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| author |   Mike Snitzer <snitzer@redhat.com> | 2019-01-18 14:19:26 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2019-02-20 23:24:55 -0500 |
| commit | 61697a6abd24acba941359c6268a94f4afe4a53d (patch) | |
| tree | 9c1b1de749c7479a1a9f14392c673f84f4ede9a4 /drivers/md/dm.c | |
| parent | dm: update dm_process_bio() to split bio if in ->make_request_fn() (diff) | |
| download | wireguard-linux-61697a6abd24acba941359c6268a94f4afe4a53d.tar.xz wireguard-linux-61697a6abd24acba941359c6268a94f4afe4a53d.zip | |
dm: eliminate 'split_discard_bios' flag from DM target interface
There is no need to have DM core split discards on behalf of a DM target
now that blk_queue_split() handles splitting discards based on the
queue_limits. A DM target just needs to set max_discard_sectors,
discard_granularity, etc, in queue_limits.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 25 |
1 files changed, 6 insertions, 19 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 7a774fcd0194..55f12df3589d 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1478,17 +1478,10 @@ static unsigned get_num_write_zeroes_bios(struct dm_target *ti) return ti->num_write_zeroes_bios; } -typedef bool (*is_split_required_fn)(struct dm_target *ti); - -static bool is_split_required_for_discard(struct dm_target *ti) -{ - return ti->split_discard_bios; -} - static int __send_changing_extent_only(struct clone_info *ci, struct dm_target *ti, - unsigned num_bios, bool is_split_required) + unsigned num_bios) { - unsigned len; + unsigned len = ci->sector_count; /* * Even though the device advertised support for this type of @@ -1499,11 +1492,6 @@ static int __send_changing_extent_only(struct clone_info *ci, struct dm_target * if (!num_bios) return -EOPNOTSUPP; - if (!is_split_required) - len = min((sector_t)ci->sector_count, max_io_len_target_boundary(ci->sector, ti)); - else - len = min((sector_t)ci->sector_count, max_io_len(ci->sector, ti)); - __send_duplicate_bios(ci, ti, num_bios, &len); ci->sector += len; @@ -1514,23 +1502,22 @@ static int __send_changing_extent_only(struct clone_info *ci, struct dm_target * static int __send_discard(struct clone_info *ci, struct dm_target *ti) { - return __send_changing_extent_only(ci, ti, get_num_discard_bios(ti), - is_split_required_for_discard(ti)); + return __send_changing_extent_only(ci, ti, get_num_discard_bios(ti)); } static int __send_secure_erase(struct clone_info *ci, struct dm_target *ti) { - return __send_changing_extent_only(ci, ti, get_num_secure_erase_bios(ti), false); + return __send_changing_extent_only(ci, ti, get_num_secure_erase_bios(ti)); } static int __send_write_same(struct clone_info *ci, struct dm_target *ti) { - return __send_changing_extent_only(ci, ti, get_num_write_same_bios(ti), false); + return __send_changing_extent_only(ci, ti, get_num_write_same_bios(ti)); } static int __send_write_zeroes(struct clone_info *ci, struct dm_target *ti) { - return __send_changing_extent_only(ci, ti, get_num_write_zeroes_bios(ti), false); + return __send_changing_extent_only(ci, ti, get_num_write_zeroes_bios(ti)); } static bool is_abnormal_io(struct bio *bio) |