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 #include "reparse.h" 32 33 /* Change credits for different ops and return the total number of credits */ 34 static int 35 change_conf(struct TCP_Server_Info *server) 36 { 37 server->credits += server->echo_credits + server->oplock_credits; 38 if (server->credits > server->max_credits) 39 server->credits = server->max_credits; 40 server->oplock_credits = server->echo_credits = 0; 41 switch (server->credits) { 42 case 0: 43 return 0; 44 case 1: 45 server->echoes = false; 46 server->oplocks = false; 47 break; 48 case 2: 49 server->echoes = true; 50 server->oplocks = false; 51 server->echo_credits = 1; 52 break; 53 default: 54 server->echoes = true; 55 if (enable_oplocks) { 56 server->oplocks = true; 57 server->oplock_credits = 1; 58 } else 59 server->oplocks = false; 60 61 server->echo_credits = 1; 62 } 63 server->credits -= server->echo_credits + server->oplock_credits; 64 return server->credits + server->echo_credits + server->oplock_credits; 65 } 66 67 static void 68 smb2_add_credits(struct TCP_Server_Info *server, 69 const struct cifs_credits *credits, const int optype) 70 { 71 int *val, rc = -1; 72 int scredits, in_flight; 73 unsigned int add = credits->value; 74 unsigned int instance = credits->instance; 75 bool reconnect_detected = false; 76 bool reconnect_with_invalid_credits = false; 77 78 spin_lock(&server->req_lock); 79 val = server->ops->get_credits_field(server, optype); 80 81 /* eg found case where write overlapping reconnect messed up credits */ 82 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 83 reconnect_with_invalid_credits = true; 84 85 if ((instance == 0) || (instance == server->reconnect_instance)) 86 *val += add; 87 else 88 reconnect_detected = true; 89 90 if (*val > 65000) { 91 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 92 pr_warn_once("server overflowed SMB3 credits\n"); 93 trace_smb3_overflow_credits(server->CurrentMid, 94 server->conn_id, server->hostname, *val, 95 add, server->in_flight); 96 } 97 WARN_ON_ONCE(server->in_flight == 0); 98 server->in_flight--; 99 if (server->in_flight == 0 && 100 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 101 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 102 rc = change_conf(server); 103 /* 104 * Sometimes server returns 0 credits on oplock break ack - we need to 105 * rebalance credits in this case. 106 */ 107 else if (server->in_flight > 0 && server->oplock_credits == 0 && 108 server->oplocks) { 109 if (server->credits > 1) { 110 server->credits--; 111 server->oplock_credits++; 112 } 113 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 114 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 115 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 116 change_conf(server); 117 118 scredits = *val; 119 in_flight = server->in_flight; 120 spin_unlock(&server->req_lock); 121 wake_up(&server->request_q); 122 123 if (reconnect_detected) { 124 trace_smb3_reconnect_detected(server->CurrentMid, 125 server->conn_id, server->hostname, scredits, add, in_flight); 126 127 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 128 add, instance); 129 } 130 131 if (reconnect_with_invalid_credits) { 132 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 133 server->conn_id, server->hostname, scredits, add, in_flight); 134 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 135 optype, scredits, add); 136 } 137 138 spin_lock(&server->srv_lock); 139 if (server->tcpStatus == CifsNeedReconnect 140 || server->tcpStatus == CifsExiting) { 141 spin_unlock(&server->srv_lock); 142 return; 143 } 144 spin_unlock(&server->srv_lock); 145 146 switch (rc) { 147 case -1: 148 /* change_conf hasn't been executed */ 149 break; 150 case 0: 151 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 152 break; 153 case 1: 154 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 155 break; 156 case 2: 157 cifs_dbg(FYI, "disabling oplocks\n"); 158 break; 159 default: 160 /* change_conf rebalanced credits for different types */ 161 break; 162 } 163 164 trace_smb3_add_credits(server->CurrentMid, 165 server->conn_id, server->hostname, scredits, add, in_flight); 166 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 167 } 168 169 static void 170 smb2_set_credits(struct TCP_Server_Info *server, const int val) 171 { 172 int scredits, in_flight; 173 174 spin_lock(&server->req_lock); 175 server->credits = val; 176 if (val == 1) { 177 server->reconnect_instance++; 178 /* 179 * ChannelSequence updated for all channels in primary channel so that consistent 180 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 181 */ 182 if (SERVER_IS_CHAN(server)) 183 server->primary_server->channel_sequence_num++; 184 else 185 server->channel_sequence_num++; 186 } 187 scredits = server->credits; 188 in_flight = server->in_flight; 189 spin_unlock(&server->req_lock); 190 191 trace_smb3_set_credits(server->CurrentMid, 192 server->conn_id, server->hostname, scredits, val, in_flight); 193 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 194 195 /* don't log while holding the lock */ 196 if (val == 1) 197 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 198 } 199 200 static int * 201 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 202 { 203 switch (optype) { 204 case CIFS_ECHO_OP: 205 return &server->echo_credits; 206 case CIFS_OBREAK_OP: 207 return &server->oplock_credits; 208 default: 209 return &server->credits; 210 } 211 } 212 213 static unsigned int 214 smb2_get_credits(struct mid_q_entry *mid) 215 { 216 return mid->credits_received; 217 } 218 219 static int 220 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 221 unsigned int *num, struct cifs_credits *credits) 222 { 223 int rc = 0; 224 unsigned int scredits, in_flight; 225 226 spin_lock(&server->req_lock); 227 while (1) { 228 spin_unlock(&server->req_lock); 229 230 spin_lock(&server->srv_lock); 231 if (server->tcpStatus == CifsExiting) { 232 spin_unlock(&server->srv_lock); 233 return -ENOENT; 234 } 235 spin_unlock(&server->srv_lock); 236 237 spin_lock(&server->req_lock); 238 if (server->credits <= 0) { 239 spin_unlock(&server->req_lock); 240 cifs_num_waiters_inc(server); 241 rc = wait_event_killable(server->request_q, 242 has_credits(server, &server->credits, 1)); 243 cifs_num_waiters_dec(server); 244 if (rc) 245 return rc; 246 spin_lock(&server->req_lock); 247 } else { 248 scredits = server->credits; 249 /* can deadlock with reopen */ 250 if (scredits <= 8) { 251 *num = SMB2_MAX_BUFFER_SIZE; 252 credits->value = 0; 253 credits->instance = 0; 254 break; 255 } 256 257 /* leave some credits for reopen and other ops */ 258 scredits -= 8; 259 *num = min_t(unsigned int, size, 260 scredits * SMB2_MAX_BUFFER_SIZE); 261 262 credits->value = 263 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 264 credits->instance = server->reconnect_instance; 265 server->credits -= credits->value; 266 server->in_flight++; 267 if (server->in_flight > server->max_in_flight) 268 server->max_in_flight = server->in_flight; 269 break; 270 } 271 } 272 scredits = server->credits; 273 in_flight = server->in_flight; 274 spin_unlock(&server->req_lock); 275 276 trace_smb3_wait_credits(server->CurrentMid, 277 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 278 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 279 __func__, credits->value, scredits); 280 281 return rc; 282 } 283 284 static int 285 smb2_adjust_credits(struct TCP_Server_Info *server, 286 struct cifs_credits *credits, 287 const unsigned int payload_size) 288 { 289 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 290 int scredits, in_flight; 291 292 if (!credits->value || credits->value == new_val) 293 return 0; 294 295 if (credits->value < new_val) { 296 trace_smb3_too_many_credits(server->CurrentMid, 297 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 298 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 299 credits->value, new_val); 300 301 return -EOPNOTSUPP; 302 } 303 304 spin_lock(&server->req_lock); 305 306 if (server->reconnect_instance != credits->instance) { 307 scredits = server->credits; 308 in_flight = server->in_flight; 309 spin_unlock(&server->req_lock); 310 311 trace_smb3_reconnect_detected(server->CurrentMid, 312 server->conn_id, server->hostname, scredits, 313 credits->value - new_val, in_flight); 314 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 315 credits->value - new_val); 316 return -EAGAIN; 317 } 318 319 server->credits += credits->value - new_val; 320 scredits = server->credits; 321 in_flight = server->in_flight; 322 spin_unlock(&server->req_lock); 323 wake_up(&server->request_q); 324 325 trace_smb3_adj_credits(server->CurrentMid, 326 server->conn_id, server->hostname, scredits, 327 credits->value - new_val, in_flight); 328 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 329 __func__, credits->value - new_val, scredits); 330 331 credits->value = new_val; 332 333 return 0; 334 } 335 336 static __u64 337 smb2_get_next_mid(struct TCP_Server_Info *server) 338 { 339 __u64 mid; 340 /* for SMB2 we need the current value */ 341 spin_lock(&server->mid_lock); 342 mid = server->CurrentMid++; 343 spin_unlock(&server->mid_lock); 344 return mid; 345 } 346 347 static void 348 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 349 { 350 spin_lock(&server->mid_lock); 351 if (server->CurrentMid >= val) 352 server->CurrentMid -= val; 353 spin_unlock(&server->mid_lock); 354 } 355 356 static struct mid_q_entry * 357 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 358 { 359 struct mid_q_entry *mid; 360 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 361 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 362 363 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 364 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 365 return NULL; 366 } 367 368 spin_lock(&server->mid_lock); 369 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 370 if ((mid->mid == wire_mid) && 371 (mid->mid_state == MID_REQUEST_SUBMITTED) && 372 (mid->command == shdr->Command)) { 373 kref_get(&mid->refcount); 374 if (dequeue) { 375 list_del_init(&mid->qhead); 376 mid->mid_flags |= MID_DELETED; 377 } 378 spin_unlock(&server->mid_lock); 379 return mid; 380 } 381 } 382 spin_unlock(&server->mid_lock); 383 return NULL; 384 } 385 386 static struct mid_q_entry * 387 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 388 { 389 return __smb2_find_mid(server, buf, false); 390 } 391 392 static struct mid_q_entry * 393 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 394 { 395 return __smb2_find_mid(server, buf, true); 396 } 397 398 static void 399 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 400 { 401 #ifdef CONFIG_CIFS_DEBUG2 402 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 403 404 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 405 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 406 shdr->Id.SyncId.ProcessId); 407 if (!server->ops->check_message(buf, server->total_read, server)) { 408 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 409 server->ops->calc_smb_size(buf)); 410 } 411 #endif 412 } 413 414 static bool 415 smb2_need_neg(struct TCP_Server_Info *server) 416 { 417 return server->max_read == 0; 418 } 419 420 static int 421 smb2_negotiate(const unsigned int xid, 422 struct cifs_ses *ses, 423 struct TCP_Server_Info *server) 424 { 425 int rc; 426 427 spin_lock(&server->mid_lock); 428 server->CurrentMid = 0; 429 spin_unlock(&server->mid_lock); 430 rc = SMB2_negotiate(xid, ses, server); 431 /* BB we probably don't need to retry with modern servers */ 432 if (rc == -EAGAIN) 433 rc = -EHOSTDOWN; 434 return rc; 435 } 436 437 static unsigned int 438 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 439 { 440 struct TCP_Server_Info *server = tcon->ses->server; 441 unsigned int wsize; 442 443 /* start with specified wsize, or default */ 444 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 445 wsize = min_t(unsigned int, wsize, server->max_write); 446 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 447 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 448 449 return wsize; 450 } 451 452 static unsigned int 453 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 454 { 455 struct TCP_Server_Info *server = tcon->ses->server; 456 unsigned int wsize; 457 458 /* start with specified wsize, or default */ 459 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 460 wsize = min_t(unsigned int, wsize, server->max_write); 461 #ifdef CONFIG_CIFS_SMB_DIRECT 462 if (server->rdma) { 463 if (server->sign) 464 /* 465 * Account for SMB2 data transfer packet header and 466 * possible encryption header 467 */ 468 wsize = min_t(unsigned int, 469 wsize, 470 server->smbd_conn->max_fragmented_send_size - 471 SMB2_READWRITE_PDU_HEADER_SIZE - 472 sizeof(struct smb2_transform_hdr)); 473 else 474 wsize = min_t(unsigned int, 475 wsize, server->smbd_conn->max_readwrite_size); 476 } 477 #endif 478 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 479 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 480 481 return wsize; 482 } 483 484 static unsigned int 485 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 486 { 487 struct TCP_Server_Info *server = tcon->ses->server; 488 unsigned int rsize; 489 490 /* start with specified rsize, or default */ 491 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 492 rsize = min_t(unsigned int, rsize, server->max_read); 493 494 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 495 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 496 497 return rsize; 498 } 499 500 static unsigned int 501 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 502 { 503 struct TCP_Server_Info *server = tcon->ses->server; 504 unsigned int rsize; 505 506 /* start with specified rsize, or default */ 507 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 508 rsize = min_t(unsigned int, rsize, server->max_read); 509 #ifdef CONFIG_CIFS_SMB_DIRECT 510 if (server->rdma) { 511 if (server->sign) 512 /* 513 * Account for SMB2 data transfer packet header and 514 * possible encryption header 515 */ 516 rsize = min_t(unsigned int, 517 rsize, 518 server->smbd_conn->max_fragmented_recv_size - 519 SMB2_READWRITE_PDU_HEADER_SIZE - 520 sizeof(struct smb2_transform_hdr)); 521 else 522 rsize = min_t(unsigned int, 523 rsize, server->smbd_conn->max_readwrite_size); 524 } 525 #endif 526 527 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 528 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 529 530 return rsize; 531 } 532 533 /* 534 * compare two interfaces a and b 535 * return 0 if everything matches. 536 * return 1 if a is rdma capable, or rss capable, or has higher link speed 537 * return -1 otherwise. 538 */ 539 static int 540 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 541 { 542 int cmp_ret = 0; 543 544 WARN_ON(!a || !b); 545 if (a->rdma_capable == b->rdma_capable) { 546 if (a->rss_capable == b->rss_capable) { 547 if (a->speed == b->speed) { 548 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 549 (struct sockaddr *) &b->sockaddr); 550 if (!cmp_ret) 551 return 0; 552 else if (cmp_ret > 0) 553 return 1; 554 else 555 return -1; 556 } else if (a->speed > b->speed) 557 return 1; 558 else 559 return -1; 560 } else if (a->rss_capable > b->rss_capable) 561 return 1; 562 else 563 return -1; 564 } else if (a->rdma_capable > b->rdma_capable) 565 return 1; 566 else 567 return -1; 568 } 569 570 static int 571 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 572 size_t buf_len, struct cifs_ses *ses, bool in_mount) 573 { 574 struct network_interface_info_ioctl_rsp *p; 575 struct sockaddr_in *addr4; 576 struct sockaddr_in6 *addr6; 577 struct iface_info_ipv4 *p4; 578 struct iface_info_ipv6 *p6; 579 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 580 struct cifs_server_iface tmp_iface; 581 ssize_t bytes_left; 582 size_t next = 0; 583 int nb_iface = 0; 584 int rc = 0, ret = 0; 585 586 bytes_left = buf_len; 587 p = buf; 588 589 spin_lock(&ses->iface_lock); 590 /* do not query too frequently, this time with lock held */ 591 if (ses->iface_last_update && 592 time_before(jiffies, ses->iface_last_update + 593 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 594 spin_unlock(&ses->iface_lock); 595 return 0; 596 } 597 598 /* 599 * Go through iface_list and mark them as inactive 600 */ 601 list_for_each_entry_safe(iface, niface, &ses->iface_list, 602 iface_head) 603 iface->is_active = 0; 604 605 spin_unlock(&ses->iface_lock); 606 607 /* 608 * Samba server e.g. can return an empty interface list in some cases, 609 * which would only be a problem if we were requesting multichannel 610 */ 611 if (bytes_left == 0) { 612 /* avoid spamming logs every 10 minutes, so log only in mount */ 613 if ((ses->chan_max > 1) && in_mount) 614 cifs_dbg(VFS, 615 "multichannel not available\n" 616 "Empty network interface list returned by server %s\n", 617 ses->server->hostname); 618 rc = -EOPNOTSUPP; 619 ses->iface_last_update = jiffies; 620 goto out; 621 } 622 623 while (bytes_left >= (ssize_t)sizeof(*p)) { 624 memset(&tmp_iface, 0, sizeof(tmp_iface)); 625 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 626 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 627 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 628 629 switch (p->Family) { 630 /* 631 * The kernel and wire socket structures have the same 632 * layout and use network byte order but make the 633 * conversion explicit in case either one changes. 634 */ 635 case INTERNETWORK: 636 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 637 p4 = (struct iface_info_ipv4 *)p->Buffer; 638 addr4->sin_family = AF_INET; 639 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 640 641 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 642 addr4->sin_port = cpu_to_be16(CIFS_PORT); 643 644 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 645 &addr4->sin_addr); 646 break; 647 case INTERNETWORKV6: 648 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 649 p6 = (struct iface_info_ipv6 *)p->Buffer; 650 addr6->sin6_family = AF_INET6; 651 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 652 653 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 654 addr6->sin6_flowinfo = 0; 655 addr6->sin6_scope_id = 0; 656 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 657 658 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 659 &addr6->sin6_addr); 660 break; 661 default: 662 cifs_dbg(VFS, 663 "%s: skipping unsupported socket family\n", 664 __func__); 665 goto next_iface; 666 } 667 668 /* 669 * The iface_list is assumed to be sorted by speed. 