1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <uapi/linux/magic.h> 17 #include "cifsfs.h" 18 #include "cifsglob.h" 19 #include "smb2pdu.h" 20 #include "smb2proto.h" 21 #include "cifsproto.h" 22 #include "cifs_debug.h" 23 #include "cifs_unicode.h" 24 #include "smb2status.h" 25 #include "smb2glob.h" 26 #include "cifs_ioctl.h" 27 #include "smbdirect.h" 28 #include "fscache.h" 29 #include "fs_context.h" 30 #include "cached_dir.h" 31 32 /* Change credits for different ops and return the total number of credits */ 33 static int 34 change_conf(struct TCP_Server_Info *server) 35 { 36 server->credits += server->echo_credits + server->oplock_credits; 37 if (server->credits > server->max_credits) 38 server->credits = server->max_credits; 39 server->oplock_credits = server->echo_credits = 0; 40 switch (server->credits) { 41 case 0: 42 return 0; 43 case 1: 44 server->echoes = false; 45 server->oplocks = false; 46 break; 47 case 2: 48 server->echoes = true; 49 server->oplocks = false; 50 server->echo_credits = 1; 51 break; 52 default: 53 server->echoes = true; 54 if (enable_oplocks) { 55 server->oplocks = true; 56 server->oplock_credits = 1; 57 } else 58 server->oplocks = false; 59 60 server->echo_credits = 1; 61 } 62 server->credits -= server->echo_credits + server->oplock_credits; 63 return server->credits + server->echo_credits + server->oplock_credits; 64 } 65 66 static void 67 smb2_add_credits(struct TCP_Server_Info *server, 68 const struct cifs_credits *credits, const int optype) 69 { 70 int *val, rc = -1; 71 int scredits, in_flight; 72 unsigned int add = credits->value; 73 unsigned int instance = credits->instance; 74 bool reconnect_detected = false; 75 bool reconnect_with_invalid_credits = false; 76 77 spin_lock(&server->req_lock); 78 val = server->ops->get_credits_field(server, optype); 79 80 /* eg found case where write overlapping reconnect messed up credits */ 81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 82 reconnect_with_invalid_credits = true; 83 84 if ((instance == 0) || (instance == server->reconnect_instance)) 85 *val += add; 86 else 87 reconnect_detected = true; 88 89 if (*val > 65000) { 90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 91 pr_warn_once("server overflowed SMB3 credits\n"); 92 trace_smb3_overflow_credits(server->CurrentMid, 93 server->conn_id, server->hostname, *val, 94 add, server->in_flight); 95 } 96 WARN_ON_ONCE(server->in_flight == 0); 97 server->in_flight--; 98 if (server->in_flight == 0 && 99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 101 rc = change_conf(server); 102 /* 103 * Sometimes server returns 0 credits on oplock break ack - we need to 104 * rebalance credits in this case. 105 */ 106 else if (server->in_flight > 0 && server->oplock_credits == 0 && 107 server->oplocks) { 108 if (server->credits > 1) { 109 server->credits--; 110 server->oplock_credits++; 111 } 112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 114 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 115 change_conf(server); 116 117 scredits = *val; 118 in_flight = server->in_flight; 119 spin_unlock(&server->req_lock); 120 wake_up(&server->request_q); 121 122 if (reconnect_detected) { 123 trace_smb3_reconnect_detected(server->CurrentMid, 124 server->conn_id, server->hostname, scredits, add, in_flight); 125 126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 127 add, instance); 128 } 129 130 if (reconnect_with_invalid_credits) { 131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 132 server->conn_id, server->hostname, scredits, add, in_flight); 133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 134 optype, scredits, add); 135 } 136 137 spin_lock(&server->srv_lock); 138 if (server->tcpStatus == CifsNeedReconnect 139 || server->tcpStatus == CifsExiting) { 140 spin_unlock(&server->srv_lock); 141 return; 142 } 143 spin_unlock(&server->srv_lock); 144 145 switch (rc) { 146 case -1: 147 /* change_conf hasn't been executed */ 148 break; 149 case 0: 150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 151 break; 152 case 1: 153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 154 break; 155 case 2: 156 cifs_dbg(FYI, "disabling oplocks\n"); 157 break; 158 default: 159 /* change_conf rebalanced credits for different types */ 160 break; 161 } 162 163 trace_smb3_add_credits(server->CurrentMid, 164 server->conn_id, server->hostname, scredits, add, in_flight); 165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 166 } 167 168 static void 169 smb2_set_credits(struct TCP_Server_Info *server, const int val) 170 { 171 int scredits, in_flight; 172 173 spin_lock(&server->req_lock); 174 server->credits = val; 175 if (val == 1) { 176 server->reconnect_instance++; 177 /* 178 * ChannelSequence updated for all channels in primary channel so that consistent 179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 180 */ 181 if (SERVER_IS_CHAN(server)) 182 server->primary_server->channel_sequence_num++; 183 else 184 server->channel_sequence_num++; 185 } 186 scredits = server->credits; 187 in_flight = server->in_flight; 188 spin_unlock(&server->req_lock); 189 190 trace_smb3_set_credits(server->CurrentMid, 191 server->conn_id, server->hostname, scredits, val, in_flight); 192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 193 194 /* don't log while holding the lock */ 195 if (val == 1) 196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 197 } 198 199 static int * 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 201 { 202 switch (optype) { 203 case CIFS_ECHO_OP: 204 return &server->echo_credits; 205 case CIFS_OBREAK_OP: 206 return &server->oplock_credits; 207 default: 208 return &server->credits; 209 } 210 } 211 212 static unsigned int 213 smb2_get_credits(struct mid_q_entry *mid) 214 { 215 return mid->credits_received; 216 } 217 218 static int 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 220 unsigned int *num, struct cifs_credits *credits) 221 { 222 int rc = 0; 223 unsigned int scredits, in_flight; 224 225 spin_lock(&server->req_lock); 226 while (1) { 227 spin_unlock(&server->req_lock); 228 229 spin_lock(&server->srv_lock); 230 if (server->tcpStatus == CifsExiting) { 231 spin_unlock(&server->srv_lock); 232 return -ENOENT; 233 } 234 spin_unlock(&server->srv_lock); 235 236 spin_lock(&server->req_lock); 237 if (server->credits <= 0) { 238 spin_unlock(&server->req_lock); 239 cifs_num_waiters_inc(server); 240 rc = wait_event_killable(server->request_q, 241 has_credits(server, &server->credits, 1)); 242 cifs_num_waiters_dec(server); 243 if (rc) 244 return rc; 245 spin_lock(&server->req_lock); 246 } else { 247 scredits = server->credits; 248 /* can deadlock with reopen */ 249 if (scredits <= 8) { 250 *num = SMB2_MAX_BUFFER_SIZE; 251 credits->value = 0; 252 credits->instance = 0; 253 break; 254 } 255 256 /* leave some credits for reopen and other ops */ 257 scredits -= 8; 258 *num = min_t(unsigned int, size, 259 scredits * SMB2_MAX_BUFFER_SIZE); 260 261 credits->value = 262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 263 credits->instance = server->reconnect_instance; 264 server->credits -= credits->value; 265 server->in_flight++; 266 if (server->in_flight > server->max_in_flight) 267 server->max_in_flight = server->in_flight; 268 break; 269 } 270 } 271 scredits = server->credits; 272 in_flight = server->in_flight; 273 spin_unlock(&server->req_lock); 274 275 trace_smb3_wait_credits(server->CurrentMid, 276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 278 __func__, credits->value, scredits); 279 280 return rc; 281 } 282 283 static int 284 smb2_adjust_credits(struct TCP_Server_Info *server, 285 struct cifs_credits *credits, 286 const unsigned int payload_size) 287 { 288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 289 int scredits, in_flight; 290 291 if (!credits->value || credits->value == new_val) 292 return 0; 293 294 if (credits->value < new_val) { 295 trace_smb3_too_many_credits(server->CurrentMid, 296 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 298 credits->value, new_val); 299 300 return -EOPNOTSUPP; 301 } 302 303 spin_lock(&server->req_lock); 304 305 if (server->reconnect_instance != credits->instance) { 306 scredits = server->credits; 307 in_flight = server->in_flight; 308 spin_unlock(&server->req_lock); 309 310 trace_smb3_reconnect_detected(server->CurrentMid, 311 server->conn_id, server->hostname, scredits, 312 credits->value - new_val, in_flight); 313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 314 credits->value - new_val); 315 return -EAGAIN; 316 } 317 318 server->credits += credits->value - new_val; 319 scredits = server->credits; 320 in_flight = server->in_flight; 321 spin_unlock(&server->req_lock); 322 wake_up(&server->request_q); 323 324 trace_smb3_adj_credits(server->CurrentMid, 325 server->conn_id, server->hostname, scredits, 326 credits->value - new_val, in_flight); 327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 328 __func__, credits->value - new_val, scredits); 329 330 credits->value = new_val; 331 332 return 0; 333 } 334 335 static __u64 336 smb2_get_next_mid(struct TCP_Server_Info *server) 337 { 338 __u64 mid; 339 /* for SMB2 we need the current value */ 340 spin_lock(&server->mid_lock); 341 mid = server->CurrentMid++; 342 spin_unlock(&server->mid_lock); 343 return mid; 344 } 345 346 static void 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 348 { 349 spin_lock(&server->mid_lock); 350 if (server->CurrentMid >= val) 351 server->CurrentMid -= val; 352 spin_unlock(&server->mid_lock); 353 } 354 355 static struct mid_q_entry * 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 357 { 358 struct mid_q_entry *mid; 359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 360 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 361 362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 364 return NULL; 365 } 366 367 spin_lock(&server->mid_lock); 368 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 369 if ((mid->mid == wire_mid) && 370 (mid->mid_state == MID_REQUEST_SUBMITTED) && 371 (mid->command == shdr->Command)) { 372 kref_get(&mid->refcount); 373 if (dequeue) { 374 list_del_init(&mid->qhead); 375 mid->mid_flags |= MID_DELETED; 376 } 377 spin_unlock(&server->mid_lock); 378 return mid; 379 } 380 } 381 spin_unlock(&server->mid_lock); 382 return NULL; 383 } 384 385 static struct mid_q_entry * 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 387 { 388 return __smb2_find_mid(server, buf, false); 389 } 390 391 static struct mid_q_entry * 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 393 { 394 return __smb2_find_mid(server, buf, true); 395 } 396 397 static void 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 399 { 400 #ifdef CONFIG_CIFS_DEBUG2 401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 402 403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 405 shdr->Id.SyncId.ProcessId); 406 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 407 server->ops->calc_smb_size(buf)); 408 #endif 409 } 410 411 static bool 412 smb2_need_neg(struct TCP_Server_Info *server) 413 { 414 return server->max_read == 0; 415 } 416 417 static int 418 smb2_negotiate(const unsigned int xid, 419 struct cifs_ses *ses, 420 struct TCP_Server_Info *server) 421 { 422 int rc; 423 424 spin_lock(&server->mid_lock); 425 server->CurrentMid = 0; 426 spin_unlock(&server->mid_lock); 427 rc = SMB2_negotiate(xid, ses, server); 428 /* BB we probably don't need to retry with modern servers */ 429 if (rc == -EAGAIN) 430 rc = -EHOSTDOWN; 431 return rc; 432 } 433 434 static unsigned int 435 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 436 { 437 struct TCP_Server_Info *server = tcon->ses->server; 438 unsigned int wsize; 439 440 /* start with specified wsize, or default */ 441 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 442 wsize = min_t(unsigned int, wsize, server->max_write); 443 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 444 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 445 446 return wsize; 447 } 448 449 static unsigned int 450 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 451 { 452 struct TCP_Server_Info *server = tcon->ses->server; 453 unsigned int wsize; 454 455 /* start with specified wsize, or default */ 456 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 457 wsize = min_t(unsigned int, wsize, server->max_write); 458 #ifdef CONFIG_CIFS_SMB_DIRECT 459 if (server->rdma) { 460 if (server->sign) 461 /* 462 * Account for SMB2 data transfer packet header and 463 * possible encryption header 464 */ 465 wsize = min_t(unsigned int, 466 wsize, 467 server->smbd_conn->max_fragmented_send_size - 468 SMB2_READWRITE_PDU_HEADER_SIZE - 469 sizeof(struct smb2_transform_hdr)); 470 else 471 wsize = min_t(unsigned int, 472 wsize, server->smbd_conn->max_readwrite_size); 473 } 474 #endif 475 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 476 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 477 478 return wsize; 479 } 480 481 static unsigned int 482 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 483 { 484 struct TCP_Server_Info *server = tcon->ses->server; 485 unsigned int rsize; 486 487 /* start with specified rsize, or default */ 488 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 489 rsize = min_t(unsigned int, rsize, server->max_read); 490 491 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 492 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 493 494 return rsize; 495 } 496 497 static unsigned int 498 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 499 { 500 struct TCP_Server_Info *server = tcon->ses->server; 501 unsigned int rsize; 502 503 /* start with specified rsize, or default */ 504 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 505 rsize = min_t(unsigned int, rsize, server->max_read); 506 #ifdef CONFIG_CIFS_SMB_DIRECT 507 if (server->rdma) { 508 if (server->sign) 509 /* 510 * Account for SMB2 data transfer packet header and 511 * possible encryption header 512 */ 513 rsize = min_t(unsigned int, 514 rsize, 515 server->smbd_conn->max_fragmented_recv_size - 516 SMB2_READWRITE_PDU_HEADER_SIZE - 517 sizeof(struct smb2_transform_hdr)); 518 else 519 rsize = min_t(unsigned int, 520 rsize, server->smbd_conn->max_readwrite_size); 521 } 522 #endif 523 524 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 525 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 526 527 return rsize; 528 } 529 530 /* 531 * compare two interfaces a and b 532 * return 0 if everything matches. 533 * return 1 if a is rdma capable, or rss capable, or has higher link speed 534 * return -1 otherwise. 