From: Damien Le Moal <damien.lem...@wdc.com>
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.lem...@wdc.com>
---
drivers/md/dm.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 1d98035..cd44928 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1098,7 +1098,8 @@ 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 (bio_integrity(bio))
@@ -1275,7 +1276,11 @@ 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)
--
2.9.3
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