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 } 113 scredits = *val; 114 in_flight = server->in_flight; 115 spin_unlock(&server->req_lock); 116 wake_up(&server->request_q); 117 118 if (reconnect_detected) { 119 trace_smb3_reconnect_detected(server->CurrentMid, 120 server->conn_id, server->hostname, scredits, add, in_flight); 121 122 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 123 add, instance); 124 } 125 126 if (reconnect_with_invalid_credits) { 127 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 128 server->conn_id, server->hostname, scredits, add, in_flight); 129 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 130 optype, scredits, add); 131 } 132 133 spin_lock(&server->srv_lock); 134 if (server->tcpStatus == CifsNeedReconnect 135 || server->tcpStatus == CifsExiting) { 136 spin_unlock(&server->srv_lock); 137 return; 138 } 139 spin_unlock(&server->srv_lock); 140 141 switch (rc) { 142 case -1: 143 /* change_conf hasn't been executed */ 144 break; 145 case 0: 146 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 147 break; 148 case 1: 149 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 150 break; 151 case 2: 152 cifs_dbg(FYI, "disabling oplocks\n"); 153 break; 154 default: 155 /* change_conf rebalanced credits for different types */ 156 break; 157 } 158 159 trace_smb3_add_credits(server->CurrentMid, 160 server->conn_id, server->hostname, scredits, add, in_flight); 161 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 162 } 163 164 static void 165 smb2_set_credits(struct TCP_Server_Info *server, const int val) 166 { 167 int scredits, in_flight; 168 169 spin_lock(&server->req_lock); 170 server->credits = val; 171 if (val == 1) 172 server->reconnect_instance++; 173 scredits = server->credits; 174 in_flight = server->in_flight; 175 spin_unlock(&server->req_lock); 176 177 trace_smb3_set_credits(server->CurrentMid, 178 server->conn_id, server->hostname, scredits, val, in_flight); 179 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 180 181 /* don't log while holding the lock */ 182 if (val == 1) 183 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 184 } 185 186 static int * 187 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 188 { 189 switch (optype) { 190 case CIFS_ECHO_OP: 191 return &server->echo_credits; 192 case CIFS_OBREAK_OP: 193 return &server->oplock_credits; 194 default: 195 return &server->credits; 196 } 197 } 198 199 static unsigned int 200 smb2_get_credits(struct mid_q_entry *mid) 201 { 202 return mid->credits_received; 203 } 204 205 static int 206 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 207 unsigned int *num, struct cifs_credits *credits) 208 { 209 int rc = 0; 210 unsigned int scredits, in_flight; 211 212 spin_lock(&server->req_lock); 213 while (1) { 214 if (server->credits <= 0) { 215 spin_unlock(&server->req_lock); 216 cifs_num_waiters_inc(server); 217 rc = wait_event_killable(server->request_q, 218 has_credits(server, &server->credits, 1)); 219 cifs_num_waiters_dec(server); 220 if (rc) 221 return rc; 222 spin_lock(&server->req_lock); 223 } else { 224 spin_unlock(&server->req_lock); 225 spin_lock(&server->srv_lock); 226 if (server->tcpStatus == CifsExiting) { 227 spin_unlock(&server->srv_lock); 228 return -ENOENT; 229 } 230 spin_unlock(&server->srv_lock); 231 232 spin_lock(&server->req_lock); 233 scredits = server->credits; 234 /* can deadlock with reopen */ 235 if (scredits <= 8) { 236 *num = SMB2_MAX_BUFFER_SIZE; 237 credits->value = 0; 238 credits->instance = 0; 239 break; 240 } 241 242 /* leave some credits for reopen and other ops */ 243 scredits -= 8; 244 *num = min_t(unsigned int, size, 245 scredits * SMB2_MAX_BUFFER_SIZE); 246 247 credits->value = 248 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 249 credits->instance = server->reconnect_instance; 250 server->credits -= credits->value; 251 server->in_flight++; 252 if (server->in_flight > server->max_in_flight) 253 server->max_in_flight = server->in_flight; 254 break; 255 } 256 } 257 scredits = server->credits; 258 in_flight = server->in_flight; 259 spin_unlock(&server->req_lock); 260 261 trace_smb3_wait_credits(server->CurrentMid, 262 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 263 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 264 __func__, credits->value, scredits); 265 266 return rc; 267 } 268 269 static int 270 smb2_adjust_credits(struct TCP_Server_Info *server, 271 struct cifs_credits *credits, 272 const unsigned int payload_size) 273 { 274 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 275 int scredits, in_flight; 276 277 if (!credits->value || credits->value == new_val) 278 return 0; 279 280 if (credits->value < new_val) { 281 trace_smb3_too_many_credits(server->CurrentMid, 282 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 283 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 284 credits->value, new_val); 285 286 return -ENOTSUPP; 287 } 288 289 spin_lock(&server->req_lock); 290 291 if (server->reconnect_instance != credits->instance) { 292 scredits = server->credits; 293 in_flight = server->in_flight; 294 spin_unlock(&server->req_lock); 295 296 trace_smb3_reconnect_detected(server->CurrentMid, 297 server->conn_id, server->hostname, scredits, 298 credits->value - new_val, in_flight); 299 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 300 credits->value - new_val); 301 return -EAGAIN; 302 } 303 304 server->credits += credits->value - new_val; 305 scredits = server->credits; 306 in_flight = server->in_flight; 307 spin_unlock(&server->req_lock); 308 wake_up(&server->request_q); 309 310 trace_smb3_adj_credits(server->CurrentMid, 311 server->conn_id, server->hostname, scredits, 312 credits->value - new_val, in_flight); 313 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 314 __func__, credits->value - new_val, scredits); 315 316 credits->value = new_val; 317 318 return 0; 319 } 320 321 static __u64 322 smb2_get_next_mid(struct TCP_Server_Info *server) 323 { 324 __u64 mid; 325 /* for SMB2 we need the current value */ 326 spin_lock(&server->mid_lock); 327 mid = server->CurrentMid++; 328 spin_unlock(&server->mid_lock); 329 return mid; 330 } 331 332 static void 333 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 334 { 335 spin_lock(&server->mid_lock); 336 if (server->CurrentMid >= val) 337 server->CurrentMid -= val; 338 spin_unlock(&server->mid_lock); 339 } 340 341 static struct mid_q_entry * 342 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 343 { 344 struct mid_q_entry *mid; 345 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 346 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 347 348 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 349 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 350 return NULL; 351 } 352 353 spin_lock(&server->mid_lock); 354 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 355 if ((mid->mid == wire_mid) && 356 (mid->mid_state == MID_REQUEST_SUBMITTED) && 357 (mid->command == shdr->Command)) { 358 kref_get(&mid->refcount); 359 if (dequeue) { 360 list_del_init(&mid->qhead); 361 mid->mid_flags |= MID_DELETED; 362 } 363 spin_unlock(&server->mid_lock); 364 return mid; 365 } 366 } 367 spin_unlock(&server->mid_lock); 368 return NULL; 369 } 370 371 static struct mid_q_entry * 372 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 373 { 374 return __smb2_find_mid(server, buf, false); 375 } 376 377 static struct mid_q_entry * 378 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 379 { 380 return __smb2_find_mid(server, buf, true); 381 } 382 383 static void 384 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 385 { 386 #ifdef CONFIG_CIFS_DEBUG2 387 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 388 389 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 390 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 391 shdr->Id.SyncId.ProcessId); 392 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 393 server->ops->calc_smb_size(buf)); 394 #endif 395 } 396 397 static bool 398 smb2_need_neg(struct TCP_Server_Info *server) 399 { 400 return server->max_read == 0; 401 } 402 403 static int 404 smb2_negotiate(const unsigned int xid, 405 struct cifs_ses *ses, 406 struct TCP_Server_Info *server) 407 { 408 int rc; 409 410 spin_lock(&server->mid_lock); 411 server->CurrentMid = 0; 412 spin_unlock(&server->mid_lock); 413 rc = SMB2_negotiate(xid, ses, server); 414 /* BB we probably don't need to retry with modern servers */ 415 if (rc == -EAGAIN) 416 rc = -EHOSTDOWN; 417 return rc; 418 } 419 420 static unsigned int 421 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 422 { 423 struct TCP_Server_Info *server = tcon->ses->server; 424 unsigned int wsize; 425 426 /* start with specified wsize, or default */ 427 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 428 wsize = min_t(unsigned int, wsize, server->max_write); 429 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 430 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 431 432 return wsize; 433 } 434 435 static unsigned int 436 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 437 { 438 struct TCP_Server_Info *server = tcon->ses->server; 439 unsigned int wsize; 440 441 /* start with specified wsize, or default */ 442 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 443 wsize = min_t(unsigned int, wsize, server->max_write); 444 #ifdef CONFIG_CIFS_SMB_DIRECT 445 if (server->rdma) { 446 if (server->sign) 447 /* 448 * Account for SMB2 data transfer packet header and 449 * possible encryption header 450 */ 451 wsize = min_t(unsigned int, 452 wsize, 453 server->smbd_conn->max_fragmented_send_size - 454 SMB2_READWRITE_PDU_HEADER_SIZE - 455 sizeof(struct smb2_transform_hdr)); 456 else 457 wsize = min_t(unsigned int, 458 wsize, server->smbd_conn->max_readwrite_size); 459 } 460 #endif 461 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 462 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 463 464 return wsize; 465 } 466 467 static unsigned int 468 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 469 { 470 struct TCP_Server_Info *server = tcon->ses->server; 471 unsigned int rsize; 472 473 /* start with specified rsize, or default */ 474 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 475 rsize = min_t(unsigned int, rsize, server->max_read); 476 477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 478 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 479 480 return rsize; 481 } 482 483 static unsigned int 484 smb3_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 : SMB3_DEFAULT_IOSIZE; 491 rsize = min_t(unsigned int, rsize, server->max_read); 492 #ifdef CONFIG_CIFS_SMB_DIRECT 493 if (server->rdma) { 494 if (server->sign) 495 /* 496 * Account for SMB2 data transfer packet header and 497 * possible encryption header 498 */ 499 rsize = min_t(unsigned int, 500 rsize, 501 server->smbd_conn->max_fragmented_recv_size - 502 SMB2_READWRITE_PDU_HEADER_SIZE - 503 sizeof(struct smb2_transform_hdr)); 504 else 505 rsize = min_t(unsigned int, 506 rsize, server->smbd_conn->max_readwrite_size); 507 } 508 #endif 509 510 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 511 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 512 513 return rsize; 514 } 515 516 /* 517 * compare two interfaces a and b 518 * return 0 if everything matches. 519 * return 1 if a is rdma capable, or rss capable, or has higher link speed 520 * return -1 otherwise. 521 */ 522 static int 523 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 524 { 525 int cmp_ret = 0; 526 527 WARN_ON(!a || !b); 528 if (a->rdma_capable == b->rdma_capable) { 529 if (a->rss_capable == b->rss_capable) { 530 if (a->speed == b->speed) { 531 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 532 (struct sockaddr *) &b->sockaddr); 533 if (!cmp_ret) 534 return 0; 535 else if (cmp_ret > 0) 536 return 1; 537 else 538 return -1; 539 } else if (a->speed > b->speed) 540 return 1; 541 else 542 return -1; 543 } else if (a->rss_capable > b->rss_capable) 544 return 1; 545 else 546 return -1; 547 } else if (a->rdma_capable > b->rdma_capable) 548 return 1; 549 else 550 return -1; 551 } 552 553 static int 554 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 555 size_t buf_len, struct cifs_ses *ses, bool in_mount) 556 { 557 struct network_interface_info_ioctl_rsp *p; 558 struct sockaddr_in *addr4; 559 struct sockaddr_in6 *addr6; 560 struct iface_info_ipv4 *p4; 561 struct iface_info_ipv6 *p6; 562 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 563 struct cifs_server_iface tmp_iface; 564 ssize_t bytes_left; 565 size_t next = 0; 566 int nb_iface = 0; 567 int rc = 0, ret = 0; 568 569 bytes_left = buf_len; 570 p = buf; 571 572 spin_lock(&ses->iface_lock); 573 /* do not query too frequently, this time with lock held */ 574 if (ses->iface_last_update && 575 time_before(jiffies, ses->iface_last_update + 576 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 577 spin_unlock(&ses->iface_lock); 578 return 0; 579 } 580 581 /* 582 * Go through iface_list and do kref_put to remove 583 * any unused ifaces. ifaces in use will be removed 584 * when the last user calls a kref_put on it 585 */ 586 list_for_each_entry_safe(iface, niface, &ses->iface_list, 587 iface_head) { 588 iface->is_active = 0; 589 kref_put(&iface->refcount, release_iface); 590 ses->iface_count--; 591 } 592 spin_unlock(&ses->iface_lock); 593 594 /* 595 * Samba server e.g. can return an empty interface list in some cases, 596 * which would only be a problem if we were requesting multichannel 597 */ 598 if (bytes_left == 0) { 599 /* avoid spamming logs every 10 minutes, so log only in mount */ 600 if ((ses->chan_max > 1) && in_mount) 601 cifs_dbg(VFS, 602 "multichannel not available\n" 603 "Empty network interface list returned by server %s\n", 604 ses->server->hostname); 605 rc = -EINVAL; 606 goto out; 607 } 608 609 while (bytes_left >= sizeof(*p)) { 610 memset(&tmp_iface, 0, sizeof(tmp_iface)); 611 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 612 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 613 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 614 615 switch (p->Family) { 616 /* 617 * The kernel and wire socket structures have the same 618 * layout and use network byte order but make the 619 * conversion explicit in case either one changes. 620 */ 621 case INTERNETWORK: 622 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 623 p4 = (struct iface_info_ipv4 *)p->Buffer; 624 addr4->sin_family = AF_INET; 625 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 626 627 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 628 addr4->sin_port = cpu_to_be16(CIFS_PORT); 629 630 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 631 &addr4->sin_addr); 632 break; 633 case INTERNETWORKV6: 634 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 635 p6 = (struct iface_info_ipv6 *)p->Buffer; 636 addr6->sin6_family = AF_INET6; 637 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 638 639 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 640 addr6->sin6_flowinfo = 0; 641 addr6->sin6_scope_id = 0; 642 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 643 644 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 645 &addr6->sin6_addr); 646 break; 647 default: 648 cifs_dbg(VFS, 649 "%s: skipping unsupported socket family\n", 650 __func__); 651 goto next_iface; 652 } 653 654 /* 655 * The iface_list is assumed to be sorted by speed. 656 * Check if the new interface exists in that list. 657 * NEVER change iface. it could be in use. 658 * Add a new one instead 659 */ 660 spin_lock(&ses->iface_lock); 661 list_for_each_entry_safe(iface, niface, &ses->iface_list, 662 iface_head) { 663 ret = iface_cmp(iface, &tmp_iface); 664 if (!ret) { 665 /* just get a ref so that it doesn't get picked/freed */ 666 iface->is_active = 1; 667 kref_get(&iface->refcount); 668 ses->iface_count++; 669 spin_unlock(&ses->iface_lock); 670 goto next_iface; 671 } else if (ret < 0) { 672 /* all remaining ifaces are slower */ 673 kref_get(&iface->refcount); 674 break; 675 } 676 } 677 spin_unlock(&ses->iface_lock); 678 679 /* no match. insert the entry in the list */ 680 info = kmalloc(sizeof(struct cifs_server_iface), 681 GFP_KERNEL); 682 if (!info) { 683 rc = -ENOMEM; 684 goto out; 685 } 686 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 687 688 /* add this new entry to the list */ 689 kref_init(&info->refcount); 690 info->is_active = 1; 691 692 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 693 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 694 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 695 le32_to_cpu(p->Capability)); 696 697 spin_lock(&ses->iface_lock); 698 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 699 list_add_tail(&info->iface_head, &iface->iface_head); 700 kref_put(&iface->refcount, release_iface); 701 } else 702 list_add_tail(&info->iface_head, &ses->iface_list); 703 704 ses->iface_count++; 705 spin_unlock(&ses->iface_lock); 706 ses->iface_last_update = jiffies; 707 next_iface: 708 nb_iface++; 709 next = le32_to_cpu(p->Next); 710 if (!next) { 711 bytes_left -= sizeof(*p); 712 break; 713 } 714 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 715 bytes_left -= next; 716 } 717 718 if (!nb_iface) { 719 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 720 rc = -EINVAL; 721 goto out; 722 } 723 724 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 725 if ((bytes_left > 8) || p->Next) 726 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 727 728 729 if (!ses->iface_count) { 730 rc = -EINVAL; 731 goto out; 732 } 733 734 out: 735 return rc; 736 } 737 738 int 739 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 740 { 741 int rc; 742 unsigned int ret_data_len = 0; 743 struct network_interface_info_ioctl_rsp *out_buf = NULL; 744 struct cifs_ses *ses = tcon->ses; 745 746 /* do not query too frequently */ 747 if (ses->iface_last_update && 748 time_before(jiffies, ses->iface_last_update + 749 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 750 return 0; 751 752 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 753 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 754 NULL /* no data input */, 0 /* no data input */, 755 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 756 if (rc == -EOPNOTSUPP) { 757 cifs_dbg(FYI, 758 "server does not support query network interfaces\n"); 759 ret_data_len = 0; 760 } else if (rc != 0) { 761 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 762 goto out; 763 } 764 765 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 766 if (rc) 767 goto out; 768 769 out: 770 kfree(out_buf); 771 return rc; 772 } 773 774 static void 775 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 776 struct cifs_sb_info *cifs_sb) 777 { 778 int rc; 779 __le16 srch_path = 0; /* Null - open root of share */ 780 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 781 struct cifs_open_parms oparms; 782 struct cifs_fid fid; 783 struct cached_fid *cfid = NULL; 784 785 oparms = (struct cifs_open_parms) { 786 .tcon = tcon, 787 .path = "", 788 .desired_access = FILE_READ_ATTRIBUTES, 789 .disposition = FILE_OPEN, 790 .create_options = cifs_create_options(cifs_sb, 0), 791 .fid = &fid, 792 }; 793 794 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 795 if (rc == 0) 796 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 797 else 798 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 799 NULL, NULL); 800 if (rc) 801 return; 802 803 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 804 805 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 806 FS_ATTRIBUTE_INFORMATION); 807 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 808 FS_DEVICE_INFORMATION); 809 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 810 FS_VOLUME_INFORMATION); 811 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 812 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 813 if (cfid == NULL) 814 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 815 else 816 close_cached_dir(cfid); 817 } 818 819 static void 820 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 821 struct cifs_sb_info *cifs_sb) 822 { 823 int rc; 824 __le16 srch_path = 0; /* Null - open root of share */ 825 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 826 struct cifs_open_parms oparms; 827 struct cifs_fid fid; 828 829 oparms = (struct cifs_open_parms) { 830 .tcon = tcon, 831 .path = "", 832 .desired_access = FILE_READ_ATTRIBUTES, 833 .disposition = FILE_OPEN, 834 .create_options = cifs_create_options(cifs_sb, 0), 835 .fid = &fid, 836 }; 837 838 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 839 NULL, NULL); 840 if (rc) 841 return; 842 843 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 844 FS_ATTRIBUTE_INFORMATION); 845 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 846 FS_DEVICE_INFORMATION); 847 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 848 } 849 850 static int 851 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 852 struct cifs_sb_info *cifs_sb, const char *full_path) 853 { 854 __le16 *utf16_path; 855 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 856 int err_buftype = CIFS_NO_BUFFER; 857 struct cifs_open_parms oparms; 858 struct kvec err_iov = {}; 859 struct cifs_fid fid; 860 struct cached_fid *cfid; 861 bool islink; 862 int rc, rc2; 863 864 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 865 if (!rc) { 866 if (cfid->has_lease) { 867 close_cached_dir(cfid); 868 return 0; 869 } 870 close_cached_dir(cfid); 871 } 872 873 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 874 if (!utf16_path) 875 return -ENOMEM; 876 877 oparms = (struct cifs_open_parms) { 878 .tcon = tcon, 879 .path = full_path, 880 .desired_access = FILE_READ_ATTRIBUTES, 881 .disposition = FILE_OPEN, 882 .create_options = cifs_create_options(cifs_sb, 0), 883 .fid = &fid, 884 }; 885 886 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 887 &err_iov, &err_buftype); 888 if (rc) { 889 struct smb2_hdr *hdr = err_iov.iov_base; 890 891 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 