mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-09-12 16:43:41 +03:00
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7534 3c298f89-4303-0410-b956-a3cf2f4a3e73
15022 lines
396 KiB
Diff
15022 lines
396 KiB
Diff
diff -urN linux-2.6.21.1/fs/Kconfig linux-2.6.21.1.new/fs/Kconfig
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--- linux-2.6.21.1/fs/Kconfig 2007-06-08 14:07:09.000000000 +0200
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+++ linux-2.6.21.1.new/fs/Kconfig 2007-06-08 14:09:26.000000000 +0200
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@@ -419,6 +419,7 @@
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source "fs/xfs/Kconfig"
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source "fs/gfs2/Kconfig"
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+source "fs/yaffs2/Kconfig"
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config OCFS2_FS
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tristate "OCFS2 file system support"
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diff -urN linux-2.6.21.1/fs/Makefile linux-2.6.21.1.new/fs/Makefile
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--- linux-2.6.21.1/fs/Makefile 2007-06-08 14:07:09.000000000 +0200
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+++ linux-2.6.21.1.new/fs/Makefile 2007-06-08 14:09:51.000000000 +0200
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@@ -116,3 +116,4 @@
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obj-$(CONFIG_DEBUG_FS) += debugfs/
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obj-$(CONFIG_OCFS2_FS) += ocfs2/
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obj-$(CONFIG_GFS2_FS) += gfs2/
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+obj-$(CONFIG_YAFFS_FS) += yaffs2/
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diff -urN linux-2.6.21.1/fs/yaffs2/Kconfig linux-2.6.21.1.new/fs/yaffs2/Kconfig
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--- linux-2.6.21.1/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.21.1.new/fs/yaffs2/Kconfig 2007-06-08 14:07:26.000000000 +0200
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@@ -0,0 +1,175 @@
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+#
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+# YAFFS file system configurations
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+#
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+
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+config YAFFS_FS
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+ tristate "YAFFS2 file system support"
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+ default n
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+ depends on MTD
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+ select YAFFS_YAFFS1
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+ select YAFFS_YAFFS2
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+ help
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+ YAFFS2, or Yet Another Flash Filing System, is a filing system
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+ optimised for NAND Flash chips.
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+
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+ To compile the YAFFS2 file system support as a module, choose M
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+ here: the module will be called yaffs2.
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+
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+ If unsure, say N.
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+
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+ Further information on YAFFS2 is available at
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+ <http://www.aleph1.co.uk/yaffs/>.
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+
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+config YAFFS_YAFFS1
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+ bool "512 byte / page devices"
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+ depends on YAFFS_FS
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+ default y
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+ help
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+ Enable YAFFS1 support -- yaffs for 512 byte / page devices
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+
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+ Not needed for 2K-page devices.
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+
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+ If unsure, say Y.
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+
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+config YAFFS_9BYTE_TAGS
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+ bool "Use older-style on-NAND data format with pageStatus byte"
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+ depends on YAFFS_YAFFS1
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+ default n
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+ help
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+
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+ Older-style on-NAND data format has a "pageStatus" byte to record
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+ chunk/page state. This byte is zero when the page is discarded.
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+ Choose this option if you have existing on-NAND data using this
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+ format that you need to continue to support. New data written
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+ also uses the older-style format. Note: Use of this option
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+ generally requires that MTD's oob layout be adjusted to use the
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+ older-style format. See notes on tags formats and MTD versions.
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+
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+ If unsure, say N.
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+
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+config YAFFS_DOES_ECC
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+ bool "Lets Yaffs do its own ECC"
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+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
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+ default n
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+ help
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+ This enables Yaffs to use its own ECC functions instead of using
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+ the ones from the generic MTD-NAND driver.
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+
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+ If unsure, say N.
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+
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+config YAFFS_ECC_WRONG_ORDER
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+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
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+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
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+ default n
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+ help
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+ This makes yaffs_ecc.c use the same ecc byte order as Steven
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+ Hill's nand_ecc.c. If not set, then you get the same ecc byte
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+ order as SmartMedia.
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+
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+ If unsure, say N.
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+
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+config YAFFS_YAFFS2
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+ bool "2048 byte (or larger) / page devices"
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+ depends on YAFFS_FS
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+ default y
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+ help
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+ Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices
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+
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+ If unsure, say Y.
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+
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+config YAFFS_AUTO_YAFFS2
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+ bool "Autoselect yaffs2 format"
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+ depends on YAFFS_YAFFS2
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+ default y
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+ help
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+ Without this, you need to explicitely use yaffs2 as the file
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+ system type. With this, you can say "yaffs" and yaffs or yaffs2
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+ will be used depending on the device page size (yaffs on
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+ 512-byte page devices, yaffs2 on 2K page devices).
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+
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+ If unsure, say Y.
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+
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+config YAFFS_DISABLE_LAZY_LOAD
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+ bool "Disable lazy loading"
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+ depends on YAFFS_YAFFS2
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+ default n
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+ help
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+ "Lazy loading" defers loading file details until they are
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+ required. This saves mount time, but makes the first look-up
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+ a bit longer.
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+
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+ Lazy loading will only happen if enabled by this option being 'n'
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+ and if the appropriate tags are available, else yaffs2 will
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+ automatically fall back to immediate loading and do the right
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+ thing.
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+
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+ Lazy laoding will be required by checkpointing.
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+
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+ Setting this to 'y' will disable lazy loading.
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+
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+ If unsure, say N.
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+
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+config YAFFS_CHECKPOINT_RESERVED_BLOCKS
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+ int "Reserved blocks for checkpointing"
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+ depends on YAFFS_YAFFS2
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+ default 10
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+ help
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+ Give the number of Blocks to reserve for checkpointing.
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+ Checkpointing saves the state at unmount so that mounting is
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+ much faster as a scan of all the flash to regenerate this state
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+ is not needed. These Blocks are reserved per partition, so if
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+ you have very small partitions the default (10) may be a mess
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+ for you. You can set this value to 0, but that does not mean
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+ checkpointing is disabled at all. There only won't be any
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+ specially reserved blocks for checkpointing, so if there is
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+ enough free space on the filesystem, it will be used for
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+ checkpointing.
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+
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+ If unsure, leave at default (10), but don't wonder if there are
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+ always 2MB used on your large page device partition (10 x 2k
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+ pagesize). When using small partitions or when being very small
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+ on space, you probably want to set this to zero.
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+
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+config YAFFS_DISABLE_WIDE_TNODES
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+ bool "Turn off wide tnodes"
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+ depends on YAFFS_FS
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+ default n
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+ help
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+ Wide tnodes are only used for NAND arrays >=32MB for 512-byte
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+ page devices and >=128MB for 2k page devices. They use slightly
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+ more RAM but are faster since they eliminate chunk group
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+ searching.
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+
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+ Setting this to 'y' will force tnode width to 16 bits and save
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+ memory but make large arrays slower.
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+
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+ If unsure, say N.
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+
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+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
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+ bool "Force chunk erase check"
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+ depends on YAFFS_FS
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+ default n
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+ help
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+ Normally YAFFS only checks chunks before writing until an erased
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+ chunk is found. This helps to detect any partially written
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+ chunks that might have happened due to power loss.
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+
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+ Enabling this forces on the test that chunks are erased in flash
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+ before writing to them. This takes more time but is potentially
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+ a bit more secure.
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+
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+ Suggest setting Y during development and ironing out driver
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+ issues etc. Suggest setting to N if you want faster writing.
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+
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+ If unsure, say Y.
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+
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+config YAFFS_SHORT_NAMES_IN_RAM
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+ bool "Cache short names in RAM"
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+ depends on YAFFS_FS
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+ default y
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+ help
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+ If this config is set, then short names are stored with the
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+ yaffs_Object. This costs an extra 16 bytes of RAM per object,
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+ but makes look-ups faster.
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+
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+ If unsure, say Y.
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diff -urN linux-2.6.21.1/fs/yaffs2/Makefile linux-2.6.21.1.new/fs/yaffs2/Makefile
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--- linux-2.6.21.1/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.21.1.new/fs/yaffs2/Makefile 2007-06-08 14:07:26.000000000 +0200
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@@ -0,0 +1,11 @@
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+#
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+# Makefile for the linux YAFFS filesystem routines.
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+#
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+
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+obj-$(CONFIG_YAFFS_FS) += yaffs.o
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+
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+yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
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+yaffs-y += yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
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+yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
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+yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o
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+yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
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diff -urN linux-2.6.21.1/fs/yaffs2/devextras.h linux-2.6.21.1.new/fs/yaffs2/devextras.h
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--- linux-2.6.21.1/fs/yaffs2/devextras.h 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.21.1.new/fs/yaffs2/devextras.h 2007-06-08 14:07:26.000000000 +0200
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@@ -0,0 +1,264 @@
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+/*
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+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
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+ *
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+ * Copyright (C) 2002-2007 Aleph One Ltd.
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+ * for Toby Churchill Ltd and Brightstar Engineering
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+ *
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+ * Created by Charles Manning <charles@aleph1.co.uk>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU Lesser General Public License version 2.1 as
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+ * published by the Free Software Foundation.
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+ *
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+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
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+ */
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+
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+/*
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+ * This file is just holds extra declarations used during development.
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+ * Most of these are from kernel includes placed here so we can use them in
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+ * applications.
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+ *
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+ */
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+
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+#ifndef __EXTRAS_H__
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+#define __EXTRAS_H__
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+
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+#if defined WIN32
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+#define __inline__ __inline
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+#define new newHack
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+#endif
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+
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+#if !(defined __KERNEL__) || (defined WIN32)
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+
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+/* User space defines */
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+
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+typedef unsigned char __u8;
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+typedef unsigned short __u16;
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+typedef unsigned __u32;
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+
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+/*
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+ * Simple doubly linked list implementation.
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+ *
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+ * Some of the internal functions ("__xxx") are useful when
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+ * manipulating whole lists rather than single entries, as
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+ * sometimes we already know the next/prev entries and we can
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+ * generate better code by using them directly rather than
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+ * using the generic single-entry routines.
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+ */
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+
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+#define prefetch(x) 1
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+
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+struct list_head {
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+ struct list_head *next, *prev;
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+};
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+
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+#define LIST_HEAD_INIT(name) { &(name), &(name) }
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+
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+#define LIST_HEAD(name) \
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+ struct list_head name = LIST_HEAD_INIT(name)
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+
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+#define INIT_LIST_HEAD(ptr) do { \
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+ (ptr)->next = (ptr); (ptr)->prev = (ptr); \
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+} while (0)
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+
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+/*
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+ * Insert a new entry between two known consecutive entries.
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+ *
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+ * This is only for internal list manipulation where we know
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+ * the prev/next entries already!
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+ */
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+static __inline__ void __list_add(struct list_head *new,
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+ struct list_head *prev,
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+ struct list_head *next)
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+{
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+ next->prev = new;
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+ new->next = next;
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+ new->prev = prev;
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+ prev->next = new;
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+}
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+
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+/**
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+ * list_add - add a new entry
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+ * @new: new entry to be added
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+ * @head: list head to add it after
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+ *
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+ * Insert a new entry after the specified head.
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+ * This is good for implementing stacks.
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+ */
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+static __inline__ void list_add(struct list_head *new, struct list_head *head)
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+{
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+ __list_add(new, head, head->next);
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+}
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+
|
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+/**
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+ * list_add_tail - add a new entry
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+ * @new: new entry to be added
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+ * @head: list head to add it before
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+ *
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+ * Insert a new entry before the specified head.
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+ * This is useful for implementing queues.
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+ */
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+static __inline__ void list_add_tail(struct list_head *new,
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+ struct list_head *head)
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+{
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+ __list_add(new, head->prev, head);
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+}
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+
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+/*
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+ * Delete a list entry by making the prev/next entries
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+ * point to each other.
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+ *
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+ * This is only for internal list manipulation where we know
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+ * the prev/next entries already!
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+ */
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+static __inline__ void __list_del(struct list_head *prev,
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+ struct list_head *next)
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+{
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+ next->prev = prev;
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+ prev->next = next;
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+}
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+
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+/**
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+ * list_del - deletes entry from list.
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+ * @entry: the element to delete from the list.
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+ * Note: list_empty on entry does not return true after this, the entry is
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+ * in an undefined state.
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+ */
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+static __inline__ void list_del(struct list_head *entry)
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+{
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+ __list_del(entry->prev, entry->next);
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+}
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+
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+/**
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+ * list_del_init - deletes entry from list and reinitialize it.
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+ * @entry: the element to delete from the list.
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+ */
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+static __inline__ void list_del_init(struct list_head *entry)
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+{
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+ __list_del(entry->prev, entry->next);
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+ INIT_LIST_HEAD(entry);
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+}
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+
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+/**
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+ * list_empty - tests whether a list is empty
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+ * @head: the list to test.
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+ */
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+static __inline__ int list_empty(struct list_head *head)
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+{
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+ return head->next == head;
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+}
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+
|
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+/**
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+ * list_splice - join two lists
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+ * @list: the new list to add.
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+ * @head: the place to add it in the first list.
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+ */
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+static __inline__ void list_splice(struct list_head *list,
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+ struct list_head *head)
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+{
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|
+ struct list_head *first = list->next;
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+
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+ if (first != list) {
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+ struct list_head *last = list->prev;
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+ struct list_head *at = head->next;
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+
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+ first->prev = head;
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+ head->next = first;
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+
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+ last->next = at;
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+ at->prev = last;
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+ }
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+}
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+
|
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+/**
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|
+ * list_entry - get the struct for this entry
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|
+ * @ptr: the &struct list_head pointer.
|
|
+ * @type: the type of the struct this is embedded in.
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|
+ * @member: the name of the list_struct within the struct.
|
|
+ */
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|
+#define list_entry(ptr, type, member) \
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+ ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
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|
+
|
|
+/**
|
|
+ * list_for_each - iterate over a list
|
|
+ * @pos: the &struct list_head to use as a loop counter.
|
|
+ * @head: the head for your list.
|
|
+ */
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|
+#define list_for_each(pos, head) \
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+ for (pos = (head)->next, prefetch(pos->next); pos != (head); \
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+ pos = pos->next, prefetch(pos->next))
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|
+
|
|
+/**
|
|
+ * list_for_each_safe - iterate over a list safe against removal
|
|
+ * of list entry
|
|
+ * @pos: the &struct list_head to use as a loop counter.
|
|
+ * @n: another &struct list_head to use as temporary storage
|
|
+ * @head: the head for your list.
|
|
+ */
|
|
+#define list_for_each_safe(pos, n, head) \
|
|
+ for (pos = (head)->next, n = pos->next; pos != (head); \
|
|
+ pos = n, n = pos->next)
|
|
+
|
|
+/*
|
|
+ * File types
|
|
+ */
|
|
+#define DT_UNKNOWN 0
|
|
+#define DT_FIFO 1
|
|
+#define DT_CHR 2
|
|
+#define DT_DIR 4
|
|
+#define DT_BLK 6
|
|
+#define DT_REG 8
|
|
+#define DT_LNK 10
|
|
+#define DT_SOCK 12
|
|
+#define DT_WHT 14
|
|
+
|
|
+#ifndef WIN32
|
|
+#include <sys/stat.h>
|
|
+#endif
|
|
+
|
|
+/*
|
|
+ * Attribute flags. These should be or-ed together to figure out what
|
|
+ * has been changed!
|
|
+ */
|
|
+#define ATTR_MODE 1
|
|
+#define ATTR_UID 2
|
|
+#define ATTR_GID 4
|
|
+#define ATTR_SIZE 8
|
|
+#define ATTR_ATIME 16
|
|
+#define ATTR_MTIME 32
|
|
+#define ATTR_CTIME 64
|
|
+#define ATTR_ATIME_SET 128
|
|
+#define ATTR_MTIME_SET 256
|
|
+#define ATTR_FORCE 512 /* Not a change, but a change it */
|
|
+#define ATTR_ATTR_FLAG 1024
|
|
+
|
|
+struct iattr {
|
|
+ unsigned int ia_valid;
|
|
+ unsigned ia_mode;
|
|
+ unsigned ia_uid;
|
|
+ unsigned ia_gid;
|
|
+ unsigned ia_size;
|
|
+ unsigned ia_atime;
|
|
+ unsigned ia_mtime;
|
|
+ unsigned ia_ctime;
|
|
+ unsigned int ia_attr_flags;
|
|
+};
|
|
+
|
|
+#define KERN_DEBUG
|
|
+
|
|
+#else
|
|
+
|
|
+#ifndef WIN32
|
|
+#include <linux/types.h>
|
|
+#include <linux/list.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/stat.h>
|
|
+#endif
|
|
+
|
|
+#endif
|
|
+
|
|
+#if defined WIN32
|
|
+#undef new
|
|
+#endif
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/moduleconfig.h linux-2.6.21.1.new/fs/yaffs2/moduleconfig.h
|
|
--- linux-2.6.21.1/fs/yaffs2/moduleconfig.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/moduleconfig.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,65 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Martin Fouts <Martin.Fouts@palmsource.com>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_CONFIG_H__
|
|
+#define __YAFFS_CONFIG_H__
|
|
+
|
|
+#ifdef YAFFS_OUT_OF_TREE
|
|
+
|
|
+/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
|
|
+#define CONFIG_YAFFS_FS
|
|
+#define CONFIG_YAFFS_YAFFS1
|
|
+#define CONFIG_YAFFS_YAFFS2
|
|
+
|
|
+/* These options are independent of each other. Select those that matter. */
|
|
+
|
|
+/* Default: Not selected */
|
|
+/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
|
|
+//#define CONFIG_YAFFS_DOES_ECC
|
|
+
|
|
+/* Default: Not selected */
|
|
+/* Meaning: ECC byte order is 'wrong'. Only meaningful if */
|
|
+/* CONFIG_YAFFS_DOES_ECC is set */
|
|
+//#define CONFIG_YAFFS_ECC_WRONG_ORDER
|
|
+
|
|
+/* Default: Selected */
|
|
+/* Meaning: Disables testing whether chunks are erased before writing to them*/
|
|
+#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
|
|
+
|
|
+/* Default: Selected */
|
|
+/* Meaning: Cache short names, taking more RAM, but faster look-ups */
|
|
+#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
|
+
|
|
+/* Default: 10 */
|
|
+/* Meaning: set the count of blocks to reserve for checkpointing */
|
|
+#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
|
|
+
|
|
+/*
|
|
+Older-style on-NAND data format has a "pageStatus" byte to record
|
|
+chunk/page state. This byte is zeroed when the page is discarded.
|
|
+Choose this option if you have existing on-NAND data in this format
|
|
+that you need to continue to support. New data written also uses the
|
|
+older-style format.
|
|
+Note: Use of this option generally requires that MTD's oob layout be
|
|
+adjusted to use the older-style format. See notes on tags formats and
|
|
+MTD versions.
|
|
+*/
|
|
+/* Default: Not selected */
|
|
+/* Meaning: Use older-style on-NAND data format with pageStatus byte */
|
|
+#define CONFIG_YAFFS_9BYTE_TAGS
|
|
+
|
|
+#endif /* YAFFS_OUT_OF_TREE */
|
|
+
|
|
+#endif /* __YAFFS_CONFIG_H__ */
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.c linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,404 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+const char *yaffs_checkptrw_c_version =
|
|
+ "$Id: yaffs_checkptrw.c,v 1.14 2007-05-15 20:07:40 charles Exp $";
|
|
+
|
|
+
|
|
+#include "yaffs_checkptrw.h"
|
|
+
|
|
+
|
|
+static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
|
|
+{
|
|
+
|
|
+ int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,
|
|
+ (TSTR("checkpt blocks available = %d" TENDSTR),
|
|
+ blocksAvailable));
|
|
+
|
|
+
|
|
+ return (blocksAvailable <= 0) ? 0 : 1;
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_CheckpointErase(yaffs_Device *dev)
|
|
+{
|
|
+
|
|
+ int i;
|
|
+
|
|
+
|
|
+ if(!dev->eraseBlockInNAND)
|
|
+ return 0;
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR),
|
|
+ dev->internalStartBlock,dev->internalEndBlock));
|
|
+
|
|
+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
|
|
+ if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("erasing checkpt block %d"TENDSTR),i));
|
|
+ if(dev->eraseBlockInNAND(dev,i- dev->blockOffset /* realign */)){
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ dev->nErasedBlocks++;
|
|
+ dev->nFreeChunks += dev->nChunksPerBlock;
|
|
+ }
|
|
+ else {
|
|
+ dev->markNANDBlockBad(dev,i);
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ dev->blocksInCheckpoint = 0;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
|
|
+{
|
|
+ int i;
|
|
+ int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
|
|
+ T(YAFFS_TRACE_CHECKPOINT,
|
|
+ (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
|
|
+ dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock));
|
|
+
|
|
+ if(dev->checkpointNextBlock >= 0 &&
|
|
+ dev->checkpointNextBlock <= dev->internalEndBlock &&
|
|
+ blocksAvailable > 0){
|
|
+
|
|
+ for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
|
|
+ if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){
|
|
+ dev->checkpointNextBlock = i + 1;
|
|
+ dev->checkpointCurrentBlock = i;
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("allocating checkpt block %d"TENDSTR),i));
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR)));
|
|
+
|
|
+ dev->checkpointNextBlock = -1;
|
|
+ dev->checkpointCurrentBlock = -1;
|
|
+}
|
|
+
|
|
+static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
|
|
+{
|
|
+ int i;
|
|
+ yaffs_ExtendedTags tags;
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR),
|
|
+ dev->blocksInCheckpoint, dev->checkpointNextBlock));
|
|
+
|
|
+ if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
|
|
+ for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){
|
|
+ int chunk = i * dev->nChunksPerBlock;
|
|
+ int realignedChunk = chunk - dev->chunkOffset;
|
|
+
|
|
+ dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags);
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
|
|
+ i, tags.objectId,tags.sequenceNumber,tags.eccResult));
|
|
+
|
|
+ if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){
|
|
+ /* Right kind of block */
|
|
+ dev->checkpointNextBlock = tags.objectId;
|
|
+ dev->checkpointCurrentBlock = i;
|
|
+ dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
|
|
+ dev->blocksInCheckpoint++;
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("found checkpt block %d"TENDSTR),i));
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("found no more checkpt blocks"TENDSTR)));
|
|
+
|
|
+ dev->checkpointNextBlock = -1;
|
|
+ dev->checkpointCurrentBlock = -1;
|
|
+}
|
|
+
|
|
+
|
|
+int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
|
|
+{
|
|
+
|
|
+ /* Got the functions we need? */
|
|
+ if (!dev->writeChunkWithTagsToNAND ||
|
|
+ !dev->readChunkWithTagsFromNAND ||
|
|
+ !dev->eraseBlockInNAND ||
|
|
+ !dev->markNANDBlockBad)
|
|
+ return 0;
|
|
+
|
|
+ if(forWriting && !yaffs_CheckpointSpaceOk(dev))
|
|
+ return 0;
|
|
+
|
|
+ if(!dev->checkpointBuffer)
|
|
+ dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk);
|
|
+ if(!dev->checkpointBuffer)
|
|
+ return 0;
|
|
+
|
|
+
|
|
+ dev->checkpointPageSequence = 0;
|
|
+
|
|
+ dev->checkpointOpenForWrite = forWriting;
|
|
+
|
|
+ dev->checkpointByteCount = 0;
|
|
+ dev->checkpointSum = 0;
|
|
+ dev->checkpointXor = 0;
|
|
+ dev->checkpointCurrentBlock = -1;
|
|
+ dev->checkpointCurrentChunk = -1;
|
|
+ dev->checkpointNextBlock = dev->internalStartBlock;
|
|
+
|
|
+ /* Erase all the blocks in the checkpoint area */
|
|
+ if(forWriting){
|
|
+ memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk);
|
|
+ dev->checkpointByteOffset = 0;
|
|
+ return yaffs_CheckpointErase(dev);
|
|
+
|
|
+
|
|
+ } else {
|
|
+ int i;
|
|
+ /* Set to a value that will kick off a read */
|
|
+ dev->checkpointByteOffset = dev->nDataBytesPerChunk;
|
|
+ /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully)
|
|
+ * going to be way more than we need */
|
|
+ dev->blocksInCheckpoint = 0;
|
|
+ dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
|
|
+ dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
|
|
+ for(i = 0; i < dev->checkpointMaxBlocks; i++)
|
|
+ dev->checkpointBlockList[i] = -1;
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
|
|
+{
|
|
+ __u32 compositeSum;
|
|
+ compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
|
|
+ *sum = compositeSum;
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
|
|
+{
|
|
+
|
|
+ int chunk;
|
|
+ int realignedChunk;
|
|
+
|
|
+ yaffs_ExtendedTags tags;
|
|
+
|
|
+ if(dev->checkpointCurrentBlock < 0){
|
|
+ yaffs_CheckpointFindNextErasedBlock(dev);
|
|
+ dev->checkpointCurrentChunk = 0;
|
|
+ }
|
|
+
|
|
+ if(dev->checkpointCurrentBlock < 0)
|
|
+ return 0;
|
|
+
|
|
+ tags.chunkDeleted = 0;
|
|
+ tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */
|
|
+ tags.chunkId = dev->checkpointPageSequence + 1;
|
|
+ tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA;
|
|
+ tags.byteCount = dev->nDataBytesPerChunk;
|
|
+ if(dev->checkpointCurrentChunk == 0){
|
|
+ /* First chunk we write for the block? Set block state to
|
|
+ checkpoint */
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointCurrentBlock);
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
|
|
+ dev->blocksInCheckpoint++;
|
|
+ }
|
|
+
|
|
+ chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
|
|
+
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
|
|
+ chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId));
|
|
+
|
|
+ realignedChunk = chunk - dev->chunkOffset;
|
|
+
|
|
+ dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags);
|
|
+ dev->checkpointByteOffset = 0;
|
|
+ dev->checkpointPageSequence++;
|
|
+ dev->checkpointCurrentChunk++;
|
|
+ if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){
|
|
+ dev->checkpointCurrentChunk = 0;
|
|
+ dev->checkpointCurrentBlock = -1;
|
|
+ }
|
|
+ memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk);
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes)
|
|
+{
|
|
+ int i=0;
|
|
+ int ok = 1;
|
|
+
|
|
+
|
|
+ __u8 * dataBytes = (__u8 *)data;
|
|
+
|
|
+
|
|
+
|
|
+ if(!dev->checkpointBuffer)
|
|
+ return 0;
|
|
+
|
|
+ if(!dev->checkpointOpenForWrite)
|
|
+ return -1;
|
|
+
|
|
+ while(i < nBytes && ok) {
|
|
+
|
|
+
|
|
+
|
|
+ dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ;
|
|
+ dev->checkpointSum += *dataBytes;
|
|
+ dev->checkpointXor ^= *dataBytes;
|
|
+
|
|
+ dev->checkpointByteOffset++;
|
|
+ i++;
|
|
+ dataBytes++;
|
|
+ dev->checkpointByteCount++;
|
|
+
|
|
+
|
|
+ if(dev->checkpointByteOffset < 0 ||
|
|
+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
|
|
+ ok = yaffs_CheckpointFlushBuffer(dev);
|
|
+
|
|
+ }
|
|
+
|
|
+ return i;
|
|
+}
|
|
+
|
|
+int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
|
|
+{
|
|
+ int i=0;
|
|
+ int ok = 1;
|
|
+ yaffs_ExtendedTags tags;
|
|
+
|
|
+
|
|
+ int chunk;
|
|
+ int realignedChunk;
|
|
+
|
|
+ __u8 *dataBytes = (__u8 *)data;
|
|
+
|
|
+ if(!dev->checkpointBuffer)
|
|
+ return 0;
|
|
+
|
|
+ if(dev->checkpointOpenForWrite)
|
|
+ return -1;
|
|
+
|
|
+ while(i < nBytes && ok) {
|
|
+
|
|
+
|
|
+ if(dev->checkpointByteOffset < 0 ||
|
|
+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
|
|
+
|
|
+ if(dev->checkpointCurrentBlock < 0){
|
|
+ yaffs_CheckpointFindNextCheckpointBlock(dev);
|
|
+ dev->checkpointCurrentChunk = 0;
|
|
+ }
|
|
+
|
|
+ if(dev->checkpointCurrentBlock < 0)
|
|
+ ok = 0;
|
|
+ else {
|
|
+
|
|
+ chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock +
|
|
+ dev->checkpointCurrentChunk;
|
|
+
|
|
+ realignedChunk = chunk - dev->chunkOffset;
|
|
+
|
|
+ /* read in the next chunk */
|
|
+ /* printf("read checkpoint page %d\n",dev->checkpointPage); */
|
|
+ dev->readChunkWithTagsFromNAND(dev, realignedChunk,
|
|
+ dev->checkpointBuffer,
|
|
+ &tags);
|
|
+
|
|
+ if(tags.chunkId != (dev->checkpointPageSequence + 1) ||
|
|
+ tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
|
|
+ ok = 0;
|
|
+
|
|
+ dev->checkpointByteOffset = 0;
|
|
+ dev->checkpointPageSequence++;
|
|
+ dev->checkpointCurrentChunk++;
|
|
+
|
|
+ if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
|
|
+ dev->checkpointCurrentBlock = -1;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if(ok){
|
|
+ *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
|
|
+ dev->checkpointSum += *dataBytes;
|
|
+ dev->checkpointXor ^= *dataBytes;
|
|
+ dev->checkpointByteOffset++;
|
|
+ i++;
|
|
+ dataBytes++;
|
|
+ dev->checkpointByteCount++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return i;
|
|
+}
|
|
+
|
|
+int yaffs_CheckpointClose(yaffs_Device *dev)
|
|
+{
|
|
+
|
|
+ if(dev->checkpointOpenForWrite){
|
|
+ if(dev->checkpointByteOffset != 0)
|
|
+ yaffs_CheckpointFlushBuffer(dev);
|
|
+ } else {
|
|
+ int i;
|
|
+ for(i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++){
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointBlockList[i]);
|
|
+ if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
|
|
+ else {
|
|
+ // Todo this looks odd...
|
|
+ }
|
|
+ }
|
|
+ YFREE(dev->checkpointBlockList);
|
|
+ dev->checkpointBlockList = NULL;
|
|
+ }
|
|
+
|
|
+ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
|
|
+ dev->nErasedBlocks -= dev->blocksInCheckpoint;
|
|
+
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR),
|
|
+ dev->checkpointByteCount));
|
|
+
|
|
+ if(dev->checkpointBuffer){
|
|
+ /* free the buffer */
|
|
+ YFREE(dev->checkpointBuffer);
|
|
+ dev->checkpointBuffer = NULL;
|
|
+ return 1;
|
|
+ }
|
|
+ else
|
|
+ return 0;
|
|
+
|
|
+}
|
|
+
|
|
+int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
|
|
+{
|
|
+ /* Erase the first checksum block */
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint invalidate"TENDSTR)));
|
|
+
|
|
+ if(!yaffs_CheckpointSpaceOk(dev))
|
|
+ return 0;
|
|
+
|
|
+ return yaffs_CheckpointErase(dev);
|
|
+}
|
|
+
|
|
+
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.h linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,35 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_CHECKPTRW_H__
|
|
+#define __YAFFS_CHECKPTRW_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
|
|
+
|
|
+int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes);
|
|
+
|
|
+int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes);
|
|
+
|
|
+int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
|
|
+
|
|
+int yaffs_CheckpointClose(yaffs_Device *dev);
|
|
+
|
|
+int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
|
|
+
|
|
+
|
|
+#endif
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_ecc.c linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,331 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * This code implements the ECC algorithm used in SmartMedia.
|
|
+ *
|
|
+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
|
|
+ * The two unused bit are set to 1.
|
|
+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
|
|
+ * blocks are used on a 512-byte NAND page.
|
|
+ *
|
|
+ */
|
|
+
|
|
+/* Table generated by gen-ecc.c
|
|
+ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
|
|
+ * for each byte of data. These are instead provided in a table in bits7..2.
|
|
+ * Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore
|
|
+ * this bytes influence on the line parity.
|
|
+ */
|
|
+
|
|
+const char *yaffs_ecc_c_version =
|
|
+ "$Id: yaffs_ecc.c,v 1.9 2007-02-14 01:09:06 wookey Exp $";
|
|
+
|
|
+#include "yportenv.h"
|
|
+
|
|
+#include "yaffs_ecc.h"
|
|
+
|
|
+static const unsigned char column_parity_table[] = {
|
|
+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
|
|
+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
|
|
+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
|
|
+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
|
|
+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
|
|
+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
|
|
+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
|
|
+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
|
|
+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
|
|
+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
|
|
+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
|
|
+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
|
|
+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
|
|
+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
|
|
+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
|
|
+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
|
|
+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
|
|
+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
|
|
+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
|
|
+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
|
|
+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
|
|
+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
|
|
+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
|
|
+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
|
|
+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
|
|
+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
|
|
+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
|
|
+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
|
|
+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
|
|
+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
|
|
+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
|
|
+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
|
|
+};
|
|
+
|
|
+/* Count the bits in an unsigned char or a U32 */
|
|
+
|
|
+static int yaffs_CountBits(unsigned char x)
|
|
+{
|
|
+ int r = 0;
|
|
+ while (x) {
|
|
+ if (x & 1)
|
|
+ r++;
|
|
+ x >>= 1;
|
|
+ }
|
|
+ return r;
|
|
+}
|
|
+
|
|
+static int yaffs_CountBits32(unsigned x)
|
|
+{
|
|
+ int r = 0;
|
|
+ while (x) {
|
|
+ if (x & 1)
|
|
+ r++;
|
|
+ x >>= 1;
|
|
+ }
|
|
+ return r;
|
|
+}
|
|
+
|
|
+/* Calculate the ECC for a 256-byte block of data */
|
|
+void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc)
|
|
+{
|
|
+ unsigned int i;
|
|
+
|
|
+ unsigned char col_parity = 0;
|
|
+ unsigned char line_parity = 0;
|
|
+ unsigned char line_parity_prime = 0;
|
|
+ unsigned char t;
|
|
+ unsigned char b;
|
|
+
|
|
+ for (i = 0; i < 256; i++) {
|
|
+ b = column_parity_table[*data++];
|
|
+ col_parity ^= b;
|
|
+
|
|
+ if (b & 0x01) // odd number of bits in the byte
|
|
+ {
|
|
+ line_parity ^= i;
|
|
+ line_parity_prime ^= ~i;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ ecc[2] = (~col_parity) | 0x03;
|
|
+
|
|
+ t = 0;
|
|
+ if (line_parity & 0x80)
|
|
+ t |= 0x80;
|
|
+ if (line_parity_prime & 0x80)
|
|
+ t |= 0x40;
|
|
+ if (line_parity & 0x40)
|
|
+ t |= 0x20;
|
|
+ if (line_parity_prime & 0x40)
|
|
+ t |= 0x10;
|
|
+ if (line_parity & 0x20)
|
|
+ t |= 0x08;
|
|
+ if (line_parity_prime & 0x20)
|
|
+ t |= 0x04;
|
|
+ if (line_parity & 0x10)
|
|
+ t |= 0x02;
|
|
+ if (line_parity_prime & 0x10)
|
|
+ t |= 0x01;
|
|
+ ecc[1] = ~t;
|
|
+
|
|
+ t = 0;
|
|
+ if (line_parity & 0x08)
|
|
+ t |= 0x80;
|
|
+ if (line_parity_prime & 0x08)
|
|
+ t |= 0x40;
|
|
+ if (line_parity & 0x04)
|
|
+ t |= 0x20;
|
|
+ if (line_parity_prime & 0x04)
|
|
+ t |= 0x10;
|
|
+ if (line_parity & 0x02)
|
|
+ t |= 0x08;
|
|
+ if (line_parity_prime & 0x02)
|
|
+ t |= 0x04;
|
|
+ if (line_parity & 0x01)
|
|
+ t |= 0x02;
|
|
+ if (line_parity_prime & 0x01)
|
|
+ t |= 0x01;
|
|
+ ecc[0] = ~t;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
|
|
+ // Swap the bytes into the wrong order
|
|
+ t = ecc[0];
|
|
+ ecc[0] = ecc[1];
|
|
+ ecc[1] = t;
|
|
+#endif
|
|
+}
|
|
+
|
|
+
|
|
+/* Correct the ECC on a 256 byte block of data */
|
|
+
|
|
+int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
|
|
+ const unsigned char *test_ecc)
|
|
+{
|
|
+ unsigned char d0, d1, d2; /* deltas */
|
|
+
|
|
+ d0 = read_ecc[0] ^ test_ecc[0];
|
|
+ d1 = read_ecc[1] ^ test_ecc[1];
|
|
+ d2 = read_ecc[2] ^ test_ecc[2];
|
|
+
|
|
+ if ((d0 | d1 | d2) == 0)
|
|
+ return 0; /* no error */
|
|
+
|
|
+ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
|
|
+ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
|
|
+ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
|
|
+ /* Single bit (recoverable) error in data */
|
|
+
|
|
+ unsigned byte;
|
|
+ unsigned bit;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
|
|
+ // swap the bytes to correct for the wrong order
|
|
+ unsigned char t;
|
|
+
|
|
+ t = d0;
|
|
+ d0 = d1;
|
|
+ d1 = t;
|
|
+#endif
|
|
+
|
|
+ bit = byte = 0;
|
|
+
|
|
+ if (d1 & 0x80)
|
|
+ byte |= 0x80;
|
|
+ if (d1 & 0x20)
|
|
+ byte |= 0x40;
|
|
+ if (d1 & 0x08)
|
|
+ byte |= 0x20;
|
|
+ if (d1 & 0x02)
|
|
+ byte |= 0x10;
|
|
+ if (d0 & 0x80)
|
|
+ byte |= 0x08;
|
|
+ if (d0 & 0x20)
|
|
+ byte |= 0x04;
|
|
+ if (d0 & 0x08)
|
|
+ byte |= 0x02;
|
|
+ if (d0 & 0x02)
|
|
+ byte |= 0x01;
|
|
+
|
|
+ if (d2 & 0x80)
|
|
+ bit |= 0x04;
|
|
+ if (d2 & 0x20)
|
|
+ bit |= 0x02;
|
|
+ if (d2 & 0x08)
|
|
+ bit |= 0x01;
|
|
+
|
|
+ data[byte] ^= (1 << bit);
|
|
+
|
|
+ return 1; /* Corrected the error */
|
|
+ }
|
|
+
|
|
+ if ((yaffs_CountBits(d0) +
|
|
+ yaffs_CountBits(d1) +
|
|
+ yaffs_CountBits(d2)) == 1) {
|
|
+ /* Reccoverable error in ecc */
|
|
+
|
|
+ read_ecc[0] = test_ecc[0];
|
|
+ read_ecc[1] = test_ecc[1];
|
|
+ read_ecc[2] = test_ecc[2];
|
|
+
|
|
+ return 1; /* Corrected the error */
|
|
+ }
|
|
+
|
|
+ /* Unrecoverable error */
|
|
+
|
|
+ return -1;
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+/*
|
|
+ * ECCxxxOther does ECC calcs on arbitrary n bytes of data
|
|
+ */
|
|
+void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
|
|
+ yaffs_ECCOther * eccOther)
|
|
+{
|
|
+ unsigned int i;
|
|
+
|
|
+ unsigned char col_parity = 0;
|
|
+ unsigned line_parity = 0;
|
|
+ unsigned line_parity_prime = 0;
|
|
+ unsigned char b;
|
|
+
|
|
+ for (i = 0; i < nBytes; i++) {
|
|
+ b = column_parity_table[*data++];
|
|
+ col_parity ^= b;
|
|
+
|
|
+ if (b & 0x01) {
|
|
+ /* odd number of bits in the byte */
|
|
+ line_parity ^= i;
|
|
+ line_parity_prime ^= ~i;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ eccOther->colParity = (col_parity >> 2) & 0x3f;
|
|
+ eccOther->lineParity = line_parity;
|
|
+ eccOther->lineParityPrime = line_parity_prime;
|
|
+}
|
|
+
|
|
+int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
|
|
+ yaffs_ECCOther * read_ecc,
|
|
+ const yaffs_ECCOther * test_ecc)
|
|
+{
|
|
+ unsigned char cDelta; /* column parity delta */
|
|
+ unsigned lDelta; /* line parity delta */
|
|
+ unsigned lDeltaPrime; /* line parity delta */
|
|
+ unsigned bit;
|
|
+
|
|
+ cDelta = read_ecc->colParity ^ test_ecc->colParity;
|
|
+ lDelta = read_ecc->lineParity ^ test_ecc->lineParity;
|
|
+ lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime;
|
|
+
|
|
+ if ((cDelta | lDelta | lDeltaPrime) == 0)
|
|
+ return 0; /* no error */
|
|
+
|
|
+ if (lDelta == ~lDeltaPrime &&
|
|
+ (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15))
|
|
+ {
|
|
+ /* Single bit (recoverable) error in data */
|
|
+
|
|
+ bit = 0;
|
|
+
|
|
+ if (cDelta & 0x20)
|
|
+ bit |= 0x04;
|
|
+ if (cDelta & 0x08)
|
|
+ bit |= 0x02;
|
|
+ if (cDelta & 0x02)
|
|
+ bit |= 0x01;
|
|
+
|
|
+ if(lDelta >= nBytes)
|
|
+ return -1;
|
|
+
|
|
+ data[lDelta] ^= (1 << bit);
|
|
+
|
|
+ return 1; /* corrected */
|
|
+ }
|
|
+
|
|
+ if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) +
|
|
+ yaffs_CountBits(cDelta)) == 1) {
|
|
+ /* Reccoverable error in ecc */
|
|
+
|
|
+ *read_ecc = *test_ecc;
|
|
+ return 1; /* corrected */
|
|
+ }
|
|
+
|
|
+ /* Unrecoverable error */
|
|
+
|
|
+ return -1;
|
|
+
|
|
+}
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_ecc.h linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,44 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+ /*
|
|
+ * This code implements the ECC algorithm used in SmartMedia.
|
|
+ *
|
|
+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
|
|
+ * The two unused bit are set to 1.
|
|
+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
|
|
+ * blocks are used on a 512-byte NAND page.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_ECC_H__
|
|
+#define __YAFFS_ECC_H__
|
|
+
|
|
+typedef struct {
|
|
+ unsigned char colParity;
|
|
+ unsigned lineParity;
|
|
+ unsigned lineParityPrime;
|
|
+} yaffs_ECCOther;
|
|
+
|
|
+void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc);
|
|
+int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
|
|
+ const unsigned char *test_ecc);
|
|
+
|
|
+void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
|
|
+ yaffs_ECCOther * ecc);
|
|
+int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
|
|
+ yaffs_ECCOther * read_ecc,
|
|
+ const yaffs_ECCOther * test_ecc);
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_fs.c linux-2.6.21.1.new/fs/yaffs2/yaffs_fs.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_fs.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_fs.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,2278 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ * Acknowledgements:
|
|
+ * Luc van OostenRyck for numerous patches.
|
|
+ * Nick Bane for numerous patches.
|
|
+ * Nick Bane for 2.5/2.6 integration.
|
|
+ * Andras Toth for mknod rdev issue.
|
|
+ * Michael Fischer for finding the problem with inode inconsistency.
|
|
+ * Some code bodily lifted from JFFS
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+/*
|
|
+ *
|
|
+ * This is the file system front-end to YAFFS that hooks it up to
|
|
+ * the VFS.
|
|
+ *
|
|
+ * Special notes:
|
|
+ * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
|
|
+ * this superblock
|
|
+ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
|
|
+ * superblock
|
|
+ * >> inode->u.generic_ip points to the associated yaffs_Object.
|
|
+ */
|
|
+
|
|
+const char *yaffs_fs_c_version =
|
|
+ "$Id: yaffs_fs.c,v 1.60 2007-05-15 20:07:40 charles Exp $";
|
|
+extern const char *yaffs_guts_c_version;
|
|
+
|
|
+#include <linux/version.h>
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
|
|
+#include <linux/config.h>
|
|
+#endif
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/slab.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/list.h>
|
|
+#include <linux/fs.h>
|
|
+#include <linux/proc_fs.h>
|
|
+#include <linux/smp_lock.h>
|
|
+#include <linux/pagemap.h>
|
|
+#include <linux/mtd/mtd.h>
|
|
+#include <linux/interrupt.h>
|
|
+#include <linux/string.h>
|
|
+#include <linux/ctype.h>
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+
|
|
+#include <linux/statfs.h> /* Added NCB 15-8-2003 */
|
|
+#include <asm/statfs.h>
|
|
+#define UnlockPage(p) unlock_page(p)
|
|
+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
|
|
+
|
|
+/* FIXME: use sb->s_id instead ? */
|
|
+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
|
|
+
|
|
+#else
|
|
+
|
|
+#include <linux/locks.h>
|
|
+#define BDEVNAME_SIZE 0
|
|
+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
|
|
+
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
|
|
+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
|
|
+#define __user
|
|
+#endif
|
|
+
|
|
+#endif
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+#define WRITE_SIZE_STR "writesize"
|
|
+#define WRITE_SIZE(mtd) (mtd)->writesize
|
|
+#else
|
|
+#define WRITE_SIZE_STR "oobblock"
|
|
+#define WRITE_SIZE(mtd) (mtd)->oobblock
|
|
+#endif
|
|
+
|
|
+#include <asm/uaccess.h>
|
|
+
|
|
+#include "yportenv.h"
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+#include <linux/mtd/mtd.h>
|
|
+#include "yaffs_mtdif.h"
|
|
+#include "yaffs_mtdif1.h"
|
|
+#include "yaffs_mtdif2.h"
|
|
+
|
|
+unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
|
|
+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
|
|
+
|
|
+/* Module Parameters */
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+module_param(yaffs_traceMask,uint,0644);
|
|
+module_param(yaffs_wr_attempts,uint,0644);
|
|
+#else
|
|
+MODULE_PARM(yaffs_traceMask,"i");
|
|
+MODULE_PARM(yaffs_wr_attempts,"i");
|
|
+#endif
|
|
+
|
|
+/*#define T(x) printk x */
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
|
|
+#define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
|
|
+#else
|
|
+#define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
|
|
+#endif
|
|
+
|
|
+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
|
|
+#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
|
|
+#else
|
|
+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
|
|
+#endif
|
|
+
|
|
+static void yaffs_put_super(struct super_block *sb);
|
|
+
|
|
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
|
|
+ loff_t * pos);
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_file_flush(struct file *file, fl_owner_t id);
|
|
+#else
|
|
+static int yaffs_file_flush(struct file *file);
|
|
+#endif
|
|
+
|
|
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
|
|
+ int datasync);
|
|
+
|
|
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
|
|
+ struct nameidata *n);
|
|
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
|
|
+ struct nameidata *n);
|
|
+#else
|
|
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
|
|
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
|
|
+#endif
|
|
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
|
|
+ struct dentry *dentry);
|
|
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
|
|
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
|
|
+ const char *symname);
|
|
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
|
|
+ dev_t dev);
|
|
+#else
|
|
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
|
|
+ int dev);
|
|
+#endif
|
|
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
+ struct inode *new_dir, struct dentry *new_dentry);
|
|
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_sync_fs(struct super_block *sb, int wait);
|
|
+static void yaffs_write_super(struct super_block *sb);
|
|
+#else
|
|
+static int yaffs_sync_fs(struct super_block *sb);
|
|
+static int yaffs_write_super(struct super_block *sb);
|
|
+#endif
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
|
|
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
|
|
+#else
|
|
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
|
|
+#endif
|
|
+static void yaffs_read_inode(struct inode *inode);
|
|
+
|
|
+static void yaffs_put_inode(struct inode *inode);
|
|
+static void yaffs_delete_inode(struct inode *);
|
|
+static void yaffs_clear_inode(struct inode *);
|
|
+
|
|
+static int yaffs_readpage(struct file *file, struct page *page);
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
|
|
+#else
|
|
+static int yaffs_writepage(struct page *page);
|
|
+#endif
|
|
+static int yaffs_prepare_write(struct file *f, struct page *pg,
|
|
+ unsigned offset, unsigned to);
|
|
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
|
|
+ unsigned to);
|
|
+
|
|
+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
|
|
+ int buflen);
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
|
|
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
|
|
+#else
|
|
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
|
|
+#endif
|
|
+
|
|
+static struct address_space_operations yaffs_file_address_operations = {
|
|
+ .readpage = yaffs_readpage,
|
|
+ .writepage = yaffs_writepage,
|
|
+ .prepare_write = yaffs_prepare_write,
|
|
+ .commit_write = yaffs_commit_write,
|
|
+};
|
|
+
|
|
+static struct file_operations yaffs_file_operations = {
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
|
|
+ .read = do_sync_read,
|
|
+ .write = do_sync_write,
|
|
+ .aio_read = generic_file_aio_read,
|
|
+ .aio_write = generic_file_aio_write,
|
|
+#else
|
|
+ .read = generic_file_read,
|
|
+ .write = generic_file_write,
|
|
+#endif
|
|
+ .mmap = generic_file_mmap,
|
|
+ .flush = yaffs_file_flush,
|
|
+ .fsync = yaffs_sync_object,
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+ .sendfile = generic_file_sendfile,
|
|
+#endif
|
|
+
|
|
+};
|
|
+
|
|
+static struct inode_operations yaffs_file_inode_operations = {
|
|
+ .setattr = yaffs_setattr,
|
|
+};
|
|
+
|
|
+static struct inode_operations yaffs_symlink_inode_operations = {
|
|
+ .readlink = yaffs_readlink,
|
|
+ .follow_link = yaffs_follow_link,
|
|
+ .setattr = yaffs_setattr,
|
|
+};
|
|
+
|
|
+static struct inode_operations yaffs_dir_inode_operations = {
|
|
+ .create = yaffs_create,
|
|
+ .lookup = yaffs_lookup,
|
|
+ .link = yaffs_link,
|
|
+ .unlink = yaffs_unlink,
|
|
+ .symlink = yaffs_symlink,
|
|
+ .mkdir = yaffs_mkdir,
|
|
+ .rmdir = yaffs_unlink,
|
|
+ .mknod = yaffs_mknod,
|
|
+ .rename = yaffs_rename,
|
|
+ .setattr = yaffs_setattr,
|
|
+};
|
|
+
|
|
+static struct file_operations yaffs_dir_operations = {
|
|
+ .read = generic_read_dir,
|
|
+ .readdir = yaffs_readdir,
|
|
+ .fsync = yaffs_sync_object,
|
|
+};
|
|
+
|
|
+static struct super_operations yaffs_super_ops = {
|
|
+ .statfs = yaffs_statfs,
|
|
+ .read_inode = yaffs_read_inode,
|
|
+ .put_inode = yaffs_put_inode,
|
|
+ .put_super = yaffs_put_super,
|
|
+ .delete_inode = yaffs_delete_inode,
|
|
+ .clear_inode = yaffs_clear_inode,
|
|
+ .sync_fs = yaffs_sync_fs,
|
|
+ .write_super = yaffs_write_super,
|
|
+};
|
|
+
|
|
+static void yaffs_GrossLock(yaffs_Device * dev)
|
|
+{
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
|
|
+
|
|
+ down(&dev->grossLock);
|
|
+}
|
|
+
|
|
+static void yaffs_GrossUnlock(yaffs_Device * dev)
|
|
+{
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
|
|
+ up(&dev->grossLock);
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
|
|
+ int buflen)
|
|
+{
|
|
+ unsigned char *alias;
|
|
+ int ret;
|
|
+
|
|
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (!alias)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ ret = vfs_readlink(dentry, buffer, buflen, alias);
|
|
+ kfree(alias);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
|
|
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
|
|
+#else
|
|
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
|
|
+#endif
|
|
+{
|
|
+ unsigned char *alias;
|
|
+ int ret;
|
|
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (!alias)
|
|
+ {
|
|
+ ret = -ENOMEM;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ ret = vfs_follow_link(nd, alias);
|
|
+ kfree(alias);
|
|
+out:
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
|
|
+ return ERR_PTR (ret);
|
|
+#else
|
|
+ return ret;
|
|
+#endif
|
|
+}
|
|
+
|
|
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
|
|
+ yaffs_Object * obj);
|
|
+
|
|
+/*
|
|
+ * Lookup is used to find objects in the fs
|
|
+ */
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+
|
|
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
|
|
+ struct nameidata *n)
|
|
+#else
|
|
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
|
|
+#endif
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
|
|
+
|
|
+ yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_lookup for %d:%s\n",
|
|
+ yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
|
|
+
|
|
+ obj =
|
|
+ yaffs_FindObjectByName(yaffs_InodeToObject(dir),
|
|
+ dentry->d_name.name);
|
|
+
|
|
+ obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
|
|
+
|
|
+ /* Can't hold gross lock when calling yaffs_get_inode() */
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (obj) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
|
|
+
|
|
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
|
|
+
|
|
+ if (inode) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_loookup dentry \n"));
|
|
+/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
|
|
+ * d_add even if NULL inode */
|
|
+#if 0
|
|
+ /*dget(dentry); // try to solve directory bug */
|
|
+ d_add(dentry, inode);
|
|
+
|
|
+ /* return dentry; */
|
|
+ return NULL;
|
|
+#endif
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
|
|
+
|
|
+ }
|
|
+
|
|
+/* added NCB for 2.5/6 compatability - forces add even if inode is
|
|
+ * NULL which creates dentry hash */
|
|
+ d_add(dentry, inode);
|
|
+
|
|
+ return NULL;
|
|
+ /* return (ERR_PTR(-EIO)); */
|
|
+
|
|
+}
|
|
+
|
|
+/* For now put inode is just for debugging
|
|
+ * Put inode is called when the inode **structure** is put.
|
|
+ */
|
|
+static void yaffs_put_inode(struct inode *inode)
|
|
+{
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
|
|
+ atomic_read(&inode->i_count)));
|
|
+
|
|
+}
|
|
+
|
|
+/* clear is called to tell the fs to release any per-inode data it holds */
|
|
+static void yaffs_clear_inode(struct inode *inode)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ obj = yaffs_InodeToObject(inode);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
|
|
+ atomic_read(&inode->i_count),
|
|
+ obj ? "object exists" : "null object"));
|
|
+
|
|
+ if (obj) {
|
|
+ dev = obj->myDev;
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ /* Clear the association between the inode and
|
|
+ * the yaffs_Object.
|
|
+ */
|
|
+ obj->myInode = NULL;
|
|
+ yaffs_InodeToObjectLV(inode) = NULL;
|
|
+
|
|
+ /* If the object freeing was deferred, then the real
|
|
+ * free happens now.
|
|
+ * This should fix the inode inconsistency problem.
|
|
+ */
|
|
+
|
|
+ yaffs_HandleDeferedFree(obj);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+/* delete is called when the link count is zero and the inode
|
|
+ * is put (ie. nobody wants to know about it anymore, time to
|
|
+ * delete the file).
|
|
+ * NB Must call clear_inode()
|
|
+ */
|
|
+static void yaffs_delete_inode(struct inode *inode)
|
|
+{
|
|
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
|
|
+ atomic_read(&inode->i_count),
|
|
+ obj ? "object exists" : "null object"));
|
|
+
|
|
+ if (obj) {
|
|
+ dev = obj->myDev;
|
|
+ yaffs_GrossLock(dev);
|
|
+ yaffs_DeleteFile(obj);
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ }
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
|
|
+ truncate_inode_pages (&inode->i_data, 0);
|
|
+#endif
|
|
+ clear_inode(inode);
|
|
+}
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_file_flush(struct file *file, fl_owner_t id)
|
|
+#else
|
|
+static int yaffs_file_flush(struct file *file)
|
|
+#endif
|
|
+{
|
|
+ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
|
|
+
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_file_flush object %d (%s)\n", obj->objectId,
|
|
+ obj->dirty ? "dirty" : "clean"));
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ yaffs_FlushFile(obj, 1);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
|
|
+{
|
|
+ /* Lifted from jffs2 */
|
|
+
|
|
+ yaffs_Object *obj;
|
|
+ unsigned char *pg_buf;
|
|
+ int ret;
|
|
+
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage at %08x, size %08x\n",
|
|
+ (unsigned)(pg->index << PAGE_CACHE_SHIFT),
|
|
+ (unsigned)PAGE_CACHE_SIZE));
|
|
+
|
|
+ obj = yaffs_DentryToObject(f->f_dentry);
|
|
+
|
|
+ dev = obj->myDev;
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+ BUG_ON(!PageLocked(pg));
|
|
+#else
|
|
+ if (!PageLocked(pg))
|
|
+ PAGE_BUG(pg);
|
|
+#endif
|
|
+
|
|
+ pg_buf = kmap(pg);
|
|
+ /* FIXME: Can kmap fail? */
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ ret =
|
|
+ yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT,
|
|
+ PAGE_CACHE_SIZE);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (ret >= 0)
|
|
+ ret = 0;
|
|
+
|
|
+ if (ret) {
|
|
+ ClearPageUptodate(pg);
|
|
+ SetPageError(pg);
|
|
+ } else {
|
|
+ SetPageUptodate(pg);
|
|
+ ClearPageError(pg);
|
|
+ }
|
|
+
|
|
+ flush_dcache_page(pg);
|
|
+ kunmap(pg);
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage done\n"));
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
|
|
+{
|
|
+ int ret = yaffs_readpage_nolock(f, pg);
|
|
+ UnlockPage(pg);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int yaffs_readpage(struct file *f, struct page *pg)
|
|
+{
|
|
+ return yaffs_readpage_unlock(f, pg);
|
|
+}
|
|
+
|
|
+/* writepage inspired by/stolen from smbfs */
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
|
|
+#else
|
|
+static int yaffs_writepage(struct page *page)
|
|
+#endif
|
|
+{
|
|
+ struct address_space *mapping = page->mapping;
|
|
+ loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
|
|
+ struct inode *inode;
|
|
+ unsigned long end_index;
|
|
+ char *buffer;
|
|
+ yaffs_Object *obj;
|
|
+ int nWritten = 0;
|
|
+ unsigned nBytes;
|
|
+
|
|
+ if (!mapping)
|
|
+ BUG();
|
|
+ inode = mapping->host;
|
|
+ if (!inode)
|
|
+ BUG();
|
|
+
|
|
+ if (offset > inode->i_size) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG
|
|
+ "yaffs_writepage at %08x, inode size = %08x!!!\n",
|
|
+ (unsigned)(page->index << PAGE_CACHE_SHIFT),
|
|
+ (unsigned)inode->i_size));
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG " -> don't care!!\n"));
|
|
+ unlock_page(page);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ end_index = inode->i_size >> PAGE_CACHE_SHIFT;
|
|
+
|
|
+ /* easy case */
|
|
+ if (page->index < end_index) {
|
|
+ nBytes = PAGE_CACHE_SIZE;
|
|
+ } else {
|
|
+ nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
|
|
+ }
|
|
+
|
|
+ get_page(page);
|
|
+
|
|
+ buffer = kmap(page);
|
|
+
|
|
+ obj = yaffs_InodeToObject(inode);
|
|
+ yaffs_GrossLock(obj->myDev);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
|
|
+ (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
|
|
+ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
|
|
+
|
|
+ nWritten =
|
|
+ yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
|
|
+ nBytes, 0);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
|
|
+ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
|
|
+
|
|
+ yaffs_GrossUnlock(obj->myDev);
|
|
+
|
|
+ kunmap(page);
|
|
+ SetPageUptodate(page);
|
|
+ UnlockPage(page);
|
|
+ put_page(page);
|
|
+
|
|
+ return (nWritten == nBytes) ? 0 : -ENOSPC;
|
|
+}
|
|
+
|
|
+static int yaffs_prepare_write(struct file *f, struct page *pg,
|
|
+ unsigned offset, unsigned to)
|
|
+{
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_prepair_write\n"));
|
|
+ if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
|
|
+ return yaffs_readpage_nolock(f, pg);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
|
|
+ unsigned to)
|
|
+{
|
|
+
|
|
+ void *addr = page_address(pg) + offset;
|
|
+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
|
|
+ int nBytes = to - offset;
|
|
+ int nWritten;
|
|
+
|
|
+ unsigned spos = pos;
|
|
+ unsigned saddr = (unsigned)addr;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
|
|
+ spos, nBytes));
|
|
+
|
|
+ nWritten = yaffs_file_write(f, addr, nBytes, &pos);
|
|
+
|
|
+ if (nWritten != nBytes) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG
|
|
+ "yaffs_commit_write not same size nWritten %d nBytes %d\n",
|
|
+ nWritten, nBytes));
|
|
+ SetPageError(pg);
|
|
+ ClearPageUptodate(pg);
|
|
+ } else {
|
|
+ SetPageUptodate(pg);
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_commit_write returning %d\n",
|
|
+ nWritten == nBytes ? 0 : nWritten));
|
|
+
|
|
+ return nWritten == nBytes ? 0 : nWritten;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
|
|
+{
|
|
+ if (inode && obj) {
|
|
+
|
|
+
|
|
+ /* Check mode against the variant type and attempt to repair if broken. */
|
|
+ __u32 mode = obj->yst_mode;
|
|
+ switch( obj->variantType ){
|
|
+ case YAFFS_OBJECT_TYPE_FILE :
|
|
+ if( ! S_ISREG(mode) ){
|
|
+ obj->yst_mode &= ~S_IFMT;
|
|
+ obj->yst_mode |= S_IFREG;
|
|
+ }
|
|
+
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK :
|
|
+ if( ! S_ISLNK(mode) ){
|
|
+ obj->yst_mode &= ~S_IFMT;
|
|
+ obj->yst_mode |= S_IFLNK;
|
|
+ }
|
|
+
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY :
|
|
+ if( ! S_ISDIR(mode) ){
|
|
+ obj->yst_mode &= ~S_IFMT;
|
|
+ obj->yst_mode |= S_IFDIR;
|
|
+ }
|
|
+
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN :
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK :
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL :
|
|
+ default:
|
|
+ /* TODO? */
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ inode->i_ino = obj->objectId;
|
|
+ inode->i_mode = obj->yst_mode;
|
|
+ inode->i_uid = obj->yst_uid;
|
|
+ inode->i_gid = obj->yst_gid;
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
|
|
+ inode->i_blksize = inode->i_sb->s_blocksize;
|
|
+#endif
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+
|
|
+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
|
|
+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
|
|
+ inode->i_atime.tv_nsec = 0;
|
|
+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
|
|
+ inode->i_mtime.tv_nsec = 0;
|
|
+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
|
|
+ inode->i_ctime.tv_nsec = 0;
|
|
+#else
|
|
+ inode->i_rdev = obj->yst_rdev;
|
|
+ inode->i_atime = obj->yst_atime;
|
|
+ inode->i_mtime = obj->yst_mtime;
|
|
+ inode->i_ctime = obj->yst_ctime;
|
|
+#endif
|
|
+ inode->i_size = yaffs_GetObjectFileLength(obj);
|
|
+ inode->i_blocks = (inode->i_size + 511) >> 9;
|
|
+
|
|
+ inode->i_nlink = yaffs_GetObjectLinkCount(obj);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG
|
|
+ "yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
|
|
+ inode->i_mode, inode->i_uid, inode->i_gid,
|
|
+ (int)inode->i_size, atomic_read(&inode->i_count)));
|
|
+
|
|
+ switch (obj->yst_mode & S_IFMT) {
|
|
+ default: /* fifo, device or socket */
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+ init_special_inode(inode, obj->yst_mode,
|
|
+ old_decode_dev(obj->yst_rdev));
|
|
+#else
|
|
+ init_special_inode(inode, obj->yst_mode,
|
|
+ (dev_t) (obj->yst_rdev));
|
|
+#endif
|
|
+ break;
|
|
+ case S_IFREG: /* file */
|
|
+ inode->i_op = &yaffs_file_inode_operations;
|
|
+ inode->i_fop = &yaffs_file_operations;
|
|
+ inode->i_mapping->a_ops =
|
|
+ &yaffs_file_address_operations;
|
|
+ break;
|
|
+ case S_IFDIR: /* directory */
|
|
+ inode->i_op = &yaffs_dir_inode_operations;
|
|
+ inode->i_fop = &yaffs_dir_operations;
|
|
+ break;
|
|
+ case S_IFLNK: /* symlink */
|
|
+ inode->i_op = &yaffs_symlink_inode_operations;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ yaffs_InodeToObjectLV(inode) = obj;
|
|
+
|
|
+ obj->myInode = inode;
|
|
+
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_FileInode invalid parameters\n"));
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
|
|
+ yaffs_Object * obj)
|
|
+{
|
|
+ struct inode *inode;
|
|
+
|
|
+ if (!sb) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_get_inode for NULL super_block!!\n"));
|
|
+ return NULL;
|
|
+
|
|
+ }
|
|
+
|
|
+ if (!obj) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_get_inode for NULL object!!\n"));
|
|
+ return NULL;
|
|
+
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_get_inode for object %d\n", obj->objectId));
|
|
+
|
|
+ inode = iget(sb, obj->objectId);
|
|
+
|
|
+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
|
|
+ /* iget also increments the inode's i_count */
|
|
+ /* NB You can't be holding grossLock or deadlock will happen! */
|
|
+
|
|
+ return inode;
|
|
+}
|
|
+
|
|
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
|
|
+ loff_t * pos)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ int nWritten, ipos;
|
|
+ struct inode *inode;
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ obj = yaffs_DentryToObject(f->f_dentry);
|
|
+
|
|
+ dev = obj->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ inode = f->f_dentry->d_inode;
|
|
+
|
|
+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) {
|
|
+ ipos = inode->i_size;
|
|
+ } else {
|
|
+ ipos = *pos;
|
|
+ }
|
|
+
|
|
+ if (!obj) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_file_write: hey obj is null!\n"));
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG
|
|
+ "yaffs_file_write about to write writing %d bytes"
|
|
+ "to object %d at %d\n",
|
|
+ n, obj->objectId, ipos));
|
|
+ }
|
|
+
|
|
+ nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_file_write writing %d bytes, %d written at %d\n",
|
|
+ n, nWritten, ipos));
|
|
+ if (nWritten > 0) {
|
|
+ ipos += nWritten;
|
|
+ *pos = ipos;
|
|
+ if (ipos > inode->i_size) {
|
|
+ inode->i_size = ipos;
|
|
+ inode->i_blocks = (ipos + 511) >> 9;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG
|
|
+ "yaffs_file_write size updated to %d bytes, "
|
|
+ "%d blocks\n",
|
|
+ ipos, (int)(inode->i_blocks)));
|
|
+ }
|
|
+
|
|
+ }
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ return nWritten == 0 ? -ENOSPC : nWritten;
|
|
+}
|
|
+
|
|
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_Device *dev;
|
|
+ struct inode *inode = f->f_dentry->d_inode;
|
|
+ unsigned long offset, curoffs;
|
|
+ struct list_head *i;
|
|
+ yaffs_Object *l;
|
|
+
|
|
+ char name[YAFFS_MAX_NAME_LENGTH + 1];
|
|
+
|
|
+ obj = yaffs_DentryToObject(f->f_dentry);
|
|
+ dev = obj->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ offset = f->f_pos;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
|
|
+
|
|
+ if (offset == 0) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_readdir: entry . ino %d \n",
|
|
+ (int)inode->i_ino));
|
|
+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR)
|
|
+ < 0) {
|
|
+ goto out;
|
|
+ }
|
|
+ offset++;
|
|
+ f->f_pos++;
|
|
+ }
|
|
+ if (offset == 1) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_readdir: entry .. ino %d \n",
|
|
+ (int)f->f_dentry->d_parent->d_inode->i_ino));
|
|
+ if (filldir
|
|
+ (dirent, "..", 2, offset,
|
|
+ f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
|
|
+ goto out;
|
|
+ }
|
|
+ offset++;
|
|
+ f->f_pos++;
|
|
+ }
|
|
+
|
|
+ curoffs = 1;
|
|
+
|
|
+ /* If the directory has changed since the open or last call to
|
|
+ readdir, rewind to after the 2 canned entries. */
|
|
+
|
|
+ if (f->f_version != inode->i_version) {
|
|
+ offset = 2;
|
|
+ f->f_pos = offset;
|
|
+ f->f_version = inode->i_version;
|
|
+ }
|
|
+
|
|
+ list_for_each(i, &obj->variant.directoryVariant.children) {
|
|
+ curoffs++;
|
|
+ if (curoffs >= offset) {
|
|
+ l = list_entry(i, yaffs_Object, siblings);
|
|
+
|
|
+ yaffs_GetObjectName(l, name,
|
|
+ YAFFS_MAX_NAME_LENGTH + 1);
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_readdir: %s inode %d\n", name,
|
|
+ yaffs_GetObjectInode(l)));
|
|
+
|
|
+ if (filldir(dirent,
|
|
+ name,
|
|
+ strlen(name),
|
|
+ offset,
|
|
+ yaffs_GetObjectInode(l),
|
|
+ yaffs_GetObjectType(l))
|
|
+ < 0) {
|
|
+ goto up_and_out;
|
|
+ }
|
|
+
|
|
+ offset++;
|
|
+ f->f_pos++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ up_and_out:
|
|
+ out:
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * File creation. Allocate an inode, and we're done..
|
|
+ */
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
|
|
+ dev_t rdev)
|
|
+#else
|
|
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
|
|
+ int rdev)
|
|
+#endif
|
|
+{
|
|
+ struct inode *inode;
|
|
+
|
|
+ yaffs_Object *obj = NULL;
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ yaffs_Object *parent = yaffs_InodeToObject(dir);
|
|
+
|
|
+ int error = -ENOSPC;
|
|
+ uid_t uid = current->fsuid;
|
|
+ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
|
|
+
|
|
+ if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
|
|
+ mode |= S_ISGID;
|
|
+
|
|
+ if (parent) {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_mknod: parent object %d type %d\n",
|
|
+ parent->objectId, parent->variantType));
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_mknod: could not get parent object\n"));
|
|
+ return -EPERM;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
|
|
+ "mode %x dev %x\n",
|
|
+ dentry->d_name.name, mode, rdev));
|
|
+
|
|
+ dev = parent->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ switch (mode & S_IFMT) {
|
|
+ default:
|
|
+ /* Special (socket, fifo, device...) */
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG
|
|
+ "yaffs_mknod: making special\n"));
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+ obj =
|
|
+ yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
|
|
+ gid, old_encode_dev(rdev));
|
|
+#else
|
|
+ obj =
|
|
+ yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
|
|
+ gid, rdev);
|
|
+#endif
|
|
+ break;
|
|
+ case S_IFREG: /* file */
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
|
|
+ obj =
|
|
+ yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
|
|
+ gid);
|
|
+ break;
|
|
+ case S_IFDIR: /* directory */
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_mknod: making directory\n"));
|
|
+ obj =
|
|
+ yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
|
|
+ uid, gid);
|
|
+ break;
|
|
+ case S_IFLNK: /* symlink */
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
|
|
+ obj = NULL; /* Do we ever get here? */
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ /* Can not call yaffs_get_inode() with gross lock held */
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (obj) {
|
|
+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
|
|
+ d_instantiate(dentry, inode);
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_mknod created object %d count = %d\n",
|
|
+ obj->objectId, atomic_read(&inode->i_count)));
|
|
+ error = 0;
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_mknod failed making object\n"));
|
|
+ error = -ENOMEM;
|
|
+ }
|
|
+
|
|
+ return error;
|
|
+}
|
|
+
|
|
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
|
|
+{
|
|
+ int retVal;
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mkdir\n"));
|
|
+ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
|
|
+#if 0
|
|
+ /* attempt to fix dir bug - didn't work */
|
|
+ if (!retVal) {
|
|
+ dget(dentry);
|
|
+ }
|
|
+#endif
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
|
|
+ struct nameidata *n)
|
|
+#else
|
|
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
|
|
+#endif
|
|
+{
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_create\n"));
|
|
+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
|
|
+}
|
|
+
|
|
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
|
|
+{
|
|
+ int retVal;
|
|
+
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
|
|
+ dentry->d_name.name));
|
|
+
|
|
+ dev = yaffs_InodeToObject(dir)->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
|
|
+
|
|
+ if (retVal == YAFFS_OK) {
|
|
+ dentry->d_inode->i_nlink--;
|
|
+ dir->i_version++;
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ mark_inode_dirty(dentry->d_inode);
|
|
+ return 0;
|
|
+ }
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ return -ENOTEMPTY;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Create a link...
|
|
+ */
|
|
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
|
|
+ struct dentry *dentry)
|
|
+{
|
|
+ struct inode *inode = old_dentry->d_inode;
|
|
+ yaffs_Object *obj = NULL;
|
|
+ yaffs_Object *link = NULL;
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_link\n"));
|
|
+
|
|
+ obj = yaffs_InodeToObject(inode);
|
|
+ dev = obj->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
|
|
+ {
|
|
+ link =
|
|
+ yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
|
|
+ obj);
|
|
+ }
|
|
+
|
|
+ if (link) {
|
|
+ old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
|
|
+ d_instantiate(dentry, old_dentry->d_inode);
|
|
+ atomic_inc(&old_dentry->d_inode->i_count);
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_link link count %d i_count %d\n",
|
|
+ old_dentry->d_inode->i_nlink,
|
|
+ atomic_read(&old_dentry->d_inode->i_count)));
|
|
+
|
|
+ }
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (link) {
|
|
+
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ return -EPERM;
|
|
+}
|
|
+
|
|
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
|
|
+ const char *symname)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_Device *dev;
|
|
+ uid_t uid = current->fsuid;
|
|
+ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_symlink\n"));
|
|
+
|
|
+ dev = yaffs_InodeToObject(dir)->myDev;
|
|
+ yaffs_GrossLock(dev);
|
|
+ obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
|
|
+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (obj) {
|
|
+
|
|
+ struct inode *inode;
|
|
+
|
|
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
|
|
+ d_instantiate(dentry, inode);
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink created OK\n"));
|
|
+ return 0;
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink not created\n"));
|
|
+
|
|
+ }
|
|
+
|
|
+ return -ENOMEM;
|
|
+}
|
|
+
|
|
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
|
|
+ int datasync)
|
|
+{
|
|
+
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ obj = yaffs_DentryToObject(dentry);
|
|
+
|
|
+ dev = obj->myDev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_object\n"));
|
|
+ yaffs_GrossLock(dev);
|
|
+ yaffs_FlushFile(obj, 1);
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * The VFS layer already does all the dentry stuff for rename.
|
|
+ *
|
|
+ * NB: POSIX says you can rename an object over an old object of the same name
|
|
+ */
|
|
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
+ struct inode *new_dir, struct dentry *new_dentry)
|
|
+{
|
|
+ yaffs_Device *dev;
|
|
+ int retVal = YAFFS_FAIL;
|
|
+ yaffs_Object *target;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
|
|
+ dev = yaffs_InodeToObject(old_dir)->myDev;
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ /* Check if the target is an existing directory that is not empty. */
|
|
+ target =
|
|
+ yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
|
|
+ new_dentry->d_name.name);
|
|
+
|
|
+
|
|
+
|
|
+ if (target &&
|
|
+ target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
|
|
+ !list_empty(&target->variant.directoryVariant.children)) {
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
|
|
+
|
|
+ retVal = YAFFS_FAIL;
|
|
+ } else {
|
|
+
|
|
+ /* Now does unlinking internally using shadowing mechanism */
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
|
|
+
|
|
+ retVal =
|
|
+ yaffs_RenameObject(yaffs_InodeToObject(old_dir),
|
|
+ old_dentry->d_name.name,
|
|
+ yaffs_InodeToObject(new_dir),
|
|
+ new_dentry->d_name.name);
|
|
+
|
|
+ }
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ if (retVal == YAFFS_OK) {
|
|
+ if(target) {
|
|
+ new_dentry->d_inode->i_nlink--;
|
|
+ mark_inode_dirty(new_dentry->d_inode);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+ } else {
|
|
+ return -ENOTEMPTY;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
|
|
+{
|
|
+ struct inode *inode = dentry->d_inode;
|
|
+ int error;
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_setattr of object %d\n",
|
|
+ yaffs_InodeToObject(inode)->objectId));
|
|
+
|
|
+ if ((error = inode_change_ok(inode, attr)) == 0) {
|
|
+
|
|
+ dev = yaffs_InodeToObject(inode)->myDev;
|
|
+ yaffs_GrossLock(dev);
|
|
+ if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
|
|
+ YAFFS_OK) {
|
|
+ error = 0;
|
|
+ } else {
|
|
+ error = -EPERM;
|
|
+ }
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ if (!error)
|
|
+ error = inode_setattr(inode, attr);
|
|
+ }
|
|
+ return error;
|
|
+}
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
+{
|
|
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
|
|
+ struct super_block *sb = dentry->d_sb;
|
|
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
|
|
+{
|
|
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
|
|
+#else
|
|
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
|
|
+{
|
|
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
|
|
+#endif
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_statfs\n"));
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ buf->f_type = YAFFS_MAGIC;
|
|
+ buf->f_bsize = sb->s_blocksize;
|
|
+ buf->f_namelen = 255;
|
|
+ if (sb->s_blocksize > dev->nDataBytesPerChunk) {
|
|
+
|
|
+ buf->f_blocks =
|
|
+ (dev->endBlock - dev->startBlock +
|
|
+ 1) * dev->nChunksPerBlock / (sb->s_blocksize /
|
|
+ dev->nDataBytesPerChunk);
|
|
+ buf->f_bfree =
|
|
+ yaffs_GetNumberOfFreeChunks(dev) / (sb->s_blocksize /
|
|
+ dev->nDataBytesPerChunk);
|
|
+ } else {
|
|
+
|
|
+ buf->f_blocks =
|
|
+ (dev->endBlock - dev->startBlock +
|
|
+ 1) * dev->nChunksPerBlock * (dev->nDataBytesPerChunk /
|
|
+ sb->s_blocksize);
|
|
+ buf->f_bfree =
|
|
+ yaffs_GetNumberOfFreeChunks(dev) * (dev->nDataBytesPerChunk /
|
|
+ sb->s_blocksize);
|
|
+ }
|
|
+ buf->f_files = 0;
|
|
+ buf->f_ffree = 0;
|
|
+ buf->f_bavail = buf->f_bfree;
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+/**
|
|
+static int yaffs_do_sync_fs(struct super_block *sb)
|
|
+{
|
|
+
|
|
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
|
|
+
|
|
+ if(sb->s_dirt) {
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ if(dev)
|
|
+ yaffs_CheckpointSave(dev);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ sb->s_dirt = 0;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+**/
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static void yaffs_write_super(struct super_block *sb)
|
|
+#else
|
|
+static int yaffs_write_super(struct super_block *sb)
|
|
+#endif
|
|
+{
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
|
|
+ return 0; /* yaffs_do_sync_fs(sb);*/
|
|
+#endif
|
|
+}
|
|
+
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_sync_fs(struct super_block *sb, int wait)
|
|
+#else
|
|
+static int yaffs_sync_fs(struct super_block *sb)
|
|
+#endif
|
|
+{
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
|
|
+
|
|
+ return 0; /* yaffs_do_sync_fs(sb);*/
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_read_inode(struct inode *inode)
|
|
+{
|
|
+ /* NB This is called as a side effect of other functions, but
|
|
+ * we had to release the lock to prevent deadlocks, so
|
|
+ * need to lock again.
|
|
+ */
|
|
+
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino));
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
|
|
+
|
|
+ yaffs_FillInodeFromObject(inode, obj);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+}
|
|
+
|
|
+static LIST_HEAD(yaffs_dev_list);
|
|
+
|
|
+static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
|
|
+{
|
|
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
|
|
+
|
|
+ if( *flags & MS_RDONLY ) {
|
|
+ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ yaffs_FlushEntireDeviceCache(dev);
|
|
+
|
|
+ yaffs_CheckpointSave(dev);
|
|
+
|
|
+ if (mtd->sync)
|
|
+ mtd->sync(mtd);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+ }
|
|
+ else {
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void yaffs_put_super(struct super_block *sb)
|
|
+{
|
|
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ yaffs_FlushEntireDeviceCache(dev);
|
|
+
|
|
+ yaffs_CheckpointSave(dev);
|
|
+
|
|
+ if (dev->putSuperFunc) {
|
|
+ dev->putSuperFunc(sb);
|
|
+ }
|
|
+
|
|
+ yaffs_Deinitialise(dev);
|
|
+
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ /* we assume this is protected by lock_kernel() in mount/umount */
|
|
+ list_del(&dev->devList);
|
|
+
|
|
+ if(dev->spareBuffer){
|
|
+ YFREE(dev->spareBuffer);
|
|
+ dev->spareBuffer = NULL;
|
|
+ }
|
|
+
|
|
+ kfree(dev);
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_MTDPutSuper(struct super_block *sb)
|
|
+{
|
|
+
|
|
+ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
|
|
+
|
|
+ if (mtd->sync) {
|
|
+ mtd->sync(mtd);
|
|
+ }
|
|
+
|
|
+ put_mtd_device(mtd);
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_MarkSuperBlockDirty(void *vsb)
|
|
+{
|
|
+ struct super_block *sb = (struct super_block *)vsb;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
|
|
+// if(sb)
|
|
+// sb->s_dirt = 1;
|
|
+}
|
|
+
|
|
+typedef struct {
|
|
+ int inband_tags;
|
|
+ int skip_checkpoint_read;
|
|
+ int skip_checkpoint_write;
|
|
+ int no_cache;
|
|
+} yaffs_options;
|
|
+
|
|
+#define MAX_OPT_LEN 20
|
|
+static int yaffs_parse_options(yaffs_options *options, const char *options_str)
|
|
+{
|
|
+ char cur_opt[MAX_OPT_LEN+1];
|
|
+ int p;
|
|
+ int error = 0;
|
|
+
|
|
+ /* Parse through the options which is a comma seperated list */
|
|
+
|
|
+ while(options_str && *options_str && !error){
|
|
+ memset(cur_opt,0,MAX_OPT_LEN+1);
|
|
+ p = 0;
|
|
+
|
|
+ while(*options_str && *options_str != ','){
|
|
+ if(p < MAX_OPT_LEN){
|
|
+ cur_opt[p] = *options_str;
|
|
+ p++;
|
|
+ }
|
|
+ options_str++;
|
|
+ }
|
|
+
|
|
+ if(!strcmp(cur_opt,"inband-tags"))
|
|
+ options->inband_tags = 1;
|
|
+ else if(!strcmp(cur_opt,"no-cache"))
|
|
+ options->no_cache = 1;
|
|
+ else if(!strcmp(cur_opt,"no-checkpoint-read"))
|
|
+ options->skip_checkpoint_read = 1;
|
|
+ else if(!strcmp(cur_opt,"no-checkpoint-write"))
|
|
+ options->skip_checkpoint_write = 1;
|
|
+ else if(!strcmp(cur_opt,"no-checkpoint")){
|
|
+ options->skip_checkpoint_read = 1;
|
|
+ options->skip_checkpoint_write = 1;
|
|
+ } else {
|
|
+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
|
|
+ error = 1;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return error;
|
|
+}
|
|
+
|
|
+static struct super_block *yaffs_internal_read_super(int yaffsVersion,
|
|
+ struct super_block *sb,
|
|
+ void *data, int silent)
|
|
+{
|
|
+ int nBlocks;
|
|
+ struct inode *inode = NULL;
|
|
+ struct dentry *root;
|
|
+ yaffs_Device *dev = 0;
|
|
+ char devname_buf[BDEVNAME_SIZE + 1];
|
|
+ struct mtd_info *mtd;
|
|
+ int err;
|
|
+ char *data_str = (char *)data;
|
|
+
|
|
+ yaffs_options options;
|
|
+
|
|
+ sb->s_magic = YAFFS_MAGIC;
|
|
+ sb->s_op = &yaffs_super_ops;
|
|
+
|
|
+ if (!sb)
|
|
+ printk(KERN_INFO "yaffs: sb is NULL\n");
|
|
+ else if (!sb->s_dev)
|
|
+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
|
|
+ else if (!yaffs_devname(sb, devname_buf))
|
|
+ printk(KERN_INFO "yaffs: devname is NULL\n");
|
|
+ else
|
|
+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
|
|
+ sb->s_dev,
|
|
+ yaffs_devname(sb, devname_buf));
|
|
+
|
|
+ if(!data_str)
|
|
+ data_str = "";
|
|
+
|
|
+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
|
|
+
|
|
+ memset(&options,0,sizeof(options));
|
|
+
|
|
+ if(yaffs_parse_options(&options,data_str)){
|
|
+ /* Option parsing failed */
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+
|
|
+ sb->s_blocksize = PAGE_CACHE_SIZE;
|
|
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
|
|
+ T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
|
|
+
|
|
+#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ ("yaffs: Write verification disabled. All guarantees "
|
|
+ "null and void\n"));
|
|
+#endif
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
|
|
+ "\"%s\"\n",
|
|
+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
|
|
+ yaffs_devname(sb, devname_buf)));
|
|
+
|
|
+ /* Check it's an mtd device..... */
|
|
+ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
|
|
+ return NULL; /* This isn't an mtd device */
|
|
+ }
|
|
+ /* Get the device */
|
|
+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
|
|
+ if (!mtd) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs: MTD device #%u doesn't appear to exist\n",
|
|
+ MINOR(sb->s_dev)));
|
|
+ return NULL;
|
|
+ }
|
|
+ /* Check it's NAND */
|
|
+ if (mtd->type != MTD_NANDFLASH) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
|
|
+ T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
|
|
+ T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
|
|
+ T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
|
|
+ T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
|
|
+ T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
|
|
+ T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
|
|
+ T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
|
|
+ T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
|
|
+ T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
|
|
+ T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
|
|
+
|
|
+#ifdef CONFIG_YAFFS_AUTO_YAFFS2
|
|
+
|
|
+ if (yaffsVersion == 1 &&
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ mtd->writesize >= 2048) {
|
|
+#else
|
|
+ mtd->oobblock >= 2048) {
|
|
+#endif
|
|
+ T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
|
|
+ yaffsVersion = 2;
|
|
+ }
|
|
+
|
|
+ /* Added NCB 26/5/2006 for completeness */
|
|
+ if (yaffsVersion == 2 &&
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ mtd->writesize == 512) {
|
|
+#else
|
|
+ mtd->oobblock == 512) {
|
|
+#endif
|
|
+ T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
|
|
+ yaffsVersion = 1;
|
|
+ }
|
|
+
|
|
+#endif
|
|
+
|
|
+ if (yaffsVersion == 2) {
|
|
+ /* Check for version 2 style functions */
|
|
+ if (!mtd->erase ||
|
|
+ !mtd->block_isbad ||
|
|
+ !mtd->block_markbad ||
|
|
+ !mtd->read ||
|
|
+ !mtd->write ||
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ !mtd->read_oob || !mtd->write_oob) {
|
|
+#else
|
|
+ !mtd->write_ecc ||
|
|
+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
|
|
+#endif
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs: MTD device does not support required "
|
|
+ "functions\n"));;
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ if (mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
|
|
+#else
|
|
+ if (mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
|
|
+#endif
|
|
+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs: MTD device does not have the "
|
|
+ "right page sizes\n"));
|
|
+ return NULL;
|
|
+ }
|
|
+ } else {
|
|
+ /* Check for V1 style functions */
|
|
+ if (!mtd->erase ||
|
|
+ !mtd->read ||
|
|
+ !mtd->write ||
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ !mtd->read_oob || !mtd->write_oob) {
|
|
+#else
|
|
+ !mtd->write_ecc ||
|
|
+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
|
|
+#endif
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs: MTD device does not support required "
|
|
+ "functions\n"));;
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
|
|
+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs: MTD device does not support have the "
|
|
+ "right page sizes\n"));
|
|
+ return NULL;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* OK, so if we got here, we have an MTD that's NAND and looks
|
|
+ * like it has the right capabilities
|
|
+ * Set the yaffs_Device up for mtd
|
|
+ */
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+ sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
|
|
+#else
|
|
+ sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
|
|
+#endif
|
|
+ if (!dev) {
|
|
+ /* Deep shit could not allocate device structure */
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs_read_super: Failed trying to allocate "
|
|
+ "yaffs_Device. \n"));
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ memset(dev, 0, sizeof(yaffs_Device));
|
|
+ dev->genericDevice = mtd;
|
|
+ dev->name = mtd->name;
|
|
+
|
|
+ /* Set up the memory size parameters.... */
|
|
+
|
|
+ nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
|
|
+ dev->startBlock = 0;
|
|
+ dev->endBlock = nBlocks - 1;
|
|
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
|
|
+ dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
|
|
+ dev->nReservedBlocks = 5;
|
|
+ dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
|
|
+
|
|
+ /* ... and the functions. */
|
|
+ if (yaffsVersion == 2) {
|
|
+ dev->writeChunkWithTagsToNAND =
|
|
+ nandmtd2_WriteChunkWithTagsToNAND;
|
|
+ dev->readChunkWithTagsFromNAND =
|
|
+ nandmtd2_ReadChunkWithTagsFromNAND;
|
|
+ dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
|
|
+ dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
|
|
+ dev->spareBuffer = YMALLOC(mtd->oobsize);
|
|
+ dev->isYaffs2 = 1;
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ dev->nDataBytesPerChunk = mtd->writesize;
|
|
+ dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
|
|
+#else
|
|
+ dev->nDataBytesPerChunk = mtd->oobblock;
|
|
+ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
|
|
+#endif
|
|
+ nBlocks = mtd->size / mtd->erasesize;
|
|
+
|
|
+ dev->nCheckpointReservedBlocks = CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS;
|
|
+ dev->startBlock = 0;
|
|
+ dev->endBlock = nBlocks - 1;
|
|
+ } else {
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ /* use the MTD interface in yaffs_mtdif1.c */
|
|
+ dev->writeChunkWithTagsToNAND =
|
|
+ nandmtd1_WriteChunkWithTagsToNAND;
|
|
+ dev->readChunkWithTagsFromNAND =
|
|
+ nandmtd1_ReadChunkWithTagsFromNAND;
|
|
+ dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
|
|
+ dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
|
|
+#else
|
|
+ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
|
|
+ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
|
|
+#endif
|
|
+ dev->isYaffs2 = 0;
|
|
+ }
|
|
+ /* ... and common functions */
|
|
+ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
|
|
+ dev->initialiseNAND = nandmtd_InitialiseNAND;
|
|
+
|
|
+ dev->putSuperFunc = yaffs_MTDPutSuper;
|
|
+
|
|
+ dev->superBlock = (void *)sb;
|
|
+ dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
|
|
+
|
|
+
|
|
+#ifndef CONFIG_YAFFS_DOES_ECC
|
|
+ dev->useNANDECC = 1;
|
|
+#endif
|
|
+
|
|
+#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
|
|
+ dev->wideTnodesDisabled = 1;
|
|
+#endif
|
|
+
|
|
+ dev->skipCheckpointRead = options.skip_checkpoint_read;
|
|
+ dev->skipCheckpointWrite = options.skip_checkpoint_write;
|
|
+
|
|
+ /* we assume this is protected by lock_kernel() in mount/umount */
|
|
+ list_add_tail(&dev->devList, &yaffs_dev_list);
|
|
+
|
|
+ init_MUTEX(&dev->grossLock);
|
|
+
|
|
+ yaffs_GrossLock(dev);
|
|
+
|
|
+ err = yaffs_GutsInitialise(dev);
|
|
+
|
|
+ T(YAFFS_TRACE_OS,
|
|
+ ("yaffs_read_super: guts initialised %s\n",
|
|
+ (err == YAFFS_OK) ? "OK" : "FAILED"));
|
|
+
|
|
+ /* Release lock before yaffs_get_inode() */
|
|
+ yaffs_GrossUnlock(dev);
|
|
+
|
|
+ /* Create root inode */
|
|
+ if (err == YAFFS_OK)
|
|
+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
|
|
+ yaffs_Root(dev));
|
|
+
|
|
+ if (!inode)
|
|
+ return NULL;
|
|
+
|
|
+ inode->i_op = &yaffs_dir_inode_operations;
|
|
+ inode->i_fop = &yaffs_dir_operations;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
|
|
+
|
|
+ root = d_alloc_root(inode);
|
|
+
|
|
+ T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
|
|
+
|
|
+ if (!root) {
|
|
+ iput(inode);
|
|
+ return NULL;
|
|
+ }
|
|
+ sb->s_root = root;
|
|
+
|
|
+ T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
|
|
+ return sb;
|
|
+}
|
|
+
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
|
|
+ int silent)
|
|
+{
|
|
+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
|
|
+}
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs_read_super(struct file_system_type *fs,
|
|
+ int flags, const char *dev_name,
|
|
+ void *data, struct vfsmount *mnt)
|
|
+{
|
|
+
|
|
+ return get_sb_bdev(fs, flags, dev_name, data,
|
|
+ yaffs_internal_read_super_mtd, mnt);
|
|
+}
|
|
+#else
|
|
+static struct super_block *yaffs_read_super(struct file_system_type *fs,
|
|
+ int flags, const char *dev_name,
|
|
+ void *data)
|
|
+{
|
|
+
|
|
+ return get_sb_bdev(fs, flags, dev_name, data,
|
|
+ yaffs_internal_read_super_mtd);
|
|
+}
|
|
+#endif
|
|
+
|
|
+static struct file_system_type yaffs_fs_type = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .name = "yaffs",
|
|
+ .get_sb = yaffs_read_super,
|
|
+ .kill_sb = kill_block_super,
|
|
+ .fs_flags = FS_REQUIRES_DEV,
|
|
+};
|
|
+#else
|
|
+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
|
|
+ int silent)
|
|
+{
|
|
+ return yaffs_internal_read_super(1, sb, data, silent);
|
|
+}
|
|
+
|
|
+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
|
|
+ FS_REQUIRES_DEV);
|
|
+#endif
|
|
+
|
|
+
|
|
+#ifdef CONFIG_YAFFS_YAFFS2
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
|
|
+ int silent)
|
|
+{
|
|
+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
|
|
+}
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static int yaffs2_read_super(struct file_system_type *fs,
|
|
+ int flags, const char *dev_name, void *data,
|
|
+ struct vfsmount *mnt)
|
|
+{
|
|
+ return get_sb_bdev(fs, flags, dev_name, data,
|
|
+ yaffs2_internal_read_super_mtd, mnt);
|
|
+}
|
|
+#else
|
|
+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
|
|
+ int flags, const char *dev_name,
|
|
+ void *data)
|
|
+{
|
|
+
|
|
+ return get_sb_bdev(fs, flags, dev_name, data,
|
|
+ yaffs2_internal_read_super_mtd);
|
|
+}
|
|
+#endif
|
|
+
|
|
+static struct file_system_type yaffs2_fs_type = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .name = "yaffs2",
|
|
+ .get_sb = yaffs2_read_super,
|
|
+ .kill_sb = kill_block_super,
|
|
+ .fs_flags = FS_REQUIRES_DEV,
|
|
+};
|
|
+#else
|
|
+static struct super_block *yaffs2_read_super(struct super_block *sb,
|
|
+ void *data, int silent)
|
|
+{
|
|
+ return yaffs_internal_read_super(2, sb, data, silent);
|
|
+}
|
|
+
|
|
+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
|
|
+ FS_REQUIRES_DEV);
|
|
+#endif
|
|
+
|
|
+#endif /* CONFIG_YAFFS_YAFFS2 */
|
|
+
|
|
+static struct proc_dir_entry *my_proc_entry;
|
|
+
|
|
+static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
|
|
+{
|
|
+ buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
|
|
+ buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
|
|
+ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
|
|
+ buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
|
|
+ buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
|
|
+ buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
|
|
+ buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
|
|
+ buf += sprintf(buf, "nCheckptResBlocks.. %d\n", dev->nCheckpointReservedBlocks);
|
|
+ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
|
|
+ buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
|
|
+ buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
|
|
+ buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
|
|
+ buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
|
|
+ buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
|
|
+ buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
|
|
+ buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
|
|
+ buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
|
|
+ buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
|
|
+ buf +=
|
|
+ sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
|
|
+ buf +=
|
|
+ sprintf(buf, "passiveGCs......... %d\n",
|
|
+ dev->passiveGarbageCollections);
|
|
+ buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
|
|
+ buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
|
|
+ buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
|
|
+ buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
|
|
+ buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
|
|
+ buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
|
|
+ buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
|
|
+ buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
|
|
+ buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
|
|
+ buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
|
|
+ buf +=
|
|
+ sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
|
|
+ buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
|
|
+ buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
|
|
+
|
|
+ return buf;
|
|
+}
|
|
+
|
|
+static int yaffs_proc_read(char *page,
|
|
+ char **start,
|
|
+ off_t offset, int count, int *eof, void *data)
|
|
+{
|
|
+ struct list_head *item;
|
|
+ char *buf = page;
|
|
+ int step = offset;
|
|
+ int n = 0;
|
|
+
|
|
+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
|
|
+ * We use 'offset' (*ppos) to indicate where we are in devList.
|
|
+ * This also assumes the user has posted a read buffer large
|
|
+ * enough to hold the complete output; but that's life in /proc.
|
|
+ */
|
|
+
|
|
+ *(int *)start = 1;
|
|
+
|
|
+ /* Print header first */
|
|
+ if (step == 0) {
|
|
+ buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
|
|
+ "\n%s\n%s\n", yaffs_fs_c_version,
|
|
+ yaffs_guts_c_version);
|
|
+ }
|
|
+
|
|
+ /* hold lock_kernel while traversing yaffs_dev_list */
|
|
+ lock_kernel();
|
|
+
|
|
+ /* Locate and print the Nth entry. Order N-squared but N is small. */
|
|
+ list_for_each(item, &yaffs_dev_list) {
|
|
+ yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
|
|
+ if (n < step) {
|
|
+ n++;
|
|
+ continue;
|
|
+ }
|
|
+ buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
|
|
+ buf = yaffs_dump_dev(buf, dev);
|
|
+ break;
|
|
+ }
|
|
+ unlock_kernel();
|
|
+
|
|
+ return buf - page < count ? buf - page : count;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * Set the verbosity of the warnings and error messages.
|
|
+ *
|
|
+ * Note that the names can only be a..z or _ with the current code.
|
|
+ */
|
|
+
|
|
+static struct {
|
|
+ char *mask_name;
|
|
+ unsigned mask_bitfield;
|
|
+} mask_flags[] = {
|
|
+ {"allocate", YAFFS_TRACE_ALLOCATE},
|
|
+ {"always", YAFFS_TRACE_ALWAYS},
|
|
+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
|
|
+ {"buffers", YAFFS_TRACE_BUFFERS},
|
|
+ {"bug", YAFFS_TRACE_BUG},
|
|
+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
|
|
+ {"deletion", YAFFS_TRACE_DELETION},
|
|
+ {"erase", YAFFS_TRACE_ERASE},
|
|
+ {"error", YAFFS_TRACE_ERROR},
|
|
+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
|
|
+ {"gc", YAFFS_TRACE_GC},
|
|
+ {"mtd", YAFFS_TRACE_MTD},
|
|
+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
|
|
+ {"os", YAFFS_TRACE_OS},
|
|
+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
|
|
+ {"scan", YAFFS_TRACE_SCAN},
|
|
+ {"tracing", YAFFS_TRACE_TRACING},
|
|
+
|
|
+ {"verify", YAFFS_TRACE_VERIFY},
|
|
+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
|
|
+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
|
|
+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
|
|
+
|
|
+ {"write", YAFFS_TRACE_WRITE},
|
|
+ {"all", 0xffffffff},
|
|
+ {"none", 0},
|
|
+ {NULL, 0},
|
|
+};
|
|
+
|
|
+#define MAX_MASK_NAME_LENGTH 40
|
|
+static int yaffs_proc_write(struct file *file, const char *buf,
|
|
+ unsigned long count, void *data)
|
|
+{
|
|
+ unsigned rg = 0, mask_bitfield;
|
|
+ char *end;
|
|
+ char *mask_name;
|
|
+ char *x;
|
|
+ char substring[MAX_MASK_NAME_LENGTH+1];
|
|
+ int i;
|
|
+ int done = 0;
|
|
+ int add, len = 0;
|
|
+ int pos = 0;
|
|
+
|
|
+ rg = yaffs_traceMask;
|
|
+
|
|
+ while (!done && (pos < count)) {
|
|
+ done = 1;
|
|
+ while ((pos < count) && isspace(buf[pos])) {
|
|
+ pos++;
|
|
+ }
|
|
+
|
|
+ switch (buf[pos]) {
|
|
+ case '+':
|
|
+ case '-':
|
|
+ case '=':
|
|
+ add = buf[pos];
|
|
+ pos++;
|
|
+ break;
|
|
+
|
|
+ default:
|
|
+ add = ' ';
|
|
+ break;
|
|
+ }
|
|
+ mask_name = NULL;
|
|
+
|
|
+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
|
|
+ if (end > buf + pos) {
|
|
+ mask_name = "numeral";
|
|
+ len = end - (buf + pos);
|
|
+ done = 0;
|
|
+ } else {
|
|
+ for(x = buf + pos, i = 0;
|
|
+ (*x == '_' || (*x >='a' && *x <= 'z')) &&
|
|
+ i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
|
|
+ substring[i] = *x;
|
|
+ substring[i] = '\0';
|
|
+
|
|
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
|
|
+ //len = strlen(mask_flags[i].mask_name);
|
|
+ //if (strncmp(buf + pos, mask_flags[i].mask_name, len) == 0) {
|
|
+ if(strcmp(substring,mask_flags[i].mask_name) == 0){
|
|
+ mask_name = mask_flags[i].mask_name;
|
|
+ mask_bitfield = mask_flags[i].mask_bitfield;
|
|
+ done = 0;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (mask_name != NULL) {
|
|
+ // pos += len;
|
|
+ done = 0;
|
|
+ switch(add) {
|
|
+ case '-':
|
|
+ rg &= ~mask_bitfield;
|
|
+ break;
|
|
+ case '+':
|
|
+ rg |= mask_bitfield;
|
|
+ break;
|
|
+ case '=':
|
|
+ rg = mask_bitfield;
|
|
+ break;
|
|
+ default:
|
|
+ rg |= mask_bitfield;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
|
|
+
|
|
+ printk("new trace = 0x%08X\n",yaffs_traceMask);
|
|
+
|
|
+ if (rg & YAFFS_TRACE_ALWAYS) {
|
|
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
|
|
+ char flag;
|
|
+ flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
|
|
+ printk("%c%s\n", flag, mask_flags[i].mask_name);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return count;
|
|
+}
|
|
+
|
|
+/* Stuff to handle installation of file systems */
|
|
+struct file_system_to_install {
|
|
+ struct file_system_type *fst;
|
|
+ int installed;
|
|
+};
|
|
+
|
|
+static struct file_system_to_install fs_to_install[] = {
|
|
+//#ifdef CONFIG_YAFFS_YAFFS1
|
|
+ {&yaffs_fs_type, 0},
|
|
+//#endif
|
|
+//#ifdef CONFIG_YAFFS_YAFFS2
|
|
+ {&yaffs2_fs_type, 0},
|
|
+//#endif
|
|
+ {NULL, 0}
|
|
+};
|
|
+
|
|
+static int __init init_yaffs_fs(void)
|
|
+{
|
|
+ int error = 0;
|
|
+ struct file_system_to_install *fsinst;
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
|
|
+
|
|
+ /* Install the proc_fs entry */
|
|
+ my_proc_entry = create_proc_entry("yaffs",
|
|
+ S_IRUGO | S_IFREG,
|
|
+ &proc_root);
|
|
+
|
|
+ if (my_proc_entry) {
|
|
+ my_proc_entry->write_proc = yaffs_proc_write;
|
|
+ my_proc_entry->read_proc = yaffs_proc_read;
|
|
+ my_proc_entry->data = NULL;
|
|
+ } else {
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ /* Now add the file system entries */
|
|
+
|
|
+ fsinst = fs_to_install;
|
|
+
|
|
+ while (fsinst->fst && !error) {
|
|
+ error = register_filesystem(fsinst->fst);
|
|
+ if (!error) {
|
|
+ fsinst->installed = 1;
|
|
+ }
|
|
+ fsinst++;
|
|
+ }
|
|
+
|
|
+ /* Any errors? uninstall */
|
|
+ if (error) {
|
|
+ fsinst = fs_to_install;
|
|
+
|
|
+ while (fsinst->fst) {
|
|
+ if (fsinst->installed) {
|
|
+ unregister_filesystem(fsinst->fst);
|
|
+ fsinst->installed = 0;
|
|
+ }
|
|
+ fsinst++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return error;
|
|
+}
|
|
+
|
|
+static void __exit exit_yaffs_fs(void)
|
|
+{
|
|
+
|
|
+ struct file_system_to_install *fsinst;
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
|
|
+ " removing. \n"));
|
|
+
|
|
+ remove_proc_entry("yaffs", &proc_root);
|
|
+
|
|
+ fsinst = fs_to_install;
|
|
+
|
|
+ while (fsinst->fst) {
|
|
+ if (fsinst->installed) {
|
|
+ unregister_filesystem(fsinst->fst);
|
|
+ fsinst->installed = 0;
|
|
+ }
|
|
+ fsinst++;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+module_init(init_yaffs_fs)
|
|
+module_exit(exit_yaffs_fs)
|
|
+
|
|
+MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
|
|
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
|
|
+MODULE_LICENSE("GPL");
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_guts.c linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.c
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--- linux-2.6.21.1/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.c 2007-06-08 14:07:26.000000000 +0200
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@@ -0,0 +1,7469 @@
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+/*
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+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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+ *
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+ * Copyright (C) 2002-2007 Aleph One Ltd.
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+ * for Toby Churchill Ltd and Brightstar Engineering
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+ *
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+ * Created by Charles Manning <charles@aleph1.co.uk>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+const char *yaffs_guts_c_version =
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+ "$Id: yaffs_guts.c,v 1.49 2007-05-15 20:07:40 charles Exp $";
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+
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+#include "yportenv.h"
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+
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+#include "yaffsinterface.h"
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+#include "yaffs_guts.h"
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+#include "yaffs_tagsvalidity.h"
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+
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+#include "yaffs_tagscompat.h"
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+#ifndef CONFIG_YAFFS_USE_OWN_SORT
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+#include "yaffs_qsort.h"
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+#endif
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+#include "yaffs_nand.h"
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+
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+#include "yaffs_checkptrw.h"
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+
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+#include "yaffs_nand.h"
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+#include "yaffs_packedtags2.h"
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+
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+
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+#ifdef CONFIG_YAFFS_WINCE
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+void yfsd_LockYAFFS(BOOL fsLockOnly);
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+void yfsd_UnlockYAFFS(BOOL fsLockOnly);
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+#endif
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+
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+#define YAFFS_PASSIVE_GC_CHUNKS 2
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+
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+#include "yaffs_ecc.h"
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+
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+
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+/* Robustification (if it ever comes about...) */
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+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND);
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+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk);
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+static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
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+ const __u8 * data,
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+ const yaffs_ExtendedTags * tags);
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+static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
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+ const yaffs_ExtendedTags * tags);
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+
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+/* Other local prototypes */
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+static int yaffs_UnlinkObject( yaffs_Object *obj);
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+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
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+
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+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
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+
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+static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev,
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+ const __u8 * buffer,
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+ yaffs_ExtendedTags * tags,
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+ int useReserve);
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+static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
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+ int chunkInNAND, int inScan);
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+
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+static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
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+ yaffs_ObjectType type);
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+static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
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+ yaffs_Object * obj);
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+static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name,
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+ int force, int isShrink, int shadows);
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+static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj);
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+static int yaffs_CheckStructures(void);
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+static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
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+ int chunkOffset, int *limit);
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+static int yaffs_DoGenericObjectDeletion(yaffs_Object * in);
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+
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+static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo);
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+
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+static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo);
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+static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
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+ int lineNo);
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+
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+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
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+ int chunkInNAND);
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+
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+static int yaffs_UnlinkWorker(yaffs_Object * obj);
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+static void yaffs_DestroyObject(yaffs_Object * obj);
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+
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+static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
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+ int chunkInObject);
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+
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+loff_t yaffs_GetFileSize(yaffs_Object * obj);
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+
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+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr);
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+
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+static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
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+
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+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
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+
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+#ifdef YAFFS_PARANOID
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+static int yaffs_CheckFileSanity(yaffs_Object * in);
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+#else
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+#define yaffs_CheckFileSanity(in)
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+#endif
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+
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+static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in);
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+static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId);
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+
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+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
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+
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+static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
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+ yaffs_ExtendedTags * tags);
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+
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+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
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+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
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+ yaffs_FileStructure * fStruct,
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+ __u32 chunkId);
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+
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+
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+/* Function to calculate chunk and offset */
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+
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+static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset)
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+{
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+ if(dev->chunkShift){
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+ /* Easy-peasy power of 2 case */
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+ *chunk = (__u32)(addr >> dev->chunkShift);
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+ *offset = (__u32)(addr & dev->chunkMask);
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+ }
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+ else if(dev->crumbsPerChunk)
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+ {
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+ /* Case where we're using "crumbs" */
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+ *offset = (__u32)(addr & dev->crumbMask);
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+ addr >>= dev->crumbShift;
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+ *chunk = ((__u32)addr)/dev->crumbsPerChunk;
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+ *offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift);
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+ }
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+ else
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+ YBUG();
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+}
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+
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+/* Function to return the number of shifts for a power of 2 greater than or equal
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+ * to the given number
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+ * Note we don't try to cater for all possible numbers and this does not have to
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+ * be hellishly efficient.
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+ */
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+
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+static __u32 ShiftsGE(__u32 x)
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+{
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+ int extraBits;
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+ int nShifts;
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+
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+ nShifts = extraBits = 0;
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+
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+ while(x>1){
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+ if(x & 1) extraBits++;
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+ x>>=1;
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+ nShifts++;
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+ }
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+
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+ if(extraBits)
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+ nShifts++;
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+
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+ return nShifts;
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+}
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+
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+/* Function to return the number of shifts to get a 1 in bit 0
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+ */
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+
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+static __u32 ShiftDiv(__u32 x)
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+{
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+ int nShifts;
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+
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+ nShifts = 0;
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+
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+ if(!x) return 0;
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+
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+ while( !(x&1)){
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+ x>>=1;
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+ nShifts++;
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+ }
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+
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+ return nShifts;
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+}
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+
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+
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+
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+/*
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+ * Temporary buffer manipulations.
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+ */
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+
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+static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
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+{
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+ int i;
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+ __u8 *buf = (__u8 *)1;
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+
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+ memset(dev->tempBuffer,0,sizeof(dev->tempBuffer));
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+
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+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
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+ dev->tempBuffer[i].line = 0; /* not in use */
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+ dev->tempBuffer[i].buffer = buf =
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+ YMALLOC_DMA(dev->nDataBytesPerChunk);
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+ }
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+
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+ return buf ? YAFFS_OK : YAFFS_FAIL;
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+
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+}
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+
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+static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
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+{
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+ int i, j;
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+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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+ if (dev->tempBuffer[i].line == 0) {
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+ dev->tempBuffer[i].line = lineNo;
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+ if ((i + 1) > dev->maxTemp) {
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+ dev->maxTemp = i + 1;
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+ for (j = 0; j <= i; j++)
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+ dev->tempBuffer[j].maxLine =
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+ dev->tempBuffer[j].line;
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+ }
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+
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+ return dev->tempBuffer[i].buffer;
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+ }
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+ }
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+
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+ T(YAFFS_TRACE_BUFFERS,
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+ (TSTR("Out of temp buffers at line %d, other held by lines:"),
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+ lineNo));
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+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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+ T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
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+ }
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+ T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
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+
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+ /*
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+ * If we got here then we have to allocate an unmanaged one
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+ * This is not good.
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+ */
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+
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+ dev->unmanagedTempAllocations++;
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+ return YMALLOC(dev->nDataBytesPerChunk);
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+
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+}
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+
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+static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
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+ int lineNo)
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+{
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+ int i;
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+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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+ if (dev->tempBuffer[i].buffer == buffer) {
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+ dev->tempBuffer[i].line = 0;
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+ return;
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+ }
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+ }
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+
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+ if (buffer) {
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+ /* assume it is an unmanaged one. */
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+ T(YAFFS_TRACE_BUFFERS,
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+ (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
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+ lineNo));
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+ YFREE(buffer);
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+ dev->unmanagedTempDeallocations++;
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+ }
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+
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+}
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+
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+/*
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+ * Determine if we have a managed buffer.
