mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-01 05:54:59 +02:00
da69907072
git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@3960 3c298f89-4303-0410-b956-a3cf2f4a3e73
312 lines
9.0 KiB
Diff
312 lines
9.0 KiB
Diff
diff -urN linux.old/fs/partitions/check.c linux.dev/fs/partitions/check.c
|
|
--- linux.old/fs/partitions/check.c 2006-05-31 02:31:44.000000000 +0200
|
|
+++ linux.dev/fs/partitions/check.c 2006-06-15 01:27:17.000000000 +0200
|
|
@@ -29,6 +29,7 @@
|
|
#include "ldm.h"
|
|
#include "mac.h"
|
|
#include "msdos.h"
|
|
+#include "openwrt.h"
|
|
#include "osf.h"
|
|
#include "sgi.h"
|
|
#include "sun.h"
|
|
@@ -48,6 +49,9 @@
|
|
* Probe partition formats with tables at disk address 0
|
|
* that also have an ADFS boot block at 0xdc0.
|
|
*/
|
|
+#ifdef CONFIG_OPENWRT_PARTITION
|
|
+ openwrt_partition,
|
|
+#endif
|
|
#ifdef CONFIG_ACORN_PARTITION_ICS
|
|
adfspart_check_ICS,
|
|
#endif
|
|
diff -urN linux.old/fs/partitions/Kconfig linux.dev/fs/partitions/Kconfig
|
|
--- linux.old/fs/partitions/Kconfig 2006-05-31 02:31:44.000000000 +0200
|
|
+++ linux.dev/fs/partitions/Kconfig 2006-06-15 01:27:17.000000000 +0200
|
|
@@ -14,6 +14,12 @@
|
|
|
|
If unsure, say N.
|
|
|
|
+config OPENWRT_PARTITION
|
|
+ bool "OpenWrt partition support" if PARTITION_ADVANCED
|
|
+ default y
|
|
+ help
|
|
+ Support the custom OpenWrt partition map
|
|
+
|
|
config ACORN_PARTITION
|
|
bool "Acorn partition support" if PARTITION_ADVANCED
|
|
default y if ARCH_ACORN
|
|
diff -urN linux.old/fs/partitions/Makefile linux.dev/fs/partitions/Makefile
|
|
--- linux.old/fs/partitions/Makefile 2006-05-31 02:31:44.000000000 +0200
|
|
+++ linux.dev/fs/partitions/Makefile 2006-06-15 01:27:17.000000000 +0200
|
|
@@ -11,6 +11,7 @@
|
|
obj-$(CONFIG_MAC_PARTITION) += mac.o
|
|
obj-$(CONFIG_LDM_PARTITION) += ldm.o
|
|
obj-$(CONFIG_MSDOS_PARTITION) += msdos.o
|
|
+obj-$(CONFIG_OPENWRT_PARTITION) += openwrt.o
|
|
obj-$(CONFIG_OSF_PARTITION) += osf.o
|
|
obj-$(CONFIG_SGI_PARTITION) += sgi.o
|
|
obj-$(CONFIG_SUN_PARTITION) += sun.o
|
|
diff -urN linux.old/fs/partitions/openwrt.c linux.dev/fs/partitions/openwrt.c
|
|
--- linux.old/fs/partitions/openwrt.c 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux.dev/fs/partitions/openwrt.c 2006-06-15 01:27:17.000000000 +0200
|
|
@@ -0,0 +1,249 @@
|
|
+/*
|
|
+ * fs/partitions/openwrt.c
|
|
+ *
|
|
+ * Code extracted from drivers/block/genhd.c
|
|
+ * and fs/partitions/msdos.c
|
|
+ *
|
|
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
|
|
+ * Copyright (C) 1991-1998 Linus Torvalds
|
|
+ *
|
|
+ * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
|
|
+ * in the early extended-partition checks and added DM partitions
|
|
+ *
|
|
+ * Support for DiskManager v6.0x added by Mark Lord,
|
|
+ * with information provided by OnTrack. This now works for linux fdisk
|
|
+ * and LILO, as well as loadlin and bootln. Note that disks other than
|
|
+ * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1).
|
|
+ *
|
|
+ * More flexible handling of extended partitions - aeb, 950831
|
|
+ *
|
|
+ * Check partition table on IDE disks for common CHS translations
|
|
+ *
|
|
+ * Re-organised Feb 1998 Russell King
|
|
+ */
|
|
+
|
|
+#include <linux/config.h>
|
|
+
|
|
+#include "check.h"
|
|
+#include "openwrt.h"
|
|
+
|
|
+/*
|
|
+ * Many architectures don't like unaligned accesses, while
|
|
+ * the nr_sects and start_sect partition table entries are
|
|
+ * at a 2 (mod 4) address.