535 */ 536 static int 537 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 538 { 539 int cmp_ret = 0; 540 541 WARN_ON(!a || !b); 542 if (a->rdma_capable == b->rdma_capable) { 543 if (a->rss_capable == b->rss_capable) { 544 if (a->speed == b->speed) { 545 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 546 (struct sockaddr *) &b->sockaddr); 547 if (!cmp_ret) 548 return 0; 549 else if (cmp_ret > 0) 550 return 1; 551 else 552 return -1; 553 } else if (a->speed > b->speed) 554 return 1; 555 else 556 return -1; 557 } else if (a->rss_capable > b->rss_capable) 558 return 1; 559 else 560 return -1; 561 } else if (a->rdma_capable > b->rdma_capable) 562 return 1; 563 else 564 return -1; 565 } 566 567 static int 568 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 569 size_t buf_len, struct cifs_ses *ses, bool in_mount) 570 { 571 struct network_interface_info_ioctl_rsp *p; 572 struct sockaddr_in *addr4; 573 struct sockaddr_in6 *addr6; 574 struct iface_info_ipv4 *p4; 575 struct iface_info_ipv6 *p6; 576 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 577 struct cifs_server_iface tmp_iface; 578 ssize_t bytes_left; 579 size_t next = 0; 580 int nb_iface = 0; 581 int rc = 0, ret = 0; 582 583 bytes_left = buf_len; 584 p = buf; 585 586 spin_lock(&ses->iface_lock); 587 /* do not query too frequently, this time with lock held */ 588 if (ses->iface_last_update && 589 time_before(jiffies, ses->iface_last_update + 590 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 591 spin_unlock(&ses->iface_lock); 592 return 0; 593 } 594 595 /* 596 * Go through iface_list and do kref_put to remove 597 * any unused ifaces. ifaces in use will be removed 598 * when the last user calls a kref_put on it 599 */ 600 list_for_each_entry_safe(iface, niface, &ses->iface_list, 601 iface_head) { 602 iface->is_active = 0; 603 kref_put(&iface->refcount, release_iface); 604 ses->iface_count--; 605 } 606 spin_unlock(&ses->iface_lock); 607 608 /* 609 * Samba server e.g. can return an empty interface list in some cases, 610 * which would only be a problem if we were requesting multichannel 611 */ 612 if (bytes_left == 0) { 613 /* avoid spamming logs every 10 minutes, so log only in mount */ 614 if ((ses->chan_max > 1) && in_mount) 615 cifs_dbg(VFS, 616 "multichannel not available\n" 617 "Empty network interface list returned by server %s\n", 618 ses->server->hostname); 619 rc = -EINVAL; 620 goto out; 621 } 622 623 while (bytes_left >= 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 /* just get a ref so that it doesn't get picked/freed */ 680 iface->is_active = 1; 681 kref_get(&iface->refcount); 682 ses->iface_count++; 683 spin_unlock(&ses->iface_lock); 684 goto next_iface; 685 } else if (ret < 0) { 686 /* all remaining ifaces are slower */ 687 kref_get(&iface->refcount); 688 break; 689 } 690 } 691 spin_unlock(&ses->iface_lock); 692 693 /* no match. insert the entry in the list */ 694 info = kmalloc(sizeof(struct cifs_server_iface), 695 GFP_KERNEL); 696 if (!info) { 697 rc = -ENOMEM; 698 goto out; 699 } 700 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 701 702 /* add this new entry to the list */ 703 kref_init(&info->refcount); 704 info->is_active = 1; 705 706 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 707 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 708 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 709 le32_to_cpu(p->Capability)); 710 711 spin_lock(&ses->iface_lock); 712 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 713 list_add_tail(&info->iface_head, &iface->iface_head); 714 kref_put(&iface->refcount, release_iface); 715 } else 716 list_add_tail(&info->iface_head, &ses->iface_list); 717 718 ses->iface_count++; 719 spin_unlock(&ses->iface_lock); 720 ses->iface_last_update = jiffies; 721 next_iface: 722 nb_iface++; 723 next = le32_to_cpu(p->Next); 724 if (!next) { 725 bytes_left -= sizeof(*p); 726 break; 727 } 728 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 729 bytes_left -= next; 730 } 731 732 if (!nb_iface) { 733 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 734 rc = -EINVAL; 735 goto out; 736 } 737 738 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 739 if ((bytes_left > 8) || p->Next) 740 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 741 742 743 if (!ses->iface_count) { 744 rc = -EINVAL; 745 goto out; 746 } 747 748 out: 749 return rc; 750 } 751 752 int 753 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 754 { 755 int rc; 756 unsigned int ret_data_len = 0; 757 struct network_interface_info_ioctl_rsp *out_buf = NULL; 758 struct cifs_ses *ses = tcon->ses; 759 struct TCP_Server_Info *pserver; 760 761 /* do not query too frequently */ 762 if (ses->iface_last_update && 763 time_before(jiffies, ses->iface_last_update + 764 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 765 return 0; 766 767 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 768 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 769 NULL /* no data input */, 0 /* no data input */, 770 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 771 if (rc == -EOPNOTSUPP) { 772 cifs_dbg(FYI, 773 "server does not support query network interfaces\n"); 774 ret_data_len = 0; 775 } else if (rc != 0) { 776 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 777 goto out; 778 } 779 780 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 781 if (rc) 782 goto out; 783 784 /* check if iface is still active */ 785 pserver = ses->chans[0].server; 786 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) 787 cifs_chan_update_iface(ses, pserver); 788 789 out: 790 kfree(out_buf); 791 return rc; 792 } 793 794 static void 795 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 796 struct cifs_sb_info *cifs_sb) 797 { 798 int rc; 799 __le16 srch_path = 0; /* Null - open root of share */ 800 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 801 struct cifs_open_parms oparms; 802 struct cifs_fid fid; 803 struct cached_fid *cfid = NULL; 804 805 oparms = (struct cifs_open_parms) { 806 .tcon = tcon, 807 .path = "", 808 .desired_access = FILE_READ_ATTRIBUTES, 809 .disposition = FILE_OPEN, 810 .create_options = cifs_create_options(cifs_sb, 0), 811 .fid = &fid, 812 }; 813 814 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 815 if (rc == 0) 816 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 817 else 818 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 819 NULL, NULL); 820 if (rc) 821 return; 822 823 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 824 825 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 826 FS_ATTRIBUTE_INFORMATION); 827 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 828 FS_DEVICE_INFORMATION); 829 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 830 FS_VOLUME_INFORMATION); 831 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 832 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 833 if (cfid == NULL) 834 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 835 else 836 close_cached_dir(cfid); 837 } 838 839 static void 840 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 841 struct cifs_sb_info *cifs_sb) 842 { 843 int rc; 844 __le16 srch_path = 0; /* Null - open root of share */ 845 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 846 struct cifs_open_parms oparms; 847 struct cifs_fid fid; 848 849 oparms = (struct cifs_open_parms) { 850 .tcon = tcon, 851 .path = "", 852 .desired_access = FILE_READ_ATTRIBUTES, 853 .disposition = FILE_OPEN, 854 .create_options = cifs_create_options(cifs_sb, 0), 855 .fid = &fid, 856 }; 857 858 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 859 NULL, NULL); 860 if (rc) 861 return; 862 863 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 864 FS_ATTRIBUTE_INFORMATION); 865 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 866 FS_DEVICE_INFORMATION); 867 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 868 } 869 870 static int 871 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 872 struct cifs_sb_info *cifs_sb, const char *full_path) 873 { 874 __le16 *utf16_path; 875 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 876 int err_buftype = CIFS_NO_BUFFER; 877 struct cifs_open_parms oparms; 878 struct kvec err_iov = {}; 879 struct cifs_fid fid; 880 struct cached_fid *cfid; 881 bool islink; 882 int rc, rc2; 883 884 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 885 if (!rc) { 886 if (cfid->has_lease) { 887 close_cached_dir(cfid); 888 return 0; 889 } 890 close_cached_dir(cfid); 891 } 892 893 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 894 if (!utf16_path) 895 return -ENOMEM; 896 897 oparms = (struct cifs_open_parms) { 898 .tcon = tcon, 899 .path = full_path, 900 .desired_access = FILE_READ_ATTRIBUTES, 901 .disposition = FILE_OPEN, 902 .create_options = cifs_create_options(cifs_sb, 0), 903 .fid = &fid, 904 }; 905 906 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 907 &err_iov, &err_buftype); 908 if (rc) { 909 struct smb2_hdr *hdr = err_iov.iov_base; 910 911 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 912 goto out; 913 914 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 915 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 916 full_path, &islink); 917 if (rc2) { 918 rc = rc2; 919 goto out; 920 } 921 if (islink) 922 rc = -EREMOTE; 923 } 924 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 925 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 926 rc = -EOPNOTSUPP; 927 goto out; 928 } 929 930 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 931 932 out: 933 free_rsp_buf(err_buftype, err_iov.iov_base); 934 kfree(utf16_path); 935 return rc; 936 } 937 938 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 939 struct cifs_sb_info *cifs_sb, const char *full_path, 940 u64 *uniqueid, struct cifs_open_info_data *data) 941 { 942 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 943 return 0; 944 } 945 946 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 947 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 948 { 949 struct cifs_fid *fid = &cfile->fid; 950 951 if (cfile->symlink_target) { 952 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 953 if (!data->symlink_target) 954 return -ENOMEM; 955 } 956 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 957 } 958 959 #ifdef CONFIG_CIFS_XATTR 960 static ssize_t 961 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 962 struct smb2_file_full_ea_info *src, size_t src_size, 963 const unsigned char *ea_name) 964 { 965 int rc = 0; 966 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 967 char *name, *value; 968 size_t buf_size = dst_size; 969 size_t name_len, value_len, user_name_len; 970 971 while (src_size > 0) { 972 name_len = (size_t)src->ea_name_length; 973 value_len = (size_t)le16_to_cpu(src->ea_value_length); 974 975 if (name_len == 0) 976 break; 977 978 if (src_size < 8 + name_len + 1 + value_len) { 979 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 980 rc = -EIO; 981 goto out; 982 } 983 984 name = &src->ea_data[0]; 985 value = &src->ea_data[src->ea_name_length + 1]; 986 987 if (ea_name) { 988 if (ea_name_len == name_len && 989 memcmp(ea_name, name, name_len) == 0) { 990 rc = value_len; 991 if (dst_size == 0) 992 goto out; 993 if (dst_size < value_len) { 994 rc = -ERANGE; 995 goto out; 996 } 997 memcpy(dst, value, value_len); 998 goto out; 999 } 1000 } else { 1001 /* 'user.' plus a terminating null */ 1002 user_name_len = 5 + 1 + name_len; 1003 1004 if (buf_size == 0) { 1005 /* skip copy - calc size only */ 1006 rc += user_name_len; 1007 } else if (dst_size >= user_name_len) { 1008 dst_size -= user_name_len; 1009 memcpy(dst, "user.", 5); 1010 dst += 5; 1011 memcpy(dst, src->ea_data, name_len); 1012 dst += name_len; 1013 *dst = 0; 1014 ++dst; 1015 rc += user_name_len; 1016 } else { 1017 /* stop before overrun buffer */ 1018 rc = -ERANGE; 1019 break; 1020 } 1021 } 1022 1023 if (!src->next_entry_offset) 1024 break; 1025 1026 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1027 /* stop before overrun buffer */ 1028 rc = -ERANGE; 1029 break; 1030 } 1031 src_size -= le32_to_cpu(src->next_entry_offset); 1032 src = (void *)((char *)src + 1033 le32_to_cpu(src->next_entry_offset)); 1034 } 1035 1036 /* didn't find the named attribute */ 1037 if (ea_name) 1038 rc = -ENODATA; 1039 1040 out: 1041 return (ssize_t)rc; 1042 } 1043 1044 static ssize_t 1045 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1046 const unsigned char *path, const unsigned char *ea_name, 1047 char *ea_data, size_t buf_size, 1048 struct cifs_sb_info *cifs_sb) 1049 { 1050 int rc; 1051 struct kvec rsp_iov = {NULL, 0}; 1052 int buftype = CIFS_NO_BUFFER; 1053 struct smb2_query_info_rsp *rsp; 1054 struct smb2_file_full_ea_info *info = NULL; 1055 1056 rc = smb2_query_info_compound(xid, tcon, path, 1057 FILE_READ_EA, 1058 FILE_FULL_EA_INFORMATION, 1059 SMB2_O_INFO_FILE, 1060 CIFSMaxBufSize - 1061 MAX_SMB2_CREATE_RESPONSE_SIZE - 1062 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1063 &rsp_iov, &buftype, cifs_sb); 1064 if (rc) { 1065 /* 1066 * If ea_name is NULL (listxattr) and there are no EAs, 1067 * return 0 as it's not an error. Otherwise, the specified 1068 * ea_name was not found. 1069 */ 1070 if (!ea_name && rc == -ENODATA) 1071 rc = 0; 1072 goto qeas_exit; 1073 } 1074 1075 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1076 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1077 le32_to_cpu(rsp->OutputBufferLength), 1078 &rsp_iov, 1079 sizeof(struct smb2_file_full_ea_info)); 1080 if (rc) 1081 goto qeas_exit; 1082 1083 info = (struct smb2_file_full_ea_info *)( 1084 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1085 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1086 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1087 1088 qeas_exit: 1089 free_rsp_buf(buftype, rsp_iov.iov_base); 1090 return rc; 1091 } 1092 1093 static int 1094 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1095 const char *path, const char *ea_name, const void *ea_value, 1096 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1097 struct cifs_sb_info *cifs_sb) 1098 { 1099 struct smb2_compound_vars *vars; 1100 struct cifs_ses *ses = tcon->ses; 1101 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1102 struct smb_rqst *rqst; 1103 struct kvec *rsp_iov; 1104 __le16 *utf16_path = NULL; 1105 int ea_name_len = strlen(ea_name); 1106 int flags = CIFS_CP_CREATE_CLOSE_OP; 1107 int len; 1108 int resp_buftype[3]; 1109 struct cifs_open_parms oparms; 1110 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1111 struct cifs_fid fid; 1112 unsigned int size[1]; 1113 void *data[1]; 1114 struct smb2_file_full_ea_info *ea = NULL; 1115 struct smb2_query_info_rsp *rsp; 1116 int rc, used_len = 0; 1117 1118 if (smb3_encryption_required(tcon)) 1119 flags |= CIFS_TRANSFORM_REQ; 1120 1121 if (ea_name_len > 255) 1122 return -EINVAL; 1123 1124 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1125 if (!utf16_path) 1126 return -ENOMEM; 1127 1128 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1129 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1130 if (!vars) { 1131 rc = -ENOMEM; 1132 goto out_free_path; 1133 } 1134 rqst = vars->rqst; 1135 rsp_iov = vars->rsp_iov; 1136 1137 if (ses->server->ops->query_all_EAs) { 1138 if (!ea_value) { 1139 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1140 ea_name, NULL, 0, 1141 cifs_sb); 1142 if (rc == -ENODATA) 1143 goto sea_exit; 1144 } else { 1145 /* If we are adding a attribute we should first check 1146 * if there will be enough space available to store 1147 * the new EA. If not we should not add it since we 1148 * would not be able to even read the EAs back. 1149 */ 1150 rc = smb2_query_info_compound(xid, tcon, path, 1151 FILE_READ_EA, 1152 FILE_FULL_EA_INFORMATION, 1153 SMB2_O_INFO_FILE, 1154 CIFSMaxBufSize - 1155 MAX_SMB2_CREATE_RESPONSE_SIZE - 1156 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1157 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1158 if (rc == 0) { 1159 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1160 used_len = le32_to_cpu(rsp->OutputBufferLength); 1161 } 1162 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1163 resp_buftype[1] = CIFS_NO_BUFFER; 1164 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1165 rc = 0; 1166 1167 /* Use a fudge factor of 256 bytes in case we collide 1168 * with a different set_EAs command. 1169 */ 1170 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1171 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1172 used_len + ea_name_len + ea_value_len + 1) { 1173 rc = -ENOSPC; 1174 goto sea_exit; 1175 } 1176 } 1177 } 1178 1179 /* Open */ 1180 rqst[0].rq_iov = vars->open_iov; 1181 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1182 1183 oparms = (struct cifs_open_parms) { 1184 .tcon = tcon, 1185 .path = path, 1186 .desired_access = FILE_WRITE_EA, 1187 .disposition = FILE_OPEN, 1188 .create_options = cifs_create_options(cifs_sb, 0), 1189 .fid = &fid, 1190 }; 1191 1192 rc = SMB2_open_init(tcon, server, 1193 &rqst[0], &oplock, &oparms, utf16_path); 1194 if (rc) 1195 goto sea_exit; 1196 smb2_set_next_command(tcon, &rqst[0]); 1197 1198 1199 /* Set Info */ 1200 rqst[1].rq_iov = vars->si_iov; 1201 rqst[1].rq_nvec = 1; 1202 1203 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1204 ea = kzalloc(len, GFP_KERNEL); 1205 if (ea == NULL) { 1206 rc = -ENOMEM; 1207 goto sea_exit; 1208 } 1209 1210 ea->ea_name_length = ea_name_len; 1211 ea->ea_value_length = cpu_to_le16(ea_value_len); 1212 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1213 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1214 1215 size[0] = len; 1216 data[0] = ea; 1217 1218 rc = SMB2_set_info_init(tcon, server, 1219 &rqst[1], COMPOUND_FID, 1220 COMPOUND_FID, current->tgid, 1221 FILE_FULL_EA_INFORMATION, 1222 SMB2_O_INFO_FILE, 0, data, size); 1223 if (rc) 1224 goto sea_exit; 1225 smb2_set_next_command(tcon, &rqst[1]); 1226 smb2_set_related(&rqst[1]); 1227 1228 /* Close */ 1229 rqst[2].rq_iov = &vars->close_iov; 1230 rqst[2].rq_nvec = 1; 1231 rc = SMB2_close_init(tcon, server, 1232 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1233 if (rc) 1234 goto sea_exit; 1235 smb2_set_related(&rqst[2]); 1236 1237 rc = compound_send_recv(xid, ses, server, 1238 flags, 3, rqst, 1239 resp_buftype, rsp_iov); 1240 /* no need to bump num_remote_opens because handle immediately closed */ 1241 1242 sea_exit: 1243 kfree(ea); 1244 SMB2_open_free(&rqst[0]); 1245 SMB2_set_info_free(&rqst[1]); 1246 SMB2_close_free(&rqst[2]); 1247 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1248 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1249 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1250 kfree(vars); 1251 out_free_path: 1252 kfree(utf16_path); 1253 return rc; 1254 } 1255 #endif 1256 1257 static bool 1258 smb2_can_echo(struct TCP_Server_Info *server) 1259 { 1260 return server->echoes; 1261 } 1262 1263 static void 1264 smb2_clear_stats(struct cifs_tcon *tcon) 1265 { 1266 int i; 1267 1268 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1269 