1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <uapi/linux/magic.h> 17 #include "cifsfs.h" 18 #include "cifsglob.h" 19 #include "smb2pdu.h" 20 #include "smb2proto.h" 21 #include "cifsproto.h" 22 #include "cifs_debug.h" 23 #include "cifs_unicode.h" 24 #include "smb2status.h" 25 #include "smb2glob.h" 26 #include "cifs_ioctl.h" 27 #include "smbdirect.h" 28 #include "fscache.h" 29 #include "fs_context.h" 30 #include "cached_dir.h" 31 #include "reparse.h" 32 33 /* Change credits for different ops and return the total number of credits */ 34 static int 35 change_conf(struct TCP_Server_Info *server) 36 { 37 server->credits += server->echo_credits + server->oplock_credits; 38 if (server->credits > server->max_credits) 39 server->credits = server->max_credits; 40 server->oplock_credits = server->echo_credits = 0; 41 switch (server->credits) { 42 case 0: 43 return 0; 44 case 1: 45 server->echoes = false; 46 server->oplocks = false; 47 break; 48 case 2: 49 server->echoes = true; 50 server->oplocks = false; 51 server->echo_credits = 1; 52 break; 53 default: 54 server->echoes = true; 55 if (enable_oplocks) { 56 server->oplocks = true; 57 server->oplock_credits = 1; 58 } else 59 server->oplocks = false; 60 61 server->echo_credits = 1; 62 } 63 server->credits -= server->echo_credits + server->oplock_credits; 64 return server->credits + server->echo_credits + server->oplock_credits; 65 } 66 67 static void 68 smb2_add_credits(struct TCP_Server_Info *server, 69 const struct cifs_credits *credits, const int optype) 70 { 71 int *val, rc = -1; 72 int scredits, in_flight; 73 unsigned int add = credits->value; 74 unsigned int instance = credits->instance; 75 bool reconnect_detected = false; 76 bool reconnect_with_invalid_credits = false; 77 78 spin_lock(&server->req_lock); 79 val = server->ops->get_credits_field(server, optype); 80 81 /* eg found case where write overlapping reconnect messed up credits */ 82 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 83 reconnect_with_invalid_credits = true; 84 85 if ((instance == 0) || (instance == server->reconnect_instance)) 86 *val += add; 87 else 88 reconnect_detected = true; 89 90 if (*val > 65000) { 91 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 92 pr_warn_once("server overflowed SMB3 credits\n"); 93 trace_smb3_overflow_credits(server->CurrentMid, 94 server->conn_id, server->hostname, *val, 95 add, server->in_flight); 96 } 97 WARN_ON_ONCE(server->in_flight == 0); 98 server->in_flight--; 99 if (server->in_flight == 0 && 100 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 101 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 102 rc = change_conf(server); 103 /* 104 * Sometimes server returns 0 credits on oplock break ack - we need to 105 * rebalance credits in this case. 106 */ 107 else if (server->in_flight > 0 && server->oplock_credits == 0 && 108 server->oplocks) { 109 if (server->credits > 1) { 110 server->credits--; 111 server->oplock_credits++; 112 } 113 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 114 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 115 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 116 change_conf(server); 117 118 scredits = *val; 119 in_flight = server->in_flight; 120 spin_unlock(&server->req_lock); 121 wake_up(&server->request_q); 122 123 if (reconnect_detected) { 124 trace_smb3_reconnect_detected(server->CurrentMid, 125 server->conn_id, server->hostname, scredits, add, in_flight); 126 127 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 128 add, instance); 129 } 130 131 if (reconnect_with_invalid_credits) { 132 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 133 server->conn_id, server->hostname, scredits, add, in_flight); 134 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 135 optype, scredits, add); 136 } 137 138 spin_lock(&server->srv_lock); 139 if (server->tcpStatus == CifsNeedReconnect 140 || server->tcpStatus == CifsExiting) { 141 spin_unlock(&server->srv_lock); 142 return; 143 } 144 spin_unlock(&server->srv_lock); 145 146 switch (rc) { 147 case -1: 148 /* change_conf hasn't been executed */ 149 break; 150 case 0: 151 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 152 break; 153 case 1: 154 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 155 break; 156 case 2: 157 cifs_dbg(FYI, "disabling oplocks\n"); 158 break; 159 default: 160 /* change_conf rebalanced credits for different types */ 161 break; 162 } 163 164 trace_smb3_add_credits(server->CurrentMid, 165 server->conn_id, server->hostname, scredits, add, in_flight); 166 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 167 } 168 169 static void 170 smb2_set_credits(struct TCP_Server_Info *server, const int val) 171 { 172 int scredits, in_flight; 173 174 spin_lock(&server->req_lock); 175 server->credits = val; 176 if (val == 1) { 177 server->reconnect_instance++; 178 /* 179 * ChannelSequence updated for all channels in primary channel so that consistent 180 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 181 */ 182 if (SERVER_IS_CHAN(server)) 183 server->primary_server->channel_sequence_num++; 184 else 185 server->channel_sequence_num++; 186 } 187 scredits = server->credits; 188 in_flight = server->in_flight; 189 spin_unlock(&server->req_lock); 190 191 trace_smb3_set_credits(server->CurrentMid, 192 server->conn_id, server->hostname, scredits, val, in_flight); 193 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 194 195 /* don't log while holding the lock */ 196 if (val == 1) 197 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 198 } 199 200 static int * 201 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 202 { 203 switch (optype) { 204 case CIFS_ECHO_OP: 205 return &server->echo_credits; 206 case CIFS_OBREAK_OP: 207 return &server->oplock_credits; 208 default: 209 return &server->credits; 210 } 211 } 212 213 static unsigned int 214 smb2_get_credits(struct mid_q_entry *mid) 215 { 216 return mid->credits_received; 217 } 218 219 static int 220 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 221 unsigned int *num, struct cifs_credits *credits) 222 { 223 int rc = 0; 224 unsigned int scredits, in_flight; 225 226 spin_lock(&server->req_lock); 227 while (1) { 228 spin_unlock(&server->req_lock); 229 230 spin_lock(&server->srv_lock); 231 if (server->tcpStatus == CifsExiting) { 232 spin_unlock(&server->srv_lock); 233 return -ENOENT; 234 } 235 spin_unlock(&server->srv_lock); 236 237 spin_lock(&server->req_lock); 238 if (server->credits <= 0) { 239 spin_unlock(&server->req_lock); 240 cifs_num_waiters_inc(server); 241 rc = wait_event_killable(server->request_q, 242 has_credits(server, &server->credits, 1)); 243 cifs_num_waiters_dec(server); 244 if (rc) 245 return rc; 246 spin_lock(&server->req_lock); 247 } else { 248 scredits = server->credits; 249 /* can deadlock with reopen */ 250 if (scredits <= 8) { 251 *num = SMB2_MAX_BUFFER_SIZE; 252 credits->value = 0; 253 credits->instance = 0; 254 break; 255 } 256 257 /* leave some credits for reopen and other ops */ 258 scredits -= 8; 259 *num = min_t(unsigned int, size, 260 scredits * SMB2_MAX_BUFFER_SIZE); 261 262 credits->value = 263 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 264 credits->instance = server->reconnect_instance; 265 server->credits -= credits->value; 266 server->in_flight++; 267 if (server->in_flight > server->max_in_flight) 268 server->max_in_flight = server->in_flight; 269 break; 270 } 271 } 272 scredits = server->credits; 273 in_flight = server->in_flight; 274 spin_unlock(&server->req_lock); 275 276 trace_smb3_wait_credits(server->CurrentMid, 277 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 278 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 279 __func__, credits->value, scredits); 280 281 return rc; 282 } 283 284 static int 285 smb2_adjust_credits(struct TCP_Server_Info *server, 286 struct cifs_credits *credits, 287 const unsigned int payload_size) 288 { 289 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 290 int scredits, in_flight; 291 292 if (!credits->value || credits->value == new_val) 293 return 0; 294 295 if (credits->value < new_val) { 296 trace_smb3_too_many_credits(server->CurrentMid, 297 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 298 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 299 credits->value, new_val); 300 301 return -EOPNOTSUPP; 302 } 303 304 spin_lock(&server->req_lock); 305 306 if (server->reconnect_instance != credits->instance) { 307 scredits = server->credits; 308 in_flight = server->in_flight; 309 spin_unlock(&server->req_lock); 310 311 trace_smb3_reconnect_detected(server->CurrentMid, 312 server->conn_id, server->hostname, scredits, 313 credits->value - new_val, in_flight); 314 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 315 credits->value - new_val); 316 return -EAGAIN; 317 } 318 319 server->credits += credits->value - new_val; 320 scredits = server->credits; 321 in_flight = server->in_flight; 322 spin_unlock(&server->req_lock); 323 wake_up(&server->request_q); 324 325 trace_smb3_adj_credits(server->CurrentMid, 326 server->conn_id, server->hostname, scredits, 327 credits->value - new_val, in_flight); 328 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 329 __func__, credits->value - new_val, scredits); 330 331 credits->value = new_val; 332 333 return 0; 334 } 335 336 static __u64 337 smb2_get_next_mid(struct TCP_Server_Info *server) 338 { 339 __u64 mid; 340 /* for SMB2 we need the current value */ 341 spin_lock(&server->mid_lock); 342 mid = server->CurrentMid++; 343 spin_unlock(&server->mid_lock); 344 return mid; 345 } 346 347 static void 348 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 349 { 350 spin_lock(&server->mid_lock); 351 if (server->CurrentMid >= val) 352 server->CurrentMid -= val; 353 spin_unlock(&server->mid_lock); 354 } 355 356 static struct mid_q_entry * 357 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 358 { 359 struct mid_q_entry *mid; 360 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 361 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 362 363 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 364 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 365 return NULL; 366 } 367 368 spin_lock(&server->mid_lock); 369 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 370 if ((mid->mid == wire_mid) && 371 (mid->mid_state == MID_REQUEST_SUBMITTED) && 372 (mid->command == shdr->Command)) { 373 kref_get(&mid->refcount); 374 if (dequeue) { 375 list_del_init(&mid->qhead); 376 mid->mid_flags |= MID_DELETED; 377 } 378 spin_unlock(&server->mid_lock); 379 return mid; 380 } 381 } 382 spin_unlock(&server->mid_lock); 383 return NULL; 384 } 385 386 static struct mid_q_entry * 387 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 388 { 389 return __smb2_find_mid(server, buf, false); 390 } 391 392 static struct mid_q_entry * 393 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 394 { 395 return __smb2_find_mid(server, buf, true); 396 } 397 398 static void 399 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 400 { 401 #ifdef CONFIG_CIFS_DEBUG2 402 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 403 404 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 405 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 406 shdr->Id.SyncId.ProcessId); 407 if (!server->ops->check_message(buf, server->total_read, server)) { 408 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 409 server->ops->calc_smb_size(buf)); 410 } 411 #endif 412 } 413 414 static bool 415 smb2_need_neg(struct TCP_Server_Info *server) 416 { 417 return server->max_read == 0; 418 } 419 420 static int 421 smb2_negotiate(const unsigned int xid, 422 struct cifs_ses *ses, 423 struct TCP_Server_Info *server) 424 { 425 int rc; 426 427 spin_lock(&server->mid_lock); 428 server->CurrentMid = 0; 429 spin_unlock(&server->mid_lock); 430 rc = SMB2_negotiate(xid, ses, server); 431 /* BB we probably don't need to retry with modern servers */ 432 if (rc == -EAGAIN) 433 rc = -EHOSTDOWN; 434 return rc; 435 } 436 437 static unsigned int 438 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 439 { 440 struct TCP_Server_Info *server = tcon->ses->server; 441 unsigned int wsize; 442 443 /* start with specified wsize, or default */ 444 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 445 wsize = min_t(unsigned int, wsize, server->max_write); 446 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 447 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 448 449 return wsize; 450 } 451 452 static unsigned int 453 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 454 { 455 struct TCP_Server_Info *server = tcon->ses->server; 456 unsigned int wsize; 457 458 /* start with specified wsize, or default */ 459 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 460 wsize = min_t(unsigned int, wsize, server->max_write); 461 #ifdef CONFIG_CIFS_SMB_DIRECT 462 if (server->rdma) { 463 if (server->sign) 464 /* 465 * Account for SMB2 data transfer packet header and 466 * possible encryption header 467 */ 468 wsize = min_t(unsigned int, 469 wsize, 470 server->smbd_conn->max_fragmented_send_size - 471 SMB2_READWRITE_PDU_HEADER_SIZE - 472 sizeof(struct smb2_transform_hdr)); 473 else 474 wsize = min_t(unsigned int, 475 wsize, server->smbd_conn->max_readwrite_size); 476 } 477 #endif 478 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 479 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 480 481 return wsize; 482 } 483 484 static unsigned int 485 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 486 { 487 struct TCP_Server_Info *server = tcon->ses->server; 488 unsigned int rsize; 489 490 /* start with specified rsize, or default */ 491 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 492 rsize = min_t(unsigned int, rsize, server->max_read); 493 494 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 495 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 496 497 return rsize; 498 } 499 500 static unsigned int 501 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 502 { 503 struct TCP_Server_Info *server = tcon->ses->server; 504 unsigned int rsize; 505 506 /* start with specified rsize, or default */ 507 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 508 rsize = min_t(unsigned int, rsize, server->max_read); 509 #ifdef CONFIG_CIFS_SMB_DIRECT 510 if (server->rdma) { 511 if (server->sign) 512 /* 513 * Account for SMB2 data transfer packet header and 514 * possible encryption header 515 */ 516 rsize = min_t(unsigned int, 517 rsize, 518 server->smbd_conn->max_fragmented_recv_size - 519 SMB2_READWRITE_PDU_HEADER_SIZE - 520 sizeof(struct smb2_transform_hdr)); 521 else 522 rsize = min_t(unsigned int, 523 rsize, server->smbd_conn->max_readwrite_size); 524 } 525 #endif 526 527 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 528 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 529 530 return rsize; 531 } 532 533 /* 534 * compare two interfaces a and b 535 * return 0 if everything matches. 536 * return 1 if a is rdma capable, or rss capable, or has higher link speed 537 * return -1 otherwise. 538 */ 539 static int 540 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 541 { 542 int cmp_ret = 0; 543 544 WARN_ON(!a || !b); 545 if (a->rdma_capable == b->rdma_capable) { 546 if (a->rss_capable == b->rss_capable) { 547 if (a->speed == b->speed) { 548 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 549 (struct sockaddr *) &b->sockaddr); 550 if (!cmp_ret) 551 return 0; 552 else if (cmp_ret > 0) 553 return 1; 554 else 555 return -1; 556 } else if (a->speed > b->speed) 557 return 1; 558 else 559 return -1; 560 } else if (a->rss_capable > b->rss_capable) 561 return 1; 562 else 563 return -1; 564 } else if (a->rdma_capable > b->rdma_capable) 565 return 1; 566 else 567 return -1; 568 } 569 570 static int 571 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 572 size_t buf_len, struct cifs_ses *ses, bool in_mount) 573 { 574 struct network_interface_info_ioctl_rsp *p; 575 struct sockaddr_in *addr4; 576 struct sockaddr_in6 *addr6; 577 struct iface_info_ipv4 *p4; 578 struct iface_info_ipv6 *p6; 579 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 580 struct cifs_server_iface tmp_iface; 581 ssize_t bytes_left; 582 size_t next = 0; 583 int nb_iface = 0; 584 int rc = 0, ret = 0; 585 586 bytes_left = buf_len; 587 p = buf; 588 589 spin_lock(&ses->iface_lock); 590 /* do not query too frequently, this time with lock held */ 591 if (ses->iface_last_update && 592 time_before(jiffies, ses->iface_last_update + 593 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 594 spin_unlock(&ses->iface_lock); 595 return 0; 596 } 597 598 /* 599 * Go through iface_list and mark them as inactive 600 */ 601 list_for_each_entry_safe(iface, niface, &ses->iface_list, 602 iface_head) 603 iface->is_active = 0; 604 605 spin_unlock(&ses->iface_lock); 606 607 /* 608 * Samba server e.g. can return an empty interface list in some cases, 609 * which would only be a problem if we were requesting multichannel 610 */ 611 if (bytes_left == 0) { 612 /* avoid spamming logs every 10 minutes, so log only in mount */ 613 if ((ses->chan_max > 1) && in_mount) 614 cifs_dbg(VFS, 615 "multichannel not available\n" 616 "Empty network interface list returned by server %s\n", 617 ses->server->hostname); 618 rc = -EOPNOTSUPP; 619 ses->iface_last_update = jiffies; 620 goto out; 621 } 622 623 while (bytes_left >= (ssize_t)sizeof(*p)) { 624 memset(&tmp_iface, 0, sizeof(tmp_iface)); 625 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 626 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 627 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 628 629 switch (p->Family) { 630 /* 631 * The kernel and wire socket structures have the same 632 * layout and use network byte order but make the 633 * conversion explicit in case either one changes. 634 */ 635 case INTERNETWORK: 636 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 637 p4 = (struct iface_info_ipv4 *)p->Buffer; 638 addr4->sin_family = AF_INET; 639 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 640 641 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 642 addr4->sin_port = cpu_to_be16(CIFS_PORT); 643 644 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 645 &addr4->sin_addr); 646 break; 647 case INTERNETWORKV6: 648 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 649 p6 = (struct iface_info_ipv6 *)p->Buffer; 650 addr6->sin6_family = AF_INET6; 651 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 652 653 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 654 addr6->sin6_flowinfo = 0; 655 addr6->sin6_scope_id = 0; 656 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 657 658 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 659 &addr6->sin6_addr); 660 break; 661 default: 662 cifs_dbg(VFS, 663 "%s: skipping unsupported socket family\n", 664 __func__); 665 goto next_iface; 666 } 667 668 /* 669 * The iface_list is assumed to be sorted by speed. 