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 __le64 eof = cpu_to_le64(size); 1936 struct inode *inode; 1937 1938 /* 1939 * If extending file more than one page make sparse. Many Linux fs 1940 * make files sparse by default when extending via ftruncate 1941 */ 1942 inode = d_inode(cfile->dentry); 1943 1944 if (!set_alloc && (size > inode->i_size + 8192)) { 1945 __u8 set_sparse = 1; 1946 1947 /* whether set sparse succeeds or not, extend the file */ 1948 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1949 } 1950 1951 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1952 cfile->fid.volatile_fid, cfile->pid, &eof); 1953 } 1954 1955 static int 1956 smb2_duplicate_extents(const unsigned int xid, 1957 struct cifsFileInfo *srcfile, 1958 struct cifsFileInfo *trgtfile, u64 src_off, 1959 u64 len, u64 dest_off) 1960 { 1961 int rc; 1962 unsigned int ret_data_len; 1963 struct inode *inode; 1964 struct duplicate_extents_to_file dup_ext_buf; 1965 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 1966 1967 /* server fileays advertise duplicate extent support with this flag */ 1968 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 1969 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 1970 return -EOPNOTSUPP; 1971 1972 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 1973 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 1974 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 1975 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 1976 dup_ext_buf.ByteCount = cpu_to_le64(len); 1977 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 1978 src_off, dest_off, len); 1979 1980 inode = d_inode(trgtfile->dentry); 1981 if (inode->i_size < dest_off + len) { 1982 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 1983 if (rc) 1984 goto duplicate_extents_out; 1985 1986 /* 1987 * Although also could set plausible allocation size (i_blocks) 1988 * here in addition to setting the file size, in reflink 1989 * it is likely that the target file is sparse. Its allocation 1990 * size will be queried on next revalidate, but it is important 1991 * to make sure that file's cached size is updated immediately 1992 */ 1993 cifs_setsize(inode, dest_off + len); 1994 } 1995 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1996 trgtfile->fid.volatile_fid, 1997 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 1998 (char *)&dup_ext_buf, 1999 sizeof(struct duplicate_extents_to_file), 2000 CIFSMaxBufSize, NULL, 2001 &ret_data_len); 2002 2003 if (ret_data_len > 0) 2004 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2005 2006 duplicate_extents_out: 2007 return rc; 2008 } 2009 2010 static int 2011 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2012 struct cifsFileInfo *cfile) 2013 { 2014 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2015 cfile->fid.volatile_fid); 2016 } 2017 2018 static int 2019 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2020 struct cifsFileInfo *cfile) 2021 { 2022 struct fsctl_set_integrity_information_req integr_info; 2023 unsigned int ret_data_len; 2024 2025 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2026 integr_info.Flags = 0; 2027 integr_info.Reserved = 0; 2028 2029 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2030 cfile->fid.volatile_fid, 2031 FSCTL_SET_INTEGRITY_INFORMATION, 2032 (char *)&integr_info, 2033 sizeof(struct fsctl_set_integrity_information_req), 2034 CIFSMaxBufSize, NULL, 2035 &ret_data_len); 2036 2037 } 2038 2039 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2040 #define GMT_TOKEN_SIZE 50 2041 2042 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2043 2044 /* 2045 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2046 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2047 */ 2048 static int 2049 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2050 struct cifsFileInfo *cfile, void __user *ioc_buf) 2051 { 2052 char *retbuf = NULL; 2053 unsigned int ret_data_len = 0; 2054 int rc; 2055 u32 max_response_size; 2056 struct smb_snapshot_array snapshot_in; 2057 2058 /* 2059 * On the first query to enumerate the list of snapshots available 2060 * for this volume the buffer begins with 0 (number of snapshots 2061 * which can be returned is zero since at that point we do not know 2062 * how big the buffer needs to be). On the second query, 2063 * it (ret_data_len) is set to number of snapshots so we can 2064 * know to set the maximum response size larger (see below). 2065 */ 2066 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2067 return -EFAULT; 2068 2069 /* 2070 * Note that for snapshot queries that servers like Azure expect that 2071 * the first query be minimal size (and just used to get the number/size 2072 * of previous versions) so response size must be specified as EXACTLY 2073 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2074 * of eight bytes. 2075 */ 2076 if (ret_data_len == 0) 2077 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2078 else 2079 max_response_size = CIFSMaxBufSize; 2080 2081 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2082 cfile->fid.volatile_fid, 2083 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2084 NULL, 0 /* no input data */, max_response_size, 2085 (char **)&retbuf, 2086 &ret_data_len); 2087 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2088 rc, ret_data_len); 2089 if (rc) 2090 return rc; 2091 2092 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2093 /* Fixup buffer */ 2094 if (copy_from_user(&snapshot_in, ioc_buf, 2095 sizeof(struct smb_snapshot_array))) { 2096 rc = -EFAULT; 2097 kfree(retbuf); 2098 return rc; 2099 } 2100 2101 /* 2102 * Check for min size, ie not large enough to fit even one GMT 2103 * token (snapshot). On the first ioctl some users may pass in 2104 * smaller size (or zero) to simply get the size of the array 2105 * so the user space caller can allocate sufficient memory 2106 * and retry the ioctl again with larger array size sufficient 2107 * to hold all of the snapshot GMT tokens on the second try. 2108 */ 2109 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2110 ret_data_len = sizeof(struct smb_snapshot_array); 2111 2112 /* 2113 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2114 * the snapshot array (of 50 byte GMT tokens) each 2115 * representing an available previous version of the data 2116 */ 2117 if (ret_data_len > (snapshot_in.snapshot_array_size + 2118 sizeof(struct smb_snapshot_array))) 2119 ret_data_len = snapshot_in.snapshot_array_size + 2120 sizeof(struct smb_snapshot_array); 2121 2122 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2123 rc = -EFAULT; 2124 } 2125 2126 kfree(retbuf); 2127 return rc; 2128 } 2129 2130 2131 2132 static int 2133 smb3_notify(const unsigned int xid, struct file *pfile, 2134 void __user *ioc_buf, bool return_changes) 2135 { 2136 struct smb3_notify_info notify; 2137 struct smb3_notify_info __user *pnotify_buf; 2138 struct dentry *dentry = pfile->f_path.dentry; 2139 struct inode *inode = file_inode(pfile); 2140 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2141 struct cifs_open_parms oparms; 2142 struct cifs_fid fid; 2143 struct cifs_tcon *tcon; 2144 const unsigned char *path; 2145 char *returned_ioctl_info = NULL; 2146 void *page = alloc_dentry_path(); 2147 __le16 *utf16_path = NULL; 2148 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2149 int rc = 0; 2150 __u32 ret_len = 0; 2151 2152 path = build_path_from_dentry(dentry, page); 2153 if (IS_ERR(path)) { 2154 rc = PTR_ERR(path); 2155 goto notify_exit; 2156 } 2157 2158 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2159 if (utf16_path == NULL) { 2160 rc = -ENOMEM; 2161 goto notify_exit; 2162 } 2163 2164 if (return_changes) { 2165 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2166 rc = -EFAULT; 2167 goto notify_exit; 2168 } 2169 } else { 2170 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2171 rc = -EFAULT; 2172 goto notify_exit; 2173 } 2174 notify.data_len = 0; 2175 } 2176 2177 tcon = cifs_sb_master_tcon(cifs_sb); 2178 oparms = (struct cifs_open_parms) { 2179 .tcon = tcon, 2180 .path = path, 2181 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2182 .disposition = FILE_OPEN, 2183 .create_options = cifs_create_options(cifs_sb, 0), 2184 .fid = &fid, 2185 }; 2186 2187 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2188 NULL); 2189 if (rc) 2190 goto notify_exit; 2191 2192 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2193 notify.watch_tree, notify.completion_filter, 2194 notify.data_len, &returned_ioctl_info, &ret_len); 2195 2196 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2197 2198 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2199 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2200 if (ret_len > notify.data_len) 2201 ret_len = notify.data_len; 2202 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2203 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2204 rc = -EFAULT; 2205 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2206 rc = -EFAULT; 2207 } 2208 kfree(returned_ioctl_info); 2209 notify_exit: 2210 free_dentry_path(page); 2211 kfree(utf16_path); 2212 return rc; 2213 } 2214 2215 static int 2216 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2217 const char *path, struct cifs_sb_info *cifs_sb, 2218 struct cifs_fid *fid, __u16 search_flags, 2219 struct cifs_search_info *srch_inf) 2220 { 2221 __le16 *utf16_path; 2222 struct smb_rqst rqst[2]; 2223 struct kvec rsp_iov[2]; 2224 int resp_buftype[2]; 2225 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2226 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2227 int rc, flags = 0; 2228 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2229 struct cifs_open_parms oparms; 2230 struct smb2_query_directory_rsp *qd_rsp = NULL; 2231 struct smb2_create_rsp *op_rsp = NULL; 2232 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2233 int retry_count = 0; 2234 2235 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2236 if (!utf16_path) 2237 return -ENOMEM; 2238 2239 if (smb3_encryption_required(tcon)) 2240 flags |= CIFS_TRANSFORM_REQ; 2241 2242 memset(rqst, 0, sizeof(rqst)); 2243 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2244 memset(rsp_iov, 0, sizeof(rsp_iov)); 2245 2246 /* Open */ 2247 memset(&open_iov, 0, sizeof(open_iov)); 2248 rqst[0].rq_iov = open_iov; 2249 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2250 2251 oparms = (struct cifs_open_parms) { 2252 .tcon = tcon, 2253 .path = path, 2254 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2255 .disposition = FILE_OPEN, 2256 .create_options = cifs_create_options(cifs_sb, 0), 2257 .fid = fid, 2258 }; 2259 2260 rc = SMB2_open_init(tcon, server, 2261 &rqst[0], &oplock, &oparms, utf16_path); 2262 if (rc) 2263 goto qdf_free; 2264 smb2_set_next_command(tcon, &rqst[0]); 2265 2266 /* Query directory */ 2267 srch_inf->entries_in_buffer = 0; 2268 srch_inf->index_of_last_entry = 2; 2269 2270 memset(&qd_iov, 0, sizeof(qd_iov)); 2271 rqst[1].rq_iov = qd_iov; 2272 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2273 2274 rc = SMB2_query_directory_init(xid, tcon, server, 2275 &rqst[1], 2276 COMPOUND_FID, COMPOUND_FID, 2277 0, srch_inf->info_level); 2278 if (rc) 2279 goto qdf_free; 2280 2281 smb2_set_related(&rqst[1]); 2282 2283 again: 2284 rc = compound_send_recv(xid, tcon->ses, server, 2285 flags, 2, rqst, 2286 resp_buftype, rsp_iov); 2287 2288 if (rc == -EAGAIN && retry_count++ < 10) 2289 goto again; 2290 2291 /* If the open failed there is nothing to do */ 2292 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2293 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2294 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2295 goto qdf_free; 2296 } 2297 fid->persistent_fid = op_rsp->PersistentFileId; 2298 fid->volatile_fid = op_rsp->VolatileFileId; 2299 2300 /* Anything else than ENODATA means a genuine error */ 2301 if (rc && rc != -ENODATA) { 2302 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2303 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2304 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2305 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2306 goto qdf_free; 2307 } 2308 2309 atomic_inc(&tcon->num_remote_opens); 2310 2311 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2312 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2313 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2314 tcon->tid, tcon->ses->Suid, 0, 0); 2315 srch_inf->endOfSearch = true; 2316 rc = 0; 2317 goto qdf_free; 2318 } 2319 2320 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2321 srch_inf); 2322 if (rc) { 2323 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2324 tcon->ses->Suid, 0, 0, rc); 2325 goto qdf_free; 2326 } 2327 resp_buftype[1] = CIFS_NO_BUFFER; 2328 2329 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2330 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2331 2332 qdf_free: 2333 kfree(utf16_path); 2334 SMB2_open_free(&rqst[0]); 2335 SMB2_query_directory_free(&rqst[1]); 2336 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2337 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2338 return rc; 2339 } 2340 2341 static int 2342 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2343 struct cifs_fid *fid, __u16 search_flags, 2344 struct cifs_search_info *srch_inf) 2345 { 2346 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2347 fid->volatile_fid, 0, srch_inf); 2348 } 2349 2350 static int 2351 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2352 struct cifs_fid *fid) 2353 { 2354 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2355 } 2356 2357 /* 2358 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2359 * the number of credits and return true. Otherwise - return false. 2360 */ 2361 static bool 2362 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2363 { 2364 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2365 int scredits, in_flight; 2366 2367 if (shdr->Status != STATUS_PENDING) 2368 return false; 2369 2370 if (shdr->CreditRequest) { 2371 spin_lock(&server->req_lock); 2372 server->credits += le16_to_cpu(shdr->CreditRequest); 2373 scredits = server->credits; 2374 in_flight = server->in_flight; 2375 spin_unlock(&server->req_lock); 2376 wake_up(&server->request_q); 2377 2378 trace_smb3_pend_credits(server->CurrentMid, 2379 server->conn_id, server->hostname, scredits, 2380 le16_to_cpu(shdr->CreditRequest), in_flight); 2381 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2382 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2383 } 2384 2385 return true; 2386 } 2387 2388 static bool 2389 smb2_is_session_expired(char *buf) 2390 { 2391 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2392 2393 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2394 shdr->Status != STATUS_USER_SESSION_DELETED) 2395 return false; 2396 2397 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2398 le64_to_cpu(shdr->SessionId), 2399 le16_to_cpu(shdr->Command), 2400 le64_to_cpu(shdr->MessageId)); 2401 cifs_dbg(FYI, "Session expired or deleted\n"); 2402 2403 return true; 2404 } 2405 2406 static bool 2407 smb2_is_status_io_timeout(char *buf) 2408 { 2409 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2410 2411 if (shdr->Status == STATUS_IO_TIMEOUT) 2412 return true; 2413 else 2414 return false; 2415 } 2416 2417 static bool 2418 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2419 { 2420 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2421 struct TCP_Server_Info *pserver; 2422 struct cifs_ses *ses; 2423 struct cifs_tcon *tcon; 2424 2425 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2426 return false; 2427 2428 /* If server is a channel, select the primary channel */ 2429 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2430 2431 spin_lock(&cifs_tcp_ses_lock); 2432 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2433 if (cifs_ses_exiting(ses)) 2434 continue; 2435 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2436 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2437 spin_lock(&tcon->tc_lock); 2438 tcon->need_reconnect = true; 2439 spin_unlock(&tcon->tc_lock); 2440 spin_unlock(&cifs_tcp_ses_lock); 2441 pr_warn_once("Server share %s deleted.