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 struct smbdirect_socket_parameters *sp = 508 &server->smbd_conn->socket.parameters; 509 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 wsize = min_t(unsigned int, 516 wsize, 517 sp->max_fragmented_send_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 wsize = min_t(unsigned int, 522 wsize, sp->max_read_write_size); 523 } 524 #endif 525 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 526 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 527 528 return prevent_zero_iosize(wsize, "w"); 529 } 530 531 static unsigned int 532 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 533 { 534 struct TCP_Server_Info *server = tcon->ses->server; 535 unsigned int rsize; 536 537 /* start with specified rsize, or default */ 538 rsize = ctx->got_rsize ? ctx->vol_rsize : CIFS_DEFAULT_IOSIZE; 539 rsize = min_t(unsigned int, rsize, server->max_read); 540 541 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 542 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 543 544 return prevent_zero_iosize(rsize, "r"); 545 } 546 547 static unsigned int 548 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 549 { 550 struct TCP_Server_Info *server = tcon->ses->server; 551 unsigned int rsize; 552 553 /* start with specified rsize, or default */ 554 rsize = ctx->got_rsize ? ctx->vol_rsize : SMB3_DEFAULT_IOSIZE; 555 rsize = min_t(unsigned int, rsize, server->max_read); 556 #ifdef CONFIG_CIFS_SMB_DIRECT 557 if (server->rdma) { 558 struct smbdirect_socket_parameters *sp = 559 &server->smbd_conn->socket.parameters; 560 561 if (server->sign) 562 /* 563 * Account for SMB2 data transfer packet header and 564 * possible encryption header 565 */ 566 rsize = min_t(unsigned int, 567 rsize, 568 sp->max_fragmented_recv_size - 569 SMB2_READWRITE_PDU_HEADER_SIZE - 570 sizeof(struct smb2_transform_hdr)); 571 else 572 rsize = min_t(unsigned int, 573 rsize, sp->max_read_write_size); 574 } 575 #endif 576 577 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 578 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 579 580 return prevent_zero_iosize(rsize, "r"); 581 } 582 583 /* 584 * compare two interfaces a and b 585 * return 0 if everything matches. 586 * return 1 if a is rdma capable, or rss capable, or has higher link speed 587 * return -1 otherwise. 588 */ 589 static int 590 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 591 { 592 int cmp_ret = 0; 593 594 WARN_ON(!a || !b); 595 if (a->rdma_capable == b->rdma_capable) { 596 if (a->rss_capable == b->rss_capable) { 597 if (a->speed == b->speed) { 598 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 599 (struct sockaddr *) &b->sockaddr); 600 if (!cmp_ret) 601 return 0; 602 else if (cmp_ret > 0) 603 return 1; 604 else 605 return -1; 606 } else if (a->speed > b->speed) 607 return 1; 608 else 609 return -1; 610 } else if (a->rss_capable > b->rss_capable) 611 return 1; 612 else 613 return -1; 614 } else if (a->rdma_capable > b->rdma_capable) 615 return 1; 616 else 617 return -1; 618 } 619 620 static int 621 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 622 size_t buf_len, struct cifs_ses *ses, bool in_mount) 623 { 624 struct network_interface_info_ioctl_rsp *p; 625 struct sockaddr_in *addr4; 626 struct sockaddr_in6 *addr6; 627 struct iface_info_ipv4 *p4; 628 struct iface_info_ipv6 *p6; 629 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 630 struct cifs_server_iface tmp_iface; 631 ssize_t bytes_left; 632 size_t next = 0; 633 int nb_iface = 0; 634 int rc = 0, ret = 0; 635 636 bytes_left = buf_len; 637 p = buf; 638 639 spin_lock(&ses->iface_lock); 640 /* do not query too frequently, this time with lock held */ 641 if (ses->iface_last_update && 642 time_before(jiffies, ses->iface_last_update + 643 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 644 spin_unlock(&ses->iface_lock); 645 return 0; 646 } 647 648 /* 649 * Go through iface_list and mark them as inactive 650 */ 651 list_for_each_entry_safe(iface, niface, &ses->iface_list, 652 iface_head) 653 iface->is_active = 0; 654 655 spin_unlock(&ses->iface_lock); 656 657 /* 658 * Samba server e.g. can return an empty interface list in some cases, 659 * which would only be a problem if we were requesting multichannel 660 */ 661 if (bytes_left == 0) { 662 /* avoid spamming logs every 10 minutes, so log only in mount */ 663 if ((ses->chan_max > 1) && in_mount) 664 cifs_dbg(VFS, 665 "multichannel not available\n" 666 "Empty network interface list returned by server %s\n", 667 ses->server->hostname); 668 rc = -EOPNOTSUPP; 669 ses->iface_last_update = jiffies; 670 goto out; 671 } 672 673 while (bytes_left >= (ssize_t)sizeof(*p)) { 674 memset(&tmp_iface, 0, sizeof(tmp_iface)); 675 /* default to 1Gbps when link speed is unset */ 676 tmp_iface.speed = le64_to_cpu(p->LinkSpeed) ?: 1000000000; 677 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 678 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 679 680 switch (p->Family) { 681 /* 682 * The kernel and wire socket structures have the same 683 * layout and use network byte order but make the 684 * conversion explicit in case either one changes. 685 */ 686 case INTERNETWORK: 687 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 688 p4 = (struct iface_info_ipv4 *)p->Buffer; 689 addr4->sin_family = AF_INET; 690 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 691 692 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 693 addr4->sin_port = cpu_to_be16(CIFS_PORT); 694 695 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 696 &addr4->sin_addr); 697 break; 698 case INTERNETWORKV6: 699 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 700 p6 = (struct iface_info_ipv6 *)p->Buffer; 701 addr6->sin6_family = AF_INET6; 702 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 703 704 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 705 addr6->sin6_flowinfo = 0; 706 addr6->sin6_scope_id = 0; 707 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 708 709 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 710 &addr6->sin6_addr); 711 break; 712 default: 713 cifs_dbg(VFS, 714 "%s: skipping unsupported socket family\n", 715 __func__); 716 goto next_iface; 717 } 718 719 /* 720 * The iface_list is assumed to be sorted by speed. 721 * Check if the new interface exists in that list. 722 * NEVER change iface. it could be in use. 723 * Add a new one instead 724 */ 725 spin_lock(&ses->iface_lock); 726 list_for_each_entry_safe(iface, niface, &ses->iface_list, 727 iface_head) { 728 ret = iface_cmp(iface, &tmp_iface); 729 if (!ret) { 730 iface->is_active = 1; 731 spin_unlock(&ses->iface_lock); 732 goto next_iface; 733 } else if (ret < 0) { 734 /* all remaining ifaces are slower */ 735 kref_get(&iface->refcount); 736 break; 737 } 738 } 739 spin_unlock(&ses->iface_lock); 740 741 /* no match. insert the entry in the list */ 742 info = kmalloc(sizeof(struct cifs_server_iface), 743 GFP_KERNEL); 744 if (!info) { 745 rc = -ENOMEM; 746 goto out; 747 } 748 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 749 750 /* add this new entry to the list */ 751 kref_init(&info->refcount); 752 info->is_active = 1; 753 754 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 755 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 756 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 757 le32_to_cpu(p->Capability)); 758 759 spin_lock(&ses->iface_lock); 760 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 761 list_add_tail(&info->iface_head, &iface->iface_head); 762 kref_put(&iface->refcount, release_iface); 763 } else 764 list_add_tail(&info->iface_head, &ses->iface_list); 765 766 ses->iface_count++; 767 spin_unlock(&ses->iface_lock); 768 next_iface: 769 nb_iface++; 770 next = le32_to_cpu(p->Next); 771 if (!next) { 772 bytes_left -= sizeof(*p); 773 break; 774 } 775 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 776 bytes_left -= next; 777 } 778 779 if (!nb_iface) { 780 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 781 rc = -EINVAL; 782 goto out; 783 } 784 785 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 786 if ((bytes_left > 8) || p->Next) 787 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 788 789 ses->iface_last_update = jiffies; 790 791 out: 792 /* 793 * Go through the list again and put the inactive entries 794 */ 795 spin_lock(&ses->iface_lock); 796 list_for_each_entry_safe(iface, niface, &ses->iface_list, 797 iface_head) { 798 if (!iface->is_active) { 799 list_del(&iface->iface_head); 800 kref_put(&iface->refcount, release_iface); 801 ses->iface_count--; 802 } 803 } 804 spin_unlock(&ses->iface_lock); 805 806 return rc; 807 } 808 809 int 810 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 811 { 812 int rc; 813 unsigned int ret_data_len = 0; 814 struct network_interface_info_ioctl_rsp *out_buf = NULL; 815 struct cifs_ses *ses = tcon->ses; 816 struct TCP_Server_Info *pserver; 817 818 /* do not query too frequently */ 819 if (ses->iface_last_update && 820 time_before(jiffies, ses->iface_last_update + 821 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 822 return 0; 823 824 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 825 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 826 NULL /* no data input */, 0 /* no data input */, 827 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 828 if (rc == -EOPNOTSUPP) { 829 cifs_dbg(FYI, 830 "server does not support query network interfaces\n"); 831 ret_data_len = 0; 832 } else if (rc != 0) { 833 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 834 goto out; 835 } 836 837 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 838 if (rc) 839 goto out; 840 841 /* check if iface is still active */ 842 spin_lock(&ses->chan_lock); 843 pserver = ses->chans[0].server; 844 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 845 spin_unlock(&ses->chan_lock); 846 cifs_chan_update_iface(ses, pserver); 847 spin_lock(&ses->chan_lock); 848 } 849 spin_unlock(&ses->chan_lock); 850 851 out: 852 kfree(out_buf); 853 return rc; 854 } 855 856 static void 857 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 858 struct cifs_sb_info *cifs_sb) 859 { 860 int rc; 861 __le16 srch_path = 0; /* Null - open root of share */ 862 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 863 struct cifs_open_parms oparms; 864 struct cifs_fid fid; 865 struct cached_fid *cfid = NULL; 866 867 oparms = (struct cifs_open_parms) { 868 .tcon = tcon, 869 .path = "", 870 .desired_access = FILE_READ_ATTRIBUTES, 871 .disposition = FILE_OPEN, 872 .create_options = cifs_create_options(cifs_sb, 0), 873 .fid = &fid, 874 }; 875 876 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 877 if (rc == 0) 878 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 879 else 880 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 881 NULL, NULL); 882 if (rc) 883 return; 884 885 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 886 887 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 888 FS_ATTRIBUTE_INFORMATION); 889 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 890 FS_DEVICE_INFORMATION); 891 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 892 FS_VOLUME_INFORMATION); 893 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 894 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 895 if (cfid == NULL) 896 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 897 else 898 close_cached_dir(cfid); 899 } 900 901 static void 902 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 903 struct cifs_sb_info *cifs_sb) 904 { 905 int rc; 906 __le16 srch_path = 0; /* Null - open root of share */ 907 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 908 struct cifs_open_parms oparms; 909 struct cifs_fid fid; 910 911 oparms = (struct cifs_open_parms) { 912 .tcon = tcon, 913 .path = "", 914 .desired_access = FILE_READ_ATTRIBUTES, 915 .disposition = FILE_OPEN, 916 .create_options = cifs_create_options(cifs_sb, 0), 917 .fid = &fid, 918 }; 919 920 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 921 NULL, NULL); 922 if (rc) 923 return; 924 925 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 926 FS_ATTRIBUTE_INFORMATION); 927 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 928 FS_DEVICE_INFORMATION); 929 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 930 } 931 932 static int 933 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 934 struct cifs_sb_info *cifs_sb, const char *full_path) 935 { 936 __le16 *utf16_path; 937 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 938 int err_buftype = CIFS_NO_BUFFER; 939 struct cifs_open_parms oparms; 940 struct kvec err_iov = {}; 941 struct cifs_fid fid; 942 struct cached_fid *cfid; 943 bool islink; 944 int rc, rc2; 945 946 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 947 if (!rc) { 948 if (cfid->has_lease) { 949 close_cached_dir(cfid); 950 return 0; 951 } 952 close_cached_dir(cfid); 953 } 954 955 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 956 if (!utf16_path) 957 return -ENOMEM; 958 959 oparms = (struct cifs_open_parms) { 960 .tcon = tcon, 961 .path = full_path, 962 .desired_access = FILE_READ_ATTRIBUTES, 963 .disposition = FILE_OPEN, 964 .create_options = cifs_create_options(cifs_sb, 0), 965 .fid = &fid, 966 }; 967 968 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 969 &err_iov, &err_buftype); 970 if (rc) { 971 struct smb2_hdr *hdr = err_iov.iov_base; 972 973 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 974 goto out; 975 976 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 977 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 978 full_path, &islink); 979 if (rc2) { 980 rc = rc2; 981 goto out; 982 } 983 if (islink) 984 rc = -EREMOTE; 985 } 986 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && 987 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 988 rc = -EOPNOTSUPP; 989 goto out; 990 } 991 992 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 993 994 out: 995 free_rsp_buf(err_buftype, err_iov.iov_base); 996 kfree(utf16_path); 997 return rc; 998 } 999 1000 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 1001 struct cifs_sb_info *cifs_sb, const char *full_path, 1002 u64 *uniqueid, struct cifs_open_info_data *data) 1003 { 1004 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 1005 return 0; 1006 } 1007 1008 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 1009 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 1010 { 1011 struct cifs_fid *fid = &cfile->fid; 1012 1013 if (cfile->symlink_target) { 1014 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 1015 if (!data->symlink_target) 1016 return -ENOMEM; 1017 } 1018 data->contains_posix_file_info = false; 1019 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 1020 } 1021 1022 #ifdef CONFIG_CIFS_XATTR 1023 static ssize_t 1024 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 1025 struct smb2_file_full_ea_info *src, size_t src_size, 1026 const unsigned char *ea_name) 1027 { 1028 int rc = 0; 1029 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 1030 char *name, *value; 1031 size_t buf_size = dst_size; 1032 size_t name_len, value_len, user_name_len; 1033 1034 while (src_size > 0) { 1035 name_len = (size_t)src->ea_name_length; 1036 value_len = (size_t)le16_to_cpu(src->ea_value_length); 1037 1038 if (name_len == 0) 1039 break; 1040 1041 if (src_size < 8 + name_len + 1 + value_len) { 1042 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 1043 rc = -EIO; 1044 goto out; 1045 } 1046 1047 name = &src->ea_data[0]; 1048 value = &src->ea_data[src->ea_name_length + 1]; 1049 1050 if (ea_name) { 1051 if (ea_name_len == name_len && 1052 memcmp(ea_name, name, name_len) == 0) { 1053 rc = value_len; 1054 if (dst_size == 0) 1055 goto out; 1056 if (dst_size < value_len) { 1057 rc = -ERANGE; 1058 goto out; 1059 } 1060 memcpy(dst, value, value_len); 1061 goto out; 1062 } 1063 } else { 1064 /* 'user.' plus a terminating null */ 1065 user_name_len = 5 + 1 + name_len; 1066 1067 if (buf_size == 0) { 1068 /* skip copy - calc size only */ 1069 rc += user_name_len; 1070 } else if (dst_size >= user_name_len) { 1071 dst_size -= user_name_len; 1072 memcpy(dst, "user.", 5); 1073 dst += 5; 1074 memcpy(dst, src->ea_data, name_len); 1075 dst += name_len; 1076 *dst = 0; 1077 ++dst; 1078 rc += user_name_len; 1079 } else { 1080 /* stop before overrun buffer */ 1081 rc = -ERANGE; 1082 break; 1083 } 1084 } 1085 1086 if (!src->next_entry_offset) 1087 break; 1088 1089 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1090 /* stop before overrun buffer */ 1091 rc = -ERANGE; 1092 break; 1093 } 1094 src_size -= le32_to_cpu(src->next_entry_offset); 1095 src = (void *)((char *)src + 1096 le32_to_cpu(src->next_entry_offset)); 1097 } 1098 1099 /* didn't find the named attribute */ 1100 if (ea_name) 1101 rc = -ENODATA; 1102 1103 out: 1104 return (ssize_t)rc; 1105 } 1106 1107 static ssize_t 1108 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1109 const unsigned char *path, const unsigned char *ea_name, 1110 char *ea_data, size_t buf_size, 1111 struct cifs_sb_info *cifs_sb) 1112 { 1113 int rc; 1114 struct kvec rsp_iov = {NULL, 0}; 1115 int buftype = CIFS_NO_BUFFER; 1116 struct smb2_query_info_rsp *rsp; 1117 struct smb2_file_full_ea_info *info = NULL; 1118 1119 rc = smb2_query_info_compound(xid, tcon, path, 1120 FILE_READ_EA, 1121 FILE_FULL_EA_INFORMATION, 1122 SMB2_O_INFO_FILE, 1123 CIFSMaxBufSize - 1124 MAX_SMB2_CREATE_RESPONSE_SIZE - 1125 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1126 &rsp_iov, &buftype, cifs_sb); 1127 if (rc) { 1128 /* 1129 * If ea_name is NULL (listxattr) and there are no EAs, 1130 * return 0 as it's not an error. Otherwise, the specified 1131 * ea_name was not found. 1132 */ 1133 if (!ea_name && rc == -ENODATA) 1134 rc = 0; 1135 goto qeas_exit; 1136 } 1137 1138 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1139 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1140 le32_to_cpu(rsp->OutputBufferLength), 1141 &rsp_iov, 1142 sizeof(struct smb2_file_full_ea_info)); 1143 if (rc) 1144 goto qeas_exit; 1145 1146 info = (struct smb2_file_full_ea_info *)( 1147 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1148 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1149 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1150 1151 qeas_exit: 1152 free_rsp_buf(buftype, rsp_iov.iov_base); 1153 return rc; 1154 } 1155 1156 static int 1157 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1158 const char *path, const char *ea_name, const void *ea_value, 1159 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1160 struct cifs_sb_info *cifs_sb) 1161 { 1162 struct smb2_compound_vars *vars; 1163 struct cifs_ses *ses = tcon->ses; 1164 struct TCP_Server_Info *server; 1165 struct smb_rqst *rqst; 1166 struct kvec *rsp_iov; 1167 __le16 *utf16_path = NULL; 1168 int ea_name_len = strlen(ea_name); 1169 int flags = CIFS_CP_CREATE_CLOSE_OP; 1170 int len; 1171 int resp_buftype[3]; 1172 struct cifs_open_parms oparms; 1173 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1174 struct cifs_fid fid; 1175 unsigned int size[1]; 1176 void *data[1]; 1177 struct smb2_file_full_ea_info *ea; 1178 struct smb2_query_info_rsp *rsp; 1179 int rc, used_len = 0; 1180 int retries = 0, cur_sleep = 1; 1181 1182 replay_again: 1183 /* reinitialize for possible replay */ 1184 flags = CIFS_CP_CREATE_CLOSE_OP; 1185 oplock = SMB2_OPLOCK_LEVEL_NONE; 1186 server = cifs_pick_channel(ses); 1187 1188 if (smb3_encryption_required(tcon)) 1189 flags |= CIFS_TRANSFORM_REQ; 1190 1191 if (ea_name_len > 255) 1192 return -EINVAL; 1193 1194 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1195 if (!utf16_path) 1196 return -ENOMEM; 1197 1198 ea = NULL; 1199 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1200 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1201 if (!vars) { 1202 rc = -ENOMEM; 1203 goto out_free_path; 1204 } 1205 rqst = vars->rqst; 1206 rsp_iov = vars->rsp_iov; 1207 1208 if (ses->server->ops->query_all_EAs) { 1209 if (!ea_value) { 1210 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1211 ea_name, NULL, 0, 1212 cifs_sb); 1213 if (rc == -ENODATA) 1214 goto sea_exit; 1215 } else { 1216 /* If we are adding a attribute we should first check 1217 * if there will be enough space available to store 1218 * the new EA. If not we should not add it since we 1219 * would not be able to even read the EAs back. 1220 */ 1221 rc = smb2_query_info_compound(xid, tcon, path, 1222 FILE_READ_EA, 1223 FILE_FULL_EA_INFORMATION, 1224 SMB2_O_INFO_FILE, 1225 CIFSMaxBufSize - 1226 MAX_SMB2_CREATE_RESPONSE_SIZE - 1227 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1228 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1229 if (rc == 0) { 1230 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1231 used_len = le32_to_cpu(rsp->OutputBufferLength); 1232 } 1233 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1234 resp_buftype[1] = CIFS_NO_BUFFER; 1235 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1236 rc = 0; 1237 1238 /* Use a fudge factor of 256 bytes in case we collide 1239 * with a different set_EAs command. 