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Diffstat (limited to 'target/linux/generic/patches-2.6.37/400-rootfs_split.patch')
-rw-r--r--target/linux/generic/patches-2.6.37/400-rootfs_split.patch331
1 files changed, 0 insertions, 331 deletions
diff --git a/target/linux/generic/patches-2.6.37/400-rootfs_split.patch b/target/linux/generic/patches-2.6.37/400-rootfs_split.patch
deleted file mode 100644
index 0eeef62..0000000
--- a/target/linux/generic/patches-2.6.37/400-rootfs_split.patch
+++ /dev/null
@@ -1,331 +0,0 @@
---- a/drivers/mtd/Kconfig
-+++ b/drivers/mtd/Kconfig
-@@ -53,6 +53,16 @@ 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_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
---- a/drivers/mtd/mtdpart.c
-+++ b/drivers/mtd/mtdpart.c
-@@ -29,6 +29,8 @@
- #include <linux/kmod.h>
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/partitions.h>
-+#include <linux/root_dev.h>
-+#include <linux/magic.h>
- #include <linux/err.h>
-
- /* Our partition linked list */
-@@ -48,7 +50,7 @@ struct mtd_part {
- * 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
-@@ -618,6 +620,155 @@ int mtd_del_partition(struct mtd_info *m
- }
- EXPORT_SYMBOL_GPL(mtd_del_partition);
-
-+#ifdef CONFIG_MTD_ROOTFS_SPLIT
-+#define ROOTFS_SPLIT_NAME "rootfs_data"
-+#define ROOTFS_REMOVED_NAME "<removed>"
-+
-+struct squashfs_super_block {
-+ __le32 s_magic;
-+ __le32 pad0[9];
-+ __le64 bytes_used;
-+};
-+
-+
-+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
-+{
-+ struct squashfs_super_block sb;
-+ int len, ret;
-+
-+ ret = master->read(master, offset, sizeof(sb), &len, (void *) &sb);
-+ if (ret || (len != sizeof(sb))) {
-+ printk(KERN_ALERT "split_squashfs: error occured while reading "
-+ "from \"%s\"\n", master->name);
-+ return -EINVAL;
-+ }
-+
-+ if (SQUASHFS_MAGIC != le32_to_cpu(sb.s_magic) ) {
-+ printk(KERN_ALERT "split_squashfs: no squashfs found in \"%s\"\n",
-+ master->name);
-+ *split_offset = 0;
-+ return 0;
-+ }
-+
-+ if (le64_to_cpu((sb.bytes_used)) <= 0) {
-+ printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
-+ master->name);
-+ *split_offset = 0;
-+ return 0;
-+ }
-+
-+ len = (u32) le64_to_cpu(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)
-+{
-+ struct mtd_partition *dpart;
-+ struct mtd_part *slave = NULL;
-+ struct mtd_part *spart;
-+ int ret, split_offset = 0;
-+
-+ spart = PART(rpart);
-+ ret = split_squashfs(master, spart->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));
-+ strcpy((char *)&dpart[1], ROOTFS_SPLIT_NAME);
-+ dpart->name = (unsigned char *)&dpart[1];
-+
-+ dpart->size = rpart->size - (split_offset - spart->offset);
-+ dpart->offset = split_offset;
-+
-+ if (dpart == NULL)
-+ return 1;
-+
-+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=%llX, len=%llX \n",
-+ ROOTFS_SPLIT_NAME, dpart->offset, dpart->size);
-+
-+ slave = allocate_partition(master, dpart, 0, split_offset);
-+ if (IS_ERR(slave))
-+ return PTR_ERR(slave);
-+ mutex_lock(&mtd_partitions_mutex);
-+ list_add(&slave->list, &mtd_partitions);
-+ mutex_unlock(&mtd_partitions_mutex);
-+
-+ add_mtd_device(&slave->mtd);
-+
-+ 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;
-+
-+ return split_rootfs_data(part->master, &part->mtd, &tpart);
-+ } 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"),
-+ (u32) part->offset, (u32) 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
-@@ -633,7 +784,7 @@ int add_mtd_partitions(struct mtd_info *
- {
- struct mtd_part *slave;
- uint64_t cur_offset = 0;
-- int i;
-+ int i, ret;
-
- printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
-
-@@ -648,6 +799,21 @@ int add_mtd_partitions(struct mtd_info *
-
- add_mtd_device(&slave->mtd);
-
-+ if (!strcmp(parts[i].name, "rootfs")) {
-+#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]);
-+ /* if (ret == 0)
-+ * j++; */
-+#endif
-+ }
-+
- cur_offset = slave->offset + slave->mtd.size;
- }
-
-@@ -655,6 +821,32 @@ int add_mtd_partitions(struct mtd_info *
- }
- 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);
-
---- a/drivers/mtd/mtdchar.c
-+++ b/drivers/mtd/mtdchar.c
-@@ -956,6 +956,13 @@ static int mtd_ioctl(struct file *file,
- break;
- }
- #endif
-+#ifdef CONFIG_MTD_PARTITIONS
-+ case MTDREFRESH:
-+ {
-+ ret = refresh_mtd_partitions(mtd);
-+ break;
-+ }
-+#endif
-
- default:
- ret = -ENOTTY;
---- a/include/linux/mtd/mtd.h
-+++ b/include/linux/mtd/mtd.h
-@@ -125,6 +125,7 @@ struct nand_ecclayout {
- struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES_LARGE];
- };
-
-+struct mtd_info;
- struct mtd_info {
- u_char type;
- uint32_t flags;
-@@ -266,6 +267,9 @@ struct mtd_info {
- struct device dev;
- int usecount;
-
-+ int (*refresh_device)(struct mtd_info *mtd);
-+ struct mtd_info *split;
-+
- /* 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
---- a/include/linux/mtd/partitions.h
-+++ b/include/linux/mtd/partitions.h
-@@ -34,12 +34,14 @@
- * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
- */
-
-+struct mtd_partition;
- struct mtd_partition {
-- char *name; /* identifier string */
-+ const char *name; /* identifier string */
- uint64_t size; /* partition size */
- uint64_t offset; /* offset within the master MTD space */
- 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) */
-+ int (*refresh_partition)(struct mtd_info *);
- };
-
- #define MTDPART_OFS_NXTBLK (-2)
-@@ -51,6 +53,7 @@ struct mtd_info;
-
- int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
- int del_mtd_partitions(struct mtd_info *);
-+int refresh_mtd_partitions(struct mtd_info *);
-
- /*
- * Functions dealing with the various ways of partitioning the space
---- a/include/mtd/mtd-abi.h
-+++ b/include/mtd/mtd-abi.h
-@@ -127,6 +127,7 @@ struct otp_info {
- #define MEMWRITEOOB64 _IOWR('M', 21, struct mtd_oob_buf64)
- #define MEMREADOOB64 _IOWR('M', 22, struct mtd_oob_buf64)
- #define MEMISLOCKED _IOR('M', 23, struct erase_info_user)
-+#define MTDREFRESH _IO('M', 50)
-
- /*
- * Obsolete legacy interface. Keep it in order not to break userspace