ulfs_vfsops.c revision 1.8.2.3
1 1.8.2.2 tls /* $NetBSD: ulfs_vfsops.c,v 1.8.2.3 2017/12/03 11:39:22 jdolecek Exp $ */ 2 1.8.2.3 jdolecek /* from NetBSD: ufs_vfsops.c,v 1.54 2015/03/17 09:39:29 hannken Exp */ 3 1.8.2.2 tls 4 1.8.2.2 tls /* 5 1.8.2.2 tls * Copyright (c) 1991, 1993, 1994 6 1.8.2.2 tls * The Regents of the University of California. All rights reserved. 7 1.8.2.2 tls * (c) UNIX System Laboratories, Inc. 8 1.8.2.2 tls * All or some portions of this file are derived from material licensed 9 1.8.2.2 tls * to the University of California by American Telephone and Telegraph 10 1.8.2.2 tls * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 1.8.2.2 tls * the permission of UNIX System Laboratories, Inc. 12 1.8.2.2 tls * 13 1.8.2.2 tls * Redistribution and use in source and binary forms, with or without 14 1.8.2.2 tls * modification, are permitted provided that the following conditions 15 1.8.2.2 tls * are met: 16 1.8.2.2 tls * 1. Redistributions of source code must retain the above copyright 17 1.8.2.2 tls * notice, this list of conditions and the following disclaimer. 18 1.8.2.2 tls * 2. Redistributions in binary form must reproduce the above copyright 19 1.8.2.2 tls * notice, this list of conditions and the following disclaimer in the 20 1.8.2.2 tls * documentation and/or other materials provided with the distribution. 21 1.8.2.2 tls * 3. Neither the name of the University nor the names of its contributors 22 1.8.2.2 tls * may be used to endorse or promote products derived from this software 23 1.8.2.2 tls * without specific prior written permission. 24 1.8.2.2 tls * 25 1.8.2.2 tls * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 1.8.2.2 tls * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 1.8.2.2 tls * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 1.8.2.2 tls * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 1.8.2.2 tls * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 1.8.2.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 1.8.2.2 tls * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 1.8.2.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 1.8.2.2 tls * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 1.8.2.2 tls * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 1.8.2.2 tls * SUCH DAMAGE. 