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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-10-16 23:18:16 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-10-16 23:18:16 +0100 |
| commit | 3f2412dc85260e5aae7ebb03bf50d5b1407e3083 (patch) | |
| tree | c736dc9a52677e29b4dfeb3061da5111edbb9454 /drivers/md/dm-snap.c | |
| parent | f88fb981183e71daf40bbd84bc8251bbf7b59e19 (diff) | |
| download | blackbird-op-linux-3f2412dc85260e5aae7ebb03bf50d5b1407e3083.tar.gz blackbird-op-linux-3f2412dc85260e5aae7ebb03bf50d5b1407e3083.zip | |
dm snapshot: require non zero chunk size by end of ctr
If we are creating snapshot with memory-stored exception store, fail if
the user didn't specify chunk size. Zero chunk size would probably crash
a lot of places in the rest of snapshot code.
Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Jonathan Brassow <jbrassow@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-snap.c')
| -rw-r--r-- | drivers/md/dm-snap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 53f4063f7ea4..9cb392b3e920 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -673,6 +673,11 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) bio_list_init(&s->queued_bios); INIT_WORK(&s->queued_bios_work, flush_queued_bios); + if (!s->store->chunk_size) { + ti->error = "Chunk size not set"; + goto bad_load_and_register; + } + /* Add snapshot to the list of snapshots for this origin */ /* Exceptions aren't triggered till snapshot_resume() is called */ if (register_snapshot(s)) { |
