1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <uapi/linux/magic.h> 17 #include "cifsfs.h" 18 #include "cifsglob.h" 19 #include "smb2pdu.h" 20 #include "smb2proto.h" 21 #include "cifsproto.h" 22 #include "cifs_debug.h" 23 #include "cifs_unicode.h" 24 #include "smb2status.h" 25 #include "smb2glob.h" 26 #include "cifs_ioctl.h" 27 #include "smbdirect.h" 28 #include "fscache.h" 29 #include "fs_context.h" 30 #include "cached_dir.h" 31 32 /* Change credits for different ops and return the total number of credits */ 33 static int 34 change_conf(struct TCP_Server_Info *server) 35 { 36 server->credits += server->echo_credits + server->oplock_credits; 37 if (server->credits > server->max_credits) 38 server->credits = server->max_credits; 39 server->oplock_credits = server->echo_credits = 0; 40 switch (server->credits) { 41 case 0: 42 return 0; 43 case 1: 44 server->echoes = false; 45 server->oplocks = false; 46 break; 47 case 2: 48 server->echoes = true; 49 server->oplocks = false; 50 server->echo_credits = 1; 51 break; 52 default: 53 server->echoes = true; 54 if (enable_oplocks) { 55 server->oplocks = true; 56 server->oplock_credits = 1; 57 } else 58 server->oplocks = false; 59 60 server->echo_credits = 1; 61 } 62 server->credits -= server->echo_credits + server->oplock_credits; 63 return server->credits + server->echo_credits + server->oplock_credits; 64 } 65 66 static void 67 smb2_add_credits(struct TCP_Server_Info *server, 68 const struct cifs_credits *credits, const int optype) 69 { 70 int *val, rc = -1; 71 int scredits, in_flight; 72 unsigned int add = credits->value; 73 unsigned int instance = credits->instance; 74 bool reconnect_detected = false; 75 bool reconnect_with_invalid_credits = false; 76 77 spin_lock(&server->req_lock); 78 val = server->ops->get_credits_field(server, optype); 79 80 /* eg found case where write overlapping reconnect messed up credits */ 81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 82 reconnect_with_invalid_credits = true; 83 84 if ((instance == 0) || (instance == server->reconnect_instance)) 85 *val += add; 86 else 87 reconnect_detected = true; 88 89 if (*val > 65000) { 90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 91 pr_warn_once("server overflowed SMB3 credits\n"); 92 trace_smb3_overflow_credits(server->CurrentMid, 93 server->conn_id, server->hostname, *val, 94 add, server->in_flight); 95 } 96 WARN_ON_ONCE(server->in_flight == 0); 97 server->in_flight--; 98 if (server->in_flight == 0 && 99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 101 rc = change_conf(server); 102 /* 103 * Sometimes server returns 0 credits on oplock break ack - we need to 104 * rebalance credits in this case. 105 */ 106 else if (server->in_flight > 0 && server->oplock_credits == 0 && 107 server->oplocks) { 108 if (server->credits > 1) { 109 server->credits--; 110 server->oplock_credits++; 111 } 112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 114 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 115 change_conf(server); 116 117 scredits = *val; 118 in_flight = server->in_flight; 119 spin_unlock(&server->req_lock); 120 wake_up(&server->request_q); 121 122 if (reconnect_detected) { 123 trace_smb3_reconnect_detected(server->CurrentMid, 124 server->conn_id, server->hostname, scredits, add, in_flight); 125 126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 127 add, instance); 128 } 129 130 if (reconnect_with_invalid_credits) { 131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 132 server->conn_id, server->hostname, scredits, add, in_flight); 133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 134 optype, scredits, add); 135 } 136 137 spin_lock(&server->srv_lock); 138 if (server->tcpStatus == CifsNeedReconnect 139 || server->tcpStatus == CifsExiting) { 140 spin_unlock(&server->srv_lock); 141 return; 142 } 143 spin_unlock(&server->srv_lock); 144 145 switch (rc) { 146 case -1: 147 /* change_conf hasn't been executed */ 148 break; 149 case 0: 150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 151 break; 152 case 1: 153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 154 break; 155 case 2: 156 cifs_dbg(FYI, "disabling oplocks\n"); 157 break; 158 default: 159 /* change_conf rebalanced credits for different types */ 160 break; 161 } 162 163 trace_smb3_add_credits(server->CurrentMid, 164 server->conn_id, server->hostname, scredits, add, in_flight); 165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 166 } 167 168 static void 169 smb2_set_credits(struct TCP_Server_Info *server, const int val) 170 { 171 int scredits, in_flight; 172 173 spin_lock(&server->req_lock); 174 server->credits = val; 175 if (val == 1) { 176 server->reconnect_instance++; 177 /* 178 * ChannelSequence updated for all channels in primary channel so that consistent 179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 180 */ 181 if (SERVER_IS_CHAN(server)) 182 server->primary_server->channel_sequence_num++; 183 else 184 server->channel_sequence_num++; 185 } 186 scredits = server->credits; 187 in_flight = server->in_flight; 188 spin_unlock(&server->req_lock); 189 190 trace_smb3_set_credits(server->CurrentMid, 191 server->conn_id, server->hostname, scredits, val, in_flight); 192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 193 194 /* don't log while holding the lock */ 195 if (val == 1) 196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 197 } 198 199 static int * 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 201 { 202 switch (optype) { 203 case CIFS_ECHO_OP: 204 return &server->echo_credits; 205 case CIFS_OBREAK_OP: 206 return &server->oplock_credits; 207 default: 208 return &server->credits; 209 } 210 } 211 212 static unsigned int 213 smb2_get_credits(struct mid_q_entry *mid) 214 { 215 return mid->credits_received; 216 } 217 218 static int 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 220 unsigned int *num, struct cifs_credits *credits) 221 { 222 int rc = 0; 223 unsigned int scredits, in_flight; 224 225 spin_lock(&server->req_lock); 226 while (1) { 227 spin_unlock(&server->req_lock); 228 229 spin_lock(&server->srv_lock); 230 if (server->tcpStatus == CifsExiting) { 231 spin_unlock(&server->srv_lock); 232 return -ENOENT; 233 } 234 spin_unlock(&server->srv_lock); 235 236 spin_lock(&server->req_lock); 237 if (server->credits <= 0) { 238 spin_unlock(&server->req_lock); 239 cifs_num_waiters_inc(server); 240 rc = wait_event_killable(server->request_q, 241 has_credits(server, &server->credits, 1)); 242 cifs_num_waiters_dec(server); 243 if (rc) 244 return rc; 245 spin_lock(&server->req_lock); 246 } else { 247 scredits = server->credits; 248 /* can deadlock with reopen */ 249 if (scredits <= 8) { 250 *num = SMB2_MAX_BUFFER_SIZE; 251 credits->value = 0; 252 credits->instance = 0; 253 break; 254 } 255 256 /* leave some credits for reopen and other ops */ 257 scredits -= 8; 258 *num = min_t(unsigned int, size, 259 scredits * SMB2_MAX_BUFFER_SIZE); 260 261 credits->value = 262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 263 credits->instance = server->reconnect_instance; 264 server->credits -= credits->value; 265 server->in_flight++; 266 if (server->in_flight > server->max_in_flight) 267 server->max_in_flight = server->in_flight; 268 break; 269 } 270 } 271 scredits = server->credits; 272 in_flight = server->in_flight; 273 spin_unlock(&server->req_lock); 274 275 trace_smb3_wait_credits(server->CurrentMid, 276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 278 __func__, credits->value, scredits); 279 280 return rc; 281 } 282 283 static int 284 smb2_adjust_credits(struct TCP_Server_Info *server, 285 struct cifs_credits *credits, 286 const unsigned int payload_size) 287 { 288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 289 int scredits, in_flight; 290 291 if (!credits->value || credits->value == new_val) 292 return 0; 293 294 if (credits->value < new_val) { 295 trace_smb3_too_many_credits(server->CurrentMid, 296 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 298 credits->value, new_val); 299 300 return -EOPNOTSUPP; 301 } 302 303 spin_lock(&server->req_lock); 304 305 if (server->reconnect_instance != credits->instance) { 306 scredits = server->credits; 307 in_flight = server->in_flight; 308 spin_unlock(&server->req_lock); 309 310 trace_smb3_reconnect_detected(server->CurrentMid, 311 server->conn_id, server->hostname, scredits, 312 credits->value - new_val, in_flight); 313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 314 credits->value - new_val); 315 return -EAGAIN; 316 } 317 318 server->credits += credits->value - new_val; 319 scredits = server->credits; 320 in_flight = server->in_flight; 321 spin_unlock(&server->req_lock); 322 wake_up(&server->request_q); 323 324 trace_smb3_adj_credits(server->CurrentMid, 325 server->conn_id, server->hostname, scredits, 326 credits->value - new_val, in_flight); 327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 328 __func__, credits->value - new_val, scredits); 329 330 credits->value = new_val; 331 332 return 0; 333 } 334 335 static __u64 336 smb2_get_next_mid(struct TCP_Server_Info *server) 337 { 338 __u64 mid; 339 /* for SMB2 we need the current value */ 340 spin_lock(&server->mid_lock); 341 mid = server->CurrentMid++; 342 spin_unlock(&server->mid_lock); 343 return mid; 344 } 345 346 static void 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 348 { 349 spin_lock(&server->mid_lock); 350 if (server->CurrentMid >= val) 351 server->CurrentMid -= val; 352 spin_unlock(&server->mid_lock); 353 } 354 355 static struct mid_q_entry * 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 357 { 358 struct mid_q_entry *mid; 359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 360 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 361 362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 364 return NULL; 365 } 366 367 spin_lock(&server->mid_lock); 368 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 369 if ((mid->mid == wire_mid) && 370 (mid->mid_state == MID_REQUEST_SUBMITTED) && 371 (mid->command == shdr->Command)) { 372 kref_get(&mid->refcount); 373 if (dequeue) { 374 list_del_init(&mid->qhead); 375 mid->mid_flags |= MID_DELETED; 376 } 377 spin_unlock(&server->mid_lock); 378 return mid; 379 } 380 } 381 spin_unlock(&server->mid_lock); 382 return NULL; 383 } 384 385 static struct mid_q_entry * 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 387 { 388 return __smb2_find_mid(server, buf, false); 389 } 390 391 static struct mid_q_entry * 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 393 { 394 return __smb2_find_mid(server, buf, true); 395 } 396 397 static void 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 399 { 400 #ifdef CONFIG_CIFS_DEBUG2 401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 402 403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 405 shdr->Id.SyncId.ProcessId); 406 if (!server->ops->check_message(buf, server->total_read, server)) { 407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 408 server->ops->calc_smb_size(buf)); 409 } 410 #endif 411 } 412 413 static bool 414 smb2_need_neg(struct TCP_Server_Info *server) 415 { 416 return server->max_read == 0; 417 } 418 419 static int 420 smb2_negotiate(const unsigned int xid, 421 struct cifs_ses *ses, 422 struct TCP_Server_Info *server) 423 { 424 int rc; 425 426 spin_lock(&server->mid_lock); 427 server->CurrentMid = 0; 428 spin_unlock(&server->mid_lock); 429 rc = SMB2_negotiate(xid, ses, server); 430 /* BB we probably don't need to retry with modern servers */ 431 if (rc == -EAGAIN) 432 rc = -EHOSTDOWN; 433 return rc; 434 } 435 436 static unsigned int 437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 438 { 439 struct TCP_Server_Info *server = tcon->ses->server; 440 unsigned int wsize; 441 442 /* start with specified wsize, or default */ 443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 444 wsize = min_t(unsigned int, wsize, server->max_write); 445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 447 448 return wsize; 449 } 450 451 static unsigned int 452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 453 { 454 struct TCP_Server_Info *server = tcon->ses->server; 455 unsigned int wsize; 456 457 /* start with specified wsize, or default */ 458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 459 wsize = min_t(unsigned int, wsize, server->max_write); 460 #ifdef CONFIG_CIFS_SMB_DIRECT 461 if (server->rdma) { 462 if (server->sign) 463 /* 464 * Account for SMB2 data transfer packet header and 465 * possible encryption header 466 */ 467 wsize = min_t(unsigned int, 468 wsize, 469 server->smbd_conn->max_fragmented_send_size - 470 SMB2_READWRITE_PDU_HEADER_SIZE - 471 sizeof(struct smb2_transform_hdr)); 472 else 473 wsize = min_t(unsigned int, 474 wsize, server->smbd_conn->max_readwrite_size); 475 } 476 #endif 477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 479 480 return wsize; 481 } 482 483 static unsigned int 484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 485 { 486 struct TCP_Server_Info *server = tcon->ses->server; 487 unsigned int rsize; 488 489 /* start with specified rsize, or default */ 490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 491 rsize = min_t(unsigned int, rsize, server->max_read); 492 493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 495 496 return rsize; 497 } 498 499 static unsigned int 500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 501 { 502 struct TCP_Server_Info *server = tcon->ses->server; 503 unsigned int rsize; 504 505 /* start with specified rsize, or default */ 506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 507 rsize = min_t(unsigned int, rsize, server->max_read); 508 #ifdef CONFIG_CIFS_SMB_DIRECT 509 if (server->rdma) { 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 rsize = min_t(unsigned int, 516 rsize, 517 server->smbd_conn->max_fragmented_recv_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 rsize = min_t(unsigned int, 522 rsize, server->smbd_conn->max_readwrite_size); 523 } 524 #endif 525 526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 528 529 return rsize; 530 } 531 532 /* 533 * compare two interfaces a and b 534 * return 0 if everything matches. 535 * return 1 if a is rdma capable, or rss capable, or has higher link speed 536 * return -1 otherwise. 537 */ 538 static int 539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 540 { 541 int cmp_ret = 0; 542 543 WARN_ON(!a || !b); 544 if (a->rdma_capable == b->rdma_capable) { 545 if (a->rss_capable == b->rss_capable) { 546 if (a->speed == b->speed) { 547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 548 (struct sockaddr *) &b->sockaddr); 549 if (!cmp_ret) 550 return 0; 551 else if (cmp_ret > 0) 552 return 1; 553 else 554 return -1; 555 } else if (a->speed > b->speed) 556 return 1; 557 else 558 return -1; 559 } else if (a->rss_capable > b->rss_capable) 560 return 1; 561 else 562 return -1; 563 } else if (a->rdma_capable > b->rdma_capable) 564 return 1; 565 else 566 return -1; 567 } 568 569 static int 570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 571 size_t buf_len, struct cifs_ses *ses, bool in_mount) 572 { 573 struct network_interface_info_ioctl_rsp *p; 574 struct sockaddr_in *addr4; 575 struct sockaddr_in6 *addr6; 576 struct iface_info_ipv4 *p4; 577 struct iface_info_ipv6 *p6; 578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 579 struct cifs_server_iface tmp_iface; 580 ssize_t bytes_left; 581 size_t next = 0; 582 int nb_iface = 0; 583 int rc = 0, ret = 0; 584 585 bytes_left = buf_len; 586 p = buf; 587 588 spin_lock(&ses->iface_lock); 589 /* do not query too frequently, this time with lock held */ 590 if (ses->iface_last_update && 591 time_before(jiffies, ses->iface_last_update + 592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 593 spin_unlock(&ses->iface_lock); 594 return 0; 595 } 596 597 /* 598 * Go through iface_list and mark them as inactive 599 */ 600 list_for_each_entry_safe(iface, niface, &ses->iface_list, 601 iface_head) 602 iface->is_active = 0; 603 604 spin_unlock(&ses->iface_lock); 605 606 /* 607 * Samba server e.g. can return an empty interface list in some cases, 608 * which would only be a problem if we were requesting multichannel 609 */ 610 if (bytes_left == 0) { 611 /* avoid spamming logs every 10 minutes, so log only in mount */ 612 if ((ses->chan_max > 1) && in_mount) 613 cifs_dbg(VFS, 614 "multichannel not available\n" 615 "Empty network interface list returned by server %s\n", 616 ses->server->hostname); 617 rc = -EOPNOTSUPP; 618 ses->iface_last_update = jiffies; 619 goto out; 620 } 621 622 while (bytes_left >= (ssize_t)sizeof(*p)) { 623 memset(&tmp_iface, 0, sizeof(tmp_iface)); 624 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 625 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 626 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 627 628 switch (p->Family) { 629 /* 630 * The kernel and wire socket structures have the same 631 * layout and use network byte order but make the 632 * conversion explicit in case either one changes. 633 */ 634 case INTERNETWORK: 635 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 636 p4 = (struct iface_info_ipv4 *)p->Buffer; 637 addr4->sin_family = AF_INET; 638 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 639 640 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 641 addr4->sin_port = cpu_to_be16(CIFS_PORT); 642 643 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 644 &addr4->sin_addr); 645 break; 646 case INTERNETWORKV6: 647 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 648 p6 = (struct iface_info_ipv6 *)p->Buffer; 649 addr6->sin6_family = AF_INET6; 650 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 651 652 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 653 addr6->sin6_flowinfo = 0; 654 addr6->sin6_scope_id = 0; 655 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 656 657 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 658 &addr6->sin6_addr); 659 break; 660 default: 661 cifs_dbg(VFS, 662 "%s: skipping unsupported socket family\n", 663 __func__); 664 goto next_iface; 665 } 666 667 /* 668 * The iface_list is assumed to be sorted by speed. 669 * Check if the new interface exists in that list. 670 * NEVER change iface. it could be in use. 671 * Add a new one instead 672 */ 673 spin_lock(&ses->iface_lock); 674 list_for_each_entry_safe(iface, niface, &ses->iface_list, 675 iface_head) { 676 ret = iface_cmp(iface, &tmp_iface); 677 if (!ret) { 678 iface->is_active = 1; 679 spin_unlock(&ses->iface_lock); 680 goto next_iface; 681 } else if (ret < 0) { 682 /* all remaining ifaces are slower */ 683 kref_get(&iface->refcount); 684 break; 685 } 686 } 687 spin_unlock(&ses->iface_lock); 688 689 /* no match. insert the entry in the list */ 690 info = kmalloc(sizeof(struct cifs_server_iface), 691 GFP_KERNEL); 692 if (!info) { 693 rc = -ENOMEM; 694 goto out; 695 } 696 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 697 698 /* add this new entry to the list */ 699 kref_init(&info->refcount); 700 info->is_active = 1; 701 702 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 703 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 704 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 705 le32_to_cpu(p->Capability)); 706 707 spin_lock(&ses->iface_lock); 708 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 709 list_add_tail(&info->iface_head, &iface->iface_head); 710 kref_put(&iface->refcount, release_iface); 711 } else 712 list_add_tail(&info->iface_head, &ses->iface_list); 713 714 ses->iface_count++; 715 spin_unlock(&ses->iface_lock); 716 next_iface: 717 nb_iface++; 718 next = le32_to_cpu(p->Next); 719 if (!next) { 720 bytes_left -= sizeof(*p); 721 break; 722 } 723 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 724 bytes_left -= next; 725 } 726 727 if (!nb_iface) { 728 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 729 rc = -EINVAL; 730 goto out; 731 } 732 733 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 734 if ((bytes_left > 8) || p->Next) 735 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 736 737 ses->iface_last_update = jiffies; 738 739 out: 740 /* 741 * Go through the list again and put the inactive entries 742 */ 743 spin_lock(&ses->iface_lock); 744 list_for_each_entry_safe(iface, niface, &ses->iface_list, 745 iface_head) { 746 if (!iface->is_active) { 747 list_del(&iface->iface_head); 748 kref_put(&iface->refcount, release_iface); 749 ses->iface_count--; 750 } 751 } 752 spin_unlock(&ses->iface_lock); 753 754 return rc; 755 } 756 757 int 758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 759 { 760 int rc; 761 unsigned int ret_data_len = 0; 762 struct network_interface_info_ioctl_rsp *out_buf = NULL; 763 struct cifs_ses *ses = tcon->ses; 764 struct TCP_Server_Info *pserver; 765 766 /* do not query too frequently */ 767 if (ses->iface_last_update && 768 time_before(jiffies, ses->iface_last_update + 769 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 770 return 0; 771 772 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 773 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 774 NULL /* no data input */, 0 /* no data input */, 775 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 776 if (rc == -EOPNOTSUPP) { 777 cifs_dbg(FYI, 778 "server does not support query network interfaces\n"); 779 ret_data_len = 0; 780 } else if (rc != 0) { 781 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 782 goto out; 783 } 784 785 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 786 if (rc) 787 goto out; 788 789 /* check if iface is still active */ 790 spin_lock(&ses->chan_lock); 791 pserver = ses->chans[0].server; 792 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 793 spin_unlock(&ses->chan_lock); 794 cifs_chan_update_iface(ses, pserver); 795 spin_lock(&ses->chan_lock); 796 } 797 spin_unlock(&ses->chan_lock); 798 799 out: 800 kfree(out_buf); 801 return rc; 802 } 803 804 static void 805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 806 struct cifs_sb_info *cifs_sb) 807 { 808 int rc; 809 __le16 srch_path = 0; /* Null - open root of share */ 810 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 811 struct