1240 */ 1241 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1242 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1243 used_len + ea_name_len + ea_value_len + 1) { 1244 rc = -ENOSPC; 1245 goto sea_exit; 1246 } 1247 } 1248 } 1249 1250 /* Open */ 1251 rqst[0].rq_iov = vars->open_iov; 1252 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1253 1254 oparms = (struct cifs_open_parms) { 1255 .tcon = tcon, 1256 .path = path, 1257 .desired_access = FILE_WRITE_EA, 1258 .disposition = FILE_OPEN, 1259 .create_options = cifs_create_options(cifs_sb, 0), 1260 .fid = &fid, 1261 .replay = !!(retries), 1262 }; 1263 1264 rc = SMB2_open_init(tcon, server, 1265 &rqst[0], &oplock, &oparms, utf16_path); 1266 if (rc) 1267 goto sea_exit; 1268 smb2_set_next_command(tcon, &rqst[0]); 1269 1270 1271 /* Set Info */ 1272 rqst[1].rq_iov = vars->si_iov; 1273 rqst[1].rq_nvec = 1; 1274 1275 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1276 ea = kzalloc(len, GFP_KERNEL); 1277 if (ea == NULL) { 1278 rc = -ENOMEM; 1279 goto sea_exit; 1280 } 1281 1282 ea->ea_name_length = ea_name_len; 1283 ea->ea_value_length = cpu_to_le16(ea_value_len); 1284 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1285 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1286 1287 size[0] = len; 1288 data[0] = ea; 1289 1290 rc = SMB2_set_info_init(tcon, server, 1291 &rqst[1], COMPOUND_FID, 1292 COMPOUND_FID, current->tgid, 1293 FILE_FULL_EA_INFORMATION, 1294 SMB2_O_INFO_FILE, 0, data, size); 1295 if (rc) 1296 goto sea_exit; 1297 smb2_set_next_command(tcon, &rqst[1]); 1298 smb2_set_related(&rqst[1]); 1299 1300 /* Close */ 1301 rqst[2].rq_iov = &vars->close_iov; 1302 rqst[2].rq_nvec = 1; 1303 rc = SMB2_close_init(tcon, server, 1304 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1305 if (rc) 1306 goto sea_exit; 1307 smb2_set_related(&rqst[2]); 1308 1309 if (retries) { 1310 smb2_set_replay(server, &rqst[0]); 1311 smb2_set_replay(server, &rqst[1]); 1312 smb2_set_replay(server, &rqst[2]); 1313 } 1314 1315 rc = compound_send_recv(xid, ses, server, 1316 flags, 3, rqst, 1317 resp_buftype, rsp_iov); 1318 /* no need to bump num_remote_opens because handle immediately closed */ 1319 1320 sea_exit: 1321 kfree(ea); 1322 SMB2_open_free(&rqst[0]); 1323 SMB2_set_info_free(&rqst[1]); 1324 SMB2_close_free(&rqst[2]); 1325 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1326 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1327 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1328 kfree(vars); 1329 out_free_path: 1330 kfree(utf16_path); 1331 1332 if (is_replayable_error(rc) && 1333 smb2_should_replay(tcon, &retries, &cur_sleep)) 1334 goto replay_again; 1335 1336 return rc; 1337 } 1338 #endif 1339 1340 static bool 1341 smb2_can_echo(struct TCP_Server_Info *server) 1342 { 1343 return server->echoes; 1344 } 1345 1346 static void 1347 smb2_clear_stats(struct cifs_tcon *tcon) 1348 { 1349 int i; 1350 1351 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1352 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1353 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1354 } 1355 } 1356 1357 static void 1358 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1359 { 1360 seq_puts(m, "\n\tShare Capabilities:"); 1361 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1362 seq_puts(m, " DFS,"); 1363 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1364 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1365 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1366 seq_puts(m, " SCALEOUT,"); 1367 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1368 seq_puts(m, " CLUSTER,"); 1369 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1370 seq_puts(m, " ASYMMETRIC,"); 1371 if (tcon->capabilities == 0) 1372 seq_puts(m, " None"); 1373 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1374 seq_puts(m, " Aligned,"); 1375 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1376 seq_puts(m, " Partition Aligned,"); 1377 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1378 seq_puts(m, " SSD,"); 1379 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1380 seq_puts(m, " TRIM-support,"); 1381 1382 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1383 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1384 if (tcon->perf_sector_size) 1385 seq_printf(m, "\tOptimal sector size: 0x%x", 1386 tcon->perf_sector_size); 1387 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1388 } 1389 1390 static void 1391 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1392 { 1393 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1394 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1395 1396 /* 1397 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1398 * totals (requests sent) since those SMBs are per-session not per tcon 1399 */ 1400 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1401 (long long)(tcon->bytes_read), 1402 (long long)(tcon->bytes_written)); 1403 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1404 atomic_read(&tcon->num_local_opens), 1405 atomic_read(&tcon->num_remote_opens)); 1406 seq_printf(m, "\nTreeConnects: %d total %d failed", 1407 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1408 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1409 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1410 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1411 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1412 seq_printf(m, "\nCreates: %d total %d failed", 1413 atomic_read(&sent[SMB2_CREATE_HE]), 1414 atomic_read(&failed[SMB2_CREATE_HE])); 1415 seq_printf(m, "\nCloses: %d total %d failed", 1416 atomic_read(&sent[SMB2_CLOSE_HE]), 1417 atomic_read(&failed[SMB2_CLOSE_HE])); 1418 seq_printf(m, "\nFlushes: %d total %d failed", 1419 atomic_read(&sent[SMB2_FLUSH_HE]), 1420 atomic_read(&failed[SMB2_FLUSH_HE])); 1421 seq_printf(m, "\nReads: %d total %d failed", 1422 atomic_read(&sent[SMB2_READ_HE]), 1423 atomic_read(&failed[SMB2_READ_HE])); 1424 seq_printf(m, "\nWrites: %d total %d failed", 1425 atomic_read(&sent[SMB2_WRITE_HE]), 1426 atomic_read(&failed[SMB2_WRITE_HE])); 1427 seq_printf(m, "\nLocks: %d total %d failed", 1428 atomic_read(&sent[SMB2_LOCK_HE]), 1429 atomic_read(&failed[SMB2_LOCK_HE])); 1430 seq_printf(m, "\nIOCTLs: %d total %d failed", 1431 atomic_read(&sent[SMB2_IOCTL_HE]), 1432 atomic_read(&failed[SMB2_IOCTL_HE])); 1433 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1434 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1435 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1436 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1437 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1438 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1439 seq_printf(m, "\nQueryInfos: %d total %d failed", 1440 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1441 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1442 seq_printf(m, "\nSetInfos: %d total %d failed", 1443 atomic_read(&sent[SMB2_SET_INFO_HE]), 1444 atomic_read(&failed[SMB2_SET_INFO_HE])); 1445 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1446 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1447 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1448 } 1449 1450 static void 1451 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1452 { 1453 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1454 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1455 1456 cfile->fid.persistent_fid = fid->persistent_fid; 1457 cfile->fid.volatile_fid = fid->volatile_fid; 1458 cfile->fid.access = fid->access; 1459 #ifdef CONFIG_CIFS_DEBUG2 1460 cfile->fid.mid = fid->mid; 1461 #endif /* CIFS_DEBUG2 */ 1462 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1463 &fid->purge_cache); 1464 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1465 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1466 } 1467 1468 static int 1469 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1470 struct cifs_fid *fid) 1471 { 1472 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1473 } 1474 1475 static int 1476 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1477 struct cifsFileInfo *cfile) 1478 { 1479 struct smb2_file_network_open_info file_inf; 1480 struct inode *inode; 1481 int rc; 1482 1483 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1484 cfile->fid.volatile_fid, &file_inf); 1485 if (rc) 1486 return rc; 1487 1488 inode = d_inode(cfile->dentry); 1489 1490 spin_lock(&inode->i_lock); 1491 CIFS_I(inode)->time = jiffies; 1492 1493 /* Creation time should not need to be updated on close */ 1494 if (file_inf.LastWriteTime) 1495 inode_set_mtime_to_ts(inode, 1496 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1497 if (file_inf.ChangeTime) 1498 inode_set_ctime_to_ts(inode, 1499 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1500 if (file_inf.LastAccessTime) 1501 inode_set_atime_to_ts(inode, 1502 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1503 1504 /* 1505 * i_blocks is not related to (i_size / i_blksize), 1506 * but instead 512 byte (2**9) size is required for 1507 * calculating num blocks. 1508 */ 1509 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1510 inode->i_blocks = 1511 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1512 1513 /* End of file and Attributes should not have to be updated on close */ 1514 spin_unlock(&inode->i_lock); 1515 return rc; 1516 } 1517 1518 static int 1519 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1520 u64 persistent_fid, u64 volatile_fid, 1521 struct copychunk_ioctl *pcchunk) 1522 { 1523 int rc; 1524 unsigned int ret_data_len; 1525 struct resume_key_req *res_key; 1526 1527 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1528 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1529 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1530 1531 if (rc == -EOPNOTSUPP) { 1532 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1533 goto req_res_key_exit; 1534 } else if (rc) { 1535 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1536 goto req_res_key_exit; 1537 } 1538 if (ret_data_len < sizeof(struct resume_key_req)) { 1539 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1540 rc = -EINVAL; 1541 goto req_res_key_exit; 1542 } 1543 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1544 1545 req_res_key_exit: 1546 kfree(res_key); 1547 return rc; 1548 } 1549 1550 static int 1551 smb2_ioctl_query_info(const unsigned int xid, 1552 struct cifs_tcon *tcon, 1553 struct cifs_sb_info *cifs_sb, 1554 __le16 *path, int is_dir, 1555 unsigned long p) 1556 { 1557 struct smb2_compound_vars *vars; 1558 struct smb_rqst *rqst; 1559 struct kvec *rsp_iov; 1560 struct cifs_ses *ses = tcon->ses; 1561 struct TCP_Server_Info *server; 1562 char __user *arg = (char __user *)p; 1563 struct smb_query_info qi; 1564 struct smb_query_info __user *pqi; 1565 int rc = 0; 1566 int flags = CIFS_CP_CREATE_CLOSE_OP; 1567 struct smb2_query_info_rsp *qi_rsp = NULL; 1568 struct smb2_ioctl_rsp *io_rsp = NULL; 1569 void *buffer = NULL; 1570 int resp_buftype[3]; 1571 struct cifs_open_parms oparms; 1572 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1573 struct cifs_fid fid; 1574 unsigned int size[2]; 1575 void *data[2]; 1576 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1577 void (*free_req1_func)(struct smb_rqst *r); 1578 int retries = 0, cur_sleep = 1; 1579 1580 replay_again: 1581 /* reinitialize for possible replay */ 1582 flags = CIFS_CP_CREATE_CLOSE_OP; 1583 oplock = SMB2_OPLOCK_LEVEL_NONE; 1584 server = cifs_pick_channel(ses); 1585 1586 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1587 if (vars == NULL) 1588 return -ENOMEM; 1589 rqst = &vars->rqst[0]; 1590 rsp_iov = &vars->rsp_iov[0]; 1591 1592 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1593 1594 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1595 rc = -EFAULT; 1596 goto free_vars; 1597 } 1598 if (qi.output_buffer_length > 1024) { 1599 rc = -EINVAL; 1600 goto free_vars; 1601 } 1602 1603 if (!ses || !server) { 1604 rc = -EIO; 1605 goto free_vars; 1606 } 1607 1608 if (smb3_encryption_required(tcon)) 1609 flags |= CIFS_TRANSFORM_REQ; 1610 1611 if (qi.output_buffer_length) { 1612 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1613 if (IS_ERR(buffer)) { 1614 rc = PTR_ERR(buffer); 1615 goto free_vars; 1616 } 1617 } 1618 1619 /* Open */ 1620 rqst[0].rq_iov = &vars->open_iov[0]; 1621 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1622 1623 oparms = (struct cifs_open_parms) { 1624 .tcon = tcon, 1625 .disposition = FILE_OPEN, 1626 .create_options = cifs_create_options(cifs_sb, create_options), 1627 .fid = &fid, 1628 .replay = !!(retries), 1629 }; 1630 1631 if (qi.flags & PASSTHRU_FSCTL) { 1632 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1633 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1634 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1635 break; 1636 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1637 oparms.desired_access = GENERIC_ALL; 1638 break; 1639 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1640 oparms.desired_access = GENERIC_READ; 1641 break; 1642 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1643 oparms.desired_access = GENERIC_WRITE; 1644 break; 1645 } 1646 } else if (qi.flags & PASSTHRU_SET_INFO) { 1647 oparms.desired_access = GENERIC_WRITE; 1648 } else { 1649 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1650 } 1651 1652 rc = SMB2_open_init(tcon, server, 1653 &rqst[0], &oplock, &oparms, path); 1654 if (rc) 1655 goto free_output_buffer; 1656 smb2_set_next_command(tcon, &rqst[0]); 1657 1658 /* Query */ 1659 if (qi.flags & PASSTHRU_FSCTL) { 1660 /* Can eventually relax perm check since server enforces too */ 1661 if (!capable(CAP_SYS_ADMIN)) { 1662 rc = -EPERM; 1663 goto free_open_req; 1664 } 1665 rqst[1].rq_iov = &vars->io_iov[0]; 1666 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1667 1668 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1669 qi.info_type, buffer, qi.output_buffer_length, 1670 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1671 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1672 free_req1_func = SMB2_ioctl_free; 1673 } else if (qi.flags == PASSTHRU_SET_INFO) { 1674 /* Can eventually relax perm check since server enforces too */ 1675 if (!capable(CAP_SYS_ADMIN)) { 1676 rc = -EPERM; 1677 goto free_open_req; 1678 } 1679 if (qi.output_buffer_length < 8) { 1680 rc = -EINVAL; 1681 goto free_open_req; 1682 } 1683 rqst[1].rq_iov = vars->si_iov; 1684 rqst[1].rq_nvec = 1; 1685 1686 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1687 size[0] = 8; 1688 data[0] = buffer; 1689 1690 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1691 current->tgid, FILE_END_OF_FILE_INFORMATION, 1692 SMB2_O_INFO_FILE, 0, data, size); 1693 free_req1_func = SMB2_set_info_free; 1694 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1695 rqst[1].rq_iov = &vars->qi_iov; 1696 rqst[1].rq_nvec = 1; 1697 1698 rc = SMB2_query_info_init(tcon, server, 1699 &rqst[1], COMPOUND_FID, 1700 COMPOUND_FID, qi.file_info_class, 1701 qi.info_type, qi.additional_information, 1702 qi.input_buffer_length, 1703 qi.output_buffer_length, buffer); 1704 free_req1_func = SMB2_query_info_free; 1705 } else { /* unknown flags */ 1706 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1707 qi.flags); 1708 rc = -EINVAL; 1709 } 1710 1711 if (rc) 1712 goto free_open_req; 1713 smb2_set_next_command(tcon, &rqst[1]); 1714 smb2_set_related(&rqst[1]); 1715 1716 /* Close */ 1717 rqst[2].rq_iov = &vars->close_iov; 1718 rqst[2].rq_nvec = 1; 1719 1720 rc = SMB2_close_init(tcon, server, 1721 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1722 if (rc) 1723 goto free_req_1; 1724 smb2_set_related(&rqst[2]); 1725 1726 if (retries) { 1727 smb2_set_replay(server, &rqst[0]); 1728 smb2_set_replay(server, &rqst[1]); 1729 smb2_set_replay(server, &rqst[2]); 1730 } 1731 1732 rc = compound_send_recv(xid, ses, server, 1733 flags, 3, rqst, 1734 resp_buftype, rsp_iov); 1735 if (rc) 1736 goto out; 1737 1738 /* No need to bump num_remote_opens since handle immediately closed */ 1739 if (qi.flags & PASSTHRU_FSCTL) { 1740 pqi = (struct smb_query_info __user *)arg; 1741 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1742 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1743 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1744 if (qi.input_buffer_length > 0 && 1745 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1746 > rsp_iov[1].iov_len) { 1747 rc = -EFAULT; 1748 goto out; 1749 } 1750 1751 if (copy_to_user(&pqi->input_buffer_length, 1752 &qi.input_buffer_length, 1753 sizeof(qi.input_buffer_length))) { 1754 rc = -EFAULT; 1755 goto out; 1756 } 1757 1758 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1759 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1760 qi.input_buffer_length)) 1761 rc = -EFAULT; 1762 } else { 1763 pqi = (struct smb_query_info __user *)arg; 1764 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1765 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1766 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1767 if (copy_to_user(&pqi->input_buffer_length, 1768 &qi.input_buffer_length, 1769 sizeof(qi.input_buffer_length))) { 1770 rc = -EFAULT; 1771 goto out; 1772 } 1773 1774 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1775 qi.input_buffer_length)) 1776 rc = -EFAULT; 1777 } 1778 1779 out: 1780 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1781 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1782 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1783 SMB2_close_free(&rqst[2]); 1784 free_req_1: 1785 free_req1_func(&rqst[1]); 1786 free_open_req: 1787 SMB2_open_free(&rqst[0]); 1788 free_output_buffer: 1789 kfree(buffer); 1790 free_vars: 1791 kfree(vars); 1792 1793 if (is_replayable_error(rc) && 1794 smb2_should_replay(tcon, &retries, &cur_sleep)) 1795 goto replay_again; 1796 1797 return rc; 1798 } 1799 1800 static ssize_t 1801 smb2_copychunk_range(const unsigned int xid, 1802 struct cifsFileInfo *srcfile, 1803 struct cifsFileInfo *trgtfile, u64 src_off, 1804 u64 len, u64 dest_off) 1805 { 1806 int rc; 1807 unsigned int ret_data_len; 1808 struct copychunk_ioctl *pcchunk; 1809 struct copychunk_ioctl_rsp *retbuf = NULL; 1810 struct cifs_tcon *tcon; 1811 int chunks_copied = 0; 1812 bool chunk_sizes_updated = false; 1813 ssize_t bytes_written, total_bytes_written = 0; 1814 1815 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1816 if (pcchunk == NULL) 1817 return -ENOMEM; 1818 1819 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1820 /* Request a key from the server to identify the source of the copy */ 1821 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1822 srcfile->fid.persistent_fid, 1823 srcfile->fid.volatile_fid, pcchunk); 1824 1825 /* Note: request_res_key sets res_key null only if rc !=0 */ 1826 if (rc) 1827 goto cchunk_out; 1828 1829 /* For now array only one chunk long, will make more flexible later */ 1830 pcchunk->ChunkCount = cpu_to_le32(1); 1831 pcchunk->Reserved = 0; 1832 pcchunk->Reserved2 = 0; 1833 1834 tcon = tlink_tcon(trgtfile->tlink); 1835 1836 trace_smb3_copychunk_enter(xid, srcfile->fid.volatile_fid, 1837 trgtfile->fid.volatile_fid, tcon->tid, 1838 tcon->ses->Suid, src_off, dest_off, len); 1839 1840 while (len > 0) { 1841 pcchunk->SourceOffset = cpu_to_le64(src_off); 1842 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1843 pcchunk->Length = 1844 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1845 1846 /* Request server copy to target from src identified by key */ 1847 kfree(retbuf); 1848 retbuf = NULL; 1849 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1850 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1851 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1852 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1853 if (rc == 0) { 1854 if (ret_data_len != 1855 sizeof(struct copychunk_ioctl_rsp)) { 1856 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1857 rc = -EIO; 1858 goto cchunk_out; 1859 } 1860 if (retbuf->TotalBytesWritten == 0) { 1861 cifs_dbg(FYI, "no bytes copied\n"); 1862 rc = -EIO; 1863 goto cchunk_out; 1864 } 1865 /* 1866 * Check if server claimed to write more than we asked 1867 */ 1868 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1869 le32_to_cpu(pcchunk->Length)) { 1870 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1871 rc = -EIO; 1872 goto cchunk_out; 1873 } 1874 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1875 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1876 rc = -EIO; 1877 goto cchunk_out; 1878 } 1879 chunks_copied++; 1880 1881 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1882 src_off += bytes_written; 1883 dest_off += bytes_written; 1884 len -= bytes_written; 1885 total_bytes_written += bytes_written; 1886 1887 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1888 le32_to_cpu(retbuf->ChunksWritten), 1889 le32_to_cpu(retbuf->ChunkBytesWritten), 1890 bytes_written); 1891 trace_smb3_copychunk_done(xid, srcfile->fid.volatile_fid, 1892 trgtfile->fid.volatile_fid, tcon->tid, 1893 tcon->ses->Suid, src_off, dest_off, len); 1894 } else if (rc == -EINVAL) { 1895 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1896 goto cchunk_out; 1897 1898 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1899 le32_to_cpu(retbuf->ChunksWritten), 1900 le32_to_cpu(retbuf->ChunkBytesWritten), 1901 le32_to_cpu(retbuf->TotalBytesWritten)); 1902 1903 /* 1904 * Check if this is the first request using these sizes, 1905 * (ie check if copy succeed once with original sizes 1906 * and check if the server gave us different sizes after 1907 * we already updated max sizes on previous request). 