670 * Check if the new interface exists in that list. 671 * NEVER change iface. it could be in use. 672 * Add a new one instead 673 */ 674 spin_lock(&ses->iface_lock); 675 list_for_each_entry_safe(iface, niface, &ses->iface_list, 676 iface_head) { 677 ret = iface_cmp(iface, &tmp_iface); 678 if (!ret) { 679 iface->is_active = 1; 680 spin_unlock(&ses->iface_lock); 681 goto next_iface; 682 } else if (ret < 0) { 683 /* all remaining ifaces are slower */ 684 kref_get(&iface->refcount); 685 break; 686 } 687 } 688 spin_unlock(&ses->iface_lock); 689 690 /* no match. insert the entry in the list */ 691 info = kmalloc(sizeof(struct cifs_server_iface), 692 GFP_KERNEL); 693 if (!info) { 694 rc = -ENOMEM; 695 goto out; 696 } 697 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 698 699 /* add this new entry to the list */ 700 kref_init(&info->refcount); 701 info->is_active = 1; 702 703 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 704 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 705 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 706 le32_to_cpu(p->Capability)); 707 708 spin_lock(&ses->iface_lock); 709 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 710 list_add_tail(&info->iface_head, &iface->iface_head); 711 kref_put(&iface->refcount, release_iface); 712 } else 713 list_add_tail(&info->iface_head, &ses->iface_list); 714 715 ses->iface_count++; 716 spin_unlock(&ses->iface_lock); 717 next_iface: 718 nb_iface++; 719 next = le32_to_cpu(p->Next); 720 if (!next) { 721 bytes_left -= sizeof(*p); 722 break; 723 } 724 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 725 bytes_left -= next; 726 } 727 728 if (!nb_iface) { 729 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 730 rc = -EINVAL; 731 goto out; 732 } 733 734 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 735 if ((bytes_left > 8) || p->Next) 736 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 737 738 ses->iface_last_update = jiffies; 739 740 out: 741 /* 742 * Go through the list again and put the inactive entries 743 */ 744 spin_lock(&ses->iface_lock); 745 list_for_each_entry_safe(iface, niface, &ses->iface_list, 746 iface_head) { 747 if (!iface->is_active) { 748 list_del(&iface->iface_head); 749 kref_put(&iface->refcount, release_iface); 750 ses->iface_count--; 751 } 752 } 753 spin_unlock(&ses->iface_lock); 754 755 return rc; 756 } 757 758 int 759 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 760 { 761 int rc; 762 unsigned int ret_data_len = 0; 763 struct network_interface_info_ioctl_rsp *out_buf = NULL; 764 struct cifs_ses *ses = tcon->ses; 765 struct TCP_Server_Info *pserver; 766 767 /* do not query too frequently */ 768 if (ses->iface_last_update && 769 time_before(jiffies, ses->iface_last_update + 770 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 771 return 0; 772 773 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 774 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 775 NULL /* no data input */, 0 /* no data input */, 776 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 777 if (rc == -EOPNOTSUPP) { 778 cifs_dbg(FYI, 779 "server does not support query network interfaces\n"); 780 ret_data_len = 0; 781 } else if (rc != 0) { 782 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 783 goto out; 784 } 785 786 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 787 if (rc) 788 goto out; 789 790 /* check if iface is still active */ 791 spin_lock(&ses->chan_lock); 792 pserver = ses->chans[0].server; 793 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 794 spin_unlock(&ses->chan_lock); 795 cifs_chan_update_iface(ses, pserver); 796 spin_lock(&ses->chan_lock); 797 } 798 spin_unlock(&ses->chan_lock); 799 800 out: 801 kfree(out_buf); 802 return rc; 803 } 804 805 static void 806 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 807 struct cifs_sb_info *cifs_sb) 808 { 809 int rc; 810 __le16 srch_path = 0; /* Null - open root of share */ 811 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 812 struct cifs_open_parms oparms; 813 struct cifs_fid fid; 814 struct cached_fid *cfid = NULL; 815 816 oparms = (struct cifs_open_parms) { 817 .tcon = tcon, 818 .path = "", 819 .desired_access = FILE_READ_ATTRIBUTES, 820 .disposition = FILE_OPEN, 821 .create_options = cifs_create_options(cifs_sb, 0), 822 .fid = &fid, 823 }; 824 825 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 826 if (rc == 0) 827 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 828 else 829 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 830 NULL, NULL); 831 if (rc) 832 return; 833 834 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 835 836 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 837 FS_ATTRIBUTE_INFORMATION); 838 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 839 FS_DEVICE_INFORMATION); 840 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 841 FS_VOLUME_INFORMATION); 842 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 843 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 844 if (cfid == NULL) 845 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 846 else 847 close_cached_dir(cfid); 848 } 849 850 static void 851 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 852 struct cifs_sb_info *cifs_sb) 853 { 854 int rc; 855 __le16 srch_path = 0; /* Null - open root of share */ 856 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 857 struct cifs_open_parms oparms; 858 struct cifs_fid fid; 859 860 oparms = (struct cifs_open_parms) { 861 .tcon = tcon, 862 .path = "", 863 .desired_access = FILE_READ_ATTRIBUTES, 864 .disposition = FILE_OPEN, 865 .create_options = cifs_create_options(cifs_sb, 0), 866 .fid = &fid, 867 }; 868 869 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 870 NULL, NULL); 871 if (rc) 872 return; 873 874 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 875 FS_ATTRIBUTE_INFORMATION); 876 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 877 FS_DEVICE_INFORMATION); 878 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 879 } 880 881 static int 882 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 883 struct cifs_sb_info *cifs_sb, const char *full_path) 884 { 885 __le16 *utf16_path; 886 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 887 int err_buftype = CIFS_NO_BUFFER; 888 struct cifs_open_parms oparms; 889 struct kvec err_iov = {}; 890 struct cifs_fid fid; 891 struct cached_fid *cfid; 892 bool islink; 893 int rc, rc2; 894 895 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 896 if (!rc) { 897 if (cfid->has_lease) { 898 close_cached_dir(cfid); 899 return 0; 900 } 901 close_cached_dir(cfid); 902 } 903 904 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 905 if (!utf16_path) 906 return -ENOMEM; 907 908 oparms = (struct cifs_open_parms) { 909 .tcon = tcon, 910 .path = full_path, 911 .desired_access = FILE_READ_ATTRIBUTES, 912 .disposition = FILE_OPEN, 913 .create_options = cifs_create_options(cifs_sb, 0), 914 .fid = &fid, 915 }; 916 917 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 918 &err_iov, &err_buftype); 919 if (rc) { 920 struct smb2_hdr *hdr = err_iov.iov_base; 921 922 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 923 goto out; 924 925 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 926 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 927 full_path, &islink); 928 if (rc2) { 929 rc = rc2; 930 goto out; 931 } 932 if (islink) 933 rc = -EREMOTE; 934 } 935 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 936 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 937 rc = -EOPNOTSUPP; 938 goto out; 939 } 940 941 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 942 943 out: 944 free_rsp_buf(err_buftype, err_iov.iov_base); 945 kfree(utf16_path); 946 return rc; 947 } 948 949 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 950 struct cifs_sb_info *cifs_sb, const char *full_path, 951 u64 *uniqueid, struct cifs_open_info_data *data) 952 { 953 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 954 return 0; 955 } 956 957 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 958 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 959 { 960 struct cifs_fid *fid = &cfile->fid; 961 962 if (cfile->symlink_target) { 963 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 964 if (!data->symlink_target) 965 return -ENOMEM; 966 } 967 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 968 } 969 970 #ifdef CONFIG_CIFS_XATTR 971 static ssize_t 972 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 973 struct smb2_file_full_ea_info *src, size_t src_size, 974 const unsigned char *ea_name) 975 { 976 int rc = 0; 977 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 978 char *name, *value; 979 size_t buf_size = dst_size; 980 size_t name_len, value_len, user_name_len; 981 982 while (src_size > 0) { 983 name_len = (size_t)src->ea_name_length; 984 value_len = (size_t)le16_to_cpu(src->ea_value_length); 985 986 if (name_len == 0) 987 break; 988 989 if (src_size < 8 + name_len + 1 + value_len) { 990 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 991 rc = -EIO; 992 goto out; 993 } 994 995 name = &src->ea_data[0]; 996 value = &src->ea_data[src->ea_name_length + 1]; 997 998 if (ea_name) { 999 if (ea_name_len == name_len && 1000 memcmp(ea_name, name, name_len) == 0) { 1001 rc = value_len; 1002 if (dst_size == 0) 1003 goto out; 1004 if (dst_size < value_len) { 1005 rc = -ERANGE; 1006 goto out; 1007 } 1008 memcpy(dst, value, value_len); 1009 goto out; 1010 } 1011 } else { 1012 /* 'user.' plus a terminating null */ 1013 user_name_len = 5 + 1 + name_len; 1014 1015 if (buf_size == 0) { 1016 /* skip copy - calc size only */ 1017 rc += user_name_len; 1018 } else if (dst_size >= user_name_len) { 1019 dst_size -= user_name_len; 1020 memcpy(dst, "user.", 5); 1021 dst += 5; 1022 memcpy(dst, src->ea_data, name_len); 1023 dst += name_len; 1024 *dst = 0; 1025 ++dst; 1026 rc += user_name_len; 1027 } else { 1028 /* stop before overrun buffer */ 1029 rc = -ERANGE; 1030 break; 1031 } 1032 } 1033 1034 if (!src->next_entry_offset) 1035 break; 1036 1037 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1038 /* stop before overrun buffer */ 1039 rc = -ERANGE; 1040 break; 1041 } 1042 src_size -= le32_to_cpu(src->next_entry_offset); 1043 src = (void *)((char *)src + 1044 le32_to_cpu(src->next_entry_offset)); 1045 } 1046 1047 /* didn't find the named attribute */ 1048 if (ea_name) 1049 rc = -ENODATA; 1050 1051 out: 1052 return (ssize_t)rc; 1053 } 1054 1055 static ssize_t 1056 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1057 const unsigned char *path, const unsigned char *ea_name, 1058 char *ea_data, size_t buf_size, 1059 struct cifs_sb_info *cifs_sb) 1060 { 1061 int rc; 1062 struct kvec rsp_iov = {NULL, 0}; 1063 int buftype = CIFS_NO_BUFFER; 1064 struct smb2_query_info_rsp *rsp; 1065 struct smb2_file_full_ea_info *info = NULL; 1066 1067 rc = smb2_query_info_compound(xid, tcon, path, 1068 FILE_READ_EA, 1069 FILE_FULL_EA_INFORMATION, 1070 SMB2_O_INFO_FILE, 1071 CIFSMaxBufSize - 1072 MAX_SMB2_CREATE_RESPONSE_SIZE - 1073 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1074 &rsp_iov, &buftype, cifs_sb); 1075 if (rc) { 1076 /* 1077 * If ea_name is NULL (listxattr) and there are no EAs, 1078 * return 0 as it's not an error. Otherwise, the specified 1079 * ea_name was not found. 1080 */ 1081 if (!ea_name && rc == -ENODATA) 1082 rc = 0; 1083 goto qeas_exit; 1084 } 1085 1086 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1087 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1088 le32_to_cpu(rsp->OutputBufferLength), 1089 &rsp_iov, 1090 sizeof(struct smb2_file_full_ea_info)); 1091 if (rc) 1092 goto qeas_exit; 1093 1094 info = (struct smb2_file_full_ea_info *)( 1095 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1096 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1097 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1098 1099 qeas_exit: 1100 free_rsp_buf(buftype, rsp_iov.iov_base); 1101 return rc; 1102 } 1103 1104 static int 1105 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1106 const char *path, const char *ea_name, const void *ea_value, 1107 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1108 struct cifs_sb_info *cifs_sb) 1109 { 1110 struct smb2_compound_vars *vars; 1111 struct cifs_ses *ses = tcon->ses; 1112 struct TCP_Server_Info *server; 1113 struct smb_rqst *rqst; 1114 struct kvec *rsp_iov; 1115 __le16 *utf16_path = NULL; 1116 int ea_name_len = strlen(ea_name); 1117 int flags = CIFS_CP_CREATE_CLOSE_OP; 1118 int len; 1119 int resp_buftype[3]; 1120 struct cifs_open_parms oparms; 1121 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1122 struct cifs_fid fid; 1123 unsigned int size[1]; 1124 void *data[1]; 1125 struct smb2_file_full_ea_info *ea = NULL; 1126 struct smb2_query_info_rsp *rsp; 1127 int rc, used_len = 0; 1128 int retries = 0, cur_sleep = 1; 1129 1130 replay_again: 1131 /* reinitialize for possible replay */ 1132 flags = CIFS_CP_CREATE_CLOSE_OP; 1133 oplock = SMB2_OPLOCK_LEVEL_NONE; 1134 server = cifs_pick_channel(ses); 1135 1136 if (smb3_encryption_required(tcon)) 1137 flags |= CIFS_TRANSFORM_REQ; 1138 1139 if (ea_name_len > 255) 1140 return -EINVAL; 1141 1142 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1143 if (!utf16_path) 1144 return -ENOMEM; 1145 1146 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1147 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1148 if (!vars) { 1149 rc = -ENOMEM; 1150 goto out_free_path; 1151 } 1152 rqst = vars->rqst; 1153 rsp_iov = vars->rsp_iov; 1154 1155 if (ses->server->ops->query_all_EAs) { 1156 if (!ea_value) { 1157 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1158 ea_name, NULL, 0, 1159 cifs_sb); 1160 if (rc == -ENODATA) 1161 goto sea_exit; 1162 } else { 1163 /* If we are adding a attribute we should first check 1164 * if there will be enough space available to store 1165 * the new EA. If not we should not add it since we 1166 * would not be able to even read the EAs back. 1167 */ 1168 rc = smb2_query_info_compound(xid, tcon, path, 1169 FILE_READ_EA, 1170 FILE_FULL_EA_INFORMATION, 1171 SMB2_O_INFO_FILE, 1172 CIFSMaxBufSize - 1173 MAX_SMB2_CREATE_RESPONSE_SIZE - 1174 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1175 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1176 if (rc == 0) { 1177 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1178 used_len = le32_to_cpu(rsp->OutputBufferLength); 1179 } 1180 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1181 resp_buftype[1] = CIFS_NO_BUFFER; 1182 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1183 rc = 0; 1184 1185 /* Use a fudge factor of 256 bytes in case we collide 1186 * with a different set_EAs command. 1187 */ 1188 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1189 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1190 used_len + ea_name_len + ea_value_len + 1) { 1191 rc = -ENOSPC; 1192 goto sea_exit; 1193 } 1194 } 1195 } 1196 1197 /* Open */ 1198 rqst[0].rq_iov = vars->open_iov; 1199 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1200 1201 oparms = (struct cifs_open_parms) { 1202 .tcon = tcon, 1203 .path = path, 1204 .desired_access = FILE_WRITE_EA, 1205 .disposition = FILE_OPEN, 1206 .create_options = cifs_create_options(cifs_sb, 0), 1207 .fid = &fid, 1208 .replay = !!(retries), 1209 }; 1210 1211 rc = SMB2_open_init(tcon, server, 1212 &rqst[0], &oplock, &oparms, utf16_path); 1213 if (rc) 1214 goto sea_exit; 1215 smb2_set_next_command(tcon, &rqst[0]); 1216 1217 1218 /* Set Info */ 1219 rqst[1].rq_iov = vars->si_iov; 1220 rqst[1].rq_nvec = 1; 1221 1222 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1223 ea = kzalloc(len, GFP_KERNEL); 1224 if (ea == NULL) { 1225 rc = -ENOMEM; 1226 goto sea_exit; 1227 } 1228 1229 ea->ea_name_length = ea_name_len; 1230 ea->ea_value_length = cpu_to_le16(ea_value_len); 1231 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1232 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1233 1234 size[0] = len; 1235 data[0] = ea; 1236 1237 rc = SMB2_set_info_init(tcon, server, 1238 &rqst[1], COMPOUND_FID, 1239 COMPOUND_FID, current->tgid, 1240 FILE_FULL_EA_INFORMATION, 1241 SMB2_O_INFO_FILE, 0, data, size); 1242 if (rc) 1243 goto sea_exit; 1244 smb2_set_next_command(tcon, &rqst[1]); 1245 smb2_set_related(&rqst[1]); 1246 1247 /* Close */ 1248 rqst[2].rq_iov = &vars->close_iov; 1249 rqst[2].rq_nvec = 1; 1250 rc = SMB2_close_init(tcon, server, 1251 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1252 if (rc) 1253 goto sea_exit; 1254 smb2_set_related(&rqst[2]); 1255 1256 if (retries) { 1257 smb2_set_replay(server, &rqst[0]); 1258 smb2_set_replay(server, &rqst[1]); 1259 smb2_set_replay(server, &rqst[2]); 1260 } 1261 1262 rc = compound_send_recv(xid, ses, server, 1263 flags, 3, rqst, 1264 resp_buftype, rsp_iov); 1265 /* no need to bump num_remote_opens because handle immediately closed */ 1266 1267 sea_exit: 1268 kfree(ea); 1269 SMB2_open_free(&rqst[0]); 1270 SMB2_set_info_free(&rqst[1]); 1271 SMB2_close_free(&rqst[2]); 1272 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1273 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1274 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1275 kfree(vars); 1276 out_free_path: 1277 kfree(utf16_path); 1278 1279 if (is_replayable_error(rc) && 1280 smb2_should_replay(tcon, &retries, &cur_sleep)) 1281 goto replay_again; 1282 1283 return rc; 1284 } 1285 #endif 1286 1287 static bool 1288 smb2_can_echo(struct TCP_Server_Info *server) 1289 { 1290 return server->echoes; 1291 } 1292 1293 static void 1294 smb2_clear_stats(struct cifs_tcon *tcon) 1295 { 1296 int i; 1297 1298 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1299 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1300 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1301 } 1302 } 1303 1304 static void 1305 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1306 { 1307 seq_puts(m, "\n\tShare Capabilities:"); 1308 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1309 seq_puts(m, " DFS,"); 1310 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1311 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1312 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1313 seq_puts(m, " SCALEOUT,"); 1314 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1315 seq_puts(m, " CLUSTER,"); 1316 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1317 seq_puts(m, " ASYMMETRIC,"); 1318 if (tcon->capabilities == 0) 1319 seq_puts(m, " None"); 1320 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1321 seq_puts(m, " Aligned,"); 1322 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1323 seq_puts(m, " Partition Aligned,"); 1324 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1325 seq_puts(m, " SSD,"); 1326 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1327 seq_puts(m, " TRIM-support,"); 1328 1329 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1330 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1331 if (tcon->perf_sector_size) 1332 seq_printf(m, "\tOptimal sector size: 0x%x", 1333 tcon->perf_sector_size); 1334 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1335 } 1336 1337 static void 1338 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1339 { 1340 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1341 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1342 1343 /* 1344 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1345 * totals (requests sent) since those SMBs are per-session not per tcon 1346 */ 1347 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1348 (long long)(tcon->bytes_read), 1349 (long long)(tcon->bytes_written)); 1350 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1351 atomic_read(&tcon->num_local_opens), 1352 atomic_read(&tcon->num_remote_opens)); 1353 seq_printf(m, "\nTreeConnects: %d total %d failed", 1354 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1355 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1356 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1357 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1358 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1359 seq_printf(m, "\nCreates: %d total %d failed", 1360 atomic_read(&sent[SMB2_CREATE_HE]), 1361 atomic_read(&failed[SMB2_CREATE_HE])); 1362 seq_printf(m, "\nCloses: %d total %d failed", 1363 atomic_read(&sent[SMB2_CLOSE_HE]), 1364 atomic_read(&failed[SMB2_CLOSE_HE])); 1365 seq_printf(m, "\nFlushes: %d total %d failed", 1366 atomic_read(&sent[SMB2_FLUSH_HE]), 1367 atomic_read(&failed[SMB2_FLUSH_HE])); 1368 seq_printf(m, "\nReads: %d total %d failed", 1369 atomic_read(&sent[SMB2_READ_HE]), 1370 atomic_read(&failed[SMB2_READ_HE])); 1371 seq_printf(m, "\nWrites: %d total %d failed", 1372 atomic_read(&sent[SMB2_WRITE_HE]), 1373 atomic_read(&failed[SMB2_WRITE_HE])); 1374 seq_printf(m, "\nLocks: %d total %d failed", 1375 atomic_read(&sent[SMB2_LOCK_HE]), 1376 atomic_read(&failed[SMB2_LOCK_HE])); 1377 seq_printf(m, "\nIOCTLs: %d total %d failed", 1378 atomic_read(&sent[SMB2_IOCTL_HE]), 1379 atomic_read(&failed[SMB2_IOCTL_HE])); 1380 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1381 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1382 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1383 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1384 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1385 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1386 seq_printf(m, "\nQueryInfos: %d total %d failed", 1387 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1388 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1389 seq_printf(m, "\nSetInfos: %d total %d failed", 1390 atomic_read(&sent[SMB2_SET_INFO_HE]), 1391 atomic_read(&failed[SMB2_SET_INFO_HE])); 1392 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1393 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1394 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1395 } 1396 1397 static void 1398 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1399 { 1400 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1401 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1402 1403 cfile->fid.persistent_fid = fid->persistent_fid; 1404 cfile->fid.volatile_fid = fid->volatile_fid; 1405 cfile->fid.access = fid->access; 1406 #ifdef CONFIG_CIFS_DEBUG2 1407 cfile->fid.mid = fid->mid; 1408 #endif /* CIFS_DEBUG2 */ 1409 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1410 &fid->purge_cache); 1411 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1412 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1413 } 1414 1415 static int 1416 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1417 struct cifs_fid *fid) 1418 { 1419 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1420 } 1421 1422 static int 1423 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1424 struct cifsFileInfo *cfile) 1425 { 1426 struct smb2_file_network_open_info file_inf; 1427 struct inode *inode; 1428 int rc; 1429 1430 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1431 cfile->fid.volatile_fid, &file_inf); 1432 if (rc) 1433 return rc; 1434 1435 inode = d_inode(cfile->dentry); 1436 1437 spin_lock(&inode->i_lock); 1438 CIFS_I(inode)->time = jiffies; 1439 1440 /* Creation time should not need to be updated on close */ 1441 if (file_inf.LastWriteTime) 1442 inode_set_mtime_to_ts(inode, 1443 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1444 if (file_inf.ChangeTime) 1445 inode_set_ctime_to_ts(inode, 1446 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1447 if (file_inf.LastAccessTime) 1448 inode_set_atime_to_ts(inode, 1449 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1450 1451 /* 1452 * i_blocks is not related to (i_size / i_blksize), 1453 * but instead 512 byte (2**9) size is required for 1454 * calculating num blocks. 