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 num_padding = 8 - (len & 7); 2645 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2646 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2647 rqst->rq_nvec++; 2648 len += num_padding; 2649 } 2650 shdr->NextCommand = cpu_to_le32(len); 2651 } 2652 2653 /* 2654 * helper function for exponential backoff and check if replayable 2655 */ 2656 bool smb2_should_replay(struct cifs_tcon *tcon, 2657 int *pretries, 2658 int *pcur_sleep) 2659 { 2660 if (!pretries || !pcur_sleep) 2661 return false; 2662 2663 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2664 msleep(*pcur_sleep); 2665 (*pcur_sleep) = ((*pcur_sleep) << 1); 2666 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2667 (*pcur_sleep) = CIFS_MAX_SLEEP; 2668 return true; 2669 } 2670 2671 return false; 2672 } 2673 2674 /* 2675 * Passes the query info response back to the caller on success. 2676 * Caller need to free this with free_rsp_buf(). 2677 */ 2678 int 2679 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2680 const char *path, u32 desired_access, 2681 u32 class, u32 type, u32 output_len, 2682 struct kvec *rsp, int *buftype, 2683 struct cifs_sb_info *cifs_sb) 2684 { 2685 struct smb2_compound_vars *vars; 2686 struct cifs_ses *ses = tcon->ses; 2687 struct TCP_Server_Info *server; 2688 int flags = CIFS_CP_CREATE_CLOSE_OP; 2689 struct smb_rqst *rqst; 2690 int resp_buftype[3]; 2691 struct kvec *rsp_iov; 2692 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2693 struct cifs_open_parms oparms; 2694 struct cifs_fid fid; 2695 int rc; 2696 __le16 *utf16_path; 2697 struct cached_fid *cfid = NULL; 2698 int retries = 0, cur_sleep = 1; 2699 2700 replay_again: 2701 /* reinitialize for possible replay */ 2702 flags = CIFS_CP_CREATE_CLOSE_OP; 2703 oplock = SMB2_OPLOCK_LEVEL_NONE; 2704 server = cifs_pick_channel(ses); 2705 2706 if (!path) 2707 path = ""; 2708 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2709 if (!utf16_path) 2710 return -ENOMEM; 2711 2712 if (smb3_encryption_required(tcon)) 2713 flags |= CIFS_TRANSFORM_REQ; 2714 2715 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2716 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2717 if (!vars) { 2718 rc = -ENOMEM; 2719 goto out_free_path; 2720 } 2721 rqst = vars->rqst; 2722 rsp_iov = vars->rsp_iov; 2723 2724 /* 2725 * We can only call this for things we know are directories. 2726 */ 2727 if (!strcmp(path, "")) 2728 open_cached_dir(xid, tcon, path, cifs_sb, false, 2729 &cfid); /* cfid null if open dir failed */ 2730 2731 rqst[0].rq_iov = vars->open_iov; 2732 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2733 2734 oparms = (struct cifs_open_parms) { 2735 .tcon = tcon, 2736 .path = path, 2737 .desired_access = desired_access, 2738 .disposition = FILE_OPEN, 2739 .create_options = cifs_create_options(cifs_sb, 0), 2740 .fid = &fid, 2741 .replay = !!(retries), 2742 }; 2743 2744 rc = SMB2_open_init(tcon, server, 2745 &rqst[0], &oplock, &oparms, utf16_path); 2746 if (rc) 2747 goto qic_exit; 2748 smb2_set_next_command(tcon, &rqst[0]); 2749 2750 rqst[1].rq_iov = &vars->qi_iov; 2751 rqst[1].rq_nvec = 1; 2752 2753 if (cfid) { 2754 rc = SMB2_query_info_init(tcon, server, 2755 &rqst[1], 2756 cfid->fid.persistent_fid, 2757 cfid->fid.volatile_fid, 2758 class, type, 0, 2759 output_len, 0, 2760 NULL); 2761 } else { 2762 rc = SMB2_query_info_init(tcon, server, 2763 &rqst[1], 2764 COMPOUND_FID, 2765 COMPOUND_FID, 2766 class, type, 0, 2767 output_len, 0, 2768 NULL); 2769 } 2770 if (rc) 2771 goto qic_exit; 2772 if (!cfid) { 2773 smb2_set_next_command(tcon, &rqst[1]); 2774 smb2_set_related(&rqst[1]); 2775 } 2776 2777 rqst[2].rq_iov = &vars->close_iov; 2778 rqst[2].rq_nvec = 1; 2779 2780 rc = SMB2_close_init(tcon, server, 2781 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2782 if (rc) 2783 goto qic_exit; 2784 smb2_set_related(&rqst[2]); 2785 2786 if (retries) { 2787 if (!cfid) { 2788 smb2_set_replay(server, &rqst[0]); 2789 smb2_set_replay(server, &rqst[2]); 2790 } 2791 smb2_set_replay(server, &rqst[1]); 2792 } 2793 2794 if (cfid) { 2795 rc = compound_send_recv(xid, ses, server, 2796 flags, 1, &rqst[1], 2797 &resp_buftype[1], &rsp_iov[1]); 2798 } else { 2799 rc = compound_send_recv(xid, ses, server, 2800 flags, 3, rqst, 2801 resp_buftype, rsp_iov); 2802 } 2803 if (rc) { 2804 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2805 if (rc == -EREMCHG) { 2806 tcon->need_reconnect = true; 2807 pr_warn_once("server share %s deleted\n", 2808 tcon->tree_name); 2809 } 2810 goto qic_exit; 2811 } 2812 *rsp = rsp_iov[1]; 2813 *buftype = resp_buftype[1]; 2814 2815 qic_exit: 2816 SMB2_open_free(&rqst[0]); 2817 SMB2_query_info_free(&rqst[1]); 2818 SMB2_close_free(&rqst[2]); 2819 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2820 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2821 if (cfid) 2822 close_cached_dir(cfid); 2823 kfree(vars); 2824 out_free_path: 2825 kfree(utf16_path); 2826 2827 if (is_replayable_error(rc) && 2828 smb2_should_replay(tcon, &retries, &cur_sleep)) 2829 goto replay_again; 2830 2831 return rc; 2832 } 2833 2834 static int 2835 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2836 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2837 { 2838 struct smb2_query_info_rsp *rsp; 2839 struct smb2_fs_full_size_info *info = NULL; 2840 struct kvec rsp_iov = {NULL, 0}; 2841 int buftype = CIFS_NO_BUFFER; 2842 int rc; 2843 2844 2845 rc = smb2_query_info_compound(xid, tcon, path, 2846 FILE_READ_ATTRIBUTES, 2847 FS_FULL_SIZE_INFORMATION, 2848 SMB2_O_INFO_FILESYSTEM, 2849 sizeof(struct smb2_fs_full_size_info), 2850 &rsp_iov, &buftype, cifs_sb); 2851 if (rc) 2852 goto qfs_exit; 2853 2854 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2855 buf->f_type = SMB2_SUPER_MAGIC; 2856 info = (struct smb2_fs_full_size_info *)( 2857 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2858 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2859 le32_to_cpu(rsp->OutputBufferLength), 2860 &rsp_iov, 2861 sizeof(struct smb2_fs_full_size_info)); 2862 if (!rc) 2863 smb2_copy_fs_info_to_kstatfs(info, buf); 2864 2865 qfs_exit: 2866 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2867 free_rsp_buf(buftype, rsp_iov.iov_base); 2868 return rc; 2869 } 2870 2871 static int 2872 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2873 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2874 { 2875 int rc; 2876 __le16 *utf16_path = NULL; 2877 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2878 struct cifs_open_parms oparms; 2879 struct cifs_fid fid; 2880 2881 if (!tcon->posix_extensions) 2882 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2883 2884 oparms = (struct cifs_open_parms) { 2885 .tcon = tcon, 2886 .path = path, 2887 .desired_access = FILE_READ_ATTRIBUTES, 2888 .disposition = FILE_OPEN, 2889 .create_options = cifs_create_options(cifs_sb, 0), 2890 .fid = &fid, 2891 }; 2892 2893 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2894 if (utf16_path == NULL) 2895 return -ENOMEM; 2896 2897 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 2898 NULL, NULL); 2899 kfree(utf16_path); 2900 if (rc) 2901 return rc; 2902 2903 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2904 fid.volatile_fid, buf); 2905 buf->f_type = SMB2_SUPER_MAGIC; 2906 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2907 return rc; 2908 } 2909 2910 static bool 2911 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2912 { 2913 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2914 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2915 } 2916 2917 static int 2918 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2919 __u64 length, __u32 type, int lock, int unlock, bool wait) 2920 { 2921 if (unlock && !lock) 2922 type = SMB2_LOCKFLAG_UNLOCK; 2923 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2924 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2925 current->tgid, length, offset, type, wait); 2926 } 2927 2928 static void 2929 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2930 { 2931 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2932 } 2933 2934 static void 2935 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2936 { 2937 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2938 } 2939 2940 static void 2941 smb2_new_lease_key(struct cifs_fid *fid) 2942 { 2943 generate_random_uuid(fid->lease_key); 2944 } 2945 2946 static int 2947 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2948 const char *search_name, 2949 struct dfs_info3_param **target_nodes, 2950 unsigned int *num_of_nodes, 2951 const struct nls_table *nls_codepage, int remap) 2952 { 2953 int rc; 2954 __le16 *utf16_path = NULL; 2955 int utf16_path_len = 0; 2956 struct cifs_tcon *tcon; 2957 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2958 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2959 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2960 int retry_once = 0; 2961 2962 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2963 2964 /* 2965 * Try to use the IPC tcon, otherwise just use any 2966 */ 2967 tcon = ses->tcon_ipc; 2968 if (tcon == NULL) { 2969 spin_lock(&cifs_tcp_ses_lock); 2970 tcon = list_first_entry_or_null(&ses->tcon_list, 2971 struct cifs_tcon, 2972 tcon_list); 2973 if (tcon) { 2974 tcon->tc_count++; 2975 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2976 netfs_trace_tcon_ref_get_dfs_refer); 2977 } 2978 spin_unlock(&cifs_tcp_ses_lock); 2979 } 2980 2981 if (tcon == NULL) { 2982 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2983 ses); 2984 rc = -ENOTCONN; 2985 goto out; 2986 } 2987 2988 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2989 &utf16_path_len, 2990 nls_codepage, remap); 2991 if (!utf16_path) { 2992 rc = -ENOMEM; 2993 goto out; 2994 } 2995 2996 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2997 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2998 if (!dfs_req) { 2999 rc = -ENOMEM; 3000 goto out; 3001 } 3002 3003 /* Highest DFS referral version understood */ 3004 dfs_req->MaxReferralLevel = DFS_VERSION; 3005 3006 /* Path to resolve in an UTF-16 null-terminated string */ 3007 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 3008 3009 for (;;) { 3010 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 3011 FSCTL_DFS_GET_REFERRALS, 3012 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 3013 (char **)&dfs_rsp, &dfs_rsp_size); 3014 if (fatal_signal_pending(current)) { 3015 rc = -EINTR; 3016 break; 3017 } 3018 if (!is_retryable_error(rc) || retry_once++) 3019 break; 3020 usleep_range(512, 2048); 3021 } 3022 3023 if (!rc && !dfs_rsp) 3024 rc = -EIO; 3025 if (rc) { 3026 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 3027 cifs_tcon_dbg(FYI, "%s: ioctl error: rc=%d\n", __func__, rc); 3028 goto out; 3029 } 3030 3031 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 3032 num_of_nodes, target_nodes, 3033 nls_codepage, remap, search_name, 3034 true /* is_unicode */); 3035 if (rc && rc != -ENOENT) { 3036 cifs_tcon_dbg(VFS, "%s: failed to parse DFS referral %s: %d\n", 3037 __func__, search_name, rc); 3038 } 3039 3040 out: 3041 if (tcon && !tcon->ipc) { 3042 /* ipc tcons are not refcounted */ 3043 spin_lock(&cifs_tcp_ses_lock); 3044 tcon->tc_count--; 3045 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3046 netfs_trace_tcon_ref_dec_dfs_refer); 3047 /* tc_count can never go negative */ 3048 WARN_ON(tcon->tc_count < 0); 3049 spin_unlock(&cifs_tcp_ses_lock); 3050 } 3051 kfree(utf16_path); 3052 kfree(dfs_req); 3053 kfree(dfs_rsp); 3054 return rc; 3055 } 3056 3057 static struct smb_ntsd * 3058 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3059 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3060 { 3061 struct smb_ntsd *pntsd = NULL; 3062 unsigned int xid; 3063 int rc = -EOPNOTSUPP; 3064 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3065 3066 if (IS_ERR(tlink)) 3067 return ERR_CAST(tlink); 3068 3069 xid = get_xid(); 3070 cifs_dbg(FYI, "trying to get acl\n"); 3071 3072 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3073 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3074 info); 3075 free_xid(xid); 3076 3077 cifs_put_tlink(tlink); 3078 3079 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3080 if (rc) 3081 return ERR_PTR(rc); 3082 return pntsd; 3083 3084 } 3085 3086 static struct smb_ntsd * 3087 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3088 const char *path, u32 *pacllen, u32 info) 3089 { 3090 struct smb_ntsd *pntsd = NULL; 3091 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3092 unsigned int xid; 3093 int rc; 3094 struct cifs_tcon *tcon; 3095 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3096 struct cifs_fid fid; 3097 struct cifs_open_parms