1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * General Structures Layout 28 * ------------------------- 29 * 30 * This is a simplified diagram showing the relationship between most of the 31 * main structures. 32 * 33 * +-------------------+ 34 * | SMB_INFO | 35 * +-------------------+ 36 * | 37 * | 38 * v 39 * +-------------------+ +-------------------+ +-------------------+ 40 * | SESSION |<----->| SESSION |......| SESSION | 41 * +-------------------+ +-------------------+ +-------------------+ 42 * | 43 * | 44 * v 45 * +-------------------+ +-------------------+ +-------------------+ 46 * | USER |<----->| USER |......| USER | 47 * +-------------------+ +-------------------+ +-------------------+ 48 * | 49 * | 50 * v 51 * +-------------------+ +-------------------+ +-------------------+ 52 * | TREE |<----->| TREE |......| TREE | 53 * +-------------------+ +-------------------+ +-------------------+ 54 * | | 55 * | | 56 * | v 57 * | +-------+ +-------+ +-------+ 58 * | | OFILE |<----->| OFILE |......| OFILE | 59 * | +-------+ +-------+ +-------+ 60 * | 61 * | 62 * v 63 * +-------+ +------+ +------+ 64 * | ODIR |<----->| ODIR |......| ODIR | 65 * +-------+ +------+ +------+ 66 * 67 * 68 * Tree State Machine 69 * ------------------ 70 * 71 * +-----------------------------+ T0 72 * | SMB_TREE_STATE_CONNECTED |<----------- Creation/Allocation 73 * +-----------------------------+ 74 * | 75 * | T1 76 * | 77 * v 78 * +------------------------------+ 79 * | SMB_TREE_STATE_DISCONNECTING | 80 * +------------------------------+ 81 * | 82 * | T2 83 * | 84 * v 85 * +-----------------------------+ T3 86 * | SMB_TREE_STATE_DISCONNECTED |----------> Deletion/Free 87 * +-----------------------------+ 88 * 89 * SMB_TREE_STATE_CONNECTED 90 * 91 * While in this state: 92 * - The tree is queued in the list of trees of its user. 93 * - References will be given out if the tree is looked up. 94 * - Files under that tree can be accessed. 95 * 96 * SMB_TREE_STATE_DISCONNECTING 97 * 98 * While in this state: 99 * - The tree is queued in the list of trees of its user. 100 * - References will not be given out if the tree is looked up. 101 * - The files and directories open under the tree are being closed. 102 * - The resources associated with the tree remain. 103 * 104 * SMB_TREE_STATE_DISCONNECTED 105 * 106 * While in this state: 107 * - The tree is queued in the list of trees of its user. 108 * - References will not be given out if the tree is looked up. 109 * - The tree has no more files and directories opened. 110 * - The resources associated with the tree remain. 111 * 112 * Transition T0 113 * 114 * This transition occurs in smb_tree_connect(). A new tree is created and 115 * added to the list of trees of a user. 116 * 117 * Transition T1 118 * 119 * This transition occurs in smb_tree_disconnect(). 120 * 121 * Transition T2 122 * 123 * This transition occurs in smb_tree_release(). The resources associated 124 * with the tree are freed as well as the tree structure. For the transition 125 * to occur, the tree must be in the SMB_TREE_STATE_DISCONNECTED state and 126 * the reference count be zero. 127 * 128 * Comments 129 * -------- 130 * 131 * The state machine of the tree structures is controlled by 3 elements: 132 * - The list of trees of the user it belongs to. 133 * - The mutex embedded in the structure itself. 134 * - The reference count. 135 * 136 * There's a mutex embedded in the tree structure used to protect its fields 137 * and there's a lock embedded in the list of trees of a user. To 138 * increment or to decrement the reference count the mutex must be entered. 