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 void 1416 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1417 struct cifs_fid *fid) 1418 { 1419 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1420 } 1421 1422 static void 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; 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 } 1463 1464 static int 1465 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1466 u64 persistent_fid, u64 volatile_fid, 1467 struct copychunk_ioctl *pcchunk) 1468 { 1469 int rc; 1470 unsigned int ret_data_len; 1471 struct resume_key_req *res_key; 1472 1473 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1474 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1475 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1476 1477 if (rc == -EOPNOTSUPP) { 1478 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1479 goto req_res_key_exit; 1480 } else if (rc) { 1481 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1482 goto req_res_key_exit; 1483 } 1484 if (ret_data_len < sizeof(struct resume_key_req)) { 1485 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1486 rc = -EINVAL; 1487 goto req_res_key_exit; 1488 } 1489 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1490 1491 req_res_key_exit: 1492 kfree(res_key); 1493 return rc; 1494 } 1495 1496 static int 1497 smb2_ioctl_query_info(const unsigned int xid, 1498 struct cifs_tcon *tcon, 1499 struct cifs_sb_info *cifs_sb, 1500 __le16 *path, int is_dir, 1501 unsigned long p) 1502 { 1503 struct smb2_compound_vars *vars; 1504 struct smb_rqst *rqst; 1505 struct kvec *rsp_iov; 1506 struct cifs_ses *ses = tcon->ses; 1507 struct TCP_Server_Info *server; 1508 char __user *arg = (char __user *)p; 1509 struct smb_query_info qi; 1510 struct smb_query_info __user *pqi; 1511 int rc = 0; 1512 int flags = CIFS_CP_CREATE_CLOSE_OP; 1513 struct smb2_query_info_rsp *qi_rsp = NULL; 1514 struct smb2_ioctl_rsp *io_rsp = NULL; 1515 void *buffer = NULL; 1516 int resp_buftype[3]; 1517 struct cifs_open_parms oparms; 1518 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1519 struct cifs_fid fid; 1520 unsigned int size[2]; 1521 void *data[2]; 1522 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1523 void (*free_req1_func)(struct smb_rqst *r); 1524 int retries = 0, cur_sleep = 1; 1525 1526 replay_again: 1527 /* reinitialize for possible replay */ 1528 flags = CIFS_CP_CREATE_CLOSE_OP; 1529 oplock = SMB2_OPLOCK_LEVEL_NONE; 1530 server = cifs_pick_channel(ses); 1531 1532 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1533 if (vars == NULL) 1534 return -ENOMEM; 1535 rqst = &vars->rqst[0]; 1536 rsp_iov = &vars->rsp_iov[0]; 1537 1538 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1539 1540 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1541 rc = -EFAULT; 1542 goto free_vars; 1543 } 1544 if (qi.output_buffer_length > 1024) { 1545 rc = -EINVAL; 1546 goto free_vars; 1547 } 1548 1549 if (!ses || !server) { 1550 rc = -EIO; 1551 goto free_vars; 1552 } 1553 1554 if (smb3_encryption_required(tcon)) 1555 flags |= CIFS_TRANSFORM_REQ; 1556 1557 if (qi.output_buffer_length) { 1558 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1559 if (IS_ERR(buffer)) { 1560 rc = PTR_ERR(buffer); 1561 goto free_vars; 1562 } 1563 } 1564 1565 /* Open */ 1566 rqst[0].rq_iov = &vars->open_iov[0]; 1567 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1568 1569 oparms = (struct cifs_open_parms) { 1570 .tcon = tcon, 1571 .disposition = FILE_OPEN, 1572 .create_options = cifs_create_options(cifs_sb, create_options), 1573 .fid = &fid, 1574 .replay = !!(retries), 1575 }; 1576 1577 if (qi.flags & PASSTHRU_FSCTL) { 1578 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1579 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1580 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1581 break; 1582 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1583 oparms.desired_access = GENERIC_ALL; 1584 break; 1585 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1586 oparms.desired_access = GENERIC_READ; 1587 break; 1588 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1589 oparms.desired_access = GENERIC_WRITE; 1590 break; 1591 } 1592 } else if (qi.flags & PASSTHRU_SET_INFO) { 1593 oparms.desired_access = GENERIC_WRITE; 1594 } else { 1595 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1596 } 1597 1598 rc = SMB2_open_init(tcon, server, 1599 &rqst[0], &oplock, &oparms, path); 1600 if (rc) 1601 goto free_output_buffer; 1602 smb2_set_next_command(tcon, &rqst[0]); 1603 1604 /* Query */ 1605 if (qi.flags & PASSTHRU_FSCTL) { 1606 /* Can eventually relax perm check since server enforces too */ 1607 if (!capable(CAP_SYS_ADMIN)) { 1608 rc = -EPERM; 1609 goto free_open_req; 1610 } 1611 rqst[1].rq_iov = &vars->io_iov[0]; 1612 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1613 1614 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1615 qi.info_type, buffer, qi.output_buffer_length, 1616 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1617 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1618 free_req1_func = SMB2_ioctl_free; 1619 } else if (qi.flags == PASSTHRU_SET_INFO) { 1620 /* Can eventually relax perm check since server enforces too */ 1621 if (!capable(CAP_SYS_ADMIN)) { 1622 rc = -EPERM; 1623 goto free_open_req; 1624 } 1625 if (qi.output_buffer_length < 8) { 1626 rc = -EINVAL; 1627 goto free_open_req; 1628 } 1629 rqst[1].rq_iov = vars->si_iov; 1630 rqst[1].rq_nvec = 1; 1631 1632 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1633 size[0] = 8; 1634 data[0] = buffer; 1635 1636 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1637 current->tgid, FILE_END_OF_FILE_INFORMATION, 1638 SMB2_O_INFO_FILE, 0, data, size); 1639 free_req1_func = SMB2_set_info_free; 1640 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1641 rqst[1].rq_iov = &vars->qi_iov; 1642 rqst[1].rq_nvec = 1; 1643 1644 rc = SMB2_query_info_init(tcon, server, 1645 &rqst[1], COMPOUND_FID, 1646 COMPOUND_FID, qi.file_info_class, 1647 qi.info_type, qi.additional_information, 1648 qi.input_buffer_length, 1649 qi.output_buffer_length, buffer); 1650 free_req1_func = SMB2_query_info_free; 1651 } else { /* unknown flags */ 1652 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1653 qi.flags); 1654 rc = -EINVAL; 1655 } 1656 1657 if (rc) 1658 goto free_open_req; 1659 smb2_set_next_command(tcon, &rqst[1]); 1660 smb2_set_related(&rqst[1]); 1661 1662 /* Close */ 1663 rqst[2].rq_iov = &vars->close_iov; 1664 rqst[2].rq_nvec = 1; 1665 1666 rc = SMB2_close_init(tcon, server, 1667 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1668 if (rc) 1669 goto free_req_1; 1670 smb2_set_related(&rqst[2]); 1671 1672 if (retries) { 1673 smb2_set_replay(server, &rqst[0]); 1674 smb2_set_replay(server, &rqst[1]); 1675 smb2_set_replay(server, &rqst[2]); 1676 } 1677 1678 rc = compound_send_recv(xid, ses, server, 1679 flags, 3, rqst, 1680 resp_buftype, rsp_iov); 1681 if (rc) 1682 goto out; 1683 1684 /* No need to bump num_remote_opens since handle immediately closed */ 1685 if (qi.flags & PASSTHRU_FSCTL) { 1686 pqi = (struct smb_query_info __user *)arg; 1687 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1688 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1689 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1690 if (qi.input_buffer_length > 0 && 1691 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1692 > rsp_iov[1].iov_len) { 1693 rc = -EFAULT; 1694 goto out; 1695 } 1696 1697 if (copy_to_user(&pqi->input_buffer_length, 1698 &qi.input_buffer_length, 1699 sizeof(qi.input_buffer_length))) { 1700 rc = -EFAULT; 1701 goto out; 1702 } 1703 1704 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1705 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1706 qi.input_buffer_length)) 1707 rc = -EFAULT; 1708 } else { 1709 pqi = (struct smb_query_info __user *)arg; 1710 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1711 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1712 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1713 if (copy_to_user(&pqi->input_buffer_length, 1714 &qi.input_buffer_length, 1715 sizeof(qi.input_buffer_length))) { 1716 rc = -EFAULT; 1717 goto out; 1718 } 1719 1720 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1721 qi.input_buffer_length)) 1722 rc = -EFAULT; 1723 } 1724 1725 out: 1726 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1727 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1728 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1729 SMB2_close_free(&rqst[2]); 1730 free_req_1: 1731 free_req1_func(&rqst[1]); 1732 free_open_req: 1733 SMB2_open_free(&rqst[0]); 1734 free_output_buffer: 1735 kfree(buffer); 1736 free_vars: 1737 kfree(vars); 1738 1739 if (is_replayable_error(rc) && 1740 smb2_should_replay(tcon, &retries, &cur_sleep)) 1741 goto replay_again; 1742 1743 return rc; 1744 } 1745 1746 static ssize_t 1747 smb2_copychunk_range(const unsigned int xid, 1748 struct cifsFileInfo *srcfile, 1749 struct cifsFileInfo *trgtfile, u64 src_off, 1750 u64 len, u64 dest_off) 1751 { 1752 int rc; 1753 unsigned int ret_data_len; 1754 struct copychunk_ioctl *pcchunk; 1755 struct copychunk_ioctl_rsp *retbuf = NULL; 1756 struct cifs_tcon *tcon; 1757 int chunks_copied = 0; 1758 bool chunk_sizes_updated = false; 1759 ssize_t bytes_written, total_bytes_written = 0; 1760 1761 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1762 if (pcchunk == NULL) 1763 return -ENOMEM; 1764 1765 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1766 /* Request a key from the server to identify the source of the copy */ 1767 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1768 srcfile->fid.persistent_fid, 1769 srcfile->fid.volatile_fid, pcchunk); 1770 1771 /* Note: request_res_key sets res_key null only if rc !=0 */ 1772 if (rc) 1773 goto cchunk_out; 1774 1775 /* For now array only one chunk long, will make more flexible later */ 1776 pcchunk->ChunkCount = cpu_to_le32(1); 1777 pcchunk->Reserved = 0; 1778 pcchunk->Reserved2 = 0; 1779 1780 tcon = tlink_tcon(trgtfile->tlink); 1781 1782 while (len > 0) { 1783 pcchunk->SourceOffset = cpu_to_le64(src_off); 1784 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1785 pcchunk->Length = 1786 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1787 1788 /* Request server copy to target from src identified by key */ 1789 kfree(retbuf); 1790 retbuf = NULL; 1791 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1792 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1793 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1794 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1795 if (rc == 0) { 1796 if (ret_data_len != 1797 sizeof(struct copychunk_ioctl_rsp)) { 1798 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1799 rc = -EIO; 1800 goto cchunk_out; 1801 } 1802 if (retbuf->TotalBytesWritten == 0) { 1803 cifs_dbg(FYI, "no bytes copied\n"); 1804 rc = -EIO; 1805 goto cchunk_out; 1806 } 1807 /* 1808 * Check if server claimed to write more than we asked 1809 */ 1810 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1811 le32_to_cpu(pcchunk->Length)) { 1812 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1813 rc = -EIO; 1814 goto cchunk_out; 1815 } 1816 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1817 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1818 rc = -EIO; 1819 goto cchunk_out; 1820 } 1821 chunks_copied++; 1822 1823 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1824 src_off += bytes_written; 1825 dest_off += bytes_written; 1826 len -= bytes_written; 1827 total_bytes_written += bytes_written; 1828 1829 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1830 le32_to_cpu(retbuf->ChunksWritten), 1831 le32_to_cpu(retbuf->ChunkBytesWritten), 1832 bytes_written); 1833 } else if (rc == -EINVAL) { 1834 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1835 goto cchunk_out; 1836 1837 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1838 le32_to_cpu(retbuf->ChunksWritten), 1839 le32_to_cpu(retbuf->ChunkBytesWritten), 1840 le32_to_cpu(retbuf->TotalBytesWritten)); 1841 1842 /* 1843 * Check if this is the first request using these sizes, 1844 * (ie check if copy succeed once with original sizes 1845 * and check if the server gave us different sizes after 1846 * we already updated max sizes on previous request). 1847 * if not then why is the server returning an error now 1848 */ 1849 if ((chunks_copied != 0) || chunk_sizes_updated) 1850 goto cchunk_out; 1851 1852 /* Check that server is not asking us to grow size */ 1853 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1854 tcon->max_bytes_chunk) 1855 tcon->max_bytes_chunk = 1856 le32_to_cpu(retbuf->ChunkBytesWritten); 1857 else 1858 goto cchunk_out; /* server gave us bogus size */ 1859 1860 /* No need to change MaxChunks since already set to 1 */ 1861 chunk_sizes_updated = true; 1862 } else 1863 goto cchunk_out; 1864 } 1865 1866 cchunk_out: 1867 kfree(pcchunk); 1868 kfree(retbuf); 1869 if (rc) 1870 return rc; 1871 else 1872 return total_bytes_written; 1873 } 1874 1875 static int 1876 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1877 struct cifs_fid *fid) 1878 { 1879 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1880 } 1881 1882 static unsigned int 1883 smb2_read_data_offset(char *buf) 1884 { 1885 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1886 1887 return rsp->DataOffset; 1888 } 1889 1890 static unsigned int 1891 smb2_read_data_length(char *buf, bool in_remaining) 1892 { 1893 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1894 1895 if (in_remaining) 1896 return le32_to_cpu(rsp->DataRemaining); 1897 1898 return le32_to_cpu(rsp->DataLength); 1899 } 1900 1901 1902 static int 1903 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1904 struct cifs_io_parms *parms, unsigned int *bytes_read, 1905 char **buf, int *buf_type) 1906 { 1907 parms->persistent_fid = pfid->persistent_fid; 1908 parms->volatile_fid = pfid->volatile_fid; 1909 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1910 } 1911 1912 static int 1913 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1914 struct cifs_io_parms *parms, unsigned int *written, 1915 struct kvec *iov, unsigned long nr_segs) 1916 { 1917 1918 parms->persistent_fid = pfid->persistent_fid; 1919 parms->volatile_fid = pfid->volatile_fid; 1920 return SMB2_write(xid, parms, written, iov, nr_segs); 1921 } 1922 1923 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1924 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1925 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1926 { 1927 struct cifsInodeInfo *cifsi; 1928 int rc; 1929 1930 cifsi = CIFS_I(inode); 1931 1932 /* if file already sparse don't bother setting sparse again */ 1933 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1934 return true; /* already sparse */ 1935 1936 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1937 return true; /* already not sparse */ 1938 1939 /* 1940 * Can't check for sparse support on share the usual way via the 1941 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1942 * since Samba server doesn't set the flag on the share, yet 1943 * supports the set sparse FSCTL and returns sparse correctly 1944 * in the file attributes. If we fail setting sparse though we 1945 * mark that server does not support sparse files for this share 1946 * to avoid repeatedly sending the unsupported fsctl to server 1947 * if the file is repeatedly extended. 