1455 */ 1456 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1457 inode->i_blocks = 1458 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1459 1460 /* End of file and Attributes should not have to be updated on close */ 1461 spin_unlock(&inode->i_lock); 1462 return rc; 1463 } 1464 1465 static int 1466 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1467 u64 persistent_fid, u64 volatile_fid, 1468 struct copychunk_ioctl *pcchunk) 1469 { 1470 int rc; 1471 unsigned int ret_data_len; 1472 struct resume_key_req *res_key; 1473 1474 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1475 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1476 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1477 1478 if (rc == -EOPNOTSUPP) { 1479 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1480 goto req_res_key_exit; 1481 } else if (rc) { 1482 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1483 goto req_res_key_exit; 1484 } 1485 if (ret_data_len < sizeof(struct resume_key_req)) { 1486 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1487 rc = -EINVAL; 1488 goto req_res_key_exit; 1489 } 1490 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1491 1492 req_res_key_exit: 1493 kfree(res_key); 1494 return rc; 1495 } 1496 1497 static int 1498 smb2_ioctl_query_info(const unsigned int xid, 1499 struct cifs_tcon *tcon, 1500 struct cifs_sb_info *cifs_sb, 1501 __le16 *path, int is_dir, 1502 unsigned long p) 1503 { 1504 struct smb2_compound_vars *vars; 1505 struct smb_rqst *rqst; 1506 struct kvec *rsp_iov; 1507 struct cifs_ses *ses = tcon->ses; 1508 struct TCP_Server_Info *server; 1509 char __user *arg = (char __user *)p; 1510 struct smb_query_info qi; 1511 struct smb_query_info __user *pqi; 1512 int rc = 0; 1513 int flags = CIFS_CP_CREATE_CLOSE_OP; 1514 struct smb2_query_info_rsp *qi_rsp = NULL; 1515 struct smb2_ioctl_rsp *io_rsp = NULL; 1516 void *buffer = NULL; 1517 int resp_buftype[3]; 1518 struct cifs_open_parms oparms; 1519 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1520 struct cifs_fid fid; 1521 unsigned int size[2]; 1522 void *data[2]; 1523 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1524 void (*free_req1_func)(struct smb_rqst *r); 1525 int retries = 0, cur_sleep = 1; 1526 1527 replay_again: 1528 /* reinitialize for possible replay */ 1529 flags = CIFS_CP_CREATE_CLOSE_OP; 1530 oplock = SMB2_OPLOCK_LEVEL_NONE; 1531 server = cifs_pick_channel(ses); 1532 1533 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1534 if (vars == NULL) 1535 return -ENOMEM; 1536 rqst = &vars->rqst[0]; 1537 rsp_iov = &vars->rsp_iov[0]; 1538 1539 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1540 1541 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1542 rc = -EFAULT; 1543 goto free_vars; 1544 } 1545 if (qi.output_buffer_length > 1024) { 1546 rc = -EINVAL; 1547 goto free_vars; 1548 } 1549 1550 if (!ses || !server) { 1551 rc = -EIO; 1552 goto free_vars; 1553 } 1554 1555 if (smb3_encryption_required(tcon)) 1556 flags |= CIFS_TRANSFORM_REQ; 1557 1558 if (qi.output_buffer_length) { 1559 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1560 if (IS_ERR(buffer)) { 1561 rc = PTR_ERR(buffer); 1562 goto free_vars; 1563 } 1564 } 1565 1566 /* Open */ 1567 rqst[0].rq_iov = &vars->open_iov[0]; 1568 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1569 1570 oparms = (struct cifs_open_parms) { 1571 .tcon = tcon, 1572 .disposition = FILE_OPEN, 1573 .create_options = cifs_create_options(cifs_sb, create_options), 1574 .fid = &fid, 1575 .replay = !!(retries), 1576 }; 1577 1578 if (qi.flags & PASSTHRU_FSCTL) { 1579 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1580 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1581 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1582 break; 1583 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1584 oparms.desired_access = GENERIC_ALL; 1585 break; 1586 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1587 oparms.desired_access = GENERIC_READ; 1588 break; 1589 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1590 oparms.desired_access = GENERIC_WRITE; 1591 break; 1592 } 1593 } else if (qi.flags & PASSTHRU_SET_INFO) { 1594 oparms.desired_access = GENERIC_WRITE; 1595 } else { 1596 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1597 } 1598 1599 rc = SMB2_open_init(tcon, server, 1600 &rqst[0], &oplock, &oparms, path); 1601 if (rc) 1602 goto free_output_buffer; 1603 smb2_set_next_command(tcon, &rqst[0]); 1604 1605 /* Query */ 1606 if (qi.flags & PASSTHRU_FSCTL) { 1607 /* Can eventually relax perm check since server enforces too */ 1608 if (!capable(CAP_SYS_ADMIN)) { 1609 rc = -EPERM; 1610 goto free_open_req; 1611 } 1612 rqst[1].rq_iov = &vars->io_iov[0]; 1613 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1614 1615 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1616 qi.info_type, buffer, qi.output_buffer_length, 1617 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1618 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1619 free_req1_func = SMB2_ioctl_free; 1620 } else if (qi.flags == PASSTHRU_SET_INFO) { 1621 /* Can eventually relax perm check since server enforces too */ 1622 if (!capable(CAP_SYS_ADMIN)) { 1623 rc = -EPERM; 1624 goto free_open_req; 1625 } 1626 if (qi.output_buffer_length < 8) { 1627 rc = -EINVAL; 1628 goto free_open_req; 1629 } 1630 rqst[1].rq_iov = vars->si_iov; 1631 rqst[1].rq_nvec = 1; 1632 1633 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1634 size[0] = 8; 1635 data[0] = buffer; 1636 1637 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1638 current->tgid, FILE_END_OF_FILE_INFORMATION, 1639 SMB2_O_INFO_FILE, 0, data, size); 1640 free_req1_func = SMB2_set_info_free; 1641 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1642 rqst[1].rq_iov = &vars->qi_iov; 1643 rqst[1].rq_nvec = 1; 1644 1645 rc = SMB2_query_info_init(tcon, server, 1646 &rqst[1], COMPOUND_FID, 1647 COMPOUND_FID, qi.file_info_class, 1648 qi.info_type, qi.additional_information, 1649 qi.input_buffer_length, 1650 qi.output_buffer_length, buffer); 1651 free_req1_func = SMB2_query_info_free; 1652 } else { /* unknown flags */ 1653 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1654 qi.flags); 1655 rc = -EINVAL; 1656 } 1657 1658 if (rc) 1659 goto free_open_req; 1660 smb2_set_next_command(tcon, &rqst[1]); 1661 smb2_set_related(&rqst[1]); 1662 1663 /* Close */ 1664 rqst[2].rq_iov = &vars->close_iov; 1665 rqst[2].rq_nvec = 1; 1666 1667 rc = SMB2_close_init(tcon, server, 1668 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1669 if (rc) 1670 goto free_req_1; 1671 smb2_set_related(&rqst[2]); 1672 1673 if (retries) { 1674 smb2_set_replay(server, &rqst[0]); 1675 smb2_set_replay(server, &rqst[1]); 1676 smb2_set_replay(server, &rqst[2]); 1677 } 1678 1679 rc = compound_send_recv(xid, ses, server, 1680 flags, 3, rqst, 1681 resp_buftype, rsp_iov); 1682 if (rc) 1683 goto out; 1684 1685 /* No need to bump num_remote_opens since handle immediately closed */ 1686 if (qi.flags & PASSTHRU_FSCTL) { 1687 pqi = (struct smb_query_info __user *)arg; 1688 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1689 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1690 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1691 if (qi.input_buffer_length > 0 && 1692 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1693 > rsp_iov[1].iov_len) { 1694 rc = -EFAULT; 1695 goto out; 1696 } 1697 1698 if (copy_to_user(&pqi->input_buffer_length, 1699 &qi.input_buffer_length, 1700 sizeof(qi.input_buffer_length))) { 1701 rc = -EFAULT; 1702 goto out; 1703 } 1704 1705 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1706 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1707 qi.input_buffer_length)) 1708 rc = -EFAULT; 1709 } else { 1710 pqi = (struct smb_query_info __user *)arg; 1711 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1712 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1713 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1714 if (copy_to_user(&pqi->input_buffer_length, 1715 &qi.input_buffer_length, 1716 sizeof(qi.input_buffer_length))) { 1717 rc = -EFAULT; 1718 goto out; 1719 } 1720 1721 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1722 qi.input_buffer_length)) 1723 rc = -EFAULT; 1724 } 1725 1726 out: 1727 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1728 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1729 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1730 SMB2_close_free(&rqst[2]); 1731 free_req_1: 1732 free_req1_func(&rqst[1]); 1733 free_open_req: 1734 SMB2_open_free(&rqst[0]); 1735 free_output_buffer: 1736 kfree(buffer); 1737 free_vars: 1738 kfree(vars); 1739 1740 if (is_replayable_error(rc) && 1741 smb2_should_replay(tcon, &retries, &cur_sleep)) 1742 goto replay_again; 1743 1744 return rc; 1745 } 1746 1747 static ssize_t 1748 smb2_copychunk_range(const unsigned int xid, 1749 struct cifsFileInfo *srcfile, 1750 struct cifsFileInfo *trgtfile, u64 src_off, 1751 u64 len, u64 dest_off) 1752 { 1753 int rc; 1754 unsigned int ret_data_len; 1755 struct copychunk_ioctl *pcchunk; 1756 struct copychunk_ioctl_rsp *retbuf = NULL; 1757 struct cifs_tcon *tcon; 1758 int chunks_copied = 0; 1759 bool chunk_sizes_updated = false; 1760 ssize_t bytes_written, total_bytes_written = 0; 1761 1762 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1763 if (pcchunk == NULL) 1764 return -ENOMEM; 1765 1766 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1767 /* Request a key from the server to identify the source of the copy */ 1768 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1769 srcfile->fid.persistent_fid, 1770 srcfile->fid.volatile_fid, pcchunk); 1771 1772 /* Note: request_res_key sets res_key null only if rc !=0 */ 1773 if (rc) 1774 goto cchunk_out; 1775 1776 /* For now array only one chunk long, will make more flexible later */ 1777 pcchunk->ChunkCount = cpu_to_le32(1); 1778 pcchunk->Reserved = 0; 1779 pcchunk->Reserved2 = 0; 1780 1781 tcon = tlink_tcon(trgtfile->tlink); 1782 1783 while (len > 0) { 1784 pcchunk->SourceOffset = cpu_to_le64(src_off); 1785 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1786 pcchunk->Length = 1787 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1788 1789 /* Request server copy to target from src identified by key */ 1790 kfree(retbuf); 1791 retbuf = NULL; 1792 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1793 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1794 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1795 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1796 if (rc == 0) { 1797 if (ret_data_len != 1798 sizeof(struct copychunk_ioctl_rsp)) { 1799 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1800 rc = -EIO; 1801 goto cchunk_out; 1802 } 1803 if (retbuf->TotalBytesWritten == 0) { 1804 cifs_dbg(FYI, "no bytes copied\n"); 1805 rc = -EIO; 1806 goto cchunk_out; 1807 } 1808 /* 1809 * Check if server claimed to write more than we asked 1810 */ 1811 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1812 le32_to_cpu(pcchunk->Length)) { 1813 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1814 rc = -EIO; 1815 goto cchunk_out; 1816 } 1817 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1818 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1819 rc = -EIO; 1820 goto cchunk_out; 1821 } 1822 chunks_copied++; 1823 1824 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1825 src_off += bytes_written; 1826 dest_off += bytes_written; 1827 len -= bytes_written; 1828 total_bytes_written += bytes_written; 1829 1830 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1831 le32_to_cpu(retbuf->ChunksWritten), 1832 le32_to_cpu(retbuf->ChunkBytesWritten), 1833 bytes_written); 1834 } else if (rc == -EINVAL) { 1835 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1836 goto cchunk_out; 1837 1838 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1839 le32_to_cpu(retbuf->ChunksWritten), 1840 le32_to_cpu(retbuf->ChunkBytesWritten), 1841 le32_to_cpu(retbuf->TotalBytesWritten)); 1842 1843 /* 1844 * Check if this is the first request using these sizes, 1845 * (ie check if copy succeed once with original sizes 1846 * and check if the server gave us different sizes after 1847 * we already updated max sizes on previous request). 1848 * if not then why is the server returning an error now 1849 */ 1850 if ((chunks_copied != 0) || chunk_sizes_updated) 1851 goto cchunk_out; 1852 1853 /* Check that server is not asking us to grow size */ 1854 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1855 tcon->max_bytes_chunk) 1856 tcon->max_bytes_chunk = 1857 le32_to_cpu(retbuf->ChunkBytesWritten); 1858 else 1859 goto cchunk_out; /* server gave us bogus size */ 1860 1861 /* No need to change MaxChunks since already set to 1 */ 1862 chunk_sizes_updated = true; 1863 } else 1864 goto cchunk_out; 1865 } 1866 1867 cchunk_out: 1868 kfree(pcchunk); 1869 kfree(retbuf); 1870 if (rc) 1871 return rc; 1872 else 1873 return total_bytes_written; 1874 } 1875 1876 static int 1877 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1878 struct cifs_fid *fid) 1879 { 1880 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1881 } 1882 1883 static unsigned int 1884 smb2_read_data_offset(char *buf) 1885 { 1886 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1887 1888 return rsp->DataOffset; 1889 } 1890 1891 static unsigned int 1892 smb2_read_data_length(char *buf, bool in_remaining) 1893 { 1894 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1895 1896 if (in_remaining) 1897 return le32_to_cpu(rsp->DataRemaining); 1898 1899 return le32_to_cpu(rsp->DataLength); 1900 } 1901 1902 1903 static int 1904 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1905 struct cifs_io_parms *parms, unsigned int *bytes_read, 1906 char **buf, int *buf_type) 1907 { 1908 parms->persistent_fid = pfid->persistent_fid; 1909 parms->volatile_fid = pfid->volatile_fid; 1910 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1911 } 1912 1913 static int 1914 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1915 struct cifs_io_parms *parms, unsigned int *written, 1916 struct kvec *iov, unsigned long nr_segs) 1917 { 1918 1919 parms->persistent_fid = pfid->persistent_fid; 1920 parms->volatile_fid = pfid->volatile_fid; 1921 return SMB2_write(xid, parms, written, iov, nr_segs); 1922 } 1923 1924 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1925 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1926 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1927 { 1928 struct cifsInodeInfo *cifsi; 1929 int rc; 1930 1931 cifsi = CIFS_I(inode); 1932 1933 /* if file already sparse don't bother setting sparse again */ 1934 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1935 return true; /* already sparse */ 1936 1937 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1938 return true; /* already not sparse */ 1939 1940 /* 1941 * Can't check for sparse support on share the usual way via the 1942 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1943 * since Samba server doesn't set the flag on the share, yet 1944 * supports the set sparse FSCTL and returns sparse correctly 1945 * in the file attributes. If we fail setting sparse though we 1946 * mark that server does not support sparse files for this share 1947 * to avoid repeatedly sending the unsupported fsctl to server 1948 * if the file is repeatedly extended. 1949 */ 1950 if (tcon->broken_sparse_sup) 1951 return false; 1952 1953 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1954 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1955 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1956 if (rc) { 1957 tcon->broken_sparse_sup = true; 1958 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1959 return false; 1960 } 1961 1962 if (setsparse) 1963 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1964 else 1965 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1966 1967 return true; 1968 } 1969 1970 static int 1971 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1972 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1973 { 1974 struct inode *inode; 1975 1976 /* 1977 * If extending file more than one page make sparse. Many Linux fs 1978 * make files sparse by default when extending via ftruncate 1979 */ 1980 inode = d_inode(cfile->dentry); 1981 1982 if (!set_alloc && (size > inode->i_size + 8192)) { 1983 __u8 set_sparse = 1; 1984 1985 /* whether set sparse succeeds or not, extend the file */ 1986 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1987 } 1988 1989 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1990 cfile->fid.volatile_fid, cfile->pid, size); 1991 } 1992 1993 static int 1994 smb2_duplicate_extents(const unsigned int xid, 1995 struct cifsFileInfo *srcfile, 1996 struct cifsFileInfo *trgtfile, u64 src_off, 1997 u64 len, u64 dest_off) 1998 { 1999 int rc; 2000 unsigned int ret_data_len; 2001 struct inode *inode; 2002 struct duplicate_extents_to_file dup_ext_buf; 2003 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2004 2005 /* server fileays advertise duplicate extent support with this flag */ 2006 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2007 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2008 return -EOPNOTSUPP; 2009 2010 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2011 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2012 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2013 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2014 dup_ext_buf.ByteCount = cpu_to_le64(len); 2015 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2016 src_off, dest_off, len); 2017 2018 inode = d_inode(trgtfile->dentry); 2019 if (inode->i_size < dest_off + len) { 2020 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2021 if (rc) 2022 goto duplicate_extents_out; 2023 2024 /* 2025 * Although also could set plausible allocation size (i_blocks) 2026 * here in addition to setting the file size, in reflink 2027 * it is likely that the target file is sparse. Its allocation 2028 * size will be queried on next revalidate, but it is important 2029 * to make sure that file's cached size is updated immediately 2030 */ 2031 cifs_setsize(inode, dest_off + len); 2032 } 2033 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2034 trgtfile->fid.volatile_fid, 2035 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2036 (char *)&dup_ext_buf, 2037 sizeof(struct duplicate_extents_to_file), 2038 CIFSMaxBufSize, NULL, 2039 &ret_data_len); 2040 2041 if (ret_data_len > 0) 2042 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2043 2044 duplicate_extents_out: 2045 return rc; 2046 } 2047 2048 static int 2049 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2050 struct cifsFileInfo *cfile) 2051 { 2052 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2053 cfile->fid.volatile_fid); 2054 } 2055 2056 static int 2057 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2058 struct cifsFileInfo *cfile) 2059 { 2060 struct fsctl_set_integrity_information_req integr_info; 2061 unsigned int ret_data_len; 2062 2063 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2064 integr_info.Flags = 0; 2065 integr_info.Reserved = 0; 2066 2067 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2068 cfile->fid.volatile_fid, 2069 FSCTL_SET_INTEGRITY_INFORMATION, 2070 (char *)&integr_info, 2071 sizeof(struct fsctl_set_integrity_information_req), 2072 CIFSMaxBufSize, NULL, 2073 &ret_data_len); 2074 2075 } 2076 2077 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2078 #define GMT_TOKEN_SIZE 50 2079 2080 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2081 2082 /* 2083 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2084 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2085 */ 2086 static int 2087 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2088 struct cifsFileInfo *cfile, void __user *ioc_buf) 2089 { 2090 char *retbuf = NULL; 2091 unsigned int ret_data_len = 0; 2092 int rc; 2093 u32 max_response_size; 2094 struct smb_snapshot_array snapshot_in; 2095 2096 /* 2097 * On the first query to enumerate the list of snapshots available 2098 * for this volume the buffer begins with 0 (number of snapshots 2099 * which can be returned is zero since at that point we do not know 2100 * how big the buffer needs to be). On the second query, 2101 * it (ret_data_len) is set to number of snapshots so we can 2102 * know to set the maximum response size larger (see below). 2103 */ 2104 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2105 return -EFAULT; 2106 2107 /* 2108 * Note that for snapshot queries that servers like Azure expect that 2109 * the first query be minimal size (and just used to get the number/size 2110 * of previous versions) so response size must be specified as EXACTLY 2111 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2112 * of eight bytes. 