36 1.8.2.2 tls * 37 1.8.2.2 tls * @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95 38 1.8.2.2 tls */ 39 1.8.2.2 tls 40 1.8.2.2 tls #include <sys/cdefs.h> 41 1.8.2.2 tls __KERNEL_RCSID(0, "$NetBSD: ulfs_vfsops.c,v 1.8.2.3 2017/12/03 11:39:22 jdolecek Exp $"); 42 1.8.2.2 tls 43 1.8.2.2 tls #if defined(_KERNEL_OPT) 44 1.8.2.2 tls #include "opt_lfs.h" 45 1.8.2.2 tls #include "opt_quota.h" 46 1.8.2.2 tls #endif 47 1.8.2.2 tls 48 1.8.2.2 tls #include <sys/param.h> 49 1.8.2.2 tls #include <sys/mbuf.h> 50 1.8.2.2 tls #include <sys/mount.h> 51 1.8.2.2 tls #include <sys/proc.h> 52 1.8.2.2 tls #include <sys/buf.h> 53 1.8.2.2 tls #include <sys/vnode.h> 54 1.8.2.2 tls #include <sys/kmem.h> 55 1.8.2.2 tls #include <sys/kauth.h> 56 1.8.2.2 tls #include <sys/quotactl.h> 57 1.8.2.2 tls 58 1.8.2.2 tls #include <miscfs/specfs/specdev.h> 59 1.8.2.2 tls 60 1.8.2.2 tls #include <ufs/lfs/lfs.h> 61 1.8.2.3 jdolecek #include <ufs/lfs/lfs_accessors.h> 62 1.8.2.2 tls #include <ufs/lfs/ulfs_quotacommon.h> 63 1.8.2.2 tls #include <ufs/lfs/ulfs_inode.h> 64 1.8.2.2 tls #include <ufs/lfs/ulfsmount.h> 65 1.8.2.2 tls #include <ufs/lfs/ulfs_extern.h> 66 1.8.2.2 tls #ifdef LFS_DIRHASH 67 1.8.2.2 tls #include <ufs/lfs/ulfs_dirhash.h> 68 1.8.2.2 tls #endif 69 1.8.2.2 tls 70 1.8.2.2 tls /* how many times ulfs_init() was called */ 71 1.8.2.2 tls static int ulfs_initcount = 0; 72 1.8.2.2 tls 73 1.8.2.2 tls /* 74 1.8.2.2 tls * Make a filesystem operational. 75 1.8.2.2 tls * Nothing to do at the moment. 76 1.8.2.2 tls */ 77 1.8.2.2 tls /* ARGSUSED */ 78 1.8.2.2 tls int 79 1.8.2.2 tls ulfs_start(struct mount *mp, int flags) 80 1.8.2.2 tls { 81 1.8.2.2 tls 82 1.8.2.2 tls return (0); 83 1.8.2.2 tls } 84 1.8.2.2 tls 85 1.8.2.2 tls /* 86 1.8.2.2 tls * Return the root of a filesystem. 87 1.8.2.2 tls */ 88 1.8.2.2 tls int 89 1.8.2.2 tls ulfs_root(struct mount *mp, struct vnode **vpp) 90 1.8.2.2 tls { 91 1.8.2.2 tls struct vnode *nvp; 92 1.8.2.2 tls int error; 93 1.8.2.2 tls 94 1.8.2.2 tls if ((error = VFS_VGET(mp, (ino_t)ULFS_ROOTINO, &nvp)) != 0) 95 1.8.2.2 tls return (error); 96 1.8.2.2 tls *vpp = nvp; 97 1.8.2.2 tls return (0); 98 1.8.2.2 tls } 99 1.8.2.2 tls 100 1.8.2.2 tls /* 101 1.8.2.2 tls * Do operations associated with quotas 102 1.8.2.2 tls */ 103 1.8.2.2 tls int 104 1.8.2.2 tls ulfs_quotactl(struct mount *mp, struct quotactl_args *args) 105 1.8.2.2 tls { 106 1.8.2.2 tls 107 1.8.2.2 tls #if !defined(LFS_QUOTA) && !defined(LFS_QUOTA2) 108 1.8.2.2 tls (void) mp; 109 1.8.2.2 tls (void) args; 110 1.8.2.2 tls return (EOPNOTSUPP); 111 1.8.2.2 tls #else 112 1.8.2.2 tls struct lwp *l = curlwp; 113 1.8.2.2 tls int error; 114 1.8.2.2 tls 115 1.8.2.2 tls /* Mark the mount busy, as we're passing it to kauth(9). */ 116 1.8.2.3 jdolecek error = vfs_busy(mp); 117 1.8.2.2 tls if (error) { 118 1.8.2.2 tls return (error); 119 1.8.2.2 tls } 120 1.8.2.2 tls mutex_enter(&mp->mnt_updating); 121 1.8.2.2 tls 122 1.8.2.2 tls error = lfsquota_handle_cmd(mp, l, args); 123 1.8.2.2 tls 124 1.8.2.2 tls