oparms; 3098 __le16 *utf16_path; 3099 3100 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3101 if (IS_ERR(tlink)) 3102 return ERR_CAST(tlink); 3103 3104 tcon = tlink_tcon(tlink); 3105 xid = get_xid(); 3106 3107 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3108 if (!utf16_path) { 3109 rc = -ENOMEM; 3110 free_xid(xid); 3111 return ERR_PTR(rc); 3112 } 3113 3114 oparms = (struct cifs_open_parms) { 3115 .tcon = tcon, 3116 .path = path, 3117 .desired_access = READ_CONTROL, 3118 .disposition = FILE_OPEN, 3119 /* 3120 * When querying an ACL, even if the file is a symlink 3121 * we want to open the source not the target, and so 3122 * the protocol requires that the client specify this 3123 * flag when opening a reparse point 3124 */ 3125 .create_options = cifs_create_options(cifs_sb, 0) | 3126 OPEN_REPARSE_POINT, 3127 .fid = &fid, 3128 }; 3129 3130 if (info & SACL_SECINFO) 3131 oparms.desired_access |= SYSTEM_SECURITY; 3132 3133 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3134 NULL); 3135 kfree(utf16_path); 3136 if (!rc) { 3137 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3138 fid.volatile_fid, (void **)&pntsd, pacllen, 3139 info); 3140 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3141 } 3142 3143 cifs_put_tlink(tlink); 3144 free_xid(xid); 3145 3146 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3147 if (rc) 3148 return ERR_PTR(rc); 3149 return pntsd; 3150 } 3151 3152 static int 3153 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, 3154 struct inode *inode, const char *path, int aclflag) 3155 { 3156 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3157 unsigned int xid; 3158 int rc, access_flags = 0; 3159 struct cifs_tcon *tcon; 3160 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3161 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3162 struct cifs_fid fid; 3163 struct cifs_open_parms oparms; 3164 __le16 *utf16_path; 3165 3166 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3167 if (IS_ERR(tlink)) 3168 return PTR_ERR(tlink); 3169 3170 tcon = tlink_tcon(tlink); 3171 xid = get_xid(); 3172 3173 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3174 access_flags |= WRITE_OWNER; 3175 if (aclflag & CIFS_ACL_SACL) 3176 access_flags |= SYSTEM_SECURITY; 3177 if (aclflag & CIFS_ACL_DACL) 3178 access_flags |= WRITE_DAC; 3179 3180 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3181 if (!utf16_path) { 3182 rc = -ENOMEM; 3183 free_xid(xid); 3184 return rc; 3185 } 3186 3187 oparms = (struct cifs_open_parms) { 3188 .tcon = tcon, 3189 .desired_access = access_flags, 3190 .create_options = cifs_create_options(cifs_sb, 0), 3191 .disposition = FILE_OPEN, 3192 .path = path, 3193 .fid = &fid, 3194 }; 3195 3196 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3197 NULL, NULL); 3198 kfree(utf16_path); 3199 if (!rc) { 3200 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3201 fid.volatile_fid, pnntsd, acllen, aclflag); 3202 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3203 } 3204 3205 cifs_put_tlink(tlink); 3206 free_xid(xid); 3207 return rc; 3208 } 3209 3210 /* Retrieve an ACL from the server */ 3211 static struct smb_ntsd * 3212 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3213 struct inode *inode, const char *path, 3214 u32 *pacllen, u32 info) 3215 { 3216 struct smb_ntsd *pntsd = NULL; 3217 struct cifsFileInfo *open_file = NULL; 3218 3219 if (inode && !(info & SACL_SECINFO)) 3220 open_file = find_readable_file(CIFS_I(inode), true); 3221 if (!open_file || (info & SACL_SECINFO)) 3222 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3223 3224 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3225 cifsFileInfo_put(open_file); 3226 return pntsd; 3227 } 3228 3229 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3230 loff_t offset, loff_t len, unsigned int xid) 3231 { 3232 struct cifsFileInfo *cfile = file->private_data; 3233 struct file_zero_data_information fsctl_buf; 3234 3235 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3236 3237 fsctl_buf.FileOffset = cpu_to_le64(offset); 3238 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3239 3240 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3241 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3242 (char *)&fsctl_buf, 3243 sizeof(struct file_zero_data_information), 3244 0, NULL, NULL); 3245 } 3246 3247 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3248 unsigned long long offset, unsigned long long len, 3249 bool keep_size) 3250 { 3251 struct cifs_ses *ses = tcon->ses; 3252 struct inode *inode = file_inode(file); 3253 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3254 struct cifsFileInfo *cfile = file->private_data; 3255 struct netfs_inode *ictx = netfs_inode(inode); 3256 unsigned long long i_size, new_size, remote_size; 3257 long rc; 3258 unsigned int xid; 3259 3260 xid = get_xid(); 3261 3262 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3263 ses->Suid, offset, len); 3264 3265 inode_lock(inode); 3266 filemap_invalidate_lock(inode->i_mapping); 3267 3268 i_size = i_size_read(inode); 3269 remote_size = ictx->remote_i_size; 3270 if (offset + len >= remote_size && offset < i_size) { 3271 unsigned long long top = umin(offset + len, i_size); 3272 3273 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3274 if (rc < 0) 3275 goto zero_range_exit; 3276 } 3277 3278 /* 3279 * We zero the range through ioctl, so we need remove the page caches 3280 * first, otherwise the data may be inconsistent with the server. 3281 */ 3282 truncate_pagecache_range(inode, offset, offset + len - 1); 3283 3284 /* if file not oplocked can't be sure whether asking to extend size */ 3285 rc = -EOPNOTSUPP; 3286 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3287 goto zero_range_exit; 3288 3289 rc = smb3_zero_data(file, tcon, offset, len, xid); 3290 if (rc < 0) 3291 goto zero_range_exit; 3292 3293 /* 3294 * do we also need to change the size of the file? 3295 */ 3296 new_size = offset + len; 3297 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3298 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3299 cfile->fid.volatile_fid, cfile->pid, new_size); 3300 if (rc >= 0) { 3301 truncate_setsize(inode, new_size); 3302 netfs_resize_file(&cifsi->netfs, new_size, true); 3303 if (offset < cifsi->netfs.zero_point) 3304 cifsi->netfs.zero_point = offset; 3305 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3306 } 3307 } 3308 3309 zero_range_exit: 3310 filemap_invalidate_unlock(inode->i_mapping); 3311 inode_unlock(inode); 3312 free_xid(xid); 3313 if (rc) 3314 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3315 ses->Suid, offset, len, rc); 3316 else 3317 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3318 ses->Suid, offset, len); 3319 return rc; 3320 } 3321 3322 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3323 loff_t offset, loff_t len) 3324 { 3325 struct inode *inode = file_inode(file); 3326 struct cifsFileInfo *cfile = file->private_data; 3327 struct file_zero_data_information fsctl_buf; 3328 unsigned long long end = offset + len, i_size, remote_i_size; 3329 long rc; 3330 unsigned int xid; 3331 __u8 set_sparse = 1; 3332 3333 xid = get_xid(); 3334 3335 inode_lock(inode); 3336 /* Need to make file sparse, if not already, before freeing range. */ 3337 /* Consider adding equivalent for compressed since it could also work */ 3338 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3339 rc = -EOPNOTSUPP; 3340 goto out; 3341 } 3342 3343 filemap_invalidate_lock(inode->i_mapping); 3344 /* 3345 * We implement the punch hole through ioctl, so we need remove the page 3346 * caches first, otherwise the data may be inconsistent with the server. 3347 */ 3348 truncate_pagecache_range(inode, offset, offset + len - 1); 3349 3350 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3351 3352 fsctl_buf.FileOffset = cpu_to_le64(offset); 3353 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3354 3355 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3356 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3357 (char *)&fsctl_buf, 3358 sizeof(struct file_zero_data_information), 3359 CIFSMaxBufSize, NULL, NULL); 3360 3361 if (rc) 3362 goto unlock; 3363 3364 /* If there's dirty data in the buffer that would extend the EOF if it 3365 * were written, then we need to move the EOF marker over to the lower 3366 * of the high end of the hole and the proposed EOF. The problem is 3367 * that we locally hole-punch the tail of the dirty data, the proposed 3368 * EOF update will end up in the wrong place. 3369 */ 3370 i_size = i_size_read(inode); 3371 remote_i_size = netfs_inode(inode)->remote_i_size; 3372 if (end > remote_i_size && i_size > remote_i_size) { 3373 unsigned long long extend_to = umin(end, i_size); 3374 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3375 cfile->fid.volatile_fid, cfile->pid, extend_to); 3376 if (rc >= 0) 3377 netfs_inode(inode)->remote_i_size = extend_to; 3378 } 3379 3380 unlock: 3381 filemap_invalidate_unlock(inode->i_mapping); 3382 out: 3383 inode_unlock(inode); 3384 free_xid(xid); 3385 return rc; 3386 } 3387 3388 static int smb3_simple_fallocate_write_range(unsigned int xid, 3389 struct cifs_tcon *tcon, 3390 struct cifsFileInfo *cfile, 3391 loff_t off, loff_t len, 3392 char *buf) 3393 { 3394 struct cifs_io_parms io_parms = {0}; 3395 int nbytes; 3396 int rc = 0; 3397 struct kvec iov[2]; 3398 3399 io_parms.netfid = cfile->fid.netfid; 3400 io_parms.pid = current->tgid; 3401 io_parms.tcon = tcon; 3402 io_parms.persistent_fid = cfile->fid.persistent_fid; 3403 io_parms.volatile_fid = cfile->fid.volatile_fid; 3404 3405 while (len) { 3406 io_parms.offset = off; 3407 io_parms.length = len; 3408 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3409 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3410 /* iov[0] is reserved for smb header */ 3411 iov[1].iov_base = buf; 3412 iov[1].iov_len = io_parms.length; 3413 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3414 if (rc) 3415 break; 3416 if (nbytes > len) 3417 return -EINVAL; 3418 buf += nbytes; 3419 off += nbytes; 3420 len -= nbytes; 3421 } 3422 return rc; 3423 } 3424 3425 static int smb3_simple_fallocate_range(unsigned int xid, 3426 struct cifs_tcon *tcon, 3427 struct cifsFileInfo *cfile, 3428 loff_t off, loff_t len) 3429 { 3430 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3431 u32 out_data_len; 3432 char *buf = NULL; 3433 loff_t l; 3434 int rc; 3435 3436 in_data.file_offset = cpu_to_le64(off); 3437 in_data.length = cpu_to_le64(len); 3438 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3439 cfile->fid.volatile_fid, 3440 FSCTL_QUERY_ALLOCATED_RANGES, 3441 (char *)&in_data, sizeof(in_data), 3442 1024 * sizeof(struct file_allocated_range_buffer), 3443 (char **)&out_data, &out_data_len); 3444 if (rc) 3445 goto out; 3446 3447 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3448 if (buf == NULL) { 3449 rc = -ENOMEM; 3450 goto out; 3451 } 3452 3453 tmp_data = out_data; 3454 while (len) { 3455 /* 3456 * The rest of the region is unmapped so write it all. 3457 */ 3458 if (out_data_len == 0) { 3459 rc = smb3_simple_fallocate_write_range(xid, tcon, 3460 cfile, off, len, buf); 3461 goto out; 3462 } 3463 3464 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3465 rc = -EINVAL; 3466 goto out; 3467 } 3468 3469 if (off < le64_to_cpu(tmp_data->file_offset)) { 3470 /* 3471 * We are at a hole. Write until the end of the region 3472 * or until the next allocated data, 3473 * whichever comes next. 3474 */ 3475 l = le64_to_cpu(tmp_data->file_offset) - off; 3476 if (len < l) 3477 l = len; 3478 rc = smb3_simple_fallocate_write_range(xid, tcon, 3479 cfile, off, l, buf); 3480 if (rc) 3481 goto out; 3482 off = off + l; 3483 len = len - l; 3484 if (len == 0) 3485 goto out; 3486 } 3487 /* 3488 * We are at a section of allocated data, just skip forward 3489 * until the end of the data or the end of the region 3490 * we are supposed to fallocate, whichever comes first. 