+++ /dev/null
-Index: linux/drivers/mtd/Kconfig
-===================================================================
---- linux.orig/drivers/mtd/Kconfig
-+++ linux/drivers/mtd/Kconfig
-@@ -47,6 +47,16 @@ 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
-Index: linux/drivers/mtd/mtdpart.c
-===================================================================
---- linux.orig/drivers/mtd/mtdpart.c
-+++ linux/drivers/mtd/mtdpart.c
-@@ -20,6 +20,8 @@
- #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);
-@@ -308,6 +310,265 @@ int del_mtd_partitions(struct mtd_info *
- return 0;
- }
-
-+static u_int32_t cur_offset = 0;
-+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) {
-+ printk ("memory allocation error while creating partitions for \"%s\"\n",
-+ master->name);
-+ del_mtd_partitions(master);
-+ return -ENOMEM;
-+ }
-+ list_add(&slave->list, &mtd_partitions);
-+
-+ /* set up the MTD object for this partition */
-+ slave->mtd.type = master->type;
-+ slave->mtd.flags = master->flags & ~part->mask_flags;
-+ slave->mtd.size = part->size;
-+ slave->mtd.writesize = master->writesize;
-+ slave->mtd.oobsize = master->oobsize;
-+ slave->mtd.oobavail = master->oobavail;
-+ slave->mtd.subpage_sft = master->subpage_sft;
-+
-+ slave->mtd.name = part->name;
-+ slave->mtd.owner = master->owner;
-+
-+ slave->mtd.read = part_read;
-+ slave->mtd.write = part_write;
-+
-+ if(master->point && master->unpoint){
-+ slave->mtd.point = part_point;
-+ slave->mtd.unpoint = part_unpoint;
-+ }
-+
-+ if (master->read_oob)
-+ slave->mtd.read_oob = part_read_oob;
-+ if (master->write_oob)
-+ slave->mtd.write_oob = part_write_oob;
-+ if(master->read_user_prot_reg)
-+ slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
-+ if(master->read_fact_prot_reg)
-+ slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
-+ if(master->write_user_prot_reg)
-+ slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
-+ if(master->lock_user_prot_reg)
-+ slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
-+ if(master->get_user_prot_info)
-+ slave->mtd.get_user_prot_info = part_get_user_prot_info;
-+ if(master->get_fact_prot_info)
-+ slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
-+ if (master->sync)
-+ slave->mtd.sync = part_sync;
-+ if (!i && master->suspend && master->resume) {
-+ slave->mtd.suspend = part_suspend;
-+ slave->mtd.resume = part_resume;
-+ }
-+ if (master->writev)
-+ slave->mtd.writev = part_writev;
-+ if (master->lock)
-+ slave->mtd.lock = part_lock;
-+ if (master->unlock)
-+ slave->mtd.unlock = part_unlock;
-+ if (master->block_isbad)
-+ slave->mtd.block_isbad = part_block_isbad;
-+ if (master->block_markbad)
-+ slave->mtd.block_markbad = part_block_markbad;
-+ slave->mtd.erase = part_erase;
-+ slave->master = master;
-+ slave->offset = part->offset;
-+ slave->index = i;
-+
-+ if (slave->offset == MTDPART_OFS_APPEND)
-+ slave->offset = cur_offset;
-+ if (slave->offset == MTDPART_OFS_NXTBLK) {
-+ slave->offset = cur_offset;
-+ if ((cur_offset % master->erasesize) != 0) {
-+ /* Round up to next erasesize */
-+ slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
-+ printk(KERN_NOTICE "Moving partition %d: "
-+ "0x%08x -> 0x%08x\n", i,
-+ cur_offset, slave->offset);
-+ }
-+ }
-+ if (slave->mtd.size == MTDPART_SIZ_FULL)
-+ slave->mtd.size = master->size - slave->offset;
-+ cur_offset = slave->offset + slave->mtd.size;
-+
-+ printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
-+ slave->offset + slave->mtd.size, slave->mtd.name);
-+
-+ /* let's do some sanity checks */
-+ if (slave->offset >= master->size) {
-+ /* let's register it anyway to preserve ordering */
-+ slave->offset = 0;
-+ slave->mtd.size = 0;
