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