diff options
| author | Damien Le Moal <damien.lemoal@wdc.com> | 2017-05-09 02:40:47 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-06-19 18:03:51 +0300 |
| commit | 264c869d44dcff17e3b108dbb2fbea24bed08538 (patch) | |
| tree | 512687ea85a4a36cf6be6a59ebfee5ad0b3b59e2 /drivers/md | |
| parent | a4aa5e56e5189b88a2891cdcc350dac618810354 (diff) | |
| download | linux-264c869d44dcff17e3b108dbb2fbea24bed08538.tar.xz | |
dm: fix REQ_OP_ZONE_REPORT bio handling
A REQ_OP_ZONE_REPORT bio is not a medium access command. Its number of
sectors indicates the maximum size allowed for the report reply size and
not an amount of sectors accessed from the device. REQ_OP_ZONE_REPORT
bios should thus not be split depending on the target device maximum I/O
length but passed as-is. Note that it is the responsability of the
target to remap and format the report reply.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index d85adec43fe8..e38d1d7d17d6 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1152,7 +1152,8 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio, return r; } - bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector)); + if (bio_op(bio) != REQ_OP_ZONE_REPORT) + bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector)); clone->bi_iter.bi_size = to_bytes(len); if (unlikely(bio_integrity(bio) != NULL)) @@ -1341,7 +1342,11 @@ static int __split_and_process_non_flush(struct clone_info *ci) if (!dm_target_is_valid(ti)) return -EIO; - len = min_t(sector_t, max_io_len(ci->sector, ti), ci->sector_count); + if (bio_op(bio) == REQ_OP_ZONE_REPORT) + len = ci->sector_count; + else + len = min_t(sector_t, max_io_len(ci->sector, ti), + ci->sector_count); r = __clone_and_map_data_bio(ci, ti, ci->sector, &len); if (r < 0) |