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->current_mid, 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->current_mid, 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->current_mid, 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->current_mid, 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->current_mid, 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->current_mid, 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->current_mid, 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->current_mid, 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->current_mid, 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_counter_lock); 378 mid = server->current_mid++; 379 spin_unlock(&server->mid_counter_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_counter_lock); 387 if (server->current_mid >= val) 388 server->current_mid -= val; 389 spin_unlock(&server->mid_counter_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_queue_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->deleted_from_q = true; 413 } 414 spin_unlock(&server->mid_queue_lock); 415 return mid; 416 } 417 } 418 spin_unlock(&server->mid_queue_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_counter_lock); 464 server->current_mid = 0; 465 spin_unlock(&server->mid_counter_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 const struct smbdirect_socket_parameters *sp = 508 smbd_get_parameters(server->smbd_conn); 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 const struct smbdirect_socket_parameters *sp = 559 smbd_get_parameters(server->smbd_conn); 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 /* Validate that Next doesn't point beyond the buffer */ 776 if (next > bytes_left) { 777 cifs_dbg(VFS, "%s: invalid Next pointer %zu > %zd\n", 778 __func__, next, bytes_left); 779 rc = -EINVAL; 780 goto out; 781 } 782 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 783 bytes_left -= next; 784 } 785 786 if (!nb_iface) { 787 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 788 rc = -EINVAL; 789 goto out; 790 } 791 792 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 793 if ((bytes_left > 8) || 794 (bytes_left >= offsetof(struct network_interface_info_ioctl_rsp, Next) 795 + sizeof(p->Next) && p->Next)) 796 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 797 798 ses->iface_last_update = jiffies; 799 800 out: 801 /* 802 * Go through the list again and put the inactive entries 803 */ 804 spin_lock(&ses->iface_lock); 805 list_for_each_entry_safe(iface, niface, &ses->iface_list, 806 iface_head) { 807 if (!iface->is_active) { 808 list_del(&iface->iface_head); 809 kref_put(&iface->refcount, release_iface); 810 ses->iface_count--; 811 } 812 } 813 spin_unlock(&ses->iface_lock); 814 815 return rc; 816 } 817 818 int 819 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 820 { 821 int rc; 822 unsigned int ret_data_len = 0; 823 struct network_interface_info_ioctl_rsp *out_buf = NULL; 824 struct cifs_ses *ses = tcon->ses; 825 struct TCP_Server_Info *pserver; 826 827 /* do not query too frequently */ 828 if (ses->iface_last_update && 829 time_before(jiffies, ses->iface_last_update + 830 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 831 return 0; 832 833 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 834 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 835 NULL /* no data input */, 0 /* no data input */, 836 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 837 if (rc == -EOPNOTSUPP) { 838 cifs_dbg(FYI, 839 "server does not support query network interfaces\n"); 840 ret_data_len = 0; 841 } else if (rc != 0) { 842 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 843 goto out; 844 } 845 846 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 847 if (rc) 848 goto out; 849 850 /* check if iface is still active */ 851 spin_lock(&ses->chan_lock); 852 pserver = ses->chans[0].server; 853 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 854 spin_unlock(&ses->chan_lock); 855 cifs_chan_update_iface(ses, pserver); 856 spin_lock(&ses->chan_lock); 857 } 858 spin_unlock(&ses->chan_lock); 859 860 out: 861 kfree(out_buf); 862 return rc; 863 } 864 865 static void 866 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 867 struct cifs_sb_info *cifs_sb) 868 { 869 int rc; 870 __le16 srch_path = 0; /* Null - open root of share */ 871 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 872 struct cifs_open_parms oparms; 873 struct cifs_fid fid; 874 struct cached_fid *cfid = NULL; 875 876 oparms = (struct cifs_open_parms) { 877 .tcon = tcon, 878 .path = "", 879 .desired_access = FILE_READ_ATTRIBUTES, 880 .disposition = FILE_OPEN, 881 .create_options = cifs_create_options(cifs_sb, 0), 882 .fid = &fid, 883 }; 884 885 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 886 if (rc == 0) 887 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 888 else 889 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 890 NULL, NULL); 891 if (rc) 892 return; 893 894 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 895 896 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 897 FS_ATTRIBUTE_INFORMATION); 898 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 899 FS_DEVICE_INFORMATION); 900 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 901 FS_VOLUME_INFORMATION); 902 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 903 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 904 if (cfid == NULL) 905 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 906 else 907 close_cached_dir(cfid); 908 } 909 910 static void 911 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 912 struct cifs_sb_info *cifs_sb) 913 { 914 int rc; 915 __le16 srch_path = 0; /* Null - open root of share */ 916 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 917 struct cifs_open_parms oparms; 918 struct cifs_fid fid; 919 920 oparms = (struct cifs_open_parms) { 921 .tcon = tcon, 922 .path = "", 923 .desired_access = FILE_READ_ATTRIBUTES, 924 .disposition = FILE_OPEN, 925 .create_options = cifs_create_options(cifs_sb, 0), 926 .fid = &fid, 927 }; 928 929 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 930 NULL, NULL); 931 if (rc) 932 return; 933 934 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 935 FS_ATTRIBUTE_INFORMATION); 936 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 937 FS_DEVICE_INFORMATION); 938 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 939 } 940 941 static int 942 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 943 struct cifs_sb_info *cifs_sb, const char *full_path) 944 { 945 __le16 *utf16_path; 946 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 947 int err_buftype = CIFS_NO_BUFFER; 948 struct cifs_open_parms oparms; 949 struct kvec err_iov = {}; 950 struct cifs_fid fid; 951 struct cached_fid *cfid; 952 bool islink; 953 int rc, rc2; 954 955 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 956 if (!rc) { 957 close_cached_dir(cfid); 958 return 0; 959 } 960 961 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 962 if (!utf16_path) 963 return -ENOMEM; 964 965 oparms = (struct cifs_open_parms) { 966 .tcon = tcon, 967 .path = full_path, 968 .desired_access = FILE_READ_ATTRIBUTES, 969 .disposition = FILE_OPEN, 970 .create_options = cifs_create_options(cifs_sb, 0), 971 .fid = &fid, 972 }; 973 974 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 975 &err_iov, &err_buftype); 976 if (rc) { 977 struct smb2_hdr *hdr = err_iov.iov_base; 978 979 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 980 goto out; 981 982 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 983 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 984 full_path, &islink); 985 if (rc2) { 986 rc = rc2; 987 goto out; 988 } 989 if (islink) 990 rc = -EREMOTE; 991 } 992 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && 993 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 994 rc = -EOPNOTSUPP; 995 goto out; 996 } 997 998 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 999 1000 out: 1001 free_rsp_buf(err_buftype, err_iov.iov_base); 1002 kfree(utf16_path); 1003 return rc; 1004 } 1005 1006 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 1007 struct cifs_sb_info *cifs_sb, const char *full_path, 1008 u64 *uniqueid, struct cifs_open_info_data *data) 1009 { 1010 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 1011 return 0; 1012 } 1013 1014 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 1015 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 1016 { 1017 struct cifs_fid *fid = &cfile->fid; 1018 1019 if (cfile->symlink_target) { 1020 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 1021 if (!data->symlink_target) 1022 return -ENOMEM; 1023 } 1024 data->contains_posix_file_info = false; 1025 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 1026 } 1027 1028 #ifdef CONFIG_CIFS_XATTR 1029 static ssize_t 1030 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 1031 struct smb2_file_full_ea_info *src, size_t src_size, 1032 const unsigned char *ea_name) 1033 { 1034 int rc = 0; 1035 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 1036 char *name, *value; 1037 size_t buf_size = dst_size; 1038 size_t name_len, value_len, user_name_len; 1039 1040 while (src_size > 0) { 1041 name_len = (size_t)src->ea_name_length; 1042 value_len = (size_t)le16_to_cpu(src->ea_value_length); 1043 1044 if (name_len == 0) 1045 break; 1046 1047 if (src_size < 8 + name_len + 1 + value_len) { 1048 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 1049 rc = -EIO; 1050 goto out; 1051 } 1052 1053 name = &src->ea_data[0]; 1054 value = &src->ea_data[src->ea_name_length + 1]; 1055 1056 if (ea_name) { 1057 if (ea_name_len == name_len && 1058 memcmp(ea_name, name, name_len) == 0) { 1059 rc = value_len; 1060 if (dst_size == 0) 1061 goto out; 1062 if (dst_size < value_len) { 1063 rc = -ERANGE; 1064 goto out; 1065 } 1066 memcpy(dst, value, value_len); 1067 goto out; 1068 } 1069 } else { 1070 /* 'user.' plus a terminating null */ 1071 user_name_len = 5 + 1 + name_len; 1072 1073 if (buf_size == 0) { 1074 /* skip copy - calc size only */ 1075 rc += user_name_len; 1076 } else if (dst_size >= user_name_len) { 1077 dst_size -= user_name_len; 1078 memcpy(dst, "user.", 5); 1079 dst += 5; 1080 memcpy(dst, src->ea_data, name_len); 1081 dst += name_len; 1082 *dst = 0; 1083 ++dst; 1084 rc += user_name_len; 1085 } else { 1086 /* stop before overrun buffer */ 1087 rc = -ERANGE; 1088 break; 1089 } 1090 } 1091 1092 if (!src->next_entry_offset) 1093 break; 1094 1095 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1096 /* stop before overrun buffer */ 1097 rc = -ERANGE; 1098 break; 1099 } 1100 src_size -= le32_to_cpu(src->next_entry_offset); 1101 src = (void *)((char *)src + 1102 le32_to_cpu(src->next_entry_offset)); 1103 } 1104 1105 /* didn't find the named attribute */ 1106 if (ea_name) 1107 rc = -ENODATA; 1108 1109 out: 1110 return (ssize_t)rc; 1111 } 1112 1113 static ssize_t 1114 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1115 const unsigned char *path, const unsigned char *ea_name, 1116 char *ea_data, size_t buf_size, 1117 struct cifs_sb_info *cifs_sb) 1118 { 1119 int rc; 1120 struct kvec rsp_iov = {NULL, 0}; 1121 int buftype = CIFS_NO_BUFFER; 1122 struct smb2_query_info_rsp *rsp; 1123 struct smb2_file_full_ea_info *info = NULL; 1124 1125 rc = smb2_query_info_compound(xid, tcon, path, 1126 FILE_READ_EA, 1127 FILE_FULL_EA_INFORMATION, 1128 SMB2_O_INFO_FILE, 1129 CIFSMaxBufSize - 1130 MAX_SMB2_CREATE_RESPONSE_SIZE - 1131 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1132 &rsp_iov, &buftype, cifs_sb); 1133 if (rc) { 1134 /* 1135 * If ea_name is NULL (listxattr) and there are no EAs, 1136 * return 0 as it's not an error. Otherwise, the specified 1137 * ea_name was not found. 1138 */ 1139 if (!ea_name && rc == -ENODATA) 1140 rc = 0; 1141 goto qeas_exit; 1142 } 1143 1144 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1145 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1146 le32_to_cpu(rsp->OutputBufferLength), 1147 &rsp_iov, 1148 sizeof(struct smb2_file_full_ea_info)); 1149 if (rc) 1150 goto qeas_exit; 1151 1152 info = (struct smb2_file_full_ea_info *)( 1153 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1154 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1155 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1156 1157 qeas_exit: 1158 free_rsp_buf(buftype, rsp_iov.iov_base); 1159 return rc; 1160 } 1161 1162 static int 1163 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1164 const char *path, const char *ea_name, const void *ea_value, 1165 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1166 struct cifs_sb_info *cifs_sb) 1167 { 1168 struct smb2_compound_vars *vars; 1169 struct cifs_ses *ses = tcon->ses; 1170 struct TCP_Server_Info *server; 1171 struct smb_rqst *rqst; 1172 struct kvec *rsp_iov; 1173 __le16 *utf16_path = NULL; 1174 int ea_name_len = strlen(ea_name); 1175 int flags = CIFS_CP_CREATE_CLOSE_OP; 1176 int len; 1177 int resp_buftype[3]; 1178 struct cifs_open_parms oparms; 1179 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1180 struct cifs_fid fid; 1181 unsigned int size[1]; 1182 void *data[1]; 1183 struct smb2_file_full_ea_info *ea; 1184 struct smb2_query_info_rsp *rsp; 1185 int rc, used_len = 0; 1186 int retries = 0, cur_sleep = 1; 1187 1188 replay_again: 1189 /* reinitialize for possible replay */ 1190 flags = CIFS_CP_CREATE_CLOSE_OP; 1191 oplock = SMB2_OPLOCK_LEVEL_NONE; 1192 server = cifs_pick_channel(ses); 1193 1194 if (smb3_encryption_required(tcon)) 1195 flags |= CIFS_TRANSFORM_REQ; 1196 1197 if (ea_name_len > 255) 1198 return -EINVAL; 1199 1200 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1201 if (!utf16_path) 1202 return -ENOMEM; 1203 1204 ea = NULL; 1205 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1206 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1207 if (!vars) { 1208 rc = -ENOMEM; 1209 goto out_free_path; 1210 } 1211 rqst = vars->rqst; 1212 rsp_iov = vars->rsp_iov; 1213 1214 if (ses->server->ops->query_all_EAs) { 1215 if (!ea_value) { 1216 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1217 ea_name, NULL, 0, 1218 cifs_sb); 1219 if (rc == -ENODATA) 1220 goto sea_exit; 1221 } else { 1222 /* If we are adding a attribute we should first check 1223 * if there will be enough space available to store 1224 * the new EA. If not we should not add it since we 1225 * would not be able to even read the EAs back. 1226 */ 1227 rc = smb2_query_info_compound(xid, tcon, path, 1228 FILE_READ_EA, 1229 FILE_FULL_EA_INFORMATION, 1230 SMB2_O_INFO_FILE, 1231 CIFSMaxBufSize - 1232 MAX_SMB2_CREATE_RESPONSE_SIZE - 1233 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1234 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1235 if (rc == 0) { 1236 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1237 used_len = le32_to_cpu(rsp->OutputBufferLength); 1238 } 1239 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1240 resp_buftype[1] = CIFS_NO_BUFFER; 1241 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1242 rc = 0; 1243 1244 /* Use a fudge factor of 256 bytes in case we collide 1245 * with a different set_EAs command. 1246 */ 1247 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1248 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1249 used_len + ea_name_len + ea_value_len + 1) { 1250 rc = -ENOSPC; 1251 goto sea_exit; 1252 } 1253 } 1254 } 1255 1256 /* Open */ 1257 rqst[0].rq_iov = vars->open_iov; 1258 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1259 1260 oparms = (struct cifs_open_parms) { 1261 .tcon = tcon, 1262 .path = path, 1263 .desired_access = FILE_WRITE_EA, 1264 .disposition = FILE_OPEN, 1265 .create_options = cifs_create_options(cifs_sb, 0), 1266 .fid = &fid, 1267 .replay = !!(retries), 1268 }; 1269 1270 rc = SMB2_open_init(tcon, server, 1271 &rqst[0], &oplock, &oparms, utf16_path); 1272 if (rc) 1273 goto sea_exit; 1274 smb2_set_next_command(tcon, &rqst[0]); 1275 1276 1277 /* Set Info */ 1278 rqst[1].rq_iov = vars->si_iov; 1279 rqst[1].rq_nvec = 1; 1280 1281 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1282 ea = kzalloc(len, GFP_KERNEL); 1283 if (ea == NULL) { 1284 rc = -ENOMEM; 1285 goto sea_exit; 1286 } 1287 1288 ea->ea_name_length = ea_name_len; 1289 ea->ea_value_length = cpu_to_le16(ea_value_len); 1290 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1291 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1292 1293 size[0] = len; 1294 data[0] = ea; 1295 1296 rc = SMB2_set_info_init(tcon, server, 1297 &rqst[1], COMPOUND_FID, 1298 COMPOUND_FID, current->tgid, 1299 FILE_FULL_EA_INFORMATION, 1300 SMB2_O_INFO_FILE, 0, data, size); 1301 if (rc) 1302 goto sea_exit; 1303 smb2_set_next_command(tcon, &rqst[1]); 1304 smb2_set_related(&rqst[1]); 1305 1306 /* Close */ 1307 rqst[2].rq_iov = &vars->close_iov; 1308 rqst[2].rq_nvec = 1; 1309 rc = SMB2_close_init(tcon, server, 1310 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1311 if (rc) 1312 goto sea_exit; 1313 smb2_set_related(&rqst[2]); 1314 1315 if (retries) { 1316 smb2_set_replay(server, &rqst[0]); 1317 smb2_set_replay(server, &rqst[1]); 1318 smb2_set_replay(server, &rqst[2]); 1319 } 1320 1321 rc = compound_send_recv(xid, ses, server, 1322 flags, 3, rqst, 1323 resp_buftype, rsp_iov); 1324 /* no need to bump num_remote_opens because handle immediately closed */ 1325 1326 sea_exit: 1327 kfree(ea); 1328 SMB2_open_free(&rqst[0]); 1329 SMB2_set_info_free(&rqst[1]); 1330 SMB2_close_free(&rqst[2]); 1331 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1332 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1333 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1334 kfree(vars); 1335 out_free_path: 1336 kfree(utf16_path); 1337 1338 if (is_replayable_error(rc) && 1339 smb2_should_replay(tcon, &retries, &cur_sleep)) 1340 goto replay_again; 1341 1342 return rc; 1343 } 1344 #endif 1345 1346 static bool 1347 smb2_can_echo(struct TCP_Server_Info *server) 1348 { 1349 return server->echoes; 1350 } 1351 1352 static void 1353 smb2_clear_stats(struct cifs_tcon *tcon) 1354 { 1355 int i; 1356 1357 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1358 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1359 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1360 } 1361 } 1362 1363 static void 1364 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1365 { 1366 seq_puts(m, "\n\tShare Capabilities:"); 1367 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1368 seq_puts(m, " DFS,"); 1369 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1370 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1371 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1372 seq_puts(m, " SCALEOUT,"); 1373 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1374 seq_puts(m, " CLUSTER,"); 1375 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1376 seq_puts(m, " ASYMMETRIC,"); 1377 if (tcon->capabilities == 0) 1378 seq_puts(m, " None"); 1379 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1380 seq_puts(m, " Aligned,"); 1381 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1382 seq_puts(m, " Partition Aligned,"); 1383 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1384 seq_puts(m, " SSD,"); 1385 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1386 seq_puts(m, " TRIM-support,"); 1387 1388 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1389 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1390 if (tcon->perf_sector_size) 1391 seq_printf(m, "\tOptimal sector size: 0x%x", 1392 tcon->perf_sector_size); 1393 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1394 } 1395 1396 static void 1397 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1398 { 1399 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1400 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1401 1402 /* 1403 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1404 * totals (requests sent) since those SMBs are per-session not per tcon 1405 */ 1406 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1407 (long long)(tcon->bytes_read), 1408 (long long)(tcon->bytes_written)); 1409 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1410 atomic_read(&tcon->num_local_opens), 1411 