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1270 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1271 } 1272 } 1273 1274 static void 1275 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1276 { 1277 seq_puts(m, "\n\tShare Capabilities:"); 1278 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1279 seq_puts(m, " DFS,"); 1280 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1281 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1282 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1283 seq_puts(m, " SCALEOUT,"); 1284 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1285 seq_puts(m, " CLUSTER,"); 1286 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1287 seq_puts(m, " ASYMMETRIC,"); 1288 if (tcon->capabilities == 0) 1289 seq_puts(m, " None"); 1290 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1291 seq_puts(m, " Aligned,"); 1292 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1293 seq_puts(m, " Partition Aligned,"); 1294 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1295 seq_puts(m, " SSD,"); 1296 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1297 seq_puts(m, " TRIM-support,"); 1298 1299 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1300 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1301 if (tcon->perf_sector_size) 1302 seq_printf(m, "\tOptimal sector size: 0x%x", 1303 tcon->perf_sector_size); 1304 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1305 } 1306 1307 static void 1308 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1309 { 1310 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1311 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1312 1313 /* 1314 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1315 * totals (requests sent) since those SMBs are per-session not per tcon 1316 */ 1317 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1318 (long long)(tcon->bytes_read), 1319 (long long)(tcon->bytes_written)); 1320 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1321 atomic_read(&tcon->num_local_opens), 1322 atomic_read(&tcon->num_remote_opens)); 1323 seq_printf(m, "\nTreeConnects: %d total %d failed", 1324 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1325 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1326 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1327 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1328 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1329 seq_printf(m, "\nCreates: %d total %d failed", 1330 atomic_read(&sent[SMB2_CREATE_HE]), 1331 atomic_read(&failed[SMB2_CREATE_HE])); 1332 seq_printf(m, "\nCloses: %d total %d failed", 1333 atomic_read(&sent[SMB2_CLOSE_HE]), 1334 atomic_read(&failed[SMB2_CLOSE_HE])); 1335 seq_printf(m, "\nFlushes: %d total %d failed", 1336 atomic_read(&sent[SMB2_FLUSH_HE]), 1337 atomic_read(&failed[SMB2_FLUSH_HE])); 1338 seq_printf(m, "\nReads: %d total %d failed", 1339 atomic_read(&sent[SMB2_READ_HE]), 1340 atomic_read(&failed[SMB2_READ_HE])); 1341 seq_printf(m, "\nWrites: %d total %d failed", 1342 atomic_read(&sent[SMB2_WRITE_HE]), 1343 atomic_read(&failed[SMB2_WRITE_HE])); 1344 seq_printf(m, "\nLocks: %d total %d failed", 1345 atomic_read(&sent[SMB2_LOCK_HE]), 1346 atomic_read(&failed[SMB2_LOCK_HE])); 1347 seq_printf(m, "\nIOCTLs: %d total %d failed", 1348 atomic_read(&sent[SMB2_IOCTL_HE]), 1349 atomic_read(&failed[SMB2_IOCTL_HE])); 1350 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1351 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1352 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1353 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1354 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1355 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1356 seq_printf(m, "\nQueryInfos: %d total %d failed", 1357 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1358 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1359 seq_printf(m, "\nSetInfos: %d total %d failed", 1360 atomic_read(&sent[SMB2_SET_INFO_HE]), 1361 atomic_read(&failed[SMB2_SET_INFO_HE])); 1362 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1363 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1364 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1365 } 1366 1367 static void 1368 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1369 { 1370 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1371 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1372 1373 cfile->fid.persistent_fid = fid->persistent_fid; 1374 cfile->fid.volatile_fid = fid->volatile_fid; 1375 cfile->fid.access = fid->access; 1376 #ifdef CONFIG_CIFS_DEBUG2 1377 cfile->fid.mid = fid->mid; 1378 #endif /* CIFS_DEBUG2 */ 1379 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1380 &fid->purge_cache); 1381 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1382 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1383 } 1384 1385 static void 1386 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1387 struct cifs_fid *fid) 1388 { 1389 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1390 } 1391 1392 static void 1393 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1394 struct cifsFileInfo *cfile) 1395 { 1396 struct smb2_file_network_open_info file_inf; 1397 struct inode *inode; 1398 int rc; 1399 1400 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1401 cfile->fid.volatile_fid, &file_inf); 1402 if (rc) 1403 return; 1404 1405 inode = d_inode(cfile->dentry); 1406 1407 spin_lock(&inode->i_lock); 1408 CIFS_I(inode)->time = jiffies; 1409 1410 /* Creation time should not need to be updated on close */ 1411 if (file_inf.LastWriteTime) 1412 inode_set_mtime_to_ts(inode, 1413 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1414 if (file_inf.ChangeTime) 1415 inode_set_ctime_to_ts(inode, 1416 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1417 if (file_inf.LastAccessTime) 1418 inode_set_atime_to_ts(inode, 1419 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1420 1421 /* 1422 * i_blocks is not related to (i_size / i_blksize), 1423 * but instead 512 byte (2**9) size is required for 1424 * calculating num blocks. 1425 */ 1426 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1427 inode->i_blocks = 1428 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1429 1430 /* End of file and Attributes should not have to be updated on close */ 1431 spin_unlock(&inode->i_lock); 1432 } 1433 1434 static int 1435 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1436 u64 persistent_fid, u64 volatile_fid, 1437 struct copychunk_ioctl *pcchunk) 1438 { 1439 int rc; 1440 unsigned int ret_data_len; 1441 struct resume_key_req *res_key; 1442 1443 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1444 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1445 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1446 1447 if (rc == -EOPNOTSUPP) { 1448 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1449 goto req_res_key_exit; 1450 } else if (rc) { 1451 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1452 goto req_res_key_exit; 1453 } 1454 if (ret_data_len < sizeof(struct resume_key_req)) { 1455 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1456 rc = -EINVAL; 1457 goto req_res_key_exit; 1458 } 1459 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1460 1461 req_res_key_exit: 1462 kfree(res_key); 1463 return rc; 1464 } 1465 1466 static int 1467 smb2_ioctl_query_info(const unsigned int xid, 1468 struct cifs_tcon *tcon, 1469 struct cifs_sb_info *cifs_sb, 1470 __le16 *path, int is_dir, 1471 unsigned long p) 1472 { 1473 struct smb2_compound_vars *vars; 1474 struct smb_rqst *rqst; 1475 struct kvec *rsp_iov; 1476 struct cifs_ses *ses = tcon->ses; 1477 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1478 char __user *arg = (char __user *)p; 1479 struct smb_query_info qi; 1480 struct smb_query_info __user *pqi; 1481 int rc = 0; 1482 int flags = CIFS_CP_CREATE_CLOSE_OP; 1483 struct smb2_query_info_rsp *qi_rsp = NULL; 1484 struct smb2_ioctl_rsp *io_rsp = NULL; 1485 void *buffer = NULL; 1486 int resp_buftype[3]; 1487 struct cifs_open_parms oparms; 1488 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1489 struct cifs_fid fid; 1490 unsigned int size[2]; 1491 void *data[2]; 1492 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1493 void (*free_req1_func)(struct smb_rqst *r); 1494 1495 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1496 if (vars == NULL) 1497 return -ENOMEM; 1498 rqst = &vars->rqst[0]; 1499 rsp_iov = &vars->rsp_iov[0]; 1500 1501 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1502 1503 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1504 rc = -EFAULT; 1505 goto free_vars; 1506 } 1507 if (qi.output_buffer_length > 1024) { 1508 rc = -EINVAL; 1509 goto free_vars; 1510 } 1511 1512 if (!ses || !server) { 1513 rc = -EIO; 1514 goto free_vars; 1515 } 1516 1517 if (smb3_encryption_required(tcon)) 1518 flags |= CIFS_TRANSFORM_REQ; 1519 1520 if (qi.output_buffer_length) { 1521 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1522 if (IS_ERR(buffer)) { 1523 rc = PTR_ERR(buffer); 1524 goto free_vars; 1525 } 1526 } 1527 1528 /* Open */ 1529 rqst[0].rq_iov = &vars->open_iov[0]; 1530 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1531 1532 oparms = (struct cifs_open_parms) { 1533 .tcon = tcon, 1534 .disposition = FILE_OPEN, 1535 .create_options = cifs_create_options(cifs_sb, create_options), 1536 .fid = &fid, 1537 }; 1538 1539 if (qi.flags & PASSTHRU_FSCTL) { 1540 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1541 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1542 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1543 break; 1544 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1545 oparms.desired_access = GENERIC_ALL; 1546 break; 1547 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1548 oparms.desired_access = GENERIC_READ; 1549 break; 1550 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1551 oparms.desired_access = GENERIC_WRITE; 1552 break; 1553 } 1554 } else if (qi.flags & PASSTHRU_SET_INFO) { 1555 oparms.desired_access = GENERIC_WRITE; 1556 } else { 1557 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1558 } 1559 1560 rc = SMB2_open_init(tcon, server, 1561 &rqst[0], &oplock, &oparms, path); 1562 if (rc) 1563 goto free_output_buffer; 1564 smb2_set_next_command(tcon, &rqst[0]); 1565 1566 /* Query */ 1567 if (qi.flags & PASSTHRU_FSCTL) { 1568 /* Can eventually relax perm check since server enforces too */ 1569 if (!capable(CAP_SYS_ADMIN)) { 1570 rc = -EPERM; 1571 goto free_open_req; 1572 } 1573 rqst[1].rq_iov = &vars->io_iov[0]; 1574 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1575 1576 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1577 qi.info_type, buffer, qi.output_buffer_length, 1578 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1579 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1580 free_req1_func = SMB2_ioctl_free; 1581 } else if (qi.flags == PASSTHRU_SET_INFO) { 1582 /* Can eventually relax perm check since server enforces too */ 1583 if (!capable(CAP_SYS_ADMIN)) { 1584 rc = -EPERM; 1585 goto free_open_req; 1586 } 1587 if (qi.output_buffer_length < 8) { 1588 rc = -EINVAL; 1589 goto free_open_req; 1590 } 1591 rqst[1].rq_iov = vars->si_iov; 1592 rqst[1].rq_nvec = 1; 1593 1594 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1595 size[0] = 8; 1596 data[0] = buffer; 1597 1598 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1599 current->tgid, FILE_END_OF_FILE_INFORMATION, 1600 SMB2_O_INFO_FILE, 0, data, size); 1601 free_req1_func = SMB2_set_info_free; 1602 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1603 rqst[1].rq_iov = &vars->qi_iov; 1604 rqst[1].rq_nvec = 1; 1605 1606 rc = SMB2_query_info_init(tcon, server, 1607 &rqst[1], COMPOUND_FID, 1608 COMPOUND_FID, qi.file_info_class, 1609 qi.info_type, qi.additional_information, 1610 qi.input_buffer_length, 1611 qi.output_buffer_length, buffer); 1612 free_req1_func = SMB2_query_info_free; 1613 } else { /* unknown flags */ 1614 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1615 qi.flags); 1616 rc = -EINVAL; 1617 } 1618 1619 if (rc) 1620 goto free_open_req; 1621 smb2_set_next_command(tcon, &rqst[1]); 1622 smb2_set_related(&rqst[1]); 1623 1624 /* Close */ 1625 rqst[2].rq_iov = &vars->close_iov; 1626 rqst[2].rq_nvec = 1; 1627 1628 rc = SMB2_close_init(tcon, server, 1629 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1630 if (rc) 1631 goto free_req_1; 1632 smb2_set_related(&rqst[2]); 1633 1634 rc = compound_send_recv(xid, ses, server, 1635 flags, 3, rqst, 1636 resp_buftype, rsp_iov); 1637 if (rc) 1638 goto out; 1639 1640 /* No need to bump num_remote_opens since handle immediately closed */ 1641 if (qi.flags & PASSTHRU_FSCTL) { 1642 pqi = (struct smb_query_info __user *)arg; 1643 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1644 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1645 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1646 if (qi.input_buffer_length > 0 && 1647 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1648 > rsp_iov[1].iov_len) { 1649 rc = -EFAULT; 1650 goto out; 1651 } 1652 1653 if (copy_to_user(&pqi->input_buffer_length, 1654 &qi.input_buffer_length, 1655 sizeof(qi.input_buffer_length))) { 1656 rc = -EFAULT; 1657 goto out; 1658 } 1659 1660 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1661 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1662 qi.input_buffer_length)) 1663 rc = -EFAULT; 1664 } else { 1665 pqi = (struct smb_query_info __user *)arg; 1666 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1667 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1668 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1669 if (copy_to_user(&pqi->input_buffer_length, 1670 &qi.input_buffer_length, 1671 sizeof(qi.input_buffer_length))) { 1672 rc = -EFAULT; 1673 goto out; 1674 } 1675 1676 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1677 qi.input_buffer_length)) 1678 rc = -EFAULT; 1679 } 1680 1681 out: 1682 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1683 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1684 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1685 SMB2_close_free(&rqst[2]); 1686 free_req_1: 1687 free_req1_func(&rqst[1]); 1688 free_open_req: 1689 SMB2_open_free(&rqst[0]); 1690 free_output_buffer: 1691 kfree(buffer); 1692 free_vars: 1693 kfree(vars); 1694 return rc; 1695 } 1696 1697 static ssize_t 1698 smb2_copychunk_range(const unsigned int xid, 1699 struct cifsFileInfo *srcfile, 1700 struct cifsFileInfo *trgtfile, u64 src_off, 1701 u64 len, u64 dest_off) 1702 { 1703 int rc; 1704 unsigned int ret_data_len; 1705 struct copychunk_ioctl *pcchunk; 1706 struct copychunk_ioctl_rsp *retbuf = NULL; 1707 struct cifs_tcon *tcon; 1708 int chunks_copied = 0; 1709 bool chunk_sizes_updated = false; 1710 ssize_t bytes_written, total_bytes_written = 0; 1711 1712 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1713 if (pcchunk == NULL) 1714 return -ENOMEM; 1715 1716 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1717 /* Request a key from the server to identify the source of the copy */ 1718 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1719 srcfile->fid.persistent_fid, 1720 srcfile->fid.volatile_fid, pcchunk); 1721 1722 /* Note: request_res_key sets res_key null only if rc !=0 */ 1723 if (rc) 1724 goto cchunk_out; 1725 1726 /* For now array only one chunk long, will make more flexible later */ 1727 pcchunk->ChunkCount = cpu_to_le32(1); 1728 pcchunk->Reserved = 0; 1729 pcchunk->Reserved2 = 0; 1730 1731 tcon = tlink_tcon(trgtfile->tlink); 1732 1733 while (len > 0) { 1734 pcchunk->SourceOffset = cpu_to_le64(src_off); 1735 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1736 pcchunk->Length = 1737 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1738 1739 /* Request server copy to target from src identified by key */ 1740 kfree(retbuf); 1741 retbuf = NULL; 1742 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1743 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1744 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1745 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1746 if (rc == 0) { 1747 if (ret_data_len != 1748 sizeof(struct copychunk_ioctl_rsp)) { 1749 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1750 rc = -EIO; 1751 goto cchunk_out; 1752 } 1753 if (retbuf->TotalBytesWritten == 0) { 1754 cifs_dbg(FYI, "no bytes copied\n"); 1755 rc = -EIO; 1756 goto cchunk_out; 1757 } 1758 /* 1759 * Check if server claimed to write more than we asked 1760 */ 1761 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1762 le32_to_cpu(pcchunk->Length)) { 1763 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1764 rc = -EIO; 1765 goto cchunk_out; 1766 } 1767 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1768 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1769 rc = -EIO; 1770 goto cchunk_out; 1771 } 1772 chunks_copied++; 1773 1774 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1775 src_off += bytes_written; 1776 dest_off += bytes_written; 1777 len -= bytes_written; 1778 total_bytes_written += bytes_written; 1779 1780 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1781 le32_to_cpu(retbuf->ChunksWritten), 1782 le32_to_cpu(retbuf->ChunkBytesWritten), 1783 bytes_written); 1784 } else if (rc == -EINVAL) { 1785 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1786 goto cchunk_out; 1787 1788 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1789 le32_to_cpu(retbuf->ChunksWritten), 1790 le32_to_cpu(retbuf->ChunkBytesWritten), 1791 le32_to_cpu(retbuf->TotalBytesWritten)); 1792 1793 /* 1794 * Check if this is the first request using these sizes, 1795 * (ie check if copy succeed once with original sizes 1796 * and check if the server gave us different sizes after 1797 * we already updated max sizes on previous request). 