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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-06-26 16:30:40 -0600 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-06-28 16:06:08 -0400 |
| commit | 15256f6cc4b44f2e70503758150267fd2a53c0d6 (patch) | |
| tree | 4e2e479864e693f0994ce5c39013d4490844c5c4 | |
| parent | 4557641b4c7046625c026fb809c47ef0d43ae595 (diff) | |
| download | linux-15256f6cc4b44f2e70503758150267fd2a53c0d6.tar.gz linux-15256f6cc4b44f2e70503758150267fd2a53c0d6.tar.bz2 linux-15256f6cc4b44f2e70503758150267fd2a53c0d6.zip | |
dax: check for QUEUE_FLAG_DAX in bdev_dax_supported()
Add an explicit check for QUEUE_FLAG_DAX to __bdev_dax_supported(). This
is needed for DM configurations where the first element in the dm-linear or
dm-stripe target supports DAX, but other elements do not. Without this
check __bdev_dax_supported() will pass for such devices, letting a
filesystem on that device mount with the DAX option.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Suggested-by: Mike Snitzer <snitzer@redhat.com>
Fixes: commit 545ed20e6df6 ("dm: add infrastructure for DAX support")
Cc: stable@vger.kernel.org
Acked-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
| -rw-r--r-- | drivers/dax/super.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 903d9c473749..45276abf03aa 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -86,6 +86,7 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) { struct dax_device *dax_dev; bool dax_enabled = false; + struct request_queue *q; pgoff_t pgoff; int err, id; void *kaddr; @@ -99,6 +100,13 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) return false; } + q = bdev_get_queue(bdev); + if (!q || !blk_queue_dax(q)) { + pr_debug("%s: error: request queue doesn't support dax\n", + bdevname(bdev, buf)); + return false; + } + err = bdev_dax_pgoff(bdev, 0, PAGE_SIZE, &pgoff); if (err) { pr_debug("%s: error: unaligned partition for dax\n", |