3491 */ 3492 l = le64_to_cpu(tmp_data->length); 3493 if (len < l) 3494 l = len; 3495 off += l; 3496 len -= l; 3497 3498 tmp_data = &tmp_data[1]; 3499 out_data_len -= sizeof(struct file_allocated_range_buffer); 3500 } 3501 3502 out: 3503 kfree(out_data); 3504 kfree(buf); 3505 return rc; 3506 } 3507 3508 3509 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3510 loff_t off, loff_t len, bool keep_size) 3511 { 3512 struct inode *inode; 3513 struct cifsInodeInfo *cifsi; 3514 struct cifsFileInfo *cfile = file->private_data; 3515 long rc = -EOPNOTSUPP; 3516 unsigned int xid; 3517 loff_t new_eof; 3518 3519 xid = get_xid(); 3520 3521 inode = d_inode(cfile->dentry); 3522 cifsi = CIFS_I(inode); 3523 3524 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3525 tcon->ses->Suid, off, len); 3526 /* if file not oplocked can't be sure whether asking to extend size */ 3527 if (!CIFS_CACHE_READ(cifsi)) 3528 if (keep_size == false) { 3529 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3530 tcon->tid, tcon->ses->Suid, off, len, rc); 3531 free_xid(xid); 3532 return rc; 3533 } 3534 3535 /* 3536 * Extending the file 3537 */ 3538 if ((keep_size == false) && i_size_read(inode) < off + len) { 3539 rc = inode_newsize_ok(inode, off + len); 3540 if (rc) 3541 goto out; 3542 3543 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3544 smb2_set_sparse(xid, tcon, cfile, inode, false); 3545 3546 new_eof = off + len; 3547 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3548 cfile->fid.volatile_fid, cfile->pid, new_eof); 3549 if (rc == 0) { 3550 netfs_resize_file(&cifsi->netfs, new_eof, true); 3551 cifs_setsize(inode, new_eof); 3552 } 3553 goto out; 3554 } 3555 3556 /* 3557 * Files are non-sparse by default so falloc may be a no-op 3558 * Must check if file sparse. If not sparse, and since we are not 3559 * extending then no need to do anything since file already allocated 3560 */ 3561 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3562 rc = 0; 3563 goto out; 3564 } 3565 3566 if (keep_size == true) { 3567 /* 3568 * We can not preallocate pages beyond the end of the file 3569 * in SMB2 3570 */ 3571 if (off >= i_size_read(inode)) { 3572 rc = 0; 3573 goto out; 3574 } 3575 /* 3576 * For fallocates that are partially beyond the end of file, 3577 * clamp len so we only fallocate up to the end of file. 3578 */ 3579 if (off + len > i_size_read(inode)) { 3580 len = i_size_read(inode) - off; 3581 } 3582 } 3583 3584 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3585 /* 3586 * At this point, we are trying to fallocate an internal 3587 * regions of a sparse file. Since smb2 does not have a 3588 * fallocate command we have two options on how to emulate this. 3589 * We can either turn the entire file to become non-sparse 3590 * which we only do if the fallocate is for virtually 3591 * the whole file, or we can overwrite the region with zeroes 3592 * using SMB2_write, which could be prohibitevly expensive 3593 * if len is large. 3594 */ 3595 /* 3596 * We are only trying to fallocate a small region so 3597 * just write it with zero. 3598 */ 3599 if (len <= 1024 * 1024) { 3600 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3601 off, len); 3602 goto out; 3603 } 3604 3605 /* 3606 * Check if falloc starts within first few pages of file 3607 * and ends within a few pages of the end of file to 3608 * ensure that most of file is being forced to be 3609 * fallocated now. If so then setting whole file sparse 3610 * ie potentially making a few extra pages at the beginning 3611 * or end of the file non-sparse via set_sparse is harmless. 3612 */ 3613 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3614 rc = -EOPNOTSUPP; 3615 goto out; 3616 } 3617 } 3618 3619 smb2_set_sparse(xid, tcon, cfile, inode, false); 3620 rc = 0; 3621 3622 out: 3623 if (rc) 3624 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3625 tcon->ses->Suid, off, len, rc); 3626 else 3627 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3628 tcon->ses->Suid, off, len); 3629 3630 free_xid(xid); 3631 return rc; 3632 } 3633 3634 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3635 loff_t off, loff_t len) 3636 { 3637 int rc; 3638 unsigned int xid; 3639 struct inode *inode = file_inode(file); 3640 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3641 struct cifsFileInfo *cfile = file->private_data; 3642 struct netfs_inode *ictx = &cifsi->netfs; 3643 loff_t old_eof, new_eof; 3644 3645 xid = get_xid(); 3646 3647 inode_lock(inode); 3648 3649 old_eof = i_size_read(inode); 3650 if ((off >= old_eof) || 3651 off + len >= old_eof) { 3652 rc = -EINVAL; 3653 goto out; 3654 } 3655 3656 filemap_invalidate_lock(inode->i_mapping); 3657 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3658 if (rc < 0) 3659 goto out_2; 3660 3661 truncate_pagecache_range(inode, off, old_eof); 3662 ictx->zero_point = old_eof; 3663 3664 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3665 old_eof - off - len, off); 3666 if (rc < 0) 3667 goto out_2; 3668 3669 new_eof = old_eof - len; 3670 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3671 cfile->fid.volatile_fid, cfile->pid, new_eof); 3672 if (rc < 0) 3673 goto out_2; 3674 3675 rc = 0; 3676 3677 truncate_setsize(inode, new_eof); 3678 netfs_resize_file(&cifsi->netfs, new_eof, true); 3679 ictx->zero_point = new_eof; 3680 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3681 out_2: 3682 filemap_invalidate_unlock(inode->i_mapping); 3683 out: 3684 inode_unlock(inode); 3685 free_xid(xid); 3686 return rc; 3687 } 3688 3689 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3690 loff_t off, loff_t len) 3691 { 3692 int rc; 3693 unsigned int xid; 3694 struct cifsFileInfo *cfile = file->private_data; 3695 struct inode *inode = file_inode(file); 3696 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3697 __u64 count, old_eof, new_eof; 3698 3699 xid = get_xid(); 3700 3701 inode_lock(inode); 3702 3703 old_eof = i_size_read(inode); 3704 if (off >= old_eof) { 3705 rc = -EINVAL; 3706 goto out; 3707 } 3708 3709 count = old_eof - off; 3710 new_eof = old_eof + len; 3711 3712 filemap_invalidate_lock(inode->i_mapping); 3713 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3714 if (rc < 0) 3715 goto out_2; 3716 truncate_pagecache_range(inode, off, old_eof); 3717 3718 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3719 cfile->fid.volatile_fid, cfile->pid, new_eof); 3720 if (rc < 0) 3721 goto out_2; 3722 3723 truncate_setsize(inode, new_eof); 3724 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3725 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3726 3727 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3728 if (rc < 0) 3729 goto out_2; 3730 cifsi->netfs.zero_point = new_eof; 3731 3732 rc = smb3_zero_data(file, tcon, off, len, xid); 3733 if (rc < 0) 3734 goto out_2; 3735 3736 rc = 0; 3737 out_2: 3738 filemap_invalidate_unlock(inode->i_mapping); 3739 out: 3740 inode_unlock(inode); 3741 free_xid(xid); 3742 return rc; 3743 } 3744 3745 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3746 { 3747 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3748 struct cifsInodeInfo *cifsi; 3749 struct inode *inode; 3750 int rc = 0; 3751 struct file_allocated_range_buffer in_data, *out_data = NULL; 3752 u32 out_data_len; 3753 unsigned int xid; 3754 3755 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3756 return generic_file_llseek(file, offset, whence); 3757 3758 inode = d_inode(cfile->dentry); 3759 cifsi = CIFS_I(inode); 3760 3761 if (offset < 0 || offset >= i_size_read(inode)) 3762 return -ENXIO; 3763 3764 xid = get_xid(); 3765 /* 3766 * We need to be sure that all dirty pages are written as they 3767 * might fill holes on the server. 3768 * Note that we also MUST flush any written pages since at least 3769 * some servers (Windows2016) will not reflect recent writes in 3770 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3771 */ 3772 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3773 if (wrcfile) { 3774 filemap_write_and_wait(inode->i_mapping); 3775 smb2_flush_file(xid, tcon, &wrcfile->fid); 3776 cifsFileInfo_put(wrcfile); 3777 } 3778 3779 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3780 if (whence == SEEK_HOLE) 3781 offset = i_size_read(inode); 3782 goto lseek_exit; 3783 } 3784 3785 in_data.file_offset = cpu_to_le64(offset); 3786 in_data.length = cpu_to_le64(i_size_read(inode)); 3787 3788 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3789 cfile->fid.volatile_fid, 3790 FSCTL_QUERY_ALLOCATED_RANGES, 3791 (char *)&in_data, sizeof(in_data), 3792 sizeof(struct file_allocated_range_buffer), 3793 (char **)&out_data, &out_data_len); 3794 if (rc == -E2BIG) 3795 rc = 0; 3796 if (rc) 3797 goto lseek_exit; 3798 3799 if (whence == SEEK_HOLE && out_data_len == 0) 3800 goto lseek_exit; 3801 3802 if (whence == SEEK_DATA && out_data_len == 0) { 3803 rc = -ENXIO; 3804 goto lseek_exit; 3805 } 3806 3807 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3808 rc = -EINVAL; 3809 goto lseek_exit; 3810 } 3811 if (whence == SEEK_DATA) { 3812 offset = le64_to_cpu(out_data->file_offset); 3813 goto lseek_exit; 3814 } 3815 if (offset < le64_to_cpu(out_data->file_offset)) 3816 goto lseek_exit; 3817 3818 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3819 3820 lseek_exit: 3821 free_xid(xid); 3822 kfree(out_data); 3823 if (!rc) 3824 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3825 else 3826 return rc; 3827 } 3828 3829 static int smb3_fiemap(struct cifs_tcon *tcon, 3830 struct cifsFileInfo *cfile, 3831 struct fiemap_extent_info *fei, u64 start, u64 len) 3832 { 3833 unsigned int xid; 3834 struct file_allocated_range_buffer in_data, *out_data; 3835 u32 out_data_len; 3836 int i, num, rc, flags, last_blob; 3837 u64 next; 3838 3839 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3840 if (rc) 3841 return rc; 3842 3843 xid = get_xid(); 3844 again: 3845 in_data.file_offset = cpu_to_le64(start); 3846 in_data.length = cpu_to_le64(len); 3847 3848 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3849 cfile->fid.volatile_fid, 3850 FSCTL_QUERY_ALLOCATED_RANGES, 3851 (char *)&in_data, sizeof(in_data), 3852 1024 * sizeof(struct file_allocated_range_buffer), 3853 (char **)&out_data, &out_data_len); 3854 if (rc == -E2BIG) { 3855 last_blob = 0; 3856 rc = 0; 3857 } else 3858 last_blob = 1; 3859 if (rc) 3860 goto out; 3861 3862 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3863 rc = -EINVAL; 3864 goto out; 3865 } 3866 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3867 rc = -EINVAL; 3868 goto out; 3869 } 3870 3871 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3872 for (i = 0; i < num; i++) { 3873 flags = 0; 3874 if (i == num - 1 && last_blob) 3875 flags |= FIEMAP_EXTENT_LAST; 3876 3877 rc = fiemap_fill_next_extent(fei, 3878 le64_to_cpu(out_data[i].file_offset), 3879 le64_to_cpu(out_data[i].file_offset), 3880 le64_to_cpu(out_data[i].length), 3881 flags); 3882 if (rc < 0) 3883 goto out; 3884 if (rc == 1) { 3885 rc = 0; 3886 goto out; 3887 } 3888 } 3889 3890 if (!last_blob) { 3891 next = le64_to_cpu(out_data[num - 1].file_offset) + 3892 le64_to_cpu(out_data[num - 1].length); 3893 len = len - (next - start); 3894 start = next; 3895 goto again; 3896 } 3897 3898 out: 3899 free_xid(xid); 3900 kfree(out_data); 3901 return rc; 3902 } 3903 3904 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3905 loff_t off, loff_t len) 3906 { 3907 /* KEEP_SIZE already checked for by do_fallocate */ 3908 if (mode & FALLOC_FL_PUNCH_HOLE) 3909 return smb3_punch_hole(file, tcon, off, len); 3910 else if (mode & FALLOC_FL_ZERO_RANGE) { 3911 if (mode & FALLOC_FL_KEEP_SIZE) 3912 return smb3_zero_range(file, tcon, off, len, true); 3913 return smb3_zero_range(file, tcon, off, len, false); 3914 } else if (mode == FALLOC_FL_KEEP_SIZE) 3915 return smb3_simple_falloc(file, tcon, off, len, true); 3916 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3917 return smb3_collapse_range(file, tcon, off, len); 3918 else if (mode == FALLOC_FL_INSERT_RANGE) 3919 return smb3_insert_range(file, tcon, off, len); 3920 else if (mode == 0) 3921 return smb3_simple_falloc(file, tcon, off, len, false); 3922 3923 return -EOPNOTSUPP; 3924 } 3925 3926 static void 3927 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3928 struct cifsInodeInfo *cinode, __u32 oplock, 3929 __u16 epoch, bool *purge_cache) 3930 { 3931 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3932 } 3933 3934 static void 3935 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3936 __u16 epoch, bool *purge_cache); 3937 3938 static void 3939 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3940 struct cifsInodeInfo *cinode, __u32 oplock, 3941 __u16 epoch, bool *purge_cache) 3942 { 3943 unsigned int old_state = cinode->oplock; 3944 __u16 old_epoch = cinode->epoch; 3945 unsigned int new_state; 3946 3947 if (epoch > old_epoch) { 3948 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3949 cinode->epoch = epoch; 3950 } 3951 3952 new_state = cinode->oplock; 3953 *purge_cache = false; 3954 3955 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3956 (new_state & CIFS_CACHE_READ_FLG) == 0) 3957 *purge_cache = true; 3958 else if (old_state == new_state && (epoch - old_epoch > 1)) 3959 *purge_cache = true; 3960 } 3961 3962 static void 3963 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3964 __u16 epoch, bool *purge_cache) 3965 { 3966 oplock &= 0xFF; 3967 cinode->lease_granted = false; 3968 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3969 return; 3970 