1948 */ 1949 if (tcon->broken_sparse_sup) 1950 return false; 1951 1952 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1953 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1954 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1955 if (rc) { 1956 tcon->broken_sparse_sup = true; 1957 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1958 return false; 1959 } 1960 1961 if (setsparse) 1962 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1963 else 1964 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1965 1966 return true; 1967 } 1968 1969 static int 1970 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1971 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1972 { 1973 struct inode *inode; 1974 1975 /* 1976 * If extending file more than one page make sparse. Many Linux fs 1977 * make files sparse by default when extending via ftruncate 1978 */ 1979 inode = d_inode(cfile->dentry); 1980 1981 if (!set_alloc && (size > inode->i_size + 8192)) { 1982 __u8 set_sparse = 1; 1983 1984 /* whether set sparse succeeds or not, extend the file */ 1985 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1986 } 1987 1988 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1989 cfile->fid.volatile_fid, cfile->pid, size); 1990 } 1991 1992 static int 1993 smb2_duplicate_extents(const unsigned int xid, 1994 struct cifsFileInfo *srcfile, 1995 struct cifsFileInfo *trgtfile, u64 src_off, 1996 u64 len, u64 dest_off) 1997 { 1998 int rc; 1999 unsigned int ret_data_len; 2000 struct inode *inode; 2001 struct duplicate_extents_to_file dup_ext_buf; 2002 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2003 2004 /* server fileays advertise duplicate extent support with this flag */ 2005 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2006 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2007 return -EOPNOTSUPP; 2008 2009 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2010 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2011 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2012 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2013 dup_ext_buf.ByteCount = cpu_to_le64(len); 2014 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2015 src_off, dest_off, len); 2016 2017 inode = d_inode(trgtfile->dentry); 2018 if (inode->i_size < dest_off + len) { 2019 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2020 if (rc) 2021 goto duplicate_extents_out; 2022 2023 /* 2024 * Although also could set plausible allocation size (i_blocks) 2025 * here in addition to setting the file size, in reflink 2026 * it is likely that the target file is sparse. Its allocation 2027 * size will be queried on next revalidate, but it is important 2028 * to make sure that file's cached size is updated immediately 2029 */ 2030 cifs_setsize(inode, dest_off + len); 2031 } 2032 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2033 trgtfile->fid.volatile_fid, 2034 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2035 (char *)&dup_ext_buf, 2036 sizeof(struct duplicate_extents_to_file), 2037 CIFSMaxBufSize, NULL, 2038 &ret_data_len); 2039 2040 if (ret_data_len > 0) 2041 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2042 2043 duplicate_extents_out: 2044 return rc; 2045 } 2046 2047 static int 2048 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2049 struct cifsFileInfo *cfile) 2050 { 2051 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2052 cfile->fid.volatile_fid); 2053 } 2054 2055 static int 2056 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2057 struct cifsFileInfo *cfile) 2058 { 2059 struct fsctl_set_integrity_information_req integr_info; 2060 unsigned int ret_data_len; 2061 2062 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2063 integr_info.Flags = 0; 2064 integr_info.Reserved = 0; 2065 2066 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2067 cfile->fid.volatile_fid, 2068 FSCTL_SET_INTEGRITY_INFORMATION, 2069 (char *)&integr_info, 2070 sizeof(struct fsctl_set_integrity_information_req), 2071 CIFSMaxBufSize, NULL, 2072 &ret_data_len); 2073 2074 } 2075 2076 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2077 #define GMT_TOKEN_SIZE 50 2078 2079 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2080 2081 /* 2082 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2083 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2084 */ 2085 static int 2086 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2087 struct cifsFileInfo *cfile, void __user *ioc_buf) 2088 { 2089 char *retbuf = NULL; 2090 unsigned int ret_data_len = 0; 2091 int rc; 2092 u32 max_response_size; 2093 struct smb_snapshot_array snapshot_in; 2094 2095 /* 2096 * On the first query to enumerate the list of snapshots available 2097 * for this volume the buffer begins with 0 (number of snapshots 2098 * which can be returned is zero since at that point we do not know 2099 * how big the buffer needs to be). On the second query, 2100 * it (ret_data_len) is set to number of snapshots so we can 2101 * know to set the maximum response size larger (see below). 2102 */ 2103 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2104 return -EFAULT; 2105 2106 /* 2107 * Note that for snapshot queries that servers like Azure expect that 2108 * the first query be minimal size (and just used to get the number/size 2109 * of previous versions) so response size must be specified as EXACTLY 2110 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2111 * of eight bytes. 2112 */ 2113 if (ret_data_len == 0) 2114 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2115 else 2116 max_response_size = CIFSMaxBufSize; 2117 2118 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2119 cfile->fid.volatile_fid, 2120 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2121 NULL, 0 /* no input data */, max_response_size, 2122 (char **)&retbuf, 2123 &ret_data_len); 2124 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2125 rc, ret_data_len); 2126 if (rc) 2127 return rc; 2128 2129 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2130 /* Fixup buffer */ 2131 if (copy_from_user(&snapshot_in, ioc_buf, 2132 sizeof(struct smb_snapshot_array))) { 2133 rc = -EFAULT; 2134 kfree(retbuf); 2135 return rc; 2136 } 2137 2138 /* 2139 * Check for min size, ie not large enough to fit even one GMT 2140 * token (snapshot). On the first ioctl some users may pass in 2141 * smaller size (or zero) to simply get the size of the array 2142 * so the user space caller can allocate sufficient memory 2143 * and retry the ioctl again with larger array size sufficient 2144 * to hold all of the snapshot GMT tokens on the second try. 2145 */ 2146 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2147 ret_data_len = sizeof(struct smb_snapshot_array); 2148 2149 /* 2150 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2151 * the snapshot array (of 50 byte GMT tokens) each 2152 * representing an available previous version of the data 2153 */ 2154 if (ret_data_len > (snapshot_in.snapshot_array_size + 2155 sizeof(struct smb_snapshot_array))) 2156 ret_data_len = snapshot_in.snapshot_array_size + 2157 sizeof(struct smb_snapshot_array); 2158 2159 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2160 rc = -EFAULT; 2161 } 2162 2163 kfree(retbuf); 2164 return rc; 2165 } 2166 2167 2168 2169 static int 2170 smb3_notify(const unsigned int xid, struct file *pfile, 2171 void __user *ioc_buf, bool return_changes) 2172 { 2173 struct smb3_notify_info notify; 2174 struct smb3_notify_info __user *pnotify_buf; 2175 struct dentry *dentry = pfile->f_path.dentry; 2176 struct inode *inode = file_inode(pfile); 2177 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2178 struct cifs_open_parms oparms; 2179 struct cifs_fid fid; 2180 struct cifs_tcon *tcon; 2181 const unsigned char *path; 2182 char *returned_ioctl_info = NULL; 2183 void *page = alloc_dentry_path(); 2184 __le16 *utf16_path = NULL; 2185 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2186 int rc = 0; 2187 __u32 ret_len = 0; 2188 2189 path = build_path_from_dentry(dentry, page); 2190 if (IS_ERR(path)) { 2191 rc = PTR_ERR(path); 2192 goto notify_exit; 2193 } 2194 2195 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2196 if (utf16_path == NULL) { 2197 rc = -ENOMEM; 2198 goto notify_exit; 2199 } 2200 2201 if (return_changes) { 2202 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2203 rc = -EFAULT; 2204 goto notify_exit; 2205 } 2206 } else { 2207 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2208 rc = -EFAULT; 2209 goto notify_exit; 2210 } 2211 notify.data_len = 0; 2212 } 2213 2214 tcon = cifs_sb_master_tcon(cifs_sb); 2215 oparms = (struct cifs_open_parms) { 2216 .tcon = tcon, 2217 .path = path, 2218 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2219 .disposition = FILE_OPEN, 2220 .create_options = cifs_create_options(cifs_sb, 0), 2221 .fid = &fid, 2222 }; 2223 2224 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2225 NULL); 2226 if (rc) 2227 goto notify_exit; 2228 2229 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2230 notify.watch_tree, notify.completion_filter, 2231 notify.data_len, &returned_ioctl_info, &ret_len); 2232 2233 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2234 2235 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2236 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2237 if (ret_len > notify.data_len) 2238 ret_len = notify.data_len; 2239 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2240 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2241 rc = -EFAULT; 2242 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2243 rc = -EFAULT; 2244 } 2245 kfree(returned_ioctl_info); 2246 notify_exit: 2247 free_dentry_path(page); 2248 kfree(utf16_path); 2249 return rc; 2250 } 2251 2252 static int 2253 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2254 const char *path, struct cifs_sb_info *cifs_sb, 2255 struct cifs_fid *fid, __u16 search_flags, 2256 struct cifs_search_info *srch_inf) 2257 { 2258 __le16 *utf16_path; 2259 struct smb_rqst rqst[2]; 2260 struct kvec rsp_iov[2]; 2261 int resp_buftype[2]; 2262 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2263 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2264 int rc, flags = 0; 2265 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2266 struct cifs_open_parms oparms; 2267 struct smb2_query_directory_rsp *qd_rsp = NULL; 2268 struct smb2_create_rsp *op_rsp = NULL; 2269 struct TCP_Server_Info *server; 2270 int retries = 0, cur_sleep = 1; 2271 2272 replay_again: 2273 /* reinitialize for possible replay */ 2274 flags = 0; 2275 oplock = SMB2_OPLOCK_LEVEL_NONE; 2276 server = cifs_pick_channel(tcon->ses); 2277 2278 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2279 if (!utf16_path) 2280 return -ENOMEM; 2281 2282 if (smb3_encryption_required(tcon)) 2283 flags |= CIFS_TRANSFORM_REQ; 2284 2285 memset(rqst, 0, sizeof(rqst)); 2286 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2287 memset(rsp_iov, 0, sizeof(rsp_iov)); 2288 2289 /* Open */ 2290 memset(&open_iov, 0, sizeof(open_iov)); 2291 rqst[0].rq_iov = open_iov; 2292 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2293 2294 oparms = (struct cifs_open_parms) { 2295 .tcon = tcon, 2296 .path = path, 2297 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2298 .disposition = FILE_OPEN, 2299 .create_options = cifs_create_options(cifs_sb, 0), 2300 .fid = fid, 2301 .replay = !!(retries), 2302 }; 2303 2304 rc = SMB2_open_init(tcon, server, 2305 &rqst[0], &oplock, &oparms, utf16_path); 2306 if (rc) 2307 goto qdf_free; 2308 smb2_set_next_command(tcon, &rqst[0]); 2309 2310 /* Query directory */ 2311 srch_inf->entries_in_buffer = 0; 2312 srch_inf->index_of_last_entry = 2; 2313 2314 memset(&qd_iov, 0, sizeof(qd_iov)); 2315 rqst[1].rq_iov = qd_iov; 2316 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2317 2318 rc = SMB2_query_directory_init(xid, tcon, server, 2319 &rqst[1], 2320 COMPOUND_FID, COMPOUND_FID, 2321 0, srch_inf->info_level); 2322 if (rc) 2323 goto qdf_free; 2324 2325 smb2_set_related(&rqst[1]); 2326 2327 if (retries) { 2328 smb2_set_replay(server, &rqst[0]); 2329 smb2_set_replay(server, &rqst[1]); 2330 } 2331 2332 rc = compound_send_recv(xid, tcon->ses, server, 2333 flags, 2, rqst, 2334 resp_buftype, rsp_iov); 2335 2336 /* If the open failed there is nothing to do */ 2337 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2338 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2339 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2340 goto qdf_free; 2341 } 2342 fid->persistent_fid = op_rsp->PersistentFileId; 2343 fid->volatile_fid = op_rsp->VolatileFileId; 2344 2345 /* Anything else than ENODATA means a genuine error */ 2346 if (rc && rc != -ENODATA) { 2347 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2348 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2349 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2350 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2351 goto qdf_free; 2352 } 2353 2354 atomic_inc(&tcon->num_remote_opens); 2355 2356 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2357 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2358 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2359 tcon->tid, tcon->ses->Suid, 0, 0); 2360 srch_inf->endOfSearch = true; 2361 rc = 0; 2362 goto qdf_free; 2363 } 2364 2365 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2366 srch_inf); 2367 if (rc) { 2368 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2369 tcon->ses->Suid, 0, 0, rc); 2370 goto qdf_free; 2371 } 2372 resp_buftype[1] = CIFS_NO_BUFFER; 2373 2374 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2375 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2376 2377 qdf_free: 2378 kfree(utf16_path); 2379 SMB2_open_free(&rqst[0]); 2380 SMB2_query_directory_free(&rqst[1]); 2381 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2382 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2383 2384 if (is_replayable_error(rc) && 2385 smb2_should_replay(tcon, &retries, &cur_sleep)) 2386 goto replay_again; 2387 2388 return rc; 2389 } 2390 2391 static int 2392 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2393 struct cifs_fid *fid, __u16 search_flags, 2394 struct cifs_search_info *srch_inf) 2395 { 2396 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2397 fid->volatile_fid, 0, srch_inf); 2398 } 2399 2400 static int 2401 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2402 struct cifs_fid *fid) 2403 { 2404 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2405 } 2406 2407 /* 2408 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2409 * the number of credits and return true. Otherwise - return false. 2410 */ 2411 static bool 2412 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2413 { 2414 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2415 int scredits, in_flight; 2416 2417 if (shdr->Status != STATUS_PENDING) 2418 return false; 2419 2420 if (shdr->CreditRequest) { 2421 spin_lock(&server->req_lock); 2422 server->credits += le16_to_cpu(shdr->CreditRequest); 2423 scredits = server->credits; 2424 in_flight = server->in_flight; 2425 spin_unlock(&server->req_lock); 2426 wake_up(&server->request_q); 2427 2428 trace_smb3_pend_credits(server->CurrentMid, 2429 server->conn_id, server->hostname, scredits, 2430 le16_to_cpu(shdr->CreditRequest), in_flight); 2431 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2432 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2433 } 2434 2435 return true; 2436 } 2437 2438 static bool 2439 smb2_is_session_expired(char *buf) 2440 { 2441 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2442 2443 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2444 shdr->Status != STATUS_USER_SESSION_DELETED) 2445 return false; 2446 2447 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2448 le64_to_cpu(shdr->SessionId), 2449 le16_to_cpu(shdr->Command), 2450 le64_to_cpu(shdr->MessageId)); 2451 cifs_dbg(FYI, "Session expired or deleted\n"); 2452 2453 return true; 2454 } 2455 2456 static bool 2457 smb2_is_status_io_timeout(char *buf) 2458 { 2459 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2460 2461 if (shdr->Status == STATUS_IO_TIMEOUT) 2462 return true; 2463 else 2464 return false; 2465 } 2466 2467 static bool 2468 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2469 { 2470 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2471 struct TCP_Server_Info *pserver; 2472 struct cifs_ses *ses; 2473 struct cifs_tcon *tcon; 2474 2475 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2476 return false; 2477 2478 /* If server is a channel, select the primary channel */ 2479 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2480 2481 spin_lock(&cifs_tcp_ses_lock); 2482 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2483 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2484 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2485 spin_lock(&tcon->tc_lock); 2486 tcon->need_reconnect = true; 2487 spin_unlock(&tcon->tc_lock); 2488 spin_unlock(&cifs_tcp_ses_lock); 2489 pr_warn_once("Server share %s deleted.\n", 2490 tcon->tree_name); 2491 return true; 2492 } 2493 } 2494 } 2495 spin_unlock(&cifs_tcp_ses_lock); 2496 2497 return false; 2498 } 2499 2500 static int 2501 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2502 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2503 { 2504 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2505 return SMB2_lease_break(0, tcon, cinode->lease_key, 2506 smb2_get_lease_state(cinode)); 2507 2508 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2509 CIFS_CACHE_READ(cinode) ? 