bsd/miscfs/volfs/volfs.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, 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
  29 #ifndef __VOLFS_VOLFS_H__
  30 #define __VOLFS_VOLFS_H__
  31
  32 #include  <sys/appleapiopts.h>
  33
  34 #ifdef __APPLE_API_PRIVATE
  35 struct volfs_mntdata
  36 {
  37         struct vnode *volfs_rootvp;
  38 };
  39
  40 /*
  41  * Volfs vnodes exist only for the root, which allows for the enumeration
  42  * of all volfs accessible filesystems, and for the filesystems which
  43  * volfs handles.
  44  */
  45 #define VOLFS_ROOT      1       /* This volfs vnode represents root of volfs */
  46 #define VOLFS_FSNODE    2       /* This volfs vnode represents a file system */
  47
  48 struct volfs_vndata
  49 {
  50         int             vnode_type;
  51         unsigned int    nodeID; /* the dev entry of a file system */
  52         struct mount *  fs_mount;
  53         fsid_t  fs_fsid;
  54 };
  55
  56 #define MAXVLFSNAMLEN   24      /* max length is really 10, pad to 24 since
  57                                  * some of the math depends on VLFSDIRENTLEN
  58                                  * being a power of 2 */
  59 #define VLFSDIRENTLEN   (MAXVLFSNAMLEN + sizeof(u_int32_t) + sizeof(u_int16_t) + sizeof(u_int8_t) + sizeof(u_int8_t))
  60
  61 #define ROOT_DIRID      2
  62
  63 #define MAXPLCENTRIES 250
  64 #define PLCHASHSIZE 128
  65
  66
  67 #define VTOVL(VP) ((struct volfs_vndata *)((VP)->v_data))
  68
  69 #define PRINTIT kprintf
  70
  71
  72 #endif /* __APPLE_API_PRIVATE */
  73 #endif /* __VOLFS_VOLFS_H__ */