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| author | Alasdair G Kergon <agk@redhat.com> | 2005-07-12 15:53:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-12 16:19:11 -0700 |
| commit | d5e404c10a98fc2979643476851e9cbdb1944812 (patch) | |
| tree | 1d7d846b43a6a8a022e5cf4fd5453b27abf0de94 | |
| parent | 93c534aefb906824d71ea779ed0c7f1573843f4e (diff) | |
| download | linux-3.10-d5e404c10a98fc2979643476851e9cbdb1944812.tar.gz linux-3.10-d5e404c10a98fc2979643476851e9cbdb1944812.tar.bz2 linux-3.10-d5e404c10a98fc2979643476851e9cbdb1944812.zip | |
[PATCH] device-mapper snapshots: Handle origin extension
Handle writes to a snapshot-origin device that has been extended since the
snapshot was taken.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/md/dm-snap.c | 4 | ||||
| -rw-r--r-- | drivers/md/dm-table.c | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 594d1f6b478..ab54f99b7c3 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -931,6 +931,10 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio) if (!snap->valid) continue; + /* Nothing to do if writing beyond end of snapshot */ + if (bio->bi_sector >= dm_table_get_size(snap->table)) + continue; + down_write(&snap->lock); /* diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 18e9b9953fc..a5a4c0ed8a1 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -943,6 +943,7 @@ EXPORT_SYMBOL(dm_vcalloc); EXPORT_SYMBOL(dm_get_device); EXPORT_SYMBOL(dm_put_device); EXPORT_SYMBOL(dm_table_event); +EXPORT_SYMBOL(dm_table_get_size); EXPORT_SYMBOL(dm_table_get_mode); EXPORT_SYMBOL(dm_table_put); EXPORT_SYMBOL(dm_table_get); |