6.15-stable review patch. If anyone has any objections, please let me know.
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From: Benjamin Marzinski bmarzins@redhat.com
[ Upstream commit 8ca719b81987be690f197e82fdb030580c0a07f3 ]
Due to the semantics of iterate_devices(), the current code allows a request-based dm table as long as it includes one request-stackable device. It is supposed to only allow tables where there are no non-request-stackable devices.
Signed-off-by: Benjamin Marzinski bmarzins@redhat.com Reviewed-by: Mike Snitzer snitzer@kernel.org Signed-off-by: Mikulas Patocka mpatocka@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/dm-table.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index dd074c8ecbba..587a9833c1f6 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -900,17 +900,17 @@ static bool dm_table_supports_dax(struct dm_table *t, return true; }
-static int device_is_rq_stackable(struct dm_target *ti, struct dm_dev *dev, - sector_t start, sector_t len, void *data) +static int device_is_not_rq_stackable(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) { struct block_device *bdev = dev->bdev; struct request_queue *q = bdev_get_queue(bdev);
/* request-based cannot stack on partitions! */ if (bdev_is_partition(bdev)) - return false; + return true;
- return queue_is_mq(q); + return !queue_is_mq(q); }
static int dm_table_determine_type(struct dm_table *t) @@ -1006,7 +1006,7 @@ static int dm_table_determine_type(struct dm_table *t)
/* Non-request-stackable devices can't be used for request-based dm */ if (!ti->type->iterate_devices || - !ti->type->iterate_devices(ti, device_is_rq_stackable, NULL)) { + ti->type->iterate_devices(ti, device_is_not_rq_stackable, NULL)) { DMERR("table load rejected: including non-request-stackable devices"); return -EINVAL; }