cifs_open_parms oparms; 812 struct cifs_fid fid; 813 struct cached_fid *cfid = NULL; 814 815 oparms = (struct cifs_open_parms) { 816 .tcon = tcon, 817 .path = "", 818 .desired_access = FILE_READ_ATTRIBUTES, 819 .disposition = FILE_OPEN, 820 .create_options = cifs_create_options(cifs_sb, 0), 821 .fid = &fid, 822 }; 823 824 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 825 if (rc == 0) 826 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 827 else 828 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 829 NULL, NULL); 830 if (rc) 831 return; 832 833 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 834 835 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 836 FS_ATTRIBUTE_INFORMATION); 837 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 838 FS_DEVICE_INFORMATION); 839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 840 FS_VOLUME_INFORMATION); 841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 842 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 843 if (cfid == NULL) 844 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 845 else 846 close_cached_dir(cfid); 847 } 848 849 static void 850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 851 struct cifs_sb_info *cifs_sb) 852 { 853 int rc; 854 __le16 srch_path = 0; /* Null - open root of share */ 855 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 856 struct cifs_open_parms oparms; 857 struct cifs_fid fid; 858 859 oparms = (struct cifs_open_parms) { 860 .tcon = tcon, 861 .path = "", 862 .desired_access = FILE_READ_ATTRIBUTES, 863 .disposition = FILE_OPEN, 864 .create_options = cifs_create_options(cifs_sb, 0), 865 .fid = &fid, 866 }; 867 868 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 869 NULL, NULL); 870 if (rc) 871 return; 872 873 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 874 FS_ATTRIBUTE_INFORMATION); 875 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 876 FS_DEVICE_INFORMATION); 877 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 878 } 879 880 static int 881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 882 struct cifs_sb_info *cifs_sb, const char *full_path) 883 { 884 __le16 *utf16_path; 885 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 886 int err_buftype = CIFS_NO_BUFFER; 887 struct cifs_open_parms oparms; 888 struct kvec err_iov = {}; 889 struct cifs_fid fid; 890 struct cached_fid *cfid; 891 bool islink; 892 int rc, rc2; 893 894 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 895 if (!rc) { 896 if (cfid->has_lease) { 897 close_cached_dir(cfid); 898 return 0; 899 } 900 close_cached_dir(cfid); 901 } 902 903 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 904 if (!utf16_path) 905 return -ENOMEM; 906 907 oparms = (struct cifs_open_parms) { 908 .tcon = tcon, 909 .path = full_path, 910 .desired_access = FILE_READ_ATTRIBUTES, 911 .disposition = FILE_OPEN, 912 .create_options = cifs_create_options(cifs_sb, 0), 913 .fid = &fid, 914 }; 915 916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 917 &err_iov, &err_buftype); 918 if (rc) { 919 struct smb2_hdr *hdr = err_iov.iov_base; 920 921 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 922 goto out; 923 924 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 925 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 926 full_path, &islink); 927 if (rc2) { 928 rc = rc2; 929 goto out; 930 } 931 if (islink) 932 rc = -EREMOTE; 933 } 934 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 935 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 936 rc = -EOPNOTSUPP; 937 goto out; 938 } 939 940 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 941 942 out: 943 free_rsp_buf(err_buftype, err_iov.iov_base); 944 kfree(utf16_path); 945 return rc; 946 } 947 948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 949 struct cifs_sb_info *cifs_sb, const char *full_path, 950 u64 *uniqueid, struct cifs_open_info_data *data) 951 { 952 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 953 return 0; 954 } 955 956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 957 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 958 { 959 struct cifs_fid *fid = &cfile->fid; 960 961 if (cfile->symlink_target) { 962 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 963 if (!data->symlink_target) 964 return -ENOMEM; 965 } 966 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 967 } 968 969 #ifdef CONFIG_CIFS_XATTR 970 static ssize_t 971 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 972 struct smb2_file_full_ea_info *src, size_t src_size, 973 const unsigned char *ea_name) 974 { 975 int rc = 0; 976 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 977 char *name, *value; 978 size_t buf_size = dst_size; 979 size_t name_len, value_len, user_name_len; 980 981 while (src_size > 0) { 982 name_len = (size_t)src->ea_name_length; 983 value_len = (size_t)le16_to_cpu(src->ea_value_length); 984 985 if (name_len == 0) 986 break; 987 988 if (src_size < 8 + name_len + 1 + value_len) { 989 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 990 rc = -EIO; 991 goto out; 992 } 993 994 name = &src->ea_data[0]; 995 value = &src->ea_data[src->ea_name_length + 1]; 996 997 if (ea_name) { 998 if (ea_name_len == name_len && 999 memcmp(ea_name, name, name_len) == 0) { 1000 rc = value_len; 1001 if (dst_size == 0) 1002 goto out; 1003 if (dst_size < value_len) { 1004 rc = -ERANGE; 1005 goto out; 1006 } 1007 memcpy(dst, value, value_len); 1008 goto out; 1009 } 1010 } else { 1011 /* 'user.' plus a terminating null */ 1012 user_name_len = 5 + 1 + name_len; 1013 1014 if (buf_size == 0) { 1015 /* skip copy - calc size only */ 1016 rc += user_name_len; 1017 } else if (dst_size >= user_name_len) { 1018 dst_size -= user_name_len; 1019 memcpy(dst, "user.", 5); 1020 dst += 5; 1021 memcpy(dst, src->ea_data, name_len); 1022 dst += name_len; 1023 *dst = 0; 1024 ++dst; 1025 rc += user_name_len; 1026 } else { 1027 /* stop before overrun buffer */ 1028 rc = -ERANGE; 1029 break; 1030 } 1031 } 1032 1033 if (!src->next_entry_offset) 1034 break; 1035 1036 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1037 /* stop before overrun buffer */ 1038 rc = -ERANGE; 1039 break; 1040 } 1041 src_size -= le32_to_cpu(src->next_entry_offset); 1042 src = (void *)((char *)src + 1043 le32_to_cpu(src->next_entry_offset)); 1044 } 1045 1046 /* didn't find the named attribute */ 1047 if (ea_name) 1048 rc = -ENODATA; 1049 1050 out: 1051 return (ssize_t)rc; 1052 } 1053 1054 static ssize_t 1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1056 const unsigned char *path, const unsigned char *ea_name, 1057 char *ea_data, size_t buf_size, 1058 struct cifs_sb_info *cifs_sb) 1059 { 1060 int rc; 1061 struct kvec rsp_iov = {NULL, 0}; 1062 int buftype = CIFS_NO_BUFFER; 1063 struct smb2_query_info_rsp *rsp; 1064 struct smb2_file_full_ea_info *info = NULL; 1065 1066 rc = smb2_query_info_compound(xid, tcon, path, 1067 FILE_READ_EA, 1068 FILE_FULL_EA_INFORMATION, 1069 SMB2_O_INFO_FILE, 1070 CIFSMaxBufSize - 1071 MAX_SMB2_CREATE_RESPONSE_SIZE - 1072 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1073 &rsp_iov, &buftype, cifs_sb); 1074 if (rc) { 1075 /* 1076 * If ea_name is NULL (listxattr) and there are no EAs, 1077 * return 0 as it's not an error. Otherwise, the specified 1078 * ea_name was not found. 1079 */ 1080 if (!ea_name && rc == -ENODATA) 1081 rc = 0; 1082 goto qeas_exit; 1083 } 1084 1085 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1086 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1087 le32_to_cpu(rsp->OutputBufferLength), 1088 &rsp_iov, 1089 sizeof(struct smb2_file_full_ea_info)); 1090 if (rc) 1091 goto qeas_exit; 1092 1093 info = (struct smb2_file_full_ea_info *)( 1094 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1095 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1096 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1097 1098 qeas_exit: 1099 free_rsp_buf(buftype, rsp_iov.iov_base); 1100 return rc; 1101 } 1102 1103 static int 1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1105 const char *path, const char *ea_name, const void *ea_value, 1106 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1107 struct cifs_sb_info *cifs_sb) 1108 { 1109 struct smb2_compound_vars *vars; 1110 struct cifs_ses *ses = tcon->ses; 1111 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1112 struct smb_rqst *rqst; 1113 struct kvec *rsp_iov; 1114 __le16 *utf16_path = NULL; 1115 int ea_name_len = strlen(ea_name); 1116 int flags = CIFS_CP_CREATE_CLOSE_OP; 1117 int len; 1118 int resp_buftype[3]; 1119 struct cifs_open_parms oparms; 1120 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1121 struct cifs_fid fid; 1122 unsigned int size[1]; 1123 void *data[1]; 1124 struct smb2_file_full_ea_info *ea = NULL; 1125 struct smb2_query_info_rsp *rsp; 1126 int rc, used_len = 0; 1127 1128 if (smb3_encryption_required(tcon)) 1129 flags |= CIFS_TRANSFORM_REQ; 1130 1131 if (ea_name_len > 255) 1132 return -EINVAL; 1133 1134 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1135 if (!utf16_path) 1136 return -ENOMEM; 1137 1138 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1139 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1140 if (!vars) { 1141 rc = -ENOMEM; 1142 goto out_free_path; 1143 } 1144 rqst = vars->rqst; 1145 rsp_iov = vars->rsp_iov; 1146 1147 if (ses->server->ops->query_all_EAs) { 1148 if (!ea_value) { 1149 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1150 ea_name, NULL, 0, 1151 cifs_sb); 1152 if (rc == -ENODATA) 1153 goto sea_exit; 1154 } else { 1155 /* If we are adding a attribute we should first check 1156 * if there will be enough space available to store 1157 * the new EA. If not we should not add it since we 1158 * would not be able to even read the EAs back. 1159 */ 1160 rc = smb2_query_info_compound(xid, tcon, path, 1161 FILE_READ_EA, 1162 FILE_FULL_EA_INFORMATION, 1163 SMB2_O_INFO_FILE, 1164 CIFSMaxBufSize - 1165 MAX_SMB2_CREATE_RESPONSE_SIZE - 1166 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1167 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1168 if (rc == 0) { 1169 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1170 used_len = le32_to_cpu(rsp->OutputBufferLength); 1171 } 1172 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1173 resp_buftype[1] = CIFS_NO_BUFFER; 1174 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1175 rc = 0; 1176 1177 /* Use a fudge factor of 256 bytes in case we collide 1178 * with a different set_EAs command. 1179 */ 1180 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1181 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1182 used_len + ea_name_len + ea_value_len + 1) { 1183 rc = -ENOSPC; 1184 goto sea_exit; 1185 } 1186 } 1187 } 1188 1189 /* Open */ 1190 rqst[0].rq_iov = vars->open_iov; 1191 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1192 1193 oparms = (struct cifs_open_parms) { 1194 .tcon = tcon, 1195 .path = path, 1196 .desired_access = FILE_WRITE_EA, 1197 .disposition = FILE_OPEN, 1198 .create_options = cifs_create_options(cifs_sb, 0), 1199 .fid = &fid, 1200 }; 1201 1202 rc = SMB2_open_init(tcon, server, 1203 &rqst[0], &oplock, &oparms, utf16_path); 1204 if (rc) 1205 goto sea_exit; 1206 smb2_set_next_command(tcon, &rqst[0]); 1207 1208 1209 /* Set Info */ 1210 rqst[1].rq_iov = vars->si_iov; 1211 rqst[1].rq_nvec = 1; 1212 1213 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1214 ea = kzalloc(len, GFP_KERNEL); 1215 if (ea == NULL) { 1216 rc = -ENOMEM; 1217 goto sea_exit; 1218 } 1219 1220 ea->ea_name_length = ea_name_len; 1221 ea->ea_value_length = cpu_to_le16(ea_value_len); 1222 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1223 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1224 1225 size[0] = len; 1226 data[0] = ea; 1227 1228 rc = SMB2_set_info_init(tcon, server, 1229 &rqst[1], COMPOUND_FID, 1230 COMPOUND_FID, current->tgid, 1231 FILE_FULL_EA_INFORMATION, 1232 SMB2_O_INFO_FILE, 0, data, size); 1233 if (rc) 1234 goto sea_exit; 1235 smb2_set_next_command(tcon, &rqst[1]); 1236 smb2_set_related(&rqst[1]); 1237 1238 /* Close */ 1239 rqst[2].rq_iov = &vars->close_iov; 1240 rqst[2].rq_nvec = 1; 1241 rc = SMB2_close_init(tcon, server, 1242 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1243 if (rc) 1244 goto sea_exit; 1245 smb2_set_related(&rqst[2]); 1246 1247 rc = compound_send_recv(xid, ses, server, 1248 flags, 3, rqst, 1249 resp_buftype, rsp_iov); 1250 /* no need to bump num_remote_opens because handle immediately closed */ 1251 1252 sea_exit: 1253 kfree(ea); 1254 SMB2_open_free(&rqst[0]); 1255 SMB2_set_info_free(&rqst[1]); 1256 SMB2_close_free(&rqst[2]); 1257 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1258 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1259 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1260 kfree(vars); 1261 out_free_path: 1262 kfree(utf16_path); 1263 return rc; 1264 } 1265 #endif 1266 1267 static bool 1268 smb2_can_echo(struct TCP_Server_Info *server) 1269 { 1270 return server->echoes; 1271 } 1272 1273 static void 1274 smb2_clear_stats(struct cifs_tcon *tcon) 1275 { 1276 int i; 1277 1278 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1279 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1280 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1281 } 1282 } 1283 1284 static void 1285 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1286 { 1287 seq_puts(m, "\n\tShare Capabilities:"); 1288 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1289 seq_puts(m, " DFS,"); 1290 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1291 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1292 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1293 seq_puts(m, " SCALEOUT,"); 1294 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1295 seq_puts(m, " CLUSTER,"); 1296 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1297 seq_puts(m, " ASYMMETRIC,"); 1298 if (tcon->capabilities == 0) 1299 seq_puts(m, " None"); 1300 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1301 seq_puts(m, " Aligned,"); 1302 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1303 seq_puts(m, " Partition Aligned,"); 1304 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1305 seq_puts(m, " SSD,"); 1306 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1307 seq_puts(m, " TRIM-support,"); 1308 1309 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1310 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1311 if (tcon->perf_sector_size) 1312 seq_printf(m, "\tOptimal sector size: 0x%x", 1313 tcon->perf_sector_size); 1314 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1315 } 1316 1317 static void 1318 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1319 { 1320 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1321 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1322 1323 /* 1324 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1325 * totals (requests sent) since those SMBs are per-session not per tcon 1326 */ 1327 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1328 (long long)(tcon->bytes_read), 1329 (long long)(tcon->bytes_written)); 1330 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1331 atomic_read(&tcon->num_local_opens), 1332 atomic_read(&tcon->num_remote_opens)); 1333 seq_printf(m, "\nTreeConnects: %d total %d failed", 1334 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1335 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1336 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1337 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1338 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1339 seq_printf(m, "\nCreates: %d total %d failed", 1340 atomic_read(&sent[SMB2_CREATE_HE]), 1341 atomic_read(&failed[SMB2_CREATE_HE])); 1342 seq_printf(m, "\nCloses: %d total %d failed", 1343 atomic_read(&sent[SMB2_CLOSE_HE]), 1344 atomic_read(&failed[SMB2_CLOSE_HE])); 1345 seq_printf(m, "\nFlushes: %d total %d failed", 1346 atomic_read(&sent[SMB2_FLUSH_HE]), 1347 atomic_read(&failed[SMB2_FLUSH_HE])); 1348 seq_printf(m, "\nReads: %d total %d failed", 1349 atomic_read(&sent[SMB2_READ_HE]), 1350 atomic_read(&failed[SMB2_READ_HE])); 1351 seq_printf(m, "\nWrites: %d total %d failed", 1352 atomic_read(&sent[SMB2_WRITE_HE]), 1353 atomic_read(&failed[SMB2_WRITE_HE])); 1354 seq_printf(m, "\nLocks: %d total %d failed", 1355 atomic_read(&sent[SMB2_LOCK_HE]), 1356 atomic_read(&failed[SMB2_LOCK_HE])); 1357 seq_printf(m, "\nIOCTLs: %d total %d failed", 1358 atomic_read(&sent[SMB2_IOCTL_HE]), 1359 atomic_read(&failed[SMB2_IOCTL_HE])); 1360 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1361 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1362 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1363 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1364 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1365 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1366 seq_printf(m, "\nQueryInfos: %d total %d failed", 1367 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1368 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1369 seq_printf(m, "\nSetInfos: %d total %d failed", 1370 atomic_read(&sent[SMB2_SET_INFO_HE]), 1371 atomic_read(&failed[SMB2_SET_INFO_HE])); 1372 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1373 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1374 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1375 } 1376 1377 static void 1378 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1379 { 1380 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1381 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1382 1383 cfile->fid.persistent_fid = fid->persistent_fid; 1384 cfile->fid.volatile_fid = fid->volatile_fid; 1385 cfile->fid.access = fid->access; 1386 #ifdef CONFIG_CIFS_DEBUG2 1387 cfile->fid.mid = fid->mid; 1388 #endif /* CIFS_DEBUG2 */ 1389 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1390 &fid->purge_cache); 1391 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1392 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1393 } 1394 1395 static int 1396 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1397 struct cifs_fid *fid) 1398 { 1399 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1400 } 1401 1402 static int 1403 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1404 struct cifsFileInfo *cfile) 1405 { 1406 struct smb2_file_network_open_info file_inf; 1407 struct inode *inode; 1408 int rc; 1409 1410 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1411 cfile->fid.volatile_fid, &file_inf); 1412 if (rc) 1413 return rc; 1414 1415 inode = d_inode(cfile->dentry); 1416 1417 spin_lock(&inode->i_lock); 1418 CIFS_I(inode)->time = jiffies; 1419 1420 /* Creation time should not need to be updated on close */ 1421 if (file_inf.LastWriteTime) 1422 inode_set_mtime_to_ts(inode, 1423 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1424 if (file_inf.ChangeTime) 1425 inode_set_ctime_to_ts(inode, 1426 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1427 if (file_inf.LastAccessTime) 1428 inode_set_atime_to_ts(inode, 1429 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1430 1431 /* 1432 * i_blocks is not related to (i_size / i_blksize), 1433 * but instead 512 byte (2**9) size is required for 1434 * calculating num blocks. 