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 <uapi/linux/magic.h> 17 #include "cifsfs.h" 18 #include "cifsglob.h" 19 #include "smb2pdu.h" 20 #include "smb2proto.h" 21 #include "cifsproto.h" 22 #include "cifs_debug.h" 23 #include "cifs_unicode.h" 24 #include "smb2status.h" 25 #include "smb2glob.h" 26 #include "cifs_ioctl.h" 27 #include "smbdirect.h" 28 #include "fscache.h" 29 #include "fs_context.h" 30 #include "cached_dir.h" 31 32 /* Change credits for different ops and return the total number of credits */ 33 static int 34 change_conf(struct TCP_Server_Info *server) 35 { 36 server->credits += server->echo_credits + server->oplock_credits; 37 if (server->credits > server->max_credits) 38 server->credits = server->max_credits; 39 server->oplock_credits = server->echo_credits = 0; 40 switch (server->credits) { 41 case 0: 42 return 0; 43 case 1: 44 server->echoes = false; 45 server->oplocks = false; 46 break; 47 case 2: 48 server->echoes = true; 49 server->oplocks = false; 50 server->echo_credits = 1; 51 break; 52 default: 53 server->echoes = true; 54 if (enable_oplocks) { 55 server->oplocks = true; 56 server->oplock_credits = 1; 57 } else 58 server->oplocks = false; 59 60 server->echo_credits = 1; 61 } 62 server->credits -= server->echo_credits + server->oplock_credits; 63 return server->credits + server->echo_credits + server->oplock_credits; 64 } 65 66 static void 67 smb2_add_credits(struct TCP_Server_Info *server, 68 const struct cifs_credits *credits, const int optype) 69 { 70 int *val, rc = -1; 71 int scredits, in_flight; 72 unsigned int add = credits->value; 73 unsigned int instance = credits->instance; 74 bool reconnect_detected = false; 75 bool reconnect_with_invalid_credits = false; 76 77 spin_lock(&server->req_lock); 78 val = server->ops->get_credits_field(server, optype); 79 80 /* eg found case where write overlapping reconnect messed up credits */ 81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 82 reconnect_with_invalid_credits = true; 83 84 if ((instance == 0) || (instance == server->reconnect_instance)) 85 *val += add; 86 else 87 reconnect_detected = true; 88 89 if (*val > 65000) { 90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 91 pr_warn_once("server overflowed SMB3 credits\n"); 92 trace_smb3_overflow_credits(server->CurrentMid, 93 server->conn_id, server->hostname, *val, 94 add, server->in_flight); 95 } 96 WARN_ON_ONCE(server->in_flight == 0); 97 server->in_flight--; 98 if (server->in_flight == 0 && 99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 101 rc = change_conf(server); 102 /* 103 * Sometimes server returns 0 credits on oplock break ack - we need to 104 * rebalance credits in this case. 105 */ 106 else if (server->in_flight > 0 && server->oplock_credits == 0 && 107 server->oplocks) { 108 if (server->credits > 1) { 109 server->credits--; 110 server->oplock_credits++; 111 } 112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 114 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 115 change_conf(server); 116 117 scredits = *val; 118 in_flight = server->in_flight; 119 spin_unlock(&server->req_lock); 120 wake_up(&server->request_q); 121 122 if (reconnect_detected) { 123 trace_smb3_reconnect_detected(server->CurrentMid, 124 server->conn_id, server->hostname, scredits, add, in_flight); 125 126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 127 add, instance); 128 } 129 130 if (reconnect_with_invalid_credits) { 131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 132 server->conn_id, server->hostname, scredits, add, in_flight); 133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 134 optype, scredits, add); 135 } 136 137 spin_lock(&server->srv_lock); 138 if (server->tcpStatus == CifsNeedReconnect 139 || server->tcpStatus == CifsExiting) { 140 spin_unlock(&server->srv_lock); 141 return; 142 } 143 spin_unlock(&server->srv_lock); 144 145 switch (rc) { 146 case -1: 147 /* change_conf hasn't been executed */ 148 break; 149 case 0: 150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 151 break; 152 case 1: 153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 154 break; 155 case 2: 156 cifs_dbg(FYI, "disabling oplocks\n"); 157 break; 158 default: 159 /* change_conf rebalanced credits for different types */ 160 break; 161 } 162 163 trace_smb3_add_credits(server->CurrentMid, 164 server->conn_id, server->hostname, scredits, add, in_flight); 165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 166 } 167 168 static void 169 smb2_set_credits(struct TCP_Server_Info *server, const int val) 170 { 171 int scredits, in_flight; 172 173 spin_lock(&server->req_lock); 174 server->credits = val; 175 if (val == 1) { 176 server->reconnect_instance++; 177 /* 178 * ChannelSequence updated for all channels in primary channel so that consistent 179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 180 */ 181 if (SERVER_IS_CHAN(server)) 182 server->primary_server->channel_sequence_num++; 183 else 184 server->channel_sequence_num++; 185 } 186 scredits = server->credits; 187 in_flight = server->in_flight; 188 spin_unlock(&server->req_lock); 189 190 trace_smb3_set_credits(server->CurrentMid, 191 server->conn_id, server->hostname, scredits, val, in_flight); 192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 193 194 /* don't log while holding the lock */ 195 if (val == 1) 196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 197 } 198 199 static int * 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 201 { 202 switch (optype) { 203 case CIFS_ECHO_OP: 204 return &server->echo_credits; 205 case CIFS_OBREAK_OP: 206 return &server->oplock_credits; 207 default: 208 return &server->credits; 209 } 210 } 211 212 static unsigned int 213 smb2_get_credits(struct mid_q_entry *mid) 214 { 215 return mid->credits_received; 216 } 217 218 static int 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 220 unsigned int *num, struct cifs_credits *credits) 221 { 222 int rc = 0; 223 unsigned int scredits, in_flight; 224 225 spin_lock(&server->req_lock); 226 while (1) { 227 spin_unlock(&server->req_lock); 228 229 spin_lock(&server->srv_lock); 230 if (server->tcpStatus == CifsExiting) { 231 spin_unlock(&server->srv_lock); 232 return -ENOENT; 233 } 234 spin_unlock(&server->srv_lock); 235 236 spin_lock(&server->req_lock); 237 if (server->credits <= 0) { 238 spin_unlock(&server->req_lock); 239 cifs_num_waiters_inc(server); 240 rc = wait_event_killable(server->request_q, 241 has_credits(server, &server->credits, 1)); 242 cifs_num_waiters_dec(server); 243 if (rc) 244 return rc; 245 spin_lock(&server->req_lock); 246 } else { 247 scredits = server->credits; 248 /* can deadlock with reopen */ 249 if (scredits <= 8) { 250 *num = SMB2_MAX_BUFFER_SIZE; 251 credits->value = 0; 252 credits->instance = 0; 253 break; 254 } 255 256 /* leave some credits for reopen and other ops */ 257 scredits -= 8; 258 *num = min_t(unsigned int, size, 259 scredits * SMB2_MAX_BUFFER_SIZE); 260 261 credits->value = 262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 263 credits->instance = server->reconnect_instance; 264 server->credits -= credits->value; 265 server->in_flight++; 266 if (server->in_flight > server->max_in_flight) 267 server->max_in_flight = server->in_flight; 268 break; 269 } 270 } 271 scredits = server->credits; 272 in_flight = server->in_flight; 273 spin_unlock(&server->req_lock); 274 275 trace_smb3_wait_credits(server->CurrentMid, 276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 278 __func__, credits->value, scredits); 279 280 return rc; 281 } 282 283 static int 284 smb2_adjust_credits(struct TCP_Server_Info *server, 285 struct cifs_credits *credits, 286 const unsigned int payload_size) 287 { 288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 289 int scredits, in_flight; 290 291 if (!credits->value || credits->value == new_val) 292 return 0; 293 294 if (credits->value < new_val) { 295 trace_smb3_too_many_credits(server->CurrentMid, 296 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 298 credits->value, new_val); 299 300 return -EOPNOTSUPP; 301 } 302 303 spin_lock(&server->req_lock); 304 305 if (server->reconnect_instance != credits->instance) { 306 scredits = server->credits; 307 in_flight = server->in_flight; 308 spin_unlock(&server->req_lock); 309 310 trace_smb3_reconnect_detected(server->CurrentMid, 311 server->conn_id, server->hostname, scredits, 312 credits->value - new_val, in_flight); 313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 314 credits->value - new_val); 315 return -EAGAIN; 316 } 317 318 server->credits += credits->value - new_val; 319 scredits = server->credits; 320 in_flight = server->in_flight; 321 spin_unlock(&server->req_lock); 322 wake_up(&server->request_q); 323 324 trace_smb3_adj_credits(server->CurrentMid, 325 server->conn_id, server->hostname, scredits, 326 credits->value - new_val, in_flight); 327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 328 __func__, credits->value - new_val, scredits); 329 330 credits->value = new_val; 331 332 return 0; 333 } 334 335 static __u64 336 smb2_get_next_mid(struct TCP_Server_Info *server) 337 { 338 __u64 mid; 339 /* for SMB2 we need the current value */ 340 spin_lock(&server->mid_lock); 341 mid = server->CurrentMid++; 342 spin_unlock(&server->mid_lock); 343 return mid; 344 } 345 346 static void 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 348 { 349 spin_lock(&server->mid_lock); 350 if (server->CurrentMid >= val) 351 server->CurrentMid -= val; 352 spin_unlock(&server->mid_lock); 353 } 354 355 static struct mid_q_entry * 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 357 { 358 struct mid_q_entry *mid; 359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 360 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 361 362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 364 return NULL; 365 } 366 367 spin_lock(&server->mid_lock); 368 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 369 if ((mid->mid == wire_mid) && 370 (mid->mid_state == MID_REQUEST_SUBMITTED) && 371 (mid->command == shdr->Command)) { 372 kref_get(&mid->refcount); 373 if (dequeue) { 374 list_del_init(&mid->qhead); 375 mid->mid_flags |= MID_DELETED; 376 } 377 spin_unlock(&server->mid_lock); 378 return mid; 379 } 380 } 381 spin_unlock(&server->mid_lock); 382 return NULL; 383 } 384 385 static struct mid_q_entry * 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 387 { 388 return __smb2_find_mid(server, buf, false); 389 } 390 391 static struct mid_q_entry * 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 393 { 394 return __smb2_find_mid(server, buf, true); 395 } 396 397 static void 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 399 { 400 #ifdef CONFIG_CIFS_DEBUG2 401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 402 403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 405 shdr->Id.SyncId.ProcessId); 406 if (!server->ops->check_message(buf, server->total_read, server)) { 407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 408 server->ops->calc_smb_size(buf)); 409 } 410 #endif 411 } 412 413 static bool 414 smb2_need_neg(struct TCP_Server_Info *server) 415 { 416 return server->max_read == 0; 417 } 418 419 static int 420 smb2_negotiate(const unsigned int xid, 421 struct cifs_ses *ses, 422 struct TCP_Server_Info *server) 423 { 424 int rc; 425 426 spin_lock(&server->mid_lock); 427 server->CurrentMid = 0; 428 spin_unlock(&server->mid_lock); 429 rc = SMB2_negotiate(xid, ses, server); 430 /* BB we probably don't need to retry with modern servers */ 431 if (rc == -EAGAIN) 432 rc = -EHOSTDOWN; 433 return rc; 434 } 435 436 static unsigned int 437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 438 { 439 struct TCP_Server_Info *server = tcon->ses->server; 440 unsigned int wsize; 441 442 /* start with specified wsize, or default */ 443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 444 wsize = min_t(unsigned int, wsize, server->max_write); 445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 447 448 return wsize; 449 } 450 451 static unsigned int 452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 453 { 454 struct TCP_Server_Info *server = tcon->ses->server; 455 unsigned int wsize; 456 457 /* start with specified wsize, or default */ 458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 459 wsize = min_t(unsigned int, wsize, server->max_write); 460 #ifdef CONFIG_CIFS_SMB_DIRECT 461 if (server->rdma) { 462 if (server->sign) 463 /* 464 * Account for SMB2 data transfer packet header and 465 * possible encryption header 466 */ 467 wsize = min_t(unsigned int, 468 wsize, 469 server->smbd_conn->max_fragmented_send_size - 470 SMB2_READWRITE_PDU_HEADER_SIZE - 471 sizeof(struct smb2_transform_hdr)); 472 else 473 wsize = min_t(unsigned int, 474 wsize, server->smbd_conn->max_readwrite_size); 475 } 476 #endif 477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 479 480 return wsize; 481 } 482 483 static unsigned int 484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 485 { 486 struct TCP_Server_Info *server = tcon->ses->server; 487 unsigned int rsize; 488 489 /* start with specified rsize, or default */ 490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 491 rsize = min_t(unsigned int, rsize, server->max_read); 492 493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 495 496 return rsize; 497 } 498 499 static unsigned int 500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 501 { 502 struct TCP_Server_Info *server = tcon->ses->server; 503 unsigned int rsize; 504 505 /* start with specified rsize, or default */ 506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 507 rsize = min_t(unsigned int, rsize, server->max_read); 508 #ifdef CONFIG_CIFS_SMB_DIRECT 509 if (server->rdma) { 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 rsize = min_t(unsigned int, 516 rsize, 517 server->smbd_conn->max_fragmented_recv_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 rsize = min_t(unsigned int, 522 rsize, server->smbd_conn->max_readwrite_size); 523 } 524 #endif 525 526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 528 529 return rsize; 530 } 531 532 /* 533 * compare two interfaces a and b 534 * return 0 if everything matches. 535 * return 1 if a is rdma capable, or rss capable, or has higher link speed 536 * return -1 otherwise. 537 */ 538 static int 539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 540 { 541 int cmp_ret = 0; 542 543 WARN_ON(!a || !b); 544 if (a->rdma_capable == b->rdma_capable) { 545 if (a->rss_capable == b->rss_capable) { 546 if (a->speed == b->speed) { 547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 548 (struct sockaddr *) &b->sockaddr); 549 if (!cmp_ret) 550 return 0; 551 else if (cmp_ret > 0) 552 return 1; 553 else 554 return -1; 555 } else if (a->speed > b->speed) 556 return 1; 557 else 558 return -1; 559 } else if (a->rss_capable > b->rss_capable) 560 return 1; 561 else 562 return -1; 563 } else if (a->rdma_capable > b->rdma_capable) 564 return 1; 565 else 566 return -1; 567 } 568 569 static int 570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 571 size_t buf_len, struct cifs_ses *ses, bool in_mount) 572 { 573 struct network_interface_info_ioctl_rsp *p; 574 struct sockaddr_in *addr4; 575 struct sockaddr_in6 *addr6; 576 struct iface_info_ipv4 *p4; 577 struct iface_info_ipv6 *p6; 578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 579 struct cifs_server_iface tmp_iface; 580 ssize_t bytes_left; 581 size_t next = 0; 582 int nb_iface = 0; 583 int rc = 0, ret = 0; 584 585 bytes_left = buf_len; 586 p = buf; 587 588 spin_lock(&ses->iface_lock); 589 /* do not query too frequently, this time with lock held */ 590 if (ses->iface_last_update && 591 time_before(jiffies, ses->iface_last_update + 592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 593 spin_unlock(&ses->iface_lock); 594 return 0; 595 } 596 597 /* 598 * Go through iface_list and mark them as inactive 599 */ 600 list_for_each_entry_safe(iface, niface, &ses->iface_list, 601 iface_head) 602 iface->is_active = 0; 603 604 spin_unlock(&ses->iface_lock); 605 606 /* 607 * Samba server e.g. can return an empty interface list in some cases, 608 * which would only be a problem if we were requesting multichannel 609 */ 610 if (bytes_left == 0) { 611 /* avoid spamming logs every 10 minutes, so log only in mount */ 612 if ((ses->chan_max > 1) && in_mount) 613 cifs_dbg(VFS, 614 "multichannel not available\n" 615 "Empty network interface list returned by server %s\n", 616 ses->server->hostname); 617 rc = -EOPNOTSUPP; 618 ses->iface_last_update = jiffies; 619 goto out; 620 } 621 622 while (bytes_left >= (ssize_t)sizeof(*p)) { 623 memset(&tmp_iface, 0, sizeof(tmp_iface)); 624 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 625 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 626 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 627 628 switch (p->Family) { 629 /* 630 * The kernel and wire socket structures have the same 631 * layout and use network byte order but make the 632 * conversion explicit in case either one changes. 633 */ 634 case INTERNETWORK: 635 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 636 p4 = (struct iface_info_ipv4 *)p->Buffer; 637 addr4->sin_family = AF_INET; 638 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 639 640 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 641 addr4->sin_port = cpu_to_be16(CIFS_PORT); 642 643 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 644 &addr4->sin_addr); 645 break; 646 case INTERNETWORKV6: 647 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 648 p6 = (struct iface_info_ipv6 *)p->Buffer; 649 addr6->sin6_family = AF_INET6; 650 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 651 652 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 653 addr6->sin6_flowinfo = 0; 654 addr6->sin6_scope_id = 0; 655 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 656 657 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 658 &addr6->sin6_addr); 659 break; 660 default: 661 cifs_dbg(VFS, 662 "%s: skipping unsupported socket family\n", 663 __func__); 664 goto next_iface; 665 } 666 667 /* 668 * The iface_list is assumed to be sorted by speed. 669 * Check if the new interface exists in that list. 670 * NEVER change iface. it could be in use. 671 * Add a new one instead 672 */ 673 spin_lock(&ses->iface_lock); 674 list_for_each_entry_safe(iface, niface, &ses->iface_list, 675 iface_head) { 676 ret = iface_cmp(iface, &tmp_iface); 677 if (!ret) { 678 iface->is_active = 1; 679 spin_unlock(&ses->iface_lock); 680 goto next_iface; 681 } else if (ret < 0) { 682 /* all remaining ifaces are slower */ 683 kref_get(&iface->refcount); 684 break; 685 } 686 } 687 spin_unlock(&ses->iface_lock); 688 689 /* no match. insert the entry in the list */ 690 info = kmalloc(sizeof(struct cifs_server_iface), 691 GFP_KERNEL); 692 if (!info) { 693 rc = -ENOMEM; 694 goto out; 695 } 696 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 697 698 /* add this new entry to the list */ 699 kref_init(&info->refcount); 700 info->is_active = 1; 701 702 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 703 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 704 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 705 le32_to_cpu(p->Capability)); 706 707 spin_lock(&ses->iface_lock); 708 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 709 list_add_tail(&info->iface_head, &iface->iface_head); 710 kref_put(&iface->refcount, release_iface); 711 } else 712 list_add_tail(&info->iface_head, &ses->iface_list); 713 714 ses->iface_count++; 715 spin_unlock(&ses->iface_lock); 716 next_iface: 717 nb_iface++; 718 next = le32_to_cpu(p->Next); 719 if (!next) { 720 bytes_left -= sizeof(*p); 721 break; 722 } 723 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 724 bytes_left -= next; 725 } 726 727 if (!nb_iface) { 728 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 729 rc = -EINVAL; 730 goto out; 731 } 732 733 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 734 if ((bytes_left > 8) || p->Next) 735 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 736 737 ses->iface_last_update = jiffies; 738 739 out: 740 /* 741 * Go through the list again and put the inactive entries 742 */ 743 spin_lock(&ses->iface_lock); 744 list_for_each_entry_safe(iface, niface, &ses->iface_list, 745 iface_head) { 746 if (!iface->is_active) { 747 list_del(&iface->iface_head); 748 kref_put(&iface->refcount, release_iface); 749 ses->iface_count--; 750 } 751 } 752 spin_unlock(&ses->iface_lock); 753 754 return rc; 755 } 756 757 int 758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 759 { 760 int rc; 761 unsigned int ret_data_len = 0; 762 struct network_interface_info_ioctl_rsp *out_buf = NULL; 763 struct cifs_ses *ses = tcon->ses; 764 struct TCP_Server_Info *pserver; 765 766 /* do not query too frequently */ 767 if (ses->iface_last_update && 768 time_before(jiffies, ses->iface_last_update + 769 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 770 return 0; 771 772 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 773 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 774 NULL /* no data input */, 0 /* no data input */, 775 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 776 if (rc == -EOPNOTSUPP) { 777 cifs_dbg(FYI, 778 "server does not support query network interfaces\n"); 779 ret_data_len = 0; 780 } else if (rc != 0) { 781 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 782 goto out; 783 } 784 785 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 786 if (rc) 787 goto out; 788 789 /* check if iface is still active */ 790 spin_lock(&ses->chan_lock); 791 pserver = ses->chans[0].server; 792 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 793 spin_unlock(&ses->chan_lock); 794 cifs_chan_update_iface(ses, pserver); 795 spin_lock(&ses->chan_lock); 796 } 797 spin_unlock(&ses->chan_lock); 798 799 out: 800 kfree(out_buf); 801 return rc; 802 } 803 804 static void 805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 806 struct cifs_sb_info *cifs_sb) 807 { 808 int rc; 809 __le16 srch_path = 0; /* Null - open root of share */ 810 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 811 struct cifs_open_parms oparms; 812 struct cifs_fid fid; 813 struct cached_fid *cfid = NULL; 814 815 oparms = (struct cifs_open_parms) { 816 .tcon = tcon, 817 .path = "", 818 .desired_access = FILE_READ_ATTRIBUTES, 819 .disposition = FILE_OPEN, 820 .create_options = cifs_create_options(cifs_sb, 0), 821 .fid = &fid, 822 }; 823 824 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 825 if (rc == 0) 