1908 * if not then why is the server returning an error now 1909 */ 1910 if ((chunks_copied != 0) || chunk_sizes_updated) 1911 goto cchunk_out; 1912 1913 /* Check that server is not asking us to grow size */ 1914 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1915 tcon->max_bytes_chunk) 1916 tcon->max_bytes_chunk = 1917 le32_to_cpu(retbuf->ChunkBytesWritten); 1918 else 1919 goto cchunk_out; /* server gave us bogus size */ 1920 1921 /* No need to change MaxChunks since already set to 1 */ 1922 chunk_sizes_updated = true; 1923 } else 1924 goto cchunk_out; 1925 } 1926 1927 cchunk_out: 1928 kfree(pcchunk); 1929 kfree(retbuf); 1930 if (rc) 1931 return rc; 1932 else 1933 return total_bytes_written; 1934 } 1935 1936 static int 1937 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1938 struct cifs_fid *fid) 1939 { 1940 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1941 } 1942 1943 static unsigned int 1944 smb2_read_data_offset(char *buf) 1945 { 1946 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1947 1948 return rsp->DataOffset; 1949 } 1950 1951 static unsigned int 1952 smb2_read_data_length(char *buf, bool in_remaining) 1953 { 1954 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1955 1956 if (in_remaining) 1957 return le32_to_cpu(rsp->DataRemaining); 1958 1959 return le32_to_cpu(rsp->DataLength); 1960 } 1961 1962 1963 static int 1964 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1965 struct cifs_io_parms *parms, unsigned int *bytes_read, 1966 char **buf, int *buf_type) 1967 { 1968 parms->persistent_fid = pfid->persistent_fid; 1969 parms->volatile_fid = pfid->volatile_fid; 1970 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1971 } 1972 1973 static int 1974 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1975 struct cifs_io_parms *parms, unsigned int *written, 1976 struct kvec *iov, unsigned long nr_segs) 1977 { 1978 1979 parms->persistent_fid = pfid->persistent_fid; 1980 parms->volatile_fid = pfid->volatile_fid; 1981 return SMB2_write(xid, parms, written, iov, nr_segs); 1982 } 1983 1984 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1985 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1986 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1987 { 1988 struct cifsInodeInfo *cifsi; 1989 int rc; 1990 1991 cifsi = CIFS_I(inode); 1992 1993 /* if file already sparse don't bother setting sparse again */ 1994 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1995 return true; /* already sparse */ 1996 1997 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1998 return true; /* already not sparse */ 1999 2000 /* 2001 * Can't check for sparse support on share the usual way via the 2002 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 2003 * since Samba server doesn't set the flag on the share, yet 2004 * supports the set sparse FSCTL and returns sparse correctly 2005 * in the file attributes. If we fail setting sparse though we 2006 * mark that server does not support sparse files for this share 2007 * to avoid repeatedly sending the unsupported fsctl to server 2008 * if the file is repeatedly extended. 2009 */ 2010 if (tcon->broken_sparse_sup) 2011 return false; 2012 2013 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2014 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 2015 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 2016 if (rc) { 2017 tcon->broken_sparse_sup = true; 2018 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 2019 return false; 2020 } 2021 2022 if (setsparse) 2023 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 2024 else 2025 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 2026 2027 return true; 2028 } 2029 2030 static int 2031 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 2032 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 2033 { 2034 struct inode *inode; 2035 2036 /* 2037 * If extending file more than one page make sparse. Many Linux fs 2038 * make files sparse by default when extending via ftruncate 2039 */ 2040 inode = d_inode(cfile->dentry); 2041 2042 if (!set_alloc && (size > inode->i_size + 8192)) { 2043 __u8 set_sparse = 1; 2044 2045 /* whether set sparse succeeds or not, extend the file */ 2046 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 2047 } 2048 2049 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 2050 cfile->fid.volatile_fid, cfile->pid, size); 2051 } 2052 2053 static int 2054 smb2_duplicate_extents(const unsigned int xid, 2055 struct cifsFileInfo *srcfile, 2056 struct cifsFileInfo *trgtfile, u64 src_off, 2057 u64 len, u64 dest_off) 2058 { 2059 int rc; 2060 unsigned int ret_data_len; 2061 struct inode *inode; 2062 struct duplicate_extents_to_file dup_ext_buf; 2063 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2064 2065 /* server fileays advertise duplicate extent support with this flag */ 2066 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2067 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2068 return -EOPNOTSUPP; 2069 2070 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2071 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2072 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2073 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2074 dup_ext_buf.ByteCount = cpu_to_le64(len); 2075 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2076 src_off, dest_off, len); 2077 trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid, 2078 trgtfile->fid.volatile_fid, tcon->tid, 2079 tcon->ses->Suid, src_off, dest_off, len); 2080 inode = d_inode(trgtfile->dentry); 2081 if (inode->i_size < dest_off + len) { 2082 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2083 if (rc) 2084 goto duplicate_extents_out; 2085 2086 /* 2087 * Although also could set plausible allocation size (i_blocks) 2088 * here in addition to setting the file size, in reflink 2089 * it is likely that the target file is sparse. Its allocation 2090 * size will be queried on next revalidate, but it is important 2091 * to make sure that file's cached size is updated immediately 2092 */ 2093 netfs_resize_file(netfs_inode(inode), dest_off + len, true); 2094 cifs_setsize(inode, dest_off + len); 2095 } 2096 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2097 trgtfile->fid.volatile_fid, 2098 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2099 (char *)&dup_ext_buf, 2100 sizeof(struct duplicate_extents_to_file), 2101 CIFSMaxBufSize, NULL, 2102 &ret_data_len); 2103 2104 if (ret_data_len > 0) 2105 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2106 2107 duplicate_extents_out: 2108 if (rc) 2109 trace_smb3_clone_err(xid, srcfile->fid.volatile_fid, 2110 trgtfile->fid.volatile_fid, 2111 tcon->tid, tcon->ses->Suid, src_off, 2112 dest_off, len, rc); 2113 else 2114 trace_smb3_clone_done(xid, srcfile->fid.volatile_fid, 2115 trgtfile->fid.volatile_fid, tcon->tid, 2116 tcon->ses->Suid, src_off, dest_off, len); 2117 return rc; 2118 } 2119 2120 static int 2121 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2122 struct cifsFileInfo *cfile) 2123 { 2124 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2125 cfile->fid.volatile_fid); 2126 } 2127 2128 static int 2129 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2130 struct cifsFileInfo *cfile) 2131 { 2132 struct fsctl_set_integrity_information_req integr_info; 2133 unsigned int ret_data_len; 2134 2135 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2136 integr_info.Flags = 0; 2137 integr_info.Reserved = 0; 2138 2139 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2140 cfile->fid.volatile_fid, 2141 FSCTL_SET_INTEGRITY_INFORMATION, 2142 (char *)&integr_info, 2143 sizeof(struct fsctl_set_integrity_information_req), 2144 CIFSMaxBufSize, NULL, 2145 &ret_data_len); 2146 2147 } 2148 2149 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2150 #define GMT_TOKEN_SIZE 50 2151 2152 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2153 2154 /* 2155 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2156 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2157 */ 2158 static int 2159 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2160 struct cifsFileInfo *cfile, void __user *ioc_buf) 2161 { 2162 char *retbuf = NULL; 2163 unsigned int ret_data_len = 0; 2164 int rc; 2165 u32 max_response_size; 2166 struct smb_snapshot_array snapshot_in; 2167 2168 /* 2169 * On the first query to enumerate the list of snapshots available 2170 * for this volume the buffer begins with 0 (number of snapshots 2171 * which can be returned is zero since at that point we do not know 2172 * how big the buffer needs to be). On the second query, 2173 * it (ret_data_len) is set to number of snapshots so we can 2174 * know to set the maximum response size larger (see below). 2175 */ 2176 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2177 return -EFAULT; 2178 2179 /* 2180 * Note that for snapshot queries that servers like Azure expect that 2181 * the first query be minimal size (and just used to get the number/size 2182 * of previous versions) so response size must be specified as EXACTLY 2183 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2184 * of eight bytes. 2185 */ 2186 if (ret_data_len == 0) 2187 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2188 else 2189 max_response_size = CIFSMaxBufSize; 2190 2191 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2192 cfile->fid.volatile_fid, 2193 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2194 NULL, 0 /* no input data */, max_response_size, 2195 (char **)&retbuf, 2196 &ret_data_len); 2197 cifs_dbg(FYI, "enum snapshots ioctl returned %d and ret buflen is %d\n", 2198 rc, ret_data_len); 2199 if (rc) 2200 return rc; 2201 2202 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2203 /* Fixup buffer */ 2204 if (copy_from_user(&snapshot_in, ioc_buf, 2205 sizeof(struct smb_snapshot_array))) { 2206 rc = -EFAULT; 2207 kfree(retbuf); 2208 return rc; 2209 } 2210 2211 /* 2212 * Check for min size, ie not large enough to fit even one GMT 2213 * token (snapshot). On the first ioctl some users may pass in 2214 * smaller size (or zero) to simply get the size of the array 2215 * so the user space caller can allocate sufficient memory 2216 * and retry the ioctl again with larger array size sufficient 2217 * to hold all of the snapshot GMT tokens on the second try. 2218 */ 2219 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2220 ret_data_len = sizeof(struct smb_snapshot_array); 2221 2222 /* 2223 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2224 * the snapshot array (of 50 byte GMT tokens) each 2225 * representing an available previous version of the data 2226 */ 2227 if (ret_data_len > (snapshot_in.snapshot_array_size + 2228 sizeof(struct smb_snapshot_array))) 2229 ret_data_len = snapshot_in.snapshot_array_size + 2230 sizeof(struct smb_snapshot_array); 2231 2232 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2233 rc = -EFAULT; 2234 } 2235 2236 kfree(retbuf); 2237 return rc; 2238 } 2239 2240 2241 2242 static int 2243 smb3_notify(const unsigned int xid, struct file *pfile, 2244 void __user *ioc_buf, bool return_changes) 2245 { 2246 struct smb3_notify_info notify; 2247 struct smb3_notify_info __user *pnotify_buf; 2248 struct dentry *dentry = pfile->f_path.dentry; 2249 struct inode *inode = file_inode(pfile); 2250 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2251 struct cifs_open_parms oparms; 2252 struct cifs_fid fid; 2253 struct cifs_tcon *tcon; 2254 const unsigned char *path; 2255 char *returned_ioctl_info = NULL; 2256 void *page = alloc_dentry_path(); 2257 __le16 *utf16_path = NULL; 2258 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2259 int rc = 0; 2260 __u32 ret_len = 0; 2261 2262 path = build_path_from_dentry(dentry, page); 2263 if (IS_ERR(path)) { 2264 rc = PTR_ERR(path); 2265 goto notify_exit; 2266 } 2267 2268 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2269 if (utf16_path == NULL) { 2270 rc = -ENOMEM; 2271 goto notify_exit; 2272 } 2273 2274 if (return_changes) { 2275 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2276 rc = -EFAULT; 2277 goto notify_exit; 2278 } 2279 } else { 2280 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2281 rc = -EFAULT; 2282 goto notify_exit; 2283 } 2284 notify.data_len = 0; 2285 } 2286 2287 tcon = cifs_sb_master_tcon(cifs_sb); 2288 oparms = (struct cifs_open_parms) { 2289 .tcon = tcon, 2290 .path = path, 2291 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2292 .disposition = FILE_OPEN, 2293 .create_options = cifs_create_options(cifs_sb, 0), 2294 .fid = &fid, 2295 }; 2296 2297 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2298 NULL); 2299 if (rc) 2300 goto notify_exit; 2301 2302 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2303 notify.watch_tree, notify.completion_filter, 2304 notify.data_len, &returned_ioctl_info, &ret_len); 2305 2306 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2307 2308 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2309 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2310 if (ret_len > notify.data_len) 2311 ret_len = notify.data_len; 2312 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2313 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2314 rc = -EFAULT; 2315 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2316 rc = -EFAULT; 2317 } 2318 kfree(returned_ioctl_info); 2319 notify_exit: 2320 free_dentry_path(page); 2321 kfree(utf16_path); 2322 return rc; 2323 } 2324 2325 static int 2326 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2327 const char *path, struct cifs_sb_info *cifs_sb, 2328 struct cifs_fid *fid, __u16 search_flags, 2329 struct cifs_search_info *srch_inf) 2330 { 2331 __le16 *utf16_path; 2332 struct smb_rqst rqst[2]; 2333 struct kvec rsp_iov[2]; 2334 int resp_buftype[2]; 2335 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2336 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2337 int rc, flags = 0; 2338 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2339 struct cifs_open_parms oparms; 2340 struct smb2_query_directory_rsp *qd_rsp = NULL; 2341 struct smb2_create_rsp *op_rsp = NULL; 2342 struct TCP_Server_Info *server; 2343 int retries = 0, cur_sleep = 1; 2344 2345 replay_again: 2346 /* reinitialize for possible replay */ 2347 flags = 0; 2348 oplock = SMB2_OPLOCK_LEVEL_NONE; 2349 server = cifs_pick_channel(tcon->ses); 2350 2351 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2352 if (!utf16_path) 2353 return -ENOMEM; 2354 2355 if (smb3_encryption_required(tcon)) 2356 flags |= CIFS_TRANSFORM_REQ; 2357 2358 memset(rqst, 0, sizeof(rqst)); 2359 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2360 memset(rsp_iov, 0, sizeof(rsp_iov)); 2361 2362 /* Open */ 2363 memset(&open_iov, 0, sizeof(open_iov)); 2364 rqst[0].rq_iov = open_iov; 2365 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2366 2367 oparms = (struct cifs_open_parms) { 2368 .tcon = tcon, 2369 .path = path, 2370 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2371 .disposition = FILE_OPEN, 2372 .create_options = cifs_create_options(cifs_sb, 0), 2373 .fid = fid, 2374 .replay = !!(retries), 2375 }; 2376 2377 rc = SMB2_open_init(tcon, server, 2378 &rqst[0], &oplock, &oparms, utf16_path); 2379 if (rc) 2380 goto qdf_free; 2381 smb2_set_next_command(tcon, &rqst[0]); 2382 2383 /* Query directory */ 2384 srch_inf->entries_in_buffer = 0; 2385 srch_inf->index_of_last_entry = 2; 2386 2387 memset(&qd_iov, 0, sizeof(qd_iov)); 2388 rqst[1].rq_iov = qd_iov; 2389 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2390 2391 rc = SMB2_query_directory_init(xid, tcon, server, 2392 &rqst[1], 2393 COMPOUND_FID, COMPOUND_FID, 2394 0, srch_inf->info_level); 2395 if (rc) 2396 goto qdf_free; 2397 2398 smb2_set_related(&rqst[1]); 2399 2400 if (retries) { 2401 smb2_set_replay(server, &rqst[0]); 2402 smb2_set_replay(server, &rqst[1]); 2403 } 2404 2405 rc = compound_send_recv(xid, tcon->ses, server, 2406 flags, 2, rqst, 2407 resp_buftype, rsp_iov); 2408 2409 /* If the open failed there is nothing to do */ 2410 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2411 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2412 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2413 goto qdf_free; 2414 } 2415 fid->persistent_fid = op_rsp->PersistentFileId; 2416 fid->volatile_fid = op_rsp->VolatileFileId; 2417 2418 /* Anything else than ENODATA means a genuine error */ 2419 if (rc && rc != -ENODATA) { 2420 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2421 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2422 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2423 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2424 goto qdf_free; 2425 } 2426 2427 atomic_inc(&tcon->num_remote_opens); 2428 2429 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2430 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2431 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2432 tcon->tid, tcon->ses->Suid, 0, 0); 2433 srch_inf->endOfSearch = true; 2434 rc = 0; 2435 goto qdf_free; 2436 } 2437 2438 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2439 srch_inf); 2440 if (rc) { 2441 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2442 tcon->ses->Suid, 0, 0, rc); 2443 goto qdf_free; 2444 } 2445 resp_buftype[1] = CIFS_NO_BUFFER; 2446 2447 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2448 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2449 2450 qdf_free: 2451 kfree(utf16_path); 2452 SMB2_open_free(&rqst[0]); 2453 SMB2_query_directory_free(&rqst[1]); 2454 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2455 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2456 2457 if (is_replayable_error(rc) && 2458 smb2_should_replay(tcon, &retries, &cur_sleep)) 2459 goto replay_again; 2460 2461 return rc; 2462 } 2463 2464 static int 2465 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2466 struct cifs_fid *fid, __u16 search_flags, 2467 struct cifs_search_info *srch_inf) 2468 { 2469 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2470 fid->volatile_fid, 0, srch_inf); 2471 } 2472 2473 static int 2474 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2475 struct cifs_fid *fid) 2476 { 2477 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2478 } 2479 2480 /* 2481 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2482 * the number of credits and return true. Otherwise - return false. 2483 */ 2484 static bool 2485 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2486 { 2487 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2488 int scredits, in_flight; 2489 2490 if (shdr->Status != STATUS_PENDING) 2491 return false; 2492 2493 if (shdr->CreditRequest) { 2494 spin_lock(&server->req_lock); 2495 server->credits += le16_to_cpu(shdr->CreditRequest); 2496 scredits = server->credits; 2497 in_flight = server->in_flight; 2498 spin_unlock(&server->req_lock); 2499 wake_up(&server->request_q); 2500 2501 trace_smb3_pend_credits(server->CurrentMid, 2502 server->conn_id, server->hostname, scredits, 2503 le16_to_cpu(shdr->CreditRequest), in_flight); 2504 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2505 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2506 } 2507 2508 return true; 2509 } 2510 2511 static bool 2512 smb2_is_session_expired(char *buf) 2513 { 2514 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2515 2516 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2517 shdr->Status != STATUS_USER_SESSION_DELETED) 2518 return false; 2519 2520 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2521 le64_to_cpu(shdr->SessionId), 2522 le16_to_cpu(shdr->Command), 2523 le64_to_cpu(shdr->MessageId)); 2524 cifs_dbg(FYI, "Session expired or deleted\n"); 2525 2526 return true; 2527 } 2528 2529 static bool 2530 smb2_is_status_io_timeout(char *buf) 2531 { 2532 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2533 2534 if (shdr->Status == STATUS_IO_TIMEOUT) 2535 return true; 2536 else 2537 return false; 2538 } 2539 2540 static bool 2541 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2542 { 2543 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2544 struct TCP_Server_Info *pserver; 2545 struct cifs_ses *ses; 2546 struct cifs_tcon *tcon; 2547 2548 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2549 return false; 2550 2551 /* If server is a channel, select the primary channel */ 2552 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2553 2554 spin_lock(&cifs_tcp_ses_lock); 2555 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2556 if (cifs_ses_exiting(ses)) 2557 continue; 2558 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2559 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2560 spin_lock(&tcon->tc_lock); 2561 tcon->need_reconnect = true; 2562 spin_unlock(&tcon->tc_lock); 2563 spin_unlock(&cifs_tcp_ses_lock); 2564 pr_warn_once("Server share %s deleted.\n", 2565 tcon->tree_name); 2566 return true; 2567 } 2568 } 2569 } 2570 spin_unlock(&cifs_tcp_ses_lock); 2571 2572 return false; 2573 } 2574 2575 static int 2576 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2577 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2578 { 2579 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2580 return SMB2_lease_break(0, tcon, cinode->lease_key, 2581 smb2_get_lease_state(cinode)); 2582 2583 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2584 CIFS_CACHE_READ(cinode) ? 1 : 0); 2585 } 2586 2587 void 2588 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2589 { 2590 struct smb2_hdr *shdr; 2591 2592 if (server->dialect < SMB30_PROT_ID) 2593 return; 2594 2595 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2596 if (shdr == NULL) { 2597 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2598 return; 2599 } 2600 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2601 } 2602 2603 void 2604 smb2_set_related(struct smb_rqst *rqst) 2605 { 2606 struct smb2_hdr *shdr; 2607 2608 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2609 if (shdr == NULL) { 2610 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2611 return; 2612 } 2613 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2614 } 2615 2616 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2617 2618 void 2619 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2620 { 2621 struct smb2_hdr *shdr; 2622 struct cifs_ses *ses = tcon->ses; 2623 struct TCP_Server_Info *server = ses->server; 2624 unsigned long len = smb_rqst_len(server, rqst); 2625 int num_padding; 2626 2627 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2628 if (shdr == NULL) { 2629 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2630 return; 2631 } 2632 2633 /* SMB headers in a compound are 8 byte aligned. */ 2634 if (!IS_ALIGNED(len, 8)) { 2635 num_padding = 8 - (len & 7); 2636 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2637 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2638 rqst->rq_nvec++; 2639 len += num_padding; 2640 } 2641 shdr->NextCommand = cpu_to_le32(len); 2642 } 2643 2644 /* 2645 * helper function for exponential backoff and check if replayable 2646 */ 2647 bool smb2_should_replay(struct cifs_tcon *tcon, 2648 int *pretries, 2649 int *pcur_sleep) 2650 { 2651 if (!pretries || !pcur_sleep) 2652 return false; 2653 2654 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2655 msleep(*pcur_sleep); 2656 (*pcur_sleep) = ((*pcur_sleep) << 1); 2657 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2658 (*pcur_sleep) = CIFS_MAX_SLEEP; 2659 return true; 2660 } 2661 2662 return false; 2663 } 2664 2665 /* 2666 * Passes the query info response back to the caller on success. 2667 * Caller need to free this with free_rsp_buf(). 2668 */ 2669 int 2670 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2671 const char *path, u32 desired_access, 2672 u32 class, u32 type, u32 output_len, 2673 struct kvec *rsp, int *buftype, 2674 struct cifs_sb_info *cifs_sb) 2675 { 2676 struct smb2_compound_vars *vars; 2677 struct cifs_ses *ses = tcon->ses; 2678 struct TCP_Server_Info *server; 2679 int flags = CIFS_CP_CREATE_CLOSE_OP; 2680 struct smb_rqst *rqst; 2681 int resp_buftype[3]; 2682 struct kvec *rsp_iov; 2683 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2684 struct cifs_open_parms oparms; 2685 struct cifs_fid fid; 2686 int rc; 2687 __le16 *utf16_path; 2688 struct cached_fid *cfid = NULL; 2689 int retries = 0, cur_sleep = 1; 2690 2691 replay_again: 2692 /* reinitialize for possible replay */ 2693 flags = CIFS_CP_CREATE_CLOSE_OP; 2694 oplock = SMB2_OPLOCK_LEVEL_NONE; 2695 server = cifs_pick_channel(ses); 2696 2697 if (!path) 2698 path = ""; 2699 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2700 if (!utf16_path) 2701 return -ENOMEM; 2702 2703 if (smb3_encryption_required(tcon)) 2704 flags |= CIFS_TRANSFORM_REQ; 2705 2706 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2707 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2708 if (!vars) { 2709 rc = -ENOMEM; 2710 goto out_free_path; 2711 } 2712 rqst = vars->rqst; 2713 rsp_iov = vars->rsp_iov; 2714 2715 /* 2716 * We can only call this for things we know are directories. 2717 */ 2718 if (!strcmp(path, "")) 2719 open_cached_dir(xid, tcon, path, cifs_sb, false, 2720 &cfid); /* cfid null if open dir failed */ 2721 2722 rqst[0].rq_iov = vars->open_iov; 2723 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2724 2725 oparms = (struct cifs_open_parms) { 2726 .tcon = tcon, 2727 .path = path, 2728 .desired_access = desired_access, 2729 .disposition = FILE_OPEN, 2730 .create_options = cifs_create_options(cifs_sb, 0), 2731 .fid = &fid, 2732 .replay = !!(retries), 2733 }; 2734 2735 rc = SMB2_open_init(tcon, server, 2736 &rqst[0], &oplock, &oparms, utf16_path); 2737 if (rc) 2738 goto qic_exit; 2739 smb2_set_next_command(tcon, &rqst[0]); 2740 2741 rqst[1].rq_iov = &vars->qi_iov; 2742 rqst[1].rq_nvec = 1; 2743 2744 if (cfid) { 2745 rc = SMB2_query_info_init(tcon, server, 2746 &rqst[1], 2747 cfid->fid.persistent_fid, 2748 cfid->fid.volatile_fid, 2749 class, type, 0, 2750 output_len, 0, 2751 NULL); 2752 } else { 2753 rc = SMB2_query_info_init(tcon, server, 2754 &rqst[1], 2755 COMPOUND_FID, 2756 COMPOUND_FID, 2757 class, type, 0, 2758 output_len, 0, 2759 NULL); 2760 } 2761 if (rc) 2762 goto qic_exit; 2763 if (!cfid) { 2764 smb2_set_next_command(tcon, &rqst[1]); 2765 smb2_set_related(&rqst[1]); 2766 } 2767 2768 rqst[2].rq_iov = &vars->close_iov; 2769 rqst[2].rq_nvec = 1; 2770 2771 rc = SMB2_close_init(tcon, server, 2772 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2773 if (rc) 2774 goto qic_exit; 2775 smb2_set_related(&rqst[2]); 2776 2777 if (retries) { 2778 if (!cfid) { 2779 smb2_set_replay(server, &rqst[0]); 2780 smb2_set_replay(server, &rqst[2]); 2781 } 2782 smb2_set_replay(server, &rqst[1]); 2783 } 2784 2785 if (cfid) { 2786 rc = compound_send_recv(xid, ses, server, 2787 flags, 1, &rqst[1], 2788 &resp_buftype[1], &rsp_iov[1]); 2789 } else { 2790 rc = compound_send_recv(xid, ses, server, 2791 flags, 3, rqst, 2792 resp_buftype, rsp_iov); 2793 } 2794 if (rc) { 2795 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2796 if (rc == -EREMCHG) { 2797 tcon->need_reconnect = true; 2798 pr_warn_once("server share %s deleted\n", 2799 tcon->tree_name); 2800 } 2801 goto qic_exit; 2802 } 2803 *rsp = rsp_iov[1]; 2804 *buftype = resp_buftype[1]; 2805 2806 qic_exit: 2807 SMB2_open_free(&rqst[0]); 2808 SMB2_query_info_free(&rqst[1]); 2809 SMB2_close_free(&rqst[2]); 2810 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2811 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2812 if (cfid) 2813 close_cached_dir(cfid); 2814 kfree(vars); 2815 out_free_path: 2816 kfree(utf16_path); 2817 2818 if (is_replayable_error(rc) && 2819 smb2_should_replay(tcon, &retries, &cur_sleep)) 2820 goto replay_again; 2821 2822 return rc; 2823 } 2824 2825 static int 2826 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2827 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2828 { 2829 struct smb2_query_info_rsp *rsp; 2830 struct smb2_fs_full_size_info *info = NULL; 2831 struct kvec rsp_iov = {NULL, 0}; 2832 int buftype = CIFS_NO_BUFFER; 2833 int rc; 2834 2835 2836 rc = smb2_query_info_compound(xid, tcon, path, 2837 FILE_READ_ATTRIBUTES, 2838 FS_FULL_SIZE_INFORMATION, 2839 SMB2_O_INFO_FILESYSTEM, 2840 sizeof(struct smb2_fs_full_size_info), 2841 &rsp_iov, &buftype, cifs_sb); 2842 if (rc) 2843 goto qfs_exit; 2844 2845 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2846 buf->f_type = SMB2_SUPER_MAGIC; 2847 info = (struct smb2_fs_full_size_info *)( 2848 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2849 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2850 le32_to_cpu(rsp->OutputBufferLength), 2851 &rsp_iov, 2852 sizeof(struct smb2_fs_full_size_info)); 2853 if (!rc) 2854 smb2_copy_fs_info_to_kstatfs(info, buf); 2855 2856 qfs_exit: 2857 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2858 free_rsp_buf(buftype, rsp_iov.iov_base); 2859 return rc; 2860 } 2861 2862 static int 2863 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2864 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2865 { 2866 int rc; 2867 __le16 *utf16_path = NULL; 2868 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2869 struct cifs_open_parms oparms; 2870 struct cifs_fid fid; 2871 2872 if (!tcon->posix_extensions) 2873 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2874 2875 oparms = (struct cifs_open_parms) { 2876 .tcon = tcon, 2877 .path = path, 2878 .desired_access = FILE_READ_ATTRIBUTES, 2879 .disposition = FILE_OPEN, 2880 .create_options = cifs_create_options(cifs_sb, 0), 2881 .fid = &fid, 2882 }; 2883 2884 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2885 if (utf16_path == NULL) 2886 return -ENOMEM; 2887 2888 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 2889 NULL, NULL); 2890 kfree(utf16_path); 2891 if (rc) 2892 return rc; 2893 2894 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2895 fid.volatile_fid, buf); 2896 buf->f_type = SMB2_SUPER_MAGIC; 2897 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2898 return rc; 2899 } 2900 2901 static bool 2902 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2903 { 2904 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2905 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2906 } 2907 2908 static int 2909 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2910 __u64 length, __u32 type, int lock, int unlock, bool wait) 2911 { 2912 if (unlock && !lock) 2913 type = SMB2_LOCKFLAG_UNLOCK; 2914 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2915 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2916 current->tgid, length, offset, type, wait); 2917 } 2918 2919 static void 2920 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2921 { 2922 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2923 } 2924 2925 static void 2926 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2927 { 2928 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2929 } 2930 2931 static void 2932 smb2_new_lease_key(struct cifs_fid *fid) 2933 { 2934 generate_random_uuid(fid->lease_key); 2935 } 2936 2937 static int 2938 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2939 const char *search_name, 2940 struct dfs_info3_param **target_nodes, 2941 unsigned int *num_of_nodes, 2942 const struct nls_table *nls_codepage, int remap) 2943 { 2944 int rc; 2945 __le16 *utf16_path = NULL; 2946 int utf16_path_len = 0; 2947 struct cifs_tcon *tcon; 2948 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2949 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2950 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2951 int retry_once = 0; 2952 2953 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2954 2955 /* 2956 * Try to use the IPC tcon, otherwise just use any 2957 */ 2958 tcon = ses->tcon_ipc; 2959 if (tcon == NULL) { 2960 spin_lock(&cifs_tcp_ses_lock); 2961 tcon = list_first_entry_or_null(&ses->tcon_list, 2962 struct cifs_tcon, 2963 tcon_list); 2964 if (tcon) { 2965 tcon->tc_count++; 2966 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2967 netfs_trace_tcon_ref_get_dfs_refer); 2968 } 2969 spin_unlock(&cifs_tcp_ses_lock); 2970 } 2971 2972 if (tcon == NULL) { 2973 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2974 ses); 2975 rc = -ENOTCONN; 2976 goto out; 2977 } 2978 2979 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2980 &utf16_path_len, 2981 nls_codepage, remap); 2982 if (!utf16_path) { 2983 rc = -ENOMEM; 2984 goto out; 2985 } 2986 2987 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2988 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2989 if (!dfs_req) { 2990 rc = -ENOMEM; 2991 goto out; 2992 } 2993 2994 /* Highest DFS referral version understood */ 2995 dfs_req->MaxReferralLevel = DFS_VERSION; 2996 2997 /* Path to resolve in an UTF-16 null-terminated string */ 2998 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2999 3000 for (;;) { 3001 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 3002 FSCTL_DFS_GET_REFERRALS, 3003 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 3004 (char **)&dfs_rsp, &dfs_rsp_size); 3005 if (fatal_signal_pending(current)) { 3006 rc = -EINTR; 3007 break; 3008 } 3009 if (!is_retryable_error(rc) || retry_once++) 3010 break; 3011 usleep_range(512, 2048); 3012 } 3013 3014 if (!rc && !dfs_rsp) 3015 rc = -EIO; 3016 if (rc) { 3017 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 3018 cifs_tcon_dbg(FYI, "%s: ioctl error: rc=%d\n", __func__, rc); 3019 goto out; 3020 } 3021 3022 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 3023 num_of_nodes, target_nodes, 3024 nls_codepage, remap, search_name, 3025 true /* is_unicode */); 3026 if (rc && rc != -ENOENT) { 3027 cifs_tcon_dbg(VFS, "%s: failed to parse DFS referral %s: %d\n", 3028 __func__, search_name, rc); 3029 } 3030 3031 out: 3032 if (tcon && !tcon->ipc) { 3033 /* ipc tcons are not refcounted */ 3034 spin_lock(&cifs_tcp_ses_lock); 3035 tcon->tc_count--; 3036 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3037 netfs_trace_tcon_ref_dec_dfs_refer); 3038 /* tc_count can never go negative */ 3039 WARN_ON(tcon->tc_count < 0); 3040 spin_unlock(&cifs_tcp_ses_lock); 3041 } 3042 kfree(utf16_path); 3043 kfree(dfs_req); 3044 kfree(dfs_rsp); 3045 return rc; 3046 } 3047 3048 static struct smb_ntsd * 3049 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3050 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3051 { 3052 struct smb_ntsd *pntsd = NULL; 3053 unsigned int xid; 3054 int rc = -EOPNOTSUPP; 3055 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3056 3057 if (IS_ERR(tlink)) 3058 return ERR_CAST(tlink); 3059 3060 xid = get_xid(); 3061 cifs_dbg(FYI, "trying to get acl\n"); 3062 3063 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3064 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3065 info); 3066 free_xid(xid); 3067 3068 cifs_put_tlink(tlink); 3069 3070 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3071 if (rc) 3072 return ERR_PTR(rc); 3073 return pntsd; 3074 3075 } 3076 3077 static struct smb_ntsd * 3078 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3079 const char *path, u32 *pacllen, u32 info) 3080 { 3081 struct smb_ntsd *pntsd = NULL; 3082 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3083 unsigned int xid; 3084 int rc; 3085 struct cifs_tcon *tcon; 3086 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3087 struct cifs_fid fid; 3088 struct cifs_open_parms oparms; 3089 __le16 *utf16_path; 3090 3091 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3092 if (IS_ERR(tlink)) 3093 return ERR_CAST(tlink); 3094 3095 tcon = tlink_tcon(tlink); 3096 xid = get_xid(); 3097 3098 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3099 if (!utf16_path) { 3100 rc = -ENOMEM; 3101 free_xid(xid); 3102 return ERR_PTR(rc); 3103 } 3104 3105 oparms = (struct cifs_open_parms) { 3106 .tcon = tcon, 3107 .path = path, 3108 .desired_access = READ_CONTROL, 3109 .disposition = FILE_OPEN, 3110 /* 3111 * When querying an ACL, even if the file is a symlink 3112 * we want to open the source not the target, and so 3113 * the protocol requires that the client specify this 3114 * flag when opening a reparse point 3115 */ 3116 .create_options = cifs_create_options(cifs_sb, 0) | 3117 OPEN_REPARSE_POINT, 3118 .fid = &fid, 3119 }; 3120 3121 if (info & SACL_SECINFO) 3122 oparms.desired_access |= SYSTEM_SECURITY; 3123 3124 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3125 NULL); 3126 kfree(utf16_path); 3127 if (!rc) { 3128 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3129 fid.volatile_fid, (void **)&pntsd, pacllen, 3130 info); 3131 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3132 } 3133 3134 cifs_put_tlink(tlink); 3135 free_xid(xid); 3136 3137 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3138 if (rc) 3139 return ERR_PTR(rc); 3140 return pntsd; 3141 } 3142 3143 static int 3144 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, 3145 struct inode *inode, const char *path, int aclflag) 3146 { 3147 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3148 unsigned int xid; 3149 int rc, access_flags = 0; 3150 struct cifs_tcon *tcon; 3151 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3152 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3153 struct cifs_fid fid; 3154 struct cifs_open_parms oparms; 3155 __le16 *utf16_path; 3156 3157 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3158 if (IS_ERR(tlink)) 3159 return PTR_ERR(tlink); 3160 3161 tcon = tlink_tcon(tlink); 3162 xid = get_xid(); 3163 3164 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3165 access_flags |= WRITE_OWNER; 3166 if (aclflag & CIFS_ACL_SACL) 3167 access_flags |= SYSTEM_SECURITY; 3168 if (aclflag & CIFS_ACL_DACL) 3169 access_flags |= WRITE_DAC; 3170 3171 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3172 if (!utf16_path) { 3173 rc = -ENOMEM; 3174 free_xid(xid); 3175 return rc; 3176 } 3177 3178 oparms = (struct cifs_open_parms) { 3179 .tcon = tcon, 3180 .desired_access = access_flags, 3181 .create_options = cifs_create_options(cifs_sb, 0), 3182 .disposition = FILE_OPEN, 3183 .path = path, 3184 .fid = &fid, 3185 }; 3186 3187 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3188 NULL, NULL); 3189 kfree(utf16_path); 3190 if (!rc) { 3191 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3192 fid.volatile_fid, pnntsd, acllen, aclflag); 3193 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3194 } 3195 3196 cifs_put_tlink(tlink); 3197 free_xid(xid); 3198 return rc; 3199 } 3200 3201 /* Retrieve an ACL from the server */ 3202 static struct smb_ntsd * 3203 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3204 struct inode *inode, const char *path, 3205 u32 *pacllen, u32 info) 3206 { 3207 struct smb_ntsd *pntsd = NULL; 3208 struct cifsFileInfo *open_file = NULL; 3209 3210 if (inode && !(info & SACL_SECINFO)) 3211 open_file = find_readable_file(CIFS_I(inode), true); 3212 if (!open_file || (info & SACL_SECINFO)) 3213 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3214 3215 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3216 cifsFileInfo_put(open_file); 3217 return pntsd; 3218 } 3219 3220 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3221 loff_t offset, loff_t len, unsigned int xid) 3222 { 3223 struct cifsFileInfo *cfile = file->private_data; 3224 struct file_zero_data_information fsctl_buf; 3225 3226 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3227 3228 fsctl_buf.FileOffset = cpu_to_le64(offset); 3229 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3230 3231 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3232 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3233 (char *)&fsctl_buf, 3234 sizeof(struct file_zero_data_information), 3235 0, NULL, NULL); 3236 } 3237 3238 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3239 unsigned long long offset, unsigned long long len, 3240 bool keep_size) 3241 { 3242 struct cifs_ses *ses = tcon->ses; 3243 struct inode *inode = file_inode(file); 3244 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3245 struct cifsFileInfo *cfile = file->private_data; 3246 struct netfs_inode *ictx = netfs_inode(inode); 3247 unsigned long long i_size, new_size, remote_size; 3248 long rc; 3249 unsigned int xid; 3250 3251 xid = get_xid(); 3252 3253 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3254 ses->Suid, offset, len); 3255 3256 inode_lock(inode); 3257 filemap_invalidate_lock(inode->i_mapping); 3258 3259 i_size = i_size_read(inode); 3260 remote_size = ictx->remote_i_size; 3261 if (offset + len >= remote_size && offset < i_size) { 3262 unsigned long long top = umin(offset + len, i_size); 3263 3264 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3265 if (rc < 0) 3266 goto zero_range_exit; 3267 } 3268 3269 /* 3270 * We zero the range through ioctl, so we need remove the page caches 3271 * first, otherwise the data may be inconsistent with the server. 