|
|
+ */
|
|
+#include <asm/unaligned.h>
|
|
+
|
|
+#define SYS_IND(p) (get_unaligned(&p->sys_ind))
|
|
+#define NR_SECTS(p) ({ __typeof__(p->nr_sects) __a = \
|
|
+ get_unaligned(&p->nr_sects); \
|
|
+ le32_to_cpu(__a); \
|
|
+ })
|
|
+
|
|
+#define START_SECT(p) ({ __typeof__(p->start_sect) __a = \
|
|
+ get_unaligned(&p->start_sect); \
|
|
+ le32_to_cpu(__a); \
|
|
+ })
|
|
+
|
|
+static inline int is_extended_partition(struct partition *p)
|
|
+{
|
|
+ return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
|
|
+ SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
|
|
+ SYS_IND(p) == LINUX_EXTENDED_PARTITION);
|
|
+}
|
|
+
|
|
+#define MSDOS_LABEL_MAGIC1 0x55
|
|
+#define MSDOS_LABEL_MAGIC2 0xAA
|
|
+
|
|
+static inline int
|
|
+msdos_magic_present(unsigned char *p)
|
|
+{
|
|
+ return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
|
|
+}
|
|
+
|
|
+static inline int
|
|
+openwrt_magic_present(unsigned char *p)
|
|
+{
|
|
+ return (p[0] == 'O' &&
|
|
+ p[1] == 'W' &&
|
|
+ p[2] == 'R' &&
|
|
+ p[3] == 'T');
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Create devices for each logical partition in an extended partition.
|
|
+ * The logical partitions form a linked list, with each entry being
|
|
+ * a partition table with two entries. The first entry
|
|
+ * is the real data partition (with a start relative to the partition
|
|
+ * table start). The second is a pointer to the next logical partition
|
|
+ * (with a start relative to the entire extended partition).
|
|
+ * We do not create a Linux partition for the partition tables, but
|
|
+ * only for the actual data partitions.
|
|
+ */
|
|
+
|
|
+static void
|
|
+parse_extended(struct parsed_partitions *state, struct block_device *bdev,
|
|
+ u32 first_sector, u32 first_size)
|
|
+{
|
|
+ struct partition *p;
|
|
+ Sector sect;
|
|
+ unsigned char *data;
|
|
+ u32 this_sector, this_size;
|
|
+ int sector_size = bdev_hardsect_size(bdev) / 512;
|
|
+ int loopct = 0; /* number of links followed
|
|
+ without finding a data partition */
|
|
+ int i;
|
|
+
|
|
+ this_sector = first_sector;
|
|
+ this_size = first_size;
|
|
+
|
|
+ while (1) {
|
|
+ if (++loopct > 100)
|
|
+ return;
|
|
+ if (state->next == state->limit)
|
|
+ return;
|
|
+ data = read_dev_sector(bdev, this_sector, §);
|
|
+ if (!data)
|
|
+ return;
|
|
+
|
|
+ if (!msdos_magic_present(data + 510))
|
|
+ goto done;
|
|
+
|
|
+ p = (struct partition *) (data + 0x1be);
|
|
+
|
|
+ /*
|
|
+ * Usually, the first entry is the real data partition,
|
|
+ * the 2nd entry is the next extended partition, or empty,
|
|
+ * and the 3rd and 4th entries are unused.
|
|
+ * However, DRDOS sometimes has the extended partition as
|
|
+ * the first entry (when the data partition is empty),
|
|
+ * and OS/2 seems to use all four entries.
|
|
+ */
|
|
+
|
|
+ /*
|
|
+ * First process the data partition(s)
|
|
+ */
|
|
+ for (i=0; i<4; i++, p++) {
|
|
+ u32 offs, size, next;
|
|
+ if (!NR_SECTS(p) || is_extended_partition(p))
|
|
+ continue;
|
|
+
|
|
+ /* Check the 3rd and 4th entries -
|
|
+ these sometimes contain random garbage */
|
|
+ offs = START_SECT(p)*sector_size;
|
|
+ size = NR_SECTS(p)*sector_size;
|
|
+ next = this_sector + offs;
|
|
+ if (i >= 2) {
|
|
+ if (offs + size > this_size)
|
|
+ continue;
|
|
+ if (next < first_sector)
|
|
+ continue;
|
|
+ if (next + size > first_sector + first_size)
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ put_partition(state, state->next, next, size);
|
|
+ if (SYS_IND(p) == LINUX_RAID_PARTITION)
|
|
+ state->parts[state->next].flags = 1;
|
|
+ loopct = 0;
|
|
+ if (++state->next == state->limit)
|
|
+ goto done;
|
|
+ }
|
|
+ /*
|
|
+ * Next, process the (first) extended partition, if present.
