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, size_t size, 221 size_t *num, struct cifs_credits *credits) 222 { 223 int rc = 0; 224 unsigned int scredits, in_flight; 225 226 spin_lock(&server->req_lock); 227 while (1) { 228 spin_unlock(&server->req_lock); 229 230 spin_lock(&server->srv_lock); 231 if (server->tcpStatus == CifsExiting) { 232 spin_unlock(&server->srv_lock); 233 return -ENOENT; 234 } 235 spin_unlock(&server->srv_lock); 236 237 spin_lock(&server->req_lock); 238 if (server->credits <= 0) { 239 spin_unlock(&server->req_lock); 240 cifs_num_waiters_inc(server); 241 rc = wait_event_killable(server->request_q, 242 has_credits(server, &server->credits, 1)); 243 cifs_num_waiters_dec(server); 244 if (rc) 245 return rc; 246 spin_lock(&server->req_lock); 247 } else { 248 scredits = server->credits; 249 /* can deadlock with reopen */ 250 if (scredits <= 8) { 251 *num = SMB2_MAX_BUFFER_SIZE; 252 credits->value = 0; 253 credits->instance = 0; 254 break; 255 } 256 257 /* leave some credits for reopen and other ops */ 258 scredits -= 8; 259 *num = min_t(unsigned int, size, 260 scredits * SMB2_MAX_BUFFER_SIZE); 261 262 credits->value = 263 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 264 credits->instance = server->reconnect_instance; 265 server->credits -= credits->value; 266 server->in_flight++; 267 if (server->in_flight > server->max_in_flight) 268 server->max_in_flight = server->in_flight; 269 break; 270 } 271 } 272 scredits = server->credits; 273 in_flight = server->in_flight; 274 spin_unlock(&server->req_lock); 275 276 trace_smb3_wait_credits(server->CurrentMid, 277 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 278 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 279 __func__, credits->value, scredits); 280 281 return rc; 282 } 283 284 static int 285 smb2_adjust_credits(struct TCP_Server_Info *server, 286 struct cifs_credits *credits, 287 const unsigned int payload_size) 288 { 289 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 290 int scredits, in_flight; 291 292 if (!credits->value || credits->value == new_val) 293 return 0; 294 295 if (credits->value < new_val) { 296 trace_smb3_too_many_credits(server->CurrentMid, 297 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 298 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 299 credits->value, new_val); 300 301 return -EOPNOTSUPP; 302 } 303 304 spin_lock(&server->req_lock); 305 306 if (server->reconnect_instance != credits->instance) { 307 scredits = server->credits; 308 in_flight = server->in_flight; 309 spin_unlock(&server->req_lock); 310 311 trace_smb3_reconnect_detected(server->CurrentMid, 312 server->conn_id, server->hostname, scredits, 313 credits->value - new_val, in_flight); 314 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 315 credits->value - new_val); 316 return -EAGAIN; 317 } 318 319 server->credits += credits->value - new_val; 320 scredits = server->credits; 321 in_flight = server->in_flight; 322 spin_unlock(&server->req_lock); 323 wake_up(&server->request_q); 324 325 trace_smb3_adj_credits(server->CurrentMid, 326 server->conn_id, server->hostname, scredits, 327 credits->value - new_val, in_flight); 328 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 329 __func__, credits->value - new_val, scredits); 330 331 credits->value = new_val; 332 333 return 0; 334 } 335 336 static __u64 337 smb2_get_next_mid(struct TCP_Server_Info *server) 338 { 339 __u64 mid; 340 /* for SMB2 we need the current value */ 341 spin_lock(&server->mid_lock); 342 mid = server->CurrentMid++; 343 spin_unlock(&server->mid_lock); 344 return mid; 345 } 346 347 static void 348 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 349 { 350 spin_lock(&server->mid_lock); 351 if (server->CurrentMid >= val) 352 server->CurrentMid -= val; 353 spin_unlock(&server->mid_lock); 354 } 355 356 static struct mid_q_entry * 357 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 358 { 359 struct mid_q_entry *mid; 360 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 361 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 362 363 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 364 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 365 return NULL; 366 } 367 368 spin_lock(&server->mid_lock); 369 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 370 if ((mid->mid == wire_mid) && 371 (mid->mid_state == MID_REQUEST_SUBMITTED) && 372 (mid->command == shdr->Command)) { 373 kref_get(&mid->refcount); 374 if (dequeue) { 375 list_del_init(&mid->qhead); 376 mid->mid_flags |= MID_DELETED; 377 } 378 spin_unlock(&server->mid_lock); 379 return mid; 380 } 381 } 382 spin_unlock(&server->mid_lock); 383 return NULL; 384 } 385 386 static struct mid_q_entry * 387 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 388 { 389 return __smb2_find_mid(server, buf, false); 390 } 391 392 static struct mid_q_entry * 393 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 394 { 395 return __smb2_find_mid(server, buf, true); 396 } 397 398 static void 399 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 400 { 401 #ifdef CONFIG_CIFS_DEBUG2 402 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 403 404 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 405 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 406 shdr->Id.SyncId.ProcessId); 407 if (!server->ops->check_message(buf, server->total_read, server)) { 408 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 409 server->ops->calc_smb_size(buf)); 410 } 411 #endif 412 } 413 414 static bool 415 smb2_need_neg(struct TCP_Server_Info *server) 416 { 417 return server->max_read == 0; 418 } 419 420 static int 421 smb2_negotiate(const unsigned int xid, 422 struct cifs_ses *ses, 423 struct TCP_Server_Info *server) 424 { 425 int rc; 426 427 spin_lock(&server->mid_lock); 428 server->CurrentMid = 0; 429 spin_unlock(&server->mid_lock); 430 rc = SMB2_negotiate(xid, ses, server); 431 /* BB we probably don't need to retry with modern servers */ 432 if (rc == -EAGAIN) 433 rc = -EHOSTDOWN; 434 return rc; 435 } 436 437 static unsigned int 438 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 439 { 440 struct TCP_Server_Info *server = tcon->ses->server; 441 unsigned int wsize; 442 443 /* start with specified wsize, or default */ 444 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 445 wsize = min_t(unsigned int, wsize, server->max_write); 446 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 447 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 448 449 return wsize; 450 } 451 452 static unsigned int 453 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 454 { 455 struct TCP_Server_Info *server = tcon->ses->server; 456 unsigned int wsize; 457 458 /* start with specified wsize, or default */ 459 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 460 wsize = min_t(unsigned int, wsize, server->max_write); 461 #ifdef CONFIG_CIFS_SMB_DIRECT 462 if (server->rdma) { 463 if (server->sign) 464 /* 465 * Account for SMB2 data transfer packet header and 466 * possible encryption header 467 */ 468 wsize = min_t(unsigned int, 469 wsize, 470 server->smbd_conn->max_fragmented_send_size - 471 SMB2_READWRITE_PDU_HEADER_SIZE - 472 sizeof(struct smb2_transform_hdr)); 473 else 474 wsize = min_t(unsigned int, 475 wsize, server->smbd_conn->max_readwrite_size); 476 } 477 #endif 478 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 479 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 480 481 return wsize; 482 } 483 484 static unsigned int 485 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 486 { 487 struct TCP_Server_Info *server = tcon->ses->server; 488 unsigned int rsize; 489 490 /* start with specified rsize, or default */ 491 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 492 rsize = min_t(unsigned int, rsize, server->max_read); 493 494 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 495 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 496 497 return rsize; 498 } 499 500 static unsigned int 501 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 502 { 503 struct TCP_Server_Info *server = tcon->ses->server; 504 unsigned int rsize; 505 506 /* start with specified rsize, or default */ 507 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 508 rsize = min_t(unsigned int, rsize, server->max_read); 509 #ifdef CONFIG_CIFS_SMB_DIRECT 510 if (server->rdma) { 511 if (server->sign) 512 /* 513 * Account for SMB2 data transfer packet header and 514 * possible encryption header 515 */ 516 rsize = min_t(unsigned int, 517 rsize, 518 server->smbd_conn->max_fragmented_recv_size - 519 SMB2_READWRITE_PDU_HEADER_SIZE - 520 sizeof(struct smb2_transform_hdr)); 521 else 522 rsize = min_t(unsigned int, 523 rsize, server->smbd_conn->max_readwrite_size); 524 } 525 #endif 526 527 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 528 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 529 530 return rsize; 531 } 532 533 /* 534 * compare two interfaces a and b 535 * return 0 if everything matches. 536 * return 1 if a is rdma capable, or rss capable, or has higher link speed 537 * return -1 otherwise. 538 */ 539 static int 540 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 541 { 542 int cmp_ret = 0; 543 544 WARN_ON(!a || !b); 545 if (a->rdma_capable == b->rdma_capable) { 546 if (a->rss_capable == b->rss_capable) { 547 if (a->speed == b->speed) { 548 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 549 (struct sockaddr *) &b->sockaddr); 550 if (!cmp_ret) 551 return 0; 552 else if (cmp_ret > 0) 553 return 1; 554 else 555 return -1; 556 } else if (a->speed > b->speed) 557 return 1; 558 else 559 return -1; 560 } else if (a->rss_capable > b->rss_capable) 561 return 1; 562 else 563 return -1; 564 } else if (a->rdma_capable > b->rdma_capable) 565 return 1; 566 else 567 return -1; 568 } 569 570 static int 571 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 572 size_t buf_len, struct cifs_ses *ses, bool in_mount) 573 { 574 struct network_interface_info_ioctl_rsp *p; 575 struct sockaddr_in *addr4; 576 struct sockaddr_in6 *addr6; 577 struct iface_info_ipv4 *p4; 578 struct iface_info_ipv6 *p6; 579 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 580 struct cifs_server_iface tmp_iface; 581 ssize_t bytes_left; 582 size_t next = 0; 583 int nb_iface = 0; 584 int rc = 0, ret = 0; 585 586 bytes_left = buf_len; 587 p = buf; 588 589 spin_lock(&ses->iface_lock); 590 /* do not query too frequently, this time with lock held */ 591 if (ses->iface_last_update && 592 time_before(jiffies, ses->iface_last_update + 593 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 594 spin_unlock(&ses->iface_lock); 595 return 0; 596 } 597 598 /* 599 * Go through iface_list and mark them as inactive 600 */ 601 list_for_each_entry_safe(iface, niface, &ses->iface_list, 602 iface_head) 603 iface->is_active = 0; 604 605 spin_unlock(&ses->iface_lock); 606 607 /* 608 * Samba server e.g. can return an empty interface list in some cases, 609 * which would only be a problem if we were requesting multichannel 610 */ 611 if (bytes_left == 0) { 612 /* avoid spamming logs every 10 minutes, so log only in mount */ 613 if ((ses->chan_max > 1) && in_mount) 614 cifs_dbg(VFS, 615 "multichannel not available\n" 616 "Empty network interface list returned by server %s\n", 617 ses->server->hostname); 618 rc = -EOPNOTSUPP; 619 ses->iface_last_update = jiffies; 620 goto out; 621 } 622 623 while (bytes_left >= (ssize_t)sizeof(*p)) { 624 memset(&tmp_iface, 0, sizeof(tmp_iface)); 625 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 626 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 627 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 628 629 switch (p->Family) { 630 /* 631 * The kernel and wire socket structures have the same 632 * layout and use network byte order but make the 633 * conversion explicit in case either one changes. 634 */ 635 case INTERNETWORK: 636 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 637 p4 = (struct iface_info_ipv4 *)p->Buffer; 638 addr4->sin_family = AF_INET; 639 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 640 641 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 642 addr4->sin_port = cpu_to_be16(CIFS_PORT); 643 644 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 645 &addr4->sin_addr); 646 break; 647 case INTERNETWORKV6: 648 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 649 p6 = (struct iface_info_ipv6 *)p->Buffer; 650 addr6->sin6_family = AF_INET6; 651 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 652 653 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 654 addr6->sin6_flowinfo = 0; 655 addr6->sin6_scope_id = 0; 656 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 657 658 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 659 &addr6->sin6_addr); 660 break; 661 default: 662 cifs_dbg(VFS, 663 "%s: skipping unsupported socket family\n", 664 __func__); 665 goto next_iface; 666 } 667 668 /* 669 * The iface_list is assumed to be sorted by speed. 670 * Check if the new interface exists in that list. 671 * NEVER change iface. it could be in use. 672 * Add a new one instead 673 */ 674 spin_lock(&ses->iface_lock); 675 list_for_each_entry_safe(iface, niface, &ses->iface_list, 676 iface_head) { 677 ret = iface_cmp(iface, &tmp_iface); 678 if (!ret) { 679 iface->is_active = 1; 680 spin_unlock(&ses->iface_lock); 681 goto next_iface; 682 } else if (ret < 0) { 683 /* all remaining ifaces are slower */ 684 kref_get(&iface->refcount); 685 break; 686 } 687 } 688 spin_unlock(&ses->iface_lock); 689 690 /* no match. insert the entry in the list */ 691 info = kmalloc(sizeof(struct cifs_server_iface), 692 GFP_KERNEL); 693 if (!info) { 694 rc = -ENOMEM; 695 goto out; 696 } 697 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 698 699 /* add this new entry to the list */ 700 kref_init(&info->refcount); 701 info->is_active = 1; 702 703 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 704 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 705 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 706 le32_to_cpu(p->Capability)); 707 708 spin_lock(&ses->iface_lock); 709 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 710 list_add_tail(&info->iface_head, &iface->iface_head); 711 kref_put(&iface->refcount, release_iface); 712 } else 713 list_add_tail(&info->iface_head, &ses->iface_list); 714 715 ses->iface_count++; 716 spin_unlock(&ses->iface_lock); 717 next_iface: 718 nb_iface++; 719 next = le32_to_cpu(p->Next); 720 if (!next) { 721 bytes_left -= sizeof(*p); 722 break; 723 } 724 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 725 bytes_left -= next; 726 } 727 728 if (!nb_iface) { 729 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 730 rc = -EINVAL; 731 goto out; 732 } 733 734 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 735 if ((bytes_left > 8) || p->Next) 736 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 737 738 ses->iface_last_update = jiffies; 739 740 out: 741 /* 742 * Go through the list again and put the inactive entries 743 */ 744 spin_lock(&ses->iface_lock); 745 list_for_each_entry_safe(iface, niface, &ses->iface_list, 746 iface_head) { 747 if (!iface->is_active) { 748 list_del(&iface->iface_head); 749 kref_put(&iface->refcount, release_iface); 750 ses->iface_count--; 751 } 752 } 753 spin_unlock(&ses->iface_lock); 754 755 return rc; 756 } 757 758 int 759 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 760 { 761 int rc; 762 unsigned int ret_data_len = 0; 763 struct network_interface_info_ioctl_rsp *out_buf = NULL; 764 struct cifs_ses *ses = tcon->ses; 765 struct TCP_Server_Info *pserver; 766 767 /* do not query too frequently */ 768 if (ses->iface_last_update && 769 time_before(jiffies, ses->iface_last_update + 770 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 771 return 0; 772 773 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 774 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 775 NULL /* no data input */, 0 /* no data input */, 776 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 777 if (rc == -EOPNOTSUPP) { 778 cifs_dbg(FYI, 779 "server does not support query network interfaces\n"); 780 ret_data_len = 0; 781 } else if (rc != 0) { 782 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 783 goto out; 784 } 785 786 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 787 if (rc) 788 goto out; 789 790 /* check if iface is still active */ 791 spin_lock(&ses->chan_lock); 792 pserver = ses->chans[0].server; 793 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { 794 spin_unlock(&ses->chan_lock); 795 cifs_chan_update_iface(ses, pserver); 796 spin_lock(&ses->chan_lock); 797 } 798 spin_unlock(&ses->chan_lock); 799 800 out: 801 kfree(out_buf); 802 return rc; 803 } 804 805 static void 806 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 807 struct cifs_sb_info *cifs_sb) 808 { 809 int rc; 810 __le16 srch_path = 0; /* Null - open root of share */ 811 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 812 struct cifs_open_parms oparms; 813 struct cifs_fid fid; 814 struct cached_fid *cfid = NULL; 815 816 oparms = (struct cifs_open_parms) { 817 .tcon = tcon, 818 .path = "", 819 .desired_access = FILE_READ_ATTRIBUTES, 820 .disposition = FILE_OPEN, 821 .create_options = cifs_create_options(cifs_sb, 0), 822 .fid = &fid, 823 }; 824 825 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 826 if (rc == 0) 827 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 828 else 829 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 830 NULL, NULL); 831 if (rc) 832 return; 833 834 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 835 836 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 837 FS_ATTRIBUTE_INFORMATION); 838 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 839 FS_DEVICE_INFORMATION); 840 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 841 FS_VOLUME_INFORMATION); 842 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 843 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 844 if (cfid == NULL) 845 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 846 else 847 close_cached_dir(cfid); 848 } 849 850 static void 851 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 852 struct cifs_sb_info *cifs_sb) 853 { 854 int rc; 855 __le16 srch_path = 0; /* Null - open root of share */ 856 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 857 struct cifs_open_parms oparms; 858 struct cifs_fid fid; 859 860 oparms = (struct cifs_open_parms) { 861 .tcon = tcon, 862 .path = "", 863 .desired_access = FILE_READ_ATTRIBUTES, 864 .disposition = FILE_OPEN, 865 .create_options = cifs_create_options(cifs_sb, 0), 866 .fid = &fid, 867 }; 868 869 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 870 NULL, NULL); 871 if (rc) 872 return; 873 874 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 875 FS_ATTRIBUTE_INFORMATION); 876 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 877 FS_DEVICE_INFORMATION); 878 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 879 } 880 881 static int 882 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 883 struct cifs_sb_info *cifs_sb, const char *full_path) 884 { 885 __le16 *utf16_path; 886 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 887 int err_buftype = CIFS_NO_BUFFER; 888 struct cifs_open_parms oparms; 889 struct kvec err_iov = {}; 890 struct cifs_fid fid; 891 struct cached_fid *cfid; 892 bool islink; 893 int rc, rc2; 894 895 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 896 if (!rc) { 897 if (cfid->has_lease) { 898 close_cached_dir(cfid); 899 return 0; 900 } 901 close_cached_dir(cfid); 902 } 903 904 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 905 if (!utf16_path) 906 return -ENOMEM; 907 908 oparms = (struct cifs_open_parms) { 909 .tcon = tcon, 910 .path = full_path, 911 .desired_access = FILE_READ_ATTRIBUTES, 912 .disposition = FILE_OPEN, 913 .create_options = cifs_create_options(cifs_sb, 0), 914 .fid = &fid, 915 }; 916 917 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 918 &err_iov, &err_buftype); 919 if (rc) { 920 struct smb2_hdr *hdr = err_iov.iov_base; 921 922 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 923 goto out; 924 925 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 926 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 927 full_path, &islink); 928 if (rc2) { 929 rc = rc2; 930 goto out; 931 } 932 if (islink) 933 rc = -EREMOTE; 934 } 935 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 936 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 937 rc = -EOPNOTSUPP; 938 goto out; 939 } 940 941 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 942 943 out: 944 free_rsp_buf(err_buftype, err_iov.iov_base); 945 kfree(utf16_path); 946 return rc; 947 } 948 949 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 950 struct cifs_sb_info *cifs_sb, const char *full_path, 951 u64 *uniqueid, struct cifs_open_info_data *data) 952 { 953 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 954 return 0; 955 } 956 957 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 958 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 959 { 960 struct cifs_fid *fid = &cfile->fid; 961 962 if (cfile->symlink_target) { 963 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 964 if (!data->symlink_target) 965 return -ENOMEM; 966 } 967 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 968 } 969 970 #ifdef CONFIG_CIFS_XATTR 971 static ssize_t 972 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 973 struct smb2_file_full_ea_info *src, size_t src_size, 974 const unsigned char *ea_name) 975 { 976 int rc = 0; 977 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 978 char *name, *value; 979 size_t buf_size = dst_size; 980 size_t name_len, value_len, user_name_len; 981 982 while (src_size > 0) { 983 name_len = (size_t)src->ea_name_length; 984 value_len = (size_t)le16_to_cpu(src->ea_value_length); 985 986 if (name_len == 0) 987 break; 988 989 if (src_size < 8 + name_len + 1 + value_len) { 990 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 991 rc = -EIO; 992 goto out; 993 } 994 995 name = &src->ea_data[0]; 996 value = &src->ea_data[src->ea_name_length + 1]; 997 998 if (ea_name) { 999 if (ea_name_len == name_len && 1000 memcmp(ea_name, name, name_len) == 0) { 1001 rc = value_len; 1002 if (dst_size == 0) 1003 goto out; 1004 if (dst_size < value_len) { 1005 rc = -ERANGE; 1006 goto out; 1007 } 1008 memcpy(dst, value, value_len); 1009 goto out; 1010 } 1011 } else { 1012 /* 'user.' plus a terminating null */ 1013 user_name_len = 5 + 1 + name_len; 1014 1015 if (buf_size == 0) { 1016 /* skip copy - calc size only */ 1017 rc += user_name_len; 1018 } else if (dst_size >= user_name_len) { 1019 dst_size -= user_name_len; 1020 memcpy(dst, "user.", 5); 1021 dst += 5; 1022 memcpy(dst, src->ea_data, name_len); 1023 dst += name_len; 1024 *dst = 0; 1025 ++dst; 1026 rc += user_name_len; 1027 } else { 1028 /* stop before overrun buffer */ 1029 rc = -ERANGE; 1030 break; 1031 } 1032 } 1033 1034 if (!src->next_entry_offset) 1035 break; 1036 1037 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1038 /* stop before overrun buffer */ 1039 rc = -ERANGE; 1040 break; 1041 } 1042 src_size -= le32_to_cpu(src->next_entry_offset); 1043 src = (void *)((char *)src + 1044 le32_to_cpu(src->next_entry_offset)); 1045 } 1046 1047 /* didn't find the named attribute */ 1048 if (ea_name) 1049 rc = -ENODATA; 1050 1051 out: 1052 return (ssize_t)rc; 1053 } 1054 1055 static ssize_t 1056 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1057 const unsigned char *path, const unsigned char *ea_name, 1058 char *ea_data, size_t buf_size, 1059 struct cifs_sb_info *cifs_sb) 1060 { 1061 int rc; 1062 struct kvec rsp_iov = {NULL, 0}; 1063 int buftype = CIFS_NO_BUFFER; 1064 struct smb2_query_info_rsp *rsp; 1065 struct smb2_file_full_ea_info *info = NULL; 1066 1067 rc = smb2_query_info_compound(xid, tcon, path, 1068 FILE_READ_EA, 1069 FILE_FULL_EA_INFORMATION, 1070 SMB2_O_INFO_FILE, 1071 CIFSMaxBufSize - 1072 MAX_SMB2_CREATE_RESPONSE_SIZE - 1073 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1074 &rsp_iov, &buftype, cifs_sb); 1075 if (rc) { 1076 /* 1077 * If ea_name is NULL (listxattr) and there are no EAs, 1078 * return 0 as it's not an error. Otherwise, the specified 1079 * ea_name was not found. 1080 */ 1081 if (!ea_name && rc == -ENODATA) 1082 rc = 0; 1083 goto qeas_exit; 1084 } 1085 1086 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1087 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1088 le32_to_cpu(rsp->OutputBufferLength), 1089 &rsp_iov, 1090 sizeof(struct smb2_file_full_ea_info)); 1091 if (rc) 1092 goto qeas_exit; 1093 1094 info = (struct smb2_file_full_ea_info *)( 1095 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1096 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1097 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1098 1099 qeas_exit: 1100 free_rsp_buf(buftype, rsp_iov.iov_base); 1101 return rc; 1102 } 1103 1104 static int 1105 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1106 const char *path, const char *ea_name, const void *ea_value, 1107 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1108 struct cifs_sb_info *cifs_sb) 1109 { 1110 struct smb2_compound_vars *vars; 1111 struct cifs_ses *ses = tcon->ses; 1112 struct TCP_Server_Info *server; 1113 struct smb_rqst *rqst; 1114 struct kvec *rsp_iov; 1115 __le16 *utf16_path = NULL; 1116 int ea_name_len = strlen(ea_name); 1117 int flags = CIFS_CP_CREATE_CLOSE_OP; 1118 int len; 1119 int resp_buftype[3]; 1120 struct cifs_open_parms oparms; 1121 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1122 struct cifs_fid fid; 1123 unsigned int size[1]; 1124 void *data[1]; 1125 struct smb2_file_full_ea_info *ea = NULL; 1126 struct smb2_query_info_rsp *rsp; 1127 int rc, used_len = 0; 1128 int retries = 0, cur_sleep = 1; 1129 1130 replay_again: 1131 /* reinitialize for possible replay */ 1132 flags = CIFS_CP_CREATE_CLOSE_OP; 1133 oplock = SMB2_OPLOCK_LEVEL_NONE; 1134 server = cifs_pick_channel(ses); 1135 1136 if (smb3_encryption_required(tcon)) 1137 flags |= CIFS_TRANSFORM_REQ; 1138 1139 if (ea_name_len > 255) 1140 return -EINVAL; 1141 1142 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1143 if (!utf16_path) 1144 return -ENOMEM; 1145 1146 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1147 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1148 if (!vars) { 1149 rc = -ENOMEM; 1150 goto out_free_path; 1151 } 1152 rqst = vars->rqst; 1153 rsp_iov = vars->rsp_iov; 1154 1155 if (ses->server->ops->query_all_EAs) { 1156 if (!ea_value) { 1157 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1158 ea_name, NULL, 0, 1159 cifs_sb); 1160 if (rc == -ENODATA) 1161 goto sea_exit; 1162 } else { 1163 /* If we are adding a attribute we should first check 1164 * if there will be enough space available to store 1165 * the new EA. If not we should not add it since we 1166 * would not be able to even read the EAs back. 1167 */ 1168 rc = smb2_query_info_compound(xid, tcon, path, 1169 FILE_READ_EA, 1170 FILE_FULL_EA_INFORMATION, 1171 SMB2_O_INFO_FILE, 1172 CIFSMaxBufSize - 1173 MAX_SMB2_CREATE_RESPONSE_SIZE - 1174 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1175 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1176 if (rc == 0) { 1177 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1178 used_len = le32_to_cpu(rsp->OutputBufferLength); 1179 } 1180 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1181 resp_buftype[1] = CIFS_NO_BUFFER; 1182 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1183 rc = 0; 1184 1185 /* Use a fudge factor of 256 bytes in case we collide 1186 * with a different set_EAs command. 1187 */ 1188 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1189 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1190 used_len + ea_name_len + ea_value_len + 1) { 1191 rc = -ENOSPC; 1192 goto sea_exit; 1193 } 1194 } 1195 } 1196 1197 /* Open */ 1198 rqst[0].rq_iov = vars->open_iov; 1199 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1200 1201 oparms = (struct cifs_open_parms) { 1202 .tcon = tcon, 1203 .path = path, 1204 .desired_access = FILE_WRITE_EA, 1205 .disposition = FILE_OPEN, 1206 .create_options = cifs_create_options(cifs_sb, 0), 1207 .fid = &fid, 1208 .replay = !!(retries), 1209 }; 1210 1211 rc = SMB2_open_init(tcon, server, 1212 &rqst[0], &oplock, &oparms, utf16_path); 1213 if (rc) 1214 goto sea_exit; 1215 smb2_set_next_command(tcon, &rqst[0]); 1216 1217 1218 /* Set Info */ 1219 rqst[1].rq_iov = vars->si_iov; 1220 rqst[1].rq_nvec = 1; 1221 1222 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1223 ea = kzalloc(len, GFP_KERNEL); 1224 if (ea == NULL) { 1225 rc = -ENOMEM; 1226 goto sea_exit; 1227 } 1228 1229 ea->ea_name_length = ea_name_len; 1230 ea->ea_value_length = cpu_to_le16(ea_value_len); 1231 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1232 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1233 1234 size[0] = len; 1235 data[0] = ea; 1236 1237 rc = SMB2_set_info_init(tcon, server, 1238 &rqst[1], COMPOUND_FID, 1239 COMPOUND_FID, current->tgid, 1240 FILE_FULL_EA_INFORMATION, 1241 SMB2_O_INFO_FILE, 0, data, size); 1242 if (rc) 1243 goto sea_exit; 1244 smb2_set_next_command(tcon, &rqst[1]); 1245 smb2_set_related(&rqst[1]); 1246 1247 /* Close */ 1248 rqst[2].rq_iov = &vars->close_iov; 1249 rqst[2].rq_nvec = 1; 1250 rc = SMB2_close_init(tcon, server, 1251 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1252 if (rc) 1253 goto sea_exit; 1254 smb2_set_related(&rqst[2]); 1255 1256 if (retries) { 1257 smb2_set_replay(server, &rqst[0]); 1258 smb2_set_replay(server, &rqst[1]); 1259 smb2_set_replay(server, &rqst[2]); 1260 } 1261 1262 rc = compound_send_recv(xid, ses, server, 1263 flags, 3, rqst, 1264 resp_buftype, rsp_iov); 1265 /* no need to bump num_remote_opens because handle immediately closed */ 1266 1267 sea_exit: 1268 kfree(ea); 1269 SMB2_open_free(&rqst[0]); 1270 SMB2_set_info_free(&rqst[1]); 1271 SMB2_close_free(&rqst[2]); 1272 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1273 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1274 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1275 kfree(vars); 1276 out_free_path: 1277 kfree(utf16_path); 1278 1279 if (is_replayable_error(rc) && 1280 smb2_should_replay(tcon, &retries, &cur_sleep)) 1281 goto replay_again; 1282 1283 return rc; 1284 } 1285 #endif 1286 1287 static bool 1288 smb2_can_echo(struct TCP_Server_Info *server) 1289 { 1290 return server->echoes; 1291 } 1292 1293 static void 1294 smb2_clear_stats(struct cifs_tcon *tcon) 1295 { 1296 int i; 1297 1298 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1299 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1300 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1301 } 1302 } 1303 1304 static void 1305 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1306 { 1307 seq_puts(m, "\n\tShare Capabilities:"); 1308 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1309 seq_puts(m, " DFS,"); 1310 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1311 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1312 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1313 seq_puts(m, " SCALEOUT,"); 1314 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1315 seq_puts(m, " CLUSTER,"); 1316 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1317 seq_puts(m, " ASYMMETRIC,"); 1318 if (tcon->capabilities == 0) 1319 seq_puts(m, " None"); 1320 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1321 seq_puts(m, " Aligned,"); 1322 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1323 seq_puts(m, " Partition Aligned,"); 1324 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1325 seq_puts(m, " SSD,"); 1326 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1327 seq_puts(m, " TRIM-support,"); 1328 1329 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1330 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1331 if (tcon->perf_sector_size) 1332 seq_printf(m, "\tOptimal sector size: 0x%x", 1333 tcon->perf_sector_size); 1334 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1335 } 1336 1337 static void 1338 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1339 { 1340 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1341 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1342 1343 /* 1344 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1345 * totals (requests sent) since those SMBs are per-session not per tcon 1346 */ 1347 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1348 (long long)(tcon->bytes_read), 1349 (long long)(tcon->bytes_written)); 1350 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1351 atomic_read(&tcon->num_local_opens), 1352 atomic_read(&tcon->num_remote_opens)); 1353 seq_printf(m, "\nTreeConnects: %d total %d failed", 1354 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1355 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1356 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1357 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1358 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1359 seq_printf(m, "\nCreates: %d total %d failed", 1360 atomic_read(&sent[SMB2_CREATE_HE]), 1361 atomic_read(&failed[SMB2_CREATE_HE])); 1362 seq_printf(m, "\nCloses: %d total %d failed", 1363 atomic_read(&sent[SMB2_CLOSE_HE]), 1364 atomic_read(&failed[SMB2_CLOSE_HE])); 1365 seq_printf(m, "\nFlushes: %d total %d failed", 1366 atomic_read(&sent[SMB2_FLUSH_HE]), 1367 atomic_read(&failed[SMB2_FLUSH_HE])); 1368 seq_printf(m, "\nReads: %d total %d failed", 1369 atomic_read(&sent[SMB2_READ_HE]), 1370 atomic_read(&failed[SMB2_READ_HE])); 1371 seq_printf(m, "\nWrites: %d total %d failed", 1372 atomic_read(&sent[SMB2_WRITE_HE]), 1373 atomic_read(&failed[SMB2_WRITE_HE])); 1374 seq_printf(m, "\nLocks: %d total %d failed", 1375 atomic_read(&sent[SMB2_LOCK_HE]), 1376 atomic_read(&failed[SMB2_LOCK_HE])); 1377 seq_printf(m, "\nIOCTLs: %d total %d failed", 1378 atomic_read(&sent[SMB2_IOCTL_HE]), 1379 atomic_read(&failed[SMB2_IOCTL_HE])); 1380 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1381 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1382 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1383 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1384 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1385 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1386 seq_printf(m, "\nQueryInfos: %d total %d failed", 1387 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1388 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1389 seq_printf(m, "\nSetInfos: %d total %d failed", 1390 atomic_read(&sent[SMB2_SET_INFO_HE]), 1391 atomic_read(&failed[SMB2_SET_INFO_HE])); 1392 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1393 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1394 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1395 } 1396 1397 static void 1398 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1399 { 1400 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1401 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1402 1403 cfile->fid.persistent_fid = fid->persistent_fid; 1404 cfile->fid.volatile_fid = fid->volatile_fid; 1405 cfile->fid.access = fid->access; 1406 #ifdef CONFIG_CIFS_DEBUG2 1407 cfile->fid.mid = fid->mid; 1408 #endif /* CIFS_DEBUG2 */ 1409 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1410 &fid->purge_cache); 1411 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1412 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1413 } 1414 1415 static int 1416 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1417 struct cifs_fid *fid) 1418 { 1419 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1420 } 1421 1422 static int 1423 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1424 struct cifsFileInfo *cfile) 1425 { 1426 struct smb2_file_network_open_info file_inf; 1427 struct inode *inode; 1428 int rc; 1429 1430 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1431 cfile->fid.volatile_fid, &file_inf); 1432 if (rc) 1433 return rc; 1434 1435 inode = d_inode(cfile->dentry); 1436 1437 spin_lock(&inode->i_lock); 1438 CIFS_I(inode)->time = jiffies; 1439 1440 /* Creation time should not need to be updated on close */ 1441 if (file_inf.LastWriteTime) 1442 inode_set_mtime_to_ts(inode, 1443 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1444 if (file_inf.ChangeTime) 1445 inode_set_ctime_to_ts(inode, 1446 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1447 if (file_inf.LastAccessTime) 1448 inode_set_atime_to_ts(inode, 1449 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1450 1451 /* 1452 * i_blocks is not related to (i_size / i_blksize), 1453 * but instead 512 byte (2**9) size is required for 1454 * calculating num blocks. 