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 struct smbdirect_socket_parameters *sp = 508 &server->smbd_conn->socket.parameters; 509 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 wsize = min_t(unsigned int, 516 wsize, 517 sp->max_fragmented_send_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 wsize = min_t(unsigned int, 522 wsize, sp->max_read_write_size); 523 } 524 #endif 525 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 526 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 527 528 return prevent_zero_iosize(wsize, "w"); 529 } 530 531 static unsigned int 532 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 533 { 534 struct TCP_Server_Info *server = tcon->ses->server; 535 unsigned int rsize; 536 537 /* start with specified rsize, or default */ 538 rsize = ctx->got_rsize ? ctx->vol_rsize : CIFS_DEFAULT_IOSIZE; 539 rsize = min_t(unsigned int, rsize, server->max_read); 540 541 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 542 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 543 544 return prevent_zero_iosize(rsize, "r"); 545 } 546 547 static unsigned int 548 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 549 { 550 struct TCP_Server_Info *server = tcon->ses->server; 551 unsigned int rsize; 552 553 /* start with specified rsize, or default */ 554 rsize = ctx->got_rsize ? ctx->vol_rsize : SMB3_DEFAULT_IOSIZE; 555 rsize = min_t(unsigned int, rsize, server->max_read); 556 #ifdef CONFIG_CIFS_SMB_DIRECT 557 if (server->rdma) { 558 struct smbdirect_socket_parameters *sp = 559 &server->smbd_conn->socket.parameters; 560 561 if (server->sign) 562 /* 563 * Account for SMB2 data transfer packet header and 564 * possible encryption header 565 */ 566 rsize = min_t(unsigned int, 567 rsize, 568 sp->max_fragmented_recv_size - 569 SMB2_READWRITE_PDU_HEADER_SIZE - 570 sizeof(struct smb2_transform_hdr)); 571 else 572 rsize = min_t(unsigned int, 573 rsize, sp->max_read_write_size); 574 } 575 #endif 576 577 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 578 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 579 580 return prevent_zero_iosize(rsize, "r"); 581 } 582 583 /* 584 * compare two interfaces a and b 585 * return 0 if everything matches. 586 * return 1 if a is rdma capable, or rss capable, or has higher link speed 587 * return -1 otherwise. 588 */ 589 static int 590 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 591 { 592 int cmp_ret = 0; 593 594 WARN_ON(!a || !b); 595 if (a->rdma_capable == b->rdma_capable) { 596 if (a->rss_capable == b->rss_capable) { 597 if (a->speed == b->speed) { 598 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 599 (struct sockaddr *) &b->sockaddr); 600 if (!cmp_ret) 601 return 0; 602 else if (cmp_ret > 0) 603 return 1; 604 else 605 return -1; 606 } else if (a->speed > b->speed) 607 return 1; 608 else 609 return -1; 610 } else if (a->rss_capable > b->rss_capable) 611 return 1; 612 else 613 return -1; 614 } else if (a->rdma_capable > b->rdma_capable) 615 return 1; 616 else 617 return -1; 618 } 619 620 static int 621 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 622 size_t buf_len, struct cifs_ses *ses, bool in_mount) 623 { 624 struct network_interface_info_ioctl_rsp *p; 625 struct sockaddr_in *addr4; 626 struct sockaddr_in6 *addr6; 627 struct iface_info_ipv4 *p4; 628 struct iface_info_ipv6 *p6; 629 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 630 struct cifs_server_iface tmp_iface; 631 ssize_t bytes_left; 632 size_t next = 0; 633 int nb_iface = 0; 634 int rc = 0, ret = 0; 635 636 bytes_left = buf_len; 637 p = buf; 638 639 spin_lock(&ses->iface_lock); 640 /* do not query too frequently, this time with lock held */ 641 if (ses->iface_last_update && 642 time_before(jiffies, ses->iface_last_update + 643 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 644 spin_unlock(&ses->iface_lock); 645 return 0; 646 } 647 648 /* 649 * Go through iface_list and mark them as inactive 650 */ 651 list_for_each_entry_safe(iface, niface, &ses->iface_list, 652 iface_head) 653 iface->is_active = 0; 654 655 spin_unlock(&ses->iface_lock); 656 657 /* 658 * Samba server e.g. can return an empty interface list in some cases, 659 * which would only be a problem if we were requesting multichannel 660 */ 661 if (bytes_left == 0) { 662 /* avoid spamming logs every 10 minutes, so log only in mount */ 663 if ((ses->chan_max > 1) && in_mount) 664 cifs_dbg(VFS, 665 "multichannel not available\n" 666 "Empty network interface list returned by server %s\n", 667 ses->server->hostname); 668 rc = -EOPNOTSUPP; 669 ses->iface_last_update = jiffies; 670 goto out; 671 } 672 673 while (bytes_left >= (ssize_t)sizeof(*p)) { 674 memset(&tmp_iface, 0, sizeof(tmp_iface)); 675 /* default to 1Gbps when link speed is unset */ 676 tmp_iface.speed = le64_to_cpu(p->LinkSpeed) ?: 1000000000; 677 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 678 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 679 680 switch (p->Family) { 681 /* 682 * The kernel and wire socket structures have the same 683 * layout and use network byte order but make the 684 * conversion explicit in case either one changes. 685 */ 686 case INTERNETWORK: 687 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 688 p4 = (struct iface_info_ipv4 *)p->Buffer; 689 addr4->sin_family = AF_INET; 690 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 691 692 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 693 addr4->sin_port = cpu_to_be16(CIFS_PORT); 694 695 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 696 &addr4->sin_addr); 697 break; 698 case INTERNETWORKV6: 699 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 700 p6 = (struct iface_info_ipv6 *)p->Buffer; 701 addr6->sin6_family = AF_INET6; 702 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 703 704 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 705 addr6->sin6_flowinfo = 0; 706 addr6->sin6_scope_id = 0; 707 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 708 709 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 710 &addr6->sin6_addr); 711 break; 712 default: 713 cifs_dbg(VFS, 714 "%s: skipping unsupported socket family\n", 715 __func__); 716 goto next_iface; 717 } 718 719 /* 720 * The iface_list is assumed to be sorted by speed. 721 * Check if the new interface exists in that list. 722 * NEVER change iface. it could be in use. 723 * Add a new one instead 724 */ 725 spin_lock(&ses->iface_lock); 726 list_for_each_entry_safe(iface, niface, &ses->iface_list, 727 iface_head) { 728 ret = iface_cmp(iface, &tmp_iface); 729 if (!ret) { 730 iface->is_active = 1; 731 spin_unlock(&ses->iface_lock); 732 goto next_iface; 733 } else if (ret < 0) { 734 /* all remaining ifaces are slower */ 735 kref_get(&iface->refcount); 736 break; 737 } 738 } 739 spin_unlock(&ses->iface_lock); 740 741 /* no match. insert the entry in the list */ 742 info = kmalloc(sizeof(struct cifs_server_iface), 743 GFP_KERNEL); 744 if (!info) { 745 rc = -ENOMEM; 746 goto out; 747 } 748 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 749 750 /* add this new entry to the list */ 751 kref_init(&info->refcount); 752 info->is_active = 1; 753 754 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 755 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 756 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 757 le32_to_cpu(p->Capability)); 758 759 spin_lock(&ses->iface_lock); 760 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 761 list_add_tail(&info->iface_head, &iface->iface_head); 762 kref_put(&iface->refcount, release_iface); 763 } else 764 list_add_tail(&info->iface_head, &ses->iface_list); 765 766 ses->iface_count++; 767 spin_unlock(&ses->iface_lock); 768 next_iface: 769 nb_iface++; 770 next = le32_to_cpu(p->Next); 771 if (!next) { 772 bytes_left -= sizeof(*p); 773 break; 774 } 775 /* 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 if (cfid->has_lease) { 958 close_cached_dir(cfid); 959 return 0; 960 } 961 close_cached_dir(cfid); 962 } 963 964 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 965 if (!utf16_path) 966 return -ENOMEM; 967 968 oparms = (struct cifs_open_parms) { 969 .tcon = tcon, 970 .path = full_path, 971 .desired_access = FILE_READ_ATTRIBUTES, 972 .disposition = FILE_OPEN, 973 .create_options = cifs_create_options(cifs_sb, 0), 974 .fid = &fid, 975 }; 976 977 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 978 &err_iov, &err_buftype); 979 if (rc) { 980 struct smb2_hdr *hdr = err_iov.iov_base; 981 982 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 983 goto out; 984 985 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 986 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 987 full_path, &islink); 988 if (rc2) { 989 rc = rc2; 990 goto out; 991 } 992 if (islink) 993 rc = -EREMOTE; 994 } 995 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && 996 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 997 rc = -EOPNOTSUPP; 998 goto out; 999 } 1000 1001 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 1002 1003 out: 1004 free_rsp_buf(err_buftype, err_iov.iov_base); 1005 kfree(utf16_path); 1006 return rc; 1007 } 1008 1009 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 1010 struct cifs_sb_info *cifs_sb, const char *full_path, 1011 u64 *uniqueid, struct cifs_open_info_data *data) 1012 { 1013 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 1014 return 0; 1015 } 1016 1017 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 1018 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 1019 { 1020 struct cifs_fid *fid = &cfile->fid; 1021 1022 if (cfile->symlink_target) { 1023 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 1024 if (!data->symlink_target) 1025 return -ENOMEM; 1026 } 1027 data->contains_posix_file_info = false; 1028 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 1029 } 1030 1031 #ifdef CONFIG_CIFS_XATTR 1032 static ssize_t 1033 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 1034 struct smb2_file_full_ea_info *src, size_t src_size, 1035 const unsigned char *ea_name) 1036 { 1037 int rc = 0; 1038 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 1039 char *name, *value; 1040 size_t buf_size = dst_size; 1041 size_t name_len, value_len, user_name_len; 1042 1043 while (src_size > 0) { 1044 name_len = (size_t)src->ea_name_length; 1045 value_len = (size_t)le16_to_cpu(src->ea_value_length); 1046 1047 if (name_len == 0) 1048 break; 1049 1050 if (src_size < 8 + name_len + 1 + value_len) { 1051 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 1052 rc = -EIO; 1053 goto out; 1054 } 1055 1056 name = &src->ea_data[0]; 1057 value = &src->ea_data[src->ea_name_length + 1]; 1058 1059 if (ea_name) { 1060 if (ea_name_len == name_len && 1061 memcmp(ea_name, name, name_len) == 0) { 1062 rc = value_len; 1063 if (dst_size == 0) 1064 goto out; 1065 if (dst_size < value_len) { 1066 rc = -ERANGE; 1067 goto out; 1068 } 1069 memcpy(dst, value, value_len); 1070 goto out; 1071 } 1072 } else { 1073 /* 'user.' plus a terminating null */ 1074 user_name_len = 5 + 1 + name_len; 1075 1076 if (buf_size == 0) { 1077 /* skip copy - calc size only */ 1078 rc += user_name_len; 1079 } else if (dst_size >= user_name_len) { 1080 dst_size -= user_name_len; 1081 memcpy(dst, "user.", 5); 1082 dst += 5; 1083 memcpy(dst, src->ea_data, name_len); 1084 dst += name_len; 1085 *dst = 0; 1086 ++dst; 1087 rc += user_name_len; 1088 } else { 1089 /* stop before overrun buffer */ 1090 rc = -ERANGE; 1091 break; 1092 } 1093 } 1094 1095 if (!src->next_entry_offset) 1096 break; 1097 1098 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1099 /* stop before overrun buffer */ 1100 rc = -ERANGE; 1101 break; 1102 } 1103 src_size -= le32_to_cpu(src->next_entry_offset); 1104 src = (void *)((char *)src + 1105 le32_to_cpu(src->next_entry_offset)); 1106 } 1107 1108 /* didn't find the named attribute */ 1109 if (ea_name) 1110 rc = -ENODATA; 1111 1112 out: 1113 return (ssize_t)rc; 1114 } 1115 1116 static ssize_t 1117 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1118 const unsigned char *path, const unsigned char *ea_name, 1119 char *ea_data, size_t buf_size, 1120 struct cifs_sb_info *cifs_sb) 1121 { 1122 int rc; 1123 struct kvec rsp_iov = {NULL, 0}; 1124 int buftype = CIFS_NO_BUFFER; 1125 struct smb2_query_info_rsp *rsp; 1126 struct smb2_file_full_ea_info *info = NULL; 1127 1128 rc = smb2_query_info_compound(xid, tcon, path, 1129 FILE_READ_EA, 1130 FILE_FULL_EA_INFORMATION, 1131 SMB2_O_INFO_FILE, 1132 CIFSMaxBufSize - 1133 MAX_SMB2_CREATE_RESPONSE_SIZE - 1134 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1135 &rsp_iov, &buftype, cifs_sb); 1136 if (rc) { 1137 /* 1138 * If ea_name is NULL (listxattr) and there are no EAs, 1139 * return 0 as it's not an error. Otherwise, the specified 1140 * ea_name was not found. 1141 */ 1142 if (!ea_name && rc == -ENODATA) 1143 rc = 0; 1144 goto qeas_exit; 1145 } 1146 1147 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1148 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1149 le32_to_cpu(rsp->OutputBufferLength), 1150 &rsp_iov, 1151 sizeof(struct smb2_file_full_ea_info)); 1152 if (rc) 1153 goto qeas_exit; 1154 1155 info = (struct smb2_file_full_ea_info *)( 1156 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1157 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1158 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1159 1160 qeas_exit: 1161 free_rsp_buf(buftype, rsp_iov.iov_base); 1162 return rc; 1163 } 1164 1165 static int 1166 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1167 const char *path, const char *ea_name, const void *ea_value, 1168 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1169 struct cifs_sb_info *cifs_sb) 1170 { 1171 struct smb2_compound_vars *vars; 1172 struct cifs_ses *ses = tcon->ses; 1173 struct TCP_Server_Info *server; 1174 struct smb_rqst *rqst; 1175 struct kvec *rsp_iov; 1176 __le16 *utf16_path = NULL; 1177 int ea_name_len = strlen(ea_name); 1178 int flags = CIFS_CP_CREATE_CLOSE_OP; 1179 int len; 1180 int resp_buftype[3]; 1181 struct cifs_open_parms oparms; 1182 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1183 struct cifs_fid fid; 1184 unsigned int size[1]; 1185 void *data[1]; 1186 struct smb2_file_full_ea_info *ea; 1187 struct smb2_query_info_rsp *rsp; 1188 int rc, used_len = 0; 1189 int retries = 0, cur_sleep = 1; 1190 1191 replay_again: 1192 /* reinitialize for possible replay */ 1193 flags = CIFS_CP_CREATE_CLOSE_OP; 1194 oplock = SMB2_OPLOCK_LEVEL_NONE; 1195 server = cifs_pick_channel(ses); 1196 1197 if (smb3_encryption_required(tcon)) 1198 flags |= CIFS_TRANSFORM_REQ; 1199 1200 if (ea_name_len > 255) 1201 return -EINVAL; 1202 1203 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1204 if (!utf16_path) 1205 return -ENOMEM; 1206 1207 ea = NULL; 1208 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1209 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1210 if (!vars) { 1211 rc = -ENOMEM; 1212 goto out_free_path; 1213 } 1214 rqst = vars->rqst; 1215 rsp_iov = vars->rsp_iov; 1216 1217 if (ses->server->ops->query_all_EAs) { 1218 if (!ea_value) { 1219 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1220 ea_name, NULL, 0, 1221 cifs_sb); 1222 if (rc == -ENODATA) 1223 goto sea_exit; 1224 } else { 1225 /* If we are adding a attribute we should first check 1226 * if there will be enough space available to store 1227 * the new EA. If not we should not add it since we 1228 * would not be able to even read the EAs back. 1229 */ 1230 rc = smb2_query_info_compound(xid, tcon, path, 1231 FILE_READ_EA, 1232 FILE_FULL_EA_INFORMATION, 1233 SMB2_O_INFO_FILE, 1234 CIFSMaxBufSize - 1235 MAX_SMB2_CREATE_RESPONSE_SIZE - 1236 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1237 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1238 if (rc == 0) { 1239 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1240 used_len = le32_to_cpu(rsp->OutputBufferLength); 1241 } 1242 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1243 resp_buftype[1] = CIFS_NO_BUFFER; 1244 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1245 rc = 0; 1246 1247 /* Use a fudge factor of 256 bytes in case we collide 1248 * with a different set_EAs command. 1249 */ 1250 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1251 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1252 used_len + ea_name_len + ea_value_len + 1) { 1253 rc = -ENOSPC; 1254 goto sea_exit; 1255 } 1256 } 1257 } 1258 1259 /* Open */ 1260 rqst[0].rq_iov = vars->open_iov; 1261 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1262 1263 oparms = (struct cifs_open_parms) { 1264 .tcon = tcon, 1265 .path = path, 1266 .desired_access = FILE_WRITE_EA, 1267 .disposition = FILE_OPEN, 1268 .create_options = cifs_create_options(cifs_sb, 0), 1269 .fid = &fid, 1270 .replay = !!(retries), 1271 }; 1272 1273 rc = SMB2_open_init(tcon, server, 1274 &rqst[0], &oplock, &oparms, utf16_path); 1275 if (rc) 1276 goto sea_exit; 1277 smb2_set_next_command(tcon, &rqst[0]); 1278 1279 1280 /* Set Info */ 1281 rqst[1].rq_iov = vars->si_iov; 1282 rqst[1].rq_nvec = 1; 1283 1284 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1285 ea = kzalloc(len, GFP_KERNEL); 1286 if (ea == NULL) { 1287 rc = -ENOMEM; 1288 goto sea_exit; 1289 } 1290 1291 ea->ea_name_length = ea_name_len; 1292 ea->ea_value_length = cpu_to_le16(ea_value_len); 1293 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1294 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1295 1296 size[0] = len; 1297 data[0] = ea; 1298 1299 rc = SMB2_set_info_init(tcon, server, 1300 &rqst[1], COMPOUND_FID, 1301 COMPOUND_FID, current->tgid, 1302 FILE_FULL_EA_INFORMATION, 1303 SMB2_O_INFO_FILE, 0, data, size); 1304 if (rc) 1305 goto sea_exit; 1306 smb2_set_next_command(tcon, &rqst[1]); 1307 smb2_set_related(&rqst[1]); 1308 1309 /* Close */ 1310 rqst[2].rq_iov = &vars->close_iov; 1311 rqst[2].rq_nvec = 1; 1312 rc = SMB2_close_init(tcon, server, 1313 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1314 if (rc) 1315 goto sea_exit; 1316 smb2_set_related(&rqst[2]); 1317 1318 if (retries) { 1319 smb2_set_replay(server, &rqst[0]); 1320 smb2_set_replay(server, &rqst[1]); 1321 smb2_set_replay(server, &rqst[2]); 1322 } 1323 1324 rc = compound_send_recv(xid, ses, server, 1325 flags, 3, rqst, 1326 resp_buftype, rsp_iov); 1327 /* no need to bump num_remote_opens because handle immediately closed */ 1328 1329 sea_exit: 1330 kfree(ea); 1331 SMB2_open_free(&rqst[0]); 1332 SMB2_set_info_free(&rqst[1]); 1333 SMB2_close_free(&rqst[2]); 1334 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1335 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1336 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1337 kfree(vars); 1338 out_free_path: 1339 kfree(utf16_path); 1340 1341 if (is_replayable_error(rc) && 1342 smb2_should_replay(tcon, &retries, &cur_sleep)) 1343 goto replay_again; 1344 1345 return rc; 1346 } 1347 #endif 1348 1349 static bool 1350 smb2_can_echo(struct TCP_Server_Info *server) 1351 { 1352 return server->echoes; 1353 } 1354 1355 static void 1356 smb2_clear_stats(struct cifs_tcon *tcon) 1357 { 1358 int i; 1359 1360 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1361 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1362 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1363 } 1364 } 1365 1366 static void 1367 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1368 { 1369 seq_puts(m, "\n\tShare Capabilities:"); 1370 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1371 seq_puts(m, " DFS,"); 1372 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1373 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1374 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1375 seq_puts(m, " SCALEOUT,"); 1376 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1377 seq_puts(m, " CLUSTER,"); 1378 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1379 seq_puts(m, " ASYMMETRIC,"); 1380 if (tcon->capabilities == 0) 1381 seq_puts(m, " None"); 1382 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1383 seq_puts(m, " Aligned,"); 1384 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1385 seq_puts(m, " Partition Aligned,"); 1386 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1387 seq_puts(m, " SSD,"); 1388 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1389 seq_puts(m, " TRIM-support,"); 1390 1391 