826 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 827 else 828 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 829 NULL, NULL); 830 if (rc) 831 return; 832 833 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 834 835 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 836 FS_ATTRIBUTE_INFORMATION); 837 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 838 FS_DEVICE_INFORMATION); 839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 840 FS_VOLUME_INFORMATION); 841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 842 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 843 if (cfid == NULL) 844 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 845 else 846 close_cached_dir(cfid); 847 } 848 849 static void 850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 851 struct cifs_sb_info *cifs_sb) 852 { 853 int rc; 854 __le16 srch_path = 0; /* Null - open root of share */ 855 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 856 struct cifs_open_parms oparms; 857 struct cifs_fid fid; 858 859 oparms = (struct cifs_open_parms) { 860 .tcon = tcon, 861 .path = "", 862 .desired_access = FILE_READ_ATTRIBUTES, 863 .disposition = FILE_OPEN, 864 .create_options = cifs_create_options(cifs_sb, 0), 865 .fid = &fid, 866 }; 867 868 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 869 NULL, NULL); 870 if (rc) 871 return; 872 873 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 874 FS_ATTRIBUTE_INFORMATION); 875 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 876 FS_DEVICE_INFORMATION); 877 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 878 } 879 880 static int 881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 882 struct cifs_sb_info *cifs_sb, const char *full_path) 883 { 884 __le16 *utf16_path; 885 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 886 int err_buftype = CIFS_NO_BUFFER; 887 struct cifs_open_parms oparms; 888 struct kvec err_iov = {}; 889 struct cifs_fid fid; 890 struct cached_fid *cfid; 891 bool islink; 892 int rc, rc2; 893 894 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 895 if (!rc) { 896 if (cfid->has_lease) { 897 close_cached_dir(cfid); 898 return 0; 899 } 900 close_cached_dir(cfid); 901 } 902 903 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 904 if (!utf16_path) 905 return -ENOMEM; 906 907 oparms = (struct cifs_open_parms) { 908 .tcon = tcon, 909 .path = full_path, 910 .desired_access = FILE_READ_ATTRIBUTES, 911 .disposition = FILE_OPEN, 912 .create_options = cifs_create_options(cifs_sb, 0), 913 .fid = &fid, 914 }; 915 916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 917 &err_iov, &err_buftype); 918 if (rc) { 919 struct smb2_hdr *hdr = err_iov.iov_base; 920 921 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 922 goto out; 923 924 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 925 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 926 full_path, &islink); 927 if (rc2) { 928 rc = rc2; 929 goto out; 930 } 931 if (islink) 932 rc = -EREMOTE; 933 } 934 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 935 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 936 rc = -EOPNOTSUPP; 937 goto out; 938 } 939 940 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 941 942 out: 943 free_rsp_buf(err_buftype, err_iov.iov_base); 944 kfree(utf16_path); 945 return rc; 946 } 947 948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 949 struct cifs_sb_info *cifs_sb, const char *full_path, 950 u64 *uniqueid, struct cifs_open_info_data *data) 951 { 952 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 953 return 0; 954 } 955 956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 957 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 958 { 959 struct cifs_fid *fid = &cfile->fid; 960 961 if (cfile->symlink_target) { 962 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 963 if (!data->symlink_target) 964 return -ENOMEM; 965 } 966 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 967 } 968 969 #ifdef CONFIG_CIFS_XATTR 970 static ssize_t 971 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 972 struct smb2_file_full_ea_info *src, size_t src_size, 973 const unsigned char *ea_name) 974 { 975 int rc = 0; 976 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 977 char *name, *value; 978 size_t buf_size = dst_size; 979 size_t name_len, value_len, user_name_len; 980 981 while (src_size > 0) { 982 name_len = (size_t)src->ea_name_length; 983 value_len = (size_t)le16_to_cpu(src->ea_value_length); 984 985 if (name_len == 0) 986 break; 987 988 if (src_size < 8 + name_len + 1 + value_len) { 989 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 990 rc = -EIO; 991 goto out; 992 } 993 994 name = &src->ea_data[0]; 995 value = &src->ea_data[src->ea_name_length + 1]; 996 997 if (ea_name) { 998 if (ea_name_len == name_len && 999 memcmp(ea_name, name, name_len) == 0) { 1000 rc = value_len; 1001 if (dst_size == 0) 1002 goto out; 1003 if (dst_size < value_len) { 1004 rc = -ERANGE; 1005 goto out; 1006 } 1007 memcpy(dst, value, value_len); 1008 goto out; 1009 } 1010 } else { 1011 /* 'user.' plus a terminating null */ 1012 user_name_len = 5 + 1 + name_len; 1013 1014 if (buf_size == 0) { 1015 /* skip copy - calc size only */ 1016 rc += user_name_len; 1017 } else if (dst_size >= user_name_len) { 1018 dst_size -= user_name_len; 1019 memcpy(dst, "user.", 5); 1020 dst += 5; 1021 memcpy(dst, src->ea_data, name_len); 1022 dst += name_len; 1023 *dst = 0; 1024 ++dst; 1025 rc += user_name_len; 1026 } else { 1027 /* stop before overrun buffer */ 1028 rc = -ERANGE; 1029 break; 1030 } 1031 } 1032 1033 if (!src->next_entry_offset) 1034 break; 1035 1036 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1037 /* stop before overrun buffer */ 1038 rc = -ERANGE; 1039 break; 1040 } 1041 src_size -= le32_to_cpu(src->next_entry_offset); 1042 src = (void *)((char *)src + 1043 le32_to_cpu(src->next_entry_offset)); 1044 } 1045 1046 /* didn't find the named attribute */ 1047 if (ea_name) 1048 rc = -ENODATA; 1049 1050 out: 1051 return (ssize_t)rc; 1052 } 1053 1054 static ssize_t 1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1056 const unsigned char *path, const unsigned char *ea_name, 1057 char *ea_data, size_t buf_size, 1058 struct cifs_sb_info *cifs_sb) 1059 { 1060 int rc; 1061 struct kvec rsp_iov = {NULL, 0}; 1062 int buftype = CIFS_NO_BUFFER; 1063 struct smb2_query_info_rsp *rsp; 1064 struct smb2_file_full_ea_info *info = NULL; 1065 1066 rc = smb2_query_info_compound(xid, tcon, path, 1067 FILE_READ_EA, 1068 FILE_FULL_EA_INFORMATION, 1069 SMB2_O_INFO_FILE, 1070 CIFSMaxBufSize - 1071 MAX_SMB2_CREATE_RESPONSE_SIZE - 1072 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1073 &rsp_iov, &buftype, cifs_sb); 1074 if (rc) { 1075 /* 1076 * If ea_name is NULL (listxattr) and there are no EAs, 1077 * return 0 as it's not an error. Otherwise, the specified 1078 * ea_name was not found. 1079 */ 1080 if (!ea_name && rc == -ENODATA) 1081 rc = 0; 1082 goto qeas_exit; 1083 } 1084 1085 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1086 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1087 le32_to_cpu(rsp->OutputBufferLength), 1088 &rsp_iov, 1089 sizeof(struct smb2_file_full_ea_info)); 1090 if (rc) 1091 goto qeas_exit; 1092 1093 info = (struct smb2_file_full_ea_info *)( 1094 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1095 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1096 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1097 1098 qeas_exit: 1099 free_rsp_buf(buftype, rsp_iov.iov_base); 1100 return rc; 1101 } 1102 1103 static int 1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1105 const char *path, const char *ea_name, const void *ea_value, 1106 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1107 struct cifs_sb_info *cifs_sb) 1108 { 1109 struct smb2_compound_vars *vars; 1110 struct cifs_ses *ses = tcon->ses; 1111 struct TCP_Server_Info *server; 1112 struct smb_rqst *rqst; 1113 struct kvec *rsp_iov; 1114 __le16 *utf16_path = NULL; 1115 int ea_name_len = strlen(ea_name); 1116 int flags = CIFS_CP_CREATE_CLOSE_OP; 1117 int len; 1118 int resp_buftype[3]; 1119 struct cifs_open_parms oparms; 1120 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1121 struct cifs_fid fid; 1122 unsigned int size[1]; 1123 void *data[1]; 1124 struct smb2_file_full_ea_info *ea = NULL; 1125 struct smb2_query_info_rsp *rsp; 1126 int rc, used_len = 0; 1127 int retries = 0, cur_sleep = 1; 1128 1129 replay_again: 1130 /* reinitialize for possible replay */ 1131 flags = CIFS_CP_CREATE_CLOSE_OP; 1132 oplock = SMB2_OPLOCK_LEVEL_NONE; 1133 server = cifs_pick_channel(ses); 1134 1135 if (smb3_encryption_required(tcon)) 1136 flags |= CIFS_TRANSFORM_REQ; 1137 1138 if (ea_name_len > 255) 1139 return -EINVAL; 1140 1141 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1142 if (!utf16_path) 1143 return -ENOMEM; 1144 1145 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1146 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1147 if (!vars) { 1148 rc = -ENOMEM; 1149 goto out_free_path; 1150 } 1151 rqst = vars->rqst; 1152 rsp_iov = vars->rsp_iov; 1153 1154 if (ses->server->ops->query_all_EAs) { 1155 if (!ea_value) { 1156 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1157 ea_name, NULL, 0, 1158 cifs_sb); 1159 if (rc == -ENODATA) 1160 goto sea_exit; 1161 } else { 1162 /* If we are adding a attribute we should first check 1163 * if there will be enough space available to store 1164 * the new EA. If not we should not add it since we 1165 * would not be able to even read the EAs back. 1166 */ 1167 rc = smb2_query_info_compound(xid, tcon, path, 1168 FILE_READ_EA, 1169 FILE_FULL_EA_INFORMATION, 1170 SMB2_O_INFO_FILE, 1171 CIFSMaxBufSize - 1172 MAX_SMB2_CREATE_RESPONSE_SIZE - 1173 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1174 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1175 if (rc == 0) { 1176 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1177 used_len = le32_to_cpu(rsp->OutputBufferLength); 1178 } 1179 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1180 resp_buftype[1] = CIFS_NO_BUFFER; 1181 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1182 rc = 0; 1183 1184 /* Use a fudge factor of 256 bytes in case we collide 1185 * with a different set_EAs command. 1186 */ 1187 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1188 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1189 used_len + ea_name_len + ea_value_len + 1) { 1190 rc = -ENOSPC; 1191 goto sea_exit; 1192 } 1193 } 1194 } 1195 1196 /* Open */ 1197 rqst[0].rq_iov = vars->open_iov; 1198 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1199 1200 oparms = (struct cifs_open_parms) { 1201 .tcon = tcon, 1202 .path = path, 1203 .desired_access = FILE_WRITE_EA, 1204 .disposition = FILE_OPEN, 1205 .create_options = cifs_create_options(cifs_sb, 0), 1206 .fid = &fid, 1207 .replay = !!(retries), 1208 }; 1209 1210 rc = SMB2_open_init(tcon, server, 1211 &rqst[0], &oplock, &oparms, utf16_path); 1212 if (rc) 1213 goto sea_exit; 1214 smb2_set_next_command(tcon, &rqst[0]); 1215 1216 1217 /* Set Info */ 1218 rqst[1].rq_iov = vars->si_iov; 1219 rqst[1].rq_nvec = 1; 1220 1221 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1222 ea = kzalloc(len, GFP_KERNEL); 1223 if (ea == NULL) { 1224 rc = -ENOMEM; 1225 goto sea_exit; 1226 } 1227 1228 ea->ea_name_length = ea_name_len; 1229 ea->ea_value_length = cpu_to_le16(ea_value_len); 1230 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1231 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1232 1233 size[0] = len; 1234 data[0] = ea; 1235 1236 rc = SMB2_set_info_init(tcon, server, 1237 &rqst[1], COMPOUND_FID, 1238 COMPOUND_FID, current->tgid, 1239 FILE_FULL_EA_INFORMATION, 1240 SMB2_O_INFO_FILE, 0, data, size); 1241 if (rc) 1242 goto sea_exit; 1243 smb2_set_next_command(tcon, &rqst[1]); 1244 smb2_set_related(&rqst[1]); 1245 1246 /* Close */ 1247 rqst[2].rq_iov = &vars->close_iov; 1248 rqst[2].rq_nvec = 1; 1249 rc = SMB2_close_init(tcon, server, 1250 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1251 if (rc) 1252 goto sea_exit; 1253 smb2_set_related(&rqst[2]); 1254 1255 if (retries) { 1256 smb2_set_replay(server, &rqst[0]); 1257 smb2_set_replay(server, &rqst[1]); 1258 smb2_set_replay(server, &rqst[2]); 1259 } 1260 1261 rc = compound_send_recv(xid, ses, server, 1262 flags, 3, rqst, 1263 resp_buftype, rsp_iov); 1264 /* no need to bump num_remote_opens because handle immediately closed */ 1265 1266 sea_exit: 1267 kfree(ea); 1268 SMB2_open_free(&rqst[0]); 1269 SMB2_set_info_free(&rqst[1]); 1270 SMB2_close_free(&rqst[2]); 1271 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1272 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1273 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1274 kfree(vars); 1275 out_free_path: 1276 kfree(utf16_path); 1277 1278 if (is_replayable_error(rc) && 1279 smb2_should_replay(tcon, &retries, &cur_sleep)) 1280 goto replay_again; 1281 1282 return rc; 1283 } 1284 #endif 1285 1286 static bool 1287 smb2_can_echo(struct TCP_Server_Info *server) 1288 { 1289 return server->echoes; 1290 } 1291 1292 static void 1293 smb2_clear_stats(struct cifs_tcon *tcon) 1294 { 1295 int i; 1296 1297 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1298 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1299 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1300 } 1301 } 1302 1303 static void 1304 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1305 { 1306 seq_puts(m, "\n\tShare Capabilities:"); 1307 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1308 seq_puts(m, " DFS,"); 1309 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1310 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1311 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1312 seq_puts(m, " SCALEOUT,"); 1313 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1314 seq_puts(m, " CLUSTER,"); 1315 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1316 seq_puts(m, " ASYMMETRIC,"); 1317 if (tcon->capabilities == 0) 1318 seq_puts(m, " None"); 1319 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1320 seq_puts(m, " Aligned,"); 1321 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1322 seq_puts(m, " Partition Aligned,"); 1323 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1324 seq_puts(m, " SSD,"); 1325 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1326 seq_puts(m, " TRIM-support,"); 1327 1328 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1329 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1330 if (tcon->perf_sector_size) 1331 seq_printf(m, "\tOptimal sector size: 0x%x", 1332 tcon->perf_sector_size); 1333 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1334 } 1335 1336 static void 1337 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1338 { 1339 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1340 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1341 1342 /* 1343 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1344 * totals (requests sent) since those SMBs are per-session not per tcon 1345 */ 1346 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1347 (long long)(tcon->bytes_read), 1348 (long long)(tcon->bytes_written)); 1349 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1350 atomic_read(&tcon->num_local_opens), 1351 atomic_read(&tcon->num_remote_opens)); 1352 seq_printf(m, "\nTreeConnects: %d total %d failed", 1353 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1354 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1355 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1356 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1357 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1358 seq_printf(m, "\nCreates: %d total %d failed", 1359 atomic_read(&sent[SMB2_CREATE_HE]), 1360 atomic_read(&failed[SMB2_CREATE_HE])); 1361 seq_printf(m, "\nCloses: %d total %d failed", 1362 atomic_read(&sent[SMB2_CLOSE_HE]), 1363 atomic_read(&failed[SMB2_CLOSE_HE])); 1364 seq_printf(m, "\nFlushes: %d total %d failed", 1365 atomic_read(&sent[SMB2_FLUSH_HE]), 1366 atomic_read(&failed[SMB2_FLUSH_HE])); 1367 seq_printf(m, "\nReads: %d total %d failed", 1368 atomic_read(&sent[SMB2_READ_HE]), 1369 atomic_read(&failed[SMB2_READ_HE])); 1370 seq_printf(m, "\nWrites: %d total %d failed", 1371 atomic_read(&sent[SMB2_WRITE_HE]), 1372 atomic_read(&failed[SMB2_WRITE_HE])); 1373 seq_printf(m, "\nLocks: %d total %d failed", 1374 atomic_read(&sent[SMB2_LOCK_HE]), 1375 atomic_read(&failed[SMB2_LOCK_HE])); 1376 seq_printf(m, "\nIOCTLs: %d total %d failed", 1377 atomic_read(&sent[SMB2_IOCTL_HE]), 1378 atomic_read(&failed[SMB2_IOCTL_HE])); 1379 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1380 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1381 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1382 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1383 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1384 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1385 seq_printf(m, "\nQueryInfos: %d total %d failed", 1386 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1387 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1388 seq_printf(m, "\nSetInfos: %d total %d failed", 1389 atomic_read(&sent[SMB2_SET_INFO_HE]), 1390 atomic_read(&failed[SMB2_SET_INFO_HE])); 1391 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1392 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1393 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1394 } 1395 1396 static void 1397 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1398 { 1399 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1400 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1401 1402 cfile->fid.persistent_fid = fid->persistent_fid; 1403 cfile->fid.volatile_fid = fid->volatile_fid; 1404 cfile->fid.access = fid->access; 1405 #ifdef CONFIG_CIFS_DEBUG2 1406 cfile->fid.mid = fid->mid; 1407 #endif /* CIFS_DEBUG2 */ 1408 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1409 &fid->purge_cache); 1410 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1411 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1412 } 1413 1414 static void 1415 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1416 struct cifs_fid *fid) 1417 { 1418 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1419 } 1420 1421 static void 1422 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1423 struct cifsFileInfo *cfile) 1424 { 1425 struct smb2_file_network_open_info file_inf; 1426 struct inode *inode; 1427 int rc; 1428 1429 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1430 cfile->fid.volatile_fid, &file_inf); 1431 if (rc) 1432 return; 1433 1434 inode = d_inode(cfile->dentry); 1435 1436 spin_lock(&inode->i_lock); 1437 CIFS_I(inode)->time = jiffies; 1438 1439 /* Creation time should not need to be updated on close */ 1440 if (file_inf.LastWriteTime) 1441 inode_set_mtime_to_ts(inode, 1442 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1443 if (file_inf.ChangeTime) 1444 inode_set_ctime_to_ts(inode, 1445 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1446 if (file_inf.LastAccessTime) 1447 inode_set_atime_to_ts(inode, 1448 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1449 1450 /* 1451 * i_blocks is not related to (i_size / i_blksize), 1452 * but instead 512 byte (2**9) size is required for 1453 * calculating num blocks. 1454 */ 1455 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1456 inode->i_blocks = 1457 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1458 1459 /* End of file and Attributes should not have to be updated on close */ 1460 spin_unlock(&inode->i_lock); 1461 } 1462 1463 static int 1464 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1465 u64 persistent_fid, u64 volatile_fid, 1466 struct copychunk_ioctl *pcchunk) 1467 { 1468 int rc; 1469 unsigned int ret_data_len; 1470 struct resume_key_req *res_key; 1471 1472 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1473 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1474 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1475 1476 if (rc == -EOPNOTSUPP) { 1477 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1478 goto req_res_key_exit; 1479 } else if (rc) { 1480 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1481 goto req_res_key_exit; 1482 } 1483 if (ret_data_len < sizeof(struct resume_key_req)) { 1484 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1485 rc = -EINVAL; 1486 goto req_res_key_exit; 1487 } 1488 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1489 1490 req_res_key_exit: 1491 kfree(res_key); 1492 return rc; 1493 } 1494 1495 static int 1496 smb2_ioctl_query_info(const unsigned int xid, 1497 struct cifs_tcon *tcon, 1498 struct cifs_sb_info *cifs_sb, 1499 __le16 *path, int is_dir, 1500 unsigned long p) 1501 { 1502 struct smb2_compound_vars *vars; 1503 struct smb_rqst *rqst; 1504 struct kvec *rsp_iov; 1505 struct cifs_ses *ses = tcon->ses; 1506 struct TCP_Server_Info *server; 1507 char __user *arg = (char __user *)p; 1508 struct smb_query_info qi; 1509 struct smb_query_info __user *pqi; 1510 int rc = 0; 1511 int flags = CIFS_CP_CREATE_CLOSE_OP; 1512 struct smb2_query_info_rsp *qi_rsp = NULL; 1513 struct smb2_ioctl_rsp *io_rsp = NULL; 1514 void *buffer = NULL; 1515 int resp_buftype[3]; 1516 struct cifs_open_parms oparms; 1517 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1518 struct cifs_fid fid; 1519 unsigned int size[2]; 1520 void *data[2]; 1521 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1522 void (*free_req1_func)(struct smb_rqst *r); 1523 int retries = 0, cur_sleep = 1; 1524 1525 replay_again: 1526 /* reinitialize for possible replay */ 1527 flags = CIFS_CP_CREATE_CLOSE_OP; 1528 oplock = SMB2_OPLOCK_LEVEL_NONE; 1529 server = cifs_pick_channel(ses); 1530 1531 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1532 if (vars == NULL) 1533 return -ENOMEM; 1534 rqst = &vars->rqst[0]; 1535 rsp_iov = &vars->rsp_iov[0]; 1536 1537 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1538 1539 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1540 rc = -EFAULT; 1541 goto free_vars; 1542 } 1543 if (qi.output_buffer_length > 1024) { 1544 rc = -EINVAL; 1545 goto free_vars; 1546 } 1547 1548 if (!ses || !server) { 1549 rc = -EIO; 1550 goto free_vars; 1551 } 1552 1553 if (smb3_encryption_required(tcon)) 1554 flags |= CIFS_TRANSFORM_REQ; 1555 1556 if (qi.output_buffer_length) { 1557 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1558 if (IS_ERR(buffer)) { 1559 rc = PTR_ERR(buffer); 1560 goto free_vars; 1561 } 1562 } 1563 1564 /* Open */ 1565 rqst[0].rq_iov = &vars->open_iov[0]; 1566 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1567 1568 oparms = (struct cifs_open_parms) { 1569 .tcon = tcon, 1570 .disposition = FILE_OPEN, 1571 .create_options = cifs_create_options(cifs_sb, create_options), 1572 .fid = &fid, 1573 .replay = !!