42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __HASH__
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#define __HASH__
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int __init btrfs_hash_init(void);
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void btrfs_hash_exit(void);
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u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length);
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static inline u64 btrfs_name_hash(const char *name, int len)
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{
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return btrfs_crc32c((u32)~1, name, len);
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}
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/*
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* Figure the key offset of an extended inode ref
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*/
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static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
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int len)
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{
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return (u64) btrfs_crc32c(parent_objectid, name, len);
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}
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#endif
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