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1392 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1393 if (tcon->perf_sector_size) 1394 seq_printf(m, "\tOptimal sector size: 0x%x", 1395 tcon->perf_sector_size); 1396 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1397 } 1398 1399 static void 1400 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1401 { 1402 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1403 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1404 1405 /* 1406 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1407 * totals (requests sent) since those SMBs are per-session not per tcon 1408 */ 1409 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1410 (long long)(tcon->bytes_read), 1411 (long long)(tcon->bytes_written)); 1412 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1413 atomic_read(&tcon->num_local_opens), 1414 atomic_read(&tcon->num_remote_opens)); 1415 seq_printf(m, "\nTreeConnects: %d total %d failed", 1416 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1417 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1418 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1419 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1420 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1421 seq_printf(m, "\nCreates: %d total %d failed", 1422 atomic_read(&sent[SMB2_CREATE_HE]), 1423 atomic_read(&failed[SMB2_CREATE_HE])); 1424 seq_printf(m, "\nCloses: %d total %d failed", 1425 atomic_read(&sent[SMB2_CLOSE_HE]), 1426 atomic_read(&failed[SMB2_CLOSE_HE])); 1427 seq_printf(m, "\nFlushes: %d total %d failed", 1428 atomic_read(&sent[SMB2_FLUSH_HE]), 1429 atomic_read(&failed[SMB2_FLUSH_HE])); 1430 seq_printf(m, "\nReads: %d total %d failed", 1431 atomic_read(&sent[SMB2_READ_HE]), 1432 atomic_read(&failed[SMB2_READ_HE])); 1433 seq_printf(m, "\nWrites: %d total %d failed", 1434 atomic_read(&sent[SMB2_WRITE_HE]), 1435 atomic_read(&failed[SMB2_WRITE_HE])); 1436 seq_printf(m, "\nLocks: %d total %d failed", 1437 atomic_read(&sent[SMB2_LOCK_HE]), 1438 atomic_read(&failed[SMB2_LOCK_HE])); 1439 seq_printf(m, "\nIOCTLs: %d total %d failed", 1440 atomic_read(&sent[SMB2_IOCTL_HE]), 1441 atomic_read(&failed[SMB2_IOCTL_HE])); 1442 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1443 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1444 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1445 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1446 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1447 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1448 seq_printf(m, "\nQueryInfos: %d total %d failed", 1449 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1450 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1451 seq_printf(m, "\nSetInfos: %d total %d failed", 1452 atomic_read(&sent[SMB2_SET_INFO_HE]), 1453 atomic_read(&failed[SMB2_SET_INFO_HE])); 1454 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1455 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1456 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1457 } 1458 1459 static void 1460 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1461 { 1462 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1463 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1464 1465 cfile->fid.persistent_fid = fid->persistent_fid; 1466 cfile->fid.volatile_fid = fid->volatile_fid; 1467 cfile->fid.access = fid->access; 1468 #ifdef CONFIG_CIFS_DEBUG2 1469 cfile->fid.mid = fid->mid; 1470 #endif /* CIFS_DEBUG2 */ 1471 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1472 &fid->purge_cache); 1473 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1474 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1475 } 1476 1477 static int 1478 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1479 struct cifs_fid *fid) 1480 { 1481 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1482 } 1483 1484 static int 1485 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1486 struct cifsFileInfo *cfile) 1487 { 1488 struct smb2_file_network_open_info file_inf; 1489 struct inode *inode; 1490 int rc; 1491 1492 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1493 cfile->fid.volatile_fid, &file_inf); 1494 if (rc) 1495 return rc; 1496 1497 inode = d_inode(cfile->dentry); 1498 1499 spin_lock(&inode->i_lock); 1500 CIFS_I(inode)->time = jiffies; 1501 1502 /* Creation time should not need to be updated on close */ 1503 if (file_inf.LastWriteTime) 1504 inode_set_mtime_to_ts(inode, 1505 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1506 if (file_inf.ChangeTime) 1507 inode_set_ctime_to_ts(inode, 1508 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1509 if (file_inf.LastAccessTime) 1510 inode_set_atime_to_ts(inode, 1511 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1512 1513 /* 1514 * i_blocks is not related to (i_size / i_blksize), 1515 * but instead 512 byte (2**9) size is required for 1516 * calculating num blocks. 1517 */ 1518 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1519 inode->i_blocks = 1520 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1521 1522 /* End of file and Attributes should not have to be updated on close */ 1523 spin_unlock(&inode->i_lock); 1524 return rc; 1525 } 1526 1527 static int 1528 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1529 u64 persistent_fid, u64 volatile_fid, 1530 struct copychunk_ioctl *pcchunk) 1531 { 1532 int rc; 1533 unsigned int ret_data_len; 1534 struct resume_key_req *res_key; 1535 1536 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1537 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1538 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1539 1540 if (rc == -EOPNOTSUPP) { 1541 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1542 goto req_res_key_exit; 1543 } else if (rc) { 1544 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1545 goto req_res_key_exit; 1546 } 1547 if (ret_data_len < sizeof(struct resume_key_req)) { 1548 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1549 rc = -EINVAL; 1550 goto req_res_key_exit; 1551 } 1552 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1553 1554 req_res_key_exit: 1555 kfree(res_key); 1556 return rc; 1557 } 1558 1559 static int 1560 smb2_ioctl_query_info(const unsigned int xid, 1561 struct cifs_tcon *tcon, 1562 struct cifs_sb_info *cifs_sb, 1563 __le16 *path, int is_dir, 1564 unsigned long p) 1565 { 1566 struct smb2_compound_vars *vars; 1567 struct smb_rqst *rqst; 1568 struct kvec *rsp_iov; 1569 struct cifs_ses *ses = tcon->ses; 1570 struct TCP_Server_Info *server; 1571 char __user *arg = (char __user *)p; 1572 struct smb_query_info qi; 1573 struct smb_query_info __user *pqi; 1574 int rc = 0; 1575 int flags = CIFS_CP_CREATE_CLOSE_OP; 1576 struct smb2_query_info_rsp *qi_rsp = NULL; 1577 struct smb2_ioctl_rsp *io_rsp = NULL; 1578 void *buffer = NULL; 1579 int resp_buftype[3]; 1580 struct cifs_open_parms oparms; 1581 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1582 struct cifs_fid fid; 1583 unsigned int size[2]; 1584 void *data[2]; 1585 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1586 void (*free_req1_func)(struct smb_rqst *r); 1587 int retries = 0, cur_sleep = 1; 1588 1589 replay_again: 1590 /* reinitialize for possible replay */ 1591 flags = CIFS_CP_CREATE_CLOSE_OP; 1592 oplock = SMB2_OPLOCK_LEVEL_NONE; 1593 server = cifs_pick_channel(ses); 1594 1595 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1596 if (vars == NULL) 1597 return -ENOMEM; 1598 rqst = &vars->rqst[0]; 1599 rsp_iov = &vars->rsp_iov[0]; 1600 1601 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1602 1603 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1604 rc = -EFAULT; 1605 goto free_vars; 1606 } 1607 if (qi.output_buffer_length > 1024) { 1608 rc = -EINVAL; 1609 goto free_vars; 1610 } 1611 1612 if (!ses || !server) { 1613 rc = -EIO; 1614 goto free_vars; 1615 } 1616 1617 if (smb3_encryption_required(tcon)) 1618 flags |= CIFS_TRANSFORM_REQ; 1619 1620 if (qi.output_buffer_length) { 1621 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1622 if (IS_ERR(buffer)) { 1623 rc = PTR_ERR(buffer); 1624 goto free_vars; 1625 } 1626 } 1627 1628 /* Open */ 1629 rqst[0].rq_iov = &vars->open_iov[0]; 1630 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1631 1632 oparms = (struct cifs_open_parms) { 1633 .tcon = tcon, 1634 .disposition = FILE_OPEN, 1635 .create_options = cifs_create_options(cifs_sb, create_options), 1636 .fid = &fid, 1637 .replay = !!(retries), 1638 }; 1639 1640 if (qi.flags & PASSTHRU_FSCTL) { 1641 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1642 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1643 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1644 break; 1645 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1646 oparms.desired_access = GENERIC_ALL; 1647 break; 1648 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1649 oparms.desired_access = GENERIC_READ; 1650 break; 1651 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1652 oparms.desired_access = GENERIC_WRITE; 1653 break; 1654 } 1655 } else if (qi.flags & PASSTHRU_SET_INFO) { 1656 oparms.desired_access = GENERIC_WRITE; 1657 } else { 1658 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1659 } 1660 1661 rc = SMB2_open_init(tcon, server, 1662 &rqst[0], &oplock, &oparms, path); 1663 if (rc) 1664 goto free_output_buffer; 1665 smb2_set_next_command(tcon, &rqst[0]); 1666 1667 /* Query */ 1668 if (qi.flags & PASSTHRU_FSCTL) { 1669 /* Can eventually relax perm check since server enforces too */ 1670 if (!capable(CAP_SYS_ADMIN)) { 1671 rc = -EPERM; 1672 goto free_open_req; 1673 } 1674 rqst[1].rq_iov = &vars->io_iov[0]; 1675 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1676 1677 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1678 qi.info_type, buffer, qi.output_buffer_length, 1679 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1680 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1681 free_req1_func = SMB2_ioctl_free; 1682 } else if (qi.flags == PASSTHRU_SET_INFO) { 1683 /* Can eventually relax perm check since server enforces too */ 1684 if (!capable(CAP_SYS_ADMIN)) { 1685 rc = -EPERM; 1686 goto free_open_req; 1687 } 1688 if (qi.output_buffer_length < 8) { 1689 rc = -EINVAL; 1690 goto free_open_req; 1691 } 1692 rqst[1].rq_iov = vars->si_iov; 1693 rqst[1].rq_nvec = 1; 1694 1695 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1696 size[0] = 8; 1697 data[0] = buffer; 1698 1699 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1700 current->tgid, FILE_END_OF_FILE_INFORMATION, 1701 SMB2_O_INFO_FILE, 0, data, size); 1702 free_req1_func = SMB2_set_info_free; 1703 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1704 rqst[1].rq_iov = &vars->qi_iov; 1705 rqst[1].rq_nvec = 1; 1706 1707 rc = SMB2_query_info_init(tcon, server, 1708 &rqst[1], COMPOUND_FID, 1709 COMPOUND_FID, qi.file_info_class, 1710 qi.info_type, qi.additional_information, 1711 qi.input_buffer_length, 1712 qi.output_buffer_length, buffer); 1713 free_req1_func = SMB2_query_info_free; 1714 } else { /* unknown flags */ 1715 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1716 qi.flags); 1717 rc = -EINVAL; 1718 } 1719 1720 if (rc) 1721 goto free_open_req; 1722 smb2_set_next_command(tcon, &rqst[1]); 1723 smb2_set_related(&rqst[1]); 1724 1725 /* Close */ 1726 rqst[2].rq_iov = &vars->close_iov; 1727 rqst[2].rq_nvec = 1; 1728 1729 rc = SMB2_close_init(tcon, server, 1730 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1731 if (rc) 1732 goto free_req_1; 1733 smb2_set_related(&rqst[2]); 1734 1735 if (retries) { 1736 smb2_set_replay(server, &rqst[0]); 1737 smb2_set_replay(server, &rqst[1]); 1738 smb2_set_replay(server, &rqst[2]); 1739 } 1740 1741 rc = compound_send_recv(xid, ses, server, 1742 flags, 3, rqst, 1743 resp_buftype, rsp_iov); 1744 if (rc) 1745 goto out; 1746 1747 /* No need to bump num_remote_opens since handle immediately closed */ 1748 if (qi.flags & PASSTHRU_FSCTL) { 1749 pqi = (struct smb_query_info __user *)arg; 1750 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1751 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1752 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1753 if (qi.input_buffer_length > 0 && 1754 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1755 > rsp_iov[1].iov_len) { 1756 rc = -EFAULT; 1757 goto out; 1758 } 1759 1760 if (copy_to_user(&pqi->input_buffer_length, 1761 &qi.input_buffer_length, 1762 sizeof(qi.input_buffer_length))) { 1763 rc = -EFAULT; 1764 goto out; 1765 } 1766 1767 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1768 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1769 qi.input_buffer_length)) 1770 rc = -EFAULT; 1771 } else { 1772 pqi = (struct smb_query_info __user *)arg; 1773 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1774 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1775 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1776 if (copy_to_user(&pqi->input_buffer_length, 1777 &qi.input_buffer_length, 1778 sizeof(qi.input_buffer_length))) { 1779 rc = -EFAULT; 1780 goto out; 1781 } 1782 1783 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1784 qi.input_buffer_length)) 1785 rc = -EFAULT; 1786 } 1787 1788 out: 1789 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1790 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1791 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1792 SMB2_close_free(&rqst[2]); 1793 free_req_1: 1794 free_req1_func(&rqst[1]); 1795 free_open_req: 1796 SMB2_open_free(&rqst[0]); 1797 free_output_buffer: 1798 kfree(buffer); 1799 free_vars: 1800 kfree(vars); 1801 1802 if (is_replayable_error(rc) && 1803 smb2_should_replay(tcon, &retries, &cur_sleep)) 1804 goto replay_again; 1805 1806 return rc; 1807 } 1808 1809 static ssize_t 1810 smb2_copychunk_range(const unsigned int xid, 1811 struct cifsFileInfo *srcfile, 1812 struct cifsFileInfo *trgtfile, u64 src_off, 1813 u64 len, u64 dest_off) 1814 { 1815 int rc; 1816 unsigned int ret_data_len; 1817 struct copychunk_ioctl *pcchunk; 1818 struct copychunk_ioctl_rsp *retbuf = NULL; 1819 struct cifs_tcon *tcon; 1820 int chunks_copied = 0; 1821 bool chunk_sizes_updated = false; 1822 ssize_t bytes_written, total_bytes_written = 0; 1823 1824 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1825 if (pcchunk == NULL) 1826 return -ENOMEM; 1827 1828 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1829 /* Request a key from the server to identify the source of the copy */ 1830 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1831 srcfile->fid.persistent_fid, 1832 srcfile->fid.volatile_fid, pcchunk); 1833 1834 /* Note: request_res_key sets res_key null only if rc !=0 */ 1835 if (rc) 1836 goto cchunk_out; 1837 1838 /* For now array only one chunk long, will make more flexible later */ 1839 pcchunk->ChunkCount = cpu_to_le32(1); 1840 pcchunk->Reserved = 0; 1841 pcchunk->Reserved2 = 0; 1842 1843 tcon = tlink_tcon(trgtfile->tlink); 1844 1845 trace_smb3_copychunk_enter(xid, srcfile->fid.volatile_fid, 1846 trgtfile->fid.volatile_fid, tcon->tid, 1847 tcon->ses->Suid, src_off, dest_off, len); 1848 1849 while (len > 0) { 1850 pcchunk->SourceOffset = cpu_to_le64(src_off); 1851 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1852 pcchunk->Length = 1853 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1854 1855 /* Request server copy to target from src identified by key */ 1856 kfree(retbuf); 1857 retbuf = NULL; 1858 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1859 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1860 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1861 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1862 if (rc == 0) { 1863 if (ret_data_len != 1864 sizeof(struct copychunk_ioctl_rsp)) { 1865 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1866 rc = -EIO; 1867 goto cchunk_out; 1868 } 1869 if (retbuf->TotalBytesWritten == 0) { 1870 cifs_dbg(FYI, "no bytes copied\n"); 1871 rc = -EIO; 1872 goto cchunk_out; 1873 } 1874 /* 1875 * Check if server claimed to write more than we asked 1876 */ 1877 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1878 le32_to_cpu(pcchunk->Length)) { 1879 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1880 rc = -EIO; 1881 goto cchunk_out; 1882 } 1883 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1884 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1885 rc = -EIO; 1886 goto cchunk_out; 1887 } 1888 chunks_copied++; 1889 1890 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1891 src_off += bytes_written; 1892 dest_off += bytes_written; 1893 len -= bytes_written; 1894 total_bytes_written += bytes_written; 1895 1896 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1897 le32_to_cpu(retbuf->ChunksWritten), 1898 le32_to_cpu(retbuf->ChunkBytesWritten), 1899 bytes_written); 1900 trace_smb3_copychunk_done(xid, srcfile->fid.volatile_fid, 1901 trgtfile->fid.volatile_fid, tcon->tid, 1902 tcon->ses->Suid, src_off, dest_off, len); 1903 } else if (rc == -EINVAL) { 1904 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1905 goto cchunk_out; 1906 1907 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1908 le32_to_cpu(retbuf->ChunksWritten), 1909 le32_to_cpu(retbuf->ChunkBytesWritten), 1910 le32_to_cpu(retbuf->TotalBytesWritten)); 1911 1912 /* 1913 * Check if this is the first request using these sizes, 1914 * (ie check if copy succeed once with original sizes 1915 * and check if the server gave us different sizes after 1916 * we already updated max sizes on previous request). 1917 * if not then why is the server returning an error now 1918 */ 1919 if ((chunks_copied != 0) || chunk_sizes_updated) 1920 goto cchunk_out; 1921 1922 /* Check that server is not asking us to grow size */ 1923 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1924 tcon->max_bytes_chunk) 1925 tcon->max_bytes_chunk = 1926 le32_to_cpu(retbuf->ChunkBytesWritten); 1927 else 1928 goto cchunk_out; /* server gave us bogus size */ 1929 1930 /* No need to change MaxChunks since already set to 1 */ 1931 chunk_sizes_updated = true; 1932 } else 1933 goto cchunk_out; 1934 } 1935 1936 cchunk_out: 1937 kfree(pcchunk); 1938 kfree(retbuf); 1939 if (rc) 1940 return rc; 1941 else 1942 return total_bytes_written; 1943 } 1944 1945 static int 1946 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1947 struct cifs_fid *fid) 1948 { 1949 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1950 } 1951 1952 static unsigned int 1953 smb2_read_data_offset(char *buf) 1954 { 1955 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1956 1957 return rsp->DataOffset; 1958 } 1959 1960 static unsigned int 1961 smb2_read_data_length(char *buf, bool in_remaining) 1962 { 1963 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1964 1965 if (in_remaining) 1966 return le32_to_cpu(rsp->DataRemaining); 1967 1968 return le32_to_cpu(rsp->DataLength); 1969 } 1970 1971 1972 static int 1973 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1974 struct cifs_io_parms *parms, unsigned int *bytes_read, 1975 char **buf, int *buf_type) 1976 { 1977 parms->persistent_fid = pfid->persistent_fid; 1978 parms->volatile_fid = pfid->volatile_fid; 1979 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1980 } 1981 1982 static int 1983 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1984 struct cifs_io_parms *parms, unsigned int *written, 1985 struct kvec *iov, unsigned long nr_segs) 1986 { 1987 1988 parms->persistent_fid = pfid->persistent_fid; 1989 parms->volatile_fid = pfid->volatile_fid; 1990 return SMB2_write(xid, parms, written, iov, nr_segs); 1991 } 1992 1993 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1994 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1995 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1996 { 1997 struct cifsInodeInfo *cifsi; 1998 int rc; 1999 2000 cifsi = CIFS_I(inode); 2001 2002 /* if file already sparse don't bother setting sparse again */ 2003 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 2004 return true; /* already sparse */ 2005 2006 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 2007 return true; /* already not sparse */ 2008 2009 /* 2010 * Can't check for sparse support on share the usual way via the 2011 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 2012 * since Samba server doesn't set the flag on the share, yet 2013 * supports the set sparse FSCTL and returns sparse correctly 2014 * in the file attributes. If we fail setting sparse though we 2015 * mark that server does not support sparse files for this share 2016 * to avoid repeatedly sending the unsupported fsctl to server 2017 * if the file is repeatedly extended. 