(retries), 1574 }; 1575 1576 if (qi.flags & PASSTHRU_FSCTL) { 1577 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1578 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1579 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1580 break; 1581 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1582 oparms.desired_access = GENERIC_ALL; 1583 break; 1584 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1585 oparms.desired_access = GENERIC_READ; 1586 break; 1587 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1588 oparms.desired_access = GENERIC_WRITE; 1589 break; 1590 } 1591 } else if (qi.flags & PASSTHRU_SET_INFO) { 1592 oparms.desired_access = GENERIC_WRITE; 1593 } else { 1594 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1595 } 1596 1597 rc = SMB2_open_init(tcon, server, 1598 &rqst[0], &oplock, &oparms, path); 1599 if (rc) 1600 goto free_output_buffer; 1601 smb2_set_next_command(tcon, &rqst[0]); 1602 1603 /* Query */ 1604 if (qi.flags & PASSTHRU_FSCTL) { 1605 /* Can eventually relax perm check since server enforces too */ 1606 if (!capable(CAP_SYS_ADMIN)) { 1607 rc = -EPERM; 1608 goto free_open_req; 1609 } 1610 rqst[1].rq_iov = &vars->io_iov[0]; 1611 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1612 1613 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1614 qi.info_type, buffer, qi.output_buffer_length, 1615 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1616 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1617 free_req1_func = SMB2_ioctl_free; 1618 } else if (qi.flags == PASSTHRU_SET_INFO) { 1619 /* Can eventually relax perm check since server enforces too */ 1620 if (!capable(CAP_SYS_ADMIN)) { 1621 rc = -EPERM; 1622 goto free_open_req; 1623 } 1624 if (qi.output_buffer_length < 8) { 1625 rc = -EINVAL; 1626 goto free_open_req; 1627 } 1628 rqst[1].rq_iov = vars->si_iov; 1629 rqst[1].rq_nvec = 1; 1630 1631 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1632 size[0] = 8; 1633 data[0] = buffer; 1634 1635 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1636 current->tgid, FILE_END_OF_FILE_INFORMATION, 1637 SMB2_O_INFO_FILE, 0, data, size); 1638 free_req1_func = SMB2_set_info_free; 1639 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1640 rqst[1].rq_iov = &vars->qi_iov; 1641 rqst[1].rq_nvec = 1; 1642 1643 rc = SMB2_query_info_init(tcon, server, 1644 &rqst[1], COMPOUND_FID, 1645 COMPOUND_FID, qi.file_info_class, 1646 qi.info_type, qi.additional_information, 1647 qi.input_buffer_length, 1648 qi.output_buffer_length, buffer); 1649 free_req1_func = SMB2_query_info_free; 1650 } else { /* unknown flags */ 1651 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1652 qi.flags); 1653 rc = -EINVAL; 1654 } 1655 1656 if (rc) 1657 goto free_open_req; 1658 smb2_set_next_command(tcon, &rqst[1]); 1659 smb2_set_related(&rqst[1]); 1660 1661 /* Close */ 1662 rqst[2].rq_iov = &vars->close_iov; 1663 rqst[2].rq_nvec = 1; 1664 1665 rc = SMB2_close_init(tcon, server, 1666 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1667 if (rc) 1668 goto free_req_1; 1669 smb2_set_related(&rqst[2]); 1670 1671 if (retries) { 1672 smb2_set_replay(server, &rqst[0]); 1673 smb2_set_replay(server, &rqst[1]); 1674 smb2_set_replay(server, &rqst[2]); 1675 } 1676 1677 rc = compound_send_recv(xid, ses, server, 1678 flags, 3, rqst, 1679 resp_buftype, rsp_iov); 1680 if (rc) 1681 goto out; 1682 1683 /* No need to bump num_remote_opens since handle immediately closed */ 1684 if (qi.flags & PASSTHRU_FSCTL) { 1685 pqi = (struct smb_query_info __user *)arg; 1686 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1687 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1688 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1689 if (qi.input_buffer_length > 0 && 1690 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1691 > rsp_iov[1].iov_len) { 1692 rc = -EFAULT; 1693 goto out; 1694 } 1695 1696 if (copy_to_user(&pqi->input_buffer_length, 1697 &qi.input_buffer_length, 1698 sizeof(qi.input_buffer_length))) { 1699 rc = -EFAULT; 1700 goto out; 1701 } 1702 1703 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1704 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1705 qi.input_buffer_length)) 1706 rc = -EFAULT; 1707 } else { 1708 pqi = (struct smb_query_info __user *)arg; 1709 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1710 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1711 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1712 if (copy_to_user(&pqi->input_buffer_length, 1713 &qi.input_buffer_length, 1714 sizeof(qi.input_buffer_length))) { 1715 rc = -EFAULT; 1716 goto out; 1717 } 1718 1719 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1720 qi.input_buffer_length)) 1721 rc = -EFAULT; 1722 } 1723 1724 out: 1725 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1726 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1727 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1728 SMB2_close_free(&rqst[2]); 1729 free_req_1: 1730 free_req1_func(&rqst[1]); 1731 free_open_req: 1732 SMB2_open_free(&rqst[0]); 1733 free_output_buffer: 1734 kfree(buffer); 1735 free_vars: 1736 kfree(vars); 1737 1738 if (is_replayable_error(rc) && 1739 smb2_should_replay(tcon, &retries, &cur_sleep)) 1740 goto replay_again; 1741 1742 return rc; 1743 } 1744 1745 static ssize_t 1746 smb2_copychunk_range(const unsigned int xid, 1747 struct cifsFileInfo *srcfile, 1748 struct cifsFileInfo *trgtfile, u64 src_off, 1749 u64 len, u64 dest_off) 1750 { 1751 int rc; 1752 unsigned int ret_data_len; 1753 struct copychunk_ioctl *pcchunk; 1754 struct copychunk_ioctl_rsp *retbuf = NULL; 1755 struct cifs_tcon *tcon; 1756 int chunks_copied = 0; 1757 bool chunk_sizes_updated = false; 1758 ssize_t bytes_written, total_bytes_written = 0; 1759 1760 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1761 if (pcchunk == NULL) 1762 return -ENOMEM; 1763 1764 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1765 /* Request a key from the server to identify the source of the copy */ 1766 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1767 srcfile->fid.persistent_fid, 1768 srcfile->fid.volatile_fid, pcchunk); 1769 1770 /* Note: request_res_key sets res_key null only if rc !=0 */ 1771 if (rc) 1772 goto cchunk_out; 1773 1774 /* For now array only one chunk long, will make more flexible later */ 1775 pcchunk->ChunkCount = cpu_to_le32(1); 1776 pcchunk->Reserved = 0; 1777 pcchunk->Reserved2 = 0; 1778 1779 tcon = tlink_tcon(trgtfile->tlink); 1780 1781 while (len > 0) { 1782 pcchunk->SourceOffset = cpu_to_le64(src_off); 1783 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1784 pcchunk->Length = 1785 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1786 1787 /* Request server copy to target from src identified by key */ 1788 kfree(retbuf); 1789 retbuf = NULL; 1790 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1791 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1792 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1793 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1794 if (rc == 0) { 1795 if (ret_data_len != 1796 sizeof(struct copychunk_ioctl_rsp)) { 1797 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1798 rc = -EIO; 1799 goto cchunk_out; 1800 } 1801 if (retbuf->TotalBytesWritten == 0) { 1802 cifs_dbg(FYI, "no bytes copied\n"); 1803 rc = -EIO; 1804 goto cchunk_out; 1805 } 1806 /* 1807 * Check if server claimed to write more than we asked 1808 */ 1809 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1810 le32_to_cpu(pcchunk->Length)) { 1811 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1812 rc = -EIO; 1813 goto cchunk_out; 1814 } 1815 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1816 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1817 rc = -EIO; 1818 goto cchunk_out; 1819 } 1820 chunks_copied++; 1821 1822 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1823 src_off += bytes_written; 1824 dest_off += bytes_written; 1825 len -= bytes_written; 1826 total_bytes_written += bytes_written; 1827 1828 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1829 le32_to_cpu(retbuf->ChunksWritten), 1830 le32_to_cpu(retbuf->ChunkBytesWritten), 1831 bytes_written); 1832 } else if (rc == -EINVAL) { 1833 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1834 goto cchunk_out; 1835 1836 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1837 le32_to_cpu(retbuf->ChunksWritten), 1838 le32_to_cpu(retbuf->ChunkBytesWritten), 1839 le32_to_cpu(retbuf->TotalBytesWritten)); 1840 1841 /* 1842 * Check if this is the first request using these sizes, 1843 * (ie check if copy succeed once with original sizes 1844 * and check if the server gave us different sizes after 1845 * we already updated max sizes on previous request). 1846 * if not then why is the server returning an error now 1847 */ 1848 if ((chunks_copied != 0) || chunk_sizes_updated) 1849 goto cchunk_out; 1850 1851 /* Check that server is not asking us to grow size */ 1852 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1853 tcon->max_bytes_chunk) 1854 tcon->max_bytes_chunk = 1855 le32_to_cpu(retbuf->ChunkBytesWritten); 1856 else 1857 goto cchunk_out; /* server gave us bogus size */ 1858 1859 /* No need to change MaxChunks since already set to 1 */ 1860 chunk_sizes_updated = true; 1861 } else 1862 goto cchunk_out; 1863 } 1864 1865 cchunk_out: 1866 kfree(pcchunk); 1867 kfree(retbuf); 1868 if (rc) 1869 return rc; 1870 else 1871 return total_bytes_written; 1872 } 1873 1874 static int 1875 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1876 struct cifs_fid *fid) 1877 { 1878 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1879 } 1880 1881 static unsigned int 1882 smb2_read_data_offset(char *buf) 1883 { 1884 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1885 1886 return rsp->DataOffset; 1887 } 1888 1889 static unsigned int 1890 smb2_read_data_length(char *buf, bool in_remaining) 1891 { 1892 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1893 1894 if (in_remaining) 1895 return le32_to_cpu(rsp->DataRemaining); 1896 1897 return le32_to_cpu(rsp->DataLength); 1898 } 1899 1900 1901 static int 1902 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1903 struct cifs_io_parms *parms, unsigned int *bytes_read, 1904 char **buf, int *buf_type) 1905 { 1906 parms->persistent_fid = pfid->persistent_fid; 1907 parms->volatile_fid = pfid->volatile_fid; 1908 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1909 } 1910 1911 static int 1912 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1913 struct cifs_io_parms *parms, unsigned int *written, 1914 struct kvec *iov, unsigned long nr_segs) 1915 { 1916 1917 parms->persistent_fid = pfid->persistent_fid; 1918 parms->volatile_fid = pfid->volatile_fid; 1919 return SMB2_write(xid, parms, written, iov, nr_segs); 1920 } 1921 1922 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1923 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1924 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1925 { 1926 struct cifsInodeInfo *cifsi; 1927 int rc; 1928 1929 cifsi = CIFS_I(inode); 1930 1931 /* if file already sparse don't bother setting sparse again */ 1932 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1933 return true; /* already sparse */ 1934 1935 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1936 return true; /* already not sparse */ 1937 1938 /* 1939 * Can't check for sparse support on share the usual way via the 1940 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1941 * since Samba server doesn't set the flag on the share, yet 1942 * supports the set sparse FSCTL and returns sparse correctly 1943 * in the file attributes. If we fail setting sparse though we 1944 * mark that server does not support sparse files for this share 1945 * to avoid repeatedly sending the unsupported fsctl to server 1946 * if the file is repeatedly extended. 1947 */ 1948 if (tcon->broken_sparse_sup) 1949 return false; 1950 1951 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1952 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1953 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1954 if (rc) { 1955 tcon->broken_sparse_sup = true; 1956 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1957 return false; 1958 } 1959 1960 if (setsparse) 1961 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1962 else 1963 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1964 1965 return true; 1966 } 1967 1968 static int 1969 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1970 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1971 { 1972 struct inode *inode; 1973 1974 /* 1975 * If extending file more than one page make sparse. Many Linux fs 1976 * make files sparse by default when extending via ftruncate 1977 */ 1978 inode = d_inode(cfile->dentry); 1979 1980 if (!set_alloc && (size > inode->i_size + 8192)) { 1981 __u8 set_sparse = 1; 1982 1983 /* whether set sparse succeeds or not, extend the file */ 1984 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1985 } 1986 1987 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1988 cfile->fid.volatile_fid, cfile->pid, size); 1989 } 1990 1991 static int 1992 smb2_duplicate_extents(const unsigned int xid, 1993 struct cifsFileInfo *srcfile, 1994 struct cifsFileInfo *trgtfile, u64 src_off, 1995 u64 len, u64 dest_off) 1996 { 1997 int rc; 1998 unsigned int ret_data_len; 1999 struct inode *inode; 2000 struct duplicate_extents_to_file dup_ext_buf; 2001 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2002 2003 /* server fileays advertise duplicate extent support with this flag */ 2004 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2005 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2006 return -EOPNOTSUPP; 2007 2008 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2009 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2010 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2011 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2012 dup_ext_buf.ByteCount = cpu_to_le64(len); 2013 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2014 src_off, dest_off, len); 2015 2016 inode = d_inode(trgtfile->dentry); 2017 if (inode->i_size < dest_off + len) { 2018 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2019 if (rc) 2020 goto duplicate_extents_out; 2021 2022 /* 2023 * Although also could set plausible allocation size (i_blocks) 2024 * here in addition to setting the file size, in reflink 2025 * it is likely that the target file is sparse. Its allocation 2026 * size will be queried on next revalidate, but it is important 2027 * to make sure that file's cached size is updated immediately 2028 */ 2029 cifs_setsize(inode, dest_off + len); 2030 } 2031 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2032 trgtfile->fid.volatile_fid, 2033 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2034 (char *)&dup_ext_buf, 2035 sizeof(struct duplicate_extents_to_file), 2036 CIFSMaxBufSize, NULL, 2037 &ret_data_len); 2038 2039 if (ret_data_len > 0) 2040 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2041 2042 duplicate_extents_out: 2043 return rc; 2044 } 2045 2046 static int 2047 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2048 struct cifsFileInfo *cfile) 2049 { 2050 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2051 cfile->fid.volatile_fid); 2052 } 2053 2054 static int 2055 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2056 struct cifsFileInfo *cfile) 2057 { 2058 struct fsctl_set_integrity_information_req integr_info; 2059 unsigned int ret_data_len; 2060 2061 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2062 integr_info.Flags = 0; 2063 integr_info.Reserved = 0; 2064 2065 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2066 cfile->fid.volatile_fid, 2067 FSCTL_SET_INTEGRITY_INFORMATION, 2068 (char *)&integr_info, 2069 sizeof(struct fsctl_set_integrity_information_req), 2070 CIFSMaxBufSize, NULL, 2071 &ret_data_len); 2072 2073 } 2074 2075 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2076 #define GMT_TOKEN_SIZE 50 2077 2078 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2079 2080 /* 2081 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2082 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2083 */ 2084 static int 2085 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2086 struct cifsFileInfo *cfile, void __user *ioc_buf) 2087 { 2088 char *retbuf = NULL; 2089 unsigned int ret_data_len = 0; 2090 int rc; 2091 u32 max_response_size; 2092 struct smb_snapshot_array snapshot_in; 2093 2094 /* 2095 * On the first query to enumerate the list of snapshots available 2096 * for this volume the buffer begins with 0 (number of snapshots 2097 * which can be returned is zero since at that point we do not know 2098 * how big the buffer needs to be). On the second query, 2099 * it (ret_data_len) is set to number of snapshots so we can 2100 * know to set the maximum response size larger (see below). 2101 */ 2102 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2103 return -EFAULT; 2104 2105 /* 2106 * Note that for snapshot queries that servers like Azure expect that 2107 * the first query be minimal size (and just used to get the number/size 2108 * of previous versions) so response size must be specified as EXACTLY 2109 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2110 * of eight bytes. 2111 */ 2112 if (ret_data_len == 0) 2113 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2114 else 2115 max_response_size = CIFSMaxBufSize; 2116 2117 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2118 cfile->fid.volatile_fid, 2119 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2120 NULL, 0 /* no input data */, max_response_size, 2121 (char **)&retbuf, 2122 &ret_data_len); 2123 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2124 rc, ret_data_len); 2125 if (rc) 2126 return rc; 2127 2128 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2129 /* Fixup buffer */ 2130 if (copy_from_user(&snapshot_in, ioc_buf, 2131 sizeof(struct smb_snapshot_array))) { 2132 rc = -EFAULT; 2133 kfree(retbuf); 2134 return rc; 2135 } 2136 2137 /* 2138 * Check for min size, ie not large enough to fit even one GMT 2139 * token (snapshot). On the first ioctl some users may pass in 2140 * smaller size (or zero) to simply get the size of the array 2141 * so the user space caller can allocate sufficient memory 2142 * and retry the ioctl again with larger array size sufficient 2143 * to hold all of the snapshot GMT tokens on the second try. 2144 */ 2145 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2146 ret_data_len = sizeof(struct smb_snapshot_array); 2147 2148 /* 2149 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2150 * the snapshot array (of 50 byte GMT tokens) each 2151 * representing an available previous version of the data 2152 */ 2153 if (ret_data_len > (snapshot_in.snapshot_array_size + 2154 sizeof(struct smb_snapshot_array))) 2155 ret_data_len = snapshot_in.snapshot_array_size + 2156 sizeof(struct smb_snapshot_array); 2157 2158 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2159 rc = -EFAULT; 2160 } 2161 2162 kfree(retbuf); 2163 return rc; 2164 } 2165 2166 2167 2168 static int 2169 smb3_notify(const unsigned int xid, struct file *pfile, 2170 void __user *ioc_buf, bool return_changes) 2171 { 2172 struct smb3_notify_info notify; 2173 struct smb3_notify_info __user *pnotify_buf; 2174 struct dentry *dentry = pfile->f_path.dentry; 2175 struct inode *inode = file_inode(pfile); 2176 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2177 struct cifs_open_parms oparms; 2178 struct cifs_fid fid; 2179 struct cifs_tcon *tcon; 2180 const unsigned char *path; 2181 char *returned_ioctl_info = NULL; 2182 void *page = alloc_dentry_path(); 2183 __le16 *utf16_path = NULL; 2184 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2185 int rc = 0; 2186 __u32 ret_len = 0; 2187 2188 path = build_path_from_dentry(dentry, page); 2189 if (IS_ERR(path)) { 2190 rc = PTR_ERR(path); 2191 goto notify_exit; 2192 } 2193 2194 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2195 if (utf16_path == NULL) { 2196 rc = -ENOMEM; 2197 goto notify_exit; 2198 } 2199 2200 if (return_changes) { 2201 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2202 rc = -EFAULT; 2203 goto notify_exit; 2204 } 2205 } else { 2206 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2207 rc = -EFAULT; 2208 goto notify_exit; 2209 } 2210 notify.data_len = 0; 2211 } 2212 2213 tcon = cifs_sb_master_tcon(cifs_sb); 2214 oparms = (struct cifs_open_parms) { 2215 .tcon = tcon, 2216 .path = path, 2217 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2218 .disposition = FILE_OPEN, 2219 .create_options = cifs_create_options(cifs_sb, 0), 2220 .fid = &fid, 2221 }; 2222 2223 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2224 NULL); 2225 if (rc) 2226 goto notify_exit; 2227 2228 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2229 notify.watch_tree, notify.completion_filter, 2230 notify.data_len, &returned_ioctl_info, &ret_len); 2231 2232 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2233 2234 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2235 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2236 if (ret_len > notify.data_len) 2237 ret_len = notify.data_len; 2238 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2239 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2240 rc = -EFAULT; 2241 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2242 rc = -EFAULT; 2243 } 2244 kfree(returned_ioctl_info); 2245 notify_exit: 2246 free_dentry_path(page); 2247 kfree(utf16_path); 2248 return rc; 2249 } 2250 2251 static int 2252 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2253 const char *path, struct cifs_sb_info *cifs_sb, 2254 struct cifs_fid *fid, __u16 search_flags, 2255 struct cifs_search_info *srch_inf) 2256 { 2257 __le16 *utf16_path; 2258 struct smb_rqst rqst[2]; 2259 struct kvec rsp_iov[2]; 2260 int resp_buftype[2]; 2261 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2262 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2263 int rc, flags = 0; 2264 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2265 struct cifs_open_parms oparms; 2266 struct smb2_query_directory_rsp *qd_rsp = NULL; 2267 struct smb2_create_rsp *op_rsp = NULL; 2268 struct TCP_Server_Info *server; 2269 int retries = 0, cur_sleep = 1; 2270 2271 replay_again: 2272 /* reinitialize for possible replay */ 2273 flags = 0; 2274 oplock = SMB2_OPLOCK_LEVEL_NONE; 2275 server = cifs_pick_channel(tcon->ses); 2276 2277 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2278 if (!utf16_path) 2279 return -ENOMEM; 2280 2281 if (smb3_encryption_required(tcon)) 2282 flags |= CIFS_TRANSFORM_REQ; 2283 2284 memset(rqst, 0, sizeof(rqst)); 2285 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2286 memset(rsp_iov, 0, sizeof(rsp_iov)); 2287 2288 /* Open */ 2289 memset(&open_iov, 0, sizeof(open_iov)); 2290 rqst[0].rq_iov = open_iov; 2291 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2292 2293 oparms = (struct cifs_open_parms) { 2294 .tcon = tcon, 2295 .path = path, 2296 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2297 .disposition = FILE_OPEN, 2298 .create_options = cifs_create_options(cifs_sb, 0), 2299 .fid = fid, 2300 .replay = !!