670 * Check if the new interface exists in that list. 671 * NEVER change iface. it could be in use. 672 * Add a new one instead 673 */ 674 spin_lock(&ses->iface_lock); 675 list_for_each_entry_safe(iface, niface, &ses->iface_list, 676 iface_head) { 677 ret = iface_cmp(iface, &tmp_iface); 678 if (!ret) { 679 iface->is_active = 1; 680 spin_unlock(&ses->iface_lock); 681 goto next_iface; 682 } else if (ret < 0) { 683 /* all remaining ifaces are slower */ 684 kref_get(&iface->refcount); 685 break; 686 } 687 } 688 spin_unlock(&ses->iface_lock); 689 690 /* no match. insert the entry in the list */ 691 info = kmalloc(sizeof(struct cifs_server_iface), 692 GFP_KERNEL); 693 if (!info) { 694 rc = -ENOMEM; 695 goto out; 696 } 697 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 698 699 /* add this new entry to the list */ 700 kref_init(&info->refcount); 701 info->is_active = 1; 702 703 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 704 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 705 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 706 le32_to_cpu(p->Capability)); 707 708 spin_lock(&ses->iface_lock); 709 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 710 list_add_tail(&info->iface_head, &iface->iface_head); 711 kref_put(&iface->refcount, release_iface); 712 } else 713 list_add_tail(&info->iface_head, &ses->iface_list); 714 715 ses->iface_count++; 716 spin_unlock(&ses->iface_lock); 717 next_iface: 718 nb_iface++; 719 next = le32_to_cpu(p->Next); 720 if (!next) { 721 bytes_left -= sizeof(*p); 722 break; 723 } 724 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 725 bytes_left -= next; 726 } 727 728 if (!nb_iface) { 729 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 730 rc = -EINVAL; 731 goto out; 732 } 733 734 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 735 if ((bytes_left > 8) || p->Next) 736 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 737 738 ses->iface_last_update = jiffies; 739 740 out: 741 /* 742 * Go through the list again and put the inactive entries 743 */ 744 spin_lock(&ses->iface_lock); 745 list_for_each_entry_safe(iface, niface, &ses->iface_list, 746 iface_head) { 747 if (!iface->is_active) { 748 list_del(&iface->iface_head); 749 kref_put(&iface->refcount, release_iface); 750 ses->iface_count--; 751 } 752 } 753 spin_unlock(&ses->iface_lock); 754 755 return rc; 756 } 757 758 int 759 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 760 { 761 int rc; 762 unsigned int ret_data_len = 0; 763 struct network_interface_info_ioctl_rsp *out_buf = NULL; 764 struct cifs_ses *ses = tcon->ses; 765 struct TCP_Server_Info *pserver; 766 767 /* do not query too frequently */ 768 if (ses->iface_last_update && 769 time_before(jiffies, ses->iface_last_update + 770 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 771 return 0; 772 773 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 774 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 775 NULL /* no data input */, 0 /* no data input */, 776 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 777 if (rc == -EOPNOTSUPP) { 778 cifs_dbg(FYI, 779 "server does not support query network interfaces\n"); 780 ret_data_len = 0; 781 } else if (rc != 0) { 782 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 783 goto out; 784 } 785 786 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 787 if (rc) 788 goto out; 789 790 /* check if iface is still active */ 791 spin_lock(&ses->chan_lock); 792 pserver = ses->chans[0].server; 793 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 794 spin_unlock(&ses->chan_lock); 795 cifs_chan_update_iface(ses, pserver); 796 spin_lock(&ses->chan_lock); 797 } 798 spin_unlock(&ses->chan_lock); 799 800 out: 801 kfree(out_buf); 802 return rc; 803 } 804 805 static void 806 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 807 struct cifs_sb_info *cifs_sb) 808 { 809 int rc; 810 __le16 srch_path = 0; /* Null - open root of share */ 811 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 812 struct cifs_open_parms oparms; 813 struct cifs_fid fid; 814 struct cached_fid *cfid = NULL; 815 816 oparms = (struct cifs_open_parms) { 817 .tcon = tcon, 818 .path = "", 819 .desired_access = FILE_READ_ATTRIBUTES, 820 .disposition = FILE_OPEN, 821 .create_options = cifs_create_options(cifs_sb, 0), 822 .fid = &fid, 823 }; 824 825 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 826 if (rc == 0) 827 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 828 else 829 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 830 NULL, NULL); 831 if (rc) 832 return; 833 834 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 835 836 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 837 FS_ATTRIBUTE_INFORMATION); 838 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 839 FS_DEVICE_INFORMATION); 840 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 841 FS_VOLUME_INFORMATION); 842 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 843 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 844 if (cfid == NULL) 845 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 846 else 847 close_cached_dir(cfid); 848 } 849 850 static void 851 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 852 struct cifs_sb_info *cifs_sb) 853 { 854 int rc; 855 __le16 srch_path = 0; /* Null - open root of share */ 856 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 857 struct cifs_open_parms oparms; 858 struct cifs_fid fid; 859 860 oparms = (struct cifs_open_parms) { 861 .tcon = tcon, 862 .path = "", 863 .desired_access = FILE_READ_ATTRIBUTES, 864 .disposition = FILE_OPEN, 865 .create_options = cifs_create_options(cifs_sb, 0), 866 .fid = &fid, 867 }; 868 869 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 870 NULL, NULL); 871 if (rc) 872 return; 873 874 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 875 FS_ATTRIBUTE_INFORMATION); 876 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 877 FS_DEVICE_INFORMATION); 878 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 879 } 880 881 static int 882 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 883 struct cifs_sb_info *cifs_sb, const char *full_path) 884 { 885 __le16 *utf16_path; 886 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 887 int err_buftype = CIFS_NO_BUFFER; 888 struct cifs_open_parms oparms; 889 struct kvec err_iov = {}; 890 struct cifs_fid fid; 891 struct cached_fid *cfid; 892 bool islink; 893 int rc, rc2; 894 895 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 896 if (!rc) { 897 if (cfid->has_lease) { 898 close_cached_dir(cfid); 899 return 0; 900 } 901 close_cached_dir(cfid); 902 } 903 904 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 905 if (!utf16_path) 906 return -ENOMEM; 907 908 oparms = (struct cifs_open_parms) { 909 .tcon = tcon, 910 .path = full_path, 911 .desired_access = FILE_READ_ATTRIBUTES, 912 .disposition = FILE_OPEN, 913 .create_options = cifs_create_options(cifs_sb, 0), 914 .fid = &fid, 915 }; 916 917 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 918 &err_iov, &err_buftype); 919 if (rc) { 920 struct smb2_hdr *hdr = err_iov.iov_base; 921 922 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 923 goto out; 924 925 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 926 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 927 full_path, &islink); 928 if (rc2) { 929 rc = rc2; 930 goto out; 931 } 932 if (islink) 933 rc = -EREMOTE; 934 } 935 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 936 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 937 rc = -EOPNOTSUPP; 938 goto out; 939 } 940 941 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 942 943 out: 944 free_rsp_buf(err_buftype, err_iov.iov_base); 945 kfree(utf16_path); 946 return rc; 947 } 948 949 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 950 struct cifs_sb_info *cifs_sb, const char *full_path, 951 u64 *uniqueid, struct cifs_open_info_data *data) 952 { 953 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 954 return 0; 955 } 956 957 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 958 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 959 { 960 struct cifs_fid *fid = &cfile->fid; 961 962 if (cfile->symlink_target) { 963 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 964 if (!data->symlink_target) 965 return -ENOMEM; 966 } 967 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 968 } 969 970 #ifdef CONFIG_CIFS_XATTR 971 static ssize_t 972 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 973 struct smb2_file_full_ea_info *src, size_t src_size, 974 const unsigned char *ea_name) 975 { 976 int rc = 0; 977 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 978 char *name, *value; 979 size_t buf_size = dst_size; 980 size_t name_len, value_len, user_name_len; 981 982 while (src_size > 0) { 983 name_len = (size_t)src->ea_name_length; 984 value_len = (size_t)le16_to_cpu(src->ea_value_length); 985 986 if (name_len == 0) 987 break; 988 989 if (src_size < 8 + name_len + 1 + value_len) { 990 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 991 rc = -EIO; 992 goto out; 993 } 994 995 name = &src->ea_data[0]; 996 value = &src->ea_data[src->ea_name_length + 1]; 997 998 if (ea_name) { 999 if (ea_name_len == name_len && 1000 memcmp(ea_name, name, name_len) == 0) { 1001 rc = value_len; 1002 if (dst_size == 0) 1003 goto out; 1004 if (dst_size < value_len) { 1005 rc = -ERANGE; 1006 goto out; 1007 } 1008 memcpy(dst, value, value_len); 1009 goto out; 1010 } 1011 } else { 1012 /* 'user.' plus a terminating null */ 1013 user_name_len = 5 + 1 + name_len; 1014 1015 if (buf_size == 0) { 1016 /* skip copy - calc size only */ 1017 rc += user_name_len; 1018 } else if (dst_size >= user_name_len) { 1019 dst_size -= user_name_len; 1020 memcpy(dst, "user.", 5); 1021 dst += 5; 1022 memcpy(dst, src->ea_data, name_len); 1023 dst += name_len; 1024 *dst = 0; 1025 ++dst; 1026 rc += user_name_len; 1027 } else { 1028 /* stop before overrun buffer */ 1029 rc = -ERANGE; 1030 break; 1031 } 1032 } 1033 1034 if (!src->next_entry_offset) 1035 break; 1036 1037 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1038 /* stop before overrun buffer */ 1039 rc = -ERANGE; 1040 break; 1041 } 1042 src_size -= le32_to_cpu(src->next_entry_offset); 1043 src = (void *)((char *)src + 1044 le32_to_cpu(src->next_entry_offset)); 1045 } 1046 1047 /* didn't find the named attribute */ 1048 if (ea_name) 1049 rc = -ENODATA; 1050 1051 out: 1052 return (ssize_t)rc; 1053 } 1054 1055 static ssize_t 1056 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1057 const unsigned char *path, const unsigned char *ea_name, 1058 char *ea_data, size_t buf_size, 1059 struct cifs_sb_info *cifs_sb) 1060 { 1061 int rc; 1062 struct kvec rsp_iov = {NULL, 0}; 1063 int buftype = CIFS_NO_BUFFER; 1064 struct smb2_query_info_rsp *rsp; 1065 struct smb2_file_full_ea_info *info = NULL; 1066 1067 rc = smb2_query_info_compound(xid, tcon, path, 1068 FILE_READ_EA, 1069 FILE_FULL_EA_INFORMATION, 1070 SMB2_O_INFO_FILE, 1071 CIFSMaxBufSize - 1072 MAX_SMB2_CREATE_RESPONSE_SIZE - 1073 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1074 &rsp_iov, &buftype, cifs_sb); 1075 if (rc) { 1076 /* 1077 * If ea_name is NULL (listxattr) and there are no EAs, 1078 * return 0 as it's not an error. Otherwise, the specified 1079 * ea_name was not found. 1080 */ 1081 if (!ea_name && rc == -ENODATA) 1082 rc = 0; 1083 goto qeas_exit; 1084 } 1085 1086 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1087 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1088 le32_to_cpu(rsp->OutputBufferLength), 1089 &rsp_iov, 1090 sizeof(struct smb2_file_full_ea_info)); 1091 if (rc) 1092 goto qeas_exit; 1093 1094 info = (struct smb2_file_full_ea_info *)( 1095 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1096 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1097 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1098 1099 qeas_exit: 1100 free_rsp_buf(buftype, rsp_iov.iov_base); 1101 return rc; 1102 } 1103 1104 static int 1105 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1106 const char *path, const char *ea_name, const void *ea_value, 1107 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1108 struct cifs_sb_info *cifs_sb) 1109 { 1110 struct smb2_compound_vars *vars; 1111 struct cifs_ses *ses = tcon->ses; 1112 struct TCP_Server_Info *server; 1113 struct smb_rqst *rqst; 1114 struct kvec *rsp_iov; 1115 __le16 *utf16_path = NULL; 1116 int ea_name_len = strlen(ea_name); 1117 int flags = CIFS_CP_CREATE_CLOSE_OP; 1118 int len; 1119 int resp_buftype[3]; 1120 struct cifs_open_parms oparms; 1121 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1122 struct cifs_fid fid; 1123 unsigned int size[1]; 1124 void *data[1]; 1125 struct smb2_file_full_ea_info *ea; 1126 struct smb2_query_info_rsp *rsp; 1127 int rc, used_len = 0; 1128 int retries = 0, cur_sleep = 1; 1129 1130 replay_again: 1131 /* reinitialize for possible replay */ 1132 flags = CIFS_CP_CREATE_CLOSE_OP; 1133 oplock = SMB2_OPLOCK_LEVEL_NONE; 1134 server = cifs_pick_channel(ses); 1135 1136 if (smb3_encryption_required(tcon)) 1137 flags |= CIFS_TRANSFORM_REQ; 1138 1139 if (ea_name_len > 255) 1140 return -EINVAL; 1141 1142 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1143 if (!utf16_path) 1144 return -ENOMEM; 1145 1146 ea = NULL; 1147 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1148 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1149 if (!vars) { 1150 rc = -ENOMEM; 1151 goto out_free_path; 1152 } 1153 rqst = vars->rqst; 1154 rsp_iov = vars->rsp_iov; 1155 1156 if (ses->server->ops->query_all_EAs) { 1157 if (!ea_value) { 1158 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1159 ea_name, NULL, 0, 1160 cifs_sb); 1161 if (rc == -ENODATA) 1162 goto sea_exit; 1163 } else { 1164 /* If we are adding a attribute we should first check 1165 * if there will be enough space available to store 1166 * the new EA. If not we should not add it since we 1167 * would not be able to even read the EAs back. 1168 */ 1169 rc = smb2_query_info_compound(xid, tcon, path, 1170 FILE_READ_EA, 1171 FILE_FULL_EA_INFORMATION, 1172 SMB2_O_INFO_FILE, 1173 CIFSMaxBufSize - 1174 MAX_SMB2_CREATE_RESPONSE_SIZE - 1175 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1176 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1177 if (rc == 0) { 1178 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1179 used_len = le32_to_cpu(rsp->OutputBufferLength); 1180 } 1181 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1182 resp_buftype[1] = CIFS_NO_BUFFER; 1183 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1184 rc = 0; 1185 1186 /* Use a fudge factor of 256 bytes in case we collide 1187 * with a different set_EAs command. 1188 */ 1189 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1190 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1191 used_len + ea_name_len + ea_value_len + 1) { 1192 rc = -ENOSPC; 1193 goto sea_exit; 1194 } 1195 } 1196 } 1197 1198 /* Open */ 1199 rqst[0].rq_iov = vars->open_iov; 1200 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1201 1202 oparms = (struct cifs_open_parms) { 1203 .tcon = tcon, 1204 .path = path, 1205 .desired_access = FILE_WRITE_EA, 1206 .disposition = FILE_OPEN, 1207 .create_options = cifs_create_options(cifs_sb, 0), 1208 .fid = &fid, 1209 .replay = !!(retries), 1210 }; 1211 1212 rc = SMB2_open_init(tcon, server, 1213 &rqst[0], &oplock, &oparms, utf16_path); 1214 if (rc) 1215 goto sea_exit; 1216 smb2_set_next_command(tcon, &rqst[0]); 1217 1218 1219 /* Set Info */ 1220 rqst[1].rq_iov = vars->si_iov; 1221 rqst[1].rq_nvec = 1; 1222 1223 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1224 ea = kzalloc(len, GFP_KERNEL); 1225 if (ea == NULL) { 1226 rc = -ENOMEM; 1227 goto sea_exit; 1228 } 1229 1230 ea->ea_name_length = ea_name_len; 1231 ea->ea_value_length = cpu_to_le16(ea_value_len); 1232 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1233 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1234 1235 size[0] = len; 1236 data[0] = ea; 1237 1238 rc = SMB2_set_info_init(tcon, server, 1239 &rqst[1], COMPOUND_FID, 1240 COMPOUND_FID, current->tgid, 1241 FILE_FULL_EA_INFORMATION, 1242 SMB2_O_INFO_FILE, 0, data, size); 1243 if (rc) 1244 goto sea_exit; 1245 smb2_set_next_command(tcon, &rqst[1]); 1246 smb2_set_related(&rqst[1]); 1247 1248 /* Close */ 1249 rqst[2].rq_iov = &vars->close_iov; 1250 rqst[2].rq_nvec = 1; 1251 rc = SMB2_close_init(tcon, server, 1252 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1253 if (rc) 1254 goto sea_exit; 1255 smb2_set_related(&rqst[2]); 1256 1257 if (retries) { 1258 smb2_set_replay(server, &rqst[0]); 1259 smb2_set_replay(server, &rqst[1]); 1260 smb2_set_replay(server, &rqst[2]); 1261 } 1262 1263 rc = compound_send_recv(xid, ses, server, 1264 flags, 3, rqst, 1265 resp_buftype, rsp_iov); 1266 /* no need to bump num_remote_opens because handle immediately closed */ 1267 1268 sea_exit: 1269 kfree(ea); 1270 SMB2_open_free(&rqst[0]); 1271 SMB2_set_info_free(&rqst[1]); 1272 SMB2_close_free(&rqst[2]); 1273 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1274 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1275 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1276 kfree(vars); 1277 out_free_path: 1278 kfree(utf16_path); 1279 1280 if (is_replayable_error(rc) && 1281 smb2_should_replay(tcon, &retries, &cur_sleep)) 1282 goto replay_again; 1283 1284 return rc; 1285 } 1286 #endif 1287 1288 static bool 1289 smb2_can_echo(struct TCP_Server_Info *server) 1290 { 1291 return server->echoes; 1292 } 1293 1294 static void 1295 smb2_clear_stats(struct cifs_tcon *tcon) 1296 { 1297 int i; 1298 1299 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1300 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1301 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1302 } 1303 } 1304 1305 static void 1306 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1307 { 1308 seq_puts(m, "\n\tShare Capabilities:"); 1309 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1310 seq_puts(m, " DFS,"); 1311 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1312 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1313 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1314 seq_puts(m, " SCALEOUT,"); 1315 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1316 seq_puts(m, " CLUSTER,"); 1317 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1318 seq_puts(m, " ASYMMETRIC,"); 1319 if (tcon->capabilities == 0) 1320 seq_puts(m, " None"); 1321 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1322 seq_puts(m, " Aligned,"); 1323 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1324 seq_puts(m, " Partition Aligned,"); 1325 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1326 seq_puts(m, " SSD,"); 1327 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1328 seq_puts(m, " TRIM-support,"); 1329 1330 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1331 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1332 if (tcon->perf_sector_size) 1333 seq_printf(m, "\tOptimal sector size: 0x%x", 1334 tcon->perf_sector_size); 1335 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1336 } 1337 1338 static void 1339 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1340 { 1341 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1342 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1343 1344 /* 1345 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1346 * totals (requests sent) since those SMBs are per-session not per tcon 1347 */ 1348 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1349 (long long)(tcon->bytes_read), 1350 (long long)(tcon->bytes_written)); 1351 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1352 atomic_read(&tcon->num_local_opens), 1353 atomic_read(&tcon->num_remote_opens)); 1354 seq_printf(m, "\nTreeConnects: %d total %d failed", 1355 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1356 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1357 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1358 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1359 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1360 seq_printf(m, "\nCreates: %d total %d failed", 1361 atomic_read(&sent[SMB2_CREATE_HE]), 1362 atomic_read(&failed[SMB2_CREATE_HE])); 1363 seq_printf(m, "\nCloses: %d total %d failed", 1364 atomic_read(&sent[SMB2_CLOSE_HE]), 1365 atomic_read(&failed[SMB2_CLOSE_HE])); 1366 seq_printf(m, "\nFlushes: %d total %d failed", 1367 atomic_read(&sent[SMB2_FLUSH_HE]), 1368 atomic_read(&failed[SMB2_FLUSH_HE])); 1369 seq_printf(m, "\nReads: %d total %d failed", 1370 atomic_read(&sent[SMB2_READ_HE]), 1371 atomic_read(&failed[SMB2_READ_HE])); 1372 seq_printf(m, "\nWrites: %d total %d failed", 1373 atomic_read(&sent[SMB2_WRITE_HE]), 1374 atomic_read(&failed[SMB2_WRITE_HE])); 1375 seq_printf(m, "\nLocks: %d total %d failed", 1376 atomic_read(&sent[SMB2_LOCK_HE]), 1377 atomic_read(&failed[SMB2_LOCK_HE])); 1378 seq_printf(m, "\nIOCTLs: %d total %d failed", 1379 atomic_read(&sent[SMB2_IOCTL_HE]), 1380 atomic_read(&failed[SMB2_IOCTL_HE])); 1381 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1382 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1383 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1384 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1385 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1386 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1387 seq_printf(m, "\nQueryInfos: %d total %d failed", 1388 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1389 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1390 seq_printf(m, "\nSetInfos: %d total %d failed", 1391 atomic_read(&sent[SMB2_SET_INFO_HE]), 1392 atomic_read(&failed[SMB2_SET_INFO_HE])); 1393 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1394 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1395 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1396 } 1397 1398 static void 1399 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1400 { 1401 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1402 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1403 1404 cfile->fid.persistent_fid = fid->persistent_fid; 1405 cfile->fid.volatile_fid = fid->volatile_fid; 1406 cfile->fid.access = fid->access; 1407 #ifdef CONFIG_CIFS_DEBUG2 1408 cfile->fid.mid = fid->mid; 1409 #endif /* CIFS_DEBUG2 */ 1410 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1411 &fid->purge_cache); 1412 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1413 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1414 } 1415 1416 static int 1417 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1418 struct cifs_fid *fid) 1419 { 1420 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1421 } 1422 1423 static int 1424 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1425 struct cifsFileInfo *cfile) 1426 { 1427 struct smb2_file_network_open_info file_inf; 1428 struct inode *inode; 1429 int rc; 1430 1431 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1432 cfile->fid.volatile_fid, &file_inf); 1433 if (rc) 1434 return rc; 1435 1436 inode = d_inode(cfile->dentry); 1437 1438 spin_lock(&inode->i_lock); 1439 CIFS_I(inode)->time = jiffies; 1440 1441 /* Creation time should not need to be updated on close */ 1442 if (file_inf.LastWriteTime) 1443 inode_set_mtime_to_ts(inode, 1444 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1445 if (file_inf.ChangeTime) 1446 inode_set_ctime_to_ts(inode, 1447 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1448 if (file_inf.LastAccessTime) 1449 inode_set_atime_to_ts(inode, 1450 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1451 1452 /* 1453 * i_blocks is not related to (i_size / i_blksize), 1454 * but instead 512 byte (2**9) size is required for 1455 * calculating num blocks. 