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3971 cinode->oplock = CIFS_CACHE_RHW_FLG; 3972 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3973 &cinode->netfs.inode); 3974 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3975 cinode->oplock = CIFS_CACHE_RW_FLG; 3976 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3977 &cinode->netfs.inode); 3978 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3979 cinode->oplock = CIFS_CACHE_READ_FLG; 3980 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3981 &cinode->netfs.inode); 3982 } else 3983 cinode->oplock = 0; 3984 } 3985 3986 static void 3987 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3988 __u16 epoch, bool *purge_cache) 3989 { 3990 char message[5] = {0}; 3991 unsigned int new_oplock = 0; 3992 3993 oplock &= 0xFF; 3994 cinode->lease_granted = true; 3995 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3996 return; 3997 3998 /* Check if the server granted an oplock rather than a lease */ 3999 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4000 return smb2_set_oplock_level(cinode, oplock, epoch, 4001 purge_cache); 4002 4003 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4004 new_oplock |= CIFS_CACHE_READ_FLG; 4005 strcat(message, "R"); 4006 } 4007 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4008 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4009 strcat(message, "H"); 4010 } 4011 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4012 new_oplock |= CIFS_CACHE_WRITE_FLG; 4013 strcat(message, "W"); 4014 } 4015 if (!new_oplock) 4016 strscpy(message, "None"); 4017 4018 cinode->oplock = new_oplock; 4019 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4020 &cinode->netfs.inode); 4021 } 4022 4023 static void 4024 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4025 __u16 epoch, bool *purge_cache) 4026 { 4027 unsigned int old_oplock = cinode->oplock; 4028 4029 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4030 4031 if (purge_cache) { 4032 *purge_cache = false; 4033 if (old_oplock == CIFS_CACHE_READ_FLG) { 4034 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4035 (epoch - cinode->epoch > 0)) 4036 *purge_cache = true; 4037 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4038 (epoch - cinode->epoch > 1)) 4039 *purge_cache = true; 4040 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4041 (epoch - cinode->epoch > 1)) 4042 *purge_cache = true; 4043 else if (cinode->oplock == 0 && 4044 (epoch - cinode->epoch > 0)) 4045 *purge_cache = true; 4046 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4047 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4048 (epoch - cinode->epoch > 0)) 4049 *purge_cache = true; 4050 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4051 (epoch - cinode->epoch > 1)) 4052 *purge_cache = true; 4053 } 4054 cinode->epoch = epoch; 4055 } 4056 } 4057 4058 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4059 static bool 4060 smb2_is_read_op(__u32 oplock) 4061 { 4062 return oplock == SMB2_OPLOCK_LEVEL_II; 4063 } 4064 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4065 4066 static bool 4067 smb21_is_read_op(__u32 oplock) 4068 { 4069 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4070 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4071 } 4072 4073 static __le32 4074 map_oplock_to_lease(u8 oplock) 4075 { 4076 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4077 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4078 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4079 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4080 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4081 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4082 SMB2_LEASE_WRITE_CACHING_LE; 4083 return 0; 4084 } 4085 4086 static char * 4087 smb2_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4088 { 4089 struct create_lease *buf; 4090 4091 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4092 if (!buf) 4093 return NULL; 4094 4095 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4096 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4097 4098 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4099 (struct create_lease, lcontext)); 4100 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4101 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4102 (struct create_lease, Name)); 4103 buf->ccontext.NameLength = cpu_to_le16(4); 4104 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4105 buf->Name[0] = 'R'; 4106 buf->Name[1] = 'q'; 4107 buf->Name[2] = 'L'; 4108 buf->Name[3] = 's'; 4109 return (char *)buf; 4110 } 4111 4112 static char * 4113 smb3_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4114 { 4115 struct create_lease_v2 *buf; 4116 4117 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4118 if (!buf) 4119 return NULL; 4120 4121 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4122 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4123 buf->lcontext.LeaseFlags = flags; 4124 if (flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 4125 memcpy(&buf->lcontext.ParentLeaseKey, parent_lease_key, SMB2_LEASE_KEY_SIZE); 4126 4127 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4128 (struct create_lease_v2, lcontext)); 4129 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4130 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4131 (struct create_lease_v2, Name)); 4132 buf->ccontext.NameLength = cpu_to_le16(4); 4133 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4134 buf->Name[0] = 'R'; 4135 buf->Name[1] = 'q'; 4136 buf->Name[2] = 'L'; 4137 buf->Name[3] = 's'; 4138 return (char *)buf; 4139 } 4140 4141 static __u8 4142 smb2_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4143 { 4144 struct create_lease *lc = (struct create_lease *)buf; 4145 4146 *epoch = 0; /* not used */ 4147 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4148 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4149 return le32_to_cpu(lc->lcontext.LeaseState); 4150 } 4151 4152 static __u8 4153 smb3_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4154 { 4155 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4156 4157 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4158 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4159 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4160 if (lease_key) 4161 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4162 return le32_to_cpu(lc->lcontext.LeaseState); 4163 } 4164 4165 static unsigned int 4166 smb2_wp_retry_size(struct inode *inode) 4167 { 4168 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4169 SMB2_MAX_BUFFER_SIZE); 4170 } 4171 4172 static bool 4173 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4174 { 4175 return !cfile->invalidHandle; 4176 } 4177 4178 static void 4179 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4180 struct smb_rqst *old_rq, __le16 cipher_type) 4181 { 4182 struct smb2_hdr *shdr = 4183 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4184 4185 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4186 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4187 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4188 tr_hdr->Flags = cpu_to_le16(0x01); 4189 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4190 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4191 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4192 else 4193 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4194 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4195 } 4196 4197 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4198 int num_rqst, const u8 *sig, u8 **iv, 4199 struct aead_request **req, struct sg_table *sgt, 4200 unsigned int *num_sgs, size_t *sensitive_size) 4201 { 4202 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4203 unsigned int iv_size = crypto_aead_ivsize(tfm); 4204 unsigned int len; 4205 u8 *p; 4206 4207 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4208 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4209 return ERR_PTR(*num_sgs); 4210 4211 len = iv_size; 4212 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4213 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4214 len += req_size; 4215 len = ALIGN(len, __alignof__(struct scatterlist)); 4216 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4217 *sensitive_size = len; 4218 4219 p = kvzalloc(len, GFP_NOFS); 4220 if (!p) 4221 return ERR_PTR(-ENOMEM); 4222 4223 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4224 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4225 crypto_tfm_ctx_alignment()); 4226 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4227 __alignof__(struct scatterlist)); 4228 return p; 4229 } 4230 4231 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4232 int num_rqst, const u8 *sig, u8 **iv, 4233 struct aead_request **req, struct scatterlist **sgl, 4234 size_t *sensitive_size) 4235 { 4236 struct sg_table sgtable = {}; 4237 unsigned int skip, num_sgs, i, j; 4238 ssize_t rc; 4239 void *p; 4240 4241 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4242 &num_sgs, sensitive_size); 4243 if (IS_ERR(p)) 4244 return ERR_CAST(p); 4245 4246 sg_init_marker(sgtable.sgl, num_sgs); 4247 4248 /* 4249 * The first rqst has a transform header where the 4250 * first 20 bytes are not part of the encrypted blob. 4251 */ 4252 skip = 20; 4253 4254 for (i = 0; i < num_rqst; i++) { 4255 struct iov_iter *iter = &rqst[i].rq_iter; 4256 size_t count = iov_iter_count(iter); 4257 4258 for (j = 0; j < rqst[i].rq_nvec; j++) { 4259 cifs_sg_set_buf(&sgtable, 4260 rqst[i].rq_iov[j].iov_base + skip, 4261 rqst[i].rq_iov[j].iov_len - skip); 4262 4263 /* See the above comment on the 'skip' assignment */ 4264 skip = 0; 4265 } 4266 sgtable.orig_nents = sgtable.nents; 4267 4268 rc = extract_iter_to_sg(iter, count, &sgtable, 4269 num_sgs - sgtable.nents, 0); 4270 iov_iter_revert(iter, rc); 4271 sgtable.orig_nents = sgtable.nents; 4272 } 4273 4274 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4275 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4276 *sgl = sgtable.sgl; 4277 return p; 4278 } 4279 4280 static int 4281 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4282 { 4283 struct TCP_Server_Info *pserver; 4284 struct cifs_ses *ses; 4285 u8 *ses_enc_key; 4286 4287 /* If server is a channel, select the primary channel */ 4288 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4289 4290 spin_lock(&cifs_tcp_ses_lock); 4291 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4292 if (ses->Suid == ses_id) { 4293 spin_lock(&ses->ses_lock); 4294 ses_enc_key = enc ? ses->smb3encryptionkey : 4295 ses->smb3decryptionkey; 4296 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4297 spin_unlock(&ses->ses_lock); 4298 spin_unlock(&cifs_tcp_ses_lock); 4299 return 0; 4300 } 4301 } 4302 spin_unlock(&cifs_tcp_ses_lock); 4303 4304 trace_smb3_ses_not_found(ses_id); 4305 4306 return -EAGAIN; 4307 } 4308 /* 4309 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4310 * iov[0] - transform header (associate data), 4311 * iov[1-N] - SMB2 header and pages - data to encrypt. 4312 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4313 * untouched. 4314 */ 4315 static int 4316 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4317 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4318 { 4319 struct smb2_transform_hdr *tr_hdr = 4320 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4321 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4322 int rc = 0; 4323 struct scatterlist *sg; 4324 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4325 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4326 struct aead_request *req; 4327 u8 *iv; 4328 DECLARE_CRYPTO_WAIT(wait); 4329 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4330 void *creq; 4331 size_t sensitive_size; 4332 4333 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4334 if (rc) { 4335 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4336 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4337 return rc; 4338 } 4339 4340 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4341 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4342 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4343 else 4344 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4345 4346 if (rc) { 4347 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4348 return rc; 4349 } 4350 4351 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4352 if (rc) { 4353 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4354 return rc; 4355 } 4356 4357 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4358 &sensitive_size); 4359 if (IS_ERR(creq)) 4360 return PTR_ERR(creq); 4361 4362 if (!enc) { 4363 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4364 crypt_len += SMB2_SIGNATURE_SIZE; 4365 } 4366 4367 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4368 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4369 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4370 else { 4371 iv[0] = 3; 4372 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4373 } 4374 4375 aead_request_set_tfm(req, tfm); 4376 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4377 aead_request_set_ad(req, assoc_data_len); 4378 4379 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4380 crypto_req_done, &wait); 4381 4382 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4383 : crypto_aead_decrypt(req), &wait); 4384 4385 if (!rc && enc) 4386 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4387 4388 kvfree_sensitive(creq, sensitive_size); 4389 return rc; 4390 } 4391 4392 /* 4393 * Clear a read buffer, discarding the folios which have the 1st mark set. 4394 */ 4395 static void cifs_clear_folioq_buffer(struct folio_queue *buffer) 4396 { 4397 struct folio_queue *folioq; 4398 4399 while ((folioq = buffer)) { 4400 for (int s = 0; s < folioq_count(folioq); s++) 4401 if (folioq_is_marked(folioq, s)) 4402 folio_put(folioq_folio(folioq, s)); 4403 buffer = folioq->next; 4404 kfree(folioq); 4405 } 4406 } 4407 4408 /* 4409 * Allocate buffer space into a folio queue. 