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+ */
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+int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer)
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+{
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+ int i;
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+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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+ if (dev->tempBuffer[i].buffer == buffer)
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+ return 1;
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+
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+ }
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+
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+ for (i = 0; i < dev->nShortOpCaches; i++) {
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+ if( dev->srCache[i].data == buffer )
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+ return 1;
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+
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+ }
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+
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+ if (buffer == dev->checkpointBuffer)
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+ return 1;
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+
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+ T(YAFFS_TRACE_ALWAYS,
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+ (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
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+ return 0;
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+}
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+
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+
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+
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+/*
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+ * Chunk bitmap manipulations
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+ */
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+
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+static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk)
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+{
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+ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
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+ T(YAFFS_TRACE_ERROR,
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+ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
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+ blk));
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+ YBUG();
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+ }
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+ return dev->chunkBits +
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+ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
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+}
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+
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+static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
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+{
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+ if(blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
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+ chunk < 0 || chunk >= dev->nChunksPerBlock) {
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+ T(YAFFS_TRACE_ERROR,
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+ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk));
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+ YBUG();
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+ }
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+}
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+
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+static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk)
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+{
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+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
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+
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+ memset(blkBits, 0, dev->chunkBitmapStride);
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+}
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+
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+static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk)
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+{
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+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
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+
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+ yaffs_VerifyChunkBitId(dev,blk,chunk);
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+
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+ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
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+}
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+
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+static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk)
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+{
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+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
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+
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+ yaffs_VerifyChunkBitId(dev,blk,chunk);
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+
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+ blkBits[chunk / 8] |= (1 << (chunk & 7));
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+}
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+
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+static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk)
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+{
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+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
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+ yaffs_VerifyChunkBitId(dev,blk,chunk);
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+
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+ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
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+}
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+
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+static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk)
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+{
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+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
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+ int i;
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+ for (i = 0; i < dev->chunkBitmapStride; i++) {
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+ if (*blkBits)
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+ return 1;
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+ blkBits++;
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+ }
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+ return 0;
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+}
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+
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+static int yaffs_CountChunkBits(yaffs_Device * dev, int blk)
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+{
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+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
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+ int i;
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+ int n = 0;
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+ for (i = 0; i < dev->chunkBitmapStride; i++) {
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+ __u8 x = *blkBits;
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+ while(x){
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+ if(x & 1)
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+ n++;
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+ x >>=1;
|
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+ }
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+
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+ blkBits++;
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+ }
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+ return n;
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+}
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+
|
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+/*
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+ * Verification code
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+ */
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+
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+static int yaffs_SkipVerification(yaffs_Device *dev)
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+{
|
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+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
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+}
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+
|
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+static int yaffs_SkipFullVerification(yaffs_Device *dev)
|
|
+{
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+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
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+}
|
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+
|
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+static int yaffs_SkipNANDVerification(yaffs_Device *dev)
|
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+{
|
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+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
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+}
|
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+
|
|
+static const char * blockStateName[] = {
|
|
+"Unknown",
|
|
+"Needs scanning",
|
|
+"Scanning",
|
|
+"Empty",
|
|
+"Allocating",
|
|
+"Full",
|
|
+"Dirty",
|
|
+"Checkpoint",
|
|
+"Collecting",
|
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+"Dead"
|
|
+};
|
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+
|
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+static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
|
|
+{
|
|
+ int actuallyUsed;
|
|
+ int inUse;
|
|
+
|
|
+ if(yaffs_SkipVerification(dev))
|
|
+ return;
|
|
+
|
|
+ /* Report illegal runtime states */
|
|
+ if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState));
|
|
+
|
|
+ switch(bi->blockState){
|
|
+ case YAFFS_BLOCK_STATE_UNKNOWN:
|
|
+ case YAFFS_BLOCK_STATE_SCANNING:
|
|
+ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR),
|
|
+ n,blockStateName[bi->blockState]));
|
|
+ }
|
|
+
|
|
+ /* Check pages in use and soft deletions are legal */
|
|
+
|
|
+ actuallyUsed = bi->pagesInUse - bi->softDeletions;
|
|
+
|
|
+ if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
|
|
+ bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
|
|
+ actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
|
|
+ n,bi->pagesInUse,bi->softDeletions));
|
|
+
|
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+
|
|
+ /* Check chunk bitmap legal */
|
|
+ inUse = yaffs_CountChunkBits(dev,n);
|
|
+ if(inUse != bi->pagesInUse)
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
|
|
+ n,bi->pagesInUse,inUse));
|
|
+
|
|
+ /* Check that the sequence number is valid.
|
|
+ * Ten million is legal, but is very unlikely
|
|
+ */
|
|
+ if(dev->isYaffs2 &&
|
|
+ (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
|
|
+ (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 ))
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR),
|
|
+ n,bi->sequenceNumber));
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
|
|
+{
|
|
+ yaffs_VerifyBlock(dev,bi,n);
|
|
+
|
|
+ /* After collection the block should be in the erased state */
|
|
+ /* TODO: This will need to change if we do partial gc */
|
|
+
|
|
+ if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){
|
|
+ T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
|
|
+ n,bi->blockState));
|
|
+ }
|
|
+}
|
|
+
|
|
+static void yaffs_VerifyBlocks(yaffs_Device *dev)
|
|
+{
|
|
+ int i;
|
|
+ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
|
|
+ int nIllegalBlockStates = 0;
|
|
+
|
|
+
|
|
+ if(yaffs_SkipVerification(dev))
|
|
+ return;
|
|
+
|
|
+ memset(nBlocksPerState,0,sizeof(nBlocksPerState));
|
|
+
|
|
+
|
|
+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
|
|
+ yaffs_VerifyBlock(dev,bi,i);
|
|
+
|
|
+ if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
|
|
+ nBlocksPerState[bi->blockState]++;
|
|
+ else
|
|
+ nIllegalBlockStates++;
|
|
+
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR)));
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR)));
|
|
+
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates));
|
|
+ if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR)));
|
|
+
|
|
+ for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("%s %d blocks"TENDSTR),
|
|
+ blockStateName[i],nBlocksPerState[i]));
|
|
+
|
|
+ if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
|
|
+ dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
|
|
+
|
|
+ if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
|
|
+ dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
|
|
+
|
|
+ if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
|
|
+ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
|
|
+
|
|
+ T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR)));
|
|
+
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
|
|
+ * case those tests will not be performed.
|
|
+ */
|
|
+static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
|
|
+{
|
|
+ if(yaffs_SkipVerification(obj->myDev))
|
|
+ return;
|
|
+
|
|
+ if(!(tags && obj && oh)){
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
|
|
+ (__u32)tags,(__u32)obj,(__u32)oh));
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
|
|
+ oh->type > YAFFS_OBJECT_TYPE_MAX)
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
|
|
+ tags->objectId, oh->type));
|
|
+
|
|
+ if(tags->objectId != obj->objectId)
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
|
|
+ tags->objectId, obj->objectId));
|
|
+
|
|
+
|
|
+ /*
|
|
+ * Check that the object's parent ids match if parentCheck requested.
|
|
+ *
|
|
+ * Tests do not apply to the root object.
|
|
+ */
|
|
+
|
|
+ if(parentCheck && tags->objectId > 1 && !obj->parent)
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
|
|
+ tags->objectId, oh->parentObjectId));
|
|
+
|
|
+
|
|
+ if(parentCheck && obj->parent &&
|
|
+ oh->parentObjectId != obj->parent->objectId &&
|
|
+ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
|
|
+ obj->parent->objectId != YAFFS_OBJECTID_DELETED))
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
|
|
+ tags->objectId, oh->parentObjectId, obj->parent->objectId));
|
|
+
|
|
+
|
|
+ if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d header name is NULL"TENDSTR),
|
|
+ obj->objectId));
|
|
+
|
|
+ if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d header name is 0xFF"TENDSTR),
|
|
+ obj->objectId));
|
|
+}
|
|
+
|
|
+
|
|
+
|
|
+static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn,
|
|
+ __u32 level, int chunkOffset)
|
|
+{
|
|
+ int i;
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+ int ok = 1;
|
|
+ int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
|
|
+
|
|
+ if (tn) {
|
|
+ if (level > 0) {
|
|
+
|
|
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
|
|
+ if (tn->internal[i]) {
|
|
+ ok = yaffs_VerifyTnodeWorker(obj,
|
|
+ tn->internal[i],
|
|
+ level - 1,
|
|
+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
|
|
+ }
|
|
+ }
|
|
+ } else if (level == 0) {
|
|
+ int i;
|
|
+ yaffs_ExtendedTags tags;
|
|
+ __u32 objectId = obj->objectId;
|
|
+
|
|
+ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
|
|
+
|
|
+ for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){
|
|
+ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
|
|
+
|
|
+ if(theChunk > 0){
|
|
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
|
|
+ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
|
|
+ if(tags.objectId != objectId || tags.chunkId != chunkOffset){
|
|
+ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
|
|
+ objectId, chunkOffset, theChunk,
|
|
+ tags.objectId, tags.chunkId));
|
|
+ }
|
|
+ }
|
|
+ chunkOffset++;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return ok;
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_VerifyFile(yaffs_Object *obj)
|
|
+{
|
|
+ int requiredTallness;
|
|
+ int actualTallness;
|
|
+ __u32 lastChunk;
|
|
+ __u32 x;
|
|
+ __u32 i;
|
|
+ int ok;
|
|
+ yaffs_Device *dev;
|
|
+ yaffs_ExtendedTags tags;
|
|
+ yaffs_Tnode *tn;
|
|
+ __u32 objectId;
|
|
+
|
|
+ if(obj && yaffs_SkipVerification(obj->myDev))
|
|
+ return;
|
|
+
|
|
+ dev = obj->myDev;
|
|
+ objectId = obj->objectId;
|
|
+
|
|
+ /* Check file size is consistent with tnode depth */
|
|
+ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
|
|
+ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
|
|
+ requiredTallness = 0;
|
|
+ while (x> 0) {
|
|
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
|
|
+ requiredTallness++;
|
|
+ }
|
|
+
|
|
+ actualTallness = obj->variant.fileVariant.topLevel;
|
|
+
|
|
+ if(requiredTallness > actualTallness )
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
|
|
+ obj->objectId,actualTallness, requiredTallness));
|
|
+
|
|
+
|
|
+ /* Check that the chunks in the tnode tree are all correct.
|
|
+ * We do this by scanning through the tnode tree and
|
|
+ * checking the tags for every chunk match.
|
|
+ */
|
|
+
|
|
+ if(yaffs_SkipNANDVerification(dev))
|
|
+ return;
|
|
+
|
|
+ for(i = 1; i <= lastChunk; i++){
|
|
+ tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i);
|
|
+
|
|
+ if (tn) {
|
|
+ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
|
|
+ if(theChunk > 0){
|
|
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
|
|
+ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
|
|
+ if(tags.objectId != objectId || tags.chunkId != i){
|
|
+ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
|
|
+ objectId, i, theChunk,
|
|
+ tags.objectId, tags.chunkId));
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_VerifyDirectory(yaffs_Object *obj)
|
|
+{
|
|
+ if(obj && yaffs_SkipVerification(obj->myDev))
|
|
+ return;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_VerifyHardLink(yaffs_Object *obj)
|
|
+{
|
|
+ if(obj && yaffs_SkipVerification(obj->myDev))
|
|
+ return;
|
|
+
|
|
+ /* Verify sane equivalent object */
|
|
+}
|
|
+
|
|
+static void yaffs_VerifySymlink(yaffs_Object *obj)
|
|
+{
|
|
+ if(obj && yaffs_SkipVerification(obj->myDev))
|
|
+ return;
|
|
+
|
|
+ /* Verify symlink string */
|
|
+}
|
|
+
|
|
+static void yaffs_VerifySpecial(yaffs_Object *obj)
|
|
+{
|
|
+ if(obj && yaffs_SkipVerification(obj->myDev))
|
|
+ return;
|
|
+}
|
|
+
|
|
+static void yaffs_VerifyObject(yaffs_Object *obj)
|
|
+{
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ __u32 chunkMin;
|
|
+ __u32 chunkMax;
|
|
+
|
|
+ __u32 chunkIdOk;
|
|
+ __u32 chunkIsLive;
|
|
+
|
|
+ if(!obj)
|
|
+ return;
|
|
+
|
|
+ dev = obj->myDev;
|
|
+
|
|
+ if(yaffs_SkipVerification(dev))
|
|
+ return;
|
|
+
|
|
+ /* Check sane object header chunk */
|
|
+
|
|
+ chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
|
|
+ chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
|
|
+
|
|
+ chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax);
|
|
+ chunkIsLive = chunkIdOk &&
|
|
+ yaffs_CheckChunkBit(dev,
|
|
+ obj->chunkId / dev->nChunksPerBlock,
|
|
+ obj->chunkId % dev->nChunksPerBlock);
|
|
+ if(!obj->fake &&
|
|
+ (!chunkIdOk || !chunkIsLive)) {
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
|
|
+ obj->objectId,obj->chunkId,
|
|
+ chunkIdOk ? "" : ",out of range",
|
|
+ chunkIsLive || !chunkIdOk ? "" : ",marked as deleted"));
|
|
+ }
|
|
+
|
|
+ if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) {
|
|
+ yaffs_ExtendedTags tags;
|
|
+ yaffs_ObjectHeader *oh;
|
|
+ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
|
|
+
|
|
+ oh = (yaffs_ObjectHeader *)buffer;
|
|
+
|
|
+ yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags);
|
|
+
|
|
+ yaffs_VerifyObjectHeader(obj,oh,&tags,1);
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
|
|
+ }
|
|
+
|
|
+ /* Verify it has a parent */
|
|
+ if(obj && !obj->fake &&
|
|
+ (!obj->parent || obj->parent->myDev != dev)){
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
|
|
+ obj->objectId,obj->parent));
|
|
+ }
|
|
+
|
|
+ /* Verify parent is a directory */
|
|
+ if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
|
|
+ obj->objectId,obj->parent->variantType));
|
|
+ }
|
|
+
|
|
+ switch(obj->variantType){
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ yaffs_VerifyFile(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ yaffs_VerifySymlink(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ yaffs_VerifyDirectory(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ yaffs_VerifyHardLink(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ yaffs_VerifySpecial(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ default:
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Obj %d has illegaltype %d"TENDSTR),
|
|
+ obj->objectId,obj->variantType));
|
|
+ break;
|
|
+ }
|
|
+
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_VerifyObjects(yaffs_Device *dev)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ int i;
|
|
+ struct list_head *lh;
|
|
+
|
|
+ if(yaffs_SkipVerification(dev))
|
|
+ return;
|
|
+
|
|
+ /* Iterate through the objects in each hash entry */
|
|
+
|
|
+ for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){
|
|
+ list_for_each(lh, &dev->objectBucket[i].list) {
|
|
+ if (lh) {
|
|
+ obj = list_entry(lh, yaffs_Object, hashLink);
|
|
+ yaffs_VerifyObject(obj);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+/*
|
|
+ * Simple hash function. Needs to have a reasonable spread
|
|
+ */
|
|
+
|
|
+static Y_INLINE int yaffs_HashFunction(int n)
|
|
+{
|
|
+ n = abs(n);
|
|
+ return (n % YAFFS_NOBJECT_BUCKETS);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Access functions to useful fake objects
|
|
+ */
|
|
+
|
|
+yaffs_Object *yaffs_Root(yaffs_Device * dev)
|
|
+{
|
|
+ return dev->rootDir;
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
|
|
+{
|
|
+ return dev->lostNFoundDir;
|
|
+}
|
|
+
|
|
+
|
|
+/*
|
|
+ * Erased NAND checking functions
|
|
+ */
|
|
+
|
|
+int yaffs_CheckFF(__u8 * buffer, int nBytes)
|
|
+{
|
|
+ /* Horrible, slow implementation */
|
|
+ while (nBytes--) {
|
|
+ if (*buffer != 0xFF)
|
|
+ return 0;
|
|
+ buffer++;
|
|
+ }
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
|
|
+ int chunkInNAND)
|
|
+{
|
|
+
|
|
+ int retval = YAFFS_OK;
|
|
+ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+ yaffs_ExtendedTags tags;
|
|
+ int result;
|
|
+
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
|
|
+
|
|
+ if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
|
|
+ retval = YAFFS_FAIL;
|
|
+
|
|
+
|
|
+ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
|
|
+ T(YAFFS_TRACE_NANDACCESS,
|
|
+ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
|
|
+ retval = YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
|
|
+
|
|
+ return retval;
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
|
|
+ const __u8 * data,
|
|
+ yaffs_ExtendedTags * tags,
|
|
+ int useReserve)
|
|
+{
|
|
+ int attempts = 0;
|
|
+ int writeOk = 0;
|
|
+ int chunk;
|
|
+
|
|
+ yaffs_InvalidateCheckpoint(dev);
|
|
+
|
|
+ do {
|
|
+ yaffs_BlockInfo *bi = 0;
|
|
+ int erasedOk = 0;
|
|
+
|
|
+ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
|
|
+ if (chunk < 0) {
|
|
+ /* no space */
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ /* First check this chunk is erased, if it needs
|
|
+ * checking. The checking policy (unless forced
|
|
+ * always on) is as follows:
|
|
+ *
|
|
+ * Check the first page we try to write in a block.
|
|
+ * If the check passes then we don't need to check any
|
|
+ * more. If the check fails, we check again...
|
|
+ * If the block has been erased, we don't need to check.
|
|
+ *
|
|
+ * However, if the block has been prioritised for gc,
|
|
+ * then we think there might be something odd about
|
|
+ * this block and stop using it.
|
|
+ *
|
|
+ * Rationale: We should only ever see chunks that have
|
|
+ * not been erased if there was a partially written
|
|
+ * chunk due to power loss. This checking policy should
|
|
+ * catch that case with very few checks and thus save a
|
|
+ * lot of checks that are most likely not needed.
|
|
+ */
|
|
+ if (bi->gcPrioritise) {
|
|
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
|
|
+ /* try another chunk */
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ /* let's give it a try */
|
|
+ attempts++;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
|
|
+ bi->skipErasedCheck = 0;
|
|
+#endif
|
|
+ if (!bi->skipErasedCheck) {
|
|
+ erasedOk = yaffs_CheckChunkErased(dev, chunk);
|
|
+ if (erasedOk != YAFFS_OK) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR ("**>> yaffs chunk %d was not erased"
|
|
+ TENDSTR), chunk));
|
|
+
|
|
+ /* try another chunk */
|
|
+ continue;
|
|
+ }
|
|
+ bi->skipErasedCheck = 1;
|
|
+ }
|
|
+
|
|
+ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
|
|
+ data, tags);
|
|
+ if (writeOk != YAFFS_OK) {
|
|
+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
|
|
+ /* try another chunk */
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ /* Copy the data into the robustification buffer */
|
|
+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
|
|
+
|
|
+ } while (writeOk != YAFFS_OK && attempts < yaffs_wr_attempts);
|
|
+
|
|
+ if (attempts > 1) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
|
|
+ attempts));
|
|
+
|
|
+ dev->nRetriedWrites += (attempts - 1);
|
|
+ }
|
|
+
|
|
+ return chunk;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Block retiring for handling a broken block.
|
|
+ */
|
|
+
|
|
+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
|
|
+{
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
|
|
+
|
|
+ yaffs_InvalidateCheckpoint(dev);
|
|
+
|
|
+ yaffs_MarkBlockBad(dev, blockInNAND);
|
|
+
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
|
|
+ bi->gcPrioritise = 0;
|
|
+ bi->needsRetiring = 0;
|
|
+
|
|
+ dev->nRetiredBlocks++;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Functions for robustisizing TODO
|
|
+ *
|
|
+ */
|
|
+
|
|
+static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_ExtendedTags * tags)
|
|
+{
|
|
+}
|
|
+
|
|
+static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
|
|
+ const yaffs_ExtendedTags * tags)
|
|
+{
|
|
+}
|
|
+
|
|
+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
|
|
+{
|
|
+ if(!bi->gcPrioritise){
|
|
+ bi->gcPrioritise = 1;
|
|
+ dev->hasPendingPrioritisedGCs = 1;
|
|
+ bi->chunkErrorStrikes ++;
|
|
+
|
|
+ if(bi->chunkErrorStrikes > 3){
|
|
+ bi->needsRetiring = 1; /* Too many stikes, so retire this */
|
|
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+}
|
|
+
|
|
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk)
|
|
+{
|
|
+
|
|
+ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
|
|
+
|
|
+ yaffs_HandleChunkError(dev,bi);
|
|
+
|
|
+
|
|
+ if(erasedOk ) {
|
|
+ /* Was an actual write failure, so mark the block for retirement */
|
|
+ bi->needsRetiring = 1;
|
|
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
|
|
+ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
|
|
+
|
|
+
|
|
+ }
|
|
+
|
|
+ /* Delete the chunk */
|
|
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
|
|
+}
|
|
+
|
|
+
|
|
+/*---------------- Name handling functions ------------*/
|
|
+
|
|
+static __u16 yaffs_CalcNameSum(const YCHAR * name)
|
|
+{
|
|
+ __u16 sum = 0;
|
|
+ __u16 i = 1;
|
|
+
|
|
+ YUCHAR *bname = (YUCHAR *) name;
|
|
+ if (bname) {
|
|
+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
|
|
+
|
|
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
|
|
+ sum += yaffs_toupper(*bname) * i;
|
|
+#else
|
|
+ sum += (*bname) * i;
|
|
+#endif
|
|
+ i++;
|
|
+ bname++;
|
|
+ }
|
|
+ }
|
|
+ return sum;
|
|
+}
|
|
+
|
|
+static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name)
|
|
+{
|
|
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
|
+ if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) {
|
|
+ yaffs_strcpy(obj->shortName, name);
|
|
+ } else {
|
|
+ obj->shortName[0] = _Y('\0');
|
|
+ }
|
|
+#endif
|
|
+ obj->sum = yaffs_CalcNameSum(name);
|
|
+}
|
|
+
|
|
+/*-------------------- TNODES -------------------
|
|
+
|
|
+ * List of spare tnodes
|
|
+ * The list is hooked together using the first pointer
|
|
+ * in the tnode.
|
|
+ */
|
|
+
|
|
+/* yaffs_CreateTnodes creates a bunch more tnodes and
|
|
+ * adds them to the tnode free list.
|
|
+ * Don't use this function directly
|
|
+ */
|
|
+
|
|
+static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
|
|
+{
|
|
+ int i;
|
|
+ int tnodeSize;
|
|
+ yaffs_Tnode *newTnodes;
|
|
+ __u8 *mem;
|
|
+ yaffs_Tnode *curr;
|
|
+ yaffs_Tnode *next;
|
|
+ yaffs_TnodeList *tnl;
|
|
+
|
|
+ if (nTnodes < 1)
|
|
+ return YAFFS_OK;
|
|
+
|
|
+ /* Calculate the tnode size in bytes for variable width tnode support.
|
|
+ * Must be a multiple of 32-bits */
|
|
+ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
|
|
+
|
|
+ /* make these things */
|
|
+
|
|
+ newTnodes = YMALLOC(nTnodes * tnodeSize);
|
|
+ mem = (__u8 *)newTnodes;
|
|
+
|
|
+ if (!newTnodes) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Hook them into the free list */
|
|
+#if 0
|
|
+ for (i = 0; i < nTnodes - 1; i++) {
|
|
+ newTnodes[i].internal[0] = &newTnodes[i + 1];
|
|
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
|
+ newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
|
|
+#endif
|
|
+ }
|
|
+
|
|
+ newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
|
|
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
|
+ newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
|
|
+#endif
|
|
+ dev->freeTnodes = newTnodes;
|
|
+#else
|
|
+ /* New hookup for wide tnodes */
|
|
+ for(i = 0; i < nTnodes -1; i++) {
|
|
+ curr = (yaffs_Tnode *) &mem[i * tnodeSize];
|
|
+ next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
|
|
+ curr->internal[0] = next;
|
|
+ }
|
|
+
|
|
+ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
|
|
+ curr->internal[0] = dev->freeTnodes;
|
|
+ dev->freeTnodes = (yaffs_Tnode *)mem;
|
|
+
|
|
+#endif
|
|
+
|
|
+
|
|
+ dev->nFreeTnodes += nTnodes;
|
|
+ dev->nTnodesCreated += nTnodes;
|
|
+
|
|
+ /* Now add this bunch of tnodes to a list for freeing up.
|
|
+ * NB If we can't add this to the management list it isn't fatal
|
|
+ * but it just means we can't free this bunch of tnodes later.
|
|
+ */
|
|
+
|
|
+ tnl = YMALLOC(sizeof(yaffs_TnodeList));
|
|
+ if (!tnl) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("yaffs: Could not add tnodes to management list" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+ } else {
|
|
+ tnl->tnodes = newTnodes;
|
|
+ tnl->next = dev->allocatedTnodeList;
|
|
+ dev->allocatedTnodeList = tnl;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
|
|
+
|
|
+static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev)
|
|
+{
|
|
+ yaffs_Tnode *tn = NULL;
|
|
+
|
|
+ /* If there are none left make more */
|
|
+ if (!dev->freeTnodes) {
|
|
+ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
|
|
+ }
|
|
+
|
|
+ if (dev->freeTnodes) {
|
|
+ tn = dev->freeTnodes;
|
|
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
|
+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
|
|
+ /* Hoosterman, this thing looks like it isn't in the list */
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
|
|
+ }
|
|
+#endif
|
|
+ dev->freeTnodes = dev->freeTnodes->internal[0];
|
|
+ dev->nFreeTnodes--;
|
|
+ }
|
|
+
|
|
+ return tn;
|
|
+}
|
|
+
|
|
+static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
|
|
+{
|
|
+ yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
|
|
+
|
|
+ if(tn)
|
|
+ memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
|
|
+
|
|
+ return tn;
|
|
+}
|
|
+
|
|
+/* FreeTnode frees up a tnode and puts it back on the free list */
|
|
+static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn)
|
|
+{
|
|
+ if (tn) {
|
|
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
|
+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
|
|
+ /* Hoosterman, this thing looks like it is already in the list */
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
|
|
+ }
|
|
+ tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
|
|
+#endif
|
|
+ tn->internal[0] = dev->freeTnodes;
|
|
+ dev->freeTnodes = tn;
|
|
+ dev->nFreeTnodes++;
|
|
+ }
|
|
+}
|
|
+
|
|
+static void yaffs_DeinitialiseTnodes(yaffs_Device * dev)
|
|
+{
|
|
+ /* Free the list of allocated tnodes */
|
|
+ yaffs_TnodeList *tmp;
|
|
+
|
|
+ while (dev->allocatedTnodeList) {
|
|
+ tmp = dev->allocatedTnodeList->next;
|
|
+
|
|
+ YFREE(dev->allocatedTnodeList->tnodes);
|
|
+ YFREE(dev->allocatedTnodeList);
|
|
+ dev->allocatedTnodeList = tmp;
|
|
+
|
|
+ }
|
|
+
|
|
+ dev->freeTnodes = NULL;
|
|
+ dev->nFreeTnodes = 0;
|
|
+}
|
|
+
|
|
+static void yaffs_InitialiseTnodes(yaffs_Device * dev)
|
|
+{
|
|
+ dev->allocatedTnodeList = NULL;
|
|
+ dev->freeTnodes = NULL;
|
|
+ dev->nFreeTnodes = 0;
|
|
+ dev->nTnodesCreated = 0;
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val)
|
|
+{
|
|
+ __u32 *map = (__u32 *)tn;
|
|
+ __u32 bitInMap;
|
|
+ __u32 bitInWord;
|
|
+ __u32 wordInMap;
|
|
+ __u32 mask;
|
|
+
|
|
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
|
|
+ val >>= dev->chunkGroupBits;
|
|
+
|
|
+ bitInMap = pos * dev->tnodeWidth;
|
|
+ wordInMap = bitInMap /32;
|
|
+ bitInWord = bitInMap & (32 -1);
|
|
+
|
|
+ mask = dev->tnodeMask << bitInWord;
|
|
+
|
|
+ map[wordInMap] &= ~mask;
|
|
+ map[wordInMap] |= (mask & (val << bitInWord));
|
|
+
|
|
+ if(dev->tnodeWidth > (32-bitInWord)) {
|
|
+ bitInWord = (32 - bitInWord);
|
|
+ wordInMap++;;
|
|
+ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
|
|
+ map[wordInMap] &= ~mask;
|
|
+ map[wordInMap] |= (mask & (val >> bitInWord));
|
|
+ }
|
|
+}
|
|
+
|
|
+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos)
|
|
+{
|
|
+ __u32 *map = (__u32 *)tn;
|
|
+ __u32 bitInMap;
|
|
+ __u32 bitInWord;
|
|
+ __u32 wordInMap;
|
|
+ __u32 val;
|
|
+
|
|
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
|
|
+
|
|
+ bitInMap = pos * dev->tnodeWidth;
|
|
+ wordInMap = bitInMap /32;
|
|
+ bitInWord = bitInMap & (32 -1);
|
|
+
|
|
+ val = map[wordInMap] >> bitInWord;
|
|
+
|
|
+ if(dev->tnodeWidth > (32-bitInWord)) {
|
|
+ bitInWord = (32 - bitInWord);
|
|
+ wordInMap++;;
|
|
+ val |= (map[wordInMap] << bitInWord);
|
|
+ }
|
|
+
|
|
+ val &= dev->tnodeMask;
|
|
+ val <<= dev->chunkGroupBits;
|
|
+
|
|
+ return val;
|
|
+}
|
|
+
|
|
+/* ------------------- End of individual tnode manipulation -----------------*/
|
|
+
|
|
+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
|
|
+ * The look up tree is represented by the top tnode and the number of topLevel
|
|
+ * in the tree. 0 means only the level 0 tnode is in the tree.
|
|
+ */
|
|
+
|
|
+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
|
|
+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
|
|
+ yaffs_FileStructure * fStruct,
|
|
+ __u32 chunkId)
|
|
+{
|
|
+
|
|
+ yaffs_Tnode *tn = fStruct->top;
|
|
+ __u32 i;
|
|
+ int requiredTallness;
|
|
+ int level = fStruct->topLevel;
|
|
+
|
|
+ /* Check sane level and chunk Id */
|
|
+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ if (chunkId > YAFFS_MAX_CHUNK_ID) {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ /* First check we're tall enough (ie enough topLevel) */
|
|
+
|
|
+ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
|
|
+ requiredTallness = 0;
|
|
+ while (i) {
|
|
+ i >>= YAFFS_TNODES_INTERNAL_BITS;
|
|
+ requiredTallness++;
|
|
+ }
|
|
+
|
|
+ if (requiredTallness > fStruct->topLevel) {
|
|
+ /* Not tall enough, so we can't find it, return NULL. */
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ /* Traverse down to level 0 */
|
|
+ while (level > 0 && tn) {
|
|
+ tn = tn->
|
|
+ internal[(chunkId >>
|
|
+ ( YAFFS_TNODES_LEVEL0_BITS +
|
|
+ (level - 1) *
|
|
+ YAFFS_TNODES_INTERNAL_BITS)
|
|
+ ) &
|
|
+ YAFFS_TNODES_INTERNAL_MASK];
|
|
+ level--;
|
|
+
|
|
+ }
|
|
+
|
|
+ return tn;
|
|
+}
|
|
+
|
|
+/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
|
|
+ * This happens in two steps:
|
|
+ * 1. If the tree isn't tall enough, then make it taller.
|
|
+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
|
|
+ *
|
|
+ * Used when modifying the tree.
|
|
+ *
|
|
+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
|
|
+ * be plugged into the ttree.
|
|
+ */
|
|
+
|
|
+static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
|
|
+ yaffs_FileStructure * fStruct,
|
|
+ __u32 chunkId,
|
|
+ yaffs_Tnode *passedTn)
|
|
+{
|
|
+
|
|
+ int requiredTallness;
|
|
+ int i;
|
|
+ int l;
|
|
+ yaffs_Tnode *tn;
|
|
+
|
|
+ __u32 x;
|
|
+
|
|
+
|
|
+ /* Check sane level and page Id */
|
|
+ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ if (chunkId > YAFFS_MAX_CHUNK_ID) {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ /* First check we're tall enough (ie enough topLevel) */
|
|
+
|
|
+ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
|
|
+ requiredTallness = 0;
|
|
+ while (x) {
|
|
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
|
|
+ requiredTallness++;
|
|
+ }
|
|
+
|
|
+
|
|
+ if (requiredTallness > fStruct->topLevel) {
|
|
+ /* Not tall enough,gotta make the tree taller */
|
|
+ for (i = fStruct->topLevel; i < requiredTallness; i++) {
|
|
+
|
|
+ tn = yaffs_GetTnode(dev);
|
|
+
|
|
+ if (tn) {
|
|
+ tn->internal[0] = fStruct->top;
|
|
+ fStruct->top = tn;
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("yaffs: no more tnodes" TENDSTR)));
|
|
+ }
|
|
+ }
|
|
+
|
|
+ fStruct->topLevel = requiredTallness;
|
|
+ }
|
|
+
|
|
+ /* Traverse down to level 0, adding anything we need */
|
|
+
|
|
+ l = fStruct->topLevel;
|
|
+ tn = fStruct->top;
|
|
+
|
|
+ if(l > 0) {
|
|
+ while (l > 0 && tn) {
|
|
+ x = (chunkId >>
|
|
+ ( YAFFS_TNODES_LEVEL0_BITS +
|
|
+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
|
|
+ YAFFS_TNODES_INTERNAL_MASK;
|
|
+
|
|
+
|
|
+ if((l>1) && !tn->internal[x]){
|
|
+ /* Add missing non-level-zero tnode */
|
|
+ tn->internal[x] = yaffs_GetTnode(dev);
|
|
+
|
|
+ } else if(l == 1) {
|
|
+ /* Looking from level 1 at level 0 */
|
|
+ if (passedTn) {
|
|
+ /* If we already have one, then release it.*/
|
|
+ if(tn->internal[x])
|
|
+ yaffs_FreeTnode(dev,tn->internal[x]);
|
|
+ tn->internal[x] = passedTn;
|
|
+
|
|
+ } else if(!tn->internal[x]) {
|
|
+ /* Don't have one, none passed in */
|
|
+ tn->internal[x] = yaffs_GetTnode(dev);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ tn = tn->internal[x];
|
|
+ l--;
|
|
+ }
|
|
+ } else {
|
|
+ /* top is level 0 */
|
|
+ if(passedTn) {
|
|
+ memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
|
|
+ yaffs_FreeTnode(dev,passedTn);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return tn;
|
|
+}
|
|
+
|
|
+static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk,
|
|
+ yaffs_ExtendedTags * tags, int objectId,
|
|
+ int chunkInInode)
|
|
+{
|
|
+ int j;
|
|
+
|
|
+ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
|
|
+ if (yaffs_CheckChunkBit
|
|
+ (dev, theChunk / dev->nChunksPerBlock,
|
|
+ theChunk % dev->nChunksPerBlock)) {
|
|
+ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
|
|
+ tags);
|
|
+ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
|
|
+ /* found it; */
|
|
+ return theChunk;
|
|
+
|
|
+ }
|
|
+ }
|
|
+ theChunk++;
|
|
+ }
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+
|
|
+/* DeleteWorker scans backwards through the tnode tree and deletes all the
|
|
+ * chunks and tnodes in the file
|
|
+ * Returns 1 if the tree was deleted.
|
|
+ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
|
|
+ */
|
|
+
|
|
+static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
|
|
+ int chunkOffset, int *limit)
|
|
+{
|
|
+ int i;
|
|
+ int chunkInInode;
|
|
+ int theChunk;
|
|
+ yaffs_ExtendedTags tags;
|
|
+ int foundChunk;
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ int allDone = 1;
|
|
+
|
|
+ if (tn) {
|
|
+ if (level > 0) {
|
|
+
|
|
+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
|
|
+ i--) {
|
|
+ if (tn->internal[i]) {
|
|
+ if (limit && (*limit) < 0) {
|
|
+ allDone = 0;
|
|
+ } else {
|
|
+ allDone =
|
|
+ yaffs_DeleteWorker(in,
|
|
+ tn->
|
|
+ internal
|
|
+ [i],
|
|
+ level -
|
|
+ 1,
|
|
+ (chunkOffset
|
|
+ <<
|
|
+ YAFFS_TNODES_INTERNAL_BITS)
|
|
+ + i,
|
|
+ limit);
|
|
+ }
|
|
+ if (allDone) {
|
|
+ yaffs_FreeTnode(dev,
|
|
+ tn->
|
|
+ internal[i]);
|
|
+ tn->internal[i] = NULL;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ }
|
|
+ return (allDone) ? 1 : 0;
|
|
+ } else if (level == 0) {
|
|
+ int hitLimit = 0;
|
|
+
|
|
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
|
|
+ i--) {
|
|
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
|
|
+ if (theChunk) {
|
|
+
|
|
+ chunkInInode =
|
|
+ (chunkOffset <<
|
|
+ YAFFS_TNODES_LEVEL0_BITS) + i;
|
|
+
|
|
+ foundChunk =
|
|
+ yaffs_FindChunkInGroup(dev,
|
|
+ theChunk,
|
|
+ &tags,
|
|
+ in->objectId,
|
|
+ chunkInInode);
|
|
+
|
|
+ if (foundChunk > 0) {
|
|
+ yaffs_DeleteChunk(dev,
|
|
+ foundChunk, 1,
|
|
+ __LINE__);
|
|
+ in->nDataChunks--;
|
|
+ if (limit) {
|
|
+ *limit = *limit - 1;
|
|
+ if (*limit <= 0) {
|
|
+ hitLimit = 1;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ yaffs_PutLevel0Tnode(dev,tn,i,0);
|
|
+ }
|
|
+
|
|
+ }
|
|
+ return (i < 0) ? 1 : 0;
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk)
|
|
+{
|
|
+
|
|
+ yaffs_BlockInfo *theBlock;
|
|
+
|
|
+ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
|
|
+
|
|
+ theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
|
|
+ if (theBlock) {
|
|
+ theBlock->softDeletions++;
|
|
+ dev->nFreeChunks++;
|
|
+ }
|
|
+}
|
|
+
|
|
+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
|
|
+ * All soft deleting does is increment the block's softdelete count and pulls the chunk out
|
|
+ * of the tnode.
|
|
+ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
|
|
+ */
|
|
+
|
|
+static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn,
|
|
+ __u32 level, int chunkOffset)
|
|
+{
|
|
+ int i;
|
|
+ int theChunk;
|
|
+ int allDone = 1;
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ if (tn) {
|
|
+ if (level > 0) {
|
|
+
|
|
+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
|
|
+ i--) {
|
|
+ if (tn->internal[i]) {
|
|
+ allDone =
|
|
+ yaffs_SoftDeleteWorker(in,
|
|
+ tn->
|
|
+ internal[i],
|
|
+ level - 1,
|
|
+ (chunkOffset
|
|
+ <<
|
|
+ YAFFS_TNODES_INTERNAL_BITS)
|
|
+ + i);
|
|
+ if (allDone) {
|
|
+ yaffs_FreeTnode(dev,
|
|
+ tn->
|
|
+ internal[i]);
|
|
+ tn->internal[i] = NULL;
|
|
+ } else {
|
|
+ /* Hoosterman... how could this happen? */
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ return (allDone) ? 1 : 0;
|
|
+ } else if (level == 0) {
|
|
+
|
|
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
|
|
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
|
|
+ if (theChunk) {
|
|
+ /* Note this does not find the real chunk, only the chunk group.
|
|
+ * We make an assumption that a chunk group is not larger than
|
|
+ * a block.
|
|
+ */
|
|
+ yaffs_SoftDeleteChunk(dev, theChunk);
|
|
+ yaffs_PutLevel0Tnode(dev,tn,i,0);
|
|
+ }
|
|
+
|
|
+ }
|
|
+ return 1;
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_SoftDeleteFile(yaffs_Object * obj)
|
|
+{
|
|
+ if (obj->deleted &&
|
|
+ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
|
|
+ if (obj->nDataChunks <= 0) {
|
|
+ /* Empty file with no duplicate object headers, just delete it immediately */
|
|
+ yaffs_FreeTnode(obj->myDev,
|
|
+ obj->variant.fileVariant.top);
|
|
+ obj->variant.fileVariant.top = NULL;
|
|
+ T(YAFFS_TRACE_TRACING,
|
|
+ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
|
|
+ obj->objectId));
|
|
+ yaffs_DoGenericObjectDeletion(obj);
|
|
+ } else {
|
|
+ yaffs_SoftDeleteWorker(obj,
|
|
+ obj->variant.fileVariant.top,
|
|
+ obj->variant.fileVariant.
|
|
+ topLevel, 0);
|
|
+ obj->softDeleted = 1;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+/* Pruning removes any part of the file structure tree that is beyond the
|
|
+ * bounds of the file (ie that does not point to chunks).
|
|
+ *
|
|
+ * A file should only get pruned when its size is reduced.
|
|
+ *
|
|
+ * Before pruning, the chunks must be pulled from the tree and the
|
|
+ * level 0 tnode entries must be zeroed out.
|
|
+ * Could also use this for file deletion, but that's probably better handled
|
|
+ * by a special case.
|
|
+ */
|
|
+
|
|
+static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn,
|
|
+ __u32 level, int del0)
|
|
+{
|
|
+ int i;
|
|
+ int hasData;
|
|
+
|
|
+ if (tn) {
|
|
+ hasData = 0;
|
|
+
|
|
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
|
|
+ if (tn->internal[i] && level > 0) {
|
|
+ tn->internal[i] =
|
|
+ yaffs_PruneWorker(dev, tn->internal[i],
|
|
+ level - 1,
|
|
+ (i == 0) ? del0 : 1);
|
|
+ }
|
|
+
|
|
+ if (tn->internal[i]) {
|
|
+ hasData++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (hasData == 0 && del0) {
|
|
+ /* Free and return NULL */
|
|
+
|
|
+ yaffs_FreeTnode(dev, tn);
|
|
+ tn = NULL;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return tn;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_PruneFileStructure(yaffs_Device * dev,
|
|
+ yaffs_FileStructure * fStruct)
|
|
+{
|
|
+ int i;
|
|
+ int hasData;
|
|
+ int done = 0;
|
|
+ yaffs_Tnode *tn;
|
|
+
|
|
+ if (fStruct->topLevel > 0) {
|
|
+ fStruct->top =
|
|
+ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
|
|
+
|
|
+ /* Now we have a tree with all the non-zero branches NULL but the height
|
|
+ * is the same as it was.
|
|
+ * Let's see if we can trim internal tnodes to shorten the tree.
|
|
+ * We can do this if only the 0th element in the tnode is in use
|
|
+ * (ie all the non-zero are NULL)
|
|
+ */
|
|
+
|
|
+ while (fStruct->topLevel && !done) {
|
|
+ tn = fStruct->top;
|
|
+
|
|
+ hasData = 0;
|
|
+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
|
|
+ if (tn->internal[i]) {
|
|
+ hasData++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (!hasData) {
|
|
+ fStruct->top = tn->internal[0];
|
|
+ fStruct->topLevel--;
|
|
+ yaffs_FreeTnode(dev, tn);
|
|
+ } else {
|
|
+ done = 1;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/*-------------------- End of File Structure functions.-------------------*/
|
|
+
|
|
+/* yaffs_CreateFreeObjects creates a bunch more objects and
|
|
+ * adds them to the object free list.
|
|
+ */
|
|
+static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects)
|
|
+{
|
|
+ int i;
|
|
+ yaffs_Object *newObjects;
|
|
+ yaffs_ObjectList *list;
|
|
+
|
|
+ if (nObjects < 1)
|
|
+ return YAFFS_OK;
|
|
+
|
|
+ /* make these things */
|
|
+ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
|
|
+ list = YMALLOC(sizeof(yaffs_ObjectList));
|
|
+
|
|
+ if (!newObjects || !list) {
|
|
+ if(newObjects)
|
|
+ YFREE(newObjects);
|
|
+ if(list)
|
|
+ YFREE(list);
|
|
+ T(YAFFS_TRACE_ALLOCATE,
|
|
+ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Hook them into the free list */
|
|
+ for (i = 0; i < nObjects - 1; i++) {
|
|
+ newObjects[i].siblings.next =
|
|
+ (struct list_head *)(&newObjects[i + 1]);
|
|
+ }
|
|
+
|
|
+ newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
|
|
+ dev->freeObjects = newObjects;
|
|
+ dev->nFreeObjects += nObjects;
|
|
+ dev->nObjectsCreated += nObjects;
|
|
+
|
|
+ /* Now add this bunch of Objects to a list for freeing up. */
|
|
+
|
|
+ list->objects = newObjects;
|
|
+ list->next = dev->allocatedObjectList;
|
|
+ dev->allocatedObjectList = list;
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+
|
|
+/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
|
|
+static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev)
|
|
+{
|
|
+ yaffs_Object *tn = NULL;
|
|
+
|
|
+ /* If there are none left make more */
|
|
+ if (!dev->freeObjects) {
|
|
+ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
|
|
+ }
|
|
+
|
|
+ if (dev->freeObjects) {
|
|
+ tn = dev->freeObjects;
|
|
+ dev->freeObjects =
|
|
+ (yaffs_Object *) (dev->freeObjects->siblings.next);
|
|
+ dev->nFreeObjects--;
|
|
+
|
|
+ /* Now sweeten it up... */
|
|
+
|
|
+ memset(tn, 0, sizeof(yaffs_Object));
|
|
+ tn->myDev = dev;
|
|
+ tn->chunkId = -1;
|
|
+ tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
|
|
+ INIT_LIST_HEAD(&(tn->hardLinks));
|
|
+ INIT_LIST_HEAD(&(tn->hashLink));
|
|
+ INIT_LIST_HEAD(&tn->siblings);
|
|
+
|
|
+ /* Add it to the lost and found directory.
|
|
+ * NB Can't put root or lostNFound in lostNFound so
|
|
+ * check if lostNFound exists first
|
|
+ */
|
|
+ if (dev->lostNFoundDir) {
|
|
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return tn;
|
|
+}
|
|
+
|
|
+static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number,
|
|
+ __u32 mode)
|
|
+{
|
|
+
|
|
+ yaffs_Object *obj =
|
|
+ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
+ if (obj) {
|
|
+ obj->fake = 1; /* it is fake so it has no NAND presence... */
|
|
+ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
|
|
+ obj->unlinkAllowed = 0; /* ... or unlink it */
|
|
+ obj->deleted = 0;
|
|
+ obj->unlinked = 0;
|
|
+ obj->yst_mode = mode;
|
|
+ obj->myDev = dev;
|
|
+ obj->chunkId = 0; /* Not a valid chunk. */
|
|
+ }
|
|
+
|
|
+ return obj;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_UnhashObject(yaffs_Object * tn)
|
|
+{
|
|
+ int bucket;
|
|
+ yaffs_Device *dev = tn->myDev;
|
|
+
|
|
+ /* If it is still linked into the bucket list, free from the list */
|
|
+ if (!list_empty(&tn->hashLink)) {
|
|
+ list_del_init(&tn->hashLink);
|
|
+ bucket = yaffs_HashFunction(tn->objectId);
|
|
+ dev->objectBucket[bucket].count--;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+/* FreeObject frees up a Object and puts it back on the free list */
|
|
+static void yaffs_FreeObject(yaffs_Object * tn)
|
|
+{
|
|
+
|
|
+ yaffs_Device *dev = tn->myDev;
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+ if (tn->myInode) {
|
|
+ /* We're still hooked up to a cached inode.
|
|
+ * Don't delete now, but mark for later deletion
|
|
+ */
|
|
+ tn->deferedFree = 1;
|
|
+ return;
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ yaffs_UnhashObject(tn);
|
|
+
|
|
+ /* Link into the free list. */
|
|
+ tn->siblings.next = (struct list_head *)(dev->freeObjects);
|
|
+ dev->freeObjects = tn;
|
|
+ dev->nFreeObjects++;
|
|
+}
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+
|
|
+void yaffs_HandleDeferedFree(yaffs_Object * obj)
|
|
+{
|
|
+ if (obj->deferedFree) {
|
|
+ yaffs_FreeObject(obj);
|
|
+ }
|
|
+}
|
|
+
|
|
+#endif
|
|
+
|
|
+static void yaffs_DeinitialiseObjects(yaffs_Device * dev)
|
|
+{
|
|
+ /* Free the list of allocated Objects */
|
|
+
|
|
+ yaffs_ObjectList *tmp;
|
|
+
|
|
+ while (dev->allocatedObjectList) {
|
|
+ tmp = dev->allocatedObjectList->next;
|
|
+ YFREE(dev->allocatedObjectList->objects);
|
|
+ YFREE(dev->allocatedObjectList);
|
|
+
|
|
+ dev->allocatedObjectList = tmp;
|
|
+ }
|
|
+
|
|
+ dev->freeObjects = NULL;
|
|
+ dev->nFreeObjects = 0;
|
|
+}
|
|
+
|
|
+static void yaffs_InitialiseObjects(yaffs_Device * dev)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ dev->allocatedObjectList = NULL;
|
|
+ dev->freeObjects = NULL;
|
|
+ dev->nFreeObjects = 0;
|
|
+
|
|
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
|
|
+ INIT_LIST_HEAD(&dev->objectBucket[i].list);
|
|
+ dev->objectBucket[i].count = 0;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_FindNiceObjectBucket(yaffs_Device * dev)
|
|
+{
|
|
+ static int x = 0;
|
|
+ int i;
|
|
+ int l = 999;
|
|
+ int lowest = 999999;
|
|
+
|
|
+ /* First let's see if we can find one that's empty. */
|
|
+
|
|
+ for (i = 0; i < 10 && lowest > 0; i++) {
|
|
+ x++;
|
|
+ x %= YAFFS_NOBJECT_BUCKETS;
|
|
+ if (dev->objectBucket[x].count < lowest) {
|
|
+ lowest = dev->objectBucket[x].count;
|
|
+ l = x;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ /* If we didn't find an empty list, then try
|
|
+ * looking a bit further for a short one
|
|
+ */
|
|
+
|
|
+ for (i = 0; i < 10 && lowest > 3; i++) {
|
|
+ x++;
|
|
+ x %= YAFFS_NOBJECT_BUCKETS;
|
|
+ if (dev->objectBucket[x].count < lowest) {
|
|
+ lowest = dev->objectBucket[x].count;
|
|
+ l = x;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return l;
|
|
+}
|
|
+
|
|
+static int yaffs_CreateNewObjectNumber(yaffs_Device * dev)
|
|
+{
|
|
+ int bucket = yaffs_FindNiceObjectBucket(dev);
|
|
+
|
|
+ /* Now find an object value that has not already been taken
|
|
+ * by scanning the list.
|
|
+ */
|
|
+
|
|
+ int found = 0;
|
|
+ struct list_head *i;
|
|
+
|
|
+ __u32 n = (__u32) bucket;
|
|
+
|
|
+ /* yaffs_CheckObjectHashSanity(); */
|
|
+
|
|
+ while (!found) {
|
|
+ found = 1;
|
|
+ n += YAFFS_NOBJECT_BUCKETS;
|
|
+ if (1 || dev->objectBucket[bucket].count > 0) {
|
|
+ list_for_each(i, &dev->objectBucket[bucket].list) {
|
|
+ /* If there is already one in the list */
|
|
+ if (i
|
|
+ && list_entry(i, yaffs_Object,
|
|
+ hashLink)->objectId == n) {
|
|
+ found = 0;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+
|
|
+ return n;
|
|
+}
|
|
+
|
|
+static void yaffs_HashObject(yaffs_Object * in)
|
|
+{
|
|
+ int bucket = yaffs_HashFunction(in->objectId);
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ list_add(&in->hashLink, &dev->objectBucket[bucket].list);
|
|
+ dev->objectBucket[bucket].count++;
|
|
+
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number)
|
|
+{
|
|
+ int bucket = yaffs_HashFunction(number);
|
|
+ struct list_head *i;
|
|
+ yaffs_Object *in;
|
|
+
|
|
+ list_for_each(i, &dev->objectBucket[bucket].list) {
|
|
+ /* Look if it is in the list */
|
|
+ if (i) {
|
|
+ in = list_entry(i, yaffs_Object, hashLink);
|
|
+ if (in->objectId == number) {
|
|
+#ifdef __KERNEL__
|
|
+ /* Don't tell the VFS about this one if it is defered free */
|
|
+ if (in->deferedFree)
|
|
+ return NULL;
|
|
+#endif
|
|
+
|
|
+ return in;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
|
|
+ yaffs_ObjectType type)
|
|
+{
|
|
+
|
|
+ yaffs_Object *theObject;
|
|
+ yaffs_Tnode *tn;
|
|
+
|
|
+ if (number < 0) {
|
|
+ number = yaffs_CreateNewObjectNumber(dev);
|
|
+ }
|
|
+
|
|
+ theObject = yaffs_AllocateEmptyObject(dev);
|
|
+ if(!theObject)
|
|
+ return NULL;
|
|
+
|
|
+ if(type == YAFFS_OBJECT_TYPE_FILE){
|
|
+ tn = yaffs_GetTnode(dev);
|
|
+ if(!tn){
|
|
+ yaffs_FreeObject(theObject);
|
|
+ return NULL;
|
|
+ }
|
|
+ }
|
|
+
|
|
+
|
|
+
|
|
+ if (theObject) {
|
|
+ theObject->fake = 0;
|
|
+ theObject->renameAllowed = 1;
|
|
+ theObject->unlinkAllowed = 1;
|
|
+ theObject->objectId = number;
|
|
+ yaffs_HashObject(theObject);
|
|
+ theObject->variantType = type;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_WinFileTimeNow(theObject->win_atime);
|
|
+ theObject->win_ctime[0] = theObject->win_mtime[0] =
|
|
+ theObject->win_atime[0];
|
|
+ theObject->win_ctime[1] = theObject->win_mtime[1] =
|
|
+ theObject->win_atime[1];
|
|
+
|
|
+#else
|
|
+
|
|
+ theObject->yst_atime = theObject->yst_mtime =
|
|
+ theObject->yst_ctime = Y_CURRENT_TIME;
|
|
+#endif
|
|
+ switch (type) {
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ theObject->variant.fileVariant.fileSize = 0;
|
|
+ theObject->variant.fileVariant.scannedFileSize = 0;
|
|
+ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
|
|
+ theObject->variant.fileVariant.topLevel = 0;
|
|
+ theObject->variant.fileVariant.top = tn;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ INIT_LIST_HEAD(&theObject->variant.directoryVariant.
|
|
+ children);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ /* No action required */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ /* todo this should not happen */
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return theObject;
|
|
+}
|
|
+
|
|
+static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev,
|
|
+ int number,
|
|
+ yaffs_ObjectType type)
|
|
+{
|
|
+ yaffs_Object *theObject = NULL;
|
|
+
|
|
+ if (number > 0) {
|
|
+ theObject = yaffs_FindObjectByNumber(dev, number);
|
|
+ }
|
|
+
|
|
+ if (!theObject) {
|
|
+ theObject = yaffs_CreateNewObject(dev, number, type);
|
|
+ }
|
|
+
|
|
+ return theObject;
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+static YCHAR *yaffs_CloneString(const YCHAR * str)
|
|
+{
|
|
+ YCHAR *newStr = NULL;
|
|
+
|
|
+ if (str && *str) {
|
|
+ newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
|
|
+ if(newStr)
|
|
+ yaffs_strcpy(newStr, str);
|
|
+ }
|
|
+
|
|
+ return newStr;
|
|
+
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Mknod (create) a new object.
|
|
+ * equivalentObject only has meaning for a hard link;
|
|
+ * aliasString only has meaning for a sumlink.
|
|
+ * rdev only has meaning for devices (a subset of special objects)
|
|
+ */
|
|
+
|
|
+static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
|
|
+ yaffs_Object * parent,
|
|
+ const YCHAR * name,
|
|
+ __u32 mode,
|
|
+ __u32 uid,
|
|
+ __u32 gid,
|
|
+ yaffs_Object * equivalentObject,
|
|
+ const YCHAR * aliasString, __u32 rdev)
|
|
+{
|
|
+ yaffs_Object *in;
|
|
+ YCHAR *str;
|
|
+
|
|
+ yaffs_Device *dev = parent->myDev;
|
|
+
|
|
+ /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
|
|
+ if (yaffs_FindObjectByName(parent, name)) {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ in = yaffs_CreateNewObject(dev, -1, type);
|
|
+
|
|
+ if(type == YAFFS_OBJECT_TYPE_SYMLINK){
|
|
+ str = yaffs_CloneString(aliasString);
|
|
+ if(!str){
|
|
+ yaffs_FreeObject(in);
|
|
+ return NULL;
|
|
+ }
|
|
+ }
|
|
+
|
|
+
|
|
+
|
|
+ if (in) {
|
|
+ in->chunkId = -1;
|
|
+ in->valid = 1;
|
|
+ in->variantType = type;
|
|
+
|
|
+ in->yst_mode = mode;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_WinFileTimeNow(in->win_atime);
|
|
+ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
|
|
+ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
|
|
+
|
|
+#else
|
|
+ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
|
|
+
|
|
+ in->yst_rdev = rdev;
|
|
+ in->yst_uid = uid;
|
|
+ in->yst_gid = gid;
|
|
+#endif
|
|
+ in->nDataChunks = 0;
|
|
+
|
|
+ yaffs_SetObjectName(in, name);
|
|
+ in->dirty = 1;
|
|
+
|
|
+ yaffs_AddObjectToDirectory(parent, in);
|
|
+
|
|
+ in->myDev = parent->myDev;
|
|
+
|
|
+ switch (type) {
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ in->variant.symLinkVariant.alias = str;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ in->variant.hardLinkVariant.equivalentObject =
|
|
+ equivalentObject;
|
|
+ in->variant.hardLinkVariant.equivalentObjectId =
|
|
+ equivalentObject->objectId;
|
|
+ list_add(&in->hardLinks, &equivalentObject->hardLinks);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ /* do nothing */
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
|
|
+ /* Could not create the object header, fail the creation */
|
|
+ yaffs_DestroyObject(in);
|
|
+ in = NULL;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return in;
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid)
|
|
+{
|
|
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
|
|
+ uid, gid, NULL, NULL, 0);
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid)
|
|
+{
|
|
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
|
|
+ mode, uid, gid, NULL, NULL, 0);
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
|
|
+{
|
|
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
|
|
+ uid, gid, NULL, NULL, rdev);
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid,
|
|
+ const YCHAR * alias)
|
|
+{
|
|
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
|
|
+ uid, gid, NULL, alias, 0);
|
|
+}
|
|
+
|
|
+/* yaffs_Link returns the object id of the equivalent object.*/
|
|
+yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
|
|
+ yaffs_Object * equivalentObject)
|
|
+{
|
|
+ /* Get the real object in case we were fed a hard link as an equivalent object */
|
|
+ equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
|
|
+
|
|
+ if (yaffs_MknodObject
|
|
+ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
|
|
+ equivalentObject, NULL, 0)) {
|
|
+ return equivalentObject;
|
|
+ } else {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir,
|
|
+ const YCHAR * newName, int force, int shadows)
|
|
+{
|
|
+ int unlinkOp;
|
|
+ int deleteOp;
|
|
+
|
|
+ yaffs_Object *existingTarget;
|
|
+
|
|
+ if (newDir == NULL) {
|
|
+ newDir = obj->parent; /* use the old directory */
|
|
+ }
|
|
+
|
|
+ if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragendy: yaffs_ChangeObjectName: newDir is not a directory"
|
|
+ TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
|
|
+ if (obj->myDev->isYaffs2) {
|
|
+ unlinkOp = (newDir == obj->myDev->unlinkedDir);
|
|
+ } else {
|
|
+ unlinkOp = (newDir == obj->myDev->unlinkedDir
|
|
+ && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
|
|
+ }
|
|
+
|
|
+ deleteOp = (newDir == obj->myDev->deletedDir);
|
|
+
|
|
+ existingTarget = yaffs_FindObjectByName(newDir, newName);
|
|
+
|
|
+ /* If the object is a file going into the unlinked directory,
|
|
+ * then it is OK to just stuff it in since duplicate names are allowed.
|
|
+ * else only proceed if the new name does not exist and if we're putting
|
|
+ * it into a directory.
|
|
+ */
|
|
+ if ((unlinkOp ||
|
|
+ deleteOp ||
|
|
+ force ||
|
|
+ (shadows > 0) ||
|
|
+ !existingTarget) &&
|
|
+ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
+ yaffs_SetObjectName(obj, newName);
|
|
+ obj->dirty = 1;
|
|
+
|
|
+ yaffs_AddObjectToDirectory(newDir, obj);
|
|
+
|
|
+ if (unlinkOp)
|
|
+ obj->unlinked = 1;
|
|
+
|
|
+ /* If it is a deletion then we mark it as a shrink for gc purposes. */
|
|
+ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows)>= 0)
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
|
|
+ yaffs_Object * newDir, const YCHAR * newName)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_Object *existingTarget;
|
|
+ int force = 0;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
|
|
+ /* Special case for case insemsitive systems (eg. WinCE).
|
|
+ * While look-up is case insensitive, the name isn't.
|
|
+ * Therefore we might want to change x.txt to X.txt
|
|
+ */
|
|
+ if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) {
|
|
+ force = 1;
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ obj = yaffs_FindObjectByName(oldDir, oldName);
|
|
+ /* Check new name to long. */
|
|
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK &&
|
|
+ yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH)
|
|
+ /* ENAMETOOLONG */
|
|
+ return YAFFS_FAIL;
|
|
+ else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK &&
|
|
+ yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
|
|
+ /* ENAMETOOLONG */
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+ if (obj && obj->renameAllowed) {
|
|
+
|
|
+ /* Now do the handling for an existing target, if there is one */
|
|
+
|
|
+ existingTarget = yaffs_FindObjectByName(newDir, newName);
|
|
+ if (existingTarget &&
|
|
+ existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
|
|
+ !list_empty(&existingTarget->variant.directoryVariant.children)) {
|
|
+ /* There is a target that is a non-empty directory, so we fail */
|
|
+ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
|
|
+ } else if (existingTarget && existingTarget != obj) {
|
|
+ /* Nuke the target first, using shadowing,
|
|
+ * but only if it isn't the same object
|
|
+ */
|
|
+ yaffs_ChangeObjectName(obj, newDir, newName, force,
|
|
+ existingTarget->objectId);
|
|
+ yaffs_UnlinkObject(existingTarget);
|
|
+ }
|
|
+
|
|
+ return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
|
|
+ }
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+/*------------------------- Block Management and Page Allocation ----------------*/
|
|
+
|
|
+static int yaffs_InitialiseBlocks(yaffs_Device * dev)
|
|
+{
|
|
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
|
|
+
|
|
+ dev->blockInfo = NULL;
|
|
+ dev->chunkBits = NULL;
|
|
+
|
|
+ dev->allocationBlock = -1; /* force it to get a new one */
|
|
+
|
|
+ /* If the first allocation strategy fails, thry the alternate one */
|
|
+ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
|
|
+ if(!dev->blockInfo){
|
|
+ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
|
|
+ dev->blockInfoAlt = 1;
|
|
+ }
|
|
+ else
|
|
+ dev->blockInfoAlt = 0;
|
|
+
|
|
+ if(dev->blockInfo){
|
|
+
|
|
+ /* Set up dynamic blockinfo stuff. */
|
|
+ dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
|
|
+ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
|
|
+ if(!dev->chunkBits){
|
|
+ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
|
|
+ dev->chunkBitsAlt = 1;
|
|
+ }
|
|
+ else
|
|
+ dev->chunkBitsAlt = 0;
|
|
+ }
|
|
+
|
|
+ if (dev->blockInfo && dev->chunkBits) {
|
|
+ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
|
|
+ memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_DeinitialiseBlocks(yaffs_Device * dev)
|
|
+{
|
|
+ if(dev->blockInfoAlt && dev->blockInfo)
|
|
+ YFREE_ALT(dev->blockInfo);
|
|
+ else if(dev->blockInfo)
|
|
+ YFREE(dev->blockInfo);
|
|
+
|
|
+ dev->blockInfoAlt = 0;
|
|
+
|
|
+ dev->blockInfo = NULL;
|
|
+
|
|
+ if(dev->chunkBitsAlt && dev->chunkBits)
|
|
+ YFREE_ALT(dev->chunkBits);
|
|
+ else if(dev->chunkBits)
|
|
+ YFREE(dev->chunkBits);
|
|
+ dev->chunkBitsAlt = 0;
|
|
+ dev->chunkBits = NULL;
|
|
+}
|
|
+
|
|
+static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev,
|
|
+ yaffs_BlockInfo * bi)
|
|
+{
|
|
+ int i;
|
|
+ __u32 seq;
|
|
+ yaffs_BlockInfo *b;
|
|
+
|
|
+ if (!dev->isYaffs2)
|
|
+ return 1; /* disqualification only applies to yaffs2. */
|
|
+
|
|
+ if (!bi->hasShrinkHeader)
|
|
+ return 1; /* can gc */
|
|
+
|
|
+ /* Find the oldest dirty sequence number if we don't know it and save it
|
|
+ * so we don't have to keep recomputing it.
|
|
+ */
|
|
+ if (!dev->oldestDirtySequence) {
|
|
+ seq = dev->sequenceNumber;
|
|
+
|
|
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
|
|
+ i++) {
|
|
+ b = yaffs_GetBlockInfo(dev, i);
|
|
+ if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
|
|
+ (b->pagesInUse - b->softDeletions) <
|
|
+ dev->nChunksPerBlock && b->sequenceNumber < seq) {
|
|
+ seq = b->sequenceNumber;
|
|
+ }
|
|
+ }
|
|
+ dev->oldestDirtySequence = seq;
|
|
+ }
|
|
+
|
|
+ /* Can't do gc of this block if there are any blocks older than this one that have
|
|
+ * discarded pages.
|
|
+ */
|
|
+ return (bi->sequenceNumber <= dev->oldestDirtySequence);
|
|
+
|
|
+}
|
|
+
|
|
+/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
|
|
+ * for garbage collection.
|
|
+ */
|
|
+
|
|
+static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
|
|
+ int aggressive)
|
|
+{
|
|
+
|
|
+ int b = dev->currentDirtyChecker;
|
|
+
|
|
+ int i;
|
|
+ int iterations;
|
|
+ int dirtiest = -1;
|
|
+ int pagesInUse = 0;
|
|
+ int prioritised=0;
|
|
+ yaffs_BlockInfo *bi;
|
|
+ int pendingPrioritisedExist = 0;
|
|
+
|
|
+ /* First let's see if we need to grab a prioritised block */
|
|
+ if(dev->hasPendingPrioritisedGCs){
|
|
+ for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){
|
|
+
|
|
+ bi = yaffs_GetBlockInfo(dev, i);
|
|
+ //yaffs_VerifyBlock(dev,bi,i);
|
|
+
|
|
+ if(bi->gcPrioritise) {
|
|
+ pendingPrioritisedExist = 1;
|
|
+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
|
|
+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)){
|
|
+ pagesInUse = (bi->pagesInUse - bi->softDeletions);
|
|
+ dirtiest = i;
|
|
+ prioritised = 1;
|
|
+ aggressive = 1; /* Fool the non-aggressive skip logiv below */
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if(!pendingPrioritisedExist) /* None found, so we can clear this */
|
|
+ dev->hasPendingPrioritisedGCs = 0;
|
|
+ }
|
|
+
|
|
+ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
|
|
+ * search harder.
|
|
+ * else (we're doing a leasurely gc), then we only bother to do this if the
|
|
+ * block has only a few pages in use.
|
|
+ */
|
|
+
|
|
+ dev->nonAggressiveSkip--;
|
|
+
|
|
+ if (!aggressive && (dev->nonAggressiveSkip > 0)) {
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ if(!prioritised)
|
|
+ pagesInUse =
|
|
+ (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
|
|
+
|
|
+ if (aggressive) {
|
|
+ iterations =
|
|
+ dev->internalEndBlock - dev->internalStartBlock + 1;
|
|
+ } else {
|
|
+ iterations =
|
|
+ dev->internalEndBlock - dev->internalStartBlock + 1;
|
|
+ iterations = iterations / 16;
|
|
+ if (iterations > 200) {
|
|
+ iterations = 200;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
|
|
+ b++;
|
|
+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
|
|
+ b = dev->internalStartBlock;
|
|
+ }
|
|
+
|
|
+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("**>> Block %d is not valid" TENDSTR), b));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ bi = yaffs_GetBlockInfo(dev, b);
|
|
+
|
|
+#if 0
|
|
+ if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
|
|
+ dirtiest = b;
|
|
+ pagesInUse = 0;
|
|
+ }
|
|
+ else
|
|
+#endif
|
|
+
|
|
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
|
|
+ (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
|
|
+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
|
|
+ dirtiest = b;
|
|
+ pagesInUse = (bi->pagesInUse - bi->softDeletions);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ dev->currentDirtyChecker = b;
|
|
+
|
|
+ if (dirtiest > 0) {
|
|
+ T(YAFFS_TRACE_GC,
|
|
+ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
|
|
+ dev->nChunksPerBlock - pagesInUse,prioritised));
|
|
+ }
|
|
+
|
|
+ dev->oldestDirtySequence = 0;
|
|
+
|
|
+ if (dirtiest > 0) {
|
|
+ dev->nonAggressiveSkip = 4;
|
|
+ }
|
|
+
|
|
+ return dirtiest;
|
|
+}
|
|
+
|
|
+static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo)
|
|
+{
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
|
|
+
|
|
+ int erasedOk = 0;
|
|
+
|
|
+ /* If the block is still healthy erase it and mark as clean.
|
|
+ * If the block has had a data failure, then retire it.
|
|
+ */
|
|
+
|
|
+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
|
|
+ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
|
|
+ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
|
|
+
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
|
|
+
|
|
+ if (!bi->needsRetiring) {
|
|
+ yaffs_InvalidateCheckpoint(dev);
|
|
+ erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
|
|
+ if (!erasedOk) {
|
|
+ dev->nErasureFailures++;
|
|
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
|
|
+ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (erasedOk &&
|
|
+ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
|
|
+ int i;
|
|
+ for (i = 0; i < dev->nChunksPerBlock; i++) {
|
|
+ if (!yaffs_CheckChunkErased
|
|
+ (dev, blockNo * dev->nChunksPerBlock + i)) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ (">>Block %d erasure supposedly OK, but chunk %d not erased"
|
|
+ TENDSTR), blockNo, i));
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (erasedOk) {
|
|
+ /* Clean it up... */
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ dev->nErasedBlocks++;
|
|
+ bi->pagesInUse = 0;
|
|
+ bi->softDeletions = 0;
|
|
+ bi->hasShrinkHeader = 0;
|
|
+ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
|
|
+ bi->gcPrioritise = 0;
|
|
+ yaffs_ClearChunkBits(dev, blockNo);
|
|
+
|
|
+ T(YAFFS_TRACE_ERASE,
|
|
+ (TSTR("Erased block %d" TENDSTR), blockNo));
|
|
+ } else {
|
|
+ dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
|
|
+
|
|
+ yaffs_RetireBlock(dev, blockNo);
|
|
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
|
|
+ (TSTR("**>> Block %d retired" TENDSTR), blockNo));
|
|
+ }
|
|
+}
|
|
+
|
|
+static int yaffs_FindBlockForAllocation(yaffs_Device * dev)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ yaffs_BlockInfo *bi;
|
|
+
|
|
+ if (dev->nErasedBlocks < 1) {
|
|
+ /* Hoosterman we've got a problem.
|
|
+ * Can't get space to gc
|
|
+ */
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR)));
|
|
+
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ /* Find an empty block. */
|
|
+
|
|
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
|
|
+ dev->allocationBlockFinder++;
|
|
+ if (dev->allocationBlockFinder < dev->internalStartBlock
|
|
+ || dev->allocationBlockFinder > dev->internalEndBlock) {
|
|
+ dev->allocationBlockFinder = dev->internalStartBlock;
|
|
+ }
|
|
+
|
|
+ bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
|
|
+
|
|
+ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
|
|
+ dev->sequenceNumber++;
|
|
+ bi->sequenceNumber = dev->sequenceNumber;
|
|
+ dev->nErasedBlocks--;
|
|
+ T(YAFFS_TRACE_ALLOCATE,
|
|
+ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
|
|
+ dev->allocationBlockFinder, dev->sequenceNumber,
|
|
+ dev->nErasedBlocks));
|
|
+ return dev->allocationBlockFinder;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("yaffs tragedy: no more eraased blocks, but there should have been %d"
|
|
+ TENDSTR), dev->nErasedBlocks));
|
|
+
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+
|
|
+// Check if there's space to allocate...
|
|
+// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
|
|
+static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev)
|
|
+{
|
|
+ int reservedChunks;
|
|
+ int reservedBlocks = dev->nReservedBlocks;
|
|
+ int checkpointBlocks;
|
|
+
|
|
+ checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
|
|
+ if(checkpointBlocks < 0)
|
|
+ checkpointBlocks = 0;
|
|
+
|
|
+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
|
|
+
|
|
+ return (dev->nFreeChunks > reservedChunks);
|
|
+}
|
|
+
|
|
+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr)
|
|
+{
|
|
+ int retVal;
|
|
+ yaffs_BlockInfo *bi;
|
|
+
|
|
+ if (dev->allocationBlock < 0) {
|
|
+ /* Get next block to allocate off */
|
|
+ dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
|
|
+ dev->allocationPage = 0;
|
|
+ }
|
|
+
|
|
+ if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
|
|
+ /* Not enough space to allocate unless we're allowed to use the reserve. */
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ if (dev->nErasedBlocks < dev->nReservedBlocks
|
|
+ && dev->allocationPage == 0) {
|
|
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
|
|
+ }
|
|
+
|
|
+ /* Next page please.... */
|
|
+ if (dev->allocationBlock >= 0) {
|
|
+ bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
|
|
+
|
|
+ retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
|
|
+ dev->allocationPage;
|
|
+ bi->pagesInUse++;
|
|
+ yaffs_SetChunkBit(dev, dev->allocationBlock,
|
|
+ dev->allocationPage);
|
|
+
|
|
+ dev->allocationPage++;
|
|
+
|
|
+ dev->nFreeChunks--;
|
|
+
|
|
+ /* If the block is full set the state to full */
|
|
+ if (dev->allocationPage >= dev->nChunksPerBlock) {
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
|
|
+ dev->allocationBlock = -1;
|
|
+ }
|
|
+
|
|
+ if(blockUsedPtr)
|
|
+ *blockUsedPtr = bi;
|
|
+
|
|
+ return retVal;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
|
|
+
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+static int yaffs_GetErasedChunks(yaffs_Device * dev)
|
|
+{
|
|
+ int n;
|
|
+
|
|
+ n = dev->nErasedBlocks * dev->nChunksPerBlock;
|
|
+
|
|
+ if (dev->allocationBlock > 0) {
|
|
+ n += (dev->nChunksPerBlock - dev->allocationPage);
|
|
+ }
|
|
+
|
|
+ return n;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
|
|
+{
|
|
+ int oldChunk;
|
|
+ int newChunk;
|
|
+ int chunkInBlock;
|
|
+ int markNAND;
|
|
+ int retVal = YAFFS_OK;
|
|
+ int cleanups = 0;
|
|
+ int i;
|
|
+ int isCheckpointBlock;
|
|
+ int matchingChunk;
|
|
+
|
|
+ int chunksBefore = yaffs_GetErasedChunks(dev);
|
|
+ int chunksAfter;
|
|
+
|
|
+ yaffs_ExtendedTags tags;
|
|
+
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
|
|
+
|
|
+ yaffs_Object *object;
|
|
+
|
|
+ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
|
|
+
|
|
+ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
|
|
+
|
|
+ T(YAFFS_TRACE_TRACING,
|
|
+ (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block,
|
|
+ bi->pagesInUse, bi->hasShrinkHeader));
|
|
+
|
|
+ /*yaffs_VerifyFreeChunks(dev); */
|
|
+
|
|
+ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
|
|
+
|
|
+ /* Take off the number of soft deleted entries because
|
|
+ * they're going to get really deleted during GC.
|
|
+ */
|
|
+ dev->nFreeChunks -= bi->softDeletions;
|
|
+
|
|
+ dev->isDoingGC = 1;
|
|
+
|
|
+ if (isCheckpointBlock ||
|
|
+ !yaffs_StillSomeChunkBits(dev, block)) {
|
|
+ T(YAFFS_TRACE_TRACING,
|
|
+ (TSTR
|
|
+ ("Collecting block %d that has no chunks in use" TENDSTR),
|
|
+ block));
|
|
+ yaffs_BlockBecameDirty(dev, block);
|
|
+ } else {
|
|
+
|
|
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ yaffs_VerifyBlock(dev,bi,block);
|
|
+
|
|
+ for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock;
|
|
+ chunkInBlock < dev->nChunksPerBlock
|
|
+ && yaffs_StillSomeChunkBits(dev, block);
|
|
+ chunkInBlock++, oldChunk++) {
|
|
+ if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) {
|
|
+
|
|
+ /* This page is in use and might need to be copied off */
|
|
+
|
|
+ markNAND = 1;
|
|
+
|
|
+ yaffs_InitialiseTags(&tags);
|
|
+
|
|
+ yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
|
|
+ buffer, &tags);
|
|
+
|
|
+ object =
|
|
+ yaffs_FindObjectByNumber(dev,
|
|
+ tags.objectId);
|
|
+
|
|
+ T(YAFFS_TRACE_GC_DETAIL,
|
|
+ (TSTR
|
|
+ ("Collecting page %d, %d %d %d " TENDSTR),
|
|
+ chunkInBlock, tags.objectId, tags.chunkId,
|
|
+ tags.byteCount));
|
|
+
|
|
+ if(object && !yaffs_SkipVerification(dev)){
|
|
+ if(tags.chunkId == 0)
|
|
+ matchingChunk = object->chunkId;
|
|
+ else if(object->softDeleted)
|
|
+ matchingChunk = oldChunk; /* Defeat the test */
|
|
+ else
|
|
+ matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL);
|
|
+
|
|
+ if(oldChunk != matchingChunk)
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
|
|
+ oldChunk,matchingChunk,tags.objectId, tags.chunkId));
|
|
+
|
|
+ }
|
|
+
|
|
+ if (!object) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("page %d in gc has no object: %d %d %d "
|
|
+ TENDSTR), oldChunk,
|
|
+ tags.objectId, tags.chunkId, tags.byteCount));
|
|
+ }
|
|
+
|
|
+ if (object && object->deleted
|
|
+ && tags.chunkId != 0) {
|
|
+ /* Data chunk in a deleted file, throw it away
|
|
+ * It's a soft deleted data chunk,
|
|
+ * No need to copy this, just forget about it and
|
|
+ * fix up the object.
|
|
+ */
|
|
+
|
|
+ object->nDataChunks--;
|
|
+
|
|
+ if (object->nDataChunks <= 0) {
|
|
+ /* remeber to clean up the object */
|
|
+ dev->gcCleanupList[cleanups] =
|
|
+ tags.objectId;
|
|
+ cleanups++;
|
|
+ }
|
|
+ markNAND = 0;
|
|
+ } else if (0
|
|
+ /* Todo object && object->deleted && object->nDataChunks == 0 */
|
|
+ ) {
|
|
+ /* Deleted object header with no data chunks.
|
|
+ * Can be discarded and the file deleted.
|
|
+ */
|
|
+ object->chunkId = 0;
|
|
+ yaffs_FreeTnode(object->myDev,
|
|
+ object->variant.
|
|
+ fileVariant.top);
|
|
+ object->variant.fileVariant.top = NULL;
|
|
+ yaffs_DoGenericObjectDeletion(object);
|
|
+
|
|
+ } else if (object) {
|
|
+ /* It's either a data chunk in a live file or
|
|
+ * an ObjectHeader, so we're interested in it.
|
|
+ * NB Need to keep the ObjectHeaders of deleted files
|
|
+ * until the whole file has been deleted off
|
|
+ */
|
|
+ tags.serialNumber++;
|
|
+
|
|
+ dev->nGCCopies++;
|
|
+
|
|
+ if (tags.chunkId == 0) {
|
|
+ /* It is an object Id,
|
|
+ * We need to nuke the shrinkheader flags first
|
|
+ * We no longer want the shrinkHeader flag since its work is done
|
|
+ * and if it is left in place it will mess up scanning.
|
|
+ * Also, clear out any shadowing stuff
|
|
+ */
|
|
+
|
|
+ yaffs_ObjectHeader *oh;
|
|
+ oh = (yaffs_ObjectHeader *)buffer;
|
|
+ oh->isShrink = 0;
|
|
+ oh->shadowsObject = -1;
|
|
+ tags.extraShadows = 0;
|
|
+ tags.extraIsShrinkHeader = 0;
|
|
+
|
|
+ yaffs_VerifyObjectHeader(object,oh,&tags,1);
|
|
+ }
|
|
+
|
|
+ newChunk =
|
|
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
|
|
+
|
|
+ if (newChunk < 0) {
|
|
+ retVal = YAFFS_FAIL;
|
|
+ } else {
|
|
+
|
|
+ /* Ok, now fix up the Tnodes etc. */
|
|
+
|
|
+ if (tags.chunkId == 0) {
|
|
+ /* It's a header */
|
|
+ object->chunkId = newChunk;
|
|
+ object->serial = tags.serialNumber;
|
|
+ } else {
|
|
+ /* It's a data chunk */
|
|
+ yaffs_PutChunkIntoFile
|
|
+ (object,
|
|
+ tags.chunkId,
|
|
+ newChunk, 0);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
|
|
+
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
|
|
+
|
|
+
|
|
+ /* Do any required cleanups */
|
|
+ for (i = 0; i < cleanups; i++) {
|
|
+ /* Time to delete the file too */
|
|
+ object =
|
|
+ yaffs_FindObjectByNumber(dev,
|
|
+ dev->gcCleanupList[i]);
|
|
+ if (object) {
|
|
+ yaffs_FreeTnode(dev,
|
|
+ object->variant.fileVariant.
|
|
+ top);
|
|
+ object->variant.fileVariant.top = NULL;
|
|
+ T(YAFFS_TRACE_GC,
|
|
+ (TSTR
|
|
+ ("yaffs: About to finally delete object %d"
|
|
+ TENDSTR), object->objectId));
|
|
+ yaffs_DoGenericObjectDeletion(object);
|
|
+ object->myDev->nDeletedFiles--;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ yaffs_VerifyCollectedBlock(dev,bi,block);
|
|
+
|
|
+ if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) {
|
|
+ T(YAFFS_TRACE_GC,
|
|
+ (TSTR
|
|
+ ("gc did not increase free chunks before %d after %d"
|
|
+ TENDSTR), chunksBefore, chunksAfter));
|
|
+ }
|
|
+
|
|
+ dev->isDoingGC = 0;
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* New garbage collector
|
|
+ * If we're very low on erased blocks then we do aggressive garbage collection
|
|
+ * otherwise we do "leasurely" garbage collection.
|
|
+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
|
|
+ * Passive gc only inspects smaller areas and will only accept more dirty blocks.
|
|
+ *
|
|
+ * The idea is to help clear out space in a more spread-out manner.
|
|
+ * Dunno if it really does anything useful.
|
|
+ */
|
|
+static int yaffs_CheckGarbageCollection(yaffs_Device * dev)
|
|
+{
|
|
+ int block;
|
|
+ int aggressive;
|
|
+ int gcOk = YAFFS_OK;
|
|
+ int maxTries = 0;
|
|
+
|
|
+ int checkpointBlockAdjust;
|
|
+
|
|
+ if (dev->isDoingGC) {
|
|
+ /* Bail out so we don't get recursive gc */
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+
|
|
+ /* This loop should pass the first time.
|
|
+ * We'll only see looping here if the erase of the collected block fails.
|
|
+ */
|
|
+
|
|
+ do {
|
|
+ maxTries++;
|
|
+
|
|
+ checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint);
|
|
+ if(checkpointBlockAdjust < 0)
|
|
+ checkpointBlockAdjust = 0;
|
|
+
|
|
+ if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
|
|
+ /* We need a block soon...*/
|
|
+ aggressive = 1;
|
|
+ } else {
|
|
+ /* We're in no hurry */
|
|
+ aggressive = 0;
|
|
+ }
|
|
+
|
|
+ block = yaffs_FindBlockForGarbageCollection(dev, aggressive);
|
|
+
|
|
+ if (block > 0) {
|
|
+ dev->garbageCollections++;
|
|
+ if (!aggressive) {
|
|
+ dev->passiveGarbageCollections++;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_GC,
|
|
+ (TSTR
|
|
+ ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
|
|
+ dev->nErasedBlocks, aggressive));
|
|
+
|
|
+ gcOk = yaffs_GarbageCollectBlock(dev, block);
|
|
+ }
|
|
+
|
|
+ if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
|
|
+ T(YAFFS_TRACE_GC,
|
|
+ (TSTR
|
|
+ ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
|
|
+ TENDSTR), dev->nErasedBlocks, maxTries, block));
|
|
+ }
|
|
+ } while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0)
|
|
+ && (maxTries < 2));
|
|
+
|
|
+ return aggressive ? gcOk : YAFFS_OK;
|
|
+}
|
|
+
|
|
+/*------------------------- TAGS --------------------------------*/
|
|
+
|
|
+static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
|
|
+ int chunkInObject)
|
|
+{
|
|
+ return (tags->chunkId == chunkInObject &&
|
|
+ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+/*-------------------- Data file manipulation -----------------*/
|
|
+
|
|
+static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
|
|
+ yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ /*Get the Tnode, then get the level 0 offset chunk offset */
|
|
+ yaffs_Tnode *tn;
|
|
+ int theChunk = -1;
|
|
+ yaffs_ExtendedTags localTags;
|
|
+ int retVal = -1;
|
|
+
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ if (!tags) {
|
|
+ /* Passed a NULL, so use our own tags space */
|
|
+ tags = &localTags;
|
|
+ }
|
|
+
|
|
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
|
|
+
|
|
+ if (tn) {
|
|
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
|
|
+
|
|
+ retVal =
|
|
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
|
|
+ chunkInInode);
|
|
+ }
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode,
|
|
+ yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ /* Get the Tnode, then get the level 0 offset chunk offset */
|
|
+ yaffs_Tnode *tn;
|
|
+ int theChunk = -1;
|
|
+ yaffs_ExtendedTags localTags;
|
|
+
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+ int retVal = -1;
|
|
+
|
|
+ if (!tags) {
|
|
+ /* Passed a NULL, so use our own tags space */
|
|
+ tags = &localTags;
|
|
+ }
|
|
+
|
|
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
|
|
+
|
|
+ if (tn) {
|
|
+
|
|
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
|
|
+
|
|
+ retVal =
|
|
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
|
|
+ chunkInInode);
|
|
+
|
|
+ /* Delete the entry in the filestructure (if found) */
|
|
+ if (retVal != -1) {
|
|
+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0);
|
|
+ }
|
|
+ } else {
|
|
+ /*T(("No level 0 found for %d\n", chunkInInode)); */
|
|
+ }
|
|
+
|
|
+ if (retVal == -1) {
|
|
+ /* T(("Could not find %d to delete\n",chunkInInode)); */
|
|
+ }
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+#ifdef YAFFS_PARANOID
|
|
+
|
|
+static int yaffs_CheckFileSanity(yaffs_Object * in)
|
|
+{
|
|
+ int chunk;
|
|
+ int nChunks;
|
|
+ int fSize;
|
|
+ int failed = 0;
|
|
+ int objId;
|
|
+ yaffs_Tnode *tn;
|
|
+ yaffs_Tags localTags;
|
|
+ yaffs_Tags *tags = &localTags;
|
|
+ int theChunk;
|
|
+ int chunkDeleted;
|
|
+
|
|
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
|
|
+ /* T(("Object not a file\n")); */
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ objId = in->objectId;
|
|
+ fSize = in->variant.fileVariant.fileSize;
|
|
+ nChunks =
|
|
+ (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
|
|
+
|
|
+ for (chunk = 1; chunk <= nChunks; chunk++) {
|
|
+ tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
|
|
+ chunk);
|
|
+
|
|
+ if (tn) {
|
|
+
|
|
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk);
|
|
+
|
|
+ if (yaffs_CheckChunkBits
|
|
+ (dev, theChunk / dev->nChunksPerBlock,
|
|
+ theChunk % dev->nChunksPerBlock)) {
|
|
+
|
|
+ yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
|
|
+ tags,
|
|
+ &chunkDeleted);
|
|
+ if (yaffs_TagsMatch
|
|
+ (tags, in->objectId, chunk, chunkDeleted)) {
|
|
+ /* found it; */
|
|
+
|
|
+ }
|
|
+ } else {
|
|
+
|
|
+ failed = 1;
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+ /* T(("No level 0 found for %d\n", chunk)); */
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return failed ? YAFFS_FAIL : YAFFS_OK;
|
|
+}
|
|
+
|
|
+#endif
|
|
+
|
|
+static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
|
|
+ int chunkInNAND, int inScan)
|
|
+{
|
|
+ /* NB inScan is zero unless scanning.
|
|
+ * For forward scanning, inScan is > 0;
|
|
+ * for backward scanning inScan is < 0
|
|
+ */
|
|
+
|
|
+ yaffs_Tnode *tn;
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+ int existingChunk;
|
|
+ yaffs_ExtendedTags existingTags;
|
|
+ yaffs_ExtendedTags newTags;
|
|
+ unsigned existingSerial, newSerial;
|
|
+
|
|
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
|
|
+ /* Just ignore an attempt at putting a chunk into a non-file during scanning
|
|
+ * If it is not during Scanning then something went wrong!
|
|
+ */
|
|
+ if (!inScan) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("yaffs tragedy:attempt to put data chunk into a non-file"
|
|
+ TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+
|
|
+ tn = yaffs_AddOrFindLevel0Tnode(dev,
|
|
+ &in->variant.fileVariant,
|
|
+ chunkInInode,
|
|
+ NULL);
|
|
+ if (!tn) {
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
|
|
+
|
|
+ if (inScan != 0) {
|
|
+ /* If we're scanning then we need to test for duplicates
|
|
+ * NB This does not need to be efficient since it should only ever
|
|
+ * happen when the power fails during a write, then only one
|
|
+ * chunk should ever be affected.
|
|
+ *
|
|
+ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
|
|
+ * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
|
|
+ */
|
|
+
|
|
+ if (existingChunk != 0) {
|
|
+ /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
|
|
+ * thus we have to do a FindChunkInFile to get the real chunk id.
|
|
+ *
|
|
+ * We have a duplicate now we need to decide which one to use:
|
|
+ *
|
|
+ * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
|
|
+ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
|
|
+ * YAFFS1: Get both sets of tags and compare serial numbers.
|
|
+ */
|
|
+
|
|
+ if (inScan > 0) {
|
|
+ /* Only do this for forward scanning */
|
|
+ yaffs_ReadChunkWithTagsFromNAND(dev,
|
|
+ chunkInNAND,
|
|
+ NULL, &newTags);
|
|
+
|
|
+ /* Do a proper find */
|
|
+ existingChunk =
|
|
+ yaffs_FindChunkInFile(in, chunkInInode,
|
|
+ &existingTags);
|
|
+ }
|
|
+
|
|
+ if (existingChunk <= 0) {
|
|
+ /*Hoosterman - how did this happen? */
|
|
+
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("yaffs tragedy: existing chunk < 0 in scan"
|
|
+ TENDSTR)));
|
|
+
|
|
+ }
|
|
+
|
|
+ /* NB The deleted flags should be false, otherwise the chunks will
|
|
+ * not be loaded during a scan
|
|
+ */
|
|
+
|
|
+ newSerial = newTags.serialNumber;
|
|
+ existingSerial = existingTags.serialNumber;
|
|
+
|
|
+ if ((inScan > 0) &&
|
|
+ (in->myDev->isYaffs2 ||
|
|
+ existingChunk <= 0 ||
|
|
+ ((existingSerial + 1) & 3) == newSerial)) {
|
|
+ /* Forward scanning.
|
|
+ * Use new
|
|
+ * Delete the old one and drop through to update the tnode
|
|
+ */
|
|
+ yaffs_DeleteChunk(dev, existingChunk, 1,
|
|
+ __LINE__);
|
|
+ } else {
|
|
+ /* Backward scanning or we want to use the existing one
|
|
+ * Use existing.
|
|
+ * Delete the new one and return early so that the tnode isn't changed
|
|
+ */
|
|
+ yaffs_DeleteChunk(dev, chunkInNAND, 1,
|
|
+ __LINE__);
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ if (existingChunk == 0) {
|
|
+ in->nDataChunks++;
|
|
+ }
|
|
+
|
|
+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND);
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode,
|
|
+ __u8 * buffer)
|
|
+{
|
|
+ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
|
|
+
|
|
+ if (chunkInNAND >= 0) {
|
|
+ return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
|
|
+ buffer,NULL);
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_NANDACCESS,
|
|
+ (TSTR("Chunk %d not found zero instead" TENDSTR),
|
|
+ chunkInNAND));
|
|
+ /* get sane (zero) data if you read a hole */
|
|
+ memset(buffer, 0, in->myDev->nDataBytesPerChunk);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn)
|
|
+{
|
|
+ int block;
|
|
+ int page;
|
|
+ yaffs_ExtendedTags tags;
|
|
+ yaffs_BlockInfo *bi;
|
|
+
|
|
+ if (chunkId <= 0)
|
|
+ return;
|
|
+
|
|
+
|
|
+ dev->nDeletions++;
|
|
+ block = chunkId / dev->nChunksPerBlock;
|
|
+ page = chunkId % dev->nChunksPerBlock;
|
|
+
|
|
+
|
|
+ if(!yaffs_CheckChunkBit(dev,block,page))
|
|
+ T(YAFFS_TRACE_VERIFY,
|
|
+ (TSTR("Deleting invalid chunk %d"TENDSTR),
|
|
+ chunkId));
|
|
+
|
|
+ bi = yaffs_GetBlockInfo(dev, block);
|
|
+
|
|
+ T(YAFFS_TRACE_DELETION,
|
|
+ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
|
|
+
|
|
+ if (markNAND &&
|
|
+ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
|
|
+
|
|
+ yaffs_InitialiseTags(&tags);
|
|
+
|
|
+ tags.chunkDeleted = 1;
|
|
+
|
|
+ yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
|
|
+ yaffs_HandleUpdateChunk(dev, chunkId, &tags);
|
|
+ } else {
|
|
+ dev->nUnmarkedDeletions++;
|
|
+ }
|
|
+
|
|
+ /* Pull out of the management area.
|
|
+ * If the whole block became dirty, this will kick off an erasure.
|
|
+ */
|
|
+ if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
|
|
+ bi->blockState == YAFFS_BLOCK_STATE_FULL ||
|
|
+ bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
|
|
+ bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
|
|
+ dev->nFreeChunks++;
|
|
+
|
|
+ yaffs_ClearChunkBit(dev, block, page);
|
|
+
|
|
+ bi->pagesInUse--;
|
|
+
|
|
+ if (bi->pagesInUse == 0 &&
|
|
+ !bi->hasShrinkHeader &&
|
|
+ bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
|
|
+ bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
+ yaffs_BlockBecameDirty(dev, block);
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+ /* T(("Bad news deleting chunk %d\n",chunkId)); */
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode,
|
|
+ const __u8 * buffer, int nBytes,
|
|
+ int useReserve)
|
|
+{
|
|
+ /* Find old chunk Need to do this to get serial number
|
|
+ * Write new one and patch into tree.
|
|
+ * Invalidate old tags.
|
|
+ */
|
|
+
|
|
+ int prevChunkId;
|
|
+ yaffs_ExtendedTags prevTags;
|
|
+
|
|
+ int newChunkId;
|
|
+ yaffs_ExtendedTags newTags;
|
|
+
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ yaffs_CheckGarbageCollection(dev);
|
|
+
|
|
+ /* Get the previous chunk at this location in the file if it exists */
|
|
+ prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
|
|
+
|
|
+ /* Set up new tags */
|
|
+ yaffs_InitialiseTags(&newTags);
|
|
+
|
|
+ newTags.chunkId = chunkInInode;
|
|
+ newTags.objectId = in->objectId;
|
|
+ newTags.serialNumber =
|
|
+ (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
|
|
+ newTags.byteCount = nBytes;
|
|
+
|
|
+ newChunkId =
|
|
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
|
|
+ useReserve);
|
|
+
|
|
+ if (newChunkId >= 0) {
|
|
+ yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
|
|
+
|
|
+ if (prevChunkId >= 0) {
|
|
+ yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
|
|
+
|
|
+ }
|
|
+
|
|
+ yaffs_CheckFileSanity(in);
|
|
+ }
|
|
+ return newChunkId;
|
|
+
|
|
+}
|
|
+
|
|
+/* UpdateObjectHeader updates the header on NAND for an object.
|
|
+ * If name is not NULL, then that new name is used.
|
|
+ */
|
|
+int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
|
|
+ int isShrink, int shadows)
|
|
+{
|
|
+
|
|
+ yaffs_BlockInfo *bi;
|
|
+
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ int prevChunkId;
|
|
+ int retVal = 0;
|
|
+ int result = 0;
|
|
+
|
|
+ int newChunkId;
|
|
+ yaffs_ExtendedTags newTags;
|
|
+ yaffs_ExtendedTags oldTags;
|
|
+
|
|
+ __u8 *buffer = NULL;
|
|
+ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
|
|
+
|
|
+ yaffs_ObjectHeader *oh = NULL;
|
|
+
|
|
+ yaffs_strcpy(oldName,"silly old name");
|
|
+
|
|
+ if (!in->fake || force) {
|
|
+
|
|
+ yaffs_CheckGarbageCollection(dev);
|
|
+ yaffs_CheckObjectDetailsLoaded(in);
|
|
+
|
|
+ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
|
|
+ oh = (yaffs_ObjectHeader *) buffer;
|
|
+
|
|
+ prevChunkId = in->chunkId;
|
|
+
|
|
+ if (prevChunkId >= 0) {
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
|
|
+ buffer, &oldTags);
|
|
+
|
|
+ yaffs_VerifyObjectHeader(in,oh,&oldTags,0);
|
|
+
|
|
+ memcpy(oldName, oh->name, sizeof(oh->name));
|
|
+ }
|
|
+
|
|
+ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
|
|
+
|
|
+ oh->type = in->variantType;
|
|
+ oh->yst_mode = in->yst_mode;
|
|
+ oh->shadowsObject = shadows;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ oh->win_atime[0] = in->win_atime[0];
|
|
+ oh->win_ctime[0] = in->win_ctime[0];
|
|
+ oh->win_mtime[0] = in->win_mtime[0];
|
|
+ oh->win_atime[1] = in->win_atime[1];
|
|
+ oh->win_ctime[1] = in->win_ctime[1];
|
|
+ oh->win_mtime[1] = in->win_mtime[1];
|
|
+#else
|
|
+ oh->yst_uid = in->yst_uid;
|
|
+ oh->yst_gid = in->yst_gid;
|
|
+ oh->yst_atime = in->yst_atime;
|
|
+ oh->yst_mtime = in->yst_mtime;
|
|
+ oh->yst_ctime = in->yst_ctime;
|
|
+ oh->yst_rdev = in->yst_rdev;
|
|
+#endif
|
|
+ if (in->parent) {
|
|
+ oh->parentObjectId = in->parent->objectId;
|
|
+ } else {
|
|
+ oh->parentObjectId = 0;
|
|
+ }
|
|
+
|
|
+ if (name && *name) {
|
|
+ memset(oh->name, 0, sizeof(oh->name));
|
|
+ yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
|
|
+ } else if (prevChunkId>=0) {
|
|
+ memcpy(oh->name, oldName, sizeof(oh->name));
|
|
+ } else {
|
|
+ memset(oh->name, 0, sizeof(oh->name));
|
|
+ }
|
|
+
|
|
+ oh->isShrink = isShrink;
|
|
+
|
|
+ switch (in->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ /* Should not happen */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ oh->fileSize =
|
|
+ (oh->parentObjectId == YAFFS_OBJECTID_DELETED
|
|
+ || oh->parentObjectId ==
|
|
+ YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
|
|
+ fileVariant.fileSize;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ oh->equivalentObjectId =
|
|
+ in->variant.hardLinkVariant.equivalentObjectId;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ /* Do nothing */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ /* Do nothing */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ yaffs_strncpy(oh->alias,
|
|
+ in->variant.symLinkVariant.alias,
|
|
+ YAFFS_MAX_ALIAS_LENGTH);
|
|
+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ /* Tags */
|
|
+ yaffs_InitialiseTags(&newTags);
|
|
+ in->serial++;
|
|
+ newTags.chunkId = 0;
|
|
+ newTags.objectId = in->objectId;
|
|
+ newTags.serialNumber = in->serial;
|
|
+
|
|
+ /* Add extra info for file header */
|
|
+
|
|
+ newTags.extraHeaderInfoAvailable = 1;
|
|
+ newTags.extraParentObjectId = oh->parentObjectId;
|
|
+ newTags.extraFileLength = oh->fileSize;
|
|
+ newTags.extraIsShrinkHeader = oh->isShrink;
|
|
+ newTags.extraEquivalentObjectId = oh->equivalentObjectId;
|
|
+ newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
|
|
+ newTags.extraObjectType = in->variantType;
|
|
+
|
|
+ yaffs_VerifyObjectHeader(in,oh,&newTags,1);
|
|
+
|
|
+ /* Create new chunk in NAND */
|
|
+ newChunkId =
|
|
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
|
|
+ (prevChunkId >= 0) ? 1 : 0);
|
|
+
|
|
+ if (newChunkId >= 0) {
|
|
+
|
|
+ in->chunkId = newChunkId;
|
|
+
|
|
+ if (prevChunkId >= 0) {
|
|
+ yaffs_DeleteChunk(dev, prevChunkId, 1,
|
|
+ __LINE__);
|
|
+ }
|
|
+
|
|
+ if(!yaffs_ObjectHasCachedWriteData(in))
|
|
+ in->dirty = 0;
|
|
+
|
|
+ /* If this was a shrink, then mark the block that the chunk lives on */
|
|
+ if (isShrink) {
|
|
+ bi = yaffs_GetBlockInfo(in->myDev,
|
|
+ newChunkId /in->myDev-> nChunksPerBlock);
|
|
+ bi->hasShrinkHeader = 1;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ retVal = newChunkId;
|
|
+
|
|
+ }
|
|
+
|
|
+ if (buffer)
|
|
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
|
|
+
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+/*------------------------ Short Operations Cache ----------------------------------------
|
|
+ * In many situations where there is no high level buffering (eg WinCE) a lot of
|
|
+ * reads might be short sequential reads, and a lot of writes may be short
|
|
+ * sequential writes. eg. scanning/writing a jpeg file.
|
|
+ * In these cases, a short read/write cache can provide a huge perfomance benefit
|
|
+ * with dumb-as-a-rock code.
|
|
+ * In Linux, the page cache provides read buffering aand the short op cache provides write
|
|
+ * buffering.
|
|
+ *
|
|
+ * There are a limited number (~10) of cache chunks per device so that we don't
|
|
+ * need a very intelligent search.
|
|
+ */
|
|
+
|
|
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
|
|
+{
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+ int i;
|
|
+ yaffs_ChunkCache *cache;
|
|
+ int nCaches = obj->myDev->nShortOpCaches;
|
|
+
|
|
+ for(i = 0; i < nCaches; i++){
|
|
+ cache = &dev->srCache[i];
|
|
+ if (cache->object == obj &&
|
|
+ cache->dirty)
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_FlushFilesChunkCache(yaffs_Object * obj)
|
|
+{
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+ int lowest = -99; /* Stop compiler whining. */
|
|
+ int i;
|
|
+ yaffs_ChunkCache *cache;
|
|
+ int chunkWritten = 0;
|
|
+ int nCaches = obj->myDev->nShortOpCaches;
|
|
+
|
|
+ if (nCaches > 0) {
|
|
+ do {
|
|
+ cache = NULL;
|
|
+
|
|
+ /* Find the dirty cache for this object with the lowest chunk id. */
|
|
+ for (i = 0; i < nCaches; i++) {
|
|
+ if (dev->srCache[i].object == obj &&
|
|
+ dev->srCache[i].dirty) {
|
|
+ if (!cache
|
|
+ || dev->srCache[i].chunkId <
|
|
+ lowest) {
|
|
+ cache = &dev->srCache[i];
|
|
+ lowest = cache->chunkId;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (cache && !cache->locked) {
|
|
+ /* Write it out and free it up */
|
|
+
|
|
+ chunkWritten =
|
|
+ yaffs_WriteChunkDataToObject(cache->object,
|
|
+ cache->chunkId,
|
|
+ cache->data,
|
|
+ cache->nBytes,
|
|
+ 1);
|
|
+ cache->dirty = 0;
|
|
+ cache->object = NULL;
|
|
+ }
|
|
+
|
|
+ } while (cache && chunkWritten > 0);
|
|
+
|
|
+ if (cache) {
|
|
+ /* Hoosterman, disk full while writing cache out. */
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
|
|
+
|
|
+ }
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+/*yaffs_FlushEntireDeviceCache(dev)
|
|
+ *
|
|
+ *
|
|
+ */
|
|
+
|
|
+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ int nCaches = dev->nShortOpCaches;
|
|
+ int i;
|
|
+
|
|
+ /* Find a dirty object in the cache and flush it...
|
|
+ * until there are no further dirty objects.
|
|
+ */
|
|
+ do {
|
|
+ obj = NULL;
|
|
+ for( i = 0; i < nCaches && !obj; i++) {
|
|
+ if (dev->srCache[i].object &&
|
|
+ dev->srCache[i].dirty)
|
|
+ obj = dev->srCache[i].object;
|
|
+
|
|
+ }
|
|
+ if(obj)
|
|
+ yaffs_FlushFilesChunkCache(obj);
|
|
+
|
|
+ } while(obj);
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+/* Grab us a cache chunk for use.
|
|
+ * First look for an empty one.
|
|
+ * Then look for the least recently used non-dirty one.
|
|
+ * Then look for the least recently used dirty one...., flush and look again.
|
|
+ */
|
|
+static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device * dev)
|
|
+{
|
|
+ int i;
|
|
+ int usage;
|
|
+ int theOne;
|
|
+
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+ for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if (!dev->srCache[i].object)
|
|
+ return &dev->srCache[i];
|
|
+ }
|
|
+
|
|
+ return NULL;
|
|
+
|
|
+ theOne = -1;
|
|
+ usage = 0; /* just to stop the compiler grizzling */
|
|
+
|
|
+ for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if (!dev->srCache[i].dirty &&
|
|
+ ((dev->srCache[i].lastUse < usage && theOne >= 0) ||
|
|
+ theOne < 0)) {
|
|
+ usage = dev->srCache[i].lastUse;
|
|
+ theOne = i;
|
|
+ }
|
|
+ }
|
|
+
|
|
+
|
|
+ return theOne >= 0 ? &dev->srCache[theOne] : NULL;
|
|
+ } else {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev)
|
|
+{
|
|
+ yaffs_ChunkCache *cache;
|
|
+ yaffs_Object *theObj;
|
|
+ int usage;
|
|
+ int i;
|
|
+ int pushout;
|
|
+
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+ /* Try find a non-dirty one... */
|
|
+
|
|
+ cache = yaffs_GrabChunkCacheWorker(dev);
|
|
+
|
|
+ if (!cache) {
|
|
+ /* They were all dirty, find the last recently used object and flush
|
|
+ * its cache, then find again.
|
|
+ * NB what's here is not very accurate, we actually flush the object
|
|
+ * the last recently used page.
|
|
+ */
|
|
+
|
|
+ /* With locking we can't assume we can use entry zero */
|
|
+
|
|
+ theObj = NULL;
|
|
+ usage = -1;
|
|
+ cache = NULL;
|
|
+ pushout = -1;
|
|
+
|
|
+ for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if (dev->srCache[i].object &&
|
|
+ !dev->srCache[i].locked &&
|
|
+ (dev->srCache[i].lastUse < usage || !cache))
|
|
+ {
|
|
+ usage = dev->srCache[i].lastUse;
|
|
+ theObj = dev->srCache[i].object;
|
|
+ cache = &dev->srCache[i];
|
|
+ pushout = i;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (!cache || cache->dirty) {
|
|
+ /* Flush and try again */
|
|
+ yaffs_FlushFilesChunkCache(theObj);
|
|
+ cache = yaffs_GrabChunkCacheWorker(dev);
|
|
+ }
|
|
+
|
|
+ }
|
|
+ return cache;
|
|
+ } else
|
|
+ return NULL;
|
|
+
|
|
+}
|
|
+
|
|
+/* Find a cached chunk */
|
|
+static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj,
|
|
+ int chunkId)
|
|
+{
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+ int i;
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+ for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if (dev->srCache[i].object == obj &&
|
|
+ dev->srCache[i].chunkId == chunkId) {
|
|
+ dev->cacheHits++;
|
|
+
|
|
+ return &dev->srCache[i];
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+/* Mark the chunk for the least recently used algorithym */
|
|
+static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache,
|
|
+ int isAWrite)
|
|
+{
|
|
+
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+ if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
|
|
+ /* Reset the cache usages */
|
|
+ int i;
|
|
+ for (i = 1; i < dev->nShortOpCaches; i++) {
|
|
+ dev->srCache[i].lastUse = 0;
|
|
+ }
|
|
+ dev->srLastUse = 0;
|
|
+ }
|
|
+
|
|
+ dev->srLastUse++;
|
|
+
|
|
+ cache->lastUse = dev->srLastUse;
|
|
+
|
|
+ if (isAWrite) {
|
|
+ cache->dirty = 1;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+/* Invalidate a single cache page.
|
|
+ * Do this when a whole page gets written,
|
|
+ * ie the short cache for this page is no longer valid.
|
|
+ */
|
|
+static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId)
|
|
+{
|
|
+ if (object->myDev->nShortOpCaches > 0) {
|
|
+ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
|
|
+
|
|
+ if (cache) {
|
|
+ cache->object = NULL;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+/* Invalidate all the cache pages associated with this object
|
|
+ * Do this whenever ther file is deleted or resized.
|
|
+ */
|
|
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in)
|
|
+{
|
|
+ int i;
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+ /* Invalidate it. */
|
|
+ for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if (dev->srCache[i].object == in) {
|
|
+ dev->srCache[i].object = NULL;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+/*--------------------- Checkpointing --------------------*/
|
|
+
|
|
+
|
|
+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head)
|
|
+{
|
|
+ yaffs_CheckpointValidity cp;
|
|
+
|
|
+ memset(&cp,0,sizeof(cp));
|
|
+
|
|
+ cp.structType = sizeof(cp);
|
|
+ cp.magic = YAFFS_MAGIC;
|
|
+ cp.version = YAFFS_CHECKPOINT_VERSION;
|
|
+ cp.head = (head) ? 1 : 0;
|
|
+
|
|
+ return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))?