atomic_read(&tcon->num_remote_opens)); 1412 seq_printf(m, "\nTreeConnects: %d total %d failed", 1413 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1414 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1415 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1416 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1417 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1418 seq_printf(m, "\nCreates: %d total %d failed", 1419 atomic_read(&sent[SMB2_CREATE_HE]), 1420 atomic_read(&failed[SMB2_CREATE_HE])); 1421 seq_printf(m, "\nCloses: %d total %d failed", 1422 atomic_read(&sent[SMB2_CLOSE_HE]), 1423 atomic_read(&failed[SMB2_CLOSE_HE])); 1424 seq_printf(m, "\nFlushes: %d total %d failed", 1425 atomic_read(&sent[SMB2_FLUSH_HE]), 1426 atomic_read(&failed[SMB2_FLUSH_HE])); 1427 seq_printf(m, "\nReads: %d total %d failed", 1428 atomic_read(&sent[SMB2_READ_HE]), 1429 atomic_read(&failed[SMB2_READ_HE])); 1430 seq_printf(m, "\nWrites: %d total %d failed", 1431 atomic_read(&sent[SMB2_WRITE_HE]), 1432 atomic_read(&failed[SMB2_WRITE_HE])); 1433 seq_printf(m, "\nLocks: %d total %d failed", 1434 atomic_read(&sent[SMB2_LOCK_HE]), 1435 atomic_read(&failed[SMB2_LOCK_HE])); 1436 seq_printf(m, "\nIOCTLs: %d total %d failed", 1437 atomic_read(&sent[SMB2_IOCTL_HE]), 1438 atomic_read(&failed[SMB2_IOCTL_HE])); 1439 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1440 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1441 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1442 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1443 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1444 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1445 seq_printf(m, "\nQueryInfos: %d total %d failed", 1446 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1447 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1448 seq_printf(m, "\nSetInfos: %d total %d failed", 1449 atomic_read(&sent[SMB2_SET_INFO_HE]), 1450 atomic_read(&failed[SMB2_SET_INFO_HE])); 1451 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1452 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1453 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1454 } 1455 1456 static void 1457 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1458 { 1459 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1460 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1461 1462 cfile->fid.persistent_fid = fid->persistent_fid; 1463 cfile->fid.volatile_fid = fid->volatile_fid; 1464 cfile->fid.access = fid->access; 1465 #ifdef CONFIG_CIFS_DEBUG2 1466 cfile->fid.mid = fid->mid; 1467 #endif /* CIFS_DEBUG2 */ 1468 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1469 &fid->purge_cache); 1470 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1471 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1472 } 1473 1474 static int 1475 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1476 struct cifs_fid *fid) 1477 { 1478 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1479 } 1480 1481 static int 1482 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1483 struct cifsFileInfo *cfile) 1484 { 1485 struct smb2_file_network_open_info file_inf; 1486 struct inode *inode; 1487 int rc; 1488 1489 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1490 cfile->fid.volatile_fid, &file_inf); 1491 if (rc) 1492 return rc; 1493 1494 inode = d_inode(cfile->dentry); 1495 1496 spin_lock(&inode->i_lock); 1497 CIFS_I(inode)->time = jiffies; 1498 1499 /* Creation time should not need to be updated on close */ 1500 if (file_inf.LastWriteTime) 1501 inode_set_mtime_to_ts(inode, 1502 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1503 if (file_inf.ChangeTime) 1504 inode_set_ctime_to_ts(inode, 1505 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1506 if (file_inf.LastAccessTime) 1507 inode_set_atime_to_ts(inode, 1508 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1509 1510 /* 1511 * i_blocks is not related to (i_size / i_blksize), 1512 * but instead 512 byte (2**9) size is required for 1513 * calculating num blocks. 1514 */ 1515 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1516 inode->i_blocks = 1517 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1518 1519 /* End of file and Attributes should not have to be updated on close */ 1520 spin_unlock(&inode->i_lock); 1521 return rc; 1522 } 1523 1524 static int 1525 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1526 u64 persistent_fid, u64 volatile_fid, 1527 struct copychunk_ioctl *pcchunk) 1528 { 1529 int rc; 1530 unsigned int ret_data_len; 1531 struct resume_key_req *res_key; 1532 1533 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1534 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1535 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1536 1537 if (rc == -EOPNOTSUPP) { 1538 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1539 goto req_res_key_exit; 1540 } else if (rc) { 1541 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1542 goto req_res_key_exit; 1543 } 1544 if (ret_data_len < sizeof(struct resume_key_req)) { 1545 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1546 rc = -EINVAL; 1547 goto req_res_key_exit; 1548 } 1549 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1550 1551 req_res_key_exit: 1552 kfree(res_key); 1553 return rc; 1554 } 1555 1556 static int 1557 smb2_ioctl_query_info(const unsigned int xid, 1558 struct cifs_tcon *tcon, 1559 struct cifs_sb_info *cifs_sb, 1560 __le16 *path, int is_dir, 1561 unsigned long p) 1562 { 1563 struct smb2_compound_vars *vars; 1564 struct smb_rqst *rqst; 1565 struct kvec *rsp_iov; 1566 struct cifs_ses *ses = tcon->ses; 1567 struct TCP_Server_Info *server; 1568 char __user *arg = (char __user *)p; 1569 struct smb_query_info qi; 1570 struct smb_query_info __user *pqi; 1571 int rc = 0; 1572 int flags = CIFS_CP_CREATE_CLOSE_OP; 1573 struct smb2_query_info_rsp *qi_rsp = NULL; 1574 struct smb2_ioctl_rsp *io_rsp = NULL; 1575 void *buffer = NULL; 1576 int resp_buftype[3]; 1577 struct cifs_open_parms oparms; 1578 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1579 struct cifs_fid fid; 1580 unsigned int size[2]; 1581 void *data[2]; 1582 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1583 void (*free_req1_func)(struct smb_rqst *r); 1584 int retries = 0, cur_sleep = 1; 1585 1586 replay_again: 1587 /* reinitialize for possible replay */ 1588 flags = CIFS_CP_CREATE_CLOSE_OP; 1589 oplock = SMB2_OPLOCK_LEVEL_NONE; 1590 server = cifs_pick_channel(ses); 1591 1592 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1593 if (vars == NULL) 1594 return -ENOMEM; 1595 rqst = &vars->rqst[0]; 1596 rsp_iov = &vars->rsp_iov[0]; 1597 1598 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1599 1600 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1601 rc = -EFAULT; 1602 goto free_vars; 1603 } 1604 if (qi.output_buffer_length > 1024) { 1605 rc = -EINVAL; 1606 goto free_vars; 1607 } 1608 1609 if (!ses || !server) { 1610 rc = -EIO; 1611 goto free_vars; 1612 } 1613 1614 if (smb3_encryption_required(tcon)) 1615 flags |= CIFS_TRANSFORM_REQ; 1616 1617 if (qi.output_buffer_length) { 1618 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1619 if (IS_ERR(buffer)) { 1620 rc = PTR_ERR(buffer); 1621 goto free_vars; 1622 } 1623 } 1624 1625 /* Open */ 1626 rqst[0].rq_iov = &vars->open_iov[0]; 1627 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1628 1629 oparms = (struct cifs_open_parms) { 1630 .tcon = tcon, 1631 .disposition = FILE_OPEN, 1632 .create_options = cifs_create_options(cifs_sb, create_options), 1633 .fid = &fid, 1634 .replay = !!(retries), 1635 }; 1636 1637 if (qi.flags & PASSTHRU_FSCTL) { 1638 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1639 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1640 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1641 break; 1642 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1643 oparms.desired_access = GENERIC_ALL; 1644 break; 1645 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1646 oparms.desired_access = GENERIC_READ; 1647 break; 1648 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1649 oparms.desired_access = GENERIC_WRITE; 1650 break; 1651 } 1652 } else if (qi.flags & PASSTHRU_SET_INFO) { 1653 oparms.desired_access = GENERIC_WRITE; 1654 } else { 1655 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1656 } 1657 1658 rc = SMB2_open_init(tcon, server, 1659 &rqst[0], &oplock, &oparms, path); 1660 if (rc) 1661 goto free_output_buffer; 1662 smb2_set_next_command(tcon, &rqst[0]); 1663 1664 /* Query */ 1665 if (qi.flags & PASSTHRU_FSCTL) { 1666 /* Can eventually relax perm check since server enforces too */ 1667 if (!capable(CAP_SYS_ADMIN)) { 1668 rc = -EPERM; 1669 goto free_open_req; 1670 } 1671 rqst[1].rq_iov = &vars->io_iov[0]; 1672 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1673 1674 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1675 qi.info_type, buffer, qi.output_buffer_length, 1676 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1677 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1678 free_req1_func = SMB2_ioctl_free; 1679 } else if (qi.flags == PASSTHRU_SET_INFO) { 1680 /* Can eventually relax perm check since server enforces too */ 1681 if (!capable(CAP_SYS_ADMIN)) { 1682 rc = -EPERM; 1683 goto free_open_req; 1684 } 1685 if (qi.output_buffer_length < 8) { 1686 rc = -EINVAL; 1687 goto free_open_req; 1688 } 1689 rqst[1].rq_iov = vars->si_iov; 1690 rqst[1].rq_nvec = 1; 1691 1692 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1693 size[0] = 8; 1694 data[0] = buffer; 1695 1696 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1697 current->tgid, FILE_END_OF_FILE_INFORMATION, 1698 SMB2_O_INFO_FILE, 0, data, size); 1699 free_req1_func = SMB2_set_info_free; 1700 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1701 rqst[1].rq_iov = &vars->qi_iov; 1702 rqst[1].rq_nvec = 1; 1703 1704 rc = SMB2_query_info_init(tcon, server, 1705 &rqst[1], COMPOUND_FID, 1706 COMPOUND_FID, qi.file_info_class, 1707 qi.info_type, qi.additional_information, 1708 qi.input_buffer_length, 1709 qi.output_buffer_length, buffer); 1710 free_req1_func = SMB2_query_info_free; 1711 } else { /* unknown flags */ 1712 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1713 qi.flags); 1714 rc = -EINVAL; 1715 } 1716 1717 if (rc) 1718 goto free_open_req; 1719 smb2_set_next_command(tcon, &rqst[1]); 1720 smb2_set_related(&rqst[1]); 1721 1722 /* Close */ 1723 rqst[2].rq_iov = &vars->close_iov; 1724 rqst[2].rq_nvec = 1; 1725 1726 rc = SMB2_close_init(tcon, server, 1727 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1728 if (rc) 1729 goto free_req_1; 1730 smb2_set_related(&rqst[2]); 1731 1732 if (retries) { 1733 smb2_set_replay(server, &rqst[0]); 1734 smb2_set_replay(server, &rqst[1]); 1735 smb2_set_replay(server, &rqst[2]); 1736 } 1737 1738 rc = compound_send_recv(xid, ses, server, 1739 flags, 3, rqst, 1740 resp_buftype, rsp_iov); 1741 if (rc) 1742 goto out; 1743 1744 /* No need to bump num_remote_opens since handle immediately closed */ 1745 if (qi.flags & PASSTHRU_FSCTL) { 1746 pqi = (struct smb_query_info __user *)arg; 1747 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1748 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1749 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1750 if (qi.input_buffer_length > 0 && 1751 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1752 > rsp_iov[1].iov_len) { 1753 rc = -EFAULT; 1754 goto out; 1755 } 1756 1757 if (copy_to_user(&pqi->input_buffer_length, 1758 &qi.input_buffer_length, 1759 sizeof(qi.input_buffer_length))) { 1760 rc = -EFAULT; 1761 goto out; 1762 } 1763 1764 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1765 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1766 qi.input_buffer_length)) 1767 rc = -EFAULT; 1768 } else { 1769 pqi = (struct smb_query_info __user *)arg; 1770 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1771 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1772 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1773 if (copy_to_user(&pqi->input_buffer_length, 1774 &qi.input_buffer_length, 1775 sizeof(qi.input_buffer_length))) { 1776 rc = -EFAULT; 1777 goto out; 1778 } 1779 1780 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1781 qi.input_buffer_length)) 1782 rc = -EFAULT; 1783 } 1784 1785 out: 1786 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1787 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1788 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1789 SMB2_close_free(&rqst[2]); 1790 free_req_1: 1791 free_req1_func(&rqst[1]); 1792 free_open_req: 1793 SMB2_open_free(&rqst[0]); 1794 free_output_buffer: 1795 kfree(buffer); 1796 free_vars: 1797 kfree(vars); 1798 1799 if (is_replayable_error(rc) && 1800 smb2_should_replay(tcon, &retries, &cur_sleep)) 1801 goto replay_again; 1802 1803 return rc; 1804 } 1805 1806 static ssize_t 1807 smb2_copychunk_range(const unsigned int xid, 1808 struct cifsFileInfo *srcfile, 1809 struct cifsFileInfo *trgtfile, u64 src_off, 1810 u64 len, u64 dest_off) 1811 { 1812 int rc; 1813 unsigned int ret_data_len; 1814 struct copychunk_ioctl *pcchunk; 1815 struct copychunk_ioctl_rsp *retbuf = NULL; 1816 struct cifs_tcon *tcon; 1817 int chunks_copied = 0; 1818 bool chunk_sizes_updated = false; 1819 ssize_t bytes_written, total_bytes_written = 0; 1820 1821 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1822 if (pcchunk == NULL) 1823 return -ENOMEM; 1824 1825 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1826 /* Request a key from the server to identify the source of the copy */ 1827 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1828 srcfile->fid.persistent_fid, 1829 srcfile->fid.volatile_fid, pcchunk); 1830 1831 /* Note: request_res_key sets res_key null only if rc !=0 */ 1832 if (rc) 1833 goto cchunk_out; 1834 1835 /* For now array only one chunk long, will make more flexible later */ 1836 pcchunk->ChunkCount = cpu_to_le32(1); 1837 pcchunk->Reserved = 0; 1838 pcchunk->Reserved2 = 0; 1839 1840 tcon = tlink_tcon(trgtfile->tlink); 1841 1842 trace_smb3_copychunk_enter(xid, srcfile->fid.volatile_fid, 1843 trgtfile->fid.volatile_fid, tcon->tid, 1844 tcon->ses->Suid, src_off, dest_off, len); 1845 1846 while (len > 0) { 1847 pcchunk->SourceOffset = cpu_to_le64(src_off); 1848 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1849 pcchunk->Length = 1850 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1851 1852 /* Request server copy to target from src identified by key */ 1853 kfree(retbuf); 1854 retbuf = NULL; 1855 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1856 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1857 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1858 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1859 if (rc == 0) { 1860 if (ret_data_len != 1861 sizeof(struct copychunk_ioctl_rsp)) { 1862 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1863 rc = -EIO; 1864 goto cchunk_out; 1865 } 1866 if (retbuf->TotalBytesWritten == 0) { 1867 cifs_dbg(FYI, "no bytes copied\n"); 1868 rc = -EIO; 1869 goto cchunk_out; 1870 } 1871 /* 1872 * Check if server claimed to write more than we asked 1873 */ 1874 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1875 le32_to_cpu(pcchunk->Length)) { 1876 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1877 rc = -EIO; 1878 goto cchunk_out; 1879 } 1880 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1881 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1882 rc = -EIO; 1883 goto cchunk_out; 1884 } 1885 chunks_copied++; 1886 1887 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1888 src_off += bytes_written; 1889 dest_off += bytes_written; 1890 len -= bytes_written; 1891 total_bytes_written += bytes_written; 1892 1893 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1894 le32_to_cpu(retbuf->ChunksWritten), 1895 le32_to_cpu(retbuf->ChunkBytesWritten), 1896 bytes_written); 1897 trace_smb3_copychunk_done(xid, srcfile->fid.volatile_fid, 1898 trgtfile->fid.volatile_fid, tcon->tid, 1899 tcon->ses->Suid, src_off, dest_off, len); 1900 } else if (rc == -EINVAL) { 1901 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1902 goto cchunk_out; 1903 1904 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1905 le32_to_cpu(retbuf->ChunksWritten), 1906 le32_to_cpu(retbuf->ChunkBytesWritten), 1907 le32_to_cpu(retbuf->TotalBytesWritten)); 1908 1909 /* 1910 * Check if this is the first request using these sizes, 1911 * (ie check if copy succeed once with original sizes 1912 * and check if the server gave us different sizes after 1913 * we already updated max sizes on previous request). 1914 * if not then why is the server returning an error now 1915 */ 1916 if ((chunks_copied != 0) || chunk_sizes_updated) 1917 goto cchunk_out; 1918 1919 /* Check that server is not asking us to grow size */ 1920 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1921 tcon->max_bytes_chunk) 1922 tcon->max_bytes_chunk = 1923 le32_to_cpu(retbuf->ChunkBytesWritten); 1924 else 1925 goto cchunk_out; /* server gave us bogus size */ 1926 1927 /* No need to change MaxChunks since already set to 1 */ 1928 chunk_sizes_updated = true; 1929 } else 1930 goto cchunk_out; 1931 } 1932 1933 cchunk_out: 1934 kfree(pcchunk); 1935 kfree(retbuf); 1936 if (rc) 1937 return rc; 1938 else 1939 return total_bytes_written; 1940 } 1941 1942 static int 1943 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1944 struct cifs_fid *fid) 1945 { 1946 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1947 } 1948 1949 static unsigned int 1950 smb2_read_data_offset(char *buf) 1951 { 1952 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1953 1954 return rsp->DataOffset; 1955 } 1956 1957 static unsigned int 1958 smb2_read_data_length(char *buf, bool in_remaining) 1959 { 1960 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1961 1962 if (in_remaining) 1963 return le32_to_cpu(rsp->DataRemaining); 1964 1965 return le32_to_cpu(rsp->DataLength); 1966 } 1967 1968 1969 static int 1970 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1971 struct cifs_io_parms *parms, unsigned int *bytes_read, 1972 char **buf, int *buf_type) 1973 { 1974 parms->persistent_fid = pfid->persistent_fid; 1975 parms->volatile_fid = pfid->volatile_fid; 1976 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1977 } 1978 1979 static int 1980 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1981 struct cifs_io_parms *parms, unsigned int *written, 1982 struct kvec *iov, unsigned long nr_segs) 1983 { 1984 1985 parms->persistent_fid = pfid->persistent_fid; 1986 parms->volatile_fid = pfid->volatile_fid; 1987 return SMB2_write(xid, parms, written, iov, nr_segs); 1988 } 1989 1990 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1991 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1992 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1993 { 1994 struct cifsInodeInfo *cifsi; 1995 int rc; 1996 1997 cifsi = CIFS_I(inode); 1998 1999 /* if file already sparse don't bother setting sparse again */ 2000 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 2001 return true; /* already sparse */ 2002 2003 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 2004 return true; /* already not sparse */ 2005 2006 /* 2007 * Can't check for sparse support on share the usual way via the 2008 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 2009 * since Samba server doesn't set the flag on the share, yet 2010 * supports the set sparse FSCTL and returns sparse correctly 2011 * in the file attributes. If we fail setting sparse though we 2012 * mark that server does not support sparse files for this share 2013 * to avoid repeatedly sending the unsupported fsctl to server 2014 * if the file is repeatedly extended. 