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 /* 23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27 /* 28 * This module provides the common open functionality to the various 29 * open and create SMB interface functions. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/cmn_err.h> 34 #include <sys/fcntl.h> 35 #include <sys/nbmlock.h> 36 #include <smbsrv/string.h> 37 #include <smbsrv/smb_kproto.h> 38 #include <smbsrv/smb_fsops.h> 39 #include <smbsrv/smbinfo.h> 40 41 volatile uint32_t smb_fids = 0; 42 #define SMB_UNIQ_FID() atomic_inc_32_nv(&smb_fids) 43 44 static uint32_t smb_open_subr(smb_request_t *); 45 extern uint32_t smb_is_executable(char *); 46 static void smb_delete_new_object(smb_request_t *); 47 static int smb_set_open_attributes(smb_request_t *, smb_ofile_t *); 48 static void smb_open_oplock_break(smb_request_t *, smb_node_t *); 49 static boolean_t smb_open_attr_only(smb_arg_open_t *); 50 static boolean_t smb_open_overwrite(smb_arg_open_t *); 51 52 /* 53 * smb_access_generic_to_file 54 * 55 * Search MSDN for IoCreateFile to see following mapping. 56 * 57 * GENERIC_READ STANDARD_RIGHTS_READ, FILE_READ_DATA, 58 * FILE_READ_ATTRIBUTES and FILE_READ_EA 59 * 60 * GENERIC_WRITE STANDARD_RIGHTS_WRITE, FILE_WRITE_DATA, 61 * FILE_WRITE_ATTRIBUTES, FILE_WRITE_EA, and FILE_APPEND_DATA 62 * 63 * GENERIC_EXECUTE STANDARD_RIGHTS_EXECUTE, SYNCHRONIZE, and FILE_EXECUTE. 64 * 65 * Careful, we have to emulate some Windows behavior here. 66 * When requested access == zero, you get READ_CONTROL. 67 * MacOS 10.7 depends on this. 68 */ 69 uint32_t 70 smb_access_generic_to_file(uint32_t desired_access) 71 { 72 uint32_t access = READ_CONTROL; 73 74 if (desired_access & GENERIC_ALL) 75 return (FILE_ALL_ACCESS & ~SYNCHRONIZE); 76 77 if (desired_access & GENERIC_EXECUTE) { 78 desired_access &= ~GENERIC_EXECUTE; 79 access |= (STANDARD_RIGHTS_EXECUTE | 80 SYNCHRONIZE | FILE_EXECUTE); 81 } 82 83 if (desired_access & GENERIC_WRITE) { 84 desired_access &= ~GENERIC_WRITE; 85 access |= (FILE_GENERIC_WRITE & ~SYNCHRONIZE); 86 } 87 88 if (desired_access & GENERIC_READ) { 89 desired_access &= ~GENERIC_READ; 90 access |= FILE_GENERIC_READ; 91 } 92 93 return (access | desired_access); 94 } 95 96 /* 97 * smb_omode_to_amask 98 * 99 * This function converts open modes used by Open and Open AndX 100 * commands to desired access bits used by NT Create AndX command. 101 */ 102 uint32_t 103 smb_omode_to_amask(uint32_t desired_access) 104 { 105 switch (desired_access & SMB_DA_ACCESS_MASK) { 106 case SMB_DA_ACCESS_READ: 107 return (FILE_GENERIC_READ); 108 109 case SMB_DA_ACCESS_WRITE: 110 return (FILE_GENERIC_WRITE); 111 112 case SMB_DA_ACCESS_READ_WRITE: 113 return (FILE_GENERIC_READ | FILE_GENERIC_WRITE); 114 115 case SMB_DA_ACCESS_EXECUTE: 116 return (FILE_GENERIC_EXECUTE); 117 118 default: 119 return (FILE_GENERIC_ALL); 120 } 121 } 122 123 /* 124 * smb_denymode_to_sharemode 125 * 126 * This function converts deny modes used by Open and Open AndX 127 * commands to share access bits used by NT Create AndX command. 128 */ 129 uint32_t 130 smb_denymode_to_sharemode(uint32_t desired_access, char *fname) 131 { 132 switch (desired_access & SMB_DA_SHARE_MASK) { 133 case SMB_DA_SHARE_COMPATIBILITY: 134 if (smb_is_executable(fname)) 135 return (FILE_SHARE_READ | FILE_SHARE_WRITE); 136 137 return (FILE_SHARE_ALL); 138 139 case SMB_DA_SHARE_EXCLUSIVE: 140 return (FILE_SHARE_NONE); 141 142 case SMB_DA_SHARE_DENY_WRITE: 143 return (FILE_SHARE_READ); 144 145 case SMB_DA_SHARE_DENY_READ: 146 return (FILE_SHARE_WRITE); 147 148 case SMB_DA_SHARE_DENY_NONE: 149 default: 150 return (FILE_SHARE_READ | FILE_SHARE_WRITE); 151 } 152 } 153 154 /* 155 * smb_ofun_to_crdisposition 156 * 157 * This function converts open function values used by Open and Open AndX 158 * commands to create disposition values used by NT Create AndX command. 