-+ printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
-+ part->name);
-+ }
-+ if (slave->offset + slave->mtd.size > master->size) {
-+ slave->mtd.size = master->size - slave->offset;
-+ printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
-+ part->name, master->name, slave->mtd.size);
-+ }
-+ if (master->numeraseregions>1) {
-+ /* Deal with variable erase size stuff */
-+ int i;
-+ struct mtd_erase_region_info *regions = master->eraseregions;
-+
-+ /* Find the first erase regions which is part of this partition. */
-+ for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
-+ ;
-+
-+ for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
-+ if (slave->mtd.erasesize < regions[i].erasesize) {
-+ slave->mtd.erasesize = regions[i].erasesize;
-+ }
-+ }
-+ } else {
-+ /* Single erase size */
-+ slave->mtd.erasesize = master->erasesize;
-+ }
-+
-+ if ((slave->mtd.flags & MTD_WRITEABLE) &&
-+ (slave->offset % slave->mtd.erasesize)) {
-+ /* Doesn't start on a boundary of major erase size */
-+ /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
-+ slave->mtd.flags &= ~MTD_WRITEABLE;
-+ printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
-+ part->name);
-+ }
-+ if ((slave->mtd.flags & MTD_WRITEABLE) &&
-+ (slave->mtd.size % slave->mtd.erasesize)) {
-+ slave->mtd.flags &= ~MTD_WRITEABLE;
-+ printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
-+ part->name);
-+ }
-+
-+ slave->mtd.ecclayout = master->ecclayout;
-+ if (master->block_isbad) {
-+ uint32_t offs = 0;
-+
-+ while(offs < slave->mtd.size) {
-+ if (master->block_isbad(master,
-+ offs + slave->offset))
-+ slave->mtd.ecc_stats.badblocks++;
-+ offs += slave->mtd.erasesize;
-+ }
-+ }
-+
-+ if(part->mtdp)
-+ { /* store the object pointer (caller may or may not register it */
-+ *part->mtdp = &slave->mtd;
-+ slave->registered = 0;
-+ }
-+ else
-+ {
-+ /* register our partition */
-+ add_mtd_device(&slave->mtd);
-+ 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
-@@ -320,168 +581,31 @@ int add_mtd_partitions(struct mtd_info *
- int nbparts)
- {
- struct mtd_part *slave;
-- u_int32_t cur_offset = 0;
-- int i;
-+ struct mtd_partition *part;
-+ int i, j, ret = 0;
-
- printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
-
-- for (i = 0; i < nbparts; i++) {
--
-- /* allocate the partition structure */
-- slave = kzalloc (sizeof(*slave), GFP_KERNEL);
-- if (!slave) {
-- printk ("memory allocation error while creating partitions for \"%s\"\n",
-- master->name);
-- del_mtd_partitions(master);
-- return -ENOMEM;
-- }
-- list_add(&slave->list, &mtd_partitions);
--
-- /* set up the MTD object for this partition */
-- slave->mtd.type = master->type;
-- slave->mtd.flags = master->flags & ~parts[i].mask_flags;
-- slave->mtd.size = parts[i].size;
-- slave->mtd.writesize = master->writesize;
-- slave->mtd.oobsize = master->oobsize;
-- slave->mtd.oobavail = master->oobavail;
-- slave->mtd.subpage_sft = master->subpage_sft;
--
-- slave->mtd.name = parts[i].name;
-- slave->mtd.owner = master->owner;
--
-- slave->mtd.read = part_read;
-- slave->mtd.write = part_write;
--
-- if(master->point && master->unpoint){
-- slave->mtd.point = part_point;
-- slave->mtd.unpoint = part_unpoint;
-- }
--
-- if (master->read_oob)
-- slave->mtd.read_oob = part_read_oob;
-- if (master->write_oob)
-- slave->mtd.write_oob = part_write_oob;
-- if(master->read_user_prot_reg)
-- slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
-- if(master->read_fact_prot_reg)
-- slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
-- if(master->write_user_prot_reg)
-- slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
-- if(master->lock_user_prot_reg)
-- slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
