mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
add generic 2.6.29 patches and config (squashfs still untested, user space mkfs still missing)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15251 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
@@ -1,7 +1,268 @@
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diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3/drivers/mtd/devices/block2mtd.c
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--- linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c 2009-03-09 05:13:51.000000000 +0100
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+++ linux-2.6.29-rc3/drivers/mtd/devices/block2mtd.c 2009-03-09 18:18:49.000000000 +0100
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@@ -28,6 +28,8 @@
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--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -53,6 +53,16 @@ config MTD_TESTS
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should normally be compiled as kernel modules. The modules perform
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various checks and verifications when loaded.
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+config MTD_ROOTFS_ROOT_DEV
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+ bool "Automatically set 'rootfs' partition to be root filesystem"
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+ depends on MTD_PARTITIONS
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+ default y
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+
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+config MTD_ROOTFS_SPLIT
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+ bool "Automatically split 'rootfs' partition for squashfs"
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+ depends on MTD_PARTITIONS
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+ default y
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+
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config MTD_REDBOOT_PARTS
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tristate "RedBoot partition table parsing"
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depends on MTD_PARTITIONS
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -18,6 +18,8 @@
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/compatmac.h>
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+#include <linux/root_dev.h>
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+#include <linux/magic.h>
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/* Our partition linked list */
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static LIST_HEAD(mtd_partitions);
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@@ -37,7 +39,7 @@ struct mtd_part {
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* the pointer to that structure with this macro.
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*/
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#define PART(x) ((struct mtd_part *)(x))
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-
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+#define IS_PART(mtd) (mtd->read == part_read)
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/*
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* MTD methods which simply translate the effective address and pass through
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@@ -489,6 +491,156 @@ out_register:
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return slave;
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}
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+#ifdef CONFIG_MTD_ROOTFS_SPLIT
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+#define ROOTFS_SPLIT_NAME "rootfs_data"
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+#define ROOTFS_REMOVED_NAME "<removed>"
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+
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+struct squashfs_super_block {
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+ __le32 s_magic;
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+ __le32 pad0[9];
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+ __le64 bytes_used;
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+};
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+
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+
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+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
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+{
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+ char buf[512];
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+ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
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+ int len, ret;
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+
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+ ret = master->read(master, offset, sizeof(*sb), &len, buf);
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+ if (ret || (len != sizeof(*sb))) {
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+ printk(KERN_ALERT "split_squashfs: error occured while reading "
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+ "from \"%s\"\n", master->name);
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+ return -EINVAL;
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+ }
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+
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+ if (*((u32 *) buf) != SQUASHFS_MAGIC) {
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+ printk(KERN_ALERT "split_squashfs: no squashfs found in \"%s\"\n",
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+ master->name);
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+ *split_offset = 0;
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+ return 0;
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+ }
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+
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+ if (sb->bytes_used <= 0) {
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+ printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
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+ master->name);
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+ *split_offset = 0;
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+ return 0;
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+ }
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+
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+ len = (u32) sb->bytes_used;
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+ len += (offset & 0x000fffff);
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+ len += (master->erasesize - 1);
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+ len &= ~(master->erasesize - 1);
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+ len -= (offset & 0x000fffff);
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+ *split_offset = offset + len;
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+
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+ return 0;
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+}
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+
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+static int split_rootfs_data(struct mtd_info *master, struct mtd_info *rpart, const struct mtd_partition *part,
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+ int index)
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+{
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+ struct mtd_partition *dpart;
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+ struct mtd_part *slave = NULL;
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+ int split_offset = 0;
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+ int ret;
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+
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+ ret = split_squashfs(master, part->offset, &split_offset);
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+ if (ret)