1 : 0); 2510 } 2511 2512 void 2513 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2514 { 2515 struct smb2_hdr *shdr; 2516 2517 if (server->dialect < SMB30_PROT_ID) 2518 return; 2519 2520 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2521 if (shdr == NULL) { 2522 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2523 return; 2524 } 2525 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2526 } 2527 2528 void 2529 smb2_set_related(struct smb_rqst *rqst) 2530 { 2531 struct smb2_hdr *shdr; 2532 2533 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2534 if (shdr == NULL) { 2535 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2536 return; 2537 } 2538 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2539 } 2540 2541 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2542 2543 void 2544 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2545 { 2546 struct smb2_hdr *shdr; 2547 struct cifs_ses *ses = tcon->ses; 2548 struct TCP_Server_Info *server = ses->server; 2549 unsigned long len = smb_rqst_len(server, rqst); 2550 int i, num_padding; 2551 2552 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2553 if (shdr == NULL) { 2554 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2555 return; 2556 } 2557 2558 /* SMB headers in a compound are 8 byte aligned. */ 2559 2560 /* No padding needed */ 2561 if (!(len & 7)) 2562 goto finished; 2563 2564 num_padding = 8 - (len & 7); 2565 if (!smb3_encryption_required(tcon)) { 2566 /* 2567 * If we do not have encryption then we can just add an extra 2568 * iov for the padding. 2569 */ 2570 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2571 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2572 rqst->rq_nvec++; 2573 len += num_padding; 2574 } else { 2575 /* 2576 * We can not add a small padding iov for the encryption case 2577 * because the encryption framework can not handle the padding 2578 * iovs. 2579 * We have to flatten this into a single buffer and add 2580 * the padding to it. 2581 */ 2582 for (i = 1; i < rqst->rq_nvec; i++) { 2583 memcpy(rqst->rq_iov[0].iov_base + 2584 rqst->rq_iov[0].iov_len, 2585 rqst->rq_iov[i].iov_base, 2586 rqst->rq_iov[i].iov_len); 2587 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2588 } 2589 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2590 0, num_padding); 2591 rqst->rq_iov[0].iov_len += num_padding; 2592 len += num_padding; 2593 rqst->rq_nvec = 1; 2594 } 2595 2596 finished: 2597 shdr->NextCommand = cpu_to_le32(len); 2598 } 2599 2600 /* 2601 * helper function for exponential backoff and check if replayable 2602 */ 2603 bool smb2_should_replay(struct cifs_tcon *tcon, 2604 int *pretries, 2605 int *pcur_sleep) 2606 { 2607 if (!pretries || !pcur_sleep) 2608 return false; 2609 2610 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2611 msleep(*pcur_sleep); 2612 (*pcur_sleep) = ((*pcur_sleep) << 1); 2613 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2614 (*pcur_sleep) = CIFS_MAX_SLEEP; 2615 return true; 2616 } 2617 2618 return false; 2619 } 2620 2621 /* 2622 * Passes the query info response back to the caller on success. 2623 * Caller need to free this with free_rsp_buf(). 2624 */ 2625 int 2626 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2627 const char *path, u32 desired_access, 2628 u32 class, u32 type, u32 output_len, 2629 struct kvec *rsp, int *buftype, 2630 struct cifs_sb_info *cifs_sb) 2631 { 2632 struct smb2_compound_vars *vars; 2633 struct cifs_ses *ses = tcon->ses; 2634 struct TCP_Server_Info *server; 2635 int flags = CIFS_CP_CREATE_CLOSE_OP; 2636 struct smb_rqst *rqst; 2637 int resp_buftype[3]; 2638 struct kvec *rsp_iov; 2639 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2640 struct cifs_open_parms oparms; 2641 struct cifs_fid fid; 2642 int rc; 2643 __le16 *utf16_path; 2644 struct cached_fid *cfid = NULL; 2645 int retries = 0, cur_sleep = 1; 2646 2647 replay_again: 2648 /* reinitialize for possible replay */ 2649 flags = CIFS_CP_CREATE_CLOSE_OP; 2650 oplock = SMB2_OPLOCK_LEVEL_NONE; 2651 server = cifs_pick_channel(ses); 2652 2653 if (!path) 2654 path = ""; 2655 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2656 if (!utf16_path) 2657 return -ENOMEM; 2658 2659 if (smb3_encryption_required(tcon)) 2660 flags |= CIFS_TRANSFORM_REQ; 2661 2662 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2663 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2664 if (!vars) { 2665 rc = -ENOMEM; 2666 goto out_free_path; 2667 } 2668 rqst = vars->rqst; 2669 rsp_iov = vars->rsp_iov; 2670 2671 /* 2672 * We can only call this for things we know are directories. 2673 */ 2674 if (!strcmp(path, "")) 2675 open_cached_dir(xid, tcon, path, cifs_sb, false, 2676 &cfid); /* cfid null if open dir failed */ 2677 2678 rqst[0].rq_iov = vars->open_iov; 2679 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2680 2681 oparms = (struct cifs_open_parms) { 2682 .tcon = tcon, 2683 .path = path, 2684 .desired_access = desired_access, 2685 .disposition = FILE_OPEN, 2686 .create_options = cifs_create_options(cifs_sb, 0), 2687 .fid = &fid, 2688 .replay = !!(retries), 2689 }; 2690 2691 rc = SMB2_open_init(tcon, server, 2692 &rqst[0], &oplock, &oparms, utf16_path); 2693 if (rc) 2694 goto qic_exit; 2695 smb2_set_next_command(tcon, &rqst[0]); 2696 2697 rqst[1].rq_iov = &vars->qi_iov; 2698 rqst[1].rq_nvec = 1; 2699 2700 if (cfid) { 2701 rc = SMB2_query_info_init(tcon, server, 2702 &rqst[1], 2703 cfid->fid.persistent_fid, 2704 cfid->fid.volatile_fid, 2705 class, type, 0, 2706 output_len, 0, 2707 NULL); 2708 } else { 2709 rc = SMB2_query_info_init(tcon, server, 2710 &rqst[1], 2711 COMPOUND_FID, 2712 COMPOUND_FID, 2713 class, type, 0, 2714 output_len, 0, 2715 NULL); 2716 } 2717 if (rc) 2718 goto qic_exit; 2719 if (!cfid) { 2720 smb2_set_next_command(tcon, &rqst[1]); 2721 smb2_set_related(&rqst[1]); 2722 } 2723 2724 rqst[2].rq_iov = &vars->close_iov; 2725 rqst[2].rq_nvec = 1; 2726 2727 rc = SMB2_close_init(tcon, server, 2728 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2729 if (rc) 2730 goto qic_exit; 2731 smb2_set_related(&rqst[2]); 2732 2733 if (retries) { 2734 if (!cfid) { 2735 smb2_set_replay(server, &rqst[0]); 2736 smb2_set_replay(server, &rqst[2]); 2737 } 2738 smb2_set_replay(server, &rqst[1]); 2739 } 2740 2741 if (cfid) { 2742 rc = compound_send_recv(xid, ses, server, 2743 flags, 1, &rqst[1], 2744 &resp_buftype[1], &rsp_iov[1]); 2745 } else { 2746 rc = compound_send_recv(xid, ses, server, 2747 flags, 3, rqst, 2748 resp_buftype, rsp_iov); 2749 } 2750 if (rc) { 2751 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2752 if (rc == -EREMCHG) { 2753 tcon->need_reconnect = true; 2754 pr_warn_once("server share %s deleted\n", 2755 tcon->tree_name); 2756 } 2757 goto qic_exit; 2758 } 2759 *rsp = rsp_iov[1]; 2760 *buftype = resp_buftype[1]; 2761 2762 qic_exit: 2763 SMB2_open_free(&rqst[0]); 2764 SMB2_query_info_free(&rqst[1]); 2765 SMB2_close_free(&rqst[2]); 2766 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2767 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2768 if (cfid) 2769 close_cached_dir(cfid); 2770 kfree(vars); 2771 out_free_path: 2772 kfree(utf16_path); 2773 2774 if (is_replayable_error(rc) && 2775 smb2_should_replay(tcon, &retries, &cur_sleep)) 2776 goto replay_again; 2777 2778 return rc; 2779 } 2780 2781 static int 2782 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2783 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2784 { 2785 struct smb2_query_info_rsp *rsp; 2786 struct smb2_fs_full_size_info *info = NULL; 2787 struct kvec rsp_iov = {NULL, 0}; 2788 int buftype = CIFS_NO_BUFFER; 2789 int rc; 2790 2791 2792 rc = smb2_query_info_compound(xid, tcon, "", 2793 FILE_READ_ATTRIBUTES, 2794 FS_FULL_SIZE_INFORMATION, 2795 SMB2_O_INFO_FILESYSTEM, 2796 sizeof(struct smb2_fs_full_size_info), 2797 &rsp_iov, &buftype, cifs_sb); 2798 if (rc) 2799 goto qfs_exit; 2800 2801 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2802 buf->f_type = SMB2_SUPER_MAGIC; 2803 info = (struct smb2_fs_full_size_info *)( 2804 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2805 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2806 le32_to_cpu(rsp->OutputBufferLength), 2807 &rsp_iov, 2808 sizeof(struct smb2_fs_full_size_info)); 2809 if (!rc) 2810 smb2_copy_fs_info_to_kstatfs(info, buf); 2811 2812 qfs_exit: 2813 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2814 free_rsp_buf(buftype, rsp_iov.iov_base); 2815 return rc; 2816 } 2817 2818 static int 2819 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2820 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2821 { 2822 int rc; 2823 __le16 srch_path = 0; /* Null - open root of share */ 2824 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2825 struct cifs_open_parms oparms; 2826 struct cifs_fid fid; 2827 2828 if (!tcon->posix_extensions) 2829 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2830 2831 oparms = (struct cifs_open_parms) { 2832 .tcon = tcon, 2833 .path = "", 2834 .desired_access = FILE_READ_ATTRIBUTES, 2835 .disposition = FILE_OPEN, 2836 .create_options = cifs_create_options(cifs_sb, 0), 2837 .fid = &fid, 2838 }; 2839 2840 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2841 NULL, NULL); 2842 if (rc) 2843 return rc; 2844 2845 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2846 fid.volatile_fid, buf); 2847 buf->f_type = SMB2_SUPER_MAGIC; 2848 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2849 return rc; 2850 } 2851 2852 static bool 2853 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2854 { 2855 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2856 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2857 } 2858 2859 static int 2860 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2861 __u64 length, __u32 type, int lock, int unlock, bool wait) 2862 { 2863 if (unlock && !lock) 2864 type = SMB2_LOCKFLAG_UNLOCK; 2865 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2866 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2867 current->tgid, length, offset, type, wait); 2868 } 2869 2870 static void 2871 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2872 { 2873 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2874 } 2875 2876 static void 2877 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2878 { 2879 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2880 } 2881 2882 static void 2883 smb2_new_lease_key(struct cifs_fid *fid) 2884 { 2885 generate_random_uuid(fid->lease_key); 2886 } 2887 2888 static int 2889 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2890 const char *search_name, 2891 struct dfs_info3_param **target_nodes, 2892 unsigned int *num_of_nodes, 2893 const struct nls_table *nls_codepage, int remap) 2894 { 2895 int rc; 2896 __le16 *utf16_path = NULL; 2897 int utf16_path_len = 0; 2898 struct cifs_tcon *tcon; 2899 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2900 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2901 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2902 int retry_count = 0; 2903 2904 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2905 2906 /* 2907 * Try to use the IPC tcon, otherwise just use any 2908 */ 2909 tcon = ses->tcon_ipc; 2910 if (tcon == NULL) { 2911 spin_lock(&cifs_tcp_ses_lock); 2912 tcon = list_first_entry_or_null(&ses->tcon_list, 2913 struct cifs_tcon, 2914 tcon_list); 2915 if (tcon) 2916 tcon->tc_count++; 2917 spin_unlock(&cifs_tcp_ses_lock); 2918 } 2919 2920 if (tcon == NULL) { 2921 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2922 ses); 2923 rc = -ENOTCONN; 2924 goto out; 2925 } 2926 2927 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2928 &utf16_path_len, 2929 nls_codepage, remap); 2930 if (!utf16_path) { 2931 rc = -ENOMEM; 2932 goto out; 2933 } 2934 2935 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2936 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2937 if (!dfs_req) { 2938 rc = -ENOMEM; 2939 goto out; 2940 } 2941 2942 /* Highest DFS referral version understood */ 2943 dfs_req->MaxReferralLevel = DFS_VERSION; 2944 2945 /* Path to resolve in an UTF-16 null-terminated string */ 2946 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2947 2948 do { 2949 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2950 FSCTL_DFS_GET_REFERRALS, 2951 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2952 (char **)&dfs_rsp, &dfs_rsp_size); 2953 if (!is_retryable_error(rc)) 2954 break; 2955 usleep_range(512, 2048); 2956 } while (++retry_count < 5); 2957 2958 if (!rc && !dfs_rsp) 2959 rc = -EIO; 2960 if (rc) { 2961 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2962 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2963 goto out; 2964 } 2965 2966 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2967 num_of_nodes, target_nodes, 2968 nls_codepage, remap, search_name, 2969 true /* is_unicode */); 2970 if (rc) { 2971 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2972 goto out; 2973 } 2974 2975 out: 2976 if (tcon && !tcon->ipc) { 2977 /* ipc tcons are not refcounted */ 2978 spin_lock(&cifs_tcp_ses_lock); 2979 tcon->tc_count--; 2980 /* tc_count can never go negative */ 2981 WARN_ON(tcon->tc_count < 0); 2982 spin_unlock(&cifs_tcp_ses_lock); 2983 } 2984 kfree(utf16_path); 2985 kfree(dfs_req); 2986 kfree(dfs_rsp); 2987 return rc; 2988 } 2989 2990 static struct cifs_ntsd * 2991 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 2992 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 2993 { 2994 struct cifs_ntsd *pntsd = NULL; 2995 unsigned int xid; 2996 int rc = -EOPNOTSUPP; 2997 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 2998 2999 if (IS_ERR(tlink)) 3000 return ERR_CAST(tlink); 3001 3002 xid = get_xid(); 3003 cifs_dbg(FYI, "trying to get acl\n"); 3004 3005 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3006 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3007 info); 3008 free_xid(xid); 3009 3010 cifs_put_tlink(tlink); 3011 3012 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3013 if (rc) 3014 return ERR_PTR(rc); 3015 return pntsd; 3016 3017 } 3018 3019 static struct cifs_ntsd * 3020 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3021 const char *path, u32 *pacllen, u32 info) 3022 { 3023 struct cifs_ntsd *pntsd = NULL; 3024 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3025 unsigned int xid; 3026 int rc; 3027 struct cifs_tcon *tcon; 3028 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3029 struct cifs_fid fid; 3030 struct cifs_open_parms oparms; 3031 __le16 *utf16_path; 3032 3033 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3034 if (IS_ERR(tlink)) 3035 return ERR_CAST(tlink); 3036 3037 tcon = tlink_tcon(tlink); 3038 xid = get_xid(); 3039 3040 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3041 if (!utf16_path) { 3042 rc = -ENOMEM; 3043 free_xid(xid); 3044 return ERR_PTR(rc); 3045 } 3046 3047 oparms = (struct cifs_open_parms) { 3048 .tcon = tcon, 3049 .path = path, 3050 .desired_access = READ_CONTROL, 3051 .disposition = FILE_OPEN, 3052 /* 3053 * When querying an ACL, even if the file is a symlink 3054 * we want to open the source not the target, and so 3055 * the protocol requires that the client specify this 3056 * flag when opening a reparse point 3057 */ 3058 .create_options = cifs_create_options(cifs_sb, 0) | 3059 OPEN_REPARSE_POINT, 3060 .fid = &fid, 3061 }; 3062 3063 if (info & SACL_SECINFO) 3064 oparms.desired_access |= SYSTEM_SECURITY; 3065 3066 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3067 NULL); 3068 kfree(utf16_path); 3069 if (!rc) { 3070 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3071 fid.volatile_fid, (void **)&pntsd, pacllen, 3072 info); 3073 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3074 } 3075 3076 cifs_put_tlink(tlink); 3077 free_xid(xid); 3078 3079 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3080 if (rc) 3081 return ERR_PTR(rc); 3082 return pntsd; 3083 } 3084 3085 static int 3086 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3087 struct inode *inode, const char *path, int aclflag) 3088 { 3089 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3090 unsigned int xid; 3091 int rc, access_flags = 0; 3092 struct cifs_tcon *tcon; 3093 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3094 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3095 struct cifs_fid fid; 3096 struct cifs_open_parms oparms; 3097 __le16 *utf16_path; 3098 3099 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3100 if (IS_ERR(tlink)) 3101 return PTR_ERR(tlink); 3102 3103 tcon = tlink_tcon(tlink); 3104 xid = get_xid(); 3105 3106 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3107 access_flags |= WRITE_OWNER; 3108 if (aclflag & CIFS_ACL_SACL) 3109 access_flags |= SYSTEM_SECURITY; 3110 if (aclflag & CIFS_ACL_DACL) 3111 access_flags |= WRITE_DAC; 3112 3113 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3114 if (!utf16_path) { 3115 rc = -ENOMEM; 3116 free_xid(xid); 3117 return rc; 3118 } 3119 3120 oparms = (struct cifs_open_parms) { 3121 .tcon = tcon, 3122 .desired_access = access_flags, 3123 .create_options = cifs_create_options(cifs_sb, 0), 3124 .disposition = FILE_OPEN, 3125 .path = path, 3126 .fid = &fid, 3127 }; 3128 3129 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3130 NULL, NULL); 3131 kfree(utf16_path); 3132 if (!rc) { 3133 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3134 fid.volatile_fid, pnntsd, acllen, aclflag); 3135 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3136 } 3137 3138 cifs_put_tlink(tlink); 3139 free_xid(xid); 3140 return rc; 3141 } 3142 3143 /* Retrieve an ACL from the server */ 3144 static struct cifs_ntsd * 3145 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3146 struct inode *inode, const char *path, 3147 u32 *pacllen, u32 info) 3148 { 3149 struct cifs_ntsd *pntsd = NULL; 3150 struct cifsFileInfo *open_file = NULL; 3151 3152 if (inode && !