|
|
+ 1 : 0;
|
|
+}
|
|
+
|
|
+static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
|
|
+{
|
|
+ yaffs_CheckpointValidity cp;
|
|
+ int ok;
|
|
+
|
|
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
+
|
|
+ if(ok)
|
|
+ ok = (cp.structType == sizeof(cp)) &&
|
|
+ (cp.magic == YAFFS_MAGIC) &&
|
|
+ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
|
|
+ (cp.head == ((head) ? 1 : 0));
|
|
+ return ok ? 1 : 0;
|
|
+}
|
|
+
|
|
+static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
|
|
+ yaffs_Device *dev)
|
|
+{
|
|
+ cp->nErasedBlocks = dev->nErasedBlocks;
|
|
+ cp->allocationBlock = dev->allocationBlock;
|
|
+ cp->allocationPage = dev->allocationPage;
|
|
+ cp->nFreeChunks = dev->nFreeChunks;
|
|
+
|
|
+ cp->nDeletedFiles = dev->nDeletedFiles;
|
|
+ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
|
|
+ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
|
|
+ cp->sequenceNumber = dev->sequenceNumber;
|
|
+ cp->oldestDirtySequence = dev->oldestDirtySequence;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
|
|
+ yaffs_CheckpointDevice *cp)
|
|
+{
|
|
+ dev->nErasedBlocks = cp->nErasedBlocks;
|
|
+ dev->allocationBlock = cp->allocationBlock;
|
|
+ dev->allocationPage = cp->allocationPage;
|
|
+ dev->nFreeChunks = cp->nFreeChunks;
|
|
+
|
|
+ dev->nDeletedFiles = cp->nDeletedFiles;
|
|
+ dev->nUnlinkedFiles = cp->nUnlinkedFiles;
|
|
+ dev->nBackgroundDeletions = cp->nBackgroundDeletions;
|
|
+ dev->sequenceNumber = cp->sequenceNumber;
|
|
+ dev->oldestDirtySequence = cp->oldestDirtySequence;
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
|
|
+{
|
|
+ yaffs_CheckpointDevice cp;
|
|
+ __u32 nBytes;
|
|
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
|
|
+
|
|
+ int ok;
|
|
+
|
|
+ /* Write device runtime values*/
|
|
+ yaffs_DeviceToCheckpointDevice(&cp,dev);
|
|
+ cp.structType = sizeof(cp);
|
|
+
|
|
+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
+
|
|
+ /* Write block info */
|
|
+ if(ok) {
|
|
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
|
|
+ ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes);
|
|
+ }
|
|
+
|
|
+ /* Write chunk bits */
|
|
+ if(ok) {
|
|
+ nBytes = nBlocks * dev->chunkBitmapStride;
|
|
+ ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes);
|
|
+ }
|
|
+ return ok ? 1 : 0;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
|
|
+{
|
|
+ yaffs_CheckpointDevice cp;
|
|
+ __u32 nBytes;
|
|
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
|
|
+
|
|
+ int ok;
|
|
+
|
|
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
+ if(!ok)
|
|
+ return 0;
|
|
+
|
|
+ if(cp.structType != sizeof(cp))
|
|
+ return 0;
|
|
+
|
|
+
|
|
+ yaffs_CheckpointDeviceToDevice(dev,&cp);
|
|
+
|
|
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
|
|
+
|
|
+ ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes);
|
|
+
|
|
+ if(!ok)
|
|
+ return 0;
|
|
+ nBytes = nBlocks * dev->chunkBitmapStride;
|
|
+
|
|
+ ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes);
|
|
+
|
|
+ return ok ? 1 : 0;
|
|
+}
|
|
+
|
|
+static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
|
|
+ yaffs_Object *obj)
|
|
+{
|
|
+
|
|
+ cp->objectId = obj->objectId;
|
|
+ cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
|
|
+ cp->chunkId = obj->chunkId;
|
|
+ cp->variantType = obj->variantType;
|
|
+ cp->deleted = obj->deleted;
|
|
+ cp->softDeleted = obj->softDeleted;
|
|
+ cp->unlinked = obj->unlinked;
|
|
+ cp->fake = obj->fake;
|
|
+ cp->renameAllowed = obj->renameAllowed;
|
|
+ cp->unlinkAllowed = obj->unlinkAllowed;
|
|
+ cp->serial = obj->serial;
|
|
+ cp->nDataChunks = obj->nDataChunks;
|
|
+
|
|
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
|
|
+ cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
|
|
+ else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
|
|
+ cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
|
|
+}
|
|
+
|
|
+static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp)
|
|
+{
|
|
+
|
|
+ yaffs_Object *parent;
|
|
+
|
|
+ obj->objectId = cp->objectId;
|
|
+
|
|
+ if(cp->parentId)
|
|
+ parent = yaffs_FindOrCreateObjectByNumber(
|
|
+ obj->myDev,
|
|
+ cp->parentId,
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
+ else
|
|
+ parent = NULL;
|
|
+
|
|
+ if(parent)
|
|
+ yaffs_AddObjectToDirectory(parent, obj);
|
|
+
|
|
+ obj->chunkId = cp->chunkId;
|
|
+ obj->variantType = cp->variantType;
|
|
+ obj->deleted = cp->deleted;
|
|
+ obj->softDeleted = cp->softDeleted;
|
|
+ obj->unlinked = cp->unlinked;
|
|
+ obj->fake = cp->fake;
|
|
+ obj->renameAllowed = cp->renameAllowed;
|
|
+ obj->unlinkAllowed = cp->unlinkAllowed;
|
|
+ obj->serial = cp->serial;
|
|
+ obj->nDataChunks = cp->nDataChunks;
|
|
+
|
|
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
|
|
+ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
|
|
+ else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
|
|
+ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
|
|
+
|
|
+ if(obj->objectId >= YAFFS_NOBJECT_BUCKETS)
|
|
+ obj->lazyLoaded = 1;
|
|
+}
|
|
+
|
|
+
|
|
+
|
|
+static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn,
|
|
+ __u32 level, int chunkOffset)
|
|
+{
|
|
+ int i;
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+ int ok = 1;
|
|
+ int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
|
|
+
|
|
+ if (tn) {
|
|
+ if (level > 0) {
|
|
+
|
|
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
|
|
+ if (tn->internal[i]) {
|
|
+ ok = yaffs_CheckpointTnodeWorker(in,
|
|
+ tn->internal[i],
|
|
+ level - 1,
|
|
+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
|
|
+ }
|
|
+ }
|
|
+ } else if (level == 0) {
|
|
+ __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
|
|
+ /* printf("write tnode at %d\n",baseOffset); */
|
|
+ ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset));
|
|
+ if(ok)
|
|
+ ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return ok;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
|
|
+{
|
|
+ __u32 endMarker = ~0;
|
|
+ int ok = 1;
|
|
+
|
|
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){
|
|
+ ok = yaffs_CheckpointTnodeWorker(obj,
|
|
+ obj->variant.fileVariant.top,
|
|
+ obj->variant.fileVariant.topLevel,
|
|
+ 0);
|
|
+ if(ok)
|
|
+ ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) ==
|
|
+ sizeof(endMarker));
|
|
+ }
|
|
+
|
|
+ return ok ? 1 : 0;
|
|
+}
|
|
+
|
|
+static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
|
|
+{
|
|
+ __u32 baseChunk;
|
|
+ int ok = 1;
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
|
|
+ yaffs_Tnode *tn;
|
|
+ int nread = 0;
|
|
+
|
|
+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
|
|
+
|
|
+ while(ok && (~baseChunk)){
|
|
+ nread++;
|
|
+ /* Read level 0 tnode */
|
|
+
|
|
+
|
|
+ /* printf("read tnode at %d\n",baseChunk); */
|
|
+ tn = yaffs_GetTnodeRaw(dev);
|
|
+ if(tn)
|
|
+ ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) ==
|
|
+ (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
|
|
+ else
|
|
+ ok = 0;
|
|
+
|
|
+ if(tn && ok){
|
|
+ ok = yaffs_AddOrFindLevel0Tnode(dev,
|
|
+ fileStructPtr,
|
|
+ baseChunk,
|
|
+ tn) ? 1 : 0;
|
|
+
|
|
+ }
|
|
+
|
|
+ if(ok)
|
|
+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
|
|
+
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(
|
|
+ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
|
|
+ nread,baseChunk,ok));
|
|
+
|
|
+ return ok ? 1 : 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_CheckpointObject cp;
|
|
+ int i;
|
|
+ int ok = 1;
|
|
+ struct list_head *lh;
|
|
+
|
|
+
|
|
+ /* Iterate through the objects in each hash entry,
|
|
+ * dumping them to the checkpointing stream.
|
|
+ */
|
|
+
|
|
+ for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){
|
|
+ list_for_each(lh, &dev->objectBucket[i].list) {
|
|
+ if (lh) {
|
|
+ obj = list_entry(lh, yaffs_Object, hashLink);
|
|
+ if (!obj->deferedFree) {
|
|
+ yaffs_ObjectToCheckpointObject(&cp,obj);
|
|
+ cp.structType = sizeof(cp);
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(
|
|
+ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
|
|
+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj));
|
|
+
|
|
+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
+
|
|
+ if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){
|
|
+ ok = yaffs_WriteCheckpointTnodes(obj);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Dump end of list */
|
|
+ memset(&cp,0xFF,sizeof(yaffs_CheckpointObject));
|
|
+ cp.structType = sizeof(cp);
|
|
+
|
|
+ if(ok)
|
|
+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
+
|
|
+ return ok ? 1 : 0;
|
|
+}
|
|
+
|
|
+static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+ yaffs_CheckpointObject cp;
|
|
+ int ok = 1;
|
|
+ int done = 0;
|
|
+ yaffs_Object *hardList = NULL;
|
|
+
|
|
+ while(ok && !done) {
|
|
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
+ if(cp.structType != sizeof(cp)) {
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR),
|
|
+ cp.structType,sizeof(cp),ok));
|
|
+ ok = 0;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
|
|
+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId));
|
|
+
|
|
+ if(ok && cp.objectId == ~0)
|
|
+ done = 1;
|
|
+ else if(ok){
|
|
+ obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType);
|
|
+ if(obj) {
|
|
+ yaffs_CheckpointObjectToObject(obj,&cp);
|
|
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
|
|
+ ok = yaffs_ReadCheckpointTnodes(obj);
|
|
+ } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
+ obj->hardLinks.next =
|
|
+ (struct list_head *)
|
|
+ hardList;
|
|
+ hardList = obj;
|
|
+ }
|
|
+
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if(ok)
|
|
+ yaffs_HardlinkFixup(dev,hardList);
|
|
+
|
|
+ return ok ? 1 : 0;
|
|
+}
|
|
+
|
|
+static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
|
|
+{
|
|
+ __u32 checkpointSum;
|
|
+ int ok;
|
|
+
|
|
+ yaffs_GetCheckpointSum(dev,&checkpointSum);
|
|
+
|
|
+ ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum));
|
|
+
|
|
+ if(!ok)
|
|
+ return 0;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
|
|
+{
|
|
+ __u32 checkpointSum0;
|
|
+ __u32 checkpointSum1;
|
|
+ int ok;
|
|
+
|
|
+ yaffs_GetCheckpointSum(dev,&checkpointSum0);
|
|
+
|
|
+ ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1));
|
|
+
|
|
+ if(!ok)
|
|
+ return 0;
|
|
+
|
|
+ if(checkpointSum0 != checkpointSum1)
|
|
+ return 0;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_WriteCheckpointData(yaffs_Device *dev)
|
|
+{
|
|
+
|
|
+ int ok = 1;
|
|
+
|
|
+ if(dev->skipCheckpointWrite || !dev->isYaffs2){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR)));
|
|
+ ok = 0;
|
|
+ }
|
|
+
|
|
+ if(ok)
|
|
+ ok = yaffs_CheckpointOpen(dev,1);
|
|
+
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR)));
|
|
+ ok = yaffs_WriteCheckpointValidityMarker(dev,1);
|
|
+ }
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR)));
|
|
+ ok = yaffs_WriteCheckpointDevice(dev);
|
|
+ }
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR)));
|
|
+ ok = yaffs_WriteCheckpointObjects(dev);
|
|
+ }
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR)));
|
|
+ ok = yaffs_WriteCheckpointValidityMarker(dev,0);
|
|
+ }
|
|
+
|
|
+ if(ok){
|
|
+ ok = yaffs_WriteCheckpointSum(dev);
|
|
+ }
|
|
+
|
|
+
|
|
+ if(!yaffs_CheckpointClose(dev))
|
|
+ ok = 0;
|
|
+
|
|
+ if(ok)
|
|
+ dev->isCheckpointed = 1;
|
|
+ else
|
|
+ dev->isCheckpointed = 0;
|
|
+
|
|
+ return dev->isCheckpointed;
|
|
+}
|
|
+
|
|
+static int yaffs_ReadCheckpointData(yaffs_Device *dev)
|
|
+{
|
|
+ int ok = 1;
|
|
+
|
|
+ if(dev->skipCheckpointRead || !dev->isYaffs2){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR)));
|
|
+ ok = 0;
|
|
+ }
|
|
+
|
|
+ if(ok)
|
|
+ ok = yaffs_CheckpointOpen(dev,0); /* open for read */
|
|
+
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR)));
|
|
+ ok = yaffs_ReadCheckpointValidityMarker(dev,1);
|
|
+ }
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR)));
|
|
+ ok = yaffs_ReadCheckpointDevice(dev);
|
|
+ }
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR)));
|
|
+ ok = yaffs_ReadCheckpointObjects(dev);
|
|
+ }
|
|
+ if(ok){
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR)));
|
|
+ ok = yaffs_ReadCheckpointValidityMarker(dev,0);
|
|
+ }
|
|
+
|
|
+ if(ok){
|
|
+ ok = yaffs_ReadCheckpointSum(dev);
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok));
|
|
+ }
|
|
+
|
|
+ if(!yaffs_CheckpointClose(dev))
|
|
+ ok = 0;
|
|
+
|
|
+ if(ok)
|
|
+ dev->isCheckpointed = 1;
|
|
+ else
|
|
+ dev->isCheckpointed = 0;
|
|
+
|
|
+ return ok ? 1 : 0;
|
|
+
|
|
+}
|
|
+
|
|
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
|
|
+{
|
|
+ if(dev->isCheckpointed ||
|
|
+ dev->blocksInCheckpoint > 0){
|
|
+ dev->isCheckpointed = 0;
|
|
+ yaffs_CheckpointInvalidateStream(dev);
|
|
+ if(dev->superBlock && dev->markSuperBlockDirty)
|
|
+ dev->markSuperBlockDirty(dev->superBlock);
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+int yaffs_CheckpointSave(yaffs_Device *dev)
|
|
+{
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
|
|
+
|
|
+ yaffs_VerifyObjects(dev);
|
|
+ yaffs_VerifyBlocks(dev);
|
|
+ yaffs_VerifyFreeChunks(dev);
|
|
+
|
|
+ if(!dev->isCheckpointed) {
|
|
+ yaffs_InvalidateCheckpoint(dev);
|
|
+ yaffs_WriteCheckpointData(dev);
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
|
|
+
|
|
+ return dev->isCheckpointed;
|
|
+}
|
|
+
|
|
+int yaffs_CheckpointRestore(yaffs_Device *dev)
|
|
+{
|
|
+ int retval;
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
|
|
+
|
|
+ retval = yaffs_ReadCheckpointData(dev);
|
|
+
|
|
+ if(dev->isCheckpointed){
|
|
+ yaffs_VerifyObjects(dev);
|
|
+ yaffs_VerifyBlocks(dev);
|
|
+ yaffs_VerifyFreeChunks(dev);
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
|
|
+
|
|
+ return retval;
|
|
+}
|
|
+
|
|
+/*--------------------- File read/write ------------------------
|
|
+ * Read and write have very similar structures.
|
|
+ * In general the read/write has three parts to it
|
|
+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
|
|
+ * Some complete chunks
|
|
+ * An incomplete chunk to end off with
|
|
+ *
|
|
+ * Curve-balls: the first chunk might also be the last chunk.
|
|
+ */
|
|
+
|
|
+int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
|
|
+ int nBytes)
|
|
+{
|
|
+
|
|
+ int chunk;
|
|
+ int start;
|
|
+ int nToCopy;
|
|
+ int n = nBytes;
|
|
+ int nDone = 0;
|
|
+ yaffs_ChunkCache *cache;
|
|
+
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ dev = in->myDev;
|
|
+
|
|
+ while (n > 0) {
|
|
+ //chunk = offset / dev->nDataBytesPerChunk + 1;
|
|
+ //start = offset % dev->nDataBytesPerChunk;
|
|
+ yaffs_AddrToChunk(dev,offset,&chunk,&start);
|
|
+ chunk++;
|
|
+
|
|
+ /* OK now check for the curveball where the start and end are in
|
|
+ * the same chunk.
|
|
+ */
|
|
+ if ((start + n) < dev->nDataBytesPerChunk) {
|
|
+ nToCopy = n;
|
|
+ } else {
|
|
+ nToCopy = dev->nDataBytesPerChunk - start;
|
|
+ }
|
|
+
|
|
+ cache = yaffs_FindChunkCache(in, chunk);
|
|
+
|
|
+ /* If the chunk is already in the cache or it is less than a whole chunk
|
|
+ * then use the cache (if there is caching)
|
|
+ * else bypass the cache.
|
|
+ */
|
|
+ if (cache || nToCopy != dev->nDataBytesPerChunk) {
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+
|
|
+ /* If we can't find the data in the cache, then load it up. */
|
|
+
|
|
+ if (!cache) {
|
|
+ cache = yaffs_GrabChunkCache(in->myDev);
|
|
+ cache->object = in;
|
|
+ cache->chunkId = chunk;
|
|
+ cache->dirty = 0;
|
|
+ cache->locked = 0;
|
|
+ yaffs_ReadChunkDataFromObject(in, chunk,
|
|
+ cache->
|
|
+ data);
|
|
+ cache->nBytes = 0;
|
|
+ }
|
|
+
|
|
+ yaffs_UseChunkCache(dev, cache, 0);
|
|
+
|
|
+ cache->locked = 1;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_UnlockYAFFS(TRUE);
|
|
+#endif
|
|
+ memcpy(buffer, &cache->data[start], nToCopy);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_LockYAFFS(TRUE);
|
|
+#endif
|
|
+ cache->locked = 0;
|
|
+ } else {
|
|
+ /* Read into the local buffer then copy..*/
|
|
+
|
|
+ __u8 *localBuffer =
|
|
+ yaffs_GetTempBuffer(dev, __LINE__);
|
|
+ yaffs_ReadChunkDataFromObject(in, chunk,
|
|
+ localBuffer);
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_UnlockYAFFS(TRUE);
|
|
+#endif
|
|
+ memcpy(buffer, &localBuffer[start], nToCopy);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_LockYAFFS(TRUE);
|
|
+#endif
|
|
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
|
|
+ __LINE__);
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ /* Under WinCE can't do direct transfer. Need to use a local buffer.
|
|
+ * This is because we otherwise screw up WinCE's memory mapper
|
|
+ */
|
|
+ yaffs_ReadChunkDataFromObject(in, chunk, localBuffer);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_UnlockYAFFS(TRUE);
|
|
+#endif
|
|
+ memcpy(buffer, localBuffer, dev->nDataBytesPerChunk);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_LockYAFFS(TRUE);
|
|
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
|
|
+#endif
|
|
+
|
|
+#else
|
|
+ /* A full chunk. Read directly into the supplied buffer. */
|
|
+ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
|
|
+#endif
|
|
+ }
|
|
+
|
|
+ n -= nToCopy;
|
|
+ offset += nToCopy;
|
|
+ buffer += nToCopy;
|
|
+ nDone += nToCopy;
|
|
+
|
|
+ }
|
|
+
|
|
+ return nDone;
|
|
+}
|
|
+
|
|
+int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
|
|
+ int nBytes, int writeThrough)
|
|
+{
|
|
+
|
|
+ int chunk;
|
|
+ int start;
|
|
+ int nToCopy;
|
|
+ int n = nBytes;
|
|
+ int nDone = 0;
|
|
+ int nToWriteBack;
|
|
+ int startOfWrite = offset;
|
|
+ int chunkWritten = 0;
|
|
+ int nBytesRead;
|
|
+
|
|
+ yaffs_Device *dev;
|
|
+
|
|
+ dev = in->myDev;
|
|
+
|
|
+ while (n > 0 && chunkWritten >= 0) {
|
|
+ //chunk = offset / dev->nDataBytesPerChunk + 1;
|
|
+ //start = offset % dev->nDataBytesPerChunk;
|
|
+ yaffs_AddrToChunk(dev,offset,&chunk,&start);
|
|
+ chunk++;
|
|
+
|
|
+ /* OK now check for the curveball where the start and end are in
|
|
+ * the same chunk.
|
|
+ */
|
|
+
|
|
+ if ((start + n) < dev->nDataBytesPerChunk) {
|
|
+ nToCopy = n;
|
|
+
|
|
+ /* Now folks, to calculate how many bytes to write back....
|
|
+ * If we're overwriting and not writing to then end of file then
|
|
+ * we need to write back as much as was there before.
|
|
+ */
|
|
+
|
|
+ nBytesRead =
|
|
+ in->variant.fileVariant.fileSize -
|
|
+ ((chunk - 1) * dev->nDataBytesPerChunk);
|
|
+
|
|
+ if (nBytesRead > dev->nDataBytesPerChunk) {
|
|
+ nBytesRead = dev->nDataBytesPerChunk;
|
|
+ }
|
|
+
|
|
+ nToWriteBack =
|
|
+ (nBytesRead >
|
|
+ (start + n)) ? nBytesRead : (start + n);
|
|
+
|
|
+ } else {
|
|
+ nToCopy = dev->nDataBytesPerChunk - start;
|
|
+ nToWriteBack = dev->nDataBytesPerChunk;
|
|
+ }
|
|
+
|
|
+ if (nToCopy != dev->nDataBytesPerChunk) {
|
|
+ /* An incomplete start or end chunk (or maybe both start and end chunk) */
|
|
+ if (dev->nShortOpCaches > 0) {
|
|
+ yaffs_ChunkCache *cache;
|
|
+ /* If we can't find the data in the cache, then load the cache */
|
|
+ cache = yaffs_FindChunkCache(in, chunk);
|
|
+
|
|
+ if (!cache
|
|
+ && yaffs_CheckSpaceForAllocation(in->
|
|
+ myDev)) {
|
|
+ cache = yaffs_GrabChunkCache(in->myDev);
|
|
+ cache->object = in;
|
|
+ cache->chunkId = chunk;
|
|
+ cache->dirty = 0;
|
|
+ cache->locked = 0;
|
|
+ yaffs_ReadChunkDataFromObject(in, chunk,
|
|
+ cache->
|
|
+ data);
|
|
+ }
|
|
+ else if(cache &&
|
|
+ !cache->dirty &&
|
|
+ !yaffs_CheckSpaceForAllocation(in->myDev)){
|
|
+ /* Drop the cache if it was a read cache item and
|
|
+ * no space check has been made for it.
|
|
+ */
|
|
+ cache = NULL;
|
|
+ }
|
|
+
|
|
+ if (cache) {
|
|
+ yaffs_UseChunkCache(dev, cache, 1);
|
|
+ cache->locked = 1;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_UnlockYAFFS(TRUE);
|
|
+#endif
|
|
+
|
|
+ memcpy(&cache->data[start], buffer,
|
|
+ nToCopy);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_LockYAFFS(TRUE);
|
|
+#endif
|
|
+ cache->locked = 0;
|
|
+ cache->nBytes = nToWriteBack;
|
|
+
|
|
+ if (writeThrough) {
|
|
+ chunkWritten =
|
|
+ yaffs_WriteChunkDataToObject
|
|
+ (cache->object,
|
|
+ cache->chunkId,
|
|
+ cache->data, cache->nBytes,
|
|
+ 1);
|
|
+ cache->dirty = 0;
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+ chunkWritten = -1; /* fail the write */
|
|
+ }
|
|
+ } else {
|
|
+ /* An incomplete start or end chunk (or maybe both start and end chunk)
|
|
+ * Read into the local buffer then copy, then copy over and write back.
|
|
+ */
|
|
+
|
|
+ __u8 *localBuffer =
|
|
+ yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ yaffs_ReadChunkDataFromObject(in, chunk,
|
|
+ localBuffer);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_UnlockYAFFS(TRUE);
|
|
+#endif
|
|
+
|
|
+ memcpy(&localBuffer[start], buffer, nToCopy);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_LockYAFFS(TRUE);
|
|
+#endif
|
|
+ chunkWritten =
|
|
+ yaffs_WriteChunkDataToObject(in, chunk,
|
|
+ localBuffer,
|
|
+ nToWriteBack,
|
|
+ 0);
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
|
|
+ __LINE__);
|
|
+
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ /* Under WinCE can't do direct transfer. Need to use a local buffer.
|
|
+ * This is because we otherwise screw up WinCE's memory mapper
|
|
+ */
|
|
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_UnlockYAFFS(TRUE);
|
|
+#endif
|
|
+ memcpy(localBuffer, buffer, dev->nDataBytesPerChunk);
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_LockYAFFS(TRUE);
|
|
+#endif
|
|
+ chunkWritten =
|
|
+ yaffs_WriteChunkDataToObject(in, chunk, localBuffer,
|
|
+ dev->nDataBytesPerChunk,
|
|
+ 0);
|
|
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
|
|
+#else
|
|
+ /* A full chunk. Write directly from the supplied buffer. */
|
|
+ chunkWritten =
|
|
+ yaffs_WriteChunkDataToObject(in, chunk, buffer,
|
|
+ dev->nDataBytesPerChunk,
|
|
+ 0);
|
|
+#endif
|
|
+ /* Since we've overwritten the cached data, we better invalidate it. */
|
|
+ yaffs_InvalidateChunkCache(in, chunk);
|
|
+ }
|
|
+
|
|
+ if (chunkWritten >= 0) {
|
|
+ n -= nToCopy;
|
|
+ offset += nToCopy;
|
|
+ buffer += nToCopy;
|
|
+ nDone += nToCopy;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ /* Update file object */
|
|
+
|
|
+ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) {
|
|
+ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
|
|
+ }
|
|
+
|
|
+ in->dirty = 1;
|
|
+
|
|
+ return nDone;
|
|
+}
|
|
+
|
|
+
|
|
+/* ---------------------- File resizing stuff ------------------ */
|
|
+
|
|
+static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize)
|
|
+{
|
|
+
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+ int oldFileSize = in->variant.fileVariant.fileSize;
|
|
+
|
|
+ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
|
|
+
|
|
+ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
|
|
+ dev->nDataBytesPerChunk;
|
|
+ int i;
|
|
+ int chunkId;
|
|
+
|
|
+ /* Delete backwards so that we don't end up with holes if
|
|
+ * power is lost part-way through the operation.
|
|
+ */
|
|
+ for (i = lastDel; i >= startDel; i--) {
|
|
+ /* NB this could be optimised somewhat,
|
|
+ * eg. could retrieve the tags and write them without
|
|
+ * using yaffs_DeleteChunk
|
|
+ */
|
|
+
|
|
+ chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
|
|
+ if (chunkId > 0) {
|
|
+ if (chunkId <
|
|
+ (dev->internalStartBlock * dev->nChunksPerBlock)
|
|
+ || chunkId >=
|
|
+ ((dev->internalEndBlock +
|
|
+ 1) * dev->nChunksPerBlock)) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("Found daft chunkId %d for %d" TENDSTR),
|
|
+ chunkId, i));
|
|
+ } else {
|
|
+ in->nDataChunks--;
|
|
+ yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize)
|
|
+{
|
|
+
|
|
+ int oldFileSize = in->variant.fileVariant.fileSize;
|
|
+ int newSizeOfPartialChunk;
|
|
+ int newFullChunks;
|
|
+
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+
|
|
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
|
|
+
|
|
+ yaffs_FlushFilesChunkCache(in);
|
|
+ yaffs_InvalidateWholeChunkCache(in);
|
|
+
|
|
+ yaffs_CheckGarbageCollection(dev);
|
|
+
|
|
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
|
|
+ return yaffs_GetFileSize(in);
|
|
+ }
|
|
+
|
|
+ if (newSize == oldFileSize) {
|
|
+ return oldFileSize;
|
|
+ }
|
|
+
|
|
+ if (newSize < oldFileSize) {
|
|
+
|
|
+ yaffs_PruneResizedChunks(in, newSize);
|
|
+
|
|
+ if (newSizeOfPartialChunk != 0) {
|
|
+ int lastChunk = 1 + newFullChunks;
|
|
+
|
|
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ /* Got to read and rewrite the last chunk with its new size and zero pad */
|
|
+ yaffs_ReadChunkDataFromObject(in, lastChunk,
|
|
+ localBuffer);
|
|
+
|
|
+ memset(localBuffer + newSizeOfPartialChunk, 0,
|
|
+ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
|
|
+
|
|
+ yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
|
|
+ newSizeOfPartialChunk, 1);
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
|
|
+ }
|
|
+
|
|
+ in->variant.fileVariant.fileSize = newSize;
|
|
+
|
|
+ yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
|
|
+ } else {
|
|
+ /* newsSize > oldFileSize */
|
|
+ in->variant.fileVariant.fileSize = newSize;
|
|
+ }
|
|
+
|
|
+
|
|
+
|
|
+ /* Write a new object header.
|
|
+ * show we've shrunk the file, if need be
|
|
+ * Do this only if the file is not in the deleted directories.
|
|
+ */
|
|
+ if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
|
|
+ in->parent->objectId != YAFFS_OBJECTID_DELETED) {
|
|
+ yaffs_UpdateObjectHeader(in, NULL, 0,
|
|
+ (newSize < oldFileSize) ? 1 : 0, 0);
|
|
+ }
|
|
+
|
|
+ return newSize;
|
|
+}
|
|
+
|
|
+loff_t yaffs_GetFileSize(yaffs_Object * obj)
|
|
+{
|
|
+ obj = yaffs_GetEquivalentObject(obj);
|
|
+
|
|
+ switch (obj->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ return obj->variant.fileVariant.fileSize;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ return yaffs_strlen(obj->variant.symLinkVariant.alias);
|
|
+ default:
|
|
+ return 0;
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+
|
|
+int yaffs_FlushFile(yaffs_Object * in, int updateTime)
|
|
+{
|
|
+ int retVal;
|
|
+ if (in->dirty) {
|
|
+ yaffs_FlushFilesChunkCache(in);
|
|
+ if (updateTime) {
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ yfsd_WinFileTimeNow(in->win_mtime);
|
|
+#else
|
|
+
|
|
+ in->yst_mtime = Y_CURRENT_TIME;
|
|
+
|
|
+#endif
|
|
+ }
|
|
+
|
|
+ retVal =
|
|
+ (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
|
|
+ 0) ? YAFFS_OK : YAFFS_FAIL;
|
|
+ } else {
|
|
+ retVal = YAFFS_OK;
|
|
+ }
|
|
+
|
|
+ return retVal;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_DoGenericObjectDeletion(yaffs_Object * in)
|
|
+{
|
|
+
|
|
+ /* First off, invalidate the file's data in the cache, without flushing. */
|
|
+ yaffs_InvalidateWholeChunkCache(in);
|
|
+
|
|
+ if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
|
|
+ /* Move to the unlinked directory so we have a record that it was deleted. */
|
|
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir,"deleted", 0, 0);
|
|
+
|
|
+ }
|
|
+
|
|
+ yaffs_RemoveObjectFromDirectory(in);
|
|
+ yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__);
|
|
+ in->chunkId = -1;
|
|
+
|
|
+ yaffs_FreeObject(in);
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+
|
|
+/* yaffs_DeleteFile deletes the whole file data
|
|
+ * and the inode associated with the file.
|
|
+ * It does not delete the links associated with the file.
|
|
+ */
|
|
+static int yaffs_UnlinkFile(yaffs_Object * in)
|
|
+{
|
|
+
|
|
+ int retVal;
|
|
+ int immediateDeletion = 0;
|
|
+
|
|
+ if (1) {
|
|
+#ifdef __KERNEL__
|
|
+ if (!in->myInode) {
|
|
+ immediateDeletion = 1;
|
|
+
|
|
+ }
|
|
+#else
|
|
+ if (in->inUse <= 0) {
|
|
+ immediateDeletion = 1;
|
|
+
|
|
+ }
|
|
+#endif
|
|
+ if (immediateDeletion) {
|
|
+ retVal =
|
|
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir,
|
|
+ "deleted", 0, 0);
|
|
+ T(YAFFS_TRACE_TRACING,
|
|
+ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
|
|
+ in->objectId));
|
|
+ in->deleted = 1;
|
|
+ in->myDev->nDeletedFiles++;
|
|
+ if (0 && in->myDev->isYaffs2) {
|
|
+ yaffs_ResizeFile(in, 0);
|
|
+ }
|
|
+ yaffs_SoftDeleteFile(in);
|
|
+ } else {
|
|
+ retVal =
|
|
+ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
|
|
+ "unlinked", 0, 0);
|
|
+ }
|
|
+
|
|
+ }
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+int yaffs_DeleteFile(yaffs_Object * in)
|
|
+{
|
|
+ int retVal = YAFFS_OK;
|
|
+
|
|
+ if (in->nDataChunks > 0) {
|
|
+ /* Use soft deletion if there is data in the file */
|
|
+ if (!in->unlinked) {
|
|
+ retVal = yaffs_UnlinkFile(in);
|
|
+ }
|
|
+ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
|
|
+ in->deleted = 1;
|
|
+ in->myDev->nDeletedFiles++;
|
|
+ yaffs_SoftDeleteFile(in);
|
|
+ }
|
|
+ return in->deleted ? YAFFS_OK : YAFFS_FAIL;
|
|
+ } else {
|
|
+ /* The file has no data chunks so we toss it immediately */
|
|
+ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
|
|
+ in->variant.fileVariant.top = NULL;
|
|
+ yaffs_DoGenericObjectDeletion(in);
|
|
+
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+}
|
|
+
|
|
+static int yaffs_DeleteDirectory(yaffs_Object * in)
|
|
+{
|
|
+ /* First check that the directory is empty. */
|
|
+ if (list_empty(&in->variant.directoryVariant.children)) {
|
|
+ return yaffs_DoGenericObjectDeletion(in);
|
|
+ }
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_DeleteSymLink(yaffs_Object * in)
|
|
+{
|
|
+ YFREE(in->variant.symLinkVariant.alias);
|
|
+
|
|
+ return yaffs_DoGenericObjectDeletion(in);
|
|
+}
|
|
+
|
|
+static int yaffs_DeleteHardLink(yaffs_Object * in)
|
|
+{
|
|
+ /* remove this hardlink from the list assocaited with the equivalent
|
|
+ * object
|
|
+ */
|
|
+ list_del(&in->hardLinks);
|
|
+ return yaffs_DoGenericObjectDeletion(in);
|
|
+}
|
|
+
|
|
+static void yaffs_DestroyObject(yaffs_Object * obj)
|
|
+{
|
|
+ switch (obj->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ yaffs_DeleteFile(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ yaffs_DeleteDirectory(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ yaffs_DeleteSymLink(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ yaffs_DeleteHardLink(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ yaffs_DoGenericObjectDeletion(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ break; /* should not happen. */
|
|
+ }
|
|
+}
|
|
+
|
|
+static int yaffs_UnlinkWorker(yaffs_Object * obj)
|
|
+{
|
|
+
|
|
+ if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
+ return yaffs_DeleteHardLink(obj);
|
|
+ } else if (!list_empty(&obj->hardLinks)) {
|
|
+ /* Curve ball: We're unlinking an object that has a hardlink.
|
|
+ *
|
|
+ * This problem arises because we are not strictly following
|
|
+ * The Linux link/inode model.
|
|
+ *
|
|
+ * We can't really delete the object.
|
|
+ * Instead, we do the following:
|
|
+ * - Select a hardlink.
|
|
+ * - Unhook it from the hard links
|
|
+ * - Unhook it from its parent directory (so that the rename can work)
|
|
+ * - Rename the object to the hardlink's name.
|
|
+ * - Delete the hardlink
|
|
+ */
|
|
+
|
|
+ yaffs_Object *hl;
|
|
+ int retVal;
|
|
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
|
|
+
|
|
+ hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
|
|
+
|
|
+ list_del_init(&hl->hardLinks);
|
|
+ list_del_init(&hl->siblings);
|
|
+
|
|
+ yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
|
|
+
|
|
+ retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
|
|
+
|
|
+ if (retVal == YAFFS_OK) {
|
|
+ retVal = yaffs_DoGenericObjectDeletion(hl);
|
|
+ }
|
|
+ return retVal;
|
|
+
|
|
+ } else {
|
|
+ switch (obj->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ return yaffs_UnlinkFile(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ return yaffs_DeleteDirectory(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ return yaffs_DeleteSymLink(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ return yaffs_DoGenericObjectDeletion(obj);
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ default:
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_UnlinkObject( yaffs_Object *obj)
|
|
+{
|
|
+
|
|
+ if (obj && obj->unlinkAllowed) {
|
|
+ return yaffs_UnlinkWorker(obj);
|
|
+ }
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+}
|
|
+int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+
|
|
+ obj = yaffs_FindObjectByName(dir, name);
|
|
+ return yaffs_UnlinkObject(obj);
|
|
+}
|
|
+
|
|
+/*----------------------- Initialisation Scanning ---------------------- */
|
|
+
|
|
+static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId,
|
|
+ int backwardScanning)
|
|
+{
|
|
+ yaffs_Object *obj;
|
|
+
|
|
+ if (!backwardScanning) {
|
|
+ /* Handle YAFFS1 forward scanning case
|
|
+ * For YAFFS1 we always do the deletion
|
|
+ */
|
|
+
|
|
+ } else {
|
|
+ /* Handle YAFFS2 case (backward scanning)
|
|
+ * If the shadowed object exists then ignore.
|
|
+ */
|
|
+ if (yaffs_FindObjectByNumber(dev, objId)) {
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
|
|
+ * We put it in unlinked dir to be cleaned up after the scanning
|
|
+ */
|
|
+ obj =
|
|
+ yaffs_FindOrCreateObjectByNumber(dev, objId,
|
|
+ YAFFS_OBJECT_TYPE_FILE);
|
|
+ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
|
|
+ obj->variant.fileVariant.shrinkSize = 0;
|
|
+ obj->valid = 1; /* So that we don't read any other info for this file */
|
|
+
|
|
+}
|
|
+
|
|
+typedef struct {
|
|
+ int seq;
|
|
+ int block;
|
|
+} yaffs_BlockIndex;
|
|
+
|
|
+
|
|
+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
|
|
+{
|
|
+ yaffs_Object *hl;
|
|
+ yaffs_Object *in;
|
|
+
|
|
+ while (hardList) {
|
|
+ hl = hardList;
|
|
+ hardList = (yaffs_Object *) (hardList->hardLinks.next);
|
|
+
|
|
+ in = yaffs_FindObjectByNumber(dev,
|
|
+ hl->variant.hardLinkVariant.
|
|
+ equivalentObjectId);
|
|
+
|
|
+ if (in) {
|
|
+ /* Add the hardlink pointers */
|
|
+ hl->variant.hardLinkVariant.equivalentObject = in;
|
|
+ list_add(&hl->hardLinks, &in->hardLinks);
|
|
+ } else {
|
|
+ /* Todo Need to report/handle this better.
|
|
+ * Got a problem... hardlink to a non-existant object
|
|
+ */
|
|
+ hl->variant.hardLinkVariant.equivalentObject = NULL;
|
|
+ INIT_LIST_HEAD(&hl->hardLinks);
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+
|
|
+
|
|
+
|
|
+
|
|
+static int ybicmp(const void *a, const void *b){
|
|
+ register int aseq = ((yaffs_BlockIndex *)a)->seq;
|
|
+ register int bseq = ((yaffs_BlockIndex *)b)->seq;
|
|
+ register int ablock = ((yaffs_BlockIndex *)a)->block;
|
|
+ register int bblock = ((yaffs_BlockIndex *)b)->block;
|
|
+ if( aseq == bseq )
|
|
+ return ablock - bblock;
|
|
+ else
|
|
+ return aseq - bseq;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_Scan(yaffs_Device * dev)
|
|
+{
|
|
+ yaffs_ExtendedTags tags;
|
|
+ int blk;
|
|
+ int blockIterator;
|
|
+ int startIterator;
|
|
+ int endIterator;
|
|
+ int nBlocksToScan = 0;
|
|
+ int result;
|
|
+
|
|
+ int chunk;
|
|
+ int c;
|
|
+ int deleted;
|
|
+ yaffs_BlockState state;
|
|
+ yaffs_Object *hardList = NULL;
|
|
+ yaffs_BlockInfo *bi;
|
|
+ int sequenceNumber;
|
|
+ yaffs_ObjectHeader *oh;
|
|
+ yaffs_Object *in;
|
|
+ yaffs_Object *parent;
|
|
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
|
|
+
|
|
+ int alloc_failed = 0;
|
|
+
|
|
+
|
|
+ __u8 *chunkData;
|
|
+
|
|
+ yaffs_BlockIndex *blockIndex = NULL;
|
|
+
|
|
+ if (dev->isYaffs2) {
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format.
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
|
|
+ dev->internalStartBlock, dev->internalEndBlock));
|
|
+
|
|
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
|
|
+
|
|
+ if (dev->isYaffs2) {
|
|
+ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
|
|
+ if(!blockIndex)
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Scan all the blocks to determine their state */
|
|
+ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
|
|
+ bi = yaffs_GetBlockInfo(dev, blk);
|
|
+ yaffs_ClearChunkBits(dev, blk);
|
|
+ bi->pagesInUse = 0;
|
|
+ bi->softDeletions = 0;
|
|
+
|
|
+ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
|
|
+
|
|
+ bi->blockState = state;
|
|
+ bi->sequenceNumber = sequenceNumber;
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN_DEBUG,
|
|
+ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
|
|
+ state, sequenceNumber));
|
|
+
|
|
+ if (state == YAFFS_BLOCK_STATE_DEAD) {
|
|
+ T(YAFFS_TRACE_BAD_BLOCKS,
|
|
+ (TSTR("block %d is bad" TENDSTR), blk));
|
|
+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
|
|
+ T(YAFFS_TRACE_SCAN_DEBUG,
|
|
+ (TSTR("Block empty " TENDSTR)));
|
|
+ dev->nErasedBlocks++;
|
|
+ dev->nFreeChunks += dev->nChunksPerBlock;
|
|
+ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
+
|
|
+ /* Determine the highest sequence number */
|
|
+ if (dev->isYaffs2 &&
|
|
+ sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
|
|
+ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
|
|
+
|
|
+ blockIndex[nBlocksToScan].seq = sequenceNumber;
|
|
+ blockIndex[nBlocksToScan].block = blk;
|
|
+
|
|
+ nBlocksToScan++;
|
|
+
|
|
+ if (sequenceNumber >= dev->sequenceNumber) {
|
|
+ dev->sequenceNumber = sequenceNumber;
|
|
+ }
|
|
+ } else if (dev->isYaffs2) {
|
|
+ /* TODO: Nasty sequence number! */
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR
|
|
+ ("Block scanning block %d has bad sequence number %d"
|
|
+ TENDSTR), blk, sequenceNumber));
|
|
+
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Sort the blocks
|
|
+ * Dungy old bubble sort for now...
|
|
+ */
|
|
+ if (dev->isYaffs2) {
|
|
+ yaffs_BlockIndex temp;
|
|
+ int i;
|
|
+ int j;
|
|
+
|
|
+ for (i = 0; i < nBlocksToScan; i++)
|
|
+ for (j = i + 1; j < nBlocksToScan; j++)
|
|
+ if (blockIndex[i].seq > blockIndex[j].seq) {
|
|
+ temp = blockIndex[j];
|
|
+ blockIndex[j] = blockIndex[i];
|
|
+ blockIndex[i] = temp;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Now scan the blocks looking at the data. */
|
|
+ if (dev->isYaffs2) {
|
|
+ startIterator = 0;
|
|
+ endIterator = nBlocksToScan - 1;
|
|
+ T(YAFFS_TRACE_SCAN_DEBUG,
|
|
+ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
|
|
+ } else {
|
|
+ startIterator = dev->internalStartBlock;
|
|
+ endIterator = dev->internalEndBlock;
|
|
+ }
|
|
+
|
|
+ /* For each block.... */
|
|
+ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
|
|
+ blockIterator++) {
|
|
+
|
|
+ if (dev->isYaffs2) {
|
|
+ /* get the block to scan in the correct order */
|
|
+ blk = blockIndex[blockIterator].block;
|
|
+ } else {
|
|
+ blk = blockIterator;
|
|
+ }
|
|
+
|
|
+ bi = yaffs_GetBlockInfo(dev, blk);
|
|
+ state = bi->blockState;
|
|
+
|
|
+ deleted = 0;
|
|
+
|
|
+ /* For each chunk in each block that needs scanning....*/
|
|
+ for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
|
|
+ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
|
|
+ /* Read the tags and decide what to do */
|
|
+ chunk = blk * dev->nChunksPerBlock + c;
|
|
+
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
|
|
+ &tags);
|
|
+
|
|
+ /* Let's have a good look at this chunk... */
|
|
+
|
|
+ if (!dev->isYaffs2 && tags.chunkDeleted) {
|
|
+ /* YAFFS1 only...
|
|
+ * A deleted chunk
|
|
+ */
|
|
+ deleted++;
|
|
+ dev->nFreeChunks++;
|
|
+ /*T((" %d %d deleted\n",blk,c)); */
|
|
+ } else if (!tags.chunkUsed) {
|
|
+ /* An unassigned chunk in the block
|
|
+ * This means that either the block is empty or
|
|
+ * this is the one being allocated from
|
|
+ */
|
|
+
|
|
+ if (c == 0) {
|
|
+ /* We're looking at the first chunk in the block so the block is unused */
|
|
+ state = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ dev->nErasedBlocks++;
|
|
+ } else {
|
|
+ /* this is the block being allocated from */
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR
|
|
+ (" Allocating from %d %d" TENDSTR),
|
|
+ blk, c));
|
|
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
|
|
+ dev->allocationBlock = blk;
|
|
+ dev->allocationPage = c;
|
|
+ dev->allocationBlockFinder = blk;
|
|
+ /* Set it to here to encourage the allocator to go forth from here. */
|
|
+
|
|
+ /* Yaffs2 sanity check:
|
|
+ * This should be the one with the highest sequence number
|
|
+ */
|
|
+ if (dev->isYaffs2
|
|
+ && (dev->sequenceNumber !=
|
|
+ bi->sequenceNumber)) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("yaffs: Allocation block %d was not highest sequence id:"
|
|
+ " block seq = %d, dev seq = %d"
|
|
+ TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber));
|
|
+ }
|
|
+ }
|
|
+
|
|
+ dev->nFreeChunks += (dev->nChunksPerBlock - c);
|
|
+ } else if (tags.chunkId > 0) {
|
|
+ /* chunkId > 0 so it is a data chunk... */
|
|
+ unsigned int endpos;
|
|
+
|
|
+ yaffs_SetChunkBit(dev, blk, c);
|
|
+ bi->pagesInUse++;
|
|
+
|
|
+ in = yaffs_FindOrCreateObjectByNumber(dev,
|
|
+ tags.
|
|
+ objectId,
|
|
+ YAFFS_OBJECT_TYPE_FILE);
|
|
+ /* PutChunkIntoFile checks for a clash (two data chunks with
|
|
+ * the same chunkId).
|
|
+ */
|
|
+
|
|
+ if(!in)
|
|
+ alloc_failed = 1;
|
|
+
|
|
+ if(in){
|
|
+ if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1))
|
|
+ alloc_failed = 1;
|
|
+ }
|
|
+
|
|
+ endpos =
|
|
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
|
|
+ tags.byteCount;
|
|
+ if (in &&
|
|
+ in->variantType == YAFFS_OBJECT_TYPE_FILE
|
|
+ && in->variant.fileVariant.scannedFileSize <
|
|
+ endpos) {
|
|
+ in->variant.fileVariant.
|
|
+ scannedFileSize = endpos;
|
|
+ if (!dev->useHeaderFileSize) {
|
|
+ in->variant.fileVariant.
|
|
+ fileSize =
|
|
+ in->variant.fileVariant.
|
|
+ scannedFileSize;
|
|
+ }
|
|
+
|
|
+ }
|
|
+ /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
|
|
+ } else {
|
|
+ /* chunkId == 0, so it is an ObjectHeader.
|
|
+ * Thus, we read in the object header and make the object
|
|
+ */
|
|
+ yaffs_SetChunkBit(dev, blk, c);
|
|
+ bi->pagesInUse++;
|
|
+
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
|
|
+ chunkData,
|
|
+ NULL);
|
|
+
|
|
+ oh = (yaffs_ObjectHeader *) chunkData;
|
|
+
|
|
+ in = yaffs_FindObjectByNumber(dev,
|
|
+ tags.objectId);
|
|
+ if (in && in->variantType != oh->type) {
|
|
+ /* This should not happen, but somehow
|
|
+ * Wev'e ended up with an objectId that has been reused but not yet
|
|
+ * deleted, and worse still it has changed type. Delete the old object.
|
|
+ */
|
|
+
|
|
+ yaffs_DestroyObject(in);
|
|
+
|
|
+ in = 0;
|
|
+ }
|
|
+
|
|
+ in = yaffs_FindOrCreateObjectByNumber(dev,
|
|
+ tags.
|
|
+ objectId,
|
|
+ oh->type);
|
|
+
|
|
+ if(!in)
|
|
+ alloc_failed = 1;
|
|
+
|
|
+ if (in && oh->shadowsObject > 0) {
|
|
+ yaffs_HandleShadowedObject(dev,
|
|
+ oh->
|
|
+ shadowsObject,
|
|
+ 0);
|
|
+ }
|
|
+
|
|
+ if (in && in->valid) {
|
|
+ /* We have already filled this one. We have a duplicate and need to resolve it. */
|
|
+
|
|
+ unsigned existingSerial = in->serial;
|
|
+ unsigned newSerial = tags.serialNumber;
|
|
+
|
|
+ if (dev->isYaffs2 ||
|
|
+ ((existingSerial + 1) & 3) ==
|
|
+ newSerial) {
|
|
+ /* Use new one - destroy the exisiting one */
|
|
+ yaffs_DeleteChunk(dev,
|
|
+ in->chunkId,
|
|
+ 1, __LINE__);
|
|
+ in->valid = 0;
|
|
+ } else {
|
|
+ /* Use existing - destroy this one. */
|
|
+ yaffs_DeleteChunk(dev, chunk, 1,
|
|
+ __LINE__);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (in && !in->valid &&
|
|
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
|
|
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
|
|
+ /* We only load some info, don't fiddle with directory structure */
|
|
+ in->valid = 1;
|
|
+ in->variantType = oh->type;
|
|
+
|
|
+ in->yst_mode = oh->yst_mode;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ in->win_atime[0] = oh->win_atime[0];
|
|
+ in->win_ctime[0] = oh->win_ctime[0];
|
|
+ in->win_mtime[0] = oh->win_mtime[0];
|
|
+ in->win_atime[1] = oh->win_atime[1];
|
|
+ in->win_ctime[1] = oh->win_ctime[1];
|
|
+ in->win_mtime[1] = oh->win_mtime[1];
|
|
+#else
|
|
+ in->yst_uid = oh->yst_uid;
|
|
+ in->yst_gid = oh->yst_gid;
|
|
+ in->yst_atime = oh->yst_atime;
|
|
+ in->yst_mtime = oh->yst_mtime;
|
|
+ in->yst_ctime = oh->yst_ctime;
|
|
+ in->yst_rdev = oh->yst_rdev;
|
|
+#endif
|
|
+ in->chunkId = chunk;
|
|
+
|
|
+ } else if (in && !in->valid) {
|
|
+ /* we need to load this info */
|
|
+
|
|
+ in->valid = 1;
|
|
+ in->variantType = oh->type;
|
|
+
|
|
+ in->yst_mode = oh->yst_mode;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ in->win_atime[0] = oh->win_atime[0];
|
|
+ in->win_ctime[0] = oh->win_ctime[0];
|
|
+ in->win_mtime[0] = oh->win_mtime[0];
|
|
+ in->win_atime[1] = oh->win_atime[1];
|
|
+ in->win_ctime[1] = oh->win_ctime[1];
|
|
+ in->win_mtime[1] = oh->win_mtime[1];
|
|
+#else
|
|
+ in->yst_uid = oh->yst_uid;
|
|
+ in->yst_gid = oh->yst_gid;
|
|
+ in->yst_atime = oh->yst_atime;
|
|
+ in->yst_mtime = oh->yst_mtime;
|
|
+ in->yst_ctime = oh->yst_ctime;
|
|
+ in->yst_rdev = oh->yst_rdev;
|
|
+#endif
|
|
+ in->chunkId = chunk;
|
|
+
|
|
+ yaffs_SetObjectName(in, oh->name);
|
|
+ in->dirty = 0;
|
|
+
|
|
+ /* directory stuff...
|
|
+ * hook up to parent
|
|
+ */
|
|
+
|
|
+ parent =
|
|
+ yaffs_FindOrCreateObjectByNumber
|
|
+ (dev, oh->parentObjectId,
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
+ if (parent->variantType ==
|
|
+ YAFFS_OBJECT_TYPE_UNKNOWN) {
|
|
+ /* Set up as a directory */
|
|
+ parent->variantType =
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY;
|
|
+ INIT_LIST_HEAD(&parent->variant.
|
|
+ directoryVariant.
|
|
+ children);
|
|
+ } else if (parent->variantType !=
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY)
|
|
+ {
|
|
+ /* Hoosterman, another problem....
|
|
+ * We're trying to use a non-directory as a directory
|
|
+ */
|
|
+
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("yaffs tragedy: attempting to use non-directory as"
|
|
+ " a directory in scan. Put in lost+found."
|
|
+ TENDSTR)));
|
|
+ parent = dev->lostNFoundDir;
|
|
+ }
|
|
+
|
|
+ yaffs_AddObjectToDirectory(parent, in);
|
|
+
|
|
+ if (0 && (parent == dev->deletedDir ||
|
|
+ parent == dev->unlinkedDir)) {
|
|
+ in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
|
|
+ dev->nDeletedFiles++;
|
|
+ }
|
|
+ /* Note re hardlinks.
|
|
+ * Since we might scan a hardlink before its equivalent object is scanned
|
|
+ * we put them all in a list.
|
|
+ * After scanning is complete, we should have all the objects, so we run through this
|
|
+ * list and fix up all the chains.
|
|
+ */
|
|
+
|
|
+ switch (in->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ /* Todo got a problem */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ if (dev->isYaffs2
|
|
+ && oh->isShrink) {
|
|
+ /* Prune back the shrunken chunks */
|
|
+ yaffs_PruneResizedChunks
|
|
+ (in, oh->fileSize);
|
|
+ /* Mark the block as having a shrinkHeader */
|
|
+ bi->hasShrinkHeader = 1;
|
|
+ }
|
|
+
|
|
+ if (dev->useHeaderFileSize)
|
|
+
|
|
+ in->variant.fileVariant.
|
|
+ fileSize =
|
|
+ oh->fileSize;
|
|
+
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ in->variant.hardLinkVariant.
|
|
+ equivalentObjectId =
|
|
+ oh->equivalentObjectId;
|
|
+ in->hardLinks.next =
|
|
+ (struct list_head *)
|
|
+ hardList;
|
|
+ hardList = in;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ /* Do nothing */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ /* Do nothing */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ in->variant.symLinkVariant.alias =
|
|
+ yaffs_CloneString(oh->alias);
|
|
+ if(!in->variant.symLinkVariant.alias)
|
|
+ alloc_failed = 1;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ if (parent == dev->deletedDir) {
|
|
+ yaffs_DestroyObject(in);
|
|
+ bi->hasShrinkHeader = 1;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
+ /* If we got this far while scanning, then the block is fully allocated.*/
|
|
+ state = YAFFS_BLOCK_STATE_FULL;
|
|
+ }
|
|
+
|
|
+ bi->blockState = state;
|
|
+
|
|
+ /* Now let's see if it was dirty */
|
|
+ if (bi->pagesInUse == 0 &&
|
|
+ !bi->hasShrinkHeader &&
|
|
+ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
|
|
+ yaffs_BlockBecameDirty(dev, blk);
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ if (blockIndex) {
|
|
+ YFREE(blockIndex);
|
|
+ }
|
|
+
|
|
+
|
|
+ /* Ok, we've done all the scanning.
|
|
+ * Fix up the hard link chains.
|
|
+ * We should now have scanned all the objects, now it's time to add these
|
|
+ * hardlinks.
|
|
+ */
|
|
+
|
|
+ yaffs_HardlinkFixup(dev,hardList);
|
|
+
|
|
+ /* Handle the unlinked files. Since they were left in an unlinked state we should
|
|
+ * just delete them.
|
|
+ */
|
|
+ {
|
|
+ struct list_head *i;
|
|
+ struct list_head *n;
|
|
+
|
|
+ yaffs_Object *l;
|
|
+ /* Soft delete all the unlinked files */
|
|
+ list_for_each_safe(i, n,
|
|
+ &dev->unlinkedDir->variant.directoryVariant.
