bsd/miscfs/specfs/specdev.h

   1 /*
   2  * Copyright (c) 2000-2002 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  * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
  30  * Copyright (c) 1990, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)specdev.h   8.6 (Berkeley) 5/21/95
  62  */
  63
  64 #ifndef _MISCFS_SPECFS_SPECDEV_H_
  65 #define _MISCFS_SPECFS_SPECDEV_H_
  66
  67 #include  <sys/appleapiopts.h>
  68
  69 #ifdef __APPLE_API_PRIVATE
  70 #include <vfs/vfs_support.h>
  71
  72 /*
  73  * This structure defines the information maintained about
  74  * special devices. It is allocated in checkalias and freed
  75  * in vgone.
  76  */
  77 struct specinfo {
  78         struct  vnode **si_hashchain;
  79         struct  vnode *si_specnext;
  80         long    si_flags;
  81         dev_t   si_rdev;
  82         daddr_t si_size;                /* device block size in bytes */
  83         daddr64_t       si_lastr;       /* last read blkno (read-ahead) */
  84         u_int64_t       si_devsize;     /* actual device size in bytes */
  85 };
  86 /*
  87  * Exported shorthand
  88  */
  89 #define v_rdev v_specinfo->si_rdev
  90 #define v_hashchain v_specinfo->si_hashchain
  91 #define v_specnext v_specinfo->si_specnext
  92 #define v_specflags v_specinfo->si_flags
  93 #define v_specsize v_specinfo->si_size
  94 #define v_specdevsize v_specinfo->si_devsize
  95 #define v_speclastr v_specinfo->si_lastr
  96
  97 /*
  98  * Flags for specinfo
  99  */
 100 #define SI_MOUNTEDON    0x0001  /* block special device is mounted on */
 101
 102 /*
 103  * Special device management
 104  */
 105 #define SPECHSZ 64
 106 #if     ((SPECHSZ&(SPECHSZ-1)) == 0)
 107 #define SPECHASH(rdev)  (((rdev>>5)+(rdev))&(SPECHSZ-1))
 108 #else
 109 #define SPECHASH(rdev)  (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
 110 #endif
 111
 112 extern struct vnode *speclisth[SPECHSZ];
 113
 114 /*
 115  * Prototypes for special file operations on vnodes.
 116  */
 117 extern  int (**spec_vnodeop_p)(void *);
 118 struct  nameidata;
 119 struct  componentname;
 120 struct  ucred;
 121 struct  flock;
 122 struct  buf;
 123 struct  uio;
 124
 125 int     spec_ebadf(void *);
 126
 127 int     spec_lookup (struct vnop_lookup_args *);
 128 #define spec_create (int (*) (struct  vnop_access_args *))err_create
 129 #define spec_mknod (int (*) (struct  vnop_access_args *))err_mknod
 130 int     spec_open (struct vnop_open_args *);
 131 int     spec_close (struct vnop_close_args *);
 132 #define spec_access (int (*) (struct  vnop_access_args *))spec_ebadf
 133 #define spec_getattr (int (*) (struct  vnop_getattr_args *))spec_ebadf
 134 #define spec_setattr (int (*) (struct  vnop_setattr_args *))spec_ebadf
 135 int     spec_read (struct vnop_read_args *);
 136 int     spec_write (struct vnop_write_args *);
 137 int     spec_ioctl (struct vnop_ioctl_args *);
 138 int     spec_select (struct vnop_select_args *);
 139 #define spec_revoke (int (*) (struct  vnop_access_args *))nop_revoke
 140 #define spec_mmap (int (*) (struct  vnop_access_args *))err_mmap
 141 int     spec_fsync (struct  vnop_fsync_args *);
 142 int     spec_fsync_internal (vnode_t, int, vfs_context_t);
 143 #define spec_remove (int (*) (struct  vnop_access_args *))err_remove
 144 #define spec_link (int (*) (struct  vnop_access_args *))err_link
 145 #define spec_rename (int (*) (struct  vnop_access_args *))err_rename
 146 #define spec_mkdir (int (*) (struct  vnop_access_args *))err_mkdir
 147 #define spec_rmdir (int (*) (struct  vnop_access_args *))err_rmdir
 148 #define spec_symlink (int (*) (struct  vnop_access_args *))err_symlink
 149 #define spec_readdir (int (*) (struct  vnop_access_args *))err_readdir
 150 #define spec_readlink (int (*) (struct  vnop_access_args *))err_readlink
 151 #define spec_inactive (int (*) (struct  vnop_access_args *))nop_inactive
 152 #define spec_reclaim (int (*) (struct  vnop_access_args *))nop_reclaim
 153 #define spec_lock (int (*) (struct  vnop_access_args *))nop_lock
 154 #define spec_unlock (int (*)(struct  vnop_access_args *))nop_unlock
 155 int     spec_strategy (struct vnop_strategy_args *);
 156 #define spec_islocked (int (*) (struct  vnop_access_args *))nop_islocked
 157 int     spec_pathconf (struct vnop_pathconf_args *);
 158 #define spec_advlock (int (*) (struct  vnop_access_args *))err_advlock
 159 #define spec_blkatoff (int (*) (struct  vnop_access_args *))err_blkatoff
 160 #define spec_valloc (int (*) (struct  vnop_access_args *))err_valloc
 161 #define spec_vfree (int (*) (struct  vnop_access_args *))err_vfree
 162 #define spec_bwrite (int (*) (struct  vnop_bwrite_args *))nop_bwrite
 163 int     spec_devblocksize (struct vnop_devblocksize_args *);
 164 int spec_blktooff (struct  vnop_blktooff_args *);
 165 int spec_offtoblk (struct  vnop_offtoblk_args *);
 166 int spec_blockmap (struct  vnop_blockmap_args *);
 167
 168 #endif /* __APPLE_API_PRIVATE */
 169 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */