| 1 | /* $NetBSD: smbfs_vfsops.c,v 1.104 2014/12/21 10:48:53 hannken Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2000-2001, Boris Popov |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. All advertising materials mentioning features or use of this software |
| 16 | * must display the following acknowledgement: |
| 17 | * This product includes software developed by Boris Popov. |
| 18 | * 4. Neither the name of the author nor the names of any co-contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * FreeBSD: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.5 2001/12/13 13:08:34 sheldonh Exp |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: smbfs_vfsops.c,v 1.104 2014/12/21 10:48:53 hannken Exp $" ); |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/systm.h> |
| 42 | #include <sys/proc.h> |
| 43 | #include <sys/buf.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/dirent.h> |
| 46 | #include <sys/sysctl.h> |
| 47 | #include <sys/vnode.h> |
| 48 | #include <sys/mount.h> |
| 49 | #include <sys/stat.h> |
| 50 | #include <sys/malloc.h> |
| 51 | #include <sys/kauth.h> |
| 52 | #include <sys/module.h> |
| 53 | #include <miscfs/genfs/genfs.h> |
| 54 | |
| 55 | |
| 56 | #include <netsmb/smb.h> |
| 57 | #include <netsmb/smb_conn.h> |
| 58 | #include <netsmb/smb_subr.h> |
| 59 | #include <netsmb/smb_dev.h> |
| 60 | |
| 61 | #include <fs/smbfs/smbfs.h> |
| 62 | #include <fs/smbfs/smbfs_node.h> |
| 63 | #include <fs/smbfs/smbfs_subr.h> |
| 64 | |
| 65 | MODULE(MODULE_CLASS_VFS, smbfs, "nsmb" ); |
| 66 | |
| 67 | VFS_PROTOS(smbfs); |
| 68 | |
| 69 | static struct sysctllog *smbfs_sysctl_log; |
| 70 | |
| 71 | static int smbfs_setroot(struct mount *); |
| 72 | |
| 73 | extern struct vnodeopv_desc smbfs_vnodeop_opv_desc; |
| 74 | |
| 75 | static const struct vnodeopv_desc *smbfs_vnodeopv_descs[] = { |
| 76 | &smbfs_vnodeop_opv_desc, |
| 77 | NULL, |
| 78 | }; |
| 79 | |
| 80 | struct vfsops smbfs_vfsops = { |
| 81 | .vfs_name = MOUNT_SMBFS, |
| 82 | .vfs_min_mount_data = sizeof (struct smbfs_args), |
| 83 | .vfs_mount = smbfs_mount, |
| 84 | .vfs_start = smbfs_start, |
| 85 | .vfs_unmount = smbfs_unmount, |
| 86 | .vfs_root = smbfs_root, |
| 87 | .vfs_quotactl = (void *)eopnotsupp, |
| 88 | .vfs_statvfs = smbfs_statvfs, |
| 89 | .vfs_sync = smbfs_sync, |
| 90 | .vfs_vget = smbfs_vget, |
| 91 | .vfs_loadvnode = smbfs_loadvnode, |
| 92 | .vfs_fhtovp = (void *)eopnotsupp, |
| 93 | .vfs_vptofh = (void *)eopnotsupp, |
| 94 | .vfs_init = smbfs_init, |
| 95 | .vfs_reinit = smbfs_reinit, |
| 96 | .vfs_done = smbfs_done, |
| 97 | .vfs_mountroot = (void *)eopnotsupp, |
| 98 | .vfs_snapshot = (void *)eopnotsupp, |
| 99 | .vfs_extattrctl = vfs_stdextattrctl, |
| 100 | .vfs_suspendctl = (void *)eopnotsupp, |
| 101 | .vfs_renamelock_enter = genfs_renamelock_enter, |
| 102 | .vfs_renamelock_exit = genfs_renamelock_exit, |
| 103 | .vfs_fsync = (void *)eopnotsupp, |
| 104 | .vfs_opv_descs = smbfs_vnodeopv_descs |
| 105 | }; |
| 106 | |
| 107 | static int |
| 108 | smbfs_modcmd(modcmd_t cmd, void *arg) |
| 109 | { |
| 110 | const struct sysctlnode *smb = NULL; |
| 111 | int error; |
| 112 | |
| 113 | switch (cmd) { |
| 114 | case MODULE_CMD_INIT: |
| 115 | error = vfs_attach(&smbfs_vfsops); |
| 116 | if (error != 0) |
| 117 | break; |
| 118 | sysctl_createv(&smbfs_sysctl_log, 0, NULL, &smb, |
| 119 | CTLFLAG_PERMANENT, |
| 120 | CTLTYPE_NODE, "samba" , |