\n", 2442 tcon->tree_name); 2443 return true; 2444 } 2445 } 2446 } 2447 spin_unlock(&cifs_tcp_ses_lock); 2448 2449 return false; 2450 } 2451 2452 static int 2453 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2454 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2455 { 2456 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2457 return SMB2_lease_break(0, tcon, cinode->lease_key, 2458 smb2_get_lease_state(cinode)); 2459 2460 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2461 CIFS_CACHE_READ(cinode) ? 1 : 0); 2462 } 2463 2464 void 2465 smb2_set_related(struct smb_rqst *rqst) 2466 { 2467 struct smb2_hdr *shdr; 2468 2469 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2470 if (shdr == NULL) { 2471 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2472 return; 2473 } 2474 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2475 } 2476 2477 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2478 2479 void 2480 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2481 { 2482 struct smb2_hdr *shdr; 2483 struct cifs_ses *ses = tcon->ses; 2484 struct TCP_Server_Info *server = ses->server; 2485 unsigned long len = smb_rqst_len(server, rqst); 2486 int i, num_padding; 2487 2488 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2489 if (shdr == NULL) { 2490 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2491 return; 2492 } 2493 2494 /* SMB headers in a compound are 8 byte aligned. */ 2495 2496 /* No padding needed */ 2497 if (!(len & 7)) 2498 goto finished; 2499 2500 num_padding = 8 - (len & 7); 2501 if (!smb3_encryption_required(tcon)) { 2502 /* 2503 * If we do not have encryption then we can just add an extra 2504 * iov for the padding. 2505 */ 2506 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2507 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2508 rqst->rq_nvec++; 2509 len += num_padding; 2510 } else { 2511 /* 2512 * We can not add a small padding iov for the encryption case 2513 * because the encryption framework can not handle the padding 2514 * iovs. 2515 * We have to flatten this into a single buffer and add 2516 * the padding to it. 2517 */ 2518 for (i = 1; i < rqst->rq_nvec; i++) { 2519 memcpy(rqst->rq_iov[0].iov_base + 2520 rqst->rq_iov[0].iov_len, 2521 rqst->rq_iov[i].iov_base, 2522 rqst->rq_iov[i].iov_len); 2523 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2524 } 2525 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2526 0, num_padding); 2527 rqst->rq_iov[0].iov_len += num_padding; 2528 len += num_padding; 2529 rqst->rq_nvec = 1; 2530 } 2531 2532 finished: 2533 shdr->NextCommand = cpu_to_le32(len); 2534 } 2535 2536 /* 2537 * Passes the query info response back to the caller on success. 2538 * Caller need to free this with free_rsp_buf(). 2539 */ 2540 int 2541 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2542 const char *path, u32 desired_access, 2543 u32 class, u32 type, u32 output_len, 2544 struct kvec *rsp, int *buftype, 2545 struct cifs_sb_info *cifs_sb) 2546 { 2547 struct smb2_compound_vars *vars; 2548 struct cifs_ses *ses = tcon->ses; 2549 struct TCP_Server_Info *server = cifs_pick_channel(ses); 2550 int flags = CIFS_CP_CREATE_CLOSE_OP; 2551 struct smb_rqst *rqst; 2552 int resp_buftype[3]; 2553 struct kvec *rsp_iov; 2554 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2555 struct cifs_open_parms oparms; 2556 struct cifs_fid fid; 2557 int rc; 2558 __le16 *utf16_path; 2559 struct cached_fid *cfid = NULL; 2560 2561 if (!path) 2562 path = ""; 2563 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2564 if (!utf16_path) 2565 return -ENOMEM; 2566 2567 if (smb3_encryption_required(tcon)) 2568 flags |= CIFS_TRANSFORM_REQ; 2569 2570 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2571 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2572 if (!vars) { 2573 rc = -ENOMEM; 2574 goto out_free_path; 2575 } 2576 rqst = vars->rqst; 2577 rsp_iov = vars->rsp_iov; 2578 2579 /* 2580 * We can only call this for things we know are directories. 2581 */ 2582 if (!strcmp(path, "")) 2583 open_cached_dir(xid, tcon, path, cifs_sb, false, 2584 &cfid); /* cfid null if open dir failed */ 2585 2586 rqst[0].rq_iov = vars->open_iov; 2587 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2588 2589 oparms = (struct cifs_open_parms) { 2590 .tcon = tcon, 2591 .path = path, 2592 .desired_access = desired_access, 2593 .disposition = FILE_OPEN, 2594 .create_options = cifs_create_options(cifs_sb, 0), 2595 .fid = &fid, 2596 }; 2597 2598 rc = SMB2_open_init(tcon, server, 2599 &rqst[0], &oplock, &oparms, utf16_path); 2600 if (rc) 2601 goto qic_exit; 2602 smb2_set_next_command(tcon, &rqst[0]); 2603 2604 rqst[1].rq_iov = &vars->qi_iov; 2605 rqst[1].rq_nvec = 1; 2606 2607 if (cfid) { 2608 rc = SMB2_query_info_init(tcon, server, 2609 &rqst[1], 2610 cfid->fid.persistent_fid, 2611 cfid->fid.volatile_fid, 2612 class, type, 0, 2613 output_len, 0, 2614 NULL); 2615 } else { 2616 rc = SMB2_query_info_init(tcon, server, 2617 &rqst[1], 2618 COMPOUND_FID, 2619 COMPOUND_FID, 2620 class, type, 0, 2621 output_len, 0, 2622 NULL); 2623 } 2624 if (rc) 2625 goto qic_exit; 2626 if (!cfid) { 2627 smb2_set_next_command(tcon, &rqst[1]); 2628 smb2_set_related(&rqst[1]); 2629 } 2630 2631 rqst[2].rq_iov = &vars->close_iov; 2632 rqst[2].rq_nvec = 1; 2633 2634 rc = SMB2_close_init(tcon, server, 2635 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2636 if (rc) 2637 goto qic_exit; 2638 smb2_set_related(&rqst[2]); 2639 2640 if (cfid) { 2641 rc = compound_send_recv(xid, ses, server, 2642 flags, 1, &rqst[1], 2643 &resp_buftype[1], &rsp_iov[1]); 2644 } else { 2645 rc = compound_send_recv(xid, ses, server, 2646 flags, 3, rqst, 2647 resp_buftype, rsp_iov); 2648 } 2649 if (rc) { 2650 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2651 if (rc == -EREMCHG) { 2652 tcon->need_reconnect = true; 2653 pr_warn_once("server share %s deleted\n", 2654 tcon->tree_name); 2655 } 2656 goto qic_exit; 2657 } 2658 *rsp = rsp_iov[1]; 2659 *buftype = resp_buftype[1]; 2660 2661 qic_exit: 2662 SMB2_open_free(&rqst[0]); 2663 SMB2_query_info_free(&rqst[1]); 2664 SMB2_close_free(&rqst[2]); 2665 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2666 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2667 if (cfid) 2668 close_cached_dir(cfid); 2669 kfree(vars); 2670 out_free_path: 2671 kfree(utf16_path); 2672 return rc; 2673 } 2674 2675 static int 2676 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2677 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2678 { 2679 struct smb2_query_info_rsp *rsp; 2680 struct smb2_fs_full_size_info *info = NULL; 2681 struct kvec rsp_iov = {NULL, 0}; 2682 int buftype = CIFS_NO_BUFFER; 2683 int rc; 2684 2685 2686 rc = smb2_query_info_compound(xid, tcon, "", 2687 FILE_READ_ATTRIBUTES, 2688 FS_FULL_SIZE_INFORMATION, 2689 SMB2_O_INFO_FILESYSTEM, 2690 sizeof(struct smb2_fs_full_size_info), 2691 &rsp_iov, &buftype, cifs_sb); 2692 if (rc) 2693 goto qfs_exit; 2694 2695 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2696 buf->f_type = SMB2_SUPER_MAGIC; 2697 info = (struct smb2_fs_full_size_info *)( 2698 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2699 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2700 le32_to_cpu(rsp->OutputBufferLength), 2701 &rsp_iov, 2702 sizeof(struct smb2_fs_full_size_info)); 2703 if (!rc) 2704 smb2_copy_fs_info_to_kstatfs(info, buf); 2705 2706 qfs_exit: 2707 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2708 free_rsp_buf(buftype, rsp_iov.iov_base); 2709 return rc; 2710 } 2711 2712 static int 2713 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2714 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2715 { 2716 int rc; 2717 __le16 srch_path = 0; /* Null - open root of share */ 2718 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2719 struct cifs_open_parms oparms; 2720 struct cifs_fid fid; 2721 2722 if (!tcon->posix_extensions) 2723 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2724 2725 oparms = (struct cifs_open_parms) { 2726 .tcon = tcon, 2727 .path = "", 2728 .desired_access = FILE_READ_ATTRIBUTES, 2729 .disposition = FILE_OPEN, 2730 .create_options = cifs_create_options(cifs_sb, 0), 2731 .fid = &fid, 2732 }; 2733 2734 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2735 NULL, NULL); 2736 if (rc) 2737 return rc; 2738 2739 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2740 fid.volatile_fid, buf); 2741 buf->f_type = SMB2_SUPER_MAGIC; 2742 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2743 return rc; 2744 } 2745 2746 static bool 2747 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2748 { 2749 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2750 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2751 } 2752 2753 static int 2754 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2755 __u64 length, __u32 type, int lock, int unlock, bool wait) 2756 { 2757 if (unlock && !lock) 2758 type = SMB2_LOCKFLAG_UNLOCK; 2759 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2760 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2761 current->tgid, length, offset, type, wait); 2762 } 2763 2764 static void 2765 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2766 { 2767 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2768 } 2769 2770 static void 2771 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2772 { 2773 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2774 } 2775 2776 static void 2777 smb2_new_lease_key(struct cifs_fid *fid) 2778 { 2779 generate_random_uuid(fid->lease_key); 2780 } 2781 2782 static int 2783 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2784 const char *search_name, 2785 struct dfs_info3_param **target_nodes, 2786 unsigned int *num_of_nodes, 2787 const struct nls_table *nls_codepage, int remap) 2788 { 2789 int rc; 2790 __le16 *utf16_path = NULL; 2791 int utf16_path_len = 0; 2792 struct cifs_tcon *tcon; 2793 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2794 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2795 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2796 int retry_count = 0; 2797 2798 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2799 2800 /* 2801 * Try to use the IPC tcon, otherwise just use any 2802 */ 2803 tcon = ses->tcon_ipc; 2804 if (tcon == NULL) { 2805 spin_lock(&cifs_tcp_ses_lock); 2806 tcon = list_first_entry_or_null(&ses->tcon_list, 2807 struct cifs_tcon, 2808 tcon_list); 2809 if (tcon) 2810 tcon->tc_count++; 2811 spin_unlock(&cifs_tcp_ses_lock); 2812 } 2813 2814 if (tcon == NULL) { 2815 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2816 ses); 2817 rc = -ENOTCONN; 2818 goto out; 2819 } 2820 2821 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2822 &utf16_path_len, 2823 nls_codepage, remap); 2824 if (!utf16_path) { 2825 rc = -ENOMEM; 2826 goto out; 2827 } 2828 2829 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2830 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2831 if (!dfs_req) { 2832 rc = -ENOMEM; 2833 goto out; 2834 } 2835 2836 /* Highest DFS referral version understood */ 2837 dfs_req->MaxReferralLevel = DFS_VERSION; 2838 2839 /* Path to resolve in an UTF-16 null-terminated string */ 2840 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2841 2842 do { 2843 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2844 FSCTL_DFS_GET_REFERRALS, 2845 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2846 (char **)&dfs_rsp, &dfs_rsp_size); 2847 if (!is_retryable_error(rc)) 2848 break; 2849 usleep_range(512, 2048); 2850 } while (++retry_count < 5); 2851 2852 if (!rc && !dfs_rsp) 2853 rc = -EIO; 2854 if (rc) { 2855 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2856 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2857 goto out; 2858 } 2859 2860 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2861 num_of_nodes, target_nodes, 2862 nls_codepage, remap, search_name, 2863 true /* is_unicode */); 2864 if (rc) { 2865 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2866 goto out; 2867 } 2868 2869 out: 2870 if (tcon && !tcon->ipc) { 2871 /* ipc tcons are not refcounted */ 2872 spin_lock(&cifs_tcp_ses_lock); 2873 tcon->tc_count--; 2874 /* tc_count can never go negative */ 2875 WARN_ON(tcon->tc_count < 0); 2876 spin_unlock(&cifs_tcp_ses_lock); 2877 } 2878 kfree(utf16_path); 2879 kfree(dfs_req); 2880 kfree(dfs_rsp); 2881 return rc; 2882 } 2883 2884 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2885 static int parse_reparse_posix(struct reparse_posix_data *buf, 2886 struct cifs_sb_info *cifs_sb, 2887 struct cifs_open_info_data *data) 2888 { 2889 unsigned int len; 2890 u64 type; 2891 2892 switch ((type = le64_to_cpu(buf->InodeType))) { 2893 case NFS_SPECFILE_LNK: 2894 len = le16_to_cpu(buf->ReparseDataLength); 2895 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer, 2896 len, true, 2897 cifs_sb->local_nls); 2898 if (!data->symlink_target) 2899 return -ENOMEM; 2900 convert_delimiter(data->symlink_target, '/'); 2901 cifs_dbg(FYI, "%s: target path: %s\n", 2902 __func__, data->symlink_target); 2903 break; 2904 case NFS_SPECFILE_CHR: 2905 case NFS_SPECFILE_BLK: 2906 case NFS_SPECFILE_FIFO: 2907 case NFS_SPECFILE_SOCK: 2908 break; 2909 default: 2910 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n", 2911 __func__, type); 2912 return -EOPNOTSUPP; 2913 } 2914 return 0; 2915 } 2916 2917 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym, 2918 u32 plen, bool unicode, 2919 struct cifs_sb_info *cifs_sb, 2920 struct cifs_open_info_data *data) 2921 { 2922 unsigned int len; 2923 unsigned int offs; 2924 2925 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 2926 2927 offs = le16_to_cpu(sym->SubstituteNameOffset); 2928 len = le16_to_cpu(sym->SubstituteNameLength); 2929 if (offs + 20 > plen || offs + len + 20 > plen) { 2930 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 2931 return -EIO; 2932 } 2933 2934 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs, 2935 len, unicode, 2936 cifs_sb->local_nls); 2937 if (!data->symlink_target) 2938 return -ENOMEM; 2939 2940 convert_delimiter(data->symlink_target, '/'); 