diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2011-01-13 19:59:48 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2011-01-13 19:59:48 +0000 |
| commit | 5fc2ffeabb9ee0fc0e71ff16b49f34f0ed3d05b4 (patch) | |
| tree | 338c273e43209ebf5de5aef13186ce0666e7e06f /drivers | |
| parent | 84c89557a302e18414a011cc52b1abd034860743 (diff) | |
| download | lwn-5fc2ffeabb9ee0fc0e71ff16b49f34f0ed3d05b4.tar.gz lwn-5fc2ffeabb9ee0fc0e71ff16b49f34f0ed3d05b4.zip | |
dm raid1: support discard
Enable discard support in the DM mirror target.
Also change an existing use of 'bvec' to 'addr' in the union.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-raid1.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 19a59b041c27..c87756eb7a21 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -261,7 +261,7 @@ static int mirror_flush(struct dm_target *ti) struct dm_io_request io_req = { .bi_rw = WRITE_FLUSH, .mem.type = DM_IO_KMEM, - .mem.ptr.bvec = NULL, + .mem.ptr.addr = NULL, .client = ms->io_client, }; @@ -637,6 +637,12 @@ static void do_write(struct mirror_set *ms, struct bio *bio) .client = ms->io_client, }; + if (bio->bi_rw & REQ_DISCARD) { + io_req.bi_rw |= REQ_DISCARD; + io_req.mem.type = DM_IO_KMEM; + io_req.mem.ptr.addr = NULL; + } + for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++) map_region(dest++, m, bio); @@ -670,7 +676,8 @@ static void do_writes(struct mirror_set *ms, struct bio_list *writes) bio_list_init(&requeue); while ((bio = bio_list_pop(writes))) { - if (bio->bi_rw & REQ_FLUSH) { + if ((bio->bi_rw & REQ_FLUSH) || + (bio->bi_rw & REQ_DISCARD)) { bio_list_add(&sync, bio); continue; } @@ -1076,6 +1083,7 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->private = ms; ti->split_io = dm_rh_get_region_size(ms->rh); ti->num_flush_requests = 1; + ti->num_discard_requests = 1; ms->kmirrord_wq = create_singlethread_workqueue("kmirrord"); if (!ms->kmirrord_wq) { |