1435 */ 1436 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1437 inode->i_blocks = 1438 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1439 1440 /* End of file and Attributes should not have to be updated on close */ 1441 spin_unlock(&inode->i_lock); 1442 return rc; 1443 } 1444 1445 static int 1446 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1447 u64 persistent_fid, u64 volatile_fid, 1448 struct copychunk_ioctl *pcchunk) 1449 { 1450 int rc; 1451 unsigned int ret_data_len; 1452 struct resume_key_req *res_key; 1453 1454 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1455 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1456 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1457 1458 if (rc == -EOPNOTSUPP) { 1459 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1460 goto req_res_key_exit; 1461 } else if (rc) { 1462 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1463 goto req_res_key_exit; 1464 } 1465 if (ret_data_len < sizeof(struct resume_key_req)) { 1466 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1467 rc = -EINVAL; 1468 goto req_res_key_exit; 1469 } 1470 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1471 1472 req_res_key_exit: 1473 kfree(res_key); 1474 return rc; 1475 } 1476 1477 static int 1478 smb2_ioctl_query_info(const unsigned int xid, 1479 struct cifs_tcon *tcon, 1480 struct cifs_sb_info *cifs_sb, 1481 __le16 *path, int is_dir, 1482 unsigned long p) 1483 { 1484 struct smb2_compound_vars *vars; 1485 struct smb_rqst *rqst; 1486 struct kvec *rsp_iov; 1487 struct cifs_ses *ses = tcon->ses; 1488 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1489 char __user *arg = (char __user *)p; 1490 struct smb_query_info qi; 1491 struct smb_query_info __user *pqi; 1492 int rc = 0; 1493 int flags = CIFS_CP_CREATE_CLOSE_OP; 1494 struct smb2_query_info_rsp *qi_rsp = NULL; 1495 struct smb2_ioctl_rsp *io_rsp = NULL; 1496 void *buffer = NULL; 1497 int resp_buftype[3]; 1498 struct cifs_open_parms oparms; 1499 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1500 struct cifs_fid fid; 1501 unsigned int size[2]; 1502 void *data[2]; 1503 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1504 void (*free_req1_func)(struct smb_rqst *r); 1505 1506 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1507 if (vars == NULL) 1508 return -ENOMEM; 1509 rqst = &vars->rqst[0]; 1510 rsp_iov = &vars->rsp_iov[0]; 1511 1512 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1513 1514 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1515 rc = -EFAULT; 1516 goto free_vars; 1517 } 1518 if (qi.output_buffer_length > 1024) { 1519 rc = -EINVAL; 1520 goto free_vars; 1521 } 1522 1523 if (!ses || !server) { 1524 rc = -EIO; 1525 goto free_vars; 1526 } 1527 1528 if (smb3_encryption_required(tcon)) 1529 flags |= CIFS_TRANSFORM_REQ; 1530 1531 if (qi.output_buffer_length) { 1532 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1533 if (IS_ERR(buffer)) { 1534 rc = PTR_ERR(buffer); 1535 goto free_vars; 1536 } 1537 } 1538 1539 /* Open */ 1540 rqst[0].rq_iov = &vars->open_iov[0]; 1541 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1542 1543 oparms = (struct cifs_open_parms) { 1544 .tcon = tcon, 1545 .disposition = FILE_OPEN, 1546 .create_options = cifs_create_options(cifs_sb, create_options), 1547 .fid = &fid, 1548 }; 1549 1550 if (qi.flags & PASSTHRU_FSCTL) { 1551 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1552 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1553 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1554 break; 1555 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1556 oparms.desired_access = GENERIC_ALL; 1557 break; 1558 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1559 oparms.desired_access = GENERIC_READ; 1560 break; 1561 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1562 oparms.desired_access = GENERIC_WRITE; 1563 break; 1564 } 1565 } else if (qi.flags & PASSTHRU_SET_INFO) { 1566 oparms.desired_access = GENERIC_WRITE; 1567 } else { 1568 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1569 } 1570 1571 rc = SMB2_open_init(tcon, server, 1572 &rqst[0], &oplock, &oparms, path); 1573 if (rc) 1574 goto free_output_buffer; 1575 smb2_set_next_command(tcon, &rqst[0]); 1576 1577 /* Query */ 1578 if (qi.flags & PASSTHRU_FSCTL) { 1579 /* Can eventually relax perm check since server enforces too */ 1580 if (!capable(CAP_SYS_ADMIN)) { 1581 rc = -EPERM; 1582 goto free_open_req; 1583 } 1584 rqst[1].rq_iov = &vars->io_iov[0]; 1585 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1586 1587 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1588 qi.info_type, buffer, qi.output_buffer_length, 1589 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1590 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1591 free_req1_func = SMB2_ioctl_free; 1592 } else if (qi.flags == PASSTHRU_SET_INFO) { 1593 /* Can eventually relax perm check since server enforces too */ 1594 if (!capable(CAP_SYS_ADMIN)) { 1595 rc = -EPERM; 1596 goto free_open_req; 1597 } 1598 if (qi.output_buffer_length < 8) { 1599 rc = -EINVAL; 1600 goto free_open_req; 1601 } 1602 rqst[1].rq_iov = vars->si_iov; 1603 rqst[1].rq_nvec = 1; 1604 1605 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1606 size[0] = 8; 1607 data[0] = buffer; 1608 1609 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1610 current->tgid, FILE_END_OF_FILE_INFORMATION, 1611 SMB2_O_INFO_FILE, 0, data, size); 1612 free_req1_func = SMB2_set_info_free; 1613 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1614 rqst[1].rq_iov = &vars->qi_iov; 1615 rqst[1].rq_nvec = 1; 1616 1617 rc = SMB2_query_info_init(tcon, server, 1618 &rqst[1], COMPOUND_FID, 1619 COMPOUND_FID, qi.file_info_class, 1620 qi.info_type, qi.additional_information, 1621 qi.input_buffer_length, 1622 qi.output_buffer_length, buffer); 1623 free_req1_func = SMB2_query_info_free; 1624 } else { /* unknown flags */ 1625 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1626 qi.flags); 1627 rc = -EINVAL; 1628 } 1629 1630 if (rc) 1631 goto free_open_req; 1632 smb2_set_next_command(tcon, &rqst[1]); 1633 smb2_set_related(&rqst[1]); 1634 1635 /* Close */ 1636 rqst[2].rq_iov = &vars->close_iov; 1637 rqst[2].rq_nvec = 1; 1638 1639 rc = SMB2_close_init(tcon, server, 1640 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1641 if (rc) 1642 goto free_req_1; 1643 smb2_set_related(&rqst[2]); 1644 1645 rc = compound_send_recv(xid, ses, server, 1646 flags, 3, rqst, 1647 resp_buftype, rsp_iov); 1648 if (rc) 1649 goto out; 1650 1651 /* No need to bump num_remote_opens since handle immediately closed */ 1652 if (qi.flags & PASSTHRU_FSCTL) { 1653 pqi = (struct smb_query_info __user *)arg; 1654 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1655 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1656 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1657 if (qi.input_buffer_length > 0 && 1658 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1659 > rsp_iov[1].iov_len) { 1660 rc = -EFAULT; 1661 goto out; 1662 } 1663 1664 if (copy_to_user(&pqi->input_buffer_length, 1665 &qi.input_buffer_length, 1666 sizeof(qi.input_buffer_length))) { 1667 rc = -EFAULT; 1668 goto out; 1669 } 1670 1671 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1672 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1673 qi.input_buffer_length)) 1674 rc = -EFAULT; 1675 } else { 1676 pqi = (struct smb_query_info __user *)arg; 1677 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1678 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1679 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1680 if (copy_to_user(&pqi->input_buffer_length, 1681 &qi.input_buffer_length, 1682 sizeof(qi.input_buffer_length))) { 1683 rc = -EFAULT; 1684 goto out; 1685 } 1686 1687 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1688 qi.input_buffer_length)) 1689 rc = -EFAULT; 1690 } 1691 1692 out: 1693 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1694 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1695 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1696 SMB2_close_free(&rqst[2]); 1697 free_req_1: 1698 free_req1_func(&rqst[1]); 1699 free_open_req: 1700 SMB2_open_free(&rqst[0]); 1701 free_output_buffer: 1702 kfree(buffer); 1703 free_vars: 1704 kfree(vars); 1705 return rc; 1706 } 1707 1708 static ssize_t 1709 smb2_copychunk_range(const unsigned int xid, 1710 struct cifsFileInfo *srcfile, 1711 struct cifsFileInfo *trgtfile, u64 src_off, 1712 u64 len, u64 dest_off) 1713 { 1714 int rc; 1715 unsigned int ret_data_len; 1716 struct copychunk_ioctl *pcchunk; 1717 struct copychunk_ioctl_rsp *retbuf = NULL; 1718 struct cifs_tcon *tcon; 1719 int chunks_copied = 0; 1720 bool chunk_sizes_updated = false; 1721 ssize_t bytes_written, total_bytes_written = 0; 1722 1723 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1724 if (pcchunk == NULL) 1725 return -ENOMEM; 1726 1727 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1728 /* Request a key from the server to identify the source of the copy */ 1729 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1730 srcfile->fid.persistent_fid, 1731 srcfile->fid.volatile_fid, pcchunk); 1732 1733 /* Note: request_res_key sets res_key null only if rc !=0 */ 1734 if (rc) 1735 goto cchunk_out; 1736 1737 /* For now array only one chunk long, will make more flexible later */ 1738 pcchunk->ChunkCount = cpu_to_le32(1); 1739 pcchunk->Reserved = 0; 1740 pcchunk->Reserved2 = 0; 1741 1742 tcon = tlink_tcon(trgtfile->tlink); 1743 1744 while (len > 0) { 1745 pcchunk->SourceOffset = cpu_to_le64(src_off); 1746 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1747 pcchunk->Length = 1748 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1749 1750 /* Request server copy to target from src identified by key */ 1751 kfree(retbuf); 1752 retbuf = NULL; 1753 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1754 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1755 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1756 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1757 if (rc == 0) { 1758 if (ret_data_len != 1759 sizeof(struct copychunk_ioctl_rsp)) { 1760 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1761 rc = -EIO; 1762 goto cchunk_out; 1763 } 1764 if (retbuf->TotalBytesWritten == 0) { 1765 cifs_dbg(FYI, "no bytes copied\n"); 1766 rc = -EIO; 1767 goto cchunk_out; 1768 } 1769 /* 1770 * Check if server claimed to write more than we asked 1771 */ 1772 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1773 le32_to_cpu(pcchunk->Length)) { 1774 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1775 rc = -EIO; 1776 goto cchunk_out; 1777 } 1778 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1779 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1780 rc = -EIO; 1781 goto cchunk_out; 1782 } 1783 chunks_copied++; 1784 1785 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1786 src_off += bytes_written; 1787 dest_off += bytes_written; 1788 len -= bytes_written; 1789 total_bytes_written += bytes_written; 1790 1791 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1792 le32_to_cpu(retbuf->ChunksWritten), 1793 le32_to_cpu(retbuf->ChunkBytesWritten), 1794 bytes_written); 1795 } else if (rc == -EINVAL) { 1796 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1797 goto cchunk_out; 1798 1799 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1800 le32_to_cpu(retbuf->ChunksWritten), 1801 le32_to_cpu(retbuf->ChunkBytesWritten), 1802 le32_to_cpu(retbuf->TotalBytesWritten)); 1803 1804 /* 1805 * Check if this is the first request using these sizes, 1806 * (ie check if copy succeed once with original sizes 1807 * and check if the server gave us different sizes after 1808 * we already updated max sizes on previous request). 1809 * if not then why is the server returning an error now 1810 */ 1811 if ((chunks_copied != 0) || chunk_sizes_updated) 1812 goto cchunk_out; 1813 1814 /* Check that server is not asking us to grow size */ 1815 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1816 tcon->max_bytes_chunk) 1817 tcon->max_bytes_chunk = 1818 le32_to_cpu(retbuf->ChunkBytesWritten); 1819 else 1820 goto cchunk_out; /* server gave us bogus size */ 1821 1822 /* No need to change MaxChunks since already set to 1 */ 1823 chunk_sizes_updated = true; 1824 } else 1825 goto cchunk_out; 1826 } 1827 1828 cchunk_out: 1829 kfree(pcchunk); 1830 kfree(retbuf); 1831 if (rc) 1832 return rc; 1833 else 1834 return total_bytes_written; 1835 } 1836 1837 static int 1838 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1839 struct cifs_fid *fid) 1840 { 1841 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1842 } 1843 1844 static unsigned int 1845 smb2_read_data_offset(char *buf) 1846 { 1847 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1848 1849 return rsp->DataOffset; 1850 } 1851 1852 static unsigned int 1853 smb2_read_data_length(char *buf, bool in_remaining) 1854 { 1855 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1856 1857 if (in_remaining) 1858 return le32_to_cpu(rsp->DataRemaining); 1859 1860 return le32_to_cpu(rsp->DataLength); 1861 } 1862 1863 1864 static int 1865 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1866 struct cifs_io_parms *parms, unsigned int *bytes_read, 1867 char **buf, int *buf_type) 1868 { 1869 parms->persistent_fid = pfid->persistent_fid; 1870 parms->volatile_fid = pfid->volatile_fid; 1871 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1872 } 1873 1874 static int 1875 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1876 struct cifs_io_parms *parms, unsigned int *written, 1877 struct kvec *iov, unsigned long nr_segs) 1878 { 1879 1880 parms->persistent_fid = pfid->persistent_fid; 1881 parms->volatile_fid = pfid->volatile_fid; 1882 return SMB2_write(xid, parms, written, iov, nr_segs); 1883 } 1884 1885 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1886 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1887 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1888 { 1889 struct cifsInodeInfo *cifsi; 1890 int rc; 1891 1892 cifsi = CIFS_I(inode); 1893 1894 /* if file already sparse don't bother setting sparse again */ 1895 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1896 return true; /* already sparse */ 1897 1898 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1899 return true; /* already not sparse */ 1900 1901 /* 1902 * Can't check for sparse support on share the usual way via the 1903 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1904 * since Samba server doesn't set the flag on the share, yet 1905 * supports the set sparse FSCTL and returns sparse correctly 1906 * in the file attributes. If we fail setting sparse though we 1907 * mark that server does not support sparse files for this share 1908 * to avoid repeatedly sending the unsupported fsctl to server 1909 * if the file is repeatedly extended. 1910 */ 1911 if (tcon->broken_sparse_sup) 1912 return false; 1913 1914 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1915 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1916 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1917 if (rc) { 1918 tcon->broken_sparse_sup = true; 1919 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1920 return false; 1921 } 1922 1923 if (setsparse) 1924 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1925 else 1926 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1927 1928 return true; 1929 } 1930 1931 static int 1932 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1933 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1934 { 1935 struct inode *inode; 1936 1937 /* 1938 * If extending file more than one page make sparse. Many Linux fs 1939 * make files sparse by default when extending via ftruncate 1940 */ 1941 inode = d_inode(cfile->dentry); 1942 1943 if (!set_alloc && (size > inode->i_size + 8192)) { 1944 __u8 set_sparse = 1; 1945 1946 /* whether set sparse succeeds or not, extend the file */ 1947 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1948 } 1949 1950 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1951 cfile->fid.volatile_fid, cfile->pid, size); 1952 } 1953 1954 static int 1955 smb2_duplicate_extents(const unsigned int xid, 1956 struct cifsFileInfo *srcfile, 1957 struct cifsFileInfo *trgtfile, u64 src_off, 1958 u64 len, u64 dest_off) 1959 { 1960 int rc; 1961 unsigned int ret_data_len; 1962 struct inode *inode; 1963 struct duplicate_extents_to_file dup_ext_buf; 1964 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 1965 1966 /* server fileays advertise duplicate extent support with this flag */ 1967 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 1968 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 1969 return -EOPNOTSUPP; 1970 1971 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 1972 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 1973 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 1974 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 1975 dup_ext_buf.ByteCount = cpu_to_le64(len); 1976 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 1977 src_off, dest_off, len); 1978 1979 inode = d_inode(trgtfile->dentry); 1980 if (inode->i_size < dest_off + len) { 1981 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 1982 if (rc) 1983 goto duplicate_extents_out; 1984 1985 /* 1986 * Although also could set plausible allocation size (i_blocks) 1987 * here in addition to setting the file size, in reflink 1988 * it is likely that the target file is sparse. Its allocation 1989 * size will be queried on next revalidate, but it is important 1990 * to make sure that file's cached size is updated immediately 1991 */ 1992 cifs_setsize(inode, dest_off + len); 1993 } 1994 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1995 trgtfile->fid.volatile_fid, 1996 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 1997 (char *)&dup_ext_buf, 1998 sizeof(struct duplicate_extents_to_file), 1999 CIFSMaxBufSize, NULL, 2000 &ret_data_len); 2001 2002 if (ret_data_len > 0) 2003 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2004 2005 duplicate_extents_out: 2006 return rc; 2007 } 2008 2009 static int 2010 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2011 struct cifsFileInfo *cfile) 2012 { 2013 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2014 cfile->fid.volatile_fid); 2015 } 2016 2017 static int 2018 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2019 struct cifsFileInfo *cfile) 2020 { 2021 struct fsctl_set_integrity_information_req integr_info; 2022 unsigned int ret_data_len; 2023 2024 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2025 integr_info.Flags = 0; 2026 integr_info.Reserved = 0; 2027 2028 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2029 cfile->fid.volatile_fid, 2030 FSCTL_SET_INTEGRITY_INFORMATION, 2031 (char *)&integr_info, 2032 sizeof(struct fsctl_set_integrity_information_req), 2033 CIFSMaxBufSize, NULL, 2034 &ret_data_len); 2035 2036 } 2037 2038 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2039 #define GMT_TOKEN_SIZE 50 2040 2041 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2042 2043 /* 2044 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2045 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2046 */ 2047 static int 2048 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2049 struct cifsFileInfo *cfile, void __user *ioc_buf) 2050 { 2051 char *retbuf = NULL; 2052 unsigned int ret_data_len = 0; 2053 int rc; 2054 u32 max_response_size; 2055 struct smb_snapshot_array snapshot_in; 2056 2057 /* 2058 * On the first query to enumerate the list of snapshots available 2059 * for this volume the buffer begins with 0 (number of snapshots 2060 * which can be returned is zero since at that point we do not know 2061 * how big the buffer needs to be). On the second query, 2062 * it (ret_data_len) is set to number of snapshots so we can 2063 * know to set the maximum response size larger (see below). 2064 */ 2065 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2066 return -EFAULT; 2067 2068 /* 2069 * Note that for snapshot queries that servers like Azure expect that 2070 * the first query be minimal size (and just used to get the number/size 2071 * of previous versions) so response size must be specified as EXACTLY 2072 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2073 * of eight bytes. 2074 */ 2075 if (ret_data_len == 0) 2076 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2077 else 2078 max_response_size = CIFSMaxBufSize; 2079 2080 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2081 cfile->fid.volatile_fid, 2082 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2083 NULL, 0 /* no input data */, max_response_size, 2084 (char **)&retbuf, 2085 &ret_data_len); 2086 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2087 rc, ret_data_len); 2088 if (rc) 2089 return rc; 2090 2091 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2092 /* Fixup buffer */ 2093 if (copy_from_user(&snapshot_in, ioc_buf, 2094 sizeof(struct smb_snapshot_array))) { 2095 rc = -EFAULT; 2096 kfree(retbuf); 2097 return rc; 2098 } 2099 2100 /* 2101 * Check for min size, ie not large enough to fit even one GMT 2102 * token (snapshot). On the first ioctl some users may pass in 2103 * smaller size (or zero) to simply get the size of the array 2104 * so the user space caller can allocate sufficient memory 2105 * and retry the ioctl again with larger array size sufficient 2106 * to hold all of the snapshot GMT tokens on the second try. 2107 */ 2108 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2109 ret_data_len = sizeof(struct smb_snapshot_array); 2110 2111 /* 2112 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2113 * the snapshot array (of 50 byte GMT tokens) each 2114 * representing an available previous version of the data 2115 */ 2116 if (ret_data_len > (snapshot_in.snapshot_array_size + 2117 sizeof(struct smb_snapshot_array))) 2118 ret_data_len = snapshot_in.snapshot_array_size + 2119 sizeof(struct smb_snapshot_array); 2120 2121 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2122 rc = -EFAULT; 2123 } 2124 2125 kfree(retbuf); 2126 return rc; 2127 } 2128 2129 2130 2131 static int 2132 smb3_notify(const unsigned int xid, struct file *pfile, 2133 void __user *ioc_buf, bool return_changes) 2134 { 2135 struct smb3_notify_info notify; 2136 struct smb3_notify_info __user *pnotify_buf; 2137 struct dentry *dentry = pfile->f_path.dentry; 2138 struct inode *inode = file_inode(pfile); 2139 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2140 struct cifs_open_parms oparms; 2141 struct cifs_fid fid; 2142 struct cifs_tcon *tcon; 2143 const unsigned char *path; 2144 char *returned_ioctl_info = NULL; 2145 void *page = alloc_dentry_path(); 2146 __le16 *utf16_path = NULL; 2147 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2148 int rc = 0; 2149 __u32 ret_len = 0; 2150 2151 path = build_path_from_dentry(dentry, page); 2152 if (IS_ERR(path)) { 2153 rc = PTR_ERR(path); 2154 goto notify_exit; 2155 } 2156 2157 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2158 if (utf16_path == NULL) { 2159 rc = -ENOMEM; 2160 goto notify_exit; 2161 } 2162 2163 if (return_changes) { 2164 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2165 rc = -EFAULT; 2166 goto notify_exit; 2167 } 2168 } else { 2169 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2170 rc = -EFAULT; 2171 goto notify_exit; 2172 } 2173 notify.data_len = 0; 2174 } 2175 2176 tcon = cifs_sb_master_tcon(cifs_sb); 2177 oparms = (struct cifs_open_parms) { 2178 .tcon = tcon, 2179 .path = path, 2180 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2181 .disposition = FILE_OPEN, 2182 .create_options = cifs_create_options(cifs_sb, 0), 2183 .fid = &fid, 2184 }; 2185 2186 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2187 NULL); 2188 if (rc) 2189 goto notify_exit; 2190 2191 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2192 notify.watch_tree, notify.completion_filter, 2193 notify.data_len, &returned_ioctl_info, &ret_len); 2194 2195 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2196 2197 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2198 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2199 if (ret_len > notify.data_len) 2200 ret_len = notify.data_len; 2201 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2202 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2203 rc = -EFAULT; 2204 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2205 rc = -EFAULT; 2206 } 2207 kfree(returned_ioctl_info); 2208 notify_exit: 2209 free_dentry_path(page); 2210 kfree(utf16_path); 2211 return rc; 2212 } 2213 2214 static int 2215 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2216 const char *path, struct cifs_sb_info *cifs_sb, 2217 struct cifs_fid *fid, __u16 search_flags, 2218 struct cifs_search_info *srch_inf) 2219 { 2220 __le16 *utf16_path; 2221 struct smb_rqst rqst[2]; 2222 struct kvec rsp_iov[2]; 2223 int resp_buftype[2]; 2224 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2225 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2226 int