Btrfs: show subvol= and subvolid= in /proc/mounts

[cascardo/linux.git] / fs / btrfs / super.c

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6fa4aaf..cd7ef34 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1188,6 +1188,10 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
                seq_puts(seq, ",fatal_errors=panic");
        if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL)
                seq_printf(seq, ",commit=%d", info->commit_interval);
+       seq_printf(seq, ",subvolid=%llu",
+                 BTRFS_I(d_inode(dentry))->root->root_key.objectid);
+       seq_puts(seq, ",subvol=");
+       seq_dentry(seq, dentry, " \t\n\\");
        return 0;
 }