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
  88 #ifdef CONFIG_IMGSRC_ACCESS
  89 struct vnode *imgsrc_rootvnode;
  90 #endif /* IMGSRC_ACESS */
  91
  92 int (*mountroot)(void) = NULL;
  93
  94 /*
  95  * Set up the initial array of known filesystem types.
  96  */
  97 extern  struct vfsops mfs_vfsops;
  98 extern  int mfs_mountroot(mount_t, vnode_t, vfs_context_t);     /* dead */
  99 extern  struct vfsops hfs_vfsops;
 100 extern  int hfs_mountroot(mount_t, vnode_t, vfs_context_t);
 101 extern  struct vfsops nfs_vfsops;
 102 extern  int nfs_mountroot(void);
 103 extern  struct vfsops afs_vfsops;
 104 extern  struct vfsops null_vfsops;
 105 extern  struct vfsops union_vfsops;
 106 extern  struct vfsops devfs_vfsops;
 107
 108 /*
 109  * For nfs_mountroot(void) cast.  nfs_mountroot ignores its parameters, if
 110  * invoked through this table.
 111  */
 112 typedef int (*mountroot_t)(mount_t, vnode_t, vfs_context_t);
 113
 114 /*
 115  * Set up the filesystem operations for vnodes.
 116  */
 117 static struct vfstable vfstbllist[] = {
 118         /* HFS/HFS+ Filesystem */
 119 #if HFS
 120         { &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},
 121 #endif
 122
 123         /* Memory-based Filesystem */
 124
 125 #ifndef __LP64__
 126 #if MFS
 127         { &mfs_vfsops, "mfs", 3, 0, MNT_LOCAL, mfs_mountroot, NULL, 0, 0, VFC_VFSGENERICARGS, NULL, 0},
 128 #endif
 129 #endif /* __LP64__ */
 130
 131         /* Sun-compatible Network Filesystem */
 132 #if NFSCLIENT
 133         { &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},
 134 #endif
 135
 136         /* Andrew Filesystem */
 137 #ifndef __LP64__
 138 #if AFS
 139         { &afs_vfsops, "andrewfs", 13, 0, 0, afs_mountroot, NULL, 0, 0, VFC_VFSGENERICARGS , NULL, 0},
 140 #endif
 141 #endif /* __LP64__ */
 142
 143         /* Loopback (Minimal) Filesystem Layer */
 144 #ifndef __LP64__
 145 #if NULLFS
 146         { &null_vfsops, "loopback", 9, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS , NULL, 0},
 147 #endif
 148 #endif /* __LP64__ */
 149
 150         /* Union (translucent) Filesystem */
 151 #if UNION
 152         { &union_vfsops, "unionfs", 15, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY, NULL, 0},
 153 #endif
 154
 155         /* Device Filesystem */
 156 #if DEVFS
 157 #if CONFIG_MACF
 158         { &devfs_vfsops, "devfs", 19, 0, (MNT_DONTBROWSE | MNT_MULTILABEL), NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY, NULL, 0},
 159 #else
 160         { &devfs_vfsops, "devfs", 19, 0, MNT_DONTBROWSE, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFS_THREAD_SAFE_FLAG | VFC_VFS64BITREADY, NULL, 0},
 161 #endif /* MAC */
 162 #endif
 163
 164 #ifndef __LP64__
 165 #endif /* __LP64__ */
 166
 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         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 178         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 179         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 180         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0},
 181         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0}
 182 };
 183
 184 /*
 185  * Initially the size of the list, vfs_init will set maxvfsconf
 186  * to the highest defined type number.
 187  */
 188 int maxvfsslots = sizeof(vfstbllist) / sizeof (struct vfstable);
 189 int numused_vfsslots = 0;
 190 int maxvfsconf = sizeof(vfstbllist) / sizeof (struct vfstable);
 191 struct vfstable *vfsconf = vfstbllist;
 192
 193 /*
 194  *
 195  * vfs_opv_descs enumerates the list of vnode classes, each with it's own
 196  * vnode operation vector.  It is consulted at system boot to build operation
 197  * vectors.  It is NULL terminated.
 198  *
 199  */
 200 extern struct vnodeopv_desc mfs_vnodeop_opv_desc;
 201 extern struct vnodeopv_desc dead_vnodeop_opv_desc;
 202 #if FIFO && SOCKETS
 203 extern struct vnodeopv_desc fifo_vnodeop_opv_desc;
 204 #endif /* SOCKETS */
 205 extern struct vnodeopv_desc spec_vnodeop_opv_desc;
 206 extern struct vnodeopv_desc nfsv2_vnodeop_opv_desc;
 207 extern struct vnodeopv_desc spec_nfsv2nodeop_opv_desc;
 208 extern struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc;
 209 extern struct vnodeopv_desc nfsv4_vnodeop_opv_desc;
 210 extern struct vnodeopv_desc spec_nfsv4nodeop_opv_desc;
 211 extern struct vnodeopv_desc fifo_nfsv4nodeop_opv_desc;
 212 extern struct vnodeopv_desc null_vnodeop_opv_desc;
 213 extern struct vnodeopv_desc hfs_vnodeop_opv_desc;
 214 extern struct vnodeopv_desc hfs_std_vnodeop_opv_desc;
 215 extern struct vnodeopv_desc hfs_specop_opv_desc;
 216 extern struct vnodeopv_desc hfs_fifoop_opv_desc;
 217 extern struct vnodeopv_desc union_vnodeop_opv_desc;
 218 extern struct vnodeopv_desc devfs_vnodeop_opv_desc;
 219 extern struct vnodeopv_desc devfs_spec_vnodeop_opv_desc;
 220 #if FDESC
 221 extern struct vnodeopv_desc devfs_devfd_vnodeop_opv_desc;
 222 extern struct vnodeopv_desc devfs_fdesc_vnodeop_opv_desc;
 223 #endif /* FDESC */
 224
 225 struct vnodeopv_desc *vfs_opv_descs[] = {
 226         &dead_vnodeop_opv_desc,
 227 #if FIFO && SOCKETS
 228         &fifo_vnodeop_opv_desc,
 229 #endif
 230         &spec_vnodeop_opv_desc,
 231 #if MFS
 232         &mfs_vnodeop_opv_desc,
 233 #endif
 234 #if NFSCLIENT
 235         &nfsv2_vnodeop_opv_desc,
 236         &spec_nfsv2nodeop_opv_desc,
 237         &nfsv4_vnodeop_opv_desc,
 238         &spec_nfsv4nodeop_opv_desc,
 239 #if FIFO
 240         &fifo_nfsv2nodeop_opv_desc,
 241         &fifo_nfsv4nodeop_opv_desc,
 242 #endif
 243 #endif
 244 #if NULLFS
 245         &null_vnodeop_opv_desc,
 246 #endif
 247 #if HFS
 248         &hfs_vnodeop_opv_desc,
 249         &hfs_std_vnodeop_opv_desc,
 250         &hfs_specop_opv_desc,
 251 #if FIFO
 252         &hfs_fifoop_opv_desc,
 253 #endif
 254 #endif
 255 #if UNION
 256         &union_vnodeop_opv_desc,
 257 #endif
 258 #if DEVFS
 259         &devfs_vnodeop_opv_desc,
 260         &devfs_spec_vnodeop_opv_desc,
 261 #if FDESC
 262         &devfs_devfd_vnodeop_opv_desc,
 263         &devfs_fdesc_vnodeop_opv_desc,
 264 #endif /* FDESC */
 265 #endif /* DEVFS */
 266         NULL
 267 };