(info & SACL_SECINFO)) 3153 open_file = find_readable_file(CIFS_I(inode), true); 3154 if (!open_file || (info & SACL_SECINFO)) 3155 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3156 3157 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3158 cifsFileInfo_put(open_file); 3159 return pntsd; 3160 } 3161 3162 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3163 loff_t offset, loff_t len, unsigned int xid) 3164 { 3165 struct cifsFileInfo *cfile = file->private_data; 3166 struct file_zero_data_information fsctl_buf; 3167 3168 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3169 3170 fsctl_buf.FileOffset = cpu_to_le64(offset); 3171 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3172 3173 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3174 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3175 (char *)&fsctl_buf, 3176 sizeof(struct file_zero_data_information), 3177 0, NULL, NULL); 3178 } 3179 3180 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3181 loff_t offset, loff_t len, bool keep_size) 3182 { 3183 struct cifs_ses *ses = tcon->ses; 3184 struct inode *inode = file_inode(file); 3185 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3186 struct cifsFileInfo *cfile = file->private_data; 3187 unsigned long long new_size; 3188 long rc; 3189 unsigned int xid; 3190 3191 xid = get_xid(); 3192 3193 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3194 ses->Suid, offset, len); 3195 3196 inode_lock(inode); 3197 filemap_invalidate_lock(inode->i_mapping); 3198 3199 /* 3200 * We zero the range through ioctl, so we need remove the page caches 3201 * first, otherwise the data may be inconsistent with the server. 3202 */ 3203 truncate_pagecache_range(inode, offset, offset + len - 1); 3204 3205 /* if file not oplocked can't be sure whether asking to extend size */ 3206 rc = -EOPNOTSUPP; 3207 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3208 goto zero_range_exit; 3209 3210 rc = smb3_zero_data(file, tcon, offset, len, xid); 3211 if (rc < 0) 3212 goto zero_range_exit; 3213 3214 /* 3215 * do we also need to change the size of the file? 3216 */ 3217 new_size = offset + len; 3218 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3219 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3220 cfile->fid.volatile_fid, cfile->pid, new_size); 3221 if (rc >= 0) { 3222 truncate_setsize(inode, new_size); 3223 netfs_resize_file(&cifsi->netfs, new_size, true); 3224 if (offset < cifsi->netfs.zero_point) 3225 cifsi->netfs.zero_point = offset; 3226 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3227 } 3228 } 3229 3230 zero_range_exit: 3231 filemap_invalidate_unlock(inode->i_mapping); 3232 inode_unlock(inode); 3233 free_xid(xid); 3234 if (rc) 3235 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3236 ses->Suid, offset, len, rc); 3237 else 3238 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3239 ses->Suid, offset, len); 3240 return rc; 3241 } 3242 3243 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3244 loff_t offset, loff_t len) 3245 { 3246 struct inode *inode = file_inode(file); 3247 struct cifsFileInfo *cfile = file->private_data; 3248 struct file_zero_data_information fsctl_buf; 3249 long rc; 3250 unsigned int xid; 3251 __u8 set_sparse = 1; 3252 3253 xid = get_xid(); 3254 3255 inode_lock(inode); 3256 /* Need to make file sparse, if not already, before freeing range. */ 3257 /* Consider adding equivalent for compressed since it could also work */ 3258 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3259 rc = -EOPNOTSUPP; 3260 goto out; 3261 } 3262 3263 filemap_invalidate_lock(inode->i_mapping); 3264 /* 3265 * We implement the punch hole through ioctl, so we need remove the page 3266 * caches first, otherwise the data may be inconsistent with the server. 3267 */ 3268 truncate_pagecache_range(inode, offset, offset + len - 1); 3269 3270 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3271 3272 fsctl_buf.FileOffset = cpu_to_le64(offset); 3273 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3274 3275 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3276 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3277 (char *)&fsctl_buf, 3278 sizeof(struct file_zero_data_information), 3279 CIFSMaxBufSize, NULL, NULL); 3280 filemap_invalidate_unlock(inode->i_mapping); 3281 out: 3282 inode_unlock(inode); 3283 free_xid(xid); 3284 return rc; 3285 } 3286 3287 static int smb3_simple_fallocate_write_range(unsigned int xid, 3288 struct cifs_tcon *tcon, 3289 struct cifsFileInfo *cfile, 3290 loff_t off, loff_t len, 3291 char *buf) 3292 { 3293 struct cifs_io_parms io_parms = {0}; 3294 int nbytes; 3295 int rc = 0; 3296 struct kvec iov[2]; 3297 3298 io_parms.netfid = cfile->fid.netfid; 3299 io_parms.pid = current->tgid; 3300 io_parms.tcon = tcon; 3301 io_parms.persistent_fid = cfile->fid.persistent_fid; 3302 io_parms.volatile_fid = cfile->fid.volatile_fid; 3303 3304 while (len) { 3305 io_parms.offset = off; 3306 io_parms.length = len; 3307 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3308 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3309 /* iov[0] is reserved for smb header */ 3310 iov[1].iov_base = buf; 3311 iov[1].iov_len = io_parms.length; 3312 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3313 if (rc) 3314 break; 3315 if (nbytes > len) 3316 return -EINVAL; 3317 buf += nbytes; 3318 off += nbytes; 3319 len -= nbytes; 3320 } 3321 return rc; 3322 } 3323 3324 static int smb3_simple_fallocate_range(unsigned int xid, 3325 struct cifs_tcon *tcon, 3326 struct cifsFileInfo *cfile, 3327 loff_t off, loff_t len) 3328 { 3329 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3330 u32 out_data_len; 3331 char *buf = NULL; 3332 loff_t l; 3333 int rc; 3334 3335 in_data.file_offset = cpu_to_le64(off); 3336 in_data.length = cpu_to_le64(len); 3337 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3338 cfile->fid.volatile_fid, 3339 FSCTL_QUERY_ALLOCATED_RANGES, 3340 (char *)&in_data, sizeof(in_data), 3341 1024 * sizeof(struct file_allocated_range_buffer), 3342 (char **)&out_data, &out_data_len); 3343 if (rc) 3344 goto out; 3345 3346 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3347 if (buf == NULL) { 3348 rc = -ENOMEM; 3349 goto out; 3350 } 3351 3352 tmp_data = out_data; 3353 while (len) { 3354 /* 3355 * The rest of the region is unmapped so write it all. 3356 */ 3357 if (out_data_len == 0) { 3358 rc = smb3_simple_fallocate_write_range(xid, tcon, 3359 cfile, off, len, buf); 3360 goto out; 3361 } 3362 3363 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3364 rc = -EINVAL; 3365 goto out; 3366 } 3367 3368 if (off < le64_to_cpu(tmp_data->file_offset)) { 3369 /* 3370 * We are at a hole. Write until the end of the region 3371 * or until the next allocated data, 3372 * whichever comes next. 3373 */ 3374 l = le64_to_cpu(tmp_data->file_offset) - off; 3375 if (len < l) 3376 l = len; 3377 rc = smb3_simple_fallocate_write_range(xid, tcon, 3378 cfile, off, l, buf); 3379 if (rc) 3380 goto out; 3381 off = off + l; 3382 len = len - l; 3383 if (len == 0) 3384 goto out; 3385 } 3386 /* 3387 * We are at a section of allocated data, just skip forward 3388 * until the end of the data or the end of the region 3389 * we are supposed to fallocate, whichever comes first. 3390 */ 3391 l = le64_to_cpu(tmp_data->length); 3392 if (len < l) 3393 l = len; 3394 off += l; 3395 len -= l; 3396 3397 tmp_data = &tmp_data[1]; 3398 out_data_len -= sizeof(struct file_allocated_range_buffer); 3399 } 3400 3401 out: 3402 kfree(out_data); 3403 kfree(buf); 3404 return rc; 3405 } 3406 3407 3408 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3409 loff_t off, loff_t len, bool keep_size) 3410 { 3411 struct inode *inode; 3412 struct cifsInodeInfo *cifsi; 3413 struct cifsFileInfo *cfile = file->private_data; 3414 long rc = -EOPNOTSUPP; 3415 unsigned int xid; 3416 loff_t new_eof; 3417 3418 xid = get_xid(); 3419 3420 inode = d_inode(cfile->dentry); 3421 cifsi = CIFS_I(inode); 3422 3423 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3424 tcon->ses->Suid, off, len); 3425 /* if file not oplocked can't be sure whether asking to extend size */ 3426 if (!CIFS_CACHE_READ(cifsi)) 3427 if (keep_size == false) { 3428 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3429 tcon->tid, tcon->ses->Suid, off, len, rc); 3430 free_xid(xid); 3431 return rc; 3432 } 3433 3434 /* 3435 * Extending the file 3436 */ 3437 if ((keep_size == false) && i_size_read(inode) < off + len) { 3438 rc = inode_newsize_ok(inode, off + len); 3439 if (rc) 3440 goto out; 3441 3442 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3443 smb2_set_sparse(xid, tcon, cfile, inode, false); 3444 3445 new_eof = off + len; 3446 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3447 cfile->fid.volatile_fid, cfile->pid, new_eof); 3448 if (rc == 0) { 3449 netfs_resize_file(&cifsi->netfs, new_eof, true); 3450 cifs_setsize(inode, new_eof); 3451 cifs_truncate_page(inode->i_mapping, inode->i_size); 3452 truncate_setsize(inode, new_eof); 3453 } 3454 goto out; 3455 } 3456 3457 /* 3458 * Files are non-sparse by default so falloc may be a no-op 3459 * Must check if file sparse. If not sparse, and since we are not 3460 * extending then no need to do anything since file already allocated 3461 */ 3462 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3463 rc = 0; 3464 goto out; 3465 } 3466 3467 if (keep_size == true) { 3468 /* 3469 * We can not preallocate pages beyond the end of the file 3470 * in SMB2 3471 */ 3472 if (off >= i_size_read(inode)) { 3473 rc = 0; 3474 goto out; 3475 } 3476 /* 3477 * For fallocates that are partially beyond the end of file, 3478 * clamp len so we only fallocate up to the end of file. 3479 */ 3480 if (off + len > i_size_read(inode)) { 3481 len = i_size_read(inode) - off; 3482 } 3483 } 3484 3485 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3486 /* 3487 * At this point, we are trying to fallocate an internal 3488 * regions of a sparse file. Since smb2 does not have a 3489 * fallocate command we have two otions on how to emulate this. 3490 * We can either turn the entire file to become non-sparse 3491 * which we only do if the fallocate is for virtually 3492 * the whole file, or we can overwrite the region with zeroes 3493 * using SMB2_write, which could be prohibitevly expensive 3494 * if len is large. 3495 */ 3496 /* 3497 * We are only trying to fallocate a small region so 3498 * just write it with zero. 3499 */ 3500 if (len <= 1024 * 1024) { 3501 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3502 off, len); 3503 goto out; 3504 } 3505 3506 /* 3507 * Check if falloc starts within first few pages of file 3508 * and ends within a few pages of the end of file to 3509 * ensure that most of file is being forced to be 3510 * fallocated now. If so then setting whole file sparse 3511 * ie potentially making a few extra pages at the beginning 3512 * or end of the file non-sparse via set_sparse is harmless. 3513 */ 3514 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3515 rc = -EOPNOTSUPP; 3516 goto out; 3517 } 3518 } 3519 3520 smb2_set_sparse(xid, tcon, cfile, inode, false); 3521 rc = 0; 3522 3523 out: 3524 if (rc) 3525 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3526 tcon->ses->Suid, off, len, rc); 3527 else 3528 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3529 tcon->ses->Suid, off, len); 3530 3531 free_xid(xid); 3532 return rc; 3533 } 3534 3535 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3536 loff_t off, loff_t len) 3537 { 3538 int rc; 3539 unsigned int xid; 3540 struct inode *inode = file_inode(file); 3541 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3542 struct cifsFileInfo *cfile = file->private_data; 3543 struct netfs_inode *ictx = &cifsi->netfs; 3544 loff_t old_eof, new_eof; 3545 3546 xid = get_xid(); 3547 3548 inode_lock(inode); 3549 3550 old_eof = i_size_read(inode); 3551 if ((off >= old_eof) || 3552 off + len >= old_eof) { 3553 rc = -EINVAL; 3554 goto out; 3555 } 3556 3557 filemap_invalidate_lock(inode->i_mapping); 3558 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3559 if (rc < 0) 3560 goto out_2; 3561 3562 truncate_pagecache_range(inode, off, old_eof); 3563 ictx->zero_point = old_eof; 3564 3565 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3566 old_eof - off - len, off); 3567 if (rc < 0) 3568 goto out_2; 3569 3570 new_eof = old_eof - len; 3571 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3572 cfile->fid.volatile_fid, cfile->pid, new_eof); 3573 if (rc < 0) 3574 goto out_2; 3575 3576 rc = 0; 3577 3578 truncate_setsize(inode, new_eof); 3579 netfs_resize_file(&cifsi->netfs, new_eof, true); 3580 ictx->zero_point = new_eof; 3581 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3582 out_2: 3583 filemap_invalidate_unlock(inode->i_mapping); 3584 out: 3585 inode_unlock(inode); 3586 free_xid(xid); 3587 return rc; 3588 } 3589 3590 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3591 loff_t off, loff_t len) 3592 { 3593 int rc; 3594 unsigned int xid; 3595 struct cifsFileInfo *cfile = file->private_data; 3596 struct inode *inode = file_inode(file); 3597 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3598 __u64 count, old_eof, new_eof; 3599 3600 xid = get_xid(); 3601 3602 inode_lock(inode); 3603 3604 old_eof = i_size_read(inode); 3605 if (off >= old_eof) { 3606 rc = -EINVAL; 3607 goto out; 3608 } 3609 3610 count = old_eof - off; 3611 new_eof = old_eof + len; 3612 3613 filemap_invalidate_lock(inode->i_mapping); 3614 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3615 if (rc < 0) 3616 goto out_2; 3617 truncate_pagecache_range(inode, off, old_eof); 3618 3619 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3620 cfile->fid.volatile_fid, cfile->pid, new_eof); 3621 if (rc < 0) 3622 goto out_2; 3623 3624 truncate_setsize(inode, new_eof); 3625 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3626 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3627 3628 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3629 if (rc < 0) 3630 goto out_2; 3631 3632 rc = smb3_zero_data(file, tcon, off, len, xid); 3633 if (rc < 0) 3634 goto out_2; 3635 3636 rc = 0; 3637 out_2: 3638 filemap_invalidate_unlock(inode->i_mapping); 3639 out: 3640 inode_unlock(inode); 3641 free_xid(xid); 3642 return rc; 3643 } 3644 3645 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3646 { 3647 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3648 struct cifsInodeInfo *cifsi; 3649 struct inode *inode; 3650 int rc = 0; 3651 struct file_allocated_range_buffer in_data, *out_data = NULL; 3652 u32 out_data_len; 3653 unsigned int xid; 3654 3655 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3656 return generic_file_llseek(file, offset, whence); 3657 3658 inode = d_inode(cfile->dentry); 3659 cifsi = CIFS_I(inode); 3660 3661 if (offset < 0 || offset >= i_size_read(inode)) 3662 return -ENXIO; 3663 3664 xid = get_xid(); 3665 /* 3666 * We need to be sure that all dirty pages are written as they 3667 * might fill holes on the server. 