Naohiro reported that issuing zone-append bios to a zoned block device
underneath a dm-linear device does not work as expected.
This because we forgot to reverse-map the sector the device wrote to the
original bio.
For zone-append bios, get the offset in the zone of the written sector
from the clone bio and add that to the original bio's sector position.
Reported-by: Naohiro Aota <naohiro.a...@wdc.com>
Fixes: 0512a75b98f8 ("block: Introduce REQ_OP_ZONE_APPEND")
Signed-off-by: Johannes Thumshirn <johannes.thumsh...@wdc.com>
---
drivers/md/dm.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 109e81f33edb..058c34abe9d1 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1009,6 +1009,7 @@ static void clone_endio(struct bio *bio)
struct dm_io *io = tio->io;
struct mapped_device *md = tio->io->md;
dm_endio_fn endio = tio->ti->type->end_io;
+ struct bio *orig_bio = io->orig_bio;
if (unlikely(error == BLK_STS_TARGET) && md->type !=
DM_TYPE_NVME_BIO_BASED) {
if (bio_op(bio) == REQ_OP_DISCARD &&
@@ -1022,6 +1023,18 @@ static void clone_endio(struct bio *bio)
disable_write_zeroes(md);
}
+ /*
+ * for zone-append bios get offset in zone of the written sector and add
+ * that to the original bio sector pos.
+ */
+ if (bio_op(orig_bio) == REQ_OP_ZONE_APPEND) {
+ sector_t written_sector = bio->bi_iter.bi_sector;
+ struct request_queue *q = orig_bio->bi_disk->queue;
+ u64 mask = (u64)blk_queue_zone_sectors(q) - 1;
+
+ orig_bio->bi_iter.bi_sector += written_sector & mask;
+ }
+
if (endio) {
int r = endio(tio->ti, bio, &error);
switch (r) {
--
2.26.2
--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel
