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 2017 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 static 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 static uint32_t 66 smb_access_generic_to_file(uint32_t desired_access) 67 { 68 uint32_t access = 0; 69 70 if (desired_access & GENERIC_ALL) 71 return (FILE_ALL_ACCESS & ~SYNCHRONIZE); 72 73 if (desired_access & GENERIC_EXECUTE) { 74 desired_access &= ~GENERIC_EXECUTE; 75 access |= (STANDARD_RIGHTS_EXECUTE | 76 SYNCHRONIZE | FILE_EXECUTE); 77 } 78 79 if (desired_access & GENERIC_WRITE) { 80 desired_access &= ~GENERIC_WRITE; 81 access |= (FILE_GENERIC_WRITE & ~SYNCHRONIZE); 82 } 83 84 if (desired_access & GENERIC_READ) { 85 desired_access &= ~GENERIC_READ; 86 access |= FILE_GENERIC_READ; 87 } 88 89 return (access | desired_access); 90 } 91 92 /* 93 * smb_omode_to_amask 94 * 95 * This function converts open modes used by Open and Open AndX 96 * commands to desired access bits used by NT Create AndX command. 97 */ 98 uint32_t 99 smb_omode_to_amask(uint32_t desired_access) 100 { 101 switch (desired_access & SMB_DA_ACCESS_MASK) { 102 case SMB_DA_ACCESS_READ: 103 return (FILE_GENERIC_READ); 104 105 case SMB_DA_ACCESS_WRITE: 106 return (FILE_GENERIC_WRITE); 107 108 case SMB_DA_ACCESS_READ_WRITE: 109 return (FILE_GENERIC_READ | FILE_GENERIC_WRITE); 110 111 case SMB_DA_ACCESS_EXECUTE: 112 return (FILE_GENERIC_READ | FILE_GENERIC_EXECUTE); 113 114 default: 115 return (FILE_GENERIC_ALL); 116 } 117 } 118 119 /* 120 * smb_denymode_to_sharemode 121 * 122 * This function converts deny modes used by Open and Open AndX 123 * commands to share access bits used by NT Create AndX command. 124 */ 125 uint32_t 126 smb_denymode_to_sharemode(uint32_t desired_access, char *fname) 127 { 128 switch (desired_access & SMB_DA_SHARE_MASK) { 129 case SMB_DA_SHARE_COMPATIBILITY: 130 if (smb_is_executable(fname)) 131 return (FILE_SHARE_READ | FILE_SHARE_WRITE); 132 133 return (FILE_SHARE_ALL); 134 135 case SMB_DA_SHARE_EXCLUSIVE: 136 return (FILE_SHARE_NONE); 137 138 case SMB_DA_SHARE_DENY_WRITE: 139 return (FILE_SHARE_READ); 140 141 case SMB_DA_SHARE_DENY_READ: 142 return (FILE_SHARE_WRITE); 143 144 case SMB_DA_SHARE_DENY_NONE: 145 default: 146 return (FILE_SHARE_READ | FILE_SHARE_WRITE); 147 } 148 } 149 150 /* 151 * smb_ofun_to_crdisposition 152 * 153 * This function converts open function values used by Open and Open AndX 154 * commands to create disposition values used by NT Create AndX command. 155 */ 156 uint32_t 157 smb_ofun_to_crdisposition(uint16_t ofun) 158 { 159 static int ofun_cr_map[3][2] = 160 { 161 { -1, FILE_CREATE }, 162 { FILE_OPEN, FILE_OPEN_IF }, 163 { FILE_OVERWRITE, FILE_OVERWRITE_IF } 164 }; 165 166 int row = ofun & SMB_OFUN_OPEN_MASK; 167 int col = (ofun & SMB_OFUN_CREATE_MASK) >> 4; 168 169 if (row == 3) 170 return (FILE_MAXIMUM_DISPOSITION + 1); 171 172 return (ofun_cr_map[row][col]); 173 } 174 175 /* 176 * Retry opens to avoid spurious sharing violations, due to timing 177 * issues between closes and opens. The client that already has the 178 * file open may be in the process of closing it. 179 */ 180 uint32_t 181 smb_common_open(smb_request_t *sr) 182 { 183 smb_arg_open_t *parg; 184 uint32_t status = NT_STATUS_SUCCESS; 185 int count; 186 187 parg = kmem_alloc(sizeof (*parg), KM_SLEEP); 188 bcopy(&sr->arg.open, parg, sizeof (*parg)); 189 190 for (count = 0; count <= 4; count++) { 191 if (count != 0) 192 delay(MSEC_TO_TICK(400)); 193 194 status = smb_open_subr(sr); 195 if (status != NT_STATUS_SHARING_VIOLATION) 196 break; 197 198 bcopy(parg, &sr->arg.open, sizeof (*parg)); 199 } 200 201 if (status == NT_STATUS_NO_SUCH_FILE) 202 status = NT_STATUS_OBJECT_NAME_NOT_FOUND; 203 204 kmem_free(parg, sizeof (*parg)); 205 return (status); 206 } 207 208 /* 209 * smb_open_subr 210 * 211 * Notes on write-through behaviour. It looks like pre-LM0.12 versions 212 * of the protocol specify the write-through mode when a file is opened, 213 * (SmbOpen, SmbOpenAndX) so the write calls (SmbWrite, SmbWriteAndClose, 214 * SmbWriteAndUnlock) don't need to contain a write-through flag. 215 * 216 * With LM0.12, the open calls (SmbCreateAndX, SmbNtTransactCreate) 217 * don't indicate which write-through mode to use. Instead the write 218 * calls (SmbWriteAndX, SmbWriteRaw) specify the mode on a per call 219 * basis. 220 * 221 * We don't care which open call was used to get us here, we just need 222 * to ensure that the write-through mode flag is copied from the open 223 * parameters to the node. We test the omode write-through flag in all 224 * write functions. 225 * 226 * This function returns NT status codes. 227 * 228 * The following rules apply when processing a file open request: 229 * 230 * - Oplocks must be broken prior to share checking as the break may 231 * cause other clients to close the file, which would affect sharing 232 * checks. 233 * 234 * - Share checks must take place prior to access checks for correct 235 * Windows semantics and to prevent unnecessary NFS delegation recalls. 236 * 237 * - Oplocks must be acquired after open to ensure the correct 238 * synchronization with NFS delegation and FEM installation. 239 * 240 * DOS readonly bit rules 241 * 242 * 1. The creator of a readonly file can write to/modify the size of the file 243 * using the original create fid, even though the file will appear as readonly 244 * to all other fids and via a CIFS getattr call. 245 * The readonly bit therefore cannot be set in the filesystem until the file 246 * is closed (smb_ofile_close). It is accounted for via ofile and node flags. 247 * 248 * 2. A setinfo operation (using either an open fid or a path) to set/unset 249 * readonly will be successful regardless of whether a creator of a readonly 250 * file has an open fid (and has the special privilege mentioned in #1, 251 * above). I.e., the creator of a readonly fid holding that fid will no longer 252 * have a special privilege. 253 * 254 * 3. The DOS readonly bit affects only data and some metadata. 255 * The following metadata can be changed regardless of the readonly bit: 256 * - security descriptors 257 * - DOS attributes 258 * - timestamps 259 * 260 * In the current implementation, the file size cannot be changed (except for 261 * the exceptions in #1 and #2, above). 262 * 263 * 264 * DOS attribute rules 265 * 266 * These rules are specific to creating / opening files and directories. 267 * How the attribute value (specifically ZERO or FILE_ATTRIBUTE_NORMAL) 268 * should be interpreted may differ in other requests. 269 * 270 * - An attribute value equal to ZERO or FILE_ATTRIBUTE_NORMAL means that the 271 * file's attributes should be cleared. 272 * - If FILE_ATTRIBUTE_NORMAL is specified with any other attributes, 273 * FILE_ATTRIBUTE_NORMAL is ignored. 274 * 275 * 1. Creating a new file 276 * - The request attributes + FILE_ATTRIBUTE_ARCHIVE are applied to the file. 277 * 278 * 2. Creating a new directory 279 * - The request attributes + FILE_ATTRIBUTE_DIRECTORY are applied to the file. 280 * - FILE_ATTRIBUTE_ARCHIVE does not get set. 281 * 282 * 3. Overwriting an existing file 283 * - the request attributes are used as search attributes. If the existing 284 * file does not meet the search criteria access is denied. 285 * - otherwise, applies attributes + FILE_ATTRIBUTE_ARCHIVE. 286 * 287 * 4. Opening an existing file or directory 288 * The request attributes are ignored. 289 */ 290 static uint32_t 291 smb_open_subr(smb_request_t *sr) 292 { 293 boolean_t created = B_FALSE; 294 boolean_t last_comp_found = B_FALSE; 295 smb_node_t *node = NULL; 296 smb_node_t *dnode = NULL; 297 smb_node_t *cur_node = NULL; 298 smb_arg_open_t *op = &sr->sr_open; 299 int rc; 300 smb_ofile_t *of; 301 smb_attr_t new_attr; 302 int max_requested = 0; 303 uint32_t max_allowed; 304 uint32_t status = NT_STATUS_SUCCESS; 305 int is_dir; 306 smb_error_t err; 307 boolean_t is_stream = B_FALSE; 308 int lookup_flags = SMB_FOLLOW_LINKS; 309 uint32_t uniq_fid; 310 smb_pathname_t *pn = &op->fqi.fq_path; 311 smb_server_t *sv = sr->sr_server; 312 313 /* Get out now if we've been cancelled. */ 314 mutex_enter(&sr->sr_mutex); 315 if (sr->sr_state != SMB_REQ_STATE_ACTIVE) { 316 mutex_exit(&sr->sr_mutex); 317 return (NT_STATUS_CANCELLED); 318 } 319 mutex_exit(&sr->sr_mutex); 320 321 is_dir = (op->create_options & FILE_DIRECTORY_FILE) ? 1 : 0; 322 323 /* 324 * If the object being created or opened is a directory 325 * the Disposition parameter must be one of FILE_CREATE, 326 * FILE_OPEN, or FILE_OPEN_IF 327 */ 328 if (is_dir) { 329 if ((op->create_disposition != FILE_CREATE) && 330 (op->create_disposition != FILE_OPEN_IF) && 331 (op->create_disposition != FILE_OPEN)) { 332 return (NT_STATUS_INVALID_PARAMETER); 333 } 334 } 335 336 if (op->desired_access & MAXIMUM_ALLOWED) { 337 max_requested = 1; 338 op->desired_access &= ~MAXIMUM_ALLOWED; 339 } 340 op->desired_access = smb_access_generic_to_file(op->desired_access); 341 342 if (sr->session->s_file_cnt >= SMB_SESSION_OFILE_MAX) { 343 ASSERT(sr->uid_user); 344 cmn_err(CE_NOTE, "smbsrv[%s\\%s]: TOO_MANY_OPENED_FILES", 345 sr->uid_user->u_domain, sr->uid_user->u_name); 346 return (NT_STATUS_TOO_MANY_OPENED_FILES); 347 } 348 349 /* This must be NULL at this point */ 350 sr->fid_ofile = NULL; 351 352 op->devstate = 0; 353 354 switch (sr->tid_tree->t_res_type & STYPE_MASK) { 355 case STYPE_DISKTREE: 356 case STYPE_PRINTQ: 357 break; 358 359 case STYPE_IPC: 360 /* 361 * Security descriptors for pipes are not implemented, 362 * so just setup a reasonable access mask. 363 */ 364 op->desired_access = (READ_CONTROL | SYNCHRONIZE | 365 FILE_READ_DATA | FILE_READ_ATTRIBUTES | 366 FILE_WRITE_DATA | FILE_APPEND_DATA); 367 368 /* 369 * Limit the number of open pipe instances. 370 */ 371 if ((rc = smb_threshold_enter(&sv->sv_opipe_ct)) != 0) { 372 status = RPC_NT_SERVER_TOO_BUSY; 373 return (status); 374 } 375 376 /* 377 * No further processing for IPC, we need to either 378 * raise an exception or return success here. 379 */ 380 uniq_fid = SMB_UNIQ_FID(); 381 status = smb_opipe_open(sr, uniq_fid); 382 smb_threshold_exit(&sv->sv_opipe_ct); 383 return (status); 384 385 default: 386 return (NT_STATUS_BAD_DEVICE_TYPE); 387 } 388 389 smb_pathname_init(sr, pn, pn->pn_path); 390 if (!smb_pathname_validate(sr, pn)) 391 return (sr->smb_error.status); 392 393 if (strlen(pn->pn_path) >= SMB_MAXPATHLEN) { 394 return (NT_STATUS_OBJECT_PATH_INVALID); 395 } 396 397 if (is_dir) { 398 if (!smb_validate_dirname(sr, pn)) 399 return (sr->smb_error.status); 400 } else { 401 if (!smb_validate_object_name(sr, pn)) 402 return (sr->smb_error.status); 403 } 404 405 cur_node = op->fqi.fq_dnode ? 406 op->fqi.fq_dnode : sr->tid_tree->t_snode; 407 408 rc = smb_pathname_reduce(sr, sr->user_cr, pn->pn_path, 409 sr->tid_tree->t_snode, cur_node, &op->fqi.fq_dnode, 410 op->fqi.fq_last_comp); 411 if (rc != 0) { 412 return (smb_errno2status(rc)); 413 } 414 415 /* 416 * If the access mask has only DELETE set (ignore 417 * FILE_READ_ATTRIBUTES), then assume that this 418 * is a request to delete the link (if a link) 419 * and do not follow links. Otherwise, follow 420 * the link to the target. 