3668 * Note that we also MUST flush any written pages since at least 3669 * some servers (Windows2016) will not reflect recent writes in 3670 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3671 */ 3672 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3673 if (wrcfile) { 3674 filemap_write_and_wait(inode->i_mapping); 3675 smb2_flush_file(xid, tcon, &wrcfile->fid); 3676 cifsFileInfo_put(wrcfile); 3677 } 3678 3679 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3680 if (whence == SEEK_HOLE) 3681 offset = i_size_read(inode); 3682 goto lseek_exit; 3683 } 3684 3685 in_data.file_offset = cpu_to_le64(offset); 3686 in_data.length = cpu_to_le64(i_size_read(inode)); 3687 3688 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3689 cfile->fid.volatile_fid, 3690 FSCTL_QUERY_ALLOCATED_RANGES, 3691 (char *)&in_data, sizeof(in_data), 3692 sizeof(struct file_allocated_range_buffer), 3693 (char **)&out_data, &out_data_len); 3694 if (rc == -E2BIG) 3695 rc = 0; 3696 if (rc) 3697 goto lseek_exit; 3698 3699 if (whence == SEEK_HOLE && out_data_len == 0) 3700 goto lseek_exit; 3701 3702 if (whence == SEEK_DATA && out_data_len == 0) { 3703 rc = -ENXIO; 3704 goto lseek_exit; 3705 } 3706 3707 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3708 rc = -EINVAL; 3709 goto lseek_exit; 3710 } 3711 if (whence == SEEK_DATA) { 3712 offset = le64_to_cpu(out_data->file_offset); 3713 goto lseek_exit; 3714 } 3715 if (offset < le64_to_cpu(out_data->file_offset)) 3716 goto lseek_exit; 3717 3718 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3719 3720 lseek_exit: 3721 free_xid(xid); 3722 kfree(out_data); 3723 if (!rc) 3724 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3725 else 3726 return rc; 3727 } 3728 3729 static int smb3_fiemap(struct cifs_tcon *tcon, 3730 struct cifsFileInfo *cfile, 3731 struct fiemap_extent_info *fei, u64 start, u64 len) 3732 { 3733 unsigned int xid; 3734 struct file_allocated_range_buffer in_data, *out_data; 3735 u32 out_data_len; 3736 int i, num, rc, flags, last_blob; 3737 u64 next; 3738 3739 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3740 if (rc) 3741 return rc; 3742 3743 xid = get_xid(); 3744 again: 3745 in_data.file_offset = cpu_to_le64(start); 3746 in_data.length = cpu_to_le64(len); 3747 3748 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3749 cfile->fid.volatile_fid, 3750 FSCTL_QUERY_ALLOCATED_RANGES, 3751 (char *)&in_data, sizeof(in_data), 3752 1024 * sizeof(struct file_allocated_range_buffer), 3753 (char **)&out_data, &out_data_len); 3754 if (rc == -E2BIG) { 3755 last_blob = 0; 3756 rc = 0; 3757 } else 3758 last_blob = 1; 3759 if (rc) 3760 goto out; 3761 3762 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3763 rc = -EINVAL; 3764 goto out; 3765 } 3766 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3767 rc = -EINVAL; 3768 goto out; 3769 } 3770 3771 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3772 for (i = 0; i < num; i++) { 3773 flags = 0; 3774 if (i == num - 1 && last_blob) 3775 flags |= FIEMAP_EXTENT_LAST; 3776 3777 rc = fiemap_fill_next_extent(fei, 3778 le64_to_cpu(out_data[i].file_offset), 3779 le64_to_cpu(out_data[i].file_offset), 3780 le64_to_cpu(out_data[i].length), 3781 flags); 3782 if (rc < 0) 3783 goto out; 3784 if (rc == 1) { 3785 rc = 0; 3786 goto out; 3787 } 3788 } 3789 3790 if (!last_blob) { 3791 next = le64_to_cpu(out_data[num - 1].file_offset) + 3792 le64_to_cpu(out_data[num - 1].length); 3793 len = len - (next - start); 3794 start = next; 3795 goto again; 3796 } 3797 3798 out: 3799 free_xid(xid); 3800 kfree(out_data); 3801 return rc; 3802 } 3803 3804 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3805 loff_t off, loff_t len) 3806 { 3807 /* KEEP_SIZE already checked for by do_fallocate */ 3808 if (mode & FALLOC_FL_PUNCH_HOLE) 3809 return smb3_punch_hole(file, tcon, off, len); 3810 else if (mode & FALLOC_FL_ZERO_RANGE) { 3811 if (mode & FALLOC_FL_KEEP_SIZE) 3812 return smb3_zero_range(file, tcon, off, len, true); 3813 return smb3_zero_range(file, tcon, off, len, false); 3814 } else if (mode == FALLOC_FL_KEEP_SIZE) 3815 return smb3_simple_falloc(file, tcon, off, len, true); 3816 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3817 return smb3_collapse_range(file, tcon, off, len); 3818 else if (mode == FALLOC_FL_INSERT_RANGE) 3819 return smb3_insert_range(file, tcon, off, len); 3820 else if (mode == 0) 3821 return smb3_simple_falloc(file, tcon, off, len, false); 3822 3823 return -EOPNOTSUPP; 3824 } 3825 3826 static void 3827 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3828 struct cifsInodeInfo *cinode, __u32 oplock, 3829 unsigned int epoch, bool *purge_cache) 3830 { 3831 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3832 } 3833 3834 static void 3835 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3836 unsigned int epoch, bool *purge_cache); 3837 3838 static void 3839 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3840 struct cifsInodeInfo *cinode, __u32 oplock, 3841 unsigned int epoch, bool *purge_cache) 3842 { 3843 unsigned int old_state = cinode->oplock; 3844 unsigned int old_epoch = cinode->epoch; 3845 unsigned int new_state; 3846 3847 if (epoch > old_epoch) { 3848 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3849 cinode->epoch = epoch; 3850 } 3851 3852 new_state = cinode->oplock; 3853 *purge_cache = false; 3854 3855 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3856 (new_state & CIFS_CACHE_READ_FLG) == 0) 3857 *purge_cache = true; 3858 else if (old_state == new_state && (epoch - old_epoch > 1)) 3859 *purge_cache = true; 3860 } 3861 3862 static void 3863 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3864 unsigned int epoch, bool *purge_cache) 3865 { 3866 oplock &= 0xFF; 3867 cinode->lease_granted = false; 3868 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3869 return; 3870 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3871 cinode->oplock = CIFS_CACHE_RHW_FLG; 3872 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3873 &cinode->netfs.inode); 3874 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3875 cinode->oplock = CIFS_CACHE_RW_FLG; 3876 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3877 &cinode->netfs.inode); 3878 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3879 cinode->oplock = CIFS_CACHE_READ_FLG; 3880 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3881 &cinode->netfs.inode); 3882 } else 3883 cinode->oplock = 0; 3884 } 3885 3886 static void 3887 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3888 unsigned int epoch, bool *purge_cache) 3889 { 3890 char message[5] = {0}; 3891 unsigned int new_oplock = 0; 3892 3893 oplock &= 0xFF; 3894 cinode->lease_granted = true; 3895 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3896 return; 3897 3898 /* Check if the server granted an oplock rather than a lease */ 3899 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3900 return smb2_set_oplock_level(cinode, oplock, epoch, 3901 purge_cache); 3902 3903 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3904 new_oplock |= CIFS_CACHE_READ_FLG; 3905 strcat(message, "R"); 3906 } 3907 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3908 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3909 strcat(message, "H"); 3910 } 3911 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3912 new_oplock |= CIFS_CACHE_WRITE_FLG; 3913 strcat(message, "W"); 3914 } 3915 if (!new_oplock) 3916 strncpy(message, "None", sizeof(message)); 3917 3918 cinode->oplock = new_oplock; 3919 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3920 &cinode->netfs.inode); 3921 } 3922 3923 static void 3924 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3925 unsigned int epoch, bool *purge_cache) 3926 { 3927 unsigned int old_oplock = cinode->oplock; 3928 3929 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3930 3931 if (purge_cache) { 3932 *purge_cache = false; 3933 if (old_oplock == CIFS_CACHE_READ_FLG) { 3934 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3935 (epoch - cinode->epoch > 0)) 3936 *purge_cache = true; 3937 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3938 (epoch - cinode->epoch > 1)) 3939 *purge_cache = true; 3940 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3941 (epoch - cinode->epoch > 1)) 3942 *purge_cache = true; 3943 else if (cinode->oplock == 0 && 3944 (epoch - cinode->epoch > 0)) 3945 *purge_cache = true; 3946 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3947 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3948 (epoch - cinode->epoch > 0)) 3949 *purge_cache = true; 3950 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3951 (epoch - cinode->epoch > 1)) 3952 *purge_cache = true; 3953 } 3954 cinode->epoch = epoch; 3955 } 3956 } 3957 3958 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3959 static bool 3960 smb2_is_read_op(__u32 oplock) 3961 { 3962 return oplock == SMB2_OPLOCK_LEVEL_II; 3963 } 3964 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 3965 3966 static bool 3967 smb21_is_read_op(__u32 oplock) 3968 { 3969 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 3970 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 3971 } 3972 3973 static __le32 3974 map_oplock_to_lease(u8 oplock) 3975 { 3976 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3977 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 3978 else if (oplock == SMB2_OPLOCK_LEVEL_II) 3979 return SMB2_LEASE_READ_CACHING_LE; 3980 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 3981 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 3982 SMB2_LEASE_WRITE_CACHING_LE; 3983 return 0; 3984 } 3985 3986 static char * 3987 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 3988 { 3989 struct create_lease *buf; 3990 3991 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 3992 if (!buf) 3993 return NULL; 3994 3995 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 3996 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 3997 3998 buf->ccontext.DataOffset = cpu_to_le16(offsetof 3999 (struct create_lease, lcontext)); 4000 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4001 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4002 (struct create_lease, Name)); 4003 buf->ccontext.NameLength = cpu_to_le16(4); 4004 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4005 buf->Name[0] = 'R'; 4006 buf->Name[1] = 'q'; 4007 buf->Name[2] = 'L'; 4008 buf->Name[3] = 's'; 4009 return (char *)buf; 4010 } 4011 4012 static char * 4013 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4014 { 4015 struct create_lease_v2 *buf; 4016 4017 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4018 if (!buf) 4019 return NULL; 4020 4021 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4022 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4023 4024 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4025 (struct create_lease_v2, lcontext)); 4026 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4027 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4028 (struct create_lease_v2, Name)); 4029 buf->ccontext.NameLength = cpu_to_le16(4); 4030 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4031 buf->Name[0] = 'R'; 4032 buf->Name[1] = 'q'; 4033 buf->Name[2] = 'L'; 4034 buf->Name[3] = 's'; 4035 return (char *)buf; 4036 } 4037 4038 static __u8 4039 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4040 { 4041 struct create_lease *lc = (struct create_lease *)buf; 4042 4043 *epoch = 0; /* not used */ 4044 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4045 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4046 return le32_to_cpu(lc->lcontext.LeaseState); 4047 } 4048 4049 static __u8 4050 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4051 { 4052 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4053 4054 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4055 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4056 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4057 if (lease_key) 4058 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4059 return le32_to_cpu(lc->lcontext.LeaseState); 4060 } 4061 4062 static unsigned int 4063 smb2_wp_retry_size(struct inode *inode) 4064 { 4065 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4066 SMB2_MAX_BUFFER_SIZE); 4067 } 4068 4069 static bool 4070 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4071 { 4072 return !cfile->invalidHandle; 4073 } 4074 4075 static void 4076 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4077 struct smb_rqst *old_rq, __le16 cipher_type) 4078 { 4079 struct smb2_hdr *shdr = 4080 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4081 4082 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4083 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4084 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4085 tr_hdr->Flags = cpu_to_le16(0x01); 4086 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4087 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4088 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4089 else 4090 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4091 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4092 } 4093 4094 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4095 int num_rqst, const u8 *sig, u8 **iv, 4096 struct aead_request **req, struct sg_table *sgt, 4097 unsigned int *num_sgs, size_t *sensitive_size) 4098 { 4099 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4100 unsigned int iv_size = crypto_aead_ivsize(tfm); 4101 unsigned int len; 4102 u8 *p; 4103 4104 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4105 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4106 return ERR_PTR(*num_sgs); 4107 4108 len = iv_size; 4109 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4110 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4111 len += req_size; 4112 len = ALIGN(len, __alignof__(struct scatterlist)); 4113 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4114 *sensitive_size = len; 4115 4116 p = kvzalloc(len, GFP_NOFS); 4117 if (!p) 4118 return ERR_PTR(-ENOMEM); 4119 4120 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4121 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4122 crypto_tfm_ctx_alignment()); 4123 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4124 __alignof__(struct scatterlist)); 4125 return p; 4126 } 4127 4128 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4129 int num_rqst, const u8 *sig, u8 **iv, 4130 struct aead_request **req, struct scatterlist **sgl, 4131 size_t *sensitive_size) 4132 { 4133 struct sg_table sgtable = {}; 4134 unsigned int skip, num_sgs, i, j; 4135 ssize_t rc; 4136 void *p; 4137 4138 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4139 &num_sgs, sensitive_size); 4140 if (IS_ERR(p)) 4141 return ERR_CAST(p); 4142 4143 sg_init_marker(sgtable.sgl, num_sgs); 4144 4145 /* 4146 * The first rqst has a transform header where the 4147 * first 20 bytes are not part of the encrypted blob. 4148 */ 4149 skip = 20; 4150 4151 for (i = 0; i < num_rqst; i++) { 4152 struct iov_iter *iter = &rqst[i].rq_iter; 4153 size_t count = iov_iter_count(iter); 4154 4155 for (j = 0; j < rqst[i].rq_nvec; j++) { 4156 cifs_sg_set_buf(&sgtable, 4157 rqst[i].rq_iov[j].iov_base + skip, 4158 rqst[i].rq_iov[j].iov_len - skip); 4159 4160 /* See the above comment on the 'skip' assignment */ 4161 skip = 0; 4162 } 4163 sgtable.orig_nents = sgtable.nents; 4164 4165 rc = extract_iter_to_sg(iter, count, &sgtable, 4166 num_sgs - sgtable.nents, 0); 4167 iov_iter_revert(iter, rc); 4168 sgtable.orig_nents = sgtable.nents; 4169 } 4170 4171 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4172 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4173 *sgl = sgtable.sgl; 4174 return p; 4175 } 4176 4177 static int 4178 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4179 { 4180 struct TCP_Server_Info *pserver; 4181 struct cifs_ses *ses; 4182 u8 *ses_enc_key; 4183 4184 /* If server is a channel, select the primary channel */ 4185 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4186 4187 spin_lock(&cifs_tcp_ses_lock); 4188 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4189 if (ses->Suid == ses_id) { 4190 spin_lock(&ses->ses_lock); 4191 ses_enc_key = enc ? ses->smb3encryptionkey : 4192 ses->smb3decryptionkey; 4193 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4194 spin_unlock(&ses->ses_lock); 4195 spin_unlock(&cifs_tcp_ses_lock); 4196 return 0; 4197 } 4198 } 4199 spin_unlock(&cifs_tcp_ses_lock); 4200 4201 trace_smb3_ses_not_found(ses_id); 4202 4203 return -EAGAIN; 4204 } 4205 /* 4206 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4207 * iov[0] - transform header (associate data), 4208 * iov[1-N] - SMB2 header and pages - data to encrypt. 