1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <linux/folio_queue.h> 17 #include <uapi/linux/magic.h> 18 #include "cifsfs.h" 19 #include "cifsglob.h" 20 #include "smb2pdu.h" 21 #include "smb2proto.h" 22 #include "cifsproto.h" 23 #include "cifs_debug.h" 24 #include "cifs_unicode.h" 25 #include "../common/smb2status.h" 26 #include "smb2glob.h" 27 #include "cifs_ioctl.h" 28 #include "smbdirect.h" 29 #include "fscache.h" 30 #include "fs_context.h" 31 #include "cached_dir.h" 32 #include "reparse.h" 33 34 /* Change credits for different ops and return the total number of credits */ 35 static int 36 change_conf(struct TCP_Server_Info *server) 37 { 38 server->credits += server->echo_credits + server->oplock_credits; 39 if (server->credits > server->max_credits) 40 server->credits = server->max_credits; 41 server->oplock_credits = server->echo_credits = 0; 42 switch (server->credits) { 43 case 0: 44 return 0; 45 case 1: 46 server->echoes = false; 47 server->oplocks = false; 48 break; 49 case 2: 50 server->echoes = true; 51 server->oplocks = false; 52 server->echo_credits = 1; 53 break; 54 default: 55 server->echoes = true; 56 if (enable_oplocks) { 57 server->oplocks = true; 58 server->oplock_credits = 1; 59 } else 60 server->oplocks = false; 61 62 server->echo_credits = 1; 63 } 64 server->credits -= server->echo_credits + server->oplock_credits; 65 return server->credits + server->echo_credits + server->oplock_credits; 66 } 67 68 static void 69 smb2_add_credits(struct TCP_Server_Info *server, 70 struct cifs_credits *credits, const int optype) 71 { 72 int *val, rc = -1; 73 int scredits, in_flight; 74 unsigned int add = credits->value; 75 unsigned int instance = credits->instance; 76 bool reconnect_detected = false; 77 bool reconnect_with_invalid_credits = false; 78 79 spin_lock(&server->req_lock); 80 val = server->ops->get_credits_field(server, optype); 81 82 /* eg found case where write overlapping reconnect messed up credits */ 83 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 84 reconnect_with_invalid_credits = true; 85 86 if ((instance == 0) || (instance == server->reconnect_instance)) 87 *val += add; 88 else 89 reconnect_detected = true; 90 91 if (*val > 65000) { 92 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 93 pr_warn_once("server overflowed SMB3 credits\n"); 94 trace_smb3_overflow_credits(server->CurrentMid, 95 server->conn_id, server->hostname, *val, 96 add, server->in_flight); 97 } 98 if (credits->in_flight_check > 1) { 99 pr_warn_once("rreq R=%08x[%x] Credits not in flight\n", 100 credits->rreq_debug_id, credits->rreq_debug_index); 101 } else { 102 credits->in_flight_check = 2; 103 } 104 if (WARN_ON_ONCE(server->in_flight == 0)) { 105 pr_warn_once("rreq R=%08x[%x] Zero in_flight\n", 106 credits->rreq_debug_id, credits->rreq_debug_index); 107 trace_smb3_rw_credits(credits->rreq_debug_id, 108 credits->rreq_debug_index, 109 credits->value, 110 server->credits, server->in_flight, 0, 111 cifs_trace_rw_credits_zero_in_flight); 112 } 113 server->in_flight--; 114 if (server->in_flight == 0 && 115 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 116 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 117 rc = change_conf(server); 118 /* 119 * Sometimes server returns 0 credits on oplock break ack - we need to 120 * rebalance credits in this case. 121 */ 122 else if (server->in_flight > 0 && server->oplock_credits == 0 && 123 server->oplocks) { 124 if (server->credits > 1) { 125 server->credits--; 126 server->oplock_credits++; 127 } 128 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 129 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 130 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 131 change_conf(server); 132 133 scredits = *val; 134 in_flight = server->in_flight; 135 spin_unlock(&server->req_lock); 136 wake_up(&server->request_q); 137 138 if (reconnect_detected) { 139 trace_smb3_reconnect_detected(server->CurrentMid, 140 server->conn_id, server->hostname, scredits, add, in_flight); 141 142 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 143 add, instance); 144 } 145 146 if (reconnect_with_invalid_credits) { 147 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 148 server->conn_id, server->hostname, scredits, add, in_flight); 149 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 150 optype, scredits, add); 151 } 152 153 spin_lock(&server->srv_lock); 154 if (server->tcpStatus == CifsNeedReconnect 155 || server->tcpStatus == CifsExiting) { 156 spin_unlock(&server->srv_lock); 157 return; 158 } 159 spin_unlock(&server->srv_lock); 160 161 switch (rc) { 162 case -1: 163 /* change_conf hasn't been executed */ 164 break; 165 case 0: 166 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 167 break; 168 case 1: 169 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 170 break; 171 case 2: 172 cifs_dbg(FYI, "disabling oplocks\n"); 173 break; 174 default: 175 /* change_conf rebalanced credits for different types */ 176 break; 177 } 178 179 trace_smb3_add_credits(server->CurrentMid, 180 server->conn_id, server->hostname, scredits, add, in_flight); 181 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 182 } 183 184 static void 185 smb2_set_credits(struct TCP_Server_Info *server, const int val) 186 { 187 int scredits, in_flight; 188 189 spin_lock(&server->req_lock); 190 server->credits = val; 191 if (val == 1) { 192 server->reconnect_instance++; 193 /* 194 * ChannelSequence updated for all channels in primary channel so that consistent 195 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 196 */ 197 if (SERVER_IS_CHAN(server)) 198 server->primary_server->channel_sequence_num++; 199 else 200 server->channel_sequence_num++; 201 } 202 scredits = server->credits; 203 in_flight = server->in_flight; 204 spin_unlock(&server->req_lock); 205 206 trace_smb3_set_credits(server->CurrentMid, 207 server->conn_id, server->hostname, scredits, val, in_flight); 208 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 209 210 /* don't log while holding the lock */ 211 if (val == 1) 212 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 213 } 214 215 static int * 216 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 217 { 218 switch (optype) { 219 case CIFS_ECHO_OP: 220 return &server->echo_credits; 221 case CIFS_OBREAK_OP: 222 return &server->oplock_credits; 223 default: 224 return &server->credits; 225 } 226 } 227 228 static unsigned int 229 smb2_get_credits(struct mid_q_entry *mid) 230 { 231 return mid->credits_received; 232 } 233 234 static int 235 smb2_wait_mtu_credits(struct TCP_Server_Info *server, size_t size, 236 size_t *num, struct cifs_credits *credits) 237 { 238 int rc = 0; 239 unsigned int scredits, in_flight; 240 241 spin_lock(&server->req_lock); 242 while (1) { 243 spin_unlock(&server->req_lock); 244 245 spin_lock(&server->srv_lock); 246 if (server->tcpStatus == CifsExiting) { 247 spin_unlock(&server->srv_lock); 248 return -ENOENT; 249 } 250 spin_unlock(&server->srv_lock); 251 252 spin_lock(&server->req_lock); 253 if (server->credits <= 0) { 254 spin_unlock(&server->req_lock); 255 cifs_num_waiters_inc(server); 256 rc = wait_event_killable(server->request_q, 257 has_credits(server, &server->credits, 1)); 258 cifs_num_waiters_dec(server); 259 if (rc) 260 return rc; 261 spin_lock(&server->req_lock); 262 } else { 263 scredits = server->credits; 264 /* can deadlock with reopen */ 265 if (scredits <= 8) { 266 *num = SMB2_MAX_BUFFER_SIZE; 267 credits->value = 0; 268 credits->instance = 0; 269 break; 270 } 271 272 /* leave some credits for reopen and other ops */ 273 scredits -= 8; 274 *num = min_t(unsigned int, size, 275 scredits * SMB2_MAX_BUFFER_SIZE); 276 277 credits->value = 278 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 279 credits->instance = server->reconnect_instance; 280 server->credits -= credits->value; 281 server->in_flight++; 282 if (server->in_flight > server->max_in_flight) 283 server->max_in_flight = server->in_flight; 284 break; 285 } 286 } 287 scredits = server->credits; 288 in_flight = server->in_flight; 289 spin_unlock(&server->req_lock); 290 291 trace_smb3_wait_credits(server->CurrentMid, 292 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 293 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 294 __func__, credits->value, scredits); 295 296 return rc; 297 } 298 299 static int 300 smb2_adjust_credits(struct TCP_Server_Info *server, 301 struct cifs_io_subrequest *subreq, 302 unsigned int /*enum smb3_rw_credits_trace*/ trace) 303 { 304 struct cifs_credits *credits = &subreq->credits; 305 int new_val = DIV_ROUND_UP(subreq->subreq.len - subreq->subreq.transferred, 306 SMB2_MAX_BUFFER_SIZE); 307 int scredits, in_flight; 308 309 if (!credits->value || credits->value == new_val) 310 return 0; 311 312 if (credits->value < new_val) { 313 trace_smb3_rw_credits(subreq->rreq->debug_id, 314 subreq->subreq.debug_index, 315 credits->value, 316 server->credits, server->in_flight, 317 new_val - credits->value, 318 cifs_trace_rw_credits_no_adjust_up); 319 trace_smb3_too_many_credits(server->CurrentMid, 320 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 321 cifs_server_dbg(VFS, "R=%x[%x] request has less credits (%d) than required (%d)", 322 subreq->rreq->debug_id, subreq->subreq.debug_index, 323 credits->value, new_val); 324 325 return -EOPNOTSUPP; 326 } 327 328 spin_lock(&server->req_lock); 329 330 if (server->reconnect_instance != credits->instance) { 331 scredits = server->credits; 332 in_flight = server->in_flight; 333 spin_unlock(&server->req_lock); 334 335 trace_smb3_rw_credits(subreq->rreq->debug_id, 336 subreq->subreq.debug_index, 337 credits->value, 338 server->credits, server->in_flight, 339 new_val - credits->value, 340 cifs_trace_rw_credits_old_session); 341 trace_smb3_reconnect_detected(server->CurrentMid, 342 server->conn_id, server->hostname, scredits, 343 credits->value - new_val, in_flight); 344 cifs_server_dbg(VFS, "R=%x[%x] trying to return %d credits to old session\n", 345 subreq->rreq->debug_id, subreq->subreq.debug_index, 346 credits->value - new_val); 347 return -EAGAIN; 348 } 349 350 trace_smb3_rw_credits(subreq->rreq->debug_id, 351 subreq->subreq.debug_index, 352 credits->value, 353 server->credits, server->in_flight, 354 new_val - credits->value, trace); 355 server->credits += credits->value - new_val; 356 scredits = server->credits; 357 in_flight = server->in_flight; 358 spin_unlock(&server->req_lock); 359 wake_up(&server->request_q); 360 361 trace_smb3_adj_credits(server->CurrentMid, 362 server->conn_id, server->hostname, scredits, 363 credits->value - new_val, in_flight); 364 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 365 __func__, credits->value - new_val, scredits); 366 367 credits->value = new_val; 368 369 return 0; 370 } 371 372 static __u64 373 smb2_get_next_mid(struct TCP_Server_Info *server) 374 { 375 __u64 mid; 376 /* for SMB2 we need the current value */ 377 spin_lock(&server->mid_lock); 378 mid = server->CurrentMid++; 379 spin_unlock(&server->mid_lock); 380 return mid; 381 } 382 383 static void 384 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 385 { 386 spin_lock(&server->mid_lock); 387 if (server->CurrentMid >= val) 388 server->CurrentMid -= val; 389 spin_unlock(&server->mid_lock); 390 } 391 392 static struct mid_q_entry * 393 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 394 { 395 struct mid_q_entry *mid; 396 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 397 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 398 399 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 400 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 401 return NULL; 402 } 403 404 spin_lock(&server->mid_lock); 405 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 406 if ((mid->mid == wire_mid) && 407 (mid->mid_state == MID_REQUEST_SUBMITTED) && 408 (mid->command == shdr->Command)) { 409 kref_get(&mid->refcount); 410 if (dequeue) { 411 list_del_init(&mid->qhead); 412 mid->mid_flags |= MID_DELETED; 413 } 414 spin_unlock(&server->mid_lock); 415 return mid; 416 } 417 } 418 spin_unlock(&server->mid_lock); 419 return NULL; 420 } 421 422 static struct mid_q_entry * 423 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 424 { 425 return __smb2_find_mid(server, buf, false); 426 } 427 428 static struct mid_q_entry * 429 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 430 { 431 return __smb2_find_mid(server, buf, true); 432 } 433 434 static void 435 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 436 { 437 #ifdef CONFIG_CIFS_DEBUG2 438 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 439 440 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 441 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 442 shdr->Id.SyncId.ProcessId); 443 if (!server->ops->check_message(buf, server->total_read, server)) { 444 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 445 server->ops->calc_smb_size(buf)); 446 } 447 #endif 448 } 449 450 static bool 451 smb2_need_neg(struct TCP_Server_Info *server) 452 { 453 return server->max_read == 0; 454 } 455 456 static int 457 smb2_negotiate(const unsigned int xid, 458 struct cifs_ses *ses, 459 struct TCP_Server_Info *server) 460 { 461 int rc; 462 463 spin_lock(&server->mid_lock); 464 server->CurrentMid = 0; 465 spin_unlock(&server->mid_lock); 466 rc = SMB2_negotiate(xid, ses, server); 467 return rc; 468 } 469 470 static inline unsigned int 471 prevent_zero_iosize(unsigned int size, const char *type) 472 { 473 if (size == 0) { 474 cifs_dbg(VFS, "SMB: Zero %ssize calculated, using minimum value %u\n", 475 type, CIFS_MIN_DEFAULT_IOSIZE); 476 return CIFS_MIN_DEFAULT_IOSIZE; 477 } 478 return size; 479 } 480 481 static unsigned int 482 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 483 { 484 struct TCP_Server_Info *server = tcon->ses->server; 485 unsigned int wsize; 486 487 /* start with specified wsize, or default */ 488 wsize = ctx->got_wsize ? ctx->vol_wsize : CIFS_DEFAULT_IOSIZE; 489 wsize = min_t(unsigned int, wsize, server->max_write); 490 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 491 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 492 493 return prevent_zero_iosize(wsize, "w"); 494 } 495 496 static unsigned int 497 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 498 { 499 struct TCP_Server_Info *server = tcon->ses->server; 500 unsigned int wsize; 501 502 /* start with specified wsize, or default */ 503 wsize = ctx->got_wsize ? ctx->vol_wsize : SMB3_DEFAULT_IOSIZE; 504 wsize = min_t(unsigned int, wsize, server->max_write); 505 #ifdef CONFIG_CIFS_SMB_DIRECT 506 if (server->rdma) { 507 if (server->sign) 508 /* 509 * Account for SMB2 data transfer packet header and 510 * possible encryption header 511 */ 512 wsize = min_t(unsigned int, 513 wsize, 514 server->smbd_conn->max_fragmented_send_size - 515 SMB2_READWRITE_PDU_HEADER_SIZE - 516 sizeof(struct smb2_transform_hdr)); 517 else 518 wsize = min_t(unsigned int, 519 wsize, server->smbd_conn->max_readwrite_size); 520 } 521 #endif 522 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 523 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 524 525 return prevent_zero_iosize(wsize, "w"); 526 } 527 528 static unsigned int 529 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 530 { 531 struct TCP_Server_Info *server = tcon->ses->server; 532 unsigned int rsize; 533 534 /* start with specified rsize, or default */ 535 rsize = ctx->got_rsize ? ctx->vol_rsize : CIFS_DEFAULT_IOSIZE; 536 rsize = min_t(unsigned int, rsize, server->max_read); 537 538 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 539 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 540 541 return prevent_zero_iosize(rsize, "r"); 542 } 543 544 static unsigned int 545 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 546 { 547 struct TCP_Server_Info *server = tcon->ses->server; 548 unsigned int rsize; 549 550 /* start with specified rsize, or default */ 551 rsize = ctx->got_rsize ? ctx->vol_rsize : SMB3_DEFAULT_IOSIZE; 552 rsize = min_t(unsigned int, rsize, server->max_read); 553 #ifdef CONFIG_CIFS_SMB_DIRECT 554 if (server->rdma) { 555 if (server->sign) 556 /* 557 * Account for SMB2 data transfer packet header and 558 * possible encryption header 559 */ 560 rsize = min_t(unsigned int, 561 rsize, 562 server->smbd_conn->max_fragmented_recv_size - 563 SMB2_READWRITE_PDU_HEADER_SIZE - 564 sizeof(struct smb2_transform_hdr)); 565 else 566 rsize = min_t(unsigned int, 567 rsize, server->smbd_conn->max_readwrite_size); 568 } 569 #endif 570 571 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 572 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 573 574 return prevent_zero_iosize(rsize, "r"); 575 } 576 577 /* 578 * compare two interfaces a and b 579 * return 0 if everything matches. 580 * return 1 if a is rdma capable, or rss capable, or has higher link speed 581 * return -1 otherwise. 582 */ 583 static int 584 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 585 { 586 int cmp_ret = 0; 587 588 WARN_ON(!a || !b); 589 if (a->rdma_capable == b->rdma_capable) { 590 if (a->rss_capable == b->rss_capable) { 591 if (a->speed == b->speed) { 592 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 593 (struct sockaddr *) &b->sockaddr); 594 if (!cmp_ret) 595 return 0; 596 else if (cmp_ret > 0) 597 return 1; 598 else 599 return -1; 600 } else if (a->speed > b->speed) 601 return 1; 602 else 603 return -1; 604 } else if (a->rss_capable > b->rss_capable) 605 return 1; 606 else 607 return -1; 608 } else if (a->rdma_capable > b->rdma_capable) 609 return 1; 610 else 611 return -1; 612 } 613 614 static int 615 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 616 size_t buf_len, struct cifs_ses *ses, bool in_mount) 617 { 618 struct network_interface_info_ioctl_rsp *p; 619 struct sockaddr_in *addr4; 620 struct sockaddr_in6 *addr6; 621 struct iface_info_ipv4 *p4; 622 struct iface_info_ipv6 *p6; 623 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 624 struct cifs_server_iface tmp_iface; 625 ssize_t bytes_left; 626 size_t next = 0; 627 int nb_iface = 0; 628 int rc = 0, ret = 0; 629 630 bytes_left = buf_len; 631 p = buf; 632 633 spin_lock(&ses->iface_lock); 634 /* do not query too frequently, this time with lock held */ 635 if (ses->iface_last_update && 636 time_before(jiffies, ses->iface_last_update + 637 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 638 spin_unlock(&ses->iface_lock); 639 return 0; 640 } 641 642 /* 643 * Go through iface_list and mark them as inactive 644 */ 645 list_for_each_entry_safe(iface, niface, &ses->iface_list, 646 iface_head) 647 iface->is_active = 0; 648 649 spin_unlock(&ses->iface_lock); 650 651 /* 652 * Samba server e.g. can return an empty interface list in some cases, 653 * which would only be a problem if we were requesting multichannel 654 */ 655 if (bytes_left == 0) { 656 /* avoid spamming logs every 10 minutes, so log only in mount */ 657 if ((ses->chan_max > 1) && in_mount) 658 cifs_dbg(VFS, 659 "multichannel not available\n" 660 "Empty network interface list returned by server %s\n", 661 ses->server->hostname); 662 rc = -EOPNOTSUPP; 663 ses->iface_last_update = jiffies; 664 goto out; 665 } 666 667 while (bytes_left >= (ssize_t)sizeof(*p)) { 668 memset(&tmp_iface, 0, sizeof(tmp_iface)); 669 /* default to 1Gbps when link speed is unset */ 670 tmp_iface.speed = le64_to_cpu(p->LinkSpeed) ?: 1000000000; 671 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 672 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 673 674 switch (p->Family) { 675 /* 676 * The kernel and wire socket structures have the same 677 * layout and use network byte order but make the 678 * conversion explicit in case either one changes. 679 */ 680 case INTERNETWORK: 681 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 682 p4 = (struct iface_info_ipv4 *)p->Buffer; 683 addr4->sin_family = AF_INET; 684 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 685 686 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 687 addr4->sin_port = cpu_to_be16(CIFS_PORT); 688 689 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 690 &addr4->sin_addr); 691 break; 692 case INTERNETWORKV6: 693 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 694 p6 = (struct iface_info_ipv6 *)p->Buffer; 695 addr6->sin6_family = AF_INET6; 696 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 697 698 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 699 addr6->sin6_flowinfo = 0; 700 addr6->sin6_scope_id = 0; 701 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 702 703 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 704 &addr6->sin6_addr); 705 break; 706 default: 707 cifs_dbg(VFS, 708 "%s: skipping unsupported socket family\n", 709 __func__); 710 goto next_iface; 711 } 712 713 /* 714 * The iface_list is assumed to be sorted by speed. 