2018 */ 2019 if (tcon->broken_sparse_sup) 2020 return false; 2021 2022 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2023 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 2024 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 2025 if (rc) { 2026 tcon->broken_sparse_sup = true; 2027 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 2028 return false; 2029 } 2030 2031 if (setsparse) 2032 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 2033 else 2034 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 2035 2036 return true; 2037 } 2038 2039 static int 2040 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 2041 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 2042 { 2043 struct inode *inode; 2044 2045 /* 2046 * If extending file more than one page make sparse. Many Linux fs 2047 * make files sparse by default when extending via ftruncate 2048 */ 2049 inode = d_inode(cfile->dentry); 2050 2051 if (!set_alloc && (size > inode->i_size + 8192)) { 2052 __u8 set_sparse = 1; 2053 2054 /* whether set sparse succeeds or not, extend the file */ 2055 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 2056 } 2057 2058 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 2059 cfile->fid.volatile_fid, cfile->pid, size); 2060 } 2061 2062 static int 2063 smb2_duplicate_extents(const unsigned int xid, 2064 struct cifsFileInfo *srcfile, 2065 struct cifsFileInfo *trgtfile, u64 src_off, 2066 u64 len, u64 dest_off) 2067 { 2068 int rc; 2069 unsigned int ret_data_len; 2070 struct inode *inode; 2071 struct duplicate_extents_to_file dup_ext_buf; 2072 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2073 2074 /* server fileays advertise duplicate extent support with this flag */ 2075 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2076 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2077 return -EOPNOTSUPP; 2078 2079 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2080 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2081 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2082 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2083 dup_ext_buf.ByteCount = cpu_to_le64(len); 2084 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2085 src_off, dest_off, len); 2086 trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid, 2087 trgtfile->fid.volatile_fid, tcon->tid, 2088 tcon->ses->Suid, src_off, dest_off, len); 2089 inode = d_inode(trgtfile->dentry); 2090 if (inode->i_size < dest_off + len) { 2091 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2092 if (rc) 2093 goto duplicate_extents_out; 2094 2095 /* 2096 * Although also could set plausible allocation size (i_blocks) 2097 * here in addition to setting the file size, in reflink 2098 * it is likely that the target file is sparse. Its allocation 2099 * size will be queried on next revalidate, but it is important 2100 * to make sure that file's cached size is updated immediately 2101 */ 2102 netfs_resize_file(netfs_inode(inode), dest_off + len, true); 2103 cifs_setsize(inode, dest_off + len); 2104 } 2105 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2106 trgtfile->fid.volatile_fid, 2107 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2108 (char *)&dup_ext_buf, 2109 sizeof(struct duplicate_extents_to_file), 2110 CIFSMaxBufSize, NULL, 2111 &ret_data_len); 2112 2113 if (ret_data_len > 0) 2114 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2115 2116 duplicate_extents_out: 2117 if (rc) 2118 trace_smb3_clone_err(xid, srcfile->fid.volatile_fid, 2119 trgtfile->fid.volatile_fid, 2120 tcon->tid, tcon->ses->Suid, src_off, 2121 dest_off, len, rc); 2122 else 2123 trace_smb3_clone_done(xid, srcfile->fid.volatile_fid, 2124 trgtfile->fid.volatile_fid, tcon->tid, 2125 tcon->ses->Suid, src_off, dest_off, len); 2126 return rc; 2127 } 2128 2129 static int 2130 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2131 struct cifsFileInfo *cfile) 2132 { 2133 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2134 cfile->fid.volatile_fid); 2135 } 2136 2137 static int 2138 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2139 struct cifsFileInfo *cfile) 2140 { 2141 struct fsctl_set_integrity_information_req integr_info; 2142 unsigned int ret_data_len; 2143 2144 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2145 integr_info.Flags = 0; 2146 integr_info.Reserved = 0; 2147 2148 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2149 cfile->fid.volatile_fid, 2150 FSCTL_SET_INTEGRITY_INFORMATION, 2151 (char *)&integr_info, 2152 sizeof(struct fsctl_set_integrity_information_req), 2153 CIFSMaxBufSize, NULL, 2154 &ret_data_len); 2155 2156 } 2157 2158 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2159 #define GMT_TOKEN_SIZE 50 2160 2161 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2162 2163 /* 2164 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2165 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2166 */ 2167 static int 2168 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2169 struct cifsFileInfo *cfile, void __user *ioc_buf) 2170 { 2171 char *retbuf = NULL; 2172 unsigned int ret_data_len = 0; 2173 int rc; 2174 u32 max_response_size; 2175 struct smb_snapshot_array snapshot_in; 2176 2177 /* 2178 * On the first query to enumerate the list of snapshots available 2179 * for this volume the buffer begins with 0 (number of snapshots 2180 * which can be returned is zero since at that point we do not know 2181 * how big the buffer needs to be). On the second query, 2182 * it (ret_data_len) is set to number of snapshots so we can 2183 * know to set the maximum response size larger (see below). 2184 */ 2185 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2186 return -EFAULT; 2187 2188 /* 2189 * Note that for snapshot queries that servers like Azure expect that 2190 * the first query be minimal size (and just used to get the number/size 2191 * of previous versions) so response size must be specified as EXACTLY 2192 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2193 * of eight bytes. 2194 */ 2195 if (ret_data_len == 0) 2196 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2197 else 2198 max_response_size = CIFSMaxBufSize; 2199 2200 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2201 cfile->fid.volatile_fid, 2202 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2203 NULL, 0 /* no input data */, max_response_size, 2204 (char **)&retbuf, 2205 &ret_data_len); 2206 cifs_dbg(FYI, "enum snapshots ioctl returned %d and ret buflen is %d\n", 2207 rc, ret_data_len); 2208 if (rc) 2209 return rc; 2210 2211 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2212 /* Fixup buffer */ 2213 if (copy_from_user(&snapshot_in, ioc_buf, 2214 sizeof(struct smb_snapshot_array))) { 2215 rc = -EFAULT; 2216 kfree(retbuf); 2217 return rc; 2218 } 2219 2220 /* 2221 * Check for min size, ie not large enough to fit even one GMT 2222 * token (snapshot). On the first ioctl some users may pass in 2223 * smaller size (or zero) to simply get the size of the array 2224 * so the user space caller can allocate sufficient memory 2225 * and retry the ioctl again with larger array size sufficient 2226 * to hold all of the snapshot GMT tokens on the second try. 2227 */ 2228 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2229 ret_data_len = sizeof(struct smb_snapshot_array); 2230 2231 /* 2232 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2233 * the snapshot array (of 50 byte GMT tokens) each 2234 * representing an available previous version of the data 2235 */ 2236 if (ret_data_len > (snapshot_in.snapshot_array_size + 2237 sizeof(struct smb_snapshot_array))) 2238 ret_data_len = snapshot_in.snapshot_array_size + 2239 sizeof(struct smb_snapshot_array); 2240 2241 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2242 rc = -EFAULT; 2243 } 2244 2245 kfree(retbuf); 2246 return rc; 2247 } 2248 2249 2250 2251 static int 2252 smb3_notify(const unsigned int xid, struct file *pfile, 2253 void __user *ioc_buf, bool return_changes) 2254 { 2255 struct smb3_notify_info notify; 2256 struct smb3_notify_info __user *pnotify_buf; 2257 struct dentry *dentry = pfile->f_path.dentry; 2258 struct inode *inode = file_inode(pfile); 2259 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2260 struct cifs_open_parms oparms; 2261 struct cifs_fid fid; 2262 struct cifs_tcon *tcon; 2263 const unsigned char *path; 2264 char *returned_ioctl_info = NULL; 2265 void *page = alloc_dentry_path(); 2266 __le16 *utf16_path = NULL; 2267 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2268 int rc = 0; 2269 __u32 ret_len = 0; 2270 2271 path = build_path_from_dentry(dentry, page); 2272 if (IS_ERR(path)) { 2273 rc = PTR_ERR(path); 2274 goto notify_exit; 2275 } 2276 2277 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2278 if (utf16_path == NULL) { 2279 rc = -ENOMEM; 2280 goto notify_exit; 2281 } 2282 2283 if (return_changes) { 2284 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2285 rc = -EFAULT; 2286 goto notify_exit; 2287 } 2288 } else { 2289 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2290 rc = -EFAULT; 2291 goto notify_exit; 2292 } 2293 notify.data_len = 0; 2294 } 2295 2296 tcon = cifs_sb_master_tcon(cifs_sb); 2297 oparms = (struct cifs_open_parms) { 2298 .tcon = tcon, 2299 .path = path, 2300 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2301 .disposition = FILE_OPEN, 2302 .create_options = cifs_create_options(cifs_sb, 0), 2303 .fid = &fid, 2304 }; 2305 2306 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2307 NULL); 2308 if (rc) 2309 goto notify_exit; 2310 2311 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2312 notify.watch_tree, notify.completion_filter, 2313 notify.data_len, &returned_ioctl_info, &ret_len); 2314 2315 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2316 2317 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2318 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2319 if (ret_len > notify.data_len) 2320 ret_len = notify.data_len; 2321 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2322 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2323 rc = -EFAULT; 2324 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2325 rc = -EFAULT; 2326 } 2327 kfree(returned_ioctl_info); 2328 notify_exit: 2329 free_dentry_path(page); 2330 kfree(utf16_path); 2331 return rc; 2332 } 2333 2334 static int 2335 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2336 const char *path, struct cifs_sb_info *cifs_sb, 2337 struct cifs_fid *fid, __u16 search_flags, 2338 struct cifs_search_info *srch_inf) 2339 { 2340 __le16 *utf16_path; 2341 struct smb_rqst rqst[2]; 2342 struct kvec rsp_iov[2]; 2343 int resp_buftype[2]; 2344 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2345 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2346 int rc, flags = 0; 2347 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2348 struct cifs_open_parms oparms; 2349 struct smb2_query_directory_rsp *qd_rsp = NULL; 2350 struct smb2_create_rsp *op_rsp = NULL; 2351 struct TCP_Server_Info *server; 2352 int retries = 0, cur_sleep = 1; 2353 2354 replay_again: 2355 /* reinitialize for possible replay */ 2356 flags = 0; 2357 oplock = SMB2_OPLOCK_LEVEL_NONE; 2358 server = cifs_pick_channel(tcon->ses); 2359 2360 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2361 if (!utf16_path) 2362 return -ENOMEM; 2363 2364 if (smb3_encryption_required(tcon)) 2365 flags |= CIFS_TRANSFORM_REQ; 2366 2367 memset(rqst, 0, sizeof(rqst)); 2368 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2369 memset(rsp_iov, 0, sizeof(rsp_iov)); 2370 2371 /* Open */ 2372 memset(&open_iov, 0, sizeof(open_iov)); 2373 rqst[0].rq_iov = open_iov; 2374 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2375 2376 oparms = (struct cifs_open_parms) { 2377 .tcon = tcon, 2378 .path = path, 2379 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2380 .disposition = FILE_OPEN, 2381 .create_options = cifs_create_options(cifs_sb, 0), 2382 .fid = fid, 2383 .replay = !!(retries), 2384 }; 2385 2386 rc = SMB2_open_init(tcon, server, 2387 &rqst[0], &oplock, &oparms, utf16_path); 2388 if (rc) 2389 goto qdf_free; 2390 smb2_set_next_command(tcon, &rqst[0]); 2391 2392 /* Query directory */ 2393 srch_inf->entries_in_buffer = 0; 2394 srch_inf->index_of_last_entry = 2; 2395 2396 memset(&qd_iov, 0, sizeof(qd_iov)); 2397 rqst[1].rq_iov = qd_iov; 2398 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2399 2400 rc = SMB2_query_directory_init(xid, tcon, server, 2401 &rqst[1], 2402 COMPOUND_FID, COMPOUND_FID, 2403 0, srch_inf->info_level); 2404 if (rc) 2405 goto qdf_free; 2406 2407 smb2_set_related(&rqst[1]); 2408 2409 if (retries) { 2410 smb2_set_replay(server, &rqst[0]); 2411 smb2_set_replay(server, &rqst[1]); 2412 } 2413 2414 rc = compound_send_recv(xid, tcon->ses, server, 2415 flags, 2, rqst, 2416 resp_buftype, rsp_iov); 2417 2418 /* If the open failed there is nothing to do */ 2419 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2420 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2421 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2422 goto qdf_free; 2423 } 2424 fid->persistent_fid = op_rsp->PersistentFileId; 2425 fid->volatile_fid = op_rsp->VolatileFileId; 2426 2427 /* Anything else than ENODATA means a genuine error */ 2428 if (rc && rc != -ENODATA) { 2429 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2430 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2431 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2432 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2433 goto qdf_free; 2434 } 2435 2436 atomic_inc(&tcon->num_remote_opens); 2437 2438 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2439 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2440 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2441 tcon->tid, tcon->ses->Suid, 0, 0); 2442 srch_inf->endOfSearch = true; 2443 rc = 0; 2444 goto qdf_free; 2445 } 2446 2447 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2448 srch_inf); 2449 if (rc) { 2450 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2451 tcon->ses->Suid, 0, 0, rc); 2452 goto qdf_free; 2453 } 2454 resp_buftype[1] = CIFS_NO_BUFFER; 2455 2456 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2457 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2458 2459 qdf_free: 2460 kfree(utf16_path); 2461 SMB2_open_free(&rqst[0]); 2462 SMB2_query_directory_free(&rqst[1]); 2463 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2464 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2465 2466 if (is_replayable_error(rc) && 2467 smb2_should_replay(tcon, &retries, &cur_sleep)) 2468 goto replay_again; 2469 2470 return rc; 2471 } 2472 2473 static int 2474 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2475 struct cifs_fid *fid, __u16 search_flags, 2476 struct cifs_search_info *srch_inf) 2477 { 2478 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2479 fid->volatile_fid, 0, srch_inf); 2480 } 2481 2482 static int 2483 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2484 struct cifs_fid *fid) 2485 { 2486 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2487 } 2488 2489 /* 2490 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2491 * the number of credits and return true. Otherwise - return false. 2492 */ 2493 static bool 2494 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2495 { 2496 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2497 int scredits, in_flight; 2498 2499 if (shdr->Status != STATUS_PENDING) 2500 return false; 2501 2502 if (shdr->CreditRequest) { 2503 spin_lock(&server->req_lock); 2504 server->credits += le16_to_cpu(shdr->CreditRequest); 2505 scredits = server->credits; 2506 in_flight = server->in_flight; 2507 spin_unlock(&server->req_lock); 2508 wake_up(&server->request_q); 2509 2510 trace_smb3_pend_credits(server->current_mid, 2511 server->conn_id, server->hostname, scredits, 2512 le16_to_cpu(shdr->CreditRequest), in_flight); 2513 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2514 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2515 } 2516 2517 return true; 2518 } 2519 2520 static bool 2521 smb2_is_session_expired(char *buf) 2522 { 2523 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2524 2525 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2526 shdr->Status != STATUS_USER_SESSION_DELETED) 2527 return false; 2528 2529 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2530 le64_to_cpu(shdr->SessionId), 2531 le16_to_cpu(shdr->Command), 2532 le64_to_cpu(shdr->MessageId)); 2533 cifs_dbg(FYI, "Session expired or deleted\n"); 2534 2535 return true; 2536 } 2537 2538 static bool 2539 smb2_is_status_io_timeout(char *buf) 2540 { 2541 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2542 2543 if (shdr->Status == STATUS_IO_TIMEOUT) 2544 return true; 2545 else 2546 return false; 2547 } 2548 2549 static bool 2550 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2551 { 2552 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2553 struct TCP_Server_Info *pserver; 2554 struct cifs_ses *ses; 2555 struct cifs_tcon *tcon; 2556 2557 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2558 return false; 2559 2560 /* If server is a channel, select the primary channel */ 2561 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2562 2563 spin_lock(&cifs_tcp_ses_lock); 2564 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2565 if (cifs_ses_exiting(ses)) 2566 continue; 2567 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2568 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2569 spin_lock(&tcon->tc_lock); 2570 tcon->need_reconnect = true; 2571 spin_unlock(&tcon->tc_lock); 2572 spin_unlock(&cifs_tcp_ses_lock); 2573 pr_warn_once("Server share %s deleted.\n", 2574 tcon->tree_name); 2575 return true; 2576 } 2577 } 2578 } 2579 spin_unlock(&cifs_tcp_ses_lock); 2580 2581 return false; 2582 } 2583 2584 static int 2585 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2586 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2587 { 2588 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2589 return SMB2_lease_break(0, tcon, cinode->lease_key, 2590 smb2_get_lease_state(cinode)); 2591 2592 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2593 CIFS_CACHE_READ(cinode) ? 1 : 0); 2594 } 2595 2596 void 2597 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2598 { 2599 struct smb2_hdr *shdr; 2600 2601 if (server->dialect < SMB30_PROT_ID) 2602 return; 2603 2604 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2605 if (shdr == NULL) { 2606 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2607 return; 2608 } 2609 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2610 } 2611 2612 void 2613 smb2_set_related(struct smb_rqst *rqst) 2614 { 2615 struct smb2_hdr *shdr; 2616 2617 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2618 if (shdr == NULL) { 2619 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2620 return; 2621 } 2622 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2623 } 2624 2625 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2626 2627 void 2628 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2629 { 2630 struct smb2_hdr *shdr; 2631 struct cifs_ses *ses = tcon->ses; 2632 struct TCP_Server_Info *server = ses->server; 2633 unsigned long len = smb_rqst_len(server, rqst); 2634 int num_padding; 2635 2636 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2637 if (shdr == NULL) { 2638 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2639 return; 2640 } 2641 2642 /* SMB headers in a compound are 8 byte aligned. */ 2643 if (IS_ALIGNED(len, 8)) 2644 goto out; 2645 2646 num_padding = 8 - (len & 7); 2647 if (smb3_encryption_required(tcon)) { 2648 int i; 2649 2650 /* 2651 * Flatten request into a single buffer with required padding as 2652 * the encryption layer can't handle the padding iovs. 2653 */ 2654 for (i = 1; i < rqst->rq_nvec; i++) { 2655 memcpy(rqst->rq_iov[0].iov_base + 2656 rqst->rq_iov[0].iov_len, 2657 rqst->rq_iov[i].iov_base, 2658 rqst->rq_iov[i].iov_len); 2659 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2660 } 2661 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2662 0, num_padding); 2663 rqst->rq_iov[0].iov_len += num_padding; 2664 rqst->rq_nvec = 1; 2665 } else { 2666 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2667 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2668 rqst->rq_nvec++; 2669 } 2670 len += num_padding; 2671 out: 2672 shdr->NextCommand = cpu_to_le32(len); 2673 } 2674 2675 /* 2676 * helper function for exponential backoff and check if replayable 2677 */ 2678 bool smb2_should_replay(struct cifs_tcon *tcon, 2679 int *pretries, 2680 int *pcur_sleep) 2681 { 2682 if (!pretries || !pcur_sleep) 2683 return false; 2684 2685 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2686 msleep(*pcur_sleep); 2687 (*pcur_sleep) = ((*pcur_sleep) << 1); 2688 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2689 (*pcur_sleep) = CIFS_MAX_SLEEP; 2690 return true; 2691 } 2692 2693 return false; 2694 } 2695 2696 /* 2697 * Passes the query info response back to the caller on success. 