diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-04-05 19:21:05 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-08 19:25:38 +0200 |
| commit | ac62d6208a7977107a47be4eb8566d6e5034b5f5 (patch) | |
| tree | cac7e46e26b67193cefb333d9aad2f8e87ecfee7 /drivers/md/dm-io.c | |
| parent | dm io: discards don't take a payload (diff) | |
| download | linux-ac62d6208a7977107a47be4eb8566d6e5034b5f5.tar.xz linux-ac62d6208a7977107a47be4eb8566d6e5034b5f5.zip | |
dm: support REQ_OP_WRITE_ZEROES
Copy & paste from the REQ_OP_WRITE_SAME code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index b808cbe22678..3702e502466d 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -312,9 +312,12 @@ static void do_region(int op, int op_flags, unsigned region, */ if (op == REQ_OP_DISCARD) special_cmd_max_sectors = q->limits.max_discard_sectors; + else if (op == REQ_OP_WRITE_ZEROES) + special_cmd_max_sectors = q->limits.max_write_zeroes_sectors; else if (op == REQ_OP_WRITE_SAME) special_cmd_max_sectors = q->limits.max_write_same_sectors; - if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_SAME) && + if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES || + op == REQ_OP_WRITE_SAME) && special_cmd_max_sectors == 0) { dec_count(io, region, -EOPNOTSUPP); return; @@ -330,6 +333,7 @@ static void do_region(int op, int op_flags, unsigned region, */ switch (op) { case REQ_OP_DISCARD: + case REQ_OP_WRITE_ZEROES: num_bvecs = 0; break; case REQ_OP_WRITE_SAME: @@ -347,7 +351,7 @@ static void do_region(int op, int op_flags, unsigned region, bio_set_op_attrs(bio, op, op_flags); store_io_and_region_in_bio(bio, io, region); - if (op == REQ_OP_DISCARD) { + if (op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) { num_sectors = min_t(sector_t, special_cmd_max_sectors, remaining); bio->bi_iter.bi_size = num_sectors << SECTOR_SHIFT; remaining -= num_sectors; |