1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> 4 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 5 */ 6 7 #include <linux/moduleparam.h> 8 9 #include "glob.h" 10 #include "oplock.h" 11 12 #include "smb_common.h" 13 #include "../common/smb2status.h" 14 #include "connection.h" 15 #include "mgmt/user_session.h" 16 #include "mgmt/share_config.h" 17 #include "mgmt/tree_connect.h" 18 19 static LIST_HEAD(lease_table_list); 20 static DEFINE_RWLOCK(lease_list_lock); 21 22 /** 23 * alloc_opinfo() - allocate a new opinfo object for oplock info 24 * @work: smb work 25 * @id: fid of open file 26 * @Tid: tree id of connection 27 * 28 * Return: allocated opinfo object on success, otherwise NULL 29 */ 30 static struct oplock_info *alloc_opinfo(struct ksmbd_work *work, 31 u64 id, __u16 Tid) 32 { 33 struct ksmbd_session *sess = work->sess; 34 struct oplock_info *opinfo; 35 36 opinfo = kzalloc_obj(struct oplock_info, KSMBD_DEFAULT_GFP); 37 if (!opinfo) 38 return NULL; 39 40 opinfo->sess = sess; 41 opinfo->conn = ksmbd_conn_get(work->conn); 42 opinfo->level = SMB2_OPLOCK_LEVEL_NONE; 43 opinfo->op_state = OPLOCK_STATE_NONE; 44 opinfo->pending_break = 0; 45 opinfo->fid = id; 46 opinfo->Tid = Tid; 47 INIT_LIST_HEAD(&opinfo->op_entry); 48 init_waitqueue_head(&opinfo->oplock_q); 49 init_waitqueue_head(&opinfo->oplock_brk); 50 atomic_set(&opinfo->refcount, 1); 51 atomic_set(&opinfo->breaking_cnt, 0); 52 53 return opinfo; 54 } 55 56 static void lease_add_list(struct oplock_info *opinfo) 57 { 58 struct lease_table *lb = opinfo->o_lease->l_lb; 59 60 spin_lock(&lb->lb_lock); 61 list_add_rcu(&opinfo->lease_entry, &lb->lease_list); 62 spin_unlock(&lb->lb_lock); 63 } 64 65 static void lease_del_list(struct oplock_info *opinfo) 66 { 67 struct lease_table *lb = opinfo->o_lease->l_lb; 68 69 if (!lb) 70 return; 71 72 spin_lock(&lb->lb_lock); 73 if (list_empty(&opinfo->lease_entry)) { 74 spin_unlock(&lb->lb_lock); 75 return; 76 } 77 78 list_del_init(&opinfo->lease_entry); 79 opinfo->o_lease->l_lb = NULL; 80 spin_unlock(&lb->lb_lock); 81 } 82 83 static struct lease_table *alloc_lease_table(struct oplock_info *opinfo) 84 { 85 struct lease_table *lb; 86 87 lb = kmalloc_obj(struct lease_table, KSMBD_DEFAULT_GFP); 88 if (!lb) 89 return NULL; 90 91 memcpy(lb->client_guid, opinfo->conn->ClientGUID, 92 SMB2_CLIENT_GUID_SIZE); 93 INIT_LIST_HEAD(&lb->lease_list); 94 spin_lock_init(&lb->lb_lock); 95 return lb; 96 } 97 98 static int alloc_lease(struct oplock_info *opinfo, struct lease_ctx_info *lctx) 99 { 100 struct lease *lease; 101 102 lease = kmalloc_obj(struct lease, KSMBD_DEFAULT_GFP); 103 if (!lease) 104 return -ENOMEM; 105 106 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE); 107 lease->state = lctx->req_state; 108 lease->new_state = 0; 109 lease->flags = lctx->flags; 110 lease->duration = lctx->duration; 111 lease->is_dir = lctx->is_dir; 112 memcpy(lease->parent_lease_key, lctx->parent_lease_key, SMB2_LEASE_KEY_SIZE); 113 lease->version = lctx->version; 114 lease->epoch = le16_to_cpu(lctx->epoch) + 1; 115 INIT_LIST_HEAD(&opinfo->lease_entry); 116 opinfo->o_lease = lease; 117 118 return 0; 119 } 120 121 static void free_lease(struct oplock_info *opinfo) 122 { 123 struct lease *lease; 124 125 lease = opinfo->o_lease; 126 kfree(lease); 127 } 128 129 static void __free_opinfo(struct oplock_info *opinfo) 130 { 131 if (opinfo->is_lease) 132 free_lease(opinfo); 133 ksmbd_conn_put(opinfo->conn); 134 kfree(opinfo); 135 } 136 137 static void free_opinfo_rcu(struct rcu_head *rcu) 138 { 139 struct oplock_info *opinfo = container_of(rcu, struct oplock_info, rcu); 140 141 __free_opinfo(opinfo); 142 } 143 144 static void free_opinfo(struct oplock_info *opinfo) 145 { 146 call_rcu(&opinfo->rcu, free_opinfo_rcu); 147 } 148 149 struct oplock_info *opinfo_get(struct ksmbd_file *fp) 150 { 151 struct oplock_info *opinfo; 152 153 rcu_read_lock(); 154 opinfo = rcu_dereference(fp->f_opinfo); 155 if (opinfo && !atomic_inc_not_zero(&opinfo->refcount)) 156 opinfo = NULL; 157 rcu_read_unlock(); 158 159 return opinfo; 160 } 161 162 static struct oplock_info *opinfo_get_list(struct ksmbd_inode *ci) 163 { 164 struct oplock_info *opinfo; 165 166 down_read(&ci->m_lock); 167 opinfo = list_first_entry_or_null(&ci->m_op_list, struct oplock_info, 168 op_entry); 169 if (opinfo) { 170 if (opinfo->conn == NULL || 171 !atomic_inc_not_zero(&opinfo->refcount)) 172 opinfo = NULL; 173 else { 174 if (ksmbd_conn_releasing(opinfo->conn)) { 175 atomic_dec(&opinfo->refcount); 176 opinfo = NULL; 177 } 178 } 179 } 180 up_read(&ci->m_lock); 181 182 return opinfo; 183 } 184 185 void opinfo_put(struct oplock_info *opinfo) 186 { 187 if (!opinfo) 188 return; 189 190 if (!atomic_dec_and_test(&opinfo->refcount)) 191 return; 192 193 free_opinfo(opinfo); 194 } 195 196 static void opinfo_add(struct oplock_info *opinfo, struct ksmbd_file *fp) 197 { 198 struct ksmbd_inode *ci = fp->f_ci; 199 200 down_write(&ci->m_lock); 201 list_add(&opinfo->op_entry, &ci->m_op_list); 202 up_write(&ci->m_lock); 203 } 204 205 static void opinfo_del(struct oplock_info *opinfo) 206 { 207 struct ksmbd_inode *ci = opinfo->o_fp->f_ci; 208 209 if (opinfo->is_lease) { 210 write_lock(&lease_list_lock); 211 lease_del_list(opinfo); 212 write_unlock(&lease_list_lock); 213 } 214 down_write(&ci->m_lock); 215 list_del(&opinfo->op_entry); 216 up_write(&ci->m_lock); 217 } 218 219 static unsigned long opinfo_count(struct ksmbd_file *fp) 220 { 221 if (ksmbd_stream_fd(fp)) 222 return atomic_read(&fp->f_ci->sop_count); 223 else 224 return atomic_read(&fp->f_ci->op_count); 225 } 226 227 static void opinfo_count_inc(struct ksmbd_file *fp) 228 { 229 if (ksmbd_stream_fd(fp)) 230 return atomic_inc(&fp->f_ci->sop_count); 231 else 232 return atomic_inc(&fp->f_ci->op_count); 233 } 234 235 static void opinfo_count_dec(struct ksmbd_file *fp) 236 { 237 if (ksmbd_stream_fd(fp)) 238 return atomic_dec(&fp->f_ci->sop_count); 239 else 240 return atomic_dec(&fp->f_ci->op_count); 241 } 242 243 /** 244 * opinfo_write_to_read() - convert a write oplock to read oplock 245 * @opinfo: current oplock info 246 * 247 * Return: 0 on success, otherwise -EINVAL 248 */ 249 int opinfo_write_to_read(struct oplock_info *opinfo) 250 { 251 struct lease *lease = opinfo->o_lease; 252 253 if (!(opinfo->level == SMB2_OPLOCK_LEVEL_BATCH || 254 opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) { 255 pr_err("bad oplock(0x%x)\n", opinfo->level); 256 if (opinfo->is_lease) 257 pr_err("lease state(0x%x)\n", lease->state); 258 return -EINVAL; 259 } 260 opinfo->level = SMB2_OPLOCK_LEVEL_II; 261 262 if (opinfo->is_lease) 263 lease->state = lease->new_state; 264 return 0; 265 } 266 267 /** 268 * opinfo_read_handle_to_read() - convert a read/handle oplock to read oplock 269 * @opinfo: current oplock info 270 * 271 * Return: 0 on success, otherwise -EINVAL 272 */ 273 int opinfo_read_handle_to_read(struct oplock_info *opinfo) 274 { 275 struct lease *lease = opinfo->o_lease; 276 277 lease->state = lease->new_state; 278 opinfo->level = SMB2_OPLOCK_LEVEL_II; 279 return 0; 280 } 281 282 /** 283 * opinfo_write_to_none() - convert a write oplock to none 284 * @opinfo: current oplock info 285 * 286 * Return: 0 on success, otherwise -EINVAL 287 */ 288 int opinfo_write_to_none(struct oplock_info *opinfo) 289 { 290 struct lease *lease = opinfo->o_lease; 291 292 if (!