2015 */ 2016 if (tcon->broken_sparse_sup) 2017 return false; 2018 2019 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2020 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 2021 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 2022 if (rc) { 2023 tcon->broken_sparse_sup = true; 2024 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 2025 return false; 2026 } 2027 2028 if (setsparse) 2029 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 2030 else 2031 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 2032 2033 return true; 2034 } 2035 2036 static int 2037 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 2038 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 2039 { 2040 struct inode *inode; 2041 2042 /* 2043 * If extending file more than one page make sparse. Many Linux fs 2044 * make files sparse by default when extending via ftruncate 2045 */ 2046 inode = d_inode(cfile->dentry); 2047 2048 if (!set_alloc && (size > inode->i_size + 8192)) { 2049 __u8 set_sparse = 1; 2050 2051 /* whether set sparse succeeds or not, extend the file */ 2052 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 2053 } 2054 2055 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 2056 cfile->fid.volatile_fid, cfile->pid, size); 2057 } 2058 2059 static int 2060 smb2_duplicate_extents(const unsigned int xid, 2061 struct cifsFileInfo *srcfile, 2062 struct cifsFileInfo *trgtfile, u64 src_off, 2063 u64 len, u64 dest_off) 2064 { 2065 int rc; 2066 unsigned int ret_data_len; 2067 struct inode *inode; 2068 struct duplicate_extents_to_file dup_ext_buf; 2069 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2070 2071 /* server fileays advertise duplicate extent support with this flag */ 2072 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2073 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2074 return -EOPNOTSUPP; 2075 2076 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2077 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2078 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2079 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2080 dup_ext_buf.ByteCount = cpu_to_le64(len); 2081 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2082 src_off, dest_off, len); 2083 trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid, 2084 trgtfile->fid.volatile_fid, tcon->tid, 2085 tcon->ses->Suid, src_off, dest_off, len); 2086 inode = d_inode(trgtfile->dentry); 2087 if (inode->i_size < dest_off + len) { 2088 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2089 if (rc) 2090 goto duplicate_extents_out; 2091 2092 /* 2093 * Although also could set plausible allocation size (i_blocks) 2094 * here in addition to setting the file size, in reflink 2095 * it is likely that the target file is sparse. Its allocation 2096 * size will be queried on next revalidate, but it is important 2097 * to make sure that file's cached size is updated immediately 2098 */ 2099 netfs_resize_file(netfs_inode(inode), dest_off + len, true); 2100 cifs_setsize(inode, dest_off + len); 2101 } 2102 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2103 trgtfile->fid.volatile_fid, 2104 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2105 (char *)&dup_ext_buf, 2106 sizeof(struct duplicate_extents_to_file), 2107 CIFSMaxBufSize, NULL, 2108 &ret_data_len); 2109 2110 if (ret_data_len > 0) 2111 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2112 2113 duplicate_extents_out: 2114 if (rc) 2115 trace_smb3_clone_err(xid, srcfile->fid.volatile_fid, 2116 trgtfile->fid.volatile_fid, 2117 tcon->tid, tcon->ses->Suid, src_off, 2118 dest_off, len, rc); 2119 else 2120 trace_smb3_clone_done(xid, srcfile->fid.volatile_fid, 2121 trgtfile->fid.volatile_fid, tcon->tid, 2122 tcon->ses->Suid, src_off, dest_off, len); 2123 return rc; 2124 } 2125 2126 static int 2127 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2128 struct cifsFileInfo *cfile) 2129 { 2130 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2131 cfile->fid.volatile_fid); 2132 } 2133 2134 static int 2135 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2136 struct cifsFileInfo *cfile) 2137 { 2138 struct fsctl_set_integrity_information_req integr_info; 2139 unsigned int ret_data_len; 2140 2141 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2142 integr_info.Flags = 0; 2143 integr_info.Reserved = 0; 2144 2145 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2146 cfile->fid.volatile_fid, 2147 FSCTL_SET_INTEGRITY_INFORMATION, 2148 (char *)&integr_info, 2149 sizeof(struct fsctl_set_integrity_information_req), 2150 CIFSMaxBufSize, NULL, 2151 &ret_data_len); 2152 2153 } 2154 2155 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2156 #define GMT_TOKEN_SIZE 50 2157 2158 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2159 2160 /* 2161 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2162 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2163 */ 2164 static int 2165 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2166 struct cifsFileInfo *cfile, void __user *ioc_buf) 2167 { 2168 char *retbuf = NULL; 2169 unsigned int ret_data_len = 0; 2170 int rc; 2171 u32 max_response_size; 2172 struct smb_snapshot_array snapshot_in; 2173 2174 /* 2175 * On the first query to enumerate the list of snapshots available 2176 * for this volume the buffer begins with 0 (number of snapshots 2177 * which can be returned is zero since at that point we do not know 2178 * how big the buffer needs to be). On the second query, 2179 * it (ret_data_len) is set to number of snapshots so we can 2180 * know to set the maximum response size larger (see below). 2181 */ 2182 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2183 return -EFAULT; 2184 2185 /* 2186 * Note that for snapshot queries that servers like Azure expect that 2187 * the first query be minimal size (and just used to get the number/size 2188 * of previous versions) so response size must be specified as EXACTLY 2189 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2190 * of eight bytes. 2191 */ 2192 if (ret_data_len == 0) 2193 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2194 else 2195 max_response_size = CIFSMaxBufSize; 2196 2197 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2198 cfile->fid.volatile_fid, 2199 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2200 NULL, 0 /* no input data */, max_response_size, 2201 (char **)&retbuf, 2202 &ret_data_len); 2203 cifs_dbg(FYI, "enum snapshots ioctl returned %d and ret buflen is %d\n", 2204 rc, ret_data_len); 2205 if (rc) 2206 return rc; 2207 2208 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2209 /* Fixup buffer */ 2210 if (copy_from_user(&snapshot_in, ioc_buf, 2211 sizeof(struct smb_snapshot_array))) { 2212 rc = -EFAULT; 2213 kfree(retbuf); 2214 return rc; 2215 } 2216 2217 /* 2218 * Check for min size, ie not large enough to fit even one GMT 2219 * token (snapshot). On the first ioctl some users may pass in 2220 * smaller size (or zero) to simply get the size of the array 2221 * so the user space caller can allocate sufficient memory 2222 * and retry the ioctl again with larger array size sufficient 2223 * to hold all of the snapshot GMT tokens on the second try. 2224 */ 2225 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2226 ret_data_len = sizeof(struct smb_snapshot_array); 2227 2228 /* 2229 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2230 * the snapshot array (of 50 byte GMT tokens) each 2231 * representing an available previous version of the data 2232 */ 2233 if (ret_data_len > (snapshot_in.snapshot_array_size + 2234 sizeof(struct smb_snapshot_array))) 2235 ret_data_len = snapshot_in.snapshot_array_size + 2236 sizeof(struct smb_snapshot_array); 2237 2238 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2239 rc = -EFAULT; 2240 } 2241 2242 kfree(retbuf); 2243 return rc; 2244 } 2245 2246 2247 2248 static int 2249 smb3_notify(const unsigned int xid, struct file *pfile, 2250 void __user *ioc_buf, bool return_changes) 2251 { 2252 struct smb3_notify_info notify; 2253 struct smb3_notify_info __user *pnotify_buf; 2254 struct dentry *dentry = pfile->f_path.dentry; 2255 struct inode *inode = file_inode(pfile); 2256 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2257 struct cifs_open_parms oparms; 2258 struct cifs_fid fid; 2259 struct cifs_tcon *tcon; 2260 const unsigned char *path; 2261 char *returned_ioctl_info = NULL; 2262 void *page = alloc_dentry_path(); 2263 __le16 *utf16_path = NULL; 2264 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2265 int rc = 0; 2266 __u32 ret_len = 0; 2267 2268 path = build_path_from_dentry(dentry, page); 2269 if (IS_ERR(path)) { 2270 rc = PTR_ERR(path); 2271 goto notify_exit; 2272 } 2273 2274 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2275 if (utf16_path == NULL) { 2276 rc = -ENOMEM; 2277 goto notify_exit; 2278 } 2279 2280 if (return_changes) { 2281 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2282 rc = -EFAULT; 2283 goto notify_exit; 2284 } 2285 } else { 2286 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2287 rc = -EFAULT; 2288 goto notify_exit; 2289 } 2290 notify.data_len = 0; 2291 } 2292 2293 tcon = cifs_sb_master_tcon(cifs_sb); 2294 oparms = (struct cifs_open_parms) { 2295 .tcon = tcon, 2296 .path = path, 2297 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2298 .disposition = FILE_OPEN, 2299 .create_options = cifs_create_options(cifs_sb, 0), 2300 .fid = &fid, 2301 }; 2302 2303 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2304 NULL); 2305 if (rc) 2306 goto notify_exit; 2307 2308 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2309 notify.watch_tree, notify.completion_filter, 2310 notify.data_len, &returned_ioctl_info, &ret_len); 2311 2312 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2313 2314 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2315 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2316 if (ret_len > notify.data_len) 2317 ret_len = notify.data_len; 2318 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2319 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2320 rc = -EFAULT; 2321 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2322 rc = -EFAULT; 2323 } 2324 kfree(returned_ioctl_info); 2325 notify_exit: 2326 free_dentry_path(page); 2327 kfree(utf16_path); 2328 return rc; 2329 } 2330 2331 static int 2332 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2333 const char *path, struct cifs_sb_info *cifs_sb, 2334 struct cifs_fid *fid, __u16 search_flags, 2335 struct cifs_search_info *srch_inf) 2336 { 2337 __le16 *utf16_path; 2338 struct smb_rqst rqst[2]; 2339 struct kvec rsp_iov[2]; 2340 int resp_buftype[2]; 2341 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2342 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2343 int rc, flags = 0; 2344 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2345 struct cifs_open_parms oparms; 2346 struct smb2_query_directory_rsp *qd_rsp = NULL; 2347 struct smb2_create_rsp *op_rsp = NULL; 2348 struct TCP_Server_Info *server; 2349 int retries = 0, cur_sleep = 1; 2350 2351 replay_again: 2352 /* reinitialize for possible replay */ 2353 flags = 0; 2354 oplock = SMB2_OPLOCK_LEVEL_NONE; 2355 server = cifs_pick_channel(tcon->ses); 2356 2357 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2358 if (!utf16_path) 2359 return -ENOMEM; 2360 2361 if (smb3_encryption_required(tcon)) 2362 flags |= CIFS_TRANSFORM_REQ; 2363 2364 memset(rqst, 0, sizeof(rqst)); 2365 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2366 memset(rsp_iov, 0, sizeof(rsp_iov)); 2367 2368 /* Open */ 2369 memset(&open_iov, 0, sizeof(open_iov)); 2370 rqst[0].rq_iov = open_iov; 2371 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2372 2373 oparms = (struct cifs_open_parms) { 2374 .tcon = tcon, 2375 .path = path, 2376 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2377 .disposition = FILE_OPEN, 2378 .create_options = cifs_create_options(cifs_sb, 0), 2379 .fid = fid, 2380 .replay = !!(retries), 2381 }; 2382 2383 rc = SMB2_open_init(tcon, server, 2384 &rqst[0], &oplock, &oparms, utf16_path); 2385 if (rc) 2386 goto qdf_free; 2387 smb2_set_next_command(tcon, &rqst[0]); 2388 2389 /* Query directory */ 2390 srch_inf->entries_in_buffer = 0; 2391 srch_inf->index_of_last_entry = 2; 2392 2393 memset(&qd_iov, 0, sizeof(qd_iov)); 2394 rqst[1].rq_iov = qd_iov; 2395 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2396 2397 rc = SMB2_query_directory_init(xid, tcon, server, 2398 &rqst[1], 2399 COMPOUND_FID, COMPOUND_FID, 2400 0, srch_inf->info_level); 2401 if (rc) 2402 goto qdf_free; 2403 2404 smb2_set_related(&rqst[1]); 2405 2406 if (retries) { 2407 smb2_set_replay(server, &rqst[0]); 2408 smb2_set_replay(server, &rqst[1]); 2409 } 2410 2411 rc = compound_send_recv(xid, tcon->ses, server, 2412 flags, 2, rqst, 2413 resp_buftype, rsp_iov); 2414 2415 /* If the open failed there is nothing to do */ 2416 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2417 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2418 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2419 goto qdf_free; 2420 } 2421 fid->persistent_fid = op_rsp->PersistentFileId; 2422 fid->volatile_fid = op_rsp->VolatileFileId; 2423 2424 /* Anything else than ENODATA means a genuine error */ 2425 if (rc && rc != -ENODATA) { 2426 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2427 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2428 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2429 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2430 goto qdf_free; 2431 } 2432 2433 atomic_inc(&tcon->num_remote_opens); 2434 2435 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2436 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2437 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2438 tcon->tid, tcon->ses->Suid, 0, 0); 2439 srch_inf->endOfSearch = true; 2440 rc = 0; 2441 goto qdf_free; 2442 } 2443 2444 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2445 srch_inf); 2446 if (rc) { 2447 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2448 tcon->ses->Suid, 0, 0, rc); 2449 goto qdf_free; 2450 } 2451 resp_buftype[1] = CIFS_NO_BUFFER; 2452 2453 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2454 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2455 2456 qdf_free: 2457 kfree(utf16_path); 2458 SMB2_open_free(&rqst[0]); 2459 SMB2_query_directory_free(&rqst[1]); 2460 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2461 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2462 2463 if (is_replayable_error(rc) && 2464 smb2_should_replay(tcon, &retries, &cur_sleep)) 2465 goto replay_again; 2466 2467 return rc; 2468 } 2469 2470 static int 2471 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2472 struct cifs_fid *fid, __u16 search_flags, 2473 struct cifs_search_info *srch_inf) 2474 { 2475 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2476 fid->volatile_fid, 0, srch_inf); 2477 } 2478 2479 static int 2480 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2481 struct cifs_fid *fid) 2482 { 2483 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2484 } 2485 2486 /* 2487 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2488 * the number of credits and return true. Otherwise - return false. 2489 */ 2490 static bool 2491 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2492 { 2493 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2494 int scredits, in_flight; 2495 2496 if (shdr->Status != STATUS_PENDING) 2497 return false; 2498 2499 if (shdr->CreditRequest) { 2500 spin_lock(&server->req_lock); 2501 server->credits += le16_to_cpu(shdr->CreditRequest); 2502 scredits = server->credits; 2503 in_flight = server->in_flight; 2504 spin_unlock(&server->req_lock); 2505 wake_up(&server->request_q); 2506 2507 trace_smb3_pend_credits(server->current_mid, 2508 server->conn_id, server->hostname, scredits, 2509 le16_to_cpu(shdr->CreditRequest), in_flight); 2510 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2511 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2512 } 2513 2514 return true; 2515 } 2516 2517 static bool 2518 smb2_is_session_expired(char *buf) 2519 { 2520 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2521 2522 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2523 shdr->Status != STATUS_USER_SESSION_DELETED) 2524 return false; 2525 2526 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2527 le64_to_cpu(shdr->SessionId), 2528 le16_to_cpu(shdr->Command), 2529 le64_to_cpu(shdr->MessageId)); 2530 cifs_dbg(FYI, "Session expired or deleted\n"); 2531 2532 return true; 2533 } 2534 2535 static bool 2536 smb2_is_status_io_timeout(char *buf) 2537 { 2538 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2539 2540 if (shdr->Status == STATUS_IO_TIMEOUT) 2541 return true; 2542 else 2543 return false; 2544 } 2545 2546 static bool 2547 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2548 { 2549 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2550 struct TCP_Server_Info *pserver; 2551 struct cifs_ses *ses; 2552 struct cifs_tcon *tcon; 2553 2554 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2555 return false; 2556 2557 /* If server is a channel, select the primary channel */ 2558 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2559 2560 spin_lock(&cifs_tcp_ses_lock); 2561 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2562 if (cifs_ses_exiting(ses)) 2563 continue; 2564 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2565 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2566 spin_lock(&tcon->tc_lock); 2567 tcon->need_reconnect = true; 2568 spin_unlock(&tcon->tc_lock); 2569 spin_unlock(&cifs_tcp_ses_lock); 2570 pr_warn_once("Server share %s deleted.\n", 2571 tcon->tree_name); 2572 return true; 2573 } 2574 } 2575 } 2576 spin_unlock(&cifs_tcp_ses_lock); 2577 2578 return false; 2579 } 2580 2581 static int 2582 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2583 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2584 { 2585 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2586 return SMB2_lease_break(0, tcon, cinode->lease_key, 2587 smb2_get_lease_state(cinode)); 2588 2589 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2590 CIFS_CACHE_READ(cinode) ? 1 : 0); 2591 } 2592 2593 void 2594 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2595 { 2596 struct smb2_hdr *shdr; 2597 2598 if (server->dialect < SMB30_PROT_ID) 2599 return; 2600 2601 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2602 if (shdr == NULL) { 2603 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2604 return; 2605 } 2606 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2607 } 2608 2609 void 2610 smb2_set_related(struct smb_rqst *rqst) 2611 { 2612 struct smb2_hdr *shdr; 2613 2614 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2615 if (shdr == NULL) { 2616 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2617 return; 2618 } 2619 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2620 } 2621 2622 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2623 2624 void 2625 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2626 { 2627 struct smb2_hdr *shdr; 2628 struct cifs_ses *ses = tcon->ses; 2629 struct TCP_Server_Info *server = ses->server; 2630 unsigned long len = smb_rqst_len(server, rqst); 2631 int num_padding; 2632 2633 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2634 if (shdr == NULL) { 2635 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2636 return; 2637 } 2638 2639 /* SMB headers in a compound are 8 byte aligned. */ 2640 if (IS_ALIGNED(len, 8)) 2641 goto out; 2642 2643 num_padding = 8 - (len & 7); 2644 if (smb3_encryption_required(tcon)) { 2645 int i; 2646 2647 /* 2648 * Flatten request into a single buffer with required padding as 2649 * the encryption layer can't handle the padding iovs. 2650 */ 2651 for (i = 1; i < rqst->rq_nvec; i++) { 2652 memcpy(rqst->rq_iov[0].iov_base + 2653 rqst->rq_iov[0].iov_len, 2654 rqst->rq_iov[i].iov_base, 2655 rqst->rq_iov[i].iov_len); 2656 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2657 } 2658 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2659 0, num_padding); 2660 rqst->rq_iov[0].iov_len += num_padding; 2661 rqst->rq_nvec = 1; 2662 } else { 2663 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2664 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2665 rqst->rq_nvec++; 2666 } 2667 len += num_padding; 2668 out: 2669 shdr->NextCommand = cpu_to_le32(len); 2670 } 2671 2672 /* 2673 * helper function for exponential backoff and check if replayable 2674 */ 2675 bool smb2_should_replay(struct cifs_tcon *tcon, 2676 int *pretries, 2677 int *pcur_sleep) 2678 { 2679 if (!pretries || !pcur_sleep) 2680 return false; 2681 2682 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2683 msleep(*pcur_sleep); 2684 (*pcur_sleep) = ((*pcur_sleep) << 1); 2685 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2686 (*pcur_sleep) = CIFS_MAX_SLEEP; 2687 return true; 2688 } 2689 2690 return false; 2691 } 2692 2693 /* 2694 * Passes the query info response back to the caller on success. 