4410 */ 4411 static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size) 4412 { 4413 struct folio_queue *buffer = NULL, *tail = NULL, *p; 4414 struct folio *folio; 4415 unsigned int slot; 4416 4417 do { 4418 if (!tail || folioq_full(tail)) { 4419 p = kmalloc(sizeof(*p), GFP_NOFS); 4420 if (!p) 4421 goto nomem; 4422 folioq_init(p, 0); 4423 if (tail) { 4424 tail->next = p; 4425 p->prev = tail; 4426 } else { 4427 buffer = p; 4428 } 4429 tail = p; 4430 } 4431 4432 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0); 4433 if (!folio) 4434 goto nomem; 4435 4436 slot = folioq_append_mark(tail, folio); 4437 size -= folioq_folio_size(tail, slot); 4438 } while (size > 0); 4439 4440 return buffer; 4441 4442 nomem: 4443 cifs_clear_folioq_buffer(buffer); 4444 return NULL; 4445 } 4446 4447 /* 4448 * Copy data from an iterator to the folios in a folio queue buffer. 4449 */ 4450 static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size, 4451 struct folio_queue *buffer) 4452 { 4453 for (; buffer; buffer = buffer->next) { 4454 for (int s = 0; s < folioq_count(buffer); s++) { 4455 struct folio *folio = folioq_folio(buffer, s); 4456 size_t part = folioq_folio_size(buffer, s); 4457 4458 part = umin(part, size); 4459 4460 if (copy_folio_from_iter(folio, 0, part, iter) != part) 4461 return false; 4462 size -= part; 4463 } 4464 } 4465 return true; 4466 } 4467 4468 void 4469 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4470 { 4471 for (int i = 0; i < num_rqst; i++) 4472 cifs_clear_folioq_buffer(rqst[i].rq_buffer); 4473 } 4474 4475 /* 4476 * This function will initialize new_rq and encrypt the content. 4477 * The first entry, new_rq[0], only contains a single iov which contains 4478 * a smb2_transform_hdr and is pre-allocated by the caller. 4479 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4480 * 4481 * The end result is an array of smb_rqst structures where the first structure 4482 * only contains a single iov for the transform header which we then can pass 4483 * to crypt_message(). 4484 * 4485 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4486 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4487 */ 4488 static int 4489 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4490 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4491 { 4492 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4493 unsigned int orig_len = 0; 4494 int rc = -ENOMEM; 4495 4496 for (int i = 1; i < num_rqst; i++) { 4497 struct smb_rqst *old = &old_rq[i - 1]; 4498 struct smb_rqst *new = &new_rq[i]; 4499 struct folio_queue *buffer = NULL; 4500 size_t size = iov_iter_count(&old->rq_iter); 4501 4502 orig_len += smb_rqst_len(server, old); 4503 new->rq_iov = old->rq_iov; 4504 new->rq_nvec = old->rq_nvec; 4505 4506 if (size > 0) { 4507 buffer = cifs_alloc_folioq_buffer(size); 4508 if (!buffer) 4509 goto err_free; 4510 4511 new->rq_buffer = buffer; 4512 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE, 4513 buffer, 0, 0, size); 4514 4515 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) { 4516 rc = -EIO; 4517 goto err_free; 4518 } 4519 } 4520 } 4521 4522 /* fill the 1st iov with a transform header */ 4523 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4524 4525 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4526 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4527 if (rc) 4528 goto err_free; 4529 4530 return rc; 4531 4532 err_free: 4533 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4534 return rc; 4535 } 4536 4537 static int 4538 smb3_is_transform_hdr(void *buf) 4539 { 4540 struct smb2_transform_hdr *trhdr = buf; 4541 4542 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4543 } 4544 4545 static int 4546 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4547 unsigned int buf_data_size, struct iov_iter *iter, 4548 bool is_offloaded) 4549 { 4550 struct crypto_aead *tfm; 4551 struct smb_rqst rqst = {NULL}; 4552 struct kvec iov[2]; 4553 size_t iter_size = 0; 4554 int rc; 4555 4556 iov[0].iov_base = buf; 4557 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4558 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4559 iov[1].iov_len = buf_data_size; 4560 4561 rqst.rq_iov = iov; 4562 rqst.rq_nvec = 2; 4563 if (iter) { 4564 rqst.rq_iter = *iter; 4565 iter_size = iov_iter_count(iter); 4566 } 4567 4568 if (is_offloaded) { 4569 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4570 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4571 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4572 else 4573 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4574 if (IS_ERR(tfm)) { 4575 rc = PTR_ERR(tfm); 4576 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4577 4578 return rc; 4579 } 4580 } else { 4581 rc = smb3_crypto_aead_allocate(server); 4582 if (unlikely(rc)) 4583 return rc; 4584 tfm = server->secmech.dec; 4585 } 4586 4587 rc = crypt_message(server, 1, &rqst, 0, tfm); 4588 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4589 4590 if (is_offloaded) 4591 crypto_free_aead(tfm); 4592 4593 if (rc) 4594 return rc; 4595 4596 memmove(buf, iov[1].iov_base, buf_data_size); 4597 4598 if (!is_offloaded) 4599 server->total_read = buf_data_size + iter_size; 4600 4601 return rc; 4602 } 4603 4604 static int 4605 cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size, 4606 size_t skip, struct iov_iter *iter) 4607 { 4608 for (; folioq; folioq = folioq->next) { 4609 for (int s = 0; s < folioq_count(folioq); s++) { 4610 struct folio *folio = folioq_folio(folioq, s); 4611 size_t fsize = folio_size(folio); 4612 size_t n, len = umin(fsize - skip, data_size); 4613 4614 n = copy_folio_to_iter(folio, skip, len, iter); 4615 if (n != len) { 4616 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4617 return -EIO; 4618 } 4619 data_size -= n; 4620 skip = 0; 4621 } 4622 } 4623 4624 return 0; 4625 } 4626 4627 static int 4628 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4629 char *buf, unsigned int buf_len, struct folio_queue *buffer, 4630 unsigned int buffer_len, bool is_offloaded) 4631 { 4632 unsigned int data_offset; 4633 unsigned int data_len; 4634 unsigned int cur_off; 4635 unsigned int cur_page_idx; 4636 unsigned int pad_len; 4637 struct cifs_io_subrequest *rdata = mid->callback_data; 4638 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4639 int length; 4640 bool use_rdma_mr = false; 4641 4642 if (shdr->Command != SMB2_READ) { 4643 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4644 return -EOPNOTSUPP; 4645 } 4646 4647 if (server->ops->is_session_expired && 4648 server->ops->is_session_expired(buf)) { 4649 if (!is_offloaded) 4650 cifs_reconnect(server, true); 4651 return -1; 4652 } 4653 4654 if (server->ops->is_status_pending && 4655 server->ops->is_status_pending(buf, server)) 4656 return -1; 4657 4658 /* set up first two iov to get credits */ 4659 rdata->iov[0].iov_base = buf; 4660 rdata->iov[0].iov_len = 0; 4661 rdata->iov[1].iov_base = buf; 4662 rdata->iov[1].iov_len = 4663 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4664 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4665 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4666 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4667 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4668 4669 rdata->result = server->ops->map_error(buf, true); 4670 if (rdata->result != 0) { 4671 cifs_dbg(FYI, "%s: server returned error %d\n", 4672 __func__, rdata->result); 4673 /* normal error on read response */ 4674 if (is_offloaded) 4675 mid->mid_state = MID_RESPONSE_RECEIVED; 4676 else 4677 dequeue_mid(mid, false); 4678 return 0; 4679 } 4680 4681 data_offset = server->ops->read_data_offset(buf); 4682 #ifdef CONFIG_CIFS_SMB_DIRECT 4683 use_rdma_mr = rdata->mr; 4684 #endif 4685 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4686 4687 if (data_offset < server->vals->read_rsp_size) { 4688 /* 4689 * win2k8 sometimes sends an offset of 0 when the read 4690 * is beyond the EOF. Treat it as if the data starts just after 4691 * the header. 4692 */ 4693 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4694 __func__, data_offset); 4695 data_offset = server->vals->read_rsp_size; 4696 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4697 /* data_offset is beyond the end of smallbuf */ 4698 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4699 __func__, data_offset); 4700 rdata->result = -EIO; 4701 if (is_offloaded) 4702 mid->mid_state = MID_RESPONSE_MALFORMED; 4703 else 4704 dequeue_mid(mid, rdata->result); 4705 return 0; 4706 } 4707 4708 pad_len = data_offset - server->vals->read_rsp_size; 4709 4710 if (buf_len <= data_offset) { 4711 /* read response payload is in pages */ 4712 cur_page_idx = pad_len / PAGE_SIZE; 4713 cur_off = pad_len % PAGE_SIZE; 4714 4715 if (cur_page_idx != 0) { 4716 /* data offset is beyond the 1st page of response */ 4717 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4718 __func__, data_offset); 4719 rdata->result = -EIO; 4720 if (is_offloaded) 4721 mid->mid_state = MID_RESPONSE_MALFORMED; 4722 else 4723 dequeue_mid(mid, rdata->result); 4724 return 0; 4725 } 4726 4727 if (data_len > buffer_len - pad_len) { 4728 /* data_len is corrupt -- discard frame */ 4729 rdata->result = -EIO; 4730 if (is_offloaded) 4731 mid->mid_state = MID_RESPONSE_MALFORMED; 4732 else 4733 dequeue_mid(mid, rdata->result); 4734 return 0; 4735 } 4736 4737 /* Copy the data to the output I/O iterator. */ 4738 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len, 4739 cur_off, &rdata->subreq.io_iter); 4740 if (rdata->result != 0) { 4741 if (is_offloaded) 4742 mid->mid_state = MID_RESPONSE_MALFORMED; 4743 else 4744 dequeue_mid(mid, rdata->result); 4745 return 0; 4746 } 4747 rdata->got_bytes = buffer_len; 4748 4749 } else if (buf_len >= data_offset + data_len) { 4750 /* read response payload is in buf */ 4751 WARN_ONCE(buffer, "read data can be either in buf or in buffer"); 4752 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4753 if (length < 0) 4754 return length; 4755 rdata->got_bytes = data_len; 4756 } else { 4757 /* read response payload cannot be in both buf and pages */ 4758 WARN_ONCE(1, "buf can not contain only a part of read data"); 4759 rdata->result = -EIO; 4760 if (is_offloaded) 4761 mid->mid_state = MID_RESPONSE_MALFORMED; 4762 else 4763 dequeue_mid(mid, rdata->result); 4764 return 0; 4765 } 4766 4767 if (is_offloaded) 4768 mid->mid_state = MID_RESPONSE_RECEIVED; 4769 else 4770 dequeue_mid(mid, false); 4771 return 0; 4772 } 4773 4774 struct smb2_decrypt_work { 4775 struct work_struct decrypt; 4776 struct TCP_Server_Info *server; 4777 struct folio_queue *buffer; 4778 char *buf; 4779 unsigned int len; 4780 }; 4781 4782 4783 static void smb2_decrypt_offload(struct work_struct *work) 4784 { 4785 struct smb2_decrypt_work *dw = container_of(work, 4786 struct smb2_decrypt_work, decrypt); 4787 int rc; 4788 struct mid_q_entry *mid; 4789 struct iov_iter iter; 4790 4791 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len); 4792 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4793 &iter, true); 4794 if (rc) { 4795 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4796 goto free_pages; 4797 } 4798 4799 dw->server->lstrp = jiffies; 4800 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4801 if (mid == NULL) 4802 cifs_dbg(FYI, "mid not found\n"); 4803 else { 4804 mid->decrypted = true; 