(opinfo->level == SMB2_OPLOCK_LEVEL_BATCH || 293 opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) { 294 pr_err("bad oplock(0x%x)\n", opinfo->level); 295 if (opinfo->is_lease) 296 pr_err("lease state(0x%x)\n", lease->state); 297 return -EINVAL; 298 } 299 opinfo->level = SMB2_OPLOCK_LEVEL_NONE; 300 if (opinfo->is_lease) 301 lease->state = lease->new_state; 302 return 0; 303 } 304 305 /** 306 * opinfo_read_to_none() - convert a write read to none 307 * @opinfo: current oplock info 308 * 309 * Return: 0 on success, otherwise -EINVAL 310 */ 311 int opinfo_read_to_none(struct oplock_info *opinfo) 312 { 313 struct lease *lease = opinfo->o_lease; 314 315 if (opinfo->level != SMB2_OPLOCK_LEVEL_II) { 316 pr_err("bad oplock(0x%x)\n", opinfo->level); 317 if (opinfo->is_lease) 318 pr_err("lease state(0x%x)\n", lease->state); 319 return -EINVAL; 320 } 321 opinfo->level = SMB2_OPLOCK_LEVEL_NONE; 322 if (opinfo->is_lease) 323 lease->state = lease->new_state; 324 return 0; 325 } 326 327 /** 328 * lease_read_to_write() - upgrade lease state from read to write 329 * @opinfo: current lease info 330 * 331 * Return: 0 on success, otherwise -EINVAL 332 */ 333 int lease_read_to_write(struct oplock_info *opinfo) 334 { 335 struct lease *lease = opinfo->o_lease; 336 337 if (!(lease->state & SMB2_LEASE_READ_CACHING_LE)) { 338 ksmbd_debug(OPLOCK, "bad lease state(0x%x)\n", lease->state); 339 return -EINVAL; 340 } 341 342 lease->new_state = SMB2_LEASE_NONE_LE; 343 lease->state |= SMB2_LEASE_WRITE_CACHING_LE; 344 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE) 345 opinfo->level = SMB2_OPLOCK_LEVEL_BATCH; 346 else 347 opinfo->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE; 348 return 0; 349 } 350 351 /** 352 * lease_none_upgrade() - upgrade lease state from none 353 * @opinfo: current lease info 354 * @new_state: new lease state 355 * 356 * Return: 0 on success, otherwise -EINVAL 357 */ 358 static int lease_none_upgrade(struct oplock_info *opinfo, __le32 new_state) 359 { 360 struct lease *lease = opinfo->o_lease; 361 362 if (!(lease->state == SMB2_LEASE_NONE_LE)) { 363 ksmbd_debug(OPLOCK, "bad lease state(0x%x)\n", lease->state); 364 return -EINVAL; 365 } 366 367 lease->new_state = SMB2_LEASE_NONE_LE; 368 lease->state = new_state; 369 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE) 370 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 371 opinfo->level = SMB2_OPLOCK_LEVEL_BATCH; 372 else 373 opinfo->level = SMB2_OPLOCK_LEVEL_II; 374 else if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 375 opinfo->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE; 376 else if (lease->state & SMB2_LEASE_READ_CACHING_LE) 377 opinfo->level = SMB2_OPLOCK_LEVEL_II; 378 379 return 0; 380 } 381 382 /** 383 * close_id_del_oplock() - release oplock object at file close time 384 * @fp: ksmbd file pointer 385 */ 386 void close_id_del_oplock(struct ksmbd_file *fp) 387 { 388 struct oplock_info *opinfo; 389 390 if (fp->reserve_lease_break) 391 smb_lazy_parent_lease_break_close(fp); 392 393 opinfo = opinfo_get(fp); 394 if (!opinfo) 395 return; 396 397 opinfo_del(opinfo); 398 399 rcu_assign_pointer(fp->f_opinfo, NULL); 400 if (opinfo->op_state == OPLOCK_ACK_WAIT) { 401 opinfo->op_state = OPLOCK_CLOSING; 402 wake_up_interruptible_all(&opinfo->oplock_q); 403 if (opinfo->is_lease) { 404 atomic_set(&opinfo->breaking_cnt, 0); 405 wake_up_interruptible_all(&opinfo->oplock_brk); 406 } 407 } 408 409 opinfo_count_dec(fp); 410 atomic_dec(&opinfo->refcount); 411 opinfo_put(opinfo); 412 } 413 414 /** 415 * grant_write_oplock() - grant exclusive/batch oplock or write lease 416 * @opinfo_new: new oplock info object 417 * @req_oplock: request oplock 418 * @lctx: lease context information 419 * 420 * Return: 0 421 */ 422 static void grant_write_oplock(struct oplock_info *opinfo_new, int req_oplock, 423 struct lease_ctx_info *lctx) 424 { 425 struct lease *lease = opinfo_new->o_lease; 426 427 if (req_oplock == SMB2_OPLOCK_LEVEL_BATCH) 428 opinfo_new->level = SMB2_OPLOCK_LEVEL_BATCH; 429 else 430 opinfo_new->level = SMB2_OPLOCK_LEVEL_EXCLUSIVE; 431 432 if (lctx) { 433 lease->state = lctx->req_state; 434 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE); 435 } 436 } 437 438 /** 439 * grant_read_oplock() - grant level2 oplock or read lease 440 * @opinfo_new: new oplock info object 441 * @lctx: lease context information 442 * 443 * Return: 0 444 */ 445 static void grant_read_oplock(struct oplock_info *opinfo_new, 446 struct lease_ctx_info *lctx) 447 { 448 struct lease *lease = opinfo_new->o_lease; 449 450 opinfo_new->level = SMB2_OPLOCK_LEVEL_II; 451 452 if (lctx) { 453 lease->state = SMB2_LEASE_READ_CACHING_LE; 454 if (lctx->req_state & SMB2_LEASE_HANDLE_CACHING_LE) 455 lease->state |= SMB2_LEASE_HANDLE_CACHING_LE; 456 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE); 457 } 458 } 459 460 /** 461 * grant_none_oplock() - grant none oplock or none lease 462 * @opinfo_new: new oplock info object 463 * @lctx: lease context information 464 * 465 * Return: 0 466 */ 467 static void grant_none_oplock(struct oplock_info *opinfo_new, 468 struct lease_ctx_info *lctx) 469 { 470 struct lease *lease = opinfo_new->o_lease; 471 472 opinfo_new->level = SMB2_OPLOCK_LEVEL_NONE; 473 474 if (lctx) { 475 lease->state = 0; 476 memcpy(lease->lease_key, lctx->lease_key, SMB2_LEASE_KEY_SIZE); 477 } 478 } 479 480 static inline int compare_guid_key(struct oplock_info *opinfo, 481 const char *guid1, const char *key1) 482 { 483 const char *guid2, *key2; 484 struct ksmbd_conn *conn; 485 486 conn = READ_ONCE(opinfo->conn); 487 if (!conn) 488 return 0; 489 guid2 = conn->ClientGUID; 490 key2 = opinfo->o_lease->lease_key; 491 if (!memcmp(guid1, guid2, SMB2_CLIENT_GUID_SIZE) && 492 !memcmp(key1, key2, SMB2_LEASE_KEY_SIZE)) 493 return 1; 494 495 return 0; 496 } 497 498 /** 499 * same_client_has_lease() - check whether current lease request is 500 * from lease owner of file 501 * @ci: master file pointer 502 * @client_guid: Client GUID 503 * @lctx: lease context information 504 * 505 * Return: oplock(lease) object on success, otherwise NULL 506 */ 507 static struct oplock_info *same_client_has_lease(struct ksmbd_inode *ci, 508 char *client_guid, 509 struct lease_ctx_info *lctx) 510 { 511 int ret; 512 struct lease *lease; 513 struct oplock_info *opinfo; 514 struct oplock_info *m_opinfo = NULL; 515 516 if (!lctx) 517 return NULL; 518 519 /* 520 * Compare lease key and client_guid to know request from same owner 521 * of same client 522 */ 523 down_read(&ci->m_lock); 524 list_for_each_entry(opinfo, &ci->m_op_list, op_entry) { 525 if (!opinfo->is_lease || !opinfo->conn) 526 continue; 527 