892 goto out; 893 894 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 895 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 896 full_path, &islink); 897 if (rc2) { 898 rc = rc2; 899 goto out; 900 } 901 if (islink) 902 rc = -EREMOTE; 903 } 904 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 905 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 906 rc = -EOPNOTSUPP; 907 goto out; 908 } 909 910 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 911 912 out: 913 free_rsp_buf(err_buftype, err_iov.iov_base); 914 kfree(utf16_path); 915 return rc; 916 } 917 918 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 919 struct cifs_sb_info *cifs_sb, const char *full_path, 920 u64 *uniqueid, struct cifs_open_info_data *data) 921 { 922 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 923 return 0; 924 } 925 926 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 927 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 928 { 929 struct cifs_fid *fid = &cfile->fid; 930 931 if (cfile->symlink_target) { 932 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 933 if (!data->symlink_target) 934 return -ENOMEM; 935 } 936 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 937 } 938 939 #ifdef CONFIG_CIFS_XATTR 940 static ssize_t 941 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 942 struct smb2_file_full_ea_info *src, size_t src_size, 943 const unsigned char *ea_name) 944 { 945 int rc = 0; 946 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 947 char *name, *value; 948 size_t buf_size = dst_size; 949 size_t name_len, value_len, user_name_len; 950 951 while (src_size > 0) { 952 name_len = (size_t)src->ea_name_length; 953 value_len = (size_t)le16_to_cpu(src->ea_value_length); 954 955 if (name_len == 0) 956 break; 957 958 if (src_size < 8 + name_len + 1 + value_len) { 959 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 960 rc = -EIO; 961 goto out; 962 } 963 964 name = &src->ea_data[0]; 965 value = &src->ea_data[src->ea_name_length + 1]; 966 967 if (ea_name) { 968 if (ea_name_len == name_len && 969 memcmp(ea_name, name, name_len) == 0) { 970 rc = value_len; 971 if (dst_size == 0) 972 goto out; 973 if (dst_size < value_len) { 974 rc = -ERANGE; 975 goto out; 976 } 977 memcpy(dst, value, value_len); 978 goto out; 979 } 980 } else { 981 /* 'user.' plus a terminating null */ 982 user_name_len = 5 + 1 + name_len; 983 984 if (buf_size == 0) { 985 /* skip copy - calc size only */ 986 rc += user_name_len; 987 } else if (dst_size >= user_name_len) { 988 dst_size -= user_name_len; 989 memcpy(dst, "user.", 5); 990 dst += 5; 991 memcpy(dst, src->ea_data, name_len); 992 dst += name_len; 993 *dst = 0; 994 ++dst; 995 rc += user_name_len; 996 } else { 997 /* stop before overrun buffer */ 998 rc = -ERANGE; 999 break; 1000 } 1001 } 1002 1003 if (!src->next_entry_offset) 1004 break; 1005 1006 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1007 /* stop before overrun buffer */ 1008 rc = -ERANGE; 1009 break; 1010 } 1011 src_size -= le32_to_cpu(src->next_entry_offset); 1012 src = (void *)((char *)src + 1013 le32_to_cpu(src->next_entry_offset)); 1014 } 1015 1016 /* didn't find the named attribute */ 1017 if (ea_name) 1018 rc = -ENODATA; 1019 1020 out: 1021 return (ssize_t)rc; 1022 } 1023 1024 static ssize_t 1025 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1026 const unsigned char *path, const unsigned char *ea_name, 1027 char *ea_data, size_t buf_size, 1028 struct cifs_sb_info *cifs_sb) 1029 { 1030 int rc; 1031 struct kvec rsp_iov = {NULL, 0}; 1032 int buftype = CIFS_NO_BUFFER; 1033 struct smb2_query_info_rsp *rsp; 1034 struct smb2_file_full_ea_info *info = NULL; 1035 1036 rc = smb2_query_info_compound(xid, tcon, path, 1037 FILE_READ_EA, 1038 FILE_FULL_EA_INFORMATION, 1039 SMB2_O_INFO_FILE, 1040 CIFSMaxBufSize - 1041 MAX_SMB2_CREATE_RESPONSE_SIZE - 1042 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1043 &rsp_iov, &buftype, cifs_sb); 1044 if (rc) { 1045 /* 1046 * If ea_name is NULL (listxattr) and there are no EAs, 1047 * return 0 as it's not an error. Otherwise, the specified 1048 * ea_name was not found. 1049 */ 1050 if (!ea_name && rc == -ENODATA) 1051 rc = 0; 1052 goto qeas_exit; 1053 } 1054 1055 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1056 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1057 le32_to_cpu(rsp->OutputBufferLength), 1058 &rsp_iov, 1059 sizeof(struct smb2_file_full_ea_info)); 1060 if (rc) 1061 goto qeas_exit; 1062 1063 info = (struct smb2_file_full_ea_info *)( 1064 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1065 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1066 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1067 1068 qeas_exit: 1069 free_rsp_buf(buftype, rsp_iov.iov_base); 1070 return rc; 1071 } 1072 1073 1074 static int 1075 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1076 const char *path, const char *ea_name, const void *ea_value, 1077 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1078 struct cifs_sb_info *cifs_sb) 1079 { 1080 struct cifs_ses *ses = tcon->ses; 1081 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1082 __le16 *utf16_path = NULL; 1083 int ea_name_len = strlen(ea_name); 1084 int flags = CIFS_CP_CREATE_CLOSE_OP; 1085 int len; 1086 struct smb_rqst rqst[3]; 1087 int resp_buftype[3]; 1088 struct kvec rsp_iov[3]; 1089 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 1090 struct cifs_open_parms oparms; 1091 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1092 struct cifs_fid fid; 1093 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 1094 unsigned int size[1]; 1095 void *data[1]; 1096 struct smb2_file_full_ea_info *ea = NULL; 1097 struct kvec close_iov[1]; 1098 struct smb2_query_info_rsp *rsp; 1099 int rc, used_len = 0; 1100 1101 if (smb3_encryption_required(tcon)) 1102 flags |= CIFS_TRANSFORM_REQ; 1103 1104 if (ea_name_len > 255) 1105 return -EINVAL; 1106 1107 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1108 if (!utf16_path) 1109 return -ENOMEM; 1110 1111 memset(rqst, 0, sizeof(rqst)); 1112 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1113 memset(rsp_iov, 0, sizeof(rsp_iov)); 1114 1115 if (ses->server->ops->query_all_EAs) { 1116 if (!ea_value) { 1117 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1118 ea_name, NULL, 0, 1119 cifs_sb); 1120 if (rc == -ENODATA) 1121 goto sea_exit; 1122 } else { 1123 /* If we are adding a attribute we should first check 1124 * if there will be enough space available to store 1125 * the new EA. If not we should not add it since we 1126 * would not be able to even read the EAs back. 1127 */ 1128 rc = smb2_query_info_compound(xid, tcon, path, 1129 FILE_READ_EA, 1130 FILE_FULL_EA_INFORMATION, 1131 SMB2_O_INFO_FILE, 1132 CIFSMaxBufSize - 1133 MAX_SMB2_CREATE_RESPONSE_SIZE - 1134 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1135 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1136 if (rc == 0) { 1137 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1138 used_len = le32_to_cpu(rsp->OutputBufferLength); 1139 } 1140 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1141 resp_buftype[1] = CIFS_NO_BUFFER; 1142 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1143 rc = 0; 1144 1145 /* Use a fudge factor of 256 bytes in case we collide 1146 * with a different set_EAs command. 1147 */ 1148 if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1149 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1150 used_len + ea_name_len + ea_value_len + 1) { 1151 rc = -ENOSPC; 1152 goto sea_exit; 1153 } 1154 } 1155 } 1156 1157 /* Open */ 1158 memset(&open_iov, 0, sizeof(open_iov)); 1159 rqst[0].rq_iov = open_iov; 1160 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1161 1162 oparms = (struct cifs_open_parms) { 1163 .tcon = tcon, 1164 .path = path, 1165 .desired_access = FILE_WRITE_EA, 1166 .disposition = FILE_OPEN, 1167 .create_options = cifs_create_options(cifs_sb, 0), 1168 .fid = &fid, 1169 }; 1170 1171 rc = SMB2_open_init(tcon, server, 1172 &rqst[0], &oplock, &oparms, utf16_path); 1173 if (rc) 1174 goto sea_exit; 1175 smb2_set_next_command(tcon, &rqst[0]); 1176 1177 1178 /* Set Info */ 1179 memset(&si_iov, 0, sizeof(si_iov)); 1180 rqst[1].rq_iov = si_iov; 1181 rqst[1].rq_nvec = 1; 1182 1183 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1184 ea = kzalloc(len, GFP_KERNEL); 1185 if (ea == NULL) { 1186 rc = -ENOMEM; 1187 goto sea_exit; 1188 } 1189 1190 ea->ea_name_length = ea_name_len; 1191 ea->ea_value_length = cpu_to_le16(ea_value_len); 1192 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1193 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1194 1195 size[0] = len; 1196 data[0] = ea; 1197 1198 rc = SMB2_set_info_init(tcon, server, 1199 &rqst[1], COMPOUND_FID, 1200 COMPOUND_FID, current->tgid, 1201 FILE_FULL_EA_INFORMATION, 1202 SMB2_O_INFO_FILE, 0, data, size); 1203 if (rc) 1204 goto sea_exit; 1205 smb2_set_next_command(tcon, &rqst[1]); 1206 smb2_set_related(&rqst[1]); 1207 1208 1209 /* Close */ 1210 memset(&close_iov, 0, sizeof(close_iov)); 1211 rqst[2].rq_iov = close_iov; 1212 rqst[2].rq_nvec = 1; 1213 rc = SMB2_close_init(tcon, server, 1214 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1215 if (rc) 1216 goto sea_exit; 1217 smb2_set_related(&rqst[2]); 1218 1219 rc = compound_send_recv(xid, ses, server, 1220 flags, 3, rqst, 1221 resp_buftype, rsp_iov); 1222 /* no need to bump num_remote_opens because handle immediately closed */ 1223 1224 sea_exit: 1225 kfree(ea); 1226 kfree(utf16_path); 1227 SMB2_open_free(&rqst[0]); 1228 SMB2_set_info_free(&rqst[1]); 1229 SMB2_close_free(&rqst[2]); 1230 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1231 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1232 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1233 return rc; 1234 } 1235 #endif 1236 1237 static bool 1238 smb2_can_echo(struct TCP_Server_Info *server) 1239 { 1240 return server->echoes; 1241 } 1242 1243 static void 1244 smb2_clear_stats(struct cifs_tcon *tcon) 1245 { 1246 int i; 1247 1248 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1249 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1250 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1251 } 1252 } 1253 1254 static void 1255 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1256 { 1257 seq_puts(m, "\n\tShare Capabilities:"); 1258 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1259 seq_puts(m, " DFS,"); 1260 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1261 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1262 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1263 seq_puts(m, " SCALEOUT,"); 1264 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1265 seq_puts(m, " CLUSTER,"); 1266 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1267 seq_puts(m, " ASYMMETRIC,"); 1268 if (tcon->capabilities == 0) 1269 seq_puts(m, " None"); 1270 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1271 seq_puts(m, " Aligned,"); 1272 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1273 seq_puts(m, " Partition Aligned,"); 1274 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1275 seq_puts(m, " SSD,"); 1276 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1277 seq_puts(m, " TRIM-support,"); 1278 1279 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1280 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1281 if (tcon->perf_sector_size) 1282 seq_printf(m, "\tOptimal sector size: 0x%x", 1283 tcon->perf_sector_size); 1284 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1285 } 1286 1287 static void 1288 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1289 { 1290 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1291 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1292 1293 /* 1294 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1295 * totals (requests sent) since those SMBs are per-session not per tcon 1296 */ 1297 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1298 (long long)(tcon->bytes_read), 1299 (long long)(tcon->bytes_written)); 1300 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1301 atomic_read(&tcon->num_local_opens), 1302 atomic_read(&tcon->num_remote_opens)); 1303 seq_printf(m, "\nTreeConnects: %d total %d failed", 1304 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1305 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1306 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1307 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1308 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1309 seq_printf(m, "\nCreates: %d total %d failed", 1310 atomic_read(&sent[SMB2_CREATE_HE]), 1311 atomic_read(&failed[SMB2_CREATE_HE])); 1312 seq_printf(m, "\nCloses: %d total %d failed", 1313 atomic_read(&sent[SMB2_CLOSE_HE]), 1314 atomic_read(&failed[SMB2_CLOSE_HE])); 1315 seq_printf(m, "\nFlushes: %d total %d failed", 1316 atomic_read(&sent[SMB2_FLUSH_HE]), 1317 atomic_read(&failed[SMB2_FLUSH_HE])); 1318 seq_printf(m, "\nReads: %d total %d failed", 1319 atomic_read(&sent[SMB2_READ_HE]), 1320 atomic_read(&failed[SMB2_READ_HE])); 1321 seq_printf(m, "\nWrites: %d total %d failed", 1322 atomic_read(&sent[SMB2_WRITE_HE]), 1323 atomic_read(&failed[SMB2_WRITE_HE])); 1324 seq_printf(m, "\nLocks: %d total %d failed", 1325 atomic_read(&sent[SMB2_LOCK_HE]), 1326 atomic_read(&failed[SMB2_LOCK_HE])); 1327 seq_printf(m, "\nIOCTLs: %d total %d failed", 1328 atomic_read(&sent[SMB2_IOCTL_HE]), 1329 atomic_read(&failed[SMB2_IOCTL_HE])); 1330 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1331 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1332 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1333 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1334 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1335 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1336 seq_printf(m, "\nQueryInfos: %d total %d failed", 1337 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1338 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1339 seq_printf(m, "\nSetInfos: %d total %d failed", 1340 atomic_read(&sent[SMB2_SET_INFO_HE]), 1341 atomic_read(&failed[SMB2_SET_INFO_HE])); 1342 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1343 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1344 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1345 } 1346 1347 static void 1348 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1349 { 1350 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1351 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1352 1353 cfile->fid.persistent_fid = fid->persistent_fid; 1354 cfile->fid.volatile_fid = fid->volatile_fid; 1355 cfile->fid.access = fid->access; 1356 #ifdef CONFIG_CIFS_DEBUG2 1357 cfile->fid.mid = fid->mid; 1358 #endif /* CIFS_DEBUG2 */ 1359 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1360 &fid->purge_cache); 1361 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1362 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1363 } 1364 1365 static void 1366 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1367 struct cifs_fid *fid) 1368 { 1369 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1370 } 1371 1372 static void 1373 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1374 struct cifsFileInfo *cfile) 1375 { 1376 struct smb2_file_network_open_info file_inf; 1377 struct inode *inode; 1378 int rc; 1379 1380 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1381 cfile->fid.volatile_fid, &file_inf); 1382 if (rc) 1383 return; 1384 1385 inode = d_inode(cfile->dentry); 1386 1387 spin_lock(&inode->i_lock); 1388 CIFS_I(inode)->time = jiffies; 1389 1390 /* Creation time should not need to be updated on close */ 1391 if (file_inf.LastWriteTime) 1392 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime); 1393 if (file_inf.ChangeTime) 1394 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime); 1395 if (file_inf.LastAccessTime) 1396 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime); 1397 1398 /* 1399 * i_blocks is not related to (i_size / i_blksize), 1400 * but instead 512 byte (2**9) size is required for 1401 * calculating num blocks. 1402 */ 1403 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1404 inode->i_blocks = 1405 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1406 1407 /* End of file and Attributes should not have to be updated on close */ 1408 spin_unlock(&inode->i_lock); 1409 } 1410 1411 static int 1412 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1413 u64 persistent_fid, u64 volatile_fid, 1414 struct copychunk_ioctl *pcchunk) 1415 { 1416 int rc; 1417 unsigned int ret_data_len; 1418 struct resume_key_req *res_key; 1419 1420 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1421 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1422 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1423 1424 if (rc == -EOPNOTSUPP) { 1425 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1426 goto req_res_key_exit; 1427 } else if (rc) { 1428 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1429 goto req_res_key_exit; 1430 } 1431 if (ret_data_len < sizeof(struct resume_key_req)) { 1432 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1433 rc = -EINVAL; 1434 goto req_res_key_exit; 1435 } 1436 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1437 1438 req_res_key_exit: 1439 kfree(res_key); 1440 return rc; 1441 } 1442 1443 struct iqi_vars { 1444 struct smb_rqst rqst[3]; 1445 struct kvec rsp_iov[3]; 1446 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 1447 struct kvec qi_iov[1]; 1448 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 1449 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 1450 struct kvec close_iov[1]; 1451 }; 1452 1453 static int 1454 smb2_ioctl_query_info(const unsigned int xid, 1455 struct cifs_tcon *tcon, 1456 struct cifs_sb_info *cifs_sb, 1457 __le16 *path, int is_dir, 1458 unsigned long p) 1459 { 1460 struct iqi_vars *vars; 1461 struct smb_rqst *rqst; 1462 struct kvec *rsp_iov; 1463 struct cifs_ses *ses = tcon->ses; 1464 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1465 char __user *arg = (char __user *)p; 1466 struct smb_query_info qi; 1467 struct smb_query_info __user *pqi; 1468 int rc = 0; 1469 int flags = CIFS_CP_CREATE_CLOSE_OP; 1470 struct smb2_query_info_rsp *qi_rsp = NULL; 1471 struct smb2_ioctl_rsp *io_rsp = NULL; 1472 void *buffer = NULL; 1473 int resp_buftype[3]; 1474 struct cifs_open_parms oparms; 1475 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1476 struct cifs_fid fid; 1477 unsigned int size[2]; 1478 void *data[2]; 1479 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1480 void (*free_req1_func)(struct smb_rqst *r); 1481 1482 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1483 if (vars == NULL) 1484 return -ENOMEM; 1485 rqst = &vars->rqst[0]; 1486 rsp_iov = &vars->rsp_iov[0]; 1487 1488 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1489 1490 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1491 rc = -EFAULT; 1492 goto free_vars; 1493 } 1494 if (qi.output_buffer_length > 1024) { 1495 rc = -EINVAL; 1496 goto free_vars; 1497 } 1498 1499 if (!ses || !server) { 1500 rc = -EIO; 1501 goto free_vars; 1502 } 1503 1504 if (smb3_encryption_required(tcon)) 1505 flags |= CIFS_TRANSFORM_REQ; 1506 1507 if (qi.output_buffer_length) { 1508 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1509 if (IS_ERR(buffer)) { 1510 rc = PTR_ERR(buffer); 1511 goto free_vars; 1512 } 1513 } 1514 1515 /* Open */ 1516 rqst[0].rq_iov = &vars->open_iov[0]; 1517 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1518 1519 oparms = (struct cifs_open_parms) { 1520 .tcon = tcon, 1521 .disposition = FILE_OPEN, 1522 .create_options = cifs_create_options(cifs_sb, create_options), 1523 .fid = &fid, 1524 }; 1525 1526 if (qi.flags & PASSTHRU_FSCTL) { 1527 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1528 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1529 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1530 break; 1531 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1532 oparms.desired_access = GENERIC_ALL; 1533 break; 1534 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1535 oparms.desired_access = GENERIC_READ; 1536 break; 1537 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1538 oparms.desired_access = GENERIC_WRITE; 1539 break; 1540 } 1541 } else if (qi.flags & PASSTHRU_SET_INFO) { 1542 oparms.desired_access = GENERIC_WRITE; 1543 } else { 1544 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1545 } 1546 1547 rc = SMB2_open_init(tcon, server, 1548 &rqst[0], &oplock, &oparms, path); 1549 if (rc) 1550 goto free_output_buffer; 1551 smb2_set_next_command(tcon, &rqst[0]); 1552 1553 /* Query */ 1554 if (qi.flags & PASSTHRU_FSCTL) { 1555 /* Can eventually relax perm check since server enforces too */ 1556 if (!capable(CAP_SYS_ADMIN)) { 1557 rc = -EPERM; 1558 goto free_open_req; 1559 } 1560 rqst[1].rq_iov = &vars->io_iov[0]; 1561 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1562 1563 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1564 qi.info_type, buffer, qi.output_buffer_length, 1565 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1566 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1567 free_req1_func = SMB2_ioctl_free; 1568 } else if (qi.flags == PASSTHRU_SET_INFO) { 1569 /* Can eventually relax perm check since server enforces too */ 1570 if (!capable(CAP_SYS_ADMIN)) { 1571 rc = -EPERM; 1572 goto free_open_req; 1573 } 1574 if (qi.output_buffer_length < 8) { 1575 rc = -EINVAL; 1576 goto free_open_req; 1577 } 1578 rqst[1].rq_iov = &vars->si_iov[0]; 1579 rqst[1].rq_nvec = 1; 1580 1581 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1582 size[0] = 8; 1583 data[0] = buffer; 1584 1585 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1586 current->tgid, FILE_END_OF_FILE_INFORMATION, 1587 SMB2_O_INFO_FILE, 0, data, size); 1588 free_req1_func = SMB2_set_info_free; 1589 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1590 rqst[1].rq_iov = &vars->qi_iov[0]; 1591 rqst[1].rq_nvec = 1; 1592 1593 rc = SMB2_query_info_init(tcon, server, 1594 &rqst[1], COMPOUND_FID, 1595 COMPOUND_FID, qi.file_info_class, 1596 qi.info_type, qi.additional_information, 1597 qi.input_buffer_length, 1598 qi.output_buffer_length, buffer); 1599 free_req1_func = SMB2_query_info_free; 1600 } else { /* unknown flags */ 1601 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1602 qi.flags); 1603 rc = -EINVAL; 1604 } 1605 1606 if (rc) 1607 goto free_open_req; 1608 smb2_set_next_command(tcon, &rqst[1]); 1609 smb2_set_related(&rqst[1]); 1610 1611 /* Close */ 1612 rqst[2].rq_iov = &vars->close_iov[0]; 1613 rqst[2].rq_nvec = 1; 1614 1615 rc = SMB2_close_init(tcon, server, 1616 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1617 if (rc) 1618 goto free_req_1; 1619 smb2_set_related(&rqst[2]); 1620 1621 rc = compound_send_recv(xid, ses, server, 1622 flags, 3, rqst, 1623 resp_buftype, rsp_iov); 1624 if (rc) 1625 goto out; 1626 1627 /* No need to bump num_remote_opens since handle immediately closed */ 1628 if (qi.flags & PASSTHRU_FSCTL) { 1629 pqi = (struct smb_query_info __user *)arg; 1630 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1631 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1632 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1633 if (qi.input_buffer_length > 0 && 1634 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1635 > rsp_iov[1].iov_len) { 1636 rc = -EFAULT; 1637 goto out; 1638 } 1639 1640 if (copy_to_user(&pqi->input_buffer_length, 1641 &qi.input_buffer_length, 1642 sizeof(qi.input_buffer_length))) { 1643 rc = -EFAULT; 1644 goto out; 1645 } 1646 1647 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1648 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1649 qi.input_buffer_length)) 1650 rc = -EFAULT; 1651 } else { 1652 pqi = (struct smb_query_info __user *)arg; 1653 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1654 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1655 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1656 if (copy_to_user(&pqi->input_buffer_length, 1657 &qi.input_buffer_length, 1658 sizeof(qi.input_buffer_length))) { 1659 rc = -EFAULT; 1660 goto out; 1661 } 1662 1663 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1664 qi.input_buffer_length)) 1665 rc = -EFAULT; 1666 } 1667 1668 out: 1669 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1670 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1671 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1672 SMB2_close_free(&rqst[2]); 1673 free_req_1: 1674 free_req1_func(&rqst[1]); 1675 free_open_req: 1676 SMB2_open_free(&rqst[0]); 1677 free_output_buffer: 1678 kfree(buffer); 1679 free_vars: 1680 kfree(vars); 1681 return rc; 1682 } 1683 1684 static ssize_t 1685 smb2_copychunk_range(const unsigned int xid, 1686 struct cifsFileInfo *srcfile, 1687 struct cifsFileInfo *trgtfile, u64 src_off, 1688 u64 len, u64 dest_off) 1689 { 1690 int rc; 1691 unsigned int ret_data_len; 1692 struct copychunk_ioctl *pcchunk; 1693 struct copychunk_ioctl_rsp *retbuf = NULL; 1694 struct cifs_tcon *tcon; 1695 int chunks_copied = 0; 1696 bool chunk_sizes_updated = false; 1697 ssize_t bytes_written, total_bytes_written = 0; 1698 1699 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1700 if (pcchunk == NULL) 1701 return -ENOMEM; 1702 1703 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1704 /* Request a key from the server to identify the source of the copy */ 1705 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1706 srcfile->fid.persistent_fid, 1707 srcfile->fid.volatile_fid, pcchunk); 1708 1709 /* Note: request_res_key sets res_key null only if rc !=0 */ 1710 if (rc) 1711 goto cchunk_out; 1712 1713 /* For now array only one chunk long, will make more flexible later */ 1714 pcchunk->ChunkCount = cpu_to_le32(1); 1715 pcchunk->Reserved = 0; 1716 pcchunk->Reserved2 = 0; 1717 1718 tcon = tlink_tcon(trgtfile->tlink); 1719 1720 while (len > 0) { 1721 pcchunk->SourceOffset = cpu_to_le64(src_off); 1722 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1723 pcchunk->Length = 1724 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1725 1726 /* Request server copy to target from src identified by key */ 1727 kfree(retbuf); 1728 retbuf = NULL; 1729 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1730 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1731 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1732 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1733 if (rc == 0) { 1734 if (ret_data_len != 1735 sizeof(struct copychunk_ioctl_rsp)) { 1736 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1737 rc = -EIO; 1738 goto cchunk_out; 1739 } 1740 if (retbuf->TotalBytesWritten == 0) { 1741 cifs_dbg(FYI, "no bytes copied\n"); 1742 rc = -EIO; 1743 goto cchunk_out; 1744 } 1745 /* 1746 * Check if server claimed to write more than we asked 1747 */ 1748 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1749 le32_to_cpu(pcchunk->Length)) { 1750 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1751 rc = -EIO; 1752 goto cchunk_out; 1753 } 1754 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1755 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1756 rc = -EIO; 1757 goto cchunk_out; 1758 } 1759 chunks_copied++; 1760 1761 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1762 src_off += bytes_written; 1763 dest_off += bytes_written; 1764 len -= bytes_written; 1765 total_bytes_written += bytes_written; 1766 1767 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1768 le32_to_cpu(retbuf->ChunksWritten), 1769 le32_to_cpu(retbuf->ChunkBytesWritten), 1770 bytes_written); 1771 } else if (rc == -EINVAL) { 1772 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1773 goto cchunk_out; 1774 1775 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1776 le32_to_cpu(retbuf->ChunksWritten), 1777 le32_to_cpu(retbuf->ChunkBytesWritten), 1778 le32_to_cpu(retbuf->TotalBytesWritten)); 1779 1780 /* 1781 * Check if this is the first request using these sizes, 1782 * (ie check if copy succeed once with original sizes 1783 * and check if the server gave us different sizes after 1784 * we already updated max sizes on previous request). 1785 * if not then why is the server returning an error now 1786 */ 1787 if ((chunks_copied != 0) || chunk_sizes_updated) 1788 goto cchunk_out; 1789 1790 /* Check that server is not asking us to grow size */ 1791 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1792 tcon->max_bytes_chunk) 1793 tcon->max_bytes_chunk = 1794 le32_to_cpu(retbuf->ChunkBytesWritten); 1795 else 1796 goto cchunk_out; /* server gave us bogus size */ 1797 1798 /* No need to change MaxChunks since already set to 1 */ 1799 chunk_sizes_updated = true; 1800 } else 1801 goto cchunk_out; 1802 } 1803 1804 cchunk_out: 1805 kfree(pcchunk); 1806 kfree(retbuf); 1807 if (rc) 1808 return rc; 1809 else 1810 return total_bytes_written; 1811 } 1812 1813 static int 1814 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1815 struct cifs_fid *fid) 1816 { 1817 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1818 } 1819 1820 static unsigned int 1821 smb2_read_data_offset(char *buf) 1822 { 1823 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1824 1825 return rsp->DataOffset; 1826 } 1827 1828 static unsigned int 1829 smb2_read_data_length(char *buf, bool in_remaining) 1830 { 1831 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1832 1833 if (in_remaining) 1834 return le32_to_cpu(rsp->DataRemaining); 1835 1836 return le32_to_cpu(rsp->DataLength); 1837 } 1838 1839 1840 static int 1841 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1842 struct cifs_io_parms *parms, unsigned int *bytes_read, 1843 char **buf, int *buf_type) 1844 { 1845 parms->persistent_fid = pfid->persistent_fid; 1846 parms->volatile_fid = pfid->volatile_fid; 1847 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1848 } 1849 1850 static int 1851 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1852 struct cifs_io_parms *parms, unsigned int *written, 1853 struct kvec *iov, unsigned long nr_segs) 1854 { 1855 1856 parms->persistent_fid = pfid->persistent_fid; 1857 parms->volatile_fid = pfid->volatile_fid; 1858 return SMB2_write(xid, parms, written, iov, nr_segs); 1859 } 1860 1861 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1862 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1863 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1864 { 1865 struct cifsInodeInfo *cifsi; 1866 int rc; 1867 1868 cifsi = CIFS_I(inode); 1869 1870 /* if file already sparse don't bother setting sparse again */ 1871 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1872 return true; /* already sparse */ 1873 1874 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1875 return true; /* already not sparse */ 1876 1877 /* 1878 * Can't check for sparse support on share the usual way via the 1879 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1880 * since Samba server doesn't set the flag on the share, yet 1881 * supports the set sparse FSCTL and returns sparse correctly 1882 * in the file attributes. If we fail setting sparse though we 1883 * mark that server does not support sparse files for this share 1884 * to avoid repeatedly sending the unsupported fsctl to server 1885 * if the file is repeatedly extended. 1886 */ 1887 if (tcon->broken_sparse_sup) 1888 return false; 1889 1890 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1891 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1892 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1893 if (rc) { 1894 tcon->broken_sparse_sup = true; 1895 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1896 return false; 1897 } 1898 1899 if (setsparse) 1900 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1901 else 1902 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1903 1904 return true; 1905 } 1906 1907 static int 1908 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1909 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1910 { 1911 __le64 eof = cpu_to_le64(size); 1912 struct inode *inode; 1913 1914 /* 1915 * If extending file more than one page make sparse. Many Linux fs 1916 * make files sparse by default when extending via ftruncate 1917 */ 1918 inode = d_inode(cfile->dentry); 1919 1920 if (!set_alloc && (size > inode->i_size + 8192)) { 1921 __u8 set_sparse = 1; 1922 1923 /* whether set sparse succeeds or not, extend the file */ 1924 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1925 } 1926 1927 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1928 cfile->fid.volatile_fid, cfile->pid, &eof); 1929 } 1930 1931 static int 1932 smb2_duplicate_extents(const unsigned int xid, 1933 struct cifsFileInfo *srcfile, 1934 struct cifsFileInfo *trgtfile, u64 src_off, 1935 u64 len, u64 dest_off) 1936 { 1937 int rc; 1938 unsigned int ret_data_len; 1939 struct inode *inode; 1940 struct duplicate_extents_to_file dup_ext_buf; 1941 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 1942 1943 /* server fileays advertise duplicate extent support with this flag */ 1944 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 1945 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 1946 return -EOPNOTSUPP; 1947 1948 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 1949 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 1950 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 1951 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 1952 dup_ext_buf.ByteCount = cpu_to_le64(len); 1953 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 1954 src_off, dest_off, len); 1955 1956 inode = d_inode(trgtfile->dentry); 1957 if (inode->i_size < dest_off + len) { 1958 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 1959 if (rc) 1960 goto duplicate_extents_out; 1961 1962 /* 1963 * Although also could set plausible allocation size (i_blocks) 1964 * here in addition to setting the file size, in reflink 1965 * it is likely that the target file is sparse. Its allocation 1966 * size will be queried on next revalidate, but it is important 1967 * to make sure that file's cached size is updated immediately 1968 */ 1969 cifs_setsize(inode, dest_off + len); 1970 } 1971 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1972 trgtfile->fid.volatile_fid, 1973 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 1974 (char *)&dup_ext_buf, 1975 sizeof(struct duplicate_extents_to_file), 1976 CIFSMaxBufSize, NULL, 1977 &ret_data_len); 1978 1979 if (ret_data_len > 0) 1980 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 1981 1982 duplicate_extents_out: 1983 return rc; 1984 } 1985 1986 static int 1987 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 1988 struct cifsFileInfo *cfile) 1989 { 1990 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 1991 cfile->fid.volatile_fid); 1992 } 1993 1994 static int 1995 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 1996 struct cifsFileInfo *cfile) 1997 { 1998 struct fsctl_set_integrity_information_req integr_info; 1999 unsigned int ret_data_len; 2000 2001 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2002 integr_info.Flags = 0; 2003 integr_info.Reserved = 0; 2004 2005 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2006 cfile->fid.volatile_fid, 2007 FSCTL_SET_INTEGRITY_INFORMATION, 2008 (char *)&integr_info, 2009 sizeof(struct fsctl_set_integrity_information_req), 2010 CIFSMaxBufSize, NULL, 2011 &ret_data_len); 2012 2013 } 2014 2015 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2016 #define GMT_TOKEN_SIZE 50 2017 2018 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2019 2020 /* 2021 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2022 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2023 */ 2024 static int 2025 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2026 struct cifsFileInfo *cfile, void __user *ioc_buf) 2027 { 2028 char *retbuf = NULL; 2029 unsigned int ret_data_len = 0; 2030 int rc; 2031 u32 max_response_size; 2032 struct smb_snapshot_array snapshot_in; 2033 2034 /* 2035 * On the first query to enumerate the list of snapshots available 2036 * for this volume the buffer begins with 0 (number of snapshots 2037 * which can be returned is zero since at that point we do not know 2038 * how big the buffer needs to be). On the second query, 2039 * it (ret_data_len) is set to number of snapshots so we can 2040 * know to set the maximum response size larger (see below). 2041 */ 2042 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2043 return -EFAULT; 2044 2045 /* 2046 * Note that for snapshot queries that servers like Azure expect that 2047 * the first query be minimal size (and just used to get the number/size 2048 * of previous versions) so response size must be specified as EXACTLY 2049 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2050 * of eight bytes. 2051 */ 2052 if (ret_data_len == 0) 2053 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2054 else 2055 max_response_size = CIFSMaxBufSize; 2056 2057 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2058 cfile->fid.volatile_fid, 2059 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2060 NULL, 0 /* no input data */, max_response_size, 2061 (char **)&retbuf, 2062 &ret_data_len); 2063 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2064 rc, ret_data_len); 2065 if (rc) 2066 return rc; 2067 2068 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2069 /* Fixup buffer */ 2070 if (copy_from_user(&snapshot_in, ioc_buf, 2071 sizeof(struct smb_snapshot_array))) { 2072 rc = -EFAULT; 2073 kfree(retbuf); 2074 return rc; 2075 } 2076 2077 /* 2078 * Check for min size, ie not large enough to fit even one GMT 2079 * token (snapshot). On the first ioctl some users may pass in 2080 * smaller size (or zero) to simply get the size of the array 2081 * so the user space caller can allocate sufficient memory 2082 * and retry the ioctl again with larger array size sufficient 2083 * to hold all of the snapshot GMT tokens on the second try. 2084 */ 2085 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2086 ret_data_len = sizeof(struct smb_snapshot_array); 2087 2088 /* 2089 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2090 * the snapshot array (of 50 byte GMT tokens) each 2091 * representing an available previous version of the data 2092 */ 2093 if (ret_data_len > (snapshot_in.snapshot_array_size + 2094 sizeof(struct smb_snapshot_array))) 2095 ret_data_len = snapshot_in.snapshot_array_size + 2096 sizeof(struct smb_snapshot_array); 2097 2098 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2099 rc = -EFAULT; 2100 } 2101 2102 kfree(retbuf); 2103 return rc; 2104 } 2105 2106 2107 2108 static int 2109 smb3_notify(const unsigned int xid, struct file *pfile, 2110 void __user *ioc_buf, bool return_changes) 2111 { 2112 struct smb3_notify_info notify; 2113 struct smb3_notify_info __user *pnotify_buf; 2114 struct dentry *dentry = pfile->f_path.dentry; 2115 struct inode *inode = file_inode(pfile); 2116 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2117 struct cifs_open_parms oparms; 2118 struct cifs_fid fid; 2119 struct cifs_tcon *tcon; 2120 const unsigned char *path; 2121 char *returned_ioctl_info = NULL; 2122 void *page = alloc_dentry_path(); 2123 __le16 *utf16_path = NULL; 2124 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2125 int rc = 0; 2126 __u32 ret_len = 0; 2127 2128 path = build_path_from_dentry(dentry, page); 2129 if (IS_ERR(path)) { 2130 rc = PTR_ERR(path); 2131 goto notify_exit; 2132 } 2133 2134 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2135 if (utf16_path == NULL) { 2136 rc = -ENOMEM; 2137 goto notify_exit; 2138 } 2139 2140 if (return_changes) { 2141 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2142 rc = -EFAULT; 2143 goto notify_exit; 2144 } 2145 } else { 2146 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2147 rc = -EFAULT; 2148 goto notify_exit; 2149 } 2150 notify.data_len = 0; 2151 } 2152 2153 tcon = cifs_sb_master_tcon(cifs_sb); 2154 oparms = (struct cifs_open_parms) { 2155 .tcon = tcon, 2156 .path = path, 2157 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2158 .disposition = FILE_OPEN, 2159 .create_options = cifs_create_options(cifs_sb, 0), 2160 .fid = &fid, 2161 }; 2162 2163 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2164 NULL); 2165 if (rc) 2166 goto notify_exit; 2167 2168 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2169 notify.watch_tree, notify.completion_filter, 2170 notify.data_len, &returned_ioctl_info, &ret_len); 2171 2172 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2173 2174 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2175 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2176 if (ret_len > notify.data_len) 2177 ret_len = notify.data_len; 2178 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2179 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2180 rc = -EFAULT; 2181 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2182 rc = -EFAULT; 2183 } 2184 kfree(returned_ioctl_info); 2185 notify_exit: 2186 free_dentry_path(page); 2187 kfree(utf16_path); 2188 return rc; 2189 } 2190 2191 static int 2192 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2193 const char *path, struct cifs_sb_info *cifs_sb, 2194 struct cifs_fid *fid, __u16 search_flags, 2195 struct cifs_search_info *srch_inf) 2196 { 2197 __le16 *utf16_path; 2198 struct smb_rqst rqst[2]; 2199 struct kvec rsp_iov[2]; 2200 int resp_buftype[2]; 2201 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2202 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2203 int rc, flags = 0; 2204 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2205 struct cifs_open_parms oparms; 2206 struct smb2_query_directory_rsp *qd_rsp = NULL; 2207 struct smb2_create_rsp *op_rsp = NULL; 2208 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2209 int retry_count = 0; 2210 2211 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2212 if (!utf16_path) 2213 return -ENOMEM; 2214 2215 if (smb3_encryption_required(tcon)) 2216 flags |= CIFS_TRANSFORM_REQ; 2217 2218 memset(rqst, 0, sizeof(rqst)); 2219 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2220 memset(rsp_iov, 0, sizeof(rsp_iov)); 2221 2222 /* Open */ 2223 memset(&open_iov, 0, sizeof(open_iov)); 2224 rqst[0].rq_iov = open_iov; 2225 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2226 2227 oparms = (struct cifs_open_parms) { 2228 .tcon = tcon, 2229 .path = path, 2230 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2231 .disposition = FILE_OPEN, 2232 .create_options = cifs_create_options(cifs_sb, 0), 2233 .fid = fid, 2234 }; 2235 2236 rc = SMB2_open_init(tcon, server, 2237 &rqst[0], &oplock, &oparms, utf16_path); 2238 if (rc) 2239 goto qdf_free; 2240 smb2_set_next_command(tcon, &rqst[0]); 2241 2242 /* Query directory */ 2243 srch_inf->entries_in_buffer = 0; 2244 srch_inf->index_of_last_entry = 2; 2245 2246 memset(&qd_iov, 0, sizeof(qd_iov)); 2247 rqst[1].rq_iov = qd_iov; 2248 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2249 2250 rc = SMB2_query_directory_init(xid, tcon, server, 2251 &rqst[1], 2252 COMPOUND_FID, COMPOUND_FID, 2253 0, srch_inf->info_level); 2254 if (rc) 2255 goto qdf_free; 2256 2257 smb2_set_related(&rqst[1]); 2258 2259 again: 2260 rc = compound_send_recv(xid, tcon->ses, server, 2261 flags, 2, rqst, 2262 resp_buftype, rsp_iov); 2263 2264 if (rc == -EAGAIN && retry_count++ < 10) 2265 goto again; 2266 2267 /* If the open failed there is nothing to do */ 2268 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2269 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2270 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2271 goto qdf_free; 2272 } 2273 fid->persistent_fid = op_rsp->PersistentFileId; 2274 fid->volatile_fid = op_rsp->VolatileFileId; 2275 2276 /* Anything else than ENODATA means a genuine error */ 2277 if (rc && rc != -ENODATA) { 2278 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2279 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2280 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2281 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2282 goto qdf_free; 2283 } 2284 2285 atomic_inc(&tcon->num_remote_opens); 2286 2287 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2288 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2289 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2290 tcon->tid, tcon->ses->Suid, 0, 0); 2291 srch_inf->endOfSearch = true; 2292 rc = 0; 2293 goto qdf_free; 2294 } 2295 2296 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2297 srch_inf); 2298 if (rc) { 2299 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2300 tcon->ses->Suid, 0, 0, rc); 2301 goto qdf_free; 2302 } 2303 resp_buftype[1] = CIFS_NO_BUFFER; 2304 2305 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2306 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2307 2308 qdf_free: 2309 kfree(utf16_path); 2310 SMB2_open_free(&rqst[0]); 2311 SMB2_query_directory_free(&rqst[1]); 2312 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2313 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2314 return rc; 2315 } 2316 2317 static int 2318 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2319 struct cifs_fid *fid, __u16 search_flags, 2320 struct cifs_search_info *srch_inf) 2321 { 2322 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2323 fid->volatile_fid, 0, srch_inf); 2324 } 2325 2326 static int 2327 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2328 struct cifs_fid *fid) 2329 { 2330 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2331 } 2332 2333 /* 2334 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2335 * the number of credits and return true. Otherwise - return false. 