udf: Convert udf_rmdir() to new directory iteration code

Convert udf_rmdir() to use new directory iteration code.
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/namei.c

@@ -898,30 +898,23 @@ static int empty_dir(struct inode *dir)
 
 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
 {
-	int retval;
+	int ret;
 	struct inode *inode = d_inode(dentry);
-	struct udf_fileident_bh fibh;
-	struct fileIdentDesc *fi, cfi;
+	struct udf_fileident_iter iter;
 	struct kernel_lb_addr tloc;
 
-	retval = -ENOENT;
-	fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
-	if (IS_ERR_OR_NULL(fi)) {
-		if (fi)
-			retval = PTR_ERR(fi);
+	ret = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
+	if (ret)
 		goto out;
-	}
 
-	retval = -EIO;
-	tloc = lelb_to_cpu(cfi.icb.extLocation);
+	ret = -EFSCORRUPTED;
+	tloc = lelb_to_cpu(iter.fi.icb.extLocation);
 	if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
 		goto end_rmdir;
-	retval = -ENOTEMPTY;
+	ret = -ENOTEMPTY;
 	if (!empty_dir(inode))
 		goto end_rmdir;
-	retval = udf_delete_entry(dir, fi, &fibh, &cfi);
-	if (retval)
-		goto end_rmdir;
+	udf_fiiter_delete_entry(&iter);
 	if (inode->i_nlink != 2)
 		udf_warn(inode->i_sb, "empty directory has nlink != 2 (%u)\n",
 			 inode->i_nlink);
@@ -931,14 +924,11 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
 	inode->i_ctime = dir->i_ctime = dir->i_mtime =
 						current_time(inode);
 	mark_inode_dirty(dir);
-
+	ret = 0;
 end_rmdir:
-	if (fibh.sbh != fibh.ebh)
-		brelse(fibh.ebh);
-	brelse(fibh.sbh);
-
+	udf_fiiter_release(&iter);
 out:
-	return retval;
+	return ret;
 }
 
 static int udf_unlink(struct inode *dir, struct dentry *dentry)