139 * To insert the tree into the list of trees of the user and to remove 140 * the tree from it, the lock must be entered in RW_WRITER mode. 141 * 142 * Rules of access to a tree structure: 143 * 144 * 1) In order to avoid deadlocks, when both (mutex and lock of the user 145 * list) have to be entered, the lock must be entered first. 146 * 147 * 2) All actions applied to a tree require a reference count. 148 * 149 * 3) There are 2 ways of getting a reference count: when a tree is 150 * connected and when a tree is looked up. 151 * 152 * It should be noted that the reference count of a tree registers the 153 * number of references to the tree in other structures (such as an smb 154 * request). The reference count is not incremented in these 2 instances: 155 * 156 * 1) The tree is connected. An tree is anchored by his state. If there's 157 * no activity involving a tree currently connected, the reference 158 * count of that tree is zero. 159 * 160 * 2) The tree is queued in the list of trees of the user. The fact of 161 * being queued in that list is NOT registered by incrementing the 162 * reference count. 163 */ 164 #include <sys/types.h> 165 #include <sys/refstr_impl.h> 166 #include <sys/feature_tests.h> 167 #include <sys/sunddi.h> 168 #include <sys/fsid.h> 169 #include <sys/vfs.h> 170 #include <sys/stat.h> 171 #include <sys/varargs.h> 172 #include <smbsrv/smb_incl.h> 173 #include <smbsrv/lmerr.h> 174 #include <smbsrv/smb_fsops.h> 175 #include <smbsrv/smb_door_svc.h> 176 #include <smbsrv/smb_share.h> 177 #include <sys/pathname.h> 178 179 int smb_tcon_mute = 0; 180 181 static smb_tree_t *smb_tree_connect_disk(smb_request_t *, const char *); 182 static smb_tree_t *smb_tree_connect_ipc(smb_request_t *, const char *); 183 static smb_tree_t *smb_tree_alloc(smb_user_t *, const char *, const char *, 184 int32_t, smb_node_t *, uint32_t); 185 static void smb_tree_dealloc(smb_tree_t *); 186 static boolean_t smb_tree_is_connected(smb_tree_t *); 187 static boolean_t smb_tree_is_disconnected(smb_tree_t *); 188 static const char *smb_tree_get_sharename(const char *); 189 static int smb_tree_get_stype(const char *, const char *, int32_t *); 190 static int smb_tree_getattr(smb_node_t *, smb_tree_t *); 191 static void smb_tree_get_volname(vfs_t *, smb_tree_t *); 192 static void smb_tree_get_flags(vfs_t *, smb_tree_t *); 193 static void smb_tree_log(smb_request_t *, const char *, const char *, ...); 194 static void smb_tree_close_odirs(smb_tree_t *, uint16_t); 195 static smb_odir_t *smb_tree_get_odir(smb_tree_t *, smb_odir_t *); 196 197 /* 198 * Extract the share name and share type and connect as appropriate. 199 * Share names are case insensitive so we map the share name to 200 * lower-case as a convenience for internal processing. 201 */ 202 smb_tree_t * 203 smb_tree_connect(smb_request_t *sr) 204 { 205 char *unc_path = sr->arg.tcon.path; 206 char *service = sr->arg.tcon.service; 207 smb_tree_t *tree = NULL; 208 const char *name; 209 int32_t stype; 210 211 (void) utf8_strlwr(unc_path); 212 213 if ((name = smb_tree_get_sharename(unc_path)) == NULL) { 214 smbsr_error(sr, 0, ERRSRV, ERRinvnetname); 215 return (NULL); 216 } 217 218 if (smb_tree_get_stype(name, service, &stype) != 0) { 219 smbsr_error(sr, NT_STATUS_BAD_DEVICE_TYPE, 220 ERRDOS, ERROR_BAD_DEV_TYPE); 221 return (NULL); 222 } 223 224 switch (stype & STYPE_MASK) { 225 case STYPE_DISKTREE: 226 tree = smb_tree_connect_disk(sr, name); 227 break; 228 229 case STYPE_IPC: 230 tree = smb_tree_connect_ipc(sr, name); 231 break; 232 233 default: 234 smbsr_error(sr, NT_STATUS_BAD_DEVICE_TYPE, 235 ERRDOS, ERROR_BAD_DEV_TYPE); 236 break; 237 } 238 239 return (tree); 240 } 241 242 /* 243 * Disconnect a tree. 244 */ 245 void 246 smb_tree_disconnect( 247 smb_tree_t *tree) 248 { 249 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 250 251 mutex_enter(&tree->t_mutex); 252 ASSERT(tree->t_refcnt); 253 254 if (smb_tree_is_connected(tree)) { 255 /* 256 * Indicate that the disconnect process has started. 