1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <uapi/linux/magic.h> 17 #include "cifsfs.h" 18 #include "cifsglob.h" 19 #include "smb2pdu.h" 20 #include "smb2proto.h" 21 #include "cifsproto.h" 22 #include "cifs_debug.h" 23 #include "cifs_unicode.h" 24 #include "smb2status.h" 25 #include "smb2glob.h" 26 #include "cifs_ioctl.h" 27 #include "smbdirect.h" 28 #include "fscache.h" 29 #include "fs_context.h" 30 #include "cached_dir.h" 31 32 /* Change credits for different ops and return the total number of credits */ 33 static int 34 change_conf(struct TCP_Server_Info *server) 35 { 36 server->credits += server->echo_credits + server->oplock_credits; 37 if (server->credits > server->max_credits) 38 server->credits = server->max_credits; 39 server->oplock_credits = server->echo_credits = 0; 40 switch (server->credits) { 41 case 0: 42 return 0; 43 case 1: 44 server->echoes = false; 45 server->oplocks = false; 46 break; 47 case 2: 48 server->echoes = true; 49 server->oplocks = false; 50 server->echo_credits = 1; 51 break; 52 default: 53 server->echoes = true; 54 if (enable_oplocks) { 55 server->oplocks = true; 56 server->oplock_credits = 1; 57 } else 58 server->oplocks = false; 59 60 server->echo_credits = 1; 61 } 62 server->credits -= server->echo_credits + server->oplock_credits; 63 return server->credits + server->echo_credits + server->oplock_credits; 64 } 65 66 static void 67 smb2_add_credits(struct TCP_Server_Info *server, 68 const struct cifs_credits *credits, const int optype) 69 { 70 int *val, rc = -1; 71 int scredits, in_flight; 72 unsigned int add = credits->value; 73 unsigned int instance = credits->instance; 74 bool reconnect_detected = false; 75 bool reconnect_with_invalid_credits = false; 76 77 spin_lock(&server->req_lock); 78 val = server->ops->get_credits_field(server, optype); 79 80 /* eg found case where write overlapping reconnect messed up credits */ 81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 82 reconnect_with_invalid_credits = true; 83 84 if ((instance == 0) || (instance == server->reconnect_instance)) 85 *val += add; 86 else 87 reconnect_detected = true; 88 89 if (*val > 65000) { 90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 91 pr_warn_once("server overflowed SMB3 credits\n"); 92 trace_smb3_overflow_credits(server->CurrentMid, 93 server->conn_id, server->hostname, *val, 94 add, server->in_flight); 95 } 96 WARN_ON_ONCE(server->in_flight == 0); 97 server->in_flight--; 98 if (server->in_flight == 0 && 99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 101 rc = change_conf(server); 102 /* 103 * Sometimes server returns 0 credits on oplock break ack - we need to 104 * rebalance credits in this case. 105 */ 106 else if (server->in_flight > 0 && server->oplock_credits == 0 && 107 server->oplocks) { 108 if (server->credits > 1) { 109 server->credits--; 110 server->oplock_credits++; 111 } 112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 114 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 115 change_conf(server); 116 117 scredits = *val; 118 in_flight = server->in_flight; 119 spin_unlock(&server->req_lock); 120 wake_up(&server->request_q); 121 122 if (reconnect_detected) { 123 trace_smb3_reconnect_detected(server->CurrentMid, 124 server->conn_id, server->hostname, scredits, add, in_flight); 125 126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 127 add, instance); 128 } 129 130 if (reconnect_with_invalid_credits) { 131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 132 server->conn_id, server->hostname, scredits, add, in_flight); 133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 134 optype, scredits, add); 135 } 136 137 spin_lock(&server->srv_lock); 138 if (server->tcpStatus == CifsNeedReconnect 139 || server->tcpStatus == CifsExiting) { 140 spin_unlock(&server->srv_lock); 141 return; 142 } 143 spin_unlock(&server->srv_lock); 144 145 switch (rc) { 146 case -1: 147 /* change_conf hasn't been executed */ 148 break; 149 case 0: 150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 151 break; 152 case 1: 153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 154 break; 155 case 2: 156 cifs_dbg(FYI, "disabling oplocks\n"); 157 break; 158 default: 159 /* change_conf rebalanced credits for different types */ 160 break; 161 } 162 163 trace_smb3_add_credits(server->CurrentMid, 164 server->conn_id, server->hostname, scredits, add, in_flight); 165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 166 } 167 168 static void 169 smb2_set_credits(struct TCP_Server_Info *server, const int val) 170 { 171 int scredits, in_flight; 172 173 spin_lock(&server->req_lock); 174 server->credits = val; 175 if (val == 1) { 176 server->reconnect_instance++; 177 /* 178 * ChannelSequence updated for all channels in primary channel so that consistent 179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 180 */ 181 if (SERVER_IS_CHAN(server)) 182 server->primary_server->channel_sequence_num++; 183 else 184 server->channel_sequence_num++; 185 } 186 scredits = server->credits; 187 in_flight = server->in_flight; 188 spin_unlock(&server->req_lock); 189 190 trace_smb3_set_credits(server->CurrentMid, 191 server->conn_id, server->hostname, scredits, val, in_flight); 192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 193 194 /* don't log while holding the lock */ 195 if (val == 1) 196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 197 } 198 199 static int * 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 201 { 202 switch (optype) { 203 case CIFS_ECHO_OP: 204 return &server->echo_credits; 205 case CIFS_OBREAK_OP: 206 return &server->oplock_credits; 207 default: 208 return &server->credits; 209 } 210 } 211 212 static unsigned int 213 smb2_get_credits(struct mid_q_entry *mid) 214 { 215 return mid->credits_received; 216 } 217 218 static int 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 220 unsigned int *num, struct cifs_credits *credits) 221 { 222 int rc = 0; 223 unsigned int scredits, in_flight; 224 225 spin_lock(&server->req_lock); 226 while (1) { 227 spin_unlock(&server->req_lock); 228 229 spin_lock(&server->srv_lock); 230 if (server->tcpStatus == CifsExiting) { 231 spin_unlock(&server->srv_lock); 232 return -ENOENT; 233 } 234 spin_unlock(&server->srv_lock); 235 236 spin_lock(&server->req_lock); 237 if (server->credits <= 0) { 238 spin_unlock(&server->req_lock); 239 cifs_num_waiters_inc(server); 240 rc = wait_event_killable(server->request_q, 241 has_credits(server, &server->credits, 1)); 242 cifs_num_waiters_dec(server); 243 if (rc) 244 return rc; 245 spin_lock(&server->req_lock); 246 } else { 247 scredits = server->credits; 248 /* can deadlock with reopen */ 249 if (scredits <= 8) { 250 *num = SMB2_MAX_BUFFER_SIZE; 251 credits->value = 0; 252 credits->instance = 0; 253 break; 254 } 255 256 /* leave some credits for reopen and other ops */ 257 scredits -= 8; 258 *num = min_t(unsigned int, size, 259 scredits * SMB2_MAX_BUFFER_SIZE); 260 261 credits->value = 262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 263 credits->instance = server->reconnect_instance; 264 server->credits -= credits->value; 265 server->in_flight++; 266 if (server->in_flight > server->max_in_flight) 267 server->max_in_flight = server->in_flight; 268 break; 269 } 270 } 271 scredits = server->credits; 272 in_flight = server->in_flight; 273 spin_unlock(&server->req_lock); 274 275 trace_smb3_wait_credits(server->CurrentMid, 276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 278 __func__, credits->value, scredits); 279 280 return rc; 281 } 282 283 static int 284 smb2_adjust_credits(struct TCP_Server_Info *server, 285 struct cifs_credits *credits, 286 const unsigned int payload_size) 287 { 288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 289 int scredits, in_flight; 290 291 if (!credits->value || credits->value == new_val) 292 return 0; 293 294 if (credits->value < new_val) { 295 trace_smb3_too_many_credits(server->CurrentMid, 296 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 298 credits->value, new_val); 299 300 return -EOPNOTSUPP; 301 } 302 303 spin_lock(&server->req_lock); 304 305 if (server->reconnect_instance != credits->instance) { 306 scredits = server->credits; 307 in_flight = server->in_flight; 308 spin_unlock(&server->req_lock); 309 310 trace_smb3_reconnect_detected(server->CurrentMid, 311 server->conn_id, server->hostname, scredits, 312 credits->value - new_val, in_flight); 313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 314 credits->value - new_val); 315 return -EAGAIN; 316 } 317 318 server->credits += credits->value - new_val; 319 scredits = server->credits; 320 in_flight = server->in_flight; 321 spin_unlock(&server->req_lock); 322 wake_up(&server->request_q); 323 324 trace_smb3_adj_credits(server->CurrentMid, 325 server->conn_id, server->hostname, scredits, 326 credits->value - new_val, in_flight); 327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 328 __func__, credits->value - new_val, scredits); 329 330 credits->value = new_val; 331 332 return 0; 333 } 334 335 static __u64 336 smb2_get_next_mid(struct TCP_Server_Info *server) 337 { 338 __u64 mid; 339 /* for SMB2 we need the current value */ 340 spin_lock(&server->mid_lock); 341 mid = server->CurrentMid++; 342 spin_unlock(&server->mid_lock); 343 return mid; 344 } 345 346 static void 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 348 { 349 spin_lock(&server->mid_lock); 350 if (server->CurrentMid >= val) 351 server->CurrentMid -= val; 352 spin_unlock(&server->mid_lock); 353 } 354 355 static struct mid_q_entry * 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 357 { 358 struct mid_q_entry *mid; 359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 360 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 361 362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 364 return NULL; 365 } 366 367 spin_lock(&server->mid_lock); 368 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 369 if ((mid->mid == wire_mid) && 370 (mid->mid_state == MID_REQUEST_SUBMITTED) && 371 (mid->command == shdr->Command)) { 372 kref_get(&mid->refcount); 373 if (dequeue) { 374 list_del_init(&mid->qhead); 375 mid->mid_flags |= MID_DELETED; 376 } 377 spin_unlock(&server->mid_lock); 378 return mid; 379 } 380 } 381 spin_unlock(&server->mid_lock); 382 return NULL; 383 } 384 385 static struct mid_q_entry * 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 387 { 388 return __smb2_find_mid(server, buf, false); 389 } 390 391 static struct mid_q_entry * 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 393 { 394 return __smb2_find_mid(server, buf, true); 395 } 396 397 static void 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 399 { 400 #ifdef CONFIG_CIFS_DEBUG2 401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 402 403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 405 shdr->Id.SyncId.ProcessId); 406 if (!server->ops->check_message(buf, server->total_read, server)) { 407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 408 server->ops->calc_smb_size(buf)); 409 } 410 #endif 411 } 412 413 static bool 414 smb2_need_neg(struct TCP_Server_Info *server) 415 { 416 return server->max_read == 0; 417 } 418 419 static int 420 smb2_negotiate(const unsigned int xid, 421 struct cifs_ses *ses, 422 struct TCP_Server_Info *server) 423 { 424 int rc; 425 426 spin_lock(&server->mid_lock); 427 server->CurrentMid = 0; 428 spin_unlock(&server->mid_lock); 429 rc = SMB2_negotiate(xid, ses, server); 430 /* BB we probably don't need to retry with modern servers */ 431 if (rc == -EAGAIN) 432 rc = -EHOSTDOWN; 433 return rc; 434 } 435 436 static unsigned int 437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 438 { 439 struct TCP_Server_Info *server = tcon->ses->server; 440 unsigned int wsize; 441 442 /* start with specified wsize, or default */ 443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 444 wsize = min_t(unsigned int, wsize, server->max_write); 445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 447 448 return wsize; 449 } 450 451 static unsigned int 452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 453 { 454 struct TCP_Server_Info *server = tcon->ses->server; 455 unsigned int wsize; 456 457 /* start with specified wsize, or default */ 458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 459 wsize = min_t(unsigned int, wsize, server->max_write); 460 #ifdef CONFIG_CIFS_SMB_DIRECT 461 if (server->rdma) { 462 if (server->sign) 463 /* 464 * Account for SMB2 data transfer packet header and 465 * possible encryption header 466 */ 467 wsize = min_t(unsigned int, 468 wsize, 469 server->smbd_conn->max_fragmented_send_size - 470 SMB2_READWRITE_PDU_HEADER_SIZE - 471 sizeof(struct smb2_transform_hdr)); 472 else 473 wsize = min_t(unsigned int, 474 wsize, server->smbd_conn->max_readwrite_size); 475 } 476 #endif 477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 479 480 return wsize; 481 } 482 483 static unsigned int 484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 485 { 486 struct TCP_Server_Info *server = tcon->ses->server; 487 unsigned int rsize; 488 489 /* start with specified rsize, or default */ 490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 491 rsize = min_t(unsigned int, rsize, server->max_read); 492 493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 495 496 return rsize; 497 } 498 499 static unsigned int 500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 501 { 502 struct TCP_Server_Info *server = tcon->ses->server; 503 unsigned int rsize; 504 505 /* start with specified rsize, or default */ 506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 507 rsize = min_t(unsigned int, rsize, server->max_read); 508 #ifdef CONFIG_CIFS_SMB_DIRECT 509 if (server->rdma) { 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 rsize = min_t(unsigned int, 516 rsize, 517 server->smbd_conn->max_fragmented_recv_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 rsize = min_t(unsigned int, 522 rsize, server->smbd_conn->max_readwrite_size); 523 } 524 #endif 525 526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 528 529 return rsize; 530 } 531 532 /* 533 * compare two interfaces a and b 534 * return 0 if everything matches. 535 * return 1 if a is rdma capable, or rss capable, or has higher link speed 536 * return -1 otherwise. 537 */ 538 static int 539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 540 { 541 int cmp_ret = 0; 542 543 WARN_ON(!a || !b); 544 if (a->rdma_capable == b->rdma_capable) { 545 if (a->rss_capable == b->rss_capable) { 546 if (a->speed == b->speed) { 547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 548 (struct sockaddr *) &b->sockaddr); 549 if (!cmp_ret) 550 return 0; 551 else if (cmp_ret > 0) 552 return 1; 553 else 554 return -1; 555 } else if (a->speed > b->speed) 556 return 1; 557 else 558 return -1; 559 } else if (a->rss_capable > b->rss_capable) 560 return 1; 561 else 562 return -1; 563 } else if (a->rdma_capable > b->rdma_capable) 564 return 1; 565 else 566 return -1; 567 } 568 569 static int 570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 571 size_t buf_len, struct cifs_ses *ses, bool in_mount) 572 { 573 struct network_interface_info_ioctl_rsp *p; 574 struct sockaddr_in *addr4; 575 struct sockaddr_in6 *addr6; 576 struct iface_info_ipv4 *p4; 577 struct iface_info_ipv6 *p6; 578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 579 struct cifs_server_iface tmp_iface; 580 ssize_t bytes_left; 581 size_t next = 0; 582 int nb_iface = 0; 583 int rc = 0, ret = 0; 584 585 bytes_left = buf_len; 586 p = buf; 587 588 spin_lock(&ses->iface_lock); 589 /* do not query too frequently, this time with lock held */ 590 if (ses->iface_last_update && 591 time_before(jiffies, ses->iface_last_update + 592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 593 spin_unlock(&ses->iface_lock); 594 return 0; 595 } 596 597 /* 598 * Go through iface_list and mark them as inactive 599 */ 600 list_for_each_entry_safe(iface, niface, &ses->iface_list, 601 iface_head) 602 iface->is_active = 0; 603 604 spin_unlock(&ses->iface_lock); 605 606 /* 607 * Samba server e.g. can return an empty interface list in some cases, 608 * which would only be a problem if we were requesting multichannel 609 */ 610 if (bytes_left == 0) { 611 /* avoid spamming logs every 10 minutes, so log only in mount */ 612 if ((ses->chan_max > 1) && in_mount) 613 cifs_dbg(VFS, 614 "multichannel not available\n" 615 "Empty network interface list returned by server %s\n", 616 ses->server->hostname); 617 rc = -EOPNOTSUPP; 618 ses->iface_last_update = jiffies; 619 goto out; 620 } 621 622 while (bytes_left >= sizeof(*p)) { 623 memset(&tmp_iface, 0, sizeof(tmp_iface)); 624 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 625 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 626 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 627 628 switch (p->Family) { 629 /* 630 * The kernel and wire socket structures have the same 631 * layout and use network byte order but make the 632 * conversion explicit in case either one changes. 633 */ 634 case INTERNETWORK: 635 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 636 p4 = (struct iface_info_ipv4 *)p->Buffer; 637 addr4->sin_family = AF_INET; 638 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 639 640 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 641 addr4->sin_port = cpu_to_be16(CIFS_PORT); 642 643 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 644 &addr4->sin_addr); 645 break; 646 case INTERNETWORKV6: 647 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 648 p6 = (struct iface_info_ipv6 *)p->Buffer; 649 addr6->sin6_family = AF_INET6; 650 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 651 652 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 653 addr6->sin6_flowinfo = 0; 654 addr6->sin6_scope_id = 0; 655 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 656 657 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 658 &addr6->sin6_addr); 659 break; 660 default: 661 cifs_dbg(VFS, 662 "%s: skipping unsupported socket family\n", 663 __func__); 664 goto next_iface; 665 } 666 667 /* 668 * The iface_list is assumed to be sorted by speed. 669 * Check if the new interface exists in that list. 670 * NEVER change iface. it could be in use. 671 * Add a new one instead 672 */ 673 spin_lock(&ses->iface_lock); 674 list_for_each_entry_safe(iface, niface, &ses->iface_list, 675 iface_head) { 676 ret = iface_cmp(iface, &tmp_iface); 677 if (!ret) { 678 iface->is_active = 1; 679 spin_unlock(&ses->iface_lock); 680 goto next_iface; 681 } else if (ret < 0) { 682 /* all remaining ifaces are slower */ 683 kref_get(&iface->refcount); 684 break; 685 } 686 } 687 spin_unlock(&ses->iface_lock); 688 689 /* no match. insert the entry in the list */ 690 info = kmalloc(sizeof(struct cifs_server_iface), 691 GFP_KERNEL); 692 if (!info) { 693 rc = -ENOMEM; 694 goto out; 695 } 696 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 697 698 /* add this new entry to the list */ 699 kref_init(&info->refcount); 700 info->is_active = 1; 701 702 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 703 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 704 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 705 le32_to_cpu(p->Capability)); 706 707 spin_lock(&ses->iface_lock); 708 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 709 list_add_tail(&info->iface_head, &iface->iface_head); 710 kref_put(&iface->refcount, release_iface); 711 } else 712 list_add_tail(&info->iface_head, &ses->iface_list); 713 714 ses->iface_count++; 715 spin_unlock(&ses->iface_lock); 716 next_iface: 717 nb_iface++; 718 next = le32_to_cpu(p->Next); 719 if (!next) { 720 bytes_left -= sizeof(*p); 721 break; 722 } 723 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 724 bytes_left -= next; 725 } 726 727 if (!nb_iface) { 728 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 729 rc = -EINVAL; 730 goto out; 731 } 732 733 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 734 if ((bytes_left > 8) || p->Next) 735 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 736 737 ses->iface_last_update = jiffies; 738 739 out: 740 /* 741 * Go through the list again and put the inactive entries 742 */ 743 spin_lock(&ses->iface_lock); 744 list_for_each_entry_safe(iface, niface, &ses->iface_list, 745 iface_head) { 746 if (!iface->is_active) { 747 list_del(&iface->iface_head); 748 kref_put(&iface->refcount, release_iface); 749 ses->iface_count--; 750 } 751 } 752 spin_unlock(&ses->iface_lock); 753 754 return rc; 755 } 756 757 int 758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 759 { 760 int rc; 761 unsigned int ret_data_len = 0; 762 struct network_interface_info_ioctl_rsp *out_buf = NULL; 763 struct cifs_ses *ses = tcon->ses; 764 struct TCP_Server_Info *pserver; 765 766 /* do not query too frequently */ 767 if (ses->iface_last_update && 768 time_before(jiffies, ses->iface_last_update + 769 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 770 return 0; 771 772 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 773 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 774 NULL /* no data input */, 0 /* no data input */, 775 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 776 if (rc == -EOPNOTSUPP) { 777 cifs_dbg(FYI, 778 "server does not support query network interfaces\n"); 779 ret_data_len = 0; 780 } else if (rc != 0) { 781 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 782 goto out; 783 } 784 785 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 786 if (rc) 787 goto out; 788 789 /* check if iface is still active */ 790 spin_lock(&ses->chan_lock); 791 pserver = ses->chans[0].server; 792 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 793 spin_unlock(&ses->chan_lock); 794 cifs_chan_update_iface(ses, pserver); 795 spin_lock(&ses->chan_lock); 796 } 797 spin_unlock(&ses->chan_lock); 798 799 out: 800 kfree(out_buf); 801 return rc; 802 } 803 804 static void 805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 806 struct cifs_sb_info *cifs_sb) 807 { 808 int rc; 809 __le16 srch_path = 0; /* Null - open root of share */ 810 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 