2695 * Caller need to free this with free_rsp_buf(). 2696 */ 2697 int 2698 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2699 const char *path, u32 desired_access, 2700 u32 class, u32 type, u32 output_len, 2701 struct kvec *rsp, int *buftype, 2702 struct cifs_sb_info *cifs_sb) 2703 { 2704 struct smb2_compound_vars *vars; 2705 struct cifs_ses *ses = tcon->ses; 2706 struct TCP_Server_Info *server; 2707 int flags = CIFS_CP_CREATE_CLOSE_OP; 2708 struct smb_rqst *rqst; 2709 int resp_buftype[3]; 2710 struct kvec *rsp_iov; 2711 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2712 struct cifs_open_parms oparms; 2713 struct cifs_fid fid; 2714 int rc; 2715 __le16 *utf16_path; 2716 struct cached_fid *cfid = NULL; 2717 int retries = 0, cur_sleep = 1; 2718 2719 replay_again: 2720 /* reinitialize for possible replay */ 2721 flags = CIFS_CP_CREATE_CLOSE_OP; 2722 oplock = SMB2_OPLOCK_LEVEL_NONE; 2723 server = cifs_pick_channel(ses); 2724 2725 if (!path) 2726 path = ""; 2727 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2728 if (!utf16_path) 2729 return -ENOMEM; 2730 2731 if (smb3_encryption_required(tcon)) 2732 flags |= CIFS_TRANSFORM_REQ; 2733 2734 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2735 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2736 if (!vars) { 2737 rc = -ENOMEM; 2738 goto out_free_path; 2739 } 2740 rqst = vars->rqst; 2741 rsp_iov = vars->rsp_iov; 2742 2743 /* 2744 * We can only call this for things we know are directories. 2745 */ 2746 if (!strcmp(path, "")) 2747 open_cached_dir(xid, tcon, path, cifs_sb, false, 2748 &cfid); /* cfid null if open dir failed */ 2749 2750 rqst[0].rq_iov = vars->open_iov; 2751 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2752 2753 oparms = (struct cifs_open_parms) { 2754 .tcon = tcon, 2755 .path = path, 2756 .desired_access = desired_access, 2757 .disposition = FILE_OPEN, 2758 .create_options = cifs_create_options(cifs_sb, 0), 2759 .fid = &fid, 2760 .replay = !!(retries), 2761 }; 2762 2763 rc = SMB2_open_init(tcon, server, 2764 &rqst[0], &oplock, &oparms, utf16_path); 2765 if (rc) 2766 goto qic_exit; 2767 smb2_set_next_command(tcon, &rqst[0]); 2768 2769 rqst[1].rq_iov = &vars->qi_iov; 2770 rqst[1].rq_nvec = 1; 2771 2772 if (cfid) { 2773 rc = SMB2_query_info_init(tcon, server, 2774 &rqst[1], 2775 cfid->fid.persistent_fid, 2776 cfid->fid.volatile_fid, 2777 class, type, 0, 2778 output_len, 0, 2779 NULL); 2780 } else { 2781 rc = SMB2_query_info_init(tcon, server, 2782 &rqst[1], 2783 COMPOUND_FID, 2784 COMPOUND_FID, 2785 class, type, 0, 2786 output_len, 0, 2787 NULL); 2788 } 2789 if (rc) 2790 goto qic_exit; 2791 if (!cfid) { 2792 smb2_set_next_command(tcon, &rqst[1]); 2793 smb2_set_related(&rqst[1]); 2794 } 2795 2796 rqst[2].rq_iov = &vars->close_iov; 2797 rqst[2].rq_nvec = 1; 2798 2799 rc = SMB2_close_init(tcon, server, 2800 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2801 if (rc) 2802 goto qic_exit; 2803 smb2_set_related(&rqst[2]); 2804 2805 if (retries) { 2806 if (!cfid) { 2807 smb2_set_replay(server, &rqst[0]); 2808 smb2_set_replay(server, &rqst[2]); 2809 } 2810 smb2_set_replay(server, &rqst[1]); 2811 } 2812 2813 if (cfid) { 2814 rc = compound_send_recv(xid, ses, server, 2815 flags, 1, &rqst[1], 2816 &resp_buftype[1], &rsp_iov[1]); 2817 } else { 2818 rc = compound_send_recv(xid, ses, server, 2819 flags, 3, rqst, 2820 resp_buftype, rsp_iov); 2821 } 2822 if (rc) { 2823 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2824 if (rc == -EREMCHG) { 2825 tcon->need_reconnect = true; 2826 pr_warn_once("server share %s deleted\n", 2827 tcon->tree_name); 2828 } 2829 goto qic_exit; 2830 } 2831 *rsp = rsp_iov[1]; 2832 *buftype = resp_buftype[1]; 2833 2834 qic_exit: 2835 SMB2_open_free(&rqst[0]); 2836 SMB2_query_info_free(&rqst[1]); 2837 SMB2_close_free(&rqst[2]); 2838 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2839 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2840 if (cfid) 2841 close_cached_dir(cfid); 2842 kfree(vars); 2843 out_free_path: 2844 kfree(utf16_path); 2845 2846 if (is_replayable_error(rc) && 2847 smb2_should_replay(tcon, &retries, &cur_sleep)) 2848 goto replay_again; 2849 2850 return rc; 2851 } 2852 2853 static int 2854 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2855 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2856 { 2857 struct smb2_query_info_rsp *rsp; 2858 struct smb2_fs_full_size_info *info = NULL; 2859 struct kvec rsp_iov = {NULL, 0}; 2860 int buftype = CIFS_NO_BUFFER; 2861 int rc; 2862 2863 2864 rc = smb2_query_info_compound(xid, tcon, path, 2865 FILE_READ_ATTRIBUTES, 2866 FS_FULL_SIZE_INFORMATION, 2867 SMB2_O_INFO_FILESYSTEM, 2868 sizeof(struct smb2_fs_full_size_info), 2869 &rsp_iov, &buftype, cifs_sb); 2870 if (rc) 2871 goto qfs_exit; 2872 2873 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2874 buf->f_type = SMB2_SUPER_MAGIC; 2875 info = (struct smb2_fs_full_size_info *)( 2876 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2877 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2878 le32_to_cpu(rsp->OutputBufferLength), 2879 &rsp_iov, 2880 sizeof(struct smb2_fs_full_size_info)); 2881 if (!rc) 2882 smb2_copy_fs_info_to_kstatfs(info, buf); 2883 2884 qfs_exit: 2885 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2886 free_rsp_buf(buftype, rsp_iov.iov_base); 2887 return rc; 2888 } 2889 2890 static int 2891 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2892 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2893 { 2894 int rc; 2895 __le16 *utf16_path = NULL; 2896 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2897 struct cifs_open_parms oparms; 2898 struct cifs_fid fid; 2899 2900 if (!tcon->posix_extensions) 2901 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2902 2903 oparms = (struct cifs_open_parms) { 2904 .tcon = tcon, 2905 .path = path, 2906 .desired_access = FILE_READ_ATTRIBUTES, 2907 .disposition = FILE_OPEN, 2908 .create_options = cifs_create_options(cifs_sb, 0), 2909 .fid = &fid, 2910 }; 2911 2912 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2913 if (utf16_path == NULL) 2914 return -ENOMEM; 2915 2916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 2917 NULL, NULL); 2918 kfree(utf16_path); 2919 if (rc) 2920 return rc; 2921 2922 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2923 fid.volatile_fid, buf); 2924 buf->f_type = SMB2_SUPER_MAGIC; 2925 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2926 return rc; 2927 } 2928 2929 static bool 2930 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2931 { 2932 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2933 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2934 } 2935 2936 static int 2937 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2938 __u64 length, __u32 type, int lock, int unlock, bool wait) 2939 { 2940 if (unlock && !lock) 2941 type = SMB2_LOCKFLAG_UNLOCK; 2942 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2943 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2944 current->tgid, length, offset, type, wait); 2945 } 2946 2947 static void 2948 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2949 { 2950 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2951 } 2952 2953 static void 2954 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2955 { 2956 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2957 } 2958 2959 static void 2960 smb2_new_lease_key(struct cifs_fid *fid) 2961 { 2962 generate_random_uuid(fid->lease_key); 2963 } 2964 2965 static int 2966 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2967 const char *search_name, 2968 struct dfs_info3_param **target_nodes, 2969 unsigned int *num_of_nodes, 2970 const struct nls_table *nls_codepage, int remap) 2971 { 2972 int rc; 2973 __le16 *utf16_path = NULL; 2974 int utf16_path_len = 0; 2975 struct cifs_tcon *tcon; 2976 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2977 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2978 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2979 int retry_once = 0; 2980 2981 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2982 2983 /* 2984 * Try to use the IPC tcon, otherwise just use any 2985 */ 2986 tcon = ses->tcon_ipc; 2987 if (tcon == NULL) { 2988 spin_lock(&cifs_tcp_ses_lock); 2989 tcon = list_first_entry_or_null(&ses->tcon_list, 2990 struct cifs_tcon, 2991 tcon_list); 2992 if (tcon) { 2993 tcon->tc_count++; 2994 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2995 netfs_trace_tcon_ref_get_dfs_refer); 2996 } 2997 spin_unlock(&cifs_tcp_ses_lock); 2998 } 2999 3000 if (tcon == NULL) { 3001 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 3002 ses); 3003 rc = -ENOTCONN; 3004 goto out; 3005 } 3006 3007 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 3008 &utf16_path_len, 3009 nls_codepage, remap); 3010 if (!utf16_path) { 3011 rc = -ENOMEM; 3012 goto out; 3013 } 3014 3015 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 3016 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 3017 if (!dfs_req) { 3018 rc = -ENOMEM; 3019 goto out; 3020 } 3021 3022 /* Highest DFS referral version understood */ 3023 dfs_req->MaxReferralLevel = DFS_VERSION; 3024 3025 /* Path to resolve in an UTF-16 null-terminated string */ 3026 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 3027 3028 for (;;) { 3029 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 3030 FSCTL_DFS_GET_REFERRALS, 3031 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 3032 (char **)&dfs_rsp, &dfs_rsp_size); 3033 if (fatal_signal_pending(current)) { 3034 rc = -EINTR; 3035 break; 3036 } 3037 if (!is_retryable_error(rc) || retry_once++) 3038 break; 3039 usleep_range(512, 2048); 3040 } 3041 3042 if (!rc && !dfs_rsp) 3043 rc = -EIO; 3044 if (rc) { 3045 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 3046 cifs_tcon_dbg(FYI, "%s: ioctl error: rc=%d\n", __func__, rc); 3047 goto out; 3048 } 3049 3050 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 3051 num_of_nodes, target_nodes, 3052 nls_codepage, remap, search_name, 3053 true /* is_unicode */); 3054 if (rc && rc != -ENOENT) { 3055 cifs_tcon_dbg(VFS, "%s: failed to parse DFS referral %s: %d\n", 3056 __func__, search_name, rc); 3057 } 3058 3059 out: 3060 if (tcon && !tcon->ipc) { 3061 /* ipc tcons are not refcounted */ 3062 spin_lock(&cifs_tcp_ses_lock); 3063 tcon->tc_count--; 3064 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3065 netfs_trace_tcon_ref_dec_dfs_refer); 3066 /* tc_count can never go negative */ 3067 WARN_ON(tcon->tc_count < 0); 3068 spin_unlock(&cifs_tcp_ses_lock); 3069 } 3070 kfree(utf16_path); 3071 kfree(dfs_req); 3072 kfree(dfs_rsp); 3073 return rc; 3074 } 3075 3076 static struct smb_ntsd * 3077 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3078 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3079 { 3080 struct smb_ntsd *pntsd = NULL; 3081 unsigned int xid; 3082 int rc = -EOPNOTSUPP; 3083 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3084 3085 if (IS_ERR(tlink)) 3086 return ERR_CAST(tlink); 3087 3088 xid = get_xid(); 3089 cifs_dbg(FYI, "trying to get acl\n"); 3090 3091 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3092 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3093 info); 3094 free_xid(xid); 3095 3096 cifs_put_tlink(tlink); 3097 3098 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3099 if (rc) 3100 return ERR_PTR(rc); 3101 return pntsd; 3102 3103 } 3104 3105 static struct smb_ntsd * 3106 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3107 const char *path, u32 *pacllen, u32 info) 3108 { 3109 struct smb_ntsd *pntsd = NULL; 3110 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3111 unsigned int xid; 3112 int rc; 3113 struct cifs_tcon *tcon; 3114 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3115 struct cifs_fid fid; 3116 struct cifs_open_parms oparms; 3117 __le16 *utf16_path; 3118 3119 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3120 if (IS_ERR(tlink)) 3121 return ERR_CAST(tlink); 3122 3123 tcon = tlink_tcon(tlink); 3124 xid = get_xid(); 3125 3126 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3127 if (!utf16_path) { 3128 rc = -ENOMEM; 3129 free_xid(xid); 3130 return ERR_PTR(rc); 3131 } 3132 3133 oparms = (struct cifs_open_parms) { 3134 .tcon = tcon, 3135 .path = path, 3136 .desired_access = READ_CONTROL, 3137 .disposition = FILE_OPEN, 3138 /* 3139 * When querying an ACL, even if the file is a symlink 3140 * we want to open the source not the target, and so 3141 * the protocol requires that the client specify this 3142 * flag when opening a reparse point 3143 */ 3144 .create_options = cifs_create_options(cifs_sb, 0) | 3145 OPEN_REPARSE_POINT, 3146 .fid = &fid, 3147 }; 3148 3149 if (info & SACL_SECINFO) 3150 oparms.desired_access |= SYSTEM_SECURITY; 3151 3152 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3153 NULL); 3154 kfree(utf16_path); 3155 if (!rc) { 3156 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3157 fid.volatile_fid, (void **)&pntsd, pacllen, 3158 info); 3159 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3160 } 3161 3162 cifs_put_tlink(tlink); 3163 free_xid(xid); 3164 3165 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3166 if (rc) 3167 return ERR_PTR(rc); 3168 return pntsd; 3169 } 3170 3171 static int 3172 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, 3173 struct inode *inode, const char *path, int aclflag) 3174 { 3175 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3176 unsigned int xid; 3177 int rc, access_flags = 0; 3178 struct cifs_tcon *tcon; 3179 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3180 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3181 struct cifs_fid fid; 3182 struct cifs_open_parms oparms; 3183 __le16 *utf16_path; 3184 3185 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3186 if (IS_ERR(tlink)) 3187 return PTR_ERR(tlink); 3188 3189 tcon = tlink_tcon(tlink); 3190 xid = get_xid(); 3191 3192 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3193 access_flags |= WRITE_OWNER; 3194 if (aclflag & CIFS_ACL_SACL) 3195 access_flags |= SYSTEM_SECURITY; 3196 if (aclflag & CIFS_ACL_DACL) 3197 access_flags |= WRITE_DAC; 3198 3199 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3200 if (!utf16_path) { 3201 rc = -ENOMEM; 3202 free_xid(xid); 3203 return rc; 3204 } 3205 3206 oparms = (struct cifs_open_parms) { 3207 .tcon = tcon, 3208 .desired_access = access_flags, 3209 .create_options = cifs_create_options(cifs_sb, 0), 3210 .disposition = FILE_OPEN, 3211 .path = path, 3212 .fid = &fid, 3213 }; 3214 3215 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3216 NULL, NULL); 3217 kfree(utf16_path); 3218 if (!rc) { 3219 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3220 fid.volatile_fid, pnntsd, acllen, aclflag); 3221 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3222 } 3223 3224 cifs_put_tlink(tlink); 3225 free_xid(xid); 3226 return rc; 3227 } 3228 3229 /* Retrieve an ACL from the server */ 3230 static struct smb_ntsd * 3231 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3232 struct inode *inode, const char *path, 3233 u32 *pacllen, u32 info) 3234 { 3235 struct smb_ntsd *pntsd = NULL; 3236 struct cifsFileInfo *open_file = NULL; 3237 3238 if (inode && !(info & SACL_SECINFO)) 3239 open_file = find_readable_file(CIFS_I(inode), true); 3240 if (!open_file || (info & SACL_SECINFO)) 3241 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3242 3243 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3244 cifsFileInfo_put(open_file); 3245 return pntsd; 3246 } 3247 3248 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3249 loff_t offset, loff_t len, unsigned int xid) 3250 { 3251 struct cifsFileInfo *cfile = file->private_data; 3252 struct file_zero_data_information fsctl_buf; 3253 3254 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3255 3256 fsctl_buf.FileOffset = cpu_to_le64(offset); 3257 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3258 3259 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3260 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3261 (char *)&fsctl_buf, 3262 sizeof(struct file_zero_data_information), 3263 0, NULL, NULL); 3264 } 3265 3266 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3267 unsigned long long offset, unsigned long long len, 3268 bool keep_size) 3269 { 3270 struct cifs_ses *ses = tcon->ses; 3271 struct inode *inode = file_inode(file); 3272 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3273 struct cifsFileInfo *cfile = file->private_data; 3274 struct netfs_inode *ictx = netfs_inode(inode); 3275 unsigned long long i_size, new_size, remote_size; 3276 long rc; 3277 unsigned int xid; 3278 3279 xid = get_xid(); 3280 3281 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3282 ses->Suid, offset, len); 3283 3284 inode_lock(inode); 3285 filemap_invalidate_lock(inode->i_mapping); 3286 3287 i_size = i_size_read(inode); 3288 remote_size = ictx->remote_i_size; 3289 if (offset + len >= remote_size && offset < i_size) { 3290 unsigned long long top = umin(offset + len, i_size); 3291 3292 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3293 if (rc < 0) 3294 goto zero_range_exit; 3295 } 3296 3297 /* 3298 * We zero the range through ioctl, so we need remove the page caches 3299 * first, otherwise the data may be inconsistent with the server. 3300 */ 3301 truncate_pagecache_range(inode, offset, offset + len - 1); 3302 3303 /* if file not oplocked can't be sure whether asking to extend size */ 3304 rc = -EOPNOTSUPP; 3305 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3306 goto zero_range_exit; 3307 3308 rc = smb3_zero_data(file, tcon, offset, len, xid); 3309 if (rc < 0) 3310 goto zero_range_exit; 3311 3312 /* 3313 * do we also need to change the size of the file? 3314 */ 3315 new_size = offset + len; 3316 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3317 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3318 cfile->fid.volatile_fid, cfile->pid, new_size); 3319 if (rc >= 0) { 3320 truncate_setsize(inode, new_size); 3321 netfs_resize_file(&cifsi->netfs, new_size, true); 3322 if (offset < cifsi->netfs.zero_point) 3323 cifsi->netfs.zero_point = offset; 3324 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3325 } 3326 } 3327 3328 zero_range_exit: 3329 filemap_invalidate_unlock(inode->i_mapping); 3330 inode_unlock(inode); 3331 free_xid(xid); 3332 if (rc) 3333 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3334 ses->Suid, offset, len, rc); 3335 else 3336 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3337 ses->Suid, offset, len); 3338 return rc; 3339 } 3340 3341 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3342 loff_t offset, loff_t len) 3343 { 3344 struct inode *inode = file_inode(file); 3345 struct cifsFileInfo *cfile = file->private_data; 3346 struct file_zero_data_information fsctl_buf; 3347 unsigned long long end = offset + len, i_size, remote_i_size; 3348 long rc; 3349 unsigned int xid; 3350 __u8 set_sparse = 1; 3351 3352 xid = get_xid(); 3353 3354 inode_lock(inode); 3355 /* Need to make file sparse, if not already, before freeing range. */ 3356 /* Consider adding equivalent for compressed since it could also work */ 3357 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3358 rc = -EOPNOTSUPP; 3359 goto out; 3360 } 3361 3362 filemap_invalidate_lock(inode->i_mapping); 3363 /* 3364 * We implement the punch hole through ioctl, so we need remove the page 3365 * caches first, otherwise the data may be inconsistent with the server. 3366 */ 3367 truncate_pagecache_range(inode, offset, offset + len - 1); 3368 3369 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3370 3371 fsctl_buf.FileOffset = cpu_to_le64(offset); 3372 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3373 3374 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3375 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3376 (char *)&fsctl_buf, 3377 sizeof(struct file_zero_data_information), 3378 CIFSMaxBufSize, NULL, NULL); 3379 3380 if (rc) 3381 goto unlock; 3382 3383 /* If there's dirty data in the buffer that would extend the EOF if it 3384 * were written, then we need to move the EOF marker over to the lower 3385 * of the high end of the hole and the proposed EOF. The problem is 3386 * that we locally hole-punch the tail of the dirty data, the proposed 3387 * EOF update will end up in the wrong place. 