257 */ 258 tree->t_state = SMB_TREE_STATE_DISCONNECTING; 259 mutex_exit(&tree->t_mutex); 260 atomic_dec_32(&tree->t_server->sv_open_trees); 261 262 /* 263 * The files opened under this tree are closed. 264 */ 265 smb_ofile_close_all(tree); 266 /* 267 * The directories opened under this tree are closed. 268 */ 269 smb_tree_close_odirs(tree, 0); 270 mutex_enter(&tree->t_mutex); 271 tree->t_state = SMB_TREE_STATE_DISCONNECTED; 272 } 273 274 mutex_exit(&tree->t_mutex); 275 } 276 277 /* 278 * Take a reference on a tree. 279 */ 280 boolean_t 281 smb_tree_hold( 282 smb_tree_t *tree) 283 { 284 ASSERT(tree); 285 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 286 287 mutex_enter(&tree->t_mutex); 288 289 if (smb_tree_is_connected(tree)) { 290 tree->t_refcnt++; 291 mutex_exit(&tree->t_mutex); 292 return (B_TRUE); 293 } 294 295 mutex_exit(&tree->t_mutex); 296 return (B_FALSE); 297 } 298 299 /* 300 * Release a reference on a tree. If the tree is disconnected and the 301 * reference count falls to zero, the tree will be deallocated. 302 */ 303 void 304 smb_tree_release( 305 smb_tree_t *tree) 306 { 307 ASSERT(tree); 308 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 309 310 mutex_enter(&tree->t_mutex); 311 ASSERT(tree->t_refcnt); 312 tree->t_refcnt--; 313 314 if (smb_tree_is_disconnected(tree) && (tree->t_refcnt == 0)) { 315 mutex_exit(&tree->t_mutex); 316 smb_tree_dealloc(tree); 317 return; 318 } 319 320 mutex_exit(&tree->t_mutex); 321 } 322 323 /* 324 * Close ofiles and odirs that match pid. 325 */ 326 void 327 smb_tree_close_pid( 328 smb_tree_t *tree, 329 uint16_t pid) 330 { 331 ASSERT(tree); 332 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 333 334 smb_ofile_close_all_by_pid(tree, pid); 335 smb_tree_close_odirs(tree, pid); 336 } 337 338 /* 339 * Check whether or not a tree supports the features identified by flags. 340 */ 341 boolean_t 342 smb_tree_has_feature(smb_tree_t *tree, uint32_t flags) 343 { 344 ASSERT(tree); 345 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 346 347 return ((tree->t_flags & flags) == flags); 348 } 349 350 351 /* *************************** Static Functions ***************************** */ 352 #define SHARES_DIR ".zfs/shares/" 353 static void 354 smb_tree_acl_access(cred_t *cred, const char *sharename, vnode_t *pathvp, 355 uint32_t *access) 356 { 357 int rc; 358 vfs_t *vfsp; 359 vnode_t *root = NULL; 360 vnode_t *sharevp = NULL; 361 char *sharepath; 362 struct pathname pnp; 363 size_t size; 364 365 *access = ACE_ALL_PERMS; /* default to full "UNIX" access */ 366 367 /* 368 * Using the vnode of the share path, we then find the root 369 * directory of the mounted file system. We will then look to 370 * see if there is a .zfs/shares directory and if there is, 371 * get the access information from the ACL/ACES values and 372 * check against the cred. 373 */ 374 vfsp = pathvp->v_vfsp; 375 if (vfsp != NULL) 376 rc = VFS_ROOT(vfsp, &root); 377 else 378 rc = ENOENT; 379 380 if (rc != 0) 381 return; 382 383 384 /* 385 * Find the share object, if there is one. Need to construct 386 * the path to the .zfs/shares/<sharename> object and look it 387 * up. root is called held but will be released by 388 * lookuppnvp(). 