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| author | Shaohua Li <shli@fb.com> | 2015-08-13 14:31:56 -0700 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-10-24 17:16:18 +1100 |
| commit | 3069aa8def32b0c2b83cd27d1c37ed30b47ce879 (patch) | |
| tree | a2e8141984b338b15a0d940f416e48177acd2801 /drivers/md | |
| parent | bac624f3f86a8c7db395c7f85ccad6a504b9c4b4 (diff) | |
| download | linux-stable-3069aa8def32b0c2b83cd27d1c37ed30b47ce879.tar.gz linux-stable-3069aa8def32b0c2b83cd27d1c37ed30b47ce879.tar.bz2 linux-stable-3069aa8def32b0c2b83cd27d1c37ed30b47ce879.zip | |
md: override md superblock recovery_offset for journal device
Journal device stores data in a log structure. We need record the log
start. Here we override md superblock recovery_offset for this purpose.
This field of a journal device is meaningless otherwise.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md.c | 6 | ||||
| -rw-r--r-- | drivers/md/md.h | 8 |
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 391341a772c7..3592beb6931e 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1646,6 +1646,7 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) return -EINVAL; } set_bit(Journal, &rdev->flags); + rdev->journal_tail = le64_to_cpu(sb->journal_tail); break; default: rdev->saved_raid_disk = role; @@ -1721,6 +1722,9 @@ static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) sb->feature_map |= cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); } + /* Note: recovery_offset and journal_tail share space */ + if (test_bit(Journal, &rdev->flags)) + sb->journal_tail = cpu_to_le64(rdev->journal_tail); if (test_bit(Replacement, &rdev->flags)) sb->feature_map |= cpu_to_le32(MD_FEATURE_REPLACEMENT); @@ -8097,6 +8101,8 @@ static int remove_and_add_spares(struct mddev *mddev, continue; if (test_bit(Faulty, &rdev->flags)) continue; + if (test_bit(Journal, &rdev->flags)) + continue; if (mddev->ro && ! (rdev->saved_raid_disk >= 0 && !test_bit(Bitmap_sync, &rdev->flags))) diff --git a/drivers/md/md.h b/drivers/md/md.h index 88dc6312f5d5..2b0f62fb6146 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -87,10 +87,16 @@ struct md_rdev { * array and could again if we did a partial * resync from the bitmap */ - sector_t recovery_offset;/* If this device has been partially + union { + sector_t recovery_offset;/* If this device has been partially * recovered, this is where we were * up to. */ + sector_t journal_tail; /* If this device is a journal device, + * this is the journal tail (journal + * recovery start point) + */ + }; atomic_t nr_pending; /* number of pending requests. * only maintained for arrays that |