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 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include "opt_quota.h" 41 #include "opt_ufs.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/lock.h> 47 #include <sys/malloc.h> 48 #include <sys/mount.h> 49 #include <sys/proc.h> 50 #include <sys/socket.h> 51 #include <sys/vnode.h> 52 53 #include <ufs/ufs/extattr.h> 54 #include <ufs/ufs/quota.h> 55 #include <ufs/ufs/inode.h> 56 #include <ufs/ufs/ufsmount.h> 57 #include <ufs/ufs/ufs_extern.h> 58 #ifdef UFS_DIRHASH 59 #include <ufs/ufs/dir.h> 60 #include <ufs/ufs/dirhash.h> 61 #endif 62 63 MALLOC_DEFINE(M_UFSMNT, "ufs_mount", "UFS mount structure"); 64 65 /* 66 * Return the root of a filesystem. 67 */ 68 int 69 ufs_root(mp, flags, vpp) 70 struct mount *mp; 71 int flags; 72 struct vnode **vpp; 73 { 74 struct vnode *nvp; 75 int error; 76 77 error = VFS_VGET(mp, (ino_t)ROOTINO, flags, &nvp); 78 if (error) 79 return (error); 80 *vpp = nvp; 81 return (0); 82 } 83 84 /* 85 * Do operations associated with quotas 86 */ 87 int 88 ufs_quotactl(mp, cmds, id, arg) 89 struct mount *mp; 90 int cmds; 91 uid_t id; 92 void *arg; 93 { 94 #ifndef QUOTA 95 if ((cmds >> SUBCMDSHIFT) == Q_QUOTAON) 96 vfs_unbusy(mp); 97 98 return (EOPNOTSUPP); 99 #else 100 struct thread *td; 101 int cmd, type, error; 102 103 td = curthread; 104 cmd = cmds >> SUBCMDSHIFT; 105 type = cmds & SUBCMDMASK; 106 if (id == -1) { 107 switch (type) { 108 109 case USRQUOTA: 110 id = td->td_ucred->cr_ruid; 111 break; 112 113 case GRPQUOTA: 114 id = td->td_ucred->cr_rgid; 115 break; 116 117 default: 118 if (cmd == Q_QUOTAON) 119 vfs_unbusy(mp); 120 return (EINVAL); 121 } 122 } 123 if ((u_int)type >= MAXQUOTAS) { 124 if (cmd == Q_QUOTAON) 125 vfs_unbusy(mp); 126 return (EINVAL); 127 } 128 129 switch (cmd) { 130 case Q_QUOTAON: 131 error = quotaon(td, mp, type, arg); 132 break; 133 134 case Q_QUOTAOFF: 135 error = quotaoff(td, mp, type); 136 break; 137 138 case Q_SETQUOTA32: 139 error = setquota32(td, mp, id, type, arg); 140 break; 141 142 case Q_SETUSE32: 143 error = setuse32(td, mp, id, type, arg); 144 break; 145 146 case Q_GETQUOTA32: 147 error = getquota32(td, mp, id, type, arg); 148 break; 149 150 case Q_SETQUOTA: 151 error = setquota(td, mp, id, type, arg); 152 break; 153 154 case Q_SETUSE: 155 error = setuse(td, mp, id, type, arg); 156 break; 157 158 case Q_GETQUOTA: 159 error = getquota(td, mp, id, type, arg); 160 break; 161 162 case Q_GETQUOTASIZE: 163 error = getquotasize(td, mp, id, type, arg); 164 break; 165 166 case Q_SYNC: 167 error = qsync(mp); 168 break; 169 170 default: 171 error = EINVAL; 172 break; 173 } 174 return (error); 175 #endif 176 } 177 178 /* 179 * Initial UFS filesystems, done only once. 180 */ 181 int 182 ufs_init(vfsp) 183 struct vfsconf *vfsp; 184 { 185 186 #ifdef QUOTA 187 dqinit(); 188 #endif 189 #ifdef UFS_DIRHASH 190 ufsdirhash_init(); 191 #endif 192 return (0); 193 } 194 195 /* 196 * Uninitialise UFS filesystems, done before module unload. 197 */ 198 int 199 ufs_uninit(vfsp) 200 struct vfsconf *vfsp; 201 { 202 203 #ifdef QUOTA 204 dquninit(); 205 #endif 206 #ifdef UFS_DIRHASH 207 ufsdirhash_uninit(); 208 #endif 209 return (0); 210 } 211 212 /* 213 * This is the generic part of fhtovp called after the underlying 214 * filesystem has validated the file handle. 215 * 216 * Call the VFS_CHECKEXP beforehand to verify access. 217 */ 218 int 219 ufs_fhtovp(mp, ufhp, flags, vpp) 220 struct mount *mp; 221 struct ufid *ufhp; 222 int flags; 223 struct vnode **vpp; 224 { 225 struct inode *ip; 226 struct vnode *nvp; 227 int error; 228 229 error = VFS_VGET(mp, ufhp->ufid_ino, flags, &nvp); 230 if (error) { 231 *vpp = NULLVP; 232 return (error); 233 } 234 ip = VTOI(nvp); 235 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen || 236 ip->i_effnlink <= 0) { 237 vput(nvp); 238 *vpp = NULLVP; 239 return (ESTALE); 240 } 241 *vpp = nvp; 242 vnode_create_vobject(*vpp, DIP(ip, i_size), curthread); 243 return (0); 244 } 245