| /* | |
| * 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 __HASH__ | |
| #define __HASH__ | |
| int __init btrfs_hash_init(void); | |
| void btrfs_hash_exit(void); | |
| const char* btrfs_crc32c_impl(void); | |
| u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length); | |
| static inline u64 btrfs_name_hash(const char *name, int len) | |
| { | |
| return btrfs_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 |