811 struct cifs_open_parms oparms; 812 struct cifs_fid fid; 813 struct cached_fid *cfid = NULL; 814 815 oparms = (struct cifs_open_parms) { 816 .tcon = tcon, 817 .path = "", 818 .desired_access = FILE_READ_ATTRIBUTES, 819 .disposition = FILE_OPEN, 820 .create_options = cifs_create_options(cifs_sb, 0), 821 .fid = &fid, 822 }; 823 824 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 825 if (rc == 0) 826 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 827 else 828 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 829 NULL, NULL); 830 if (rc) 831 return; 832 833 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 834 835 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 836 FS_ATTRIBUTE_INFORMATION); 837 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 838 FS_DEVICE_INFORMATION); 839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 840 FS_VOLUME_INFORMATION); 841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 842 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 843 if (cfid == NULL) 844 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 845 else 846 close_cached_dir(cfid); 847 } 848 849 static void 850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 851 struct cifs_sb_info *cifs_sb) 852 { 853 int rc; 854 __le16 srch_path = 0; /* Null - open root of share */ 855 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 856 struct cifs_open_parms oparms; 857 struct cifs_fid fid; 858 859 oparms = (struct cifs_open_parms) { 860 .tcon = tcon, 861 .path = "", 862 .desired_access = FILE_READ_ATTRIBUTES, 863 .disposition = FILE_OPEN, 864 .create_options = cifs_create_options(cifs_sb, 0), 865 .fid = &fid, 866 }; 867 868 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 869 NULL, NULL); 870 if (rc) 871 return; 872 873 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 874 FS_ATTRIBUTE_INFORMATION); 875 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 876 FS_DEVICE_INFORMATION); 877 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 878 } 879 880 static int 881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 882 struct cifs_sb_info *cifs_sb, const char *full_path) 883 { 884 __le16 *utf16_path; 885 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 886 int err_buftype = CIFS_NO_BUFFER; 887 struct cifs_open_parms oparms; 888 struct kvec err_iov = {}; 889 struct cifs_fid fid; 890 struct cached_fid *cfid; 891 bool islink; 892 int rc, rc2; 893 894 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 895 if (!rc) { 896 if (cfid->has_lease) { 897 close_cached_dir(cfid); 898 return 0; 899 } 900 close_cached_dir(cfid); 901 } 902 903 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 904 if (!utf16_path) 905 return -ENOMEM; 906 907 oparms = (struct cifs_open_parms) { 908 .tcon = tcon, 909 .path = full_path, 910 .desired_access = FILE_READ_ATTRIBUTES, 911 .disposition = FILE_OPEN, 912 .create_options = cifs_create_options(cifs_sb, 0), 913 .fid = &fid, 914 }; 915 916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 917 &err_iov, &err_buftype); 918 if (rc) { 919 struct smb2_hdr *hdr = err_iov.iov_base; 920 921 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 922 goto out; 923 924 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 925 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 926 full_path, &islink); 927 if (rc2) { 928 rc = rc2; 929 goto out; 930 } 931 if (islink) 932 rc = -EREMOTE; 933 } 934 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 935 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 936 rc = -EOPNOTSUPP; 937 goto out; 938 } 939 940 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 941 942 out: 943 free_rsp_buf(err_buftype, err_iov.iov_base); 944 kfree(utf16_path); 945 return rc; 946 } 947 948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 949 struct cifs_sb_info *cifs_sb, const char *full_path, 950 u64 *uniqueid, struct cifs_open_info_data *data) 951 { 952 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 953 return 0; 954 } 955 956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 957 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 958 { 959 struct cifs_fid *fid = &cfile->fid; 960 961 if (cfile->symlink_target) { 962 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 963 if (!data->symlink_target) 964 return -ENOMEM; 965 } 966 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 967 } 968 969 #ifdef CONFIG_CIFS_XATTR 970 static ssize_t 971 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 972 struct smb2_file_full_ea_info *src, size_t src_size, 973 const unsigned char *ea_name) 974 { 975 int rc = 0; 976 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 977 char *name, *value; 978 size_t buf_size = dst_size; 979 size_t name_len, value_len, user_name_len; 980 981 while (src_size > 0) { 982 name_len = (size_t)src->ea_name_length; 983 value_len = (size_t)le16_to_cpu(src->ea_value_length); 984 985 if (name_len == 0) 986 break; 987 988 if (src_size < 8 + name_len + 1 + value_len) { 989 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 990 rc = -EIO; 991 goto out; 992 } 993 994 name = &src->ea_data[0]; 995 value = &src->ea_data[src->ea_name_length + 1]; 996 997 if (ea_name) { 998 if (ea_name_len == name_len && 999 memcmp(ea_name, name, name_len) == 0) { 1000 rc = value_len; 1001 if (dst_size == 0) 1002 goto out; 1003 if (dst_size < value_len) { 1004 rc = -ERANGE; 1005 goto out; 1006 } 1007 memcpy(dst, value, value_len); 1008 goto out; 1009 } 1010 } else { 1011 /* 'user.' plus a terminating null */ 1012 user_name_len = 5 + 1 + name_len; 1013 1014 if (buf_size == 0) { 1015 /* skip copy - calc size only */ 1016 rc += user_name_len; 1017 } else if (dst_size >= user_name_len) { 1018 dst_size -= user_name_len; 1019 memcpy(dst, "user.", 5); 1020 dst += 5; 1021 memcpy(dst, src->ea_data, name_len); 1022 dst += name_len; 1023 *dst = 0; 1024 ++dst; 1025 rc += user_name_len; 1026 } else { 1027 /* stop before overrun buffer */ 1028 rc = -ERANGE; 1029 break; 1030 } 1031 } 1032 1033 if (!src->next_entry_offset) 1034 break; 1035 1036 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1037 /* stop before overrun buffer */ 1038 rc = -ERANGE; 1039 break; 1040 } 1041 src_size -= le32_to_cpu(src->next_entry_offset); 1042 src = (void *)((char *)src + 1043 le32_to_cpu(src->next_entry_offset)); 1044 } 1045 1046 /* didn't find the named attribute */ 1047 if (ea_name) 1048 rc = -ENODATA; 1049 1050 out: 1051 return (ssize_t)rc; 1052 } 1053 1054 static ssize_t 1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1056 const unsigned char *path, const unsigned char *ea_name, 1057 char *ea_data, size_t buf_size, 1058 struct cifs_sb_info *cifs_sb) 1059 { 1060 int rc; 1061 struct kvec rsp_iov = {NULL, 0}; 1062 int buftype = CIFS_NO_BUFFER; 1063 struct smb2_query_info_rsp *rsp; 1064 struct smb2_file_full_ea_info *info = NULL; 1065 1066 rc = smb2_query_info_compound(xid, tcon, path, 1067 FILE_READ_EA, 1068 FILE_FULL_EA_INFORMATION, 1069 SMB2_O_INFO_FILE, 1070 CIFSMaxBufSize - 1071 MAX_SMB2_CREATE_RESPONSE_SIZE - 1072 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1073 &rsp_iov, &buftype, cifs_sb); 1074 if (rc) { 1075 /* 1076 * If ea_name is NULL (listxattr) and there are no EAs, 1077 * return 0 as it's not an error. Otherwise, the specified 1078 * ea_name was not found. 1079 */ 1080 if (!ea_name && rc == -ENODATA) 1081 rc = 0; 1082 goto qeas_exit; 1083 } 1084 1085 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1086 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1087 le32_to_cpu(rsp->OutputBufferLength), 1088 &rsp_iov, 1089 sizeof(struct smb2_file_full_ea_info)); 1090 if (rc) 1091 goto qeas_exit; 1092 1093 info = (struct smb2_file_full_ea_info *)( 1094 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1095 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1096 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1097 1098 qeas_exit: 1099 free_rsp_buf(buftype, rsp_iov.iov_base); 1100 return rc; 1101 } 1102 1103 static int 1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1105 const char *path, const char *ea_name, const void *ea_value, 1106 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1107 struct cifs_sb_info *cifs_sb) 1108 { 1109 struct smb2_compound_vars *vars; 1110 struct cifs_ses *ses = tcon->ses; 1111 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1112 struct smb_rqst *rqst; 1113 struct kvec *rsp_iov; 1114 __le16 *utf16_path = NULL; 1115 int ea_name_len = strlen(ea_name); 1116 int flags = CIFS_CP_CREATE_CLOSE_OP; 1117 int len; 1118 int resp_buftype[3]; 1119 struct cifs_open_parms oparms; 1120 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1121 struct cifs_fid fid; 1122 unsigned int size[1]; 1123 void *data[1]; 1124 struct smb2_file_full_ea_info *ea = NULL; 1125 struct smb2_query_info_rsp *rsp; 1126 int rc, used_len = 0; 1127 1128 if (smb3_encryption_required(tcon)) 1129 flags |= CIFS_TRANSFORM_REQ; 1130 1131 if (ea_name_len > 255) 1132 return -EINVAL; 1133 1134 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1135 if (!utf16_path) 1136 return -ENOMEM; 1137 1138 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1139 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1140 if (!vars) { 1141 rc = -ENOMEM; 1142 goto out_free_path; 1143 } 1144 rqst = vars->rqst; 1145 rsp_iov = vars->rsp_iov; 1146 1147 if (ses->server->ops->query_all_EAs) { 1148 if (!ea_value) { 1149 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1150 ea_name, NULL, 0, 1151 cifs_sb); 1152 if (rc == -ENODATA) 1153 goto sea_exit; 1154 } else { 1155 /* If we are adding a attribute we should first check 1156 * if there will be enough space available to store 1157 * the new EA. If not we should not add it since we 1158 * would not be able to even read the EAs back. 1159 */ 1160 rc = smb2_query_info_compound(xid, tcon, path, 1161 FILE_READ_EA, 1162 FILE_FULL_EA_INFORMATION, 1163 SMB2_O_INFO_FILE, 1164 CIFSMaxBufSize - 1165 MAX_SMB2_CREATE_RESPONSE_SIZE - 1166 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1167 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1168 if (rc == 0) { 1169 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1170 used_len = le32_to_cpu(rsp->OutputBufferLength); 1171 } 1172 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1173 resp_buftype[1] = CIFS_NO_BUFFER; 1174 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1175 rc = 0; 1176 1177 /* Use a fudge factor of 256 bytes in case we collide 1178 * with a different set_EAs command. 1179 */ 1180 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1181 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1182 used_len + ea_name_len + ea_value_len + 1) { 1183 rc = -ENOSPC; 1184 goto sea_exit; 1185 } 1186 } 1187 } 1188 1189 /* Open */ 1190 rqst[0].rq_iov = vars->open_iov; 1191 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1192 1193 oparms = (struct cifs_open_parms) { 1194 .tcon = tcon, 1195 .path = path, 1196 .desired_access = FILE_WRITE_EA, 1197 .disposition = FILE_OPEN, 1198 .create_options = cifs_create_options(cifs_sb, 0), 1199 .fid = &fid, 1200 }; 1201 1202 rc = SMB2_open_init(tcon, server, 1203 &rqst[0], &oplock, &oparms, utf16_path); 1204 if (rc) 1205 goto sea_exit; 1206 smb2_set_next_command(tcon, &rqst[0]); 1207 1208 1209 /* Set Info */ 1210 rqst[1].rq_iov = vars->si_iov; 1211 rqst[1].rq_nvec = 1; 1212 1213 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1214 ea = kzalloc(len, GFP_KERNEL); 1215 if (ea == NULL) { 1216 rc = -ENOMEM; 1217 goto sea_exit; 1218 } 1219 1220 ea->ea_name_length = ea_name_len; 1221 ea->ea_value_length = cpu_to_le16(ea_value_len); 1222 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1223 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1224 1225 size[0] = len; 1226 data[0] = ea; 1227 1228 rc = SMB2_set_info_init(tcon, server, 1229 &rqst[1], COMPOUND_FID, 1230 COMPOUND_FID, current->tgid, 1231 FILE_FULL_EA_INFORMATION, 1232 SMB2_O_INFO_FILE, 0, data, size); 1233 if (rc) 1234 goto sea_exit; 1235 smb2_set_next_command(tcon, &rqst[1]); 1236 smb2_set_related(&rqst[1]); 1237 1238 /* Close */ 1239 rqst[2].rq_iov = &vars->close_iov; 1240 rqst[2].rq_nvec = 1; 1241 rc = SMB2_close_init(tcon, server, 1242 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1243 if (rc) 1244 goto sea_exit; 1245 smb2_set_related(&rqst[2]); 1246 1247 rc = compound_send_recv(xid, ses, server, 1248 flags, 3, rqst, 1249 resp_buftype, rsp_iov); 1250 /* no need to bump num_remote_opens because handle immediately closed */ 1251 1252 sea_exit: 1253 kfree(ea); 1254 SMB2_open_free(&rqst[0]); 1255 SMB2_set_info_free(&rqst[1]); 1256 SMB2_close_free(&rqst[2]); 1257 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1258 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1259 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1260 kfree(vars); 1261 out_free_path: 1262 kfree(utf16_path); 1263 return rc; 1264 } 1265 #endif 1266 1267 static bool 1268 smb2_can_echo(struct TCP_Server_Info *server) 1269 { 1270 return server->echoes; 1271 } 1272 1273 static void 1274 smb2_clear_stats(struct cifs_tcon *tcon) 1275 { 1276 int i; 1277 1278 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1279 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1280 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1281 } 1282 } 1283 1284 static void 1285 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1286 { 1287 seq_puts(m, "\n\tShare Capabilities:"); 1288 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1289 seq_puts(m, " DFS,"); 1290 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1291 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1292 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1293 seq_puts(m, " SCALEOUT,"); 1294 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1295 seq_puts(m, " CLUSTER,"); 1296 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1297 seq_puts(m, " ASYMMETRIC,"); 1298 if (tcon->capabilities == 0) 1299 seq_puts(m, " None"); 1300 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1301 seq_puts(m, " Aligned,"); 1302 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1303 seq_puts(m, " Partition Aligned,"); 1304 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1305 seq_puts(m, " SSD,"); 1306 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1307 seq_puts(m, " TRIM-support,"); 1308 1309 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1310 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1311 if (tcon->perf_sector_size) 1312 seq_printf(m, "\tOptimal sector size: 0x%x", 1313 tcon->perf_sector_size); 1314 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1315 } 1316 1317 static void 1318 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1319 { 1320 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1321 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1322 1323 /* 1324 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1325 * totals (requests sent) since those SMBs are per-session not per tcon 1326 */ 1327 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1328 (long long)(tcon->bytes_read), 1329 (long long)(tcon->bytes_written)); 1330 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1331 atomic_read(&tcon->num_local_opens), 1332 atomic_read(&tcon->num_remote_opens)); 1333 seq_printf(m, "\nTreeConnects: %d total %d failed", 1334 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1335 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1336 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1337 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1338 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1339 seq_printf(m, "\nCreates: %d total %d failed", 1340 atomic_read(&sent[SMB2_CREATE_HE]), 1341 atomic_read(&failed[SMB2_CREATE_HE])); 1342 seq_printf(m, "\nCloses: %d total %d failed", 1343 atomic_read(&sent[SMB2_CLOSE_HE]), 1344 atomic_read(&failed[SMB2_CLOSE_HE])); 1345 seq_printf(m, "\nFlushes: %d total %d failed", 1346 atomic_read(&sent[SMB2_FLUSH_HE]), 1347 atomic_read(&failed[SMB2_FLUSH_HE])); 1348 seq_printf(m, "\nReads: %d total %d failed", 1349 atomic_read(&sent[SMB2_READ_HE]), 1350 atomic_read(&failed[SMB2_READ_HE])); 1351 seq_printf(m, "\nWrites: %d total %d failed", 1352 atomic_read(&sent[SMB2_WRITE_HE]), 1353 atomic_read(&failed[SMB2_WRITE_HE])); 1354 seq_printf(m, "\nLocks: %d total %d failed", 1355 atomic_read(&sent[SMB2_LOCK_HE]), 1356 atomic_read(&failed[SMB2_LOCK_HE])); 1357 seq_printf(m, "\nIOCTLs: %d total %d failed", 1358 atomic_read(&sent[SMB2_IOCTL_HE]), 1359 atomic_read(&failed[SMB2_IOCTL_HE])); 1360 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1361 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1362 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1363 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1364 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1365 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1366 seq_printf(m, "\nQueryInfos: %d total %d failed", 1367 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1368 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1369 seq_printf(m, "\nSetInfos: %d total %d failed", 1370 atomic_read(&sent[SMB2_SET_INFO_HE]), 1371 atomic_read(&failed[SMB2_SET_INFO_HE])); 1372 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1373 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1374 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1375 } 1376 1377 static void 1378 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1379 { 1380 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1381 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1382 1383 cfile->fid.persistent_fid = fid->persistent_fid; 1384 cfile->fid.volatile_fid = fid->volatile_fid; 1385 cfile->fid.access = fid->access; 1386 #ifdef CONFIG_CIFS_DEBUG2 1387 cfile->fid.mid = fid->mid; 1388 #endif /* CIFS_DEBUG2 */ 1389 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1390 &fid->purge_cache); 1391 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1392 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1393 } 1394 1395 static void 1396 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1397 struct cifs_fid *fid) 1398 { 1399 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1400 } 1401 1402 static void 1403 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1404 struct cifsFileInfo *cfile) 1405 { 1406 struct smb2_file_network_open_info file_inf; 1407 struct inode *inode; 1408 int rc; 1409 1410 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1411 cfile->fid.volatile_fid, &file_inf); 1412 if (rc) 1413 return; 1414 1415 inode = d_inode(cfile->dentry); 1416 1417 spin_lock(&inode->i_lock); 1418 CIFS_I(inode)->time = jiffies; 1419 1420 /* Creation time should not need to be updated on close */ 1421 if (file_inf.LastWriteTime) 1422 inode_set_mtime_to_ts(inode, 1423 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1424 if (file_inf.ChangeTime) 1425 inode_set_ctime_to_ts(inode, 1426 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1427 if (file_inf.LastAccessTime) 1428 inode_set_atime_to_ts(inode, 1429 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1430 1431 /* 1432 * i_blocks is not related to (i_size / i_blksize), 1433 * but instead 512 byte (2**9) size is required for 1434 * calculating num blocks. 1435 */ 1436 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1437 inode->i_blocks = 1438 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1439 1440 /* End of file and Attributes should not have to be updated on close */ 1441 spin_unlock(&inode->i_lock); 1442 } 1443 1444 static int 1445 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1446 u64 persistent_fid, u64 volatile_fid, 1447 struct copychunk_ioctl *pcchunk) 1448 { 1449 int rc; 1450 unsigned int ret_data_len; 1451 struct resume_key_req *res_key; 1452 1453 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1454 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1455 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1456 1457 if (rc == -EOPNOTSUPP) { 1458 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1459 goto req_res_key_exit; 1460 } else if (rc) { 1461 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1462 goto req_res_key_exit; 1463 } 1464 if (ret_data_len < sizeof(struct resume_key_req)) { 1465 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1466 rc = -EINVAL; 1467 goto req_res_key_exit; 1468 } 1469 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1470 1471 req_res_key_exit: 1472 kfree(res_key); 1473 return rc; 1474 } 1475 1476 static int 1477 smb2_ioctl_query_info(const unsigned int xid, 1478 struct cifs_tcon *tcon, 1479 struct cifs_sb_info *cifs_sb, 1480 __le16 *path, int is_dir, 1481 unsigned long p) 1482 { 1483 struct smb2_compound_vars *vars; 1484 struct smb_rqst *rqst; 1485 struct kvec *rsp_iov; 1486 struct cifs_ses *ses = tcon->ses; 1487 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1488 char __user *arg = (char __user *)p; 1489 struct smb_query_info qi; 1490 struct smb_query_info __user *pqi; 1491 int rc = 0; 1492 int flags = CIFS_CP_CREATE_CLOSE_OP; 1493 struct smb2_query_info_rsp *qi_rsp = NULL; 1494 struct smb2_ioctl_rsp *io_rsp = NULL; 1495 void *buffer = NULL; 1496 int resp_buftype[3]; 1497 struct cifs_open_parms oparms; 1498 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1499 struct cifs_fid fid; 1500 unsigned int size[2]; 1501 void *data[2]; 1502 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1503 void (*free_req1_func)(struct smb_rqst *r); 1504 1505 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1506 if (vars == NULL) 1507 return -ENOMEM; 1508 rqst = &vars->rqst[0]; 1509 rsp_iov = &vars->rsp_iov[0]; 1510 1511 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1512 1513 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1514 rc = -EFAULT; 1515 goto free_vars; 1516 } 1517 if (qi.output_buffer_length > 1024) { 1518 rc = -EINVAL; 1519 goto free_vars; 1520 } 1521 1522 if (!ses || !server) { 1523 rc = -EIO; 1524 goto free_vars; 1525 } 1526 1527 if (smb3_encryption_required(tcon)) 1528 flags |= CIFS_TRANSFORM_REQ; 1529 1530 if (qi.output_buffer_length) { 1531 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1532 if (IS_ERR(buffer)) { 1533 rc = PTR_ERR(buffer); 1534 goto free_vars; 1535 } 1536 } 1537 1538 /* Open */ 1539 rqst[0].rq_iov = &vars->open_iov[0]; 1540 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1541 1542 oparms = (struct cifs_open_parms) { 1543 .tcon = tcon, 1544 .disposition = FILE_OPEN, 1545 .create_options = cifs_create_options(cifs_sb, create_options), 1546 .fid = &fid, 1547 }; 1548 1549 if (qi.flags & PASSTHRU_FSCTL) { 1550 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1551 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1552 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1553 break; 1554 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1555 oparms.desired_access = GENERIC_ALL; 1556 break; 1557 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1558 oparms.desired_access = GENERIC_READ; 1559 break; 1560 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1561 oparms.desired_access = GENERIC_WRITE; 1562 break; 1563 } 1564 } else if (qi.flags & PASSTHRU_SET_INFO) { 1565 oparms.desired_access = GENERIC_WRITE; 1566 } else { 1567 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1568 } 1569 1570 rc = SMB2_open_init(tcon, server, 1571 &rqst[0], &oplock, &oparms, path); 1572 if (rc) 1573 goto free_output_buffer; 1574 smb2_set_next_command(tcon, &rqst[0]); 1575 1576 /* Query */ 1577 if (qi.flags & PASSTHRU_FSCTL) { 1578 /* Can eventually relax perm check since server enforces too */ 1579 if (!capable(CAP_SYS_ADMIN)) { 1580 rc = -EPERM; 1581 goto free_open_req; 1582 } 1583 rqst[1].rq_iov = &vars->io_iov[0]; 1584 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1585 1586 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1587 qi.info_type, buffer, qi.output_buffer_length, 1588 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1589 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1590 free_req1_func = SMB2_ioctl_free; 1591 } else if (qi.flags == PASSTHRU_SET_INFO) { 1592 /* Can eventually relax perm check since server enforces too */ 1593 if (!capable(CAP_SYS_ADMIN)) { 1594 rc = -EPERM; 1595 goto free_open_req; 1596 } 1597 if (qi.output_buffer_length < 8) { 1598 rc = -EINVAL; 1599 goto free_open_req; 1600 } 1601 rqst[1].rq_iov = vars->si_iov; 1602 rqst[1].rq_nvec = 1; 1603 1604 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1605 size[0] = 8; 1606 data[0] = buffer; 1607 1608 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1609 current->tgid, FILE_END_OF_FILE_INFORMATION, 1610 SMB2_O_INFO_FILE, 0, data, size); 1611 free_req1_func = SMB2_set_info_free; 1612 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1613 rqst[1].rq_iov = &vars->qi_iov; 1614 rqst[1].rq_nvec = 1; 1615 1616 rc = SMB2_query_info_init(tcon, server, 1617 &rqst[1], COMPOUND_FID, 1618 COMPOUND_FID, qi.file_info_class, 1619 qi.info_type, qi.additional_information, 1620 qi.input_buffer_length, 1621 qi.output_buffer_length, buffer); 1622 free_req1_func = SMB2_query_info_free; 1623 } else { /* unknown flags */ 1624 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1625 qi.flags); 1626 rc = -EINVAL; 1627 } 1628 1629 if (rc) 1630 goto free_open_req; 1631 smb2_set_next_command(tcon, &rqst[1]); 1632 smb2_set_related(&rqst[1]); 1633 1634 /* Close */ 1635 rqst[2].rq_iov = &vars->close_iov; 1636 rqst[2].rq_nvec = 1; 1637 1638 rc = SMB2_close_init(tcon, server, 1639 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1640 if (rc) 1641 goto free_req_1; 1642 smb2_set_related(&rqst[2]); 1643 1644 rc = compound_send_recv(xid, ses, server, 1645 flags, 3, rqst, 1646 resp_buftype, rsp_iov); 1647 if (rc) 1648 goto out; 1649 1650 /* No need to bump num_remote_opens since handle immediately closed */ 1651 if (qi.flags & PASSTHRU_FSCTL) { 1652 pqi = (struct smb_query_info __user *)arg; 1653 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1654 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1655 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1656 if (qi.input_buffer_length > 0 && 1657 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1658 > rsp_iov[1].iov_len) { 1659 rc = -EFAULT; 1660 goto out; 1661 } 1662 1663 if (copy_to_user(&pqi->input_buffer_length, 1664 &qi.input_buffer_length, 1665 sizeof(qi.input_buffer_length))) { 1666 rc = -EFAULT; 1667 goto out; 1668 } 1669 1670 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1671 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1672 qi.input_buffer_length)) 1673 rc = -EFAULT; 1674 } else { 1675 pqi = (struct smb_query_info __user *)arg; 1676 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1677 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1678 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1679 if (copy_to_user(&pqi->input_buffer_length, 1680 &qi.input_buffer_length, 1681 sizeof(qi.input_buffer_length))) { 1682 rc = -EFAULT; 1683 goto out; 1684 } 1685 1686 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1687 qi.input_buffer_length)) 1688 rc = -EFAULT; 1689 } 1690 1691 out: 1692 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1693 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1694 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1695 SMB2_close_free(&rqst[2]); 1696 free_req_1: 1697 free_req1_func(&rqst[1]); 1698 free_open_req: 1699 SMB2_open_free(&rqst[0]); 1700 free_output_buffer: 1701 kfree(buffer); 1702 free_vars: 1703 kfree(vars); 1704 return rc; 1705 } 1706 1707 static ssize_t 1708 smb2_copychunk_range(const unsigned int xid, 1709 struct cifsFileInfo *srcfile, 1710 struct cifsFileInfo *trgtfile, u64 src_off, 1711 u64 len, u64 dest_off) 1712 { 1713 int rc; 1714 unsigned int ret_data_len; 1715 struct copychunk_ioctl *pcchunk; 1716 struct copychunk_ioctl_rsp *retbuf = NULL; 1717 struct cifs_tcon *tcon; 1718 int chunks_copied = 0; 1719 bool chunk_sizes_updated = false; 1720 ssize_t bytes_written, total_bytes_written = 0; 1721 1722 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1723 if (pcchunk == NULL) 1724 return -ENOMEM; 1725 1726 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1727 /* Request a key from the server to identify the source of the copy */ 1728 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1729 srcfile->fid.persistent_fid, 1730 srcfile->fid.volatile_fid, pcchunk); 1731 1732 /* Note: request_res_key sets res_key null only if rc !=0 */ 1733 if (rc) 1734 goto cchunk_out; 1735 1736 /* For now array only one chunk long, will make more flexible later */ 1737 pcchunk->ChunkCount = cpu_to_le32(1); 1738 pcchunk->Reserved = 0; 1739 pcchunk->Reserved2 = 0; 1740 1741 tcon = tlink_tcon(trgtfile->tlink); 1742 1743 while (len > 0) { 1744 pcchunk->SourceOffset = cpu_to_le64(src_off); 1745 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1746 pcchunk->Length = 1747 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1748 1749 /* Request server copy to target from src identified by key */ 1750 kfree(retbuf); 1751 retbuf = NULL; 1752 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1753 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1754 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1755 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1756 if (rc == 0) { 1757 if (ret_data_len != 1758 sizeof(struct copychunk_ioctl_rsp)) { 1759 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1760 rc = -EIO; 1761 goto cchunk_out; 1762 } 1763 if (retbuf->TotalBytesWritten == 0) { 1764 cifs_dbg(FYI, "no bytes copied\n"); 1765 rc = -EIO; 1766 goto cchunk_out; 1767 } 1768 /* 1769 * Check if server claimed to write more than we asked 1770 */ 1771 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1772 le32_to_cpu(pcchunk->Length)) { 1773 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1774 rc = -EIO; 1775 goto cchunk_out; 1776 } 1777 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1778 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1779 rc = -EIO; 1780 goto cchunk_out; 1781 } 1782 chunks_copied++; 1783 1784 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1785 src_off += bytes_written; 1786 dest_off += bytes_written; 1787 len -= bytes_written; 1788 total_bytes_written += bytes_written; 1789 1790 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1791 le32_to_cpu(retbuf->ChunksWritten), 1792 le32_to_cpu(retbuf->ChunkBytesWritten), 1793 bytes_written); 1794 } else if (rc == -EINVAL) { 1795 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1796 goto cchunk_out; 1797 1798 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1799 le32_to_cpu(retbuf->ChunksWritten), 1800 le32_to_cpu(retbuf->ChunkBytesWritten), 1801 le32_to_cpu(retbuf->TotalBytesWritten)); 1802 1803 /* 1804 * Check if this is the first request using these sizes, 1805 * (ie check if copy succeed once with original sizes 1806 * and check if the server gave us different sizes after 1807 * we already updated max sizes on previous request). 1808 * if not then why is the server returning an error now 1809 */ 1810 if ((chunks_copied != 0) || chunk_sizes_updated) 1811 goto cchunk_out; 1812 1813 /* Check that server is not asking us to grow size */ 1814 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1815 tcon->max_bytes_chunk) 1816 tcon->max_bytes_chunk = 1817 le32_to_cpu(retbuf->ChunkBytesWritten); 1818 else 1819 goto cchunk_out; /* server gave us bogus size */ 1820 1821 /* No need to change MaxChunks since already set to 1 */ 1822 chunk_sizes_updated = true; 1823 } else 1824 goto cchunk_out; 1825 } 1826 1827 cchunk_out: 1828 kfree(pcchunk); 1829 kfree(retbuf); 1830 if (rc) 1831 return rc; 1832 else 1833 return total_bytes_written; 1834 } 1835 1836 static int 1837 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1838 struct cifs_fid *fid) 1839 { 1840 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1841 } 1842 1843 static unsigned int 1844 smb2_read_data_offset(char *buf) 1845 { 1846 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1847 1848 return rsp->DataOffset; 1849 } 1850 1851 static unsigned int 1852 smb2_read_data_length(char *buf, bool in_remaining) 1853 { 1854 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1855 1856 if (in_remaining) 1857 return le32_to_cpu(rsp->DataRemaining); 1858 1859 return le32_to_cpu(rsp->DataLength); 1860 } 1861 1862 1863 static int 1864 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1865 struct cifs_io_parms *parms, unsigned int *bytes_read, 1866 char **buf, int *buf_type) 1867 { 1868 parms->persistent_fid = pfid->persistent_fid; 1869 parms->volatile_fid = pfid->volatile_fid; 1870 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1871 } 1872 1873 static int 1874 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1875 struct cifs_io_parms *parms, unsigned int *written, 1876 struct kvec *iov, unsigned long nr_segs) 1877 { 1878 1879 parms->persistent_fid = pfid->persistent_fid; 1880 parms->volatile_fid = pfid->volatile_fid; 1881 return SMB2_write(xid, parms, written, iov, nr_segs); 1882 } 1883 1884 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1885 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1886 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1887 { 1888 struct cifsInodeInfo *cifsi; 1889 int rc; 1890 1891 cifsi = CIFS_I(inode); 1892 1893 /* if file already sparse don't bother setting sparse again */ 1894 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1895 return true; /* already sparse */ 1896 1897 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1898 return true; /* already not sparse */ 1899 1900 /* 1901 * Can't check for sparse support on share the usual way via the 1902 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1903 * since Samba server doesn't set the flag on the share, yet 1904 * supports the set sparse FSCTL and returns sparse correctly 1905 * in the file attributes. If we fail setting sparse though we 1906 * mark that server does not support sparse files for this share 1907 * to avoid repeatedly sending the unsupported fsctl to server 1908 * if the file is repeatedly extended. 1909 */ 1910 if (tcon->broken_sparse_sup) 1911 return false; 1912 1913 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1914 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1915 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1916 if (rc) { 1917 tcon->broken_sparse_sup = true; 1918 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1919 return false; 1920 } 1921 1922 if (setsparse) 1923 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1924 else 1925 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1926 1927 return true; 1928 } 1929 1930 static int 1931 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1932 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1933 { 1934 struct inode *inode; 1935 1936 /* 1937 * If extending file more than one page make sparse. Many Linux fs 1938 * make files sparse by default when extending via ftruncate 1939 */ 1940 inode = d_inode(cfile->dentry); 1941 1942 if (!set_alloc && (size > inode->i_size + 8192)) { 1943 __u8 set_sparse = 1; 1944 1945 /* whether set sparse succeeds or not, extend the file */ 1946 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1947 } 1948 1949 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1950 cfile->fid.volatile_fid, cfile->pid, size); 1951 } 1952 1953 static int 1954 smb2_duplicate_extents(const unsigned int xid, 1955 struct cifsFileInfo *srcfile, 1956 struct cifsFileInfo *trgtfile, u64 src_off, 1957 u64 len, u64 dest_off) 1958 { 1959 int rc; 1960 unsigned int ret_data_len; 1961 struct inode *inode; 1962 struct duplicate_extents_to_file dup_ext_buf; 1963 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 1964 1965 /* server fileays advertise duplicate extent support with this flag */ 1966 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 1967 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 1968 return -EOPNOTSUPP; 1969 1970 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 1971 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 1972 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 1973 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 1974 dup_ext_buf.ByteCount = cpu_to_le64(len); 1975 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 1976 src_off, dest_off, len); 1977 1978 inode = d_inode(trgtfile->dentry); 1979 if (inode->i_size < dest_off + len) { 1980 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 1981 if (rc) 1982 goto duplicate_extents_out; 1983 1984 /* 1985 * Although also could set plausible allocation size (i_blocks) 1986 * here in addition to setting the file size, in reflink 1987 * it is likely that the target file is sparse. Its allocation 1988 * size will be queried on next revalidate, but it is important 1989 * to make sure that file's cached size is updated immediately 1990 */ 1991 cifs_setsize(inode, dest_off + len); 1992 } 1993 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1994 trgtfile->fid.volatile_fid, 1995 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 1996 (char *)&dup_ext_buf, 1997 sizeof(struct duplicate_extents_to_file), 1998 CIFSMaxBufSize, NULL, 1999 &ret_data_len); 2000 2001 if (ret_data_len > 0) 2002 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2003 2004 duplicate_extents_out: 2005 return rc; 2006 } 2007 2008 static int 2009 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2010 struct cifsFileInfo *cfile) 2011 { 2012 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2013 cfile->fid.volatile_fid); 2014 } 2015 2016 static int 2017 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2018 struct cifsFileInfo *cfile) 2019 { 2020 struct fsctl_set_integrity_information_req integr_info; 2021 unsigned int ret_data_len; 2022 2023 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2024 integr_info.Flags = 0; 2025 integr_info.Reserved = 0; 2026 2027 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2028 cfile->fid.volatile_fid, 2029 FSCTL_SET_INTEGRITY_INFORMATION, 2030 (char *)&integr_info, 2031 sizeof(struct fsctl_set_integrity_information_req), 2032 CIFSMaxBufSize, NULL, 2033 &ret_data_len); 2034 2035 } 2036 2037 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2038 #define GMT_TOKEN_SIZE 50 2039 2040 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2041 2042 /* 2043 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2044 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2045 */ 2046 static int 2047 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2048 struct cifsFileInfo *cfile, void __user *ioc_buf) 2049 { 2050 char *retbuf = NULL; 2051 unsigned int ret_data_len = 0; 2052 int rc; 2053 u32 max_response_size; 2054 struct smb_snapshot_array snapshot_in; 2055 2056 /* 2057 * On the first query to enumerate the list of snapshots available 2058 * for this volume the buffer begins with 0 (number of snapshots 2059 * which can be returned is zero since at that point we do not know 2060 * how big the buffer needs to be). On the second query, 2061 * it (ret_data_len) is set to number of snapshots so we can 2062 * know to set the maximum response size larger (see below). 2063 */ 2064 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2065 return -EFAULT; 2066 2067 /* 2068 * Note that for snapshot queries that servers like Azure expect that 2069 * the first query be minimal size (and just used to get the number/size 2070 * of previous versions) so response size must be specified as EXACTLY 2071 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2072 * of eight bytes. 2073 */ 2074 if (ret_data_len == 0) 2075 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2076 else 2077 max_response_size = CIFSMaxBufSize; 2078 2079 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2080 cfile->fid.volatile_fid, 2081 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2082 NULL, 0 /* no input data */, max_response_size, 2083 (char **)&retbuf, 2084 &ret_data_len); 2085 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2086 rc, ret_data_len); 2087 if (rc) 2088 return rc; 2089 2090 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2091 /* Fixup buffer */ 2092 if (copy_from_user(&snapshot_in, ioc_buf, 2093 sizeof(struct smb_snapshot_array))) { 2094 rc = -EFAULT; 2095 kfree(retbuf); 2096 return rc; 2097 } 2098 2099 /* 2100 * Check for min size, ie not large enough to fit even one GMT 2101 * token (snapshot). On the first ioctl some users may pass in 2102 * smaller size (or zero) to simply get the size of the array 2103 * so the user space caller can allocate sufficient memory 2104 * and retry the ioctl again with larger array size sufficient 2105 * to hold all of the snapshot GMT tokens on the second try. 2106 */ 2107 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2108 ret_data_len = sizeof(struct smb_snapshot_array); 2109 2110 /* 2111 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2112 * the snapshot array (of 50 byte GMT tokens) each 2113 * representing an available previous version of the data 2114 */ 2115 if (ret_data_len > (snapshot_in.snapshot_array_size + 2116 sizeof(struct smb_snapshot_array))) 2117 ret_data_len = snapshot_in.snapshot_array_size + 2118 sizeof(struct smb_snapshot_array); 2119 2120 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2121 rc = -EFAULT; 2122 } 2123 2124 kfree(retbuf); 2125 return rc; 2126 } 2127 2128 2129 2130 static int 2131 smb3_notify(const unsigned int xid, struct file *pfile, 2132 void __user *ioc_buf, bool return_changes) 2133 { 2134 struct smb3_notify_info notify; 2135 struct smb3_notify_info __user *pnotify_buf; 2136 struct dentry *dentry = pfile->f_path.dentry; 2137 struct inode *inode = file_inode(pfile); 2138 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2139 struct cifs_open_parms oparms; 2140 struct cifs_fid fid; 2141 struct cifs_tcon *tcon; 2142 const unsigned char *path; 2143 char *returned_ioctl_info = NULL; 2144 void *page = alloc_dentry_path(); 2145 __le16 *utf16_path = NULL; 2146 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2147 int rc = 0; 2148 __u32 ret_len = 0; 2149 2150 path = build_path_from_dentry(dentry, page); 2151 if (IS_ERR(path)) { 2152 rc = PTR_ERR(path); 2153 goto notify_exit; 2154 } 2155 2156 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2157 if (utf16_path == NULL) { 2158 rc = -ENOMEM; 2159 goto notify_exit; 2160 } 2161 2162 if (return_changes) { 2163 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2164 rc = -EFAULT; 2165 goto notify_exit; 2166 } 2167 } else { 2168 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2169 rc = -EFAULT; 2170 goto notify_exit; 2171 } 2172 notify.data_len = 0; 2173 } 2174 2175 tcon = cifs_sb_master_tcon(cifs_sb); 2176 oparms = (struct cifs_open_parms) { 2177 .tcon = tcon, 2178 .path = path, 2179 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2180 .disposition = FILE_OPEN, 2181 .create_options = cifs_create_options(cifs_sb, 0), 2182 .fid = &fid, 2183 }; 2184 2185 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2186 NULL); 2187 if (rc) 2188 goto notify_exit; 2189 2190 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2191 notify.watch_tree, notify.completion_filter, 2192 notify.data_len, &returned_ioctl_info, &ret_len); 2193 2194 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2195 2196 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2197 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2198 if (ret_len > notify.data_len) 2199 ret_len = notify.data_len; 2200 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2201 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2202 rc = -EFAULT; 2203 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2204 rc = -EFAULT; 2205 } 2206 kfree(returned_ioctl_info); 2207 notify_exit: 2208 free_dentry_path(page); 2209 kfree(utf16_path); 2210 return rc; 2211 } 2212 2213 static int 2214 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2215 const char *path, struct cifs_sb_info *cifs_sb, 2216 struct cifs_fid *fid, __u16 search_flags, 2217 struct cifs_search_info *srch_inf) 2218 { 2219 __le16 *utf16_path; 2220 struct smb_rqst rqst[2]; 2221 struct kvec rsp_iov[2]; 2222 int resp_buftype[2]; 2223 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2224 