|
|
+ * (So far, there seems to be no reason to make
|
|
+ * parse_extended() recursive and allow a tree
|
|
+ * of extended partitions.)
|
|
+ * It should be a link to the next logical partition.
|
|
+ */
|
|
+ p -= 4;
|
|
+ for (i=0; i<4; i++, p++)
|
|
+ if (NR_SECTS(p) && is_extended_partition(p))
|
|
+ break;
|
|
+ if (i == 4)
|
|
+ goto done; /* nothing left to do */
|
|
+
|
|
+ this_sector = first_sector + START_SECT(p) * sector_size;
|
|
+ this_size = NR_SECTS(p) * sector_size;
|
|
+ put_dev_sector(sect);
|
|
+ }
|
|
+done:
|
|
+ put_dev_sector(sect);
|
|
+}
|
|
+
|
|
+
|
|
+int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev)
|
|
+{
|
|
+ int sector_size = bdev_hardsect_size(bdev) / 512;
|
|
+ Sector sect;
|
|
+ unsigned char *data;
|
|
+ struct partition *p;
|
|
+ int slot;
|
|
+ u32 last_block = 0;
|
|
+ u32 size = 0;
|
|
+ int firstfree = 5;
|
|
+
|
|
+ data = read_dev_sector(bdev, 0, §);
|
|
+ if (!data)
|
|
+ return -1;
|
|
+ if (!openwrt_magic_present(data)) {
|
|
+ printk("No OpenWrt partition table detected\n");
|
|
+ put_dev_sector(sect);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ /*
|
|
+ * Now that the 55aa signature is present, this is probably
|
|
+ * either the boot sector of a FAT filesystem or a DOS-type
|
|
+ * partition table. Reject this in case the boot indicator
|
|
+ * is not 0 or 0x80.
|
|
+ */
|
|
+ p = (struct partition *) (data + 0x1be);
|
|
+ for (slot = 1; slot <= 4; slot++, p++) {
|
|
+ if (p->boot_ind != 0 && p->boot_ind != 0x80) {
|
|
+ put_dev_sector(sect);
|
|
+ return 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ p = (struct partition *) (data + 0x1be);
|
|
+
|
|
+ /*
|
|
+ * Look for partitions in two passes:
|
|
+ * First find the primary and DOS-type extended partitions.
|
|
+ */
|
|
+
|
|
+ state->next = 6;
|
|
+ for (slot = 1 ; slot <= 4 ; slot++, p++) {
|
|
+ u32 start = START_SECT(p)*sector_size;
|
|
+ size = NR_SECTS(p)*sector_size;
|
|
+ if (!size) {
|
|
+ if (firstfree > slot)
|
|
+ firstfree = slot;
|
|
+
|
|
+ continue;
|
|
+ }
|
|
+ if (is_extended_partition(p)) {
|
|
+ /* prevent someone doing mkfs or mkswap on an
|
|
+ extended partition, but leave room for LILO */
|
|
+ last_block = start + size;
|
|
+ put_partition(state, slot, start, size == 1 ? 1 : 2);
|
|
+ printk(" <");
|
|
+ parse_extended(state, bdev, start, size);
|
|
+ printk(" >");
|
|
+ continue;
|
|
+ }
|
|
+ if ((start + size) > get_capacity(bdev->bd_disk))
|
|
+ size = get_capacity(bdev->bd_disk) - start;
|
|
+ last_block = start + size;
|
|
+ put_partition(state, slot, start, size);
|
|
+ }
|
|
+ if (last_block + 1024 < (size = get_capacity(bdev->bd_disk)))
|
|
+ put_partition(state, firstfree, last_block, size - last_block);
|
|
+
|
|
+ printk("\n");
|
|
+
|
|
+ put_dev_sector(sect);
|
|
+ return 1;
|
|
+}
|
|
+
|
|
diff -urN linux.old/fs/partitions/openwrt.h linux.dev/fs/partitions/openwrt.h
|
|
--- linux.old/fs/partitions/openwrt.h 1970-01-01 01:00:00.000000000 +0100
|
|
+++ linux.dev/fs/partitions/openwrt.h 2006-06-15 01:27:17.000000000 +0200
|
|
@@ -0,0 +1,6 @@
|
|
+/*
|
|
+ * fs/partitions/openwrt.h
|
|
+ */
|
|
+
|
|
+int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev);
|
|
+
|