1455 */ 1456 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1457 inode->i_blocks = 1458 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1459 1460 /* End of file and Attributes should not have to be updated on close */ 1461 spin_unlock(&inode->i_lock); 1462 return rc; 1463 } 1464 1465 static int 1466 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1467 u64 persistent_fid, u64 volatile_fid, 1468 struct copychunk_ioctl *pcchunk) 1469 { 1470 int rc; 1471 unsigned int ret_data_len; 1472 struct resume_key_req *res_key; 1473 1474 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1475 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1476 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1477 1478 if (rc == -EOPNOTSUPP) { 1479 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1480 goto req_res_key_exit; 1481 } else if (rc) { 1482 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1483 goto req_res_key_exit; 1484 } 1485 if (ret_data_len < sizeof(struct resume_key_req)) { 1486 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1487 rc = -EINVAL; 1488 goto req_res_key_exit; 1489 } 1490 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1491 1492 req_res_key_exit: 1493 kfree(res_key); 1494 return rc; 1495 } 1496 1497 static int 1498 smb2_ioctl_query_info(const unsigned int xid, 1499 struct cifs_tcon *tcon, 1500 struct cifs_sb_info *cifs_sb, 1501 __le16 *path, int is_dir, 1502 unsigned long p) 1503 { 1504 struct smb2_compound_vars *vars; 1505 struct smb_rqst *rqst; 1506 struct kvec *rsp_iov; 1507 struct cifs_ses *ses = tcon->ses; 1508 struct TCP_Server_Info *server; 1509 char __user *arg = (char __user *)p; 1510 struct smb_query_info qi; 1511 struct smb_query_info __user *pqi; 1512 int rc = 0; 1513 int flags = CIFS_CP_CREATE_CLOSE_OP; 1514 struct smb2_query_info_rsp *qi_rsp = NULL; 1515 struct smb2_ioctl_rsp *io_rsp = NULL; 1516 void *buffer = NULL; 1517 int resp_buftype[3]; 1518 struct cifs_open_parms oparms; 1519 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1520 struct cifs_fid fid; 1521 unsigned int size[2]; 1522 void *data[2]; 1523 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1524 void (*free_req1_func)(struct smb_rqst *r); 1525 int retries = 0, cur_sleep = 1; 1526 1527 replay_again: 1528 /* reinitialize for possible replay */ 1529 flags = CIFS_CP_CREATE_CLOSE_OP; 1530 oplock = SMB2_OPLOCK_LEVEL_NONE; 1531 server = cifs_pick_channel(ses); 1532 1533 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1534 if (vars == NULL) 1535 return -ENOMEM; 1536 rqst = &vars->rqst[0]; 1537 rsp_iov = &vars->rsp_iov[0]; 1538 1539 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1540 1541 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1542 rc = -EFAULT; 1543 goto free_vars; 1544 } 1545 if (qi.output_buffer_length > 1024) { 1546 rc = -EINVAL; 1547 goto free_vars; 1548 } 1549 1550 if (!ses || !server) { 1551 rc = -EIO; 1552 goto free_vars; 1553 } 1554 1555 if (smb3_encryption_required(tcon)) 1556 flags |= CIFS_TRANSFORM_REQ; 1557 1558 if (qi.output_buffer_length) { 1559 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1560 if (IS_ERR(buffer)) { 1561 rc = PTR_ERR(buffer); 1562 goto free_vars; 1563 } 1564 } 1565 1566 /* Open */ 1567 rqst[0].rq_iov = &vars->open_iov[0]; 1568 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1569 1570 oparms = (struct cifs_open_parms) { 1571 .tcon = tcon, 1572 .disposition = FILE_OPEN, 1573 .create_options = cifs_create_options(cifs_sb, create_options), 1574 .fid = &fid, 1575 .replay = !!(retries), 1576 }; 1577 1578 if (qi.flags & PASSTHRU_FSCTL) { 1579 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1580 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1581 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1582 break; 1583 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1584 oparms.desired_access = GENERIC_ALL; 1585 break; 1586 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1587 oparms.desired_access = GENERIC_READ; 1588 break; 1589 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1590 oparms.desired_access = GENERIC_WRITE; 1591 break; 1592 } 1593 } else if (qi.flags & PASSTHRU_SET_INFO) { 1594 oparms.desired_access = GENERIC_WRITE; 1595 } else { 1596 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1597 } 1598 1599 rc = SMB2_open_init(tcon, server, 1600 &rqst[0], &oplock, &oparms, path); 1601 if (rc) 1602 goto free_output_buffer; 1603 smb2_set_next_command(tcon, &rqst[0]); 1604 1605 /* Query */ 1606 if (qi.flags & PASSTHRU_FSCTL) { 1607 /* Can eventually relax perm check since server enforces too */ 1608 if (!capable(CAP_SYS_ADMIN)) { 1609 rc = -EPERM; 1610 goto free_open_req; 1611 } 1612 rqst[1].rq_iov = &vars->io_iov[0]; 1613 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1614 1615 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1616 qi.info_type, buffer, qi.output_buffer_length, 1617 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1618 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1619 free_req1_func = SMB2_ioctl_free; 1620 } else if (qi.flags == PASSTHRU_SET_INFO) { 1621 /* Can eventually relax perm check since server enforces too */ 1622 if (!capable(CAP_SYS_ADMIN)) { 1623 rc = -EPERM; 1624 goto free_open_req; 1625 } 1626 if (qi.output_buffer_length < 8) { 1627 rc = -EINVAL; 1628 goto free_open_req; 1629 } 1630 rqst[1].rq_iov = vars->si_iov; 1631 rqst[1].rq_nvec = 1; 1632 1633 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1634 size[0] = 8; 1635 data[0] = buffer; 1636 1637 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1638 current->tgid, FILE_END_OF_FILE_INFORMATION, 1639 SMB2_O_INFO_FILE, 0, data, size); 1640 free_req1_func = SMB2_set_info_free; 1641 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1642 rqst[1].rq_iov = &vars->qi_iov; 1643 rqst[1].rq_nvec = 1; 1644 1645 rc = SMB2_query_info_init(tcon, server, 1646 &rqst[1], COMPOUND_FID, 1647 COMPOUND_FID, qi.file_info_class, 1648 qi.info_type, qi.additional_information, 1649 qi.input_buffer_length, 1650 qi.output_buffer_length, buffer); 1651 free_req1_func = SMB2_query_info_free; 1652 } else { /* unknown flags */ 1653 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1654 qi.flags); 1655 rc = -EINVAL; 1656 } 1657 1658 if (rc) 1659 goto free_open_req; 1660 smb2_set_next_command(tcon, &rqst[1]); 1661 smb2_set_related(&rqst[1]); 1662 1663 /* Close */ 1664 rqst[2].rq_iov = &vars->close_iov; 1665 rqst[2].rq_nvec = 1; 1666 1667 rc = SMB2_close_init(tcon, server, 1668 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1669 if (rc) 1670 goto free_req_1; 1671 smb2_set_related(&rqst[2]); 1672 1673 if (retries) { 1674 smb2_set_replay(server, &rqst[0]); 1675 smb2_set_replay(server, &rqst[1]); 1676 smb2_set_replay(server, &rqst[2]); 1677 } 1678 1679 rc = compound_send_recv(xid, ses, server, 1680 flags, 3, rqst, 1681 resp_buftype, rsp_iov); 1682 if (rc) 1683 goto out; 1684 1685 /* No need to bump num_remote_opens since handle immediately closed */ 1686 if (qi.flags & PASSTHRU_FSCTL) { 1687 pqi = (struct smb_query_info __user *)arg; 1688 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1689 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1690 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1691 if (qi.input_buffer_length > 0 && 1692 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1693 > rsp_iov[1].iov_len) { 1694 rc = -EFAULT; 1695 goto out; 1696 } 1697 1698 if (copy_to_user(&pqi->input_buffer_length, 1699 &qi.input_buffer_length, 1700 sizeof(qi.input_buffer_length))) { 1701 rc = -EFAULT; 1702 goto out; 1703 } 1704 1705 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1706 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1707 qi.input_buffer_length)) 1708 rc = -EFAULT; 1709 } else { 1710 pqi = (struct smb_query_info __user *)arg; 1711 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1712 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1713 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1714 if (copy_to_user(&pqi->input_buffer_length, 1715 &qi.input_buffer_length, 1716 sizeof(qi.input_buffer_length))) { 1717 rc = -EFAULT; 1718 goto out; 1719 } 1720 1721 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1722 qi.input_buffer_length)) 1723 rc = -EFAULT; 1724 } 1725 1726 out: 1727 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1728 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1729 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1730 SMB2_close_free(&rqst[2]); 1731 free_req_1: 1732 free_req1_func(&rqst[1]); 1733 free_open_req: 1734 SMB2_open_free(&rqst[0]); 1735 free_output_buffer: 1736 kfree(buffer); 1737 free_vars: 1738 kfree(vars); 1739 1740 if (is_replayable_error(rc) && 1741 smb2_should_replay(tcon, &retries, &cur_sleep)) 1742 goto replay_again; 1743 1744 return rc; 1745 } 1746 1747 static ssize_t 1748 smb2_copychunk_range(const unsigned int xid, 1749 struct cifsFileInfo *srcfile, 1750 struct cifsFileInfo *trgtfile, u64 src_off, 1751 u64 len, u64 dest_off) 1752 { 1753 int rc; 1754 unsigned int ret_data_len; 1755 struct copychunk_ioctl *pcchunk; 1756 struct copychunk_ioctl_rsp *retbuf = NULL; 1757 struct cifs_tcon *tcon; 1758 int chunks_copied = 0; 1759 bool chunk_sizes_updated = false; 1760 ssize_t bytes_written, total_bytes_written = 0; 1761 1762 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1763 if (pcchunk == NULL) 1764 return -ENOMEM; 1765 1766 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1767 /* Request a key from the server to identify the source of the copy */ 1768 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1769 srcfile->fid.persistent_fid, 1770 srcfile->fid.volatile_fid, pcchunk); 1771 1772 /* Note: request_res_key sets res_key null only if rc !=0 */ 1773 if (rc) 1774 goto cchunk_out; 1775 1776 /* For now array only one chunk long, will make more flexible later */ 1777 pcchunk->ChunkCount = cpu_to_le32(1); 1778 pcchunk->Reserved = 0; 1779 pcchunk->Reserved2 = 0; 1780 1781 tcon = tlink_tcon(trgtfile->tlink); 1782 1783 while (len > 0) { 1784 pcchunk->SourceOffset = cpu_to_le64(src_off); 1785 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1786 pcchunk->Length = 1787 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1788 1789 /* Request server copy to target from src identified by key */ 1790 kfree(retbuf); 1791 retbuf = NULL; 1792 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1793 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1794 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1795 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1796 if (rc == 0) { 1797 if (ret_data_len != 1798 sizeof(struct copychunk_ioctl_rsp)) { 1799 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1800 rc = -EIO; 1801 goto cchunk_out; 1802 } 1803 if (retbuf->TotalBytesWritten == 0) { 1804 cifs_dbg(FYI, "no bytes copied\n"); 1805 rc = -EIO; 1806 goto cchunk_out; 1807 } 1808 /* 1809 * Check if server claimed to write more than we asked 1810 */ 1811 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1812 le32_to_cpu(pcchunk->Length)) { 1813 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1814 rc = -EIO; 1815 goto cchunk_out; 1816 } 1817 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1818 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1819 rc = -EIO; 1820 goto cchunk_out; 1821 } 1822 chunks_copied++; 1823 1824 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1825 src_off += bytes_written; 1826 dest_off += bytes_written; 1827 len -= bytes_written; 1828 total_bytes_written += bytes_written; 1829 1830 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1831 le32_to_cpu(retbuf->ChunksWritten), 1832 le32_to_cpu(retbuf->ChunkBytesWritten), 1833 bytes_written); 1834 } else if (rc == -EINVAL) { 1835 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1836 goto cchunk_out; 1837 1838 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1839 le32_to_cpu(retbuf->ChunksWritten), 1840 le32_to_cpu(retbuf->ChunkBytesWritten), 1841 le32_to_cpu(retbuf->TotalBytesWritten)); 1842 1843 /* 1844 * Check if this is the first request using these sizes, 1845 * (ie check if copy succeed once with original sizes 1846 * and check if the server gave us different sizes after 1847 * we already updated max sizes on previous request). 1848 * if not then why is the server returning an error now 1849 */ 1850 if ((chunks_copied != 0) || chunk_sizes_updated) 1851 goto cchunk_out; 1852 1853 /* Check that server is not asking us to grow size */ 1854 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1855 tcon->max_bytes_chunk) 1856 tcon->max_bytes_chunk = 1857 le32_to_cpu(retbuf->ChunkBytesWritten); 1858 else 1859 goto cchunk_out; /* server gave us bogus size */ 1860 1861 /* No need to change MaxChunks since already set to 1 */ 1862 chunk_sizes_updated = true; 1863 } else 1864 goto cchunk_out; 1865 } 1866 1867 cchunk_out: 1868 kfree(pcchunk); 1869 kfree(retbuf); 1870 if (rc) 1871 return rc; 1872 else 1873 return total_bytes_written; 1874 } 1875 1876 static int 1877 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1878 struct cifs_fid *fid) 1879 { 1880 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1881 } 1882 1883 static unsigned int 1884 smb2_read_data_offset(char *buf) 1885 { 1886 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1887 1888 return rsp->DataOffset; 1889 } 1890 1891 static unsigned int 1892 smb2_read_data_length(char *buf, bool in_remaining) 1893 { 1894 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1895 1896 if (in_remaining) 1897 return le32_to_cpu(rsp->DataRemaining); 1898 1899 return le32_to_cpu(rsp->DataLength); 1900 } 1901 1902 1903 static int 1904 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1905 struct cifs_io_parms *parms, unsigned int *bytes_read, 1906 char **buf, int *buf_type) 1907 { 1908 parms->persistent_fid = pfid->persistent_fid; 1909 parms->volatile_fid = pfid->volatile_fid; 1910 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1911 } 1912 1913 static int 1914 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1915 struct cifs_io_parms *parms, unsigned int *written, 1916 struct kvec *iov, unsigned long nr_segs) 1917 { 1918 1919 parms->persistent_fid = pfid->persistent_fid; 1920 parms->volatile_fid = pfid->volatile_fid; 1921 return SMB2_write(xid, parms, written, iov, nr_segs); 1922 } 1923 1924 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1925 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1926 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1927 { 1928 struct cifsInodeInfo *cifsi; 1929 int rc; 1930 1931 cifsi = CIFS_I(inode); 1932 1933 /* if file already sparse don't bother setting sparse again */ 1934 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1935 return true; /* already sparse */ 1936 1937 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1938 return true; /* already not sparse */ 1939 1940 /* 1941 * Can't check for sparse support on share the usual way via the 1942 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1943 * since Samba server doesn't set the flag on the share, yet 1944 * supports the set sparse FSCTL and returns sparse correctly 1945 * in the file attributes. If we fail setting sparse though we 1946 * mark that server does not support sparse files for this share 1947 * to avoid repeatedly sending the unsupported fsctl to server 1948 * if the file is repeatedly extended. 1949 */ 1950 if (tcon->broken_sparse_sup) 1951 return false; 1952 1953 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1954 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1955 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1956 if (rc) { 1957 tcon->broken_sparse_sup = true; 1958 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1959 return false; 1960 } 1961 1962 if (setsparse) 1963 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1964 else 1965 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1966 1967 return true; 1968 } 1969 1970 static int 1971 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1972 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1973 { 1974 struct inode *inode; 1975 1976 /* 1977 * If extending file more than one page make sparse. Many Linux fs 1978 * make files sparse by default when extending via ftruncate 1979 */ 1980 inode = d_inode(cfile->dentry); 1981 1982 if (!set_alloc && (size > inode->i_size + 8192)) { 1983 __u8 set_sparse = 1; 1984 1985 /* whether set sparse succeeds or not, extend the file */ 1986 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1987 } 1988 1989 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1990 cfile->fid.volatile_fid, cfile->pid, size); 1991 } 1992 1993 static int 1994 smb2_duplicate_extents(const unsigned int xid, 1995 struct cifsFileInfo *srcfile, 1996 struct cifsFileInfo *trgtfile, u64 src_off, 1997 u64 len, u64 dest_off) 1998 { 1999 int rc; 2000 unsigned int ret_data_len; 2001 struct inode *inode; 2002 struct duplicate_extents_to_file dup_ext_buf; 2003 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 2004 2005 /* server fileays advertise duplicate extent support with this flag */ 2006 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 2007 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 2008 return -EOPNOTSUPP; 2009 2010 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 2011 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 2012 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 2013 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 2014 dup_ext_buf.ByteCount = cpu_to_le64(len); 2015 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 2016 src_off, dest_off, len); 2017 2018 inode = d_inode(trgtfile->dentry); 2019 if (inode->i_size < dest_off + len) { 2020 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 2021 if (rc) 2022 goto duplicate_extents_out; 2023 2024 /* 2025 * Although also could set plausible allocation size (i_blocks) 2026 * here in addition to setting the file size, in reflink 2027 * it is likely that the target file is sparse. Its allocation 2028 * size will be queried on next revalidate, but it is important 2029 * to make sure that file's cached size is updated immediately 2030 */ 2031 netfs_resize_file(netfs_inode(inode), dest_off + len, true); 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 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, "", 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 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2825 { 2826 int rc; 2827 __le16 srch_path = 0; /* Null - open root of share */ 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, cifs_sb, buf); 2834 2835 oparms = (struct cifs_open_parms) { 2836 .tcon = tcon, 2837 .