2941 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target); 2942 2943 return 0; 2944 } 2945 2946 int parse_reparse_point(struct reparse_data_buffer *buf, 2947 u32 plen, struct cifs_sb_info *cifs_sb, 2948 bool unicode, struct cifs_open_info_data *data) 2949 { 2950 if (plen < sizeof(*buf)) { 2951 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n", 2952 __func__, plen); 2953 return -EIO; 2954 } 2955 2956 if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) { 2957 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n", 2958 __func__, plen); 2959 return -EIO; 2960 } 2961 2962 data->reparse.buf = buf; 2963 2964 /* See MS-FSCC 2.1.2 */ 2965 switch (le32_to_cpu(buf->ReparseTag)) { 2966 case IO_REPARSE_TAG_NFS: 2967 return parse_reparse_posix((struct reparse_posix_data *)buf, 2968 cifs_sb, data); 2969 case IO_REPARSE_TAG_SYMLINK: 2970 return parse_reparse_symlink( 2971 (struct reparse_symlink_data_buffer *)buf, 2972 plen, unicode, cifs_sb, data); 2973 case IO_REPARSE_TAG_LX_SYMLINK: 2974 case IO_REPARSE_TAG_AF_UNIX: 2975 case IO_REPARSE_TAG_LX_FIFO: 2976 case IO_REPARSE_TAG_LX_CHR: 2977 case IO_REPARSE_TAG_LX_BLK: 2978 return 0; 2979 default: 2980 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n", 2981 __func__, le32_to_cpu(buf->ReparseTag)); 2982 return -EOPNOTSUPP; 2983 } 2984 } 2985 2986 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, 2987 struct kvec *rsp_iov, 2988 struct cifs_open_info_data *data) 2989 { 2990 struct reparse_data_buffer *buf; 2991 struct smb2_ioctl_rsp *io = rsp_iov->iov_base; 2992 u32 plen = le32_to_cpu(io->OutputCount); 2993 2994 buf = (struct reparse_data_buffer *)((u8 *)io + 2995 le32_to_cpu(io->OutputOffset)); 2996 return parse_reparse_point(buf, plen, cifs_sb, true, data); 2997 } 2998 2999 static struct cifs_ntsd * 3000 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3001 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3002 { 3003 struct cifs_ntsd *pntsd = NULL; 3004 unsigned int xid; 3005 int rc = -EOPNOTSUPP; 3006 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3007 3008 if (IS_ERR(tlink)) 3009 return ERR_CAST(tlink); 3010 3011 xid = get_xid(); 3012 cifs_dbg(FYI, "trying to get acl\n"); 3013 3014 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3015 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3016 info); 3017 free_xid(xid); 3018 3019 cifs_put_tlink(tlink); 3020 3021 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3022 if (rc) 3023 return ERR_PTR(rc); 3024 return pntsd; 3025 3026 } 3027 3028 static struct cifs_ntsd * 3029 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3030 const char *path, u32 *pacllen, u32 info) 3031 { 3032 struct cifs_ntsd *pntsd = NULL; 3033 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3034 unsigned int xid; 3035 int rc; 3036 struct cifs_tcon *tcon; 3037 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3038 struct cifs_fid fid; 3039 struct cifs_open_parms oparms; 3040 __le16 *utf16_path; 3041 3042 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3043 if (IS_ERR(tlink)) 3044 return ERR_CAST(tlink); 3045 3046 tcon = tlink_tcon(tlink); 3047 xid = get_xid(); 3048 3049 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3050 if (!utf16_path) { 3051 rc = -ENOMEM; 3052 free_xid(xid); 3053 return ERR_PTR(rc); 3054 } 3055 3056 oparms = (struct cifs_open_parms) { 3057 .tcon = tcon, 3058 .path = path, 3059 .desired_access = READ_CONTROL, 3060 .disposition = FILE_OPEN, 3061 /* 3062 * When querying an ACL, even if the file is a symlink 3063 * we want to open the source not the target, and so 3064 * the protocol requires that the client specify this 3065 * flag when opening a reparse point 3066 */ 3067 .create_options = cifs_create_options(cifs_sb, 0) | 3068 OPEN_REPARSE_POINT, 3069 .fid = &fid, 3070 }; 3071 3072 if (info & SACL_SECINFO) 3073 oparms.desired_access |= SYSTEM_SECURITY; 3074 3075 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3076 NULL); 3077 kfree(utf16_path); 3078 if (!rc) { 3079 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3080 fid.volatile_fid, (void **)&pntsd, pacllen, 3081 info); 3082 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3083 } 3084 3085 cifs_put_tlink(tlink); 3086 free_xid(xid); 3087 3088 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3089 if (rc) 3090 return ERR_PTR(rc); 3091 return pntsd; 3092 } 3093 3094 static int 3095 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3096 struct inode *inode, const char *path, int aclflag) 3097 { 3098 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3099 unsigned int xid; 3100 int rc, access_flags = 0; 3101 struct cifs_tcon *tcon; 3102 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3103 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3104 struct cifs_fid fid; 3105 struct cifs_open_parms oparms; 3106 __le16 *utf16_path; 3107 3108 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3109 if (IS_ERR(tlink)) 3110 return PTR_ERR(tlink); 3111 3112 tcon = tlink_tcon(tlink); 3113 xid = get_xid(); 3114 3115 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3116 access_flags |= WRITE_OWNER; 3117 if (aclflag & CIFS_ACL_SACL) 3118 access_flags |= SYSTEM_SECURITY; 3119 if (aclflag & CIFS_ACL_DACL) 3120 access_flags |= WRITE_DAC; 3121 3122 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3123 if (!utf16_path) { 3124 rc = -ENOMEM; 3125 free_xid(xid); 3126 return rc; 3127 } 3128 3129 oparms = (struct cifs_open_parms) { 3130 .tcon = tcon, 3131 .desired_access = access_flags, 3132 .create_options = cifs_create_options(cifs_sb, 0), 3133 .disposition = FILE_OPEN, 3134 .path = path, 3135 .fid = &fid, 3136 }; 3137 3138 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3139 NULL, NULL); 3140 kfree(utf16_path); 3141 if (!rc) { 3142 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3143 fid.volatile_fid, pnntsd, acllen, aclflag); 3144 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3145 } 3146 3147 cifs_put_tlink(tlink); 3148 free_xid(xid); 3149 return rc; 3150 } 3151 3152 /* Retrieve an ACL from the server */ 3153 static struct cifs_ntsd * 3154 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3155 struct inode *inode, const char *path, 3156 u32 *pacllen, u32 info) 3157 { 3158 struct cifs_ntsd *pntsd = NULL; 3159 struct cifsFileInfo *open_file = NULL; 3160 3161 if (inode && !(info & SACL_SECINFO)) 3162 open_file = find_readable_file(CIFS_I(inode), true); 3163 if (!open_file || (info & SACL_SECINFO)) 3164 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3165 3166 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3167 cifsFileInfo_put(open_file); 3168 return pntsd; 3169 } 3170 3171 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3172 loff_t offset, loff_t len, unsigned int xid) 3173 { 3174 struct cifsFileInfo *cfile = file->private_data; 3175 struct file_zero_data_information fsctl_buf; 3176 3177 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3178 3179 fsctl_buf.FileOffset = cpu_to_le64(offset); 3180 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3181 3182 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3183 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3184 (char *)&fsctl_buf, 3185 sizeof(struct file_zero_data_information), 3186 0, NULL, NULL); 3187 } 3188 3189 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3190 loff_t offset, loff_t len, bool keep_size) 3191 { 3192 struct cifs_ses *ses = tcon->ses; 3193 struct inode *inode = file_inode(file); 3194 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3195 struct cifsFileInfo *cfile = file->private_data; 3196 unsigned long long new_size; 3197 long rc; 3198 unsigned int xid; 3199 __le64 eof; 3200 3201 xid = get_xid(); 3202 3203 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3204 ses->Suid, offset, len); 3205 3206 inode_lock(inode); 3207 filemap_invalidate_lock(inode->i_mapping); 3208 3209 /* 3210 * We zero the range through ioctl, so we need remove the page caches 3211 * first, otherwise the data may be inconsistent with the server. 3212 */ 3213 truncate_pagecache_range(inode, offset, offset + len - 1); 3214 3215 /* if file not oplocked can't be sure whether asking to extend size */ 3216 rc = -EOPNOTSUPP; 3217 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3218 goto zero_range_exit; 3219 3220 rc = smb3_zero_data(file, tcon, offset, len, xid); 3221 if (rc < 0) 3222 goto zero_range_exit; 3223 3224 /* 3225 * do we also need to change the size of the file? 3226 */ 3227 new_size = offset + len; 3228 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3229 eof = cpu_to_le64(new_size); 3230 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3231 cfile->fid.volatile_fid, cfile->pid, &eof); 3232 if (rc >= 0) { 3233 truncate_setsize(inode, new_size); 3234 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3235 } 3236 } 3237 3238 zero_range_exit: 3239 filemap_invalidate_unlock(inode->i_mapping); 3240 inode_unlock(inode); 3241 free_xid(xid); 3242 if (rc) 3243 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3244 ses->Suid, offset, len, rc); 3245 else 3246 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3247 ses->Suid, offset, len); 3248 return rc; 3249 } 3250 3251 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3252 loff_t offset, loff_t len) 3253 { 3254 struct inode *inode = file_inode(file); 3255 struct cifsFileInfo *cfile = file->private_data; 3256 struct file_zero_data_information fsctl_buf; 3257 long rc; 3258 unsigned int xid; 3259 __u8 set_sparse = 1; 3260 3261 xid = get_xid(); 3262 3263 inode_lock(inode); 3264 /* Need to make file sparse, if not already, before freeing range. */ 3265 /* Consider adding equivalent for compressed since it could also work */ 3266 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3267 rc = -EOPNOTSUPP; 3268 goto out; 3269 } 3270 3271 filemap_invalidate_lock(inode->i_mapping); 3272 /* 3273 * We implement the punch hole through ioctl, so we need remove the page 3274 * caches first, otherwise the data may be inconsistent with the server. 3275 */ 3276 truncate_pagecache_range(inode, offset, offset + len - 1); 3277 3278 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3279 3280 fsctl_buf.FileOffset = cpu_to_le64(offset); 3281 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3282 3283 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3284 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3285 (char *)&fsctl_buf, 3286 sizeof(struct file_zero_data_information), 3287 CIFSMaxBufSize, NULL, NULL); 3288 filemap_invalidate_unlock(inode->i_mapping); 3289 out: 3290 inode_unlock(inode); 3291 free_xid(xid); 3292 return rc; 3293 } 3294 3295 static int smb3_simple_fallocate_write_range(unsigned int xid, 3296 struct cifs_tcon *tcon, 3297 struct cifsFileInfo *cfile, 3298 loff_t off, loff_t len, 3299 char *buf) 3300 { 3301 struct cifs_io_parms io_parms = {0}; 3302 int nbytes; 3303 int rc = 0; 3304 struct kvec iov[2]; 3305 3306 io_parms.netfid = cfile->fid.netfid; 3307 io_parms.pid = current->tgid; 3308 io_parms.tcon = tcon; 3309 io_parms.persistent_fid = cfile->fid.persistent_fid; 3310 io_parms.volatile_fid = cfile->fid.volatile_fid; 3311 3312 while (len) { 3313 io_parms.offset = off; 3314 io_parms.length = len; 3315 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3316 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3317 /* iov[0] is reserved for smb header */ 3318 iov[1].iov_base = buf; 3319 iov[1].iov_len = io_parms.length; 3320 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3321 if (rc) 3322 break; 3323 if (nbytes > len) 3324 return -EINVAL; 3325 buf += nbytes; 3326 off += nbytes; 3327 len -= nbytes; 3328 } 3329 return rc; 3330 } 3331 3332 static int smb3_simple_fallocate_range(unsigned int xid, 3333 struct cifs_tcon *tcon, 3334 struct cifsFileInfo *cfile, 3335 loff_t off, loff_t len) 3336 { 3337 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3338 u32 out_data_len; 3339 char *buf = NULL; 3340 loff_t l; 3341 int rc; 3342 3343 in_data.file_offset = cpu_to_le64(off); 3344 in_data.length = cpu_to_le64(len); 3345 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3346 cfile->fid.volatile_fid, 3347 FSCTL_QUERY_ALLOCATED_RANGES, 3348 (char *)&in_data, sizeof(in_data), 3349 1024 * sizeof(struct file_allocated_range_buffer), 3350 (char **)&out_data, &out_data_len); 3351 if (rc) 3352 goto out; 3353 3354 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3355 if (buf == NULL) { 3356 rc = -ENOMEM; 3357 goto out; 3358 } 3359 3360 tmp_data = out_data; 3361 while (len) { 3362 /* 3363 * The rest of the region is unmapped so write it all. 3364 */ 3365 if (out_data_len == 0) { 3366 rc = smb3_simple_fallocate_write_range(xid, tcon, 3367 cfile, off, len, buf); 3368 goto out; 3369 } 3370 3371 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3372 rc = -EINVAL; 3373 goto out; 3374 } 3375 3376 if (off < le64_to_cpu(tmp_data->file_offset)) { 3377 /* 3378 * We are at a hole. Write until the end of the region 3379 * or until the next allocated data, 3380 * whichever comes next. 3381 */ 3382 l = le64_to_cpu(tmp_data->file_offset) - off; 3383 if (len < l) 3384 l = len; 3385 rc = smb3_simple_fallocate_write_range(xid, tcon, 3386 cfile, off, l, buf); 3387 if (rc) 3388 goto out; 3389 off = off + l; 3390 len = len - l; 3391 if (len == 0) 3392 goto out; 3393 } 3394 /* 3395 * We are at a section of allocated data, just skip forward 3396 * until the end of the data or the end of the region 3397 * we are supposed to fallocate, whichever comes first. 3398 */ 3399 l = le64_to_cpu(tmp_data->length); 3400 if (len < l) 3401 l = len; 3402 off += l; 3403 len -= l; 3404 3405 tmp_data = &tmp_data[1]; 3406 out_data_len -= sizeof(struct file_allocated_range_buffer); 3407 } 3408 3409 out: 3410 kfree(out_data); 3411 kfree(buf); 3412 return rc; 3413 } 3414 3415 3416 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3417 loff_t off, loff_t len, bool keep_size) 3418 { 3419 struct inode *inode; 3420 struct cifsInodeInfo *cifsi; 3421 struct cifsFileInfo *cfile = file->private_data; 3422 long rc = -EOPNOTSUPP; 3423 unsigned int xid; 3424 __le64 eof; 3425 3426 xid = get_xid(); 3427 3428 inode = d_inode(cfile->dentry); 3429 cifsi = CIFS_I(inode); 3430 3431 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3432 tcon->ses->Suid, off, len); 3433 /* if file not oplocked can't be sure whether asking to extend size */ 3434 if (!CIFS_CACHE_READ(cifsi)) 3435 if (keep_size == false) { 3436 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3437 tcon->tid, tcon->ses->Suid, off, len, rc); 3438 free_xid(xid); 3439 return rc; 3440 } 3441 3442 /* 3443 * Extending the file 3444 */ 3445 if ((keep_size == false) && i_size_read(inode) < off + len) { 3446 rc = inode_newsize_ok(inode, off + len); 3447 if (rc) 3448 goto out; 3449 3450 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3451 smb2_set_sparse(xid, tcon, cfile, inode, false); 3452 3453 eof = cpu_to_le64(off + len); 3454 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3455 cfile->fid.volatile_fid, cfile->pid, &eof); 3456 if (rc == 0) { 3457 cifsi->server_eof = off + len; 3458 cifs_setsize(inode, off + len); 3459 cifs_truncate_page(inode->i_mapping, inode->i_size); 3460 truncate_setsize(inode, off + len); 3461 } 3462 goto out; 3463 } 3464 3465 /* 3466 * Files are non-sparse by default so falloc may be a no-op 3467 * Must check if file sparse. If not sparse, and since we are not 3468 * extending then no need to do anything since file already allocated 3469 */ 3470 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3471 rc = 0; 3472 goto out; 3473 } 3474 3475 if (keep_size == true) { 3476 /* 3477 * We can not preallocate pages beyond the end of the file 3478 * in SMB2 3479 */ 3480 if (off >= i_size_read(inode)) { 3481 rc = 0; 3482 goto out; 3483 } 3484 /* 3485 * For fallocates that are partially beyond the end of file, 3486 * clamp len so we only fallocate up to the end of file. 3487 */ 3488 if (off + len > i_size_read(inode)) { 3489 len = i_size_read(inode) - off; 3490 } 3491 } 3492 3493 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3494 /* 3495 * At this point, we are trying to fallocate an internal 3496 * regions of a sparse file. Since smb2 does not have a 3497 * fallocate command we have two otions on how to emulate this. 3498 * We can either turn the entire file to become non-sparse 3499 * which we only do if the fallocate is for virtually 3500 * the whole file, or we can overwrite the region with zeroes 3501 * using SMB2_write, which could be prohibitevly expensive 3502 * if len is large. 