2113 */ 2114 if (ret_data_len == 0) 2115 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2116 else 2117 max_response_size = CIFSMaxBufSize; 2118 2119 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2120 cfile->fid.volatile_fid, 2121 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2122 NULL, 0 /* no input data */, max_response_size, 2123 (char **)&retbuf, 2124 &ret_data_len); 2125 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2126 rc, ret_data_len); 2127 if (rc) 2128 return rc; 2129 2130 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2131 /* Fixup buffer */ 2132 if (copy_from_user(&snapshot_in, ioc_buf, 2133 sizeof(struct smb_snapshot_array))) { 2134 rc = -EFAULT; 2135 kfree(retbuf); 2136 return rc; 2137 } 2138 2139 /* 2140 * Check for min size, ie not large enough to fit even one GMT 2141 * token (snapshot). On the first ioctl some users may pass in 2142 * smaller size (or zero) to simply get the size of the array 2143 * so the user space caller can allocate sufficient memory 2144 * and retry the ioctl again with larger array size sufficient 2145 * to hold all of the snapshot GMT tokens on the second try. 2146 */ 2147 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2148 ret_data_len = sizeof(struct smb_snapshot_array); 2149 2150 /* 2151 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2152 * the snapshot array (of 50 byte GMT tokens) each 2153 * representing an available previous version of the data 2154 */ 2155 if (ret_data_len > (snapshot_in.snapshot_array_size + 2156 sizeof(struct smb_snapshot_array))) 2157 ret_data_len = snapshot_in.snapshot_array_size + 2158 sizeof(struct smb_snapshot_array); 2159 2160 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2161 rc = -EFAULT; 2162 } 2163 2164 kfree(retbuf); 2165 return rc; 2166 } 2167 2168 2169 2170 static int 2171 smb3_notify(const unsigned int xid, struct file *pfile, 2172 void __user *ioc_buf, bool return_changes) 2173 { 2174 struct smb3_notify_info notify; 2175 struct smb3_notify_info __user *pnotify_buf; 2176 struct dentry *dentry = pfile->f_path.dentry; 2177 struct inode *inode = file_inode(pfile); 2178 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2179 struct cifs_open_parms oparms; 2180 struct cifs_fid fid; 2181 struct cifs_tcon *tcon; 2182 const unsigned char *path; 2183 char *returned_ioctl_info = NULL; 2184 void *page = alloc_dentry_path(); 2185 __le16 *utf16_path = NULL; 2186 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2187 int rc = 0; 2188 __u32 ret_len = 0; 2189 2190 path = build_path_from_dentry(dentry, page); 2191 if (IS_ERR(path)) { 2192 rc = PTR_ERR(path); 2193 goto notify_exit; 2194 } 2195 2196 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2197 if (utf16_path == NULL) { 2198 rc = -ENOMEM; 2199 goto notify_exit; 2200 } 2201 2202 if (return_changes) { 2203 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2204 rc = -EFAULT; 2205 goto notify_exit; 2206 } 2207 } else { 2208 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2209 rc = -EFAULT; 2210 goto notify_exit; 2211 } 2212 notify.data_len = 0; 2213 } 2214 2215 tcon = cifs_sb_master_tcon(cifs_sb); 2216 oparms = (struct cifs_open_parms) { 2217 .tcon = tcon, 2218 .path = path, 2219 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2220 .disposition = FILE_OPEN, 2221 .create_options = cifs_create_options(cifs_sb, 0), 2222 .fid = &fid, 2223 }; 2224 2225 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2226 NULL); 2227 if (rc) 2228 goto notify_exit; 2229 2230 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2231 notify.watch_tree, notify.completion_filter, 2232 notify.data_len, &returned_ioctl_info, &ret_len); 2233 2234 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2235 2236 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2237 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2238 if (ret_len > notify.data_len) 2239 ret_len = notify.data_len; 2240 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2241 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2242 rc = -EFAULT; 2243 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2244 rc = -EFAULT; 2245 } 2246 kfree(returned_ioctl_info); 2247 notify_exit: 2248 free_dentry_path(page); 2249 kfree(utf16_path); 2250 return rc; 2251 } 2252 2253 static int 2254 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2255 const char *path, struct cifs_sb_info *cifs_sb, 2256 struct cifs_fid *fid, __u16 search_flags, 2257 struct cifs_search_info *srch_inf) 2258 { 2259 __le16 *utf16_path; 2260 struct smb_rqst rqst[2]; 2261 struct kvec rsp_iov[2]; 2262 int resp_buftype[2]; 2263 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2264 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2265 int rc, flags = 0; 2266 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2267 struct cifs_open_parms oparms; 2268 struct smb2_query_directory_rsp *qd_rsp = NULL; 2269 struct smb2_create_rsp *op_rsp = NULL; 2270 struct TCP_Server_Info *server; 2271 int retries = 0, cur_sleep = 1; 2272 2273 replay_again: 2274 /* reinitialize for possible replay */ 2275 flags = 0; 2276 oplock = SMB2_OPLOCK_LEVEL_NONE; 2277 server = cifs_pick_channel(tcon->ses); 2278 2279 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2280 if (!utf16_path) 2281 return -ENOMEM; 2282 2283 if (smb3_encryption_required(tcon)) 2284 flags |= CIFS_TRANSFORM_REQ; 2285 2286 memset(rqst, 0, sizeof(rqst)); 2287 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2288 memset(rsp_iov, 0, sizeof(rsp_iov)); 2289 2290 /* Open */ 2291 memset(&open_iov, 0, sizeof(open_iov)); 2292 rqst[0].rq_iov = open_iov; 2293 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2294 2295 oparms = (struct cifs_open_parms) { 2296 .tcon = tcon, 2297 .path = path, 2298 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2299 .disposition = FILE_OPEN, 2300 .create_options = cifs_create_options(cifs_sb, 0), 2301 .fid = fid, 2302 .replay = !!(retries), 2303 }; 2304 2305 rc = SMB2_open_init(tcon, server, 2306 &rqst[0], &oplock, &oparms, utf16_path); 2307 if (rc) 2308 goto qdf_free; 2309 smb2_set_next_command(tcon, &rqst[0]); 2310 2311 /* Query directory */ 2312 srch_inf->entries_in_buffer = 0; 2313 srch_inf->index_of_last_entry = 2; 2314 2315 memset(&qd_iov, 0, sizeof(qd_iov)); 2316 rqst[1].rq_iov = qd_iov; 2317 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2318 2319 rc = SMB2_query_directory_init(xid, tcon, server, 2320 &rqst[1], 2321 COMPOUND_FID, COMPOUND_FID, 2322 0, srch_inf->info_level); 2323 if (rc) 2324 goto qdf_free; 2325 2326 smb2_set_related(&rqst[1]); 2327 2328 if (retries) { 2329 smb2_set_replay(server, &rqst[0]); 2330 smb2_set_replay(server, &rqst[1]); 2331 } 2332 2333 rc = compound_send_recv(xid, tcon->ses, server, 2334 flags, 2, rqst, 2335 resp_buftype, rsp_iov); 2336 2337 /* If the open failed there is nothing to do */ 2338 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2339 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2340 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2341 goto qdf_free; 2342 } 2343 fid->persistent_fid = op_rsp->PersistentFileId; 2344 fid->volatile_fid = op_rsp->VolatileFileId; 2345 2346 /* Anything else than ENODATA means a genuine error */ 2347 if (rc && rc != -ENODATA) { 2348 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2349 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2350 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2351 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2352 goto qdf_free; 2353 } 2354 2355 atomic_inc(&tcon->num_remote_opens); 2356 2357 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2358 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2359 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2360 tcon->tid, tcon->ses->Suid, 0, 0); 2361 srch_inf->endOfSearch = true; 2362 rc = 0; 2363 goto qdf_free; 2364 } 2365 2366 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2367 srch_inf); 2368 if (rc) { 2369 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2370 tcon->ses->Suid, 0, 0, rc); 2371 goto qdf_free; 2372 } 2373 resp_buftype[1] = CIFS_NO_BUFFER; 2374 2375 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2376 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2377 2378 qdf_free: 2379 kfree(utf16_path); 2380 SMB2_open_free(&rqst[0]); 2381 SMB2_query_directory_free(&rqst[1]); 2382 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2383 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2384 2385 if (is_replayable_error(rc) && 2386 smb2_should_replay(tcon, &retries, &cur_sleep)) 2387 goto replay_again; 2388 2389 return rc; 2390 } 2391 2392 static int 2393 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2394 struct cifs_fid *fid, __u16 search_flags, 2395 struct cifs_search_info *srch_inf) 2396 { 2397 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2398 fid->volatile_fid, 0, srch_inf); 2399 } 2400 2401 static int 2402 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2403 struct cifs_fid *fid) 2404 { 2405 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2406 } 2407 2408 /* 2409 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2410 * the number of credits and return true. Otherwise - return false. 2411 */ 2412 static bool 2413 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2414 { 2415 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2416 int scredits, in_flight; 2417 2418 if (shdr->Status != STATUS_PENDING) 2419 return false; 2420 2421 if (shdr->CreditRequest) { 2422 spin_lock(&server->req_lock); 2423 server->credits += le16_to_cpu(shdr->CreditRequest); 2424 scredits = server->credits; 2425 in_flight = server->in_flight; 2426 spin_unlock(&server->req_lock); 2427 wake_up(&server->request_q); 2428 2429 trace_smb3_pend_credits(server->CurrentMid, 2430 server->conn_id, server->hostname, scredits, 2431 le16_to_cpu(shdr->CreditRequest), in_flight); 2432 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2433 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2434 } 2435 2436 return true; 2437 } 2438 2439 static bool 2440 smb2_is_session_expired(char *buf) 2441 { 2442 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2443 2444 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2445 shdr->Status != STATUS_USER_SESSION_DELETED) 2446 return false; 2447 2448 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2449 le64_to_cpu(shdr->SessionId), 2450 le16_to_cpu(shdr->Command), 2451 le64_to_cpu(shdr->MessageId)); 2452 cifs_dbg(FYI, "Session expired or deleted\n"); 2453 2454 return true; 2455 } 2456 2457 static bool 2458 smb2_is_status_io_timeout(char *buf) 2459 { 2460 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2461 2462 if (shdr->Status == STATUS_IO_TIMEOUT) 2463 return true; 2464 else 2465 return false; 2466 } 2467 2468 static bool 2469 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2470 { 2471 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2472 struct TCP_Server_Info *pserver; 2473 struct cifs_ses *ses; 2474 struct cifs_tcon *tcon; 2475 2476 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2477 return false; 2478 2479 /* If server is a channel, select the primary channel */ 2480 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2481 2482 spin_lock(&cifs_tcp_ses_lock); 2483 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2484 if (cifs_ses_exiting(ses)) 2485 continue; 2486 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2487 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2488 spin_lock(&tcon->tc_lock); 2489 tcon->need_reconnect = true; 2490 spin_unlock(&tcon->tc_lock); 2491 spin_unlock(&cifs_tcp_ses_lock); 2492 pr_warn_once("Server share %s deleted.\n", 2493 tcon->tree_name); 2494 return true; 2495 } 2496 } 2497 } 2498 spin_unlock(&cifs_tcp_ses_lock); 2499 2500 return false; 2501 } 2502 2503 static int 2504 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2505 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2506 { 2507 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2508 return SMB2_lease_break(0, tcon, cinode->lease_key, 2509 smb2_get_lease_state(cinode)); 2510 2511 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2512 CIFS_CACHE_READ(cinode) ? 1 : 0); 2513 } 2514 2515 void 2516 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2517 { 2518 struct smb2_hdr *shdr; 2519 2520 if (server->dialect < SMB30_PROT_ID) 2521 return; 2522 2523 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2524 if (shdr == NULL) { 2525 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2526 return; 2527 } 2528 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2529 } 2530 2531 void 2532 smb2_set_related(struct smb_rqst *rqst) 2533 { 2534 struct smb2_hdr *shdr; 2535 2536 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2537 if (shdr == NULL) { 2538 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2539 return; 2540 } 2541 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2542 } 2543 2544 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2545 2546 void 2547 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2548 { 2549 struct smb2_hdr *shdr; 2550 struct cifs_ses *ses = tcon->ses; 2551 struct TCP_Server_Info *server = ses->server; 2552 unsigned long len = smb_rqst_len(server, rqst); 2553 int i, num_padding; 2554 2555 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2556 if (shdr == NULL) { 2557 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2558 return; 2559 } 2560 2561 /* SMB headers in a compound are 8 byte aligned. */ 2562 2563 /* No padding needed */ 2564 if (!(len & 7)) 2565 goto finished; 2566 2567 num_padding = 8 - (len & 7); 2568 if (!smb3_encryption_required(tcon)) { 2569 /* 2570 * If we do not have encryption then we can just add an extra 2571 * iov for the padding. 2572 */ 2573 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2574 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2575 rqst->rq_nvec++; 2576 len += num_padding; 2577 } else { 2578 /* 2579 * We can not add a small padding iov for the encryption case 2580 * because the encryption framework can not handle the padding 2581 * iovs. 2582 * We have to flatten this into a single buffer and add 2583 * the padding to it. 2584 */ 2585 for (i = 1; i < rqst->rq_nvec; i++) { 2586 memcpy(rqst->rq_iov[0].iov_base + 2587 rqst->rq_iov[0].iov_len, 2588 rqst->rq_iov[i].iov_base, 2589 rqst->rq_iov[i].iov_len); 2590 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2591 } 2592 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2593 0, num_padding); 2594 rqst->rq_iov[0].iov_len += num_padding; 2595 len += num_padding; 2596 rqst->rq_nvec = 1; 2597 } 2598 2599 finished: 2600 shdr->NextCommand = cpu_to_le32(len); 2601 } 2602 2603 /* 2604 * helper function for exponential backoff and check if replayable 2605 */ 2606 bool smb2_should_replay(struct cifs_tcon *tcon, 2607 int *pretries, 2608 int *pcur_sleep) 2609 { 2610 if (!pretries || !pcur_sleep) 2611 return false; 2612 2613 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2614 msleep(*pcur_sleep); 2615 (*pcur_sleep) = ((*pcur_sleep) << 1); 2616 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2617 (*pcur_sleep) = CIFS_MAX_SLEEP; 2618 return true; 2619 } 2620 2621 return false; 2622 } 2623 2624 /* 2625 * Passes the query info response back to the caller on success. 2626 * Caller need to free this with free_rsp_buf(). 2627 */ 2628 int 2629 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2630 const char *path, u32 desired_access, 2631 u32 class, u32 type, u32 output_len, 2632 struct kvec *rsp, int *buftype, 2633 struct cifs_sb_info *cifs_sb) 2634 { 2635 struct smb2_compound_vars *vars; 2636 struct cifs_ses *ses = tcon->ses; 2637 struct TCP_Server_Info *server; 2638 int flags = CIFS_CP_CREATE_CLOSE_OP; 2639 struct smb_rqst *rqst; 2640 int resp_buftype[3]; 2641 struct kvec *rsp_iov; 2642 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2643 struct cifs_open_parms oparms; 2644 struct cifs_fid fid; 2645 int rc; 2646 __le16 *utf16_path; 2647 struct cached_fid *cfid = NULL; 2648 int retries = 0, cur_sleep = 1; 2649 2650 replay_again: 2651 /* reinitialize for possible replay */ 2652 flags = CIFS_CP_CREATE_CLOSE_OP; 2653 oplock = SMB2_OPLOCK_LEVEL_NONE; 2654 server = cifs_pick_channel(ses); 2655 2656 if (!path) 2657 path = ""; 2658 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2659 if (!utf16_path) 2660 return -ENOMEM; 2661 2662 if (smb3_encryption_required(tcon)) 2663 flags |= CIFS_TRANSFORM_REQ; 2664 2665 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2666 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2667 if (!vars) { 2668 rc = -ENOMEM; 2669 goto out_free_path; 2670 } 2671 rqst = vars->rqst; 2672 rsp_iov = vars->rsp_iov; 2673 2674 /* 2675 * We can only call this for things we know are directories. 2676 */ 2677 if (!strcmp(path, "")) 2678 open_cached_dir(xid, tcon, path, cifs_sb, false, 2679 &cfid); /* cfid null if open dir failed */ 2680 2681 rqst[0].rq_iov = vars->open_iov; 2682 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2683 2684 oparms = (struct cifs_open_parms) { 2685 .tcon = tcon, 2686 .path = path, 2687 .desired_access = desired_access, 2688 .disposition = FILE_OPEN, 2689 .create_options = cifs_create_options(cifs_sb, 0), 2690 .fid = &fid, 2691 .replay = !!(retries), 2692 }; 2693 2694 rc = SMB2_open_init(tcon, server, 2695 &rqst[0], &oplock, &oparms, utf16_path); 2696 if (rc) 2697 goto qic_exit; 2698 smb2_set_next_command(tcon, &rqst[0]); 2699 2700 rqst[1].rq_iov = &vars->qi_iov; 2701 rqst[1].rq_nvec = 1; 2702 2703 if (cfid) { 2704 rc = SMB2_query_info_init(tcon, server, 2705 &rqst[1], 2706 cfid->fid.persistent_fid, 2707 cfid->fid.volatile_fid, 2708 class, type, 0, 2709 output_len, 0, 2710 NULL); 2711 } else { 2712 rc = SMB2_query_info_init(tcon, server, 2713 &rqst[1], 2714 COMPOUND_FID, 2715 COMPOUND_FID, 2716 class, type, 0, 2717 output_len, 0, 2718 NULL); 2719 } 2720 if (rc) 2721 goto qic_exit; 2722 if (!cfid) { 2723 smb2_set_next_command(tcon, &rqst[1]); 2724 smb2_set_related(&rqst[1]); 2725 } 2726 2727 rqst[2].rq_iov = &vars->close_iov; 2728 rqst[2].rq_nvec = 1; 2729 2730 rc = SMB2_close_init(tcon, server, 2731 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2732 if (rc) 2733 goto qic_exit; 2734 smb2_set_related(&rqst[2]); 2735 2736 if (retries) { 2737 if (!cfid) { 2738 smb2_set_replay(server, &rqst[0]); 2739 smb2_set_replay(server, &rqst[2]); 2740 } 2741 smb2_set_replay(server, &rqst[1]); 2742 } 2743 2744 if (cfid) { 2745 rc = compound_send_recv(xid, ses, server, 2746 flags, 1, &rqst[1], 2747 &resp_buftype[1], &rsp_iov[1]); 2748 } else { 2749 rc = compound_send_recv(xid, ses, server, 2750 flags, 3, rqst, 2751 resp_buftype, rsp_iov); 2752 } 2753 if (rc) { 2754 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2755 if (rc == -EREMCHG) { 2756 tcon->need_reconnect = true; 2757 pr_warn_once("server share %s deleted\n", 2758 tcon->tree_name); 2759 } 2760 goto qic_exit; 2761 } 2762 *rsp = rsp_iov[1]; 2763 *buftype = resp_buftype[1]; 2764 2765 qic_exit: 2766 SMB2_open_free(&rqst[0]); 2767 SMB2_query_info_free(&rqst[1]); 2768 SMB2_close_free(&rqst[2]); 2769 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2770 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2771 if (cfid) 2772 close_cached_dir(cfid); 2773 kfree(vars); 2774 out_free_path: 2775 kfree(utf16_path); 2776 2777 if (is_replayable_error(rc) && 2778 smb2_should_replay(tcon, &retries, &cur_sleep)) 2779 goto replay_again; 2780 2781 return rc; 2782 } 2783 2784 static int 2785 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2786 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2787 { 2788 struct smb2_query_info_rsp *rsp; 2789 struct smb2_fs_full_size_info *info = NULL; 2790 struct kvec rsp_iov = {NULL, 0}; 2791 int buftype = CIFS_NO_BUFFER; 2792 int rc; 2793 2794 2795 rc = smb2_query_info_compound(xid, tcon, "", 2796 FILE_READ_ATTRIBUTES, 2797 FS_FULL_SIZE_INFORMATION, 2798 SMB2_O_INFO_FILESYSTEM, 2799 sizeof(struct smb2_fs_full_size_info), 2800 &rsp_iov, &buftype, cifs_sb); 2801 if (rc) 2802 goto qfs_exit; 2803 2804 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2805 buf->f_type = SMB2_SUPER_MAGIC; 2806 info = (struct smb2_fs_full_size_info *)( 2807 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2808 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2809 le32_to_cpu(rsp->OutputBufferLength), 2810 &rsp_iov, 2811 sizeof(struct smb2_fs_full_size_info)); 2812 if (!rc) 2813 smb2_copy_fs_info_to_kstatfs(info, buf); 2814 2815 qfs_exit: 2816 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2817 free_rsp_buf(buftype, rsp_iov.iov_base); 2818 return rc; 2819 } 2820 2821 static int 2822 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2823 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2824 { 2825 int rc; 2826 __le16 srch_path = 0; /* Null - open root of share */ 2827 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2828 struct cifs_open_parms oparms; 2829 struct cifs_fid fid; 2830 2831 if (!tcon->posix_extensions) 2832 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2833 2834 oparms = (struct cifs_open_parms) { 2835 .tcon = tcon, 2836 .path = "", 2837 .desired_access = FILE_READ_ATTRIBUTES, 2838 .disposition = FILE_OPEN, 2839 .create_options = cifs_create_options(cifs_sb, 0), 2840 .fid = &fid, 2841 }; 2842 2843 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2844 NULL, NULL); 2845 if (rc) 2846 return rc; 2847 2848 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2849 fid.volatile_fid, buf); 2850 buf->f_type = SMB2_SUPER_MAGIC; 2851 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2852 return rc; 2853 } 2854 2855 static bool 2856 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2857 { 2858 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2859 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2860 } 2861 2862 static int 2863 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2864 __u64 length, __u32 type, int lock, int unlock, bool wait) 2865 { 2866 if (unlock && !lock) 2867 type = SMB2_LOCKFLAG_UNLOCK; 2868 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2869 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2870 current->tgid, length, offset, type, wait); 2871 } 2872 2873 static void 2874 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2875 { 2876 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2877 } 2878 2879 static void 2880 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2881 { 2882 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2883 } 2884 2885 static void 2886 smb2_new_lease_key(struct cifs_fid *fid) 2887 { 2888 generate_random_uuid(fid->lease_key); 2889 } 2890 2891 static int 2892 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2893 const char *search_name, 2894 struct dfs_info3_param **target_nodes, 2895 unsigned int *num_of_nodes, 2896 const struct nls_table *nls_codepage, int remap) 2897 { 2898 int rc; 2899 __le16 *utf16_path = NULL; 2900 int utf16_path_len = 0; 2901 struct cifs_tcon *tcon; 2902 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2903 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2904 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2905 int retry_count = 0; 2906 2907 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2908 2909 /* 2910 * Try to use the IPC tcon, otherwise just use any 2911 */ 2912 tcon = ses->tcon_ipc; 2913 if (tcon == NULL) { 2914 spin_lock(&cifs_tcp_ses_lock); 2915 tcon = list_first_entry_or_null(&ses->tcon_list, 2916 struct cifs_tcon, 2917 tcon_list); 2918 if (tcon) 2919 tcon->tc_count++; 2920 spin_unlock(&cifs_tcp_ses_lock); 2921 } 2922 2923 if (tcon == NULL) { 2924 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2925 ses); 2926 rc = -ENOTCONN; 2927 goto out; 2928 } 2929 2930 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2931 &utf16_path_len, 2932 nls_codepage, remap); 2933 if (!utf16_path) { 2934 rc = -ENOMEM; 2935 goto out; 