159 */ 160 uint32_t 161 smb_ofun_to_crdisposition(uint16_t ofun) 162 { 163 static int ofun_cr_map[3][2] = 164 { 165 { -1, FILE_CREATE }, 166 { FILE_OPEN, FILE_OPEN_IF }, 167 { FILE_OVERWRITE, FILE_OVERWRITE_IF } 168 }; 169 170 int row = ofun & SMB_OFUN_OPEN_MASK; 171 int col = (ofun & SMB_OFUN_CREATE_MASK) >> 4; 172 173 if (row == 3) 174 return (FILE_MAXIMUM_DISPOSITION + 1); 175 176 return (ofun_cr_map[row][col]); 177 } 178 179 /* 180 * Retry opens to avoid spurious sharing violations, due to timing 181 * issues between closes and opens. The client that already has the 182 * file open may be in the process of closing it. 183 */ 184 uint32_t 185 smb_common_open(smb_request_t *sr) 186 { 187 smb_arg_open_t *parg; 188 uint32_t status = NT_STATUS_SUCCESS; 189 int count; 190 191 parg = kmem_alloc(sizeof (*parg), KM_SLEEP); 192 bcopy(&sr->arg.open, parg, sizeof (*parg)); 193 194 for (count = 0; count <= 4; count++) { 195 if (count != 0) 196 delay(MSEC_TO_TICK(400)); 197 198 status = smb_open_subr(sr); 199 if (status != NT_STATUS_SHARING_VIOLATION) 200 break; 201 202 bcopy(parg, &sr->arg.open, sizeof (*parg)); 203 } 204 205 if (status == NT_STATUS_SHARING_VIOLATION) { 206 smbsr_error(sr, NT_STATUS_SHARING_VIOLATION, 207 ERRDOS, ERROR_SHARING_VIOLATION); 208 } 209 210 if (status == NT_STATUS_NO_SUCH_FILE) { 211 smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, 212 ERRDOS, ERROR_FILE_NOT_FOUND); 213 } 214 215 kmem_free(parg, sizeof (*parg)); 216 return (status); 217 } 218 219 /* 220 * smb_open_subr 221 * 222 * Notes on write-through behaviour. It looks like pre-LM0.12 versions 223 * of the protocol specify the write-through mode when a file is opened, 224 * (SmbOpen, SmbOpenAndX) so the write calls (SmbWrite, SmbWriteAndClose, 225 * SmbWriteAndUnlock) don't need to contain a write-through flag. 226 * 227 * With LM0.12, the open calls (SmbCreateAndX, SmbNtTransactCreate) 228 * don't indicate which write-through mode to use. Instead the write 229 * calls (SmbWriteAndX, SmbWriteRaw) specify the mode on a per call 230 * basis. 231 * 232 * We don't care which open call was used to get us here, we just need 233 * to ensure that the write-through mode flag is copied from the open 234 * parameters to the node. We test the omode write-through flag in all 235 * write functions. 236 * 237 * This function will return NT status codes but it also raises errors, 238 * in which case it won't return to the caller. Be careful how you 239 * handle things in here. 240 * 241 * The following rules apply when processing a file open request: 242 * 243 * - Oplocks must be broken prior to share checking as the break may 244 * cause other clients to close the file, which would affect sharing 245 * checks. 246 * 247 * - Share checks must take place prior to access checks for correct 248 * Windows semantics and to prevent unnecessary NFS delegation recalls. 249 * 250 * - Oplocks must be acquired after open to ensure the correct 251 * synchronization with NFS delegation and FEM installation. 252 * 253 * DOS readonly bit rules 254 * 255 * 1. The creator of a readonly file can write to/modify the size of the file 256 * using the original create fid, even though the file will appear as readonly 257 * to all other fids and via a CIFS getattr call. 258 * The readonly bit therefore cannot be set in the filesystem until the file 259 * is closed (smb_ofile_close). It is accounted for via ofile and node flags. 260 * 261 * 2. A setinfo operation (using either an open fid or a path) to set/unset 262 * readonly will be successful regardless of whether a creator of a readonly 263 * file has an open fid (and has the special privilege mentioned in #1, 264 * above). I.e., the creator of a readonly fid holding that fid will no longer 265 * have a special privilege. 266 * 267 * 3. The DOS readonly bit affects only data and some metadata. 