1456 */ 1457 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1458 inode->i_blocks = 1459 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1460 1461 /* End of file and Attributes should not have to be updated on close */ 1462 spin_unlock(&inode->i_lock); 1463 return rc; 1464 } 1465 1466 static int 1467 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1468 u64 persistent_fid, u64 volatile_fid, 1469 struct copychunk_ioctl *pcchunk) 1470 { 1471 int rc; 1472 unsigned int ret_data_len; 1473 struct resume_key_req *res_key; 1474 1475 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1476 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1477 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1478 1479 if (rc == -EOPNOTSUPP) { 1480 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1481 goto req_res_key_exit; 1482 } else if (rc) { 1483 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1484 goto req_res_key_exit; 1485 } 1486 if (ret_data_len < sizeof(struct resume_key_req)) { 1487 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1488 rc = -EINVAL; 1489 goto req_res_key_exit; 1490 } 1491 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1492 1493 req_res_key_exit: 1494 kfree(res_key); 1495 return rc; 1496 } 1497 1498 static int 1499 smb2_ioctl_query_info(const unsigned int xid, 1500 struct cifs_tcon *tcon, 1501 struct cifs_sb_info *cifs_sb, 1502 __le16 *path, int is_dir, 1503 unsigned long p) 1504 { 1505 struct smb2_compound_vars *vars; 1506 struct smb_rqst *rqst; 1507 struct kvec *rsp_iov; 1508 struct cifs_ses *ses = tcon->ses; 1509 struct TCP_Server_Info *server; 1510 char __user *arg = (char __user *)p; 1511 struct smb_query_info qi; 1512 struct smb_query_info __user *pqi; 1513 int rc = 0; 1514 int flags = CIFS_CP_CREATE_CLOSE_OP; 1515 struct smb2_query_info_rsp *qi_rsp = NULL; 1516 struct smb2_ioctl_rsp *io_rsp = NULL; 1517 void *buffer = NULL; 1518 int resp_buftype[3]; 1519 struct cifs_open_parms oparms; 1520 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1521 struct cifs_fid fid; 1522 unsigned int size[2]; 1523 void *data[2]; 1524 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1525 void (*free_req1_func)(struct smb_rqst *r); 1526 int retries = 0, cur_sleep = 1; 1527 1528 replay_again: 1529 /* reinitialize for possible replay */ 1530 flags = CIFS_CP_CREATE_CLOSE_OP; 1531 oplock = SMB2_OPLOCK_LEVEL_NONE; 1532 server = cifs_pick_channel(ses); 1533 1534 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1535 if (vars == NULL) 1536 return -ENOMEM; 1537 rqst = &vars->rqst[0]; 1538 rsp_iov = &vars->rsp_iov[0]; 1539 1540 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1541 1542 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1543 rc = -EFAULT; 1544 goto free_vars; 1545 } 1546 if (qi.output_buffer_length > 1024) { 1547 rc = -EINVAL; 1548 goto free_vars; 1549 } 1550 1551 if (!ses || !server) { 1552 rc = -EIO; 1553 goto free_vars; 1554 } 1555 1556 if (smb3_encryption_required(tcon)) 1557 flags |= CIFS_TRANSFORM_REQ; 1558 1559 if (qi.output_buffer_length) { 1560 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1561 if (IS_ERR(buffer)) { 1562 rc = PTR_ERR(buffer); 1563 goto free_vars; 1564 } 1565 } 1566 1567 /* Open */ 1568 rqst[0].rq_iov = &vars->open_iov[0]; 1569 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1570 1571 oparms = (struct cifs_open_parms) { 1572 .tcon = tcon, 1573 .disposition = FILE_OPEN, 1574 .create_options = cifs_create_options(cifs_sb, create_options), 1575 .fid = &fid, 1576 .replay = !!(retries), 1577 }; 1578 1579 if (qi.flags & PASSTHRU_FSCTL) { 1580 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1581 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1582 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1583 break; 1584 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1585 oparms.desired_access = GENERIC_ALL; 1586 break; 1587 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1588 oparms.desired_access = GENERIC_READ; 1589 break; 1590 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1591 oparms.desired_access = GENERIC_WRITE; 1592 break; 1593 } 1594 } else if (qi.flags & PASSTHRU_SET_INFO) { 1595 oparms.desired_access = GENERIC_WRITE; 1596 } else { 1597 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1598 } 1599 1600 rc = SMB2_open_init(tcon, server, 1601 &rqst[0], &oplock, &oparms, path); 1602 if (rc) 1603 goto free_output_buffer; 1604 smb2_set_next_command(tcon, &rqst[0]); 1605 1606 /* Query */ 1607 if (qi.flags & PASSTHRU_FSCTL) { 1608 /* Can eventually relax perm check since server enforces too */ 1609 if (!capable(CAP_SYS_ADMIN)) { 1610 rc = -EPERM; 1611 goto free_open_req; 1612 } 1613 rqst[1].rq_iov = &vars->io_iov[0]; 1614 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1615 1616 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1617 qi.info_type, buffer, qi.output_buffer_length, 1618 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1619 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1620 free_req1_func = SMB2_ioctl_free; 1621 } else if (qi.flags == PASSTHRU_SET_INFO) { 1622 /* Can eventually relax perm check since server enforces too */ 1623 if (!capable(CAP_SYS_ADMIN)) { 1624 rc = -EPERM; 1625 goto free_open_req; 1626 } 1627 if (qi.output_buffer_length < 8) { 1628 rc = -EINVAL; 1629 goto free_open_req; 1630 } 1631 rqst[1].rq_iov = vars->si_iov; 1632 rqst[1].rq_nvec = 1; 1633 1634 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1635 size[0] = 8; 1636 data[0] = buffer; 1637 1638 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1639 current->tgid, FILE_END_OF_FILE_INFORMATION, 1640 SMB2_O_INFO_FILE, 0, data, size); 1641 free_req1_func = SMB2_set_info_free; 1642 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1643 rqst[1].rq_iov = &vars->qi_iov; 1644 rqst[1].rq_nvec = 1; 1645 1646 rc = SMB2_query_info_init(tcon, server, 1647 &rqst[1], COMPOUND_FID, 1648 COMPOUND_FID, qi.file_info_class, 1649 qi.info_type, qi.additional_information, 1650 qi.input_buffer_length, 1651 qi.output_buffer_length, buffer); 1652 free_req1_func = SMB2_query_info_free; 1653 } else { /* unknown flags */ 1654 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1655 qi.flags); 1656 rc = -EINVAL; 1657 } 1658 1659 if (rc) 1660 goto free_open_req; 1661 smb2_set_next_command(tcon, &rqst[1]); 1662 smb2_set_related(&rqst[1]); 1663 1664 /* Close */ 1665 rqst[2].rq_iov = &vars->close_iov; 1666 rqst[2].rq_nvec = 1; 1667 1668 rc = SMB2_close_init(tcon, server, 1669 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1670 if (rc) 1671 goto free_req_1; 1672 smb2_set_related(&rqst[2]); 1673 1674 if (retries) { 1675 smb2_set_replay(server, &rqst[0]); 1676 smb2_set_replay(server, &rqst[1]); 1677 smb2_set_replay(server, &rqst[2]); 1678 } 1679 1680 rc = compound_send_recv(xid, ses, server, 1681 flags, 3, rqst, 1682 resp_buftype, rsp_iov); 1683 if (rc) 1684 goto out; 1685 1686 /* No need to bump num_remote_opens since handle immediately closed */ 1687 if (qi.flags & PASSTHRU_FSCTL) { 1688 pqi = (struct smb_query_info __user *)arg; 1689 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1690 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1691 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1692 if (qi.input_buffer_length > 0 && 1693 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1694 > rsp_iov[1].iov_len) { 1695 rc = -EFAULT; 1696 goto out; 1697 } 1698 1699 if (copy_to_user(&pqi->input_buffer_length, 1700 &qi.input_buffer_length, 1701 sizeof(qi.input_buffer_length))) { 1702 rc = -EFAULT; 1703 goto out; 1704 } 1705 1706 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1707 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1708 qi.input_buffer_length)) 1709 rc = -EFAULT; 1710 } else { 1711 pqi = (struct smb_query_info __user *)arg; 1712 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1713 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1714 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1715 if (copy_to_user(&pqi->input_buffer_length, 1716 &qi.input_buffer_length, 1717 sizeof(qi.input_buffer_length))) { 1718 rc = -EFAULT; 1719 goto out; 1720 } 1721 1722 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1723 qi.input_buffer_length)) 1724 rc = -EFAULT; 1725 } 1726 1727 out: 1728 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1729 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1730 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1731 SMB2_close_free(&rqst[2]); 1732 free_req_1: 1733 free_req1_func(&rqst[1]); 1734 free_open_req: 1735 SMB2_open_free(&rqst[0]); 1736 free_output_buffer: 1737 kfree(buffer); 1738 free_vars: 1739 kfree(vars); 1740 1741 if (is_replayable_error(rc) && 1742 smb2_should_replay(tcon, &retries, &cur_sleep)) 1743 goto replay_again; 1744 1745 return rc; 1746 } 1747 1748 static ssize_t 1749 smb2_copychunk_range(const unsigned int xid, 1750 struct cifsFileInfo *srcfile, 1751 struct cifsFileInfo *trgtfile, u64 src_off, 1752 u64 len, u64 dest_off) 1753 { 1754 int rc; 1755 unsigned int ret_data_len; 1756 struct copychunk_ioctl *pcchunk; 1757 struct copychunk_ioctl_rsp *retbuf = NULL; 1758 struct cifs_tcon *tcon; 1759 int chunks_copied = 0; 1760 bool chunk_sizes_updated = false; 1761 ssize_t bytes_written, total_bytes_written = 0; 1762 1763 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1764 if (pcchunk == NULL) 1765 return -ENOMEM; 1766 1767 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1768 /* Request a key from the server to identify the source of the copy */ 1769 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1770 srcfile->fid.persistent_fid, 1771 srcfile->fid.volatile_fid, pcchunk); 1772 1773 /* Note: request_res_key sets res_key null only if rc !=0 */ 1774 if (rc) 1775 goto cchunk_out; 1776 1777 /* For now array only one chunk long, will make more flexible later */ 1778 pcchunk->ChunkCount = cpu_to_le32(1); 1779 pcchunk->Reserved = 0; 1780 pcchunk->Reserved2 = 0; 1781 1782 tcon = tlink_tcon(trgtfile->tlink); 1783 1784 while (len > 0) { 1785 pcchunk->SourceOffset = cpu_to_le64(src_off); 1786 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1787 pcchunk->Length = 1788 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1789 1790 /* Request server copy to target from src identified by key */ 1791 kfree(retbuf); 1792 retbuf = NULL; 1793 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1794 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1795 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1796 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1797 if (rc == 0) { 1798 if (ret_data_len != 1799 sizeof(struct copychunk_ioctl_rsp)) { 1800 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1801 rc = -EIO; 1802 goto cchunk_out; 1803 } 1804 if (retbuf->TotalBytesWritten == 0) { 1805 cifs_dbg(FYI, "no bytes copied\n"); 1806 rc = -EIO; 1807 goto cchunk_out; 1808 } 1809 /* 1810 * Check if server claimed to write more than we asked 1811 */ 1812 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1813 le32_to_cpu(pcchunk->Length)) { 1814 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1815 rc = -EIO; 1816 goto cchunk_out; 1817 } 1818 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1819 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1820 rc = -EIO; 1821 goto cchunk_out; 1822 } 1823 chunks_copied++; 1824 1825 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1826 src_off += bytes_written; 1827 dest_off += bytes_written; 1828 len -= bytes_written; 1829 total_bytes_written += bytes_written; 1830 1831 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1832 le32_to_cpu(retbuf->ChunksWritten), 1833 le32_to_cpu(retbuf->ChunkBytesWritten), 1834 bytes_written); 1835 } else if (rc == -EINVAL) { 1836 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1837 goto cchunk_out; 1838 1839 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1840 le32_to_cpu(retbuf->ChunksWritten), 1841 le32_to_cpu(retbuf->ChunkBytesWritten), 1842 le32_to_cpu(retbuf->TotalBytesWritten)); 1843 1844 /* 1845 * Check if this is the first request using these sizes, 1846 * (ie check if copy succeed once with original sizes 1847 * and check if the server gave us different sizes after 1848 * we already updated max sizes on previous request). 1849 * if not then why is the server returning an error now 1850 */ 1851 if ((chunks_copied != 0) || chunk_sizes_updated) 1852 goto cchunk_out; 1853 1854 /* Check that server is not asking us to grow size */ 1855 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1856 tcon->max_bytes_chunk) 1857 tcon->max_bytes_chunk = 1858 le32_to_cpu(retbuf->ChunkBytesWritten); 1859 else 1860 goto cchunk_out; /* server gave us bogus size */ 1861 1862 /* No need to change MaxChunks since already set to 1 */ 1863 chunk_sizes_updated = true; 1864 } else 1865 goto cchunk_out; 1866 } 1867 1868 cchunk_out: 1869 kfree(pcchunk); 1870 kfree(retbuf); 1871 if (rc) 1872 return rc; 1873 else 1874 return total_bytes_written; 1875 } 1876 1877 static int 1878 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1879 struct cifs_fid *fid) 1880 { 1881 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1882 } 1883 1884 static unsigned int 1885 smb2_read_data_offset(char *buf) 1886 { 1887 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1888 1889 return rsp->DataOffset; 1890 } 1891 1892 static unsigned int 1893 smb2_read_data_length(char *buf, bool in_remaining) 1894 { 1895 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1896 1897 if (in_remaining) 1898 return le32_to_cpu(rsp->DataRemaining); 1899 1900 return le32_to_cpu(rsp->DataLength); 1901 } 1902 1903 1904 static int 1905 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1906 struct cifs_io_parms *parms, unsigned int *bytes_read, 1907 char **buf, int *buf_type) 1908 { 1909 parms->persistent_fid = pfid->persistent_fid; 1910 parms->volatile_fid = pfid->volatile_fid; 1911 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1912 } 1913 1914 static int 1915 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1916 struct cifs_io_parms *parms, unsigned int *written, 1917 struct kvec *iov, unsigned long nr_segs) 1918 { 1919 1920 parms->persistent_fid = pfid->persistent_fid; 1921 parms->volatile_fid = pfid->volatile_fid; 1922 return SMB2_write(xid, parms, written, iov, nr_segs); 1923 } 1924 1925 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1926 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1927 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1928 { 1929 struct cifsInodeInfo *cifsi; 1930 int rc; 1931 1932 cifsi = CIFS_I(inode); 1933 1934 /* if file already sparse don't bother setting sparse again */ 1935 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1936 return true; /* already sparse */ 1937 1938 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1939 return true; /* already not sparse */ 1940 1941 /* 1942 * Can't check for sparse support on share the usual way via the 1943 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1944 * since Samba server doesn't set the flag on the share, yet 1945 * supports the set sparse FSCTL and returns sparse correctly 1946 * in the file attributes. If we fail setting sparse though we 1947 * mark that server does not support sparse files for this share 1948 * to avoid repeatedly sending the unsupported fsctl to server 1949 * if the file is repeatedly extended. 1950 */ 1951 if (tcon->broken_sparse_sup) 1952 return false; 1953 1954 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1955 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1956 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1957 if (rc) { 1958 tcon->broken_sparse_sup = true; 1959 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1960 return false; 1961 } 1962 1963 if (setsparse) 1964 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1965 else 1966 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1967 1968 return true; 1969 } 1970 1971 static int 1972 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1973 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1974 { 1975 struct inode *inode; 1976 1977 /* 1978 * If extending file more than one page make sparse. Many Linux fs 1979 * make files sparse by default when extending via ftruncate 1980 */ 1981 inode = d_inode(cfile->dentry); 1982 1983 if (!set_alloc && (size > inode->i_size + 8192)) { 1984 __u8 set_sparse = 1; 1985 1986 /* whether set sparse succeeds or not, extend the file */ 1987 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1988 } 1989 1990 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1991 cfile->fid.volatile_fid, cfile->pid, size); 1992 } 1993 1994 static int 1995 smb2_duplicate_extents(const unsigned int xid, 1996 struct cifsFileInfo *srcfile, 1997 struct cifsFileInfo *trgtfile, u64 src_off, 1998 u64 len, u64 dest_off) 1999 { 2000 int rc; 2001 unsigned int ret_data_len; 2002 struct inode *inode; 2003 struct duplicate_extents_to_file dup_ext_buf; 2004 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2005 2006 /* server fileays advertise duplicate extent support with this flag */ 2007 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2008 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2009 return -EOPNOTSUPP; 2010 2011 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2012 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2013 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2014 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2015 dup_ext_buf.ByteCount = cpu_to_le64(len); 2016 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2017 src_off, dest_off, len); 2018 2019 inode = d_inode(trgtfile->dentry); 2020 if (inode->i_size < dest_off + len) { 2021 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2022 if (rc) 2023 goto duplicate_extents_out; 2024 2025 /* 2026 * Although also could set plausible allocation size (i_blocks) 2027 * here in addition to setting the file size, in reflink 2028 * it is likely that the target file is sparse. Its allocation 2029 * size will be queried on next revalidate, but it is important 2030 * to make sure that file's cached size is updated immediately 2031 */ 2032 cifs_setsize(inode, dest_off + len); 2033 } 2034 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 2035 trgtfile->fid.volatile_fid, 2036 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 2037 (char *)&dup_ext_buf, 2038 sizeof(struct duplicate_extents_to_file), 2039 CIFSMaxBufSize, NULL, 2040 &ret_data_len); 2041 2042 if (ret_data_len > 0) 2043 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 2044 2045 duplicate_extents_out: 2046 return rc; 2047 } 2048 2049 static int 2050 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2051 struct cifsFileInfo *cfile) 2052 { 2053 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2054 cfile->fid.volatile_fid); 2055 } 2056 2057 static int 2058 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2059 struct cifsFileInfo *cfile) 2060 { 2061 struct fsctl_set_integrity_information_req integr_info; 2062 unsigned int ret_data_len; 2063 2064 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2065 integr_info.Flags = 0; 2066 integr_info.Reserved = 0; 2067 2068 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2069 cfile->fid.volatile_fid, 2070 FSCTL_SET_INTEGRITY_INFORMATION, 2071 (char *)&integr_info, 2072 sizeof(struct fsctl_set_integrity_information_req), 2073 CIFSMaxBufSize, NULL, 2074 &ret_data_len); 2075 2076 } 2077 2078 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2079 #define GMT_TOKEN_SIZE 50 2080 2081 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2082 2083 /* 2084 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2085 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2086 */ 2087 static int 2088 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2089 struct cifsFileInfo *cfile, void __user *ioc_buf) 2090 { 2091 char *retbuf = NULL; 2092 unsigned int ret_data_len = 0; 2093 int rc; 2094 u32 max_response_size; 2095 struct smb_snapshot_array snapshot_in; 2096 2097 /* 2098 * On the first query to enumerate the list of snapshots available 2099 * for this volume the buffer begins with 0 (number of snapshots 2100 * which can be returned is zero since at that point we do not know 2101 * how big the buffer needs to be). On the second query, 2102 * it (ret_data_len) is set to number of snapshots so we can 2103 * know to set the maximum response size larger (see below). 2104 */ 2105 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2106 return -EFAULT; 2107 2108 /* 2109 * Note that for snapshot queries that servers like Azure expect that 2110 * the first query be minimal size (and just used to get the number/size 2111 * of previous versions) so response size must be specified as EXACTLY 2112 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2113 * of eight bytes. 