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+ return ret;
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+
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+ if (split_offset <= 0)
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+ return 0;
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+
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+ dpart = kmalloc(sizeof(*part)+sizeof(ROOTFS_SPLIT_NAME)+1, GFP_KERNEL);
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+ if (dpart == NULL) {
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+ printk(KERN_INFO "split_squashfs: no memory for partition \"%s\"\n",
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+ ROOTFS_SPLIT_NAME);
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+ return -ENOMEM;
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+ }
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+
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+ memcpy(dpart, part, sizeof(*part));
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+ dpart->name = (unsigned char *)&dpart[1];
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+ strcpy(dpart->name, ROOTFS_SPLIT_NAME);
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+
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+ dpart->size -= split_offset - dpart->offset;
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+ dpart->offset = split_offset;
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+
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+ if (dpart == NULL)
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+ return 1;
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+
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+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=%llX, len=%llX \n",
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+ ROOTFS_SPLIT_NAME, dpart->offset, dpart->size);
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+
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+ slave = add_one_partition(master, dpart, index, split_offset);
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+ if (!slave) {
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+ kfree(dpart);
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+ return -ENOMEM;
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+ }
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+ rpart->split = &slave->mtd;
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+
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+ return 0;
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+}
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+
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+static int refresh_rootfs_split(struct mtd_info *mtd)
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+{
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+ struct mtd_partition tpart;
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+ struct mtd_part *part;
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+ char *name;
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+ int index = 0;
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+ int offset, size;
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+ int ret;
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+
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+ part = PART(mtd);
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+
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+ /* check for the new squashfs offset first */
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+ ret = split_squashfs(part->master, part->offset, &offset);
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+ if (ret)
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+ return ret;
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+
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+ if ((offset > 0) && !mtd->split) {
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+ printk(KERN_INFO "%s: creating new split partition for \"%s\"\n", __func__, mtd->name);
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+ /* if we don't have a rootfs split partition, create a new one */
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+ tpart.name = (char *) mtd->name;
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+ tpart.size = mtd->size;
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+ tpart.offset = part->offset;
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+
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+ /* find the index of the last partition */
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+ if (!list_empty(&mtd_partitions))
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+ index = list_first_entry(&mtd_partitions, struct mtd_part, list)->index + 1;
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+
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+ return split_rootfs_data(part->master, &part->mtd, &tpart, index);
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+ } else if ((offset > 0) && mtd->split) {
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+ /* update the offsets of the existing partition */
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+ size = mtd->size + part->offset - offset;
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+
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+ part = PART(mtd->split);
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+ part->offset = offset;
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+ part->mtd.size = size;
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+ printk(KERN_INFO "%s: %s partition \"" ROOTFS_SPLIT_NAME "\", offset: 0x%06x (0x%06x)\n",
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+ __func__, (!strcmp(part->mtd.name, ROOTFS_SPLIT_NAME) ? "updating" : "creating"),
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+ (u32) part->offset, (u32) part->mtd.size);
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+ name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL);
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+ strcpy(name, ROOTFS_SPLIT_NAME);
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+ part->mtd.name = name;
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+ } else if ((offset <= 0) && mtd->split) {
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+ printk(KERN_INFO "%s: removing partition \"%s\"\n", __func__, mtd->split->name);
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+
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+ /* mark existing partition as removed */
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+ part = PART(mtd->split);
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+ name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL);
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+ strcpy(name, ROOTFS_REMOVED_NAME);
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+ part->mtd.name = name;
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+ part->offset = 0;
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+ part->mtd.size = 0;
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+ }
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+
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+ return 0;
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+}
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+#endif /* CONFIG_MTD_ROOTFS_SPLIT */
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+
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/*
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* This function, given a master MTD object and a partition table, creates
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* and registers slave MTD objects which are bound to the master according to
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@@ -502,14 +654,29 @@ int add_mtd_partitions(struct mtd_info *
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{