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 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2845 NULL, NULL); 2846 if (rc) 2847 return rc; 2848 2849 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2850 fid.volatile_fid, buf); 2851 buf->f_type = SMB2_SUPER_MAGIC; 2852 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2853 return rc; 2854 } 2855 2856 static bool 2857 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2858 { 2859 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2860 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2861 } 2862 2863 static int 2864 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2865 __u64 length, __u32 type, int lock, int unlock, bool wait) 2866 { 2867 if (unlock && !lock) 2868 type = SMB2_LOCKFLAG_UNLOCK; 2869 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2870 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2871 current->tgid, length, offset, type, wait); 2872 } 2873 2874 static void 2875 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2876 { 2877 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2878 } 2879 2880 static void 2881 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2882 { 2883 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2884 } 2885 2886 static void 2887 smb2_new_lease_key(struct cifs_fid *fid) 2888 { 2889 generate_random_uuid(fid->lease_key); 2890 } 2891 2892 static int 2893 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2894 const char *search_name, 2895 struct dfs_info3_param **target_nodes, 2896 unsigned int *num_of_nodes, 2897 const struct nls_table *nls_codepage, int remap) 2898 { 2899 int rc; 2900 __le16 *utf16_path = NULL; 2901 int utf16_path_len = 0; 2902 struct cifs_tcon *tcon; 2903 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2904 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2905 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2906 int retry_count = 0; 2907 2908 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2909 2910 /* 2911 * Try to use the IPC tcon, otherwise just use any 2912 */ 2913 tcon = ses->tcon_ipc; 2914 if (tcon == NULL) { 2915 spin_lock(&cifs_tcp_ses_lock); 2916 tcon = list_first_entry_or_null(&ses->tcon_list, 2917 struct cifs_tcon, 2918 tcon_list); 2919 if (tcon) { 2920 tcon->tc_count++; 2921 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2922 netfs_trace_tcon_ref_get_dfs_refer); 2923 } 2924 spin_unlock(&cifs_tcp_ses_lock); 2925 } 2926 2927 if (tcon == NULL) { 2928 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2929 ses); 2930 rc = -ENOTCONN; 2931 goto out; 2932 } 2933 2934 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2935 &utf16_path_len, 2936 nls_codepage, remap); 2937 if (!utf16_path) { 2938 rc = -ENOMEM; 2939 goto out; 2940 } 2941 2942 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2943 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2944 if (!dfs_req) { 2945 rc = -ENOMEM; 2946 goto out; 2947 } 2948 2949 /* Highest DFS referral version understood */ 2950 dfs_req->MaxReferralLevel = DFS_VERSION; 2951 2952 /* Path to resolve in an UTF-16 null-terminated string */ 2953 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2954 2955 do { 2956 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2957 FSCTL_DFS_GET_REFERRALS, 2958 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2959 (char **)&dfs_rsp, &dfs_rsp_size); 2960 if (!is_retryable_error(rc)) 2961 break; 2962 usleep_range(512, 2048); 2963 } while (++retry_count < 5); 2964 2965 if (!rc && !dfs_rsp) 2966 rc = -EIO; 2967 if (rc) { 2968 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2969 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2970 goto out; 2971 } 2972 2973 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2974 num_of_nodes, target_nodes, 2975 nls_codepage, remap, search_name, 2976 true /* is_unicode */); 2977 if (rc) { 2978 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2979 goto out; 2980 } 2981 2982 out: 2983 if (tcon && !tcon->ipc) { 2984 /* ipc tcons are not refcounted */ 2985 spin_lock(&cifs_tcp_ses_lock); 2986 tcon->tc_count--; 2987 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, 2988 netfs_trace_tcon_ref_dec_dfs_refer); 2989 /* tc_count can never go negative */ 2990 WARN_ON(tcon->tc_count < 0); 2991 spin_unlock(&cifs_tcp_ses_lock); 2992 } 2993 kfree(utf16_path); 2994 kfree(dfs_req); 2995 kfree(dfs_rsp); 2996 return rc; 2997 } 2998 2999 static struct cifs_ntsd * 3000 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3001 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3002 { 3003 struct cifs_ntsd *pntsd = NULL; 3004 unsigned int xid; 3005 int rc = -EOPNOTSUPP; 3006 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3007 3008 if (IS_ERR(tlink)) 3009 return ERR_CAST(tlink); 3010 3011 xid = get_xid(); 3012 cifs_dbg(FYI, "trying to get acl\n"); 3013 3014 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3015 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3016 info); 3017 free_xid(xid); 3018 3019 cifs_put_tlink(tlink); 3020 3021 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3022 if (rc) 3023 return ERR_PTR(rc); 3024 return pntsd; 3025 3026 } 3027 3028 static struct cifs_ntsd * 3029 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3030 const char *path, u32 *pacllen, u32 info) 3031 { 3032 struct cifs_ntsd *pntsd = NULL; 3033 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3034 unsigned int xid; 3035 int rc; 3036 struct cifs_tcon *tcon; 3037 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3038 struct cifs_fid fid; 3039 struct cifs_open_parms oparms; 3040 __le16 *utf16_path; 3041 3042 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3043 if (IS_ERR(tlink)) 3044 return ERR_CAST(tlink); 3045 3046 tcon = tlink_tcon(tlink); 3047 xid = get_xid(); 3048 3049 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3050 if (!utf16_path) { 3051 rc = -ENOMEM; 3052 free_xid(xid); 3053 return ERR_PTR(rc); 3054 } 3055 3056 oparms = (struct cifs_open_parms) { 3057 .tcon = tcon, 3058 .path = path, 3059 .desired_access = READ_CONTROL, 3060 .disposition = FILE_OPEN, 3061 /* 3062 * When querying an ACL, even if the file is a symlink 3063 * we want to open the source not the target, and so 3064 * the protocol requires that the client specify this 3065 * flag when opening a reparse point 3066 */ 3067 .create_options = cifs_create_options(cifs_sb, 0) | 3068 OPEN_REPARSE_POINT, 3069 .fid = &fid, 3070 }; 3071 3072 if (info & SACL_SECINFO) 3073 oparms.desired_access |= SYSTEM_SECURITY; 3074 3075 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3076 NULL); 3077 kfree(utf16_path); 3078 if (!rc) { 3079 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3080 fid.volatile_fid, (void **)&pntsd, pacllen, 3081 info); 3082 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3083 } 3084 3085 cifs_put_tlink(tlink); 3086 free_xid(xid); 3087 3088 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3089 if (rc) 3090 return ERR_PTR(rc); 3091 return pntsd; 3092 } 3093 3094 static int 3095 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3096 struct inode *inode, const char *path, int aclflag) 3097 { 3098 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3099 unsigned int xid; 3100 int rc, access_flags = 0; 3101 struct cifs_tcon *tcon; 3102 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3103 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3104 struct cifs_fid fid; 3105 struct cifs_open_parms oparms; 3106 __le16 *utf16_path; 3107 3108 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3109 if (IS_ERR(tlink)) 3110 return PTR_ERR(tlink); 3111 3112 tcon = tlink_tcon(tlink); 3113 xid = get_xid(); 3114 3115 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3116 access_flags |= WRITE_OWNER; 3117 if (aclflag & CIFS_ACL_SACL) 3118 access_flags |= SYSTEM_SECURITY; 3119 if (aclflag & CIFS_ACL_DACL) 3120 access_flags |= WRITE_DAC; 3121 3122 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3123 if (!utf16_path) { 3124 rc = -ENOMEM; 3125 free_xid(xid); 3126 return rc; 3127 } 3128 3129 oparms = (struct cifs_open_parms) { 3130 .tcon = tcon, 3131 .desired_access = access_flags, 3132 .create_options = cifs_create_options(cifs_sb, 0), 3133 .disposition = FILE_OPEN, 3134 .path = path, 3135 .fid = &fid, 3136 }; 3137 3138 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3139 NULL, NULL); 3140 kfree(utf16_path); 3141 if (!rc) { 3142 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3143 fid.volatile_fid, pnntsd, acllen, aclflag); 3144 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3145 } 3146 3147 cifs_put_tlink(tlink); 3148 free_xid(xid); 3149 return rc; 3150 } 3151 3152 /* Retrieve an ACL from the server */ 3153 static struct cifs_ntsd * 3154 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3155 struct inode *inode, const char *path, 3156 u32 *pacllen, u32 info) 3157 { 3158 struct cifs_ntsd *pntsd = NULL; 3159 struct cifsFileInfo *open_file = NULL; 3160 3161 if (inode && !(info & SACL_SECINFO)) 3162 open_file = find_readable_file(CIFS_I(inode), true); 3163 if (!open_file || (info & SACL_SECINFO)) 3164 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3165 3166 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3167 cifsFileInfo_put(open_file); 3168 return pntsd; 3169 } 3170 3171 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3172 loff_t offset, loff_t len, unsigned int xid) 3173 { 3174 struct cifsFileInfo *cfile = file->private_data; 3175 struct file_zero_data_information fsctl_buf; 3176 3177 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3178 3179 fsctl_buf.FileOffset = cpu_to_le64(offset); 3180 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3181 3182 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3183 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3184 (char *)&fsctl_buf, 3185 sizeof(struct file_zero_data_information), 3186 0, NULL, NULL); 3187 } 3188 3189 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3190 loff_t offset, loff_t len, bool keep_size) 3191 { 3192 struct cifs_ses *ses = tcon->ses; 3193 struct inode *inode = file_inode(file); 3194 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3195 struct cifsFileInfo *cfile = file->private_data; 3196 unsigned long long new_size; 3197 long rc; 3198 unsigned int xid; 3199 3200 xid = get_xid(); 3201 3202 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3203 ses->Suid, offset, len); 3204 3205 inode_lock(inode); 3206 filemap_invalidate_lock(inode->i_mapping); 3207 3208 /* 3209 * We zero the range through ioctl, so we need remove the page caches 3210 * first, otherwise the data may be inconsistent with the server. 3211 */ 3212 truncate_pagecache_range(inode, offset, offset + len - 1); 3213 3214 /* if file not oplocked can't be sure whether asking to extend size */ 3215 rc = -EOPNOTSUPP; 3216 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3217 goto zero_range_exit; 3218 3219 rc = smb3_zero_data(file, tcon, offset, len, xid); 3220 if (rc < 0) 3221 goto zero_range_exit; 3222 3223 /* 3224 * do we also need to change the size of the file? 3225 */ 3226 new_size = offset + len; 3227 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3228 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3229 cfile->fid.volatile_fid, cfile->pid, new_size); 3230 if (rc >= 0) { 3231 truncate_setsize(inode, new_size); 3232 netfs_resize_file(&cifsi->netfs, new_size, true); 3233 if (offset < cifsi->netfs.zero_point) 3234 cifsi->netfs.zero_point = offset; 3235 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3236 } 3237 } 3238 3239 zero_range_exit: 3240 filemap_invalidate_unlock(inode->i_mapping); 3241 inode_unlock(inode); 3242 free_xid(xid); 3243 if (rc) 3244 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3245 ses->Suid, offset, len, rc); 3246 else 3247 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3248 ses->Suid, offset, len); 3249 return rc; 3250 } 3251 3252 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3253 loff_t offset, loff_t len) 3254 { 3255 struct inode *inode = file_inode(file); 3256 struct cifsFileInfo *cfile = file->private_data; 3257 struct file_zero_data_information fsctl_buf; 3258 long rc; 3259 unsigned int xid; 3260 __u8 set_sparse = 1; 3261 3262 xid = get_xid(); 3263 3264 inode_lock(inode); 3265 /* Need to make file sparse, if not already, before freeing range. */ 3266 /* Consider adding equivalent for compressed since it could also work */ 3267 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3268 rc = -EOPNOTSUPP; 3269 goto out; 3270 } 3271 3272 filemap_invalidate_lock(inode->i_mapping); 3273 /* 3274 * We implement the punch hole through ioctl, so we need remove the page 3275 * caches first, otherwise the data may be inconsistent with the server. 3276 */ 3277 truncate_pagecache_range(inode, offset, offset + len - 1); 3278 3279 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3280 3281 fsctl_buf.FileOffset = cpu_to_le64(offset); 3282 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3283 3284 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3285 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3286 (char *)&fsctl_buf, 3287 sizeof(struct file_zero_data_information), 3288 CIFSMaxBufSize, NULL, NULL); 3289 filemap_invalidate_unlock(inode->i_mapping); 3290 out: 3291 inode_unlock(inode); 3292 free_xid(xid); 3293 return rc; 3294 } 3295 3296 static int smb3_simple_fallocate_write_range(unsigned int xid, 3297 struct cifs_tcon *tcon, 3298 struct cifsFileInfo *cfile, 3299 loff_t off, loff_t len, 3300 char *buf) 3301 { 3302 struct cifs_io_parms io_parms = {0}; 3303 int nbytes; 3304 int rc = 0; 3305 struct kvec iov[2]; 3306 3307 io_parms.netfid = cfile->fid.netfid; 3308 io_parms.pid = current->tgid; 3309 io_parms.tcon = tcon; 3310 io_parms.persistent_fid = cfile->fid.persistent_fid; 3311 io_parms.volatile_fid = cfile->fid.volatile_fid; 3312 3313 while (len) { 3314 io_parms.offset = off; 3315 io_parms.length = len; 3316 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3317 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3318 /* iov[0] is reserved for smb header */ 3319 iov[1].iov_base = buf; 3320 iov[1].iov_len = io_parms.length; 3321 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3322 if (rc) 3323 break; 3324 if (nbytes > len) 3325 return -EINVAL; 3326 buf += nbytes; 3327 off += nbytes; 3328 len -= nbytes; 3329 } 3330 return rc; 3331 } 3332 3333 static int smb3_simple_fallocate_range(unsigned int xid, 3334 struct cifs_tcon *tcon, 3335 struct cifsFileInfo *cfile, 3336 loff_t off, loff_t len) 3337 { 3338 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3339 u32 out_data_len; 3340 char *buf = NULL; 3341 loff_t l; 3342 int rc; 3343 3344 in_data.file_offset = cpu_to_le64(off); 3345 in_data.length = cpu_to_le64(len); 3346 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3347 cfile->fid.volatile_fid, 3348 FSCTL_QUERY_ALLOCATED_RANGES, 3349 (char *)&in_data, sizeof(in_data), 3350 1024 * sizeof(struct file_allocated_range_buffer), 3351 (char **)&out_data, &out_data_len); 3352 if (rc) 3353 goto out; 3354 3355 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3356 if (buf == NULL) { 3357 rc = -ENOMEM; 3358 goto out; 3359 } 3360 3361 tmp_data = out_data; 3362 while (len) { 3363 /* 3364 * The rest of the region is unmapped so write it all. 3365 */ 3366 if (out_data_len == 0) { 3367 rc = smb3_simple_fallocate_write_range(xid, tcon, 3368 cfile, off, len, buf); 3369 goto out; 3370 } 3371 3372 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3373 rc = -EINVAL; 3374 goto out; 3375 } 3376 3377 if (off < le64_to_cpu(tmp_data->file_offset)) { 3378 /* 3379 * We are at a hole. Write until the end of the region 3380 * or until the next allocated data, 3381 * whichever comes next. 3382 */ 3383 l = le64_to_cpu(tmp_data->file_offset) - off; 3384 if (len < l) 3385 l = len; 3386 rc = smb3_simple_fallocate_write_range(xid, tcon, 3387 cfile, off, l, buf); 3388 if (rc) 3389 goto out; 3390 off = off + l; 3391 len = len - l; 3392 if (len == 0) 3393 goto out; 3394 } 3395 /* 3396 * We are at a section of allocated data, just skip forward 3397 * until the end of the data or the end of the region 3398 * we are supposed to fallocate, whichever comes first. 