2114 */ 2115 if (ret_data_len == 0) 2116 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2117 else 2118 max_response_size = CIFSMaxBufSize; 2119 2120 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2121 cfile->fid.volatile_fid, 2122 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2123 NULL, 0 /* no input data */, max_response_size, 2124 (char **)&retbuf, 2125 &ret_data_len); 2126 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2127 rc, ret_data_len); 2128 if (rc) 2129 return rc; 2130 2131 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2132 /* Fixup buffer */ 2133 if (copy_from_user(&snapshot_in, ioc_buf, 2134 sizeof(struct smb_snapshot_array))) { 2135 rc = -EFAULT; 2136 kfree(retbuf); 2137 return rc; 2138 } 2139 2140 /* 2141 * Check for min size, ie not large enough to fit even one GMT 2142 * token (snapshot). On the first ioctl some users may pass in 2143 * smaller size (or zero) to simply get the size of the array 2144 * so the user space caller can allocate sufficient memory 2145 * and retry the ioctl again with larger array size sufficient 2146 * to hold all of the snapshot GMT tokens on the second try. 2147 */ 2148 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2149 ret_data_len = sizeof(struct smb_snapshot_array); 2150 2151 /* 2152 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2153 * the snapshot array (of 50 byte GMT tokens) each 2154 * representing an available previous version of the data 2155 */ 2156 if (ret_data_len > (snapshot_in.snapshot_array_size + 2157 sizeof(struct smb_snapshot_array))) 2158 ret_data_len = snapshot_in.snapshot_array_size + 2159 sizeof(struct smb_snapshot_array); 2160 2161 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2162 rc = -EFAULT; 2163 } 2164 2165 kfree(retbuf); 2166 return rc; 2167 } 2168 2169 2170 2171 static int 2172 smb3_notify(const unsigned int xid, struct file *pfile, 2173 void __user *ioc_buf, bool return_changes) 2174 { 2175 struct smb3_notify_info notify; 2176 struct smb3_notify_info __user *pnotify_buf; 2177 struct dentry *dentry = pfile->f_path.dentry; 2178 struct inode *inode = file_inode(pfile); 2179 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2180 struct cifs_open_parms oparms; 2181 struct cifs_fid fid; 2182 struct cifs_tcon *tcon; 2183 const unsigned char *path; 2184 char *returned_ioctl_info = NULL; 2185 void *page = alloc_dentry_path(); 2186 __le16 *utf16_path = NULL; 2187 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2188 int rc = 0; 2189 __u32 ret_len = 0; 2190 2191 path = build_path_from_dentry(dentry, page); 2192 if (IS_ERR(path)) { 2193 rc = PTR_ERR(path); 2194 goto notify_exit; 2195 } 2196 2197 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2198 if (utf16_path == NULL) { 2199 rc = -ENOMEM; 2200 goto notify_exit; 2201 } 2202 2203 if (return_changes) { 2204 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2205 rc = -EFAULT; 2206 goto notify_exit; 2207 } 2208 } else { 2209 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2210 rc = -EFAULT; 2211 goto notify_exit; 2212 } 2213 notify.data_len = 0; 2214 } 2215 2216 tcon = cifs_sb_master_tcon(cifs_sb); 2217 oparms = (struct cifs_open_parms) { 2218 .tcon = tcon, 2219 .path = path, 2220 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2221 .disposition = FILE_OPEN, 2222 .create_options = cifs_create_options(cifs_sb, 0), 2223 .fid = &fid, 2224 }; 2225 2226 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2227 NULL); 2228 if (rc) 2229 goto notify_exit; 2230 2231 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2232 notify.watch_tree, notify.completion_filter, 2233 notify.data_len, &returned_ioctl_info, &ret_len); 2234 2235 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2236 2237 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2238 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2239 if (ret_len > notify.data_len) 2240 ret_len = notify.data_len; 2241 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2242 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2243 rc = -EFAULT; 2244 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2245 rc = -EFAULT; 2246 } 2247 kfree(returned_ioctl_info); 2248 notify_exit: 2249 free_dentry_path(page); 2250 kfree(utf16_path); 2251 return rc; 2252 } 2253 2254 static int 2255 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2256 const char *path, struct cifs_sb_info *cifs_sb, 2257 struct cifs_fid *fid, __u16 search_flags, 2258 struct cifs_search_info *srch_inf) 2259 { 2260 __le16 *utf16_path; 2261 struct smb_rqst rqst[2]; 2262 struct kvec rsp_iov[2]; 2263 int resp_buftype[2]; 2264 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2265 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2266 int rc, flags = 0; 2267 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2268 struct cifs_open_parms oparms; 2269 struct smb2_query_directory_rsp *qd_rsp = NULL; 2270 struct smb2_create_rsp *op_rsp = NULL; 2271 struct TCP_Server_Info *server; 2272 int retries = 0, cur_sleep = 1; 2273 2274 replay_again: 2275 /* reinitialize for possible replay */ 2276 flags = 0; 2277 oplock = SMB2_OPLOCK_LEVEL_NONE; 2278 server = cifs_pick_channel(tcon->ses); 2279 2280 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2281 if (!utf16_path) 2282 return -ENOMEM; 2283 2284 if (smb3_encryption_required(tcon)) 2285 flags |= CIFS_TRANSFORM_REQ; 2286 2287 memset(rqst, 0, sizeof(rqst)); 2288 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2289 memset(rsp_iov, 0, sizeof(rsp_iov)); 2290 2291 /* Open */ 2292 memset(&open_iov, 0, sizeof(open_iov)); 2293 rqst[0].rq_iov = open_iov; 2294 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2295 2296 oparms = (struct cifs_open_parms) { 2297 .tcon = tcon, 2298 .path = path, 2299 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2300 .disposition = FILE_OPEN, 2301 .create_options = cifs_create_options(cifs_sb, 0), 2302 .fid = fid, 2303 .replay = !!(retries), 2304 }; 2305 2306 rc = SMB2_open_init(tcon, server, 2307 &rqst[0], &oplock, &oparms, utf16_path); 2308 if (rc) 2309 goto qdf_free; 2310 smb2_set_next_command(tcon, &rqst[0]); 2311 2312 /* Query directory */ 2313 srch_inf->entries_in_buffer = 0; 2314 srch_inf->index_of_last_entry = 2; 2315 2316 memset(&qd_iov, 0, sizeof(qd_iov)); 2317 rqst[1].rq_iov = qd_iov; 2318 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2319 2320 rc = SMB2_query_directory_init(xid, tcon, server, 2321 &rqst[1], 2322 COMPOUND_FID, COMPOUND_FID, 2323 0, srch_inf->info_level); 2324 if (rc) 2325 goto qdf_free; 2326 2327 smb2_set_related(&rqst[1]); 2328 2329 if (retries) { 2330 smb2_set_replay(server, &rqst[0]); 2331 smb2_set_replay(server, &rqst[1]); 2332 } 2333 2334 rc = compound_send_recv(xid, tcon->ses, server, 2335 flags, 2, rqst, 2336 resp_buftype, rsp_iov); 2337 2338 /* If the open failed there is nothing to do */ 2339 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2340 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2341 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2342 goto qdf_free; 2343 } 2344 fid->persistent_fid = op_rsp->PersistentFileId; 2345 fid->volatile_fid = op_rsp->VolatileFileId; 2346 2347 /* Anything else than ENODATA means a genuine error */ 2348 if (rc && rc != -ENODATA) { 2349 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2350 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2351 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2352 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2353 goto qdf_free; 2354 } 2355 2356 atomic_inc(&tcon->num_remote_opens); 2357 2358 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2359 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2360 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2361 tcon->tid, tcon->ses->Suid, 0, 0); 2362 srch_inf->endOfSearch = true; 2363 rc = 0; 2364 goto qdf_free; 2365 } 2366 2367 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2368 srch_inf); 2369 if (rc) { 2370 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2371 tcon->ses->Suid, 0, 0, rc); 2372 goto qdf_free; 2373 } 2374 resp_buftype[1] = CIFS_NO_BUFFER; 2375 2376 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2377 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2378 2379 qdf_free: 2380 kfree(utf16_path); 2381 SMB2_open_free(&rqst[0]); 2382 SMB2_query_directory_free(&rqst[1]); 2383 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2384 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2385 2386 if (is_replayable_error(rc) && 2387 smb2_should_replay(tcon, &retries, &cur_sleep)) 2388 goto replay_again; 2389 2390 return rc; 2391 } 2392 2393 static int 2394 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2395 struct cifs_fid *fid, __u16 search_flags, 2396 struct cifs_search_info *srch_inf) 2397 { 2398 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2399 fid->volatile_fid, 0, srch_inf); 2400 } 2401 2402 static int 2403 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2404 struct cifs_fid *fid) 2405 { 2406 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2407 } 2408 2409 /* 2410 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2411 * the number of credits and return true. Otherwise - return false. 2412 */ 2413 static bool 2414 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2415 { 2416 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2417 int scredits, in_flight; 2418 2419 if (shdr->Status != STATUS_PENDING) 2420 return false; 2421 2422 if (shdr->CreditRequest) { 2423 spin_lock(&server->req_lock); 2424 server->credits += le16_to_cpu(shdr->CreditRequest); 2425 scredits = server->credits; 2426 in_flight = server->in_flight; 2427 spin_unlock(&server->req_lock); 2428 wake_up(&server->request_q); 2429 2430 trace_smb3_pend_credits(server->CurrentMid, 2431 server->conn_id, server->hostname, scredits, 2432 le16_to_cpu(shdr->CreditRequest), in_flight); 2433 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2434 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2435 } 2436 2437 return true; 2438 } 2439 2440 static bool 2441 smb2_is_session_expired(char *buf) 2442 { 2443 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2444 2445 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2446 shdr->Status != STATUS_USER_SESSION_DELETED) 2447 return false; 2448 2449 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2450 le64_to_cpu(shdr->SessionId), 2451 le16_to_cpu(shdr->Command), 2452 le64_to_cpu(shdr->MessageId)); 2453 cifs_dbg(FYI, "Session expired or deleted\n"); 2454 2455 return true; 2456 } 2457 2458 static bool 2459 smb2_is_status_io_timeout(char *buf) 2460 { 2461 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2462 2463 if (shdr->Status == STATUS_IO_TIMEOUT) 2464 return true; 2465 else 2466 return false; 2467 } 2468 2469 static bool 2470 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2471 { 2472 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2473 struct TCP_Server_Info *pserver; 2474 struct cifs_ses *ses; 2475 struct cifs_tcon *tcon; 2476 2477 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2478 return false; 2479 2480 /* If server is a channel, select the primary channel */ 2481 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2482 2483 spin_lock(&cifs_tcp_ses_lock); 2484 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2485 if (cifs_ses_exiting(ses)) 2486 continue; 2487 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2488 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2489 spin_lock(&tcon->tc_lock); 2490 tcon->need_reconnect = true; 2491 spin_unlock(&tcon->tc_lock); 2492 spin_unlock(&cifs_tcp_ses_lock); 2493 pr_warn_once("Server share %s deleted.\n", 2494 tcon->tree_name); 2495 return true; 2496 } 2497 } 2498 } 2499 spin_unlock(&cifs_tcp_ses_lock); 2500 2501 return false; 2502 } 2503 2504 static int 2505 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2506 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2507 { 2508 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2509 return SMB2_lease_break(0, tcon, cinode->lease_key, 2510 smb2_get_lease_state(cinode)); 2511 2512 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2513 CIFS_CACHE_READ(cinode) ? 1 : 0); 2514 } 2515 2516 void 2517 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) 2518 { 2519 struct smb2_hdr *shdr; 2520 2521 if (server->dialect < SMB30_PROT_ID) 2522 return; 2523 2524 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2525 if (shdr == NULL) { 2526 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2527 return; 2528 } 2529 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; 2530 } 2531 2532 void 2533 smb2_set_related(struct smb_rqst *rqst) 2534 { 2535 struct smb2_hdr *shdr; 2536 2537 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2538 if (shdr == NULL) { 2539 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2540 return; 2541 } 2542 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2543 } 2544 2545 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2546 2547 void 2548 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2549 { 2550 struct smb2_hdr *shdr; 2551 struct cifs_ses *ses = tcon->ses; 2552 struct TCP_Server_Info *server = ses->server; 2553 unsigned long len = smb_rqst_len(server, rqst); 2554 int i, num_padding; 2555 2556 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2557 if (shdr == NULL) { 2558 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2559 return; 2560 } 2561 2562 /* SMB headers in a compound are 8 byte aligned. */ 2563 2564 /* No padding needed */ 2565 if (!(len & 7)) 2566 goto finished; 2567 2568 num_padding = 8 - (len & 7); 2569 if (!smb3_encryption_required(tcon)) { 2570 /* 2571 * If we do not have encryption then we can just add an extra 2572 * iov for the padding. 2573 */ 2574 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2575 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2576 rqst->rq_nvec++; 2577 len += num_padding; 2578 } else { 2579 /* 2580 * We can not add a small padding iov for the encryption case 2581 * because the encryption framework can not handle the padding 2582 * iovs. 2583 * We have to flatten this into a single buffer and add 2584 * the padding to it. 2585 */ 2586 for (i = 1; i < rqst->rq_nvec; i++) { 2587 memcpy(rqst->rq_iov[0].iov_base + 2588 rqst->rq_iov[0].iov_len, 2589 rqst->rq_iov[i].iov_base, 2590 rqst->rq_iov[i].iov_len); 2591 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2592 } 2593 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2594 0, num_padding); 2595 rqst->rq_iov[0].iov_len += num_padding; 2596 len += num_padding; 2597 rqst->rq_nvec = 1; 2598 } 2599 2600 finished: 2601 shdr->NextCommand = cpu_to_le32(len); 2602 } 2603 2604 /* 2605 * helper function for exponential backoff and check if replayable 2606 */ 2607 bool smb2_should_replay(struct cifs_tcon *tcon, 2608 int *pretries, 2609 int *pcur_sleep) 2610 { 2611 if (!pretries || !pcur_sleep) 2612 return false; 2613 2614 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { 2615 msleep(*pcur_sleep); 2616 (*pcur_sleep) = ((*pcur_sleep) << 1); 2617 if ((*pcur_sleep) > CIFS_MAX_SLEEP) 2618 (*pcur_sleep) = CIFS_MAX_SLEEP; 2619 return true; 2620 } 2621 2622 return false; 2623 } 2624 2625 /* 2626 * Passes the query info response back to the caller on success. 2627 * Caller need to free this with free_rsp_buf(). 2628 */ 2629 int 2630 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2631 const char *path, u32 desired_access, 2632 u32 class, u32 type, u32 output_len, 2633 struct kvec *rsp, int *buftype, 2634 struct cifs_sb_info *cifs_sb) 2635 { 2636 struct smb2_compound_vars *vars; 2637 struct cifs_ses *ses = tcon->ses; 2638 struct TCP_Server_Info *server; 2639 int flags = CIFS_CP_CREATE_CLOSE_OP; 2640 struct smb_rqst *rqst; 2641 int resp_buftype[3]; 2642 struct kvec *rsp_iov; 2643 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2644 struct cifs_open_parms oparms; 2645 struct cifs_fid fid; 2646 int rc; 2647 __le16 *utf16_path; 2648 struct cached_fid *cfid = NULL; 2649 int retries = 0, cur_sleep = 1; 2650 2651 replay_again: 2652 /* reinitialize for possible replay */ 2653 flags = CIFS_CP_CREATE_CLOSE_OP; 2654 oplock = SMB2_OPLOCK_LEVEL_NONE; 2655 server = cifs_pick_channel(ses); 2656 2657 if (!path) 2658 path = ""; 2659 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2660 if (!utf16_path) 2661 return -ENOMEM; 2662 2663 if (smb3_encryption_required(tcon)) 2664 flags |= CIFS_TRANSFORM_REQ; 2665 2666 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2667 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2668 if (!vars) { 2669 rc = -ENOMEM; 2670 goto out_free_path; 2671 } 2672 rqst = vars->rqst; 2673 rsp_iov = vars->rsp_iov; 2674 2675 /* 2676 * We can only call this for things we know are directories. 2677 */ 2678 if (!strcmp(path, "")) 2679 open_cached_dir(xid, tcon, path, cifs_sb, false, 2680 &cfid); /* cfid null if open dir failed */ 2681 2682 rqst[0].rq_iov = vars->open_iov; 2683 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2684 2685 oparms = (struct cifs_open_parms) { 2686 .tcon = tcon, 2687 .path = path, 2688 .desired_access = desired_access, 2689 .disposition = FILE_OPEN, 2690 .create_options = cifs_create_options(cifs_sb, 0), 2691 .fid = &fid, 2692 .replay = !!(retries), 2693 }; 2694 2695 rc = SMB2_open_init(tcon, server, 2696 &rqst[0], &oplock, &oparms, utf16_path); 2697 if (rc) 2698 goto qic_exit; 2699 smb2_set_next_command(tcon, &rqst[0]); 2700 2701 rqst[1].rq_iov = &vars->qi_iov; 2702 rqst[1].rq_nvec = 1; 2703 2704 if (cfid) { 2705 rc = SMB2_query_info_init(tcon, server, 2706 &rqst[1], 2707 cfid->fid.persistent_fid, 2708 cfid->fid.volatile_fid, 2709 class, type, 0, 2710 output_len, 0, 2711 NULL); 2712 } else { 2713 rc = SMB2_query_info_init(tcon, server, 2714 &rqst[1], 2715 COMPOUND_FID, 2716 COMPOUND_FID, 2717 class, type, 0, 2718 output_len, 0, 2719 NULL); 2720 } 2721 if (rc) 2722 goto qic_exit; 2723 if (!cfid) { 2724 smb2_set_next_command(tcon, &rqst[1]); 2725 smb2_set_related(&rqst[1]); 2726 } 2727 2728 rqst[2].rq_iov = &vars->close_iov; 2729 rqst[2].rq_nvec = 1; 2730 2731 rc = SMB2_close_init(tcon, server, 2732 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2733 if (rc) 2734 goto qic_exit; 2735 smb2_set_related(&rqst[2]); 2736 2737 if (retries) { 2738 if (!cfid) { 2739 smb2_set_replay(server, &rqst[0]); 2740 smb2_set_replay(server, &rqst[2]); 2741 } 2742 smb2_set_replay(server, &rqst[1]); 2743 } 2744 2745 if (cfid) { 2746 rc = compound_send_recv(xid, ses, server, 2747 flags, 1, &rqst[1], 2748 &resp_buftype[1], &rsp_iov[1]); 2749 } else { 2750 rc = compound_send_recv(xid, ses, server, 2751 flags, 3, rqst, 2752 resp_buftype, rsp_iov); 2753 } 2754 if (rc) { 2755 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2756 if (rc == -EREMCHG) { 2757 tcon->need_reconnect = true; 2758 pr_warn_once("server share %s deleted\n", 2759 tcon->tree_name); 2760 } 2761 goto qic_exit; 2762 } 2763 *rsp = rsp_iov[1]; 2764 *buftype = resp_buftype[1]; 2765 2766 qic_exit: 2767 SMB2_open_free(&rqst[0]); 2768 SMB2_query_info_free(&rqst[1]); 2769 SMB2_close_free(&rqst[2]); 2770 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2771 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2772 if (cfid) 2773 close_cached_dir(cfid); 2774 kfree(vars); 2775 out_free_path: 2776 kfree(utf16_path); 2777 2778 if (is_replayable_error(rc) && 2779 smb2_should_replay(tcon, &retries, &cur_sleep)) 2780 goto replay_again; 2781 2782 return rc; 2783 } 2784 2785 static int 2786 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2787 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2788 { 2789 struct smb2_query_info_rsp *rsp; 2790 struct smb2_fs_full_size_info *info = NULL; 2791 struct kvec rsp_iov = {NULL, 0}; 2792 int buftype = CIFS_NO_BUFFER; 2793 int rc; 2794 2795 2796 rc = smb2_query_info_compound(xid, tcon, path, 2797 FILE_READ_ATTRIBUTES, 2798 FS_FULL_SIZE_INFORMATION, 2799 SMB2_O_INFO_FILESYSTEM, 2800 sizeof(struct smb2_fs_full_size_info), 2801 &rsp_iov, &buftype, cifs_sb); 2802 if (rc) 2803 goto qfs_exit; 2804 2805 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2806 buf->f_type = SMB2_SUPER_MAGIC; 2807 info = (struct smb2_fs_full_size_info *)( 2808 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2809 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2810 le32_to_cpu(rsp->OutputBufferLength), 2811 &rsp_iov, 2812 sizeof(struct smb2_fs_full_size_info)); 2813 if (!rc) 2814 smb2_copy_fs_info_to_kstatfs(info, buf); 2815 2816 qfs_exit: 2817 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2818 free_rsp_buf(buftype, rsp_iov.iov_base); 2819 return rc; 2820 } 2821 2822 static int 2823 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2824 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2825 { 2826 int rc; 2827 __le16 *utf16_path = NULL; 2828 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2829 struct cifs_open_parms oparms; 2830 struct cifs_fid fid; 2831 2832 if (!tcon->posix_extensions) 2833 return smb2_queryfs(xid, tcon, path, cifs_sb, buf); 2834 2835 oparms = (struct cifs_open_parms) { 2836 .tcon = tcon, 2837 .path = path, 2838 .desired_access = FILE_READ_ATTRIBUTES, 2839 .disposition = FILE_OPEN, 2840 .create_options = cifs_create_options(cifs_sb, 0), 2841 .fid = &fid, 2842 }; 2843 2844 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2845 if (utf16_path == NULL) 2846 return -ENOMEM; 2847 2848 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 2849 NULL, NULL); 2850 kfree(utf16_path); 2851 if (rc) 2852 return rc; 2853 2854 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2855 fid.volatile_fid, buf); 2856 buf->f_type = SMB2_SUPER_MAGIC; 2857 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2858 return rc; 2859 } 2860 2861 static bool 2862 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2863 { 2864 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2865 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2866 } 2867 2868 static int 2869 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2870 __u64 length, __u32 type, int lock, int unlock, bool wait) 2871 { 2872 if (unlock && !lock) 2873 type = SMB2_LOCKFLAG_UNLOCK; 2874 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2875 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2876 current->tgid, length, offset, type, wait); 2877 } 2878 2879 static void 2880 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2881 { 2882 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2883 } 2884 2885 static void 2886 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2887 { 2888 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2889 } 2890 2891 static void 2892 smb2_new_lease_key(struct cifs_fid *fid) 2893 { 2894 generate_random_uuid(fid->lease_key); 2895 } 2896 2897 static int 2898 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2899 const char *search_name, 2900 struct dfs_info3_param **target_nodes, 2901 unsigned int *num_of_nodes, 2902 const struct nls_table *nls_codepage, int remap) 2903 { 2904 int rc; 2905 __le16 *utf16_path = NULL; 2906 int utf16_path_len = 0; 2907 struct cifs_tcon *tcon; 2908 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2909 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2910 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2911 int retry_count = 0; 2912 2913 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2914 2915 /* 2916 * Try to use the IPC tcon, otherwise just use any 2917 */ 2918 tcon = ses->tcon_ipc; 2919 if (tcon == NULL) { 2920 spin_lock(&cifs_tcp_ses_lock); 2921 tcon = list_first_entry_or_null(&ses->tcon_list, 2922 struct cifs_tcon, 2923 tcon_list); 2924 if (tcon) { 2925 tcon->tc_count++; 2926 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2927 netfs_trace_tcon_ref_get_dfs_refer); 2928 } 2929 spin_unlock(&cifs_tcp_ses_lock); 2930 } 2931 2932 if (tcon == NULL) { 2933 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2934 ses); 2935 rc = -ENOTCONN; 2936 goto out; 2937 } 2938 2939 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2940 &utf16_path_len, 2941 nls_codepage, remap); 2942 if (!utf16_path) { 2943 rc = -ENOMEM; 2944 goto out; 2945 } 2946 2947 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2948 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2949 if (!dfs_req) { 2950 rc = -ENOMEM; 2951 goto out; 2952 } 2953 2954 /* Highest DFS referral version understood */ 2955 dfs_req->MaxReferralLevel = DFS_VERSION; 2956 2957 /* Path to resolve in an UTF-16 null-terminated string */ 