1/* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19#ifndef __HASH__ 20#define __HASH__ 21 22#include <linux/crc32c.h> 23static inline u64 btrfs_name_hash(const char *name, int len) 24{ 25 return crc32c((u32)~1, name, len); 26} 27 28/* 29 * Figure the key offset of an extended inode ref 30 */ 31static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 32 int len) 33{ 34 return (u64) crc32c(parent_objectid, name, len); 35} 36 37#endif 38