| 121 | SYSCTL_DESCR("SMB/CIFS remote file system" ), |
| 122 | NULL, 0, NULL, 0, |
| 123 | CTL_VFS, CTL_CREATE, CTL_EOL); |
| 124 | |
| 125 | if (smb != NULL) { |
| 126 | sysctl_createv(&smbfs_sysctl_log, 0, &smb, NULL, |
| 127 | CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, |
| 128 | CTLTYPE_INT, "version" , |
| 129 | SYSCTL_DESCR("smbfs version" ), |
| 130 | NULL, SMBFS_VERSION, NULL, 0, |
| 131 | CTL_CREATE, CTL_EOL); |
| 132 | } |
| 133 | break; |
| 134 | case MODULE_CMD_FINI: |
| 135 | error = vfs_detach(&smbfs_vfsops); |
| 136 | if (error != 0) |
| 137 | break; |
| 138 | sysctl_teardown(&smbfs_sysctl_log); |
| 139 | break; |
| 140 | default: |
| 141 | error = ENOTTY; |
| 142 | break; |
| 143 | } |
| 144 | |
| 145 | return (error); |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | smbfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) |
| 150 | { |
| 151 | struct lwp *l = curlwp; |
| 152 | struct smbfs_args *args = data; /* holds data from mount request */ |
| 153 | struct smbmount *smp = NULL; |
| 154 | struct smb_vc *vcp; |
| 155 | struct smb_share *ssp = NULL; |
| 156 | struct smb_cred scred; |
| 157 | char *fromname; |
| 158 | int error; |
| 159 | |
| 160 | if (args == NULL) |
| 161 | return EINVAL; |
| 162 | if (*data_len < sizeof *args) |
| 163 | return EINVAL; |
| 164 | |
| 165 | if (mp->mnt_flag & MNT_GETARGS) { |
| 166 | smp = VFSTOSMBFS(mp); |
| 167 | if (smp == NULL) |
| 168 | return EIO; |
| 169 | *args = smp->sm_args; |
| 170 | *data_len = sizeof *args; |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | if (mp->mnt_flag & MNT_UPDATE) |
| 175 | return EOPNOTSUPP; |
| 176 | |
| 177 | if (args->version != SMBFS_VERSION) { |
| 178 | SMBVDEBUG("mount version mismatch: kernel=%d, mount=%d\n" , |
| 179 | SMBFS_VERSION, args->version); |
| 180 | return EINVAL; |
| 181 | } |
| 182 | |
| 183 | smb_makescred(&scred, l, l->l_cred); |
| 184 | error = smb_dev2share(args->dev_fd, SMBM_EXEC, &scred, &ssp); |
| 185 | if (error) |
| 186 | return error; |
| 187 | smb_share_unlock(ssp); /* keep ref, but unlock */ |
| 188 | vcp = SSTOVC(ssp); |
| 189 | |
| 190 | fromname = kmem_zalloc(MNAMELEN, KM_SLEEP); |
| 191 | snprintf(fromname, MNAMELEN, |
| 192 | "//%s@%s/%s" , vcp->vc_username, vcp->vc_srvname, ssp->ss_name); |
| 193 | error = set_statvfs_info(path, UIO_USERSPACE, fromname, UIO_SYSSPACE, |
| 194 | mp->mnt_op->vfs_name, mp, l); |
| 195 | kmem_free(fromname, MNAMELEN); |
| 196 | if (error) { |
| 197 | smb_share_lock(ssp); |
| 198 | smb_share_put(ssp, &scred); |
| 199 | return error; |
| 200 | } |
| 201 | |
| 202 | mp->mnt_stat.f_iosize = vcp->vc_txmax; |
| 203 | mp->mnt_stat.f_namemax = |
| 204 | (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12; |
| 205 | |
| 206 | smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_ZERO); |
| 207 | mp->mnt_data = smp; |
| 208 | |
| 209 | smp->sm_share = ssp; |
| 210 | smp->sm_root = NULL; |
| 211 | smp->sm_args = *args; |
| 212 | smp->sm_caseopt = args->caseopt; |
| 213 | smp->sm_args.file_mode = (smp->sm_args.file_mode & |
| 214 | (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; |
| 215 | smp->sm_args.dir_mode = (smp->sm_args.dir_mode & |
| 216 | (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; |
| 217 | |
| 218 | vfs_getnewfsid(mp); |
| 219 | return (0); |
| 220 | } |
| 221 | |
| 222 | /* Unmount the filesystem described by mp. */ |
| 223 | int |
| 224 | smbfs_unmount(struct mount *mp, int mntflags) |