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2225 int rc, flags = 0; 2226 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2227 struct cifs_open_parms oparms; 2228 struct smb2_query_directory_rsp *qd_rsp = NULL; 2229 struct smb2_create_rsp *op_rsp = NULL; 2230 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2231 int retry_count = 0; 2232 2233 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2234 if (!utf16_path) 2235 return -ENOMEM; 2236 2237 if (smb3_encryption_required(tcon)) 2238 flags |= CIFS_TRANSFORM_REQ; 2239 2240 memset(rqst, 0, sizeof(rqst)); 2241 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2242 memset(rsp_iov, 0, sizeof(rsp_iov)); 2243 2244 /* Open */ 2245 memset(&open_iov, 0, sizeof(open_iov)); 2246 rqst[0].rq_iov = open_iov; 2247 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2248 2249 oparms = (struct cifs_open_parms) { 2250 .tcon = tcon, 2251 .path = path, 2252 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2253 .disposition = FILE_OPEN, 2254 .create_options = cifs_create_options(cifs_sb, 0), 2255 .fid = fid, 2256 }; 2257 2258 rc = SMB2_open_init(tcon, server, 2259 &rqst[0], &oplock, &oparms, utf16_path); 2260 if (rc) 2261 goto qdf_free; 2262 smb2_set_next_command(tcon, &rqst[0]); 2263 2264 /* Query directory */ 2265 srch_inf->entries_in_buffer = 0; 2266 srch_inf->index_of_last_entry = 2; 2267 2268 memset(&qd_iov, 0, sizeof(qd_iov)); 2269 rqst[1].rq_iov = qd_iov; 2270 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2271 2272 rc = SMB2_query_directory_init(xid, tcon, server, 2273 &rqst[1], 2274 COMPOUND_FID, COMPOUND_FID, 2275 0, srch_inf->info_level); 2276 if (rc) 2277 goto qdf_free; 2278 2279 smb2_set_related(&rqst[1]); 2280 2281 again: 2282 rc = compound_send_recv(xid, tcon->ses, server, 2283 flags, 2, rqst, 2284 resp_buftype, rsp_iov); 2285 2286 if (rc == -EAGAIN && retry_count++ < 10) 2287 goto again; 2288 2289 /* If the open failed there is nothing to do */ 2290 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2291 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2292 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2293 goto qdf_free; 2294 } 2295 fid->persistent_fid = op_rsp->PersistentFileId; 2296 fid->volatile_fid = op_rsp->VolatileFileId; 2297 2298 /* Anything else than ENODATA means a genuine error */ 2299 if (rc && rc != -ENODATA) { 2300 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2301 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2302 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2303 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2304 goto qdf_free; 2305 } 2306 2307 atomic_inc(&tcon->num_remote_opens); 2308 2309 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2310 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2311 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2312 tcon->tid, tcon->ses->Suid, 0, 0); 2313 srch_inf->endOfSearch = true; 2314 rc = 0; 2315 goto qdf_free; 2316 } 2317 2318 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2319 srch_inf); 2320 if (rc) { 2321 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2322 tcon->ses->Suid, 0, 0, rc); 2323 goto qdf_free; 2324 } 2325 resp_buftype[1] = CIFS_NO_BUFFER; 2326 2327 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2328 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2329 2330 qdf_free: 2331 kfree(utf16_path); 2332 SMB2_open_free(&rqst[0]); 2333 SMB2_query_directory_free(&rqst[1]); 2334 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2335 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2336 return rc; 2337 } 2338 2339 static int 2340 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2341 struct cifs_fid *fid, __u16 search_flags, 2342 struct cifs_search_info *srch_inf) 2343 { 2344 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2345 fid->volatile_fid, 0, srch_inf); 2346 } 2347 2348 static int 2349 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2350 struct cifs_fid *fid) 2351 { 2352 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2353 } 2354 2355 /* 2356 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2357 * the number of credits and return true. Otherwise - return false. 2358 */ 2359 static bool 2360 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2361 { 2362 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2363 int scredits, in_flight; 2364 2365 if (shdr->Status != STATUS_PENDING) 2366 return false; 2367 2368 if (shdr->CreditRequest) { 2369 spin_lock(&server->req_lock); 2370 server->credits += le16_to_cpu(shdr->CreditRequest); 2371 scredits = server->credits; 2372 in_flight = server->in_flight; 2373 spin_unlock(&server->req_lock); 2374 wake_up(&server->request_q); 2375 2376 trace_smb3_pend_credits(server->CurrentMid, 2377 server->conn_id, server->hostname, scredits, 2378 le16_to_cpu(shdr->CreditRequest), in_flight); 2379 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2380 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2381 } 2382 2383 return true; 2384 } 2385 2386 static bool 2387 smb2_is_session_expired(char *buf) 2388 { 2389 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2390 2391 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2392 shdr->Status != STATUS_USER_SESSION_DELETED) 2393 return false; 2394 2395 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2396 le64_to_cpu(shdr->SessionId), 2397 le16_to_cpu(shdr->Command), 2398 le64_to_cpu(shdr->MessageId)); 2399 cifs_dbg(FYI, "Session expired or deleted\n"); 2400 2401 return true; 2402 } 2403 2404 static bool 2405 smb2_is_status_io_timeout(char *buf) 2406 { 2407 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2408 2409 if (shdr->Status == STATUS_IO_TIMEOUT) 2410 return true; 2411 else 2412 return false; 2413 } 2414 2415 static bool 2416 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2417 { 2418 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2419 struct TCP_Server_Info *pserver; 2420 struct cifs_ses *ses; 2421 struct cifs_tcon *tcon; 2422 2423 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2424 return false; 2425 2426 /* If server is a channel, select the primary channel */ 2427 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2428 2429 spin_lock(&cifs_tcp_ses_lock); 2430 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2431 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2432 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2433 spin_lock(&tcon->tc_lock); 2434 tcon->need_reconnect = true; 2435 spin_unlock(&tcon->tc_lock); 2436 spin_unlock(&cifs_tcp_ses_lock); 2437 pr_warn_once("Server share %s deleted.\n", 2438 tcon->tree_name); 2439 return true; 2440 } 2441 } 2442 } 2443 spin_unlock(&cifs_tcp_ses_lock); 2444 2445 return false; 2446 } 2447 2448 static int 2449 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2450 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2451 { 2452 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2453 return SMB2_lease_break(0, tcon, cinode->lease_key, 2454 smb2_get_lease_state(cinode)); 2455 2456 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2457 CIFS_CACHE_READ(cinode) ? 1 : 0); 2458 } 2459 2460 void 2461 smb2_set_related(struct smb_rqst *rqst) 2462 { 2463 struct smb2_hdr *shdr; 2464 2465 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2466 if (shdr == NULL) { 2467 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2468 return; 2469 } 2470 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2471 } 2472 2473 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2474 2475 void 2476 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2477 { 2478 struct smb2_hdr *shdr; 2479 struct cifs_ses *ses = tcon->ses; 2480 struct TCP_Server_Info *server = ses->server; 2481 unsigned long len = smb_rqst_len(server, rqst); 2482 int i, num_padding; 2483 2484 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2485 if (shdr == NULL) { 2486 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2487 return; 2488 } 2489 2490 /* SMB headers in a compound are 8 byte aligned. */ 2491 2492 /* No padding needed */ 2493 if (!(len & 7)) 2494 goto finished; 2495 2496 num_padding = 8 - (len & 7); 2497 if (!smb3_encryption_required(tcon)) { 2498 /* 2499 * If we do not have encryption then we can just add an extra 2500 * iov for the padding. 2501 */ 2502 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2503 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2504 rqst->rq_nvec++; 2505 len += num_padding; 2506 } else { 2507 /* 2508 * We can not add a small padding iov for the encryption case 2509 * because the encryption framework can not handle the padding 2510 * iovs. 2511 * We have to flatten this into a single buffer and add 2512 * the padding to it. 2513 */ 2514 for (i = 1; i < rqst->rq_nvec; i++) { 2515 memcpy(rqst->rq_iov[0].iov_base + 2516 rqst->rq_iov[0].iov_len, 2517 rqst->rq_iov[i].iov_base, 2518 rqst->rq_iov[i].iov_len); 2519 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2520 } 2521 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2522 0, num_padding); 2523 rqst->rq_iov[0].iov_len += num_padding; 2524 len += num_padding; 2525 rqst->rq_nvec = 1; 2526 } 2527 2528 finished: 2529 shdr->NextCommand = cpu_to_le32(len); 2530 } 2531 2532 /* 2533 * Passes the query info response back to the caller on success. 2534 * Caller need to free this with free_rsp_buf(). 2535 */ 2536 int 2537 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2538 const char *path, u32 desired_access, 2539 u32 class, u32 type, u32 output_len, 2540 struct kvec *rsp, int *buftype, 2541 struct cifs_sb_info *cifs_sb) 2542 { 2543 struct smb2_compound_vars *vars; 2544 struct cifs_ses *ses = tcon->ses; 2545 struct TCP_Server_Info *server = cifs_pick_channel(ses); 2546 int flags = CIFS_CP_CREATE_CLOSE_OP; 2547 struct smb_rqst *rqst; 2548 int resp_buftype[3]; 2549 struct kvec *rsp_iov; 2550 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2551 struct cifs_open_parms oparms; 2552 struct cifs_fid fid; 2553 int rc; 2554 __le16 *utf16_path; 2555 struct cached_fid *cfid = NULL; 2556 2557 if (!path) 2558 path = ""; 2559 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2560 if (!utf16_path) 2561 return -ENOMEM; 2562 2563 if (smb3_encryption_required(tcon)) 2564 flags |= CIFS_TRANSFORM_REQ; 2565 2566 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2567 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2568 if (!vars) { 2569 rc = -ENOMEM; 2570 goto out_free_path; 2571 } 2572 rqst = vars->rqst; 2573 rsp_iov = vars->rsp_iov; 2574 2575 /* 2576 * We can only call this for things we know are directories. 2577 */ 2578 if (!strcmp(path, "")) 2579 open_cached_dir(xid, tcon, path, cifs_sb, false, 2580 &cfid); /* cfid null if open dir failed */ 2581 2582 rqst[0].rq_iov = vars->open_iov; 2583 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2584 2585 oparms = (struct cifs_open_parms) { 2586 .tcon = tcon, 2587 .path = path, 2588 .desired_access = desired_access, 2589 .disposition = FILE_OPEN, 2590 .create_options = cifs_create_options(cifs_sb, 0), 2591 .fid = &fid, 2592 }; 2593 2594 rc = SMB2_open_init(tcon, server, 2595 &rqst[0], &oplock, &oparms, utf16_path); 2596 if (rc) 2597 goto qic_exit; 2598 smb2_set_next_command(tcon, &rqst[0]); 2599 2600 rqst[1].rq_iov = &vars->qi_iov; 2601 rqst[1].rq_nvec = 1; 2602 2603 if (cfid) { 2604 rc = SMB2_query_info_init(tcon, server, 2605 &rqst[1], 2606 cfid->fid.persistent_fid, 2607 cfid->fid.volatile_fid, 2608 class, type, 0, 2609 output_len, 0, 2610 NULL); 2611 } else { 2612 rc = SMB2_query_info_init(tcon, server, 2613 &rqst[1], 2614 COMPOUND_FID, 2615 COMPOUND_FID, 2616 class, type, 0, 2617 output_len, 0, 2618 NULL); 2619 } 2620 if (rc) 2621 goto qic_exit; 2622 if (!cfid) { 2623 smb2_set_next_command(tcon, &rqst[1]); 2624 smb2_set_related(&rqst[1]); 2625 } 2626 2627 rqst[2].rq_iov = &vars->close_iov; 2628 rqst[2].rq_nvec = 1; 2629 2630 rc = SMB2_close_init(tcon, server, 2631 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2632 if (rc) 2633 goto qic_exit; 2634 smb2_set_related(&rqst[2]); 2635 2636 if (cfid) { 2637 rc = compound_send_recv(xid, ses, server, 2638 flags, 1, &rqst[1], 2639 &resp_buftype[1], &rsp_iov[1]); 2640 } else { 2641 rc = compound_send_recv(xid, ses, server, 2642 flags, 3, rqst, 2643 resp_buftype, rsp_iov); 2644 } 2645 if (rc) { 2646 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2647 if (rc == -EREMCHG) { 2648 tcon->need_reconnect = true; 2649 pr_warn_once("server share %s deleted\n", 2650 tcon->tree_name); 2651 } 2652 goto qic_exit; 2653 } 2654 *rsp = rsp_iov[1]; 2655 *buftype = resp_buftype[1]; 2656 2657 qic_exit: 2658 SMB2_open_free(&rqst[0]); 2659 SMB2_query_info_free(&rqst[1]); 2660 SMB2_close_free(&rqst[2]); 2661 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2662 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2663 if (cfid) 2664 close_cached_dir(cfid); 2665 kfree(vars); 2666 out_free_path: 2667 kfree(utf16_path); 2668 return rc; 2669 } 2670 2671 static int 2672 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2673 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2674 { 2675 struct smb2_query_info_rsp *rsp; 2676 struct smb2_fs_full_size_info *info = NULL; 2677 struct kvec rsp_iov = {NULL, 0}; 2678 int buftype = CIFS_NO_BUFFER; 2679 int rc; 2680 2681 2682 rc = smb2_query_info_compound(xid, tcon, "", 2683 FILE_READ_ATTRIBUTES, 2684 FS_FULL_SIZE_INFORMATION, 2685 SMB2_O_INFO_FILESYSTEM, 2686 sizeof(struct smb2_fs_full_size_info), 2687 &rsp_iov, &buftype, cifs_sb); 2688 if (rc) 2689 goto qfs_exit; 2690 2691 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2692 buf->f_type = SMB2_SUPER_MAGIC; 2693 info = (struct smb2_fs_full_size_info *)( 2694 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2695 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2696 le32_to_cpu(rsp->OutputBufferLength), 2697 &rsp_iov, 2698 sizeof(struct smb2_fs_full_size_info)); 2699 if (!rc) 2700 smb2_copy_fs_info_to_kstatfs(info, buf); 2701 2702 qfs_exit: 2703 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2704 free_rsp_buf(buftype, rsp_iov.iov_base); 2705 return rc; 2706 } 2707 2708 static int 2709 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2710 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2711 { 2712 int rc; 2713 __le16 srch_path = 0; /* Null - open root of share */ 2714 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2715 struct cifs_open_parms oparms; 2716 struct cifs_fid fid; 2717 2718 if (!tcon->posix_extensions) 2719 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2720 2721 oparms = (struct cifs_open_parms) { 2722 .tcon = tcon, 2723 .path = "", 2724 .desired_access = FILE_READ_ATTRIBUTES, 2725 .disposition = FILE_OPEN, 2726 .create_options = cifs_create_options(cifs_sb, 0), 2727 .fid = &fid, 2728 }; 2729 2730 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2731 NULL, NULL); 2732 if (rc) 2733 return rc; 2734 2735 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2736 fid.volatile_fid, buf); 2737 buf->f_type = SMB2_SUPER_MAGIC; 2738 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2739 return rc; 2740 } 2741 2742 static bool 2743 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2744 { 2745 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2746 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2747 } 2748 2749 static int 2750 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2751 __u64 length, __u32 type, int lock, int unlock, bool wait) 2752 { 2753 if (unlock && !lock) 2754 type = SMB2_LOCKFLAG_UNLOCK; 2755 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2756 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2757 current->tgid, length, offset, type, wait); 2758 } 2759 2760 static void 2761 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2762 { 2763 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2764 } 2765 2766 static void 2767 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2768 { 2769 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2770 } 2771 2772 static void 2773 smb2_new_lease_key(struct cifs_fid *fid) 2774 { 2775 generate_random_uuid(fid->lease_key); 2776 } 2777 2778 static int 2779 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2780 const char *search_name, 2781 struct dfs_info3_param **target_nodes, 2782 unsigned int *num_of_nodes, 2783 const struct nls_table *nls_codepage, int remap) 2784 { 2785 int rc; 2786 __le16 *utf16_path = NULL; 2787 int utf16_path_len = 0; 2788 struct cifs_tcon *tcon; 2789 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2790 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2791 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2792 int retry_count = 0; 2793 2794 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2795 2796 /* 2797 * Try to use the IPC tcon, otherwise just use any 2798 */ 2799 tcon = ses->tcon_ipc; 2800 if (tcon == NULL) { 2801 spin_lock(&cifs_tcp_ses_lock); 2802 tcon = list_first_entry_or_null(&ses->tcon_list, 2803 struct cifs_tcon, 2804 tcon_list); 2805 if (tcon) 2806 tcon->tc_count++; 2807 spin_unlock(&cifs_tcp_ses_lock); 2808 } 2809 2810 if (tcon == NULL) { 2811 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2812 ses); 2813 rc = -ENOTCONN; 2814 goto out; 2815 } 2816 2817 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2818 &utf16_path_len, 2819 nls_codepage, remap); 2820 if (!utf16_path) { 2821 rc = -ENOMEM; 2822 goto out; 2823 } 2824 2825 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2826 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2827 if (!dfs_req) { 2828 rc = -ENOMEM; 2829 goto out; 2830 } 2831 2832 /* Highest DFS referral version understood */ 2833 dfs_req->MaxReferralLevel = DFS_VERSION; 2834 2835 /* Path to resolve in an UTF-16 null-terminated string */ 2836 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2837 2838 do { 2839 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2840 FSCTL_DFS_GET_REFERRALS, 2841 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2842 (char **)&dfs_rsp, &dfs_rsp_size); 2843 if (!is_retryable_error(rc)) 2844 break; 2845 usleep_range(512, 2048); 2846 } while (++retry_count < 5); 2847 2848 if (!rc && !dfs_rsp) 2849 rc = -EIO; 2850 if (rc) { 2851 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2852 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2853 goto out; 2854 } 2855 2856 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2857 num_of_nodes, target_nodes, 2858 nls_codepage, remap, search_name, 2859 true /* is_unicode */); 2860 if (rc) { 2861 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2862 goto out; 2863 } 2864 2865 out: 2866 if (tcon && !tcon->ipc) { 2867 /* ipc tcons are not refcounted */ 2868 spin_lock(&cifs_tcp_ses_lock); 2869 tcon->tc_count--; 2870 /* tc_count can never go negative */ 2871 WARN_ON(tcon->tc_count < 0); 2872 spin_unlock(&cifs_tcp_ses_lock); 2873 } 2874 kfree(utf16_path); 2875 kfree(dfs_req); 2876 kfree(dfs_rsp); 2877 return rc; 2878 } 2879 2880 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2881 static int parse_reparse_posix(struct reparse_posix_data *buf, 2882 struct cifs_sb_info *cifs_sb, 2883 struct cifs_open_info_data *data) 2884 { 2885 unsigned int len; 2886 u64 type; 2887 2888 switch ((type = le64_to_cpu(buf->InodeType))) { 2889 case NFS_SPECFILE_LNK: 2890 len = le16_to_cpu(buf->ReparseDataLength); 2891 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer, 2892 len, true, 2893 cifs_sb->local_nls); 2894 if (!data->symlink_target) 2895 return -ENOMEM; 2896 convert_delimiter(data->symlink_target, '/'); 2897 cifs_dbg(FYI, "%s: target path: %s\n", 2898 __func__, data->symlink_target); 2899 break; 2900 case NFS_SPECFILE_CHR: 2901 case NFS_SPECFILE_BLK: 2902 case NFS_SPECFILE_FIFO: 2903 case NFS_SPECFILE_SOCK: 2904 break; 2905 default: 2906 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n", 2907 __func__, type); 2908 return -EOPNOTSUPP; 2909 } 2910 return 0; 2911 } 2912 2913 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym, 2914 u32 plen, bool unicode, 2915 struct cifs_sb_info *cifs_sb, 2916 struct cifs_open_info_data *data) 2917 { 2918 unsigned int len; 2919 unsigned int offs; 2920 2921 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 2922 2923 offs = le16_to_cpu(sym->SubstituteNameOffset); 2924 len = le16_to_cpu(sym->SubstituteNameLength); 2925 if (offs + 20 > plen || offs + len + 20 > plen) { 2926 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 2927 return -EIO; 2928 } 2929 2930 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs, 2931 len, unicode, 2932 cifs_sb->local_nls); 2933 if (!data->symlink_target) 2934 return -ENOMEM; 2935 2936 convert_delimiter(data->symlink_target, '/'); 2937 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target); 2938 2939 return 0; 2940 } 2941 2942 int parse_reparse_point(struct reparse_data_buffer *buf, 2943 u32 plen, struct cifs_sb_info *cifs_sb, 2944 bool unicode, struct cifs_open_info_data *data) 2945 { 2946 data->reparse.buf = buf; 2947 2948 /* See MS-FSCC 2.1.2 */ 2949 switch (le32_to_cpu(buf->ReparseTag)) { 2950 case IO_REPARSE_TAG_NFS: 2951 return parse_reparse_posix((struct reparse_posix_data *)buf, 2952 cifs_sb, data); 2953 case IO_REPARSE_TAG_SYMLINK: 2954 return parse_reparse_symlink( 2955 (struct reparse_symlink_data_buffer *)buf, 2956 plen, unicode, cifs_sb, data); 2957 case IO_REPARSE_TAG_LX_SYMLINK: 2958 case IO_REPARSE_TAG_AF_UNIX: 2959 case IO_REPARSE_TAG_LX_FIFO: 2960 case IO_REPARSE_TAG_LX_CHR: 2961 case IO_REPARSE_TAG_LX_BLK: 2962 return 0; 2963 default: 2964 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n", 2965 __func__, le32_to_cpu(buf->ReparseTag)); 2966 return -EOPNOTSUPP; 2967 } 2968 } 2969 2970 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, 2971 struct kvec *rsp_iov, 2972 struct cifs_open_info_data *data) 2973 { 2974 struct reparse_data_buffer *buf; 2975 struct smb2_ioctl_rsp *io = rsp_iov->iov_base; 2976 u32 plen = le32_to_cpu(io->OutputCount); 2977 2978 buf = (struct reparse_data_buffer *)((u8 *)io + 2979 le32_to_cpu(io->OutputOffset)); 2980 return parse_reparse_point(buf, plen, cifs_sb, true, data); 2981 } 2982 2983 static struct cifs_ntsd * 2984 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 