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| author | NeilBrown <neilb@cse.unsw.edu.au> | 2005-09-09 16:23:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 16:39:11 -0700 |
| commit | 71c0805cb48462c99fbe0e5fcc6c12d7b9929c09 (patch) | |
| tree | a6234c60b036ba05807bf649ffa7cf56eda13574 | |
| parent | 7b1e35f6d666693e8f376ce02242efca3ec09aaf (diff) | |
| download | linux-3.10-71c0805cb48462c99fbe0e5fcc6c12d7b9929c09.tar.gz linux-3.10-71c0805cb48462c99fbe0e5fcc6c12d7b9929c09.tar.bz2 linux-3.10-71c0805cb48462c99fbe0e5fcc6c12d7b9929c09.zip | |
[PATCH] md: allow md to load a superblock with feature-bit '1' set
As this is used to flag an internal bitmap.
Also, introduce symbolic names for feature bits.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/md/md.c | 6 | ||||
| -rw-r--r-- | include/linux/raid/md_p.h | 5 |
2 files changed, 8 insertions, 3 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 866c704e008..1be3f2de396 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -875,7 +875,7 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version) sb->major_version != cpu_to_le32(1) || le32_to_cpu(sb->max_dev) > (4096-256)/2 || le64_to_cpu(sb->super_offset) != (rdev->sb_offset<<1) || - sb->feature_map != 0) + (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) return -EINVAL; if (calc_sb_1_csum(sb) != sb->sb_csum) { @@ -954,7 +954,7 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev) mddev->max_disks = (4096-256)/2; - if ((le32_to_cpu(sb->feature_map) & 1) && + if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && mddev->bitmap_file == NULL ) { if (mddev->level != 1) { printk(KERN_WARNING "md: bitmaps only supported for raid1\n"); @@ -1029,7 +1029,7 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev) if (mddev->bitmap && mddev->bitmap_file == NULL) { sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset); - sb->feature_map = cpu_to_le32(1); + sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); } max_dev = 0; diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h index 4f047f84fb1..c100fa5d4bf 100644 --- a/include/linux/raid/md_p.h +++ b/include/linux/raid/md_p.h @@ -238,5 +238,10 @@ struct mdp_superblock_1 { __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ }; +/* feature_map bits */ +#define MD_FEATURE_BITMAP_OFFSET 1 + +#define MD_FEATURE_ALL 1 + #endif |