715 * Check if the new interface exists in that list. 716 * NEVER change iface. it could be in use. 717 * Add a new one instead 718 */ 719 spin_lock(&ses->iface_lock); 720 list_for_each_entry_safe(iface, niface, &ses->iface_list, 721 iface_head) { 722 ret = iface_cmp(iface, &tmp_iface); 723 if (!ret) { 724 iface->is_active = 1; 725 spin_unlock(&ses->iface_lock); 726 goto next_iface; 727 } else if (ret < 0) { 728 /* all remaining ifaces are slower */ 729 kref_get(&iface->refcount); 730 break; 731 } 732 } 733 spin_unlock(&ses->iface_lock); 734 735 /* no match. insert the entry in the list */ 736 info = kmalloc(sizeof(struct cifs_server_iface), 737 GFP_KERNEL); 738 if (!info) { 739 rc = -ENOMEM; 740 goto out; 741 } 742 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 743 744 /* add this new entry to the list */ 745 kref_init(&info->refcount); 746 info->is_active = 1; 747 748 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 749 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 750 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 751 le32_to_cpu(p->Capability)); 752 753 spin_lock(&ses->iface_lock); 754 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 755 list_add_tail(&info->iface_head, &iface->iface_head); 756 kref_put(&iface->refcount, release_iface); 757 } else 758 list_add_tail(&info->iface_head, &ses->iface_list); 759 760 ses->iface_count++; 761 spin_unlock(&ses->iface_lock); 762 next_iface: 763 nb_iface++; 764 next = le32_to_cpu(p->Next); 765 if (!next) { 766 bytes_left -= sizeof(*p); 767 break; 768 } 769 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 770 bytes_left -= next; 771 } 772 773 if (!nb_iface) { 774 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 775 rc = -EINVAL; 776 goto out; 777 } 778 779 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 780 if ((bytes_left > 8) || p->Next) 781 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 782 783 ses->iface_last_update = jiffies; 784 785 out: 786 /* 787 * Go through the list again and put the inactive entries 788 */ 789 spin_lock(&ses->iface_lock); 790 list_for_each_entry_safe(iface, niface, &ses->iface_list, 791 iface_head) { 792 if (!iface->is_active) { 793 list_del(&iface->iface_head); 794 kref_put(&iface->refcount, release_iface); 795 ses->iface_count--; 796 } 797 } 798 spin_unlock(&ses->iface_lock); 799 800 return rc; 801 } 802 803 int 804 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 805 { 806 int rc; 807 unsigned int ret_data_len = 0; 808 struct network_interface_info_ioctl_rsp *out_buf = NULL; 809 struct cifs_ses *ses = tcon->ses; 810 struct TCP_Server_Info *pserver; 811 812 /* do not query too frequently */ 813 if (ses->iface_last_update && 814 time_before(jiffies, ses->iface_last_update + 815 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 816 return 0; 817 818 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 819 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 820 NULL /* no data input */, 0 /* no data input */, 821 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 822 if (rc == -EOPNOTSUPP) { 823 cifs_dbg(FYI, 824 "server does not support query network interfaces\n"); 825 ret_data_len = 0; 826 } else if (rc != 0) { 827 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 828 goto out; 829 } 830 831 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 832 if (rc) 833 goto out; 834 835 /* check if iface is still active */ 836 spin_lock(&ses->chan_lock); 837 pserver = ses->chans[0].server; 838 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 839 spin_unlock(&ses->chan_lock); 840 cifs_chan_update_iface(ses, pserver); 841 spin_lock(&ses->chan_lock); 842 } 843 spin_unlock(&ses->chan_lock); 844 845 out: 846 kfree(out_buf); 847 return rc; 848 } 849 850 static void 851 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 852 struct cifs_sb_info *cifs_sb) 853 { 854 int rc; 855 __le16 srch_path = 0; /* Null - open root of share */ 856 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 857 struct cifs_open_parms oparms; 858 struct cifs_fid fid; 859 struct cached_fid *cfid = NULL; 860 861 oparms = (struct cifs_open_parms) { 862 .tcon = tcon, 863 .path = "", 864 .desired_access = FILE_READ_ATTRIBUTES, 865 .disposition = FILE_OPEN, 866 .create_options = cifs_create_options(cifs_sb, 0), 867 .fid = &fid, 868 }; 869 870 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 871 if (rc == 0) 872 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 873 else 874 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 875 NULL, NULL); 876 if (rc) 877 return; 878 879 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 880 881 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 882 FS_ATTRIBUTE_INFORMATION); 883 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 884 FS_DEVICE_INFORMATION); 885 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 886 FS_VOLUME_INFORMATION); 887 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 888 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 889 if (cfid == NULL) 890 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 891 else 892 close_cached_dir(cfid); 893 } 894 895 static void 896 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 897 struct cifs_sb_info *cifs_sb) 898 { 899 int rc; 900 __le16 srch_path = 0; /* Null - open root of share */ 901 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 902 struct cifs_open_parms oparms; 903 struct cifs_fid fid; 904 905 oparms = (struct cifs_open_parms) { 906 .tcon = tcon, 907 .path = "", 908 .desired_access = FILE_READ_ATTRIBUTES, 909 .disposition = FILE_OPEN, 910 .create_options = cifs_create_options(cifs_sb, 0), 911 .fid = &fid, 912 }; 913 914 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 915 NULL, NULL); 916 if (rc) 917 return; 918 919 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 920 FS_ATTRIBUTE_INFORMATION); 921 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 922 FS_DEVICE_INFORMATION); 923 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 924 } 925 926 static int 927 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 928 struct cifs_sb_info *cifs_sb, const char *full_path) 929 { 930 __le16 *utf16_path; 931 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 932 int err_buftype = CIFS_NO_BUFFER; 933 struct cifs_open_parms oparms; 934 struct kvec err_iov = {}; 935 struct cifs_fid fid; 936 struct cached_fid *cfid; 937 bool islink; 938 int rc, rc2; 939 940 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 941 if (!rc) { 942 if (cfid->has_lease) { 943 close_cached_dir(cfid); 944 return 0; 945 } 946 close_cached_dir(cfid); 947 } 948 949 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 950 if (!utf16_path) 951 return -ENOMEM; 952 953 oparms = (struct cifs_open_parms) { 954 .tcon = tcon, 955 .path = full_path, 956 .desired_access = FILE_READ_ATTRIBUTES, 957 .disposition = FILE_OPEN, 958 .create_options = cifs_create_options(cifs_sb, 0), 959 .fid = &fid, 960 }; 961 962 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 963 &err_iov, &err_buftype); 964 if (rc) { 965 struct smb2_hdr *hdr = err_iov.iov_base; 966 967 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 968 goto out; 969 970 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 971 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 972 full_path, &islink); 973 if (rc2) { 974 rc = rc2; 975 goto out; 976 } 977 if (islink) 978 rc = -EREMOTE; 979 } 980 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && 981 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 982 rc = -EOPNOTSUPP; 983 goto out; 984 } 985 986 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 987 988 out: 989 free_rsp_buf(err_buftype, err_iov.iov_base); 990 kfree(utf16_path); 991 return rc; 992 } 993 994 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 995 struct cifs_sb_info *cifs_sb, const char *full_path, 996 u64 *uniqueid, struct cifs_open_info_data *data) 997 { 998 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 999 return 0; 1000 } 1001 1002 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 1003 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 1004 { 1005 struct cifs_fid *fid = &cfile->fid; 1006 1007 if (cfile->symlink_target) { 1008 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 1009 if (!data->symlink_target) 1010 return -ENOMEM; 1011 } 1012 data->contains_posix_file_info = false; 1013 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 1014 } 1015 1016 #ifdef CONFIG_CIFS_XATTR 1017 static ssize_t 1018 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 1019 struct smb2_file_full_ea_info *src, size_t src_size, 1020 const unsigned char *ea_name) 1021 { 1022 int rc = 0; 1023 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 1024 char *name, *value; 1025 size_t buf_size = dst_size; 1026 size_t name_len, value_len, user_name_len; 1027 1028 while (src_size > 0) { 1029 name_len = (size_t)src->ea_name_length; 1030 value_len = (size_t)le16_to_cpu(src->ea_value_length); 1031 1032 if (name_len == 0) 1033 break; 1034 1035 if (src_size < 8 + name_len + 1 + value_len) { 1036 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 1037 rc = -EIO; 1038 goto out; 1039 } 1040 1041 name = &src->ea_data[0]; 1042 value = &src->ea_data[src->ea_name_length + 1]; 1043 1044 if (ea_name) { 1045 if (ea_name_len == name_len && 1046 memcmp(ea_name, name, name_len) == 0) { 1047 rc = value_len; 1048 if (dst_size == 0) 1049 goto out; 1050 if (dst_size < value_len) { 1051 rc = -ERANGE; 1052 goto out; 1053 } 1054 memcpy(dst, value, value_len); 1055 goto out; 1056 } 1057 } else { 1058 /* 'user.' plus a terminating null */ 1059 user_name_len = 5 + 1 + name_len; 1060 1061 if (buf_size == 0) { 1062 /* skip copy - calc size only */ 1063 rc += user_name_len; 1064 } else if (dst_size >= user_name_len) { 1065 dst_size -= user_name_len; 1066 memcpy(dst, "user.", 5); 1067 dst += 5; 1068 memcpy(dst, src->ea_data, name_len); 1069 dst += name_len; 1070 *dst = 0; 1071 ++dst; 1072 rc += user_name_len; 1073 } else { 1074 /* stop before overrun buffer */ 1075 rc = -ERANGE; 1076 break; 1077 } 1078 } 1079 1080 if (!src->next_entry_offset) 1081 break; 1082 1083 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1084 /* stop before overrun buffer */ 1085 rc = -ERANGE; 1086 break; 1087 } 1088 src_size -= le32_to_cpu(src->next_entry_offset); 1089 src = (void *)((char *)src + 1090 le32_to_cpu(src->next_entry_offset)); 1091 } 1092 1093 /* didn't find the named attribute */ 1094 if (ea_name) 1095 rc = -ENODATA; 1096 1097 out: 1098 return (ssize_t)rc; 1099 } 1100 1101 static ssize_t 1102 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1103 const unsigned char *path, const unsigned char *ea_name, 1104 char *ea_data, size_t buf_size, 1105 struct cifs_sb_info *cifs_sb) 1106 { 1107 int rc; 1108 struct kvec rsp_iov = {NULL, 0}; 1109 int buftype = CIFS_NO_BUFFER; 1110 struct smb2_query_info_rsp *rsp; 1111 struct smb2_file_full_ea_info *info = NULL; 1112 1113 rc = smb2_query_info_compound(xid, tcon, path, 1114 FILE_READ_EA, 1115 FILE_FULL_EA_INFORMATION, 1116 SMB2_O_INFO_FILE, 1117 CIFSMaxBufSize - 1118 MAX_SMB2_CREATE_RESPONSE_SIZE - 1119 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1120 &rsp_iov, &buftype, cifs_sb); 1121 if (rc) { 1122 /* 1123 * If ea_name is NULL (listxattr) and there are no EAs, 1124 * return 0 as it's not an error. Otherwise, the specified 1125 * ea_name was not found. 1126 */ 1127 if (!ea_name && rc == -ENODATA) 1128 rc = 0; 1129 goto qeas_exit; 1130 } 1131 1132 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1133 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1134 le32_to_cpu(rsp->OutputBufferLength), 1135 &rsp_iov, 1136 sizeof(struct smb2_file_full_ea_info)); 1137 if (rc) 1138 goto qeas_exit; 1139 1140 info = (struct smb2_file_full_ea_info *)( 1141 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1142 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1143 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1144 1145 qeas_exit: 1146 free_rsp_buf(buftype, rsp_iov.iov_base); 1147 return rc; 1148 } 1149 1150 static int 1151 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1152 const char *path, const char *ea_name, const void *ea_value, 1153 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1154 struct cifs_sb_info *cifs_sb) 1155 { 1156 struct smb2_compound_vars *vars; 1157 struct cifs_ses *ses = tcon->ses; 1158 struct TCP_Server_Info *server; 1159 struct smb_rqst *rqst; 1160 struct kvec *rsp_iov; 1161 __le16 *utf16_path = NULL; 1162 int ea_name_len = strlen(ea_name); 1163 int flags = CIFS_CP_CREATE_CLOSE_OP; 1164 int len; 1165 int resp_buftype[3]; 1166 struct cifs_open_parms oparms; 1167 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1168 struct cifs_fid fid; 1169 unsigned int size[1]; 1170 void *data[1]; 1171 struct smb2_file_full_ea_info *ea; 1172 struct smb2_query_info_rsp *rsp; 1173 int rc, used_len = 0; 1174 int retries = 0, cur_sleep = 1; 1175 1176 replay_again: 1177 /* reinitialize for possible replay */ 1178 flags = CIFS_CP_CREATE_CLOSE_OP; 1179 oplock = SMB2_OPLOCK_LEVEL_NONE; 1180 server = cifs_pick_channel(ses); 1181 1182 if (smb3_encryption_required(tcon)) 1183 flags |= CIFS_TRANSFORM_REQ; 1184 1185 if (ea_name_len > 255) 1186 return -EINVAL; 1187 1188 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1189 if (!utf16_path) 1190 return -ENOMEM; 1191 1192 ea = NULL; 1193 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1194 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1195 if (!vars) { 1196 rc = -ENOMEM; 1197 goto out_free_path; 1198 } 1199 rqst = vars->rqst; 1200 rsp_iov = vars->rsp_iov; 1201 1202 if (ses->server->ops->query_all_EAs) { 1203 if (!ea_value) { 1204 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1205 ea_name, NULL, 0, 1206 cifs_sb); 1207 if (rc == -ENODATA) 1208 goto sea_exit; 1209 } else { 1210 /* If we are adding a attribute we should first check 1211 * if there will be enough space available to store 1212 * the new EA. If not we should not add it since we 1213 * would not be able to even read the EAs back. 1214 */ 1215 rc = smb2_query_info_compound(xid, tcon, path, 1216 FILE_READ_EA, 1217 FILE_FULL_EA_INFORMATION, 1218 SMB2_O_INFO_FILE, 1219 CIFSMaxBufSize - 1220 MAX_SMB2_CREATE_RESPONSE_SIZE - 1221 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1222 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1223 if (rc == 0) { 1224 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1225 used_len = le32_to_cpu(rsp->OutputBufferLength); 1226 } 1227 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1228 resp_buftype[1] = CIFS_NO_BUFFER; 1229 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1230 rc = 0; 1231 1232 /* Use a fudge factor of 256 bytes in case we collide 1233 * with a different set_EAs command. 1234 */ 1235 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1236 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1237 used_len + ea_name_len + ea_value_len + 1) { 1238 rc = -ENOSPC; 1239 goto sea_exit; 1240 } 1241 } 1242 } 1243 1244 /* Open */ 1245 rqst[0].rq_iov = vars->open_iov; 1246 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1247 1248 oparms = (struct cifs_open_parms) { 1249 .tcon = tcon, 1250 .path = path, 1251 .desired_access = FILE_WRITE_EA, 1252 .disposition = FILE_OPEN, 1253 .create_options = cifs_create_options(cifs_sb, 0), 1254 .fid = &fid, 1255 .replay = !!(retries), 1256 }; 1257 1258 rc = SMB2_open_init(tcon, server, 1259 &rqst[0], &oplock, &oparms, utf16_path); 1260 if (rc) 1261 goto sea_exit; 1262 smb2_set_next_command(tcon, &rqst[0]); 1263 1264 1265 /* Set Info */ 1266 rqst[1].rq_iov = vars->si_iov; 1267 rqst[1].rq_nvec = 1; 1268 1269 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1270 ea = kzalloc(len, GFP_KERNEL); 1271 if (ea == NULL) { 1272 rc = -ENOMEM; 1273 goto sea_exit; 1274 } 1275 1276 ea->ea_name_length = ea_name_len; 1277 ea->ea_value_length = cpu_to_le16(ea_value_len); 1278 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1279 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1280 1281 size[0] = len; 1282 data[0] = ea; 1283 1284 rc = SMB2_set_info_init(tcon, server, 1285 &rqst[1], COMPOUND_FID, 1286 COMPOUND_FID, current->tgid, 1287 FILE_FULL_EA_INFORMATION, 1288 SMB2_O_INFO_FILE, 0, data, size); 1289 if (rc) 1290 goto sea_exit; 1291 smb2_set_next_command(tcon, &rqst[1]); 1292 smb2_set_related(&rqst[1]); 1293 1294 /* Close */ 1295 rqst[2].rq_iov = &vars->close_iov; 1296 rqst[2].rq_nvec = 1; 1297 rc = SMB2_close_init(tcon, server, 1298 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1299 if (rc) 1300 goto sea_exit; 1301 smb2_set_related(&rqst[2]); 1302 1303 if (retries) { 1304 smb2_set_replay(server, &rqst[0]); 1305 smb2_set_replay(server, &rqst[1]); 1306 smb2_set_replay(server, &rqst[2]); 1307 } 1308 1309 rc = compound_send_recv(xid, ses, server, 1310 flags, 3, rqst, 1311 resp_buftype, rsp_iov); 1312 /* no need to bump num_remote_opens because handle immediately closed */ 1313 1314 sea_exit: 1315 kfree(ea); 1316 SMB2_open_free(&rqst[0]); 1317 SMB2_set_info_free(&rqst[1]); 1318 SMB2_close_free(&rqst[2]); 1319 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1320 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1321 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1322 kfree(vars); 1323 out_free_path: 1324 kfree(utf16_path); 1325 1326 if (is_replayable_error(rc) && 1327 smb2_should_replay(tcon, &retries, &cur_sleep)) 1328 goto replay_again; 1329 1330 return rc; 1331 } 1332 #endif 1333 1334 static bool 1335 smb2_can_echo(struct TCP_Server_Info *server) 1336 { 1337 return server->echoes; 1338 } 1339 1340 static void 1341 smb2_clear_stats(struct cifs_tcon *tcon) 1342 { 1343 int i; 1344 1345 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1346 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1347 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1348 } 1349 } 1350 1351 static void 1352 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1353 { 1354 seq_puts(m, "\n\tShare Capabilities:"); 1355 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1356 seq_puts(m, " DFS,"); 1357 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1358 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1359 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1360 seq_puts(m, " SCALEOUT,"); 1361 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1362 seq_puts(m, " CLUSTER,"); 1363 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1364 seq_puts(m, " ASYMMETRIC,"); 1365 if (tcon->capabilities == 0) 1366 seq_puts(m, " None"); 1367 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1368 seq_puts(m, " Aligned,"); 1369 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1370 seq_puts(m, " Partition Aligned,"); 1371 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1372 seq_puts(m, " SSD,"); 1373 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1374 seq_puts(m, " TRIM-support,"); 1375 1376 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1377 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1378 if (tcon->perf_sector_size) 1379 seq_printf(m, "\tOptimal sector size: 0x%x", 1380 tcon->perf_sector_size); 1381 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1382 } 1383 1384 static void 1385 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1386 { 1387 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1388 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1389 1390 /* 1391 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1392 * totals (requests sent) since those SMBs are per-session not per tcon 1393 */ 1394 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1395 (long long)(tcon->bytes_read), 1396 (long long)(tcon->bytes_written)); 1397 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1398 atomic_read(&tcon->num_local_opens), 1399 atomic_read(&tcon->num_remote_opens)); 1400 seq_printf(m, "\nTreeConnects: %d total %d failed", 1401 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1402 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1403 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1404 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1405 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1406 seq_printf(m, "\nCreates: %d total %d failed", 1407 atomic_read(&sent[SMB2_CREATE_HE]), 1408 atomic_read(&failed[SMB2_CREATE_HE])); 1409 seq_printf(m, "\nCloses: %d total %d failed", 1410 atomic_read(&sent[SMB2_CLOSE_HE]), 1411 atomic_read(&failed[SMB2_CLOSE_HE])); 1412 seq_printf(m, "\nFlushes: %d total %d failed", 1413 atomic_read(&sent[SMB2_FLUSH_HE]), 1414 atomic_read(&failed[SMB2_FLUSH_HE])); 1415 seq_printf(m, "\nReads: %d total %d failed", 1416 atomic_read(&sent[SMB2_READ_HE]), 1417 atomic_read(&failed[SMB2_READ_HE])); 1418 seq_printf(m, "\nWrites: %d total %d failed", 1419 atomic_read(&sent[SMB2_WRITE_HE]), 1420 atomic_read(&failed[SMB2_WRITE_HE])); 1421 seq_printf(m, "\nLocks: %d total %d failed", 1422 atomic_read(&sent[SMB2_LOCK_HE]), 1423 atomic_read(&failed[SMB2_LOCK_HE])); 1424 seq_printf(m, "\nIOCTLs: %d total %d failed", 1425 atomic_read(&sent[SMB2_IOCTL_HE]), 1426 atomic_read(&failed[SMB2_IOCTL_HE])); 1427 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1428 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1429 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1430 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1431 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1432 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1433 seq_printf(m, "\nQueryInfos: %d total %d failed", 1434 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1435 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1436 seq_printf(m, "\nSetInfos: %d total %d failed", 1437 atomic_read(&sent[SMB2_SET_INFO_HE]), 1438 atomic_read(&failed[SMB2_SET_INFO_HE])); 1439 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1440 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1441 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1442 } 1443 1444 static void 1445 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1446 { 1447 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1448 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1449 1450 cfile->fid.persistent_fid = fid->persistent_fid; 1451 cfile->fid.volatile_fid = fid->volatile_fid; 1452 cfile->fid.access = fid->access; 1453 #ifdef CONFIG_CIFS_DEBUG2 1454 cfile->fid.mid = fid->mid; 1455 #endif /* CIFS_DEBUG2 */ 1456 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1457 &fid->purge_cache); 1458 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1459 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1460 } 1461 1462 static int 1463 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1464 struct cifs_fid *fid) 1465 { 1466 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1467 } 1468 1469 static int 1470 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1471 struct cifsFileInfo *cfile) 1472 { 1473 struct smb2_file_network_open_info file_inf; 1474 struct inode *inode; 1475 int rc; 1476 1477 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1478 cfile->fid.volatile_fid, &file_inf); 1479 if (rc) 1480 return rc; 1481 1482 inode = d_inode(cfile->dentry); 1483 1484 spin_lock(&inode->i_lock); 1485 CIFS_I(inode)->time = jiffies; 1486 1487 /* Creation time should not need to be updated on close */ 1488 if (file_inf.LastWriteTime) 1489 inode_set_mtime_to_ts(inode, 1490 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1491 if (file_inf.ChangeTime) 1492 inode_set_ctime_to_ts(inode, 1493 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1494 if (file_inf.LastAccessTime) 1495 inode_set_atime_to_ts(inode, 1496 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1497 1498 /* 1499 * i_blocks is not related to (i_size / i_blksize), 1500 * but instead 512 byte (2**9) size is required for 1501 * calculating num blocks. 