linux/2.6.31: R.I.P.

SVN-Revision: 31412

1 files changed, 0 insertions, 627 deletions

diff --git a/target/linux/generic/patches-2.6.31/065-rootfs_split.patch b/target/linux/generic/patches-2.6.31/065-rootfs_split.patch
deleted file mode 100644
index c585775332..0000000000
--- a/target/linux/generic/patches-2.6.31/065-rootfs_split.patch
+++ /dev/null
@@ -1,627 +0,0 @@
---- a/drivers/mtd/Kconfig
-+++ b/drivers/mtd/Kconfig
-@@ -53,6 +53,16 @@ config MTD_TESTS
- 	  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
---- a/drivers/mtd/mtdpart.c
-+++ b/drivers/mtd/mtdpart.c
-@@ -18,6 +18,8 @@
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/partitions.h>
- #include <linux/mtd/compatmac.h>
-+#include <linux/root_dev.h>
-+#include <linux/magic.h>
- 
- /* Our partition linked list */
- static LIST_HEAD(mtd_partitions);
-@@ -35,7 +37,7 @@ 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
-@@ -502,6 +504,152 @@ out_register:
- 	return slave;
- }
- 
-+#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 split_offset = 0;
-+	int ret;
-+
-+	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));
-+	dpart->name = (unsigned char *)&dpart[1];
-+	strcpy(dpart->name, ROOTFS_SPLIT_NAME);
-+
-+	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 = add_one_partition(master, dpart, 0, 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;
-+
-+		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
-@@ -517,7 +665,7 @@ 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);
- 
-@@ -525,6 +673,21 @@ int add_mtd_partitions(struct mtd_info *
- 		slave = add_one_partition(master, parts + i, i, cur_offset);
- 		if (!slave)
- 			return -ENOMEM;
-+
-+		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;
- 	}
- 
-@@ -532,6 +695,32 @@ 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
-@@ -29,6 +29,8 @@ struct block2mtd_dev {
- 	struct block_device *blkdev;
- 	struct mtd_info mtd;
- 	struct mutex write_mutex;
-+	rwlock_t bdev_mutex;
-+	char devname[0];
- };
- 
- 
-@@ -81,6 +83,12 @@ 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;
- }
- 
-@@ -210,52 +246,29 @@ static int block2mtd_write(struct mtd_in
- static void block2mtd_sync(struct mtd_info *mtd)
- {
- 	struct block2mtd_dev *dev = mtd->priv;
--	sync_blockdev(dev->blkdev);
--	return;
--}
--
--
--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);
--		close_bdev_exclusive(dev->blkdev, FMODE_READ|FMODE_WRITE);
--	}
-+	read_lock(&dev->bdev_mutex);
-+	if (dev->blkdev)
-+		sync_blockdev(dev->blkdev);
-+	read_unlock(&dev->bdev_mutex);
- 
--	kfree(dev);
-+	return;
- }
- 
- 
--/* FIXME: ensure that mtd->size % erase_size == 0 */
--static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
-+static int _open_bdev(struct block2mtd_dev *dev)
- {
- 	struct block_device *bdev;
--	struct block2mtd_dev *dev;
--	struct mtd_partition *part;
--	char *name;
--
--	if (!devname)
--		return NULL;
--
--	dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL);
--	if (!dev)
--		return NULL;
- 
- 	/* Get a handle on the device */
--	bdev = open_bdev_exclusive(devname, FMODE_READ|FMODE_WRITE, NULL);
-+	bdev = open_bdev_exclusive(dev->devname, FMODE_READ|FMODE_WRITE, NULL);
- #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(devname);
-+		dev_t devt = name_to_dev_t(dev->devname);
- 		if (devt) {
- 			bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ);
- 		}
-@@ -263,17 +276,98 @@ static struct block2mtd_dev *add_device(
- #endif
- 
- 	if (IS_ERR(bdev)) {
--		ERROR("error: cannot open device %s", devname);
--		goto devinit_err;
-+		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");
--		goto devinit_err;
-+		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);
-+	close_bdev_exclusive(dev->blkdev, FMODE_READ|FMODE_WRITE);
-+	dev->blkdev = NULL;
-+}
-+
-+static void block2mtd_free_device(struct block2mtd_dev *dev)
-+{
-+	if (!dev)
-+		return;
-+
-+	kfree(dev->mtd.name);
-+	_close_bdev(dev);
-+	kfree(dev);
-+}
-+
-+
-+static int block2mtd_refresh(struct mtd_info *mtd)
-+{
-+	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 = open_by_devnum(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)
-+		close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
-+
-+	/* 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;
-+
-+	if (!devname)
-+		return NULL;
-+
-+	dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL);
-+	if (!dev)
-+		return NULL;
-+
-+	strcpy(dev->devname, devname);
-+
-+	if (_open_bdev(dev))
-+		goto devinit_err;
-+
- 	mutex_init(&dev->write_mutex);
-+	rwlock_init(&dev->bdev_mutex);
- 
- 	if (!mtdname)
- 		mtdname = devname;
-@@ -297,6 +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
-@@ -18,6 +18,7 @@
- 
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/compatmac.h>
-+#include <linux/mtd/partitions.h>
- 
- #include <asm/uaccess.h>
- 
-@@ -814,6 +815,13 @@ static int mtd_ioctl(struct inode *inode
- 		file->f_pos = 0;
- 		break;
- 	}
-+#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
-@@ -101,6 +101,7 @@ struct mtd_oob_ops {
- 	uint8_t		*oobbuf;
- };
- 
-+struct mtd_info;
- struct mtd_info {
- 	u_char type;
- 	uint32_t flags;
-@@ -241,6 +242,9 @@ 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
-@@ -110,6 +110,7 @@ struct otp_info {
- #define MEMERASE64		_IOW('M', 20, struct erase_info_user64)
- #define MEMWRITEOOB64		_IOWR('M', 21, struct mtd_oob_buf64)
- #define MEMREADOOB64		_IOWR('M', 22, struct mtd_oob_buf64)
-+#define MTDREFRESH		_IO('M', 50)
- 
- /*
-  * Obsolete legacy interface. Keep it in order not to break userspace