lease = opinfo->o_lease; 528 529 ret = compare_guid_key(opinfo, client_guid, lctx->lease_key); 530 if (ret) { 531 m_opinfo = opinfo; 532 /* skip upgrading lease about breaking lease */ 533 if (atomic_read(&opinfo->breaking_cnt)) 534 continue; 535 536 /* upgrading lease */ 537 if ((atomic_read(&ci->op_count) + 538 atomic_read(&ci->sop_count)) == 1) { 539 if (lease->state != SMB2_LEASE_NONE_LE && 540 lease->state == (lctx->req_state & lease->state)) { 541 lease->epoch++; 542 lease->state |= lctx->req_state; 543 if (lctx->req_state & 544 SMB2_LEASE_WRITE_CACHING_LE) 545 lease_read_to_write(opinfo); 546 547 } 548 } else if ((atomic_read(&ci->op_count) + 549 atomic_read(&ci->sop_count)) > 1) { 550 if (lctx->req_state == 551 (SMB2_LEASE_READ_CACHING_LE | 552 SMB2_LEASE_HANDLE_CACHING_LE)) { 553 lease->epoch++; 554 lease->state = lctx->req_state; 555 } 556 } 557 558 if (lctx->req_state && lease->state == 559 SMB2_LEASE_NONE_LE) { 560 lease->epoch++; 561 lease_none_upgrade(opinfo, lctx->req_state); 562 } 563 } 564 } 565 up_read(&ci->m_lock); 566 567 return m_opinfo; 568 } 569 570 static void wait_for_break_ack(struct oplock_info *opinfo) 571 { 572 int rc = 0; 573 574 rc = wait_event_interruptible_timeout(opinfo->oplock_q, 575 opinfo->op_state == OPLOCK_STATE_NONE || 576 opinfo->op_state == OPLOCK_CLOSING, 577 OPLOCK_WAIT_TIME); 578 579 /* is this a timeout ? */ 580 if (!rc) { 581 if (opinfo->is_lease) 582 opinfo->o_lease->state = SMB2_LEASE_NONE_LE; 583 opinfo->level = SMB2_OPLOCK_LEVEL_NONE; 584 opinfo->op_state = OPLOCK_STATE_NONE; 585 } 586 } 587 588 static void wake_up_oplock_break(struct oplock_info *opinfo) 589 { 590 clear_bit_unlock(0, &opinfo->pending_break); 591 /* memory barrier is needed for wake_up_bit() */ 592 smp_mb__after_atomic(); 593 wake_up_bit(&opinfo->pending_break, 0); 594 } 595 596 static int oplock_break_pending(struct oplock_info *opinfo, int req_op_level) 597 { 598 while (test_and_set_bit(0, &opinfo->pending_break)) { 599 wait_on_bit(&opinfo->pending_break, 0, TASK_UNINTERRUPTIBLE); 600 601 /* Not immediately break to none. */ 602 opinfo->open_trunc = 0; 603 604 if (opinfo->op_state == OPLOCK_CLOSING) 605 return -ENOENT; 606 else if (opinfo->level <= req_op_level) { 607 if (opinfo->is_lease == false) 608 return 1; 609 610 if (opinfo->o_lease->state != 611 (SMB2_LEASE_HANDLE_CACHING_LE | 612 SMB2_LEASE_READ_CACHING_LE)) 613 return 1; 614 } 615 } 616 617 if (opinfo->level <= req_op_level) { 618 if (opinfo->is_lease == false) { 619 wake_up_oplock_break(opinfo); 620 return 1; 621 } 622 if (opinfo->o_lease->state != 623 (SMB2_LEASE_HANDLE_CACHING_LE | 624 SMB2_LEASE_READ_CACHING_LE)) { 625 wake_up_oplock_break(opinfo); 626 return 1; 627 } 628 } 629 return 0; 630 } 631 632 /** 633 * __smb2_oplock_break_noti() - send smb2 oplock break cmd from conn 634 * to client 635 * @wk: smb work object 636 * 637 * There are two ways this function can be called. 1- while file open we break 638 * from exclusive/batch lock to levelII oplock and 2- while file write/truncate 639 * we break from levelII oplock no oplock. 640 * work->request_buf contains oplock_info. 641 */ 642 static void __smb2_oplock_break_noti(struct work_struct *wk) 643 { 644 struct smb2_oplock_break *rsp = NULL; 645 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work); 646 struct ksmbd_conn *conn = work->conn; 647 struct oplock_break_info *br_info = work->request_buf; 648 struct smb2_hdr *rsp_hdr; 649 struct ksmbd_file *fp; 650 651 fp = ksmbd_lookup_global_fd(br_info->fid); 652 if (!fp) 653 goto out; 654 655 if (allocate_interim_rsp_buf(work)) { 656 pr_err("smb2_allocate_rsp_buf failed! "); 657 ksmbd_fd_put(work, fp); 658 goto out; 659 } 660 661 rsp_hdr = smb_get_msg(work->response_buf); 662 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 663 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 664 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 665 rsp_hdr->CreditRequest = cpu_to_le16(0); 666 rsp_hdr->Command = SMB2_OPLOCK_BREAK; 667 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 668 rsp_hdr->NextCommand = 0; 669 rsp_hdr->MessageId = cpu_to_le64(-1); 670 rsp_hdr->Id.SyncId.ProcessId = 0; 671 rsp_hdr->Id.SyncId.TreeId = 0; 672 rsp_hdr->SessionId = 0; 673 memset(rsp_hdr->Signature, 0, 16); 674 675 rsp = smb_get_msg(work->response_buf); 676 677 rsp->StructureSize = cpu_to_le16(24); 678 if (!br_info->open_trunc && 679 (br_info->level == SMB2_OPLOCK_LEVEL_BATCH || 680 br_info->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 681 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_II; 682 else 683 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 684 rsp->Reserved = 0; 685 rsp->Reserved2 = 0; 686 rsp->PersistentFid = fp->persistent_id; 687 rsp->VolatileFid = fp->volatile_id; 688 689 ksmbd_fd_put(work, fp); 690 if (ksmbd_iov_pin_rsp(work, (void *)rsp, 691 sizeof(struct smb2_oplock_break))) 692 goto out; 693 694 ksmbd_debug(OPLOCK, 695 "sending oplock break v_id %llu p_id = %llu lock level = %d\n", 696 rsp->VolatileFid, rsp->PersistentFid, rsp->OplockLevel); 697 698 ksmbd_conn_write(work); 699 700 out: 701 ksmbd_free_work_struct(work); 702 ksmbd_conn_r_count_dec(conn); 703 } 704 705 /** 706 * smb2_oplock_break_noti() - send smb2 exclusive/batch to level2 oplock 707 * break command from server to client 708 * @opinfo: oplock info object 709 * 710 * Return: 0 on success, otherwise error 711 */ 712 static int smb2_oplock_break_noti(struct oplock_info *opinfo) 713 { 714 struct ksmbd_conn *conn; 715 struct oplock_break_info *br_info; 716 int ret = 0; 717 struct ksmbd_work *work; 718 719 conn = READ_ONCE(opinfo->conn); 720 if (!conn) 721 return 0; 722 723 work = ksmbd_alloc_work_struct(); 724 if (!work) 725 return -ENOMEM; 726 727 br_info = kmalloc_obj(struct oplock_break_info, KSMBD_DEFAULT_GFP); 728 if (!br_info) { 729 ksmbd_free_work_struct(work); 730 return -ENOMEM; 731 } 732 733 br_info->level = opinfo->level; 734 br_info->fid = opinfo->fid; 735 br_info->open_trunc = opinfo->open_trunc; 736 737 work->request_buf = (char *)br_info; 738 work->conn = conn; 739 work->sess = opinfo->sess; 740 741 ksmbd_conn_r_count_inc(conn); 742 if (opinfo->op_state == OPLOCK_ACK_WAIT) { 743 INIT_WORK(&work->work, __smb2_oplock_break_noti); 744 ksmbd_queue_work(work); 745 746 wait_for_break_ack(opinfo); 747 } else { 748 __smb2_oplock_break_noti(&work->work); 749 if (opinfo->level == SMB2_OPLOCK_LEVEL_II) 750 opinfo->level = SMB2_OPLOCK_LEVEL_NONE; 751 } 752 return ret; 753 } 754 755 /** 756 * __smb2_lease_break_noti() - send lease break command from server 757 * to client 758 * @wk: smb work object 759 */ 760 static void __smb2_lease_break_noti(struct work_struct *wk) 761 { 762 struct smb2_lease_break *rsp = NULL; 763 struct ksmbd_work *work = container_of(wk, struct ksmbd_work, work); 764 struct ksmbd_conn *conn = work->conn; 765 struct lease_break_info *br_info = work->request_buf; 766 struct smb2_hdr *rsp_hdr; 767 768 if (allocate_interim_rsp_buf(work)) { 769 ksmbd_debug(OPLOCK, "smb2_allocate_rsp_buf