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authorMike Snitzer <snitzer@redhat.com>2015-09-08 08:56:13 -0400
committerMike Snitzer <snitzer@redhat.com>2015-09-13 21:32:10 -0400
commit216076705d6ac291d42e0f8dd85e6a0da98c0fa3 (patch)
tree600cdacc6f00a7093181fd64ca25cd07f5dbf3f2 /drivers/md/dm-thin.c
parent6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff)
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dm thin: disable discard support for thin devices if pool's is disabled
If the pool is configured with 'ignore_discard' its discard support is disabled. The pool's thin devices should also have queue_limits that reflect discards are disabled. Fixes: 34fbcf62 ("dm thin: range discard support") Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org # 4.1+
Diffstat (limited to 'drivers/md/dm-thin.c')
-rw-r--r--drivers/md/dm-thin.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 6578b7bc1fbb..6fcbfb063366 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -4249,6 +4249,10 @@ static void thin_io_hints(struct dm_target *ti, struct queue_limits *limits)
{
struct thin_c *tc = ti->private;
struct pool *pool = tc->pool;
+ struct queue_limits *pool_limits = dm_get_queue_limits(pool->pool_md);
+
+ if (!pool_limits->discard_granularity)
+ return; /* pool's discard support is disabled */
limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT;
limits->max_discard_sectors = 2048 * 1024 * 16; /* 16G */