2336 */ 2337 static bool 2338 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2339 { 2340 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2341 int scredits, in_flight; 2342 2343 if (shdr->Status != STATUS_PENDING) 2344 return false; 2345 2346 if (shdr->CreditRequest) { 2347 spin_lock(&server->req_lock); 2348 server->credits += le16_to_cpu(shdr->CreditRequest); 2349 scredits = server->credits; 2350 in_flight = server->in_flight; 2351 spin_unlock(&server->req_lock); 2352 wake_up(&server->request_q); 2353 2354 trace_smb3_pend_credits(server->CurrentMid, 2355 server->conn_id, server->hostname, scredits, 2356 le16_to_cpu(shdr->CreditRequest), in_flight); 2357 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2358 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2359 } 2360 2361 return true; 2362 } 2363 2364 static bool 2365 smb2_is_session_expired(char *buf) 2366 { 2367 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2368 2369 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2370 shdr->Status != STATUS_USER_SESSION_DELETED) 2371 return false; 2372 2373 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2374 le64_to_cpu(shdr->SessionId), 2375 le16_to_cpu(shdr->Command), 2376 le64_to_cpu(shdr->MessageId)); 2377 cifs_dbg(FYI, "Session expired or deleted\n"); 2378 2379 return true; 2380 } 2381 2382 static bool 2383 smb2_is_status_io_timeout(char *buf) 2384 { 2385 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2386 2387 if (shdr->Status == STATUS_IO_TIMEOUT) 2388 return true; 2389 else 2390 return false; 2391 } 2392 2393 static void 2394 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2395 { 2396 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2397 struct TCP_Server_Info *pserver; 2398 struct cifs_ses *ses; 2399 struct cifs_tcon *tcon; 2400 2401 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2402 return; 2403 2404 /* If server is a channel, select the primary channel */ 2405 pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server; 2406 2407 spin_lock(&cifs_tcp_ses_lock); 2408 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2409 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2410 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2411 spin_lock(&tcon->tc_lock); 2412 tcon->need_reconnect = true; 2413 spin_unlock(&tcon->tc_lock); 2414 spin_unlock(&cifs_tcp_ses_lock); 2415 pr_warn_once("Server share %s deleted.\n", 2416 tcon->tree_name); 2417 return; 2418 } 2419 } 2420 } 2421 spin_unlock(&cifs_tcp_ses_lock); 2422 } 2423 2424 static int 2425 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2426 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2427 { 2428 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2429 return SMB2_lease_break(0, tcon, cinode->lease_key, 2430 smb2_get_lease_state(cinode)); 2431 2432 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2433 CIFS_CACHE_READ(cinode) ? 1 : 0); 2434 } 2435 2436 void 2437 smb2_set_related(struct smb_rqst *rqst) 2438 { 2439 struct smb2_hdr *shdr; 2440 2441 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2442 if (shdr == NULL) { 2443 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2444 return; 2445 } 2446 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2447 } 2448 2449 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2450 2451 void 2452 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2453 { 2454 struct smb2_hdr *shdr; 2455 struct cifs_ses *ses = tcon->ses; 2456 struct TCP_Server_Info *server = ses->server; 2457 unsigned long len = smb_rqst_len(server, rqst); 2458 int i, num_padding; 2459 2460 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2461 if (shdr == NULL) { 2462 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2463 return; 2464 } 2465 2466 /* SMB headers in a compound are 8 byte aligned. */ 2467 2468 /* No padding needed */ 2469 if (!(len & 7)) 2470 goto finished; 2471 2472 num_padding = 8 - (len & 7); 2473 if (!smb3_encryption_required(tcon)) { 2474 /* 2475 * If we do not have encryption then we can just add an extra 2476 * iov for the padding. 2477 */ 2478 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2479 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2480 rqst->rq_nvec++; 2481 len += num_padding; 2482 } else { 2483 /* 2484 * We can not add a small padding iov for the encryption case 2485 * because the encryption framework can not handle the padding 2486 * iovs. 2487 * We have to flatten this into a single buffer and add 2488 * the padding to it. 2489 */ 2490 for (i = 1; i < rqst->rq_nvec; i++) { 2491 memcpy(rqst->rq_iov[0].iov_base + 2492 rqst->rq_iov[0].iov_len, 2493 rqst->rq_iov[i].iov_base, 2494 rqst->rq_iov[i].iov_len); 2495 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2496 } 2497 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2498 0, num_padding); 2499 rqst->rq_iov[0].iov_len += num_padding; 2500 len += num_padding; 2501 rqst->rq_nvec = 1; 2502 } 2503 2504 finished: 2505 shdr->NextCommand = cpu_to_le32(len); 2506 } 2507 2508 /* 2509 * Passes the query info response back to the caller on success. 2510 * Caller need to free this with free_rsp_buf(). 2511 */ 2512 int 2513 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2514 const char *path, u32 desired_access, 2515 u32 class, u32 type, u32 output_len, 2516 struct kvec *rsp, int *buftype, 2517 struct cifs_sb_info *cifs_sb) 2518 { 2519 struct cifs_ses *ses = tcon->ses; 2520 struct TCP_Server_Info *server = cifs_pick_channel(ses); 2521 int flags = CIFS_CP_CREATE_CLOSE_OP; 2522 struct smb_rqst rqst[3]; 2523 int resp_buftype[3]; 2524 struct kvec rsp_iov[3]; 2525 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2526 struct kvec qi_iov[1]; 2527 struct kvec close_iov[1]; 2528 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2529 struct cifs_open_parms oparms; 2530 struct cifs_fid fid; 2531 int rc; 2532 __le16 *utf16_path; 2533 struct cached_fid *cfid = NULL; 2534 2535 if (!path) 2536 path = ""; 2537 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2538 if (!utf16_path) 2539 return -ENOMEM; 2540 2541 if (smb3_encryption_required(tcon)) 2542 flags |= CIFS_TRANSFORM_REQ; 2543 2544 memset(rqst, 0, sizeof(rqst)); 2545 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2546 memset(rsp_iov, 0, sizeof(rsp_iov)); 2547 2548 /* 2549 * We can only call this for things we know are directories. 2550 */ 2551 if (!strcmp(path, "")) 2552 open_cached_dir(xid, tcon, path, cifs_sb, false, 2553 &cfid); /* cfid null if open dir failed */ 2554 2555 memset(&open_iov, 0, sizeof(open_iov)); 2556 rqst[0].rq_iov = open_iov; 2557 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2558 2559 oparms = (struct cifs_open_parms) { 2560 .tcon = tcon, 2561 .path = path, 2562 .desired_access = desired_access, 2563 .disposition = FILE_OPEN, 2564 .create_options = cifs_create_options(cifs_sb, 0), 2565 .fid = &fid, 2566 }; 2567 2568 rc = SMB2_open_init(tcon, server, 2569 &rqst[0], &oplock, &oparms, utf16_path); 2570 if (rc) 2571 goto qic_exit; 2572 smb2_set_next_command(tcon, &rqst[0]); 2573 2574 memset(&qi_iov, 0, sizeof(qi_iov)); 2575 rqst[1].rq_iov = qi_iov; 2576 rqst[1].rq_nvec = 1; 2577 2578 if (cfid) { 2579 rc = SMB2_query_info_init(tcon, server, 2580 &rqst[1], 2581 cfid->fid.persistent_fid, 2582 cfid->fid.volatile_fid, 2583 class, type, 0, 2584 output_len, 0, 2585 NULL); 2586 } else { 2587 rc = SMB2_query_info_init(tcon, server, 2588 &rqst[1], 2589 COMPOUND_FID, 2590 COMPOUND_FID, 2591 class, type, 0, 2592 output_len, 0, 2593 NULL); 2594 } 2595 if (rc) 2596 goto qic_exit; 2597 if (!cfid) { 2598 smb2_set_next_command(tcon, &rqst[1]); 2599 smb2_set_related(&rqst[1]); 2600 } 2601 2602 memset(&close_iov, 0, sizeof(close_iov)); 2603 rqst[2].rq_iov = close_iov; 2604 rqst[2].rq_nvec = 1; 2605 2606 rc = SMB2_close_init(tcon, server, 2607 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2608 if (rc) 2609 goto qic_exit; 2610 smb2_set_related(&rqst[2]); 2611 2612 if (cfid) { 2613 rc = compound_send_recv(xid, ses, server, 2614 flags, 1, &rqst[1], 2615 &resp_buftype[1], &rsp_iov[1]); 2616 } else { 2617 rc = compound_send_recv(xid, ses, server, 2618 flags, 3, rqst, 2619 resp_buftype, rsp_iov); 2620 } 2621 if (rc) { 2622 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2623 if (rc == -EREMCHG) { 2624 tcon->need_reconnect = true; 2625 pr_warn_once("server share %s deleted\n", 2626 tcon->tree_name); 2627 } 2628 goto qic_exit; 2629 } 2630 *rsp = rsp_iov[1]; 2631 *buftype = resp_buftype[1]; 2632 2633 qic_exit: 2634 kfree(utf16_path); 2635 SMB2_open_free(&rqst[0]); 2636 SMB2_query_info_free(&rqst[1]); 2637 SMB2_close_free(&rqst[2]); 2638 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2639 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2640 if (cfid) 2641 close_cached_dir(cfid); 2642 return rc; 2643 } 2644 2645 static int 2646 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2647 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2648 { 2649 struct smb2_query_info_rsp *rsp; 2650 struct smb2_fs_full_size_info *info = NULL; 2651 struct kvec rsp_iov = {NULL, 0}; 2652 int buftype = CIFS_NO_BUFFER; 2653 int rc; 2654 2655 2656 rc = smb2_query_info_compound(xid, tcon, "", 2657 FILE_READ_ATTRIBUTES, 2658 FS_FULL_SIZE_INFORMATION, 2659 SMB2_O_INFO_FILESYSTEM, 2660 sizeof(struct smb2_fs_full_size_info), 2661 &rsp_iov, &buftype, cifs_sb); 2662 if (rc) 2663 goto qfs_exit; 2664 2665 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2666 buf->f_type = SMB2_SUPER_MAGIC; 2667 info = (struct smb2_fs_full_size_info *)( 2668 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2669 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2670 le32_to_cpu(rsp->OutputBufferLength), 2671 &rsp_iov, 2672 sizeof(struct smb2_fs_full_size_info)); 2673 if (!rc) 2674 smb2_copy_fs_info_to_kstatfs(info, buf); 2675 2676 qfs_exit: 2677 free_rsp_buf(buftype, rsp_iov.iov_base); 2678 return rc; 2679 } 2680 2681 static int 2682 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2683 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2684 { 2685 int rc; 2686 __le16 srch_path = 0; /* Null - open root of share */ 2687 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2688 struct cifs_open_parms oparms; 2689 struct cifs_fid fid; 2690 2691 if (!tcon->posix_extensions) 2692 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2693 2694 oparms = (struct cifs_open_parms) { 2695 .tcon = tcon, 2696 .path = "", 2697 .desired_access = FILE_READ_ATTRIBUTES, 2698 .disposition = FILE_OPEN, 2699 .create_options = cifs_create_options(cifs_sb, 0), 2700 .fid = &fid, 2701 }; 2702 2703 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2704 NULL, NULL); 2705 if (rc) 2706 return rc; 2707 2708 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2709 fid.volatile_fid, buf); 2710 buf->f_type = SMB2_SUPER_MAGIC; 2711 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2712 return rc; 2713 } 2714 2715 static bool 2716 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2717 { 2718 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2719 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2720 } 2721 2722 static int 2723 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2724 __u64 length, __u32 type, int lock, int unlock, bool wait) 2725 { 2726 if (unlock && !lock) 2727 type = SMB2_LOCKFLAG_UNLOCK; 2728 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2729 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2730 current->tgid, length, offset, type, wait); 2731 } 2732 2733 static void 2734 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2735 { 2736 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2737 } 2738 2739 static void 2740 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2741 { 2742 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2743 } 2744 2745 static void 2746 smb2_new_lease_key(struct cifs_fid *fid) 2747 { 2748 generate_random_uuid(fid->lease_key); 2749 } 2750 2751 static int 2752 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2753 const char *search_name, 2754 struct dfs_info3_param **target_nodes, 2755 unsigned int *num_of_nodes, 2756 const struct nls_table *nls_codepage, int remap) 2757 { 2758 int rc; 2759 __le16 *utf16_path = NULL; 2760 int utf16_path_len = 0; 2761 struct cifs_tcon *tcon; 2762 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2763 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2764 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2765 int retry_count = 0; 2766 2767 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2768 2769 /* 2770 * Try to use the IPC tcon, otherwise just use any 2771 */ 2772 tcon = ses->tcon_ipc; 2773 if (tcon == NULL) { 2774 spin_lock(&cifs_tcp_ses_lock); 2775 tcon = list_first_entry_or_null(&ses->tcon_list, 2776 struct cifs_tcon, 2777 tcon_list); 2778 if (tcon) 2779 tcon->tc_count++; 2780 spin_unlock(&cifs_tcp_ses_lock); 2781 } 2782 2783 if (tcon == NULL) { 2784 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2785 ses); 2786 rc = -ENOTCONN; 2787 goto out; 2788 } 2789 2790 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2791 &utf16_path_len, 2792 nls_codepage, remap); 2793 if (!utf16_path) { 2794 rc = -ENOMEM; 2795 goto out; 2796 } 2797 2798 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2799 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2800 if (!dfs_req) { 2801 rc = -ENOMEM; 2802 goto out; 2803 } 2804 2805 /* Highest DFS referral version understood */ 2806 dfs_req->MaxReferralLevel = DFS_VERSION; 2807 2808 /* Path to resolve in an UTF-16 null-terminated string */ 2809 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2810 2811 do { 2812 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2813 FSCTL_DFS_GET_REFERRALS, 2814 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2815 (char **)&dfs_rsp, &dfs_rsp_size); 2816 if (!is_retryable_error(rc)) 2817 break; 2818 usleep_range(512, 2048); 2819 } while (++retry_count < 5); 2820 2821 if (rc) { 2822 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2823 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2824 goto out; 2825 } 2826 2827 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2828 num_of_nodes, target_nodes, 2829 nls_codepage, remap, search_name, 2830 true /* is_unicode */); 2831 if (rc) { 2832 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2833 goto out; 2834 } 2835 2836 out: 2837 if (tcon && !tcon->ipc) { 2838 /* ipc tcons are not refcounted */ 2839 spin_lock(&cifs_tcp_ses_lock); 2840 tcon->tc_count--; 2841 /* tc_count can never go negative */ 2842 WARN_ON(tcon->tc_count < 0); 2843 spin_unlock(&cifs_tcp_ses_lock); 2844 } 2845 kfree(utf16_path); 2846 kfree(dfs_req); 2847 kfree(dfs_rsp); 2848 return rc; 2849 } 2850 2851 static int 2852 parse_reparse_posix(struct reparse_posix_data *symlink_buf, 2853 u32 plen, char **target_path, 2854 struct cifs_sb_info *cifs_sb) 2855 { 2856 unsigned int len; 2857 2858 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2859 len = le16_to_cpu(symlink_buf->ReparseDataLength); 2860 2861 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) { 2862 cifs_dbg(VFS, "%lld not a supported symlink type\n", 2863 le64_to_cpu(symlink_buf->InodeType)); 2864 return -EOPNOTSUPP; 2865 } 2866 2867 *target_path = cifs_strndup_from_utf16( 2868 symlink_buf->PathBuffer, 2869 len, true, cifs_sb->local_nls); 2870 if (!(*target_path)) 2871 return -ENOMEM; 2872 2873 convert_delimiter(*target_path, '/'); 2874 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); 2875 2876 return 0; 2877 } 2878 2879 static int 2880 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf, 2881 u32 plen, char **target_path, 2882 struct cifs_sb_info *cifs_sb) 2883 { 2884 unsigned int sub_len; 2885 unsigned int sub_offset; 2886 2887 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 2888 2889 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset); 2890 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength); 2891 if (sub_offset + 20 > plen || 2892 sub_offset + sub_len + 20 > plen) { 2893 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 2894 return -EIO; 2895 } 2896 2897 *target_path = cifs_strndup_from_utf16( 2898 symlink_buf->PathBuffer + sub_offset, 2899 sub_len, true, cifs_sb->local_nls); 2900 if (!(*target_path)) 2901 return -ENOMEM; 2902 2903 convert_delimiter(*target_path, '/'); 2904 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); 2905 2906 return 0; 2907 } 2908 2909 static int 2910 parse_reparse_point(struct reparse_data_buffer *buf, 2911 u32 plen, char **target_path, 2912 struct cifs_sb_info *cifs_sb) 2913 { 2914 if (plen < sizeof(struct reparse_data_buffer)) { 2915 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n", 2916 plen); 2917 return -EIO; 2918 } 2919 2920 if (plen < le16_to_cpu(buf->ReparseDataLength) + 2921 sizeof(struct reparse_data_buffer)) { 2922 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n", 2923 plen); 2924 return -EIO; 2925 } 2926 2927 /* See MS-FSCC 2.1.2 */ 2928 switch (le32_to_cpu(buf->ReparseTag)) { 2929 case IO_REPARSE_TAG_NFS: 2930 return parse_reparse_posix( 2931 (struct reparse_posix_data *)buf, 2932 plen, target_path, cifs_sb); 2933 case IO_REPARSE_TAG_SYMLINK: 2934 return parse_reparse_symlink( 2935 (struct reparse_symlink_data_buffer *)buf, 2936 plen, target_path, cifs_sb); 2937 default: 2938 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n", 2939 le32_to_cpu(buf->ReparseTag)); 2940 return -EOPNOTSUPP; 2941 } 2942 } 2943 2944 static int 2945 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, 2946 struct cifs_sb_info *cifs_sb, const char *full_path, 2947 char **target_path, bool is_reparse_point) 2948 { 2949 int rc; 2950 __le16 *utf16_path = NULL; 2951 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2952 struct cifs_open_parms oparms; 2953 struct cifs_fid fid; 2954 struct kvec err_iov = {NULL, 0}; 2955 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2956 int flags = CIFS_CP_CREATE_CLOSE_OP; 2957 struct smb_rqst rqst[3]; 2958 int resp_buftype[3]; 2959 struct kvec rsp_iov[3]; 2960 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2961 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 2962 struct kvec close_iov[1]; 2963 struct smb2_create_rsp *create_rsp; 2964 struct smb2_ioctl_rsp *ioctl_rsp; 2965 struct reparse_data_buffer *reparse_buf; 2966 int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0; 2967 u32 plen; 2968 2969 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 2970 2971 *target_path = NULL; 2972 2973 if (smb3_encryption_required(tcon)) 2974 flags |= CIFS_TRANSFORM_REQ; 2975 2976 memset(rqst, 0, sizeof(rqst)); 2977 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2978 memset(rsp_iov, 0, sizeof(rsp_iov)); 2979 2980 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 2981 if (!utf16_path) 2982 return -ENOMEM; 2983 2984 /* Open */ 2985 memset(&open_iov, 0, sizeof(open_iov)); 2986 rqst[0].rq_iov = open_iov; 2987 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2988 2989 oparms = (struct cifs_open_parms) { 2990 .tcon = tcon, 2991 .path = full_path, 2992 .desired_access = FILE_READ_ATTRIBUTES, 2993 .disposition = FILE_OPEN, 2994 .create_options = cifs_create_options(cifs_sb, create_options), 2995 .fid = &fid, 2996 }; 2997 2998 rc = SMB2_open_init(tcon, server, 2999 &rqst[0], &oplock, &oparms, utf16_path); 3000 if (rc) 3001 goto querty_exit; 3002 smb2_set_next_command(tcon, &rqst[0]); 3003 3004 3005 /* IOCTL */ 3006 memset(&io_iov, 0, sizeof(io_iov)); 3007 rqst[1].rq_iov = io_iov; 3008 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 3009 3010 rc = SMB2_ioctl_init(tcon, server, 3011 &rqst[1], fid.persistent_fid, 3012 fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0, 3013 CIFSMaxBufSize - 3014 MAX_SMB2_CREATE_RESPONSE_SIZE - 3015 MAX_SMB2_CLOSE_RESPONSE_SIZE); 3016 if (rc) 3017 goto querty_exit; 3018 3019 smb2_set_next_command(tcon, &rqst[1]); 3020 smb2_set_related(&rqst[1]); 3021 3022 3023 /* Close */ 3024 memset(&close_iov, 0, sizeof(close_iov)); 3025 rqst[2].rq_iov = close_iov; 3026 rqst[2].rq_nvec = 1; 3027 3028 rc = SMB2_close_init(tcon, server, 3029 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 3030 if (rc) 3031 goto querty_exit; 3032 3033 smb2_set_related(&rqst[2]); 3034 3035 rc = compound_send_recv(xid, tcon->ses, server, 3036 flags, 3, rqst, 3037 resp_buftype, rsp_iov); 3038 3039 create_rsp = rsp_iov[0].iov_base; 3040 if (create_rsp && create_rsp->hdr.Status) 3041 err_iov = rsp_iov[0]; 3042 ioctl_rsp = rsp_iov[1].iov_base; 3043 3044 /* 3045 * Open was successful and we got an ioctl response. 