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struct mtd_part *slave;
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uint64_t cur_offset = 0;
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- int i;
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+ int i, j, ret;
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printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
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- for (i = 0; i < nbparts; i++) {
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- slave = add_one_partition(master, parts + i, i, cur_offset);
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+ for (i = 0, j = 0; i < nbparts; i++) {
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+ slave = add_one_partition(master, parts + i, j++, cur_offset);
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if (!slave)
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return -ENOMEM;
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+
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+ if (!strcmp(parts[i].name, "rootfs") && slave->registered) {
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+#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
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+ if (ROOT_DEV == 0) {
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+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
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+ "set to be root filesystem\n");
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+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, slave->mtd.index);
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+ }
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+#endif
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+#ifdef CONFIG_MTD_ROOTFS_SPLIT
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+ ret = split_rootfs_data(master, &slave->mtd, &parts[i], j);
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+ if (ret == 0)
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+ j++;
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+#endif
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+ }
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cur_offset = slave->offset + slave->mtd.size;
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}
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@@ -517,6 +684,32 @@ int add_mtd_partitions(struct mtd_info *
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}
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EXPORT_SYMBOL(add_mtd_partitions);
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+int refresh_mtd_partitions(struct mtd_info *mtd)
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+{
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+ int ret = 0;
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+
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+ if (IS_PART(mtd)) {
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+ struct mtd_part *part;
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+ struct mtd_info *master;
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+
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+ part = PART(mtd);
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+ master = part->master;
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+ if (master->refresh_device)
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+ ret = master->refresh_device(master);
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+ }
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+
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+ if (!ret && mtd->refresh_device)
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+ ret = mtd->refresh_device(mtd);
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+
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+#ifdef CONFIG_MTD_ROOTFS_SPLIT
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+ if (!ret && IS_PART(mtd) && !strcmp(mtd->name, "rootfs"))
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+ refresh_rootfs_split(mtd);
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+#endif
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(refresh_mtd_partitions);
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+
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static DEFINE_SPINLOCK(part_parser_lock);
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static LIST_HEAD(part_parsers);
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--- a/drivers/mtd/devices/block2mtd.c
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+++ b/drivers/mtd/devices/block2mtd.c
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@@ -29,6 +29,8 @@ struct block2mtd_dev {
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struct block_device *blkdev;
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struct mtd_info mtd;
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struct mutex write_mutex;
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@@ -10,7 +271,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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};
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@@ -80,6 +82,12 @@
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@@ -81,6 +83,12 @@ static int block2mtd_erase(struct mtd_in
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size_t len = instr->len;
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int err;
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@@ -23,7 +284,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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instr->state = MTD_ERASING;
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mutex_lock(&dev->write_mutex);
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err = _block2mtd_erase(dev, from, len);
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@@ -92,6 +100,10 @@
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@@ -93,6 +101,10 @@ static int block2mtd_erase(struct mtd_in
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instr->state = MTD_ERASE_DONE;
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mtd_erase_callback(instr);
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@@ -34,7 +295,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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return err;
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}
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@@ -103,10 +115,14 @@
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@@ -104,10 +116,14 @@ static int block2mtd_read(struct mtd_inf
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struct page *page;
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int index = from >> PAGE_SHIFT;
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int offset = from & (PAGE_SIZE-1);
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@@ -52,7 +313,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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if (from + len > mtd->size)
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len = mtd->size - from;
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@@ -121,10 +137,14 @@
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@@ -122,10 +138,14 @@ static int block2mtd_read(struct mtd_inf
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len = len - cpylen;
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page = page_read(dev->blkdev->bd_inode->i_mapping, index);
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@@ -71,7 +332,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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memcpy(buf, page_address(page) + offset, cpylen);
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page_cache_release(page);
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@@ -135,7 +155,10 @@
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@@ -136,7 +156,10 @@ static int block2mtd_read(struct mtd_inf