1502 */ 1503 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1504 inode->i_blocks = 1505 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1506 1507 /* End of file and Attributes should not have to be updated on close */ 1508 spin_unlock(&inode->i_lock); 1509 return rc; 1510 } 1511 1512 static int 1513 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1514 u64 persistent_fid, u64 volatile_fid, 1515 struct copychunk_ioctl *pcchunk) 1516 { 1517 int rc; 1518 unsigned int ret_data_len; 1519 struct resume_key_req *res_key; 1520 1521 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1522 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1523 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1524 1525 if (rc == -EOPNOTSUPP) { 1526 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1527 goto req_res_key_exit; 1528 } else if (rc) { 1529 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1530 goto req_res_key_exit; 1531 } 1532 if (ret_data_len < sizeof(struct resume_key_req)) { 1533 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1534 rc = -EINVAL; 1535 goto req_res_key_exit; 1536 } 1537 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1538 1539 req_res_key_exit: 1540 kfree(res_key); 1541 return rc; 1542 } 1543 1544 static int 1545 smb2_ioctl_query_info(const unsigned int xid, 1546 struct cifs_tcon *tcon, 1547 struct cifs_sb_info *cifs_sb, 1548 __le16 *path, int is_dir, 1549 unsigned long p) 1550 { 1551 struct smb2_compound_vars *vars; 1552 struct smb_rqst *rqst; 1553 struct kvec *rsp_iov; 1554 struct cifs_ses *ses = tcon->ses; 1555 struct TCP_Server_Info *server; 1556 char __user *arg = (char __user *)p; 1557 struct smb_query_info qi; 1558 struct smb_query_info __user *pqi; 1559 int rc = 0; 1560 int flags = CIFS_CP_CREATE_CLOSE_OP; 1561 struct smb2_query_info_rsp *qi_rsp = NULL; 1562 struct smb2_ioctl_rsp *io_rsp = NULL; 1563 void *buffer = NULL; 1564 int resp_buftype[3]; 1565 struct cifs_open_parms oparms; 1566 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1567 struct cifs_fid fid; 1568 unsigned int size[2]; 1569 void *data[2]; 1570 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1571 void (*free_req1_func)(struct smb_rqst *r); 1572 int retries = 0, cur_sleep = 1; 1573 1574 replay_again: 1575 /* reinitialize for possible replay */ 1576 flags = CIFS_CP_CREATE_CLOSE_OP; 1577 oplock = SMB2_OPLOCK_LEVEL_NONE; 1578 server = cifs_pick_channel(ses); 1579 1580 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1581 if (vars == NULL) 1582 return -ENOMEM; 1583 rqst = &vars->rqst[0]; 1584 rsp_iov = &vars->rsp_iov[0]; 1585 1586 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1587 1588 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1589 rc = -EFAULT; 1590 goto free_vars; 1591 } 1592 if (qi.output_buffer_length > 1024) { 1593 rc = -EINVAL; 1594 goto free_vars; 1595 } 1596 1597 if (!ses || !server) { 1598 rc = -EIO; 1599 goto free_vars; 1600 } 1601 1602 if (smb3_encryption_required(tcon)) 1603 flags |= CIFS_TRANSFORM_REQ; 1604 1605 if (qi.output_buffer_length) { 1606 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1607 if (IS_ERR(buffer)) { 1608 rc = PTR_ERR(buffer); 1609 goto free_vars; 1610 } 1611 } 1612 1613 /* Open */ 1614 rqst[0].rq_iov = &vars->open_iov[0]; 1615 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1616 1617 oparms = (struct cifs_open_parms) { 1618 .tcon = tcon, 1619 .disposition = FILE_OPEN, 1620 .create_options = cifs_create_options(cifs_sb, create_options), 1621 .fid = &fid, 1622 .replay = !!(retries), 1623 }; 1624 1625 if (qi.flags & PASSTHRU_FSCTL) { 1626 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1627 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1628 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1629 break; 1630 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1631 oparms.desired_access = GENERIC_ALL; 1632 break; 1633 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1634 oparms.desired_access = GENERIC_READ; 1635 break; 1636 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1637 oparms.desired_access = GENERIC_WRITE; 1638 break; 1639 } 1640 } else if (qi.flags & PASSTHRU_SET_INFO) { 1641 oparms.desired_access = GENERIC_WRITE; 1642 } else { 1643 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1644 } 1645 1646 rc = SMB2_open_init(tcon, server, 1647 &rqst[0], &oplock, &oparms, path); 1648 if (rc) 1649 goto free_output_buffer; 1650 smb2_set_next_command(tcon, &rqst[0]); 1651 1652 /* Query */ 1653 if (qi.flags & PASSTHRU_FSCTL) { 1654 /* Can eventually relax perm check since server enforces too */ 1655 if (!capable(CAP_SYS_ADMIN)) { 1656 rc = -EPERM; 1657 goto free_open_req; 1658 } 1659 rqst[1].rq_iov = &vars->io_iov[0]; 1660 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1661 1662 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1663 qi.info_type, buffer, qi.output_buffer_length, 1664 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1665 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1666 free_req1_func = SMB2_ioctl_free; 1667 } else if (qi.flags == PASSTHRU_SET_INFO) { 1668 /* Can eventually relax perm check since server enforces too */ 1669 if (!capable(CAP_SYS_ADMIN)) { 1670 rc = -EPERM; 1671 goto free_open_req; 1672 } 1673 if (qi.output_buffer_length < 8) { 1674 rc = -EINVAL; 1675 goto free_open_req; 1676 } 1677 rqst[1].rq_iov = vars->si_iov; 1678 rqst[1].rq_nvec = 1; 1679 1680 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1681 size[0] = 8; 1682 data[0] = buffer; 1683 1684 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1685 current->tgid, FILE_END_OF_FILE_INFORMATION, 1686 SMB2_O_INFO_FILE, 0, data, size); 1687 free_req1_func = SMB2_set_info_free; 1688 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1689 rqst[1].rq_iov = &vars->qi_iov; 1690 rqst[1].rq_nvec = 1; 1691 1692 rc = SMB2_query_info_init(tcon, server, 1693 &rqst[1], COMPOUND_FID, 1694 COMPOUND_FID, qi.file_info_class, 1695 qi.info_type, qi.additional_information, 1696 qi.input_buffer_length, 1697 qi.output_buffer_length, buffer); 1698 free_req1_func = SMB2_query_info_free; 1699 } else { /* unknown flags */ 1700 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1701 qi.flags); 1702 rc = -EINVAL; 1703 } 1704 1705 if (rc) 1706 goto free_open_req; 1707 smb2_set_next_command(tcon, &rqst[1]); 1708 smb2_set_related(&rqst[1]); 1709 1710 /* Close */ 1711 rqst[2].rq_iov = &vars->close_iov; 1712 rqst[2].rq_nvec = 1; 1713 1714 rc = SMB2_close_init(tcon, server, 1715 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1716 if (rc) 1717 goto free_req_1; 1718 smb2_set_related(&rqst[2]); 1719 1720 if (retries) { 1721 smb2_set_replay(server, &rqst[0]); 1722 smb2_set_replay(server, &rqst[1]); 1723 smb2_set_replay(server, &rqst[2]); 1724 } 1725 1726 rc = compound_send_recv(xid, ses, server, 1727 flags, 3, rqst, 1728 resp_buftype, rsp_iov); 1729 if (rc) 1730 goto out; 1731 1732 /* No need to bump num_remote_opens since handle immediately closed */ 1733 if (qi.flags & PASSTHRU_FSCTL) { 1734 pqi = (struct smb_query_info __user *)arg; 1735 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1736 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1737 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1738 if (qi.input_buffer_length > 0 && 1739 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1740 > rsp_iov[1].iov_len) { 1741 rc = -EFAULT; 1742 goto out; 1743 } 1744 1745 if (copy_to_user(&pqi->input_buffer_length, 1746 &qi.input_buffer_length, 1747 sizeof(qi.input_buffer_length))) { 1748 rc = -EFAULT; 1749 goto out; 1750 } 1751 1752 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1753 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1754 qi.input_buffer_length)) 1755 rc = -EFAULT; 1756 } else { 1757 pqi = (struct smb_query_info __user *)arg; 1758 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1759 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1760 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1761 if (copy_to_user(&pqi->input_buffer_length, 1762 &qi.input_buffer_length, 1763 sizeof(qi.input_buffer_length))) { 1764 rc = -EFAULT; 1765 goto out; 1766 } 1767 1768 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1769 qi.input_buffer_length)) 1770 rc = -EFAULT; 1771 } 1772 1773 out: 1774 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1775 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1776 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1777 SMB2_close_free(&rqst[2]); 1778 free_req_1: 1779 free_req1_func(&rqst[1]); 1780 free_open_req: 1781 SMB2_open_free(&rqst[0]); 1782 free_output_buffer: 1783 kfree(buffer); 1784 free_vars: 1785 kfree(vars); 1786 1787 if (is_replayable_error(rc) && 1788 smb2_should_replay(tcon, &retries, &cur_sleep)) 1789 goto replay_again; 1790 1791 return rc; 1792 } 1793 1794 static ssize_t 1795 smb2_copychunk_range(const unsigned int xid, 1796 struct cifsFileInfo *srcfile, 1797 struct cifsFileInfo *trgtfile, u64 src_off, 1798 u64 len, u64 dest_off) 1799 { 1800 int rc; 1801 unsigned int ret_data_len; 1802 struct copychunk_ioctl *pcchunk; 1803 struct copychunk_ioctl_rsp *retbuf = NULL; 1804 struct cifs_tcon *tcon; 1805 int chunks_copied = 0; 1806 bool chunk_sizes_updated = false; 1807 ssize_t bytes_written, total_bytes_written = 0; 1808 1809 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1810 if (pcchunk == NULL) 1811 return -ENOMEM; 1812 1813 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1814 /* Request a key from the server to identify the source of the copy */ 1815 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1816 srcfile->fid.persistent_fid, 1817 srcfile->fid.volatile_fid, pcchunk); 1818 1819 /* Note: request_res_key sets res_key null only if rc !=0 */ 1820 if (rc) 1821 goto cchunk_out; 1822 1823 /* For now array only one chunk long, will make more flexible later */ 1824 pcchunk->ChunkCount = cpu_to_le32(1); 1825 pcchunk->Reserved = 0; 1826 pcchunk->Reserved2 = 0; 1827 1828 tcon = tlink_tcon(trgtfile->tlink); 1829 1830 trace_smb3_copychunk_enter(xid, srcfile->fid.volatile_fid, 1831 trgtfile->fid.volatile_fid, tcon->tid, 1832 tcon->ses->Suid, src_off, dest_off, len); 1833 1834 while (len > 0) { 1835 pcchunk->SourceOffset = cpu_to_le64(src_off); 1836 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1837 pcchunk->Length = 1838 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1839 1840 /* Request server copy to target from src identified by key */ 1841 kfree(retbuf); 1842 retbuf = NULL; 1843 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1844 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1845 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1846 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1847 if (rc == 0) { 1848 if (ret_data_len != 1849 sizeof(struct copychunk_ioctl_rsp)) { 1850 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1851 rc = -EIO; 1852 goto cchunk_out; 1853 } 1854 if (retbuf->TotalBytesWritten == 0) { 1855 cifs_dbg(FYI, "no bytes copied\n"); 1856 rc = -EIO; 1857 goto cchunk_out; 1858 } 1859 /* 1860 * Check if server claimed to write more than we asked 1861 */ 1862 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1863 le32_to_cpu(pcchunk->Length)) { 1864 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1865 rc = -EIO; 1866 goto cchunk_out; 1867 } 1868 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1869 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1870 rc = -EIO; 1871 goto cchunk_out; 1872 } 1873 chunks_copied++; 1874 1875 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1876 src_off += bytes_written; 1877 dest_off += bytes_written; 1878 len -= bytes_written; 1879 total_bytes_written += bytes_written; 1880 1881 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1882 le32_to_cpu(retbuf->ChunksWritten), 1883 le32_to_cpu(retbuf->ChunkBytesWritten), 1884 bytes_written); 1885 trace_smb3_copychunk_done(xid, srcfile->fid.volatile_fid, 1886 trgtfile->fid.volatile_fid, tcon->tid, 1887 tcon->ses->Suid, src_off, dest_off, len); 1888 } else if (rc == -EINVAL) { 1889 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1890 goto cchunk_out; 1891 1892 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1893 le32_to_cpu(retbuf->ChunksWritten), 1894 le32_to_cpu(retbuf->ChunkBytesWritten), 1895 le32_to_cpu(retbuf->TotalBytesWritten)); 1896 1897 /* 1898 * Check if this is the first request using these sizes, 1899 * (ie check if copy succeed once with original sizes 1900 * and check if the server gave us different sizes after 1901 * we already updated max sizes on previous request). 1902 * if not then why is the server returning an error now 1903 */ 1904 if ((chunks_copied != 0) || chunk_sizes_updated) 1905 goto cchunk_out; 1906 1907 /* Check that server is not asking us to grow size */ 1908 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1909 tcon->max_bytes_chunk) 1910 tcon->max_bytes_chunk = 1911 le32_to_cpu(retbuf->ChunkBytesWritten); 1912 else 1913 goto cchunk_out; /* server gave us bogus size */ 1914 1915 /* No need to change MaxChunks since already set to 1 */ 1916 chunk_sizes_updated = true; 1917 } else 1918 goto cchunk_out; 1919 } 1920 1921 cchunk_out: 1922 kfree(pcchunk); 1923 kfree(retbuf); 1924 if (rc) 1925 return rc; 1926 else 1927 return total_bytes_written; 1928 } 1929 1930 static int 1931 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1932 struct cifs_fid *fid) 1933 { 1934 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1935 } 1936 1937 static unsigned int 1938 smb2_read_data_offset(char *buf) 1939 { 1940 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1941 1942 return rsp->DataOffset; 1943 } 1944 1945 static unsigned int 1946 smb2_read_data_length(char *buf, bool in_remaining) 1947 { 1948 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1949 1950 if (in_remaining) 1951 return le32_to_cpu(rsp->DataRemaining); 1952 1953 return le32_to_cpu(rsp->DataLength); 1954 } 1955 1956 1957 static int 1958 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1959 struct cifs_io_parms *parms, unsigned int *bytes_read, 1960 char **buf, int *buf_type) 1961 { 1962 parms->persistent_fid = pfid->persistent_fid; 1963 parms->volatile_fid = pfid->volatile_fid; 1964 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1965 } 1966 1967 static int 1968 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1969 struct cifs_io_parms *parms, unsigned int *written, 1970 struct kvec *iov, unsigned long nr_segs) 1971 { 1972 1973 parms->persistent_fid = pfid->persistent_fid; 1974 parms->volatile_fid = pfid->volatile_fid; 1975 return SMB2_write(xid, parms, written, iov, nr_segs); 1976 } 1977 1978 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1979 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1980 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1981 { 1982 struct cifsInodeInfo *cifsi; 1983 int rc; 1984 1985 cifsi = CIFS_I(inode); 1986 1987 /* if file already sparse don't bother setting sparse again */ 1988 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1989 return true; /* already sparse */ 1990 1991 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1992 return true; /* already not sparse */ 1993 1994 /* 1995 * Can't check for sparse support on share the usual way via the 1996 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1997 * since Samba server doesn't set the flag on the share, yet 1998 * supports the set sparse FSCTL and returns sparse correctly 1999 * in the file attributes. If we fail setting sparse though we 2000 * mark that server does not support sparse files for this share 2001 * to avoid repeatedly sending the unsupported fsctl to server 2002 * if the file is repeatedly extended. 2003 */ 2004 if (tcon->broken_sparse_sup) 2005 return false; 2006 2007 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2008 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 2009 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 2010 if (rc) { 2011 tcon->broken_sparse_sup = true; 2012 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 2013 return false; 2014 } 2015 2016 if (setsparse) 2017 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 2018 else 2019 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 2020 2021 return true; 2022 } 2023 2024 static int 2025 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 2026 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 2027 { 2028 struct inode *inode; 2029 2030 /* 2031 * If extending file more than one page make sparse. Many Linux fs 2032 * make files sparse by default when extending via ftruncate 2033 */ 2034 inode = d_inode(cfile->dentry); 2035 2036 if (!set_alloc && (size > inode->i_size + 8192)) { 2037 __u8 set_sparse = 1; 2038 2039 /* whether set sparse succeeds or not, extend the file */ 2040 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 2041 } 2042 2043 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 2044 cfile->fid.volatile_fid, cfile->pid, size); 2045 } 2046 2047 static int 2048 smb2_duplicate_extents(const unsigned int xid, 2049 struct cifsFileInfo *srcfile, 2050 struct cifsFileInfo *trgtfile, u64 src_off, 2051 u64 len, u64 dest_off) 2052 { 2053 int rc; 2054 unsigned int ret_data_len; 2055 struct inode *inode; 2056 struct duplicate_extents_to_file dup_ext_buf; 2057 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2058 2059 /* server fileays advertise duplicate extent support with this flag */ 2060 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2061 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2062 return -EOPNOTSUPP; 2063 2064 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2065 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2066 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2067 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2068 dup_ext_buf.ByteCount = cpu_to_le64(len); 2069 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2070 src_off, dest_off, len); 2071 trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid, 2072 trgtfile->fid.volatile_fid, tcon->tid, 2073 tcon->ses->Suid, src_off, dest_off, len); 2074 inode = d_inode(trgtfile->dentry); 2075 if (inode->i_size < dest_off + len) { 2076 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2077 if (rc) 2078 goto duplicate_extents_out; 2079 2080 /* 2081 * Although also could set plausible allocation size (i_blocks) 2082 * here in addition to setting the file size, in reflink 2083 * it is likely that the target file is sparse. Its allocation 2084 * size will be queried on next revalidate, but it is important 2085 * to make sure that file's cached size is updated immediately 2086 */ 2087 netfs_resize_file(netfs_inode(inode), dest_off + len, true); 2088 cifs_setsize(inode, dest_off + len); 2089 } 2090 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2091 trgtfile->fid.volatile_fid, 2092 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2093 (char *)&dup_ext_buf, 2094 sizeof(struct duplicate_extents_to_file), 2095 CIFSMaxBufSize, NULL, 2096 &ret_data_len); 2097 2098 if (ret_data_len > 0) 2099 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2100 2101 duplicate_extents_out: 2102 if (rc) 2103 trace_smb3_clone_err(xid, srcfile->fid.volatile_fid, 2104 trgtfile->fid.volatile_fid, 2105 tcon->tid, tcon->ses->Suid, src_off, 2106 dest_off, len, rc); 2107 else 2108 trace_smb3_clone_done(xid, srcfile->fid.volatile_fid, 2109 trgtfile->fid.volatile_fid, tcon->tid, 2110 tcon->ses->Suid, src_off, dest_off, len); 2111 return rc; 2112 } 2113 2114 static int 2115 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2116 struct cifsFileInfo *cfile) 2117 { 2118 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2119 cfile->fid.volatile_fid); 2120 } 2121 2122 static int 2123 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2124 struct cifsFileInfo *cfile) 2125 { 2126 struct fsctl_set_integrity_information_req integr_info; 2127 unsigned int ret_data_len; 2128 2129 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2130 integr_info.Flags = 0; 2131 integr_info.Reserved = 0; 2132 2133 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2134 cfile->fid.volatile_fid, 2135 FSCTL_SET_INTEGRITY_INFORMATION, 2136 (char *)&integr_info, 2137 sizeof(struct fsctl_set_integrity_information_req), 2138 CIFSMaxBufSize, NULL, 2139 &ret_data_len); 2140 2141 } 2142 2143 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2144 #define GMT_TOKEN_SIZE 50 2145 2146 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2147 2148 /* 2149 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2150 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2151 */ 2152 static int 2153 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2154 struct cifsFileInfo *cfile, void __user *ioc_buf) 2155 { 2156 char *retbuf = NULL; 2157 unsigned int ret_data_len = 0; 2158 int rc; 2159 u32 max_response_size; 2160 struct smb_snapshot_array snapshot_in; 2161 2162 /* 2163 * On the first query to enumerate the list of snapshots available 2164 * for this volume the buffer begins with 0 (number of snapshots 2165 * which can be returned is zero since at that point we do not know 2166 * how big the buffer needs to be). On the second query, 2167 * it (ret_data_len) is set to number of snapshots so we can 2168 * know to set the maximum response size larger (see below). 2169 */ 2170 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2171 return -EFAULT; 2172 2173 /* 2174 * Note that for snapshot queries that servers like Azure expect that 2175 * the first query be minimal size (and just used to get the number/size 2176 * of previous versions) so response size must be specified as EXACTLY 2177 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2178 * of eight bytes. 