2698 * Caller need to free this with free_rsp_buf(). 2699 */ 2700 int 2701 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2702 const char *path, u32 desired_access, 2703 u32 class, u32 type, u32 output_len, 2704 struct kvec *rsp, int *buftype, 2705 struct cifs_sb_info *cifs_sb) 2706 { 2707 struct smb2_compound_vars *vars; 2708 struct cifs_ses *ses = tcon->ses; 2709 struct TCP_Server_Info *server; 2710 int flags = CIFS_CP_CREATE_CLOSE_OP; 2711 struct smb_rqst *rqst; 2712 int resp_buftype[3]; 2713 struct kvec *rsp_iov; 2714 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2715 struct cifs_open_parms oparms; 2716 struct cifs_fid fid; 2717 int rc; 2718 __le16 *utf16_path; 2719 struct cached_fid *cfid = NULL; 2720 int retries = 0, cur_sleep = 1; 2721 2722 replay_again: 2723 /* reinitialize for possible replay */ 2724 flags = CIFS_CP_CREATE_CLOSE_OP; 2725 oplock = SMB2_OPLOCK_LEVEL_NONE; 2726 server = cifs_pick_channel(ses); 2727 2728 if (!path) 2729 path = ""; 2730 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2731 if (!utf16_path) 2732 return -ENOMEM; 2733 2734 if (smb3_encryption_required(tcon)) 2735 flags |= CIFS_TRANSFORM_REQ; 2736 2737 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2738 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2739 if (!vars) { 2740 rc = -ENOMEM; 2741 goto out_free_path; 2742 } 2743 rqst = vars->rqst; 2744 rsp_iov = vars->rsp_iov; 2745 2746 /* 2747 * We can only call this for things we know are directories. 2748 */ 2749 if (!strcmp(path, "")) 2750 open_cached_dir(xid, tcon, path, cifs_sb, false, 2751 &cfid); /* cfid null if open dir failed */ 2752 2753 rqst[0].rq_iov = vars->open_iov; 2754 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2755 2756 oparms = (struct cifs_open_parms) { 2757 .tcon = tcon, 2758 .path = path, 2759 .desired_access = desired_access, 2760 .disposition = FILE_OPEN, 2761 .create_options = cifs_create_options(cifs_sb, 0), 2762 .fid = &fid, 2763 .replay = !!(retries), 2764 }; 2765 2766 rc = SMB2_open_init(tcon, server, 2767 &rqst[0], &oplock, &oparms, utf16_path); 2768 if (rc) 2769 goto qic_exit; 2770 smb2_set_next_command(tcon, &rqst[0]); 2771 2772 rqst[1].rq_iov = &vars->qi_iov; 2773 rqst[1].rq_nvec = 1; 2774 2775 if (cfid) { 2776 rc = SMB2_query_info_init(tcon, server, 2777 &rqst[1], 2778 cfid->fid.persistent_fid, 2779 cfid->fid.volatile_fid, 2780 class, type, 0, 2781 output_len, 0, 2782 NULL); 2783 } else { 2784 rc = SMB2_query_info_init(tcon, server, 2785 &rqst[1], 2786 COMPOUND_FID, 2787 COMPOUND_FID, 2788 class, type, 0, 2789 output_len, 0, 2790 NULL); 2791 } 2792 if (rc) 2793 goto qic_exit; 2794 if (!cfid) { 2795 smb2_set_next_command(tcon, &rqst[1]); 2796 smb2_set_related(&rqst[1]); 2797 } 2798 2799 rqst[2].rq_iov = &vars->close_iov; 2800 rqst[2].rq_nvec = 1; 2801 2802 rc = SMB2_close_init(tcon, server, 2803 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2804 if (rc) 2805 goto qic_exit; 2806 smb2_set_related(&rqst[2]); 2807 2808 if (retries) { 2809 if (!cfid) { 2810 smb2_set_replay(server, &rqst[0]); 2811 smb2_set_replay(server, &rqst[2]); 2812 } 2813 smb2_set_replay(server, &rqst[1]); 2814 } 2815 2816 if (cfid) { 2817 rc = compound_send_recv(xid, ses, server, 2818 flags, 1, &rqst[1], 2819 &resp_buftype[1], &rsp_iov[1]); 2820 } else { 2821 rc = compound_send_recv(xid, ses, server, 2822 flags, 3, rqst, 2823 resp_buftype, rsp_iov); 2824 } 2825 if (rc) { 2826 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2827 if (rc == -EREMCHG) { 2828 tcon->need_reconnect = true; 2829 pr_warn_once("server share %s deleted\n", 2830 tcon->tree_name); 2831 } 2832 goto qic_exit; 2833 } 2834 *rsp = rsp_iov[1]; 2835 *buftype = resp_buftype[1]; 2836 2837 qic_exit: 2838 SMB2_open_free(&rqst[0]); 2839 SMB2_query_info_free(&rqst[1]); 2840 SMB2_close_free(&rqst[2]); 2841 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2842 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2843 if (cfid) 2844 close_cached_dir(cfid); 2845 kfree(vars); 2846 out_free_path: 2847 kfree(utf16_path); 2848 2849 if (is_replayable_error(rc) && 2850 smb2_should_replay(tcon, &retries, &cur_sleep)) 2851 goto replay_again; 2852 2853 return rc; 2854 } 2855 2856 static int 2857 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2858 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2859 { 2860 struct smb2_query_info_rsp *rsp; 2861 struct smb2_fs_full_size_info *info = NULL; 2862 struct kvec rsp_iov = {NULL, 0}; 2863 int buftype = CIFS_NO_BUFFER; 2864 int rc; 2865 2866 2867 rc = smb2_query_info_compound(xid, tcon, path, 2868 FILE_READ_ATTRIBUTES, 2869 FS_FULL_SIZE_INFORMATION, 2870 SMB2_O_INFO_FILESYSTEM, 2871 sizeof(struct smb2_fs_full_size_info), 2872 &rsp_iov, &buftype, cifs_sb); 2873 if (rc) 2874 goto qfs_exit; 2875 2876 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2877 buf->f_type = SMB2_SUPER_MAGIC; 2878 info = (struct smb2_fs_full_size_info *)( 2879 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2880 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2881 le32_to_cpu(rsp->OutputBufferLength), 2882 &rsp_iov, 2883 sizeof(struct smb2_fs_full_size_info)); 2884 if (!rc) 2885 smb2_copy_fs_info_to_kstatfs(info, buf); 2886 2887 qfs_exit: 2888 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2889 free_rsp_buf(buftype, rsp_iov.iov_base); 2890 return rc; 2891 } 2892 2893 static int 2894 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2895 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2896 { 2897 int rc; 2898 __le16 *utf16_path = NULL; 2899 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2900 struct cifs_open_parms oparms; 2901 struct cifs_fid fid; 2902 2903 if (!tcon->posix_extensions) 2904 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2905 2906 oparms = (struct cifs_open_parms) { 2907 .tcon = tcon, 2908 .path = path, 2909 .desired_access = FILE_READ_ATTRIBUTES, 2910 .disposition = FILE_OPEN, 2911 .create_options = cifs_create_options(cifs_sb, 0), 2912 .fid = &fid, 2913 }; 2914 2915 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2916 if (utf16_path == NULL) 2917 return -ENOMEM; 2918 2919 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 2920 NULL, NULL); 2921 kfree(utf16_path); 2922 if (rc) 2923 return rc; 2924 2925 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2926 fid.volatile_fid, buf); 2927 buf->f_type = SMB2_SUPER_MAGIC; 2928 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2929 return rc; 2930 } 2931 2932 static bool 2933 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2934 { 2935 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2936 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2937 } 2938 2939 static int 2940 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2941 __u64 length, __u32 type, int lock, int unlock, bool wait) 2942 { 2943 if (unlock && !lock) 2944 type = SMB2_LOCKFLAG_UNLOCK; 2945 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2946 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2947 current->tgid, length, offset, type, wait); 2948 } 2949 2950 static void 2951 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2952 { 2953 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2954 } 2955 2956 static void 2957 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2958 { 2959 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2960 } 2961 2962 static void 2963 smb2_new_lease_key(struct cifs_fid *fid) 2964 { 2965 generate_random_uuid(fid->lease_key); 2966 } 2967 2968 static int 2969 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2970 const char *search_name, 2971 struct dfs_info3_param **target_nodes, 2972 unsigned int *num_of_nodes, 2973 const struct nls_table *nls_codepage, int remap) 2974 { 2975 int rc; 2976 __le16 *utf16_path = NULL; 2977 int utf16_path_len = 0; 2978 struct cifs_tcon *tcon; 2979 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2980 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2981 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2982 int retry_once = 0; 2983 2984 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2985 2986 /* 2987 * Try to use the IPC tcon, otherwise just use any 2988 */ 2989 tcon = ses->tcon_ipc; 2990 if (tcon == NULL) { 2991 spin_lock(&cifs_tcp_ses_lock); 2992 tcon = list_first_entry_or_null(&ses->tcon_list, 2993 struct cifs_tcon, 2994 tcon_list); 2995 if (tcon) { 2996 tcon->tc_count++; 2997 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2998 netfs_trace_tcon_ref_get_dfs_refer); 2999 } 3000 spin_unlock(&cifs_tcp_ses_lock); 3001 } 3002 3003 if (tcon == NULL) { 3004 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 3005 ses); 3006 rc = -ENOTCONN; 3007 goto out; 3008 } 3009 3010 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 3011 &utf16_path_len, 3012 nls_codepage, remap); 3013 if (!utf16_path) { 3014 rc = -ENOMEM; 3015 goto out; 3016 } 3017 3018 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 3019 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 3020 if (!dfs_req) { 3021 rc = -ENOMEM; 3022 goto out; 3023 } 3024 3025 /* Highest DFS referral version understood */ 3026 dfs_req->MaxReferralLevel = DFS_VERSION; 3027 3028 /* Path to resolve in an UTF-16 null-terminated string */ 3029 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 3030 3031 for (;;) { 3032 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 3033 FSCTL_DFS_GET_REFERRALS, 3034 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 3035 (char **)&dfs_rsp, &dfs_rsp_size); 3036 if (fatal_signal_pending(current)) { 3037 rc = -EINTR; 3038 break; 3039 } 3040 if (!is_retryable_error(rc) || retry_once++) 3041 break; 3042 usleep_range(512, 2048); 3043 } 3044 3045 if (!rc && !dfs_rsp) 3046 rc = -EIO; 3047 if (rc) { 3048 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 3049 cifs_tcon_dbg(FYI, "%s: ioctl error: rc=%d\n", __func__, rc); 3050 goto out; 3051 } 3052 3053 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 3054 num_of_nodes, target_nodes, 3055 nls_codepage, remap, search_name, 3056 true /* is_unicode */); 3057 if (rc && rc != -ENOENT) { 3058 cifs_tcon_dbg(VFS, "%s: failed to parse DFS referral %s: %d\n", 3059 __func__, search_name, rc); 3060 } 3061 3062 out: 3063 if (tcon && !tcon->ipc) { 3064 /* ipc tcons are not refcounted */ 3065 spin_lock(&cifs_tcp_ses_lock); 3066 tcon->tc_count--; 3067 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3068 netfs_trace_tcon_ref_dec_dfs_refer); 3069 /* tc_count can never go negative */ 3070 WARN_ON(tcon->tc_count < 0); 3071 spin_unlock(&cifs_tcp_ses_lock); 3072 } 3073 kfree(utf16_path); 3074 kfree(dfs_req); 3075 kfree(dfs_rsp); 3076 return rc; 3077 } 3078 3079 static struct smb_ntsd * 3080 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3081 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3082 { 3083 struct smb_ntsd *pntsd = NULL; 3084 unsigned int xid; 3085 int rc = -EOPNOTSUPP; 3086 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3087 3088 if (IS_ERR(tlink)) 3089 return ERR_CAST(tlink); 3090 3091 xid = get_xid(); 3092 cifs_dbg(FYI, "trying to get acl\n"); 3093 3094 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3095 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3096 info); 3097 free_xid(xid); 3098 3099 cifs_put_tlink(tlink); 3100 3101 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3102 if (rc) 3103 return ERR_PTR(rc); 3104 return pntsd; 3105 3106 } 3107 3108 static struct smb_ntsd * 3109 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3110 const char *path, u32 *pacllen, u32 info) 3111 { 3112 struct smb_ntsd *pntsd = NULL; 3113 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3114 unsigned int xid; 3115 int rc; 3116 struct cifs_tcon *tcon; 3117 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3118 struct cifs_fid fid; 3119 struct cifs_open_parms oparms; 3120 __le16 *utf16_path; 3121 3122 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3123 if (IS_ERR(tlink)) 3124 return ERR_CAST(tlink); 3125 3126 tcon = tlink_tcon(tlink); 3127 xid = get_xid(); 3128 3129 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3130 if (!utf16_path) { 3131 rc = -ENOMEM; 3132 free_xid(xid); 3133 return ERR_PTR(rc); 3134 } 3135 3136 oparms = (struct cifs_open_parms) { 3137 .tcon = tcon, 3138 .path = path, 3139 .desired_access = READ_CONTROL, 3140 .disposition = FILE_OPEN, 3141 /* 3142 * When querying an ACL, even if the file is a symlink 3143 * we want to open the source not the target, and so 3144 * the protocol requires that the client specify this 3145 * flag when opening a reparse point 3146 */ 3147 .create_options = cifs_create_options(cifs_sb, 0) | 3148 OPEN_REPARSE_POINT, 3149 .fid = &fid, 3150 }; 3151 3152 if (info & SACL_SECINFO) 3153 oparms.desired_access |= SYSTEM_SECURITY; 3154 3155 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3156 NULL); 3157 kfree(utf16_path); 3158 if (!rc) { 3159 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3160 fid.volatile_fid, (void **)&pntsd, pacllen, 3161 info); 3162 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3163 } 3164 3165 cifs_put_tlink(tlink); 3166 free_xid(xid); 3167 3168 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3169 if (rc) 3170 return ERR_PTR(rc); 3171 return pntsd; 3172 } 3173 3174 static int 3175 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, 3176 struct inode *inode, const char *path, int aclflag) 3177 { 3178 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3179 unsigned int xid; 3180 int rc, access_flags = 0; 3181 struct cifs_tcon *tcon; 3182 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3183 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3184 struct cifs_fid fid; 3185 struct cifs_open_parms oparms; 3186 __le16 *utf16_path; 3187 3188 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3189 if (IS_ERR(tlink)) 3190 return PTR_ERR(tlink); 3191 3192 tcon = tlink_tcon(tlink); 3193 xid = get_xid(); 3194 3195 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3196 access_flags |= WRITE_OWNER; 3197 if (aclflag & CIFS_ACL_SACL) 3198 access_flags |= SYSTEM_SECURITY; 3199 if (aclflag & CIFS_ACL_DACL) 3200 access_flags |= WRITE_DAC; 3201 3202 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3203 if (!utf16_path) { 3204 rc = -ENOMEM; 3205 free_xid(xid); 3206 return rc; 3207 } 3208 3209 oparms = (struct cifs_open_parms) { 3210 .tcon = tcon, 3211 .desired_access = access_flags, 3212 .create_options = cifs_create_options(cifs_sb, 0), 3213 .disposition = FILE_OPEN, 3214 .path = path, 3215 .fid = &fid, 3216 }; 3217 3218 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3219 NULL, NULL); 3220 kfree(utf16_path); 3221 if (!rc) { 3222 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3223 fid.volatile_fid, pnntsd, acllen, aclflag); 3224 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3225 } 3226 3227 cifs_put_tlink(tlink); 3228 free_xid(xid); 3229 return rc; 3230 } 3231 3232 /* Retrieve an ACL from the server */ 3233 static struct smb_ntsd * 3234 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3235 struct inode *inode, const char *path, 3236 u32 *pacllen, u32 info) 3237 { 3238 struct smb_ntsd *pntsd = NULL; 3239 struct cifsFileInfo *open_file = NULL; 3240 3241 if (inode && !(info & SACL_SECINFO)) 3242 open_file = find_readable_file(CIFS_I(inode), true); 3243 if (!open_file || (info & SACL_SECINFO)) 3244 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3245 3246 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3247 cifsFileInfo_put(open_file); 3248 return pntsd; 3249 } 3250 3251 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3252 loff_t offset, loff_t len, unsigned int xid) 3253 { 3254 struct cifsFileInfo *cfile = file->private_data; 3255 struct file_zero_data_information fsctl_buf; 3256 3257 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3258 3259 fsctl_buf.FileOffset = cpu_to_le64(offset); 3260 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3261 3262 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3263 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3264 (char *)&fsctl_buf, 3265 sizeof(struct file_zero_data_information), 3266 0, NULL, NULL); 3267 } 3268 3269 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3270 unsigned long long offset, unsigned long long len, 3271 bool keep_size) 3272 { 3273 struct cifs_ses *ses = tcon->ses; 3274 struct inode *inode = file_inode(file); 3275 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3276 struct cifsFileInfo *cfile = file->private_data; 3277 struct netfs_inode *ictx = netfs_inode(inode); 3278 unsigned long long i_size, new_size, remote_size; 3279 long rc; 3280 unsigned int xid; 3281 3282 xid = get_xid(); 3283 3284 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3285 ses->Suid, offset, len); 3286 3287 inode_lock(inode); 3288 filemap_invalidate_lock(inode->i_mapping); 3289 3290 i_size = i_size_read(inode); 3291 remote_size = ictx->remote_i_size; 3292 if (offset + len >= remote_size && offset < i_size) { 3293 unsigned long long top = umin(offset + len, i_size); 3294 3295 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3296 if (rc < 0) 3297 goto zero_range_exit; 3298 } 3299 3300 /* 3301 * We zero the range through ioctl, so we need remove the page caches 3302 * first, otherwise the data may be inconsistent with the server. 3303 */ 3304 truncate_pagecache_range(inode, offset, offset + len - 1); 3305 3306 /* if file not oplocked can't be sure whether asking to extend size */ 3307 rc = -EOPNOTSUPP; 3308 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3309 goto zero_range_exit; 3310 3311 rc = smb3_zero_data(file, tcon, offset, len, xid); 3312 if (rc < 0) 3313 goto zero_range_exit; 3314 3315 /* 3316 * do we also need to change the size of the file? 3317 */ 3318 new_size = offset + len; 3319 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3320 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3321 cfile->fid.volatile_fid, cfile->pid, new_size); 3322 if (rc >= 0) { 3323 truncate_setsize(inode, new_size); 3324 netfs_resize_file(&cifsi->netfs, new_size, true); 3325 if (offset < cifsi->netfs.zero_point) 3326 cifsi->netfs.zero_point = offset; 3327 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3328 } 3329 } 3330 3331 zero_range_exit: 3332 filemap_invalidate_unlock(inode->i_mapping); 3333 inode_unlock(inode); 3334 free_xid(xid); 3335 if (rc) 3336 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3337 ses->Suid, offset, len, rc); 3338 else 3339 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3340 ses->Suid, offset, len); 3341 return rc; 3342 } 3343 3344 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3345 loff_t offset, loff_t len) 3346 { 3347 struct inode *inode = file_inode(file); 3348 struct cifsFileInfo *cfile = file->private_data; 3349 struct file_zero_data_information fsctl_buf; 3350 unsigned long long end = offset + len, i_size, remote_i_size; 3351 long rc; 3352 unsigned int xid; 3353 __u8 set_sparse = 1; 3354 3355 xid = get_xid(); 3356 3357 inode_lock(inode); 3358 /* Need to make file sparse, if not already, before freeing range. */ 3359 /* Consider adding equivalent for compressed since it could also work */ 3360 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3361 rc = -EOPNOTSUPP; 3362 goto out; 3363 } 3364 3365 filemap_invalidate_lock(inode->i_mapping); 3366 /* 3367 * We implement the punch hole through ioctl, so we need remove the page 3368 * caches first, otherwise the data may be inconsistent with the server. 