268 * The following metadata can be changed regardless of the readonly bit: 269 * - security descriptors 270 * - DOS attributes 271 * - timestamps 272 * 273 * In the current implementation, the file size cannot be changed (except for 274 * the exceptions in #1 and #2, above). 275 * 276 * 277 * DOS attribute rules 278 * 279 * These rules are specific to creating / opening files and directories. 280 * How the attribute value (specifically ZERO or FILE_ATTRIBUTE_NORMAL) 281 * should be interpreted may differ in other requests. 282 * 283 * - An attribute value equal to ZERO or FILE_ATTRIBUTE_NORMAL means that the 284 * file's attributes should be cleared. 285 * - If FILE_ATTRIBUTE_NORMAL is specified with any other attributes, 286 * FILE_ATTRIBUTE_NORMAL is ignored. 287 * 288 * 1. Creating a new file 289 * - The request attributes + FILE_ATTRIBUTE_ARCHIVE are applied to the file. 290 * 291 * 2. Creating a new directory 292 * - The request attributes + FILE_ATTRIBUTE_DIRECTORY are applied to the file. 293 * - FILE_ATTRIBUTE_ARCHIVE does not get set. 294 * 295 * 3. Overwriting an existing file 296 * - the request attributes are used as search attributes. If the existing 297 * file does not meet the search criteria access is denied. 298 * - otherwise, applies attributes + FILE_ATTRIBUTE_ARCHIVE. 299 * 300 * 4. Opening an existing file or directory 301 * The request attributes are ignored. 302 */ 303 static uint32_t 304 smb_open_subr(smb_request_t *sr) 305 { 306 boolean_t created = B_FALSE; 307 boolean_t last_comp_found = B_FALSE; 308 smb_node_t *node = NULL; 309 smb_node_t *dnode = NULL; 310 smb_node_t *cur_node = NULL; 311 smb_arg_open_t *op = &sr->sr_open; 312 int rc; 313 smb_ofile_t *of; 314 smb_attr_t new_attr; 315 int max_requested = 0; 316 uint32_t max_allowed; 317 uint32_t status = NT_STATUS_SUCCESS; 318 int is_dir; 319 smb_error_t err; 320 boolean_t is_stream = B_FALSE; 321 int lookup_flags = SMB_FOLLOW_LINKS; 322 uint32_t uniq_fid; 323 smb_pathname_t *pn = &op->fqi.fq_path; 324 smb_server_t *sv = sr->sr_server; 325 326 is_dir = (op->create_options & FILE_DIRECTORY_FILE) ? 1 : 0; 327 328 /* 329 * If the object being created or opened is a directory 330 * the Disposition parameter must be one of FILE_CREATE, 331 * FILE_OPEN, or FILE_OPEN_IF 332 */ 333 if (is_dir) { 334 if ((op->create_disposition != FILE_CREATE) && 335 (op->create_disposition != FILE_OPEN_IF) && 336 (op->create_disposition != FILE_OPEN)) { 337 smbsr_error(sr, NT_STATUS_INVALID_PARAMETER, 338 ERRDOS, ERROR_INVALID_ACCESS); 339 return (NT_STATUS_INVALID_PARAMETER); 340 } 341 } 342 343 if (op->desired_access & MAXIMUM_ALLOWED) { 344 max_requested = 1; 345 op->desired_access &= ~MAXIMUM_ALLOWED; 346 } 347 op->desired_access = smb_access_generic_to_file(op->desired_access); 348 349 if (sr->session->s_file_cnt >= SMB_SESSION_OFILE_MAX) { 350 ASSERT(sr->uid_user); 351 cmn_err(CE_NOTE, "smbsrv[%s\\%s]: TOO_MANY_OPENED_FILES", 352 sr->uid_user->u_domain, sr->uid_user->u_name); 353 354 smbsr_error(sr, NT_STATUS_TOO_MANY_OPENED_FILES, 355 ERRDOS, ERROR_TOO_MANY_OPEN_FILES); 356 return (NT_STATUS_TOO_MANY_OPENED_FILES); 357 } 358 359 /* This must be NULL at this point */ 360 sr->fid_ofile = NULL; 361 362 op->devstate = 0; 363 364 switch (sr->tid_tree->t_res_type & STYPE_MASK) { 365 case STYPE_DISKTREE: 366 case STYPE_PRINTQ: 367 break; 368 369 case STYPE_IPC: 370 371 if ((rc = smb_threshold_enter(&sv->sv_opipe_ct)) != 0) { 372 status = RPC_NT_SERVER_TOO_BUSY; 373 smbsr_error(sr, status, 0, 0); 374 return (status); 375 } 376 377 /* 378 * No further processing for IPC, we need to either 379 * raise an exception or return success here. 380 */ 381 if ((status = smb_opipe_open(sr)) != NT_STATUS_SUCCESS) 382 smbsr_error(sr, status, 0, 0); 383 384 smb_threshold_exit(&sv->sv_opipe_ct); 385 return (status); 386 387 default: 388 smbsr_error(sr, NT_STATUS_BAD_DEVICE_TYPE, 389 ERRDOS, ERROR_BAD_DEV_TYPE); 390 return (NT_STATUS_BAD_DEVICE_TYPE); 391 } 392 393 smb_pathname_init(sr, pn, pn->pn_path); 394 if (!smb_pathname_validate(sr, pn)) 395 return (sr->smb_error.status); 396 397 if (strlen(pn->pn_path) >= MAXPATHLEN) { 398 smbsr_error(sr, 0, ERRSRV, ERRfilespecs); 399 return (NT_STATUS_NAME_TOO_LONG); 400 } 401 402 if (is_dir) { 403 if (!smb_validate_dirname(sr, pn)) 404 return (sr->smb_error.status); 405 } else { 406 if (!smb_validate_object_name(sr, pn)) 407 return (sr->smb_error.status); 408 } 409 410 cur_node = op->fqi.fq_dnode ? 411 op->fqi.fq_dnode : sr->tid_tree->t_snode; 412 413 /* 414 * if no path or filename are specified the stream should be 415 * created on cur_node 416 */ 417 if (!is_dir && !pn->pn_pname && !pn->pn_fname && pn->pn_sname) { 418 /* 419 * Can't currently handle a stream on the tree root. 420 * If a stream is being opened return "not found", otherwise 421 * return "access denied". 422 */ 423 if (cur_node == sr->tid_tree->t_snode) { 424 if (op->create_disposition == FILE_OPEN) { 425 smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, 426 ERRDOS, ERROR_FILE_NOT_FOUND); 427 return (NT_STATUS_OBJECT_NAME_NOT_FOUND); 428 } 429 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, 430 ERROR_ACCESS_DENIED); 431 return (NT_STATUS_ACCESS_DENIED); 432 } 433 434 (void) snprintf(op->fqi.fq_last_comp, 435 sizeof (op->fqi.fq_last_comp), 436 "%s%s", cur_node->od_name, pn->pn_sname); 437 438 op->fqi.fq_dnode = cur_node->n_dnode; 439 smb_node_ref(op->fqi.fq_dnode); 440 } else { 441 rc = smb_pathname_reduce(sr, sr->user_cr, pn->pn_path, 442 sr->tid_tree->t_snode, cur_node, &op->fqi.fq_dnode, 443 op->fqi.fq_last_comp); 444 if (rc != 0) { 445 smbsr_errno(sr, rc); 446 return (sr->smb_error.status); 447 } 448 } 449 450 /* 451 * If the access mask has only DELETE set (ignore 452 * FILE_READ_ATTRIBUTES), then assume that this 453 * is a request to delete the link (if a link) 454 * and do not follow links. Otherwise, follow 455 * the link to the target. 456 */ 457 if ((op->desired_access & ~FILE_READ_ATTRIBUTES) == DELETE) 458 lookup_flags &= ~SMB_FOLLOW_LINKS; 459 460 rc = smb_fsop_lookup_name(sr, zone_kcred(), lookup_flags, 461 sr->tid_tree->t_snode, op->fqi.fq_dnode, op->fqi.fq_last_comp, 462 &op->fqi.fq_fnode); 463 464 if (rc == 0) { 465 last_comp_found = B_TRUE; 466 /* 467 * Need the DOS attributes below, where we 468 * check the search attributes (sattr). 469 */ 470 op->fqi.fq_fattr.sa_mask = SMB_AT_DOSATTR; 471 rc = smb_node_getattr(sr, op->fqi.fq_fnode, zone_kcred(), 472 NULL, &op->fqi.fq_fattr); 473 if (rc != 0) { 474 smb_node_release(op->fqi.fq_fnode); 475 smb_node_release(op->fqi.fq_dnode); 476 smbsr_error(sr, NT_STATUS_INTERNAL_ERROR, 477 ERRDOS, ERROR_INTERNAL_ERROR); 478 return (sr->smb_error.status); 479 } 480 } else if (rc == ENOENT) { 481 last_comp_found = B_FALSE; 482 op->fqi.fq_fnode = NULL; 483 rc = 0; 484 } else { 485 smb_node_release(op->fqi.fq_dnode); 486 smbsr_errno(sr, rc); 487 return (sr->smb_error.status); 488 } 489 490 491 /* 492 * The uniq_fid is a CIFS-server-wide unique identifier for an ofile 493 * which is used to uniquely identify open instances for the 494 * VFS share reservation and POSIX locks. 495 */ 496 497 uniq_fid = SMB_UNIQ_FID(); 498 499 if (last_comp_found) { 500 501 node = op->fqi.fq_fnode; 502 dnode = op->fqi.fq_dnode; 503 504 if (!smb_node_is_file(node) && !smb_node_is_dir(node) && 505 !smb_node_is_symlink(node)) { 506 smb_node_release(node); 507 smb_node_release(dnode); 508 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, 509 ERRnoaccess); 510 return (NT_STATUS_ACCESS_DENIED); 511 } 512 513 /* 514 * Reject this request if either: 515 * - the target IS a directory and the client requires that 516 * it must NOT be (required by Lotus Notes) 517 * - the target is NOT a directory and client requires that 518 * it MUST be. 519 */ 520 if (smb_node_is_dir(node)) { 521 if (op->create_options & FILE_NON_DIRECTORY_FILE) { 522 smb_node_release(node); 523 smb_node_release(dnode); 524 smbsr_error(sr, NT_STATUS_FILE_IS_A_DIRECTORY, 525 