1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <linux/folio_queue.h> 17 #include <uapi/linux/magic.h> 18 #include "cifsfs.h" 19 #include "cifsglob.h" 20 #include "smb2pdu.h" 21 #include "smb2proto.h" 22 #include "cifsproto.h" 23 #include "cifs_debug.h" 24 #include "cifs_unicode.h" 25 #include "../common/smb2status.h" 26 #include "smb2glob.h" 27 #include "cifs_ioctl.h" 28 #include "smbdirect.h" 29 #include "fscache.h" 30 #include "fs_context.h" 31 #include "cached_dir.h" 32 #include "reparse.h" 33 34 /* Change credits for different ops and return the total number of credits */ 35 static int 36 change_conf(struct TCP_Server_Info *server) 37 { 38 server->credits += server->echo_credits + server->oplock_credits; 39 if (server->credits > server->max_credits) 40 server->credits = server->max_credits; 41 server->oplock_credits = server->echo_credits = 0; 42 switch (server->credits) { 43 case 0: 44 return 0; 45 case 1: 46 server->echoes = false; 47 server->oplocks = false; 48 break; 49 case 2: 50 server->echoes = true; 51 server->oplocks = false; 52 server->echo_credits = 1; 53 break; 54 default: 55 server->echoes = true; 56 if (enable_oplocks) { 57 server->oplocks = true; 58 server->oplock_credits = 1; 59 } else 60 server->oplocks = false; 61 62 server->echo_credits = 1; 63 } 64 server->credits -= server->echo_credits + server->oplock_credits; 65 return server->credits + server->echo_credits + server->oplock_credits; 66 } 67 68 static void 69 smb2_add_credits(struct TCP_Server_Info *server, 70 struct cifs_credits *credits, const int optype) 71 { 72 int *val, rc = -1; 73 int scredits, in_flight; 74 unsigned int add = credits->value; 75 unsigned int instance = credits->instance; 76 bool reconnect_detected = false; 77 bool reconnect_with_invalid_credits = false; 78 79 spin_lock(&server->req_lock); 80 val = server->ops->get_credits_field(server, optype); 81 82 /* eg found case where write overlapping reconnect messed up credits */ 83 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 84 reconnect_with_invalid_credits = true; 85 86 if ((instance == 0) || (instance == server->reconnect_instance)) 87 *val += add; 88 else 89 reconnect_detected = true; 90 91 if (*val > 65000) { 92 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 93 pr_warn_once("server overflowed SMB3 credits\n"); 94 trace_smb3_overflow_credits(server->current_mid, 95 server->conn_id, server->hostname, *val, 96 add, server->in_flight); 97 } 98 if (credits->in_flight_check > 1) { 99 pr_warn_once("rreq R=%08x[%x] Credits not in flight\n", 100 credits->rreq_debug_id, credits->rreq_debug_index); 101 } else { 102 credits->in_flight_check = 2; 103 } 104 if (WARN_ON_ONCE(server->in_flight == 0)) { 105 pr_warn_once("rreq R=%08x[%x] Zero in_flight\n", 106 credits->rreq_debug_id, credits->rreq_debug_index); 107 trace_smb3_rw_credits(credits->rreq_debug_id, 108 credits->rreq_debug_index, 109 credits->value, 110 server->credits, server->in_flight, 0, 111 cifs_trace_rw_credits_zero_in_flight); 112 } 113 server->in_flight--; 114 if (server->in_flight == 0 && 115 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 116 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 117 rc = change_conf(server); 118 /* 119 * Sometimes server returns 0 credits on oplock break ack - we need to 120 * rebalance credits in this case. 121 */ 122 else if (server->in_flight > 0 && server->oplock_credits == 0 && 123 server->oplocks) { 124 if (server->credits > 1) { 125 server->credits--; 126 server->oplock_credits++; 127 } 128 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 129 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 130 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 131 change_conf(server); 132 133 scredits = *val; 134 in_flight = server->in_flight; 135 spin_unlock(&server->req_lock); 136 wake_up(&server->request_q); 137 138 if (reconnect_detected) { 139 trace_smb3_reconnect_detected(server->current_mid, 140 server->conn_id, server->hostname, scredits, add, in_flight); 141 142 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 143 add, instance); 144 } 145 146 if (reconnect_with_invalid_credits) { 147 trace_smb3_reconnect_with_invalid_credits(server->current_mid, 148 server->conn_id, server->hostname, scredits, add, in_flight); 149 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 150 optype, scredits, add); 151 } 152 153 spin_lock(&server->srv_lock); 154 if (server->tcpStatus == CifsNeedReconnect 155 || server->tcpStatus == CifsExiting) { 156 spin_unlock(&server->srv_lock); 157 return; 158 } 159 spin_unlock(&server->srv_lock); 160 161 switch (rc) { 162 case -1: 163 /* change_conf hasn't been executed */ 164 break; 165 case 0: 166 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 167 break; 168 case 1: 169 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 170 break; 171 case 2: 172 cifs_dbg(FYI, "disabling oplocks\n"); 173 break; 174 default: 175 /* change_conf rebalanced credits for different types */ 176 break; 177 } 178 179 trace_smb3_add_credits(server->current_mid, 180 server->conn_id, server->hostname, scredits, add, in_flight); 181 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 182 } 183 184 static void 185 smb2_set_credits(struct TCP_Server_Info *server, const int val) 186 { 187 int scredits, in_flight; 188 189 spin_lock(&server->req_lock); 190 server->credits = val; 191 if (val == 1) { 192 server->reconnect_instance++; 193 /* 194 * ChannelSequence updated for all channels in primary channel so that consistent 195 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 196 */ 197 if (SERVER_IS_CHAN(server)) 198 server->primary_server->channel_sequence_num++; 199 else 200 server->channel_sequence_num++; 201 } 202 scredits = server->credits; 203 in_flight = server->in_flight; 204 spin_unlock(&server->req_lock); 205 206 trace_smb3_set_credits(server->current_mid, 207 server->conn_id, server->hostname, scredits, val, in_flight); 208 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 209 210 /* don't log while holding the lock */ 211 if (val == 1) 212 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 213 } 214 215 static int * 216 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 217 { 218 switch (optype) { 219 case CIFS_ECHO_OP: 220 return &server->echo_credits; 221 case CIFS_OBREAK_OP: 222 return &server->oplock_credits; 223 default: 224 return &server->credits; 225 } 226 } 227 228 static unsigned int 229 smb2_get_credits(struct mid_q_entry *mid) 230 { 231 return mid->credits_received; 232 } 233 234 static int 235 smb2_wait_mtu_credits(struct TCP_Server_Info *server, size_t size, 236 size_t *num, struct cifs_credits *credits) 237 { 238 int rc = 0; 239 unsigned int scredits, in_flight; 240 241 spin_lock(&server->req_lock); 242 while (1) { 243 spin_unlock(&server->req_lock); 244 245 spin_lock(&server->srv_lock); 246 if (server->tcpStatus == CifsExiting) { 247 spin_unlock(&server->srv_lock); 248 return -ENOENT; 249 } 250 spin_unlock(&server->srv_lock); 251 252 spin_lock(&server->req_lock); 253 if (server->credits <= 0) { 254 spin_unlock(&server->req_lock); 255 cifs_num_waiters_inc(server); 256 rc = wait_event_killable(server->request_q, 257 has_credits(server, &server->credits, 1)); 258 cifs_num_waiters_dec(server); 259 if (rc) 260 return rc; 261 spin_lock(&server->req_lock); 262 } else { 263 scredits = server->credits; 264 /* can deadlock with reopen */ 265 if (scredits <= 8) { 266 *num = SMB2_MAX_BUFFER_SIZE; 267 credits->value = 0; 268 credits->instance = 0; 269 break; 270 } 271 272 /* leave some credits for reopen and other ops */ 273 scredits -= 8; 274 *num = min_t(unsigned int, size, 275 scredits * SMB2_MAX_BUFFER_SIZE); 276 277 credits->value = 278 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 279 credits->instance = server->reconnect_instance; 280 server->credits -= credits->value; 281 server->in_flight++; 282 if (server->in_flight > server->max_in_flight) 283 server->max_in_flight = server->in_flight; 284 break; 285 } 286 } 287 scredits = server->credits; 288 in_flight = server->in_flight; 289 spin_unlock(&server->req_lock); 290 291 trace_smb3_wait_credits(server->current_mid, 292 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 293 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 294 __func__, credits->value, scredits); 295 296 return rc; 297 } 298 299 static int 300 smb2_adjust_credits(struct TCP_Server_Info *server, 301 struct cifs_io_subrequest *subreq, 302 unsigned int /*enum smb3_rw_credits_trace*/ trace) 303 { 304 struct cifs_credits *credits = &subreq->credits; 305 int new_val = DIV_ROUND_UP(subreq->subreq.len - subreq->subreq.transferred, 306 SMB2_MAX_BUFFER_SIZE); 307 int scredits, in_flight; 308 309 if (!credits->value || credits->value == new_val) 310 return 0; 311 312 if (credits->value < new_val) { 313 trace_smb3_rw_credits(subreq->rreq->debug_id, 314 subreq->subreq.debug_index, 315 credits->value, 316 server->credits, server->in_flight, 317 new_val - credits->value, 318 cifs_trace_rw_credits_no_adjust_up); 319 trace_smb3_too_many_credits(server->current_mid, 320 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 321 cifs_server_dbg(VFS, "R=%x[%x] request has less credits (%d) than required (%d)", 322 subreq->rreq->debug_id, subreq->subreq.debug_index, 323 credits->value, new_val); 324 325 return -EOPNOTSUPP; 326 } 327 328 spin_lock(&server->req_lock); 329 330 if (server->reconnect_instance != credits->instance) { 331 scredits = server->credits; 332 in_flight = server->in_flight; 333 spin_unlock(&server->req_lock); 334 335 trace_smb3_rw_credits(subreq->rreq->debug_id, 336 subreq->subreq.debug_index, 337 credits->value, 338 server->credits, server->in_flight, 339 new_val - credits->value, 340 cifs_trace_rw_credits_old_session); 341 trace_smb3_reconnect_detected(server->current_mid, 342 server->conn_id, server->hostname, scredits, 343 credits->value - new_val, in_flight); 344 cifs_server_dbg(VFS, "R=%x[%x] trying to return %d credits to old session\n", 345 subreq->rreq->debug_id, subreq->subreq.debug_index, 346 credits->value - new_val); 347 return -EAGAIN; 348 } 349 350 trace_smb3_rw_credits(subreq->rreq->debug_id, 351 subreq->subreq.debug_index, 352 credits->value, 353 server->credits, server->in_flight, 354 new_val - credits->value, trace); 355 server->credits += credits->value - new_val; 356 scredits = server->credits; 357 in_flight = server->in_flight; 358 spin_unlock(&server->req_lock); 359 wake_up(&server->request_q); 360 361 trace_smb3_adj_credits(server->current_mid, 362 server->conn_id, server->hostname, scredits, 363 credits->value - new_val, in_flight); 364 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 365 __func__, credits->value - new_val, scredits); 366 367 credits->value = new_val; 368 369 return 0; 370 } 371 372 static __u64 373 smb2_get_next_mid(struct TCP_Server_Info *server) 374 { 375 __u64 mid; 376 /* for SMB2 we need the current value */ 377 spin_lock(&server->mid_counter_lock); 378 mid = server->current_mid++; 379 spin_unlock(&server->mid_counter_lock); 380 return mid; 381 } 382 383 static void 384 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 385 { 386 spin_lock(&server->mid_counter_lock); 387 if (server->current_mid >= val) 388 server->current_mid -= val; 389 spin_unlock(&server->mid_counter_lock); 390 } 391 392 static struct mid_q_entry * 393 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 394 { 395 struct mid_q_entry *mid; 396 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 397 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 398 399 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 400 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 401 return NULL; 402 } 403 404 spin_lock(&server->mid_queue_lock); 405 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 406 if ((mid->mid == wire_mid) && 407 (mid->mid_state == MID_REQUEST_SUBMITTED) && 408 (mid->command == shdr->Command)) { 409 kref_get(&mid->refcount); 410 if (dequeue) { 411 list_del_init(&mid->qhead); 412 mid->deleted_from_q = true; 413 } 414 spin_unlock(&server->mid_queue_lock); 415 return mid; 416 } 417 } 418 spin_unlock(&server->mid_queue_lock); 419 return NULL; 420 } 421 422 static struct mid_q_entry * 423 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 424 { 425 return __smb2_find_mid(server, buf, false); 426 } 427 428 static struct mid_q_entry * 429 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 430 { 431 return __smb2_find_mid(server, buf, true); 432 } 433 434 static void 435 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 436 { 437 #ifdef CONFIG_CIFS_DEBUG2 438 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 439 440 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 441 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 442 shdr->Id.SyncId.ProcessId); 443 if (!server->ops->check_message(buf, server->total_read, server)) { 444 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 445 server->ops->calc_smb_size(buf)); 446 } 447 #endif 448 } 449 450 static bool 451 smb2_need_neg(struct TCP_Server_Info *server) 452 { 453 return server->max_read == 0; 454 } 455 456 static int 457 smb2_negotiate(const unsigned int xid, 458 struct cifs_ses *ses, 459 struct TCP_Server_Info *server) 460 { 461 int rc; 462 463 spin_lock(&server->mid_counter_lock); 464 server->current_mid = 0; 465 spin_unlock(&server->mid_counter_lock); 466 rc = SMB2_negotiate(xid, ses, server); 467 return rc; 468 } 469 470 static inline unsigned int 471 prevent_zero_iosize(unsigned int size, const char *type) 472 { 473 if (size == 0) { 474 cifs_dbg(VFS, "SMB: Zero %ssize calculated, using minimum value %u\n", 475 type, CIFS_MIN_DEFAULT_IOSIZE); 476 return CIFS_MIN_DEFAULT_IOSIZE; 477 } 478 return size; 479 } 480 481 static unsigned int 482 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 483 { 484 struct TCP_Server_Info *server = tcon->ses->server; 485 unsigned int wsize; 486 487 /* start with specified wsize, or default */ 488 wsize = ctx->got_wsize ? ctx->vol_wsize : CIFS_DEFAULT_IOSIZE; 489 wsize = min_t(unsigned int, wsize, server->max_write); 490 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 491 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 492 493 return prevent_zero_iosize(wsize, "w"); 494 } 495 496 static unsigned int 497 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 498 { 499 struct TCP_Server_Info *server = tcon->ses->server; 500 unsigned int wsize; 501 502 /* start with specified wsize, or default */ 503 wsize = ctx->got_wsize ? ctx->vol_wsize : SMB3_DEFAULT_IOSIZE; 504 wsize = min_t(unsigned int, wsize, server->max_write); 505 #ifdef CONFIG_CIFS_SMB_DIRECT 506 if (server->rdma) { 507 const struct smbdirect_socket_parameters *sp = 508 smbd_get_parameters(server->smbd_conn); 509 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 wsize = min_t(unsigned int, 516 wsize, 517 sp->max_fragmented_send_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 wsize = min_t(unsigned int, 522 wsize, sp->max_read_write_size); 523 } 524 #endif 525 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 526 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 527 528 return prevent_zero_iosize(wsize, "w"); 529 } 530 531 static unsigned int 532 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 533 { 534 struct TCP_Server_Info *server = tcon->ses->server; 535 unsigned int rsize; 536 537 /* start with specified rsize, or default */ 538 rsize = ctx->got_rsize ? ctx->vol_rsize : CIFS_DEFAULT_IOSIZE; 539 rsize = min_t(unsigned int, rsize, server->max_read); 540 541 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 542 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 543 544 return prevent_zero_iosize(rsize, "r"); 545 } 546 547 static unsigned int 548 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 549 { 550 struct TCP_Server_Info *server = tcon->ses->server; 551 unsigned int rsize; 552 553 /* start with specified rsize, or default */ 554 rsize = ctx->got_rsize ? ctx->vol_rsize : SMB3_DEFAULT_IOSIZE; 555 rsize = min_t(unsigned int, rsize, server->max_read); 556 #ifdef CONFIG_CIFS_SMB_DIRECT 557 if (server->rdma) { 558 const struct smbdirect_socket_parameters *sp = 559 smbd_get_parameters(server->smbd_conn); 560 561 if (server->sign) 562 /* 563 * Account for SMB2 data transfer packet header and 564 * possible encryption header 565 */ 566 rsize = min_t(unsigned int, 567 rsize, 568 sp->max_fragmented_recv_size - 569 SMB2_READWRITE_PDU_HEADER_SIZE - 570 sizeof(struct smb2_transform_hdr)); 571 else 572 rsize = min_t(unsigned int, 573 rsize, sp->max_read_write_size); 574 } 575 #endif 576 577 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 578 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 579 580 return prevent_zero_iosize(rsize, "r"); 581 } 582 583 /* 584 * compare two interfaces a and b 585 * return 0 if everything matches. 586 * return 1 if a is rdma capable, or rss capable, or has higher link speed 587 * return -1 otherwise. 588 */ 589 static int 590 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 591 { 592 int cmp_ret = 0; 593 594 WARN_ON(!a || !b); 595 if (a->rdma_capable == b->rdma_capable) { 596 if (a->rss_capable == b->rss_capable) { 597 if (a->speed == b->speed) { 598 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 599 (struct sockaddr *) &b->sockaddr); 600 if (!cmp_ret) 601 return 0; 602 else if (cmp_ret > 0) 603 return 1; 604 else 605 return -1; 606 } else if (a->speed > b->speed) 607 return 1; 608 else 609 return -1; 610 } else if (a->rss_capable > b->rss_capable) 611 return 1; 612 else 613 return -1; 614 } else if (a->rdma_capable > b->rdma_capable) 615 return 1; 616 else 617 return -1; 618 } 619 620 static int 621 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 622 size_t buf_len, struct cifs_ses *ses, bool in_mount) 623 { 624 struct network_interface_info_ioctl_rsp *p; 625 struct sockaddr_in *addr4; 626 struct sockaddr_in6 *addr6; 627 struct iface_info_ipv4 *p4; 628 struct iface_info_ipv6 *p6; 629 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 630 struct cifs_server_iface tmp_iface; 631 ssize_t bytes_left; 632 size_t next = 0; 633 int nb_iface = 0; 634 int rc = 0, ret = 0; 635 636 bytes_left = buf_len; 637 p = buf; 638 639 spin_lock(&ses->iface_lock); 640 /* do not query too frequently, this time with lock held */ 641 if (ses->iface_last_update && 642 time_before(jiffies, ses->iface_last_update + 643 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 644 spin_unlock(&ses->iface_lock); 645 return 0; 646 } 647 648 /* 649 * Go through iface_list and mark them as inactive 650 */ 651 list_for_each_entry_safe(iface, niface, &ses->iface_list, 652 iface_head) 653 iface->is_active = 0; 654 655 spin_unlock(&ses->iface_lock); 656 657 /* 658 * Samba server e.g. can return an empty interface list in some cases, 659 * which would only be a problem if we were requesting multichannel 660 */ 661 if (bytes_left == 0) { 662 /* avoid spamming logs every 10 minutes, so log only in mount */ 663 if ((ses->chan_max > 1) && in_mount) 664 cifs_dbg(VFS, 665 "multichannel not available\n" 666 "Empty network interface list returned by server %s\n", 667 ses->server->hostname); 668 rc = -EOPNOTSUPP; 669 ses->iface_last_update = jiffies; 670 goto out; 671 } 672 673 while (bytes_left >= (ssize_t)sizeof(*p)) { 674 memset(&tmp_iface, 0, sizeof(tmp_iface)); 675 /* default to 1Gbps when link speed is unset */ 676 tmp_iface.speed = le64_to_cpu(p->LinkSpeed) ?: 1000000000; 677 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 678 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 679 680 switch (p->Family) { 681 /* 682 * The kernel and wire socket structures have the same 683 * layout and use network byte order but make the 684 * conversion explicit in case either one changes. 685 */ 686 case INTERNETWORK: 687 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 688 p4 = (struct iface_info_ipv4 *)p->Buffer; 689 addr4->sin_family = AF_INET; 690 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 691 692 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 693 addr4->sin_port = cpu_to_be16(CIFS_PORT); 694 695 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 696 &addr4->sin_addr); 697 break; 698 case INTERNETWORKV6: 699 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 700 p6 = (struct iface_info_ipv6 *)p->Buffer; 701 addr6->sin6_family = AF_INET6; 702 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 703 704 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 705 addr6->sin6_flowinfo = 0; 706 addr6->sin6_scope_id = 0; 707 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 708 709 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 710 &addr6->sin6_addr); 711 break; 712 default: 713 cifs_dbg(VFS, 714 "%s: skipping unsupported socket family\n", 715 __func__); 716 goto next_iface; 717 } 718 719 /* 720 * The iface_list is assumed to be sorted by speed. 721 * Check if the new interface exists in that list. 722 * NEVER change iface. it could be in use. 723 * Add a new one instead 724 */ 725 spin_lock(&ses->iface_lock); 726 list_for_each_entry_safe(iface, niface, &ses->iface_list, 727 iface_head) { 728 ret = iface_cmp(iface, &tmp_iface); 729 if (!ret) { 730 iface->is_active = 1; 731 spin_unlock(&ses->iface_lock); 732 goto next_iface; 733 } else if (ret < 0) { 734 /* all remaining ifaces are slower */ 735 kref_get(&iface->refcount); 736 break; 737 } 738 } 739 spin_unlock(&ses->iface_lock); 740 741 /* no match. insert the entry in the list */ 742 info = kmalloc(sizeof(struct cifs_server_iface), 743 GFP_KERNEL); 744 if (!info) { 745 rc = -ENOMEM; 746 goto out; 747 } 748 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 749 750 /* add this new entry to the list */ 751 kref_init(&info->refcount); 752 info->is_active = 1; 753 754 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 755 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 756 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 757 le32_to_cpu(p->Capability)); 758 759 spin_lock(&ses->iface_lock); 760 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 761 list_add_tail(&info->iface_head, &iface->iface_head); 762 kref_put(&iface->refcount, release_iface); 763 } else 764 list_add_tail(&info->iface_head, &ses->iface_list); 765 766 ses->iface_count++; 767 spin_unlock(&ses->iface_lock); 768 next_iface: 769 nb_iface++; 770 next = le32_to_cpu(p->Next); 771 if (!next) { 772 bytes_left -= sizeof(*p); 773 break; 774 } 775 /* Validate that Next doesn't point beyond the buffer */ 776 if (next > bytes_left) { 777 cifs_dbg(VFS, "%s: invalid Next pointer %zu > %zd\n", 778 __func__, next, bytes_left); 779 rc = -EINVAL; 780 goto out; 781 } 782 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 783 bytes_left -= next; 784 } 785 786 if (!nb_iface) { 787 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 788 rc = -EINVAL; 789 goto out; 790 } 791 792 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 793 if ((bytes_left > 8) || 794 (bytes_left >= offsetof(struct network_interface_info_ioctl_rsp, Next) 795 + sizeof(p->Next) && p->Next)) 796 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 797 798 ses->iface_last_update = jiffies; 799 800 out: 801 /* 802 * Go through the list again and put the inactive entries 803 */ 804 spin_lock(&ses->iface_lock); 805 list_for_each_entry_safe(iface, niface, &ses->iface_list, 806 iface_head) { 807 if (!iface->is_active) { 808 list_del(&iface->iface_head); 809 kref_put(&iface->refcount, release_iface); 810 ses->iface_count--; 811 } 812 } 813 spin_unlock(&ses->iface_lock); 814 815 return rc; 816 } 817 818 int 819 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 820 { 821 int rc; 822 unsigned int ret_data_len = 0; 823 struct network_interface_info_ioctl_rsp *out_buf = NULL; 824 struct cifs_ses *ses = tcon->ses; 825 struct TCP_Server_Info *pserver; 826 827 /* do not query too frequently */ 828 if (ses->iface_last_update && 829 time_before(jiffies, ses->iface_last_update + 830 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 831 return 0; 832 833 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 834 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 835 NULL /* no data input */, 0 /* no data input */, 836 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 837 if (rc == -EOPNOTSUPP) { 838 cifs_dbg(FYI, 839 "server does not support query network interfaces\n"); 840 ret_data_len = 0; 841 } else if (rc != 0) { 842 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 843 goto out; 844 } 845 846 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 847 if (rc) 848 goto out; 849 850 /* check if iface is still active */ 851 spin_lock(&ses->chan_lock); 852 pserver = ses->chans[0].server; 853 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 854 spin_unlock(&ses->chan_lock); 855 cifs_chan_update_iface(ses, pserver); 856 spin_lock(&ses->chan_lock); 857 } 858 spin_unlock(&ses->chan_lock); 859 860 out: 861 kfree(out_buf); 862 return rc; 863 } 864 865 static void 866 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 867 struct cifs_sb_info *cifs_sb) 868 { 869 int rc; 870 __le16 srch_path = 0; /* Null - open root of share */ 871 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 872 struct cifs_open_parms oparms; 873 struct cifs_fid fid; 874 struct cached_fid *cfid = NULL; 875 876 oparms = (struct cifs_open_parms) { 877 .tcon = tcon, 878 .path = "", 879 .desired_access = FILE_READ_ATTRIBUTES, 880 .disposition = FILE_OPEN, 881 .create_options = cifs_create_options(cifs_sb, 0), 882 .fid = &fid, 883 }; 884 885 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 886 if (rc == 0) 887 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 888 else 889 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 890 NULL, NULL); 891 if (rc) 892 return; 893 894 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 895 896 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 897 FS_ATTRIBUTE_INFORMATION); 898 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 899 FS_DEVICE_INFORMATION); 900 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 901 FS_VOLUME_INFORMATION); 902 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 903 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 904 if (cfid == NULL) 905 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 906 else 907 close_cached_dir(cfid); 908 } 909 910 static void 911 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 912 struct cifs_sb_info *cifs_sb) 913 { 914 int rc; 915 __le16 srch_path = 0; /* Null - open root of share */ 916 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 917 struct cifs_open_parms oparms; 918 struct cifs_fid fid; 919 920 oparms = (struct cifs_open_parms) { 921 .tcon = tcon, 922 .path = "", 923 .desired_access = FILE_READ_ATTRIBUTES, 924 .disposition = FILE_OPEN, 925 .create_options = cifs_create_options(cifs_sb, 0), 926 .fid = &fid, 927 }; 928 929 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 930 NULL, NULL); 931 if (rc) 932 return; 933 934 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 935 FS_ATTRIBUTE_INFORMATION); 936 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 937 FS_DEVICE_INFORMATION); 938 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 939 } 940 941 static int 942 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 943 struct cifs_sb_info *cifs_sb, const char *full_path) 944 { 945 __le16 *utf16_path; 946 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 947 int err_buftype = CIFS_NO_BUFFER; 948 struct cifs_open_parms oparms; 949 struct kvec err_iov = {}; 950 struct cifs_fid fid; 951 struct cached_fid *cfid; 952 bool islink; 953 int rc, rc2; 954 955 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 956 if (!rc) { 957 close_cached_dir(cfid); 958 return 0; 959 } 960 961 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 962 if (!utf16_path) 963 return -ENOMEM; 964 965 oparms = (struct cifs_open_parms) { 966 .tcon = tcon, 967 .path = full_path, 968 .desired_access = FILE_READ_ATTRIBUTES, 969 .disposition = FILE_OPEN, 970 .create_options = cifs_create_options(cifs_sb, 0), 971 .fid = &fid, 972 }; 973 974 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 975 &err_iov, &err_buftype); 976 if (rc) { 977 struct smb2_hdr *hdr = err_iov.iov_base; 978 979 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 980 goto out; 981 982 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 983 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 984 full_path, &islink); 985 if (rc2) { 986 rc = rc2; 987 goto out; 988 } 989 if (islink) 990 rc = -EREMOTE; 991 } 992 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && 993 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 994 rc = -EOPNOTSUPP; 995 goto out; 996 } 997 998 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 999 1000 out: 1001 free_rsp_buf(err_buftype, err_iov.iov_base); 1002 kfree(utf16_path); 1003 return rc; 1004 } 1005 1006 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 1007 struct cifs_sb_info *cifs_sb, const char *full_path, 1008 u64 *uniqueid, struct cifs_open_info_data *data) 1009 { 1010 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 1011 return 0; 1012 } 1013 1014 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 1015 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 1016 { 1017 struct cifs_fid *fid = &cfile->fid; 1018 1019 if (cfile->symlink_target) { 1020 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 1021 if (!data->symlink_target) 1022 return -ENOMEM; 1023 } 1024 data->contains_posix_file_info = false; 1025 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 1026 } 1027 1028 #ifdef CONFIG_CIFS_XATTR 1029 static ssize_t 1030 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 1031 struct smb2_file_full_ea_info *src, size_t src_size, 1032 const unsigned char *ea_name) 1033 { 1034 int rc = 0; 1035 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 1036 char *name, *value; 1037 size_t buf_size = dst_size; 1038 size_t name_len, value_len, user_name_len; 1039 1040 while (src_size > 0) { 1041 name_len = (size_t)src->ea_name_length; 1042 value_len = (size_t)le16_to_cpu(src->ea_value_length); 1043 1044 if (name_len == 0) 1045 break; 1046 1047 if (src_size < 8 + name_len + 1 + value_len) { 1048 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 1049 rc = -EIO; 1050 goto out; 1051 } 1052 1053 name = &src->ea_data[0]; 1054 value = &src->ea_data[src->ea_name_length + 1]; 1055 1056 if (ea_name) { 1057 if (ea_name_len == name_len && 1058 memcmp(ea_name, name, name_len) == 0) { 1059 rc = value_len; 1060 if (dst_size == 0) 1061 goto out; 1062 if (dst_size < value_len) { 1063 rc = -ERANGE; 1064 goto out; 1065 } 1066 memcpy(dst, value, value_len); 1067 goto out; 1068 } 1069 } else { 1070 /* 'user.' plus a terminating null */ 1071 user_name_len = 5 + 1 + name_len; 1072 1073 if (buf_size == 0) { 1074 /* skip copy - calc size only */ 1075 rc += user_name_len; 1076 } else if (dst_size >= user_name_len) { 1077 dst_size -= user_name_len; 1078 memcpy(dst, "user.", 5); 1079 dst += 5; 1080 memcpy(dst, src->ea_data, name_len); 1081 dst += name_len; 1082 *dst = 0; 1083 ++dst; 1084 rc += user_name_len; 1085 } else { 1086 /* stop before overrun buffer */ 1087 rc = -ERANGE; 1088 break; 1089 } 1090 } 1091 1092 if (!src->next_entry_offset) 1093 break; 1094 1095 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1096 /* stop before overrun buffer */ 1097 rc = -ERANGE; 1098 break; 1099 } 1100 src_size -= le32_to_cpu(src->next_entry_offset); 1101 src = (void *)((char *)src + 1102 le32_to_cpu(src->next_entry_offset)); 1103 } 1104 1105 /* didn't find the named attribute */ 1106 if (ea_name) 1107 rc = -ENODATA; 1108 1109 out: 1110 return (ssize_t)rc; 1111 } 1112 1113 static ssize_t 1114 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1115 const unsigned char *path, const unsigned char *ea_name, 1116 char *ea_data, size_t buf_size, 1117 struct cifs_sb_info *cifs_sb) 1118 { 1119 int rc; 1120 struct kvec rsp_iov = {NULL, 0}; 1121 int buftype = CIFS_NO_BUFFER; 1122 struct smb2_query_info_rsp *rsp; 1123 struct smb2_file_full_ea_info *info = NULL; 1124 1125 rc = smb2_query_info_compound(xid, tcon, path, 1126 FILE_READ_EA, 1127 FILE_FULL_EA_INFORMATION, 1128 SMB2_O_INFO_FILE, 1129 CIFSMaxBufSize - 1130 MAX_SMB2_CREATE_RESPONSE_SIZE - 1131 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1132 &rsp_iov, &buftype, cifs_sb); 1133 if (rc) { 1134 /* 1135 * If ea_name is NULL (listxattr) and there are no EAs, 1136 * return 0 as it's not an error. Otherwise, the specified 1137 * ea_name was not found. 1138 */ 1139 if (!ea_name && rc == -ENODATA) 1140 rc = 0; 1141 goto qeas_exit; 1142 } 1143 1144 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1145 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1146 le32_to_cpu(rsp->OutputBufferLength), 1147 &rsp_iov, 1148 sizeof(struct smb2_file_full_ea_info)); 1149 if (rc) 1150 goto qeas_exit; 1151 1152 info = (struct smb2_file_full_ea_info *)( 1153 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1154 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1155 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1156 1157 qeas_exit: 1158 free_rsp_buf(buftype, rsp_iov.iov_base); 1159 return rc; 1160 } 1161 1162 static int 1163 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1164 const char *path, const char *ea_name, const void *ea_value, 1165 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1166 struct cifs_sb_info *cifs_sb) 1167 { 1168 struct smb2_compound_vars *vars; 1169 struct cifs_ses *ses = tcon->ses; 1170 struct TCP_Server_Info *server; 1171 struct smb_rqst *rqst; 1172 struct kvec *rsp_iov; 1173 __le16 *utf16_path = NULL; 1174 int ea_name_len = strlen(ea_name); 1175 int flags = CIFS_CP_CREATE_CLOSE_OP; 1176 int len; 1177 int resp_buftype[3]; 1178 struct cifs_open_parms oparms; 1179 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1180 struct cifs_fid fid; 1181 unsigned int size[1]; 1182 void *data[1]; 1183 struct smb2_file_full_ea_info *ea; 1184 struct smb2_query_info_rsp *rsp; 1185 int rc, used_len = 0; 1186 int retries = 0, cur_sleep = 1; 1187 1188 replay_again: 1189 /* reinitialize for possible replay */ 1190 flags = CIFS_CP_CREATE_CLOSE_OP; 1191 oplock = SMB2_OPLOCK_LEVEL_NONE; 1192 server = cifs_pick_channel(ses); 1193 1194 if (smb3_encryption_required(tcon)) 1195 flags |= CIFS_TRANSFORM_REQ; 1196 1197 if (ea_name_len > 255) 1198 return -EINVAL; 1199 1200 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1201 if (!utf16_path) 1202 return -ENOMEM; 1203 1204 ea = NULL; 1205 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1206 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1207 if (!vars) { 1208 rc = -ENOMEM; 1209 goto out_free_path; 1210 } 1211 rqst = vars->rqst; 1212 rsp_iov = vars->rsp_iov; 1213 1214 if (ses->server->ops->query_all_EAs) { 1215 if (!ea_value) { 1216 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1217 ea_name, NULL, 0, 1218 cifs_sb); 1219 if (rc == -ENODATA) 1220 goto sea_exit; 1221 } else { 1222 /* If we are adding a attribute we should first check 1223 * if there will be enough space available to store 1224 * the new EA. If not we should not add it since we 1225 * would not be able to even read the EAs back. 1226 */ 1227 rc = smb2_query_info_compound(xid, tcon, path, 1228 FILE_READ_EA, 1229 FILE_FULL_EA_INFORMATION, 1230 SMB2_O_INFO_FILE, 1231 CIFSMaxBufSize - 1232 MAX_SMB2_CREATE_RESPONSE_SIZE - 1233 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1234 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1235 if (rc == 0) { 1236 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1237 used_len = le32_to_cpu(rsp->OutputBufferLength); 1238 } 1239 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1240 resp_buftype[1] = CIFS_NO_BUFFER; 1241 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1242 rc = 0; 1243 1244 /* Use a fudge factor of 256 bytes in case we collide 1245 * with a different set_EAs command. 1246 */ 1247 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1248 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1249 used_len + ea_name_len + ea_value_len + 1) { 1250 rc = -ENOSPC; 1251 goto sea_exit; 1252 } 1253 } 1254 } 1255 1256 /* Open */ 1257 rqst[0].rq_iov = vars->open_iov; 1258 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1259 1260 oparms = (struct cifs_open_parms) { 1261 .tcon = tcon, 1262 .path = path, 1263 .desired_access = FILE_WRITE_EA, 1264 .disposition = FILE_OPEN, 1265 .create_options = cifs_create_options(cifs_sb, 0), 1266 .fid = &fid, 1267 .replay = !!(retries), 1268 }; 1269 1270 rc = SMB2_open_init(tcon, server, 1271 &rqst[0], &oplock, &oparms, utf16_path); 1272 if (rc) 1273 goto sea_exit; 1274 smb2_set_next_command(tcon, &rqst[0]); 1275 1276 1277 /* Set Info */ 1278 rqst[1].rq_iov = vars->si_iov; 1279 rqst[1].rq_nvec = 1; 1280 1281 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1282 ea = kzalloc(len, GFP_KERNEL); 1283 if (ea == NULL) { 1284 rc = -ENOMEM; 1285 goto sea_exit; 1286 } 1287 1288 ea->ea_name_length = ea_name_len; 1289 ea->ea_value_length = cpu_to_le16(ea_value_len); 1290 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1291 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1292 1293 size[0] = len; 1294 data[0] = ea; 1295 1296 rc = SMB2_set_info_init(tcon, server, 1297 &rqst[1], COMPOUND_FID, 1298 COMPOUND_FID, current->tgid, 1299 FILE_FULL_EA_INFORMATION, 1300 SMB2_O_INFO_FILE, 0, data, size); 1301 if (rc) 1302 goto sea_exit; 1303 smb2_set_next_command(tcon, &rqst[1]); 1304 smb2_set_related(&rqst[1]); 1305 1306 /* Close */ 1307 rqst[2].rq_iov = &vars->close_iov; 1308 rqst[2].rq_nvec = 1; 1309 rc = SMB2_close_init(tcon, server, 1310 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1311 if (rc) 1312 goto sea_exit; 1313 smb2_set_related(&rqst[2]); 1314 1315 if (retries) { 1316 smb2_set_replay(server, &rqst[0]); 1317 smb2_set_replay(server, &rqst[1]); 1318 smb2_set_replay(server, &rqst[2]); 1319 } 1320 1321 rc = compound_send_recv(xid, ses, server, 1322 flags, 3, rqst, 1323 resp_buftype, rsp_iov); 1324 /* no need to bump num_remote_opens because handle immediately closed */ 1325 1326 sea_exit: 1327 kfree(ea); 1328 SMB2_open_free(&rqst[0]); 1329 SMB2_set_info_free(&rqst[1]); 1330 SMB2_close_free(&rqst[2]); 1331 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1332 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1333 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1334 kfree(vars); 1335 out_free_path: 1336 kfree(utf16_path); 1337 1338 if (is_replayable_error(rc) && 1339 smb2_should_replay(tcon, &retries, &cur_sleep)) 1340 goto replay_again; 1341 1342 return rc; 1343 } 1344 #endif 1345 1346 static bool 1347 smb2_can_echo(struct TCP_Server_Info *server) 1348 { 1349 return server->echoes; 1350 } 1351 1352 static void 1353 smb2_clear_stats(struct cifs_tcon *tcon) 1354 { 1355 int i; 1356 1357 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1358 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1359 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1360 } 1361 } 1362 1363 static void 1364 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1365 { 1366 seq_puts(m, "\n\tShare Capabilities:"); 1367 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1368 seq_puts(m, " DFS,"); 1369 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1370 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1371 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1372 seq_puts(m, " SCALEOUT,"); 1373 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1374 seq_puts(m, " CLUSTER,"); 1375 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1376 seq_puts(m, " ASYMMETRIC,"); 1377 if (tcon->capabilities == 0) 1378 seq_puts(m, " None"); 1379 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1380 seq_puts(m, " Aligned,"); 1381 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1382 seq_puts(m, " Partition Aligned,"); 1383 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1384 seq_puts(m, " SSD,"); 1385 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1386 seq_puts(m, " TRIM-support,"); 1387 1388 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1389 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1390 if (tcon->perf_sector_size) 1391 seq_printf(m, "\tOptimal sector size: 0x%x", 1392 tcon->perf_sector_size); 1393 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1394 } 1395 1396 static void 1397 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1398 { 1399 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1400 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1401 1402 /* 1403 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1404 * totals (requests sent) since those SMBs are per-session not per tcon 1405 */ 1406 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1407 (long long)(tcon->bytes_read), 1408 (long long)(tcon->bytes_written)); 1409 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1410 atomic_read(&tcon->num_local_opens), 1411 atomic_read(&tcon->num_remote_opens)); 1412 seq_printf(m, "\nTreeConnects: %d total %d failed", 1413 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1414 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1415 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1416 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1417 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1418 seq_printf(m, "\nCreates: %d total %d failed", 1419 atomic_read(&sent[SMB2_CREATE_HE]), 1420 atomic_read(&failed[SMB2_CREATE_HE])); 1421 seq_printf(m, "\nCloses: %d total %d failed", 1422 atomic_read(&sent[SMB2_CLOSE_HE]), 1423 atomic_read(&failed[SMB2_CLOSE_HE])); 1424 seq_printf(m, "\nFlushes: %d total %d failed", 1425 atomic_read(&sent[SMB2_FLUSH_HE]), 1426 atomic_read(&failed[SMB2_FLUSH_HE])); 1427 seq_printf(m, "\nReads: %d total %d failed", 1428 atomic_read(&sent[SMB2_READ_HE]), 1429 atomic_read(&failed[SMB2_READ_HE])); 1430 seq_printf(m, "\nWrites: %d total %d failed", 1431 atomic_read(&sent[SMB2_WRITE_HE]), 1432 atomic_read(&failed[SMB2_WRITE_HE])); 1433 seq_printf(m, "\nLocks: %d total %d failed", 1434 atomic_read(&sent[SMB2_LOCK_HE]), 1435 atomic_read(&failed[SMB2_LOCK_HE])); 1436 seq_printf(m, "\nIOCTLs: %d total %d failed", 1437 atomic_read(&sent[SMB2_IOCTL_HE]), 1438 atomic_read(&failed[SMB2_IOCTL_HE])); 1439 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1440 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1441 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1442 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1443 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1444 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1445 seq_printf(m, "\nQueryInfos: %d total %d failed", 1446 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1447 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1448 seq_printf(m, "\nSetInfos: %d total %d failed", 1449 atomic_read(&sent[SMB2_SET_INFO_HE]), 1450 atomic_read(&failed[SMB2_SET_INFO_HE])); 1451 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1452 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1453 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1454 } 1455 1456 static void 1457 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1458 { 1459 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1460 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1461 1462 cfile->fid.persistent_fid = fid->persistent_fid; 1463 cfile->fid.volatile_fid = fid->volatile_fid; 1464 cfile->fid.access = fid->access; 1465 #ifdef CONFIG_CIFS_DEBUG2 1466 cfile->fid.mid = fid->mid; 1467 #endif /* CIFS_DEBUG2 */ 1468 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1469 &fid->purge_cache); 1470 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1471 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1472 } 1473 1474 static int 1475 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1476 struct cifs_fid *fid) 1477 { 1478 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1479 } 1480 1481 static int 1482 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1483 struct cifsFileInfo *cfile) 1484 { 1485 struct smb2_file_network_open_info file_inf; 1486 struct inode *inode; 1487 int rc; 1488 1489 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1490 cfile->fid.volatile_fid, &file_inf); 1491 if (rc) 1492 return rc; 1493 1494 inode = d_inode(cfile->dentry); 1495 1496 spin_lock(&inode->i_lock); 1497 CIFS_I(inode)->time = jiffies; 1498 1499 /* Creation time should not need to be updated on close */ 1500 if (file_inf.LastWriteTime) 1501 inode_set_mtime_to_ts(inode, 1502 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1503 if (file_inf.ChangeTime) 1504 inode_set_ctime_to_ts(inode, 1505 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1506 if (file_inf.LastAccessTime) 1507 inode_set_atime_to_ts(inode, 1508 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1509 1510 /* 1511 * i_blocks is not related to (i_size / i_blksize), 1512 * but instead 512 byte (2**9) size is required for 1513 * calculating num blocks. 