2985 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 2986 { 2987 struct cifs_ntsd *pntsd = NULL; 2988 unsigned int xid; 2989 int rc = -EOPNOTSUPP; 2990 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 2991 2992 if (IS_ERR(tlink)) 2993 return ERR_CAST(tlink); 2994 2995 xid = get_xid(); 2996 cifs_dbg(FYI, "trying to get acl\n"); 2997 2998 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 2999 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3000 info); 3001 free_xid(xid); 3002 3003 cifs_put_tlink(tlink); 3004 3005 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3006 if (rc) 3007 return ERR_PTR(rc); 3008 return pntsd; 3009 3010 } 3011 3012 static struct cifs_ntsd * 3013 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3014 const char *path, u32 *pacllen, u32 info) 3015 { 3016 struct cifs_ntsd *pntsd = NULL; 3017 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3018 unsigned int xid; 3019 int rc; 3020 struct cifs_tcon *tcon; 3021 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3022 struct cifs_fid fid; 3023 struct cifs_open_parms oparms; 3024 __le16 *utf16_path; 3025 3026 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3027 if (IS_ERR(tlink)) 3028 return ERR_CAST(tlink); 3029 3030 tcon = tlink_tcon(tlink); 3031 xid = get_xid(); 3032 3033 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3034 if (!utf16_path) { 3035 rc = -ENOMEM; 3036 free_xid(xid); 3037 return ERR_PTR(rc); 3038 } 3039 3040 oparms = (struct cifs_open_parms) { 3041 .tcon = tcon, 3042 .path = path, 3043 .desired_access = READ_CONTROL, 3044 .disposition = FILE_OPEN, 3045 /* 3046 * When querying an ACL, even if the file is a symlink 3047 * we want to open the source not the target, and so 3048 * the protocol requires that the client specify this 3049 * flag when opening a reparse point 3050 */ 3051 .create_options = cifs_create_options(cifs_sb, 0) | 3052 OPEN_REPARSE_POINT, 3053 .fid = &fid, 3054 }; 3055 3056 if (info & SACL_SECINFO) 3057 oparms.desired_access |= SYSTEM_SECURITY; 3058 3059 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3060 NULL); 3061 kfree(utf16_path); 3062 if (!rc) { 3063 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3064 fid.volatile_fid, (void **)&pntsd, pacllen, 3065 info); 3066 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3067 } 3068 3069 cifs_put_tlink(tlink); 3070 free_xid(xid); 3071 3072 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3073 if (rc) 3074 return ERR_PTR(rc); 3075 return pntsd; 3076 } 3077 3078 static int 3079 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3080 struct inode *inode, const char *path, int aclflag) 3081 { 3082 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3083 unsigned int xid; 3084 int rc, access_flags = 0; 3085 struct cifs_tcon *tcon; 3086 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3087 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3088 struct cifs_fid fid; 3089 struct cifs_open_parms oparms; 3090 __le16 *utf16_path; 3091 3092 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3093 if (IS_ERR(tlink)) 3094 return PTR_ERR(tlink); 3095 3096 tcon = tlink_tcon(tlink); 3097 xid = get_xid(); 3098 3099 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3100 access_flags |= WRITE_OWNER; 3101 if (aclflag & CIFS_ACL_SACL) 3102 access_flags |= SYSTEM_SECURITY; 3103 if (aclflag & CIFS_ACL_DACL) 3104 access_flags |= WRITE_DAC; 3105 3106 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3107 if (!utf16_path) { 3108 rc = -ENOMEM; 3109 free_xid(xid); 3110 return rc; 3111 } 3112 3113 oparms = (struct cifs_open_parms) { 3114 .tcon = tcon, 3115 .desired_access = access_flags, 3116 .create_options = cifs_create_options(cifs_sb, 0), 3117 .disposition = FILE_OPEN, 3118 .path = path, 3119 .fid = &fid, 3120 }; 3121 3122 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3123 NULL, NULL); 3124 kfree(utf16_path); 3125 if (!rc) { 3126 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3127 fid.volatile_fid, pnntsd, acllen, aclflag); 3128 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3129 } 3130 3131 cifs_put_tlink(tlink); 3132 free_xid(xid); 3133 return rc; 3134 } 3135 3136 /* Retrieve an ACL from the server */ 3137 static struct cifs_ntsd * 3138 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3139 struct inode *inode, const char *path, 3140 u32 *pacllen, u32 info) 3141 { 3142 struct cifs_ntsd *pntsd = NULL; 3143 struct cifsFileInfo *open_file = NULL; 3144 3145 if (inode && !(info & SACL_SECINFO)) 3146 open_file = find_readable_file(CIFS_I(inode), true); 3147 if (!open_file || (info & SACL_SECINFO)) 3148 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3149 3150 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3151 cifsFileInfo_put(open_file); 3152 return pntsd; 3153 } 3154 3155 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3156 loff_t offset, loff_t len, unsigned int xid) 3157 { 3158 struct cifsFileInfo *cfile = file->private_data; 3159 struct file_zero_data_information fsctl_buf; 3160 3161 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3162 3163 fsctl_buf.FileOffset = cpu_to_le64(offset); 3164 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3165 3166 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3167 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3168 (char *)&fsctl_buf, 3169 sizeof(struct file_zero_data_information), 3170 0, NULL, NULL); 3171 } 3172 3173 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3174 loff_t offset, loff_t len, bool keep_size) 3175 { 3176 struct cifs_ses *ses = tcon->ses; 3177 struct inode *inode = file_inode(file); 3178 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3179 struct cifsFileInfo *cfile = file->private_data; 3180 unsigned long long new_size; 3181 long rc; 3182 unsigned int xid; 3183 3184 xid = get_xid(); 3185 3186 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3187 ses->Suid, offset, len); 3188 3189 inode_lock(inode); 3190 filemap_invalidate_lock(inode->i_mapping); 3191 3192 /* 3193 * We zero the range through ioctl, so we need remove the page caches 3194 * first, otherwise the data may be inconsistent with the server. 3195 */ 3196 truncate_pagecache_range(inode, offset, offset + len - 1); 3197 3198 /* if file not oplocked can't be sure whether asking to extend size */ 3199 rc = -EOPNOTSUPP; 3200 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3201 goto zero_range_exit; 3202 3203 rc = smb3_zero_data(file, tcon, offset, len, xid); 3204 if (rc < 0) 3205 goto zero_range_exit; 3206 3207 /* 3208 * do we also need to change the size of the file? 3209 */ 3210 new_size = offset + len; 3211 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3212 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3213 cfile->fid.volatile_fid, cfile->pid, new_size); 3214 if (rc >= 0) { 3215 truncate_setsize(inode, new_size); 3216 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3217 } 3218 } 3219 3220 zero_range_exit: 3221 filemap_invalidate_unlock(inode->i_mapping); 3222 inode_unlock(inode); 3223 free_xid(xid); 3224 if (rc) 3225 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3226 ses->Suid, offset, len, rc); 3227 else 3228 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3229 ses->Suid, offset, len); 3230 return rc; 3231 } 3232 3233 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3234 loff_t offset, loff_t len) 3235 { 3236 struct inode *inode = file_inode(file); 3237 struct cifsFileInfo *cfile = file->private_data; 3238 struct file_zero_data_information fsctl_buf; 3239 long rc; 3240 unsigned int xid; 3241 __u8 set_sparse = 1; 3242 3243 xid = get_xid(); 3244 3245 inode_lock(inode); 3246 /* Need to make file sparse, if not already, before freeing range. */ 3247 /* Consider adding equivalent for compressed since it could also work */ 3248 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3249 rc = -EOPNOTSUPP; 3250 goto out; 3251 } 3252 3253 filemap_invalidate_lock(inode->i_mapping); 3254 /* 3255 * We implement the punch hole through ioctl, so we need remove the page 3256 * caches first, otherwise the data may be inconsistent with the server. 3257 */ 3258 truncate_pagecache_range(inode, offset, offset + len - 1); 3259 3260 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3261 3262 fsctl_buf.FileOffset = cpu_to_le64(offset); 3263 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3264 3265 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3266 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3267 (char *)&fsctl_buf, 3268 sizeof(struct file_zero_data_information), 3269 CIFSMaxBufSize, NULL, NULL); 3270 filemap_invalidate_unlock(inode->i_mapping); 3271 out: 3272 inode_unlock(inode); 3273 free_xid(xid); 3274 return rc; 3275 } 3276 3277 static int smb3_simple_fallocate_write_range(unsigned int xid, 3278 struct cifs_tcon *tcon, 3279 struct cifsFileInfo *cfile, 3280 loff_t off, loff_t len, 3281 char *buf) 3282 { 3283 struct cifs_io_parms io_parms = {0}; 3284 int nbytes; 3285 int rc = 0; 3286 struct kvec iov[2]; 3287 3288 io_parms.netfid = cfile->fid.netfid; 3289 io_parms.pid = current->tgid; 3290 io_parms.tcon = tcon; 3291 io_parms.persistent_fid = cfile->fid.persistent_fid; 3292 io_parms.volatile_fid = cfile->fid.volatile_fid; 3293 3294 while (len) { 3295 io_parms.offset = off; 3296 io_parms.length = len; 3297 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3298 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3299 /* iov[0] is reserved for smb header */ 3300 iov[1].iov_base = buf; 3301 iov[1].iov_len = io_parms.length; 3302 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3303 if (rc) 3304 break; 3305 if (nbytes > len) 3306 return -EINVAL; 3307 buf += nbytes; 3308 off += nbytes; 3309 len -= nbytes; 3310 } 3311 return rc; 3312 } 3313 3314 static int smb3_simple_fallocate_range(unsigned int xid, 3315 struct cifs_tcon *tcon, 3316 struct cifsFileInfo *cfile, 3317 loff_t off, loff_t len) 3318 { 3319 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3320 u32 out_data_len; 3321 char *buf = NULL; 3322 loff_t l; 3323 int rc; 3324 3325 in_data.file_offset = cpu_to_le64(off); 3326 in_data.length = cpu_to_le64(len); 3327 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3328 cfile->fid.volatile_fid, 3329 FSCTL_QUERY_ALLOCATED_RANGES, 3330 (char *)&in_data, sizeof(in_data), 3331 1024 * sizeof(struct file_allocated_range_buffer), 3332 (char **)&out_data, &out_data_len); 3333 if (rc) 3334 goto out; 3335 3336 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3337 if (buf == NULL) { 3338 rc = -ENOMEM; 3339 goto out; 3340 } 3341 3342 tmp_data = out_data; 3343 while (len) { 3344 /* 3345 * The rest of the region is unmapped so write it all. 3346 */ 3347 if (out_data_len == 0) { 3348 rc = smb3_simple_fallocate_write_range(xid, tcon, 3349 cfile, off, len, buf); 3350 goto out; 3351 } 3352 3353 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3354 rc = -EINVAL; 3355 goto out; 3356 } 3357 3358 if (off < le64_to_cpu(tmp_data->file_offset)) { 3359 /* 3360 * We are at a hole. Write until the end of the region 3361 * or until the next allocated data, 3362 * whichever comes next. 3363 */ 3364 l = le64_to_cpu(tmp_data->file_offset) - off; 3365 if (len < l) 3366 l = len; 3367 rc = smb3_simple_fallocate_write_range(xid, tcon, 3368 cfile, off, l, buf); 3369 if (rc) 3370 goto out; 3371 off = off + l; 3372 len = len - l; 3373 if (len == 0) 3374 goto out; 3375 } 3376 /* 3377 * We are at a section of allocated data, just skip forward 3378 * until the end of the data or the end of the region 3379 * we are supposed to fallocate, whichever comes first. 3380 */ 3381 l = le64_to_cpu(tmp_data->length); 3382 if (len < l) 3383 l = len; 3384 off += l; 3385 len -= l; 3386 3387 tmp_data = &tmp_data[1]; 3388 out_data_len -= sizeof(struct file_allocated_range_buffer); 3389 } 3390 3391 out: 3392 kfree(out_data); 3393 kfree(buf); 3394 return rc; 3395 } 3396 3397 3398 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3399 loff_t off, loff_t len, bool keep_size) 3400 { 3401 struct inode *inode; 3402 struct cifsInodeInfo *cifsi; 3403 struct cifsFileInfo *cfile = file->private_data; 3404 long rc = -EOPNOTSUPP; 3405 unsigned int xid; 3406 loff_t new_eof; 3407 3408 xid = get_xid(); 3409 3410 inode = d_inode(cfile->dentry); 3411 cifsi = CIFS_I(inode); 3412 3413 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3414 tcon->ses->Suid, off, len); 3415 /* if file not oplocked can't be sure whether asking to extend size */ 3416 if (!CIFS_CACHE_READ(cifsi)) 3417 if (keep_size == false) { 3418 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3419 tcon->tid, tcon->ses->Suid, off, len, rc); 3420 free_xid(xid); 3421 return rc; 3422 } 3423 3424 /* 3425 * Extending the file 3426 */ 3427 if ((keep_size == false) && i_size_read(inode) < off + len) { 3428 rc = inode_newsize_ok(inode, off + len); 3429 if (rc) 3430 goto out; 3431 3432 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3433 smb2_set_sparse(xid, tcon, cfile, inode, false); 3434 3435 new_eof = off + len; 3436 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3437 cfile->fid.volatile_fid, cfile->pid, new_eof); 3438 if (rc == 0) { 3439 cifsi->server_eof = new_eof; 3440 cifs_setsize(inode, new_eof); 3441 cifs_truncate_page(inode->i_mapping, inode->i_size); 3442 truncate_setsize(inode, new_eof); 3443 } 3444 goto out; 3445 } 3446 3447 /* 3448 * Files are non-sparse by default so falloc may be a no-op 3449 * Must check if file sparse. If not sparse, and since we are not 3450 * extending then no need to do anything since file already allocated 3451 */ 3452 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3453 rc = 0; 3454 goto out; 3455 } 3456 3457 if (keep_size == true) { 3458 /* 3459 * We can not preallocate pages beyond the end of the file 3460 * in SMB2 3461 */ 3462 if (off >= i_size_read(inode)) { 3463 rc = 0; 3464 goto out; 3465 } 3466 /* 3467 * For fallocates that are partially beyond the end of file, 3468 * clamp len so we only fallocate up to the end of file. 3469 */ 3470 if (off + len > i_size_read(inode)) { 3471 len = i_size_read(inode) - off; 3472 } 3473 } 3474 3475 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3476 /* 3477 * At this point, we are trying to fallocate an internal 3478 * regions of a sparse file. Since smb2 does not have a 3479 * fallocate command we have two otions on how to emulate this. 3480 * We can either turn the entire file to become non-sparse 3481 * which we only do if the fallocate is for virtually 3482 * the whole file, or we can overwrite the region with zeroes 3483 * using SMB2_write, which could be prohibitevly expensive 3484 * if len is large. 3485 */ 3486 /* 3487 * We are only trying to fallocate a small region so 3488 * just write it with zero. 3489 */ 3490 if (len <= 1024 * 1024) { 3491 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3492 off, len); 3493 goto out; 3494 } 3495 3496 /* 3497 * Check if falloc starts within first few pages of file 3498 * and ends within a few pages of the end of file to 3499 * ensure that most of file is being forced to be 3500 * fallocated now. If so then setting whole file sparse 3501 * ie potentially making a few extra pages at the beginning 3502 * or end of the file non-sparse via set_sparse is harmless. 3503 */ 3504 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3505 rc = -EOPNOTSUPP; 3506 goto out; 3507 } 3508 } 3509 3510 smb2_set_sparse(xid, tcon, cfile, inode, false); 3511 rc = 0; 3512 3513 out: 3514 if (rc) 3515 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3516 tcon->ses->Suid, off, len, rc); 3517 else 3518 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3519 tcon->ses->Suid, off, len); 3520 3521 free_xid(xid); 3522 return rc; 3523 } 3524 3525 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3526 loff_t off, loff_t len) 3527 { 3528 int rc; 3529 unsigned int xid; 3530 struct inode *inode = file_inode(file); 3531 struct cifsFileInfo *cfile = file->private_data; 3532 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3533 loff_t old_eof, new_eof; 3534 3535 xid = get_xid(); 3536 3537 inode_lock(inode); 3538 3539 old_eof = i_size_read(inode); 3540 if ((off >= old_eof) || 3541 off + len >= old_eof) { 3542 rc = -EINVAL; 3543 goto out; 3544 } 3545 3546 filemap_invalidate_lock(inode->i_mapping); 3547 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3548 if (rc < 0) 3549 goto out_2; 3550 3551 truncate_pagecache_range(inode, off, old_eof); 3552 3553 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3554 old_eof - off - len, off); 3555 if (rc < 0) 3556 goto out_2; 3557 3558 new_eof = old_eof - len; 3559 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3560 cfile->fid.volatile_fid, cfile->pid, new_eof); 3561 if (rc < 0) 3562 goto out_2; 3563 3564 rc = 0; 3565 3566 cifsi->server_eof = i_size_read(inode) - len; 3567 truncate_setsize(inode, cifsi->server_eof); 3568 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3569 out_2: 3570 filemap_invalidate_unlock(inode->i_mapping); 3571 out: 3572 inode_unlock(inode); 3573 free_xid(xid); 3574 return rc; 3575 } 3576 3577 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3578 loff_t off, loff_t len) 3579 { 3580 int rc; 3581 unsigned int xid; 3582 struct cifsFileInfo *cfile = file->private_data; 3583 struct inode *inode = file_inode(file); 3584 __u64 count, old_eof, new_eof; 3585 3586 xid = get_xid(); 3587 3588 inode_lock(inode); 3589 3590 old_eof = i_size_read(inode); 3591 if (off >= old_eof) { 3592 rc = -EINVAL; 3593 goto out; 3594 } 3595 3596 count = old_eof - off; 3597 new_eof = old_eof + len; 3598 3599 filemap_invalidate_lock(inode->i_mapping); 3600 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3601 if (rc < 0) 3602 goto out_2; 3603 truncate_pagecache_range(inode, off, old_eof); 3604 3605 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3606 cfile->fid.volatile_fid, cfile->pid, new_eof); 3607 if (rc < 0) 3608 goto out_2; 3609 3610 truncate_setsize(inode, new_eof); 3611 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3612 3613 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3614 if (rc < 0) 3615 goto out_2; 3616 3617 rc = smb3_zero_data(file, tcon, off, len, xid); 3618 if (rc < 0) 3619 goto out_2; 3620 3621 rc = 0; 3622 out_2: 3623 filemap_invalidate_unlock(inode->i_mapping); 3624 out: 3625 inode_unlock(inode); 3626 free_xid(xid); 3627 return rc; 3628 } 3629 3630 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3631 { 3632 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3633 struct cifsInodeInfo *cifsi; 3634 struct inode *inode; 3635 int rc = 0; 3636 struct file_allocated_range_buffer in_data, *out_data = NULL; 3637 u32 out_data_len; 3638 unsigned int xid; 3639 3640 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3641 return generic_file_llseek(file, offset, whence); 3642 3643 inode = d_inode(cfile->dentry); 3644 cifsi = CIFS_I(inode); 3645 3646 if (offset < 0 || offset >= i_size_read(inode)) 3647 return -ENXIO; 3648 3649 xid = get_xid(); 3650 /* 3651 * We need to be sure that all dirty pages are written as they 3652 * might fill holes on the server. 