3046 */ 3047 if ((rc == 0) && (is_reparse_point)) { 3048 /* See MS-FSCC 2.3.23 */ 3049 3050 reparse_buf = (struct reparse_data_buffer *) 3051 ((char *)ioctl_rsp + 3052 le32_to_cpu(ioctl_rsp->OutputOffset)); 3053 plen = le32_to_cpu(ioctl_rsp->OutputCount); 3054 3055 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) > 3056 rsp_iov[1].iov_len) { 3057 cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n", 3058 plen); 3059 rc = -EIO; 3060 goto querty_exit; 3061 } 3062 3063 rc = parse_reparse_point(reparse_buf, plen, target_path, 3064 cifs_sb); 3065 goto querty_exit; 3066 } 3067 3068 if (!rc || !err_iov.iov_base) { 3069 rc = -ENOENT; 3070 goto querty_exit; 3071 } 3072 3073 rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path); 3074 3075 querty_exit: 3076 cifs_dbg(FYI, "query symlink rc %d\n", rc); 3077 kfree(utf16_path); 3078 SMB2_open_free(&rqst[0]); 3079 SMB2_ioctl_free(&rqst[1]); 3080 SMB2_close_free(&rqst[2]); 3081 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 3082 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 3083 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 3084 return rc; 3085 } 3086 3087 int 3088 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon, 3089 struct cifs_sb_info *cifs_sb, const char *full_path, 3090 __u32 *tag) 3091 { 3092 int rc; 3093 __le16 *utf16_path = NULL; 3094 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3095 struct cifs_open_parms oparms; 3096 struct cifs_fid fid; 3097 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 3098 int flags = CIFS_CP_CREATE_CLOSE_OP; 3099 struct smb_rqst rqst[3]; 3100 int resp_buftype[3]; 3101 struct kvec rsp_iov[3]; 3102 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 3103 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; 3104 struct kvec close_iov[1]; 3105 struct smb2_ioctl_rsp *ioctl_rsp; 3106 struct reparse_data_buffer *reparse_buf; 3107 u32 plen; 3108 3109 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 3110 3111 if (smb3_encryption_required(tcon)) 3112 flags |= CIFS_TRANSFORM_REQ; 3113 3114 memset(rqst, 0, sizeof(rqst)); 3115 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 3116 memset(rsp_iov, 0, sizeof(rsp_iov)); 3117 3118 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 3119 if (!utf16_path) 3120 return -ENOMEM; 3121 3122 /* 3123 * setup smb2open - TODO add optimization to call cifs_get_readable_path 3124 * to see if there is a handle already open that we can use 3125 */ 3126 memset(&open_iov, 0, sizeof(open_iov)); 3127 rqst[0].rq_iov = open_iov; 3128 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 3129 3130 oparms = (struct cifs_open_parms) { 3131 .tcon = tcon, 3132 .path = full_path, 3133 .desired_access = FILE_READ_ATTRIBUTES, 3134 .disposition = FILE_OPEN, 3135 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT), 3136 .fid = &fid, 3137 }; 3138 3139 rc = SMB2_open_init(tcon, server, 3140 &rqst[0], &oplock, &oparms, utf16_path); 3141 if (rc) 3142 goto query_rp_exit; 3143 smb2_set_next_command(tcon, &rqst[0]); 3144 3145 3146 /* IOCTL */ 3147 memset(&io_iov, 0, sizeof(io_iov)); 3148 rqst[1].rq_iov = io_iov; 3149 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 3150 3151 rc = SMB2_ioctl_init(tcon, server, 3152 &rqst[1], COMPOUND_FID, 3153 COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0, 3154 CIFSMaxBufSize - 3155 MAX_SMB2_CREATE_RESPONSE_SIZE - 3156 MAX_SMB2_CLOSE_RESPONSE_SIZE); 3157 if (rc) 3158 goto query_rp_exit; 3159 3160 smb2_set_next_command(tcon, &rqst[1]); 3161 smb2_set_related(&rqst[1]); 3162 3163 3164 /* Close */ 3165 memset(&close_iov, 0, sizeof(close_iov)); 3166 rqst[2].rq_iov = close_iov; 3167 rqst[2].rq_nvec = 1; 3168 3169 rc = SMB2_close_init(tcon, server, 3170 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 3171 if (rc) 3172 goto query_rp_exit; 3173 3174 smb2_set_related(&rqst[2]); 3175 3176 rc = compound_send_recv(xid, tcon->ses, server, 3177 flags, 3, rqst, 3178 resp_buftype, rsp_iov); 3179 3180 ioctl_rsp = rsp_iov[1].iov_base; 3181 3182 /* 3183 * Open was successful and we got an ioctl response. 3184 */ 3185 if (rc == 0) { 3186 /* See MS-FSCC 2.3.23 */ 3187 3188 reparse_buf = (struct reparse_data_buffer *) 3189 ((char *)ioctl_rsp + 3190 le32_to_cpu(ioctl_rsp->OutputOffset)); 3191 plen = le32_to_cpu(ioctl_rsp->OutputCount); 3192 3193 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) > 3194 rsp_iov[1].iov_len) { 3195 cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n", 3196 plen); 3197 rc = -EIO; 3198 goto query_rp_exit; 3199 } 3200 *tag = le32_to_cpu(reparse_buf->ReparseTag); 3201 } 3202 3203 query_rp_exit: 3204 kfree(utf16_path); 3205 SMB2_open_free(&rqst[0]); 3206 SMB2_ioctl_free(&rqst[1]); 3207 SMB2_close_free(&rqst[2]); 3208 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 3209 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 3210 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 3211 return rc; 3212 } 3213 3214 static struct cifs_ntsd * 3215 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3216 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3217 { 3218 struct cifs_ntsd *pntsd = NULL; 3219 unsigned int xid; 3220 int rc = -EOPNOTSUPP; 3221 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3222 3223 if (IS_ERR(tlink)) 3224 return ERR_CAST(tlink); 3225 3226 xid = get_xid(); 3227 cifs_dbg(FYI, "trying to get acl\n"); 3228 3229 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3230 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3231 info); 3232 free_xid(xid); 3233 3234 cifs_put_tlink(tlink); 3235 3236 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3237 if (rc) 3238 return ERR_PTR(rc); 3239 return pntsd; 3240 3241 } 3242 3243 static struct cifs_ntsd * 3244 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3245 const char *path, u32 *pacllen, u32 info) 3246 { 3247 struct cifs_ntsd *pntsd = NULL; 3248 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3249 unsigned int xid; 3250 int rc; 3251 struct cifs_tcon *tcon; 3252 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3253 struct cifs_fid fid; 3254 struct cifs_open_parms oparms; 3255 __le16 *utf16_path; 3256 3257 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3258 if (IS_ERR(tlink)) 3259 return ERR_CAST(tlink); 3260 3261 tcon = tlink_tcon(tlink); 3262 xid = get_xid(); 3263 3264 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3265 if (!utf16_path) { 3266 rc = -ENOMEM; 3267 free_xid(xid); 3268 return ERR_PTR(rc); 3269 } 3270 3271 oparms = (struct cifs_open_parms) { 3272 .tcon = tcon, 3273 .path = path, 3274 .desired_access = READ_CONTROL, 3275 .disposition = FILE_OPEN, 3276 /* 3277 * When querying an ACL, even if the file is a symlink 3278 * we want to open the source not the target, and so 3279 * the protocol requires that the client specify this 3280 * flag when opening a reparse point 3281 */ 3282 .create_options = cifs_create_options(cifs_sb, 0) | 3283 OPEN_REPARSE_POINT, 3284 .fid = &fid, 3285 }; 3286 3287 if (info & SACL_SECINFO) 3288 oparms.desired_access |= SYSTEM_SECURITY; 3289 3290 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3291 NULL); 3292 kfree(utf16_path); 3293 if (!rc) { 3294 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3295 fid.volatile_fid, (void **)&pntsd, pacllen, 3296 info); 3297 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3298 } 3299 3300 cifs_put_tlink(tlink); 3301 free_xid(xid); 3302 3303 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3304 if (rc) 3305 return ERR_PTR(rc); 3306 return pntsd; 3307 } 3308 3309 static int 3310 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3311 struct inode *inode, const char *path, int aclflag) 3312 { 3313 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3314 unsigned int xid; 3315 int rc, access_flags = 0; 3316 struct cifs_tcon *tcon; 3317 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3318 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3319 struct cifs_fid fid; 3320 struct cifs_open_parms oparms; 3321 __le16 *utf16_path; 3322 3323 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3324 if (IS_ERR(tlink)) 3325 return PTR_ERR(tlink); 3326 3327 tcon = tlink_tcon(tlink); 3328 xid = get_xid(); 3329 3330 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3331 access_flags |= WRITE_OWNER; 3332 if (aclflag & CIFS_ACL_SACL) 3333 access_flags |= SYSTEM_SECURITY; 3334 if (aclflag & CIFS_ACL_DACL) 3335 access_flags |= WRITE_DAC; 3336 3337 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3338 if (!utf16_path) { 3339 rc = -ENOMEM; 3340 free_xid(xid); 3341 return rc; 3342 } 3343 3344 oparms = (struct cifs_open_parms) { 3345 .tcon = tcon, 3346 .desired_access = access_flags, 3347 .create_options = cifs_create_options(cifs_sb, 0), 3348 .disposition = FILE_OPEN, 3349 .path = path, 3350 .fid = &fid, 3351 }; 3352 3353 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3354 NULL, NULL); 3355 kfree(utf16_path); 3356 if (!rc) { 3357 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3358 fid.volatile_fid, pnntsd, acllen, aclflag); 3359 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3360 } 3361 3362 cifs_put_tlink(tlink); 3363 free_xid(xid); 3364 return rc; 3365 } 3366 3367 /* Retrieve an ACL from the server */ 3368 static struct cifs_ntsd * 3369 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3370 struct inode *inode, const char *path, 3371 u32 *pacllen, u32 info) 3372 { 3373 struct cifs_ntsd *pntsd = NULL; 3374 struct cifsFileInfo *open_file = NULL; 3375 3376 if (inode && !(info & SACL_SECINFO)) 3377 open_file = find_readable_file(CIFS_I(inode), true); 3378 if (!open_file || (info & SACL_SECINFO)) 3379 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3380 3381 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3382 cifsFileInfo_put(open_file); 3383 return pntsd; 3384 } 3385 3386 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3387 loff_t offset, loff_t len, unsigned int xid) 3388 { 3389 struct cifsFileInfo *cfile = file->private_data; 3390 struct file_zero_data_information fsctl_buf; 3391 3392 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3393 3394 fsctl_buf.FileOffset = cpu_to_le64(offset); 3395 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3396 3397 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3398 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3399 (char *)&fsctl_buf, 3400 sizeof(struct file_zero_data_information), 3401 0, NULL, NULL); 3402 } 3403 3404 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3405 loff_t offset, loff_t len, bool keep_size) 3406 { 3407 struct cifs_ses *ses = tcon->ses; 3408 struct inode *inode = file_inode(file); 3409 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3410 struct cifsFileInfo *cfile = file->private_data; 3411 long rc; 3412 unsigned int xid; 3413 __le64 eof; 3414 3415 xid = get_xid(); 3416 3417 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3418 ses->Suid, offset, len); 3419 3420 inode_lock(inode); 3421 filemap_invalidate_lock(inode->i_mapping); 3422 3423 /* 3424 * We zero the range through ioctl, so we need remove the page caches 3425 * first, otherwise the data may be inconsistent with the server. 3426 */ 3427 truncate_pagecache_range(inode, offset, offset + len - 1); 3428 3429 /* if file not oplocked can't be sure whether asking to extend size */ 3430 rc = -EOPNOTSUPP; 3431 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3432 goto zero_range_exit; 3433 3434 rc = smb3_zero_data(file, tcon, offset, len, xid); 3435 if (rc < 0) 3436 goto zero_range_exit; 3437 3438 /* 3439 * do we also need to change the size of the file? 3440 */ 3441 if (keep_size == false && i_size_read(inode) < offset + len) { 3442 eof = cpu_to_le64(offset + len); 3443 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3444 cfile->fid.volatile_fid, cfile->pid, &eof); 3445 } 3446 3447 zero_range_exit: 3448 filemap_invalidate_unlock(inode->i_mapping); 3449 inode_unlock(inode); 3450 free_xid(xid); 3451 if (rc) 3452 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3453 ses->Suid, offset, len, rc); 3454 else 3455 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3456 ses->Suid, offset, len); 3457 return rc; 3458 } 3459 3460 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3461 loff_t offset, loff_t len) 3462 { 3463 struct inode *inode = file_inode(file); 3464 struct cifsFileInfo *cfile = file->private_data; 3465 struct file_zero_data_information fsctl_buf; 3466 long rc; 3467 unsigned int xid; 3468 __u8 set_sparse = 1; 3469 3470 xid = get_xid(); 3471 3472 inode_lock(inode); 3473 /* Need to make file sparse, if not already, before freeing range. */ 3474 /* Consider adding equivalent for compressed since it could also work */ 3475 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3476 rc = -EOPNOTSUPP; 3477 goto out; 3478 } 3479 3480 filemap_invalidate_lock(inode->i_mapping); 3481 /* 3482 * We implement the punch hole through ioctl, so we need remove the page 3483 * caches first, otherwise the data may be inconsistent with the server. 3484 */ 3485 truncate_pagecache_range(inode, offset, offset + len - 1); 3486 3487 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3488 3489 fsctl_buf.FileOffset = cpu_to_le64(offset); 3490 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3491 3492 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3493 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3494 (char *)&fsctl_buf, 3495 sizeof(struct file_zero_data_information), 3496 CIFSMaxBufSize, NULL, NULL); 3497 filemap_invalidate_unlock(inode->i_mapping); 3498 out: 3499 inode_unlock(inode); 3500 free_xid(xid); 3501 return rc; 3502 } 3503 3504 static int smb3_simple_fallocate_write_range(unsigned int xid, 3505 struct cifs_tcon *tcon, 3506 struct cifsFileInfo *cfile, 3507 loff_t off, loff_t len, 3508 char *buf) 3509 { 3510 struct cifs_io_parms io_parms = {0}; 3511 int nbytes; 3512 int rc = 0; 3513 struct kvec iov[2]; 3514 3515 io_parms.netfid = cfile->fid.netfid; 3516 io_parms.pid = current->tgid; 3517 io_parms.tcon = tcon; 3518 io_parms.persistent_fid = cfile->fid.persistent_fid; 3519 io_parms.volatile_fid = cfile->fid.volatile_fid; 3520 3521 while (len) { 3522 io_parms.offset = off; 3523 io_parms.length = len; 3524 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3525 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3526 /* iov[0] is reserved for smb header */ 3527 iov[1].iov_base = buf; 3528 iov[1].iov_len = io_parms.length; 3529 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3530 if (rc) 3531 break; 3532 if (nbytes > len) 3533 return -EINVAL; 3534 buf += nbytes; 3535 off += nbytes; 3536 len -= nbytes; 3537 } 3538 return rc; 3539 } 3540 3541 static int smb3_simple_fallocate_range(unsigned int xid, 3542 struct cifs_tcon *tcon, 3543 struct cifsFileInfo *cfile, 3544 loff_t off, loff_t len) 3545 { 3546 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3547 u32 out_data_len; 3548 char *buf = NULL; 3549 loff_t l; 3550 int rc; 3551 3552 in_data.file_offset = cpu_to_le64(off); 3553 in_data.length = cpu_to_le64(len); 3554 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3555 cfile->fid.volatile_fid, 3556 FSCTL_QUERY_ALLOCATED_RANGES, 3557 (char *)&in_data, sizeof(in_data), 3558 1024 * sizeof(struct file_allocated_range_buffer), 3559 (char **)&out_data, &out_data_len); 3560 if (rc) 3561 goto out; 3562 3563 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3564 if (buf == NULL) { 3565 rc = -ENOMEM; 3566 goto out; 3567 } 3568 3569 tmp_data = out_data; 3570 while (len) { 3571 /* 3572 * The rest of the region is unmapped so write it all. 3573 */ 3574 if (out_data_len == 0) { 3575 rc = smb3_simple_fallocate_write_range(xid, tcon, 3576 cfile, off, len, buf); 3577 goto out; 3578 } 3579 3580 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3581 rc = -EINVAL; 3582 goto out; 3583 } 3584 3585 if (off < le64_to_cpu(tmp_data->file_offset)) { 3586 /* 3587 * We are at a hole. Write until the end of the region 3588 * or until the next allocated data, 3589 * whichever comes next. 3590 */ 3591 l = le64_to_cpu(tmp_data->file_offset) - off; 3592 if (len < l) 3593 l = len; 3594 rc = smb3_simple_fallocate_write_range(xid, tcon, 3595 cfile, off, l, buf); 3596 if (rc) 3597 goto out; 3598 off = off + l; 3599 len = len - l; 3600 if (len == 0) 3601 goto out; 3602 } 3603 /* 3604 * We are at a section of allocated data, just skip forward 3605 * until the end of the data or the end of the region 3606 * we are supposed to fallocate, whichever comes first. 3607 */ 3608 l = le64_to_cpu(tmp_data->length); 3609 if (len < l) 3610 l = len; 3611 off += l; 3612 len -= l; 3613 3614 tmp_data = &tmp_data[1]; 3615 out_data_len -= sizeof(struct file_allocated_range_buffer); 3616 } 3617 3618 out: 3619 kfree(out_data); 3620 kfree(buf); 3621 return rc; 3622 } 3623 3624 3625 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3626 loff_t off, loff_t len, bool keep_size) 3627 { 3628 struct inode *inode; 3629 struct cifsInodeInfo *cifsi; 3630 struct cifsFileInfo *cfile = file->private_data; 3631 long rc = -EOPNOTSUPP; 3632 unsigned int xid; 3633 __le64 eof; 3634 3635 xid = get_xid(); 3636 3637 inode = d_inode(cfile->dentry); 3638 cifsi = CIFS_I(inode); 3639 3640 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3641 tcon->ses->Suid, off, len); 3642 /* if file not oplocked can't be sure whether asking to extend size */ 3643 if (!CIFS_CACHE_READ(cifsi)) 3644 if (keep_size == false) { 3645 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3646 tcon->tid, tcon->ses->Suid, off, len, rc); 3647 free_xid(xid); 3648 return rc; 3649 } 3650 3651 /* 3652 * Extending the file 3653 */ 3654 if ((keep_size == false) && i_size_read(inode) < off + len) { 3655 rc = inode_newsize_ok(inode, off + len); 3656 if (rc) 3657 goto out; 3658 3659 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3660 smb2_set_sparse(xid, tcon, cfile, inode, false); 3661 3662 eof = cpu_to_le64(off + len); 3663 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3664 cfile->fid.volatile_fid, cfile->pid, &eof); 3665 if (rc == 0) { 3666 cifsi->server_eof = off + len; 3667 cifs_setsize(inode, off + len); 3668 cifs_truncate_page(inode->i_mapping, inode->i_size); 3669 truncate_setsize(inode, off + len); 3670 } 3671 goto out; 3672 } 3673 3674 /* 3675 * Files are non-sparse by default so falloc may be a no-op 3676 * Must check if file sparse. If not sparse, and since we are not 3677 * extending then no need to do anything since file already allocated 3678 */ 3679 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3680 rc = 0; 3681 goto out; 3682 } 3683 3684 if (keep_size == true) { 3685 /* 3686 * We can not preallocate pages beyond the end of the file 3687 * in SMB2 3688 */ 3689 if (off >= i_size_read(inode)) { 3690 rc = 0; 3691 goto out; 3692 } 3693 /* 3694 * For fallocates that are partially beyond the end of file, 3695 * clamp len so we only fallocate up to the end of file. 3696 */ 3697 if (off + len > i_size_read(inode)) { 3698 len = i_size_read(inode) - off; 3699 } 3700 } 3701 3702 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3703 /* 3704 * At this point, we are trying to fallocate an internal 3705 * regions of a sparse file. Since smb2 does not have a 3706 * fallocate command we have two otions on how to emulate this. 3707 * We can either turn the entire file to become non-sparse 3708 * which we only do if the fallocate is for virtually 3709 * the whole file, or we can overwrite the region with zeroes 3710 * using SMB2_write, which could be prohibitevly expensive 3711 * if len is large. 3712 */ 3713 /* 3714 * We are only trying to fallocate a small region so 3715 * just write it with zero. 3716 */ 3717 if (len <= 1024 * 1024) { 3718 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3719 off, len); 3720 goto out; 3721 } 3722 3723 /* 3724 * Check if falloc starts within first few pages of file 3725 * and ends within a few pages of the end of file to 3726 * ensure that most of file is being forced to be 3727 * fallocated now. If so then setting whole file sparse 3728 * ie potentially making a few extra pages at the beginning 3729 * or end of the file non-sparse via set_sparse is harmless. 