3503 */ 3504 /* 3505 * We are only trying to fallocate a small region so 3506 * just write it with zero. 3507 */ 3508 if (len <= 1024 * 1024) { 3509 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3510 off, len); 3511 goto out; 3512 } 3513 3514 /* 3515 * Check if falloc starts within first few pages of file 3516 * and ends within a few pages of the end of file to 3517 * ensure that most of file is being forced to be 3518 * fallocated now. If so then setting whole file sparse 3519 * ie potentially making a few extra pages at the beginning 3520 * or end of the file non-sparse via set_sparse is harmless. 3521 */ 3522 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3523 rc = -EOPNOTSUPP; 3524 goto out; 3525 } 3526 } 3527 3528 smb2_set_sparse(xid, tcon, cfile, inode, false); 3529 rc = 0; 3530 3531 out: 3532 if (rc) 3533 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3534 tcon->ses->Suid, off, len, rc); 3535 else 3536 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3537 tcon->ses->Suid, off, len); 3538 3539 free_xid(xid); 3540 return rc; 3541 } 3542 3543 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3544 loff_t off, loff_t len) 3545 { 3546 int rc; 3547 unsigned int xid; 3548 struct inode *inode = file_inode(file); 3549 struct cifsFileInfo *cfile = file->private_data; 3550 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3551 __le64 eof; 3552 loff_t old_eof; 3553 3554 xid = get_xid(); 3555 3556 inode_lock(inode); 3557 3558 old_eof = i_size_read(inode); 3559 if ((off >= old_eof) || 3560 off + len >= old_eof) { 3561 rc = -EINVAL; 3562 goto out; 3563 } 3564 3565 filemap_invalidate_lock(inode->i_mapping); 3566 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3567 if (rc < 0) 3568 goto out_2; 3569 3570 truncate_pagecache_range(inode, off, old_eof); 3571 3572 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3573 old_eof - off - len, off); 3574 if (rc < 0) 3575 goto out_2; 3576 3577 eof = cpu_to_le64(old_eof - len); 3578 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3579 cfile->fid.volatile_fid, cfile->pid, &eof); 3580 if (rc < 0) 3581 goto out_2; 3582 3583 rc = 0; 3584 3585 cifsi->server_eof = i_size_read(inode) - len; 3586 truncate_setsize(inode, cifsi->server_eof); 3587 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3588 out_2: 3589 filemap_invalidate_unlock(inode->i_mapping); 3590 out: 3591 inode_unlock(inode); 3592 free_xid(xid); 3593 return rc; 3594 } 3595 3596 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3597 loff_t off, loff_t len) 3598 { 3599 int rc; 3600 unsigned int xid; 3601 struct cifsFileInfo *cfile = file->private_data; 3602 struct inode *inode = file_inode(file); 3603 __le64 eof; 3604 __u64 count, old_eof; 3605 3606 xid = get_xid(); 3607 3608 inode_lock(inode); 3609 3610 old_eof = i_size_read(inode); 3611 if (off >= old_eof) { 3612 rc = -EINVAL; 3613 goto out; 3614 } 3615 3616 count = old_eof - off; 3617 eof = cpu_to_le64(old_eof + len); 3618 3619 filemap_invalidate_lock(inode->i_mapping); 3620 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1); 3621 if (rc < 0) 3622 goto out_2; 3623 truncate_pagecache_range(inode, off, old_eof); 3624 3625 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3626 cfile->fid.volatile_fid, cfile->pid, &eof); 3627 if (rc < 0) 3628 goto out_2; 3629 3630 truncate_setsize(inode, old_eof + len); 3631 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3632 3633 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3634 if (rc < 0) 3635 goto out_2; 3636 3637 rc = smb3_zero_data(file, tcon, off, len, xid); 3638 if (rc < 0) 3639 goto out_2; 3640 3641 rc = 0; 3642 out_2: 3643 filemap_invalidate_unlock(inode->i_mapping); 3644 out: 3645 inode_unlock(inode); 3646 free_xid(xid); 3647 return rc; 3648 } 3649 3650 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3651 { 3652 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3653 struct cifsInodeInfo *cifsi; 3654 struct inode *inode; 3655 int rc = 0; 3656 struct file_allocated_range_buffer in_data, *out_data = NULL; 3657 u32 out_data_len; 3658 unsigned int xid; 3659 3660 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3661 return generic_file_llseek(file, offset, whence); 3662 3663 inode = d_inode(cfile->dentry); 3664 cifsi = CIFS_I(inode); 3665 3666 if (offset < 0 || offset >= i_size_read(inode)) 3667 return -ENXIO; 3668 3669 xid = get_xid(); 3670 /* 3671 * We need to be sure that all dirty pages are written as they 3672 * might fill holes on the server. 3673 * Note that we also MUST flush any written pages since at least 3674 * some servers (Windows2016) will not reflect recent writes in 3675 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3676 */ 3677 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3678 if (wrcfile) { 3679 filemap_write_and_wait(inode->i_mapping); 3680 smb2_flush_file(xid, tcon, &wrcfile->fid); 3681 cifsFileInfo_put(wrcfile); 3682 } 3683 3684 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3685 if (whence == SEEK_HOLE) 3686 offset = i_size_read(inode); 3687 goto lseek_exit; 3688 } 3689 3690 in_data.file_offset = cpu_to_le64(offset); 3691 in_data.length = cpu_to_le64(i_size_read(inode)); 3692 3693 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3694 cfile->fid.volatile_fid, 3695 FSCTL_QUERY_ALLOCATED_RANGES, 3696 (char *)&in_data, sizeof(in_data), 3697 sizeof(struct file_allocated_range_buffer), 3698 (char **)&out_data, &out_data_len); 3699 if (rc == -E2BIG) 3700 rc = 0; 3701 if (rc) 3702 goto lseek_exit; 3703 3704 if (whence == SEEK_HOLE && out_data_len == 0) 3705 goto lseek_exit; 3706 3707 if (whence == SEEK_DATA && out_data_len == 0) { 3708 rc = -ENXIO; 3709 goto lseek_exit; 3710 } 3711 3712 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3713 rc = -EINVAL; 3714 goto lseek_exit; 3715 } 3716 if (whence == SEEK_DATA) { 3717 offset = le64_to_cpu(out_data->file_offset); 3718 goto lseek_exit; 3719 } 3720 if (offset < le64_to_cpu(out_data->file_offset)) 3721 goto lseek_exit; 3722 3723 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3724 3725 lseek_exit: 3726 free_xid(xid); 3727 kfree(out_data); 3728 if (!rc) 3729 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3730 else 3731 return rc; 3732 } 3733 3734 static int smb3_fiemap(struct cifs_tcon *tcon, 3735 struct cifsFileInfo *cfile, 3736 struct fiemap_extent_info *fei, u64 start, u64 len) 3737 { 3738 unsigned int xid; 3739 struct file_allocated_range_buffer in_data, *out_data; 3740 u32 out_data_len; 3741 int i, num, rc, flags, last_blob; 3742 u64 next; 3743 3744 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3745 if (rc) 3746 return rc; 3747 3748 xid = get_xid(); 3749 again: 3750 in_data.file_offset = cpu_to_le64(start); 3751 in_data.length = cpu_to_le64(len); 3752 3753 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3754 cfile->fid.volatile_fid, 3755 FSCTL_QUERY_ALLOCATED_RANGES, 3756 (char *)&in_data, sizeof(in_data), 3757 1024 * sizeof(struct file_allocated_range_buffer), 3758 (char **)&out_data, &out_data_len); 3759 if (rc == -E2BIG) { 3760 last_blob = 0; 3761 rc = 0; 3762 } else 3763 last_blob = 1; 3764 if (rc) 3765 goto out; 3766 3767 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3768 rc = -EINVAL; 3769 goto out; 3770 } 3771 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3772 rc = -EINVAL; 3773 goto out; 3774 } 3775 3776 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3777 for (i = 0; i < num; i++) { 3778 flags = 0; 3779 if (i == num - 1 && last_blob) 3780 flags |= FIEMAP_EXTENT_LAST; 3781 3782 rc = fiemap_fill_next_extent(fei, 3783 le64_to_cpu(out_data[i].file_offset), 3784 le64_to_cpu(out_data[i].file_offset), 3785 le64_to_cpu(out_data[i].length), 3786 flags); 3787 if (rc < 0) 3788 goto out; 3789 if (rc == 1) { 3790 rc = 0; 3791 goto out; 3792 } 3793 } 3794 3795 if (!last_blob) { 3796 next = le64_to_cpu(out_data[num - 1].file_offset) + 3797 le64_to_cpu(out_data[num - 1].length); 3798 len = len - (next - start); 3799 start = next; 3800 goto again; 3801 } 3802 3803 out: 3804 free_xid(xid); 3805 kfree(out_data); 3806 return rc; 3807 } 3808 3809 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3810 loff_t off, loff_t len) 3811 { 3812 /* KEEP_SIZE already checked for by do_fallocate */ 3813 if (mode & FALLOC_FL_PUNCH_HOLE) 3814 return smb3_punch_hole(file, tcon, off, len); 3815 else if (mode & FALLOC_FL_ZERO_RANGE) { 3816 if (mode & FALLOC_FL_KEEP_SIZE) 3817 return smb3_zero_range(file, tcon, off, len, true); 3818 return smb3_zero_range(file, tcon, off, len, false); 3819 } else if (mode == FALLOC_FL_KEEP_SIZE) 3820 return smb3_simple_falloc(file, tcon, off, len, true); 3821 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3822 return smb3_collapse_range(file, tcon, off, len); 3823 else if (mode == FALLOC_FL_INSERT_RANGE) 3824 return smb3_insert_range(file, tcon, off, len); 3825 else if (mode == 0) 3826 return smb3_simple_falloc(file, tcon, off, len, false); 3827 3828 return -EOPNOTSUPP; 3829 } 3830 3831 static void 3832 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3833 struct cifsInodeInfo *cinode, __u32 oplock, 3834 unsigned int epoch, bool *purge_cache) 3835 { 3836 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3837 } 3838 3839 static void 3840 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3841 unsigned int epoch, bool *purge_cache); 3842 3843 static void 3844 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3845 struct cifsInodeInfo *cinode, __u32 oplock, 3846 unsigned int epoch, bool *purge_cache) 3847 { 3848 unsigned int old_state = cinode->oplock; 3849 unsigned int old_epoch = cinode->epoch; 3850 unsigned int new_state; 3851 3852 if (epoch > old_epoch) { 3853 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3854 cinode->epoch = epoch; 3855 } 3856 3857 new_state = cinode->oplock; 3858 *purge_cache = false; 3859 3860 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3861 (new_state & CIFS_CACHE_READ_FLG) == 0) 3862 *purge_cache = true; 3863 else if (old_state == new_state && (epoch - old_epoch > 1)) 3864 *purge_cache = true; 3865 } 3866 3867 static void 3868 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3869 unsigned int epoch, bool *purge_cache) 3870 { 3871 oplock &= 0xFF; 3872 cinode->lease_granted = false; 3873 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3874 return; 3875 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3876 cinode->oplock = CIFS_CACHE_RHW_FLG; 3877 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3878 &cinode->netfs.inode); 3879 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3880 cinode->oplock = CIFS_CACHE_RW_FLG; 3881 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3882 &cinode->netfs.inode); 3883 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3884 cinode->oplock = CIFS_CACHE_READ_FLG; 3885 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3886 &cinode->netfs.inode); 3887 } else 3888 cinode->oplock = 0; 3889 } 3890 3891 static void 3892 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3893 unsigned int epoch, bool *purge_cache) 3894 { 3895 char message[5] = {0}; 3896 unsigned int new_oplock = 0; 3897 3898 oplock &= 0xFF; 3899 cinode->lease_granted = true; 3900 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3901 return; 3902 3903 /* Check if the server granted an oplock rather than a lease */ 3904 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3905 return smb2_set_oplock_level(cinode, oplock, epoch, 3906 purge_cache); 3907 3908 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3909 new_oplock |= CIFS_CACHE_READ_FLG; 3910 strcat(message, "R"); 3911 } 3912 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3913 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3914 strcat(message, "H"); 3915 } 3916 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3917 new_oplock |= CIFS_CACHE_WRITE_FLG; 3918 strcat(message, "W"); 3919 } 3920 if (!new_oplock) 3921 strncpy(message, "None", sizeof(message)); 3922 3923 cinode->oplock = new_oplock; 3924 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3925 &cinode->netfs.inode); 3926 } 3927 3928 static void 3929 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3930 unsigned int epoch, bool *purge_cache) 3931 { 3932 unsigned int old_oplock = cinode->oplock; 3933 3934 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3935 3936 if (purge_cache) { 3937 *purge_cache = false; 3938 if (old_oplock == CIFS_CACHE_READ_FLG) { 3939 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3940 (epoch - cinode->epoch > 0)) 3941 *purge_cache = true; 3942 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3943 (epoch - cinode->epoch > 1)) 3944 *purge_cache = true; 3945 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3946 (epoch - cinode->epoch > 1)) 3947 *purge_cache = true; 3948 else if (cinode->oplock == 0 && 3949 (epoch - cinode->epoch > 0)) 3950 *purge_cache = true; 3951 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3952 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3953 (epoch - cinode->epoch > 0)) 3954 *purge_cache = true; 3955 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3956 (epoch - cinode->epoch > 1)) 3957 *purge_cache = true; 3958 } 3959 cinode->epoch = epoch; 3960 } 3961 } 3962 3963 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3964 static bool 3965 smb2_is_read_op(__u32 oplock) 3966 { 3967 return oplock == SMB2_OPLOCK_LEVEL_II; 3968 } 3969 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 3970 3971 static bool 3972 smb21_is_read_op(__u32 oplock) 3973 { 3974 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 3975 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 3976 } 3977 3978 static __le32 3979 map_oplock_to_lease(u8 