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Commit 2d13d8d0 authored by Chris Mason's avatar Chris Mason Committed by David Woodhouse
Browse files

Btrfs: detect duplicate subvol names 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 2619ba1f

fs/btrfs/super.c

+2 −2
Original line number Diff line number Diff line
@@ -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;