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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/md.h | |
| parent | MD: add a new disk role to present write journal device (diff) | |
| download | wireguard-linux-3069aa8def32b0c2b83cd27d1c37ed30b47ce879.tar.xz wireguard-linux-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/md.h')
| -rw-r--r-- | drivers/md/md.h | 8 |
1 files changed, 7 insertions, 1 deletions
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 |