3653 * Note that we also MUST flush any written pages since at least 3654 * some servers (Windows2016) will not reflect recent writes in 3655 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3656 */ 3657 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3658 if (wrcfile) { 3659 filemap_write_and_wait(inode->i_mapping); 3660 smb2_flush_file(xid, tcon, &wrcfile->fid); 3661 cifsFileInfo_put(wrcfile); 3662 } 3663 3664 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3665 if (whence == SEEK_HOLE) 3666 offset = i_size_read(inode); 3667 goto lseek_exit; 3668 } 3669 3670 in_data.file_offset = cpu_to_le64(offset); 3671 in_data.length = cpu_to_le64(i_size_read(inode)); 3672 3673 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3674 cfile->fid.volatile_fid, 3675 FSCTL_QUERY_ALLOCATED_RANGES, 3676 (char *)&in_data, sizeof(in_data), 3677 sizeof(struct file_allocated_range_buffer), 3678 (char **)&out_data, &out_data_len); 3679 if (rc == -E2BIG) 3680 rc = 0; 3681 if (rc) 3682 goto lseek_exit; 3683 3684 if (whence == SEEK_HOLE && out_data_len == 0) 3685 goto lseek_exit; 3686 3687 if (whence == SEEK_DATA && out_data_len == 0) { 3688 rc = -ENXIO; 3689 goto lseek_exit; 3690 } 3691 3692 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3693 rc = -EINVAL; 3694 goto lseek_exit; 3695 } 3696 if (whence == SEEK_DATA) { 3697 offset = le64_to_cpu(out_data->file_offset); 3698 goto lseek_exit; 3699 } 3700 if (offset < le64_to_cpu(out_data->file_offset)) 3701 goto lseek_exit; 3702 3703 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3704 3705 lseek_exit: 3706 free_xid(xid); 3707 kfree(out_data); 3708 if (!rc) 3709 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3710 else 3711 return rc; 3712 } 3713 3714 static int smb3_fiemap(struct cifs_tcon *tcon, 3715 struct cifsFileInfo *cfile, 3716 struct fiemap_extent_info *fei, u64 start, u64 len) 3717 { 3718 unsigned int xid; 3719 struct file_allocated_range_buffer in_data, *out_data; 3720 u32 out_data_len; 3721 int i, num, rc, flags, last_blob; 3722 u64 next; 3723 3724 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3725 if (rc) 3726 return rc; 3727 3728 xid = get_xid(); 3729 again: 3730 in_data.file_offset = cpu_to_le64(start); 3731 in_data.length = cpu_to_le64(len); 3732 3733 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3734 cfile->fid.volatile_fid, 3735 FSCTL_QUERY_ALLOCATED_RANGES, 3736 (char *)&in_data, sizeof(in_data), 3737 1024 * sizeof(struct file_allocated_range_buffer), 3738 (char **)&out_data, &out_data_len); 3739 if (rc == -E2BIG) { 3740 last_blob = 0; 3741 rc = 0; 3742 } else 3743 last_blob = 1; 3744 if (rc) 3745 goto out; 3746 3747 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3748 rc = -EINVAL; 3749 goto out; 3750 } 3751 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3752 rc = -EINVAL; 3753 goto out; 3754 } 3755 3756 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3757 for (i = 0; i < num; i++) { 3758 flags = 0; 3759 if (i == num - 1 && last_blob) 3760 flags |= FIEMAP_EXTENT_LAST; 3761 3762 rc = fiemap_fill_next_extent(fei, 3763 le64_to_cpu(out_data[i].file_offset), 3764 le64_to_cpu(out_data[i].file_offset), 3765 le64_to_cpu(out_data[i].length), 3766 flags); 3767 if (rc < 0) 3768 goto out; 3769 if (rc == 1) { 3770 rc = 0; 3771 goto out; 3772 } 3773 } 3774 3775 if (!last_blob) { 3776 next = le64_to_cpu(out_data[num - 1].file_offset) + 3777 le64_to_cpu(out_data[num - 1].length); 3778 len = len - (next - start); 3779 start = next; 3780 goto again; 3781 } 3782 3783 out: 3784 free_xid(xid); 3785 kfree(out_data); 3786 return rc; 3787 } 3788 3789 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3790 loff_t off, loff_t len) 3791 { 3792 /* KEEP_SIZE already checked for by do_fallocate */ 3793 if (mode & FALLOC_FL_PUNCH_HOLE) 3794 return smb3_punch_hole(file, tcon, off, len); 3795 else if (mode & FALLOC_FL_ZERO_RANGE) { 3796 if (mode & FALLOC_FL_KEEP_SIZE) 3797 return smb3_zero_range(file, tcon, off, len, true); 3798 return smb3_zero_range(file, tcon, off, len, false); 3799 } else if (mode == FALLOC_FL_KEEP_SIZE) 3800 return smb3_simple_falloc(file, tcon, off, len, true); 3801 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3802 return smb3_collapse_range(file, tcon, off, len); 3803 else if (mode == FALLOC_FL_INSERT_RANGE) 3804 return smb3_insert_range(file, tcon, off, len); 3805 else if (mode == 0) 3806 return smb3_simple_falloc(file, tcon, off, len, false); 3807 3808 return -EOPNOTSUPP; 3809 } 3810 3811 static void 3812 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3813 struct cifsInodeInfo *cinode, __u32 oplock, 3814 unsigned int epoch, bool *purge_cache) 3815 { 3816 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3817 } 3818 3819 static void 3820 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3821 unsigned int epoch, bool *purge_cache); 3822 3823 static void 3824 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3825 struct cifsInodeInfo *cinode, __u32 oplock, 3826 unsigned int epoch, bool *purge_cache) 3827 { 3828 unsigned int old_state = cinode->oplock; 3829 unsigned int old_epoch = cinode->epoch; 3830 unsigned int new_state; 3831 3832 if (epoch > old_epoch) { 3833 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3834 cinode->epoch = epoch; 3835 } 3836 3837 new_state = cinode->oplock; 3838 *purge_cache = false; 3839 3840 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3841 (new_state & CIFS_CACHE_READ_FLG) == 0) 3842 *purge_cache = true; 3843 else if (old_state == new_state && (epoch - old_epoch > 1)) 3844 *purge_cache = true; 3845 } 3846 3847 static void 3848 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3849 unsigned int epoch, bool *purge_cache) 3850 { 3851 oplock &= 0xFF; 3852 cinode->lease_granted = false; 3853 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3854 return; 3855 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3856 cinode->oplock = CIFS_CACHE_RHW_FLG; 3857 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3858 &cinode->netfs.inode); 3859 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3860 cinode->oplock = CIFS_CACHE_RW_FLG; 3861 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3862 &cinode->netfs.inode); 3863 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3864 cinode->oplock = CIFS_CACHE_READ_FLG; 3865 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3866 &cinode->netfs.inode); 3867 } else 3868 cinode->oplock = 0; 3869 } 3870 3871 static void 3872 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3873 unsigned int epoch, bool *purge_cache) 3874 { 3875 char message[5] = {0}; 3876 unsigned int new_oplock = 0; 3877 3878 oplock &= 0xFF; 3879 cinode->lease_granted = true; 3880 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3881 return; 3882 3883 /* Check if the server granted an oplock rather than a lease */ 3884 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3885 return smb2_set_oplock_level(cinode, oplock, epoch, 3886 purge_cache); 3887 3888 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3889 new_oplock |= CIFS_CACHE_READ_FLG; 3890 strcat(message, "R"); 3891 } 3892 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3893 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3894 strcat(message, "H"); 3895 } 3896 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3897 new_oplock |= CIFS_CACHE_WRITE_FLG; 3898 strcat(message, "W"); 3899 } 3900 if (!new_oplock) 3901 strncpy(message, "None", sizeof(message)); 3902 3903 cinode->oplock = new_oplock; 3904 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3905 &cinode->netfs.inode); 3906 } 3907 3908 static void 3909 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3910 unsigned int epoch, bool *purge_cache) 3911 { 3912 unsigned int old_oplock = cinode->oplock; 3913 3914 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3915 3916 if (purge_cache) { 3917 *purge_cache = false; 3918 if (old_oplock == CIFS_CACHE_READ_FLG) { 3919 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3920 (epoch - cinode->epoch > 0)) 3921 *purge_cache = true; 3922 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3923 (epoch - cinode->epoch > 1)) 3924 *purge_cache = true; 3925 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3926 (epoch - cinode->epoch > 1)) 3927 *purge_cache = true; 3928 else if (cinode->oplock == 0 && 3929 (epoch - cinode->epoch > 0)) 3930 *purge_cache = true; 3931 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3932 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3933 (epoch - cinode->epoch > 0)) 3934 *purge_cache = true; 3935 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3936 (epoch - cinode->epoch > 1)) 3937 *purge_cache = true; 3938 } 3939 cinode->epoch = epoch; 3940 } 3941 } 3942 3943 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3944 static bool 3945 smb2_is_read_op(__u32 oplock) 3946 { 3947 return oplock == SMB2_OPLOCK_LEVEL_II; 3948 } 3949 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 3950 3951 static bool 3952 smb21_is_read_op(__u32 oplock) 3953 { 3954 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 3955 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 3956 } 3957 3958 static __le32 3959 map_oplock_to_lease(u8 oplock) 3960 { 3961 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3962 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 3963 else if (oplock == SMB2_OPLOCK_LEVEL_II) 3964 return SMB2_LEASE_READ_CACHING_LE; 3965 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 3966 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 3967 SMB2_LEASE_WRITE_CACHING_LE; 3968 return 0; 3969 } 3970 3971 static char * 3972 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 3973 { 3974 struct create_lease *buf; 3975 3976 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 3977 if (!buf) 3978 return NULL; 3979 3980 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 3981 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 3982 3983 buf->ccontext.DataOffset = cpu_to_le16(offsetof 3984 (struct create_lease, lcontext)); 3985 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 3986 buf->ccontext.NameOffset = cpu_to_le16(offsetof 3987 (struct create_lease, Name)); 3988 buf->ccontext.NameLength = cpu_to_le16(4); 3989 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 3990 buf->Name[0] = 'R'; 3991 buf->Name[1] = 'q'; 3992 buf->Name[2] = 'L'; 3993 buf->Name[3] = 's'; 3994 return (char *)buf; 3995 } 3996 3997 static char * 3998 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 3999 { 4000 struct create_lease_v2 *buf; 4001 4002 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4003 if (!buf) 4004 return NULL; 4005 4006 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4007 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4008 4009 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4010 (struct create_lease_v2, lcontext)); 4011 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4012 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4013 (struct create_lease_v2, Name)); 4014 buf->ccontext.NameLength = cpu_to_le16(4); 4015 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4016 buf->Name[0] = 'R'; 4017 buf->Name[1] = 'q'; 4018 buf->Name[2] = 'L'; 4019 buf->Name[3] = 's'; 4020 return (char *)buf; 4021 } 4022 4023 static __u8 4024 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4025 { 4026 struct create_lease *lc = (struct create_lease *)buf; 4027 4028 *epoch = 0; /* not used */ 4029 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4030 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4031 return le32_to_cpu(lc->lcontext.LeaseState); 4032 } 4033 4034 static __u8 4035 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4036 { 4037 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4038 4039 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4040 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4041 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4042 if (lease_key) 4043 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4044 return le32_to_cpu(lc->lcontext.LeaseState); 4045 } 4046 4047 static unsigned int 4048 smb2_wp_retry_size(struct inode *inode) 4049 { 4050 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4051 SMB2_MAX_BUFFER_SIZE); 4052 } 4053 4054 static bool 4055 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4056 { 4057 return !cfile->invalidHandle; 4058 } 4059 4060 static void 4061 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4062 struct smb_rqst *old_rq, __le16 cipher_type) 4063 { 4064 struct smb2_hdr *shdr = 4065 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4066 4067 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4068 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4069 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4070 tr_hdr->Flags = cpu_to_le16(0x01); 4071 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4072 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4073 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4074 else 4075 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4076 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4077 } 4078 4079 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4080 int num_rqst, const u8 *sig, u8 **iv, 4081 struct aead_request **req, struct sg_table *sgt, 4082 unsigned int *num_sgs, size_t *sensitive_size) 4083 { 4084 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4085 unsigned int iv_size = crypto_aead_ivsize(tfm); 4086 unsigned int len; 4087 u8 *p; 4088 4089 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4090 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4091 return ERR_PTR(*num_sgs); 4092 4093 len = iv_size; 4094 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4095 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4096 len += req_size; 4097 len = ALIGN(len, __alignof__(struct scatterlist)); 4098 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4099 *sensitive_size = len; 4100 4101 p = kvzalloc(len, GFP_NOFS); 4102 if (!p) 4103 return ERR_PTR(-ENOMEM); 4104 4105 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4106 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4107 crypto_tfm_ctx_alignment()); 4108 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4109 __alignof__(struct scatterlist)); 4110 return p; 4111 } 4112 4113 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4114 int num_rqst, const u8 *sig, u8 **iv, 4115 struct aead_request **req, struct scatterlist **sgl, 4116 size_t *sensitive_size) 4117 { 4118 struct sg_table sgtable = {}; 4119 unsigned int skip, num_sgs, i, j; 4120 ssize_t rc; 4121 void *p; 4122 4123 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4124 &num_sgs, sensitive_size); 4125 if (IS_ERR(p)) 4126 return ERR_CAST(p); 4127 4128 sg_init_marker(sgtable.sgl, num_sgs); 4129 4130 /* 4131 * The first rqst has a transform header where the 4132 * first 20 bytes are not part of the encrypted blob. 4133 */ 4134 skip = 20; 4135 4136 for (i = 0; i < num_rqst; i++) { 4137 struct iov_iter *iter = &rqst[i].rq_iter; 4138 size_t count = iov_iter_count(iter); 4139 4140 for (j = 0; j < rqst[i].rq_nvec; j++) { 4141 cifs_sg_set_buf(&sgtable, 4142 rqst[i].rq_iov[j].iov_base + skip, 4143 rqst[i].rq_iov[j].iov_len - skip); 4144 4145 /* See the above comment on the 'skip' assignment */ 4146 skip = 0; 4147 } 4148 sgtable.orig_nents = sgtable.nents; 4149 4150 rc = extract_iter_to_sg(iter, count, &sgtable, 4151 num_sgs - sgtable.nents, 0); 4152 iov_iter_revert(iter, rc); 4153 sgtable.orig_nents = sgtable.nents; 4154 } 4155 4156 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4157 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4158 *sgl = sgtable.sgl; 4159 return p; 4160 } 4161 4162 static int 4163 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4164 { 4165 struct TCP_Server_Info *pserver; 4166 struct cifs_ses *ses; 4167 u8 *ses_enc_key; 4168 4169 /* If server is a channel, select the primary channel */ 4170 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4171 4172 spin_lock(&cifs_tcp_ses_lock); 4173 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4174 if (ses->Suid == ses_id) { 4175 spin_lock(&ses->ses_lock); 4176 ses_enc_key = enc ? ses->smb3encryptionkey : 4177 ses->smb3decryptionkey; 4178 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4179 spin_unlock(&ses->ses_lock); 4180 spin_unlock(&cifs_tcp_ses_lock); 4181 return 0; 4182 } 4183 } 4184 spin_unlock(&cifs_tcp_ses_lock); 4185 4186 trace_smb3_ses_not_found(ses_id); 4187 4188 return -EAGAIN; 4189 } 4190 /* 4191 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4192 * iov[0] - transform header (associate data), 4193 * iov[1-N] - SMB2 header and pages - data to encrypt. 4194 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4195 * untouched. 4196 */ 4197 static int 4198 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4199 struct smb_rqst *rqst, int enc) 4200 { 4201 struct smb2_transform_hdr *tr_hdr = 4202 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4203 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4204 int rc = 0; 4205 struct scatterlist *sg; 4206 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4207 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4208 struct aead_request *req; 4209 u8 *iv; 4210 DECLARE_CRYPTO_WAIT(wait); 4211 struct crypto_aead *tfm; 4212 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4213 void *creq; 4214 size_t sensitive_size; 4215 4216 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4217 if (rc) { 4218 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4219 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4220 return rc; 4221 } 4222 4223 rc = smb3_crypto_aead_allocate(server); 4224 if (rc) { 4225 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4226 return rc; 4227 } 4228 4229 tfm = enc ? server->secmech.enc : server->secmech.dec; 4230 4231 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4232 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4233 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4234 else 4235 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4236 4237 if (rc) { 4238 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4239 return rc; 4240 } 4241 4242 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4243 if (rc) { 4244 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4245 return rc; 4246 } 4247 4248 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4249 &sensitive_size); 4250 if (IS_ERR(creq)) 4251 return PTR_ERR(creq); 4252 4253 if (!enc) { 4254 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4255 crypt_len += SMB2_SIGNATURE_SIZE; 4256 } 4257 4258 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4259 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4260 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4261 else { 4262 iv[0] = 3; 4263 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4264 } 4265 4266 aead_request_set_tfm(req, tfm); 4267 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4268 aead_request_set_ad(req, assoc_data_len); 4269 4270 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4271 crypto_req_done, &wait); 4272 4273 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4274 : crypto_aead_decrypt(req), &wait); 4275 4276 if (!rc && enc) 4277 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4278 4279 kvfree_sensitive(creq, sensitive_size); 4280 return rc; 4281 } 4282 4283 /* 4284 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4285 */ 4286 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4287 { 4288 struct folio *folio; 4289 4290 XA_STATE(xas, buffer, 0); 4291 4292 rcu_read_lock(); 4293 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4294 folio_put(folio); 4295 } 4296 rcu_read_unlock(); 4297 xa_destroy(buffer); 4298 } 4299 4300 void 4301 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4302 { 4303 int i; 4304 4305 for (i = 0; i < num_rqst; i++) 4306 if (!xa_empty(&rqst[i].rq_buffer)) 4307 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4308 } 4309 4310 /* 4311 * This function will initialize new_rq and encrypt the content. 4312 * The first entry, new_rq[0], only contains a single iov which contains 4313 * a smb2_transform_hdr and is pre-allocated by the caller. 4314 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4315 * 4316 * The end result is an array of smb_rqst structures where the first structure 4317 * only contains a single iov for the transform header which we then can pass 4318 * to crypt_message(). 4319 * 4320 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4321 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4322 */ 4323 static int 4324 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4325 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4326 { 4327 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4328 struct page *page; 4329 unsigned int orig_len = 0; 4330 int i, j; 4331 int rc = -ENOMEM; 4332 4333 for (i = 1; i < num_rqst; i++) { 4334 struct smb_rqst *old = &old_rq[i - 1]; 4335 struct smb_rqst *new = &new_rq[i]; 4336 struct xarray *buffer = &new->rq_buffer; 4337 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4338 4339 orig_len += smb_rqst_len(server, old); 4340 new->rq_iov = old->rq_iov; 4341 new->rq_nvec = old->rq_nvec; 4342 4343 xa_init(buffer); 4344 4345 if (size > 0) { 4346 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4347 4348 for (j = 0; j < npages; j++) { 4349 void *o; 4350 4351 rc = -ENOMEM; 4352 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4353 if (!page) 4354 goto err_free; 4355 page->index = j; 4356 o = xa_store(buffer, j, page, GFP_KERNEL); 4357 if (xa_is_err(o)) { 4358 rc = xa_err(o); 4359 put_page(page); 4360 goto err_free; 4361 } 4362 4363 xa_set_mark(buffer, j, XA_MARK_0); 4364 4365 seg = min_t(size_t, size - copied, PAGE_SIZE); 4366 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4367 rc = -EFAULT; 4368 goto err_free; 4369 } 4370 copied += seg; 4371 } 4372 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4373 buffer, 0, size); 4374 new->rq_iter_size = size; 4375 } 4376 } 4377 4378 /* fill the 1st iov with a transform header */ 4379 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4380 4381 rc = crypt_message(server, num_rqst, new_rq, 1); 4382 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4383 if (rc) 4384 goto err_free; 4385 4386 return rc; 4387 4388 err_free: 4389 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4390 return rc; 4391 } 4392 4393 static int 4394 smb3_is_transform_hdr(void *buf) 4395 { 4396 struct smb2_transform_hdr *trhdr = buf; 4397 4398 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4399 } 4400 4401 static int 4402 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4403 unsigned int buf_data_size, struct iov_iter *iter, 4404 bool is_offloaded) 4405 { 4406 struct kvec iov[2]; 4407 struct smb_rqst rqst = {NULL}; 4408 size_t iter_size = 0; 4409 int rc; 4410 4411 iov[0].iov_base = buf; 4412 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4413 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4414 iov[1].iov_len = buf_data_size; 4415 4416 rqst.rq_iov = iov; 4417 rqst.rq_nvec = 2; 4418 if (iter) { 4419 rqst.rq_iter = *iter; 4420 rqst.rq_iter_size = iov_iter_count(iter); 4421 iter_size = iov_iter_count(iter); 4422 } 4423 4424 rc = crypt_message(server, 1, &rqst, 0); 4425 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4426 4427 if (rc) 4428 return rc; 4429 4430 memmove(buf, iov[1].iov_base, buf_data_size); 4431 4432 if (!is_offloaded) 4433 server->total_read = buf_data_size + iter_size; 4434 4435 return rc; 4436 } 4437 4438 static int 4439 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4440 unsigned int skip, struct iov_iter *iter) 4441 { 4442 struct page *page; 4443 unsigned long index; 4444 4445 xa_for_each(pages, index, page) { 4446 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4447 4448 n = copy_page_to_iter(page, skip, len, iter); 4449 if (n != len) { 4450 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4451 return -EIO; 4452 } 4453 data_size -= n; 4454 skip = 0; 4455 } 4456 4457 return 0; 4458 } 4459 4460 static int 4461 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4462 char *buf, unsigned int buf_len, struct xarray *pages, 4463 unsigned int pages_len, bool is_offloaded) 4464 { 4465 unsigned int data_offset; 4466 unsigned int data_len; 4467 unsigned int cur_off; 4468 unsigned int cur_page_idx; 4469 unsigned int pad_len; 4470 struct cifs_readdata *rdata = mid->callback_data; 4471 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4472 int length; 4473 bool use_rdma_mr = false; 4474 4475 if (shdr->Command != SMB2_READ) { 4476 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4477 return -EOPNOTSUPP; 4478 } 4479 4480 if (server->ops->is_session_expired && 4481 server->ops->is_session_expired(buf)) { 4482 if (!is_offloaded) 4483 cifs_reconnect(server, true); 4484 return -1; 4485 } 4486 4487 if (server->ops->is_status_pending && 4488 server->ops->is_status_pending(buf, server)) 4489 return -1; 4490 4491 /* set up first two iov to get credits */ 4492 rdata->iov[0].iov_base = buf; 4493 rdata->iov[0].iov_len = 0; 4494 rdata->iov[1].iov_base = buf; 4495 rdata->iov[1].iov_len = 4496 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4497 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4498 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4499 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4500 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4501 4502 rdata->result = server->ops->map_error(buf, true); 4503 if (rdata->result != 0) { 4504 cifs_dbg(FYI, "%s: server returned error %d\n", 4505 __func__, rdata->result); 4506 /* normal error on read response */ 4507 if (is_offloaded) 4508 mid->mid_state = MID_RESPONSE_RECEIVED; 4509 else 4510 dequeue_mid(mid, false); 4511 return 0; 4512 } 4513 4514 data_offset = server->ops->read_data_offset(buf); 4515 #ifdef CONFIG_CIFS_SMB_DIRECT 4516 use_rdma_mr = rdata->mr; 4517 #endif 4518 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4519 4520 if (data_offset < server->vals->read_rsp_size) { 4521 /* 4522 * win2k8 sometimes sends an offset of 0 when the read 4523 * is beyond the EOF. Treat it as if the data starts just after 4524 * the header. 