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offset = 0;
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index++;
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}
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@@ -83,7 +344,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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}
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@@ -187,12 +210,22 @@
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@@ -188,12 +211,22 @@ static int block2mtd_write(struct mtd_in
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size_t *retlen, const u_char *buf)
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{
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struct block2mtd_dev *dev = mtd->priv;
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@@ -110,7 +371,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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if (to + len > mtd->size)
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len = mtd->size - to;
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@@ -201,6 +234,9 @@
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@@ -202,6 +235,9 @@ static int block2mtd_write(struct mtd_in
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mutex_unlock(&dev->write_mutex);
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if (err > 0)
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err = 0;
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@@ -120,7 +381,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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return err;
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}
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@@ -209,30 +245,15 @@
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@@ -210,52 +246,29 @@ static int block2mtd_write(struct mtd_in
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static void block2mtd_sync(struct mtd_info *mtd)
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{
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struct block2mtd_dev *dev = mtd->priv;
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@@ -128,37 +389,44 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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- return;
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-}
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-
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+ read_lock(&dev->bdev_mutex);
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+ if (dev->blkdev)
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+ sync_blockdev(dev->blkdev);
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+ read_unlock(&dev->bdev_mutex);
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-
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-static void block2mtd_free_device(struct block2mtd_dev *dev)
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-{
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- if (!dev)
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- return;
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-
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- kfree(dev->mtd.name);
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-
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- if (dev->blkdev) {
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- invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping,
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- 0, -1);
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- close_bdev_exclusive(dev->blkdev, FMODE_READ|FMODE_WRITE);
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- }
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-
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+ read_lock(&dev->bdev_mutex);
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+ if (dev->blkdev)
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+ sync_blockdev(dev->blkdev);
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+ read_unlock(&dev->bdev_mutex);
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- kfree(dev);
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+ return;
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}
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-
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-/* FIXME: ensure that mtd->size % erase_size == 0 */
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-static struct block2mtd_dev *add_device(char *devname, int erase_size)
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-static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
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+static int _open_bdev(struct block2mtd_dev *dev)
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{
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struct block_device *bdev;
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struct block2mtd_dev *dev;
|
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@@ -246,14 +267,14 @@
|
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return NULL;
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- struct block2mtd_dev *dev;
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- struct mtd_partition *part;
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- char *name;
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-
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- if (!devname)
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- return NULL;
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-
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- dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL);
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- if (!dev)
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- return NULL;
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/* Get a handle on the device */
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- bdev = open_bdev_exclusive(devname, FMODE_READ|FMODE_WRITE, NULL);
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@@ -174,7 +442,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
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if (devt) {
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bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
|
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}
|
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@@ -261,17 +282,97 @@
|
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@@ -263,17 +276,97 @@ static struct block2mtd_dev *add_device(
|
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#endif
|
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|
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if (IS_ERR(bdev)) {
|
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@@ -273,39 +541,18 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/devices/block2mtd.c linux-2.6.29-rc3
|
||||
mutex_init(&dev->write_mutex);
|
||||
+ rwlock_init(&dev->bdev_mutex);
|
||||
|
||||
/* Setup the MTD structure */
|
||||
/* make the name contain the block device in */
|
||||
@@ -295,6 +396,7 @@
|
||||
if (!mtdname)
|
||||
mtdname = devname;
|
||||
@@ -297,6 +390,7 @@ static struct block2mtd_dev *add_device(
|
||||
dev->mtd.read = block2mtd_read;
|
||||
dev->mtd.priv = dev;
|
||||
dev->mtd.owner = THIS_MODULE;
|
||||
+ dev->mtd.refresh_device = block2mtd_refresh;
|
||||
|
||||
if (add_mtd_device(&dev->mtd)) {
|
||||
/* Device didnt get added, so free the entry */
|
||||
diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/Kconfig linux-2.6.29-rc3/drivers/mtd/Kconfig
|
||||
--- linux-2.6.29-rc3.orig/drivers/mtd/Kconfig 2009-03-09 05:13:51.000000000 +0100
|
||||
+++ linux-2.6.29-rc3/drivers/mtd/Kconfig 2009-03-09 18:10:48.000000000 +0100
|
||||
@@ -53,6 +53,16 @@
|
||||
should normally be compiled as kernel modules. The modules perform
|
||||
various checks and verifications when loaded.
