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