3730 */ 3731 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3732 rc = -EOPNOTSUPP; 3733 goto out; 3734 } 3735 } 3736 3737 smb2_set_sparse(xid, tcon, cfile, inode, false); 3738 rc = 0; 3739 3740 out: 3741 if (rc) 3742 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3743 tcon->ses->Suid, off, len, rc); 3744 else 3745 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3746 tcon->ses->Suid, off, len); 3747 3748 free_xid(xid); 3749 return rc; 3750 } 3751 3752 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3753 loff_t off, loff_t len) 3754 { 3755 int rc; 3756 unsigned int xid; 3757 struct inode *inode = file_inode(file); 3758 struct cifsFileInfo *cfile = file->private_data; 3759 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3760 __le64 eof; 3761 loff_t old_eof; 3762 3763 xid = get_xid(); 3764 3765 inode_lock(inode); 3766 3767 old_eof = i_size_read(inode); 3768 if ((off >= old_eof) || 3769 off + len >= old_eof) { 3770 rc = -EINVAL; 3771 goto out; 3772 } 3773 3774 filemap_invalidate_lock(inode->i_mapping); 3775 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3776 if (rc < 0) 3777 goto out_2; 3778 3779 truncate_pagecache_range(inode, off, old_eof); 3780 3781 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3782 old_eof - off - len, off); 3783 if (rc < 0) 3784 goto out_2; 3785 3786 eof = cpu_to_le64(old_eof - len); 3787 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3788 cfile->fid.volatile_fid, cfile->pid, &eof); 3789 if (rc < 0) 3790 goto out_2; 3791 3792 rc = 0; 3793 3794 cifsi->server_eof = i_size_read(inode) - len; 3795 truncate_setsize(inode, cifsi->server_eof); 3796 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3797 out_2: 3798 filemap_invalidate_unlock(inode->i_mapping); 3799 out: 3800 inode_unlock(inode); 3801 free_xid(xid); 3802 return rc; 3803 } 3804 3805 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3806 loff_t off, loff_t len) 3807 { 3808 int rc; 3809 unsigned int xid; 3810 struct cifsFileInfo *cfile = file->private_data; 3811 struct inode *inode = file_inode(file); 3812 __le64 eof; 3813 __u64 count, old_eof; 3814 3815 xid = get_xid(); 3816 3817 inode_lock(inode); 3818 3819 old_eof = i_size_read(inode); 3820 if (off >= old_eof) { 3821 rc = -EINVAL; 3822 goto out; 3823 } 3824 3825 count = old_eof - off; 3826 eof = cpu_to_le64(old_eof + len); 3827 3828 filemap_invalidate_lock(inode->i_mapping); 3829 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1); 3830 if (rc < 0) 3831 goto out_2; 3832 truncate_pagecache_range(inode, off, old_eof); 3833 3834 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3835 cfile->fid.volatile_fid, cfile->pid, &eof); 3836 if (rc < 0) 3837 goto out_2; 3838 3839 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3840 if (rc < 0) 3841 goto out_2; 3842 3843 rc = smb3_zero_data(file, tcon, off, len, xid); 3844 if (rc < 0) 3845 goto out_2; 3846 3847 rc = 0; 3848 out_2: 3849 filemap_invalidate_unlock(inode->i_mapping); 3850 out: 3851 inode_unlock(inode); 3852 free_xid(xid); 3853 return rc; 3854 } 3855 3856 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3857 { 3858 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3859 struct cifsInodeInfo *cifsi; 3860 struct inode *inode; 3861 int rc = 0; 3862 struct file_allocated_range_buffer in_data, *out_data = NULL; 3863 u32 out_data_len; 3864 unsigned int xid; 3865 3866 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3867 return generic_file_llseek(file, offset, whence); 3868 3869 inode = d_inode(cfile->dentry); 3870 cifsi = CIFS_I(inode); 3871 3872 if (offset < 0 || offset >= i_size_read(inode)) 3873 return -ENXIO; 3874 3875 xid = get_xid(); 3876 /* 3877 * We need to be sure that all dirty pages are written as they 3878 * might fill holes on the server. 3879 * Note that we also MUST flush any written pages since at least 3880 * some servers (Windows2016) will not reflect recent writes in 3881 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3882 */ 3883 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3884 if (wrcfile) { 3885 filemap_write_and_wait(inode->i_mapping); 3886 smb2_flush_file(xid, tcon, &wrcfile->fid); 3887 cifsFileInfo_put(wrcfile); 3888 } 3889 3890 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3891 if (whence == SEEK_HOLE) 3892 offset = i_size_read(inode); 3893 goto lseek_exit; 3894 } 3895 3896 in_data.file_offset = cpu_to_le64(offset); 3897 in_data.length = cpu_to_le64(i_size_read(inode)); 3898 3899 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3900 cfile->fid.volatile_fid, 3901 FSCTL_QUERY_ALLOCATED_RANGES, 3902 (char *)&in_data, sizeof(in_data), 3903 sizeof(struct file_allocated_range_buffer), 3904 (char **)&out_data, &out_data_len); 3905 if (rc == -E2BIG) 3906 rc = 0; 3907 if (rc) 3908 goto lseek_exit; 3909 3910 if (whence == SEEK_HOLE && out_data_len == 0) 3911 goto lseek_exit; 3912 3913 if (whence == SEEK_DATA && out_data_len == 0) { 3914 rc = -ENXIO; 3915 goto lseek_exit; 3916 } 3917 3918 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3919 rc = -EINVAL; 3920 goto lseek_exit; 3921 } 3922 if (whence == SEEK_DATA) { 3923 offset = le64_to_cpu(out_data->file_offset); 3924 goto lseek_exit; 3925 } 3926 if (offset < le64_to_cpu(out_data->file_offset)) 3927 goto lseek_exit; 3928 3929 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3930 3931 lseek_exit: 3932 free_xid(xid); 3933 kfree(out_data); 3934 if (!rc) 3935 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3936 else 3937 return rc; 3938 } 3939 3940 static int smb3_fiemap(struct cifs_tcon *tcon, 3941 struct cifsFileInfo *cfile, 3942 struct fiemap_extent_info *fei, u64 start, u64 len) 3943 { 3944 unsigned int xid; 3945 struct file_allocated_range_buffer in_data, *out_data; 3946 u32 out_data_len; 3947 int i, num, rc, flags, last_blob; 3948 u64 next; 3949 3950 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3951 if (rc) 3952 return rc; 3953 3954 xid = get_xid(); 3955 again: 3956 in_data.file_offset = cpu_to_le64(start); 3957 in_data.length = cpu_to_le64(len); 3958 3959 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3960 cfile->fid.volatile_fid, 3961 FSCTL_QUERY_ALLOCATED_RANGES, 3962 (char *)&in_data, sizeof(in_data), 3963 1024 * sizeof(struct file_allocated_range_buffer), 3964 (char **)&out_data, &out_data_len); 3965 if (rc == -E2BIG) { 3966 last_blob = 0; 3967 rc = 0; 3968 } else 3969 last_blob = 1; 3970 if (rc) 3971 goto out; 3972 3973 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3974 rc = -EINVAL; 3975 goto out; 3976 } 3977 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3978 rc = -EINVAL; 3979 goto out; 3980 } 3981 3982 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3983 for (i = 0; i < num; i++) { 3984 flags = 0; 3985 if (i == num - 1 && last_blob) 3986 flags |= FIEMAP_EXTENT_LAST; 3987 3988 rc = fiemap_fill_next_extent(fei, 3989 le64_to_cpu(out_data[i].file_offset), 3990 le64_to_cpu(out_data[i].file_offset), 3991 le64_to_cpu(out_data[i].length), 3992 flags); 3993 if (rc < 0) 3994 goto out; 3995 if (rc == 1) { 3996 rc = 0; 3997 goto out; 3998 } 3999 } 4000 4001 if (!last_blob) { 4002 next = le64_to_cpu(out_data[num - 1].file_offset) + 4003 le64_to_cpu(out_data[num - 1].length); 4004 len = len - (next - start); 4005 start = next; 4006 goto again; 4007 } 4008 4009 out: 4010 free_xid(xid); 4011 kfree(out_data); 4012 return rc; 4013 } 4014 4015 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 4016 loff_t off, loff_t len) 4017 { 4018 /* KEEP_SIZE already checked for by do_fallocate */ 4019 if (mode & FALLOC_FL_PUNCH_HOLE) 4020 return smb3_punch_hole(file, tcon, off, len); 4021 else if (mode & FALLOC_FL_ZERO_RANGE) { 4022 if (mode & FALLOC_FL_KEEP_SIZE) 4023 return smb3_zero_range(file, tcon, off, len, true); 4024 return smb3_zero_range(file, tcon, off, len, false); 4025 } else if (mode == FALLOC_FL_KEEP_SIZE) 4026 return smb3_simple_falloc(file, tcon, off, len, true); 4027 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 4028 return smb3_collapse_range(file, tcon, off, len); 4029 else if (mode == FALLOC_FL_INSERT_RANGE) 4030 return smb3_insert_range(file, tcon, off, len); 4031 else if (mode == 0) 4032 return smb3_simple_falloc(file, tcon, off, len, false); 4033 4034 return -EOPNOTSUPP; 4035 } 4036 4037 static void 4038 smb2_downgrade_oplock(struct TCP_Server_Info *server, 4039 struct cifsInodeInfo *cinode, __u32 oplock, 4040 unsigned int epoch, bool *purge_cache) 4041 { 4042 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 4043 } 4044 4045 static void 4046 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4047 unsigned int epoch, bool *purge_cache); 4048 4049 static void 4050 smb3_downgrade_oplock(struct TCP_Server_Info *server, 4051 struct cifsInodeInfo *cinode, __u32 oplock, 4052 unsigned int epoch, bool *purge_cache) 4053 { 4054 unsigned int old_state = cinode->oplock; 4055 unsigned int old_epoch = cinode->epoch; 4056 unsigned int new_state; 4057 4058 if (epoch > old_epoch) { 4059 smb21_set_oplock_level(cinode, oplock, 0, NULL); 4060 cinode->epoch = epoch; 4061 } 4062 4063 new_state = cinode->oplock; 4064 *purge_cache = false; 4065 4066 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 4067 (new_state & CIFS_CACHE_READ_FLG) == 0) 4068 *purge_cache = true; 4069 else if (old_state == new_state && (epoch - old_epoch > 1)) 4070 *purge_cache = true; 4071 } 4072 4073 static void 4074 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4075 unsigned int epoch, bool *purge_cache) 4076 { 4077 oplock &= 0xFF; 4078 cinode->lease_granted = false; 4079 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4080 return; 4081 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 4082 cinode->oplock = CIFS_CACHE_RHW_FLG; 4083 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 4084 &cinode->netfs.inode); 4085 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 4086 cinode->oplock = CIFS_CACHE_RW_FLG; 4087 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 4088 &cinode->netfs.inode); 4089 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 4090 cinode->oplock = CIFS_CACHE_READ_FLG; 4091 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 4092 &cinode->netfs.inode); 4093 } else 4094 cinode->oplock = 0; 4095 } 4096 4097 static void 4098 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4099 unsigned int epoch, bool *purge_cache) 4100 { 4101 char message[5] = {0}; 4102 unsigned int new_oplock = 0; 4103 4104 oplock &= 0xFF; 4105 cinode->lease_granted = true; 4106 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4107 return; 4108 4109 /* Check if the server granted an oplock rather than a lease */ 4110 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4111 return smb2_set_oplock_level(cinode, oplock, epoch, 4112 purge_cache); 4113 4114 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4115 new_oplock |= CIFS_CACHE_READ_FLG; 4116 strcat(message, "R"); 4117 } 4118 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4119 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4120 strcat(message, "H"); 4121 } 4122 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4123 new_oplock |= CIFS_CACHE_WRITE_FLG; 4124 strcat(message, "W"); 4125 } 4126 if (!new_oplock) 4127 strncpy(message, "None", sizeof(message)); 4128 4129 cinode->oplock = new_oplock; 4130 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4131 &cinode->netfs.inode); 4132 } 4133 4134 static void 4135 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4136 unsigned int epoch, bool *purge_cache) 4137 { 4138 unsigned int old_oplock = cinode->oplock; 4139 4140 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4141 4142 if (purge_cache) { 4143 *purge_cache = false; 4144 if (old_oplock == CIFS_CACHE_READ_FLG) { 4145 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4146 (epoch - cinode->epoch > 0)) 4147 *purge_cache = true; 4148 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4149 (epoch - cinode->epoch > 1)) 4150 *purge_cache = true; 4151 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4152 (epoch - cinode->epoch > 1)) 4153 *purge_cache = true; 4154 else if (cinode->oplock == 0 && 4155 (epoch - cinode->epoch > 0)) 4156 *purge_cache = true; 4157 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4158 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4159 (epoch - cinode->epoch > 0)) 4160 *purge_cache = true; 4161 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4162 (epoch - cinode->epoch > 1)) 4163 *purge_cache = true; 4164 } 4165 cinode->epoch = epoch; 4166 } 4167 } 4168 4169 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4170 static bool 4171 smb2_is_read_op(__u32 oplock) 4172 { 4173 return oplock == SMB2_OPLOCK_LEVEL_II; 4174 } 4175 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4176 4177 static bool 4178 smb21_is_read_op(__u32 oplock) 4179 { 4180 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4181 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4182 } 4183 4184 static __le32 4185 map_oplock_to_lease(u8 oplock) 4186 { 4187 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4188 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4189 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4190 return SMB2_LEASE_READ_CACHING_LE; 4191 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4192 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4193 SMB2_LEASE_WRITE_CACHING_LE; 4194 return 0; 4195 } 4196 4197 static char * 4198 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 4199 { 4200 struct create_lease *buf; 4201 4202 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4203 if (!buf) 4204 return NULL; 4205 4206 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4207 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4208 4209 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4210 (struct create_lease, lcontext)); 4211 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4212 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4213 (struct create_lease, Name)); 4214 buf->ccontext.NameLength = cpu_to_le16(4); 4215 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4216 buf->Name[0] = 'R'; 4217 buf->Name[1] = 'q'; 4218 buf->Name[2] = 'L'; 4219 buf->Name[3] = 's'; 4220 return (char *)buf; 4221 } 4222 4223 static char * 4224 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4225 { 4226 struct create_lease_v2 *buf; 4227 4228 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4229 if (!buf) 4230 return NULL; 4231 4232 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4233 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4234 4235 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4236 (struct create_lease_v2, lcontext)); 4237 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4238 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4239 (struct create_lease_v2, Name)); 4240 buf->ccontext.NameLength = cpu_to_le16(4); 4241 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4242 buf->Name[0] = 'R'; 4243 buf->Name[1] = 'q'; 4244 buf->Name[2] = 'L'; 4245 buf->Name[3] = 's'; 4246 return (char *)buf; 4247 } 4248 4249 static __u8 4250 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4251 { 4252 struct create_lease *lc = (struct create_lease *)buf; 4253 4254 *epoch = 0; /* not used */ 4255 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4256 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4257 return le32_to_cpu(lc->lcontext.LeaseState); 4258 } 4259 4260 static __u8 4261 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4262 { 4263 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4264 4265 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4266 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4267 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4268 if (lease_key) 4269 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4270 return le32_to_cpu(lc->lcontext.LeaseState); 4271 } 4272 4273 static unsigned int 4274 smb2_wp_retry_size(struct inode *inode) 4275 { 4276 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4277 SMB2_MAX_BUFFER_SIZE); 4278 } 4279 4280 static bool 4281 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4282 { 4283 return !cfile->invalidHandle; 4284 } 4285 4286 static void 4287 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4288 struct smb_rqst *old_rq, __le16 cipher_type) 4289 { 4290 struct smb2_hdr *shdr = 4291 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4292 4293 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4294 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4295 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4296 tr_hdr->Flags = cpu_to_le16(0x01); 4297 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4298 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4299 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4300 else 4301 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4302 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4303 } 4304 4305 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4306 int num_rqst, const u8 *sig, u8 **iv, 4307 struct aead_request **req, struct sg_table *sgt, 4308 unsigned int *num_sgs, size_t *sensitive_size) 4309 { 4310 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4311 unsigned int iv_size = crypto_aead_ivsize(tfm); 4312 unsigned int len; 4313 u8 *p; 4314 4315 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4316 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4317 return ERR_PTR(*num_sgs); 4318 4319 len = iv_size; 4320 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4321 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4322 len += req_size; 4323 len = ALIGN(len, __alignof__(struct scatterlist)); 4324 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4325 *sensitive_size = len; 4326 4327 p = kvzalloc(len, GFP_NOFS); 4328 if (!p) 4329 return ERR_PTR(-ENOMEM); 4330 4331 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4332 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4333 crypto_tfm_ctx_alignment()); 4334 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4335 __alignof__(struct scatterlist)); 4336 return p; 4337 } 4338 4339 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4340 int num_rqst, const u8 *sig, u8 **iv, 4341 struct aead_request **req, struct scatterlist **sgl, 4342 size_t *sensitive_size) 4343 { 4344 struct sg_table sgtable = {}; 4345 unsigned int skip, num_sgs, i, j; 4346 ssize_t rc; 4347 void *p; 4348 4349 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4350 &num_sgs, sensitive_size); 4351 if (IS_ERR(p)) 4352 return ERR_CAST(p); 4353 4354 sg_init_marker(sgtable.sgl, num_sgs); 4355 4356 /* 4357 * The first rqst has a transform header where the 4358 * first 20 bytes are not part of the encrypted blob. 4359 */ 4360 skip = 20; 4361 4362 for (i = 0; i < num_rqst; i++) { 4363 struct iov_iter *iter = &rqst[i].rq_iter; 4364 size_t count = iov_iter_count(iter); 4365 4366 for (j = 0; j < rqst[i].rq_nvec; j++) { 4367 cifs_sg_set_buf(&sgtable, 4368 rqst[i].rq_iov[j].iov_base + skip, 4369 rqst[i].rq_iov[j].iov_len - skip); 4370 4371 /* See the above comment on the 'skip' assignment */ 4372 skip = 0; 4373 } 4374 sgtable.orig_nents = sgtable.nents; 4375 4376 rc = extract_iter_to_sg(iter, count, &sgtable, 4377 num_sgs - sgtable.nents, 0); 4378 iov_iter_revert(iter, rc); 4379 sgtable.orig_nents = sgtable.nents; 4380 } 4381 4382 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4383 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4384 *sgl = sgtable.sgl; 4385 return p; 4386 } 4387 4388 static int 4389 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4390 { 4391 struct TCP_Server_Info *pserver; 4392 struct cifs_ses *ses; 4393 u8 *ses_enc_key; 4394 4395 /* If server is a channel, select the primary channel */ 4396 pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server; 4397 4398 spin_lock(&cifs_tcp_ses_lock); 4399 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4400 if (ses->Suid == ses_id) { 4401 spin_lock(&ses->ses_lock); 4402 ses_enc_key = enc ? ses->smb3encryptionkey : 4403 ses->smb3decryptionkey; 4404 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4405 spin_unlock(&ses->ses_lock); 4406 spin_unlock(&cifs_tcp_ses_lock); 4407 return 0; 4408 } 4409 } 4410 spin_unlock(&cifs_tcp_ses_lock); 4411 4412 return -EAGAIN; 4413 } 4414 /* 4415 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4416 * iov[0] - transform header (associate data), 4417 * iov[1-N] - SMB2 header and pages - data to encrypt. 4418 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4419 * untouched. 4420 */ 4421 static int 4422 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4423 struct smb_rqst *rqst, int enc) 4424 { 4425 struct smb2_transform_hdr *tr_hdr = 4426 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4427 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4428 int rc = 0; 4429 struct scatterlist *sg; 4430 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4431 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4432 struct aead_request *req; 4433 u8 *iv; 4434 DECLARE_CRYPTO_WAIT(wait); 4435 struct crypto_aead *tfm; 4436 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4437 void *creq; 4438 size_t sensitive_size; 4439 4440 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4441 if (rc) { 4442 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__, 4443 enc ? "en" : "de"); 4444 return rc; 4445 } 4446 4447 rc = smb3_crypto_aead_allocate(server); 4448 if (rc) { 4449 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4450 return rc; 4451 } 4452 4453 tfm = enc ? server->secmech.enc : server->secmech.dec; 4454 4455 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4456 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4457 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4458 else 4459 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4460 4461 if (rc) { 4462 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4463 return rc; 4464 } 4465 4466 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4467 if (rc) { 4468 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4469 return rc; 4470 } 4471 4472 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4473 &sensitive_size); 4474 if (IS_ERR(creq)) 4475 return PTR_ERR(creq); 4476 4477 if (!enc) { 4478 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4479 crypt_len += SMB2_SIGNATURE_SIZE; 4480 } 4481 4482 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4483 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4484 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4485 else { 4486 iv[0] = 3; 4487 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4488 } 4489 4490 aead_request_set_tfm(req, tfm); 4491 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4492 aead_request_set_ad(req, assoc_data_len); 4493 4494 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4495 crypto_req_done, &wait); 4496 4497 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4498 : crypto_aead_decrypt(req), &wait); 4499 4500 if (!rc && enc) 4501 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4502 4503 kvfree_sensitive(creq, sensitive_size); 4504 return rc; 4505 } 4506 4507 /* 4508 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4509 */ 4510 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4511 { 4512 struct folio *folio; 4513 4514 XA_STATE(xas, buffer, 0); 4515 4516 rcu_read_lock(); 4517 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4518 folio_put(folio); 4519 } 4520 rcu_read_unlock(); 4521 xa_destroy(buffer); 4522 } 4523 4524 void 4525 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4526 { 4527 int i; 4528 4529 for (i = 0; i < num_rqst; i++) 4530 if (!xa_empty(&rqst[i].rq_buffer)) 4531 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4532 } 4533 4534 /* 4535 * This function will initialize new_rq and encrypt the content. 4536 * The first entry, new_rq[0], only contains a single iov which contains 4537 * a smb2_transform_hdr and is pre-allocated by the caller. 