|
||||
|
||||
+config MTD_ROOTFS_ROOT_DEV
|
||||
+ bool "Automatically set 'rootfs' partition to be root filesystem"
|
||||
+ depends on MTD_PARTITIONS
|
||||
+ default y
|
||||
+
|
||||
+config MTD_ROOTFS_SPLIT
|
||||
+ bool "Automatically split 'rootfs' partition for squashfs"
|
||||
+ depends on MTD_PARTITIONS
|
||||
+ default y
|
||||
+
|
||||
config MTD_REDBOOT_PARTS
|
||||
tristate "RedBoot partition table parsing"
|
||||
depends on MTD_PARTITIONS
|
||||
diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/mtdchar.c linux-2.6.29-rc3/drivers/mtd/mtdchar.c
|
||||
--- linux-2.6.29-rc3.orig/drivers/mtd/mtdchar.c 2009-03-09 05:13:51.000000000 +0100
|
||||
+++ linux-2.6.29-rc3/drivers/mtd/mtdchar.c 2009-03-09 18:10:48.000000000 +0100
|
||||
part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
|
||||
part->name = dev->mtd.name;
|
||||
--- a/drivers/mtd/mtdchar.c
|
||||
+++ b/drivers/mtd/mtdchar.c
|
||||
@@ -16,6 +16,7 @@
|
||||
|
||||
#include <linux/mtd/mtd.h>
|
||||
@@ -314,7 +561,7 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/mtdchar.c linux-2.6.29-rc3/drivers/m
|
||||
|
||||
#include <asm/uaccess.h>
|
||||
|
||||
@@ -773,6 +774,13 @@
|
||||
@@ -773,6 +774,13 @@ static int mtd_ioctl(struct inode *inode
|
||||
file->f_pos = 0;
|
||||
break;
|
||||
}
|
||||
@@ -328,246 +575,9 @@ diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/mtdchar.c linux-2.6.29-rc3/drivers/m
|
||||
|
||||
default:
|
||||
ret = -ENOTTY;
|
||||
diff -ruN linux-2.6.29-rc3.orig/drivers/mtd/mtdpart.c linux-2.6.29-rc3/drivers/mtd/mtdpart.c
|
||||
--- linux-2.6.29-rc3.orig/drivers/mtd/mtdpart.c 2009-03-09 05:13:51.000000000 +0100
|
||||
+++ linux-2.6.29-rc3/drivers/mtd/mtdpart.c 2009-03-09 18:29:58.000000000 +0100
|
||||
@@ -18,6 +18,8 @@
|
||||
#include <linux/mtd/mtd.h>
|
||||
#include <linux/mtd/partitions.h>
|
||||
#include <linux/mtd/compatmac.h>
|
||||
+#include <linux/squashfs_fs.h>
|
||||
+#include <linux/root_dev.h>
|
||||
|
||||
/* Our partition linked list */
|
||||
static LIST_HEAD(mtd_partitions);
|
||||
@@ -37,7 +39,7 @@
|
||||
* the pointer to that structure with this macro.
|
||||
*/
|
||||
#define PART(x) ((struct mtd_part *)(x))
|
||||
-
|
||||
+#define IS_PART(mtd) (mtd->read == part_read)
|
||||
|
||||
/*
|
||||
* MTD methods which simply translate the effective address and pass through
|
||||
@@ -489,6 +491,148 @@
|
||||
return slave;
|
||||
}
|
||||
|
||||
+#ifdef CONFIG_MTD_ROOTFS_SPLIT
|
||||
+#define ROOTFS_SPLIT_NAME "rootfs_data"
|
||||
+#define ROOTFS_REMOVED_NAME "<removed>"
|
||||
+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
|
||||
+{
|
||||
+ char buf[512];
|
||||
+ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
|
||||
+ int len, ret;
|
||||
+
|
||||
+ ret = master->read(master, offset, sizeof(*sb), &len, buf);
|
||||
+ if (ret || (len != sizeof(*sb))) {
|
||||
+ printk(KERN_ALERT "split_squashfs: error occured while reading "
|
||||
+ "from \"%s\"\n", master->name);
|
||||
+ return -EINVAL;
|
||||
+ }
|
||||
+
|
||||
+ if (*((u32 *) buf) != SQUASHFS_MAGIC) {
|
||||
+ printk(KERN_ALERT "split_squashfs: no squashfs found in \"%s\"\n",
|
||||
+ master->name);
|
||||
+ *split_offset = 0;
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