oplock) 3980 { 3981 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3982 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 3983 else if (oplock == SMB2_OPLOCK_LEVEL_II) 3984 return SMB2_LEASE_READ_CACHING_LE; 3985 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 3986 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 3987 SMB2_LEASE_WRITE_CACHING_LE; 3988 return 0; 3989 } 3990 3991 static char * 3992 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 3993 { 3994 struct create_lease *buf; 3995 3996 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 3997 if (!buf) 3998 return NULL; 3999 4000 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4001 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4002 4003 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4004 (struct create_lease, lcontext)); 4005 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4006 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4007 (struct create_lease, Name)); 4008 buf->ccontext.NameLength = cpu_to_le16(4); 4009 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4010 buf->Name[0] = 'R'; 4011 buf->Name[1] = 'q'; 4012 buf->Name[2] = 'L'; 4013 buf->Name[3] = 's'; 4014 return (char *)buf; 4015 } 4016 4017 static char * 4018 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4019 { 4020 struct create_lease_v2 *buf; 4021 4022 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4023 if (!buf) 4024 return NULL; 4025 4026 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4027 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4028 4029 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4030 (struct create_lease_v2, lcontext)); 4031 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4032 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4033 (struct create_lease_v2, Name)); 4034 buf->ccontext.NameLength = cpu_to_le16(4); 4035 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4036 buf->Name[0] = 'R'; 4037 buf->Name[1] = 'q'; 4038 buf->Name[2] = 'L'; 4039 buf->Name[3] = 's'; 4040 return (char *)buf; 4041 } 4042 4043 static __u8 4044 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4045 { 4046 struct create_lease *lc = (struct create_lease *)buf; 4047 4048 *epoch = 0; /* not used */ 4049 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4050 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4051 return le32_to_cpu(lc->lcontext.LeaseState); 4052 } 4053 4054 static __u8 4055 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4056 { 4057 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4058 4059 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4060 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4061 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4062 if (lease_key) 4063 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4064 return le32_to_cpu(lc->lcontext.LeaseState); 4065 } 4066 4067 static unsigned int 4068 smb2_wp_retry_size(struct inode *inode) 4069 { 4070 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4071 SMB2_MAX_BUFFER_SIZE); 4072 } 4073 4074 static bool 4075 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4076 { 4077 return !cfile->invalidHandle; 4078 } 4079 4080 static void 4081 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4082 struct smb_rqst *old_rq, __le16 cipher_type) 4083 { 4084 struct smb2_hdr *shdr = 4085 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4086 4087 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4088 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4089 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4090 tr_hdr->Flags = cpu_to_le16(0x01); 4091 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4092 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4093 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4094 else 4095 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4096 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4097 } 4098 4099 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4100 int num_rqst, const u8 *sig, u8 **iv, 4101 struct aead_request **req, struct sg_table *sgt, 4102 unsigned int *num_sgs, size_t *sensitive_size) 4103 { 4104 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4105 unsigned int iv_size = crypto_aead_ivsize(tfm); 4106 unsigned int len; 4107 u8 *p; 4108 4109 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4110 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4111 return ERR_PTR(*num_sgs); 4112 4113 len = iv_size; 4114 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4115 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4116 len += req_size; 4117 len = ALIGN(len, __alignof__(struct scatterlist)); 4118 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4119 *sensitive_size = len; 4120 4121 p = kvzalloc(len, GFP_NOFS); 4122 if (!p) 4123 return ERR_PTR(-ENOMEM); 4124 4125 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4126 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4127 crypto_tfm_ctx_alignment()); 4128 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4129 __alignof__(struct scatterlist)); 4130 return p; 4131 } 4132 4133 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4134 int num_rqst, const u8 *sig, u8 **iv, 4135 struct aead_request **req, struct scatterlist **sgl, 4136 size_t *sensitive_size) 4137 { 4138 struct sg_table sgtable = {}; 4139 unsigned int skip, num_sgs, i, j; 4140 ssize_t rc; 4141 void *p; 4142 4143 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4144 &num_sgs, sensitive_size); 4145 if (IS_ERR(p)) 4146 return ERR_CAST(p); 4147 4148 sg_init_marker(sgtable.sgl, num_sgs); 4149 4150 /* 4151 * The first rqst has a transform header where the 4152 * first 20 bytes are not part of the encrypted blob. 4153 */ 4154 skip = 20; 4155 4156 for (i = 0; i < num_rqst; i++) { 4157 struct iov_iter *iter = &rqst[i].rq_iter; 4158 size_t count = iov_iter_count(iter); 4159 4160 for (j = 0; j < rqst[i].rq_nvec; j++) { 4161 cifs_sg_set_buf(&sgtable, 4162 rqst[i].rq_iov[j].iov_base + skip, 4163 rqst[i].rq_iov[j].iov_len - skip); 4164 4165 /* See the above comment on the 'skip' assignment */ 4166 skip = 0; 4167 } 4168 sgtable.orig_nents = sgtable.nents; 4169 4170 rc = extract_iter_to_sg(iter, count, &sgtable, 4171 num_sgs - sgtable.nents, 0); 4172 iov_iter_revert(iter, rc); 4173 sgtable.orig_nents = sgtable.nents; 4174 } 4175 4176 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4177 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4178 *sgl = sgtable.sgl; 4179 return p; 4180 } 4181 4182 static int 4183 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4184 { 4185 struct TCP_Server_Info *pserver; 4186 struct cifs_ses *ses; 4187 u8 *ses_enc_key; 4188 4189 /* If server is a channel, select the primary channel */ 4190 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4191 4192 spin_lock(&cifs_tcp_ses_lock); 4193 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4194 if (ses->Suid == ses_id) { 4195 spin_lock(&ses->ses_lock); 4196 ses_enc_key = enc ? ses->smb3encryptionkey : 4197 ses->smb3decryptionkey; 4198 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4199 spin_unlock(&ses->ses_lock); 4200 spin_unlock(&cifs_tcp_ses_lock); 4201 return 0; 4202 } 4203 } 4204 spin_unlock(&cifs_tcp_ses_lock); 4205 4206 trace_smb3_ses_not_found(ses_id); 4207 4208 return -EAGAIN; 4209 } 4210 /* 4211 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4212 * iov[0] - transform header (associate data), 4213 * iov[1-N] - SMB2 header and pages - data to encrypt. 4214 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4215 * untouched. 4216 */ 4217 static int 4218 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4219 struct smb_rqst *rqst, int enc) 4220 { 4221 struct smb2_transform_hdr *tr_hdr = 4222 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4223 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4224 int rc = 0; 4225 struct scatterlist *sg; 4226 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4227 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4228 struct aead_request *req; 4229 u8 *iv; 4230 DECLARE_CRYPTO_WAIT(wait); 4231 struct crypto_aead *tfm; 4232 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4233 void *creq; 4234 size_t sensitive_size; 4235 4236 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4237 if (rc) { 4238 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4239 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4240 return rc; 4241 } 4242 4243 rc = smb3_crypto_aead_allocate(server); 4244 if (rc) { 4245 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4246 return rc; 4247 } 4248 4249 tfm = enc ? server->secmech.enc : server->secmech.dec; 4250 4251 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4252 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4253 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4254 else 4255 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4256 4257 if (rc) { 4258 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4259 return rc; 4260 } 4261 4262 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4263 if (rc) { 4264 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4265 return rc; 4266 } 4267 4268 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4269 &sensitive_size); 4270 if (IS_ERR(creq)) 4271 return PTR_ERR(creq); 4272 4273 if (!enc) { 4274 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4275 crypt_len += SMB2_SIGNATURE_SIZE; 4276 } 4277 4278 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4279 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4280 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4281 else { 4282 iv[0] = 3; 4283 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4284 } 4285 4286 aead_request_set_tfm(req, tfm); 4287 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4288 aead_request_set_ad(req, assoc_data_len); 4289 4290 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4291 crypto_req_done, &wait); 4292 4293 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4294 : crypto_aead_decrypt(req), &wait); 4295 4296 if (!rc && enc) 4297 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4298 4299 kvfree_sensitive(creq, sensitive_size); 4300 return rc; 4301 } 4302 4303 /* 4304 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4305 */ 4306 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4307 { 4308 struct folio *folio; 4309 4310 XA_STATE(xas, buffer, 0); 4311 4312 rcu_read_lock(); 4313 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4314 folio_put(folio); 4315 } 4316 rcu_read_unlock(); 4317 xa_destroy(buffer); 4318 } 4319 4320 void 4321 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4322 { 4323 int i; 4324 4325 for (i = 0; i < num_rqst; i++) 4326 if (!xa_empty(&rqst[i].rq_buffer)) 4327 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4328 } 4329 4330 /* 4331 * This function will initialize new_rq and encrypt the content. 4332 * The first entry, new_rq[0], only contains a single iov which contains 4333 * a smb2_transform_hdr and is pre-allocated by the caller. 4334 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4335 * 4336 * The end result is an array of smb_rqst structures where the first structure 4337 * only contains a single iov for the transform header which we then can pass 4338 * to crypt_message(). 4339 * 4340 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4341 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4342 */ 4343 static int 4344 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4345 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4346 { 4347 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4348 struct page *page; 4349 unsigned int orig_len = 0; 4350 int i, j; 4351 int rc = -ENOMEM; 4352 4353 for (i = 1; i < num_rqst; i++) { 4354 struct smb_rqst *old = &old_rq[i - 1]; 4355 struct smb_rqst *new = &new_rq[i]; 4356 struct xarray *buffer = &new->rq_buffer; 4357 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4358 4359 orig_len += smb_rqst_len(server, old); 4360 new->rq_iov = old->rq_iov; 4361 new->rq_nvec = old->rq_nvec; 4362 4363 xa_init(buffer); 4364 4365 if (size > 0) { 4366 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4367 4368 for (j = 0; j < npages; j++) { 4369 void *o; 4370 4371 rc = -ENOMEM; 4372 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4373 if (!page) 4374 goto err_free; 4375 page->index = j; 4376 o = xa_store(buffer, j, page, GFP_KERNEL); 4377 if (xa_is_err(o)) { 4378 rc = xa_err(o); 4379 put_page(page); 4380 goto err_free; 4381 } 4382 4383 xa_set_mark(buffer, j, XA_MARK_0); 4384 4385 seg = min_t(size_t, size - copied, PAGE_SIZE); 4386 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4387 rc = -EFAULT; 4388 goto err_free; 4389 } 4390 copied += seg; 4391 } 4392 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4393 buffer, 0, size); 4394 new->rq_iter_size = size; 4395 } 4396 } 4397 4398 /* fill the 1st iov with a transform header */ 4399 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4400 4401 rc = crypt_message(server, num_rqst, new_rq, 1); 4402 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4403 if (rc) 4404 goto err_free; 4405 4406 return rc; 4407 4408 err_free: 4409 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4410 return rc; 4411 } 4412 4413 static int 4414 smb3_is_transform_hdr(void *buf) 4415 { 4416 struct smb2_transform_hdr *trhdr = buf; 4417 4418 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4419 } 4420 4421 static int 4422 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4423 unsigned int buf_data_size, struct iov_iter *iter, 4424 bool is_offloaded) 4425 { 4426 struct kvec iov[2]; 4427 struct smb_rqst rqst = {NULL}; 4428 size_t iter_size = 0; 4429 int rc; 4430 4431 iov[0].iov_base = buf; 4432 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4433 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4434 iov[1].iov_len = buf_data_size; 4435 4436 rqst.rq_iov = iov; 4437 rqst.rq_nvec = 2; 4438 if (iter) { 4439 rqst.rq_iter = *iter; 4440 rqst.rq_iter_size = iov_iter_count(iter); 4441 iter_size = iov_iter_count(iter); 4442 } 4443 4444 rc = crypt_message(server, 1, &rqst, 0); 4445 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4446 4447 if (rc) 4448 return rc; 4449 4450 memmove(buf, iov[1].iov_base, buf_data_size); 4451 4452 if (!is_offloaded) 4453 server->total_read = buf_data_size + iter_size; 4454 4455 return rc; 4456 } 4457 4458 static int 4459 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4460 unsigned int skip, struct iov_iter *iter) 4461 { 4462 struct page *page; 4463 unsigned long index; 4464 4465 xa_for_each(pages, index, page) { 4466 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4467 4468 n = copy_page_to_iter(page, skip, len, iter); 4469 if (n != len) { 4470 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4471 return -EIO; 4472 } 4473 data_size -= n; 4474 skip = 0; 4475 } 4476 4477 return 0; 4478 } 4479 4480 static int 4481 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4482 char *buf, unsigned int buf_len, struct xarray *pages, 4483 unsigned int pages_len, bool is_offloaded) 4484 { 4485 unsigned int data_offset; 4486 unsigned int data_len; 4487 unsigned int cur_off; 4488 unsigned int cur_page_idx; 4489 unsigned int pad_len; 4490 struct cifs_readdata *rdata = mid->callback_data; 4491 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4492 int length; 4493 bool use_rdma_mr = false; 4494 4495 if (shdr->Command != SMB2_READ) { 4496 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4497 return -EOPNOTSUPP; 4498 } 4499 4500 if (server->ops->is_session_expired && 4501 server->ops->is_session_expired(buf)) { 4502 if (!is_offloaded) 4503 cifs_reconnect(server, true); 4504 return -1; 4505 } 4506 4507 if (server->ops->is_status_pending && 4508 server->ops->is_status_pending(buf, server)) 4509 return -1; 4510 4511 /* set up first two iov to get credits */ 4512 rdata->iov[0].iov_base = buf; 4513 rdata->iov[0].iov_len = 0; 4514 rdata->iov[1].iov_base = buf; 4515 rdata->iov[1].iov_len = 4516 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4517 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4518 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4519 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4520 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4521 4522 rdata->result = server->ops->map_error(buf, true); 4523 if (rdata->result != 0) { 4524 cifs_dbg(FYI, "%s: server returned error %d\n", 4525 __func__, rdata->result); 4526 /* normal error on read response */ 4527 if (is_offloaded) 4528 mid->mid_state = MID_RESPONSE_RECEIVED; 4529 else 4530 dequeue_mid(mid, false); 4531 return 0; 4532 } 4533 4534 data_offset = server->ops->read_data_offset(buf); 4535 #ifdef CONFIG_CIFS_SMB_DIRECT 4536 use_rdma_mr = rdata->mr; 4537 #endif 4538 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4539 4540 if (data_offset < server->vals->read_rsp_size) { 4541 /* 4542 * win2k8 sometimes sends an offset of 0 when the read 4543 * is beyond the EOF. Treat it as if the data starts just after 4544 * the header. 