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| author | Anand Jain <anand.jain@oracle.com> | 2017-04-06 05:22:53 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-04-18 16:13:27 +0200 |
| commit | c2a9c7ab475bc3aaf06521a39ac65bc48c8cad4f (patch) | |
| tree | f605531dbf3f58c262ddeec51239619b044696d3 | |
| parent | btrfs: delete unused member nobarriers (diff) | |
| download | linux-c2a9c7ab475bc3aaf06521a39ac65bc48c8cad4f.tar.xz linux-c2a9c7ab475bc3aaf06521a39ac65bc48c8cad4f.zip | |
btrfs: check if the device is flush capable
The block layer call chain from submit_bio will check if the write cache
is enabled for the given queue before submitting the flush. This will
add a code to fail fast if its not.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ updated changelog to reflect current code stat, blkdev_issue_flush is
not used yet ]
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/disk-io.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index e070e463ad8b..ba7bd65693a3 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3518,9 +3518,13 @@ static void btrfs_end_empty_barrier(struct bio *bio) */ static int write_dev_flush(struct btrfs_device *device, int wait) { + struct request_queue *q = bdev_get_queue(device->bdev); struct bio *bio; int ret = 0; + if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) + return 0; + if (wait) { bio = device->flush_bio; if (!bio) |