failed! "); 770 goto out; 771 } 772 773 rsp_hdr = smb_get_msg(work->response_buf); 774 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 775 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 776 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 777 rsp_hdr->CreditRequest = cpu_to_le16(0); 778 rsp_hdr->Command = SMB2_OPLOCK_BREAK; 779 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 780 rsp_hdr->NextCommand = 0; 781 rsp_hdr->MessageId = cpu_to_le64(-1); 782 rsp_hdr->Id.SyncId.ProcessId = 0; 783 rsp_hdr->Id.SyncId.TreeId = 0; 784 rsp_hdr->SessionId = 0; 785 memset(rsp_hdr->Signature, 0, 16); 786 787 rsp = smb_get_msg(work->response_buf); 788 rsp->StructureSize = cpu_to_le16(44); 789 rsp->Epoch = br_info->epoch; 790 rsp->Flags = 0; 791 792 if (br_info->curr_state & (SMB2_LEASE_WRITE_CACHING_LE | 793 SMB2_LEASE_HANDLE_CACHING_LE)) 794 rsp->Flags = SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED; 795 796 memcpy(rsp->LeaseKey, br_info->lease_key, SMB2_LEASE_KEY_SIZE); 797 rsp->CurrentLeaseState = br_info->curr_state; 798 rsp->NewLeaseState = br_info->new_state; 799 rsp->BreakReason = 0; 800 rsp->AccessMaskHint = 0; 801 rsp->ShareMaskHint = 0; 802 803 if (ksmbd_iov_pin_rsp(work, (void *)rsp, 804 sizeof(struct smb2_lease_break))) 805 goto out; 806 807 ksmbd_conn_write(work); 808 809 out: 810 ksmbd_free_work_struct(work); 811 ksmbd_conn_r_count_dec(conn); 812 } 813 814 /** 815 * smb2_lease_break_noti() - break lease when a new client request 816 * write lease 817 * @opinfo: contains lease state information 818 * 819 * Return: 0 on success, otherwise error 820 */ 821 static int smb2_lease_break_noti(struct oplock_info *opinfo) 822 { 823 struct ksmbd_conn *conn; 824 struct ksmbd_work *work; 825 struct lease_break_info *br_info; 826 struct lease *lease = opinfo->o_lease; 827 828 conn = READ_ONCE(opinfo->conn); 829 if (!conn) 830 return 0; 831 832 work = ksmbd_alloc_work_struct(); 833 if (!work) 834 return -ENOMEM; 835 836 br_info = kmalloc_obj(struct lease_break_info, KSMBD_DEFAULT_GFP); 837 if (!br_info) { 838 ksmbd_free_work_struct(work); 839 return -ENOMEM; 840 } 841 842 br_info->curr_state = lease->state; 843 br_info->new_state = lease->new_state; 844 if (lease->version == 2) 845 br_info->epoch = cpu_to_le16(++lease->epoch); 846 else 847 br_info->epoch = 0; 848 memcpy(br_info->lease_key, lease->lease_key, SMB2_LEASE_KEY_SIZE); 849 850 work->request_buf = (char *)br_info; 851 work->conn = conn; 852 work->sess = opinfo->sess; 853 854 ksmbd_conn_r_count_inc(conn); 855 if (opinfo->op_state == OPLOCK_ACK_WAIT) { 856 INIT_WORK(&work->work, __smb2_lease_break_noti); 857 ksmbd_queue_work(work); 858 wait_for_break_ack(opinfo); 859 } else { 860 __smb2_lease_break_noti(&work->work); 861 if (opinfo->o_lease->new_state == SMB2_LEASE_NONE_LE) { 862 opinfo->level = SMB2_OPLOCK_LEVEL_NONE; 863 opinfo->o_lease->state = SMB2_LEASE_NONE_LE; 864 } 865 } 866 return 0; 867 } 868 869 static void wait_lease_breaking(struct oplock_info *opinfo) 870 { 871 if (!opinfo->is_lease) 872 return; 873 874 wake_up_interruptible_all(&opinfo->oplock_brk); 875 if (atomic_read(&opinfo->breaking_cnt)) { 876 int ret = 0; 877 878 ret = wait_event_interruptible_timeout(opinfo->oplock_brk, 879 atomic_read(&opinfo->breaking_cnt) == 0, 880 HZ); 881 if (!ret) 882 atomic_set(&opinfo->breaking_cnt, 0); 883 } 884 } 885 886 static int oplock_break(struct oplock_info *brk_opinfo, int req_op_level, 887 struct ksmbd_work *in_work) 888 { 889 int err = 0; 890 891 /* Need to break exclusive/batch oplock, write lease or overwrite_if */ 892 ksmbd_debug(OPLOCK, 893 "request to send oplock(level : 0x%x) break notification\n", 894 brk_opinfo->level); 895 896 if (brk_opinfo->is_lease) { 897 struct lease *lease = brk_opinfo->o_lease; 898 899 atomic_inc(&brk_opinfo->breaking_cnt); 900 err = oplock_break_pending(brk_opinfo, req_op_level); 901 if (err) 902 return err < 0 ? err : 0; 903 904 if (brk_opinfo->open_trunc) { 905 /* 906 * Create overwrite break trigger the lease break to 907 * none. 908 */ 909 lease->new_state = SMB2_LEASE_NONE_LE; 910 } else { 911 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) { 912 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE) 913 lease->new_state = 914 SMB2_LEASE_READ_CACHING_LE | 915 SMB2_LEASE_HANDLE_CACHING_LE; 916 else 917 lease->new_state = 918 SMB2_LEASE_READ_CACHING_LE; 919 } else { 920 if (lease->state & SMB2_LEASE_HANDLE_CACHING_LE && 921 !lease->is_dir) 922 lease->new_state = 923 SMB2_LEASE_READ_CACHING_LE; 924 else 925 lease->new_state = SMB2_LEASE_NONE_LE; 926 } 927 } 928 929 if (lease->state & (SMB2_LEASE_WRITE_CACHING_LE | 930 SMB2_LEASE_HANDLE_CACHING_LE)) { 931 if (in_work) { 932 setup_async_work(in_work, NULL, NULL); 933 smb2_send_interim_resp(in_work, STATUS_PENDING); 934 release_async_work(in_work); 935 } 936 937 brk_opinfo->op_state = OPLOCK_ACK_WAIT; 938 } else 939 atomic_dec(&brk_opinfo->breaking_cnt); 940 } else { 941 err = oplock_break_pending(brk_opinfo, req_op_level); 942 if (err) 943 return err < 0 ? err : 0; 944 945 if (brk_opinfo->level == SMB2_OPLOCK_LEVEL_BATCH || 946 brk_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 947 brk_opinfo->op_state = OPLOCK_ACK_WAIT; 948 } 949 950 if (brk_opinfo->is_lease) 951 err = smb2_lease_break_noti(brk_opinfo); 952 else 953 err = smb2_oplock_break_noti(brk_opinfo); 954 955 ksmbd_debug(OPLOCK, "oplock granted = %d\n", brk_opinfo->level); 956 if (brk_opinfo->op_state == OPLOCK_CLOSING) 957 err = -ENOENT; 958 wake_up_oplock_break(brk_opinfo); 959 960 wait_lease_breaking(brk_opinfo); 961 962 return err; 963 } 964 965 void destroy_lease_table(struct ksmbd_conn *conn) 966 { 967 struct lease_table *lb, *lbtmp; 968 struct oplock_info *opinfo; 969 970 write_lock(&lease_list_lock); 971 if (list_empty(&lease_table_list)) { 972 write_unlock(&lease_list_lock); 973 return; 974 } 975 976 list_for_each_entry_safe(lb, lbtmp, &lease_table_list, l_entry) { 977 if (conn && memcmp(lb->client_guid, conn->ClientGUID, 978 SMB2_CLIENT_GUID_SIZE)) 979 continue; 980 again: 981 rcu_read_lock(); 982 list_for_each_entry_rcu(opinfo, &lb->lease_list, 983 lease_entry) { 984 rcu_read_unlock(); 985 lease_del_list(opinfo); 986 goto again; 987 } 988 rcu_read_unlock(); 989 list_del(&lb->l_entry); 990 kfree(lb); 991 } 992 write_unlock(&lease_list_lock); 993 } 994 995 int find_same_lease_key(struct ksmbd_session *sess, struct ksmbd_inode *ci, 996 struct lease_ctx_info *lctx) 997 { 998 struct oplock_info *opinfo; 999 int err = 0; 1000 struct lease_table *lb; 1001 1002 if (!lctx) 1003 return err; 1004 1005 read_lock(&lease_list_lock); 1006 if (list_empty(&lease_table_list)) { 1007 read_unlock(&lease_list_lock); 1008 return 0; 1009 } 1010 1011 list_for_each_entry(lb, &lease_table_list, l_entry) { 1012 if (!memcmp(lb->client_guid, sess->ClientGUID, 1013 SMB2_CLIENT_GUID_SIZE)) 1014 goto found; 1015 } 1016 read_unlock(&lease_list_lock); 1017 1018 return 0; 1019 1020 found: 1021 rcu_read_lock(); 1022 