4538 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4539 * 4540 * The end result is an array of smb_rqst structures where the first structure 4541 * only contains a single iov for the transform header which we then can pass 4542 * to crypt_message(). 4543 * 4544 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4545 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4546 */ 4547 static int 4548 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4549 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4550 { 4551 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4552 struct page *page; 4553 unsigned int orig_len = 0; 4554 int i, j; 4555 int rc = -ENOMEM; 4556 4557 for (i = 1; i < num_rqst; i++) { 4558 struct smb_rqst *old = &old_rq[i - 1]; 4559 struct smb_rqst *new = &new_rq[i]; 4560 struct xarray *buffer = &new->rq_buffer; 4561 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4562 4563 orig_len += smb_rqst_len(server, old); 4564 new->rq_iov = old->rq_iov; 4565 new->rq_nvec = old->rq_nvec; 4566 4567 xa_init(buffer); 4568 4569 if (size > 0) { 4570 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4571 4572 for (j = 0; j < npages; j++) { 4573 void *o; 4574 4575 rc = -ENOMEM; 4576 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4577 if (!page) 4578 goto err_free; 4579 page->index = j; 4580 o = xa_store(buffer, j, page, GFP_KERNEL); 4581 if (xa_is_err(o)) { 4582 rc = xa_err(o); 4583 put_page(page); 4584 goto err_free; 4585 } 4586 4587 xa_set_mark(buffer, j, XA_MARK_0); 4588 4589 seg = min_t(size_t, size - copied, PAGE_SIZE); 4590 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4591 rc = -EFAULT; 4592 goto err_free; 4593 } 4594 copied += seg; 4595 } 4596 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4597 buffer, 0, size); 4598 new->rq_iter_size = size; 4599 } 4600 } 4601 4602 /* fill the 1st iov with a transform header */ 4603 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4604 4605 rc = crypt_message(server, num_rqst, new_rq, 1); 4606 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4607 if (rc) 4608 goto err_free; 4609 4610 return rc; 4611 4612 err_free: 4613 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4614 return rc; 4615 } 4616 4617 static int 4618 smb3_is_transform_hdr(void *buf) 4619 { 4620 struct smb2_transform_hdr *trhdr = buf; 4621 4622 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4623 } 4624 4625 static int 4626 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4627 unsigned int buf_data_size, struct iov_iter *iter, 4628 bool is_offloaded) 4629 { 4630 struct kvec iov[2]; 4631 struct smb_rqst rqst = {NULL}; 4632 size_t iter_size = 0; 4633 int rc; 4634 4635 iov[0].iov_base = buf; 4636 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4637 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4638 iov[1].iov_len = buf_data_size; 4639 4640 rqst.rq_iov = iov; 4641 rqst.rq_nvec = 2; 4642 if (iter) { 4643 rqst.rq_iter = *iter; 4644 rqst.rq_iter_size = iov_iter_count(iter); 4645 iter_size = iov_iter_count(iter); 4646 } 4647 4648 rc = crypt_message(server, 1, &rqst, 0); 4649 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4650 4651 if (rc) 4652 return rc; 4653 4654 memmove(buf, iov[1].iov_base, buf_data_size); 4655 4656 if (!is_offloaded) 4657 server->total_read = buf_data_size + iter_size; 4658 4659 return rc; 4660 } 4661 4662 static int 4663 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4664 unsigned int skip, struct iov_iter *iter) 4665 { 4666 struct page *page; 4667 unsigned long index; 4668 4669 xa_for_each(pages, index, page) { 4670 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4671 4672 n = copy_page_to_iter(page, skip, len, iter); 4673 if (n != len) { 4674 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4675 return -EIO; 4676 } 4677 data_size -= n; 4678 skip = 0; 4679 } 4680 4681 return 0; 4682 } 4683 4684 static int 4685 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4686 char *buf, unsigned int buf_len, struct xarray *pages, 4687 unsigned int pages_len, bool is_offloaded) 4688 { 4689 unsigned int data_offset; 4690 unsigned int data_len; 4691 unsigned int cur_off; 4692 unsigned int cur_page_idx; 4693 unsigned int pad_len; 4694 struct cifs_readdata *rdata = mid->callback_data; 4695 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4696 int length; 4697 bool use_rdma_mr = false; 4698 4699 if (shdr->Command != SMB2_READ) { 4700 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4701 return -ENOTSUPP; 4702 } 4703 4704 if (server->ops->is_session_expired && 4705 server->ops->is_session_expired(buf)) { 4706 if (!is_offloaded) 4707 cifs_reconnect(server, true); 4708 return -1; 4709 } 4710 4711 if (server->ops->is_status_pending && 4712 server->ops->is_status_pending(buf, server)) 4713 return -1; 4714 4715 /* set up first two iov to get credits */ 4716 rdata->iov[0].iov_base = buf; 4717 rdata->iov[0].iov_len = 0; 4718 rdata->iov[1].iov_base = buf; 4719 rdata->iov[1].iov_len = 4720 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4721 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4722 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4723 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4724 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4725 4726 rdata->result = server->ops->map_error(buf, true); 4727 if (rdata->result != 0) { 4728 cifs_dbg(FYI, "%s: server returned error %d\n", 4729 __func__, rdata->result); 4730 /* normal error on read response */ 4731 if (is_offloaded) 4732 mid->mid_state = MID_RESPONSE_RECEIVED; 4733 else 4734 dequeue_mid(mid, false); 4735 return 0; 4736 } 4737 4738 data_offset = server->ops->read_data_offset(buf); 4739 #ifdef CONFIG_CIFS_SMB_DIRECT 4740 use_rdma_mr = rdata->mr; 4741 #endif 4742 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4743 4744 if (data_offset < server->vals->read_rsp_size) { 4745 /* 4746 * win2k8 sometimes sends an offset of 0 when the read 4747 * is beyond the EOF. Treat it as if the data starts just after 4748 * the header. 4749 */ 4750 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4751 __func__, data_offset); 4752 data_offset = server->vals->read_rsp_size; 4753 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4754 /* data_offset is beyond the end of smallbuf */ 4755 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4756 __func__, data_offset); 4757 rdata->result = -EIO; 4758 if (is_offloaded) 4759 mid->mid_state = MID_RESPONSE_MALFORMED; 4760 else 4761 dequeue_mid(mid, rdata->result); 4762 return 0; 4763 } 4764 4765 pad_len = data_offset - server->vals->read_rsp_size; 4766 4767 if (buf_len <= data_offset) { 4768 /* read response payload is in pages */ 4769 cur_page_idx = pad_len / PAGE_SIZE; 4770 cur_off = pad_len % PAGE_SIZE; 4771 4772 if (cur_page_idx != 0) { 4773 /* data offset is beyond the 1st page of response */ 4774 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4775 __func__, data_offset); 4776 rdata->result = -EIO; 4777 if (is_offloaded) 4778 mid->mid_state = MID_RESPONSE_MALFORMED; 4779 else 4780 dequeue_mid(mid, rdata->result); 4781 return 0; 4782 } 4783 4784 if (data_len > pages_len - pad_len) { 4785 /* data_len is corrupt -- discard frame */ 4786 rdata->result = -EIO; 4787 if (is_offloaded) 4788 mid->mid_state = MID_RESPONSE_MALFORMED; 4789 else 4790 dequeue_mid(mid, rdata->result); 4791 return 0; 4792 } 4793 4794 /* Copy the data to the output I/O iterator. */ 4795 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4796 cur_off, &rdata->iter); 4797 if (rdata->result != 0) { 4798 if (is_offloaded) 4799 mid->mid_state = MID_RESPONSE_MALFORMED; 4800 else 4801 dequeue_mid(mid, rdata->result); 4802 return 0; 4803 } 4804 rdata->got_bytes = pages_len; 4805 4806 } else if (buf_len >= data_offset + data_len) { 4807 /* read response payload is in buf */ 4808 WARN_ONCE(pages && !xa_empty(pages), 4809 "read data can be either in buf or in pages"); 4810 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4811 if (length < 0) 4812 return length; 4813 rdata->got_bytes = data_len; 4814 } else { 4815 /* read response payload cannot be in both buf and pages */ 4816 WARN_ONCE(1, "buf can not contain only a part of read data"); 4817 rdata->result = -EIO; 4818 if (is_offloaded) 4819 mid->mid_state = MID_RESPONSE_MALFORMED; 4820 else 4821 dequeue_mid(mid, rdata->result); 4822 return 0; 4823 } 4824 4825 if (is_offloaded) 4826 mid->mid_state = MID_RESPONSE_RECEIVED; 4827 else 4828 dequeue_mid(mid, false); 4829 return 0; 4830 } 4831 4832 struct smb2_decrypt_work { 4833 struct work_struct decrypt; 4834 struct TCP_Server_Info *server; 4835 struct xarray buffer; 4836 char *buf; 4837 unsigned int len; 4838 }; 4839 4840 4841 static void smb2_decrypt_offload(struct work_struct *work) 4842 { 4843 struct smb2_decrypt_work *dw = container_of(work, 4844 struct smb2_decrypt_work, decrypt); 4845 int rc; 4846 struct mid_q_entry *mid; 4847 struct iov_iter iter; 4848 4849 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4850 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4851 &iter, true); 4852 if (rc) { 4853 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4854 goto free_pages; 4855 } 4856 4857 dw->server->lstrp = jiffies; 4858 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4859 if (mid == NULL) 4860 cifs_dbg(FYI, "mid not found\n"); 4861 else { 4862 mid->decrypted = true; 4863 rc = handle_read_data(dw->server, mid, dw->buf, 4864 dw->server->vals->read_rsp_size, 4865 &dw->buffer, dw->len, 4866 true); 4867 if (rc >= 0) { 4868 #ifdef CONFIG_CIFS_STATS2 4869 mid->when_received = jiffies; 4870 #endif 4871 if (dw->server->ops->is_network_name_deleted) 4872 dw->server->ops->is_network_name_deleted(dw->buf, 4873 dw->server); 4874 4875 mid->callback(mid); 4876 } else { 4877 spin_lock(&dw->server->srv_lock); 4878 if (dw->server->tcpStatus == CifsNeedReconnect) { 4879 spin_lock(&dw->server->mid_lock); 4880 mid->mid_state = MID_RETRY_NEEDED; 4881 spin_unlock(&dw->server->mid_lock); 4882 spin_unlock(&dw->server->srv_lock); 4883 mid->callback(mid); 4884 } else { 4885 spin_lock(&dw->server->mid_lock); 4886 mid->mid_state = MID_REQUEST_SUBMITTED; 4887 mid->mid_flags &= ~(MID_DELETED); 4888 list_add_tail(&mid->qhead, 4889 &dw->server->pending_mid_q); 4890 spin_unlock(&dw->server->mid_lock); 4891 spin_unlock(&dw->server->srv_lock); 4892 } 4893 } 4894 release_mid(mid); 4895 } 4896 4897 free_pages: 4898 cifs_clear_xarray_buffer(&dw->buffer); 4899 cifs_small_buf_release(dw->buf); 4900 kfree(dw); 4901 } 4902 4903 4904 static int 4905 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4906 int *num_mids) 4907 { 4908 struct page *page; 4909 char *buf = server->smallbuf; 4910 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4911 struct iov_iter iter; 4912 unsigned int len, npages; 4913 unsigned int buflen = server->pdu_size; 4914 int rc; 4915 int i = 0; 4916 struct smb2_decrypt_work *dw; 4917 4918 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4919 if (!dw) 4920 return -ENOMEM; 4921 xa_init(&dw->buffer); 4922 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4923 dw->server = server; 4924 4925 *num_mids = 1; 4926 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4927 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4928 4929 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4930 if (rc < 0) 4931 goto free_dw; 4932 server->total_read += rc; 4933 4934 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4935 server->vals->read_rsp_size; 4936 dw->len = len; 4937 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4938 4939 rc = -ENOMEM; 4940 for (; i < npages; i++) { 4941 void *old; 4942 4943 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4944 if (!page) 4945 goto discard_data; 4946 page->index = i; 4947 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4948 if (xa_is_err(old)) { 4949 rc = xa_err(old); 4950 put_page(page); 4951 goto discard_data; 4952 } 4953 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4954 } 4955 4956 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4957 4958 /* Read the data into the buffer and clear excess bufferage. */ 4959 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4960 if (rc < 0) 4961 goto discard_data; 4962 4963 server->total_read += rc; 4964 if (rc < npages * PAGE_SIZE) 4965 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4966 iov_iter_revert(&iter, npages * PAGE_SIZE); 4967 iov_iter_truncate(&iter, dw->len); 4968 4969 rc = cifs_discard_remaining_data(server); 4970 if (rc) 4971 goto free_pages; 4972 4973 /* 4974 * For large reads, offload to different thread for better performance, 4975 * use more cores decrypting which can be expensive 4976 */ 4977 4978 if ((server->min_offload) && (server->in_flight > 1) && 4979 (server->pdu_size >= server->min_offload)) { 4980 dw->buf = server->smallbuf; 4981 server->smallbuf = (char *)cifs_small_buf_get(); 4982 4983 queue_work(decrypt_wq, &dw->decrypt); 4984 *num_mids = 0; /* worker thread takes care of finding mid */ 4985 return -1; 4986 } 4987 4988 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4989 &iter, false); 4990 if (rc) 4991 goto free_pages; 4992 4993 *mid = smb2_find_mid(server, buf); 4994 if (*mid == NULL) { 4995 cifs_dbg(FYI, "mid not found\n"); 4996 } else { 4997 cifs_dbg(FYI, "mid found\n"); 4998 (*mid)->decrypted = true; 4999 rc = handle_read_data(server, *mid, buf, 5000 server->vals->read_rsp_size, 5001 &dw->buffer, dw->len, false); 5002 if (rc >= 0) { 5003 if (server->ops->is_network_name_deleted) { 5004 server->ops->is_network_name_deleted(buf, 5005 server); 5006 } 5007 } 5008 } 5009 5010 free_pages: 5011 cifs_clear_xarray_buffer(&dw->buffer); 5012 free_dw: 5013 kfree(dw); 5014 return rc; 5015 discard_data: 5016 cifs_discard_remaining_data(server); 5017 goto free_pages; 5018 } 5019 5020 static int 5021 receive_encrypted_standard(struct TCP_Server_Info *server, 5022 struct mid_q_entry **mids, char **bufs, 5023 int *num_mids) 5024 { 5025 int ret, length; 5026 char *buf = server->smallbuf; 5027 struct smb2_hdr *shdr; 5028 unsigned int pdu_length = server->pdu_size; 5029 unsigned int buf_size; 5030 struct mid_q_entry *mid_entry; 5031 int next_is_large; 5032 char *next_buffer = NULL; 5033 5034 *num_mids = 0; 5035 5036 /* switch to large buffer if too big for a small one */ 5037 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 5038 server->large_buf = true; 5039 memcpy(server->bigbuf, buf, server->total_read); 5040 buf = server->bigbuf; 5041 } 5042 5043 /* now read the rest */ 5044 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 5045 pdu_length - HEADER_SIZE(server) + 1); 5046 if (length < 0) 5047 return length; 5048 server->total_read += length; 5049 5050 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 5051 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 5052 if (length) 5053 return length; 5054 5055 next_is_large = server->large_buf; 5056 one_more: 5057 shdr = (struct smb2_hdr *)buf; 5058 if (shdr->NextCommand) { 5059 if (next_is_large) 5060 next_buffer = (char *)cifs_buf_get(); 5061 else 5062 next_buffer = (char *)cifs_small_buf_get(); 5063 memcpy(next_buffer, 5064 buf + le32_to_cpu(shdr->NextCommand), 5065 pdu_length - le32_to_cpu(shdr->NextCommand)); 5066 } 5067 5068 mid_entry = smb2_find_mid(server, buf); 5069 if (mid_entry == NULL) 5070 cifs_dbg(FYI, "mid not found\n"); 5071 else { 5072 cifs_dbg(FYI, "mid found\n"); 5073 mid_entry->decrypted = true; 5074 mid_entry->resp_buf_size = server->pdu_size; 5075 } 5076 5077 if (*num_mids >= MAX_COMPOUND) { 5078 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5079 return -1; 5080 } 5081 bufs[*num_mids] = buf; 5082 mids[(*num_mids)++] = mid_entry; 5083 5084 if (mid_entry && mid_entry->handle) 5085 ret = mid_entry->handle(server, mid_entry); 5086 else 5087 ret = cifs_handle_standard(server, mid_entry); 5088 5089 if (ret == 0 && shdr->NextCommand) { 5090 pdu_length -= le32_to_cpu(shdr->NextCommand); 5091 server->large_buf = next_is_large; 5092 if (next_is_large) 5093 server->bigbuf = buf = next_buffer; 5094 else 5095 server->smallbuf = buf = next_buffer; 5096 goto one_more; 5097 } else if (ret != 0) { 5098 /* 5099 * ret != 0 here means that we didn't get to handle_mid() thus 5100 * server->smallbuf and server->bigbuf are still valid. We need 5101 * to free next_buffer because it is not going to be used 5102 * anywhere. 5103 */ 5104 if (next_is_large) 5105 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5106 else 5107 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5108 } 5109 5110 return ret; 5111 } 5112 5113 static int 5114 smb3_receive_transform(struct TCP_Server_Info *server, 5115 struct mid_q_entry **mids, char **bufs, int *num_mids) 5116 { 5117 char *buf = server->smallbuf; 5118 unsigned int pdu_length = server->pdu_size; 5119 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5120 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5121 5122 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5123 sizeof(struct smb2_hdr)) { 5124 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5125 pdu_length); 5126 cifs_reconnect(server, true); 5127 return -ECONNABORTED; 5128 } 5129 5130 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5131 cifs_server_dbg(VFS, "Transform message is broken\n"); 5132 cifs_reconnect(server, true); 5133 return -ECONNABORTED; 5134 } 5135 5136 /* TODO: add support for compounds containing READ. */ 5137 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5138 return receive_encrypted_read(server, &mids[0], num_mids); 5139 } 5140 5141 return receive_encrypted_standard(server, mids, bufs, num_mids); 5142 } 5143 5144 int 5145 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5146 { 5147 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5148 5149 return handle_read_data(server, mid, buf, server->pdu_size, 5150 NULL, 0, false); 5151 } 5152 5153 static int 5154 smb2_next_header(char *buf) 5155 { 5156 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5157 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5158 5159 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) 5160 return sizeof(struct smb2_transform_hdr) + 5161 le32_to_cpu(t_hdr->OriginalMessageSize); 5162 5163 return le32_to_cpu(hdr->NextCommand); 5164 } 5165 5166 static int 5167 smb2_make_node(unsigned int xid, struct inode *inode, 5168 struct dentry *dentry, struct cifs_tcon *tcon, 5169 const char *full_path, umode_t mode, dev_t dev) 5170 { 5171 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5172 int rc = -EPERM; 5173 struct cifs_open_info_data buf = {}; 5174 struct cifs_io_parms io_parms = {0}; 5175 __u32 oplock = 0; 5176 struct cifs_fid fid; 5177 struct cifs_open_parms oparms; 5178 unsigned int bytes_written; 5179 struct win_dev *pdev; 5180 struct kvec iov[2]; 5181 5182 /* 5183 * Check if mounted with mount parm 'sfu' mount parm. 5184 * SFU emulation should work with all servers, but only 5185 * supports block and char device (no socket & fifo), 5186 * and was used by default in earlier versions of Windows 5187 */ 5188 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) 5189 return rc; 5190 5191 /* 5192 * TODO: Add ability to create instead via reparse point. Windows (e.g. 5193 * their current NFS server) uses this approach to expose special files 5194 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions 5195 */ 5196 5197 if (!S_ISCHR(mode) && !S_ISBLK(mode)) 5198 return rc; 5199 5200 cifs_dbg(FYI, "sfu compat create special file\n"); 5201 5202 oparms = (struct cifs_open_parms) { 5203 .tcon = tcon, 5204 .cifs_sb = cifs_sb, 5205 .desired_access = GENERIC_WRITE, 5206 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 5207 CREATE_OPTION_SPECIAL), 5208 .disposition = FILE_CREATE, 5209 .path = full_path, 5210 .fid = &fid, 5211 }; 5212 5213 if (tcon->ses->server->oplocks) 5214 oplock = REQ_OPLOCK; 5215 else 5216 oplock = 0; 5217 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf); 5218 if (rc) 5219 return rc; 5220 5221 /* 5222 * BB Do not bother to decode buf since no local inode yet to put 5223 * timestamps in, but we can reuse it safely. 