rc, flags = 0; 2227 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2228 struct cifs_open_parms oparms; 2229 struct smb2_query_directory_rsp *qd_rsp = NULL; 2230 struct smb2_create_rsp *op_rsp = NULL; 2231 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2232 int retry_count = 0; 2233 2234 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2235 if (!utf16_path) 2236 return -ENOMEM; 2237 2238 if (smb3_encryption_required(tcon)) 2239 flags |= CIFS_TRANSFORM_REQ; 2240 2241 memset(rqst, 0, sizeof(rqst)); 2242 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2243 memset(rsp_iov, 0, sizeof(rsp_iov)); 2244 2245 /* Open */ 2246 memset(&open_iov, 0, sizeof(open_iov)); 2247 rqst[0].rq_iov = open_iov; 2248 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2249 2250 oparms = (struct cifs_open_parms) { 2251 .tcon = tcon, 2252 .path = path, 2253 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2254 .disposition = FILE_OPEN, 2255 .create_options = cifs_create_options(cifs_sb, 0), 2256 .fid = fid, 2257 }; 2258 2259 rc = SMB2_open_init(tcon, server, 2260 &rqst[0], &oplock, &oparms, utf16_path); 2261 if (rc) 2262 goto qdf_free; 2263 smb2_set_next_command(tcon, &rqst[0]); 2264 2265 /* Query directory */ 2266 srch_inf->entries_in_buffer = 0; 2267 srch_inf->index_of_last_entry = 2; 2268 2269 memset(&qd_iov, 0, sizeof(qd_iov)); 2270 rqst[1].rq_iov = qd_iov; 2271 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2272 2273 rc = SMB2_query_directory_init(xid, tcon, server, 2274 &rqst[1], 2275 COMPOUND_FID, COMPOUND_FID, 2276 0, srch_inf->info_level); 2277 if (rc) 2278 goto qdf_free; 2279 2280 smb2_set_related(&rqst[1]); 2281 2282 again: 2283 rc = compound_send_recv(xid, tcon->ses, server, 2284 flags, 2, rqst, 2285 resp_buftype, rsp_iov); 2286 2287 if (rc == -EAGAIN && retry_count++ < 10) 2288 goto again; 2289 2290 /* If the open failed there is nothing to do */ 2291 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2292 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2293 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2294 goto qdf_free; 2295 } 2296 fid->persistent_fid = op_rsp->PersistentFileId; 2297 fid->volatile_fid = op_rsp->VolatileFileId; 2298 2299 /* Anything else than ENODATA means a genuine error */ 2300 if (rc && rc != -ENODATA) { 2301 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2302 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2303 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2304 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2305 goto qdf_free; 2306 } 2307 2308 atomic_inc(&tcon->num_remote_opens); 2309 2310 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2311 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2312 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2313 tcon->tid, tcon->ses->Suid, 0, 0); 2314 srch_inf->endOfSearch = true; 2315 rc = 0; 2316 goto qdf_free; 2317 } 2318 2319 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2320 srch_inf); 2321 if (rc) { 2322 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2323 tcon->ses->Suid, 0, 0, rc); 2324 goto qdf_free; 2325 } 2326 resp_buftype[1] = CIFS_NO_BUFFER; 2327 2328 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2329 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2330 2331 qdf_free: 2332 kfree(utf16_path); 2333 SMB2_open_free(&rqst[0]); 2334 SMB2_query_directory_free(&rqst[1]); 2335 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2336 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2337 return rc; 2338 } 2339 2340 static int 2341 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2342 struct cifs_fid *fid, __u16 search_flags, 2343 struct cifs_search_info *srch_inf) 2344 { 2345 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2346 fid->volatile_fid, 0, srch_inf); 2347 } 2348 2349 static int 2350 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2351 struct cifs_fid *fid) 2352 { 2353 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2354 } 2355 2356 /* 2357 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2358 * the number of credits and return true. Otherwise - return false. 2359 */ 2360 static bool 2361 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2362 { 2363 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2364 int scredits, in_flight; 2365 2366 if (shdr->Status != STATUS_PENDING) 2367 return false; 2368 2369 if (shdr->CreditRequest) { 2370 spin_lock(&server->req_lock); 2371 server->credits += le16_to_cpu(shdr->CreditRequest); 2372 scredits = server->credits; 2373 in_flight = server->in_flight; 2374 spin_unlock(&server->req_lock); 2375 wake_up(&server->request_q); 2376 2377 trace_smb3_pend_credits(server->CurrentMid, 2378 server->conn_id, server->hostname, scredits, 2379 le16_to_cpu(shdr->CreditRequest), in_flight); 2380 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2381 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2382 } 2383 2384 return true; 2385 } 2386 2387 static bool 2388 smb2_is_session_expired(char *buf) 2389 { 2390 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2391 2392 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2393 shdr->Status != STATUS_USER_SESSION_DELETED) 2394 return false; 2395 2396 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2397 le64_to_cpu(shdr->SessionId), 2398 le16_to_cpu(shdr->Command), 2399 le64_to_cpu(shdr->MessageId)); 2400 cifs_dbg(FYI, "Session expired or deleted\n"); 2401 2402 return true; 2403 } 2404 2405 static bool 2406 smb2_is_status_io_timeout(char *buf) 2407 { 2408 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2409 2410 if (shdr->Status == STATUS_IO_TIMEOUT) 2411 return true; 2412 else 2413 return false; 2414 } 2415 2416 static bool 2417 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2418 { 2419 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2420 struct TCP_Server_Info *pserver; 2421 struct cifs_ses *ses; 2422 struct cifs_tcon *tcon; 2423 2424 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2425 return false; 2426 2427 /* If server is a channel, select the primary channel */ 2428 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2429 2430 spin_lock(&cifs_tcp_ses_lock); 2431 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2432 if (cifs_ses_exiting(ses)) 2433 continue; 2434 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2435 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2436 spin_lock(&tcon->tc_lock); 2437 tcon->need_reconnect = true; 2438 spin_unlock(&tcon->tc_lock); 2439 spin_unlock(&cifs_tcp_ses_lock); 2440 pr_warn_once("Server share %s deleted.\n", 2441 tcon->tree_name); 2442 return true; 2443 } 2444 } 2445 } 2446 spin_unlock(&cifs_tcp_ses_lock); 2447 2448 return false; 2449 } 2450 2451 static int 2452 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2453 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2454 { 2455 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2456 return SMB2_lease_break(0, tcon, cinode->lease_key, 2457 smb2_get_lease_state(cinode)); 2458 2459 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2460 CIFS_CACHE_READ(cinode) ? 1 : 0); 2461 } 2462 2463 void 2464 smb2_set_related(struct smb_rqst *rqst) 2465 { 2466 struct smb2_hdr *shdr; 2467 2468 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2469 if (shdr == NULL) { 2470 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2471 return; 2472 } 2473 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2474 } 2475 2476 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2477 2478 void 2479 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2480 { 2481 struct smb2_hdr *shdr; 2482 struct cifs_ses *ses = tcon->ses; 2483 struct TCP_Server_Info *server = ses->server; 2484 unsigned long len = smb_rqst_len(server, rqst); 2485 int i, num_padding; 2486 2487 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2488 if (shdr == NULL) { 2489 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2490 return; 2491 } 2492 2493 /* SMB headers in a compound are 8 byte aligned. */ 2494 2495 /* No padding needed */ 2496 if (!(len & 7)) 2497 goto finished; 2498 2499 num_padding = 8 - (len & 7); 2500 if (!smb3_encryption_required(tcon)) { 2501 /* 2502 * If we do not have encryption then we can just add an extra 2503 * iov for the padding. 2504 */ 2505 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2506 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2507 rqst->rq_nvec++; 2508 len += num_padding; 2509 } else { 2510 /* 2511 * We can not add a small padding iov for the encryption case 2512 * because the encryption framework can not handle the padding 2513 * iovs. 2514 * We have to flatten this into a single buffer and add 2515 * the padding to it. 2516 */ 2517 for (i = 1; i < rqst->rq_nvec; i++) { 2518 memcpy(rqst->rq_iov[0].iov_base + 2519 rqst->rq_iov[0].iov_len, 2520 rqst->rq_iov[i].iov_base, 2521 rqst->rq_iov[i].iov_len); 2522 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2523 } 2524 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2525 0, num_padding); 2526 rqst->rq_iov[0].iov_len += num_padding; 2527 len += num_padding; 2528 rqst->rq_nvec = 1; 2529 } 2530 2531 finished: 2532 shdr->NextCommand = cpu_to_le32(len); 2533 } 2534 2535 /* 2536 * Passes the query info response back to the caller on success. 2537 * Caller need to free this with free_rsp_buf(). 2538 */ 2539 int 2540 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2541 const char *path, u32 desired_access, 2542 u32 class, u32 type, u32 output_len, 2543 struct kvec *rsp, int *buftype, 2544 struct cifs_sb_info *cifs_sb) 2545 { 2546 struct smb2_compound_vars *vars; 2547 struct cifs_ses *ses = tcon->ses; 2548 struct TCP_Server_Info *server = cifs_pick_channel(ses); 2549 int flags = CIFS_CP_CREATE_CLOSE_OP; 2550 struct smb_rqst *rqst; 2551 int resp_buftype[3]; 2552 struct kvec *rsp_iov; 2553 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2554 struct cifs_open_parms oparms; 2555 struct cifs_fid fid; 2556 int rc; 2557 __le16 *utf16_path; 2558 struct cached_fid *cfid = NULL; 2559 2560 if (!path) 2561 path = ""; 2562 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2563 if (!utf16_path) 2564 return -ENOMEM; 2565 2566 if (smb3_encryption_required(tcon)) 2567 flags |= CIFS_TRANSFORM_REQ; 2568 2569 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2570 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2571 if (!vars) { 2572 rc = -ENOMEM; 2573 goto out_free_path; 2574 } 2575 rqst = vars->rqst; 2576 rsp_iov = vars->rsp_iov; 2577 2578 /* 2579 * We can only call this for things we know are directories. 2580 */ 2581 if (!strcmp(path, "")) 2582 open_cached_dir(xid, tcon, path, cifs_sb, false, 2583 &cfid); /* cfid null if open dir failed */ 2584 2585 rqst[0].rq_iov = vars->open_iov; 2586 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2587 2588 oparms = (struct cifs_open_parms) { 2589 .tcon = tcon, 2590 .path = path, 2591 .desired_access = desired_access, 2592 .disposition = FILE_OPEN, 2593 .create_options = cifs_create_options(cifs_sb, 0), 2594 .fid = &fid, 2595 }; 2596 2597 rc = SMB2_open_init(tcon, server, 2598 &rqst[0], &oplock, &oparms, utf16_path); 2599 if (rc) 2600 goto qic_exit; 2601 smb2_set_next_command(tcon, &rqst[0]); 2602 2603 rqst[1].rq_iov = &vars->qi_iov; 2604 rqst[1].rq_nvec = 1; 2605 2606 if (cfid) { 2607 rc = SMB2_query_info_init(tcon, server, 2608 &rqst[1], 2609 cfid->fid.persistent_fid, 2610 cfid->fid.volatile_fid, 2611 class, type, 0, 2612 output_len, 0, 2613 NULL); 2614 } else { 2615 rc = SMB2_query_info_init(tcon, server, 2616 &rqst[1], 2617 COMPOUND_FID, 2618 COMPOUND_FID, 2619 class, type, 0, 2620 output_len, 0, 2621 NULL); 2622 } 2623 if (rc) 2624 goto qic_exit; 2625 if (!cfid) { 2626 smb2_set_next_command(tcon, &rqst[1]); 2627 smb2_set_related(&rqst[1]); 2628 } 2629 2630 rqst[2].rq_iov = &vars->close_iov; 2631 rqst[2].rq_nvec = 1; 2632 2633 rc = SMB2_close_init(tcon, server, 2634 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2635 if (rc) 2636 goto qic_exit; 2637 smb2_set_related(&rqst[2]); 2638 2639 if (cfid) { 2640 rc = compound_send_recv(xid, ses, server, 2641 flags, 1, &rqst[1], 2642 &resp_buftype[1], &rsp_iov[1]); 2643 } else { 2644 rc = compound_send_recv(xid, ses, server, 2645 flags, 3, rqst, 2646 resp_buftype, rsp_iov); 2647 } 2648 if (rc) { 2649 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2650 if (rc == -EREMCHG) { 2651 tcon->need_reconnect = true; 2652 pr_warn_once("server share %s deleted\n", 2653 tcon->tree_name); 2654 } 2655 goto qic_exit; 2656 } 2657 *rsp = rsp_iov[1]; 2658 *buftype = resp_buftype[1]; 2659 2660 qic_exit: 2661 SMB2_open_free(&rqst[0]); 2662 SMB2_query_info_free(&rqst[1]); 2663 SMB2_close_free(&rqst[2]); 2664 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2665 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2666 if (cfid) 2667 close_cached_dir(cfid); 2668 kfree(vars); 2669 out_free_path: 2670 kfree(utf16_path); 2671 return rc; 2672 } 2673 2674 static int 2675 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2676 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2677 { 2678 struct smb2_query_info_rsp *rsp; 2679 struct smb2_fs_full_size_info *info = NULL; 2680 struct kvec rsp_iov = {NULL, 0}; 2681 int buftype = CIFS_NO_BUFFER; 2682 int rc; 2683 2684 2685 rc = smb2_query_info_compound(xid, tcon, "", 2686 FILE_READ_ATTRIBUTES, 2687 FS_FULL_SIZE_INFORMATION, 2688 SMB2_O_INFO_FILESYSTEM, 2689 sizeof(struct smb2_fs_full_size_info), 2690 &rsp_iov, &buftype, cifs_sb); 2691 if (rc) 2692 goto qfs_exit; 2693 2694 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2695 buf->f_type = SMB2_SUPER_MAGIC; 2696 info = (struct smb2_fs_full_size_info *)( 2697 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2698 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2699 le32_to_cpu(rsp->OutputBufferLength), 2700 &rsp_iov, 2701 sizeof(struct smb2_fs_full_size_info)); 2702 if (!rc) 2703 smb2_copy_fs_info_to_kstatfs(info, buf); 2704 2705 qfs_exit: 2706 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2707 free_rsp_buf(buftype, rsp_iov.iov_base); 2708 return rc; 2709 } 2710 2711 static int 2712 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2713 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2714 { 2715 int rc; 2716 __le16 srch_path = 0; /* Null - open root of share */ 2717 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2718 struct cifs_open_parms oparms; 2719 struct cifs_fid fid; 2720 2721 if (!tcon->posix_extensions) 2722 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2723 2724 oparms = (struct cifs_open_parms) { 2725 .tcon = tcon, 2726 .path = "", 2727 .desired_access = FILE_READ_ATTRIBUTES, 2728 .disposition = FILE_OPEN, 2729 .create_options = cifs_create_options(cifs_sb, 0), 2730 .fid = &fid, 2731 }; 2732 2733 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2734 NULL, NULL); 2735 if (rc) 2736 return rc; 2737 2738 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2739 fid.volatile_fid, buf); 2740 buf->f_type = SMB2_SUPER_MAGIC; 2741 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2742 return rc; 2743 } 2744 2745 static bool 2746 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2747 { 2748 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2749 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2750 } 2751 2752 static int 2753 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2754 __u64 length, __u32 type, int lock, int unlock, bool wait) 2755 { 2756 if (unlock && !lock) 2757 type = SMB2_LOCKFLAG_UNLOCK; 2758 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2759 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2760 current->tgid, length, offset, type, wait); 2761 } 2762 2763 static void 2764 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2765 { 2766 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2767 } 2768 2769 static void 2770 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2771 { 2772 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2773 } 2774 2775 static void 2776 smb2_new_lease_key(struct cifs_fid *fid) 2777 { 2778 generate_random_uuid(fid->lease_key); 2779 } 2780 2781 static int 2782 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2783 const char *search_name, 2784 struct dfs_info3_param **target_nodes, 2785 unsigned int *num_of_nodes, 2786 const struct nls_table *nls_codepage, int remap) 2787 { 2788 int rc; 2789 __le16 *utf16_path = NULL; 2790 int utf16_path_len = 0; 2791 struct cifs_tcon *tcon; 2792 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2793 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2794 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2795 int retry_count = 0; 2796 2797 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2798 2799 /* 2800 * Try to use the IPC tcon, otherwise just use any 2801 */ 2802 tcon = ses->tcon_ipc; 2803 if (tcon == NULL) { 2804 spin_lock(&cifs_tcp_ses_lock); 2805 tcon = list_first_entry_or_null(&ses->tcon_list, 2806 struct cifs_tcon, 2807 tcon_list); 2808 if (tcon) 2809 tcon->tc_count++; 2810 spin_unlock(&cifs_tcp_ses_lock); 2811 } 2812 2813 if (tcon == NULL) { 2814 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2815 ses); 2816 rc = -ENOTCONN; 2817 goto out; 2818 } 2819 2820 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2821 &utf16_path_len, 2822 nls_codepage, remap); 2823 if (!utf16_path) { 2824 rc = -ENOMEM; 2825 goto out; 2826 } 2827 2828 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2829 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2830 if (!dfs_req) { 2831 rc = -ENOMEM; 2832 goto out; 2833 } 2834 2835 /* Highest DFS referral version understood */ 2836 dfs_req->MaxReferralLevel = DFS_VERSION; 2837 2838 /* Path to resolve in an UTF-16 null-terminated string */ 2839 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2840 2841 do { 2842 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2843 FSCTL_DFS_GET_REFERRALS, 2844 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2845 (char **)&dfs_rsp, &dfs_rsp_size); 2846 if (!is_retryable_error(rc)) 2847 break; 2848 usleep_range(512, 2048); 2849 } while (++retry_count < 5); 2850 2851 if (!rc && !dfs_rsp) 2852 rc = -EIO; 2853 if (rc) { 2854 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2855 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2856 goto out; 2857 } 2858 2859 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2860 num_of_nodes, target_nodes, 2861 nls_codepage, remap, search_name, 2862 true /* is_unicode */); 2863 if (rc) { 2864 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2865 goto out; 2866 } 2867 2868 out: 2869 if (tcon && !tcon->ipc) { 2870 /* ipc tcons are not refcounted */ 2871 spin_lock(&cifs_tcp_ses_lock); 2872 tcon->tc_count--; 2873 /* tc_count can never go negative */ 2874 WARN_ON(tcon->tc_count < 0); 2875 spin_unlock(&cifs_tcp_ses_lock); 2876 } 2877 kfree(utf16_path); 2878 kfree(dfs_req); 2879 kfree(dfs_rsp); 2880 return rc; 2881 } 2882 2883 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2884 static int parse_reparse_posix(struct reparse_posix_data *buf, 2885 struct cifs_sb_info *cifs_sb, 2886 struct cifs_open_info_data *data) 2887 { 2888 unsigned int len; 2889 u64 type; 2890 2891 switch ((type = le64_to_cpu(buf->InodeType))) { 2892 case NFS_SPECFILE_LNK: 2893 len = le16_to_cpu(buf->ReparseDataLength); 2894 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer, 2895 len, true, 2896 cifs_sb->local_nls); 2897 if (!data->symlink_target) 2898 return -ENOMEM; 2899 convert_delimiter(data->symlink_target, '/'); 2900 cifs_dbg(FYI, "%s: target path: %s\n", 2901 __func__, data->symlink_target); 2902 break; 2903 case NFS_SPECFILE_CHR: 2904 case NFS_SPECFILE_BLK: 2905 case NFS_SPECFILE_FIFO: 2906 case NFS_SPECFILE_SOCK: 2907 break; 2908 default: 2909 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n", 2910 __func__, type); 2911 return -EOPNOTSUPP; 2912 } 2913 return 0; 2914 } 2915 2916 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym, 2917 u32 plen, bool unicode, 2918 struct cifs_sb_info *cifs_sb, 2919 struct cifs_open_info_data *data) 2920 { 2921 unsigned int len; 2922 unsigned int offs; 2923 2924 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 2925 2926 offs = le16_to_cpu(sym->SubstituteNameOffset); 2927 len = le16_to_cpu(sym->SubstituteNameLength); 2928 if (offs + 20 > plen || offs + len + 20 > plen) { 2929 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 2930 return -EIO; 2931 } 2932 2933 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs, 2934 len, unicode, 2935 cifs_sb->local_nls); 2936 if (!data->symlink_target) 2937 return -ENOMEM; 2938 2939 convert_delimiter(data->symlink_target, '/'); 2940 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target); 2941 2942 return 0; 2943 } 2944 2945 int parse_reparse_point(struct reparse_data_buffer *buf, 2946 u32 plen, struct cifs_sb_info *cifs_sb, 2947 bool unicode, struct cifs_open_info_data *data) 2948 { 2949 data->reparse.buf = buf; 2950 2951 /* See MS-FSCC 2.1.2 */ 2952 switch (le32_to_cpu(buf->ReparseTag)) { 2953 case IO_REPARSE_TAG_NFS: 2954 return parse_reparse_posix((struct reparse_posix_data *)buf, 2955 cifs_sb, data); 2956 case IO_REPARSE_TAG_SYMLINK: 2957 return parse_reparse_symlink( 2958 (struct reparse_symlink_data_buffer *)buf, 2959 plen, unicode, cifs_sb, data); 2960 case IO_REPARSE_TAG_LX_SYMLINK: 2961 case IO_REPARSE_TAG_AF_UNIX: 2962 case IO_REPARSE_TAG_LX_FIFO: 2963 case IO_REPARSE_TAG_LX_CHR: 2964 case IO_REPARSE_TAG_LX_BLK: 2965 return 0; 2966 default: 2967 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n", 2968 __func__, le32_to_cpu(buf->ReparseTag)); 2969 return -EOPNOTSUPP; 2970 } 2971 } 2972 2973 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, 2974 struct kvec *rsp_iov, 2975 struct cifs_open_info_data *data) 2976 { 2977 struct reparse_data_buffer *buf; 2978 struct smb2_ioctl_rsp *io = rsp_iov->iov_base; 2979 u32 plen = le32_to_cpu(io->OutputCount); 2980 2981 buf = (struct reparse_data_buffer *)((u8 *)io + 2982 le32_to_cpu(io->OutputOffset)); 2983 return parse_reparse_point(buf, plen, cifs_sb, true, data); 2984 } 2985 2986 static struct cifs_ntsd * 2987 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 2988 