1798 * if not then why is the server returning an error now 1799 */ 1800 if ((chunks_copied != 0) || chunk_sizes_updated) 1801 goto cchunk_out; 1802 1803 /* Check that server is not asking us to grow size */ 1804 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1805 tcon->max_bytes_chunk) 1806 tcon->max_bytes_chunk = 1807 le32_to_cpu(retbuf->ChunkBytesWritten); 1808 else 1809 goto cchunk_out; /* server gave us bogus size */ 1810 1811 /* No need to change MaxChunks since already set to 1 */ 1812 chunk_sizes_updated = true; 1813 } else 1814 goto cchunk_out; 1815 } 1816 1817 cchunk_out: 1818 kfree(pcchunk); 1819 kfree(retbuf); 1820 if (rc) 1821 return rc; 1822 else 1823 return total_bytes_written; 1824 } 1825 1826 static int 1827 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1828 struct cifs_fid *fid) 1829 { 1830 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1831 } 1832 1833 static unsigned int 1834 smb2_read_data_offset(char *buf) 1835 { 1836 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1837 1838 return rsp->DataOffset; 1839 } 1840 1841 static unsigned int 1842 smb2_read_data_length(char *buf, bool in_remaining) 1843 { 1844 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1845 1846 if (in_remaining) 1847 return le32_to_cpu(rsp->DataRemaining); 1848 1849 return le32_to_cpu(rsp->DataLength); 1850 } 1851 1852 1853 static int 1854 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1855 struct cifs_io_parms *parms, unsigned int *bytes_read, 1856 char **buf, int *buf_type) 1857 { 1858 parms->persistent_fid = pfid->persistent_fid; 1859 parms->volatile_fid = pfid->volatile_fid; 1860 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1861 } 1862 1863 static int 1864 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1865 struct cifs_io_parms *parms, unsigned int *written, 1866 struct kvec *iov, unsigned long nr_segs) 1867 { 1868 1869 parms->persistent_fid = pfid->persistent_fid; 1870 parms->volatile_fid = pfid->volatile_fid; 1871 return SMB2_write(xid, parms, written, iov, nr_segs); 1872 } 1873 1874 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1875 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1876 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1877 { 1878 struct cifsInodeInfo *cifsi; 1879 int rc; 1880 1881 cifsi = CIFS_I(inode); 1882 1883 /* if file already sparse don't bother setting sparse again */ 1884 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1885 return true; /* already sparse */ 1886 1887 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1888 return true; /* already not sparse */ 1889 1890 /* 1891 * Can't check for sparse support on share the usual way via the 1892 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1893 * since Samba server doesn't set the flag on the share, yet 1894 * supports the set sparse FSCTL and returns sparse correctly 1895 * in the file attributes. If we fail setting sparse though we 1896 * mark that server does not support sparse files for this share 1897 * to avoid repeatedly sending the unsupported fsctl to server 1898 * if the file is repeatedly extended. 1899 */ 1900 if (tcon->broken_sparse_sup) 1901 return false; 1902 1903 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1904 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1905 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1906 if (rc) { 1907 tcon->broken_sparse_sup = true; 1908 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1909 return false; 1910 } 1911 1912 if (setsparse) 1913 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1914 else 1915 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1916 1917 return true; 1918 } 1919 1920 static int 1921 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1922 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1923 { 1924 __le64 eof = cpu_to_le64(size); 1925 struct inode *inode; 1926 1927 /* 1928 * If extending file more than one page make sparse. Many Linux fs 1929 * make files sparse by default when extending via ftruncate 1930 */ 1931 inode = d_inode(cfile->dentry); 1932 1933 if (!set_alloc && (size > inode->i_size + 8192)) { 1934 __u8 set_sparse = 1; 1935 1936 /* whether set sparse succeeds or not, extend the file */ 1937 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1938 } 1939 1940 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1941 cfile->fid.volatile_fid, cfile->pid, &eof); 1942 } 1943 1944 static int 1945 smb2_duplicate_extents(const unsigned int xid, 1946 struct cifsFileInfo *srcfile, 1947 struct cifsFileInfo *trgtfile, u64 src_off, 1948 u64 len, u64 dest_off) 1949 { 1950 int rc; 1951 unsigned int ret_data_len; 1952 struct inode *inode; 1953 struct duplicate_extents_to_file dup_ext_buf; 1954 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 1955 1956 /* server fileays advertise duplicate extent support with this flag */ 1957 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 1958 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 1959 return -EOPNOTSUPP; 1960 1961 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 1962 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 1963 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 1964 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 1965 dup_ext_buf.ByteCount = cpu_to_le64(len); 1966 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 1967 src_off, dest_off, len); 1968 1969 inode = d_inode(trgtfile->dentry); 1970 if (inode->i_size < dest_off + len) { 1971 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 1972 if (rc) 1973 goto duplicate_extents_out; 1974 1975 /* 1976 * Although also could set plausible allocation size (i_blocks) 1977 * here in addition to setting the file size, in reflink 1978 * it is likely that the target file is sparse. Its allocation 1979 * size will be queried on next revalidate, but it is important 1980 * to make sure that file's cached size is updated immediately 1981 */ 1982 cifs_setsize(inode, dest_off + len); 1983 } 1984 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1985 trgtfile->fid.volatile_fid, 1986 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 1987 (char *)&dup_ext_buf, 1988 sizeof(struct duplicate_extents_to_file), 1989 CIFSMaxBufSize, NULL, 1990 &ret_data_len); 1991 1992 if (ret_data_len > 0) 1993 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 1994 1995 duplicate_extents_out: 1996 return rc; 1997 } 1998 1999 static int 2000 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2001 struct cifsFileInfo *cfile) 2002 { 2003 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2004 cfile->fid.volatile_fid); 2005 } 2006 2007 static int 2008 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2009 struct cifsFileInfo *cfile) 2010 { 2011 struct fsctl_set_integrity_information_req integr_info; 2012 unsigned int ret_data_len; 2013 2014 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2015 integr_info.Flags = 0; 2016 integr_info.Reserved = 0; 2017 2018 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2019 cfile->fid.volatile_fid, 2020 FSCTL_SET_INTEGRITY_INFORMATION, 2021 (char *)&integr_info, 2022 sizeof(struct fsctl_set_integrity_information_req), 2023 CIFSMaxBufSize, NULL, 2024 &ret_data_len); 2025 2026 } 2027 2028 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2029 #define GMT_TOKEN_SIZE 50 2030 2031 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2032 2033 /* 2034 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2035 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2036 */ 2037 static int 2038 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2039 struct cifsFileInfo *cfile, void __user *ioc_buf) 2040 { 2041 char *retbuf = NULL; 2042 unsigned int ret_data_len = 0; 2043 int rc; 2044 u32 max_response_size; 2045 struct smb_snapshot_array snapshot_in; 2046 2047 /* 2048 * On the first query to enumerate the list of snapshots available 2049 * for this volume the buffer begins with 0 (number of snapshots 2050 * which can be returned is zero since at that point we do not know 2051 * how big the buffer needs to be). On the second query, 2052 * it (ret_data_len) is set to number of snapshots so we can 2053 * know to set the maximum response size larger (see below). 2054 */ 2055 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2056 return -EFAULT; 2057 2058 /* 2059 * Note that for snapshot queries that servers like Azure expect that 2060 * the first query be minimal size (and just used to get the number/size 2061 * of previous versions) so response size must be specified as EXACTLY 2062 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2063 * of eight bytes. 2064 */ 2065 if (ret_data_len == 0) 2066 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2067 else 2068 max_response_size = CIFSMaxBufSize; 2069 2070 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2071 cfile->fid.volatile_fid, 2072 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2073 NULL, 0 /* no input data */, max_response_size, 2074 (char **)&retbuf, 2075 &ret_data_len); 2076 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2077 rc, ret_data_len); 2078 if (rc) 2079 return rc; 2080 2081 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2082 /* Fixup buffer */ 2083 if (copy_from_user(&snapshot_in, ioc_buf, 2084 sizeof(struct smb_snapshot_array))) { 2085 rc = -EFAULT; 2086 kfree(retbuf); 2087 return rc; 2088 } 2089 2090 /* 2091 * Check for min size, ie not large enough to fit even one GMT 2092 * token (snapshot). On the first ioctl some users may pass in 2093 * smaller size (or zero) to simply get the size of the array 2094 * so the user space caller can allocate sufficient memory 2095 * and retry the ioctl again with larger array size sufficient 2096 * to hold all of the snapshot GMT tokens on the second try. 2097 */ 2098 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2099 ret_data_len = sizeof(struct smb_snapshot_array); 2100 2101 /* 2102 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2103 * the snapshot array (of 50 byte GMT tokens) each 2104 * representing an available previous version of the data 2105 */ 2106 if (ret_data_len > (snapshot_in.snapshot_array_size + 2107 sizeof(struct smb_snapshot_array))) 2108 ret_data_len = snapshot_in.snapshot_array_size + 2109 sizeof(struct smb_snapshot_array); 2110 2111 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2112 rc = -EFAULT; 2113 } 2114 2115 kfree(retbuf); 2116 return rc; 2117 } 2118 2119 2120 2121 static int 2122 smb3_notify(const unsigned int xid, struct file *pfile, 2123 void __user *ioc_buf, bool return_changes) 2124 { 2125 struct smb3_notify_info notify; 2126 struct smb3_notify_info __user *pnotify_buf; 2127 struct dentry *dentry = pfile->f_path.dentry; 2128 struct inode *inode = file_inode(pfile); 2129 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2130 struct cifs_open_parms oparms; 2131 struct cifs_fid fid; 2132 struct cifs_tcon *tcon; 2133 const unsigned char *path; 2134 char *returned_ioctl_info = NULL; 2135 void *page = alloc_dentry_path(); 2136 __le16 *utf16_path = NULL; 2137 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2138 int rc = 0; 2139 __u32 ret_len = 0; 2140 2141 path = build_path_from_dentry(dentry, page); 2142 if (IS_ERR(path)) { 2143 rc = PTR_ERR(path); 2144 goto notify_exit; 2145 } 2146 2147 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2148 if (utf16_path == NULL) { 2149 rc = -ENOMEM; 2150 goto notify_exit; 2151 } 2152 2153 if (return_changes) { 2154 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2155 rc = -EFAULT; 2156 goto notify_exit; 2157 } 2158 } else { 2159 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2160 rc = -EFAULT; 2161 goto notify_exit; 2162 } 2163 notify.data_len = 0; 2164 } 2165 2166 tcon = cifs_sb_master_tcon(cifs_sb); 2167 oparms = (struct cifs_open_parms) { 2168 .tcon = tcon, 2169 .path = path, 2170 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2171 .disposition = FILE_OPEN, 2172 .create_options = cifs_create_options(cifs_sb, 0), 2173 .fid = &fid, 2174 }; 2175 2176 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2177 NULL); 2178 if (rc) 2179 goto notify_exit; 2180 2181 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2182 notify.watch_tree, notify.completion_filter, 2183 notify.data_len, &returned_ioctl_info, &ret_len); 2184 2185 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2186 2187 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2188 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2189 if (ret_len > notify.data_len) 2190 ret_len = notify.data_len; 2191 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2192 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2193 rc = -EFAULT; 2194 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2195 rc = -EFAULT; 2196 } 2197 kfree(returned_ioctl_info); 2198 notify_exit: 2199 free_dentry_path(page); 2200 kfree(utf16_path); 2201 return rc; 2202 } 2203 2204 static int 2205 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2206 const char *path, struct cifs_sb_info *cifs_sb, 2207 struct cifs_fid *fid, __u16 search_flags, 2208 struct cifs_search_info *srch_inf) 2209 { 2210 __le16 *utf16_path; 2211 struct smb_rqst rqst[2]; 2212 struct kvec rsp_iov[2]; 2213 int resp_buftype[2]; 2214 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2215 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2216 int rc, flags = 0; 2217 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2218 struct cifs_open_parms oparms; 2219 struct smb2_query_directory_rsp *qd_rsp = NULL; 2220 struct smb2_create_rsp *op_rsp = NULL; 2221 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2222 int retry_count = 0; 2223 2224 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2225 if (!utf16_path) 2226 return -ENOMEM; 2227 2228 if (smb3_encryption_required(tcon)) 2229 flags |= CIFS_TRANSFORM_REQ; 2230 2231 memset(rqst, 0, sizeof(rqst)); 2232 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2233 memset(rsp_iov, 0, sizeof(rsp_iov)); 2234 2235 /* Open */ 2236 memset(&open_iov, 0, sizeof(open_iov)); 2237 rqst[0].rq_iov = open_iov; 2238 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2239 2240 oparms = (struct cifs_open_parms) { 2241 .tcon = tcon, 2242 .path = path, 2243 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2244 .disposition = FILE_OPEN, 2245 .create_options = cifs_create_options(cifs_sb, 0), 2246 .fid = fid, 2247 }; 2248 2249 rc = SMB2_open_init(tcon, server, 2250 &rqst[0], &oplock, &oparms, utf16_path); 2251 if (rc) 2252 goto qdf_free; 2253 smb2_set_next_command(tcon, &rqst[0]); 2254 2255 /* Query directory */ 2256 srch_inf->entries_in_buffer = 0; 2257 srch_inf->index_of_last_entry = 2; 2258 2259 memset(&qd_iov, 0, sizeof(qd_iov)); 2260 rqst[1].rq_iov = qd_iov; 2261 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2262 2263 rc = SMB2_query_directory_init(xid, tcon, server, 2264 &rqst[1], 2265 COMPOUND_FID, COMPOUND_FID, 2266 0, srch_inf->info_level); 2267 if (rc) 2268 goto qdf_free; 2269 2270 smb2_set_related(&rqst[1]); 2271 2272 again: 2273 rc = compound_send_recv(xid, tcon->ses, server, 2274 flags, 2, rqst, 2275 resp_buftype, rsp_iov); 2276 2277 if (rc == -EAGAIN && retry_count++ < 10) 2278 goto again; 2279 2280 /* If the open failed there is nothing to do */ 2281 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2282 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2283 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2284 goto qdf_free; 2285 } 2286 fid->persistent_fid = op_rsp->PersistentFileId; 2287 fid->volatile_fid = op_rsp->VolatileFileId; 2288 2289 /* Anything else than ENODATA means a genuine error */ 2290 if (rc && rc != -ENODATA) { 2291 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2292 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2293 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2294 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2295 goto qdf_free; 2296 } 2297 2298 atomic_inc(&tcon->num_remote_opens); 2299 2300 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2301 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2302 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2303 tcon->tid, tcon->ses->Suid, 0, 0); 2304 srch_inf->endOfSearch = true; 2305 rc = 0; 2306 goto qdf_free; 2307 } 2308 2309 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2310 srch_inf); 2311 if (rc) { 2312 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2313 tcon->ses->Suid, 0, 0, rc); 2314 goto qdf_free; 2315 } 2316 resp_buftype[1] = CIFS_NO_BUFFER; 2317 2318 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2319 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2320 2321 qdf_free: 2322 kfree(utf16_path); 2323 SMB2_open_free(&rqst[0]); 2324 SMB2_query_directory_free(&rqst[1]); 2325 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2326 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2327 return rc; 2328 } 2329 2330 static int 2331 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2332 struct cifs_fid *fid, __u16 search_flags, 2333 struct cifs_search_info *srch_inf) 2334 { 2335 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2336 fid->volatile_fid, 0, srch_inf); 2337 } 2338 2339 static int 2340 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2341 struct cifs_fid *fid) 2342 { 2343 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2344 } 2345 2346 /* 2347 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2348 * the number of credits and return true. Otherwise - return false. 