diff options
author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-04-16 18:31:05 +0000 |
---|---|---|
committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-04-16 18:31:05 +0000 |
commit | b2cab73a788f178bfe2f8620d8c4a483dfba34fc (patch) | |
tree | d0285c3b8b16f40ed39ca88a77e257f6443ecb57 /target/linux/generic/patches-2.6.39/065-rootfs_split.patch | |
parent | 5ed970594e5968204fd460981508316edc4c0298 (diff) |
kernel: reorganize 2.6.39 patches
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26691 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/patches-2.6.39/065-rootfs_split.patch')
-rw-r--r-- | target/linux/generic/patches-2.6.39/065-rootfs_split.patch | 619 |
1 files changed, 0 insertions, 619 deletions
diff --git a/target/linux/generic/patches-2.6.39/065-rootfs_split.patch b/target/linux/generic/patches-2.6.39/065-rootfs_split.patch deleted file mode 100644 index 081a1b4f0..000000000 --- a/target/linux/generic/patches-2.6.39/065-rootfs_split.patch +++ /dev/null @@ -1,619 +0,0 @@ ---- a/drivers/mtd/Kconfig -+++ b/drivers/mtd/Kconfig -@@ -47,6 +47,16 @@ config MTD_PARTITIONS - - if MTD_PARTITIONS - -+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" - ---help--- ---- 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 -@@ -636,6 +638,153 @@ 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; -+ int ret, split_offset = 0; -+ -+ 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=%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 -@@ -652,6 +801,9 @@ int add_mtd_partitions(struct mtd_info * - struct mtd_part *slave; - uint64_t cur_offset = 0; - int i; -+#ifdef CONFIG_MTD_ROOTFS_SPLIT -+ int ret; -+#endif - - printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); - -@@ -666,6 +818,21 @@ 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; - } - -@@ -673,6 +840,32 @@ 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/devices/block2mtd.c -+++ b/drivers/mtd/devices/block2mtd.c -@@ -30,6 +30,8 @@ struct block2mtd_dev { - struct block_device *blkdev; - struct mtd_info mtd; - struct mutex write_mutex; -+ rwlock_t bdev_mutex; -+ char devname[0]; - }; - - -@@ -82,6 +84,12 @@ static int block2mtd_erase(struct mtd_in - size_t len = instr->len; - int err; - -+ read_lock(&dev->bdev_mutex); -+ if (!dev->blkdev) { -+ err = -EINVAL; -+ goto done; -+ } -+ - instr->state = MTD_ERASING; - mutex_lock(&dev->write_mutex); - err = _block2mtd_erase(dev, from, len); -@@ -93,6 +101,10 @@ static int block2mtd_erase(struct mtd_in - instr->state = MTD_ERASE_DONE; - - mtd_erase_callback(instr); -+ -+done: -+ read_unlock(&dev->bdev_mutex); -+ - return err; - } - -@@ -104,10 +116,14 @@ static int block2mtd_read(struct mtd_inf - struct page *page; - int index = from >> PAGE_SHIFT; - int offset = from & (PAGE_SIZE-1); -- int cpylen; -+ int cpylen, err = 0; -+ -+ read_lock(&dev->bdev_mutex); -+ if (!dev->blkdev || (from > mtd->size)) { -+ err = -EINVAL; -+ goto done; -+ } - -- if (from > mtd->size) -- return -EINVAL; - if (from + len > mtd->size) - len = mtd->size - from; - -@@ -122,10 +138,14 @@ static int block2mtd_read(struct mtd_inf - len = len - cpylen; - - page = page_read(dev->blkdev->bd_inode->i_mapping, index); -- if (!page) -- return -ENOMEM; -- if (IS_ERR(page)) -- return PTR_ERR(page); -+ if (!page) { -+ err = -ENOMEM; -+ goto done; -+ } -+ if (IS_ERR(page)) { -+ err = PTR_ERR(page); -+ goto done; -+ } - - memcpy(buf, page_address(page) + offset, cpylen); - page_cache_release(page); -@@ -136,7 +156,10 @@ static int block2mtd_read(struct mtd_inf - offset = 0; - index++; - } -- return 0; -+ -+done: -+ read_unlock(&dev->bdev_mutex); -+ return err; - } - - -@@ -188,12 +211,22 @@ static int block2mtd_write(struct mtd_in - size_t *retlen, const u_char *buf) - { - struct block2mtd_dev *dev = mtd->priv; -- int err; -+ int err = 0; -+ -+ read_lock(&dev->bdev_mutex); -+ if (!dev->blkdev) { -+ err = -EINVAL; -+ goto done; -+ } - - if (!len) -- return 0; -- if (to >= mtd->size) -- return -ENOSPC; -+ goto done; -+ -+ if (to >= mtd->size) { -+ err = -ENOSPC; -+ goto done; -+ } -+ - if (to + len > mtd->size) - len = mtd->size - to; - -@@ -202,6 +235,9 @@ static int block2mtd_write(struct mtd_in - mutex_unlock(&dev->write_mutex); - if (err > 0) - err = 0; -+ -+done: -+ read_unlock(&dev->bdev_mutex); - return err; - } - -@@ -210,33 +246,109 @@ static int block2mtd_write(struct mtd_in - static void block2mtd_sync(struct mtd_info *mtd) - { - struct block2mtd_dev *dev = mtd->priv; -+ read_lock(&dev->bdev_mutex); -+ if (dev->blkdev) - sync_blockdev(dev->blkdev); -+ read_unlock(&dev->bdev_mutex); -+ - return; - } - - -+static