(retries), 2301 }; 2302 2303 rc = SMB2_open_init(tcon, server, 2304 &rqst[0], &oplock, &oparms, utf16_path); 2305 if (rc) 2306 goto qdf_free; 2307 smb2_set_next_command(tcon, &rqst[0]); 2308 2309 /* Query directory */ 2310 srch_inf->entries_in_buffer = 0; 2311 srch_inf->index_of_last_entry = 2; 2312 2313 memset(&qd_iov, 0, sizeof(qd_iov)); 2314 rqst[1].rq_iov = qd_iov; 2315 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2316 2317 rc = SMB2_query_directory_init(xid, tcon, server, 2318 &rqst[1], 2319 COMPOUND_FID, COMPOUND_FID, 2320 0, srch_inf->info_level); 2321 if (rc) 2322 goto qdf_free; 2323 2324 smb2_set_related(&rqst[1]); 2325 2326 if (retries) { 2327 smb2_set_replay(server, &rqst[0]); 2328 smb2_set_replay(server, &rqst[1]); 2329 } 2330 2331 rc = compound_send_recv(xid, tcon->ses, server, 2332 flags, 2, rqst, 2333 resp_buftype, rsp_iov); 2334 2335 /* If the open failed there is nothing to do */ 2336 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2337 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2338 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2339 goto qdf_free; 2340 } 2341 fid->persistent_fid = op_rsp->PersistentFileId; 2342 fid->volatile_fid = op_rsp->VolatileFileId; 2343 2344 /* Anything else than ENODATA means a genuine error */ 2345 if (rc && rc != -ENODATA) { 2346 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2347 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2348 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2349 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2350 goto qdf_free; 2351 } 2352 2353 atomic_inc(&tcon->num_remote_opens); 2354 2355 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2356 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2357 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2358 tcon->tid, tcon->ses->Suid, 0, 0); 2359 srch_inf->endOfSearch = true; 2360 rc = 0; 2361 goto qdf_free; 2362 } 2363 2364 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2365 srch_inf); 2366 if (rc) { 2367 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2368 tcon->ses->Suid, 0, 0, rc); 2369 goto qdf_free; 2370 } 2371 resp_buftype[1] = CIFS_NO_BUFFER; 2372 2373 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2374 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2375 2376 qdf_free: 2377 kfree(utf16_path); 2378 SMB2_open_free(&rqst[0]); 2379 SMB2_query_directory_free(&rqst[1]); 2380 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2381 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2382 2383 if (is_replayable_error(rc) && 2384 smb2_should_replay(tcon, &retries, &cur_sleep)) 2385 goto replay_again; 2386 2387 return rc; 2388 } 2389 2390 static int 2391 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2392 struct cifs_fid *fid, __u16 search_flags, 2393 struct cifs_search_info *srch_inf) 2394 { 2395 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2396 fid->volatile_fid, 0, srch_inf); 2397 } 2398 2399 static int 2400 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2401 struct cifs_fid *fid) 2402 { 2403 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2404 } 2405 2406 /* 2407 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2408 * the number of credits and return true. Otherwise - return false. 2409 */ 2410 static bool 2411 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2412 { 2413 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2414 int scredits, in_flight; 2415 2416 if (shdr->Status != STATUS_PENDING) 2417 return false; 2418 2419 if (shdr->CreditRequest) { 2420 spin_lock(&server->req_lock); 2421 server->credits += le16_to_cpu(shdr->CreditRequest); 2422 scredits = server->credits; 2423 in_flight = server->in_flight; 2424 spin_unlock(&server->req_lock); 2425 wake_up(&server->request_q); 2426 2427 trace_smb3_pend_credits(server->CurrentMid, 2428 server->conn_id, server->hostname, scredits, 2429 le16_to_cpu(shdr->CreditRequest), in_flight); 2430 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2431 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2432 } 2433 2434 return true; 2435 } 2436 2437 static bool 2438 smb2_is_session_expired(char *buf) 2439 { 2440 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2441 2442 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2443 shdr->Status != STATUS_USER_SESSION_DELETED) 2444 return false; 2445 2446 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2447 le64_to_cpu(shdr->SessionId), 2448 le16_to_cpu(shdr->Command), 2449 le64_to_cpu(shdr->MessageId)); 2450 cifs_dbg(FYI, "Session expired or deleted\n"); 2451 2452 return true; 2453 } 2454 2455 static bool 2456 smb2_is_status_io_timeout(char *buf) 2457 { 2458 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2459 2460 if (shdr->Status == STATUS_IO_TIMEOUT) 2461 return true; 2462 else 2463 return false; 2464 } 2465 2466 static bool 2467 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2468 { 2469 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2470 struct TCP_Server_Info *pserver; 2471 struct cifs_ses *ses; 2472 struct cifs_tcon *tcon; 2473 2474 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2475 return false; 2476 2477 /* If server is a channel, select the primary channel */ 2478 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2479 2480 spin_lock(&cifs_tcp_ses_lock); 2481 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2482 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2483 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2484 spin_lock(&tcon->tc_lock); 2485 tcon->need_reconnect = true; 2486 spin_unlock(&tcon->tc_lock); 2487 spin_unlock(&cifs_tcp_ses_lock); 2488 pr_warn_once("Server share %s deleted.\n", 2489 tcon->tree_name); 2490 return true; 2491 } 2492 } 2493 } 2494 spin_unlock(&cifs_tcp_ses_lock); 2495 2496 return false; 2497 } 2498 2499 static int 2500 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2501 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2502 { 2503 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2504 return SMB2_lease_break(0, tcon, cinode->lease_key, 2505 smb2_get_lease_state(cinode)); 2506 2507 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2508 CIFS_CACHE_READ(cinode) ? 1 : 0); 2509 } 2510 2511 void 2512 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2513 { 2514 struct smb2_hdr *shdr; 2515 2516 if (server->dialect < SMB30_PROT_ID) 2517 return; 2518 2519 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2520 if (shdr == NULL) { 2521 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2522 return; 2523 } 2524 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2525 } 2526 2527 void 2528 smb2_set_related(struct smb_rqst *rqst) 2529 { 2530 struct smb2_hdr *shdr; 2531 2532 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2533 if (shdr == NULL) { 2534 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2535 return; 2536 } 2537 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2538 } 2539 2540 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2541 2542 void 2543 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2544 { 2545 struct smb2_hdr *shdr; 2546 struct cifs_ses *ses = tcon->ses; 2547 struct TCP_Server_Info *server = ses->server; 2548 unsigned long len = smb_rqst_len(server, rqst); 2549 int i, num_padding; 2550 2551 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2552 if (shdr == NULL) { 2553 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2554 return; 2555 } 2556 2557 /* SMB headers in a compound are 8 byte aligned. */ 2558 2559 /* No padding needed */ 2560 if (!(len & 7)) 2561 goto finished; 2562 2563 num_padding = 8 - (len & 7); 2564 if (!smb3_encryption_required(tcon)) { 2565 /* 2566 * If we do not have encryption then we can just add an extra 2567 * iov for the padding. 2568 */ 2569 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2570 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2571 rqst->rq_nvec++; 2572 len += num_padding; 2573 } else { 2574 /* 2575 * We can not add a small padding iov for the encryption case 2576 * because the encryption framework can not handle the padding 2577 * iovs. 2578 * We have to flatten this into a single buffer and add 2579 * the padding to it. 2580 */ 2581 for (i = 1; i < rqst->rq_nvec; i++) { 2582 memcpy(rqst->rq_iov[0].iov_base + 2583 rqst->rq_iov[0].iov_len, 2584 rqst->rq_iov[i].iov_base, 2585 rqst->rq_iov[i].iov_len); 2586 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2587 } 2588 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2589 0, num_padding); 2590 rqst->rq_iov[0].iov_len += num_padding; 2591 len += num_padding; 2592 rqst->rq_nvec = 1; 2593 } 2594 2595 finished: 2596 shdr->NextCommand = cpu_to_le32(len); 2597 } 2598 2599 /* 2600 * helper function for exponential backoff and check if replayable 2601 */ 2602 bool smb2_should_replay(struct cifs_tcon *tcon, 2603 int *pretries, 2604 int *pcur_sleep) 2605 { 2606 if (!pretries || !pcur_sleep) 2607 return false; 2608 2609 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2610 msleep(*pcur_sleep); 2611 (*pcur_sleep) = ((*pcur_sleep) << 1); 2612 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2613 (*pcur_sleep) = CIFS_MAX_SLEEP; 2614 return true; 2615 } 2616 2617 return false; 2618 } 2619 2620 /* 2621 * Passes the query info response back to the caller on success. 2622 * Caller need to free this with free_rsp_buf(). 2623 */ 2624 int 2625 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2626 const char *path, u32 desired_access, 2627 u32 class, u32 type, u32 output_len, 2628 struct kvec *rsp, int *buftype, 2629 struct cifs_sb_info *cifs_sb) 2630 { 2631 struct smb2_compound_vars *vars; 2632 struct cifs_ses *ses = tcon->ses; 2633 struct TCP_Server_Info *server; 2634 int flags = CIFS_CP_CREATE_CLOSE_OP; 2635 struct smb_rqst *rqst; 2636 int resp_buftype[3]; 2637 struct kvec *rsp_iov; 2638 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2639 struct cifs_open_parms oparms; 2640 struct cifs_fid fid; 2641 int rc; 2642 __le16 *utf16_path; 2643 struct cached_fid *cfid = NULL; 2644 int retries = 0, cur_sleep = 1; 2645 2646 replay_again: 2647 /* reinitialize for possible replay */ 2648 flags = CIFS_CP_CREATE_CLOSE_OP; 2649 oplock = SMB2_OPLOCK_LEVEL_NONE; 2650 server = cifs_pick_channel(ses); 2651 2652 if (!path) 2653 path = ""; 2654 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2655 if (!utf16_path) 2656 return -ENOMEM; 2657 2658 if (smb3_encryption_required(tcon)) 2659 flags |= CIFS_TRANSFORM_REQ; 2660 2661 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2662 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2663 if (!vars) { 2664 rc = -ENOMEM; 2665 goto out_free_path; 2666 } 2667 rqst = vars->rqst; 2668 rsp_iov = vars->rsp_iov; 2669 2670 /* 2671 * We can only call this for things we know are directories. 2672 */ 2673 if (!strcmp(path, "")) 2674 open_cached_dir(xid, tcon, path, cifs_sb, false, 2675 &cfid); /* cfid null if open dir failed */ 2676 2677 rqst[0].rq_iov = vars->open_iov; 2678 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2679 2680 oparms = (struct cifs_open_parms) { 2681 .tcon = tcon, 2682 .path = path, 2683 .desired_access = desired_access, 2684 .disposition = FILE_OPEN, 2685 .create_options = cifs_create_options(cifs_sb, 0), 2686 .fid = &fid, 2687 .replay = !!(retries), 2688 }; 2689 2690 rc = SMB2_open_init(tcon, server, 2691 &rqst[0], &oplock, &oparms, utf16_path); 2692 if (rc) 2693 goto qic_exit; 2694 smb2_set_next_command(tcon, &rqst[0]); 2695 2696 rqst[1].rq_iov = &vars->qi_iov; 2697 rqst[1].rq_nvec = 1; 2698 2699 if (cfid) { 2700 rc = SMB2_query_info_init(tcon, server, 2701 &rqst[1], 2702 cfid->fid.persistent_fid, 2703 cfid->fid.volatile_fid, 2704 class, type, 0, 2705 output_len, 0, 2706 NULL); 2707 } else { 2708 rc = SMB2_query_info_init(tcon, server, 2709 &rqst[1], 2710 COMPOUND_FID, 2711 COMPOUND_FID, 2712 class, type, 0, 2713 output_len, 0, 2714 NULL); 2715 } 2716 if (rc) 2717 goto qic_exit; 2718 if (!cfid) { 2719 smb2_set_next_command(tcon, &rqst[1]); 2720 smb2_set_related(&rqst[1]); 2721 } 2722 2723 rqst[2].rq_iov = &vars->close_iov; 2724 rqst[2].rq_nvec = 1; 2725 2726 rc = SMB2_close_init(tcon, server, 2727 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2728 if (rc) 2729 goto qic_exit; 2730 smb2_set_related(&rqst[2]); 2731 2732 if (retries) { 2733 if (!cfid) { 2734 smb2_set_replay(server, &rqst[0]); 2735 smb2_set_replay(server, &rqst[2]); 2736 } 2737 smb2_set_replay(server, &rqst[1]); 2738 } 2739 2740 if (cfid) { 2741 rc = compound_send_recv(xid, ses, server, 2742 flags, 1, &rqst[1], 2743 &resp_buftype[1], &rsp_iov[1]); 2744 } else { 2745 rc = compound_send_recv(xid, ses, server, 2746 flags, 3, rqst, 2747 resp_buftype, rsp_iov); 2748 } 2749 if (rc) { 2750 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2751 if (rc == -EREMCHG) { 2752 tcon->need_reconnect = true; 2753 pr_warn_once("server share %s deleted\n", 2754 tcon->tree_name); 2755 } 2756 goto qic_exit; 2757 } 2758 *rsp = rsp_iov[1]; 2759 *buftype = resp_buftype[1]; 2760 2761 qic_exit: 2762 SMB2_open_free(&rqst[0]); 2763 SMB2_query_info_free(&rqst[1]); 2764 SMB2_close_free(&rqst[2]); 2765 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2766 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2767 if (cfid) 2768 close_cached_dir(cfid); 2769 kfree(vars); 2770 out_free_path: 2771 kfree(utf16_path); 2772 2773 if (is_replayable_error(rc) && 2774 smb2_should_replay(tcon, &retries, &cur_sleep)) 2775 goto replay_again; 2776 2777 return rc; 2778 } 2779 2780 static int 2781 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2782 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2783 { 2784 struct smb2_query_info_rsp *rsp; 2785 struct smb2_fs_full_size_info *info = NULL; 2786 struct kvec rsp_iov = {NULL, 0}; 2787 int buftype = CIFS_NO_BUFFER; 2788 int rc; 2789 2790 2791 rc = smb2_query_info_compound(xid, tcon, "", 2792 FILE_READ_ATTRIBUTES, 2793 FS_FULL_SIZE_INFORMATION, 2794 SMB2_O_INFO_FILESYSTEM, 2795 sizeof(struct smb2_fs_full_size_info), 2796 &rsp_iov, &buftype, cifs_sb); 2797 if (rc) 2798 goto qfs_exit; 2799 2800 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2801 buf->f_type = SMB2_SUPER_MAGIC; 2802 info = (struct smb2_fs_full_size_info *)( 2803 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2804 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2805 le32_to_cpu(rsp->OutputBufferLength), 2806 &rsp_iov, 2807 sizeof(struct smb2_fs_full_size_info)); 2808 if (!rc) 2809 smb2_copy_fs_info_to_kstatfs(info, buf); 2810 2811 qfs_exit: 2812 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2813 free_rsp_buf(buftype, rsp_iov.iov_base); 2814 return rc; 2815 } 2816 2817 static int 2818 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2819 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2820 { 2821 int rc; 2822 __le16 srch_path = 0; /* Null - open root of share */ 2823 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2824 struct cifs_open_parms oparms; 2825 struct cifs_fid fid; 2826 2827 if (!tcon->posix_extensions) 2828 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2829 2830 oparms = (struct cifs_open_parms) { 2831 .tcon = tcon, 2832 .path = "", 2833 .desired_access = FILE_READ_ATTRIBUTES, 2834 .disposition = FILE_OPEN, 2835 .create_options = cifs_create_options(cifs_sb, 0), 2836 .fid = &fid, 2837 }; 2838 2839 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2840 NULL, NULL); 2841 if (rc) 2842 return rc; 2843 2844 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2845 fid.volatile_fid, buf); 2846 buf->f_type = SMB2_SUPER_MAGIC; 2847 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2848 return rc; 2849 } 2850 2851 static bool 2852 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2853 { 2854 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2855 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2856 } 2857 2858 static int 2859 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2860 __u64 length, __u32 type, int lock, int unlock, bool wait) 2861 { 2862 if (unlock && !lock) 2863 type = SMB2_LOCKFLAG_UNLOCK; 2864 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2865 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2866 current->tgid, length, offset, type, wait); 2867 } 2868 2869 static void 2870 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2871 { 2872 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2873 } 2874 2875 static void 2876 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2877 { 2878 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2879 } 2880 2881 static void 2882 smb2_new_lease_key(struct cifs_fid *fid) 2883 { 2884 generate_random_uuid(fid->lease_key); 2885 } 2886 2887 static int 2888 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2889 const char *search_name, 2890 struct dfs_info3_param **target_nodes, 2891 unsigned int *num_of_nodes, 2892 const struct nls_table *nls_codepage, int remap) 2893 { 2894 int rc; 2895 __le16 *utf16_path = NULL; 2896 int utf16_path_len = 0; 2897 struct cifs_tcon *tcon; 2898 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2899 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2900 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2901 int retry_count = 0; 2902 2903 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2904 2905 /* 2906 * Try to use the IPC tcon, otherwise just use any 2907 */ 2908 tcon = ses->tcon_ipc; 2909 if (tcon == NULL) { 2910 spin_lock(&cifs_tcp_ses_lock); 2911 tcon = list_first_entry_or_null(&ses->tcon_list, 2912 struct cifs_tcon, 2913 tcon_list); 2914 if (tcon) 2915 tcon->tc_count++; 2916 spin_unlock(&cifs_tcp_ses_lock); 2917 } 2918 2919 if (tcon == NULL) { 2920 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2921 ses); 2922 rc = -ENOTCONN; 2923 goto out; 2924 } 2925 2926 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2927 &utf16_path_len, 2928 nls_codepage, remap); 2929 if (!utf16_path) { 2930 rc = -ENOMEM; 2931 goto out; 2932 } 2933 2934 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2935 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2936 if (!dfs_req) { 2937 rc = -ENOMEM; 2938 goto out; 2939 } 2940 2941 /* Highest DFS referral version understood */ 2942 dfs_req->MaxReferralLevel = DFS_VERSION; 2943 2944 /* Path to resolve in an UTF-16 null-terminated string */ 2945 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2946 2947 do { 2948 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2949 FSCTL_DFS_GET_REFERRALS, 2950 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2951 (char **)&dfs_rsp, &dfs_rsp_size); 2952 if (!is_retryable_error(rc)) 2953 break; 2954 usleep_range(512, 2048); 2955 } while (++retry_count < 5); 2956 2957 if (!rc && !dfs_rsp) 2958 rc = -EIO; 2959 if (rc) { 2960 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2961 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2962 goto out; 2963 } 2964 2965 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2966 num_of_nodes, target_nodes, 2967 nls_codepage, remap, search_name, 2968 true /* is_unicode */); 2969 if (rc) { 2970 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2971 goto out; 2972 } 2973 2974 out: 2975 if (tcon && !tcon->ipc) { 2976 /* ipc tcons are not refcounted */ 2977 spin_lock(&cifs_tcp_ses_lock); 2978 tcon->tc_count--; 2979 /* tc_count can never go negative */ 2980 WARN_ON(tcon->tc_count < 0); 2981 spin_unlock(&cifs_tcp_ses_lock); 2982 } 2983 kfree(utf16_path); 2984 kfree(dfs_req); 2985 kfree(dfs_rsp); 2986 return rc; 2987 } 2988 2989 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2990 static int parse_reparse_posix(struct reparse_posix_data *buf, 2991 struct cifs_sb_info *cifs_sb, 2992 struct cifs_open_info_data *data) 2993 { 2994 unsigned int len; 2995 u64 type; 2996 2997 switch ((type = le64_to_cpu(buf->InodeType))) { 2998 case NFS_SPECFILE_LNK: 2999 len = le16_to_cpu(buf->ReparseDataLength); 3000 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer, 3001 len, true, 3002 cifs_sb->local_nls); 3003 if (!data->symlink_target) 3004 return -ENOMEM; 3005 convert_delimiter(data->symlink_target, '/'); 3006 cifs_dbg(FYI, "%s: target path: %s\n", 3007 __func__, data->symlink_target); 3008 break; 3009 case NFS_SPECFILE_CHR: 3010 case NFS_SPECFILE_BLK: 3011 case NFS_SPECFILE_FIFO: 3012 case NFS_SPECFILE_SOCK: 3013 break; 3014 default: 3015 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n", 3016 __func__, type); 3017 return -EOPNOTSUPP; 3018 } 3019 return 0; 3020 } 3021 3022 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym, 3023 u32 plen, bool unicode, 3024 struct cifs_sb_info *cifs_sb, 3025 struct cifs_open_info_data *data) 3026 { 3027 unsigned int len; 3028 unsigned int offs; 3029 3030 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 3031 3032 offs = le16_to_cpu(sym->SubstituteNameOffset); 3033 len = le16_to_cpu(sym->SubstituteNameLength); 3034 if (offs + 20 > plen || offs + len + 20 > plen) { 3035 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 3036 return -EIO; 3037 } 3038 3039 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs, 3040 len, unicode, 3041 cifs_sb->local_nls); 3042 if (!data->symlink_target) 3043 return -ENOMEM; 3044 3045 convert_delimiter(data->symlink_target, '/'); 3046 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target); 3047 3048 return 0; 3049 } 3050 3051 int parse_reparse_point(struct reparse_data_buffer *buf, 3052 u32 plen, struct cifs_sb_info *cifs_sb, 3053 bool unicode, struct cifs_open_info_data *data) 3054 { 3055 data->reparse.buf = buf; 3056 3057 /* See MS-FSCC 2.1.2 */ 3058 switch (le32_to_cpu(buf->ReparseTag)) { 3059 case