diff options
| author | Milan Broz <mbroz@redhat.com> | 2007-07-12 17:28:13 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-08-09 14:27:44 -0700 |
| commit | 7afcfb0745af9fc90146c37565cd6998eaefc37f (patch) | |
| tree | 1d567f5edc1e56f931efafa46b986e6f98a21767 | |
| parent | 3bca2f557175e72b20f76d7489695f4c76ca0bf4 (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.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/md/dm-exception-store.c | 11 | ||||
| -rw-r--r-- | drivers/md/dm-snap.c | 5 |
2 files changed, 10 insertions, 6 deletions
diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c index 07e0a0c84f6..4264f69b053 100644 --- a/drivers/md/dm-exception-store.c +++ b/drivers/md/dm-exception-store.c @@ -457,11 +457,6 @@ static int persistent_read_metadata(struct exception_store *store) /* * Sanity checks. */ - if (!ps->valid) { - DMWARN("snapshot is marked invalid"); - return -EINVAL; - } - if (ps->version != SNAPSHOT_DISK_VERSION) { DMWARN("unable to handle snapshot disk version %d", ps->version); @@ -469,6 +464,12 @@ static int persistent_read_metadata(struct exception_store *store) } /* + * Metadata are valid, but snapshot is invalidated + */ + if (!ps->valid) + return 1; + + /* * Read the metadata. */ r = read_exceptions(ps); diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 0821a2b68a7..9227ba4f19d 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -522,9 +522,12 @@ 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); |