389 */ 390 391 size = sizeof (SHARES_DIR) + strlen(sharename) + 1; 392 sharepath = kmem_alloc(size, KM_SLEEP); 393 (void) sprintf(sharepath, "%s%s", SHARES_DIR, sharename); 394 395 pn_alloc(&pnp); 396 (void) pn_set(&pnp, sharepath); 397 rc = lookuppnvp(&pnp, NULL, NO_FOLLOW, NULL, 398 &sharevp, rootdir, root, kcred); 399 pn_free(&pnp); 400 401 kmem_free(sharepath, size); 402 403 /* 404 * Now get the effective access value based on cred and ACL 405 * values. 406 */ 407 408 if (rc == 0) 409 smb_vop_eaccess(sharevp, (int *)access, V_ACE_MASK, NULL, cred); 410 411 } 412 413 /* 414 * Connect a share for use with files and directories. 415 */ 416 417 static smb_tree_t * 418 smb_tree_connect_disk(smb_request_t *sr, const char *sharename) 419 { 420 smb_user_t *user = sr->uid_user; 421 smb_node_t *dir_snode = NULL; 422 smb_node_t *snode = NULL; 423 char last_component[MAXNAMELEN]; 424 smb_tree_t *tree; 425 smb_share_t *si; 426 smb_attr_t attr; 427 cred_t *u_cred; 428 int rc; 429 uint32_t access = 0; /* read/write is assumed */ 430 uint32_t hostaccess = ACE_ALL_PERMS; 431 uint32_t aclaccess; 432 433 ASSERT(user); 434 u_cred = user->u_cred; 435 ASSERT(u_cred); 436 437 if (user->u_flags & SMB_USER_FLAG_IPC) { 438 smb_tree_log(sr, sharename, "access denied: IPC only"); 439 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRSRV, ERRaccess); 440 return (NULL); 441 } 442 443 si = kmem_zalloc(sizeof (smb_share_t), KM_SLEEP); 444 445 if (smb_kshare_getinfo(sr->sr_server->sv_lmshrd, (char *)sharename, si, 446 &sr->session->ipaddr) != NERR_Success) { 447 smb_tree_log(sr, sharename, "share not found"); 448 smbsr_error(sr, 0, ERRSRV, ERRinvnetname); 449 kmem_free(si, sizeof (smb_share_t)); 450 return (NULL); 451 } 452 453 /* 454 * Handle the default administration shares: C$, D$ etc. 455 * Only a user with admin rights is allowed to map these 456 * shares. 457 */ 458 if (si->shr_flags & SMB_SHRF_ADMIN) { 459 if (!smb_user_is_admin(user)) { 460 smb_tree_log(sr, sharename, "access denied: not admin"); 461 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, 462 ERRSRV, ERRaccess); 463 kmem_free(si, sizeof (smb_share_t)); 464 return (NULL); 465 } 466 } 467 468 /* 469 * Set up the OptionalSupport for this share. 470 */ 471 sr->arg.tcon.optional_support = SMB_SUPPORT_SEARCH_BITS; 472 473 switch (si->shr_flags & SMB_SHRF_CSC_MASK) { 474 case SMB_SHRF_CSC_DISABLED: 475 sr->arg.tcon.optional_support |= SMB_CSC_CACHE_NONE; 476 break; 477 case SMB_SHRF_CSC_AUTO: 478 sr->arg.tcon.optional_support |= SMB_CSC_CACHE_AUTO_REINT; 479 break; 480 case SMB_SHRF_CSC_VDO: 481 sr->arg.tcon.optional_support |= SMB_CSC_CACHE_VDO; 482 break; 483 case SMB_SHRF_CSC_MANUAL: 484 default: 485 /* 486 * Default to SMB_CSC_CACHE_MANUAL_REINT. 487 */ 488 break; 489 } 490 491 access = si->shr_access_value & SMB_SHRF_ACC_ALL; 492 493 if (access == SMB_SHRF_ACC_RO) { 494 hostaccess &= ~ACE_ALL_WRITE_PERMS; 495 } else if (access == SMB_SHRF_ACC_NONE) { 496 kmem_free(si, sizeof (smb_share_t)); 497 smb_tree_log(sr, sharename, "access denied: host access"); 498 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRSRV, ERRaccess); 499 return (NULL); 500 } 501 502 /* 503 * Check that the shared directory exists. 504 */ 505 rc = smb_pathname_reduce(sr, u_cred, si->shr_path, 0, 0, &dir_snode, 506 last_component); 507 508 if (rc == 0) { 509 rc = smb_fsop_lookup(sr, u_cred, SMB_FOLLOW_LINKS, 0, 510 dir_snode, last_component, &snode, &attr, 0, 0); 511 512 smb_node_release(dir_snode); 513 } 514 515 if (rc) { 516 if (snode) 517 smb_node_release(snode); 518 519 smb_tree_log(sr, sharename, "bad path: %s", si->shr_path); 520 smbsr_error(sr, 0, ERRSRV, ERRinvnetname); 521 kmem_free(si, sizeof (smb_share_t)); 522 return (NULL); 523 } 524 525 /* 526 * Find share level ACL if it exists in the designated 527 * location. Needs to be done after finding a valid path but 528 * before the tree is allocated. 