IO_REPARSE_TAG_NFS: 3060 return parse_reparse_posix((struct reparse_posix_data *)buf, 3061 cifs_sb, data); 3062 case IO_REPARSE_TAG_SYMLINK: 3063 return parse_reparse_symlink( 3064 (struct reparse_symlink_data_buffer *)buf, 3065 plen, unicode, cifs_sb, data); 3066 case IO_REPARSE_TAG_LX_SYMLINK: 3067 case IO_REPARSE_TAG_AF_UNIX: 3068 case IO_REPARSE_TAG_LX_FIFO: 3069 case IO_REPARSE_TAG_LX_CHR: 3070 case IO_REPARSE_TAG_LX_BLK: 3071 return 0; 3072 default: 3073 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n", 3074 __func__, le32_to_cpu(buf->ReparseTag)); 3075 return -EOPNOTSUPP; 3076 } 3077 } 3078 3079 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, 3080 struct kvec *rsp_iov, 3081 struct cifs_open_info_data *data) 3082 { 3083 struct reparse_data_buffer *buf; 3084 struct smb2_ioctl_rsp *io = rsp_iov->iov_base; 3085 u32 plen = le32_to_cpu(io->OutputCount); 3086 3087 buf = (struct reparse_data_buffer *)((u8 *)io + 3088 le32_to_cpu(io->OutputOffset)); 3089 return parse_reparse_point(buf, plen, cifs_sb, true, data); 3090 } 3091 3092 static struct cifs_ntsd * 3093 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3094 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3095 { 3096 struct cifs_ntsd *pntsd = NULL; 3097 unsigned int xid; 3098 int rc = -EOPNOTSUPP; 3099 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3100 3101 if (IS_ERR(tlink)) 3102 return ERR_CAST(tlink); 3103 3104 xid = get_xid(); 3105 cifs_dbg(FYI, "trying to get acl\n"); 3106 3107 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3108 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3109 info); 3110 free_xid(xid); 3111 3112 cifs_put_tlink(tlink); 3113 3114 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3115 if (rc) 3116 return ERR_PTR(rc); 3117 return pntsd; 3118 3119 } 3120 3121 static struct cifs_ntsd * 3122 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3123 const char *path, u32 *pacllen, u32 info) 3124 { 3125 struct cifs_ntsd *pntsd = NULL; 3126 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3127 unsigned int xid; 3128 int rc; 3129 struct cifs_tcon *tcon; 3130 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3131 struct cifs_fid fid; 3132 struct cifs_open_parms oparms; 3133 __le16 *utf16_path; 3134 3135 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3136 if (IS_ERR(tlink)) 3137 return ERR_CAST(tlink); 3138 3139 tcon = tlink_tcon(tlink); 3140 xid = get_xid(); 3141 3142 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3143 if (!utf16_path) { 3144 rc = -ENOMEM; 3145 free_xid(xid); 3146 return ERR_PTR(rc); 3147 } 3148 3149 oparms = (struct cifs_open_parms) { 3150 .tcon = tcon, 3151 .path = path, 3152 .desired_access = READ_CONTROL, 3153 .disposition = FILE_OPEN, 3154 /* 3155 * When querying an ACL, even if the file is a symlink 3156 * we want to open the source not the target, and so 3157 * the protocol requires that the client specify this 3158 * flag when opening a reparse point 3159 */ 3160 .create_options = cifs_create_options(cifs_sb, 0) | 3161 OPEN_REPARSE_POINT, 3162 .fid = &fid, 3163 }; 3164 3165 if (info & SACL_SECINFO) 3166 oparms.desired_access |= SYSTEM_SECURITY; 3167 3168 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3169 NULL); 3170 kfree(utf16_path); 3171 if (!rc) { 3172 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3173 fid.volatile_fid, (void **)&pntsd, pacllen, 3174 info); 3175 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3176 } 3177 3178 cifs_put_tlink(tlink); 3179 free_xid(xid); 3180 3181 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3182 if (rc) 3183 return ERR_PTR(rc); 3184 return pntsd; 3185 } 3186 3187 static int 3188 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3189 struct inode *inode, const char *path, int aclflag) 3190 { 3191 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3192 unsigned int xid; 3193 int rc, access_flags = 0; 3194 struct cifs_tcon *tcon; 3195 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3196 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3197 struct cifs_fid fid; 3198 struct cifs_open_parms oparms; 3199 __le16 *utf16_path; 3200 3201 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3202 if (IS_ERR(tlink)) 3203 return PTR_ERR(tlink); 3204 3205 tcon = tlink_tcon(tlink); 3206 xid = get_xid(); 3207 3208 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3209 access_flags |= WRITE_OWNER; 3210 if (aclflag & CIFS_ACL_SACL) 3211 access_flags |= SYSTEM_SECURITY; 3212 if (aclflag & CIFS_ACL_DACL) 3213 access_flags |= WRITE_DAC; 3214 3215 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3216 if (!utf16_path) { 3217 rc = -ENOMEM; 3218 free_xid(xid); 3219 return rc; 3220 } 3221 3222 oparms = (struct cifs_open_parms) { 3223 .tcon = tcon, 3224 .desired_access = access_flags, 3225 .create_options = cifs_create_options(cifs_sb, 0), 3226 .disposition = FILE_OPEN, 3227 .path = path, 3228 .fid = &fid, 3229 }; 3230 3231 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3232 NULL, NULL); 3233 kfree(utf16_path); 3234 if (!rc) { 3235 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3236 fid.volatile_fid, pnntsd, acllen, aclflag); 3237 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3238 } 3239 3240 cifs_put_tlink(tlink); 3241 free_xid(xid); 3242 return rc; 3243 } 3244 3245 /* Retrieve an ACL from the server */ 3246 static struct cifs_ntsd * 3247 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3248 struct inode *inode, const char *path, 3249 u32 *pacllen, u32 info) 3250 { 3251 struct cifs_ntsd *pntsd = NULL; 3252 struct cifsFileInfo *open_file = NULL; 3253 3254 if (inode && !(info & SACL_SECINFO)) 3255 open_file = find_readable_file(CIFS_I(inode), true); 3256 if (!open_file || (info & SACL_SECINFO)) 3257 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3258 3259 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3260 cifsFileInfo_put(open_file); 3261 return pntsd; 3262 } 3263 3264 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3265 loff_t offset, loff_t len, unsigned int xid) 3266 { 3267 struct cifsFileInfo *cfile = file->private_data; 3268 struct file_zero_data_information fsctl_buf; 3269 3270 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3271 3272 fsctl_buf.FileOffset = cpu_to_le64(offset); 3273 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3274 3275 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3276 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3277 (char *)&fsctl_buf, 3278 sizeof(struct file_zero_data_information), 3279 0, NULL, NULL); 3280 } 3281 3282 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3283 loff_t offset, loff_t len, bool keep_size) 3284 { 3285 struct cifs_ses *ses = tcon->ses; 3286 struct inode *inode = file_inode(file); 3287 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3288 struct cifsFileInfo *cfile = file->private_data; 3289 unsigned long long new_size; 3290 long rc; 3291 unsigned int xid; 3292 3293 xid = get_xid(); 3294 3295 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3296 ses->Suid, offset, len); 3297 3298 inode_lock(inode); 3299 filemap_invalidate_lock(inode->i_mapping); 3300 3301 /* 3302 * We zero the range through ioctl, so we need remove the page caches 3303 * first, otherwise the data may be inconsistent with the server. 3304 */ 3305 truncate_pagecache_range(inode, offset, offset + len - 1); 3306 3307 /* if file not oplocked can't be sure whether asking to extend size */ 3308 rc = -EOPNOTSUPP; 3309 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3310 goto zero_range_exit; 3311 3312 rc = smb3_zero_data(file, tcon, offset, len, xid); 3313 if (rc < 0) 3314 goto zero_range_exit; 3315 3316 /* 3317 * do we also need to change the size of the file? 3318 */ 3319 new_size = offset + len; 3320 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3321 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3322 cfile->fid.volatile_fid, cfile->pid, new_size); 3323 if (rc >= 0) { 3324 truncate_setsize(inode, new_size); 3325 netfs_resize_file(&cifsi->netfs, new_size, true); 3326 if (offset < cifsi->netfs.zero_point) 3327 cifsi->netfs.zero_point = offset; 3328 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3329 } 3330 } 3331 3332 zero_range_exit: 3333 filemap_invalidate_unlock(inode->i_mapping); 3334 inode_unlock(inode); 3335 free_xid(xid); 3336 if (rc) 3337 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3338 ses->Suid, offset, len, rc); 3339 else 3340 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3341 ses->Suid, offset, len); 3342 return rc; 3343 } 3344 3345 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3346 loff_t offset, loff_t len) 3347 { 3348 struct inode *inode = file_inode(file); 3349 struct cifsFileInfo *cfile = file->private_data; 3350 struct file_zero_data_information fsctl_buf; 3351 long rc; 3352 unsigned int xid; 3353 __u8 set_sparse = 1; 3354 3355 xid = get_xid(); 3356 3357 inode_lock(inode); 3358 /* Need to make file sparse, if not already, before freeing range. */ 3359 /* Consider adding equivalent for compressed since it could also work */ 3360 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3361 rc = -EOPNOTSUPP; 3362 goto out; 3363 } 3364 3365 filemap_invalidate_lock(inode->i_mapping); 3366 /* 3367 * We implement the punch hole through ioctl, so we need remove the page 3368 * caches first, otherwise the data may be inconsistent with the server. 3369 */ 3370 truncate_pagecache_range(inode, offset, offset + len - 1); 3371 3372 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3373 3374 fsctl_buf.FileOffset = cpu_to_le64(offset); 3375 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3376 3377 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3378 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3379 (char *)&fsctl_buf, 3380 sizeof(struct file_zero_data_information), 3381 CIFSMaxBufSize, NULL, NULL); 3382 filemap_invalidate_unlock(inode->i_mapping); 3383 out: 3384 inode_unlock(inode); 3385 free_xid(xid); 3386 return rc; 3387 } 3388 3389 static int smb3_simple_fallocate_write_range(unsigned int xid, 3390 struct cifs_tcon *tcon, 3391 struct cifsFileInfo *cfile, 3392 loff_t off, loff_t len, 3393 char *buf) 3394 { 3395 struct cifs_io_parms io_parms = {0}; 3396 int nbytes; 3397 int rc = 0; 3398 struct kvec iov[2]; 3399 3400 io_parms.netfid = cfile->fid.netfid; 3401 io_parms.pid = current->tgid; 3402 io_parms.tcon = tcon; 3403 io_parms.persistent_fid = cfile->fid.persistent_fid; 3404 io_parms.volatile_fid = cfile->fid.volatile_fid; 3405 3406 while (len) { 3407 io_parms.offset = off; 3408 io_parms.length = len; 3409 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3410 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3411 /* iov[0] is reserved for smb header */ 3412 iov[1].iov_base = buf; 3413 iov[1].iov_len = io_parms.length; 3414 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3415 if (rc) 3416 break; 3417 if (nbytes > len) 3418 return -EINVAL; 3419 buf += nbytes; 3420 off += nbytes; 3421 len -= nbytes; 3422 } 3423 return rc; 3424 } 3425 3426 static int smb3_simple_fallocate_range(unsigned int xid, 3427 struct cifs_tcon *tcon, 3428 struct cifsFileInfo *cfile, 3429 loff_t off, loff_t len) 3430 { 3431 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3432 u32 out_data_len; 3433 char *buf = NULL; 3434 loff_t l; 3435 int rc; 3436 3437 in_data.file_offset = cpu_to_le64(off); 3438 in_data.length = cpu_to_le64(len); 3439 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3440 cfile->fid.volatile_fid, 3441 FSCTL_QUERY_ALLOCATED_RANGES, 3442 (char *)&in_data, sizeof(in_data), 3443 1024 * sizeof(struct file_allocated_range_buffer), 3444 (char **)&out_data, &out_data_len); 3445 if (rc) 3446 goto out; 3447 3448 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3449 if (buf == NULL) { 3450 rc = -ENOMEM; 3451 goto out; 3452 } 3453 3454 tmp_data = out_data; 3455 while (len) { 3456 /* 3457 * The rest of the region is unmapped so write it all. 3458 */ 3459 if (out_data_len == 0) { 3460 rc = smb3_simple_fallocate_write_range(xid, tcon, 3461 cfile, off, len, buf); 3462 goto out; 3463 } 3464 3465 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3466 rc = -EINVAL; 3467 goto out; 3468 } 3469 3470 if (off < le64_to_cpu(tmp_data->file_offset)) { 3471 /* 3472 * We are at a hole. Write until the end of the region 3473 * or until the next allocated data, 3474 * whichever comes next. 3475 */ 3476 l = le64_to_cpu(tmp_data->file_offset) - off; 3477 if (len < l) 3478 l = len; 3479 rc = smb3_simple_fallocate_write_range(xid, tcon, 3480 cfile, off, l, buf); 3481 if (rc) 3482 goto out; 3483 off = off + l; 3484 len = len - l; 3485 if (len == 0) 3486 goto out; 3487 } 3488 /* 3489 * We are at a section of allocated data, just skip forward 3490 * until the end of the data or the end of the region 3491 * we are supposed to fallocate, whichever comes first. 3492 */ 3493 l = le64_to_cpu(tmp_data->length); 3494 if (len < l) 3495 l = len; 3496 off += l; 3497 len -= l; 3498 3499 tmp_data = &tmp_data[1]; 3500 out_data_len -= sizeof(struct file_allocated_range_buffer); 3501 } 3502 3503 out: 3504 kfree(out_data); 3505 kfree(buf); 3506 return rc; 3507 } 3508 3509 3510 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3511 loff_t off, loff_t len, bool keep_size) 3512 { 3513 struct inode *inode; 3514 struct cifsInodeInfo *cifsi; 3515 struct cifsFileInfo *cfile = file->private_data; 3516 long rc = -EOPNOTSUPP; 3517 unsigned int xid; 3518 loff_t new_eof; 3519 3520 xid = get_xid(); 3521 3522 inode = d_inode(cfile->dentry); 3523 cifsi = CIFS_I(inode); 3524 3525 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3526 tcon->ses->Suid, off, len); 3527 /* if file not oplocked can't be sure whether asking to extend size */ 3528 if (!CIFS_CACHE_READ(cifsi)) 3529 if (keep_size == false) { 3530 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3531 tcon->tid, tcon->ses->Suid, off, len, rc); 3532 free_xid(xid); 3533 return rc; 3534 } 3535 3536 /* 3537 * Extending the file 3538 */ 3539 if ((keep_size == false) && i_size_read(inode) < off + len) { 3540 rc = inode_newsize_ok(inode, off + len); 3541 if (rc) 3542 goto out; 3543 3544 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3545 smb2_set_sparse(xid, tcon, cfile, inode, false); 3546 3547 new_eof = off + len; 3548 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3549 cfile->fid.volatile_fid, cfile->pid, new_eof); 3550 if (rc == 0) { 3551 netfs_resize_file(&cifsi->netfs, new_eof, true); 3552 cifs_setsize(inode, new_eof); 3553 cifs_truncate_page(inode->i_mapping, inode->i_size); 3554 truncate_setsize(inode, new_eof); 3555 } 3556 goto out; 3557 } 3558 3559 /* 3560 * Files are non-sparse by default so falloc may be a no-op 3561 * Must check if file sparse. If not sparse, and since we are not 3562 * extending then no need to do anything since file already allocated 3563 */ 3564 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3565 rc = 0; 3566 goto out; 3567 } 3568 3569 if (keep_size == true) { 3570 /* 3571 * We can not preallocate pages beyond the end of the file 3572 * in SMB2 3573 */ 3574 if (off >= i_size_read(inode)) { 3575 rc = 0; 3576 goto out; 3577 } 3578 /* 3579 * For fallocates that are partially beyond the end of file, 3580 * clamp len so we only fallocate up to the end of file. 3581 */ 3582 if (off + len > i_size_read(inode)) { 3583 len = i_size_read(inode) - off; 3584 } 3585 } 3586 3587 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3588 /* 3589 * At this point, we are trying to fallocate an internal 3590 * regions of a sparse file. Since smb2 does not have a 3591 * fallocate command we have two otions on how to emulate this. 3592 * We can either turn the entire file to become non-sparse 3593 * which we only do if the fallocate is for virtually 3594 * the whole file, or we can overwrite the region with zeroes 3595 * using SMB2_write, which could be prohibitevly expensive 3596 * if len is large. 3597 */ 3598 /* 3599 * We are only trying to fallocate a small region so 3600 * just write it with zero. 3601 */ 3602 if (len <= 1024 * 1024) { 3603 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3604 off, len); 3605 goto out; 3606 } 3607 3608 /* 3609 * Check if falloc starts within first few pages of file 3610 * and ends within a few pages of the end of file to 3611 * ensure that most of file is being forced to be 3612 * fallocated now. If so then setting whole file sparse 3613 * ie potentially making a few extra pages at the beginning 3614 * or end of the file non-sparse via set_sparse is harmless. 3615 */ 3616 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3617 rc = -EOPNOTSUPP; 3618 goto out; 3619 } 3620 } 3621 3622 smb2_set_sparse(xid, tcon, cfile, inode, false); 3623 rc = 0; 3624 3625 out: 3626 if (rc) 3627 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3628 tcon->ses->Suid, off, len, rc); 3629 else 3630 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3631 tcon->ses->Suid, off, len); 3632 3633 free_xid(xid); 3634 return rc; 3635 } 3636 3637 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3638 loff_t off, loff_t len) 3639 { 3640 int rc; 3641 unsigned int xid; 3642 struct inode *inode = file_inode(file); 3643 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3644 struct cifsFileInfo *cfile = file->private_data; 3645 struct netfs_inode *ictx = &cifsi->netfs; 3646 loff_t old_eof, new_eof; 3647 3648 xid = get_xid(); 3649 3650 inode_lock(inode); 3651 3652 old_eof = i_size_read(inode); 3653 if ((off >= old_eof) || 3654 off + len >= old_eof) { 3655 rc = -EINVAL; 3656 goto out; 3657 } 3658 3659 filemap_invalidate_lock(inode->i_mapping); 3660 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3661 if (rc < 0) 3662 goto out_2; 3663 3664 truncate_pagecache_range(inode, off, old_eof); 3665 ictx->zero_point = old_eof; 3666 3667 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3668 old_eof - off - len, off); 3669 if (rc < 0) 3670 goto out_2; 3671 3672 new_eof = old_eof - len; 3673 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3674 cfile->fid.volatile_fid, cfile->pid, new_eof); 3675 if (rc < 0) 3676 goto out_2; 3677 3678 rc = 0; 3679 3680 truncate_setsize(inode, new_eof); 3681 netfs_resize_file(&cifsi->netfs, new_eof, true); 3682 ictx->zero_point = new_eof; 3683 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3684 out_2: 3685 filemap_invalidate_unlock(inode->i_mapping); 3686 out: 3687 inode_unlock(inode); 3688 free_xid(xid); 3689 return rc; 3690 } 3691 3692 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3693 loff_t off, loff_t len) 3694 { 3695 int rc; 3696 unsigned int xid; 3697 struct cifsFileInfo *cfile = file->private_data; 3698 struct inode *inode = file_inode(file); 3699 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3700 __u64 count, old_eof, new_eof; 3701 3702 xid = get_xid(); 3703 3704 inode_lock(inode); 3705 3706 old_eof = i_size_read(inode); 3707 if (off >= old_eof) { 3708 rc = -EINVAL; 3709 goto out; 3710 } 3711 3712 count = old_eof - off; 3713 new_eof = old_eof + len; 3714 3715 filemap_invalidate_lock(inode->i_mapping); 3716 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3717 if (rc < 0) 3718 goto out_2; 3719 truncate_pagecache_range(inode, off, old_eof); 3720 3721 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3722 cfile->fid.volatile_fid, cfile->pid, new_eof); 3723 if (rc < 0) 3724 goto out_2; 3725 3726 truncate_setsize(inode, new_eof); 3727 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3728 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3729 3730 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3731 if (rc < 0) 3732 goto out_2; 3733 3734 rc = smb3_zero_data(file, tcon, off, len, xid); 3735 if (rc < 0) 3736 goto out_2; 3737 3738 rc = 0; 3739 out_2: 3740 filemap_invalidate_unlock(inode->i_mapping); 3741 out: 3742 inode_unlock(inode); 3743 free_xid(xid); 3744 return rc; 3745 } 3746 3747 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3748 { 3749 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3750 struct cifsInodeInfo *cifsi; 3751 struct inode *inode; 3752 int rc = 0; 3753 struct file_allocated_range_buffer in_data, *out_data = NULL; 3754 u32 out_data_len; 3755 unsigned int xid; 3756 3757 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3758 return generic_file_llseek(file, offset, whence); 3759 3760 inode = d_inode(cfile->dentry); 3761 cifsi = CIFS_I(inode); 3762 3763 if (offset < 0 || offset >= i_size_read(inode)) 3764 return -ENXIO; 3765 3766 xid = get_xid(); 3767 /* 3768 * We need to be sure that all dirty pages are written as they 3769 * might fill holes on the server. 