ERRDOS, ERROR_ACCESS_DENIED); 526 return (NT_STATUS_FILE_IS_A_DIRECTORY); 527 } 528 } else { 529 if ((op->create_options & FILE_DIRECTORY_FILE) || 530 (op->nt_flags & NT_CREATE_FLAG_OPEN_TARGET_DIR)) { 531 smb_node_release(node); 532 smb_node_release(dnode); 533 smbsr_error(sr, NT_STATUS_NOT_A_DIRECTORY, 534 ERRDOS, ERROR_DIRECTORY); 535 return (NT_STATUS_NOT_A_DIRECTORY); 536 } 537 } 538 539 /* 540 * No more open should be accepted when "Delete on close" 541 * flag is set. 542 */ 543 if (node->flags & NODE_FLAGS_DELETE_ON_CLOSE) { 544 smb_node_release(node); 545 smb_node_release(dnode); 546 smbsr_error(sr, NT_STATUS_DELETE_PENDING, 547 ERRDOS, ERROR_ACCESS_DENIED); 548 return (NT_STATUS_DELETE_PENDING); 549 } 550 551 /* 552 * Specified file already exists so the operation should fail. 553 */ 554 if (op->create_disposition == FILE_CREATE) { 555 smb_node_release(node); 556 smb_node_release(dnode); 557 smbsr_error(sr, NT_STATUS_OBJECT_NAME_COLLISION, 558 ERRDOS, ERROR_FILE_EXISTS); 559 return (NT_STATUS_OBJECT_NAME_COLLISION); 560 } 561 562 /* 563 * Windows seems to check read-only access before file 564 * sharing check. 565 * 566 * Check to see if the file is currently readonly (irrespective 567 * of whether this open will make it readonly). 568 */ 569 if (SMB_PATHFILE_IS_READONLY(sr, node)) { 570 /* Files data only */ 571 if (!smb_node_is_dir(node)) { 572 if (op->desired_access & (FILE_WRITE_DATA | 573 FILE_APPEND_DATA)) { 574 smb_node_release(node); 575 smb_node_release(dnode); 576 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, 577 ERRDOS, ERRnoaccess); 578 return (NT_STATUS_ACCESS_DENIED); 579 } 580 } 581 } 582 583 if ((op->create_disposition == FILE_SUPERSEDE) || 584 (op->create_disposition == FILE_OVERWRITE_IF) || 585 (op->create_disposition == FILE_OVERWRITE)) { 586 587 if (!smb_sattr_check(op->fqi.fq_fattr.sa_dosattr, 588 op->dattr)) { 589 smb_node_release(node); 590 smb_node_release(dnode); 591 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, 592 ERRDOS, ERRnoaccess); 593 return (NT_STATUS_ACCESS_DENIED); 594 } 595 596 if (smb_node_is_dir(node)) { 597 smb_node_release(node); 598 smb_node_release(dnode); 599 return (NT_STATUS_ACCESS_DENIED); 600 } 601 } 602 603 /* MS-FSA 2.1.5.1.2 */ 604 if (op->create_disposition == FILE_SUPERSEDE) 605 op->desired_access |= DELETE; 606 if ((op->create_disposition == FILE_OVERWRITE_IF) || 607 (op->create_disposition == FILE_OVERWRITE)) 608 op->desired_access |= FILE_WRITE_DATA; 609 610 status = smb_fsop_access(sr, sr->user_cr, node, 611 op->desired_access); 612 if (status != NT_STATUS_SUCCESS) { 613 smb_node_release(node); 614 smb_node_release(dnode); 615 616 if (status == NT_STATUS_PRIVILEGE_NOT_HELD) { 617 smbsr_error(sr, status, 618 ERRDOS, ERROR_PRIVILEGE_NOT_HELD); 619 return (status); 620 } else { 621 smbsr_error(sr, NT_STATUS_ACCESS_DENIED, 622 ERRDOS, ERROR_ACCESS_DENIED); 623 return (NT_STATUS_ACCESS_DENIED); 624 } 625 } 626 627 if (max_requested) { 628 smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); 629 op->desired_access |= max_allowed; 630 } 631 632 /* 633 * Oplock break is done prior to sharing checks as the break 634 * may cause other clients to close the file which would 635 * affect the sharing checks. This may block, so set the 636 * file opening count before oplock stuff. 637 */ 638 smb_node_inc_opening_count(node); 639 smb_open_oplock_break(sr, node); 640 641 smb_node_wrlock(node); 642 643 /* 644 * Check for sharing violations 645 */ 646 status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, 647 op->desired_access, op->share_access); 648 if (status == NT_STATUS_SHARING_VIOLATION) { 649 smb_node_unlock(node); 650 smb_node_dec_opening_count(node); 651 smb_node_release(node); 652 smb_node_release(dnode); 653 return (status); 654 } 655 656 /* 657 * Go ahead with modifications as necessary. 