[PATCH 12/16] xfs: wire up sops->shutdown

[Christoph Hellwig <hch@lst.de>]

Wire up the shutdown method to shut down the file system when the
underlying block device is marked dead.  Add a new message to
clearly distinguish this shutdown reason from other shutdowns.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/xfs_fsops.c | 3 +++
 fs/xfs/xfs_mount.h | 4 +++-
 fs/xfs/xfs_super.c | 8 ++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 13851c0d640bc8..9ebb8333a30800 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -534,6 +534,9 @@ xfs_do_force_shutdown(
 	} else if (flags & SHUTDOWN_CORRUPT_ONDISK) {
 		tag = XFS_PTAG_SHUTDOWN_CORRUPT;
 		why = "Corruption of on-disk metadata";
+	} else if (flags & SHUTDOWN_DEVICE_REMOVED) {
+		tag = XFS_PTAG_SHUTDOWN_IOERROR;
+		why = "Block device removal";
 	} else {
 		tag = XFS_PTAG_SHUTDOWN_IOERROR;
 		why = "Metadata I/O Error";
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index aaaf5ec13492d2..429a5e12c1036e 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -457,12 +457,14 @@ void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
 #define SHUTDOWN_FORCE_UMOUNT	(1u << 2) /* shutdown from a forced unmount */
 #define SHUTDOWN_CORRUPT_INCORE	(1u << 3) /* corrupt in-memory structures */
 #define SHUTDOWN_CORRUPT_ONDISK	(1u << 4)  /* corrupt metadata on device */
+#define SHUTDOWN_DEVICE_REMOVED	(1u << 5) /* device removed underneath us */
 
 #define XFS_SHUTDOWN_STRINGS \
 	{ SHUTDOWN_META_IO_ERROR,	"metadata_io" }, \
 	{ SHUTDOWN_LOG_IO_ERROR,	"log_io" }, \
 	{ SHUTDOWN_FORCE_UMOUNT,	"force_umount" }, \
-	{ SHUTDOWN_CORRUPT_INCORE,	"corruption" }
+	{ SHUTDOWN_CORRUPT_INCORE,	"corruption" }, \
+	{ SHUTDOWN_DEVICE_REMOVED,	"device_removed" }
 
 /*
  * Flags for xfs_mountfs
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 5684c538eb76dc..eb469b8f9a0497 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1159,6 +1159,13 @@ xfs_fs_free_cached_objects(
 	return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
 }
 
+static void
+xfs_fs_shutdown(
+	struct super_block	*sb)
+{
+	xfs_force_shutdown(XFS_M(sb), SHUTDOWN_DEVICE_REMOVED);
+}
+
 static const struct super_operations xfs_super_operations = {
 	.alloc_inode		= xfs_fs_alloc_inode,
 	.destroy_inode		= xfs_fs_destroy_inode,
@@ -1172,6 +1179,7 @@ static const struct super_operations xfs_super_operations = {
 	.show_options		= xfs_fs_show_options,
 	.nr_cached_objects	= xfs_fs_nr_cached_objects,
 	.free_cached_objects	= xfs_fs_free_cached_objects,
+	.shutdown		= xfs_fs_shutdown,
 };
 
 static int
-- 
2.39.2