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block: allow device to have both virt_boundary_mask and max segment size

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When one stacking device is over one device with virt_boundary_mask and
another one with max segment size, the stacking device have both limits
set. This way is allowed before d690cb8ae1 ("block: add an API to
atomically update queue limits").

Relax the limit so that we won't break such kind of stacking setting.

Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218687
Reported-by: janpieter.sollie@edpnet.be
Fixes: d690cb8ae1 ("block: add an API to atomically update queue limits")
Link: https://lore.kernel.org/linux-block/ZfGl8HzUpiOxCLm3@fedora/
Cc: Christoph Hellwig <hch@lst.de>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: dm-devel@lists.linux.dev
Cc: Song Liu <song@kernel.org>
Cc: linux-raid@vger.kernel.org
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20240407131931.4055231-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2024-04-07 21:19:31 +08:00 committed by Jens Axboe
parent 8b8ace0803
commit b561ea56a2
1 changed files with 6 additions and 10 deletions
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16
block/blk-settings.c
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@ -182,17 +182,13 @@ static int blk_validate_limits(struct queue_limits *lim)
return -EINVAL;
/*
* Devices that require a virtual boundary do not support scatter/gather
* I/O natively, but instead require a descriptor list entry for each
* page (which might not be identical to the Linux PAGE_SIZE). Because
* of that they are not limited by our notion of "segment size".
* Stacking device may have both virtual boundary and max segment
* size limit, so allow this setting now, and long-term the two
* might need to move out of stacking limits since we have immutable
* bvec and lower layer bio splitting is supposed to handle the two
* correctly.
*/
if (lim->virt_boundary_mask) {
if (WARN_ON_ONCE(lim->max_segment_size &&
lim->max_segment_size != UINT_MAX))
return -EINVAL;
lim->max_segment_size = UINT_MAX;
} else {
if (!lim->virt_boundary_mask) {
/*
* The maximum segment size has an odd historic 64k default that
* drivers probably should override. Just like the I/O size we