1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include "opt_quota.h" 43 #include "opt_ufs.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/lock.h> 49 #include <sys/malloc.h> 50 #include <sys/mount.h> 51 #include <sys/proc.h> 52 #include <sys/socket.h> 53 #include <sys/vnode.h> 54 55 #include <ufs/ufs/extattr.h> 56 #include <ufs/ufs/quota.h> 57 #include <ufs/ufs/inode.h> 58 #include <ufs/ufs/ufsmount.h> 59 #include <ufs/ufs/ufs_extern.h> 60 #ifdef UFS_DIRHASH 61 #include <ufs/ufs/dir.h> 62 #include <ufs/ufs/dirhash.h> 63 #endif 64 65 MALLOC_DEFINE(M_UFSMNT, "ufs_mount", "UFS mount structure"); 66 67 /* 68 * Return the root of a filesystem. 69 */ 70 int 71 ufs_root(mp, flags, vpp) 72 struct mount *mp; 73 int flags; 74 struct vnode **vpp; 75 { 76 struct vnode *nvp; 77 int error; 78 79 error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, flags, &nvp); 80 if (error) 81 return (error); 82 *vpp = nvp; 83 return (0); 84 } 85 86 /* 87 * Do operations associated with quotas 88 */ 89 int 90 ufs_quotactl(mp, cmds, id, arg) 91 struct mount *mp; 92 int cmds; 93 uid_t id; 94 void *arg; 95 { 96 #ifndef QUOTA 97 if ((cmds >> SUBCMDSHIFT) == Q_QUOTAON || 98 (cmds >> SUBCMDSHIFT) == Q_QUOTAOFF) 99 vfs_unbusy(mp); 100 101 return (EOPNOTSUPP); 102 #else 103 struct thread *td; 104 int cmd, type, error; 105 106 td = curthread; 107 cmd = cmds >> SUBCMDSHIFT; 108 type = cmds & SUBCMDMASK; 109 if (id == -1) { 110 switch (type) { 111 112 case USRQUOTA: 113 id = td->td_ucred->cr_ruid; 114 break; 115 116 case GRPQUOTA: 117 id = td->td_ucred->cr_rgid; 118 break; 119 120 default: 121 if (cmd == Q_QUOTAON || cmd == Q_QUOTAOFF) 122 vfs_unbusy(mp); 123 return (EINVAL); 124 } 125 } 126 if ((u_int)type >= MAXQUOTAS) { 127 if (cmd == Q_QUOTAON || cmd == Q_QUOTAOFF) 128 vfs_unbusy(mp); 129 return (EINVAL); 130 } 131 132 switch (cmd) { 133 case Q_QUOTAON: 134 error = quotaon(td, mp, type, arg); 135 break; 136 137 case Q_QUOTAOFF: 138 vfs_ref(mp); 139 vfs_unbusy(mp); 140 vn_start_write(NULL, &mp, V_WAIT | V_MNTREF); 141 error = quotaoff(td, mp, type); 142 vn_finished_write(mp); 143 break; 144 145 case Q_SETQUOTA32: 146 error = setquota32(td, mp, id, type, arg); 147 break; 148 149 case Q_SETUSE32: 150 error = setuse32(td, mp, id, type, arg); 151 break; 152 153 case Q_GETQUOTA32: 154 error = getquota32(td, mp, id, type, arg); 155 break; 156 157 case Q_SETQUOTA: 158 error = setquota(td, mp, id, type, arg); 159 break; 160 161 case Q_SETUSE: 162 error = setuse(td, mp, id, type, arg); 163 break; 164 165 case Q_GETQUOTA: 166 error = getquota(td, mp, id, type, arg); 167 break; 168 169 case Q_GETQUOTASIZE: 170 error = getquotasize(td, mp, id, type, arg); 171 break; 172 173 case Q_SYNC: 174 error = qsync(mp); 175 break; 176 177 default: 178 error = EINVAL; 179 break; 180 } 181 return (error); 182 #endif 183 } 184 185 /* 186 * Initial UFS filesystems, done only once. 187 */ 188 int 189 ufs_init(vfsp) 190 struct vfsconf *vfsp; 191 { 192 193 #ifdef QUOTA 194 dqinit(); 195 #endif 196 #ifdef UFS_DIRHASH 197 ufsdirhash_init(); 198 #endif 199 return (0); 200 } 201 202 /* 203 * Uninitialise UFS filesystems, done before module unload. 204 */ 205 int 206 ufs_uninit(vfsp) 207 struct vfsconf *vfsp; 208 { 209 210 #ifdef QUOTA 211 dquninit(); 212 #endif 213 #ifdef UFS_DIRHASH 214 ufsdirhash_uninit(); 215 #endif 216 return (0); 217 } 218 219 /* 220 * This is the generic part of fhtovp called after the underlying 221 * filesystem has validated the file handle. 222 * 223 * Call the VFS_CHECKEXP beforehand to verify access. 224 */ 225 int 226 ufs_fhtovp(mp, ufhp, flags, vpp) 227 struct mount *mp; 228 struct ufid *ufhp; 229 int flags; 230 struct vnode **vpp; 231 { 232 struct inode *ip; 233 struct vnode *nvp; 234 int error; 235 236 error = VFS_VGET(mp, ufhp->ufid_ino, flags, &nvp); 237 if (error) { 238 *vpp = NULLVP; 239 return (error); 240 } 241 ip = VTOI(nvp); 242 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen || 243 ip->i_effnlink <= 0) { 244 vput(nvp); 245 *vpp = NULLVP; 246 return (ESTALE); 247 } 248 *vpp = nvp; 249 vnode_create_vobject(*vpp, DIP(ip, i_size), curthread); 250 return (0); 251 } 252