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 2989 { 2990 struct cifs_ntsd *pntsd = NULL; 2991 unsigned int xid; 2992 int rc = -EOPNOTSUPP; 2993 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 2994 2995 if (IS_ERR(tlink)) 2996 return ERR_CAST(tlink); 2997 2998 xid = get_xid(); 2999 cifs_dbg(FYI, "trying to get acl\n"); 3000 3001 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3002 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3003 info); 3004 free_xid(xid); 3005 3006 cifs_put_tlink(tlink); 3007 3008 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3009 if (rc) 3010 return ERR_PTR(rc); 3011 return pntsd; 3012 3013 } 3014 3015 static struct cifs_ntsd * 3016 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3017 const char *path, u32 *pacllen, u32 info) 3018 { 3019 struct cifs_ntsd *pntsd = NULL; 3020 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3021 unsigned int xid; 3022 int rc; 3023 struct cifs_tcon *tcon; 3024 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3025 struct cifs_fid fid; 3026 struct cifs_open_parms oparms; 3027 __le16 *utf16_path; 3028 3029 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3030 if (IS_ERR(tlink)) 3031 return ERR_CAST(tlink); 3032 3033 tcon = tlink_tcon(tlink); 3034 xid = get_xid(); 3035 3036 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3037 if (!utf16_path) { 3038 rc = -ENOMEM; 3039 free_xid(xid); 3040 return ERR_PTR(rc); 3041 } 3042 3043 oparms = (struct cifs_open_parms) { 3044 .tcon = tcon, 3045 .path = path, 3046 .desired_access = READ_CONTROL, 3047 .disposition = FILE_OPEN, 3048 /* 3049 * When querying an ACL, even if the file is a symlink 3050 * we want to open the source not the target, and so 3051 * the protocol requires that the client specify this 3052 * flag when opening a reparse point 3053 */ 3054 .create_options = cifs_create_options(cifs_sb, 0) | 3055 OPEN_REPARSE_POINT, 3056 .fid = &fid, 3057 }; 3058 3059 if (info & SACL_SECINFO) 3060 oparms.desired_access |= SYSTEM_SECURITY; 3061 3062 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3063 NULL); 3064 kfree(utf16_path); 3065 if (!rc) { 3066 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3067 fid.volatile_fid, (void **)&pntsd, pacllen, 3068 info); 3069 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3070 } 3071 3072 cifs_put_tlink(tlink); 3073 free_xid(xid); 3074 3075 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3076 if (rc) 3077 return ERR_PTR(rc); 3078 return pntsd; 3079 } 3080 3081 static int 3082 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3083 struct inode *inode, const char *path, int aclflag) 3084 { 3085 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3086 unsigned int xid; 3087 int rc, access_flags = 0; 3088 struct cifs_tcon *tcon; 3089 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3090 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3091 struct cifs_fid fid; 3092 struct cifs_open_parms oparms; 3093 __le16 *utf16_path; 3094 3095 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3096 if (IS_ERR(tlink)) 3097 return PTR_ERR(tlink); 3098 3099 tcon = tlink_tcon(tlink); 3100 xid = get_xid(); 3101 3102 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3103 access_flags |= WRITE_OWNER; 3104 if (aclflag & CIFS_ACL_SACL) 3105 access_flags |= SYSTEM_SECURITY; 3106 if (aclflag & CIFS_ACL_DACL) 3107 access_flags |= WRITE_DAC; 3108 3109 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3110 if (!utf16_path) { 3111 rc = -ENOMEM; 3112 free_xid(xid); 3113 return rc; 3114 } 3115 3116 oparms = (struct cifs_open_parms) { 3117 .tcon = tcon, 3118 .desired_access = access_flags, 3119 .create_options = cifs_create_options(cifs_sb, 0), 3120 .disposition = FILE_OPEN, 3121 .path = path, 3122 .fid = &fid, 3123 }; 3124 3125 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3126 NULL, NULL); 3127 kfree(utf16_path); 3128 if (!rc) { 3129 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3130 fid.volatile_fid, pnntsd, acllen, aclflag); 3131 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3132 } 3133 3134 cifs_put_tlink(tlink); 3135 free_xid(xid); 3136 return rc; 3137 } 3138 3139 /* Retrieve an ACL from the server */ 3140 static struct cifs_ntsd * 3141 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3142 struct inode *inode, const char *path, 3143 u32 *pacllen, u32 info) 3144 { 3145 struct cifs_ntsd *pntsd = NULL; 3146 struct cifsFileInfo *open_file = NULL; 3147 3148 if (inode && !(info & SACL_SECINFO)) 3149 open_file = find_readable_file(CIFS_I(inode), true); 3150 if (!open_file || (info & SACL_SECINFO)) 3151 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3152 3153 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3154 cifsFileInfo_put(open_file); 3155 return pntsd; 3156 } 3157 3158 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3159 loff_t offset, loff_t len, unsigned int xid) 3160 { 3161 struct cifsFileInfo *cfile = file->private_data; 3162 struct file_zero_data_information fsctl_buf; 3163 3164 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3165 3166 fsctl_buf.FileOffset = cpu_to_le64(offset); 3167 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3168 3169 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3170 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3171 (char *)&fsctl_buf, 3172 sizeof(struct file_zero_data_information), 3173 0, NULL, NULL); 3174 } 3175 3176 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3177 loff_t offset, loff_t len, bool keep_size) 3178 { 3179 struct cifs_ses *ses = tcon->ses; 3180 struct inode *inode = file_inode(file); 3181 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3182 struct cifsFileInfo *cfile = file->private_data; 3183 unsigned long long new_size; 3184 long rc; 3185 unsigned int xid; 3186 3187 xid = get_xid(); 3188 3189 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3190 ses->Suid, offset, len); 3191 3192 inode_lock(inode); 3193 filemap_invalidate_lock(inode->i_mapping); 3194 3195 /* 3196 * We zero the range through ioctl, so we need remove the page caches 3197 * first, otherwise the data may be inconsistent with the server. 3198 */ 3199 truncate_pagecache_range(inode, offset, offset + len - 1); 3200 3201 /* if file not oplocked can't be sure whether asking to extend size */ 3202 rc = -EOPNOTSUPP; 3203 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3204 goto zero_range_exit; 3205 3206 rc = smb3_zero_data(file, tcon, offset, len, xid); 3207 if (rc < 0) 3208 goto zero_range_exit; 3209 3210 /* 3211 * do we also need to change the size of the file? 3212 */ 3213 new_size = offset + len; 3214 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3215 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3216 cfile->fid.volatile_fid, cfile->pid, new_size); 3217 if (rc >= 0) { 3218 truncate_setsize(inode, new_size); 3219 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3220 } 3221 } 3222 3223 zero_range_exit: 3224 filemap_invalidate_unlock(inode->i_mapping); 3225 inode_unlock(inode); 3226 free_xid(xid); 3227 if (rc) 3228 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3229 ses->Suid, offset, len, rc); 3230 else 3231 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3232 ses->Suid, offset, len); 3233 return rc; 3234 } 3235 3236 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3237 loff_t offset, loff_t len) 3238 { 3239 struct inode *inode = file_inode(file); 3240 struct cifsFileInfo *cfile = file->private_data; 3241 struct file_zero_data_information fsctl_buf; 3242 long rc; 3243 unsigned int xid; 3244 __u8 set_sparse = 1; 3245 3246 xid = get_xid(); 3247 3248 inode_lock(inode); 3249 /* Need to make file sparse, if not already, before freeing range. */ 3250 /* Consider adding equivalent for compressed since it could also work */ 3251 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3252 rc = -EOPNOTSUPP; 3253 goto out; 3254 } 3255 3256 filemap_invalidate_lock(inode->i_mapping); 3257 /* 3258 * We implement the punch hole through ioctl, so we need remove the page 3259 * caches first, otherwise the data may be inconsistent with the server. 3260 */ 3261 truncate_pagecache_range(inode, offset, offset + len - 1); 3262 3263 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3264 3265 fsctl_buf.FileOffset = cpu_to_le64(offset); 3266 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3267 3268 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3269 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3270 (char *)&fsctl_buf, 3271 sizeof(struct file_zero_data_information), 3272 CIFSMaxBufSize, NULL, NULL); 3273 filemap_invalidate_unlock(inode->i_mapping); 3274 out: 3275 inode_unlock(inode); 3276 free_xid(xid); 3277 return rc; 3278 } 3279 3280 static int smb3_simple_fallocate_write_range(unsigned int xid, 3281 struct cifs_tcon *tcon, 3282 struct cifsFileInfo *cfile, 3283 loff_t off, loff_t len, 3284 char *buf) 3285 { 3286 struct cifs_io_parms io_parms = {0}; 3287 int nbytes; 3288 int rc = 0; 3289 struct kvec iov[2]; 3290 3291 io_parms.netfid = cfile->fid.netfid; 3292 io_parms.pid = current->tgid; 3293 io_parms.tcon = tcon; 3294 io_parms.persistent_fid = cfile->fid.persistent_fid; 3295 io_parms.volatile_fid = cfile->fid.volatile_fid; 3296 3297 while (len) { 3298 io_parms.offset = off; 3299 io_parms.length = len; 3300 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3301 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3302 /* iov[0] is reserved for smb header */ 3303 iov[1].iov_base = buf; 3304 iov[1].iov_len = io_parms.length; 3305 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3306 if (rc) 3307 break; 3308 if (nbytes > len) 3309 return -EINVAL; 3310 buf += nbytes; 3311 off += nbytes; 3312 len -= nbytes; 3313 } 3314 return rc; 3315 } 3316 3317 static int smb3_simple_fallocate_range(unsigned int xid, 3318 struct cifs_tcon *tcon, 3319 struct cifsFileInfo *cfile, 3320 loff_t off, loff_t len) 3321 { 3322 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3323 u32 out_data_len; 3324 char *buf = NULL; 3325 loff_t l; 3326 int rc; 3327 3328 in_data.file_offset = cpu_to_le64(off); 3329 in_data.length = cpu_to_le64(len); 3330 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3331 cfile->fid.volatile_fid, 3332 FSCTL_QUERY_ALLOCATED_RANGES, 3333 (char *)&in_data, sizeof(in_data), 3334 1024 * sizeof(struct file_allocated_range_buffer), 3335 (char **)&out_data, &out_data_len); 3336 if (rc) 3337 goto out; 3338 3339 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3340 if (buf == NULL) { 3341 rc = -ENOMEM; 3342 goto out; 3343 } 3344 3345 tmp_data = out_data; 3346 while (len) { 3347 /* 3348 * The rest of the region is unmapped so write it all. 3349 */ 3350 if (out_data_len == 0) { 3351 rc = smb3_simple_fallocate_write_range(xid, tcon, 3352 cfile, off, len, buf); 3353 goto out; 3354 } 3355 3356 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3357 rc = -EINVAL; 3358 goto out; 3359 } 3360 3361 if (off < le64_to_cpu(tmp_data->file_offset)) { 3362 /* 3363 * We are at a hole. Write until the end of the region 3364 * or until the next allocated data, 3365 * whichever comes next. 3366 */ 3367 l = le64_to_cpu(tmp_data->file_offset) - off; 3368 if (len < l) 3369 l = len; 3370 rc = smb3_simple_fallocate_write_range(xid, tcon, 3371 cfile, off, l, buf); 3372 if (rc) 3373 goto out; 3374 off = off + l; 3375 len = len - l; 3376 if (len == 0) 3377 goto out; 3378 } 3379 /* 3380 * We are at a section of allocated data, just skip forward 3381 * until the end of the data or the end of the region 3382 * we are supposed to fallocate, whichever comes first. 3383 */ 3384 l = le64_to_cpu(tmp_data->length); 3385 if (len < l) 3386 l = len; 3387 off += l; 3388 len -= l; 3389 3390 tmp_data = &tmp_data[1]; 3391 out_data_len -= sizeof(struct file_allocated_range_buffer); 3392 } 3393 3394 out: 3395 kfree(out_data); 3396 kfree(buf); 3397 return rc; 3398 } 3399 3400 3401 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3402 loff_t off, loff_t len, bool keep_size) 3403 { 3404 struct inode *inode; 3405 struct cifsInodeInfo *cifsi; 3406 struct cifsFileInfo *cfile = file->private_data; 3407 long rc = -EOPNOTSUPP; 3408 unsigned int xid; 3409 loff_t new_eof; 3410 3411 xid = get_xid(); 3412 3413 inode = d_inode(cfile->dentry); 3414 cifsi = CIFS_I(inode); 3415 3416 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3417 tcon->ses->Suid, off, len); 3418 /* if file not oplocked can't be sure whether asking to extend size */ 3419 if (!CIFS_CACHE_READ(cifsi)) 3420 if (keep_size == false) { 3421 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3422 tcon->tid, tcon->ses->Suid, off, len, rc); 3423 free_xid(xid); 3424 return rc; 3425 } 3426 3427 /* 3428 * Extending the file 3429 */ 3430 if ((keep_size == false) && i_size_read(inode) < off + len) { 3431 rc = inode_newsize_ok(inode, off + len); 3432 if (rc) 3433 goto out; 3434 3435 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3436 smb2_set_sparse(xid, tcon, cfile, inode, false); 3437 3438 new_eof = off + len; 3439 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3440 cfile->fid.volatile_fid, cfile->pid, new_eof); 3441 if (rc == 0) { 3442 cifsi->server_eof = new_eof; 3443 cifs_setsize(inode, new_eof); 3444 cifs_truncate_page(inode->i_mapping, inode->i_size); 3445 truncate_setsize(inode, new_eof); 3446 } 3447 goto out; 3448 } 3449 3450 /* 3451 * Files are non-sparse by default so falloc may be a no-op 3452 * Must check if file sparse. If not sparse, and since we are not 3453 * extending then no need to do anything since file already allocated 3454 */ 3455 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3456 rc = 0; 3457 goto out; 3458 } 3459 3460 if (keep_size == true) { 3461 /* 3462 * We can not preallocate pages beyond the end of the file 3463 * in SMB2 3464 */ 3465 if (off >= i_size_read(inode)) { 3466 rc = 0; 3467 goto out; 3468 } 3469 /* 3470 * For fallocates that are partially beyond the end of file, 3471 * clamp len so we only fallocate up to the end of file. 3472 */ 3473 if (off + len > i_size_read(inode)) { 3474 len = i_size_read(inode) - off; 3475 } 3476 } 3477 3478 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3479 /* 3480 * At this point, we are trying to fallocate an internal 3481 * regions of a sparse file. Since smb2 does not have a 3482 * fallocate command we have two otions on how to emulate this. 3483 * We can either turn the entire file to become non-sparse 3484 * which we only do if the fallocate is for virtually 3485 * the whole file, or we can overwrite the region with zeroes 3486 * using SMB2_write, which could be prohibitevly expensive 3487 * if len is large. 3488 */ 3489 /* 3490 * We are only trying to fallocate a small region so 3491 * just write it with zero. 3492 */ 3493 if (len <= 1024 * 1024) { 3494 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3495 off, len); 3496 goto out; 3497 } 3498 3499 /* 3500 * Check if falloc starts within first few pages of file 3501 * and ends within a few pages of the end of file to 3502 * ensure that most of file is being forced to be 3503 * fallocated now. If so then setting whole file sparse 3504 * ie potentially making a few extra pages at the beginning 3505 * or end of the file non-sparse via set_sparse is harmless. 3506 */ 3507 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3508 rc = -EOPNOTSUPP; 3509 goto out; 3510 } 3511 } 3512 3513 smb2_set_sparse(xid, tcon, cfile, inode, false); 3514 rc = 0; 3515 3516 out: 3517 if (rc) 3518 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3519 tcon->ses->Suid, off, len, rc); 3520 else 3521 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3522 tcon->ses->Suid, off, len); 3523 3524 free_xid(xid); 3525 return rc; 3526 } 3527 3528 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3529 loff_t off, loff_t len) 3530 { 3531 int rc; 3532 unsigned int xid; 3533 struct inode *inode = file_inode(file); 3534 struct cifsFileInfo *cfile = file->private_data; 3535 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3536 loff_t old_eof, new_eof; 3537 3538 xid = get_xid(); 3539 3540 inode_lock(inode); 3541 3542 old_eof = i_size_read(inode); 3543 if ((off >= old_eof) || 3544 off + len >= old_eof) { 3545 rc = -EINVAL; 3546 goto out; 3547 } 3548 3549 filemap_invalidate_lock(inode->i_mapping); 3550 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3551 if (rc < 0) 3552 goto out_2; 3553 3554 truncate_pagecache_range(inode, off, old_eof); 3555 3556 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3557 old_eof - off - len, off); 3558 if (rc < 0) 3559 goto out_2; 3560 3561 new_eof = old_eof - len; 3562 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3563 cfile->fid.volatile_fid, cfile->pid, new_eof); 3564 if (rc < 0) 3565 goto out_2; 3566 3567 rc = 0; 3568 3569 cifsi->server_eof = i_size_read(inode) - len; 3570 truncate_setsize(inode, cifsi->server_eof); 3571 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3572 out_2: 3573 filemap_invalidate_unlock(inode->i_mapping); 3574 out: 3575 inode_unlock(inode); 3576 free_xid(xid); 3577 return rc; 3578 } 3579 3580 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3581 loff_t off, loff_t len) 3582 { 3583 int rc; 3584 unsigned int xid; 3585 struct cifsFileInfo *cfile = file->private_data; 3586 struct inode *inode = file_inode(file); 3587 __u64 count, old_eof, new_eof; 3588 3589 xid = get_xid(); 3590 3591 inode_lock(inode); 3592 3593 old_eof = i_size_read(inode); 3594 if (off >= old_eof) { 3595 rc = -EINVAL; 3596 goto out; 3597 } 3598 3599 count = old_eof - off; 3600 new_eof = old_eof + len; 3601 3602 filemap_invalidate_lock(inode->i_mapping); 3603 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3604 if (rc < 0) 3605 goto out_2; 3606 truncate_pagecache_range(inode, off, old_eof); 3607 3608 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3609 cfile->fid.volatile_fid, cfile->pid, new_eof); 3610 if (rc < 0) 3611 goto out_2; 3612 3613 truncate_setsize(inode, new_eof); 3614 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3615 3616 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3617 if (rc < 0) 3618 goto out_2; 3619 3620 rc = smb3_zero_data(file, tcon, off, len, xid); 3621 if (rc < 0) 3622 goto out_2; 3623 3624 rc = 0; 3625 out_2: 3626 filemap_invalidate_unlock(inode->i_mapping); 3627 out: 3628 inode_unlock(inode); 3629 free_xid(xid); 3630 return rc; 3631 } 3632 3633 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3634 { 3635 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3636 struct cifsInodeInfo *cifsi; 3637 struct inode *inode; 3638 int rc = 0; 3639 struct file_allocated_range_buffer in_data, *out_data = NULL; 3640 u32 out_data_len; 3641 unsigned int xid; 3642 3643 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3644 return generic_file_llseek(file, offset, whence); 3645 3646 inode = d_inode(cfile->dentry); 3647 cifsi = CIFS_I(inode); 3648 3649 if (offset < 0 || offset >= i_size_read(inode)) 3650 return -ENXIO; 3651 3652 xid = get_xid(); 3653 /* 3654 * We need to be sure that all dirty pages are written as they 3655 * might fill holes on the server. 3656 * Note that we also MUST flush any written pages since at least 3657 * some servers (Windows2016) will not reflect recent writes in 3658 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3659 */ 3660 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3661 if (wrcfile) { 3662 filemap_write_and_wait(inode->i_mapping); 3663 smb2_flush_file(xid, tcon, &wrcfile->fid); 3664 cifsFileInfo_put(wrcfile); 3665 } 3666 3667 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3668 if (whence == SEEK_HOLE) 3669 offset = i_size_read(inode); 3670 goto lseek_exit; 3671 } 3672 3673 in_data.file_offset = cpu_to_le64(offset); 3674 in_data.length = cpu_to_le64(i_size_read(inode)); 3675 3676 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3677 cfile->fid.volatile_fid, 3678 FSCTL_QUERY_ALLOCATED_RANGES, 3679 (char *)&in_data, sizeof(in_data), 3680 sizeof(struct file_allocated_range_buffer), 3681 (char **)&out_data, &out_data_len); 3682 if (rc == -E2BIG) 3683 rc = 0; 3684 if (rc) 3685 goto lseek_exit; 3686 3687 if (whence == SEEK_HOLE && out_data_len == 0) 3688 goto lseek_exit; 3689 3690 if (whence == SEEK_DATA && out_data_len == 0) { 3691 rc = -ENXIO; 3692 goto lseek_exit; 3693 } 3694 3695 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3696 rc = -EINVAL; 3697 goto lseek_exit; 3698 } 3699 if (whence == SEEK_DATA) { 3700 offset = le64_to_cpu(out_data->file_offset); 3701 goto lseek_exit; 3702 } 3703 if (offset < le64_to_cpu(out_data->file_offset)) 3704 goto lseek_exit; 3705 3706 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3707 3708 lseek_exit: 3709 free_xid(xid); 3710 kfree(out_data); 3711 if (!rc) 3712 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3713 else 3714 return rc; 3715 } 3716 3717 static int smb3_fiemap(struct cifs_tcon *tcon, 3718 struct cifsFileInfo *cfile, 3719 struct fiemap_extent_info *fei, u64 start, u64 len) 3720 { 3721 unsigned int xid; 3722 struct file_allocated_range_buffer in_data, *out_data; 3723 u32 out_data_len; 3724 int i, num, rc, flags, last_blob; 3725 u64 next; 3726 3727 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3728 if (rc) 3729 return rc; 3730 3731 xid = get_xid(); 3732 again: 3733 in_data.file_offset = cpu_to_le64(start); 3734 in_data.length = cpu_to_le64(len); 3735 3736 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3737 cfile->fid.volatile_fid, 3738 FSCTL_QUERY_ALLOCATED_RANGES, 3739 (char *)&in_data, sizeof(in_data), 3740 1024 * sizeof(struct file_allocated_range_buffer), 3741 (char **)&out_data, &out_data_len); 3742 if (rc == -E2BIG) { 3743 last_blob = 0; 3744 rc = 0; 3745 } else 3746 last_blob = 1; 3747 if (rc) 3748 goto out; 3749 3750 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3751 rc = -EINVAL; 3752 goto out; 3753 } 3754 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3755 rc = -EINVAL; 3756 goto out; 3757 } 3758 3759 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3760 for (i = 0; i < num; i++) { 3761 flags = 0; 3762 if (i == num - 1 && last_blob) 3763 flags |= FIEMAP_EXTENT_LAST; 3764 3765 rc = fiemap_fill_next_extent(fei, 3766 le64_to_cpu(out_data[i].file_offset), 3767 le64_to_cpu(out_data[i].file_offset), 3768 le64_to_cpu(out_data[i].length), 3769 flags); 3770 if (rc < 0) 3771 goto out; 3772 if (rc == 1) { 3773 rc = 0; 3774 goto out; 3775 } 3776 } 3777 3778 if (!last_blob) { 3779 next = le64_to_cpu(out_data[num - 1].file_offset) + 3780 le64_to_cpu(out_data[num - 1].length); 3781 len = len - (next - start); 3782 start = next; 3783 goto again; 3784 } 3785 3786 out: 3787 free_xid(xid); 3788 kfree(out_data); 3789 return rc; 3790 } 3791 3792 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3793 loff_t off, loff_t len) 3794 { 3795 /* KEEP_SIZE already checked for by do_fallocate */ 3796 if (mode & FALLOC_FL_PUNCH_HOLE) 3797 return smb3_punch_hole(file, tcon, off, len); 3798 else if (mode & FALLOC_FL_ZERO_RANGE) { 3799 if (mode & FALLOC_FL_KEEP_SIZE) 3800 return smb3_zero_range(file, tcon, off, len, true); 3801 return smb3_zero_range(file, tcon, off, len, false); 3802 } else if (mode == FALLOC_FL_KEEP_SIZE) 3803 return smb3_simple_falloc(file, tcon, off, len, true); 3804 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3805 return smb3_collapse_range(file, tcon, off, len); 3806 else if (mode == FALLOC_FL_INSERT_RANGE) 3807 return smb3_insert_range(file, tcon, off, len); 3808 else if (mode == 0) 3809 return smb3_simple_falloc(file, tcon, off, len, false); 3810 3811 return -EOPNOTSUPP; 3812 } 3813 3814 static void 3815 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3816 struct cifsInodeInfo *cinode, __u32 oplock, 3817 unsigned int epoch, bool *purge_cache) 3818 { 3819 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3820 } 3821 3822 static void 3823 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3824 unsigned int epoch, bool *purge_cache); 3825 3826 static void 3827 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3828 struct cifsInodeInfo *cinode, __u32 oplock, 3829 unsigned int epoch, bool *purge_cache) 3830 { 3831 unsigned int old_state = cinode->oplock; 3832 unsigned int old_epoch = cinode->epoch; 3833 unsigned int new_state; 3834 3835 if (epoch > old_epoch) { 3836 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3837 cinode->epoch = epoch; 3838 } 3839 3840 new_state = cinode->oplock; 3841 *purge_cache = false; 3842 3843 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3844 (new_state & CIFS_CACHE_READ_FLG) == 0) 3845 *purge_cache = true; 3846 else if (old_state == new_state && (epoch - old_epoch > 1)) 3847 *purge_cache = true; 3848 } 3849 3850 static void 3851 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3852 unsigned int epoch, bool *purge_cache) 3853 { 3854 oplock &= 0xFF; 3855 cinode->lease_granted = false; 3856 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3857 return; 3858 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3859 cinode->oplock = CIFS_CACHE_RHW_FLG; 3860 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3861 &cinode->netfs.inode); 3862 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3863 cinode->oplock = CIFS_CACHE_RW_FLG; 3864 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3865 &cinode->netfs.inode); 3866 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3867 cinode->oplock = CIFS_CACHE_READ_FLG; 3868 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3869 &cinode->netfs.inode); 3870 } else 3871 cinode->oplock = 0; 3872 } 3873 3874 static void 3875 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3876 unsigned int epoch, bool *purge_cache) 3877 { 3878 char message[5] = {0}; 3879 unsigned int new_oplock = 0; 3880 3881 oplock &= 0xFF; 3882 cinode->lease_granted = true; 3883 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3884 return; 3885 3886 /* Check if the server granted an oplock rather than a lease */ 3887 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3888 return smb2_set_oplock_level(cinode, oplock, epoch, 3889 purge_cache); 3890 3891 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3892 new_oplock |= CIFS_CACHE_READ_FLG; 3893 strcat(message, "R"); 3894 } 3895 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3896 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3897 strcat(message, "H"); 3898 } 3899 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3900 new_oplock |= CIFS_CACHE_WRITE_FLG; 3901 strcat(message, "W"); 3902 } 3903 if (!new_oplock) 3904 strncpy(message, "None", sizeof(message)); 3905 3906 cinode->oplock = new_oplock; 3907 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3908 &cinode->netfs.inode); 3909 } 3910 3911 static void 3912 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3913 unsigned int epoch, bool *purge_cache) 3914 { 3915 unsigned int old_oplock = cinode->oplock; 3916 3917 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3918 3919 if (purge_cache) { 3920 *purge_cache = false; 3921 if (old_oplock == CIFS_CACHE_READ_FLG) { 3922 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3923 (epoch - cinode->epoch > 0)) 3924 *purge_cache = true; 3925 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3926 (epoch - cinode->epoch > 1)) 3927 *purge_cache = true; 3928 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3929 (epoch - cinode->epoch > 1)) 3930 *purge_cache = true; 3931 else if (cinode->oplock == 0 && 3932 (epoch - cinode->epoch > 0)) 3933 *purge_cache = true; 3934 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3935 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3936 (epoch - cinode->epoch > 0)) 3937 *purge_cache = true; 3938 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3939 (epoch - cinode->epoch > 1)) 3940 *purge_cache = true; 3941 } 3942 cinode->epoch = epoch; 3943 } 3944 } 3945 3946 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3947 static bool 3948 smb2_is_read_op(__u32 oplock) 3949 { 3950 return oplock == SMB2_OPLOCK_LEVEL_II; 3951 } 3952 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 3953 3954 static bool 3955 smb21_is_read_op(__u32 oplock) 3956 { 3957 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 3958 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 3959 } 3960 3961 static __le32 3962 map_oplock_to_lease(u8 oplock) 3963 { 3964 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3965 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 3966 else if (oplock == SMB2_OPLOCK_LEVEL_II) 3967 return SMB2_LEASE_READ_CACHING_LE; 3968 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 3969 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 3970 SMB2_LEASE_WRITE_CACHING_LE; 3971 return 0; 3972 } 3973 3974 static char * 3975 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 3976 { 3977 struct create_lease *buf; 3978 3979 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 3980 if (!buf) 3981 return NULL; 3982 3983 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 3984 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 3985 3986 buf->ccontext.DataOffset = cpu_to_le16(offsetof 3987 (struct create_lease, lcontext)); 3988 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 3989 buf->ccontext.NameOffset = cpu_to_le16(offsetof 3990 (struct create_lease, Name)); 3991 buf->ccontext.NameLength = cpu_to_le16(4); 3992 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 3993 buf->Name[0] = 'R'; 3994 buf->Name[1] = 'q'; 3995 buf->Name[2] = 'L'; 3996 buf->Name[3] = 's'; 3997 return (char *)buf; 3998 } 3999 4000 static char * 4001 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4002 { 4003 struct create_lease_v2 *buf; 4004 4005 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4006 if (!buf) 4007 return NULL; 4008 4009 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4010 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4011 4012 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4013 (struct create_lease_v2, lcontext)); 4014 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4015 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4016 (struct create_lease_v2, Name)); 4017 buf->ccontext.NameLength = cpu_to_le16(4); 4018 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4019 buf->Name[0] = 'R'; 4020 buf->Name[1] = 'q'; 4021 buf->Name[2] = 'L'; 4022 buf->Name[3] = 's'; 4023 return (char *)buf; 4024 } 4025 4026 static __u8 4027 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4028 { 4029 struct create_lease *lc = (struct create_lease *)buf; 4030 4031 *epoch = 0; /* not used */ 4032 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4033 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4034 return le32_to_cpu(lc->lcontext.LeaseState); 4035 } 4036 4037 static __u8 4038 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4039 { 4040 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4041 4042 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4043 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4044 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4045 if (lease_key) 4046 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4047 return le32_to_cpu(lc->lcontext.LeaseState); 4048 } 4049 4050 static unsigned int 4051 smb2_wp_retry_size(struct inode *inode) 4052 { 4053 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4054 SMB2_MAX_BUFFER_SIZE); 4055 } 4056 4057 static bool 4058 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4059 { 4060 return !cfile->invalidHandle; 4061 } 4062 4063 static void 4064 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4065 struct smb_rqst *old_rq, __le16 cipher_type) 4066 { 4067 struct smb2_hdr *shdr = 4068 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4069 4070 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4071 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4072 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4073 tr_hdr->Flags = cpu_to_le16(0x01); 4074 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4075 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4076 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4077 else 4078 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4079 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4080 } 4081 4082 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4083 int num_rqst, const u8 *sig, u8 **iv, 4084 struct aead_request **req, struct sg_table *sgt, 4085 unsigned int *num_sgs, size_t *sensitive_size) 4086 { 4087 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4088 unsigned int iv_size = crypto_aead_ivsize(tfm); 4089 unsigned int len; 4090 u8 *p; 4091 4092 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4093 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4094 return ERR_PTR(*num_sgs); 4095 4096 len = iv_size; 4097 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4098 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4099 len += req_size; 4100 len = ALIGN(len, __alignof__(struct scatterlist)); 4101 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4102 *sensitive_size = len; 4103 4104 p = kvzalloc(len, GFP_NOFS); 4105 if (!p) 4106 return ERR_PTR(-ENOMEM); 4107 4108 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4109 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4110 crypto_tfm_ctx_alignment()); 4111 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4112 __alignof__(struct scatterlist)); 4113 return p; 4114 } 4115 4116 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4117 int num_rqst, const u8 *sig, u8 **iv, 4118 struct aead_request **req, struct scatterlist **sgl, 4119 size_t *sensitive_size) 4120 { 4121 struct sg_table sgtable = {}; 4122 unsigned int skip, num_sgs, i, j; 4123 ssize_t rc; 4124 void *p; 4125 4126 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4127 &num_sgs, sensitive_size); 4128 if (IS_ERR(p)) 4129 return ERR_CAST(p); 4130 4131 sg_init_marker(sgtable.sgl, num_sgs); 4132 4133 /* 4134 * The first rqst has a transform header where the 4135 * first 20 bytes are not part of the encrypted blob. 4136 */ 4137 skip = 20; 4138 4139 for (i = 0; i < num_rqst; i++) { 4140 struct iov_iter *iter = &rqst[i].rq_iter; 4141 size_t count = iov_iter_count(iter); 4142 4143 for (j = 0; j < rqst[i].rq_nvec; j++) { 4144 cifs_sg_set_buf(&sgtable, 4145 rqst[i].rq_iov[j].iov_base + skip, 4146 rqst[i].rq_iov[j].iov_len - skip); 4147 4148 /* See the above comment on the 'skip' assignment */ 4149 skip = 0; 4150 } 4151 sgtable.orig_nents = sgtable.nents; 4152 4153 rc = extract_iter_to_sg(iter, count, &sgtable, 4154 num_sgs - sgtable.nents, 0); 4155 iov_iter_revert(iter, rc); 4156 sgtable.orig_nents = sgtable.nents; 4157 } 4158 4159 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4160 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4161 *sgl = sgtable.sgl; 4162 return p; 4163 } 4164 4165 static int 4166 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4167 { 4168 struct TCP_Server_Info *pserver; 4169 struct cifs_ses *ses; 4170 u8 *ses_enc_key; 4171 4172 /* If server is a channel, select the primary channel */ 4173 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4174 4175 spin_lock(&cifs_tcp_ses_lock); 4176 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4177 if (ses->Suid == ses_id) { 4178 spin_lock(&ses->ses_lock); 4179 ses_enc_key = enc ? ses->smb3encryptionkey : 4180 ses->smb3decryptionkey; 4181 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4182 spin_unlock(&ses->ses_lock); 4183 spin_unlock(&cifs_tcp_ses_lock); 4184 return 0; 4185 } 4186 } 4187 spin_unlock(&cifs_tcp_ses_lock); 4188 4189 trace_smb3_ses_not_found(ses_id); 4190 4191 return -EAGAIN; 4192 } 4193 /* 4194 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4195 * iov[0] - transform header (associate data), 4196 * iov[1-N] - SMB2 header and pages - data to encrypt. 4197 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4198 * untouched. 4199 */ 4200 static int 4201 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4202 struct smb_rqst *rqst, int enc) 4203 { 4204 struct smb2_transform_hdr *tr_hdr = 4205 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4206 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4207 int rc = 0; 4208 struct scatterlist *sg; 4209 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4210 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4211 struct aead_request *req; 4212 u8 *iv; 4213 DECLARE_CRYPTO_WAIT(wait); 4214 struct crypto_aead *tfm; 4215 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4216 void *creq; 4217 size_t sensitive_size; 4218 4219 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4220 if (rc) { 4221 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4222 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4223 return rc; 4224 } 4225 4226 rc = smb3_crypto_aead_allocate(server); 4227 if (rc) { 4228 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4229 return rc; 4230 } 4231 4232 tfm = enc ? server->secmech.enc : server->secmech.dec; 4233 4234 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4235 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4236 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4237 else 4238 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4239 4240 if (rc) { 4241 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4242 return rc; 4243 } 4244 4245 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4246 if (rc) { 4247 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4248 return rc; 4249 } 4250 4251 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4252 &sensitive_size); 4253 if (IS_ERR(creq)) 4254 return PTR_ERR(creq); 4255 4256 if (!enc) { 4257 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4258 crypt_len += SMB2_SIGNATURE_SIZE; 4259 } 4260 4261 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4262 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4263 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4264 else { 4265 iv[0] = 3; 4266 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4267 } 4268 4269 aead_request_set_tfm(req, tfm); 4270 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4271 aead_request_set_ad(req, assoc_data_len); 4272 4273 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4274 crypto_req_done, &wait); 4275 4276 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4277 : crypto_aead_decrypt(req), &wait); 4278 4279 if (!rc && enc) 4280 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4281 4282 kvfree_sensitive(creq, sensitive_size); 4283 return rc; 4284 } 4285 4286 /* 4287 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4288 */ 4289 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4290 { 4291 struct folio *folio; 4292 4293 XA_STATE(xas, buffer, 0); 4294 4295 rcu_read_lock(); 4296 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4297 folio_put(folio); 4298 } 4299 rcu_read_unlock(); 4300 xa_destroy(buffer); 4301 } 4302 4303 void 4304 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4305 { 4306 int i; 4307 4308 for (i = 0; i < num_rqst; i++) 4309 if (!xa_empty(&rqst[i].rq_buffer)) 4310 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4311 } 4312 4313 /* 4314 * This function will initialize new_rq and encrypt the content. 4315 * The first entry, new_rq[0], only contains a single iov which contains 4316 * a smb2_transform_hdr and is pre-allocated by the caller. 4317 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4318 * 4319 * The end result is an array of smb_rqst structures where the first structure 4320 * only contains a single iov for the transform header which we then can pass 4321 * to crypt_message(). 4322 * 4323 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4324 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4325 */ 4326 static int 4327 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4328 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4329 { 4330 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4331 struct page *page; 4332 unsigned int orig_len = 0; 4333 int i, j; 4334 int rc = -ENOMEM; 4335 4336 for (i = 1; i < num_rqst; i++) { 4337 struct smb_rqst *old = &old_rq[i - 1]; 4338 struct smb_rqst *new = &new_rq[i]; 4339 struct xarray *buffer = &new->rq_buffer; 4340 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4341 4342 orig_len += smb_rqst_len(server, old); 4343 new->rq_iov = old->rq_iov; 4344 new->rq_nvec = old->rq_nvec; 4345 4346 xa_init(buffer); 4347 4348 if (size > 0) { 4349 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4350 4351 for (j = 0; j < npages; j++) { 4352 void *o; 4353 4354 rc = -ENOMEM; 4355 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4356 if (!page) 4357 goto err_free; 4358 page->index = j; 4359 o = xa_store(buffer, j, page, GFP_KERNEL); 4360 if (xa_is_err(o)) { 4361 rc = xa_err(o); 4362 put_page(page); 4363 goto err_free; 4364 } 4365 4366 xa_set_mark(buffer, j, XA_MARK_0); 4367 4368 seg = min_t(size_t, size - copied, PAGE_SIZE); 4369 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4370 rc = -EFAULT; 4371 goto err_free; 4372 } 4373 copied += seg; 4374 } 4375 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4376 buffer, 0, size); 4377 new->rq_iter_size = size; 4378 } 4379 } 4380 4381 /* fill the 1st iov with a transform header */ 4382 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4383 4384 rc = crypt_message(server, num_rqst, new_rq, 1); 4385 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4386 if (rc) 4387 goto err_free; 4388 4389 return rc; 4390 4391 err_free: 4392 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4393 return rc; 4394 } 4395 4396 static int 4397 smb3_is_transform_hdr(void *buf) 4398 { 4399 struct smb2_transform_hdr *trhdr = buf; 4400 4401 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4402 } 4403 4404 static int 4405 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4406 unsigned int buf_data_size, struct iov_iter *iter, 4407 bool is_offloaded) 4408 { 4409 struct kvec iov[2]; 4410 struct smb_rqst rqst = {NULL}; 4411 size_t iter_size = 0; 4412 int rc; 4413 4414 iov[0].iov_base = buf; 4415 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4416 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4417 iov[1].iov_len = buf_data_size; 4418 4419 rqst.rq_iov = iov; 4420 rqst.rq_nvec = 2; 4421 if (iter) { 4422 rqst.rq_iter = *iter; 4423 rqst.rq_iter_size = iov_iter_count(iter); 4424 iter_size = iov_iter_count(iter); 4425 } 4426 4427 rc = crypt_message(server, 1, &rqst, 0); 4428 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4429 4430 if (rc) 4431 return rc; 4432 4433 memmove(buf, iov[1].iov_base, buf_data_size); 4434 4435 if (!is_offloaded) 4436 server->total_read = buf_data_size + iter_size; 4437 4438 return rc; 4439 } 4440 4441 static int 4442 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4443 unsigned int skip, struct iov_iter *iter) 4444 { 4445 struct page *page; 4446 unsigned long index; 4447 4448 xa_for_each(pages, index, page) { 4449 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4450 4451 n = copy_page_to_iter(page, skip, len, iter); 4452 if (n != len) { 4453 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4454 return -EIO; 4455 } 4456 data_size -= n; 4457 skip = 0; 4458 } 4459 4460 return 0; 4461 } 4462 4463 static int 4464 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4465 char *buf, unsigned int buf_len, struct xarray *pages, 4466 unsigned int pages_len, bool is_offloaded) 4467 { 4468 unsigned int data_offset; 4469 unsigned int data_len; 4470 unsigned int cur_off; 4471 unsigned int cur_page_idx; 4472 unsigned int pad_len; 4473 struct cifs_readdata *rdata = mid->callback_data; 4474 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4475 int length; 4476 bool use_rdma_mr = false; 4477 4478 if (shdr->Command != SMB2_READ) { 4479 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4480 return -EOPNOTSUPP; 4481 } 4482 4483 if (server->ops->is_session_expired && 4484 server->ops->is_session_expired(buf)) { 4485 if (!is_offloaded) 4486 cifs_reconnect(server, true); 4487 return -1; 4488 } 4489 4490 if (server->ops->is_status_pending && 4491 server->ops->is_status_pending(buf, server)) 4492 return -1; 4493 4494 /* set up first two iov to get credits */ 4495 rdata->iov[0].iov_base = buf; 4496 rdata->iov[0].iov_len = 0; 4497 rdata->iov[1].iov_base = buf; 4498 rdata->iov[1].iov_len = 4499 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4500 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4501 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4502 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4503 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4504 4505 rdata->result = server->ops->map_error(buf, true); 4506 if (rdata->result != 0) { 4507 cifs_dbg(FYI, "%s: server returned error %d\n", 4508 __func__, rdata->result); 4509 /* normal error on read response */ 4510 if (is_offloaded) 4511 mid->mid_state = MID_RESPONSE_RECEIVED; 4512 else 4513 dequeue_mid(mid, false); 4514 return 0; 4515 } 4516 4517 data_offset = server->ops->read_data_offset(buf); 4518 #ifdef CONFIG_CIFS_SMB_DIRECT 4519 use_rdma_mr = rdata->mr; 4520 #endif 4521 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4522 4523 if (data_offset < server->vals->read_rsp_size) { 4524 /* 4525 * win2k8 sometimes sends an offset of 0 when the read 4526 * is beyond the EOF. Treat it as if the data starts just after 4527 * the header. 