658 */ 659 switch (op->create_disposition) { 660 case FILE_SUPERSEDE: 661 case FILE_OVERWRITE_IF: 662 case FILE_OVERWRITE: 663 op->dattr |= FILE_ATTRIBUTE_ARCHIVE; 664 /* Don't apply readonly bit until smb_ofile_close */ 665 if (op->dattr & FILE_ATTRIBUTE_READONLY) { 666 op->created_readonly = B_TRUE; 667 op->dattr &= ~FILE_ATTRIBUTE_READONLY; 668 } 669 670 bzero(&new_attr, sizeof (new_attr)); 671 new_attr.sa_dosattr = op->dattr; 672 new_attr.sa_vattr.va_size = op->dsize; 673 new_attr.sa_mask = SMB_AT_DOSATTR | SMB_AT_SIZE; 674 rc = smb_fsop_setattr(sr, sr->user_cr, node, &new_attr); 675 if (rc != 0) { 676 smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); 677 smb_node_unlock(node); 678 smb_node_dec_opening_count(node); 679 smb_node_release(node); 680 smb_node_release(dnode); 681 smbsr_errno(sr, rc); 682 return (sr->smb_error.status); 683 } 684 685 /* 686 * If file is being replaced, remove existing streams 687 */ 688 if (SMB_IS_STREAM(node) == 0) { 689 rc = smb_fsop_remove_streams(sr, sr->user_cr, 690 node); 691 if (rc != 0) { 692 smb_fsop_unshrlock(sr->user_cr, node, 693 uniq_fid); 694 smb_node_unlock(node); 695 smb_node_dec_opening_count(node); 696 smb_node_release(node); 697 smb_node_release(dnode); 698 return (sr->smb_error.status); 699 } 700 } 701 702 op->action_taken = SMB_OACT_TRUNCATED; 703 break; 704 705 default: 706 /* 707 * FILE_OPEN or FILE_OPEN_IF. 708 */ 709 op->action_taken = SMB_OACT_OPENED; 710 break; 711 } 712 } else { 713 /* Last component was not found. */ 714 dnode = op->fqi.fq_dnode; 715 716 if (is_dir == 0) 717 is_stream = smb_is_stream_name(pn->pn_path); 718 719 if ((op->create_disposition == FILE_OPEN) || 720 (op->create_disposition == FILE_OVERWRITE)) { 721 smb_node_release(dnode); 722 smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, 723 ERRDOS, ERROR_FILE_NOT_FOUND); 724 return (NT_STATUS_OBJECT_NAME_NOT_FOUND); 725 } 726 727 if (pn->pn_fname && smb_is_invalid_filename(pn->pn_fname)) { 728 smb_node_release(dnode); 729 smbsr_error(sr, NT_STATUS_OBJECT_NAME_INVALID, 730 ERRDOS, ERROR_INVALID_NAME); 731 return (NT_STATUS_OBJECT_NAME_INVALID); 732 } 733 734 /* 735 * lock the parent dir node in case another create 736 * request to the same parent directory comes in. 737 */ 738 smb_node_wrlock(dnode); 739 740 /* Don't apply readonly bit until smb_ofile_close */ 741 if (op->dattr & FILE_ATTRIBUTE_READONLY) { 742 op->dattr &= ~FILE_ATTRIBUTE_READONLY; 743 op->created_readonly = B_TRUE; 744 } 745 746 bzero(&new_attr, sizeof (new_attr)); 747 if ((op->crtime.tv_sec != 0) && 748 (op->crtime.tv_sec != UINT_MAX)) { 749 750 new_attr.sa_mask |= SMB_AT_CRTIME; 751 new_attr.sa_crtime = op->crtime; 752 } 753 754 if (is_dir == 0) { 755 op->dattr |= FILE_ATTRIBUTE_ARCHIVE; 756 new_attr.sa_dosattr = op->dattr; 757 new_attr.sa_vattr.va_type = VREG; 758 new_attr.sa_vattr.va_mode = is_stream ? S_IRUSR : 759 S_IRUSR | S_IRGRP | S_IROTH | 760 S_IWUSR | S_IWGRP | S_IWOTH; 761 new_attr.sa_mask |= 762 SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; 763 764 if (op->dsize) { 765 new_attr.sa_vattr.va_size = op->dsize; 766 new_attr.sa_mask |= SMB_AT_SIZE; 767 } 768 769 rc = smb_fsop_create(sr, sr->user_cr, dnode, 770 op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); 771 772 if (rc != 0) { 773 smb_node_unlock(dnode); 774 smb_node_release(dnode); 775 smbsr_errno(sr, rc); 776 return (sr->smb_error.status); 777 } 778 779 node = op->fqi.fq_fnode; 780 smb_node_inc_opening_count(node); 781 smb_node_wrlock(node); 782 783 status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, 784 op->desired_access, op->share_access); 785 786 if (status == NT_STATUS_SHARING_VIOLATION) { 787 smb_node_unlock(node); 788 smb_node_dec_opening_count(node); 789 smb_delete_new_object(sr); 790 smb_node_release(node); 791 smb_node_unlock(dnode); 792 smb_node_release(dnode); 793 return (status); 794 } 795 } else { 796 op->dattr |= FILE_ATTRIBUTE_DIRECTORY; 797 new_attr.sa_dosattr = op->dattr; 798 new_attr.sa_vattr.va_type = VDIR; 799 