list_for_each_entry_rcu(opinfo, &lb->lease_list, lease_entry) { 1023 if (!atomic_inc_not_zero(&opinfo->refcount)) 1024 continue; 1025 rcu_read_unlock(); 1026 if (opinfo->o_fp->f_ci == ci) 1027 goto op_next; 1028 err = compare_guid_key(opinfo, sess->ClientGUID, 1029 lctx->lease_key); 1030 if (err) { 1031 err = -EINVAL; 1032 ksmbd_debug(OPLOCK, 1033 "found same lease key is already used in other files\n"); 1034 opinfo_put(opinfo); 1035 goto out; 1036 } 1037 op_next: 1038 opinfo_put(opinfo); 1039 rcu_read_lock(); 1040 } 1041 rcu_read_unlock(); 1042 1043 out: 1044 read_unlock(&lease_list_lock); 1045 return err; 1046 } 1047 1048 static void copy_lease(struct oplock_info *op1, struct oplock_info *op2) 1049 { 1050 struct lease *lease1 = op1->o_lease; 1051 struct lease *lease2 = op2->o_lease; 1052 1053 op2->level = op1->level; 1054 lease2->state = lease1->state; 1055 memcpy(lease2->lease_key, lease1->lease_key, 1056 SMB2_LEASE_KEY_SIZE); 1057 lease2->duration = lease1->duration; 1058 lease2->flags = lease1->flags; 1059 lease2->epoch = lease1->epoch; 1060 lease2->version = lease1->version; 1061 } 1062 1063 static void add_lease_global_list(struct oplock_info *opinfo, 1064 struct lease_table *new_lb) 1065 { 1066 struct lease_table *lb; 1067 1068 write_lock(&lease_list_lock); 1069 list_for_each_entry(lb, &lease_table_list, l_entry) { 1070 if (!memcmp(lb->client_guid, opinfo->conn->ClientGUID, 1071 SMB2_CLIENT_GUID_SIZE)) { 1072 opinfo->o_lease->l_lb = lb; 1073 lease_add_list(opinfo); 1074 write_unlock(&lease_list_lock); 1075 kfree(new_lb); 1076 return; 1077 } 1078 } 1079 1080 opinfo->o_lease->l_lb = new_lb; 1081 lease_add_list(opinfo); 1082 list_add(&new_lb->l_entry, &lease_table_list); 1083 write_unlock(&lease_list_lock); 1084 } 1085 1086 static void set_oplock_level(struct oplock_info *opinfo, int level, 1087 struct lease_ctx_info *lctx) 1088 { 1089 switch (level) { 1090 case SMB2_OPLOCK_LEVEL_BATCH: 1091 case SMB2_OPLOCK_LEVEL_EXCLUSIVE: 1092 grant_write_oplock(opinfo, level, lctx); 1093 break; 1094 case SMB2_OPLOCK_LEVEL_II: 1095 grant_read_oplock(opinfo, lctx); 1096 break; 1097 default: 1098 grant_none_oplock(opinfo, lctx); 1099 break; 1100 } 1101 } 1102 1103 void smb_send_parent_lease_break_noti(struct ksmbd_file *fp, 1104 struct lease_ctx_info *lctx) 1105 { 1106 struct oplock_info *opinfo; 1107 struct ksmbd_inode *p_ci = NULL; 1108 1109 if (lctx->version != 2) 1110 return; 1111 1112 p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent); 1113 if (!p_ci) 1114 return; 1115 1116 down_read(&p_ci->m_lock); 1117 list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) { 1118 if (opinfo->conn == NULL || !opinfo->is_lease) 1119 continue; 1120 1121 if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE && 1122 (!(lctx->flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) || 1123 !compare_guid_key(opinfo, fp->conn->ClientGUID, 1124 lctx->parent_lease_key))) { 1125 if (!atomic_inc_not_zero(&opinfo->refcount)) 1126 continue; 1127 1128 if (ksmbd_conn_releasing(opinfo->conn)) { 1129 opinfo_put(opinfo); 1130 continue; 1131 } 1132 1133 oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE, NULL); 1134 opinfo_put(opinfo); 1135 } 1136 } 1137 up_read(&p_ci->m_lock); 1138 1139 ksmbd_inode_put(p_ci); 1140 } 1141 1142 void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp) 1143 { 1144 struct oplock_info *opinfo; 1145 struct ksmbd_inode *p_ci = NULL; 1146 1147 rcu_read_lock(); 1148 opinfo = rcu_dereference(fp->f_opinfo); 1149 1150 if (!opinfo || !opinfo->is_lease || opinfo->o_lease->version != 2) { 1151 rcu_read_unlock(); 1152 return; 1153 } 1154 rcu_read_unlock(); 1155 1156 p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent); 1157 if (!p_ci) 1158 return; 1159 1160 down_read(&p_ci->m_lock); 1161 list_for_each_entry(opinfo, &p_ci->m_op_list, op_entry) { 1162 if (opinfo->conn == NULL || !opinfo->is_lease) 1163 continue; 1164 1165 if (opinfo->o_lease->state != SMB2_OPLOCK_LEVEL_NONE) { 1166 if (!atomic_inc_not_zero(&opinfo->refcount)) 1167 continue; 1168 1169 if (ksmbd_conn_releasing(opinfo->conn)) { 1170 opinfo_put(opinfo); 1171 continue; 1172 } 1173 1174 oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE, NULL); 1175 opinfo_put(opinfo); 1176 } 1177 } 1178 up_read(&p_ci->m_lock); 1179 1180 ksmbd_inode_put(p_ci); 1181 } 1182 1183 /** 1184 * smb_grant_oplock() - handle oplock/lease request on file open 1185 * @work: smb work 1186 * @req_op_level: oplock level 1187 * @pid: id of open file 1188 * @fp: ksmbd file pointer 1189 * @tid: Tree id of connection 1190 * @lctx: lease context information on file open 1191 * @share_ret: share mode 1192 * 1193 * Return: 0 on success, otherwise error 1194 */ 1195 int smb_grant_oplock(struct ksmbd_work *work, int req_op_level, u64 pid, 1196 struct ksmbd_file *fp, __u16 tid, 1197 struct lease_ctx_info *lctx, int share_ret) 1198 { 1199 struct ksmbd_session *sess = work->sess; 1200 int err = 0; 1201 struct oplock_info *opinfo = NULL, *prev_opinfo = NULL; 1202 struct ksmbd_inode *ci = fp->f_ci; 1203 struct lease_table *new_lb = NULL; 1204 bool prev_op_has_lease; 1205 __le32 prev_op_state = 0; 1206 1207 /* Only v2 leases handle the directory */ 1208 if (S_ISDIR(file_inode(fp->filp)->i_mode)) { 1209 if (!lctx || lctx->version != 2 || 1210 (lctx->flags != SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE && 1211 !lctx->epoch)) 1212 return 0; 1213 } 1214 1215 opinfo = alloc_opinfo(work, pid, tid); 1216 if (!opinfo) 1217 return -ENOMEM; 1218 1219 if (lctx) { 1220 err = alloc_lease(opinfo, lctx); 1221 if (err) 1222 goto err_out; 1223 opinfo->is_lease = 1; 1224 } 1225 1226 /* ci does not have any oplock */ 1227 if (!opinfo_count(fp)) 1228 goto set_lev; 1229 1230 /* grant none-oplock if second open is trunc */ 1231 if (fp->attrib_only && fp->cdoption != FILE_OVERWRITE_IF_LE && 1232 fp->cdoption != FILE_OVERWRITE_LE && 1233 fp->cdoption != FILE_SUPERSEDE_LE) { 1234 req_op_level = SMB2_OPLOCK_LEVEL_NONE; 1235 goto set_lev; 1236 } 1237 1238 if (lctx) { 1239 struct oplock_info *m_opinfo; 1240 1241 /* is lease already granted ? */ 1242 m_opinfo = same_client_has_lease(ci, sess->ClientGUID, 1243 lctx); 1244 if (m_opinfo) { 1245 copy_lease(m_opinfo, opinfo); 1246 if (atomic_read(&m_opinfo->breaking_cnt)) 1247 opinfo->o_lease->flags = 1248 SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE; 1249 goto out; 1250 } 1251 } 1252 prev_opinfo = opinfo_get_list(ci); 1253 if (!prev_opinfo || 1254 (prev_opinfo->level == SMB2_OPLOCK_LEVEL_NONE && lctx)) { 1255 opinfo_put(prev_opinfo); 1256 goto set_lev; 1257 } 1258 prev_op_has_lease = prev_opinfo->is_lease; 1259 if (prev_op_has_lease) 1260 prev_op_state = prev_opinfo->o_lease->state; 1261 1262 if (share_ret < 0 && 1263 prev_opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 1264 err = share_ret; 1265 opinfo_put(prev_opinfo); 1266 goto err_out; 1267 } 1268 1269 if (prev_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH && 1270 prev_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 1271 