529 */ 530 smb_tree_acl_access(u_cred, sharename, snode->vp, &aclaccess); 531 /* if an error, then no share file -- default to no ACL */ 532 if (rc == 0) { 533 /* 534 * There need to be some permissions in order to have 535 * any access. 536 */ 537 if ((aclaccess & ACE_ALL_PERMS) == 0) { 538 smb_tree_log(sr, sharename, "access denied: share ACL"); 539 smbsr_error(sr, 0, ERRSRV, ERRaccess); 540 kmem_free(si, sizeof (smb_share_t)); 541 smb_node_release(snode); 542 return (NULL); 543 } 544 } 545 546 /* 547 * Set tree ACL access to the minimum ACL permissions based on 548 * hostaccess (those allowed by host based access) and 549 * aclaccess (those from the ACL object for the share). This 550 * is done during the alloc. 551 */ 552 tree = smb_tree_alloc(user, sharename, si->shr_path, STYPE_DISKTREE, 553 snode, hostaccess & aclaccess); 554 555 if (tree == NULL) 556 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRSRV, ERRaccess); 557 558 smb_node_release(snode); 559 kmem_free(si, sizeof (smb_share_t)); 560 return (tree); 561 } 562 563 /* 564 * Connect an IPC share for use with named pipes. 565 */ 566 static smb_tree_t * 567 smb_tree_connect_ipc(smb_request_t *sr, const char *name) 568 { 569 smb_user_t *user = sr->uid_user; 570 smb_tree_t *tree; 571 572 ASSERT(user); 573 574 if ((user->u_flags & SMB_USER_FLAG_IPC) && 575 sr->sr_cfg->skc_restrict_anon) { 576 smb_tree_log(sr, name, "access denied: restrict anonymous"); 577 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRSRV, ERRaccess); 578 return (NULL); 579 } 580 581 sr->arg.tcon.optional_support = SMB_SUPPORT_SEARCH_BITS; 582 583 tree = smb_tree_alloc(user, name, name, STYPE_IPC, NULL, ACE_ALL_PERMS); 584 if (tree == NULL) { 585 smb_tree_log(sr, name, "access denied"); 586 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRSRV, ERRaccess); 587 } 588 589 return (tree); 590 } 591 592 /* 593 * Allocate a tree. 594 */ 595 static smb_tree_t * 596 smb_tree_alloc( 597 smb_user_t *user, 598 const char *sharename, 599 const char *resource, 600 int32_t stype, 601 smb_node_t *snode, 602 uint32_t access) 603 { 604 smb_tree_t *tree; 605 uint16_t tid; 606 607 if (smb_idpool_alloc(&user->u_tid_pool, &tid)) 608 return (NULL); 609 610 tree = kmem_cache_alloc(user->u_server->si_cache_tree, KM_SLEEP); 611 bzero(tree, sizeof (smb_tree_t)); 612 613 if (STYPE_ISDSK(stype)) { 614 if (smb_tree_getattr(snode, tree) != 0) { 615 smb_idpool_free(&user->u_tid_pool, tid); 616 kmem_cache_free(user->u_server->si_cache_tree, tree); 617 return (NULL); 618 } 619 } 620 621 if (smb_idpool_constructor(&tree->t_fid_pool)) { 622 smb_idpool_free(&user->u_tid_pool, tid); 623 kmem_cache_free(user->u_server->si_cache_tree, tree); 624 return (NULL); 625 } 626 627 if (smb_idpool_constructor(&tree->t_odid_pool)) { 628 smb_idpool_destructor(&tree->t_fid_pool); 629 smb_idpool_free(&user->u_tid_pool, tid); 630 kmem_cache_free(user->u_server->si_cache_tree, tree); 631 return (NULL); 632 } 633 634 smb_llist_constructor(&tree->t_ofile_list, sizeof (smb_ofile_t), 635 offsetof(smb_ofile_t, f_lnd)); 636 637 smb_llist_constructor(&tree->t_odir_list, sizeof (smb_odir_t), 638 offsetof(smb_odir_t, d_lnd)); 639 640 (void) strlcpy(tree->t_sharename, sharename, 641 sizeof (tree->t_sharename)); 642 (void) strlcpy(tree->t_resource, resource, sizeof (tree->t_resource)); 643 644 mutex_init(&tree->t_mutex, NULL, MUTEX_DEFAULT, NULL); 645 646 tree->t_user = user; 647 tree->t_session = user->u_session; 648 tree->t_server = user->u_server; 649 