[PATCH 9/9] xfs: wire up the ->mark_dead holder operation for log and RT devices

[Christoph Hellwig <hch@lst.de>]

Implement a set of holder_ops that shut down the file system when the
block device used as log or RT device is removed undeneath the file
system.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_super.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 3abe5ae96cc59b..9c2401d9548d83 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -377,6 +377,17 @@ xfs_setup_dax_always(
 	return 0;
 }
 
+static void
+xfs_hop_mark_dead(
+	struct block_device	*bdev)
+{
+	xfs_force_shutdown(bdev->bd_holder, SHUTDOWN_DEVICE_REMOVED);
+}
+
+static const struct blk_holder_ops xfs_holder_ops = {
+	.mark_dead		= xfs_hop_mark_dead,
+};
+
 STATIC int
 xfs_blkdev_get(
 	xfs_mount_t		*mp,
@@ -386,7 +397,7 @@ xfs_blkdev_get(
 	int			error = 0;
 
 	*bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
-				    mp, NULL);
+				    mp, &xfs_holder_ops);
 	if (IS_ERR(*bdevp)) {
 		error = PTR_ERR(*bdevp);
 		xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
-- 
2.39.2