new_attr.sa_vattr.va_mode = 0777; 800 new_attr.sa_mask |= 801 SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; 802 803 rc = smb_fsop_mkdir(sr, sr->user_cr, dnode, 804 op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); 805 if (rc != 0) { 806 smb_node_unlock(dnode); 807 smb_node_release(dnode); 808 smbsr_errno(sr, rc); 809 return (sr->smb_error.status); 810 } 811 812 node = op->fqi.fq_fnode; 813 smb_node_inc_opening_count(node); 814 smb_node_wrlock(node); 815 } 816 817 created = B_TRUE; 818 op->action_taken = SMB_OACT_CREATED; 819 820 if (max_requested) { 821 smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); 822 op->desired_access |= max_allowed; 823 } 824 } 825 826 status = NT_STATUS_SUCCESS; 827 828 of = smb_ofile_open(sr, node, sr->smb_pid, op, SMB_FTYPE_DISK, uniq_fid, 829 &err); 830 if (of == NULL) { 831 smbsr_error(sr, err.status, err.errcls, err.errcode); 832 status = err.status; 833 } 834 835 if (status == NT_STATUS_SUCCESS) { 836 if (!smb_tree_is_connected(sr->tid_tree)) { 837 smbsr_error(sr, 0, ERRSRV, ERRinvnid); 838 status = NT_STATUS_UNSUCCESSFUL; 839 } 840 } 841 842 /* 843 * This MUST be done after ofile creation, so that explicitly 844 * set timestamps can be remembered on the ofile, and the 845 * readonly flag will be stored "pending" on the node. 846 */ 847 if (status == NT_STATUS_SUCCESS) { 848 if ((rc = smb_set_open_attributes(sr, of)) != 0) { 849 smbsr_errno(sr, rc); 850 status = sr->smb_error.status; 851 } 852 } 853 854 if (status == NT_STATUS_SUCCESS) { 855 /* 856 * We've already done access checks above, 857 * and want this call to succeed even when 858 * !(desired_access & FILE_READ_ATTRIBUTES), 859 * so pass kcred here. 860 */ 861 op->fqi.fq_fattr.sa_mask = SMB_AT_ALL; 862 rc = smb_node_getattr(sr, node, zone_kcred(), of, 863 &op->fqi.fq_fattr); 864 if (rc != 0) { 865 smbsr_error(sr, NT_STATUS_INTERNAL_ERROR, 866 ERRDOS, ERROR_INTERNAL_ERROR); 867 status = NT_STATUS_INTERNAL_ERROR; 868 } 869 } 870 871 /* 872 * smb_fsop_unshrlock is a no-op if node is a directory 873 * smb_fsop_unshrlock is done in smb_ofile_close 874 */ 875 if (status != NT_STATUS_SUCCESS) { 876 if (of == NULL) { 877 smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); 878 } else { 879 smb_ofile_close(of, 0); 880 smb_ofile_release(of); 881 } 882 if (created) 883 smb_delete_new_object(sr); 884 smb_node_unlock(node); 885 smb_node_dec_opening_count(node); 886 smb_node_release(node); 887 if (created) 888 smb_node_unlock(dnode); 889 smb_node_release(dnode); 890 return (status); 891 } 892 893 /* 894 * Propagate the write-through mode from the open params 895 * to the node: see the notes in the function header. 896 */ 897 if (sr->sr_cfg->skc_sync_enable || 898 (op->create_options & FILE_WRITE_THROUGH)) 899 node->flags |= NODE_FLAGS_WRITE_THROUGH; 900 901 /* 902 * Set up the fileid and dosattr in open_param for response 903 */ 904 op->fileid = op->fqi.fq_fattr.sa_vattr.va_nodeid; 905 op->dattr = op->fqi.fq_fattr.sa_dosattr; 906 907 /* 908 * Set up the file type in open_param for the response 909 */ 910 op->ftype = SMB_FTYPE_DISK; 911 sr->smb_fid = of->f_fid; 912 sr->fid_ofile = of; 913 914 if (smb_node_is_file(node)) { 915 smb_oplock_acquire(sr, node, of); 916 op->dsize = op->fqi.fq_fattr.sa_vattr.va_size; 917 } else { 918 /* directory or symlink */ 919 op->op_oplock_level = SMB_OPLOCK_NONE; 920 op->dsize = 0; 921 } 922 923 smb_node_dec_opening_count(node); 924 925 smb_node_unlock(node); 926 if (created) 927 smb_node_unlock(dnode); 928 929 smb_node_release(node); 930 smb_node_release(dnode); 931 932 return (NT_STATUS_SUCCESS); 933 } 934 935 /* 936 * smb_open_oplock_break 937 * 938 * If the node has an ofile opened with share access none, 939 * (smb_node_share_check = FALSE) only break BATCH oplock. 