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(struct mount *mp, int flags, struct vnode **vpp) 72 { 73 struct vnode *nvp; 74 int error; 75 76 error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, flags, &nvp); 77 if (error) 78 return (error); 79 *vpp = nvp; 80 return (0); 81 } 82 83 /* 84 * Do operations associated with quotas 85 */ 86 int 87 ufs_quotactl(struct mount *mp, int cmds, uid_t id, void *arg, bool *mp_busy) 88 { 89 #ifndef QUOTA 90 return (EOPNOTSUPP); 91 #else 92 struct thread *td; 93 int cmd, type, error; 94 95 td = curthread; 96 cmd = cmds >> SUBCMDSHIFT; 97 type = cmds & SUBCMDMASK; 98 if (id == -1) { 99 switch (type) { 100 case USRQUOTA: 101 id = td->td_ucred->cr_ruid; 102 break; 103 104 case GRPQUOTA: 105 id = td->td_ucred->cr_rgid; 106 break; 107 108 default: 109 return (EINVAL); 110 } 111 } 112 if ((u_int)type >= MAXQUOTAS) 113 return (EINVAL); 114 115 switch (cmd) { 116 case Q_QUOTAON: 117 error = quotaon(td, mp, type, arg, mp_busy); 118 break; 119 120 case Q_QUOTAOFF: 121 vfs_ref(mp); 122 KASSERT(*mp_busy, 123 ("%s called without busied mount", __func__)); 124 vn_start_write(NULL, &mp, V_WAIT); 125 vfs_unbusy(mp); 126 *mp_busy = false; 127 error = quotaoff(td, mp, type); 128 vn_finished_write(mp); 129 vfs_rel(mp); 130 break; 131 132 case Q_SETQUOTA32: 133 error = setquota32(td, mp, id, type, arg); 134 break; 135 136 case Q_SETUSE32: 137 error = setuse32(td, mp, id, type, arg); 138 break; 139 140 case Q_GETQUOTA32: 141 error = getquota32(td, mp, id, type, arg); 142 break; 143 144 case Q_SETQUOTA: 145 error = setquota(td, mp, id, type, arg); 146 break; 147 148 case Q_SETUSE: 149 error = setuse(td, mp, id, type, arg); 150 break; 151 152 case Q_GETQUOTA: 153 error = getquota(td, mp, id, type, arg); 154 break; 155 156 case Q_GETQUOTASIZE: 157 error = getquotasize(td, mp, id, type, arg); 158 break; 159 160 case Q_SYNC: 161 error = qsync(mp); 162 break; 163 164 default: 165 error = EINVAL; 166 break; 167 } 168 return (error); 169 #endif 170 } 171 172 /* 173 * Initial UFS filesystems, done only once. 174 */ 175 int 176 ufs_init(struct vfsconf *vfsp) 177 { 178 179 #ifdef QUOTA 180 dqinit(); 181 #endif 182 #ifdef UFS_DIRHASH 183 ufsdirhash_init(); 184 #endif 185 return (0); 186 } 187 188 /* 189 * Uninitialise UFS filesystems, done before module unload. 190 */ 191 int 192 ufs_uninit(struct vfsconf *vfsp) 193 { 194 195 #ifdef QUOTA 196 dquninit(); 197 #endif 198 #ifdef UFS_DIRHASH 199 ufsdirhash_uninit(); 200 #endif 201 return (0); 202 } 203