3272 */ 3273 truncate_pagecache_range(inode, offset, offset + len - 1); 3274 3275 /* if file not oplocked can't be sure whether asking to extend size */ 3276 rc = -EOPNOTSUPP; 3277 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3278 goto zero_range_exit; 3279 3280 rc = smb3_zero_data(file, tcon, offset, len, xid); 3281 if (rc < 0) 3282 goto zero_range_exit; 3283 3284 /* 3285 * do we also need to change the size of the file? 3286 */ 3287 new_size = offset + len; 3288 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3289 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3290 cfile->fid.volatile_fid, cfile->pid, new_size); 3291 if (rc >= 0) { 3292 truncate_setsize(inode, new_size); 3293 netfs_resize_file(&cifsi->netfs, new_size, true); 3294 if (offset < cifsi->netfs.zero_point) 3295 cifsi->netfs.zero_point = offset; 3296 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3297 } 3298 } 3299 3300 zero_range_exit: 3301 filemap_invalidate_unlock(inode->i_mapping); 3302 inode_unlock(inode); 3303 free_xid(xid); 3304 if (rc) 3305 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3306 ses->Suid, offset, len, rc); 3307 else 3308 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3309 ses->Suid, offset, len); 3310 return rc; 3311 } 3312 3313 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3314 loff_t offset, loff_t len) 3315 { 3316 struct inode *inode = file_inode(file); 3317 struct cifsFileInfo *cfile = file->private_data; 3318 struct file_zero_data_information fsctl_buf; 3319 unsigned long long end = offset + len, i_size, remote_i_size; 3320 long rc; 3321 unsigned int xid; 3322 __u8 set_sparse = 1; 3323 3324 xid = get_xid(); 3325 3326 inode_lock(inode); 3327 /* Need to make file sparse, if not already, before freeing range. */ 3328 /* Consider adding equivalent for compressed since it could also work */ 3329 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3330 rc = -EOPNOTSUPP; 3331 goto out; 3332 } 3333 3334 filemap_invalidate_lock(inode->i_mapping); 3335 /* 3336 * We implement the punch hole through ioctl, so we need remove the page 3337 * caches first, otherwise the data may be inconsistent with the server. 3338 */ 3339 truncate_pagecache_range(inode, offset, offset + len - 1); 3340 3341 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3342 3343 fsctl_buf.FileOffset = cpu_to_le64(offset); 3344 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3345 3346 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3347 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3348 (char *)&fsctl_buf, 3349 sizeof(struct file_zero_data_information), 3350 CIFSMaxBufSize, NULL, NULL); 3351 3352 if (rc) 3353 goto unlock; 3354 3355 /* If there's dirty data in the buffer that would extend the EOF if it 3356 * were written, then we need to move the EOF marker over to the lower 3357 * of the high end of the hole and the proposed EOF. The problem is 3358 * that we locally hole-punch the tail of the dirty data, the proposed 3359 * EOF update will end up in the wrong place. 3360 */ 3361 i_size = i_size_read(inode); 3362 remote_i_size = netfs_inode(inode)->remote_i_size; 3363 if (end > remote_i_size && i_size > remote_i_size) { 3364 unsigned long long extend_to = umin(end, i_size); 3365 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3366 cfile->fid.volatile_fid, cfile->pid, extend_to); 3367 if (rc >= 0) 3368 netfs_inode(inode)->remote_i_size = extend_to; 3369 } 3370 3371 unlock: 3372 filemap_invalidate_unlock(inode->i_mapping); 3373 out: 3374 inode_unlock(inode); 3375 free_xid(xid); 3376 return rc; 3377 } 3378 3379 static int smb3_simple_fallocate_write_range(unsigned int xid, 3380 struct cifs_tcon *tcon, 3381 struct cifsFileInfo *cfile, 3382 loff_t off, loff_t len, 3383 char *buf) 3384 { 3385 struct cifs_io_parms io_parms = {0}; 3386 int nbytes; 3387 int rc = 0; 3388 struct kvec iov[2]; 3389 3390 io_parms.netfid = cfile->fid.netfid; 3391 io_parms.pid = current->tgid; 3392 io_parms.tcon = tcon; 3393 io_parms.persistent_fid = cfile->fid.persistent_fid; 3394 io_parms.volatile_fid = cfile->fid.volatile_fid; 3395 3396 while (len) { 3397 io_parms.offset = off; 3398 io_parms.length = len; 3399 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3400 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3401 /* iov[0] is reserved for smb header */ 3402 iov[1].iov_base = buf; 3403 iov[1].iov_len = io_parms.length; 3404 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3405 if (rc) 3406 break; 3407 if (nbytes > len) 3408 return -EINVAL; 3409 buf += nbytes; 3410 off += nbytes; 3411 len -= nbytes; 3412 } 3413 return rc; 3414 } 3415 3416 static int smb3_simple_fallocate_range(unsigned int xid, 3417 struct cifs_tcon *tcon, 3418 struct cifsFileInfo *cfile, 3419 loff_t off, loff_t len) 3420 { 3421 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3422 u32 out_data_len; 3423 char *buf = NULL; 3424 loff_t l; 3425 int rc; 3426 3427 in_data.file_offset = cpu_to_le64(off); 3428 in_data.length = cpu_to_le64(len); 3429 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3430 cfile->fid.volatile_fid, 3431 FSCTL_QUERY_ALLOCATED_RANGES, 3432 (char *)&in_data, sizeof(in_data), 3433 1024 * sizeof(struct file_allocated_range_buffer), 3434 (char **)&out_data, &out_data_len); 3435 if (rc) 3436 goto out; 3437 3438 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3439 if (buf == NULL) { 3440 rc = -ENOMEM; 3441 goto out; 3442 } 3443 3444 tmp_data = out_data; 3445 while (len) { 3446 /* 3447 * The rest of the region is unmapped so write it all. 3448 */ 3449 if (out_data_len == 0) { 3450 rc = smb3_simple_fallocate_write_range(xid, tcon, 3451 cfile, off, len, buf); 3452 goto out; 3453 } 3454 3455 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3456 rc = -EINVAL; 3457 goto out; 3458 } 3459 3460 if (off < le64_to_cpu(tmp_data->file_offset)) { 3461 /* 3462 * We are at a hole. Write until the end of the region 3463 * or until the next allocated data, 3464 * whichever comes next. 3465 */ 3466 l = le64_to_cpu(tmp_data->file_offset) - off; 3467 if (len < l) 3468 l = len; 3469 rc = smb3_simple_fallocate_write_range(xid, tcon, 3470 cfile, off, l, buf); 3471 if (rc) 3472 goto out; 3473 off = off + l; 3474 len = len - l; 3475 if (len == 0) 3476 goto out; 3477 } 3478 /* 3479 * We are at a section of allocated data, just skip forward 3480 * until the end of the data or the end of the region 3481 * we are supposed to fallocate, whichever comes first. 3482 */ 3483 l = le64_to_cpu(tmp_data->length); 3484 if (len < l) 3485 l = len; 3486 off += l; 3487 len -= l; 3488 3489 tmp_data = &tmp_data[1]; 3490 out_data_len -= sizeof(struct file_allocated_range_buffer); 3491 } 3492 3493 out: 3494 kfree(out_data); 3495 kfree(buf); 3496 return rc; 3497 } 3498 3499 3500 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3501 loff_t off, loff_t len, bool keep_size) 3502 { 3503 struct inode *inode; 3504 struct cifsInodeInfo *cifsi; 3505 struct cifsFileInfo *cfile = file->private_data; 3506 long rc = -EOPNOTSUPP; 3507 unsigned int xid; 3508 loff_t new_eof; 3509 3510 xid = get_xid(); 3511 3512 inode = d_inode(cfile->dentry); 3513 cifsi = CIFS_I(inode); 3514 3515 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3516 tcon->ses->Suid, off, len); 3517 /* if file not oplocked can't be sure whether asking to extend size */ 3518 if (!CIFS_CACHE_READ(cifsi)) 3519 if (keep_size == false) { 3520 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3521 tcon->tid, tcon->ses->Suid, off, len, rc); 3522 free_xid(xid); 3523 return rc; 3524 } 3525 3526 /* 3527 * Extending the file 3528 */ 3529 if ((keep_size == false) && i_size_read(inode) < off + len) { 3530 rc = inode_newsize_ok(inode, off + len); 3531 if (rc) 3532 goto out; 3533 3534 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3535 smb2_set_sparse(xid, tcon, cfile, inode, false); 3536 3537 new_eof = off + len; 3538 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3539 cfile->fid.volatile_fid, cfile->pid, new_eof); 3540 if (rc == 0) { 3541 netfs_resize_file(&cifsi->netfs, new_eof, true); 3542 cifs_setsize(inode, new_eof); 3543 } 3544 goto out; 3545 } 3546 3547 /* 3548 * Files are non-sparse by default so falloc may be a no-op 3549 * Must check if file sparse. If not sparse, and since we are not 3550 * extending then no need to do anything since file already allocated 3551 */ 3552 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3553 rc = 0; 3554 goto out; 3555 } 3556 3557 if (keep_size == true) { 3558 /* 3559 * We can not preallocate pages beyond the end of the file 3560 * in SMB2 3561 */ 3562 if (off >= i_size_read(inode)) { 3563 rc = 0; 3564 goto out; 3565 } 3566 /* 3567 * For fallocates that are partially beyond the end of file, 3568 * clamp len so we only fallocate up to the end of file. 3569 */ 3570 if (off + len > i_size_read(inode)) { 3571 len = i_size_read(inode) - off; 3572 } 3573 } 3574 3575 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3576 /* 3577 * At this point, we are trying to fallocate an internal 3578 * regions of a sparse file. Since smb2 does not have a 3579 * fallocate command we have two options on how to emulate this. 3580 * We can either turn the entire file to become non-sparse 3581 * which we only do if the fallocate is for virtually 3582 * the whole file, or we can overwrite the region with zeroes 3583 * using SMB2_write, which could be prohibitevly expensive 3584 * if len is large. 3585 */ 3586 /* 3587 * We are only trying to fallocate a small region so 3588 * just write it with zero. 3589 */ 3590 if (len <= 1024 * 1024) { 3591 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3592 off, len); 3593 goto out; 3594 } 3595 3596 /* 3597 * Check if falloc starts within first few pages of file 3598 * and ends within a few pages of the end of file to 3599 * ensure that most of file is being forced to be 3600 * fallocated now. If so then setting whole file sparse 3601 * ie potentially making a few extra pages at the beginning 3602 * or end of the file non-sparse via set_sparse is harmless. 3603 */ 3604 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3605 rc = -EOPNOTSUPP; 3606 goto out; 3607 } 3608 } 3609 3610 smb2_set_sparse(xid, tcon, cfile, inode, false); 3611 rc = 0; 3612 3613 out: 3614 if (rc) 3615 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3616 tcon->ses->Suid, off, len, rc); 3617 else 3618 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3619 tcon->ses->Suid, off, len); 3620 3621 free_xid(xid); 3622 return rc; 3623 } 3624 3625 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3626 loff_t off, loff_t len) 3627 { 3628 int rc; 3629 unsigned int xid; 3630 struct inode *inode = file_inode(file); 3631 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3632 struct cifsFileInfo *cfile = file->private_data; 3633 struct netfs_inode *ictx = &cifsi->netfs; 3634 loff_t old_eof, new_eof; 3635 3636 xid = get_xid(); 3637 3638 inode_lock(inode); 3639 3640 old_eof = i_size_read(inode); 3641 if ((off >= old_eof) || 3642 off + len >= old_eof) { 3643 rc = -EINVAL; 3644 goto out; 3645 } 3646 3647 filemap_invalidate_lock(inode->i_mapping); 3648 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3649 if (rc < 0) 3650 goto out_2; 3651 3652 truncate_pagecache_range(inode, off, old_eof); 3653 ictx->zero_point = old_eof; 3654 3655 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3656 old_eof - off - len, off); 3657 if (rc < 0) 3658 goto out_2; 3659 3660 new_eof = old_eof - len; 3661 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3662 cfile->fid.volatile_fid, cfile->pid, new_eof); 3663 if (rc < 0) 3664 goto out_2; 3665 3666 rc = 0; 3667 3668 truncate_setsize(inode, new_eof); 3669 netfs_resize_file(&cifsi->netfs, new_eof, true); 3670 ictx->zero_point = new_eof; 3671 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3672 out_2: 3673 filemap_invalidate_unlock(inode->i_mapping); 3674 out: 3675 inode_unlock(inode); 3676 free_xid(xid); 3677 return rc; 3678 } 3679 3680 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3681 loff_t off, loff_t len) 3682 { 3683 int rc; 3684 unsigned int xid; 3685 struct cifsFileInfo *cfile = file->private_data; 3686 struct inode *inode = file_inode(file); 3687 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3688 __u64 count, old_eof, new_eof; 3689 3690 xid = get_xid(); 3691 3692 inode_lock(inode); 3693 3694 old_eof = i_size_read(inode); 3695 if (off >= old_eof) { 3696 rc = -EINVAL; 3697 goto out; 3698 } 3699 3700 count = old_eof - off; 3701 new_eof = old_eof + len; 3702 3703 filemap_invalidate_lock(inode->i_mapping); 3704 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3705 if (rc < 0) 3706 goto out_2; 3707 truncate_pagecache_range(inode, off, old_eof); 3708 3709 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3710 cfile->fid.volatile_fid, cfile->pid, new_eof); 3711 if (rc < 0) 3712 goto out_2; 3713 3714 truncate_setsize(inode, new_eof); 3715 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3716 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3717 3718 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3719 if (rc < 0) 3720 goto out_2; 3721 cifsi->netfs.zero_point = new_eof; 3722 3723 rc = smb3_zero_data(file, tcon, off, len, xid); 3724 if (rc < 0) 3725 goto out_2; 3726 3727 rc = 0; 3728 out_2: 3729 filemap_invalidate_unlock(inode->i_mapping); 3730 out: 3731 inode_unlock(inode); 3732 free_xid(xid); 3733 return rc; 3734 } 3735 3736 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3737 { 3738 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3739 struct cifsInodeInfo *cifsi; 3740 struct inode *inode; 3741 int rc = 0; 3742 struct file_allocated_range_buffer in_data, *out_data = NULL; 3743 u32 out_data_len; 3744 unsigned int xid; 3745 3746 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3747 return generic_file_llseek(file, offset, whence); 3748 3749 inode = d_inode(cfile->dentry); 3750 cifsi = CIFS_I(inode); 3751 3752 if (offset < 0 || offset >= i_size_read(inode)) 3753 return -ENXIO; 3754 3755 xid = get_xid(); 3756 /* 3757 * We need to be sure that all dirty pages are written as they 3758 * might fill holes on the server. 3759 * Note that we also MUST flush any written pages since at least 3760 * some servers (Windows2016) will not reflect recent writes in 3761 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3762 */ 3763 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3764 if (wrcfile) { 3765 filemap_write_and_wait(inode->i_mapping); 3766 smb2_flush_file(xid, tcon, &wrcfile->fid); 3767 cifsFileInfo_put(wrcfile); 3768 } 3769 3770 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3771 if (whence == SEEK_HOLE) 3772 offset = i_size_read(inode); 3773 goto lseek_exit; 3774 } 3775 3776 in_data.file_offset = cpu_to_le64(offset); 3777 in_data.length = cpu_to_le64(i_size_read(inode)); 3778 3779 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3780 cfile->fid.volatile_fid, 3781 FSCTL_QUERY_ALLOCATED_RANGES, 3782 (char *)&in_data, sizeof(in_data), 3783 sizeof(struct file_allocated_range_buffer), 3784 (char **)&out_data, &out_data_len); 3785 if (rc == -E2BIG) 3786 rc = 0; 3787 if (rc) 3788 goto lseek_exit; 3789 3790 if (whence == SEEK_HOLE && out_data_len == 0) 3791 goto lseek_exit; 3792 3793 if (whence == SEEK_DATA && out_data_len == 0) { 3794 rc = -ENXIO; 3795 goto lseek_exit; 3796 } 3797 3798 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3799 rc = -EINVAL; 3800 goto lseek_exit; 3801 } 3802 if (whence == SEEK_DATA) { 3803 offset = le64_to_cpu(out_data->file_offset); 3804 goto lseek_exit; 3805 } 3806 if (offset < le64_to_cpu(out_data->file_offset)) 3807 goto lseek_exit; 3808 3809 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3810 3811 lseek_exit: 3812 free_xid(xid); 3813 kfree(out_data); 3814 if (!rc) 3815 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3816 else 3817 return rc; 3818 } 3819 3820 static int smb3_fiemap(struct cifs_tcon *tcon, 3821 struct cifsFileInfo *cfile, 3822 struct fiemap_extent_info *fei, u64 start, u64 len) 3823 { 3824 unsigned int xid; 3825 struct file_allocated_range_buffer in_data, *out_data; 3826 u32 out_data_len; 3827 int i, num, rc, flags, last_blob; 3828 u64 next; 3829 3830 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3831 if (rc) 3832 return rc; 3833 3834 xid = get_xid(); 3835 again: 3836 in_data.file_offset = cpu_to_le64(start); 3837 in_data.length = cpu_to_le64(len); 3838 3839 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3840 cfile->fid.volatile_fid, 3841 FSCTL_QUERY_ALLOCATED_RANGES, 3842 (char *)&in_data, sizeof(in_data), 3843 1024 * sizeof(struct file_allocated_range_buffer), 3844 (char **)&out_data, &out_data_len); 3845 if (rc == -E2BIG) { 3846 last_blob = 0; 3847 rc = 0; 3848 } else 3849 last_blob = 1; 3850 if (rc) 3851 goto out; 3852 3853 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3854 rc = -EINVAL; 3855 goto out; 3856 } 3857 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3858 rc = -EINVAL; 3859 goto out; 3860 } 3861 3862 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3863 for (i = 0; i < num; i++) { 3864 flags = 0; 3865 if (i == num - 1 && last_blob) 3866 flags |= FIEMAP_EXTENT_LAST; 3867 3868 rc = fiemap_fill_next_extent(fei, 3869 le64_to_cpu(out_data[i].file_offset), 3870 le64_to_cpu(out_data[i].file_offset), 3871 le64_to_cpu(out_data[i].length), 3872 flags); 3873 if (rc < 0) 3874 goto out; 3875 if (rc == 1) { 3876 rc = 0; 3877 goto out; 3878 } 3879 } 3880 3881 if (!last_blob) { 3882 next = le64_to_cpu(out_data[num - 1].file_offset) + 3883 le64_to_cpu(out_data[num - 1].length); 3884 len = len - (next - start); 3885 start = next; 3886 goto again; 3887 } 3888 3889 out: 3890 free_xid(xid); 3891 kfree(out_data); 3892 return rc; 3893 } 3894 3895 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3896 loff_t off, loff_t len) 3897 { 3898 /* KEEP_SIZE already checked for by do_fallocate */ 3899 if (mode & FALLOC_FL_PUNCH_HOLE) 3900 return smb3_punch_hole(file, tcon, off, len); 3901 else if (mode & FALLOC_FL_ZERO_RANGE) { 3902 if (mode & FALLOC_FL_KEEP_SIZE) 3903 return smb3_zero_range(file, tcon, off, len, true); 3904 return smb3_zero_range(file, tcon, off, len, false); 3905 } else if (mode == FALLOC_FL_KEEP_SIZE) 3906 return smb3_simple_falloc(file, tcon, off, len, true); 3907 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3908 return smb3_collapse_range(file, tcon, off, len); 3909 else if (mode == FALLOC_FL_INSERT_RANGE) 3910 return smb3_insert_range(file, tcon, off, len); 3911 else if (mode == 0) 3912 return smb3_simple_falloc(file, tcon, off, len, false); 3913 3914 return -EOPNOTSUPP; 3915 } 3916 3917 static void 3918 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3919 struct cifsInodeInfo *cinode, __u32 oplock, 3920 __u16 epoch, bool *purge_cache) 3921 { 3922 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3923 } 3924 3925 static void 3926 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3927 __u16 epoch, bool *purge_cache); 3928 3929 static void 3930 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3931 struct cifsInodeInfo *cinode, __u32 oplock, 3932 __u16 epoch, bool *purge_cache) 3933 { 3934 unsigned int old_state = cinode->oplock; 3935 __u16 old_epoch = cinode->epoch; 3936 unsigned int new_state; 3937 3938 if (epoch > old_epoch) { 3939 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3940 cinode->epoch = epoch; 3941 } 3942 3943 new_state = cinode->oplock; 3944 *purge_cache = false; 3945 3946 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3947 (new_state & CIFS_CACHE_READ_FLG) == 0) 3948 *purge_cache = true; 3949 else if (old_state == new_state && (epoch - old_epoch > 1)) 3950 *purge_cache = true; 3951 } 3952 3953 static void 3954 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3955 __u16 epoch, bool *purge_cache) 3956 { 3957 oplock &= 0xFF; 3958 cinode->lease_granted = false; 3959 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3960 return; 3961 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3962 cinode->oplock = CIFS_CACHE_RHW_FLG; 3963 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3964 &cinode->netfs.inode); 3965 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3966 cinode->oplock = CIFS_CACHE_RW_FLG; 3967 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3968 &cinode->netfs.inode); 3969 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3970 cinode->oplock = CIFS_CACHE_READ_FLG; 3971 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3972 &cinode->netfs.inode); 3973 } else 3974 cinode->oplock = 0; 3975 } 3976 3977 static void 3978 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3979 __u16 epoch, bool *purge_cache) 3980 { 3981 char message[5] = {0}; 3982 unsigned int new_oplock = 0; 3983 3984 oplock &= 0xFF; 3985 cinode->lease_granted = true; 3986 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3987 return; 3988 3989 /* Check if the server granted an oplock rather than a lease */ 3990 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3991 return smb2_set_oplock_level(cinode, oplock, epoch, 3992 purge_cache); 3993 3994 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3995 new_oplock |= CIFS_CACHE_READ_FLG; 3996 strcat(message, "R"); 3997 } 3998 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3999 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4000 strcat(message, "H"); 4001 } 4002 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4003 new_oplock |= CIFS_CACHE_WRITE_FLG; 4004 strcat(message, "W"); 4005 } 4006 if (!new_oplock) 4007 strscpy(message, "None"); 4008 4009 cinode->oplock = new_oplock; 4010 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4011 &cinode->netfs.inode); 4012 } 4013 4014 static void 4015 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4016 __u16 epoch, bool *purge_cache) 4017 { 4018 unsigned int old_oplock = cinode->oplock; 4019 4020 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4021 4022 if (purge_cache) { 4023 *purge_cache = false; 4024 if (old_oplock == CIFS_CACHE_READ_FLG) { 4025 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4026 (epoch - cinode->epoch > 0)) 4027 *purge_cache = true; 4028 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4029 (epoch - cinode->epoch > 1)) 4030 *purge_cache = true; 4031 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4032 (epoch - cinode->epoch > 1)) 4033 *purge_cache = true; 4034 else if (cinode->oplock == 0 && 4035 (epoch - cinode->epoch > 0)) 4036 *purge_cache = true; 4037 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4038 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4039 (epoch - cinode->epoch > 0)) 4040 *purge_cache = true; 4041 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4042 (epoch - cinode->epoch > 1)) 4043 *purge_cache = true; 4044 } 4045 cinode->epoch = epoch; 4046 } 4047 } 4048 4049 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4050 static bool 4051 smb2_is_read_op(__u32 oplock) 4052 { 4053 return oplock == SMB2_OPLOCK_LEVEL_II; 4054 } 4055 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4056 4057 static bool 4058 smb21_is_read_op(__u32 oplock) 4059 { 4060 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4061 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4062 } 4063 4064 static __le32 4065 map_oplock_to_lease(u8 oplock) 4066 { 4067 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4068 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4069 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4070 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4071 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4072 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4073 SMB2_LEASE_WRITE_CACHING_LE; 4074 return 0; 4075 } 4076 4077 static char * 4078 smb2_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4079 { 4080 struct create_lease *buf; 4081 4082 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4083 if (!buf) 4084 return NULL; 4085 4086 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4087 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4088 4089 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4090 (struct create_lease, lcontext)); 4091 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4092 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4093 (struct create_lease, Name)); 4094 buf->ccontext.NameLength = cpu_to_le16(4); 4095 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4096 buf->Name[0] = 'R'; 4097 buf->Name[1] = 'q'; 4098 buf->Name[2] = 'L'; 4099 buf->Name[3] = 's'; 4100 return (char *)buf; 4101 } 4102 4103 static char * 4104 smb3_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4105 { 4106 struct create_lease_v2 *buf; 4107 4108 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4109 if (!buf) 4110 return NULL; 4111 4112 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4113 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4114 buf->lcontext.LeaseFlags = flags; 4115 if (flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 4116 memcpy(&buf->lcontext.ParentLeaseKey, parent_lease_key, SMB2_LEASE_KEY_SIZE); 4117 4118 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4119 (struct create_lease_v2, lcontext)); 4120 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4121 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4122 (struct create_lease_v2, Name)); 4123 buf->ccontext.NameLength = cpu_to_le16(4); 4124 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4125 buf->Name[0] = 'R'; 4126 buf->Name[1] = 'q'; 4127 buf->Name[2] = 'L'; 4128 buf->Name[3] = 's'; 4129 return (char *)buf; 4130 } 4131 4132 static __u8 4133 smb2_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4134 { 4135 struct create_lease *lc = (struct create_lease *)buf; 4136 4137 *epoch = 0; /* not used */ 4138 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4139 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4140 return le32_to_cpu(lc->lcontext.LeaseState); 4141 } 4142 4143 static __u8 4144 smb3_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4145 { 4146 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4147 4148 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4149 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4150 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4151 if (lease_key) 4152 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4153 return le32_to_cpu(lc->lcontext.LeaseState); 4154 } 4155 4156 static unsigned int 4157 smb2_wp_retry_size(struct inode *inode) 4158 { 4159 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4160 SMB2_MAX_BUFFER_SIZE); 4161 } 4162 4163 static bool 4164 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4165 { 4166 return !cfile->invalidHandle; 4167 } 4168 4169 static void 4170 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4171 struct smb_rqst *old_rq, __le16 cipher_type) 4172 { 4173 struct smb2_hdr *shdr = 4174 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4175 4176 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4177 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4178 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4179 tr_hdr->Flags = cpu_to_le16(0x01); 4180 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4181 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4182 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4183 else 4184 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4185 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4186 } 4187 4188 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4189 int num_rqst, const u8 *sig, u8 **iv, 4190 struct aead_request **req, struct sg_table *sgt, 4191 unsigned int *num_sgs, size_t *sensitive_size) 4192 { 4193 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4194 unsigned int iv_size = crypto_aead_ivsize(tfm); 4195 unsigned int len; 4196 u8 *p; 4197 4198 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4199 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4200 return ERR_PTR(*num_sgs); 4201 4202 len = iv_size; 4203 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4204 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4205 len += req_size; 4206 len = ALIGN(len, __alignof__(struct scatterlist)); 4207 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4208 *sensitive_size = len; 4209 4210 p = kvzalloc(len, GFP_NOFS); 4211 if (!p) 4212 return ERR_PTR(-ENOMEM); 4213 4214 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4215 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4216 crypto_tfm_ctx_alignment()); 4217 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4218 __alignof__(struct scatterlist)); 4219 return p; 4220 } 4221 4222 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4223 int num_rqst, const u8 *sig, u8 **iv, 4224 struct aead_request **req, struct scatterlist **sgl, 4225 size_t *sensitive_size) 4226 { 4227 struct sg_table sgtable = {}; 4228 unsigned int skip, num_sgs, i, j; 4229 ssize_t rc; 4230 void *p; 4231 4232 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4233 &num_sgs, sensitive_size); 4234 if (IS_ERR(p)) 4235 return ERR_CAST(p); 4236 4237 sg_init_marker(sgtable.sgl, num_sgs); 4238 4239 /* 4240 * The first rqst has a transform header where the 4241 * first 20 bytes are not part of the encrypted blob. 4242 */ 4243 skip = 20; 4244 4245 for (i = 0; i < num_rqst; i++) { 4246 struct iov_iter *iter = &rqst[i].rq_iter; 4247 size_t count = iov_iter_count(iter); 4248 4249 for (j = 0; j < rqst[i].rq_nvec; j++) { 4250 cifs_sg_set_buf(&sgtable, 4251 rqst[i].rq_iov[j].iov_base + skip, 4252 rqst[i].rq_iov[j].iov_len - skip); 4253 4254 /* See the above comment on the 'skip' assignment */ 4255 skip = 0; 4256 } 4257 sgtable.orig_nents = sgtable.nents; 4258 4259 rc = extract_iter_to_sg(iter, count, &sgtable, 4260 num_sgs - sgtable.nents, 0); 4261 iov_iter_revert(iter, rc); 4262 sgtable.orig_nents = sgtable.nents; 4263 } 4264 4265 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4266 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4267 *sgl = sgtable.sgl; 4268 return p; 4269 } 4270 4271 static int 4272 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4273 { 4274 struct TCP_Server_Info *pserver; 4275 struct cifs_ses *ses; 4276 u8 *ses_enc_key; 4277 4278 /* If server is a channel, select the primary channel */ 4279 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4280 4281 spin_lock(&cifs_tcp_ses_lock); 4282 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4283 if (ses->Suid == ses_id) { 4284 spin_lock(&ses->ses_lock); 4285 ses_enc_key = enc ? ses->smb3encryptionkey : 4286 ses->smb3decryptionkey; 4287 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4288 spin_unlock(&ses->ses_lock); 4289 spin_unlock(&cifs_tcp_ses_lock); 4290 return 0; 4291 } 4292 } 4293 spin_unlock(&cifs_tcp_ses_lock); 4294 4295 trace_smb3_ses_not_found(ses_id); 4296 4297 return -EAGAIN; 4298 } 4299 /* 4300 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4301 * iov[0] - transform header (associate data), 4302 * iov[1-N] - SMB2 header and pages - data to encrypt. 4303 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4304 * untouched. 4305 */ 4306 static int 4307 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4308 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4309 { 4310 struct smb2_transform_hdr *tr_hdr = 4311 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4312 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4313 int rc = 0; 4314 struct scatterlist *sg; 4315 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4316 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4317 struct aead_request *req; 4318 u8 *iv; 4319 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4320 void *creq; 4321 size_t sensitive_size; 4322 4323 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4324 if (rc) { 4325 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4326 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4327 return rc; 4328 } 4329 4330 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4331 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4332 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4333 else 4334 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4335 4336 if (rc) { 4337 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4338 return rc; 4339 } 4340 4341 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4342 if (rc) { 4343 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4344 return rc; 4345 } 4346 4347 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4348 &sensitive_size); 4349 if (IS_ERR(creq)) 4350 return PTR_ERR(creq); 4351 4352 if (!enc) { 4353 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4354 crypt_len += SMB2_SIGNATURE_SIZE; 4355 } 4356 4357 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4358 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4359 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4360 else { 4361 iv[0] = 3; 4362 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4363 } 4364 4365 aead_request_set_tfm(req, tfm); 4366 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4367 aead_request_set_ad(req, assoc_data_len); 4368 4369 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req); 4370 4371 if (!rc && enc) 4372 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4373 4374 kvfree_sensitive(creq, sensitive_size); 4375 return rc; 4376 } 4377 4378 /* 4379 * Clear a read buffer, discarding the folios which have the 1st mark set. 4380 */ 4381 static void cifs_clear_folioq_buffer(struct folio_queue *buffer) 4382 { 4383 struct folio_queue *folioq; 4384 4385 while ((folioq = buffer)) { 4386 for (int s = 0; s < folioq_count(folioq); s++) 4387 if (folioq_is_marked(folioq, s)) 4388 folio_put(folioq_folio(folioq, s)); 4389 buffer = folioq->next; 4390 kfree(folioq); 4391 } 4392 } 4393 4394 /* 4395 * Allocate buffer space into a folio queue. 4396 */ 4397 static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size) 4398 { 4399 struct folio_queue *buffer = NULL, *tail = NULL, *p; 4400 struct folio *folio; 4401 unsigned int slot; 4402 4403 do { 4404 if (!tail || folioq_full(tail)) { 4405 p = kmalloc(sizeof(*p), GFP_NOFS); 4406 if (!p) 4407 goto nomem; 4408 folioq_init(p, 0); 4409 if (tail) { 4410 tail->next = p; 4411 p->prev = tail; 4412 } else { 4413 buffer = p; 4414 } 4415 tail = p; 4416 } 4417 4418 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0); 4419 if (!folio) 4420 goto nomem; 4421 4422 slot = folioq_append_mark(tail, folio); 4423 size -= folioq_folio_size(tail, slot); 4424 } while (size > 0); 4425 4426 return buffer; 4427 4428 nomem: 4429 cifs_clear_folioq_buffer(buffer); 4430 return NULL; 4431 } 4432 4433 /* 4434 * Copy data from an iterator to the folios in a folio queue buffer. 4435 */ 4436 static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size, 4437 struct folio_queue *buffer) 4438 { 4439 for (; buffer; buffer = buffer->next) { 4440 for (int s = 0; s < folioq_count(buffer); s++) { 4441 struct folio *folio = folioq_folio(buffer, s); 4442 size_t part = folioq_folio_size(buffer, s); 4443 4444 part = umin(part, size); 4445 4446 if (copy_folio_from_iter(folio, 0, part, iter) != part) 4447 return false; 4448 size -= part; 4449 } 4450 } 4451 return true; 4452 } 4453 4454 void 4455 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4456 { 4457 for (int i = 0; i < num_rqst; i++) 4458 cifs_clear_folioq_buffer(rqst[i].rq_buffer); 4459 } 4460 4461 /* 4462 * This function will initialize new_rq and encrypt the content. 4463 * The first entry, new_rq[0], only contains a single iov which contains 4464 * a smb2_transform_hdr and is pre-allocated by the caller. 4465 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4466 * 4467 * The end result is an array of smb_rqst structures where the first structure 4468 * only contains a single iov for the transform header which we then can pass 4469 * to crypt_message(). 4470 * 4471 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4472 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4473 */ 4474 static int 4475 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4476 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4477 { 4478 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4479 unsigned int orig_len = 0; 4480 int rc = -ENOMEM; 4481 4482 for (int i = 1; i < num_rqst; i++) { 4483 struct smb_rqst *old = &old_rq[i - 1]; 4484 struct smb_rqst *new = &new_rq[i]; 4485 struct folio_queue *buffer; 4486 size_t size = iov_iter_count(&old->rq_iter); 4487 4488 orig_len += smb_rqst_len(server, old); 4489 new->rq_iov = old->rq_iov; 4490 new->rq_nvec = old->rq_nvec; 4491 4492 if (size > 0) { 4493 buffer = cifs_alloc_folioq_buffer(size); 4494 if (!buffer) 4495 goto err_free; 4496 4497 new->rq_buffer = buffer; 4498 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE, 4499 buffer, 0, 0, size); 4500 4501 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) { 4502 rc = -EIO; 4503 goto err_free; 4504 } 4505 } 4506 } 4507 4508 /* fill the 1st iov with a transform header */ 4509 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4510 4511 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4512 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4513 if (rc) 4514 goto err_free; 4515 4516 return rc; 4517 4518 err_free: 4519 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4520 return rc; 4521 } 4522 4523 static int 4524 smb3_is_transform_hdr(void *buf) 4525 { 4526 struct smb2_transform_hdr *trhdr = buf; 4527 4528 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4529 } 4530 4531 static int 4532 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4533 unsigned int buf_data_size, struct iov_iter *iter, 4534 bool is_offloaded) 4535 { 4536 struct crypto_aead *tfm; 4537 struct smb_rqst rqst = {NULL}; 4538 struct kvec iov[2]; 4539 size_t iter_size = 0; 4540 int rc; 4541 4542 iov[0].iov_base = buf; 4543 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4544 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4545 iov[1].iov_len = buf_data_size; 4546 4547 rqst.rq_iov = iov; 4548 rqst.rq_nvec = 2; 4549 if (iter) { 4550 rqst.rq_iter = *iter; 4551 iter_size = iov_iter_count(iter); 4552 } 4553 4554 if (is_offloaded) { 4555 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4556 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4557 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4558 else 4559 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4560 if (IS_ERR(tfm)) { 4561 rc = PTR_ERR(tfm); 4562 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4563 4564 return rc; 4565 } 4566 } else { 4567 rc = smb3_crypto_aead_allocate(server); 4568 if (unlikely(rc)) 4569 return rc; 4570 tfm = server->secmech.dec; 4571 } 4572 4573 rc = crypt_message(server, 1, &rqst, 0, tfm); 4574 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4575 4576 if (is_offloaded) 4577 crypto_free_aead(tfm); 4578 4579 if (rc) 4580 return rc; 4581 4582 memmove(buf, iov[1].iov_base, buf_data_size); 4583 4584 if (!is_offloaded) 4585 server->total_read = buf_data_size + iter_size; 4586 4587 return rc; 4588 } 4589 4590 static int 4591 cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size, 4592 size_t skip, struct iov_iter *iter) 4593 { 4594 for (; folioq; folioq = folioq->next) { 4595 for (int s = 0; s < folioq_count(folioq); s++) { 4596 struct folio *folio = folioq_folio(folioq, s); 4597 size_t fsize = folio_size(folio); 4598 size_t n, len = umin(fsize - skip, data_size); 4599 4600 n = copy_folio_to_iter(folio, skip, len, iter); 4601 if (n != len) { 4602 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4603 return -EIO; 4604 } 4605 data_size -= n; 4606 skip = 0; 4607 } 4608 } 4609 4610 return 0; 4611 } 4612 4613 static int 4614 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4615 char *buf, unsigned int buf_len, struct folio_queue *buffer, 4616 unsigned int buffer_len, bool is_offloaded) 4617 { 4618 unsigned int data_offset; 4619 unsigned int data_len; 4620 unsigned int cur_off; 4621 unsigned int cur_page_idx; 4622 unsigned int pad_len; 4623 struct cifs_io_subrequest *rdata = mid->callback_data; 4624 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4625 int length; 4626 bool use_rdma_mr = false; 4627 4628 if (shdr->Command != SMB2_READ) { 4629 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4630 return -EOPNOTSUPP; 4631 } 4632 4633 if (server->ops->is_session_expired && 4634 server->ops->is_session_expired(buf)) { 4635 if (!is_offloaded) 4636 cifs_reconnect(server, true); 4637 return -1; 4638 } 4639 4640 if (server->ops->is_status_pending && 4641 server->ops->is_status_pending(buf, server)) 4642 return -1; 4643 4644 /* set up first two iov to get credits */ 4645 rdata->iov[0].iov_base = buf; 4646 rdata->iov[0].iov_len = 0; 4647 rdata->iov[1].iov_base = buf; 4648 rdata->iov[1].iov_len = 4649 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4650 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4651 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4652 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4653 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4654 4655 rdata->result = server->ops->map_error(buf, true); 4656 if (rdata->result != 0) { 4657 cifs_dbg(FYI, "%s: server returned error %d\n", 4658 __func__, rdata->result); 4659 /* normal error on read response */ 4660 if (is_offloaded) 4661 mid->mid_state = MID_RESPONSE_RECEIVED; 4662 else 4663 dequeue_mid(mid, false); 4664 return 0; 4665 } 4666 4667 data_offset = server->ops->read_data_offset(buf); 4668 #ifdef CONFIG_CIFS_SMB_DIRECT 4669 use_rdma_mr = rdata->mr; 4670 #endif 4671 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4672 4673 if (data_offset < server->vals->read_rsp_size) { 4674 /* 4675 * win2k8 sometimes sends an offset of 0 when the read 4676 * is beyond the EOF. Treat it as if the data starts just after 4677 * the header. 