1 /* $NetBSD: ulfs_vfsops.c,v 1.16 2020/01/17 20:08:10 ad Exp $ */ 2 /* from NetBSD: ufs_vfsops.c,v 1.54 2015/03/17 09:39:29 hannken Exp */ 3 4 /* 5 * Copyright (c) 1991, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: ulfs_vfsops.c,v 1.16 2020/01/17 20:08:10 ad Exp $"); 42 43 #if defined(_KERNEL_OPT) 44 #include "opt_lfs.h" 45 #include "opt_quota.h" 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/mount.h> 50 #include <sys/proc.h> 51 #include <sys/buf.h> 52 #include <sys/vnode.h> 53 #include <sys/kmem.h> 54 #include <sys/kauth.h> 55 #include <sys/quotactl.h> 56 57 #include <miscfs/specfs/specdev.h> 58 59 #include <ufs/lfs/lfs.h> 60 #include <ufs/lfs/lfs_accessors.h> 61 #include <ufs/lfs/ulfs_quotacommon.h> 62 #include <ufs/lfs/ulfs_inode.h> 63 #include <ufs/lfs/ulfsmount.h> 64 #include <ufs/lfs/ulfs_extern.h> 65 #ifdef LFS_DIRHASH 66 #include <ufs/lfs/ulfs_dirhash.h> 67 #endif 68 69 /* how many times ulfs_init() was called */ 70 static int ulfs_initcount = 0; 71 72 /* 73 * Make a filesystem operational. 74 * Nothing to do at the moment. 75 */ 76 /* ARGSUSED */ 77 int 78 ulfs_start(struct mount *mp, int flags) 79 { 80 81 return (0); 82 } 83 84 /* 85 * Return the root of a filesystem. 86 */ 87 int 88 ulfs_root(struct mount *mp, int lktype, struct vnode **vpp) 89 { 90 struct vnode *nvp; 91 int error; 92 93 if ((error = VFS_VGET(mp, (ino_t)ULFS_ROOTINO, lktype, &nvp)) != 0) 94 return (error); 95 *vpp = nvp; 96 return (0); 97 } 98 99 /* 100 * Do operations associated with quotas 101 */ 102 int 103 ulfs_quotactl(struct mount *mp, struct quotactl_args *args) 104 { 105 106 #if !defined(LFS_QUOTA) && !defined(LFS_QUOTA2) 107 (void) mp; 108 (void) args; 109 return (EOPNOTSUPP); 110 #else 111 struct lwp *l = curlwp; 112 int error; 113 114 /* Mark the mount busy, as we're passing it to kauth(9). */ 115 error = vfs_busy(mp); 116 if (error) { 117 return (error); 118 } 119 mutex_enter(mp->mnt_updating); 120 121 error = lfsquota_handle_cmd(mp, l, args); 122 123 mutex_exit(mp->mnt_updating); 124 vfs_unbusy(mp); 125 return (error); 126 #endif 127 } 128 129 #if 0 130 switch (cmd) { 131 case Q_SYNC: 132 break; 133 134 case Q_GETQUOTA: 135 /* The user can always query about his own quota. */ 136 if (uid == kauth_cred_getuid(l->l_cred)) 137 break; 138 139 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 140 KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, KAUTH_ARG(uid), NULL); 141 142 break; 143 144 case Q_QUOTAON: 145 case Q_QUOTAOFF: 146 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 147 KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF, mp, NULL, NULL); 148 149 break; 150 151 case Q_SETQUOTA: 152 case Q_SETUSE: 153 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 154 KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE, mp, KAUTH_ARG(uid), NULL); 155 156 break; 157 158 default: 159 error = EINVAL; 160 break; 161 } 162 163 type = cmds & SUBCMDMASK; 164 if (!error) { 165 /* Only check if there was no error above. */ 166 if ((u_int)type >= MAXQUOTAS) 167 error = EINVAL; 168 } 169 170 if (error) { 171 vfs_unbusy(mp); 172 return (error); 173 } 174 175 mutex_enter(mp->mnt_updating); 176 switch (cmd) { 177 178 case Q_QUOTAON: 179 error = quotaon(l, mp, type, arg); 180 break; 181 182 case Q_QUOTAOFF: 183 error = quotaoff(l, mp, type); 184 break; 185 186 case Q_SETQUOTA: 187 error = setquota(mp, uid, type, arg); 188 break; 189 190 case Q_SETUSE: 191 error = setuse(mp, uid, type, arg); 192 break; 193 194 case Q_GETQUOTA: 195 error = getquota(mp, uid, type, arg); 196 break; 197 198 case Q_SYNC: 199 error = lfs_qsync(mp); 200 break; 201 202 default: 203 error = EINVAL; 204 } 205 mutex_exit(mp->mnt_updating); 206 vfs_unbusy(mp); 207 return (error); 208 #endif 209 210 /* 211 * This is the generic part of fhtovp called after the underlying 212 * filesystem has validated the file handle. 213 */ 214 int 215 ulfs_fhtovp(struct mount *mp, struct ulfs_ufid *ufhp, int lktype, 216 struct vnode **vpp) 217 { 218 struct vnode *nvp; 219 struct inode *ip; 220 int error; 221 222 if ((error = VFS_VGET(mp, ufhp->ufid_ino, lktype, &nvp)) != 0) { 223 if (error == ENOENT) 224 error = ESTALE; 225 *vpp = NULLVP; 226 return (error); 227 } 228 ip = VTOI(nvp); 229 KASSERT(ip != NULL); 230 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen) { 231 vput(nvp); 232 *vpp = NULLVP; 233 return (ESTALE); 234 } 235 *vpp = nvp; 236 return (0); 237 } 238 239 /* 240 * Initialize ULFS filesystems, done only once. 241 */ 242 void 243 ulfs_init(void) 244 { 245 if (ulfs_initcount++ > 0) 246 return; 247 248 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 249 lfs_dqinit(); 250 #endif 251 #ifdef LFS_DIRHASH 252 ulfsdirhash_init(); 253 #endif 254 #ifdef LFS_EXTATTR 255 ulfs_extattr_init(); 256 #endif 257 } 258 259 void 260 ulfs_reinit(void) 261 { 262 263 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 264 lfs_dqreinit(); 265 #endif 266 } 267 268 /* 269 * Free ULFS filesystem resources, done only once. 270 */ 271 void 272 ulfs_done(void) 273 { 274 if (--ulfs_initcount > 0) 275 return; 276 277 #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 278 lfs_dqdone(); 279 #endif 280 #ifdef LFS_DIRHASH 281 ulfsdirhash_done(); 282 #endif 283 #ifdef LFS_EXTATTR 284 ulfs_extattr_done(); 285 #endif 286 } 287
Indexes created Sat Sep 20 22:09:52 GMT 2025