}
/*
- * Construct a snapshot mapping: <origin_dev> <COW-dev> <p/n> <chunk-size>
+ * Construct a snapshot mapping: <origin_dev> <COW-dev> <p|po|n> <chunk-size>
*/
static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
{
u.store_swap = snap_dest->store;
snap_dest->store = snap_src->store;
+ snap_dest->store->userspace_supports_overflow = u.store_swap->userspace_supports_overflow;
snap_src->store = u.store_swap;
snap_dest->store->snap = snap_dest;
pe = __find_pending_exception(s, pe, chunk);
if (!pe) {
- s->snapshot_overflowed = 1;
- DMERR("Snapshot overflowed: Unable to allocate exception.");
+ if (s->store->userspace_supports_overflow) {
+ s->snapshot_overflowed = 1;
+ DMERR("Snapshot overflowed: Unable to allocate exception.");
+ } else
+ __invalidate_snapshot(s, -ENOMEM);
r = -EIO;
goto out_unlock;
}
static struct target_type snapshot_target = {
.name = "snapshot",
- .version = {1, 14, 0},
+ .version = {1, 15, 0},
.module = THIS_MODULE,
.ctr = snapshot_ctr,
.dtr = snapshot_dtr,
static struct target_type merge_target = {
.name = dm_snapshot_merge_target_name,
- .version = {1, 3, 0},
+ .version = {1, 4, 0},
.module = THIS_MODULE,
.ctr = snapshot_ctr,
.dtr = snapshot_dtr,