2179 */ 2180 if (ret_data_len == 0) 2181 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2182 else 2183 max_response_size = CIFSMaxBufSize; 2184 2185 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2186 cfile->fid.volatile_fid, 2187 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2188 NULL, 0 /* no input data */, max_response_size, 2189 (char **)&retbuf, 2190 &ret_data_len); 2191 cifs_dbg(FYI, "enum snapshots ioctl returned %d and ret buflen is %d\n", 2192 rc, ret_data_len); 2193 if (rc) 2194 return rc; 2195 2196 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2197 /* Fixup buffer */ 2198 if (copy_from_user(&snapshot_in, ioc_buf, 2199 sizeof(struct smb_snapshot_array))) { 2200 rc = -EFAULT; 2201 kfree(retbuf); 2202 return rc; 2203 } 2204 2205 /* 2206 * Check for min size, ie not large enough to fit even one GMT 2207 * token (snapshot). On the first ioctl some users may pass in 2208 * smaller size (or zero) to simply get the size of the array 2209 * so the user space caller can allocate sufficient memory 2210 * and retry the ioctl again with larger array size sufficient 2211 * to hold all of the snapshot GMT tokens on the second try. 2212 */ 2213 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2214 ret_data_len = sizeof(struct smb_snapshot_array); 2215 2216 /* 2217 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2218 * the snapshot array (of 50 byte GMT tokens) each 2219 * representing an available previous version of the data 2220 */ 2221 if (ret_data_len > (snapshot_in.snapshot_array_size + 2222 sizeof(struct smb_snapshot_array))) 2223 ret_data_len = snapshot_in.snapshot_array_size + 2224 sizeof(struct smb_snapshot_array); 2225 2226 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2227 rc = -EFAULT; 2228 } 2229 2230 kfree(retbuf); 2231 return rc; 2232 } 2233 2234 2235 2236 static int 2237 smb3_notify(const unsigned int xid, struct file *pfile, 2238 void __user *ioc_buf, bool return_changes) 2239 { 2240 struct smb3_notify_info notify; 2241 struct smb3_notify_info __user *pnotify_buf; 2242 struct dentry *dentry = pfile->f_path.dentry; 2243 struct inode *inode = file_inode(pfile); 2244 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2245 struct cifs_open_parms oparms; 2246 struct cifs_fid fid; 2247 struct cifs_tcon *tcon; 2248 const unsigned char *path; 2249 char *returned_ioctl_info = NULL; 2250 void *page = alloc_dentry_path(); 2251 __le16 *utf16_path = NULL; 2252 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2253 int rc = 0; 2254 __u32 ret_len = 0; 2255 2256 path = build_path_from_dentry(dentry, page); 2257 if (IS_ERR(path)) { 2258 rc = PTR_ERR(path); 2259 goto notify_exit; 2260 } 2261 2262 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2263 if (utf16_path == NULL) { 2264 rc = -ENOMEM; 2265 goto notify_exit; 2266 } 2267 2268 if (return_changes) { 2269 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2270 rc = -EFAULT; 2271 goto notify_exit; 2272 } 2273 } else { 2274 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2275 rc = -EFAULT; 2276 goto notify_exit; 2277 } 2278 notify.data_len = 0; 2279 } 2280 2281 tcon = cifs_sb_master_tcon(cifs_sb); 2282 oparms = (struct cifs_open_parms) { 2283 .tcon = tcon, 2284 .path = path, 2285 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2286 .disposition = FILE_OPEN, 2287 .create_options = cifs_create_options(cifs_sb, 0), 2288 .fid = &fid, 2289 }; 2290 2291 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2292 NULL); 2293 if (rc) 2294 goto notify_exit; 2295 2296 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2297 notify.watch_tree, notify.completion_filter, 2298 notify.data_len, &returned_ioctl_info, &ret_len); 2299 2300 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2301 2302 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2303 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2304 if (ret_len > notify.data_len) 2305 ret_len = notify.data_len; 2306 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2307 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2308 rc = -EFAULT; 2309 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2310 rc = -EFAULT; 2311 } 2312 kfree(returned_ioctl_info); 2313 notify_exit: 2314 free_dentry_path(page); 2315 kfree(utf16_path); 2316 return rc; 2317 } 2318 2319 static int 2320 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2321 const char *path, struct cifs_sb_info *cifs_sb, 2322 struct cifs_fid *fid, __u16 search_flags, 2323 struct cifs_search_info *srch_inf) 2324 { 2325 __le16 *utf16_path; 2326 struct smb_rqst rqst[2]; 2327 struct kvec rsp_iov[2]; 2328 int resp_buftype[2]; 2329 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2330 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2331 int rc, flags = 0; 2332 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2333 struct cifs_open_parms oparms; 2334 struct smb2_query_directory_rsp *qd_rsp = NULL; 2335 struct smb2_create_rsp *op_rsp = NULL; 2336 struct TCP_Server_Info *server; 2337 int retries = 0, cur_sleep = 1; 2338 2339 replay_again: 2340 /* reinitialize for possible replay */ 2341 flags = 0; 2342 oplock = SMB2_OPLOCK_LEVEL_NONE; 2343 server = cifs_pick_channel(tcon->ses); 2344 2345 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2346 if (!utf16_path) 2347 return -ENOMEM; 2348 2349 if (smb3_encryption_required(tcon)) 2350 flags |= CIFS_TRANSFORM_REQ; 2351 2352 memset(rqst, 0, sizeof(rqst)); 2353 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2354 memset(rsp_iov, 0, sizeof(rsp_iov)); 2355 2356 /* Open */ 2357 memset(&open_iov, 0, sizeof(open_iov)); 2358 rqst[0].rq_iov = open_iov; 2359 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2360 2361 oparms = (struct cifs_open_parms) { 2362 .tcon = tcon, 2363 .path = path, 2364 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2365 .disposition = FILE_OPEN, 2366 .create_options = cifs_create_options(cifs_sb, 0), 2367 .fid = fid, 2368 .replay = !!(retries), 2369 }; 2370 2371 rc = SMB2_open_init(tcon, server, 2372 &rqst[0], &oplock, &oparms, utf16_path); 2373 if (rc) 2374 goto qdf_free; 2375 smb2_set_next_command(tcon, &rqst[0]); 2376 2377 /* Query directory */ 2378 srch_inf->entries_in_buffer = 0; 2379 srch_inf->index_of_last_entry = 2; 2380 2381 memset(&qd_iov, 0, sizeof(qd_iov)); 2382 rqst[1].rq_iov = qd_iov; 2383 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2384 2385 rc = SMB2_query_directory_init(xid, tcon, server, 2386 &rqst[1], 2387 COMPOUND_FID, COMPOUND_FID, 2388 0, srch_inf->info_level); 2389 if (rc) 2390 goto qdf_free; 2391 2392 smb2_set_related(&rqst[1]); 2393 2394 if (retries) { 2395 smb2_set_replay(server, &rqst[0]); 2396 smb2_set_replay(server, &rqst[1]); 2397 } 2398 2399 rc = compound_send_recv(xid, tcon->ses, server, 2400 flags, 2, rqst, 2401 resp_buftype, rsp_iov); 2402 2403 /* If the open failed there is nothing to do */ 2404 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2405 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2406 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2407 goto qdf_free; 2408 } 2409 fid->persistent_fid = op_rsp->PersistentFileId; 2410 fid->volatile_fid = op_rsp->VolatileFileId; 2411 2412 /* Anything else than ENODATA means a genuine error */ 2413 if (rc && rc != -ENODATA) { 2414 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2415 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2416 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2417 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2418 goto qdf_free; 2419 } 2420 2421 atomic_inc(&tcon->num_remote_opens); 2422 2423 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2424 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2425 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2426 tcon->tid, tcon->ses->Suid, 0, 0); 2427 srch_inf->endOfSearch = true; 2428 rc = 0; 2429 goto qdf_free; 2430 } 2431 2432 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2433 srch_inf); 2434 if (rc) { 2435 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2436 tcon->ses->Suid, 0, 0, rc); 2437 goto qdf_free; 2438 } 2439 resp_buftype[1] = CIFS_NO_BUFFER; 2440 2441 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2442 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2443 2444 qdf_free: 2445 kfree(utf16_path); 2446 SMB2_open_free(&rqst[0]); 2447 SMB2_query_directory_free(&rqst[1]); 2448 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2449 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2450 2451 if (is_replayable_error(rc) && 2452 smb2_should_replay(tcon, &retries, &cur_sleep)) 2453 goto replay_again; 2454 2455 return rc; 2456 } 2457 2458 static int 2459 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2460 struct cifs_fid *fid, __u16 search_flags, 2461 struct cifs_search_info *srch_inf) 2462 { 2463 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2464 fid->volatile_fid, 0, srch_inf); 2465 } 2466 2467 static int 2468 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2469 struct cifs_fid *fid) 2470 { 2471 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2472 } 2473 2474 /* 2475 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2476 * the number of credits and return true. Otherwise - return false. 2477 */ 2478 static bool 2479 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2480 { 2481 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2482 int scredits, in_flight; 2483 2484 if (shdr->Status != STATUS_PENDING) 2485 return false; 2486 2487 if (shdr->CreditRequest) { 2488 spin_lock(&server->req_lock); 2489 server->credits += le16_to_cpu(shdr->CreditRequest); 2490 scredits = server->credits; 2491 in_flight = server->in_flight; 2492 spin_unlock(&server->req_lock); 2493 wake_up(&server->request_q); 2494 2495 trace_smb3_pend_credits(server->CurrentMid, 2496 server->conn_id, server->hostname, scredits, 2497 le16_to_cpu(shdr->CreditRequest), in_flight); 2498 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2499 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2500 } 2501 2502 return true; 2503 } 2504 2505 static bool 2506 smb2_is_session_expired(char *buf) 2507 { 2508 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2509 2510 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2511 shdr->Status != STATUS_USER_SESSION_DELETED) 2512 return false; 2513 2514 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2515 le64_to_cpu(shdr->SessionId), 2516 le16_to_cpu(shdr->Command), 2517 le64_to_cpu(shdr->MessageId)); 2518 cifs_dbg(FYI, "Session expired or deleted\n"); 2519 2520 return true; 2521 } 2522 2523 static bool 2524 smb2_is_status_io_timeout(char *buf) 2525 { 2526 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2527 2528 if (shdr->Status == STATUS_IO_TIMEOUT) 2529 return true; 2530 else 2531 return false; 2532 } 2533 2534 static bool 2535 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2536 { 2537 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2538 struct TCP_Server_Info *pserver; 2539 struct cifs_ses *ses; 2540 struct cifs_tcon *tcon; 2541 2542 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2543 return false; 2544 2545 /* If server is a channel, select the primary channel */ 2546 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2547 2548 spin_lock(&cifs_tcp_ses_lock); 2549 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2550 if (cifs_ses_exiting(ses)) 2551 continue; 2552 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2553 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2554 spin_lock(&tcon->tc_lock); 2555 tcon->need_reconnect = true; 2556 spin_unlock(&tcon->tc_lock); 2557 spin_unlock(&cifs_tcp_ses_lock); 2558 pr_warn_once("Server share %s deleted.\n", 2559 tcon->tree_name); 2560 return true; 2561 } 2562 } 2563 } 2564 spin_unlock(&cifs_tcp_ses_lock); 2565 2566 return false; 2567 } 2568 2569 static int 2570 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2571 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2572 { 2573 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2574 return SMB2_lease_break(0, tcon, cinode->lease_key, 2575 smb2_get_lease_state(cinode)); 2576 2577 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2578 CIFS_CACHE_READ(cinode) ? 1 : 0); 2579 } 2580 2581 void 2582 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2583 { 2584 struct smb2_hdr *shdr; 2585 2586 if (server->dialect < SMB30_PROT_ID) 2587 return; 2588 2589 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2590 if (shdr == NULL) { 2591 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2592 return; 2593 } 2594 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2595 } 2596 2597 void 2598 smb2_set_related(struct smb_rqst *rqst) 2599 { 2600 struct smb2_hdr *shdr; 2601 2602 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2603 if (shdr == NULL) { 2604 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2605 return; 2606 } 2607 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2608 } 2609 2610 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2611 2612 void 2613 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2614 { 2615 struct smb2_hdr *shdr; 2616 struct cifs_ses *ses = tcon->ses; 2617 struct TCP_Server_Info *server = ses->server; 2618 unsigned long len = smb_rqst_len(server, rqst); 2619 int num_padding; 2620 2621 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2622 if (shdr == NULL) { 2623 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2624 return; 2625 } 2626 2627 /* SMB headers in a compound are 8 byte aligned. */ 2628 if (!IS_ALIGNED(len, 8)) { 2629 num_padding = 8 - (len & 7); 2630 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2631 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2632 rqst->rq_nvec++; 2633 len += num_padding; 2634 } 2635 shdr->NextCommand = cpu_to_le32(len); 2636 } 2637 2638 /* 2639 * helper function for exponential backoff and check if replayable 2640 */ 2641 bool smb2_should_replay(struct cifs_tcon *tcon, 2642 int *pretries, 2643 int *pcur_sleep) 2644 { 2645 if (!pretries || !pcur_sleep) 2646 return false; 2647 2648 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2649 msleep(*pcur_sleep); 2650 (*pcur_sleep) = ((*pcur_sleep) << 1); 2651 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2652 (*pcur_sleep) = CIFS_MAX_SLEEP; 2653 return true; 2654 } 2655 2656 return false; 2657 } 2658 2659 /* 2660 * Passes the query info response back to the caller on success. 2661 * Caller need to free this with free_rsp_buf(). 2662 */ 2663 int 2664 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2665 const char *path, u32 desired_access, 2666 u32 class, u32 type, u32 output_len, 2667 struct kvec *rsp, int *buftype, 2668 struct cifs_sb_info *cifs_sb) 2669 { 2670 struct smb2_compound_vars *vars; 2671 struct cifs_ses *ses = tcon->ses; 2672 struct TCP_Server_Info *server; 2673 int flags = CIFS_CP_CREATE_CLOSE_OP; 2674 struct smb_rqst *rqst; 2675 int resp_buftype[3]; 2676 struct kvec *rsp_iov; 2677 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2678 struct cifs_open_parms oparms; 2679 struct cifs_fid fid; 2680 int rc; 2681 __le16 *utf16_path; 2682 struct cached_fid *cfid = NULL; 2683 int retries = 0, cur_sleep = 1; 2684 2685 replay_again: 2686 /* reinitialize for possible replay */ 2687 flags = CIFS_CP_CREATE_CLOSE_OP; 2688 oplock = SMB2_OPLOCK_LEVEL_NONE; 2689 server = cifs_pick_channel(ses); 2690 2691 if (!path) 2692 path = ""; 2693 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2694 if (!utf16_path) 2695 return -ENOMEM; 2696 2697 if (smb3_encryption_required(tcon)) 2698 flags |= CIFS_TRANSFORM_REQ; 2699 2700 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2701 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2702 if (!vars) { 2703 rc = -ENOMEM; 2704 goto out_free_path; 2705 } 2706 rqst = vars->rqst; 2707 rsp_iov = vars->rsp_iov; 2708 2709 /* 2710 * We can only call this for things we know are directories. 2711 */ 2712 if (!strcmp(path, "")) 2713 open_cached_dir(xid, tcon, path, cifs_sb, false, 2714 &cfid); /* cfid null if open dir failed */ 2715 2716 rqst[0].rq_iov = vars->open_iov; 2717 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2718 2719 oparms = (struct cifs_open_parms) { 2720 .tcon = tcon, 2721 .path = path, 2722 .desired_access = desired_access, 2723 .disposition = FILE_OPEN, 2724 .create_options = cifs_create_options(cifs_sb, 0), 2725 .fid = &fid, 2726 .replay = !!(retries), 2727 }; 2728 2729 rc = SMB2_open_init(tcon, server, 2730 &rqst[0], &oplock, &oparms, utf16_path); 2731 if (rc) 2732 goto qic_exit; 2733 smb2_set_next_command(tcon, &rqst[0]); 2734 2735 rqst[1].rq_iov = &vars->qi_iov; 2736 rqst[1].rq_nvec = 1; 2737 2738 if (cfid) { 2739 rc = SMB2_query_info_init(tcon, server, 2740 &rqst[1], 2741 cfid->fid.persistent_fid, 2742 cfid->fid.volatile_fid, 2743 class, type, 0, 2744 output_len, 0, 2745 NULL); 2746 } else { 2747 rc = SMB2_query_info_init(tcon, server, 2748 &rqst[1], 2749 COMPOUND_FID, 2750 COMPOUND_FID, 2751 class, type, 0, 2752 output_len, 0, 2753 NULL); 2754 } 2755 if (rc) 2756 goto qic_exit; 2757 if (!cfid) { 2758 smb2_set_next_command(tcon, &rqst[1]); 2759 smb2_set_related(&rqst[1]); 2760 } 2761 2762 rqst[2].rq_iov = &vars->close_iov; 2763 rqst[2].rq_nvec = 1; 2764 2765 rc = SMB2_close_init(tcon, server, 2766 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2767 if (rc) 2768 goto qic_exit; 2769 smb2_set_related(&rqst[2]); 2770 2771 if (retries) { 2772 if (!cfid) { 2773 smb2_set_replay(server, &rqst[0]); 2774 smb2_set_replay(server, &rqst[2]); 2775 } 2776 smb2_set_replay(server, &rqst[1]); 2777 } 2778 2779 if (cfid) { 2780 rc = compound_send_recv(xid, ses, server, 2781 flags, 1, &rqst[1], 2782 &resp_buftype[1], &rsp_iov[1]); 2783 } else { 2784 rc = compound_send_recv(xid, ses, server, 2785 flags, 3, rqst, 2786 resp_buftype, rsp_iov); 2787 } 2788 if (rc) { 2789 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2790 if (rc == -EREMCHG) { 2791 tcon->need_reconnect = true; 2792 pr_warn_once("server share %s deleted\n", 2793 tcon->tree_name); 2794 } 2795 goto qic_exit; 2796 } 2797 *rsp = rsp_iov[1]; 2798 *buftype = resp_buftype[1]; 2799 2800 qic_exit: 2801 SMB2_open_free(&rqst[0]); 2802 SMB2_query_info_free(&rqst[1]); 2803 SMB2_close_free(&rqst[2]); 2804 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2805 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2806 if (cfid) 2807 close_cached_dir(cfid); 2808 kfree(vars); 2809 out_free_path: 2810 kfree(utf16_path); 2811 2812 if (is_replayable_error(rc) && 2813 smb2_should_replay(tcon, &retries, &cur_sleep)) 2814 goto replay_again; 2815 2816 return rc; 2817 } 2818 2819 static int 2820 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2821 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2822 { 2823 struct smb2_query_info_rsp *rsp; 2824 struct smb2_fs_full_size_info *info = NULL; 2825 struct kvec rsp_iov = {NULL, 0}; 2826 int buftype = CIFS_NO_BUFFER; 2827 int rc; 2828 2829 2830 rc = smb2_query_info_compound(xid, tcon, path, 2831 FILE_READ_ATTRIBUTES, 2832 FS_FULL_SIZE_INFORMATION, 2833 SMB2_O_INFO_FILESYSTEM, 2834 sizeof(struct smb2_fs_full_size_info), 2835 &rsp_iov, &buftype, cifs_sb); 2836 if (rc) 2837 goto qfs_exit; 2838 2839 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2840 buf->f_type = SMB2_SUPER_MAGIC; 2841 info = (struct smb2_fs_full_size_info *)( 2842 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2843 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2844 le32_to_cpu(rsp->OutputBufferLength), 2845 &rsp_iov, 2846 sizeof(struct smb2_fs_full_size_info)); 2847 if (!rc) 2848 smb2_copy_fs_info_to_kstatfs(info, buf); 2849 2850 qfs_exit: 2851 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2852 free_rsp_buf(buftype, rsp_iov.iov_base); 2853 return rc; 2854 } 2855 2856 static int 2857 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2858 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2859 { 2860 int rc; 2861 __le16 *utf16_path = NULL; 2862 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2863 struct cifs_open_parms oparms; 2864 struct cifs_fid fid; 2865 2866 if (!tcon->posix_extensions) 2867 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2868 2869 oparms = (struct cifs_open_parms) { 2870 .tcon = tcon, 2871 .path = path, 2872 .desired_access = FILE_READ_ATTRIBUTES, 2873 .disposition = FILE_OPEN, 2874 .create_options = cifs_create_options(cifs_sb, 0), 2875 .fid = &fid, 2876 }; 2877 2878 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2879 if (utf16_path == NULL) 2880 return -ENOMEM; 2881 2882 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 2883 NULL, NULL); 2884 kfree(utf16_path); 2885 if (rc) 2886 return rc; 2887 2888 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2889 fid.volatile_fid, buf); 2890 buf->f_type = SMB2_SUPER_MAGIC; 2891 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2892 return rc; 2893 } 2894 2895 static bool 2896 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2897 { 2898 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2899 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2900 } 2901 2902 static int 2903 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2904 __u64 length, __u32 type, int lock, int unlock, bool wait) 2905 { 2906 if (unlock && !lock) 2907 type = SMB2_LOCKFLAG_UNLOCK; 2908 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2909 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2910 current->tgid, length, offset, type, wait); 2911 } 2912 2913 static void 2914 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2915 { 2916 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2917 } 2918 2919 static void 2920 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2921 { 2922 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2923 } 2924 2925 static void 2926 smb2_new_lease_key(struct cifs_fid *fid) 2927 { 2928 generate_random_uuid(fid->lease_key); 2929 } 2930 2931 static int 2932 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2933 const char *search_name, 2934 struct dfs_info3_param **target_nodes, 2935 unsigned int *num_of_nodes, 2936 const struct nls_table *nls_codepage, int remap) 2937 { 2938 int rc; 2939 __le16 *utf16_path = NULL; 2940 int utf16_path_len = 0; 2941 struct cifs_tcon *tcon; 2942 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2943 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2944 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2945 int retry_once = 0; 2946 2947 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2948 2949 /* 2950 * Try to use the IPC tcon, otherwise just use any 2951 */ 2952 tcon = ses->tcon_ipc; 2953 if (tcon == NULL) { 2954 spin_lock(&cifs_tcp_ses_lock); 2955 tcon = list_first_entry_or_null(&ses->tcon_list, 2956 struct cifs_tcon, 2957 tcon_list); 2958 if (tcon) { 2959 tcon->tc_count++; 2960 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2961 netfs_trace_tcon_ref_get_dfs_refer); 2962 } 2963 spin_unlock(&cifs_tcp_ses_lock); 2964 } 2965 2966 if (tcon == NULL) { 2967 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2968 ses); 2969 rc = -ENOTCONN; 2970 goto out; 2971 } 2972 2973 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2974 &utf16_path_len, 2975 nls_codepage, remap); 2976 if (!utf16_path) { 2977 rc = -ENOMEM; 2978 goto out; 2979 } 2980 2981 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2982 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2983 if (!dfs_req) { 2984 rc = -ENOMEM; 2985 goto out; 2986 } 2987 2988 /* Highest DFS referral version understood */ 2989 dfs_req->MaxReferralLevel = DFS_VERSION; 2990 2991 /* Path to resolve in an UTF-16 null-terminated string */ 2992 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2993 2994 for (;;) { 2995 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2996 FSCTL_DFS_GET_REFERRALS, 2997 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2998 (char **)&dfs_rsp, &dfs_rsp_size); 2999 if (fatal_signal_pending(current)) { 3000 rc = -EINTR; 3001 break; 3002 } 3003 if (!is_retryable_error(rc) || retry_once++) 3004 break; 3005 usleep_range(512, 2048); 3006 } 3007 3008 if (!rc && !dfs_rsp) 3009 rc = -EIO; 3010 if (rc) { 3011 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 3012 cifs_tcon_dbg(FYI, "%s: ioctl error: rc=%d\n", __func__, rc); 3013 goto out; 3014 } 3015 3016 