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authorMilan Broz <mbroz@redhat.com>2007-07-12 12:28:13 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-12 18:01:08 -0400
commit0764147b111b8ca886e4f2e9c9e019106b09b657 (patch)
tree815c9d80c961d54c79692ebe4751318c9052ad45 /drivers/md/dm-snap.c
parentfcac03abd325e4f7a4cc8fe05fea2793b1c8eb75 (diff)
dm snapshot: permit invalid activation
Allow invalid snapshots to be activated instead of failing. This allows userspace to reinstate any given snapshot state - for example after an unscheduled reboot - and clean up the invalid snapshot at its leisure. Cc: stable@kernel.org Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md/dm-snap.c')
-rw-r--r--drivers/md/dm-snap.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 1da41229fbf..854891d07b5 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -523,9 +523,12 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
523 523
524 /* Metadata must only be loaded into one table at once */ 524 /* Metadata must only be loaded into one table at once */
525 r = s->store.read_metadata(&s->store); 525 r = s->store.read_metadata(&s->store);
526 if (r) { 526 if (r < 0) {
527 ti->error = "Failed to read snapshot metadata"; 527 ti->error = "Failed to read snapshot metadata";
528 goto bad6; 528 goto bad6;
529 } else if (r > 0) {
530 s->valid = 0;
531 DMWARN("Snapshot is marked invalid.");
529 } 532 }
530 533
531 bio_list_init(&s->queued_bios); 534 bio_list_init(&s->queued_bios);