X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/a3df50fd61e049a5827878459d7bf0b9e670f2ba..dabfb71139a2d9698e7f28b20b88d38239f971f0:/target/linux/generic-2.6/patches/060-rootfs_split.patch diff --git a/target/linux/generic-2.6/patches/060-rootfs_split.patch b/target/linux/generic-2.6/patches/060-rootfs_split.patch index 7e4161e8d..adafdaacb 100644 --- a/target/linux/generic-2.6/patches/060-rootfs_split.patch +++ b/target/linux/generic-2.6/patches/060-rootfs_split.patch @@ -1,21 +1,28 @@ -diff -urN linux-2.6.21.1.old/drivers/mtd/Kconfig linux-2.6.21.1.dev/drivers/mtd/Kconfig ---- linux-2.6.21.1.old/drivers/mtd/Kconfig 2007-04-27 23:49:26.000000000 +0200 -+++ linux-2.6.21.1.dev/drivers/mtd/Kconfig 2007-05-26 19:58:42.320520952 +0200 -@@ -49,6 +49,11 @@ +Index: linux/drivers/mtd/Kconfig +=================================================================== +--- linux.orig/drivers/mtd/Kconfig ++++ linux/drivers/mtd/Kconfig +@@ -49,6 +49,16 @@ config MTD_PARTITIONS devices. Partitioning on NFTL 'devices' is a different - that's the 'normal' form of partitioning used on a block device. -+config MTD_SPLIT_ROOTFS -+ bool "Automatically split rootfs partition for squashfs" ++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 -urN linux-2.6.21.1.old/drivers/mtd/mtdpart.c linux-2.6.21.1.dev/drivers/mtd/mtdpart.c ---- linux-2.6.21.1.old/drivers/mtd/mtdpart.c 2007-04-27 23:49:26.000000000 +0200 -+++ linux-2.6.21.1.dev/drivers/mtd/mtdpart.c 2007-05-26 19:58:42.331519280 +0200 +Index: linux/drivers/mtd/mtdpart.c +=================================================================== +--- linux.orig/drivers/mtd/mtdpart.c ++++ linux/drivers/mtd/mtdpart.c @@ -20,6 +20,8 @@ #include #include @@ -25,15 +32,16 @@ diff -urN linux-2.6.21.1.old/drivers/mtd/mtdpart.c linux-2.6.21.1.dev/drivers/mt /* Our partition linked list */ static LIST_HEAD(mtd_partitions); -@@ -308,6 +310,172 @@ +@@ -308,6 +310,266 @@ int del_mtd_partitions(struct mtd_info * return 0; } +static u_int32_t cur_offset = 0; -+static int add_mtd_partition(struct mtd_info *master, const struct mtd_partition *part, int i) ++static int add_one_partition(struct mtd_info *master, const struct mtd_partition *part, ++ int i, struct mtd_part **slp) +{ + struct mtd_part *slave; -+ ++ + /* allocate the partition structure */ + slave = kzalloc (sizeof(*slave), GFP_KERNEL); + if (!slave) { @@ -192,62 +200,118 @@ diff -urN linux-2.6.21.1.old/drivers/mtd/mtdpart.c linux-2.6.21.1.dev/drivers/mt + slave->registered = 1; + } + ++ if (slp) ++ *slp = slave; ++ + return 0; +} ++ ++#ifdef CONFIG_MTD_ROOTFS_SPLIT ++#define ROOTFS_SPLIT_NAME "rootfs_data" ++static int split_squashfs(struct mtd_info *master, struct mtd_partition *old, ++ struct mtd_partition **new) ++{ ++ struct mtd_partition *part = NULL; ++ int len; ++ char buf[512]; ++ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf; ++ int ret; ++ ++ ret = master->read(master, old->offset, sizeof(*sb), &len, buf); ++ if (ret) { ++ printk(KERN_ALERT "split_squashfs: error occured while reading " ++ "from \"%s\"\n", master->name); ++ goto out; ++ } ++ ++ if (len != sizeof(*sb)) { ++ printk(KERN_ALERT "split_squashfs: unable to read superblock " ++ "from \"%s\"\n", master->name); ++ ret=-1; ++ goto out; ++ } ++ ++ if (*((u32 *) buf) != SQUASHFS_MAGIC) { ++ printk(KERN_ALERT "split_squasfs: no squashfs found in \"%s\"\n", ++ master->name); ++ ret=0; ++ goto out; ++ } ++ ++ if (sb->bytes_used <= 0) { ++ printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n", ++ master->name); ++ ret=0; ++ goto out; ++ } ++ ++ part = kmalloc(sizeof(*part)+sizeof(ROOTFS_SPLIT_NAME)+1, GFP_KERNEL); ++ if (part == NULL) { ++ printk(KERN_INFO "split_squashfs: no memory for partition \"%s\"\n", ++ ROOTFS_SPLIT_NAME); ++ ret = -ENOMEM; ++ goto out; ++ } ++ ++ memcpy(part, old, sizeof(*part)); ++ part->name = (unsigned char *)&part[1]; ++ strcpy(part->name, ROOTFS_SPLIT_NAME); ++ ++ len = (u32) sb->bytes_used; ++ len += (part->offset & 0x000fffff); ++ len += (master->erasesize - 1); ++ len &= ~(master->erasesize - 1); ++ len -= (part->offset & 0x000fffff); ++ part->offset += len; ++ part->size -= len; ++ ++ ret = 0; ++ ++out: ++ *new = part; ++ return ret; ++} ++ ++static int split_rootfs_data(struct mtd_info *master, struct mtd_partition *part, ++ int index) ++{ ++ struct mtd_partition *dpart; ++ int ret; ++ ++ ret = split_squashfs(master, part, &dpart); ++ if (ret) ++ return ret; ++ ++ 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); ++ ++ ret = add_one_partition(master, dpart, index, NULL); ++ if (ret) ++ kfree(dpart); ++ ++ return ret; ++} ++#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 -@@ -319,170 +487,53 @@ - const struct mtd_partition *parts, +@@ -320,169 +582,31 @@ int add_mtd_partitions(struct mtd_info * int nbparts) { -- struct mtd_part *slave; + struct mtd_part *slave; - u_int32_t cur_offset = 0; - int i; + struct mtd_partition *part; -+ int i, ret = 0; ++ int i, j, ret = 0; printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); - for (i = 0; i < nbparts; i++) { -+ part = (struct mtd_partition *) &parts[i]; -+ ret = add_mtd_partition(master, part, i); -+ if (ret) -+ return ret; -+ if (strcmp(part->name, "rootfs") == 0) { -+#ifdef CONFIG_MTD_SPLIT_ROOTFS -+ int len; -+ char buf[512]; -+ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf; -+#define ROOTFS_SPLIT_NAME "rootfs_data" -+ if ((master->read(master, part->offset, sizeof(struct squashfs_super_block), &len, buf) == 0) && -+ (len == sizeof(struct squashfs_super_block)) && -+ (*((u32 *) buf) == SQUASHFS_MAGIC) && -+ (sb->bytes_used > 0)) { -+ -+ -+ part = kmalloc(sizeof(struct mtd_partition), GFP_KERNEL); -+ memcpy(part, &parts[i], sizeof(struct mtd_partition)); -+ -+ part->name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL); -+ strcpy(part->name, ROOTFS_SPLIT_NAME); -+ -+ len = (u32) sb->bytes_used; -+ len += (part->offset & 0x000fffff); -+ len += (master->erasesize - 1); -+ len &= ~(master->erasesize - 1); -+ len -= (part->offset & 0x000fffff); -+ part->offset += len; -+ part->size -= len; -+ -+ if (master->erasesize <= part->size) -+ ret = add_mtd_partition(master, part, i + 1); -+ else -+ kfree(part->name); -+ if (ret) -+ return ret; - +- for (i = 0; i < nbparts; i++) { +- - /* allocate the partition structure */ - slave = kzalloc (sizeof(*slave), GFP_KERNEL); - if (!slave) { @@ -326,8 +390,7 @@ diff -urN linux-2.6.21.1.old/drivers/mtd/mtdpart.c linux-2.6.21.1.dev/drivers/mt - printk(KERN_NOTICE "Moving partition %d: " - "0x%08x -> 0x%08x\n", i, - cur_offset, slave->offset); -+ kfree(part); - } +- } - } - if (slave->mtd.size == MTDPART_SIZ_FULL) - slave->mtd.size = master->size - slave->offset; @@ -392,7 +455,20 @@ diff -urN linux-2.6.21.1.old/drivers/mtd/mtdpart.c linux-2.6.21.1.dev/drivers/mt - offs + slave->offset)) - slave->mtd.ecc_stats.badblocks++; - offs += slave->mtd.erasesize; -- } ++ for (i = 0, j = 0; i < nbparts; i++) { ++ part = (struct mtd_partition *) &parts[i]; ++ ret = add_one_partition(master, part, j, &slave); ++ if (ret) ++ return ret; ++ j++; ++ ++ if (strcmp(part->name, "rootfs") == 0 && 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); + } - } - - if(parts[i].mtdp) @@ -405,8 +481,12 @@ diff -urN linux-2.6.21.1.old/drivers/mtd/mtdpart.c linux-2.6.21.1.dev/drivers/mt - /* register our partition */ - add_mtd_device(&slave->mtd); - slave->registered = 1; -+#endif /* CONFIG_MTD_SPLIT_ROOTFS */ -+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, i); ++#endif ++#ifdef CONFIG_MTD_ROOTFS_SPLIT ++ ret = split_rootfs_data(master, part, j); ++ if (ret == 0) ++ j++; ++#endif } }