bsd/ufs/ufs/ufs_vfsops.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1991, 1993, 1994
  33  *      The Regents of the University of California.  All rights reserved.
  34  * (c) UNIX System Laboratories, Inc.
  35  * All or some portions of this file are derived from material licensed
  36  * to the University of California by American Telephone and Telegraph
  37  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  38  * the permission of UNIX System Laboratories, Inc.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. All advertising materials mentioning features or use of this software
  49  *    must display the following acknowledgement:
  50  *      This product includes software developed by the University of
  51  *      California, Berkeley and its contributors.
  52  * 4. Neither the name of the University nor the names of its contributors
  53  *    may be used to endorse or promote products derived from this software
  54  *    without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  66  * SUCH DAMAGE.
  67  *
  68  *      @(#)ufs_vfsops.c        8.8 (Berkeley) 5/20/95
  69  */
  70
  71 #include <sys/param.h>
  72 #include <sys/mbuf.h>
  73 #include <sys/mount_internal.h>
  74 #include <sys/proc.h>
  75 #include <sys/vnode_internal.h>
  76 #include <sys/malloc.h>
  77 #include <sys/quota.h>
  78
  79 #include <miscfs/specfs/specdev.h>
  80
  81 #include <ufs/ufs/quota.h>
  82 #include <ufs/ufs/inode.h>
  83 #include <ufs/ufs/ufsmount.h>
  84 #include <ufs/ufs/ufs_extern.h>
  85
  86 /*
  87  * Make a filesystem operational.
  88  * Nothing to do at the moment.
  89  */
  90 /* ARGSUSED */
  91 int
  92 ufs_start(mp, flags, context)
  93         struct mount *mp;
  94         int flags;
  95         vfs_context_t context;
  96 {
  97
  98         return (0);
  99 }
 100
 101 /*
 102  * Return the root of a filesystem.
 103  */
 104 int
 105 ufs_root(mp, vpp, context)
 106         struct mount *mp;
 107         struct vnode **vpp;
 108         vfs_context_t context;
 109 {
 110         struct vnode *nvp;
 111         int error;
 112
 113         if (error = VFS_VGET(mp, (ino64_t)ROOTINO, &nvp, context))
 114                 return (error);
 115         *vpp = nvp;
 116         return (0);
 117 }
 118
 119 /*
 120  * Do operations associated with quotas
 121  */
 122 int
 123 ufs_quotactl(mp, cmds, uid, datap, context)
 124         struct mount *mp;
 125         int cmds;
 126         uid_t uid;
 127         caddr_t datap;
 128         vfs_context_t context;
 129 {
 130         struct proc *p = vfs_context_proc(context);
 131         int cmd, type, error;
 132
 133 #if !QUOTA
 134         return (ENOTSUP);
 135 #else
 136         if (uid == -1)
 137                 uid = vfs_context_ucred(context)->cr_ruid;
 138         cmd = cmds >> SUBCMDSHIFT;
 139
 140         switch (cmd) {
 141         case Q_SYNC:
 142         case Q_QUOTASTAT:
 143                 break;
 144         case Q_GETQUOTA:
 145                 if (uid == vfs_context_ucred(context)->cr_ruid)
 146                         break;
 147                 /* fall through */
 148         default:
 149                 if (error = vfs_context_suser(context))
 150                         return (error);
 151         }
 152
 153         type = cmds & SUBCMDMASK;
 154         if ((u_int)type >= MAXQUOTAS)
 155                 return (EINVAL);
 156         if (vfs_busy(mp, LK_NOWAIT))
 157                 return (0);
 158
 159         switch (cmd) {
 160
 161         case Q_QUOTAON:
 162                 error = quotaon(context, mp, type, datap);
 163                 break;
 164
 165         case Q_QUOTAOFF:
 166                 error = quotaoff(mp, type);
 167                 break;
 168
 169         case Q_SETQUOTA:
 170                 error = setquota(mp, uid, type, datap);
 171                 break;
 172
 173         case Q_SETUSE:
 174                 error = setuse(mp, uid, type, datap);
 175                 break;
 176
 177         case Q_GETQUOTA:
 178                 error = getquota(mp, uid, type, datap);
 179                 break;
 180
 181         case Q_SYNC:
 182                 error = qsync(mp);
 183                 break;
 184
 185         case Q_QUOTASTAT:
 186                 error = quotastat(mp, type, datap);
 187                 break;
 188
 189         default:
 190                 error = EINVAL;
 191                 break;
 192         }
 193         vfs_unbusy(mp);
 194
 195         return (error);
 196 #endif
 197 }
 198
 199 /*
 200  * Initial UFS filesystems, done only once.
 201  */
 202 int
 203 ufs_init(vfsp)
 204         struct vfsconf *vfsp;
 205 {
 206         static int done;
 207
 208         if (done)
 209                 return (0);
 210         done = 1;
 211         ufs_ihashinit();
 212 #if QUOTA
 213         dqinit();
 214 #endif
 215         return (0);
 216 }
 217