5224 */ 5225 5226 pdev = (struct win_dev *)&buf.fi; 5227 io_parms.pid = current->tgid; 5228 io_parms.tcon = tcon; 5229 io_parms.offset = 0; 5230 io_parms.length = sizeof(struct win_dev); 5231 iov[1].iov_base = &buf.fi; 5232 iov[1].iov_len = sizeof(struct win_dev); 5233 if (S_ISCHR(mode)) { 5234 memcpy(pdev->type, "IntxCHR", 8); 5235 pdev->major = cpu_to_le64(MAJOR(dev)); 5236 pdev->minor = cpu_to_le64(MINOR(dev)); 5237 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, 5238 &bytes_written, iov, 1); 5239 } else if (S_ISBLK(mode)) { 5240 memcpy(pdev->type, "IntxBLK", 8); 5241 pdev->major = cpu_to_le64(MAJOR(dev)); 5242 pdev->minor = cpu_to_le64(MINOR(dev)); 5243 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, 5244 &bytes_written, iov, 1); 5245 } 5246 tcon->ses->server->ops->close(xid, tcon, &fid); 5247 d_drop(dentry); 5248 5249 /* FIXME: add code here to set EAs */ 5250 5251 cifs_free_open_info(&buf); 5252 return rc; 5253 } 5254 5255 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5256 struct smb_version_operations smb20_operations = { 5257 .compare_fids = smb2_compare_fids, 5258 .setup_request = smb2_setup_request, 5259 .setup_async_request = smb2_setup_async_request, 5260 .check_receive = smb2_check_receive, 5261 .add_credits = smb2_add_credits, 5262 .set_credits = smb2_set_credits, 5263 .get_credits_field = smb2_get_credits_field, 5264 .get_credits = smb2_get_credits, 5265 .wait_mtu_credits = cifs_wait_mtu_credits, 5266 .get_next_mid = smb2_get_next_mid, 5267 .revert_current_mid = smb2_revert_current_mid, 5268 .read_data_offset = smb2_read_data_offset, 5269 .read_data_length = smb2_read_data_length, 5270 .map_error = map_smb2_to_linux_error, 5271 .find_mid = smb2_find_mid, 5272 .check_message = smb2_check_message, 5273 .dump_detail = smb2_dump_detail, 5274 .clear_stats = smb2_clear_stats, 5275 .print_stats = smb2_print_stats, 5276 .is_oplock_break = smb2_is_valid_oplock_break, 5277 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5278 .downgrade_oplock = smb2_downgrade_oplock, 5279 .need_neg = smb2_need_neg, 5280 .negotiate = smb2_negotiate, 5281 .negotiate_wsize = smb2_negotiate_wsize, 5282 .negotiate_rsize = smb2_negotiate_rsize, 5283 .sess_setup = SMB2_sess_setup, 5284 .logoff = SMB2_logoff, 5285 .tree_connect = SMB2_tcon, 5286 .tree_disconnect = SMB2_tdis, 5287 .qfs_tcon = smb2_qfs_tcon, 5288 .is_path_accessible = smb2_is_path_accessible, 5289 .can_echo = smb2_can_echo, 5290 .echo = SMB2_echo, 5291 .query_path_info = smb2_query_path_info, 5292 .get_srv_inum = smb2_get_srv_inum, 5293 .query_file_info = smb2_query_file_info, 5294 .set_path_size = smb2_set_path_size, 5295 .set_file_size = smb2_set_file_size, 5296 .set_file_info = smb2_set_file_info, 5297 .set_compression = smb2_set_compression, 5298 .mkdir = smb2_mkdir, 5299 .mkdir_setinfo = smb2_mkdir_setinfo, 5300 .rmdir = smb2_rmdir, 5301 .unlink = smb2_unlink, 5302 .rename = smb2_rename_path, 5303 .create_hardlink = smb2_create_hardlink, 5304 .query_symlink = smb2_query_symlink, 5305 .query_mf_symlink = smb3_query_mf_symlink, 5306 .create_mf_symlink = smb3_create_mf_symlink, 5307 .open = smb2_open_file, 5308 .set_fid = smb2_set_fid, 5309 .close = smb2_close_file, 5310 .flush = smb2_flush_file, 5311 .async_readv = smb2_async_readv, 5312 .async_writev = smb2_async_writev, 5313 .sync_read = smb2_sync_read, 5314 .sync_write = smb2_sync_write, 5315 .query_dir_first = smb2_query_dir_first, 5316 .query_dir_next = smb2_query_dir_next, 5317 .close_dir = smb2_close_dir, 5318 .calc_smb_size = smb2_calc_size, 5319 .is_status_pending = smb2_is_status_pending, 5320 .is_session_expired = smb2_is_session_expired, 5321 .oplock_response = smb2_oplock_response, 5322 .queryfs = smb2_queryfs, 5323 .mand_lock = smb2_mand_lock, 5324 .mand_unlock_range = smb2_unlock_range, 5325 .push_mand_locks = smb2_push_mandatory_locks, 5326 .get_lease_key = smb2_get_lease_key, 5327 .set_lease_key = smb2_set_lease_key, 5328 .new_lease_key = smb2_new_lease_key, 5329 .calc_signature = smb2_calc_signature, 5330 .is_read_op = smb2_is_read_op, 5331 .set_oplock_level = smb2_set_oplock_level, 5332 .create_lease_buf = smb2_create_lease_buf, 5333 .parse_lease_buf = smb2_parse_lease_buf, 5334 .copychunk_range = smb2_copychunk_range, 5335 .wp_retry_size = smb2_wp_retry_size, 5336 .dir_needs_close = smb2_dir_needs_close, 5337 .get_dfs_refer = smb2_get_dfs_refer, 5338 .select_sectype = smb2_select_sectype, 5339 #ifdef CONFIG_CIFS_XATTR 5340 .query_all_EAs = smb2_query_eas, 5341 .set_EA = smb2_set_ea, 5342 #endif /* CIFS_XATTR */ 5343 .get_acl = get_smb2_acl, 5344 .get_acl_by_fid = get_smb2_acl_by_fid, 5345 .set_acl = set_smb2_acl, 5346 .next_header = smb2_next_header, 5347 .ioctl_query_info = smb2_ioctl_query_info, 5348 .make_node = smb2_make_node, 5349 .fiemap = smb3_fiemap, 5350 .llseek = smb3_llseek, 5351 .is_status_io_timeout = smb2_is_status_io_timeout, 5352 .is_network_name_deleted = smb2_is_network_name_deleted, 5353 }; 5354 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5355 5356 struct smb_version_operations smb21_operations = { 5357 .compare_fids = smb2_compare_fids, 5358 .setup_request = smb2_setup_request, 5359 .setup_async_request = smb2_setup_async_request, 5360 .check_receive = smb2_check_receive, 5361 .add_credits = smb2_add_credits, 5362 .set_credits = smb2_set_credits, 5363 .get_credits_field = smb2_get_credits_field, 5364 .get_credits = smb2_get_credits, 5365 .wait_mtu_credits = smb2_wait_mtu_credits, 5366 .adjust_credits = smb2_adjust_credits, 5367 .get_next_mid = smb2_get_next_mid, 5368 .revert_current_mid = smb2_revert_current_mid, 5369 .read_data_offset = smb2_read_data_offset, 5370 .read_data_length = smb2_read_data_length, 5371 .map_error = map_smb2_to_linux_error, 5372 .find_mid = smb2_find_mid, 5373 .check_message = smb2_check_message, 5374 .dump_detail = smb2_dump_detail, 5375 .clear_stats = smb2_clear_stats, 5376 .print_stats = smb2_print_stats, 5377 .is_oplock_break = smb2_is_valid_oplock_break, 5378 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5379 .downgrade_oplock = smb2_downgrade_oplock, 5380 .need_neg = smb2_need_neg, 5381 .negotiate = smb2_negotiate, 5382 .negotiate_wsize = smb2_negotiate_wsize, 5383 .negotiate_rsize = smb2_negotiate_rsize, 5384 .sess_setup = SMB2_sess_setup, 5385 .logoff = SMB2_logoff, 5386 .tree_connect = SMB2_tcon, 5387 .tree_disconnect = SMB2_tdis, 5388 .qfs_tcon = smb2_qfs_tcon, 5389 .is_path_accessible = smb2_is_path_accessible, 5390 .can_echo = smb2_can_echo, 5391 .echo = SMB2_echo, 5392 .query_path_info = smb2_query_path_info, 5393 .get_srv_inum = smb2_get_srv_inum, 5394 .query_file_info = smb2_query_file_info, 5395 .set_path_size = smb2_set_path_size, 5396 .set_file_size = smb2_set_file_size, 5397 .set_file_info = smb2_set_file_info, 5398 .set_compression = smb2_set_compression, 5399 .mkdir = smb2_mkdir, 5400 .mkdir_setinfo = smb2_mkdir_setinfo, 5401 .rmdir = smb2_rmdir, 5402 .unlink = smb2_unlink, 5403 .rename = smb2_rename_path, 5404 .create_hardlink = smb2_create_hardlink, 5405 .query_symlink = smb2_query_symlink, 5406 .query_mf_symlink = smb3_query_mf_symlink, 5407 .create_mf_symlink = smb3_create_mf_symlink, 5408 .open = smb2_open_file, 5409 .set_fid = smb2_set_fid, 5410 .close = smb2_close_file, 5411 .flush = smb2_flush_file, 5412 .async_readv = smb2_async_readv, 5413 .async_writev = smb2_async_writev, 5414 .sync_read = smb2_sync_read, 5415 .sync_write = smb2_sync_write, 5416 .query_dir_first = smb2_query_dir_first, 5417 .query_dir_next = smb2_query_dir_next, 5418 .close_dir = smb2_close_dir, 5419 .calc_smb_size = smb2_calc_size, 5420 .is_status_pending = smb2_is_status_pending, 5421 .is_session_expired = smb2_is_session_expired, 5422 .oplock_response = smb2_oplock_response, 5423 .queryfs = smb2_queryfs, 5424 .mand_lock = smb2_mand_lock, 5425 .mand_unlock_range = smb2_unlock_range, 5426 .push_mand_locks = smb2_push_mandatory_locks, 5427 .get_lease_key = smb2_get_lease_key, 5428 .set_lease_key = smb2_set_lease_key, 5429 .new_lease_key = smb2_new_lease_key, 5430 .calc_signature = smb2_calc_signature, 5431 .is_read_op = smb21_is_read_op, 5432 .set_oplock_level = smb21_set_oplock_level, 5433 .create_lease_buf = smb2_create_lease_buf, 5434 .parse_lease_buf = smb2_parse_lease_buf, 5435 .copychunk_range = smb2_copychunk_range, 5436 .wp_retry_size = smb2_wp_retry_size, 5437 .dir_needs_close = smb2_dir_needs_close, 5438 .enum_snapshots = smb3_enum_snapshots, 5439 .notify = smb3_notify, 5440 .get_dfs_refer = smb2_get_dfs_refer, 5441 .select_sectype = smb2_select_sectype, 5442 #ifdef CONFIG_CIFS_XATTR 5443 .query_all_EAs = smb2_query_eas, 5444 .set_EA = smb2_set_ea, 5445 #endif /* CIFS_XATTR */ 5446 .get_acl = get_smb2_acl, 5447 .get_acl_by_fid = get_smb2_acl_by_fid, 5448 .set_acl = set_smb2_acl, 5449 .next_header = smb2_next_header, 5450 .ioctl_query_info = smb2_ioctl_query_info, 5451 .make_node = smb2_make_node, 5452 .fiemap = smb3_fiemap, 5453 .llseek = smb3_llseek, 5454 .is_status_io_timeout = smb2_is_status_io_timeout, 5455 .is_network_name_deleted = smb2_is_network_name_deleted, 5456 }; 5457 5458 struct smb_version_operations smb30_operations = { 5459 .compare_fids = smb2_compare_fids, 5460 .setup_request = smb2_setup_request, 5461 .setup_async_request = smb2_setup_async_request, 5462 .check_receive = smb2_check_receive, 5463 .add_credits = smb2_add_credits, 5464 .set_credits = smb2_set_credits, 5465 .get_credits_field = smb2_get_credits_field, 5466 .get_credits = smb2_get_credits, 5467 .wait_mtu_credits = smb2_wait_mtu_credits, 5468 .adjust_credits = smb2_adjust_credits, 5469 .get_next_mid = smb2_get_next_mid, 5470 .revert_current_mid = smb2_revert_current_mid, 5471 .read_data_offset = smb2_read_data_offset, 5472 .read_data_length = smb2_read_data_length, 5473 .map_error = map_smb2_to_linux_error, 5474 .find_mid = smb2_find_mid, 5475 .check_message = smb2_check_message, 5476 .dump_detail = smb2_dump_detail, 5477 .clear_stats = smb2_clear_stats, 5478 .print_stats = smb2_print_stats, 5479 .dump_share_caps = smb2_dump_share_caps, 5480 .is_oplock_break = smb2_is_valid_oplock_break, 5481 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5482 .downgrade_oplock = smb3_downgrade_oplock, 5483 .need_neg = smb2_need_neg, 5484 .negotiate = smb2_negotiate, 5485 .negotiate_wsize = smb3_negotiate_wsize, 5486 .negotiate_rsize = smb3_negotiate_rsize, 5487 .sess_setup = SMB2_sess_setup, 5488 .logoff = SMB2_logoff, 5489 .tree_connect = SMB2_tcon, 5490 .tree_disconnect = SMB2_tdis, 5491 .qfs_tcon = smb3_qfs_tcon, 5492 .is_path_accessible = smb2_is_path_accessible, 5493 .can_echo = smb2_can_echo, 5494 .echo = SMB2_echo, 5495 .query_path_info = smb2_query_path_info, 5496 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5497 .query_reparse_tag = smb2_query_reparse_tag, 5498 .get_srv_inum = smb2_get_srv_inum, 5499 .query_file_info = smb2_query_file_info, 5500 .set_path_size = smb2_set_path_size, 5501 .set_file_size = smb2_set_file_size, 5502 .set_file_info = smb2_set_file_info, 5503 .set_compression = smb2_set_compression, 5504 .mkdir = smb2_mkdir, 5505 .mkdir_setinfo = smb2_mkdir_setinfo, 5506 .rmdir = smb2_rmdir, 5507 .unlink = smb2_unlink, 5508 .rename = smb2_rename_path, 5509 .create_hardlink = smb2_create_hardlink, 5510 .query_symlink = smb2_query_symlink, 5511 .query_mf_symlink = smb3_query_mf_symlink, 5512 .create_mf_symlink = smb3_create_mf_symlink, 5513 .open = smb2_open_file, 5514 .set_fid = smb2_set_fid, 5515 .close = smb2_close_file, 5516 .close_getattr = smb2_close_getattr, 5517 .flush = smb2_flush_file, 5518 .async_readv = smb2_async_readv, 5519 .async_writev = smb2_async_writev, 5520 .sync_read = smb2_sync_read, 5521 .sync_write = smb2_sync_write, 5522 .query_dir_first = smb2_query_dir_first, 5523 .query_dir_next = smb2_query_dir_next, 5524 .close_dir = smb2_close_dir, 5525 .calc_smb_size = smb2_calc_size, 5526 .is_status_pending = smb2_is_status_pending, 5527 .is_session_expired = smb2_is_session_expired, 5528 .oplock_response = smb2_oplock_response, 5529 .queryfs = smb2_queryfs, 5530 .mand_lock = smb2_mand_lock, 5531 .mand_unlock_range = smb2_unlock_range, 5532 .push_mand_locks = smb2_push_mandatory_locks, 5533 .get_lease_key = smb2_get_lease_key, 5534 .set_lease_key = smb2_set_lease_key, 5535 .new_lease_key = smb2_new_lease_key, 5536 .generate_signingkey = generate_smb30signingkey, 5537 .calc_signature = smb3_calc_signature, 5538 .set_integrity = smb3_set_integrity, 5539 .is_read_op = smb21_is_read_op, 5540 .set_oplock_level = smb3_set_oplock_level, 5541 .create_lease_buf = smb3_create_lease_buf, 5542 .parse_lease_buf = smb3_parse_lease_buf, 5543 .copychunk_range = smb2_copychunk_range, 5544 .duplicate_extents = smb2_duplicate_extents, 5545 .validate_negotiate = smb3_validate_negotiate, 5546 .wp_retry_size = smb2_wp_retry_size, 5547 .dir_needs_close = smb2_dir_needs_close, 5548 .fallocate = smb3_fallocate, 5549 .enum_snapshots = smb3_enum_snapshots, 5550 .notify = smb3_notify, 5551 .init_transform_rq = smb3_init_transform_rq, 5552 .is_transform_hdr = smb3_is_transform_hdr, 5553 .receive_transform = smb3_receive_transform, 5554 .get_dfs_refer = smb2_get_dfs_refer, 5555 .select_sectype = smb2_select_sectype, 5556 #ifdef CONFIG_CIFS_XATTR 5557 .query_all_EAs = smb2_query_eas, 5558 .set_EA = smb2_set_ea, 5559 #endif /* CIFS_XATTR */ 5560 .get_acl = get_smb2_acl, 5561 .get_acl_by_fid = get_smb2_acl_by_fid, 5562 .set_acl = set_smb2_acl, 5563 .next_header = smb2_next_header, 5564 .ioctl_query_info = smb2_ioctl_query_info, 5565 .make_node = smb2_make_node, 5566 .fiemap = smb3_fiemap, 5567 .llseek = smb3_llseek, 5568 .is_status_io_timeout = smb2_is_status_io_timeout, 5569 .is_network_name_deleted = smb2_is_network_name_deleted, 5570 }; 5571 5572 struct smb_version_operations smb311_operations = { 5573 .compare_fids = smb2_compare_fids, 5574 .setup_request = smb2_setup_request, 5575 .setup_async_request = smb2_setup_async_request, 5576 .check_receive = smb2_check_receive, 5577 .add_credits = smb2_add_credits, 5578 .set_credits = smb2_set_credits, 5579 .get_credits_field = smb2_get_credits_field, 5580 .get_credits = smb2_get_credits, 5581 .wait_mtu_credits = smb2_wait_mtu_credits, 5582 .adjust_credits = smb2_adjust_credits, 5583 .get_next_mid = smb2_get_next_mid, 5584 .revert_current_mid = smb2_revert_current_mid, 5585 .read_data_offset = smb2_read_data_offset, 5586 .read_data_length = smb2_read_data_length, 5587 .map_error = map_smb2_to_linux_error, 5588 .find_mid = smb2_find_mid, 5589 .check_message = smb2_check_message, 5590 .dump_detail = smb2_dump_detail, 5591 .clear_stats = smb2_clear_stats, 5592 .print_stats = smb2_print_stats, 5593 .dump_share_caps = smb2_dump_share_caps, 5594 .is_oplock_break = smb2_is_valid_oplock_break, 5595 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5596 .downgrade_oplock = smb3_downgrade_oplock, 5597 .need_neg = smb2_need_neg, 5598 .negotiate = smb2_negotiate, 5599 .negotiate_wsize = smb3_negotiate_wsize, 5600 .negotiate_rsize = smb3_negotiate_rsize, 5601 .sess_setup = SMB2_sess_setup, 5602 .logoff = SMB2_logoff, 5603 .tree_connect = SMB2_tcon, 5604 .tree_disconnect = SMB2_tdis, 5605 .qfs_tcon = smb3_qfs_tcon, 5606 .is_path_accessible = smb2_is_path_accessible, 5607 .can_echo = smb2_can_echo, 5608 .echo = SMB2_echo, 5609 .query_path_info = smb2_query_path_info, 5610 .query_reparse_tag = smb2_query_reparse_tag, 5611 .get_srv_inum = smb2_get_srv_inum, 5612 .query_file_info = smb2_query_file_info, 5613 .set_path_size = smb2_set_path_size, 5614 .set_file_size = smb2_set_file_size, 5615 .set_file_info = smb2_set_file_info, 5616 .set_compression = smb2_set_compression, 5617 .mkdir = smb2_mkdir, 5618 .mkdir_setinfo = smb2_mkdir_setinfo, 5619 .posix_mkdir = smb311_posix_mkdir, 5620 .rmdir = smb2_rmdir, 5621 .unlink = smb2_unlink, 5622 .rename = smb2_rename_path, 5623 .create_hardlink = smb2_create_hardlink, 5624 .query_symlink = smb2_query_symlink, 5625 .query_mf_symlink = smb3_query_mf_symlink, 5626 .create_mf_symlink = smb3_create_mf_symlink, 5627 .open = smb2_open_file, 5628 .set_fid = smb2_set_fid, 5629 .close = smb2_close_file, 5630 .close_getattr = smb2_close_getattr, 5631 .flush = smb2_flush_file, 5632 .async_readv = smb2_async_readv, 5633 .async_writev = smb2_async_writev, 5634 .sync_read = smb2_sync_read, 5635 .sync_write = smb2_sync_write, 5636 .query_dir_first = smb2_query_dir_first, 5637 .query_dir_next = smb2_query_dir_next, 5638 .close_dir = smb2_close_dir, 5639 .calc_smb_size = smb2_calc_size, 5640 .is_status_pending = smb2_is_status_pending, 5641 .is_session_expired = smb2_is_session_expired, 5642 .oplock_response = smb2_oplock_response, 5643 .queryfs = smb311_queryfs, 5644 .mand_lock = smb2_mand_lock, 5645 .mand_unlock_range = smb2_unlock_range, 5646 .push_mand_locks = smb2_push_mandatory_locks, 5647 .get_lease_key = smb2_get_lease_key, 5648 .set_lease_key = smb2_set_lease_key, 5649 .new_lease_key = smb2_new_lease_key, 5650 .generate_signingkey = generate_smb311signingkey, 5651 .calc_signature = smb3_calc_signature, 5652 .set_integrity = smb3_set_integrity, 5653 .is_read_op = smb21_is_read_op, 5654 .set_oplock_level = smb3_set_oplock_level, 5655 .create_lease_buf = smb3_create_lease_buf, 5656 .parse_lease_buf = smb3_parse_lease_buf, 5657 .copychunk_range = smb2_copychunk_range, 5658 .duplicate_extents = smb2_duplicate_extents, 5659 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5660 .wp_retry_size = smb2_wp_retry_size, 5661 .dir_needs_close = smb2_dir_needs_close, 5662 .fallocate = smb3_fallocate, 5663 .enum_snapshots = smb3_enum_snapshots, 5664 .notify = smb3_notify, 5665 .init_transform_rq = smb3_init_transform_rq, 5666 .is_transform_hdr = smb3_is_transform_hdr, 5667 .receive_transform = smb3_receive_transform, 5668 .get_dfs_refer = smb2_get_dfs_refer, 5669 .select_sectype = smb2_select_sectype, 5670 #ifdef CONFIG_CIFS_XATTR 5671 .query_all_EAs = smb2_query_eas, 5672 .set_EA = smb2_set_ea, 5673 #endif /* CIFS_XATTR */ 5674 .get_acl = get_smb2_acl, 5675 .get_acl_by_fid = get_smb2_acl_by_fid, 5676 .set_acl = set_smb2_acl, 5677 .next_header = smb2_next_header, 5678 .ioctl_query_info = smb2_ioctl_query_info, 5679 .make_node = smb2_make_node, 5680 .fiemap = smb3_fiemap, 5681 .llseek = smb3_llseek, 5682 .is_status_io_timeout = smb2_is_status_io_timeout, 5683 .is_network_name_deleted = smb2_is_network_name_deleted, 5684 }; 5685 5686 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5687 struct smb_version_values smb20_values = { 5688 .version_string = SMB20_VERSION_STRING, 5689 .protocol_id = SMB20_PROT_ID, 5690 .req_capabilities = 0, /* MBZ */ 5691 .large_lock_type = 0, 5692 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5693 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5694 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5695 .header_size = sizeof(struct smb2_hdr), 5696 .header_preamble_size = 0, 5697 .max_header_size = MAX_SMB2_HDR_SIZE, 5698 .read_rsp_size = sizeof(struct smb2_read_rsp), 5699 .lock_cmd = SMB2_LOCK, 5700 .cap_unix = 0, 5701 .cap_nt_find = SMB2_NT_FIND, 5702 .cap_large_files = SMB2_LARGE_FILES, 5703 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5704 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5705 .create_lease_size = sizeof(struct create_lease), 5706 }; 5707 #endif /* ALLOW_INSECURE_LEGACY */ 5708 5709 struct smb_version_values smb21_values = { 5710 .version_string = SMB21_VERSION_STRING, 5711 .protocol_id = SMB21_PROT_ID, 5712 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5713 .large_lock_type = 0, 5714 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5715 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5716 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5717 .header_size = sizeof(struct smb2_hdr), 5718 .header_preamble_size = 0, 5719 .max_header_size = MAX_SMB2_HDR_SIZE, 5720 .read_rsp_size = sizeof(struct smb2_read_rsp), 5721 .lock_cmd = SMB2_LOCK, 5722 .cap_unix = 0, 5723 .cap_nt_find = SMB2_NT_FIND, 5724 .cap_large_files = SMB2_LARGE_FILES, 5725 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5726 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5727 .create_lease_size = sizeof(struct create_lease), 5728 }; 5729 5730 struct smb_version_values smb3any_values = { 5731 .version_string = SMB3ANY_VERSION_STRING, 5732 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5733 .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, 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_v2), 5749 }; 5750 5751 struct smb_version_values smbdefault_values = { 5752 .version_string = SMBDEFAULT_VERSION_STRING, 5753 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5754 .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, 5755 .large_lock_type = 0, 5756 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5757 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5758 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5759 .header_size = sizeof(struct smb2_hdr), 5760 .header_preamble_size = 0, 5761 .max_header_size = MAX_SMB2_HDR_SIZE, 5762 .read_rsp_size = sizeof(struct smb2_read_rsp), 5763 .lock_cmd = SMB2_LOCK, 5764 .cap_unix = 0, 5765 .cap_nt_find = SMB2_NT_FIND, 5766 .cap_large_files = SMB2_LARGE_FILES, 5767 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5768 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5769 .create_lease_size = sizeof(struct create_lease_v2), 5770 }; 5771 5772 struct smb_version_values smb30_values = { 5773 .version_string = SMB30_VERSION_STRING, 5774 .protocol_id = SMB30_PROT_ID, 5775 .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, 5776 .large_lock_type = 0, 5777 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5778 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5779 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5780 .header_size = sizeof(struct smb2_hdr), 5781 .header_preamble_size = 0, 5782 .max_header_size = MAX_SMB2_HDR_SIZE, 5783 .read_rsp_size = sizeof(struct smb2_read_rsp), 5784 .lock_cmd = SMB2_LOCK, 5785 .cap_unix = 0, 5786 .cap_nt_find = SMB2_NT_FIND, 5787 .cap_large_files = SMB2_LARGE_FILES, 5788 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5789 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5790 .create_lease_size = sizeof(struct create_lease_v2), 5791 }; 5792 5793 struct smb_version_values smb302_values = { 5794 .version_string = SMB302_VERSION_STRING, 5795 .protocol_id = SMB302_PROT_ID, 5796 .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, 5797 .large_lock_type = 0, 5798 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5799 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5800 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5801 .header_size = sizeof(struct smb2_hdr), 5802 .header_preamble_size = 0, 5803 .max_header_size = MAX_SMB2_HDR_SIZE, 5804 .read_rsp_size = sizeof(struct smb2_read_rsp), 5805 .lock_cmd = SMB2_LOCK, 5806 .cap_unix = 0, 5807 .cap_nt_find = SMB2_NT_FIND, 5808 .cap_large_files = SMB2_LARGE_FILES, 5809 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5810 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5811 .create_lease_size = sizeof(struct create_lease_v2), 5812 }; 5813 5814 struct smb_version_values smb311_values = { 5815 .version_string = SMB311_VERSION_STRING, 5816 .protocol_id = SMB311_PROT_ID, 5817 .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, 5818 .large_lock_type = 0, 5819 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5820 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5821 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5822 .header_size = sizeof(struct smb2_hdr), 5823 .header_preamble_size = 0, 5824 .max_header_size = MAX_SMB2_HDR_SIZE, 5825 .read_rsp_size = sizeof(struct smb2_read_rsp), 5826 .lock_cmd = SMB2_LOCK, 5827 .cap_unix = 0, 5828 .cap_nt_find = SMB2_NT_FIND, 5829 .cap_large_files = SMB2_LARGE_FILES, 5830 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5831 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5832 .create_lease_size = sizeof(struct create_lease_v2), 5833 }; 5834