2349 */ 2350 static bool 2351 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2352 { 2353 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2354 int scredits, in_flight; 2355 2356 if (shdr->Status != STATUS_PENDING) 2357 return false; 2358 2359 if (shdr->CreditRequest) { 2360 spin_lock(&server->req_lock); 2361 server->credits += le16_to_cpu(shdr->CreditRequest); 2362 scredits = server->credits; 2363 in_flight = server->in_flight; 2364 spin_unlock(&server->req_lock); 2365 wake_up(&server->request_q); 2366 2367 trace_smb3_pend_credits(server->CurrentMid, 2368 server->conn_id, server->hostname, scredits, 2369 le16_to_cpu(shdr->CreditRequest), in_flight); 2370 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2371 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2372 } 2373 2374 return true; 2375 } 2376 2377 static bool 2378 smb2_is_session_expired(char *buf) 2379 { 2380 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2381 2382 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2383 shdr->Status != STATUS_USER_SESSION_DELETED) 2384 return false; 2385 2386 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2387 le64_to_cpu(shdr->SessionId), 2388 le16_to_cpu(shdr->Command), 2389 le64_to_cpu(shdr->MessageId)); 2390 cifs_dbg(FYI, "Session expired or deleted\n"); 2391 2392 return true; 2393 } 2394 2395 static bool 2396 smb2_is_status_io_timeout(char *buf) 2397 { 2398 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2399 2400 if (shdr->Status == STATUS_IO_TIMEOUT) 2401 return true; 2402 else 2403 return false; 2404 } 2405 2406 static bool 2407 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2408 { 2409 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2410 struct TCP_Server_Info *pserver; 2411 struct cifs_ses *ses; 2412 struct cifs_tcon *tcon; 2413 2414 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2415 return false; 2416 2417 /* If server is a channel, select the primary channel */ 2418 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2419 2420 spin_lock(&cifs_tcp_ses_lock); 2421 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2422 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2423 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2424 spin_lock(&tcon->tc_lock); 2425 tcon->need_reconnect = true; 2426 spin_unlock(&tcon->tc_lock); 2427 spin_unlock(&cifs_tcp_ses_lock); 2428 pr_warn_once("Server share %s deleted.\n", 2429 tcon->tree_name); 2430 return true; 2431 } 2432 } 2433 } 2434 spin_unlock(&cifs_tcp_ses_lock); 2435 2436 return false; 2437 } 2438 2439 static int 2440 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2441 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2442 { 2443 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2444 return SMB2_lease_break(0, tcon, cinode->lease_key, 2445 smb2_get_lease_state(cinode)); 2446 2447 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2448 CIFS_CACHE_READ(cinode) ? 1 : 0); 2449 } 2450 2451 void 2452 smb2_set_related(struct smb_rqst *rqst) 2453 { 2454 struct smb2_hdr *shdr; 2455 2456 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2457 if (shdr == NULL) { 2458 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2459 return; 2460 } 2461 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2462 } 2463 2464 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2465 2466 void 2467 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2468 { 2469 struct smb2_hdr *shdr; 2470 struct cifs_ses *ses = tcon->ses; 2471 struct TCP_Server_Info *server = ses->server; 2472 unsigned long len = smb_rqst_len(server, rqst); 2473 int i, num_padding; 2474 2475 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2476 if (shdr == NULL) { 2477 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2478 return; 2479 } 2480 2481 /* SMB headers in a compound are 8 byte aligned. */ 2482 2483 /* No padding needed */ 2484 if (!(len & 7)) 2485 goto finished; 2486 2487 num_padding = 8 - (len & 7); 2488 if (!smb3_encryption_required(tcon)) { 2489 /* 2490 * If we do not have encryption then we can just add an extra 2491 * iov for the padding. 2492 */ 2493 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2494 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2495 rqst->rq_nvec++; 2496 len += num_padding; 2497 } else { 2498 /* 2499 * We can not add a small padding iov for the encryption case 2500 * because the encryption framework can not handle the padding 2501 * iovs. 2502 * We have to flatten this into a single buffer and add 2503 * the padding to it. 2504 */ 2505 for (i = 1; i < rqst->rq_nvec; i++) { 2506 memcpy(rqst->rq_iov[0].iov_base + 2507 rqst->rq_iov[0].iov_len, 2508 rqst->rq_iov[i].iov_base, 2509 rqst->rq_iov[i].iov_len); 2510 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2511 } 2512 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2513 0, num_padding); 2514 rqst->rq_iov[0].iov_len += num_padding; 2515 len += num_padding; 2516 rqst->rq_nvec = 1; 2517 } 2518 2519 finished: 2520 shdr->NextCommand = cpu_to_le32(len); 2521 } 2522 2523 /* 2524 * Passes the query info response back to the caller on success. 2525 * Caller need to free this with free_rsp_buf(). 2526 */ 2527 int 2528 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2529 const char *path, u32 desired_access, 2530 u32 class, u32 type, u32 output_len, 2531 struct kvec *rsp, int *buftype, 2532 struct cifs_sb_info *cifs_sb) 2533 { 2534 struct smb2_compound_vars *vars; 2535 struct cifs_ses *ses = tcon->ses; 2536 struct TCP_Server_Info *server = cifs_pick_channel(ses); 2537 int flags = CIFS_CP_CREATE_CLOSE_OP; 2538 struct smb_rqst *rqst; 2539 int resp_buftype[3]; 2540 struct kvec *rsp_iov; 2541 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2542 struct cifs_open_parms oparms; 2543 struct cifs_fid fid; 2544 int rc; 2545 __le16 *utf16_path; 2546 struct cached_fid *cfid = NULL; 2547 2548 if (!path) 2549 path = ""; 2550 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2551 if (!utf16_path) 2552 return -ENOMEM; 2553 2554 if (smb3_encryption_required(tcon)) 2555 flags |= CIFS_TRANSFORM_REQ; 2556 2557 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2558 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2559 if (!vars) { 2560 rc = -ENOMEM; 2561 goto out_free_path; 2562 } 2563 rqst = vars->rqst; 2564 rsp_iov = vars->rsp_iov; 2565 2566 /* 2567 * We can only call this for things we know are directories. 2568 */ 2569 if (!strcmp(path, "")) 2570 open_cached_dir(xid, tcon, path, cifs_sb, false, 2571 &cfid); /* cfid null if open dir failed */ 2572 2573 rqst[0].rq_iov = vars->open_iov; 2574 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2575 2576 oparms = (struct cifs_open_parms) { 2577 .tcon = tcon, 2578 .path = path, 2579 .desired_access = desired_access, 2580 .disposition = FILE_OPEN, 2581 .create_options = cifs_create_options(cifs_sb, 0), 2582 .fid = &fid, 2583 }; 2584 2585 rc = SMB2_open_init(tcon, server, 2586 &rqst[0], &oplock, &oparms, utf16_path); 2587 if (rc) 2588 goto qic_exit; 2589 smb2_set_next_command(tcon, &rqst[0]); 2590 2591 rqst[1].rq_iov = &vars->qi_iov; 2592 rqst[1].rq_nvec = 1; 2593 2594 if (cfid) { 2595 rc = SMB2_query_info_init(tcon, server, 2596 &rqst[1], 2597 cfid->fid.persistent_fid, 2598 cfid->fid.volatile_fid, 2599 class, type, 0, 2600 output_len, 0, 2601 NULL); 2602 } else { 2603 rc = SMB2_query_info_init(tcon, server, 2604 &rqst[1], 2605 COMPOUND_FID, 2606 COMPOUND_FID, 2607 class, type, 0, 2608 output_len, 0, 2609 NULL); 2610 } 2611 if (rc) 2612 goto qic_exit; 2613 if (!cfid) { 2614 smb2_set_next_command(tcon, &rqst[1]); 2615 smb2_set_related(&rqst[1]); 2616 } 2617 2618 rqst[2].rq_iov = &vars->close_iov; 2619 rqst[2].rq_nvec = 1; 2620 2621 rc = SMB2_close_init(tcon, server, 2622 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2623 if (rc) 2624 goto qic_exit; 2625 smb2_set_related(&rqst[2]); 2626 2627 if (cfid) { 2628 rc = compound_send_recv(xid, ses, server, 2629 flags, 1, &rqst[1], 2630 &resp_buftype[1], &rsp_iov[1]); 2631 } else { 2632 rc = compound_send_recv(xid, ses, server, 2633 flags, 3, rqst, 2634 resp_buftype, rsp_iov); 2635 } 2636 if (rc) { 2637 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2638 if (rc == -EREMCHG) { 2639 tcon->need_reconnect = true; 2640 pr_warn_once("server share %s deleted\n", 2641 tcon->tree_name); 2642 } 2643 goto qic_exit; 2644 } 2645 *rsp = rsp_iov[1]; 2646 *buftype = resp_buftype[1]; 2647 2648 qic_exit: 2649 SMB2_open_free(&rqst[0]); 2650 SMB2_query_info_free(&rqst[1]); 2651 SMB2_close_free(&rqst[2]); 2652 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2653 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2654 if (cfid) 2655 close_cached_dir(cfid); 2656 kfree(vars); 2657 out_free_path: 2658 kfree(utf16_path); 2659 return rc; 2660 } 2661 2662 static int 2663 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2664 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2665 { 2666 struct smb2_query_info_rsp *rsp; 2667 struct smb2_fs_full_size_info *info = NULL; 2668 struct kvec rsp_iov = {NULL, 0}; 2669 int buftype = CIFS_NO_BUFFER; 2670 int rc; 2671 2672 2673 rc = smb2_query_info_compound(xid, tcon, "", 2674 FILE_READ_ATTRIBUTES, 2675 FS_FULL_SIZE_INFORMATION, 2676 SMB2_O_INFO_FILESYSTEM, 2677 sizeof(struct smb2_fs_full_size_info), 2678 &rsp_iov, &buftype, cifs_sb); 2679 if (rc) 2680 goto qfs_exit; 2681 2682 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2683 buf->f_type = SMB2_SUPER_MAGIC; 2684 info = (struct smb2_fs_full_size_info *)( 2685 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2686 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2687 le32_to_cpu(rsp->OutputBufferLength), 2688 &rsp_iov, 2689 sizeof(struct smb2_fs_full_size_info)); 2690 if (!rc) 2691 smb2_copy_fs_info_to_kstatfs(info, buf); 2692 2693 qfs_exit: 2694 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2695 free_rsp_buf(buftype, rsp_iov.iov_base); 2696 return rc; 2697 } 2698 2699 static int 2700 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2701 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2702 { 2703 int rc; 2704 __le16 srch_path = 0; /* Null - open root of share */ 2705 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2706 struct cifs_open_parms oparms; 2707 struct cifs_fid fid; 2708 2709 if (!tcon->posix_extensions) 2710 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2711 2712 oparms = (struct cifs_open_parms) { 2713 .tcon = tcon, 2714 .path = "", 2715 .desired_access = FILE_READ_ATTRIBUTES, 2716 .disposition = FILE_OPEN, 2717 .create_options = cifs_create_options(cifs_sb, 0), 2718 .fid = &fid, 2719 }; 2720 2721 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2722 NULL, NULL); 2723 if (rc) 2724 return rc; 2725 2726 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2727 fid.volatile_fid, buf); 2728 buf->f_type = SMB2_SUPER_MAGIC; 2729 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2730 return rc; 2731 } 2732 2733 static bool 2734 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2735 { 2736 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2737 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2738 } 2739 2740 static int 2741 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2742 __u64 length, __u32 type, int lock, int unlock, bool wait) 2743 { 2744 if (unlock && !lock) 2745 type = SMB2_LOCKFLAG_UNLOCK; 2746 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2747 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2748 current->tgid, length, offset, type, wait); 2749 } 2750 2751 static void 2752 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2753 { 2754 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2755 } 2756 2757 static void 2758 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2759 { 2760 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2761 } 2762 2763 static void 2764 smb2_new_lease_key(struct cifs_fid *fid) 2765 { 2766 generate_random_uuid(fid->lease_key); 2767 } 2768 2769 static int 2770 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2771 const char *search_name, 2772 struct dfs_info3_param **target_nodes, 2773 unsigned int *num_of_nodes, 2774 const struct nls_table *nls_codepage, int remap) 2775 { 2776 int rc; 2777 __le16 *utf16_path = NULL; 2778 int utf16_path_len = 0; 2779 struct cifs_tcon *tcon; 2780 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2781 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2782 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2783 int retry_count = 0; 2784 2785 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2786 2787 /* 2788 * Try to use the IPC tcon, otherwise just use any 2789 */ 2790 tcon = ses->tcon_ipc; 2791 if (tcon == NULL) { 2792 spin_lock(&cifs_tcp_ses_lock); 2793 tcon = list_first_entry_or_null(&ses->tcon_list, 2794 struct cifs_tcon, 2795 tcon_list); 2796 if (tcon) 2797 tcon->tc_count++; 2798 spin_unlock(&cifs_tcp_ses_lock); 2799 } 2800 2801 if (tcon == NULL) { 2802 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2803 ses); 2804 rc = -ENOTCONN; 2805 goto out; 2806 } 2807 2808 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2809 &utf16_path_len, 2810 nls_codepage, remap); 2811 if (!utf16_path) { 2812 rc = -ENOMEM; 2813 goto out; 2814 } 2815 2816 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2817 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2818 if (!dfs_req) { 2819 rc = -ENOMEM; 2820 goto out; 2821 } 2822 2823 /* Highest DFS referral version understood */ 2824 dfs_req->MaxReferralLevel = DFS_VERSION; 2825 2826 /* Path to resolve in an UTF-16 null-terminated string */ 2827 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2828 2829 do { 2830 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2831 FSCTL_DFS_GET_REFERRALS, 2832 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2833 (char **)&dfs_rsp, &dfs_rsp_size); 2834 if (!is_retryable_error(rc)) 2835 break; 2836 usleep_range(512, 2048); 2837 } while (++retry_count < 5); 2838 2839 if (rc) { 2840 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2841 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2842 goto out; 2843 } 2844 2845 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2846 num_of_nodes, target_nodes, 2847 nls_codepage, remap, search_name, 2848 true /* is_unicode */); 2849 if (rc) { 2850 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2851 goto out; 2852 } 2853 2854 out: 2855 if (tcon && !tcon->ipc) { 2856 /* ipc tcons are not refcounted */ 2857 spin_lock(&cifs_tcp_ses_lock); 2858 tcon->tc_count--; 2859 /* tc_count can never go negative */ 2860 WARN_ON(tcon->tc_count < 0); 2861 spin_unlock(&cifs_tcp_ses_lock); 2862 } 2863 kfree(utf16_path); 2864 kfree(dfs_req); 2865 kfree(dfs_rsp); 2866 return rc; 2867 } 2868 2869 static int 2870 parse_reparse_posix(struct reparse_posix_data *symlink_buf, 2871 u32 plen, char **target_path, 2872 struct cifs_sb_info *cifs_sb) 2873 { 2874 unsigned int len; 2875 2876 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2877 len = le16_to_cpu(symlink_buf->ReparseDataLength); 2878 2879 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) { 2880 cifs_dbg(VFS, "%lld not a supported symlink type\n", 2881 le64_to_cpu(symlink_buf->InodeType)); 2882 return -EOPNOTSUPP; 2883 } 2884 2885 *target_path = cifs_strndup_from_utf16( 2886 symlink_buf->PathBuffer, 2887 len, true, cifs_sb->local_nls); 2888 if (!