3369 */ 3370 truncate_pagecache_range(inode, offset, offset + len - 1); 3371 3372 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3373 3374 fsctl_buf.FileOffset = cpu_to_le64(offset); 3375 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3376 3377 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3378 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3379 (char *)&fsctl_buf, 3380 sizeof(struct file_zero_data_information), 3381 CIFSMaxBufSize, NULL, NULL); 3382 3383 if (rc) 3384 goto unlock; 3385 3386 /* If there's dirty data in the buffer that would extend the EOF if it 3387 * were written, then we need to move the EOF marker over to the lower 3388 * of the high end of the hole and the proposed EOF. The problem is 3389 * that we locally hole-punch the tail of the dirty data, the proposed 3390 * EOF update will end up in the wrong place. 3391 */ 3392 i_size = i_size_read(inode); 3393 remote_i_size = netfs_inode(inode)->remote_i_size; 3394 if (end > remote_i_size && i_size > remote_i_size) { 3395 unsigned long long extend_to = umin(end, i_size); 3396 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3397 cfile->fid.volatile_fid, cfile->pid, extend_to); 3398 if (rc >= 0) 3399 netfs_inode(inode)->remote_i_size = extend_to; 3400 } 3401 3402 unlock: 3403 filemap_invalidate_unlock(inode->i_mapping); 3404 out: 3405 inode_unlock(inode); 3406 free_xid(xid); 3407 return rc; 3408 } 3409 3410 static int smb3_simple_fallocate_write_range(unsigned int xid, 3411 struct cifs_tcon *tcon, 3412 struct cifsFileInfo *cfile, 3413 loff_t off, loff_t len, 3414 char *buf) 3415 { 3416 struct cifs_io_parms io_parms = {0}; 3417 int nbytes; 3418 int rc = 0; 3419 struct kvec iov[2]; 3420 3421 io_parms.netfid = cfile->fid.netfid; 3422 io_parms.pid = current->tgid; 3423 io_parms.tcon = tcon; 3424 io_parms.persistent_fid = cfile->fid.persistent_fid; 3425 io_parms.volatile_fid = cfile->fid.volatile_fid; 3426 3427 while (len) { 3428 io_parms.offset = off; 3429 io_parms.length = len; 3430 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3431 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3432 /* iov[0] is reserved for smb header */ 3433 iov[1].iov_base = buf; 3434 iov[1].iov_len = io_parms.length; 3435 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3436 if (rc) 3437 break; 3438 if (nbytes > len) 3439 return -EINVAL; 3440 buf += nbytes; 3441 off += nbytes; 3442 len -= nbytes; 3443 } 3444 return rc; 3445 } 3446 3447 static int smb3_simple_fallocate_range(unsigned int xid, 3448 struct cifs_tcon *tcon, 3449 struct cifsFileInfo *cfile, 3450 loff_t off, loff_t len) 3451 { 3452 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3453 u32 out_data_len; 3454 char *buf = NULL; 3455 loff_t l; 3456 int rc; 3457 3458 in_data.file_offset = cpu_to_le64(off); 3459 in_data.length = cpu_to_le64(len); 3460 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3461 cfile->fid.volatile_fid, 3462 FSCTL_QUERY_ALLOCATED_RANGES, 3463 (char *)&in_data, sizeof(in_data), 3464 1024 * sizeof(struct file_allocated_range_buffer), 3465 (char **)&out_data, &out_data_len); 3466 if (rc) 3467 goto out; 3468 3469 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3470 if (buf == NULL) { 3471 rc = -ENOMEM; 3472 goto out; 3473 } 3474 3475 tmp_data = out_data; 3476 while (len) { 3477 /* 3478 * The rest of the region is unmapped so write it all. 3479 */ 3480 if (out_data_len == 0) { 3481 rc = smb3_simple_fallocate_write_range(xid, tcon, 3482 cfile, off, len, buf); 3483 goto out; 3484 } 3485 3486 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3487 rc = -EINVAL; 3488 goto out; 3489 } 3490 3491 if (off < le64_to_cpu(tmp_data->file_offset)) { 3492 /* 3493 * We are at a hole. Write until the end of the region 3494 * or until the next allocated data, 3495 * whichever comes next. 3496 */ 3497 l = le64_to_cpu(tmp_data->file_offset) - off; 3498 if (len < l) 3499 l = len; 3500 rc = smb3_simple_fallocate_write_range(xid, tcon, 3501 cfile, off, l, buf); 3502 if (rc) 3503 goto out; 3504 off = off + l; 3505 len = len - l; 3506 if (len == 0) 3507 goto out; 3508 } 3509 /* 3510 * We are at a section of allocated data, just skip forward 3511 * until the end of the data or the end of the region 3512 * we are supposed to fallocate, whichever comes first. 3513 */ 3514 l = le64_to_cpu(tmp_data->length); 3515 if (len < l) 3516 l = len; 3517 off += l; 3518 len -= l; 3519 3520 tmp_data = &tmp_data[1]; 3521 out_data_len -= sizeof(struct file_allocated_range_buffer); 3522 } 3523 3524 out: 3525 kfree(out_data); 3526 kfree(buf); 3527 return rc; 3528 } 3529 3530 3531 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3532 loff_t off, loff_t len, bool keep_size) 3533 { 3534 struct inode *inode; 3535 struct cifsInodeInfo *cifsi; 3536 struct cifsFileInfo *cfile = file->private_data; 3537 long rc = -EOPNOTSUPP; 3538 unsigned int xid; 3539 loff_t new_eof; 3540 3541 xid = get_xid(); 3542 3543 inode = d_inode(cfile->dentry); 3544 cifsi = CIFS_I(inode); 3545 3546 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3547 tcon->ses->Suid, off, len); 3548 /* if file not oplocked can't be sure whether asking to extend size */ 3549 if (!CIFS_CACHE_READ(cifsi)) 3550 if (keep_size == false) { 3551 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3552 tcon->tid, tcon->ses->Suid, off, len, rc); 3553 free_xid(xid); 3554 return rc; 3555 } 3556 3557 /* 3558 * Extending the file 3559 */ 3560 if ((keep_size == false) && i_size_read(inode) < off + len) { 3561 rc = inode_newsize_ok(inode, off + len); 3562 if (rc) 3563 goto out; 3564 3565 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3566 smb2_set_sparse(xid, tcon, cfile, inode, false); 3567 3568 new_eof = off + len; 3569 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3570 cfile->fid.volatile_fid, cfile->pid, new_eof); 3571 if (rc == 0) { 3572 netfs_resize_file(&cifsi->netfs, new_eof, true); 3573 cifs_setsize(inode, new_eof); 3574 } 3575 goto out; 3576 } 3577 3578 /* 3579 * Files are non-sparse by default so falloc may be a no-op 3580 * Must check if file sparse. If not sparse, and since we are not 3581 * extending then no need to do anything since file already allocated 3582 */ 3583 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3584 rc = 0; 3585 goto out; 3586 } 3587 3588 if (keep_size == true) { 3589 /* 3590 * We can not preallocate pages beyond the end of the file 3591 * in SMB2 3592 */ 3593 if (off >= i_size_read(inode)) { 3594 rc = 0; 3595 goto out; 3596 } 3597 /* 3598 * For fallocates that are partially beyond the end of file, 3599 * clamp len so we only fallocate up to the end of file. 3600 */ 3601 if (off + len > i_size_read(inode)) { 3602 len = i_size_read(inode) - off; 3603 } 3604 } 3605 3606 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3607 /* 3608 * At this point, we are trying to fallocate an internal 3609 * regions of a sparse file. Since smb2 does not have a 3610 * fallocate command we have two options on how to emulate this. 3611 * We can either turn the entire file to become non-sparse 3612 * which we only do if the fallocate is for virtually 3613 * the whole file, or we can overwrite the region with zeroes 3614 * using SMB2_write, which could be prohibitevly expensive 3615 * if len is large. 3616 */ 3617 /* 3618 * We are only trying to fallocate a small region so 3619 * just write it with zero. 3620 */ 3621 if (len <= 1024 * 1024) { 3622 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3623 off, len); 3624 goto out; 3625 } 3626 3627 /* 3628 * Check if falloc starts within first few pages of file 3629 * and ends within a few pages of the end of file to 3630 * ensure that most of file is being forced to be 3631 * fallocated now. If so then setting whole file sparse 3632 * ie potentially making a few extra pages at the beginning 3633 * or end of the file non-sparse via set_sparse is harmless. 3634 */ 3635 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3636 rc = -EOPNOTSUPP; 3637 goto out; 3638 } 3639 } 3640 3641 smb2_set_sparse(xid, tcon, cfile, inode, false); 3642 rc = 0; 3643 3644 out: 3645 if (rc) 3646 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3647 tcon->ses->Suid, off, len, rc); 3648 else 3649 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3650 tcon->ses->Suid, off, len); 3651 3652 free_xid(xid); 3653 return rc; 3654 } 3655 3656 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3657 loff_t off, loff_t len) 3658 { 3659 int rc; 3660 unsigned int xid; 3661 struct inode *inode = file_inode(file); 3662 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3663 struct cifsFileInfo *cfile = file->private_data; 3664 struct netfs_inode *ictx = &cifsi->netfs; 3665 loff_t old_eof, new_eof; 3666 3667 xid = get_xid(); 3668 3669 inode_lock(inode); 3670 3671 old_eof = i_size_read(inode); 3672 if ((off >= old_eof) || 3673 off + len >= old_eof) { 3674 rc = -EINVAL; 3675 goto out; 3676 } 3677 3678 filemap_invalidate_lock(inode->i_mapping); 3679 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3680 if (rc < 0) 3681 goto out_2; 3682 3683 truncate_pagecache_range(inode, off, old_eof); 3684 ictx->zero_point = old_eof; 3685 3686 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3687 old_eof - off - len, off); 3688 if (rc < 0) 3689 goto out_2; 3690 3691 new_eof = old_eof - len; 3692 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3693 cfile->fid.volatile_fid, cfile->pid, new_eof); 3694 if (rc < 0) 3695 goto out_2; 3696 3697 rc = 0; 3698 3699 truncate_setsize(inode, new_eof); 3700 netfs_resize_file(&cifsi->netfs, new_eof, true); 3701 ictx->zero_point = new_eof; 3702 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3703 out_2: 3704 filemap_invalidate_unlock(inode->i_mapping); 3705 out: 3706 inode_unlock(inode); 3707 free_xid(xid); 3708 return rc; 3709 } 3710 3711 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3712 loff_t off, loff_t len) 3713 { 3714 int rc; 3715 unsigned int xid; 3716 struct cifsFileInfo *cfile = file->private_data; 3717 struct inode *inode = file_inode(file); 3718 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3719 __u64 count, old_eof, new_eof; 3720 3721 xid = get_xid(); 3722 3723 inode_lock(inode); 3724 3725 old_eof = i_size_read(inode); 3726 if (off >= old_eof) { 3727 rc = -EINVAL; 3728 goto out; 3729 } 3730 3731 count = old_eof - off; 3732 new_eof = old_eof + len; 3733 3734 filemap_invalidate_lock(inode->i_mapping); 3735 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3736 if (rc < 0) 3737 goto out_2; 3738 truncate_pagecache_range(inode, off, old_eof); 3739 3740 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3741 cfile->fid.volatile_fid, cfile->pid, new_eof); 3742 if (rc < 0) 3743 goto out_2; 3744 3745 truncate_setsize(inode, new_eof); 3746 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3747 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3748 3749 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3750 if (rc < 0) 3751 goto out_2; 3752 cifsi->netfs.zero_point = new_eof; 3753 3754 rc = smb3_zero_data(file, tcon, off, len, xid); 3755 if (rc < 0) 3756 goto out_2; 3757 3758 rc = 0; 3759 out_2: 3760 filemap_invalidate_unlock(inode->i_mapping); 3761 out: 3762 inode_unlock(inode); 3763 free_xid(xid); 3764 return rc; 3765 } 3766 3767 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3768 { 3769 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3770 struct cifsInodeInfo *cifsi; 3771 struct inode *inode; 3772 int rc = 0; 3773 struct file_allocated_range_buffer in_data, *out_data = NULL; 3774 u32 out_data_len; 3775 unsigned int xid; 3776 3777 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3778 return generic_file_llseek(file, offset, whence); 3779 3780 inode = d_inode(cfile->dentry); 3781 cifsi = CIFS_I(inode); 3782 3783 if (offset < 0 || offset >= i_size_read(inode)) 3784 return -ENXIO; 3785 3786 xid = get_xid(); 3787 /* 3788 * We need to be sure that all dirty pages are written as they 3789 * might fill holes on the server. 3790 * Note that we also MUST flush any written pages since at least 3791 * some servers (Windows2016) will not reflect recent writes in 3792 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3793 */ 3794 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3795 if (wrcfile) { 3796 filemap_write_and_wait(inode->i_mapping); 3797 smb2_flush_file(xid, tcon, &wrcfile->fid); 3798 cifsFileInfo_put(wrcfile); 3799 } 3800 3801 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3802 if (whence == SEEK_HOLE) 3803 offset = i_size_read(inode); 3804 goto lseek_exit; 3805 } 3806 3807 in_data.file_offset = cpu_to_le64(offset); 3808 in_data.length = cpu_to_le64(i_size_read(inode)); 3809 3810 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3811 cfile->fid.volatile_fid, 3812 FSCTL_QUERY_ALLOCATED_RANGES, 3813 (char *)&in_data, sizeof(in_data), 3814 sizeof(struct file_allocated_range_buffer), 3815 (char **)&out_data, &out_data_len); 3816 if (rc == -E2BIG) 3817 rc = 0; 3818 if (rc) 3819 goto lseek_exit; 3820 3821 if (whence == SEEK_HOLE && out_data_len == 0) 3822 goto lseek_exit; 3823 3824 if (whence == SEEK_DATA && out_data_len == 0) { 3825 rc = -ENXIO; 3826 goto lseek_exit; 3827 } 3828 3829 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3830 rc = -EINVAL; 3831 goto lseek_exit; 3832 } 3833 if (whence == SEEK_DATA) { 3834 offset = le64_to_cpu(out_data->file_offset); 3835 goto lseek_exit; 3836 } 3837 if (offset < le64_to_cpu(out_data->file_offset)) 3838 goto lseek_exit; 3839 3840 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3841 3842 lseek_exit: 3843 free_xid(xid); 3844 kfree(out_data); 3845 if (!rc) 3846 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3847 else 3848 return rc; 3849 } 3850 3851 static int smb3_fiemap(struct cifs_tcon *tcon, 3852 struct cifsFileInfo *cfile, 3853 struct fiemap_extent_info *fei, u64 start, u64 len) 3854 { 3855 unsigned int xid; 3856 struct file_allocated_range_buffer in_data, *out_data; 3857 u32 out_data_len; 3858 int i, num, rc, flags, last_blob; 3859 u64 next; 3860 3861 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3862 if (rc) 3863 return rc; 3864 3865 xid = get_xid(); 3866 again: 3867 in_data.file_offset = cpu_to_le64(start); 3868 in_data.length = cpu_to_le64(len); 3869 3870 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3871 cfile->fid.volatile_fid, 3872 FSCTL_QUERY_ALLOCATED_RANGES, 3873 (char *)&in_data, sizeof(in_data), 3874 1024 * sizeof(struct file_allocated_range_buffer), 3875 (char **)&out_data, &out_data_len); 3876 if (rc == -E2BIG) { 3877 last_blob = 0; 3878 rc = 0; 3879 } else 3880 last_blob = 1; 3881 if (rc) 3882 goto out; 3883 3884 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3885 rc = -EINVAL; 3886 goto out; 3887 } 3888 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3889 rc = -EINVAL; 3890 goto out; 3891 } 3892 3893 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3894 for (i = 0; i < num; i++) { 3895 flags = 0; 3896 if (i == num - 1 && last_blob) 3897 flags |= FIEMAP_EXTENT_LAST; 3898 3899 rc = fiemap_fill_next_extent(fei, 3900 le64_to_cpu(out_data[i].file_offset), 3901 le64_to_cpu(out_data[i].file_offset), 3902 le64_to_cpu(out_data[i].length), 3903 flags); 3904 if (rc < 0) 3905 goto out; 3906 if (rc == 1) { 3907 rc = 0; 3908 goto out; 3909 } 3910 } 3911 3912 if (!last_blob) { 3913 next = le64_to_cpu(out_data[num - 1].file_offset) + 3914 le64_to_cpu(out_data[num - 1].length); 3915 len = len - (next - start); 3916 start = next; 3917 goto again; 3918 } 3919 3920 out: 3921 free_xid(xid); 3922 kfree(out_data); 3923 return rc; 3924 } 3925 3926 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3927 loff_t off, loff_t len) 3928 { 3929 /* KEEP_SIZE already checked for by do_fallocate */ 3930 if (mode & FALLOC_FL_PUNCH_HOLE) 3931 return smb3_punch_hole(file, tcon, off, len); 3932 else if (mode & FALLOC_FL_ZERO_RANGE) { 3933 if (mode & FALLOC_FL_KEEP_SIZE) 3934 return smb3_zero_range(file, tcon, off, len, true); 3935 return smb3_zero_range(file, tcon, off, len, false); 3936 } else if (mode == FALLOC_FL_KEEP_SIZE) 3937 return smb3_simple_falloc(file, tcon, off, len, true); 3938 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3939 return smb3_collapse_range(file, tcon, off, len); 3940 else if (mode == FALLOC_FL_INSERT_RANGE) 3941 return smb3_insert_range(file, tcon, off, len); 3942 else if (mode == 0) 3943 return smb3_simple_falloc(file, tcon, off, len, false); 3944 3945 return -EOPNOTSUPP; 3946 } 3947 3948 static void 3949 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3950 struct cifsInodeInfo *cinode, __u32 oplock, 3951 __u16 epoch, bool *purge_cache) 3952 { 3953 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3954 } 3955 3956 static void 3957 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3958 __u16 epoch, bool *purge_cache); 3959 3960 static void 3961 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3962 struct cifsInodeInfo *cinode, __u32 oplock, 3963 __u16 epoch, bool *purge_cache) 3964 { 3965 unsigned int old_state = cinode->oplock; 3966 __u16 old_epoch = cinode->epoch; 3967 unsigned int new_state; 3968 3969 if (epoch > old_epoch) { 3970 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3971 cinode->epoch = epoch; 3972 } 3973 3974 new_state = cinode->oplock; 3975 *purge_cache = false; 3976 3977 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3978 (new_state & CIFS_CACHE_READ_FLG) == 0) 3979 *purge_cache = true; 3980 else if (old_state == new_state && (epoch - old_epoch > 1)) 3981 *purge_cache = true; 3982 } 3983 3984 static void 3985 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3986 __u16 epoch, bool *purge_cache) 3987 { 3988 oplock &= 0xFF; 3989 cinode->lease_granted = false; 3990 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3991 return; 3992 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3993 cinode->oplock = CIFS_CACHE_RHW_FLG; 3994 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3995 &cinode->netfs.inode); 3996 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3997 cinode->oplock = CIFS_CACHE_RW_FLG; 3998 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3999 &cinode->netfs.inode); 4000 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 4001 cinode->oplock = CIFS_CACHE_READ_FLG; 4002 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 4003 &cinode->netfs.inode); 4004 } else 4005 cinode->oplock = 0; 4006 } 4007 4008 static void 4009 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4010 __u16 epoch, bool *purge_cache) 4011 { 4012 char message[5] = {0}; 4013 unsigned int new_oplock = 0; 4014 4015 oplock &= 0xFF; 4016 cinode->lease_granted = true; 4017 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4018 return; 4019 4020 /* Check if the server granted an oplock rather than a lease */ 4021 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4022 return smb2_set_oplock_level(cinode, oplock, epoch, 4023 purge_cache); 4024 4025 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4026 new_oplock |= CIFS_CACHE_READ_FLG; 4027 strcat(message, "R"); 4028 } 4029 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4030 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4031 strcat(message, "H"); 4032 } 4033 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4034 new_oplock |= CIFS_CACHE_WRITE_FLG; 4035 strcat(message, "W"); 4036 } 4037 if (!new_oplock) 4038 strscpy(message, "None"); 4039 4040 cinode->oplock = new_oplock; 4041 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4042 &cinode->netfs.inode); 4043 } 4044 4045 static void 4046 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4047 __u16 epoch, bool *purge_cache) 4048 { 4049 unsigned int old_oplock = cinode->oplock; 4050 4051 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4052 4053 if (purge_cache) { 4054 *purge_cache = false; 4055 if (old_oplock == CIFS_CACHE_READ_FLG) { 4056 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4057 (epoch - cinode->epoch > 0)) 4058 *purge_cache = true; 4059 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4060 (epoch - cinode->epoch > 1)) 4061 *purge_cache = true; 4062 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4063 (epoch - cinode->epoch > 1)) 4064 *purge_cache = true; 4065 else if (cinode->oplock == 0 && 4066 (epoch - cinode->epoch > 0)) 4067 *purge_cache = true; 4068 