4209 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4210 * untouched. 4211 */ 4212 static int 4213 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4214 struct smb_rqst *rqst, int enc) 4215 { 4216 struct smb2_transform_hdr *tr_hdr = 4217 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4218 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4219 int rc = 0; 4220 struct scatterlist *sg; 4221 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4222 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4223 struct aead_request *req; 4224 u8 *iv; 4225 DECLARE_CRYPTO_WAIT(wait); 4226 struct crypto_aead *tfm; 4227 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4228 void *creq; 4229 size_t sensitive_size; 4230 4231 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4232 if (rc) { 4233 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4234 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4235 return rc; 4236 } 4237 4238 rc = smb3_crypto_aead_allocate(server); 4239 if (rc) { 4240 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4241 return rc; 4242 } 4243 4244 tfm = enc ? server->secmech.enc : server->secmech.dec; 4245 4246 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4247 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4248 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4249 else 4250 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4251 4252 if (rc) { 4253 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4254 return rc; 4255 } 4256 4257 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4258 if (rc) { 4259 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4260 return rc; 4261 } 4262 4263 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4264 &sensitive_size); 4265 if (IS_ERR(creq)) 4266 return PTR_ERR(creq); 4267 4268 if (!enc) { 4269 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4270 crypt_len += SMB2_SIGNATURE_SIZE; 4271 } 4272 4273 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4274 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4275 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4276 else { 4277 iv[0] = 3; 4278 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4279 } 4280 4281 aead_request_set_tfm(req, tfm); 4282 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4283 aead_request_set_ad(req, assoc_data_len); 4284 4285 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4286 crypto_req_done, &wait); 4287 4288 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4289 : crypto_aead_decrypt(req), &wait); 4290 4291 if (!rc && enc) 4292 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4293 4294 kvfree_sensitive(creq, sensitive_size); 4295 return rc; 4296 } 4297 4298 /* 4299 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4300 */ 4301 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4302 { 4303 struct folio *folio; 4304 4305 XA_STATE(xas, buffer, 0); 4306 4307 rcu_read_lock(); 4308 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4309 folio_put(folio); 4310 } 4311 rcu_read_unlock(); 4312 xa_destroy(buffer); 4313 } 4314 4315 void 4316 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4317 { 4318 int i; 4319 4320 for (i = 0; i < num_rqst; i++) 4321 if (!xa_empty(&rqst[i].rq_buffer)) 4322 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4323 } 4324 4325 /* 4326 * This function will initialize new_rq and encrypt the content. 4327 * The first entry, new_rq[0], only contains a single iov which contains 4328 * a smb2_transform_hdr and is pre-allocated by the caller. 4329 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4330 * 4331 * The end result is an array of smb_rqst structures where the first structure 4332 * only contains a single iov for the transform header which we then can pass 4333 * to crypt_message(). 4334 * 4335 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4336 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4337 */ 4338 static int 4339 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4340 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4341 { 4342 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4343 struct page *page; 4344 unsigned int orig_len = 0; 4345 int i, j; 4346 int rc = -ENOMEM; 4347 4348 for (i = 1; i < num_rqst; i++) { 4349 struct smb_rqst *old = &old_rq[i - 1]; 4350 struct smb_rqst *new = &new_rq[i]; 4351 struct xarray *buffer = &new->rq_buffer; 4352 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4353 4354 orig_len += smb_rqst_len(server, old); 4355 new->rq_iov = old->rq_iov; 4356 new->rq_nvec = old->rq_nvec; 4357 4358 xa_init(buffer); 4359 4360 if (size > 0) { 4361 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4362 4363 for (j = 0; j < npages; j++) { 4364 void *o; 4365 4366 rc = -ENOMEM; 4367 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4368 if (!page) 4369 goto err_free; 4370 page->index = j; 4371 o = xa_store(buffer, j, page, GFP_KERNEL); 4372 if (xa_is_err(o)) { 4373 rc = xa_err(o); 4374 put_page(page); 4375 goto err_free; 4376 } 4377 4378 xa_set_mark(buffer, j, XA_MARK_0); 4379 4380 seg = min_t(size_t, size - copied, PAGE_SIZE); 4381 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4382 rc = -EFAULT; 4383 goto err_free; 4384 } 4385 copied += seg; 4386 } 4387 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4388 buffer, 0, size); 4389 new->rq_iter_size = size; 4390 } 4391 } 4392 4393 /* fill the 1st iov with a transform header */ 4394 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4395 4396 rc = crypt_message(server, num_rqst, new_rq, 1); 4397 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4398 if (rc) 4399 goto err_free; 4400 4401 return rc; 4402 4403 err_free: 4404 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4405 return rc; 4406 } 4407 4408 static int 4409 smb3_is_transform_hdr(void *buf) 4410 { 4411 struct smb2_transform_hdr *trhdr = buf; 4412 4413 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4414 } 4415 4416 static int 4417 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4418 unsigned int buf_data_size, struct iov_iter *iter, 4419 bool is_offloaded) 4420 { 4421 struct kvec iov[2]; 4422 struct smb_rqst rqst = {NULL}; 4423 size_t iter_size = 0; 4424 int rc; 4425 4426 iov[0].iov_base = buf; 4427 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4428 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4429 iov[1].iov_len = buf_data_size; 4430 4431 rqst.rq_iov = iov; 4432 rqst.rq_nvec = 2; 4433 if (iter) { 4434 rqst.rq_iter = *iter; 4435 rqst.rq_iter_size = iov_iter_count(iter); 4436 iter_size = iov_iter_count(iter); 4437 } 4438 4439 rc = crypt_message(server, 1, &rqst, 0); 4440 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4441 4442 if (rc) 4443 return rc; 4444 4445 memmove(buf, iov[1].iov_base, buf_data_size); 4446 4447 if (!is_offloaded) 4448 server->total_read = buf_data_size + iter_size; 4449 4450 return rc; 4451 } 4452 4453 static int 4454 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4455 unsigned int skip, struct iov_iter *iter) 4456 { 4457 struct page *page; 4458 unsigned long index; 4459 4460 xa_for_each(pages, index, page) { 4461 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4462 4463 n = copy_page_to_iter(page, skip, len, iter); 4464 if (n != len) { 4465 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4466 return -EIO; 4467 } 4468 data_size -= n; 4469 skip = 0; 4470 } 4471 4472 return 0; 4473 } 4474 4475 static int 4476 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4477 char *buf, unsigned int buf_len, struct xarray *pages, 4478 unsigned int pages_len, bool is_offloaded) 4479 { 4480 unsigned int data_offset; 4481 unsigned int data_len; 4482 unsigned int cur_off; 4483 unsigned int cur_page_idx; 4484 unsigned int pad_len; 4485 struct cifs_readdata *rdata = mid->callback_data; 4486 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4487 int length; 4488 bool use_rdma_mr = false; 4489 4490 if (shdr->Command != SMB2_READ) { 4491 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4492 return -EOPNOTSUPP; 4493 } 4494 4495 if (server->ops->is_session_expired && 4496 server->ops->is_session_expired(buf)) { 4497 if (!is_offloaded) 4498 cifs_reconnect(server, true); 4499 return -1; 4500 } 4501 4502 if (server->ops->is_status_pending && 4503 server->ops->is_status_pending(buf, server)) 4504 return -1; 4505 4506 /* set up first two iov to get credits */ 4507 rdata->iov[0].iov_base = buf; 4508 rdata->iov[0].iov_len = 0; 4509 rdata->iov[1].iov_base = buf; 4510 rdata->iov[1].iov_len = 4511 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4512 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4513 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4514 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4515 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4516 4517 rdata->result = server->ops->map_error(buf, true); 4518 if (rdata->result != 0) { 4519 cifs_dbg(FYI, "%s: server returned error %d\n", 4520 __func__, rdata->result); 4521 /* normal error on read response */ 4522 if (is_offloaded) 4523 mid->mid_state = MID_RESPONSE_RECEIVED; 4524 else 4525 dequeue_mid(mid, false); 4526 return 0; 4527 } 4528 4529 data_offset = server->ops->read_data_offset(buf); 4530 #ifdef CONFIG_CIFS_SMB_DIRECT 4531 use_rdma_mr = rdata->mr; 4532 #endif 4533 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4534 4535 if (data_offset < server->vals->read_rsp_size) { 4536 /* 4537 * win2k8 sometimes sends an offset of 0 when the read 4538 * is beyond the EOF. Treat it as if the data starts just after 4539 * the header. 4540 */ 4541 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4542 __func__, data_offset); 4543 data_offset = server->vals->read_rsp_size; 4544 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4545 /* data_offset is beyond the end of smallbuf */ 4546 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4547 __func__, data_offset); 4548 rdata->result = -EIO; 4549 if (is_offloaded) 4550 mid->mid_state = MID_RESPONSE_MALFORMED; 4551 else 4552 dequeue_mid(mid, rdata->result); 4553 return 0; 4554 } 4555 4556 pad_len = data_offset - server->vals->read_rsp_size; 4557 4558 if (buf_len <= data_offset) { 4559 /* read response payload is in pages */ 4560 cur_page_idx = pad_len / PAGE_SIZE; 4561 cur_off = pad_len % PAGE_SIZE; 4562 4563 if (cur_page_idx != 0) { 4564 /* data offset is beyond the 1st page of response */ 4565 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4566 __func__, data_offset); 4567 rdata->result = -EIO; 4568 if (is_offloaded) 4569 mid->mid_state = MID_RESPONSE_MALFORMED; 4570 else 4571 dequeue_mid(mid, rdata->result); 4572 return 0; 4573 } 4574 4575 if (data_len > pages_len - pad_len) { 4576 /* data_len is corrupt -- discard frame */ 4577 rdata->result = -EIO; 4578 if (is_offloaded) 4579 mid->mid_state = MID_RESPONSE_MALFORMED; 4580 else 4581 dequeue_mid(mid, rdata->result); 4582 return 0; 4583 } 4584 4585 /* Copy the data to the output I/O iterator. */ 4586 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4587 cur_off, &rdata->iter); 4588 if (rdata->result != 0) { 4589 if (is_offloaded) 4590 mid->mid_state = MID_RESPONSE_MALFORMED; 4591 else 4592 dequeue_mid(mid, rdata->result); 4593 return 0; 4594 } 4595 rdata->got_bytes = pages_len; 4596 4597 } else if (buf_len >= data_offset + data_len) { 4598 /* read response payload is in buf */ 4599 WARN_ONCE(pages && !xa_empty(pages), 4600 "read data can be either in buf or in pages"); 4601 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4602 if (length < 0) 4603 return length; 4604 rdata->got_bytes = data_len; 4605 } else { 4606 /* read response payload cannot be in both buf and pages */ 4607 WARN_ONCE(1, "buf can not contain only a part of read data"); 4608 rdata->result = -EIO; 4609 if (is_offloaded) 4610 mid->mid_state = MID_RESPONSE_MALFORMED; 4611 else 4612 dequeue_mid(mid, rdata->result); 4613 return 0; 4614 } 4615 4616 if (is_offloaded) 4617 mid->mid_state = MID_RESPONSE_RECEIVED; 4618 else 4619 dequeue_mid(mid, false); 4620 return 0; 4621 } 4622 4623 struct smb2_decrypt_work { 4624 struct work_struct decrypt; 4625 struct TCP_Server_Info *server; 4626 struct xarray buffer; 4627 char *buf; 4628 unsigned int len; 4629 }; 4630 4631 4632 static void smb2_decrypt_offload(struct work_struct *work) 4633 { 4634 struct smb2_decrypt_work *dw = container_of(work, 4635 struct smb2_decrypt_work, decrypt); 4636 int rc; 4637 struct mid_q_entry *mid; 4638 struct iov_iter iter; 4639 4640 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4641 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4642 &iter, true); 4643 if (rc) { 4644 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4645 goto free_pages; 4646 } 4647 4648 dw->server->lstrp = jiffies; 4649 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4650 if (mid == NULL) 4651 cifs_dbg(FYI, "mid not found\n"); 4652 else { 4653 mid->decrypted = true; 4654 rc = handle_read_data(dw->server, mid, dw->buf, 4655 dw->server->vals->read_rsp_size, 4656 &dw->buffer, dw->len, 4657 true); 4658 if (rc >= 0) { 4659 #ifdef CONFIG_CIFS_STATS2 4660 mid->when_received = jiffies; 4661 #endif 4662 if (dw->server->ops->is_network_name_deleted) 4663 dw->server->ops->is_network_name_deleted(dw->buf, 4664 dw->server); 4665 4666 mid->callback(mid); 4667 } else { 4668 spin_lock(&dw->server->srv_lock); 4669 if (dw->server->tcpStatus == CifsNeedReconnect) { 4670 spin_lock(&dw->server->mid_lock); 4671 mid->mid_state = MID_RETRY_NEEDED; 4672 spin_unlock(&dw->server->mid_lock); 4673 spin_unlock(&dw->server->srv_lock); 4674 mid->callback(mid); 4675 } else { 4676 spin_lock(&dw->server->mid_lock); 4677 mid->mid_state = MID_REQUEST_SUBMITTED; 4678 mid->mid_flags &= ~(MID_DELETED); 4679 list_add_tail(&mid->qhead, 4680 &dw->server->pending_mid_q); 4681 spin_unlock(&dw->server->mid_lock); 4682 spin_unlock(&dw->server->srv_lock); 4683 } 4684 } 4685 release_mid(mid); 4686 } 4687 4688 free_pages: 4689 cifs_clear_xarray_buffer(&dw->buffer); 4690 cifs_small_buf_release(dw->buf); 4691 kfree(dw); 4692 } 4693 4694 4695 static int 4696 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4697 int *num_mids) 4698 { 4699 struct page *page; 4700 char *buf = server->smallbuf; 4701 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4702 struct iov_iter iter; 4703 unsigned int len, npages; 4704 unsigned int buflen = server->pdu_size; 4705 int rc; 4706 int i = 0; 4707 struct smb2_decrypt_work *dw; 4708 4709 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4710 if (!dw) 4711 return -ENOMEM; 4712 xa_init(&dw->buffer); 4713 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4714 dw->server = server; 4715 4716 *num_mids = 1; 4717 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4718 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4719 4720 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4721 if (rc < 0) 4722 goto free_dw; 4723 server->total_read += rc; 4724 4725 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4726 server->vals->read_rsp_size; 4727 dw->len = len; 4728 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4729 4730 rc = -ENOMEM; 4731 for (; i < npages; i++) { 4732 void *old; 4733 4734 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4735 if (!page) 4736 goto discard_data; 4737 page->index = i; 4738 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4739 if (xa_is_err(old)) { 4740 rc = xa_err(old); 4741 put_page(page); 4742 goto discard_data; 4743 } 4744 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4745 } 4746 4747 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4748 4749 /* Read the data into the buffer and clear excess bufferage. */ 4750 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4751 if (rc < 0) 4752 goto discard_data; 4753 4754 server->total_read += rc; 4755 if (rc < npages * PAGE_SIZE) 4756 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4757 iov_iter_revert(&iter, npages * PAGE_SIZE); 4758 iov_iter_truncate(&iter, dw->len); 4759 4760 rc = cifs_discard_remaining_data(server); 4761 if (rc) 4762 goto free_pages; 4763 4764 /* 4765 * For large reads, offload to different thread for better