core/hfs_btreeio.h

   1 /*
   2  * Copyright (c) 2005-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #ifndef _HFS_BTREEIO_H_
  29 #define _HFS_BTREEIO_H_
  30
  31 #include <sys/appleapiopts.h>
  32
  33 #ifdef KERNEL
  34 #ifdef __APPLE_API_PRIVATE
  35
  36 #include "hfs.h"
  37 #include "BTreesInternal.h"
  38
  39 /* BTree accessor routines */
  40 extern OSStatus SetBTreeBlockSize(FileReference vp, ByteCount blockSize,
  41                                 ItemCount minBlockCount);
  42
  43 extern OSStatus GetBTreeBlock(FileReference vp, u_int32_t blockNum,
  44                                 GetBlockOptions options, BlockDescriptor *block);
  45
  46 extern OSStatus ReleaseBTreeBlock(FileReference vp, BlockDescPtr blockPtr,
  47                                 ReleaseBlockOptions options);
  48
  49 extern OSStatus ExtendBTreeFile(FileReference vp, FSSize minEOF, FSSize maxEOF);
  50
  51 extern void ModifyBlockStart(FileReference vp, BlockDescPtr blockPtr);
  52
  53 int hfs_create_attr_btree(struct hfsmount *hfsmp, u_int32_t nodesize, u_int32_t nodecnt);
  54
  55 u_int16_t get_btree_nodesize(struct vnode *vp);
  56
  57 #endif /* __APPLE_API_PRIVATE */
  58 #endif /* KERNEL */
  59 #endif /* ! _HFS_BTREEIO_H_ */