diff options
Diffstat (limited to 'drivers/md/dm-snap.c')
| -rw-r--r-- | drivers/md/dm-snap.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index ab54f99b7c3..4b9dd8fb1e5 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -371,6 +371,20 @@ static inline ulong round_up(ulong n, ulong size) return (n + size) & ~size; } +static void read_snapshot_metadata(struct dm_snapshot *s) +{ + if (s->have_metadata) + return; + + if (s->store.read_metadata(&s->store)) { + down_write(&s->lock); + s->valid = 0; + up_write(&s->lock); + } + + s->have_metadata = 1; +} + /* * Construct a snapshot mapping: <origin_dev> <COW-dev> <p/n> <chunk-size> */ @@ -848,16 +862,7 @@ static void snapshot_resume(struct dm_target *ti) { struct dm_snapshot *s = (struct dm_snapshot *) ti->private; - if (s->have_metadata) - return; - - if (s->store.read_metadata(&s->store)) { - down_write(&s->lock); - s->valid = 0; - up_write(&s->lock); - } - - s->have_metadata = 1; + read_snapshot_metadata(s); } static int snapshot_status(struct dm_target *ti, status_type_t type, |