add refresh ioctl to mtd (for rescanning partitions after reflash)
SVN-Revision: 8438
This commit is contained in:
Felix Fietkau
parent
92cd647b8b
commit
4460bbca47
2 changed files with 537 additions and 68 deletions
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@ -1,8 +1,8 @@
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Index: linux/drivers/mtd/Kconfig
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Index: linux-2.6.22.1/drivers/mtd/Kconfig
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===================================================================
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--- linux.orig/drivers/mtd/Kconfig
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+++ linux/drivers/mtd/Kconfig
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@@ -47,6 +47,16 @@ config MTD_PARTITIONS
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--- linux-2.6.22.1.orig/drivers/mtd/Kconfig 2007-08-19 23:30:07.068115074 +0200
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+++ linux-2.6.22.1/drivers/mtd/Kconfig 2007-08-19 23:31:43.961636725 +0200
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@@ -47,6 +47,16 @@
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devices. Partitioning on NFTL 'devices' is a different - that's the
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'normal' form of partitioning used on a block device.
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@ -19,10 +19,10 @@ Index: linux/drivers/mtd/Kconfig
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config MTD_REDBOOT_PARTS
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tristate "RedBoot partition table parsing"
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depends on MTD_PARTITIONS
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Index: linux/drivers/mtd/mtdpart.c
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Index: linux-2.6.22.1/drivers/mtd/mtdpart.c
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===================================================================
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--- linux.orig/drivers/mtd/mtdpart.c
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+++ linux/drivers/mtd/mtdpart.c
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--- linux-2.6.22.1.orig/drivers/mtd/mtdpart.c 2007-08-19 23:30:07.076115531 +0200
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+++ linux-2.6.22.1/drivers/mtd/mtdpart.c 2007-08-19 23:31:44.065642653 +0200
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@@ -20,6 +20,8 @@
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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@ -32,7 +32,16 @@ Index: linux/drivers/mtd/mtdpart.c
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/* Our partition linked list */
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static LIST_HEAD(mtd_partitions);
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@@ -308,6 +310,265 @@ int del_mtd_partitions(struct mtd_info *
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@@ -39,7 +41,7 @@
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* the pointer to that structure with this macro.
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*/
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#define PART(x) ((struct mtd_part *)(x))
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-
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+#define IS_PART(mtd) (mtd->read == part_read)
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/*
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* MTD methods which simply translate the effective address and pass through
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@@ -308,6 +310,312 @@
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return 0;
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}
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@ -66,6 +75,7 @@ Index: linux/drivers/mtd/mtdpart.c
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+
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+ slave->mtd.read = part_read;
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+ slave->mtd.write = part_write;
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+ slave->mtd.refresh_device = part->refresh_partition;
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+
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+ if(master->point && master->unpoint){
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+ slave->mtd.point = part_point;
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@ -207,98 +217,144 @@ Index: linux/drivers/mtd/mtdpart.c
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+
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+#ifdef CONFIG_MTD_ROOTFS_SPLIT
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+#define ROOTFS_SPLIT_NAME "rootfs_data"
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+static int split_squashfs(struct mtd_info *master, struct mtd_partition *old,
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+ struct mtd_partition **new)
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+#define ROOTFS_REMOVED_NAME "<removed>"
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+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
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+{
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+ struct mtd_partition *part = NULL;
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+ int len;
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+ char buf[512];
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+ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
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+ int ret;
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+ int len, ret;
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+
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+ ret = master->read(master, old->offset, sizeof(*sb), &len, buf);
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+ if (ret) {
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+ ret = master->read(master, offset, sizeof(*sb), &len, buf);
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+ if (ret || (len != sizeof(*sb))) {
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+ printk(KERN_ALERT "split_squashfs: error occured while reading "
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+ "from \"%s\"\n", master->name);
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+ goto out;
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+ }
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+
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+ if (len != sizeof(*sb)) {
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+ printk(KERN_ALERT "split_squashfs: unable to read superblock "
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+ "from \"%s\"\n", master->name);
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+ ret=-1;
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+ goto out;
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+ return -EINVAL;
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+ }
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+
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+ if (*((u32 *) buf) != SQUASHFS_MAGIC) {
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+ printk(KERN_ALERT "split_squasfs: no squashfs found in \"%s\"\n",
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+ master->name);
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+ ret=0;
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+ goto out;
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+ *split_offset = 0;