2958 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2959 2960 do { 2961 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2962 FSCTL_DFS_GET_REFERRALS, 2963 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2964 (char **)&dfs_rsp, &dfs_rsp_size); 2965 if (!is_retryable_error(rc)) 2966 break; 2967 usleep_range(512, 2048); 2968 } while (++retry_count < 5); 2969 2970 if (!rc && !dfs_rsp) 2971 rc = -EIO; 2972 if (rc) { 2973 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2974 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2975 goto out; 2976 } 2977 2978 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2979 num_of_nodes, target_nodes, 2980 nls_codepage, remap, search_name, 2981 true /* is_unicode */); 2982 if (rc) { 2983 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2984 goto out; 2985 } 2986 2987 out: 2988 if (tcon && !tcon->ipc) { 2989 /* ipc tcons are not refcounted */ 2990 spin_lock(&cifs_tcp_ses_lock); 2991 tcon->tc_count--; 2992 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2993 netfs_trace_tcon_ref_dec_dfs_refer); 2994 /* tc_count can never go negative */ 2995 WARN_ON(tcon->tc_count < 0); 2996 spin_unlock(&cifs_tcp_ses_lock); 2997 } 2998 kfree(utf16_path); 2999 kfree(dfs_req); 3000 kfree(dfs_rsp); 3001 return rc; 3002 } 3003 3004 static struct cifs_ntsd * 3005 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3006 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3007 { 3008 struct cifs_ntsd *pntsd = NULL; 3009 unsigned int xid; 3010 int rc = -EOPNOTSUPP; 3011 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3012 3013 if (IS_ERR(tlink)) 3014 return ERR_CAST(tlink); 3015 3016 xid = get_xid(); 3017 cifs_dbg(FYI, "trying to get acl\n"); 3018 3019 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3020 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3021 info); 3022 free_xid(xid); 3023 3024 cifs_put_tlink(tlink); 3025 3026 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3027 if (rc) 3028 return ERR_PTR(rc); 3029 return pntsd; 3030 3031 } 3032 3033 static struct cifs_ntsd * 3034 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3035 const char *path, u32 *pacllen, u32 info) 3036 { 3037 struct cifs_ntsd *pntsd = NULL; 3038 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3039 unsigned int xid; 3040 int rc; 3041 struct cifs_tcon *tcon; 3042 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3043 struct cifs_fid fid; 3044 struct cifs_open_parms oparms; 3045 __le16 *utf16_path; 3046 3047 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3048 if (IS_ERR(tlink)) 3049 return ERR_CAST(tlink); 3050 3051 tcon = tlink_tcon(tlink); 3052 xid = get_xid(); 3053 3054 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3055 if (!utf16_path) { 3056 rc = -ENOMEM; 3057 free_xid(xid); 3058 return ERR_PTR(rc); 3059 } 3060 3061 oparms = (struct cifs_open_parms) { 3062 .tcon = tcon, 3063 .path = path, 3064 .desired_access = READ_CONTROL, 3065 .disposition = FILE_OPEN, 3066 /* 3067 * When querying an ACL, even if the file is a symlink 3068 * we want to open the source not the target, and so 3069 * the protocol requires that the client specify this 3070 * flag when opening a reparse point 3071 */ 3072 .create_options = cifs_create_options(cifs_sb, 0) | 3073 OPEN_REPARSE_POINT, 3074 .fid = &fid, 3075 }; 3076 3077 if (info & SACL_SECINFO) 3078 oparms.desired_access |= SYSTEM_SECURITY; 3079 3080 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3081 NULL); 3082 kfree(utf16_path); 3083 if (!rc) { 3084 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3085 fid.volatile_fid, (void **)&pntsd, pacllen, 3086 info); 3087 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3088 } 3089 3090 cifs_put_tlink(tlink); 3091 free_xid(xid); 3092 3093 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3094 if (rc) 3095 return ERR_PTR(rc); 3096 return pntsd; 3097 } 3098 3099 static int 3100 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3101 struct inode *inode, const char *path, int aclflag) 3102 { 3103 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3104 unsigned int xid; 3105 int rc, access_flags = 0; 3106 struct cifs_tcon *tcon; 3107 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3108 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3109 struct cifs_fid fid; 3110 struct cifs_open_parms oparms; 3111 __le16 *utf16_path; 3112 3113 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3114 if (IS_ERR(tlink)) 3115 return PTR_ERR(tlink); 3116 3117 tcon = tlink_tcon(tlink); 3118 xid = get_xid(); 3119 3120 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3121 access_flags |= WRITE_OWNER; 3122 if (aclflag & CIFS_ACL_SACL) 3123 access_flags |= SYSTEM_SECURITY; 3124 if (aclflag & CIFS_ACL_DACL) 3125 access_flags |= WRITE_DAC; 3126 3127 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3128 if (!utf16_path) { 3129 rc = -ENOMEM; 3130 free_xid(xid); 3131 return rc; 3132 } 3133 3134 oparms = (struct cifs_open_parms) { 3135 .tcon = tcon, 3136 .desired_access = access_flags, 3137 .create_options = cifs_create_options(cifs_sb, 0), 3138 .disposition = FILE_OPEN, 3139 .path = path, 3140 .fid = &fid, 3141 }; 3142 3143 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3144 NULL, NULL); 3145 kfree(utf16_path); 3146 if (!rc) { 3147 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3148 fid.volatile_fid, pnntsd, acllen, aclflag); 3149 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3150 } 3151 3152 cifs_put_tlink(tlink); 3153 free_xid(xid); 3154 return rc; 3155 } 3156 3157 /* Retrieve an ACL from the server */ 3158 static struct cifs_ntsd * 3159 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3160 struct inode *inode, const char *path, 3161 u32 *pacllen, u32 info) 3162 { 3163 struct cifs_ntsd *pntsd = NULL; 3164 struct cifsFileInfo *open_file = NULL; 3165 3166 if (inode && !(info & SACL_SECINFO)) 3167 open_file = find_readable_file(CIFS_I(inode), true); 3168 if (!open_file || (info & SACL_SECINFO)) 3169 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3170 3171 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3172 cifsFileInfo_put(open_file); 3173 return pntsd; 3174 } 3175 3176 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3177 loff_t offset, loff_t len, unsigned int xid) 3178 { 3179 struct cifsFileInfo *cfile = file->private_data; 3180 struct file_zero_data_information fsctl_buf; 3181 3182 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3183 3184 fsctl_buf.FileOffset = cpu_to_le64(offset); 3185 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3186 3187 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3188 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3189 (char *)&fsctl_buf, 3190 sizeof(struct file_zero_data_information), 3191 0, NULL, NULL); 3192 } 3193 3194 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3195 unsigned long long offset, unsigned long long len, 3196 bool keep_size) 3197 { 3198 struct cifs_ses *ses = tcon->ses; 3199 struct inode *inode = file_inode(file); 3200 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3201 struct cifsFileInfo *cfile = file->private_data; 3202 struct netfs_inode *ictx = netfs_inode(inode); 3203 unsigned long long i_size, new_size, remote_size; 3204 long rc; 3205 unsigned int xid; 3206 3207 xid = get_xid(); 3208 3209 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3210 ses->Suid, offset, len); 3211 3212 inode_lock(inode); 3213 filemap_invalidate_lock(inode->i_mapping); 3214 3215 i_size = i_size_read(inode); 3216 remote_size = ictx->remote_i_size; 3217 if (offset + len >= remote_size && offset < i_size) { 3218 unsigned long long top = umin(offset + len, i_size); 3219 3220 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); 3221 if (rc < 0) 3222 goto zero_range_exit; 3223 } 3224 3225 /* 3226 * We zero the range through ioctl, so we need remove the page caches 3227 * first, otherwise the data may be inconsistent with the server. 3228 */ 3229 truncate_pagecache_range(inode, offset, offset + len - 1); 3230 3231 /* if file not oplocked can't be sure whether asking to extend size */ 3232 rc = -EOPNOTSUPP; 3233 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3234 goto zero_range_exit; 3235 3236 rc = smb3_zero_data(file, tcon, offset, len, xid); 3237 if (rc < 0) 3238 goto zero_range_exit; 3239 3240 /* 3241 * do we also need to change the size of the file? 3242 */ 3243 new_size = offset + len; 3244 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3245 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3246 cfile->fid.volatile_fid, cfile->pid, new_size); 3247 if (rc >= 0) { 3248 truncate_setsize(inode, new_size); 3249 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3250 } 3251 } 3252 3253 zero_range_exit: 3254 filemap_invalidate_unlock(inode->i_mapping); 3255 inode_unlock(inode); 3256 free_xid(xid); 3257 if (rc) 3258 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3259 ses->Suid, offset, len, rc); 3260 else 3261 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3262 ses->Suid, offset, len); 3263 return rc; 3264 } 3265 3266 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3267 loff_t offset, loff_t len) 3268 { 3269 struct inode *inode = file_inode(file); 3270 struct cifsFileInfo *cfile = file->private_data; 3271 struct file_zero_data_information fsctl_buf; 3272 unsigned long long end = offset + len, i_size, remote_i_size; 3273 long rc; 3274 unsigned int xid; 3275 __u8 set_sparse = 1; 3276 3277 xid = get_xid(); 3278 3279 inode_lock(inode); 3280 /* Need to make file sparse, if not already, before freeing range. */ 3281 /* Consider adding equivalent for compressed since it could also work */ 3282 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3283 rc = -EOPNOTSUPP; 3284 goto out; 3285 } 3286 3287 filemap_invalidate_lock(inode->i_mapping); 3288 /* 3289 * We implement the punch hole through ioctl, so we need remove the page 3290 * caches first, otherwise the data may be inconsistent with the server. 3291 */ 3292 truncate_pagecache_range(inode, offset, offset + len - 1); 3293 3294 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3295 3296 fsctl_buf.FileOffset = cpu_to_le64(offset); 3297 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3298 3299 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3300 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3301 (char *)&fsctl_buf, 3302 sizeof(struct file_zero_data_information), 3303 CIFSMaxBufSize, NULL, NULL); 3304 3305 if (rc) 3306 goto unlock; 3307 3308 /* If there's dirty data in the buffer that would extend the EOF if it 3309 * were written, then we need to move the EOF marker over to the lower 3310 * of the high end of the hole and the proposed EOF. The problem is 3311 * that we locally hole-punch the tail of the dirty data, the proposed 3312 * EOF update will end up in the wrong place. 3313 */ 3314 i_size = i_size_read(inode); 3315 remote_i_size = netfs_inode(inode)->remote_i_size; 3316 if (end > remote_i_size && i_size > remote_i_size) { 3317 unsigned long long extend_to = umin(end, i_size); 3318 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3319 cfile->fid.volatile_fid, cfile->pid, extend_to); 3320 if (rc >= 0) 3321 netfs_inode(inode)->remote_i_size = extend_to; 3322 } 3323 3324 unlock: 3325 filemap_invalidate_unlock(inode->i_mapping); 3326 out: 3327 inode_unlock(inode); 3328 free_xid(xid); 3329 return rc; 3330 } 3331 3332 static int smb3_simple_fallocate_write_range(unsigned int xid, 3333 struct cifs_tcon *tcon, 3334 struct cifsFileInfo *cfile, 3335 loff_t off, loff_t len, 3336 char *buf) 3337 { 3338 struct cifs_io_parms io_parms = {0}; 3339 int nbytes; 3340 int rc = 0; 3341 struct kvec iov[2]; 3342 3343 io_parms.netfid = cfile->fid.netfid; 3344 io_parms.pid = current->tgid; 3345 io_parms.tcon = tcon; 3346 io_parms.persistent_fid = cfile->fid.persistent_fid; 3347 io_parms.volatile_fid = cfile->fid.volatile_fid; 3348 3349 while (len) { 3350 io_parms.offset = off; 3351 io_parms.length = len; 3352 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3353 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3354 /* iov[0] is reserved for smb header */ 3355 iov[1].iov_base = buf; 3356 iov[1].iov_len = io_parms.length; 3357 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3358 if (rc) 3359 break; 3360 if (nbytes > len) 3361 return -EINVAL; 3362 buf += nbytes; 3363 off += nbytes; 3364 len -= nbytes; 3365 } 3366 return rc; 3367 } 3368 3369 static int smb3_simple_fallocate_range(unsigned int xid, 3370 struct cifs_tcon *tcon, 3371 struct cifsFileInfo *cfile, 3372 loff_t off, loff_t len) 3373 { 3374 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3375 u32 out_data_len; 3376 char *buf = NULL; 3377 loff_t l; 3378 int rc; 3379 3380 in_data.file_offset = cpu_to_le64(off); 3381 in_data.length = cpu_to_le64(len); 3382 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3383 cfile->fid.volatile_fid, 3384 FSCTL_QUERY_ALLOCATED_RANGES, 3385 (char *)&in_data, sizeof(in_data), 3386 1024 * sizeof(struct file_allocated_range_buffer), 3387 (char **)&out_data, &out_data_len); 3388 if (rc) 3389 goto out; 3390 3391 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3392 if (buf == NULL) { 3393 rc = -ENOMEM; 3394 goto out; 3395 } 3396 3397 tmp_data = out_data; 3398 while (len) { 3399 /* 3400 * The rest of the region is unmapped so write it all. 3401 */ 3402 if (out_data_len == 0) { 3403 rc = smb3_simple_fallocate_write_range(xid, tcon, 3404 cfile, off, len, buf); 3405 goto out; 3406 } 3407 3408 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3409 rc = -EINVAL; 3410 goto out; 3411 } 3412 3413 if (off < le64_to_cpu(tmp_data->file_offset)) { 3414 /* 3415 * We are at a hole. Write until the end of the region 3416 * or until the next allocated data, 3417 * whichever comes next. 3418 */ 3419 l = le64_to_cpu(tmp_data->file_offset) - off; 3420 if (len < l) 3421 l = len; 3422 rc = smb3_simple_fallocate_write_range(xid, tcon, 3423 cfile, off, l, buf); 3424 if (rc) 3425 goto out; 3426 off = off + l; 3427 len = len - l; 3428 if (len == 0) 3429 goto out; 3430 } 3431 /* 3432 * We are at a section of allocated data, just skip forward 3433 * until the end of the data or the end of the region 3434 * we are supposed to fallocate, whichever comes first. 3435 */ 3436 l = le64_to_cpu(tmp_data->length); 3437 if (len < l) 3438 l = len; 3439 off += l; 3440 len -= l; 3441 3442 tmp_data = &tmp_data[1]; 3443 out_data_len -= sizeof(struct file_allocated_range_buffer); 3444 } 3445 3446 out: 3447 kfree(out_data); 3448 kfree(buf); 3449 return rc; 3450 } 3451 3452 3453 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3454 loff_t off, loff_t len, bool keep_size) 3455 { 3456 struct inode *inode; 3457 struct cifsInodeInfo *cifsi; 3458 struct cifsFileInfo *cfile = file->private_data; 3459 long rc = -EOPNOTSUPP; 3460 unsigned int xid; 3461 loff_t new_eof; 3462 3463 xid = get_xid(); 3464 3465 inode = d_inode(cfile->dentry); 3466 cifsi = CIFS_I(inode); 3467 3468 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3469 tcon->ses->Suid, off, len); 3470 /* if file not oplocked can't be sure whether asking to extend size */ 3471 if (!CIFS_CACHE_READ(cifsi)) 3472 if (keep_size == false) { 3473 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3474 tcon->tid, tcon->ses->Suid, off, len, rc); 3475 free_xid(xid); 3476 return rc; 3477 } 3478 3479 /* 3480 * Extending the file 3481 */ 3482 if ((keep_size == false) && i_size_read(inode) < off + len) { 3483 rc = inode_newsize_ok(inode, off + len); 3484 if (rc) 3485 goto out; 3486 3487 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3488 smb2_set_sparse(xid, tcon, cfile, inode, false); 3489 3490 new_eof = off + len; 3491 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3492 cfile->fid.volatile_fid, cfile->pid, new_eof); 3493 if (rc == 0) { 3494 cifsi->server_eof = new_eof; 3495 cifs_setsize(inode, new_eof); 3496 cifs_truncate_page(inode->i_mapping, inode->i_size); 3497 truncate_setsize(inode, new_eof); 3498 } 3499 goto out; 3500 } 3501 3502 /* 3503 * Files are non-sparse by default so falloc may be a no-op 3504 * Must check if file sparse. If not sparse, and since we are not 3505 * extending then no need to do anything since file already allocated 3506 */ 3507 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3508 rc = 0; 3509 goto out; 3510 } 3511 3512 if (keep_size == true) { 3513 /* 3514 * We can not preallocate pages beyond the end of the file 3515 * in SMB2 3516 */ 3517 if (off >= i_size_read(inode)) { 3518 rc = 0; 3519 goto out; 3520 } 3521 /* 3522 * For fallocates that are partially beyond the end of file, 3523 * clamp len so we only fallocate up to the end of file. 3524 */ 3525 if (off + len > i_size_read(inode)) { 3526 len = i_size_read(inode) - off; 3527 } 3528 } 3529 3530 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3531 /* 3532 * At this point, we are trying to fallocate an internal 3533 * regions of a sparse file. Since smb2 does not have a 3534 * fallocate command we have two otions on how to emulate this. 3535 * We can either turn the entire file to become non-sparse 3536 * which we only do if the fallocate is for virtually 3537 * the whole file, or we can overwrite the region with zeroes 3538 * using SMB2_write, which could be prohibitevly expensive 3539 * if len is large. 3540 */ 3541 /* 3542 * We are only trying to fallocate a small region so 3543 * just write it with zero. 3544 */ 3545 if (len <= 1024 * 1024) { 3546 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3547 off, len); 3548 goto out; 3549 } 3550 3551 /* 3552 * Check if falloc starts within first few pages of file 3553 * and ends within a few pages of the end of file to 3554 * ensure that most of file is being forced to be 3555 * fallocated now. If so then setting whole file sparse 3556 * ie potentially making a few extra pages at the beginning 3557 * or end of the file non-sparse via set_sparse is harmless. 3558 */ 3559 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3560 rc = -EOPNOTSUPP; 3561 goto out; 3562 } 3563 } 3564 3565 smb2_set_sparse(xid, tcon, cfile, inode, false); 3566 rc = 0; 3567 3568 out: 3569 if (rc) 3570 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3571 tcon->ses->Suid, off, len, rc); 3572 else 3573 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3574 tcon->ses->Suid, off, len); 3575 3576 free_xid(xid); 3577 return rc; 3578 } 3579 3580 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3581 loff_t off, loff_t len) 3582 { 3583 int rc; 3584 unsigned int xid; 3585 struct inode *inode = file_inode(file); 3586 struct cifsFileInfo *cfile = file->private_data; 3587 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3588 loff_t old_eof, new_eof; 3589 3590 xid = get_xid(); 3591 3592 inode_lock(inode); 3593 3594 old_eof = i_size_read(inode); 3595 if ((off >= old_eof) || 3596 off + len >= old_eof) { 3597 rc = -EINVAL; 3598 goto out; 3599 } 3600 3601 filemap_invalidate_lock(inode->i_mapping); 3602 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3603 if (rc < 0) 3604 goto out_2; 3605 3606 truncate_pagecache_range(inode, off, old_eof); 3607 3608 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3609 old_eof - off - len, off); 3610 if (rc < 0) 3611 goto out_2; 3612 3613 new_eof = old_eof - len; 3614 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3615 cfile->fid.volatile_fid, cfile->pid, new_eof); 3616 if (rc < 0) 3617 goto out_2; 3618 3619 rc = 0; 3620 3621 cifsi->server_eof = i_size_read(inode) - len; 3622 truncate_setsize(inode, cifsi->server_eof); 3623 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3624 out_2: 3625 filemap_invalidate_unlock(inode->i_mapping); 3626 out: 3627 inode_unlock(inode); 3628 free_xid(xid); 3629 return rc; 3630 } 3631 3632 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3633 loff_t off, loff_t len) 3634 { 3635 int rc; 3636 unsigned int xid; 3637 struct cifsFileInfo *cfile = file->private_data; 3638 struct inode *inode = file_inode(file); 3639 __u64 count, old_eof, new_eof; 3640 3641 xid = get_xid(); 3642 3643 inode_lock(inode); 3644 3645 old_eof = i_size_read(inode); 3646 if (off >= old_eof) { 3647 rc = -EINVAL; 3648 goto out; 3649 } 3650 3651 count = old_eof - off; 3652 new_eof = old_eof + len; 3653 3654 filemap_invalidate_lock(inode->i_mapping); 3655 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3656 if (rc < 0) 3657 goto out_2; 3658 truncate_pagecache_range(inode, off, old_eof); 3659 3660 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3661 cfile->fid.volatile_fid, cfile->pid, new_eof); 3662 if (rc < 0) 3663 goto out_2; 3664 3665 truncate_setsize(inode, new_eof); 3666 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3667 3668 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3669 if (rc < 0) 3670 goto out_2; 3671 3672 rc = smb3_zero_data(file, tcon, off, len, xid); 3673 if (rc < 0) 3674 goto out_2; 3675 3676 rc = 0; 3677 out_2: 3678 filemap_invalidate_unlock(inode->i_mapping); 3679 out: 3680 inode_unlock(inode); 3681 free_xid(xid); 3682 return rc; 3683 } 3684 3685 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3686 { 3687 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3688 struct cifsInodeInfo *cifsi; 3689 struct inode *inode; 3690 int rc = 0; 3691 struct file_allocated_range_buffer in_data, *out_data = NULL; 3692 u32 out_data_len; 3693 unsigned int xid; 3694 3695 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3696 return generic_file_llseek(file, offset, whence); 3697 3698 inode = d_inode(cfile->dentry); 3699 cifsi = CIFS_I(inode); 3700 3701 if (offset < 0 || offset >= i_size_read(inode)) 3702 return -ENXIO; 3703 3704 xid = get_xid(); 3705 /* 3706 * We need to be sure that all dirty pages are written as they 3707 * might fill holes on the server. 