btrfs: add missing options displayed in mount output

There are three missed mount options settable by user which are not
currently displayed in mount output.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8e948ec1ee6b..60e13ef23a5e 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1336,6 +1336,11 @@ struct btrfs_ioctl_defrag_range_args {
  */
 #define BTRFS_STRING_ITEM_KEY   253
 
+/*
+ * Flags for mount options.
+ *
+ * Note: don't forget to add new options to btrfs_show_options()
+ */
 #define BTRFS_MOUNT_NODATASUM           (1 << 0)
 #define BTRFS_MOUNT_NODATACOW           (1 << 1)
 #define BTRFS_MOUNT_NOBARRIER           (1 << 2)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 3559d0b3518a..5746081199ee 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -721,6 +721,12 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
                 seq_puts(seq, ",clear_cache");
         if (btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED))
                 seq_puts(seq, ",user_subvol_rm_allowed");
+        if (btrfs_test_opt(root, ENOSPC_DEBUG))
+                seq_puts(seq, ",enospc_debug");
+        if (btrfs_test_opt(root, AUTO_DEFRAG))
+                seq_puts(seq, ",autodefrag");
+        if (btrfs_test_opt(root, INODE_MAP_CACHE))
+                seq_puts(seq, ",inode_cache");
         return 0;
 }