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+ return 0;
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+ }
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+
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+ if (sb->bytes_used <= 0) {
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+ printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
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+ master->name);
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+ ret=0;
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+ goto out;
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+ *split_offset = 0;
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+ return 0;
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+ }
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+
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+ part = kmalloc(sizeof(*part)+sizeof(ROOTFS_SPLIT_NAME)+1, GFP_KERNEL);
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+ if (part == NULL) {
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+ printk(KERN_INFO "split_squashfs: no memory for partition \"%s\"\n",
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+ ROOTFS_SPLIT_NAME);
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+ ret = -ENOMEM;
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+ goto out;
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+ }
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+
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+ memcpy(part, old, sizeof(*part));
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+ part->name = (unsigned char *)&part[1];
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+ strcpy(part->name, ROOTFS_SPLIT_NAME);
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+
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+ len = (u32) sb->bytes_used;
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+ len += (part->offset & 0x000fffff);
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+ len += (offset & 0x000fffff);
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+ len += (master->erasesize - 1);
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+ len &= ~(master->erasesize - 1);
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+ len -= (part->offset & 0x000fffff);
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+ part->offset += len;
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+ part->size -= len;
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+ len -= (offset & 0x000fffff);
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+ *split_offset = offset + len;
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+
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+ ret = 0;
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+
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+out:
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+ *new = part;
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+ return ret;
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+ return 0;
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+}
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+
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+static int split_rootfs_data(struct mtd_info *master, struct mtd_partition *part,
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+static int split_rootfs_data(struct mtd_info *master, struct mtd_info *rpart, struct mtd_partition *part,
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+ int index)
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+{
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+ struct mtd_partition *dpart;
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+ struct mtd_part *slave = NULL;
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+ int split_offset = 0;
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+ int ret;
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+
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+ ret = split_squashfs(master, part, &dpart);
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+ ret = split_squashfs(master, part->offset, &split_offset);
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+ if (ret)
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+ return ret;
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+
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+ if (split_offset <= 0)
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+ return 0;
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+
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+ dpart = kmalloc(sizeof(*part)+sizeof(ROOTFS_SPLIT_NAME)+1, GFP_KERNEL);
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+ if (dpart == NULL) {
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+ printk(KERN_INFO "split_squashfs: no memory for partition \"%s\"\n",
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+ ROOTFS_SPLIT_NAME);
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+ return -ENOMEM;
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+ }
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+
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+ memcpy(dpart, part, sizeof(*part));
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+ dpart->name = (unsigned char *)&dpart[1];
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+ strcpy(dpart->name, ROOTFS_SPLIT_NAME);
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+
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+ dpart->size -= split_offset - dpart->offset;
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+ dpart->offset = split_offset;
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+
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+ if (dpart == NULL)
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+ return 1;
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+
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+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=%X, len=%X \n",
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+ ROOTFS_SPLIT_NAME, dpart->offset, dpart->size);
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+
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+ ret = add_one_partition(master, dpart, index, NULL);
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+ ret = add_one_partition(master, dpart, index, &slave);
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+ if (ret)
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+ kfree(dpart);
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+ else if (slave)
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+ rpart->split = &slave->mtd;
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+
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+ return ret;
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+}
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+
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+static int refresh_rootfs_split(struct mtd_info *mtd)
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+{
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+ struct mtd_partition tpart;
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+ struct mtd_part *part;
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+ int index = 0;
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+ int offset, size;
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+ int ret;
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+
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+ part = PART(mtd);
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+
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+ /* check for the new squashfs offset first */
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+ ret = split_squashfs(part->master, part->offset, &offset);
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+ if (ret)
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+ return ret;
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+
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+ if ((offset > 0) && !mtd->split) {
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+ printk(KERN_INFO "%s: creating new split partition for \"%s\"\n", __func__, mtd->name);
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+ /* if we don't have a rootfs split partition, create a new one */
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+ tpart.name = mtd->name;
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+ tpart.size = mtd->size;
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+ tpart.offset = part->offset;
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+
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+ /* find the index of the last partition */
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+ if (!list_empty(&mtd_partitions))
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+ index = list_first_entry(&mtd_partitions, struct mtd_part, list)->index + 1;
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+
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+ return split_rootfs_data(part->master, &part->mtd, &tpart, index);
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+ } else if ((offset > 0) && mtd->split) {
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+ /* update the offsets of the existing partition */
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+ size = mtd->size + part->offset - offset;
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+
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+ part = PART(mtd->split);
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+ part->offset = offset;
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+ part->mtd.size = size;
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+ printk(KERN_INFO "%s: %s partition \"" ROOTFS_SPLIT_NAME "\", offset: 0x%06x (0x%06x)\n",
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+ __func__, (!strcmp(part->mtd.name, ROOTFS_SPLIT_NAME) ? "updating" : "creating"),
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+ part->offset, part->mtd.size);
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+ strcpy(part->mtd.name, ROOTFS_SPLIT_NAME);
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+ } else if ((offset <= 0) && mtd->split) {
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+ printk(KERN_INFO "%s: removing partition \"%s\"\n", __func__, mtd->split->name);
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+
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+ /* mark existing partition as removed */
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+ part = PART(mtd->split);
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+ strcpy(part->mtd.name, ROOTFS_REMOVED_NAME);
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+ part->offset = 0;
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+ part->mtd.size = 0;
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+ }
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+
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+ return 0;
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+}
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+#endif /* CONFIG_MTD_ROOTFS_SPLIT */
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+
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/*
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* This function, given a master MTD object and a partition table, creates
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* and registers slave MTD objects which are bound to the master according to
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@@ -320,168 +581,31 @@ int add_mtd_partitions(struct mtd_info *
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@@ -320,168 +628,31 @@
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int nbparts)
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{
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struct mtd_part *slave;
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@ -423,7 +479,20 @@ Index: linux/drivers/mtd/mtdpart.c
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- if (slave->mtd.erasesize < regions[i].erasesize) {
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- slave->mtd.erasesize = regions[i].erasesize;
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- }
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- }
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+ for (i = 0, j = 0; i < nbparts; i++) {
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+ part = (struct mtd_partition *) &parts[i];
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+ ret = add_one_partition(master, part, j, &slave);
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+ if (ret)
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+ return ret;
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+ j++;
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+
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+ if (strcmp(part->name, "rootfs") == 0 && slave->registered) {
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+#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
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+ if (ROOT_DEV == 0) {
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+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
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+ "set to be root filesystem\n");
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+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, slave->mtd.index);
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}
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- } else {
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- /* Single erase size */
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- slave->mtd.erasesize = master->erasesize;
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@ -453,20 +522,7 @@ Index: linux/drivers/mtd/mtdpart.c
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- offs + slave->offset))
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- slave->mtd.ecc_stats.badblocks++;
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- offs += slave->mtd.erasesize;
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+ for (i = 0, j = 0; i < nbparts; i++) {
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+ part = (struct mtd_partition *) &parts[i];
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+ ret = add_one_partition(master, part, j, &slave);
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+ if (ret)
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+ return ret;
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+ j++;
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+
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+ if (strcmp(part->name, "rootfs") == 0 && slave->registered) {
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+#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
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+ if (ROOT_DEV == 0) {
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+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
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+ "set to be root filesystem\n");
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+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, slave->mtd.index);
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}
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- }
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- }
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-
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- if(parts[i].mtdp)
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@ -481,10 +537,423 @@ Index: linux/drivers/mtd/mtdpart.c
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- slave->registered = 1;
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+#endif
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+#ifdef CONFIG_MTD_ROOTFS_SPLIT
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+ ret = split_rootfs_data(master, part, j);
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+ ret = split_rootfs_data(master, &slave->mtd, part, j);
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+ if (ret == 0)
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+ j++;
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+#endif
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}
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}
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@@ -557,7 +728,33 @@
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return ret;
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}
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+int refresh_mtd_partitions(struct mtd_info *mtd)
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+{
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+ int ret = 0;
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+
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+ if (IS_PART(mtd)) {
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+ struct mtd_part *part;
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+ struct mtd_info *master;
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+
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+ part = PART(mtd);
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+ master = part->master;
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+ if (master->refresh_device)
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+ ret = master->refresh_device(master);
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+ }
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+
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+ if (!ret && mtd->refresh_device)
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+ ret = mtd->refresh_device(mtd);
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+
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+#ifdef CONFIG_MTD_ROOTFS_SPLIT
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+ if (!ret && IS_PART(mtd) && !strcmp(mtd->name, "rootfs"))
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+ refresh_rootfs_split(mtd);
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+#endif
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+
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+ return 0;
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+}
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+
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EXPORT_SYMBOL_GPL(parse_mtd_partitions);
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+EXPORT_SYMBOL_GPL(refresh_mtd_partitions);
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EXPORT_SYMBOL_GPL(register_mtd_parser);
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EXPORT_SYMBOL_GPL(deregister_mtd_parser);
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Index: linux-2.6.22.1/drivers/mtd/devices/block2mtd.c
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===================================================================
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--- linux-2.6.22.1.orig/drivers/mtd/devices/block2mtd.c 2007-08-19 23:30:49.794549917 +0200
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+++ linux-2.6.22.1/drivers/mtd/devices/block2mtd.c 2007-08-19 23:31:44.025640373 +0200
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@@ -34,6 +34,8 @@
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struct block_device *blkdev;
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struct mtd_info mtd;
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struct mutex write_mutex;
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+ rwlock_t bdev_mutex;
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+ char devname[0];
|
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};
|
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|
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|
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@@ -86,6 +88,12 @@
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size_t len = instr->len;
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int err;
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|
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+ read_lock(&dev->bdev_mutex);
|
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+ if (!dev->blkdev) {
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+ err = -EINVAL;
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+ goto done;
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+ }
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+
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instr->state = MTD_ERASING;
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mutex_lock(&dev->write_mutex);
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err = _block2mtd_erase(dev, from, len);
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@@ -98,6 +106,10 @@
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instr->state = MTD_ERASE_DONE;
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mtd_erase_callback(instr);
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+
|
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+done:
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+ read_unlock(&dev->bdev_mutex);
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+
|
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return err;
|
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}
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|
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@@ -109,10 +121,14 @@
|
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struct page *page;
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int index = from >> PAGE_SHIFT;
|
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int offset = from & (PAGE_SIZE-1);
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- int cpylen;
|
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+ int cpylen, err = 0;
|
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+
|
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+ read_lock(&dev->bdev_mutex);
|
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+ if (!dev->blkdev || (from > mtd->size)) {
|
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+ err = -EINVAL;
|
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+ goto done;
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+ }
|
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|
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- if (from > mtd->size)
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- return -EINVAL;
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if (from + len > mtd->size)
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len = mtd->size - from;
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|
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@@ -127,10 +143,14 @@
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len = len - cpylen;
