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 #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(struct mount *mp, int flags, struct vnode **vpp) 70 { 71 struct vnode *nvp; 72 int error; 73 74 error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, flags, &nvp); 75 if (error) 76 return (error); 77 *vpp = nvp; 78 return (0); 79 } 80 81 /* 82 * Do operations associated with quotas 83 */ 84 int 85 ufs_quotactl(struct mount *mp, int cmds, uid_t id, void *arg, bool *mp_busy) 86 { 87 #ifndef QUOTA 88 return (EOPNOTSUPP); 89 #else 90 struct thread *td; 91 int cmd, type, error; 92 93 td = curthread; 94 cmd = cmds >> SUBCMDSHIFT; 95 type = cmds & SUBCMDMASK; 96 if (id == -1) { 97 switch (type) { 98 case USRQUOTA: 99 id = td->td_ucred->cr_ruid; 100 break; 101 102 case GRPQUOTA: 103 id = td->td_ucred->cr_rgid; 104 break; 105 106 default: 107 return (EINVAL); 108 } 109 } 110 if ((uint64_t)type >= MAXQUOTAS) 111 return (EINVAL); 112 113 switch (cmd) { 114 case Q_QUOTAON: 115 error = quotaon(td, mp, type, arg, mp_busy); 116 break; 117 118 case Q_QUOTAOFF: 119 vfs_ref(mp); 120 KASSERT(*mp_busy, 121 ("%s called without busied mount", __func__)); 122 vn_start_write(NULL, &mp, V_WAIT); 123 vfs_unbusy(mp); 124 *mp_busy = false; 125 error = quotaoff(td, mp, type); 126 vn_finished_write(mp); 127 vfs_rel(mp); 128 break; 129 130 case Q_SETQUOTA32: 131 error = setquota32(td, mp, id, type, arg); 132 break; 133 134 case Q_SETUSE32: 135 error = setuse32(td, mp, id, type, arg); 136 break; 137 138 case Q_GETQUOTA32: 139 error = getquota32(td, mp, id, type, arg); 140 break; 141 142 case Q_SETQUOTA: 143 error = setquota(td, mp, id, type, arg); 144 break; 145 146 case Q_SETUSE: 147 error = setuse(td, mp, id, type, arg); 148 break; 149 150 case Q_GETQUOTA: 151 error = getquota(td, mp, id, type, arg); 152 break; 153 154 case Q_GETQUOTASIZE: 155 error = getquotasize(td, mp, id, type, arg); 156 break; 157 158 case Q_SYNC: 159 error = qsync(mp); 160 break; 161 162 default: 163 error = EINVAL; 164 break; 165 } 166 return (error); 167 #endif 168 } 169 170 /* 171 * Initial UFS filesystems, done only once. 172 */ 173 int 174 ufs_init(struct vfsconf *vfsp) 175 { 176 177 #ifdef QUOTA 178 dqinit(); 179 #endif 180 #ifdef UFS_DIRHASH 181 ufsdirhash_init(); 182 #endif 183 return (0); 184 } 185 186 /* 187 * Uninitialise UFS filesystems, done before module unload. 188 */ 189 int 190 ufs_uninit(struct vfsconf *vfsp) 191 { 192 193 #ifdef QUOTA 194 dquninit(); 195 #endif 196 #ifdef UFS_DIRHASH 197 ufsdirhash_uninit(); 198 #endif 199 return (0); 200 } 201