mutex_exit(&mp->mnt_updating); 125 1.8.2.3 jdolecek vfs_unbusy(mp); 126 1.8.2.2 tls return (error); 127 1.8.2.2 tls #endif 128 1.8.2.2 tls } 129 1.8.2.2 tls 130 1.8.2.2 tls #if 0 131 1.8.2.2 tls switch (cmd) { 132 1.8.2.2 tls case Q_SYNC: 133 1.8.2.2 tls break; 134 1.8.2.2 tls 135 1.8.2.2 tls case Q_GETQUOTA: 136 1.8.2.2 tls /* The user can always query about his own quota. */ 137 1.8.2.2 tls if (uid == kauth_cred_getuid(l->l_cred)) 138 1.8.2.2 tls break; 139 1.8.2.2 tls 140 1.8.2.2 tls error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 141 1.8.2.2 tls KAUTH_REQ_SYSTEM_FS_QUOTA_GET, mp, KAUTH_ARG(uid), NULL); 142 1.8.2.2 tls 143 1.8.2.2 tls break; 144 1.8.2.2 tls 145 1.8.2.2 tls case Q_QUOTAON: 146 1.8.2.2 tls case Q_QUOTAOFF: 147 1.8.2.2 tls error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 148 1.8.2.2 tls KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF, mp, NULL, NULL); 149 1.8.2.2 tls 150 1.8.2.2 tls break; 151 1.8.2.2 tls 152 1.8.2.2 tls case Q_SETQUOTA: 153 1.8.2.2 tls case Q_SETUSE: 154 1.8.2.2 tls error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FS_QUOTA, 155 1.8.2.2 tls KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE, mp, KAUTH_ARG(uid), NULL); 156 1.8.2.2 tls 157 1.8.2.2 tls break; 158 1.8.2.2 tls 159 1.8.2.2 tls default: 160 1.8.2.2 tls error = EINVAL; 161 1.8.2.2 tls break; 162 1.8.2.2 tls } 163 1.8.2.2 tls 164 1.8.2.2 tls type = cmds & SUBCMDMASK; 165 1.8.2.2 tls if (!error) { 166 1.8.2.2 tls /* Only check if there was no error above. */ 167 1.8.2.2 tls if ((u_int)type >= MAXQUOTAS) 168 1.8.2.2 tls error = EINVAL; 169 1.8.2.2 tls } 170 1.8.2.2 tls 171 1.8.2.2 tls if (error) { 172 1.8.2.3 jdolecek vfs_unbusy(mp); 173 1.8.2.2 tls return (error); 174 1.8.2.2 tls } 175 1.8.2.2 tls 176 1.8.2.2 tls mutex_enter(&mp->mnt_updating); 177 1.8.2.2 tls switch (cmd) { 178 1.8.2.2 tls 179 1.8.2.2 tls case Q_QUOTAON: 180 1.8.2.2 tls error = quotaon(l, mp, type, arg); 181 1.8.2.2 tls break; 182 1.8.2.2 tls 183 1.8.2.2 tls case Q_QUOTAOFF: 184 1.8.2.2 tls error = quotaoff(l, mp, type); 185 1.8.2.2 tls break; 186 1.8.2.2 tls 187 1.8.2.2 tls case Q_SETQUOTA: 188 1.8.2.2 tls error = setquota(mp, uid, type, arg); 189 1.8.2.2 tls break; 190 1.8.2.2 tls 191 1.8.2.2 tls case Q_SETUSE: 192 1.8.2.2 tls error = setuse(mp, uid, type, arg); 193 1.8.2.2 tls break; 194 1.8.2.2 tls 195 1.8.2.2 tls case Q_GETQUOTA: 196 1.8.2.2 tls error = getquota(mp, uid, type, arg); 197 1.8.2.2 tls break; 198 1.8.2.2 tls 199 1.8.2.2 tls case Q_SYNC: 200 1.8.2.2 tls error = lfs_qsync(mp); 201 1.8.2.2 tls break; 202 1.8.2.2 tls 203 1.8.2.2 tls default: 204 1.8.2.2 tls error = EINVAL; 205 1.8.2.2 tls } 206 1.8.2.2 tls mutex_exit(&mp->mnt_updating); 207 1.8.2.3 jdolecek vfs_unbusy(mp); 208 1.8.2.2 tls return (error); 209 1.8.2.2 tls #endif 210 1.8.2.2 tls 211 1.8.2.2 tls /* 212 1.8.2.2 tls * This is the generic part of fhtovp called after the underlying 213 1.8.2.2 tls * filesystem has validated the file handle. 