btrfs-progs: check: original mode: Check inline extent size

[platform/upstream/btrfs-progs.git] / hash.h

diff --git a/hash.h b/hash.h
index e56c467..9ff6761 100644 (file)
--- a/hash.h
+++ b/hash.h
@@ -1,4 +1,38 @@
-#ifndef __HASH__
-#define __HASH__
-int btrfs_name_hash(const char *name, int len, u64 *hash_result);
+/*
+ * Copyright (C) 2007 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_HASH_H__
+#define __BTRFS_HASH_H__
+
+#include "crc32c.h"
+
+static inline u64 btrfs_name_hash(const char *name, int len)
+{
+       return crc32c((u32)~1, name, len);
+}
+
+/*
+ * Figure the key offset of an extended inode ref
+ */
+static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
+                                   int len)
+{
+       return (u64)btrfs_crc32c(parent_objectid, name, len);
+}
+
 #endif