opinfo_put(prev_opinfo); 1272 goto op_break_not_needed; 1273 } 1274 1275 err = oplock_break(prev_opinfo, SMB2_OPLOCK_LEVEL_II, work); 1276 opinfo_put(prev_opinfo); 1277 if (err == -ENOENT) 1278 goto set_lev; 1279 /* Check all oplock was freed by close */ 1280 else if (err < 0) 1281 goto err_out; 1282 1283 op_break_not_needed: 1284 if (share_ret < 0) { 1285 err = share_ret; 1286 goto err_out; 1287 } 1288 1289 if (req_op_level != SMB2_OPLOCK_LEVEL_NONE) 1290 req_op_level = SMB2_OPLOCK_LEVEL_II; 1291 1292 /* grant fixed oplock on stacked locking between lease and oplock */ 1293 if (prev_op_has_lease && !lctx) 1294 if (prev_op_state & SMB2_LEASE_HANDLE_CACHING_LE) 1295 req_op_level = SMB2_OPLOCK_LEVEL_NONE; 1296 1297 if (!prev_op_has_lease && lctx) { 1298 req_op_level = SMB2_OPLOCK_LEVEL_II; 1299 lctx->req_state = SMB2_LEASE_READ_CACHING_LE; 1300 } 1301 1302 set_lev: 1303 set_oplock_level(opinfo, req_op_level, lctx); 1304 1305 out: 1306 /* 1307 * Set o_fp before any publication so that concurrent readers 1308 * (e.g. find_same_lease_key() on the lease list) that 1309 * dereference opinfo->o_fp don't hit a NULL pointer. 1310 * 1311 * Keep the original publication order so concurrent opens can 1312 * still observe the in-flight grant via ci->m_op_list, but make 1313 * everything after opinfo_add() no-fail by preallocating any new 1314 * lease_table first. 1315 */ 1316 opinfo->o_fp = fp; 1317 if (opinfo->is_lease) { 1318 new_lb = alloc_lease_table(opinfo); 1319 if (!new_lb) { 1320 err = -ENOMEM; 1321 goto err_out; 1322 } 1323 } 1324 1325 opinfo_count_inc(fp); 1326 opinfo_add(opinfo, fp); 1327 1328 if (opinfo->is_lease) 1329 add_lease_global_list(opinfo, new_lb); 1330 1331 rcu_assign_pointer(fp->f_opinfo, opinfo); 1332 1333 return 0; 1334 err_out: 1335 kfree(new_lb); 1336 opinfo_put(opinfo); 1337 return err; 1338 } 1339 1340 /** 1341 * smb_break_all_write_oplock() - break batch/exclusive oplock to level2 1342 * @work: smb work 1343 * @fp: ksmbd file pointer 1344 * @is_trunc: truncate on open 1345 */ 1346 static void smb_break_all_write_oplock(struct ksmbd_work *work, 1347 struct ksmbd_file *fp, int is_trunc) 1348 { 1349 struct oplock_info *brk_opinfo; 1350 1351 brk_opinfo = opinfo_get_list(fp->f_ci); 1352 if (!brk_opinfo) 1353 return; 1354 if (brk_opinfo->level != SMB2_OPLOCK_LEVEL_BATCH && 1355 brk_opinfo->level != SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 1356 opinfo_put(brk_opinfo); 1357 return; 1358 } 1359 1360 brk_opinfo->open_trunc = is_trunc; 1361 oplock_break(brk_opinfo, SMB2_OPLOCK_LEVEL_II, work); 1362 opinfo_put(brk_opinfo); 1363 } 1364 1365 /** 1366 * smb_break_all_levII_oplock() - send level2 oplock or read lease break command 1367 * from server to client 1368 * @work: smb work 1369 * @fp: ksmbd file pointer 1370 * @is_trunc: truncate on open 1371 */ 1372 void smb_break_all_levII_oplock(struct ksmbd_work *work, struct ksmbd_file *fp, 1373 int is_trunc) 1374 { 1375 struct oplock_info *op, *brk_op; 1376 struct ksmbd_inode *ci; 1377 struct ksmbd_conn *conn = work->conn; 1378 1379 if (!test_share_config_flag(work->tcon->share_conf, 1380 KSMBD_SHARE_FLAG_OPLOCKS)) 1381 return; 1382 1383 ci = fp->f_ci; 1384 op = opinfo_get(fp); 1385 1386 down_read(&ci->m_lock); 1387 list_for_each_entry(brk_op, &ci->m_op_list, op_entry) { 1388 if (brk_op->conn == NULL) 1389 continue; 1390 1391 if (!atomic_inc_not_zero(&brk_op->refcount)) 1392 continue; 1393 1394 if (ksmbd_conn_releasing(brk_op->conn)) { 1395 opinfo_put(brk_op); 1396 continue; 1397 } 1398 1399 if (brk_op->is_lease && (brk_op->o_lease->state & 1400 (~(SMB2_LEASE_READ_CACHING_LE | 1401 SMB2_LEASE_HANDLE_CACHING_LE)))) { 1402 ksmbd_debug(OPLOCK, "unexpected lease state(0x%x)\n", 1403 brk_op->o_lease->state); 1404 goto next; 1405 } else if (brk_op->level != 1406 SMB2_OPLOCK_LEVEL_II) { 1407 ksmbd_debug(OPLOCK, "unexpected oplock(0x%x)\n", 1408 brk_op->level); 1409 goto next; 1410 } 1411 1412 /* Skip oplock being break to none */ 1413 if (brk_op->is_lease && 1414 brk_op->o_lease->new_state == SMB2_LEASE_NONE_LE && 1415 atomic_read(&brk_op->breaking_cnt)) 1416 goto next; 1417 1418 if (op && op->is_lease && brk_op->is_lease && 1419 !memcmp(conn->ClientGUID, brk_op->conn->ClientGUID, 1420 SMB2_CLIENT_GUID_SIZE) && 1421 !memcmp(op->o_lease->lease_key, brk_op->o_lease->lease_key, 1422 SMB2_LEASE_KEY_SIZE)) 1423 goto next; 1424 brk_op->open_trunc = is_trunc; 1425 oplock_break(brk_op, SMB2_OPLOCK_LEVEL_NONE, NULL); 1426 next: 1427 opinfo_put(brk_op); 1428 } 1429 up_read(&ci->m_lock); 1430 1431 if (op) 1432 opinfo_put(op); 1433 } 1434 1435 /** 1436 * smb_break_all_oplock() - break both batch/exclusive and level2 oplock 1437 * @work: smb work 1438 * @fp: ksmbd file pointer 1439 */ 1440 void smb_break_all_oplock(struct ksmbd_work *work, struct ksmbd_file *fp) 1441 { 1442 if (!test_share_config_flag(work->tcon->share_conf, 1443 KSMBD_SHARE_FLAG_OPLOCKS)) 1444 return; 1445 1446 smb_break_all_write_oplock(work, fp, 1); 1447 smb_break_all_levII_oplock(work, fp, 1); 1448 } 1449 1450 /** 1451 * smb2_map_lease_to_oplock() - map lease state to corresponding oplock type 1452 * @lease_state: lease type 1453 * 1454 * Return: 0 if no mapping, otherwise corresponding oplock type 1455 */ 1456 __u8 smb2_map_lease_to_oplock(__le32 lease_state) 1457 { 1458 if (lease_state == (SMB2_LEASE_HANDLE_CACHING_LE | 1459 SMB2_LEASE_READ_CACHING_LE | 1460 SMB2_LEASE_WRITE_CACHING_LE)) { 1461 return SMB2_OPLOCK_LEVEL_BATCH; 1462 } else if (lease_state != SMB2_LEASE_WRITE_CACHING_LE && 1463 lease_state & SMB2_LEASE_WRITE_CACHING_LE) { 1464 if (!(lease_state & SMB2_LEASE_HANDLE_CACHING_LE)) 1465 return SMB2_OPLOCK_LEVEL_EXCLUSIVE; 1466 } else if (lease_state & SMB2_LEASE_READ_CACHING_LE) { 1467 return SMB2_OPLOCK_LEVEL_II; 1468 } 1469 return 0; 1470 } 1471 1472 /** 1473 * create_lease_buf() - create lease context for open cmd response 1474 * @rbuf: buffer to create lease context response 1475 * @lease: buffer to stored parsed lease state information 1476 */ 1477 void create_lease_buf(u8 *rbuf, struct lease *lease) 1478 { 1479 if (lease->version == 2) { 1480 struct create_lease_v2 *buf = (struct create_lease_v2 *)rbuf; 1481 1482 memset(buf, 0, sizeof(struct create_lease_v2)); 1483 memcpy(buf->lcontext.LeaseKey, lease->lease_key, 1484 SMB2_LEASE_KEY_SIZE); 1485 buf->lcontext.LeaseFlags = lease->flags; 1486 buf->lcontext.Epoch = cpu_to_le16(lease->epoch); 1487 buf->lcontext.LeaseState = lease->state; 1488 if (lease->flags == SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 1489 memcpy(buf->lcontext.ParentLeaseKey, lease->parent_lease_key, 1490 SMB2_LEASE_KEY_SIZE); 1491 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1492 (struct create_lease_v2, lcontext)); 1493 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 1494 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1495 (struct create_lease_v2, Name)); 1496 buf->ccontext.NameLength = cpu_to_le16(4); 1497 buf->Name[0] = 'R'; 1498 buf->Name[1] = 'q'; 1499 buf->Name[2] = 'L'; 1500 