From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 11 Apr 2007 00:07:20 +0000 (-0400)
Subject: Btrfs: detect duplicate subvol names
X-Git-Tag: firefly_0821_release~15789^2~11^2~55^2~56^2~30^2~603
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2d13d8d065cc7bbee6b1ad6ee3fe965d66badfe6;p=firefly-linux-kernel-4.4.55.git

Btrfs: detect duplicate subvol names

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 84abdde4e301..2972aaa9eb7e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1853,13 +1853,13 @@ static int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int
 		path = btrfs_alloc_path();
 		if (!path)
 			return -ENOMEM;
-		root_dirid = btrfs_root_dirid(
-				      &root->fs_info->tree_root->root_item);
+		root_dirid = root->fs_info->sb->s_root->d_inode->i_ino,
 		mutex_lock(&root->fs_info->fs_mutex);
 		ret = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root,
 				    path, root_dirid,
 				    vol_args.name, namelen, 0);
 		mutex_unlock(&root->fs_info->fs_mutex);
+		btrfs_free_path(path);
 		if (ret == 0)
 			return -EEXIST;