3388 */ 3389 i_size = i_size_read(inode); 3390 remote_i_size = netfs_inode(inode)->remote_i_size; 3391 if (end > remote_i_size && i_size > remote_i_size) { 3392 unsigned long long extend_to = umin(end, i_size); 3393 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3394 cfile->fid.volatile_fid, cfile->pid, extend_to); 3395 if (rc >= 0) 3396 netfs_inode(inode)->remote_i_size = extend_to; 3397 } 3398 3399 unlock: 3400 filemap_invalidate_unlock(inode->i_mapping); 3401 out: 3402 inode_unlock(inode); 3403 free_xid(xid); 3404 return rc; 3405 } 3406 3407 static int smb3_simple_fallocate_write_range(unsigned int xid, 3408 struct cifs_tcon *tcon, 3409 struct cifsFileInfo *cfile, 3410 loff_t off, loff_t len, 3411 char *buf) 3412 { 3413 struct cifs_io_parms io_parms = {0}; 3414 int nbytes; 3415 int rc = 0; 3416 struct kvec iov[2]; 3417 3418 io_parms.netfid = cfile->fid.netfid; 3419 io_parms.pid = current->tgid; 3420 io_parms.tcon = tcon; 3421 io_parms.persistent_fid = cfile->fid.persistent_fid; 3422 io_parms.volatile_fid = cfile->fid.volatile_fid; 3423 3424 while (len) { 3425 io_parms.offset = off; 3426 io_parms.length = len; 3427 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3428 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3429 /* iov[0] is reserved for smb header */ 3430 iov[1].iov_base = buf; 3431 iov[1].iov_len = io_parms.length; 3432 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3433 if (rc) 3434 break; 3435 if (nbytes > len) 3436 return -EINVAL; 3437 buf += nbytes; 3438 off += nbytes; 3439 len -= nbytes; 3440 } 3441 return rc; 3442 } 3443 3444 static int smb3_simple_fallocate_range(unsigned int xid, 3445 struct cifs_tcon *tcon, 3446 struct cifsFileInfo *cfile, 3447 loff_t off, loff_t len) 3448 { 3449 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3450 u32 out_data_len; 3451 char *buf = NULL; 3452 loff_t l; 3453 int rc; 3454 3455 in_data.file_offset = cpu_to_le64(off); 3456 in_data.length = cpu_to_le64(len); 3457 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3458 cfile->fid.volatile_fid, 3459 FSCTL_QUERY_ALLOCATED_RANGES, 3460 (char *)&in_data, sizeof(in_data), 3461 1024 * sizeof(struct file_allocated_range_buffer), 3462 (char **)&out_data, &out_data_len); 3463 if (rc) 3464 goto out; 3465 3466 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3467 if (buf == NULL) { 3468 rc = -ENOMEM; 3469 goto out; 3470 } 3471 3472 tmp_data = out_data; 3473 while (len) { 3474 /* 3475 * The rest of the region is unmapped so write it all. 3476 */ 3477 if (out_data_len == 0) { 3478 rc = smb3_simple_fallocate_write_range(xid, tcon, 3479 cfile, off, len, buf); 3480 goto out; 3481 } 3482 3483 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3484 rc = -EINVAL; 3485 goto out; 3486 } 3487 3488 if (off < le64_to_cpu(tmp_data->file_offset)) { 3489 /* 3490 * We are at a hole. Write until the end of the region 3491 * or until the next allocated data, 3492 * whichever comes next. 3493 */ 3494 l = le64_to_cpu(tmp_data->file_offset) - off; 3495 if (len < l) 3496 l = len; 3497 rc = smb3_simple_fallocate_write_range(xid, tcon, 3498 cfile, off, l, buf); 3499 if (rc) 3500 goto out; 3501 off = off + l; 3502 len = len - l; 3503 if (len == 0) 3504 goto out; 3505 } 3506 /* 3507 * We are at a section of allocated data, just skip forward 3508 * until the end of the data or the end of the region 3509 * we are supposed to fallocate, whichever comes first. 3510 */ 3511 l = le64_to_cpu(tmp_data->length); 3512 if (len < l) 3513 l = len; 3514 off += l; 3515 len -= l; 3516 3517 tmp_data = &tmp_data[1]; 3518 out_data_len -= sizeof(struct file_allocated_range_buffer); 3519 } 3520 3521 out: 3522 kfree(out_data); 3523 kfree(buf); 3524 return rc; 3525 } 3526 3527 3528 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3529 loff_t off, loff_t len, bool keep_size) 3530 { 3531 struct inode *inode; 3532 struct cifsInodeInfo *cifsi; 3533 struct cifsFileInfo *cfile = file->private_data; 3534 long rc = -EOPNOTSUPP; 3535 unsigned int xid; 3536 loff_t new_eof; 3537 3538 xid = get_xid(); 3539 3540 inode = d_inode(cfile->dentry); 3541 cifsi = CIFS_I(inode); 3542 3543 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3544 tcon->ses->Suid, off, len); 3545 /* if file not oplocked can't be sure whether asking to extend size */ 3546 if (!CIFS_CACHE_READ(cifsi)) 3547 if (keep_size == false) { 3548 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3549 tcon->tid, tcon->ses->Suid, off, len, rc); 3550 free_xid(xid); 3551 return rc; 3552 } 3553 3554 /* 3555 * Extending the file 3556 */ 3557 if ((keep_size == false) && i_size_read(inode) < off + len) { 3558 rc = inode_newsize_ok(inode, off + len); 3559 if (rc) 3560 goto out; 3561 3562 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3563 smb2_set_sparse(xid, tcon, cfile, inode, false); 3564 3565 new_eof = off + len; 3566 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3567 cfile->fid.volatile_fid, cfile->pid, new_eof); 3568 if (rc == 0) { 3569 netfs_resize_file(&cifsi->netfs, new_eof, true); 3570 cifs_setsize(inode, new_eof); 3571 } 3572 goto out; 3573 } 3574 3575 /* 3576 * Files are non-sparse by default so falloc may be a no-op 3577 * Must check if file sparse. If not sparse, and since we are not 3578 * extending then no need to do anything since file already allocated 3579 */ 3580 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3581 rc = 0; 3582 goto out; 3583 } 3584 3585 if (keep_size == true) { 3586 /* 3587 * We can not preallocate pages beyond the end of the file 3588 * in SMB2 3589 */ 3590 if (off >= i_size_read(inode)) { 3591 rc = 0; 3592 goto out; 3593 } 3594 /* 3595 * For fallocates that are partially beyond the end of file, 3596 * clamp len so we only fallocate up to the end of file. 3597 */ 3598 if (off + len > i_size_read(inode)) { 3599 len = i_size_read(inode) - off; 3600 } 3601 } 3602 3603 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3604 /* 3605 * At this point, we are trying to fallocate an internal 3606 * regions of a sparse file. Since smb2 does not have a 3607 * fallocate command we have two options on how to emulate this. 3608 * We can either turn the entire file to become non-sparse 3609 * which we only do if the fallocate is for virtually 3610 * the whole file, or we can overwrite the region with zeroes 3611 * using SMB2_write, which could be prohibitevly expensive 3612 * if len is large. 3613 */ 3614 /* 3615 * We are only trying to fallocate a small region so 3616 * just write it with zero. 3617 */ 3618 if (len <= 1024 * 1024) { 3619 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3620 off, len); 3621 goto out; 3622 } 3623 3624 /* 3625 * Check if falloc starts within first few pages of file 3626 * and ends within a few pages of the end of file to 3627 * ensure that most of file is being forced to be 3628 * fallocated now. If so then setting whole file sparse 3629 * ie potentially making a few extra pages at the beginning 3630 * or end of the file non-sparse via set_sparse is harmless. 3631 */ 3632 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3633 rc = -EOPNOTSUPP; 3634 goto out; 3635 } 3636 } 3637 3638 smb2_set_sparse(xid, tcon, cfile, inode, false); 3639 rc = 0; 3640 3641 out: 3642 if (rc) 3643 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3644 tcon->ses->Suid, off, len, rc); 3645 else 3646 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3647 tcon->ses->Suid, off, len); 3648 3649 free_xid(xid); 3650 return rc; 3651 } 3652 3653 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3654 loff_t off, loff_t len) 3655 { 3656 int rc; 3657 unsigned int xid; 3658 struct inode *inode = file_inode(file); 3659 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3660 struct cifsFileInfo *cfile = file->private_data; 3661 struct netfs_inode *ictx = &cifsi->netfs; 3662 loff_t old_eof, new_eof; 3663 3664 xid = get_xid(); 3665 3666 inode_lock(inode); 3667 3668 old_eof = i_size_read(inode); 3669 if ((off >= old_eof) || 3670 off + len >= old_eof) { 3671 rc = -EINVAL; 3672 goto out; 3673 } 3674 3675 filemap_invalidate_lock(inode->i_mapping); 3676 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3677 if (rc < 0) 3678 goto out_2; 3679 3680 truncate_pagecache_range(inode, off, old_eof); 3681 ictx->zero_point = old_eof; 3682 3683 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3684 old_eof - off - len, off); 3685 if (rc < 0) 3686 goto out_2; 3687 3688 new_eof = old_eof - len; 3689 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3690 cfile->fid.volatile_fid, cfile->pid, new_eof); 3691 if (rc < 0) 3692 goto out_2; 3693 3694 rc = 0; 3695 3696 truncate_setsize(inode, new_eof); 3697 netfs_resize_file(&cifsi->netfs, new_eof, true); 3698 ictx->zero_point = new_eof; 3699 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3700 out_2: 3701 filemap_invalidate_unlock(inode->i_mapping); 3702 out: 3703 inode_unlock(inode); 3704 free_xid(xid); 3705 return rc; 3706 } 3707 3708 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3709 loff_t off, loff_t len) 3710 { 3711 int rc; 3712 unsigned int xid; 3713 struct cifsFileInfo *cfile = file->private_data; 3714 struct inode *inode = file_inode(file); 3715 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3716 __u64 count, old_eof, new_eof; 3717 3718 xid = get_xid(); 3719 3720 inode_lock(inode); 3721 3722 old_eof = i_size_read(inode); 3723 if (off >= old_eof) { 3724 rc = -EINVAL; 3725 goto out; 3726 } 3727 3728 count = old_eof - off; 3729 new_eof = old_eof + len; 3730 3731 filemap_invalidate_lock(inode->i_mapping); 3732 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3733 if (rc < 0) 3734 goto out_2; 3735 truncate_pagecache_range(inode, off, old_eof); 3736 3737 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3738 cfile->fid.volatile_fid, cfile->pid, new_eof); 3739 if (rc < 0) 3740 goto out_2; 3741 3742 truncate_setsize(inode, new_eof); 3743 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3744 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3745 3746 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3747 if (rc < 0) 3748 goto out_2; 3749 cifsi->netfs.zero_point = new_eof; 3750 3751 rc = smb3_zero_data(file, tcon, off, len, xid); 3752 if (rc < 0) 3753 goto out_2; 3754 3755 rc = 0; 3756 out_2: 3757 filemap_invalidate_unlock(inode->i_mapping); 3758 out: 3759 inode_unlock(inode); 3760 free_xid(xid); 3761 return rc; 3762 } 3763 3764 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3765 { 3766 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3767 struct cifsInodeInfo *cifsi; 3768 struct inode *inode; 3769 int rc = 0; 3770 struct file_allocated_range_buffer in_data, *out_data = NULL; 3771 u32 out_data_len; 3772 unsigned int xid; 3773 3774 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3775 return generic_file_llseek(file, offset, whence); 3776 3777 inode = d_inode(cfile->dentry); 3778 cifsi = CIFS_I(inode); 3779 3780 if (offset < 0 || offset >= i_size_read(inode)) 3781 return -ENXIO; 3782 3783 xid = get_xid(); 3784 /* 3785 * We need to be sure that all dirty pages are written as they 3786 * might fill holes on the server. 3787 * Note that we also MUST flush any written pages since at least 3788 * some servers (Windows2016) will not reflect recent writes in 3789 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3790 */ 3791 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3792 if (wrcfile) { 3793 filemap_write_and_wait(inode->i_mapping); 3794 smb2_flush_file(xid, tcon, &wrcfile->fid); 3795 cifsFileInfo_put(wrcfile); 3796 } 3797 3798 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3799 if (whence == SEEK_HOLE) 3800 offset = i_size_read(inode); 3801 goto lseek_exit; 3802 } 3803 3804 in_data.file_offset = cpu_to_le64(offset); 3805 in_data.length = cpu_to_le64(i_size_read(inode)); 3806 3807 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3808 cfile->fid.volatile_fid, 3809 FSCTL_QUERY_ALLOCATED_RANGES, 3810 (char *)&in_data, sizeof(in_data), 3811 sizeof(struct file_allocated_range_buffer), 3812 (char **)&out_data, &out_data_len); 3813 if (rc == -E2BIG) 3814 rc = 0; 3815 if (rc) 3816 goto lseek_exit; 3817 3818 if (whence == SEEK_HOLE && out_data_len == 0) 3819 goto lseek_exit; 3820 3821 if (whence == SEEK_DATA && out_data_len == 0) { 3822 rc = -ENXIO; 3823 goto lseek_exit; 3824 } 3825 3826 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3827 rc = -EINVAL; 3828 goto lseek_exit; 3829 } 3830 if (whence == SEEK_DATA) { 3831 offset = le64_to_cpu(out_data->file_offset); 3832 goto lseek_exit; 3833 } 3834 if (offset < le64_to_cpu(out_data->file_offset)) 3835 goto lseek_exit; 3836 3837 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3838 3839 lseek_exit: 3840 free_xid(xid); 3841 kfree(out_data); 3842 if (!rc) 3843 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3844 else 3845 return rc; 3846 } 3847 3848 static int smb3_fiemap(struct cifs_tcon *tcon, 3849 struct cifsFileInfo *cfile, 3850 struct fiemap_extent_info *fei, u64 start, u64 len) 3851 { 3852 unsigned int xid; 3853 struct file_allocated_range_buffer in_data, *out_data; 3854 u32 out_data_len; 3855 int i, num, rc, flags, last_blob; 3856 u64 next; 3857 3858 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3859 if (rc) 3860 return rc; 3861 3862 xid = get_xid(); 3863 again: 3864 in_data.file_offset = cpu_to_le64(start); 3865 in_data.length = cpu_to_le64(len); 3866 3867 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3868 cfile->fid.volatile_fid, 3869 FSCTL_QUERY_ALLOCATED_RANGES, 3870 (char *)&in_data, sizeof(in_data), 3871 1024 * sizeof(struct file_allocated_range_buffer), 3872 (char **)&out_data, &out_data_len); 3873 if (rc == -E2BIG) { 3874 last_blob = 0; 3875 rc = 0; 3876 } else 3877 last_blob = 1; 3878 if (rc) 3879 goto out; 3880 3881 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3882 rc = -EINVAL; 3883 goto out; 3884 } 3885 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3886 rc = -EINVAL; 3887 goto out; 3888 } 3889 3890 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3891 for (i = 0; i < num; i++) { 3892 flags = 0; 3893 if (i == num - 1 && last_blob) 3894 flags |= FIEMAP_EXTENT_LAST; 3895 3896 rc = fiemap_fill_next_extent(fei, 3897 le64_to_cpu(out_data[i].file_offset), 3898 le64_to_cpu(out_data[i].file_offset), 3899 le64_to_cpu(out_data[i].length), 3900 flags); 3901 if (rc < 0) 3902 goto out; 3903 if (rc == 1) { 3904 rc = 0; 3905 goto out; 3906 } 3907 } 3908 3909 if (!last_blob) { 3910 next = le64_to_cpu(out_data[num - 1].file_offset) + 3911 le64_to_cpu(out_data[num - 1].length); 3912 len = len - (next - start); 3913 start = next; 3914 goto again; 3915 } 3916 3917 out: 3918 free_xid(xid); 3919 kfree(out_data); 3920 return rc; 3921 } 3922 3923 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3924 loff_t off, loff_t len) 3925 { 3926 /* KEEP_SIZE already checked for by do_fallocate */ 3927 if (mode & FALLOC_FL_PUNCH_HOLE) 3928 return smb3_punch_hole(file, tcon, off, len); 3929 else if (mode & FALLOC_FL_ZERO_RANGE) { 3930 if (mode & FALLOC_FL_KEEP_SIZE) 3931 return smb3_zero_range(file, tcon, off, len, true); 3932 return smb3_zero_range(file, tcon, off, len, false); 3933 } else if (mode == FALLOC_FL_KEEP_SIZE) 3934 return smb3_simple_falloc(file, tcon, off, len, true); 3935 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3936 return smb3_collapse_range(file, tcon, off, len); 3937 else if (mode == FALLOC_FL_INSERT_RANGE) 3938 return smb3_insert_range(file, tcon, off, len); 3939 else if (mode == 0) 3940 return smb3_simple_falloc(file, tcon, off, len, false); 3941 3942 return -EOPNOTSUPP; 3943 } 3944 3945 static void 3946 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3947 struct cifsInodeInfo *cinode, __u32 oplock, 3948 __u16 epoch, bool *purge_cache) 3949 { 3950 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3951 } 3952 3953 static void 3954 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3955 __u16 epoch, bool *purge_cache); 3956 3957 static void 3958 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3959 struct cifsInodeInfo *cinode, __u32 oplock, 3960 __u16 epoch, bool *purge_cache) 3961 { 3962 unsigned int old_state = cinode->oplock; 3963 __u16 old_epoch = cinode->epoch; 3964 unsigned int new_state; 3965 3966 if (epoch > old_epoch) { 3967 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3968 cinode->epoch = epoch; 3969 } 3970 3971 new_state = cinode->oplock; 3972 *purge_cache = false; 3973 3974 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3975 (new_state & CIFS_CACHE_READ_FLG) == 0) 3976 *purge_cache = true; 3977 else if (old_state == new_state && (epoch - old_epoch > 1)) 3978 *purge_cache = true; 3979 } 3980 3981 static void 3982 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3983 __u16 epoch, bool *purge_cache) 3984 { 3985 oplock &= 0xFF; 3986 cinode->lease_granted = false; 3987 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3988 return; 3989 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3990 cinode->oplock = CIFS_CACHE_RHW_FLG; 3991 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3992 &cinode->netfs.inode); 3993 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3994 cinode->oplock = CIFS_CACHE_RW_FLG; 3995 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3996 &cinode->netfs.inode); 3997 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3998 cinode->oplock = CIFS_CACHE_READ_FLG; 3999 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 4000 &cinode->netfs.inode); 4001 } else 4002 cinode->oplock = 0; 4003 } 4004 4005 static void 4006 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4007 __u16 epoch, bool *purge_cache) 4008 { 4009 char message[5] = {0}; 4010 unsigned int new_oplock = 0; 4011 4012 oplock &= 0xFF; 4013 cinode->lease_granted = true; 4014 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4015 return; 4016 4017 /* Check if the server granted an oplock rather than a lease */ 4018 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4019 return smb2_set_oplock_level(cinode, oplock, epoch, 4020 purge_cache); 4021 4022 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4023 new_oplock |= CIFS_CACHE_READ_FLG; 4024 strcat(message, "R"); 4025 } 4026 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4027 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4028 strcat(message, "H"); 4029 } 4030 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4031 new_oplock |= CIFS_CACHE_WRITE_FLG; 4032 strcat(message, "W"); 4033 } 4034 if (!new_oplock) 4035 strscpy(message, "None"); 4036 4037 cinode->oplock = new_oplock; 4038 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4039 &cinode->netfs.inode); 4040 } 4041 4042 static void 4043 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4044 __u16 epoch, bool *purge_cache) 4045 { 4046 unsigned int old_oplock = cinode->oplock; 4047 4048 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4049 4050 if (purge_cache) { 4051 *purge_cache = false; 4052 if (old_oplock == CIFS_CACHE_READ_FLG) { 4053 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4054 (epoch - cinode->epoch > 0)) 4055 *purge_cache = true; 4056 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4057 (epoch - cinode->epoch > 1)) 4058 *purge_cache = true; 4059 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4060 (epoch - cinode->epoch > 1)) 4061 *purge_cache = true; 4062 else if (cinode->oplock == 0 && 4063 (epoch - cinode->epoch > 0)) 4064 *purge_cache = true; 4065 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4066 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4067 (epoch - cinode->epoch > 0)) 4068 *purge_cache = true; 4069 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4070 (epoch - cinode->epoch > 1)) 4071 *purge_cache = true; 4072 } 4073 cinode->epoch = epoch; 4074 } 4075 } 4076 4077 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4078 