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page = page_read(dev->blkdev->bd_inode->i_mapping, index);
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- if (!page)
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- return -ENOMEM;
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- if (IS_ERR(page))
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- return PTR_ERR(page);
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+ if (!page) {
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+ err = -ENOMEM;
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+ goto done;
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+ }
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+ if (IS_ERR(page)) {
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+ err = PTR_ERR(page);
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+ goto done;
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+ }
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|
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memcpy(buf, page_address(page) + offset, cpylen);
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page_cache_release(page);
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@@ -141,7 +161,10 @@
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offset = 0;
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index++;
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}
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- return 0;
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+
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+done:
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+ read_unlock(&dev->bdev_mutex);
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+ return err;
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}
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|
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|
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@@ -193,12 +216,22 @@
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size_t *retlen, const u_char *buf)
|
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{
|
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struct block2mtd_dev *dev = mtd->priv;
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- int err;
|
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+ int err = 0;
|
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+
|
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+ read_lock(&dev->bdev_mutex);
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+ if (!dev->blkdev) {
|
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+ err = -EINVAL;
|
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+ goto done;
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+ }
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|
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if (!len)
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- return 0;
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- if (to >= mtd->size)
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- return -ENOSPC;
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+ goto done;
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+
|
||||
+ if (to >= mtd->size) {
|
||||
+ err = -ENOSPC;
|
||||
+ goto done;
|
||||
+ }
|
||||
+
|
||||
if (to + len > mtd->size)
|
||||
len = mtd->size - to;
|
||||
|
||||
@@ -207,6 +240,9 @@
|
||||
mutex_unlock(&dev->write_mutex);
|
||||
if (err > 0)
|
||||
err = 0;
|
||||
+
|
||||
+done:
|
||||
+ read_unlock(&dev->bdev_mutex);
|
||||
return err;
|
||||
}
|
||||
|
||||
@@ -215,51 +251,29 @@
|
||||
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_excl(dev->blkdev);
|
||||
- }
|
||||
+ 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, char *mtdname)
|
||||
+static int _open_bdev(struct block2mtd_dev *dev)
|
||||
{
|
||||
struct block_device *bdev;
|
||||
- struct block2mtd_dev *dev;
|
||||
- struct mtd_partition *part;
|
||||
-
|
||||
- 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_excl(devname, O_RDWR, NULL);
|
||||
+ bdev = open_bdev_excl(dev->devname, O_RDWR, 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);
|
||||
}
|
||||
@@ -267,17 +281,96 @@
|
||||
#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_excl(dev->blkdev);
|
||||
+ 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;
|
||||
+ else {
|
||||
+ err = rescan_partitions(bdev->bd_disk, bdev);
|
||||
+ }
|
||||
+ if (bdev)
|
||||
+ close_bdev_excl(bdev);
|
||||
+
|
||||
+ /* 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;
|
||||
+
|
||||
+ 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);
|
||||
|
||||
/* Setup the MTD structure */
|
||||
/* make the name contain the block device in */
|
||||
@@ -304,6 +397,7 @@
|
||||
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;
|
||||
Index: linux-2.6.22.1/drivers/mtd/mtdchar.c
|
||||
===================================================================
|
||||
--- linux-2.6.22.1.orig/drivers/mtd/mtdchar.c 2007-08-19 23:30:07.096116671 +0200
|
||||
+++ linux-2.6.22.1/drivers/mtd/mtdchar.c 2007-08-19 23:31:44.041641284 +0200
|
||||
@@ -16,6 +16,7 @@
|
||||
|
||||
#include <linux/mtd/mtd.h>
|
||||
#include <linux/mtd/compatmac.h>
|
||||
+#include <linux/mtd/partitions.h>
|
||||
|
||||
#include <asm/uaccess.h>
|
||||
|
||||
@@ -752,6 +753,13 @@
|
||||
file->f_pos = 0;
|
||||
break;
|
||||
}
|
||||
+#ifdef CONFIG_MTD_PARTITIONS
|
||||
+ case MTDREFRESH:
|
||||
+ {
|
||||
+ ret = refresh_mtd_partitions(mtd);
|
||||
+ break;
|
||||
+ }
|
||||
+#endif
|
||||
|
||||
default:
|
||||
ret = -ENOTTY;
|
||||
Index: linux-2.6.22.1/include/linux/mtd/mtd.h
|
||||
===================================================================
|
||||
--- linux-2.6.22.1.orig/include/linux/mtd/mtd.h 2007-08-19 23:30:07.100116893 +0200
|
||||
+++ linux-2.6.22.1/include/linux/mtd/mtd.h 2007-08-19 23:31:44.105644933 +0200
|
||||
@@ -98,6 +98,7 @@
|
||||
uint8_t *oobbuf;
|
||||
};
|
||||
|
||||
+struct mtd_info;
|
||||
struct mtd_info {
|
||||
u_char type;
|
||||
u_int32_t flags;
|
||||
@@ -195,6 +196,9 @@
|
||||
struct module *owner;
|
||||
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
|
||||
Index: linux-2.6.22.1/include/linux/mtd/partitions.h
|
||||
===================================================================
|
||||
--- linux-2.6.22.1.orig/include/linux/mtd/partitions.h 2007-08-19 23:30:07.112117591 +0200
|
||||
+++ linux-2.6.22.1/include/linux/mtd/partitions.h 2007-08-19 23:31:44.133646528 +0200
|
||||
@@ -36,6 +36,7 @@
|
||||
* erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
|
||||
*/
|
||||
|
||||
+struct mtd_partition;
|
||||
struct mtd_partition {
|
||||
char *name; /* identifier string */
|
||||
u_int32_t size; /* partition size */
|
||||
@@ -43,6 +44,7 @@
|
||||
u_int32_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)*/
|
||||
struct mtd_info **mtdp; /* pointer to store the MTD object */
|
||||
+ int (*refresh_partition)(struct mtd_info *);
|
||||
};
|
||||
|
||||
#define MTDPART_OFS_NXTBLK (-2)
|
||||
@@ -52,6 +54,7 @@
|
||||
|
||||
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
|
||||
Index: linux-2.6.22.1/include/mtd/mtd-abi.h
|
||||
===================================================================
|
||||
--- linux-2.6.22.1.orig/include/mtd/mtd-abi.h 2007-08-19 23:30:07.124118264 +0200
|
||||
+++ linux-2.6.22.1/include/mtd/mtd-abi.h 2007-08-19 23:31:44.157647897 +0200
|
||||
@@ -95,6 +95,7 @@
|
||||
#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
|
||||
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
|
||||
#define MTDFILEMODE _IO('M', 19)
|
||||
+#define MTDREFRESH _IO('M', 23)
|
||||
|
||||
/*
|
||||
* Obsolete legacy interface. Keep it in order not to break userspace
|
||||
Loading…
Reference in a new issue