4528 */ 4529 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4530 __func__, data_offset); 4531 data_offset = server->vals->read_rsp_size; 4532 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4533 /* data_offset is beyond the end of smallbuf */ 4534 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4535 __func__, data_offset); 4536 rdata->result = -EIO; 4537 if (is_offloaded) 4538 mid->mid_state = MID_RESPONSE_MALFORMED; 4539 else 4540 dequeue_mid(mid, rdata->result); 4541 return 0; 4542 } 4543 4544 pad_len = data_offset - server->vals->read_rsp_size; 4545 4546 if (buf_len <= data_offset) { 4547 /* read response payload is in pages */ 4548 cur_page_idx = pad_len / PAGE_SIZE; 4549 cur_off = pad_len % PAGE_SIZE; 4550 4551 if (cur_page_idx != 0) { 4552 /* data offset is beyond the 1st page of response */ 4553 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4554 __func__, data_offset); 4555 rdata->result = -EIO; 4556 if (is_offloaded) 4557 mid->mid_state = MID_RESPONSE_MALFORMED; 4558 else 4559 dequeue_mid(mid, rdata->result); 4560 return 0; 4561 } 4562 4563 if (data_len > pages_len - pad_len) { 4564 /* data_len is corrupt -- discard frame */ 4565 rdata->result = -EIO; 4566 if (is_offloaded) 4567 mid->mid_state = MID_RESPONSE_MALFORMED; 4568 else 4569 dequeue_mid(mid, rdata->result); 4570 return 0; 4571 } 4572 4573 /* Copy the data to the output I/O iterator. */ 4574 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4575 cur_off, &rdata->iter); 4576 if (rdata->result != 0) { 4577 if (is_offloaded) 4578 mid->mid_state = MID_RESPONSE_MALFORMED; 4579 else 4580 dequeue_mid(mid, rdata->result); 4581 return 0; 4582 } 4583 rdata->got_bytes = pages_len; 4584 4585 } else if (buf_len >= data_offset + data_len) { 4586 /* read response payload is in buf */ 4587 WARN_ONCE(pages && !xa_empty(pages), 4588 "read data can be either in buf or in pages"); 4589 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4590 if (length < 0) 4591 return length; 4592 rdata->got_bytes = data_len; 4593 } else { 4594 /* read response payload cannot be in both buf and pages */ 4595 WARN_ONCE(1, "buf can not contain only a part of read data"); 4596 rdata->result = -EIO; 4597 if (is_offloaded) 4598 mid->mid_state = MID_RESPONSE_MALFORMED; 4599 else 4600 dequeue_mid(mid, rdata->result); 4601 return 0; 4602 } 4603 4604 if (is_offloaded) 4605 mid->mid_state = MID_RESPONSE_RECEIVED; 4606 else 4607 dequeue_mid(mid, false); 4608 return 0; 4609 } 4610 4611 struct smb2_decrypt_work { 4612 struct work_struct decrypt; 4613 struct TCP_Server_Info *server; 4614 struct xarray buffer; 4615 char *buf; 4616 unsigned int len; 4617 }; 4618 4619 4620 static void smb2_decrypt_offload(struct work_struct *work) 4621 { 4622 struct smb2_decrypt_work *dw = container_of(work, 4623 struct smb2_decrypt_work, decrypt); 4624 int rc; 4625 struct mid_q_entry *mid; 4626 struct iov_iter iter; 4627 4628 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4629 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4630 &iter, true); 4631 if (rc) { 4632 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4633 goto free_pages; 4634 } 4635 4636 dw->server->lstrp = jiffies; 4637 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4638 if (mid == NULL) 4639 cifs_dbg(FYI, "mid not found\n"); 4640 else { 4641 mid->decrypted = true; 4642 rc = handle_read_data(dw->server, mid, dw->buf, 4643 dw->server->vals->read_rsp_size, 4644 &dw->buffer, dw->len, 4645 true); 4646 if (rc >= 0) { 4647 #ifdef CONFIG_CIFS_STATS2 4648 mid->when_received = jiffies; 4649 #endif 4650 if (dw->server->ops->is_network_name_deleted) 4651 dw->server->ops->is_network_name_deleted(dw->buf, 4652 dw->server); 4653 4654 mid->callback(mid); 4655 } else { 4656 spin_lock(&dw->server->srv_lock); 4657 if (dw->server->tcpStatus == CifsNeedReconnect) { 4658 spin_lock(&dw->server->mid_lock); 4659 mid->mid_state = MID_RETRY_NEEDED; 4660 spin_unlock(&dw->server->mid_lock); 4661 spin_unlock(&dw->server->srv_lock); 4662 mid->callback(mid); 4663 } else { 4664 spin_lock(&dw->server->mid_lock); 4665 mid->mid_state = MID_REQUEST_SUBMITTED; 4666 mid->mid_flags &= ~(MID_DELETED); 4667 list_add_tail(&mid->qhead, 4668 &dw->server->pending_mid_q); 4669 spin_unlock(&dw->server->mid_lock); 4670 spin_unlock(&dw->server->srv_lock); 4671 } 4672 } 4673 release_mid(mid); 4674 } 4675 4676 free_pages: 4677 cifs_clear_xarray_buffer(&dw->buffer); 4678 cifs_small_buf_release(dw->buf); 4679 kfree(dw); 4680 } 4681 4682 4683 static int 4684 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4685 int *num_mids) 4686 { 4687 struct page *page; 4688 char *buf = server->smallbuf; 4689 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4690 struct iov_iter iter; 4691 unsigned int len, npages; 4692 unsigned int buflen = server->pdu_size; 4693 int rc; 4694 int i = 0; 4695 struct smb2_decrypt_work *dw; 4696 4697 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4698 if (!dw) 4699 return -ENOMEM; 4700 xa_init(&dw->buffer); 4701 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4702 dw->server = server; 4703 4704 *num_mids = 1; 4705 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4706 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4707 4708 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4709 if (rc < 0) 4710 goto free_dw; 4711 server->total_read += rc; 4712 4713 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4714 server->vals->read_rsp_size; 4715 dw->len = len; 4716 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4717 4718 rc = -ENOMEM; 4719 for (; i < npages; i++) { 4720 void *old; 4721 4722 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4723 if (!page) 4724 goto discard_data; 4725 page->index = i; 4726 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4727 if (xa_is_err(old)) { 4728 rc = xa_err(old); 4729 put_page(page); 4730 goto discard_data; 4731 } 4732 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4733 } 4734 4735 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4736 4737 /* Read the data into the buffer and clear excess bufferage. */ 4738 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4739 if (rc < 0) 4740 goto discard_data; 4741 4742 server->total_read += rc; 4743 if (rc < npages * PAGE_SIZE) 4744 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4745 iov_iter_revert(&iter, npages * PAGE_SIZE); 4746 iov_iter_truncate(&iter, dw->len); 4747 4748 rc = cifs_discard_remaining_data(server); 4749 if (rc) 4750 goto free_pages; 4751 4752 /* 4753 * For large reads, offload to different thread for better performance, 4754 * use more cores decrypting which can be expensive 4755 */ 4756 4757 if ((server->min_offload) && (server->in_flight > 1) && 4758 (server->pdu_size >= server->min_offload)) { 4759 dw->buf = server->smallbuf; 4760 server->smallbuf = (char *)cifs_small_buf_get(); 4761 4762 queue_work(decrypt_wq, &dw->decrypt); 4763 *num_mids = 0; /* worker thread takes care of finding mid */ 4764 return -1; 4765 } 4766 4767 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4768 &iter, false); 4769 if (rc) 4770 goto free_pages; 4771 4772 *mid = smb2_find_mid(server, buf); 4773 if (*mid == NULL) { 4774 cifs_dbg(FYI, "mid not found\n"); 4775 } else { 4776 cifs_dbg(FYI, "mid found\n"); 4777 (*mid)->decrypted = true; 4778 rc = handle_read_data(server, *mid, buf, 4779 server->vals->read_rsp_size, 4780 &dw->buffer, dw->len, false); 4781 if (rc >= 0) { 4782 if (server->ops->is_network_name_deleted) { 4783 server->ops->is_network_name_deleted(buf, 4784 server); 4785 } 4786 } 4787 } 4788 4789 free_pages: 4790 cifs_clear_xarray_buffer(&dw->buffer); 4791 free_dw: 4792 kfree(dw); 4793 return rc; 4794 discard_data: 4795 cifs_discard_remaining_data(server); 4796 goto free_pages; 4797 } 4798 4799 static int 4800 receive_encrypted_standard(struct TCP_Server_Info *server, 4801 struct mid_q_entry **mids, char **bufs, 4802 int *num_mids) 4803 { 4804 int ret, length; 4805 char *buf = server->smallbuf; 4806 struct smb2_hdr *shdr; 4807 unsigned int pdu_length = server->pdu_size; 4808 unsigned int buf_size; 4809 unsigned int next_cmd; 4810 struct mid_q_entry *mid_entry; 4811 int next_is_large; 4812 char *next_buffer = NULL; 4813 4814 *num_mids = 0; 4815 4816 /* switch to large buffer if too big for a small one */ 4817 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4818 server->large_buf = true; 4819 memcpy(server->bigbuf, buf, server->total_read); 4820 buf = server->bigbuf; 4821 } 4822 4823 /* now read the rest */ 4824 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4825 pdu_length - HEADER_SIZE(server) + 1); 4826 if (length < 0) 4827 return length; 4828 server->total_read += length; 4829 4830 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4831 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4832 if (length) 4833 return length; 4834 4835 next_is_large = server->large_buf; 4836 one_more: 4837 shdr = (struct smb2_hdr *)buf; 4838 next_cmd = le32_to_cpu(shdr->NextCommand); 4839 if (next_cmd) { 4840 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4841 return -1; 4842 if (next_is_large) 4843 next_buffer = (char *)cifs_buf_get(); 4844 else 4845 next_buffer = (char *)cifs_small_buf_get(); 4846 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4847 } 4848 4849 mid_entry = smb2_find_mid(server, buf); 4850 if (mid_entry == NULL) 4851 cifs_dbg(FYI, "mid not found\n"); 4852 else { 4853 cifs_dbg(FYI, "mid found\n"); 4854 mid_entry->decrypted = true; 4855 mid_entry->resp_buf_size = server->pdu_size; 4856 } 4857 4858 if (*num_mids >= MAX_COMPOUND) { 4859 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4860 return -1; 4861 } 4862 bufs[*num_mids] = buf; 4863 mids[(*num_mids)++] = mid_entry; 4864 4865 if (mid_entry && mid_entry->handle) 4866 ret = mid_entry->handle(server, mid_entry); 4867 else 4868 ret = cifs_handle_standard(server, mid_entry); 4869 4870 if (ret == 0 && next_cmd) { 4871 pdu_length -= next_cmd; 4872 server->large_buf = next_is_large; 4873 if (next_is_large) 4874 server->bigbuf = buf = next_buffer; 4875 else 4876 server->smallbuf = buf = next_buffer; 4877 goto one_more; 4878 } else if (ret != 0) { 4879 /* 4880 * ret != 0 here means that we didn't get to handle_mid() thus 4881 * server->smallbuf and server->bigbuf are still valid. We need 4882 * to free next_buffer because it is not going to be used 4883 * anywhere. 4884 */ 4885 if (next_is_large) 4886 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4887 else 4888 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4889 } 4890 4891 return ret; 4892 } 4893 4894 static int 4895 smb3_receive_transform(struct TCP_Server_Info *server, 4896 struct mid_q_entry **mids, char **bufs, int *num_mids) 4897 { 4898 char *buf = server->smallbuf; 4899 unsigned int pdu_length = server->pdu_size; 4900 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4901 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4902 4903 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4904 sizeof(struct smb2_hdr)) { 4905 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4906 pdu_length); 4907 cifs_reconnect(server, true); 4908 return -ECONNABORTED; 4909 } 4910 4911 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4912 cifs_server_dbg(VFS, "Transform message is broken\n"); 4913 cifs_reconnect(server, true); 4914 return -ECONNABORTED; 4915 } 4916 4917 /* TODO: add support for compounds containing READ. */ 4918 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4919 return receive_encrypted_read(server, &mids[0], num_mids); 4920 } 4921 4922 return receive_encrypted_standard(server, mids, bufs, num_mids); 4923 } 4924 4925 int 4926 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4927 { 4928 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4929 4930 return handle_read_data(server, mid, buf, server->pdu_size, 4931 NULL, 0, false); 4932 } 4933 4934 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4935 unsigned int *noff) 4936 { 4937 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4938 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 4939 4940 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 4941 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 4942 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 4943 return -EINVAL; 4944 } else { 4945 *noff = le32_to_cpu(hdr->NextCommand); 4946 } 4947 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 4948 return -EINVAL; 4949 return 0; 4950 } 4951 4952 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 4953 struct dentry *dentry, struct cifs_tcon *tcon, 4954 const char *full_path, umode_t mode, dev_t dev) 4955 { 4956 struct cifs_open_info_data buf = {}; 4957 struct TCP_Server_Info *server = tcon->ses->server; 4958 struct cifs_open_parms oparms; 4959 struct cifs_io_parms io_parms = {}; 4960 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 4961 struct cifs_fid fid; 4962 unsigned int bytes_written; 4963 struct win_dev *pdev; 4964 struct kvec iov[2]; 4965 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 4966 int rc; 4967 4968 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 4969 return -EPERM; 4970 4971 oparms = (struct cifs_open_parms) { 4972 .tcon = tcon, 4973 .cifs_sb = cifs_sb, 4974 .desired_access = GENERIC_WRITE, 4975 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 4976 CREATE_OPTION_SPECIAL), 4977 .disposition = FILE_CREATE, 4978 .path = full_path, 4979 .fid = &fid, 4980 }; 4981 4982 rc = server->ops->open(xid, &oparms, &oplock, &buf); 4983 if (rc) 4984 return rc; 4985 4986 /* 4987 * BB Do not bother to decode buf since no local inode yet to put 4988 * timestamps in, but we can reuse it safely. 4989 */ 4990 pdev = (struct win_dev *)&buf.fi; 4991 io_parms.pid = current->tgid; 4992 io_parms.tcon = tcon; 4993 io_parms.length = sizeof(*pdev); 4994 iov[1].iov_base = pdev; 4995 iov[1].iov_len = sizeof(*pdev); 4996 if (S_ISCHR(mode)) { 4997 memcpy(pdev->type, "IntxCHR", 8); 4998 pdev->major = cpu_to_le64(MAJOR(dev)); 4999 pdev->minor = cpu_to_le64(MINOR(dev)); 5000 } else if (S_ISBLK(mode)) { 5001 memcpy(pdev->type, "IntxBLK", 8); 5002 pdev->major = cpu_to_le64(MAJOR(dev)); 5003 pdev->minor = cpu_to_le64(MINOR(dev)); 5004 } else if (S_ISFIFO(mode)) { 5005 memcpy(pdev->type, "LnxFIFO", 8); 5006 } 5007 5008 rc = server->ops->sync_write(xid, &fid, &io_parms, 5009 &bytes_written, iov, 1); 5010 server->ops->close(xid, tcon, &fid); 5011 d_drop(dentry); 5012 /* FIXME: add code here to set EAs */ 5013 cifs_free_open_info(&buf); 5014 return rc; 5015 } 5016 5017 static inline u64 mode_nfs_type(mode_t mode) 5018 { 5019 switch (mode & S_IFMT) { 5020 case S_IFBLK: return NFS_SPECFILE_BLK; 5021 case S_IFCHR: return NFS_SPECFILE_CHR; 5022 case S_IFIFO: return NFS_SPECFILE_FIFO; 5023 case S_IFSOCK: return NFS_SPECFILE_SOCK; 5024 } 5025 return 0; 5026 } 5027 5028 static int nfs_set_reparse_buf(struct reparse_posix_data *buf, 5029 mode_t mode, dev_t dev, 5030 struct kvec *iov) 5031 { 5032 u64 type; 5033 u16 len, dlen; 5034 5035 len = sizeof(*buf); 5036 5037 switch ((type = mode_nfs_type(mode))) { 5038 case NFS_SPECFILE_BLK: 5039 case NFS_SPECFILE_CHR: 5040 dlen = sizeof(__le64); 5041 break; 5042 case NFS_SPECFILE_FIFO: 5043 case NFS_SPECFILE_SOCK: 5044 dlen = 0; 5045 break; 5046 default: 5047 return -EOPNOTSUPP; 5048 } 5049 5050 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS); 5051 buf->Reserved = 0; 5052 buf->InodeType = cpu_to_le64(type); 5053 buf->ReparseDataLength = cpu_to_le16(len + dlen - 5054 sizeof(struct reparse_data_buffer)); 5055 *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) | 5056 MINOR(dev)); 5057 iov->iov_base = buf; 5058 iov->iov_len = len + dlen; 5059 return 0; 5060 } 5061 5062 static int nfs_make_node(unsigned int xid, struct inode *inode, 5063 struct dentry *dentry, struct cifs_tcon *tcon, 5064 const char *full_path, umode_t mode, dev_t dev) 5065 { 5066 struct cifs_open_info_data data; 5067 struct reparse_posix_data *p; 5068 struct inode *new; 5069 struct kvec iov; 5070 __u8 buf[sizeof(*p) + sizeof(__le64)]; 5071 int rc; 5072 5073 p = (struct reparse_posix_data *)buf; 5074 rc = nfs_set_reparse_buf(p, mode, dev, &iov); 5075 if (rc) 5076 return rc; 5077 5078 data = (struct cifs_open_info_data) { 5079 .reparse_point = true, 5080 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, }, 5081 }; 5082 5083 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5084 tcon, full_path, &iov); 5085 if (!IS_ERR(new)) 5086 d_instantiate(dentry, new); 5087 else 5088 rc = PTR_ERR(new); 5089 cifs_free_open_info(&data); 5090 return rc; 5091 } 5092 5093 static int smb2_create_reparse_symlink(const unsigned int xid, 5094 struct inode *inode, 5095 struct dentry *dentry, 5096 struct cifs_tcon *tcon, 5097 const char *full_path, 5098 const char *symname) 5099 { 5100 struct reparse_symlink_data_buffer *buf = NULL; 5101 struct cifs_open_info_data data; 5102 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5103 struct inode *new; 5104 struct kvec iov; 5105 __le16 *path; 5106 char *sym; 5107 u16 len, plen; 5108 int rc = 0; 5109 5110 sym = kstrdup(symname, GFP_KERNEL); 5111 if (!sym) 5112 return -ENOMEM; 5113 5114 data = (struct cifs_open_info_data) { 5115 .reparse_point = true, 5116 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, }, 5117 .symlink_target = sym, 5118 }; 5119 5120 path = cifs_convert_path_to_utf16(symname, cifs_sb); 5121 if (!path) { 5122 rc = -ENOMEM; 5123 goto out; 5124 } 5125 5126 plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX); 5127 len = sizeof(*buf) + plen * 2; 5128 buf = kzalloc(len, GFP_KERNEL); 5129 if (!buf) { 5130 rc = -ENOMEM; 5131 goto out; 5132 } 5133 5134 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK); 5135 buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer)); 5136 buf->SubstituteNameOffset = cpu_to_le16(plen); 5137 buf->SubstituteNameLength = cpu_to_le16(plen); 5138 memcpy(&buf->PathBuffer[plen], path, plen); 5139 buf->PrintNameOffset = 0; 5140 buf->PrintNameLength = cpu_to_le16(plen); 5141 memcpy(buf->PathBuffer, path, plen); 5142 buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0); 5143 5144 iov.iov_base = buf; 5145 iov.iov_len = len; 5146 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5147 tcon, full_path, &iov); 5148 if (!IS_ERR(new)) 5149 d_instantiate(dentry, new); 5150 else 5151 rc = PTR_ERR(new); 5152 out: 5153 kfree(path); 5154 cifs_free_open_info(&data); 5155 kfree(buf); 5156 return rc; 5157 } 5158 5159 static int smb2_make_node(unsigned int xid, struct inode *inode, 5160 struct dentry *dentry, struct cifs_tcon *tcon, 5161 const char *full_path, umode_t mode, dev_t dev) 5162 { 5163 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5164 int rc; 5165 5166 /* 5167 * Check if mounted with mount parm 'sfu' mount parm. 5168 * SFU emulation should work with all servers, but only 5169 * supports block and char device (no socket & fifo), 5170 * and was used by default in earlier versions of Windows 5171 */ 5172 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5173 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5174 full_path, mode, dev); 5175 } else { 5176 rc = nfs_make_node(xid, inode, dentry, tcon, 5177 full_path, mode, dev); 5178 } 5179 return rc; 5180 } 5181 5182 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5183 struct smb_version_operations smb20_operations = { 5184 .compare_fids = smb2_compare_fids, 5185 .setup_request = smb2_setup_request, 5186 .setup_async_request = smb2_setup_async_request, 5187 .check_receive = smb2_check_receive, 5188 .add_credits = smb2_add_credits, 5189 .set_credits = smb2_set_credits, 5190 .get_credits_field = smb2_get_credits_field, 5191 .get_credits = smb2_get_credits, 5192 .wait_mtu_credits = cifs_wait_mtu_credits, 5193 .get_next_mid = smb2_get_next_mid, 5194 .revert_current_mid = smb2_revert_current_mid, 5195 .read_data_offset = smb2_read_data_offset, 5196 .read_data_length = smb2_read_data_length, 5197 .map_error = map_smb2_to_linux_error, 5198 .find_mid = smb2_find_mid, 5199 .check_message = smb2_check_message, 5200 .dump_detail = smb2_dump_detail, 5201 .clear_stats = smb2_clear_stats, 5202 .print_stats = smb2_print_stats, 5203 .is_oplock_break = smb2_is_valid_oplock_break, 5204 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5205 .downgrade_oplock = smb2_downgrade_oplock, 5206 .need_neg = smb2_need_neg, 5207 .negotiate = smb2_negotiate, 5208 .negotiate_wsize = smb2_negotiate_wsize, 5209 .negotiate_rsize = smb2_negotiate_rsize, 5210 .sess_setup = SMB2_sess_setup, 5211 .logoff = SMB2_logoff, 5212 .tree_connect = SMB2_tcon, 5213 .tree_disconnect = SMB2_tdis, 5214 .qfs_tcon = smb2_qfs_tcon, 5215 .is_path_accessible = smb2_is_path_accessible, 5216 .can_echo = smb2_can_echo, 5217 .echo = SMB2_echo, 5218 .query_path_info = smb2_query_path_info, 5219 .query_reparse_point = smb2_query_reparse_point, 5220 .get_srv_inum = smb2_get_srv_inum, 5221 .query_file_info = smb2_query_file_info, 5222 .set_path_size = smb2_set_path_size, 5223 .set_file_size = smb2_set_file_size, 5224 .set_file_info = smb2_set_file_info, 5225 .set_compression = smb2_set_compression, 5226 .mkdir = smb2_mkdir, 5227 .mkdir_setinfo = smb2_mkdir_setinfo, 5228 .rmdir = smb2_rmdir, 5229 .unlink = smb2_unlink, 