static bool 4079 smb2_is_read_op(__u32 oplock) 4080 { 4081 return oplock == SMB2_OPLOCK_LEVEL_II; 4082 } 4083 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4084 4085 static bool 4086 smb21_is_read_op(__u32 oplock) 4087 { 4088 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4089 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4090 } 4091 4092 static __le32 4093 map_oplock_to_lease(u8 oplock) 4094 { 4095 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4096 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4097 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4098 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4099 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4100 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4101 SMB2_LEASE_WRITE_CACHING_LE; 4102 return 0; 4103 } 4104 4105 static char * 4106 smb2_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4107 { 4108 struct create_lease *buf; 4109 4110 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4111 if (!buf) 4112 return NULL; 4113 4114 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4115 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4116 4117 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4118 (struct create_lease, lcontext)); 4119 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4120 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4121 (struct create_lease, Name)); 4122 buf->ccontext.NameLength = cpu_to_le16(4); 4123 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4124 buf->Name[0] = 'R'; 4125 buf->Name[1] = 'q'; 4126 buf->Name[2] = 'L'; 4127 buf->Name[3] = 's'; 4128 return (char *)buf; 4129 } 4130 4131 static char * 4132 smb3_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4133 { 4134 struct create_lease_v2 *buf; 4135 4136 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4137 if (!buf) 4138 return NULL; 4139 4140 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4141 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4142 buf->lcontext.LeaseFlags = flags; 4143 if (flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 4144 memcpy(&buf->lcontext.ParentLeaseKey, parent_lease_key, SMB2_LEASE_KEY_SIZE); 4145 4146 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4147 (struct create_lease_v2, lcontext)); 4148 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4149 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4150 (struct create_lease_v2, Name)); 4151 buf->ccontext.NameLength = cpu_to_le16(4); 4152 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4153 buf->Name[0] = 'R'; 4154 buf->Name[1] = 'q'; 4155 buf->Name[2] = 'L'; 4156 buf->Name[3] = 's'; 4157 return (char *)buf; 4158 } 4159 4160 static __u8 4161 smb2_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4162 { 4163 struct create_lease *lc = (struct create_lease *)buf; 4164 4165 *epoch = 0; /* not used */ 4166 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4167 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4168 return le32_to_cpu(lc->lcontext.LeaseState); 4169 } 4170 4171 static __u8 4172 smb3_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4173 { 4174 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4175 4176 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4177 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4178 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4179 if (lease_key) 4180 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4181 return le32_to_cpu(lc->lcontext.LeaseState); 4182 } 4183 4184 static unsigned int 4185 smb2_wp_retry_size(struct inode *inode) 4186 { 4187 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4188 SMB2_MAX_BUFFER_SIZE); 4189 } 4190 4191 static bool 4192 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4193 { 4194 return !cfile->invalidHandle; 4195 } 4196 4197 static void 4198 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4199 struct smb_rqst *old_rq, __le16 cipher_type) 4200 { 4201 struct smb2_hdr *shdr = 4202 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4203 4204 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4205 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4206 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4207 tr_hdr->Flags = cpu_to_le16(0x01); 4208 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4209 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4210 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4211 else 4212 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4213 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4214 } 4215 4216 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4217 int num_rqst, const u8 *sig, u8 **iv, 4218 struct aead_request **req, struct sg_table *sgt, 4219 unsigned int *num_sgs) 4220 { 4221 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4222 unsigned int iv_size = crypto_aead_ivsize(tfm); 4223 unsigned int len; 4224 u8 *p; 4225 4226 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4227 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4228 return ERR_PTR(*num_sgs); 4229 4230 len = iv_size; 4231 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4232 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4233 len += req_size; 4234 len = ALIGN(len, __alignof__(struct scatterlist)); 4235 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4236 4237 p = kzalloc(len, GFP_NOFS); 4238 if (!p) 4239 return ERR_PTR(-ENOMEM); 4240 4241 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4242 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4243 crypto_tfm_ctx_alignment()); 4244 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4245 __alignof__(struct scatterlist)); 4246 return p; 4247 } 4248 4249 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4250 int num_rqst, const u8 *sig, u8 **iv, 4251 struct aead_request **req, struct scatterlist **sgl) 4252 { 4253 struct sg_table sgtable = {}; 4254 unsigned int skip, num_sgs, i, j; 4255 ssize_t rc; 4256 void *p; 4257 4258 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, &num_sgs); 4259 if (IS_ERR(p)) 4260 return ERR_CAST(p); 4261 4262 sg_init_marker(sgtable.sgl, num_sgs); 4263 4264 /* 4265 * The first rqst has a transform header where the 4266 * first 20 bytes are not part of the encrypted blob. 4267 */ 4268 skip = 20; 4269 4270 for (i = 0; i < num_rqst; i++) { 4271 struct iov_iter *iter = &rqst[i].rq_iter; 4272 size_t count = iov_iter_count(iter); 4273 4274 for (j = 0; j < rqst[i].rq_nvec; j++) { 4275 cifs_sg_set_buf(&sgtable, 4276 rqst[i].rq_iov[j].iov_base + skip, 4277 rqst[i].rq_iov[j].iov_len - skip); 4278 4279 /* See the above comment on the 'skip' assignment */ 4280 skip = 0; 4281 } 4282 sgtable.orig_nents = sgtable.nents; 4283 4284 rc = extract_iter_to_sg(iter, count, &sgtable, 4285 num_sgs - sgtable.nents, 0); 4286 iov_iter_revert(iter, rc); 4287 sgtable.orig_nents = sgtable.nents; 4288 } 4289 4290 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4291 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4292 *sgl = sgtable.sgl; 4293 return p; 4294 } 4295 4296 static int 4297 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4298 { 4299 struct TCP_Server_Info *pserver; 4300 struct cifs_ses *ses; 4301 u8 *ses_enc_key; 4302 4303 /* If server is a channel, select the primary channel */ 4304 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4305 4306 spin_lock(&cifs_tcp_ses_lock); 4307 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4308 if (ses->Suid == ses_id) { 4309 spin_lock(&ses->ses_lock); 4310 ses_enc_key = enc ? ses->smb3encryptionkey : 4311 ses->smb3decryptionkey; 4312 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4313 spin_unlock(&ses->ses_lock); 4314 spin_unlock(&cifs_tcp_ses_lock); 4315 return 0; 4316 } 4317 } 4318 spin_unlock(&cifs_tcp_ses_lock); 4319 4320 trace_smb3_ses_not_found(ses_id); 4321 4322 return -EAGAIN; 4323 } 4324 /* 4325 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4326 * iov[0] - transform header (associate data), 4327 * iov[1-N] - SMB2 header and pages - data to encrypt. 4328 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4329 * untouched. 4330 */ 4331 static int 4332 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4333 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4334 { 4335 struct smb2_transform_hdr *tr_hdr = 4336 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4337 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4338 int rc = 0; 4339 struct scatterlist *sg; 4340 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4341 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4342 struct aead_request *req; 4343 u8 *iv; 4344 DECLARE_CRYPTO_WAIT(wait); 4345 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4346 void *creq; 4347 4348 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4349 if (rc) { 4350 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4351 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4352 return rc; 4353 } 4354 4355 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4356 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4357 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4358 else 4359 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4360 4361 if (rc) { 4362 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4363 return rc; 4364 } 4365 4366 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4367 if (rc) { 4368 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4369 return rc; 4370 } 4371 4372 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg); 4373 if (IS_ERR(creq)) 4374 return PTR_ERR(creq); 4375 4376 if (!enc) { 4377 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4378 crypt_len += SMB2_SIGNATURE_SIZE; 4379 } 4380 4381 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4382 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4383 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4384 else { 4385 iv[0] = 3; 4386 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4387 } 4388 4389 aead_request_set_tfm(req, tfm); 4390 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4391 aead_request_set_ad(req, assoc_data_len); 4392 4393 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4394 crypto_req_done, &wait); 4395 4396 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4397 : crypto_aead_decrypt(req), &wait); 4398 4399 if (!rc && enc) 4400 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4401 4402 kfree_sensitive(creq); 4403 return rc; 4404 } 4405 4406 /* 4407 * Clear a read buffer, discarding the folios which have the 1st mark set. 4408 */ 4409 static void cifs_clear_folioq_buffer(struct folio_queue *buffer) 4410 { 4411 struct folio_queue *folioq; 4412 4413 while ((folioq = buffer)) { 4414 for (int s = 0; s < folioq_count(folioq); s++) 4415 if (folioq_is_marked(folioq, s)) 4416 folio_put(folioq_folio(folioq, s)); 4417 buffer = folioq->next; 4418 kfree(folioq); 4419 } 4420 } 4421 4422 /* 4423 * Allocate buffer space into a folio queue. 4424 */ 4425 static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size) 4426 { 4427 struct folio_queue *buffer = NULL, *tail = NULL, *p; 4428 struct folio *folio; 4429 unsigned int slot; 4430 4431 do { 4432 if (!tail || folioq_full(tail)) { 4433 p = kmalloc(sizeof(*p), GFP_NOFS); 4434 if (!p) 4435 goto nomem; 4436 folioq_init(p, 0); 4437 if (tail) { 4438 tail->next = p; 4439 p->prev = tail; 4440 } else { 4441 buffer = p; 4442 } 4443 tail = p; 4444 } 4445 4446 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0); 4447 if (!folio) 4448 goto nomem; 4449 4450 slot = folioq_append_mark(tail, folio); 4451 size -= folioq_folio_size(tail, slot); 4452 } while (size > 0); 4453 4454 return buffer; 4455 4456 nomem: 4457 cifs_clear_folioq_buffer(buffer); 4458 return NULL; 4459 } 4460 4461 /* 4462 * Copy data from an iterator to the folios in a folio queue buffer. 4463 */ 4464 static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size, 4465 struct folio_queue *buffer) 4466 { 4467 for (; buffer; buffer = buffer->next) { 4468 for (int s = 0; s < folioq_count(buffer); s++) { 4469 struct folio *folio = folioq_folio(buffer, s); 4470 size_t part = folioq_folio_size(buffer, s); 4471 4472 part = umin(part, size); 4473 4474 if (copy_folio_from_iter(folio, 0, part, iter) != part) 4475 return false; 4476 size -= part; 4477 } 4478 } 4479 return true; 4480 } 4481 4482 void 4483 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4484 { 4485 for (int i = 0; i < num_rqst; i++) 4486 cifs_clear_folioq_buffer(rqst[i].rq_buffer); 4487 } 4488 4489 /* 4490 * This function will initialize new_rq and encrypt the content. 4491 * The first entry, new_rq[0], only contains a single iov which contains 4492 * a smb2_transform_hdr and is pre-allocated by the caller. 4493 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4494 * 4495 * The end result is an array of smb_rqst structures where the first structure 4496 * only contains a single iov for the transform header which we then can pass 4497 * to crypt_message(). 4498 * 4499 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4500 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4501 */ 4502 static int 4503 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4504 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4505 { 4506 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4507 unsigned int orig_len = 0; 4508 int rc = -ENOMEM; 4509 4510 for (int i = 1; i < num_rqst; i++) { 4511 struct smb_rqst *old = &old_rq[i - 1]; 4512 struct smb_rqst *new = &new_rq[i]; 4513 struct folio_queue *buffer = NULL; 4514 size_t size = iov_iter_count(&old->rq_iter); 4515 4516 orig_len += smb_rqst_len(server, old); 4517 new->rq_iov = old->rq_iov; 4518 new->rq_nvec = old->rq_nvec; 4519 4520 if (size > 0) { 4521 buffer = cifs_alloc_folioq_buffer(size); 4522 if (!buffer) 4523 goto err_free; 4524 4525 new->rq_buffer = buffer; 4526 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE, 4527 buffer, 0, 0, size); 4528 4529 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) { 4530 rc = -EIO; 4531 goto err_free; 4532 } 4533 } 4534 } 4535 4536 /* fill the 1st iov with a transform header */ 4537 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4538 4539 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4540 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4541 if (rc) 4542 goto err_free; 4543 4544 return rc; 4545 4546 err_free: 4547 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4548 return rc; 4549 } 4550 4551 static int 4552 smb3_is_transform_hdr(void *buf) 4553 { 4554 struct smb2_transform_hdr *trhdr = buf; 4555 4556 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4557 } 4558 4559 static int 4560 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4561 unsigned int buf_data_size, struct iov_iter *iter, 4562 bool is_offloaded) 4563 { 4564 struct crypto_aead *tfm; 4565 struct smb_rqst rqst = {NULL}; 4566 struct kvec iov[2]; 4567 size_t iter_size = 0; 4568 int rc; 4569 4570 iov[0].iov_base = buf; 4571 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4572 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4573 iov[1].iov_len = buf_data_size; 4574 4575 rqst.rq_iov = iov; 4576 rqst.rq_nvec = 2; 4577 if (iter) { 4578 rqst.rq_iter = *iter; 4579 iter_size = iov_iter_count(iter); 4580 } 4581 4582 if (is_offloaded) { 4583 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4584 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4585 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4586 else 4587 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4588 if (IS_ERR(tfm)) { 4589 rc = PTR_ERR(tfm); 4590 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4591 4592 return rc; 4593 } 4594 } else { 4595 rc = smb3_crypto_aead_allocate(server); 4596 if (unlikely(rc)) 4597 return rc; 4598 tfm = server->secmech.dec; 4599 } 4600 4601 rc = crypt_message(server, 1, &rqst, 0, tfm); 4602 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4603 4604 if (is_offloaded) 4605 crypto_free_aead(tfm); 4606 4607 if (rc) 4608 return rc; 4609 4610 memmove(buf, iov[1].iov_base, buf_data_size); 4611 4612 if (!is_offloaded) 4613 server->total_read = buf_data_size + iter_size; 4614 4615 return rc; 4616 } 4617 4618 static int 4619 cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size, 4620 size_t skip, struct iov_iter *iter) 4621 { 4622 for (; folioq; folioq = folioq->next) { 4623 for (int s = 0; s < folioq_count(folioq); s++) { 4624 struct folio *folio = folioq_folio(folioq, s); 4625 size_t fsize = folio_size(folio); 4626 size_t n, len = umin(fsize - skip, data_size); 4627 4628 n = copy_folio_to_iter(folio, skip, len, iter); 4629 if (n != len) { 4630 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4631 return -EIO; 4632 } 4633 data_size -= n; 4634 skip = 0; 4635 } 4636 } 4637 4638 return 0; 4639 } 4640 4641 static int 4642 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4643 char *buf, unsigned int buf_len, struct folio_queue *buffer, 4644 unsigned int buffer_len, bool is_offloaded) 4645 { 4646 unsigned int data_offset; 4647 unsigned int data_len; 4648 unsigned int cur_off; 4649 unsigned int cur_page_idx; 4650 unsigned int pad_len; 4651 struct cifs_io_subrequest *rdata = mid->callback_data; 4652 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4653 int length; 4654 bool use_rdma_mr = false; 4655 4656 if (shdr->Command != SMB2_READ) { 4657 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4658 return -EOPNOTSUPP; 4659 } 4660 4661 if (server->ops->is_session_expired && 4662 server->ops->is_session_expired(buf)) { 4663 if (!is_offloaded) 4664 cifs_reconnect(server, true); 4665 return -1; 4666 } 4667 4668 if (server->ops->is_status_pending && 4669 server->ops->is_status_pending(buf, server)) 4670 return -1; 4671 4672 /* set up first two iov to get credits */ 4673 rdata->iov[0].iov_base = buf; 4674 rdata->iov[0].iov_len = 0; 4675 rdata->iov[1].iov_base = buf; 4676 rdata->iov[1].iov_len = 4677 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4678 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4679 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4680 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4681 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4682 4683 rdata->result = server->ops->map_error(buf, true); 4684 if (rdata->result != 0) { 4685 cifs_dbg(FYI, "%s: server returned error %d\n", 4686 __func__, rdata->result); 4687 /* normal error on read response */ 4688 if (is_offloaded) 4689 mid->mid_state = MID_RESPONSE_RECEIVED; 4690 else 4691 dequeue_mid(mid, false); 4692 return 0; 4693 } 4694 4695 data_offset = server->ops->read_data_offset(buf); 4696 #ifdef CONFIG_CIFS_SMB_DIRECT 4697 use_rdma_mr = rdata->mr; 4698 #endif 4699 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4700 4701 if (data_offset < server->vals->read_rsp_size) { 4702 /* 4703 * win2k8 sometimes sends an offset of 0 when the read 4704 * is beyond the EOF. Treat it as if the data starts just after 4705 * the header. 