performance, 4766 * use more cores decrypting which can be expensive 4767 */ 4768 4769 if ((server->min_offload) && (server->in_flight > 1) && 4770 (server->pdu_size >= server->min_offload)) { 4771 dw->buf = server->smallbuf; 4772 server->smallbuf = (char *)cifs_small_buf_get(); 4773 4774 queue_work(decrypt_wq, &dw->decrypt); 4775 *num_mids = 0; /* worker thread takes care of finding mid */ 4776 return -1; 4777 } 4778 4779 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4780 &iter, false); 4781 if (rc) 4782 goto free_pages; 4783 4784 *mid = smb2_find_mid(server, buf); 4785 if (*mid == NULL) { 4786 cifs_dbg(FYI, "mid not found\n"); 4787 } else { 4788 cifs_dbg(FYI, "mid found\n"); 4789 (*mid)->decrypted = true; 4790 rc = handle_read_data(server, *mid, buf, 4791 server->vals->read_rsp_size, 4792 &dw->buffer, dw->len, false); 4793 if (rc >= 0) { 4794 if (server->ops->is_network_name_deleted) { 4795 server->ops->is_network_name_deleted(buf, 4796 server); 4797 } 4798 } 4799 } 4800 4801 free_pages: 4802 cifs_clear_xarray_buffer(&dw->buffer); 4803 free_dw: 4804 kfree(dw); 4805 return rc; 4806 discard_data: 4807 cifs_discard_remaining_data(server); 4808 goto free_pages; 4809 } 4810 4811 static int 4812 receive_encrypted_standard(struct TCP_Server_Info *server, 4813 struct mid_q_entry **mids, char **bufs, 4814 int *num_mids) 4815 { 4816 int ret, length; 4817 char *buf = server->smallbuf; 4818 struct smb2_hdr *shdr; 4819 unsigned int pdu_length = server->pdu_size; 4820 unsigned int buf_size; 4821 unsigned int next_cmd; 4822 struct mid_q_entry *mid_entry; 4823 int next_is_large; 4824 char *next_buffer = NULL; 4825 4826 *num_mids = 0; 4827 4828 /* switch to large buffer if too big for a small one */ 4829 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4830 server->large_buf = true; 4831 memcpy(server->bigbuf, buf, server->total_read); 4832 buf = server->bigbuf; 4833 } 4834 4835 /* now read the rest */ 4836 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4837 pdu_length - HEADER_SIZE(server) + 1); 4838 if (length < 0) 4839 return length; 4840 server->total_read += length; 4841 4842 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4843 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4844 if (length) 4845 return length; 4846 4847 next_is_large = server->large_buf; 4848 one_more: 4849 shdr = (struct smb2_hdr *)buf; 4850 next_cmd = le32_to_cpu(shdr->NextCommand); 4851 if (next_cmd) { 4852 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4853 return -1; 4854 if (next_is_large) 4855 next_buffer = (char *)cifs_buf_get(); 4856 else 4857 next_buffer = (char *)cifs_small_buf_get(); 4858 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4859 } 4860 4861 mid_entry = smb2_find_mid(server, buf); 4862 if (mid_entry == NULL) 4863 cifs_dbg(FYI, "mid not found\n"); 4864 else { 4865 cifs_dbg(FYI, "mid found\n"); 4866 mid_entry->decrypted = true; 4867 mid_entry->resp_buf_size = server->pdu_size; 4868 } 4869 4870 if (*num_mids >= MAX_COMPOUND) { 4871 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4872 return -1; 4873 } 4874 bufs[*num_mids] = buf; 4875 mids[(*num_mids)++] = mid_entry; 4876 4877 if (mid_entry && mid_entry->handle) 4878 ret = mid_entry->handle(server, mid_entry); 4879 else 4880 ret = cifs_handle_standard(server, mid_entry); 4881 4882 if (ret == 0 && next_cmd) { 4883 pdu_length -= next_cmd; 4884 server->large_buf = next_is_large; 4885 if (next_is_large) 4886 server->bigbuf = buf = next_buffer; 4887 else 4888 server->smallbuf = buf = next_buffer; 4889 goto one_more; 4890 } else if (ret != 0) { 4891 /* 4892 * ret != 0 here means that we didn't get to handle_mid() thus 4893 * server->smallbuf and server->bigbuf are still valid. We need 4894 * to free next_buffer because it is not going to be used 4895 * anywhere. 4896 */ 4897 if (next_is_large) 4898 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4899 else 4900 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4901 } 4902 4903 return ret; 4904 } 4905 4906 static int 4907 smb3_receive_transform(struct TCP_Server_Info *server, 4908 struct mid_q_entry **mids, char **bufs, int *num_mids) 4909 { 4910 char *buf = server->smallbuf; 4911 unsigned int pdu_length = server->pdu_size; 4912 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4913 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4914 4915 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4916 sizeof(struct smb2_hdr)) { 4917 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4918 pdu_length); 4919 cifs_reconnect(server, true); 4920 return -ECONNABORTED; 4921 } 4922 4923 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4924 cifs_server_dbg(VFS, "Transform message is broken\n"); 4925 cifs_reconnect(server, true); 4926 return -ECONNABORTED; 4927 } 4928 4929 /* TODO: add support for compounds containing READ. */ 4930 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4931 return receive_encrypted_read(server, &mids[0], num_mids); 4932 } 4933 4934 return receive_encrypted_standard(server, mids, bufs, num_mids); 4935 } 4936 4937 int 4938 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4939 { 4940 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4941 4942 return handle_read_data(server, mid, buf, server->pdu_size, 4943 NULL, 0, false); 4944 } 4945 4946 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4947 unsigned int *noff) 4948 { 4949 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4950 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 4951 4952 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 4953 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 4954 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 4955 return -EINVAL; 4956 } else { 4957 *noff = le32_to_cpu(hdr->NextCommand); 4958 } 4959 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 4960 return -EINVAL; 4961 return 0; 4962 } 4963 4964 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 4965 struct dentry *dentry, struct cifs_tcon *tcon, 4966 const char *full_path, umode_t mode, dev_t dev) 4967 { 4968 struct cifs_open_info_data buf = {}; 4969 struct TCP_Server_Info *server = tcon->ses->server; 4970 struct cifs_open_parms oparms; 4971 struct cifs_io_parms io_parms = {}; 4972 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 4973 struct cifs_fid fid; 4974 unsigned int bytes_written; 4975 struct win_dev *pdev; 4976 struct kvec iov[2]; 4977 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 4978 int rc; 4979 4980 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 4981 return -EPERM; 4982 4983 oparms = (struct cifs_open_parms) { 4984 .tcon = tcon, 4985 .cifs_sb = cifs_sb, 4986 .desired_access = GENERIC_WRITE, 4987 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 4988 CREATE_OPTION_SPECIAL), 4989 .disposition = FILE_CREATE, 4990 .path = full_path, 4991 .fid = &fid, 4992 }; 4993 4994 rc = server->ops->open(xid, &oparms, &oplock, &buf); 4995 if (rc) 4996 return rc; 4997 4998 /* 4999 * BB Do not bother to decode buf since no local inode yet to put 5000 * timestamps in, but we can reuse it safely. 5001 */ 5002 pdev = (struct win_dev *)&buf.fi; 5003 io_parms.pid = current->tgid; 5004 io_parms.tcon = tcon; 5005 io_parms.length = sizeof(*pdev); 5006 iov[1].iov_base = pdev; 5007 iov[1].iov_len = sizeof(*pdev); 5008 if (S_ISCHR(mode)) { 5009 memcpy(pdev->type, "IntxCHR", 8); 5010 pdev->major = cpu_to_le64(MAJOR(dev)); 5011 pdev->minor = cpu_to_le64(MINOR(dev)); 5012 } else if (S_ISBLK(mode)) { 5013 memcpy(pdev->type, "IntxBLK", 8); 5014 pdev->major = cpu_to_le64(MAJOR(dev)); 5015 pdev->minor = cpu_to_le64(MINOR(dev)); 5016 } else if (S_ISFIFO(mode)) { 5017 memcpy(pdev->type, "LnxFIFO", 8); 5018 } 5019 5020 rc = server->ops->sync_write(xid, &fid, &io_parms, 5021 &bytes_written, iov, 1); 5022 server->ops->close(xid, tcon, &fid); 5023 d_drop(dentry); 5024 /* FIXME: add code here to set EAs */ 5025 cifs_free_open_info(&buf); 5026 return rc; 5027 } 5028 5029 static int smb2_make_node(unsigned int xid, struct inode *inode, 5030 struct dentry *dentry, struct cifs_tcon *tcon, 5031 const char *full_path, umode_t mode, dev_t dev) 5032 { 5033 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5034 int rc; 5035 5036 /* 5037 * Check if mounted with mount parm 'sfu' mount parm. 5038 * SFU emulation should work with all servers, but only 5039 * supports block and char device (no socket & fifo), 5040 * and was used by default in earlier versions of Windows 5041 */ 5042 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5043 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5044 full_path, mode, dev); 5045 } else { 5046 rc = smb2_mknod_reparse(xid, inode, dentry, tcon, 5047 full_path, mode, dev); 5048 } 5049 return rc; 5050 } 5051 5052 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5053 struct smb_version_operations smb20_operations = { 5054 .compare_fids = smb2_compare_fids, 5055 .setup_request = smb2_setup_request, 5056 .setup_async_request = smb2_setup_async_request, 5057 .check_receive = smb2_check_receive, 5058 .add_credits = smb2_add_credits, 5059 .set_credits = smb2_set_credits, 5060 .get_credits_field = smb2_get_credits_field, 5061 .get_credits = smb2_get_credits, 5062 .wait_mtu_credits = cifs_wait_mtu_credits, 5063 .get_next_mid = smb2_get_next_mid, 5064 .revert_current_mid = smb2_revert_current_mid, 5065 .read_data_offset = smb2_read_data_offset, 5066 .read_data_length = smb2_read_data_length, 5067 .map_error = map_smb2_to_linux_error, 5068 .find_mid = smb2_find_mid, 5069 .check_message = smb2_check_message, 5070 .dump_detail = smb2_dump_detail, 5071 .clear_stats = smb2_clear_stats, 5072 .print_stats = smb2_print_stats, 5073 .is_oplock_break = smb2_is_valid_oplock_break, 5074 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5075 .downgrade_oplock = smb2_downgrade_oplock, 5076 .need_neg = smb2_need_neg, 5077 .negotiate = smb2_negotiate, 5078 .negotiate_wsize = smb2_negotiate_wsize, 5079 .negotiate_rsize = smb2_negotiate_rsize, 5080 .sess_setup = SMB2_sess_setup, 5081 .logoff = SMB2_logoff, 5082 .tree_connect = SMB2_tcon, 5083 .tree_disconnect = SMB2_tdis, 5084 .qfs_tcon = smb2_qfs_tcon, 5085 .is_path_accessible = smb2_is_path_accessible, 5086 .can_echo = smb2_can_echo, 5087 .echo = SMB2_echo, 5088 .query_path_info = smb2_query_path_info, 5089 .query_reparse_point = smb2_query_reparse_point, 5090 .get_srv_inum = smb2_get_srv_inum, 5091 .query_file_info = smb2_query_file_info, 5092 .set_path_size = smb2_set_path_size, 5093 .set_file_size = smb2_set_file_size, 5094 .set_file_info = smb2_set_file_info, 5095 .set_compression = smb2_set_compression, 5096 .mkdir = smb2_mkdir, 5097 .mkdir_setinfo = smb2_mkdir_setinfo, 5098 .rmdir = smb2_rmdir, 5099 .unlink = smb2_unlink, 5100 .rename = smb2_rename_path, 5101 .create_hardlink = smb2_create_hardlink, 5102 .parse_reparse_point = smb2_parse_reparse_point, 5103 .query_mf_symlink = smb3_query_mf_symlink, 5104 .create_mf_symlink = smb3_create_mf_symlink, 5105 .create_reparse_symlink = smb2_create_reparse_symlink, 5106 .open = smb2_open_file, 5107 .set_fid = smb2_set_fid, 5108 .close = smb2_close_file, 5109 .flush = smb2_flush_file, 5110 .async_readv = smb2_async_readv, 5111 .async_writev = smb2_async_writev, 5112 .sync_read = smb2_sync_read, 5113 .sync_write = smb2_sync_write, 5114 .query_dir_first = smb2_query_dir_first, 5115 .query_dir_next = smb2_query_dir_next, 5116 .close_dir = smb2_close_dir, 5117 .calc_smb_size = smb2_calc_size, 5118 .is_status_pending = smb2_is_status_pending, 5119 .is_session_expired = smb2_is_session_expired, 5120 .oplock_response = smb2_oplock_response, 5121 .queryfs = smb2_queryfs, 5122 .mand_lock = smb2_mand_lock, 5123 .mand_unlock_range = smb2_unlock_range, 5124 .push_mand_locks = smb2_push_mandatory_locks, 5125 .get_lease_key = smb2_get_lease_key, 5126 .set_lease_key = smb2_set_lease_key, 5127 .new_lease_key = smb2_new_lease_key, 5128 .calc_signature = smb2_calc_signature, 5129 .is_read_op = smb2_is_read_op, 5130 .set_oplock_level = smb2_set_oplock_level, 5131 .create_lease_buf = smb2_create_lease_buf, 5132 .parse_lease_buf = smb2_parse_lease_buf, 5133 .copychunk_range = smb2_copychunk_range, 5134 .wp_retry_size = smb2_wp_retry_size, 5135 .dir_needs_close = smb2_dir_needs_close, 5136 .get_dfs_refer = smb2_get_dfs_refer, 5137 .select_sectype = smb2_select_sectype, 5138 #ifdef CONFIG_CIFS_XATTR 5139 .query_all_EAs = smb2_query_eas, 5140 .set_EA = smb2_set_ea, 5141 #endif /* CIFS_XATTR */ 5142 .get_acl = get_smb2_acl, 5143 .get_acl_by_fid = get_smb2_acl_by_fid, 5144 .set_acl = set_smb2_acl, 5145 .next_header = smb2_next_header, 5146 .ioctl_query_info = smb2_ioctl_query_info, 5147 .make_node = smb2_make_node, 5148 .fiemap = smb3_fiemap, 5149 .llseek = smb3_llseek, 5150 .is_status_io_timeout = smb2_is_status_io_timeout, 5151 .is_network_name_deleted = smb2_is_network_name_deleted, 5152 }; 5153 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5154 5155 struct smb_version_operations smb21_operations = { 5156 .compare_fids = smb2_compare_fids, 5157 .setup_request = smb2_setup_request, 5158 .setup_async_request = smb2_setup_async_request, 5159 .check_receive = smb2_check_receive, 5160 .add_credits = smb2_add_credits, 5161 .set_credits = smb2_set_credits, 5162 .get_credits_field = smb2_get_credits_field, 5163 .get_credits = smb2_get_credits, 5164 .wait_mtu_credits = smb2_wait_mtu_credits, 5165 .adjust_credits = smb2_adjust_credits, 5166 .get_next_mid = smb2_get_next_mid, 5167 .revert_current_mid = smb2_revert_current_mid, 5168 .read_data_offset = smb2_read_data_offset, 5169 .read_data_length = smb2_read_data_length, 5170 .map_error = map_smb2_to_linux_error, 5171 .find_mid = smb2_find_mid, 5172 .check_message = smb2_check_message, 5173 .dump_detail = smb2_dump_detail, 5174 .clear_stats = smb2_clear_stats, 5175 .print_stats = smb2_print_stats, 5176 .is_oplock_break = smb2_is_valid_oplock_break, 5177 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5178 .downgrade_oplock = smb2_downgrade_oplock, 5179 .need_neg = smb2_need_neg, 5180 .negotiate = smb2_negotiate, 5181 .negotiate_wsize = smb2_negotiate_wsize, 5182 .negotiate_rsize = smb2_negotiate_rsize, 5183 .sess_setup = SMB2_sess_setup, 5184 .logoff = SMB2_logoff, 5185 .tree_connect = SMB2_tcon, 5186 .tree_disconnect = SMB2_tdis, 5187 .qfs_tcon = smb2_qfs_tcon, 5188 .is_path_accessible = smb2_is_path_accessible, 5189 .can_echo = smb2_can_echo, 5190 .echo = SMB2_echo, 5191 .query_path_info = smb2_query_path_info, 5192 .query_reparse_point = smb2_query_reparse_point, 5193 .get_srv_inum = smb2_get_srv_inum, 5194 .query_file_info = smb2_query_file_info, 5195 .set_path_size = smb2_set_path_size, 5196 .set_file_size = smb2_set_file_size, 5197 .set_file_info = smb2_set_file_info, 5198 .set_compression = smb2_set_compression, 5199 .mkdir = smb2_mkdir, 5200 .mkdir_setinfo = smb2_mkdir_setinfo, 5201 .rmdir = smb2_rmdir, 5202 .unlink = smb2_unlink, 5203 .rename = smb2_rename_path, 5204 .create_hardlink = smb2_create_hardlink, 5205 .parse_reparse_point = smb2_parse_reparse_point, 5206 .query_mf_symlink = smb3_query_mf_symlink, 5207 .create_mf_symlink = smb3_create_mf_symlink, 5208 .create_reparse_symlink = smb2_create_reparse_symlink, 5209 .open = smb2_open_file, 5210 .set_fid = smb2_set_fid, 5211 .close = smb2_close_file, 5212 .flush = smb2_flush_file, 5213 .async_readv = smb2_async_readv, 5214 .async_writev = smb2_async_writev, 5215 .sync_read = smb2_sync_read, 5216 .sync_write = smb2_sync_write, 5217 .query_dir_first = smb2_query_dir_first, 5218 .query_dir_next = smb2_query_dir_next, 5219 .close_dir = smb2_close_dir, 5220 .calc_smb_size = smb2_calc_size, 5221 .is_status_pending = smb2_is_status_pending, 5222 .is_session_expired = smb2_is_session_expired, 5223 .oplock_response = smb2_oplock_response, 5224 .queryfs = smb2_queryfs, 5225 .mand_lock = smb2_mand_lock, 5226 .mand_unlock_range = smb2_unlock_range, 5227 .push_mand_locks = smb2_push_mandatory_locks, 5228 .get_lease_key = smb2_get_lease_key, 5229 .set_lease_key = smb2_set_lease_key, 5230 .new_lease_key = smb2_new_lease_key, 5231 .calc_signature = smb2_calc_signature, 5232 .is_read_op = smb21_is_read_op, 5233 .set_oplock_level = smb21_set_oplock_level, 5234 .create_lease_buf = smb2_create_lease_buf, 5235 .parse_lease_buf = smb2_parse_lease_buf, 5236 .copychunk_range = smb2_copychunk_range, 5237 .wp_retry_size = smb2_wp_retry_size, 5238 .dir_needs_close = smb2_dir_needs_close, 5239 .enum_snapshots = smb3_enum_snapshots, 