| 225 | { |
| 226 | struct lwp *l = curlwp; |
| 227 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 228 | struct smb_cred scred; |
| 229 | struct vnode *smbfs_rootvp = SMBTOV(smp->sm_root); |
| 230 | int error, flags; |
| 231 | |
| 232 | SMBVDEBUG("smbfs_unmount: flags=%04x\n" , mntflags); |
| 233 | flags = 0; |
| 234 | if (mntflags & MNT_FORCE) |
| 235 | flags |= FORCECLOSE; |
| 236 | |
| 237 | if (smbfs_rootvp->v_usecount > 1 && (mntflags & MNT_FORCE) == 0) |
| 238 | return EBUSY; |
| 239 | |
| 240 | /* Flush all vnodes. |
| 241 | * Keep trying to flush the vnode list for the mount while |
| 242 | * some are still busy and we are making progress towards |
| 243 | * making them not busy. This is needed because smbfs vnodes |
| 244 | * reference their parent directory but may appear after their |
| 245 | * parent in the list; one pass over the vnode list is not |
| 246 | * sufficient in this case. */ |
| 247 | do { |
| 248 | smp->sm_didrele = 0; |
| 249 | error = vflush(mp, smbfs_rootvp, flags); |
| 250 | } while (error == EBUSY && smp->sm_didrele != 0); |
| 251 | if (error) |
| 252 | return error; |
| 253 | |
| 254 | vgone(smbfs_rootvp); |
| 255 | |
| 256 | smb_makescred(&scred, l, l->l_cred); |
| 257 | smb_share_lock(smp->sm_share); |
| 258 | smb_share_put(smp->sm_share, &scred); |
| 259 | mp->mnt_data = NULL; |
| 260 | |
| 261 | free(smp, M_SMBFSDATA); |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | /* |
| 266 | * Get root vnode of the smbfs filesystem, and store it in sm_root. |
| 267 | */ |
| 268 | static int |
| 269 | smbfs_setroot(struct mount *mp) |
| 270 | { |
| 271 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 272 | struct vnode *vp; |
| 273 | struct smbfattr fattr; |
| 274 | struct lwp *l = curlwp; |
| 275 | kauth_cred_t cred = l->l_cred; |
| 276 | struct smb_cred scred; |
| 277 | int error; |
| 278 | |
| 279 | KASSERT(smp->sm_root == NULL); |
| 280 | |
| 281 | smb_makescred(&scred, l, cred); |
| 282 | error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); |
| 283 | if (error) |
| 284 | return error; |
| 285 | error = smbfs_nget(mp, NULL, "TheRooT" , 7, &fattr, &vp); |
| 286 | if (error) |
| 287 | return error; |
| 288 | |
| 289 | /* |
| 290 | * Someone might have already set sm_root while we slept |
| 291 | * in smb_lookup or vnode allocation. |
| 292 | */ |
| 293 | if (smp->sm_root) { |
| 294 | KASSERT(smp->sm_root == VTOSMB(vp)); |
| 295 | vrele(vp); |
| 296 | } else { |
| 297 | vp->v_vflag |= VV_ROOT; |
| 298 | smp->sm_root = VTOSMB(vp); |
| 299 | } |
| 300 | |
| 301 | return (0); |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * Return locked root vnode of a filesystem. |
| 306 | */ |
| 307 | int |
| 308 | smbfs_root(struct mount *mp, struct vnode **vpp) |
| 309 | { |
| 310 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 311 | int error; |
| 312 | |
| 313 | if (__predict_false(!smp->sm_root)) { |
| 314 | error = smbfs_setroot(mp); |
| 315 | if (error) |
| 316 | return (error); |
| 317 | /* fallthrough */ |
| 318 | } |
| 319 | |
| 320 | KASSERT(smp->sm_root != NULL && SMBTOV(smp->sm_root) != NULL); |
| 321 | *vpp = SMBTOV(smp->sm_root); |
| 322 | vref(*vpp); |
| 323 | error = vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY); |
| 324 | if (error) |
| 325 | vrele(*vpp); |
| 326 | return error; |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * Make a filesystem operational. |
