projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 6cbd5570 CM |
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 | ||
| 24af03ea CM |
19 | #ifndef __HASH__ |
| 20 | #define __HASH__ | |
| 615f996f | 21 | |
| 163e783e | 22 | #include <linux/crc32c.h> |
| 615f996f DW |
23 | static inline u64 btrfs_name_hash(const char *name, int len) |
| 24 | { | |
| 163e783e | 25 | return crc32c((u32)~1, name, len); |
| 615f996f | 26 | } |
| f186373f MF |
27 | |
| 28 | /* | |
| 29 | * Figure the key offset of an extended inode ref | |
| 30 | */ | |
| 31 | static 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 | ||
| 24af03ea | 37 | #endif |