4678 */ 4679 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4680 __func__, data_offset); 4681 data_offset = server->vals->read_rsp_size; 4682 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4683 /* data_offset is beyond the end of smallbuf */ 4684 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4685 __func__, data_offset); 4686 rdata->result = -EIO; 4687 if (is_offloaded) 4688 mid->mid_state = MID_RESPONSE_MALFORMED; 4689 else 4690 dequeue_mid(mid, rdata->result); 4691 return 0; 4692 } 4693 4694 pad_len = data_offset - server->vals->read_rsp_size; 4695 4696 if (buf_len <= data_offset) { 4697 /* read response payload is in pages */ 4698 cur_page_idx = pad_len / PAGE_SIZE; 4699 cur_off = pad_len % PAGE_SIZE; 4700 4701 if (cur_page_idx != 0) { 4702 /* data offset is beyond the 1st page of response */ 4703 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4704 __func__, data_offset); 4705 rdata->result = -EIO; 4706 if (is_offloaded) 4707 mid->mid_state = MID_RESPONSE_MALFORMED; 4708 else 4709 dequeue_mid(mid, rdata->result); 4710 return 0; 4711 } 4712 4713 if (data_len > buffer_len - pad_len) { 4714 /* data_len is corrupt -- discard frame */ 4715 rdata->result = -EIO; 4716 if (is_offloaded) 4717 mid->mid_state = MID_RESPONSE_MALFORMED; 4718 else 4719 dequeue_mid(mid, rdata->result); 4720 return 0; 4721 } 4722 4723 /* Copy the data to the output I/O iterator. */ 4724 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len, 4725 cur_off, &rdata->subreq.io_iter); 4726 if (rdata->result != 0) { 4727 if (is_offloaded) 4728 mid->mid_state = MID_RESPONSE_MALFORMED; 4729 else 4730 dequeue_mid(mid, rdata->result); 4731 return 0; 4732 } 4733 rdata->got_bytes = buffer_len; 4734 4735 } else if (buf_len >= data_offset + data_len) { 4736 /* read response payload is in buf */ 4737 WARN_ONCE(buffer, "read data can be either in buf or in buffer"); 4738 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4739 if (length < 0) 4740 return length; 4741 rdata->got_bytes = data_len; 4742 } else { 4743 /* read response payload cannot be in both buf and pages */ 4744 WARN_ONCE(1, "buf can not contain only a part of read data"); 4745 rdata->result = -EIO; 4746 if (is_offloaded) 4747 mid->mid_state = MID_RESPONSE_MALFORMED; 4748 else 4749 dequeue_mid(mid, rdata->result); 4750 return 0; 4751 } 4752 4753 if (is_offloaded) 4754 mid->mid_state = MID_RESPONSE_RECEIVED; 4755 else 4756 dequeue_mid(mid, false); 4757 return 0; 4758 } 4759 4760 struct smb2_decrypt_work { 4761 struct work_struct decrypt; 4762 struct TCP_Server_Info *server; 4763 struct folio_queue *buffer; 4764 char *buf; 4765 unsigned int len; 4766 }; 4767 4768 4769 static void smb2_decrypt_offload(struct work_struct *work) 4770 { 4771 struct smb2_decrypt_work *dw = container_of(work, 4772 struct smb2_decrypt_work, decrypt); 4773 int rc; 4774 struct mid_q_entry *mid; 4775 struct iov_iter iter; 4776 4777 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len); 4778 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4779 &iter, true); 4780 if (rc) { 4781 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4782 goto free_pages; 4783 } 4784 4785 dw->server->lstrp = jiffies; 4786 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4787 if (mid == NULL) 4788 cifs_dbg(FYI, "mid not found\n"); 4789 else { 4790 mid->decrypted = true; 4791 rc = handle_read_data(dw->server, mid, dw->buf, 4792 dw->server->vals->read_rsp_size, 4793 dw->buffer, dw->len, 4794 true); 4795 if (rc >= 0) { 4796 #ifdef CONFIG_CIFS_STATS2 4797 mid->when_received = jiffies; 4798 #endif 4799 if (dw->server->ops->is_network_name_deleted) 4800 dw->server->ops->is_network_name_deleted(dw->buf, 4801 dw->server); 4802 4803 mid->callback(mid); 4804 } else { 4805 spin_lock(&dw->server->srv_lock); 4806 if (dw->server->tcpStatus == CifsNeedReconnect) { 4807 spin_lock(&dw->server->mid_lock); 4808 mid->mid_state = MID_RETRY_NEEDED; 4809 spin_unlock(&dw->server->mid_lock); 4810 spin_unlock(&dw->server->srv_lock); 4811 mid->callback(mid); 4812 } else { 4813 spin_lock(&dw->server->mid_lock); 4814 mid->mid_state = MID_REQUEST_SUBMITTED; 4815 mid->mid_flags &= ~(MID_DELETED); 4816 list_add_tail(&mid->qhead, 4817 &dw->server->pending_mid_q); 4818 spin_unlock(&dw->server->mid_lock); 4819 spin_unlock(&dw->server->srv_lock); 4820 } 4821 } 4822 release_mid(mid); 4823 } 4824 4825 free_pages: 4826 cifs_clear_folioq_buffer(dw->buffer); 4827 cifs_small_buf_release(dw->buf); 4828 kfree(dw); 4829 } 4830 4831 4832 static int 4833 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4834 int *num_mids) 4835 { 4836 char *buf = server->smallbuf; 4837 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4838 struct iov_iter iter; 4839 unsigned int len; 4840 unsigned int buflen = server->pdu_size; 4841 int rc; 4842 struct smb2_decrypt_work *dw; 4843 4844 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4845 if (!dw) 4846 return -ENOMEM; 4847 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4848 dw->server = server; 4849 4850 *num_mids = 1; 4851 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4852 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4853 4854 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4855 if (rc < 0) 4856 goto free_dw; 4857 server->total_read += rc; 4858 4859 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4860 server->vals->read_rsp_size; 4861 dw->len = len; 4862 len = round_up(dw->len, PAGE_SIZE); 4863 4864 rc = -ENOMEM; 4865 dw->buffer = cifs_alloc_folioq_buffer(len); 4866 if (!dw->buffer) 4867 goto discard_data; 4868 4869 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len); 4870 4871 /* Read the data into the buffer and clear excess bufferage. */ 4872 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4873 if (rc < 0) 4874 goto discard_data; 4875 4876 server->total_read += rc; 4877 if (rc < len) { 4878 struct iov_iter tmp = iter; 4879 4880 iov_iter_advance(&tmp, rc); 4881 iov_iter_zero(len - rc, &tmp); 4882 } 4883 iov_iter_truncate(&iter, dw->len); 4884 4885 rc = cifs_discard_remaining_data(server); 4886 if (rc) 4887 goto free_pages; 4888 4889 /* 4890 * For large reads, offload to different thread for better performance, 4891 * use more cores decrypting which can be expensive 4892 */ 4893 4894 if ((server->min_offload) && (server->in_flight > 1) && 4895 (server->pdu_size >= server->min_offload)) { 4896 dw->buf = server->smallbuf; 4897 server->smallbuf = (char *)cifs_small_buf_get(); 4898 4899 queue_work(decrypt_wq, &dw->decrypt); 4900 *num_mids = 0; /* worker thread takes care of finding mid */ 4901 return -1; 4902 } 4903 4904 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4905 &iter, false); 4906 if (rc) 4907 goto free_pages; 4908 4909 *mid = smb2_find_mid(server, buf); 4910 if (*mid == NULL) { 4911 cifs_dbg(FYI, "mid not found\n"); 4912 } else { 4913 cifs_dbg(FYI, "mid found\n"); 4914 (*mid)->decrypted = true; 4915 rc = handle_read_data(server, *mid, buf, 4916 server->vals->read_rsp_size, 4917 dw->buffer, dw->len, false); 4918 if (rc >= 0) { 4919 if (server->ops->is_network_name_deleted) { 4920 server->ops->is_network_name_deleted(buf, 4921 server); 4922 } 4923 } 4924 } 4925 4926 free_pages: 4927 cifs_clear_folioq_buffer(dw->buffer); 4928 free_dw: 4929 kfree(dw); 4930 return rc; 4931 discard_data: 4932 cifs_discard_remaining_data(server); 4933 goto free_pages; 4934 } 4935 4936 static int 4937 receive_encrypted_standard(struct TCP_Server_Info *server, 4938 struct mid_q_entry **mids, char **bufs, 4939 int *num_mids) 4940 { 4941 int ret, length; 4942 char *buf = server->smallbuf; 4943 struct smb2_hdr *shdr; 4944 unsigned int pdu_length = server->pdu_size; 4945 unsigned int buf_size; 4946 unsigned int next_cmd; 4947 struct mid_q_entry *mid_entry; 4948 int next_is_large; 4949 char *next_buffer = NULL; 4950 4951 *num_mids = 0; 4952 4953 /* switch to large buffer if too big for a small one */ 4954 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4955 server->large_buf = true; 4956 memcpy(server->bigbuf, buf, server->total_read); 4957 buf = server->bigbuf; 4958 } 4959 4960 /* now read the rest */ 4961 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4962 pdu_length - HEADER_SIZE(server) + 1); 4963 if (length < 0) 4964 return length; 4965 server->total_read += length; 4966 4967 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4968 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4969 if (length) 4970 return length; 4971 4972 next_is_large = server->large_buf; 4973 one_more: 4974 shdr = (struct smb2_hdr *)buf; 4975 next_cmd = le32_to_cpu(shdr->NextCommand); 4976 if (next_cmd) { 4977 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4978 return -1; 4979 if (next_is_large) 4980 next_buffer = (char *)cifs_buf_get(); 4981 else 4982 next_buffer = (char *)cifs_small_buf_get(); 4983 if (!next_buffer) { 4984 cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); 4985 return -1; 4986 } 4987 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4988 } 4989 4990 mid_entry = smb2_find_mid(server, buf); 4991 if (mid_entry == NULL) 4992 cifs_dbg(FYI, "mid not found\n"); 4993 else { 4994 cifs_dbg(FYI, "mid found\n"); 4995 mid_entry->decrypted = true; 4996 mid_entry->resp_buf_size = server->pdu_size; 4997 } 4998 4999 if (*num_mids >= MAX_COMPOUND) { 5000 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5001 return -1; 5002 } 5003 bufs[*num_mids] = buf; 5004 mids[(*num_mids)++] = mid_entry; 5005 5006 if (mid_entry && mid_entry->handle) 5007 ret = mid_entry->handle(server, mid_entry); 5008 else 5009 ret = cifs_handle_standard(server, mid_entry); 5010 5011 if (ret == 0 && next_cmd) { 5012 pdu_length -= next_cmd; 5013 server->large_buf = next_is_large; 5014 if (next_is_large) 5015 server->bigbuf = buf = next_buffer; 5016 else 5017 server->smallbuf = buf = next_buffer; 5018 goto one_more; 5019 } else if (ret != 0) { 5020 /* 5021 * ret != 0 here means that we didn't get to handle_mid() thus 5022 * server->smallbuf and server->bigbuf are still valid. We need 5023 * to free next_buffer because it is not going to be used 5024 * anywhere. 5025 */ 5026 if (next_is_large) 5027 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5028 else 5029 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5030 } 5031 5032 return ret; 5033 } 5034 5035 static int 5036 smb3_receive_transform(struct TCP_Server_Info *server, 5037 struct mid_q_entry **mids, char **bufs, int *num_mids) 5038 { 5039 char *buf = server->smallbuf; 5040 unsigned int pdu_length = server->pdu_size; 5041 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5042 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5043 5044 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5045 sizeof(struct smb2_hdr)) { 5046 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5047 pdu_length); 5048 cifs_reconnect(server, true); 5049 return -ECONNABORTED; 5050 } 5051 5052 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5053 cifs_server_dbg(VFS, "Transform message is broken\n"); 5054 cifs_reconnect(server, true); 5055 return -ECONNABORTED; 5056 } 5057 5058 /* TODO: add support for compounds containing READ. */ 5059 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5060 return receive_encrypted_read(server, &mids[0], num_mids); 5061 } 5062 5063 return receive_encrypted_standard(server, mids, bufs, num_mids); 5064 } 5065 5066 int 5067 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5068 { 5069 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5070 5071 return handle_read_data(server, mid, buf, server->pdu_size, 5072 NULL, 0, false); 5073 } 5074 5075 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5076 unsigned int *noff) 5077 { 5078 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5079 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5080 5081 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5082 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5083 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5084 return -EINVAL; 5085 } else { 5086 *noff = le32_to_cpu(hdr->NextCommand); 5087 } 5088 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5089 return -EINVAL; 5090 return 0; 5091 } 5092 5093 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5094 struct dentry *dentry, struct cifs_tcon *tcon, 5095 const char *full_path, umode_t mode, dev_t dev, 5096 const char *symname) 5097 { 5098 struct TCP_Server_Info *server = tcon->ses->server; 5099 struct cifs_open_parms oparms; 5100 struct cifs_open_info_data idata; 5101 struct cifs_io_parms io_parms = {}; 5102 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5103 struct cifs_fid fid; 5104 unsigned int bytes_written; 5105 u8 type[8]; 5106 int type_len = 0; 5107 struct { 5108 __le64 major; 5109 __le64 minor; 5110 } __packed pdev = {}; 5111 __le16 *symname_utf16 = NULL; 5112 u8 *data = NULL; 5113 int data_len = 0; 5114 struct kvec iov[3]; 5115 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5116 int rc; 5117 5118 switch (mode & S_IFMT) { 5119 case S_IFCHR: 5120 type_len = 8; 5121 memcpy(type, "IntxCHR\0", type_len); 5122 pdev.major = cpu_to_le64(MAJOR(dev)); 5123 pdev.minor = cpu_to_le64(MINOR(dev)); 5124 data = (u8 *)&pdev; 5125 data_len = sizeof(pdev); 5126 break; 5127 case S_IFBLK: 5128 type_len = 8; 5129 memcpy(type, "IntxBLK\0", type_len); 5130 pdev.major = cpu_to_le64(MAJOR(dev)); 5131 pdev.minor = cpu_to_le64(MINOR(dev)); 5132 data = (u8 *)&pdev; 5133 data_len = sizeof(pdev); 5134 break; 5135 case S_IFLNK: 5136 type_len = 8; 5137 memcpy(type, "IntxLNK\1", type_len); 5138 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname), 5139 &data_len, cifs_sb->local_nls, 5140 NO_MAP_UNI_RSVD); 5141 if (!symname_utf16) { 5142 rc = -ENOMEM; 5143 goto out; 5144 } 5145 data_len -= 2; /* symlink is without trailing wide-nul */ 5146 data = (u8 *)symname_utf16; 5147 break; 5148 case S_IFSOCK: 5149 type_len = 8; 5150 strscpy(type, "LnxSOCK"); 5151 data = (u8 *)&pdev; 5152 data_len = sizeof(pdev); 5153 break; 5154 case S_IFIFO: 5155 type_len = 8; 5156 strscpy(type, "LnxFIFO"); 5157 data = (u8 *)&pdev; 5158 data_len = sizeof(pdev); 5159 break; 5160 default: 5161 rc = -EPERM; 5162 goto out; 5163 } 5164 5165 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5166 FILE_CREATE, CREATE_NOT_DIR | 5167 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5168 oparms.fid = &fid; 5169 idata.contains_posix_file_info = false; 5170 rc = server->ops->open(xid, &oparms, &oplock, &idata); 5171 if (rc) 5172 goto out; 5173 5174 /* 5175 * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL 5176 * option. If not then server does not support ATTR_SYSTEM and newly 5177 * created file is not SFU compatible, which means that the call failed. 5178 */ 5179 if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) { 5180 rc = -EOPNOTSUPP; 5181 goto out_close; 5182 } 5183 5184 if (type_len + data_len > 0) { 5185 io_parms.pid = current->tgid; 5186 io_parms.tcon = tcon; 5187 io_parms.length = type_len + data_len; 5188 iov[1].iov_base = type; 5189 iov[1].iov_len = type_len; 5190 iov[2].iov_base = data; 5191 iov[2].iov_len = data_len; 5192 5193 rc = server->ops->sync_write(xid, &fid, &io_parms, 5194 &bytes_written, 5195 iov, ARRAY_SIZE(iov)-1); 5196 } 5197 5198 out_close: 5199 server->ops->close(xid, tcon, &fid); 5200 5201 /* 5202 * If CREATE was successful but either setting ATTR_SYSTEM failed or 5203 * writing type/data information failed then remove the intermediate 5204 * object created by CREATE. Otherwise intermediate empty object stay 5205 * on the server. 5206 */ 5207 if (rc) 5208 server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL); 5209 5210 out: 5211 kfree(symname_utf16); 5212 return rc; 5213 } 5214 5215 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5216 struct dentry *dentry, struct cifs_tcon *tcon, 5217 const char *full_path, umode_t mode, dev_t dev) 5218 { 5219 struct inode *new = NULL; 5220 int rc; 5221 5222 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5223 full_path, mode, dev, NULL); 5224 if (rc) 5225 return rc; 5226 5227 if (tcon->posix_extensions) { 5228 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5229 inode->i_sb, xid); 5230 } else if (tcon->unix_ext) { 5231 rc = cifs_get_inode_info_unix(&new, full_path, 5232 inode->i_sb, xid); 5233 } else { 5234 rc = cifs_get_inode_info(&new, full_path, NULL, 5235 inode->i_sb, xid, NULL); 5236 } 5237 if (!rc) 5238 d_instantiate(dentry, new); 5239 return rc; 5240 } 5241 5242 static int smb2_make_node(unsigned int xid, struct inode *inode, 5243 struct dentry *dentry, struct cifs_tcon *tcon, 5244 const char *full_path, umode_t mode, dev_t dev) 5245 { 5246 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5247 int rc = -EOPNOTSUPP; 5248 5249 /* 5250 * Check if mounted with mount parm 'sfu' mount parm. 5251 * SFU emulation should work with all servers, but only 5252 * supports block and char device, socket & fifo, 5253 * and was used by default in earlier versions of Windows 5254 */ 5255 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5256 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5257 full_path, mode, dev); 5258 } else if (le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS) { 5259 rc = smb2_mknod_reparse(xid, inode, dentry, tcon, 5260 full_path, mode, dev); 5261 } 5262 return rc; 5263 } 5264 5265 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5266 struct smb_version_operations smb20_operations = { 5267 .compare_fids = smb2_compare_fids, 5268 .setup_request = smb2_setup_request, 5269 .setup_async_request = smb2_setup_async_request, 5270 .check_receive = smb2_check_receive, 5271 .add_credits = smb2_add_credits, 5272 .set_credits = smb2_set_credits, 5273 .get_credits_field = smb2_get_credits_field, 5274 .get_credits = smb2_get_credits, 5275 .wait_mtu_credits = cifs_wait_mtu_credits, 5276 .get_next_mid = smb2_get_next_mid, 5277 .revert_current_mid = smb2_revert_current_mid, 5278 .read_data_offset = smb2_read_data_offset, 5279 .read_data_length = smb2_read_data_length, 5280 .map_error = map_smb2_to_linux_error, 5281 .find_mid = smb2_find_mid, 5282 .check_message = smb2_check_message, 5283 .dump_detail = smb2_dump_detail, 5284 .clear_stats = smb2_clear_stats, 5285 .print_stats = smb2_print_stats, 5286 .is_oplock_break = smb2_is_valid_oplock_break, 5287 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5288 .downgrade_oplock = smb2_downgrade_oplock, 5289 .need_neg = smb2_need_neg, 5290 .negotiate = smb2_negotiate, 5291 .negotiate_wsize = smb2_negotiate_wsize, 5292 .negotiate_rsize = smb2_negotiate_rsize, 5293 .sess_setup = SMB2_sess_setup, 5294 .logoff = SMB2_logoff, 5295 .tree_connect = SMB2_tcon, 5296 .tree_disconnect = SMB2_tdis, 5297 .qfs_tcon = smb2_qfs_tcon, 5298 .is_path_accessible = smb2_is_path_accessible, 5299 .can_echo = smb2_can_echo, 5300 .echo = SMB2_echo, 5301 .query_path_info = smb2_query_path_info, 5302 .query_reparse_point = smb2_query_reparse_point, 5303 .get_srv_inum = smb2_get_srv_inum, 5304 .query_file_info = smb2_query_file_info, 5305 .set_path_size = smb2_set_path_size, 5306 .set_file_size = smb2_set_file_size, 5307 .set_file_info = smb2_set_file_info, 5308 .set_compression = smb2_set_compression, 5309 .mkdir = smb2_mkdir, 5310 .mkdir_setinfo = smb2_mkdir_setinfo, 5311 .rmdir = smb2_rmdir, 5312 .unlink = smb2_unlink, 5313 .rename = smb2_rename_path, 5314 .create_hardlink = smb2_create_hardlink, 5315 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5316 .query_mf_symlink = smb3_query_mf_symlink, 5317 .create_mf_symlink = smb3_create_mf_symlink, 5318 .create_reparse_symlink = smb2_create_reparse_symlink, 5319 .open = smb2_open_file, 5320 .set_fid = smb2_set_fid, 5321 .close = smb2_close_file, 5322 .flush = smb2_flush_file, 5323 .async_readv = smb2_async_readv, 5324 .async_writev = smb2_async_writev, 5325 .sync_read = smb2_sync_read, 5326 .sync_write = smb2_sync_write, 5327 .query_dir_first = smb2_query_dir_first, 5328 .query_dir_next = smb2_query_dir_next, 5329 .close_dir = smb2_close_dir, 5330 .calc_smb_size = smb2_calc_size, 5331 .is_status_pending = smb2_is_status_pending, 5332 .is_session_expired = smb2_is_session_expired, 5333 .oplock_response = smb2_oplock_response, 5334 .queryfs = smb2_queryfs, 5335 .mand_lock = smb2_mand_lock, 5336 .mand_unlock_range = smb2_unlock_range, 5337 .push_mand_locks = smb2_push_mandatory_locks, 5338 .get_lease_key = smb2_get_lease_key, 5339 .set_lease_key = smb2_set_lease_key, 5340 .new_lease_key = smb2_new_lease_key, 5341 .calc_signature = smb2_calc_signature, 5342 .is_read_op = smb2_is_read_op, 5343 .set_oplock_level = smb2_set_oplock_level, 5344 .create_lease_buf = smb2_create_lease_buf, 