aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/md
diff options
context:
space:
mode:
authorAlasdair G Kergon <agk@redhat.com>2005-07-12 18:53:05 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-12 19:19:11 -0400
commitd5e404c10a98fc2979643476851e9cbdb1944812 (patch)
tree1d7d846b43a6a8a022e5cf4fd5453b27abf0de94 /drivers/md
parent93c534aefb906824d71ea779ed0c7f1573843f4e (diff)
[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>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-snap.c4
-rw-r--r--drivers/md/dm-table.c1
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 594d1f6b4789..ab54f99b7c3b 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)
931 if (!snap->valid) 931 if (!snap->valid)
932 continue; 932 continue;
933 933
934 /* Nothing to do if writing beyond end of snapshot */
935 if (bio->bi_sector >= dm_table_get_size(snap->table))
936 continue;
937
934 down_write(&snap->lock); 938 down_write(&snap->lock);
935 939
936 /* 940 /*
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 18e9b9953fcd..a5a4c0ed8a14 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -943,6 +943,7 @@ EXPORT_SYMBOL(dm_vcalloc);
943EXPORT_SYMBOL(dm_get_device); 943EXPORT_SYMBOL(dm_get_device);
944EXPORT_SYMBOL(dm_put_device); 944EXPORT_SYMBOL(dm_put_device);
945EXPORT_SYMBOL(dm_table_event); 945EXPORT_SYMBOL(dm_table_event);
946EXPORT_SYMBOL(dm_table_get_size);
946EXPORT_SYMBOL(dm_table_get_mode); 947EXPORT_SYMBOL(dm_table_get_mode);
947EXPORT_SYMBOL(dm_table_put); 948EXPORT_SYMBOL(dm_table_put);
948EXPORT_SYMBOL(dm_table_get); 949EXPORT_SYMBOL(dm_table_get);