Message ID | 20220923173618.6899-12-p.raghav@samsung.com (mailing list archive) |
---|---|
State | Awaiting Upstream, archived |
Delegated to: | Mike Snitzer |
Headers | show |
Series | support zoned block devices with non-power-of-2 zone sizes | expand |
On 9/23/22 10:36, Pankaj Raghav wrote: > dm_zone_endio() updates the bi_sector of orig bio for zoned devices that > uses either native append or append emulation, and it is called before the > endio of the target. But target endio can still update the clone bio > after dm_zone_endio is called, thereby, the orig bio does not contain > the updated information anymore. > > Currently, this is not a problem as the targets that support zoned devices > such as dm-zoned, dm-linear, and dm-crypt do not have an endio function, > and even if they do (such as dm-flakey), they don't modify the > bio->bi_iter.bi_sector of the cloned bio that is used to update the > orig_bio's bi_sector in dm_zone_endio function. > > This is a prep patch for the new dm-po2zoned target as it modifies > bi_sector in the endio callback. > > Call dm_zone_endio for zoned devices after calling the target's endio > function. Reviewed-by: Bart Van Assche <bvanassche@acm.org> -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 7c35dea88ed1..874e1dc9fc26 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1122,10 +1122,6 @@ static void clone_endio(struct bio *bio) disable_write_zeroes(md); } - if (static_branch_unlikely(&zoned_enabled) && - unlikely(bdev_is_zoned(bio->bi_bdev))) - dm_zone_endio(io, bio); - if (endio) { int r = endio(ti, bio, &error); switch (r) { @@ -1154,6 +1150,10 @@ static void clone_endio(struct bio *bio) } } + if (static_branch_unlikely(&zoned_enabled) && + unlikely(bdev_is_zoned(bio->bi_bdev))) + dm_zone_endio(io, bio); + if (static_branch_unlikely(&swap_bios_enabled) && unlikely(swap_bios_limit(ti, bio))) up(&md->swap_bios_semaphore);