(*target_path)) 2889 return -ENOMEM; 2890 2891 convert_delimiter(*target_path, '/'); 2892 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); 2893 2894 return 0; 2895 } 2896 2897 static int 2898 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf, 2899 u32 plen, char **target_path, 2900 struct cifs_sb_info *cifs_sb) 2901 { 2902 unsigned int sub_len; 2903 unsigned int sub_offset; 2904 2905 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 2906 2907 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset); 2908 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength); 2909 if (sub_offset + 20 > plen || 2910 sub_offset + sub_len + 20 > plen) { 2911 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 2912 return -EIO; 2913 } 2914 2915 *target_path = cifs_strndup_from_utf16( 2916 symlink_buf->PathBuffer + sub_offset, 2917 sub_len, true, cifs_sb->local_nls); 2918 if (!(*target_path)) 2919 return -ENOMEM; 2920 2921 convert_delimiter(*target_path, '/'); 2922 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); 2923 2924 return 0; 2925 } 2926 2927 static int 2928 parse_reparse_point(struct reparse_data_buffer *buf, 2929 u32 plen, char **target_path, 2930 struct cifs_sb_info *cifs_sb) 2931 { 2932 if (plen < sizeof(struct reparse_data_buffer)) { 2933 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n", 2934 plen); 2935 return -EIO; 2936 } 2937 2938 if (plen < le16_to_cpu(buf->ReparseDataLength) + 2939 sizeof(struct reparse_data_buffer)) { 2940 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n", 2941 plen); 2942 return -EIO; 2943 } 2944 2945 /* See MS-FSCC 2.1.2 */ 2946 switch (le32_to_cpu(buf->ReparseTag)) { 2947 case IO_REPARSE_TAG_NFS: 2948 return parse_reparse_posix( 2949 (struct reparse_posix_data *)buf, 2950 plen, target_path, cifs_sb); 2951 case IO_REPARSE_TAG_SYMLINK: 2952 return parse_reparse_symlink( 2953 (struct reparse_symlink_data_buffer *)buf, 2954 plen, target_path, cifs_sb); 2955 default: 2956 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n", 2957 le32_to_cpu(buf->ReparseTag)); 2958 return -EOPNOTSUPP; 2959 } 2960 } 2961 2962 static int smb2_query_symlink(const unsigned int xid, 2963 struct cifs_tcon *tcon, 2964 struct cifs_sb_info *cifs_sb, 2965 const char *full_path, 2966 char **target_path, 2967 struct kvec *rsp_iov) 2968 { 2969 struct reparse_data_buffer *buf; 2970 struct smb2_ioctl_rsp *io = rsp_iov->iov_base; 2971 u32 plen = le32_to_cpu(io->OutputCount); 2972 2973 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 2974 2975 buf = (struct reparse_data_buffer *)((u8 *)io + 2976 le32_to_cpu(io->OutputOffset)); 2977 return parse_reparse_point(buf, plen, target_path, cifs_sb); 2978 } 2979 2980 static int smb2_query_reparse_point(const unsigned int xid, 2981 struct cifs_tcon *tcon, 2982 struct cifs_sb_info *cifs_sb, 2983 const char *full_path, 2984 u32 *tag, struct kvec *rsp, 2985 int *rsp_buftype) 2986 { 2987 struct smb2_compound_vars *vars; 2988 int rc; 2989 __le16 *utf16_path = NULL; 2990 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2991 struct cifs_open_parms oparms; 2992 struct cifs_fid fid; 2993 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2994 int flags = CIFS_CP_CREATE_CLOSE_OP; 2995 struct smb_rqst *rqst; 2996 int resp_buftype[3]; 2997 struct kvec *rsp_iov; 2998 struct smb2_ioctl_rsp *ioctl_rsp; 2999 struct reparse_data_buffer *reparse_buf; 3000 u32 plen; 3001 3002 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 3003 3004 if (smb3_encryption_required(tcon)) 3005 flags |= CIFS_TRANSFORM_REQ; 3006 3007 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 3008 if (!utf16_path) 3009 return -ENOMEM; 3010 3011 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 3012 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 3013 if (!vars) { 3014 rc = -ENOMEM; 3015 goto out_free_path; 3016 } 3017 rqst = vars->rqst; 3018 rsp_iov = vars->rsp_iov; 3019 3020 /* 3021 * setup smb2open - TODO add optimization to call cifs_get_readable_path 3022 * to see if there is a handle already open that we can use 3023 */ 3024 rqst[0].rq_iov = vars->open_iov; 3025 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 3026 3027 oparms = (struct cifs_open_parms) { 3028 .tcon = tcon, 3029 .path = full_path, 3030 .desired_access = FILE_READ_ATTRIBUTES, 3031 .disposition = FILE_OPEN, 3032 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT), 3033 .fid = &fid, 3034 }; 3035 3036 rc = SMB2_open_init(tcon, server, 3037 &rqst[0], &oplock, &oparms, utf16_path); 3038 if (rc) 3039 goto query_rp_exit; 3040 smb2_set_next_command(tcon, &rqst[0]); 3041 3042 3043 /* IOCTL */ 3044 rqst[1].rq_iov = vars->io_iov; 3045 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 3046 3047 rc = SMB2_ioctl_init(tcon, server, 3048 &rqst[1], COMPOUND_FID, 3049 COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0, 3050 CIFSMaxBufSize - 3051 MAX_SMB2_CREATE_RESPONSE_SIZE - 3052 MAX_SMB2_CLOSE_RESPONSE_SIZE); 3053 if (rc) 3054 goto query_rp_exit; 3055 3056 smb2_set_next_command(tcon, &rqst[1]); 3057 smb2_set_related(&rqst[1]); 3058 3059 /* Close */ 3060 rqst[2].rq_iov = &vars->close_iov; 3061 rqst[2].rq_nvec = 1; 3062 3063 rc = SMB2_close_init(tcon, server, 3064 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 3065 if (rc) 3066 goto query_rp_exit; 3067 3068 smb2_set_related(&rqst[2]); 3069 3070 rc = compound_send_recv(xid, tcon->ses, server, 3071 flags, 3, rqst, 3072 resp_buftype, rsp_iov); 3073 3074 ioctl_rsp = rsp_iov[1].iov_base; 3075 3076 /* 3077 * Open was successful and we got an ioctl response. 3078 */ 3079 if (rc == 0) { 3080 /* See MS-FSCC 2.3.23 */ 3081 3082 reparse_buf = (struct reparse_data_buffer *) 3083 ((char *)ioctl_rsp + 3084 le32_to_cpu(ioctl_rsp->OutputOffset)); 3085 plen = le32_to_cpu(ioctl_rsp->OutputCount); 3086 3087 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) > 3088 rsp_iov[1].iov_len) { 3089 cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n", 3090 plen); 3091 rc = -EIO; 3092 goto query_rp_exit; 3093 } 3094 *tag = le32_to_cpu(reparse_buf->ReparseTag); 3095 *rsp = rsp_iov[1]; 3096 *rsp_buftype = resp_buftype[1]; 3097 resp_buftype[1] = CIFS_NO_BUFFER; 3098 } 3099 3100 query_rp_exit: 3101 SMB2_open_free(&rqst[0]); 3102 SMB2_ioctl_free(&rqst[1]); 3103 SMB2_close_free(&rqst[2]); 3104 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 3105 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 3106 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 3107 kfree(vars); 3108 out_free_path: 3109 kfree(utf16_path); 3110 return rc; 3111 } 3112 3113 static struct cifs_ntsd * 3114 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3115 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3116 { 3117 struct cifs_ntsd *pntsd = NULL; 3118 unsigned int xid; 3119 int rc = -EOPNOTSUPP; 3120 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3121 3122 if (IS_ERR(tlink)) 3123 return ERR_CAST(tlink); 3124 3125 xid = get_xid(); 3126 cifs_dbg(FYI, "trying to get acl\n"); 3127 3128 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3129 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3130 info); 3131 free_xid(xid); 3132 3133 cifs_put_tlink(tlink); 3134 3135 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3136 if (rc) 3137 return ERR_PTR(rc); 3138 return pntsd; 3139 3140 } 3141 3142 static struct cifs_ntsd * 3143 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3144 const char *path, u32 *pacllen, u32 info) 3145 { 3146 struct cifs_ntsd *pntsd = NULL; 3147 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3148 unsigned int xid; 3149 int rc; 3150 struct cifs_tcon *tcon; 3151 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3152 struct cifs_fid fid; 3153 struct cifs_open_parms oparms; 3154 __le16 *utf16_path; 3155 3156 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3157 if (IS_ERR(tlink)) 3158 return ERR_CAST(tlink); 3159 3160 tcon = tlink_tcon(tlink); 3161 xid = get_xid(); 3162 3163 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3164 if (!utf16_path) { 3165 rc = -ENOMEM; 3166 free_xid(xid); 3167 return ERR_PTR(rc); 3168 } 3169 3170 oparms = (struct cifs_open_parms) { 3171 .tcon = tcon, 3172 .path = path, 3173 .desired_access = READ_CONTROL, 3174 .disposition = FILE_OPEN, 3175 /* 3176 * When querying an ACL, even if the file is a symlink 3177 * we want to open the source not the target, and so 3178 * the protocol requires that the client specify this 3179 * flag when opening a reparse point 3180 */ 3181 .create_options = cifs_create_options(cifs_sb, 0) | 3182 OPEN_REPARSE_POINT, 3183 .fid = &fid, 3184 }; 3185 3186 if (info & SACL_SECINFO) 3187 oparms.desired_access |= SYSTEM_SECURITY; 3188 3189 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3190 NULL); 3191 kfree(utf16_path); 3192 if (!rc) { 3193 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3194 fid.volatile_fid, (void **)&pntsd, pacllen, 3195 info); 3196 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3197 } 3198 3199 cifs_put_tlink(tlink); 3200 free_xid(xid); 3201 3202 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3203 if (rc) 3204 return ERR_PTR(rc); 3205 return pntsd; 3206 } 3207 3208 static int 3209 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3210 struct inode *inode, const char *path, int aclflag) 3211 { 3212 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3213 unsigned int xid; 3214 int rc, access_flags = 0; 3215 struct cifs_tcon *tcon; 3216 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3217 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3218 struct cifs_fid fid; 3219 struct cifs_open_parms oparms; 3220 __le16 *utf16_path; 3221 3222 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3223 if (IS_ERR(tlink)) 3224 return PTR_ERR(tlink); 3225 3226 tcon = tlink_tcon(tlink); 3227 xid = get_xid(); 3228 3229 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3230 access_flags |= WRITE_OWNER; 3231 if (aclflag & CIFS_ACL_SACL) 3232 access_flags |= SYSTEM_SECURITY; 3233 if (aclflag & CIFS_ACL_DACL) 3234 access_flags |= WRITE_DAC; 3235 3236 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3237 if (!utf16_path) { 3238 rc = -ENOMEM; 3239 free_xid(xid); 3240 return rc; 3241 } 3242 3243 oparms = (struct cifs_open_parms) { 3244 .tcon = tcon, 3245 .desired_access = access_flags, 3246 .create_options = cifs_create_options(cifs_sb, 0), 3247 .disposition = FILE_OPEN, 3248 .path = path, 3249 .fid = &fid, 3250 }; 3251 3252 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3253 NULL, NULL); 3254 kfree(utf16_path); 3255 if (!rc) { 3256 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3257 fid.volatile_fid, pnntsd, acllen, aclflag); 3258 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3259 } 3260 3261 cifs_put_tlink(tlink); 3262 free_xid(xid); 3263 return rc; 3264 } 3265 3266 /* Retrieve an ACL from the server */ 3267 static struct cifs_ntsd * 3268 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3269 struct inode *inode, const char *path, 3270 u32 *pacllen, u32 info) 3271 { 3272 struct cifs_ntsd *pntsd = NULL; 3273 struct cifsFileInfo *open_file = NULL; 3274 3275 if (inode && !(info & SACL_SECINFO)) 3276 open_file = find_readable_file(CIFS_I(inode), true); 3277 if (!open_file || (info & SACL_SECINFO)) 3278 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3279 3280 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3281 cifsFileInfo_put(open_file); 3282 return pntsd; 3283 } 3284 3285 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3286 loff_t offset, loff_t len, unsigned int xid) 3287 { 3288 struct cifsFileInfo *cfile = file->private_data; 3289 struct file_zero_data_information fsctl_buf; 3290 3291 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3292 3293 fsctl_buf.FileOffset = cpu_to_le64(offset); 3294 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3295 3296 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3297 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3298 (char *)&fsctl_buf, 3299 sizeof(struct file_zero_data_information), 3300 0, NULL, NULL); 3301 } 3302 3303 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3304 loff_t offset, loff_t len, bool keep_size) 3305 { 3306 struct cifs_ses *ses = tcon->ses; 3307 struct inode *inode = file_inode(file); 3308 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3309 struct cifsFileInfo *cfile = file->private_data; 3310 long rc; 3311 unsigned int xid; 3312 __le64 eof; 3313 3314 xid = get_xid(); 3315 3316 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3317 ses->Suid, offset, len); 3318 3319 inode_lock(inode); 3320 filemap_invalidate_lock(inode->i_mapping); 3321 3322 /* 3323 * We zero the range through ioctl, so we need remove the page caches 3324 * first, otherwise the data may be inconsistent with the server. 3325 */ 3326 truncate_pagecache_range(inode, offset, offset + len - 1); 3327 3328 /* if file not oplocked can't be sure whether asking to extend size */ 3329 rc = -EOPNOTSUPP; 3330 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3331 goto zero_range_exit; 3332 3333 rc = smb3_zero_data(file, tcon, offset, len, xid); 3334 if (rc < 0) 3335 goto zero_range_exit; 3336 3337 /* 3338 * do we also need to change the size of the file? 3339 */ 3340 if (keep_size == false && i_size_read(inode) < offset + len) { 3341 eof = cpu_to_le64(offset + len); 3342 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3343 cfile->fid.volatile_fid, cfile->pid, &eof); 3344 } 3345 3346 zero_range_exit: 3347 filemap_invalidate_unlock(inode->i_mapping); 3348 inode_unlock(inode); 3349 free_xid(xid); 3350 if (rc) 3351 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3352 ses->Suid, offset, len, rc); 3353 else 3354 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3355 ses->Suid, offset, len); 3356 return rc; 3357 } 3358 3359 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3360 loff_t offset, loff_t len) 3361 { 3362 struct inode *inode = file_inode(file); 3363 struct cifsFileInfo *cfile = file->private_data; 3364 struct file_zero_data_information fsctl_buf; 3365 long rc; 3366 unsigned int xid; 3367 __u8 set_sparse = 1; 3368 3369 xid = get_xid(); 3370 3371 inode_lock(inode); 3372 /* Need to make file sparse, if not already, before freeing range. */ 3373 /* Consider adding equivalent for compressed since it could also work */ 3374 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3375 rc = -EOPNOTSUPP; 3376 goto out; 3377 } 3378 3379 filemap_invalidate_lock(inode->i_mapping); 3380 /* 3381 * We implement the punch hole through ioctl, so we need remove the page 3382 * caches first, otherwise the data may be inconsistent with the server. 3383 */ 3384 truncate_pagecache_range(inode, offset, offset + len - 1); 3385 3386 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3387 3388 fsctl_buf.FileOffset = cpu_to_le64(offset); 3389 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3390 3391 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3392 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3393 (char *)&fsctl_buf, 3394 sizeof(struct file_zero_data_information), 3395 CIFSMaxBufSize, NULL, NULL); 3396 filemap_invalidate_unlock(inode->i_mapping); 3397 out: 3398 inode_unlock(inode); 3399 free_xid(xid); 3400 return rc; 3401 } 3402 3403 static int smb3_simple_fallocate_write_range(unsigned int xid, 3404 struct cifs_tcon *tcon, 3405 struct cifsFileInfo *cfile, 3406 loff_t off, loff_t len, 3407 char *buf) 3408 { 3409 struct cifs_io_parms io_parms = {0}; 3410 int nbytes; 3411 int rc = 0; 3412 struct kvec iov[2]; 3413 3414 io_parms.netfid = cfile->fid.netfid; 3415 io_parms.pid = current->tgid; 3416 io_parms.tcon = tcon; 3417 io_parms.persistent_fid = cfile->fid.persistent_fid; 3418 io_parms.volatile_fid = cfile->fid.volatile_fid; 3419 3420 while (len) { 3421 io_parms.offset = off; 3422 io_parms.length = len; 3423 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3424 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3425 /* iov[0] is reserved for smb header */ 3426 iov[1].iov_base = buf; 3427 iov[1].iov_len = io_parms.length; 3428 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3429 if (rc) 3430 break; 3431 if (nbytes > len) 3432 return -EINVAL; 3433 buf += nbytes; 3434 off += nbytes; 3435 len -= nbytes; 3436 } 3437 return rc; 3438 } 3439 3440 static int smb3_simple_fallocate_range(unsigned int xid, 3441 struct cifs_tcon *tcon, 3442 struct cifsFileInfo *cfile, 3443 loff_t off, loff_t len) 3444 { 3445 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3446 u32 out_data_len; 3447 char *buf = NULL; 3448 loff_t l; 3449 int rc; 3450 3451 in_data.file_offset = cpu_to_le64(off); 3452 in_data.length = cpu_to_le64(len); 3453 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3454 cfile->fid.volatile_fid, 3455 FSCTL_QUERY_ALLOCATED_RANGES, 3456 (char *)&in_data, sizeof(in_data), 3457 1024 * sizeof(struct file_allocated_range_buffer), 3458 (char **)&out_data, &out_data_len); 3459 if (rc) 3460 goto out; 3461 3462 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3463 if (buf == NULL) { 3464 rc = -ENOMEM; 3465 goto out; 3466 } 3467 3468 tmp_data = out_data; 3469 while (len) { 3470 /* 3471 * The rest of the region is unmapped so write it all. 3472 */ 3473 if (out_data_len == 0) { 3474 rc = smb3_simple_fallocate_write_range(xid, tcon, 3475 cfile, off, len, buf); 3476 goto out; 3477 } 3478 3479 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3480 rc = -EINVAL; 3481 goto out; 3482 } 3483 3484 if (off < le64_to_cpu(tmp_data->file_offset)) { 3485 /* 3486 * We are at a hole. Write until the end of the region 3487 * or until the next allocated data, 3488 * whichever comes next. 3489 */ 3490 l = le64_to_cpu(tmp_data->file_offset) - off; 3491 if (len < l) 3492 l = len; 3493 rc = smb3_simple_fallocate_write_range(xid, tcon, 3494 cfile, off, l, buf); 3495 if (rc) 3496 goto out; 3497 off = off + l; 3498 len = len - l; 3499 if (len == 0) 3500 goto out; 3501 } 3502 /* 3503 * We are at a section of allocated data, just skip forward 3504 * until the end of the data or the end of the region 3505 * we are supposed to fallocate, whichever comes first. 3506 */ 3507 l = le64_to_cpu(tmp_data->length); 3508 if (len < l) 3509 l = len; 3510 off += l; 3511 len -= l; 3512 3513 tmp_data = &tmp_data[1]; 3514 out_data_len -= sizeof(struct file_allocated_range_buffer); 3515 } 3516 3517 out: 3518 kfree(out_data); 3519 kfree(buf); 3520 return rc; 3521 } 3522 3523 3524 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3525 loff_t off, loff_t len, bool keep_size) 3526 { 3527 struct inode *inode; 3528 struct cifsInodeInfo *cifsi; 3529 struct cifsFileInfo *cfile = file->private_data; 3530 long rc = -EOPNOTSUPP; 3531 unsigned int xid; 3532 __le64 eof; 3533 3534 xid = get_xid(); 3535 3536 inode = d_inode(cfile->dentry); 3537 cifsi = CIFS_I(inode); 3538 3539 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3540 tcon->ses->Suid, off, len); 3541 /* if file not oplocked can't be sure whether asking to extend size */ 3542 if (!CIFS_CACHE_READ(cifsi)) 3543 if (keep_size == false) { 3544 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3545 tcon->tid, tcon->ses->Suid, off, len, rc); 3546 free_xid(xid); 3547 return rc; 3548 } 3549 3550 /* 3551 * Extending the file 3552 */ 3553 if ((keep_size == false) && i_size_read(inode) < off + len) { 3554 rc = inode_newsize_ok(inode, off + len); 3555 if (rc) 3556 goto out; 3557 3558 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3559 smb2_set_sparse(xid, tcon, cfile, inode, false); 3560 3561 eof = cpu_to_le64(off + len); 3562 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3563 cfile->fid.volatile_fid, cfile->pid, &eof); 3564 if (rc == 0) { 3565 cifsi->server_eof = off + len; 3566 cifs_setsize(inode, off + len); 3567 cifs_truncate_page(inode->i_mapping, inode->i_size); 3568 truncate_setsize(inode, off + len); 3569 } 3570 goto out; 3571 } 3572 3573 /* 3574 * Files are non-sparse by default so falloc may be a no-op 3575 * Must check if file sparse. If not sparse, and since we are not 3576 * extending then no need to do anything since file already allocated 3577 */ 3578 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3579 rc = 0; 3580 goto out; 3581 } 3582 3583 if (keep_size == true) { 3584 /* 3585 * We can not preallocate pages beyond the end of the file 3586 * in SMB2 3587 */ 3588 if (off >= i_size_read(inode)) { 3589 rc = 0; 3590 goto out; 3591 } 3592 /* 3593 * For fallocates that are partially beyond the end of file, 3594 * clamp len so we only fallocate up to the end of file. 3595 */ 3596 if (off + len > i_size_read(inode)) { 3597 len = i_size_read(inode) - off; 3598 } 3599 } 3600 3601 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3602 /* 3603 * At this point, we are trying to fallocate an internal 3604 * regions of a sparse file. Since smb2 does not have a 3605 * fallocate command we have two otions on how to emulate this. 3606 * We can either turn the entire file to become non-sparse 3607 * which we only do if the fallocate is for virtually 3608 * the whole file, or we can overwrite the region with zeroes 3609 * using SMB2_write, which could be prohibitevly expensive 3610 * if len is large. 3611 */ 3612 /* 3613 * We are only trying to fallocate a small region so 3614 * just write it with zero. 3615 */ 3616 if (len <= 1024 * 1024) { 3617 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3618 off, len); 3619 goto out; 3620 } 3621 3622 /* 3623 * Check if falloc starts within first few pages of file 3624 * and ends within a few pages of the end of file to 3625 * ensure that most of file is being forced to be 3626 * fallocated now. If so then setting whole file sparse 3627 * ie potentially making a few extra pages at the beginning 3628 * or end of the file non-sparse via set_sparse is harmless. 3629 */ 3630 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3631 rc = -EOPNOTSUPP; 3632 goto out; 3633 } 3634 } 3635 3636 smb2_set_sparse(xid, tcon, cfile, inode, false); 3637 rc = 0; 3638 3639 out: 3640 if (rc) 3641 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3642 tcon->ses->Suid, off, len, rc); 3643 else 3644 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3645 tcon->ses->Suid, off, len); 3646 3647 free_xid(xid); 3648 return rc; 3649 } 3650 3651 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3652 loff_t off, loff_t len) 3653 { 3654 int rc; 3655 unsigned int xid; 3656 struct inode *inode = file_inode(file); 3657 struct cifsFileInfo *cfile = file->private_data; 3658 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3659 __le64 eof; 3660 loff_t old_eof; 3661 3662 xid = get_xid(); 3663 3664 inode_lock(inode); 3665 3666 old_eof = i_size_read(inode); 3667 if ((off >= old_eof) || 3668 off + len >= old_eof) { 3669 rc = -EINVAL; 3670 goto out; 3671 } 3672 3673 filemap_invalidate_lock(inode->i_mapping); 3674 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3675 if (rc < 0) 3676 goto out_2; 3677 3678 truncate_pagecache_range(inode, off, old_eof); 3679 3680 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3681 old_eof - off - len, off); 3682 if (rc < 0) 3683 goto out_2; 3684 3685 eof = cpu_to_le64(old_eof - len); 3686 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3687 cfile->fid.volatile_fid, cfile->pid, &eof); 3688 if (rc < 0) 3689 goto out_2; 3690 3691 rc = 0; 3692 3693 cifsi->server_eof = i_size_read(inode) - len; 3694 truncate_setsize(inode, cifsi->server_eof); 3695 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3696 out_2: 3697 filemap_invalidate_unlock(inode->i_mapping); 3698 out: 3699 inode_unlock(inode); 3700 free_xid(xid); 3701 return rc; 3702 } 3703 3704 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3705 loff_t off, loff_t len) 3706 { 3707 int rc; 3708 unsigned int xid; 3709 struct cifsFileInfo *cfile = file->private_data; 3710 struct inode *inode = file_inode(file); 3711 __le64 eof; 3712 __u64 count, old_eof; 3713 3714 xid = get_xid(); 3715 3716 inode_lock(inode); 3717 3718 old_eof = i_size_read(inode); 3719 if (off >= old_eof) { 3720 rc = -EINVAL; 3721 goto out; 3722 } 3723 3724 count = old_eof - off; 3725 eof = cpu_to_le64(old_eof + len); 3726 3727 filemap_invalidate_lock(inode->i_mapping); 3728 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1); 3729 if (rc < 0) 3730 goto out_2; 3731 truncate_pagecache_range(inode, off, old_eof); 3732 3733 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3734 cfile->fid.volatile_fid, cfile->pid, &eof); 3735 if (rc < 0) 3736 goto out_2; 3737 3738 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3739 if (rc < 0) 3740 goto out_2; 3741 3742 rc = smb3_zero_data(file, tcon, off, len, xid); 3743 if (rc < 0) 3744 goto out_2; 3745 3746 rc = 0; 3747 out_2: 3748 filemap_invalidate_unlock(inode->i_mapping); 3749 out: 3750 inode_unlock(inode); 3751 free_xid(xid); 3752 return rc; 3753 } 3754 3755 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3756 { 3757 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3758 struct cifsInodeInfo *cifsi; 3759 struct inode *inode; 3760 int rc = 0; 3761 struct file_allocated_range_buffer in_data, *out_data = NULL; 3762 u32 out_data_len; 3763 unsigned int xid; 3764 3765 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3766 return generic_file_llseek(file, offset, whence); 3767 3768 inode = d_inode(cfile->dentry); 3769 cifsi = CIFS_I(inode); 3770 3771 if (offset < 0 || offset >= i_size_read(inode)) 3772 return -ENXIO; 3773 3774 xid = get_xid(); 3775 /* 3776 * We need to be sure that all dirty pages are written as they 3777 * might fill holes on the server. 3778 * Note that we also MUST flush any written pages since at least 3779 * some servers (Windows2016) will not reflect recent writes in 3780 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3781 */ 3782 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3783 if (wrcfile) { 3784 filemap_write_and_wait(inode->i_mapping); 3785 smb2_flush_file(xid, tcon, &wrcfile->fid); 3786 cifsFileInfo_put(wrcfile); 3787 } 3788 3789 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3790 if (whence == SEEK_HOLE) 3791 offset = i_size_read(inode); 3792 goto lseek_exit; 3793 } 3794 3795 in_data.file_offset = cpu_to_le64(offset); 3796 in_data.length = cpu_to_le64(i_size_read(inode)); 3797 3798 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3799 cfile->fid.volatile_fid, 3800 FSCTL_QUERY_ALLOCATED_RANGES, 3801 (char *)&in_data, sizeof(in_data), 3802 sizeof(struct file_allocated_range_buffer), 3803 (char **)&out_data, &out_data_len); 3804 if (rc == -E2BIG) 3805 rc = 0; 3806 if (rc) 3807 goto lseek_exit; 3808 3809 if (whence == SEEK_HOLE && out_data_len == 0) 3810 goto lseek_exit; 3811 3812 if (whence == SEEK_DATA && out_data_len == 0) { 3813 rc = -ENXIO; 3814 goto lseek_exit; 3815 } 3816 3817 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3818 rc = -EINVAL; 3819 goto lseek_exit; 3820 } 3821 if (whence == SEEK_DATA) { 3822 offset = le64_to_cpu(out_data->file_offset); 3823 goto lseek_exit; 3824 } 3825 if (offset < le64_to_cpu(out_data->file_offset)) 3826 goto lseek_exit; 3827 3828 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3829 3830 lseek_exit: 3831 free_xid(xid); 3832 kfree(out_data); 3833 if (!rc) 3834 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3835 else 3836 return rc; 3837 } 3838 3839 static int smb3_fiemap(struct cifs_tcon *tcon, 3840 struct cifsFileInfo *cfile, 3841 struct fiemap_extent_info *fei, u64 start, u64 len) 3842 { 3843 unsigned int xid; 3844 struct file_allocated_range_buffer in_data, *out_data; 3845 u32 out_data_len; 3846 int i, num, rc, flags, last_blob; 3847 u64 next; 3848 3849 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3850 if (rc) 3851 return rc; 3852 3853 xid = get_xid(); 3854 again: 3855 in_data.file_offset = cpu_to_le64(start); 3856 in_data.length = cpu_to_le64(len); 3857 3858 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3859 cfile->fid.volatile_fid, 3860 FSCTL_QUERY_ALLOCATED_RANGES, 3861 (char *)&in_data, sizeof(in_data), 3862 1024 * sizeof(struct file_allocated_range_buffer), 3863 (char **)&out_data, &out_data_len); 3864 if (rc == -E2BIG) { 3865 last_blob = 0; 3866 rc = 0; 3867 } else 3868 last_blob = 1; 3869 if (rc) 3870 goto out; 3871 3872 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3873 rc = -EINVAL; 3874 goto out; 3875 } 3876 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3877 rc = -EINVAL; 3878 goto out; 3879 } 3880 3881 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3882 for (i = 0; i < num; i++) { 3883 flags = 0; 3884 if (i == num - 1 && last_blob) 3885 flags |= FIEMAP_EXTENT_LAST; 3886 3887 rc = fiemap_fill_next_extent(fei, 3888 le64_to_cpu(out_data[i].file_offset), 3889 le64_to_cpu(out_data[i].file_offset), 3890 le64_to_cpu(out_data[i].length), 3891 flags); 3892 if (rc < 0) 3893 goto out; 3894 if (rc == 1) { 3895 rc = 0; 3896 goto out; 3897 } 3898 } 3899 3900 if (!last_blob) { 3901 next = le64_to_cpu(out_data[num - 1].file_offset) + 3902 le64_to_cpu(out_data[num - 1].length); 3903 len = len - (next - start); 3904 start = next; 3905 goto again; 3906 } 3907 3908 out: 3909 free_xid(xid); 3910 kfree(out_data); 3911 return rc; 3912 } 3913 3914 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3915 loff_t off, loff_t len) 3916 { 3917 /* KEEP_SIZE already checked for by do_fallocate */ 3918 if (mode & FALLOC_FL_PUNCH_HOLE) 3919 return smb3_punch_hole(file, tcon, off, len); 3920 else if (mode & FALLOC_FL_ZERO_RANGE) { 3921 if (mode & FALLOC_FL_KEEP_SIZE) 3922 return smb3_zero_range(file, tcon, off, len, true); 3923 return smb3_zero_range(file, tcon, off, len, false); 3924 } else if (mode == FALLOC_FL_KEEP_SIZE) 3925 return smb3_simple_falloc(file, tcon, off, len, true); 3926 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3927 return smb3_collapse_range(file, tcon, off, len); 3928 else if (mode == FALLOC_FL_INSERT_RANGE) 3929 return smb3_insert_range(file, tcon, off, len); 3930 else if (mode == 0) 3931 return smb3_simple_falloc(file, tcon, off, len, false); 3932 3933 return -EOPNOTSUPP; 3934 } 3935 3936 static void 3937 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3938 struct cifsInodeInfo *cinode, __u32 oplock, 3939 unsigned int epoch, bool *purge_cache) 3940 { 3941 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3942 } 3943 3944 static void 3945 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3946 unsigned int epoch, bool *purge_cache); 3947 3948 static void 3949 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3950 struct cifsInodeInfo *cinode, __u32 oplock, 3951 unsigned int epoch, bool *purge_cache) 3952 { 3953 unsigned int old_state = cinode->oplock; 3954 unsigned int old_epoch = cinode->epoch; 3955 unsigned int new_state; 3956 3957 if (epoch > old_epoch) { 3958 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3959 cinode->epoch = epoch; 3960 } 3961 3962 new_state = cinode->oplock; 3963 *purge_cache = false; 3964 3965 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3966 (new_state & CIFS_CACHE_READ_FLG) == 0) 3967 *purge_cache = true; 3968 else if (old_state == new_state && (epoch - old_epoch > 1)) 3969 *purge_cache = true; 3970 } 3971 3972 static void 3973 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3974 unsigned int epoch, bool *purge_cache) 3975 { 3976 oplock &= 0xFF; 3977 cinode->lease_granted = false; 3978 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 3979 return; 3980 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 3981 cinode->oplock = CIFS_CACHE_RHW_FLG; 3982 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 3983 &cinode->netfs.inode); 3984 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 3985 cinode->oplock = CIFS_CACHE_RW_FLG; 3986 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 3987 &cinode->netfs.inode); 3988 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 3989 cinode->oplock = CIFS_CACHE_READ_FLG; 3990 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 3991 &cinode->netfs.inode); 3992 } else 3993 cinode->oplock = 0; 3994 } 3995 3996 static void 3997 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3998 unsigned int epoch, bool *purge_cache) 3999 { 4000 char message[5] = {0}; 4001 unsigned int new_oplock = 0; 4002 4003 oplock &= 0xFF; 4004 cinode->lease_granted = true; 4005 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4006 return; 4007 4008 /* Check if the server granted an oplock rather than a lease */ 4009 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4010 return smb2_set_oplock_level(cinode, oplock, epoch, 4011 purge_cache); 4012 4013 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4014 new_oplock |= CIFS_CACHE_READ_FLG; 4015 strcat(message, "R"); 4016 } 4017 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4018 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4019 strcat(message, "H"); 4020 } 4021 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4022 new_oplock |= CIFS_CACHE_WRITE_FLG; 4023 strcat(message, "W"); 4024 } 4025 if (!new_oplock) 4026 strncpy(message, "None", sizeof(message)); 4027 4028 cinode->oplock = new_oplock; 4029 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4030 &cinode->netfs.inode); 4031 } 4032 4033 static void 4034 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4035 unsigned int epoch, bool *purge_cache) 4036 { 4037 unsigned int old_oplock = cinode->oplock; 4038 4039 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4040 