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 3017 num_of_nodes, target_nodes, 3018 nls_codepage, remap, search_name, 3019 true /* is_unicode */); 3020 if (rc && rc != -ENOENT) { 3021 cifs_tcon_dbg(VFS, "%s: failed to parse DFS referral %s: %d\n", 3022 __func__, search_name, rc); 3023 } 3024 3025 out: 3026 if (tcon && !tcon->ipc) { 3027 /* ipc tcons are not refcounted */ 3028 spin_lock(&cifs_tcp_ses_lock); 3029 tcon->tc_count--; 3030 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3031 netfs_trace_tcon_ref_dec_dfs_refer); 3032 /* tc_count can never go negative */ 3033 WARN_ON(tcon->tc_count < 0); 3034 spin_unlock(&cifs_tcp_ses_lock); 3035 } 3036 kfree(utf16_path); 3037 kfree(dfs_req); 3038 kfree(dfs_rsp); 3039 return rc; 3040 } 3041 3042 static struct smb_ntsd * 3043 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3044 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3045 { 3046 struct smb_ntsd *pntsd = NULL; 3047 unsigned int xid; 3048 int rc = -EOPNOTSUPP; 3049 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3050 3051 if (IS_ERR(tlink)) 3052 return ERR_CAST(tlink); 3053 3054 xid = get_xid(); 3055 cifs_dbg(FYI, "trying to get acl\n"); 3056 3057 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3058 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3059 info); 3060 free_xid(xid); 3061 3062 cifs_put_tlink(tlink); 3063 3064 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3065 if (rc) 3066 return ERR_PTR(rc); 3067 return pntsd; 3068 3069 } 3070 3071 static struct smb_ntsd * 3072 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3073 const char *path, u32 *pacllen, u32 info) 3074 { 3075 struct smb_ntsd *pntsd = NULL; 3076 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3077 unsigned int xid; 3078 int rc; 3079 struct cifs_tcon *tcon; 3080 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3081 struct cifs_fid fid; 3082 struct cifs_open_parms oparms; 3083 __le16 *utf16_path; 3084 3085 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3086 if (IS_ERR(tlink)) 3087 return ERR_CAST(tlink); 3088 3089 tcon = tlink_tcon(tlink); 3090 xid = get_xid(); 3091 3092 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3093 if (!utf16_path) { 3094 rc = -ENOMEM; 3095 free_xid(xid); 3096 return ERR_PTR(rc); 3097 } 3098 3099 oparms = (struct cifs_open_parms) { 3100 .tcon = tcon, 3101 .path = path, 3102 .desired_access = READ_CONTROL, 3103 .disposition = FILE_OPEN, 3104 /* 3105 * When querying an ACL, even if the file is a symlink 3106 * we want to open the source not the target, and so 3107 * the protocol requires that the client specify this 3108 * flag when opening a reparse point 3109 */ 3110 .create_options = cifs_create_options(cifs_sb, 0) | 3111 OPEN_REPARSE_POINT, 3112 .fid = &fid, 3113 }; 3114 3115 if (info & SACL_SECINFO) 3116 oparms.desired_access |= SYSTEM_SECURITY; 3117 3118 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3119 NULL); 3120 kfree(utf16_path); 3121 if (!rc) { 3122 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3123 fid.volatile_fid, (void **)&pntsd, pacllen, 3124 info); 3125 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3126 } 3127 3128 cifs_put_tlink(tlink); 3129 free_xid(xid); 3130 3131 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3132 if (rc) 3133 return ERR_PTR(rc); 3134 return pntsd; 3135 } 3136 3137 static int 3138 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, 3139 struct inode *inode, const char *path, int aclflag) 3140 { 3141 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3142 unsigned int xid; 3143 int rc, access_flags = 0; 3144 struct cifs_tcon *tcon; 3145 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3146 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3147 struct cifs_fid fid; 3148 struct cifs_open_parms oparms; 3149 __le16 *utf16_path; 3150 3151 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3152 if (IS_ERR(tlink)) 3153 return PTR_ERR(tlink); 3154 3155 tcon = tlink_tcon(tlink); 3156 xid = get_xid(); 3157 3158 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3159 access_flags |= WRITE_OWNER; 3160 if (aclflag & CIFS_ACL_SACL) 3161 access_flags |= SYSTEM_SECURITY; 3162 if (aclflag & CIFS_ACL_DACL) 3163 access_flags |= WRITE_DAC; 3164 3165 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3166 if (!utf16_path) { 3167 rc = -ENOMEM; 3168 free_xid(xid); 3169 return rc; 3170 } 3171 3172 oparms = (struct cifs_open_parms) { 3173 .tcon = tcon, 3174 .desired_access = access_flags, 3175 .create_options = cifs_create_options(cifs_sb, 0), 3176 .disposition = FILE_OPEN, 3177 .path = path, 3178 .fid = &fid, 3179 }; 3180 3181 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3182 NULL, NULL); 3183 kfree(utf16_path); 3184 if (!rc) { 3185 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3186 fid.volatile_fid, pnntsd, acllen, aclflag); 3187 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3188 } 3189 3190 cifs_put_tlink(tlink); 3191 free_xid(xid); 3192 return rc; 3193 } 3194 3195 /* Retrieve an ACL from the server */ 3196 static struct smb_ntsd * 3197 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3198 struct inode *inode, const char *path, 3199 u32 *pacllen, u32 info) 3200 { 3201 struct smb_ntsd *pntsd = NULL; 3202 struct cifsFileInfo *open_file = NULL; 3203 3204 if (inode && !(info & SACL_SECINFO)) 3205 open_file = find_readable_file(CIFS_I(inode), true); 3206 if (!open_file || (info & SACL_SECINFO)) 3207 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3208 3209 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3210 cifsFileInfo_put(open_file); 3211 return pntsd; 3212 } 3213 3214 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3215 loff_t offset, loff_t len, unsigned int xid) 3216 { 3217 struct cifsFileInfo *cfile = file->private_data; 3218 struct file_zero_data_information fsctl_buf; 3219 3220 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3221 3222 fsctl_buf.FileOffset = cpu_to_le64(offset); 3223 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3224 3225 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3226 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3227 (char *)&fsctl_buf, 3228 sizeof(struct file_zero_data_information), 3229 0, NULL, NULL); 3230 } 3231 3232 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3233 unsigned long long offset, unsigned long long len, 3234 bool keep_size) 3235 { 3236 struct cifs_ses *ses = tcon->ses; 3237 struct inode *inode = file_inode(file); 3238 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3239 struct cifsFileInfo *cfile = file->private_data; 3240 struct netfs_inode *ictx = netfs_inode(inode); 3241 unsigned long long i_size, new_size, remote_size; 3242 long rc; 3243 unsigned int xid; 3244 3245 xid = get_xid(); 3246 3247 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3248 ses->Suid, offset, len); 3249 3250 inode_lock(inode); 3251 filemap_invalidate_lock(inode->i_mapping); 3252 3253 i_size = i_size_read(inode); 3254 remote_size = ictx->remote_i_size; 3255 if (offset + len >= remote_size && offset < i_size) { 3256 unsigned long long top = umin(offset + len, i_size); 3257 3258 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3259 if (rc < 0) 3260 goto zero_range_exit; 3261 } 3262 3263 /* 3264 * We zero the range through ioctl, so we need remove the page caches 3265 * first, otherwise the data may be inconsistent with the server. 3266 */ 3267 truncate_pagecache_range(inode, offset, offset + len - 1); 3268 3269 /* if file not oplocked can't be sure whether asking to extend size */ 3270 rc = -EOPNOTSUPP; 3271 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3272 goto zero_range_exit; 3273 3274 rc = smb3_zero_data(file, tcon, offset, len, xid); 3275 if (rc < 0) 3276 goto zero_range_exit; 3277 3278 /* 3279 * do we also need to change the size of the file? 3280 */ 3281 new_size = offset + len; 3282 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3283 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3284 cfile->fid.volatile_fid, cfile->pid, new_size); 3285 if (rc >= 0) { 3286 truncate_setsize(inode, new_size); 3287 netfs_resize_file(&cifsi->netfs, new_size, true); 3288 if (offset < cifsi->netfs.zero_point) 3289 cifsi->netfs.zero_point = offset; 3290 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3291 } 3292 } 3293 3294 zero_range_exit: 3295 filemap_invalidate_unlock(inode->i_mapping); 3296 inode_unlock(inode); 3297 free_xid(xid); 3298 if (rc) 3299 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3300 ses->Suid, offset, len, rc); 3301 else 3302 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3303 ses->Suid, offset, len); 3304 return rc; 3305 } 3306 3307 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3308 loff_t offset, loff_t len) 3309 { 3310 struct inode *inode = file_inode(file); 3311 struct cifsFileInfo *cfile = file->private_data; 3312 struct file_zero_data_information fsctl_buf; 3313 unsigned long long end = offset + len, i_size, remote_i_size; 3314 long rc; 3315 unsigned int xid; 3316 __u8 set_sparse = 1; 3317 3318 xid = get_xid(); 3319 3320 inode_lock(inode); 3321 /* Need to make file sparse, if not already, before freeing range. */ 3322 /* Consider adding equivalent for compressed since it could also work */ 3323 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3324 rc = -EOPNOTSUPP; 3325 goto out; 3326 } 3327 3328 filemap_invalidate_lock(inode->i_mapping); 3329 /* 3330 * We implement the punch hole through ioctl, so we need remove the page 3331 * caches first, otherwise the data may be inconsistent with the server. 3332 */ 3333 truncate_pagecache_range(inode, offset, offset + len - 1); 3334 3335 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3336 3337 fsctl_buf.FileOffset = cpu_to_le64(offset); 3338 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3339 3340 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3341 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3342 (char *)&fsctl_buf, 3343 sizeof(struct file_zero_data_information), 3344 CIFSMaxBufSize, NULL, NULL); 3345 3346 if (rc) 3347 goto unlock; 3348 3349 /* If there's dirty data in the buffer that would extend the EOF if it 3350 * were written, then we need to move the EOF marker over to the lower 3351 * of the high end of the hole and the proposed EOF. The problem is 3352 * that we locally hole-punch the tail of the dirty data, the proposed 3353 * EOF update will end up in the wrong place. 3354 */ 3355 i_size = i_size_read(inode); 3356 remote_i_size = netfs_inode(inode)->remote_i_size; 3357 if (end > remote_i_size && i_size > remote_i_size) { 3358 unsigned long long extend_to = umin(end, i_size); 3359 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3360 cfile->fid.volatile_fid, cfile->pid, extend_to); 3361 if (rc >= 0) 3362 netfs_inode(inode)->remote_i_size = extend_to; 3363 } 3364 3365 unlock: 3366 filemap_invalidate_unlock(inode->i_mapping); 3367 out: 3368 inode_unlock(inode); 3369 free_xid(xid); 3370 return rc; 3371 } 3372 3373 static int smb3_simple_fallocate_write_range(unsigned int xid, 3374 struct cifs_tcon *tcon, 3375 struct cifsFileInfo *cfile, 3376 loff_t off, loff_t len, 3377 char *buf) 3378 { 3379 struct cifs_io_parms io_parms = {0}; 3380 int nbytes; 3381 int rc = 0; 3382 struct kvec iov[2]; 3383 3384 io_parms.netfid = cfile->fid.netfid; 3385 io_parms.pid = current->tgid; 3386 io_parms.tcon = tcon; 3387 io_parms.persistent_fid = cfile->fid.persistent_fid; 3388 io_parms.volatile_fid = cfile->fid.volatile_fid; 3389 3390 while (len) { 3391 io_parms.offset = off; 3392 io_parms.length = len; 3393 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3394 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3395 /* iov[0] is reserved for smb header */ 3396 iov[1].iov_base = buf; 3397 iov[1].iov_len = io_parms.length; 3398 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3399 if (rc) 3400 break; 3401 if (nbytes > len) 3402 return -EINVAL; 3403 buf += nbytes; 3404 off += nbytes; 3405 len -= nbytes; 3406 } 3407 return rc; 3408 } 3409 3410 static int smb3_simple_fallocate_range(unsigned int xid, 3411 struct cifs_tcon *tcon, 3412 struct cifsFileInfo *cfile, 3413 loff_t off, loff_t len) 3414 { 3415 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3416 u32 out_data_len; 3417 char *buf = NULL; 3418 loff_t l; 3419 int rc; 3420 3421 in_data.file_offset = cpu_to_le64(off); 3422 in_data.length = cpu_to_le64(len); 3423 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3424 cfile->fid.volatile_fid, 3425 FSCTL_QUERY_ALLOCATED_RANGES, 3426 (char *)&in_data, sizeof(in_data), 3427 1024 * sizeof(struct file_allocated_range_buffer), 3428 (char **)&out_data, &out_data_len); 3429 if (rc) 3430 goto out; 3431 3432 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3433 if (buf == NULL) { 3434 rc = -ENOMEM; 3435 goto out; 3436 } 3437 3438 tmp_data = out_data; 3439 while (len) { 3440 /* 3441 * The rest of the region is unmapped so write it all. 3442 */ 3443 if (out_data_len == 0) { 3444 rc = smb3_simple_fallocate_write_range(xid, tcon, 3445 cfile, off, len, buf); 3446 goto out; 3447 } 3448 3449 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3450 rc = -EINVAL; 3451 goto out; 3452 } 3453 3454 if (off < le64_to_cpu(tmp_data->file_offset)) { 3455 /* 3456 * We are at a hole. Write until the end of the region 3457 * or until the next allocated data, 3458 * whichever comes next. 3459 */ 3460 l = le64_to_cpu(tmp_data->file_offset) - off; 3461 if (len < l) 3462 l = len; 3463 rc = smb3_simple_fallocate_write_range(xid, tcon, 3464 cfile, off, l, buf); 3465 if (rc) 3466 goto out; 3467 off = off + l; 3468 len = len - l; 3469 if (len == 0) 3470 goto out; 3471 } 3472 /* 3473 * We are at a section of allocated data, just skip forward 3474 * until the end of the data or the end of the region 3475 * we are supposed to fallocate, whichever comes first. 3476 */ 3477 l = le64_to_cpu(tmp_data->length); 3478 if (len < l) 3479 l = len; 3480 off += l; 3481 len -= l; 3482 3483 tmp_data = &tmp_data[1]; 3484 out_data_len -= sizeof(struct file_allocated_range_buffer); 3485 } 3486 3487 out: 3488 kfree(out_data); 3489 kfree(buf); 3490 return rc; 3491 } 3492 3493 3494 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3495 loff_t off, loff_t len, bool keep_size) 3496 { 3497 struct inode *inode; 3498 struct cifsInodeInfo *cifsi; 3499 struct cifsFileInfo *cfile = file->private_data; 3500 long rc = -EOPNOTSUPP; 3501 unsigned int xid; 3502 loff_t new_eof; 3503 3504 xid = get_xid(); 3505 3506 inode = d_inode(cfile->dentry); 3507 cifsi = CIFS_I(inode); 3508 3509 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3510 tcon->ses->Suid, off, len); 3511 /* if file not oplocked can't be sure whether asking to extend size */ 3512 if (!CIFS_CACHE_READ(cifsi)) 3513 if (keep_size == false) { 3514 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3515 tcon->tid, tcon->ses->Suid, off, len, rc); 3516 free_xid(xid); 3517 return rc; 3518 } 3519 3520 /* 3521 * Extending the file 3522 */ 3523 if ((keep_size == false) && i_size_read(inode) < off + len) { 3524 rc = inode_newsize_ok(inode, off + len); 3525 if (rc) 3526 goto out; 3527 3528 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3529 smb2_set_sparse(xid, tcon, cfile, inode, false); 3530 3531 new_eof = off + len; 3532 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3533 cfile->fid.volatile_fid, cfile->pid, new_eof); 3534 if (rc == 0) { 3535 netfs_resize_file(&cifsi->netfs, new_eof, true); 3536 cifs_setsize(inode, new_eof); 3537 } 3538 goto out; 3539 } 3540 3541 /* 3542 * Files are non-sparse by default so falloc may be a no-op 3543 * Must check if file sparse. If not sparse, and since we are not 3544 * extending then no need to do anything since file already allocated 3545 */ 3546 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3547 rc = 0; 3548 goto out; 3549 } 3550 3551 if (keep_size == true) { 3552 /* 3553 * We can not preallocate pages beyond the end of the file 3554 * in SMB2 3555 */ 3556 if (off >= i_size_read(inode)) { 3557 rc = 0; 3558 goto out; 3559 } 3560 /* 3561 * For fallocates that are partially beyond the end of file, 3562 * clamp len so we only fallocate up to the end of file. 3563 */ 3564 if (off + len > i_size_read(inode)) { 3565 len = i_size_read(inode) - off; 3566 } 3567 } 3568 3569 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3570 /* 3571 * At this point, we are trying to fallocate an internal 3572 * regions of a sparse file. Since smb2 does not have a 3573 * fallocate command we have two options on how to emulate this. 3574 * We can either turn the entire file to become non-sparse 3575 * which we only do if the fallocate is for virtually 3576 * the whole file, or we can overwrite the region with zeroes 3577 * using SMB2_write, which could be prohibitevly expensive 3578 * if len is large. 3579 */ 3580 /* 3581 * We are only trying to fallocate a small region so 3582 * just write it with zero. 3583 */ 3584 if (len <= 1024 * 1024) { 3585 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3586 off, len); 3587 goto out; 3588 } 3589 3590 /* 3591 * Check if falloc starts within first few pages of file 3592 * and ends within a few pages of the end of file to 3593 * ensure that most of file is being forced to be 3594 * fallocated now. If so then setting whole file sparse 3595 * ie potentially making a few extra pages at the beginning 3596 * or end of the file non-sparse via set_sparse is harmless. 3597 */ 3598 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3599 rc = -EOPNOTSUPP; 3600 goto out; 3601 } 3602 } 3603 3604 smb2_set_sparse(xid, tcon, cfile, inode, false); 3605 rc = 0; 3606 3607 out: 3608 if (rc) 3609 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3610 tcon->ses->Suid, off, len, rc); 3611 else 3612 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3613 tcon->ses->Suid, off, len); 3614 3615 free_xid(xid); 3616 return rc; 3617 } 3618 3619 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3620 loff_t off, loff_t len) 3621 { 3622 int rc; 3623 unsigned int xid; 3624 struct inode *inode = file_inode(file); 3625 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3626 struct cifsFileInfo *cfile = file->private_data; 3627 struct netfs_inode *ictx = &cifsi->netfs; 3628 loff_t old_eof, new_eof; 3629 3630 xid = get_xid(); 3631 3632 inode_lock(inode); 3633 3634 old_eof = i_size_read(inode); 3635 if ((off >= old_eof) || 3636 off + len >= old_eof) { 3637 rc = -EINVAL; 3638 goto out; 3639 } 3640 3641 filemap_invalidate_lock(inode->i_mapping); 3642 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3643 if (rc < 0) 3644 goto out_2; 3645 3646 truncate_pagecache_range(inode, off, old_eof); 3647 ictx->zero_point = old_eof; 3648 3649 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3650 old_eof - off - len, off); 3651 if (rc < 0) 3652 goto out_2; 3653 3654 new_eof = old_eof - len; 3655 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3656 cfile->fid.volatile_fid, cfile->pid, new_eof); 3657 if (rc < 0) 3658 goto out_2; 3659 3660 rc = 0; 3661 3662 truncate_setsize(inode, new_eof); 3663 netfs_resize_file(&cifsi->netfs, new_eof, true); 3664 ictx->zero_point = new_eof; 3665 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3666 out_2: 3667 filemap_invalidate_unlock(inode->i_mapping); 3668 out: 3669 inode_unlock(inode); 3670 free_xid(xid); 3671 return rc; 3672 } 3673 3674 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3675 loff_t off, loff_t len) 3676 { 3677 int rc; 3678 unsigned int xid; 3679 struct cifsFileInfo *cfile = file->private_data; 3680 struct inode *inode = file_inode(file); 3681 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3682 __u64 count, old_eof, new_eof; 3683 3684 xid = get_xid(); 3685 3686 inode_lock(inode); 3687 3688 old_eof = i_size_read(inode); 3689 if (off >= old_eof) { 3690 rc = -EINVAL; 3691 goto out; 3692 } 3693 3694 count = old_eof - off; 3695 new_eof = old_eof + len; 3696 3697 filemap_invalidate_lock(inode->i_mapping); 3698 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3699 if (rc < 0) 3700 goto out_2; 3701 truncate_pagecache_range(inode, off, old_eof); 3702 3703 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3704 cfile->fid.volatile_fid, cfile->pid, new_eof); 3705 if (rc < 0) 3706 goto out_2; 3707 3708 truncate_setsize(inode, new_eof); 3709 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3710 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3711 3712 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3713 if (rc < 0) 3714 goto out_2; 3715 cifsi->netfs.zero_point = new_eof; 3716 3717 rc = smb3_zero_data(file, tcon, off, len, xid); 3718 if (rc < 0) 3719 goto out_2; 3720 3721 rc = 0; 3722 out_2: 3723 filemap_invalidate_unlock(inode->i_mapping); 3724 out: 3725 inode_unlock(inode); 3726 free_xid(xid); 3727 return rc; 3728 } 3729 3730 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3731 { 3732 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3733 struct cifsInodeInfo *cifsi; 3734 struct inode *inode; 3735 int rc = 0; 3736 struct file_allocated_range_buffer in_data, *out_data = NULL; 3737 u32 out_data_len; 3738 unsigned int xid; 3739 3740 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3741 return generic_file_llseek(file, offset, whence); 3742 3743 inode = d_inode(cfile->dentry); 3744 cifsi = CIFS_I(inode); 3745 3746 if (offset < 0 || offset >= i_size_read(inode)) 3747 return -ENXIO; 3748 3749 xid = get_xid(); 3750 /* 3751 * We need to be sure that all dirty pages are written as they 3752 * might fill holes on the server. 