3399 */ 3400 l = le64_to_cpu(tmp_data->length); 3401 if (len < l) 3402 l = len; 3403 off += l; 3404 len -= l; 3405 3406 tmp_data = &tmp_data[1]; 3407 out_data_len -= sizeof(struct file_allocated_range_buffer); 3408 } 3409 3410 out: 3411 kfree(out_data); 3412 kfree(buf); 3413 return rc; 3414 } 3415 3416 3417 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3418 loff_t off, loff_t len, bool keep_size) 3419 { 3420 struct inode *inode; 3421 struct cifsInodeInfo *cifsi; 3422 struct cifsFileInfo *cfile = file->private_data; 3423 long rc = -EOPNOTSUPP; 3424 unsigned int xid; 3425 loff_t new_eof; 3426 3427 xid = get_xid(); 3428 3429 inode = d_inode(cfile->dentry); 3430 cifsi = CIFS_I(inode); 3431 3432 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3433 tcon->ses->Suid, off, len); 3434 /* if file not oplocked can't be sure whether asking to extend size */ 3435 if (!CIFS_CACHE_READ(cifsi)) 3436 if (keep_size == false) { 3437 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3438 tcon->tid, tcon->ses->Suid, off, len, rc); 3439 free_xid(xid); 3440 return rc; 3441 } 3442 3443 /* 3444 * Extending the file 3445 */ 3446 if ((keep_size == false) && i_size_read(inode) < off + len) { 3447 rc = inode_newsize_ok(inode, off + len); 3448 if (rc) 3449 goto out; 3450 3451 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3452 smb2_set_sparse(xid, tcon, cfile, inode, false); 3453 3454 new_eof = off + len; 3455 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3456 cfile->fid.volatile_fid, cfile->pid, new_eof); 3457 if (rc == 0) { 3458 netfs_resize_file(&cifsi->netfs, new_eof, true); 3459 cifs_setsize(inode, new_eof); 3460 cifs_truncate_page(inode->i_mapping, inode->i_size); 3461 truncate_setsize(inode, new_eof); 3462 } 3463 goto out; 3464 } 3465 3466 /* 3467 * Files are non-sparse by default so falloc may be a no-op 3468 * Must check if file sparse. If not sparse, and since we are not 3469 * extending then no need to do anything since file already allocated 3470 */ 3471 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3472 rc = 0; 3473 goto out; 3474 } 3475 3476 if (keep_size == true) { 3477 /* 3478 * We can not preallocate pages beyond the end of the file 3479 * in SMB2 3480 */ 3481 if (off >= i_size_read(inode)) { 3482 rc = 0; 3483 goto out; 3484 } 3485 /* 3486 * For fallocates that are partially beyond the end of file, 3487 * clamp len so we only fallocate up to the end of file. 3488 */ 3489 if (off + len > i_size_read(inode)) { 3490 len = i_size_read(inode) - off; 3491 } 3492 } 3493 3494 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3495 /* 3496 * At this point, we are trying to fallocate an internal 3497 * regions of a sparse file. Since smb2 does not have a 3498 * fallocate command we have two otions on how to emulate this. 3499 * We can either turn the entire file to become non-sparse 3500 * which we only do if the fallocate is for virtually 3501 * the whole file, or we can overwrite the region with zeroes 3502 * using SMB2_write, which could be prohibitevly expensive 3503 * if len is large. 3504 */ 3505 /* 3506 * We are only trying to fallocate a small region so 3507 * just write it with zero. 3508 */ 3509 if (len <= 1024 * 1024) { 3510 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3511 off, len); 3512 goto out; 3513 } 3514 3515 /* 3516 * Check if falloc starts within first few pages of file 3517 * and ends within a few pages of the end of file to 3518 * ensure that most of file is being forced to be 3519 * fallocated now. If so then setting whole file sparse 3520 * ie potentially making a few extra pages at the beginning 3521 * or end of the file non-sparse via set_sparse is harmless. 3522 */ 3523 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3524 rc = -EOPNOTSUPP; 3525 goto out; 3526 } 3527 } 3528 3529 smb2_set_sparse(xid, tcon, cfile, inode, false); 3530 rc = 0; 3531 3532 out: 3533 if (rc) 3534 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3535 tcon->ses->Suid, off, len, rc); 3536 else 3537 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3538 tcon->ses->Suid, off, len); 3539 3540 free_xid(xid); 3541 return rc; 3542 } 3543 3544 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3545 loff_t off, loff_t len) 3546 { 3547 int rc; 3548 unsigned int xid; 3549 struct inode *inode = file_inode(file); 3550 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3551 struct cifsFileInfo *cfile = file->private_data; 3552 struct netfs_inode *ictx = &cifsi->netfs; 3553 loff_t old_eof, new_eof; 3554 3555 xid = get_xid(); 3556 3557 inode_lock(inode); 3558 3559 old_eof = i_size_read(inode); 3560 if ((off >= old_eof) || 3561 off + len >= old_eof) { 3562 rc = -EINVAL; 3563 goto out; 3564 } 3565 3566 filemap_invalidate_lock(inode->i_mapping); 3567 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3568 if (rc < 0) 3569 goto out_2; 3570 3571 truncate_pagecache_range(inode, off, old_eof); 3572 ictx->zero_point = old_eof; 3573 3574 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3575 old_eof - off - len, off); 3576 if (rc < 0) 3577 goto out_2; 3578 3579 new_eof = old_eof - len; 3580 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3581 cfile->fid.volatile_fid, cfile->pid, new_eof); 3582 if (rc < 0) 3583 goto out_2; 3584 3585 rc = 0; 3586 3587 truncate_setsize(inode, new_eof); 3588 netfs_resize_file(&cifsi->netfs, new_eof, true); 3589 ictx->zero_point = new_eof; 3590 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); 3591 out_2: 3592 filemap_invalidate_unlock(inode->i_mapping); 3593 out: 3594 inode_unlock(inode); 3595 free_xid(xid); 3596 return rc; 3597 } 3598 3599 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3600 loff_t off, loff_t len) 3601 { 3602 int rc; 3603 unsigned int xid; 3604 struct cifsFileInfo *cfile = file->private_data; 3605 struct inode *inode = file_inode(file); 3606 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3607 __u64 count, old_eof, new_eof; 3608 3609 xid = get_xid(); 3610 3611 inode_lock(inode); 3612 3613 old_eof = i_size_read(inode); 3614 if (off >= old_eof) { 3615 rc = -EINVAL; 3616 goto out; 3617 } 3618 3619 count = old_eof - off; 3620 new_eof = old_eof + len; 3621 3622 filemap_invalidate_lock(inode->i_mapping); 3623 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); 3624 if (rc < 0) 3625 goto out_2; 3626 truncate_pagecache_range(inode, off, old_eof); 3627 3628 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3629 cfile->fid.volatile_fid, cfile->pid, new_eof); 3630 if (rc < 0) 3631 goto out_2; 3632 3633 truncate_setsize(inode, new_eof); 3634 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); 3635 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3636 3637 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3638 if (rc < 0) 3639 goto out_2; 3640 cifsi->netfs.zero_point = new_eof; 3641 3642 rc = smb3_zero_data(file, tcon, off, len, xid); 3643 if (rc < 0) 3644 goto out_2; 3645 3646 rc = 0; 3647 out_2: 3648 filemap_invalidate_unlock(inode->i_mapping); 3649 out: 3650 inode_unlock(inode); 3651 free_xid(xid); 3652 return rc; 3653 } 3654 3655 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3656 { 3657 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3658 struct cifsInodeInfo *cifsi; 3659 struct inode *inode; 3660 int rc = 0; 3661 struct file_allocated_range_buffer in_data, *out_data = NULL; 3662 u32 out_data_len; 3663 unsigned int xid; 3664 3665 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3666 return generic_file_llseek(file, offset, whence); 3667 3668 inode = d_inode(cfile->dentry); 3669 cifsi = CIFS_I(inode); 3670 3671 if (offset < 0 || offset >= i_size_read(inode)) 3672 return -ENXIO; 3673 3674 xid = get_xid(); 3675 /* 3676 * We need to be sure that all dirty pages are written as they 3677 * might fill holes on the server. 3678 * Note that we also MUST flush any written pages since at least 3679 * some servers (Windows2016) will not reflect recent writes in 3680 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3681 */ 3682 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3683 if (wrcfile) { 3684 filemap_write_and_wait(inode->i_mapping); 3685 smb2_flush_file(xid, tcon, &wrcfile->fid); 3686 cifsFileInfo_put(wrcfile); 3687 } 3688 3689 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3690 if (whence == SEEK_HOLE) 3691 offset = i_size_read(inode); 3692 goto lseek_exit; 3693 } 3694 3695 in_data.file_offset = cpu_to_le64(offset); 3696 in_data.length = cpu_to_le64(i_size_read(inode)); 3697 3698 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3699 cfile->fid.volatile_fid, 3700 FSCTL_QUERY_ALLOCATED_RANGES, 3701 (char *)&in_data, sizeof(in_data), 3702 sizeof(struct file_allocated_range_buffer), 3703 (char **)&out_data, &out_data_len); 3704 if (rc == -E2BIG) 3705 rc = 0; 3706 if (rc) 3707 goto lseek_exit; 3708 3709 if (whence == SEEK_HOLE && out_data_len == 0) 3710 goto lseek_exit; 3711 3712 if (whence == SEEK_DATA && out_data_len == 0) { 3713 rc = -ENXIO; 3714 goto lseek_exit; 3715 } 3716 3717 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3718 rc = -EINVAL; 3719 goto lseek_exit; 3720 } 3721 if (whence == SEEK_DATA) { 3722 offset = le64_to_cpu(out_data->file_offset); 3723 goto lseek_exit; 3724 } 3725 if (offset < le64_to_cpu(out_data->file_offset)) 3726 goto lseek_exit; 3727 3728 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3729 3730 lseek_exit: 3731 free_xid(xid); 3732 kfree(out_data); 3733 if (!rc) 3734 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3735 else 3736 return rc; 3737 } 3738 3739 static int smb3_fiemap(struct cifs_tcon *tcon, 3740 struct cifsFileInfo *cfile, 3741 struct fiemap_extent_info *fei, u64 start, u64 len) 3742 { 3743 unsigned int xid; 3744 struct file_allocated_range_buffer in_data, *out_data; 3745 u32 out_data_len; 3746 int i, num, rc, flags, last_blob; 3747 u64 next; 3748 3749 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3750 if (rc) 3751 return rc; 3752 3753 xid = get_xid(); 3754 again: 3755 in_data.file_offset = cpu_to_le64(start); 3756 in_data.length = cpu_to_le64(len); 3757 3758 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3759 cfile->fid.volatile_fid, 3760 FSCTL_QUERY_ALLOCATED_RANGES, 3761 (char *)&in_data, sizeof(in_data), 3762 1024 * sizeof(struct file_allocated_range_buffer), 3763 (char **)&out_data, &out_data_len); 3764 if (rc == -E2BIG) { 3765 last_blob = 0; 3766 rc = 0; 3767 } else 3768 last_blob = 1; 3769 if (rc) 3770 goto out; 3771 3772 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3773 rc = -EINVAL; 3774 goto out; 3775 } 3776 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3777 rc = -EINVAL; 3778 goto out; 3779 } 3780 3781 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3782 for (i = 0; i < num; i++) { 3783 flags = 0; 3784 if (i == num - 1 && last_blob) 3785 flags |= FIEMAP_EXTENT_LAST; 3786 3787 rc = fiemap_fill_next_extent(fei, 3788 le64_to_cpu(out_data[i].file_offset), 3789 le64_to_cpu(out_data[i].file_offset), 3790 le64_to_cpu(out_data[i].length), 3791 flags); 3792 if (rc < 0) 3793 goto out; 3794 if (rc == 1) { 3795 rc = 0; 3796 goto out; 3797 } 3798 } 3799 3800 if (!last_blob) { 3801 next = le64_to_cpu(out_data[num - 1].file_offset) + 3802 le64_to_cpu(out_data[num - 1].length); 3803 len = len - (next - start); 3804 start = next; 3805 goto again; 3806 } 3807 3808 out: 3809 free_xid(xid); 3810 kfree(out_data); 3811 return rc; 3812 } 3813 3814 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3815 loff_t off, loff_t len) 3816 { 3817 /* KEEP_SIZE already checked for by do_fallocate */ 3818 if (mode & FALLOC_FL_PUNCH_HOLE) 3819 return smb3_punch_hole(file, tcon, off, len); 3820 else if (mode & FALLOC_FL_ZERO_RANGE) { 3821 if (mode & FALLOC_FL_KEEP_SIZE) 3822 return smb3_zero_range(file, tcon, off, len, true); 3823 return smb3_zero_range(file, tcon, off, len, false); 3824 } else if (mode == FALLOC_FL_KEEP_SIZE) 3825 return smb3_simple_falloc(file, tcon, off, len, true); 3826 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3827 return smb3_collapse_range(file, tcon, off, len); 3828 else if (mode == FALLOC_FL_INSERT_RANGE) 3829 return smb3_insert_range(file, tcon, off, len); 3830 else if (mode == 0) 3831 return smb3_simple_falloc(file, tcon, off, len, false); 3832 3833 return -EOPNOTSUPP; 3834 } 3835 3836 static void 3837 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3838 struct cifsInodeInfo *cinode, __u32 oplock, 3839 unsigned int epoch, bool *purge_cache) 3840 { 3841 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3842 } 3843 3844 static void 3845 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3846 unsigned int epoch, bool *purge_cache); 3847 3848 static void 3849 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3850 struct cifsInodeInfo *cinode, __u32 oplock, 3851 unsigned int epoch, bool *purge_cache) 3852 { 3853 unsigned int old_state = cinode->oplock; 3854 unsigned int old_epoch = cinode->epoch; 3855 unsigned int new_state; 3856 3857 if (epoch > old_epoch) { 3858 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3859 cinode->epoch = epoch; 3860 } 3861 3862 new_state = cinode->oplock; 3863 *purge_cache = false; 3864 3865 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3866 (new_state & CIFS_CACHE_READ_FLG) == 0) 3867 *purge_cache = true; 3868 else if (old_state == new_state && (epoch - old_epoch > 1)) 3869 *purge_cache = true; 3870 } 3871 3872 static void 3873 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3874 unsigned int epoch, bool *purge_cache) 3875 { 3876 oplock &= 0xFF; 3877 cinode->lease_granted = false; 3878 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3879 return; 3880 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3881 cinode->oplock = CIFS_CACHE_RHW_FLG; 3882 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3883 &cinode->netfs.inode); 3884 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3885 cinode->oplock = CIFS_CACHE_RW_FLG; 3886 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3887 &cinode->netfs.inode); 3888 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3889 cinode->oplock = CIFS_CACHE_READ_FLG; 3890 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3891 &cinode->netfs.inode); 3892 } else 3893 cinode->oplock = 0; 3894 } 3895 3896 static void 3897 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3898 unsigned int epoch, bool *purge_cache) 3899 { 3900 char message[5] = {0}; 3901 unsigned int new_oplock = 0; 3902 3903 oplock &= 0xFF; 3904 cinode->lease_granted = true; 3905 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3906 return; 3907 3908 /* Check if the server granted an oplock rather than a lease */ 3909 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3910 return smb2_set_oplock_level(cinode, oplock, epoch, 3911 purge_cache); 3912 3913 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 3914 new_oplock |= CIFS_CACHE_READ_FLG; 3915 strcat(message, "R"); 3916 } 3917 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 3918 new_oplock |= CIFS_CACHE_HANDLE_FLG; 3919 strcat(message, "H"); 3920 } 3921 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 3922 new_oplock |= CIFS_CACHE_WRITE_FLG; 3923 strcat(message, "W"); 3924 } 3925 if (!new_oplock) 3926 strscpy(message, "None"); 3927 3928 cinode->oplock = new_oplock; 3929 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 3930 &cinode->netfs.inode); 3931 } 3932 3933 static void 3934 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3935 unsigned int epoch, bool *purge_cache) 3936 { 3937 unsigned int old_oplock = cinode->oplock; 3938 3939 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 3940 3941 if (purge_cache) { 3942 *purge_cache = false; 3943 if (old_oplock == CIFS_CACHE_READ_FLG) { 3944 if (cinode->oplock == CIFS_CACHE_READ_FLG && 3945 (epoch - cinode->epoch > 0)) 3946 *purge_cache = true; 3947 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 3948 (epoch - cinode->epoch > 1)) 3949 *purge_cache = true; 3950 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3951 (epoch - cinode->epoch > 1)) 3952 *purge_cache = true; 3953 else if (cinode->oplock == 0 && 3954 (epoch - cinode->epoch > 0)) 3955 *purge_cache = true; 3956 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 3957 if (cinode->oplock == CIFS_CACHE_RH_FLG && 3958 (epoch - cinode->epoch > 0)) 3959 *purge_cache = true; 3960 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 3961 (epoch - cinode->epoch > 1)) 3962 *purge_cache = true; 3963 } 3964 cinode->epoch = epoch; 3965 } 3966 } 3967 3968 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 3969 static bool 3970 smb2_is_read_op(__u32 oplock) 3971 { 3972 return oplock == SMB2_OPLOCK_LEVEL_II; 3973 } 3974 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 3975 3976 static bool 3977 smb21_is_read_op(__u32 oplock) 3978 { 3979 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 3980 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 3981 } 3982 3983 static __le32 3984 map_oplock_to_lease(u8 oplock) 3985 { 3986 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 3987 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 3988 else if (oplock == SMB2_OPLOCK_LEVEL_II) 3989 return SMB2_LEASE_READ_CACHING_LE; 3990 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 3991 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 3992 SMB2_LEASE_WRITE_CACHING_LE; 3993 return 0; 3994 } 3995 3996 static char * 3997 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 3998 { 3999 struct create_lease *buf; 4000 4001 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4002 if (!buf) 4003 return NULL; 4004 4005 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4006 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4007 4008 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4009 (struct create_lease, lcontext)); 4010 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4011 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4012 (struct create_lease, Name)); 4013 buf->ccontext.NameLength = cpu_to_le16(4); 4014 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4015 buf->Name[0] = 'R'; 4016 buf->Name[1] = 'q'; 4017 buf->Name[2] = 'L'; 4018 buf->Name[3] = 's'; 4019 return (char *)buf; 4020 } 4021 4022 static char * 4023 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4024 { 4025 struct create_lease_v2 *buf; 4026 4027 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4028 if (!buf) 4029 return NULL; 4030 4031 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4032 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4033 4034 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4035 (struct create_lease_v2, lcontext)); 4036 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4037 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4038 (struct create_lease_v2, Name)); 4039 buf->ccontext.NameLength = cpu_to_le16(4); 4040 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4041 buf->Name[0] = 'R'; 4042 buf->Name[1] = 'q'; 4043 buf->Name[2] = 'L'; 4044 buf->Name[3] = 's'; 4045 return (char *)buf; 4046 } 4047 4048 static __u8 4049 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4050 { 4051 struct create_lease *lc = (struct create_lease *)buf; 4052 4053 *epoch = 0; /* not used */ 4054 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4055 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4056 