bsd/vfs/vfs_conf.c

   1 /*
   2  * Copyright (c) 2000-2007 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 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1989, 1993, 1995
  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  *      @(#)vfs_conf.c  8.11 (Berkeley) 5/10/95
  62  */
  63 /*
  64  * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
  65  * support for mandatory and extensible security protections.  This notice
  66  * is included in support of clause 2.2 (b) of the Apple Public License,
  67  * Version 2.0.
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/systm.h>
  72 #include <sys/mount_internal.h>
  73 #include <sys/vnode_internal.h>
  74
  75 #ifndef __LP64__
  76 #define VFS_THREAD_SAFE_FLAG VFC_VFSTHREADSAFE /* This is only defined for 32-bit */
  77 #else
  78 #define VFS_THREAD_SAFE_FLAG 0
  79 #endif /* __LP64__  */
  80
  81
  82 /*
  83  * These define the root filesystem, device, and root filesystem type.
  84  */
  85 struct mount *rootfs;
  86 struct vnode *rootvnode;
  87 int (*mountroot)(void) = NULL;
  88
  89 /*
  90  * Set up the initial array of known filesystem types.
  91  */
  92 extern  struct vfsops mfs_vfsops;
  93 extern  int mfs_mountroot(mount_t, vnode_t, vfs_context_t);     /* dead */
  94 extern  struct vfsops hfs_vfsops;
  95 extern  int hfs_mountroot(mount_t, vnode_t, vfs_context_t);
  96 extern  struct vfsops nfs_vfsops;
  97 extern  int nfs_mountroot(void);
  98 extern  struct vfsops afs_vfsops;
  99 extern  struct vfsops null_vfsops;
 100 extern  struct vfsops union_vfsops;
 101 extern  struct vfsops devfs_vfsops;
 102
 103 /*
 104  * For nfs_mountroot(void) cast.  nfs_mountroot ignores its parameters, if
 105  * invoked through this table.
 106  */
 107 typedef int (*mountroot_t)(mount_t, vnode_t, vfs_context_t);
 108
 109 /*
 110  * Set up the filesystem operations for vnodes.
 111  */
 112 static struct vfstable vfstbllist[] = {
 113         /* HFS/HFS+ Filesystem */
 114 #if HFS
 115         { &hfs_vfsops, "hfs", 17, 0, (MNT_LOCAL | MNT_DOVOLFS), hfs_mountroot, NULL, 0, 0, VFC_VFSLOCALARGS | VFC_VFSREADDIR_EXTENDED | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY | VFC_VFSVNOP_PAGEOUTV2, NULL, 0},
 116 #endif
 117
 118         /* Memory-based Filesystem */
 119
 120 #ifndef __LP64__
 121 #if MFS
 122         { &mfs_vfsops, "mfs", 3, 0, MNT_LOCAL, mfs_mountroot, NULL, 0, 0, VFC_VFSGENERICARGS, NULL, 0},
 123 #endif
 124 #endif /* __LP64__ */
 125
 126         /* Sun-compatible Network Filesystem */
 127 #if NFSCLIENT
 128         { &nfs_vfsops, "nfs", 2, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFC_VFSPREFLIGHT | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY | VFC_VFSREADDIR_EXTENDED, NULL, 0},
 129 #endif
 130
 131         /* Andrew Filesystem */
 132 #ifndef __LP64__
 133 #if AFS
 134         { &afs_vfsops, "andrewfs", 13, 0, 0, afs_mountroot, NULL, 0, 0, VFC_VFSGENERICARGS , NULL, 0},
 135 #endif
 136 #endif /* __LP64__ */
 137
 138         /* Loopback (Minimal) Filesystem Layer */
 139 #ifndef __LP64__
 140 #if NULLFS
 141         { &null_vfsops, "loopback", 9, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS , NULL, 0},
 142 #endif
 143 #endif /* __LP64__ */
 144
 145         /* Union (translucent) Filesystem */
 146 #if UNION
 147         { &union_vfsops, "unionfs", 15, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY, NULL, 0},
 148 #endif
 149
 150         /* Device Filesystem */
 151 #if DEVFS
 152 #if CONFIG_MACF
 153         { &devfs_vfsops, "devfs", 19, 0, (MNT_DONTBROWSE | MNT_MULTILABEL), NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY, NULL, 0},
 154 #else
 155         { &devfs_vfsops, "devfs", 19, 0, MNT_DONTBROWSE, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY, NULL, 0},
 156 #endif /* MAC */
 157 #endif
 158
 159 #ifndef __LP64__
 160 #endif /* __LP64__ */
 161
 162         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 163         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 164         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 165         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 166         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 167         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 168         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 169         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 170         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 171         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 172         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 173         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 174         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 175         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 176         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0}
 177 };
 178
 179 /*
 180  * Initially the size of the list, vfs_init will set maxvfsconf
 181  * to the highest defined type number.
 182  */
 183 int maxvfsslots = sizeof(vfstbllist) / sizeof (struct vfstable);
 184 int numused_vfsslots = 0;
 185 int maxvfsconf = sizeof(vfstbllist) / sizeof (struct vfstable);
 186 struct vfstable *vfsconf = vfstbllist;
 187
 188 /*
 189  *
 190  * vfs_opv_descs enumerates the list of vnode classes, each with it's own
 191  * vnode operation vector.  It is consulted at system boot to build operation
 192  * vectors.  It is NULL terminated.
 193  *
 194  */
 195 extern struct vnodeopv_desc mfs_vnodeop_opv_desc;
 196 extern struct vnodeopv_desc dead_vnodeop_opv_desc;
 197 #if FIFO && SOCKETS
 198 extern struct vnodeopv_desc fifo_vnodeop_opv_desc;
 199 #endif /* SOCKETS */
 200 extern struct vnodeopv_desc spec_vnodeop_opv_desc;
 201 extern struct vnodeopv_desc nfsv2_vnodeop_opv_desc;
 202 extern struct vnodeopv_desc spec_nfsv2nodeop_opv_desc;
 203 extern struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc;
 204 extern struct vnodeopv_desc nfsv4_vnodeop_opv_desc;
 205 extern struct vnodeopv_desc spec_nfsv4nodeop_opv_desc;
 206 extern struct vnodeopv_desc fifo_nfsv4nodeop_opv_desc;
 207 extern struct vnodeopv_desc null_vnodeop_opv_desc;
 208 extern struct vnodeopv_desc hfs_vnodeop_opv_desc;
 209 extern struct vnodeopv_desc hfs_std_vnodeop_opv_desc;
 210 extern struct vnodeopv_desc hfs_specop_opv_desc;
 211 extern struct vnodeopv_desc hfs_fifoop_opv_desc;
 212 extern struct vnodeopv_desc union_vnodeop_opv_desc;
 213 extern struct vnodeopv_desc devfs_vnodeop_opv_desc;
 214 extern struct vnodeopv_desc devfs_spec_vnodeop_opv_desc;
 215 #if FDESC
 216 extern struct vnodeopv_desc devfs_devfd_vnodeop_opv_desc;
 217 extern struct vnodeopv_desc devfs_fdesc_vnodeop_opv_desc;
 218 #endif /* FDESC */
 219
 220 struct vnodeopv_desc *vfs_opv_descs[] = {
 221         &dead_vnodeop_opv_desc,
 222 #if FIFO && SOCKETS
 223         &fifo_vnodeop_opv_desc,
 224 #endif
 225         &spec_vnodeop_opv_desc,
 226 #if MFS
 227         &mfs_vnodeop_opv_desc,
 228 #endif
 229 #if NFSCLIENT
 230         &nfsv2_vnodeop_opv_desc,
 231         &spec_nfsv2nodeop_opv_desc,
 232         &nfsv4_vnodeop_opv_desc,
 233         &spec_nfsv4nodeop_opv_desc,
 234 #if FIFO
 235         &fifo_nfsv2nodeop_opv_desc,
 236         &fifo_nfsv4nodeop_opv_desc,
 237 #endif
 238 #endif
 239 #if NULLFS
 240         &null_vnodeop_opv_desc,
 241 #endif
 242 #if HFS
 243         &hfs_vnodeop_opv_desc,
 244         &hfs_std_vnodeop_opv_desc,
 245         &hfs_specop_opv_desc,
 246 #if FIFO
 247         &hfs_fifoop_opv_desc,
 248 #endif
 249 #endif
 250 #if UNION
 251         &union_vnodeop_opv_desc,
 252 #endif
 253 #if DEVFS
 254         &devfs_vnodeop_opv_desc,
 255         &devfs_spec_vnodeop_opv_desc,
 256 #if FDESC
 257         &devfs_devfd_vnodeop_opv_desc,
 258         &devfs_fdesc_vnodeop_opv_desc,
 259 #endif /* FDESC */
 260 #endif /* DEVFS */
 261         NULL
 262 };