3753 * Note that we also MUST flush any written pages since at least 3754 * some servers (Windows2016) will not reflect recent writes in 3755 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3756 */ 3757 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3758 if (wrcfile) { 3759 filemap_write_and_wait(inode->i_mapping); 3760 smb2_flush_file(xid, tcon, &wrcfile->fid); 3761 cifsFileInfo_put(wrcfile); 3762 } 3763 3764 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3765 if (whence == SEEK_HOLE) 3766 offset = i_size_read(inode); 3767 goto lseek_exit; 3768 } 3769 3770 in_data.file_offset = cpu_to_le64(offset); 3771 in_data.length = cpu_to_le64(i_size_read(inode)); 3772 3773 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3774 cfile->fid.volatile_fid, 3775 FSCTL_QUERY_ALLOCATED_RANGES, 3776 (char *)&in_data, sizeof(in_data), 3777 sizeof(struct file_allocated_range_buffer), 3778 (char **)&out_data, &out_data_len); 3779 if (rc == -E2BIG) 3780 rc = 0; 3781 if (rc) 3782 goto lseek_exit; 3783 3784 if (whence == SEEK_HOLE && out_data_len == 0) 3785 goto lseek_exit; 3786 3787 if (whence == SEEK_DATA && out_data_len == 0) { 3788 rc = -ENXIO; 3789 goto lseek_exit; 3790 } 3791 3792 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3793 rc = -EINVAL; 3794 goto lseek_exit; 3795 } 3796 if (whence == SEEK_DATA) { 3797 offset = le64_to_cpu(out_data->file_offset); 3798 goto lseek_exit; 3799 } 3800 if (offset < le64_to_cpu(out_data->file_offset)) 3801 goto lseek_exit; 3802 3803 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3804 3805 lseek_exit: 3806 free_xid(xid); 3807 kfree(out_data); 3808 if (!rc) 3809 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3810 else 3811 return rc; 3812 } 3813 3814 static int smb3_fiemap(struct cifs_tcon *tcon, 3815 struct cifsFileInfo *cfile, 3816 struct fiemap_extent_info *fei, u64 start, u64 len) 3817 { 3818 unsigned int xid; 3819 struct file_allocated_range_buffer in_data, *out_data; 3820 u32 out_data_len; 3821 int i, num, rc, flags, last_blob; 3822 u64 next; 3823 3824 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3825 if (rc) 3826 return rc; 3827 3828 xid = get_xid(); 3829 again: 3830 in_data.file_offset = cpu_to_le64(start); 3831 in_data.length = cpu_to_le64(len); 3832 3833 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3834 cfile->fid.volatile_fid, 3835 FSCTL_QUERY_ALLOCATED_RANGES, 3836 (char *)&in_data, sizeof(in_data), 3837 1024 * sizeof(struct file_allocated_range_buffer), 3838 (char **)&out_data, &out_data_len); 3839 if (rc == -E2BIG) { 3840 last_blob = 0; 3841 rc = 0; 3842 } else 3843 last_blob = 1; 3844 if (rc) 3845 goto out; 3846 3847 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3848 rc = -EINVAL; 3849 goto out; 3850 } 3851 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3852 rc = -EINVAL; 3853 goto out; 3854 } 3855 3856 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3857 for (i = 0; i < num; i++) { 3858 flags = 0; 3859 if (i == num - 1 && last_blob) 3860 flags |= FIEMAP_EXTENT_LAST; 3861 3862 rc = fiemap_fill_next_extent(fei, 3863 le64_to_cpu(out_data[i].file_offset), 3864 le64_to_cpu(out_data[i].file_offset), 3865 le64_to_cpu(out_data[i].length), 3866 flags); 3867 if (rc < 0) 3868 goto out; 3869 if (rc == 1) { 3870 rc = 0; 3871 goto out; 3872 } 3873 } 3874 3875 if (!last_blob) { 3876 next = le64_to_cpu(out_data[num - 1].file_offset) + 3877 le64_to_cpu(out_data[num - 1].length); 3878 len = len - (next - start); 3879 start = next; 3880 goto again; 3881 } 3882 3883 out: 3884 free_xid(xid); 3885 kfree(out_data); 3886 return rc; 3887 } 3888 3889 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3890 loff_t off, loff_t len) 3891 { 3892 /* KEEP_SIZE already checked for by do_fallocate */ 3893 if (mode & FALLOC_FL_PUNCH_HOLE) 3894 return smb3_punch_hole(file, tcon, off, len); 3895 else if (mode & FALLOC_FL_ZERO_RANGE) { 3896 if (mode & FALLOC_FL_KEEP_SIZE) 3897 return smb3_zero_range(file, tcon, off, len, true); 3898 return smb3_zero_range(file, tcon, off, len, false); 3899 } else if (mode == FALLOC_FL_KEEP_SIZE) 3900 return smb3_simple_falloc(file, tcon, off, len, true); 3901 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3902 return smb3_collapse_range(file, tcon, off, len); 3903 else if (mode == FALLOC_FL_INSERT_RANGE) 3904 return smb3_insert_range(file, tcon, off, len); 3905 else if (mode == 0) 3906 return smb3_simple_falloc(file, tcon, off, len, false); 3907 3908 return -EOPNOTSUPP; 3909 } 3910 3911 static void 3912 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3913 struct cifsInodeInfo *cinode, __u32 oplock, 3914 __u16 epoch, bool *purge_cache) 3915 { 3916 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3917 } 3918 3919 static void 3920 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3921 __u16 epoch, bool *purge_cache); 3922 3923 static void 3924 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3925 struct cifsInodeInfo *cinode, __u32 oplock, 3926 __u16 epoch, bool *purge_cache) 3927 { 3928 unsigned int old_state = cinode->oplock; 3929 __u16 old_epoch = cinode->epoch; 3930 unsigned int new_state; 3931 3932 if (epoch > old_epoch) { 3933 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3934 cinode->epoch = epoch; 3935 } 3936 3937 new_state = cinode->oplock; 3938 *purge_cache = false; 3939 3940 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3941 (new_state & CIFS_CACHE_READ_FLG) == 0) 3942 *purge_cache = true; 3943 else if (old_state == new_state && (epoch - old_epoch > 1)) 3944 *purge_cache = true; 3945 } 3946 3947 static void 3948 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3949 __u16 epoch, bool *purge_cache) 3950 { 3951 oplock &= 0xFF; 3952 cinode->lease_granted = false; 3953 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3954 return; 3955 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3956 cinode->oplock = CIFS_CACHE_RHW_FLG; 3957 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3958 &cinode->netfs.inode); 3959 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3960 cinode->oplock = CIFS_CACHE_RW_FLG; 3961 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3962 &cinode->netfs.inode); 3963 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3964 cinode->oplock = CIFS_CACHE_READ_FLG; 3965 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3966 &cinode->netfs.inode); 3967 } else 3968 cinode->oplock = 0; 3969 } 3970 3971 static void 3972 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3973 __u16 epoch, bool *purge_cache) 3974 { 3975 char message[5] = {0}; 3976 unsigned int new_oplock = 0; 3977 3978 oplock &= 0xFF; 3979 cinode->lease_granted = true; 3980 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3981 return; 3982 3983 /* Check if the server granted an oplock rather than a lease */ 3984 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3985 return smb2_set_oplock_level(cinode, oplock, epoch, 3986 purge_cache); 3987 3988 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3989 new_oplock |= CIFS_CACHE_READ_FLG; 3990 strcat(message, "R"); 3991 } 3992 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3993 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3994 strcat(message, "H"); 3995 } 3996 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3997 new_oplock |= CIFS_CACHE_WRITE_FLG; 3998 strcat(message, "W"); 3999 } 4000 if (!new_oplock) 4001 strscpy(message, "None"); 4002 4003 cinode->oplock = new_oplock; 4004 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4005 &cinode->netfs.inode); 4006 } 4007 4008 static void 4009 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4010 __u16 epoch, bool *purge_cache) 4011 { 4012 unsigned int old_oplock = cinode->oplock; 4013 4014 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4015 4016 if (purge_cache) { 4017 *purge_cache = false; 4018 if (old_oplock == CIFS_CACHE_READ_FLG) { 4019 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4020 (epoch - cinode->epoch > 0)) 4021 *purge_cache = true; 4022 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4023 (epoch - cinode->epoch > 1)) 4024 *purge_cache = true; 4025 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4026 (epoch - cinode->epoch > 1)) 4027 *purge_cache = true; 4028 else if (cinode->oplock == 0 && 4029 (epoch - cinode->epoch > 0)) 4030 *purge_cache = true; 4031 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4032 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4033 (epoch - cinode->epoch > 0)) 4034 *purge_cache = true; 4035 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4036 (epoch - cinode->epoch > 1)) 4037 *purge_cache = true; 4038 } 4039 cinode->epoch = epoch; 4040 } 4041 } 4042 4043 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4044 static bool 4045 smb2_is_read_op(__u32 oplock) 4046 { 4047 return oplock == SMB2_OPLOCK_LEVEL_II; 4048 } 4049 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4050 4051 static bool 4052 smb21_is_read_op(__u32 oplock) 4053 { 4054 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4055 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4056 } 4057 4058 static __le32 4059 map_oplock_to_lease(u8 oplock) 4060 { 4061 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4062 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4063 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4064 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4065 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4066 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4067 SMB2_LEASE_WRITE_CACHING_LE; 4068 return 0; 4069 } 4070 4071 static char * 4072 smb2_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4073 { 4074 struct create_lease *buf; 4075 4076 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4077 if (!buf) 4078 return NULL; 4079 4080 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4081 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4082 4083 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4084 (struct create_lease, lcontext)); 4085 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4086 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4087 (struct create_lease, Name)); 4088 buf->ccontext.NameLength = cpu_to_le16(4); 4089 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4090 buf->Name[0] = 'R'; 4091 buf->Name[1] = 'q'; 4092 buf->Name[2] = 'L'; 4093 buf->Name[3] = 's'; 4094 return (char *)buf; 4095 } 4096 4097 static char * 4098 smb3_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4099 { 4100 struct create_lease_v2 *buf; 4101 4102 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4103 if (!buf) 4104 return NULL; 4105 4106 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4107 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4108 buf->lcontext.LeaseFlags = flags; 4109 if (flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 4110 memcpy(&buf->lcontext.ParentLeaseKey, parent_lease_key, SMB2_LEASE_KEY_SIZE); 4111 4112 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4113 (struct create_lease_v2, lcontext)); 4114 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4115 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4116 (struct create_lease_v2, Name)); 4117 buf->ccontext.NameLength = cpu_to_le16(4); 4118 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4119 buf->Name[0] = 'R'; 4120 buf->Name[1] = 'q'; 4121 buf->Name[2] = 'L'; 4122 buf->Name[3] = 's'; 4123 return (char *)buf; 4124 } 4125 4126 static __u8 4127 smb2_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4128 { 4129 struct create_lease *lc = (struct create_lease *)buf; 4130 4131 *epoch = 0; /* not used */ 4132 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4133 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4134 return le32_to_cpu(lc->lcontext.LeaseState); 4135 } 4136 4137 static __u8 4138 smb3_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4139 { 4140 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4141 4142 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4143 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4144 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4145 if (lease_key) 4146 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4147 return le32_to_cpu(lc->lcontext.LeaseState); 4148 } 4149 4150 static unsigned int 4151 smb2_wp_retry_size(struct inode *inode) 4152 { 4153 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4154 SMB2_MAX_BUFFER_SIZE); 4155 } 4156 4157 static bool 4158 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4159 { 4160 return !cfile->invalidHandle; 4161 } 4162 4163 static void 4164 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4165 struct smb_rqst *old_rq, __le16 cipher_type) 4166 { 4167 struct smb2_hdr *shdr = 4168 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4169 4170 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4171 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4172 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4173 tr_hdr->Flags = cpu_to_le16(0x01); 4174 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4175 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4176 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4177 else 4178 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4179 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4180 } 4181 4182 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4183 int num_rqst, const u8 *sig, u8 **iv, 4184 struct aead_request **req, struct sg_table *sgt, 4185 unsigned int *num_sgs, size_t *sensitive_size) 4186 { 4187 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4188 unsigned int iv_size = crypto_aead_ivsize(tfm); 4189 unsigned int len; 4190 u8 *p; 4191 4192 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4193 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4194 return ERR_PTR(*num_sgs); 4195 4196 len = iv_size; 4197 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4198 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4199 len += req_size; 4200 len = ALIGN(len, __alignof__(struct scatterlist)); 4201 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4202 *sensitive_size = len; 4203 4204 p = kvzalloc(len, GFP_NOFS); 4205 if (!p) 4206 return ERR_PTR(-ENOMEM); 4207 4208 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4209 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4210 crypto_tfm_ctx_alignment()); 4211 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4212 __alignof__(struct scatterlist)); 4213 return p; 4214 } 4215 4216 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4217 int num_rqst, const u8 *sig, u8 **iv, 4218 struct aead_request **req, struct scatterlist **sgl, 4219 size_t *sensitive_size) 4220 { 4221 struct sg_table sgtable = {}; 4222 unsigned int skip, num_sgs, i, j; 4223 ssize_t rc; 4224 void *p; 4225 4226 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4227 &num_sgs, sensitive_size); 4228 if (IS_ERR(p)) 4229 return ERR_CAST(p); 4230 4231 sg_init_marker(sgtable.sgl, num_sgs); 4232 4233 /* 4234 * The first rqst has a transform header where the 4235 * first 20 bytes are not part of the encrypted blob. 4236 */ 4237 skip = 20; 4238 4239 for (i = 0; i < num_rqst; i++) { 4240 struct iov_iter *iter = &rqst[i].rq_iter; 4241 size_t count = iov_iter_count(iter); 4242 4243 for (j = 0; j < rqst[i].rq_nvec; j++) { 4244 cifs_sg_set_buf(&sgtable, 4245 rqst[i].rq_iov[j].iov_base + skip, 4246 rqst[i].rq_iov[j].iov_len - skip); 4247 4248 /* See the above comment on the 'skip' assignment */ 4249 skip = 0; 4250 } 4251 sgtable.orig_nents = sgtable.nents; 4252 4253 rc = extract_iter_to_sg(iter, count, &sgtable, 4254 num_sgs - sgtable.nents, 0); 4255 iov_iter_revert(iter, rc); 4256 sgtable.orig_nents = sgtable.nents; 4257 } 4258 4259 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4260 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4261 *sgl = sgtable.sgl; 4262 return p; 4263 } 4264 4265 static int 4266 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4267 { 4268 struct TCP_Server_Info *pserver; 4269 struct cifs_ses *ses; 4270 u8 *ses_enc_key; 4271 4272 /* If server is a channel, select the primary channel */ 4273 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4274 4275 spin_lock(&cifs_tcp_ses_lock); 4276 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4277 if (ses->Suid == ses_id) { 4278 spin_lock(&ses->ses_lock); 4279 ses_enc_key = enc ? ses->smb3encryptionkey : 4280 ses->smb3decryptionkey; 4281 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4282 spin_unlock(&ses->ses_lock); 4283 spin_unlock(&cifs_tcp_ses_lock); 4284 return 0; 4285 } 4286 } 4287 spin_unlock(&cifs_tcp_ses_lock); 4288 4289 trace_smb3_ses_not_found(ses_id); 4290 4291 return -EAGAIN; 4292 } 4293 /* 4294 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4295 * iov[0] - transform header (associate data), 4296 * iov[1-N] - SMB2 header and pages - data to encrypt. 4297 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4298 * untouched. 4299 */ 4300 static int 4301 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4302 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4303 { 4304 struct smb2_transform_hdr *tr_hdr = 4305 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4306 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4307 int rc = 0; 4308 struct scatterlist *sg; 4309 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4310 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4311 struct aead_request *req; 4312 u8 *iv; 4313 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4314 void *creq; 4315 size_t sensitive_size; 4316 4317 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4318 if (rc) { 4319 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4320 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4321 return rc; 4322 } 4323 4324 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4325 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4326 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4327 else 4328 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4329 4330 if (rc) { 4331 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4332 return rc; 4333 } 4334 4335 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4336 if (rc) { 4337 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4338 return rc; 4339 } 4340 4341 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4342 &sensitive_size); 4343 if (IS_ERR(creq)) 4344 return PTR_ERR(creq); 4345 4346 if (!enc) { 4347 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4348 crypt_len += SMB2_SIGNATURE_SIZE; 4349 } 4350 4351 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4352 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4353 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4354 else { 4355 iv[0] = 3; 4356 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4357 } 4358 4359 aead_request_set_tfm(req, tfm); 4360 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4361 aead_request_set_ad(req, assoc_data_len); 4362 4363 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req); 4364 4365 if (!rc && enc) 4366 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4367 4368 kvfree_sensitive(creq, sensitive_size); 4369 return rc; 4370 } 4371 4372 /* 4373 * Clear a read buffer, discarding the folios which have the 1st mark set. 4374 */ 4375 static void cifs_clear_folioq_buffer(struct folio_queue *buffer) 4376 { 4377 struct folio_queue *folioq; 4378 4379 while ((folioq = buffer)) { 4380 for (int s = 0; s < folioq_count(folioq); s++) 4381 if (folioq_is_marked(folioq, s)) 4382 folio_put(folioq_folio(folioq, s)); 4383 buffer = folioq->next; 4384 kfree(folioq); 4385 } 4386 } 4387 4388 /* 4389 * Allocate buffer space into a folio queue. 4390 */ 4391 static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size) 4392 { 4393 struct folio_queue *buffer = NULL, *tail = NULL, *p; 4394 struct folio *folio; 4395 unsigned int slot; 4396 4397 do { 4398 if (!tail || folioq_full(tail)) { 4399 p = kmalloc(sizeof(*p), GFP_NOFS); 4400 if (!p) 4401 goto nomem; 4402 folioq_init(p, 0); 4403 if (tail) { 4404 tail->next = p; 4405 p->prev = tail; 4406 } else { 4407 buffer = p; 4408 } 4409 tail = p; 4410 } 4411 4412 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0); 4413 if (!folio) 4414 goto nomem; 4415 4416 slot = folioq_append_mark(tail, folio); 4417 size -= folioq_folio_size(tail, slot); 4418 } while (size > 0); 4419 4420 return buffer; 4421 4422 nomem: 4423 cifs_clear_folioq_buffer(buffer); 4424 return NULL; 4425 } 4426 4427 /* 4428 * Copy data from an iterator to the folios in a folio queue buffer. 4429 */ 4430 static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size, 4431 struct folio_queue *buffer) 4432 { 4433 for (; buffer; buffer = buffer->next) { 4434 for (int s = 0; s < folioq_count(buffer); s++) { 4435 struct folio *folio = folioq_folio(buffer, s); 4436 size_t part = folioq_folio_size(buffer, s); 4437 4438 part = umin(part, size); 4439 4440 if (copy_folio_from_iter(folio, 0, part, iter) != part) 4441 return false; 4442 size -= part; 4443 } 4444 } 4445 return true; 4446 } 4447 4448 void 4449 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4450 { 4451 for (int i = 0; i < num_rqst; i++) 4452 cifs_clear_folioq_buffer(rqst[i].rq_buffer); 4453 } 4454 4455 /* 4456 * This function will initialize new_rq and encrypt the content. 4457 * The first entry, new_rq[0], only contains a single iov which contains 4458 * a smb2_transform_hdr and is pre-allocated by the caller. 4459 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4460 * 4461 * The end result is an array of smb_rqst structures where the first structure 4462 * only contains a single iov for the transform header which we then can pass 4463 * to crypt_message(). 4464 * 4465 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4466 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4467 */ 4468 static int 4469 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4470 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4471 { 4472 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4473 unsigned int orig_len = 0; 4474 int rc = -ENOMEM; 4475 4476 for (int i = 1; i < num_rqst; i++) { 4477 struct smb_rqst *old = &old_rq[i - 1]; 4478 struct smb_rqst *new = &new_rq[i]; 4479 struct folio_queue *buffer; 4480 size_t size = iov_iter_count(&old->rq_iter); 4481 4482 orig_len += smb_rqst_len(server, old); 4483 new->rq_iov = old->rq_iov; 4484 new->rq_nvec = old->rq_nvec; 4485 4486 if (size > 0) { 4487 buffer = cifs_alloc_folioq_buffer(size); 4488 if (!buffer) 4489 goto err_free; 4490 4491 new->rq_buffer = buffer; 4492 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE, 4493 buffer, 0, 0, size); 4494 4495 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) { 4496 rc = -EIO; 4497 goto err_free; 4498 } 4499 } 4500 } 4501 4502 /* fill the 1st iov with a transform header */ 4503 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4504 4505 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4506 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4507 if (rc) 4508 goto err_free; 4509 4510 return rc; 4511 4512 err_free: 4513 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4514 return rc; 4515 } 4516 4517 static int 4518 smb3_is_transform_hdr(void *buf) 4519 { 4520 struct smb2_transform_hdr *trhdr = buf; 4521 4522 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4523 } 4524 4525 static int 4526 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4527 unsigned int buf_data_size, struct iov_iter *iter, 4528 bool is_offloaded) 4529 { 4530 struct crypto_aead *tfm; 4531 struct smb_rqst rqst = {NULL}; 4532 struct kvec iov[2]; 4533 size_t iter_size = 0; 4534 int rc; 4535 4536 iov[0].iov_base = buf; 4537 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4538 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4539 iov[1].iov_len = buf_data_size; 4540 4541 rqst.rq_iov = iov; 4542 rqst.rq_nvec = 2; 4543 if (iter) { 4544 rqst.rq_iter = *iter; 4545 iter_size = iov_iter_count(iter); 4546 } 4547 4548 if (is_offloaded) { 4549 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4550 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4551 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4552 else 4553 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4554 if (IS_ERR(tfm)) { 4555 rc = PTR_ERR(tfm); 4556 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4557 4558 return rc; 4559 } 4560 } else { 4561 rc = smb3_crypto_aead_allocate(server); 4562 if (unlikely(rc)) 4563 return rc; 4564 tfm = server->secmech.dec; 4565 } 4566 4567 rc = crypt_message(server, 1, &rqst, 0, tfm); 4568 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4569 4570 if (is_offloaded) 4571 crypto_free_aead(tfm); 4572 4573 if (rc) 4574 return rc; 4575 4576 memmove(buf, iov[1].iov_base, buf_data_size); 4577 4578 if (!is_offloaded) 4579 server->total_read = buf_data_size + iter_size; 4580 4581 return rc; 4582 } 4583 4584 static int 4585 cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size, 4586 size_t skip, struct iov_iter *iter) 4587 { 4588 for (; folioq; folioq = folioq->next) { 4589 for (int s = 0; s < folioq_count(folioq); s++) { 4590 struct folio *folio = folioq_folio(folioq, s); 4591 size_t fsize = folio_size(folio); 4592 size_t n, len = umin(fsize - skip, data_size); 4593 4594 n = copy_folio_to_iter(folio, skip, len, iter); 4595 if (n != len) { 4596 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4597 return -EIO; 4598 } 4599 data_size -= n; 4600 skip = 0; 4601 } 4602 } 4603 4604 return 0; 4605 } 4606 4607 static int 4608 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4609 char *buf, unsigned int buf_len, struct folio_queue *buffer, 4610 unsigned int buffer_len, bool is_offloaded) 4611 { 4612 unsigned int data_offset; 4613 unsigned int data_len; 4614 unsigned int cur_off; 4615 unsigned int cur_page_idx; 4616 unsigned int pad_len; 4617 struct cifs_io_subrequest *rdata = mid->callback_data; 4618 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4619 int length; 4620 bool use_rdma_mr = false; 4621 4622 if (shdr->Command != SMB2_READ) { 4623 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4624 return -EOPNOTSUPP; 4625 } 4626 4627 if (server->ops->is_session_expired && 4628 server->ops->is_session_expired(buf)) { 4629 if (!is_offloaded) 4630 cifs_reconnect(server, true); 4631 return -1; 4632 } 4633 4634 if (server->ops->is_status_pending && 4635 server->ops->is_status_pending(buf, server)) 4636 return -1; 4637 4638 /* set up first two iov to get credits */ 4639 rdata->iov[0].iov_base = buf; 4640 rdata->iov[0].iov_len = 0; 4641 rdata->iov[1].iov_base = buf; 4642 rdata->iov[1].iov_len = 4643 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4644 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4645 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4646 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4647 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4648 4649 rdata->result = server->ops->map_error(buf, true); 4650 if (rdata->result != 0) { 4651 cifs_dbg(FYI, "%s: server returned error %d\n", 4652 __func__, rdata->result); 4653 /* normal error on read response */ 4654 if (is_offloaded) 4655 mid->mid_state = MID_RESPONSE_RECEIVED; 4656 else 4657 dequeue_mid(mid, false); 4658 return 0; 4659 } 4660 4661 data_offset = server->ops->read_data_offset(buf); 4662 #ifdef CONFIG_CIFS_SMB_DIRECT 4663 use_rdma_mr = rdata->mr; 4664 #endif 4665 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4666 4667 if (data_offset < server->vals->read_rsp_size) { 4668 /* 4669 * win2k8 sometimes sends an offset of 0 when the read 4670 * is beyond the EOF. Treat it as if the data starts just after 4671 * the header. 4672 */ 4673 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4674 __func__, data_offset); 4675 data_offset = server->vals->read_rsp_size; 4676 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4677 /* data_offset is beyond the end of smallbuf */ 4678 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4679 __func__, data_offset); 4680 rdata->result = -EIO; 4681 if (is_offloaded) 4682 mid->mid_state = MID_RESPONSE_MALFORMED; 4683 else 4684 dequeue_mid(mid, rdata->result); 4685 return 0; 4686 } 4687 4688 pad_len = data_offset - server->vals->read_rsp_size; 4689 4690 if (buf_len <= data_offset) { 4691 /* read response payload is in pages */ 4692 cur_page_idx = pad_len / PAGE_SIZE; 4693 cur_off = pad_len % PAGE_SIZE; 4694 4695 if (cur_page_idx != 0) { 4696 /* data offset is beyond the 1st page of response */ 4697 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4698 __func__, data_offset); 4699 rdata->result = -EIO; 4700 if (is_offloaded) 4701 mid->mid_state = MID_RESPONSE_MALFORMED; 4702 else 4703 dequeue_mid(mid, rdata->result); 4704 return 0; 4705 } 4706 4707 if (data_len > buffer_len - pad_len) { 4708 /* data_len is corrupt -- discard frame */ 4709 rdata->result = -EIO; 4710 if (is_offloaded) 4711 mid->mid_state = MID_RESPONSE_MALFORMED; 4712 else 4713 dequeue_mid(mid, rdata->result); 4714 return 0; 4715 } 4716 4717 /* Copy the data to the output I/O iterator. */ 4718 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len, 4719 cur_off, &rdata->subreq.io_iter); 4720 if (rdata->result != 0) { 4721 if (is_offloaded) 4722 mid->mid_state = MID_RESPONSE_MALFORMED; 4723 else 4724 dequeue_mid(mid, rdata->result); 4725 return 0; 4726 } 4727 rdata->got_bytes = buffer_len; 4728 4729 } else if (buf_len >= data_offset + data_len) { 4730 /* read response payload is in buf */ 4731 WARN_ONCE(buffer, "read data can be either in buf or in buffer"); 4732 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4733 if (length < 0) 4734 return length; 4735 rdata->got_bytes = data_len; 4736 } else { 4737 /* read response payload cannot be in both buf and pages */ 4738 WARN_ONCE(1, "buf can not contain only a part of read data"); 4739 rdata->result = -EIO; 4740 if (is_offloaded) 4741 mid->mid_state = MID_RESPONSE_MALFORMED; 4742 else 4743 dequeue_mid(mid, rdata->result); 4744 return 0; 4745 } 4746 4747 if (is_offloaded) 4748 mid->mid_state = MID_RESPONSE_RECEIVED; 4749 else 4750 dequeue_mid(mid, false); 4751 return 0; 4752 } 4753 4754 struct smb2_decrypt_work { 4755 struct work_struct decrypt; 4756 struct TCP_Server_Info *server; 4757 struct folio_queue *buffer; 4758 char *buf; 4759 unsigned int len; 4760 }; 4761 4762 4763 static void smb2_decrypt_offload(struct work_struct *work) 4764 { 4765 struct smb2_decrypt_work *dw = container_of(work, 4766 struct smb2_decrypt_work, decrypt); 4767 int rc; 4768 struct mid_q_entry *mid; 4769 struct iov_iter iter; 4770 4771 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len); 4772 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4773 &iter, true); 4774 if (rc) { 4775 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4776 goto free_pages; 4777 } 4778 4779 dw->server->lstrp = jiffies; 4780 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4781 if (mid == NULL) 4782 cifs_dbg(FYI, "mid not found\n"); 4783 else { 4784 mid->decrypted = true; 4785 rc = handle_read_data(dw->server, mid, dw->buf, 4786 dw->server->vals->read_rsp_size, 4787 dw->buffer, dw->len, 4788 true); 4789 if (rc >= 0) { 4790 #ifdef CONFIG_CIFS_STATS2 4791 mid->when_received = jiffies; 4792 #endif 4793 if (dw->server->ops->is_network_name_deleted) 4794 dw->server->ops->is_network_name_deleted(dw->buf, 4795 dw->server); 4796 4797 mid->callback(mid); 4798 } else { 4799 spin_lock(&dw->server->srv_lock); 4800 if (dw->server->tcpStatus == CifsNeedReconnect) { 4801 spin_lock(&dw->server->mid_lock); 4802 mid->mid_state = MID_RETRY_NEEDED; 4803 spin_unlock(&dw->server->mid_lock); 4804 spin_unlock(&dw->server->srv_lock); 4805 mid->callback(mid); 4806 } else { 4807 spin_lock(&dw->server->mid_lock); 4808 mid->mid_state = MID_REQUEST_SUBMITTED; 4809 mid->mid_flags &= ~(MID_DELETED); 4810 list_add_tail(&mid->qhead, 4811 &dw->server->pending_mid_q); 4812 spin_unlock(&dw->server->mid_lock); 4813 spin_unlock(&dw->server->srv_lock); 4814 } 4815 } 4816 release_mid(mid); 4817 } 4818 4819 free_pages: 4820 cifs_clear_folioq_buffer(dw->buffer); 4821 cifs_small_buf_release(dw->buf); 4822 kfree(dw); 4823 } 4824 4825 4826 static int 4827 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4828 int *num_mids) 4829 { 4830 char *buf = server->smallbuf; 4831 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4832 struct iov_iter iter; 4833 unsigned int len; 4834 unsigned int buflen = server->pdu_size; 4835 int rc; 4836 struct smb2_decrypt_work *dw; 4837 4838 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4839 if (!dw) 4840 return -ENOMEM; 4841 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4842 dw->server = server; 4843 4844 *num_mids = 1; 4845 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4846 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4847 4848 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4849 if (rc < 0) 4850 goto free_dw; 4851 server->total_read += rc; 4852 4853 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4854 server->vals->read_rsp_size; 4855 dw->len = len; 4856 len = round_up(dw->len, PAGE_SIZE); 4857 4858 rc = -ENOMEM; 4859 dw->buffer = cifs_alloc_folioq_buffer(len); 4860 if (!dw->buffer) 4861 goto discard_data; 4862 4863 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len); 4864 4865 /* Read the data into the buffer and clear excess bufferage. */ 4866 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4867 if (rc < 0) 4868 goto discard_data; 4869 4870 server->total_read += rc; 4871 if (rc < len) { 4872 struct iov_iter tmp = iter; 4873 4874 iov_iter_advance(&tmp, rc); 4875 iov_iter_zero(len - rc, &tmp); 4876 } 4877 iov_iter_truncate(&iter, dw->len); 4878 4879 rc = cifs_discard_remaining_data(server); 4880 if (rc) 4881 goto free_pages; 4882 4883 /* 4884 * For large reads, offload to different thread for better performance, 4885 * use more cores decrypting which can be expensive 4886 */ 4887 4888 if ((server->min_offload) && (server->in_flight > 1) && 4889 (server->pdu_size >= server->min_offload)) { 4890 dw->buf = server->smallbuf; 4891 server->smallbuf = (char *)cifs_small_buf_get(); 4892 4893 queue_work(decrypt_wq, &dw->decrypt); 4894 *num_mids = 0; /* worker thread takes care of finding mid */ 4895 return -1; 4896 } 4897 4898 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4899 &iter, false); 4900 if (rc) 4901 goto free_pages; 4902 4903 *mid = smb2_find_mid(server, buf); 4904 if (*mid == NULL) { 4905 cifs_dbg(FYI, "mid not found\n"); 4906 } else { 4907 cifs_dbg(FYI, "mid found\n"); 4908 (*mid)->decrypted = true; 4909 rc = handle_read_data(server, *mid, buf, 4910 server->vals->read_rsp_size, 4911 dw->buffer, dw->len, false); 4912 if (rc >= 0) { 4913 if (server->ops->is_network_name_deleted) { 4914 server->ops->is_network_name_deleted(buf, 4915 server); 4916 } 4917 } 4918 } 4919 4920 free_pages: 4921 cifs_clear_folioq_buffer(dw->buffer); 4922 free_dw: 4923 kfree(dw); 4924 return rc; 4925 discard_data: 4926 cifs_discard_remaining_data(server); 4927 goto free_pages; 4928 } 4929 4930 static int 4931 receive_encrypted_standard(struct TCP_Server_Info *server, 4932 struct mid_q_entry **mids, char **bufs, 4933 int *num_mids) 4934 { 4935 int ret, length; 4936 char *buf = server->smallbuf; 4937 struct smb2_hdr *shdr; 4938 unsigned int pdu_length = server->pdu_size; 4939 unsigned int buf_size; 4940 unsigned int next_cmd; 4941 struct mid_q_entry *mid_entry; 4942 int next_is_large; 4943 char *next_buffer = NULL; 4944 4945 *num_mids = 0; 4946 4947 /* switch to large buffer if too big for a small one */ 4948 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4949 server->large_buf = true; 4950 memcpy(server->bigbuf, buf, server->total_read); 4951 buf = server->bigbuf; 4952 } 4953 4954 /* now read the rest */ 4955 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4956 pdu_length - HEADER_SIZE(server) + 1); 4957 if (length < 0) 4958 return length; 4959 server->total_read += length; 4960 4961 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4962 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4963 if (length) 4964 return length; 4965 4966 next_is_large = server->large_buf; 4967 one_more: 4968 shdr = (struct smb2_hdr *)buf; 4969 next_cmd = le32_to_cpu(shdr->NextCommand); 4970 if (next_cmd) { 4971 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4972 return -1; 4973 if (next_is_large) 4974 next_buffer = (char *)cifs_buf_get(); 4975 else 4976 next_buffer = (char *)cifs_small_buf_get(); 4977 if (!next_buffer) { 4978 cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); 4979 return -1; 4980 } 4981 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4982 } 4983 4984 mid_entry = smb2_find_mid(server, buf); 4985 if (mid_entry == NULL) 4986 cifs_dbg(FYI, "mid not found\n"); 4987 else { 4988 cifs_dbg(FYI, "mid found\n"); 4989 mid_entry->decrypted = true; 4990 mid_entry->resp_buf_size = server->pdu_size; 4991 } 4992 4993 if (*num_mids >= MAX_COMPOUND) { 4994 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4995 return -1; 4996 } 4997 bufs[*num_mids] = buf; 4998 mids[(*num_mids)++] = mid_entry; 4999 5000 if (mid_entry && mid_entry->handle) 5001 ret = mid_entry->handle(server, mid_entry); 5002 else 5003 ret = cifs_handle_standard(server, mid_entry); 5004 5005 if (ret == 0 && next_cmd) { 5006 pdu_length -= next_cmd; 5007 server->large_buf = next_is_large; 5008 if (next_is_large) 5009 server->bigbuf = buf = next_buffer; 5010 else 5011 server->smallbuf = buf = next_buffer; 5012 goto one_more; 5013 } else if (ret != 0) { 5014 /* 5015 * ret != 0 here means that we didn't get to handle_mid() thus 5016 * server->smallbuf and server->bigbuf are still valid. We need 5017 * to free next_buffer because it is not going to be used 5018 * anywhere. 5019 */ 5020 if (next_is_large) 5021 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5022 else 5023 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5024 } 5025 5026 return ret; 5027 } 5028 5029 static int 5030 smb3_receive_transform(struct TCP_Server_Info *server, 5031 struct mid_q_entry **mids, char **bufs, int *num_mids) 5032 { 5033 char *buf = server->smallbuf; 5034 unsigned int pdu_length = server->pdu_size; 5035 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5036 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5037 5038 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5039 sizeof(struct smb2_hdr)) { 5040 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5041 pdu_length); 5042 cifs_reconnect(server, true); 5043 return -ECONNABORTED; 5044 } 5045 5046 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5047 cifs_server_dbg(VFS, "Transform message is broken\n"); 5048 cifs_reconnect(server, true); 5049 return -ECONNABORTED; 5050 } 5051 5052 /* TODO: add support for compounds containing READ. */ 5053 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5054 return receive_encrypted_read(server, &mids[0], num_mids); 5055 } 5056 5057 return receive_encrypted_standard(server, mids, bufs, num_mids); 5058 } 5059 5060 int 5061 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5062 { 5063 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5064 5065 return handle_read_data(server, mid, buf, server->pdu_size, 5066 NULL, 0, false); 5067 } 5068 5069 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5070 unsigned int *noff) 5071 { 5072 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5073 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5074 5075 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5076 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5077 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5078 return -EINVAL; 5079 } else { 5080 *noff = le32_to_cpu(hdr->NextCommand); 5081 } 5082 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5083 return -EINVAL; 5084 return 0; 5085 } 5086 5087 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5088 struct dentry *dentry, struct cifs_tcon *tcon, 5089 const char *full_path, umode_t mode, dev_t dev, 5090 const char *symname) 5091 { 5092 struct TCP_Server_Info *server = tcon->ses->server; 5093 struct cifs_open_parms oparms; 5094 struct cifs_open_info_data idata; 5095 struct cifs_io_parms io_parms = {}; 5096 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5097 struct cifs_fid fid; 5098 unsigned int bytes_written; 5099 u8 type[8]; 5100 int type_len = 0; 5101 struct { 5102 __le64 major; 5103 __le64 minor; 5104 } __packed pdev = {}; 5105 __le16 *symname_utf16 = NULL; 5106 u8 *data = NULL; 5107 int data_len = 0; 5108 struct kvec iov[3]; 5109 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5110 int rc; 5111 5112 switch (mode & S_IFMT) { 5113 case S_IFCHR: 5114 type_len = 8; 5115 memcpy(type, "IntxCHR\0", type_len); 5116 pdev.major = cpu_to_le64(MAJOR(dev)); 5117 pdev.minor = cpu_to_le64(MINOR(dev)); 5118 data = (u8 *)&pdev; 5119 data_len = sizeof(pdev); 5120 break; 5121 case S_IFBLK: 5122 type_len = 8; 5123 memcpy(type, "IntxBLK\0", type_len); 5124 pdev.major = cpu_to_le64(MAJOR(dev)); 5125 pdev.minor = cpu_to_le64(MINOR(dev)); 5126 data = (u8 *)&pdev; 5127 data_len = sizeof(pdev); 5128 break; 5129 case S_IFLNK: 5130 type_len = 8; 5131 memcpy(type, "IntxLNK\1", type_len); 5132 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname), 5133 &data_len, cifs_sb->local_nls, 5134 NO_MAP_UNI_RSVD); 5135 if (!symname_utf16) { 5136 rc = -ENOMEM; 5137 goto out; 5138 } 5139 data_len -= 2; /* symlink is without trailing wide-nul */ 5140 data = (u8 *)symname_utf16; 5141 break; 5142 case S_IFSOCK: 5143 type_len = 8; 5144 strscpy(type, "LnxSOCK"); 5145 data = (u8 *)&pdev; 5146 data_len = sizeof(pdev); 5147 break; 5148 case S_IFIFO: 5149 type_len = 8; 5150 strscpy(type, "LnxFIFO"); 5151 data = (u8 *)&pdev; 5152 data_len = sizeof(pdev); 5153 break; 5154 default: 5155 rc = -EPERM; 5156 goto out; 5157 } 5158 5159 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5160 FILE_CREATE, CREATE_NOT_DIR | 5161 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5162 oparms.fid = &fid; 5163 idata.contains_posix_file_info = false; 5164 rc = server->ops->open(xid, &oparms, &oplock, &idata); 5165 if (rc) 5166 goto out; 5167 5168 /* 5169 * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL 5170 * option. If not then server does not support ATTR_SYSTEM and newly 5171 * created file is not SFU compatible, which means that the call failed. 5172 */ 5173 if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) { 5174 rc = -EOPNOTSUPP; 5175 goto out_close; 5176 } 5177 5178 if (type_len + data_len > 0) { 5179 io_parms.pid = current->tgid; 5180 io_parms.tcon = tcon; 5181 io_parms.length = type_len + data_len; 5182 iov[1].iov_base = type; 5183 iov[1].iov_len = type_len; 5184 iov[2].iov_base = data; 5185 iov[2].iov_len = data_len; 5186 5187 rc = server->ops->sync_write(xid, &fid, &io_parms, 5188 &bytes_written, 5189 iov, ARRAY_SIZE(iov)-1); 5190 } 5191 5192 out_close: 5193 server->ops->close(xid, tcon, &fid); 5194 5195 /* 5196 * If CREATE was successful but either setting ATTR_SYSTEM failed or 5197 * writing type/data information failed then remove the intermediate 5198 * object created by CREATE. Otherwise intermediate empty object stay 5199 * on the server. 