bsd/vfs/vfs_conf.c

   1 /*
   2  * Copyright (c) 2000-2014 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 /*
  76  * These define the root filesystem, device, and root filesystem type.
  77  */
  78 struct mount *rootfs;
  79 struct vnode *rootvnode;
  80
  81 #ifdef CONFIG_IMGSRC_ACCESS
  82 struct vnode *imgsrc_rootvnodes[MAX_IMAGEBOOT_NESTING]; /* [0] -> source volume, [1] -> first disk image */
  83 #endif /* CONFIG_IMGSRC_ACCESS */
  84
  85 int (*mountroot)(void) = NULL;
  86
  87 /*
  88  * Set up the initial array of known filesystem types.
  89  */
  90 extern  struct vfsops mfs_vfsops;
  91 extern  int mfs_mountroot(mount_t, vnode_t, vfs_context_t);     /* dead */
  92 extern  struct vfsops nfs_vfsops;
  93 extern  int nfs_mountroot(void);
  94 extern  struct vfsops afs_vfsops;
  95 extern  struct vfsops null_vfsops;
  96 extern  struct vfsops devfs_vfsops;
  97 extern  struct vfsops routefs_vfsops;
  98 extern  struct vfsops nullfs_vfsops;
  99
 100 #if MOCKFS
 101 extern  struct vfsops mockfs_vfsops;
 102 extern  int mockfs_mountroot(mount_t, vnode_t, vfs_context_t);
 103 #endif /* MOCKFS */
 104
 105 /*
 106  * For nfs_mountroot(void) cast.  nfs_mountroot ignores its parameters, if
 107  * invoked through this table.
 108  */
 109 typedef int (*mountroot_t)(mount_t, vnode_t, vfs_context_t);
 110
 111 enum fs_type_num {
 112         FT_NFS = 2,
 113         FT_DEVFS = 19,
 114         FT_SYNTHFS = 20,
 115         FT_ROUTEFS = 21,
 116         FT_NULLFS = 22,
 117         FT_MOCKFS  = 0x6D6F636B
 118 };
 119
 120 /*
 121  * Set up the filesystem operations for vnodes.
 122  */
 123 static struct vfstable vfstbllist[] = {
 124         /* Sun-compatible Network Filesystem */
 125 #if NFSCLIENT
 126         { &nfs_vfsops, "nfs", FT_NFS, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFC_VFSPREFLIGHT | VFC_VFS64BITREADY | VFC_VFSREADDIR_EXTENDED, NULL, 0, NULL},
 127 #endif
 128
 129         /* Device Filesystem */
 130 #if DEVFS
 131 #if CONFIG_MACF
 132         { &devfs_vfsops, "devfs", FT_DEVFS, 0, MNT_MULTILABEL, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFC_VFS64BITREADY, NULL, 0, NULL},
 133 #else
 134         { &devfs_vfsops, "devfs", FT_DEVFS, 0, 0, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFC_VFS64BITREADY, NULL, 0, NULL},
 135 #endif /* MAC */
 136 #endif
 137
 138 #ifndef __LP64__
 139 #endif /* __LP64__ */
 140
 141 #if NULLFS
 142         { &nullfs_vfsops, "nullfs", FT_NULLFS, 0, (MNT_DONTBROWSE | MNT_RDONLY), NULL, NULL, 0, 0, VFC_VFS64BITREADY, NULL, 0, NULL},
 143 #endif /* NULLFS */
 144
 145 #if MOCKFS
 146         /* If we are configured for it, mockfs should always be the last standard entry (and thus the last FS we attempt mountroot with) */
 147         { &mockfs_vfsops, "mockfs", FT_MOCKFS, 0, MNT_LOCAL, mockfs_mountroot, NULL, 0, 0, VFC_VFSGENERICARGS, NULL, 0, NULL},
 148 #endif /* MOCKFS */
 149
 150 #if ROUTEFS
 151         /* If we are configured for it, mockfs should always be the last standard entry (and thus the last FS we attempt mountroot with) */
 152         { &routefs_vfsops, "routefs", FT_ROUTEFS, 0, MNT_LOCAL, NULL, NULL, 0, 0, VFC_VFSGENERICARGS | VFC_VFS64BITREADY, NULL, 0, NULL},
 153 #endif /* ROUTEFS */
 154         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0, NULL},
 155         {NULL, "<unassigned>", 0, 0, 0, NULL, NULL, 0, 0, 0, NULL, 0, NULL},
 156 };
 157
 158 /*
 159  * vfs_init will set maxvfstypenum to the highest defined type number.