421 */ 422 if ((op->desired_access & ~FILE_READ_ATTRIBUTES) == DELETE) 423 lookup_flags &= ~SMB_FOLLOW_LINKS; 424 425 rc = smb_fsop_lookup_name(sr, zone_kcred(), lookup_flags, 426 sr->tid_tree->t_snode, op->fqi.fq_dnode, op->fqi.fq_last_comp, 427 &op->fqi.fq_fnode); 428 429 if (rc == 0) { 430 last_comp_found = B_TRUE; 431 /* 432 * Need the DOS attributes below, where we 433 * check the search attributes (sattr). 434 */ 435 op->fqi.fq_fattr.sa_mask = SMB_AT_DOSATTR; 436 rc = smb_node_getattr(sr, op->fqi.fq_fnode, zone_kcred(), 437 NULL, &op->fqi.fq_fattr); 438 if (rc != 0) { 439 smb_node_release(op->fqi.fq_fnode); 440 smb_node_release(op->fqi.fq_dnode); 441 return (NT_STATUS_INTERNAL_ERROR); 442 } 443 } else if (rc == ENOENT) { 444 last_comp_found = B_FALSE; 445 op->fqi.fq_fnode = NULL; 446 rc = 0; 447 } else { 448 smb_node_release(op->fqi.fq_dnode); 449 return (smb_errno2status(rc)); 450 } 451 452 453 /* 454 * The uniq_fid is a CIFS-server-wide unique identifier for an ofile 455 * which is used to uniquely identify open instances for the 456 * VFS share reservation and POSIX locks. 457 */ 458 459 uniq_fid = SMB_UNIQ_FID(); 460 461 if (last_comp_found) { 462 463 node = op->fqi.fq_fnode; 464 dnode = op->fqi.fq_dnode; 465 466 if (!smb_node_is_file(node) && !smb_node_is_dir(node) && 467 !smb_node_is_symlink(node)) { 468 smb_node_release(node); 469 smb_node_release(dnode); 470 return (NT_STATUS_ACCESS_DENIED); 471 } 472 473 /* 474 * Reject this request if either: 475 * - the target IS a directory and the client requires that 476 * it must NOT be (required by Lotus Notes) 477 * - the target is NOT a directory and client requires that 478 * it MUST be. 479 */ 480 if (smb_node_is_dir(node)) { 481 if (op->create_options & FILE_NON_DIRECTORY_FILE) { 482 smb_node_release(node); 483 smb_node_release(dnode); 484 return (NT_STATUS_FILE_IS_A_DIRECTORY); 485 } 486 } else { 487 if ((op->create_options & FILE_DIRECTORY_FILE) || 488 (op->nt_flags & NT_CREATE_FLAG_OPEN_TARGET_DIR)) { 489 smb_node_release(node); 490 smb_node_release(dnode); 491 return (NT_STATUS_NOT_A_DIRECTORY); 492 } 493 } 494 495 /* 496 * No more open should be accepted when "Delete on close" 497 * flag is set. 498 */ 499 if (node->flags & NODE_FLAGS_DELETE_ON_CLOSE) { 500 smb_node_release(node); 501 smb_node_release(dnode); 502 return (NT_STATUS_DELETE_PENDING); 503 } 504 505 /* 506 * Specified file already exists so the operation should fail. 507 */ 508 if (op->create_disposition == FILE_CREATE) { 509 smb_node_release(node); 510 smb_node_release(dnode); 511 return (NT_STATUS_OBJECT_NAME_COLLISION); 512 } 513 514 /* 515 * Windows seems to check read-only access before file 516 * sharing check. 517 * 518 * Check to see if the file is currently readonly (irrespective 519 * of whether this open will make it readonly). 520 */ 521 if (SMB_PATHFILE_IS_READONLY(sr, node)) { 522 /* Files data only */ 523 if (!smb_node_is_dir(node)) { 524 if (op->desired_access & (FILE_WRITE_DATA | 525 FILE_APPEND_DATA)) { 526 smb_node_release(node); 527 smb_node_release(dnode); 528 return (NT_STATUS_ACCESS_DENIED); 529 } 530 } 531 } 532 533 if ((op->create_disposition == FILE_SUPERSEDE) || 534 (op->create_disposition == FILE_OVERWRITE_IF) || 535 (op->create_disposition == FILE_OVERWRITE)) { 536 537 if (!smb_sattr_check(op->fqi.fq_fattr.sa_dosattr, 538 op->dattr)) { 539 smb_node_release(node); 540 smb_node_release(dnode); 541 return (NT_STATUS_ACCESS_DENIED); 542 } 543 544 if (smb_node_is_dir(node)) { 545 