buf->Name[3] = 's'; 1501 } else { 1502 struct create_lease *buf = (struct create_lease *)rbuf; 1503 1504 memset(buf, 0, sizeof(struct create_lease)); 1505 memcpy(buf->lcontext.LeaseKey, lease->lease_key, SMB2_LEASE_KEY_SIZE); 1506 buf->lcontext.LeaseFlags = lease->flags; 1507 buf->lcontext.LeaseState = lease->state; 1508 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1509 (struct create_lease, lcontext)); 1510 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 1511 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1512 (struct create_lease, Name)); 1513 buf->ccontext.NameLength = cpu_to_le16(4); 1514 buf->Name[0] = 'R'; 1515 buf->Name[1] = 'q'; 1516 buf->Name[2] = 'L'; 1517 buf->Name[3] = 's'; 1518 } 1519 } 1520 1521 /** 1522 * parse_lease_state() - parse lease context contained in file open request 1523 * @open_req: buffer containing smb2 file open(create) request 1524 * 1525 * Return: allocated lease context object on success, otherwise NULL 1526 */ 1527 struct lease_ctx_info *parse_lease_state(void *open_req) 1528 { 1529 struct create_context *cc; 1530 struct smb2_create_req *req = (struct smb2_create_req *)open_req; 1531 struct lease_ctx_info *lreq; 1532 1533 cc = smb2_find_context_vals(req, SMB2_CREATE_REQUEST_LEASE, 4); 1534 if (IS_ERR_OR_NULL(cc)) 1535 return NULL; 1536 1537 lreq = kzalloc_obj(struct lease_ctx_info, KSMBD_DEFAULT_GFP); 1538 if (!lreq) 1539 return NULL; 1540 1541 if (sizeof(struct lease_context_v2) == le32_to_cpu(cc->DataLength)) { 1542 struct create_lease_v2 *lc = (struct create_lease_v2 *)cc; 1543 1544 if (le16_to_cpu(cc->DataOffset) + le32_to_cpu(cc->DataLength) < 1545 sizeof(struct create_lease_v2) - 4) 1546 goto err_out; 1547 1548 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 1549 lreq->req_state = lc->lcontext.LeaseState; 1550 lreq->flags = lc->lcontext.LeaseFlags; 1551 lreq->epoch = lc->lcontext.Epoch; 1552 lreq->duration = lc->lcontext.LeaseDuration; 1553 if (lreq->flags == SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 1554 memcpy(lreq->parent_lease_key, lc->lcontext.ParentLeaseKey, 1555 SMB2_LEASE_KEY_SIZE); 1556 lreq->version = 2; 1557 } else { 1558 struct create_lease *lc = (struct create_lease *)cc; 1559 1560 if (le16_to_cpu(cc->DataOffset) + le32_to_cpu(cc->DataLength) < 1561 sizeof(struct create_lease)) 1562 goto err_out; 1563 1564 memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 1565 lreq->req_state = lc->lcontext.LeaseState; 1566 lreq->flags = lc->lcontext.LeaseFlags; 1567 lreq->duration = lc->lcontext.LeaseDuration; 1568 lreq->version = 1; 1569 } 1570 return lreq; 1571 err_out: 1572 kfree(lreq); 1573 return NULL; 1574 } 1575 1576 /** 1577 * smb2_find_context_vals() - find a particular context info in open request 1578 * @open_req: buffer containing smb2 file open(create) request 1579 * @tag: context name to search for 1580 * @tag_len: the length of tag 1581 * 1582 * Return: pointer to requested context, NULL if @str context not found 1583 * or error pointer if name length is invalid. 1584 */ 1585 struct create_context *smb2_find_context_vals(void *open_req, const char *tag, int tag_len) 1586 { 1587 struct create_context *cc; 1588 unsigned int next = 0; 1589 char *name; 1590 struct smb2_create_req *req = (struct smb2_create_req *)open_req; 1591 unsigned int remain_len, name_off, name_len, value_off, value_len, 1592 cc_len; 1593 1594 /* 1595 * CreateContextsOffset and CreateContextsLength are guaranteed to 1596 * be valid because of ksmbd_smb2_check_message(). 1597 */ 1598 cc = (struct create_context *)((char *)req + 1599 le32_to_cpu(req->CreateContextsOffset)); 1600 remain_len = le32_to_cpu(req->CreateContextsLength); 1601 do { 1602 cc = (struct create_context *)((char *)cc + next); 1603 if (remain_len < offsetof(struct create_context, Buffer)) 1604 return ERR_PTR(-EINVAL); 1605 1606 next = le32_to_cpu(cc->Next); 1607 name_off = le16_to_cpu(cc->NameOffset); 1608 name_len = le16_to_cpu(cc->NameLength); 1609 value_off = le16_to_cpu(cc->DataOffset); 1610 value_len = le32_to_cpu(cc->DataLength); 1611 cc_len = next ? next : remain_len; 1612 1613 if ((next & 0x7) != 0 || 1614 next > remain_len || 1615 name_off != offsetof(struct create_context, Buffer) || 1616 name_len < 4 || 1617 name_off + name_len > cc_len || 1618 (value_off & 0x7) != 0 || 1619 (value_len && value_off < name_off + (name_len < 8 ? 8 : name_len)) || 1620 ((u64)value_off + value_len > cc_len)) 1621 return ERR_PTR(-EINVAL); 1622 1623 name = (char *)cc + name_off; 1624 if (name_len == tag_len && !memcmp(name, tag, name_len)) 1625 return cc; 1626 1627 remain_len -= next; 1628 } while (next != 0); 1629 1630 return NULL; 1631 } 1632 1633 /** 1634 * create_durable_rsp_buf() - create durable handle context 1635 * @cc: buffer to create durable context response 1636 */ 1637 void create_durable_rsp_buf(char *cc) 1638 { 1639 struct create_durable_rsp *buf; 1640 1641 buf = (struct create_durable_rsp *)cc; 1642 memset(buf, 0, sizeof(struct create_durable_rsp)); 1643 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1644 (struct create_durable_rsp, Data)); 1645 buf->ccontext.DataLength = cpu_to_le32(8); 1646 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1647 (struct create_durable_rsp, Name)); 1648 buf->ccontext.NameLength = cpu_to_le16(4); 1649 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE is "DHnQ" */ 1650 buf->Name[0] = 'D'; 1651 buf->Name[1] = 'H'; 1652 buf->Name[2] = 'n'; 1653 buf->Name[3] = 'Q'; 1654 } 1655 1656 /** 1657 * create_durable_v2_rsp_buf() - create durable handle v2 context 1658 * @cc: buffer to create durable context response 1659 * @fp: ksmbd file pointer 1660 */ 1661 void create_durable_v2_rsp_buf(char *cc, struct ksmbd_file *fp) 1662 { 1663 struct create_durable_rsp_v2 *buf; 1664 1665 buf = (struct create_durable_rsp_v2 *)cc; 1666 memset(buf, 0, sizeof(struct create_durable_rsp)); 1667 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1668 (struct create_durable_rsp, Data)); 1669 buf->ccontext.DataLength = cpu_to_le32(8); 1670 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1671 (struct create_durable_rsp, Name)); 1672 buf->ccontext.NameLength = cpu_to_le16(4); 1673 /* SMB2_CREATE_DURABLE_HANDLE_RESPONSE_V2 is "DH2Q" */ 1674 buf->Name[0] = 'D'; 1675 buf->Name[1] = 'H'; 1676 buf->Name[2] = '2'; 1677 buf->Name[3] = 'Q'; 1678 1679 buf->dcontext.Timeout = cpu_to_le32(fp->durable_timeout); 1680 if (fp->is_persistent) 1681 buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 1682 } 1683 1684 /** 1685 * create_mxac_rsp_buf() - create query maximal access context 1686 * @cc: buffer to create maximal access context response 1687 * @maximal_access: maximal access 1688 */ 1689 void create_mxac_rsp_buf(char *cc, int maximal_access) 1690 { 1691 struct create_mxac_rsp *buf; 1692 1693 buf = (struct create_mxac_rsp *)cc; 1694 memset(buf, 0, sizeof(struct create_mxac_rsp)); 1695 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1696 (struct create_mxac_rsp, QueryStatus)); 1697 buf->ccontext.DataLength = cpu_to_le32(8); 1698 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1699 (struct create_mxac_rsp, Name)); 1700 buf->ccontext.NameLength = cpu_to_le16(4); 1701 /* SMB2_CREATE_QUERY_MAXIMAL_ACCESS_RESPONSE is "MxAc" */ 1702 buf->Name[0] = 'M'; 1703 buf->Name[1] = 'x'; 1704 buf->Name[2] = 'A'; 1705 buf->Name[3] = 'c'; 1706 1707 buf->QueryStatus = STATUS_SUCCESS; 1708 buf->MaximalAccess = cpu_to_le32(maximal_access); 1709 } 1710 1711 void create_disk_id_rsp_buf(char *cc, __u64 file_id, __u64 vol_id) 1712 { 1713 struct create_disk_id_rsp *buf; 1714 1715 buf = (struct create_disk_id_rsp *)cc; 1716 memset(buf, 0, sizeof(struct create_disk_id_rsp)); 1717 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1718 (struct create_disk_id_rsp, DiskFileId)); 1719 buf->ccontext.DataLength = cpu_to_le32(32); 1720 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1721 (struct create_mxac_rsp, Name)); 1722 buf->ccontext.NameLength = cpu_to_le16(4); 1723 /* SMB2_CREATE_QUERY_ON_DISK_ID_RESPONSE is "QFid" */ 1724 buf->Name[0] = 'Q'; 1725 buf->Name[1] = 'F'; 1726 buf->Name[2] = 'i'; 1727 buf->Name[3] = 'd'; 1728 1729 buf->DiskFileId = cpu_to_le64(file_id); 1730 buf->VolumeId = cpu_to_le64(vol_id); 1731 } 1732 1733 /** 1734 * create_posix_rsp_buf() - create posix extension context 1735 * @cc: buffer to create posix on posix response 1736 * @fp: ksmbd file pointer 1737 */ 1738 void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp) 1739 { 1740 struct create_posix_rsp *buf; 1741 struct inode *inode = file_inode(fp->filp); 1742 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 1743 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 1744 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 1745 1746 buf = (struct create_posix_rsp *)cc; 1747 memset(buf, 0, sizeof(struct create_posix_rsp)); 1748 buf->ccontext.DataOffset = cpu_to_le16(offsetof 1749 (struct create_posix_rsp, nlink)); 1750 /* 1751 * DataLength = nlink(4) + reparse_tag(4) + mode(4) + 1752 * domain sid(28) + unix group sid(16). 1753 */ 1754 buf->ccontext.DataLength = cpu_to_le32(56); 1755 buf->ccontext.NameOffset = cpu_to_le16(offsetof 1756 (struct create_posix_rsp, Name)); 1757 buf->ccontext.NameLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 1758 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 1759 buf->Name[0] = 0x93; 1760 buf->Name[1] = 0xAD; 1761 buf->Name[2] = 0x25; 1762 buf->Name[3] = 0x50; 1763 buf->Name[4] = 0x9C; 1764 buf->Name[5] = 0xB4; 1765 buf->Name[6] = 0x11; 1766 buf->Name[7] = 0xE7; 1767 buf->Name[8] = 0xB4; 1768 buf->Name[9] = 0x23; 1769 buf->Name[10] = 0x83; 1770 buf->Name[11] = 0xDE; 1771 buf->Name[12] = 0x96; 1772 buf->Name[13] = 0x8B; 1773 buf->Name[14] = 0xCD; 1774 buf->Name[15] = 0x7C; 1775 1776 buf->nlink = cpu_to_le32(inode->i_nlink); 1777 buf->reparse_tag = cpu_to_le32(fp->volatile_id); 1778 buf->mode = cpu_to_le32(inode->i_mode & 0777); 1779 /* 1780 * SidBuffer(44) contain two sids(Domain sid(28), UNIX group sid(16)). 1781 * Domain sid(28) = revision(1) + num_subauth(1) + authority(6) + 1782 * sub_auth(4 * 4(num_subauth)) + RID(4). 1783 * UNIX group id(16) = revision(1) + num_subauth(1) + authority(6) + 1784 * sub_auth(4 * 1(num_subauth)) + RID(4). 1785 */ 1786 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 1787 SIDOWNER, (struct smb_sid *)&buf->SidBuffer[0]); 1788 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 1789 SIDUNIX_GROUP, (struct smb_sid *)&buf->SidBuffer[28]); 1790 } 1791 1792 /* 1793 * Find lease object(opinfo) for given lease key/fid from lease 1794 * break/file close path. 1795 */ 1796 /** 1797 * lookup_lease_in_table() - find a matching lease info object 1798 * @conn: connection instance 1799 * @lease_key: lease key to be searched for 1800 * 1801 * Return: opinfo if found matching opinfo, otherwise NULL 1802 */ 1803 struct oplock_info *lookup_lease_in_table(struct ksmbd_conn *conn, 1804 char *lease_key) 1805 { 1806 struct oplock_info *opinfo = NULL, *ret_op = NULL; 1807 struct lease_table *lt; 1808 int ret; 1809 1810 read_lock(&lease_list_lock); 1811 list_for_each_entry(lt, &lease_table_list, l_entry) { 1812 if (!memcmp(lt->client_guid, conn->ClientGUID, 1813 SMB2_CLIENT_GUID_SIZE)) 1814 goto found; 1815 } 1816 1817 read_unlock(&lease_list_lock); 1818 return NULL; 1819 1820 found: 1821 rcu_read_lock(); 1822 list_for_each_entry_rcu(opinfo, <->lease_list, lease_entry) { 1823 if (!atomic_inc_not_zero(&opinfo->refcount)) 1824 continue; 1825 rcu_read_unlock(); 1826 if (!opinfo->op_state || opinfo->op_state == OPLOCK_CLOSING) 1827 goto op_next; 1828 if (!(opinfo->o_lease->state & 1829 (SMB2_LEASE_HANDLE_CACHING_LE | 1830 SMB2_LEASE_WRITE_CACHING_LE))) 1831 goto op_next; 1832 ret = compare_guid_key(opinfo, conn->ClientGUID, 1833 lease_key); 1834 if (ret) { 1835 ksmbd_debug(OPLOCK, "found opinfo\n"); 1836 ret_op = opinfo; 1837 goto out; 1838 } 1839 op_next: 1840 opinfo_put(opinfo); 1841 rcu_read_lock(); 1842 } 1843 rcu_read_unlock(); 1844 1845 out: 1846 read_unlock(&lease_list_lock); 1847 return ret_op; 1848 } 1849 1850 int smb2_check_durable_oplock(struct ksmbd_conn *conn, 1851 struct ksmbd_share_config *share, 1852 struct ksmbd_file *fp, 1853 struct lease_ctx_info *lctx, 1854 struct ksmbd_user *user, 1855 char *name) 1856 { 1857 struct oplock_info *opinfo = opinfo_get(fp); 1858 int ret = 0; 1859 1860 if (!opinfo) 1861 return 0; 1862 1863 if (ksmbd_vfs_compare_durable_owner(fp, user) == false) { 1864 ksmbd_debug(SMB, "Durable handle reconnect failed: owner mismatch\n"); 1865 ret = -EBADF; 1866 goto out; 1867 } 1868 1869 if (opinfo->is_lease == false) { 1870 if (lctx) { 1871 pr_err("create context include lease\n"); 1872 ret = -EBADF; 1873 goto out; 1874 } 1875 1876 if (opinfo->level != SMB2_OPLOCK_LEVEL_BATCH) { 1877 pr_err("oplock level is not equal to SMB2_OPLOCK_LEVEL_BATCH\n"); 1878 ret = -EBADF; 1879 } 1880 1881 goto out; 1882 } 1883 1884 if (memcmp(conn->ClientGUID, fp->client_guid, 1885 SMB2_CLIENT_GUID_SIZE)) { 1886 ksmbd_debug(SMB, "Client guid of fp is not equal to the one of connection\n"); 1887 ret = -EBADF; 1888 goto out; 1889 } 1890 1891 if (!lctx) { 1892 ksmbd_debug(SMB, "create context does not include lease\n"); 1893 ret = -EBADF; 1894 goto out; 1895 } 1896 1897 if (memcmp(opinfo->o_lease->lease_key, lctx->lease_key, 1898 SMB2_LEASE_KEY_SIZE)) { 1899 ksmbd_debug(SMB, 1900 "lease key of fp does not match lease key in create context\n"); 1901 ret = -EBADF; 1902 goto out; 1903 } 1904 1905 if (!(opinfo->o_lease->state & SMB2_LEASE_HANDLE_CACHING_LE)) { 1906 ksmbd_debug(SMB, "lease state does not contain SMB2_LEASE_HANDLE_CACHING\n"); 1907 ret = -EBADF; 1908 goto out; 1909 } 1910 1911 if (opinfo->o_lease->version != lctx->version) { 1912 ksmbd_debug(SMB, 1913 "lease version of fp does not match the one in create context\n"); 1914 ret = -EBADF; 1915 goto out; 1916 } 1917 1918 if (!ksmbd_inode_pending_delete(fp)) 1919 ret = ksmbd_validate_name_reconnect(share, fp, name); 1920 out: 1921 opinfo_put(opinfo); 1922 return ret; 1923 } 1924