From 0764147b111b8ca886e4f2e9c9e019106b09b657 Mon Sep 17 00:00:00 2001 From: Milan Broz Date: Thu, 12 Jul 2007 17:28:13 +0100 Subject: 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 Signed-off-by: Alasdair G Kergon Signed-off-by: Linus Torvalds --- drivers/md/dm-snap.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/md/dm-snap.c') diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 1da41229fbf2..854891d07b59 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) /* Metadata must only be loaded into one table at once */ r = s->store.read_metadata(&s->store); - if (r) { + if (r < 0) { ti->error = "Failed to read snapshot metadata"; goto bad6; + } else if (r > 0) { + s->valid = 0; + DMWARN("Snapshot is marked invalid."); } bio_list_init(&s->queued_bios); -- cgit v1.2.3