bsd/ufs/ufs/ufs_vfsops.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1991, 1993, 1994
  25  *      The Regents of the University of California.  All rights reserved.
  26  * (c) UNIX System Laboratories, Inc.
  27  * All or some portions of this file are derived from material licensed
  28  * to the University of California by American Telephone and Telegraph
  29  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  30  * the permission of UNIX System Laboratories, Inc.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)ufs_vfsops.c        8.8 (Berkeley) 5/20/95
  61  */
  62
  63 #include <sys/param.h>
  64 #include <sys/mbuf.h>
  65 #include <sys/mount_internal.h>
  66 #include <sys/proc.h>
  67 #include <sys/vnode_internal.h>
  68 #include <sys/malloc.h>
  69 #include <sys/quota.h>
  70
  71 #include <miscfs/specfs/specdev.h>
  72
  73 #include <ufs/ufs/quota.h>
  74 #include <ufs/ufs/inode.h>
  75 #include <ufs/ufs/ufsmount.h>
  76 #include <ufs/ufs/ufs_extern.h>
  77
  78 /*
  79  * Make a filesystem operational.
  80  * Nothing to do at the moment.
  81  */
  82 /* ARGSUSED */
  83 int
  84 ufs_start(mp, flags, context)
  85         struct mount *mp;
  86         int flags;
  87         vfs_context_t context;
  88 {
  89
  90         return (0);
  91 }
  92
  93 /*
  94  * Return the root of a filesystem.
  95  */
  96 int
  97 ufs_root(mp, vpp, context)
  98         struct mount *mp;
  99         struct vnode **vpp;
 100         vfs_context_t context;
 101 {
 102         struct vnode *nvp;
 103         int error;
 104
 105         if (error = VFS_VGET(mp, (ino64_t)ROOTINO, &nvp, context))
 106                 return (error);
 107         *vpp = nvp;
 108         return (0);
 109 }
 110
 111 /*
 112  * Do operations associated with quotas
 113  */
 114 int
 115 ufs_quotactl(mp, cmds, uid, datap, context)
 116         struct mount *mp;
 117         int cmds;
 118         uid_t uid;
 119         caddr_t datap;
 120         vfs_context_t context;
 121 {
 122         struct proc *p = vfs_context_proc(context);
 123         int cmd, type, error;
 124
 125 #if !QUOTA
 126         return (ENOTSUP);
 127 #else
 128         if (uid == -1)
 129                 uid = vfs_context_ucred(context)->cr_ruid;
 130         cmd = cmds >> SUBCMDSHIFT;
 131
 132         switch (cmd) {
 133         case Q_SYNC:
 134         case Q_QUOTASTAT:
 135                 break;
 136         case Q_GETQUOTA:
 137                 if (uid == vfs_context_ucred(context)->cr_ruid)
 138                         break;
 139                 /* fall through */
 140         default:
 141                 if (error = vfs_context_suser(context))
 142                         return (error);
 143         }
 144
 145         type = cmds & SUBCMDMASK;
 146         if ((u_int)type >= MAXQUOTAS)
 147                 return (EINVAL);
 148         if (vfs_busy(mp, LK_NOWAIT))
 149                 return (0);
 150
 151         switch (cmd) {
 152
 153         case Q_QUOTAON:
 154                 error = quotaon(context, mp, type, datap);
 155                 break;
 156
 157         case Q_QUOTAOFF:
 158                 error = quotaoff(mp, type);
 159                 break;
 160
 161         case Q_SETQUOTA:
 162                 error = setquota(mp, uid, type, datap);
 163                 break;
 164
 165         case Q_SETUSE:
 166                 error = setuse(mp, uid, type, datap);
 167                 break;
 168
 169         case Q_GETQUOTA:
 170                 error = getquota(mp, uid, type, datap);
 171                 break;
 172
 173         case Q_SYNC:
 174                 error = qsync(mp);
 175                 break;
 176
 177         case Q_QUOTASTAT:
 178                 error = quotastat(mp, type, datap);
 179                 break;
 180
 181         default:
 182                 error = EINVAL;
 183                 break;
 184         }
 185         vfs_unbusy(mp);
 186
 187         return (error);
 188 #endif
 189 }
 190
 191 /*
 192  * Initial UFS filesystems, done only once.
 193  */
 194 int
 195 ufs_init(vfsp)
 196         struct vfsconf *vfsp;
 197 {
 198         static int done;
 199
 200         if (done)
 201                 return (0);
 202         done = 1;
 203         ufs_ihashinit();
 204 #if QUOTA
 205         dqinit();
 206 #endif
 207         return (0);
 208 }
 209