3770 * Note that we also MUST flush any written pages since at least 3771 * some servers (Windows2016) will not reflect recent writes in 3772 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3773 */ 3774 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3775 if (wrcfile) { 3776 filemap_write_and_wait(inode->i_mapping); 3777 smb2_flush_file(xid, tcon, &wrcfile->fid); 3778 cifsFileInfo_put(wrcfile); 3779 } 3780 3781 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3782 if (whence == SEEK_HOLE) 3783 offset = i_size_read(inode); 3784 goto lseek_exit; 3785 } 3786 3787 in_data.file_offset = cpu_to_le64(offset); 3788 in_data.length = cpu_to_le64(i_size_read(inode)); 3789 3790 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3791 cfile->fid.volatile_fid, 3792 FSCTL_QUERY_ALLOCATED_RANGES, 3793 (char *)&in_data, sizeof(in_data), 3794 sizeof(struct file_allocated_range_buffer), 3795 (char **)&out_data, &out_data_len); 3796 if (rc == -E2BIG) 3797 rc = 0; 3798 if (rc) 3799 goto lseek_exit; 3800 3801 if (whence == SEEK_HOLE && out_data_len == 0) 3802 goto lseek_exit; 3803 3804 if (whence == SEEK_DATA && out_data_len == 0) { 3805 rc = -ENXIO; 3806 goto lseek_exit; 3807 } 3808 3809 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3810 rc = -EINVAL; 3811 goto lseek_exit; 3812 } 3813 if (whence == SEEK_DATA) { 3814 offset = le64_to_cpu(out_data->file_offset); 3815 goto lseek_exit; 3816 } 3817 if (offset < le64_to_cpu(out_data->file_offset)) 3818 goto lseek_exit; 3819 3820 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3821 3822 lseek_exit: 3823 free_xid(xid); 3824 kfree(out_data); 3825 if (!rc) 3826 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3827 else 3828 return rc; 3829 } 3830 3831 static int smb3_fiemap(struct cifs_tcon *tcon, 3832 struct cifsFileInfo *cfile, 3833 struct fiemap_extent_info *fei, u64 start, u64 len) 3834 { 3835 unsigned int xid; 3836 struct file_allocated_range_buffer in_data, *out_data; 3837 u32 out_data_len; 3838 int i, num, rc, flags, last_blob; 3839 u64 next; 3840 3841 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3842 if (rc) 3843 return rc; 3844 3845 xid = get_xid(); 3846 again: 3847 in_data.file_offset = cpu_to_le64(start); 3848 in_data.length = cpu_to_le64(len); 3849 3850 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3851 cfile->fid.volatile_fid, 3852 FSCTL_QUERY_ALLOCATED_RANGES, 3853 (char *)&in_data, sizeof(in_data), 3854 1024 * sizeof(struct file_allocated_range_buffer), 3855 (char **)&out_data, &out_data_len); 3856 if (rc == -E2BIG) { 3857 last_blob = 0; 3858 rc = 0; 3859 } else 3860 last_blob = 1; 3861 if (rc) 3862 goto out; 3863 3864 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3865 rc = -EINVAL; 3866 goto out; 3867 } 3868 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3869 rc = -EINVAL; 3870 goto out; 3871 } 3872 3873 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3874 for (i = 0; i < num; i++) { 3875 flags = 0; 3876 if (i == num - 1 && last_blob) 3877 flags |= FIEMAP_EXTENT_LAST; 3878 3879 rc = fiemap_fill_next_extent(fei, 3880 le64_to_cpu(out_data[i].file_offset), 3881 le64_to_cpu(out_data[i].file_offset), 3882 le64_to_cpu(out_data[i].length), 3883 flags); 3884 if (rc < 0) 3885 goto out; 3886 if (rc == 1) { 3887 rc = 0; 3888 goto out; 3889 } 3890 } 3891 3892 if (!last_blob) { 3893 next = le64_to_cpu(out_data[num - 1].file_offset) + 3894 le64_to_cpu(out_data[num - 1].length); 3895 len = len - (next - start); 3896 start = next; 3897 goto again; 3898 } 3899 3900 out: 3901 free_xid(xid); 3902 kfree(out_data); 3903 return rc; 3904 } 3905 3906 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3907 loff_t off, loff_t len) 3908 { 3909 /* KEEP_SIZE already checked for by do_fallocate */ 3910 if (mode & FALLOC_FL_PUNCH_HOLE) 3911 return smb3_punch_hole(file, tcon, off, len); 3912 else if (mode & FALLOC_FL_ZERO_RANGE) { 3913 if (mode & FALLOC_FL_KEEP_SIZE) 3914 return smb3_zero_range(file, tcon, off, len, true); 3915 return smb3_zero_range(file, tcon, off, len, false); 3916 } else if (mode == FALLOC_FL_KEEP_SIZE) 3917 return smb3_simple_falloc(file, tcon, off, len, true); 3918 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3919 return smb3_collapse_range(file, tcon, off, len); 3920 else if (mode == FALLOC_FL_INSERT_RANGE) 3921 return smb3_insert_range(file, tcon, off, len); 3922 else if (mode == 0) 3923 return smb3_simple_falloc(file, tcon, off, len, false); 3924 3925 return -EOPNOTSUPP; 3926 } 3927 3928 static void 3929 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3930 struct cifsInodeInfo *cinode, __u32 oplock, 3931 unsigned int epoch, bool *purge_cache) 3932 { 3933 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3934 } 3935 3936 static void 3937 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3938 unsigned int epoch, bool *purge_cache); 3939 3940 static void 3941 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3942 struct cifsInodeInfo *cinode, __u32 oplock, 3943 unsigned int epoch, bool *purge_cache) 3944 { 3945 unsigned int old_state = cinode->oplock; 3946 unsigned int old_epoch = cinode->epoch; 3947 unsigned int new_state; 3948 3949 if (epoch > old_epoch) { 3950 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3951 cinode->epoch = epoch; 3952 } 3953 3954 new_state = cinode->oplock; 3955 *purge_cache = false; 3956 3957 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3958 (new_state & CIFS_CACHE_READ_FLG) == 0) 3959 *purge_cache = true; 3960 else if (old_state == new_state && (epoch - old_epoch > 1)) 3961 *purge_cache = true; 3962 } 3963 3964 static void 3965 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3966 unsigned int epoch, bool *purge_cache) 3967 { 3968 oplock &= 0xFF; 3969 cinode->lease_granted = false; 3970 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3971 return; 3972 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3973 cinode->oplock = CIFS_CACHE_RHW_FLG; 3974 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3975 &cinode->netfs.inode); 3976 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3977 cinode->oplock = CIFS_CACHE_RW_FLG; 3978 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3979 &cinode->netfs.inode); 3980 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3981 cinode->oplock = CIFS_CACHE_READ_FLG; 3982 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3983 &cinode->netfs.inode); 3984 } else 3985 cinode->oplock = 0; 3986 } 3987 3988 static void 3989 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3990 unsigned int epoch, bool *purge_cache) 3991 { 3992 char message[5] = {0}; 3993 unsigned int new_oplock = 0; 3994 3995 oplock &= 0xFF; 3996 cinode->lease_granted = true; 3997 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3998 return; 3999 4000 /* Check if the server granted an oplock rather than a lease */ 4001 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4002 return smb2_set_oplock_level(cinode, oplock, epoch, 4003 purge_cache); 4004 4005 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4006 new_oplock |= CIFS_CACHE_READ_FLG; 4007 strcat(message, "R"); 4008 } 4009 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4010 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4011 strcat(message, "H"); 4012 } 4013 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4014 new_oplock |= CIFS_CACHE_WRITE_FLG; 4015 strcat(message, "W"); 4016 } 4017 if (!new_oplock) 4018 strncpy(message, "None", sizeof(message)); 4019 4020 cinode->oplock = new_oplock; 4021 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4022 &cinode->netfs.inode); 4023 } 4024 4025 static void 4026 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4027 unsigned int epoch, bool *purge_cache) 4028 { 4029 unsigned int old_oplock = cinode->oplock; 4030 4031 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4032 4033 if (purge_cache) { 4034 *purge_cache = false; 4035 if (old_oplock == CIFS_CACHE_READ_FLG) { 4036 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4037 (epoch - cinode->epoch > 0)) 4038 *purge_cache = true; 4039 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4040 (epoch - cinode->epoch > 1)) 4041 *purge_cache = true; 4042 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4043 (epoch - cinode->epoch > 1)) 4044 *purge_cache = true; 4045 else if (cinode->oplock == 0 && 4046 (epoch - cinode->epoch > 0)) 4047 *purge_cache = true; 4048 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4049 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4050 (epoch - cinode->epoch > 0)) 4051 *purge_cache = true; 4052 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4053 (epoch - cinode->epoch > 1)) 4054 *purge_cache = true; 4055 } 4056 cinode->epoch = epoch; 4057 } 4058 } 4059 4060 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4061 static bool 4062 smb2_is_read_op(__u32 oplock) 4063 { 4064 return oplock == SMB2_OPLOCK_LEVEL_II; 4065 } 4066 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4067 4068 static bool 4069 smb21_is_read_op(__u32 oplock) 4070 { 4071 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4072 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4073 } 4074 4075 static __le32 4076 map_oplock_to_lease(u8 oplock) 4077 { 4078 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4079 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4080 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4081 return SMB2_LEASE_READ_CACHING_LE; 4082 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4083 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4084 SMB2_LEASE_WRITE_CACHING_LE; 4085 return 0; 4086 } 4087 4088 static char * 4089 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 4090 { 4091 struct create_lease *buf; 4092 4093 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4094 if (!buf) 4095 return NULL; 4096 4097 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4098 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4099 4100 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4101 (struct create_lease, lcontext)); 4102 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4103 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4104 (struct create_lease, Name)); 4105 buf->ccontext.NameLength = cpu_to_le16(4); 4106 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4107 buf->Name[0] = 'R'; 4108 buf->Name[1] = 'q'; 4109 buf->Name[2] = 'L'; 4110 buf->Name[3] = 's'; 4111 return (char *)buf; 4112 } 4113 4114 static char * 4115 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4116 { 4117 struct create_lease_v2 *buf; 4118 4119 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4120 if (!buf) 4121 return NULL; 4122 4123 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4124 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4125 4126 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4127 (struct create_lease_v2, lcontext)); 4128 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4129 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4130 (struct create_lease_v2, Name)); 4131 buf->ccontext.NameLength = cpu_to_le16(4); 4132 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4133 buf->Name[0] = 'R'; 4134 buf->Name[1] = 'q'; 4135 buf->Name[2] = 'L'; 4136 buf->Name[3] = 's'; 4137 return (char *)buf; 4138 } 4139 4140 static __u8 4141 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4142 { 4143 struct create_lease *lc = (struct create_lease *)buf; 4144 4145 *epoch = 0; /* not used */ 4146 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4147 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4148 return le32_to_cpu(lc->lcontext.LeaseState); 4149 } 4150 4151 static __u8 4152 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4153 { 4154 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4155 4156 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4157 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4158 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4159 if (lease_key) 4160 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4161 return le32_to_cpu(lc->lcontext.LeaseState); 4162 } 4163 4164 static unsigned int 4165 smb2_wp_retry_size(struct inode *inode) 4166 { 4167 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4168 SMB2_MAX_BUFFER_SIZE); 4169 } 4170 4171 static bool 4172 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4173 { 4174 return !cfile->invalidHandle; 4175 } 4176 4177 static void 4178 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4179 struct smb_rqst *old_rq, __le16 cipher_type) 4180 { 4181 struct smb2_hdr *shdr = 4182 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4183 4184 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4185 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4186 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4187 tr_hdr->Flags = cpu_to_le16(0x01); 4188 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4189 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4190 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4191 else 4192 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4193 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4194 } 4195 4196 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4197 int num_rqst, const u8 *sig, u8 **iv, 4198 struct aead_request **req, struct sg_table *sgt, 4199 unsigned int *num_sgs, size_t *sensitive_size) 4200 { 4201 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4202 unsigned int iv_size = crypto_aead_ivsize(tfm); 4203 unsigned int len; 4204 u8 *p; 4205 4206 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4207 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4208 return ERR_PTR(*num_sgs); 4209 4210 len = iv_size; 4211 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4212 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4213 len += req_size; 4214 len = ALIGN(len, __alignof__(struct scatterlist)); 4215 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4216 *sensitive_size = len; 4217 4218 p = kvzalloc(len, GFP_NOFS); 4219 if (!p) 4220 return ERR_PTR(-ENOMEM); 4221 4222 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4223 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4224 crypto_tfm_ctx_alignment()); 4225 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4226 __alignof__(struct scatterlist)); 4227 return p; 4228 } 4229 4230 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4231 int num_rqst, const u8 *sig, u8 **iv, 4232 struct aead_request **req, struct scatterlist **sgl, 4233 size_t *sensitive_size) 4234 { 4235 struct sg_table sgtable = {}; 4236 unsigned int skip, num_sgs, i, j; 4237 ssize_t rc; 4238 void *p; 4239 4240 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4241 &num_sgs, sensitive_size); 4242 if (IS_ERR(p)) 4243 return ERR_CAST(p); 4244 4245 sg_init_marker(sgtable.sgl, num_sgs); 4246 4247 /* 4248 * The first rqst has a transform header where the 4249 * first 20 bytes are not part of the encrypted blob. 4250 */ 4251 skip = 20; 4252 4253 for (i = 0; i < num_rqst; i++) { 4254 struct iov_iter *iter = &rqst[i].rq_iter; 4255 size_t count = iov_iter_count(iter); 4256 4257 for (j = 0; j < rqst[i].rq_nvec; j++) { 4258 cifs_sg_set_buf(&sgtable, 4259 rqst[i].rq_iov[j].iov_base + skip, 4260 rqst[i].rq_iov[j].iov_len - skip); 4261 4262 /* See the above comment on the 'skip' assignment */ 4263 skip = 0; 4264 } 4265 sgtable.orig_nents = sgtable.nents; 4266 4267 rc = extract_iter_to_sg(iter, count, &sgtable, 4268 num_sgs - sgtable.nents, 0); 4269 iov_iter_revert(iter, rc); 4270 sgtable.orig_nents = sgtable.nents; 4271 } 4272 4273 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4274 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4275 *sgl = sgtable.sgl; 4276 return p; 4277 } 4278 4279 static int 4280 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4281 { 4282 struct TCP_Server_Info *pserver; 4283 struct cifs_ses *ses; 4284 u8 *ses_enc_key; 4285 4286 /* If server is a channel, select the primary channel */ 4287 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4288 4289 spin_lock(&cifs_tcp_ses_lock); 4290 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4291 if (ses->Suid == ses_id) { 4292 spin_lock(&ses->ses_lock); 4293 ses_enc_key = enc ? ses->smb3encryptionkey : 4294 ses->smb3decryptionkey; 4295 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4296 spin_unlock(&ses->ses_lock); 4297 spin_unlock(&cifs_tcp_ses_lock); 4298 return 0; 4299 } 4300 } 4301 spin_unlock(&cifs_tcp_ses_lock); 4302 4303 trace_smb3_ses_not_found(ses_id); 4304 4305 return -EAGAIN; 4306 } 4307 /* 4308 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4309 * iov[0] - transform header (associate data), 4310 * iov[1-N] - SMB2 header and pages - data to encrypt. 4311 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4312 * untouched. 4313 */ 4314 static int 4315 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4316 struct smb_rqst *rqst, int enc) 4317 { 4318 struct smb2_transform_hdr *tr_hdr = 4319 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4320 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4321 int rc = 0; 4322 struct scatterlist *sg; 4323 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4324 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4325 struct aead_request *req; 4326 u8 *iv; 4327 DECLARE_CRYPTO_WAIT(wait); 4328 struct crypto_aead *tfm; 4329 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4330 void *creq; 4331 size_t sensitive_size; 4332 4333 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4334 if (rc) { 4335 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4336 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4337 return rc; 4338 } 4339 4340 rc = smb3_crypto_aead_allocate(server); 4341 if (rc) { 4342 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4343 return rc; 4344 } 4345 4346 tfm = enc ? server->secmech.enc : server->secmech.dec; 4347 4348 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4349 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4350 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4351 else 4352 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4353 4354 if (rc) { 4355 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4356 return rc; 4357 } 4358 4359 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4360 if (rc) { 4361 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4362 return rc; 4363 } 4364 4365 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4366 &sensitive_size); 4367 if (IS_ERR(creq)) 4368 return PTR_ERR(creq); 4369 4370 if (!enc) { 4371 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4372 crypt_len += SMB2_SIGNATURE_SIZE; 4373 } 4374 4375 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4376 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4377 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4378 else { 4379 iv[0] = 3; 4380 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4381 } 4382 4383 aead_request_set_tfm(req, tfm); 4384 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4385 aead_request_set_ad(req, assoc_data_len); 4386 4387 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4388 crypto_req_done, &wait); 4389 4390 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4391 : crypto_aead_decrypt(req), &wait); 4392 4393 if (!rc && enc) 4394 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4395 4396 kvfree_sensitive(creq, sensitive_size); 4397 return rc; 4398 } 4399 4400 /* 4401 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4402 */ 4403 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4404 { 4405 struct folio *folio; 4406 4407 XA_STATE(xas, buffer, 0); 4408 4409 rcu_read_lock(); 4410 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4411 folio_put(folio); 4412 } 4413 rcu_read_unlock(); 4414 xa_destroy(buffer); 4415 } 4416 4417 void 4418 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4419 { 4420 int i; 4421 4422 for (i = 0; i < num_rqst; i++) 4423 if (!xa_empty(&rqst[i].rq_buffer)) 4424 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4425 } 4426 4427 /* 4428 * This function will initialize new_rq and encrypt the content. 4429 * The first entry, new_rq[0], only contains a single iov which contains 4430 * a smb2_transform_hdr and is pre-allocated by the caller. 4431 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4432 * 4433 * The end result is an array of smb_rqst structures where the first structure 4434 * only contains a single iov for the transform header which we then can pass 4435 * to crypt_message(). 4436 * 4437 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4438 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4439 */ 4440 static int 4441 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4442 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4443 { 4444 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4445 struct page *page; 4446 unsigned int orig_len = 0; 4447 int i, j; 4448 int rc = -ENOMEM; 4449 4450 for (i = 1; i < num_rqst; i++) { 4451 struct smb_rqst *old = &old_rq[i - 1]; 4452 struct smb_rqst *new = &new_rq[i]; 4453 struct xarray *buffer = &new->rq_buffer; 4454 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4455 4456 orig_len += smb_rqst_len(server, old); 4457 new->rq_iov = old->rq_iov; 4458 new->rq_nvec = old->rq_nvec; 4459 4460 xa_init(buffer); 4461 4462 if (size > 0) { 4463 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4464 4465 for (j = 0; j < npages; j++) { 4466 void *o; 4467 4468 rc = -ENOMEM; 4469 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4470 if (!page) 4471 goto err_free; 4472 page->index = j; 4473 o = xa_store(buffer, j, page, GFP_KERNEL); 4474 if (xa_is_err(o)) { 4475 rc = xa_err(o); 4476 put_page(page); 4477 goto err_free; 4478 } 4479 4480 xa_set_mark(buffer, j, XA_MARK_0); 4481 4482 seg = min_t(size_t, size - copied, PAGE_SIZE); 4483 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4484 rc = -EFAULT; 4485 goto err_free; 4486 } 4487 copied += seg; 4488 } 4489 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4490 buffer, 0, size); 4491 new->rq_iter_size = size; 4492 } 4493 } 4494 4495 /* fill the 1st iov with a transform header */ 4496 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4497 4498 rc = crypt_message(server, num_rqst, new_rq, 1); 4499 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4500 if (rc) 4501 goto err_free; 4502 4503 return rc; 4504 4505 err_free: 4506 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4507 return rc; 4508 } 4509 4510 static int 4511 smb3_is_transform_hdr(void *buf) 4512 { 4513 struct smb2_transform_hdr *trhdr = buf; 4514 4515 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4516 } 4517 4518 static int 4519 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4520 unsigned int buf_data_size, struct iov_iter *iter, 4521 bool is_offloaded) 4522 { 4523 struct kvec iov[2]; 4524 struct smb_rqst rqst = {NULL}; 4525 size_t iter_size = 0; 4526 int rc; 4527 4528 iov[0].iov_base = buf; 4529 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4530 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4531 iov[1].iov_len = buf_data_size; 4532 4533 rqst.rq_iov = iov; 4534 rqst.rq_nvec = 2; 4535 if (iter) { 4536 rqst.rq_iter = *iter; 4537 rqst.rq_iter_size = iov_iter_count(iter); 4538 iter_size = iov_iter_count(iter); 4539 } 4540 4541 rc = crypt_message(server, 1, &rqst, 0); 4542 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4543 4544 if (rc) 4545 return rc; 4546 4547 memmove(buf, iov[1].iov_base, buf_data_size); 4548 4549 if (!is_offloaded) 4550 server->total_read = buf_data_size + iter_size; 4551 4552 return rc; 4553 } 4554 4555 static int 4556 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4557 unsigned int skip, struct iov_iter *iter) 4558 { 4559 struct page *page; 4560 unsigned long index; 4561 4562 xa_for_each(pages, index, page) { 4563 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4564 4565 n = copy_page_to_iter(page, skip, len, iter); 4566 if (n != len) { 4567 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4568 return -EIO; 4569 } 4570 data_size -= n; 4571 skip = 0; 4572 } 4573 4574 return 0; 4575 } 4576 4577 static int 4578 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4579 char *buf, unsigned int buf_len, struct xarray *pages, 4580 unsigned int pages_len, bool is_offloaded) 4581 { 4582 unsigned int data_offset; 4583 unsigned int data_len; 4584 unsigned int cur_off; 4585 unsigned int cur_page_idx; 4586 unsigned int pad_len; 4587 struct cifs_readdata *rdata = mid->callback_data; 4588 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4589 int length; 4590 bool use_rdma_mr = false; 4591 4592 if (shdr->Command != SMB2_READ) { 4593 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4594 return -EOPNOTSUPP; 4595 } 4596 4597 if (server->ops->is_session_expired && 4598 server->ops->is_session_expired(buf)) { 4599 if (!is_offloaded) 4600 cifs_reconnect(server, true); 4601 return -1; 4602 } 4603 4604 if (server->ops->is_status_pending && 4605 server->ops->is_status_pending(buf, server)) 4606 return -1; 4607 4608 /* set up first two iov to get credits */ 4609 rdata->iov[0].iov_base = buf; 4610 rdata->iov[0].iov_len = 0; 4611 rdata->iov[1].iov_base = buf; 4612 rdata->iov[1].iov_len = 4613 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4614 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4615 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4616 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4617 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4618 4619 rdata->result = server->ops->map_error(buf, true); 4620 if (rdata->result != 0) { 4621 cifs_dbg(FYI, "%s: server returned error %d\n", 4622 __func__, rdata->result); 4623 /* normal error on read response */ 4624 if (is_offloaded) 4625 mid->mid_state = MID_RESPONSE_RECEIVED; 4626 else 4627 dequeue_mid(mid, false); 4628 return 0; 4629 } 4630 4631 data_offset = server->ops->read_data_offset(buf); 4632 #ifdef CONFIG_CIFS_SMB_DIRECT 4633 use_rdma_mr = rdata->mr; 4634 #endif 4635 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4636 4637 if (data_offset < server->vals->read_rsp_size) { 4638 /* 4639 * win2k8 sometimes sends an offset of 0 when the read 4640 * is beyond the EOF. Treat it as if the data starts just after 4641 * the header. 