smb_node_release(node); 546 smb_node_release(dnode); 547 return (NT_STATUS_ACCESS_DENIED); 548 } 549 } 550 551 /* MS-FSA 2.1.5.1.2 */ 552 if (op->create_disposition == FILE_SUPERSEDE) 553 op->desired_access |= DELETE; 554 if ((op->create_disposition == FILE_OVERWRITE_IF) || 555 (op->create_disposition == FILE_OVERWRITE)) 556 op->desired_access |= FILE_WRITE_DATA; 557 558 status = smb_fsop_access(sr, sr->user_cr, node, 559 op->desired_access); 560 if (status != NT_STATUS_SUCCESS) { 561 smb_node_release(node); 562 smb_node_release(dnode); 563 564 /* SMB1 specific? NT_STATUS_PRIVILEGE_NOT_HELD */ 565 if (status == NT_STATUS_PRIVILEGE_NOT_HELD) { 566 return (status); 567 } else { 568 return (NT_STATUS_ACCESS_DENIED); 569 } 570 } 571 572 if (max_requested) { 573 smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); 574 op->desired_access |= max_allowed; 575 } 576 /* 577 * According to MS "dochelp" mail in Mar 2015, any handle 578 * on which read or write access is granted implicitly 579 * gets "read attributes", even if it was not requested. 580 * This avoids unexpected access failures later that 581 * would happen if these were not granted. 582 */ 583 if ((op->desired_access & FILE_DATA_ALL) != 0) { 584 op->desired_access |= (READ_CONTROL | 585 FILE_READ_ATTRIBUTES); 586 } 587 588 /* 589 * Oplock break is done prior to sharing checks as the break 590 * may cause other clients to close the file which would 591 * affect the sharing checks. This may block, so set the 592 * file opening count before oplock stuff. 593 */ 594 smb_node_inc_opening_count(node); 595 smb_open_oplock_break(sr, node); 596 597 smb_node_wrlock(node); 598 599 /* 600 * Check for sharing violations 601 */ 602 status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, 603 op->desired_access, op->share_access); 604 if (status == NT_STATUS_SHARING_VIOLATION) { 605 smb_node_unlock(node); 606 smb_node_dec_opening_count(node); 607 smb_node_release(node); 608 smb_node_release(dnode); 609 return (status); 610 } 611 612 /* 613 * Go ahead with modifications as necessary. 614 */ 615 switch (op->create_disposition) { 616 case FILE_SUPERSEDE: 617 case FILE_OVERWRITE_IF: 618 case FILE_OVERWRITE: 619 op->dattr |= FILE_ATTRIBUTE_ARCHIVE; 620 /* Don't apply readonly bit until smb_ofile_close */ 621 if (op->dattr & FILE_ATTRIBUTE_READONLY) { 622 op->created_readonly = B_TRUE; 623 op->dattr &= ~FILE_ATTRIBUTE_READONLY; 624 } 625 626 /* 627 * Truncate the file data here. 628 * We set alloc_size = op->dsize later, 629 * after we have an ofile. See: 630 * smb_set_open_attributes 631 */ 632 bzero(&new_attr, sizeof (new_attr)); 633 new_attr.sa_dosattr = op->dattr; 634 new_attr.sa_vattr.va_size = 0; 635 new_attr.sa_mask = SMB_AT_DOSATTR | SMB_AT_SIZE; 636 rc = smb_fsop_setattr(sr, sr->user_cr, node, &new_attr); 637 if (rc != 0) { 638 smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); 639 smb_node_unlock(node); 640 smb_node_dec_opening_count(node); 641 smb_node_release(node); 642 smb_node_release(dnode); 643 return (smb_errno2status(rc)); 644 } 645 646 /* 647 * If file is being replaced, remove existing streams 648 */ 649 if (SMB_IS_STREAM(node) == 0) { 650 status = smb_fsop_remove_streams(sr, 651 sr->user_cr, node); 652 if (status != 0) { 653 smb_fsop_unshrlock(sr->user_cr, node, 654 uniq_fid); 655 smb_node_unlock(node); 656 smb_node_dec_opening_count(node); 657 smb_node_release(node); 658 smb_node_release(dnode); 659 return (status); 660 } 661 } 662 663 op->action_taken = SMB_OACT_TRUNCATED; 664 break; 665 666 default: 667 /* 668 * FILE_OPEN or FILE_OPEN_IF. 669 */ 670 /* 671 * Ignore any user-specified alloc_size for 672 * existing files, to