bsd/miscfs/volfs/volfs.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #ifndef __VOLFS_VOLFS_H__
  24 #define __VOLFS_VOLFS_H__
  25
  26 #include  <sys/appleapiopts.h>
  27
  28 #ifdef __APPLE_API_PRIVATE
  29 struct volfs_mntdata
  30 {
  31         struct vnode *volfs_rootvp;
  32 };
  33
  34 /*
  35  * Volfs vnodes exist only for the root, which allows for the enumeration
  36  * of all volfs accessible filesystems, and for the filesystems which
  37  * volfs handles.
  38  */
  39 #define VOLFS_ROOT      1       /* This volfs vnode represents root of volfs */
  40 #define VOLFS_FSNODE    2       /* This volfs vnode represents a file system */
  41
  42 struct volfs_vndata
  43 {
  44         int             vnode_type;
  45         unsigned int    nodeID; /* the dev entry of a file system */
  46         struct mount *  fs_mount;
  47         fsid_t  fs_fsid;
  48 };
  49
  50 #define MAXVLFSNAMLEN   24      /* max length is really 10, pad to 24 since
  51                                  * some of the math depends on VLFSDIRENTLEN
  52                                  * being a power of 2 */
  53 #define VLFSDIRENTLEN   (MAXVLFSNAMLEN + sizeof(u_int32_t) + sizeof(u_int16_t) + sizeof(u_int8_t) + sizeof(u_int8_t))
  54
  55 #define ROOT_DIRID      2
  56
  57 #define MAXPLCENTRIES 250
  58 #define PLCHASHSIZE 128
  59
  60
  61 #define VTOVL(VP) ((struct volfs_vndata *)((VP)->v_data))
  62
  63 #define PRINTIT kprintf
  64
  65
  66 #endif /* __APPLE_API_PRIVATE */
  67 #endif /* __VOLFS_VOLFS_H__ */