tree->t_refcnt = 1; 650 tree->t_tid = tid; 651 tree->t_res_type = stype; 652 tree->t_state = SMB_TREE_STATE_CONNECTED; 653 tree->t_magic = SMB_TREE_MAGIC; 654 tree->t_access = access; 655 656 /* if FS is readonly, enforce that here */ 657 if (tree->t_flags & SMB_TREE_READONLY) 658 tree->t_access &= ~ACE_ALL_WRITE_PERMS; 659 660 if (STYPE_ISDSK(stype)) { 661 smb_node_ref(snode); 662 tree->t_snode = snode; 663 tree->t_acltype = smb_fsop_acltype(snode); 664 } 665 666 smb_llist_enter(&user->u_tree_list, RW_WRITER); 667 smb_llist_insert_head(&user->u_tree_list, tree); 668 smb_llist_exit(&user->u_tree_list); 669 atomic_inc_32(&user->u_session->s_tree_cnt); 670 atomic_inc_32(&user->u_server->sv_open_trees); 671 672 return (tree); 673 } 674 675 /* 676 * Deallocate a tree: release all resources associated with a tree and 677 * remove the tree from the user's tree list. 678 * 679 * The tree being destroyed must be in the "destroying" state and the 680 * reference count must be zero. This function assumes it's single threaded 681 * i.e. only one thread will attempt to destroy a specific tree, which 682 * should be the case if the tree is in disconnected and has a reference 683 * count of zero. 684 */ 685 static void 686 smb_tree_dealloc(smb_tree_t *tree) 687 { 688 ASSERT(tree); 689 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 690 ASSERT(tree->t_state == SMB_TREE_STATE_DISCONNECTED); 691 ASSERT(tree->t_refcnt == 0); 692 693 /* 694 * Remove the tree from the user's tree list. This must be done 695 * before any resources associated with the tree are released. 696 */ 697 smb_llist_enter(&tree->t_user->u_tree_list, RW_WRITER); 698 smb_llist_remove(&tree->t_user->u_tree_list, tree); 699 smb_llist_exit(&tree->t_user->u_tree_list); 700 701 tree->t_magic = (uint32_t)~SMB_TREE_MAGIC; 702 smb_idpool_free(&tree->t_user->u_tid_pool, tree->t_tid); 703 atomic_dec_32(&tree->t_session->s_tree_cnt); 704 705 if (tree->t_snode) 706 smb_node_release(tree->t_snode); 707 708 mutex_destroy(&tree->t_mutex); 709 710 /* 711 * The list of open files and open directories should be empty. 712 */ 713 smb_llist_destructor(&tree->t_ofile_list); 714 smb_llist_destructor(&tree->t_odir_list); 715 smb_idpool_destructor(&tree->t_fid_pool); 716 smb_idpool_destructor(&tree->t_odid_pool); 717 kmem_cache_free(tree->t_server->si_cache_tree, tree); 718 } 719 720 /* 721 * Determine whether or not a tree is connected. 722 * This function must be called with the tree mutex held. 723 */ 724 static boolean_t 725 smb_tree_is_connected(smb_tree_t *tree) 726 { 727 switch (tree->t_state) { 728 case SMB_TREE_STATE_CONNECTED: 729 return (B_TRUE); 730 731 case SMB_TREE_STATE_DISCONNECTING: 732 case SMB_TREE_STATE_DISCONNECTED: 733 /* 734 * The tree exists but being diconnected or destroyed. 735 */ 736 return (B_FALSE); 737 738 default: 739 ASSERT(0); 740 return (B_FALSE); 741 } 742 } 743 744 /* 745 * Determine whether or not a tree is disconnected. 746 * This function must be called with the tree mutex held. 747 */ 748 static boolean_t 749 smb_tree_is_disconnected(smb_tree_t *tree) 750 { 751 switch (tree->t_state) { 752 case SMB_TREE_STATE_DISCONNECTED: 753 return (B_TRUE); 754 755 case SMB_TREE_STATE_CONNECTED: 756 case SMB_TREE_STATE_DISCONNECTING: 757 return (B_FALSE); 758 759 default: 760 ASSERT(0); 761 return (B_FALSE); 762 } 763 } 764 765 /* 766 * Return a pointer to the share name within a share resource path. 767 * 768 * The share path may be a Uniform Naming Convention (UNC) string 769 * (\\server\share) or simply the share name. We validate the UNC 770 * format but we don't look at the server name. 771 */ 772 static const char * 773 smb_tree_get_sharename(const char *unc_path) 774 { 775 const char *sharename = unc_path; 776 777 if (sharename[0] == '\\') { 778 /* 779 * Looks like a UNC path, validate the format. 