4642 */ 4643 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4644 __func__, data_offset); 4645 data_offset = server->vals->read_rsp_size; 4646 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4647 /* data_offset is beyond the end of smallbuf */ 4648 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4649 __func__, data_offset); 4650 rdata->result = -EIO; 4651 if (is_offloaded) 4652 mid->mid_state = MID_RESPONSE_MALFORMED; 4653 else 4654 dequeue_mid(mid, rdata->result); 4655 return 0; 4656 } 4657 4658 pad_len = data_offset - server->vals->read_rsp_size; 4659 4660 if (buf_len <= data_offset) { 4661 /* read response payload is in pages */ 4662 cur_page_idx = pad_len / PAGE_SIZE; 4663 cur_off = pad_len % PAGE_SIZE; 4664 4665 if (cur_page_idx != 0) { 4666 /* data offset is beyond the 1st page of response */ 4667 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4668 __func__, data_offset); 4669 rdata->result = -EIO; 4670 if (is_offloaded) 4671 mid->mid_state = MID_RESPONSE_MALFORMED; 4672 else 4673 dequeue_mid(mid, rdata->result); 4674 return 0; 4675 } 4676 4677 if (data_len > pages_len - pad_len) { 4678 /* data_len is corrupt -- discard frame */ 4679 rdata->result = -EIO; 4680 if (is_offloaded) 4681 mid->mid_state = MID_RESPONSE_MALFORMED; 4682 else 4683 dequeue_mid(mid, rdata->result); 4684 return 0; 4685 } 4686 4687 /* Copy the data to the output I/O iterator. */ 4688 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4689 cur_off, &rdata->iter); 4690 if (rdata->result != 0) { 4691 if (is_offloaded) 4692 mid->mid_state = MID_RESPONSE_MALFORMED; 4693 else 4694 dequeue_mid(mid, rdata->result); 4695 return 0; 4696 } 4697 rdata->got_bytes = pages_len; 4698 4699 } else if (buf_len >= data_offset + data_len) { 4700 /* read response payload is in buf */ 4701 WARN_ONCE(pages && !xa_empty(pages), 4702 "read data can be either in buf or in pages"); 4703 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4704 if (length < 0) 4705 return length; 4706 rdata->got_bytes = data_len; 4707 } else { 4708 /* read response payload cannot be in both buf and pages */ 4709 WARN_ONCE(1, "buf can not contain only a part of read data"); 4710 rdata->result = -EIO; 4711 if (is_offloaded) 4712 mid->mid_state = MID_RESPONSE_MALFORMED; 4713 else 4714 dequeue_mid(mid, rdata->result); 4715 return 0; 4716 } 4717 4718 if (is_offloaded) 4719 mid->mid_state = MID_RESPONSE_RECEIVED; 4720 else 4721 dequeue_mid(mid, false); 4722 return 0; 4723 } 4724 4725 struct smb2_decrypt_work { 4726 struct work_struct decrypt; 4727 struct TCP_Server_Info *server; 4728 struct xarray buffer; 4729 char *buf; 4730 unsigned int len; 4731 }; 4732 4733 4734 static void smb2_decrypt_offload(struct work_struct *work) 4735 { 4736 struct smb2_decrypt_work *dw = container_of(work, 4737 struct smb2_decrypt_work, decrypt); 4738 int rc; 4739 struct mid_q_entry *mid; 4740 struct iov_iter iter; 4741 4742 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4743 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4744 &iter, true); 4745 if (rc) { 4746 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4747 goto free_pages; 4748 } 4749 4750 dw->server->lstrp = jiffies; 4751 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4752 if (mid == NULL) 4753 cifs_dbg(FYI, "mid not found\n"); 4754 else { 4755 mid->decrypted = true; 4756 rc = handle_read_data(dw->server, mid, dw->buf, 4757 dw->server->vals->read_rsp_size, 4758 &dw->buffer, dw->len, 4759 true); 4760 if (rc >= 0) { 4761 #ifdef CONFIG_CIFS_STATS2 4762 mid->when_received = jiffies; 4763 #endif 4764 if (dw->server->ops->is_network_name_deleted) 4765 dw->server->ops->is_network_name_deleted(dw->buf, 4766 dw->server); 4767 4768 mid->callback(mid); 4769 } else { 4770 spin_lock(&dw->server->srv_lock); 4771 if (dw->server->tcpStatus == CifsNeedReconnect) { 4772 spin_lock(&dw->server->mid_lock); 4773 mid->mid_state = MID_RETRY_NEEDED; 4774 spin_unlock(&dw->server->mid_lock); 4775 spin_unlock(&dw->server->srv_lock); 4776 mid->callback(mid); 4777 } else { 4778 spin_lock(&dw->server->mid_lock); 4779 mid->mid_state = MID_REQUEST_SUBMITTED; 4780 mid->mid_flags &= ~(MID_DELETED); 4781 list_add_tail(&mid->qhead, 4782 &dw->server->pending_mid_q); 4783 spin_unlock(&dw->server->mid_lock); 4784 spin_unlock(&dw->server->srv_lock); 4785 } 4786 } 4787 release_mid(mid); 4788 } 4789 4790 free_pages: 4791 cifs_clear_xarray_buffer(&dw->buffer); 4792 cifs_small_buf_release(dw->buf); 4793 kfree(dw); 4794 } 4795 4796 4797 static int 4798 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4799 int *num_mids) 4800 { 4801 struct page *page; 4802 char *buf = server->smallbuf; 4803 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4804 struct iov_iter iter; 4805 unsigned int len, npages; 4806 unsigned int buflen = server->pdu_size; 4807 int rc; 4808 int i = 0; 4809 struct smb2_decrypt_work *dw; 4810 4811 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4812 if (!dw) 4813 return -ENOMEM; 4814 xa_init(&dw->buffer); 4815 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4816 dw->server = server; 4817 4818 *num_mids = 1; 4819 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4820 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4821 4822 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4823 if (rc < 0) 4824 goto free_dw; 4825 server->total_read += rc; 4826 4827 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4828 server->vals->read_rsp_size; 4829 dw->len = len; 4830 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4831 4832 rc = -ENOMEM; 4833 for (; i < npages; i++) { 4834 void *old; 4835 4836 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4837 if (!page) 4838 goto discard_data; 4839 page->index = i; 4840 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4841 if (xa_is_err(old)) { 4842 rc = xa_err(old); 4843 put_page(page); 4844 goto discard_data; 4845 } 4846 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4847 } 4848 4849 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4850 4851 /* Read the data into the buffer and clear excess bufferage. */ 4852 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4853 if (rc < 0) 4854 goto discard_data; 4855 4856 server->total_read += rc; 4857 if (rc < npages * PAGE_SIZE) 4858 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4859 iov_iter_revert(&iter, npages * PAGE_SIZE); 4860 iov_iter_truncate(&iter, dw->len); 4861 4862 rc = cifs_discard_remaining_data(server); 4863 if (rc) 4864 goto free_pages; 4865 4866 /* 4867 * For large reads, offload to different thread for better performance, 4868 * use more cores decrypting which can be expensive 4869 */ 4870 4871 if ((server->min_offload) && (server->in_flight > 1) && 4872 (server->pdu_size >= server->min_offload)) { 4873 dw->buf = server->smallbuf; 4874 server->smallbuf = (char *)cifs_small_buf_get(); 4875 4876 queue_work(decrypt_wq, &dw->decrypt); 4877 *num_mids = 0; /* worker thread takes care of finding mid */ 4878 return -1; 4879 } 4880 4881 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4882 &iter, false); 4883 if (rc) 4884 goto free_pages; 4885 4886 *mid = smb2_find_mid(server, buf); 4887 if (*mid == NULL) { 4888 cifs_dbg(FYI, "mid not found\n"); 4889 } else { 4890 cifs_dbg(FYI, "mid found\n"); 4891 (*mid)->decrypted = true; 4892 rc = handle_read_data(server, *mid, buf, 4893 server->vals->read_rsp_size, 4894 &dw->buffer, dw->len, false); 4895 if (rc >= 0) { 4896 if (server->ops->is_network_name_deleted) { 4897 server->ops->is_network_name_deleted(buf, 4898 server); 4899 } 4900 } 4901 } 4902 4903 free_pages: 4904 cifs_clear_xarray_buffer(&dw->buffer); 4905 free_dw: 4906 kfree(dw); 4907 return rc; 4908 discard_data: 4909 cifs_discard_remaining_data(server); 4910 goto free_pages; 4911 } 4912 4913 static int 4914 receive_encrypted_standard(struct TCP_Server_Info *server, 4915 struct mid_q_entry **mids, char **bufs, 4916 int *num_mids) 4917 { 4918 int ret, length; 4919 char *buf = server->smallbuf; 4920 struct smb2_hdr *shdr; 4921 unsigned int pdu_length = server->pdu_size; 4922 unsigned int buf_size; 4923 unsigned int next_cmd; 4924 struct mid_q_entry *mid_entry; 4925 int next_is_large; 4926 char *next_buffer = NULL; 4927 4928 *num_mids = 0; 4929 4930 /* switch to large buffer if too big for a small one */ 4931 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4932 server->large_buf = true; 4933 memcpy(server->bigbuf, buf, server->total_read); 4934 buf = server->bigbuf; 4935 } 4936 4937 /* now read the rest */ 4938 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4939 pdu_length - HEADER_SIZE(server) + 1); 4940 if (length < 0) 4941 return length; 4942 server->total_read += length; 4943 4944 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4945 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4946 if (length) 4947 return length; 4948 4949 next_is_large = server->large_buf; 4950 one_more: 4951 shdr = (struct smb2_hdr *)buf; 4952 next_cmd = le32_to_cpu(shdr->NextCommand); 4953 if (next_cmd) { 4954 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4955 return -1; 4956 if (next_is_large) 4957 next_buffer = (char *)cifs_buf_get(); 4958 else 4959 next_buffer = (char *)cifs_small_buf_get(); 4960 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4961 } 4962 4963 mid_entry = smb2_find_mid(server, buf); 4964 if (mid_entry == NULL) 4965 cifs_dbg(FYI, "mid not found\n"); 4966 else { 4967 cifs_dbg(FYI, "mid found\n"); 4968 mid_entry->decrypted = true; 4969 mid_entry->resp_buf_size = server->pdu_size; 4970 } 4971 4972 if (*num_mids >= MAX_COMPOUND) { 4973 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4974 return -1; 4975 } 4976 bufs[*num_mids] = buf; 4977 mids[(*num_mids)++] = mid_entry; 4978 4979 if (mid_entry && mid_entry->handle) 4980 ret = mid_entry->handle(server, mid_entry); 4981 else 4982 ret = cifs_handle_standard(server, mid_entry); 4983 4984 if (ret == 0 && next_cmd) { 4985 pdu_length -= next_cmd; 4986 server->large_buf = next_is_large; 4987 if (next_is_large) 4988 server->bigbuf = buf = next_buffer; 4989 else 4990 server->smallbuf = buf = next_buffer; 4991 goto one_more; 4992 } else if (ret != 0) { 4993 /* 4994 * ret != 0 here means that we didn't get to handle_mid() thus 4995 * server->smallbuf and server->bigbuf are still valid. We need 4996 * to free next_buffer because it is not going to be used 4997 * anywhere. 4998 */ 4999 if (next_is_large) 5000 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5001 else 5002 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5003 } 5004 5005 return ret; 5006 } 5007 5008 static int 5009 smb3_receive_transform(struct TCP_Server_Info *server, 5010 struct mid_q_entry **mids, char **bufs, int *num_mids) 5011 { 5012 char *buf = server->smallbuf; 5013 unsigned int pdu_length = server->pdu_size; 5014 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5015 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5016 5017 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5018 sizeof(struct smb2_hdr)) { 5019 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5020 pdu_length); 5021 cifs_reconnect(server, true); 5022 return -ECONNABORTED; 5023 } 5024 5025 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5026 cifs_server_dbg(VFS, "Transform message is broken\n"); 5027 cifs_reconnect(server, true); 5028 return -ECONNABORTED; 5029 } 5030 5031 /* TODO: add support for compounds containing READ. */ 5032 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5033 return receive_encrypted_read(server, &mids[0], num_mids); 5034 } 5035 5036 return receive_encrypted_standard(server, mids, bufs, num_mids); 5037 } 5038 5039 int 5040 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5041 { 5042 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5043 5044 return handle_read_data(server, mid, buf, server->pdu_size, 5045 NULL, 0, false); 5046 } 5047 5048 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5049 unsigned int *noff) 5050 { 5051 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5052 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5053 5054 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5055 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5056 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5057 return -EINVAL; 5058 } else { 5059 *noff = le32_to_cpu(hdr->NextCommand); 5060 } 5061 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5062 return -EINVAL; 5063 return 0; 5064 } 5065 5066 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5067 struct dentry *dentry, struct cifs_tcon *tcon, 5068 const char *full_path, umode_t mode, dev_t dev) 5069 { 5070 struct cifs_open_info_data buf = {}; 5071 struct TCP_Server_Info *server = tcon->ses->server; 5072 struct cifs_open_parms oparms; 5073 struct cifs_io_parms io_parms = {}; 5074 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5075 struct cifs_fid fid; 5076 unsigned int bytes_written; 5077 struct win_dev *pdev; 5078 struct kvec iov[2]; 5079 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5080 int rc; 5081 5082 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 5083 return -EPERM; 5084 5085 oparms = (struct cifs_open_parms) { 5086 .tcon = tcon, 5087 .cifs_sb = cifs_sb, 5088 .desired_access = GENERIC_WRITE, 5089 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 5090 CREATE_OPTION_SPECIAL), 5091 .disposition = FILE_CREATE, 5092 .path = full_path, 5093 .fid = &fid, 5094 }; 5095 5096 rc = server->ops->open(xid, &oparms, &oplock, &buf); 5097 if (rc) 5098 return rc; 5099 5100 /* 5101 * BB Do not bother to decode buf since no local inode yet to put 5102 * timestamps in, but we can reuse it safely. 5103 */ 5104 pdev = (struct win_dev *)&buf.fi; 5105 io_parms.pid = current->tgid; 5106 io_parms.tcon = tcon; 5107 io_parms.length = sizeof(*pdev); 5108 iov[1].iov_base = pdev; 5109 iov[1].iov_len = sizeof(*pdev); 5110 if (S_ISCHR(mode)) { 5111 memcpy(pdev->type, "IntxCHR", 8); 5112 pdev->major = cpu_to_le64(MAJOR(dev)); 5113 pdev->minor = cpu_to_le64(MINOR(dev)); 5114 } else if (S_ISBLK(mode)) { 5115 memcpy(pdev->type, "IntxBLK", 8); 5116 pdev->major = cpu_to_le64(MAJOR(dev)); 5117 pdev->minor = cpu_to_le64(MINOR(dev)); 5118 } else if (S_ISFIFO(mode)) { 5119 memcpy(pdev->type, "LnxFIFO", 8); 5120 } 5121 5122 rc = server->ops->sync_write(xid, &fid, &io_parms, 5123 &bytes_written, iov, 1); 5124 server->ops->close(xid, tcon, &fid); 5125 d_drop(dentry); 5126 /* FIXME: add code here to set EAs */ 5127 cifs_free_open_info(&buf); 5128 return rc; 5129 } 5130 5131 static inline u64 mode_nfs_type(mode_t mode) 5132 { 5133 switch (mode & S_IFMT) { 5134 case S_IFBLK: return NFS_SPECFILE_BLK; 5135 case S_IFCHR: return NFS_SPECFILE_CHR; 5136 case S_IFIFO: return NFS_SPECFILE_FIFO; 5137 case S_IFSOCK: return NFS_SPECFILE_SOCK; 5138 } 5139 return 0; 5140 } 5141 5142 static int nfs_set_reparse_buf(struct reparse_posix_data *buf, 5143 mode_t mode, dev_t dev, 5144 struct kvec *iov) 5145 { 5146 u64 type; 5147 u16 len, dlen; 5148 5149 len = sizeof(*buf); 5150 5151 switch ((type = mode_nfs_type(mode))) { 5152 case NFS_SPECFILE_BLK: 5153 case NFS_SPECFILE_CHR: 5154 dlen = sizeof(__le64); 5155 break; 5156 case NFS_SPECFILE_FIFO: 5157 case NFS_SPECFILE_SOCK: 5158 dlen = 0; 5159 break; 5160 default: 5161 return -EOPNOTSUPP; 5162 } 5163 5164 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS); 5165 buf->Reserved = 0; 5166 buf->InodeType = cpu_to_le64(type); 5167 buf->ReparseDataLength = cpu_to_le16(len + dlen - 5168 sizeof(struct reparse_data_buffer)); 5169 *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) | 5170 MINOR(dev)); 5171 iov->iov_base = buf; 5172 iov->iov_len = len + dlen; 5173 return 0; 5174 } 5175 5176 static int nfs_make_node(unsigned int xid, struct inode *inode, 5177 struct dentry *dentry, struct cifs_tcon *tcon, 5178 const char *full_path, umode_t mode, dev_t dev) 5179 { 5180 struct cifs_open_info_data data; 5181 struct reparse_posix_data *p; 5182 struct inode *new; 5183 struct kvec iov; 5184 __u8 buf[sizeof(*p) + sizeof(__le64)]; 5185 int rc; 5186 5187 p = (struct reparse_posix_data *)buf; 5188 rc = nfs_set_reparse_buf(p, mode, dev, &iov); 5189 if (rc) 5190 return rc; 5191 5192 data = (struct cifs_open_info_data) { 5193 .reparse_point = true, 5194 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, }, 5195 }; 5196 5197 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5198 tcon, full_path, &iov); 5199 if (!IS_ERR(new)) 5200 d_instantiate(dentry, new); 5201 else 5202 rc = PTR_ERR(new); 5203 cifs_free_open_info(&data); 5204 return rc; 5205 } 5206 5207 static int smb2_create_reparse_symlink(const unsigned int xid, 5208 struct inode *inode, 5209 struct dentry *dentry, 5210 struct cifs_tcon *tcon, 5211 const char *full_path, 5212 const char *symname) 5213 { 5214 struct reparse_symlink_data_buffer *buf = NULL; 5215 struct cifs_open_info_data data; 5216 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5217 struct inode *new; 5218 struct kvec iov; 5219 __le16 *path; 5220 char *sym, sep = CIFS_DIR_SEP(cifs_sb); 5221 u16 len, plen; 5222 int rc = 0; 5223 5224 sym = kstrdup(symname, GFP_KERNEL); 5225 if (!sym) 5226 return -ENOMEM; 5227 5228 data = (struct cifs_open_info_data) { 5229 .reparse_point = true, 5230 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, }, 5231 .symlink_target = sym, 5232 }; 5233 5234 convert_delimiter(sym, sep); 5235 path = cifs_convert_path_to_utf16(sym, cifs_sb); 5236 if (!path) { 5237 rc = -ENOMEM; 5238 goto out; 5239 } 5240 5241 plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX); 5242 len = sizeof(*buf) + plen * 2; 5243 buf = kzalloc(len, GFP_KERNEL); 5244 if (!buf) { 5245 rc = -ENOMEM; 5246 goto out; 5247 } 5248 5249 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK); 5250 buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer)); 5251 buf->SubstituteNameOffset = cpu_to_le16(plen); 5252 buf->SubstituteNameLength = cpu_to_le16(plen); 5253 memcpy(&buf->PathBuffer[plen], path, plen); 5254 buf->PrintNameOffset = 0; 5255 buf->PrintNameLength = cpu_to_le16(plen); 5256 memcpy(buf->PathBuffer, path, plen); 5257 buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0); 5258 if (*sym != sep) 5259 buf->Flags = cpu_to_le32(SYMLINK_FLAG_RELATIVE); 5260 5261 convert_delimiter(sym, '/'); 5262 iov.iov_base = buf; 5263 iov.iov_len = len; 5264 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5265 tcon, full_path, &iov); 5266 if (!IS_ERR(new)) 5267 d_instantiate(dentry, new); 5268 else 5269 rc = PTR_ERR(new); 5270 out: 5271 kfree(path); 5272 cifs_free_open_info(&data); 5273 kfree(buf); 5274 return rc; 5275 } 5276 5277 static int smb2_make_node(unsigned int xid, struct inode *inode, 5278 struct dentry *dentry, struct cifs_tcon *tcon, 5279 const char *full_path, umode_t mode, dev_t dev) 5280 { 5281 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5282 int rc; 5283 5284 /* 5285 * Check if mounted with mount parm 'sfu' mount parm. 5286 * SFU emulation should work with all servers, but only 5287 * supports block and char device (no socket & fifo), 5288 * and was used by default in earlier versions of Windows 5289 */ 5290 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5291 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5292 full_path, mode, dev); 5293 } else { 5294 rc = nfs_make_node(xid, inode, dentry, tcon, 5295 full_path, mode, dev); 5296 } 5297 return rc; 5298 } 5299 5300 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5301 struct smb_version_operations smb20_operations = { 5302 .compare_fids = smb2_compare_fids, 5303 .setup_request = smb2_setup_request, 5304 .setup_async_request = smb2_setup_async_request, 5305 .check_receive = smb2_check_receive, 5306 .add_credits = smb2_add_credits, 5307 .set_credits = smb2_set_credits, 5308 .get_credits_field = smb2_get_credits_field, 5309 .get_credits = smb2_get_credits, 5310 .wait_mtu_credits = cifs_wait_mtu_credits, 5311 .get_next_mid = smb2_get_next_mid, 5312 .revert_current_mid = smb2_revert_current_mid, 5313 .read_data_offset = smb2_read_data_offset, 5314 .read_data_length = smb2_read_data_length, 5315 .map_error = map_smb2_to_linux_error, 5316 .find_mid = smb2_find_mid, 5317 .check_message = smb2_check_message, 5318 .dump_detail = smb2_dump_detail, 5319 .clear_stats = smb2_clear_stats, 5320 .print_stats = smb2_print_stats, 5321 .is_oplock_break = smb2_is_valid_oplock_break, 5322 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5323 .downgrade_oplock = smb2_downgrade_oplock, 5324 .need_neg = smb2_need_neg, 5325 .negotiate = smb2_negotiate, 5326 .negotiate_wsize = smb2_negotiate_wsize, 5327 .negotiate_rsize = smb2_negotiate_rsize, 5328 .sess_setup = SMB2_sess_setup, 5329 .logoff = SMB2_logoff, 5330 .tree_connect = SMB2_tcon, 5331 .tree_disconnect = SMB2_tdis, 5332 .qfs_tcon = smb2_qfs_tcon, 5333 .is_path_accessible = smb2_is_path_accessible, 5334 .can_echo = smb2_can_echo, 