Btrfs: detect duplicate subvol names
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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2619ba1f0f
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2d13d8d065
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@ -1853,13 +1853,13 @@ static int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int
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path = btrfs_alloc_path();
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if (!path)
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return -ENOMEM;
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root_dirid = btrfs_root_dirid(
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&root->fs_info->tree_root->root_item);
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root_dirid = root->fs_info->sb->s_root->d_inode->i_ino,
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mutex_lock(&root->fs_info->fs_mutex);
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ret = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root,
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path, root_dirid,
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vol_args.name, namelen, 0);
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mutex_unlock(&root->fs_info->fs_mutex);
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btrfs_free_path(path);
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if (ret == 0)
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return -EEXIST;
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