1 /* 2 * Copyright (c) 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95 39 * $FreeBSD: src/sys/ufs/ufs/ufs_vfsops.c,v 1.17.2.3 2001/10/14 19:08:16 iedowse Exp $ 40 */ 41 42 #include "opt_quota.h" 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/mount.h> 47 #include <sys/proc.h> 48 #include <sys/malloc.h> 49 #include <sys/vnode.h> 50 51 #include <ufs/ufs/quota.h> 52 #include <ufs/ufs/inode.h> 53 #include <ufs/ufs/ufsmount.h> 54 #include <ufs/ufs/ufs_extern.h> 55 56 MALLOC_DEFINE(M_UFSMNT, "UFS mount", "UFS mount structure"); 57 /* 58 * Make a filesystem operational. 59 * Nothing to do at the moment. 60 */ 61 /* ARGSUSED */ 62 int 63 ufs_start(mp, flags, p) 64 struct mount *mp; 65 int flags; 66 struct proc *p; 67 { 68 69 return (0); 70 } 71 72 /* 73 * Return the root of a filesystem. 74 */ 75 int 76 ufs_root(mp, vpp) 77 struct mount *mp; 78 struct vnode **vpp; 79 { 80 struct vnode *nvp; 81 int error; 82 83 error = VFS_VGET(mp, (ino_t)ROOTINO, &nvp); 84 if (error) 85 return (error); 86 *vpp = nvp; 87 return (0); 88 } 89 90 /* 91 * Do operations associated with quotas 92 */ 93 int 94 ufs_quotactl(mp, cmds, uid, arg, p) 95 struct mount *mp; 96 int cmds; 97 uid_t uid; 98 caddr_t arg; 99 struct proc *p; 100 { 101 #ifndef QUOTA 102 return (EOPNOTSUPP); 103 #else 104 int cmd, type, error; 105 106 if (uid == -1) 107 uid = p->p_cred->p_ruid; 108 cmd = cmds >> SUBCMDSHIFT; 109 110 switch (cmd) { 111 case Q_SYNC: 112 break; 113 case Q_GETQUOTA: 114 if (uid == p->p_cred->p_ruid) 115 break; 116 /* fall through */ 117 default: 118 if ((error = suser_xxx(0, p, PRISON_ROOT)) != 0) 119 return (error); 120 } 121 122 type = cmds & SUBCMDMASK; 123 if ((u_int)type >= MAXQUOTAS) 124 return (EINVAL); 125 if (vfs_busy(mp, LK_NOWAIT, 0, p)) 126 return (0); 127 128 switch (cmd) { 129 130 case Q_QUOTAON: 131 error = quotaon(p, mp, type, arg); 132 break; 133 134 case Q_QUOTAOFF: 135 error = quotaoff(p, mp, type); 136 break; 137 138 case Q_SETQUOTA: 139 error = setquota(mp, uid, type, arg); 140 break; 141 142 case Q_SETUSE: 143 error = setuse(mp, uid, type, arg); 144 break; 145 146 case Q_GETQUOTA: 147 error = getquota(mp, uid, type, arg); 148 break; 149 150 case Q_SYNC: 151 error = qsync(mp); 152 break; 153 154 default: 155 error = EINVAL; 156 break; 157 } 158 vfs_unbusy(mp, p); 159 return (error); 160 #endif 161 } 162 163 /* 164 * Initial UFS filesystems, done only once. 165 */ 166 int 167 ufs_init(vfsp) 168 struct vfsconf *vfsp; 169 { 170 static int done; 171 172 if (done) 173 return (0); 174 done = 1; 175 ufs_ihashinit(); 176 #ifdef QUOTA 177 dqinit(); 178 #endif 179 return (0); 180 } 181 182 /* 183 * This is the generic part of fhtovp called after the underlying 184 * filesystem has validated the file handle. 185 * 186 * Call the VFS_CHECKEXP beforehand to verify access. 187 */ 188 int 189 ufs_fhtovp(mp, ufhp, vpp) 190 register struct mount *mp; 191 struct ufid *ufhp; 192 struct vnode **vpp; 193 { 194 register struct inode *ip; 195 struct vnode *nvp; 196 int error; 197 198 error = VFS_VGET(mp, ufhp->ufid_ino, &nvp); 199 if (error) { 200 *vpp = NULLVP; 201 return (error); 202 } 203 ip = VTOI(nvp); 204 if (ip->i_mode == 0 || 205 ip->i_gen != ufhp->ufid_gen || 206 (VFSTOUFS(mp)->um_i_effnlink_valid ? ip->i_effnlink : 207 ip->i_nlink) <= 0) { 208 vput(nvp); 209 *vpp = NULLVP; 210 return (ESTALE); 211 } 212 *vpp = nvp; 213 return (0); 214 } 215 216 217 /* 218 * This is the generic part of fhtovp called after the underlying 219 * filesystem has validated the file handle. 220 * 221 * Verify that a host should have access to a filesystem. 222 */ 223 int 224 ufs_check_export(mp, nam, exflagsp, credanonp) 225 register struct mount *mp; 226 struct sockaddr *nam; 227 int *exflagsp; 228 struct ucred **credanonp; 229 { 230 register struct netcred *np; 231 register struct ufsmount *ump;; 232 233 ump = VFSTOUFS(mp); 234 /* 235 * Get the export permission structure for this <mp, client> tuple. 236 */ 237 np = vfs_export_lookup(mp, &ump->um_export, nam); 238 if (np == NULL) 239 return (EACCES); 240 241 *exflagsp = np->netc_exflags; 242 *credanonp = &np->netc_anon; 243 return (0); 244 } 245