+ if (sb->bytes_used <= 0) {
|
||||
+ printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
|
||||
+ master->name);
|
||||
+ *split_offset = 0;
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
+ len = (u32) sb->bytes_used;
|
||||
+ len += (offset & 0x000fffff);
|
||||
+ len += (master->erasesize - 1);
|
||||
+ len &= ~(master->erasesize - 1);
|
||||
+ len -= (offset & 0x000fffff);
|
||||
+ *split_offset = offset + len;
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static int split_rootfs_data(struct mtd_info *master, struct mtd_info *rpart, const struct mtd_partition *part,
|
||||
+ int index)
|
||||
+{
|
||||
+ struct mtd_partition *dpart;
|
||||
+ struct mtd_part *slave = NULL;
|
||||
+ int split_offset = 0;
|
||||
+ int ret;
|
||||
+
|
||||
+ ret = split_squashfs(master, part->offset, &split_offset);
|
||||
+ if (ret)
|
||||
+ return ret;
|
||||
+
|
||||
+ if (split_offset <= 0)
|
||||
+ return 0;
|
||||
+
|
||||
+ dpart = kmalloc(sizeof(*part)+sizeof(ROOTFS_SPLIT_NAME)+1, GFP_KERNEL);
|
||||
+ if (dpart == NULL) {
|
||||
+ printk(KERN_INFO "split_squashfs: no memory for partition \"%s\"\n",
|
||||
+ ROOTFS_SPLIT_NAME);
|
||||
+ return -ENOMEM;
|
||||
+ }
|
||||
+
|
||||
+ memcpy(dpart, part, sizeof(*part));
|
||||
+ dpart->name = (unsigned char *)&dpart[1];
|
||||
+ strcpy(dpart->name, ROOTFS_SPLIT_NAME);
|
||||
+
|
||||
+ dpart->size -= split_offset - dpart->offset;
|
||||
+ dpart->offset = split_offset;
|
||||
+
|
||||
+ if (dpart == NULL)
|
||||
+ return 1;
|
||||
+
|
||||
+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=%X, len=%X \n",
|
||||
+ ROOTFS_SPLIT_NAME, dpart->offset, dpart->size);
|
||||
+
|
||||
+ slave = add_one_partition(master, dpart, index, split_offset);
|
||||
+ if (!slave) {
|
||||
+ kfree(dpart);
|
||||
+ return -ENOMEM;
|
||||
+ }
|
||||
+ rpart->split = &slave->mtd;
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static int refresh_rootfs_split(struct mtd_info *mtd)
|
||||
+{
|
||||
+ struct mtd_partition tpart;
|
||||
+ struct mtd_part *part;
|
||||
+ char *name;
|
||||
+ int index = 0;
|
||||
+ int offset, size;
|
||||
+ int ret;
|
||||
+
|
||||
+ part = PART(mtd);
|
||||
+
|
||||
+ /* check for the new squashfs offset first */
|
||||
+ ret = split_squashfs(part->master, part->offset, &offset);
|
||||
+ if (ret)
|
||||
+ return ret;
|
||||
+
|
||||
+ if ((offset > 0) && !mtd->split) {
|
||||
+ printk(KERN_INFO "%s: creating new split partition for \"%s\"\n", __func__, mtd->name);
|
||||
+ /* if we don't have a rootfs split partition, create a new one */
|
||||
+ tpart.name = (char *) mtd->name;
|
||||
+ tpart.size = mtd->size;
|
||||
+ tpart.offset = part->offset;
|
||||
+
|
||||
+ /* find the index of the last partition */
|
||||
+ if (!list_empty(&mtd_partitions))
|
||||
+ index = list_first_entry(&mtd_partitions, struct mtd_part, list)->index + 1;
|
||||
+
|
||||
+ return split_rootfs_data(part->master, &part->mtd, &tpart, index);
|
||||
+ } else if ((offset > 0) && mtd->split) {
|
||||
+ /* update the offsets of the existing partition */
|
||||
+ size = mtd->size + part->offset - offset;
|
||||
+
|
||||
+ part = PART(mtd->split);
|
||||
+ part->offset = offset;
|
||||
+ part->mtd.size = size;
|
||||