1514 */ 1515 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1516 inode->i_blocks = 1517 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1518 1519 /* End of file and Attributes should not have to be updated on close */ 1520 spin_unlock(&inode->i_lock); 1521 return rc; 1522 } 1523 1524 static int 1525 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1526 u64 persistent_fid, u64 volatile_fid, 1527 struct copychunk_ioctl *pcchunk) 1528 { 1529 int rc; 1530 unsigned int ret_data_len; 1531 struct resume_key_req *res_key; 1532 1533 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1534 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1535 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1536 1537 if (rc == -EOPNOTSUPP) { 1538 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1539 goto req_res_key_exit; 1540 } else if (rc) { 1541 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1542 goto req_res_key_exit; 1543 } 1544 if (ret_data_len < sizeof(struct resume_key_req)) { 1545 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1546 rc = -EINVAL; 1547 goto req_res_key_exit; 1548 } 1549 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1550 1551 req_res_key_exit: 1552 kfree(res_key); 1553 return rc; 1554 } 1555 1556 static int 1557 smb2_ioctl_query_info(const unsigned int xid, 1558 struct cifs_tcon *tcon, 1559 struct cifs_sb_info *cifs_sb, 1560 __le16 *path, int is_dir, 1561 unsigned long p) 1562 { 1563 struct smb2_compound_vars *vars; 1564 struct smb_rqst *rqst; 1565 struct kvec *rsp_iov; 1566 struct cifs_ses *ses = tcon->ses; 1567 struct TCP_Server_Info *server; 1568 char __user *arg = (char __user *)p; 1569 struct smb_query_info qi; 1570 struct smb_query_info __user *pqi; 1571 int rc = 0; 1572 int flags = CIFS_CP_CREATE_CLOSE_OP; 1573 struct smb2_query_info_rsp *qi_rsp = NULL; 1574 struct smb2_ioctl_rsp *io_rsp = NULL; 1575 void *buffer = NULL; 1576 int resp_buftype[3]; 1577 struct cifs_open_parms oparms; 1578 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1579 struct cifs_fid fid; 1580 unsigned int size[2]; 1581 void *data[2]; 1582 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1583 void (*free_req1_func)(struct smb_rqst *r); 1584 int retries = 0, cur_sleep = 1; 1585 1586 replay_again: 1587 /* reinitialize for possible replay */ 1588 flags = CIFS_CP_CREATE_CLOSE_OP; 1589 oplock = SMB2_OPLOCK_LEVEL_NONE; 1590 server = cifs_pick_channel(ses); 1591 1592 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1593 if (vars == NULL) 1594 return -ENOMEM; 1595 rqst = &vars->rqst[0]; 1596 rsp_iov = &vars->rsp_iov[0]; 1597 1598 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1599 1600 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1601 rc = -EFAULT; 1602 goto free_vars; 1603 } 1604 if (qi.output_buffer_length > 1024) { 1605 rc = -EINVAL; 1606 goto free_vars; 1607 } 1608 1609 if (!ses || !server) { 1610 rc = -EIO; 1611 goto free_vars; 1612 } 1613 1614 if (smb3_encryption_required(tcon)) 1615 flags |= CIFS_TRANSFORM_REQ; 1616 1617 if (qi.output_buffer_length) { 1618 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1619 if (IS_ERR(buffer)) { 1620 rc = PTR_ERR(buffer); 1621 goto free_vars; 1622 } 1623 } 1624 1625 /* Open */ 1626 rqst[0].rq_iov = &vars->open_iov[0]; 1627 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1628 1629 oparms = (struct cifs_open_parms) { 1630 .tcon = tcon, 1631 .disposition = FILE_OPEN, 1632 .create_options = cifs_create_options(cifs_sb, create_options), 1633 .fid = &fid, 1634 .replay = !!(retries), 1635 }; 1636 1637 if (qi.flags & PASSTHRU_FSCTL) { 1638 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1639 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1640 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1641 break; 1642 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1643 oparms.desired_access = GENERIC_ALL; 1644 break; 1645 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1646 oparms.desired_access = GENERIC_READ; 1647 break; 1648 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1649 oparms.desired_access = GENERIC_WRITE; 1650 break; 1651 } 1652 } else if (qi.flags & PASSTHRU_SET_INFO) { 1653 oparms.desired_access = GENERIC_WRITE; 1654 } else { 1655 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1656 } 1657 1658 rc = SMB2_open_init(tcon, server, 1659 &rqst[0], &oplock, &oparms, path); 1660 if (rc) 1661 goto free_output_buffer; 1662 smb2_set_next_command(tcon, &rqst[0]); 1663 1664 /* Query */ 1665 if (qi.flags & PASSTHRU_FSCTL) { 1666 /* Can eventually relax perm check since server enforces too */ 1667 if (!capable(CAP_SYS_ADMIN)) { 1668 rc = -EPERM; 1669 goto free_open_req; 1670 } 1671 rqst[1].rq_iov = &vars->io_iov[0]; 1672 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1673 1674 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1675 qi.info_type, buffer, qi.output_buffer_length, 1676 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1677 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1678 free_req1_func = SMB2_ioctl_free; 1679 } else if (qi.flags == PASSTHRU_SET_INFO) { 1680 /* Can eventually relax perm check since server enforces too */ 1681 if (!capable(CAP_SYS_ADMIN)) { 1682 rc = -EPERM; 1683 goto free_open_req; 1684 } 1685 if (qi.output_buffer_length < 8) { 1686 rc = -EINVAL; 1687 goto free_open_req; 1688 } 1689 rqst[1].rq_iov = vars->si_iov; 1690 rqst[1].rq_nvec = 1; 1691 1692 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1693 size[0] = 8; 1694 data[0] = buffer; 1695 1696 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1697 current->tgid, FILE_END_OF_FILE_INFORMATION, 1698 SMB2_O_INFO_FILE, 0, data, size); 1699 free_req1_func = SMB2_set_info_free; 1700 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1701 rqst[1].rq_iov = &vars->qi_iov; 1702 rqst[1].rq_nvec = 1; 1703 1704 rc = SMB2_query_info_init(tcon, server, 1705 &rqst[1], COMPOUND_FID, 1706 COMPOUND_FID, qi.file_info_class, 1707 qi.info_type, qi.additional_information, 1708 qi.input_buffer_length, 1709 qi.output_buffer_length, buffer); 1710 free_req1_func = SMB2_query_info_free; 1711 } else { /* unknown flags */ 1712 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1713 qi.flags); 1714 rc = -EINVAL; 1715 } 1716 1717 if (rc) 1718 goto free_open_req; 1719 smb2_set_next_command(tcon, &rqst[1]); 1720 smb2_set_related(&rqst[1]); 1721 1722 /* Close */ 1723 rqst[2].rq_iov = &vars->close_iov; 1724 rqst[2].rq_nvec = 1; 1725 1726 rc = SMB2_close_init(tcon, server, 1727 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1728 if (rc) 1729 goto free_req_1; 1730 smb2_set_related(&rqst[2]); 1731 1732 if (retries) { 1733 smb2_set_replay(server, &rqst[0]); 1734 smb2_set_replay(server, &rqst[1]); 1735 smb2_set_replay(server, &rqst[2]); 1736 } 1737 1738 rc = compound_send_recv(xid, ses, server, 1739 flags, 3, rqst, 1740 resp_buftype, rsp_iov); 1741 if (rc) 1742 goto out; 1743 1744 /* No need to bump num_remote_opens since handle immediately closed */ 1745 if (qi.flags & PASSTHRU_FSCTL) { 1746 pqi = (struct smb_query_info __user *)arg; 1747 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1748 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1749 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1750 if (qi.input_buffer_length > 0 && 1751 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1752 > rsp_iov[1].iov_len) { 1753 rc = -EFAULT; 1754 goto out; 1755 } 1756 1757 if (copy_to_user(&pqi->input_buffer_length, 1758 &qi.input_buffer_length, 1759 sizeof(qi.input_buffer_length))) { 1760 rc = -EFAULT; 1761 goto out; 1762 } 1763 1764 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1765 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1766 qi.input_buffer_length)) 1767 rc = -EFAULT; 1768 } else { 1769 pqi = (struct smb_query_info __user *)arg; 1770 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1771 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1772 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1773 if (copy_to_user(&pqi->input_buffer_length, 1774 &qi.input_buffer_length, 1775 sizeof(qi.input_buffer_length))) { 1776 rc = -EFAULT; 1777 goto out; 1778 } 1779 1780 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1781 qi.input_buffer_length)) 1782 rc = -EFAULT; 1783 } 1784 1785 out: 1786 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1787 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1788 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1789 SMB2_close_free(&rqst[2]); 1790 free_req_1: 1791 free_req1_func(&rqst[1]); 1792 free_open_req: 1793 SMB2_open_free(&rqst[0]); 1794 free_output_buffer: 1795 kfree(buffer); 1796 free_vars: 1797 kfree(vars); 1798 1799 if (is_replayable_error(rc) && 1800 smb2_should_replay(tcon, &retries, &cur_sleep)) 1801 goto replay_again; 1802 1803 return rc; 1804 } 1805 1806 /** 1807 * calc_chunk_count - calculates the number chunks to be filled in the Chunks[] 1808 * array of struct copychunk_ioctl 1809 * 1810 * @tcon: destination file tcon 1811 * @bytes_left: how many bytes are left to copy 1812 * 1813 * Return: maximum number of chunks with which Chunks[] can be filled. 1814 */ 1815 static inline u32 1816 calc_chunk_count(struct cifs_tcon *tcon, u64 bytes_left) 1817 { 1818 u32 max_chunks = READ_ONCE(tcon->max_chunks); 1819 u32 max_bytes_copy = READ_ONCE(tcon->max_bytes_copy); 1820 u32 max_bytes_chunk = READ_ONCE(tcon->max_bytes_chunk); 1821 u64 need; 1822 u32 allowed; 1823 1824 if (!max_bytes_chunk || !max_bytes_copy || !max_chunks) 1825 return 0; 1826 1827 /* chunks needed for the remaining bytes */ 1828 need = DIV_ROUND_UP_ULL(bytes_left, max_bytes_chunk); 1829 /* chunks allowed per cc request */ 1830 allowed = DIV_ROUND_UP(max_bytes_copy, max_bytes_chunk); 1831 1832 return (u32)umin(need, umin(max_chunks, allowed)); 1833 } 1834 1835 /** 1836 * smb2_copychunk_range - server-side copy of data range 1837 * 1838 * @xid: transaction id 1839 * @src_file: source file 1840 * @dst_file: destination file 1841 * @src_off: source file byte offset 1842 * @len: number of bytes to copy 1843 * @dst_off: destination file byte offset 1844 * 1845 * Obtains a resume key for @src_file and issues FSCTL_SRV_COPYCHUNK_WRITE 1846 * IOCTLs, splitting the request into chunks limited by tcon->max_*. 1847 * 1848 * Return: @len on success; negative errno on failure. 1849 */ 1850 static ssize_t 1851 smb2_copychunk_range(const unsigned int xid, 1852 struct cifsFileInfo *src_file, 1853 struct cifsFileInfo *dst_file, 1854 u64 src_off, 1855 u64 len, 1856 u64 dst_off) 1857 { 1858 int rc = 0; 1859 unsigned int ret_data_len = 0; 1860 struct copychunk_ioctl *cc_req = NULL; 1861 struct copychunk_ioctl_rsp *cc_rsp = NULL; 1862 struct cifs_tcon *tcon; 1863 struct copychunk *chunk; 1864 u32 chunks, chunk_count, chunk_bytes; 1865 u32 copy_bytes, copy_bytes_left; 1866 u32 chunks_written, bytes_written; 1867 u64 total_bytes_left = len; 1868 u64 src_off_prev, dst_off_prev; 1869 u32 retries = 0; 1870 1871 tcon = tlink_tcon(dst_file->tlink); 1872 1873 trace_smb3_copychunk_enter(xid, src_file->fid.volatile_fid, 1874 dst_file->fid.volatile_fid, tcon->tid, 1875 tcon->ses->Suid, src_off, dst_off, len); 1876 1877 retry: 1878 chunk_count = calc_chunk_count(tcon, total_bytes_left); 1879 if (!chunk_count) { 1880 rc = -EOPNOTSUPP; 1881 goto out; 1882 } 1883 1884 cc_req = kzalloc(struct_size(cc_req, Chunks, chunk_count), GFP_KERNEL); 1885 if (!cc_req) { 1886 rc = -ENOMEM; 1887 goto out; 1888 } 1889 1890 /* Request a key from the server to identify the source of the copy */ 1891 rc = SMB2_request_res_key(xid, 1892 tlink_tcon(src_file->tlink), 1893 src_file->fid.persistent_fid, 1894 src_file->fid.volatile_fid, 1895 cc_req); 1896 1897 /* Note: request_res_key sets res_key null only if rc != 0 */ 1898 if (rc) 1899 goto out; 1900 1901 while (total_bytes_left > 0) { 1902 1903 /* Store previous offsets to allow rewind */ 1904 src_off_prev = src_off; 1905 dst_off_prev = dst_off; 1906 1907 chunks = 0; 1908 copy_bytes = 0; 1909 copy_bytes_left = umin(total_bytes_left, tcon->max_bytes_copy); 1910 while (copy_bytes_left > 0 && chunks < chunk_count) { 1911 chunk = &cc_req->Chunks[chunks++]; 1912 1913 chunk->SourceOffset = cpu_to_le64(src_off); 1914 chunk->TargetOffset = cpu_to_le64(dst_off); 1915 1916 chunk_bytes = umin(copy_bytes_left, tcon->max_bytes_chunk); 1917 1918 chunk->Length = cpu_to_le32(chunk_bytes); 1919 /* Buffer is zeroed, no need to set chunk->Reserved = 0 */ 1920 1921 src_off += chunk_bytes; 1922 dst_off += chunk_bytes; 1923 1924 copy_bytes_left -= chunk_bytes; 1925 copy_bytes += chunk_bytes; 1926 } 1927 1928 cc_req->ChunkCount = cpu_to_le32(chunks); 1929 /* Buffer is zeroed, no need to set cc_req->Reserved = 0 */ 1930 1931 /* Request server copy to target from src identified by key */ 1932 kfree(cc_rsp); 1933 cc_rsp = NULL; 1934 rc = SMB2_ioctl(xid, tcon, dst_file->fid.persistent_fid, 1935 dst_file->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1936 (char *)cc_req, struct_size(cc_req, Chunks, chunks), 1937 CIFSMaxBufSize, (char **)&cc_rsp, &ret_data_len); 1938 1939 if (rc && rc != -EINVAL) 1940 goto out; 1941 1942 if (unlikely(ret_data_len != sizeof(*cc_rsp))) { 1943 cifs_tcon_dbg(VFS, "Copychunk invalid response: size %u/%zu\n", 1944 ret_data_len, sizeof(*cc_rsp)); 1945 rc = -EIO; 1946 goto out; 1947 } 1948 1949 bytes_written = le32_to_cpu(cc_rsp->TotalBytesWritten); 1950 chunks_written = le32_to_cpu(cc_rsp->ChunksWritten); 1951 chunk_bytes = le32_to_cpu(cc_rsp->ChunkBytesWritten); 1952 1953 if (rc == 0) { 1954 /* Check if server claimed to write more than we asked */ 1955 if (unlikely(!bytes_written || bytes_written > copy_bytes || 1956 !chunks_written || chunks_written > chunks)) { 1957 cifs_tcon_dbg(VFS, "Copychunk invalid response: bytes written %u/%u, chunks written %u/%u\n", 1958 bytes_written, copy_bytes, chunks_written, chunks); 1959 rc = -EIO; 1960 goto out; 1961 } 1962 1963 /* Partial write: rewind */ 1964 if (bytes_written < copy_bytes) { 1965 u32 delta = copy_bytes - bytes_written; 1966 1967 src_off -= delta; 1968 dst_off -= delta; 1969 } 1970 1971 total_bytes_left -= bytes_written; 1972 continue; 1973 } 1974 1975 /* 1976 * Check if server is not asking us to reduce size. 1977 * 1978 * Note: As per MS-SMB2 2.2.32.1, the values returned 1979 * in cc_rsp are not strictly lower than what existed 1980 * before. 1981 */ 1982 if (bytes_written < tcon->max_bytes_copy) { 1983 cifs_tcon_dbg(FYI, "Copychunk MaxBytesCopy updated: %u -> %u\n", 1984 tcon->max_bytes_copy, bytes_written); 1985 tcon->max_bytes_copy = bytes_written; 1986 } 1987 1988 if (chunks_written < tcon->max_chunks) { 1989 cifs_tcon_dbg(FYI, "Copychunk MaxChunks updated: %u -> %u\n", 1990 tcon->max_chunks, chunks_written); 1991 tcon->max_chunks = chunks_written; 1992 } 1993 1994 if (chunk_bytes < tcon->max_bytes_chunk) { 1995 cifs_tcon_dbg(FYI, "Copychunk MaxBytesChunk updated: %u -> %u\n", 1996 tcon->max_bytes_chunk, chunk_bytes); 1997 tcon->max_bytes_chunk = chunk_bytes; 1998 } 1999 2000 /* reset to last offsets */ 2001 if (retries++ < 2) { 2002 src_off = src_off_prev; 2003 dst_off = dst_off_prev; 2004 kfree(cc_req); 2005 cc_req = NULL; 2006 goto retry; 2007 } 2008 2009 break; 2010 } 2011 2012 out: 2013 kfree(cc_req); 2014 kfree(cc_rsp); 2015 if (rc) { 2016 trace_smb3_copychunk_err(xid, src_file->fid.volatile_fid, 2017 dst_file->fid.volatile_fid, tcon->tid, 2018 tcon->ses->Suid, src_off, dst_off, len, rc); 2019 return rc; 2020 } else { 2021 trace_smb3_copychunk_done(xid, src_file->fid.volatile_fid, 2022 dst_file->fid.volatile_fid, tcon->tid, 2023 tcon->ses->Suid, src_off, dst_off, len); 2024 return len; 2025 } 2026 } 2027 2028 static int 2029 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 2030 struct cifs_fid *fid) 2031 { 2032 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2033 } 2034 2035 static unsigned int 2036 smb2_read_data_offset(char *buf) 2037 { 2038 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 2039 2040 return rsp->DataOffset; 2041 } 2042 2043 static unsigned int 2044 smb2_read_data_length(char *buf, bool in_remaining) 2045 { 2046 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 2047 2048 if (in_remaining) 2049 return le32_to_cpu(rsp->DataRemaining); 2050 2051 return le32_to_cpu(rsp->DataLength); 2052 } 2053 2054 2055 static int 2056 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 2057 struct cifs_io_parms *parms, unsigned int *bytes_read, 2058 char **buf, int *buf_type) 2059 { 2060 parms->persistent_fid = pfid->persistent_fid; 2061 parms->volatile_fid = pfid->volatile_fid; 2062 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 2063 } 2064 2065 static int 2066 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 2067 struct cifs_io_parms *parms, unsigned int *written, 2068 struct kvec *iov, unsigned long nr_segs) 2069 { 2070 2071 parms->persistent_fid = pfid->persistent_fid; 2072 parms->volatile_fid = pfid->volatile_fid; 2073 return SMB2_write(xid, parms, written, iov, nr_segs); 2074 } 2075 2076 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 2077 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 2078 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 2079 { 2080 struct cifsInodeInfo *cifsi; 2081 int rc; 2082 2083 cifsi = CIFS_I(inode); 2084 2085 /* if file already sparse don't bother setting sparse again */ 2086 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 2087 return true; /* already sparse */ 2088 2089 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 2090 return true; /* already not sparse */ 2091 2092 /* 2093 * Can't check for sparse support on share the usual way via the 2094 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 2095 * since Samba server doesn't set the flag on the share, yet 2096 * supports the set sparse FSCTL and returns sparse correctly 2097 * in the file attributes. If we fail setting sparse though we 2098 * mark that server does not support sparse files for this share 2099 * to avoid repeatedly sending the unsupported fsctl to server 2100 * if the file is repeatedly extended. 2101 */ 2102 if (tcon->broken_sparse_sup) 2103 return false; 2104 2105 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2106 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 2107 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 2108 if (rc) { 2109 tcon->broken_sparse_sup = true; 2110 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 2111 return false; 2112 } 2113 2114 if (setsparse) 2115 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 2116 else 2117 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 2118 2119 return true; 2120 } 2121 2122 static int 2123 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 2124 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 2125 { 2126 struct inode *inode; 2127 2128 /* 2129 * If extending file more than one page make sparse. Many Linux fs 2130 * make files sparse by default when extending via ftruncate 2131 */ 2132 inode = d_inode(cfile->dentry); 2133 2134 if (!set_alloc && (size > inode->i_size + 8192)) { 2135 __u8 set_sparse = 1; 2136 2137 /* whether set sparse succeeds or not, extend the file */ 2138 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 2139 } 2140 2141 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 2142 cfile->fid.volatile_fid, cfile->pid, size); 2143 } 2144 2145 static int 2146 smb2_duplicate_extents(const unsigned int xid, 2147 struct cifsFileInfo *srcfile, 2148 struct cifsFileInfo *trgtfile, u64 src_off, 2149 u64 len, u64 dest_off) 2150 { 2151 int rc; 2152 unsigned int ret_data_len; 2153 struct inode *inode; 2154 struct duplicate_extents_to_file dup_ext_buf; 2155 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2156 2157 /* server fileays advertise duplicate extent support with this flag */ 2158 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2159 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2160 return -EOPNOTSUPP; 2161 2162 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2163 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2164 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2165 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2166 dup_ext_buf.ByteCount = cpu_to_le64(len); 2167 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2168 src_off, dest_off, len); 2169 trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid, 2170 trgtfile->fid.volatile_fid, tcon->tid, 2171 tcon->ses->Suid, src_off, dest_off, len); 2172 inode = d_inode(trgtfile->dentry); 2173 if (inode->i_size < dest_off + len) { 2174 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2175 if (rc) 2176 goto duplicate_extents_out; 2177 2178 /* 2179 * Although also could set plausible allocation size (i_blocks) 2180 * here in addition to setting the file size, in reflink 2181 * it is likely that the target file is sparse. Its allocation 2182 * size will be queried on next revalidate, but it is important 2183 * to make sure that file's cached size is updated immediately 2184 */ 2185 netfs_resize_file(netfs_inode(inode), dest_off + len, true); 2186 cifs_setsize(inode, dest_off + len); 2187 } 2188 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2189 trgtfile->fid.volatile_fid, 2190 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2191 (char *)&dup_ext_buf, 2192 sizeof(struct duplicate_extents_to_file), 2193 CIFSMaxBufSize, NULL, 2194 &ret_data_len); 2195 2196 if (ret_data_len > 0) 2197 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2198 2199 duplicate_extents_out: 2200 if (rc) 2201 trace_smb3_clone_err(xid, srcfile->fid.volatile_fid, 2202 trgtfile->fid.volatile_fid, 2203 tcon->tid, tcon->ses->Suid, src_off, 2204 dest_off, len, rc); 2205 else 2206 trace_smb3_clone_done(xid, srcfile->fid.volatile_fid, 2207 trgtfile->fid.volatile_fid, tcon->tid, 2208 tcon->ses->Suid, src_off, dest_off, len); 2209 return rc; 2210 } 2211 2212 static int 2213 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2214 struct cifsFileInfo *cfile) 2215 { 2216 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2217 cfile->fid.volatile_fid); 2218 } 2219 2220 static int 2221 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2222 struct cifsFileInfo *cfile) 2223 { 2224 struct fsctl_set_integrity_information_req integr_info; 2225 unsigned int ret_data_len; 2226 2227 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2228 integr_info.Flags = 0; 2229 integr_info.Reserved = 0; 2230 2231 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2232 cfile->fid.volatile_fid, 2233 FSCTL_SET_INTEGRITY_INFORMATION, 2234 (char *)&integr_info, 2235 sizeof(struct fsctl_set_integrity_information_req), 2236 CIFSMaxBufSize, NULL, 2237 &ret_data_len); 2238 2239 } 2240 2241 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2242 #define GMT_TOKEN_SIZE 50 2243 2244 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2245 2246 /* 2247 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2248 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2249 */ 2250 static int 2251 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2252 struct cifsFileInfo *cfile, void __user *ioc_buf) 2253 { 2254 char *retbuf = NULL; 2255 unsigned int ret_data_len = 0; 2256 int rc; 2257 u32 max_response_size; 2258 struct smb_snapshot_array snapshot_in; 2259 2260 /* 2261 * On the first query to enumerate the list of snapshots available 2262 * for this volume the buffer begins with 0 (number of snapshots 2263 * which can be returned is zero since at that point we do not know 2264 * how big the buffer needs to be). On the second query, 2265 * it (ret_data_len) is set to number of snapshots so we can 2266 * know to set the maximum response size larger (see below). 2267 */ 2268 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2269 return -EFAULT; 2270 2271 /* 2272 * Note that for snapshot queries that servers like Azure expect that 2273 * the first query be minimal size (and just used to get the number/size 2274 * of previous versions) so response size must be specified as EXACTLY 2275 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2276 * of eight bytes. 