-- if(master->get_user_prot_info)
-- slave->mtd.get_user_prot_info = part_get_user_prot_info;
-- if(master->get_fact_prot_info)
-- slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
-- if (master->sync)
-- slave->mtd.sync = part_sync;
-- if (!i && master->suspend && master->resume) {
-- slave->mtd.suspend = part_suspend;
-- slave->mtd.resume = part_resume;
-- }
-- if (master->writev)
-- slave->mtd.writev = part_writev;
-- if (master->lock)
-- slave->mtd.lock = part_lock;
-- if (master->unlock)
-- slave->mtd.unlock = part_unlock;
-- if (master->block_isbad)
-- slave->mtd.block_isbad = part_block_isbad;
-- if (master->block_markbad)
-- slave->mtd.block_markbad = part_block_markbad;
-- slave->mtd.erase = part_erase;
-- slave->master = master;
-- slave->offset = parts[i].offset;
-- slave->index = i;
--
-- if (slave->offset == MTDPART_OFS_APPEND)
-- slave->offset = cur_offset;
-- if (slave->offset == MTDPART_OFS_NXTBLK) {
-- slave->offset = cur_offset;
-- if ((cur_offset % master->erasesize) != 0) {
-- /* Round up to next erasesize */
-- slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
-- printk(KERN_NOTICE "Moving partition %d: "
-- "0x%08x -> 0x%08x\n", i,
-- cur_offset, slave->offset);
-- }
-- }
-- if (slave->mtd.size == MTDPART_SIZ_FULL)
-- slave->mtd.size = master->size - slave->offset;
-- cur_offset = slave->offset + slave->mtd.size;
--
-- printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
-- slave->offset + slave->mtd.size, slave->mtd.name);
--
-- /* let's do some sanity checks */
-- if (slave->offset >= master->size) {
-- /* let's register it anyway to preserve ordering */
-- slave->offset = 0;
-- slave->mtd.size = 0;
-- printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
-- parts[i].name);
-- }
-- if (slave->offset + slave->mtd.size > master->size) {
-- slave->mtd.size = master->size - slave->offset;
-- printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
-- parts[i].name, master->name, slave->mtd.size);
-- }
-- if (master->numeraseregions>1) {
-- /* Deal with variable erase size stuff */
-- int i;
-- struct mtd_erase_region_info *regions = master->eraseregions;
--
-- /* Find the first erase regions which is part of this partition. */
-- for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
-- ;
--
-- for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
-- if (slave->mtd.erasesize < regions[i].erasesize) {
-- slave->mtd.erasesize = regions[i].erasesize;
-- }
-- }
-- } else {
-- /* Single erase size */
-- slave->mtd.erasesize = master->erasesize;
-- }
--
-- if ((slave->mtd.flags & MTD_WRITEABLE) &&
-- (slave->offset % slave->mtd.erasesize)) {
-- /* Doesn't start on a boundary of major erase size */
-- /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
-- slave->mtd.flags &= ~MTD_WRITEABLE;
-- printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
-- parts[i].name);
-- }
-- if ((slave->mtd.flags & MTD_WRITEABLE) &&
-- (slave->mtd.size % slave->mtd.erasesize)) {
-- slave->mtd.flags &= ~MTD_WRITEABLE;
-- printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
-- parts[i].name);
-- }
--
-- slave->mtd.ecclayout = master->ecclayout;
-- if (master->block_isbad) {
-- uint32_t offs = 0;
--
-- while(offs < slave->mtd.size) {
-- if (master->block_isbad(master,
-- 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)
-- { /* store the object pointer (caller may or may not register it */
-- *parts[i].mtdp = &slave->mtd;
-- slave->registered = 0;
-- }
-- else
-- {
-- /* register our partition */
-- add_mtd_device(&slave->mtd);
-- slave->registered = 1;
-+#endif
-+#ifdef CONFIG_MTD_ROOTFS_SPLIT
-+ ret = split_rootfs_data(master, part, j);
-+ if (ret == 0)
-+ j++;
-+#endif
- }
- }
-
projects / openwrt.git / blobdiff