3708 * Note that we also MUST flush any written pages since at least 3709 * some servers (Windows2016) will not reflect recent writes in 3710 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3711 */ 3712 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3713 if (wrcfile) { 3714 filemap_write_and_wait(inode->i_mapping); 3715 smb2_flush_file(xid, tcon, &wrcfile->fid); 3716 cifsFileInfo_put(wrcfile); 3717 } 3718 3719 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3720 if (whence == SEEK_HOLE) 3721 offset = i_size_read(inode); 3722 goto lseek_exit; 3723 } 3724 3725 in_data.file_offset = cpu_to_le64(offset); 3726 in_data.length = cpu_to_le64(i_size_read(inode)); 3727 3728 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3729 cfile->fid.volatile_fid, 3730 FSCTL_QUERY_ALLOCATED_RANGES, 3731 (char *)&in_data, sizeof(in_data), 3732 sizeof(struct file_allocated_range_buffer), 3733 (char **)&out_data, &out_data_len); 3734 if (rc == -E2BIG) 3735 rc = 0; 3736 if (rc) 3737 goto lseek_exit; 3738 3739 if (whence == SEEK_HOLE && out_data_len == 0) 3740 goto lseek_exit; 3741 3742 if (whence == SEEK_DATA && out_data_len == 0) { 3743 rc = -ENXIO; 3744 goto lseek_exit; 3745 } 3746 3747 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3748 rc = -EINVAL; 3749 goto lseek_exit; 3750 } 3751 if (whence == SEEK_DATA) { 3752 offset = le64_to_cpu(out_data->file_offset); 3753 goto lseek_exit; 3754 } 3755 if (offset < le64_to_cpu(out_data->file_offset)) 3756 goto lseek_exit; 3757 3758 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3759 3760 lseek_exit: 3761 free_xid(xid); 3762 kfree(out_data); 3763 if (!rc) 3764 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3765 else 3766 return rc; 3767 } 3768 3769 static int smb3_fiemap(struct cifs_tcon *tcon, 3770 struct cifsFileInfo *cfile, 3771 struct fiemap_extent_info *fei, u64 start, u64 len) 3772 { 3773 unsigned int xid; 3774 struct file_allocated_range_buffer in_data, *out_data; 3775 u32 out_data_len; 3776 int i, num, rc, flags, last_blob; 3777 u64 next; 3778 3779 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3780 if (rc) 3781 return rc; 3782 3783 xid = get_xid(); 3784 again: 3785 in_data.file_offset = cpu_to_le64(start); 3786 in_data.length = cpu_to_le64(len); 3787 3788 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3789 cfile->fid.volatile_fid, 3790 FSCTL_QUERY_ALLOCATED_RANGES, 3791 (char *)&in_data, sizeof(in_data), 3792 1024 * sizeof(struct file_allocated_range_buffer), 3793 (char **)&out_data, &out_data_len); 3794 if (rc == -E2BIG) { 3795 last_blob = 0; 3796 rc = 0; 3797 } else 3798 last_blob = 1; 3799 if (rc) 3800 goto out; 3801 3802 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3803 rc = -EINVAL; 3804 goto out; 3805 } 3806 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3807 rc = -EINVAL; 3808 goto out; 3809 } 3810 3811 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3812 for (i = 0; i < num; i++) { 3813 flags = 0; 3814 if (i == num - 1 && last_blob) 3815 flags |= FIEMAP_EXTENT_LAST; 3816 3817 rc = fiemap_fill_next_extent(fei, 3818 le64_to_cpu(out_data[i].file_offset), 3819 le64_to_cpu(out_data[i].file_offset), 3820 le64_to_cpu(out_data[i].length), 3821 flags); 3822 if (rc < 0) 3823 goto out; 3824 if (rc == 1) { 3825 rc = 0; 3826 goto out; 3827 } 3828 } 3829 3830 if (!last_blob) { 3831 next = le64_to_cpu(out_data[num - 1].file_offset) + 3832 le64_to_cpu(out_data[num - 1].length); 3833 len = len - (next - start); 3834 start = next; 3835 goto again; 3836 } 3837 3838 out: 3839 free_xid(xid); 3840 kfree(out_data); 3841 return rc; 3842 } 3843 3844 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3845 loff_t off, loff_t len) 3846 { 3847 /* KEEP_SIZE already checked for by do_fallocate */ 3848 if (mode & FALLOC_FL_PUNCH_HOLE) 3849 return smb3_punch_hole(file, tcon, off, len); 3850 else if (mode & FALLOC_FL_ZERO_RANGE) { 3851 if (mode & FALLOC_FL_KEEP_SIZE) 3852 return smb3_zero_range(file, tcon, off, len, true); 3853 return smb3_zero_range(file, tcon, off, len, false); 3854 } else if (mode == FALLOC_FL_KEEP_SIZE) 3855 return smb3_simple_falloc(file, tcon, off, len, true); 3856 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3857 return smb3_collapse_range(file, tcon, off, len); 3858 else if (mode == FALLOC_FL_INSERT_RANGE) 3859 return smb3_insert_range(file, tcon, off, len); 3860 else if (mode == 0) 3861 return smb3_simple_falloc(file, tcon, off, len, false); 3862 3863 return -EOPNOTSUPP; 3864 } 3865 3866 static void 3867 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3868 struct cifsInodeInfo *cinode, __u32 oplock, 3869 unsigned int epoch, bool *purge_cache) 3870 { 3871 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3872 } 3873 3874 static void 3875 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3876 unsigned int epoch, bool *purge_cache); 3877 3878 static void 3879 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3880 struct cifsInodeInfo *cinode, __u32 oplock, 3881 unsigned int epoch, bool *purge_cache) 3882 { 3883 unsigned int old_state = cinode->oplock; 3884 unsigned int old_epoch = cinode->epoch; 3885 unsigned int new_state; 3886 3887 if (epoch > old_epoch) { 3888 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3889 cinode->epoch = epoch; 3890 } 3891 3892 new_state = cinode->oplock; 3893 *purge_cache = false; 3894 3895 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3896 (new_state & CIFS_CACHE_READ_FLG) == 0) 3897 *purge_cache = true; 3898 else if (old_state == new_state && (epoch - old_epoch > 1)) 3899 *purge_cache = true; 3900 } 3901 3902 static void 3903 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3904 unsigned int epoch, bool *purge_cache) 3905 { 3906 oplock &= 0xFF; 3907 cinode->lease_granted = false; 3908 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3909 return; 3910 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3911 cinode->oplock = CIFS_CACHE_RHW_FLG; 3912 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3913 &cinode->netfs.inode); 3914 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3915 cinode->oplock = CIFS_CACHE_RW_FLG; 3916 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3917 &cinode->netfs.inode); 3918 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3919 cinode->oplock = CIFS_CACHE_READ_FLG; 3920 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3921 &cinode->netfs.inode); 3922 } else 3923 cinode->oplock = 0; 3924 } 3925 3926 static void 3927 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3928 unsigned int epoch, bool *purge_cache) 3929 { 3930 char message[5] = {0}; 3931 unsigned int new_oplock = 0; 3932 3933 oplock &= 0xFF; 3934 cinode->lease_granted = true; 3935 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3936 return; 3937 3938 /* Check if the server granted an oplock rather than a lease */ 3939 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3940 return smb2_set_oplock_level(cinode, oplock, epoch, 3941 purge_cache); 3942 3943 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3944 new_oplock |= CIFS_CACHE_READ_FLG; 3945 strcat(message, "R"); 3946 } 3947 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3948 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3949 strcat(message, "H"); 3950 } 3951 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3952 new_oplock |= CIFS_CACHE_WRITE_FLG; 3953 strcat(message, "W"); 3954 } 3955 if (!new_oplock) 3956 strncpy(message, "None", sizeof(message)); 3957 3958 cinode->oplock = new_oplock; 3959 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3960 &cinode->netfs.inode); 3961 } 3962 3963 static void 3964 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3965 unsigned int epoch, bool *purge_cache) 3966 { 3967 unsigned int old_oplock = cinode->oplock; 3968 3969 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3970 3971 if (purge_cache) { 3972 *purge_cache = false; 3973 if (old_oplock == CIFS_CACHE_READ_FLG) { 3974 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3975 (epoch - cinode->epoch > 0)) 3976 *purge_cache = true; 3977 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3978 (epoch - cinode->epoch > 1)) 3979 *purge_cache = true; 3980 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3981 (epoch - cinode->epoch > 1)) 3982 *purge_cache = true; 3983 else if (cinode->oplock == 0 && 3984 (epoch - cinode->epoch > 0)) 3985 *purge_cache = true; 3986 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3987 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3988 (epoch - cinode->epoch > 0)) 3989 *purge_cache = true; 3990 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3991 (epoch - cinode->epoch > 1)) 3992 *purge_cache = true; 3993 } 3994 cinode->epoch = epoch; 3995 } 3996 } 3997 3998 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3999 static bool 4000 smb2_is_read_op(__u32 oplock) 4001 { 4002 return oplock == SMB2_OPLOCK_LEVEL_II; 4003 } 4004 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4005 4006 static bool 4007 smb21_is_read_op(__u32 oplock) 4008 { 4009 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4010 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4011 } 4012 4013 static __le32 4014 map_oplock_to_lease(u8 oplock) 4015 { 4016 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4017 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4018 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4019 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE; 4020 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4021 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4022 SMB2_LEASE_WRITE_CACHING_LE; 4023 return 0; 4024 } 4025 4026 static char * 4027 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 4028 { 4029 struct create_lease *buf; 4030 4031 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4032 if (!buf) 4033 return NULL; 4034 4035 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4036 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4037 4038 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4039 (struct create_lease, lcontext)); 4040 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4041 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4042 (struct create_lease, Name)); 4043 buf->ccontext.NameLength = cpu_to_le16(4); 4044 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4045 buf->Name[0] = 'R'; 4046 buf->Name[1] = 'q'; 4047 buf->Name[2] = 'L'; 4048 buf->Name[3] = 's'; 4049 return (char *)buf; 4050 } 4051 4052 static char * 4053 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4054 { 4055 struct create_lease_v2 *buf; 4056 4057 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4058 if (!buf) 4059 return NULL; 4060 4061 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4062 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4063 4064 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4065 (struct create_lease_v2, lcontext)); 4066 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4067 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4068 (struct create_lease_v2, Name)); 4069 buf->ccontext.NameLength = cpu_to_le16(4); 4070 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4071 buf->Name[0] = 'R'; 4072 buf->Name[1] = 'q'; 4073 buf->Name[2] = 'L'; 4074 buf->Name[3] = 's'; 4075 return (char *)buf; 4076 } 4077 4078 static __u8 4079 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4080 { 4081 struct create_lease *lc = (struct create_lease *)buf; 4082 4083 *epoch = 0; /* not used */ 4084 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4085 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4086 return le32_to_cpu(lc->lcontext.LeaseState); 4087 } 4088 4089 static __u8 4090 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4091 { 4092 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4093 4094 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4095 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4096 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4097 if (lease_key) 4098 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4099 return le32_to_cpu(lc->lcontext.LeaseState); 4100 } 4101 4102 static unsigned int 4103 smb2_wp_retry_size(struct inode *inode) 4104 { 4105 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4106 SMB2_MAX_BUFFER_SIZE); 4107 } 4108 4109 static bool 4110 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4111 { 4112 return !cfile->invalidHandle; 4113 } 4114 4115 static void 4116 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4117 struct smb_rqst *old_rq, __le16 cipher_type) 4118 { 4119 struct smb2_hdr *shdr = 4120 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4121 4122 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4123 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4124 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4125 tr_hdr->Flags = cpu_to_le16(0x01); 4126 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4127 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4128 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4129 else 4130 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4131 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4132 } 4133 4134 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4135 int num_rqst, const u8 *sig, u8 **iv, 4136 struct aead_request **req, struct sg_table *sgt, 4137 unsigned int *num_sgs, size_t *sensitive_size) 4138 { 4139 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4140 unsigned int iv_size = crypto_aead_ivsize(tfm); 4141 unsigned int len; 4142 u8 *p; 4143 4144 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4145 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4146 return ERR_PTR(*num_sgs); 4147 4148 len = iv_size; 4149 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4150 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4151 len += req_size; 4152 len = ALIGN(len, __alignof__(struct scatterlist)); 4153 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4154 *sensitive_size = len; 4155 4156 p = kvzalloc(len, GFP_NOFS); 4157 if (!p) 4158 return ERR_PTR(-ENOMEM); 4159 4160 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4161 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4162 crypto_tfm_ctx_alignment()); 4163 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4164 __alignof__(struct scatterlist)); 4165 return p; 4166 } 4167 4168 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4169 int num_rqst, const u8 *sig, u8 **iv, 4170 struct aead_request **req, struct scatterlist **sgl, 4171 size_t *sensitive_size) 4172 { 4173 struct sg_table sgtable = {}; 4174 unsigned int skip, num_sgs, i, j; 4175 ssize_t rc; 4176 void *p; 4177 4178 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4179 &num_sgs, sensitive_size); 4180 if (IS_ERR(p)) 4181 return ERR_CAST(p); 4182 4183 sg_init_marker(sgtable.sgl, num_sgs); 4184 4185 /* 4186 * The first rqst has a transform header where the 4187 * first 20 bytes are not part of the encrypted blob. 4188 */ 4189 skip = 20; 4190 4191 for (i = 0; i < num_rqst; i++) { 4192 struct iov_iter *iter = &rqst[i].rq_iter; 4193 size_t count = iov_iter_count(iter); 4194 4195 for (j = 0; j < rqst[i].rq_nvec; j++) { 4196 cifs_sg_set_buf(&sgtable, 4197 rqst[i].rq_iov[j].iov_base + skip, 4198 rqst[i].rq_iov[j].iov_len - skip); 4199 4200 /* See the above comment on the 'skip' assignment */ 4201 skip = 0; 4202 } 4203 sgtable.orig_nents = sgtable.nents; 4204 4205 rc = extract_iter_to_sg(iter, count, &sgtable, 4206 num_sgs - sgtable.nents, 0); 4207 iov_iter_revert(iter, rc); 4208 sgtable.orig_nents = sgtable.nents; 4209 } 4210 4211 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4212 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4213 *sgl = sgtable.sgl; 4214 return p; 4215 } 4216 4217 static int 4218 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4219 { 4220 struct TCP_Server_Info *pserver; 4221 struct cifs_ses *ses; 4222 u8 *ses_enc_key; 4223 4224 /* If server is a channel, select the primary channel */ 4225 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4226 4227 spin_lock(&cifs_tcp_ses_lock); 4228 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4229 if (ses->Suid == ses_id) { 4230 spin_lock(&ses->ses_lock); 4231 ses_enc_key = enc ? ses->smb3encryptionkey : 4232 ses->smb3decryptionkey; 4233 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4234 spin_unlock(&ses->ses_lock); 4235 spin_unlock(&cifs_tcp_ses_lock); 4236 return 0; 4237 } 4238 } 4239 spin_unlock(&cifs_tcp_ses_lock); 4240 4241 trace_smb3_ses_not_found(ses_id); 4242 4243 return -EAGAIN; 4244 } 4245 /* 4246 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4247 * iov[0] - transform header (associate data), 4248 * iov[1-N] - SMB2 header and pages - data to encrypt. 4249 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4250 * untouched. 4251 */ 4252 static int 4253 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4254 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm) 4255 { 4256 struct smb2_transform_hdr *tr_hdr = 4257 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4258 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4259 int rc = 0; 4260 struct scatterlist *sg; 4261 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4262 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4263 struct aead_request *req; 4264 u8 *iv; 4265 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4266 void *creq; 4267 size_t sensitive_size; 4268 4269 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4270 if (rc) { 4271 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4272 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4273 return rc; 4274 } 4275 4276 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4277 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4278 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4279 else 4280 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4281 4282 if (rc) { 4283 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4284 return rc; 4285 } 4286 4287 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4288 if (rc) { 4289 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4290 return rc; 4291 } 4292 4293 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4294 &sensitive_size); 4295 if (IS_ERR(creq)) 4296 return PTR_ERR(creq); 4297 4298 if (!enc) { 4299 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4300 crypt_len += SMB2_SIGNATURE_SIZE; 4301 } 4302 4303 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4304 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4305 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4306 else { 4307 iv[0] = 3; 4308 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4309 } 4310 4311 aead_request_set_tfm(req, tfm); 4312 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4313 aead_request_set_ad(req, assoc_data_len); 4314 4315 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req); 4316 4317 if (!rc && enc) 4318 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4319 4320 kvfree_sensitive(creq, sensitive_size); 4321 return rc; 4322 } 4323 4324 /* 4325 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4326 */ 4327 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4328 { 4329 struct folio *folio; 4330 4331 XA_STATE(xas, buffer, 0); 4332 4333 rcu_read_lock(); 4334 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4335 folio_put(folio); 4336 } 4337 rcu_read_unlock(); 4338 xa_destroy(buffer); 4339 } 4340 4341 void 4342 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4343 { 4344 int i; 4345 4346 for (i = 0; i < num_rqst; i++) 4347 if (!xa_empty(&rqst[i].rq_buffer)) 4348 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4349 } 4350 4351 /* 4352 * This function will initialize new_rq and encrypt the content. 4353 * The first entry, new_rq[0], only contains a single iov which contains 4354 * a smb2_transform_hdr and is pre-allocated by the caller. 4355 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4356 * 4357 * The end result is an array of smb_rqst structures where the first structure 4358 * only contains a single iov for the transform header which we then can pass 4359 * to crypt_message(). 