+ printk(KERN_INFO "%s: %s partition \"" ROOTFS_SPLIT_NAME "\", offset: 0x%06x (0x%06x)\n",
|
||||
+ __func__, (!strcmp(part->mtd.name, ROOTFS_SPLIT_NAME) ? "updating" : "creating"),
|
||||
+ part->offset, part->mtd.size);
|
||||
+ name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL);
|
||||
+ strcpy(name, ROOTFS_SPLIT_NAME);
|
||||
+ part->mtd.name = name;
|
||||
+ } else if ((offset <= 0) && mtd->split) {
|
||||
+ printk(KERN_INFO "%s: removing partition \"%s\"\n", __func__, mtd->split->name);
|
||||
+
|
||||
+ /* mark existing partition as removed */
|
||||
+ part = PART(mtd->split);
|
||||
+ name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL);
|
||||
+ strcpy(name, ROOTFS_REMOVED_NAME);
|
||||
+ part->mtd.name = name;
|
||||
+ part->offset = 0;
|
||||
+ part->mtd.size = 0;
|
||||
+ }
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+#endif /* CONFIG_MTD_ROOTFS_SPLIT */
|
||||
+
|
||||
/*
|
||||
* This function, given a master MTD object and a partition table, creates
|
||||
* and registers slave MTD objects which are bound to the master according to
|
||||
@@ -502,14 +646,29 @@
|
||||
{
|
||||
struct mtd_part *slave;
|
||||
uint64_t cur_offset = 0;
|
||||
- int i;
|
||||
+ int i, j, ret;
|
||||
|
||||
printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
|
||||
|
||||
- for (i = 0; i < nbparts; i++) {
|
||||
- slave = add_one_partition(master, parts + i, i, cur_offset);
|
||||
+ for (i = 0, j = 0; i < nbparts; i++) {
|
||||
+ slave = add_one_partition(master, parts + i, j++, cur_offset);
|
||||
if (!slave)
|
||||
return -ENOMEM;
|
||||
+
|
||||
+ if (!strcmp(parts[i].name, "rootfs") && slave->registered) {
|
||||
+#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
|
||||
+ if (ROOT_DEV == 0) {
|
||||
+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
|
||||
+ "set to be root filesystem\n");
|
||||
+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, slave->mtd.index);
|
||||
+ }
|
||||
+#endif
|
||||
+#ifdef CONFIG_MTD_ROOTFS_SPLIT
|
||||
+ ret = split_rootfs_data(master, &slave->mtd, &parts[i], j);
|
||||
+ if (ret == 0)
|
||||
+ j++;
|
||||
+#endif
|
||||
+ }
|
||||
cur_offset = slave->offset + slave->mtd.size;
|
||||
}
|
||||
|
||||
@@ -517,6 +676,32 @@
|
||||
}
|
||||
EXPORT_SYMBOL(add_mtd_partitions);
|
||||
|
||||
+int refresh_mtd_partitions(struct mtd_info *mtd)
|
||||
+{
|
||||
+ int ret = 0;
|
||||
+
|
||||
+ if (IS_PART(mtd)) {
|
||||
+ struct mtd_part *part;
|
||||
+ struct mtd_info *master;
|
||||
+
|
||||
+ part = PART(mtd);
|
||||
+ master = part->master;
|
||||
+ if (master->refresh_device)
|
||||
+ ret = master->refresh_device(master);
|
||||
+ }
|
||||
+
|
||||
+ if (!ret && mtd->refresh_device)
|
||||
+ ret = mtd->refresh_device(mtd);
|
||||
+
|
||||
+#ifdef CONFIG_MTD_ROOTFS_SPLIT
|
||||
+ if (!ret && IS_PART(mtd) && !strcmp(mtd->name, "rootfs"))
|
||||
+ refresh_rootfs_split(mtd);
|
||||
+#endif
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+EXPORT_SYMBOL_GPL(refresh_mtd_partitions);
|
||||
+
|
||||
static DEFINE_SPINLOCK(part_parser_lock);
|
||||
static LIST_HEAD(part_parsers);
|
||||
|
||||
diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/mtd.h linux-2.6.29-rc3/include/linux/mtd/mtd.h
|
||||