5345 .parse_lease_buf = smb2_parse_lease_buf, 5346 .copychunk_range = smb2_copychunk_range, 5347 .wp_retry_size = smb2_wp_retry_size, 5348 .dir_needs_close = smb2_dir_needs_close, 5349 .get_dfs_refer = smb2_get_dfs_refer, 5350 .select_sectype = smb2_select_sectype, 5351 #ifdef CONFIG_CIFS_XATTR 5352 .query_all_EAs = smb2_query_eas, 5353 .set_EA = smb2_set_ea, 5354 #endif /* CIFS_XATTR */ 5355 .get_acl = get_smb2_acl, 5356 .get_acl_by_fid = get_smb2_acl_by_fid, 5357 .set_acl = set_smb2_acl, 5358 .next_header = smb2_next_header, 5359 .ioctl_query_info = smb2_ioctl_query_info, 5360 .make_node = smb2_make_node, 5361 .fiemap = smb3_fiemap, 5362 .llseek = smb3_llseek, 5363 .is_status_io_timeout = smb2_is_status_io_timeout, 5364 .is_network_name_deleted = smb2_is_network_name_deleted, 5365 }; 5366 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5367 5368 struct smb_version_operations smb21_operations = { 5369 .compare_fids = smb2_compare_fids, 5370 .setup_request = smb2_setup_request, 5371 .setup_async_request = smb2_setup_async_request, 5372 .check_receive = smb2_check_receive, 5373 .add_credits = smb2_add_credits, 5374 .set_credits = smb2_set_credits, 5375 .get_credits_field = smb2_get_credits_field, 5376 .get_credits = smb2_get_credits, 5377 .wait_mtu_credits = smb2_wait_mtu_credits, 5378 .adjust_credits = smb2_adjust_credits, 5379 .get_next_mid = smb2_get_next_mid, 5380 .revert_current_mid = smb2_revert_current_mid, 5381 .read_data_offset = smb2_read_data_offset, 5382 .read_data_length = smb2_read_data_length, 5383 .map_error = map_smb2_to_linux_error, 5384 .find_mid = smb2_find_mid, 5385 .check_message = smb2_check_message, 5386 .dump_detail = smb2_dump_detail, 5387 .clear_stats = smb2_clear_stats, 5388 .print_stats = smb2_print_stats, 5389 .is_oplock_break = smb2_is_valid_oplock_break, 5390 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5391 .downgrade_oplock = smb2_downgrade_oplock, 5392 .need_neg = smb2_need_neg, 5393 .negotiate = smb2_negotiate, 5394 .negotiate_wsize = smb2_negotiate_wsize, 5395 .negotiate_rsize = smb2_negotiate_rsize, 5396 .sess_setup = SMB2_sess_setup, 5397 .logoff = SMB2_logoff, 5398 .tree_connect = SMB2_tcon, 5399 .tree_disconnect = SMB2_tdis, 5400 .qfs_tcon = smb2_qfs_tcon, 5401 .is_path_accessible = smb2_is_path_accessible, 5402 .can_echo = smb2_can_echo, 5403 .echo = SMB2_echo, 5404 .query_path_info = smb2_query_path_info, 5405 .query_reparse_point = smb2_query_reparse_point, 5406 .get_srv_inum = smb2_get_srv_inum, 5407 .query_file_info = smb2_query_file_info, 5408 .set_path_size = smb2_set_path_size, 5409 .set_file_size = smb2_set_file_size, 5410 .set_file_info = smb2_set_file_info, 5411 .set_compression = smb2_set_compression, 5412 .mkdir = smb2_mkdir, 5413 .mkdir_setinfo = smb2_mkdir_setinfo, 5414 .rmdir = smb2_rmdir, 5415 .unlink = smb2_unlink, 5416 .rename = smb2_rename_path, 5417 .create_hardlink = smb2_create_hardlink, 5418 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5419 .query_mf_symlink = smb3_query_mf_symlink, 5420 .create_mf_symlink = smb3_create_mf_symlink, 5421 .create_reparse_symlink = smb2_create_reparse_symlink, 5422 .open = smb2_open_file, 5423 .set_fid = smb2_set_fid, 5424 .close = smb2_close_file, 5425 .flush = smb2_flush_file, 5426 .async_readv = smb2_async_readv, 5427 .async_writev = smb2_async_writev, 5428 .sync_read = smb2_sync_read, 5429 .sync_write = smb2_sync_write, 5430 .query_dir_first = smb2_query_dir_first, 5431 .query_dir_next = smb2_query_dir_next, 5432 .close_dir = smb2_close_dir, 5433 .calc_smb_size = smb2_calc_size, 5434 .is_status_pending = smb2_is_status_pending, 5435 .is_session_expired = smb2_is_session_expired, 5436 .oplock_response = smb2_oplock_response, 5437 .queryfs = smb2_queryfs, 5438 .mand_lock = smb2_mand_lock, 5439 .mand_unlock_range = smb2_unlock_range, 5440 .push_mand_locks = smb2_push_mandatory_locks, 5441 .get_lease_key = smb2_get_lease_key, 5442 .set_lease_key = smb2_set_lease_key, 5443 .new_lease_key = smb2_new_lease_key, 5444 .calc_signature = smb2_calc_signature, 5445 .is_read_op = smb21_is_read_op, 5446 .set_oplock_level = smb21_set_oplock_level, 5447 .create_lease_buf = smb2_create_lease_buf, 5448 .parse_lease_buf = smb2_parse_lease_buf, 5449 .copychunk_range = smb2_copychunk_range, 5450 .wp_retry_size = smb2_wp_retry_size, 5451 .dir_needs_close = smb2_dir_needs_close, 5452 .enum_snapshots = smb3_enum_snapshots, 5453 .notify = smb3_notify, 5454 .get_dfs_refer = smb2_get_dfs_refer, 5455 .select_sectype = smb2_select_sectype, 5456 #ifdef CONFIG_CIFS_XATTR 5457 .query_all_EAs = smb2_query_eas, 5458 .set_EA = smb2_set_ea, 5459 #endif /* CIFS_XATTR */ 5460 .get_acl = get_smb2_acl, 5461 .get_acl_by_fid = get_smb2_acl_by_fid, 5462 .set_acl = set_smb2_acl, 5463 .next_header = smb2_next_header, 5464 .ioctl_query_info = smb2_ioctl_query_info, 5465 .make_node = smb2_make_node, 5466 .fiemap = smb3_fiemap, 5467 .llseek = smb3_llseek, 5468 .is_status_io_timeout = smb2_is_status_io_timeout, 5469 .is_network_name_deleted = smb2_is_network_name_deleted, 5470 }; 5471 5472 struct smb_version_operations smb30_operations = { 5473 .compare_fids = smb2_compare_fids, 5474 .setup_request = smb2_setup_request, 5475 .setup_async_request = smb2_setup_async_request, 5476 .check_receive = smb2_check_receive, 5477 .add_credits = smb2_add_credits, 5478 .set_credits = smb2_set_credits, 5479 .get_credits_field = smb2_get_credits_field, 5480 .get_credits = smb2_get_credits, 5481 .wait_mtu_credits = smb2_wait_mtu_credits, 5482 .adjust_credits = smb2_adjust_credits, 5483 .get_next_mid = smb2_get_next_mid, 5484 .revert_current_mid = smb2_revert_current_mid, 5485 .read_data_offset = smb2_read_data_offset, 5486 .read_data_length = smb2_read_data_length, 5487 .map_error = map_smb2_to_linux_error, 5488 .find_mid = smb2_find_mid, 5489 .check_message = smb2_check_message, 5490 .dump_detail = smb2_dump_detail, 5491 .clear_stats = smb2_clear_stats, 5492 .print_stats = smb2_print_stats, 5493 .dump_share_caps = smb2_dump_share_caps, 5494 .is_oplock_break = smb2_is_valid_oplock_break, 5495 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5496 .downgrade_oplock = smb3_downgrade_oplock, 5497 .need_neg = smb2_need_neg, 5498 .negotiate = smb2_negotiate, 5499 .negotiate_wsize = smb3_negotiate_wsize, 5500 .negotiate_rsize = smb3_negotiate_rsize, 5501 .sess_setup = SMB2_sess_setup, 5502 .logoff = SMB2_logoff, 5503 .tree_connect = SMB2_tcon, 5504 .tree_disconnect = SMB2_tdis, 5505 .qfs_tcon = smb3_qfs_tcon, 5506 .query_server_interfaces = SMB3_request_interfaces, 5507 .is_path_accessible = smb2_is_path_accessible, 5508 .can_echo = smb2_can_echo, 5509 .echo = SMB2_echo, 5510 .query_path_info = smb2_query_path_info, 5511 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5512 .query_reparse_point = smb2_query_reparse_point, 5513 .get_srv_inum = smb2_get_srv_inum, 5514 .query_file_info = smb2_query_file_info, 5515 .set_path_size = smb2_set_path_size, 5516 .set_file_size = smb2_set_file_size, 5517 .set_file_info = smb2_set_file_info, 5518 .set_compression = smb2_set_compression, 5519 .mkdir = smb2_mkdir, 5520 .mkdir_setinfo = smb2_mkdir_setinfo, 5521 .rmdir = smb2_rmdir, 5522 .unlink = smb2_unlink, 5523 .rename = smb2_rename_path, 5524 .create_hardlink = smb2_create_hardlink, 5525 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5526 .query_mf_symlink = smb3_query_mf_symlink, 5527 .create_mf_symlink = smb3_create_mf_symlink, 5528 .create_reparse_symlink = smb2_create_reparse_symlink, 5529 .open = smb2_open_file, 5530 .set_fid = smb2_set_fid, 5531 .close = smb2_close_file, 5532 .close_getattr = smb2_close_getattr, 5533 .flush = smb2_flush_file, 5534 .async_readv = smb2_async_readv, 5535 .async_writev = smb2_async_writev, 5536 .sync_read = smb2_sync_read, 5537 .sync_write = smb2_sync_write, 5538 .query_dir_first = smb2_query_dir_first, 5539 .query_dir_next = smb2_query_dir_next, 5540 .close_dir = smb2_close_dir, 5541 .calc_smb_size = smb2_calc_size, 5542 .is_status_pending = smb2_is_status_pending, 5543 .is_session_expired = smb2_is_session_expired, 5544 .oplock_response = smb2_oplock_response, 5545 .queryfs = smb2_queryfs, 5546 .mand_lock = smb2_mand_lock, 5547 .mand_unlock_range = smb2_unlock_range, 5548 .push_mand_locks = smb2_push_mandatory_locks, 5549 .get_lease_key = smb2_get_lease_key, 5550 .set_lease_key = smb2_set_lease_key, 5551 .new_lease_key = smb2_new_lease_key, 5552 .generate_signingkey = generate_smb30signingkey, 5553 .calc_signature = smb3_calc_signature, 5554 .set_integrity = smb3_set_integrity, 5555 .is_read_op = smb21_is_read_op, 5556 .set_oplock_level = smb3_set_oplock_level, 5557 .create_lease_buf = smb3_create_lease_buf, 5558 .parse_lease_buf = smb3_parse_lease_buf, 5559 .copychunk_range = smb2_copychunk_range, 5560 .duplicate_extents = smb2_duplicate_extents, 5561 .validate_negotiate = smb3_validate_negotiate, 5562 .wp_retry_size = smb2_wp_retry_size, 5563 .dir_needs_close = smb2_dir_needs_close, 5564 .fallocate = smb3_fallocate, 5565 .enum_snapshots = smb3_enum_snapshots, 5566 .notify = smb3_notify, 5567 .init_transform_rq = smb3_init_transform_rq, 5568 .is_transform_hdr = smb3_is_transform_hdr, 5569 .receive_transform = smb3_receive_transform, 5570 .get_dfs_refer = smb2_get_dfs_refer, 5571 .select_sectype = smb2_select_sectype, 5572 #ifdef CONFIG_CIFS_XATTR 5573 .query_all_EAs = smb2_query_eas, 5574 .set_EA = smb2_set_ea, 5575 #endif /* CIFS_XATTR */ 5576 .get_acl = get_smb2_acl, 5577 .get_acl_by_fid = get_smb2_acl_by_fid, 5578 .set_acl = set_smb2_acl, 5579 .next_header = smb2_next_header, 5580 .ioctl_query_info = smb2_ioctl_query_info, 5581 .make_node = smb2_make_node, 5582 .fiemap = smb3_fiemap, 5583 .llseek = smb3_llseek, 5584 .is_status_io_timeout = smb2_is_status_io_timeout, 5585 .is_network_name_deleted = smb2_is_network_name_deleted, 5586 }; 5587 5588 struct smb_version_operations smb311_operations = { 5589 .compare_fids = smb2_compare_fids, 5590 .setup_request = smb2_setup_request, 5591 .setup_async_request = smb2_setup_async_request, 5592 .check_receive = smb2_check_receive, 5593 .add_credits = smb2_add_credits, 5594 .set_credits = smb2_set_credits, 5595 .get_credits_field = smb2_get_credits_field, 5596 .get_credits = smb2_get_credits, 5597 .wait_mtu_credits = smb2_wait_mtu_credits, 5598 .adjust_credits = smb2_adjust_credits, 5599 .get_next_mid = smb2_get_next_mid, 5600 .revert_current_mid = smb2_revert_current_mid, 5601 .read_data_offset = smb2_read_data_offset, 5602 .read_data_length = smb2_read_data_length, 5603 .map_error = map_smb2_to_linux_error, 5604 .find_mid = smb2_find_mid, 5605 .check_message = smb2_check_message, 5606 .dump_detail = smb2_dump_detail, 5607 .clear_stats = smb2_clear_stats, 5608 .print_stats = smb2_print_stats, 5609 .dump_share_caps = smb2_dump_share_caps, 5610 .is_oplock_break = smb2_is_valid_oplock_break, 5611 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5612 .downgrade_oplock = smb3_downgrade_oplock, 5613 .need_neg = smb2_need_neg, 5614 .negotiate = smb2_negotiate, 5615 .negotiate_wsize = smb3_negotiate_wsize, 5616 .negotiate_rsize = smb3_negotiate_rsize, 5617 .sess_setup = SMB2_sess_setup, 5618 .logoff = SMB2_logoff, 5619 .tree_connect = SMB2_tcon, 5620 .tree_disconnect = SMB2_tdis, 5621 .qfs_tcon = smb3_qfs_tcon, 5622 .query_server_interfaces = SMB3_request_interfaces, 5623 .is_path_accessible = smb2_is_path_accessible, 5624 .can_echo = smb2_can_echo, 5625 .echo = SMB2_echo, 5626 .query_path_info = smb2_query_path_info, 5627 .query_reparse_point = smb2_query_reparse_point, 5628 .get_srv_inum = smb2_get_srv_inum, 5629 .query_file_info = smb2_query_file_info, 5630 .set_path_size = smb2_set_path_size, 5631 .set_file_size = smb2_set_file_size, 5632 .set_file_info = smb2_set_file_info, 5633 .set_compression = smb2_set_compression, 5634 .mkdir = smb2_mkdir, 5635 .mkdir_setinfo = smb2_mkdir_setinfo, 5636 .posix_mkdir = smb311_posix_mkdir, 5637 .rmdir = smb2_rmdir, 5638 .unlink = smb2_unlink, 5639 .rename = smb2_rename_path, 5640 .create_hardlink = smb2_create_hardlink, 5641 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5642 .query_mf_symlink = smb3_query_mf_symlink, 5643 .create_mf_symlink = smb3_create_mf_symlink, 5644 .create_reparse_symlink = smb2_create_reparse_symlink, 5645 .open = smb2_open_file, 5646 .set_fid = smb2_set_fid, 5647 .close = smb2_close_file, 5648 .close_getattr = smb2_close_getattr, 5649 .flush = smb2_flush_file, 5650 .async_readv = smb2_async_readv, 5651 .async_writev = smb2_async_writev, 5652 .sync_read = smb2_sync_read, 5653 .sync_write = smb2_sync_write, 5654 .query_dir_first = smb2_query_dir_first, 5655 .query_dir_next = smb2_query_dir_next, 5656 .close_dir = smb2_close_dir, 5657 .calc_smb_size = smb2_calc_size, 5658 .is_status_pending = smb2_is_status_pending, 5659 .is_session_expired = smb2_is_session_expired, 5660 .oplock_response = smb2_oplock_response, 5661 .queryfs = smb311_queryfs, 5662 .mand_lock = smb2_mand_lock, 5663 .mand_unlock_range = smb2_unlock_range, 5664 .push_mand_locks = smb2_push_mandatory_locks, 5665 .get_lease_key = smb2_get_lease_key, 5666 .set_lease_key = smb2_set_lease_key, 5667 .new_lease_key = smb2_new_lease_key, 5668 .generate_signingkey = generate_smb311signingkey, 5669 .calc_signature = smb3_calc_signature, 5670 .set_integrity = smb3_set_integrity, 5671 .is_read_op = smb21_is_read_op, 5672 .set_oplock_level = smb3_set_oplock_level, 5673 .create_lease_buf = smb3_create_lease_buf, 5674 .parse_lease_buf = smb3_parse_lease_buf, 5675 .copychunk_range = smb2_copychunk_range, 5676 .duplicate_extents = smb2_duplicate_extents, 5677 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5678 .wp_retry_size = smb2_wp_retry_size, 5679 .dir_needs_close = smb2_dir_needs_close, 5680 .fallocate = smb3_fallocate, 5681 .enum_snapshots = smb3_enum_snapshots, 5682 .notify = smb3_notify, 5683 .init_transform_rq = smb3_init_transform_rq, 5684 .is_transform_hdr = smb3_is_transform_hdr, 5685 .receive_transform = smb3_receive_transform, 5686 .get_dfs_refer = smb2_get_dfs_refer, 5687 .select_sectype = smb2_select_sectype, 5688 #ifdef CONFIG_CIFS_XATTR 5689 .query_all_EAs = smb2_query_eas, 5690 .set_EA = smb2_set_ea, 5691 #endif /* CIFS_XATTR */ 5692 .get_acl = get_smb2_acl, 5693 .get_acl_by_fid = get_smb2_acl_by_fid, 5694 .set_acl = set_smb2_acl, 5695 .next_header = smb2_next_header, 5696 .ioctl_query_info = smb2_ioctl_query_info, 5697 .make_node = smb2_make_node, 5698 .fiemap = smb3_fiemap, 5699 .llseek = smb3_llseek, 5700 .is_status_io_timeout = smb2_is_status_io_timeout, 5701 .is_network_name_deleted = smb2_is_network_name_deleted, 5702 }; 5703 5704 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5705 struct smb_version_values smb20_values = { 5706 .version_string = SMB20_VERSION_STRING, 5707 .protocol_id = SMB20_PROT_ID, 5708 .req_capabilities = 0, /* MBZ */ 5709 .large_lock_type = 0, 5710 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5711 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5712 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5713 .header_size = sizeof(struct smb2_hdr), 5714 .header_preamble_size = 0, 5715 .max_header_size = MAX_SMB2_HDR_SIZE, 5716 .read_rsp_size = sizeof(struct smb2_read_rsp), 5717 .lock_cmd = SMB2_LOCK, 5718 .cap_unix = 0, 5719 .cap_nt_find = SMB2_NT_FIND, 5720 .cap_large_files = SMB2_LARGE_FILES, 5721 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5722 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5723 .create_lease_size = sizeof(struct create_lease), 5724 }; 5725 #endif /* ALLOW_INSECURE_LEGACY */ 5726 5727 struct smb_version_values smb21_values = { 5728 .version_string = SMB21_VERSION_STRING, 5729 .protocol_id = SMB21_PROT_ID, 5730 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5731 .large_lock_type = 0, 5732 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5733 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5734 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5735 .header_size = sizeof(struct smb2_hdr), 5736 .header_preamble_size = 0, 5737 .max_header_size = MAX_SMB2_HDR_SIZE, 5738 .read_rsp_size = sizeof(struct smb2_read_rsp), 5739 .lock_cmd = SMB2_LOCK, 5740 .cap_unix = 0, 5741 .cap_nt_find = SMB2_NT_FIND, 5742 .cap_large_files = SMB2_LARGE_FILES, 5743 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5744 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5745 .create_lease_size = sizeof(struct create_lease), 5746 }; 5747 5748 struct smb_version_values smb3any_values = { 5749 .version_string = SMB3ANY_VERSION_STRING, 5750 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5751 .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, 5752 .large_lock_type = 0, 5753 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5754 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5755 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5756 .header_size = sizeof(struct smb2_hdr), 5757 .header_preamble_size = 0, 5758 .max_header_size = MAX_SMB2_HDR_SIZE, 5759 .read_rsp_size = sizeof(struct smb2_read_rsp), 5760 .lock_cmd = SMB2_LOCK, 5761 .cap_unix = 0, 5762 .cap_nt_find = SMB2_NT_FIND, 5763 .cap_large_files = SMB2_LARGE_FILES, 5764 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5765 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5766 .create_lease_size = sizeof(struct create_lease_v2), 5767 }; 5768 5769 struct smb_version_values smbdefault_values = { 5770 .version_string = SMBDEFAULT_VERSION_STRING, 5771 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5772 .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, 5773 .large_lock_type = 0, 5774 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5775 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5776 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5777 .header_size = sizeof(struct smb2_hdr), 5778 .header_preamble_size = 0, 5779 .max_header_size = MAX_SMB2_HDR_SIZE, 5780 .read_rsp_size = sizeof(struct smb2_read_rsp), 5781 .lock_cmd = SMB2_LOCK, 5782 .cap_unix = 0, 5783 .cap_nt_find = SMB2_NT_FIND, 5784 .cap_large_files = SMB2_LARGE_FILES, 5785 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5786 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5787 .create_lease_size = sizeof(struct create_lease_v2), 5788 }; 5789 5790 struct smb_version_values smb30_values = { 5791 .version_string = SMB30_VERSION_STRING, 5792 .protocol_id = SMB30_PROT_ID, 5793 .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, 5794 .large_lock_type = 0, 5795 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5796 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5797 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5798 .header_size = sizeof(struct smb2_hdr), 5799 .header_preamble_size = 0, 5800 .max_header_size = MAX_SMB2_HDR_SIZE, 5801 .read_rsp_size = sizeof(struct smb2_read_rsp), 5802 .lock_cmd = SMB2_LOCK, 5803 .cap_unix = 0, 5804 .cap_nt_find = SMB2_NT_FIND, 5805 .cap_large_files = SMB2_LARGE_FILES, 5806 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5807 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5808 .create_lease_size = sizeof(struct create_lease_v2), 5809 }; 5810 5811 struct smb_version_values smb302_values = { 5812 .version_string = SMB302_VERSION_STRING, 5813 .protocol_id = SMB302_PROT_ID, 5814 .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, 5815 .large_lock_type = 0, 5816 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5817 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5818 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5819 .header_size = sizeof(struct smb2_hdr), 5820 .header_preamble_size = 0, 5821 .max_header_size = MAX_SMB2_HDR_SIZE, 5822 .read_rsp_size = sizeof(struct smb2_read_rsp), 5823 .lock_cmd = SMB2_LOCK, 5824 .cap_unix = 0, 5825 .cap_nt_find = SMB2_NT_FIND, 5826 .cap_large_files = SMB2_LARGE_FILES, 5827 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5828 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5829 .create_lease_size = sizeof(struct create_lease_v2), 5830 }; 5831 5832 struct smb_version_values smb311_values = { 5833 .version_string = SMB311_VERSION_STRING, 5834 .protocol_id = SMB311_PROT_ID, 5835 .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, 5836 .large_lock_type = 0, 5837 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5838 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5839 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5840 .header_size = sizeof(struct smb2_hdr), 5841 .header_preamble_size = 0, 5842 .max_header_size = MAX_SMB2_HDR_SIZE, 5843 .read_rsp_size = sizeof(struct smb2_read_rsp), 5844 .lock_cmd = SMB2_LOCK, 5845 .cap_unix = 0, 5846 .cap_nt_find = SMB2_NT_FIND, 5847 .cap_large_files = SMB2_LARGE_FILES, 5848 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5849 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5850 .create_lease_size = sizeof(struct create_lease_v2), 5851 }; 5852