4805 rc = handle_read_data(dw->server, mid, dw->buf, 4806 dw->server->vals->read_rsp_size, 4807 dw->buffer, dw->len, 4808 true); 4809 if (rc >= 0) { 4810 #ifdef CONFIG_CIFS_STATS2 4811 mid->when_received = jiffies; 4812 #endif 4813 if (dw->server->ops->is_network_name_deleted) 4814 dw->server->ops->is_network_name_deleted(dw->buf, 4815 dw->server); 4816 4817 mid_execute_callback(mid); 4818 } else { 4819 spin_lock(&dw->server->srv_lock); 4820 if (dw->server->tcpStatus == CifsNeedReconnect) { 4821 spin_lock(&dw->server->mid_queue_lock); 4822 mid->mid_state = MID_RETRY_NEEDED; 4823 spin_unlock(&dw->server->mid_queue_lock); 4824 spin_unlock(&dw->server->srv_lock); 4825 mid_execute_callback(mid); 4826 } else { 4827 spin_lock(&dw->server->mid_queue_lock); 4828 mid->mid_state = MID_REQUEST_SUBMITTED; 4829 mid->deleted_from_q = false; 4830 list_add_tail(&mid->qhead, 4831 &dw->server->pending_mid_q); 4832 spin_unlock(&dw->server->mid_queue_lock); 4833 spin_unlock(&dw->server->srv_lock); 4834 } 4835 } 4836 release_mid(mid); 4837 } 4838 4839 free_pages: 4840 cifs_clear_folioq_buffer(dw->buffer); 4841 cifs_small_buf_release(dw->buf); 4842 kfree(dw); 4843 } 4844 4845 4846 static int 4847 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4848 int *num_mids) 4849 { 4850 char *buf = server->smallbuf; 4851 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4852 struct iov_iter iter; 4853 unsigned int len; 4854 unsigned int buflen = server->pdu_size; 4855 int rc; 4856 struct smb2_decrypt_work *dw; 4857 4858 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4859 if (!dw) 4860 return -ENOMEM; 4861 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4862 dw->server = server; 4863 4864 *num_mids = 1; 4865 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4866 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4867 4868 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4869 if (rc < 0) 4870 goto free_dw; 4871 server->total_read += rc; 4872 4873 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4874 server->vals->read_rsp_size; 4875 dw->len = len; 4876 len = round_up(dw->len, PAGE_SIZE); 4877 4878 rc = -ENOMEM; 4879 dw->buffer = cifs_alloc_folioq_buffer(len); 4880 if (!dw->buffer) 4881 goto discard_data; 4882 4883 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len); 4884 4885 /* Read the data into the buffer and clear excess bufferage. */ 4886 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4887 if (rc < 0) 4888 goto discard_data; 4889 4890 server->total_read += rc; 4891 if (rc < len) { 4892 struct iov_iter tmp = iter; 4893 4894 iov_iter_advance(&tmp, rc); 4895 iov_iter_zero(len - rc, &tmp); 4896 } 4897 iov_iter_truncate(&iter, dw->len); 4898 4899 rc = cifs_discard_remaining_data(server); 4900 if (rc) 4901 goto free_pages; 4902 4903 /* 4904 * For large reads, offload to different thread for better performance, 4905 * use more cores decrypting which can be expensive 4906 */ 4907 4908 if ((server->min_offload) && (server->in_flight > 1) && 4909 (server->pdu_size >= server->min_offload)) { 4910 dw->buf = server->smallbuf; 4911 server->smallbuf = (char *)cifs_small_buf_get(); 4912 4913 queue_work(decrypt_wq, &dw->decrypt); 4914 *num_mids = 0; /* worker thread takes care of finding mid */ 4915 return -1; 4916 } 4917 4918 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4919 &iter, false); 4920 if (rc) 4921 goto free_pages; 4922 4923 *mid = smb2_find_mid(server, buf); 4924 if (*mid == NULL) { 4925 cifs_dbg(FYI, "mid not found\n"); 4926 } else { 4927 cifs_dbg(FYI, "mid found\n"); 4928 (*mid)->decrypted = true; 4929 rc = handle_read_data(server, *mid, buf, 4930 server->vals->read_rsp_size, 4931 dw->buffer, dw->len, false); 4932 if (rc >= 0) { 4933 if (server->ops->is_network_name_deleted) { 4934 server->ops->is_network_name_deleted(buf, 4935 server); 4936 } 4937 } 4938 } 4939 4940 free_pages: 4941 cifs_clear_folioq_buffer(dw->buffer); 4942 free_dw: 4943 kfree(dw); 4944 return rc; 4945 discard_data: 4946 cifs_discard_remaining_data(server); 4947 goto free_pages; 4948 } 4949 4950 static int 4951 receive_encrypted_standard(struct TCP_Server_Info *server, 4952 struct mid_q_entry **mids, char **bufs, 4953 int *num_mids) 4954 { 4955 int ret, length; 4956 char *buf = server->smallbuf; 4957 struct smb2_hdr *shdr; 4958 unsigned int pdu_length = server->pdu_size; 4959 unsigned int buf_size; 4960 unsigned int next_cmd; 4961 struct mid_q_entry *mid_entry; 4962 int next_is_large; 4963 char *next_buffer = NULL; 4964 4965 *num_mids = 0; 4966 4967 /* switch to large buffer if too big for a small one */ 4968 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4969 server->large_buf = true; 4970 memcpy(server->bigbuf, buf, server->total_read); 4971 buf = server->bigbuf; 4972 } 4973 4974 /* now read the rest */ 4975 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4976 pdu_length - HEADER_SIZE(server) + 1); 4977 if (length < 0) 4978 return length; 4979 server->total_read += length; 4980 4981 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4982 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4983 if (length) 4984 return length; 4985 4986 next_is_large = server->large_buf; 4987 one_more: 4988 shdr = (struct smb2_hdr *)buf; 4989 next_cmd = le32_to_cpu(shdr->NextCommand); 4990 if (next_cmd) { 4991 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4992 return -1; 4993 if (next_is_large) 4994 next_buffer = (char *)cifs_buf_get(); 4995 else 4996 next_buffer = (char *)cifs_small_buf_get(); 4997 if (!next_buffer) { 4998 cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); 4999 return -1; 5000 } 5001 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 5002 } 5003 5004 mid_entry = smb2_find_mid(server, buf); 5005 if (mid_entry == NULL) 5006 cifs_dbg(FYI, "mid not found\n"); 5007 else { 5008 cifs_dbg(FYI, "mid found\n"); 5009 mid_entry->decrypted = true; 5010 mid_entry->resp_buf_size = server->pdu_size; 5011 } 5012 5013 if (*num_mids >= MAX_COMPOUND) { 5014 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5015 return -1; 5016 } 5017 bufs[*num_mids] = buf; 5018 mids[(*num_mids)++] = mid_entry; 5019 5020 if (mid_entry && mid_entry->handle) 5021 ret = mid_entry->handle(server, mid_entry); 5022 else 5023 ret = cifs_handle_standard(server, mid_entry); 5024 5025 if (ret == 0 && next_cmd) { 5026 pdu_length -= next_cmd; 5027 server->large_buf = next_is_large; 5028 if (next_is_large) 5029 server->bigbuf = buf = next_buffer; 5030 else 5031 server->smallbuf = buf = next_buffer; 5032 goto one_more; 5033 } else if (ret != 0) { 5034 /* 5035 * ret != 0 here means that we didn't get to handle_mid() thus 5036 * server->smallbuf and server->bigbuf are still valid. We need 5037 * to free next_buffer because it is not going to be used 5038 * anywhere. 5039 */ 5040 if (next_is_large) 5041 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5042 else 5043 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5044 } 5045 5046 return ret; 5047 } 5048 5049 static int 5050 smb3_receive_transform(struct TCP_Server_Info *server, 5051 struct mid_q_entry **mids, char **bufs, int *num_mids) 5052 { 5053 char *buf = server->smallbuf; 5054 unsigned int pdu_length = server->pdu_size; 5055 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5056 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5057 5058 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5059 sizeof(struct smb2_hdr)) { 5060 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5061 pdu_length); 5062 cifs_reconnect(server, true); 5063 return -ECONNABORTED; 5064 } 5065 5066 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5067 cifs_server_dbg(VFS, "Transform message is broken\n"); 5068 cifs_reconnect(server, true); 5069 return -ECONNABORTED; 5070 } 5071 5072 /* TODO: add support for compounds containing READ. */ 5073 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5074 return receive_encrypted_read(server, &mids[0], num_mids); 5075 } 5076 5077 return receive_encrypted_standard(server, mids, bufs, num_mids); 5078 } 5079 5080 int 5081 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5082 { 5083 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5084 5085 return handle_read_data(server, mid, buf, server->pdu_size, 5086 NULL, 0, false); 5087 } 5088 5089 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5090 unsigned int *noff) 5091 { 5092 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5093 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5094 5095 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5096 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5097 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5098 return -EINVAL; 5099 } else { 5100 *noff = le32_to_cpu(hdr->NextCommand); 5101 } 5102 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5103 return -EINVAL; 5104 return 0; 5105 } 5106 5107 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5108 struct dentry *dentry, struct cifs_tcon *tcon, 5109 const char *full_path, umode_t mode, dev_t dev, 5110 const char *symname) 5111 { 5112 struct TCP_Server_Info *server = tcon->ses->server; 5113 struct cifs_open_parms oparms; 5114 struct cifs_open_info_data idata; 5115 struct cifs_io_parms io_parms = {}; 5116 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5117 struct cifs_fid fid; 5118 unsigned int bytes_written; 5119 u8 type[8]; 5120 int type_len = 0; 5121 struct { 5122 __le64 major; 5123 __le64 minor; 5124 } __packed pdev = {}; 5125 __le16 *symname_utf16 = NULL; 5126 u8 *data = NULL; 5127 int data_len = 0; 5128 struct kvec iov[3]; 5129 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5130 int rc; 5131 5132 switch (mode & S_IFMT) { 5133 case S_IFCHR: 5134 type_len = 8; 5135 memcpy(type, "IntxCHR\0", type_len); 5136 pdev.major = cpu_to_le64(MAJOR(dev)); 5137 pdev.minor = cpu_to_le64(MINOR(dev)); 5138 data = (u8 *)&pdev; 5139 data_len = sizeof(pdev); 5140 break; 5141 case S_IFBLK: 5142 type_len = 8; 5143 memcpy(type, "IntxBLK\0", type_len); 5144 pdev.major = cpu_to_le64(MAJOR(dev)); 5145 pdev.minor = cpu_to_le64(MINOR(dev)); 5146 data = (u8 *)&pdev; 5147 data_len = sizeof(pdev); 5148 break; 5149 case S_IFLNK: 5150 type_len = 8; 5151 memcpy(type, "IntxLNK\1", type_len); 5152 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname), 5153 &data_len, cifs_sb->local_nls, 5154 NO_MAP_UNI_RSVD); 5155 if (!symname_utf16) { 5156 rc = -ENOMEM; 5157 goto out; 5158 } 5159 data_len -= 2; /* symlink is without trailing wide-nul */ 5160 data = (u8 *)symname_utf16; 5161 break; 5162 case S_IFSOCK: 5163 type_len = 8; 5164 strscpy(type, "LnxSOCK"); 5165 data = (u8 *)&pdev; 5166 data_len = sizeof(pdev); 5167 break; 5168 case S_IFIFO: 5169 type_len = 8; 5170 strscpy(type, "LnxFIFO"); 5171 data = (u8 *)&pdev; 5172 data_len = sizeof(pdev); 5173 break; 5174 default: 5175 rc = -EPERM; 5176 goto out; 5177 } 5178 5179 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5180 FILE_CREATE, CREATE_NOT_DIR | 5181 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5182 oparms.fid = &fid; 5183 idata.contains_posix_file_info = false; 5184 rc = server->ops->open(xid, &oparms, &oplock, &idata); 5185 if (rc) 5186 goto out; 5187 5188 /* 5189 * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL 5190 * option. If not then server does not support ATTR_SYSTEM and newly 5191 * created file is not SFU compatible, which means that the call failed. 5192 */ 5193 if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) { 5194 rc = -EOPNOTSUPP; 5195 goto out_close; 5196 } 5197 5198 if (type_len + data_len > 0) { 5199 io_parms.pid = current->tgid; 5200 io_parms.tcon = tcon; 5201 io_parms.length = type_len + data_len; 5202 iov[1].iov_base = type; 5203 iov[1].iov_len = type_len; 5204 iov[2].iov_base = data; 5205 iov[2].iov_len = data_len; 5206 5207 rc = server->ops->sync_write(xid, &fid, &io_parms, 5208 &bytes_written, 5209 iov, ARRAY_SIZE(iov)-1); 5210 } 5211 5212 out_close: 5213 server->ops->close(xid, tcon, &fid); 5214 5215 /* 5216 * If CREATE was successful but either setting ATTR_SYSTEM failed or 5217 * writing type/data information failed then remove the intermediate 5218 * object created by CREATE. Otherwise intermediate empty object stay 5219 * on the server. 