diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-12-10 23:52:04 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-12-10 23:52:04 +0000 |
| commit | 87968ddd2f3be1c21b932cac30157a83a1c4f935 (patch) | |
| tree | f4d4caa4ec52f697ed5745a88322d3620cf7ee0a /drivers/md/dm-raid1.c | |
| parent | 0f398a8403e31c737b429fddc3850093d0bf58d0 (diff) | |
| download | linux-87968ddd2f3be1c21b932cac30157a83a1c4f935.tar.gz | |
dm raid1: abstract get_valid_mirror function
Move the logic to get a valid mirror leg into a function for re-use in a later patch. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Takahiro Yasui <tyasui@redhat.com> Tested-by: Takahiro Yasui <tyasui@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-raid1.c')
| -rw-r--r-- | drivers/md/dm-raid1.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 0253130fa13a..d1a7f1a4789c 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -181,6 +181,17 @@ static void set_default_mirror(struct mirror *m) atomic_set(&ms->default_mirror, m - m0); } +static struct mirror *get_valid_mirror(struct mirror_set *ms) +{ + struct mirror *m; + + for (m = ms->mirror; m < ms->mirror + ms->nr_mirrors; m++) + if (!atomic_read(&m->error_count)) + return m; + + return NULL; +} + /* fail_mirror * @m: mirror device to fail * @error_type: one of the enum's, DM_RAID1_*_ERROR @@ -226,13 +237,10 @@ static void fail_mirror(struct mirror *m, enum dm_raid1_error error_type) goto out; } - for (new = ms->mirror; new < ms->mirror + ms->nr_mirrors; new++) - if (!atomic_read(&new->error_count)) { - set_default_mirror(new); - break; - } - - if (unlikely(new == ms->mirror + ms->nr_mirrors)) + new = get_valid_mirror(ms); + if (new) + set_default_mirror(new); + else DMWARN("All sides of mirror have failed."); out: |