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4069 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4070 (epoch - cinode->epoch > 0)) 4071 *purge_cache = true; 4072 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4073 (epoch - cinode->epoch > 1)) 4074 *purge_cache = true; 4075 } 4076 cinode->epoch = epoch; 4077 } 4078 } 4079 4080 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4081 static bool 4082 smb2_is_read_op(__u32 oplock) 4083 { 4084 return oplock == SMB2_OPLOCK_LEVEL_II; 4085 } 4086 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4087 4088 static bool 4089 smb21_is_read_op(__u32 oplock) 4090 { 4091 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4092 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4093 } 4094 4095 static __le32 4096 map_oplock_to_lease(u8 oplock) 4097 { 4098 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4099 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4100 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4101 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4102 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4103 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4104 SMB2_LEASE_WRITE_CACHING_LE; 4105 return 0; 4106 } 4107 4108 static char * 4109 smb2_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4110 { 4111 struct create_lease *buf; 4112 4113 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4114 if (!buf) 4115 return NULL; 4116 4117 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4118 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4119 4120 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4121 (struct create_lease, lcontext)); 4122 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4123 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4124 (struct create_lease, Name)); 4125 buf->ccontext.NameLength = cpu_to_le16(4); 4126 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4127 buf->Name[0] = 'R'; 4128 buf->Name[1] = 'q'; 4129 buf->Name[2] = 'L'; 4130 buf->Name[3] = 's'; 4131 return (char *)buf; 4132 } 4133 4134 static char * 4135 smb3_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4136 { 4137 struct create_lease_v2 *buf; 4138 4139 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4140 if (!buf) 4141 return NULL; 4142 4143 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4144 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4145 buf->lcontext.LeaseFlags = flags; 4146 if (flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 4147 memcpy(&buf->lcontext.ParentLeaseKey, parent_lease_key, SMB2_LEASE_KEY_SIZE); 4148 4149 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4150 (struct create_lease_v2, lcontext)); 4151 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4152 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4153 (struct create_lease_v2, Name)); 4154 buf->ccontext.NameLength = cpu_to_le16(4); 4155 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4156 buf->Name[0] = 'R'; 4157 buf->Name[1] = 'q'; 4158 buf->Name[2] = 'L'; 4159 buf->Name[3] = 's'; 4160 return (char *)buf; 4161 } 4162 4163 static __u8 4164 smb2_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4165 { 4166 struct create_lease *lc = (struct create_lease *)buf; 4167 4168 *epoch = 0; /* not used */ 4169 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4170 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4171 return le32_to_cpu(lc->lcontext.LeaseState); 4172 } 4173 4174 static __u8 4175 smb3_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4176 { 4177 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4178 4179 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4180 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4181 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4182 if (lease_key) 4183 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4184 return le32_to_cpu(lc->lcontext.LeaseState); 4185 } 4186 4187 static unsigned int 4188 smb2_wp_retry_size(struct inode *inode) 4189 { 4190 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4191 SMB2_MAX_BUFFER_SIZE); 4192 } 4193 4194 static bool 4195 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4196 { 4197 return !cfile->invalidHandle; 4198 } 4199 4200 static void 4201 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4202 struct smb_rqst *old_rq, __le16 cipher_type) 4203 { 4204 struct smb2_hdr *shdr = 4205 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4206 4207 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4208 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4209 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4210 tr_hdr->Flags = cpu_to_le16(0x01); 4211 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4212 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4213 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4214 else 4215 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4216 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4217 } 4218 4219 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4220 int num_rqst, const u8 *sig, u8 **iv, 4221 struct aead_request **req, struct sg_table *sgt, 4222 unsigned int *num_sgs, size_t *sensitive_size) 4223 { 4224 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4225 unsigned int iv_size = crypto_aead_ivsize(tfm); 4226 unsigned int len; 4227 u8 *p; 4228 4229 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4230 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4231 return ERR_PTR(*num_sgs); 4232 4233 len = iv_size; 4234 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4235 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4236 len += req_size; 4237 len = ALIGN(len, __alignof__(struct scatterlist)); 4238 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4239 *sensitive_size = len; 4240 4241 p = kvzalloc(len, GFP_NOFS); 4242 if (!p) 4243 return ERR_PTR(-ENOMEM); 4244 4245 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4246 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4247 crypto_tfm_ctx_alignment()); 4248 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4249 __alignof__(struct scatterlist)); 4250 return p; 4251 } 4252 4253 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4254 int num_rqst, const u8 *sig, u8 **iv, 4255 struct aead_request **req, struct scatterlist **sgl, 4256 size_t *sensitive_size) 4257 { 4258 struct sg_table sgtable = {}; 4259 unsigned int skip, num_sgs, i, j; 4260 ssize_t rc; 4261 void *p; 4262 4263 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4264 &num_sgs, sensitive_size); 4265 if (IS_ERR(p)) 4266 return ERR_CAST(p); 4267 4268 sg_init_marker(sgtable.sgl, num_sgs); 4269 4270 /* 4271 * The first rqst has a transform header where the 4272 * first 20 bytes are not part of the encrypted blob. 4273 */ 4274 skip = 20; 4275 4276 for (i = 0; i < num_rqst; i++) { 4277 struct iov_iter *iter = &rqst[i].rq_iter; 4278 size_t count = iov_iter_count(iter); 4279 4280 for (j = 0; j < rqst[i].rq_nvec; j++) { 4281 cifs_sg_set_buf(&sgtable, 4282 rqst[i].rq_iov[j].iov_base + skip, 4283 rqst[i].rq_iov[j].iov_len - skip); 4284 4285 /* See the above comment on the 'skip' assignment */ 4286 skip = 0; 4287 } 4288 sgtable.orig_nents = sgtable.nents; 4289 4290 rc = extract_iter_to_sg(iter, count, &sgtable, 4291 num_sgs - sgtable.nents, 0); 4292 iov_iter_revert(iter, rc); 4293 sgtable.orig_nents = sgtable.nents; 4294 } 4295 4296 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4297 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4298 *sgl = sgtable.sgl; 4299 return p; 4300 } 4301 4302 static int 4303 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4304 { 4305 struct TCP_Server_Info *pserver; 4306 struct cifs_ses *ses; 4307 u8 *ses_enc_key; 4308 4309 /* If server is a channel, select the primary channel */ 4310 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4311 4312 spin_lock(&cifs_tcp_ses_lock); 4313 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4314 if (ses->Suid == ses_id) { 4315 spin_lock(&ses->ses_lock); 4316 ses_enc_key = enc ? ses->smb3encryptionkey : 4317 ses->smb3decryptionkey; 4318 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4319 spin_unlock(&ses->ses_lock); 4320 spin_unlock(&cifs_tcp_ses_lock); 4321 return 0; 4322 } 4323 } 4324 spin_unlock(&cifs_tcp_ses_lock); 4325 4326 trace_smb3_ses_not_found(ses_id); 4327 4328 return -EAGAIN; 4329 } 4330 /* 4331 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4332 * iov[0] - transform header (associate data), 4333 * iov[1-N] - SMB2 header and pages - data to encrypt. 4334 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4335 * untouched. 4336 */ 4337 static int 4338 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4339 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4340 { 4341 struct smb2_transform_hdr *tr_hdr = 4342 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4343 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4344 int rc = 0; 4345 struct scatterlist *sg; 4346 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4347 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4348 struct aead_request *req; 4349 u8 *iv; 4350 DECLARE_CRYPTO_WAIT(wait); 4351 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4352 void *creq; 4353 size_t sensitive_size; 4354 4355 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4356 if (rc) { 4357 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4358 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4359 return rc; 4360 } 4361 4362 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4363 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4364 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4365 else 4366 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4367 4368 if (rc) { 4369 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4370 return rc; 4371 } 4372 4373 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4374 if (rc) { 4375 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4376 return rc; 4377 } 4378 4379 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4380 &sensitive_size); 4381 if (IS_ERR(creq)) 4382 return PTR_ERR(creq); 4383 4384 if (!enc) { 4385 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4386 crypt_len += SMB2_SIGNATURE_SIZE; 4387 } 4388 4389 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4390 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4391 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4392 else { 4393 iv[0] = 3; 4394 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4395 } 4396 4397 aead_request_set_tfm(req, tfm); 4398 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4399 aead_request_set_ad(req, assoc_data_len); 4400 4401 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4402 crypto_req_done, &wait); 4403 4404 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4405 : crypto_aead_decrypt(req), &wait); 4406 4407 if (!rc && enc) 4408 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4409 4410 kvfree_sensitive(creq, sensitive_size); 4411 return rc; 4412 } 4413 4414 /* 4415 * Clear a read buffer, discarding the folios which have the 1st mark set. 4416 */ 4417 static void cifs_clear_folioq_buffer(struct folio_queue *buffer) 4418 { 4419 struct folio_queue *folioq; 4420 4421 while ((folioq = buffer)) { 4422 for (int s = 0; s < folioq_count(folioq); s++) 4423 if (folioq_is_marked(folioq, s)) 4424 folio_put(folioq_folio(folioq, s)); 4425 buffer = folioq->next; 4426 kfree(folioq); 4427 } 4428 } 4429 4430 /* 4431 * Allocate buffer space into a folio queue. 4432 */ 4433 static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size) 4434 { 4435 struct folio_queue *buffer = NULL, *tail = NULL, *p; 4436 struct folio *folio; 4437 unsigned int slot; 4438 4439 do { 4440 if (!tail || folioq_full(tail)) { 4441 p = kmalloc(sizeof(*p), GFP_NOFS); 4442 if (!p) 4443 goto nomem; 4444 folioq_init(p, 0); 4445 if (tail) { 4446 tail->next = p; 4447 p->prev = tail; 4448 } else { 4449 buffer = p; 4450 } 4451 tail = p; 4452 } 4453 4454 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0); 4455 if (!folio) 4456 goto nomem; 4457 4458 slot = folioq_append_mark(tail, folio); 4459 size -= folioq_folio_size(tail, slot); 4460 } while (size > 0); 4461 4462 return buffer; 4463 4464 nomem: 4465 cifs_clear_folioq_buffer(buffer); 4466 return NULL; 4467 } 4468 4469 /* 4470 * Copy data from an iterator to the folios in a folio queue buffer. 4471 */ 4472 static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size, 4473 struct folio_queue *buffer) 4474 { 4475 for (; buffer; buffer = buffer->next) { 4476 for (int s = 0; s < folioq_count(buffer); s++) { 4477 struct folio *folio = folioq_folio(buffer, s); 4478 size_t part = folioq_folio_size(buffer, s); 4479 4480 part = umin(part, size); 4481 4482 if (copy_folio_from_iter(folio, 0, part, iter) != part) 4483 return false; 4484 size -= part; 4485 } 4486 } 4487 return true; 4488 } 4489 4490 void 4491 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4492 { 4493 for (int i = 0; i < num_rqst; i++) 4494 cifs_clear_folioq_buffer(rqst[i].rq_buffer); 4495 } 4496 4497 /* 4498 * This function will initialize new_rq and encrypt the content. 4499 * The first entry, new_rq[0], only contains a single iov which contains 4500 * a smb2_transform_hdr and is pre-allocated by the caller. 4501 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4502 * 4503 * The end result is an array of smb_rqst structures where the first structure 4504 * only contains a single iov for the transform header which we then can pass 4505 * to crypt_message(). 4506 * 4507 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4508 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4509 */ 4510 static int 4511 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4512 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4513 { 4514 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4515 unsigned int orig_len = 0; 4516 int rc = -ENOMEM; 4517 4518 for (int i = 1; i < num_rqst; i++) { 4519 struct smb_rqst *old = &old_rq[i - 1]; 4520 struct smb_rqst *new = &new_rq[i]; 4521 struct folio_queue *buffer = NULL; 4522 size_t size = iov_iter_count(&old->rq_iter); 4523 4524 orig_len += smb_rqst_len(server, old); 4525 new->rq_iov = old->rq_iov; 4526 new->rq_nvec = old->rq_nvec; 4527 4528 if (size > 0) { 4529 buffer = cifs_alloc_folioq_buffer(size); 4530 if (!buffer) 4531 goto err_free; 4532 4533 new->rq_buffer = buffer; 4534 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE, 4535 buffer, 0, 0, size); 4536 4537 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) { 4538 rc = -EIO; 4539 goto err_free; 4540 } 4541 } 4542 } 4543 4544 /* fill the 1st iov with a transform header */ 4545 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4546 4547 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4548 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4549 if (rc) 4550 goto err_free; 4551 4552 return rc; 4553 4554 err_free: 4555 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4556 return rc; 4557 } 4558 4559 static int 4560 smb3_is_transform_hdr(void *buf) 4561 { 4562 struct smb2_transform_hdr *trhdr = buf; 4563 4564 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4565 } 4566 4567 static int 4568 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4569 unsigned int buf_data_size, struct iov_iter *iter, 4570 bool is_offloaded) 4571 { 4572 struct crypto_aead *tfm; 4573 struct smb_rqst rqst = {NULL}; 4574 struct kvec iov[2]; 4575 size_t iter_size = 0; 4576 int rc; 4577 4578 iov[0].iov_base = buf; 4579 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4580 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4581 iov[1].iov_len = buf_data_size; 4582 4583 rqst.rq_iov = iov; 4584 rqst.rq_nvec = 2; 4585 if (iter) { 4586 rqst.rq_iter = *iter; 4587 iter_size = iov_iter_count(iter); 4588 } 4589 4590 if (is_offloaded) { 4591 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4592 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4593 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4594 else 4595 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4596 if (IS_ERR(tfm)) { 4597 rc = PTR_ERR(tfm); 4598 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4599 4600 return rc; 4601 } 4602 } else { 4603 rc = smb3_crypto_aead_allocate(server); 4604 if (unlikely(rc)) 4605 return rc; 4606 tfm = server->secmech.dec; 4607 } 4608 4609 rc = crypt_message(server, 1, &rqst, 0, tfm); 4610 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4611 4612 if (is_offloaded) 4613 crypto_free_aead(tfm); 4614 4615 if (rc) 4616 return rc; 4617 4618 memmove(buf, iov[1].iov_base, buf_data_size); 4619 4620 if (!is_offloaded) 4621 server->total_read = buf_data_size + iter_size; 4622 4623 return rc; 4624 } 4625 4626 static int 4627 cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size, 4628 size_t skip, struct iov_iter *iter) 4629 { 4630 for (; folioq; folioq = folioq->next) { 4631 for (int s = 0; s < folioq_count(folioq); s++) { 4632 struct folio *folio = folioq_folio(folioq, s); 4633 size_t fsize = folio_size(folio); 4634 size_t n, len = umin(fsize - skip, data_size); 4635 4636 n = copy_folio_to_iter(folio, skip, len, iter); 4637 if (n != len) { 4638 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4639 return -EIO; 4640 } 4641 data_size -= n; 4642 skip = 0; 4643 } 4644 } 4645 4646 return 0; 4647 } 4648 4649 static int 4650 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4651 char *buf, unsigned int buf_len, struct folio_queue *buffer, 4652 unsigned int buffer_len, bool is_offloaded) 4653 { 4654 unsigned int data_offset; 4655 unsigned int data_len; 4656 unsigned int cur_off; 4657 unsigned int cur_page_idx; 4658 unsigned int pad_len; 4659 struct cifs_io_subrequest *rdata = mid->callback_data; 4660 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4661 int length; 4662 bool use_rdma_mr = false; 4663 4664 if (shdr->Command != SMB2_READ) { 4665 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4666 return -EOPNOTSUPP; 4667 } 4668 4669 if (server->ops->is_session_expired && 4670 server->ops->is_session_expired(buf)) { 4671 if (!is_offloaded) 4672 cifs_reconnect(server, true); 4673 return -1; 4674 } 4675 4676 if (server->ops->is_status_pending && 4677 server->ops->is_status_pending(buf, server)) 4678 return -1; 4679 4680 /* set up first two iov to get credits */ 4681 rdata->iov[0].iov_base = buf; 4682 rdata->iov[0].iov_len = 0; 4683 rdata->iov[1].iov_base = buf; 4684 rdata->iov[1].iov_len = 4685 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4686 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4687 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4688 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4689 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4690 4691 rdata->result = server->ops->map_error(buf, true); 4692 if (rdata->result != 0) { 4693 cifs_dbg(FYI, "%s: server returned error %d\n", 4694 __func__, rdata->result); 4695 /* normal error on read response */ 4696 if (is_offloaded) 4697 mid->mid_state = MID_RESPONSE_RECEIVED; 4698 else 4699 dequeue_mid(mid, false); 4700 return 0; 4701 } 4702 4703 data_offset = server->ops->read_data_offset(buf); 4704 #ifdef CONFIG_CIFS_SMB_DIRECT 4705 use_rdma_mr = rdata->mr; 4706 #endif 4707 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4708 4709 if (data_offset < server->vals->read_rsp_size) { 4710 /* 4711 * win2k8 sometimes sends an offset of 0 when the read 4712 * is beyond the EOF. Treat it as if the data starts just after 4713 * the header. 