2277 */ 2278 if (ret_data_len == 0) 2279 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2280 else 2281 max_response_size = CIFSMaxBufSize; 2282 2283 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2284 cfile->fid.volatile_fid, 2285 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2286 NULL, 0 /* no input data */, max_response_size, 2287 (char **)&retbuf, 2288 &ret_data_len); 2289 cifs_dbg(FYI, "enum snapshots ioctl returned %d and ret buflen is %d\n", 2290 rc, ret_data_len); 2291 if (rc) 2292 return rc; 2293 2294 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2295 /* Fixup buffer */ 2296 if (copy_from_user(&snapshot_in, ioc_buf, 2297 sizeof(struct smb_snapshot_array))) { 2298 rc = -EFAULT; 2299 kfree(retbuf); 2300 return rc; 2301 } 2302 2303 /* 2304 * Check for min size, ie not large enough to fit even one GMT 2305 * token (snapshot). On the first ioctl some users may pass in 2306 * smaller size (or zero) to simply get the size of the array 2307 * so the user space caller can allocate sufficient memory 2308 * and retry the ioctl again with larger array size sufficient 2309 * to hold all of the snapshot GMT tokens on the second try. 2310 */ 2311 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2312 ret_data_len = sizeof(struct smb_snapshot_array); 2313 2314 /* 2315 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2316 * the snapshot array (of 50 byte GMT tokens) each 2317 * representing an available previous version of the data 2318 */ 2319 if (ret_data_len > (snapshot_in.snapshot_array_size + 2320 sizeof(struct smb_snapshot_array))) 2321 ret_data_len = snapshot_in.snapshot_array_size + 2322 sizeof(struct smb_snapshot_array); 2323 2324 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2325 rc = -EFAULT; 2326 } 2327 2328 kfree(retbuf); 2329 return rc; 2330 } 2331 2332 2333 2334 static int 2335 smb3_notify(const unsigned int xid, struct file *pfile, 2336 void __user *ioc_buf, bool return_changes) 2337 { 2338 struct smb3_notify_info notify; 2339 struct smb3_notify_info __user *pnotify_buf; 2340 struct dentry *dentry = pfile->f_path.dentry; 2341 struct inode *inode = file_inode(pfile); 2342 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2343 struct cifs_open_parms oparms; 2344 struct cifs_fid fid; 2345 struct cifs_tcon *tcon; 2346 const unsigned char *path; 2347 char *returned_ioctl_info = NULL; 2348 void *page = alloc_dentry_path(); 2349 __le16 *utf16_path = NULL; 2350 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2351 int rc = 0; 2352 __u32 ret_len = 0; 2353 2354 path = build_path_from_dentry(dentry, page); 2355 if (IS_ERR(path)) { 2356 rc = PTR_ERR(path); 2357 goto notify_exit; 2358 } 2359 2360 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2361 if (utf16_path == NULL) { 2362 rc = -ENOMEM; 2363 goto notify_exit; 2364 } 2365 2366 if (return_changes) { 2367 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2368 rc = -EFAULT; 2369 goto notify_exit; 2370 } 2371 } else { 2372 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2373 rc = -EFAULT; 2374 goto notify_exit; 2375 } 2376 notify.data_len = 0; 2377 } 2378 2379 tcon = cifs_sb_master_tcon(cifs_sb); 2380 oparms = (struct cifs_open_parms) { 2381 .tcon = tcon, 2382 .path = path, 2383 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2384 .disposition = FILE_OPEN, 2385 .create_options = cifs_create_options(cifs_sb, 0), 2386 .fid = &fid, 2387 }; 2388 2389 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2390 NULL); 2391 if (rc) 2392 goto notify_exit; 2393 2394 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2395 notify.watch_tree, notify.completion_filter, 2396 notify.data_len, &returned_ioctl_info, &ret_len); 2397 2398 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2399 2400 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2401 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2402 if (ret_len > notify.data_len) 2403 ret_len = notify.data_len; 2404 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2405 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2406 rc = -EFAULT; 2407 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2408 rc = -EFAULT; 2409 } 2410 kfree(returned_ioctl_info); 2411 notify_exit: 2412 free_dentry_path(page); 2413 kfree(utf16_path); 2414 return rc; 2415 } 2416 2417 static int 2418 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2419 const char *path, struct cifs_sb_info *cifs_sb, 2420 struct cifs_fid *fid, __u16 search_flags, 2421 struct cifs_search_info *srch_inf) 2422 { 2423 __le16 *utf16_path; 2424 struct smb_rqst rqst[2]; 2425 struct kvec rsp_iov[2]; 2426 int resp_buftype[2]; 2427 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2428 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2429 int rc, flags = 0; 2430 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2431 struct cifs_open_parms oparms; 2432 struct smb2_query_directory_rsp *qd_rsp = NULL; 2433 struct smb2_create_rsp *op_rsp = NULL; 2434 struct TCP_Server_Info *server; 2435 int retries = 0, cur_sleep = 1; 2436 2437 replay_again: 2438 /* reinitialize for possible replay */ 2439 flags = 0; 2440 oplock = SMB2_OPLOCK_LEVEL_NONE; 2441 server = cifs_pick_channel(tcon->ses); 2442 2443 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2444 if (!utf16_path) 2445 return -ENOMEM; 2446 2447 if (smb3_encryption_required(tcon)) 2448 flags |= CIFS_TRANSFORM_REQ; 2449 2450 memset(rqst, 0, sizeof(rqst)); 2451 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2452 memset(rsp_iov, 0, sizeof(rsp_iov)); 2453 2454 /* Open */ 2455 memset(&open_iov, 0, sizeof(open_iov)); 2456 rqst[0].rq_iov = open_iov; 2457 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2458 2459 oparms = (struct cifs_open_parms) { 2460 .tcon = tcon, 2461 .path = path, 2462 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2463 .disposition = FILE_OPEN, 2464 .create_options = cifs_create_options(cifs_sb, 0), 2465 .fid = fid, 2466 .replay = !!(retries), 2467 }; 2468 2469 rc = SMB2_open_init(tcon, server, 2470 &rqst[0], &oplock, &oparms, utf16_path); 2471 if (rc) 2472 goto qdf_free; 2473 smb2_set_next_command(tcon, &rqst[0]); 2474 2475 /* Query directory */ 2476 srch_inf->entries_in_buffer = 0; 2477 srch_inf->index_of_last_entry = 2; 2478 2479 memset(&qd_iov, 0, sizeof(qd_iov)); 2480 rqst[1].rq_iov = qd_iov; 2481 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2482 2483 rc = SMB2_query_directory_init(xid, tcon, server, 2484 &rqst[1], 2485 COMPOUND_FID, COMPOUND_FID, 2486 0, srch_inf->info_level); 2487 if (rc) 2488 goto qdf_free; 2489 2490 smb2_set_related(&rqst[1]); 2491 2492 if (retries) { 2493 smb2_set_replay(server, &rqst[0]); 2494 smb2_set_replay(server, &rqst[1]); 2495 } 2496 2497 rc = compound_send_recv(xid, tcon->ses, server, 2498 flags, 2, rqst, 2499 resp_buftype, rsp_iov); 2500 2501 /* If the open failed there is nothing to do */ 2502 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2503 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2504 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2505 goto qdf_free; 2506 } 2507 fid->persistent_fid = op_rsp->PersistentFileId; 2508 fid->volatile_fid = op_rsp->VolatileFileId; 2509 2510 /* Anything else than ENODATA means a genuine error */ 2511 if (rc && rc != -ENODATA) { 2512 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2513 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2514 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2515 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2516 goto qdf_free; 2517 } 2518 2519 atomic_inc(&tcon->num_remote_opens); 2520 2521 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2522 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2523 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2524 tcon->tid, tcon->ses->Suid, 0, 0); 2525 srch_inf->endOfSearch = true; 2526 rc = 0; 2527 goto qdf_free; 2528 } 2529 2530 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2531 srch_inf); 2532 if (rc) { 2533 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2534 tcon->ses->Suid, 0, 0, rc); 2535 goto qdf_free; 2536 } 2537 resp_buftype[1] = CIFS_NO_BUFFER; 2538 2539 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2540 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2541 2542 qdf_free: 2543 kfree(utf16_path); 2544 SMB2_open_free(&rqst[0]); 2545 SMB2_query_directory_free(&rqst[1]); 2546 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2547 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2548 2549 if (is_replayable_error(rc) && 2550 smb2_should_replay(tcon, &retries, &cur_sleep)) 2551 goto replay_again; 2552 2553 return rc; 2554 } 2555 2556 static int 2557 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2558 struct cifs_fid *fid, __u16 search_flags, 2559 struct cifs_search_info *srch_inf) 2560 { 2561 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2562 fid->volatile_fid, 0, srch_inf); 2563 } 2564 2565 static int 2566 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2567 struct cifs_fid *fid) 2568 { 2569 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2570 } 2571 2572 /* 2573 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2574 * the number of credits and return true. Otherwise - return false. 2575 */ 2576 static bool 2577 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2578 { 2579 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2580 int scredits, in_flight; 2581 2582 if (shdr->Status != STATUS_PENDING) 2583 return false; 2584 2585 if (shdr->CreditRequest) { 2586 spin_lock(&server->req_lock); 2587 server->credits += le16_to_cpu(shdr->CreditRequest); 2588 scredits = server->credits; 2589 in_flight = server->in_flight; 2590 spin_unlock(&server->req_lock); 2591 wake_up(&server->request_q); 2592 2593 trace_smb3_pend_credits(server->current_mid, 2594 server->conn_id, server->hostname, scredits, 2595 le16_to_cpu(shdr->CreditRequest), in_flight); 2596 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2597 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2598 } 2599 2600 return true; 2601 } 2602 2603 static bool 2604 smb2_is_session_expired(char *buf) 2605 { 2606 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2607 2608 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2609 shdr->Status != STATUS_USER_SESSION_DELETED) 2610 return false; 2611 2612 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2613 le64_to_cpu(shdr->SessionId), 2614 le16_to_cpu(shdr->Command), 2615 le64_to_cpu(shdr->MessageId)); 2616 cifs_dbg(FYI, "Session expired or deleted\n"); 2617 2618 return true; 2619 } 2620 2621 static bool 2622 smb2_is_status_io_timeout(char *buf) 2623 { 2624 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2625 2626 if (shdr->Status == STATUS_IO_TIMEOUT) 2627 return true; 2628 else 2629 return false; 2630 } 2631 2632 static bool 2633 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2634 { 2635 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2636 struct TCP_Server_Info *pserver; 2637 struct cifs_ses *ses; 2638 struct cifs_tcon *tcon; 2639 2640 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2641 return false; 2642 2643 /* If server is a channel, select the primary channel */ 2644 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2645 2646 spin_lock(&cifs_tcp_ses_lock); 2647 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2648 if (cifs_ses_exiting(ses)) 2649 continue; 2650 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2651 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2652 spin_lock(&tcon->tc_lock); 2653 tcon->need_reconnect = true; 2654 spin_unlock(&tcon->tc_lock); 2655 spin_unlock(&cifs_tcp_ses_lock); 2656 pr_warn_once("Server share %s deleted.\n", 2657 tcon->tree_name); 2658 return true; 2659 } 2660 } 2661 } 2662 spin_unlock(&cifs_tcp_ses_lock); 2663 2664 return false; 2665 } 2666 2667 static int 2668 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2669 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2670 { 2671 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2672 return SMB2_lease_break(0, tcon, cinode->lease_key, 2673 smb2_get_lease_state(cinode)); 2674 2675 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2676 CIFS_CACHE_READ(cinode) ? 1 : 0); 2677 } 2678 2679 void 2680 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2681 { 2682 struct smb2_hdr *shdr; 2683 2684 if (server->dialect < SMB30_PROT_ID) 2685 return; 2686 2687 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2688 if (shdr == NULL) { 2689 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2690 return; 2691 } 2692 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2693 } 2694 2695 void 2696 smb2_set_related(struct smb_rqst *rqst) 2697 { 2698 struct smb2_hdr *shdr; 2699 2700 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2701 if (shdr == NULL) { 2702 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2703 return; 2704 } 2705 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2706 } 2707 2708 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2709 2710 void 2711 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2712 { 2713 struct smb2_hdr *shdr; 2714 struct cifs_ses *ses = tcon->ses; 2715 struct TCP_Server_Info *server = ses->server; 2716 unsigned long len = smb_rqst_len(server, rqst); 2717 int num_padding; 2718 2719 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2720 if (shdr == NULL) { 2721 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2722 return; 2723 } 2724 2725 /* SMB headers in a compound are 8 byte aligned. */ 2726 if (IS_ALIGNED(len, 8)) 2727 goto out; 2728 2729 num_padding = 8 - (len & 7); 2730 if (smb3_encryption_required(tcon)) { 2731 int i; 2732 2733 /* 2734 * Flatten request into a single buffer with required padding as 2735 * the encryption layer can't handle the padding iovs. 2736 */ 2737 for (i = 1; i < rqst->rq_nvec; i++) { 2738 memcpy(rqst->rq_iov[0].iov_base + 2739 rqst->rq_iov[0].iov_len, 2740 rqst->rq_iov[i].iov_base, 2741 rqst->rq_iov[i].iov_len); 2742 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2743 } 2744 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2745 0, num_padding); 2746 rqst->rq_iov[0].iov_len += num_padding; 2747 rqst->rq_nvec = 1; 2748 } else { 2749 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2750 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2751 rqst->rq_nvec++; 2752 } 2753 len += num_padding; 2754 out: 2755 shdr->NextCommand = cpu_to_le32(len); 2756 } 2757 2758 /* 2759 * helper function for exponential backoff and check if replayable 2760 */ 2761 bool smb2_should_replay(struct cifs_tcon *tcon, 2762 int *pretries, 2763 int *pcur_sleep) 2764 { 2765 if (!pretries || !pcur_sleep) 2766 return false; 2767 2768 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2769 msleep(*pcur_sleep); 2770 (*pcur_sleep) = ((*pcur_sleep) << 1); 2771 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2772 (*pcur_sleep) = CIFS_MAX_SLEEP; 2773 return true; 2774 } 2775 2776 return false; 2777 } 2778 2779 /* 2780 * Passes the query info response back to the caller on success. 2781 * Caller need to free this with free_rsp_buf(). 2782 */ 2783 int 2784 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2785 const char *path, u32 desired_access, 2786 u32 class, u32 type, u32 output_len, 2787 struct kvec *rsp, int *buftype, 2788 struct cifs_sb_info *cifs_sb) 2789 { 2790 struct smb2_compound_vars *vars; 2791 struct cifs_ses *ses = tcon->ses; 2792 struct TCP_Server_Info *server; 2793 int flags = CIFS_CP_CREATE_CLOSE_OP; 2794 struct smb_rqst *rqst; 2795 int resp_buftype[3]; 2796 struct kvec *rsp_iov; 2797 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2798 struct cifs_open_parms oparms; 2799 struct cifs_fid fid; 2800 int rc; 2801 __le16 *utf16_path; 2802 struct cached_fid *cfid = NULL; 2803 int retries = 0, cur_sleep = 1; 2804 2805 replay_again: 2806 /* reinitialize for possible replay */ 2807 flags = CIFS_CP_CREATE_CLOSE_OP; 2808 oplock = SMB2_OPLOCK_LEVEL_NONE; 2809 server = cifs_pick_channel(ses); 2810 2811 if (!path) 2812 path = ""; 2813 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2814 if (!utf16_path) 2815 return -ENOMEM; 2816 2817 if (smb3_encryption_required(tcon)) 2818 flags |= CIFS_TRANSFORM_REQ; 2819 2820 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2821 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2822 if (!vars) { 2823 rc = -ENOMEM; 2824 goto out_free_path; 2825 } 2826 rqst = vars->rqst; 2827 rsp_iov = vars->rsp_iov; 2828 2829 /* 2830 * We can only call this for things we know are directories. 2831 */ 2832 if (!strcmp(path, "")) 2833 open_cached_dir(xid, tcon, path, cifs_sb, false, 2834 &cfid); /* cfid null if open dir failed */ 2835 2836 rqst[0].rq_iov = vars->open_iov; 2837 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2838 2839 oparms = (struct cifs_open_parms) { 2840 .tcon = tcon, 2841 .path = path, 2842 .desired_access = desired_access, 2843 .disposition = FILE_OPEN, 2844 .create_options = cifs_create_options(cifs_sb, 0), 2845 .fid = &fid, 2846 .replay = !!(retries), 2847 }; 2848 2849 rc = SMB2_open_init(tcon, server, 2850 &rqst[0], &oplock, &oparms, utf16_path); 2851 if (rc) 2852 goto qic_exit; 2853 smb2_set_next_command(tcon, &rqst[0]); 2854 2855 rqst[1].rq_iov = &vars->qi_iov; 2856 rqst[1].rq_nvec = 1; 2857 2858 if (cfid) { 2859 rc = SMB2_query_info_init(tcon, server, 2860 &rqst[1], 2861 cfid->fid.persistent_fid, 2862 cfid->fid.volatile_fid, 2863 class, type, 0, 2864 output_len, 0, 2865 NULL); 2866 } else { 2867 rc = SMB2_query_info_init(tcon, server, 2868 &rqst[1], 2869 COMPOUND_FID, 2870 COMPOUND_FID, 2871 class, type, 0, 2872 output_len, 0, 2873 NULL); 2874 } 2875 if (rc) 2876 goto qic_exit; 2877 if (!cfid) { 2878 smb2_set_next_command(tcon, &rqst[1]); 2879 smb2_set_related(&rqst[1]); 2880 } 2881 2882 rqst[2].rq_iov = &vars->close_iov; 2883 rqst[2].rq_nvec = 1; 2884 2885 rc = SMB2_close_init(tcon, server, 2886 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2887 if (rc) 2888 goto qic_exit; 2889 smb2_set_related(&rqst[2]); 2890 2891 if (retries) { 2892 if (!cfid) { 2893 smb2_set_replay(server, &rqst[0]); 2894 smb2_set_replay(server, &rqst[2]); 2895 } 2896 smb2_set_replay(server, &rqst[1]); 2897 } 2898 2899 if (cfid) { 2900 rc = compound_send_recv(xid, ses, server, 2901 flags, 1, &rqst[1], 2902 &resp_buftype[1], &rsp_iov[1]); 2903 } else { 2904 rc = compound_send_recv(xid, ses, server, 2905 flags, 3, rqst, 2906 resp_buftype, rsp_iov); 2907 } 2908 if (rc) { 2909 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2910 if (rc == -EREMCHG) { 2911 tcon->need_reconnect = true; 2912 pr_warn_once("server share %s deleted\n", 2913 tcon->tree_name); 2914 } 2915 goto qic_exit; 2916 } 2917 *rsp = rsp_iov[1]; 2918 *buftype = resp_buftype[1]; 2919 2920 qic_exit: 2921 SMB2_open_free(&rqst[0]); 2922 SMB2_query_info_free(&rqst[1]); 2923 SMB2_close_free(&rqst[2]); 2924 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2925 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2926 if (cfid) 2927 close_cached_dir(cfid); 2928 kfree(vars); 2929 out_free_path: 2930 kfree(utf16_path); 2931 2932 if (is_replayable_error(rc) && 2933 smb2_should_replay(tcon, &retries, &cur_sleep)) 2934 goto replay_again; 2935 2936 return rc; 2937 } 2938 2939 static int 2940 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2941 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2942 { 2943 struct smb2_query_info_rsp *rsp; 2944 struct smb2_fs_full_size_info *info = NULL; 2945 struct kvec rsp_iov = {NULL, 0}; 2946 int buftype = CIFS_NO_BUFFER; 2947 int rc; 2948 2949 2950 rc = smb2_query_info_compound(xid, tcon, path, 2951 FILE_READ_ATTRIBUTES, 2952 FS_FULL_SIZE_INFORMATION, 2953 SMB2_O_INFO_FILESYSTEM, 2954 sizeof(struct smb2_fs_full_size_info), 2955 &rsp_iov, &buftype, cifs_sb); 2956 if (rc) 2957 goto qfs_exit; 2958 2959 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2960 buf->f_type = SMB2_SUPER_MAGIC; 2961 info = (struct smb2_fs_full_size_info *)( 2962 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2963 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2964 le32_to_cpu(rsp->OutputBufferLength), 2965 &rsp_iov, 2966 sizeof(struct smb2_fs_full_size_info)); 2967 if (!rc) 2968 smb2_copy_fs_info_to_kstatfs(info, buf); 2969 2970 qfs_exit: 2971 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2972 free_rsp_buf(buftype, rsp_iov.iov_base); 2973 return rc; 2974 } 2975 2976 static int 2977 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2978 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2979 { 2980 int rc; 2981 __le16 *utf16_path = NULL; 2982 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2983 struct cifs_open_parms oparms; 2984 struct cifs_fid fid; 2985 2986 if (!tcon->posix_extensions) 2987 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2988 2989 oparms = (struct cifs_open_parms) { 2990 .tcon = tcon, 2991 .path = path, 2992 .desired_access = FILE_READ_ATTRIBUTES, 2993 .disposition = FILE_OPEN, 2994 .create_options = cifs_create_options(cifs_sb, 0), 2995 .fid = &fid, 2996 }; 2997 2998 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2999 if (utf16_path == NULL) 3000 return -ENOMEM; 3001 3002 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3003 NULL, NULL); 3004 kfree(utf16_path); 3005 if (rc) 3006 return rc; 3007 3008 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 3009 fid.volatile_fid, buf); 3010 buf->f_type = SMB2_SUPER_MAGIC; 3011 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3012 return rc; 3013 } 3014 3015 static bool 3016 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 3017 { 3018 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 3019 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 3020 } 3021 3022 static int 3023 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 3024 __u64 length, __u32 type, int lock, int unlock, bool wait) 3025 { 3026 if (unlock && !lock) 3027 type = SMB2_LOCKFLAG_UNLOCK; 3028 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 3029 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 3030 current->tgid, length, offset, type, wait); 3031 } 3032 3033 static void 3034 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 3035 { 3036 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 3037 } 3038 3039 static void 3040 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 3041 { 3042 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 3043 } 3044 3045 static void 3046 smb2_new_lease_key(struct cifs_fid *fid) 3047 { 3048 generate_random_uuid(fid->lease_key); 3049 } 3050 3051 static int 3052 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 3053 const char *search_name, 3054 struct dfs_info3_param **target_nodes, 3055 unsigned int *num_of_nodes, 3056 const struct nls_table *nls_codepage, int remap) 3057 { 3058 int rc; 3059 __le16 *utf16_path = NULL; 3060 int utf16_path_len = 0; 3061 struct cifs_tcon *tcon; 3062 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 3063 struct get_dfs_referral_rsp *dfs_rsp = NULL; 3064 u32 dfs_req_size = 0, dfs_rsp_size = 0; 3065 int retry_once = 0; 3066 3067 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 3068 3069 /* 3070 * Try to use the IPC tcon, otherwise just use any 3071 */ 3072 tcon = ses->tcon_ipc; 3073 if (tcon == NULL) { 3074 spin_lock(&cifs_tcp_ses_lock); 3075 tcon = list_first_entry_or_null(&ses->tcon_list, 3076 struct