return le32_to_cpu(lc->lcontext.LeaseState); 4057 } 4058 4059 static __u8 4060 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4061 { 4062 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4063 4064 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4065 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4066 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4067 if (lease_key) 4068 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4069 return le32_to_cpu(lc->lcontext.LeaseState); 4070 } 4071 4072 static unsigned int 4073 smb2_wp_retry_size(struct inode *inode) 4074 { 4075 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4076 SMB2_MAX_BUFFER_SIZE); 4077 } 4078 4079 static bool 4080 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4081 { 4082 return !cfile->invalidHandle; 4083 } 4084 4085 static void 4086 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4087 struct smb_rqst *old_rq, __le16 cipher_type) 4088 { 4089 struct smb2_hdr *shdr = 4090 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4091 4092 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4093 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4094 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4095 tr_hdr->Flags = cpu_to_le16(0x01); 4096 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4097 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4098 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4099 else 4100 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4101 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4102 } 4103 4104 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4105 int num_rqst, const u8 *sig, u8 **iv, 4106 struct aead_request **req, struct sg_table *sgt, 4107 unsigned int *num_sgs, size_t *sensitive_size) 4108 { 4109 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4110 unsigned int iv_size = crypto_aead_ivsize(tfm); 4111 unsigned int len; 4112 u8 *p; 4113 4114 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4115 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4116 return ERR_PTR(*num_sgs); 4117 4118 len = iv_size; 4119 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4120 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4121 len += req_size; 4122 len = ALIGN(len, __alignof__(struct scatterlist)); 4123 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4124 *sensitive_size = len; 4125 4126 p = kvzalloc(len, GFP_NOFS); 4127 if (!p) 4128 return ERR_PTR(-ENOMEM); 4129 4130 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4131 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4132 crypto_tfm_ctx_alignment()); 4133 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4134 __alignof__(struct scatterlist)); 4135 return p; 4136 } 4137 4138 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4139 int num_rqst, const u8 *sig, u8 **iv, 4140 struct aead_request **req, struct scatterlist **sgl, 4141 size_t *sensitive_size) 4142 { 4143 struct sg_table sgtable = {}; 4144 unsigned int skip, num_sgs, i, j; 4145 ssize_t rc; 4146 void *p; 4147 4148 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4149 &num_sgs, sensitive_size); 4150 if (IS_ERR(p)) 4151 return ERR_CAST(p); 4152 4153 sg_init_marker(sgtable.sgl, num_sgs); 4154 4155 /* 4156 * The first rqst has a transform header where the 4157 * first 20 bytes are not part of the encrypted blob. 4158 */ 4159 skip = 20; 4160 4161 for (i = 0; i < num_rqst; i++) { 4162 struct iov_iter *iter = &rqst[i].rq_iter; 4163 size_t count = iov_iter_count(iter); 4164 4165 for (j = 0; j < rqst[i].rq_nvec; j++) { 4166 cifs_sg_set_buf(&sgtable, 4167 rqst[i].rq_iov[j].iov_base + skip, 4168 rqst[i].rq_iov[j].iov_len - skip); 4169 4170 /* See the above comment on the 'skip' assignment */ 4171 skip = 0; 4172 } 4173 sgtable.orig_nents = sgtable.nents; 4174 4175 rc = extract_iter_to_sg(iter, count, &sgtable, 4176 num_sgs - sgtable.nents, 0); 4177 iov_iter_revert(iter, rc); 4178 sgtable.orig_nents = sgtable.nents; 4179 } 4180 4181 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4182 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4183 *sgl = sgtable.sgl; 4184 return p; 4185 } 4186 4187 static int 4188 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4189 { 4190 struct TCP_Server_Info *pserver; 4191 struct cifs_ses *ses; 4192 u8 *ses_enc_key; 4193 4194 /* If server is a channel, select the primary channel */ 4195 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4196 4197 spin_lock(&cifs_tcp_ses_lock); 4198 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4199 if (ses->Suid == ses_id) { 4200 spin_lock(&ses->ses_lock); 4201 ses_enc_key = enc ? ses->smb3encryptionkey : 4202 ses->smb3decryptionkey; 4203 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4204 spin_unlock(&ses->ses_lock); 4205 spin_unlock(&cifs_tcp_ses_lock); 4206 return 0; 4207 } 4208 } 4209 spin_unlock(&cifs_tcp_ses_lock); 4210 4211 trace_smb3_ses_not_found(ses_id); 4212 4213 return -EAGAIN; 4214 } 4215 /* 4216 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4217 * iov[0] - transform header (associate data), 4218 * iov[1-N] - SMB2 header and pages - data to encrypt. 4219 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4220 * untouched. 4221 */ 4222 static int 4223 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4224 struct smb_rqst *rqst, int enc) 4225 { 4226 struct smb2_transform_hdr *tr_hdr = 4227 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4228 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4229 int rc = 0; 4230 struct scatterlist *sg; 4231 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4232 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4233 struct aead_request *req; 4234 u8 *iv; 4235 DECLARE_CRYPTO_WAIT(wait); 4236 struct crypto_aead *tfm; 4237 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4238 void *creq; 4239 size_t sensitive_size; 4240 4241 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4242 if (rc) { 4243 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4244 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4245 return rc; 4246 } 4247 4248 rc = smb3_crypto_aead_allocate(server); 4249 if (rc) { 4250 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4251 return rc; 4252 } 4253 4254 tfm = enc ? server->secmech.enc : server->secmech.dec; 4255 4256 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4257 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4258 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4259 else 4260 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4261 4262 if (rc) { 4263 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4264 return rc; 4265 } 4266 4267 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4268 if (rc) { 4269 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4270 return rc; 4271 } 4272 4273 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4274 &sensitive_size); 4275 if (IS_ERR(creq)) 4276 return PTR_ERR(creq); 4277 4278 if (!enc) { 4279 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4280 crypt_len += SMB2_SIGNATURE_SIZE; 4281 } 4282 4283 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4284 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4285 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4286 else { 4287 iv[0] = 3; 4288 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4289 } 4290 4291 aead_request_set_tfm(req, tfm); 4292 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4293 aead_request_set_ad(req, assoc_data_len); 4294 4295 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4296 crypto_req_done, &wait); 4297 4298 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4299 : crypto_aead_decrypt(req), &wait); 4300 4301 if (!rc && enc) 4302 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4303 4304 kvfree_sensitive(creq, sensitive_size); 4305 return rc; 4306 } 4307 4308 /* 4309 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4310 */ 4311 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4312 { 4313 struct folio *folio; 4314 4315 XA_STATE(xas, buffer, 0); 4316 4317 rcu_read_lock(); 4318 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4319 folio_put(folio); 4320 } 4321 rcu_read_unlock(); 4322 xa_destroy(buffer); 4323 } 4324 4325 void 4326 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4327 { 4328 int i; 4329 4330 for (i = 0; i < num_rqst; i++) 4331 if (!xa_empty(&rqst[i].rq_buffer)) 4332 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4333 } 4334 4335 /* 4336 * This function will initialize new_rq and encrypt the content. 4337 * The first entry, new_rq[0], only contains a single iov which contains 4338 * a smb2_transform_hdr and is pre-allocated by the caller. 4339 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4340 * 4341 * The end result is an array of smb_rqst structures where the first structure 4342 * only contains a single iov for the transform header which we then can pass 4343 * to crypt_message(). 4344 * 4345 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4346 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4347 */ 4348 static int 4349 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4350 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4351 { 4352 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4353 struct page *page; 4354 unsigned int orig_len = 0; 4355 int i, j; 4356 int rc = -ENOMEM; 4357 4358 for (i = 1; i < num_rqst; i++) { 4359 struct smb_rqst *old = &old_rq[i - 1]; 4360 struct smb_rqst *new = &new_rq[i]; 4361 struct xarray *buffer = &new->rq_buffer; 4362 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4363 4364 orig_len += smb_rqst_len(server, old); 4365 new->rq_iov = old->rq_iov; 4366 new->rq_nvec = old->rq_nvec; 4367 4368 xa_init(buffer); 4369 4370 if (size > 0) { 4371 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4372 4373 for (j = 0; j < npages; j++) { 4374 void *o; 4375 4376 rc = -ENOMEM; 4377 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4378 if (!page) 4379 goto err_free; 4380 page->index = j; 4381 o = xa_store(buffer, j, page, GFP_KERNEL); 4382 if (xa_is_err(o)) { 4383 rc = xa_err(o); 4384 put_page(page); 4385 goto err_free; 4386 } 4387 4388 xa_set_mark(buffer, j, XA_MARK_0); 4389 4390 seg = min_t(size_t, size - copied, PAGE_SIZE); 4391 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4392 rc = -EFAULT; 4393 goto err_free; 4394 } 4395 copied += seg; 4396 } 4397 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4398 buffer, 0, size); 4399 new->rq_iter_size = size; 4400 } 4401 } 4402 4403 /* fill the 1st iov with a transform header */ 4404 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4405 4406 rc = crypt_message(server, num_rqst, new_rq, 1); 4407 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4408 if (rc) 4409 goto err_free; 4410 4411 return rc; 4412 4413 err_free: 4414 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4415 return rc; 4416 } 4417 4418 static int 4419 smb3_is_transform_hdr(void *buf) 4420 { 4421 struct smb2_transform_hdr *trhdr = buf; 4422 4423 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4424 } 4425 4426 static int 4427 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4428 unsigned int buf_data_size, struct iov_iter *iter, 4429 bool is_offloaded) 4430 { 4431 struct kvec iov[2]; 4432 struct smb_rqst rqst = {NULL}; 4433 size_t iter_size = 0; 4434 int rc; 4435 4436 iov[0].iov_base = buf; 4437 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4438 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4439 iov[1].iov_len = buf_data_size; 4440 4441 rqst.rq_iov = iov; 4442 rqst.rq_nvec = 2; 4443 if (iter) { 4444 rqst.rq_iter = *iter; 4445 rqst.rq_iter_size = iov_iter_count(iter); 4446 iter_size = iov_iter_count(iter); 4447 } 4448 4449 rc = crypt_message(server, 1, &rqst, 0); 4450 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4451 4452 if (rc) 4453 return rc; 4454 4455 memmove(buf, iov[1].iov_base, buf_data_size); 4456 4457 if (!is_offloaded) 4458 server->total_read = buf_data_size + iter_size; 4459 4460 return rc; 4461 } 4462 4463 static int 4464 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4465 unsigned int skip, struct iov_iter *iter) 4466 { 4467 struct page *page; 4468 unsigned long index; 4469 4470 xa_for_each(pages, index, page) { 4471 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4472 4473 n = copy_page_to_iter(page, skip, len, iter); 4474 if (n != len) { 4475 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4476 return -EIO; 4477 } 4478 data_size -= n; 4479 skip = 0; 4480 } 4481 4482 return 0; 4483 } 4484 4485 static int 4486 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4487 char *buf, unsigned int buf_len, struct xarray *pages, 4488 unsigned int pages_len, bool is_offloaded) 4489 { 4490 unsigned int data_offset; 4491 unsigned int data_len; 4492 unsigned int cur_off; 4493 unsigned int cur_page_idx; 4494 unsigned int pad_len; 4495 struct cifs_io_subrequest *rdata = mid->callback_data; 4496 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4497 int length; 4498 bool use_rdma_mr = false; 4499 4500 if (shdr->Command != SMB2_READ) { 4501 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4502 return -EOPNOTSUPP; 4503 } 4504 4505 if (server->ops->is_session_expired && 4506 server->ops->is_session_expired(buf)) { 4507 if (!is_offloaded) 4508 cifs_reconnect(server, true); 4509 return -1; 4510 } 4511 4512 if (server->ops->is_status_pending && 4513 server->ops->is_status_pending(buf, server)) 4514 return -1; 4515 4516 /* set up first two iov to get credits */ 4517 rdata->iov[0].iov_base = buf; 4518 rdata->iov[0].iov_len = 0; 4519 rdata->iov[1].iov_base = buf; 4520 rdata->iov[1].iov_len = 4521 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4522 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4523 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4524 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4525 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4526 4527 rdata->result = server->ops->map_error(buf, true); 4528 if (rdata->result != 0) { 4529 cifs_dbg(FYI, "%s: server returned error %d\n", 4530 __func__, rdata->result); 4531 /* normal error on read response */ 4532 if (is_offloaded) 4533 mid->mid_state = MID_RESPONSE_RECEIVED; 4534 else 4535 dequeue_mid(mid, false); 4536 return 0; 4537 } 4538 4539 data_offset = server->ops->read_data_offset(buf); 4540 #ifdef CONFIG_CIFS_SMB_DIRECT 4541 use_rdma_mr = rdata->mr; 4542 #endif 4543 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4544 4545 if (data_offset < server->vals->read_rsp_size) { 4546 /* 4547 * win2k8 sometimes sends an offset of 0 when the read 4548 * is beyond the EOF. Treat it as if the data starts just after 4549 * the header. 4550 */ 4551 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4552 __func__, data_offset); 4553 data_offset = server->vals->read_rsp_size; 4554 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4555 /* data_offset is beyond the end of smallbuf */ 4556 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4557 __func__, data_offset); 4558 rdata->result = -EIO; 4559 if (is_offloaded) 4560 mid->mid_state = MID_RESPONSE_MALFORMED; 4561 else 4562 dequeue_mid(mid, rdata->result); 4563 return 0; 4564 } 4565 4566 pad_len = data_offset - server->vals->read_rsp_size; 4567 4568 if (buf_len <= data_offset) { 4569 /* read response payload is in pages */ 4570 cur_page_idx = pad_len / PAGE_SIZE; 4571 cur_off = pad_len % PAGE_SIZE; 4572 4573 if (cur_page_idx != 0) { 4574 /* data offset is beyond the 1st page of response */ 4575 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4576 __func__, data_offset); 4577 rdata->result = -EIO; 4578 if (is_offloaded) 4579 mid->mid_state = MID_RESPONSE_MALFORMED; 4580 else 4581 dequeue_mid(mid, rdata->result); 4582 return 0; 4583 } 4584 4585 if (data_len > pages_len - pad_len) { 4586 /* data_len is corrupt -- discard frame */ 4587 rdata->result = -EIO; 4588 if (is_offloaded) 4589 mid->mid_state = MID_RESPONSE_MALFORMED; 4590 else 4591 dequeue_mid(mid, rdata->result); 4592 return 0; 4593 } 4594 4595 /* Copy the data to the output I/O iterator. */ 4596 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4597 cur_off, &rdata->subreq.io_iter); 4598 if (rdata->result != 0) { 4599 if (is_offloaded) 4600 mid->mid_state = MID_RESPONSE_MALFORMED; 4601 else 4602 dequeue_mid(mid, rdata->result); 4603 return 0; 4604 } 4605 rdata->got_bytes = pages_len; 4606 4607 } else if (buf_len >= data_offset + data_len) { 4608 /* read response payload is in buf */ 4609 WARN_ONCE(pages && !xa_empty(pages), 4610 "read data can be either in buf or in pages"); 4611 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); 4612 if (length < 0) 4613 return length; 4614 rdata->got_bytes = data_len; 4615 } else { 4616 /* read response payload cannot be in both buf and pages */ 4617 WARN_ONCE(1, "buf can not contain only a part of read data"); 4618 rdata->result = -EIO; 4619 if (is_offloaded) 4620 mid->mid_state = MID_RESPONSE_MALFORMED; 4621 else 4622 dequeue_mid(mid, rdata->result); 4623 return 0; 4624 } 4625 4626 if (is_offloaded) 4627 mid->mid_state = MID_RESPONSE_RECEIVED; 4628 else 4629 dequeue_mid(mid, false); 4630 return 0; 4631 } 4632 4633 struct smb2_decrypt_work { 4634 struct work_struct decrypt; 4635 struct TCP_Server_Info *server; 4636 struct xarray buffer; 4637 char *buf; 4638 unsigned int len; 4639 }; 4640 4641 4642 static void smb2_decrypt_offload(struct work_struct *work) 4643 { 4644 struct smb2_decrypt_work *dw = container_of(work, 4645 struct smb2_decrypt_work, decrypt); 4646 int rc; 4647 struct mid_q_entry *mid; 4648 struct iov_iter iter; 4649 4650 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4651 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4652 &iter, true); 4653 if (rc) { 4654 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4655 goto free_pages; 4656 } 4657 4658 dw->server->lstrp = jiffies; 4659 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4660 if (mid == NULL) 4661 cifs_dbg(FYI, "mid not found\n"); 4662 else { 4663 mid->decrypted = true; 4664 rc = handle_read_data(dw->server, mid, dw->buf, 4665 dw->server->vals->read_rsp_size, 4666 &dw->buffer, dw->len, 4667 true); 4668 if (rc >= 0) { 4669 #ifdef CONFIG_CIFS_STATS2 4670 mid->when_received = jiffies; 4671 #endif 4672 if (dw->server->ops->is_network_name_deleted) 4673 dw->server->ops->is_network_name_deleted(dw->buf, 4674 dw->server); 4675 4676 mid->callback(mid); 4677 } else { 4678 spin_lock(&dw->server->srv_lock); 4679 if (dw->server->tcpStatus == CifsNeedReconnect) { 4680 spin_lock(&dw->server->mid_lock); 4681 mid->mid_state = MID_RETRY_NEEDED; 4682 spin_unlock(&dw->server->mid_lock); 4683 spin_unlock(&dw->server->srv_lock); 4684 mid->callback(mid); 4685 } else { 4686 spin_lock(&dw->server->mid_lock); 4687 mid->mid_state = MID_REQUEST_SUBMITTED; 4688 mid->mid_flags &= ~(MID_DELETED); 4689 list_add_tail(&mid->qhead, 4690 &dw->server->pending_mid_q); 4691 spin_unlock(&dw->server->mid_lock); 4692 spin_unlock(&dw->server->srv_lock); 4693 } 4694 } 4695 release_mid(mid); 4696 } 4697 4698 free_pages: 4699 cifs_clear_xarray_buffer(&dw->buffer); 4700 cifs_small_buf_release(dw->buf); 4701 kfree(dw); 4702 } 4703 4704 4705 static int 4706 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4707 int *num_mids) 4708 { 4709 struct page *page; 4710 char *buf = server->smallbuf; 4711 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4712 struct iov_iter iter; 4713 unsigned int len, npages; 4714 unsigned int buflen = server->pdu_size; 4715 int rc; 4716 int i = 0; 4717 struct smb2_decrypt_work *dw; 4718 4719 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4720 if (!dw) 4721 return -ENOMEM; 4722 xa_init(&dw->buffer); 4723 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4724 dw->server = server; 4725 4726 *num_mids = 1; 4727 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4728 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4729 4730 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4731 if (rc < 0) 4732 goto free_dw; 4733 server->total_read += rc; 4734 4735 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4736 server->vals->read_rsp_size; 4737 dw->len = len; 4738 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4739 4740 rc = -ENOMEM; 4741 for (; i < npages; i++) { 4742 void *old; 4743 4744 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4745 if (!page) 4746 goto discard_data; 4747 page->index = i; 4748 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4749 if (xa_is_err(old)) { 4750 rc = xa_err(old); 4751 put_page(page); 4752 goto discard_data; 4753 } 4754 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4755 } 4756 4757 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4758 4759 /* Read the data into the buffer and clear excess bufferage. */ 4760 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4761 if (rc < 0) 4762 goto discard_data; 4763 4764 server->total_read += rc; 4765 if (rc < npages * PAGE_SIZE) 4766 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4767 iov_iter_revert(&iter, npages * PAGE_SIZE); 4768 iov_iter_truncate(&iter, dw->len); 4769 4770 rc = cifs_discard_remaining_data(server); 4771 if (rc) 4772 goto free_pages; 4773 4774 /* 4775 * For large reads, offload to different thread for better performance, 4776 * use more cores decrypting which can be expensive 4777 */ 4778 4779 if ((server->min_offload) && (server->in_flight > 1) && 4780 (server->pdu_size >= server->min_offload)) { 4781 dw->buf = server->smallbuf; 4782 server->smallbuf = (char *)cifs_small_buf_get(); 4783 4784 queue_work(decrypt_wq, &dw->decrypt); 4785 *num_mids = 0; /* worker thread takes care of finding mid */ 4786 return -1; 4787 } 4788 4789 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4790 &iter, false); 4791 if (rc) 4792 goto free_pages; 4793 4794 *mid = smb2_find_mid(server, buf); 4795 if (*mid == NULL) { 4796 cifs_dbg(FYI, "mid not found\n"); 4797 } else { 4798 cifs_dbg(FYI, "mid found\n"); 4799 (*mid)->decrypted = true; 4800 rc = handle_read_data(server, *mid, buf, 4801 server->vals->read_rsp_size, 4802 &dw->buffer, dw->len, false); 4803 if (rc >= 0) { 4804 if (server->ops->is_network_name_deleted) { 4805 server->ops->is_network_name_deleted(buf, 4806 server); 4807 } 4808 } 4809 } 4810 4811 free_pages: 4812 cifs_clear_xarray_buffer(&dw->buffer); 4813 free_dw: 4814 kfree(dw); 4815 return rc; 4816 discard_data: 4817 cifs_discard_remaining_data(server); 4818 goto free_pages; 4819 } 4820 4821 static int 4822 receive_encrypted_standard(struct TCP_Server_Info *server, 4823 struct mid_q_entry **mids, char **bufs, 4824 int *num_mids) 4825 { 4826 int ret, length; 4827 char *buf = server->smallbuf; 4828 struct smb2_hdr *shdr; 4829 unsigned int pdu_length = server->pdu_size; 4830 unsigned int buf_size; 4831 unsigned int next_cmd; 4832 struct mid_q_entry *mid_entry; 4833 int next_is_large; 4834 char *next_buffer = NULL; 4835 4836 *num_mids = 0; 4837 4838 /* switch to large buffer if too big for a small one */ 4839 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4840 server->large_buf = true; 4841 memcpy(server->bigbuf, buf, server->total_read); 4842 buf = server->bigbuf; 4843 } 4844 4845 /* now read the rest */ 4846 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4847 pdu_length - HEADER_SIZE(server) + 1); 4848 if (length < 0) 4849 return length; 4850 server->total_read += length; 4851 4852 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4853 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4854 if (length) 4855 return length; 4856 4857 next_is_large = server->large_buf; 4858 one_more: 4859 shdr = (struct smb2_hdr *)buf; 4860 next_cmd = le32_to_cpu(shdr->NextCommand); 4861 if (next_cmd) { 4862 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4863 return -1; 4864 if (next_is_large) 4865 next_buffer = (char *)cifs_buf_get(); 4866 else 4867 next_buffer = (char *)cifs_small_buf_get(); 4868 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4869 } 4870 4871 mid_entry = smb2_find_mid(server, buf); 4872 if (mid_entry == NULL) 4873 cifs_dbg(FYI, "mid not found\n"); 4874 else { 4875 cifs_dbg(FYI, "mid found\n"); 4876 mid_entry->decrypted = true; 4877 mid_entry->resp_buf_size = server->pdu_size; 4878 } 4879 4880 if (*num_mids >= MAX_COMPOUND) { 4881 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4882 return -1; 4883 } 4884 bufs[*num_mids] = buf; 4885 mids[(*num_mids)++] = mid_entry; 4886 4887 if (mid_entry && mid_entry->handle) 4888 ret = mid_entry->handle(server, mid_entry); 4889 else 4890 ret = cifs_handle_standard(server, mid_entry); 4891 4892 if (ret == 0 && next_cmd) { 4893 pdu_length -= next_cmd; 4894 server->large_buf = next_is_large; 4895 if (next_is_large) 4896 server->bigbuf = buf = next_buffer; 4897 else 4898 server->smallbuf = buf = next_buffer; 4899 goto one_more; 4900 } else if (ret != 0) { 4901 /* 4902 * ret != 0 here means that we didn't get to handle_mid() thus 4903 * server->smallbuf and server->bigbuf are still valid. We need 4904 * to free next_buffer because it is not going to be used 4905 * anywhere. 4906 */ 4907 if (next_is_large) 4908 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 4909 else 4910 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 4911 } 4912 4913 return ret; 4914 } 4915 4916 static int 4917 smb3_receive_transform(struct TCP_Server_Info *server, 4918 struct mid_q_entry **mids, char **bufs, int *num_mids) 4919 { 4920 char *buf = server->smallbuf; 4921 unsigned int pdu_length = server->pdu_size; 4922 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4923 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4924 4925 if (pdu_length < sizeof(struct smb2_transform_hdr) + 4926 sizeof(struct smb2_hdr)) { 4927 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 4928 pdu_length); 4929 cifs_reconnect(server, true); 4930 return -ECONNABORTED; 4931 } 4932 4933 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 4934 cifs_server_dbg(VFS, "Transform message is broken\n"); 4935 cifs_reconnect(server, true); 4936 return -ECONNABORTED; 4937 } 4938 4939 /* TODO: add support for compounds containing READ. */ 4940 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 4941 return receive_encrypted_read(server, &mids[0], num_mids); 4942 } 4943 4944 return receive_encrypted_standard(server, mids, bufs, num_mids); 4945 } 4946 4947 int 4948 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 4949 { 4950 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 4951 4952 return handle_read_data(server, mid, buf, server->pdu_size, 4953 NULL, 0, false); 4954 } 4955 4956 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 4957 unsigned int *noff) 4958 { 4959 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 4960 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 4961 4962 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 4963 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 4964 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 4965 return -EINVAL; 4966 } else { 4967 *noff = le32_to_cpu(hdr->NextCommand); 4968 } 4969 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 4970 return -EINVAL; 4971 return 0; 4972 } 4973 4974 static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 4975 struct dentry *dentry, struct cifs_tcon *tcon, 4976 const char *full_path, umode_t mode, dev_t dev) 4977 { 4978 struct TCP_Server_Info *server = tcon->ses->server; 4979 struct cifs_open_parms oparms; 4980 struct cifs_io_parms io_parms = {}; 4981 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 4982 struct cifs_fid fid; 4983 unsigned int bytes_written; 4984 struct win_dev pdev = {}; 4985 struct kvec iov[2]; 4986 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 4987 int rc; 4988 4989 switch (mode & S_IFMT) { 4990 case S_IFCHR: 4991 strscpy(pdev.type, "IntxCHR"); 4992 pdev.major = cpu_to_le64(MAJOR(dev)); 4993 pdev.minor = cpu_to_le64(MINOR(dev)); 4994 break; 4995 case S_IFBLK: 4996 strscpy(pdev.type, "IntxBLK"); 4997 pdev.major = cpu_to_le64(MAJOR(dev)); 4998 pdev.minor = cpu_to_le64(MINOR(dev)); 4999 break; 5000 case S_IFSOCK: 5001 strscpy(pdev.type, "LnxSOCK"); 5002 break; 5003 case S_IFIFO: 5004 strscpy(pdev.type, "LnxFIFO"); 5005 break; 5006 default: 5007 return -EPERM; 5008 } 5009 5010 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, 5011 FILE_CREATE, CREATE_NOT_DIR | 5012 CREATE_OPTION_SPECIAL, ACL_NO_MODE); 5013 oparms.fid = &fid; 5014 5015 rc = server->ops->open(xid, &oparms, &oplock, NULL); 5016 if (rc) 5017 return rc; 5018 5019 io_parms.pid = current->tgid; 5020 io_parms.tcon = tcon; 5021 io_parms.length = sizeof(pdev); 5022 iov[1].iov_base = &pdev; 5023 iov[1].iov_len = sizeof(pdev); 5024 5025 rc = server->ops->sync_write(xid, &fid, &io_parms, 5026 &bytes_written, iov, 1); 5027 server->ops->close(xid, tcon, &fid); 5028 return rc; 5029 } 5030 5031 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5032 struct dentry *dentry, struct cifs_tcon *tcon, 5033 const char *full_path, umode_t mode, dev_t dev) 5034 { 5035 struct inode *new = NULL; 5036 int rc; 5037 5038 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, 5039 full_path, mode, dev); 5040 if (rc) 5041 return rc; 5042 5043 if (tcon->posix_extensions) { 5044 rc = smb311_posix_get_inode_info(&new, full_path, NULL, 5045 inode->i_sb, xid); 5046 } else if (tcon->unix_ext) { 5047 rc = cifs_get_inode_info_unix(&new, full_path, 5048 inode->i_sb, xid); 5049 } else { 5050 rc = cifs_get_inode_info(&new, full_path, NULL, 5051 inode->i_sb, xid, NULL); 5052 } 5053 if (!rc) 5054 d_instantiate(dentry, new); 5055 return rc; 5056 } 5057 5058 static int smb2_make_node(unsigned int xid, struct inode *inode, 5059 struct dentry *dentry, struct cifs_tcon *tcon, 5060 const char *full_path, umode_t mode, dev_t dev) 5061 { 5062 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5063 int rc; 5064 5065 /* 5066 * Check if mounted with mount parm 'sfu' mount parm. 5067 * SFU emulation should work with all servers, but only 5068 * supports block and char device (no socket & fifo), 5069 * and was used by default in earlier versions of Windows 5070 */ 5071 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { 5072 rc = cifs_sfu_make_node(xid, inode, dentry, tcon, 5073 full_path, mode, dev); 5074 } else { 5075 rc = smb2_mknod_reparse(xid, inode, dentry, tcon, 5076 full_path, mode, dev); 5077 } 5078 return rc; 5079 } 5080 5081 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5082 struct smb_version_operations smb20_operations = { 5083 .compare_fids = smb2_compare_fids, 5084 .setup_request = smb2_setup_request, 5085 .setup_async_request = smb2_setup_async_request, 5086 .check_receive = smb2_check_receive, 5087 .add_credits = smb2_add_credits, 5088 .set_credits = smb2_set_credits, 5089 .get_credits_field = smb2_get_credits_field, 5090 .get_credits = smb2_get_credits, 5091 .wait_mtu_credits = cifs_wait_mtu_credits, 5092 .get_next_mid = smb2_get_next_mid, 5093 .revert_current_mid = smb2_revert_current_mid, 5094 .read_data_offset = smb2_read_data_offset, 5095 .read_data_length = smb2_read_data_length, 5096 .map_error = map_smb2_to_linux_error, 5097 .find_mid = smb2_find_mid, 5098 .check_message = smb2_check_message, 5099 .dump_detail = smb2_dump_detail, 5100 .clear_stats = smb2_clear_stats, 5101 .print_stats = smb2_print_stats, 5102 .is_oplock_break = smb2_is_valid_oplock_break, 5103 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5104 .downgrade_oplock = smb2_downgrade_oplock, 5105 .need_neg = smb2_need_neg, 5106 .negotiate = smb2_negotiate, 5107 .negotiate_wsize = smb2_negotiate_wsize, 5108 .negotiate_rsize = smb2_negotiate_rsize, 5109 .sess_setup = SMB2_sess_setup, 5110 .logoff = SMB2_logoff, 5111 .tree_connect = SMB2_tcon, 5112 .tree_disconnect = SMB2_tdis, 5113 .qfs_tcon = smb2_qfs_tcon, 5114 .is_path_accessible = smb2_is_path_accessible, 5115 .can_echo = smb2_can_echo, 5116 .echo = SMB2_echo, 5117 .query_path_info = smb2_query_path_info, 5118 .query_reparse_point = smb2_query_reparse_point, 5119 .get_srv_inum = smb2_get_srv_inum, 5120 .query_file_info = smb2_query_file_info, 5121 .set_path_size = smb2_set_path_size, 5122 .set_file_size = smb2_set_file_size, 5123 .set_file_info = smb2_set_file_info, 5124 .set_compression = smb2_set_compression, 5125 .mkdir = smb2_mkdir, 5126 .mkdir_setinfo = smb2_mkdir_setinfo, 5127 .rmdir = smb2_rmdir, 5128 .unlink = smb2_unlink, 5129 .rename = smb2_rename_path, 5130 .create_hardlink = smb2_create_hardlink, 5131 .parse_reparse_point = smb2_parse_reparse_point, 5132 .query_mf_symlink = smb3_query_mf_symlink, 5133 .create_mf_symlink = smb3_create_mf_symlink, 5134 .create_reparse_symlink = smb2_create_reparse_symlink, 5135 .open = smb2_open_file, 5136 .set_fid = smb2_set_fid, 5137 .close = smb2_close_file, 5138 .flush = smb2_flush_file, 5139 .async_readv = smb2_async_readv, 5140 .async_writev = smb2_async_writev, 5141 .sync_read = smb2_sync_read, 5142 .sync_write = smb2_sync_write, 5143 .query_dir_first = smb2_query_dir_first, 5144 .query_dir_next = smb2_query_dir_next, 5145 .close_dir = smb2_close_dir, 5146 .calc_smb_size = smb2_calc_size, 5147 .is_status_pending = smb2_is_status_pending, 5148 .is_session_expired = smb2_is_session_expired, 5149 .oplock_response = smb2_oplock_response, 5150 .queryfs = smb2_queryfs, 5151 .mand_lock = smb2_mand_lock, 5152 .mand_unlock_range = smb2_unlock_range, 5153 .push_mand_locks = smb2_push_mandatory_locks, 5154 .get_lease_key = smb2_get_lease_key, 5155 .set_lease_key = smb2_set_lease_key, 5156 .new_lease_key = smb2_new_lease_key, 5157 .calc_signature = smb2_calc_signature, 5158 .is_read_op = smb2_is_read_op, 5159 .set_oplock_level = smb2_set_oplock_level, 5160 .create_lease_buf = smb2_create_lease_buf, 5161 .parse_lease_buf = smb2_parse_lease_buf, 5162 .copychunk_range = smb2_copychunk_range, 5163 .wp_retry_size = smb2_wp_retry_size, 5164 .dir_needs_close = smb2_dir_needs_close, 5165 .get_dfs_refer = smb2_get_dfs_refer, 5166 .select_sectype = smb2_select_sectype, 5167 #ifdef CONFIG_CIFS_XATTR 5168 .query_all_EAs = smb2_query_eas, 5169 .set_EA = smb2_set_ea, 5170 #endif /* CIFS_XATTR */ 5171 .get_acl = get_smb2_acl, 5172 .get_acl_by_fid = get_smb2_acl_by_fid, 5173 .set_acl = set_smb2_acl, 5174 .next_header = smb2_next_header, 5175 .ioctl_query_info = smb2_ioctl_query_info, 5176 .make_node = smb2_make_node, 5177 .fiemap = smb3_fiemap, 5178 .llseek = smb3_llseek, 5179 .is_status_io_timeout = smb2_is_status_io_timeout, 5180 .is_network_name_deleted = smb2_is_network_name_deleted, 5181 }; 5182 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5183 5184 struct smb_version_operations smb21_operations = { 5185 .compare_fids = smb2_compare_fids, 5186 .setup_request = smb2_setup_request, 5187 .setup_async_request = smb2_setup_async_request, 5188 .check_receive = smb2_check_receive, 5189 .add_credits = smb2_add_credits, 5190 .set_credits = smb2_set_credits, 5191 .get_credits_field = smb2_get_credits_field, 5192 .get_credits = smb2_get_credits, 5193 .wait_mtu_credits = smb2_wait_mtu_credits, 5194 .adjust_credits = smb2_adjust_credits, 5195 .get_next_mid = smb2_get_next_mid, 5196 .revert_current_mid = smb2_revert_current_mid, 5197 .read_data_offset = smb2_read_data_offset, 5198 .read_data_length = smb2_read_data_length, 5199 .map_error = map_smb2_to_linux_error, 5200 .find_mid = smb2_find_mid, 5201 .check_message = smb2_check_message, 5202 .dump_detail = smb2_dump_detail, 5203 .clear_stats = smb2_clear_stats, 5204 .print_stats = smb2_print_stats, 5205 .is_oplock_break = smb2_is_valid_oplock_break, 5206 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5207 .downgrade_oplock = smb2_downgrade_oplock, 5208 .need_neg = smb2_need_neg, 5209 .negotiate = smb2_negotiate, 5210 .negotiate_wsize = smb2_negotiate_wsize, 5211 .negotiate_rsize = smb2_negotiate_rsize, 5212 .sess_setup = SMB2_sess_setup, 5213 .logoff = SMB2_logoff, 5214 .tree_connect = SMB2_tcon, 5215 .tree_disconnect = SMB2_tdis, 5216 .qfs_tcon = smb2_qfs_tcon, 5217 .is_path_accessible = smb2_is_path_accessible, 5218 .can_echo = smb2_can_echo, 5219 .echo = SMB2_echo, 5220 .query_path_info = smb2_query_path_info, 5221 .query_reparse_point = smb2_query_reparse_point, 5222 .get_srv_inum = smb2_get_srv_inum, 5223 .query_file_info = smb2_query_file_info, 5224 .set_path_size = smb2_set_path_size, 5225 .set_file_size = smb2_set_file_size, 5226 .set_file_info = smb2_set_file_info, 5227 .set_compression = smb2_set_compression, 5228 .mkdir = smb2_mkdir, 5229 .mkdir_setinfo = smb2_mkdir_setinfo, 5230 .rmdir = smb2_rmdir, 5231 .unlink = smb2_unlink, 5232 .rename = smb2_rename_path, 5233 .create_hardlink = smb2_create_hardlink, 5234 .parse_reparse_point = smb2_parse_reparse_point, 5235 .query_mf_symlink = smb3_query_mf_symlink, 5236 .create_mf_symlink = smb3_create_mf_symlink, 5237 .create_reparse_symlink = smb2_create_reparse_symlink, 5238 .open = smb2_open_file, 5239 .set_fid = smb2_set_fid, 5240 .close = smb2_close_file, 5241 .flush = smb2_flush_file, 5242 .async_readv = smb2_async_readv, 5243 .async_writev = smb2_async_writev, 5244 .sync_read = smb2_sync_read, 5245 .sync_write = smb2_sync_write, 5246 .query_dir_first = smb2_query_dir_first, 5247 .query_dir_next = smb2_query_dir_next, 5248 .close_dir = smb2_close_dir, 5249 .calc_smb_size = smb2_calc_size, 5250 .is_status_pending = smb2_is_status_pending, 5251 .is_session_expired = smb2_is_session_expired, 5252 .oplock_response = smb2_oplock_response, 5253 .queryfs = smb2_queryfs, 5254 .mand_lock = smb2_mand_lock, 5255 .mand_unlock_range = smb2_unlock_range, 5256 .push_mand_locks = smb2_push_mandatory_locks, 5257 .get_lease_key = smb2_get_lease_key, 5258 .set_lease_key = smb2_set_lease_key, 5259 .new_lease_key = smb2_new_lease_key, 5260 .calc_signature = smb2_calc_signature, 5261 .is_read_op = smb21_is_read_op, 5262 .set_oplock_level = smb21_set_oplock_level, 5263 .create_lease_buf = smb2_create_lease_buf, 5264 .parse_lease_buf = smb2_parse_lease_buf, 5265 .copychunk_range = smb2_copychunk_range, 5266 .wp_retry_size = smb2_wp_retry_size, 5267 .dir_needs_close = smb2_dir_needs_close, 5268 .enum_snapshots = smb3_enum_snapshots, 5269 .notify = smb3_notify, 5270 .get_dfs_refer = smb2_get_dfs_refer, 5271 .select_sectype = smb2_select_sectype, 5272 #ifdef CONFIG_CIFS_XATTR 5273 .query_all_EAs = smb2_query_eas, 5274 .set_EA = smb2_set_ea, 5275 #endif /* CIFS_XATTR */ 5276 .get_acl = get_smb2_acl, 5277 .get_acl_by_fid = get_smb2_acl_by_fid, 5278 .set_acl = set_smb2_acl, 5279 .next_header = smb2_next_header, 5280 .ioctl_query_info = smb2_ioctl_query_info, 5281 .make_node = smb2_make_node, 5282 .fiemap = smb3_fiemap, 5283 .llseek = smb3_llseek, 5284 .is_status_io_timeout = smb2_is_status_io_timeout, 5285 .is_network_name_deleted = smb2_is_network_name_deleted, 5286 }; 5287 5288 struct smb_version_operations smb30_operations = { 5289 .compare_fids = smb2_compare_fids, 5290 .setup_request = smb2_setup_request, 5291 .setup_async_request = smb2_setup_async_request, 5292 .check_receive = smb2_check_receive, 5293 .add_credits = smb2_add_credits, 5294 .set_credits = smb2_set_credits, 5295 .get_credits_field = smb2_get_credits_field, 5296 .get_credits = smb2_get_credits, 5297 .wait_mtu_credits = smb2_wait_mtu_credits, 5298 .adjust_credits = smb2_adjust_credits, 5299 .get_next_mid = smb2_get_next_mid, 5300 .revert_current_mid = smb2_revert_current_mid, 5301 .read_data_offset = smb2_read_data_offset, 5302 .read_data_length = smb2_read_data_length, 5303 .map_error = map_smb2_to_linux_error, 5304 .find_mid = smb2_find_mid, 5305 .check_message = smb2_check_message, 5306 .dump_detail = smb2_dump_detail, 5307 .clear_stats = smb2_clear_stats, 5308 .print_stats = smb2_print_stats, 5309 .dump_share_caps = smb2_dump_share_caps, 5310 .is_oplock_break = smb2_is_valid_oplock_break, 5311 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5312 .downgrade_oplock = smb3_downgrade_oplock, 5313 .need_neg = smb2_need_neg, 5314 .negotiate = smb2_negotiate, 5315 .negotiate_wsize = smb3_negotiate_wsize, 5316 .negotiate_rsize = smb3_negotiate_rsize, 5317 .sess_setup = SMB2_sess_setup, 5318 .logoff = SMB2_logoff, 5319 .tree_connect = SMB2_tcon, 5320 .tree_disconnect = SMB2_tdis, 5321 .qfs_tcon = smb3_qfs_tcon, 5322 .query_server_interfaces = SMB3_request_interfaces, 5323 .is_path_accessible = smb2_is_path_accessible, 5324 .can_echo = smb2_can_echo, 5325 .echo = SMB2_echo, 5326 .query_path_info = smb2_query_path_info, 5327 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5328 .query_reparse_point = smb2_query_reparse_point, 5329 .get_srv_inum = smb2_get_srv_inum, 5330 .query_file_info = smb2_query_file_info, 5331 .set_path_size = smb2_set_path_size, 5332 .set_file_size = smb2_set_file_size, 5333 .set_file_info = smb2_set_file_info, 5334 .set_compression = smb2_set_compression, 5335 .mkdir = smb2_mkdir, 5336 .mkdir_setinfo = smb2_mkdir_setinfo, 5337 .rmdir = smb2_rmdir, 5338 .unlink = smb2_unlink, 5339 .rename = smb2_rename_path, 5340 .create_hardlink = smb2_create_hardlink, 5341 .parse_reparse_point = smb2_parse_reparse_point, 5342 .query_mf_symlink = smb3_query_mf_symlink, 5343 .create_mf_symlink = smb3_create_mf_symlink, 5344 .create_reparse_symlink = smb2_create_reparse_symlink, 5345 .open = smb2_open_file, 5346 .set_fid = smb2_set_fid, 5347 .close = smb2_close_file, 5348 .close_getattr = smb2_close_getattr, 5349 .flush = smb2_flush_file, 5350 .async_readv = smb2_async_readv, 5351 .async_writev = smb2_async_writev, 5352 .sync_read = smb2_sync_read, 5353 .sync_write = smb2_sync_write, 5354 .query_dir_first = smb2_query_dir_first, 5355 .query_dir_next = smb2_query_dir_next, 5356 .close_dir = smb2_close_dir, 5357 .calc_smb_size = smb2_calc_size, 5358 .is_status_pending = smb2_is_status_pending, 5359 .is_session_expired = smb2_is_session_expired, 5360 .oplock_response = smb2_oplock_response, 5361 .queryfs = smb2_queryfs, 5362 .mand_lock = smb2_mand_lock, 5363 .mand_unlock_range = smb2_unlock_range, 5364 .push_mand_locks = smb2_push_mandatory_locks, 5365 .get_lease_key = smb2_get_lease_key, 5366 .set_lease_key = smb2_set_lease_key, 5367 .new_lease_key = smb2_new_lease_key, 5368 .generate_signingkey = generate_smb30signingkey, 5369 .calc_signature = smb3_calc_signature, 5370 .set_integrity = smb3_set_integrity, 5371 .is_read_op = smb21_is_read_op, 5372 .set_oplock_level = smb3_set_oplock_level, 5373 .create_lease_buf = smb3_create_lease_buf, 5374 .parse_lease_buf = smb3_parse_lease_buf, 5375 .copychunk_range = smb2_copychunk_range, 5376 .duplicate_extents = smb2_duplicate_extents, 5377 .validate_negotiate = smb3_validate_negotiate, 5378 .wp_retry_size = smb2_wp_retry_size, 5379 .dir_needs_close = smb2_dir_needs_close, 5380 .fallocate = smb3_fallocate, 5381 .enum_snapshots = smb3_enum_snapshots, 5382 .notify = smb3_notify, 5383 .init_transform_rq = smb3_init_transform_rq, 5384 .is_transform_hdr = smb3_is_transform_hdr, 5385 .receive_transform = smb3_receive_transform, 5386 .get_dfs_refer = smb2_get_dfs_refer, 5387 .select_sectype = smb2_select_sectype, 5388 #ifdef CONFIG_CIFS_XATTR 5389 .query_all_EAs = smb2_query_eas, 5390 .set_EA = smb2_set_ea, 5391 #endif /* CIFS_XATTR */ 5392 .get_acl = get_smb2_acl, 5393 .get_acl_by_fid = get_smb2_acl_by_fid, 5394 .set_acl = set_smb2_acl, 5395 .next_header = smb2_next_header, 5396 .ioctl_query_info = smb2_ioctl_query_info, 5397 .make_node = smb2_make_node, 5398 .fiemap = smb3_fiemap, 5399 .llseek = smb3_llseek, 5400 .is_status_io_timeout = smb2_is_status_io_timeout, 5401 .is_network_name_deleted = smb2_is_network_name_deleted, 5402 }; 5403 5404 struct smb_version_operations smb311_operations = { 5405 .compare_fids = smb2_compare_fids, 5406 .setup_request = smb2_setup_request, 5407 .setup_async_request = smb2_setup_async_request, 5408 .check_receive = smb2_check_receive, 5409 .add_credits = smb2_add_credits, 5410 .set_credits = smb2_set_credits, 5411 .get_credits_field = smb2_get_credits_field, 5412 .get_credits = smb2_get_credits, 5413 .wait_mtu_credits = smb2_wait_mtu_credits, 5414 .adjust_credits = smb2_adjust_credits, 5415 .get_next_mid = smb2_get_next_mid, 5416 .revert_current_mid = smb2_revert_current_mid, 5417 .read_data_offset = smb2_read_data_offset, 5418 .read_data_length = smb2_read_data_length, 5419 .map_error = map_smb2_to_linux_error, 5420 .find_mid = smb2_find_mid, 5421 .check_message = smb2_check_message, 5422 .dump_detail = smb2_dump_detail, 5423 .clear_stats = smb2_clear_stats, 5424 .print_stats = smb2_print_stats, 5425 .dump_share_caps = smb2_dump_share_caps, 5426 .is_oplock_break = smb2_is_valid_oplock_break, 5427 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5428 .downgrade_oplock = smb3_downgrade_oplock, 5429 .need_neg = smb2_need_neg, 5430 .negotiate = smb2_negotiate, 5431 .negotiate_wsize = smb3_negotiate_wsize, 5432 .negotiate_rsize = smb3_negotiate_rsize, 5433 .sess_setup = SMB2_sess_setup, 5434 .logoff = SMB2_logoff, 5435 .tree_connect = SMB2_tcon, 5436 .tree_disconnect = SMB2_tdis, 5437 .qfs_tcon = smb3_qfs_tcon, 5438 .query_server_interfaces = SMB3_request_interfaces, 5439 .is_path_accessible = smb2_is_path_accessible, 5440 .can_echo = smb2_can_echo, 5441 .echo = SMB2_echo, 5442 .query_path_info = smb2_query_path_info, 5443 .query_reparse_point = smb2_query_reparse_point, 5444 .get_srv_inum = smb2_get_srv_inum, 5445 .query_file_info = smb2_query_file_info, 5446 .set_path_size = smb2_set_path_size, 5447 .set_file_size = smb2_set_file_size, 5448 .set_file_info = smb2_set_file_info, 5449 .set_compression = smb2_set_compression, 5450 .mkdir = smb2_mkdir, 5451 .mkdir_setinfo = smb2_mkdir_setinfo, 5452 .posix_mkdir = smb311_posix_mkdir, 5453 .rmdir = smb2_rmdir, 5454 .unlink = smb2_unlink, 5455 .rename = smb2_rename_path, 5456 .create_hardlink = smb2_create_hardlink, 5457 .parse_reparse_point = smb2_parse_reparse_point, 5458 .query_mf_symlink = smb3_query_mf_symlink, 5459 .create_mf_symlink = smb3_create_mf_symlink, 5460 .create_reparse_symlink = smb2_create_reparse_symlink, 5461 .open = smb2_open_file, 5462 .set_fid = smb2_set_fid, 5463 .close = smb2_close_file, 5464 .close_getattr = smb2_close_getattr, 5465 .flush = smb2_flush_file, 5466 .async_readv = smb2_async_readv, 5467 .async_writev = smb2_async_writev, 5468 .sync_read = smb2_sync_read, 5469 .sync_write = smb2_sync_write, 5470 .query_dir_first = smb2_query_dir_first, 5471 .query_dir_next = smb2_query_dir_next, 5472 .close_dir = smb2_close_dir, 5473 .calc_smb_size = smb2_calc_size, 5474 .is_status_pending = smb2_is_status_pending, 5475 .is_session_expired = smb2_is_session_expired, 5476 .oplock_response = smb2_oplock_response, 5477 .queryfs = smb311_queryfs, 5478 .mand_lock = smb2_mand_lock, 5479 .mand_unlock_range = smb2_unlock_range, 5480 .push_mand_locks = smb2_push_mandatory_locks, 5481 .get_lease_key = smb2_get_lease_key, 5482 .set_lease_key = smb2_set_lease_key, 5483 .new_lease_key = smb2_new_lease_key, 5484 .generate_signingkey = generate_smb311signingkey, 5485 .calc_signature = smb3_calc_signature, 5486 .set_integrity = smb3_set_integrity, 5487 .is_read_op = smb21_is_read_op, 5488 .set_oplock_level = smb3_set_oplock_level, 5489 .create_lease_buf = smb3_create_lease_buf, 5490 .parse_lease_buf = smb3_parse_lease_buf, 5491 .copychunk_range = smb2_copychunk_range, 5492 .duplicate_extents = smb2_duplicate_extents, 5493 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5494 .wp_retry_size = smb2_wp_retry_size, 5495 .dir_needs_close = smb2_dir_needs_close, 5496 .fallocate = smb3_fallocate, 5497 .enum_snapshots = smb3_enum_snapshots, 5498 .notify = smb3_notify, 5499 .init_transform_rq = smb3_init_transform_rq, 5500 .is_transform_hdr = smb3_is_transform_hdr, 5501 .receive_transform = smb3_receive_transform, 5502 .get_dfs_refer = smb2_get_dfs_refer, 5503 .select_sectype = smb2_select_sectype, 5504 #ifdef CONFIG_CIFS_XATTR 5505 .query_all_EAs = smb2_query_eas, 5506 .set_EA = smb2_set_ea, 5507 #endif /* CIFS_XATTR */ 5508 .get_acl = get_smb2_acl, 5509 .get_acl_by_fid = get_smb2_acl_by_fid, 5510 .set_acl = set_smb2_acl, 5511 .next_header = smb2_next_header, 5512 .ioctl_query_info = smb2_ioctl_query_info, 5513 .make_node = smb2_make_node, 5514 .fiemap = smb3_fiemap, 5515 .llseek = smb3_llseek, 5516 .is_status_io_timeout = smb2_is_status_io_timeout, 5517 .is_network_name_deleted = smb2_is_network_name_deleted, 5518 }; 5519 5520 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5521 struct smb_version_values smb20_values = { 5522 .version_string = SMB20_VERSION_STRING, 5523 .protocol_id = SMB20_PROT_ID, 5524 .req_capabilities = 0, /* MBZ */ 5525 .large_lock_type = 0, 5526 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5527 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5528 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5529 .header_size = sizeof(struct smb2_hdr), 5530 .header_preamble_size = 0, 5531 .max_header_size = MAX_SMB2_HDR_SIZE, 5532 .read_rsp_size = sizeof(struct smb2_read_rsp), 5533 .lock_cmd = SMB2_LOCK, 5534 .cap_unix = 0, 5535 .cap_nt_find = SMB2_NT_FIND, 5536 .cap_large_files = SMB2_LARGE_FILES, 5537 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5538 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5539 .create_lease_size = sizeof(struct create_lease), 5540 }; 5541 #endif /* ALLOW_INSECURE_LEGACY */ 5542 5543 struct smb_version_values smb21_values = { 5544 .version_string = SMB21_VERSION_STRING, 5545 .protocol_id = SMB21_PROT_ID, 5546 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5547 .large_lock_type = 0, 5548 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5549 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5550 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5551 .header_size = sizeof(struct smb2_hdr), 5552 .header_preamble_size = 0, 5553 .max_header_size = MAX_SMB2_HDR_SIZE, 5554 .read_rsp_size = sizeof(struct smb2_read_rsp), 5555 .lock_cmd = SMB2_LOCK, 5556 .cap_unix = 0, 5557 .cap_nt_find = SMB2_NT_FIND, 5558 .cap_large_files = SMB2_LARGE_FILES, 5559 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5560 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5561 .create_lease_size = sizeof(struct create_lease), 5562 }; 5563 5564 struct smb_version_values smb3any_values = { 5565 .version_string = SMB3ANY_VERSION_STRING, 5566 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5567 .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, 5568 .large_lock_type = 0, 5569 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5570 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5571 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5572 .header_size = sizeof(struct smb2_hdr), 5573 .header_preamble_size = 0, 5574 .max_header_size = MAX_SMB2_HDR_SIZE, 5575 .read_rsp_size = sizeof(struct smb2_read_rsp), 5576 .lock_cmd = SMB2_LOCK, 5577 .cap_unix = 0, 5578 .cap_nt_find = SMB2_NT_FIND, 5579 .cap_large_files = SMB2_LARGE_FILES, 5580 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5581 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5582 .create_lease_size = sizeof(struct create_lease_v2), 5583 }; 5584 5585 struct smb_version_values smbdefault_values = { 5586 .version_string = SMBDEFAULT_VERSION_STRING, 5587 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5588 .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, 5589 .large_lock_type = 0, 5590 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5591 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5592 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5593 .header_size = sizeof(struct smb2_hdr), 5594 .header_preamble_size = 0, 5595 .max_header_size = MAX_SMB2_HDR_SIZE, 5596 .read_rsp_size = sizeof(struct smb2_read_rsp), 5597 .lock_cmd = SMB2_LOCK, 5598 .cap_unix = 0, 5599 .cap_nt_find = SMB2_NT_FIND, 5600 .cap_large_files = SMB2_LARGE_FILES, 5601 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5602 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5603 .create_lease_size = sizeof(struct create_lease_v2), 5604 }; 5605 5606 struct smb_version_values smb30_values = { 5607 .version_string = SMB30_VERSION_STRING, 5608 .protocol_id = SMB30_PROT_ID, 5609 .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, 5610 .large_lock_type = 0, 5611 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5612 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5613 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5614 .header_size = sizeof(struct smb2_hdr), 5615 .header_preamble_size = 0, 5616 .max_header_size = MAX_SMB2_HDR_SIZE, 5617 .read_rsp_size = sizeof(struct smb2_read_rsp), 5618 .lock_cmd = SMB2_LOCK, 5619 .cap_unix = 0, 5620 .cap_nt_find = SMB2_NT_FIND, 5621 .cap_large_files = SMB2_LARGE_FILES, 5622 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5623 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5624 .create_lease_size = sizeof(struct create_lease_v2), 5625 }; 5626 5627 struct smb_version_values smb302_values = { 5628 .version_string = SMB302_VERSION_STRING, 5629 .protocol_id = SMB302_PROT_ID, 5630 .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, 5631 .large_lock_type = 0, 5632 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5633 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5634 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5635 .header_size = sizeof(struct smb2_hdr), 5636 .header_preamble_size = 0, 5637 .max_header_size = MAX_SMB2_HDR_SIZE, 5638 .read_rsp_size = sizeof(struct smb2_read_rsp), 5639 .lock_cmd = SMB2_LOCK, 5640 .cap_unix = 0, 5641 .cap_nt_find = SMB2_NT_FIND, 5642 .cap_large_files = SMB2_LARGE_FILES, 5643 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5644 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5645 .create_lease_size = sizeof(struct create_lease_v2), 5646 }; 5647 5648 struct smb_version_values smb311_values = { 5649 .version_string = SMB311_VERSION_STRING, 5650 .protocol_id = SMB311_PROT_ID, 5651 .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, 5652 .large_lock_type = 0, 5653 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5654 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5655 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5656 .header_size = sizeof(struct smb2_hdr), 5657 .header_preamble_size = 0, 5658 .max_header_size = MAX_SMB2_HDR_SIZE, 5659 .read_rsp_size = sizeof(struct smb2_read_rsp), 5660 .lock_cmd = SMB2_LOCK, 5661 .cap_unix = 0, 5662 .cap_nt_find = SMB2_NT_FIND, 5663 .cap_large_files = SMB2_LARGE_FILES, 5664 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5665 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5666 .create_lease_size = sizeof(struct create_lease_v2), 5667 }; 5668