1 files changed, 9 insertions, 0 deletions

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index b57423caef9b..2ec967d93e5a 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -301,6 +301,15 @@ xfs_mount_validate_sb(
         }
 
         /*
+         * Version 1 directory format has never worked on Linux.
+         */
+        if (unlikely(!XFS_SB_VERSION_HASDIRV2(sbp))) {
+                cmn_err(CE_WARN,
+        "XFS: Attempted to mount file system using version 1 directory format");
+                return XFS_ERROR(ENOSYS);
+        }
+
+        /*
          * Until this is fixed only page-sized or smaller data blocks work.
          */
         if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {