bsd/miscfs/volfs/volfs.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30
  31 #ifndef __VOLFS_VOLFS_H__
  32 #define __VOLFS_VOLFS_H__
  33
  34 #include  <sys/appleapiopts.h>
  35
  36 #ifdef __APPLE_API_PRIVATE
  37 struct volfs_mntdata
  38 {
  39         struct vnode *volfs_rootvp;
  40 };
  41
  42 /*
  43  * Volfs vnodes exist only for the root, which allows for the enumeration
  44  * of all volfs accessible filesystems, and for the filesystems which
  45  * volfs handles.
  46  */
  47 #define VOLFS_ROOT      1       /* This volfs vnode represents root of volfs */
  48 #define VOLFS_FSNODE    2       /* This volfs vnode represents a file system */
  49
  50 struct volfs_vndata
  51 {
  52         int             vnode_type;
  53         unsigned int    nodeID; /* the dev entry of a file system */
  54         struct mount *  fs_mount;
  55         fsid_t  fs_fsid;
  56 };
  57
  58 #define MAXVLFSNAMLEN   24      /* max length is really 10, pad to 24 since
  59                                  * some of the math depends on VLFSDIRENTLEN
  60                                  * being a power of 2 */
  61 #define VLFSDIRENTLEN   (MAXVLFSNAMLEN + sizeof(u_int32_t) + sizeof(u_int16_t) + sizeof(u_int8_t) + sizeof(u_int8_t))
  62
  63 #define ROOT_DIRID      2
  64
  65 #define MAXPLCENTRIES 250
  66 #define PLCHASHSIZE 128
  67
  68
  69 #define VTOVL(VP) ((struct volfs_vndata *)((VP)->v_data))
  70
  71 #define PRINTIT kprintf
  72
  73
  74 #endif /* __APPLE_API_PRIVATE */
  75 #endif /* __VOLFS_VOLFS_H__ */