780 */ 781 if (sharename[1] != '\\') 782 return (NULL); 783 784 if ((sharename = strchr(sharename+2, '\\')) == NULL) 785 return (NULL); 786 787 ++sharename; 788 } else if (strchr(sharename, '\\') != NULL) { 789 /* 790 * This should be a share name (no embedded \'s). 791 */ 792 return (NULL); 793 } 794 795 return (sharename); 796 } 797 798 /* 799 * Map the service to a resource type. Valid values for service are: 800 * 801 * A: Disk share 802 * LPT1: Printer 803 * IPC Named pipe 804 * COMM Communications device 805 * ????? Any type of device (wildcard) 806 * 807 * We support IPC and disk shares; anything else is currently treated 808 * as an error. IPC$ is reserved as the named pipe share. 809 */ 810 static int 811 smb_tree_get_stype(const char *sharename, const char *service, 812 int32_t *stype_ret) 813 { 814 const char *any = "?????"; 815 816 if ((strcmp(service, any) == 0) || (strcasecmp(service, "IPC") == 0)) { 817 if (strcasecmp(sharename, "IPC$") == 0) { 818 *stype_ret = STYPE_IPC; 819 return (0); 820 } 821 } 822 823 if ((strcmp(service, any) == 0) || (strcasecmp(service, "A:") == 0)) { 824 if (strcasecmp(sharename, "IPC$") == 0) 825 return (-1); 826 827 *stype_ret = STYPE_DISKTREE; 828 return (0); 829 } 830 831 return (-1); 832 } 833 834 /* 835 * Obtain the tree attributes: volume name, typename and flags. 836 */ 837 static int 838 smb_tree_getattr(smb_node_t *node, smb_tree_t *tree) 839 { 840 vfs_t *vfsp = SMB_NODE_VFS(node); 841 842 ASSERT(vfsp); 843 844 if (getvfs(&vfsp->vfs_fsid) != vfsp) 845 return (ESTALE); 846 847 smb_tree_get_volname(vfsp, tree); 848 smb_tree_get_flags(vfsp, tree); 849 850 VFS_RELE(vfsp); 851 return (0); 852 } 853 854 /* 855 * Extract the volume name. 856 */ 857 static void 858 smb_tree_get_volname(vfs_t *vfsp, smb_tree_t *tree) 859 { 860 refstr_t *vfs_mntpoint; 861 const char *s; 862 char *name; 863 864 vfs_mntpoint = vfs_getmntpoint(vfsp); 865 866 s = vfs_mntpoint->rs_string; 867 s += strspn(s, "/"); 868 (void) strlcpy(tree->t_volume, s, SMB_VOLNAMELEN); 869 870 refstr_rele(vfs_mntpoint); 871 872 name = tree->t_volume; 873 (void) strsep((char **)&name, "/"); 874 } 875 876 /* 877 * Always set ACL support because the VFS will fake ACLs for file systems 878 * that don't support them. 879 * 880 * Some flags are dependent on the typename, which is also set up here. 881 * File system types are hardcoded in uts/common/os/vfs_conf.c. 882 */ 883 static void 884 smb_tree_get_flags(vfs_t *vfsp, smb_tree_t *tree) 885 { 886 uint32_t flags = SMB_TREE_SUPPORTS_ACLS; 887 char *name; 888 889 if (vfsp->vfs_flag & VFS_RDONLY) 890 flags |= SMB_TREE_READONLY; 891 892 if (vfsp->vfs_flag & VFS_XATTR) 893 flags |= SMB_TREE_STREAMS; 894 895 if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) 896 flags |= SMB_TREE_NO_ATIME; 897 898 name = vfssw[vfsp->vfs_fstype].vsw_name; 899 900 if (strcmp(name, "tmpfs") == 0) 901 flags |= SMB_TREE_NO_EXPORT; 902 903 if (strncasecmp(name, NFS, sizeof (NFS)) == 0) 904 flags |= SMB_TREE_NFS_MOUNTED; 905 906 (void) strlcpy(tree->t_typename, name, SMB_TYPENAMELEN); 907 (void) utf8_strupr((char *)tree->t_typename); 908 909 if (vfs_has_feature(vfsp, VFSFT_XVATTR)) 910 flags |= SMB_TREE_XVATTR; 911 912 if (vfs_has_feature(vfsp, VFSFT_CASEINSENSITIVE)) 913 flags |= SMB_TREE_CASEINSENSITIVE; 914 915 if (vfs_has_feature(vfsp, VFSFT_NOCASESENSITIVE)) 916 flags |= SMB_TREE_NO_CASESENSITIVE; 917 918 if (vfs_has_feature(vfsp, VFSFT_DIRENTFLAGS)) 919 flags |= SMB_TREE_DIRENTFLAGS; 920 921 if (vfs_has_feature(vfsp, VFSFT_ACLONCREATE)) 922 flags |= SMB_TREE_ACLONCREATE; 923 924 if (vfs_has_feature(vfsp, VFSFT_ACEMASKONACCESS)) 925 flags |= SMB_TREE_ACEMASKONACCESS; 926 927 DTRACE_PROBE1(smb__tree__flags, uint32_t, flags); 928 929 tree->t_flags = flags; 930 } 931 932 /* 933 * Report share access result to syslog. 