cifs_tcon, 3077 tcon_list); 3078 if (tcon) { 3079 tcon->tc_count++; 3080 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3081 netfs_trace_tcon_ref_get_dfs_refer); 3082 } 3083 spin_unlock(&cifs_tcp_ses_lock); 3084 } 3085 3086 if (tcon == NULL) { 3087 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 3088 ses); 3089 rc = -ENOTCONN; 3090 goto out; 3091 } 3092 3093 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 3094 &utf16_path_len, 3095 nls_codepage, remap); 3096 if (!utf16_path) { 3097 rc = -ENOMEM; 3098 goto out; 3099 } 3100 3101 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 3102 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 3103 if (!dfs_req) { 3104 rc = -ENOMEM; 3105 goto out; 3106 } 3107 3108 /* Highest DFS referral version understood */ 3109 dfs_req->MaxReferralLevel = DFS_VERSION; 3110 3111 /* Path to resolve in an UTF-16 null-terminated string */ 3112 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 3113 3114 for (;;) { 3115 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 3116 FSCTL_DFS_GET_REFERRALS, 3117 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 3118 (char **)&dfs_rsp, &dfs_rsp_size); 3119 if (fatal_signal_pending(current)) { 3120 rc = -EINTR; 3121 break; 3122 } 3123 if (!is_retryable_error(rc) || retry_once++) 3124 break; 3125 usleep_range(512, 2048); 3126 } 3127 3128 if (!rc && !dfs_rsp) 3129 rc = -EIO; 3130 if (rc) { 3131 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 3132 cifs_tcon_dbg(FYI, "%s: ioctl error: rc=%d\n", __func__, rc); 3133 goto out; 3134 } 3135 3136 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 3137 num_of_nodes, target_nodes, 3138 nls_codepage, remap, search_name, 3139 true /* is_unicode */); 3140 if (rc && rc != -ENOENT) { 3141 cifs_tcon_dbg(VFS, "%s: failed to parse DFS referral %s: %d\n", 3142 __func__, search_name, rc); 3143 } 3144 3145 out: 3146 if (tcon && !tcon->ipc) { 3147 /* ipc tcons are not refcounted */ 3148 spin_lock(&cifs_tcp_ses_lock); 3149 tcon->tc_count--; 3150 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 3151 netfs_trace_tcon_ref_dec_dfs_refer); 3152 /* tc_count can never go negative */ 3153 WARN_ON(tcon->tc_count < 0); 3154 spin_unlock(&cifs_tcp_ses_lock); 3155 } 3156 kfree(utf16_path); 3157 kfree(dfs_req); 3158 kfree(dfs_rsp); 3159 return rc; 3160 } 3161 3162 static struct smb_ntsd * 3163 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3164 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3165 { 3166 struct smb_ntsd *pntsd = NULL; 3167 unsigned int xid; 3168 int rc = -EOPNOTSUPP; 3169 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3170 3171 if (IS_ERR(tlink)) 3172 return ERR_CAST(tlink); 3173 3174 xid = get_xid(); 3175 cifs_dbg(FYI, "trying to get acl\n"); 3176 3177 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3178 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3179 info); 3180 free_xid(xid); 3181 3182 cifs_put_tlink(tlink); 3183 3184 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3185 if (rc) 3186 return ERR_PTR(rc); 3187 return pntsd; 3188 3189 } 3190 3191 static struct smb_ntsd * 3192 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3193 const char *path, u32 *pacllen, u32 info) 3194 { 3195 struct smb_ntsd *pntsd = NULL; 3196 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3197 unsigned int xid; 3198 int rc; 3199 struct cifs_tcon *tcon; 3200 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3201 struct cifs_fid fid; 3202 struct cifs_open_parms oparms; 3203 __le16 *utf16_path; 3204 3205 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3206 if (IS_ERR(tlink)) 3207 return ERR_CAST(tlink); 3208 3209 tcon = tlink_tcon(tlink); 3210 xid = get_xid(); 3211 3212 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3213 if (!utf16_path) { 3214 rc = -ENOMEM; 3215 goto put_tlink; 3216 } 3217 3218 oparms = (struct cifs_open_parms) { 3219 .tcon = tcon, 3220 .path = path, 3221 .desired_access = READ_CONTROL, 3222 .disposition = FILE_OPEN, 3223 /* 3224 * When querying an ACL, even if the file is a symlink 3225 * we want to open the source not the target, and so 3226 * the protocol requires that the client specify this 3227 * flag when opening a reparse point 3228 */ 3229 .create_options = cifs_create_options(cifs_sb, 0) | 3230 OPEN_REPARSE_POINT, 3231 .fid = &fid, 3232 }; 3233 3234 if (info & SACL_SECINFO) 3235 oparms.desired_access |= SYSTEM_SECURITY; 3236 3237 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3238 NULL); 3239 kfree(utf16_path); 3240 if (!rc) { 3241 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3242 fid.volatile_fid, (void **)&pntsd, pacllen, 3243 info); 3244 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3245 } 3246 3247 put_tlink: 3248 cifs_put_tlink(tlink); 3249 free_xid(xid); 3250 3251 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3252 if (rc) 3253 return ERR_PTR(rc); 3254 return pntsd; 3255 } 3256 3257 static int 3258 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, 3259 struct inode *inode, const char *path, int aclflag) 3260 { 3261 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3262 unsigned int xid; 3263 int rc, access_flags = 0; 3264 struct cifs_tcon *tcon; 3265 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3266 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3267 struct cifs_fid fid; 3268 struct cifs_open_parms oparms; 3269 __le16 *utf16_path; 3270 3271 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3272 if (IS_ERR(tlink)) 3273 return PTR_ERR(tlink); 3274 3275 tcon = tlink_tcon(tlink); 3276 xid = get_xid(); 3277 3278 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3279 access_flags |= WRITE_OWNER; 3280 if (aclflag & CIFS_ACL_SACL) 3281 access_flags |= SYSTEM_SECURITY; 3282 if (aclflag & CIFS_ACL_DACL) 3283 access_flags |= WRITE_DAC; 3284 3285 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3286 if (!utf16_path) { 3287 rc = -ENOMEM; 3288 goto put_tlink; 3289 } 3290 3291 oparms = (struct cifs_open_parms) { 3292 .tcon = tcon, 3293 .desired_access = access_flags, 3294 .create_options = cifs_create_options(cifs_sb, 0), 3295 .disposition = FILE_OPEN, 3296 .path = path, 3297 .fid = &fid, 3298 }; 3299 3300 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3301 NULL, NULL); 3302 kfree(utf16_path); 3303 if (!rc) { 3304 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3305 fid.volatile_fid, pnntsd, acllen, aclflag); 3306 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3307 } 3308 3309 put_tlink: 3310 cifs_put_tlink(tlink); 3311 free_xid(xid); 3312 return rc; 3313 } 3314 3315 /* Retrieve an ACL from the server */ 3316 static struct smb_ntsd * 3317 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3318 struct inode *inode, const char *path, 3319 u32 *pacllen, u32 info) 3320 { 3321 struct smb_ntsd *pntsd = NULL; 3322 struct cifsFileInfo *open_file = NULL; 3323 3324 if (inode && !(info & SACL_SECINFO)) 3325 open_file = find_readable_file(CIFS_I(inode), true); 3326 if (!open_file || (info & SACL_SECINFO)) 3327 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3328 3329 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3330 cifsFileInfo_put(open_file); 3331 return pntsd; 3332 } 3333 3334 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3335 loff_t offset, loff_t len, unsigned int xid) 3336 { 3337 struct cifsFileInfo *cfile = file->private_data; 3338 struct file_zero_data_information fsctl_buf; 3339 3340 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3341 3342 fsctl_buf.FileOffset = cpu_to_le64(offset); 3343 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3344 3345 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3346 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3347 (char *)&fsctl_buf, 3348 sizeof(struct file_zero_data_information), 3349 0, NULL, NULL); 3350 } 3351 3352 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3353 unsigned long long offset, unsigned long long len, 3354 bool keep_size) 3355 { 3356 struct cifs_ses *ses = tcon->ses; 3357 struct inode *inode = file_inode(file); 3358 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3359 struct cifsFileInfo *cfile = file->private_data; 3360 struct netfs_inode *ictx = netfs_inode(inode); 3361 unsigned long long i_size, new_size, remote_size; 3362 long rc; 3363 unsigned int xid; 3364 3365 xid = get_xid(); 3366 3367 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3368 ses->Suid, offset, len); 3369 3370 filemap_invalidate_lock(inode->i_mapping); 3371 3372 i_size = i_size_read(inode); 3373 remote_size = ictx->remote_i_size; 3374 if (offset + len >= remote_size && offset < i_size) { 3375 unsigned long long top = umin(offset + len, i_size); 3376 3377 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3378 if (rc < 0) 3379 goto zero_range_exit; 3380 } 3381 3382 /* 3383 * We zero the range through ioctl, so we need remove the page caches 3384 * first, otherwise the data may be inconsistent with the server. 3385 */ 3386 truncate_pagecache_range(inode, offset, offset + len - 1); 3387 netfs_wait_for_outstanding_io(inode); 3388 3389 /* if file not oplocked can't be sure whether asking to extend size */ 3390 rc = -EOPNOTSUPP; 3391 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3392 goto zero_range_exit; 3393 3394 rc = smb3_zero_data(file, tcon, offset, len, xid); 3395 if (rc < 0) 3396 goto zero_range_exit; 3397 3398 /* 3399 * do we also need to change the size of the file? 3400 */ 3401 new_size = offset + len; 3402 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3403 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3404 cfile->fid.volatile_fid, cfile->pid, new_size); 3405 if (rc >= 0) { 3406 truncate_setsize(inode, new_size); 3407 netfs_resize_file(&cifsi->netfs, new_size, true); 3408 if (offset < cifsi->netfs.zero_point) 3409 cifsi->netfs.zero_point = offset; 3410 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3411 } 3412 } 3413 3414 zero_range_exit: 3415 filemap_invalidate_unlock(inode->i_mapping); 3416 free_xid(xid); 3417 if (rc) 3418 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3419 ses->Suid, offset, len, rc); 3420 else 3421 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3422 ses->Suid, offset, len); 3423 return rc; 3424 } 3425 3426 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3427 loff_t offset, loff_t len) 3428 { 3429 struct inode *inode = file_inode(file); 3430 struct cifsFileInfo *cfile = file->private_data; 3431 struct file_zero_data_information fsctl_buf; 3432 unsigned long long end = offset + len, i_size, remote_i_size; 3433 long rc; 3434 unsigned int xid; 3435 __u8 set_sparse = 1; 3436 3437 xid = get_xid(); 3438 3439 /* Need to make file sparse, if not already, before freeing range. */ 3440 /* Consider adding equivalent for compressed since it could also work */ 3441 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3442 rc = -EOPNOTSUPP; 3443 goto out; 3444 } 3445 3446 filemap_invalidate_lock(inode->i_mapping); 3447 /* 3448 * We implement the punch hole through ioctl, so we need remove the page 3449 * caches first, otherwise the data may be inconsistent with the server. 3450 */ 3451 truncate_pagecache_range(inode, offset, offset + len - 1); 3452 netfs_wait_for_outstanding_io(inode); 3453 3454 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3455 3456 fsctl_buf.FileOffset = cpu_to_le64(offset); 3457 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3458 3459 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3460 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3461 (char *)&fsctl_buf, 3462 sizeof(struct file_zero_data_information), 3463 CIFSMaxBufSize, NULL, NULL); 3464 3465 if (rc) 3466 goto unlock; 3467 3468 /* If there's dirty data in the buffer that would extend the EOF if it 3469 * were written, then we need to move the EOF marker over to the lower 3470 * of the high end of the hole and the proposed EOF. The problem is 3471 * that we locally hole-punch the tail of the dirty data, the proposed 3472 * EOF update will end up in the wrong place. 3473 */ 3474 i_size = i_size_read(inode); 3475 remote_i_size = netfs_inode(inode)->remote_i_size; 3476 if (end > remote_i_size && i_size > remote_i_size) { 3477 unsigned long long extend_to = umin(end, i_size); 3478 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3479 cfile->fid.volatile_fid, cfile->pid, extend_to); 3480 if (rc >= 0) 3481 netfs_inode(inode)->remote_i_size = extend_to; 3482 } 3483 3484 unlock: 3485 filemap_invalidate_unlock(inode->i_mapping); 3486 out: 3487 free_xid(xid); 3488 return rc; 3489 } 3490 3491 static int smb3_simple_fallocate_write_range(unsigned int xid, 3492 struct cifs_tcon *tcon, 3493 struct cifsFileInfo *cfile, 3494 loff_t off, loff_t len, 3495 char *buf) 3496 { 3497 struct cifs_io_parms io_parms = {0}; 3498 int nbytes; 3499 int rc = 0; 3500 struct kvec iov[2]; 3501 3502 io_parms.netfid = cfile->fid.netfid; 3503 io_parms.pid = current->tgid; 3504 io_parms.tcon = tcon; 3505 io_parms.persistent_fid = cfile->fid.persistent_fid; 3506 io_parms.volatile_fid = cfile->fid.volatile_fid; 3507 3508 while (len) { 3509 io_parms.offset = off; 3510 io_parms.length = len; 3511 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3512 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3513 /* iov[0] is reserved for smb header */ 3514 iov[1].iov_base = buf; 3515 iov[1].iov_len = io_parms.length; 3516 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3517 if (rc) 3518 break; 3519 if (nbytes > len) 3520 return -EINVAL; 3521 buf += nbytes; 3522 off += nbytes; 3523 len -= nbytes; 3524 } 3525 return rc; 3526 } 3527 3528 static int smb3_simple_fallocate_range(unsigned int xid, 3529 struct cifs_tcon *tcon, 3530 struct cifsFileInfo *cfile, 3531 loff_t off, loff_t len) 3532 { 3533 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3534 u32 out_data_len; 3535 char *buf = NULL; 3536 loff_t l; 3537 int rc; 3538 3539 in_data.file_offset = cpu_to_le64(off); 3540 in_data.length = cpu_to_le64(len); 3541 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3542 cfile->fid.volatile_fid, 3543 FSCTL_QUERY_ALLOCATED_RANGES, 3544 (char *)&in_data, sizeof(in_data), 3545 1024 * sizeof(struct file_allocated_range_buffer), 3546 (char **)&out_data, &out_data_len); 3547 if (rc) 3548 goto out; 3549 3550 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3551 if (buf == NULL) { 3552 rc = -ENOMEM; 3553 goto out; 3554 } 3555 3556 tmp_data = out_data; 3557 while (len) { 3558 /* 3559 * The rest of the region is unmapped so write it all. 3560 */ 3561 if (out_data_len == 0) { 3562 rc = smb3_simple_fallocate_write_range(xid, tcon, 3563 cfile, off, len, buf); 3564 goto out; 3565 } 3566 3567 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3568 rc = -EINVAL; 3569 goto out; 3570 } 3571 3572 if (off < le64_to_cpu(tmp_data->file_offset)) { 3573 /* 3574 * We are at a hole. Write until the end of the region 3575 * or until the next allocated data, 3576 * whichever comes next. 3577 */ 3578 l = le64_to_cpu(tmp_data->file_offset) - off; 3579 if (len < l) 3580 l = len; 3581 rc = smb3_simple_fallocate_write_range(xid, tcon, 3582 cfile, off, l, buf); 3583 if (rc) 3584 goto out; 3585 off = off + l; 3586 len = len - l; 3587 if (len == 0) 3588 goto out; 3589 } 3590 /* 3591 * We are at a section of allocated data, just skip forward 3592 * until the end of the data or the end of the region 3593 * we are supposed to fallocate, whichever comes first. 3594 */ 3595 l = le64_to_cpu(tmp_data->length); 3596 if (len < l) 3597 l = len; 3598 off += l; 3599 len -= l; 3600 3601 tmp_data = &tmp_data[1]; 3602 out_data_len -= sizeof(struct file_allocated_range_buffer); 3603 } 3604 3605 out: 3606 kfree(out_data); 3607 kfree(buf); 3608 return rc; 3609 } 3610 3611 3612 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3613 loff_t off, loff_t len, bool keep_size) 3614 { 3615 struct inode *inode; 3616 struct cifsInodeInfo *cifsi; 3617 struct cifsFileInfo *cfile = file->private_data; 3618 long rc = -EOPNOTSUPP; 3619 unsigned int xid; 3620 loff_t new_eof; 3621 3622 xid = get_xid(); 3623 3624 inode = d_inode(cfile->dentry); 3625 cifsi = CIFS_I(inode); 3626 3627 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3628 tcon->ses->Suid, off, len); 3629 /* if file not oplocked can't be sure whether asking to extend size */ 3630 if (!CIFS_CACHE_READ(cifsi)) 3631 if (keep_size == false) { 3632 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3633 tcon->tid, tcon->ses->Suid, off, len, rc); 3634 free_xid(xid); 3635 return rc; 3636 } 3637 3638 /* 3639 * Extending the file 3640 */ 3641 if ((keep_size == false) && i_size_read(inode) < off + len) { 3642 rc = inode_newsize_ok(inode, off + len); 3643 if (rc) 3644 goto out; 3645 3646 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3647 smb2_set_sparse(xid, tcon, cfile, inode, false); 3648 3649 new_eof = off + len; 3650 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3651 cfile->fid.volatile_fid, cfile->pid, new_eof); 3652 if (rc == 0) { 3653 netfs_resize_file(&cifsi->netfs, new_eof, true); 3654 cifs_setsize(inode, new_eof); 3655 } 3656 goto out; 3657 } 3658 3659 /* 3660 * Files are non-sparse by default so falloc may be a no-op 3661 * Must check if file sparse. If not sparse, and since we are not 3662 * extending then no need to do anything since file already allocated 3663 */ 3664 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3665 rc = 0; 3666 goto out; 3667 } 3668 3669 if (keep_size == true) { 3670 /* 3671 * We can not preallocate pages beyond the end of the file 3672 * in SMB2 3673 */ 3674 if (off >= i_size_read(inode)) { 3675 rc = 0; 3676 goto out; 3677 } 3678 /* 3679 * For fallocates that are partially beyond the end of file, 3680 * clamp len so we only fallocate up to the end of file. 3681 */ 3682 if (off + len > i_size_read(inode)) { 3683 len = i_size_read(inode) - off; 3684 } 3685 } 3686 3687 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3688 /* 3689 * At this point, we are trying to fallocate an internal 3690 * regions of a sparse file. Since smb2 does not have a 3691 * fallocate command we have two options on how to emulate this. 3692 * We can either turn the entire file to become non-sparse 3693 * which we only do if the fallocate is for virtually 3694 * the whole file, or we can overwrite the region with zeroes 3695 * using SMB2_write, which could be prohibitevly expensive 3696 * if len is large. 3697 */ 3698 /* 3699 * We are only trying to fallocate a small region so 3700 * just write it with zero. 3701 */ 3702 if (len <= 1024 * 1024) { 3703 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3704 off, len); 3705 goto out; 3706 } 3707 3708 /* 3709 * Check if falloc starts within first few pages of file 3710 * and ends within a few pages of the end of file to 3711 * ensure that most of file is being forced to be 3712 * fallocated now. If so then setting whole file sparse 3713 * ie potentially making a few extra pages at the beginning 3714 * or end of the file non-sparse via set_sparse is harmless. 3715 */ 3716 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3717 rc = -EOPNOTSUPP; 3718 goto out; 3719 } 3720 } 3721 3722 smb2_set_sparse(xid, tcon, cfile, inode, false); 3723 rc = 0; 3724 3725 out: 3726 if (rc) 3727 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3728 tcon->ses->Suid, off, len, rc); 3729 else 3730 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3731 tcon->ses->Suid, off, len); 3732 3733 free_xid(xid); 3734 return rc; 3735 } 3736 3737 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3738 loff_t off, loff_t len) 3739 { 3740 int rc; 3741 unsigned int xid; 3742 struct inode *inode = file_inode(file); 3743 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3744 struct cifsFileInfo *cfile = file->private_data; 3745 struct netfs_inode *ictx = &cifsi->netfs; 3746 loff_t old_eof, new_eof; 3747 3748 xid = get_xid(); 3749 3750 old_eof = i_size_read(inode); 3751 if ((off >= old_eof) || 3752 off + len >= old_eof) { 3753 rc = -EINVAL; 3754 goto out; 3755 } 3756 3757 filemap_invalidate_lock(inode->i_mapping); 3758 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3759 if (rc < 0) 3760 goto out_2; 3761 3762 truncate_pagecache_range(inode, off, old_eof); 3763 ictx->zero_point = old_eof; 3764 netfs_wait_for_outstanding_io(inode); 3765 3766 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3767 old_eof - off - len, off); 3768 if (rc < 0) 3769 goto out_2; 3770 3771 new_eof = old_eof - len; 3772 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3773 cfile->fid.volatile_fid, cfile->pid, new_eof); 3774 if (rc < 0) 3775 goto out_2; 3776 3777 rc = 0; 3778 3779 truncate_setsize(inode, new_eof); 3780 netfs_resize_file(&cifsi->netfs, new_eof, true); 3781 ictx->zero_point = new_eof; 3782 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3783 out_2: 3784 filemap_invalidate_unlock(inode->i_mapping); 3785 out: 3786 free_xid(xid); 3787 return rc; 3788 } 3789 3790 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3791 loff_t off, loff_t len) 3792 { 3793 int rc; 3794 unsigned int xid; 3795 struct cifsFileInfo *cfile = file->private_data; 3796 struct inode *inode = file_inode(file); 3797 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3798 __u64 count, old_eof, new_eof; 3799 3800 xid = get_xid(); 3801 3802 old_eof = i_size_read(inode); 3803 if (off >= old_eof) { 3804 rc = -EINVAL; 3805 goto out; 3806 } 3807 3808 count = old_eof - off; 3809 new_eof = old_eof + len; 3810 3811 filemap_invalidate_lock(inode->i_mapping); 3812 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3813 if (rc < 0) 3814 goto out_2; 3815 truncate_pagecache_range(inode, off, old_eof); 3816 netfs_wait_for_outstanding_io(inode); 3817 3818 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3819 cfile->fid.volatile_fid, cfile->pid, new_eof); 3820 if (rc < 0) 3821 goto out_2; 3822 3823 truncate_setsize(inode, new_eof); 3824 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3825 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3826 3827 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3828 if (rc < 0) 3829 goto out_2; 3830 cifsi->netfs.zero_point = new_eof; 3831 3832 rc = smb3_zero_data(file, tcon, off, len, xid); 3833 if (rc < 0) 3834 goto out_2; 3835 3836 rc = 0; 3837 out_2: 3838 filemap_invalidate_unlock(inode->i_mapping); 3839 out: 3840 free_xid(xid); 3841 return rc; 3842 } 3843 3844 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3845 { 3846 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3847 struct cifsInodeInfo *cifsi; 3848 struct inode *inode; 3849 int rc = 0; 3850 struct file_allocated_range_buffer in_data, *out_data = NULL; 3851 u32 out_data_len; 3852 unsigned int xid; 3853 3854 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3855 return generic_file_llseek(file, offset, whence); 3856 3857 inode = d_inode(cfile->dentry); 3858 cifsi = CIFS_I(inode); 3859 3860 if (offset < 0 || offset >= i_size_read(inode)) 3861 return -ENXIO; 3862 3863 xid = get_xid(); 3864 /* 3865 * We need to be sure that all dirty pages are written as they 3866 * might fill holes on the server. 