avoid truncation in 673 * smb_set_open_attributes 674 */ 675 op->dsize = 0L; 676 op->action_taken = SMB_OACT_OPENED; 677 break; 678 } 679 } else { 680 /* Last component was not found. */ 681 dnode = op->fqi.fq_dnode; 682 683 if (is_dir == 0) 684 is_stream = smb_is_stream_name(pn->pn_path); 685 686 if ((op->create_disposition == FILE_OPEN) || 687 (op->create_disposition == FILE_OVERWRITE)) { 688 smb_node_release(dnode); 689 return (NT_STATUS_OBJECT_NAME_NOT_FOUND); 690 } 691 692 if (pn->pn_fname && smb_is_invalid_filename(pn->pn_fname)) { 693 smb_node_release(dnode); 694 return (NT_STATUS_OBJECT_NAME_INVALID); 695 } 696 697 /* 698 * lock the parent dir node in case another create 699 * request to the same parent directory comes in. 700 */ 701 smb_node_wrlock(dnode); 702 703 /* Don't apply readonly bit until smb_ofile_close */ 704 if (op->dattr & FILE_ATTRIBUTE_READONLY) { 705 op->dattr &= ~FILE_ATTRIBUTE_READONLY; 706 op->created_readonly = B_TRUE; 707 } 708 709 bzero(&new_attr, sizeof (new_attr)); 710 if ((op->crtime.tv_sec != 0) && 711 (op->crtime.tv_sec != UINT_MAX)) { 712 713 new_attr.sa_mask |= SMB_AT_CRTIME; 714 new_attr.sa_crtime = op->crtime; 715 } 716 717 if (is_dir == 0) { 718 op->dattr |= FILE_ATTRIBUTE_ARCHIVE; 719 new_attr.sa_dosattr = op->dattr; 720 new_attr.sa_vattr.va_type = VREG; 721 new_attr.sa_vattr.va_mode = is_stream ? S_IRUSR : 722 S_IRUSR | S_IRGRP | S_IROTH | 723 S_IWUSR | S_IWGRP | S_IWOTH; 724 new_attr.sa_mask |= 725 SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; 726 727 /* 728 * We set alloc_size = op->dsize later, 729 * (in smb_set_open_attributes) after we 730 * have an ofile on which to save that. 731 * 732 * Legacy Open&X sets size to alloc_size 733 * when creating a new file. 734 */ 735 if (sr->smb_com == SMB_COM_OPEN_ANDX) { 736 new_attr.sa_vattr.va_size = op->dsize; 737 new_attr.sa_mask |= SMB_AT_SIZE; 738 } 739 740 rc = smb_fsop_create(sr, sr->user_cr, dnode, 741 op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); 742 743 if (rc != 0) { 744 smb_node_unlock(dnode); 745 smb_node_release(dnode); 746 return (smb_errno2status(rc)); 747 } 748 749 node = op->fqi.fq_fnode; 750 smb_node_inc_opening_count(node); 751 smb_node_wrlock(node); 752 753 status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, 754 op->desired_access, op->share_access); 755 756 if (status == NT_STATUS_SHARING_VIOLATION) { 757 smb_node_unlock(node); 758 smb_node_dec_opening_count(node); 759 smb_delete_new_object(sr); 760 smb_node_release(node); 761 smb_node_unlock(dnode); 762 smb_node_release(dnode); 763 return (status); 764 } 765 } else { 766 op->dattr |= FILE_ATTRIBUTE_DIRECTORY; 767 new_attr.sa_dosattr = op->dattr; 768 new_attr.sa_vattr.va_type = VDIR; 769 new_attr.sa_vattr.va_mode = 0777; 770 new_attr.sa_mask |= 771 SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; 772 773 rc = smb_fsop_mkdir(sr, sr->user_cr, dnode, 774 op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); 775 if (rc != 0) { 776 smb_node_unlock(dnode); 777 smb_node_release(dnode); 778 return (smb_errno2status(rc)); 779 } 780 781 node = op->fqi.fq_fnode; 782 smb_node_inc_opening_count(node); 783 smb_node_wrlock(node); 784 } 785 786 created = B_TRUE; 787 op->action_taken = SMB_OACT_CREATED; 788 789 if (max_requested) { 790 smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); 791 op->desired_access |= max_allowed; 792 } 793 /* 794 * We created this object (we own it) so grant 795 * read_control + read_attributes on this handle, 796 * even if that was not requested. This avoids 797 * unexpected access failures later. 