4545 */ 4546 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4547 __func__, data_offset); 4548 data_offset = server->vals->read_rsp_size; 4549 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4550 /* data_offset is beyond the end of smallbuf */ 4551 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4552 __func__, data_offset); 4553 rdata->result = -EIO; 4554 if (is_offloaded) 4555 mid->mid_state = MID_RESPONSE_MALFORMED; 4556 else 4557 dequeue_mid(mid, rdata->result); 4558 return 0; 4559 } 4560 4561 pad_len = data_offset - server->vals->read_rsp_size; 4562 4563 if (buf_len <= data_offset) { 4564 /* read response payload is in pages */ 4565 cur_page_idx = pad_len / PAGE_SIZE; 4566 cur_off = pad_len % PAGE_SIZE; 4567 4568 if (cur_page_idx != 0) { 4569 /* data offset is beyond the 1st page of response */ 4570 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4571 __func__, data_offset); 4572 rdata->result = -EIO; 4573 if (is_offloaded) 4574 mid->mid_state = MID_RESPONSE_MALFORMED; 4575 else 4576 dequeue_mid(mid, rdata->result); 4577 return 0; 4578 } 4579 4580 if (data_len > pages_len - pad_len) { 4581 /* data_len is corrupt -- discard frame */ 4582 rdata->result = -EIO; 4583 if (is_offloaded) 4584 mid->mid_state = MID_RESPONSE_MALFORMED; 4585 else 4586 dequeue_mid(mid, rdata->result); 4587 return 0; 4588 } 4589 4590 /* Copy the data to the output I/O iterator. */ 4591 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4592 cur_off, &rdata->iter); 4593 if (rdata->result != 0) { 4594 if (is_offloaded) 4595 mid->mid_state = MID_RESPONSE_MALFORMED; 4596 else 4597 dequeue_mid(mid, rdata->result); 4598 return 0; 4599 } 4600 rdata->got_bytes = pages_len; 4601 4602 } else if (buf_len >= data_offset + data_len) { 4603 /* read response payload is in buf */ 4604 WARN_ONCE(pages && !xa_empty(pages), 4605 "read data can be either in buf or in pages"); 4606 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4607 if (length < 0) 4608 return length; 4609 rdata->got_bytes = data_len; 4610 } else { 4611 /* read response payload cannot be in both buf and pages */ 4612 WARN_ONCE(1, "buf can not contain only a part of read data"); 4613 rdata->result = -EIO; 4614 if (is_offloaded) 4615 mid->mid_state = MID_RESPONSE_MALFORMED; 4616 else 4617 dequeue_mid(mid, rdata->result); 4618 return 0; 4619 } 4620 4621 if (is_offloaded) 4622 mid->mid_state = MID_RESPONSE_RECEIVED; 4623 else 4624 dequeue_mid(mid, false); 4625 return 0; 4626 } 4627 4628 struct smb2_decrypt_work { 4629 struct work_struct decrypt; 4630 struct TCP_Server_Info *server; 4631 struct xarray buffer; 4632 char *buf; 4633 unsigned int len; 4634 }; 4635 4636 4637 static void smb2_decrypt_offload(struct work_struct *work) 4638 { 4639 struct smb2_decrypt_work *dw = container_of(work, 4640 struct smb2_decrypt_work, decrypt); 4641 int rc; 4642 struct mid_q_entry *mid; 4643 struct iov_iter iter; 4644 4645 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4646 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4647 &iter, true); 4648 if (rc) { 4649 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4650 goto free_pages; 4651 } 4652 4653 dw->server->lstrp = jiffies; 4654 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4655 if (mid == NULL) 4656 cifs_dbg(FYI, "mid not found\n"); 4657 else { 4658 mid->decrypted = true; 4659 rc = handle_read_data(dw->server, mid, dw->buf, 4660 dw->server->vals->read_rsp_size, 4661 &dw->buffer, dw->len, 4662 true); 4663 if (rc >= 0) { 4664 #ifdef CONFIG_CIFS_STATS2 4665 mid->when_received = jiffies; 4666 #endif 4667 if (dw->server->ops->is_network_name_deleted) 4668 dw->server->ops->is_network_name_deleted(dw->buf, 4669 dw->server); 4670 4671 mid->callback(mid); 4672 } else { 4673 spin_lock(&dw->server->srv_lock); 4674 if (dw->server->tcpStatus == CifsNeedReconnect) { 4675 spin_lock(&dw->server->mid_lock); 4676 mid->mid_state = MID_RETRY_NEEDED; 4677 spin_unlock(&dw->server->mid_lock); 4678 spin_unlock(&dw->server->srv_lock); 4679 mid->callback(mid); 4680 } else { 4681 spin_lock(&dw->server->mid_lock); 4682 mid->mid_state = MID_REQUEST_SUBMITTED; 4683 mid->mid_flags &= ~(MID_DELETED); 4684 list_add_tail(&mid->qhead, 4685 &dw->server->pending_mid_q); 4686 spin_unlock(&dw->server->mid_lock); 4687 spin_unlock(&dw->server->srv_lock); 4688 } 4689 } 4690 release_mid(mid); 4691 } 4692 4693 free_pages: 4694 cifs_clear_xarray_buffer(&dw->buffer); 4695 cifs_small_buf_release(dw->buf); 4696 kfree(dw); 4697 } 4698 4699 4700 static int 4701 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4702 int *num_mids) 4703 { 4704 struct page *page; 4705 char *buf = server->smallbuf; 4706 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4707 struct iov_iter iter; 4708 unsigned int len, npages; 4709 unsigned int buflen = server->pdu_size; 4710 int rc; 4711 int i = 0; 4712 struct smb2_decrypt_work *dw; 4713 4714 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4715 if (!dw) 4716 return -ENOMEM; 4717 xa_init(&dw->buffer); 4718 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4719 dw->server = server; 4720 4721 *num_mids = 1; 4722 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4723 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4724 4725 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4726 if (rc < 0) 4727 goto free_dw; 4728 server->total_read += rc; 4729 4730 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4731 server->vals->read_rsp_size; 4732 dw->len = len; 4733 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4734 4735 rc = -ENOMEM; 4736 for (; i < npages; i++) { 4737 void *old; 4738 4739 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4740 if (!page) 4741 goto discard_data; 4742 page->index = i; 4743 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4744 if (xa_is_err(old)) { 4745 rc = xa_err(old); 4746 put_page(page); 4747 goto discard_data; 4748 } 4749 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4750 } 4751 4752 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4753 4754 /* Read the data into the buffer and clear excess bufferage. */ 4755 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4756 if (rc < 0) 4757 goto discard_data; 4758 4759 server->total_read += rc; 4760 if (rc < npages * PAGE_SIZE) 4761 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4762 iov_iter_revert(&iter, npages * PAGE_SIZE); 4763 iov_iter_truncate(&iter, dw->len); 4764 4765 rc = cifs_discard_remaining_data(server); 4766 if (rc) 4767 goto free_pages; 4768 4769 /* 4770 * For large reads, offload to different thread for better performance, 4771 * use more cores decrypting which can be expensive 4772 */ 4773 4774 if ((server->min_offload) && (server->in_flight > 1) && 4775 (server->pdu_size >= server->min_offload)) { 4776 dw->buf = server->smallbuf; 4777 server->smallbuf = (char *)cifs_small_buf_get(); 4778 4779 queue_work(decrypt_wq, &dw->decrypt); 4780 *num_mids = 0; /* worker thread takes care of finding mid */ 4781 return -1; 4782 } 4783 4784 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4785 &iter, false); 4786 if (rc) 4787 goto free_pages; 4788 4789 *mid = smb2_find_mid(server, buf); 4790 if (*mid == NULL) { 4791 cifs_dbg(FYI, "mid not found\n"); 4792 } else { 4793 cifs_dbg(FYI, "mid found\n"); 4794 (*mid)->decrypted = true; 4795 rc = handle_read_data(server, *mid, buf, 4796 server->vals->read_rsp_size, 4797 &dw->buffer, dw->len, false); 4798 if (rc >= 0) { 4799 if (server->ops->is_network_name_deleted) { 4800 server->ops->is_network_name_deleted(buf, 4801 server); 4802 } 4803 } 4804 } 4805 4806 free_pages: 4807 cifs_clear_xarray_buffer(&dw->buffer); 4808 free_dw: 4809 kfree(dw); 4810 return rc; 4811 discard_data: 4812 cifs_discard_remaining_data(server); 4813 goto free_pages; 4814 } 4815 4816 static int 4817 receive_encrypted_standard(struct TCP_Server_Info *server, 4818 struct mid_q_entry **mids, char **bufs, 4819 int *num_mids) 4820 { 4821 int ret, length; 4822 char *buf = server->smallbuf; 4823 struct smb2_hdr *shdr; 4824 unsigned int pdu_length = server->pdu_size; 4825 unsigned int buf_size; 4826 unsigned int next_cmd; 4827 struct mid_q_entry *mid_entry; 4828 int next_is_large; 4829 char *next_buffer = NULL; 4830 4831 *num_mids = 0; 4832 4833 /* switch to large buffer if too big for a small one */ 4834 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4835 server->large_buf = true; 4836 memcpy(server->bigbuf, buf, server->total_read); 4837 buf = server->bigbuf; 4838 } 4839 4840 /* now read the rest */ 4841 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4842 pdu_length - HEADER_SIZE(server) + 1); 4843 if (length < 0) 4844 return length; 4845 server->total_read += length; 4846 4847 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4848 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4849 if (length) 4850 return length; 4851 4852 next_is_large = server->large_buf; 4853 one_more: 4854 shdr = (struct smb2_hdr *)buf; 4855 next_cmd = le32_to_cpu(shdr->NextCommand); 4856 if (next_cmd) { 4857 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4858 return -1; 4859 if (next_is_large) 4860 next_buffer = (char *)cifs_buf_get(); 4861 else 4862 next_buffer = (char *)cifs_small_buf_get(); 4863 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4864 } 4865 4866 mid_entry = smb2_find_mid(server, buf); 4867 if (mid_entry == NULL) 4868 cifs_dbg(FYI, "mid not found\n"); 4869 else { 4870 cifs_dbg(FYI, "mid found\n"); 4871 mid_entry->decrypted = true; 4872 mid_entry->resp_buf_size = server->pdu_size; 4873 } 4874 4875 if (*num_mids >= MAX_COMPOUND) { 4876 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4877 return -1; 4878 } 4879 bufs[*num_mids] = buf; 4880 mids[(*num_mids)++] = mid_entry; 4881 4882 if (mid_entry && mid_entry->handle) 4883 ret = mid_entry->handle(server, mid_entry); 4884 else 4885 ret = cifs_handle_standard(server, mid_entry); 4886 4887 if (ret == 0 && next_cmd) { 4888 pdu_length -= next_cmd; 4889 server->large_buf = next_is_large; 4890 if (next_is_large) 4891 server->bigbuf = buf = next_buffer; 4892 else 4893 server->smallbuf = buf = next_buffer; 4894 goto one_more; 4895 } else if (ret != 0) { 4896 /* 4897 * ret != 0 here means that we didn't get to handle_mid() thus 4898 * server->smallbuf and server->bigbuf are still valid. We need 4899 * to free next_buffer because it is not going to be used 4900 * anywhere. 4901 */ 4902 if (next_is_large) 4903 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4904 else 4905 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4906 } 4907 4908 return ret; 4909 } 4910 4911 static int 4912 smb3_receive_transform(struct TCP_Server_Info *server, 4913 struct mid_q_entry **mids, char **bufs, int *num_mids) 4914 { 4915 char *buf = server->smallbuf; 4916 unsigned int pdu_length = server->pdu_size; 4917 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4918 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4919 4920 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4921 sizeof(struct smb2_hdr)) { 4922 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4923 pdu_length); 4924 cifs_reconnect(server, true); 4925 return -ECONNABORTED; 4926 } 4927 4928 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4929 cifs_server_dbg(VFS, "Transform message is broken\n"); 4930 cifs_reconnect(server, true); 4931 return -ECONNABORTED; 4932 } 4933 4934 /* TODO: add support for compounds containing READ. */ 4935 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4936 return receive_encrypted_read(server, &mids[0], num_mids); 4937 } 4938 4939 return receive_encrypted_standard(server, mids, bufs, num_mids); 4940 } 4941 4942 int 4943 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4944 { 4945 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4946 4947 return handle_read_data(server, mid, buf, server->pdu_size, 4948 NULL, 0, false); 4949 } 4950 4951 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4952 unsigned int *noff) 4953 { 4954 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4955 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 4956 4957 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 4958 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 4959 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 4960 return -EINVAL; 4961 } else { 4962 *noff = le32_to_cpu(hdr->NextCommand); 4963 } 4964 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 4965 return -EINVAL; 4966 return 0; 4967 } 4968 4969 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 4970 struct dentry *dentry, struct cifs_tcon *tcon, 4971 const char *full_path, umode_t mode, dev_t dev) 4972 { 4973 struct cifs_open_info_data buf = {}; 4974 struct TCP_Server_Info *server = tcon->ses->server; 4975 struct cifs_open_parms oparms; 4976 struct cifs_io_parms io_parms = {}; 4977 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 4978 struct cifs_fid fid; 4979 unsigned int bytes_written; 4980 struct win_dev *pdev; 4981 struct kvec iov[2]; 4982 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 4983 int rc; 4984 4985 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 4986 return -EPERM; 4987 4988 oparms = (struct cifs_open_parms) { 4989 .tcon = tcon, 4990 .cifs_sb = cifs_sb, 4991 .desired_access = GENERIC_WRITE, 4992 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 4993 CREATE_OPTION_SPECIAL), 4994 .disposition = FILE_CREATE, 4995 .path = full_path, 4996 .fid = &fid, 4997 }; 4998 4999 rc = server->ops->open(xid, &oparms, &oplock, &buf); 5000 if (rc) 5001 return rc; 5002 5003 /* 5004 * BB Do not bother to decode buf since no local inode yet to put 5005 * timestamps in, but we can reuse it safely. 