|
|
+ children) {
|
|
+ if (i) {
|
|
+ l = list_entry(i, yaffs_Object, siblings);
|
|
+ yaffs_DestroyObject(l);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
|
|
+
|
|
+ if(alloc_failed){
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
|
|
+
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
|
|
+{
|
|
+ __u8 *chunkData;
|
|
+ yaffs_ObjectHeader *oh;
|
|
+ yaffs_Device *dev = in->myDev;
|
|
+ yaffs_ExtendedTags tags;
|
|
+ int result;
|
|
+ int alloc_failed = 0;
|
|
+
|
|
+ if(!in)
|
|
+ return;
|
|
+
|
|
+#if 0
|
|
+ T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR),
|
|
+ in->objectId,
|
|
+ in->lazyLoaded ? "not yet" : "already"));
|
|
+#endif
|
|
+
|
|
+ if(in->lazyLoaded){
|
|
+ in->lazyLoaded = 0;
|
|
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,in->chunkId,chunkData,&tags);
|
|
+ oh = (yaffs_ObjectHeader *) chunkData;
|
|
+
|
|
+ in->yst_mode = oh->yst_mode;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ in->win_atime[0] = oh->win_atime[0];
|
|
+ in->win_ctime[0] = oh->win_ctime[0];
|
|
+ in->win_mtime[0] = oh->win_mtime[0];
|
|
+ in->win_atime[1] = oh->win_atime[1];
|
|
+ in->win_ctime[1] = oh->win_ctime[1];
|
|
+ in->win_mtime[1] = oh->win_mtime[1];
|
|
+#else
|
|
+ in->yst_uid = oh->yst_uid;
|
|
+ in->yst_gid = oh->yst_gid;
|
|
+ in->yst_atime = oh->yst_atime;
|
|
+ in->yst_mtime = oh->yst_mtime;
|
|
+ in->yst_ctime = oh->yst_ctime;
|
|
+ in->yst_rdev = oh->yst_rdev;
|
|
+
|
|
+#endif
|
|
+ yaffs_SetObjectName(in, oh->name);
|
|
+
|
|
+ if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
|
|
+ in->variant.symLinkVariant.alias =
|
|
+ yaffs_CloneString(oh->alias);
|
|
+ if(!in->variant.symLinkVariant.alias)
|
|
+ alloc_failed = 1; /* Not returned to caller */
|
|
+ }
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__);
|
|
+ }
|
|
+}
|
|
+
|
|
+static int yaffs_ScanBackwards(yaffs_Device * dev)
|
|
+{
|
|
+ yaffs_ExtendedTags tags;
|
|
+ int blk;
|
|
+ int blockIterator;
|
|
+ int startIterator;
|
|
+ int endIterator;
|
|
+ int nBlocksToScan = 0;
|
|
+
|
|
+ int chunk;
|
|
+ int result;
|
|
+ int c;
|
|
+ int deleted;
|
|
+ yaffs_BlockState state;
|
|
+ yaffs_Object *hardList = NULL;
|
|
+ yaffs_BlockInfo *bi;
|
|
+ int sequenceNumber;
|
|
+ yaffs_ObjectHeader *oh;
|
|
+ yaffs_Object *in;
|
|
+ yaffs_Object *parent;
|
|
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
|
|
+ int itsUnlinked;
|
|
+ __u8 *chunkData;
|
|
+
|
|
+ int fileSize;
|
|
+ int isShrink;
|
|
+ int foundChunksInBlock;
|
|
+ int equivalentObjectId;
|
|
+ int alloc_failed = 0;
|
|
+
|
|
+
|
|
+ yaffs_BlockIndex *blockIndex = NULL;
|
|
+ int altBlockIndex = 0;
|
|
+
|
|
+ if (!dev->isYaffs2) {
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR
|
|
+ ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
|
|
+ TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
|
|
+
|
|
+
|
|
+ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
|
|
+
|
|
+ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
|
|
+
|
|
+ if(!blockIndex) {
|
|
+ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
|
|
+ altBlockIndex = 1;
|
|
+ }
|
|
+
|
|
+ if(!blockIndex) {
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ dev->blocksInCheckpoint = 0;
|
|
+
|
|
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
|
|
+
|
|
+ /* Scan all the blocks to determine their state */
|
|
+ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
|
|
+ bi = yaffs_GetBlockInfo(dev, blk);
|
|
+ yaffs_ClearChunkBits(dev, blk);
|
|
+ bi->pagesInUse = 0;
|
|
+ bi->softDeletions = 0;
|
|
+
|
|
+ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
|
|
+
|
|
+ bi->blockState = state;
|
|
+ bi->sequenceNumber = sequenceNumber;
|
|
+
|
|
+ if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
|
|
+ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN_DEBUG,
|
|
+ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
|
|
+ state, sequenceNumber));
|
|
+
|
|
+
|
|
+ if(state == YAFFS_BLOCK_STATE_CHECKPOINT){
|
|
+ dev->blocksInCheckpoint++;
|
|
+
|
|
+ } else if (state == YAFFS_BLOCK_STATE_DEAD) {
|
|
+ T(YAFFS_TRACE_BAD_BLOCKS,
|
|
+ (TSTR("block %d is bad" TENDSTR), blk));
|
|
+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
|
|
+ T(YAFFS_TRACE_SCAN_DEBUG,
|
|
+ (TSTR("Block empty " TENDSTR)));
|
|
+ dev->nErasedBlocks++;
|
|
+ dev->nFreeChunks += dev->nChunksPerBlock;
|
|
+ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
+
|
|
+ /* Determine the highest sequence number */
|
|
+ if (dev->isYaffs2 &&
|
|
+ sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
|
|
+ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
|
|
+
|
|
+ blockIndex[nBlocksToScan].seq = sequenceNumber;
|
|
+ blockIndex[nBlocksToScan].block = blk;
|
|
+
|
|
+ nBlocksToScan++;
|
|
+
|
|
+ if (sequenceNumber >= dev->sequenceNumber) {
|
|
+ dev->sequenceNumber = sequenceNumber;
|
|
+ }
|
|
+ } else if (dev->isYaffs2) {
|
|
+ /* TODO: Nasty sequence number! */
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR
|
|
+ ("Block scanning block %d has bad sequence number %d"
|
|
+ TENDSTR), blk, sequenceNumber));
|
|
+
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
|
|
+
|
|
+
|
|
+
|
|
+ YYIELD();
|
|
+
|
|
+ /* Sort the blocks */
|
|
+#ifndef CONFIG_YAFFS_USE_OWN_SORT
|
|
+ yaffs_qsort(blockIndex, nBlocksToScan,
|
|
+ sizeof(yaffs_BlockIndex), ybicmp);
|
|
+#else
|
|
+ {
|
|
+ /* Dungy old bubble sort... */
|
|
+
|
|
+ yaffs_BlockIndex temp;
|
|
+ int i;
|
|
+ int j;
|
|
+
|
|
+ for (i = 0; i < nBlocksToScan; i++)
|
|
+ for (j = i + 1; j < nBlocksToScan; j++)
|
|
+ if (blockIndex[i].seq > blockIndex[j].seq) {
|
|
+ temp = blockIndex[j];
|
|
+ blockIndex[j] = blockIndex[i];
|
|
+ blockIndex[i] = temp;
|
|
+ }
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ YYIELD();
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
|
|
+
|
|
+ /* Now scan the blocks looking at the data. */
|
|
+ startIterator = 0;
|
|
+ endIterator = nBlocksToScan - 1;
|
|
+ T(YAFFS_TRACE_SCAN_DEBUG,
|
|
+ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
|
|
+
|
|
+ /* For each block.... backwards */
|
|
+ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
|
|
+ blockIterator--) {
|
|
+ /* Cooperative multitasking! This loop can run for so
|
|
+ long that watchdog timers expire. */
|
|
+ YYIELD();
|
|
+
|
|
+ /* get the block to scan in the correct order */
|
|
+ blk = blockIndex[blockIterator].block;
|
|
+
|
|
+ bi = yaffs_GetBlockInfo(dev, blk);
|
|
+
|
|
+
|
|
+ state = bi->blockState;
|
|
+
|
|
+ deleted = 0;
|
|
+
|
|
+ /* For each chunk in each block that needs scanning.... */
|
|
+ foundChunksInBlock = 0;
|
|
+ for (c = dev->nChunksPerBlock - 1;
|
|
+ !alloc_failed && c >= 0 &&
|
|
+ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
|
|
+ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
|
|
+ /* Scan backwards...
|
|
+ * Read the tags and decide what to do
|
|
+ */
|
|
+
|
|
+ chunk = blk * dev->nChunksPerBlock + c;
|
|
+
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
|
|
+ &tags);
|
|
+
|
|
+ /* Let's have a good look at this chunk... */
|
|
+
|
|
+ if (!tags.chunkUsed) {
|
|
+ /* An unassigned chunk in the block.
|
|
+ * If there are used chunks after this one, then
|
|
+ * it is a chunk that was skipped due to failing the erased
|
|
+ * check. Just skip it so that it can be deleted.
|
|
+ * But, more typically, We get here when this is an unallocated
|
|
+ * chunk and his means that either the block is empty or
|
|
+ * this is the one being allocated from
|
|
+ */
|
|
+
|
|
+ if(foundChunksInBlock)
|
|
+ {
|
|
+ /* This is a chunk that was skipped due to failing the erased check */
|
|
+
|
|
+ } else if (c == 0) {
|
|
+ /* We're looking at the first chunk in the block so the block is unused */
|
|
+ state = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ dev->nErasedBlocks++;
|
|
+ } else {
|
|
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
|
|
+ state == YAFFS_BLOCK_STATE_ALLOCATING) {
|
|
+ if(dev->sequenceNumber == bi->sequenceNumber) {
|
|
+ /* this is the block being allocated from */
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN,
|
|
+ (TSTR
|
|
+ (" Allocating from %d %d"
|
|
+ TENDSTR), blk, c));
|
|
+
|
|
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
|
|
+ dev->allocationBlock = blk;
|
|
+ dev->allocationPage = c;
|
|
+ dev->allocationBlockFinder = blk;
|
|
+ }
|
|
+ else {
|
|
+ /* This is a partially written block that is not
|
|
+ * the current allocation block. This block must have
|
|
+ * had a write failure, so set up for retirement.
|
|
+ */
|
|
+
|
|
+ bi->needsRetiring = 1;
|
|
+ bi->gcPrioritise = 1;
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("Partially written block %d being set for retirement" TENDSTR),
|
|
+ blk));
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ dev->nFreeChunks++;
|
|
+
|
|
+ } else if (tags.chunkId > 0) {
|
|
+ /* chunkId > 0 so it is a data chunk... */
|
|
+ unsigned int endpos;
|
|
+ __u32 chunkBase =
|
|
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk;
|
|
+
|
|
+ foundChunksInBlock = 1;
|
|
+
|
|
+
|
|
+ yaffs_SetChunkBit(dev, blk, c);
|
|
+ bi->pagesInUse++;
|
|
+
|
|
+ in = yaffs_FindOrCreateObjectByNumber(dev,
|
|
+ tags.
|
|
+ objectId,
|
|
+ YAFFS_OBJECT_TYPE_FILE);
|
|
+ if(!in){
|
|
+ /* Out of memory */
|
|
+ alloc_failed = 1;
|
|
+ }
|
|
+
|
|
+ if (in &&
|
|
+ in->variantType == YAFFS_OBJECT_TYPE_FILE
|
|
+ && chunkBase <
|
|
+ in->variant.fileVariant.shrinkSize) {
|
|
+ /* This has not been invalidated by a resize */
|
|
+ if(!yaffs_PutChunkIntoFile(in, tags.chunkId,
|
|
+ chunk, -1)){
|
|
+ alloc_failed = 1;
|
|
+ }
|
|
+
|
|
+ /* File size is calculated by looking at the data chunks if we have not
|
|
+ * seen an object header yet. Stop this practice once we find an object header.
|
|
+ */
|
|
+ endpos =
|
|
+ (tags.chunkId -
|
|
+ 1) * dev->nDataBytesPerChunk +
|
|
+ tags.byteCount;
|
|
+
|
|
+ if (!in->valid && /* have not got an object header yet */
|
|
+ in->variant.fileVariant.
|
|
+ scannedFileSize < endpos) {
|
|
+ in->variant.fileVariant.
|
|
+ scannedFileSize = endpos;
|
|
+ in->variant.fileVariant.
|
|
+ fileSize =
|
|
+ in->variant.fileVariant.
|
|
+ scannedFileSize;
|
|
+ }
|
|
+
|
|
+ } else if(in) {
|
|
+ /* This chunk has been invalidated by a resize, so delete */
|
|
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
|
|
+
|
|
+ }
|
|
+ } else {
|
|
+ /* chunkId == 0, so it is an ObjectHeader.
|
|
+ * Thus, we read in the object header and make the object
|
|
+ */
|
|
+ foundChunksInBlock = 1;
|
|
+
|
|
+ yaffs_SetChunkBit(dev, blk, c);
|
|
+ bi->pagesInUse++;
|
|
+
|
|
+ oh = NULL;
|
|
+ in = NULL;
|
|
+
|
|
+ if (tags.extraHeaderInfoAvailable) {
|
|
+ in = yaffs_FindOrCreateObjectByNumber
|
|
+ (dev, tags.objectId,
|
|
+ tags.extraObjectType);
|
|
+ }
|
|
+
|
|
+ if (!in ||
|
|
+#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
|
|
+ !in->valid ||
|
|
+#endif
|
|
+ tags.extraShadows ||
|
|
+ (!in->valid &&
|
|
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
|
|
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
|
|
+ ) {
|
|
+
|
|
+ /* If we don't have valid info then we need to read the chunk
|
|
+ * TODO In future we can probably defer reading the chunk and
|
|
+ * living with invalid data until needed.
|
|
+ */
|
|
+
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,
|
|
+ chunk,
|
|
+ chunkData,
|
|
+ NULL);
|
|
+
|
|
+ oh = (yaffs_ObjectHeader *) chunkData;
|
|
+
|
|
+ if (!in)
|
|
+ in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
|
|
+
|
|
+ }
|
|
+
|
|
+ if (!in) {
|
|
+ /* TODO Hoosterman we have a problem! */
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("yaffs tragedy: Could not make object for object %d "
|
|
+ "at chunk %d during scan"
|
|
+ TENDSTR), tags.objectId, chunk));
|
|
+
|
|
+ }
|
|
+
|
|
+ if (in->valid) {
|
|
+ /* We have already filled this one.
|
|
+ * We have a duplicate that will be discarded, but
|
|
+ * we first have to suck out resize info if it is a file.
|
|
+ */
|
|
+
|
|
+ if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
|
|
+ ((oh &&
|
|
+ oh-> type == YAFFS_OBJECT_TYPE_FILE)||
|
|
+ (tags.extraHeaderInfoAvailable &&
|
|
+ tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))
|
|
+ ) {
|
|
+ __u32 thisSize =
|
|
+ (oh) ? oh->fileSize : tags.
|
|
+ extraFileLength;
|
|
+ __u32 parentObjectId =
|
|
+ (oh) ? oh->
|
|
+ parentObjectId : tags.
|
|
+ extraParentObjectId;
|
|
+ unsigned isShrink =
|
|
+ (oh) ? oh->isShrink : tags.
|
|
+ extraIsShrinkHeader;
|
|
+
|
|
+ /* If it is deleted (unlinked at start also means deleted)
|
|
+ * we treat the file size as being zeroed at this point.
|
|
+ */
|
|
+ if (parentObjectId ==
|
|
+ YAFFS_OBJECTID_DELETED
|
|
+ || parentObjectId ==
|
|
+ YAFFS_OBJECTID_UNLINKED) {
|
|
+ thisSize = 0;
|
|
+ isShrink = 1;
|
|
+ }
|
|
+
|
|
+ if (isShrink &&
|
|
+ in->variant.fileVariant.
|
|
+ shrinkSize > thisSize) {
|
|
+ in->variant.fileVariant.
|
|
+ shrinkSize =
|
|
+ thisSize;
|
|
+ }
|
|
+
|
|
+ if (isShrink) {
|
|
+ bi->hasShrinkHeader = 1;
|
|
+ }
|
|
+
|
|
+ }
|
|
+ /* Use existing - destroy this one. */
|
|
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
|
|
+
|
|
+ }
|
|
+
|
|
+ if (!in->valid &&
|
|
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
|
|
+ tags.objectId ==
|
|
+ YAFFS_OBJECTID_LOSTNFOUND)) {
|
|
+ /* We only load some info, don't fiddle with directory structure */
|
|
+ in->valid = 1;
|
|
+
|
|
+ if(oh) {
|
|
+ in->variantType = oh->type;
|
|
+
|
|
+ in->yst_mode = oh->yst_mode;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ in->win_atime[0] = oh->win_atime[0];
|
|
+ in->win_ctime[0] = oh->win_ctime[0];
|
|
+ in->win_mtime[0] = oh->win_mtime[0];
|
|
+ in->win_atime[1] = oh->win_atime[1];
|
|
+ in->win_ctime[1] = oh->win_ctime[1];
|
|
+ in->win_mtime[1] = oh->win_mtime[1];
|
|
+#else
|
|
+ in->yst_uid = oh->yst_uid;
|
|
+ in->yst_gid = oh->yst_gid;
|
|
+ in->yst_atime = oh->yst_atime;
|
|
+ in->yst_mtime = oh->yst_mtime;
|
|
+ in->yst_ctime = oh->yst_ctime;
|
|
+ in->yst_rdev = oh->yst_rdev;
|
|
+
|
|
+#endif
|
|
+ } else {
|
|
+ in->variantType = tags.extraObjectType;
|
|
+ in->lazyLoaded = 1;
|
|
+ }
|
|
+
|
|
+ in->chunkId = chunk;
|
|
+
|
|
+ } else if (!in->valid) {
|
|
+ /* we need to load this info */
|
|
+
|
|
+ in->valid = 1;
|
|
+ in->chunkId = chunk;
|
|
+
|
|
+ if(oh) {
|
|
+ in->variantType = oh->type;
|
|
+
|
|
+ in->yst_mode = oh->yst_mode;
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ in->win_atime[0] = oh->win_atime[0];
|
|
+ in->win_ctime[0] = oh->win_ctime[0];
|
|
+ in->win_mtime[0] = oh->win_mtime[0];
|
|
+ in->win_atime[1] = oh->win_atime[1];
|
|
+ in->win_ctime[1] = oh->win_ctime[1];
|
|
+ in->win_mtime[1] = oh->win_mtime[1];
|
|
+#else
|
|
+ in->yst_uid = oh->yst_uid;
|
|
+ in->yst_gid = oh->yst_gid;
|
|
+ in->yst_atime = oh->yst_atime;
|
|
+ in->yst_mtime = oh->yst_mtime;
|
|
+ in->yst_ctime = oh->yst_ctime;
|
|
+ in->yst_rdev = oh->yst_rdev;
|
|
+#endif
|
|
+
|
|
+ if (oh->shadowsObject > 0)
|
|
+ yaffs_HandleShadowedObject(dev,
|
|
+ oh->
|
|
+ shadowsObject,
|
|
+ 1);
|
|
+
|
|
+
|
|
+ yaffs_SetObjectName(in, oh->name);
|
|
+ parent =
|
|
+ yaffs_FindOrCreateObjectByNumber
|
|
+ (dev, oh->parentObjectId,
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
+
|
|
+ fileSize = oh->fileSize;
|
|
+ isShrink = oh->isShrink;
|
|
+ equivalentObjectId = oh->equivalentObjectId;
|
|
+
|
|
+ }
|
|
+ else {
|
|
+ in->variantType = tags.extraObjectType;
|
|
+ parent =
|
|
+ yaffs_FindOrCreateObjectByNumber
|
|
+ (dev, tags.extraParentObjectId,
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
+ fileSize = tags.extraFileLength;
|
|
+ isShrink = tags.extraIsShrinkHeader;
|
|
+ equivalentObjectId = tags.extraEquivalentObjectId;
|
|
+ in->lazyLoaded = 1;
|
|
+
|
|
+ }
|
|
+ in->dirty = 0;
|
|
+
|
|
+ /* directory stuff...
|
|
+ * hook up to parent
|
|
+ */
|
|
+
|
|
+ if (parent->variantType ==
|
|
+ YAFFS_OBJECT_TYPE_UNKNOWN) {
|
|
+ /* Set up as a directory */
|
|
+ parent->variantType =
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY;
|
|
+ INIT_LIST_HEAD(&parent->variant.
|
|
+ directoryVariant.
|
|
+ children);
|
|
+ } else if (parent->variantType !=
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY)
|
|
+ {
|
|
+ /* Hoosterman, another problem....
|
|
+ * We're trying to use a non-directory as a directory
|
|
+ */
|
|
+
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("yaffs tragedy: attempting to use non-directory as"
|
|
+ " a directory in scan. Put in lost+found."
|
|
+ TENDSTR)));
|
|
+ parent = dev->lostNFoundDir;
|
|
+ }
|
|
+
|
|
+ yaffs_AddObjectToDirectory(parent, in);
|
|
+
|
|
+ itsUnlinked = (parent == dev->deletedDir) ||
|
|
+ (parent == dev->unlinkedDir);
|
|
+
|
|
+ if (isShrink) {
|
|
+ /* Mark the block as having a shrinkHeader */
|
|
+ bi->hasShrinkHeader = 1;
|
|
+ }
|
|
+
|
|
+ /* Note re hardlinks.
|
|
+ * Since we might scan a hardlink before its equivalent object is scanned
|
|
+ * we put them all in a list.
|
|
+ * After scanning is complete, we should have all the objects, so we run
|
|
+ * through this list and fix up all the chains.
|
|
+ */
|
|
+
|
|
+ switch (in->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
+ /* Todo got a problem */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+
|
|
+ if (in->variant.fileVariant.
|
|
+ scannedFileSize < fileSize) {
|
|
+ /* This covers the case where the file size is greater
|
|
+ * than where the data is
|
|
+ * This will happen if the file is resized to be larger
|
|
+ * than its current data extents.
|
|
+ */
|
|
+ in->variant.fileVariant.fileSize = fileSize;
|
|
+ in->variant.fileVariant.scannedFileSize =
|
|
+ in->variant.fileVariant.fileSize;
|
|
+ }
|
|
+
|
|
+ if (isShrink &&
|
|
+ in->variant.fileVariant.shrinkSize > fileSize) {
|
|
+ in->variant.fileVariant.shrinkSize = fileSize;
|
|
+ }
|
|
+
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ if(!itsUnlinked) {
|
|
+ in->variant.hardLinkVariant.equivalentObjectId =
|
|
+ equivalentObjectId;
|
|
+ in->hardLinks.next =
|
|
+ (struct list_head *) hardList;
|
|
+ hardList = in;
|
|
+ }
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ /* Do nothing */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ /* Do nothing */
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ if(oh){
|
|
+ in->variant.symLinkVariant.alias =
|
|
+ yaffs_CloneString(oh->
|
|
+ alias);
|
|
+ if(!in->variant.symLinkVariant.alias)
|
|
+ alloc_failed = 1;
|
|
+ }
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ } /* End of scanning for each chunk */
|
|
+
|
|
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
+ /* If we got this far while scanning, then the block is fully allocated. */
|
|
+ state = YAFFS_BLOCK_STATE_FULL;
|
|
+ }
|
|
+
|
|
+ bi->blockState = state;
|
|
+
|
|
+ /* Now let's see if it was dirty */
|
|
+ if (bi->pagesInUse == 0 &&
|
|
+ !bi->hasShrinkHeader &&
|
|
+ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
|
|
+ yaffs_BlockBecameDirty(dev, blk);
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ if (altBlockIndex)
|
|
+ YFREE_ALT(blockIndex);
|
|
+ else
|
|
+ YFREE(blockIndex);
|
|
+
|
|
+ /* Ok, we've done all the scanning.
|
|
+ * Fix up the hard link chains.
|
|
+ * We should now have scanned all the objects, now it's time to add these
|
|
+ * hardlinks.
|
|
+ */
|
|
+ yaffs_HardlinkFixup(dev,hardList);
|
|
+
|
|
+
|
|
+ /*
|
|
+ * Sort out state of unlinked and deleted objects.
|
|
+ */
|
|
+ {
|
|
+ struct list_head *i;
|
|
+ struct list_head *n;
|
|
+
|
|
+ yaffs_Object *l;
|
|
+
|
|
+ /* Soft delete all the unlinked files */
|
|
+ list_for_each_safe(i, n,
|
|
+ &dev->unlinkedDir->variant.directoryVariant.
|
|
+ children) {
|
|
+ if (i) {
|
|
+ l = list_entry(i, yaffs_Object, siblings);
|
|
+ yaffs_DestroyObject(l);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Soft delete all the deletedDir files */
|
|
+ list_for_each_safe(i, n,
|
|
+ &dev->deletedDir->variant.directoryVariant.
|
|
+ children) {
|
|
+ if (i) {
|
|
+ l = list_entry(i, yaffs_Object, siblings);
|
|
+ yaffs_DestroyObject(l);
|
|
+
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
|
|
+
|
|
+ if(alloc_failed){
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/*------------------------------ Directory Functions ----------------------------- */
|
|
+
|
|
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
|
|
+{
|
|
+ yaffs_Device *dev = obj->myDev;
|
|
+
|
|
+ if(dev && dev->removeObjectCallback)
|
|
+ dev->removeObjectCallback(obj);
|
|
+
|
|
+ list_del_init(&obj->siblings);
|
|
+ obj->parent = NULL;
|
|
+}
|
|
+
|
|
+
|
|
+static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
|
|
+ yaffs_Object * obj)
|
|
+{
|
|
+
|
|
+ if (!directory) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragedy: Trying to add an object to a null pointer directory"
|
|
+ TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragedy: Trying to add an object to a non-directory"
|
|
+ TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ if (obj->siblings.prev == NULL) {
|
|
+ /* Not initialised */
|
|
+ INIT_LIST_HEAD(&obj->siblings);
|
|
+
|
|
+ } else if (!list_empty(&obj->siblings)) {
|
|
+ /* If it is holed up somewhere else, un hook it */
|
|
+ yaffs_RemoveObjectFromDirectory(obj);
|
|
+ }
|
|
+ /* Now add it */
|
|
+ list_add(&obj->siblings, &directory->variant.directoryVariant.children);
|
|
+ obj->parent = directory;
|
|
+
|
|
+ if (directory == obj->myDev->unlinkedDir
|
|
+ || directory == obj->myDev->deletedDir) {
|
|
+ obj->unlinked = 1;
|
|
+ obj->myDev->nUnlinkedFiles++;
|
|
+ obj->renameAllowed = 0;
|
|
+ }
|
|
+}
|
|
+
|
|
+yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
|
|
+ const YCHAR * name)
|
|
+{
|
|
+ int sum;
|
|
+
|
|
+ struct list_head *i;
|
|
+ YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
|
|
+
|
|
+ yaffs_Object *l;
|
|
+
|
|
+ if (!name) {
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ if (!directory) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragedy: yaffs_FindObjectByName: null pointer directory"
|
|
+ TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ sum = yaffs_CalcNameSum(name);
|
|
+
|
|
+ list_for_each(i, &directory->variant.directoryVariant.children) {
|
|
+ if (i) {
|
|
+ l = list_entry(i, yaffs_Object, siblings);
|
|
+
|
|
+ yaffs_CheckObjectDetailsLoaded(l);
|
|
+
|
|
+ /* Special case for lost-n-found */
|
|
+ if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
|
|
+ if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) {
|
|
+ return l;
|
|
+ }
|
|
+ } else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0)
|
|
+ {
|
|
+ /* LostnFound cunk called Objxxx
|
|
+ * Do a real check
|
|
+ */
|
|
+ yaffs_GetObjectName(l, buffer,
|
|
+ YAFFS_MAX_NAME_LENGTH);
|
|
+ if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) {
|
|
+ return l;
|
|
+ }
|
|
+
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+
|
|
+#if 0
|
|
+int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
|
|
+ int (*fn) (yaffs_Object *))
|
|
+{
|
|
+ struct list_head *i;
|
|
+ yaffs_Object *l;
|
|
+
|
|
+ if (!theDir) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragedy: yaffs_FindObjectByName: null pointer directory"
|
|
+ TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+ if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ list_for_each(i, &theDir->variant.directoryVariant.children) {
|
|
+ if (i) {
|
|
+ l = list_entry(i, yaffs_Object, siblings);
|
|
+ if (l && !fn(l)) {
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+#endif
|
|
+
|
|
+/* GetEquivalentObject dereferences any hard links to get to the
|
|
+ * actual object.
|
|
+ */
|
|
+
|
|
+yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj)
|
|
+{
|
|
+ if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
+ /* We want the object id of the equivalent object, not this one */
|
|
+ obj = obj->variant.hardLinkVariant.equivalentObject;
|
|
+ yaffs_CheckObjectDetailsLoaded(obj);
|
|
+ }
|
|
+ return obj;
|
|
+
|
|
+}
|
|
+
|
|
+int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
|
|
+{
|
|
+ memset(name, 0, buffSize * sizeof(YCHAR));
|
|
+
|
|
+ yaffs_CheckObjectDetailsLoaded(obj);
|
|
+
|
|
+ if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
|
|
+ yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
|
|
+ } else if (obj->chunkId <= 0) {
|
|
+ YCHAR locName[20];
|
|
+ /* make up a name */
|
|
+ yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX,
|
|
+ obj->objectId);
|
|
+ yaffs_strncpy(name, locName, buffSize - 1);
|
|
+
|
|
+ }
|
|
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
|
+ else if (obj->shortName[0]) {
|
|
+ yaffs_strcpy(name, obj->shortName);
|
|
+ }
|
|
+#endif
|
|
+ else {
|
|
+ int result;
|
|
+ __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
|
|
+
|
|
+ yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
|
|
+
|
|
+ memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
|
|
+
|
|
+ if (obj->chunkId >= 0) {
|
|
+ result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
|
|
+ obj->chunkId, buffer,
|
|
+ NULL);
|
|
+ }
|
|
+ yaffs_strncpy(name, oh->name, buffSize - 1);
|
|
+
|
|
+ yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
|
|
+ }
|
|
+
|
|
+ return yaffs_strlen(name);
|
|
+}
|
|
+
|
|
+int yaffs_GetObjectFileLength(yaffs_Object * obj)
|
|
+{
|
|
+
|
|
+ /* Dereference any hard linking */
|
|
+ obj = yaffs_GetEquivalentObject(obj);
|
|
+
|
|
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
|
|
+ return obj->variant.fileVariant.fileSize;
|
|
+ }
|
|
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
|
|
+ return yaffs_strlen(obj->variant.symLinkVariant.alias);
|
|
+ } else {
|
|
+ /* Only a directory should drop through to here */
|
|
+ return obj->myDev->nDataBytesPerChunk;
|
|
+ }
|
|
+}
|
|
+
|
|
+int yaffs_GetObjectLinkCount(yaffs_Object * obj)
|
|
+{
|
|
+ int count = 0;
|
|
+ struct list_head *i;
|
|
+
|
|
+ if (!obj->unlinked) {
|
|
+ count++; /* the object itself */
|
|
+ }
|
|
+ list_for_each(i, &obj->hardLinks) {
|
|
+ count++; /* add the hard links; */
|
|
+ }
|
|
+ return count;
|
|
+
|
|
+}
|
|
+
|
|
+int yaffs_GetObjectInode(yaffs_Object * obj)
|
|
+{
|
|
+ obj = yaffs_GetEquivalentObject(obj);
|
|
+
|
|
+ return obj->objectId;
|
|
+}
|
|
+
|
|
+unsigned yaffs_GetObjectType(yaffs_Object * obj)
|
|
+{
|
|
+ obj = yaffs_GetEquivalentObject(obj);
|
|
+
|
|
+ switch (obj->variantType) {
|
|
+ case YAFFS_OBJECT_TYPE_FILE:
|
|
+ return DT_REG;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
+ return DT_DIR;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
+ return DT_LNK;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
+ return DT_REG;
|
|
+ break;
|
|
+ case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
+ if (S_ISFIFO(obj->yst_mode))
|
|
+ return DT_FIFO;
|
|
+ if (S_ISCHR(obj->yst_mode))
|
|
+ return DT_CHR;
|
|
+ if (S_ISBLK(obj->yst_mode))
|
|
+ return DT_BLK;
|
|
+ if (S_ISSOCK(obj->yst_mode))
|
|
+ return DT_SOCK;
|
|
+ default:
|
|
+ return DT_REG;
|
|
+ break;
|
|
+ }
|
|
+}
|
|
+
|
|
+YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj)
|
|
+{
|
|
+ obj = yaffs_GetEquivalentObject(obj);
|
|
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
|
|
+ return yaffs_CloneString(obj->variant.symLinkVariant.alias);
|
|
+ } else {
|
|
+ return yaffs_CloneString(_Y(""));
|
|
+ }
|
|
+}
|
|
+
|
|
+#ifndef CONFIG_YAFFS_WINCE
|
|
+
|
|
+int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr)
|
|
+{
|
|
+ unsigned int valid = attr->ia_valid;
|
|
+
|
|
+ if (valid & ATTR_MODE)
|
|
+ obj->yst_mode = attr->ia_mode;
|
|
+ if (valid & ATTR_UID)
|
|
+ obj->yst_uid = attr->ia_uid;
|
|
+ if (valid & ATTR_GID)
|
|
+ obj->yst_gid = attr->ia_gid;
|
|
+
|
|
+ if (valid & ATTR_ATIME)
|
|
+ obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
|
|
+ if (valid & ATTR_CTIME)
|
|
+ obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
|
|
+ if (valid & ATTR_MTIME)
|
|
+ obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
|
|
+
|
|
+ if (valid & ATTR_SIZE)
|
|
+ yaffs_ResizeFile(obj, attr->ia_size);
|
|
+
|
|
+ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
|
|
+
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr)
|
|
+{
|
|
+ unsigned int valid = 0;
|
|
+
|
|
+ attr->ia_mode = obj->yst_mode;
|
|
+ valid |= ATTR_MODE;
|
|
+ attr->ia_uid = obj->yst_uid;
|
|
+ valid |= ATTR_UID;
|
|
+ attr->ia_gid = obj->yst_gid;
|
|
+ valid |= ATTR_GID;
|
|
+
|
|
+ Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
|
|
+ valid |= ATTR_ATIME;
|
|
+ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
|
|
+ valid |= ATTR_CTIME;
|
|
+ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
|
|
+ valid |= ATTR_MTIME;
|
|
+
|
|
+ attr->ia_size = yaffs_GetFileSize(obj);
|
|
+ valid |= ATTR_SIZE;
|
|
+
|
|
+ attr->ia_valid = valid;
|
|
+
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+
|
|
+#endif
|
|
+
|
|
+#if 0
|
|
+int yaffs_DumpObject(yaffs_Object * obj)
|
|
+{
|
|
+ YCHAR name[257];
|
|
+
|
|
+ yaffs_GetObjectName(obj, name, 256);
|
|
+
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
|
|
+ " chunk %d type %d size %d\n"
|
|
+ TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
|
|
+ obj->dirty, obj->valid, obj->serial, obj->sum, obj->chunkId,
|
|
+ yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+#endif
|
|
+
|
|
+/*---------------------------- Initialisation code -------------------------------------- */
|
|
+
|
|
+static int yaffs_CheckDevFunctions(const yaffs_Device * dev)
|
|
+{
|
|
+
|
|
+ /* Common functions, gotta have */
|
|
+ if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
|
|
+ return 0;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_YAFFS2
|
|
+
|
|
+ /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
|
|
+ if (dev->writeChunkWithTagsToNAND &&
|
|
+ dev->readChunkWithTagsFromNAND &&
|
|
+ !dev->writeChunkToNAND &&
|
|
+ !dev->readChunkFromNAND &&
|
|
+ dev->markNANDBlockBad && dev->queryNANDBlock)
|
|
+ return 1;
|
|
+#endif
|
|
+
|
|
+ /* Can use the "spare" style interface for yaffs1 */
|
|
+ if (!dev->isYaffs2 &&
|
|
+ !dev->writeChunkWithTagsToNAND &&
|
|
+ !dev->readChunkWithTagsFromNAND &&
|
|
+ dev->writeChunkToNAND &&
|
|
+ dev->readChunkFromNAND &&
|
|
+ !dev->markNANDBlockBad && !dev->queryNANDBlock)
|
|
+ return 1;
|
|
+
|
|
+ return 0; /* bad */
|
|
+}
|
|
+
|
|
+
|
|
+static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
|
|
+{
|
|
+ /* Initialise the unlinked, deleted, root and lost and found directories */
|
|
+
|
|
+ dev->lostNFoundDir = dev->rootDir = NULL;
|
|
+ dev->unlinkedDir = dev->deletedDir = NULL;
|
|
+
|
|
+ dev->unlinkedDir =
|
|
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
|
|
+
|
|
+ dev->deletedDir =
|
|
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
|
|
+
|
|
+ dev->rootDir =
|
|
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
|
|
+ YAFFS_ROOT_MODE | S_IFDIR);
|
|
+ dev->lostNFoundDir =
|
|
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
|
|
+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
|
|
+
|
|
+ if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){
|
|
+ yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
|
|
+ return YAFFS_OK;
|
|
+ }
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int yaffs_GutsInitialise(yaffs_Device * dev)
|
|
+{
|
|
+ int init_failed = 0;
|
|
+ unsigned x;
|
|
+ int bits;
|
|
+
|
|
+ T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
|
|
+
|
|
+ /* Check stuff that must be set */
|
|
+
|
|
+ if (!dev) {
|
|
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ dev->internalStartBlock = dev->startBlock;
|
|
+ dev->internalEndBlock = dev->endBlock;
|
|
+ dev->blockOffset = 0;
|
|
+ dev->chunkOffset = 0;
|
|
+ dev->nFreeChunks = 0;
|
|
+
|
|
+ if (dev->startBlock == 0) {
|
|
+ dev->internalStartBlock = dev->startBlock + 1;
|
|
+ dev->internalEndBlock = dev->endBlock + 1;
|
|
+ dev->blockOffset = 1;
|
|
+ dev->chunkOffset = dev->nChunksPerBlock;
|
|
+ }
|
|
+
|
|
+ /* Check geometry parameters. */
|
|
+
|
|
+ if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) ||
|
|
+ (!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) ||
|
|
+ dev->nChunksPerBlock < 2 ||
|
|
+ dev->nReservedBlocks < 2 ||
|
|
+ dev->internalStartBlock <= 0 ||
|
|
+ dev->internalEndBlock <= 0 ||
|
|
+ dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
|
|
+ ) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s "
|
|
+ TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : ""));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Got the right mix of functions? */
|
|
+ if (!yaffs_CheckDevFunctions(dev)) {
|
|
+ /* Function missing */
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR
|
|
+ ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* This is really a compilation check. */
|
|
+ if (!yaffs_CheckStructures()) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ if (dev->isMounted) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs: device already mounted\n" TENDSTR)));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Finished with most checks. One or two more checks happen later on too. */
|
|
+
|
|
+ dev->isMounted = 1;
|
|
+
|
|
+
|
|
+
|
|
+ /* OK now calculate a few things for the device */
|
|
+
|
|
+ /*
|
|
+ * Calculate all the chunk size manipulation numbers:
|
|
+ */
|
|
+ /* Start off assuming it is a power of 2 */
|
|
+ dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk);
|
|
+ dev->chunkMask = (1<<dev->chunkShift) - 1;
|
|
+
|
|
+ if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){
|
|
+ /* Yes it is a power of 2, disable crumbs */
|
|
+ dev->crumbMask = 0;
|
|
+ dev->crumbShift = 0;
|
|
+ dev->crumbsPerChunk = 0;
|
|
+ } else {
|
|
+ /* Not a power of 2, use crumbs instead */
|
|
+ dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart));
|
|
+ dev->crumbMask = (1<<dev->crumbShift)-1;
|
|
+ dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift);
|
|
+ dev->chunkShift = 0;
|
|
+ dev->chunkMask = 0;
|
|
+ }
|
|
+
|
|
+
|
|
+ /*
|
|
+ * Calculate chunkGroupBits.
|
|
+ * We need to find the next power of 2 > than internalEndBlock
|
|
+ */
|
|
+
|
|
+ x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
|
|
+
|
|
+ bits = ShiftsGE(x);
|
|
+
|
|
+ /* Set up tnode width if wide tnodes are enabled. */
|
|
+ if(!dev->wideTnodesDisabled){
|
|
+ /* bits must be even so that we end up with 32-bit words */
|
|
+ if(bits & 1)
|
|
+ bits++;
|
|
+ if(bits < 16)
|
|
+ dev->tnodeWidth = 16;
|
|
+ else
|
|
+ dev->tnodeWidth = bits;
|
|
+ }
|
|
+ else
|
|
+ dev->tnodeWidth = 16;
|
|
+
|
|
+ dev->tnodeMask = (1<<dev->tnodeWidth)-1;
|
|
+
|
|
+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
|
|
+ * so if the bitwidth of the
|
|
+ * chunk range we're using is greater than 16 we need
|
|
+ * to figure out chunk shift and chunkGroupSize
|
|
+ */
|
|
+
|
|
+ if (bits <= dev->tnodeWidth)
|
|
+ dev->chunkGroupBits = 0;
|
|
+ else
|
|
+ dev->chunkGroupBits = bits - dev->tnodeWidth;
|
|
+
|
|
+
|
|
+ dev->chunkGroupSize = 1 << dev->chunkGroupBits;
|
|
+
|
|
+ if (dev->nChunksPerBlock < dev->chunkGroupSize) {
|
|
+ /* We have a problem because the soft delete won't work if
|
|
+ * the chunk group size > chunks per block.
|
|
+ * This can be remedied by using larger "virtual blocks".
|
|
+ */
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs: chunk group too large\n" TENDSTR)));
|
|
+
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* OK, we've finished verifying the device, lets continue with initialisation */
|
|
+
|
|
+ /* More device initialisation */
|
|
+ dev->garbageCollections = 0;
|
|
+ dev->passiveGarbageCollections = 0;
|
|
+ dev->currentDirtyChecker = 0;
|
|
+ dev->bufferedBlock = -1;
|
|
+ dev->doingBufferedBlockRewrite = 0;
|
|
+ dev->nDeletedFiles = 0;
|
|
+ dev->nBackgroundDeletions = 0;
|
|
+ dev->nUnlinkedFiles = 0;
|
|
+ dev->eccFixed = 0;
|
|
+ dev->eccUnfixed = 0;
|
|
+ dev->tagsEccFixed = 0;
|
|
+ dev->tagsEccUnfixed = 0;
|
|
+ dev->nErasureFailures = 0;
|
|
+ dev->nErasedBlocks = 0;
|
|
+ dev->isDoingGC = 0;
|
|
+ dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
|
|
+
|
|
+ /* Initialise temporary buffers and caches. */
|
|
+ if(!yaffs_InitialiseTempBuffers(dev))
|
|
+ init_failed = 1;
|
|
+
|
|
+ dev->srCache = NULL;
|
|
+ dev->gcCleanupList = NULL;
|
|
+
|
|
+
|
|
+ if (!init_failed &&
|
|
+ dev->nShortOpCaches > 0) {
|
|
+ int i;
|
|
+ __u8 *buf;
|
|
+ int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
|
|
+
|
|
+ if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) {
|
|
+ dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
|
|
+ }
|
|
+
|
|
+ buf = dev->srCache = YMALLOC(srCacheBytes);
|
|
+
|
|
+ if(dev->srCache)
|
|
+ memset(dev->srCache,0,srCacheBytes);
|
|
+
|
|
+ for (i = 0; i < dev->nShortOpCaches && buf; i++) {
|
|
+ dev->srCache[i].object = NULL;
|
|
+ dev->srCache[i].lastUse = 0;
|
|
+ dev->srCache[i].dirty = 0;
|
|
+ dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk);
|
|
+ }
|
|
+ if(!buf)
|
|
+ init_failed = 1;
|
|
+
|
|
+ dev->srLastUse = 0;
|
|
+ }
|
|
+
|
|
+ dev->cacheHits = 0;
|
|
+
|
|
+ if(!init_failed){
|
|
+ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
|
|
+ if(!dev->gcCleanupList)
|
|
+ init_failed = 1;
|
|
+ }
|
|
+
|
|
+ if (dev->isYaffs2) {
|
|
+ dev->useHeaderFileSize = 1;
|
|
+ }
|
|
+ if(!init_failed && !yaffs_InitialiseBlocks(dev))
|
|
+ init_failed = 1;
|
|
+
|
|
+ yaffs_InitialiseTnodes(dev);
|
|
+ yaffs_InitialiseObjects(dev);
|
|
+
|
|
+ if(!init_failed && !yaffs_CreateInitialDirectories(dev))
|
|
+ init_failed = 1;
|
|
+
|
|
+
|
|
+ if(!init_failed){
|
|
+ /* Now scan the flash. */
|
|
+ if (dev->isYaffs2) {
|
|
+ if(yaffs_CheckpointRestore(dev)) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("yaffs: restored from checkpoint" TENDSTR)));
|
|
+ } else {
|
|
+
|
|
+ /* Clean up the mess caused by an aborted checkpoint load
|
|
+ * and scan backwards.
|
|
+ */
|
|
+ yaffs_DeinitialiseBlocks(dev);
|
|
+ yaffs_DeinitialiseTnodes(dev);
|
|
+ yaffs_DeinitialiseObjects(dev);
|
|
+
|
|
+
|
|
+ dev->nErasedBlocks = 0;
|
|
+ dev->nFreeChunks = 0;
|
|
+ dev->allocationBlock = -1;
|
|
+ dev->allocationPage = -1;
|
|
+ dev->nDeletedFiles = 0;
|
|
+ dev->nUnlinkedFiles = 0;
|
|
+ dev->nBackgroundDeletions = 0;
|
|
+ dev->oldestDirtySequence = 0;
|
|
+
|
|
+ if(!init_failed && !yaffs_InitialiseBlocks(dev))
|
|
+ init_failed = 1;
|
|
+
|
|
+ yaffs_InitialiseTnodes(dev);
|
|
+ yaffs_InitialiseObjects(dev);
|
|
+
|
|
+ if(!init_failed && !yaffs_CreateInitialDirectories(dev))
|
|
+ init_failed = 1;
|
|
+
|
|
+ if(!init_failed && !yaffs_ScanBackwards(dev))
|
|
+ init_failed = 1;
|
|
+ }
|
|
+ }else
|
|
+ if(!yaffs_Scan(dev))
|
|
+ init_failed = 1;
|
|
+ }
|
|
+
|
|
+ if(init_failed){
|
|
+ /* Clean up the mess */
|
|
+ T(YAFFS_TRACE_TRACING,
|
|
+ (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
|
|
+
|
|
+ yaffs_Deinitialise(dev);
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Zero out stats */
|
|
+ dev->nPageReads = 0;
|
|
+ dev->nPageWrites = 0;
|
|
+ dev->nBlockErasures = 0;
|
|
+ dev->nGCCopies = 0;
|
|
+ dev->nRetriedWrites = 0;
|
|
+
|
|
+ dev->nRetiredBlocks = 0;
|
|
+
|
|
+ yaffs_VerifyFreeChunks(dev);
|
|
+ yaffs_VerifyBlocks(dev);
|
|
+
|
|
+
|
|
+ T(YAFFS_TRACE_TRACING,
|
|
+ (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+
|
|
+void yaffs_Deinitialise(yaffs_Device * dev)
|
|
+{
|
|
+ if (dev->isMounted) {
|
|
+ int i;
|
|
+
|
|
+ yaffs_DeinitialiseBlocks(dev);
|
|
+ yaffs_DeinitialiseTnodes(dev);
|
|
+ yaffs_DeinitialiseObjects(dev);
|
|
+ if (dev->nShortOpCaches > 0 &&
|
|
+ dev->srCache) {
|
|
+
|
|
+ for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if(dev->srCache[i].data)
|
|
+ YFREE(dev->srCache[i].data);
|
|
+ dev->srCache[i].data = NULL;
|
|
+ }
|
|
+
|
|
+ YFREE(dev->srCache);
|
|
+ dev->srCache = NULL;
|
|
+ }
|
|
+
|
|
+ YFREE(dev->gcCleanupList);
|
|
+
|
|
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
|
|
+ YFREE(dev->tempBuffer[i].buffer);
|
|
+ }
|
|
+
|
|
+ dev->isMounted = 0;
|
|
+ }
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_CountFreeChunks(yaffs_Device * dev)
|
|
+{
|
|
+ int nFree;
|
|
+ int b;
|
|
+
|
|
+ yaffs_BlockInfo *blk;
|
|
+
|
|
+ for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
|
|
+ b++) {
|
|
+ blk = yaffs_GetBlockInfo(dev, b);
|
|
+
|
|
+ switch (blk->blockState) {
|
|
+ case YAFFS_BLOCK_STATE_EMPTY:
|
|
+ case YAFFS_BLOCK_STATE_ALLOCATING:
|
|
+ case YAFFS_BLOCK_STATE_COLLECTING:
|
|
+ case YAFFS_BLOCK_STATE_FULL:
|
|
+ nFree +=
|
|
+ (dev->nChunksPerBlock - blk->pagesInUse +
|
|
+ blk->softDeletions);
|
|
+ break;
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ }
|
|
+
|
|
+ return nFree;
|
|
+}
|
|
+
|
|
+int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
|
|
+{
|
|
+ /* This is what we report to the outside world */
|
|
+
|
|
+ int nFree;
|
|
+ int nDirtyCacheChunks;
|
|
+ int blocksForCheckpoint;
|
|
+
|
|
+#if 1
|
|
+ nFree = dev->nFreeChunks;
|
|
+#else
|
|
+ nFree = yaffs_CountFreeChunks(dev);
|
|
+#endif
|
|
+
|
|
+ nFree += dev->nDeletedFiles;
|
|
+
|
|
+ /* Now count the number of dirty chunks in the cache and subtract those */
|
|
+
|
|
+ {
|
|
+ int i;
|
|
+ for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
|
|
+ if (dev->srCache[i].dirty)
|
|
+ nDirtyCacheChunks++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ nFree -= nDirtyCacheChunks;
|
|
+
|
|
+ nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
|
|
+
|
|
+ /* Now we figure out how much to reserve for the checkpoint and report that... */
|
|
+ blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
|
|
+ if(blocksForCheckpoint < 0)
|
|
+ blocksForCheckpoint = 0;
|
|
+
|
|
+ nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
|
|
+
|
|
+ if (nFree < 0)
|
|
+ nFree = 0;
|
|
+
|
|
+ return nFree;
|
|
+
|
|
+}
|
|
+
|
|
+static int yaffs_freeVerificationFailures;
|
|
+
|
|
+static void yaffs_VerifyFreeChunks(yaffs_Device * dev)
|
|
+{
|
|
+ int counted;
|
|
+ int difference;
|
|
+
|
|
+ if(yaffs_SkipVerification(dev))
|
|
+ return;
|
|
+
|
|
+ counted = yaffs_CountFreeChunks(dev);
|
|
+
|
|
+ difference = dev->nFreeChunks - counted;
|
|
+
|
|
+ if (difference) {
|
|
+ T(YAFFS_TRACE_ALWAYS,
|
|
+ (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
|
|
+ dev->nFreeChunks, counted, difference));
|
|
+ yaffs_freeVerificationFailures++;
|
|
+ }
|
|
+}
|
|
+
|
|
+/*---------------------------------------- YAFFS test code ----------------------*/
|
|
+
|
|
+#define yaffs_CheckStruct(structure,syze, name) \
|
|
+ if(sizeof(structure) != syze) \
|
|
+ { \
|
|
+ T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\
|
|
+ name,syze,sizeof(structure))); \
|
|
+ return YAFFS_FAIL; \
|
|
+ }
|
|
+
|
|
+static int yaffs_CheckStructures(void)
|
|
+{
|
|
+/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") */
|
|
+/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") */
|
|
+/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") */
|
|
+#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
|
+ yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode")
|
|
+#endif
|
|
+ yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader")
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_guts.h linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,902 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_GUTS_H__
|
|
+#define __YAFFS_GUTS_H__
|
|
+
|
|
+#include "devextras.h"
|
|
+#include "yportenv.h"
|
|
+
|
|
+#define YAFFS_OK 1
|
|
+#define YAFFS_FAIL 0
|
|
+
|
|
+/* Give us a Y=0x59,
|
|
+ * Give us an A=0x41,
|
|
+ * Give us an FF=0xFF
|
|
+ * Give us an S=0x53
|
|
+ * And what have we got...
|
|
+ */
|
|
+#define YAFFS_MAGIC 0x5941FF53
|
|
+
|
|
+#define YAFFS_NTNODES_LEVEL0 16
|
|
+#define YAFFS_TNODES_LEVEL0_BITS 4
|
|
+#define YAFFS_TNODES_LEVEL0_MASK 0xf
|
|
+
|
|
+#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
|
|
+#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
|
|
+#define YAFFS_TNODES_INTERNAL_MASK 0x7
|
|
+#define YAFFS_TNODES_MAX_LEVEL 6
|
|
+
|
|
+#ifndef CONFIG_YAFFS_NO_YAFFS1
|
|
+#define YAFFS_BYTES_PER_SPARE 16
|
|
+#define YAFFS_BYTES_PER_CHUNK 512
|
|
+#define YAFFS_CHUNK_SIZE_SHIFT 9
|
|
+#define YAFFS_CHUNKS_PER_BLOCK 32
|
|
+#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
|
|
+#endif
|
|
+
|
|
+#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
|
|
+#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
|
|
+
|
|
+#define YAFFS_MAX_CHUNK_ID 0x000FFFFF
|
|
+
|
|
+#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
|
|
+
|
|
+#define YAFFS_ALLOCATION_NOBJECTS 100
|
|
+#define YAFFS_ALLOCATION_NTNODES 100
|
|
+#define YAFFS_ALLOCATION_NLINKS 100
|
|
+
|
|
+#define YAFFS_NOBJECT_BUCKETS 256
|
|
+
|
|
+
|
|
+#define YAFFS_OBJECT_SPACE 0x40000
|
|
+
|
|
+#define YAFFS_CHECKPOINT_VERSION 3
|
|
+
|
|
+#ifdef CONFIG_YAFFS_UNICODE
|
|
+#define YAFFS_MAX_NAME_LENGTH 127
|
|
+#define YAFFS_MAX_ALIAS_LENGTH 79
|
|
+#else
|
|
+#define YAFFS_MAX_NAME_LENGTH 255
|
|
+#define YAFFS_MAX_ALIAS_LENGTH 159
|
|
+#endif
|
|
+
|
|
+#define YAFFS_SHORT_NAME_LENGTH 15
|
|
+
|
|
+/* Some special object ids for pseudo objects */
|
|
+#define YAFFS_OBJECTID_ROOT 1
|
|
+#define YAFFS_OBJECTID_LOSTNFOUND 2
|
|
+#define YAFFS_OBJECTID_UNLINKED 3
|
|
+#define YAFFS_OBJECTID_DELETED 4
|
|
+
|
|
+/* Sseudo object ids for checkpointing */
|
|
+#define YAFFS_OBJECTID_SB_HEADER 0x10
|
|
+#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
|
|
+#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
|
|
+
|
|
+/* */
|
|
+
|
|
+#define YAFFS_MAX_SHORT_OP_CACHES 20
|
|
+
|
|
+#define YAFFS_N_TEMP_BUFFERS 4
|
|
+
|
|
+/* We limit the number attempts at sucessfully saving a chunk of data.
|
|
+ * Small-page devices have 32 pages per block; large-page devices have 64.
|
|
+ * Default to something in the order of 5 to 10 blocks worth of chunks.
|
|
+ */
|
|
+#define YAFFS_WR_ATTEMPTS (5*64)
|
|
+
|
|
+/* Sequence numbers are used in YAFFS2 to determine block allocation order.
|
|
+ * The range is limited slightly to help distinguish bad numbers from good.
|
|
+ * This also allows us to perhaps in the future use special numbers for
|
|
+ * special purposes.
|
|
+ * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years,
|
|
+ * and is a larger number than the lifetime of a 2GB device.
|
|
+ */
|
|
+#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
|
|
+#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
|
|
+
|
|
+/* ChunkCache is used for short read/write operations.*/
|
|
+typedef struct {
|
|
+ struct yaffs_ObjectStruct *object;
|
|
+ int chunkId;
|
|
+ int lastUse;
|
|
+ int dirty;
|
|
+ int nBytes; /* Only valid if the cache is dirty */
|
|
+ int locked; /* Can't push out or flush while locked. */
|
|
+#ifdef CONFIG_YAFFS_YAFFS2
|
|
+ __u8 *data;
|
|
+#else
|
|
+ __u8 data[YAFFS_BYTES_PER_CHUNK];
|
|
+#endif
|
|
+} yaffs_ChunkCache;
|
|
+
|
|
+
|
|
+
|
|
+/* Tags structures in RAM
|
|
+ * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise
|
|
+ * the structure size will get blown out.
|
|
+ */
|
|
+
|
|
+#ifndef CONFIG_YAFFS_NO_YAFFS1
|
|
+typedef struct {
|
|
+ unsigned chunkId:20;
|
|
+ unsigned serialNumber:2;
|
|
+ unsigned byteCount:10;
|
|
+ unsigned objectId:18;
|
|
+ unsigned ecc:12;
|
|
+ unsigned unusedStuff:2;
|
|
+
|
|
+} yaffs_Tags;
|
|
+
|
|
+typedef union {
|
|
+ yaffs_Tags asTags;
|
|
+ __u8 asBytes[8];
|
|
+} yaffs_TagsUnion;
|
|
+
|
|
+#endif
|
|
+
|
|
+/* Stuff used for extended tags in YAFFS2 */
|
|
+
|
|
+typedef enum {
|
|
+ YAFFS_ECC_RESULT_UNKNOWN,
|
|
+ YAFFS_ECC_RESULT_NO_ERROR,
|
|
+ YAFFS_ECC_RESULT_FIXED,
|
|
+ YAFFS_ECC_RESULT_UNFIXED
|
|
+} yaffs_ECCResult;
|
|
+
|
|
+typedef enum {
|
|
+ YAFFS_OBJECT_TYPE_UNKNOWN,
|
|
+ YAFFS_OBJECT_TYPE_FILE,
|
|
+ YAFFS_OBJECT_TYPE_SYMLINK,
|
|
+ YAFFS_OBJECT_TYPE_DIRECTORY,
|
|
+ YAFFS_OBJECT_TYPE_HARDLINK,
|
|
+ YAFFS_OBJECT_TYPE_SPECIAL
|
|
+} yaffs_ObjectType;
|
|
+
|
|
+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
|
|
+
|
|
+typedef struct {
|
|
+
|
|
+ unsigned validMarker0;
|
|
+ unsigned chunkUsed; /* Status of the chunk: used or unused */
|
|
+ unsigned objectId; /* If 0 then this is not part of an object (unused) */
|
|
+ unsigned chunkId; /* If 0 then this is a header, else a data chunk */
|
|
+ unsigned byteCount; /* Only valid for data chunks */
|
|
+
|
|
+ /* The following stuff only has meaning when we read */
|
|
+ yaffs_ECCResult eccResult;
|
|
+ unsigned blockBad;
|
|
+
|
|
+ /* YAFFS 1 stuff */
|
|
+ unsigned chunkDeleted; /* The chunk is marked deleted */
|
|
+ unsigned serialNumber; /* Yaffs1 2-bit serial number */
|
|
+
|
|
+ /* YAFFS2 stuff */
|
|
+ unsigned sequenceNumber; /* The sequence number of this block */
|
|
+
|
|
+ /* Extra info if this is an object header (YAFFS2 only) */
|
|
+
|
|
+ unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */
|
|
+ unsigned extraParentObjectId; /* The parent object */
|
|
+ unsigned extraIsShrinkHeader; /* Is it a shrink header? */
|
|
+ unsigned extraShadows; /* Does this shadow another object? */
|
|
+
|
|
+ yaffs_ObjectType extraObjectType; /* What object type? */
|
|
+
|
|
+ unsigned extraFileLength; /* Length if it is a file */
|
|
+ unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */
|
|
+
|
|
+ unsigned validMarker1;
|
|
+
|
|
+} yaffs_ExtendedTags;
|
|
+
|
|
+/* Spare structure for YAFFS1 */
|
|
+typedef struct {
|
|
+ __u8 tagByte0;
|
|
+ __u8 tagByte1;
|
|
+ __u8 tagByte2;
|
|
+ __u8 tagByte3;
|
|
+ __u8 pageStatus; /* set to 0 to delete the chunk */
|
|
+ __u8 blockStatus;
|
|
+ __u8 tagByte4;
|
|
+ __u8 tagByte5;
|
|
+ __u8 ecc1[3];
|
|
+ __u8 tagByte6;
|
|
+ __u8 tagByte7;
|
|
+ __u8 ecc2[3];
|
|
+} yaffs_Spare;
|
|
+
|
|
+/*Special structure for passing through to mtd */
|
|
+struct yaffs_NANDSpare {
|
|
+ yaffs_Spare spare;
|
|
+ int eccres1;
|
|
+ int eccres2;
|
|
+};
|
|
+
|
|
+/* Block data in RAM */
|
|
+
|
|
+typedef enum {
|
|
+ YAFFS_BLOCK_STATE_UNKNOWN = 0,
|
|
+
|
|
+ YAFFS_BLOCK_STATE_SCANNING,
|
|
+ YAFFS_BLOCK_STATE_NEEDS_SCANNING,
|
|
+ /* The block might have something on it (ie it is allocating or full, perhaps empty)
|
|
+ * but it needs to be scanned to determine its true state.