798 */ 799 op->desired_access |= (READ_CONTROL | FILE_READ_ATTRIBUTES); 800 } 801 802 status = NT_STATUS_SUCCESS; 803 804 of = smb_ofile_open(sr, node, op, SMB_FTYPE_DISK, uniq_fid, 805 &err); 806 if (of == NULL) { 807 status = err.status; 808 } 809 810 /* 811 * We might have blocked in smb_ofile_open long enough so a 812 * tree disconnect might have happened. In that case, we've 813 * just added an ofile to a tree that's disconnecting, and 814 * need to undo that to avoid interfering with tear-down of 815 * the tree connection. 816 */ 817 if (status == NT_STATUS_SUCCESS && 818 !smb_tree_is_connected(sr->tid_tree)) { 819 status = NT_STATUS_INVALID_PARAMETER; 820 } 821 822 /* 823 * This MUST be done after ofile creation, so that explicitly 824 * set timestamps can be remembered on the ofile, and the 825 * readonly flag will be stored "pending" on the node. 826 */ 827 if (status == NT_STATUS_SUCCESS) { 828 if ((rc = smb_set_open_attributes(sr, of)) != 0) { 829 status = smb_errno2status(rc); 830 } 831 } 832 833 if (status == NT_STATUS_SUCCESS) { 834 /* 835 * We've already done access checks above, 836 * and want this call to succeed even when 837 * !(desired_access & FILE_READ_ATTRIBUTES), 838 * so pass kcred here. 839 */ 840 op->fqi.fq_fattr.sa_mask = SMB_AT_ALL; 841 rc = smb_node_getattr(sr, node, zone_kcred(), of, 842 &op->fqi.fq_fattr); 843 if (rc != 0) { 844 status = NT_STATUS_INTERNAL_ERROR; 845 } 846 } 847 848 /* 849 * smb_fsop_unshrlock is a no-op if node is a directory 850 * smb_fsop_unshrlock is done in smb_ofile_close 851 */ 852 if (status != NT_STATUS_SUCCESS) { 853 if (of == NULL) { 854 smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); 855 } else { 856 smb_ofile_close(of, 0); 857 smb_ofile_release(of); 858 } 859 if (created) 860 smb_delete_new_object(sr); 861 smb_node_unlock(node); 862 smb_node_dec_opening_count(node); 863 smb_node_release(node); 864 if (created) 865 smb_node_unlock(dnode); 866 smb_node_release(dnode); 867 return (status); 868 } 869 870 /* 871 * Propagate the write-through mode from the open params 872 * to the node: see the notes in the function header. 873 */ 874 if (sr->sr_cfg->skc_sync_enable || 875 (op->create_options & FILE_WRITE_THROUGH)) 876 node->flags |= NODE_FLAGS_WRITE_THROUGH; 877 878 /* 879 * Set up the fileid and dosattr in open_param for response 880 */ 881 op->fileid = op->fqi.fq_fattr.sa_vattr.va_nodeid; 882 op->dattr = op->fqi.fq_fattr.sa_dosattr; 883 884 /* 885 * Set up the file type in open_param for the response 886 */ 887 op->ftype = SMB_FTYPE_DISK; 888 sr->smb_fid = of->f_fid; 889 sr->fid_ofile = of; 890 891 if (smb_node_is_file(node)) { 892 smb_oplock_acquire(sr, node, of); 893 op->dsize = op->fqi.fq_fattr.sa_vattr.va_size; 894 } else { 895 /* directory or symlink */ 896 op->op_oplock_level = SMB_OPLOCK_NONE; 897 op->dsize = 0; 898 } 899 900 smb_node_dec_opening_count(node); 901 902 smb_node_unlock(node); 903 if (created) 904 smb_node_unlock(dnode); 905 906 smb_node_release(node); 907 smb_node_release(dnode); 908 909 return (NT_STATUS_SUCCESS); 910 } 911 912 /* 913 * smb_open_oplock_break 914 * 915 * If the node has an ofile opened with share access none, 916 * (smb_node_share_check = FALSE) only break BATCH oplock. 