5006 */ 5007 pdev = (struct win_dev *)&buf.fi; 5008 io_parms.pid = current->tgid; 5009 io_parms.tcon = tcon; 5010 io_parms.length = sizeof(*pdev); 5011 iov[1].iov_base = pdev; 5012 iov[1].iov_len = sizeof(*pdev); 5013 if (S_ISCHR(mode)) { 5014 memcpy(pdev->type, "IntxCHR", 8); 5015 pdev->major = cpu_to_le64(MAJOR(dev)); 5016 pdev->minor = cpu_to_le64(MINOR(dev)); 5017 } else if (S_ISBLK(mode)) { 5018 memcpy(pdev->type, "IntxBLK", 8); 5019 pdev->major = cpu_to_le64(MAJOR(dev)); 5020 pdev->minor = cpu_to_le64(MINOR(dev)); 5021 } else if (S_ISFIFO(mode)) { 5022 memcpy(pdev->type, "LnxFIFO", 8); 5023 } 5024 5025 rc = server->ops->sync_write(xid, &fid, &io_parms, 5026 &bytes_written, iov, 1); 5027 server->ops->close(xid, tcon, &fid); 5028 d_drop(dentry); 5029 /* FIXME: add code here to set EAs */ 5030 cifs_free_open_info(&buf); 5031 return rc; 5032 } 5033 5034 static inline u64 mode_nfs_type(mode_t mode) 5035 { 5036 switch (mode & S_IFMT) { 5037 case S_IFBLK: return NFS_SPECFILE_BLK; 5038 case S_IFCHR: return NFS_SPECFILE_CHR; 5039 case S_IFIFO: return NFS_SPECFILE_FIFO; 5040 case S_IFSOCK: return NFS_SPECFILE_SOCK; 5041 } 5042 return 0; 5043 } 5044 5045 static int nfs_set_reparse_buf(struct reparse_posix_data *buf, 5046 mode_t mode, dev_t dev, 5047 struct kvec *iov) 5048 { 5049 u64 type; 5050 u16 len, dlen; 5051 5052 len = sizeof(*buf); 5053 5054 switch ((type = mode_nfs_type(mode))) { 5055 case NFS_SPECFILE_BLK: 5056 case NFS_SPECFILE_CHR: 5057 dlen = sizeof(__le64); 5058 break; 5059 case NFS_SPECFILE_FIFO: 5060 case NFS_SPECFILE_SOCK: 5061 dlen = 0; 5062 break; 5063 default: 5064 return -EOPNOTSUPP; 5065 } 5066 5067 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS); 5068 buf->Reserved = 0; 5069 buf->InodeType = cpu_to_le64(type); 5070 buf->ReparseDataLength = cpu_to_le16(len + dlen - 5071 sizeof(struct reparse_data_buffer)); 5072 *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) | 5073 MINOR(dev)); 5074 iov->iov_base = buf; 5075 iov->iov_len = len + dlen; 5076 return 0; 5077 } 5078 5079 static int nfs_make_node(unsigned int xid, struct inode *inode, 5080 struct dentry *dentry, struct cifs_tcon *tcon, 5081 const char *full_path, umode_t mode, dev_t dev) 5082 { 5083 struct cifs_open_info_data data; 5084 struct reparse_posix_data *p; 5085 struct inode *new; 5086 struct kvec iov; 5087 __u8 buf[sizeof(*p) + sizeof(__le64)]; 5088 int rc; 5089 5090 p = (struct reparse_posix_data *)buf; 5091 rc = nfs_set_reparse_buf(p, mode, dev, &iov); 5092 if (rc) 5093 return rc; 5094 5095 data = (struct cifs_open_info_data) { 5096 .reparse_point = true, 5097 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, }, 5098 }; 5099 5100 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5101 tcon, full_path, &iov); 5102 if (!IS_ERR(new)) 5103 d_instantiate(dentry, new); 5104 else 5105 rc = PTR_ERR(new); 5106 cifs_free_open_info(&data); 5107 return rc; 5108 } 5109 5110 static int smb2_create_reparse_symlink(const unsigned int xid, 5111 struct inode *inode, 5112 struct dentry *dentry, 5113 struct cifs_tcon *tcon, 5114 const char *full_path, 5115 const char *symname) 5116 { 5117 struct reparse_symlink_data_buffer *buf = NULL; 5118 struct cifs_open_info_data data; 5119 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5120 struct inode *new; 5121 struct kvec iov; 5122 __le16 *path; 5123 char *sym; 5124 u16 len, plen; 5125 int rc = 0; 5126 5127 sym = kstrdup(symname, GFP_KERNEL); 5128 if (!sym) 5129 return -ENOMEM; 5130 5131 data = (struct cifs_open_info_data) { 5132 .reparse_point = true, 5133 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, }, 5134 .symlink_target = sym, 5135 }; 5136 5137 path = cifs_convert_path_to_utf16(symname, cifs_sb); 5138 if (!path) { 5139 rc = -ENOMEM; 5140 goto out; 5141 } 5142 5143 plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX); 5144 len = sizeof(*buf) + plen * 2; 5145 buf = kzalloc(len, GFP_KERNEL); 5146 if (!buf) { 5147 rc = -ENOMEM; 5148 goto out; 5149 } 5150 5151 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK); 5152 buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer)); 5153 buf->SubstituteNameOffset = cpu_to_le16(plen); 5154 buf->SubstituteNameLength = cpu_to_le16(plen); 5155 memcpy(&buf->PathBuffer[plen], path, plen); 5156 buf->PrintNameOffset = 0; 5157 buf->PrintNameLength = cpu_to_le16(plen); 5158 memcpy(buf->PathBuffer, path, plen); 5159 buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0); 5160 5161 iov.iov_base = buf; 5162 iov.iov_len = len; 5163 new = smb2_get_reparse_inode(&data, inode->i_sb, xid, 5164 tcon, full_path, &iov); 5165 if (!IS_ERR(new)) 5166 d_instantiate(dentry, new); 5167 else 5168 rc = PTR_ERR(new); 5169 out: 5170 kfree(path); 5171 cifs_free_open_info(&data); 5172 kfree(buf); 5173 return rc; 5174 } 5175 5176 static int smb2_make_node(unsigned int xid, struct inode *inode, 5177 struct dentry *dentry, struct cifs_tcon *tcon, 5178 const char *full_path, umode_t mode, dev_t dev) 5179 { 5180 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5181 int rc; 5182 5183 /* 5184 * Check if mounted with mount parm 'sfu' mount parm. 5185 * SFU emulation should work with all servers, but only 5186 * supports block and char device (no socket & fifo), 5187 * and was used by default in earlier versions of Windows 5188 */ 5189 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5190 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5191 full_path, mode, dev); 5192 } else { 5193 rc = nfs_make_node(xid, inode, dentry, tcon, 5194 full_path, mode, dev); 5195 } 5196 return rc; 5197 } 5198 5199 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5200 struct smb_version_operations smb20_operations = { 5201 .compare_fids = smb2_compare_fids, 5202 .setup_request = smb2_setup_request, 5203 .setup_async_request = smb2_setup_async_request, 5204 .check_receive = smb2_check_receive, 5205 .add_credits = smb2_add_credits, 5206 .set_credits = smb2_set_credits, 5207 .get_credits_field = smb2_get_credits_field, 5208 .get_credits = smb2_get_credits, 5209 .wait_mtu_credits = cifs_wait_mtu_credits, 5210 .get_next_mid = smb2_get_next_mid, 5211 .revert_current_mid = smb2_revert_current_mid, 5212 .read_data_offset = smb2_read_data_offset, 5213 .read_data_length = smb2_read_data_length, 5214 .map_error = map_smb2_to_linux_error, 5215 .find_mid = smb2_find_mid, 5216 .check_message = smb2_check_message, 5217 .dump_detail = smb2_dump_detail, 5218 .clear_stats = smb2_clear_stats, 5219 .print_stats = smb2_print_stats, 5220 .is_oplock_break = smb2_is_valid_oplock_break, 5221 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5222 .downgrade_oplock = smb2_downgrade_oplock, 5223 .need_neg = smb2_need_neg, 5224 .negotiate = smb2_negotiate, 5225 .negotiate_wsize = smb2_negotiate_wsize, 5226 .negotiate_rsize = smb2_negotiate_rsize, 5227 .sess_setup = SMB2_sess_setup, 5228 .logoff = SMB2_logoff, 5229 .tree_connect = SMB2_tcon, 5230 .tree_disconnect = SMB2_tdis, 5231 .qfs_tcon = smb2_qfs_tcon, 5232 .is_path_accessible = smb2_is_path_accessible, 5233 .can_echo = smb2_can_echo, 5234 .echo = SMB2_echo, 5235 .query_path_info = smb2_query_path_info, 5236 .query_reparse_point = smb2_query_reparse_point, 5237 .get_srv_inum = smb2_get_srv_inum, 5238 .query_file_info = smb2_query_file_info, 5239 .set_path_size = smb2_set_path_size, 5240 .set_file_size = smb2_set_file_size, 5241 .set_file_info = smb2_set_file_info, 5242 .set_compression = smb2_set_compression, 5243 .mkdir = smb2_mkdir, 5244 .mkdir_setinfo = smb2_mkdir_setinfo, 5245 .rmdir = smb2_rmdir, 5246 .unlink = smb2_unlink, 5247 .rename = smb2_rename_path, 5248 .create_hardlink = smb2_create_hardlink, 5249 .parse_reparse_point = smb2_parse_reparse_point, 5250 .query_mf_symlink = smb3_query_mf_symlink, 5251 .create_mf_symlink = smb3_create_mf_symlink, 5252 .create_reparse_symlink = smb2_create_reparse_symlink, 5253 .open = smb2_open_file, 5254 .set_fid = smb2_set_fid, 5255 .close = smb2_close_file, 5256 .flush = smb2_flush_file, 5257 .async_readv = smb2_async_readv, 5258 .async_writev = smb2_async_writev, 5259 .sync_read = smb2_sync_read, 5260 .sync_write = smb2_sync_write, 5261 .query_dir_first = smb2_query_dir_first, 5262 .query_dir_next = smb2_query_dir_next, 5263 .close_dir = smb2_close_dir, 5264 .calc_smb_size = smb2_calc_size, 5265 .is_status_pending = smb2_is_status_pending, 5266 .is_session_expired = smb2_is_session_expired, 5267 .oplock_response = smb2_oplock_response, 5268 .queryfs = smb2_queryfs, 5269 .mand_lock = smb2_mand_lock, 5270 .mand_unlock_range = smb2_unlock_range, 5271 .push_mand_locks = smb2_push_mandatory_locks, 5272 .get_lease_key = smb2_get_lease_key, 5273 .set_lease_key = smb2_set_lease_key, 5274 .new_lease_key = smb2_new_lease_key, 5275 .calc_signature = smb2_calc_signature, 5276 .is_read_op = smb2_is_read_op, 5277 .set_oplock_level = smb2_set_oplock_level, 5278 .create_lease_buf = smb2_create_lease_buf, 5279 .parse_lease_buf = smb2_parse_lease_buf, 5280 .copychunk_range = smb2_copychunk_range, 5281 .wp_retry_size = smb2_wp_retry_size, 5282 .dir_needs_close = smb2_dir_needs_close, 5283 .get_dfs_refer = smb2_get_dfs_refer, 5284 .select_sectype = smb2_select_sectype, 5285 #ifdef CONFIG_CIFS_XATTR 5286 .query_all_EAs = smb2_query_eas, 5287 .set_EA = smb2_set_ea, 5288 #endif /* CIFS_XATTR */ 5289 .get_acl = get_smb2_acl, 5290 .get_acl_by_fid = get_smb2_acl_by_fid, 5291 .set_acl = set_smb2_acl, 5292 .next_header = smb2_next_header, 5293 .ioctl_query_info = smb2_ioctl_query_info, 5294 .make_node = smb2_make_node, 5295 .fiemap = smb3_fiemap, 5296 .llseek = smb3_llseek, 5297 .is_status_io_timeout = smb2_is_status_io_timeout, 5298 .is_network_name_deleted = smb2_is_network_name_deleted, 5299 }; 5300 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5301 5302 struct smb_version_operations smb21_operations = { 5303 .compare_fids = smb2_compare_fids, 5304 .setup_request = smb2_setup_request, 5305 .setup_async_request = smb2_setup_async_request, 5306 .check_receive = smb2_check_receive, 5307 .add_credits = smb2_add_credits, 5308 .set_credits = smb2_set_credits, 5309 .get_credits_field = smb2_get_credits_field, 5310 .get_credits = smb2_get_credits, 5311 .wait_mtu_credits = smb2_wait_mtu_credits, 5312 .adjust_credits = smb2_adjust_credits, 5313 .get_next_mid = smb2_get_next_mid, 5314 .revert_current_mid = smb2_revert_current_mid, 5315 .read_data_offset = smb2_read_data_offset, 5316 .read_data_length = smb2_read_data_length, 5317 .map_error = map_smb2_to_linux_error, 5318 .find_mid = smb2_find_mid, 5319 .check_message = smb2_check_message, 5320 .dump_detail = smb2_dump_detail, 5321 .clear_stats = smb2_clear_stats, 5322 .print_stats = smb2_print_stats, 5323 .is_oplock_break = smb2_is_valid_oplock_break, 5324 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5325 .downgrade_oplock = smb2_downgrade_oplock, 5326 .need_neg = smb2_need_neg, 5327 .negotiate = smb2_negotiate, 5328 .negotiate_wsize = smb2_negotiate_wsize, 5329 .negotiate_rsize = smb2_negotiate_rsize, 5330 .sess_setup = SMB2_sess_setup, 5331 .logoff = SMB2_logoff, 5332 .tree_connect = SMB2_tcon, 5333 .tree_disconnect = SMB2_tdis, 5334 .qfs_tcon = smb2_qfs_tcon, 5335 .is_path_accessible = smb2_is_path_accessible, 5336 .can_echo = smb2_can_echo, 5337 .echo = SMB2_echo, 5338 .query_path_info = smb2_query_path_info, 5339 .query_reparse_point = smb2_query_reparse_point, 5340 .get_srv_inum = smb2_get_srv_inum, 5341 .query_file_info = smb2_query_file_info, 5342 .set_path_size = smb2_set_path_size, 5343 .set_file_size = smb2_set_file_size, 5344 .set_file_info = smb2_set_file_info, 5345 .set_compression = smb2_set_compression, 5346 .mkdir = smb2_mkdir, 5347 .mkdir_setinfo = smb2_mkdir_setinfo, 5348 .rmdir = smb2_rmdir, 5349 .unlink = smb2_unlink, 5350 .rename = smb2_rename_path, 5351 .create_hardlink = smb2_create_hardlink, 5352 .parse_reparse_point = smb2_parse_reparse_point, 5353 .query_mf_symlink = smb3_query_mf_symlink, 5354 .create_mf_symlink = smb3_create_mf_symlink, 5355 .create_reparse_symlink = smb2_create_reparse_symlink, 5356 .open = smb2_open_file, 5357 .set_fid = smb2_set_fid, 5358 .close = smb2_close_file, 5359 .flush = smb2_flush_file, 5360 .async_readv = smb2_async_readv, 5361 .async_writev = smb2_async_writev, 5362 .sync_read = smb2_sync_read, 5363 .sync_write = smb2_sync_write, 5364 .query_dir_first = smb2_query_dir_first, 5365 .query_dir_next = smb2_query_dir_next, 5366 .close_dir = smb2_close_dir, 5367 .calc_smb_size = smb2_calc_size, 5368 .is_status_pending = smb2_is_status_pending, 5369 .is_session_expired = smb2_is_session_expired, 5370 .oplock_response = smb2_oplock_response, 5371 .queryfs = smb2_queryfs, 5372 .mand_lock = smb2_mand_lock, 5373 .mand_unlock_range = smb2_unlock_range, 5374 .push_mand_locks = smb2_push_mandatory_locks, 5375 .get_lease_key = smb2_get_lease_key, 5376 .set_lease_key = smb2_set_lease_key, 5377 .new_lease_key = smb2_new_lease_key, 5378 .calc_signature = smb2_calc_signature, 5379 .is_read_op = smb21_is_read_op, 5380 .set_oplock_level = smb21_set_oplock_level, 5381 .create_lease_buf = smb2_create_lease_buf, 5382 .parse_lease_buf = smb2_parse_lease_buf, 5383 .copychunk_range = smb2_copychunk_range, 5384 .wp_retry_size = smb2_wp_retry_size, 5385 .dir_needs_close = smb2_dir_needs_close, 5386 .enum_snapshots = smb3_enum_snapshots, 5387 .notify = smb3_notify, 5388 .get_dfs_refer = smb2_get_dfs_refer, 5389 .select_sectype = smb2_select_sectype, 5390 #ifdef CONFIG_CIFS_XATTR 5391 .query_all_EAs = smb2_query_eas, 5392 .set_EA = smb2_set_ea, 5393 #endif /* CIFS_XATTR */ 5394 .get_acl = get_smb2_acl, 5395 .get_acl_by_fid = get_smb2_acl_by_fid, 5396 .set_acl = set_smb2_acl, 5397 .next_header = smb2_next_header, 5398 .ioctl_query_info = smb2_ioctl_query_info, 5399 .make_node = smb2_make_node, 5400 .fiemap = smb3_fiemap, 5401 .llseek = smb3_llseek, 5402 .is_status_io_timeout = smb2_is_status_io_timeout, 5403 .is_network_name_deleted = smb2_is_network_name_deleted, 5404 }; 5405 5406 struct smb_version_operations smb30_operations = { 5407 .compare_fids = smb2_compare_fids, 5408 .setup_request = smb2_setup_request, 5409 .setup_async_request = smb2_setup_async_request, 5410 .check_receive = smb2_check_receive, 5411 .add_credits = smb2_add_credits, 5412 .set_credits = smb2_set_credits, 5413 .get_credits_field = smb2_get_credits_field, 5414 .get_credits = smb2_get_credits, 5415 .wait_mtu_credits = smb2_wait_mtu_credits, 5416 .adjust_credits = smb2_adjust_credits, 5417 .get_next_mid = smb2_get_next_mid, 5418 .revert_current_mid = smb2_revert_current_mid, 5419 .read_data_offset = smb2_read_data_offset, 5420 .read_data_length = smb2_read_data_length, 