4706 */ 4707 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4708 __func__, data_offset); 4709 data_offset = server->vals->read_rsp_size; 4710 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4711 /* data_offset is beyond the end of smallbuf */ 4712 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4713 __func__, data_offset); 4714 rdata->result = -EIO; 4715 if (is_offloaded) 4716 mid->mid_state = MID_RESPONSE_MALFORMED; 4717 else 4718 dequeue_mid(mid, rdata->result); 4719 return 0; 4720 } 4721 4722 pad_len = data_offset - server->vals->read_rsp_size; 4723 4724 if (buf_len <= data_offset) { 4725 /* read response payload is in pages */ 4726 cur_page_idx = pad_len / PAGE_SIZE; 4727 cur_off = pad_len % PAGE_SIZE; 4728 4729 if (cur_page_idx != 0) { 4730 /* data offset is beyond the 1st page of response */ 4731 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4732 __func__, data_offset); 4733 rdata->result = -EIO; 4734 if (is_offloaded) 4735 mid->mid_state = MID_RESPONSE_MALFORMED; 4736 else 4737 dequeue_mid(mid, rdata->result); 4738 return 0; 4739 } 4740 4741 if (data_len > buffer_len - pad_len) { 4742 /* data_len is corrupt -- discard frame */ 4743 rdata->result = -EIO; 4744 if (is_offloaded) 4745 mid->mid_state = MID_RESPONSE_MALFORMED; 4746 else 4747 dequeue_mid(mid, rdata->result); 4748 return 0; 4749 } 4750 4751 /* Copy the data to the output I/O iterator. */ 4752 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len, 4753 cur_off, &rdata->subreq.io_iter); 4754 if (rdata->result != 0) { 4755 if (is_offloaded) 4756 mid->mid_state = MID_RESPONSE_MALFORMED; 4757 else 4758 dequeue_mid(mid, rdata->result); 4759 return 0; 4760 } 4761 rdata->got_bytes = buffer_len; 4762 4763 } else if (buf_len >= data_offset + data_len) { 4764 /* read response payload is in buf */ 4765 WARN_ONCE(buffer, "read data can be either in buf or in buffer"); 4766 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4767 if (length < 0) 4768 return length; 4769 rdata->got_bytes = data_len; 4770 } else { 4771 /* read response payload cannot be in both buf and pages */ 4772 WARN_ONCE(1, "buf can not contain only a part of read data"); 4773 rdata->result = -EIO; 4774 if (is_offloaded) 4775 mid->mid_state = MID_RESPONSE_MALFORMED; 4776 else 4777 dequeue_mid(mid, rdata->result); 4778 return 0; 4779 } 4780 4781 if (is_offloaded) 4782 mid->mid_state = MID_RESPONSE_RECEIVED; 4783 else 4784 dequeue_mid(mid, false); 4785 return 0; 4786 } 4787 4788 struct smb2_decrypt_work { 4789 struct work_struct decrypt; 4790 struct TCP_Server_Info *server; 4791 struct folio_queue *buffer; 4792 char *buf; 4793 unsigned int len; 4794 }; 4795 4796 4797 static void smb2_decrypt_offload(struct work_struct *work) 4798 { 4799 struct smb2_decrypt_work *dw = container_of(work, 4800 struct smb2_decrypt_work, decrypt); 4801 int rc; 4802 struct mid_q_entry *mid; 4803 struct iov_iter iter; 4804 4805 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len); 4806 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4807 &iter, true); 4808 if (rc) { 4809 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4810 goto free_pages; 4811 } 4812 4813 dw->server->lstrp = jiffies; 4814 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4815 if (mid == NULL) 4816 cifs_dbg(FYI, "mid not found\n"); 4817 else { 4818 mid->decrypted = true; 4819 rc = handle_read_data(dw->server, mid, dw->buf, 4820 dw->server->vals->read_rsp_size, 4821 dw->buffer, dw->len, 4822 true); 4823 if (rc >= 0) { 4824 #ifdef CONFIG_CIFS_STATS2 4825 mid->when_received = jiffies; 4826 #endif 4827 if (dw->server->ops->is_network_name_deleted) 4828 dw->server->ops->is_network_name_deleted(dw->buf, 4829 dw->server); 4830 4831 mid_execute_callback(mid); 4832 } else { 4833 spin_lock(&dw->server->srv_lock); 4834 if (dw->server->tcpStatus == CifsNeedReconnect) { 4835 spin_lock(&dw->server->mid_queue_lock); 4836 mid->mid_state = MID_RETRY_NEEDED; 4837 spin_unlock(&dw->server->mid_queue_lock); 4838 spin_unlock(&dw->server->srv_lock); 4839 mid_execute_callback(mid); 4840 } else { 4841 spin_lock(&dw->server->mid_queue_lock); 4842 mid->mid_state = MID_REQUEST_SUBMITTED; 4843 mid->deleted_from_q = false; 4844 list_add_tail(&mid->qhead, 4845 &dw->server->pending_mid_q); 4846 spin_unlock(&dw->server->mid_queue_lock); 4847 spin_unlock(&dw->server->srv_lock); 4848 } 4849 } 4850 release_mid(mid); 4851 } 4852 4853 free_pages: 4854 cifs_clear_folioq_buffer(dw->buffer); 4855 cifs_small_buf_release(dw->buf); 4856 kfree(dw); 4857 } 4858 4859 4860 static int 4861 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4862 int *num_mids) 4863 { 4864 char *buf = server->smallbuf; 4865 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4866 struct iov_iter iter; 4867 unsigned int len; 4868 unsigned int buflen = server->pdu_size; 4869 int rc; 4870 struct smb2_decrypt_work *dw; 4871 4872 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4873 if (!dw) 4874 return -ENOMEM; 4875 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4876 dw->server = server; 4877 4878 *num_mids = 1; 4879 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4880 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4881 4882 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4883 if (rc < 0) 4884 goto free_dw; 4885 server->total_read += rc; 4886 4887 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4888 server->vals->read_rsp_size; 4889 dw->len = len; 4890 len = round_up(dw->len, PAGE_SIZE); 4891 4892 rc = -ENOMEM; 4893 dw->buffer = cifs_alloc_folioq_buffer(len); 4894 if (!dw->buffer) 4895 goto discard_data; 4896 4897 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len); 4898 4899 /* Read the data into the buffer and clear excess bufferage. */ 4900 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4901 if (rc < 0) 4902 goto discard_data; 4903 4904 server->total_read += rc; 4905 if (rc < len) { 4906 struct iov_iter tmp = iter; 4907 4908 iov_iter_advance(&tmp, rc); 4909 iov_iter_zero(len - rc, &tmp); 4910 } 4911 iov_iter_truncate(&iter, dw->len); 4912 4913 rc = cifs_discard_remaining_data(server); 4914 if (rc) 4915 goto free_pages; 4916 4917 /* 4918 * For large reads, offload to different thread for better performance, 4919 * use more cores decrypting which can be expensive 4920 */ 4921 4922 if ((server->min_offload) && (server->in_flight > 1) && 4923 (server->pdu_size >= server->min_offload)) { 4924 dw->buf = server->smallbuf; 4925 server->smallbuf = (char *)cifs_small_buf_get(); 4926 4927 queue_work(decrypt_wq, &dw->decrypt); 4928 *num_mids = 0; /* worker thread takes care of finding mid */ 4929 return -1; 4930 } 4931 4932 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4933 &iter, false); 4934 if (rc) 4935 goto free_pages; 4936 4937 *mid = smb2_find_mid(server, buf); 4938 if (*mid == NULL) { 4939 cifs_dbg(FYI, "mid not found\n"); 4940 } else { 4941 cifs_dbg(FYI, "mid found\n"); 4942 (*mid)->decrypted = true; 4943 rc = handle_read_data(server, *mid, buf, 4944 server->vals->read_rsp_size, 4945 dw->buffer, dw->len, false); 4946 if (rc >= 0) { 4947 if (server->ops->is_network_name_deleted) { 4948 server->ops->is_network_name_deleted(buf, 4949 server); 4950 } 4951 } 4952 } 4953 4954 free_pages: 4955 cifs_clear_folioq_buffer(dw->buffer); 4956 free_dw: 4957 kfree(dw); 4958 return rc; 4959 discard_data: 4960 cifs_discard_remaining_data(server); 4961 goto free_pages; 4962 } 4963 4964 static int 4965 receive_encrypted_standard(struct TCP_Server_Info *server, 4966 struct mid_q_entry **mids, char **bufs, 4967 int *num_mids) 4968 { 4969 int ret, length; 4970 char *buf = server->smallbuf; 4971 struct smb2_hdr *shdr; 4972 unsigned int pdu_length = server->pdu_size; 4973 unsigned int buf_size; 4974 unsigned int next_cmd; 4975 struct mid_q_entry *mid_entry; 4976 int next_is_large; 4977 char *next_buffer = NULL; 4978 4979 *num_mids = 0; 4980 4981 /* switch to large buffer if too big for a small one */ 4982 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4983 server->large_buf = true; 4984 memcpy(server->bigbuf, buf, server->total_read); 4985 buf = server->bigbuf; 4986 } 4987 4988 /* now read the rest */ 4989 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4990 pdu_length - HEADER_SIZE(server) + 1); 4991 if (length < 0) 4992 return length; 4993 server->total_read += length; 4994 4995 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4996 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4997 if (length) 4998 return length; 4999 5000 next_is_large = server->large_buf; 5001 one_more: 5002 shdr = (struct smb2_hdr *)buf; 5003 next_cmd = le32_to_cpu(shdr->NextCommand); 5004 if (next_cmd) { 5005 if (WARN_ON_ONCE(next_cmd > pdu_length)) 5006 return -1; 5007 if (next_is_large) 5008 next_buffer = (char *)cifs_buf_get(); 5009 else 5010 next_buffer = (char *)cifs_small_buf_get(); 5011 if (!next_buffer) { 5012 cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); 5013 return -1; 5014 } 5015 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 5016 } 5017 5018 mid_entry = smb2_find_mid(server, buf); 5019 if (mid_entry == NULL) 5020 cifs_dbg(FYI, "mid not found\n"); 5021 else { 5022 cifs_dbg(FYI, "mid found\n"); 5023 mid_entry->decrypted = true; 5024 mid_entry->resp_buf_size = server->pdu_size; 5025 } 5026 5027 if (*num_mids >= MAX_COMPOUND) { 5028 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5029 return -1; 5030 } 5031 bufs[*num_mids] = buf; 5032 mids[(*num_mids)++] = mid_entry; 5033 5034 if (mid_entry && mid_entry->handle) 5035 ret = mid_entry->handle(server, mid_entry); 5036 else 5037 ret = cifs_handle_standard(server, mid_entry); 5038 5039 if (ret == 0 && next_cmd) { 5040 pdu_length -= next_cmd; 5041 server->large_buf = next_is_large; 5042 if (next_is_large) 5043 server->bigbuf = buf = next_buffer; 5044 else 5045 server->smallbuf = buf = next_buffer; 5046 goto one_more; 5047 } else if (ret != 0) { 5048 /* 5049 * ret != 0 here means that we didn't get to handle_mid() thus 5050 * server->smallbuf and server->bigbuf are still valid. We need 5051 * to free next_buffer because it is not going to be used 5052 * anywhere. 5053 */ 5054 if (next_is_large) 5055 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5056 else 5057 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5058 } 5059 5060 return ret; 5061 } 5062 5063 static int 5064 smb3_receive_transform(struct TCP_Server_Info *server, 5065 struct mid_q_entry **mids, char **bufs, int *num_mids) 5066 { 5067 char *buf = server->smallbuf; 5068 unsigned int pdu_length = server->pdu_size; 5069 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5070 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5071 5072 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5073 sizeof(struct smb2_hdr)) { 5074 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5075 pdu_length); 5076 cifs_reconnect(server, true); 5077 return -ECONNABORTED; 5078 } 5079 5080 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5081 cifs_server_dbg(VFS, "Transform message is broken\n"); 5082 cifs_reconnect(server, true); 5083 return -ECONNABORTED; 5084 } 5085 5086 /* TODO: add support for compounds containing READ. */ 5087 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5088 return receive_encrypted_read(server, &mids[0], num_mids); 5089 } 5090 5091 return receive_encrypted_standard(server, mids, bufs, num_mids); 5092 } 5093 5094 int 5095 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5096 { 5097 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5098 5099 return handle_read_data(server, mid, buf, server->pdu_size, 5100 NULL, 0, false); 5101 } 5102 5103 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5104 unsigned int *noff) 5105 { 5106 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5107 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5108 5109 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5110 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5111 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5112 return -EINVAL; 5113 } else { 5114 *noff = le32_to_cpu(hdr->NextCommand); 5115 } 5116 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5117 return -EINVAL; 5118 return 0; 5119 } 5120 5121 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5122 struct dentry *dentry, struct cifs_tcon *tcon, 5123 const char *full_path, umode_t mode, dev_t dev, 5124 const char *symname) 5125 { 5126 struct TCP_Server_Info *server = tcon->ses->server; 5127 struct cifs_open_parms oparms; 5128 struct cifs_open_info_data idata; 5129 struct cifs_io_parms io_parms = {}; 5130 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5131 struct cifs_fid fid; 5132 unsigned int bytes_written; 5133 u8 type[8]; 5134 int type_len = 0; 5135 struct { 5136 __le64 major; 5137 __le64 minor; 5138 } __packed pdev = {}; 5139 __le16 *symname_utf16 = NULL; 5140 u8 *data = NULL; 5141 int data_len = 0; 5142 struct kvec iov[3]; 5143 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5144 int rc; 5145 5146 switch (mode & S_IFMT) { 5147 case S_IFCHR: 5148 type_len = 8; 5149 memcpy(type, "IntxCHR\0", type_len); 5150 pdev.major = cpu_to_le64(MAJOR(dev)); 5151 pdev.minor = cpu_to_le64(MINOR(dev)); 5152 data = (u8 *)&pdev; 5153 data_len = sizeof(pdev); 5154 break; 5155 case S_IFBLK: 5156 type_len = 8; 5157 memcpy(type, "IntxBLK\0", type_len); 5158 pdev.major = cpu_to_le64(MAJOR(dev)); 5159 pdev.minor = cpu_to_le64(MINOR(dev)); 5160 data = (u8 *)&pdev; 5161 data_len = sizeof(pdev); 5162 break; 5163 case S_IFLNK: 5164 type_len = 8; 5165 memcpy(type, "IntxLNK\1", type_len); 5166 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname), 5167 &data_len, cifs_sb->local_nls, 5168 NO_MAP_UNI_RSVD); 5169 if (!symname_utf16) { 5170 rc = -ENOMEM; 5171 goto out; 5172 } 5173 data_len -= 2; /* symlink is without trailing wide-nul */ 5174 data = (u8 *)symname_utf16; 5175 break; 5176 case S_IFSOCK: 5177 type_len = 8; 5178 strscpy(type, "LnxSOCK"); 5179 data = (u8 *)&pdev; 5180 data_len = sizeof(pdev); 5181 break; 5182 case S_IFIFO: 5183 type_len = 8; 5184 strscpy(type, "LnxFIFO"); 5185 data = (u8 *)&pdev; 5186 data_len = sizeof(pdev); 5187 break; 5188 default: 5189 rc = -EPERM; 5190 goto out; 5191 } 5192 5193 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5194 FILE_CREATE, CREATE_NOT_DIR | 5195 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5196 oparms.fid = &fid; 5197 idata.contains_posix_file_info = false; 5198 rc = server->ops->open(xid, &oparms, &oplock, &idata); 5199 if (rc) 5200 goto out; 5201 5202 /* 5203 * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL 5204 * option. If not then server does not support ATTR_SYSTEM and newly 5205 * created file is not SFU compatible, which means that the call failed. 5206 */ 5207 if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) { 5208 rc = -EOPNOTSUPP; 5209 goto out_close; 5210 } 5211 5212 if (type_len + data_len > 0) { 5213 io_parms.pid = current->tgid; 5214 io_parms.tcon = tcon; 5215 io_parms.length = type_len + data_len; 5216 iov[1].iov_base = type; 5217 iov[1].iov_len = type_len; 5218 iov[2].iov_base = data; 5219 iov[2].iov_len = data_len; 5220 5221 rc = server->ops->sync_write(xid, &fid, &io_parms, 5222 &bytes_written, 5223 iov, ARRAY_SIZE(iov)-1); 5224 } 5225 5226 out_close: 5227 server->ops->close(xid, tcon, &fid); 5228 5229 /* 5230 * If CREATE was successful but either setting ATTR_SYSTEM failed or 5231 * writing type/data information failed then remove the intermediate 5232 * object created by CREATE. Otherwise intermediate empty object stay 5233 * on the server. 5234 */ 5235 if (rc) 5236 server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL); 5237 5238 out: 5239 kfree(symname_utf16); 5240 return rc; 5241 } 5242 5243 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5244 struct dentry *dentry, struct cifs_tcon *tcon, 5245 const char *full_path, umode_t mode, dev_t dev) 5246 { 5247 struct inode *new = NULL; 5248 int rc; 5249 5250 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5251 full_path, mode, dev, NULL); 5252 if (rc) 5253 return rc; 5254 5255 if (tcon->posix_extensions) { 5256 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5257 inode->i_sb, xid); 5258 } else if (tcon->unix_ext) { 5259 rc = cifs_get_inode_info_unix(&new, full_path, 5260 inode->i_sb, xid); 5261 } else { 5262 rc = cifs_get_inode_info(&new, full_path, NULL, 5263 inode->i_sb, xid, NULL); 5264 } 5265 if (!rc) 5266 d_instantiate(dentry, new); 5267 return rc; 5268 } 5269 5270 static int smb2_make_node(unsigned int xid, struct inode *inode, 5271 struct dentry *dentry, struct cifs_tcon *tcon, 5272 const char *full_path, umode_t mode, dev_t dev) 5273 { 5274 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5275 int rc = -EOPNOTSUPP; 5276 5277 /* 5278 * Check if mounted with mount parm 'sfu' mount parm. 5279 * SFU emulation should work with all servers, but only 5280 * supports block and char device, socket & fifo, 5281 * and was used by default in earlier versions of Windows 5282 */ 5283 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5284 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5285 full_path, mode, dev); 5286 } else if (CIFS_REPARSE_SUPPORT(tcon)) { 5287 rc = mknod_reparse(xid, inode, dentry, tcon, 5288 full_path, mode, dev); 5289 } 5290 return rc; 5291 } 5292 5293 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5294 struct smb_version_operations smb20_operations = { 5295 .compare_fids = smb2_compare_fids, 5296 .setup_request = smb2_setup_request, 5297 .setup_async_request = smb2_setup_async_request, 5298 .check_receive = smb2_check_receive, 5299 .add_credits = smb2_add_credits, 5300 .set_credits = smb2_set_credits, 5301 .get_credits_field = smb2_get_credits_field, 5302 .get_credits = smb2_get_credits, 5303 .wait_mtu_credits = cifs_wait_mtu_credits, 5304 .get_next_mid = smb2_get_next_mid, 5305 .revert_current_mid = smb2_revert_current_mid, 5306 .read_data_offset = smb2_read_data_offset, 5307 .read_data_length = smb2_read_data_length, 5308 .map_error = map_smb2_to_linux_error, 5309 .find_mid = smb2_find_mid, 5310 .check_message = smb2_check_message, 5311 .dump_detail = smb2_dump_detail, 5312 .clear_stats = smb2_clear_stats, 5313 .print_stats = smb2_print_stats, 5314 .is_oplock_break = smb2_is_valid_oplock_break, 5315 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5316 .downgrade_oplock = smb2_downgrade_oplock, 5317 .need_neg = smb2_need_neg, 5318 .negotiate = smb2_negotiate, 5319 .negotiate_wsize = smb2_negotiate_wsize, 5320 .negotiate_rsize = smb2_negotiate_rsize, 5321 .sess_setup = SMB2_sess_setup, 5322 .logoff = SMB2_logoff, 5323 .tree_connect = SMB2_tcon, 5324 .tree_disconnect = SMB2_tdis, 5325 .qfs_tcon = smb2_qfs_tcon, 5326 .is_path_accessible = smb2_is_path_accessible, 5327 .can_echo = smb2_can_echo, 5328 .echo = SMB2_echo, 5329 .query_path_info = smb2_query_path_info, 5330 .query_reparse_point = smb2_query_reparse_point, 5331 .get_srv_inum = smb2_get_srv_inum, 5332 .query_file_info = smb2_query_file_info, 5333 .set_path_size = smb2_set_path_size, 5334 .set_file_size = smb2_set_file_size, 5335 .set_file_info = smb2_set_file_info, 5336 .set_compression = smb2_set_compression, 5337 .mkdir = smb2_mkdir, 5338 .mkdir_setinfo = smb2_mkdir_setinfo, 5339 .rmdir = smb2_rmdir, 5340 .unlink = smb2_unlink, 5341 .rename = smb2_rename_path, 5342 .create_hardlink = smb2_create_hardlink, 5343 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5344 .query_mf_symlink = smb3_query_mf_symlink, 5345 .create_mf_symlink = smb3_create_mf_symlink, 5346 .create_reparse_inode = smb2_create_reparse_inode, 5347 .open = smb2_open_file, 5348 .set_fid = smb2_set_fid, 5349 .close = smb2_close_file, 5350 .flush = smb2_flush_file, 5351 .async_readv = smb2_async_readv, 5352 .async_writev = smb2_async_writev, 5353 .sync_read = smb2_sync_read, 5354 .sync_write = smb2_sync_write, 5355 .query_dir_first = smb2_query_dir_first, 5356 .query_dir_next = smb2_query_dir_next, 5357 .close_dir = smb2_close_dir, 5358 .calc_smb_size = smb2_calc_size, 5359 .is_status_pending = smb2_is_status_pending, 5360 .is_session_expired = smb2_is_session_expired, 5361 .oplock_response = smb2_oplock_response, 5362 .queryfs = smb2_queryfs, 5363 .mand_lock = smb2_mand_lock, 5364 .mand_unlock_range = smb2_unlock_range, 5365 .push_mand_locks = smb2_push_mandatory_locks, 5366 .get_lease_key = smb2_get_lease_key, 5367 .set_lease_key = smb2_set_lease_key, 5368 .new_lease_key = smb2_new_lease_key, 5369 .calc_signature = smb2_calc_signature, 5370 .is_read_op = smb2_is_read_op, 5371 .set_oplock_level = smb2_set_oplock_level, 5372 .create_lease_buf = smb2_create_lease_buf, 5373 .parse_lease_buf = smb2_parse_lease_buf, 5374 .copychunk_range = smb2_copychunk_range, 5375 .wp_retry_size = smb2_wp_retry_size, 5376 .dir_needs_close = smb2_dir_needs_close, 5377 .get_dfs_refer = smb2_get_dfs_refer, 5378 .select_sectype = smb2_select_sectype, 5379 #ifdef CONFIG_CIFS_XATTR 5380 .query_all_EAs = smb2_query_eas, 5381 .set_EA = smb2_set_ea, 5382 #endif /* CIFS_XATTR */ 5383 .get_acl = get_smb2_acl, 5384 .get_acl_by_fid = get_smb2_acl_by_fid, 5385 .set_acl = set_smb2_acl, 5386 .next_header = smb2_next_header, 5387 .ioctl_query_info = smb2_ioctl_query_info, 5388 .make_node = smb2_make_node, 5389 .fiemap = smb3_fiemap, 5390 .llseek = smb3_llseek, 5391 .is_status_io_timeout = smb2_is_status_io_timeout, 5392 .is_network_name_deleted = smb2_is_network_name_deleted, 5393 .rename_pending_delete = smb2_rename_pending_delete, 5394 }; 5395 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5396 5397 struct smb_version_operations smb21_operations = { 5398 .compare_fids = smb2_compare_fids, 5399 .setup_request = smb2_setup_request, 5400 .setup_async_request = smb2_setup_async_request, 5401 .check_receive = smb2_check_receive, 5402 .add_credits = smb2_add_credits, 5403 .set_credits = smb2_set_credits, 5404 .get_credits_field = smb2_get_credits_field, 5405 .get_credits = smb2_get_credits, 5406 .wait_mtu_credits = smb2_wait_mtu_credits, 5407 .adjust_credits = smb2_adjust_credits, 5408 .get_next_mid = smb2_get_next_mid, 5409 .revert_current_mid = smb2_revert_current_mid, 5410 .read_data_offset = smb2_read_data_offset, 5411 .read_data_length = smb2_read_data_length, 5412 .map_error = map_smb2_to_linux_error, 5413 .find_mid = smb2_find_mid, 5414 .check_message = smb2_check_message, 5415 .dump_detail = smb2_dump_detail, 5416 .clear_stats = smb2_clear_stats, 5417 .print_stats = smb2_print_stats, 5418 .is_oplock_break = smb2_is_valid_oplock_break, 5419 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5420 .downgrade_oplock = smb2_downgrade_oplock, 5421 .need_neg = smb2_need_neg, 5422 .negotiate = smb2_negotiate, 5423 .negotiate_wsize = smb2_negotiate_wsize, 5424 .negotiate_rsize = smb2_negotiate_rsize, 5425 .sess_setup = SMB2_sess_setup, 5426 .logoff = SMB2_logoff, 5427 .tree_connect = SMB2_tcon, 5428 .tree_disconnect = SMB2_tdis, 5429 .qfs_tcon = smb2_qfs_tcon, 5430 .is_path_accessible = smb2_is_path_accessible, 5431 .can_echo = smb2_can_echo, 5432 .echo = SMB2_echo, 5433 .query_path_info = smb2_query_path_info, 5434 .query_reparse_point = smb2_query_reparse_point, 5435 .get_srv_inum = smb2_get_srv_inum, 5436 .query_file_info = smb2_query_file_info, 5437 .set_path_size = smb2_set_path_size, 5438 .set_file_size = smb2_set_file_size, 5439 .set_file_info = smb2_set_file_info, 5440 .set_compression = smb2_set_compression, 5441 .mkdir = smb2_mkdir, 5442 .mkdir_setinfo = smb2_mkdir_setinfo, 5443 .rmdir = smb2_rmdir, 5444 .unlink = smb2_unlink, 5445 .rename = smb2_rename_path, 5446 .create_hardlink = smb2_create_hardlink, 5447 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5448 .query_mf_symlink = smb3_query_mf_symlink, 5449 .create_mf_symlink = smb3_create_mf_symlink, 5450 .create_reparse_inode = smb2_create_reparse_inode, 5451 .open = smb2_open_file, 5452 .set_fid = smb2_set_fid, 5453 .close = smb2_close_file, 5454 .flush = smb2_flush_file, 5455 .async_readv = smb2_async_readv, 5456 .async_writev = smb2_async_writev, 5457 .sync_read = smb2_sync_read, 5458 .sync_write = smb2_sync_write, 5459 .query_dir_first = smb2_query_dir_first, 5460 .query_dir_next = smb2_query_dir_next, 5461 .close_dir = smb2_close_dir, 5462 .calc_smb_size = smb2_calc_size, 5463 .is_status_pending = smb2_is_status_pending, 5464 .is_session_expired = smb2_is_session_expired, 5465 .oplock_response = smb2_oplock_response, 5466 .queryfs = smb2_queryfs, 5467 .mand_lock = smb2_mand_lock, 5468 .mand_unlock_range = smb2_unlock_range, 5469 .push_mand_locks = smb2_push_mandatory_locks, 5470 .get_lease_key = smb2_get_lease_key, 5471 .set_lease_key = smb2_set_lease_key, 5472 .new_lease_key = smb2_new_lease_key, 5473 .calc_signature = smb2_calc_signature, 5474 .is_read_op = smb21_is_read_op, 5475 .set_oplock_level = smb21_set_oplock_level, 5476 .create_lease_buf = smb2_create_lease_buf, 5477 .parse_lease_buf = smb2_parse_lease_buf, 5478 .copychunk_range = smb2_copychunk_range, 5479 .wp_retry_size = smb2_wp_retry_size, 5480 .dir_needs_close = smb2_dir_needs_close, 5481 .enum_snapshots = smb3_enum_snapshots, 5482 .notify = smb3_notify, 5483 .get_dfs_refer = smb2_get_dfs_refer, 5484 .select_sectype = smb2_select_sectype, 5485 #ifdef CONFIG_CIFS_XATTR 5486 .query_all_EAs = smb2_query_eas, 5487 .set_EA = smb2_set_ea, 5488 #endif /* CIFS_XATTR */ 5489 .get_acl = get_smb2_acl, 5490 .get_acl_by_fid = get_smb2_acl_by_fid, 5491 .set_acl = set_smb2_acl, 5492 .next_header = smb2_next_header, 5493 .ioctl_query_info = smb2_ioctl_query_info, 5494 .make_node = smb2_make_node, 5495 .fiemap = smb3_fiemap, 5496 .llseek = smb3_llseek, 5497 .is_status_io_timeout = smb2_is_status_io_timeout, 5498 .is_network_name_deleted = smb2_is_network_name_deleted, 5499 .rename_pending_delete = smb2_rename_pending_delete, 5500 }; 5501 5502 struct smb_version_operations smb30_operations = { 5503 .compare_fids = smb2_compare_fids, 5504 .setup_request = smb2_setup_request, 5505 .setup_async_request = smb2_setup_async_request, 5506 .check_receive = smb2_check_receive, 5507 .add_credits = smb2_add_credits, 5508 .set_credits = smb2_set_credits, 5509 .get_credits_field = smb2_get_credits_field, 5510 .get_credits = smb2_get_credits, 5511 .wait_mtu_credits = smb2_wait_mtu_credits, 5512 .adjust_credits = smb2_adjust_credits, 5513 .get_next_mid = smb2_get_next_mid, 5514 .revert_current_mid = smb2_revert_current_mid, 5515 .read_data_offset = smb2_read_data_offset, 5516 .read_data_length = smb2_read_data_length, 5517 .map_error = map_smb2_to_linux_error, 5518 .find_mid = smb2_find_mid, 5519 .check_message = smb2_check_message, 5520 .dump_detail = smb2_dump_detail, 5521 .clear_stats = smb2_clear_stats, 5522 .print_stats = smb2_print_stats, 5523 .dump_share_caps = smb2_dump_share_caps, 5524 .is_oplock_break = smb2_is_valid_oplock_break, 5525 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5526 .downgrade_oplock = smb3_downgrade_oplock, 5527 .need_neg = smb2_need_neg, 5528 .negotiate = smb2_negotiate, 5529 .negotiate_wsize = smb3_negotiate_wsize, 5530 .negotiate_rsize = smb3_negotiate_rsize, 5531 .sess_setup = SMB2_sess_setup, 5532 .logoff = SMB2_logoff, 5533 .tree_connect = SMB2_tcon, 5534 .tree_disconnect = SMB2_tdis, 5535 .qfs_tcon = smb3_qfs_tcon, 5536 .query_server_interfaces = SMB3_request_interfaces, 5537 .is_path_accessible = smb2_is_path_accessible, 5538 .can_echo = smb2_can_echo, 5539 .echo = SMB2_echo, 5540 .query_path_info = smb2_query_path_info, 5541 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5542 .query_reparse_point = smb2_query_reparse_point, 5543 .get_srv_inum = smb2_get_srv_inum, 5544 .query_file_info = smb2_query_file_info, 5545 .set_path_size = smb2_set_path_size, 5546 .set_file_size = smb2_set_file_size, 5547 .set_file_info = smb2_set_file_info, 5548 .set_compression = smb2_set_compression, 5549 .mkdir = smb2_mkdir, 5550 .mkdir_setinfo = smb2_mkdir_setinfo, 5551 .rmdir = smb2_rmdir, 5552 .unlink = smb2_unlink, 5553 .rename = smb2_rename_path, 5554 .create_hardlink = smb2_create_hardlink, 5555 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5556 .query_mf_symlink = smb3_query_mf_symlink, 5557 .create_mf_symlink = smb3_create_mf_symlink, 5558 .create_reparse_inode = smb2_create_reparse_inode, 5559 .open = smb2_open_file, 5560 .set_fid = smb2_set_fid, 5561 .close = smb2_close_file, 5562 .close_getattr = smb2_close_getattr, 5563 .flush = smb2_flush_file, 5564 .async_readv = smb2_async_readv, 5565 .async_writev = smb2_async_writev, 5566 .sync_read = smb2_sync_read, 5567 .sync_write = smb2_sync_write, 5568 .query_dir_first = smb2_query_dir_first, 5569 .query_dir_next = smb2_query_dir_next, 5570 .close_dir = smb2_close_dir, 5571 .calc_smb_size = smb2_calc_size, 5572 .is_status_pending = smb2_is_status_pending, 5573 .is_session_expired = smb2_is_session_expired, 5574 .oplock_response = smb2_oplock_response, 5575 .queryfs = smb2_queryfs, 5576 .mand_lock = smb2_mand_lock, 5577 .mand_unlock_range = smb2_unlock_range, 5578 .push_mand_locks = smb2_push_mandatory_locks, 5579 .get_lease_key = smb2_get_lease_key, 5580 .set_lease_key = smb2_set_lease_key, 5581 .new_lease_key = smb2_new_lease_key, 5582 .generate_signingkey = generate_smb30signingkey, 5583 .calc_signature = smb3_calc_signature, 5584 .set_integrity = smb3_set_integrity, 5585 .is_read_op = smb21_is_read_op, 5586 .set_oplock_level = smb3_set_oplock_level, 5587 .create_lease_buf = smb3_create_lease_buf, 5588 .parse_lease_buf = smb3_parse_lease_buf, 5589 .copychunk_range = smb2_copychunk_range, 5590 .duplicate_extents = smb2_duplicate_extents, 5591 .validate_negotiate = smb3_validate_negotiate, 5592 .wp_retry_size = smb2_wp_retry_size, 5593 .dir_needs_close = smb2_dir_needs_close, 5594 .fallocate = smb3_fallocate, 5595 .enum_snapshots = smb3_enum_snapshots, 5596 .notify = smb3_notify, 5597 .init_transform_rq = smb3_init_transform_rq, 5598 .is_transform_hdr = smb3_is_transform_hdr, 5599 .receive_transform = smb3_receive_transform, 5600 .get_dfs_refer = smb2_get_dfs_refer, 5601 .select_sectype = smb2_select_sectype, 5602 #ifdef CONFIG_CIFS_XATTR 5603 .query_all_EAs = smb2_query_eas, 5604 .set_EA = smb2_set_ea, 5605 #endif /* CIFS_XATTR */ 5606 .get_acl = get_smb2_acl, 5607 .get_acl_by_fid = get_smb2_acl_by_fid, 5608 .set_acl = set_smb2_acl, 5609 .next_header = smb2_next_header, 5610 .ioctl_query_info = smb2_ioctl_query_info, 5611 .make_node = smb2_make_node, 5612 .fiemap = smb3_fiemap, 5613 .llseek = smb3_llseek, 5614 .is_status_io_timeout = smb2_is_status_io_timeout, 5615 .is_network_name_deleted = smb2_is_network_name_deleted, 5616 .rename_pending_delete = smb2_rename_pending_delete, 5617 }; 5618 5619 struct smb_version_operations smb311_operations = { 5620 .compare_fids = smb2_compare_fids, 5621 .setup_request = smb2_setup_request, 5622 .setup_async_request = smb2_setup_async_request, 5623 .check_receive = smb2_check_receive, 5624 .add_credits = smb2_add_credits, 5625 .set_credits = smb2_set_credits, 5626 .get_credits_field = smb2_get_credits_field, 5627 .get_credits = smb2_get_credits, 5628 .wait_mtu_credits = smb2_wait_mtu_credits, 5629 .adjust_credits = smb2_adjust_credits, 5630 .get_next_mid = smb2_get_next_mid, 5631 .revert_current_mid = smb2_revert_current_mid, 5632 .read_data_offset = smb2_read_data_offset, 5633 .read_data_length = smb2_read_data_length, 5634 .map_error = map_smb2_to_linux_error, 5635 .find_mid = smb2_find_mid, 5636 .check_message = smb2_check_message, 5637 .dump_detail = smb2_dump_detail, 5638 .clear_stats = smb2_clear_stats, 5639 .print_stats = smb2_print_stats, 5640 .dump_share_caps = smb2_dump_share_caps, 5641 .is_oplock_break = smb2_is_valid_oplock_break, 5642 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5643 .downgrade_oplock = smb3_downgrade_oplock, 5644 .need_neg = smb2_need_neg, 5645 .negotiate = smb2_negotiate, 5646 .negotiate_wsize = smb3_negotiate_wsize, 5647 .negotiate_rsize = smb3_negotiate_rsize, 5648 .sess_setup = SMB2_sess_setup, 5649 .logoff = SMB2_logoff, 5650 .tree_connect = SMB2_tcon, 5651 .tree_disconnect = SMB2_tdis, 5652 .qfs_tcon = smb3_qfs_tcon, 5653 .query_server_interfaces = SMB3_request_interfaces, 5654 .is_path_accessible = smb2_is_path_accessible, 5655 .can_echo = smb2_can_echo, 5656 .echo = SMB2_echo, 5657 .query_path_info = smb2_query_path_info, 5658 .query_reparse_point = smb2_query_reparse_point, 5659 .get_srv_inum = smb2_get_srv_inum, 5660 .query_file_info = smb2_query_file_info, 5661 .set_path_size = smb2_set_path_size, 5662 .set_file_size = smb2_set_file_size, 5663 .set_file_info = smb2_set_file_info, 5664 .set_compression = smb2_set_compression, 5665 .mkdir = smb2_mkdir, 5666 .mkdir_setinfo = smb2_mkdir_setinfo, 5667 .posix_mkdir = smb311_posix_mkdir, 5668 .rmdir = smb2_rmdir, 5669 .unlink = smb2_unlink, 5670 .rename = smb2_rename_path, 5671 .create_hardlink = smb2_create_hardlink, 5672 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5673 .query_mf_symlink = smb3_query_mf_symlink, 5674 .create_mf_symlink = smb3_create_mf_symlink, 5675 .create_reparse_inode = smb2_create_reparse_inode, 5676 .open = smb2_open_file, 5677 .set_fid = smb2_set_fid, 5678 .close = smb2_close_file, 5679 .close_getattr = smb2_close_getattr, 5680 .flush = smb2_flush_file, 5681 .async_readv = smb2_async_readv, 5682 .async_writev = smb2_async_writev, 5683 .sync_read = smb2_sync_read, 5684 .sync_write = smb2_sync_write, 5685 .query_dir_first = smb2_query_dir_first, 5686 .query_dir_next = smb2_query_dir_next, 5687 .close_dir = smb2_close_dir, 5688 .calc_smb_size = smb2_calc_size, 5689 .is_status_pending = smb2_is_status_pending, 5690 .is_session_expired = smb2_is_session_expired, 5691 .oplock_response = smb2_oplock_response, 5692 .queryfs = smb311_queryfs, 5693 .mand_lock = smb2_mand_lock, 5694 .mand_unlock_range = smb2_unlock_range, 5695 .push_mand_locks = smb2_push_mandatory_locks, 5696 .get_lease_key = smb2_get_lease_key, 5697 .set_lease_key = smb2_set_lease_key, 5698 .new_lease_key = smb2_new_lease_key, 5699 .generate_signingkey = generate_smb311signingkey, 5700 .calc_signature = smb3_calc_signature, 5701 .set_integrity = smb3_set_integrity, 5702 .is_read_op = smb21_is_read_op, 5703 .set_oplock_level = smb3_set_oplock_level, 5704 .create_lease_buf = smb3_create_lease_buf, 5705 .parse_lease_buf = smb3_parse_lease_buf, 5706 .copychunk_range = smb2_copychunk_range, 5707 .duplicate_extents = smb2_duplicate_extents, 5708 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5709 .wp_retry_size = smb2_wp_retry_size, 5710 .dir_needs_close = smb2_dir_needs_close, 5711 .fallocate = smb3_fallocate, 5712 .enum_snapshots = smb3_enum_snapshots, 5713 .notify = smb3_notify, 5714 .init_transform_rq = smb3_init_transform_rq, 5715 .is_transform_hdr = smb3_is_transform_hdr, 5716 .receive_transform = smb3_receive_transform, 5717 .get_dfs_refer = smb2_get_dfs_refer, 5718 .select_sectype = smb2_select_sectype, 5719 #ifdef CONFIG_CIFS_XATTR 5720 .query_all_EAs = smb2_query_eas, 5721 .set_EA = smb2_set_ea, 5722 #endif /* CIFS_XATTR */ 5723 .get_acl = get_smb2_acl, 5724 .get_acl_by_fid = get_smb2_acl_by_fid, 5725 .set_acl = set_smb2_acl, 5726 .next_header = smb2_next_header, 5727 .ioctl_query_info = smb2_ioctl_query_info, 5728 .make_node = smb2_make_node, 5729 .fiemap = smb3_fiemap, 5730 .llseek = smb3_llseek, 5731 .is_status_io_timeout = smb2_is_status_io_timeout, 5732 .is_network_name_deleted = smb2_is_network_name_deleted, 5733 .rename_pending_delete = smb2_rename_pending_delete, 5734 }; 5735 5736 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5737 struct smb_version_values smb20_values = { 5738 .version_string = SMB20_VERSION_STRING, 5739 .protocol_id = SMB20_PROT_ID, 5740 .req_capabilities = 0, /* MBZ */ 5741 .large_lock_type = 0, 5742 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5743 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5744 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5745 .header_size = sizeof(struct smb2_hdr), 5746 .header_preamble_size = 0, 5747 .max_header_size = MAX_SMB2_HDR_SIZE, 5748 .read_rsp_size = sizeof(struct smb2_read_rsp), 5749 .lock_cmd = SMB2_LOCK, 5750 .cap_unix = 0, 5751 .cap_nt_find = SMB2_NT_FIND, 5752 .cap_large_files = SMB2_LARGE_FILES, 5753 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5754 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5755 .create_lease_size = sizeof(struct create_lease), 5756 }; 5757 #endif /* ALLOW_INSECURE_LEGACY */ 5758 5759 struct smb_version_values smb21_values = { 5760 .version_string = SMB21_VERSION_STRING, 5761 .protocol_id = SMB21_PROT_ID, 5762 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5763 .large_lock_type = 0, 5764 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5765 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5766 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5767 .header_size = sizeof(struct smb2_hdr), 5768 .header_preamble_size = 0, 5769 .max_header_size = MAX_SMB2_HDR_SIZE, 5770 .read_rsp_size = sizeof(struct smb2_read_rsp), 5771 .lock_cmd = SMB2_LOCK, 5772 .cap_unix = 0, 5773 .cap_nt_find = SMB2_NT_FIND, 5774 .cap_large_files = SMB2_LARGE_FILES, 5775 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5776 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5777 .create_lease_size = sizeof(struct create_lease), 5778 }; 5779 5780 struct smb_version_values smb3any_values = { 5781 .version_string = SMB3ANY_VERSION_STRING, 5782 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5783 .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, 5784 .large_lock_type = 0, 5785 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5786 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5787 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5788 .header_size = sizeof(struct smb2_hdr), 5789 .header_preamble_size = 0, 5790 .max_header_size = MAX_SMB2_HDR_SIZE, 5791 .read_rsp_size = sizeof(struct smb2_read_rsp), 5792 .lock_cmd = SMB2_LOCK, 5793 .cap_unix = 0, 5794 .cap_nt_find = SMB2_NT_FIND, 5795 .cap_large_files = SMB2_LARGE_FILES, 5796 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5797 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5798 .create_lease_size = sizeof(struct create_lease_v2), 5799 }; 5800 5801 struct smb_version_values smbdefault_values = { 5802 .version_string = SMBDEFAULT_VERSION_STRING, 5803 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5804 .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, 5805 .large_lock_type = 0, 5806 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5807 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5808 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5809 .header_size = sizeof(struct smb2_hdr), 5810 .header_preamble_size = 0, 5811 .max_header_size = MAX_SMB2_HDR_SIZE, 5812 .read_rsp_size = sizeof(struct smb2_read_rsp), 5813 .lock_cmd = SMB2_LOCK, 5814 .cap_unix = 0, 5815 .cap_nt_find = SMB2_NT_FIND, 5816 .cap_large_files = SMB2_LARGE_FILES, 5817 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5818 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5819 .create_lease_size = sizeof(struct create_lease_v2), 5820 }; 5821 5822 struct smb_version_values smb30_values = { 5823 .version_string = SMB30_VERSION_STRING, 5824 .protocol_id = SMB30_PROT_ID, 5825 .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, 5826 .large_lock_type = 0, 5827 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5828 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5829 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5830 .header_size = sizeof(struct smb2_hdr), 5831 .header_preamble_size = 0, 5832 .max_header_size = MAX_SMB2_HDR_SIZE, 5833 .read_rsp_size = sizeof(struct smb2_read_rsp), 5834 .lock_cmd = SMB2_LOCK, 5835 .cap_unix = 0, 5836 .cap_nt_find = SMB2_NT_FIND, 5837 .cap_large_files = SMB2_LARGE_FILES, 5838 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5839 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5840 .create_lease_size = sizeof(struct create_lease_v2), 5841 }; 5842 5843 struct smb_version_values smb302_values = { 5844 .version_string = SMB302_VERSION_STRING, 5845 .protocol_id = SMB302_PROT_ID, 5846 .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, 5847 .large_lock_type = 0, 5848 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5849 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5850 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5851 .header_size = sizeof(struct smb2_hdr), 5852 .header_preamble_size = 0, 5853 .max_header_size = MAX_SMB2_HDR_SIZE, 5854 .read_rsp_size = sizeof(struct smb2_read_rsp), 5855 .lock_cmd = SMB2_LOCK, 5856 .cap_unix = 0, 5857 .cap_nt_find = SMB2_NT_FIND, 5858 .cap_large_files = SMB2_LARGE_FILES, 5859 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5860 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5861 .create_lease_size = sizeof(struct create_lease_v2), 5862 }; 5863 5864 struct smb_version_values smb311_values = { 5865 .version_string = SMB311_VERSION_STRING, 5866 .protocol_id = SMB311_PROT_ID, 5867 .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, 5868 .large_lock_type = 0, 5869 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5870 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5871 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5872 .header_size = sizeof(struct smb2_hdr), 5873 .header_preamble_size = 0, 5874 .max_header_size = MAX_SMB2_HDR_SIZE, 5875 .read_rsp_size = sizeof(struct smb2_read_rsp), 5876 .lock_cmd = SMB2_LOCK, 5877 .cap_unix = 0, 5878 .cap_nt_find = SMB2_NT_FIND, 5879 .cap_large_files = SMB2_LARGE_FILES, 5880 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5881 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5882 .create_lease_size = sizeof(struct create_lease_v2), 5883 }; 5884