917 * Otherwise: 918 * If overwriting, break to SMB_OPLOCK_NONE, else 919 * If opening for anything other than attribute access, 920 * break oplock to LEVEL_II. 921 */ 922 static void 923 smb_open_oplock_break(smb_request_t *sr, smb_node_t *node) 924 { 925 smb_arg_open_t *op = &sr->sr_open; 926 uint32_t flags = 0; 927 928 if (!smb_node_share_check(node)) 929 flags |= SMB_OPLOCK_BREAK_BATCH; 930 931 if (smb_open_overwrite(op)) { 932 flags |= SMB_OPLOCK_BREAK_TO_NONE; 933 (void) smb_oplock_break(sr, node, flags); 934 } else if (!smb_open_attr_only(op)) { 935 flags |= SMB_OPLOCK_BREAK_TO_LEVEL_II; 936 (void) smb_oplock_break(sr, node, flags); 937 } 938 } 939 940 /* 941 * smb_open_attr_only 942 * 943 * Determine if file is being opened for attribute access only. 944 * This is used to determine whether it is necessary to break 945 * existing oplocks on the file. 946 */ 947 static boolean_t 948 smb_open_attr_only(smb_arg_open_t *op) 949 { 950 if (((op->desired_access & ~(FILE_READ_ATTRIBUTES | 951 FILE_WRITE_ATTRIBUTES | SYNCHRONIZE | READ_CONTROL)) == 0) && 952 (op->create_disposition != FILE_SUPERSEDE) && 953 (op->create_disposition != FILE_OVERWRITE)) { 954 return (B_TRUE); 955 } 956 return (B_FALSE); 957 } 958 959 static boolean_t 960 smb_open_overwrite(smb_arg_open_t *op) 961 { 962 if ((op->create_disposition == FILE_SUPERSEDE) || 963 (op->create_disposition == FILE_OVERWRITE_IF) || 964 (op->create_disposition == FILE_OVERWRITE)) { 965 return (B_TRUE); 966 } 967 return (B_FALSE); 968 } 969 970 /* 971 * smb_set_open_attributes 972 * 973 * Last write time: 974 * - If the last_write time specified in the open params is not 0 or -1, 975 * use it as file's mtime. This will be considered an explicitly set 976 * timestamps, not reset by subsequent writes. 977 * 978 * DOS attributes 979 * - If we created_readonly, we now store the real DOS attributes 980 * (including the readonly bit) so subsequent opens will see it. 981 * 982 * Both are stored "pending" rather than in the file system. 983 * 984 * Returns: errno 985 */ 986 static int 987 smb_set_open_attributes(smb_request_t *sr, smb_ofile_t *of) 988 { 989 smb_attr_t attr; 990 smb_arg_open_t *op = &sr->sr_open; 991 smb_node_t *node = of->f_node; 992 int rc = 0; 993 994 bzero(&attr, sizeof (smb_attr_t)); 995 996 if (op->created_readonly) { 997 attr.sa_dosattr = op->dattr | FILE_ATTRIBUTE_READONLY; 998 attr.sa_mask |= SMB_AT_DOSATTR; 999 } 1000 1001 if (op->dsize != 0) { 1002 attr.sa_allocsz = op->dsize; 1003 attr.sa_mask |= SMB_AT_ALLOCSZ; 1004 } 1005 1006 if ((op->mtime.tv_sec != 0) && (op->mtime.tv_sec != UINT_MAX)) { 1007 attr.sa_vattr.va_mtime = op->mtime; 1008 attr.sa_mask |= SMB_AT_MTIME; 1009 } 1010 1011 /* 1012 * Used to have code here to set mtime, ctime, atime 1013 * when the open op->create_disposition is any of: 1014 * FILE_SUPERSEDE, FILE_OVERWRITE_IF, FILE_OVERWRITE. 1015 * We know that in those cases we will have set the 1016 * file size, in which case the file system will 1017 * update those times, so we don't have to. 1018 * 1019 * However, keep track of the fact that we modified 1020 * the file via this handle, so we can do the evil, 1021 * gratuitious mtime update on close that Windows 1022 * clients appear to expect. 1023 */ 1024 if (op->action_taken == SMB_OACT_TRUNCATED) 1025 of->f_written = B_TRUE; 1026 1027 if (attr.sa_mask != 0) 1028 rc = smb_node_setattr(sr, node, of->f_cr, of, &attr); 1029 1030 return (rc); 1031 } 1032 1033 /* 1034 * This function is used to delete a newly created object (file or 1035 * directory) if an error occurs after creation of the object. 1036 */ 1037 static void 1038 smb_delete_new_object(smb_request_t *sr) 1039 { 1040 smb_arg_open_t *op = &sr->sr_open; 1041 smb_fqi_t *fqi = &(op->fqi); 1042 uint32_t flags = 0; 1043 1044 if (SMB_TREE_IS_CASEINSENSITIVE(sr)) 1045 flags |= SMB_IGNORE_CASE; 1046 if (SMB_TREE_SUPPORTS_CATIA(sr)) 1047 flags |= SMB_CATIA; 1048 1049 if (op->create_options & FILE_DIRECTORY_FILE) 1050 (void) smb_fsop_rmdir(sr, sr->user_cr, fqi->fq_dnode, 1051 fqi->fq_last_comp, flags); 1052 else 1053 (void) smb_fsop_remove(sr, sr->user_cr, fqi->fq_dnode, 1054 fqi->fq_last_comp, flags); 1055 } 1056