--- linux-2.6.29-rc3.orig/include/linux/mtd/mtd.h 2009-03-09 05:13:58.000000000 +0100
|
||||
+++ linux-2.6.29-rc3/include/linux/mtd/mtd.h 2009-03-09 18:10:48.000000000 +0100
|
||||
@@ -100,6 +100,7 @@
|
||||
--- a/include/linux/mtd/mtd.h
|
||||
+++ b/include/linux/mtd/mtd.h
|
||||
@@ -100,6 +100,7 @@ struct mtd_oob_ops {
|
||||
uint8_t *oobbuf;
|
||||
};
|
||||
|
||||
@@ -575,7 +585,7 @@ diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/mtd.h linux-2.6.29-rc3/include
|
||||
struct mtd_info {
|
||||
u_char type;
|
||||
uint32_t flags;
|
||||
@@ -225,6 +226,9 @@
|
||||
@@ -225,6 +226,9 @@ struct mtd_info {
|
||||
struct module *owner;
|
||||
int usecount;
|
||||
|
||||
@@ -585,9 +595,8 @@ diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/mtd.h linux-2.6.29-rc3/include
|
||||
/* If the driver is something smart, like UBI, it may need to maintain
|
||||
* its own reference counting. The below functions are only for driver.
|
||||
* The driver may register its callbacks. These callbacks are not
|
||||
diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/partitions.h linux-2.6.29-rc3/include/linux/mtd/partitions.h
|
||||
--- linux-2.6.29-rc3.orig/include/linux/mtd/partitions.h 2009-03-09 05:13:58.000000000 +0100
|
||||
+++ linux-2.6.29-rc3/include/linux/mtd/partitions.h 2009-03-09 18:10:48.000000000 +0100
|
||||
--- a/include/linux/mtd/partitions.h
|
||||
+++ b/include/linux/mtd/partitions.h
|
||||
@@ -34,6 +34,7 @@
|
||||
* erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
|
||||
*/
|
||||
@@ -596,7 +605,7 @@ diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/partitions.h linux-2.6.29-rc3/
|
||||
struct mtd_partition {
|
||||
char *name; /* identifier string */
|
||||
uint64_t size; /* partition size */
|
||||
@@ -41,6 +42,7 @@
|
||||
@@ -41,6 +42,7 @@ struct mtd_partition {
|
||||
uint32_t mask_flags; /* master MTD flags to mask out for this partition */
|
||||
struct nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only)*/
|
||||
struct mtd_info **mtdp; /* pointer to store the MTD object */
|
||||
@@ -604,7 +613,7 @@ diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/partitions.h linux-2.6.29-rc3/
|
||||
};
|
||||
|
||||
#define MTDPART_OFS_NXTBLK (-2)
|
||||
@@ -50,6 +52,7 @@
|
||||
@@ -50,6 +52,7 @@ struct mtd_partition {
|
||||
|
||||
int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
|
||||
int del_mtd_partitions(struct mtd_info *);
|
||||
@@ -612,10 +621,9 @@ diff -ruN linux-2.6.29-rc3.orig/include/linux/mtd/partitions.h linux-2.6.29-rc3/
|
||||
|
||||
/*
|
||||
* Functions dealing with the various ways of partitioning the space
|
||||
diff -ruN linux-2.6.29-rc3.orig/include/mtd/mtd-abi.h linux-2.6.29-rc3/include/mtd/mtd-abi.h
|
||||
--- linux-2.6.29-rc3.orig/include/mtd/mtd-abi.h 2009-03-09 05:13:57.000000000 +0100
|
||||
+++ linux-2.6.29-rc3/include/mtd/mtd-abi.h 2009-03-09 18:10:48.000000000 +0100
|
||||
@@ -93,6 +93,7 @@
|
||||
--- a/include/mtd/mtd-abi.h
|
||||
+++ b/include/mtd/mtd-abi.h
|
||||
@@ -93,6 +93,7 @@ struct otp_info {
|
||||
#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
|
||||
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
|
||||
#define MTDFILEMODE _IO('M', 19)
|
||||
|
||||
Reference in New Issue
Block a user