214 1.8.2.2 tls */ 215 1.8.2.2 tls int 216 1.8.2.2 tls ulfs_fhtovp(struct mount *mp, struct ulfs_ufid *ufhp, struct vnode **vpp) 217 1.8.2.2 tls { 218 1.8.2.2 tls struct vnode *nvp; 219 1.8.2.2 tls struct inode *ip; 220 1.8.2.2 tls int error; 221 1.8.2.2 tls 222 1.8.2.2 tls if ((error = VFS_VGET(mp, ufhp->ufid_ino, &nvp)) != 0) { 223 1.8.2.3 jdolecek if (error == ENOENT) 224 1.8.2.3 jdolecek error = ESTALE; 225 1.8.2.2 tls *vpp = NULLVP; 226 1.8.2.2 tls return (error); 227 1.8.2.2 tls } 228 1.8.2.2 tls ip = VTOI(nvp); 229 1.8.2.2 tls KASSERT(ip != NULL); 230 1.8.2.2 tls if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen) { 231 1.8.2.2 tls vput(nvp); 232 1.8.2.2 tls *vpp = NULLVP; 233 1.8.2.2 tls return (ESTALE); 234 1.8.2.2 tls } 235 1.8.2.2 tls *vpp = nvp; 236 1.8.2.2 tls return (0); 237 1.8.2.2 tls } 238 1.8.2.2 tls 239 1.8.2.2 tls /* 240 1.8.2.2 tls * Initialize ULFS filesystems, done only once. 241 1.8.2.2 tls */ 242 1.8.2.2 tls void 243 1.8.2.2 tls ulfs_init(void) 244 1.8.2.2 tls { 245 1.8.2.2 tls if (ulfs_initcount++ > 0) 246 1.8.2.2 tls return; 247 1.8.2.2 tls 248 1.8.2.2 tls #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 249 1.8.2.2 tls lfs_dqinit(); 250 1.8.2.2 tls #endif 251 1.8.2.2 tls #ifdef LFS_DIRHASH 252 1.8.2.2 tls ulfsdirhash_init(); 253 1.8.2.2 tls #endif 254 1.8.2.2 tls #ifdef LFS_EXTATTR 255 1.8.2.2 tls ulfs_extattr_init(); 256 1.8.2.2 tls #endif 257 1.8.2.2 tls } 258 1.8.2.2 tls 259 1.8.2.2 tls void 260 1.8.2.2 tls ulfs_reinit(void) 261 1.8.2.2 tls { 262 1.8.2.3 jdolecek 263 1.8.2.2 tls #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 264 1.8.2.2 tls lfs_dqreinit(); 265 1.8.2.2 tls #endif 266 1.8.2.2 tls } 267 1.8.2.2 tls 268 1.8.2.2 tls /* 269 1.8.2.2 tls * Free ULFS filesystem resources, done only once. 270 1.8.2.2 tls */ 271 1.8.2.2 tls void 272 1.8.2.2 tls ulfs_done(void) 273 1.8.2.2 tls { 274 1.8.2.2 tls if (--ulfs_initcount > 0) 275 1.8.2.2 tls return; 276 1.8.2.2 tls 277 1.8.2.2 tls #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) 278 1.8.2.2 tls lfs_dqdone(); 279 1.8.2.2 tls #endif 280 1.8.2.2 tls #ifdef LFS_DIRHASH 281 1.8.2.2 tls ulfsdirhash_done(); 282 1.8.2.2 tls #endif 283 1.8.2.2 tls #ifdef LFS_EXTATTR 284 1.8.2.2 tls ulfs_extattr_done(); 285 1.8.2.2 tls #endif 286 1.8.2.2 tls } 287
Indexes created Wed Oct 22 00:09:40 GMT 2025