int _open_bdev(struct block2mtd_dev *dev) -+{ -+ const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; -+ struct block_device *bdev; -+ -+ /* Get a handle on the device */ -+ bdev = blkdev_get_by_path(dev->devname, mode, dev); -+#ifndef MODULE -+ if (IS_ERR(bdev)) { -+ -+ /* We might not have rootfs mounted at this point. Try -+ to resolve the device name by other means. */ -+ -+ dev_t devt = name_to_dev_t(dev->devname); -+ if (devt) -+ bdev = blkdev_get_by_dev(devt, mode, dev); -+ } -+#endif -+ -+ if (IS_ERR(bdev)) { -+ ERROR("error: cannot open device %s", dev->devname); -+ return 1; -+ } -+ dev->blkdev = bdev; -+ -+ if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) { -+ ERROR("attempting to use an MTD device as a block device"); -+ return 1; -+ } -+ -+ return 0; -+} -+ -+static void _close_bdev(struct block2mtd_dev *dev) -+{ -+ struct block_device *bdev; -+ -+ if (!dev->blkdev) -+ return; -+ -+ bdev = dev->blkdev; -+ invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping, 0, -1); -+ blkdev_put(dev->blkdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); -+ dev->blkdev = NULL; -+} -+ - static void block2mtd_free_device(struct block2mtd_dev *dev) - { - if (!dev) - return; - - kfree(dev->mtd.name); -- -- if (dev->blkdev) { -- invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping, -- 0, -1); -- blkdev_put(dev->blkdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); -- } -- -+ _close_bdev(dev); - kfree(dev); - } - - --/* FIXME: ensure that mtd->size % erase_size == 0 */ --static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname) -+static int block2mtd_refresh(struct mtd_info *mtd) - { -- const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; -+ struct block2mtd_dev *dev = mtd->priv; - struct block_device *bdev; -+ dev_t devt; -+ int err = 0; -+ -+ /* no other mtd function can run at this point */ -+ write_lock(&dev->bdev_mutex); -+ -+ /* get the device number for the whole disk */ -+ devt = MKDEV(MAJOR(dev->blkdev->bd_dev), 0); -+ -+ /* close the old block device */ -+ _close_bdev(dev); -+ -+ /* open the whole disk, issue a partition rescan, then */ -+ bdev = blkdev_get_by_dev(devt, FMODE_WRITE | FMODE_READ); -+ if (!bdev || !bdev->bd_disk) -+ err = -EINVAL; -+#ifndef CONFIG_MTD_BLOCK2MTD_MODULE -+ else -+ err = rescan_partitions(bdev->bd_disk, bdev); -+#endif -+ if (bdev) -+ blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); -+ -+ /* try to open the partition block device again */ -+ _open_bdev(dev); -+ write_unlock(&dev->bdev_mutex); -+ -+ return err; -+} -+ -+/* FIXME: ensure that mtd->size % erase_size == 0 */ -+static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname) -+{ - struct block2mtd_dev *dev; - struct mtd_partition *part; - char *name; -@@ -244,36 +356,17 @@ static struct block2mtd_dev *add_device( - if (!devname) - return NULL; - -- dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL); -+ dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL); - if (!dev) - return NULL; - -- /* Get a handle on the device */ -- bdev = blkdev_get_by_path(devname, mode, dev); --#ifndef MODULE -- if (IS_ERR(bdev)) { -- -- /* We might not have rootfs mounted at this point. Try -- to resolve the device name by other means. */ -+ strcpy(dev->devname, devname); - -- dev_t devt = name_to_dev_t(devname); -- if (devt) -- bdev = blkdev_get_by_dev(devt, mode, dev); -- } --#endif -- -- if (IS_ERR(bdev)) { -- ERROR("error: cannot open device %s", devname); -+ if (_open_bdev(dev)) - goto devinit_err; -- } -- dev->blkdev = bdev; -- -- if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) { -- ERROR("attempting to use an MTD device as a block device"); -- goto devinit_err; -- } - - mutex_init(&dev->write_mutex); -+ rwlock_init(&dev->bdev_mutex); - - /* Setup the MTD structure */ - /* make the name contain the block device in */ -@@ -298,6 +391,7 @@ 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; - - part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL); - part->name = dev->mtd.name; ---- a/drivers/mtd/mtdchar.c -+++ b/drivers/mtd/mtdchar.c -@@ -841,6 +841,13 @@ static int mtd_ioctl(struct file *file, - file->f_pos = 0; - break; - } -+#ifdef CONFIG_MTD_PARTITIONS -+ case MTDREFRESH: -+ { -+ ret = refresh_mtd_partitions(mtd); -+ break; -+ } -+#endif - - case OTPGETREGIONCOUNT: - case OTPGETREGIONINFO: ---- 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; -@@ -277,6 +278,9 @@ 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 */ - 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', 23) - - /* - * Obsolete legacy interface. Keep it in order not to break userspace |