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- /*
- * 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);
- 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
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