5230 .rename = smb2_rename_path, 5231 .create_hardlink = smb2_create_hardlink, 5232 .parse_reparse_point = smb2_parse_reparse_point, 5233 .query_mf_symlink = smb3_query_mf_symlink, 5234 .create_mf_symlink = smb3_create_mf_symlink, 5235 .create_reparse_symlink = smb2_create_reparse_symlink, 5236 .open = smb2_open_file, 5237 .set_fid = smb2_set_fid, 5238 .close = smb2_close_file, 5239 .flush = smb2_flush_file, 5240 .async_readv = smb2_async_readv, 5241 .async_writev = smb2_async_writev, 5242 .sync_read = smb2_sync_read, 5243 .sync_write = smb2_sync_write, 5244 .query_dir_first = smb2_query_dir_first, 5245 .query_dir_next = smb2_query_dir_next, 5246 .close_dir = smb2_close_dir, 5247 .calc_smb_size = smb2_calc_size, 5248 .is_status_pending = smb2_is_status_pending, 5249 .is_session_expired = smb2_is_session_expired, 5250 .oplock_response = smb2_oplock_response, 5251 .queryfs = smb2_queryfs, 5252 .mand_lock = smb2_mand_lock, 5253 .mand_unlock_range = smb2_unlock_range, 5254 .push_mand_locks = smb2_push_mandatory_locks, 5255 .get_lease_key = smb2_get_lease_key, 5256 .set_lease_key = smb2_set_lease_key, 5257 .new_lease_key = smb2_new_lease_key, 5258 .calc_signature = smb2_calc_signature, 5259 .is_read_op = smb2_is_read_op, 5260 .set_oplock_level = smb2_set_oplock_level, 5261 .create_lease_buf = smb2_create_lease_buf, 5262 .parse_lease_buf = smb2_parse_lease_buf, 5263 .copychunk_range = smb2_copychunk_range, 5264 .wp_retry_size = smb2_wp_retry_size, 5265 .dir_needs_close = smb2_dir_needs_close, 5266 .get_dfs_refer = smb2_get_dfs_refer, 5267 .select_sectype = smb2_select_sectype, 5268 #ifdef CONFIG_CIFS_XATTR 5269 .query_all_EAs = smb2_query_eas, 5270 .set_EA = smb2_set_ea, 5271 #endif /* CIFS_XATTR */ 5272 .get_acl = get_smb2_acl, 5273 .get_acl_by_fid = get_smb2_acl_by_fid, 5274 .set_acl = set_smb2_acl, 5275 .next_header = smb2_next_header, 5276 .ioctl_query_info = smb2_ioctl_query_info, 5277 .make_node = smb2_make_node, 5278 .fiemap = smb3_fiemap, 5279 .llseek = smb3_llseek, 5280 .is_status_io_timeout = smb2_is_status_io_timeout, 5281 .is_network_name_deleted = smb2_is_network_name_deleted, 5282 }; 5283 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5284 5285 struct smb_version_operations smb21_operations = { 5286 .compare_fids = smb2_compare_fids, 5287 .setup_request = smb2_setup_request, 5288 .setup_async_request = smb2_setup_async_request, 5289 .check_receive = smb2_check_receive, 5290 .add_credits = smb2_add_credits, 5291 .set_credits = smb2_set_credits, 5292 .get_credits_field = smb2_get_credits_field, 5293 .get_credits = smb2_get_credits, 5294 .wait_mtu_credits = smb2_wait_mtu_credits, 5295 .adjust_credits = smb2_adjust_credits, 5296 .get_next_mid = smb2_get_next_mid, 5297 .revert_current_mid = smb2_revert_current_mid, 5298 .read_data_offset = smb2_read_data_offset, 5299 .read_data_length = smb2_read_data_length, 5300 .map_error = map_smb2_to_linux_error, 5301 .find_mid = smb2_find_mid, 5302 .check_message = smb2_check_message, 5303 .dump_detail = smb2_dump_detail, 5304 .clear_stats = smb2_clear_stats, 5305 .print_stats = smb2_print_stats, 5306 .is_oplock_break = smb2_is_valid_oplock_break, 5307 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5308 .downgrade_oplock = smb2_downgrade_oplock, 5309 .need_neg = smb2_need_neg, 5310 .negotiate = smb2_negotiate, 5311 .negotiate_wsize = smb2_negotiate_wsize, 5312 .negotiate_rsize = smb2_negotiate_rsize, 5313 .sess_setup = SMB2_sess_setup, 5314 .logoff = SMB2_logoff, 5315 .tree_connect = SMB2_tcon, 5316 .tree_disconnect = SMB2_tdis, 5317 .qfs_tcon = smb2_qfs_tcon, 5318 .is_path_accessible = smb2_is_path_accessible, 5319 .can_echo = smb2_can_echo, 5320 .echo = SMB2_echo, 5321 .query_path_info = smb2_query_path_info, 5322 .query_reparse_point = smb2_query_reparse_point, 5323 .get_srv_inum = smb2_get_srv_inum, 5324 .query_file_info = smb2_query_file_info, 5325 .set_path_size = smb2_set_path_size, 5326 .set_file_size = smb2_set_file_size, 5327 .set_file_info = smb2_set_file_info, 5328 .set_compression = smb2_set_compression, 5329 .mkdir = smb2_mkdir, 5330 .mkdir_setinfo = smb2_mkdir_setinfo, 5331 .rmdir = smb2_rmdir, 5332 .unlink = smb2_unlink, 5333 .rename = smb2_rename_path, 5334 .create_hardlink = smb2_create_hardlink, 5335 .parse_reparse_point = smb2_parse_reparse_point, 5336 .query_mf_symlink = smb3_query_mf_symlink, 5337 .create_mf_symlink = smb3_create_mf_symlink, 5338 .create_reparse_symlink = smb2_create_reparse_symlink, 5339 .open = smb2_open_file, 5340 .set_fid = smb2_set_fid, 5341 .close = smb2_close_file, 5342 .flush = smb2_flush_file, 5343 .async_readv = smb2_async_readv, 5344 .async_writev = smb2_async_writev, 5345 .sync_read = smb2_sync_read, 5346 .sync_write = smb2_sync_write, 5347 .query_dir_first = smb2_query_dir_first, 5348 .query_dir_next = smb2_query_dir_next, 5349 .close_dir = smb2_close_dir, 5350 .calc_smb_size = smb2_calc_size, 5351 .is_status_pending = smb2_is_status_pending, 5352 .is_session_expired = smb2_is_session_expired, 5353 .oplock_response = smb2_oplock_response, 5354 .queryfs = smb2_queryfs, 5355 .mand_lock = smb2_mand_lock, 5356 .mand_unlock_range = smb2_unlock_range, 5357 .push_mand_locks = smb2_push_mandatory_locks, 5358 .get_lease_key = smb2_get_lease_key, 5359 .set_lease_key = smb2_set_lease_key, 5360 .new_lease_key = smb2_new_lease_key, 5361 .calc_signature = smb2_calc_signature, 5362 .is_read_op = smb21_is_read_op, 5363 .set_oplock_level = smb21_set_oplock_level, 5364 .create_lease_buf = smb2_create_lease_buf, 5365 .parse_lease_buf = smb2_parse_lease_buf, 5366 .copychunk_range = smb2_copychunk_range, 5367 .wp_retry_size = smb2_wp_retry_size, 5368 .dir_needs_close = smb2_dir_needs_close, 5369 .enum_snapshots = smb3_enum_snapshots, 5370 .notify = smb3_notify, 5371 .get_dfs_refer = smb2_get_dfs_refer, 5372 .select_sectype = smb2_select_sectype, 5373 #ifdef CONFIG_CIFS_XATTR 5374 .query_all_EAs = smb2_query_eas, 5375 .set_EA = smb2_set_ea, 5376 #endif /* CIFS_XATTR */ 5377 .get_acl = get_smb2_acl, 5378 .get_acl_by_fid = get_smb2_acl_by_fid, 5379 .set_acl = set_smb2_acl, 5380 .next_header = smb2_next_header, 5381 .ioctl_query_info = smb2_ioctl_query_info, 5382 .make_node = smb2_make_node, 5383 .fiemap = smb3_fiemap, 5384 .llseek = smb3_llseek, 5385 .is_status_io_timeout = smb2_is_status_io_timeout, 5386 .is_network_name_deleted = smb2_is_network_name_deleted, 5387 }; 5388 5389 struct smb_version_operations smb30_operations = { 5390 .compare_fids = smb2_compare_fids, 5391 .setup_request = smb2_setup_request, 5392 .setup_async_request = smb2_setup_async_request, 5393 .check_receive = smb2_check_receive, 5394 .add_credits = smb2_add_credits, 5395 .set_credits = smb2_set_credits, 5396 .get_credits_field = smb2_get_credits_field, 5397 .get_credits = smb2_get_credits, 5398 .wait_mtu_credits = smb2_wait_mtu_credits, 5399 .adjust_credits = smb2_adjust_credits, 5400 .get_next_mid = smb2_get_next_mid, 5401 .revert_current_mid = smb2_revert_current_mid, 5402 .read_data_offset = smb2_read_data_offset, 5403 .read_data_length = smb2_read_data_length, 5404 .map_error = map_smb2_to_linux_error, 5405 .find_mid = smb2_find_mid, 5406 .check_message = smb2_check_message, 5407 .dump_detail = smb2_dump_detail, 5408 .clear_stats = smb2_clear_stats, 5409 .print_stats = smb2_print_stats, 5410 .dump_share_caps = smb2_dump_share_caps, 5411 .is_oplock_break = smb2_is_valid_oplock_break, 5412 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5413 .downgrade_oplock = smb3_downgrade_oplock, 5414 .need_neg = smb2_need_neg, 5415 .negotiate = smb2_negotiate, 5416 .negotiate_wsize = smb3_negotiate_wsize, 5417 .negotiate_rsize = smb3_negotiate_rsize, 5418 .sess_setup = SMB2_sess_setup, 5419 .logoff = SMB2_logoff, 5420 .tree_connect = SMB2_tcon, 5421 .tree_disconnect = SMB2_tdis, 5422 .qfs_tcon = smb3_qfs_tcon, 5423 .query_server_interfaces = SMB3_request_interfaces, 5424 .is_path_accessible = smb2_is_path_accessible, 5425 .can_echo = smb2_can_echo, 5426 .echo = SMB2_echo, 5427 .query_path_info = smb2_query_path_info, 5428 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5429 .query_reparse_point = smb2_query_reparse_point, 5430 .get_srv_inum = smb2_get_srv_inum, 5431 .query_file_info = smb2_query_file_info, 5432 .set_path_size = smb2_set_path_size, 5433 .set_file_size = smb2_set_file_size, 5434 .set_file_info = smb2_set_file_info, 5435 .set_compression = smb2_set_compression, 5436 .mkdir = smb2_mkdir, 5437 .mkdir_setinfo = smb2_mkdir_setinfo, 5438 .rmdir = smb2_rmdir, 5439 .unlink = smb2_unlink, 5440 .rename = smb2_rename_path, 5441 .create_hardlink = smb2_create_hardlink, 5442 .parse_reparse_point = smb2_parse_reparse_point, 5443 .query_mf_symlink = smb3_query_mf_symlink, 5444 .create_mf_symlink = smb3_create_mf_symlink, 5445 .create_reparse_symlink = smb2_create_reparse_symlink, 5446 .open = smb2_open_file, 5447 .set_fid = smb2_set_fid, 5448 .close = smb2_close_file, 5449 .close_getattr = smb2_close_getattr, 5450 .flush = smb2_flush_file, 5451 .async_readv = smb2_async_readv, 5452 .async_writev = smb2_async_writev, 5453 .sync_read = smb2_sync_read, 5454 .sync_write = smb2_sync_write, 5455 .query_dir_first = smb2_query_dir_first, 5456 .query_dir_next = smb2_query_dir_next, 5457 .close_dir = smb2_close_dir, 5458 .calc_smb_size = smb2_calc_size, 5459 .is_status_pending = smb2_is_status_pending, 5460 .is_session_expired = smb2_is_session_expired, 5461 .oplock_response = smb2_oplock_response, 5462 .queryfs = smb2_queryfs, 5463 .mand_lock = smb2_mand_lock, 5464 .mand_unlock_range = smb2_unlock_range, 5465 .push_mand_locks = smb2_push_mandatory_locks, 5466 .get_lease_key = smb2_get_lease_key, 5467 .set_lease_key = smb2_set_lease_key, 5468 .new_lease_key = smb2_new_lease_key, 5469 .generate_signingkey = generate_smb30signingkey, 5470 .calc_signature = smb3_calc_signature, 5471 .set_integrity = smb3_set_integrity, 5472 .is_read_op = smb21_is_read_op, 5473 .set_oplock_level = smb3_set_oplock_level, 5474 .create_lease_buf = smb3_create_lease_buf, 5475 .parse_lease_buf = smb3_parse_lease_buf, 5476 .copychunk_range = smb2_copychunk_range, 5477 .duplicate_extents = smb2_duplicate_extents, 5478 .validate_negotiate = smb3_validate_negotiate, 5479 .wp_retry_size = smb2_wp_retry_size, 5480 .dir_needs_close = smb2_dir_needs_close, 5481 .fallocate = smb3_fallocate, 5482 .enum_snapshots = smb3_enum_snapshots, 5483 .notify = smb3_notify, 5484 .init_transform_rq = smb3_init_transform_rq, 5485 .is_transform_hdr = smb3_is_transform_hdr, 5486 .receive_transform = smb3_receive_transform, 5487 .get_dfs_refer = smb2_get_dfs_refer, 5488 .select_sectype = smb2_select_sectype, 5489 #ifdef CONFIG_CIFS_XATTR 5490 .query_all_EAs = smb2_query_eas, 5491 .set_EA = smb2_set_ea, 5492 #endif /* CIFS_XATTR */ 5493 .get_acl = get_smb2_acl, 5494 .get_acl_by_fid = get_smb2_acl_by_fid, 5495 .set_acl = set_smb2_acl, 5496 .next_header = smb2_next_header, 5497 .ioctl_query_info = smb2_ioctl_query_info, 5498 .make_node = smb2_make_node, 5499 .fiemap = smb3_fiemap, 5500 .llseek = smb3_llseek, 5501 .is_status_io_timeout = smb2_is_status_io_timeout, 5502 .is_network_name_deleted = smb2_is_network_name_deleted, 5503 }; 5504 5505 struct smb_version_operations smb311_operations = { 5506 .compare_fids = smb2_compare_fids, 5507 .setup_request = smb2_setup_request, 5508 .setup_async_request = smb2_setup_async_request, 5509 .check_receive = smb2_check_receive, 5510 .add_credits = smb2_add_credits, 5511 .set_credits = smb2_set_credits, 5512 .get_credits_field = smb2_get_credits_field, 5513 .get_credits = smb2_get_credits, 5514 .wait_mtu_credits = smb2_wait_mtu_credits, 5515 .adjust_credits = smb2_adjust_credits, 5516 .get_next_mid = smb2_get_next_mid, 5517 .revert_current_mid = smb2_revert_current_mid, 5518 .read_data_offset = smb2_read_data_offset, 5519 .read_data_length = smb2_read_data_length, 5520 .map_error = map_smb2_to_linux_error, 5521 .find_mid = smb2_find_mid, 5522 .check_message = smb2_check_message, 5523 .dump_detail = smb2_dump_detail, 5524 .clear_stats = smb2_clear_stats, 5525 .print_stats = smb2_print_stats, 5526 .dump_share_caps = smb2_dump_share_caps, 5527 .is_oplock_break = smb2_is_valid_oplock_break, 5528 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5529 .downgrade_oplock = smb3_downgrade_oplock, 5530 .need_neg = smb2_need_neg, 5531 .negotiate = smb2_negotiate, 5532 .negotiate_wsize = smb3_negotiate_wsize, 5533 .negotiate_rsize = smb3_negotiate_rsize, 5534 .sess_setup = SMB2_sess_setup, 5535 .logoff = SMB2_logoff, 5536 .tree_connect = SMB2_tcon, 5537 .tree_disconnect = SMB2_tdis, 5538 .qfs_tcon = smb3_qfs_tcon, 5539 .query_server_interfaces = SMB3_request_interfaces, 5540 .is_path_accessible = smb2_is_path_accessible, 5541 .can_echo = smb2_can_echo, 5542 .echo = SMB2_echo, 5543 .query_path_info = smb2_query_path_info, 5544 .query_reparse_point = smb2_query_reparse_point, 5545 .get_srv_inum = smb2_get_srv_inum, 5546 .query_file_info = smb2_query_file_info, 5547 .set_path_size = smb2_set_path_size, 5548 .set_file_size = smb2_set_file_size, 5549 .set_file_info = smb2_set_file_info, 5550 .set_compression = smb2_set_compression, 5551 .mkdir = smb2_mkdir, 5552 .mkdir_setinfo = smb2_mkdir_setinfo, 5553 .posix_mkdir = smb311_posix_mkdir, 5554 .rmdir = smb2_rmdir, 5555 .unlink = smb2_unlink, 5556 .rename = smb2_rename_path, 5557 .create_hardlink = smb2_create_hardlink, 5558 .parse_reparse_point = smb2_parse_reparse_point, 5559 .query_mf_symlink = smb3_query_mf_symlink, 5560 .create_mf_symlink = smb3_create_mf_symlink, 5561 .create_reparse_symlink = smb2_create_reparse_symlink, 5562 .open = smb2_open_file, 5563 .set_fid = smb2_set_fid, 5564 .close = smb2_close_file, 5565 .close_getattr = smb2_close_getattr, 5566 .flush = smb2_flush_file, 5567 .async_readv = smb2_async_readv, 5568 .async_writev = smb2_async_writev, 5569 .sync_read = smb2_sync_read, 5570 .sync_write = smb2_sync_write, 5571 .query_dir_first = smb2_query_dir_first, 5572 .query_dir_next = smb2_query_dir_next, 5573 .close_dir = smb2_close_dir, 5574 .calc_smb_size = smb2_calc_size, 5575 .is_status_pending = smb2_is_status_pending, 5576 .is_session_expired = smb2_is_session_expired, 5577 .oplock_response = smb2_oplock_response, 5578 .queryfs = smb311_queryfs, 5579 .mand_lock = smb2_mand_lock, 5580 .mand_unlock_range = smb2_unlock_range, 5581 .push_mand_locks = smb2_push_mandatory_locks, 5582 .get_lease_key = smb2_get_lease_key, 5583 .set_lease_key = smb2_set_lease_key, 5584 .new_lease_key = smb2_new_lease_key, 5585 .generate_signingkey = generate_smb311signingkey, 5586 .calc_signature = smb3_calc_signature, 5587 .set_integrity = smb3_set_integrity, 5588 .is_read_op = smb21_is_read_op, 5589 .set_oplock_level = smb3_set_oplock_level, 5590 .create_lease_buf = smb3_create_lease_buf, 5591 .parse_lease_buf = smb3_parse_lease_buf, 5592 .copychunk_range = smb2_copychunk_range, 5593 .duplicate_extents = smb2_duplicate_extents, 5594 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5595 .wp_retry_size = smb2_wp_retry_size, 5596 .dir_needs_close = smb2_dir_needs_close, 5597 .fallocate = smb3_fallocate, 5598 .enum_snapshots = smb3_enum_snapshots, 5599 .notify = smb3_notify, 5600 .init_transform_rq = smb3_init_transform_rq, 5601 .is_transform_hdr = smb3_is_transform_hdr, 5602 .receive_transform = smb3_receive_transform, 5603 .get_dfs_refer = smb2_get_dfs_refer, 5604 .select_sectype = smb2_select_sectype, 5605 #ifdef CONFIG_CIFS_XATTR 5606 .query_all_EAs = smb2_query_eas, 5607 .set_EA = smb2_set_ea, 5608 #endif /* CIFS_XATTR */ 5609 .get_acl = get_smb2_acl, 5610 .get_acl_by_fid = get_smb2_acl_by_fid, 5611 .set_acl = set_smb2_acl, 5612 .next_header = smb2_next_header, 5613 .ioctl_query_info = smb2_ioctl_query_info, 5614 .make_node = smb2_make_node, 5615 .fiemap = smb3_fiemap, 5616 .llseek = smb3_llseek, 5617 .is_status_io_timeout = smb2_is_status_io_timeout, 5618 .is_network_name_deleted = smb2_is_network_name_deleted, 5619 }; 5620 5621 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5622 struct smb_version_values smb20_values = { 5623 .version_string = SMB20_VERSION_STRING, 5624 .protocol_id = SMB20_PROT_ID, 5625 .req_capabilities = 0, /* MBZ */ 5626 .large_lock_type = 0, 5627 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5628 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5629 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5630 .header_size = sizeof(struct smb2_hdr), 5631 .header_preamble_size = 0, 5632 .max_header_size = MAX_SMB2_HDR_SIZE, 5633 .read_rsp_size = sizeof(struct smb2_read_rsp), 5634 .lock_cmd = SMB2_LOCK, 5635 .cap_unix = 0, 5636 .cap_nt_find = SMB2_NT_FIND, 5637 .cap_large_files = SMB2_LARGE_FILES, 5638 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5639 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5640 .create_lease_size = sizeof(struct create_lease), 5641 }; 5642 #endif /* ALLOW_INSECURE_LEGACY */ 5643 5644 struct smb_version_values smb21_values = { 5645 .version_string = SMB21_VERSION_STRING, 5646 .protocol_id = SMB21_PROT_ID, 5647 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5648 .large_lock_type = 0, 5649 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5650 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5651 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5652 .header_size = sizeof(struct smb2_hdr), 5653 .header_preamble_size = 0, 5654 .max_header_size = MAX_SMB2_HDR_SIZE, 5655 .read_rsp_size = sizeof(struct smb2_read_rsp), 5656 .lock_cmd = SMB2_LOCK, 5657 .cap_unix = 0, 5658 .cap_nt_find = SMB2_NT_FIND, 5659 .cap_large_files = SMB2_LARGE_FILES, 5660 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5661 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5662 .create_lease_size = sizeof(struct create_lease), 5663 }; 5664 5665 struct smb_version_values smb3any_values = { 5666 .version_string = SMB3ANY_VERSION_STRING, 5667 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5668 .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, 5669 .large_lock_type = 0, 5670 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5671 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5672 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5673 .header_size = sizeof(struct smb2_hdr), 5674 .header_preamble_size = 0, 5675 .max_header_size = MAX_SMB2_HDR_SIZE, 5676 .read_rsp_size = sizeof(struct smb2_read_rsp), 5677 .lock_cmd = SMB2_LOCK, 5678 .cap_unix = 0, 5679 .cap_nt_find = SMB2_NT_FIND, 5680 .cap_large_files = SMB2_LARGE_FILES, 5681 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5682 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5683 .create_lease_size = sizeof(struct create_lease_v2), 5684 }; 5685 5686 struct smb_version_values smbdefault_values = { 5687 .version_string = SMBDEFAULT_VERSION_STRING, 5688 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5689 .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, 5690 .large_lock_type = 0, 5691 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5692 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5693 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5694 .header_size = sizeof(struct smb2_hdr), 5695 .header_preamble_size = 0, 5696 .max_header_size = MAX_SMB2_HDR_SIZE, 5697 .read_rsp_size = sizeof(struct smb2_read_rsp), 5698 .lock_cmd = SMB2_LOCK, 5699 .cap_unix = 0, 5700 .cap_nt_find = SMB2_NT_FIND, 5701 .cap_large_files = SMB2_LARGE_FILES, 5702 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5703 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5704 .create_lease_size = sizeof(struct create_lease_v2), 5705 }; 5706 5707 struct smb_version_values smb30_values = { 5708 .version_string = SMB30_VERSION_STRING, 5709 .protocol_id = SMB30_PROT_ID, 5710 .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, 5711 .large_lock_type = 0, 5712 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5713 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5714 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5715 .header_size = sizeof(struct smb2_hdr), 5716 .header_preamble_size = 0, 5717 .max_header_size = MAX_SMB2_HDR_SIZE, 5718 .read_rsp_size = sizeof(struct smb2_read_rsp), 5719 .lock_cmd = SMB2_LOCK, 5720 .cap_unix = 0, 5721 .cap_nt_find = SMB2_NT_FIND, 5722 .cap_large_files = SMB2_LARGE_FILES, 5723 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5724 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5725 .create_lease_size = sizeof(struct create_lease_v2), 5726 }; 5727 5728 struct smb_version_values smb302_values = { 5729 .version_string = SMB302_VERSION_STRING, 5730 .protocol_id = SMB302_PROT_ID, 5731 .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, 5732 .large_lock_type = 0, 5733 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5734 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5735 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5736 .header_size = sizeof(struct smb2_hdr), 5737 .header_preamble_size = 0, 5738 .max_header_size = MAX_SMB2_HDR_SIZE, 5739 .read_rsp_size = sizeof(struct smb2_read_rsp), 5740 .lock_cmd = SMB2_LOCK, 5741 .cap_unix = 0, 5742 .cap_nt_find = SMB2_NT_FIND, 5743 .cap_large_files = SMB2_LARGE_FILES, 5744 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5745 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5746 .create_lease_size = sizeof(struct create_lease_v2), 5747 }; 5748 5749 struct smb_version_values smb311_values = { 5750 .version_string = SMB311_VERSION_STRING, 5751 .protocol_id = SMB311_PROT_ID, 5752 .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, 5753 .large_lock_type = 0, 5754 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5755 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5756 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5757 .header_size = sizeof(struct smb2_hdr), 5758 .header_preamble_size = 0, 5759 .max_header_size = MAX_SMB2_HDR_SIZE, 5760 .read_rsp_size = sizeof(struct smb2_read_rsp), 5761 .lock_cmd = SMB2_LOCK, 5762 .cap_unix = 0, 5763 .cap_nt_find = SMB2_NT_FIND, 5764 .cap_large_files = SMB2_LARGE_FILES, 5765 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5766 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5767 .create_lease_size = sizeof(struct create_lease_v2), 5768 }; 5769