5220 */ 5221 if (rc) 5222 server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL); 5223 5224 out: 5225 kfree(symname_utf16); 5226 return rc; 5227 } 5228 5229 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5230 struct dentry *dentry, struct cifs_tcon *tcon, 5231 const char *full_path, umode_t mode, dev_t dev) 5232 { 5233 struct inode *new = NULL; 5234 int rc; 5235 5236 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5237 full_path, mode, dev, NULL); 5238 if (rc) 5239 return rc; 5240 5241 if (tcon->posix_extensions) { 5242 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5243 inode->i_sb, xid); 5244 } else if (tcon->unix_ext) { 5245 rc = cifs_get_inode_info_unix(&new, full_path, 5246 inode->i_sb, xid); 5247 } else { 5248 rc = cifs_get_inode_info(&new, full_path, NULL, 5249 inode->i_sb, xid, NULL); 5250 } 5251 if (!rc) 5252 d_instantiate(dentry, new); 5253 return rc; 5254 } 5255 5256 static int smb2_make_node(unsigned int xid, struct inode *inode, 5257 struct dentry *dentry, struct cifs_tcon *tcon, 5258 const char *full_path, umode_t mode, dev_t dev) 5259 { 5260 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5261 int rc = -EOPNOTSUPP; 5262 5263 /* 5264 * Check if mounted with mount parm 'sfu' mount parm. 5265 * SFU emulation should work with all servers, but only 5266 * supports block and char device, socket & fifo, 5267 * and was used by default in earlier versions of Windows 5268 */ 5269 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5270 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5271 full_path, mode, dev); 5272 } else if (CIFS_REPARSE_SUPPORT(tcon)) { 5273 rc = mknod_reparse(xid, inode, dentry, tcon, 5274 full_path, mode, dev); 5275 } 5276 return rc; 5277 } 5278 5279 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5280 struct smb_version_operations smb20_operations = { 5281 .compare_fids = smb2_compare_fids, 5282 .setup_request = smb2_setup_request, 5283 .setup_async_request = smb2_setup_async_request, 5284 .check_receive = smb2_check_receive, 5285 .add_credits = smb2_add_credits, 5286 .set_credits = smb2_set_credits, 5287 .get_credits_field = smb2_get_credits_field, 5288 .get_credits = smb2_get_credits, 5289 .wait_mtu_credits = cifs_wait_mtu_credits, 5290 .get_next_mid = smb2_get_next_mid, 5291 .revert_current_mid = smb2_revert_current_mid, 5292 .read_data_offset = smb2_read_data_offset, 5293 .read_data_length = smb2_read_data_length, 5294 .map_error = map_smb2_to_linux_error, 5295 .find_mid = smb2_find_mid, 5296 .check_message = smb2_check_message, 5297 .dump_detail = smb2_dump_detail, 5298 .clear_stats = smb2_clear_stats, 5299 .print_stats = smb2_print_stats, 5300 .is_oplock_break = smb2_is_valid_oplock_break, 5301 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5302 .downgrade_oplock = smb2_downgrade_oplock, 5303 .need_neg = smb2_need_neg, 5304 .negotiate = smb2_negotiate, 5305 .negotiate_wsize = smb2_negotiate_wsize, 5306 .negotiate_rsize = smb2_negotiate_rsize, 5307 .sess_setup = SMB2_sess_setup, 5308 .logoff = SMB2_logoff, 5309 .tree_connect = SMB2_tcon, 5310 .tree_disconnect = SMB2_tdis, 5311 .qfs_tcon = smb2_qfs_tcon, 5312 .is_path_accessible = smb2_is_path_accessible, 5313 .can_echo = smb2_can_echo, 5314 .echo = SMB2_echo, 5315 .query_path_info = smb2_query_path_info, 5316 .query_reparse_point = smb2_query_reparse_point, 5317 .get_srv_inum = smb2_get_srv_inum, 5318 .query_file_info = smb2_query_file_info, 5319 .set_path_size = smb2_set_path_size, 5320 .set_file_size = smb2_set_file_size, 5321 .set_file_info = smb2_set_file_info, 5322 .set_compression = smb2_set_compression, 5323 .mkdir = smb2_mkdir, 5324 .mkdir_setinfo = smb2_mkdir_setinfo, 5325 .rmdir = smb2_rmdir, 5326 .unlink = smb2_unlink, 5327 .rename = smb2_rename_path, 5328 .create_hardlink = smb2_create_hardlink, 5329 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5330 .query_mf_symlink = smb3_query_mf_symlink, 5331 .create_mf_symlink = smb3_create_mf_symlink, 5332 .create_reparse_inode = smb2_create_reparse_inode, 5333 .open = smb2_open_file, 5334 .set_fid = smb2_set_fid, 5335 .close = smb2_close_file, 5336 .flush = smb2_flush_file, 5337 .async_readv = smb2_async_readv, 5338 .async_writev = smb2_async_writev, 5339 .sync_read = smb2_sync_read, 5340 .sync_write = smb2_sync_write, 5341 .query_dir_first = smb2_query_dir_first, 5342 .query_dir_next = smb2_query_dir_next, 5343 .close_dir = smb2_close_dir, 5344 .calc_smb_size = smb2_calc_size, 5345 .is_status_pending = smb2_is_status_pending, 5346 .is_session_expired = smb2_is_session_expired, 5347 .oplock_response = smb2_oplock_response, 5348 .queryfs = smb2_queryfs, 5349 .mand_lock = smb2_mand_lock, 5350 .mand_unlock_range = smb2_unlock_range, 5351 .push_mand_locks = smb2_push_mandatory_locks, 5352 .get_lease_key = smb2_get_lease_key, 5353 .set_lease_key = smb2_set_lease_key, 5354 .new_lease_key = smb2_new_lease_key, 5355 .calc_signature = smb2_calc_signature, 5356 .is_read_op = smb2_is_read_op, 5357 .set_oplock_level = smb2_set_oplock_level, 5358 .create_lease_buf = smb2_create_lease_buf, 5359 .parse_lease_buf = smb2_parse_lease_buf, 5360 .copychunk_range = smb2_copychunk_range, 5361 .wp_retry_size = smb2_wp_retry_size, 5362 .dir_needs_close = smb2_dir_needs_close, 5363 .get_dfs_refer = smb2_get_dfs_refer, 5364 .select_sectype = smb2_select_sectype, 5365 #ifdef CONFIG_CIFS_XATTR 5366 .query_all_EAs = smb2_query_eas, 5367 .set_EA = smb2_set_ea, 5368 #endif /* CIFS_XATTR */ 5369 .get_acl = get_smb2_acl, 5370 .get_acl_by_fid = get_smb2_acl_by_fid, 5371 .set_acl = set_smb2_acl, 5372 .next_header = smb2_next_header, 5373 .ioctl_query_info = smb2_ioctl_query_info, 5374 .make_node = smb2_make_node, 5375 .fiemap = smb3_fiemap, 5376 .llseek = smb3_llseek, 5377 .is_status_io_timeout = smb2_is_status_io_timeout, 5378 .is_network_name_deleted = smb2_is_network_name_deleted, 5379 }; 5380 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5381 5382 struct smb_version_operations smb21_operations = { 5383 .compare_fids = smb2_compare_fids, 5384 .setup_request = smb2_setup_request, 5385 .setup_async_request = smb2_setup_async_request, 5386 .check_receive = smb2_check_receive, 5387 .add_credits = smb2_add_credits, 5388 .set_credits = smb2_set_credits, 5389 .get_credits_field = smb2_get_credits_field, 5390 .get_credits = smb2_get_credits, 5391 .wait_mtu_credits = smb2_wait_mtu_credits, 5392 .adjust_credits = smb2_adjust_credits, 5393 .get_next_mid = smb2_get_next_mid, 5394 .revert_current_mid = smb2_revert_current_mid, 5395 .read_data_offset = smb2_read_data_offset, 5396 .read_data_length = smb2_read_data_length, 5397 .map_error = map_smb2_to_linux_error, 5398 .find_mid = smb2_find_mid, 5399 .check_message = smb2_check_message, 5400 .dump_detail = smb2_dump_detail, 5401 .clear_stats = smb2_clear_stats, 5402 .print_stats = smb2_print_stats, 5403 .is_oplock_break = smb2_is_valid_oplock_break, 5404 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5405 .downgrade_oplock = smb2_downgrade_oplock, 5406 .need_neg = smb2_need_neg, 5407 .negotiate = smb2_negotiate, 5408 .negotiate_wsize = smb2_negotiate_wsize, 5409 .negotiate_rsize = smb2_negotiate_rsize, 5410 .sess_setup = SMB2_sess_setup, 5411 .logoff = SMB2_logoff, 5412 .tree_connect = SMB2_tcon, 5413 .tree_disconnect = SMB2_tdis, 5414 .qfs_tcon = smb2_qfs_tcon, 5415 .is_path_accessible = smb2_is_path_accessible, 5416 .can_echo = smb2_can_echo, 5417 .echo = SMB2_echo, 5418 .query_path_info = smb2_query_path_info, 5419 .query_reparse_point = smb2_query_reparse_point, 5420 .get_srv_inum = smb2_get_srv_inum, 5421 .query_file_info = smb2_query_file_info, 5422 .set_path_size = smb2_set_path_size, 5423 .set_file_size = smb2_set_file_size, 5424 .set_file_info = smb2_set_file_info, 5425 .set_compression = smb2_set_compression, 5426 .mkdir = smb2_mkdir, 5427 .mkdir_setinfo = smb2_mkdir_setinfo, 5428 .rmdir = smb2_rmdir, 5429 .unlink = smb2_unlink, 5430 .rename = smb2_rename_path, 5431 .create_hardlink = smb2_create_hardlink, 5432 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5433 .query_mf_symlink = smb3_query_mf_symlink, 5434 .create_mf_symlink = smb3_create_mf_symlink, 5435 .create_reparse_inode = smb2_create_reparse_inode, 5436 .open = smb2_open_file, 5437 .set_fid = smb2_set_fid, 5438 .close = smb2_close_file, 5439 .flush = smb2_flush_file, 5440 .async_readv = smb2_async_readv, 5441 .async_writev = smb2_async_writev, 5442 .sync_read = smb2_sync_read, 5443 .sync_write = smb2_sync_write, 5444 .query_dir_first = smb2_query_dir_first, 5445 .query_dir_next = smb2_query_dir_next, 5446 .close_dir = smb2_close_dir, 5447 .calc_smb_size = smb2_calc_size, 5448 .is_status_pending = smb2_is_status_pending, 5449 .is_session_expired = smb2_is_session_expired, 5450 .oplock_response = smb2_oplock_response, 5451 .queryfs = smb2_queryfs, 5452 .mand_lock = smb2_mand_lock, 5453 .mand_unlock_range = smb2_unlock_range, 5454 .push_mand_locks = smb2_push_mandatory_locks, 5455 .get_lease_key = smb2_get_lease_key, 5456 .set_lease_key = smb2_set_lease_key, 5457 .new_lease_key = smb2_new_lease_key, 5458 .calc_signature = smb2_calc_signature, 5459 .is_read_op = smb21_is_read_op, 5460 .set_oplock_level = smb21_set_oplock_level, 5461 .create_lease_buf = smb2_create_lease_buf, 5462 .parse_lease_buf = smb2_parse_lease_buf, 5463 .copychunk_range = smb2_copychunk_range, 5464 .wp_retry_size = smb2_wp_retry_size, 5465 .dir_needs_close = smb2_dir_needs_close, 5466 .enum_snapshots = smb3_enum_snapshots, 5467 .notify = smb3_notify, 5468 .get_dfs_refer = smb2_get_dfs_refer, 5469 .select_sectype = smb2_select_sectype, 5470 #ifdef CONFIG_CIFS_XATTR 5471 .query_all_EAs = smb2_query_eas, 5472 .set_EA = smb2_set_ea, 5473 #endif /* CIFS_XATTR */ 5474 .get_acl = get_smb2_acl, 5475 .get_acl_by_fid = get_smb2_acl_by_fid, 5476 .set_acl = set_smb2_acl, 5477 .next_header = smb2_next_header, 5478 .ioctl_query_info = smb2_ioctl_query_info, 5479 .make_node = smb2_make_node, 5480 .fiemap = smb3_fiemap, 5481 .llseek = smb3_llseek, 5482 .is_status_io_timeout = smb2_is_status_io_timeout, 5483 .is_network_name_deleted = smb2_is_network_name_deleted, 5484 }; 5485 5486 struct smb_version_operations smb30_operations = { 5487 .compare_fids = smb2_compare_fids, 5488 .setup_request = smb2_setup_request, 5489 .setup_async_request = smb2_setup_async_request, 5490 .check_receive = smb2_check_receive, 5491 .add_credits = smb2_add_credits, 5492 .set_credits = smb2_set_credits, 5493 .get_credits_field = smb2_get_credits_field, 5494 .get_credits = smb2_get_credits, 5495 .wait_mtu_credits = smb2_wait_mtu_credits, 5496 .adjust_credits = smb2_adjust_credits, 5497 .get_next_mid = smb2_get_next_mid, 5498 .revert_current_mid = smb2_revert_current_mid, 5499 .read_data_offset = smb2_read_data_offset, 5500 .read_data_length = smb2_read_data_length, 5501 .map_error = map_smb2_to_linux_error, 5502 .find_mid = smb2_find_mid, 5503 .check_message = smb2_check_message, 5504 .dump_detail = smb2_dump_detail, 5505 .clear_stats = smb2_clear_stats, 5506 .print_stats = smb2_print_stats, 5507 .dump_share_caps = smb2_dump_share_caps, 5508 .is_oplock_break = smb2_is_valid_oplock_break, 5509 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5510 .downgrade_oplock = smb3_downgrade_oplock, 5511 .need_neg = smb2_need_neg, 5512 .negotiate = smb2_negotiate, 5513 .negotiate_wsize = smb3_negotiate_wsize, 5514 .negotiate_rsize = smb3_negotiate_rsize, 5515 .sess_setup = SMB2_sess_setup, 5516 .logoff = SMB2_logoff, 5517 .tree_connect = SMB2_tcon, 5518 .tree_disconnect = SMB2_tdis, 5519 .qfs_tcon = smb3_qfs_tcon, 5520 .query_server_interfaces = SMB3_request_interfaces, 5521 .is_path_accessible = smb2_is_path_accessible, 5522 .can_echo = smb2_can_echo, 5523 .echo = SMB2_echo, 5524 .query_path_info = smb2_query_path_info, 5525 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5526 .query_reparse_point = smb2_query_reparse_point, 5527 .get_srv_inum = smb2_get_srv_inum, 5528 .query_file_info = smb2_query_file_info, 5529 .set_path_size = smb2_set_path_size, 5530 .set_file_size = smb2_set_file_size, 5531 .set_file_info = smb2_set_file_info, 5532 .set_compression = smb2_set_compression, 5533 .mkdir = smb2_mkdir, 5534 .mkdir_setinfo = smb2_mkdir_setinfo, 5535 .rmdir = smb2_rmdir, 5536 .unlink = smb2_unlink, 5537 .rename = smb2_rename_path, 5538 .create_hardlink = smb2_create_hardlink, 5539 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5540 .query_mf_symlink = smb3_query_mf_symlink, 5541 .create_mf_symlink = smb3_create_mf_symlink, 5542 .create_reparse_inode = smb2_create_reparse_inode, 5543 .open = smb2_open_file, 5544 .set_fid = smb2_set_fid, 5545 .close = smb2_close_file, 5546 .close_getattr = smb2_close_getattr, 5547 .flush = smb2_flush_file, 5548 .async_readv = smb2_async_readv, 5549 .async_writev = smb2_async_writev, 5550 .sync_read = smb2_sync_read, 5551 .sync_write = smb2_sync_write, 5552 .query_dir_first = smb2_query_dir_first, 5553 .query_dir_next = smb2_query_dir_next, 5554 .close_dir = smb2_close_dir, 5555 .calc_smb_size = smb2_calc_size, 5556 .is_status_pending = smb2_is_status_pending, 5557 .is_session_expired = smb2_is_session_expired, 5558 .oplock_response = smb2_oplock_response, 5559 .queryfs = smb2_queryfs, 5560 .mand_lock = smb2_mand_lock, 5561 .mand_unlock_range = smb2_unlock_range, 5562 .push_mand_locks = smb2_push_mandatory_locks, 5563 .get_lease_key = smb2_get_lease_key, 5564 .set_lease_key = smb2_set_lease_key, 5565 .new_lease_key = smb2_new_lease_key, 5566 .generate_signingkey = generate_smb30signingkey, 5567 .calc_signature = smb3_calc_signature, 5568 .set_integrity = smb3_set_integrity, 5569 .is_read_op = smb21_is_read_op, 5570 .set_oplock_level = smb3_set_oplock_level, 5571 .create_lease_buf = smb3_create_lease_buf, 5572 .parse_lease_buf = smb3_parse_lease_buf, 5573 .copychunk_range = smb2_copychunk_range, 5574 .duplicate_extents = smb2_duplicate_extents, 5575 .validate_negotiate = smb3_validate_negotiate, 5576 .wp_retry_size = smb2_wp_retry_size, 5577 .dir_needs_close = smb2_dir_needs_close, 5578 .fallocate = smb3_fallocate, 5579 .enum_snapshots = smb3_enum_snapshots, 5580 .notify = smb3_notify, 5581 .init_transform_rq = smb3_init_transform_rq, 5582 .is_transform_hdr = smb3_is_transform_hdr, 5583 .receive_transform = smb3_receive_transform, 5584 .get_dfs_refer = smb2_get_dfs_refer, 5585 .select_sectype = smb2_select_sectype, 5586 #ifdef CONFIG_CIFS_XATTR 5587 .query_all_EAs = smb2_query_eas, 5588 .set_EA = smb2_set_ea, 5589 #endif /* CIFS_XATTR */ 5590 .get_acl = get_smb2_acl, 5591 .get_acl_by_fid = get_smb2_acl_by_fid, 5592 .set_acl = set_smb2_acl, 5593 .next_header = smb2_next_header, 5594 .ioctl_query_info = smb2_ioctl_query_info, 5595 .make_node = smb2_make_node, 5596 .fiemap = smb3_fiemap, 5597 .llseek = smb3_llseek, 5598 .is_status_io_timeout = smb2_is_status_io_timeout, 5599 .is_network_name_deleted = smb2_is_network_name_deleted, 5600 }; 5601 5602 struct smb_version_operations smb311_operations = { 5603 .compare_fids = smb2_compare_fids, 5604 .setup_request = smb2_setup_request, 5605 .setup_async_request = smb2_setup_async_request, 5606 .check_receive = smb2_check_receive, 5607 .add_credits = smb2_add_credits, 5608 .set_credits = smb2_set_credits, 5609 .get_credits_field = smb2_get_credits_field, 5610 .get_credits = smb2_get_credits, 5611 .wait_mtu_credits = smb2_wait_mtu_credits, 5612 .adjust_credits = smb2_adjust_credits, 5613 .get_next_mid = smb2_get_next_mid, 5614 .revert_current_mid = smb2_revert_current_mid, 5615 .read_data_offset = smb2_read_data_offset, 5616 .read_data_length = smb2_read_data_length, 5617 .map_error = map_smb2_to_linux_error, 5618 .find_mid = smb2_find_mid, 5619 .check_message = smb2_check_message, 5620 .dump_detail = smb2_dump_detail, 5621 .clear_stats = smb2_clear_stats, 5622 .print_stats = smb2_print_stats, 5623 .dump_share_caps = smb2_dump_share_caps, 5624 .is_oplock_break = smb2_is_valid_oplock_break, 5625 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5626 .downgrade_oplock = smb3_downgrade_oplock, 5627 .need_neg = smb2_need_neg, 5628 .negotiate = smb2_negotiate, 5629 .negotiate_wsize = smb3_negotiate_wsize, 5630 .negotiate_rsize = smb3_negotiate_rsize, 5631 .sess_setup = SMB2_sess_setup, 5632 .logoff = SMB2_logoff, 5633 .tree_connect = SMB2_tcon, 5634 .tree_disconnect = SMB2_tdis, 5635 .qfs_tcon = smb3_qfs_tcon, 5636 .query_server_interfaces = SMB3_request_interfaces, 5637 .is_path_accessible = smb2_is_path_accessible, 5638 .can_echo = smb2_can_echo, 5639 .echo = SMB2_echo, 5640 .query_path_info = smb2_query_path_info, 5641 .query_reparse_point = smb2_query_reparse_point, 5642 .get_srv_inum = smb2_get_srv_inum, 5643 .query_file_info = smb2_query_file_info, 5644 .set_path_size = smb2_set_path_size, 5645 .set_file_size = smb2_set_file_size, 5646 .set_file_info = smb2_set_file_info, 5647 .set_compression = smb2_set_compression, 5648 .mkdir = smb2_mkdir, 5649 .mkdir_setinfo = smb2_mkdir_setinfo, 5650 .posix_mkdir = smb311_posix_mkdir, 5651 .rmdir = smb2_rmdir, 5652 .unlink = smb2_unlink, 5653 .rename = smb2_rename_path, 5654 .create_hardlink = smb2_create_hardlink, 5655 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5656 .query_mf_symlink = smb3_query_mf_symlink, 5657 .create_mf_symlink = smb3_create_mf_symlink, 5658 .create_reparse_inode = smb2_create_reparse_inode, 5659 .open = smb2_open_file, 5660 .set_fid = smb2_set_fid, 5661 .close = smb2_close_file, 5662 .close_getattr = smb2_close_getattr, 5663 .flush = smb2_flush_file, 5664 .async_readv = smb2_async_readv, 5665 .async_writev = smb2_async_writev, 5666 .sync_read = smb2_sync_read, 5667 .sync_write = smb2_sync_write, 5668 .query_dir_first = smb2_query_dir_first, 5669 .query_dir_next = smb2_query_dir_next, 5670 .close_dir = smb2_close_dir, 5671 .calc_smb_size = smb2_calc_size, 5672 .is_status_pending = smb2_is_status_pending, 5673 .is_session_expired = smb2_is_session_expired, 5674 .oplock_response = smb2_oplock_response, 5675 .queryfs = smb311_queryfs, 5676 .mand_lock = smb2_mand_lock, 5677 .mand_unlock_range = smb2_unlock_range, 5678 .push_mand_locks = smb2_push_mandatory_locks, 5679 .get_lease_key = smb2_get_lease_key, 5680 .set_lease_key = smb2_set_lease_key, 5681 .new_lease_key = smb2_new_lease_key, 5682 .generate_signingkey = generate_smb311signingkey, 5683 .calc_signature = smb3_calc_signature, 5684 .set_integrity = smb3_set_integrity, 5685 .is_read_op = smb21_is_read_op, 5686 .set_oplock_level = smb3_set_oplock_level, 5687 .create_lease_buf = smb3_create_lease_buf, 5688 .parse_lease_buf = smb3_parse_lease_buf, 5689 .copychunk_range = smb2_copychunk_range, 5690 .duplicate_extents = smb2_duplicate_extents, 5691 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5692 .wp_retry_size = smb2_wp_retry_size, 5693 .dir_needs_close = smb2_dir_needs_close, 5694 .fallocate = smb3_fallocate, 5695 .enum_snapshots = smb3_enum_snapshots, 5696 .notify = smb3_notify, 5697 .init_transform_rq = smb3_init_transform_rq, 5698 .is_transform_hdr = smb3_is_transform_hdr, 5699 .receive_transform = smb3_receive_transform, 5700 .get_dfs_refer = smb2_get_dfs_refer, 5701 .select_sectype = smb2_select_sectype, 5702 #ifdef CONFIG_CIFS_XATTR 5703 .query_all_EAs = smb2_query_eas, 5704 .set_EA = smb2_set_ea, 5705 #endif /* CIFS_XATTR */ 5706 .get_acl = get_smb2_acl, 5707 .get_acl_by_fid = get_smb2_acl_by_fid, 5708 .set_acl = set_smb2_acl, 5709 .next_header = smb2_next_header, 5710 .ioctl_query_info = smb2_ioctl_query_info, 5711 .make_node = smb2_make_node, 5712 .fiemap = smb3_fiemap, 5713 .llseek = smb3_llseek, 5714 .is_status_io_timeout = smb2_is_status_io_timeout, 5715 .is_network_name_deleted = smb2_is_network_name_deleted, 5716 }; 5717 5718 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5719 struct smb_version_values smb20_values = { 5720 .version_string = SMB20_VERSION_STRING, 5721 .protocol_id = SMB20_PROT_ID, 5722 .req_capabilities = 0, /* MBZ */ 5723 .large_lock_type = 0, 5724 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5725 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5726 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5727 .header_size = sizeof(struct smb2_hdr), 5728 .header_preamble_size = 0, 5729 .max_header_size = MAX_SMB2_HDR_SIZE, 5730 .read_rsp_size = sizeof(struct smb2_read_rsp), 5731 .lock_cmd = SMB2_LOCK, 5732 .cap_unix = 0, 5733 .cap_nt_find = SMB2_NT_FIND, 5734 .cap_large_files = SMB2_LARGE_FILES, 5735 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5736 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5737 .create_lease_size = sizeof(struct create_lease), 5738 }; 5739 #endif /* ALLOW_INSECURE_LEGACY */ 5740 5741 struct smb_version_values smb21_values = { 5742 .version_string = SMB21_VERSION_STRING, 5743 .protocol_id = SMB21_PROT_ID, 5744 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5745 .large_lock_type = 0, 5746 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5747 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5748 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5749 .header_size = sizeof(struct smb2_hdr), 5750 .header_preamble_size = 0, 5751 .max_header_size = MAX_SMB2_HDR_SIZE, 5752 .read_rsp_size = sizeof(struct smb2_read_rsp), 5753 .lock_cmd = SMB2_LOCK, 5754 .cap_unix = 0, 5755 .cap_nt_find = SMB2_NT_FIND, 5756 .cap_large_files = SMB2_LARGE_FILES, 5757 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5758 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5759 .create_lease_size = sizeof(struct create_lease), 5760 }; 5761 5762 struct smb_version_values smb3any_values = { 5763 .version_string = SMB3ANY_VERSION_STRING, 5764 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5765 .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, 5766 .large_lock_type = 0, 5767 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5768 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5769 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5770 .header_size = sizeof(struct smb2_hdr), 5771 .header_preamble_size = 0, 5772 .max_header_size = MAX_SMB2_HDR_SIZE, 5773 .read_rsp_size = sizeof(struct smb2_read_rsp), 5774 .lock_cmd = SMB2_LOCK, 5775 .cap_unix = 0, 5776 .cap_nt_find = SMB2_NT_FIND, 5777 .cap_large_files = SMB2_LARGE_FILES, 5778 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5779 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5780 .create_lease_size = sizeof(struct create_lease_v2), 5781 }; 5782 5783 struct smb_version_values smbdefault_values = { 5784 .version_string = SMBDEFAULT_VERSION_STRING, 5785 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5786 .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, 5787 .large_lock_type = 0, 5788 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5789 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5790 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5791 .header_size = sizeof(struct smb2_hdr), 5792 .header_preamble_size = 0, 5793 .max_header_size = MAX_SMB2_HDR_SIZE, 5794 .read_rsp_size = sizeof(struct smb2_read_rsp), 5795 .lock_cmd = SMB2_LOCK, 5796 .cap_unix = 0, 5797 .cap_nt_find = SMB2_NT_FIND, 5798 .cap_large_files = SMB2_LARGE_FILES, 5799 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5800 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5801 .create_lease_size = sizeof(struct create_lease_v2), 5802 }; 5803 5804 struct smb_version_values smb30_values = { 5805 .version_string = SMB30_VERSION_STRING, 5806 .protocol_id = SMB30_PROT_ID, 5807 .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, 5808 .large_lock_type = 0, 5809 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5810 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5811 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5812 .header_size = sizeof(struct smb2_hdr), 5813 .header_preamble_size = 0, 5814 .max_header_size = MAX_SMB2_HDR_SIZE, 5815 .read_rsp_size = sizeof(struct smb2_read_rsp), 5816 .lock_cmd = SMB2_LOCK, 5817 .cap_unix = 0, 5818 .cap_nt_find = SMB2_NT_FIND, 5819 .cap_large_files = SMB2_LARGE_FILES, 5820 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5821 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5822 .create_lease_size = sizeof(struct create_lease_v2), 5823 }; 5824 5825 struct smb_version_values smb302_values = { 5826 .version_string = SMB302_VERSION_STRING, 5827 .protocol_id = SMB302_PROT_ID, 5828 .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, 5829 .large_lock_type = 0, 5830 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5831 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5832 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5833 .header_size = sizeof(struct smb2_hdr), 5834 .header_preamble_size = 0, 5835 .max_header_size = MAX_SMB2_HDR_SIZE, 5836 .read_rsp_size = sizeof(struct smb2_read_rsp), 5837 .lock_cmd = SMB2_LOCK, 5838 .cap_unix = 0, 5839 .cap_nt_find = SMB2_NT_FIND, 5840 .cap_large_files = SMB2_LARGE_FILES, 5841 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5842 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5843 .create_lease_size = sizeof(struct create_lease_v2), 5844 }; 5845 5846 struct smb_version_values smb311_values = { 5847 .version_string = SMB311_VERSION_STRING, 5848 .protocol_id = SMB311_PROT_ID, 5849 .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, 5850 .large_lock_type = 0, 5851 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5852 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5853 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5854 .header_size = sizeof(struct smb2_hdr), 5855 .header_preamble_size = 0, 5856 .max_header_size = MAX_SMB2_HDR_SIZE, 5857 .read_rsp_size = sizeof(struct smb2_read_rsp), 5858 .lock_cmd = SMB2_LOCK, 5859 .cap_unix = 0, 5860 .cap_nt_find = SMB2_NT_FIND, 5861 .cap_large_files = SMB2_LARGE_FILES, 5862 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5863 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5864 .create_lease_size = sizeof(struct create_lease_v2), 5865 }; 5866