5200 */ 5201 if (rc) 5202 server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL); 5203 5204 out: 5205 kfree(symname_utf16); 5206 return rc; 5207 } 5208 5209 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5210 struct dentry *dentry, struct cifs_tcon *tcon, 5211 const char *full_path, umode_t mode, dev_t dev) 5212 { 5213 struct inode *new = NULL; 5214 int rc; 5215 5216 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5217 full_path, mode, dev, NULL); 5218 if (rc) 5219 return rc; 5220 5221 if (tcon->posix_extensions) { 5222 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5223 inode->i_sb, xid); 5224 } else if (tcon->unix_ext) { 5225 rc = cifs_get_inode_info_unix(&new, full_path, 5226 inode->i_sb, xid); 5227 } else { 5228 rc = cifs_get_inode_info(&new, full_path, NULL, 5229 inode->i_sb, xid, NULL); 5230 } 5231 if (!rc) 5232 d_instantiate(dentry, new); 5233 return rc; 5234 } 5235 5236 static int smb2_make_node(unsigned int xid, struct inode *inode, 5237 struct dentry *dentry, struct cifs_tcon *tcon, 5238 const char *full_path, umode_t mode, dev_t dev) 5239 { 5240 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5241 int rc = -EOPNOTSUPP; 5242 5243 /* 5244 * Check if mounted with mount parm 'sfu' mount parm. 5245 * SFU emulation should work with all servers, but only 5246 * supports block and char device, socket & fifo, 5247 * and was used by default in earlier versions of Windows 5248 */ 5249 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5250 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5251 full_path, mode, dev); 5252 } else if (le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS) { 5253 rc = smb2_mknod_reparse(xid, inode, dentry, tcon, 5254 full_path, mode, dev); 5255 } 5256 return rc; 5257 } 5258 5259 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5260 struct smb_version_operations smb20_operations = { 5261 .compare_fids = smb2_compare_fids, 5262 .setup_request = smb2_setup_request, 5263 .setup_async_request = smb2_setup_async_request, 5264 .check_receive = smb2_check_receive, 5265 .add_credits = smb2_add_credits, 5266 .set_credits = smb2_set_credits, 5267 .get_credits_field = smb2_get_credits_field, 5268 .get_credits = smb2_get_credits, 5269 .wait_mtu_credits = cifs_wait_mtu_credits, 5270 .get_next_mid = smb2_get_next_mid, 5271 .revert_current_mid = smb2_revert_current_mid, 5272 .read_data_offset = smb2_read_data_offset, 5273 .read_data_length = smb2_read_data_length, 5274 .map_error = map_smb2_to_linux_error, 5275 .find_mid = smb2_find_mid, 5276 .check_message = smb2_check_message, 5277 .dump_detail = smb2_dump_detail, 5278 .clear_stats = smb2_clear_stats, 5279 .print_stats = smb2_print_stats, 5280 .is_oplock_break = smb2_is_valid_oplock_break, 5281 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5282 .downgrade_oplock = smb2_downgrade_oplock, 5283 .need_neg = smb2_need_neg, 5284 .negotiate = smb2_negotiate, 5285 .negotiate_wsize = smb2_negotiate_wsize, 5286 .negotiate_rsize = smb2_negotiate_rsize, 5287 .sess_setup = SMB2_sess_setup, 5288 .logoff = SMB2_logoff, 5289 .tree_connect = SMB2_tcon, 5290 .tree_disconnect = SMB2_tdis, 5291 .qfs_tcon = smb2_qfs_tcon, 5292 .is_path_accessible = smb2_is_path_accessible, 5293 .can_echo = smb2_can_echo, 5294 .echo = SMB2_echo, 5295 .query_path_info = smb2_query_path_info, 5296 .query_reparse_point = smb2_query_reparse_point, 5297 .get_srv_inum = smb2_get_srv_inum, 5298 .query_file_info = smb2_query_file_info, 5299 .set_path_size = smb2_set_path_size, 5300 .set_file_size = smb2_set_file_size, 5301 .set_file_info = smb2_set_file_info, 5302 .set_compression = smb2_set_compression, 5303 .mkdir = smb2_mkdir, 5304 .mkdir_setinfo = smb2_mkdir_setinfo, 5305 .rmdir = smb2_rmdir, 5306 .unlink = smb2_unlink, 5307 .rename = smb2_rename_path, 5308 .create_hardlink = smb2_create_hardlink, 5309 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5310 .query_mf_symlink = smb3_query_mf_symlink, 5311 .create_mf_symlink = smb3_create_mf_symlink, 5312 .create_reparse_symlink = smb2_create_reparse_symlink, 5313 .open = smb2_open_file, 5314 .set_fid = smb2_set_fid, 5315 .close = smb2_close_file, 5316 .flush = smb2_flush_file, 5317 .async_readv = smb2_async_readv, 5318 .async_writev = smb2_async_writev, 5319 .sync_read = smb2_sync_read, 5320 .sync_write = smb2_sync_write, 5321 .query_dir_first = smb2_query_dir_first, 5322 .query_dir_next = smb2_query_dir_next, 5323 .close_dir = smb2_close_dir, 5324 .calc_smb_size = smb2_calc_size, 5325 .is_status_pending = smb2_is_status_pending, 5326 .is_session_expired = smb2_is_session_expired, 5327 .oplock_response = smb2_oplock_response, 5328 .queryfs = smb2_queryfs, 5329 .mand_lock = smb2_mand_lock, 5330 .mand_unlock_range = smb2_unlock_range, 5331 .push_mand_locks = smb2_push_mandatory_locks, 5332 .get_lease_key = smb2_get_lease_key, 5333 .set_lease_key = smb2_set_lease_key, 5334 .new_lease_key = smb2_new_lease_key, 5335 .calc_signature = smb2_calc_signature, 5336 .is_read_op = smb2_is_read_op, 5337 .set_oplock_level = smb2_set_oplock_level, 5338 .create_lease_buf = smb2_create_lease_buf, 5339 .parse_lease_buf = smb2_parse_lease_buf, 5340 .copychunk_range = smb2_copychunk_range, 5341 .wp_retry_size = smb2_wp_retry_size, 5342 .dir_needs_close = smb2_dir_needs_close, 5343 .get_dfs_refer = smb2_get_dfs_refer, 5344 .select_sectype = smb2_select_sectype, 5345 #ifdef CONFIG_CIFS_XATTR 5346 .query_all_EAs = smb2_query_eas, 5347 .set_EA = smb2_set_ea, 5348 #endif /* CIFS_XATTR */ 5349 .get_acl = get_smb2_acl, 5350 .get_acl_by_fid = get_smb2_acl_by_fid, 5351 .set_acl = set_smb2_acl, 5352 .next_header = smb2_next_header, 5353 .ioctl_query_info = smb2_ioctl_query_info, 5354 .make_node = smb2_make_node, 5355 .fiemap = smb3_fiemap, 5356 .llseek = smb3_llseek, 5357 .is_status_io_timeout = smb2_is_status_io_timeout, 5358 .is_network_name_deleted = smb2_is_network_name_deleted, 5359 }; 5360 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5361 5362 struct smb_version_operations smb21_operations = { 5363 .compare_fids = smb2_compare_fids, 5364 .setup_request = smb2_setup_request, 5365 .setup_async_request = smb2_setup_async_request, 5366 .check_receive = smb2_check_receive, 5367 .add_credits = smb2_add_credits, 5368 .set_credits = smb2_set_credits, 5369 .get_credits_field = smb2_get_credits_field, 5370 .get_credits = smb2_get_credits, 5371 .wait_mtu_credits = smb2_wait_mtu_credits, 5372 .adjust_credits = smb2_adjust_credits, 5373 .get_next_mid = smb2_get_next_mid, 5374 .revert_current_mid = smb2_revert_current_mid, 5375 .read_data_offset = smb2_read_data_offset, 5376 .read_data_length = smb2_read_data_length, 5377 .map_error = map_smb2_to_linux_error, 5378 .find_mid = smb2_find_mid, 5379 .check_message = smb2_check_message, 5380 .dump_detail = smb2_dump_detail, 5381 .clear_stats = smb2_clear_stats, 5382 .print_stats = smb2_print_stats, 5383 .is_oplock_break = smb2_is_valid_oplock_break, 5384 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5385 .downgrade_oplock = smb2_downgrade_oplock, 5386 .need_neg = smb2_need_neg, 5387 .negotiate = smb2_negotiate, 5388 .negotiate_wsize = smb2_negotiate_wsize, 5389 .negotiate_rsize = smb2_negotiate_rsize, 5390 .sess_setup = SMB2_sess_setup, 5391 .logoff = SMB2_logoff, 5392 .tree_connect = SMB2_tcon, 5393 .tree_disconnect = SMB2_tdis, 5394 .qfs_tcon = smb2_qfs_tcon, 5395 .is_path_accessible = smb2_is_path_accessible, 5396 .can_echo = smb2_can_echo, 5397 .echo = SMB2_echo, 5398 .query_path_info = smb2_query_path_info, 5399 .query_reparse_point = smb2_query_reparse_point, 5400 .get_srv_inum = smb2_get_srv_inum, 5401 .query_file_info = smb2_query_file_info, 5402 .set_path_size = smb2_set_path_size, 5403 .set_file_size = smb2_set_file_size, 5404 .set_file_info = smb2_set_file_info, 5405 .set_compression = smb2_set_compression, 5406 .mkdir = smb2_mkdir, 5407 .mkdir_setinfo = smb2_mkdir_setinfo, 5408 .rmdir = smb2_rmdir, 5409 .unlink = smb2_unlink, 5410 .rename = smb2_rename_path, 5411 .create_hardlink = smb2_create_hardlink, 5412 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5413 .query_mf_symlink = smb3_query_mf_symlink, 5414 .create_mf_symlink = smb3_create_mf_symlink, 5415 .create_reparse_symlink = smb2_create_reparse_symlink, 5416 .open = smb2_open_file, 5417 .set_fid = smb2_set_fid, 5418 .close = smb2_close_file, 5419 .flush = smb2_flush_file, 5420 .async_readv = smb2_async_readv, 5421 .async_writev = smb2_async_writev, 5422 .sync_read = smb2_sync_read, 5423 .sync_write = smb2_sync_write, 5424 .query_dir_first = smb2_query_dir_first, 5425 .query_dir_next = smb2_query_dir_next, 5426 .close_dir = smb2_close_dir, 5427 .calc_smb_size = smb2_calc_size, 5428 .is_status_pending = smb2_is_status_pending, 5429 .is_session_expired = smb2_is_session_expired, 5430 .oplock_response = smb2_oplock_response, 5431 .queryfs = smb2_queryfs, 5432 .mand_lock = smb2_mand_lock, 5433 .mand_unlock_range = smb2_unlock_range, 5434 .push_mand_locks = smb2_push_mandatory_locks, 5435 .get_lease_key = smb2_get_lease_key, 5436 .set_lease_key = smb2_set_lease_key, 5437 .new_lease_key = smb2_new_lease_key, 5438 .calc_signature = smb2_calc_signature, 5439 .is_read_op = smb21_is_read_op, 5440 .set_oplock_level = smb21_set_oplock_level, 5441 .create_lease_buf = smb2_create_lease_buf, 5442 .parse_lease_buf = smb2_parse_lease_buf, 5443 .copychunk_range = smb2_copychunk_range, 5444 .wp_retry_size = smb2_wp_retry_size, 5445 .dir_needs_close = smb2_dir_needs_close, 5446 .enum_snapshots = smb3_enum_snapshots, 5447 .notify = smb3_notify, 5448 .get_dfs_refer = smb2_get_dfs_refer, 5449 .select_sectype = smb2_select_sectype, 5450 #ifdef CONFIG_CIFS_XATTR 5451 .query_all_EAs = smb2_query_eas, 5452 .set_EA = smb2_set_ea, 5453 #endif /* CIFS_XATTR */ 5454 .get_acl = get_smb2_acl, 5455 .get_acl_by_fid = get_smb2_acl_by_fid, 5456 .set_acl = set_smb2_acl, 5457 .next_header = smb2_next_header, 5458 .ioctl_query_info = smb2_ioctl_query_info, 5459 .make_node = smb2_make_node, 5460 .fiemap = smb3_fiemap, 5461 .llseek = smb3_llseek, 5462 .is_status_io_timeout = smb2_is_status_io_timeout, 5463 .is_network_name_deleted = smb2_is_network_name_deleted, 5464 }; 5465 5466 struct smb_version_operations smb30_operations = { 5467 .compare_fids = smb2_compare_fids, 5468 .setup_request = smb2_setup_request, 5469 .setup_async_request = smb2_setup_async_request, 5470 .check_receive = smb2_check_receive, 5471 .add_credits = smb2_add_credits, 5472 .set_credits = smb2_set_credits, 5473 .get_credits_field = smb2_get_credits_field, 5474 .get_credits = smb2_get_credits, 5475 .wait_mtu_credits = smb2_wait_mtu_credits, 5476 .adjust_credits = smb2_adjust_credits, 5477 .get_next_mid = smb2_get_next_mid, 5478 .revert_current_mid = smb2_revert_current_mid, 5479 .read_data_offset = smb2_read_data_offset, 5480 .read_data_length = smb2_read_data_length, 5481 .map_error = map_smb2_to_linux_error, 5482 .find_mid = smb2_find_mid, 5483 .check_message = smb2_check_message, 5484 .dump_detail = smb2_dump_detail, 5485 .clear_stats = smb2_clear_stats, 5486 .print_stats = smb2_print_stats, 5487 .dump_share_caps = smb2_dump_share_caps, 5488 .is_oplock_break = smb2_is_valid_oplock_break, 5489 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5490 .downgrade_oplock = smb3_downgrade_oplock, 5491 .need_neg = smb2_need_neg, 5492 .negotiate = smb2_negotiate, 5493 .negotiate_wsize = smb3_negotiate_wsize, 5494 .negotiate_rsize = smb3_negotiate_rsize, 5495 .sess_setup = SMB2_sess_setup, 5496 .logoff = SMB2_logoff, 5497 .tree_connect = SMB2_tcon, 5498 .tree_disconnect = SMB2_tdis, 5499 .qfs_tcon = smb3_qfs_tcon, 5500 .query_server_interfaces = SMB3_request_interfaces, 5501 .is_path_accessible = smb2_is_path_accessible, 5502 .can_echo = smb2_can_echo, 5503 .echo = SMB2_echo, 5504 .query_path_info = smb2_query_path_info, 5505 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5506 .query_reparse_point = smb2_query_reparse_point, 5507 .get_srv_inum = smb2_get_srv_inum, 5508 .query_file_info = smb2_query_file_info, 5509 .set_path_size = smb2_set_path_size, 5510 .set_file_size = smb2_set_file_size, 5511 .set_file_info = smb2_set_file_info, 5512 .set_compression = smb2_set_compression, 5513 .mkdir = smb2_mkdir, 5514 .mkdir_setinfo = smb2_mkdir_setinfo, 5515 .rmdir = smb2_rmdir, 5516 .unlink = smb2_unlink, 5517 .rename = smb2_rename_path, 5518 .create_hardlink = smb2_create_hardlink, 5519 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5520 .query_mf_symlink = smb3_query_mf_symlink, 5521 .create_mf_symlink = smb3_create_mf_symlink, 5522 .create_reparse_symlink = smb2_create_reparse_symlink, 5523 .open = smb2_open_file, 5524 .set_fid = smb2_set_fid, 5525 .close = smb2_close_file, 5526 .close_getattr = smb2_close_getattr, 5527 .flush = smb2_flush_file, 5528 .async_readv = smb2_async_readv, 5529 .async_writev = smb2_async_writev, 5530 .sync_read = smb2_sync_read, 5531 .sync_write = smb2_sync_write, 5532 .query_dir_first = smb2_query_dir_first, 5533 .query_dir_next = smb2_query_dir_next, 5534 .close_dir = smb2_close_dir, 5535 .calc_smb_size = smb2_calc_size, 5536 .is_status_pending = smb2_is_status_pending, 5537 .is_session_expired = smb2_is_session_expired, 5538 .oplock_response = smb2_oplock_response, 5539 .queryfs = smb2_queryfs, 5540 .mand_lock = smb2_mand_lock, 5541 .mand_unlock_range = smb2_unlock_range, 5542 .push_mand_locks = smb2_push_mandatory_locks, 5543 .get_lease_key = smb2_get_lease_key, 5544 .set_lease_key = smb2_set_lease_key, 5545 .new_lease_key = smb2_new_lease_key, 5546 .generate_signingkey = generate_smb30signingkey, 5547 .calc_signature = smb3_calc_signature, 5548 .set_integrity = smb3_set_integrity, 5549 .is_read_op = smb21_is_read_op, 5550 .set_oplock_level = smb3_set_oplock_level, 5551 .create_lease_buf = smb3_create_lease_buf, 5552 .parse_lease_buf = smb3_parse_lease_buf, 5553 .copychunk_range = smb2_copychunk_range, 5554 .duplicate_extents = smb2_duplicate_extents, 5555 .validate_negotiate = smb3_validate_negotiate, 5556 .wp_retry_size = smb2_wp_retry_size, 5557 .dir_needs_close = smb2_dir_needs_close, 5558 .fallocate = smb3_fallocate, 5559 .enum_snapshots = smb3_enum_snapshots, 5560 .notify = smb3_notify, 5561 .init_transform_rq = smb3_init_transform_rq, 5562 .is_transform_hdr = smb3_is_transform_hdr, 5563 .receive_transform = smb3_receive_transform, 5564 .get_dfs_refer = smb2_get_dfs_refer, 5565 .select_sectype = smb2_select_sectype, 5566 #ifdef CONFIG_CIFS_XATTR 5567 .query_all_EAs = smb2_query_eas, 5568 .set_EA = smb2_set_ea, 5569 #endif /* CIFS_XATTR */ 5570 .get_acl = get_smb2_acl, 5571 .get_acl_by_fid = get_smb2_acl_by_fid, 5572 .set_acl = set_smb2_acl, 5573 .next_header = smb2_next_header, 5574 .ioctl_query_info = smb2_ioctl_query_info, 5575 .make_node = smb2_make_node, 5576 .fiemap = smb3_fiemap, 5577 .llseek = smb3_llseek, 5578 .is_status_io_timeout = smb2_is_status_io_timeout, 5579 .is_network_name_deleted = smb2_is_network_name_deleted, 5580 }; 5581 5582 struct smb_version_operations smb311_operations = { 5583 .compare_fids = smb2_compare_fids, 5584 .setup_request = smb2_setup_request, 5585 .setup_async_request = smb2_setup_async_request, 5586 .check_receive = smb2_check_receive, 5587 .add_credits = smb2_add_credits, 5588 .set_credits = smb2_set_credits, 5589 .get_credits_field = smb2_get_credits_field, 5590 .get_credits = smb2_get_credits, 5591 .wait_mtu_credits = smb2_wait_mtu_credits, 5592 .adjust_credits = smb2_adjust_credits, 5593 .get_next_mid = smb2_get_next_mid, 5594 .revert_current_mid = smb2_revert_current_mid, 5595 .read_data_offset = smb2_read_data_offset, 5596 .read_data_length = smb2_read_data_length, 5597 .map_error = map_smb2_to_linux_error, 5598 .find_mid = smb2_find_mid, 5599 .check_message = smb2_check_message, 5600 .dump_detail = smb2_dump_detail, 5601 .clear_stats = smb2_clear_stats, 5602 .print_stats = smb2_print_stats, 5603 .dump_share_caps = smb2_dump_share_caps, 5604 .is_oplock_break = smb2_is_valid_oplock_break, 5605 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5606 .downgrade_oplock = smb3_downgrade_oplock, 5607 .need_neg = smb2_need_neg, 5608 .negotiate = smb2_negotiate, 5609 .negotiate_wsize = smb3_negotiate_wsize, 5610 .negotiate_rsize = smb3_negotiate_rsize, 5611 .sess_setup = SMB2_sess_setup, 5612 .logoff = SMB2_logoff, 5613 .tree_connect = SMB2_tcon, 5614 .tree_disconnect = SMB2_tdis, 5615 .qfs_tcon = smb3_qfs_tcon, 5616 .query_server_interfaces = SMB3_request_interfaces, 5617 .is_path_accessible = smb2_is_path_accessible, 5618 .can_echo = smb2_can_echo, 5619 .echo = SMB2_echo, 5620 .query_path_info = smb2_query_path_info, 5621 .query_reparse_point = smb2_query_reparse_point, 5622 .get_srv_inum = smb2_get_srv_inum, 5623 .query_file_info = smb2_query_file_info, 5624 .set_path_size = smb2_set_path_size, 5625 .set_file_size = smb2_set_file_size, 5626 .set_file_info = smb2_set_file_info, 5627 .set_compression = smb2_set_compression, 5628 .mkdir = smb2_mkdir, 5629 .mkdir_setinfo = smb2_mkdir_setinfo, 5630 .posix_mkdir = smb311_posix_mkdir, 5631 .rmdir = smb2_rmdir, 5632 .unlink = smb2_unlink, 5633 .rename = smb2_rename_path, 5634 .create_hardlink = smb2_create_hardlink, 5635 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5636 .query_mf_symlink = smb3_query_mf_symlink, 5637 .create_mf_symlink = smb3_create_mf_symlink, 5638 .create_reparse_symlink = smb2_create_reparse_symlink, 5639 .open = smb2_open_file, 5640 .set_fid = smb2_set_fid, 5641 .close = smb2_close_file, 5642 .close_getattr = smb2_close_getattr, 5643 .flush = smb2_flush_file, 5644 .async_readv = smb2_async_readv, 5645 .async_writev = smb2_async_writev, 5646 .sync_read = smb2_sync_read, 5647 .sync_write = smb2_sync_write, 5648 .query_dir_first = smb2_query_dir_first, 5649 .query_dir_next = smb2_query_dir_next, 5650 .close_dir = smb2_close_dir, 5651 .calc_smb_size = smb2_calc_size, 5652 .is_status_pending = smb2_is_status_pending, 5653 .is_session_expired = smb2_is_session_expired, 5654 .oplock_response = smb2_oplock_response, 5655 .queryfs = smb311_queryfs, 5656 .mand_lock = smb2_mand_lock, 5657 .mand_unlock_range = smb2_unlock_range, 5658 .push_mand_locks = smb2_push_mandatory_locks, 5659 .get_lease_key = smb2_get_lease_key, 5660 .set_lease_key = smb2_set_lease_key, 5661 .new_lease_key = smb2_new_lease_key, 5662 .generate_signingkey = generate_smb311signingkey, 5663 .calc_signature = smb3_calc_signature, 5664 .set_integrity = smb3_set_integrity, 5665 .is_read_op = smb21_is_read_op, 5666 .set_oplock_level = smb3_set_oplock_level, 5667 .create_lease_buf = smb3_create_lease_buf, 5668 .parse_lease_buf = smb3_parse_lease_buf, 5669 .copychunk_range = smb2_copychunk_range, 5670 .duplicate_extents = smb2_duplicate_extents, 5671 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5672 .wp_retry_size = smb2_wp_retry_size, 5673 .dir_needs_close = smb2_dir_needs_close, 5674 .fallocate = smb3_fallocate, 5675 .enum_snapshots = smb3_enum_snapshots, 5676 .notify = smb3_notify, 5677 .init_transform_rq = smb3_init_transform_rq, 5678 .is_transform_hdr = smb3_is_transform_hdr, 5679 .receive_transform = smb3_receive_transform, 5680 .get_dfs_refer = smb2_get_dfs_refer, 5681 .select_sectype = smb2_select_sectype, 5682 #ifdef CONFIG_CIFS_XATTR 5683 .query_all_EAs = smb2_query_eas, 5684 .set_EA = smb2_set_ea, 5685 #endif /* CIFS_XATTR */ 5686 .get_acl = get_smb2_acl, 5687 .get_acl_by_fid = get_smb2_acl_by_fid, 5688 .set_acl = set_smb2_acl, 5689 .next_header = smb2_next_header, 5690 .ioctl_query_info = smb2_ioctl_query_info, 5691 .make_node = smb2_make_node, 5692 .fiemap = smb3_fiemap, 5693 .llseek = smb3_llseek, 5694 .is_status_io_timeout = smb2_is_status_io_timeout, 5695 .is_network_name_deleted = smb2_is_network_name_deleted, 5696 }; 5697 5698 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5699 struct smb_version_values smb20_values = { 5700 .version_string = SMB20_VERSION_STRING, 5701 .protocol_id = SMB20_PROT_ID, 5702 .req_capabilities = 0, /* MBZ */ 5703 .large_lock_type = 0, 5704 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5705 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5706 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5707 .header_size = sizeof(struct smb2_hdr), 5708 .header_preamble_size = 0, 5709 .max_header_size = MAX_SMB2_HDR_SIZE, 5710 .read_rsp_size = sizeof(struct smb2_read_rsp), 5711 .lock_cmd = SMB2_LOCK, 5712 .cap_unix = 0, 5713 .cap_nt_find = SMB2_NT_FIND, 5714 .cap_large_files = SMB2_LARGE_FILES, 5715 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5716 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5717 .create_lease_size = sizeof(struct create_lease), 5718 }; 5719 #endif /* ALLOW_INSECURE_LEGACY */ 5720 5721 struct smb_version_values smb21_values = { 5722 .version_string = SMB21_VERSION_STRING, 5723 .protocol_id = SMB21_PROT_ID, 5724 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5725 .large_lock_type = 0, 5726 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5727 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5728 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5729 .header_size = sizeof(struct smb2_hdr), 5730 .header_preamble_size = 0, 5731 .max_header_size = MAX_SMB2_HDR_SIZE, 5732 .read_rsp_size = sizeof(struct smb2_read_rsp), 5733 .lock_cmd = SMB2_LOCK, 5734 .cap_unix = 0, 5735 .cap_nt_find = SMB2_NT_FIND, 5736 .cap_large_files = SMB2_LARGE_FILES, 5737 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5738 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5739 .create_lease_size = sizeof(struct create_lease), 5740 }; 5741 5742 struct smb_version_values smb3any_values = { 5743 .version_string = SMB3ANY_VERSION_STRING, 5744 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5745 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, 5746 .large_lock_type = 0, 5747 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5748 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5749 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5750 .header_size = sizeof(struct smb2_hdr), 5751 .header_preamble_size = 0, 5752 .max_header_size = MAX_SMB2_HDR_SIZE, 5753 .read_rsp_size = sizeof(struct smb2_read_rsp), 5754 .lock_cmd = SMB2_LOCK, 5755 .cap_unix = 0, 5756 .cap_nt_find = SMB2_NT_FIND, 5757 .cap_large_files = SMB2_LARGE_FILES, 5758 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5759 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5760 .create_lease_size = sizeof(struct create_lease_v2), 5761 }; 5762 5763 struct smb_version_values smbdefault_values = { 5764 .version_string = SMBDEFAULT_VERSION_STRING, 5765 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5766 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, 5767 .large_lock_type = 0, 5768 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5769 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5770 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5771 .header_size = sizeof(struct smb2_hdr), 5772 .header_preamble_size = 0, 5773 .max_header_size = MAX_SMB2_HDR_SIZE, 5774 .read_rsp_size = sizeof(struct smb2_read_rsp), 5775 .lock_cmd = SMB2_LOCK, 5776 .cap_unix = 0, 5777 .cap_nt_find = SMB2_NT_FIND, 5778 .cap_large_files = SMB2_LARGE_FILES, 5779 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5780 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5781 .create_lease_size = sizeof(struct create_lease_v2), 5782 }; 5783 5784 struct smb_version_values smb30_values = { 5785 .version_string = SMB30_VERSION_STRING, 5786 .protocol_id = SMB30_PROT_ID, 5787 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, 5788 .large_lock_type = 0, 5789 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5790 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5791 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5792 .header_size = sizeof(struct smb2_hdr), 5793 .header_preamble_size = 0, 5794 .max_header_size = MAX_SMB2_HDR_SIZE, 5795 .read_rsp_size = sizeof(struct smb2_read_rsp), 5796 .lock_cmd = SMB2_LOCK, 5797 .cap_unix = 0, 5798 .cap_nt_find = SMB2_NT_FIND, 5799 .cap_large_files = SMB2_LARGE_FILES, 5800 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5801 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5802 .create_lease_size = sizeof(struct create_lease_v2), 5803 }; 5804 5805 struct smb_version_values smb302_values = { 5806 .version_string = SMB302_VERSION_STRING, 5807 .protocol_id = SMB302_PROT_ID, 5808 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, 5809 .large_lock_type = 0, 5810 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5811 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5812 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5813 .header_size = sizeof(struct smb2_hdr), 5814 .header_preamble_size = 0, 5815 .max_header_size = MAX_SMB2_HDR_SIZE, 5816 .read_rsp_size = sizeof(struct smb2_read_rsp), 5817 .lock_cmd = SMB2_LOCK, 5818 .cap_unix = 0, 5819 .cap_nt_find = SMB2_NT_FIND, 5820 .cap_large_files = SMB2_LARGE_FILES, 5821 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5822 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5823 .create_lease_size = sizeof(struct create_lease_v2), 5824 }; 5825 5826 struct smb_version_values smb311_values = { 5827 .version_string = SMB311_VERSION_STRING, 5828 .protocol_id = SMB311_PROT_ID, 5829 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, 5830 .large_lock_type = 0, 5831 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5832 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5833 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5834 .header_size = sizeof(struct smb2_hdr), 5835 .header_preamble_size = 0, 5836 .max_header_size = MAX_SMB2_HDR_SIZE, 5837 .read_rsp_size = sizeof(struct smb2_read_rsp), 5838 .lock_cmd = SMB2_LOCK, 5839 .cap_unix = 0, 5840 .cap_nt_find = SMB2_NT_FIND, 5841 .cap_large_files = SMB2_LARGE_FILES, 5842 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5843 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5844 .create_lease_size = sizeof(struct create_lease_v2), 5845 }; 5846