5335 .echo = SMB2_echo, 5336 .query_path_info = smb2_query_path_info, 5337 .query_reparse_point = smb2_query_reparse_point, 5338 .get_srv_inum = smb2_get_srv_inum, 5339 .query_file_info = smb2_query_file_info, 5340 .set_path_size = smb2_set_path_size, 5341 .set_file_size = smb2_set_file_size, 5342 .set_file_info = smb2_set_file_info, 5343 .set_compression = smb2_set_compression, 5344 .mkdir = smb2_mkdir, 5345 .mkdir_setinfo = smb2_mkdir_setinfo, 5346 .rmdir = smb2_rmdir, 5347 .unlink = smb2_unlink, 5348 .rename = smb2_rename_path, 5349 .create_hardlink = smb2_create_hardlink, 5350 .parse_reparse_point = smb2_parse_reparse_point, 5351 .query_mf_symlink = smb3_query_mf_symlink, 5352 .create_mf_symlink = smb3_create_mf_symlink, 5353 .create_reparse_symlink = smb2_create_reparse_symlink, 5354 .open = smb2_open_file, 5355 .set_fid = smb2_set_fid, 5356 .close = smb2_close_file, 5357 .flush = smb2_flush_file, 5358 .async_readv = smb2_async_readv, 5359 .async_writev = smb2_async_writev, 5360 .sync_read = smb2_sync_read, 5361 .sync_write = smb2_sync_write, 5362 .query_dir_first = smb2_query_dir_first, 5363 .query_dir_next = smb2_query_dir_next, 5364 .close_dir = smb2_close_dir, 5365 .calc_smb_size = smb2_calc_size, 5366 .is_status_pending = smb2_is_status_pending, 5367 .is_session_expired = smb2_is_session_expired, 5368 .oplock_response = smb2_oplock_response, 5369 .queryfs = smb2_queryfs, 5370 .mand_lock = smb2_mand_lock, 5371 .mand_unlock_range = smb2_unlock_range, 5372 .push_mand_locks = smb2_push_mandatory_locks, 5373 .get_lease_key = smb2_get_lease_key, 5374 .set_lease_key = smb2_set_lease_key, 5375 .new_lease_key = smb2_new_lease_key, 5376 .calc_signature = smb2_calc_signature, 5377 .is_read_op = smb2_is_read_op, 5378 .set_oplock_level = smb2_set_oplock_level, 5379 .create_lease_buf = smb2_create_lease_buf, 5380 .parse_lease_buf = smb2_parse_lease_buf, 5381 .copychunk_range = smb2_copychunk_range, 5382 .wp_retry_size = smb2_wp_retry_size, 5383 .dir_needs_close = smb2_dir_needs_close, 5384 .get_dfs_refer = smb2_get_dfs_refer, 5385 .select_sectype = smb2_select_sectype, 5386 #ifdef CONFIG_CIFS_XATTR 5387 .query_all_EAs = smb2_query_eas, 5388 .set_EA = smb2_set_ea, 5389 #endif /* CIFS_XATTR */ 5390 .get_acl = get_smb2_acl, 5391 .get_acl_by_fid = get_smb2_acl_by_fid, 5392 .set_acl = set_smb2_acl, 5393 .next_header = smb2_next_header, 5394 .ioctl_query_info = smb2_ioctl_query_info, 5395 .make_node = smb2_make_node, 5396 .fiemap = smb3_fiemap, 5397 .llseek = smb3_llseek, 5398 .is_status_io_timeout = smb2_is_status_io_timeout, 5399 .is_network_name_deleted = smb2_is_network_name_deleted, 5400 }; 5401 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5402 5403 struct smb_version_operations smb21_operations = { 5404 .compare_fids = smb2_compare_fids, 5405 .setup_request = smb2_setup_request, 5406 .setup_async_request = smb2_setup_async_request, 5407 .check_receive = smb2_check_receive, 5408 .add_credits = smb2_add_credits, 5409 .set_credits = smb2_set_credits, 5410 .get_credits_field = smb2_get_credits_field, 5411 .get_credits = smb2_get_credits, 5412 .wait_mtu_credits = smb2_wait_mtu_credits, 5413 .adjust_credits = smb2_adjust_credits, 5414 .get_next_mid = smb2_get_next_mid, 5415 .revert_current_mid = smb2_revert_current_mid, 5416 .read_data_offset = smb2_read_data_offset, 5417 .read_data_length = smb2_read_data_length, 5418 .map_error = map_smb2_to_linux_error, 5419 .find_mid = smb2_find_mid, 5420 .check_message = smb2_check_message, 5421 .dump_detail = smb2_dump_detail, 5422 .clear_stats = smb2_clear_stats, 5423 .print_stats = smb2_print_stats, 5424 .is_oplock_break = smb2_is_valid_oplock_break, 5425 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5426 .downgrade_oplock = smb2_downgrade_oplock, 5427 .need_neg = smb2_need_neg, 5428 .negotiate = smb2_negotiate, 5429 .negotiate_wsize = smb2_negotiate_wsize, 5430 .negotiate_rsize = smb2_negotiate_rsize, 5431 .sess_setup = SMB2_sess_setup, 5432 .logoff = SMB2_logoff, 5433 .tree_connect = SMB2_tcon, 5434 .tree_disconnect = SMB2_tdis, 5435 .qfs_tcon = smb2_qfs_tcon, 5436 .is_path_accessible = smb2_is_path_accessible, 5437 .can_echo = smb2_can_echo, 5438 .echo = SMB2_echo, 5439 .query_path_info = smb2_query_path_info, 5440 .query_reparse_point = smb2_query_reparse_point, 5441 .get_srv_inum = smb2_get_srv_inum, 5442 .query_file_info = smb2_query_file_info, 5443 .set_path_size = smb2_set_path_size, 5444 .set_file_size = smb2_set_file_size, 5445 .set_file_info = smb2_set_file_info, 5446 .set_compression = smb2_set_compression, 5447 .mkdir = smb2_mkdir, 5448 .mkdir_setinfo = smb2_mkdir_setinfo, 5449 .rmdir = smb2_rmdir, 5450 .unlink = smb2_unlink, 5451 .rename = smb2_rename_path, 5452 .create_hardlink = smb2_create_hardlink, 5453 .parse_reparse_point = smb2_parse_reparse_point, 5454 .query_mf_symlink = smb3_query_mf_symlink, 5455 .create_mf_symlink = smb3_create_mf_symlink, 5456 .create_reparse_symlink = smb2_create_reparse_symlink, 5457 .open = smb2_open_file, 5458 .set_fid = smb2_set_fid, 5459 .close = smb2_close_file, 5460 .flush = smb2_flush_file, 5461 .async_readv = smb2_async_readv, 5462 .async_writev = smb2_async_writev, 5463 .sync_read = smb2_sync_read, 5464 .sync_write = smb2_sync_write, 5465 .query_dir_first = smb2_query_dir_first, 5466 .query_dir_next = smb2_query_dir_next, 5467 .close_dir = smb2_close_dir, 5468 .calc_smb_size = smb2_calc_size, 5469 .is_status_pending = smb2_is_status_pending, 5470 .is_session_expired = smb2_is_session_expired, 5471 .oplock_response = smb2_oplock_response, 5472 .queryfs = smb2_queryfs, 5473 .mand_lock = smb2_mand_lock, 5474 .mand_unlock_range = smb2_unlock_range, 5475 .push_mand_locks = smb2_push_mandatory_locks, 5476 .get_lease_key = smb2_get_lease_key, 5477 .set_lease_key = smb2_set_lease_key, 5478 .new_lease_key = smb2_new_lease_key, 5479 .calc_signature = smb2_calc_signature, 5480 .is_read_op = smb21_is_read_op, 5481 .set_oplock_level = smb21_set_oplock_level, 5482 .create_lease_buf = smb2_create_lease_buf, 5483 .parse_lease_buf = smb2_parse_lease_buf, 5484 .copychunk_range = smb2_copychunk_range, 5485 .wp_retry_size = smb2_wp_retry_size, 5486 .dir_needs_close = smb2_dir_needs_close, 5487 .enum_snapshots = smb3_enum_snapshots, 5488 .notify = smb3_notify, 5489 .get_dfs_refer = smb2_get_dfs_refer, 5490 .select_sectype = smb2_select_sectype, 5491 #ifdef CONFIG_CIFS_XATTR 5492 .query_all_EAs = smb2_query_eas, 5493 .set_EA = smb2_set_ea, 5494 #endif /* CIFS_XATTR */ 5495 .get_acl = get_smb2_acl, 5496 .get_acl_by_fid = get_smb2_acl_by_fid, 5497 .set_acl = set_smb2_acl, 5498 .next_header = smb2_next_header, 5499 .ioctl_query_info = smb2_ioctl_query_info, 5500 .make_node = smb2_make_node, 5501 .fiemap = smb3_fiemap, 5502 .llseek = smb3_llseek, 5503 .is_status_io_timeout = smb2_is_status_io_timeout, 5504 .is_network_name_deleted = smb2_is_network_name_deleted, 5505 }; 5506 5507 struct smb_version_operations smb30_operations = { 5508 .compare_fids = smb2_compare_fids, 5509 .setup_request = smb2_setup_request, 5510 .setup_async_request = smb2_setup_async_request, 5511 .check_receive = smb2_check_receive, 5512 .add_credits = smb2_add_credits, 5513 .set_credits = smb2_set_credits, 5514 .get_credits_field = smb2_get_credits_field, 5515 .get_credits = smb2_get_credits, 5516 .wait_mtu_credits = smb2_wait_mtu_credits, 5517 .adjust_credits = smb2_adjust_credits, 5518 .get_next_mid = smb2_get_next_mid, 5519 .revert_current_mid = smb2_revert_current_mid, 5520 .read_data_offset = smb2_read_data_offset, 5521 .read_data_length = smb2_read_data_length, 5522 .map_error = map_smb2_to_linux_error, 5523 .find_mid = smb2_find_mid, 5524 .check_message = smb2_check_message, 5525 .dump_detail = smb2_dump_detail, 5526 .clear_stats = smb2_clear_stats, 5527 .print_stats = smb2_print_stats, 5528 .dump_share_caps = smb2_dump_share_caps, 5529 .is_oplock_break = smb2_is_valid_oplock_break, 5530 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5531 .downgrade_oplock = smb3_downgrade_oplock, 5532 .need_neg = smb2_need_neg, 5533 .negotiate = smb2_negotiate, 5534 .negotiate_wsize = smb3_negotiate_wsize, 5535 .negotiate_rsize = smb3_negotiate_rsize, 5536 .sess_setup = SMB2_sess_setup, 5537 .logoff = SMB2_logoff, 5538 .tree_connect = SMB2_tcon, 5539 .tree_disconnect = SMB2_tdis, 5540 .qfs_tcon = smb3_qfs_tcon, 5541 .is_path_accessible = smb2_is_path_accessible, 5542 .can_echo = smb2_can_echo, 5543 .echo = SMB2_echo, 5544 .query_path_info = smb2_query_path_info, 5545 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5546 .query_reparse_point = smb2_query_reparse_point, 5547 .get_srv_inum = smb2_get_srv_inum, 5548 .query_file_info = smb2_query_file_info, 5549 .set_path_size = smb2_set_path_size, 5550 .set_file_size = smb2_set_file_size, 5551 .set_file_info = smb2_set_file_info, 5552 .set_compression = smb2_set_compression, 5553 .mkdir = smb2_mkdir, 5554 .mkdir_setinfo = smb2_mkdir_setinfo, 5555 .rmdir = smb2_rmdir, 5556 .unlink = smb2_unlink, 5557 .rename = smb2_rename_path, 5558 .create_hardlink = smb2_create_hardlink, 5559 .parse_reparse_point = smb2_parse_reparse_point, 5560 .query_mf_symlink = smb3_query_mf_symlink, 5561 .create_mf_symlink = smb3_create_mf_symlink, 5562 .create_reparse_symlink = smb2_create_reparse_symlink, 5563 .open = smb2_open_file, 5564 .set_fid = smb2_set_fid, 5565 .close = smb2_close_file, 5566 .close_getattr = smb2_close_getattr, 5567 .flush = smb2_flush_file, 5568 .async_readv = smb2_async_readv, 5569 .async_writev = smb2_async_writev, 5570 .sync_read = smb2_sync_read, 5571 .sync_write = smb2_sync_write, 5572 .query_dir_first = smb2_query_dir_first, 5573 .query_dir_next = smb2_query_dir_next, 5574 .close_dir = smb2_close_dir, 5575 .calc_smb_size = smb2_calc_size, 5576 .is_status_pending = smb2_is_status_pending, 5577 .is_session_expired = smb2_is_session_expired, 5578 .oplock_response = smb2_oplock_response, 5579 .queryfs = smb2_queryfs, 5580 .mand_lock = smb2_mand_lock, 5581 .mand_unlock_range = smb2_unlock_range, 5582 .push_mand_locks = smb2_push_mandatory_locks, 5583 .get_lease_key = smb2_get_lease_key, 5584 .set_lease_key = smb2_set_lease_key, 5585 .new_lease_key = smb2_new_lease_key, 5586 .generate_signingkey = generate_smb30signingkey, 5587 .calc_signature = smb3_calc_signature, 5588 .set_integrity = smb3_set_integrity, 5589 .is_read_op = smb21_is_read_op, 5590 .set_oplock_level = smb3_set_oplock_level, 5591 .create_lease_buf = smb3_create_lease_buf, 5592 .parse_lease_buf = smb3_parse_lease_buf, 5593 .copychunk_range = smb2_copychunk_range, 5594 .duplicate_extents = smb2_duplicate_extents, 5595 .validate_negotiate = smb3_validate_negotiate, 5596 .wp_retry_size = smb2_wp_retry_size, 5597 .dir_needs_close = smb2_dir_needs_close, 5598 .fallocate = smb3_fallocate, 5599 .enum_snapshots = smb3_enum_snapshots, 5600 .notify = smb3_notify, 5601 .init_transform_rq = smb3_init_transform_rq, 5602 .is_transform_hdr = smb3_is_transform_hdr, 5603 .receive_transform = smb3_receive_transform, 5604 .get_dfs_refer = smb2_get_dfs_refer, 5605 .select_sectype = smb2_select_sectype, 5606 #ifdef CONFIG_CIFS_XATTR 5607 .query_all_EAs = smb2_query_eas, 5608 .set_EA = smb2_set_ea, 5609 #endif /* CIFS_XATTR */ 5610 .get_acl = get_smb2_acl, 5611 .get_acl_by_fid = get_smb2_acl_by_fid, 5612 .set_acl = set_smb2_acl, 5613 .next_header = smb2_next_header, 5614 .ioctl_query_info = smb2_ioctl_query_info, 5615 .make_node = smb2_make_node, 5616 .fiemap = smb3_fiemap, 5617 .llseek = smb3_llseek, 5618 .is_status_io_timeout = smb2_is_status_io_timeout, 5619 .is_network_name_deleted = smb2_is_network_name_deleted, 5620 }; 5621 5622 struct smb_version_operations smb311_operations = { 5623 .compare_fids = smb2_compare_fids, 5624 .setup_request = smb2_setup_request, 5625 .setup_async_request = smb2_setup_async_request, 5626 .check_receive = smb2_check_receive, 5627 .add_credits = smb2_add_credits, 5628 .set_credits = smb2_set_credits, 5629 .get_credits_field = smb2_get_credits_field, 5630 .get_credits = smb2_get_credits, 5631 .wait_mtu_credits = smb2_wait_mtu_credits, 5632 .adjust_credits = smb2_adjust_credits, 5633 .get_next_mid = smb2_get_next_mid, 5634 .revert_current_mid = smb2_revert_current_mid, 5635 .read_data_offset = smb2_read_data_offset, 5636 .read_data_length = smb2_read_data_length, 5637 .map_error = map_smb2_to_linux_error, 5638 .find_mid = smb2_find_mid, 5639 .check_message = smb2_check_message, 5640 .dump_detail = smb2_dump_detail, 5641 .clear_stats = smb2_clear_stats, 5642 .print_stats = smb2_print_stats, 5643 .dump_share_caps = smb2_dump_share_caps, 5644 .is_oplock_break = smb2_is_valid_oplock_break, 5645 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5646 .downgrade_oplock = smb3_downgrade_oplock, 5647 .need_neg = smb2_need_neg, 5648 .negotiate = smb2_negotiate, 5649 .negotiate_wsize = smb3_negotiate_wsize, 5650 .negotiate_rsize = smb3_negotiate_rsize, 5651 .sess_setup = SMB2_sess_setup, 5652 .logoff = SMB2_logoff, 5653 .tree_connect = SMB2_tcon, 5654 .tree_disconnect = SMB2_tdis, 5655 .qfs_tcon = smb3_qfs_tcon, 5656 .is_path_accessible = smb2_is_path_accessible, 5657 .can_echo = smb2_can_echo, 5658 .echo = SMB2_echo, 5659 .query_path_info = smb2_query_path_info, 5660 .query_reparse_point = smb2_query_reparse_point, 5661 .get_srv_inum = smb2_get_srv_inum, 5662 .query_file_info = smb2_query_file_info, 5663 .set_path_size = smb2_set_path_size, 5664 .set_file_size = smb2_set_file_size, 5665 .set_file_info = smb2_set_file_info, 5666 .set_compression = smb2_set_compression, 5667 .mkdir = smb2_mkdir, 5668 .mkdir_setinfo = smb2_mkdir_setinfo, 5669 .posix_mkdir = smb311_posix_mkdir, 5670 .rmdir = smb2_rmdir, 5671 .unlink = smb2_unlink, 5672 .rename = smb2_rename_path, 5673 .create_hardlink = smb2_create_hardlink, 5674 .parse_reparse_point = smb2_parse_reparse_point, 5675 .query_mf_symlink = smb3_query_mf_symlink, 5676 .create_mf_symlink = smb3_create_mf_symlink, 5677 .create_reparse_symlink = smb2_create_reparse_symlink, 5678 .open = smb2_open_file, 5679 .set_fid = smb2_set_fid, 5680 .close = smb2_close_file, 5681 .close_getattr = smb2_close_getattr, 5682 .flush = smb2_flush_file, 5683 .async_readv = smb2_async_readv, 5684 .async_writev = smb2_async_writev, 5685 .sync_read = smb2_sync_read, 5686 .sync_write = smb2_sync_write, 5687 .query_dir_first = smb2_query_dir_first, 5688 .query_dir_next = smb2_query_dir_next, 5689 .close_dir = smb2_close_dir, 5690 .calc_smb_size = smb2_calc_size, 5691 .is_status_pending = smb2_is_status_pending, 5692 .is_session_expired = smb2_is_session_expired, 5693 .oplock_response = smb2_oplock_response, 5694 .queryfs = smb311_queryfs, 5695 .mand_lock = smb2_mand_lock, 5696 .mand_unlock_range = smb2_unlock_range, 5697 .push_mand_locks = smb2_push_mandatory_locks, 5698 .get_lease_key = smb2_get_lease_key, 5699 .set_lease_key = smb2_set_lease_key, 5700 .new_lease_key = smb2_new_lease_key, 5701 .generate_signingkey = generate_smb311signingkey, 5702 .calc_signature = smb3_calc_signature, 5703 .set_integrity = smb3_set_integrity, 5704 .is_read_op = smb21_is_read_op, 5705 .set_oplock_level = smb3_set_oplock_level, 5706 .create_lease_buf = smb3_create_lease_buf, 5707 .parse_lease_buf = smb3_parse_lease_buf, 5708 .copychunk_range = smb2_copychunk_range, 5709 .duplicate_extents = smb2_duplicate_extents, 5710 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5711 .wp_retry_size = smb2_wp_retry_size, 5712 .dir_needs_close = smb2_dir_needs_close, 5713 .fallocate = smb3_fallocate, 5714 .enum_snapshots = smb3_enum_snapshots, 5715 .notify = smb3_notify, 5716 .init_transform_rq = smb3_init_transform_rq, 5717 .is_transform_hdr = smb3_is_transform_hdr, 5718 .receive_transform = smb3_receive_transform, 5719 .get_dfs_refer = smb2_get_dfs_refer, 5720 .select_sectype = smb2_select_sectype, 5721 #ifdef CONFIG_CIFS_XATTR 5722 .query_all_EAs = smb2_query_eas, 5723 .set_EA = smb2_set_ea, 5724 #endif /* CIFS_XATTR */ 5725 .get_acl = get_smb2_acl, 5726 .get_acl_by_fid = get_smb2_acl_by_fid, 5727 .set_acl = set_smb2_acl, 5728 .next_header = smb2_next_header, 5729 .ioctl_query_info = smb2_ioctl_query_info, 5730 .make_node = smb2_make_node, 5731 .fiemap = smb3_fiemap, 5732 .llseek = smb3_llseek, 5733 .is_status_io_timeout = smb2_is_status_io_timeout, 5734 .is_network_name_deleted = smb2_is_network_name_deleted, 5735 }; 5736 5737 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5738 struct smb_version_values smb20_values = { 5739 .version_string = SMB20_VERSION_STRING, 5740 .protocol_id = SMB20_PROT_ID, 5741 .req_capabilities = 0, /* MBZ */ 5742 .large_lock_type = 0, 5743 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5744 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5745 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5746 .header_size = sizeof(struct smb2_hdr), 5747 .header_preamble_size = 0, 5748 .max_header_size = MAX_SMB2_HDR_SIZE, 5749 .read_rsp_size = sizeof(struct smb2_read_rsp), 5750 .lock_cmd = SMB2_LOCK, 5751 .cap_unix = 0, 5752 .cap_nt_find = SMB2_NT_FIND, 5753 .cap_large_files = SMB2_LARGE_FILES, 5754 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5755 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5756 .create_lease_size = sizeof(struct create_lease), 5757 }; 5758 #endif /* ALLOW_INSECURE_LEGACY */ 5759 5760 struct smb_version_values smb21_values = { 5761 .version_string = SMB21_VERSION_STRING, 5762 .protocol_id = SMB21_PROT_ID, 5763 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5764 .large_lock_type = 0, 5765 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5766 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5767 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5768 .header_size = sizeof(struct smb2_hdr), 5769 .header_preamble_size = 0, 5770 .max_header_size = MAX_SMB2_HDR_SIZE, 5771 .read_rsp_size = sizeof(struct smb2_read_rsp), 5772 .lock_cmd = SMB2_LOCK, 5773 .cap_unix = 0, 5774 .cap_nt_find = SMB2_NT_FIND, 5775 .cap_large_files = SMB2_LARGE_FILES, 5776 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5777 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5778 .create_lease_size = sizeof(struct create_lease), 5779 }; 5780 5781 struct smb_version_values smb3any_values = { 5782 .version_string = SMB3ANY_VERSION_STRING, 5783 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5784 .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, 5785 .large_lock_type = 0, 5786 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5787 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5788 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5789 .header_size = sizeof(struct smb2_hdr), 5790 .header_preamble_size = 0, 5791 .max_header_size = MAX_SMB2_HDR_SIZE, 5792 .read_rsp_size = sizeof(struct smb2_read_rsp), 5793 .lock_cmd = SMB2_LOCK, 5794 .cap_unix = 0, 5795 .cap_nt_find = SMB2_NT_FIND, 5796 .cap_large_files = SMB2_LARGE_FILES, 5797 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5798 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5799 .create_lease_size = sizeof(struct create_lease_v2), 5800 }; 5801 5802 struct smb_version_values smbdefault_values = { 5803 .version_string = SMBDEFAULT_VERSION_STRING, 5804 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5805 .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, 5806 .large_lock_type = 0, 5807 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5808 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5809 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5810 .header_size = sizeof(struct smb2_hdr), 5811 .header_preamble_size = 0, 5812 .max_header_size = MAX_SMB2_HDR_SIZE, 5813 .read_rsp_size = sizeof(struct smb2_read_rsp), 5814 .lock_cmd = SMB2_LOCK, 5815 .cap_unix = 0, 5816 .cap_nt_find = SMB2_NT_FIND, 5817 .cap_large_files = SMB2_LARGE_FILES, 5818 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5819 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5820 .create_lease_size = sizeof(struct create_lease_v2), 5821 }; 5822 5823 struct smb_version_values smb30_values = { 5824 .version_string = SMB30_VERSION_STRING, 5825 .protocol_id = SMB30_PROT_ID, 5826 .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, 5827 .large_lock_type = 0, 5828 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5829 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5830 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5831 .header_size = sizeof(struct smb2_hdr), 5832 .header_preamble_size = 0, 5833 .max_header_size = MAX_SMB2_HDR_SIZE, 5834 .read_rsp_size = sizeof(struct smb2_read_rsp), 5835 .lock_cmd = SMB2_LOCK, 5836 .cap_unix = 0, 5837 .cap_nt_find = SMB2_NT_FIND, 5838 .cap_large_files = SMB2_LARGE_FILES, 5839 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5840 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5841 .create_lease_size = sizeof(struct create_lease_v2), 5842 }; 5843 5844 struct smb_version_values smb302_values = { 5845 .version_string = SMB302_VERSION_STRING, 5846 .protocol_id = SMB302_PROT_ID, 5847 .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, 5848 .large_lock_type = 0, 5849 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5850 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5851 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5852 .header_size = sizeof(struct smb2_hdr), 5853 .header_preamble_size = 0, 5854 .max_header_size = MAX_SMB2_HDR_SIZE, 5855 .read_rsp_size = sizeof(struct smb2_read_rsp), 5856 .lock_cmd = SMB2_LOCK, 5857 .cap_unix = 0, 5858 .cap_nt_find = SMB2_NT_FIND, 5859 .cap_large_files = SMB2_LARGE_FILES, 5860 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5861 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5862 .create_lease_size = sizeof(struct create_lease_v2), 5863 }; 5864 5865 struct smb_version_values smb311_values = { 5866 .version_string = SMB311_VERSION_STRING, 5867 .protocol_id = SMB311_PROT_ID, 5868 .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, 5869 .large_lock_type = 0, 5870 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5871 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5872 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5873 .header_size = sizeof(struct smb2_hdr), 5874 .header_preamble_size = 0, 5875 .max_header_size = MAX_SMB2_HDR_SIZE, 5876 .read_rsp_size = sizeof(struct smb2_read_rsp), 5877 .lock_cmd = SMB2_LOCK, 5878 .cap_unix = 0, 5879 .cap_nt_find = SMB2_NT_FIND, 5880 .cap_large_files = SMB2_LARGE_FILES, 5881 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5882 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5883 .create_lease_size = sizeof(struct create_lease_v2), 5884 }; 5885