2936 } 2937 2938 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2939 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2940 if (!dfs_req) { 2941 rc = -ENOMEM; 2942 goto out; 2943 } 2944 2945 /* Highest DFS referral version understood */ 2946 dfs_req->MaxReferralLevel = DFS_VERSION; 2947 2948 /* Path to resolve in an UTF-16 null-terminated string */ 2949 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2950 2951 do { 2952 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2953 FSCTL_DFS_GET_REFERRALS, 2954 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2955 (char **)&dfs_rsp, &dfs_rsp_size); 2956 if (!is_retryable_error(rc)) 2957 break; 2958 usleep_range(512, 2048); 2959 } while (++retry_count < 5); 2960 2961 if (!rc && !dfs_rsp) 2962 rc = -EIO; 2963 if (rc) { 2964 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2965 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2966 goto out; 2967 } 2968 2969 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2970 num_of_nodes, target_nodes, 2971 nls_codepage, remap, search_name, 2972 true /* is_unicode */); 2973 if (rc) { 2974 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2975 goto out; 2976 } 2977 2978 out: 2979 if (tcon && !tcon->ipc) { 2980 /* ipc tcons are not refcounted */ 2981 spin_lock(&cifs_tcp_ses_lock); 2982 tcon->tc_count--; 2983 /* tc_count can never go negative */ 2984 WARN_ON(tcon->tc_count < 0); 2985 spin_unlock(&cifs_tcp_ses_lock); 2986 } 2987 kfree(utf16_path); 2988 kfree(dfs_req); 2989 kfree(dfs_rsp); 2990 return rc; 2991 } 2992 2993 static struct cifs_ntsd * 2994 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 2995 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 2996 { 2997 struct cifs_ntsd *pntsd = NULL; 2998 unsigned int xid; 2999 int rc = -EOPNOTSUPP; 3000 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3001 3002 if (IS_ERR(tlink)) 3003 return ERR_CAST(tlink); 3004 3005 xid = get_xid(); 3006 cifs_dbg(FYI, "trying to get acl\n"); 3007 3008 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3009 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3010 info); 3011 free_xid(xid); 3012 3013 cifs_put_tlink(tlink); 3014 3015 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3016 if (rc) 3017 return ERR_PTR(rc); 3018 return pntsd; 3019 3020 } 3021 3022 static struct cifs_ntsd * 3023 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3024 const char *path, u32 *pacllen, u32 info) 3025 { 3026 struct cifs_ntsd *pntsd = NULL; 3027 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3028 unsigned int xid; 3029 int rc; 3030 struct cifs_tcon *tcon; 3031 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3032 struct cifs_fid fid; 3033 struct cifs_open_parms oparms; 3034 __le16 *utf16_path; 3035 3036 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3037 if (IS_ERR(tlink)) 3038 return ERR_CAST(tlink); 3039 3040 tcon = tlink_tcon(tlink); 3041 xid = get_xid(); 3042 3043 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3044 if (!utf16_path) { 3045 rc = -ENOMEM; 3046 free_xid(xid); 3047 return ERR_PTR(rc); 3048 } 3049 3050 oparms = (struct cifs_open_parms) { 3051 .tcon = tcon, 3052 .path = path, 3053 .desired_access = READ_CONTROL, 3054 .disposition = FILE_OPEN, 3055 /* 3056 * When querying an ACL, even if the file is a symlink 3057 * we want to open the source not the target, and so 3058 * the protocol requires that the client specify this 3059 * flag when opening a reparse point 3060 */ 3061 .create_options = cifs_create_options(cifs_sb, 0) | 3062 OPEN_REPARSE_POINT, 3063 .fid = &fid, 3064 }; 3065 3066 if (info & SACL_SECINFO) 3067 oparms.desired_access |= SYSTEM_SECURITY; 3068 3069 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3070 NULL); 3071 kfree(utf16_path); 3072 if (!rc) { 3073 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3074 fid.volatile_fid, (void **)&pntsd, pacllen, 3075 info); 3076 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3077 } 3078 3079 cifs_put_tlink(tlink); 3080 free_xid(xid); 3081 3082 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3083 if (rc) 3084 return ERR_PTR(rc); 3085 return pntsd; 3086 } 3087 3088 static int 3089 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3090 struct inode *inode, const char *path, int aclflag) 3091 { 3092 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3093 unsigned int xid; 3094 int rc, access_flags = 0; 3095 struct cifs_tcon *tcon; 3096 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3097 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3098 struct cifs_fid fid; 3099 struct cifs_open_parms oparms; 3100 __le16 *utf16_path; 3101 3102 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3103 if (IS_ERR(tlink)) 3104 return PTR_ERR(tlink); 3105 3106 tcon = tlink_tcon(tlink); 3107 xid = get_xid(); 3108 3109 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3110 access_flags |= WRITE_OWNER; 3111 if (aclflag & CIFS_ACL_SACL) 3112 access_flags |= SYSTEM_SECURITY; 3113 if (aclflag & CIFS_ACL_DACL) 3114 access_flags |= WRITE_DAC; 3115 3116 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3117 if (!utf16_path) { 3118 rc = -ENOMEM; 3119 free_xid(xid); 3120 return rc; 3121 } 3122 3123 oparms = (struct cifs_open_parms) { 3124 .tcon = tcon, 3125 .desired_access = access_flags, 3126 .create_options = cifs_create_options(cifs_sb, 0), 3127 .disposition = FILE_OPEN, 3128 .path = path, 3129 .fid = &fid, 3130 }; 3131 3132 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3133 NULL, NULL); 3134 kfree(utf16_path); 3135 if (!rc) { 3136 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3137 fid.volatile_fid, pnntsd, acllen, aclflag); 3138 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3139 } 3140 3141 cifs_put_tlink(tlink); 3142 free_xid(xid); 3143 return rc; 3144 } 3145 3146 /* Retrieve an ACL from the server */ 3147 static struct cifs_ntsd * 3148 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3149 struct inode *inode, const char *path, 3150 u32 *pacllen, u32 info) 3151 { 3152 struct cifs_ntsd *pntsd = NULL; 3153 struct cifsFileInfo *open_file = NULL; 3154 3155 if (inode && !(info & SACL_SECINFO)) 3156 open_file = find_readable_file(CIFS_I(inode), true); 3157 if (!open_file || (info & SACL_SECINFO)) 3158 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3159 3160 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3161 cifsFileInfo_put(open_file); 3162 return pntsd; 3163 } 3164 3165 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3166 loff_t offset, loff_t len, unsigned int xid) 3167 { 3168 struct cifsFileInfo *cfile = file->private_data; 3169 struct file_zero_data_information fsctl_buf; 3170 3171 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3172 3173 fsctl_buf.FileOffset = cpu_to_le64(offset); 3174 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3175 3176 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3177 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3178 (char *)&fsctl_buf, 3179 sizeof(struct file_zero_data_information), 3180 0, NULL, NULL); 3181 } 3182 3183 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3184 loff_t offset, loff_t len, bool keep_size) 3185 { 3186 struct cifs_ses *ses = tcon->ses; 3187 struct inode *inode = file_inode(file); 3188 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3189 struct cifsFileInfo *cfile = file->private_data; 3190 unsigned long long new_size; 3191 long rc; 3192 unsigned int xid; 3193 3194 xid = get_xid(); 3195 3196 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3197 ses->Suid, offset, len); 3198 3199 inode_lock(inode); 3200 filemap_invalidate_lock(inode->i_mapping); 3201 3202 /* 3203 * We zero the range through ioctl, so we need remove the page caches 3204 * first, otherwise the data may be inconsistent with the server. 3205 */ 3206 truncate_pagecache_range(inode, offset, offset + len - 1); 3207 3208 /* if file not oplocked can't be sure whether asking to extend size */ 3209 rc = -EOPNOTSUPP; 3210 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3211 goto zero_range_exit; 3212 3213 rc = smb3_zero_data(file, tcon, offset, len, xid); 3214 if (rc < 0) 3215 goto zero_range_exit; 3216 3217 /* 3218 * do we also need to change the size of the file? 3219 */ 3220 new_size = offset + len; 3221 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3222 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3223 cfile->fid.volatile_fid, cfile->pid, new_size); 3224 if (rc >= 0) { 3225 truncate_setsize(inode, new_size); 3226 netfs_resize_file(&cifsi->netfs, new_size, true); 3227 if (offset < cifsi->netfs.zero_point) 3228 cifsi->netfs.zero_point = offset; 3229 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3230 } 3231 } 3232 3233 zero_range_exit: 3234 filemap_invalidate_unlock(inode->i_mapping); 3235 inode_unlock(inode); 3236 free_xid(xid); 3237 if (rc) 3238 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3239 ses->Suid, offset, len, rc); 3240 else 3241 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3242 ses->Suid, offset, len); 3243 return rc; 3244 } 3245 3246 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3247 loff_t offset, loff_t len) 3248 { 3249 struct inode *inode = file_inode(file); 3250 struct cifsFileInfo *cfile = file->private_data; 3251 struct file_zero_data_information fsctl_buf; 3252 long rc; 3253 unsigned int xid; 3254 __u8 set_sparse = 1; 3255 3256 xid = get_xid(); 3257 3258 inode_lock(inode); 3259 /* Need to make file sparse, if not already, before freeing range. */ 3260 /* Consider adding equivalent for compressed since it could also work */ 3261 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3262 rc = -EOPNOTSUPP; 3263 goto out; 3264 } 3265 3266 filemap_invalidate_lock(inode->i_mapping); 3267 /* 3268 * We implement the punch hole through ioctl, so we need remove the page 3269 * caches first, otherwise the data may be inconsistent with the server. 3270 */ 3271 truncate_pagecache_range(inode, offset, offset + len - 1); 3272 3273 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3274 3275 fsctl_buf.FileOffset = cpu_to_le64(offset); 3276 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3277 3278 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3279 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3280 (char *)&fsctl_buf, 3281 sizeof(struct file_zero_data_information), 3282 CIFSMaxBufSize, NULL, NULL); 3283 filemap_invalidate_unlock(inode->i_mapping); 3284 out: 3285 inode_unlock(inode); 3286 free_xid(xid); 3287 return rc; 3288 } 3289 3290 static int smb3_simple_fallocate_write_range(unsigned int xid, 3291 struct cifs_tcon *tcon, 3292 struct cifsFileInfo *cfile, 3293 loff_t off, loff_t len, 3294 char *buf) 3295 { 3296 struct cifs_io_parms io_parms = {0}; 3297 int nbytes; 3298 int rc = 0; 3299 struct kvec iov[2]; 3300 3301 io_parms.netfid = cfile->fid.netfid; 3302 io_parms.pid = current->tgid; 3303 io_parms.tcon = tcon; 3304 io_parms.persistent_fid = cfile->fid.persistent_fid; 3305 io_parms.volatile_fid = cfile->fid.volatile_fid; 3306 3307 while (len) { 3308 io_parms.offset = off; 3309 io_parms.length = len; 3310 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3311 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3312 /* iov[0] is reserved for smb header */ 3313 iov[1].iov_base = buf; 3314 iov[1].iov_len = io_parms.length; 3315 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3316 if (rc) 3317 break; 3318 if (nbytes > len) 3319 return -EINVAL; 3320 buf += nbytes; 3321 off += nbytes; 3322 len -= nbytes; 3323 } 3324 return rc; 3325 } 3326 3327 static int smb3_simple_fallocate_range(unsigned int xid, 3328 struct cifs_tcon *tcon, 3329 struct cifsFileInfo *cfile, 3330 loff_t off, loff_t len) 3331 { 3332 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3333 u32 out_data_len; 3334 char *buf = NULL; 3335 loff_t l; 3336 int rc; 3337 3338 in_data.file_offset = cpu_to_le64(off); 3339 in_data.length = cpu_to_le64(len); 3340 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3341 cfile->fid.volatile_fid, 3342 FSCTL_QUERY_ALLOCATED_RANGES, 3343 (char *)&in_data, sizeof(in_data), 3344 1024 * sizeof(struct file_allocated_range_buffer), 3345 (char **)&out_data, &out_data_len); 3346 if (rc) 3347 goto out; 3348 3349 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3350 if (buf == NULL) { 3351 rc = -ENOMEM; 3352 goto out; 3353 } 3354 3355 tmp_data = out_data; 3356 while (len) { 3357 /* 3358 * The rest of the region is unmapped so write it all. 3359 */ 3360 if (out_data_len == 0) { 3361 rc = smb3_simple_fallocate_write_range(xid, tcon, 3362 cfile, off, len, buf); 3363 goto out; 3364 } 3365 3366 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3367 rc = -EINVAL; 3368 goto out; 3369 } 3370 3371 if (off < le64_to_cpu(tmp_data->file_offset)) { 3372 /* 3373 * We are at a hole. Write until the end of the region 3374 * or until the next allocated data, 3375 * whichever comes next. 3376 */ 3377 l = le64_to_cpu(tmp_data->file_offset) - off; 3378 if (len < l) 3379 l = len; 3380 rc = smb3_simple_fallocate_write_range(xid, tcon, 3381 cfile, off, l, buf); 3382 if (rc) 3383 goto out; 3384 off = off + l; 3385 len = len - l; 3386 if (len == 0) 3387 goto out; 3388 } 3389 /* 3390 * We are at a section of allocated data, just skip forward 3391 * until the end of the data or the end of the region 3392 * we are supposed to fallocate, whichever comes first. 3393 */ 3394 l = le64_to_cpu(tmp_data->length); 3395 if (len < l) 3396 l = len; 3397 off += l; 3398 len -= l; 3399 3400 tmp_data = &tmp_data[1]; 3401 out_data_len -= sizeof(struct file_allocated_range_buffer); 3402 } 3403 3404 out: 3405 kfree(out_data); 3406 kfree(buf); 3407 return rc; 3408 } 3409 3410 3411 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3412 loff_t off, loff_t len, bool keep_size) 3413 { 3414 struct inode *inode; 3415 struct cifsInodeInfo *cifsi; 3416 struct cifsFileInfo *cfile = file->private_data; 3417 long rc = -EOPNOTSUPP; 3418 unsigned int xid; 3419 loff_t new_eof; 3420 3421 xid = get_xid(); 3422 3423 inode = d_inode(cfile->dentry); 3424 cifsi = CIFS_I(inode); 3425 3426 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3427 tcon->ses->Suid, off, len); 3428 /* if file not oplocked can't be sure whether asking to extend size */ 3429 if (!CIFS_CACHE_READ(cifsi)) 3430 if (keep_size == false) { 3431 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3432 tcon->tid, tcon->ses->Suid, off, len, rc); 3433 free_xid(xid); 3434 return rc; 3435 } 3436 3437 /* 3438 * Extending the file 3439 */ 3440 if ((keep_size == false) && i_size_read(inode) < off + len) { 3441 rc = inode_newsize_ok(inode, off + len); 3442 if (rc) 3443 goto out; 3444 3445 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3446 smb2_set_sparse(xid, tcon, cfile, inode, false); 3447 3448 new_eof = off + len; 3449 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3450 cfile->fid.volatile_fid, cfile->pid, new_eof); 3451 if (rc == 0) { 3452 netfs_resize_file(&cifsi->netfs, new_eof, true); 3453 cifs_setsize(inode, new_eof); 3454 cifs_truncate_page(inode->i_mapping, inode->i_size); 3455 truncate_setsize(inode, new_eof); 3456 } 3457 goto out; 3458 } 3459 3460 /* 3461 * Files are non-sparse by default so falloc may be a no-op 3462 * Must check if file sparse. If not sparse, and since we are not 3463 * extending then no need to do anything since file already allocated 3464 */ 3465 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3466 rc = 0; 3467 goto out; 3468 } 3469 3470 if (keep_size == true) { 3471 /* 3472 * We can not preallocate pages beyond the end of the file 3473 * in SMB2 3474 */ 3475 if (off >= i_size_read(inode)) { 3476 rc = 0; 3477 goto out; 3478 } 3479 /* 3480 * For fallocates that are partially beyond the end of file, 3481 * clamp len so we only fallocate up to the end of file. 3482 */ 3483 if (off + len > i_size_read(inode)) { 3484 len = i_size_read(inode) - off; 3485 } 3486 } 3487 3488 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3489 /* 3490 * At this point, we are trying to fallocate an internal 3491 * regions of a sparse file. Since smb2 does not have a 3492 * fallocate command we have two otions on how to emulate this. 3493 * We can either turn the entire file to become non-sparse 3494 * which we only do if the fallocate is for virtually 3495 * the whole file, or we can overwrite the region with zeroes 3496 * using SMB2_write, which could be prohibitevly expensive 3497 * if len is large. 3498 */ 3499 /* 3500 * We are only trying to fallocate a small region so 3501 * just write it with zero. 3502 */ 3503 if (len <= 1024 * 1024) { 3504 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3505 off, len); 3506 goto out; 3507 } 3508 3509 /* 3510 * Check if falloc starts within first few pages of file 3511 * and ends within a few pages of the end of file to 3512 * ensure that most of file is being forced to be 3513 * fallocated now. If so then setting whole file sparse 3514 * ie potentially making a few extra pages at the beginning 3515 * or end of the file non-sparse via set_sparse is harmless. 3516 */ 3517 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3518 rc = -EOPNOTSUPP; 3519 goto out; 3520 } 3521 } 3522 3523 smb2_set_sparse(xid, tcon, cfile, inode, false); 3524 rc = 0; 3525 3526 out: 3527 if (rc) 3528 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3529 tcon->ses->Suid, off, len, rc); 3530 else 3531 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3532 tcon->ses->Suid, off, len); 3533 3534 free_xid(xid); 3535 return rc; 3536 } 3537 3538 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3539 loff_t off, loff_t len) 3540 { 3541 int rc; 3542 unsigned int xid; 3543 struct inode *inode = file_inode(file); 3544 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3545 struct cifsFileInfo *cfile = file->private_data; 3546 struct netfs_inode *ictx = &cifsi->netfs; 3547 loff_t old_eof, new_eof; 3548 3549 xid = get_xid(); 3550 3551 inode_lock(inode); 3552 3553 old_eof = i_size_read(inode); 3554 if ((off >= old_eof) || 3555 off + len >= old_eof) { 3556 rc = -EINVAL; 3557 goto out; 3558 } 3559 3560 filemap_invalidate_lock(inode->i_mapping); 3561 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3562 if (rc < 0) 3563 goto out_2; 3564 3565 truncate_pagecache_range(inode, off, old_eof); 3566 ictx->zero_point = old_eof; 3567 3568 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3569 old_eof - off - len, off); 3570 if (rc < 0) 3571 goto out_2; 3572 3573 new_eof = old_eof - len; 3574 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3575 cfile->fid.volatile_fid, cfile->pid, new_eof); 3576 if (rc < 0) 3577 goto out_2; 3578 3579 rc = 0; 3580 3581 truncate_setsize(inode, new_eof); 3582 netfs_resize_file(&cifsi->netfs, new_eof, true); 3583 ictx->zero_point = new_eof; 3584 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3585 out_2: 3586 filemap_invalidate_unlock(inode->i_mapping); 3587 out: 3588 inode_unlock(inode); 3589 free_xid(xid); 3590 return rc; 3591 } 3592 3593 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3594 loff_t off, loff_t len) 3595 { 3596 int rc; 3597 unsigned int xid; 3598 struct cifsFileInfo *cfile = file->private_data; 3599 struct inode *inode = file_inode(file); 3600 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3601 __u64 count, old_eof, new_eof; 3602 3603 xid = get_xid(); 3604 3605 inode_lock(inode); 3606 3607 old_eof = i_size_read(inode); 3608 if (off >= old_eof) { 3609 rc = -EINVAL; 3610 goto out; 3611 } 3612 3613 count = old_eof - off; 3614 new_eof = old_eof + len; 3615 3616 filemap_invalidate_lock(inode->i_mapping); 3617 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3618 if (rc < 0) 3619 goto out_2; 3620 truncate_pagecache_range(inode, off, old_eof); 3621 3622 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3623 cfile->fid.volatile_fid, cfile->pid, new_eof); 3624 if (rc < 0) 3625 goto out_2; 3626 3627 truncate_setsize(inode, new_eof); 3628 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3629 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3630 3631 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3632 if (rc < 0) 3633 goto out_2; 3634 3635 rc = smb3_zero_data(file, tcon, off, len, xid); 3636 if (rc < 0) 3637 goto out_2; 3638 3639 rc = 0; 3640 out_2: 3641 filemap_invalidate_unlock(inode->i_mapping); 3642 out: 3643 inode_unlock(inode); 3644 free_xid(xid); 3645 return rc; 3646 } 3647 3648 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3649 { 3650 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3651 struct cifsInodeInfo *cifsi; 3652 struct inode *inode; 3653 int rc = 0; 3654 struct file_allocated_range_buffer in_data, *out_data = NULL; 3655 u32 out_data_len; 3656 unsigned int xid; 3657 3658 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3659 return generic_file_llseek(file, offset, whence); 3660 3661 inode = d_inode(cfile->dentry); 3662 cifsi = CIFS_I(inode); 3663 3664 if (offset < 0 || offset >= i_size_read(inode)) 3665 return -ENXIO; 3666 3667 xid = get_xid(); 3668 /* 3669 * We need to be sure that all dirty pages are written as they 3670 * might fill holes on the server. 