3867 * Note that we also MUST flush any written pages since at least 3868 * some servers (Windows2016) will not reflect recent writes in 3869 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3870 */ 3871 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3872 if (wrcfile) { 3873 filemap_write_and_wait(inode->i_mapping); 3874 smb2_flush_file(xid, tcon, &wrcfile->fid); 3875 cifsFileInfo_put(wrcfile); 3876 } 3877 3878 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3879 if (whence == SEEK_HOLE) 3880 offset = i_size_read(inode); 3881 goto lseek_exit; 3882 } 3883 3884 in_data.file_offset = cpu_to_le64(offset); 3885 in_data.length = cpu_to_le64(i_size_read(inode)); 3886 3887 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3888 cfile->fid.volatile_fid, 3889 FSCTL_QUERY_ALLOCATED_RANGES, 3890 (char *)&in_data, sizeof(in_data), 3891 sizeof(struct file_allocated_range_buffer), 3892 (char **)&out_data, &out_data_len); 3893 if (rc == -E2BIG) 3894 rc = 0; 3895 if (rc) 3896 goto lseek_exit; 3897 3898 if (whence == SEEK_HOLE && out_data_len == 0) 3899 goto lseek_exit; 3900 3901 if (whence == SEEK_DATA && out_data_len == 0) { 3902 rc = -ENXIO; 3903 goto lseek_exit; 3904 } 3905 3906 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3907 rc = -EINVAL; 3908 goto lseek_exit; 3909 } 3910 if (whence == SEEK_DATA) { 3911 offset = le64_to_cpu(out_data->file_offset); 3912 goto lseek_exit; 3913 } 3914 if (offset < le64_to_cpu(out_data->file_offset)) 3915 goto lseek_exit; 3916 3917 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3918 3919 lseek_exit: 3920 free_xid(xid); 3921 kfree(out_data); 3922 if (!rc) 3923 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3924 else 3925 return rc; 3926 } 3927 3928 static int smb3_fiemap(struct cifs_tcon *tcon, 3929 struct cifsFileInfo *cfile, 3930 struct fiemap_extent_info *fei, u64 start, u64 len) 3931 { 3932 unsigned int xid; 3933 struct file_allocated_range_buffer in_data, *out_data; 3934 u32 out_data_len; 3935 int i, num, rc, flags, last_blob; 3936 u64 next; 3937 3938 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3939 if (rc) 3940 return rc; 3941 3942 xid = get_xid(); 3943 again: 3944 in_data.file_offset = cpu_to_le64(start); 3945 in_data.length = cpu_to_le64(len); 3946 3947 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3948 cfile->fid.volatile_fid, 3949 FSCTL_QUERY_ALLOCATED_RANGES, 3950 (char *)&in_data, sizeof(in_data), 3951 1024 * sizeof(struct file_allocated_range_buffer), 3952 (char **)&out_data, &out_data_len); 3953 if (rc == -E2BIG) { 3954 last_blob = 0; 3955 rc = 0; 3956 } else 3957 last_blob = 1; 3958 if (rc) 3959 goto out; 3960 3961 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3962 rc = -EINVAL; 3963 goto out; 3964 } 3965 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3966 rc = -EINVAL; 3967 goto out; 3968 } 3969 3970 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3971 for (i = 0; i < num; i++) { 3972 flags = 0; 3973 if (i == num - 1 && last_blob) 3974 flags |= FIEMAP_EXTENT_LAST; 3975 3976 rc = fiemap_fill_next_extent(fei, 3977 le64_to_cpu(out_data[i].file_offset), 3978 le64_to_cpu(out_data[i].file_offset), 3979 le64_to_cpu(out_data[i].length), 3980 flags); 3981 if (rc < 0) 3982 goto out; 3983 if (rc == 1) { 3984 rc = 0; 3985 goto out; 3986 } 3987 } 3988 3989 if (!last_blob) { 3990 next = le64_to_cpu(out_data[num - 1].file_offset) + 3991 le64_to_cpu(out_data[num - 1].length); 3992 len = len - (next - start); 3993 start = next; 3994 goto again; 3995 } 3996 3997 out: 3998 free_xid(xid); 3999 kfree(out_data); 4000 return rc; 4001 } 4002 4003 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 4004 loff_t off, loff_t len) 4005 { 4006 /* KEEP_SIZE already checked for by do_fallocate */ 4007 if (mode & FALLOC_FL_PUNCH_HOLE) 4008 return smb3_punch_hole(file, tcon, off, len); 4009 else if (mode & FALLOC_FL_ZERO_RANGE) { 4010 if (mode & FALLOC_FL_KEEP_SIZE) 4011 return smb3_zero_range(file, tcon, off, len, true); 4012 return smb3_zero_range(file, tcon, off, len, false); 4013 } else if (mode == FALLOC_FL_KEEP_SIZE) 4014 return smb3_simple_falloc(file, tcon, off, len, true); 4015 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 4016 return smb3_collapse_range(file, tcon, off, len); 4017 else if (mode == FALLOC_FL_INSERT_RANGE) 4018 return smb3_insert_range(file, tcon, off, len); 4019 else if (mode == 0) 4020 return smb3_simple_falloc(file, tcon, off, len, false); 4021 4022 return -EOPNOTSUPP; 4023 } 4024 4025 static void 4026 smb2_downgrade_oplock(struct TCP_Server_Info *server, 4027 struct cifsInodeInfo *cinode, __u32 oplock, 4028 __u16 epoch, bool *purge_cache) 4029 { 4030 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 4031 } 4032 4033 static void 4034 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4035 __u16 epoch, bool *purge_cache); 4036 4037 static void 4038 smb3_downgrade_oplock(struct TCP_Server_Info *server, 4039 struct cifsInodeInfo *cinode, __u32 oplock, 4040 __u16 epoch, bool *purge_cache) 4041 { 4042 unsigned int old_state = cinode->oplock; 4043 __u16 old_epoch = cinode->epoch; 4044 unsigned int new_state; 4045 4046 if (epoch > old_epoch) { 4047 smb21_set_oplock_level(cinode, oplock, 0, NULL); 4048 cinode->epoch = epoch; 4049 } 4050 4051 new_state = cinode->oplock; 4052 *purge_cache = false; 4053 4054 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 4055 (new_state & CIFS_CACHE_READ_FLG) == 0) 4056 *purge_cache = true; 4057 else if (old_state == new_state && (epoch - old_epoch > 1)) 4058 *purge_cache = true; 4059 } 4060 4061 static void 4062 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4063 __u16 epoch, bool *purge_cache) 4064 { 4065 oplock &= 0xFF; 4066 cinode->lease_granted = false; 4067 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4068 return; 4069 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 4070 cinode->oplock = CIFS_CACHE_RHW_FLG; 4071 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 4072 &cinode->netfs.inode); 4073 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 4074 cinode->oplock = CIFS_CACHE_RW_FLG; 4075 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 4076 &cinode->netfs.inode); 4077 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 4078 cinode->oplock = CIFS_CACHE_READ_FLG; 4079 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 4080 &cinode->netfs.inode); 4081 } else 4082 cinode->oplock = 0; 4083 } 4084 4085 static void 4086 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4087 __u16 epoch, bool *purge_cache) 4088 { 4089 char message[5] = {0}; 4090 unsigned int new_oplock = 0; 4091 4092 oplock &= 0xFF; 4093 cinode->lease_granted = true; 4094 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4095 return; 4096 4097 /* Check if the server granted an oplock rather than a lease */ 4098 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4099 return smb2_set_oplock_level(cinode, oplock, epoch, 4100 purge_cache); 4101 4102 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4103 new_oplock |= CIFS_CACHE_READ_FLG; 4104 strcat(message, "R"); 4105 } 4106 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4107 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4108 strcat(message, "H"); 4109 } 4110 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4111 new_oplock |= CIFS_CACHE_WRITE_FLG; 4112 strcat(message, "W"); 4113 } 4114 if (!new_oplock) 4115 strscpy(message, "None"); 4116 4117 cinode->oplock = new_oplock; 4118 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4119 &cinode->netfs.inode); 4120 } 4121 4122 static void 4123 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4124 __u16 epoch, bool *purge_cache) 4125 { 4126 unsigned int old_oplock = cinode->oplock; 4127 4128 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4129 4130 if (purge_cache) { 4131 *purge_cache = false; 4132 if (old_oplock == CIFS_CACHE_READ_FLG) { 4133 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4134 (epoch - cinode->epoch > 0)) 4135 *purge_cache = true; 4136 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4137 (epoch - cinode->epoch > 1)) 4138 *purge_cache = true; 4139 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4140 (epoch - cinode->epoch > 1)) 4141 *purge_cache = true; 4142 else if (cinode->oplock == 0 && 4143 (epoch - cinode->epoch > 0)) 4144 *purge_cache = true; 4145 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4146 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4147 (epoch - cinode->epoch > 0)) 4148 *purge_cache = true; 4149 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4150 (epoch - cinode->epoch > 1)) 4151 *purge_cache = true; 4152 } 4153 cinode->epoch = epoch; 4154 } 4155 } 4156 4157 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4158 static bool 4159 smb2_is_read_op(__u32 oplock) 4160 { 4161 return oplock == SMB2_OPLOCK_LEVEL_II; 4162 } 4163 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4164 4165 static bool 4166 smb21_is_read_op(__u32 oplock) 4167 { 4168 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4169 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4170 } 4171 4172 static __le32 4173 map_oplock_to_lease(u8 oplock) 4174 { 4175 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4176 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4177 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4178 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4179 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4180 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4181 SMB2_LEASE_WRITE_CACHING_LE; 4182 return 0; 4183 } 4184 4185 static char * 4186 smb2_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4187 { 4188 struct create_lease *buf; 4189 4190 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4191 if (!buf) 4192 return NULL; 4193 4194 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4195 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4196 4197 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4198 (struct create_lease, lcontext)); 4199 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4200 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4201 (struct create_lease, Name)); 4202 buf->ccontext.NameLength = cpu_to_le16(4); 4203 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4204 buf->Name[0] = 'R'; 4205 buf->Name[1] = 'q'; 4206 buf->Name[2] = 'L'; 4207 buf->Name[3] = 's'; 4208 return (char *)buf; 4209 } 4210 4211 static char * 4212 smb3_create_lease_buf(u8 *lease_key, u8 oplock, u8 *parent_lease_key, __le32 flags) 4213 { 4214 struct create_lease_v2 *buf; 4215 4216 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4217 if (!buf) 4218 return NULL; 4219 4220 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4221 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4222 buf->lcontext.LeaseFlags = flags; 4223 if (flags & SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET_LE) 4224 memcpy(&buf->lcontext.ParentLeaseKey, parent_lease_key, SMB2_LEASE_KEY_SIZE); 4225 4226 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4227 (struct create_lease_v2, lcontext)); 4228 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4229 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4230 (struct create_lease_v2, Name)); 4231 buf->ccontext.NameLength = cpu_to_le16(4); 4232 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4233 buf->Name[0] = 'R'; 4234 buf->Name[1] = 'q'; 4235 buf->Name[2] = 'L'; 4236 buf->Name[3] = 's'; 4237 return (char *)buf; 4238 } 4239 4240 static __u8 4241 smb2_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4242 { 4243 struct create_lease *lc = (struct create_lease *)buf; 4244 4245 *epoch = 0; /* not used */ 4246 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4247 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4248 return le32_to_cpu(lc->lcontext.LeaseState); 4249 } 4250 4251 static __u8 4252 smb3_parse_lease_buf(void *buf, __u16 *epoch, char *lease_key) 4253 { 4254 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4255 4256 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4257 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4258 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4259 if (lease_key) 4260 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4261 return le32_to_cpu(lc->lcontext.LeaseState); 4262 } 4263 4264 static unsigned int 4265 smb2_wp_retry_size(struct inode *inode) 4266 { 4267 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4268 SMB2_MAX_BUFFER_SIZE); 4269 } 4270 4271 static bool 4272 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4273 { 4274 return !cfile->invalidHandle; 4275 } 4276 4277 static void 4278 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4279 struct smb_rqst *old_rq, __le16 cipher_type) 4280 { 4281 struct smb2_hdr *shdr = 4282 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4283 4284 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4285 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4286 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4287 tr_hdr->Flags = cpu_to_le16(0x01); 4288 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4289 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4290 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4291 else 4292 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4293 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4294 } 4295 4296 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4297 int num_rqst, const u8 *sig, u8 **iv, 4298 struct aead_request **req, struct sg_table *sgt, 4299 unsigned int *num_sgs) 4300 { 4301 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4302 unsigned int iv_size = crypto_aead_ivsize(tfm); 4303 unsigned int len; 4304 u8 *p; 4305 4306 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4307 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4308 return ERR_PTR(*num_sgs); 4309 4310 len = iv_size; 4311 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4312 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4313 len += req_size; 4314 len = ALIGN(len, __alignof__(struct scatterlist)); 4315 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4316 4317 p = kzalloc(len, GFP_NOFS); 4318 if (!p) 4319 return ERR_PTR(-ENOMEM); 4320 4321 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4322 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4323 crypto_tfm_ctx_alignment()); 4324 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4325 __alignof__(struct scatterlist)); 4326 return p; 4327 } 4328 4329 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4330 int num_rqst, const u8 *sig, u8 **iv, 4331 struct aead_request **req, struct scatterlist **sgl) 4332 { 4333 struct sg_table sgtable = {}; 4334 unsigned int skip, num_sgs, i, j; 4335 ssize_t rc; 4336 void *p; 4337 4338 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, &num_sgs); 4339 if (IS_ERR(p)) 4340 return ERR_CAST(p); 4341 4342 sg_init_marker(sgtable.sgl, num_sgs); 4343 4344 /* 4345 * The first rqst has a transform header where the 4346 * first 20 bytes are not part of the encrypted blob. 4347 */ 4348 skip = 20; 4349 4350 for (i = 0; i < num_rqst; i++) { 4351 struct iov_iter *iter = &rqst[i].rq_iter; 4352 size_t count = iov_iter_count(iter); 4353 4354 for (j = 0; j < rqst[i].rq_nvec; j++) { 4355 cifs_sg_set_buf(&sgtable, 4356 rqst[i].rq_iov[j].iov_base + skip, 4357 rqst[i].rq_iov[j].iov_len - skip); 4358 4359 /* See the above comment on the 'skip' assignment */ 4360 skip = 0; 4361 } 4362 sgtable.orig_nents = sgtable.nents; 4363 4364 rc = extract_iter_to_sg(iter, count, &sgtable, 4365 num_sgs - sgtable.nents, 0); 4366 iov_iter_revert(iter, rc); 4367 sgtable.orig_nents = sgtable.nents; 4368 } 4369 4370 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4371 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4372 *sgl = sgtable.sgl; 4373 return p; 4374 } 4375 4376 static int 4377 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4378 { 4379 struct TCP_Server_Info *pserver; 4380 struct cifs_ses *ses; 4381 u8 *ses_enc_key; 4382 4383 /* If server is a channel, select the primary channel */ 4384 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4385 4386 spin_lock(&cifs_tcp_ses_lock); 4387 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4388 if (ses->Suid == ses_id) { 4389 spin_lock(&ses->ses_lock); 4390 ses_enc_key = enc ? ses->smb3encryptionkey : 4391 ses->smb3decryptionkey; 4392 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4393 spin_unlock(&ses->ses_lock); 4394 spin_unlock(&cifs_tcp_ses_lock); 4395 return 0; 4396 } 4397 } 4398 spin_unlock(&cifs_tcp_ses_lock); 4399 4400 trace_smb3_ses_not_found(ses_id); 4401 4402 return -EAGAIN; 4403 } 4404 /* 4405 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4406 * iov[0] - transform header (associate data), 4407 * iov[1-N] - SMB2 header and pages - data to encrypt. 4408 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4409 * untouched. 4410 */ 4411 static int 4412 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4413 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4414 { 4415 struct smb2_transform_hdr *tr_hdr = 4416 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4417 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4418 int rc = 0; 4419 struct scatterlist *sg; 4420 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4421 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4422 struct aead_request *req; 4423 u8 *iv; 4424 DECLARE_CRYPTO_WAIT(wait); 4425 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4426 void *creq; 4427 4428 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4429 if (rc) { 4430 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4431 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4432 return rc; 4433 } 4434 4435 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4436 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4437 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4438 else 4439 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4440 4441 if (rc) { 4442 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4443 return rc; 4444 } 4445 4446 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4447 if (rc) { 4448 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4449 return rc; 4450 } 4451 4452 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg); 4453 if (IS_ERR(creq)) 4454 return PTR_ERR(creq); 4455 4456 if (!enc) { 4457 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4458 crypt_len += SMB2_SIGNATURE_SIZE; 4459 } 4460 4461 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4462 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4463 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4464 else { 4465 iv[0] = 3; 4466 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4467 } 4468 4469 aead_request_set_tfm(req, tfm); 4470 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4471 aead_request_set_ad(req, assoc_data_len); 4472 4473 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4474 crypto_req_done, &wait); 4475 4476 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4477 : crypto_aead_decrypt(req), &wait); 4478 4479 if (!rc && enc) 4480 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4481 4482 kfree_sensitive(creq); 4483 return rc; 4484 } 4485 4486 /* 4487 * Clear a read buffer, discarding the folios which have the 1st mark set. 4488 */ 4489 static void cifs_clear_folioq_buffer(struct folio_queue *buffer) 4490 { 4491 struct folio_queue *folioq; 4492 4493 while ((folioq = buffer)) { 4494 for (int s = 0; s < folioq_count(folioq); s++) 4495 if (folioq_is_marked(folioq, s)) 4496 folio_put(folioq_folio(folioq, s)); 4497 buffer = folioq->next; 4498 kfree(folioq); 4499 } 4500 } 4501 4502 /* 4503 * Allocate buffer space into a folio queue. 4504 */ 4505 static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size) 4506 { 4507 struct folio_queue *buffer = NULL, *tail = NULL, *p; 4508 struct folio *folio; 4509 unsigned int slot; 4510 4511 do { 4512 if (!tail || folioq_full(tail)) { 4513 p = kmalloc(sizeof(*p), GFP_NOFS); 4514 if (!p) 4515 goto nomem; 4516 folioq_init(p, 0); 4517 if (tail) { 4518 tail->next = p; 4519 p->prev = tail; 4520 } else { 4521 buffer = p; 4522 } 4523 tail = p; 4524 } 4525 4526 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0); 4527 if (!folio) 4528 goto nomem; 4529 4530 slot = folioq_append_mark(tail, folio); 4531 size -= folioq_folio_size(tail, slot); 4532 } while (size > 0); 4533 4534 return buffer; 4535 4536 nomem: 4537 cifs_clear_folioq_buffer(buffer); 4538 return NULL; 4539 } 4540 4541 /* 4542 * Copy data from an iterator to the folios in a folio queue buffer. 4543 */ 4544 static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size, 4545 struct folio_queue *buffer) 4546 { 4547 for (; buffer; buffer = buffer->next) { 4548 for (int s = 0; s < folioq_count(buffer); s++) { 4549 struct folio *folio = folioq_folio(buffer, s); 4550 size_t part = folioq_folio_size(buffer, s); 4551 4552 part = umin(part, size); 4553 4554 if (copy_folio_from_iter(folio, 0, part, iter) != part) 4555 return false; 4556 size -= part; 4557 } 4558 } 4559 return true; 4560 } 4561 4562 void 4563 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4564 { 4565 for (int i = 0; i < num_rqst; i++) 4566 cifs_clear_folioq_buffer(rqst[i].rq_buffer); 4567 } 4568 4569 /* 4570 * This function will initialize new_rq and encrypt the content. 4571 * The first entry, new_rq[0], only contains a single iov which contains 4572 * a smb2_transform_hdr and is pre-allocated by the caller. 4573 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4574 * 4575 * The end result is an array of smb_rqst structures where the first structure 4576 * only contains a single iov for the transform header which we then can pass 4577 * to crypt_message(). 