linux/3.0: R.I.P.

It is used by the broken omap35xx/gumstix target only.

SVN-Revision: 31717

1 files changed, 0 insertions, 327 deletions

diff --git a/target/linux/generic/patches-3.0/400-rootfs_split.patch b/target/linux/generic/patches-3.0/400-rootfs_split.patch
deleted file mode 100644
index 9eb05c4af6..0000000000
--- a/target/linux/generic/patches-3.0/400-rootfs_split.patch
+++ /dev/null
@@ -1,327 +0,0 @@
---- a/drivers/mtd/Kconfig
-+++ b/drivers/mtd/Kconfig
-@@ -33,6 +33,14 @@ 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"
-+	default y
-+
-+config MTD_ROOTFS_SPLIT
-+	bool "Automatically split 'rootfs' partition for squashfs"
-+	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>
- 
- #include "mtdcore.h"
-@@ -50,7 +52,7 @@ 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
-@@ -637,6 +639,155 @@ 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));
-+	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 = 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
-@@ -653,6 +804,9 @@ 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);
- 
-@@ -667,12 +821,53 @@ 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;
- 	}
- 
- 	return 0;
- }
- 
-+int mtd_device_refresh(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(mtd_device_refresh);
-+
- static DEFINE_SPINLOCK(part_parser_lock);
- static LIST_HEAD(part_parsers);
- 
---- a/drivers/mtd/mtdchar.c
-+++ b/drivers/mtd/mtdchar.c
-@@ -949,6 +949,12 @@ static int mtd_ioctl(struct file *file,
- 		break;
- 	}
- 
-+	case MTDREFRESH:
-+	{
-+		ret = mtd_device_refresh(mtd);
-+		break;
-+	}
-+
- 	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;
-@@ -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
-@@ -327,6 +331,7 @@ struct mtd_partition;
- extern int mtd_device_register(struct mtd_info *master,
- 			       const struct mtd_partition *parts,
- 			       int nr_parts);
-+extern int mtd_device_refresh(struct mtd_info *master);
- extern int mtd_device_unregister(struct mtd_info *master);
- extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num);
- extern int __get_mtd_device(struct mtd_info *mtd);
---- 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)
---- 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