940 * Otherwise: 941 * If overwriting, break to SMB_OPLOCK_NONE, else 942 * If opening for anything other than attribute access, 943 * break oplock to LEVEL_II. 944 */ 945 static void 946 smb_open_oplock_break(smb_request_t *sr, smb_node_t *node) 947 { 948 smb_arg_open_t *op = &sr->sr_open; 949 uint32_t flags = 0; 950 951 if (!smb_node_share_check(node)) 952 flags |= SMB_OPLOCK_BREAK_BATCH; 953 954 if (smb_open_overwrite(op)) { 955 flags |= SMB_OPLOCK_BREAK_TO_NONE; 956 (void) smb_oplock_break(sr, node, flags); 957 } else if (!smb_open_attr_only(op)) { 958 flags |= SMB_OPLOCK_BREAK_TO_LEVEL_II; 959 (void) smb_oplock_break(sr, node, flags); 960 } 961 } 962 963 /* 964 * smb_open_attr_only 965 * 966 * Determine if file is being opened for attribute access only. 967 * This is used to determine whether it is necessary to break 968 * existing oplocks on the file. 969 */ 970 static boolean_t 971 smb_open_attr_only(smb_arg_open_t *op) 972 { 973 if (((op->desired_access & ~(FILE_READ_ATTRIBUTES | 974 FILE_WRITE_ATTRIBUTES | SYNCHRONIZE | READ_CONTROL)) == 0) && 975 (op->create_disposition != FILE_SUPERSEDE) && 976 (op->create_disposition != FILE_OVERWRITE)) { 977 return (B_TRUE); 978 } 979 return (B_FALSE); 980 } 981 982 static boolean_t 983 smb_open_overwrite(smb_arg_open_t *op) 984 { 985 if ((op->create_disposition == FILE_SUPERSEDE) || 986 (op->create_disposition == FILE_OVERWRITE_IF) || 987 (op->create_disposition == FILE_OVERWRITE)) { 988 return (B_TRUE); 989 } 990 return (B_FALSE); 991 } 992 993 /* 994 * smb_set_open_attributes 995 * 996 * Last write time: 997 * - If the last_write time specified in the open params is not 0 or -1, 998 * use it as file's mtime. This will be considered an explicitly set 999 * timestamps, not reset by subsequent writes. 1000 * 1001 * DOS attributes 1002 * - If we created_readonly, we now store the real DOS attributes 1003 * (including the readonly bit) so subsequent opens will see it. 1004 * 1005 * Both are stored "pending" rather than in the file system. 1006 * 1007 * Returns: errno 1008 */ 1009 static int 1010 smb_set_open_attributes(smb_request_t *sr, smb_ofile_t *of) 1011 { 1012 smb_attr_t attr; 1013 smb_arg_open_t *op = &sr->sr_open; 1014 smb_node_t *node = of->f_node; 1015 int rc = 0; 1016 1017 bzero(&attr, sizeof (smb_attr_t)); 1018 1019 if (op->created_readonly) { 1020 attr.sa_dosattr = op->dattr | FILE_ATTRIBUTE_READONLY; 1021 attr.sa_mask |= SMB_AT_DOSATTR; 1022 } 1023 1024 if ((op->mtime.tv_sec != 0) && (op->mtime.tv_sec != UINT_MAX)) { 1025 attr.sa_vattr.va_mtime = op->mtime; 1026 attr.sa_mask |= SMB_AT_MTIME; 1027 } 1028 1029 /* 1030 * Used to have code here to set mtime, ctime, atime 1031 * when the open op->create_disposition is any of: 1032 * FILE_SUPERSEDE, FILE_OVERWRITE_IF, FILE_OVERWRITE. 1033 * We know that in those cases we will have set the 1034 * file size, in which case the file system will 1035 * update those times, so we don't have to. 1036 * 1037 * However, keep track of the fact that we modified 1038 * the file via this handle, so we can do the evil, 1039 * gratuitious mtime update on close that Windows 1040 * clients appear to expect. 1041 */ 1042 if (op->action_taken == SMB_OACT_TRUNCATED) 1043 of->f_written = B_TRUE; 1044 1045 if (attr.sa_mask != 0) 1046 rc = smb_node_setattr(sr, node, of->f_cr, of, &attr); 1047 1048 return (rc); 1049 } 1050 1051 /* 1052 * This function is used to delete a newly created object (file or 1053 * directory) if an error occurs after creation of the object. 1054 */ 1055 static void 1056 smb_delete_new_object(smb_request_t *sr) 1057 { 1058 smb_arg_open_t *op = &sr->sr_open; 1059 smb_fqi_t *fqi = &(op->fqi); 1060 uint32_t flags = 0; 1061 1062 if (SMB_TREE_IS_CASEINSENSITIVE(sr)) 1063 flags |= SMB_IGNORE_CASE; 1064 if (SMB_TREE_SUPPORTS_CATIA(sr)) 1065 flags |= SMB_CATIA; 1066 1067 if (op->create_options & FILE_DIRECTORY_FILE) 1068 (void) smb_fsop_rmdir(sr, sr->user_cr, fqi->fq_dnode, 1069 fqi->fq_last_comp, flags); 1070 else 1071 (void) smb_fsop_remove(sr, sr->user_cr, fqi->fq_dnode, 1072 fqi->fq_last_comp, flags); 1073 } 1074