4578 * 4579 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4580 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4581 */ 4582 static int 4583 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4584 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4585 { 4586 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4587 unsigned int orig_len = 0; 4588 int rc = -ENOMEM; 4589 4590 for (int i = 1; i < num_rqst; i++) { 4591 struct smb_rqst *old = &old_rq[i - 1]; 4592 struct smb_rqst *new = &new_rq[i]; 4593 struct folio_queue *buffer = NULL; 4594 size_t size = iov_iter_count(&old->rq_iter); 4595 4596 orig_len += smb_rqst_len(server, old); 4597 new->rq_iov = old->rq_iov; 4598 new->rq_nvec = old->rq_nvec; 4599 4600 if (size > 0) { 4601 buffer = cifs_alloc_folioq_buffer(size); 4602 if (!buffer) 4603 goto err_free; 4604 4605 new->rq_buffer = buffer; 4606 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE, 4607 buffer, 0, 0, size); 4608 4609 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) { 4610 rc = -EIO; 4611 goto err_free; 4612 } 4613 } 4614 } 4615 4616 /* fill the 1st iov with a transform header */ 4617 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4618 4619 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4620 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4621 if (rc) 4622 goto err_free; 4623 4624 return rc; 4625 4626 err_free: 4627 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4628 return rc; 4629 } 4630 4631 static int 4632 smb3_is_transform_hdr(void *buf) 4633 { 4634 struct smb2_transform_hdr *trhdr = buf; 4635 4636 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4637 } 4638 4639 static int 4640 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4641 unsigned int buf_data_size, struct iov_iter *iter, 4642 bool is_offloaded) 4643 { 4644 struct crypto_aead *tfm; 4645 struct smb_rqst rqst = {NULL}; 4646 struct kvec iov[2]; 4647 size_t iter_size = 0; 4648 int rc; 4649 4650 iov[0].iov_base = buf; 4651 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4652 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4653 iov[1].iov_len = buf_data_size; 4654 4655 rqst.rq_iov = iov; 4656 rqst.rq_nvec = 2; 4657 if (iter) { 4658 rqst.rq_iter = *iter; 4659 iter_size = iov_iter_count(iter); 4660 } 4661 4662 if (is_offloaded) { 4663 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4664 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4665 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4666 else 4667 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4668 if (IS_ERR(tfm)) { 4669 rc = PTR_ERR(tfm); 4670 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4671 4672 return rc; 4673 } 4674 } else { 4675 rc = smb3_crypto_aead_allocate(server); 4676 if (unlikely(rc)) 4677 return rc; 4678 tfm = server->secmech.dec; 4679 } 4680 4681 rc = crypt_message(server, 1, &rqst, 0, tfm); 4682 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4683 4684 if (is_offloaded) 4685 crypto_free_aead(tfm); 4686 4687 if (rc) 4688 return rc; 4689 4690 memmove(buf, iov[1].iov_base, buf_data_size); 4691 4692 if (!is_offloaded) 4693 server->total_read = buf_data_size + iter_size; 4694 4695 return rc; 4696 } 4697 4698 static int 4699 cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size, 4700 size_t skip, struct iov_iter *iter) 4701 { 4702 for (; folioq; folioq = folioq->next) { 4703 for (int s = 0; s < folioq_count(folioq); s++) { 4704 struct folio *folio = folioq_folio(folioq, s); 4705 size_t fsize = folio_size(folio); 4706 size_t n, len = umin(fsize - skip, data_size); 4707 4708 n = copy_folio_to_iter(folio, skip, len, iter); 4709 if (n != len) { 4710 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4711 return -EIO; 4712 } 4713 data_size -= n; 4714 skip = 0; 4715 } 4716 } 4717 4718 return 0; 4719 } 4720 4721 static int 4722 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4723 char *buf, unsigned int buf_len, struct folio_queue *buffer, 4724 unsigned int buffer_len, bool is_offloaded) 4725 { 4726 unsigned int data_offset; 4727 unsigned int data_len; 4728 unsigned int cur_off; 4729 unsigned int cur_page_idx; 4730 unsigned int pad_len; 4731 struct cifs_io_subrequest *rdata = mid->callback_data; 4732 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4733 size_t copied; 4734 bool use_rdma_mr = false; 4735 4736 if (shdr->Command != SMB2_READ) { 4737 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4738 return -EOPNOTSUPP; 4739 } 4740 4741 if (server->ops->is_session_expired && 4742 server->ops->is_session_expired(buf)) { 4743 if (!is_offloaded) 4744 cifs_reconnect(server, true); 4745 return -1; 4746 } 4747 4748 if (server->ops->is_status_pending && 4749 server->ops->is_status_pending(buf, server)) 4750 return -1; 4751 4752 /* set up first two iov to get credits */ 4753 rdata->iov[0].iov_base = buf; 4754 rdata->iov[0].iov_len = 0; 4755 rdata->iov[1].iov_base = buf; 4756 rdata->iov[1].iov_len = 4757 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4758 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4759 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4760 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4761 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4762 4763 rdata->result = server->ops->map_error(buf, true); 4764 if (rdata->result != 0) { 4765 cifs_dbg(FYI, "%s: server returned error %d\n", 4766 __func__, rdata->result); 4767 /* normal error on read response */ 4768 if (is_offloaded) 4769 mid->mid_state = MID_RESPONSE_RECEIVED; 4770 else 4771 dequeue_mid(mid, false); 4772 return 0; 4773 } 4774 4775 data_offset = server->ops->read_data_offset(buf); 4776 #ifdef CONFIG_CIFS_SMB_DIRECT 4777 use_rdma_mr = rdata->mr; 4778 #endif 4779 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4780 4781 if (data_offset < server->vals->read_rsp_size) { 4782 /* 4783 * win2k8 sometimes sends an offset of 0 when the read 4784 * is beyond the EOF. Treat it as if the data starts just after 4785 * the header. 4786 */ 4787 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4788 __func__, data_offset); 4789 data_offset = server->vals->read_rsp_size; 4790 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4791 /* data_offset is beyond the end of smallbuf */ 4792 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4793 __func__, data_offset); 4794 rdata->result = -EIO; 4795 if (is_offloaded) 4796 mid->mid_state = MID_RESPONSE_MALFORMED; 4797 else 4798 dequeue_mid(mid, rdata->result); 4799 return 0; 4800 } 4801 4802 pad_len = data_offset - server->vals->read_rsp_size; 4803 4804 if (buf_len <= data_offset) { 4805 /* read response payload is in pages */ 4806 cur_page_idx = pad_len / PAGE_SIZE; 4807 cur_off = pad_len % PAGE_SIZE; 4808 4809 if (cur_page_idx != 0) { 4810 /* data offset is beyond the 1st page of response */ 4811 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4812 __func__, data_offset); 4813 rdata->result = -EIO; 4814 if (is_offloaded) 4815 mid->mid_state = MID_RESPONSE_MALFORMED; 4816 else 4817 dequeue_mid(mid, rdata->result); 4818 return 0; 4819 } 4820 4821 if (data_len > buffer_len - pad_len) { 4822 /* data_len is corrupt -- discard frame */ 4823 rdata->result = -EIO; 4824 if (is_offloaded) 4825 mid->mid_state = MID_RESPONSE_MALFORMED; 4826 else 4827 dequeue_mid(mid, rdata->result); 4828 return 0; 4829 } 4830 4831 /* Copy the data to the output I/O iterator. */ 4832 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len, 4833 cur_off, &rdata->subreq.io_iter); 4834 if (rdata->result != 0) { 4835 if (is_offloaded) 4836 mid->mid_state = MID_RESPONSE_MALFORMED; 4837 else 4838 dequeue_mid(mid, rdata->result); 4839 return 0; 4840 } 4841 rdata->got_bytes = buffer_len; 4842 4843 } else if (buf_len >= data_offset + data_len) { 4844 /* read response payload is in buf */ 4845 WARN_ONCE(buffer, "read data can be either in buf or in buffer"); 4846 copied = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4847 if (copied == 0) 4848 return -EIO; 4849 rdata->got_bytes = copied; 4850 } else { 4851 /* read response payload cannot be in both buf and pages */ 4852 WARN_ONCE(1, "buf can not contain only a part of read data"); 4853 rdata->result = -EIO; 4854 if (is_offloaded) 4855 mid->mid_state = MID_RESPONSE_MALFORMED; 4856 else 4857 dequeue_mid(mid, rdata->result); 4858 return 0; 4859 } 4860 4861 if (is_offloaded) 4862 mid->mid_state = MID_RESPONSE_RECEIVED; 4863 else 4864 dequeue_mid(mid, false); 4865 return 0; 4866 } 4867 4868 struct smb2_decrypt_work { 4869 struct work_struct decrypt; 4870 struct TCP_Server_Info *server; 4871 struct folio_queue *buffer; 4872 char *buf; 4873 unsigned int len; 4874 }; 4875 4876 4877 static void smb2_decrypt_offload(struct work_struct *work) 4878 { 4879 struct smb2_decrypt_work *dw = container_of(work, 4880 struct smb2_decrypt_work, decrypt); 4881 int rc; 4882 struct mid_q_entry *mid; 4883 struct iov_iter iter; 4884 4885 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len); 4886 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4887 &iter, true); 4888 if (rc) { 4889 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4890 goto free_pages; 4891 } 4892 4893 dw->server->lstrp = jiffies; 4894 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4895 if (mid == NULL) 4896 cifs_dbg(FYI, "mid not found\n"); 4897 else { 4898 mid->decrypted = true; 4899 rc = handle_read_data(dw->server, mid, dw->buf, 4900 dw->server->vals->read_rsp_size, 4901 dw->buffer, dw->len, 4902 true); 4903 if (rc >= 0) { 4904 #ifdef CONFIG_CIFS_STATS2 4905 mid->when_received = jiffies; 4906 #endif 4907 if (dw->server->ops->is_network_name_deleted) 4908 dw->server->ops->is_network_name_deleted(dw->buf, 4909 dw->server); 4910 4911 mid_execute_callback(mid); 4912 } else { 4913 spin_lock(&dw->server->srv_lock); 4914 if (dw->server->tcpStatus == CifsNeedReconnect) { 4915 spin_lock(&dw->server->mid_queue_lock); 4916 mid->mid_state = MID_RETRY_NEEDED; 4917 spin_unlock(&dw->server->mid_queue_lock); 4918 spin_unlock(&dw->server->srv_lock); 4919 mid_execute_callback(mid); 4920 } else { 4921 spin_lock(&dw->server->mid_queue_lock); 4922 mid->mid_state = MID_REQUEST_SUBMITTED; 4923 mid->deleted_from_q = false; 4924 list_add_tail(&mid->qhead, 4925 &dw->server->pending_mid_q); 4926 spin_unlock(&dw->server->mid_queue_lock); 4927 spin_unlock(&dw->server->srv_lock); 4928 } 4929 } 4930 release_mid(mid); 4931 } 4932 4933 free_pages: 4934 cifs_clear_folioq_buffer(dw->buffer); 4935 cifs_small_buf_release(dw->buf); 4936 kfree(dw); 4937 } 4938 4939 4940 static int 4941 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4942 int *num_mids) 4943 { 4944 char *buf = server->smallbuf; 4945 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4946 struct iov_iter iter; 4947 unsigned int len; 4948 unsigned int buflen = server->pdu_size; 4949 int rc; 4950 struct smb2_decrypt_work *dw; 4951 4952 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4953 if (!dw) 4954 return -ENOMEM; 4955 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4956 dw->server = server; 4957 4958 *num_mids = 1; 4959 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4960 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4961 4962 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4963 if (rc < 0) 4964 goto free_dw; 4965 server->total_read += rc; 4966 4967 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4968 server->vals->read_rsp_size; 4969 dw->len = len; 4970 len = round_up(dw->len, PAGE_SIZE); 4971 4972 rc = -ENOMEM; 4973 dw->buffer = cifs_alloc_folioq_buffer(len); 4974 if (!dw->buffer) 4975 goto discard_data; 4976 4977 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len); 4978 4979 /* Read the data into the buffer and clear excess bufferage. */ 4980 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4981 if (rc < 0) 4982 goto discard_data; 4983 4984 server->total_read += rc; 4985 if (rc < len) { 4986 struct iov_iter tmp = iter; 4987 4988 iov_iter_advance(&tmp, rc); 4989 iov_iter_zero(len - rc, &tmp); 4990 } 4991 iov_iter_truncate(&iter, dw->len); 4992 4993 rc = cifs_discard_remaining_data(server); 4994 if (rc) 4995 goto free_pages; 4996 4997 /* 4998 * For large reads, offload to different thread for better performance, 4999 * use more cores decrypting which can be expensive 5000 */ 5001 5002 if ((server->min_offload) && (server->in_flight > 1) && 5003 (server->pdu_size >= server->min_offload)) { 5004 dw->buf = server->smallbuf; 5005 server->smallbuf = (char *)cifs_small_buf_get(); 5006 5007 queue_work(decrypt_wq, &dw->decrypt); 5008 *num_mids = 0; /* worker thread takes care of finding mid */ 5009 return -1; 5010 } 5011 5012 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 5013 &iter, false); 5014 if (rc) 5015 goto free_pages; 5016 5017 *mid = smb2_find_mid(server, buf); 5018 if (*mid == NULL) { 5019 cifs_dbg(FYI, "mid not found\n"); 5020 } else { 5021 cifs_dbg(FYI, "mid found\n"); 5022 (*mid)->decrypted = true; 5023 rc = handle_read_data(server, *mid, buf, 5024 server->vals->read_rsp_size, 5025 dw->buffer, dw->len, false); 5026 if (rc >= 0) { 5027 if (server->ops->is_network_name_deleted) { 5028 server->ops->is_network_name_deleted(buf, 5029 server); 5030 } 5031 } 5032 } 5033 5034 free_pages: 5035 cifs_clear_folioq_buffer(dw->buffer); 5036 free_dw: 5037 kfree(dw); 5038 return rc; 5039 discard_data: 5040 cifs_discard_remaining_data(server); 5041 goto free_pages; 5042 } 5043 5044 static int 5045 receive_encrypted_standard(struct TCP_Server_Info *server, 5046 struct mid_q_entry **mids, char **bufs, 5047 int *num_mids) 5048 { 5049 int ret, length; 5050 char *buf = server->smallbuf; 5051 struct smb2_hdr *shdr; 5052 unsigned int pdu_length = server->pdu_size; 5053 unsigned int buf_size; 5054 unsigned int next_cmd; 5055 struct mid_q_entry *mid_entry; 5056 int next_is_large; 5057 char *next_buffer = NULL; 5058 5059 *num_mids = 0; 5060 5061 /* switch to large buffer if too big for a small one */ 5062 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 5063 server->large_buf = true; 5064 memcpy(server->bigbuf, buf, server->total_read); 5065 buf = server->bigbuf; 5066 } 5067 5068 /* now read the rest */ 5069 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 5070 pdu_length - HEADER_SIZE(server) + 1); 5071 if (length < 0) 5072 return length; 5073 server->total_read += length; 5074 5075 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 5076 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 5077 if (length) 5078 return length; 5079 5080 next_is_large = server->large_buf; 5081 one_more: 5082 shdr = (struct smb2_hdr *)buf; 5083 next_cmd = le32_to_cpu(shdr->NextCommand); 5084 if (next_cmd) { 5085 if (WARN_ON_ONCE(next_cmd > pdu_length)) 5086 return -1; 5087 if (next_is_large) 5088 next_buffer = (char *)cifs_buf_get(); 5089 else 5090 next_buffer = (char *)cifs_small_buf_get(); 5091 if (!next_buffer) { 5092 cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); 5093 return -1; 5094 } 5095 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 5096 } 5097 5098 mid_entry = smb2_find_mid(server, buf); 5099 if (mid_entry == NULL) 5100 cifs_dbg(FYI, "mid not found\n"); 5101 else { 5102 cifs_dbg(FYI, "mid found\n"); 5103 mid_entry->decrypted = true; 5104 mid_entry->resp_buf_size = server->pdu_size; 5105 } 5106 5107 if (*num_mids >= MAX_COMPOUND) { 5108 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5109 return -1; 5110 } 5111 bufs[*num_mids] = buf; 5112 mids[(*num_mids)++] = mid_entry; 5113 5114 if (mid_entry && mid_entry->handle) 5115 ret = mid_entry->handle(server, mid_entry); 5116 else 5117 ret = cifs_handle_standard(server, mid_entry); 5118 5119 if (ret == 0 && next_cmd) { 5120 pdu_length -= next_cmd; 5121 server->large_buf = next_is_large; 5122 if (next_is_large) 5123 server->bigbuf = buf = next_buffer; 5124 else 5125 server->smallbuf = buf = next_buffer; 5126 goto one_more; 5127 } else if (ret != 0) { 5128 /* 5129 * ret != 0 here means that we didn't get to handle_mid() thus 5130 * server->smallbuf and server->bigbuf are still valid. We need 5131 * to free next_buffer because it is not going to be used 5132 * anywhere. 5133 */ 5134 if (next_is_large) 5135 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5136 else 5137 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5138 } 5139 5140 return ret; 5141 } 5142 5143 static int 5144 smb3_receive_transform(struct TCP_Server_Info *server, 5145 struct mid_q_entry **mids, char **bufs, int *num_mids) 5146 { 5147 char *buf = server->smallbuf; 5148 unsigned int pdu_length = server->pdu_size; 5149 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5150 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5151 5152 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5153 sizeof(struct smb2_hdr)) { 5154 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5155 pdu_length); 5156 cifs_reconnect(server, true); 5157 return -ECONNABORTED; 5158 } 5159 5160 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5161 cifs_server_dbg(VFS, "Transform message is broken\n"); 5162 cifs_reconnect(server, true); 5163 return -ECONNABORTED; 5164 } 5165 5166 /* TODO: add support for compounds containing READ. */ 5167 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5168 return receive_encrypted_read(server, &mids[0], num_mids); 5169 } 5170 5171 return receive_encrypted_standard(server, mids, bufs, num_mids); 5172 } 5173 5174 int 5175 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5176 { 5177 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5178 5179 return handle_read_data(server, mid, buf, server->pdu_size, 5180 NULL, 0, false); 5181 } 5182 5183 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5184 unsigned int *noff) 5185 { 5186 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5187 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5188 5189 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5190 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5191 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5192 return -EINVAL; 5193 } else { 5194 *noff = le32_to_cpu(hdr->NextCommand); 5195 } 5196 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5197 return -EINVAL; 5198 return 0; 5199 } 5200 5201 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5202 struct dentry *dentry, struct cifs_tcon *tcon, 5203 const char *full_path, umode_t mode, dev_t dev, 5204 const char *symname) 5205 { 5206 struct TCP_Server_Info *server = tcon->ses->server; 5207 struct cifs_open_parms oparms; 5208 struct cifs_open_info_data idata; 5209 struct cifs_io_parms io_parms = {}; 5210 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5211 struct cifs_fid fid; 5212 unsigned int bytes_written; 5213 u8 type[8]; 5214 int type_len = 0; 5215 struct { 5216 __le64 major; 5217 __le64 minor; 5218 } __packed pdev = {}; 5219 __le16 *symname_utf16 = NULL; 5220 u8 *data = NULL; 5221 int data_len = 0; 5222 struct kvec iov[3]; 5223 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5224 int rc; 5225 5226 switch (mode & S_IFMT) { 5227 case S_IFCHR: 5228 type_len = 8; 5229 memcpy(type, "IntxCHR\0", type_len); 5230 pdev.major = cpu_to_le64(MAJOR(dev)); 5231 pdev.minor = cpu_to_le64(MINOR(dev)); 5232 data = (u8 *)&pdev; 5233 data_len = sizeof(pdev); 5234 break; 5235 case S_IFBLK: 5236 type_len = 8; 5237 memcpy(type, "IntxBLK\0", type_len); 5238 pdev.major = cpu_to_le64(MAJOR(dev)); 5239 pdev.minor = cpu_to_le64(MINOR(dev)); 5240 data = (u8 *)&pdev; 5241 data_len = sizeof(pdev); 5242 break; 5243 case S_IFLNK: 5244 type_len = 8; 5245 memcpy(type, "IntxLNK\1", type_len); 5246 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname), 5247 &data_len, cifs_sb->local_nls, 5248 NO_MAP_UNI_RSVD); 5249 if (!symname_utf16) { 5250 rc = -ENOMEM; 5251 goto out; 5252 } 5253 data_len -= 2; /* symlink is without trailing wide-nul */ 5254 data = (u8 *)symname_utf16; 5255 break; 5256 case S_IFSOCK: 5257 type_len = 8; 5258 strscpy(type, "LnxSOCK"); 5259 data = (u8 *)&pdev; 5260 data_len = sizeof(pdev); 5261 break; 5262 case S_IFIFO: 5263 type_len = 8; 5264 strscpy(type, "LnxFIFO"); 5265 data = (u8 *)&pdev; 5266 data_len = sizeof(pdev); 5267 break; 5268 default: 5269 rc = -EPERM; 5270 goto out; 5271 } 5272 5273 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5274 FILE_CREATE, CREATE_NOT_DIR | 5275 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5276 oparms.fid = &fid; 5277 idata.contains_posix_file_info = false; 5278 rc = server->ops->open(xid, &oparms, &oplock, &idata); 5279 if (rc) 5280 goto out; 5281 5282 /* 5283 * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL 5284 * option. If not then server does not support ATTR_SYSTEM and newly 5285 * created file is not SFU compatible, which means that the call failed. 5286 */ 5287 if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) { 5288 rc = -EOPNOTSUPP; 5289 goto out_close; 5290 } 5291 5292 if (type_len + data_len > 0) { 5293 io_parms.pid = current->tgid; 5294 io_parms.tcon = tcon; 5295 io_parms.length = type_len + data_len; 5296 iov[1].iov_base = type; 5297 iov[1].iov_len = type_len; 5298 iov[2].iov_base = data; 5299 iov[2].iov_len = data_len; 5300 5301 rc = server->ops->sync_write(xid, &fid, &io_parms, 5302 &bytes_written, 5303 iov, ARRAY_SIZE(iov)-1); 5304 } 5305 5306 out_close: 5307 server->ops->close(xid, tcon, &fid); 5308 5309 /* 5310 * If CREATE was successful but either setting ATTR_SYSTEM failed or 5311 * writing type/data information failed then remove the intermediate 5312 * object created by CREATE. Otherwise intermediate empty object stay 5313 * on the server. 