4360 * 4361 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4362 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4363 */ 4364 static int 4365 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4366 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4367 { 4368 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4369 struct page *page; 4370 unsigned int orig_len = 0; 4371 int i, j; 4372 int rc = -ENOMEM; 4373 4374 for (i = 1; i < num_rqst; i++) { 4375 struct smb_rqst *old = &old_rq[i - 1]; 4376 struct smb_rqst *new = &new_rq[i]; 4377 struct xarray *buffer = &new->rq_buffer; 4378 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4379 4380 orig_len += smb_rqst_len(server, old); 4381 new->rq_iov = old->rq_iov; 4382 new->rq_nvec = old->rq_nvec; 4383 4384 xa_init(buffer); 4385 4386 if (size > 0) { 4387 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4388 4389 for (j = 0; j < npages; j++) { 4390 void *o; 4391 4392 rc = -ENOMEM; 4393 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4394 if (!page) 4395 goto err_free; 4396 page->index = j; 4397 o = xa_store(buffer, j, page, GFP_KERNEL); 4398 if (xa_is_err(o)) { 4399 rc = xa_err(o); 4400 put_page(page); 4401 goto err_free; 4402 } 4403 4404 xa_set_mark(buffer, j, XA_MARK_0); 4405 4406 seg = min_t(size_t, size - copied, PAGE_SIZE); 4407 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4408 rc = -EFAULT; 4409 goto err_free; 4410 } 4411 copied += seg; 4412 } 4413 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4414 buffer, 0, size); 4415 new->rq_iter_size = size; 4416 } 4417 } 4418 4419 /* fill the 1st iov with a transform header */ 4420 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4421 4422 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc); 4423 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4424 if (rc) 4425 goto err_free; 4426 4427 return rc; 4428 4429 err_free: 4430 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4431 return rc; 4432 } 4433 4434 static int 4435 smb3_is_transform_hdr(void *buf) 4436 { 4437 struct smb2_transform_hdr *trhdr = buf; 4438 4439 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4440 } 4441 4442 static int 4443 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4444 unsigned int buf_data_size, struct iov_iter *iter, 4445 bool is_offloaded) 4446 { 4447 struct crypto_aead *tfm; 4448 struct smb_rqst rqst = {NULL}; 4449 struct kvec iov[2]; 4450 size_t iter_size = 0; 4451 int rc; 4452 4453 iov[0].iov_base = buf; 4454 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4455 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4456 iov[1].iov_len = buf_data_size; 4457 4458 rqst.rq_iov = iov; 4459 rqst.rq_nvec = 2; 4460 if (iter) { 4461 rqst.rq_iter = *iter; 4462 rqst.rq_iter_size = iov_iter_count(iter); 4463 iter_size = iov_iter_count(iter); 4464 } 4465 4466 if (is_offloaded) { 4467 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4468 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4469 tfm = crypto_alloc_aead("gcm(aes)", 0, 0); 4470 else 4471 tfm = crypto_alloc_aead("ccm(aes)", 0, 0); 4472 if (IS_ERR(tfm)) { 4473 rc = PTR_ERR(tfm); 4474 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc); 4475 4476 return rc; 4477 } 4478 } else { 4479 if (unlikely(!server->secmech.dec)) 4480 return -EIO; 4481 4482 tfm = server->secmech.dec; 4483 } 4484 4485 rc = crypt_message(server, 1, &rqst, 0, tfm); 4486 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4487 4488 if (is_offloaded) 4489 crypto_free_aead(tfm); 4490 4491 if (rc) 4492 return rc; 4493 4494 memmove(buf, iov[1].iov_base, buf_data_size); 4495 4496 if (!is_offloaded) 4497 server->total_read = buf_data_size + iter_size; 4498 4499 return rc; 4500 } 4501 4502 static int 4503 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4504 unsigned int skip, struct iov_iter *iter) 4505 { 4506 struct page *page; 4507 unsigned long index; 4508 4509 xa_for_each(pages, index, page) { 4510 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4511 4512 n = copy_page_to_iter(page, skip, len, iter); 4513 if (n != len) { 4514 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4515 return -EIO; 4516 } 4517 data_size -= n; 4518 skip = 0; 4519 } 4520 4521 return 0; 4522 } 4523 4524 static int 4525 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4526 char *buf, unsigned int buf_len, struct xarray *pages, 4527 unsigned int pages_len, bool is_offloaded) 4528 { 4529 unsigned int data_offset; 4530 unsigned int data_len; 4531 unsigned int cur_off; 4532 unsigned int cur_page_idx; 4533 unsigned int pad_len; 4534 struct cifs_readdata *rdata = mid->callback_data; 4535 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4536 int length; 4537 bool use_rdma_mr = false; 4538 4539 if (shdr->Command != SMB2_READ) { 4540 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4541 return -EOPNOTSUPP; 4542 } 4543 4544 if (server->ops->is_session_expired && 4545 server->ops->is_session_expired(buf)) { 4546 if (!is_offloaded) 4547 cifs_reconnect(server, true); 4548 return -1; 4549 } 4550 4551 if (server->ops->is_status_pending && 4552 server->ops->is_status_pending(buf, server)) 4553 return -1; 4554 4555 /* set up first two iov to get credits */ 4556 rdata->iov[0].iov_base = buf; 4557 rdata->iov[0].iov_len = 0; 4558 rdata->iov[1].iov_base = buf; 4559 rdata->iov[1].iov_len = 4560 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4561 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4562 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4563 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4564 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4565 4566 rdata->result = server->ops->map_error(buf, true); 4567 if (rdata->result != 0) { 4568 cifs_dbg(FYI, "%s: server returned error %d\n", 4569 __func__, rdata->result); 4570 /* normal error on read response */ 4571 if (is_offloaded) 4572 mid->mid_state = MID_RESPONSE_RECEIVED; 4573 else 4574 dequeue_mid(mid, false); 4575 return 0; 4576 } 4577 4578 data_offset = server->ops->read_data_offset(buf); 4579 #ifdef CONFIG_CIFS_SMB_DIRECT 4580 use_rdma_mr = rdata->mr; 4581 #endif 4582 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4583 4584 if (data_offset < server->vals->read_rsp_size) { 4585 /* 4586 * win2k8 sometimes sends an offset of 0 when the read 4587 * is beyond the EOF. Treat it as if the data starts just after 4588 * the header. 4589 */ 4590 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4591 __func__, data_offset); 4592 data_offset = server->vals->read_rsp_size; 4593 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4594 /* data_offset is beyond the end of smallbuf */ 4595 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4596 __func__, data_offset); 4597 rdata->result = -EIO; 4598 if (is_offloaded) 4599 mid->mid_state = MID_RESPONSE_MALFORMED; 4600 else 4601 dequeue_mid(mid, rdata->result); 4602 return 0; 4603 } 4604 4605 pad_len = data_offset - server->vals->read_rsp_size; 4606 4607 if (buf_len <= data_offset) { 4608 /* read response payload is in pages */ 4609 cur_page_idx = pad_len / PAGE_SIZE; 4610 cur_off = pad_len % PAGE_SIZE; 4611 4612 if (cur_page_idx != 0) { 4613 /* data offset is beyond the 1st page of response */ 4614 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4615 __func__, data_offset); 4616 rdata->result = -EIO; 4617 if (is_offloaded) 4618 mid->mid_state = MID_RESPONSE_MALFORMED; 4619 else 4620 dequeue_mid(mid, rdata->result); 4621 return 0; 4622 } 4623 4624 if (data_len > pages_len - pad_len) { 4625 /* data_len is corrupt -- discard frame */ 4626 rdata->result = -EIO; 4627 if (is_offloaded) 4628 mid->mid_state = MID_RESPONSE_MALFORMED; 4629 else 4630 dequeue_mid(mid, rdata->result); 4631 return 0; 4632 } 4633 4634 /* Copy the data to the output I/O iterator. */ 4635 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4636 cur_off, &rdata->iter); 4637 if (rdata->result != 0) { 4638 if (is_offloaded) 4639 mid->mid_state = MID_RESPONSE_MALFORMED; 4640 else 4641 dequeue_mid(mid, rdata->result); 4642 return 0; 4643 } 4644 rdata->got_bytes = pages_len; 4645 4646 } else if (buf_len >= data_offset + data_len) { 4647 /* read response payload is in buf */ 4648 WARN_ONCE(pages && !xa_empty(pages), 4649 "read data can be either in buf or in pages"); 4650 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4651 if (length < 0) 4652 return length; 4653 rdata->got_bytes = data_len; 4654 } else { 4655 /* read response payload cannot be in both buf and pages */ 4656 WARN_ONCE(1, "buf can not contain only a part of read data"); 4657 rdata->result = -EIO; 4658 if (is_offloaded) 4659 mid->mid_state = MID_RESPONSE_MALFORMED; 4660 else 4661 dequeue_mid(mid, rdata->result); 4662 return 0; 4663 } 4664 4665 if (is_offloaded) 4666 mid->mid_state = MID_RESPONSE_RECEIVED; 4667 else 4668 dequeue_mid(mid, false); 4669 return 0; 4670 } 4671 4672 struct smb2_decrypt_work { 4673 struct work_struct decrypt; 4674 struct TCP_Server_Info *server; 4675 struct xarray buffer; 4676 char *buf; 4677 unsigned int len; 4678 }; 4679 4680 4681 static void smb2_decrypt_offload(struct work_struct *work) 4682 { 4683 struct smb2_decrypt_work *dw = container_of(work, 4684 struct smb2_decrypt_work, decrypt); 4685 int rc; 4686 struct mid_q_entry *mid; 4687 struct iov_iter iter; 4688 4689 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4690 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4691 &iter, true); 4692 if (rc) { 4693 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4694 goto free_pages; 4695 } 4696 4697 dw->server->lstrp = jiffies; 4698 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4699 if (mid == NULL) 4700 cifs_dbg(FYI, "mid not found\n"); 4701 else { 4702 mid->decrypted = true; 4703 rc = handle_read_data(dw->server, mid, dw->buf, 4704 dw->server->vals->read_rsp_size, 4705 &dw->buffer, dw->len, 4706 true); 4707 if (rc >= 0) { 4708 #ifdef CONFIG_CIFS_STATS2 4709 mid->when_received = jiffies; 4710 #endif 4711 if (dw->server->ops->is_network_name_deleted) 4712 dw->server->ops->is_network_name_deleted(dw->buf, 4713 dw->server); 4714 4715 mid->callback(mid); 4716 } else { 4717 spin_lock(&dw->server->srv_lock); 4718 if (dw->server->tcpStatus == CifsNeedReconnect) { 4719 spin_lock(&dw->server->mid_lock); 4720 mid->mid_state = MID_RETRY_NEEDED; 4721 spin_unlock(&dw->server->mid_lock); 4722 spin_unlock(&dw->server->srv_lock); 4723 mid->callback(mid); 4724 } else { 4725 spin_lock(&dw->server->mid_lock); 4726 mid->mid_state = MID_REQUEST_SUBMITTED; 4727 mid->mid_flags &= ~(MID_DELETED); 4728 list_add_tail(&mid->qhead, 4729 &dw->server->pending_mid_q); 4730 spin_unlock(&dw->server->mid_lock); 4731 spin_unlock(&dw->server->srv_lock); 4732 } 4733 } 4734 release_mid(mid); 4735 } 4736 4737 free_pages: 4738 cifs_clear_xarray_buffer(&dw->buffer); 4739 cifs_small_buf_release(dw->buf); 4740 kfree(dw); 4741 } 4742 4743 4744 static int 4745 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4746 int *num_mids) 4747 { 4748 struct page *page; 4749 char *buf = server->smallbuf; 4750 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4751 struct iov_iter iter; 4752 unsigned int len, npages; 4753 unsigned int buflen = server->pdu_size; 4754 int rc; 4755 int i = 0; 4756 struct smb2_decrypt_work *dw; 4757 4758 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4759 if (!dw) 4760 return -ENOMEM; 4761 xa_init(&dw->buffer); 4762 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4763 dw->server = server; 4764 4765 *num_mids = 1; 4766 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4767 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4768 4769 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4770 if (rc < 0) 4771 goto free_dw; 4772 server->total_read += rc; 4773 4774 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4775 server->vals->read_rsp_size; 4776 dw->len = len; 4777 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4778 4779 rc = -ENOMEM; 4780 for (; i < npages; i++) { 4781 void *old; 4782 4783 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4784 if (!page) 4785 goto discard_data; 4786 page->index = i; 4787 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4788 if (xa_is_err(old)) { 4789 rc = xa_err(old); 4790 put_page(page); 4791 goto discard_data; 4792 } 4793 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4794 } 4795 4796 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4797 4798 /* Read the data into the buffer and clear excess bufferage. */ 4799 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4800 if (rc < 0) 4801 goto discard_data; 4802 4803 server->total_read += rc; 4804 if (rc < npages * PAGE_SIZE) 4805 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4806 iov_iter_revert(&iter, npages * PAGE_SIZE); 4807 iov_iter_truncate(&iter, dw->len); 4808 4809 rc = cifs_discard_remaining_data(server); 4810 if (rc) 4811 goto free_pages; 4812 4813 /* 4814 * For large reads, offload to different thread for better performance, 4815 * use more cores decrypting which can be expensive 4816 */ 4817 4818 if ((server->min_offload) && (server->in_flight > 1) && 4819 (server->pdu_size >= server->min_offload)) { 4820 dw->buf = server->smallbuf; 4821 server->smallbuf = (char *)cifs_small_buf_get(); 4822 4823 queue_work(decrypt_wq, &dw->decrypt); 4824 *num_mids = 0; /* worker thread takes care of finding mid */ 4825 return -1; 4826 } 4827 4828 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4829 &iter, false); 4830 if (rc) 4831 goto free_pages; 4832 4833 *mid = smb2_find_mid(server, buf); 4834 if (*mid == NULL) { 4835 cifs_dbg(FYI, "mid not found\n"); 4836 } else { 4837 cifs_dbg(FYI, "mid found\n"); 4838 (*mid)->decrypted = true; 4839 rc = handle_read_data(server, *mid, buf, 4840 server->vals->read_rsp_size, 4841 &dw->buffer, dw->len, false); 4842 if (rc >= 0) { 4843 if (server->ops->is_network_name_deleted) { 4844 server->ops->is_network_name_deleted(buf, 4845 server); 4846 } 4847 } 4848 } 4849 4850 free_pages: 4851 cifs_clear_xarray_buffer(&dw->buffer); 4852 free_dw: 4853 kfree(dw); 4854 return rc; 4855 discard_data: 4856 cifs_discard_remaining_data(server); 4857 goto free_pages; 4858 } 4859 4860 static int 4861 receive_encrypted_standard(struct TCP_Server_Info *server, 4862 struct mid_q_entry **mids, char **bufs, 4863 int *num_mids) 4864 { 4865 int ret, length; 4866 char *buf = server->smallbuf; 4867 struct smb2_hdr *shdr; 4868 unsigned int pdu_length = server->pdu_size; 4869 unsigned int buf_size; 4870 unsigned int next_cmd; 4871 struct mid_q_entry *mid_entry; 4872 int next_is_large; 4873 char *next_buffer = NULL; 4874 4875 *num_mids = 0; 4876 4877 /* switch to large buffer if too big for a small one */ 4878 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4879 server->large_buf = true; 4880 memcpy(server->bigbuf, buf, server->total_read); 4881 buf = server->bigbuf; 4882 } 4883 4884 /* now read the rest */ 4885 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4886 pdu_length - HEADER_SIZE(server) + 1); 4887 if (length < 0) 4888 return length; 4889 server->total_read += length; 4890 4891 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4892 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4893 if (length) 4894 return length; 4895 4896 next_is_large = server->large_buf; 4897 one_more: 4898 shdr = (struct smb2_hdr *)buf; 4899 next_cmd = le32_to_cpu(shdr->NextCommand); 4900 if (next_cmd) { 4901 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4902 return -1; 4903 if (next_is_large) 4904 next_buffer = (char *)cifs_buf_get(); 4905 else 4906 next_buffer = (char *)cifs_small_buf_get(); 4907 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4908 } 4909 4910 mid_entry = smb2_find_mid(server, buf); 4911 if (mid_entry == NULL) 4912 cifs_dbg(FYI, "mid not found\n"); 4913 else { 4914 cifs_dbg(FYI, "mid found\n"); 4915 mid_entry->decrypted = true; 4916 mid_entry->resp_buf_size = server->pdu_size; 4917 } 4918 4919 if (*num_mids >= MAX_COMPOUND) { 4920 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4921 return -1; 4922 } 4923 bufs[*num_mids] = buf; 4924 mids[(*num_mids)++] = mid_entry; 4925 4926 if (mid_entry && mid_entry->handle) 4927 ret = mid_entry->handle(server, mid_entry); 4928 else 4929 ret = cifs_handle_standard(server, mid_entry); 4930 4931 if (ret == 0 && next_cmd) { 4932 pdu_length -= next_cmd; 4933 server->large_buf = next_is_large; 4934 if (next_is_large) 4935 server->bigbuf = buf = next_buffer; 4936 else 4937 server->smallbuf = buf = next_buffer; 4938 goto one_more; 4939 } else if (ret != 0) { 4940 /* 4941 * ret != 0 here means that we didn't get to handle_mid() thus 4942 * server->smallbuf and server->bigbuf are still valid. We need 4943 * to free next_buffer because it is not going to be used 4944 * anywhere. 4945 */ 4946 if (next_is_large) 4947 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4948 else 4949 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4950 } 4951 4952 return ret; 4953 } 4954 4955 static int 4956 smb3_receive_transform(struct TCP_Server_Info *server, 4957 struct mid_q_entry **mids, char **bufs, int *num_mids) 4958 { 4959 char *buf = server->smallbuf; 4960 unsigned int pdu_length = server->pdu_size; 4961 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4962 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4963 4964 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4965 sizeof(struct smb2_hdr)) { 4966 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4967 pdu_length); 4968 cifs_reconnect(server, true); 4969 return -ECONNABORTED; 4970 } 4971 4972 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4973 cifs_server_dbg(VFS, "Transform message is broken\n"); 4974 cifs_reconnect(server, true); 4975 return -ECONNABORTED; 4976 } 4977 4978 /* TODO: add support for compounds containing READ. */ 4979 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4980 return receive_encrypted_read(server, &mids[0], num_mids); 4981 } 4982 4983 return receive_encrypted_standard(server, mids, bufs, num_mids); 4984 } 4985 4986 int 4987 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4988 { 4989 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4990 4991 return handle_read_data(server, mid, buf, server->pdu_size, 4992 NULL, 0, false); 4993 } 4994 4995 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4996 unsigned int *noff) 4997 { 4998 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4999 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5000 5001 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5002 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5003 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5004 return -EINVAL; 5005 } else { 5006 *noff = le32_to_cpu(hdr->NextCommand); 5007 } 5008 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5009 return -EINVAL; 5010 return 0; 5011 } 5012 5013 static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5014 struct dentry *dentry, struct cifs_tcon *tcon, 5015 const char *full_path, umode_t mode, dev_t dev) 5016 { 5017 struct TCP_Server_Info *server = tcon->ses->server; 5018 struct cifs_open_parms oparms; 5019 struct cifs_io_parms io_parms = {}; 5020 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5021 struct cifs_fid fid; 5022 unsigned int bytes_written; 5023 struct win_dev pdev = {}; 5024 struct kvec iov[2]; 5025 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5026 int rc; 5027 5028 switch (mode & S_IFMT) { 5029 case S_IFCHR: 5030 strscpy(pdev.type, "IntxCHR", strlen("IntxChr")); 5031 pdev.major = cpu_to_le64(MAJOR(dev)); 5032 pdev.minor = cpu_to_le64(MINOR(dev)); 5033 break; 5034 case S_IFBLK: 5035 strscpy(pdev.type, "IntxBLK", strlen("IntxBLK")); 5036 pdev.major = cpu_to_le64(MAJOR(dev)); 5037 pdev.minor = cpu_to_le64(MINOR(dev)); 5038 break; 5039 case S_IFIFO: 5040 strscpy(pdev.type, "LnxFIFO", strlen("LnxFIFO")); 5041 break; 5042 default: 5043 return -EPERM; 5044 } 5045 5046 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5047 FILE_CREATE, CREATE_NOT_DIR | 5048 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5049 oparms.fid = &fid; 5050 5051 rc = server->ops->open(xid, &oparms, &oplock, NULL); 5052 if (rc) 5053 return rc; 5054 5055 io_parms.pid = current->tgid; 5056 io_parms.tcon = tcon; 5057 io_parms.length = sizeof(pdev); 5058 iov[1].iov_base = &pdev; 5059 iov[1].iov_len = sizeof(pdev); 5060 5061 rc = server->ops->sync_write(xid, &fid, &io_parms, 5062 &bytes_written, iov, 1); 5063 server->ops->close(xid, tcon, &fid); 5064 return rc; 5065 } 5066 5067 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5068 struct dentry *dentry, struct cifs_tcon *tcon, 5069 const char *full_path, umode_t mode, dev_t dev) 5070 { 5071 struct inode *new = NULL; 5072 int rc; 5073 5074 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5075 full_path, mode, dev); 5076 if (rc) 5077 return rc; 5078 5079 if (tcon->posix_extensions) { 5080 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5081 inode->i_sb, xid); 5082 } else if (tcon->unix_ext) { 5083 rc = cifs_get_inode_info_unix(&new, full_path, 5084 inode->i_sb, xid); 5085 } else { 5086 rc = cifs_get_inode_info(&new, full_path, NULL, 5087 inode->i_sb, xid, NULL); 5088 } 5089 if (!rc) 5090 d_instantiate(dentry, new); 5091 return rc; 5092 } 5093 5094 static int smb2_make_node(unsigned int xid, struct inode *inode, 5095 struct dentry *dentry, struct cifs_tcon *tcon, 5096 const char *full_path, umode_t mode, dev_t dev) 5097 { 5098 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5099 int rc; 5100 5101 /* 5102 * Check if mounted with mount parm 'sfu' mount parm. 5103 * SFU emulation should work with all servers, but only 5104 * supports block and char device (no socket & fifo), 5105 * and was used by default in earlier versions of Windows 5106 */ 5107 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5108 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5109 full_path, mode, dev); 5110 } else { 5111 rc = smb2_mknod_reparse(xid, inode, dentry, tcon, 5112 full_path, mode, dev); 5113 } 5114 return rc; 5115 } 5116 5117 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5118 struct smb_version_operations smb20_operations = { 5119 .compare_fids = smb2_compare_fids, 5120 .setup_request = smb2_setup_request, 5121 .setup_async_request = smb2_setup_async_request, 5122 .check_receive = smb2_check_receive, 5123 .add_credits = smb2_add_credits, 5124 .set_credits = smb2_set_credits, 5125 .get_credits_field = smb2_get_credits_field, 5126 .get_credits = smb2_get_credits, 5127 .wait_mtu_credits = cifs_wait_mtu_credits, 5128 .get_next_mid = smb2_get_next_mid, 5129 .revert_current_mid = smb2_revert_current_mid, 5130 .read_data_offset = smb2_read_data_offset, 5131 .read_data_length = smb2_read_data_length, 5132 .map_error = map_smb2_to_linux_error, 5133 .find_mid = smb2_find_mid, 5134 .check_message = smb2_check_message, 5135 .dump_detail = smb2_dump_detail, 5136 .clear_stats = smb2_clear_stats, 5137 .print_stats = smb2_print_stats, 5138 .is_oplock_break = smb2_is_valid_oplock_break, 5139 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5140 .downgrade_oplock = smb2_downgrade_oplock, 5141 .need_neg = smb2_need_neg, 5142 .negotiate = smb2_negotiate, 5143 .negotiate_wsize = smb2_negotiate_wsize, 5144 .negotiate_rsize = smb2_negotiate_rsize, 5145 .sess_setup = SMB2_sess_setup, 5146 .logoff = SMB2_logoff, 5147 .tree_connect = SMB2_tcon, 5148 .tree_disconnect = SMB2_tdis, 5149 .qfs_tcon = smb2_qfs_tcon, 5150 .is_path_accessible = smb2_is_path_accessible, 5151 .can_echo = smb2_can_echo, 5152 .echo = SMB2_echo, 5153 .query_path_info = smb2_query_path_info, 5154 .query_reparse_point = smb2_query_reparse_point, 5155 .get_srv_inum = smb2_get_srv_inum, 5156 .query_file_info = smb2_query_file_info, 5157 .set_path_size = smb2_set_path_size, 5158 .set_file_size = smb2_set_file_size, 5159 .set_file_info = smb2_set_file_info, 5160 .set_compression = smb2_set_compression, 5161 .mkdir = smb2_mkdir, 5162 .mkdir_setinfo = smb2_mkdir_setinfo, 5163 .rmdir = smb2_rmdir, 5164 .unlink = smb2_unlink, 5165 .rename = smb2_rename_path, 5166 .create_hardlink = smb2_create_hardlink, 5167 .parse_reparse_point = smb2_parse_reparse_point, 5168 .query_mf_symlink = smb3_query_mf_symlink, 5169 .create_mf_symlink = smb3_create_mf_symlink, 5170 .create_reparse_symlink = smb2_create_reparse_symlink, 5171 .open = smb2_open_file, 5172 .set_fid = smb2_set_fid, 5173 .close = smb2_close_file, 5174 .flush = smb2_flush_file, 5175 .async_readv = smb2_async_readv, 5176 .async_writev = smb2_async_writev, 5177 .sync_read = smb2_sync_read, 5178 .sync_write = smb2_sync_write, 5179 .query_dir_first = smb2_query_dir_first, 5180 .query_dir_next = smb2_query_dir_next, 5181 .close_dir = smb2_close_dir, 5182 .calc_smb_size = smb2_calc_size, 5183 .is_status_pending = smb2_is_status_pending, 5184 .is_session_expired = smb2_is_session_expired, 5185 .oplock_response = smb2_oplock_response, 5186 .queryfs = smb2_queryfs, 5187 .mand_lock = smb2_mand_lock, 5188 .mand_unlock_range = smb2_unlock_range, 5189 .push_mand_locks = smb2_push_mandatory_locks, 5190 .get_lease_key = smb2_get_lease_key, 5191 .set_lease_key = smb2_set_lease_key, 5192 .new_lease_key = smb2_new_lease_key, 5193 .calc_signature = smb2_calc_signature, 5194 .is_read_op = smb2_is_read_op, 5195 .set_oplock_level = smb2_set_oplock_level, 5196 .create_lease_buf = smb2_create_lease_buf, 5197 .parse_lease_buf = smb2_parse_lease_buf, 5198 .copychunk_range = smb2_copychunk_range, 5199 .wp_retry_size = smb2_wp_retry_size, 5200 .dir_needs_close = smb2_dir_needs_close, 5201 .get_dfs_refer = smb2_get_dfs_refer, 5202 .select_sectype = smb2_select_sectype, 5203 #ifdef CONFIG_CIFS_XATTR 5204 .query_all_EAs = smb2_query_eas, 5205 .set_EA = smb2_set_ea, 5206 #endif /* CIFS_XATTR */ 5207 .get_acl = get_smb2_acl, 5208 .get_acl_by_fid = get_smb2_acl_by_fid, 5209 .set_acl = set_smb2_acl, 5210 .next_header = smb2_next_header, 5211 .ioctl_query_info = smb2_ioctl_query_info, 5212 .make_node = smb2_make_node, 5213 .fiemap = smb3_fiemap, 5214 .llseek = smb3_llseek, 5215 .is_status_io_timeout = smb2_is_status_io_timeout, 5216 .is_network_name_deleted = smb2_is_network_name_deleted, 5217 }; 5218 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5219 5220 struct smb_version_operations smb21_operations = { 5221 .compare_fids = smb2_compare_fids, 5222 .setup_request = smb2_setup_request, 5223 .setup_async_request = smb2_setup_async_request, 5224 .check_receive = smb2_check_receive, 5225 .add_credits = smb2_add_credits, 5226 .set_credits = smb2_set_credits, 5227 .get_credits_field = smb2_get_credits_field, 5228 .get_credits = smb2_get_credits, 5229 .wait_mtu_credits = smb2_wait_mtu_credits, 5230 .adjust_credits = smb2_adjust_credits, 5231 .get_next_mid = smb2_get_next_mid, 5232 .revert_current_mid = smb2_revert_current_mid, 5233 .read_data_offset = smb2_read_data_offset, 5234 .read_data_length = smb2_read_data_length, 5235 .map_error = map_smb2_to_linux_error, 5236 .find_mid = smb2_find_mid, 5237 .check_message = smb2_check_message, 5238 .dump_detail = smb2_dump_detail, 5239 .clear_stats = smb2_clear_stats, 5240 .print_stats = smb2_print_stats, 5241 .is_oplock_break = smb2_is_valid_oplock_break, 5242 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5243 .downgrade_oplock = smb2_downgrade_oplock, 5244 .need_neg = smb2_need_neg, 5245 .negotiate = smb2_negotiate, 5246 .negotiate_wsize = smb2_negotiate_wsize, 5247 .negotiate_rsize = smb2_negotiate_rsize, 5248 .sess_setup = SMB2_sess_setup, 5249 .logoff = SMB2_logoff, 5250 .tree_connect = SMB2_tcon, 5251 .tree_disconnect = SMB2_tdis, 5252 .qfs_tcon = smb2_qfs_tcon, 5253 .is_path_accessible = smb2_is_path_accessible, 5254 .can_echo = smb2_can_echo, 5255 .echo = SMB2_echo, 5256 .query_path_info = smb2_query_path_info, 5257 .query_reparse_point = smb2_query_reparse_point, 5258 .get_srv_inum = smb2_get_srv_inum, 5259 .query_file_info = smb2_query_file_info, 5260 .set_path_size = smb2_set_path_size, 5261 .set_file_size = smb2_set_file_size, 5262 .set_file_info = smb2_set_file_info, 5263 .set_compression = smb2_set_compression, 5264 .mkdir = smb2_mkdir, 5265 .mkdir_setinfo = smb2_mkdir_setinfo, 5266 .rmdir = smb2_rmdir, 5267 .unlink = smb2_unlink, 5268 .rename = smb2_rename_path, 5269 .create_hardlink = smb2_create_hardlink, 5270 .parse_reparse_point = smb2_parse_reparse_point, 5271 .query_mf_symlink = smb3_query_mf_symlink, 5272 .create_mf_symlink = smb3_create_mf_symlink, 5273 .create_reparse_symlink = smb2_create_reparse_symlink, 5274 .open = smb2_open_file, 5275 .set_fid = smb2_set_fid, 5276 .close = smb2_close_file, 5277 .flush = smb2_flush_file, 5278 .async_readv = smb2_async_readv, 5279 .async_writev = smb2_async_writev, 5280 .sync_read = smb2_sync_read, 5281 .sync_write = smb2_sync_write, 5282 .query_dir_first = smb2_query_dir_first, 5283 .query_dir_next = smb2_query_dir_next, 5284 .close_dir = smb2_close_dir, 5285 .calc_smb_size = smb2_calc_size, 5286 .is_status_pending = smb2_is_status_pending, 5287 .is_session_expired = smb2_is_session_expired, 5288 .oplock_response = smb2_oplock_response, 5289 .queryfs = smb2_queryfs, 5290 .mand_lock = smb2_mand_lock, 5291 .mand_unlock_range = smb2_unlock_range, 5292 .push_mand_locks = smb2_push_mandatory_locks, 5293 .get_lease_key = smb2_get_lease_key, 5294 .set_lease_key = smb2_set_lease_key, 5295 .new_lease_key = smb2_new_lease_key, 5296 .calc_signature = smb2_calc_signature, 5297 .is_read_op = smb21_is_read_op, 5298 .set_oplock_level = smb21_set_oplock_level, 5299 .create_lease_buf = smb2_create_lease_buf, 5300 .parse_lease_buf = smb2_parse_lease_buf, 5301 .copychunk_range = smb2_copychunk_range, 5302 .wp_retry_size = smb2_wp_retry_size, 5303 .dir_needs_close = smb2_dir_needs_close, 5304 .enum_snapshots = smb3_enum_snapshots, 5305 .notify = smb3_notify, 5306 .get_dfs_refer = smb2_get_dfs_refer, 5307 .select_sectype = smb2_select_sectype, 5308 #ifdef CONFIG_CIFS_XATTR 5309 .query_all_EAs = smb2_query_eas, 5310 .set_EA = smb2_set_ea, 5311 #endif /* CIFS_XATTR */ 5312 .get_acl = get_smb2_acl, 5313 .get_acl_by_fid = get_smb2_acl_by_fid, 5314 .set_acl = set_smb2_acl, 5315 .next_header = smb2_next_header, 5316 .ioctl_query_info = smb2_ioctl_query_info, 5317 .make_node = smb2_make_node, 5318 .fiemap = smb3_fiemap, 5319 .llseek = smb3_llseek, 5320 .is_status_io_timeout = smb2_is_status_io_timeout, 5321 .is_network_name_deleted = smb2_is_network_name_deleted, 5322 }; 5323 5324 struct smb_version_operations smb30_operations = { 5325 .compare_fids = smb2_compare_fids, 5326 .setup_request = smb2_setup_request, 5327 .setup_async_request = smb2_setup_async_request, 5328 .check_receive = smb2_check_receive, 5329 .add_credits = smb2_add_credits, 5330 .set_credits = smb2_set_credits, 5331 .get_credits_field = smb2_get_credits_field, 5332 .get_credits = smb2_get_credits, 5333 .wait_mtu_credits = smb2_wait_mtu_credits, 5334 .adjust_credits = smb2_adjust_credits, 5335 .get_next_mid = smb2_get_next_mid, 5336 .revert_current_mid = smb2_revert_current_mid, 5337 .read_data_offset = smb2_read_data_offset, 5338 .read_data_length = smb2_read_data_length, 5339 .map_error = map_smb2_to_linux_error, 5340 .find_mid = smb2_find_mid, 5341 .check_message = smb2_check_message, 5342 .dump_detail = smb2_dump_detail, 5343 .clear_stats = smb2_clear_stats, 5344 .print_stats = smb2_print_stats, 5345 .dump_share_caps = smb2_dump_share_caps, 5346 .is_oplock_break = smb2_is_valid_oplock_break, 5347 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5348 .downgrade_oplock = smb3_downgrade_oplock, 5349 .need_neg = smb2_need_neg, 5350 .negotiate = smb2_negotiate, 5351 .negotiate_wsize = smb3_negotiate_wsize, 5352 .negotiate_rsize = smb3_negotiate_rsize, 5353 .sess_setup = SMB2_sess_setup, 5354 .logoff = SMB2_logoff, 5355 .tree_connect = SMB2_tcon, 5356 .tree_disconnect = SMB2_tdis, 5357 .qfs_tcon = smb3_qfs_tcon, 5358 .query_server_interfaces = SMB3_request_interfaces, 5359 .is_path_accessible = smb2_is_path_accessible, 5360 .can_echo = smb2_can_echo, 5361 .echo = SMB2_echo, 5362 .query_path_info = smb2_query_path_info, 5363 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5364 .query_reparse_point = smb2_query_reparse_point, 5365 .get_srv_inum = smb2_get_srv_inum, 5366 .query_file_info = smb2_query_file_info, 5367 .set_path_size = smb2_set_path_size, 5368 .set_file_size = smb2_set_file_size, 5369 .set_file_info = smb2_set_file_info, 5370 .set_compression = smb2_set_compression, 5371 .mkdir = smb2_mkdir, 5372 .mkdir_setinfo = smb2_mkdir_setinfo, 5373 .rmdir = smb2_rmdir, 5374 .unlink = smb2_unlink, 5375 .rename = smb2_rename_path, 5376 .create_hardlink = smb2_create_hardlink, 5377 .parse_reparse_point = smb2_parse_reparse_point, 5378 .query_mf_symlink = smb3_query_mf_symlink, 5379 .create_mf_symlink = smb3_create_mf_symlink, 5380 .create_reparse_symlink = smb2_create_reparse_symlink, 5381 .open = smb2_open_file, 5382 .set_fid = smb2_set_fid, 5383 .close = smb2_close_file, 5384 .close_getattr = smb2_close_getattr, 5385 .flush = smb2_flush_file, 5386 .async_readv = smb2_async_readv, 5387 .async_writev = smb2_async_writev, 5388 .sync_read = smb2_sync_read, 5389 .sync_write = smb2_sync_write, 5390 .query_dir_first = smb2_query_dir_first, 5391 .query_dir_next = smb2_query_dir_next, 5392 .close_dir = smb2_close_dir, 5393 .calc_smb_size = smb2_calc_size, 5394 .is_status_pending = smb2_is_status_pending, 5395 .is_session_expired = smb2_is_session_expired, 5396 .oplock_response = smb2_oplock_response, 5397 .queryfs = smb2_queryfs, 5398 .mand_lock = smb2_mand_lock, 5399 .mand_unlock_range = smb2_unlock_range, 5400 .push_mand_locks = smb2_push_mandatory_locks, 5401 .get_lease_key = smb2_get_lease_key, 5402 .set_lease_key = smb2_set_lease_key, 5403 .new_lease_key = smb2_new_lease_key, 5404 .generate_signingkey = generate_smb30signingkey, 5405 .calc_signature = smb3_calc_signature, 5406 .set_integrity = smb3_set_integrity, 5407 .is_read_op = smb21_is_read_op, 5408 .set_oplock_level = smb3_set_oplock_level, 5409 .create_lease_buf = smb3_create_lease_buf, 5410 .parse_lease_buf = smb3_parse_lease_buf, 5411 .copychunk_range = smb2_copychunk_range, 5412 .duplicate_extents = smb2_duplicate_extents, 5413 .validate_negotiate = smb3_validate_negotiate, 5414 .wp_retry_size = smb2_wp_retry_size, 5415 .dir_needs_close = smb2_dir_needs_close, 5416 .fallocate = smb3_fallocate, 5417 .enum_snapshots = smb3_enum_snapshots, 5418 .notify = smb3_notify, 5419 .init_transform_rq = smb3_init_transform_rq, 5420 .is_transform_hdr = smb3_is_transform_hdr, 5421 .receive_transform = smb3_receive_transform, 5422 .get_dfs_refer = smb2_get_dfs_refer, 5423 .select_sectype = smb2_select_sectype, 5424 #ifdef CONFIG_CIFS_XATTR 5425 .query_all_EAs = smb2_query_eas, 5426 .set_EA = smb2_set_ea, 5427 #endif /* CIFS_XATTR */ 5428 .get_acl = get_smb2_acl, 5429 .get_acl_by_fid = get_smb2_acl_by_fid, 5430 .set_acl = set_smb2_acl, 5431 .next_header = smb2_next_header, 5432 .ioctl_query_info = smb2_ioctl_query_info, 5433 .make_node = smb2_make_node, 5434 .fiemap = smb3_fiemap, 5435 .llseek = smb3_llseek, 5436 .is_status_io_timeout = smb2_is_status_io_timeout, 5437 .is_network_name_deleted = smb2_is_network_name_deleted, 5438 }; 5439 5440 struct smb_version_operations smb311_operations = { 5441 .compare_fids = smb2_compare_fids, 5442 .setup_request = smb2_setup_request, 5443 .setup_async_request = smb2_setup_async_request, 5444 .check_receive = smb2_check_receive, 5445 .add_credits = smb2_add_credits, 5446 .set_credits = smb2_set_credits, 5447 .get_credits_field = smb2_get_credits_field, 5448 .get_credits = smb2_get_credits, 5449 .wait_mtu_credits = smb2_wait_mtu_credits, 5450 .adjust_credits = smb2_adjust_credits, 5451 .get_next_mid = smb2_get_next_mid, 5452 .revert_current_mid = smb2_revert_current_mid, 5453 .read_data_offset = smb2_read_data_offset, 5454 .read_data_length = smb2_read_data_length, 5455 .map_error = map_smb2_to_linux_error, 5456 .find_mid = smb2_find_mid, 5457 .check_message = smb2_check_message, 5458 .dump_detail = smb2_dump_detail, 5459 .clear_stats = smb2_clear_stats, 5460 .print_stats = smb2_print_stats, 5461 .dump_share_caps = smb2_dump_share_caps, 5462 .is_oplock_break = smb2_is_valid_oplock_break, 5463 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5464 .downgrade_oplock = smb3_downgrade_oplock, 5465 .need_neg = smb2_need_neg, 5466 .negotiate = smb2_negotiate, 5467 .negotiate_wsize = smb3_negotiate_wsize, 5468 .negotiate_rsize = smb3_negotiate_rsize, 5469 .sess_setup = SMB2_sess_setup, 5470 .logoff = SMB2_logoff, 5471 .tree_connect = SMB2_tcon, 5472 .tree_disconnect = SMB2_tdis, 5473 .qfs_tcon = smb3_qfs_tcon, 5474 .query_server_interfaces = SMB3_request_interfaces, 5475 .is_path_accessible = smb2_is_path_accessible, 5476 .can_echo = smb2_can_echo, 5477 .echo = SMB2_echo, 5478 .query_path_info = smb2_query_path_info, 5479 .query_reparse_point = smb2_query_reparse_point, 5480 .get_srv_inum = smb2_get_srv_inum, 5481 .query_file_info = smb2_query_file_info, 5482 .set_path_size = smb2_set_path_size, 5483 .set_file_size = smb2_set_file_size, 5484 .set_file_info = smb2_set_file_info, 5485 .set_compression = smb2_set_compression, 5486 .mkdir = smb2_mkdir, 5487 .mkdir_setinfo = smb2_mkdir_setinfo, 5488 .posix_mkdir = smb311_posix_mkdir, 5489 .rmdir = smb2_rmdir, 5490 .unlink = smb2_unlink, 5491 .rename = smb2_rename_path, 5492 .create_hardlink = smb2_create_hardlink, 5493 .parse_reparse_point = smb2_parse_reparse_point, 5494 .query_mf_symlink = smb3_query_mf_symlink, 5495 .create_mf_symlink = smb3_create_mf_symlink, 5496 .create_reparse_symlink = smb2_create_reparse_symlink, 5497 .open = smb2_open_file, 5498 .set_fid = smb2_set_fid, 5499 .close = smb2_close_file, 5500 .close_getattr = smb2_close_getattr, 5501 .flush = smb2_flush_file, 5502 .async_readv = smb2_async_readv, 5503 .async_writev = smb2_async_writev, 5504 .sync_read = smb2_sync_read, 5505 .sync_write = smb2_sync_write, 5506 .query_dir_first = smb2_query_dir_first, 5507 .query_dir_next = smb2_query_dir_next, 5508 .close_dir = smb2_close_dir, 5509 .calc_smb_size = smb2_calc_size, 5510 .is_status_pending = smb2_is_status_pending, 5511 .is_session_expired = smb2_is_session_expired, 5512 .oplock_response = smb2_oplock_response, 5513 .queryfs = smb311_queryfs, 5514 .mand_lock = smb2_mand_lock, 5515 .mand_unlock_range = smb2_unlock_range, 5516 .push_mand_locks = smb2_push_mandatory_locks, 5517 .get_lease_key = smb2_get_lease_key, 5518 .set_lease_key = smb2_set_lease_key, 5519 .new_lease_key = smb2_new_lease_key, 5520 .generate_signingkey = generate_smb311signingkey, 5521 .calc_signature = smb3_calc_signature, 5522 .set_integrity = smb3_set_integrity, 5523 .is_read_op = smb21_is_read_op, 5524 .set_oplock_level = smb3_set_oplock_level, 5525 .create_lease_buf = smb3_create_lease_buf, 5526 .parse_lease_buf = smb3_parse_lease_buf, 5527 .copychunk_range = smb2_copychunk_range, 5528 .duplicate_extents = smb2_duplicate_extents, 5529 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5530 .wp_retry_size = smb2_wp_retry_size, 5531 .dir_needs_close = smb2_dir_needs_close, 5532 .fallocate = smb3_fallocate, 5533 .enum_snapshots = smb3_enum_snapshots, 5534 .notify = smb3_notify, 5535 .init_transform_rq = smb3_init_transform_rq, 5536 .is_transform_hdr = smb3_is_transform_hdr, 5537 .receive_transform = smb3_receive_transform, 5538 .get_dfs_refer = smb2_get_dfs_refer, 5539 .select_sectype = smb2_select_sectype, 5540 #ifdef CONFIG_CIFS_XATTR 5541 .query_all_EAs = smb2_query_eas, 5542 .set_EA = smb2_set_ea, 5543 #endif /* CIFS_XATTR */ 5544 .get_acl = get_smb2_acl, 5545 .get_acl_by_fid = get_smb2_acl_by_fid, 5546 .set_acl = set_smb2_acl, 5547 .next_header = smb2_next_header, 5548 .ioctl_query_info = smb2_ioctl_query_info, 5549 .make_node = smb2_make_node, 5550 .fiemap = smb3_fiemap, 5551 .llseek = smb3_llseek, 5552 .is_status_io_timeout = smb2_is_status_io_timeout, 5553 .is_network_name_deleted = smb2_is_network_name_deleted, 5554 }; 5555 5556 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5557 struct smb_version_values smb20_values = { 5558 .version_string = SMB20_VERSION_STRING, 5559 .protocol_id = SMB20_PROT_ID, 5560 .req_capabilities = 0, /* MBZ */ 5561 .large_lock_type = 0, 5562 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5563 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5564 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5565 .header_size = sizeof(struct smb2_hdr), 5566 .header_preamble_size = 0, 5567 .max_header_size = MAX_SMB2_HDR_SIZE, 5568 .read_rsp_size = sizeof(struct smb2_read_rsp), 5569 .lock_cmd = SMB2_LOCK, 5570 .cap_unix = 0, 5571 .cap_nt_find = SMB2_NT_FIND, 5572 .cap_large_files = SMB2_LARGE_FILES, 5573 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5574 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5575 .create_lease_size = sizeof(struct create_lease), 5576 }; 5577 #endif /* ALLOW_INSECURE_LEGACY */ 5578 5579 struct smb_version_values smb21_values = { 5580 .version_string = SMB21_VERSION_STRING, 5581 .protocol_id = SMB21_PROT_ID, 5582 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5583 .large_lock_type = 0, 5584 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5585 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5586 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5587 .header_size = sizeof(struct smb2_hdr), 5588 .header_preamble_size = 0, 5589 .max_header_size = MAX_SMB2_HDR_SIZE, 5590 .read_rsp_size = sizeof(struct smb2_read_rsp), 5591 .lock_cmd = SMB2_LOCK, 5592 .cap_unix = 0, 5593 .cap_nt_find = SMB2_NT_FIND, 5594 .cap_large_files = SMB2_LARGE_FILES, 5595 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5596 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5597 .create_lease_size = sizeof(struct create_lease), 5598 }; 5599 5600 struct smb_version_values smb3any_values = { 5601 .version_string = SMB3ANY_VERSION_STRING, 5602 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5603 .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, 5604 .large_lock_type = 0, 5605 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5606 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5607 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5608 .header_size = sizeof(struct smb2_hdr), 5609 .header_preamble_size = 0, 5610 .max_header_size = MAX_SMB2_HDR_SIZE, 5611 .read_rsp_size = sizeof(struct smb2_read_rsp), 5612 .lock_cmd = SMB2_LOCK, 5613 .cap_unix = 0, 5614 .cap_nt_find = SMB2_NT_FIND, 5615 .cap_large_files = SMB2_LARGE_FILES, 5616 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5617 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5618 .create_lease_size = sizeof(struct create_lease_v2), 5619 }; 5620 5621 struct smb_version_values smbdefault_values = { 5622 .version_string = SMBDEFAULT_VERSION_STRING, 5623 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5624 .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, 5625 .large_lock_type = 0, 5626 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5627 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5628 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5629 .header_size = sizeof(struct smb2_hdr), 5630 .header_preamble_size = 0, 5631 .max_header_size = MAX_SMB2_HDR_SIZE, 5632 .read_rsp_size = sizeof(struct smb2_read_rsp), 5633 .lock_cmd = SMB2_LOCK, 5634 .cap_unix = 0, 5635 .cap_nt_find = SMB2_NT_FIND, 5636 .cap_large_files = SMB2_LARGE_FILES, 5637 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5638 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5639 .create_lease_size = sizeof(struct create_lease_v2), 5640 }; 5641 5642 struct smb_version_values smb30_values = { 5643 .version_string = SMB30_VERSION_STRING, 5644 .protocol_id = SMB30_PROT_ID, 5645 .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, 5646 .large_lock_type = 0, 5647 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5648 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5649 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5650 .header_size = sizeof(struct smb2_hdr), 5651 .header_preamble_size = 0, 5652 .max_header_size = MAX_SMB2_HDR_SIZE, 5653 .read_rsp_size = sizeof(struct smb2_read_rsp), 5654 .lock_cmd = SMB2_LOCK, 5655 .cap_unix = 0, 5656 .cap_nt_find = SMB2_NT_FIND, 5657 .cap_large_files = SMB2_LARGE_FILES, 5658 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5659 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5660 .create_lease_size = sizeof(struct create_lease_v2), 5661 }; 5662 5663 struct smb_version_values smb302_values = { 5664 .version_string = SMB302_VERSION_STRING, 5665 .protocol_id = SMB302_PROT_ID, 5666 .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, 5667 .large_lock_type = 0, 5668 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5669 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5670 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5671 .header_size = sizeof(struct smb2_hdr), 5672 .header_preamble_size = 0, 5673 .max_header_size = MAX_SMB2_HDR_SIZE, 5674 .read_rsp_size = sizeof(struct smb2_read_rsp), 5675 .lock_cmd = SMB2_LOCK, 5676 .cap_unix = 0, 5677 .cap_nt_find = SMB2_NT_FIND, 5678 .cap_large_files = SMB2_LARGE_FILES, 5679 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5680 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5681 .create_lease_size = sizeof(struct create_lease_v2), 5682 }; 5683 5684 struct smb_version_values smb311_values = { 5685 .version_string = SMB311_VERSION_STRING, 5686 .protocol_id = SMB311_PROT_ID, 5687 .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, 5688 .large_lock_type = 0, 5689 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5690 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5691 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5692 .header_size = sizeof(struct smb2_hdr), 5693 .header_preamble_size = 0, 5694 .max_header_size = MAX_SMB2_HDR_SIZE, 5695 .read_rsp_size = sizeof(struct smb2_read_rsp), 5696 .lock_cmd = SMB2_LOCK, 5697 .cap_unix = 0, 5698 .cap_nt_find = SMB2_NT_FIND, 5699 .cap_large_files = SMB2_LARGE_FILES, 5700 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5701 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5702 .create_lease_size = sizeof(struct create_lease_v2), 5703 }; 5704