4714 */ 4715 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4716 __func__, data_offset); 4717 data_offset = server->vals->read_rsp_size; 4718 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4719 /* data_offset is beyond the end of smallbuf */ 4720 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4721 __func__, data_offset); 4722 rdata->result = -EIO; 4723 if (is_offloaded) 4724 mid->mid_state = MID_RESPONSE_MALFORMED; 4725 else 4726 dequeue_mid(mid, rdata->result); 4727 return 0; 4728 } 4729 4730 pad_len = data_offset - server->vals->read_rsp_size; 4731 4732 if (buf_len <= data_offset) { 4733 /* read response payload is in pages */ 4734 cur_page_idx = pad_len / PAGE_SIZE; 4735 cur_off = pad_len % PAGE_SIZE; 4736 4737 if (cur_page_idx != 0) { 4738 /* data offset is beyond the 1st page of response */ 4739 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4740 __func__, data_offset); 4741 rdata->result = -EIO; 4742 if (is_offloaded) 4743 mid->mid_state = MID_RESPONSE_MALFORMED; 4744 else 4745 dequeue_mid(mid, rdata->result); 4746 return 0; 4747 } 4748 4749 if (data_len > buffer_len - pad_len) { 4750 /* data_len is corrupt -- discard frame */ 4751 rdata->result = -EIO; 4752 if (is_offloaded) 4753 mid->mid_state = MID_RESPONSE_MALFORMED; 4754 else 4755 dequeue_mid(mid, rdata->result); 4756 return 0; 4757 } 4758 4759 /* Copy the data to the output I/O iterator. */ 4760 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len, 4761 cur_off, &rdata->subreq.io_iter); 4762 if (rdata->result != 0) { 4763 if (is_offloaded) 4764 mid->mid_state = MID_RESPONSE_MALFORMED; 4765 else 4766 dequeue_mid(mid, rdata->result); 4767 return 0; 4768 } 4769 rdata->got_bytes = buffer_len; 4770 4771 } else if (buf_len >= data_offset + data_len) { 4772 /* read response payload is in buf */ 4773 WARN_ONCE(buffer, "read data can be either in buf or in buffer"); 4774 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4775 if (length < 0) 4776 return length; 4777 rdata->got_bytes = data_len; 4778 } else { 4779 /* read response payload cannot be in both buf and pages */ 4780 WARN_ONCE(1, "buf can not contain only a part of read data"); 4781 rdata->result = -EIO; 4782 if (is_offloaded) 4783 mid->mid_state = MID_RESPONSE_MALFORMED; 4784 else 4785 dequeue_mid(mid, rdata->result); 4786 return 0; 4787 } 4788 4789 if (is_offloaded) 4790 mid->mid_state = MID_RESPONSE_RECEIVED; 4791 else 4792 dequeue_mid(mid, false); 4793 return 0; 4794 } 4795 4796 struct smb2_decrypt_work { 4797 struct work_struct decrypt; 4798 struct TCP_Server_Info *server; 4799 struct folio_queue *buffer; 4800 char *buf; 4801 unsigned int len; 4802 }; 4803 4804 4805 static void smb2_decrypt_offload(struct work_struct *work) 4806 { 4807 struct smb2_decrypt_work *dw = container_of(work, 4808 struct smb2_decrypt_work, decrypt); 4809 int rc; 4810 struct mid_q_entry *mid; 4811 struct iov_iter iter; 4812 4813 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len); 4814 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4815 &iter, true); 4816 if (rc) { 4817 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4818 goto free_pages; 4819 } 4820 4821 dw->server->lstrp = jiffies; 4822 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4823 if (mid == NULL) 4824 cifs_dbg(FYI, "mid not found\n"); 4825 else { 4826 mid->decrypted = true; 4827 rc = handle_read_data(dw->server, mid, dw->buf, 4828 dw->server->vals->read_rsp_size, 4829 dw->buffer, dw->len, 4830 true); 4831 if (rc >= 0) { 4832 #ifdef CONFIG_CIFS_STATS2 4833 mid->when_received = jiffies; 4834 #endif 4835 if (dw->server->ops->is_network_name_deleted) 4836 dw->server->ops->is_network_name_deleted(dw->buf, 4837 dw->server); 4838 4839 mid_execute_callback(mid); 4840 } else { 4841 spin_lock(&dw->server->srv_lock); 4842 if (dw->server->tcpStatus == CifsNeedReconnect) { 4843 spin_lock(&dw->server->mid_queue_lock); 4844 mid->mid_state = MID_RETRY_NEEDED; 4845 spin_unlock(&dw->server->mid_queue_lock); 4846 spin_unlock(&dw->server->srv_lock); 4847 mid_execute_callback(mid); 4848 } else { 4849 spin_lock(&dw->server->mid_queue_lock); 4850 mid->mid_state = MID_REQUEST_SUBMITTED; 4851 mid->deleted_from_q = false; 4852 list_add_tail(&mid->qhead, 4853 &dw->server->pending_mid_q); 4854 spin_unlock(&dw->server->mid_queue_lock); 4855 spin_unlock(&dw->server->srv_lock); 4856 } 4857 } 4858 release_mid(mid); 4859 } 4860 4861 free_pages: 4862 cifs_clear_folioq_buffer(dw->buffer); 4863 cifs_small_buf_release(dw->buf); 4864 kfree(dw); 4865 } 4866 4867 4868 static int 4869 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4870 int *num_mids) 4871 { 4872 char *buf = server->smallbuf; 4873 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4874 struct iov_iter iter; 4875 unsigned int len; 4876 unsigned int buflen = server->pdu_size; 4877 int rc; 4878 struct smb2_decrypt_work *dw; 4879 4880 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4881 if (!dw) 4882 return -ENOMEM; 4883 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4884 dw->server = server; 4885 4886 *num_mids = 1; 4887 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4888 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4889 4890 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4891 if (rc < 0) 4892 goto free_dw; 4893 server->total_read += rc; 4894 4895 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4896 server->vals->read_rsp_size; 4897 dw->len = len; 4898 len = round_up(dw->len, PAGE_SIZE); 4899 4900 rc = -ENOMEM; 4901 dw->buffer = cifs_alloc_folioq_buffer(len); 4902 if (!dw->buffer) 4903 goto discard_data; 4904 4905 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len); 4906 4907 /* Read the data into the buffer and clear excess bufferage. */ 4908 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4909 if (rc < 0) 4910 goto discard_data; 4911 4912 server->total_read += rc; 4913 if (rc < len) { 4914 struct iov_iter tmp = iter; 4915 4916 iov_iter_advance(&tmp, rc); 4917 iov_iter_zero(len - rc, &tmp); 4918 } 4919 iov_iter_truncate(&iter, dw->len); 4920 4921 rc = cifs_discard_remaining_data(server); 4922 if (rc) 4923 goto free_pages; 4924 4925 /* 4926 * For large reads, offload to different thread for better performance, 4927 * use more cores decrypting which can be expensive 4928 */ 4929 4930 if ((server->min_offload) && (server->in_flight > 1) && 4931 (server->pdu_size >= server->min_offload)) { 4932 dw->buf = server->smallbuf; 4933 server->smallbuf = (char *)cifs_small_buf_get(); 4934 4935 queue_work(decrypt_wq, &dw->decrypt); 4936 *num_mids = 0; /* worker thread takes care of finding mid */ 4937 return -1; 4938 } 4939 4940 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4941 &iter, false); 4942 if (rc) 4943 goto free_pages; 4944 4945 *mid = smb2_find_mid(server, buf); 4946 if (*mid == NULL) { 4947 cifs_dbg(FYI, "mid not found\n"); 4948 } else { 4949 cifs_dbg(FYI, "mid found\n"); 4950 (*mid)->decrypted = true; 4951 rc = handle_read_data(server, *mid, buf, 4952 server->vals->read_rsp_size, 4953 dw->buffer, dw->len, false); 4954 if (rc >= 0) { 4955 if (server->ops->is_network_name_deleted) { 4956 server->ops->is_network_name_deleted(buf, 4957 server); 4958 } 4959 } 4960 } 4961 4962 free_pages: 4963 cifs_clear_folioq_buffer(dw->buffer); 4964 free_dw: 4965 kfree(dw); 4966 return rc; 4967 discard_data: 4968 cifs_discard_remaining_data(server); 4969 goto free_pages; 4970 } 4971 4972 static int 4973 receive_encrypted_standard(struct TCP_Server_Info *server, 4974 struct mid_q_entry **mids, char **bufs, 4975 int *num_mids) 4976 { 4977 int ret, length; 4978 char *buf = server->smallbuf; 4979 struct smb2_hdr *shdr; 4980 unsigned int pdu_length = server->pdu_size; 4981 unsigned int buf_size; 4982 unsigned int next_cmd; 4983 struct mid_q_entry *mid_entry; 4984 int next_is_large; 4985 char *next_buffer = NULL; 4986 4987 *num_mids = 0; 4988 4989 /* switch to large buffer if too big for a small one */ 4990 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4991 server->large_buf = true; 4992 memcpy(server->bigbuf, buf, server->total_read); 4993 buf = server->bigbuf; 4994 } 4995 4996 /* now read the rest */ 4997 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4998 pdu_length - HEADER_SIZE(server) + 1); 4999 if (length < 0) 5000 return length; 5001 server->total_read += length; 5002 5003 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 5004 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 5005 if (length) 5006 return length; 5007 5008 next_is_large = server->large_buf; 5009 one_more: 5010 shdr = (struct smb2_hdr *)buf; 5011 next_cmd = le32_to_cpu(shdr->NextCommand); 5012 if (next_cmd) { 5013 if (WARN_ON_ONCE(next_cmd > pdu_length)) 5014 return -1; 5015 if (next_is_large) 5016 next_buffer = (char *)cifs_buf_get(); 5017 else 5018 next_buffer = (char *)cifs_small_buf_get(); 5019 if (!next_buffer) { 5020 cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); 5021 return -1; 5022 } 5023 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 5024 } 5025 5026 mid_entry = smb2_find_mid(server, buf); 5027 if (mid_entry == NULL) 5028 cifs_dbg(FYI, "mid not found\n"); 5029 else { 5030 cifs_dbg(FYI, "mid found\n"); 5031 mid_entry->decrypted = true; 5032 mid_entry->resp_buf_size = server->pdu_size; 5033 } 5034 5035 if (*num_mids >= MAX_COMPOUND) { 5036 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5037 return -1; 5038 } 5039 bufs[*num_mids] = buf; 5040 mids[(*num_mids)++] = mid_entry; 5041 5042 if (mid_entry && mid_entry->handle) 5043 ret = mid_entry->handle(server, mid_entry); 5044 else 5045 ret = cifs_handle_standard(server, mid_entry); 5046 5047 if (ret == 0 && next_cmd) { 5048 pdu_length -= next_cmd; 5049 server->large_buf = next_is_large; 5050 if (next_is_large) 5051 server->bigbuf = buf = next_buffer; 5052 else 5053 server->smallbuf = buf = next_buffer; 5054 goto one_more; 5055 } else if (ret != 0) { 5056 /* 5057 * ret != 0 here means that we didn't get to handle_mid() thus 5058 * server->smallbuf and server->bigbuf are still valid. We need 5059 * to free next_buffer because it is not going to be used 5060 * anywhere. 5061 */ 5062 if (next_is_large) 5063 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5064 else 5065 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5066 } 5067 5068 return ret; 5069 } 5070 5071 static int 5072 smb3_receive_transform(struct TCP_Server_Info *server, 5073 struct mid_q_entry **mids, char **bufs, int *num_mids) 5074 { 5075 char *buf = server->smallbuf; 5076 unsigned int pdu_length = server->pdu_size; 5077 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5078 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5079 5080 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5081 sizeof(struct smb2_hdr)) { 5082 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5083 pdu_length); 5084 cifs_reconnect(server, true); 5085 return -ECONNABORTED; 5086 } 5087 5088 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5089 cifs_server_dbg(VFS, "Transform message is broken\n"); 5090 cifs_reconnect(server, true); 5091 return -ECONNABORTED; 5092 } 5093 5094 /* TODO: add support for compounds containing READ. */ 5095 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5096 return receive_encrypted_read(server, &mids[0], num_mids); 5097 } 5098 5099 return receive_encrypted_standard(server, mids, bufs, num_mids); 5100 } 5101 5102 int 5103 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5104 { 5105 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5106 5107 return handle_read_data(server, mid, buf, server->pdu_size, 5108 NULL, 0, false); 5109 } 5110 5111 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5112 unsigned int *noff) 5113 { 5114 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5115 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5116 5117 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5118 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5119 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5120 return -EINVAL; 5121 } else { 5122 *noff = le32_to_cpu(hdr->NextCommand); 5123 } 5124 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5125 return -EINVAL; 5126 return 0; 5127 } 5128 5129 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5130 struct dentry *dentry, struct cifs_tcon *tcon, 5131 const char *full_path, umode_t mode, dev_t dev, 5132 const char *symname) 5133 { 5134 struct TCP_Server_Info *server = tcon->ses->server; 5135 struct cifs_open_parms oparms; 5136 struct cifs_open_info_data idata; 5137 struct cifs_io_parms io_parms = {}; 5138 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5139 struct cifs_fid fid; 5140 unsigned int bytes_written; 5141 u8 type[8]; 5142 int type_len = 0; 5143 struct { 5144 __le64 major; 5145 __le64 minor; 5146 } __packed pdev = {}; 5147 __le16 *symname_utf16 = NULL; 5148 u8 *data = NULL; 5149 int data_len = 0; 5150 struct kvec iov[3]; 5151 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5152 int rc; 5153 5154 switch (mode & S_IFMT) { 5155 case S_IFCHR: 5156 type_len = 8; 5157 memcpy(type, "IntxCHR\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_IFBLK: 5164 type_len = 8; 5165 memcpy(type, "IntxBLK\0", type_len); 5166 pdev.major = cpu_to_le64(MAJOR(dev)); 5167 pdev.minor = cpu_to_le64(MINOR(dev)); 5168 data = (u8 *)&pdev; 5169 data_len = sizeof(pdev); 5170 break; 5171 case S_IFLNK: 5172 type_len = 8; 5173 memcpy(type, "IntxLNK\1", type_len); 5174 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname), 5175 &data_len, cifs_sb->local_nls, 5176 NO_MAP_UNI_RSVD); 5177 if (!symname_utf16) { 5178 rc = -ENOMEM; 5179 goto out; 5180 } 5181 data_len -= 2; /* symlink is without trailing wide-nul */ 5182 data = (u8 *)symname_utf16; 5183 break; 5184 case S_IFSOCK: 5185 type_len = 8; 5186 strscpy(type, "LnxSOCK"); 5187 data = (u8 *)&pdev; 5188 data_len = sizeof(pdev); 5189 break; 5190 case S_IFIFO: 5191 type_len = 8; 5192 strscpy(type, "LnxFIFO"); 5193 data = (u8 *)&pdev; 5194 data_len = sizeof(pdev); 5195 break; 5196 default: 5197 rc = -EPERM; 5198 goto out; 5199 } 5200 5201 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5202 FILE_CREATE, CREATE_NOT_DIR | 5203 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5204 oparms.fid = &fid; 5205 idata.contains_posix_file_info = false; 5206 rc = server->ops->open(xid, &oparms, &oplock, &idata); 5207 if (rc) 5208 goto out; 5209 5210 /* 5211 * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL 5212 * option. If not then server does not support ATTR_SYSTEM and newly 5213 * created file is not SFU compatible, which means that the call failed. 5214 */ 5215 if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) { 5216 rc = -EOPNOTSUPP; 5217 goto out_close; 5218 } 5219 5220 if (type_len + data_len > 0) { 5221 io_parms.pid = current->tgid; 5222 io_parms.tcon = tcon; 5223 io_parms.length = type_len + data_len; 5224 iov[1].iov_base = type; 5225 iov[1].iov_len = type_len; 5226 iov[2].iov_base = data; 5227 iov[2].iov_len = data_len; 5228 5229 rc = server->ops->sync_write(xid, &fid, &io_parms, 5230 &bytes_written, 5231 iov, ARRAY_SIZE(iov)-1); 5232 } 5233 5234 out_close: 5235 server->ops->close(xid, tcon, &fid); 5236 5237 /* 5238 * If CREATE was successful but either setting ATTR_SYSTEM failed or 5239 * writing type/data information failed then remove the intermediate 5240 * object created by CREATE. Otherwise intermediate empty object stay 5241 * on the server. 5242 */ 5243 if (rc) 5244 server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL); 5245 5246 out: 5247 kfree(symname_utf16); 5248 return rc; 5249 } 5250 5251 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5252 struct dentry *dentry, struct cifs_tcon *tcon, 5253 const char *full_path, umode_t mode, dev_t dev) 5254 { 5255 struct inode *new = NULL; 5256 int rc; 5257 5258 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5259 full_path, mode, dev, NULL); 5260 if (rc) 5261 return rc; 5262 5263 if (tcon->posix_extensions) { 5264 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5265 inode->i_sb, xid); 5266 } else if (tcon->unix_ext) { 5267 rc = cifs_get_inode_info_unix(&new, full_path, 5268 inode->i_sb, xid); 5269 } else { 5270 rc = cifs_get_inode_info(&new, full_path, NULL, 5271 inode->i_sb, xid, NULL); 5272 } 5273 if (!rc) 5274 d_instantiate(dentry, new); 5275 return rc; 5276 } 5277 5278 static int smb2_make_node(unsigned int xid, struct inode *inode, 5279 struct dentry *dentry, struct cifs_tcon *tcon, 5280 const char *full_path, umode_t mode, dev_t dev) 5281 { 5282 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5283 int rc = -EOPNOTSUPP; 5284 5285 /* 5286 * Check if mounted with mount parm 'sfu' mount parm. 5287 * SFU emulation should work with all servers, but only 5288 * supports block and char device, socket & fifo, 5289 * and was used by default in earlier versions of Windows 5290 */ 5291 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5292 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5293 full_path, mode, dev); 5294 } else if (CIFS_REPARSE_SUPPORT(tcon)) { 5295 rc = mknod_reparse(xid, inode, dentry, tcon, 5296 full_path, mode, dev); 5297 } 5298 return rc; 5299 } 5300 5301 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5302 struct smb_version_operations smb20_operations = { 5303 .compare_fids = smb2_compare_fids, 5304 .setup_request = smb2_setup_request, 5305 .setup_async_request = smb2_setup_async_request, 5306 .check_receive = smb2_check_receive, 5307 .add_credits = smb2_add_credits, 5308 .set_credits = smb2_set_credits, 5309 .get_credits_field = smb2_get_credits_field, 5310 .get_credits = smb2_get_credits, 5311 .wait_mtu_credits = cifs_wait_mtu_credits, 5312 .get_next_mid = smb2_get_next_mid, 5313 .revert_current_mid = smb2_revert_current_mid, 5314 .read_data_offset = smb2_read_data_offset, 5315 .read_data_length = smb2_read_data_length, 5316 .map_error = map_smb2_to_linux_error, 5317 .find_mid = smb2_find_mid, 5318 .check_message = smb2_check_message, 5319 .dump_detail = smb2_dump_detail, 5320 .clear_stats = smb2_clear_stats, 5321 .print_stats = smb2_print_stats, 5322 .is_oplock_break = smb2_is_valid_oplock_break, 5323 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5324 .downgrade_oplock = smb2_downgrade_oplock, 5325 .need_neg = smb2_need_neg, 5326 .negotiate = smb2_negotiate, 5327 .negotiate_wsize = smb2_negotiate_wsize, 5328 .negotiate_rsize = smb2_negotiate_rsize, 5329 .sess_setup = SMB2_sess_setup, 5330 .logoff = SMB2_logoff, 5331 .tree_connect = SMB2_tcon, 5332 .tree_disconnect = SMB2_tdis, 5333 .qfs_tcon = smb2_qfs_tcon, 5334 .is_path_accessible = smb2_is_path_accessible, 5335 .can_echo = smb2_can_echo, 5336 .echo = SMB2_echo, 5337 .query_path_info = smb2_query_path_info, 5338 .query_reparse_point = smb2_query_reparse_point, 5339 .get_srv_inum = smb2_get_srv_inum, 5340 .query_file_info = smb2_query_file_info, 5341 .set_path_size = smb2_set_path_size, 5342 .set_file_size = smb2_set_file_size, 5343 .set_file_info = smb2_set_file_info, 5344 .set_compression = smb2_set_compression, 5345 .mkdir = smb2_mkdir, 5346 .mkdir_setinfo = smb2_mkdir_setinfo, 5347 .rmdir = smb2_rmdir, 5348 .unlink = smb2_unlink, 5349 .rename = smb2_rename_path, 5350 .create_hardlink = smb2_create_hardlink, 5351 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5352 .query_mf_symlink = smb3_query_mf_symlink, 5353 .create_mf_symlink = smb3_create_mf_symlink, 5354 .create_reparse_inode = smb2_create_reparse_inode, 5355 .open = smb2_open_file, 5356 .set_fid = smb2_set_fid, 5357 .close = smb2_close_file, 5358 .flush = smb2_flush_file, 5359 .async_readv = smb2_async_readv, 5360 .async_writev = smb2_async_writev, 5361 .sync_read = smb2_sync_read, 5362 .sync_write = smb2_sync_write, 5363 .query_dir_first = smb2_query_dir_first, 5364 .query_dir_next = smb2_query_dir_next, 5365 .close_dir = smb2_close_dir, 5366 .calc_smb_size = smb2_calc_size, 5367 .is_status_pending = smb2_is_status_pending, 5368 .is_session_expired = smb2_is_session_expired, 5369 .oplock_response = smb2_oplock_response, 5370 .queryfs = smb2_queryfs, 5371 .mand_lock = smb2_mand_lock, 5372 .mand_unlock_range = smb2_unlock_range, 5373 .push_mand_locks = smb2_push_mandatory_locks, 5374 .get_lease_key = smb2_get_lease_key, 5375 .set_lease_key = smb2_set_lease_key, 5376 .new_lease_key = smb2_new_lease_key, 5377 .calc_signature = smb2_calc_signature, 5378 .is_read_op = smb2_is_read_op, 5379 .set_oplock_level = smb2_set_oplock_level, 5380 .create_lease_buf = smb2_create_lease_buf, 5381 .parse_lease_buf = smb2_parse_lease_buf, 5382 .copychunk_range = smb2_copychunk_range, 5383 .wp_retry_size = smb2_wp_retry_size, 5384 .dir_needs_close = smb2_dir_needs_close, 5385 .get_dfs_refer = smb2_get_dfs_refer, 5386 .select_sectype = smb2_select_sectype, 5387 #ifdef CONFIG_CIFS_XATTR 5388 .query_all_EAs = smb2_query_eas, 5389 .set_EA = smb2_set_ea, 5390 #endif /* CIFS_XATTR */ 5391 .get_acl = get_smb2_acl, 5392 .get_acl_by_fid = get_smb2_acl_by_fid, 5393 .set_acl = set_smb2_acl, 5394 .next_header = smb2_next_header, 5395 .ioctl_query_info = smb2_ioctl_query_info, 5396 .make_node = smb2_make_node, 5397 .fiemap = smb3_fiemap, 5398 .llseek = smb3_llseek, 5399 .is_status_io_timeout = smb2_is_status_io_timeout, 