5314 */ 5315 if (rc) 5316 server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL); 5317 5318 out: 5319 kfree(symname_utf16); 5320 return rc; 5321 } 5322 5323 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5324 struct dentry *dentry, struct cifs_tcon *tcon, 5325 const char *full_path, umode_t mode, dev_t dev) 5326 { 5327 struct inode *new = NULL; 5328 int rc; 5329 5330 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5331 full_path, mode, dev, NULL); 5332 if (rc) 5333 return rc; 5334 5335 if (tcon->posix_extensions) { 5336 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5337 inode->i_sb, xid); 5338 } else if (tcon->unix_ext) { 5339 rc = cifs_get_inode_info_unix(&new, full_path, 5340 inode->i_sb, xid); 5341 } else { 5342 rc = cifs_get_inode_info(&new, full_path, NULL, 5343 inode->i_sb, xid, NULL); 5344 } 5345 if (!rc) 5346 d_instantiate(dentry, new); 5347 return rc; 5348 } 5349 5350 static int smb2_make_node(unsigned int xid, struct inode *inode, 5351 struct dentry *dentry, struct cifs_tcon *tcon, 5352 const char *full_path, umode_t mode, dev_t dev) 5353 { 5354 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5355 int rc = -EOPNOTSUPP; 5356 5357 /* 5358 * Check if mounted with mount parm 'sfu' mount parm. 5359 * SFU emulation should work with all servers, but only 5360 * supports block and char device, socket & fifo, 5361 * and was used by default in earlier versions of Windows 5362 */ 5363 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5364 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5365 full_path, mode, dev); 5366 } else if (CIFS_REPARSE_SUPPORT(tcon)) { 5367 rc = mknod_reparse(xid, inode, dentry, tcon, 5368 full_path, mode, dev); 5369 } 5370 return rc; 5371 } 5372 5373 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5374 struct smb_version_operations smb20_operations = { 5375 .compare_fids = smb2_compare_fids, 5376 .setup_request = smb2_setup_request, 5377 .setup_async_request = smb2_setup_async_request, 5378 .check_receive = smb2_check_receive, 5379 .add_credits = smb2_add_credits, 5380 .set_credits = smb2_set_credits, 5381 .get_credits_field = smb2_get_credits_field, 5382 .get_credits = smb2_get_credits, 5383 .wait_mtu_credits = cifs_wait_mtu_credits, 5384 .get_next_mid = smb2_get_next_mid, 5385 .revert_current_mid = smb2_revert_current_mid, 5386 .read_data_offset = smb2_read_data_offset, 5387 .read_data_length = smb2_read_data_length, 5388 .map_error = map_smb2_to_linux_error, 5389 .find_mid = smb2_find_mid, 5390 .check_message = smb2_check_message, 5391 .dump_detail = smb2_dump_detail, 5392 .clear_stats = smb2_clear_stats, 5393 .print_stats = smb2_print_stats, 5394 .is_oplock_break = smb2_is_valid_oplock_break, 5395 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5396 .downgrade_oplock = smb2_downgrade_oplock, 5397 .need_neg = smb2_need_neg, 5398 .negotiate = smb2_negotiate, 5399 .negotiate_wsize = smb2_negotiate_wsize, 5400 .negotiate_rsize = smb2_negotiate_rsize, 5401 .sess_setup = SMB2_sess_setup, 5402 .logoff = SMB2_logoff, 5403 .tree_connect = SMB2_tcon, 5404 .tree_disconnect = SMB2_tdis, 5405 .qfs_tcon = smb2_qfs_tcon, 5406 .is_path_accessible = smb2_is_path_accessible, 5407 .can_echo = smb2_can_echo, 5408 .echo = SMB2_echo, 5409 .query_path_info = smb2_query_path_info, 5410 .query_reparse_point = smb2_query_reparse_point, 5411 .get_srv_inum = smb2_get_srv_inum, 5412 .query_file_info = smb2_query_file_info, 5413 .set_path_size = smb2_set_path_size, 5414 .set_file_size = smb2_set_file_size, 5415 .set_file_info = smb2_set_file_info, 5416 .set_compression = smb2_set_compression, 5417 .mkdir = smb2_mkdir, 5418 .mkdir_setinfo = smb2_mkdir_setinfo, 5419 .rmdir = smb2_rmdir, 5420 .unlink = smb2_unlink, 5421 .rename = smb2_rename_path, 5422 .create_hardlink = smb2_create_hardlink, 5423 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5424 .query_mf_symlink = smb3_query_mf_symlink, 5425 .create_mf_symlink = smb3_create_mf_symlink, 5426 .create_reparse_inode = smb2_create_reparse_inode, 5427 .open = smb2_open_file, 5428 .set_fid = smb2_set_fid, 5429 .close = smb2_close_file, 5430 .flush = smb2_flush_file, 5431 .async_readv = smb2_async_readv, 5432 .async_writev = smb2_async_writev, 5433 .sync_read = smb2_sync_read, 5434 .sync_write = smb2_sync_write, 5435 .query_dir_first = smb2_query_dir_first, 5436 .query_dir_next = smb2_query_dir_next, 5437 .close_dir = smb2_close_dir, 5438 .calc_smb_size = smb2_calc_size, 5439 .is_status_pending = smb2_is_status_pending, 5440 .is_session_expired = smb2_is_session_expired, 5441 .oplock_response = smb2_oplock_response, 5442 .queryfs = smb2_queryfs, 5443 .mand_lock = smb2_mand_lock, 5444 .mand_unlock_range = smb2_unlock_range, 5445 .push_mand_locks = smb2_push_mandatory_locks, 5446 .get_lease_key = smb2_get_lease_key, 5447 .set_lease_key = smb2_set_lease_key, 5448 .new_lease_key = smb2_new_lease_key, 5449 .calc_signature = smb2_calc_signature, 5450 .is_read_op = smb2_is_read_op, 5451 .set_oplock_level = smb2_set_oplock_level, 5452 .create_lease_buf = smb2_create_lease_buf, 5453 .parse_lease_buf = smb2_parse_lease_buf, 5454 .copychunk_range = smb2_copychunk_range, 5455 .wp_retry_size = smb2_wp_retry_size, 5456 .dir_needs_close = smb2_dir_needs_close, 5457 .get_dfs_refer = smb2_get_dfs_refer, 5458 .select_sectype = smb2_select_sectype, 5459 #ifdef CONFIG_CIFS_XATTR 5460 .query_all_EAs = smb2_query_eas, 5461 .set_EA = smb2_set_ea, 5462 #endif /* CIFS_XATTR */ 5463 .get_acl = get_smb2_acl, 5464 .get_acl_by_fid = get_smb2_acl_by_fid, 5465 .set_acl = set_smb2_acl, 5466 .next_header = smb2_next_header, 5467 .ioctl_query_info = smb2_ioctl_query_info, 5468 .make_node = smb2_make_node, 5469 .fiemap = smb3_fiemap, 5470 .llseek = smb3_llseek, 5471 .is_status_io_timeout = smb2_is_status_io_timeout, 5472 .is_network_name_deleted = smb2_is_network_name_deleted, 5473 .rename_pending_delete = smb2_rename_pending_delete, 5474 }; 5475 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5476 5477 struct smb_version_operations smb21_operations = { 5478 .compare_fids = smb2_compare_fids, 5479 .setup_request = smb2_setup_request, 5480 .setup_async_request = smb2_setup_async_request, 5481 .check_receive = smb2_check_receive, 5482 .add_credits = smb2_add_credits, 5483 .set_credits = smb2_set_credits, 5484 .get_credits_field = smb2_get_credits_field, 5485 .get_credits = smb2_get_credits, 5486 .wait_mtu_credits = smb2_wait_mtu_credits, 5487 .adjust_credits = smb2_adjust_credits, 5488 .get_next_mid = smb2_get_next_mid, 5489 .revert_current_mid = smb2_revert_current_mid, 5490 .read_data_offset = smb2_read_data_offset, 5491 .read_data_length = smb2_read_data_length, 5492 .map_error = map_smb2_to_linux_error, 5493 .find_mid = smb2_find_mid, 5494 .check_message = smb2_check_message, 5495 .dump_detail = smb2_dump_detail, 5496 .clear_stats = smb2_clear_stats, 5497 .print_stats = smb2_print_stats, 5498 .is_oplock_break = smb2_is_valid_oplock_break, 5499 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5500 .downgrade_oplock = smb2_downgrade_oplock, 5501 .need_neg = smb2_need_neg, 5502 .negotiate = smb2_negotiate, 5503 .negotiate_wsize = smb2_negotiate_wsize, 5504 .negotiate_rsize = smb2_negotiate_rsize, 5505 .sess_setup = SMB2_sess_setup, 5506 .logoff = SMB2_logoff, 5507 .tree_connect = SMB2_tcon, 5508 .tree_disconnect = SMB2_tdis, 5509 .qfs_tcon = smb2_qfs_tcon, 5510 .is_path_accessible = smb2_is_path_accessible, 5511 .can_echo = smb2_can_echo, 5512 .echo = SMB2_echo, 5513 .query_path_info = smb2_query_path_info, 5514 .query_reparse_point = smb2_query_reparse_point, 5515 .get_srv_inum = smb2_get_srv_inum, 5516 .query_file_info = smb2_query_file_info, 5517 .set_path_size = smb2_set_path_size, 5518 .set_file_size = smb2_set_file_size, 5519 .set_file_info = smb2_set_file_info, 5520 .set_compression = smb2_set_compression, 5521 .mkdir = smb2_mkdir, 5522 .mkdir_setinfo = smb2_mkdir_setinfo, 5523 .rmdir = smb2_rmdir, 5524 .unlink = smb2_unlink, 5525 .rename = smb2_rename_path, 5526 .create_hardlink = smb2_create_hardlink, 5527 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5528 .query_mf_symlink = smb3_query_mf_symlink, 5529 .create_mf_symlink = smb3_create_mf_symlink, 5530 .create_reparse_inode = smb2_create_reparse_inode, 5531 .open = smb2_open_file, 5532 .set_fid = smb2_set_fid, 5533 .close = smb2_close_file, 5534 .flush = smb2_flush_file, 5535 .async_readv = smb2_async_readv, 5536 .async_writev = smb2_async_writev, 5537 .sync_read = smb2_sync_read, 5538 .sync_write = smb2_sync_write, 5539 .query_dir_first = smb2_query_dir_first, 5540 .query_dir_next = smb2_query_dir_next, 5541 .close_dir = smb2_close_dir, 5542 .calc_smb_size = smb2_calc_size, 5543 .is_status_pending = smb2_is_status_pending, 5544 .is_session_expired = smb2_is_session_expired, 5545 .oplock_response = smb2_oplock_response, 5546 .queryfs = smb2_queryfs, 5547 .mand_lock = smb2_mand_lock, 5548 .mand_unlock_range = smb2_unlock_range, 5549 .push_mand_locks = smb2_push_mandatory_locks, 5550 .get_lease_key = smb2_get_lease_key, 5551 .set_lease_key = smb2_set_lease_key, 5552 .new_lease_key = smb2_new_lease_key, 5553 .calc_signature = smb2_calc_signature, 5554 .is_read_op = smb21_is_read_op, 5555 .set_oplock_level = smb21_set_oplock_level, 5556 .create_lease_buf = smb2_create_lease_buf, 5557 .parse_lease_buf = smb2_parse_lease_buf, 5558 .copychunk_range = smb2_copychunk_range, 5559 .wp_retry_size = smb2_wp_retry_size, 5560 .dir_needs_close = smb2_dir_needs_close, 5561 .enum_snapshots = smb3_enum_snapshots, 5562 .notify = smb3_notify, 5563 .get_dfs_refer = smb2_get_dfs_refer, 5564 .select_sectype = smb2_select_sectype, 5565 #ifdef CONFIG_CIFS_XATTR 5566 .query_all_EAs = smb2_query_eas, 5567 .set_EA = smb2_set_ea, 5568 #endif /* CIFS_XATTR */ 5569 .get_acl = get_smb2_acl, 5570 .get_acl_by_fid = get_smb2_acl_by_fid, 5571 .set_acl = set_smb2_acl, 5572 .next_header = smb2_next_header, 5573 .ioctl_query_info = smb2_ioctl_query_info, 5574 .make_node = smb2_make_node, 5575 .fiemap = smb3_fiemap, 5576 .llseek = smb3_llseek, 5577 .is_status_io_timeout = smb2_is_status_io_timeout, 5578 .is_network_name_deleted = smb2_is_network_name_deleted, 5579 .rename_pending_delete = smb2_rename_pending_delete, 5580 }; 5581 5582 struct smb_version_operations smb30_operations = { 5583 .compare_fids = smb2_compare_fids, 5584 .setup_request = smb2_setup_request, 5585 .setup_async_request = smb2_setup_async_request, 5586 .check_receive = smb2_check_receive, 5587 .add_credits = smb2_add_credits, 5588 .set_credits = smb2_set_credits, 5589 .get_credits_field = smb2_get_credits_field, 5590 .get_credits = smb2_get_credits, 5591 .wait_mtu_credits = smb2_wait_mtu_credits, 5592 .adjust_credits = smb2_adjust_credits, 5593 .get_next_mid = smb2_get_next_mid, 5594 .revert_current_mid = smb2_revert_current_mid, 5595 .read_data_offset = smb2_read_data_offset, 5596 .read_data_length = smb2_read_data_length, 5597 .map_error = map_smb2_to_linux_error, 5598 .find_mid = smb2_find_mid, 5599 .check_message = smb2_check_message, 5600 .dump_detail = smb2_dump_detail, 5601 .clear_stats = smb2_clear_stats, 5602 .print_stats = smb2_print_stats, 5603 .dump_share_caps = smb2_dump_share_caps, 5604 .is_oplock_break = smb2_is_valid_oplock_break, 5605 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5606 .downgrade_oplock = smb3_downgrade_oplock, 5607 .need_neg = smb2_need_neg, 5608 .negotiate = smb2_negotiate, 5609 .negotiate_wsize = smb3_negotiate_wsize, 5610 .negotiate_rsize = smb3_negotiate_rsize, 5611 .sess_setup = SMB2_sess_setup, 5612 .logoff = SMB2_logoff, 5613 .tree_connect = SMB2_tcon, 5614 .tree_disconnect = SMB2_tdis, 5615 .qfs_tcon = smb3_qfs_tcon, 5616 .query_server_interfaces = SMB3_request_interfaces, 5617 .is_path_accessible = smb2_is_path_accessible, 5618 .can_echo = smb2_can_echo, 5619 .echo = SMB2_echo, 5620 .query_path_info = smb2_query_path_info, 5621 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5622 .query_reparse_point = smb2_query_reparse_point, 5623 .get_srv_inum = smb2_get_srv_inum, 5624 .query_file_info = smb2_query_file_info, 5625 .set_path_size = smb2_set_path_size, 5626 .set_file_size = smb2_set_file_size, 5627 .set_file_info = smb2_set_file_info, 5628 .set_compression = smb2_set_compression, 5629 .mkdir = smb2_mkdir, 5630 .mkdir_setinfo = smb2_mkdir_setinfo, 5631 .rmdir = smb2_rmdir, 5632 .unlink = smb2_unlink, 5633 .rename = smb2_rename_path, 5634 .create_hardlink = smb2_create_hardlink, 5635 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5636 .query_mf_symlink = smb3_query_mf_symlink, 5637 .create_mf_symlink = smb3_create_mf_symlink, 5638 .create_reparse_inode = smb2_create_reparse_inode, 5639 .open = smb2_open_file, 5640 .set_fid = smb2_set_fid, 5641 .close = smb2_close_file, 5642 .close_getattr = smb2_close_getattr, 5643 .flush = smb2_flush_file, 5644 .async_readv = smb2_async_readv, 5645 .async_writev = smb2_async_writev, 5646 .sync_read = smb2_sync_read, 5647 .sync_write = smb2_sync_write, 5648 .query_dir_first = smb2_query_dir_first, 5649 .query_dir_next = smb2_query_dir_next, 5650 .close_dir = smb2_close_dir, 5651 .calc_smb_size = smb2_calc_size, 5652 .is_status_pending = smb2_is_status_pending, 5653 .is_session_expired = smb2_is_session_expired, 5654 .oplock_response = smb2_oplock_response, 5655 .queryfs = smb2_queryfs, 5656 .mand_lock = smb2_mand_lock, 5657 .mand_unlock_range = smb2_unlock_range, 5658 .push_mand_locks = smb2_push_mandatory_locks, 5659 .get_lease_key = smb2_get_lease_key, 5660 .set_lease_key = smb2_set_lease_key, 5661 .new_lease_key = smb2_new_lease_key, 5662 .generate_signingkey = generate_smb30signingkey, 5663 .calc_signature = smb3_calc_signature, 5664 .set_integrity = smb3_set_integrity, 5665 .is_read_op = smb21_is_read_op, 5666 .set_oplock_level = smb3_set_oplock_level, 5667 .create_lease_buf = smb3_create_lease_buf, 5668 .parse_lease_buf = smb3_parse_lease_buf, 5669 .copychunk_range = smb2_copychunk_range, 5670 .duplicate_extents = smb2_duplicate_extents, 5671 .validate_negotiate = smb3_validate_negotiate, 5672 .wp_retry_size = smb2_wp_retry_size, 5673 .dir_needs_close = smb2_dir_needs_close, 5674 .fallocate = smb3_fallocate, 5675 .enum_snapshots = smb3_enum_snapshots, 5676 .notify = smb3_notify, 5677 .init_transform_rq = smb3_init_transform_rq, 5678 .is_transform_hdr = smb3_is_transform_hdr, 5679 .receive_transform = smb3_receive_transform, 5680 .get_dfs_refer = smb2_get_dfs_refer, 5681 .select_sectype = smb2_select_sectype, 5682 #ifdef CONFIG_CIFS_XATTR 5683 .query_all_EAs = smb2_query_eas, 5684 .set_EA = smb2_set_ea, 5685 #endif /* CIFS_XATTR */ 5686 .get_acl = get_smb2_acl, 5687 .get_acl_by_fid = get_smb2_acl_by_fid, 5688 .set_acl = set_smb2_acl, 5689 .next_header = smb2_next_header, 5690 .ioctl_query_info = smb2_ioctl_query_info, 5691 .make_node = smb2_make_node, 5692 .fiemap = smb3_fiemap, 5693 .llseek = smb3_llseek, 5694 .is_status_io_timeout = smb2_is_status_io_timeout, 5695 .is_network_name_deleted = smb2_is_network_name_deleted, 5696 .rename_pending_delete = smb2_rename_pending_delete, 5697 }; 5698 5699 struct smb_version_operations smb311_operations = { 5700 .compare_fids = smb2_compare_fids, 5701 .setup_request = smb2_setup_request, 5702 .setup_async_request = smb2_setup_async_request, 5703 .check_receive = smb2_check_receive, 5704 .add_credits = smb2_add_credits, 5705 .set_credits = smb2_set_credits, 5706 .get_credits_field = smb2_get_credits_field, 5707 .get_credits = smb2_get_credits, 5708 .wait_mtu_credits = smb2_wait_mtu_credits, 5709 .adjust_credits = smb2_adjust_credits, 5710 .get_next_mid = smb2_get_next_mid, 5711 .revert_current_mid = smb2_revert_current_mid, 5712 .read_data_offset = smb2_read_data_offset, 5713 .read_data_length = smb2_read_data_length, 5714 .map_error = map_smb2_to_linux_error, 5715 .find_mid = smb2_find_mid, 5716 .check_message = smb2_check_message, 5717 .dump_detail = smb2_dump_detail, 5718 .clear_stats = smb2_clear_stats, 5719 .print_stats = smb2_print_stats, 5720 .dump_share_caps = smb2_dump_share_caps, 5721 .is_oplock_break = smb2_is_valid_oplock_break, 5722 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5723 .downgrade_oplock = smb3_downgrade_oplock, 5724 .need_neg = smb2_need_neg, 5725 .negotiate = smb2_negotiate, 5726 .negotiate_wsize = smb3_negotiate_wsize, 5727 .negotiate_rsize = smb3_negotiate_rsize, 5728 .sess_setup = SMB2_sess_setup, 5729 .logoff = SMB2_logoff, 5730 .tree_connect = SMB2_tcon, 5731 .tree_disconnect = SMB2_tdis, 5732 .qfs_tcon = smb3_qfs_tcon, 5733 .query_server_interfaces = SMB3_request_interfaces, 5734 .is_path_accessible = smb2_is_path_accessible, 5735 .can_echo = smb2_can_echo, 5736 .echo = SMB2_echo, 5737 .query_path_info = smb2_query_path_info, 5738 .query_reparse_point = smb2_query_reparse_point, 5739 .get_srv_inum = smb2_get_srv_inum, 5740 .query_file_info = smb2_query_file_info, 5741 .set_path_size = smb2_set_path_size, 5742 .set_file_size = smb2_set_file_size, 5743 .set_file_info = smb2_set_file_info, 5744 .set_compression = smb2_set_compression, 5745 .mkdir = smb2_mkdir, 5746 .mkdir_setinfo = smb2_mkdir_setinfo, 5747 .posix_mkdir = smb311_posix_mkdir, 5748 .rmdir = smb2_rmdir, 5749 .unlink = smb2_unlink, 5750 .rename = smb2_rename_path, 5751 .create_hardlink = smb2_create_hardlink, 5752 .get_reparse_point_buffer = smb2_get_reparse_point_buffer, 5753 .query_mf_symlink = smb3_query_mf_symlink, 5754 .create_mf_symlink = smb3_create_mf_symlink, 5755 .create_reparse_inode = smb2_create_reparse_inode, 5756 .open = smb2_open_file, 5757 .set_fid = smb2_set_fid, 5758 .close = smb2_close_file, 5759 .close_getattr = smb2_close_getattr, 5760 .flush = smb2_flush_file, 5761 .async_readv = smb2_async_readv, 5762 .async_writev = smb2_async_writev, 5763 .sync_read = smb2_sync_read, 5764 .sync_write = smb2_sync_write, 5765 .query_dir_first = smb2_query_dir_first, 5766 .query_dir_next = smb2_query_dir_next, 5767 .close_dir = smb2_close_dir, 5768 .calc_smb_size = smb2_calc_size, 5769 .is_status_pending = smb2_is_status_pending, 5770 .is_session_expired = smb2_is_session_expired, 5771 .oplock_response = smb2_oplock_response, 5772 .queryfs = smb311_queryfs, 5773 .mand_lock = smb2_mand_lock, 5774 .mand_unlock_range = smb2_unlock_range, 5775 .push_mand_locks = smb2_push_mandatory_locks, 5776 .get_lease_key = smb2_get_lease_key, 5777 .set_lease_key = smb2_set_lease_key, 5778 .new_lease_key = smb2_new_lease_key, 5779 .generate_signingkey = generate_smb311signingkey, 5780 .calc_signature = smb3_calc_signature, 5781 .set_integrity = smb3_set_integrity, 5782 .is_read_op = smb21_is_read_op, 5783 .set_oplock_level = smb3_set_oplock_level, 5784 .create_lease_buf = smb3_create_lease_buf, 5785 .parse_lease_buf = smb3_parse_lease_buf, 5786 .copychunk_range = smb2_copychunk_range, 5787 .duplicate_extents = smb2_duplicate_extents, 5788 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5789 .wp_retry_size = smb2_wp_retry_size, 5790 .dir_needs_close = smb2_dir_needs_close, 5791 .fallocate = smb3_fallocate, 5792 .enum_snapshots = smb3_enum_snapshots, 5793 .notify = smb3_notify, 5794 .init_transform_rq = smb3_init_transform_rq, 5795 .is_transform_hdr = smb3_is_transform_hdr, 5796 .receive_transform = smb3_receive_transform, 5797 .get_dfs_refer = smb2_get_dfs_refer, 5798 .select_sectype = smb2_select_sectype, 5799 #ifdef CONFIG_CIFS_XATTR 5800 .query_all_EAs = smb2_query_eas, 5801 .set_EA = smb2_set_ea, 5802 #endif /* CIFS_XATTR */ 5803 .get_acl = get_smb2_acl, 5804 .get_acl_by_fid = get_smb2_acl_by_fid, 5805 .set_acl = set_smb2_acl, 5806 .next_header = smb2_next_header, 5807 .ioctl_query_info = smb2_ioctl_query_info, 5808 .make_node = smb2_make_node, 5809 .fiemap = smb3_fiemap, 5810 .llseek = smb3_llseek, 5811 .is_status_io_timeout = smb2_is_status_io_timeout, 5812 .is_network_name_deleted = smb2_is_network_name_deleted, 5813 .rename_pending_delete = smb2_rename_pending_delete, 5814 }; 5815 5816 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5817 struct smb_version_values smb20_values = { 5818 .version_string = SMB20_VERSION_STRING, 5819 .protocol_id = SMB20_PROT_ID, 5820 .req_capabilities = 0, /* MBZ */ 5821 .large_lock_type = 0, 5822 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5823 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5824 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5825 .header_size = sizeof(struct smb2_hdr), 5826 .header_preamble_size = 0, 5827 .max_header_size = MAX_SMB2_HDR_SIZE, 5828 .read_rsp_size = sizeof(struct smb2_read_rsp), 5829 .lock_cmd = SMB2_LOCK, 5830 .cap_unix = 0, 5831 .cap_nt_find = SMB2_NT_FIND, 5832 .cap_large_files = SMB2_LARGE_FILES, 5833 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5834 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5835 .create_lease_size = sizeof(struct create_lease), 5836 }; 5837 #endif /* ALLOW_INSECURE_LEGACY */ 5838 5839 struct smb_version_values smb21_values = { 5840 .version_string = SMB21_VERSION_STRING, 5841 .protocol_id = SMB21_PROT_ID, 5842 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5843 .large_lock_type = 0, 5844 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5845 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5846 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5847 .header_size = sizeof(struct smb2_hdr), 5848 .header_preamble_size = 0, 5849 .max_header_size = MAX_SMB2_HDR_SIZE, 5850 .read_rsp_size = sizeof(struct smb2_read_rsp), 5851 .lock_cmd = SMB2_LOCK, 5852 .cap_unix = 0, 5853 .cap_nt_find = SMB2_NT_FIND, 5854 .cap_large_files = SMB2_LARGE_FILES, 5855 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5856 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5857 .create_lease_size = sizeof(struct create_lease), 5858 }; 5859 5860 struct smb_version_values smb3any_values = { 5861 .version_string = SMB3ANY_VERSION_STRING, 5862 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5863 .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, 5864 .large_lock_type = 0, 5865 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5866 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5867 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5868 .header_size = sizeof(struct smb2_hdr), 5869 .header_preamble_size = 0, 5870 .max_header_size = MAX_SMB2_HDR_SIZE, 5871 .read_rsp_size = sizeof(struct smb2_read_rsp), 5872 .lock_cmd = SMB2_LOCK, 5873 .cap_unix = 0, 5874 .cap_nt_find = SMB2_NT_FIND, 5875 .cap_large_files = SMB2_LARGE_FILES, 5876 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5877 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5878 .create_lease_size = sizeof(struct create_lease_v2), 5879 }; 5880 5881 struct smb_version_values smbdefault_values = { 5882 .version_string = SMBDEFAULT_VERSION_STRING, 5883 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5884 .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, 5885 .large_lock_type = 0, 5886 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5887 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5888 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5889 .header_size = sizeof(struct smb2_hdr), 5890 .header_preamble_size = 0, 5891 .max_header_size = MAX_SMB2_HDR_SIZE, 5892 .read_rsp_size = sizeof(struct smb2_read_rsp), 5893 .lock_cmd = SMB2_LOCK, 5894 .cap_unix = 0, 5895 .cap_nt_find = SMB2_NT_FIND, 5896 .cap_large_files = SMB2_LARGE_FILES, 5897 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5898 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5899 .create_lease_size = sizeof(struct create_lease_v2), 5900 }; 5901 5902 struct smb_version_values smb30_values = { 5903 .version_string = SMB30_VERSION_STRING, 5904 .protocol_id = SMB30_PROT_ID, 5905 .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, 5906 .large_lock_type = 0, 5907 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5908 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5909 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5910 .header_size = sizeof(struct smb2_hdr), 5911 .header_preamble_size = 0, 5912 .max_header_size = MAX_SMB2_HDR_SIZE, 5913 .read_rsp_size = sizeof(struct smb2_read_rsp), 5914 .lock_cmd = SMB2_LOCK, 5915 .cap_unix = 0, 5916 .cap_nt_find = SMB2_NT_FIND, 5917 .cap_large_files = SMB2_LARGE_FILES, 5918 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5919 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5920 .create_lease_size = sizeof(struct create_lease_v2), 5921 }; 5922 5923 struct smb_version_values smb302_values = { 5924 .version_string = SMB302_VERSION_STRING, 5925 .protocol_id = SMB302_PROT_ID, 5926 .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, 5927 .large_lock_type = 0, 5928 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5929 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5930 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5931 .header_size = sizeof(struct smb2_hdr), 5932 .header_preamble_size = 0, 5933 .max_header_size = MAX_SMB2_HDR_SIZE, 5934 .read_rsp_size = sizeof(struct smb2_read_rsp), 5935 .lock_cmd = SMB2_LOCK, 5936 .cap_unix = 0, 5937 .cap_nt_find = SMB2_NT_FIND, 5938 .cap_large_files = SMB2_LARGE_FILES, 5939 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5940 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5941 .create_lease_size = sizeof(struct create_lease_v2), 5942 }; 5943 5944 struct smb_version_values smb311_values = { 5945 .version_string = SMB311_VERSION_STRING, 5946 .protocol_id = SMB311_PROT_ID, 5947 .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, 5948 .large_lock_type = 0, 5949 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5950 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5951 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5952 .header_size = sizeof(struct smb2_hdr), 5953 .header_preamble_size = 0, 5954 .max_header_size = MAX_SMB2_HDR_SIZE, 5955 .read_rsp_size = sizeof(struct smb2_read_rsp), 5956 .lock_cmd = SMB2_LOCK, 5957 .cap_unix = 0, 5958 .cap_nt_find = SMB2_NT_FIND, 5959 .cap_large_files = SMB2_LARGE_FILES, 5960 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5961 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5962 .create_lease_size = sizeof(struct create_lease_v2), 5963 }; 5964