4525 */ 4526 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4527 __func__, data_offset); 4528 data_offset = server->vals->read_rsp_size; 4529 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4530 /* data_offset is beyond the end of smallbuf */ 4531 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4532 __func__, data_offset); 4533 rdata->result = -EIO; 4534 if (is_offloaded) 4535 mid->mid_state = MID_RESPONSE_MALFORMED; 4536 else 4537 dequeue_mid(mid, rdata->result); 4538 return 0; 4539 } 4540 4541 pad_len = data_offset - server->vals->read_rsp_size; 4542 4543 if (buf_len <= data_offset) { 4544 /* read response payload is in pages */ 4545 cur_page_idx = pad_len / PAGE_SIZE; 4546 cur_off = pad_len % PAGE_SIZE; 4547 4548 if (cur_page_idx != 0) { 4549 /* data offset is beyond the 1st page of response */ 4550 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4551 __func__, data_offset); 4552 rdata->result = -EIO; 4553 if (is_offloaded) 4554 mid->mid_state = MID_RESPONSE_MALFORMED; 4555 else 4556 dequeue_mid(mid, rdata->result); 4557 return 0; 4558 } 4559 4560 if (data_len > pages_len - pad_len) { 4561 /* data_len is corrupt -- discard frame */ 4562 rdata->result = -EIO; 4563 if (is_offloaded) 4564 mid->mid_state = MID_RESPONSE_MALFORMED; 4565 else 4566 dequeue_mid(mid, rdata->result); 4567 return 0; 4568 } 4569 4570 /* Copy the data to the output I/O iterator. */ 4571 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4572 cur_off, &rdata->iter); 4573 if (rdata->result != 0) { 4574 if (is_offloaded) 4575 mid->mid_state = MID_RESPONSE_MALFORMED; 4576 else 4577 dequeue_mid(mid, rdata->result); 4578 return 0; 4579 } 4580 rdata->got_bytes = pages_len; 4581 4582 } else if (buf_len >= data_offset + data_len) { 4583 /* read response payload is in buf */ 4584 WARN_ONCE(pages && !xa_empty(pages), 4585 "read data can be either in buf or in pages"); 4586 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4587 if (length < 0) 4588 return length; 4589 rdata->got_bytes = data_len; 4590 } else { 4591 /* read response payload cannot be in both buf and pages */ 4592 WARN_ONCE(1, "buf can not contain only a part of read data"); 4593 rdata->result = -EIO; 4594 if (is_offloaded) 4595 mid->mid_state = MID_RESPONSE_MALFORMED; 4596 else 4597 dequeue_mid(mid, rdata->result); 4598 return 0; 4599 } 4600 4601 if (is_offloaded) 4602 mid->mid_state = MID_RESPONSE_RECEIVED; 4603 else 4604 dequeue_mid(mid, false); 4605 return 0; 4606 } 4607 4608 struct smb2_decrypt_work { 4609 struct work_struct decrypt; 4610 struct TCP_Server_Info *server; 4611 struct xarray buffer; 4612 char *buf; 4613 unsigned int len; 4614 }; 4615 4616 4617 static void smb2_decrypt_offload(struct work_struct *work) 4618 { 4619 struct smb2_decrypt_work *dw = container_of(work, 4620 struct smb2_decrypt_work, decrypt); 4621 int rc; 4622 struct mid_q_entry *mid; 4623 struct iov_iter iter; 4624 4625 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4626 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4627 &iter, true); 4628 if (rc) { 4629 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4630 goto free_pages; 4631 } 4632 4633 dw->server->lstrp = jiffies; 4634 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4635 if (mid == NULL) 4636 cifs_dbg(FYI, "mid not found\n"); 4637 else { 4638 mid->decrypted = true; 4639 rc = handle_read_data(dw->server, mid, dw->buf, 4640 dw->server->vals->read_rsp_size, 4641 &dw->buffer, dw->len, 4642 true); 4643 if (rc >= 0) { 4644 #ifdef CONFIG_CIFS_STATS2 4645 mid->when_received = jiffies; 4646 #endif 4647 if (dw->server->ops->is_network_name_deleted) 4648 dw->server->ops->is_network_name_deleted(dw->buf, 4649 dw->server); 4650 4651 mid->callback(mid); 4652 } else { 4653 spin_lock(&dw->server->srv_lock); 4654 if (dw->server->tcpStatus == CifsNeedReconnect) { 4655 spin_lock(&dw->server->mid_lock); 4656 mid->mid_state = MID_RETRY_NEEDED; 4657 spin_unlock(&dw->server->mid_lock); 4658 spin_unlock(&dw->server->srv_lock); 4659 mid->callback(mid); 4660 } else { 4661 spin_lock(&dw->server->mid_lock); 4662 mid->mid_state = MID_REQUEST_SUBMITTED; 4663 mid->mid_flags &= ~(MID_DELETED); 4664 list_add_tail(&mid->qhead, 4665 &dw->server->pending_mid_q); 4666 spin_unlock(&dw->server->mid_lock); 4667 spin_unlock(&dw->server->srv_lock); 4668 } 4669 } 4670 release_mid(mid); 4671 } 4672 4673 free_pages: 4674 cifs_clear_xarray_buffer(&dw->buffer); 4675 cifs_small_buf_release(dw->buf); 4676 kfree(dw); 4677 } 4678 4679 4680 static int 4681 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4682 int *num_mids) 4683 { 4684 struct page *page; 4685 char *buf = server->smallbuf; 4686 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4687 struct iov_iter iter; 4688 unsigned int len, npages; 4689 unsigned int buflen = server->pdu_size; 4690 int rc; 4691 int i = 0; 4692 struct smb2_decrypt_work *dw; 4693 4694 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4695 if (!dw) 4696 return -ENOMEM; 4697 xa_init(&dw->buffer); 4698 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4699 dw->server = server; 4700 4701 *num_mids = 1; 4702 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4703 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4704 4705 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4706 if (rc < 0) 4707 goto free_dw; 4708 server->total_read += rc; 4709 4710 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4711 server->vals->read_rsp_size; 4712 dw->len = len; 4713 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4714 4715 rc = -ENOMEM; 4716 for (; i < npages; i++) { 4717 void *old; 4718 4719 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4720 if (!page) 4721 goto discard_data; 4722 page->index = i; 4723 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4724 if (xa_is_err(old)) { 4725 rc = xa_err(old); 4726 put_page(page); 4727 goto discard_data; 4728 } 4729 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4730 } 4731 4732 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4733 4734 /* Read the data into the buffer and clear excess bufferage. */ 4735 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4736 if (rc < 0) 4737 goto discard_data; 4738 4739 server->total_read += rc; 4740 if (rc < npages * PAGE_SIZE) 4741 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4742 iov_iter_revert(&iter, npages * PAGE_SIZE); 4743 iov_iter_truncate(&iter, dw->len); 4744 4745 rc = cifs_discard_remaining_data(server); 4746 if (rc) 4747 goto free_pages; 4748 4749 /* 4750 * For large reads, offload to different thread for better performance, 4751 * use more cores decrypting which can be expensive 4752 */ 4753 4754 if ((server->min_offload) && (server->in_flight > 1) && 4755 (server->pdu_size >= server->min_offload)) { 4756 dw->buf = server->smallbuf; 4757 server->smallbuf = (char *)cifs_small_buf_get(); 4758 4759 queue_work(decrypt_wq, &dw->decrypt); 4760 *num_mids = 0; /* worker thread takes care of finding mid */ 4761 return -1; 4762 } 4763 4764 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4765 &iter, false); 4766 if (rc) 4767 goto free_pages; 4768 4769 *mid = smb2_find_mid(server, buf); 4770 if (*mid == NULL) { 4771 cifs_dbg(FYI, "mid not found\n"); 4772 } else { 4773 cifs_dbg(FYI, "mid found\n"); 4774 (*mid)->decrypted = true; 4775 rc = handle_read_data(server, *mid, buf, 4776 server->vals->read_rsp_size, 4777 &dw->buffer, dw->len, false); 4778 if (rc >= 0) { 4779 if (server->ops->is_network_name_deleted) { 4780 server->ops->is_network_name_deleted(buf, 4781 server); 4782 } 4783 } 4784 } 4785 4786 free_pages: 4787 cifs_clear_xarray_buffer(&dw->buffer); 4788 free_dw: 4789 kfree(dw); 4790 return rc; 4791 discard_data: 4792 cifs_discard_remaining_data(server); 4793 goto free_pages; 4794 } 4795 4796 static int 4797 receive_encrypted_standard(struct TCP_Server_Info *server, 4798 struct mid_q_entry **mids, char **bufs, 4799 int *num_mids) 4800 { 4801 int ret, length; 4802 char *buf = server->smallbuf; 4803 struct smb2_hdr *shdr; 4804 unsigned int pdu_length = server->pdu_size; 4805 unsigned int buf_size; 4806 unsigned int next_cmd; 4807 struct mid_q_entry *mid_entry; 4808 int next_is_large; 4809 char *next_buffer = NULL; 4810 4811 *num_mids = 0; 4812 4813 /* switch to large buffer if too big for a small one */ 4814 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4815 server->large_buf = true; 4816 memcpy(server->bigbuf, buf, server->total_read); 4817 buf = server->bigbuf; 4818 } 4819 4820 /* now read the rest */ 4821 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4822 pdu_length - HEADER_SIZE(server) + 1); 4823 if (length < 0) 4824 return length; 4825 server->total_read += length; 4826 4827 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4828 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4829 if (length) 4830 return length; 4831 4832 next_is_large = server->large_buf; 4833 one_more: 4834 shdr = (struct smb2_hdr *)buf; 4835 next_cmd = le32_to_cpu(shdr->NextCommand); 4836 if (next_cmd) { 4837 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4838 return -1; 4839 if (next_is_large) 4840 next_buffer = (char *)cifs_buf_get(); 4841 else 4842 next_buffer = (char *)cifs_small_buf_get(); 4843 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4844 } 4845 4846 mid_entry = smb2_find_mid(server, buf); 4847 if (mid_entry == NULL) 4848 cifs_dbg(FYI, "mid not found\n"); 4849 else { 4850 cifs_dbg(FYI, "mid found\n"); 4851 mid_entry->decrypted = true; 4852 mid_entry->resp_buf_size = server->pdu_size; 4853 } 4854 4855 if (*num_mids >= MAX_COMPOUND) { 4856 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4857 return -1; 4858 } 4859 bufs[*num_mids] = buf; 4860 mids[(*num_mids)++] = mid_entry; 4861 4862 if (mid_entry && mid_entry->handle) 4863 ret = mid_entry->handle(server, mid_entry); 4864 else 4865 ret = cifs_handle_standard(server, mid_entry); 4866 4867 if (ret == 0 && next_cmd) { 4868 pdu_length -= next_cmd; 4869 server->large_buf = next_is_large; 4870 if (next_is_large) 4871 server->bigbuf = buf = next_buffer; 4872 else 4873 server->smallbuf = buf = next_buffer; 4874 goto one_more; 4875 } else if (ret != 0) { 4876 /* 4877 * ret != 0 here means that we didn't get to handle_mid() thus 4878 * server->smallbuf and server->bigbuf are still valid. We need 4879 * to free next_buffer because it is not going to be used 4880 * anywhere. 4881 */ 4882 if (next_is_large) 4883 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4884 else 4885 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4886 } 4887 4888 return ret; 4889 } 4890 4891 static int 4892 smb3_receive_transform(struct TCP_Server_Info *server, 4893 struct mid_q_entry **mids, char **bufs, int *num_mids) 4894 { 4895 char *buf = server->smallbuf; 4896 unsigned int pdu_length = server->pdu_size; 4897 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4898 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4899 4900 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4901 sizeof(struct smb2_hdr)) { 4902 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4903 pdu_length); 4904 cifs_reconnect(server, true); 4905 return -ECONNABORTED; 4906 } 4907 4908 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4909 cifs_server_dbg(VFS, "Transform message is broken\n"); 4910 cifs_reconnect(server, true); 4911 return -ECONNABORTED; 4912 } 4913 4914 /* TODO: add support for compounds containing READ. */ 4915 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4916 return receive_encrypted_read(server, &mids[0], num_mids); 4917 } 4918 4919 return receive_encrypted_standard(server, mids, bufs, num_mids); 4920 } 4921 4922 int 4923 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4924 { 4925 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4926 4927 return handle_read_data(server, mid, buf, server->pdu_size, 4928 NULL, 0, false); 4929 } 4930 4931 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4932 unsigned int *noff) 4933 { 4934 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4935 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 4936 4937 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 4938 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 4939 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 4940 return -EINVAL; 4941 } else { 4942 *noff = le32_to_cpu(hdr->NextCommand); 4943 } 4944 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 4945 return -EINVAL; 4946 return 0; 4947 } 4948 4949 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 4950 struct dentry *dentry, struct cifs_tcon *tcon, 4951 const char *full_path, umode_t mode, dev_t dev) 4952 { 4953 struct cifs_open_info_data buf = {}; 4954 struct TCP_Server_Info *server = tcon->ses->server; 4955 struct cifs_open_parms oparms; 4956 struct cifs_io_parms io_parms = {}; 4957 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 4958 struct cifs_fid fid; 4959 unsigned int bytes_written; 4960 struct win_dev *pdev; 4961 struct kvec iov[2]; 4962 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 4963 int rc; 4964 4965 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 4966 return -EPERM; 4967 4968 oparms = (struct cifs_open_parms) { 4969 .tcon = tcon, 4970 .cifs_sb = cifs_sb, 4971 .desired_access = GENERIC_WRITE, 4972 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 4973 CREATE_OPTION_SPECIAL), 4974 .disposition = FILE_CREATE, 4975 .path = full_path, 4976 .fid = &fid, 4977 }; 4978 4979 rc = server->ops->open(xid, &oparms, &oplock, &buf); 4980 if (rc) 4981 return rc; 4982 4983 /* 4984 * BB Do not bother to decode buf since no local inode yet to put 4985 * timestamps in, but we can reuse it safely. 4986 */ 4987 pdev = (struct win_dev *)&buf.fi; 4988 io_parms.pid = current->tgid; 4989 io_parms.tcon = tcon; 4990 io_parms.length = sizeof(*pdev); 4991 iov[1].iov_base = pdev; 4992 iov[1].iov_len = sizeof(*pdev); 4993 if (S_ISCHR(mode)) { 4994 memcpy(pdev->type, "IntxCHR", 8); 4995 pdev->major = cpu_to_le64(MAJOR(dev)); 4996 pdev->minor = cpu_to_le64(MINOR(dev)); 4997 } else if (S_ISBLK(mode)) { 4998 memcpy(pdev->type, "IntxBLK", 8); 4999 pdev->major = cpu_to_le64(MAJOR(dev)); 5000 pdev->minor = cpu_to_le64(MINOR(dev)); 5001 } else if (S_ISFIFO(mode)) { 5002 memcpy(pdev->type, "LnxFIFO", 8); 5003 } 5004 5005 rc = server->ops->sync_write(xid, &fid, &io_parms, 5006 &bytes_written, iov, 1); 5007 server->ops->close(xid, tcon, &fid); 5008 d_drop(dentry); 5009 /* FIXME: add code here to set EAs */ 5010 cifs_free_open_info(&buf); 5011 return rc; 5012 } 5013 5014 static inline u64 mode_nfs_type(mode_t mode) 5015 { 5016 switch (mode & S_IFMT) { 5017 case S_IFBLK: return NFS_SPECFILE_BLK; 5018 case S_IFCHR: return NFS_SPECFILE_CHR; 5019 case S_IFIFO: return NFS_SPECFILE_FIFO; 5020 case S_IFSOCK: return NFS_SPECFILE_SOCK; 5021 } 5022 return 0; 5023 } 5024 5025 static int nfs_set_reparse_buf(struct reparse_posix_data *buf, 5026 mode_t mode, dev_t dev, 5027 struct kvec *iov) 5028 { 5029 u64 type; 5030 u16 len, dlen; 5031 5032 len = sizeof(*buf); 5033 5034 switch ((type = mode_nfs_type(mode))) { 5035 case NFS_SPECFILE_BLK: 5036 case NFS_SPECFILE_CHR: 5037 dlen = sizeof(__le64); 5038 break; 5039 case NFS_SPECFILE_FIFO: 5040 case NFS_SPECFILE_SOCK: 5041 dlen = 0; 5042 break; 5043 default: 5044 return -EOPNOTSUPP; 5045 } 5046 5047 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS); 5048 buf->Reserved = 0; 5049 buf->InodeType = cpu_to_le64(type); 5050 buf->ReparseDataLength = cpu_to_le16(len + dlen - 5051 sizeof(struct reparse_data_buffer)); 5052 *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) | 5053 MINOR(dev)); 5054 iov->iov_base = buf; 5055 iov->iov_len = len + dlen; 5056 return 0; 5057 } 5058 5059 static int nfs_make_node(unsigned int xid, struct inode *inode, 5060 struct dentry *dentry, struct cifs_tcon *tcon, 5061 const char *full_path, umode_t mode, dev_t dev) 5062 { 5063 struct cifs_open_info_data data; 5064 struct reparse_posix_data *p; 5065 struct inode *new; 5066 struct kvec iov; 5067 __u8 buf[sizeof(*p) + sizeof(__le64)]; 5068 int rc; 5069 5070 p = (struct reparse_posix_data *)buf; 5071 rc = nfs_set_reparse_buf(p, mode, dev, &iov); 5072 if (rc) 5073 return rc; 5074 5075 data = (struct cifs_open_info_data) { 5076 .reparse_point = true, 5077 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, }, 5078 }; 5079 5080 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5081 tcon, full_path, &iov); 5082 if (!IS_ERR(new)) 5083 d_instantiate(dentry, new); 5084 else 5085 rc = PTR_ERR(new); 5086 cifs_free_open_info(&data); 5087 return rc; 5088 } 5089 5090 static int smb2_create_reparse_symlink(const unsigned int xid, 5091 struct inode *inode, 5092 struct dentry *dentry, 5093 struct cifs_tcon *tcon, 5094 const char *full_path, 5095 const char *symname) 5096 { 5097 struct reparse_symlink_data_buffer *buf = NULL; 5098 struct cifs_open_info_data data; 5099 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5100 struct inode *new; 5101 struct kvec iov; 5102 __le16 *path; 5103 char *sym; 5104 u16 len, plen; 5105 int rc = 0; 5106 5107 sym = kstrdup(symname, GFP_KERNEL); 5108 if (!sym) 5109 return -ENOMEM; 5110 5111 data = (struct cifs_open_info_data) { 5112 .reparse_point = true, 5113 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, }, 5114 .symlink_target = sym, 5115 }; 5116 5117 path = cifs_convert_path_to_utf16(symname, cifs_sb); 5118 if (!path) { 5119 rc = -ENOMEM; 5120 goto out; 5121 } 5122 5123 plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX); 5124 len = sizeof(*buf) + plen * 2; 5125 buf = kzalloc(len, GFP_KERNEL); 5126 if (!buf) { 5127 rc = -ENOMEM; 5128 goto out; 5129 } 5130 5131 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK); 5132 buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer)); 5133 buf->SubstituteNameOffset = cpu_to_le16(plen); 5134 buf->SubstituteNameLength = cpu_to_le16(plen); 5135 memcpy(&buf->PathBuffer[plen], path, plen); 5136 buf->PrintNameOffset = 0; 5137 buf->PrintNameLength = cpu_to_le16(plen); 5138 memcpy(buf->PathBuffer, path, plen); 5139 buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0); 5140 5141 iov.iov_base = buf; 5142 iov.iov_len = len; 5143 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5144 tcon, full_path, &iov); 5145 if (!IS_ERR(new)) 5146 d_instantiate(dentry, new); 5147 else 5148 rc = PTR_ERR(new); 5149 out: 5150 kfree(path); 5151 cifs_free_open_info(&data); 5152 kfree(buf); 5153 return rc; 5154 } 5155 5156 static int smb2_make_node(unsigned int xid, struct inode *inode, 5157 struct dentry *dentry, struct cifs_tcon *tcon, 5158 const char *full_path, umode_t mode, dev_t dev) 5159 { 5160 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5161 int rc; 5162 5163 /* 5164 * Check if mounted with mount parm 'sfu' mount parm. 5165 * SFU emulation should work with all servers, but only 5166 * supports block and char device (no socket & fifo), 5167 * and was used by default in earlier versions of Windows 5168 */ 5169 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5170 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5171 full_path, mode, dev); 5172 } else { 5173 rc = nfs_make_node(xid, inode, dentry, tcon, 5174 full_path, mode, dev); 5175 } 5176 return rc; 5177 } 5178 5179 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5180 struct smb_version_operations smb20_operations = { 5181 .compare_fids = smb2_compare_fids, 5182 .setup_request = smb2_setup_request, 5183 .setup_async_request = smb2_setup_async_request, 5184 .check_receive = smb2_check_receive, 5185 .add_credits = smb2_add_credits, 5186 .set_credits = smb2_set_credits, 5187 .get_credits_field = smb2_get_credits_field, 5188 .get_credits = smb2_get_credits, 5189 .wait_mtu_credits = cifs_wait_mtu_credits, 5190 .get_next_mid = smb2_get_next_mid, 5191 .revert_current_mid = smb2_revert_current_mid, 5192 .read_data_offset = smb2_read_data_offset, 5193 .read_data_length = smb2_read_data_length, 5194 .map_error = map_smb2_to_linux_error, 5195 .find_mid = smb2_find_mid, 5196 .check_message = smb2_check_message, 5197 .dump_detail = smb2_dump_detail, 5198 .clear_stats = smb2_clear_stats, 5199 .print_stats = smb2_print_stats, 5200 .is_oplock_break = smb2_is_valid_oplock_break, 5201 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5202 .downgrade_oplock = smb2_downgrade_oplock, 5203 .need_neg = smb2_need_neg, 5204 .negotiate = smb2_negotiate, 5205 .negotiate_wsize = smb2_negotiate_wsize, 5206 .negotiate_rsize = smb2_negotiate_rsize, 5207 .sess_setup = SMB2_sess_setup, 5208 .logoff = SMB2_logoff, 5209 .tree_connect = SMB2_tcon, 5210 .tree_disconnect = SMB2_tdis, 5211 .qfs_tcon = smb2_qfs_tcon, 5212 .is_path_accessible = smb2_is_path_accessible, 5213 .can_echo = smb2_can_echo, 5214 .echo = SMB2_echo, 5215 .query_path_info = smb2_query_path_info, 5216 .query_reparse_point = smb2_query_reparse_point, 5217 .get_srv_inum = smb2_get_srv_inum, 5218 .query_file_info = smb2_query_file_info, 5219 .set_path_size = smb2_set_path_size, 5220 .set_file_size = smb2_set_file_size, 5221 .set_file_info = smb2_set_file_info, 5222 .set_compression = smb2_set_compression, 5223 .mkdir = smb2_mkdir, 5224 .mkdir_setinfo = smb2_mkdir_setinfo, 5225 .rmdir = smb2_rmdir, 5226 .unlink = smb2_unlink, 5227 .rename = smb2_rename_path, 5228 .create_hardlink = smb2_create_hardlink, 5229 .parse_reparse_point = smb2_parse_reparse_point, 5230 .query_mf_symlink = smb3_query_mf_symlink, 5231 .create_mf_symlink = smb3_create_mf_symlink, 5232 .create_reparse_symlink = smb2_create_reparse_symlink, 5233 .open = smb2_open_file, 5234 .set_fid = smb2_set_fid, 5235 .close = smb2_close_file, 5236 .flush = smb2_flush_file, 5237 .async_readv = smb2_async_readv, 5238 .async_writev = smb2_async_writev, 5239 .sync_read = smb2_sync_read, 5240 .sync_write = smb2_sync_write, 5241 .query_dir_first = smb2_query_dir_first, 5242 .query_dir_next = smb2_query_dir_next, 5243 .close_dir = smb2_close_dir, 5244 .calc_smb_size = smb2_calc_size, 5245 .is_status_pending = smb2_is_status_pending, 5246 .is_session_expired = smb2_is_session_expired, 5247 .oplock_response = smb2_oplock_response, 5248 .queryfs = smb2_queryfs, 5249 .mand_lock = smb2_mand_lock, 5250 .mand_unlock_range = smb2_unlock_range, 5251 .push_mand_locks = smb2_push_mandatory_locks, 5252 .get_lease_key = smb2_get_lease_key, 5253 .set_lease_key = smb2_set_lease_key, 5254 .new_lease_key = smb2_new_lease_key, 5255 .calc_signature = smb2_calc_signature, 5256 .is_read_op = smb2_is_read_op, 5257 .set_oplock_level = smb2_set_oplock_level, 5258 .create_lease_buf = smb2_create_lease_buf, 5259 .parse_lease_buf = smb2_parse_lease_buf, 5260 .copychunk_range = smb2_copychunk_range, 5261 .wp_retry_size = smb2_wp_retry_size, 5262 .dir_needs_close = smb2_dir_needs_close, 5263 .get_dfs_refer = smb2_get_dfs_refer, 5264 .select_sectype = smb2_select_sectype, 5265 #ifdef CONFIG_CIFS_XATTR 5266 .query_all_EAs = smb2_query_eas, 5267 .set_EA = smb2_set_ea, 5268 #endif /* CIFS_XATTR */ 5269 .get_acl = get_smb2_acl, 5270 .get_acl_by_fid = get_smb2_acl_by_fid, 5271 .set_acl = set_smb2_acl, 5272 .next_header = smb2_next_header, 5273 .ioctl_query_info = smb2_ioctl_query_info, 5274 .make_node = smb2_make_node, 5275 .fiemap = smb3_fiemap, 5276 .llseek = smb3_llseek, 5277 .is_status_io_timeout = smb2_is_status_io_timeout, 5278 .is_network_name_deleted = smb2_is_network_name_deleted, 5279 }; 5280 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5281 5282 struct smb_version_operations smb21_operations = { 5283 .compare_fids = smb2_compare_fids, 5284 .setup_request = smb2_setup_request, 5285 .setup_async_request = smb2_setup_async_request, 5286 .check_receive = smb2_check_receive, 5287 .add_credits = smb2_add_credits, 5288 .set_credits = smb2_set_credits, 5289 .get_credits_field = smb2_get_credits_field, 5290 .get_credits = smb2_get_credits, 5291 .wait_mtu_credits = smb2_wait_mtu_credits, 5292 .adjust_credits = smb2_adjust_credits, 5293 .get_next_mid = smb2_get_next_mid, 5294 .revert_current_mid = smb2_revert_current_mid, 5295 .read_data_offset = smb2_read_data_offset, 5296 .read_data_length = smb2_read_data_length, 5297 .map_error = map_smb2_to_linux_error, 5298 .find_mid = smb2_find_mid, 5299 .check_message = smb2_check_message, 5300 .dump_detail = smb2_dump_detail, 5301 .clear_stats = smb2_clear_stats, 5302 .print_stats = smb2_print_stats, 5303 .is_oplock_break = smb2_is_valid_oplock_break, 5304 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5305 .downgrade_oplock = smb2_downgrade_oplock, 5306 .need_neg = smb2_need_neg, 5307 .negotiate = smb2_negotiate, 5308 .negotiate_wsize = smb2_negotiate_wsize, 5309 .negotiate_rsize = smb2_negotiate_rsize, 5310 .sess_setup = SMB2_sess_setup, 5311 .logoff = SMB2_logoff, 5312 .tree_connect = SMB2_tcon, 5313 .tree_disconnect = SMB2_tdis, 5314 .qfs_tcon = smb2_qfs_tcon, 5315 .is_path_accessible = smb2_is_path_accessible, 5316 .can_echo = smb2_can_echo, 5317 .echo = SMB2_echo, 5318 .query_path_info = smb2_query_path_info, 5319 .query_reparse_point = smb2_query_reparse_point, 5320 .get_srv_inum = smb2_get_srv_inum, 5321 .query_file_info = smb2_query_file_info, 5322 .set_path_size = smb2_set_path_size, 5323 .set_file_size = smb2_set_file_size, 5324 .set_file_info = smb2_set_file_info, 5325 .set_compression = smb2_set_compression, 5326 .mkdir = smb2_mkdir, 5327 .mkdir_setinfo = smb2_mkdir_setinfo, 5328 .rmdir = smb2_rmdir, 5329 .unlink = smb2_unlink, 5330 .rename = smb2_rename_path, 5331 .create_hardlink = smb2_create_hardlink, 5332 .parse_reparse_point = smb2_parse_reparse_point, 5333 .query_mf_symlink = smb3_query_mf_symlink, 5334 .create_mf_symlink = smb3_create_mf_symlink, 5335 .create_reparse_symlink = smb2_create_reparse_symlink, 5336 .open = smb2_open_file, 5337 .set_fid = smb2_set_fid, 5338 .close = smb2_close_file, 5339 .flush = smb2_flush_file, 5340 .async_readv = smb2_async_readv, 5341 .async_writev = smb2_async_writev, 5342 .sync_read = smb2_sync_read, 5343 .sync_write = smb2_sync_write, 5344 .query_dir_first = smb2_query_dir_first, 5345 .query_dir_next = smb2_query_dir_next, 5346 .close_dir = smb2_close_dir, 5347 .calc_smb_size = smb2_calc_size, 5348 .is_status_pending = smb2_is_status_pending, 5349 .is_session_expired = smb2_is_session_expired, 5350 .oplock_response = smb2_oplock_response, 5351 .queryfs = smb2_queryfs, 5352 .mand_lock = smb2_mand_lock, 5353 .mand_unlock_range = smb2_unlock_range, 5354 .push_mand_locks = smb2_push_mandatory_locks, 5355 .get_lease_key = smb2_get_lease_key, 5356 .set_lease_key = smb2_set_lease_key, 5357 .new_lease_key = smb2_new_lease_key, 5358 .calc_signature = smb2_calc_signature, 5359 .is_read_op = smb21_is_read_op, 5360 .set_oplock_level = smb21_set_oplock_level, 5361 .create_lease_buf = smb2_create_lease_buf, 5362 .parse_lease_buf = smb2_parse_lease_buf, 5363 .copychunk_range = smb2_copychunk_range, 5364 .wp_retry_size = smb2_wp_retry_size, 5365 .dir_needs_close = smb2_dir_needs_close, 5366 .enum_snapshots = smb3_enum_snapshots, 5367 .notify = smb3_notify, 5368 .get_dfs_refer = smb2_get_dfs_refer, 5369 .select_sectype = smb2_select_sectype, 5370 #ifdef CONFIG_CIFS_XATTR 5371 .query_all_EAs = smb2_query_eas, 5372 .set_EA = smb2_set_ea, 5373 #endif /* CIFS_XATTR */ 5374 .get_acl = get_smb2_acl, 5375 .get_acl_by_fid = get_smb2_acl_by_fid, 5376 .set_acl = set_smb2_acl, 5377 .next_header = smb2_next_header, 5378 .ioctl_query_info = smb2_ioctl_query_info, 5379 .make_node = smb2_make_node, 5380 .fiemap = smb3_fiemap, 5381 .llseek = smb3_llseek, 5382 .is_status_io_timeout = smb2_is_status_io_timeout, 5383 .is_network_name_deleted = smb2_is_network_name_deleted, 5384 }; 5385 5386 struct smb_version_operations smb30_operations = { 5387 .compare_fids = smb2_compare_fids, 5388 .setup_request = smb2_setup_request, 5389 .setup_async_request = smb2_setup_async_request, 5390 .check_receive = smb2_check_receive, 5391 .add_credits = smb2_add_credits, 5392 .set_credits = smb2_set_credits, 5393 .get_credits_field = smb2_get_credits_field, 5394 .get_credits = smb2_get_credits, 5395 .wait_mtu_credits = smb2_wait_mtu_credits, 5396 .adjust_credits = smb2_adjust_credits, 5397 .get_next_mid = smb2_get_next_mid, 5398 .revert_current_mid = smb2_revert_current_mid, 5399 .read_data_offset = smb2_read_data_offset, 5400 .read_data_length = smb2_read_data_length, 5401 .map_error = map_smb2_to_linux_error, 5402 .find_mid = smb2_find_mid, 5403 .check_message = smb2_check_message, 5404 .dump_detail = smb2_dump_detail, 5405 .clear_stats = smb2_clear_stats, 5406 .print_stats = smb2_print_stats, 5407 .dump_share_caps = smb2_dump_share_caps, 5408 .is_oplock_break = smb2_is_valid_oplock_break, 5409 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5410 .downgrade_oplock = smb3_downgrade_oplock, 5411 .need_neg = smb2_need_neg, 5412 .negotiate = smb2_negotiate, 5413 .negotiate_wsize = smb3_negotiate_wsize, 5414 .negotiate_rsize = smb3_negotiate_rsize, 5415 .sess_setup = SMB2_sess_setup, 5416 .logoff = SMB2_logoff, 5417 .tree_connect = SMB2_tcon, 5418 .tree_disconnect = SMB2_tdis, 5419 .qfs_tcon = smb3_qfs_tcon, 5420 .is_path_accessible = smb2_is_path_accessible, 5421 .can_echo = smb2_can_echo, 5422 .echo = SMB2_echo, 5423 .query_path_info = smb2_query_path_info, 5424 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5425 .query_reparse_point = smb2_query_reparse_point, 5426 .get_srv_inum = smb2_get_srv_inum, 5427 .query_file_info = smb2_query_file_info, 5428 .set_path_size = smb2_set_path_size, 5429 .set_file_size = smb2_set_file_size, 5430 .set_file_info = smb2_set_file_info, 5431 .set_compression = smb2_set_compression, 5432 .mkdir = smb2_mkdir, 5433 .mkdir_setinfo = smb2_mkdir_setinfo, 5434 .rmdir = smb2_rmdir, 5435 .unlink = smb2_unlink, 5436 .rename = smb2_rename_path, 5437 .create_hardlink = smb2_create_hardlink, 5438 .parse_reparse_point = smb2_parse_reparse_point, 5439 .query_mf_symlink = smb3_query_mf_symlink, 5440 .create_mf_symlink = smb3_create_mf_symlink, 5441 .create_reparse_symlink = smb2_create_reparse_symlink, 5442 .open = smb2_open_file, 5443 .set_fid = smb2_set_fid, 5444 .close = smb2_close_file, 5445 .close_getattr = smb2_close_getattr, 5446 .flush = smb2_flush_file, 5447 .async_readv = smb2_async_readv, 5448 .async_writev = smb2_async_writev, 5449 .sync_read = smb2_sync_read, 5450 .sync_write = smb2_sync_write, 5451 .query_dir_first = smb2_query_dir_first, 5452 .query_dir_next = smb2_query_dir_next, 5453 .close_dir = smb2_close_dir, 5454 .calc_smb_size = smb2_calc_size, 5455 .is_status_pending = smb2_is_status_pending, 5456 .is_session_expired = smb2_is_session_expired, 5457 .oplock_response = smb2_oplock_response, 5458 .queryfs = smb2_queryfs, 5459 .mand_lock = smb2_mand_lock, 5460 .mand_unlock_range = smb2_unlock_range, 5461 .push_mand_locks = smb2_push_mandatory_locks, 5462 .get_lease_key = smb2_get_lease_key, 5463 .set_lease_key = smb2_set_lease_key, 5464 .new_lease_key = smb2_new_lease_key, 5465 .generate_signingkey = generate_smb30signingkey, 5466 .calc_signature = smb3_calc_signature, 5467 .set_integrity = smb3_set_integrity, 5468 .is_read_op = smb21_is_read_op, 5469 .set_oplock_level = smb3_set_oplock_level, 5470 .create_lease_buf = smb3_create_lease_buf, 5471 .parse_lease_buf = smb3_parse_lease_buf, 5472 .copychunk_range = smb2_copychunk_range, 5473 .duplicate_extents = smb2_duplicate_extents, 5474 .validate_negotiate = smb3_validate_negotiate, 5475 .wp_retry_size = smb2_wp_retry_size, 5476 .dir_needs_close = smb2_dir_needs_close, 5477 .fallocate = smb3_fallocate, 5478 .enum_snapshots = smb3_enum_snapshots, 5479 .notify = smb3_notify, 5480 .init_transform_rq = smb3_init_transform_rq, 5481 .is_transform_hdr = smb3_is_transform_hdr, 5482 .receive_transform = smb3_receive_transform, 5483 .get_dfs_refer = smb2_get_dfs_refer, 5484 .select_sectype = smb2_select_sectype, 5485 #ifdef CONFIG_CIFS_XATTR 5486 .query_all_EAs = smb2_query_eas, 5487 .set_EA = smb2_set_ea, 5488 #endif /* CIFS_XATTR */ 5489 .get_acl = get_smb2_acl, 5490 .get_acl_by_fid = get_smb2_acl_by_fid, 5491 .set_acl = set_smb2_acl, 5492 .next_header = smb2_next_header, 5493 .ioctl_query_info = smb2_ioctl_query_info, 5494 .make_node = smb2_make_node, 5495 .fiemap = smb3_fiemap, 5496 .llseek = smb3_llseek, 5497 .is_status_io_timeout = smb2_is_status_io_timeout, 5498 .is_network_name_deleted = smb2_is_network_name_deleted, 5499 }; 5500 5501 struct smb_version_operations smb311_operations = { 5502 .compare_fids = smb2_compare_fids, 5503 .setup_request = smb2_setup_request, 5504 .setup_async_request = smb2_setup_async_request, 5505 .check_receive = smb2_check_receive, 5506 .add_credits = smb2_add_credits, 5507 .set_credits = smb2_set_credits, 5508 .get_credits_field = smb2_get_credits_field, 5509 .get_credits = smb2_get_credits, 5510 .wait_mtu_credits = smb2_wait_mtu_credits, 5511 .adjust_credits = smb2_adjust_credits, 5512 .get_next_mid = smb2_get_next_mid, 5513 .revert_current_mid = smb2_revert_current_mid, 5514 .read_data_offset = smb2_read_data_offset, 5515 .read_data_length = smb2_read_data_length, 5516 .map_error = map_smb2_to_linux_error, 5517 .find_mid = smb2_find_mid, 5518 .check_message = smb2_check_message, 5519 .dump_detail = smb2_dump_detail, 5520 .clear_stats = smb2_clear_stats, 5521 .print_stats = smb2_print_stats, 5522 .dump_share_caps = smb2_dump_share_caps, 5523 .is_oplock_break = smb2_is_valid_oplock_break, 5524 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5525 .downgrade_oplock = smb3_downgrade_oplock, 5526 .need_neg = smb2_need_neg, 5527 .negotiate = smb2_negotiate, 5528 .negotiate_wsize = smb3_negotiate_wsize, 5529 .negotiate_rsize = smb3_negotiate_rsize, 5530 .sess_setup = SMB2_sess_setup, 5531 .logoff = SMB2_logoff, 5532 .tree_connect = SMB2_tcon, 5533 .tree_disconnect = SMB2_tdis, 5534 .qfs_tcon = smb3_qfs_tcon, 5535 .is_path_accessible = smb2_is_path_accessible, 5536 .can_echo = smb2_can_echo, 5537 .echo = SMB2_echo, 5538 .query_path_info = smb2_query_path_info, 5539 .query_reparse_point = smb2_query_reparse_point, 5540 .get_srv_inum = smb2_get_srv_inum, 5541 .query_file_info = smb2_query_file_info, 5542 .set_path_size = smb2_set_path_size, 5543 .set_file_size = smb2_set_file_size, 5544 .set_file_info = smb2_set_file_info, 5545 .set_compression = smb2_set_compression, 5546 .mkdir = smb2_mkdir, 5547 .mkdir_setinfo = smb2_mkdir_setinfo, 5548 .posix_mkdir = smb311_posix_mkdir, 5549 .rmdir = smb2_rmdir, 5550 .unlink = smb2_unlink, 5551 .rename = smb2_rename_path, 5552 .create_hardlink = smb2_create_hardlink, 5553 .parse_reparse_point = smb2_parse_reparse_point, 5554 .query_mf_symlink = smb3_query_mf_symlink, 5555 .create_mf_symlink = smb3_create_mf_symlink, 5556 .create_reparse_symlink = smb2_create_reparse_symlink, 5557 .open = smb2_open_file, 5558 .set_fid = smb2_set_fid, 5559 .close = smb2_close_file, 5560 .close_getattr = smb2_close_getattr, 5561 .flush = smb2_flush_file, 5562 .async_readv = smb2_async_readv, 5563 .async_writev = smb2_async_writev, 5564 .sync_read = smb2_sync_read, 5565 .sync_write = smb2_sync_write, 5566 .query_dir_first = smb2_query_dir_first, 5567 .query_dir_next = smb2_query_dir_next, 5568 .close_dir = smb2_close_dir, 5569 .calc_smb_size = smb2_calc_size, 5570 .is_status_pending = smb2_is_status_pending, 5571 .is_session_expired = smb2_is_session_expired, 5572 .oplock_response = smb2_oplock_response, 5573 .queryfs = smb311_queryfs, 5574 .mand_lock = smb2_mand_lock, 5575 .mand_unlock_range = smb2_unlock_range, 5576 .push_mand_locks = smb2_push_mandatory_locks, 5577 .get_lease_key = smb2_get_lease_key, 5578 .set_lease_key = smb2_set_lease_key, 5579 .new_lease_key = smb2_new_lease_key, 5580 .generate_signingkey = generate_smb311signingkey, 5581 .calc_signature = smb3_calc_signature, 5582 .set_integrity = smb3_set_integrity, 5583 .is_read_op = smb21_is_read_op, 5584 .set_oplock_level = smb3_set_oplock_level, 5585 .create_lease_buf = smb3_create_lease_buf, 5586 .parse_lease_buf = smb3_parse_lease_buf, 5587 .copychunk_range = smb2_copychunk_range, 5588 .duplicate_extents = smb2_duplicate_extents, 5589 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5590 .wp_retry_size = smb2_wp_retry_size, 5591 .dir_needs_close = smb2_dir_needs_close, 5592 .fallocate = smb3_fallocate, 5593 .enum_snapshots = smb3_enum_snapshots, 5594 .notify = smb3_notify, 5595 .init_transform_rq = smb3_init_transform_rq, 5596 .is_transform_hdr = smb3_is_transform_hdr, 5597 .receive_transform = smb3_receive_transform, 5598 .get_dfs_refer = smb2_get_dfs_refer, 5599 .select_sectype = smb2_select_sectype, 5600 #ifdef CONFIG_CIFS_XATTR 5601 .query_all_EAs = smb2_query_eas, 5602 .set_EA = smb2_set_ea, 5603 #endif /* CIFS_XATTR */ 5604 .get_acl = get_smb2_acl, 5605 .get_acl_by_fid = get_smb2_acl_by_fid, 5606 .set_acl = set_smb2_acl, 5607 .next_header = smb2_next_header, 5608 .ioctl_query_info = smb2_ioctl_query_info, 5609 .make_node = smb2_make_node, 5610 .fiemap = smb3_fiemap, 5611 .llseek = smb3_llseek, 5612 .is_status_io_timeout = smb2_is_status_io_timeout, 5613 .is_network_name_deleted = smb2_is_network_name_deleted, 5614 }; 5615 5616 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5617 struct smb_version_values smb20_values = { 5618 .version_string = SMB20_VERSION_STRING, 5619 .protocol_id = SMB20_PROT_ID, 5620 .req_capabilities = 0, /* MBZ */ 5621 .large_lock_type = 0, 5622 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5623 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5624 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5625 .header_size = sizeof(struct smb2_hdr), 5626 .header_preamble_size = 0, 5627 .max_header_size = MAX_SMB2_HDR_SIZE, 5628 .read_rsp_size = sizeof(struct smb2_read_rsp), 5629 .lock_cmd = SMB2_LOCK, 5630 .cap_unix = 0, 5631 .cap_nt_find = SMB2_NT_FIND, 5632 .cap_large_files = SMB2_LARGE_FILES, 5633 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5634 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5635 .create_lease_size = sizeof(struct create_lease), 5636 }; 5637 #endif /* ALLOW_INSECURE_LEGACY */ 5638 5639 struct smb_version_values smb21_values = { 5640 .version_string = SMB21_VERSION_STRING, 5641 .protocol_id = SMB21_PROT_ID, 5642 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5643 .large_lock_type = 0, 5644 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5645 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5646 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5647 .header_size = sizeof(struct smb2_hdr), 5648 .header_preamble_size = 0, 5649 .max_header_size = MAX_SMB2_HDR_SIZE, 5650 .read_rsp_size = sizeof(struct smb2_read_rsp), 5651 .lock_cmd = SMB2_LOCK, 5652 .cap_unix = 0, 5653 .cap_nt_find = SMB2_NT_FIND, 5654 .cap_large_files = SMB2_LARGE_FILES, 5655 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5656 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5657 .create_lease_size = sizeof(struct create_lease), 5658 }; 5659 5660 struct smb_version_values smb3any_values = { 5661 .version_string = SMB3ANY_VERSION_STRING, 5662 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5663 .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, 5664 .large_lock_type = 0, 5665 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5666 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5667 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5668 .header_size = sizeof(struct smb2_hdr), 5669 .header_preamble_size = 0, 5670 .max_header_size = MAX_SMB2_HDR_SIZE, 5671 .read_rsp_size = sizeof(struct smb2_read_rsp), 5672 .lock_cmd = SMB2_LOCK, 5673 .cap_unix = 0, 5674 .cap_nt_find = SMB2_NT_FIND, 5675 .cap_large_files = SMB2_LARGE_FILES, 5676 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5677 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5678 .create_lease_size = sizeof(struct create_lease_v2), 5679 }; 5680 5681 struct smb_version_values smbdefault_values = { 5682 .version_string = SMBDEFAULT_VERSION_STRING, 5683 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5684 .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, 5685 .large_lock_type = 0, 5686 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5687 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5688 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5689 .header_size = sizeof(struct smb2_hdr), 5690 .header_preamble_size = 0, 5691 .max_header_size = MAX_SMB2_HDR_SIZE, 5692 .read_rsp_size = sizeof(struct smb2_read_rsp), 5693 .lock_cmd = SMB2_LOCK, 5694 .cap_unix = 0, 5695 .cap_nt_find = SMB2_NT_FIND, 5696 .cap_large_files = SMB2_LARGE_FILES, 5697 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5698 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5699 .create_lease_size = sizeof(struct create_lease_v2), 5700 }; 5701 5702 struct smb_version_values smb30_values = { 5703 .version_string = SMB30_VERSION_STRING, 5704 .protocol_id = SMB30_PROT_ID, 5705 .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, 5706 .large_lock_type = 0, 5707 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5708 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5709 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5710 .header_size = sizeof(struct smb2_hdr), 5711 .header_preamble_size = 0, 5712 .max_header_size = MAX_SMB2_HDR_SIZE, 5713 .read_rsp_size = sizeof(struct smb2_read_rsp), 5714 .lock_cmd = SMB2_LOCK, 5715 .cap_unix = 0, 5716 .cap_nt_find = SMB2_NT_FIND, 5717 .cap_large_files = SMB2_LARGE_FILES, 5718 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5719 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5720 .create_lease_size = sizeof(struct create_lease_v2), 5721 }; 5722 5723 struct smb_version_values smb302_values = { 5724 .version_string = SMB302_VERSION_STRING, 5725 .protocol_id = SMB302_PROT_ID, 5726 .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, 5727 .large_lock_type = 0, 5728 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5729 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5730 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5731 .header_size = sizeof(struct smb2_hdr), 5732 .header_preamble_size = 0, 5733 .max_header_size = MAX_SMB2_HDR_SIZE, 5734 .read_rsp_size = sizeof(struct smb2_read_rsp), 5735 .lock_cmd = SMB2_LOCK, 5736 .cap_unix = 0, 5737 .cap_nt_find = SMB2_NT_FIND, 5738 .cap_large_files = SMB2_LARGE_FILES, 5739 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5740 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5741 .create_lease_size = sizeof(struct create_lease_v2), 5742 }; 5743 5744 struct smb_version_values smb311_values = { 5745 .version_string = SMB311_VERSION_STRING, 5746 .protocol_id = SMB311_PROT_ID, 5747 .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, 5748 .large_lock_type = 0, 5749 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5750 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5751 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5752 .header_size = sizeof(struct smb2_hdr), 5753 .header_preamble_size = 0, 5754 .max_header_size = MAX_SMB2_HDR_SIZE, 5755 .read_rsp_size = sizeof(struct smb2_read_rsp), 5756 .lock_cmd = SMB2_LOCK, 5757 .cap_unix = 0, 5758 .cap_nt_find = SMB2_NT_FIND, 5759 .cap_large_files = SMB2_LARGE_FILES, 5760 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5761 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5762 .create_lease_size = sizeof(struct create_lease_v2), 5763 }; 5764