diff options
| -rw-r--r-- | drivers/md/dm.c | 5 | ||||
| -rw-r--r-- | include/linux/device-mapper.h | 6 |
2 files changed, 10 insertions, 1 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 415c2803c0c..4e09b6ff5b4 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1215,7 +1215,10 @@ static int __clone_and_map_discard(struct clone_info *ci) if (!ti->num_discard_requests) return -EOPNOTSUPP; - len = min(ci->sector_count, max_io_len_target_boundary(ci->sector, ti)); + if (!ti->split_discard_requests) + len = min(ci->sector_count, max_io_len_target_boundary(ci->sector, ti)); + else + len = min(ci->sector_count, max_io_len(ci->sector, ti)); __issue_target_requests(ci, ti, ti->num_discard_requests, len); diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index b19c1e189a6..8bdbbfce759 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -218,6 +218,12 @@ struct dm_target { unsigned discards_supported:1; /* + * Set if the target required discard request to be split + * on max_io_len boundary. + */ + unsigned split_discard_requests:1; + + /* * Set if this target does not return zeroes on discarded blocks. */ unsigned discard_zeroes_data_unsupported:1; |