934 */ 935 static void 936 smb_tree_log(smb_request_t *sr, const char *sharename, const char *fmt, ...) 937 { 938 va_list ap; 939 char buf[128]; 940 smb_user_t *user = sr->uid_user; 941 942 ASSERT(user); 943 944 if (smb_tcon_mute) 945 return; 946 947 if ((user->u_name) && (strcasecmp(sharename, "IPC$") == 0)) { 948 /* 949 * Only report normal users, i.e. ignore W2K misuse 950 * of the IPC connection by filtering out internal 951 * names such as nobody and root. 952 */ 953 if ((strcmp(user->u_name, "root") == 0) || 954 (strcmp(user->u_name, "nobody") == 0)) { 955 return; 956 } 957 } 958 959 va_start(ap, fmt); 960 (void) vsnprintf(buf, 128, fmt, ap); 961 va_end(ap); 962 963 cmn_err(CE_NOTE, "smbd[%s\\%s]: %s %s", 964 user->u_domain, user->u_name, sharename, buf); 965 } 966 967 /* 968 * smb_tree_lookup_odir 969 * 970 * Find the specified odir in the tree's list of odirs, and 971 * attempt to obtain a hold on the odir. 972 * 973 * Returns NULL if odir not found or a hold cannot be obtained. 974 */ 975 smb_odir_t * 976 smb_tree_lookup_odir(smb_tree_t *tree, uint16_t odid) 977 { 978 smb_odir_t *od; 979 smb_llist_t *od_list; 980 981 ASSERT(tree); 982 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 983 984 od_list = &tree->t_odir_list; 985 smb_llist_enter(od_list, RW_READER); 986 987 od = smb_llist_head(od_list); 988 while (od) { 989 if (od->d_odid == odid) { 990 if (!smb_odir_hold(od)) 991 od = NULL; 992 break; 993 } 994 od = smb_llist_next(od_list, od); 995 } 996 997 smb_llist_exit(od_list); 998 return (od); 999 } 1000 1001 /* 1002 * smb_tree_get_odir 1003 * 1004 * Find the next open odir in the tree's list of odirs, and obtain 1005 * a hold on it. (A hold can only be obtained on an open odir.) 1006 * If the specified odir is NULL the search starts at the beginning 1007 * of the tree's odir list, otherwise the search starts after the 1008 * specified odir. 1009 */ 1010 static smb_odir_t * 1011 smb_tree_get_odir(smb_tree_t *tree, smb_odir_t *od) 1012 { 1013 smb_llist_t *od_list; 1014 1015 ASSERT(tree); 1016 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 1017 1018 od_list = &tree->t_odir_list; 1019 smb_llist_enter(od_list, RW_READER); 1020 1021 if (od) { 1022 ASSERT(od->d_magic == SMB_ODIR_MAGIC); 1023 od = smb_llist_next(od_list, od); 1024 } else { 1025 od = smb_llist_head(od_list); 1026 } 1027 1028 while (od) { 1029 ASSERT(od->d_magic == SMB_ODIR_MAGIC); 1030 1031 if (smb_odir_hold(od)) 1032 break; 1033 od = smb_llist_next(od_list, od); 1034 } 1035 1036 smb_llist_exit(od_list); 1037 return (od); 1038 } 1039 1040 /* 1041 * smb_tree_close_odirs 1042 * 1043 * Close all open odirs in the tree's list which were opened by 1044 * the process identified by pid. 1045 * If pid is zero, close all open odirs in the tree's list. 1046 */ 1047 static void 1048 smb_tree_close_odirs(smb_tree_t *tree, uint16_t pid) 1049 { 1050 smb_odir_t *od, *next_od; 1051 1052 ASSERT(tree); 1053 ASSERT(tree->t_magic == SMB_TREE_MAGIC); 1054 1055 od = smb_tree_get_odir(tree, NULL); 1056 while (od) { 1057 ASSERT(od->d_magic == SMB_ODIR_MAGIC); 1058 ASSERT(od->d_tree == tree); 1059 1060 next_od = smb_tree_get_odir(tree, od); 1061 if ((pid == 0) || (od->d_opened_by_pid == pid)) 1062 smb_odir_close(od); 1063 smb_odir_release(od); 1064 1065 od = next_od; 1066 } 1067 } 1068