5400 .is_network_name_deleted = smb2_is_network_name_deleted, 5401 .rename_pending_delete = smb2_rename_pending_delete, 5402 }; 5403 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5404 5405 struct smb_version_operations smb21_operations = { 5406 .compare_fids = smb2_compare_fids, 5407 .setup_request = smb2_setup_request, 5408 .setup_async_request = smb2_setup_async_request, 5409 .check_receive = smb2_check_receive, 5410 .add_credits = smb2_add_credits, 5411 .set_credits = smb2_set_credits, 5412 .get_credits_field = smb2_get_credits_field, 5413 .get_credits = smb2_get_credits, 5414 .wait_mtu_credits = smb2_wait_mtu_credits, 5415 .adjust_credits = smb2_adjust_credits, 5416 .get_next_mid = smb2_get_next_mid, 5417 .revert_current_mid = smb2_revert_current_mid, 5418 .read_data_offset = smb2_read_data_offset, 5419 .read_data_length = smb2_read_data_length, 5420 .map_error = map_smb2_to_linux_error, 5421 .find_mid = smb2_find_mid, 5422 .check_message = smb2_check_message, 5423 .dump_detail = smb2_dump_detail, 5424 .clear_stats = smb2_clear_stats, 5425 .print_stats = smb2_print_stats, 5426 .is_oplock_break = smb2_is_valid_oplock_break, 5427 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5428 .downgrade_oplock = smb2_downgrade_oplock, 5429 .need_neg = smb2_need_neg, 5430 .negotiate = smb2_negotiate, 5431 .negotiate_wsize = smb2_negotiate_wsize, 5432 .negotiate_rsize = smb2_negotiate_rsize, 5433 .sess_setup = SMB2_sess_setup, 5434 .logoff = SMB2_logoff, 5435 .tree_connect = SMB2_tcon, 5436 .tree_disconnect = SMB2_tdis, 5437 .qfs_tcon = smb2_qfs_tcon, 5438 .is_path_accessible = smb2_is_path_accessible, 5439 .can_echo = smb2_can_echo, 5440 .echo = SMB2_echo, 5441 .query_path_info = smb2_query_path_info, 5442 .query_reparse_point = smb2_query_reparse_point, 5443 .get_srv_inum = smb2_get_srv_inum, 5444 .query_file_info = smb2_query_file_info, 5445 .set_path_size = smb2_set_path_size, 5446 .set_file_size = smb2_set_file_size, 5447 .set_file_info = smb2_set_file_info, 5448 .set_compression = smb2_set_compression, 5449 .mkdir = smb2_mkdir, 5450 .mkdir_setinfo = smb2_mkdir_setinfo, 5451 .rmdir = smb2_rmdir, 5452 .unlink = smb2_unlink, 5453 .rename = smb2_rename_path, 5454 .create_hardlink = smb2_create_hardlink, 5455 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5456 .query_mf_symlink = smb3_query_mf_symlink, 5457 .create_mf_symlink = smb3_create_mf_symlink, 5458 .create_reparse_inode = smb2_create_reparse_inode, 5459 .open = smb2_open_file, 5460 .set_fid = smb2_set_fid, 5461 .close = smb2_close_file, 5462 .flush = smb2_flush_file, 5463 .async_readv = smb2_async_readv, 5464 .async_writev = smb2_async_writev, 5465 .sync_read = smb2_sync_read, 5466 .sync_write = smb2_sync_write, 5467 .query_dir_first = smb2_query_dir_first, 5468 .query_dir_next = smb2_query_dir_next, 5469 .close_dir = smb2_close_dir, 5470 .calc_smb_size = smb2_calc_size, 5471 .is_status_pending = smb2_is_status_pending, 5472 .is_session_expired = smb2_is_session_expired, 5473 .oplock_response = smb2_oplock_response, 5474 .queryfs = smb2_queryfs, 5475 .mand_lock = smb2_mand_lock, 5476 .mand_unlock_range = smb2_unlock_range, 5477 .push_mand_locks = smb2_push_mandatory_locks, 5478 .get_lease_key = smb2_get_lease_key, 5479 .set_lease_key = smb2_set_lease_key, 5480 .new_lease_key = smb2_new_lease_key, 5481 .calc_signature = smb2_calc_signature, 5482 .is_read_op = smb21_is_read_op, 5483 .set_oplock_level = smb21_set_oplock_level, 5484 .create_lease_buf = smb2_create_lease_buf, 5485 .parse_lease_buf = smb2_parse_lease_buf, 5486 .copychunk_range = smb2_copychunk_range, 5487 .wp_retry_size = smb2_wp_retry_size, 5488 .dir_needs_close = smb2_dir_needs_close, 5489 .enum_snapshots = smb3_enum_snapshots, 5490 .notify = smb3_notify, 5491 .get_dfs_refer = smb2_get_dfs_refer, 5492 .select_sectype = smb2_select_sectype, 5493 #ifdef CONFIG_CIFS_XATTR 5494 .query_all_EAs = smb2_query_eas, 5495 .set_EA = smb2_set_ea, 5496 #endif /* CIFS_XATTR */ 5497 .get_acl = get_smb2_acl, 5498 .get_acl_by_fid = get_smb2_acl_by_fid, 5499 .set_acl = set_smb2_acl, 5500 .next_header = smb2_next_header, 5501 .ioctl_query_info = smb2_ioctl_query_info, 5502 .make_node = smb2_make_node, 5503 .fiemap = smb3_fiemap, 5504 .llseek = smb3_llseek, 5505 .is_status_io_timeout = smb2_is_status_io_timeout, 5506 .is_network_name_deleted = smb2_is_network_name_deleted, 5507 .rename_pending_delete = smb2_rename_pending_delete, 5508 }; 5509 5510 struct smb_version_operations smb30_operations = { 5511 .compare_fids = smb2_compare_fids, 5512 .setup_request = smb2_setup_request, 5513 .setup_async_request = smb2_setup_async_request, 5514 .check_receive = smb2_check_receive, 5515 .add_credits = smb2_add_credits, 5516 .set_credits = smb2_set_credits, 5517 .get_credits_field = smb2_get_credits_field, 5518 .get_credits = smb2_get_credits, 5519 .wait_mtu_credits = smb2_wait_mtu_credits, 5520 .adjust_credits = smb2_adjust_credits, 5521 .get_next_mid = smb2_get_next_mid, 5522 .revert_current_mid = smb2_revert_current_mid, 5523 .read_data_offset = smb2_read_data_offset, 5524 .read_data_length = smb2_read_data_length, 5525 .map_error = map_smb2_to_linux_error, 5526 .find_mid = smb2_find_mid, 5527 .check_message = smb2_check_message, 5528 .dump_detail = smb2_dump_detail, 5529 .clear_stats = smb2_clear_stats, 5530 .print_stats = smb2_print_stats, 5531 .dump_share_caps = smb2_dump_share_caps, 5532 .is_oplock_break = smb2_is_valid_oplock_break, 5533 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5534 .downgrade_oplock = smb3_downgrade_oplock, 5535 .need_neg = smb2_need_neg, 5536 .negotiate = smb2_negotiate, 5537 .negotiate_wsize = smb3_negotiate_wsize, 5538 .negotiate_rsize = smb3_negotiate_rsize, 5539 .sess_setup = SMB2_sess_setup, 5540 .logoff = SMB2_logoff, 5541 .tree_connect = SMB2_tcon, 5542 .tree_disconnect = SMB2_tdis, 5543 .qfs_tcon = smb3_qfs_tcon, 5544 .query_server_interfaces = SMB3_request_interfaces, 5545 .is_path_accessible = smb2_is_path_accessible, 5546 .can_echo = smb2_can_echo, 5547 .echo = SMB2_echo, 5548 .query_path_info = smb2_query_path_info, 5549 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5550 .query_reparse_point = smb2_query_reparse_point, 5551 .get_srv_inum = smb2_get_srv_inum, 5552 .query_file_info = smb2_query_file_info, 5553 .set_path_size = smb2_set_path_size, 5554 .set_file_size = smb2_set_file_size, 5555 .set_file_info = smb2_set_file_info, 5556 .set_compression = smb2_set_compression, 5557 .mkdir = smb2_mkdir, 5558 .mkdir_setinfo = smb2_mkdir_setinfo, 5559 .rmdir = smb2_rmdir, 5560 .unlink = smb2_unlink, 5561 .rename = smb2_rename_path, 5562 .create_hardlink = smb2_create_hardlink, 5563 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5564 .query_mf_symlink = smb3_query_mf_symlink, 5565 .create_mf_symlink = smb3_create_mf_symlink, 5566 .create_reparse_inode = smb2_create_reparse_inode, 5567 .open = smb2_open_file, 5568 .set_fid = smb2_set_fid, 5569 .close = smb2_close_file, 5570 .close_getattr = smb2_close_getattr, 5571 .flush = smb2_flush_file, 5572 .async_readv = smb2_async_readv, 5573 .async_writev = smb2_async_writev, 5574 .sync_read = smb2_sync_read, 5575 .sync_write = smb2_sync_write, 5576 .query_dir_first = smb2_query_dir_first, 5577 .query_dir_next = smb2_query_dir_next, 5578 .close_dir = smb2_close_dir, 5579 .calc_smb_size = smb2_calc_size, 5580 .is_status_pending = smb2_is_status_pending, 5581 .is_session_expired = smb2_is_session_expired, 5582 .oplock_response = smb2_oplock_response, 5583 .queryfs = smb2_queryfs, 5584 .mand_lock = smb2_mand_lock, 5585 .mand_unlock_range = smb2_unlock_range, 5586 .push_mand_locks = smb2_push_mandatory_locks, 5587 .get_lease_key = smb2_get_lease_key, 5588 .set_lease_key = smb2_set_lease_key, 5589 .new_lease_key = smb2_new_lease_key, 5590 .generate_signingkey = generate_smb30signingkey, 5591 .calc_signature = smb3_calc_signature, 5592 .set_integrity = smb3_set_integrity, 5593 .is_read_op = smb21_is_read_op, 5594 .set_oplock_level = smb3_set_oplock_level, 5595 .create_lease_buf = smb3_create_lease_buf, 5596 .parse_lease_buf = smb3_parse_lease_buf, 5597 .copychunk_range = smb2_copychunk_range, 5598 .duplicate_extents = smb2_duplicate_extents, 5599 .validate_negotiate = smb3_validate_negotiate, 5600 .wp_retry_size = smb2_wp_retry_size, 5601 .dir_needs_close = smb2_dir_needs_close, 5602 .fallocate = smb3_fallocate, 5603 .enum_snapshots = smb3_enum_snapshots, 5604 .notify = smb3_notify, 5605 .init_transform_rq = smb3_init_transform_rq, 5606 .is_transform_hdr = smb3_is_transform_hdr, 5607 .receive_transform = smb3_receive_transform, 5608 .get_dfs_refer = smb2_get_dfs_refer, 5609 .select_sectype = smb2_select_sectype, 5610 #ifdef CONFIG_CIFS_XATTR 5611 .query_all_EAs = smb2_query_eas, 5612 .set_EA = smb2_set_ea, 5613 #endif /* CIFS_XATTR */ 5614 .get_acl = get_smb2_acl, 5615 .get_acl_by_fid = get_smb2_acl_by_fid, 5616 .set_acl = set_smb2_acl, 5617 .next_header = smb2_next_header, 5618 .ioctl_query_info = smb2_ioctl_query_info, 5619 .make_node = smb2_make_node, 5620 .fiemap = smb3_fiemap, 5621 .llseek = smb3_llseek, 5622 .is_status_io_timeout = smb2_is_status_io_timeout, 5623 .is_network_name_deleted = smb2_is_network_name_deleted, 5624 .rename_pending_delete = smb2_rename_pending_delete, 5625 }; 5626 5627 struct smb_version_operations smb311_operations = { 5628 .compare_fids = smb2_compare_fids, 5629 .setup_request = smb2_setup_request, 5630 .setup_async_request = smb2_setup_async_request, 5631 .check_receive = smb2_check_receive, 5632 .add_credits = smb2_add_credits, 5633 .set_credits = smb2_set_credits, 5634 .get_credits_field = smb2_get_credits_field, 5635 .get_credits = smb2_get_credits, 5636 .wait_mtu_credits = smb2_wait_mtu_credits, 5637 .adjust_credits = smb2_adjust_credits, 5638 .get_next_mid = smb2_get_next_mid, 5639 .revert_current_mid = smb2_revert_current_mid, 5640 .read_data_offset = smb2_read_data_offset, 5641 .read_data_length = smb2_read_data_length, 5642 .map_error = map_smb2_to_linux_error, 5643 .find_mid = smb2_find_mid, 5644 .check_message = smb2_check_message, 5645 .dump_detail = smb2_dump_detail, 5646 .clear_stats = smb2_clear_stats, 5647 .print_stats = smb2_print_stats, 5648 .dump_share_caps = smb2_dump_share_caps, 5649 .is_oplock_break = smb2_is_valid_oplock_break, 5650 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5651 .downgrade_oplock = smb3_downgrade_oplock, 5652 .need_neg = smb2_need_neg, 5653 .negotiate = smb2_negotiate, 5654 .negotiate_wsize = smb3_negotiate_wsize, 5655 .negotiate_rsize = smb3_negotiate_rsize, 5656 .sess_setup = SMB2_sess_setup, 5657 .logoff = SMB2_logoff, 5658 .tree_connect = SMB2_tcon, 5659 .tree_disconnect = SMB2_tdis, 5660 .qfs_tcon = smb3_qfs_tcon, 5661 .query_server_interfaces = SMB3_request_interfaces, 5662 .is_path_accessible = smb2_is_path_accessible, 5663 .can_echo = smb2_can_echo, 5664 .echo = SMB2_echo, 5665 .query_path_info = smb2_query_path_info, 5666 .query_reparse_point = smb2_query_reparse_point, 5667 .get_srv_inum = smb2_get_srv_inum, 5668 .query_file_info = smb2_query_file_info, 5669 .set_path_size = smb2_set_path_size, 5670 .set_file_size = smb2_set_file_size, 5671 .set_file_info = smb2_set_file_info, 5672 .set_compression = smb2_set_compression, 5673 .mkdir = smb2_mkdir, 5674 .mkdir_setinfo = smb2_mkdir_setinfo, 5675 .posix_mkdir = smb311_posix_mkdir, 5676 .rmdir = smb2_rmdir, 5677 .unlink = smb2_unlink, 5678 .rename = smb2_rename_path, 5679 .create_hardlink = smb2_create_hardlink, 5680 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5681 .query_mf_symlink = smb3_query_mf_symlink, 5682 .create_mf_symlink = smb3_create_mf_symlink, 5683 .create_reparse_inode = smb2_create_reparse_inode, 5684 .open = smb2_open_file, 5685 .set_fid = smb2_set_fid, 5686 .close = smb2_close_file, 5687 .close_getattr = smb2_close_getattr, 5688 .flush = smb2_flush_file, 5689 .async_readv = smb2_async_readv, 5690 .async_writev = smb2_async_writev, 5691 .sync_read = smb2_sync_read, 5692 .sync_write = smb2_sync_write, 5693 .query_dir_first = smb2_query_dir_first, 5694 .query_dir_next = smb2_query_dir_next, 5695 .close_dir = smb2_close_dir, 5696 .calc_smb_size = smb2_calc_size, 5697 .is_status_pending = smb2_is_status_pending, 5698 .is_session_expired = smb2_is_session_expired, 5699 .oplock_response = smb2_oplock_response, 5700 .queryfs = smb311_queryfs, 5701 .mand_lock = smb2_mand_lock, 5702 .mand_unlock_range = smb2_unlock_range, 5703 .push_mand_locks = smb2_push_mandatory_locks, 5704 .get_lease_key = smb2_get_lease_key, 5705 .set_lease_key = smb2_set_lease_key, 5706 .new_lease_key = smb2_new_lease_key, 5707 .generate_signingkey = generate_smb311signingkey, 5708 .calc_signature = smb3_calc_signature, 5709 .set_integrity = smb3_set_integrity, 5710 .is_read_op = smb21_is_read_op, 5711 .set_oplock_level = smb3_set_oplock_level, 5712 .create_lease_buf = smb3_create_lease_buf, 5713 .parse_lease_buf = smb3_parse_lease_buf, 5714 .copychunk_range = smb2_copychunk_range, 5715 .duplicate_extents = smb2_duplicate_extents, 5716 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5717 .wp_retry_size = smb2_wp_retry_size, 5718 .dir_needs_close = smb2_dir_needs_close, 5719 .fallocate = smb3_fallocate, 5720 .enum_snapshots = smb3_enum_snapshots, 5721 .notify = smb3_notify, 5722 .init_transform_rq = smb3_init_transform_rq, 5723 .is_transform_hdr = smb3_is_transform_hdr, 5724 .receive_transform = smb3_receive_transform, 5725 .get_dfs_refer = smb2_get_dfs_refer, 5726 .select_sectype = smb2_select_sectype, 5727 #ifdef CONFIG_CIFS_XATTR 5728 .query_all_EAs = smb2_query_eas, 5729 .set_EA = smb2_set_ea, 5730 #endif /* CIFS_XATTR */ 5731 .get_acl = get_smb2_acl, 5732 .get_acl_by_fid = get_smb2_acl_by_fid, 5733 .set_acl = set_smb2_acl, 5734 .next_header = smb2_next_header, 5735 .ioctl_query_info = smb2_ioctl_query_info, 5736 .make_node = smb2_make_node, 5737 .fiemap = smb3_fiemap, 5738 .llseek = smb3_llseek, 5739 .is_status_io_timeout = smb2_is_status_io_timeout, 5740 .is_network_name_deleted = smb2_is_network_name_deleted, 5741 .rename_pending_delete = smb2_rename_pending_delete, 5742 }; 5743 5744 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5745 struct smb_version_values smb20_values = { 5746 .version_string = SMB20_VERSION_STRING, 5747 .protocol_id = SMB20_PROT_ID, 5748 .req_capabilities = 0, /* MBZ */ 5749 .large_lock_type = 0, 5750 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5751 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5752 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5753 .header_size = sizeof(struct smb2_hdr), 5754 .header_preamble_size = 0, 5755 .max_header_size = MAX_SMB2_HDR_SIZE, 5756 .read_rsp_size = sizeof(struct smb2_read_rsp), 5757 .lock_cmd = SMB2_LOCK, 5758 .cap_unix = 0, 5759 .cap_nt_find = SMB2_NT_FIND, 5760 .cap_large_files = SMB2_LARGE_FILES, 5761 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5762 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5763 .create_lease_size = sizeof(struct create_lease), 5764 }; 5765 #endif /* ALLOW_INSECURE_LEGACY */ 5766 5767 struct smb_version_values smb21_values = { 5768 .version_string = SMB21_VERSION_STRING, 5769 .protocol_id = SMB21_PROT_ID, 5770 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5771 .large_lock_type = 0, 5772 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5773 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5774 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5775 .header_size = sizeof(struct smb2_hdr), 5776 .header_preamble_size = 0, 5777 .max_header_size = MAX_SMB2_HDR_SIZE, 5778 .read_rsp_size = sizeof(struct smb2_read_rsp), 5779 .lock_cmd = SMB2_LOCK, 5780 .cap_unix = 0, 5781 .cap_nt_find = SMB2_NT_FIND, 5782 .cap_large_files = SMB2_LARGE_FILES, 5783 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5784 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5785 .create_lease_size = sizeof(struct create_lease), 5786 }; 5787 5788 struct smb_version_values smb3any_values = { 5789 .version_string = SMB3ANY_VERSION_STRING, 5790 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5791 .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, 5792 .large_lock_type = 0, 5793 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5794 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5795 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5796 .header_size = sizeof(struct smb2_hdr), 5797 .header_preamble_size = 0, 5798 .max_header_size = MAX_SMB2_HDR_SIZE, 5799 .read_rsp_size = sizeof(struct smb2_read_rsp), 5800 .lock_cmd = SMB2_LOCK, 5801 .cap_unix = 0, 5802 .cap_nt_find = SMB2_NT_FIND, 5803 .cap_large_files = SMB2_LARGE_FILES, 5804 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5805 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5806 .create_lease_size = sizeof(struct create_lease_v2), 5807 }; 5808 5809 struct smb_version_values smbdefault_values = { 5810 .version_string = SMBDEFAULT_VERSION_STRING, 5811 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5812 .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, 5813 .large_lock_type = 0, 5814 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5815 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5816 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5817 .header_size = sizeof(struct smb2_hdr), 5818 .header_preamble_size = 0, 5819 .max_header_size = MAX_SMB2_HDR_SIZE, 5820 .read_rsp_size = sizeof(struct smb2_read_rsp), 5821 .lock_cmd = SMB2_LOCK, 5822 .cap_unix = 0, 5823 .cap_nt_find = SMB2_NT_FIND, 5824 .cap_large_files = SMB2_LARGE_FILES, 5825 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5826 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5827 .create_lease_size = sizeof(struct create_lease_v2), 5828 }; 5829 5830 struct smb_version_values smb30_values = { 5831 .version_string = SMB30_VERSION_STRING, 5832 .protocol_id = SMB30_PROT_ID, 5833 .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, 5834 .large_lock_type = 0, 5835 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5836 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5837 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5838 .header_size = sizeof(struct smb2_hdr), 5839 .header_preamble_size = 0, 5840 .max_header_size = MAX_SMB2_HDR_SIZE, 5841 .read_rsp_size = sizeof(struct smb2_read_rsp), 5842 .lock_cmd = SMB2_LOCK, 5843 .cap_unix = 0, 5844 .cap_nt_find = SMB2_NT_FIND, 5845 .cap_large_files = SMB2_LARGE_FILES, 5846 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5847 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5848 .create_lease_size = sizeof(struct create_lease_v2), 5849 }; 5850 5851 struct smb_version_values smb302_values = { 5852 .version_string = SMB302_VERSION_STRING, 5853 .protocol_id = SMB302_PROT_ID, 5854 .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, 5855 .large_lock_type = 0, 5856 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5857 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5858 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5859 .header_size = sizeof(struct smb2_hdr), 5860 .header_preamble_size = 0, 5861 .max_header_size = MAX_SMB2_HDR_SIZE, 5862 .read_rsp_size = sizeof(struct smb2_read_rsp), 5863 .lock_cmd = SMB2_LOCK, 5864 .cap_unix = 0, 5865 .cap_nt_find = SMB2_NT_FIND, 5866 .cap_large_files = SMB2_LARGE_FILES, 5867 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5868 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5869 .create_lease_size = sizeof(struct create_lease_v2), 5870 }; 5871 5872 struct smb_version_values smb311_values = { 5873 .version_string = SMB311_VERSION_STRING, 5874 .protocol_id = SMB311_PROT_ID, 5875 .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, 5876 .large_lock_type = 0, 5877 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5878 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5879 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5880 .header_size = sizeof(struct smb2_hdr), 5881 .header_preamble_size = 0, 5882 .max_header_size = MAX_SMB2_HDR_SIZE, 5883 .read_rsp_size = sizeof(struct smb2_read_rsp), 5884 .lock_cmd = SMB2_LOCK, 5885 .cap_unix = 0, 5886 .cap_nt_find = SMB2_NT_FIND, 5887 .cap_large_files = SMB2_LARGE_FILES, 5888 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5889 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5890 .create_lease_size = sizeof(struct create_lease_v2), 5891 }; 5892