5421 .map_error = map_smb2_to_linux_error, 5422 .find_mid = smb2_find_mid, 5423 .check_message = smb2_check_message, 5424 .dump_detail = smb2_dump_detail, 5425 .clear_stats = smb2_clear_stats, 5426 .print_stats = smb2_print_stats, 5427 .dump_share_caps = smb2_dump_share_caps, 5428 .is_oplock_break = smb2_is_valid_oplock_break, 5429 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5430 .downgrade_oplock = smb3_downgrade_oplock, 5431 .need_neg = smb2_need_neg, 5432 .negotiate = smb2_negotiate, 5433 .negotiate_wsize = smb3_negotiate_wsize, 5434 .negotiate_rsize = smb3_negotiate_rsize, 5435 .sess_setup = SMB2_sess_setup, 5436 .logoff = SMB2_logoff, 5437 .tree_connect = SMB2_tcon, 5438 .tree_disconnect = SMB2_tdis, 5439 .qfs_tcon = smb3_qfs_tcon, 5440 .query_server_interfaces = SMB3_request_interfaces, 5441 .is_path_accessible = smb2_is_path_accessible, 5442 .can_echo = smb2_can_echo, 5443 .echo = SMB2_echo, 5444 .query_path_info = smb2_query_path_info, 5445 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5446 .query_reparse_point = smb2_query_reparse_point, 5447 .get_srv_inum = smb2_get_srv_inum, 5448 .query_file_info = smb2_query_file_info, 5449 .set_path_size = smb2_set_path_size, 5450 .set_file_size = smb2_set_file_size, 5451 .set_file_info = smb2_set_file_info, 5452 .set_compression = smb2_set_compression, 5453 .mkdir = smb2_mkdir, 5454 .mkdir_setinfo = smb2_mkdir_setinfo, 5455 .rmdir = smb2_rmdir, 5456 .unlink = smb2_unlink, 5457 .rename = smb2_rename_path, 5458 .create_hardlink = smb2_create_hardlink, 5459 .parse_reparse_point = smb2_parse_reparse_point, 5460 .query_mf_symlink = smb3_query_mf_symlink, 5461 .create_mf_symlink = smb3_create_mf_symlink, 5462 .create_reparse_symlink = smb2_create_reparse_symlink, 5463 .open = smb2_open_file, 5464 .set_fid = smb2_set_fid, 5465 .close = smb2_close_file, 5466 .close_getattr = smb2_close_getattr, 5467 .flush = smb2_flush_file, 5468 .async_readv = smb2_async_readv, 5469 .async_writev = smb2_async_writev, 5470 .sync_read = smb2_sync_read, 5471 .sync_write = smb2_sync_write, 5472 .query_dir_first = smb2_query_dir_first, 5473 .query_dir_next = smb2_query_dir_next, 5474 .close_dir = smb2_close_dir, 5475 .calc_smb_size = smb2_calc_size, 5476 .is_status_pending = smb2_is_status_pending, 5477 .is_session_expired = smb2_is_session_expired, 5478 .oplock_response = smb2_oplock_response, 5479 .queryfs = smb2_queryfs, 5480 .mand_lock = smb2_mand_lock, 5481 .mand_unlock_range = smb2_unlock_range, 5482 .push_mand_locks = smb2_push_mandatory_locks, 5483 .get_lease_key = smb2_get_lease_key, 5484 .set_lease_key = smb2_set_lease_key, 5485 .new_lease_key = smb2_new_lease_key, 5486 .generate_signingkey = generate_smb30signingkey, 5487 .calc_signature = smb3_calc_signature, 5488 .set_integrity = smb3_set_integrity, 5489 .is_read_op = smb21_is_read_op, 5490 .set_oplock_level = smb3_set_oplock_level, 5491 .create_lease_buf = smb3_create_lease_buf, 5492 .parse_lease_buf = smb3_parse_lease_buf, 5493 .copychunk_range = smb2_copychunk_range, 5494 .duplicate_extents = smb2_duplicate_extents, 5495 .validate_negotiate = smb3_validate_negotiate, 5496 .wp_retry_size = smb2_wp_retry_size, 5497 .dir_needs_close = smb2_dir_needs_close, 5498 .fallocate = smb3_fallocate, 5499 .enum_snapshots = smb3_enum_snapshots, 5500 .notify = smb3_notify, 5501 .init_transform_rq = smb3_init_transform_rq, 5502 .is_transform_hdr = smb3_is_transform_hdr, 5503 .receive_transform = smb3_receive_transform, 5504 .get_dfs_refer = smb2_get_dfs_refer, 5505 .select_sectype = smb2_select_sectype, 5506 #ifdef CONFIG_CIFS_XATTR 5507 .query_all_EAs = smb2_query_eas, 5508 .set_EA = smb2_set_ea, 5509 #endif /* CIFS_XATTR */ 5510 .get_acl = get_smb2_acl, 5511 .get_acl_by_fid = get_smb2_acl_by_fid, 5512 .set_acl = set_smb2_acl, 5513 .next_header = smb2_next_header, 5514 .ioctl_query_info = smb2_ioctl_query_info, 5515 .make_node = smb2_make_node, 5516 .fiemap = smb3_fiemap, 5517 .llseek = smb3_llseek, 5518 .is_status_io_timeout = smb2_is_status_io_timeout, 5519 .is_network_name_deleted = smb2_is_network_name_deleted, 5520 }; 5521 5522 struct smb_version_operations smb311_operations = { 5523 .compare_fids = smb2_compare_fids, 5524 .setup_request = smb2_setup_request, 5525 .setup_async_request = smb2_setup_async_request, 5526 .check_receive = smb2_check_receive, 5527 .add_credits = smb2_add_credits, 5528 .set_credits = smb2_set_credits, 5529 .get_credits_field = smb2_get_credits_field, 5530 .get_credits = smb2_get_credits, 5531 .wait_mtu_credits = smb2_wait_mtu_credits, 5532 .adjust_credits = smb2_adjust_credits, 5533 .get_next_mid = smb2_get_next_mid, 5534 .revert_current_mid = smb2_revert_current_mid, 5535 .read_data_offset = smb2_read_data_offset, 5536 .read_data_length = smb2_read_data_length, 5537 .map_error = map_smb2_to_linux_error, 5538 .find_mid = smb2_find_mid, 5539 .check_message = smb2_check_message, 5540 .dump_detail = smb2_dump_detail, 5541 .clear_stats = smb2_clear_stats, 5542 .print_stats = smb2_print_stats, 5543 .dump_share_caps = smb2_dump_share_caps, 5544 .is_oplock_break = smb2_is_valid_oplock_break, 5545 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5546 .downgrade_oplock = smb3_downgrade_oplock, 5547 .need_neg = smb2_need_neg, 5548 .negotiate = smb2_negotiate, 5549 .negotiate_wsize = smb3_negotiate_wsize, 5550 .negotiate_rsize = smb3_negotiate_rsize, 5551 .sess_setup = SMB2_sess_setup, 5552 .logoff = SMB2_logoff, 5553 .tree_connect = SMB2_tcon, 5554 .tree_disconnect = SMB2_tdis, 5555 .qfs_tcon = smb3_qfs_tcon, 5556 .query_server_interfaces = SMB3_request_interfaces, 5557 .is_path_accessible = smb2_is_path_accessible, 5558 .can_echo = smb2_can_echo, 5559 .echo = SMB2_echo, 5560 .query_path_info = smb2_query_path_info, 5561 .query_reparse_point = smb2_query_reparse_point, 5562 .get_srv_inum = smb2_get_srv_inum, 5563 .query_file_info = smb2_query_file_info, 5564 .set_path_size = smb2_set_path_size, 5565 .set_file_size = smb2_set_file_size, 5566 .set_file_info = smb2_set_file_info, 5567 .set_compression = smb2_set_compression, 5568 .mkdir = smb2_mkdir, 5569 .mkdir_setinfo = smb2_mkdir_setinfo, 5570 .posix_mkdir = smb311_posix_mkdir, 5571 .rmdir = smb2_rmdir, 5572 .unlink = smb2_unlink, 5573 .rename = smb2_rename_path, 5574 .create_hardlink = smb2_create_hardlink, 5575 .parse_reparse_point = smb2_parse_reparse_point, 5576 .query_mf_symlink = smb3_query_mf_symlink, 5577 .create_mf_symlink = smb3_create_mf_symlink, 5578 .create_reparse_symlink = smb2_create_reparse_symlink, 5579 .open = smb2_open_file, 5580 .set_fid = smb2_set_fid, 5581 .close = smb2_close_file, 5582 .close_getattr = smb2_close_getattr, 5583 .flush = smb2_flush_file, 5584 .async_readv = smb2_async_readv, 5585 .async_writev = smb2_async_writev, 5586 .sync_read = smb2_sync_read, 5587 .sync_write = smb2_sync_write, 5588 .query_dir_first = smb2_query_dir_first, 5589 .query_dir_next = smb2_query_dir_next, 5590 .close_dir = smb2_close_dir, 5591 .calc_smb_size = smb2_calc_size, 5592 .is_status_pending = smb2_is_status_pending, 5593 .is_session_expired = smb2_is_session_expired, 5594 .oplock_response = smb2_oplock_response, 5595 .queryfs = smb311_queryfs, 5596 .mand_lock = smb2_mand_lock, 5597 .mand_unlock_range = smb2_unlock_range, 5598 .push_mand_locks = smb2_push_mandatory_locks, 5599 .get_lease_key = smb2_get_lease_key, 5600 .set_lease_key = smb2_set_lease_key, 5601 .new_lease_key = smb2_new_lease_key, 5602 .generate_signingkey = generate_smb311signingkey, 5603 .calc_signature = smb3_calc_signature, 5604 .set_integrity = smb3_set_integrity, 5605 .is_read_op = smb21_is_read_op, 5606 .set_oplock_level = smb3_set_oplock_level, 5607 .create_lease_buf = smb3_create_lease_buf, 5608 .parse_lease_buf = smb3_parse_lease_buf, 5609 .copychunk_range = smb2_copychunk_range, 5610 .duplicate_extents = smb2_duplicate_extents, 5611 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5612 .wp_retry_size = smb2_wp_retry_size, 5613 .dir_needs_close = smb2_dir_needs_close, 5614 .fallocate = smb3_fallocate, 5615 .enum_snapshots = smb3_enum_snapshots, 5616 .notify = smb3_notify, 5617 .init_transform_rq = smb3_init_transform_rq, 5618 .is_transform_hdr = smb3_is_transform_hdr, 5619 .receive_transform = smb3_receive_transform, 5620 .get_dfs_refer = smb2_get_dfs_refer, 5621 .select_sectype = smb2_select_sectype, 5622 #ifdef CONFIG_CIFS_XATTR 5623 .query_all_EAs = smb2_query_eas, 5624 .set_EA = smb2_set_ea, 5625 #endif /* CIFS_XATTR */ 5626 .get_acl = get_smb2_acl, 5627 .get_acl_by_fid = get_smb2_acl_by_fid, 5628 .set_acl = set_smb2_acl, 5629 .next_header = smb2_next_header, 5630 .ioctl_query_info = smb2_ioctl_query_info, 5631 .make_node = smb2_make_node, 5632 .fiemap = smb3_fiemap, 5633 .llseek = smb3_llseek, 5634 .is_status_io_timeout = smb2_is_status_io_timeout, 5635 .is_network_name_deleted = smb2_is_network_name_deleted, 5636 }; 5637 5638 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5639 struct smb_version_values smb20_values = { 5640 .version_string = SMB20_VERSION_STRING, 5641 .protocol_id = SMB20_PROT_ID, 5642 .req_capabilities = 0, /* MBZ */ 5643 .large_lock_type = 0, 5644 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5645 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5646 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5647 .header_size = sizeof(struct smb2_hdr), 5648 .header_preamble_size = 0, 5649 .max_header_size = MAX_SMB2_HDR_SIZE, 5650 .read_rsp_size = sizeof(struct smb2_read_rsp), 5651 .lock_cmd = SMB2_LOCK, 5652 .cap_unix = 0, 5653 .cap_nt_find = SMB2_NT_FIND, 5654 .cap_large_files = SMB2_LARGE_FILES, 5655 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5656 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5657 .create_lease_size = sizeof(struct create_lease), 5658 }; 5659 #endif /* ALLOW_INSECURE_LEGACY */ 5660 5661 struct smb_version_values smb21_values = { 5662 .version_string = SMB21_VERSION_STRING, 5663 .protocol_id = SMB21_PROT_ID, 5664 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5665 .large_lock_type = 0, 5666 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5667 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5668 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5669 .header_size = sizeof(struct smb2_hdr), 5670 .header_preamble_size = 0, 5671 .max_header_size = MAX_SMB2_HDR_SIZE, 5672 .read_rsp_size = sizeof(struct smb2_read_rsp), 5673 .lock_cmd = SMB2_LOCK, 5674 .cap_unix = 0, 5675 .cap_nt_find = SMB2_NT_FIND, 5676 .cap_large_files = SMB2_LARGE_FILES, 5677 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5678 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5679 .create_lease_size = sizeof(struct create_lease), 5680 }; 5681 5682 struct smb_version_values smb3any_values = { 5683 .version_string = SMB3ANY_VERSION_STRING, 5684 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5685 .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, 5686 .large_lock_type = 0, 5687 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5688 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5689 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5690 .header_size = sizeof(struct smb2_hdr), 5691 .header_preamble_size = 0, 5692 .max_header_size = MAX_SMB2_HDR_SIZE, 5693 .read_rsp_size = sizeof(struct smb2_read_rsp), 5694 .lock_cmd = SMB2_LOCK, 5695 .cap_unix = 0, 5696 .cap_nt_find = SMB2_NT_FIND, 5697 .cap_large_files = SMB2_LARGE_FILES, 5698 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5699 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5700 .create_lease_size = sizeof(struct create_lease_v2), 5701 }; 5702 5703 struct smb_version_values smbdefault_values = { 5704 .version_string = SMBDEFAULT_VERSION_STRING, 5705 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5706 .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, 5707 .large_lock_type = 0, 5708 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5709 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5710 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5711 .header_size = sizeof(struct smb2_hdr), 5712 .header_preamble_size = 0, 5713 .max_header_size = MAX_SMB2_HDR_SIZE, 5714 .read_rsp_size = sizeof(struct smb2_read_rsp), 5715 .lock_cmd = SMB2_LOCK, 5716 .cap_unix = 0, 5717 .cap_nt_find = SMB2_NT_FIND, 5718 .cap_large_files = SMB2_LARGE_FILES, 5719 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5720 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5721 .create_lease_size = sizeof(struct create_lease_v2), 5722 }; 5723 5724 struct smb_version_values smb30_values = { 5725 .version_string = SMB30_VERSION_STRING, 5726 .protocol_id = SMB30_PROT_ID, 5727 .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, 5728 .large_lock_type = 0, 5729 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5730 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5731 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5732 .header_size = sizeof(struct smb2_hdr), 5733 .header_preamble_size = 0, 5734 .max_header_size = MAX_SMB2_HDR_SIZE, 5735 .read_rsp_size = sizeof(struct smb2_read_rsp), 5736 .lock_cmd = SMB2_LOCK, 5737 .cap_unix = 0, 5738 .cap_nt_find = SMB2_NT_FIND, 5739 .cap_large_files = SMB2_LARGE_FILES, 5740 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5741 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5742 .create_lease_size = sizeof(struct create_lease_v2), 5743 }; 5744 5745 struct smb_version_values smb302_values = { 5746 .version_string = SMB302_VERSION_STRING, 5747 .protocol_id = SMB302_PROT_ID, 5748 .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, 5749 .large_lock_type = 0, 5750 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5751 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5752 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5753 .header_size = sizeof(struct smb2_hdr), 5754 .header_preamble_size = 0, 5755 .max_header_size = MAX_SMB2_HDR_SIZE, 5756 .read_rsp_size = sizeof(struct smb2_read_rsp), 5757 .lock_cmd = SMB2_LOCK, 5758 .cap_unix = 0, 5759 .cap_nt_find = SMB2_NT_FIND, 5760 .cap_large_files = SMB2_LARGE_FILES, 5761 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5762 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5763 .create_lease_size = sizeof(struct create_lease_v2), 5764 }; 5765 5766 struct smb_version_values smb311_values = { 5767 .version_string = SMB311_VERSION_STRING, 5768 .protocol_id = SMB311_PROT_ID, 5769 .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, 5770 .large_lock_type = 0, 5771 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5772 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5773 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5774 .header_size = sizeof(struct smb2_hdr), 5775 .header_preamble_size = 0, 5776 .max_header_size = MAX_SMB2_HDR_SIZE, 5777 .read_rsp_size = sizeof(struct smb2_read_rsp), 5778 .lock_cmd = SMB2_LOCK, 5779 .cap_unix = 0, 5780 .cap_nt_find = SMB2_NT_FIND, 5781 .cap_large_files = SMB2_LARGE_FILES, 5782 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5783 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5784 .create_lease_size = sizeof(struct create_lease_v2), 5785 }; 5786