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