3671 * Note that we also MUST flush any written pages since at least 3672 * some servers (Windows2016) will not reflect recent writes in 3673 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3674 */ 3675 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3676 if (wrcfile) { 3677 filemap_write_and_wait(inode->i_mapping); 3678 smb2_flush_file(xid, tcon, &wrcfile->fid); 3679 cifsFileInfo_put(wrcfile); 3680 } 3681 3682 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3683 if (whence == SEEK_HOLE) 3684 offset = i_size_read(inode); 3685 goto lseek_exit; 3686 } 3687 3688 in_data.file_offset = cpu_to_le64(offset); 3689 in_data.length = cpu_to_le64(i_size_read(inode)); 3690 3691 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3692 cfile->fid.volatile_fid, 3693 FSCTL_QUERY_ALLOCATED_RANGES, 3694 (char *)&in_data, sizeof(in_data), 3695 sizeof(struct file_allocated_range_buffer), 3696 (char **)&out_data, &out_data_len); 3697 if (rc == -E2BIG) 3698 rc = 0; 3699 if (rc) 3700 goto lseek_exit; 3701 3702 if (whence == SEEK_HOLE && out_data_len == 0) 3703 goto lseek_exit; 3704 3705 if (whence == SEEK_DATA && out_data_len == 0) { 3706 rc = -ENXIO; 3707 goto lseek_exit; 3708 } 3709 3710 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3711 rc = -EINVAL; 3712 goto lseek_exit; 3713 } 3714 if (whence == SEEK_DATA) { 3715 offset = le64_to_cpu(out_data->file_offset); 3716 goto lseek_exit; 3717 } 3718 if (offset < le64_to_cpu(out_data->file_offset)) 3719 goto lseek_exit; 3720 3721 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3722 3723 lseek_exit: 3724 free_xid(xid); 3725 kfree(out_data); 3726 if (!rc) 3727 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3728 else 3729 return rc; 3730 } 3731 3732 static int smb3_fiemap(struct cifs_tcon *tcon, 3733 struct cifsFileInfo *cfile, 3734 struct fiemap_extent_info *fei, u64 start, u64 len) 3735 { 3736 unsigned int xid; 3737 struct file_allocated_range_buffer in_data, *out_data; 3738 u32 out_data_len; 3739 int i, num, rc, flags, last_blob; 3740 u64 next; 3741 3742 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3743 if (rc) 3744 return rc; 3745 3746 xid = get_xid(); 3747 again: 3748 in_data.file_offset = cpu_to_le64(start); 3749 in_data.length = cpu_to_le64(len); 3750 3751 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3752 cfile->fid.volatile_fid, 3753 FSCTL_QUERY_ALLOCATED_RANGES, 3754 (char *)&in_data, sizeof(in_data), 3755 1024 * sizeof(struct file_allocated_range_buffer), 3756 (char **)&out_data, &out_data_len); 3757 if (rc == -E2BIG) { 3758 last_blob = 0; 3759 rc = 0; 3760 } else 3761 last_blob = 1; 3762 if (rc) 3763 goto out; 3764 3765 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3766 rc = -EINVAL; 3767 goto out; 3768 } 3769 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3770 rc = -EINVAL; 3771 goto out; 3772 } 3773 3774 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3775 for (i = 0; i < num; i++) { 3776 flags = 0; 3777 if (i == num - 1 && last_blob) 3778 flags |= FIEMAP_EXTENT_LAST; 3779 3780 rc = fiemap_fill_next_extent(fei, 3781 le64_to_cpu(out_data[i].file_offset), 3782 le64_to_cpu(out_data[i].file_offset), 3783 le64_to_cpu(out_data[i].length), 3784 flags); 3785 if (rc < 0) 3786 goto out; 3787 if (rc == 1) { 3788 rc = 0; 3789 goto out; 3790 } 3791 } 3792 3793 if (!last_blob) { 3794 next = le64_to_cpu(out_data[num - 1].file_offset) + 3795 le64_to_cpu(out_data[num - 1].length); 3796 len = len - (next - start); 3797 start = next; 3798 goto again; 3799 } 3800 3801 out: 3802 free_xid(xid); 3803 kfree(out_data); 3804 return rc; 3805 } 3806 3807 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3808 loff_t off, loff_t len) 3809 { 3810 /* KEEP_SIZE already checked for by do_fallocate */ 3811 if (mode & FALLOC_FL_PUNCH_HOLE) 3812 return smb3_punch_hole(file, tcon, off, len); 3813 else if (mode & FALLOC_FL_ZERO_RANGE) { 3814 if (mode & FALLOC_FL_KEEP_SIZE) 3815 return smb3_zero_range(file, tcon, off, len, true); 3816 return smb3_zero_range(file, tcon, off, len, false); 3817 } else if (mode == FALLOC_FL_KEEP_SIZE) 3818 return smb3_simple_falloc(file, tcon, off, len, true); 3819 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3820 return smb3_collapse_range(file, tcon, off, len); 3821 else if (mode == FALLOC_FL_INSERT_RANGE) 3822 return smb3_insert_range(file, tcon, off, len); 3823 else if (mode == 0) 3824 return smb3_simple_falloc(file, tcon, off, len, false); 3825 3826 return -EOPNOTSUPP; 3827 } 3828 3829 static void 3830 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3831 struct cifsInodeInfo *cinode, __u32 oplock, 3832 unsigned int epoch, bool *purge_cache) 3833 { 3834 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3835 } 3836 3837 static void 3838 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3839 unsigned int epoch, bool *purge_cache); 3840 3841 static void 3842 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3843 struct cifsInodeInfo *cinode, __u32 oplock, 3844 unsigned int epoch, bool *purge_cache) 3845 { 3846 unsigned int old_state = cinode->oplock; 3847 unsigned int old_epoch = cinode->epoch; 3848 unsigned int new_state; 3849 3850 if (epoch > old_epoch) { 3851 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3852 cinode->epoch = epoch; 3853 } 3854 3855 new_state = cinode->oplock; 3856 *purge_cache = false; 3857 3858 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3859 (new_state & CIFS_CACHE_READ_FLG) == 0) 3860 *purge_cache = true; 3861 else if (old_state == new_state && (epoch - old_epoch > 1)) 3862 *purge_cache = true; 3863 } 3864 3865 static void 3866 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3867 unsigned int epoch, bool *purge_cache) 3868 { 3869 oplock &= 0xFF; 3870 cinode->lease_granted = false; 3871 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3872 return; 3873 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3874 cinode->oplock = CIFS_CACHE_RHW_FLG; 3875 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3876 &cinode->netfs.inode); 3877 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3878 cinode->oplock = CIFS_CACHE_RW_FLG; 3879 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3880 &cinode->netfs.inode); 3881 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3882 cinode->oplock = CIFS_CACHE_READ_FLG; 3883 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3884 &cinode->netfs.inode); 3885 } else 3886 cinode->oplock = 0; 3887 } 3888 3889 static void 3890 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3891 unsigned int epoch, bool *purge_cache) 3892 { 3893 char message[5] = {0}; 3894 unsigned int new_oplock = 0; 3895 3896 oplock &= 0xFF; 3897 cinode->lease_granted = true; 3898 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3899 return; 3900 3901 /* Check if the server granted an oplock rather than a lease */ 3902 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3903 return smb2_set_oplock_level(cinode, oplock, epoch, 3904 purge_cache); 3905 3906 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3907 new_oplock |= CIFS_CACHE_READ_FLG; 3908 strcat(message, "R"); 3909 } 3910 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3911 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3912 strcat(message, "H"); 3913 } 3914 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3915 new_oplock |= CIFS_CACHE_WRITE_FLG; 3916 strcat(message, "W"); 3917 } 3918 if (!new_oplock) 3919 strscpy(message, "None"); 3920 3921 cinode->oplock = new_oplock; 3922 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3923 &cinode->netfs.inode); 3924 } 3925 3926 static void 3927 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3928 unsigned int epoch, bool *purge_cache) 3929 { 3930 unsigned int old_oplock = cinode->oplock; 3931 3932 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3933 3934 if (purge_cache) { 3935 *purge_cache = false; 3936 if (old_oplock == CIFS_CACHE_READ_FLG) { 3937 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3938 (epoch - cinode->epoch > 0)) 3939 *purge_cache = true; 3940 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3941 (epoch - cinode->epoch > 1)) 3942 *purge_cache = true; 3943 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3944 (epoch - cinode->epoch > 1)) 3945 *purge_cache = true; 3946 else if (cinode->oplock == 0 && 3947 (epoch - cinode->epoch > 0)) 3948 *purge_cache = true; 3949 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3950 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3951 (epoch - cinode->epoch > 0)) 3952 *purge_cache = true; 3953 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3954 (epoch - cinode->epoch > 1)) 3955 *purge_cache = true; 3956 } 3957 cinode->epoch = epoch; 3958 } 3959 } 3960 3961 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3962 static bool 3963 smb2_is_read_op(__u32 oplock) 3964 { 3965 return oplock == SMB2_OPLOCK_LEVEL_II; 3966 } 3967 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 3968 3969 static bool 3970 smb21_is_read_op(__u32 oplock) 3971 { 3972 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 3973 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 3974 } 3975 3976 static __le32 3977 map_oplock_to_lease(u8 oplock) 3978 { 3979 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3980 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 3981 else if (oplock == SMB2_OPLOCK_LEVEL_II) 3982 return SMB2_LEASE_READ_CACHING_LE; 3983 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 3984 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 3985 SMB2_LEASE_WRITE_CACHING_LE; 3986 return 0; 3987 } 3988 3989 static char * 3990 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 3991 { 3992 struct create_lease *buf; 3993 3994 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 3995 if (!buf) 3996 return NULL; 3997 3998 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 3999 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4000 4001 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4002 (struct create_lease, lcontext)); 4003 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4004 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4005 (struct create_lease, Name)); 4006 buf->ccontext.NameLength = cpu_to_le16(4); 4007 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4008 buf->Name[0] = 'R'; 4009 buf->Name[1] = 'q'; 4010 buf->Name[2] = 'L'; 4011 buf->Name[3] = 's'; 4012 return (char *)buf; 4013 } 4014 4015 static char * 4016 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4017 { 4018 struct create_lease_v2 *buf; 4019 4020 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4021 if (!buf) 4022 return NULL; 4023 4024 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4025 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4026 4027 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4028 (struct create_lease_v2, lcontext)); 4029 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4030 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4031 (struct create_lease_v2, Name)); 4032 buf->ccontext.NameLength = cpu_to_le16(4); 4033 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4034 buf->Name[0] = 'R'; 4035 buf->Name[1] = 'q'; 4036 buf->Name[2] = 'L'; 4037 buf->Name[3] = 's'; 4038 return (char *)buf; 4039 } 4040 4041 static __u8 4042 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4043 { 4044 struct create_lease *lc = (struct create_lease *)buf; 4045 4046 *epoch = 0; /* not used */ 4047 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4048 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4049 return le32_to_cpu(lc->lcontext.LeaseState); 4050 } 4051 4052 static __u8 4053 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4054 { 4055 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4056 4057 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4058 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4059 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4060 if (lease_key) 4061 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4062 return le32_to_cpu(lc->lcontext.LeaseState); 4063 } 4064 4065 static unsigned int 4066 smb2_wp_retry_size(struct inode *inode) 4067 { 4068 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4069 SMB2_MAX_BUFFER_SIZE); 4070 } 4071 4072 static bool 4073 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4074 { 4075 return !cfile->invalidHandle; 4076 } 4077 4078 static void 4079 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4080 struct smb_rqst *old_rq, __le16 cipher_type) 4081 { 4082 struct smb2_hdr *shdr = 4083 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4084 4085 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4086 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4087 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4088 tr_hdr->Flags = cpu_to_le16(0x01); 4089 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4090 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4091 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4092 else 4093 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4094 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4095 } 4096 4097 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4098 int num_rqst, const u8 *sig, u8 **iv, 4099 struct aead_request **req, struct sg_table *sgt, 4100 unsigned int *num_sgs, size_t *sensitive_size) 4101 { 4102 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4103 unsigned int iv_size = crypto_aead_ivsize(tfm); 4104 unsigned int len; 4105 u8 *p; 4106 4107 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4108 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4109 return ERR_PTR(*num_sgs); 4110 4111 len = iv_size; 4112 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4113 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4114 len += req_size; 4115 len = ALIGN(len, __alignof__(struct scatterlist)); 4116 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4117 *sensitive_size = len; 4118 4119 p = kvzalloc(len, GFP_NOFS); 4120 if (!p) 4121 return ERR_PTR(-ENOMEM); 4122 4123 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4124 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4125 crypto_tfm_ctx_alignment()); 4126 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4127 __alignof__(struct scatterlist)); 4128 return p; 4129 } 4130 4131 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4132 int num_rqst, const u8 *sig, u8 **iv, 4133 struct aead_request **req, struct scatterlist **sgl, 4134 size_t *sensitive_size) 4135 { 4136 struct sg_table sgtable = {}; 4137 unsigned int skip, num_sgs, i, j; 4138 ssize_t rc; 4139 void *p; 4140 4141 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4142 &num_sgs, sensitive_size); 4143 if (IS_ERR(p)) 4144 return ERR_CAST(p); 4145 4146 sg_init_marker(sgtable.sgl, num_sgs); 4147 4148 /* 4149 * The first rqst has a transform header where the 4150 * first 20 bytes are not part of the encrypted blob. 4151 */ 4152 skip = 20; 4153 4154 for (i = 0; i < num_rqst; i++) { 4155 struct iov_iter *iter = &rqst[i].rq_iter; 4156 size_t count = iov_iter_count(iter); 4157 4158 for (j = 0; j < rqst[i].rq_nvec; j++) { 4159 cifs_sg_set_buf(&sgtable, 4160 rqst[i].rq_iov[j].iov_base + skip, 4161 rqst[i].rq_iov[j].iov_len - skip); 4162 4163 /* See the above comment on the 'skip' assignment */ 4164 skip = 0; 4165 } 4166 sgtable.orig_nents = sgtable.nents; 4167 4168 rc = extract_iter_to_sg(iter, count, &sgtable, 4169 num_sgs - sgtable.nents, 0); 4170 iov_iter_revert(iter, rc); 4171 sgtable.orig_nents = sgtable.nents; 4172 } 4173 4174 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4175 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4176 *sgl = sgtable.sgl; 4177 return p; 4178 } 4179 4180 static int 4181 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4182 { 4183 struct TCP_Server_Info *pserver; 4184 struct cifs_ses *ses; 4185 u8 *ses_enc_key; 4186 4187 /* If server is a channel, select the primary channel */ 4188 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4189 4190 spin_lock(&cifs_tcp_ses_lock); 4191 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4192 if (ses->Suid == ses_id) { 4193 spin_lock(&ses->ses_lock); 4194 ses_enc_key = enc ? ses->smb3encryptionkey : 4195 ses->smb3decryptionkey; 4196 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4197 spin_unlock(&ses->ses_lock); 4198 spin_unlock(&cifs_tcp_ses_lock); 4199 return 0; 4200 } 4201 } 4202 spin_unlock(&cifs_tcp_ses_lock); 4203 4204 trace_smb3_ses_not_found(ses_id); 4205 4206 return -EAGAIN; 4207 } 4208 /* 4209 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4210 * iov[0] - transform header (associate data), 4211 * iov[1-N] - SMB2 header and pages - data to encrypt. 4212 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4213 * untouched. 4214 */ 4215 static int 4216 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4217 struct smb_rqst *rqst, int enc) 4218 { 4219 struct smb2_transform_hdr *tr_hdr = 4220 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4221 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4222 int rc = 0; 4223 struct scatterlist *sg; 4224 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4225 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4226 struct aead_request *req; 4227 u8 *iv; 4228 DECLARE_CRYPTO_WAIT(wait); 4229 struct crypto_aead *tfm; 4230 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4231 void *creq; 4232 size_t sensitive_size; 4233 4234 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4235 if (rc) { 4236 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4237 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4238 return rc; 4239 } 4240 4241 rc = smb3_crypto_aead_allocate(server); 4242 if (rc) { 4243 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4244 return rc; 4245 } 4246 4247 tfm = enc ? server->secmech.enc : server->secmech.dec; 4248 4249 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4250 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4251 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4252 else 4253 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4254 4255 if (rc) { 4256 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4257 return rc; 4258 } 4259 4260 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4261 if (rc) { 4262 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4263 return rc; 4264 } 4265 4266 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4267 &sensitive_size); 4268 if (IS_ERR(creq)) 4269 return PTR_ERR(creq); 4270 4271 if (!enc) { 4272 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4273 crypt_len += SMB2_SIGNATURE_SIZE; 4274 } 4275 4276 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4277 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4278 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4279 else { 4280 iv[0] = 3; 4281 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4282 } 4283 4284 aead_request_set_tfm(req, tfm); 4285 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4286 aead_request_set_ad(req, assoc_data_len); 4287 4288 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4289 crypto_req_done, &wait); 4290 4291 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4292 : crypto_aead_decrypt(req), &wait); 4293 4294 if (!rc && enc) 4295 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4296 4297 kvfree_sensitive(creq, sensitive_size); 4298 return rc; 4299 } 4300 4301 /* 4302 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4303 */ 4304 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4305 { 4306 struct folio *folio; 4307 4308 XA_STATE(xas, buffer, 0); 4309 4310 rcu_read_lock(); 4311 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4312 folio_put(folio); 4313 } 4314 rcu_read_unlock(); 4315 xa_destroy(buffer); 4316 } 4317 4318 void 4319 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4320 { 4321 int i; 4322 4323 for (i = 0; i < num_rqst; i++) 4324 if (!xa_empty(&rqst[i].rq_buffer)) 4325 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4326 } 4327 4328 /* 4329 * This function will initialize new_rq and encrypt the content. 4330 * The first entry, new_rq[0], only contains a single iov which contains 4331 * a smb2_transform_hdr and is pre-allocated by the caller. 4332 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4333 * 4334 * The end result is an array of smb_rqst structures where the first structure 4335 * only contains a single iov for the transform header which we then can pass 4336 * to crypt_message(). 