| 331 | * Nothing to do at the moment. |
| 332 | */ |
| 333 | /* ARGSUSED */ |
| 334 | int |
| 335 | smbfs_start(struct mount *mp, int flags) |
| 336 | { |
| 337 | SMBVDEBUG("flags=%04x\n" , flags); |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | void |
| 342 | smbfs_init(void) |
| 343 | { |
| 344 | |
| 345 | malloc_type_attach(M_SMBNODENAME); |
| 346 | malloc_type_attach(M_SMBFSDATA); |
| 347 | pool_init(&smbfs_node_pool, sizeof(struct smbnode), 0, 0, 0, |
| 348 | "smbfsnopl" , &pool_allocator_nointr, IPL_NONE); |
| 349 | |
| 350 | SMBVDEBUG0("init.\n" ); |
| 351 | } |
| 352 | |
| 353 | void |
| 354 | smbfs_reinit(void) |
| 355 | { |
| 356 | |
| 357 | SMBVDEBUG0("reinit.\n" ); |
| 358 | } |
| 359 | |
| 360 | void |
| 361 | smbfs_done(void) |
| 362 | { |
| 363 | |
| 364 | pool_destroy(&smbfs_node_pool); |
| 365 | malloc_type_detach(M_SMBNODENAME); |
| 366 | malloc_type_detach(M_SMBFSDATA); |
| 367 | |
| 368 | SMBVDEBUG0("done.\n" ); |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * smbfs_statvfs call |
| 373 | */ |
| 374 | int |
| 375 | smbfs_statvfs(struct mount *mp, struct statvfs *sbp) |
| 376 | { |
| 377 | struct lwp *l = curlwp; |
| 378 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 379 | struct smb_share *ssp = smp->sm_share; |
| 380 | struct smb_cred scred; |
| 381 | int error = 0; |
| 382 | |
| 383 | sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ |
| 384 | smb_makescred(&scred, l, l->l_cred); |
| 385 | |
| 386 | error = smbfs_smb_statvfs(ssp, sbp, &scred); |
| 387 | if (error) |
| 388 | return error; |
| 389 | |
| 390 | sbp->f_flag = 0; /* copy of mount exported flags */ |
| 391 | sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ |
| 392 | copy_statvfs_info(sbp, mp); |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static bool |
| 397 | smbfs_sync_selector(void *cl, struct vnode *vp) |
| 398 | { |
| 399 | struct smbnode *np; |
| 400 | |
| 401 | np = VTOSMB(vp); |
| 402 | if (np == NULL) |
| 403 | return false; |
| 404 | |
| 405 | if ((vp->v_type == VNON || (np->n_flag & NMODIFIED) == 0) && |
| 406 | LIST_EMPTY(&vp->v_dirtyblkhd) && |
| 407 | UVM_OBJ_IS_CLEAN(&vp->v_uobj)) |
| 408 | return false; |
| 409 | |
| 410 | return true; |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * Flush out the buffer cache |
| 415 | */ |
| 416 | int |
| 417 | smbfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) |
| 418 | { |
| 419 | struct vnode *vp; |
| 420 | struct vnode_iterator *marker; |
| 421 | int error, allerror = 0; |
| 422 | |
| 423 | vfs_vnode_iterator_init(mp, &marker); |
| 424 | while ((vp = vfs_vnode_iterator_next(marker, smbfs_sync_selector, |
| 425 | NULL))) |
| 426 | { |
| 427 | error = vn_lock(vp, LK_EXCLUSIVE); |
| 428 | if (error) { |
| 429 | vrele(vp); |
| 430 | continue; |
| 431 | } |
| 432 | error = VOP_FSYNC(vp, cred, |
| 433 | waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); |
| 434 | if (error) |
| 435 | allerror = error; |
| 436 | vput(vp); |
| 437 | } |
| 438 | vfs_vnode_iterator_destroy(marker); |
| 439 | return (allerror); |
| 440 | } |
| 441 | |
| 442 | #if __FreeBSD_version < 400009 |
| 443 | /* |
| 444 | * smbfs flat namespace lookup. Unsupported. |
| 445 | */ |
| 446 | /* ARGSUSED */ |
| 447 | int smbfs_vget(struct mount *mp, ino_t ino, |
| 448 | struct vnode **vpp) |
| 449 | { |
| 450 | return (EOPNOTSUPP); |
| 451 | } |
| 452 | |
| 453 | #endif /* __FreeBSD_version < 400009 */ |
| 454 | |