 160  */
 161 const int maxvfsslots = sizeof(vfstbllist) / sizeof (struct vfstable);
 162 int numused_vfsslots = 0;
 163 int numregistered_fses = 0;
 164 int maxvfstypenum = VT_NON + 1;
 165 struct vfstable *vfsconf = vfstbllist;
 166
 167 /*
 168  *
 169  * vfs_opv_descs enumerates the list of vnode classes, each with it's own
 170  * vnode operation vector.  It is consulted at system boot to build operation
 171  * vectors.  It is NULL terminated.
 172  *
 173  */
 174 extern struct vnodeopv_desc mfs_vnodeop_opv_desc;
 175 extern struct vnodeopv_desc dead_vnodeop_opv_desc;
 176 #if FIFO && SOCKETS
 177 extern struct vnodeopv_desc fifo_vnodeop_opv_desc;
 178 #endif /* SOCKETS */
 179 extern struct vnodeopv_desc spec_vnodeop_opv_desc;
 180 extern struct vnodeopv_desc nfsv2_vnodeop_opv_desc;
 181 extern struct vnodeopv_desc spec_nfsv2nodeop_opv_desc;
 182 extern struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc;
 183 extern struct vnodeopv_desc nfsv4_vnodeop_opv_desc;
 184 extern struct vnodeopv_desc spec_nfsv4nodeop_opv_desc;
 185 extern struct vnodeopv_desc fifo_nfsv4nodeop_opv_desc;
 186 extern struct vnodeopv_desc null_vnodeop_opv_desc;
 187 extern struct vnodeopv_desc devfs_vnodeop_opv_desc;
 188 extern struct vnodeopv_desc devfs_spec_vnodeop_opv_desc;
 189 #if FDESC
 190 extern struct vnodeopv_desc devfs_devfd_vnodeop_opv_desc;
 191 extern struct vnodeopv_desc devfs_fdesc_vnodeop_opv_desc;
 192 #endif /* FDESC */
 193
 194 #if MOCKFS
 195 extern struct vnodeopv_desc mockfs_vnodeop_opv_desc;
 196 #endif /* MOCKFS */
 197
 198 extern struct vnodeopv_desc nullfs_vnodeop_opv_desc;
 199
 200 struct vnodeopv_desc *vfs_opv_descs[] = {
 201         &dead_vnodeop_opv_desc,
 202 #if FIFO && SOCKETS
 203         &fifo_vnodeop_opv_desc,
 204 #endif
 205         &spec_vnodeop_opv_desc,
 206 #if MFS
 207         &mfs_vnodeop_opv_desc,
 208 #endif
 209 #if NFSCLIENT
 210         &nfsv2_vnodeop_opv_desc,
 211         &spec_nfsv2nodeop_opv_desc,
 212         &nfsv4_vnodeop_opv_desc,
 213         &spec_nfsv4nodeop_opv_desc,
 214 #if FIFO
 215         &fifo_nfsv2nodeop_opv_desc,
 216         &fifo_nfsv4nodeop_opv_desc,
 217 #endif
 218 #endif
 219 #if DEVFS
 220         &devfs_vnodeop_opv_desc,
 221         &devfs_spec_vnodeop_opv_desc,
 222 #if FDESC
 223         &devfs_devfd_vnodeop_opv_desc,
 224         &devfs_fdesc_vnodeop_opv_desc,
 225 #endif /* FDESC */
 226 #endif /* DEVFS */
 227 #if NULLFS
 228         &nullfs_vnodeop_opv_desc,
 229 #endif /* NULLFS */
 230 #if MOCKFS
 231         &mockfs_vnodeop_opv_desc,
 232 #endif /* MOCKFS */
 233         NULL
 234 };