|
|
+ * This state is only valid during yaffs_Scan.
|
|
+ * NB We tolerate empty because the pre-scanner might be incapable of deciding
|
|
+ * However, if this state is returned on a YAFFS2 device, then we expect a sequence number
|
|
+ */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_EMPTY,
|
|
+ /* This block is empty */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_ALLOCATING,
|
|
+ /* This block is partially allocated.
|
|
+ * At least one page holds valid data.
|
|
+ * This is the one currently being used for page
|
|
+ * allocation. Should never be more than one of these
|
|
+ */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_FULL,
|
|
+ /* All the pages in this block have been allocated.
|
|
+ */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_DIRTY,
|
|
+ /* All pages have been allocated and deleted.
|
|
+ * Erase me, reuse me.
|
|
+ */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_CHECKPOINT,
|
|
+ /* This block is assigned to holding checkpoint data.
|
|
+ */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_COLLECTING,
|
|
+ /* This block is being garbage collected */
|
|
+
|
|
+ YAFFS_BLOCK_STATE_DEAD
|
|
+ /* This block has failed and is not in use */
|
|
+} yaffs_BlockState;
|
|
+
|
|
+#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
|
|
+
|
|
+
|
|
+typedef struct {
|
|
+
|
|
+ int softDeletions:10; /* number of soft deleted pages */
|
|
+ int pagesInUse:10; /* number of pages in use */
|
|
+ yaffs_BlockState blockState:4; /* One of the above block states */
|
|
+ __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
|
|
+ /* and retire the block. */
|
|
+ __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */
|
|
+ __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block.
|
|
+ It should be prioritised for GC */
|
|
+ __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
|
|
+
|
|
+#ifdef CONFIG_YAFFS_YAFFS2
|
|
+ __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
|
|
+ __u32 sequenceNumber; /* block sequence number for yaffs2 */
|
|
+#endif
|
|
+
|
|
+} yaffs_BlockInfo;
|
|
+
|
|
+/* -------------------------- Object structure -------------------------------*/
|
|
+/* This is the object structure as stored on NAND */
|
|
+
|
|
+typedef struct {
|
|
+ yaffs_ObjectType type;
|
|
+
|
|
+ /* Apply to everything */
|
|
+ int parentObjectId;
|
|
+ __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
|
|
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
|
|
+
|
|
+ /* Thes following apply to directories, files, symlinks - not hard links */
|
|
+ __u32 yst_mode; /* protection */
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ __u32 notForWinCE[5];
|
|
+#else
|
|
+ __u32 yst_uid;
|
|
+ __u32 yst_gid;
|
|
+ __u32 yst_atime;
|
|
+ __u32 yst_mtime;
|
|
+ __u32 yst_ctime;
|
|
+#endif
|
|
+
|
|
+ /* File size applies to files only */
|
|
+ int fileSize;
|
|
+
|
|
+ /* Equivalent object id applies to hard links only. */
|
|
+ int equivalentObjectId;
|
|
+
|
|
+ /* Alias is for symlinks only. */
|
|
+ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
|
|
+
|
|
+ __u32 yst_rdev; /* device stuff for block and char devices (major/min) */
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ __u32 win_ctime[2];
|
|
+ __u32 win_atime[2];
|
|
+ __u32 win_mtime[2];
|
|
+ __u32 roomToGrow[4];
|
|
+#else
|
|
+ __u32 roomToGrow[10];
|
|
+#endif
|
|
+
|
|
+ int shadowsObject; /* This object header shadows the specified object if > 0 */
|
|
+
|
|
+ /* isShrink applies to object headers written when we shrink the file (ie resize) */
|
|
+ __u32 isShrink;
|
|
+
|
|
+} yaffs_ObjectHeader;
|
|
+
|
|
+/*--------------------------- Tnode -------------------------- */
|
|
+
|
|
+union yaffs_Tnode_union {
|
|
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
|
+ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
|
|
+#else
|
|
+ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
|
|
+#endif
|
|
+/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
|
|
+
|
|
+};
|
|
+
|
|
+typedef union yaffs_Tnode_union yaffs_Tnode;
|
|
+
|
|
+struct yaffs_TnodeList_struct {
|
|
+ struct yaffs_TnodeList_struct *next;
|
|
+ yaffs_Tnode *tnodes;
|
|
+};
|
|
+
|
|
+typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
|
|
+
|
|
+/*------------------------ Object -----------------------------*/
|
|
+/* An object can be one of:
|
|
+ * - a directory (no data, has children links
|
|
+ * - a regular file (data.... not prunes :->).
|
|
+ * - a symlink [symbolic link] (the alias).
|
|
+ * - a hard link
|
|
+ */
|
|
+
|
|
+typedef struct {
|
|
+ __u32 fileSize;
|
|
+ __u32 scannedFileSize;
|
|
+ __u32 shrinkSize;
|
|
+ int topLevel;
|
|
+ yaffs_Tnode *top;
|
|
+} yaffs_FileStructure;
|
|
+
|
|
+typedef struct {
|
|
+ struct list_head children; /* list of child links */
|
|
+} yaffs_DirectoryStructure;
|
|
+
|
|
+typedef struct {
|
|
+ YCHAR *alias;
|
|
+} yaffs_SymLinkStructure;
|
|
+
|
|
+typedef struct {
|
|
+ struct yaffs_ObjectStruct *equivalentObject;
|
|
+ __u32 equivalentObjectId;
|
|
+} yaffs_HardLinkStructure;
|
|
+
|
|
+typedef union {
|
|
+ yaffs_FileStructure fileVariant;
|
|
+ yaffs_DirectoryStructure directoryVariant;
|
|
+ yaffs_SymLinkStructure symLinkVariant;
|
|
+ yaffs_HardLinkStructure hardLinkVariant;
|
|
+} yaffs_ObjectVariant;
|
|
+
|
|
+struct yaffs_ObjectStruct {
|
|
+ __u8 deleted:1; /* This should only apply to unlinked files. */
|
|
+ __u8 softDeleted:1; /* it has also been soft deleted */
|
|
+ __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/
|
|
+ __u8 fake:1; /* A fake object has no presence on NAND. */
|
|
+ __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */
|
|
+ __u8 unlinkAllowed:1;
|
|
+ __u8 dirty:1; /* the object needs to be written to flash */
|
|
+ __u8 valid:1; /* When the file system is being loaded up, this
|
|
+ * object might be created before the data
|
|
+ * is available (ie. file data records appear before the header).
|
|
+ */
|
|
+ __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */
|
|
+
|
|
+ __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is
|
|
+ * still in the inode cache. Free of object is defered.
|
|
+ * until the inode is released.
|
|
+ */
|
|
+
|
|
+ __u8 serial; /* serial number of chunk in NAND. Cached here */
|
|
+ __u16 sum; /* sum of the name to speed searching */
|
|
+
|
|
+ struct yaffs_DeviceStruct *myDev; /* The device I'm on */
|
|
+
|
|
+ struct list_head hashLink; /* list of objects in this hash bucket */
|
|
+
|
|
+ struct list_head hardLinks; /* all the equivalent hard linked objects */
|
|
+
|
|
+ /* directory structure stuff */
|
|
+ /* also used for linking up the free list */
|
|
+ struct yaffs_ObjectStruct *parent;
|
|
+ struct list_head siblings;
|
|
+
|
|
+ /* Where's my object header in NAND? */
|
|
+ int chunkId;
|
|
+
|
|
+ int nDataChunks; /* Number of data chunks attached to the file. */
|
|
+
|
|
+ __u32 objectId; /* the object id value */
|
|
+
|
|
+ __u32 yst_mode;
|
|
+
|
|
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
|
+ YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
|
|
+#endif
|
|
+
|
|
+#ifndef __KERNEL__
|
|
+ __u32 inUse;
|
|
+#endif
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+ __u32 win_ctime[2];
|
|
+ __u32 win_mtime[2];
|
|
+ __u32 win_atime[2];
|
|
+#else
|
|
+ __u32 yst_uid;
|
|
+ __u32 yst_gid;
|
|
+ __u32 yst_atime;
|
|
+ __u32 yst_mtime;
|
|
+ __u32 yst_ctime;
|
|
+#endif
|
|
+
|
|
+ __u32 yst_rdev;
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+ struct inode *myInode;
|
|
+
|
|
+#endif
|
|
+
|
|
+ yaffs_ObjectType variantType;
|
|
+
|
|
+ yaffs_ObjectVariant variant;
|
|
+
|
|
+};
|
|
+
|
|
+typedef struct yaffs_ObjectStruct yaffs_Object;
|
|
+
|
|
+struct yaffs_ObjectList_struct {
|
|
+ yaffs_Object *objects;
|
|
+ struct yaffs_ObjectList_struct *next;
|
|
+};
|
|
+
|
|
+typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
|
|
+
|
|
+typedef struct {
|
|
+ struct list_head list;
|
|
+ int count;
|
|
+} yaffs_ObjectBucket;
|
|
+
|
|
+
|
|
+/* yaffs_CheckpointObject holds the definition of an object as dumped
|
|
+ * by checkpointing.
|
|
+ */
|
|
+
|
|
+typedef struct {
|
|
+ int structType;
|
|
+ __u32 objectId;
|
|
+ __u32 parentId;
|
|
+ int chunkId;
|
|
+
|
|
+ yaffs_ObjectType variantType:3;
|
|
+ __u8 deleted:1;
|
|
+ __u8 softDeleted:1;
|
|
+ __u8 unlinked:1;
|
|
+ __u8 fake:1;
|
|
+ __u8 renameAllowed:1;
|
|
+ __u8 unlinkAllowed:1;
|
|
+ __u8 serial;
|
|
+
|
|
+ int nDataChunks;
|
|
+ __u32 fileSizeOrEquivalentObjectId;
|
|
+
|
|
+}yaffs_CheckpointObject;
|
|
+
|
|
+/*--------------------- Temporary buffers ----------------
|
|
+ *
|
|
+ * These are chunk-sized working buffers. Each device has a few
|
|
+ */
|
|
+
|
|
+typedef struct {
|
|
+ __u8 *buffer;
|
|
+ int line; /* track from whence this buffer was allocated */
|
|
+ int maxLine;
|
|
+} yaffs_TempBuffer;
|
|
+
|
|
+/*----------------- Device ---------------------------------*/
|
|
+
|
|
+struct yaffs_DeviceStruct {
|
|
+ struct list_head devList;
|
|
+ const char *name;
|
|
+
|
|
+ /* Entry parameters set up way early. Yaffs sets up the rest.*/
|
|
+ int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
|
|
+ int nChunksPerBlock; /* does not need to be a power of 2 */
|
|
+ int nBytesPerSpare; /* spare area size */
|
|
+ int startBlock; /* Start block we're allowed to use */
|
|
+ int endBlock; /* End block we're allowed to use */
|
|
+ int nReservedBlocks; /* We want this tuneable so that we can reduce */
|
|
+ /* reserved blocks on NOR and RAM. */
|
|
+
|
|
+
|
|
+ /* Stuff used by the shared space checkpointing mechanism */
|
|
+ /* If this value is zero, then this mechanism is disabled */
|
|
+
|
|
+ int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */
|
|
+
|
|
+
|
|
+
|
|
+
|
|
+ int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
|
|
+ * the number of short op caches (don't use too many)
|
|
+ */
|
|
+
|
|
+ int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
|
|
+
|
|
+ int useNANDECC; /* Flag to decide whether or not to use NANDECC */
|
|
+
|
|
+ void *genericDevice; /* Pointer to device context
|
|
+ * On an mtd this holds the mtd pointer.
|
|
+ */
|
|
+ void *superBlock;
|
|
+
|
|
+ /* NAND access functions (Must be set before calling YAFFS)*/
|
|
+
|
|
+ int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev,
|
|
+ int chunkInNAND, const __u8 * data,
|
|
+ const yaffs_Spare * spare);
|
|
+ int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev,
|
|
+ int chunkInNAND, __u8 * data,
|
|
+ yaffs_Spare * spare);
|
|
+ int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev,
|
|
+ int blockInNAND);
|
|
+ int (*initialiseNAND) (struct yaffs_DeviceStruct * dev);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_YAFFS2
|
|
+ int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev,
|
|
+ int chunkInNAND, const __u8 * data,
|
|
+ const yaffs_ExtendedTags * tags);
|
|
+ int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev,
|
|
+ int chunkInNAND, __u8 * data,
|
|
+ yaffs_ExtendedTags * tags);
|
|
+ int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo);
|
|
+ int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo,
|
|
+ yaffs_BlockState * state, int *sequenceNumber);
|
|
+#endif
|
|
+
|
|
+ int isYaffs2;
|
|
+
|
|
+ /* The removeObjectCallback function must be supplied by OS flavours that
|
|
+ * need it. The Linux kernel does not use this, but yaffs direct does use
|
|
+ * it to implement the faster readdir
|
|
+ */
|
|
+ void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
|
|
+
|
|
+ /* Callback to mark the superblock dirsty */
|
|
+ void (*markSuperBlockDirty)(void * superblock);
|
|
+
|
|
+ int wideTnodesDisabled; /* Set to disable wide tnodes */
|
|
+
|
|
+
|
|
+ /* End of stuff that must be set before initialisation. */
|
|
+
|
|
+ /* Checkpoint control. Can be set before or after initialisation */
|
|
+ __u8 skipCheckpointRead;
|
|
+ __u8 skipCheckpointWrite;
|
|
+
|
|
+ /* Runtime parameters. Set up by YAFFS. */
|
|
+
|
|
+ __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
|
|
+ __u16 chunkGroupSize; /* == 2^^chunkGroupBits */
|
|
+
|
|
+ /* Stuff to support wide tnodes */
|
|
+ __u32 tnodeWidth;
|
|
+ __u32 tnodeMask;
|
|
+
|
|
+ /* Stuff to support various file offses to chunk/offset translations */
|
|
+ /* "Crumbs" for nDataBytesPerChunk not being a power of 2 */
|
|
+ __u32 crumbMask;
|
|
+ __u32 crumbShift;
|
|
+ __u32 crumbsPerChunk;
|
|
+
|
|
+ /* Straight shifting for nDataBytesPerChunk being a power of 2 */
|
|
+ __u32 chunkShift;
|
|
+ __u32 chunkMask;
|
|
+
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+
|
|
+ struct semaphore sem; /* Semaphore for waiting on erasure.*/
|
|
+ struct semaphore grossLock; /* Gross locking semaphore */
|
|
+ __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
|
|
+ * at compile time so we have to allocate it.
|
|
+ */
|
|
+ void (*putSuperFunc) (struct super_block * sb);
|
|
+#endif
|
|
+
|
|
+ int isMounted;
|
|
+
|
|
+ int isCheckpointed;
|
|
+
|
|
+
|
|
+ /* Stuff to support block offsetting to support start block zero */
|
|
+ int internalStartBlock;
|
|
+ int internalEndBlock;
|
|
+ int blockOffset;
|
|
+ int chunkOffset;
|
|
+
|
|
+
|
|
+ /* Runtime checkpointing stuff */
|
|
+ int checkpointPageSequence; /* running sequence number of checkpoint pages */
|
|
+ int checkpointByteCount;
|
|
+ int checkpointByteOffset;
|
|
+ __u8 *checkpointBuffer;
|
|
+ int checkpointOpenForWrite;
|
|
+ int blocksInCheckpoint;
|
|
+ int checkpointCurrentChunk;
|
|
+ int checkpointCurrentBlock;
|
|
+ int checkpointNextBlock;
|
|
+ int *checkpointBlockList;
|
|
+ int checkpointMaxBlocks;
|
|
+ __u32 checkpointSum;
|
|
+ __u32 checkpointXor;
|
|
+
|
|
+ /* Block Info */
|
|
+ yaffs_BlockInfo *blockInfo;
|
|
+ __u8 *chunkBits; /* bitmap of chunks in use */
|
|
+ unsigned blockInfoAlt:1; /* was allocated using alternative strategy */
|
|
+ unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */
|
|
+ int chunkBitmapStride; /* Number of bytes of chunkBits per block.
|
|
+ * Must be consistent with nChunksPerBlock.
|
|
+ */
|
|
+
|
|
+ int nErasedBlocks;
|
|
+ int allocationBlock; /* Current block being allocated off */
|
|
+ __u32 allocationPage;
|
|
+ int allocationBlockFinder; /* Used to search for next allocation block */
|
|
+
|
|
+ /* Runtime state */
|
|
+ int nTnodesCreated;
|
|
+ yaffs_Tnode *freeTnodes;
|
|
+ int nFreeTnodes;
|
|
+ yaffs_TnodeList *allocatedTnodeList;
|
|
+
|
|
+ int isDoingGC;
|
|
+
|
|
+ int nObjectsCreated;
|
|
+ yaffs_Object *freeObjects;
|
|
+ int nFreeObjects;
|
|
+
|
|
+ yaffs_ObjectList *allocatedObjectList;
|
|
+
|
|
+ yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
|
|
+
|
|
+ int nFreeChunks;
|
|
+
|
|
+ int currentDirtyChecker; /* Used to find current dirtiest block */
|
|
+
|
|
+ __u32 *gcCleanupList; /* objects to delete at the end of a GC. */
|
|
+ int nonAggressiveSkip; /* GC state/mode */
|
|
+
|
|
+ /* Statistcs */
|
|
+ int nPageWrites;
|
|
+ int nPageReads;
|
|
+ int nBlockErasures;
|
|
+ int nErasureFailures;
|
|
+ int nGCCopies;
|
|
+ int garbageCollections;
|
|
+ int passiveGarbageCollections;
|
|
+ int nRetriedWrites;
|
|
+ int nRetiredBlocks;
|
|
+ int eccFixed;
|
|
+ int eccUnfixed;
|
|
+ int tagsEccFixed;
|
|
+ int tagsEccUnfixed;
|
|
+ int nDeletions;
|
|
+ int nUnmarkedDeletions;
|
|
+
|
|
+ int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
|
|
+
|
|
+ /* Special directories */
|
|
+ yaffs_Object *rootDir;
|
|
+ yaffs_Object *lostNFoundDir;
|
|
+
|
|
+ /* Buffer areas for storing data to recover from write failures TODO
|
|
+ * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
|
|
+ * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
|
|
+ */
|
|
+
|
|
+ int bufferedBlock; /* Which block is buffered here? */
|
|
+ int doingBufferedBlockRewrite;
|
|
+
|
|
+ yaffs_ChunkCache *srCache;
|
|
+ int srLastUse;
|
|
+
|
|
+ int cacheHits;
|
|
+
|
|
+ /* Stuff for background deletion and unlinked files.*/
|
|
+ yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
|
|
+ yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
|
|
+ yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/
|
|
+ int nDeletedFiles; /* Count of files awaiting deletion;*/
|
|
+ int nUnlinkedFiles; /* Count of unlinked files. */
|
|
+ int nBackgroundDeletions; /* Count of background deletions. */
|
|
+
|
|
+
|
|
+ yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
|
|
+ int maxTemp;
|
|
+ int unmanagedTempAllocations;
|
|
+ int unmanagedTempDeallocations;
|
|
+
|
|
+ /* yaffs2 runtime stuff */
|
|
+ unsigned sequenceNumber; /* Sequence number of currently allocating block */
|
|
+ unsigned oldestDirtySequence;
|
|
+
|
|
+};
|
|
+
|
|
+typedef struct yaffs_DeviceStruct yaffs_Device;
|
|
+
|
|
+/* The static layout of bllock usage etc is stored in the super block header */
|
|
+typedef struct {
|
|
+ int StructType;
|
|
+ int version;
|
|
+ int checkpointStartBlock;
|
|
+ int checkpointEndBlock;
|
|
+ int startBlock;
|
|
+ int endBlock;
|
|
+ int rfu[100];
|
|
+} yaffs_SuperBlockHeader;
|
|
+
|
|
+/* The CheckpointDevice structure holds the device information that changes at runtime and
|
|
+ * must be preserved over unmount/mount cycles.
|
|
+ */
|
|
+typedef struct {
|
|
+ int structType;
|
|
+ int nErasedBlocks;
|
|
+ int allocationBlock; /* Current block being allocated off */
|
|
+ __u32 allocationPage;
|
|
+ int nFreeChunks;
|
|
+
|
|
+ int nDeletedFiles; /* Count of files awaiting deletion;*/
|
|
+ int nUnlinkedFiles; /* Count of unlinked files. */
|
|
+ int nBackgroundDeletions; /* Count of background deletions. */
|
|
+
|
|
+ /* yaffs2 runtime stuff */
|
|
+ unsigned sequenceNumber; /* Sequence number of currently allocating block */
|
|
+ unsigned oldestDirtySequence;
|
|
+
|
|
+} yaffs_CheckpointDevice;
|
|
+
|
|
+
|
|
+typedef struct {
|
|
+ int structType;
|
|
+ __u32 magic;
|
|
+ __u32 version;
|
|
+ __u32 head;
|
|
+} yaffs_CheckpointValidity;
|
|
+
|
|
+/* Function to manipulate block info */
|
|
+static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
|
|
+{
|
|
+ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
|
|
+ blk));
|
|
+ YBUG();
|
|
+ }
|
|
+ return &dev->blockInfo[blk - dev->internalStartBlock];
|
|
+}
|
|
+
|
|
+/*----------------------- YAFFS Functions -----------------------*/
|
|
+
|
|
+int yaffs_GutsInitialise(yaffs_Device * dev);
|
|
+void yaffs_Deinitialise(yaffs_Device * dev);
|
|
+
|
|
+int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev);
|
|
+
|
|
+int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
|
|
+ yaffs_Object * newDir, const YCHAR * newName);
|
|
+
|
|
+int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name);
|
|
+int yaffs_DeleteFile(yaffs_Object * obj);
|
|
+
|
|
+int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize);
|
|
+int yaffs_GetObjectFileLength(yaffs_Object * obj);
|
|
+int yaffs_GetObjectInode(yaffs_Object * obj);
|
|
+unsigned yaffs_GetObjectType(yaffs_Object * obj);
|
|
+int yaffs_GetObjectLinkCount(yaffs_Object * obj);
|
|
+
|
|
+int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr);
|
|
+int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr);
|
|
+
|
|
+/* File operations */
|
|
+int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset,
|
|
+ int nBytes);
|
|
+int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset,
|
|
+ int nBytes, int writeThrough);
|
|
+int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize);
|
|
+
|
|
+yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid);
|
|
+int yaffs_FlushFile(yaffs_Object * obj, int updateTime);
|
|
+
|
|
+/* Flushing and checkpointing */
|
|
+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
|
|
+
|
|
+int yaffs_CheckpointSave(yaffs_Device *dev);
|
|
+int yaffs_CheckpointRestore(yaffs_Device *dev);
|
|
+
|
|
+/* Directory operations */
|
|
+yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid);
|
|
+yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name);
|
|
+int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
|
|
+ int (*fn) (yaffs_Object *));
|
|
+
|
|
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number);
|
|
+
|
|
+/* Link operations */
|
|
+yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
|
|
+ yaffs_Object * equivalentObject);
|
|
+
|
|
+yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj);
|
|
+
|
|
+/* Symlink operations */
|
|
+yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid,
|
|
+ const YCHAR * alias);
|
|
+YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj);
|
|
+
|
|
+/* Special inodes (fifos, sockets and devices) */
|
|
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
|
|
+ __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
|
|
+
|
|
+/* Special directories */
|
|
+yaffs_Object *yaffs_Root(yaffs_Device * dev);
|
|
+yaffs_Object *yaffs_LostNFound(yaffs_Device * dev);
|
|
+
|
|
+#ifdef CONFIG_YAFFS_WINCE
|
|
+/* CONFIG_YAFFS_WINCE special stuff */
|
|
+void yfsd_WinFileTimeNow(__u32 target[2]);
|
|
+#endif
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+
|
|
+void yaffs_HandleDeferedFree(yaffs_Object * obj);
|
|
+#endif
|
|
+
|
|
+/* Debug dump */
|
|
+int yaffs_DumpObject(yaffs_Object * obj);
|
|
+
|
|
+void yaffs_GutsTest(yaffs_Device * dev);
|
|
+
|
|
+/* A few useful functions */
|
|
+void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
|
|
+void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn);
|
|
+int yaffs_CheckFF(__u8 * buffer, int nBytes);
|
|
+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,241 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+const char *yaffs_mtdif_c_version =
|
|
+ "$Id: yaffs_mtdif.c,v 1.19 2007-02-14 01:09:06 wookey Exp $";
|
|
+
|
|
+#include "yportenv.h"
|
|
+
|
|
+
|
|
+#include "yaffs_mtdif.h"
|
|
+
|
|
+#include "linux/mtd/mtd.h"
|
|
+#include "linux/types.h"
|
|
+#include "linux/time.h"
|
|
+#include "linux/mtd/nand.h"
|
|
+
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
|
|
+static struct nand_oobinfo yaffs_oobinfo = {
|
|
+ .useecc = 1,
|
|
+ .eccbytes = 6,
|
|
+ .eccpos = {8, 9, 10, 13, 14, 15}
|
|
+};
|
|
+
|
|
+static struct nand_oobinfo yaffs_noeccinfo = {
|
|
+ .useecc = 0,
|
|
+};
|
|
+#endif
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
|
|
+{
|
|
+ oob[0] = spare->tagByte0;
|
|
+ oob[1] = spare->tagByte1;
|
|
+ oob[2] = spare->tagByte2;
|
|
+ oob[3] = spare->tagByte3;
|
|
+ oob[4] = spare->tagByte4;
|
|
+ oob[5] = spare->tagByte5 & 0x3f;
|
|
+ oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80;
|
|
+ oob[5] |= spare->pageStatus == 0 ? 0: 0x40;
|
|
+ oob[6] = spare->tagByte6;
|
|
+ oob[7] = spare->tagByte7;
|
|
+}
|
|
+
|
|
+static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
|
|
+{
|
|
+ struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
|
|
+ spare->tagByte0 = oob[0];
|
|
+ spare->tagByte1 = oob[1];
|
|
+ spare->tagByte2 = oob[2];
|
|
+ spare->tagByte3 = oob[3];
|
|
+ spare->tagByte4 = oob[4];
|
|
+ spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
|
|
+ spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
|
|
+ spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
|
|
+ spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
|
|
+ spare->tagByte6 = oob[6];
|
|
+ spare->tagByte7 = oob[7];
|
|
+ spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
|
|
+
|
|
+ nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
|
|
+}
|
|
+#endif
|
|
+
|
|
+int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data, const yaffs_Spare * spare)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ struct mtd_oob_ops ops;
|
|
+#endif
|
|
+ size_t dummy;
|
|
+ int retval = 0;
|
|
+
|
|
+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ __u8 spareAsBytes[8]; /* OOB */
|
|
+
|
|
+ if (data && !spare)
|
|
+ retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data);
|
|
+ else if (spare) {
|
|
+ if (dev->useNANDECC) {
|
|
+ translate_spare2oob(spare, spareAsBytes);
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.ooblen = 8; /* temp hack */
|
|
+ } else {
|
|
+ ops.mode = MTD_OOB_RAW;
|
|
+ ops.ooblen = YAFFS_BYTES_PER_SPARE;
|
|
+ }
|
|
+ ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
|
|
+ ops.datbuf = (u8 *)data;
|
|
+ ops.ooboffs = 0;
|
|
+ ops.oobbuf = spareAsBytes;
|
|
+ retval = mtd->write_oob(mtd, addr, &ops);
|
|
+ }
|
|
+#else
|
|
+ __u8 *spareAsBytes = (__u8 *) spare;
|
|
+
|
|
+ if (data && spare) {
|
|
+ if (dev->useNANDECC)
|
|
+ retval =
|
|
+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, spareAsBytes,
|
|
+ &yaffs_oobinfo);
|
|
+ else
|
|
+ retval =
|
|
+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, spareAsBytes,
|
|
+ &yaffs_noeccinfo);
|
|
+ } else {
|
|
+ if (data)
|
|
+ retval =
|
|
+ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
|
+ data);
|
|
+ if (spare)
|
|
+ retval =
|
|
+ mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
|
|
+ &dummy, spareAsBytes);
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
|
|
+ yaffs_Spare * spare)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ struct mtd_oob_ops ops;
|
|
+#endif
|
|
+ size_t dummy;
|
|
+ int retval = 0;
|
|
+
|
|
+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ __u8 spareAsBytes[8]; /* OOB */
|
|
+
|
|
+ if (data && !spare)
|
|
+ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data);
|
|
+ else if (spare) {
|
|
+ if (dev->useNANDECC) {
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.ooblen = 8; /* temp hack */
|
|
+ } else {
|
|
+ ops.mode = MTD_OOB_RAW;
|
|
+ ops.ooblen = YAFFS_BYTES_PER_SPARE;
|
|
+ }
|
|
+ ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
|
|
+ ops.datbuf = data;
|
|
+ ops.ooboffs = 0;
|
|
+ ops.oobbuf = spareAsBytes;
|
|
+ retval = mtd->read_oob(mtd, addr, &ops);
|
|
+ if (dev->useNANDECC)
|
|
+ translate_oob2spare(spare, spareAsBytes);
|
|
+ }
|
|
+#else
|
|
+ __u8 *spareAsBytes = (__u8 *) spare;
|
|
+
|
|
+ if (data && spare) {
|
|
+ if (dev->useNANDECC) {
|
|
+ /* Careful, this call adds 2 ints */
|
|
+ /* to the end of the spare data. Calling function */
|
|
+ /* should allocate enough memory for spare, */
|
|
+ /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
|
|
+ retval =
|
|
+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, spareAsBytes,
|
|
+ &yaffs_oobinfo);
|
|
+ } else {
|
|
+ retval =
|
|
+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, spareAsBytes,
|
|
+ &yaffs_noeccinfo);
|
|
+ }
|
|
+ } else {
|
|
+ if (data)
|
|
+ retval =
|
|
+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
|
+ data);
|
|
+ if (spare)
|
|
+ retval =
|
|
+ mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
|
|
+ &dummy, spareAsBytes);
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+ __u32 addr =
|
|
+ ((loff_t) blockNumber) * dev->nDataBytesPerChunk
|
|
+ * dev->nChunksPerBlock;
|
|
+ struct erase_info ei;
|
|
+ int retval = 0;
|
|
+
|
|
+ ei.mtd = mtd;
|
|
+ ei.addr = addr;
|
|
+ ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
|
|
+ ei.time = 1000;
|
|
+ ei.retries = 2;
|
|
+ ei.callback = NULL;
|
|
+ ei.priv = (u_long) dev;
|
|
+
|
|
+ /* Todo finish off the ei if required */
|
|
+
|
|
+ sema_init(&dev->sem, 0);
|
|
+
|
|
+ retval = mtd->erase(mtd, &ei);
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int nandmtd_InitialiseNAND(yaffs_Device * dev)
|
|
+{
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,27 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_MTDIF_H__
|
|
+#define __YAFFS_MTDIF_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data, const yaffs_Spare * spare);
|
|
+int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
|
|
+ yaffs_Spare * spare);
|
|
+int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber);
|
|
+int nandmtd_InitialiseNAND(yaffs_Device * dev);
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1-compat.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1-compat.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1-compat.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1-compat.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,434 @@
|
|
+From ian@brightstareng.com Fri May 18 15:06:49 2007
|
|
+From ian@brightstareng.com Fri May 18 15:08:21 2007
|
|
+Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
|
|
+ by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
|
|
+ (envelope-from <ian@brightstareng.com>)
|
|
+ id 1Hp380-00011e-T6
|
|
+ for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
|
|
+Received: from localhost (localhost.localdomain [127.0.0.1])
|
|
+ by zebra.brightstareng.com (Postfix) with ESMTP
|
|
+ id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
|
|
+Received: from zebra.brightstareng.com ([127.0.0.1])
|
|
+ by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
|
|
+ id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
|
|
+Received: from pippin (unknown [192.168.1.25])
|
|
+ by zebra.brightstareng.com (Postfix) with ESMTP
|
|
+ id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
|
|
+From: Ian McDonnell <ian@brightstareng.com>
|
|
+To: David Goodenough <david.goodenough@linkchoose.co.uk>
|
|
+Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
|
|
+Date: Fri, 18 May 2007 10:06:49 -0400
|
|
+User-Agent: KMail/1.9.1
|
|
+References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
|
|
+In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
|
|
+Cc: Andrea Conti <alyf@alyf.net>,
|
|
+ Charles Manning <manningc2@actrix.gen.nz>
|
|
+MIME-Version: 1.0
|
|
+Content-Type: Multipart/Mixed;
|
|
+ boundary="Boundary-00=_5LbTGmt62YoutxM"
|
|
+Message-Id: <200705181006.49860.ian@brightstareng.com>
|
|
+X-Virus-Scanned: by amavisd-new at brightstareng.com
|
|
+Status: R
|
|
+X-Status: NT
|
|
+X-KMail-EncryptionState:
|
|
+X-KMail-SignatureState:
|
|
+X-KMail-MDN-Sent:
|
|
+
|
|
+--Boundary-00=_5LbTGmt62YoutxM
|
|
+Content-Type: text/plain;
|
|
+ charset="iso-8859-15"
|
|
+Content-Transfer-Encoding: 7bit
|
|
+Content-Disposition: inline
|
|
+
|
|
+David, Andrea,
|
|
+
|
|
+On Friday 18 May 2007 08:34, you wrote:
|
|
+> Yea team. With this fix in place (I put it in the wrong place
|
|
+> at first) I can now mount and ls the Yaffs partition without
|
|
+> an error messages!
|
|
+
|
|
+Good news!
|
|
+
|
|
+Attached is a newer yaffs_mtdif1.c with a bandaid to help the
|
|
+2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
|
|
+See the LINUX_VERSION_CODE conditional in
|
|
+nandmtd1_ReadChunkWithTagsFromNAND.
|
|
+
|
|
+-imcd
|
|
+
|
|
+--Boundary-00=_5LbTGmt62YoutxM
|
|
+Content-Type: text/x-csrc;
|
|
+ charset="iso-8859-15";
|
|
+ name="yaffs_mtdif1.c"
|
|
+Content-Transfer-Encoding: 7bit
|
|
+Content-Disposition: attachment;
|
|
+ filename="yaffs_mtdif1.c"
|
|
+
|
|
+/*
|
|
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
|
|
+ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
|
|
+ *
|
|
+ * Copyright (C) 2002 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * This module provides the interface between yaffs_nand.c and the
|
|
+ * MTD API. This version is used when the MTD interface supports the
|
|
+ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
|
|
+ * and we have small-page NAND device.
|
|
+ *
|
|
+ * These functions are invoked via function pointers in yaffs_nand.c.
|
|
+ * This replaces functionality provided by functions in yaffs_mtdif.c
|
|
+ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
|
|
+ * called in yaffs_mtdif.c when the function pointers are NULL.
|
|
+ * We assume the MTD layer is performing ECC (useNANDECC is true).
|
|
+ */
|
|
+
|
|
+#include "yportenv.h"
|
|
+#include "yaffs_guts.h"
|
|
+#include "yaffs_packedtags1.h"
|
|
+#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
|
|
+
|
|
+#include "linux/kernel.h"
|
|
+#include "linux/version.h"
|
|
+#include "linux/types.h"
|
|
+#include "linux/mtd/mtd.h"
|
|
+
|
|
+/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+
|
|
+const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $";
|
|
+
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+# define YTAG1_SIZE 8
|
|
+#else
|
|
+# define YTAG1_SIZE 9
|
|
+#endif
|
|
+
|
|
+#if 0
|
|
+/* Use the following nand_ecclayout with MTD when using
|
|
+ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
|
|
+ * If you have existing Yaffs images and the byte order differs from this,
|
|
+ * adjust 'oobfree' to match your existing Yaffs data.
|
|
+ *
|
|
+ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
|
|
+ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
|
|
+ * the 9th byte.
|
|
+ *
|
|
+ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
|
|
+ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
|
|
+ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
|
|
+ * byte and B is the small-page bad-block indicator byte.
|
|
+ */
|
|
+static struct nand_ecclayout nand_oob_16 = {
|
|
+ .eccbytes = 6,
|
|
+ .eccpos = { 8, 9, 10, 13, 14, 15 },
|
|
+ .oobavail = 9,
|
|
+ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
|
|
+};
|
|
+#endif
|
|
+
|
|
+/* Write a chunk (page) of data to NAND.
|
|
+ *
|
|
+ * Caller always provides ExtendedTags data which are converted to a more
|
|
+ * compact (packed) form for storage in NAND. A mini-ECC runs over the
|
|
+ * contents of the tags meta-data; used to valid the tags when read.
|
|
+ *
|
|
+ * - Pack ExtendedTags to PackedTags1 form
|
|
+ * - Compute mini-ECC for PackedTags1
|
|
+ * - Write data and packed tags to NAND.
|
|
+ *
|
|
+ * Note: Due to the use of the PackedTags1 meta-data which does not include
|
|
+ * a full sequence number (as found in the larger PackedTags2 form) it is
|
|
+ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
|
|
+ * discarded and dirty. This is not ideal: newer NAND parts are supposed
|
|
+ * to be written just once. When Yaffs performs this operation, this
|
|
+ * function is called with a NULL data pointer -- calling MTD write_oob
|
|
+ * without data is valid usage (2.6.17).
|
|
+ *
|
|
+ * Any underlying MTD error results in YAFFS_FAIL.
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
|
|
+ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int chunkBytes = dev->nDataBytesPerChunk;
|
|
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
|
|
+ struct mtd_oob_ops ops;
|
|
+ yaffs_PackedTags1 pt1;
|
|
+ int retval;
|
|
+
|
|
+ /* we assume that PackedTags1 and yaffs_Tags are compatible */
|
|
+ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
|
|
+ compile_time_assertion(sizeof(yaffs_Tags) == 8);
|
|
+
|
|
+ yaffs_PackTags1(&pt1, etags);
|
|
+ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
|
|
+
|
|
+ /* When deleting a chunk, the upper layer provides only skeletal
|
|
+ * etags, one with chunkDeleted set. However, we need to update the
|
|
+ * tags, not erase them completely. So we use the NAND write property
|
|
+ * that only zeroed-bits stick and set tag bytes to all-ones and
|
|
+ * zero just the (not) deleted bit.
|
|
+ */
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+ if (etags->chunkDeleted) {
|
|
+ memset(&pt1, 0xff, 8);
|
|
+ /* clear delete status bit to indicate deleted */
|
|
+ pt1.deleted = 0;
|
|
+ }
|
|
+#else
|
|
+ ((__u8 *)&pt1)[8] = 0xff;
|
|
+ if (etags->chunkDeleted) {
|
|
+ memset(&pt1, 0xff, 8);
|
|
+ /* zero pageStatus byte to indicate deleted */
|
|
+ ((__u8 *)&pt1)[8] = 0;
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ memset(&ops, 0, sizeof(ops));
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.len = (data) ? chunkBytes : 0;
|
|
+ ops.ooblen = YTAG1_SIZE;
|
|
+ ops.datbuf = (__u8 *)data;
|
|
+ ops.oobbuf = (__u8 *)&pt1;
|
|
+
|
|
+ retval = mtd->write_oob(mtd, addr, &ops);
|
|
+ if (retval) {
|
|
+ yaffs_trace(YAFFS_TRACE_MTD,
|
|
+ "write_oob failed, chunk %d, mtd error %d\n",
|
|
+ chunkInNAND, retval);
|
|
+ }
|
|
+ return retval ? YAFFS_FAIL : YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Return with empty ExtendedTags but add eccResult.
|
|
+ */
|
|
+static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
|
|
+{
|
|
+ if (etags) {
|
|
+ memset(etags, 0, sizeof(*etags));
|
|
+ etags->eccResult = eccResult;
|
|
+ }
|
|
+ return retval;
|
|
+}
|
|
+
|
|
+/* Read a chunk (page) from NAND.
|
|
+ *
|
|
+ * Caller expects ExtendedTags data to be usable even on error; that is,
|
|
+ * all members except eccResult and blockBad are zeroed.
|
|
+ *
|
|
+ * - Check ECC results for data (if applicable)
|
|
+ * - Check for blank/erased block (return empty ExtendedTags if blank)
|
|
+ * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
|
|
+ * - Convert PackedTags1 to ExtendedTags
|
|
+ * - Update eccResult and blockBad members to refect state.
|
|
+ *
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
|
|
+ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int chunkBytes = dev->nDataBytesPerChunk;
|
|
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
|
|
+ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+ struct mtd_oob_ops ops;
|
|
+ yaffs_PackedTags1 pt1;
|
|
+ int retval;
|
|
+ int deleted;
|
|
+
|
|
+ memset(&ops, 0, sizeof(ops));
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.len = (data) ? chunkBytes : 0;
|
|
+ ops.ooblen = YTAG1_SIZE;
|
|
+ ops.datbuf = data;
|
|
+ ops.oobbuf = (__u8 *)&pt1;
|
|
+
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
|
|
+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
|
|
+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
|
|
+ */
|
|
+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
|
|
+#endif
|
|
+ /* Read page and oob using MTD.
|
|
+ * Check status and determine ECC result.
|
|
+ */
|
|
+ retval = mtd->read_oob(mtd, addr, &ops);
|
|
+ if (retval) {
|
|
+ yaffs_trace(YAFFS_TRACE_MTD,
|
|
+ "read_oob failed, chunk %d, mtd error %d\n",
|
|
+ chunkInNAND, retval);
|
|
+ }
|
|
+
|
|
+ switch (retval) {
|
|
+ case 0:
|
|
+ /* no error */
|
|
+ break;
|
|
+
|
|
+ case -EUCLEAN:
|
|
+ /* MTD's ECC fixed the data */
|
|
+ eccres = YAFFS_ECC_RESULT_FIXED;
|
|
+ dev->eccFixed++;
|
|
+ break;
|
|
+
|
|
+ case -EBADMSG:
|
|
+ /* MTD's ECC could not fix the data */
|
|
+ dev->eccUnfixed++;
|
|
+ /* fall into... */
|
|
+ default:
|
|
+ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
|
|
+ etags->blockBad = (mtd->block_isbad)(mtd, addr);
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Check for a blank/erased chunk.
|
|
+ */
|
|
+ if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
|
|
+ /* when blank, upper layers want eccResult to be <= NO_ERROR */
|
|
+ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
|
|
+ }
|
|
+
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+ /* Read deleted status (bit) then return it to it's non-deleted
|
|
+ * state before performing tags mini-ECC check. pt1.deleted is
|
|
+ * inverted.
|
|
+ */
|
|
+ deleted = !pt1.deleted;
|
|
+ pt1.deleted = 1;
|
|
+#else
|
|
+ (void) deleted; /* not used */
|
|
+#endif
|
|
+
|
|
+ /* Check the packed tags mini-ECC and correct if necessary/possible.
|
|
+ */
|
|
+ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
|
|
+ switch (retval) {
|
|
+ case 0:
|
|
+ /* no tags error, use MTD result */
|
|
+ break;
|
|
+ case 1:
|
|
+ /* recovered tags-ECC error */
|
|
+ dev->tagsEccFixed++;
|
|
+ eccres = YAFFS_ECC_RESULT_FIXED;
|
|
+ break;
|
|
+ default:
|
|
+ /* unrecovered tags-ECC error */
|
|
+ dev->tagsEccUnfixed++;
|
|
+ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
|
|
+ }
|
|
+
|
|
+ /* Unpack the tags to extended form and set ECC result.
|
|
+ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
|
|
+ */
|
|
+ pt1.shouldBeFF = 0xFFFFFFFF;
|
|
+ yaffs_UnpackTags1(etags, &pt1);
|
|
+ etags->eccResult = eccres;
|
|
+
|
|
+ /* Set deleted state.
|
|
+ */
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+ etags->chunkDeleted = deleted;
|
|
+#else
|
|
+ etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
|
|
+#endif
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Mark a block bad.
|
|
+ *
|
|
+ * This is a persistant state.
|
|
+ * Use of this function should be rare.
|
|
+ *
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
|
|
+ int retval;
|
|
+
|
|
+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
|
|
+
|
|
+ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
|
|
+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Check any MTD prerequists.
|
|
+ *
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
|
|
+{
|
|
+ /* 2.6.18 has mtd->ecclayout->oobavail */
|
|
+ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
|
|
+ int oobavail = mtd->ecclayout->oobavail;
|
|
+
|
|
+ if (oobavail < YTAG1_SIZE) {
|
|
+ yaffs_trace(YAFFS_TRACE_ERROR,
|
|
+ "mtd device has only %d bytes for tags, need %d",
|
|
+ oobavail, YTAG1_SIZE);
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Query for the current state of a specific block.
|
|
+ *
|
|
+ * Examine the tags of the first chunk of the block and return the state:
|
|
+ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
|
|
+ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
|
|
+ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
|
|
+ *
|
|
+ * Always returns YAFFS_OK.
|
|
+ */
|
|
+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
|
+ yaffs_BlockState * pState, int *pSequenceNumber)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int chunkNo = blockNo * dev->nChunksPerBlock;
|
|
+ yaffs_ExtendedTags etags;
|
|
+ int state = YAFFS_BLOCK_STATE_DEAD;
|
|
+ int seqnum = 0;
|
|
+ int retval;
|
|
+
|
|
+ /* We don't yet have a good place to test for MTD config prerequists.
|
|
+ * Do it here as we are called during the initial scan.
|
|
+ */
|
|
+ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
|
|
+ if (etags.blockBad) {
|
|
+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
|
|
+ "block %d is marked bad", blockNo);
|
|
+ state = YAFFS_BLOCK_STATE_DEAD;
|
|
+ }
|
|
+ else if (etags.chunkUsed) {
|
|
+ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
|
+ seqnum = etags.sequenceNumber;
|
|
+ }
|
|
+ else {
|
|
+ state = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ }
|
|
+
|
|
+ *pState = state;
|
|
+ *pSequenceNumber = seqnum;
|
|
+
|
|
+ /* query always succeeds */
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+#endif /*KERNEL_VERSION*/
|
|
+
|
|
+--Boundary-00=_5LbTGmt62YoutxM--
|
|
+
|
|
+
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,363 @@
|
|
+/*
|
|
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
|
|
+ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
|
|
+ *
|
|
+ * Copyright (C) 2002 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * This module provides the interface between yaffs_nand.c and the
|
|
+ * MTD API. This version is used when the MTD interface supports the
|
|
+ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
|
|
+ * and we have small-page NAND device.
|
|
+ *
|
|
+ * These functions are invoked via function pointers in yaffs_nand.c.
|
|
+ * This replaces functionality provided by functions in yaffs_mtdif.c
|
|
+ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
|
|
+ * called in yaffs_mtdif.c when the function pointers are NULL.
|
|
+ * We assume the MTD layer is performing ECC (useNANDECC is true).
|
|
+ */
|
|
+
|
|
+#include "yportenv.h"
|
|
+#include "yaffs_guts.h"
|
|
+#include "yaffs_packedtags1.h"
|
|
+#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
|
|
+
|
|
+#include "linux/kernel.h"
|
|
+#include "linux/version.h"
|
|
+#include "linux/types.h"
|
|
+#include "linux/mtd/mtd.h"
|
|
+
|
|
+/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+
|
|
+const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $";
|
|
+
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+# define YTAG1_SIZE 8
|
|
+#else
|
|
+# define YTAG1_SIZE 9
|
|
+#endif
|
|
+
|
|
+#if 0
|
|
+/* Use the following nand_ecclayout with MTD when using
|
|
+ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
|
|
+ * If you have existing Yaffs images and the byte order differs from this,
|
|
+ * adjust 'oobfree' to match your existing Yaffs data.
|
|
+ *
|
|
+ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
|
|
+ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
|
|
+ * the 9th byte.
|
|
+ *
|
|
+ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
|
|
+ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
|
|
+ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
|
|
+ * byte and B is the small-page bad-block indicator byte.
|
|
+ */
|
|
+static struct nand_ecclayout nand_oob_16 = {
|
|
+ .eccbytes = 6,
|
|
+ .eccpos = { 8, 9, 10, 13, 14, 15 },
|
|
+ .oobavail = 9,
|
|
+ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
|
|
+};
|
|
+#endif
|
|
+
|
|
+/* Write a chunk (page) of data to NAND.
|
|
+ *
|
|
+ * Caller always provides ExtendedTags data which are converted to a more
|
|
+ * compact (packed) form for storage in NAND. A mini-ECC runs over the
|
|
+ * contents of the tags meta-data; used to valid the tags when read.
|
|
+ *
|
|
+ * - Pack ExtendedTags to PackedTags1 form
|
|
+ * - Compute mini-ECC for PackedTags1
|
|
+ * - Write data and packed tags to NAND.
|
|
+ *
|
|
+ * Note: Due to the use of the PackedTags1 meta-data which does not include
|
|
+ * a full sequence number (as found in the larger PackedTags2 form) it is
|
|
+ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
|
|
+ * discarded and dirty. This is not ideal: newer NAND parts are supposed
|
|
+ * to be written just once. When Yaffs performs this operation, this
|
|
+ * function is called with a NULL data pointer -- calling MTD write_oob
|
|
+ * without data is valid usage (2.6.17).
|
|
+ *
|
|
+ * Any underlying MTD error results in YAFFS_FAIL.
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
|
|
+ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int chunkBytes = dev->nDataBytesPerChunk;
|
|
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
|
|
+ struct mtd_oob_ops ops;
|
|
+ yaffs_PackedTags1 pt1;
|
|
+ int retval;
|
|
+
|
|
+ /* we assume that PackedTags1 and yaffs_Tags are compatible */
|
|
+ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
|
|
+ compile_time_assertion(sizeof(yaffs_Tags) == 8);
|
|
+
|
|
+ dev->nPageWrites++;
|
|
+
|
|
+ yaffs_PackTags1(&pt1, etags);
|
|
+ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
|
|
+
|
|
+ /* When deleting a chunk, the upper layer provides only skeletal
|
|
+ * etags, one with chunkDeleted set. However, we need to update the
|
|
+ * tags, not erase them completely. So we use the NAND write property
|
|
+ * that only zeroed-bits stick and set tag bytes to all-ones and
|
|
+ * zero just the (not) deleted bit.
|
|
+ */
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+ if (etags->chunkDeleted) {
|
|
+ memset(&pt1, 0xff, 8);
|
|
+ /* clear delete status bit to indicate deleted */
|
|
+ pt1.deleted = 0;
|
|
+ }
|
|
+#else
|
|
+ ((__u8 *)&pt1)[8] = 0xff;
|
|
+ if (etags->chunkDeleted) {
|
|
+ memset(&pt1, 0xff, 8);
|
|
+ /* zero pageStatus byte to indicate deleted */
|
|
+ ((__u8 *)&pt1)[8] = 0;
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ memset(&ops, 0, sizeof(ops));
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.len = (data) ? chunkBytes : 0;
|
|
+ ops.ooblen = YTAG1_SIZE;
|
|
+ ops.datbuf = (__u8 *)data;
|
|
+ ops.oobbuf = (__u8 *)&pt1;
|
|
+
|
|
+ retval = mtd->write_oob(mtd, addr, &ops);
|
|
+ if (retval) {
|
|
+ yaffs_trace(YAFFS_TRACE_MTD,
|
|
+ "write_oob failed, chunk %d, mtd error %d\n",
|
|
+ chunkInNAND, retval);
|
|
+ }
|
|
+ return retval ? YAFFS_FAIL : YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Return with empty ExtendedTags but add eccResult.
|
|
+ */
|
|
+static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
|
|
+{
|
|
+ if (etags) {
|
|
+ memset(etags, 0, sizeof(*etags));
|
|
+ etags->eccResult = eccResult;
|
|
+ }
|
|
+ return retval;
|
|
+}
|
|
+
|
|
+/* Read a chunk (page) from NAND.
|
|
+ *
|
|
+ * Caller expects ExtendedTags data to be usable even on error; that is,
|
|
+ * all members except eccResult and blockBad are zeroed.
|
|
+ *
|
|
+ * - Check ECC results for data (if applicable)
|
|
+ * - Check for blank/erased block (return empty ExtendedTags if blank)
|
|
+ * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
|
|
+ * - Convert PackedTags1 to ExtendedTags
|
|
+ * - Update eccResult and blockBad members to refect state.
|
|
+ *
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
|
|
+ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int chunkBytes = dev->nDataBytesPerChunk;
|
|
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
|
|
+ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+ struct mtd_oob_ops ops;
|
|
+ yaffs_PackedTags1 pt1;
|
|
+ int retval;
|
|
+ int deleted;
|
|
+
|
|
+ dev->nPageReads++;
|
|
+
|
|
+ memset(&ops, 0, sizeof(ops));
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.len = (data) ? chunkBytes : 0;
|
|
+ ops.ooblen = YTAG1_SIZE;
|
|
+ ops.datbuf = data;
|
|
+ ops.oobbuf = (__u8 *)&pt1;
|
|
+
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
|
|
+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
|
|
+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
|
|
+ */
|
|
+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
|
|
+#endif
|
|
+ /* Read page and oob using MTD.
|
|
+ * Check status and determine ECC result.
|
|
+ */
|
|
+ retval = mtd->read_oob(mtd, addr, &ops);
|
|
+ if (retval) {
|
|
+ yaffs_trace(YAFFS_TRACE_MTD,
|
|
+ "read_oob failed, chunk %d, mtd error %d\n",
|
|
+ chunkInNAND, retval);
|
|
+ }
|
|
+
|
|
+ switch (retval) {
|
|
+ case 0:
|
|
+ /* no error */
|
|
+ break;
|
|
+
|
|
+ case -EUCLEAN:
|
|
+ /* MTD's ECC fixed the data */
|
|
+ eccres = YAFFS_ECC_RESULT_FIXED;
|
|
+ dev->eccFixed++;
|
|
+ break;
|
|
+
|
|
+ case -EBADMSG:
|
|
+ /* MTD's ECC could not fix the data */
|
|
+ dev->eccUnfixed++;
|
|
+ /* fall into... */
|
|
+ default:
|
|
+ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
|
|
+ etags->blockBad = (mtd->block_isbad)(mtd, addr);
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ /* Check for a blank/erased chunk.
|
|
+ */
|
|
+ if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
|
|
+ /* when blank, upper layers want eccResult to be <= NO_ERROR */
|
|
+ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
|
|
+ }
|
|
+
|
|
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
|
|
+ /* Read deleted status (bit) then return it to it's non-deleted
|
|
+ * state before performing tags mini-ECC check. pt1.deleted is
|
|
+ * inverted.
|
|
+ */
|
|
+ deleted = !pt1.deleted;
|
|
+ pt1.deleted = 1;
|
|
+#else
|
|
+ deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
|
|
+#endif
|
|
+
|
|
+ /* Check the packed tags mini-ECC and correct if necessary/possible.
|
|
+ */
|
|
+ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
|
|
+ switch (retval) {
|
|
+ case 0:
|
|
+ /* no tags error, use MTD result */
|
|
+ break;
|
|
+ case 1:
|
|
+ /* recovered tags-ECC error */
|
|
+ dev->tagsEccFixed++;
|
|
+ if (eccres == YAFFS_ECC_RESULT_NO_ERROR)
|
|
+ eccres = YAFFS_ECC_RESULT_FIXED;
|
|
+ break;
|
|
+ default:
|
|
+ /* unrecovered tags-ECC error */
|
|
+ dev->tagsEccUnfixed++;
|
|
+ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
|
|
+ }
|
|
+
|
|
+ /* Unpack the tags to extended form and set ECC result.
|
|
+ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
|
|
+ */
|
|
+ pt1.shouldBeFF = 0xFFFFFFFF;
|
|
+ yaffs_UnpackTags1(etags, &pt1);
|
|
+ etags->eccResult = eccres;
|
|
+
|
|
+ /* Set deleted state */
|
|
+ etags->chunkDeleted = deleted;
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Mark a block bad.
|
|
+ *
|
|
+ * This is a persistant state.
|
|
+ * Use of this function should be rare.
|
|
+ *
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
|
|
+ int retval;
|
|
+
|
|
+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
|
|
+
|
|
+ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
|
|
+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Check any MTD prerequists.
|
|
+ *
|
|
+ * Returns YAFFS_OK or YAFFS_FAIL.
|
|
+ */
|
|
+static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
|
|
+{
|
|
+ /* 2.6.18 has mtd->ecclayout->oobavail */
|
|
+ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
|
|
+ int oobavail = mtd->ecclayout->oobavail;
|
|
+
|
|
+ if (oobavail < YTAG1_SIZE) {
|
|
+ yaffs_trace(YAFFS_TRACE_ERROR,
|
|
+ "mtd device has only %d bytes for tags, need %d\n",
|
|
+ oobavail, YTAG1_SIZE);
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+/* Query for the current state of a specific block.
|
|
+ *
|
|
+ * Examine the tags of the first chunk of the block and return the state:
|
|
+ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
|
|
+ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
|
|
+ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
|
|
+ *
|
|
+ * Always returns YAFFS_OK.
|
|
+ */
|
|
+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
|
+ yaffs_BlockState * pState, int *pSequenceNumber)
|
|
+{
|
|
+ struct mtd_info * mtd = dev->genericDevice;
|
|
+ int chunkNo = blockNo * dev->nChunksPerBlock;
|
|
+ yaffs_ExtendedTags etags;
|
|
+ int state = YAFFS_BLOCK_STATE_DEAD;
|
|
+ int seqnum = 0;
|
|
+ int retval;
|
|
+
|
|
+ /* We don't yet have a good place to test for MTD config prerequists.
|
|
+ * Do it here as we are called during the initial scan.
|
|
+ */
|
|
+ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
|
|
+ if (etags.blockBad) {
|
|
+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
|
|
+ "block %d is marked bad", blockNo);
|
|
+ state = YAFFS_BLOCK_STATE_DEAD;
|
|
+ }
|
|
+ else if (etags.chunkUsed) {
|
|
+ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
|
+ seqnum = etags.sequenceNumber;
|
|
+ }
|
|
+ else {
|
|
+ state = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ }
|
|
+
|
|
+ *pState = state;
|
|
+ *pSequenceNumber = seqnum;
|
|
+
|
|
+ /* query always succeeds */
|
|
+ return YAFFS_OK;
|
|
+}
|
|
+
|
|
+#endif /*KERNEL_VERSION*/
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,28 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_MTDIF1_H__
|
|
+#define __YAFFS_MTDIF1_H__
|
|
+
|
|
+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data, const yaffs_ExtendedTags * tags);
|
|
+
|
|
+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ __u8 * data, yaffs_ExtendedTags * tags);
|
|
+
|
|
+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
|
|
+
|
|
+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
|
+ yaffs_BlockState * state, int *sequenceNumber);
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,232 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+/* mtd interface for YAFFS2 */
|
|
+
|
|
+const char *yaffs_mtdif2_c_version =
|
|
+ "$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
|
|
+
|
|
+#include "yportenv.h"
|
|
+
|
|
+
|
|
+#include "yaffs_mtdif2.h"
|
|
+
|
|
+#include "linux/mtd/mtd.h"
|
|
+#include "linux/types.h"
|
|
+#include "linux/time.h"
|
|
+
|
|
+#include "yaffs_packedtags2.h"
|
|
+
|
|
+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ struct mtd_oob_ops ops;
|
|
+#else
|
|
+ size_t dummy;
|
|
+#endif
|
|
+ int retval = 0;
|
|
+
|
|
+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
|
+
|
|
+ yaffs_PackedTags2 pt;
|
|
+
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR
|
|
+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
|
|
+ TENDSTR), chunkInNAND, data, tags));
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ if (tags)
|
|
+ yaffs_PackTags2(&pt, tags);
|
|
+ else
|
|
+ BUG(); /* both tags and data should always be present */
|
|
+
|
|
+ if (data) {
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.ooblen = sizeof(pt);
|
|
+ ops.len = dev->nDataBytesPerChunk;
|
|
+ ops.ooboffs = 0;
|
|
+ ops.datbuf = (__u8 *)data;
|
|
+ ops.oobbuf = (void *)&pt;
|
|
+ retval = mtd->write_oob(mtd, addr, &ops);
|
|
+ } else
|
|
+ BUG(); /* both tags and data should always be present */
|
|
+#else
|
|
+ if (tags) {
|
|
+ yaffs_PackTags2(&pt, tags);
|
|
+ }
|
|
+
|
|
+ if (data && tags) {
|
|
+ if (dev->useNANDECC)
|
|
+ retval =
|
|
+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, (__u8 *) & pt, NULL);
|
|
+ else
|
|
+ retval =
|
|
+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, (__u8 *) & pt, NULL);
|
|
+ } else {
|
|
+ if (data)
|
|
+ retval =
|
|
+ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
|
+ data);
|
|
+ if (tags)
|
|
+ retval =
|
|
+ mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
|
|
+ (__u8 *) & pt);
|
|
+
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ __u8 * data, yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ struct mtd_oob_ops ops;
|
|
+#endif
|
|
+ size_t dummy;
|
|
+ int retval = 0;
|
|
+
|
|
+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
|
+
|
|
+ yaffs_PackedTags2 pt;
|
|
+
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR
|
|
+ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
|
|
+ TENDSTR), chunkInNAND, data, tags));
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
|
+ if (data && !tags)
|
|
+ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data);
|
|
+ else if (tags) {
|
|
+ ops.mode = MTD_OOB_AUTO;
|
|
+ ops.ooblen = sizeof(pt);
|
|
+ ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
|
|
+ ops.ooboffs = 0;
|
|
+ ops.datbuf = data;
|
|
+ ops.oobbuf = dev->spareBuffer;
|
|
+ retval = mtd->read_oob(mtd, addr, &ops);
|
|
+ }
|
|
+#else
|
|
+ if (data && tags) {
|
|
+ if (dev->useNANDECC) {
|
|
+ retval =
|
|
+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, dev->spareBuffer,
|
|
+ NULL);
|
|
+ } else {
|
|
+ retval =
|
|
+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
|
+ &dummy, data, dev->spareBuffer,
|
|
+ NULL);
|
|
+ }
|
|
+ } else {
|
|
+ if (data)
|
|
+ retval =
|
|
+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
|
+ data);
|
|
+ if (tags)
|
|
+ retval =
|
|
+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
|
|
+ dev->spareBuffer);
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ memcpy(&pt, dev->spareBuffer, sizeof(pt));
|
|
+
|
|
+ if (tags)
|
|
+ yaffs_UnpackTags2(tags, &pt);
|
|
+
|
|
+ if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
|
|
+ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+ int retval;
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
|
|
+
|
|
+ retval =
|
|
+ mtd->block_markbad(mtd,
|
|
+ blockNo * dev->nChunksPerBlock *
|
|
+ dev->nDataBytesPerChunk);
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+}
|
|
+
|
|
+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
|
+ yaffs_BlockState * state, int *sequenceNumber)
|
|
+{
|
|
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
|
+ int retval;
|
|
+
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
|
|
+ retval =
|
|
+ mtd->block_isbad(mtd,
|
|
+ blockNo * dev->nChunksPerBlock *
|
|
+ dev->nDataBytesPerChunk);
|
|
+
|
|
+ if (retval) {
|
|
+ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
|
|
+
|
|
+ *state = YAFFS_BLOCK_STATE_DEAD;
|
|
+ *sequenceNumber = 0;
|
|
+ } else {
|
|
+ yaffs_ExtendedTags t;
|
|
+ nandmtd2_ReadChunkWithTagsFromNAND(dev,
|
|
+ blockNo *
|
|
+ dev->nChunksPerBlock, NULL,
|
|
+ &t);
|
|
+
|
|
+ if (t.chunkUsed) {
|
|
+ *sequenceNumber = t.sequenceNumber;
|
|
+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
|
+ } else {
|
|
+ *sequenceNumber = 0;
|
|
+ *state = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ }
|
|
+ }
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
|
|
+ *state));
|
|
+
|
|
+ if (retval == 0)
|
|
+ return YAFFS_OK;
|
|
+ else
|
|
+ return YAFFS_FAIL;
|
|
+}
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,29 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_MTDIF2_H__
|
|
+#define __YAFFS_MTDIF2_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_ExtendedTags * tags);
|
|
+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ __u8 * data, yaffs_ExtendedTags * tags);
|
|
+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
|
|
+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
|
+ yaffs_BlockState * state, int *sequenceNumber);
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nand.c linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,134 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+const char *yaffs_nand_c_version =
|
|
+ "$Id: yaffs_nand.c,v 1.7 2007-02-14 01:09:06 wookey Exp $";
|
|
+
|
|
+#include "yaffs_nand.h"
|
|
+#include "yaffs_tagscompat.h"
|
|
+#include "yaffs_tagsvalidity.h"
|
|
+
|
|
+
|
|
+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ __u8 * buffer,
|
|
+ yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ int result;
|
|
+ yaffs_ExtendedTags localTags;
|
|
+
|
|
+ int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
|
|
+
|
|
+ /* If there are no tags provided, use local tags to get prioritised gc working */
|
|
+ if(!tags)
|
|
+ tags = &localTags;
|
|
+
|
|
+ if (dev->readChunkWithTagsFromNAND)
|
|
+ result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
|
|
+ tags);
|
|
+ else
|
|
+ result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
|
|
+ realignedChunkInNAND,
|
|
+ buffer,
|
|
+ tags);
|
|
+ if(tags &&
|
|
+ tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
|
|
+
|
|
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
|
|
+ yaffs_HandleChunkError(dev,bi);
|
|
+ }
|
|
+
|
|
+ return result;
|
|
+}
|
|
+
|
|
+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
|
|
+ int chunkInNAND,
|
|
+ const __u8 * buffer,
|
|
+ yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ chunkInNAND -= dev->chunkOffset;
|
|
+
|
|
+
|
|
+ if (tags) {
|
|
+ tags->sequenceNumber = dev->sequenceNumber;
|
|
+ tags->chunkUsed = 1;
|
|
+ if (!yaffs_ValidateTags(tags)) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("Writing uninitialised tags" TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+ T(YAFFS_TRACE_WRITE,
|
|
+ (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
|
|
+ tags->objectId, tags->chunkId));
|
|
+ } else {
|
|
+ T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
|
|
+ YBUG();
|
|
+ }
|
|
+
|
|
+ if (dev->writeChunkWithTagsToNAND)
|
|
+ return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
|
|
+ tags);
|
|
+ else
|
|
+ return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
|
|
+ chunkInNAND,
|
|
+ buffer,
|
|
+ tags);
|
|
+}
|
|
+
|
|
+int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
|
|
+{
|
|
+ blockNo -= dev->blockOffset;
|
|
+
|
|
+;
|
|
+ if (dev->markNANDBlockBad)
|
|
+ return dev->markNANDBlockBad(dev, blockNo);
|
|
+ else
|
|
+ return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
|
|
+}
|
|
+
|
|
+int yaffs_QueryInitialBlockState(yaffs_Device * dev,
|
|
+ int blockNo,
|
|
+ yaffs_BlockState * state,
|
|
+ unsigned *sequenceNumber)
|
|
+{
|
|
+ blockNo -= dev->blockOffset;
|
|
+
|
|
+ if (dev->queryNANDBlock)
|
|
+ return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
|
|
+ else
|
|
+ return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
|
|
+ state,
|
|
+ sequenceNumber);
|
|
+}
|
|
+
|
|
+
|
|
+int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int blockInNAND)
|
|
+{
|
|
+ int result;
|
|
+
|
|
+ blockInNAND -= dev->blockOffset;
|
|
+
|
|
+
|
|
+ dev->nBlockErasures++;
|
|
+ result = dev->eraseBlockInNAND(dev, blockInNAND);
|
|
+
|
|
+ return result;
|
|
+}
|
|
+
|
|
+int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
|
|
+{
|
|
+ return dev->initialiseNAND(dev);
|
|
+}
|
|
+
|
|
+
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nand.h linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,44 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_NAND_H__
|
|
+#define __YAFFS_NAND_H__
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+
|
|
+
|
|
+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
|
+ __u8 * buffer,
|
|
+ yaffs_ExtendedTags * tags);
|
|
+
|
|
+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
|
|
+ int chunkInNAND,
|
|
+ const __u8 * buffer,
|
|
+ yaffs_ExtendedTags * tags);
|
|
+
|
|
+int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
|
|
+
|
|
+int yaffs_QueryInitialBlockState(yaffs_Device * dev,
|
|
+ int blockNo,
|
|
+ yaffs_BlockState * state,
|
|
+ unsigned *sequenceNumber);
|
|
+
|
|
+int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int blockInNAND);
|
|
+
|
|
+int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev);
|
|
+
|
|
+#endif
|
|
+
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nandemul2k.h linux-2.6.21.1.new/fs/yaffs2/yaffs_nandemul2k.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_nandemul2k.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nandemul2k.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,39 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+/* Interface to emulated NAND functions (2k page size) */
|
|
+
|
|
+#ifndef __YAFFS_NANDEMUL2K_H__
|
|
+#define __YAFFS_NANDEMUL2K_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int chunkInNAND, const __u8 * data,
|
|
+ yaffs_ExtendedTags * tags);
|
|
+int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int chunkInNAND, __u8 * data,
|
|
+ yaffs_ExtendedTags * tags);
|
|
+int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
|
|
+int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
|
+ yaffs_BlockState * state, int *sequenceNumber);
|
|
+int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int blockInNAND);
|
|
+int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev);
|
|
+int nandemul2k_GetBytesPerChunk(void);
|
|
+int nandemul2k_GetChunksPerBlock(void);
|
|
+int nandemul2k_GetNumberOfBlocks(void);
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.c linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.c 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,52 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include "yaffs_packedtags1.h"
|
|
+#include "yportenv.h"
|
|
+
|
|
+void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t)
|
|
+{
|
|
+ pt->chunkId = t->chunkId;
|
|
+ pt->serialNumber = t->serialNumber;
|
|
+ pt->byteCount = t->byteCount;
|
|
+ pt->objectId = t->objectId;
|
|
+ pt->ecc = 0;
|
|
+ pt->deleted = (t->chunkDeleted) ? 0 : 1;
|
|
+ pt->unusedStuff = 0;
|
|
+ pt->shouldBeFF = 0xFFFFFFFF;
|
|
+
|
|
+}
|
|
+
|
|
+void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt)
|
|
+{
|
|
+ static const __u8 allFF[] =
|
|
+ { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
|
+0xff };
|
|
+
|
|
+ if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) {
|
|
+ t->blockBad = 0;
|
|
+ if (pt->shouldBeFF != 0xFFFFFFFF) {
|
|
+ t->blockBad = 1;
|
|
+ }
|
|
+ t->chunkUsed = 1;
|
|
+ t->objectId = pt->objectId;
|
|
+ t->chunkId = pt->chunkId;
|
|
+ t->byteCount = pt->byteCount;
|
|
+ t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+ t->chunkDeleted = (pt->deleted) ? 0 : 1;
|
|
+ t->serialNumber = pt->serialNumber;
|
|
+ } else {
|
|
+ memset(t, 0, sizeof(yaffs_ExtendedTags));
|
|
+
|
|
+ }
|
|
+}
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.h linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.h 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,37 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
|
|
+
|
|
+#ifndef __YAFFS_PACKEDTAGS1_H__
|
|
+#define __YAFFS_PACKEDTAGS1_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+typedef struct {
|
|
+ unsigned chunkId:20;
|
|
+ unsigned serialNumber:2;
|
|
+ unsigned byteCount:10;
|
|
+ unsigned objectId:18;
|
|
+ unsigned ecc:12;
|
|
+ unsigned deleted:1;
|
|
+ unsigned unusedStuff:1;
|
|
+ unsigned shouldBeFF;
|
|
+
|
|
+} yaffs_PackedTags1;
|
|
+
|
|
+void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t);
|
|
+void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt);
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.c linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.c 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,182 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include "yaffs_packedtags2.h"
|
|
+#include "yportenv.h"
|
|
+#include "yaffs_tagsvalidity.h"
|
|
+
|
|
+/* This code packs a set of extended tags into a binary structure for
|
|
+ * NAND storage
|
|
+ */
|
|
+
|
|
+/* Some of the information is "extra" struff which can be packed in to
|
|
+ * speed scanning
|
|
+ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
|
|
+ */
|
|
+
|
|
+/* Extra flags applied to chunkId */
|
|
+
|
|
+#define EXTRA_HEADER_INFO_FLAG 0x80000000
|
|
+#define EXTRA_SHRINK_FLAG 0x40000000
|
|
+#define EXTRA_SHADOWS_FLAG 0x20000000
|
|
+#define EXTRA_SPARE_FLAGS 0x10000000
|
|
+
|
|
+#define ALL_EXTRA_FLAGS 0xF0000000
|
|
+
|
|
+/* Also, the top 4 bits of the object Id are set to the object type. */
|
|
+#define EXTRA_OBJECT_TYPE_SHIFT (28)
|
|
+#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT)
|
|
+
|
|
+static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 * pt)
|
|
+{
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
|
|
+ pt->t.objectId, pt->t.chunkId, pt->t.byteCount,
|
|
+ pt->t.sequenceNumber));
|
|
+}
|
|
+
|
|
+static void yaffs_DumpTags2(const yaffs_ExtendedTags * t)
|
|
+{
|
|
+ T(YAFFS_TRACE_MTD,
|
|
+ (TSTR
|
|
+ ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte "
|
|
+ "%d del %d ser %d seq %d"
|
|
+ TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId,
|
|
+ t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber,
|
|
+ t->sequenceNumber));
|
|
+
|
|
+}
|
|
+
|
|
+void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t)
|
|
+{
|
|
+ pt->t.chunkId = t->chunkId;
|
|
+ pt->t.sequenceNumber = t->sequenceNumber;
|
|
+ pt->t.byteCount = t->byteCount;
|
|
+ pt->t.objectId = t->objectId;
|
|
+
|
|
+ if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
|
|
+ /* Store the extra header info instead */
|
|
+ /* We save the parent object in the chunkId */
|
|
+ pt->t.chunkId = EXTRA_HEADER_INFO_FLAG
|
|
+ | t->extraParentObjectId;
|
|
+ if (t->extraIsShrinkHeader) {
|
|
+ pt->t.chunkId |= EXTRA_SHRINK_FLAG;
|
|
+ }
|
|
+ if (t->extraShadows) {
|
|
+ pt->t.chunkId |= EXTRA_SHADOWS_FLAG;
|
|
+ }
|
|
+
|
|
+ pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK;
|
|
+ pt->t.objectId |=
|
|
+ (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
|
|
+
|
|
+ if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
+ pt->t.byteCount = t->extraEquivalentObjectId;
|
|
+ } else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) {
|
|
+ pt->t.byteCount = t->extraFileLength;
|
|
+ } else {
|
|
+ pt->t.byteCount = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_DumpPackedTags2(pt);
|
|
+ yaffs_DumpTags2(t);
|
|
+
|
|
+#ifndef YAFFS_IGNORE_TAGS_ECC
|
|
+ {
|
|
+ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
|
|
+ sizeof(yaffs_PackedTags2TagsPart),
|
|
+ &pt->ecc);
|
|
+ }
|
|
+#endif
|
|
+}
|
|
+
|
|
+void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt)
|
|
+{
|
|
+
|
|
+ memset(t, 0, sizeof(yaffs_ExtendedTags));
|
|
+
|
|
+ yaffs_InitialiseTags(t);
|
|
+
|
|
+ if (pt->t.sequenceNumber != 0xFFFFFFFF) {
|
|
+ /* Page is in use */
|
|
+#ifdef YAFFS_IGNORE_TAGS_ECC
|
|
+ {
|
|
+ t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+ }
|
|
+#else
|
|
+ {
|
|
+ yaffs_ECCOther ecc;
|
|
+ int result;
|
|
+ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
|
|
+ sizeof
|
|
+ (yaffs_PackedTags2TagsPart),
|
|
+ &ecc);
|
|
+ result =
|
|
+ yaffs_ECCCorrectOther((unsigned char *)&pt->t,
|
|
+ sizeof
|
|
+ (yaffs_PackedTags2TagsPart),
|
|
+ &pt->ecc, &ecc);
|
|
+ switch(result){
|
|
+ case 0:
|
|
+ t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+ break;
|
|
+ case 1:
|
|
+ t->eccResult = YAFFS_ECC_RESULT_FIXED;
|
|
+ break;
|
|
+ case -1:
|
|
+ t->eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
|
+ break;
|
|
+ default:
|
|
+ t->eccResult = YAFFS_ECC_RESULT_UNKNOWN;
|
|
+ }
|
|
+ }
|
|
+#endif
|
|
+ t->blockBad = 0;
|
|
+ t->chunkUsed = 1;
|
|
+ t->objectId = pt->t.objectId;
|
|
+ t->chunkId = pt->t.chunkId;
|
|
+ t->byteCount = pt->t.byteCount;
|
|
+ t->chunkDeleted = 0;
|
|
+ t->serialNumber = 0;
|
|
+ t->sequenceNumber = pt->t.sequenceNumber;
|
|
+
|
|
+ /* Do extra header info stuff */
|
|
+
|
|
+ if (pt->t.chunkId & EXTRA_HEADER_INFO_FLAG) {
|
|
+ t->chunkId = 0;
|
|
+ t->byteCount = 0;
|
|
+
|
|
+ t->extraHeaderInfoAvailable = 1;
|
|
+ t->extraParentObjectId =
|
|
+ pt->t.chunkId & (~(ALL_EXTRA_FLAGS));
|
|
+ t->extraIsShrinkHeader =
|
|
+ (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
|
|
+ t->extraShadows =
|
|
+ (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
|
|
+ t->extraObjectType =
|
|
+ pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT;
|
|
+ t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
|
|
+
|
|
+ if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
+ t->extraEquivalentObjectId = pt->t.byteCount;
|
|
+ } else {
|
|
+ t->extraFileLength = pt->t.byteCount;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ yaffs_DumpPackedTags2(pt);
|
|
+ yaffs_DumpTags2(t);
|
|
+
|
|
+}
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.h linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.h 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,38 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
|
|
+
|
|
+#ifndef __YAFFS_PACKEDTAGS2_H__
|
|
+#define __YAFFS_PACKEDTAGS2_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+#include "yaffs_ecc.h"
|
|
+
|
|
+typedef struct {
|
|
+ unsigned sequenceNumber;
|
|
+ unsigned objectId;
|
|
+ unsigned chunkId;
|
|
+ unsigned byteCount;
|
|
+} yaffs_PackedTags2TagsPart;
|
|
+
|
|
+typedef struct {
|
|
+ yaffs_PackedTags2TagsPart t;
|
|
+ yaffs_ECCOther ecc;
|
|
+} yaffs_PackedTags2;
|
|
+
|
|
+void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t);
|
|
+void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt);
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_qsort.c linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_qsort.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.c 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,160 @@
|
|
+/*
|
|
+ * Copyright (c) 1992, 1993
|
|
+ * The Regents of the University of California. All rights reserved.
|
|
+ *
|
|
+ * Redistribution and use in source and binary forms, with or without
|
|
+ * modification, are permitted provided that the following conditions
|
|
+ * are met:
|
|
+ * 1. Redistributions of source code must retain the above copyright
|
|
+ * notice, this list of conditions and the following disclaimer.
|
|
+ * 2. Redistributions in binary form must reproduce the above copyright
|
|
+ * notice, this list of conditions and the following disclaimer in the
|
|
+ * documentation and/or other materials provided with the distribution.
|
|
+ * 3. Neither the name of the University nor the names of its contributors
|
|
+ * may be used to endorse or promote products derived from this software
|
|
+ * without specific prior written permission.
|
|
+ *
|
|
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
+ * SUCH DAMAGE.
|
|
+ */
|
|
+
|
|
+#include "yportenv.h"
|
|
+//#include <linux/string.h>
|
|
+
|
|
+/*
|
|
+ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
|
|
+ */
|
|
+#define swapcode(TYPE, parmi, parmj, n) { \
|
|
+ long i = (n) / sizeof (TYPE); \
|
|
+ register TYPE *pi = (TYPE *) (parmi); \
|
|
+ register TYPE *pj = (TYPE *) (parmj); \
|
|
+ do { \
|
|
+ register TYPE t = *pi; \
|
|
+ *pi++ = *pj; \
|
|
+ *pj++ = t; \
|
|
+ } while (--i > 0); \
|
|
+}
|
|
+
|
|
+#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
|
|
+ es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
|
|
+
|
|
+static __inline void
|
|
+swapfunc(char *a, char *b, int n, int swaptype)
|
|
+{
|
|
+ if (swaptype <= 1)
|
|
+ swapcode(long, a, b, n)
|
|
+ else
|
|
+ swapcode(char, a, b, n)
|
|
+}
|
|
+
|
|
+#define swap(a, b) \
|
|
+ if (swaptype == 0) { \
|
|
+ long t = *(long *)(a); \
|
|
+ *(long *)(a) = *(long *)(b); \
|
|
+ *(long *)(b) = t; \
|
|
+ } else \
|
|
+ swapfunc(a, b, es, swaptype)
|
|
+
|
|
+#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype)
|
|
+
|
|
+static __inline char *
|
|
+med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *))
|
|
+{
|
|
+ return cmp(a, b) < 0 ?
|
|
+ (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
|
|
+ :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
|
|
+}
|
|
+
|
|
+#ifndef min
|
|
+#define min(a,b) (((a) < (b)) ? (a) : (b))
|
|
+#endif
|
|
+
|
|
+void
|
|
+yaffs_qsort(void *aa, size_t n, size_t es,
|
|
+ int (*cmp)(const void *, const void *))
|
|
+{
|
|
+ char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
|
|
+ int d, r, swaptype, swap_cnt;
|
|
+ register char *a = aa;
|
|
+
|
|
+loop: SWAPINIT(a, es);
|
|
+ swap_cnt = 0;
|
|
+ if (n < 7) {
|
|
+ for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
|
|
+ for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
|
|
+ pl -= es)
|
|
+ swap(pl, pl - es);
|
|
+ return;
|
|
+ }
|
|
+ pm = (char *)a + (n / 2) * es;
|
|
+ if (n > 7) {
|
|
+ pl = (char *)a;
|
|
+ pn = (char *)a + (n - 1) * es;
|
|
+ if (n > 40) {
|
|
+ d = (n / 8) * es;
|
|
+ pl = med3(pl, pl + d, pl + 2 * d, cmp);
|
|
+ pm = med3(pm - d, pm, pm + d, cmp);
|
|
+ pn = med3(pn - 2 * d, pn - d, pn, cmp);
|
|
+ }
|
|
+ pm = med3(pl, pm, pn, cmp);
|
|
+ }
|
|
+ swap(a, pm);
|
|
+ pa = pb = (char *)a + es;
|
|
+
|
|
+ pc = pd = (char *)a + (n - 1) * es;
|
|
+ for (;;) {
|
|
+ while (pb <= pc && (r = cmp(pb, a)) <= 0) {
|
|
+ if (r == 0) {
|
|
+ swap_cnt = 1;
|
|
+ swap(pa, pb);
|
|
+ pa += es;
|
|
+ }
|
|
+ pb += es;
|
|
+ }
|
|
+ while (pb <= pc && (r = cmp(pc, a)) >= 0) {
|
|
+ if (r == 0) {
|
|
+ swap_cnt = 1;
|
|
+ swap(pc, pd);
|
|
+ pd -= es;
|
|
+ }
|
|
+ pc -= es;
|
|
+ }
|
|
+ if (pb > pc)
|
|
+ break;
|
|
+ swap(pb, pc);
|
|
+ swap_cnt = 1;
|
|
+ pb += es;
|
|
+ pc -= es;
|
|
+ }
|
|
+ if (swap_cnt == 0) { /* Switch to insertion sort */
|
|
+ for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
|
|
+ for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
|
|
+ pl -= es)
|
|
+ swap(pl, pl - es);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ pn = (char *)a + n * es;
|
|
+ r = min(pa - (char *)a, pb - pa);
|
|
+ vecswap(a, pb - r, r);
|
|
+ r = min((long)(pd - pc), (long)(pn - pd - es));
|
|
+ vecswap(pb, pn - r, r);
|
|
+ if ((r = pb - pa) > es)
|
|
+ yaffs_qsort(a, r / es, es, cmp);
|
|
+ if ((r = pd - pc) > es) {
|
|
+ /* Iterate rather than recurse to save stack space */
|
|
+ a = pn - r;
|
|
+ n = r / es;
|
|
+ goto loop;
|
|
+ }
|
|
+/* yaffs_qsort(pn - r, r / es, es, cmp);*/
|
|
+}
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_qsort.h linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_qsort.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.h 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,23 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+
|
|
+#ifndef __YAFFS_QSORT_H__
|
|
+#define __YAFFS_QSORT_H__
|
|
+
|
|
+extern void yaffs_qsort (void *const base, size_t total_elems, size_t size,
|
|
+ int (*cmp)(const void *, const void *));
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.c linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.c 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,530 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+#include "yaffs_tagscompat.h"
|
|
+#include "yaffs_ecc.h"
|
|
+
|
|
+static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND);
|
|
+#ifdef NOTYET
|
|
+static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND);
|
|
+static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_Spare * spare);
|
|
+static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
|
|
+ const yaffs_Spare * spare);
|
|
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND);
|
|
+#endif
|
|
+
|
|
+static const char yaffs_countBitsTable[256] = {
|
|
+ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
|
|
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
+ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
|
|
+};
|
|
+
|
|
+int yaffs_CountBits(__u8 x)
|
|
+{
|
|
+ int retVal;
|
|
+ retVal = yaffs_countBitsTable[x];
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+/********** Tags ECC calculations *********/
|
|
+
|
|
+void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare)
|
|
+{
|
|
+ yaffs_ECCCalculate(data, spare->ecc1);
|
|
+ yaffs_ECCCalculate(&data[256], spare->ecc2);
|
|
+}
|
|
+
|
|
+void yaffs_CalcTagsECC(yaffs_Tags * tags)
|
|
+{
|
|
+ /* Calculate an ecc */
|
|
+
|
|
+ unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
|
|
+ unsigned i, j;
|
|
+ unsigned ecc = 0;
|
|
+ unsigned bit = 0;
|
|
+
|
|
+ tags->ecc = 0;
|
|
+
|
|
+ for (i = 0; i < 8; i++) {
|
|
+ for (j = 1; j & 0xff; j <<= 1) {
|
|
+ bit++;
|
|
+ if (b[i] & j) {
|
|
+ ecc ^= bit;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ tags->ecc = ecc;
|
|
+
|
|
+}
|
|
+
|
|
+int yaffs_CheckECCOnTags(yaffs_Tags * tags)
|
|
+{
|
|
+ unsigned ecc = tags->ecc;
|
|
+
|
|
+ yaffs_CalcTagsECC(tags);
|
|
+
|
|
+ ecc ^= tags->ecc;
|
|
+
|
|
+ if (ecc && ecc <= 64) {
|
|
+ /* TODO: Handle the failure better. Retire? */
|
|
+ unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
|
|
+
|
|
+ ecc--;
|
|
+
|
|
+ b[ecc / 8] ^= (1 << (ecc & 7));
|
|
+
|
|
+ /* Now recvalc the ecc */
|
|
+ yaffs_CalcTagsECC(tags);
|
|
+
|
|
+ return 1; /* recovered error */
|
|
+ } else if (ecc) {
|
|
+ /* Wierd ecc failure value */
|
|
+ /* TODO Need to do somethiong here */
|
|
+ return -1; /* unrecovered error */
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/********** Tags **********/
|
|
+
|
|
+static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr,
|
|
+ yaffs_Tags * tagsPtr)
|
|
+{
|
|
+ yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
|
|
+
|
|
+ yaffs_CalcTagsECC(tagsPtr);
|
|
+
|
|
+ sparePtr->tagByte0 = tu->asBytes[0];
|
|
+ sparePtr->tagByte1 = tu->asBytes[1];
|
|
+ sparePtr->tagByte2 = tu->asBytes[2];
|
|
+ sparePtr->tagByte3 = tu->asBytes[3];
|
|
+ sparePtr->tagByte4 = tu->asBytes[4];
|
|
+ sparePtr->tagByte5 = tu->asBytes[5];
|
|
+ sparePtr->tagByte6 = tu->asBytes[6];
|
|
+ sparePtr->tagByte7 = tu->asBytes[7];
|
|
+}
|
|
+
|
|
+static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
|
|
+ yaffs_Tags * tagsPtr)
|
|
+{
|
|
+ yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
|
|
+ int result;
|
|
+
|
|
+ tu->asBytes[0] = sparePtr->tagByte0;
|
|
+ tu->asBytes[1] = sparePtr->tagByte1;
|
|
+ tu->asBytes[2] = sparePtr->tagByte2;
|
|
+ tu->asBytes[3] = sparePtr->tagByte3;
|
|
+ tu->asBytes[4] = sparePtr->tagByte4;
|
|
+ tu->asBytes[5] = sparePtr->tagByte5;
|
|
+ tu->asBytes[6] = sparePtr->tagByte6;
|
|
+ tu->asBytes[7] = sparePtr->tagByte7;
|
|
+
|
|
+ result = yaffs_CheckECCOnTags(tagsPtr);
|
|
+ if (result > 0) {
|
|
+ dev->tagsEccFixed++;
|
|
+ } else if (result < 0) {
|
|
+ dev->tagsEccUnfixed++;
|
|
+ }
|
|
+}
|
|
+
|
|
+static void yaffs_SpareInitialise(yaffs_Spare * spare)
|
|
+{
|
|
+ memset(spare, 0xFF, sizeof(yaffs_Spare));
|
|
+}
|
|
+
|
|
+static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int chunkInNAND, const __u8 * data,
|
|
+ yaffs_Spare * spare)
|
|
+{
|
|
+ if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR("**>> yaffs chunk %d is not valid" TENDSTR),
|
|
+ chunkInNAND));
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+
|
|
+ dev->nPageWrites++;
|
|
+ return dev->writeChunkToNAND(dev, chunkInNAND, data, spare);
|
|
+}
|
|
+
|
|
+static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
|
|
+ int chunkInNAND,
|
|
+ __u8 * data,
|
|
+ yaffs_Spare * spare,
|
|
+ yaffs_ECCResult * eccResult,
|
|
+ int doErrorCorrection)
|
|
+{
|
|
+ int retVal;
|
|
+ yaffs_Spare localSpare;
|
|
+
|
|
+ dev->nPageReads++;
|
|
+
|
|
+ if (!spare && data) {
|
|
+ /* If we don't have a real spare, then we use a local one. */
|
|
+ /* Need this for the calculation of the ecc */
|
|
+ spare = &localSpare;
|
|
+ }
|
|
+
|
|
+ if (!dev->useNANDECC) {
|
|
+ retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare);
|
|
+ if (data && doErrorCorrection) {
|
|
+ /* Do ECC correction */
|
|
+ /* Todo handle any errors */
|
|
+ int eccResult1, eccResult2;
|
|
+ __u8 calcEcc[3];
|
|
+
|
|
+ yaffs_ECCCalculate(data, calcEcc);
|
|
+ eccResult1 =
|
|
+ yaffs_ECCCorrect(data, spare->ecc1, calcEcc);
|
|
+ yaffs_ECCCalculate(&data[256], calcEcc);
|
|
+ eccResult2 =
|
|
+ yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc);
|
|
+
|
|
+ if (eccResult1 > 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>yaffs ecc error fix performed on chunk %d:0"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ dev->eccFixed++;
|
|
+ } else if (eccResult1 < 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>yaffs ecc error unfixed on chunk %d:0"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ dev->eccUnfixed++;
|
|
+ }
|
|
+
|
|
+ if (eccResult2 > 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>yaffs ecc error fix performed on chunk %d:1"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ dev->eccFixed++;
|
|
+ } else if (eccResult2 < 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>yaffs ecc error unfixed on chunk %d:1"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ dev->eccUnfixed++;
|
|
+ }
|
|
+
|
|
+ if (eccResult1 || eccResult2) {
|
|
+ /* We had a data problem on this page */
|
|
+ yaffs_HandleReadDataError(dev, chunkInNAND);
|
|
+ }
|
|
+
|
|
+ if (eccResult1 < 0 || eccResult2 < 0)
|
|
+ *eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
|
+ else if (eccResult1 > 0 || eccResult2 > 0)
|
|
+ *eccResult = YAFFS_ECC_RESULT_FIXED;
|
|
+ else
|
|
+ *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+ }
|
|
+ } else {
|
|
+ /* Must allocate enough memory for spare+2*sizeof(int) */
|
|
+ /* for ecc results from device. */
|
|
+ struct yaffs_NANDSpare nspare;
|
|
+ retVal =
|
|
+ dev->readChunkFromNAND(dev, chunkInNAND, data,
|
|
+ (yaffs_Spare *) & nspare);
|
|
+ memcpy(spare, &nspare, sizeof(yaffs_Spare));
|
|
+ if (data && doErrorCorrection) {
|
|
+ if (nspare.eccres1 > 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>mtd ecc error fix performed on chunk %d:0"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ } else if (nspare.eccres1 < 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>mtd ecc error unfixed on chunk %d:0"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ }
|
|
+
|
|
+ if (nspare.eccres2 > 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>mtd ecc error fix performed on chunk %d:1"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ } else if (nspare.eccres2 < 0) {
|
|
+ T(YAFFS_TRACE_ERROR,
|
|
+ (TSTR
|
|
+ ("**>>mtd ecc error unfixed on chunk %d:1"
|
|
+ TENDSTR), chunkInNAND));
|
|
+ }
|
|
+
|
|
+ if (nspare.eccres1 || nspare.eccres2) {
|
|
+ /* We had a data problem on this page */
|
|
+ yaffs_HandleReadDataError(dev, chunkInNAND);
|
|
+ }
|
|
+
|
|
+ if (nspare.eccres1 < 0 || nspare.eccres2 < 0)
|
|
+ *eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
|
+ else if (nspare.eccres1 > 0 || nspare.eccres2 > 0)
|
|
+ *eccResult = YAFFS_ECC_RESULT_FIXED;
|
|
+ else
|
|
+ *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
|
+
|
|
+ }
|
|
+ }
|
|
+ return retVal;
|
|
+}
|
|
+
|
|
+#ifdef NOTYET
|
|
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
|
|
+ int chunkInNAND)
|
|
+{
|
|
+
|
|
+ static int init = 0;
|
|
+ static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
|
|
+ static __u8 data[YAFFS_BYTES_PER_CHUNK];
|
|
+ /* Might as well always allocate the larger size for */
|
|
+ /* dev->useNANDECC == true; */
|
|
+ static __u8 spare[sizeof(struct yaffs_NANDSpare)];
|
|
+
|
|
+ dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
|
|
+
|
|
+ if (!init) {
|
|
+ memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK);
|
|
+ init = 1;
|
|
+ }
|
|
+
|
|
+ if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK))
|
|
+ return YAFFS_FAIL;
|
|
+ if (memcmp(cmpbuf, spare, 16))
|
|
+ return YAFFS_FAIL;
|
|
+
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+#endif
|
|
+
|
|
+/*
|
|
+ * Functions for robustisizing
|
|
+ */
|
|
+
|
|
+static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND)
|
|
+{
|
|
+ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
|
|
+
|
|
+ /* Mark the block for retirement */
|
|
+ yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
|
|
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
|
|
+ (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND));
|
|
+
|
|
+ /* TODO:
|
|
+ * Just do a garbage collection on the affected block
|
|
+ * then retire the block
|
|
+ * NB recursion
|
|
+ */
|
|
+}
|
|
+
|
|
+#ifdef NOTYET
|
|
+static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND)
|
|
+{
|
|
+}
|
|
+
|
|
+static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_Spare * spare)
|
|
+{
|
|
+}
|
|
+
|
|
+static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
|
|
+ const yaffs_Spare * spare)
|
|
+{
|
|
+}
|
|
+
|
|
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
|
|
+{
|
|
+ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
|
|
+
|
|
+ /* Mark the block for retirement */
|
|
+ yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
|
|
+ /* Delete the chunk */
|
|
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
|
|
+}
|
|
+
|
|
+static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1,
|
|
+ const yaffs_Spare * s0, const yaffs_Spare * s1)
|
|
+{
|
|
+
|
|
+ if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 ||
|
|
+ s0->tagByte0 != s1->tagByte0 ||
|
|
+ s0->tagByte1 != s1->tagByte1 ||
|
|
+ s0->tagByte2 != s1->tagByte2 ||
|
|
+ s0->tagByte3 != s1->tagByte3 ||
|
|
+ s0->tagByte4 != s1->tagByte4 ||
|
|
+ s0->tagByte5 != s1->tagByte5 ||
|
|
+ s0->tagByte6 != s1->tagByte6 ||
|
|
+ s0->tagByte7 != s1->tagByte7 ||
|
|
+ s0->ecc1[0] != s1->ecc1[0] ||
|
|
+ s0->ecc1[1] != s1->ecc1[1] ||
|
|
+ s0->ecc1[2] != s1->ecc1[2] ||
|
|
+ s0->ecc2[0] != s1->ecc2[0] ||
|
|
+ s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) {
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+#endif /* NOTYET */
|
|
+
|
|
+int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
|
|
+ int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_ExtendedTags *
|
|
+ eTags)
|
|
+{
|
|
+ yaffs_Spare spare;
|
|
+ yaffs_Tags tags;
|
|
+
|
|
+ yaffs_SpareInitialise(&spare);
|
|
+
|
|
+ if (eTags->chunkDeleted) {
|
|
+ spare.pageStatus = 0;
|
|
+ } else {
|
|
+ tags.objectId = eTags->objectId;
|
|
+ tags.chunkId = eTags->chunkId;
|
|
+ tags.byteCount = eTags->byteCount;
|
|
+ tags.serialNumber = eTags->serialNumber;
|
|
+
|
|
+ if (!dev->useNANDECC && data) {
|
|
+ yaffs_CalcECC(data, &spare);
|
|
+ }
|
|
+ yaffs_LoadTagsIntoSpare(&spare, &tags);
|
|
+
|
|
+ }
|
|
+
|
|
+ return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare);
|
|
+}
|
|
+
|
|
+int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
|
|
+ int chunkInNAND,
|
|
+ __u8 * data,
|
|
+ yaffs_ExtendedTags * eTags)
|
|
+{
|
|
+
|
|
+ yaffs_Spare spare;
|
|
+ yaffs_Tags tags;
|
|
+ yaffs_ECCResult eccResult;
|
|
+
|
|
+ static yaffs_Spare spareFF;
|
|
+ static int init;
|
|
+
|
|
+ if (!init) {
|
|
+ memset(&spareFF, 0xFF, sizeof(spareFF));
|
|
+ init = 1;
|
|
+ }
|
|
+
|
|
+ if (yaffs_ReadChunkFromNAND
|
|
+ (dev, chunkInNAND, data, &spare, &eccResult, 1)) {
|
|
+ /* eTags may be NULL */
|
|
+ if (eTags) {
|
|
+
|
|
+ int deleted =
|
|
+ (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
|
|
+
|
|
+ eTags->chunkDeleted = deleted;
|
|
+ eTags->eccResult = eccResult;
|
|
+ eTags->blockBad = 0; /* We're reading it */
|
|
+ /* therefore it is not a bad block */
|
|
+ eTags->chunkUsed =
|
|
+ (memcmp(&spareFF, &spare, sizeof(spareFF)) !=
|
|
+ 0) ? 1 : 0;
|
|
+
|
|
+ if (eTags->chunkUsed) {
|
|
+ yaffs_GetTagsFromSpare(dev, &spare, &tags);
|
|
+
|
|
+ eTags->objectId = tags.objectId;
|
|
+ eTags->chunkId = tags.chunkId;
|
|
+ eTags->byteCount = tags.byteCount;
|
|
+ eTags->serialNumber = tags.serialNumber;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return YAFFS_OK;
|
|
+ } else {
|
|
+ return YAFFS_FAIL;
|
|
+ }
|
|
+}
|
|
+
|
|
+int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
|
|
+ int blockInNAND)
|
|
+{
|
|
+
|
|
+ yaffs_Spare spare;
|
|
+
|
|
+ memset(&spare, 0xff, sizeof(yaffs_Spare));
|
|
+
|
|
+ spare.blockStatus = 'Y';
|
|
+
|
|
+ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
|
|
+ &spare);
|
|
+ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
|
|
+ NULL, &spare);
|
|
+
|
|
+ return YAFFS_OK;
|
|
+
|
|
+}
|
|
+
|
|
+int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
|
|
+ int blockNo, yaffs_BlockState *
|
|
+ state,
|
|
+ int *sequenceNumber)
|
|
+{
|
|
+
|
|
+ yaffs_Spare spare0, spare1;
|
|
+ static yaffs_Spare spareFF;
|
|
+ static int init;
|
|
+ yaffs_ECCResult dummy;
|
|
+
|
|
+ if (!init) {
|
|
+ memset(&spareFF, 0xFF, sizeof(spareFF));
|
|
+ init = 1;
|
|
+ }
|
|
+
|
|
+ *sequenceNumber = 0;
|
|
+
|
|
+ yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
|
|
+ &spare0, &dummy, 1);
|
|
+ yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
|
|
+ &spare1, &dummy, 1);
|
|
+
|
|
+ if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
|
|
+ *state = YAFFS_BLOCK_STATE_DEAD;
|
|
+ else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0)
|
|
+ *state = YAFFS_BLOCK_STATE_EMPTY;
|
|
+ else
|
|
+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
|
+
|
|
+ return YAFFS_OK;
|
|
+}
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.h linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.h 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,40 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFS_TAGSCOMPAT_H__
|
|
+#define __YAFFS_TAGSCOMPAT_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
|
|
+ int chunkInNAND,
|
|
+ const __u8 * data,
|
|
+ const yaffs_ExtendedTags *
|
|
+ tags);
|
|
+int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
|
|
+ int chunkInNAND,
|
|
+ __u8 * data,
|
|
+ yaffs_ExtendedTags *
|
|
+ tags);
|
|
+int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
|
|
+ int blockNo);
|
|
+int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
|
|
+ int blockNo, yaffs_BlockState *
|
|
+ state, int *sequenceNumber);
|
|
+
|
|
+void yaffs_CalcTagsECC(yaffs_Tags * tags);
|
|
+int yaffs_CheckECCOnTags(yaffs_Tags * tags);
|
|
+int yaffs_CountBits(__u8 byte);
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.c linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.c
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.c 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,28 @@
|
|
+/*
|
|
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include "yaffs_tagsvalidity.h"
|
|
+
|
|
+void yaffs_InitialiseTags(yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ memset(tags, 0, sizeof(yaffs_ExtendedTags));
|
|
+ tags->validMarker0 = 0xAAAAAAAA;
|
|
+ tags->validMarker1 = 0x55555555;
|
|
+}
|
|
+
|
|
+int yaffs_ValidateTags(yaffs_ExtendedTags * tags)
|
|
+{
|
|
+ return (tags->validMarker0 == 0xAAAAAAAA &&
|
|
+ tags->validMarker1 == 0x55555555);
|
|
+
|
|
+}
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.h linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.h 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,24 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+
|
|
+#ifndef __YAFFS_TAGS_VALIDITY_H__
|
|
+#define __YAFFS_TAGS_VALIDITY_H__
|
|
+
|
|
+#include "yaffs_guts.h"
|
|
+
|
|
+void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
|
|
+int yaffs_ValidateTags(yaffs_ExtendedTags * tags);
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yaffsinterface.h linux-2.6.21.1.new/fs/yaffs2/yaffsinterface.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yaffsinterface.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yaffsinterface.h 2007-06-08 14:07:26.000000000 +0200
|
|
@@ -0,0 +1,21 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+#ifndef __YAFFSINTERFACE_H__
|
|
+#define __YAFFSINTERFACE_H__
|
|
+
|
|
+int yaffs_Initialise(unsigned nBlocks);
|
|
+
|
|
+#endif
|
|
diff -urN linux-2.6.21.1/fs/yaffs2/yportenv.h linux-2.6.21.1.new/fs/yaffs2/yportenv.h
|
|
--- linux-2.6.21.1/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux-2.6.21.1.new/fs/yaffs2/yportenv.h 2007-06-08 14:07:27.000000000 +0200
|
|
@@ -0,0 +1,186 @@
|
|
+/*
|
|
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
|
+ *
|
|
+ * Copyright (C) 2002-2007 Aleph One Ltd.
|
|
+ * for Toby Churchill Ltd and Brightstar Engineering
|
|
+ *
|
|
+ * Created by Charles Manning <charles@aleph1.co.uk>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
|
+ */
|
|
+
|
|
+
|
|
+#ifndef __YPORTENV_H__
|
|
+#define __YPORTENV_H__
|
|
+
|
|
+#if defined CONFIG_YAFFS_WINCE
|
|
+
|
|
+#include "ywinceenv.h"
|
|
+
|
|
+#elif defined __KERNEL__
|
|
+
|
|
+#include "moduleconfig.h"
|
|
+
|
|
+/* Linux kernel */
|
|
+#include <linux/version.h>
|
|
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
|
|
+#include <linux/config.h>
|
|
+#endif
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/mm.h>
|
|
+#include <linux/string.h>
|
|
+#include <linux/slab.h>
|
|
+#include <linux/vmalloc.h>
|
|
+
|
|
+#define YCHAR char
|
|
+#define YUCHAR unsigned char
|
|
+#define _Y(x) x
|
|
+#define yaffs_strcpy(a,b) strcpy(a,b)
|
|
+#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
|
|
+#define yaffs_strncmp(a,b,c) strncmp(a,b,c)
|
|
+#define yaffs_strlen(s) strlen(s)
|
|
+#define yaffs_sprintf sprintf
|
|
+#define yaffs_toupper(a) toupper(a)
|
|
+
|
|
+#define Y_INLINE inline
|
|
+
|
|
+#define YAFFS_LOSTNFOUND_NAME "lost+found"
|
|
+#define YAFFS_LOSTNFOUND_PREFIX "obj"
|
|
+
|
|
+/* #define YPRINTF(x) printk x */
|
|
+#define YMALLOC(x) kmalloc(x,GFP_KERNEL)
|
|
+#define YFREE(x) kfree(x)
|
|
+#define YMALLOC_ALT(x) vmalloc(x)
|
|
+#define YFREE_ALT(x) vfree(x)
|
|
+#define YMALLOC_DMA(x) YMALLOC(x)
|
|
+
|
|
+// KR - added for use in scan so processes aren't blocked indefinitely.
|
|
+#define YYIELD() schedule()
|
|
+
|
|
+#define YAFFS_ROOT_MODE 0666
|
|
+#define YAFFS_LOSTNFOUND_MODE 0666
|
|
+
|
|
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
|
+#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
|
|
+#define Y_TIME_CONVERT(x) (x).tv_sec
|
|
+#else
|
|
+#define Y_CURRENT_TIME CURRENT_TIME
|
|
+#define Y_TIME_CONVERT(x) (x)
|
|
+#endif
|
|
+
|
|
+#define yaffs_SumCompare(x,y) ((x) == (y))
|
|
+#define yaffs_strcmp(a,b) strcmp(a,b)
|
|
+
|
|
+#define TENDSTR "\n"
|
|
+#define TSTR(x) KERN_WARNING x
|
|
+#define TOUT(p) printk p
|
|
+
|
|
+#define yaffs_trace(mask, fmt, args...) \
|
|
+ do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
|
|
+ printk(KERN_WARNING "yaffs: " fmt, ## args); \
|
|
+ } while (0)
|
|
+
|
|
+#define compile_time_assertion(assertion) \
|
|
+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
|
|
+
|
|
+#elif defined CONFIG_YAFFS_DIRECT
|
|
+
|
|
+/* Direct interface */
|
|
+#include "ydirectenv.h"
|
|
+
|
|
+#elif defined CONFIG_YAFFS_UTIL
|
|
+
|
|
+/* Stuff for YAFFS utilities */
|
|
+
|
|
+#include "stdlib.h"
|
|
+#include "stdio.h"
|
|
+#include "string.h"
|
|
+
|
|
+#include "devextras.h"
|
|
+
|
|
+#define YMALLOC(x) malloc(x)
|
|
+#define YFREE(x) free(x)
|
|
+#define YMALLOC_ALT(x) malloc(x)
|
|
+#define YFREE_ALT(x) free(x)
|
|
+
|
|
+#define YCHAR char
|
|
+#define YUCHAR unsigned char
|
|
+#define _Y(x) x
|
|
+#define yaffs_strcpy(a,b) strcpy(a,b)
|
|
+#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
|
|
+#define yaffs_strlen(s) strlen(s)
|
|
+#define yaffs_sprintf sprintf
|
|
+#define yaffs_toupper(a) toupper(a)
|
|
+
|
|
+#define Y_INLINE inline
|
|
+
|
|
+/* #define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) */
|
|
+/* #define YALERT(s) YINFO(s) */
|
|
+
|
|
+#define TENDSTR "\n"
|
|
+#define TSTR(x) x
|
|
+#define TOUT(p) printf p
|
|
+
|
|
+#define YAFFS_LOSTNFOUND_NAME "lost+found"
|
|
+#define YAFFS_LOSTNFOUND_PREFIX "obj"
|
|
+/* #define YPRINTF(x) printf x */
|
|
+
|
|
+#define YAFFS_ROOT_MODE 0666
|
|
+#define YAFFS_LOSTNFOUND_MODE 0666
|
|
+
|
|
+#define yaffs_SumCompare(x,y) ((x) == (y))
|
|
+#define yaffs_strcmp(a,b) strcmp(a,b)
|
|
+
|
|
+#else
|
|
+/* Should have specified a configuration type */
|
|
+#error Unknown configuration
|
|
+
|
|
+#endif
|
|
+
|
|
+/* see yaffs_fs.c */
|
|
+extern unsigned int yaffs_traceMask;
|
|
+extern unsigned int yaffs_wr_attempts;
|
|
+
|
|
+/*
|
|
+ * Tracing flags.
|
|
+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
|
|
+ */
|
|
+
|
|
+#define YAFFS_TRACE_OS 0x00000002
|
|
+#define YAFFS_TRACE_ALLOCATE 0x00000004
|
|
+#define YAFFS_TRACE_SCAN 0x00000008
|
|
+#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
|
|
+#define YAFFS_TRACE_ERASE 0x00000020
|
|
+#define YAFFS_TRACE_GC 0x00000040
|
|
+#define YAFFS_TRACE_WRITE 0x00000080
|
|
+#define YAFFS_TRACE_TRACING 0x00000100
|
|
+#define YAFFS_TRACE_DELETION 0x00000200
|
|
+#define YAFFS_TRACE_BUFFERS 0x00000400
|
|
+#define YAFFS_TRACE_NANDACCESS 0x00000800
|
|
+#define YAFFS_TRACE_GC_DETAIL 0x00001000
|
|
+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
|
|
+#define YAFFS_TRACE_MTD 0x00004000
|
|
+#define YAFFS_TRACE_CHECKPOINT 0x00008000
|
|
+
|
|
+#define YAFFS_TRACE_VERIFY 0x00010000
|
|
+#define YAFFS_TRACE_VERIFY_NAND 0x00020000
|
|
+#define YAFFS_TRACE_VERIFY_FULL 0x00040000
|
|
+#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
|
|
+
|
|
+
|
|
+#define YAFFS_TRACE_ERROR 0x40000000
|
|
+#define YAFFS_TRACE_BUG 0x80000000
|
|
+#define YAFFS_TRACE_ALWAYS 0xF0000000
|
|
+
|
|
+
|
|
+#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0)
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+
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+#ifndef CONFIG_YAFFS_WINCE
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+#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__))
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+#endif
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+
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+#endif
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