mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-11 21:12:28 +02:00
a50e0e7076
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34247 3c298f89-4303-0410-b956-a3cf2f4a3e73
328 lines
9.0 KiB
Diff
328 lines
9.0 KiB
Diff
--- a/drivers/mtd/Kconfig
|
|
+++ b/drivers/mtd/Kconfig
|
|
@@ -23,6 +23,14 @@ config MTD_TESTS
|
|
WARNING: some of the tests will ERASE entire MTD device which they
|
|
test. Do not use these tests unless you really know what you do.
|
|
|
|
+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
|
|
@@ -613,6 +615,155 @@ 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 = mtd_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
|
|
@@ -629,6 +780,9 @@ 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);
|
|
|
|
@@ -643,12 +797,53 @@ 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
|
|
@@ -1012,6 +1012,12 @@ static int mtdchar_ioctl(struct file *fi
|
|
break;
|
|
}
|
|
|
|
+ case MTDREFRESH:
|
|
+ {
|
|
+ ret = mtd_device_refresh(mtd);
|
|
+ break;
|
|
+ }
|
|
+
|
|
default:
|
|
ret = -ENOTTY;
|
|
}
|
|
--- a/include/linux/mtd/mtd.h
|
|
+++ b/include/linux/mtd/mtd.h
|
|
@@ -114,6 +114,7 @@ struct nand_ecclayout {
|
|
|
|
struct module; /* only needed for owner field in mtd_info */
|
|
|
|
+struct mtd_info;
|
|
struct mtd_info {
|
|
u_char type;
|
|
uint32_t flags;
|
|
@@ -226,6 +227,9 @@ struct mtd_info {
|
|
int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
|
|
int (*_suspend) (struct mtd_info *mtd);
|
|
void (*_resume) (struct mtd_info *mtd);
|
|
+ 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.
|
|
@@ -368,6 +372,7 @@ extern int mtd_device_parse_register(str
|
|
int defnr_parts);
|
|
#define mtd_device_register(master, parts, nr_parts) \
|
|
mtd_device_parse_register(master, NULL, NULL, parts, 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
|
|
@@ -36,12 +36,14 @@
|
|
* 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_RETAIN (-3)
|
|
--- a/include/uapi/mtd/mtd-abi.h
|
|
+++ b/include/uapi/mtd/mtd-abi.h
|
|
@@ -202,6 +202,7 @@ struct otp_info {
|
|
* without OOB, e.g., NOR flash.
|
|
*/
|
|
#define MEMWRITE _IOWR('M', 24, struct mtd_write_req)
|
|
+#define MTDREFRESH _IO('M', 50)
|
|
|
|
/*
|
|
* Obsolete legacy interface. Keep it in order not to break userspace
|