5240 .notify = smb3_notify, 5241 .get_dfs_refer = smb2_get_dfs_refer, 5242 .select_sectype = smb2_select_sectype, 5243 #ifdef CONFIG_CIFS_XATTR 5244 .query_all_EAs = smb2_query_eas, 5245 .set_EA = smb2_set_ea, 5246 #endif /* CIFS_XATTR */ 5247 .get_acl = get_smb2_acl, 5248 .get_acl_by_fid = get_smb2_acl_by_fid, 5249 .set_acl = set_smb2_acl, 5250 .next_header = smb2_next_header, 5251 .ioctl_query_info = smb2_ioctl_query_info, 5252 .make_node = smb2_make_node, 5253 .fiemap = smb3_fiemap, 5254 .llseek = smb3_llseek, 5255 .is_status_io_timeout = smb2_is_status_io_timeout, 5256 .is_network_name_deleted = smb2_is_network_name_deleted, 5257 }; 5258 5259 struct smb_version_operations smb30_operations = { 5260 .compare_fids = smb2_compare_fids, 5261 .setup_request = smb2_setup_request, 5262 .setup_async_request = smb2_setup_async_request, 5263 .check_receive = smb2_check_receive, 5264 .add_credits = smb2_add_credits, 5265 .set_credits = smb2_set_credits, 5266 .get_credits_field = smb2_get_credits_field, 5267 .get_credits = smb2_get_credits, 5268 .wait_mtu_credits = smb2_wait_mtu_credits, 5269 .adjust_credits = smb2_adjust_credits, 5270 .get_next_mid = smb2_get_next_mid, 5271 .revert_current_mid = smb2_revert_current_mid, 5272 .read_data_offset = smb2_read_data_offset, 5273 .read_data_length = smb2_read_data_length, 5274 .map_error = map_smb2_to_linux_error, 5275 .find_mid = smb2_find_mid, 5276 .check_message = smb2_check_message, 5277 .dump_detail = smb2_dump_detail, 5278 .clear_stats = smb2_clear_stats, 5279 .print_stats = smb2_print_stats, 5280 .dump_share_caps = smb2_dump_share_caps, 5281 .is_oplock_break = smb2_is_valid_oplock_break, 5282 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5283 .downgrade_oplock = smb3_downgrade_oplock, 5284 .need_neg = smb2_need_neg, 5285 .negotiate = smb2_negotiate, 5286 .negotiate_wsize = smb3_negotiate_wsize, 5287 .negotiate_rsize = smb3_negotiate_rsize, 5288 .sess_setup = SMB2_sess_setup, 5289 .logoff = SMB2_logoff, 5290 .tree_connect = SMB2_tcon, 5291 .tree_disconnect = SMB2_tdis, 5292 .qfs_tcon = smb3_qfs_tcon, 5293 .query_server_interfaces = SMB3_request_interfaces, 5294 .is_path_accessible = smb2_is_path_accessible, 5295 .can_echo = smb2_can_echo, 5296 .echo = SMB2_echo, 5297 .query_path_info = smb2_query_path_info, 5298 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5299 .query_reparse_point = smb2_query_reparse_point, 5300 .get_srv_inum = smb2_get_srv_inum, 5301 .query_file_info = smb2_query_file_info, 5302 .set_path_size = smb2_set_path_size, 5303 .set_file_size = smb2_set_file_size, 5304 .set_file_info = smb2_set_file_info, 5305 .set_compression = smb2_set_compression, 5306 .mkdir = smb2_mkdir, 5307 .mkdir_setinfo = smb2_mkdir_setinfo, 5308 .rmdir = smb2_rmdir, 5309 .unlink = smb2_unlink, 5310 .rename = smb2_rename_path, 5311 .create_hardlink = smb2_create_hardlink, 5312 .parse_reparse_point = smb2_parse_reparse_point, 5313 .query_mf_symlink = smb3_query_mf_symlink, 5314 .create_mf_symlink = smb3_create_mf_symlink, 5315 .create_reparse_symlink = smb2_create_reparse_symlink, 5316 .open = smb2_open_file, 5317 .set_fid = smb2_set_fid, 5318 .close = smb2_close_file, 5319 .close_getattr = smb2_close_getattr, 5320 .flush = smb2_flush_file, 5321 .async_readv = smb2_async_readv, 5322 .async_writev = smb2_async_writev, 5323 .sync_read = smb2_sync_read, 5324 .sync_write = smb2_sync_write, 5325 .query_dir_first = smb2_query_dir_first, 5326 .query_dir_next = smb2_query_dir_next, 5327 .close_dir = smb2_close_dir, 5328 .calc_smb_size = smb2_calc_size, 5329 .is_status_pending = smb2_is_status_pending, 5330 .is_session_expired = smb2_is_session_expired, 5331 .oplock_response = smb2_oplock_response, 5332 .queryfs = smb2_queryfs, 5333 .mand_lock = smb2_mand_lock, 5334 .mand_unlock_range = smb2_unlock_range, 5335 .push_mand_locks = smb2_push_mandatory_locks, 5336 .get_lease_key = smb2_get_lease_key, 5337 .set_lease_key = smb2_set_lease_key, 5338 .new_lease_key = smb2_new_lease_key, 5339 .generate_signingkey = generate_smb30signingkey, 5340 .calc_signature = smb3_calc_signature, 5341 .set_integrity = smb3_set_integrity, 5342 .is_read_op = smb21_is_read_op, 5343 .set_oplock_level = smb3_set_oplock_level, 5344 .create_lease_buf = smb3_create_lease_buf, 5345 .parse_lease_buf = smb3_parse_lease_buf, 5346 .copychunk_range = smb2_copychunk_range, 5347 .duplicate_extents = smb2_duplicate_extents, 5348 .validate_negotiate = smb3_validate_negotiate, 5349 .wp_retry_size = smb2_wp_retry_size, 5350 .dir_needs_close = smb2_dir_needs_close, 5351 .fallocate = smb3_fallocate, 5352 .enum_snapshots = smb3_enum_snapshots, 5353 .notify = smb3_notify, 5354 .init_transform_rq = smb3_init_transform_rq, 5355 .is_transform_hdr = smb3_is_transform_hdr, 5356 .receive_transform = smb3_receive_transform, 5357 .get_dfs_refer = smb2_get_dfs_refer, 5358 .select_sectype = smb2_select_sectype, 5359 #ifdef CONFIG_CIFS_XATTR 5360 .query_all_EAs = smb2_query_eas, 5361 .set_EA = smb2_set_ea, 5362 #endif /* CIFS_XATTR */ 5363 .get_acl = get_smb2_acl, 5364 .get_acl_by_fid = get_smb2_acl_by_fid, 5365 .set_acl = set_smb2_acl, 5366 .next_header = smb2_next_header, 5367 .ioctl_query_info = smb2_ioctl_query_info, 5368 .make_node = smb2_make_node, 5369 .fiemap = smb3_fiemap, 5370 .llseek = smb3_llseek, 5371 .is_status_io_timeout = smb2_is_status_io_timeout, 5372 .is_network_name_deleted = smb2_is_network_name_deleted, 5373 }; 5374 5375 struct smb_version_operations smb311_operations = { 5376 .compare_fids = smb2_compare_fids, 5377 .setup_request = smb2_setup_request, 5378 .setup_async_request = smb2_setup_async_request, 5379 .check_receive = smb2_check_receive, 5380 .add_credits = smb2_add_credits, 5381 .set_credits = smb2_set_credits, 5382 .get_credits_field = smb2_get_credits_field, 5383 .get_credits = smb2_get_credits, 5384 .wait_mtu_credits = smb2_wait_mtu_credits, 5385 .adjust_credits = smb2_adjust_credits, 5386 .get_next_mid = smb2_get_next_mid, 5387 .revert_current_mid = smb2_revert_current_mid, 5388 .read_data_offset = smb2_read_data_offset, 5389 .read_data_length = smb2_read_data_length, 5390 .map_error = map_smb2_to_linux_error, 5391 .find_mid = smb2_find_mid, 5392 .check_message = smb2_check_message, 5393 .dump_detail = smb2_dump_detail, 5394 .clear_stats = smb2_clear_stats, 5395 .print_stats = smb2_print_stats, 5396 .dump_share_caps = smb2_dump_share_caps, 5397 .is_oplock_break = smb2_is_valid_oplock_break, 5398 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5399 .downgrade_oplock = smb3_downgrade_oplock, 5400 .need_neg = smb2_need_neg, 5401 .negotiate = smb2_negotiate, 5402 .negotiate_wsize = smb3_negotiate_wsize, 5403 .negotiate_rsize = smb3_negotiate_rsize, 5404 .sess_setup = SMB2_sess_setup, 5405 .logoff = SMB2_logoff, 5406 .tree_connect = SMB2_tcon, 5407 .tree_disconnect = SMB2_tdis, 5408 .qfs_tcon = smb3_qfs_tcon, 5409 .query_server_interfaces = SMB3_request_interfaces, 5410 .is_path_accessible = smb2_is_path_accessible, 5411 .can_echo = smb2_can_echo, 5412 .echo = SMB2_echo, 5413 .query_path_info = smb2_query_path_info, 5414 .query_reparse_point = smb2_query_reparse_point, 5415 .get_srv_inum = smb2_get_srv_inum, 5416 .query_file_info = smb2_query_file_info, 5417 .set_path_size = smb2_set_path_size, 5418 .set_file_size = smb2_set_file_size, 5419 .set_file_info = smb2_set_file_info, 5420 .set_compression = smb2_set_compression, 5421 .mkdir = smb2_mkdir, 5422 .mkdir_setinfo = smb2_mkdir_setinfo, 5423 .posix_mkdir = smb311_posix_mkdir, 5424 .rmdir = smb2_rmdir, 5425 .unlink = smb2_unlink, 5426 .rename = smb2_rename_path, 5427 .create_hardlink = smb2_create_hardlink, 5428 .parse_reparse_point = smb2_parse_reparse_point, 5429 .query_mf_symlink = smb3_query_mf_symlink, 5430 .create_mf_symlink = smb3_create_mf_symlink, 5431 .create_reparse_symlink = smb2_create_reparse_symlink, 5432 .open = smb2_open_file, 5433 .set_fid = smb2_set_fid, 5434 .close = smb2_close_file, 5435 .close_getattr = smb2_close_getattr, 5436 .flush = smb2_flush_file, 5437 .async_readv = smb2_async_readv, 5438 .async_writev = smb2_async_writev, 5439 .sync_read = smb2_sync_read, 5440 .sync_write = smb2_sync_write, 5441 .query_dir_first = smb2_query_dir_first, 5442 .query_dir_next = smb2_query_dir_next, 5443 .close_dir = smb2_close_dir, 5444 .calc_smb_size = smb2_calc_size, 5445 .is_status_pending = smb2_is_status_pending, 5446 .is_session_expired = smb2_is_session_expired, 5447 .oplock_response = smb2_oplock_response, 5448 .queryfs = smb311_queryfs, 5449 .mand_lock = smb2_mand_lock, 5450 .mand_unlock_range = smb2_unlock_range, 5451 .push_mand_locks = smb2_push_mandatory_locks, 5452 .get_lease_key = smb2_get_lease_key, 5453 .set_lease_key = smb2_set_lease_key, 5454 .new_lease_key = smb2_new_lease_key, 5455 .generate_signingkey = generate_smb311signingkey, 5456 .calc_signature = smb3_calc_signature, 5457 .set_integrity = smb3_set_integrity, 5458 .is_read_op = smb21_is_read_op, 5459 .set_oplock_level = smb3_set_oplock_level, 5460 .create_lease_buf = smb3_create_lease_buf, 5461 .parse_lease_buf = smb3_parse_lease_buf, 5462 .copychunk_range = smb2_copychunk_range, 5463 .duplicate_extents = smb2_duplicate_extents, 5464 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5465 .wp_retry_size = smb2_wp_retry_size, 5466 .dir_needs_close = smb2_dir_needs_close, 5467 .fallocate = smb3_fallocate, 5468 .enum_snapshots = smb3_enum_snapshots, 5469 .notify = smb3_notify, 5470 .init_transform_rq = smb3_init_transform_rq, 5471 .is_transform_hdr = smb3_is_transform_hdr, 5472 .receive_transform = smb3_receive_transform, 5473 .get_dfs_refer = smb2_get_dfs_refer, 5474 .select_sectype = smb2_select_sectype, 5475 #ifdef CONFIG_CIFS_XATTR 5476 .query_all_EAs = smb2_query_eas, 5477 .set_EA = smb2_set_ea, 5478 #endif /* CIFS_XATTR */ 5479 .get_acl = get_smb2_acl, 5480 .get_acl_by_fid = get_smb2_acl_by_fid, 5481 .set_acl = set_smb2_acl, 5482 .next_header = smb2_next_header, 5483 .ioctl_query_info = smb2_ioctl_query_info, 5484 .make_node = smb2_make_node, 5485 .fiemap = smb3_fiemap, 5486 .llseek = smb3_llseek, 5487 .is_status_io_timeout = smb2_is_status_io_timeout, 5488 .is_network_name_deleted = smb2_is_network_name_deleted, 5489 }; 5490 5491 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5492 struct smb_version_values smb20_values = { 5493 .version_string = SMB20_VERSION_STRING, 5494 .protocol_id = SMB20_PROT_ID, 5495 .req_capabilities = 0, /* MBZ */ 5496 .large_lock_type = 0, 5497 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5498 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5499 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5500 .header_size = sizeof(struct smb2_hdr), 5501 .header_preamble_size = 0, 5502 .max_header_size = MAX_SMB2_HDR_SIZE, 5503 .read_rsp_size = sizeof(struct smb2_read_rsp), 5504 .lock_cmd = SMB2_LOCK, 5505 .cap_unix = 0, 5506 .cap_nt_find = SMB2_NT_FIND, 5507 .cap_large_files = SMB2_LARGE_FILES, 5508 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5509 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5510 .create_lease_size = sizeof(struct create_lease), 5511 }; 5512 #endif /* ALLOW_INSECURE_LEGACY */ 5513 5514 struct smb_version_values smb21_values = { 5515 .version_string = SMB21_VERSION_STRING, 5516 .protocol_id = SMB21_PROT_ID, 5517 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5518 .large_lock_type = 0, 5519 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5520 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5521 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5522 .header_size = sizeof(struct smb2_hdr), 5523 .header_preamble_size = 0, 5524 .max_header_size = MAX_SMB2_HDR_SIZE, 5525 .read_rsp_size = sizeof(struct smb2_read_rsp), 5526 .lock_cmd = SMB2_LOCK, 5527 .cap_unix = 0, 5528 .cap_nt_find = SMB2_NT_FIND, 5529 .cap_large_files = SMB2_LARGE_FILES, 5530 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5531 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5532 .create_lease_size = sizeof(struct create_lease), 5533 }; 5534 5535 struct smb_version_values smb3any_values = { 5536 .version_string = SMB3ANY_VERSION_STRING, 5537 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5538 .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, 5539 .large_lock_type = 0, 5540 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5541 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5542 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5543 .header_size = sizeof(struct smb2_hdr), 5544 .header_preamble_size = 0, 5545 .max_header_size = MAX_SMB2_HDR_SIZE, 5546 .read_rsp_size = sizeof(struct smb2_read_rsp), 5547 .lock_cmd = SMB2_LOCK, 5548 .cap_unix = 0, 5549 .cap_nt_find = SMB2_NT_FIND, 5550 .cap_large_files = SMB2_LARGE_FILES, 5551 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5552 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5553 .create_lease_size = sizeof(struct create_lease_v2), 5554 }; 5555 5556 struct smb_version_values smbdefault_values = { 5557 .version_string = SMBDEFAULT_VERSION_STRING, 5558 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5559 .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, 5560 .large_lock_type = 0, 5561 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5562 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5563 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5564 .header_size = sizeof(struct smb2_hdr), 5565 .header_preamble_size = 0, 5566 .max_header_size = MAX_SMB2_HDR_SIZE, 5567 .read_rsp_size = sizeof(struct smb2_read_rsp), 5568 .lock_cmd = SMB2_LOCK, 5569 .cap_unix = 0, 5570 .cap_nt_find = SMB2_NT_FIND, 5571 .cap_large_files = SMB2_LARGE_FILES, 5572 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5573 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5574 .create_lease_size = sizeof(struct create_lease_v2), 5575 }; 5576 5577 struct smb_version_values smb30_values = { 5578 .version_string = SMB30_VERSION_STRING, 5579 .protocol_id = SMB30_PROT_ID, 5580 .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, 5581 .large_lock_type = 0, 5582 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5583 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5584 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5585 .header_size = sizeof(struct smb2_hdr), 5586 .header_preamble_size = 0, 5587 .max_header_size = MAX_SMB2_HDR_SIZE, 5588 .read_rsp_size = sizeof(struct smb2_read_rsp), 5589 .lock_cmd = SMB2_LOCK, 5590 .cap_unix = 0, 5591 .cap_nt_find = SMB2_NT_FIND, 5592 .cap_large_files = SMB2_LARGE_FILES, 5593 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5594 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5595 .create_lease_size = sizeof(struct create_lease_v2), 5596 }; 5597 5598 struct smb_version_values smb302_values = { 5599 .version_string = SMB302_VERSION_STRING, 5600 .protocol_id = SMB302_PROT_ID, 5601 .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, 5602 .large_lock_type = 0, 5603 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5604 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5605 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5606 .header_size = sizeof(struct smb2_hdr), 5607 .header_preamble_size = 0, 5608 .max_header_size = MAX_SMB2_HDR_SIZE, 5609 .read_rsp_size = sizeof(struct smb2_read_rsp), 5610 .lock_cmd = SMB2_LOCK, 5611 .cap_unix = 0, 5612 .cap_nt_find = SMB2_NT_FIND, 5613 .cap_large_files = SMB2_LARGE_FILES, 5614 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5615 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5616 .create_lease_size = sizeof(struct create_lease_v2), 5617 }; 5618 5619 struct smb_version_values smb311_values = { 5620 .version_string = SMB311_VERSION_STRING, 5621 .protocol_id = SMB311_PROT_ID, 5622 .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, 5623 .large_lock_type = 0, 5624 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5625 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5626 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5627 .header_size = sizeof(struct smb2_hdr), 5628 .header_preamble_size = 0, 5629 .max_header_size = MAX_SMB2_HDR_SIZE, 5630 .read_rsp_size = sizeof(struct smb2_read_rsp), 5631 .lock_cmd = SMB2_LOCK, 5632 .cap_unix = 0, 5633 .cap_nt_find = SMB2_NT_FIND, 5634 .cap_large_files = SMB2_LARGE_FILES, 5635 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5636 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5637 .create_lease_size = sizeof(struct create_lease_v2), 5638 }; 5639