4337 * 4338 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4339 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4340 */ 4341 static int 4342 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4343 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4344 { 4345 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4346 struct page *page; 4347 unsigned int orig_len = 0; 4348 int i, j; 4349 int rc = -ENOMEM; 4350 4351 for (i = 1; i < num_rqst; i++) { 4352 struct smb_rqst *old = &old_rq[i - 1]; 4353 struct smb_rqst *new = &new_rq[i]; 4354 struct xarray *buffer = &new->rq_buffer; 4355 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4356 4357 orig_len += smb_rqst_len(server, old); 4358 new->rq_iov = old->rq_iov; 4359 new->rq_nvec = old->rq_nvec; 4360 4361 xa_init(buffer); 4362 4363 if (size > 0) { 4364 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4365 4366 for (j = 0; j < npages; j++) { 4367 void *o; 4368 4369 rc = -ENOMEM; 4370 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4371 if (!page) 4372 goto err_free; 4373 page->index = j; 4374 o = xa_store(buffer, j, page, GFP_KERNEL); 4375 if (xa_is_err(o)) { 4376 rc = xa_err(o); 4377 put_page(page); 4378 goto err_free; 4379 } 4380 4381 xa_set_mark(buffer, j, XA_MARK_0); 4382 4383 seg = min_t(size_t, size - copied, PAGE_SIZE); 4384 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4385 rc = -EFAULT; 4386 goto err_free; 4387 } 4388 copied += seg; 4389 } 4390 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4391 buffer, 0, size); 4392 new->rq_iter_size = size; 4393 } 4394 } 4395 4396 /* fill the 1st iov with a transform header */ 4397 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4398 4399 rc = crypt_message(server, num_rqst, new_rq, 1); 4400 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4401 if (rc) 4402 goto err_free; 4403 4404 return rc; 4405 4406 err_free: 4407 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4408 return rc; 4409 } 4410 4411 static int 4412 smb3_is_transform_hdr(void *buf) 4413 { 4414 struct smb2_transform_hdr *trhdr = buf; 4415 4416 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4417 } 4418 4419 static int 4420 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4421 unsigned int buf_data_size, struct iov_iter *iter, 4422 bool is_offloaded) 4423 { 4424 struct kvec iov[2]; 4425 struct smb_rqst rqst = {NULL}; 4426 size_t iter_size = 0; 4427 int rc; 4428 4429 iov[0].iov_base = buf; 4430 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4431 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4432 iov[1].iov_len = buf_data_size; 4433 4434 rqst.rq_iov = iov; 4435 rqst.rq_nvec = 2; 4436 if (iter) { 4437 rqst.rq_iter = *iter; 4438 rqst.rq_iter_size = iov_iter_count(iter); 4439 iter_size = iov_iter_count(iter); 4440 } 4441 4442 rc = crypt_message(server, 1, &rqst, 0); 4443 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4444 4445 if (rc) 4446 return rc; 4447 4448 memmove(buf, iov[1].iov_base, buf_data_size); 4449 4450 if (!is_offloaded) 4451 server->total_read = buf_data_size + iter_size; 4452 4453 return rc; 4454 } 4455 4456 static int 4457 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4458 unsigned int skip, struct iov_iter *iter) 4459 { 4460 struct page *page; 4461 unsigned long index; 4462 4463 xa_for_each(pages, index, page) { 4464 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4465 4466 n = copy_page_to_iter(page, skip, len, iter); 4467 if (n != len) { 4468 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4469 return -EIO; 4470 } 4471 data_size -= n; 4472 skip = 0; 4473 } 4474 4475 return 0; 4476 } 4477 4478 static int 4479 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4480 char *buf, unsigned int buf_len, struct xarray *pages, 4481 unsigned int pages_len, bool is_offloaded) 4482 { 4483 unsigned int data_offset; 4484 unsigned int data_len; 4485 unsigned int cur_off; 4486 unsigned int cur_page_idx; 4487 unsigned int pad_len; 4488 struct cifs_readdata *rdata = mid->callback_data; 4489 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4490 int length; 4491 bool use_rdma_mr = false; 4492 4493 if (shdr->Command != SMB2_READ) { 4494 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4495 return -EOPNOTSUPP; 4496 } 4497 4498 if (server->ops->is_session_expired && 4499 server->ops->is_session_expired(buf)) { 4500 if (!is_offloaded) 4501 cifs_reconnect(server, true); 4502 return -1; 4503 } 4504 4505 if (server->ops->is_status_pending && 4506 server->ops->is_status_pending(buf, server)) 4507 return -1; 4508 4509 /* set up first two iov to get credits */ 4510 rdata->iov[0].iov_base = buf; 4511 rdata->iov[0].iov_len = 0; 4512 rdata->iov[1].iov_base = buf; 4513 rdata->iov[1].iov_len = 4514 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4515 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4516 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4517 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4518 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4519 4520 rdata->result = server->ops->map_error(buf, true); 4521 if (rdata->result != 0) { 4522 cifs_dbg(FYI, "%s: server returned error %d\n", 4523 __func__, rdata->result); 4524 /* normal error on read response */ 4525 if (is_offloaded) 4526 mid->mid_state = MID_RESPONSE_RECEIVED; 4527 else 4528 dequeue_mid(mid, false); 4529 return 0; 4530 } 4531 4532 data_offset = server->ops->read_data_offset(buf); 4533 #ifdef CONFIG_CIFS_SMB_DIRECT 4534 use_rdma_mr = rdata->mr; 4535 #endif 4536 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4537 4538 if (data_offset < server->vals->read_rsp_size) { 4539 /* 4540 * win2k8 sometimes sends an offset of 0 when the read 4541 * is beyond the EOF. Treat it as if the data starts just after 4542 * the header. 4543 */ 4544 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4545 __func__, data_offset); 4546 data_offset = server->vals->read_rsp_size; 4547 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4548 /* data_offset is beyond the end of smallbuf */ 4549 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4550 __func__, data_offset); 4551 rdata->result = -EIO; 4552 if (is_offloaded) 4553 mid->mid_state = MID_RESPONSE_MALFORMED; 4554 else 4555 dequeue_mid(mid, rdata->result); 4556 return 0; 4557 } 4558 4559 pad_len = data_offset - server->vals->read_rsp_size; 4560 4561 if (buf_len <= data_offset) { 4562 /* read response payload is in pages */ 4563 cur_page_idx = pad_len / PAGE_SIZE; 4564 cur_off = pad_len % PAGE_SIZE; 4565 4566 if (cur_page_idx != 0) { 4567 /* data offset is beyond the 1st page of response */ 4568 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4569 __func__, data_offset); 4570 rdata->result = -EIO; 4571 if (is_offloaded) 4572 mid->mid_state = MID_RESPONSE_MALFORMED; 4573 else 4574 dequeue_mid(mid, rdata->result); 4575 return 0; 4576 } 4577 4578 if (data_len > pages_len - pad_len) { 4579 /* data_len is corrupt -- discard frame */ 4580 rdata->result = -EIO; 4581 if (is_offloaded) 4582 mid->mid_state = MID_RESPONSE_MALFORMED; 4583 else 4584 dequeue_mid(mid, rdata->result); 4585 return 0; 4586 } 4587 4588 /* Copy the data to the output I/O iterator. */ 4589 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4590 cur_off, &rdata->iter); 4591 if (rdata->result != 0) { 4592 if (is_offloaded) 4593 mid->mid_state = MID_RESPONSE_MALFORMED; 4594 else 4595 dequeue_mid(mid, rdata->result); 4596 return 0; 4597 } 4598 rdata->got_bytes = pages_len; 4599 4600 } else if (buf_len >= data_offset + data_len) { 4601 /* read response payload is in buf */ 4602 WARN_ONCE(pages && !xa_empty(pages), 4603 "read data can be either in buf or in pages"); 4604 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4605 if (length < 0) 4606 return length; 4607 rdata->got_bytes = data_len; 4608 } else { 4609 /* read response payload cannot be in both buf and pages */ 4610 WARN_ONCE(1, "buf can not contain only a part of read data"); 4611 rdata->result = -EIO; 4612 if (is_offloaded) 4613 mid->mid_state = MID_RESPONSE_MALFORMED; 4614 else 4615 dequeue_mid(mid, rdata->result); 4616 return 0; 4617 } 4618 4619 if (is_offloaded) 4620 mid->mid_state = MID_RESPONSE_RECEIVED; 4621 else 4622 dequeue_mid(mid, false); 4623 return 0; 4624 } 4625 4626 struct smb2_decrypt_work { 4627 struct work_struct decrypt; 4628 struct TCP_Server_Info *server; 4629 struct xarray buffer; 4630 char *buf; 4631 unsigned int len; 4632 }; 4633 4634 4635 static void smb2_decrypt_offload(struct work_struct *work) 4636 { 4637 struct smb2_decrypt_work *dw = container_of(work, 4638 struct smb2_decrypt_work, decrypt); 4639 int rc; 4640 struct mid_q_entry *mid; 4641 struct iov_iter iter; 4642 4643 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4644 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4645 &iter, true); 4646 if (rc) { 4647 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4648 goto free_pages; 4649 } 4650 4651 dw->server->lstrp = jiffies; 4652 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4653 if (mid == NULL) 4654 cifs_dbg(FYI, "mid not found\n"); 4655 else { 4656 mid->decrypted = true; 4657 rc = handle_read_data(dw->server, mid, dw->buf, 4658 dw->server->vals->read_rsp_size, 4659 &dw->buffer, dw->len, 4660 true); 4661 if (rc >= 0) { 4662 #ifdef CONFIG_CIFS_STATS2 4663 mid->when_received = jiffies; 4664 #endif 4665 if (dw->server->ops->is_network_name_deleted) 4666 dw->server->ops->is_network_name_deleted(dw->buf, 4667 dw->server); 4668 4669 mid->callback(mid); 4670 } else { 4671 spin_lock(&dw->server->srv_lock); 4672 if (dw->server->tcpStatus == CifsNeedReconnect) { 4673 spin_lock(&dw->server->mid_lock); 4674 mid->mid_state = MID_RETRY_NEEDED; 4675 spin_unlock(&dw->server->mid_lock); 4676 spin_unlock(&dw->server->srv_lock); 4677 mid->callback(mid); 4678 } else { 4679 spin_lock(&dw->server->mid_lock); 4680 mid->mid_state = MID_REQUEST_SUBMITTED; 4681 mid->mid_flags &= ~(MID_DELETED); 4682 list_add_tail(&mid->qhead, 4683 &dw->server->pending_mid_q); 4684 spin_unlock(&dw->server->mid_lock); 4685 spin_unlock(&dw->server->srv_lock); 4686 } 4687 } 4688 release_mid(mid); 4689 } 4690 4691 free_pages: 4692 cifs_clear_xarray_buffer(&dw->buffer); 4693 cifs_small_buf_release(dw->buf); 4694 kfree(dw); 4695 } 4696 4697 4698 static int 4699 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4700 int *num_mids) 4701 { 4702 struct page *page; 4703 char *buf = server->smallbuf; 4704 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4705 struct iov_iter iter; 4706 unsigned int len, npages; 4707 unsigned int buflen = server->pdu_size; 4708 int rc; 4709 int i = 0; 4710 struct smb2_decrypt_work *dw; 4711 4712 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4713 if (!dw) 4714 return -ENOMEM; 4715 xa_init(&dw->buffer); 4716 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4717 dw->server = server; 4718 4719 *num_mids = 1; 4720 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4721 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4722 4723 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4724 if (rc < 0) 4725 goto free_dw; 4726 server->total_read += rc; 4727 4728 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4729 server->vals->read_rsp_size; 4730 dw->len = len; 4731 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4732 4733 rc = -ENOMEM; 4734 for (; i < npages; i++) { 4735 void *old; 4736 4737 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4738 if (!page) 4739 goto discard_data; 4740 page->index = i; 4741 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4742 if (xa_is_err(old)) { 4743 rc = xa_err(old); 4744 put_page(page); 4745 goto discard_data; 4746 } 4747 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4748 } 4749 4750 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4751 4752 /* Read the data into the buffer and clear excess bufferage. */ 4753 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4754 if (rc < 0) 4755 goto discard_data; 4756 4757 server->total_read += rc; 4758 if (rc < npages * PAGE_SIZE) 4759 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4760 iov_iter_revert(&iter, npages * PAGE_SIZE); 4761 iov_iter_truncate(&iter, dw->len); 4762 4763 rc = cifs_discard_remaining_data(server); 4764 if (rc) 4765 goto free_pages; 4766 4767 /* 4768 * For large reads, offload to different thread for better performance, 4769 * use more cores decrypting which can be expensive 4770 */ 4771 4772 if ((server->min_offload) && (server->in_flight > 1) && 4773 (server->pdu_size >= server->min_offload)) { 4774 dw->buf = server->smallbuf; 4775 server->smallbuf = (char *)cifs_small_buf_get(); 4776 4777 queue_work(decrypt_wq, &dw->decrypt); 4778 *num_mids = 0; /* worker thread takes care of finding mid */ 4779 return -1; 4780 } 4781 4782 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4783 &iter, false); 4784 if (rc) 4785 goto free_pages; 4786 4787 *mid = smb2_find_mid(server, buf); 4788 if (*mid == NULL) { 4789 cifs_dbg(FYI, "mid not found\n"); 4790 } else { 4791 cifs_dbg(FYI, "mid found\n"); 4792 (*mid)->decrypted = true; 4793 rc = handle_read_data(server, *mid, buf, 4794 server->vals->read_rsp_size, 4795 &dw->buffer, dw->len, false); 4796 if (rc >= 0) { 4797 if (server->ops->is_network_name_deleted) { 4798 server->ops->is_network_name_deleted(buf, 4799 server); 4800 } 4801 } 4802 } 4803 4804 free_pages: 4805 cifs_clear_xarray_buffer(&dw->buffer); 4806 free_dw: 4807 kfree(dw); 4808 return rc; 4809 discard_data: 4810 cifs_discard_remaining_data(server); 4811 goto free_pages; 4812 } 4813 4814 static int 4815 receive_encrypted_standard(struct TCP_Server_Info *server, 4816 struct mid_q_entry **mids, char **bufs, 4817 int *num_mids) 4818 { 4819 int ret, length; 4820 char *buf = server->smallbuf; 4821 struct smb2_hdr *shdr; 4822 unsigned int pdu_length = server->pdu_size; 4823 unsigned int buf_size; 4824 unsigned int next_cmd; 4825 struct mid_q_entry *mid_entry; 4826 int next_is_large; 4827 char *next_buffer = NULL; 4828 4829 *num_mids = 0; 4830 4831 /* switch to large buffer if too big for a small one */ 4832 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4833 server->large_buf = true; 4834 memcpy(server->bigbuf, buf, server->total_read); 4835 buf = server->bigbuf; 4836 } 4837 4838 /* now read the rest */ 4839 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4840 pdu_length - HEADER_SIZE(server) + 1); 4841 if (length < 0) 4842 return length; 4843 server->total_read += length; 4844 4845 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4846 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4847 if (length) 4848 return length; 4849 4850 next_is_large = server->large_buf; 4851 one_more: 4852 shdr = (struct smb2_hdr *)buf; 4853 next_cmd = le32_to_cpu(shdr->NextCommand); 4854 if (next_cmd) { 4855 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4856 return -1; 4857 if (next_is_large) 4858 next_buffer = (char *)cifs_buf_get(); 4859 else 4860 next_buffer = (char *)cifs_small_buf_get(); 4861 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4862 } 4863 4864 mid_entry = smb2_find_mid(server, buf); 4865 if (mid_entry == NULL) 4866 cifs_dbg(FYI, "mid not found\n"); 4867 else { 4868 cifs_dbg(FYI, "mid found\n"); 4869 mid_entry->decrypted = true; 4870 mid_entry->resp_buf_size = server->pdu_size; 4871 } 4872 4873 if (*num_mids >= MAX_COMPOUND) { 4874 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4875 return -1; 4876 } 4877 bufs[*num_mids] = buf; 4878 mids[(*num_mids)++] = mid_entry; 4879 4880 if (mid_entry && mid_entry->handle) 4881 ret = mid_entry->handle(server, mid_entry); 4882 else 4883 ret = cifs_handle_standard(server, mid_entry); 4884 4885 if (ret == 0 && next_cmd) { 4886 pdu_length -= next_cmd; 4887 server->large_buf = next_is_large; 4888 if (next_is_large) 4889 server->bigbuf = buf = next_buffer; 4890 else 4891 server->smallbuf = buf = next_buffer; 4892 goto one_more; 4893 } else if (ret != 0) { 4894 /* 4895 * ret != 0 here means that we didn't get to handle_mid() thus 4896 * server->smallbuf and server->bigbuf are still valid. We need 4897 * to free next_buffer because it is not going to be used 4898 * anywhere. 4899 */ 4900 if (next_is_large) 4901 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4902 else 4903 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4904 } 4905 4906 return ret; 4907 } 4908 4909 static int 4910 smb3_receive_transform(struct TCP_Server_Info *server, 4911 struct mid_q_entry **mids, char **bufs, int *num_mids) 4912 { 4913 char *buf = server->smallbuf; 4914 unsigned int pdu_length = server->pdu_size; 4915 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4916 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4917 4918 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4919 sizeof(struct smb2_hdr)) { 4920 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4921 pdu_length); 4922 cifs_reconnect(server, true); 4923 return -ECONNABORTED; 4924 } 4925 4926 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4927 cifs_server_dbg(VFS, "Transform message is broken\n"); 4928 cifs_reconnect(server, true); 4929 return -ECONNABORTED; 4930 } 4931 4932 /* TODO: add support for compounds containing READ. */ 4933 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4934 return receive_encrypted_read(server, &mids[0], num_mids); 4935 } 4936 4937 return receive_encrypted_standard(server, mids, bufs, num_mids); 4938 } 4939 4940 int 4941 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4942 { 4943 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4944 4945 return handle_read_data(server, mid, buf, server->pdu_size, 4946 NULL, 0, false); 4947 } 4948 4949 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4950 unsigned int *noff) 4951 { 4952 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4953 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 4954 4955 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 4956 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 4957 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 4958 return -EINVAL; 4959 } else { 4960 *noff = le32_to_cpu(hdr->NextCommand); 4961 } 4962 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 4963 return -EINVAL; 4964 return 0; 4965 } 4966 4967 static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 4968 struct dentry *dentry, struct cifs_tcon *tcon, 4969 const char *full_path, umode_t mode, dev_t dev) 4970 { 4971 struct TCP_Server_Info *server = tcon->ses->server; 4972 struct cifs_open_parms oparms; 4973 struct cifs_io_parms io_parms = {}; 4974 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 4975 struct cifs_fid fid; 4976 unsigned int bytes_written; 4977 struct win_dev pdev = {}; 4978 struct kvec iov[2]; 4979 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 4980 int rc; 4981 4982 switch (mode & S_IFMT) { 4983 case S_IFCHR: 4984 strscpy(pdev.type, "IntxCHR"); 4985 pdev.major = cpu_to_le64(MAJOR(dev)); 4986 pdev.minor = cpu_to_le64(MINOR(dev)); 4987 break; 4988 case S_IFBLK: 4989 strscpy(pdev.type, "IntxBLK"); 4990 pdev.major = cpu_to_le64(MAJOR(dev)); 4991 pdev.minor = cpu_to_le64(MINOR(dev)); 4992 break; 4993 case S_IFIFO: 4994 strscpy(pdev.type, "LnxFIFO"); 4995 break; 4996 default: 4997 return -EPERM; 4998 } 4999 5000 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5001 FILE_CREATE, CREATE_NOT_DIR | 5002 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5003 oparms.fid = &fid; 5004 5005 rc = server->ops->open(xid, &oparms, &oplock, NULL); 5006 if (rc) 5007 return rc; 5008 5009 io_parms.pid = current->tgid; 5010 io_parms.tcon = tcon; 5011 io_parms.length = sizeof(pdev); 5012 iov[1].iov_base = &pdev; 5013 iov[1].iov_len = sizeof(pdev); 5014 5015 rc = server->ops->sync_write(xid, &fid, &io_parms, 5016 &bytes_written, iov, 1); 5017 server->ops->close(xid, tcon, &fid); 5018 return rc; 5019 } 5020 5021 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5022 struct dentry *dentry, struct cifs_tcon *tcon, 5023 const char *full_path, umode_t mode, dev_t dev) 5024 { 5025 struct inode *new = NULL; 5026 int rc; 5027 5028 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5029 full_path, mode, dev); 5030 if (rc) 5031 return rc; 5032 5033 if (tcon->posix_extensions) { 5034 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5035 inode->i_sb, xid); 5036 } else if (tcon->unix_ext) { 5037 rc = cifs_get_inode_info_unix(&new, full_path, 5038 inode->i_sb, xid); 5039 } else { 5040 rc = cifs_get_inode_info(&new, full_path, NULL, 5041 inode->i_sb, xid, NULL); 5042 } 5043 if (!rc) 5044 d_instantiate(dentry, new); 5045 return rc; 5046 } 5047 5048 static int smb2_make_node(unsigned int xid, struct inode *inode, 5049 struct dentry *dentry, struct cifs_tcon *tcon, 5050 const char *full_path, umode_t mode, dev_t dev) 5051 { 5052 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5053 int rc; 5054 5055 /* 5056 * Check if mounted with mount parm 'sfu' mount parm. 5057 * SFU emulation should work with all servers, but only 5058 * supports block and char device (no socket & fifo), 5059 * and was used by default in earlier versions of Windows 5060 */ 5061 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5062 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5063 full_path, mode, dev); 5064 } else { 5065 rc = smb2_mknod_reparse(xid, inode, dentry, tcon, 5066 full_path, mode, dev); 5067 } 5068 return rc; 5069 } 5070 5071 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5072 struct smb_version_operations smb20_operations = { 5073 .compare_fids = smb2_compare_fids, 5074 .setup_request = smb2_setup_request, 5075 .setup_async_request = smb2_setup_async_request, 5076 .check_receive = smb2_check_receive, 5077 .add_credits = smb2_add_credits, 5078 .set_credits = smb2_set_credits, 5079 .get_credits_field = smb2_get_credits_field, 5080 .get_credits = smb2_get_credits, 5081 .wait_mtu_credits = cifs_wait_mtu_credits, 5082 .get_next_mid = smb2_get_next_mid, 5083 .revert_current_mid = smb2_revert_current_mid, 5084 .read_data_offset = smb2_read_data_offset, 5085 .read_data_length = smb2_read_data_length, 5086 .map_error = map_smb2_to_linux_error, 5087 .find_mid = smb2_find_mid, 5088 .check_message = smb2_check_message, 5089 .dump_detail = smb2_dump_detail, 5090 .clear_stats = smb2_clear_stats, 5091 .print_stats = smb2_print_stats, 5092 .is_oplock_break = smb2_is_valid_oplock_break, 5093 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5094 .downgrade_oplock = smb2_downgrade_oplock, 5095 .need_neg = smb2_need_neg, 5096 .negotiate = smb2_negotiate, 5097 .negotiate_wsize = smb2_negotiate_wsize, 5098 .negotiate_rsize = smb2_negotiate_rsize, 5099 .sess_setup = SMB2_sess_setup, 5100 .logoff = SMB2_logoff, 5101 .tree_connect = SMB2_tcon, 5102 .tree_disconnect = SMB2_tdis, 5103 .qfs_tcon = smb2_qfs_tcon, 5104 .is_path_accessible = smb2_is_path_accessible, 5105 .can_echo = smb2_can_echo, 5106 .echo = SMB2_echo, 5107 .query_path_info = smb2_query_path_info, 5108 .query_reparse_point = smb2_query_reparse_point, 5109 .get_srv_inum = smb2_get_srv_inum, 5110 .query_file_info = smb2_query_file_info, 5111 .set_path_size = smb2_set_path_size, 5112 .set_file_size = smb2_set_file_size, 5113 .set_file_info = smb2_set_file_info, 5114 .set_compression = smb2_set_compression, 5115 .mkdir = smb2_mkdir, 5116 .mkdir_setinfo = smb2_mkdir_setinfo, 5117 .rmdir = smb2_rmdir, 5118 .unlink = smb2_unlink, 5119 .rename = smb2_rename_path, 5120 .create_hardlink = smb2_create_hardlink, 5121 .parse_reparse_point = smb2_parse_reparse_point, 5122 .query_mf_symlink = smb3_query_mf_symlink, 5123 .create_mf_symlink = smb3_create_mf_symlink, 5124 .create_reparse_symlink = smb2_create_reparse_symlink, 5125 .open = smb2_open_file, 5126 .set_fid = smb2_set_fid, 5127 .close = smb2_close_file, 5128 .flush = smb2_flush_file, 5129 .async_readv = smb2_async_readv, 5130 .async_writev = smb2_async_writev, 5131 .sync_read = smb2_sync_read, 5132 .sync_write = smb2_sync_write, 5133 .query_dir_first = smb2_query_dir_first, 5134 .query_dir_next = smb2_query_dir_next, 5135 .close_dir = smb2_close_dir, 5136 .calc_smb_size = smb2_calc_size, 5137 .is_status_pending = smb2_is_status_pending, 5138 .is_session_expired = smb2_is_session_expired, 5139 .oplock_response = smb2_oplock_response, 5140 .queryfs = smb2_queryfs, 5141 .mand_lock = smb2_mand_lock, 5142 .mand_unlock_range = smb2_unlock_range, 5143 .push_mand_locks = smb2_push_mandatory_locks, 5144 .get_lease_key = smb2_get_lease_key, 5145 .set_lease_key = smb2_set_lease_key, 5146 .new_lease_key = smb2_new_lease_key, 5147 .calc_signature = smb2_calc_signature, 5148 .is_read_op = smb2_is_read_op, 5149 .set_oplock_level = smb2_set_oplock_level, 5150 .create_lease_buf = smb2_create_lease_buf, 5151 .parse_lease_buf = smb2_parse_lease_buf, 5152 .copychunk_range = smb2_copychunk_range, 5153 .wp_retry_size = smb2_wp_retry_size, 5154 .dir_needs_close = smb2_dir_needs_close, 5155 .get_dfs_refer = smb2_get_dfs_refer, 5156 .select_sectype = smb2_select_sectype, 5157 #ifdef CONFIG_CIFS_XATTR 5158 .query_all_EAs = smb2_query_eas, 5159 .set_EA = smb2_set_ea, 5160 #endif /* CIFS_XATTR */ 5161 .get_acl = get_smb2_acl, 5162 .get_acl_by_fid = get_smb2_acl_by_fid, 5163 .set_acl = set_smb2_acl, 5164 .next_header = smb2_next_header, 5165 .ioctl_query_info = smb2_ioctl_query_info, 5166 .make_node = smb2_make_node, 5167 .fiemap = smb3_fiemap, 5168 .llseek = smb3_llseek, 5169 .is_status_io_timeout = smb2_is_status_io_timeout, 5170 .is_network_name_deleted = smb2_is_network_name_deleted, 5171 }; 5172 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5173 5174 struct smb_version_operations smb21_operations = { 5175 .compare_fids = smb2_compare_fids, 5176 .setup_request = smb2_setup_request, 5177 .setup_async_request = smb2_setup_async_request, 5178 .check_receive = smb2_check_receive, 5179 .add_credits = smb2_add_credits, 5180 .set_credits = smb2_set_credits, 5181 .get_credits_field = smb2_get_credits_field, 5182 .get_credits = smb2_get_credits, 5183 .wait_mtu_credits = smb2_wait_mtu_credits, 5184 .adjust_credits = smb2_adjust_credits, 5185 .get_next_mid = smb2_get_next_mid, 5186 .revert_current_mid = smb2_revert_current_mid, 5187 .read_data_offset = smb2_read_data_offset, 5188 .read_data_length = smb2_read_data_length, 5189 .map_error = map_smb2_to_linux_error, 5190 .find_mid = smb2_find_mid, 5191 .check_message = smb2_check_message, 5192 .dump_detail = smb2_dump_detail, 5193 .clear_stats = smb2_clear_stats, 5194 .print_stats = smb2_print_stats, 5195 .is_oplock_break = smb2_is_valid_oplock_break, 5196 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5197 .downgrade_oplock = smb2_downgrade_oplock, 5198 .need_neg = smb2_need_neg, 5199 .negotiate = smb2_negotiate, 5200 .negotiate_wsize = smb2_negotiate_wsize, 5201 .negotiate_rsize = smb2_negotiate_rsize, 5202 .sess_setup = SMB2_sess_setup, 5203 .logoff = SMB2_logoff, 5204 .tree_connect = SMB2_tcon, 5205 .tree_disconnect = SMB2_tdis, 5206 .qfs_tcon = smb2_qfs_tcon, 5207 .is_path_accessible = smb2_is_path_accessible, 5208 .can_echo = smb2_can_echo, 5209 .echo = SMB2_echo, 5210 .query_path_info = smb2_query_path_info, 5211 .query_reparse_point = smb2_query_reparse_point, 5212 .get_srv_inum = smb2_get_srv_inum, 5213 .query_file_info = smb2_query_file_info, 5214 .set_path_size = smb2_set_path_size, 5215 .set_file_size = smb2_set_file_size, 5216 .set_file_info = smb2_set_file_info, 5217 .set_compression = smb2_set_compression, 5218 .mkdir = smb2_mkdir, 5219 .mkdir_setinfo = smb2_mkdir_setinfo, 5220 .rmdir = smb2_rmdir, 5221 .unlink = smb2_unlink, 5222 .rename = smb2_rename_path, 5223 .create_hardlink = smb2_create_hardlink, 5224 .parse_reparse_point = smb2_parse_reparse_point, 5225 .query_mf_symlink = smb3_query_mf_symlink, 5226 .create_mf_symlink = smb3_create_mf_symlink, 5227 .create_reparse_symlink = smb2_create_reparse_symlink, 5228 .open = smb2_open_file, 5229 .set_fid = smb2_set_fid, 5230 .close = smb2_close_file, 5231 .flush = smb2_flush_file, 5232 .async_readv = smb2_async_readv, 5233 .async_writev = smb2_async_writev, 5234 .sync_read = smb2_sync_read, 5235 .sync_write = smb2_sync_write, 5236 .query_dir_first = smb2_query_dir_first, 5237 .query_dir_next = smb2_query_dir_next, 5238 .close_dir = smb2_close_dir, 5239 .calc_smb_size = smb2_calc_size, 5240 .is_status_pending = smb2_is_status_pending, 5241 .is_session_expired = smb2_is_session_expired, 5242 .oplock_response = smb2_oplock_response, 5243 .queryfs = smb2_queryfs, 5244 .mand_lock = smb2_mand_lock, 5245 .mand_unlock_range = smb2_unlock_range, 5246 .push_mand_locks = smb2_push_mandatory_locks, 5247 .get_lease_key = smb2_get_lease_key, 5248 .set_lease_key = smb2_set_lease_key, 5249 .new_lease_key = smb2_new_lease_key, 5250 .calc_signature = smb2_calc_signature, 5251 .is_read_op = smb21_is_read_op, 5252 .set_oplock_level = smb21_set_oplock_level, 5253 .create_lease_buf = smb2_create_lease_buf, 5254 .parse_lease_buf = smb2_parse_lease_buf, 5255 .copychunk_range = smb2_copychunk_range, 5256 .wp_retry_size = smb2_wp_retry_size, 5257 .dir_needs_close = smb2_dir_needs_close, 5258 .enum_snapshots = smb3_enum_snapshots, 5259 .notify = smb3_notify, 5260 .get_dfs_refer = smb2_get_dfs_refer, 5261 .select_sectype = smb2_select_sectype, 5262 #ifdef CONFIG_CIFS_XATTR 5263 .query_all_EAs = smb2_query_eas, 5264 .set_EA = smb2_set_ea, 5265 #endif /* CIFS_XATTR */ 5266 .get_acl = get_smb2_acl, 5267 .get_acl_by_fid = get_smb2_acl_by_fid, 5268 .set_acl = set_smb2_acl, 5269 .next_header = smb2_next_header, 5270 .ioctl_query_info = smb2_ioctl_query_info, 5271 .make_node = smb2_make_node, 5272 .fiemap = smb3_fiemap, 5273 .llseek = smb3_llseek, 5274 .is_status_io_timeout = smb2_is_status_io_timeout, 5275 .is_network_name_deleted = smb2_is_network_name_deleted, 5276 }; 5277 5278 struct smb_version_operations smb30_operations = { 5279 .compare_fids = smb2_compare_fids, 5280 .setup_request = smb2_setup_request, 5281 .setup_async_request = smb2_setup_async_request, 5282 .check_receive = smb2_check_receive, 5283 .add_credits = smb2_add_credits, 5284 .set_credits = smb2_set_credits, 5285 .get_credits_field = smb2_get_credits_field, 5286 .get_credits = smb2_get_credits, 5287 .wait_mtu_credits = smb2_wait_mtu_credits, 5288 .adjust_credits = smb2_adjust_credits, 5289 .get_next_mid = smb2_get_next_mid, 5290 .revert_current_mid = smb2_revert_current_mid, 5291 .read_data_offset = smb2_read_data_offset, 5292 .read_data_length = smb2_read_data_length, 5293 .map_error = map_smb2_to_linux_error, 5294 .find_mid = smb2_find_mid, 5295 .check_message = smb2_check_message, 5296 .dump_detail = smb2_dump_detail, 5297 .clear_stats = smb2_clear_stats, 5298 .print_stats = smb2_print_stats, 5299 .dump_share_caps = smb2_dump_share_caps, 5300 .is_oplock_break = smb2_is_valid_oplock_break, 5301 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5302 .downgrade_oplock = smb3_downgrade_oplock, 5303 .need_neg = smb2_need_neg, 5304 .negotiate = smb2_negotiate, 5305 .negotiate_wsize = smb3_negotiate_wsize, 5306 .negotiate_rsize = smb3_negotiate_rsize, 5307 .sess_setup = SMB2_sess_setup, 5308 .logoff = SMB2_logoff, 5309 .tree_connect = SMB2_tcon, 5310 .tree_disconnect = SMB2_tdis, 5311 .qfs_tcon = smb3_qfs_tcon, 5312 .query_server_interfaces = SMB3_request_interfaces, 5313 .is_path_accessible = smb2_is_path_accessible, 5314 .can_echo = smb2_can_echo, 5315 .echo = SMB2_echo, 5316 .query_path_info = smb2_query_path_info, 5317 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5318 .query_reparse_point = smb2_query_reparse_point, 5319 .get_srv_inum = smb2_get_srv_inum, 5320 .query_file_info = smb2_query_file_info, 5321 .set_path_size = smb2_set_path_size, 5322 .set_file_size = smb2_set_file_size, 5323 .set_file_info = smb2_set_file_info, 5324 .set_compression = smb2_set_compression, 5325 .mkdir = smb2_mkdir, 5326 .mkdir_setinfo = smb2_mkdir_setinfo, 5327 .rmdir = smb2_rmdir, 5328 .unlink = smb2_unlink, 5329 .rename = smb2_rename_path, 5330 .create_hardlink = smb2_create_hardlink, 5331 .parse_reparse_point = smb2_parse_reparse_point, 5332 .query_mf_symlink = smb3_query_mf_symlink, 5333 .create_mf_symlink = smb3_create_mf_symlink, 5334 .create_reparse_symlink = smb2_create_reparse_symlink, 5335 .open = smb2_open_file, 5336 .set_fid = smb2_set_fid, 5337 .close = smb2_close_file, 5338 .close_getattr = smb2_close_getattr, 5339 .flush = smb2_flush_file, 5340 .async_readv = smb2_async_readv, 5341 .async_writev = smb2_async_writev, 5342 .sync_read = smb2_sync_read, 5343 .sync_write = smb2_sync_write, 5344 .query_dir_first = smb2_query_dir_first, 5345 .query_dir_next = smb2_query_dir_next, 5346 .close_dir = smb2_close_dir, 5347 .calc_smb_size = smb2_calc_size, 5348 .is_status_pending = smb2_is_status_pending, 5349 .is_session_expired = smb2_is_session_expired, 5350 .oplock_response = smb2_oplock_response, 5351 .queryfs = smb2_queryfs, 5352 .mand_lock = smb2_mand_lock, 5353 .mand_unlock_range = smb2_unlock_range, 5354 .push_mand_locks = smb2_push_mandatory_locks, 5355 .get_lease_key = smb2_get_lease_key, 5356 .set_lease_key = smb2_set_lease_key, 5357 .new_lease_key = smb2_new_lease_key, 5358 .generate_signingkey = generate_smb30signingkey, 5359 .calc_signature = smb3_calc_signature, 5360 .set_integrity = smb3_set_integrity, 5361 .is_read_op = smb21_is_read_op, 5362 .set_oplock_level = smb3_set_oplock_level, 5363 .create_lease_buf = smb3_create_lease_buf, 5364 .parse_lease_buf = smb3_parse_lease_buf, 5365 .copychunk_range = smb2_copychunk_range, 5366 .duplicate_extents = smb2_duplicate_extents, 5367 .validate_negotiate = smb3_validate_negotiate, 5368 .wp_retry_size = smb2_wp_retry_size, 5369 .dir_needs_close = smb2_dir_needs_close, 5370 .fallocate = smb3_fallocate, 5371 .enum_snapshots = smb3_enum_snapshots, 5372 .notify = smb3_notify, 5373 .init_transform_rq = smb3_init_transform_rq, 5374 .is_transform_hdr = smb3_is_transform_hdr, 5375 .receive_transform = smb3_receive_transform, 5376 .get_dfs_refer = smb2_get_dfs_refer, 5377 .select_sectype = smb2_select_sectype, 5378 #ifdef CONFIG_CIFS_XATTR 5379 .query_all_EAs = smb2_query_eas, 5380 .set_EA = smb2_set_ea, 5381 #endif /* CIFS_XATTR */ 5382 .get_acl = get_smb2_acl, 5383 .get_acl_by_fid = get_smb2_acl_by_fid, 5384 .set_acl = set_smb2_acl, 5385 .next_header = smb2_next_header, 5386 .ioctl_query_info = smb2_ioctl_query_info, 5387 .make_node = smb2_make_node, 5388 .fiemap = smb3_fiemap, 5389 .llseek = smb3_llseek, 5390 .is_status_io_timeout = smb2_is_status_io_timeout, 5391 .is_network_name_deleted = smb2_is_network_name_deleted, 5392 }; 5393 5394 struct smb_version_operations smb311_operations = { 5395 .compare_fids = smb2_compare_fids, 5396 .setup_request = smb2_setup_request, 5397 .setup_async_request = smb2_setup_async_request, 5398 .check_receive = smb2_check_receive, 5399 .add_credits = smb2_add_credits, 5400 .set_credits = smb2_set_credits, 5401 .get_credits_field = smb2_get_credits_field, 5402 .get_credits = smb2_get_credits, 5403 .wait_mtu_credits = smb2_wait_mtu_credits, 5404 .adjust_credits = smb2_adjust_credits, 5405 .get_next_mid = smb2_get_next_mid, 5406 .revert_current_mid = smb2_revert_current_mid, 5407 .read_data_offset = smb2_read_data_offset, 5408 .read_data_length = smb2_read_data_length, 5409 .map_error = map_smb2_to_linux_error, 5410 .find_mid = smb2_find_mid, 5411 .check_message = smb2_check_message, 5412 .dump_detail = smb2_dump_detail, 5413 .clear_stats = smb2_clear_stats, 5414 .print_stats = smb2_print_stats, 5415 .dump_share_caps = smb2_dump_share_caps, 5416 .is_oplock_break = smb2_is_valid_oplock_break, 5417 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5418 .downgrade_oplock = smb3_downgrade_oplock, 5419 .need_neg = smb2_need_neg, 5420 .negotiate = smb2_negotiate, 5421 .negotiate_wsize = smb3_negotiate_wsize, 5422 .negotiate_rsize = smb3_negotiate_rsize, 5423 .sess_setup = SMB2_sess_setup, 5424 .logoff = SMB2_logoff, 5425 .tree_connect = SMB2_tcon, 5426 .tree_disconnect = SMB2_tdis, 5427 .qfs_tcon = smb3_qfs_tcon, 5428 .query_server_interfaces = SMB3_request_interfaces, 5429 .is_path_accessible = smb2_is_path_accessible, 5430 .can_echo = smb2_can_echo, 5431 .echo = SMB2_echo, 5432 .query_path_info = smb2_query_path_info, 5433 .query_reparse_point = smb2_query_reparse_point, 5434 .get_srv_inum = smb2_get_srv_inum, 5435 .query_file_info = smb2_query_file_info, 5436 .set_path_size = smb2_set_path_size, 5437 .set_file_size = smb2_set_file_size, 5438 .set_file_info = smb2_set_file_info, 5439 .set_compression = smb2_set_compression, 5440 .mkdir = smb2_mkdir, 5441 .mkdir_setinfo = smb2_mkdir_setinfo, 5442 .posix_mkdir = smb311_posix_mkdir, 5443 .rmdir = smb2_rmdir, 5444 .unlink = smb2_unlink, 5445 .rename = smb2_rename_path, 5446 .create_hardlink = smb2_create_hardlink, 5447 .parse_reparse_point = smb2_parse_reparse_point, 5448 .query_mf_symlink = smb3_query_mf_symlink, 5449 .create_mf_symlink = smb3_create_mf_symlink, 5450 .create_reparse_symlink = smb2_create_reparse_symlink, 5451 .open = smb2_open_file, 5452 .set_fid = smb2_set_fid, 5453 .close = smb2_close_file, 5454 .close_getattr = smb2_close_getattr, 5455 .flush = smb2_flush_file, 5456 .async_readv = smb2_async_readv, 5457 .async_writev = smb2_async_writev, 5458 .sync_read = smb2_sync_read, 5459 .sync_write = smb2_sync_write, 5460 .query_dir_first = smb2_query_dir_first, 5461 .query_dir_next = smb2_query_dir_next, 5462 .close_dir = smb2_close_dir, 5463 .calc_smb_size = smb2_calc_size, 5464 .is_status_pending = smb2_is_status_pending, 5465 .is_session_expired = smb2_is_session_expired, 5466 .oplock_response = smb2_oplock_response, 5467 .queryfs = smb311_queryfs, 5468 .mand_lock = smb2_mand_lock, 5469 .mand_unlock_range = smb2_unlock_range, 5470 .push_mand_locks = smb2_push_mandatory_locks, 5471 .get_lease_key = smb2_get_lease_key, 5472 .set_lease_key = smb2_set_lease_key, 5473 .new_lease_key = smb2_new_lease_key, 5474 .generate_signingkey = generate_smb311signingkey, 5475 .calc_signature = smb3_calc_signature, 5476 .set_integrity = smb3_set_integrity, 5477 .is_read_op = smb21_is_read_op, 5478 .set_oplock_level = smb3_set_oplock_level, 5479 .create_lease_buf = smb3_create_lease_buf, 5480 .parse_lease_buf = smb3_parse_lease_buf, 5481 .copychunk_range = smb2_copychunk_range, 5482 .duplicate_extents = smb2_duplicate_extents, 5483 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5484 .wp_retry_size = smb2_wp_retry_size, 5485 .dir_needs_close = smb2_dir_needs_close, 5486 .fallocate = smb3_fallocate, 5487 .enum_snapshots = smb3_enum_snapshots, 5488 .notify = smb3_notify, 5489 .init_transform_rq = smb3_init_transform_rq, 5490 .is_transform_hdr = smb3_is_transform_hdr, 5491 .receive_transform = smb3_receive_transform, 5492 .get_dfs_refer = smb2_get_dfs_refer, 5493 .select_sectype = smb2_select_sectype, 5494 #ifdef CONFIG_CIFS_XATTR 5495 .query_all_EAs = smb2_query_eas, 5496 .set_EA = smb2_set_ea, 5497 #endif /* CIFS_XATTR */ 5498 .get_acl = get_smb2_acl, 5499 .get_acl_by_fid = get_smb2_acl_by_fid, 5500 .set_acl = set_smb2_acl, 5501 .next_header = smb2_next_header, 5502 .ioctl_query_info = smb2_ioctl_query_info, 5503 .make_node = smb2_make_node, 5504 .fiemap = smb3_fiemap, 5505 .llseek = smb3_llseek, 5506 .is_status_io_timeout = smb2_is_status_io_timeout, 5507 .is_network_name_deleted = smb2_is_network_name_deleted, 5508 }; 5509 5510 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5511 struct smb_version_values smb20_values = { 5512 .version_string = SMB20_VERSION_STRING, 5513 .protocol_id = SMB20_PROT_ID, 5514 .req_capabilities = 0, /* MBZ */ 5515 .large_lock_type = 0, 5516 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5517 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5518 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5519 .header_size = sizeof(struct smb2_hdr), 5520 .header_preamble_size = 0, 5521 .max_header_size = MAX_SMB2_HDR_SIZE, 5522 .read_rsp_size = sizeof(struct smb2_read_rsp), 5523 .lock_cmd = SMB2_LOCK, 5524 .cap_unix = 0, 5525 .cap_nt_find = SMB2_NT_FIND, 5526 .cap_large_files = SMB2_LARGE_FILES, 5527 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5528 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5529 .create_lease_size = sizeof(struct create_lease), 5530 }; 5531 #endif /* ALLOW_INSECURE_LEGACY */ 5532 5533 struct smb_version_values smb21_values = { 5534 .version_string = SMB21_VERSION_STRING, 5535 .protocol_id = SMB21_PROT_ID, 5536 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5537 .large_lock_type = 0, 5538 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5539 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5540 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5541 .header_size = sizeof(struct smb2_hdr), 5542 .header_preamble_size = 0, 5543 .max_header_size = MAX_SMB2_HDR_SIZE, 5544 .read_rsp_size = sizeof(struct smb2_read_rsp), 5545 .lock_cmd = SMB2_LOCK, 5546 .cap_unix = 0, 5547 .cap_nt_find = SMB2_NT_FIND, 5548 .cap_large_files = SMB2_LARGE_FILES, 5549 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5550 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5551 .create_lease_size = sizeof(struct create_lease), 5552 }; 5553 5554 struct smb_version_values smb3any_values = { 5555 .version_string = SMB3ANY_VERSION_STRING, 5556 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5557 .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, 5558 .large_lock_type = 0, 5559 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5560 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5561 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5562 .header_size = sizeof(struct smb2_hdr), 5563 .header_preamble_size = 0, 5564 .max_header_size = MAX_SMB2_HDR_SIZE, 5565 .read_rsp_size = sizeof(struct smb2_read_rsp), 5566 .lock_cmd = SMB2_LOCK, 5567 .cap_unix = 0, 5568 .cap_nt_find = SMB2_NT_FIND, 5569 .cap_large_files = SMB2_LARGE_FILES, 5570 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5571 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5572 .create_lease_size = sizeof(struct create_lease_v2), 5573 }; 5574 5575 struct smb_version_values smbdefault_values = { 5576 .version_string = SMBDEFAULT_VERSION_STRING, 5577 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5578 .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, 5579 .large_lock_type = 0, 5580 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5581 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5582 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5583 .header_size = sizeof(struct smb2_hdr), 5584 .header_preamble_size = 0, 5585 .max_header_size = MAX_SMB2_HDR_SIZE, 5586 .read_rsp_size = sizeof(struct smb2_read_rsp), 5587 .lock_cmd = SMB2_LOCK, 5588 .cap_unix = 0, 5589 .cap_nt_find = SMB2_NT_FIND, 5590 .cap_large_files = SMB2_LARGE_FILES, 5591 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5592 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5593 .create_lease_size = sizeof(struct create_lease_v2), 5594 }; 5595 5596 struct smb_version_values smb30_values = { 5597 .version_string = SMB30_VERSION_STRING, 5598 .protocol_id = SMB30_PROT_ID, 5599 .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, 5600 .large_lock_type = 0, 5601 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5602 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5603 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5604 .header_size = sizeof(struct smb2_hdr), 5605 .header_preamble_size = 0, 5606 .max_header_size = MAX_SMB2_HDR_SIZE, 5607 .read_rsp_size = sizeof(struct smb2_read_rsp), 5608 .lock_cmd = SMB2_LOCK, 5609 .cap_unix = 0, 5610 .cap_nt_find = SMB2_NT_FIND, 5611 .cap_large_files = SMB2_LARGE_FILES, 5612 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5613 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5614 .create_lease_size = sizeof(struct create_lease_v2), 5615 }; 5616 5617 struct smb_version_values smb302_values = { 5618 .version_string = SMB302_VERSION_STRING, 5619 .protocol_id = SMB302_PROT_ID, 5620 .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, 5621 .large_lock_type = 0, 5622 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5623 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5624 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5625 .header_size = sizeof(struct smb2_hdr), 5626 .header_preamble_size = 0, 5627 .max_header_size = MAX_SMB2_HDR_SIZE, 5628 .read_rsp_size = sizeof(struct smb2_read_rsp), 5629 .lock_cmd = SMB2_LOCK, 5630 .cap_unix = 0, 5631 .cap_nt_find = SMB2_NT_FIND, 5632 .cap_large_files = SMB2_LARGE_FILES, 5633 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5634 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5635 .create_lease_size = sizeof(struct create_lease_v2), 5636 }; 5637 5638 struct smb_version_values smb311_values = { 5639 .version_string = SMB311_VERSION_STRING, 5640 .protocol_id = SMB311_PROT_ID, 5641 .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, 5642 .large_lock_type = 0, 5643 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5644 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5645 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5646 .header_size = sizeof(struct smb2_hdr), 5647 .header_preamble_size = 0, 5648 .max_header_size = MAX_SMB2_HDR_SIZE, 5649 .read_rsp_size = sizeof(struct smb2_read_rsp), 5650 .lock_cmd = SMB2_LOCK, 5651 .cap_unix = 0, 5652 .cap_nt_find = SMB2_NT_FIND, 5653 .cap_large_files = SMB2_LARGE_FILES, 5654 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5655 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5656 .create_lease_size = sizeof(struct create_lease_v2), 5657 }; 5658