4041 if (purge_cache) { 4042 *purge_cache = false; 4043 if (old_oplock == CIFS_CACHE_READ_FLG) { 4044 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4045 (epoch - cinode->epoch > 0)) 4046 *purge_cache = true; 4047 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4048 (epoch - cinode->epoch > 1)) 4049 *purge_cache = true; 4050 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4051 (epoch - cinode->epoch > 1)) 4052 *purge_cache = true; 4053 else if (cinode->oplock == 0 && 4054 (epoch - cinode->epoch > 0)) 4055 *purge_cache = true; 4056 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4057 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4058 (epoch - cinode->epoch > 0)) 4059 *purge_cache = true; 4060 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4061 (epoch - cinode->epoch > 1)) 4062 *purge_cache = true; 4063 } 4064 cinode->epoch = epoch; 4065 } 4066 } 4067 4068 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4069 static bool 4070 smb2_is_read_op(__u32 oplock) 4071 { 4072 return oplock == SMB2_OPLOCK_LEVEL_II; 4073 } 4074 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4075 4076 static bool 4077 smb21_is_read_op(__u32 oplock) 4078 { 4079 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4080 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4081 } 4082 4083 static __le32 4084 map_oplock_to_lease(u8 oplock) 4085 { 4086 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4087 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4088 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4089 return SMB2_LEASE_READ_CACHING_LE; 4090 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4091 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4092 SMB2_LEASE_WRITE_CACHING_LE; 4093 return 0; 4094 } 4095 4096 static char * 4097 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 4098 { 4099 struct create_lease *buf; 4100 4101 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4102 if (!buf) 4103 return NULL; 4104 4105 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4106 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4107 4108 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4109 (struct create_lease, lcontext)); 4110 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4111 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4112 (struct create_lease, Name)); 4113 buf->ccontext.NameLength = cpu_to_le16(4); 4114 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4115 buf->Name[0] = 'R'; 4116 buf->Name[1] = 'q'; 4117 buf->Name[2] = 'L'; 4118 buf->Name[3] = 's'; 4119 return (char *)buf; 4120 } 4121 4122 static char * 4123 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4124 { 4125 struct create_lease_v2 *buf; 4126 4127 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4128 if (!buf) 4129 return NULL; 4130 4131 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4132 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4133 4134 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4135 (struct create_lease_v2, lcontext)); 4136 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4137 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4138 (struct create_lease_v2, Name)); 4139 buf->ccontext.NameLength = cpu_to_le16(4); 4140 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4141 buf->Name[0] = 'R'; 4142 buf->Name[1] = 'q'; 4143 buf->Name[2] = 'L'; 4144 buf->Name[3] = 's'; 4145 return (char *)buf; 4146 } 4147 4148 static __u8 4149 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4150 { 4151 struct create_lease *lc = (struct create_lease *)buf; 4152 4153 *epoch = 0; /* not used */ 4154 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4155 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4156 return le32_to_cpu(lc->lcontext.LeaseState); 4157 } 4158 4159 static __u8 4160 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4161 { 4162 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4163 4164 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4165 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4166 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4167 if (lease_key) 4168 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4169 return le32_to_cpu(lc->lcontext.LeaseState); 4170 } 4171 4172 static unsigned int 4173 smb2_wp_retry_size(struct inode *inode) 4174 { 4175 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4176 SMB2_MAX_BUFFER_SIZE); 4177 } 4178 4179 static bool 4180 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4181 { 4182 return !cfile->invalidHandle; 4183 } 4184 4185 static void 4186 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4187 struct smb_rqst *old_rq, __le16 cipher_type) 4188 { 4189 struct smb2_hdr *shdr = 4190 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4191 4192 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4193 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4194 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4195 tr_hdr->Flags = cpu_to_le16(0x01); 4196 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4197 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4198 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4199 else 4200 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4201 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4202 } 4203 4204 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4205 int num_rqst, const u8 *sig, u8 **iv, 4206 struct aead_request **req, struct sg_table *sgt, 4207 unsigned int *num_sgs, size_t *sensitive_size) 4208 { 4209 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4210 unsigned int iv_size = crypto_aead_ivsize(tfm); 4211 unsigned int len; 4212 u8 *p; 4213 4214 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4215 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4216 return ERR_PTR(*num_sgs); 4217 4218 len = iv_size; 4219 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4220 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4221 len += req_size; 4222 len = ALIGN(len, __alignof__(struct scatterlist)); 4223 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4224 *sensitive_size = len; 4225 4226 p = kvzalloc(len, GFP_NOFS); 4227 if (!p) 4228 return ERR_PTR(-ENOMEM); 4229 4230 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4231 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4232 crypto_tfm_ctx_alignment()); 4233 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4234 __alignof__(struct scatterlist)); 4235 return p; 4236 } 4237 4238 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4239 int num_rqst, const u8 *sig, u8 **iv, 4240 struct aead_request **req, struct scatterlist **sgl, 4241 size_t *sensitive_size) 4242 { 4243 struct sg_table sgtable = {}; 4244 unsigned int skip, num_sgs, i, j; 4245 ssize_t rc; 4246 void *p; 4247 4248 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4249 &num_sgs, sensitive_size); 4250 if (IS_ERR(p)) 4251 return ERR_CAST(p); 4252 4253 sg_init_marker(sgtable.sgl, num_sgs); 4254 4255 /* 4256 * The first rqst has a transform header where the 4257 * first 20 bytes are not part of the encrypted blob. 4258 */ 4259 skip = 20; 4260 4261 for (i = 0; i < num_rqst; i++) { 4262 struct iov_iter *iter = &rqst[i].rq_iter; 4263 size_t count = iov_iter_count(iter); 4264 4265 for (j = 0; j < rqst[i].rq_nvec; j++) { 4266 cifs_sg_set_buf(&sgtable, 4267 rqst[i].rq_iov[j].iov_base + skip, 4268 rqst[i].rq_iov[j].iov_len - skip); 4269 4270 /* See the above comment on the 'skip' assignment */ 4271 skip = 0; 4272 } 4273 sgtable.orig_nents = sgtable.nents; 4274 4275 rc = extract_iter_to_sg(iter, count, &sgtable, 4276 num_sgs - sgtable.nents, 0); 4277 iov_iter_revert(iter, rc); 4278 sgtable.orig_nents = sgtable.nents; 4279 } 4280 4281 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4282 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4283 *sgl = sgtable.sgl; 4284 return p; 4285 } 4286 4287 static int 4288 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4289 { 4290 struct TCP_Server_Info *pserver; 4291 struct cifs_ses *ses; 4292 u8 *ses_enc_key; 4293 4294 /* If server is a channel, select the primary channel */ 4295 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4296 4297 spin_lock(&cifs_tcp_ses_lock); 4298 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4299 if (ses->Suid == ses_id) { 4300 spin_lock(&ses->ses_lock); 4301 ses_enc_key = enc ? ses->smb3encryptionkey : 4302 ses->smb3decryptionkey; 4303 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4304 spin_unlock(&ses->ses_lock); 4305 spin_unlock(&cifs_tcp_ses_lock); 4306 return 0; 4307 } 4308 } 4309 spin_unlock(&cifs_tcp_ses_lock); 4310 4311 trace_smb3_ses_not_found(ses_id); 4312 4313 return -EAGAIN; 4314 } 4315 /* 4316 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4317 * iov[0] - transform header (associate data), 4318 * iov[1-N] - SMB2 header and pages - data to encrypt. 4319 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4320 * untouched. 4321 */ 4322 static int 4323 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4324 struct smb_rqst *rqst, int enc) 4325 { 4326 struct smb2_transform_hdr *tr_hdr = 4327 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4328 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4329 int rc = 0; 4330 struct scatterlist *sg; 4331 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4332 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4333 struct aead_request *req; 4334 u8 *iv; 4335 DECLARE_CRYPTO_WAIT(wait); 4336 struct crypto_aead *tfm; 4337 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4338 void *creq; 4339 size_t sensitive_size; 4340 4341 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4342 if (rc) { 4343 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4344 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4345 return rc; 4346 } 4347 4348 rc = smb3_crypto_aead_allocate(server); 4349 if (rc) { 4350 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4351 return rc; 4352 } 4353 4354 tfm = enc ? server->secmech.enc : server->secmech.dec; 4355 4356 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4357 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4358 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4359 else 4360 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4361 4362 if (rc) { 4363 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4364 return rc; 4365 } 4366 4367 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4368 if (rc) { 4369 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4370 return rc; 4371 } 4372 4373 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4374 &sensitive_size); 4375 if (IS_ERR(creq)) 4376 return PTR_ERR(creq); 4377 4378 if (!enc) { 4379 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4380 crypt_len += SMB2_SIGNATURE_SIZE; 4381 } 4382 4383 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4384 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4385 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4386 else { 4387 iv[0] = 3; 4388 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4389 } 4390 4391 aead_request_set_tfm(req, tfm); 4392 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4393 aead_request_set_ad(req, assoc_data_len); 4394 4395 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4396 crypto_req_done, &wait); 4397 4398 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4399 : crypto_aead_decrypt(req), &wait); 4400 4401 if (!rc && enc) 4402 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4403 4404 kvfree_sensitive(creq, sensitive_size); 4405 return rc; 4406 } 4407 4408 /* 4409 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4410 */ 4411 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4412 { 4413 struct folio *folio; 4414 4415 XA_STATE(xas, buffer, 0); 4416 4417 rcu_read_lock(); 4418 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4419 folio_put(folio); 4420 } 4421 rcu_read_unlock(); 4422 xa_destroy(buffer); 4423 } 4424 4425 void 4426 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4427 { 4428 int i; 4429 4430 for (i = 0; i < num_rqst; i++) 4431 if (!xa_empty(&rqst[i].rq_buffer)) 4432 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4433 } 4434 4435 /* 4436 * This function will initialize new_rq and encrypt the content. 4437 * The first entry, new_rq[0], only contains a single iov which contains 4438 * a smb2_transform_hdr and is pre-allocated by the caller. 4439 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4440 * 4441 * The end result is an array of smb_rqst structures where the first structure 4442 * only contains a single iov for the transform header which we then can pass 4443 * to crypt_message(). 4444 * 4445 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4446 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4447 */ 4448 static int 4449 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4450 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4451 { 4452 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4453 struct page *page; 4454 unsigned int orig_len = 0; 4455 int i, j; 4456 int rc = -ENOMEM; 4457 4458 for (i = 1; i < num_rqst; i++) { 4459 struct smb_rqst *old = &old_rq[i - 1]; 4460 struct smb_rqst *new = &new_rq[i]; 4461 struct xarray *buffer = &new->rq_buffer; 4462 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4463 4464 orig_len += smb_rqst_len(server, old); 4465 new->rq_iov = old->rq_iov; 4466 new->rq_nvec = old->rq_nvec; 4467 4468 xa_init(buffer); 4469 4470 if (size > 0) { 4471 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4472 4473 for (j = 0; j < npages; j++) { 4474 void *o; 4475 4476 rc = -ENOMEM; 4477 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4478 if (!page) 4479 goto err_free; 4480 page->index = j; 4481 o = xa_store(buffer, j, page, GFP_KERNEL); 4482 if (xa_is_err(o)) { 4483 rc = xa_err(o); 4484 put_page(page); 4485 goto err_free; 4486 } 4487 4488 xa_set_mark(buffer, j, XA_MARK_0); 4489 4490 seg = min_t(size_t, size - copied, PAGE_SIZE); 4491 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4492 rc = -EFAULT; 4493 goto err_free; 4494 } 4495 copied += seg; 4496 } 4497 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4498 buffer, 0, size); 4499 new->rq_iter_size = size; 4500 } 4501 } 4502 4503 /* fill the 1st iov with a transform header */ 4504 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4505 4506 rc = crypt_message(server, num_rqst, new_rq, 1); 4507 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4508 if (rc) 4509 goto err_free; 4510 4511 return rc; 4512 4513 err_free: 4514 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4515 return rc; 4516 } 4517 4518 static int 4519 smb3_is_transform_hdr(void *buf) 4520 { 4521 struct smb2_transform_hdr *trhdr = buf; 4522 4523 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4524 } 4525 4526 static int 4527 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4528 unsigned int buf_data_size, struct iov_iter *iter, 4529 bool is_offloaded) 4530 { 4531 struct kvec iov[2]; 4532 struct smb_rqst rqst = {NULL}; 4533 size_t iter_size = 0; 4534 int rc; 4535 4536 iov[0].iov_base = buf; 4537 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4538 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4539 iov[1].iov_len = buf_data_size; 4540 4541 rqst.rq_iov = iov; 4542 rqst.rq_nvec = 2; 4543 if (iter) { 4544 rqst.rq_iter = *iter; 4545 rqst.rq_iter_size = iov_iter_count(iter); 4546 iter_size = iov_iter_count(iter); 4547 } 4548 4549 rc = crypt_message(server, 1, &rqst, 0); 4550 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4551 4552 if (rc) 4553 return rc; 4554 4555 memmove(buf, iov[1].iov_base, buf_data_size); 4556 4557 if (!is_offloaded) 4558 server->total_read = buf_data_size + iter_size; 4559 4560 return rc; 4561 } 4562 4563 static int 4564 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4565 unsigned int skip, struct iov_iter *iter) 4566 { 4567 struct page *page; 4568 unsigned long index; 4569 4570 xa_for_each(pages, index, page) { 4571 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4572 4573 n = copy_page_to_iter(page, skip, len, iter); 4574 if (n != len) { 4575 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4576 return -EIO; 4577 } 4578 data_size -= n; 4579 skip = 0; 4580 } 4581 4582 return 0; 4583 } 4584 4585 static int 4586 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4587 char *buf, unsigned int buf_len, struct xarray *pages, 4588 unsigned int pages_len, bool is_offloaded) 4589 { 4590 unsigned int data_offset; 4591 unsigned int data_len; 4592 unsigned int cur_off; 4593 unsigned int cur_page_idx; 4594 unsigned int pad_len; 4595 struct cifs_readdata *rdata = mid->callback_data; 4596 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4597 int length; 4598 bool use_rdma_mr = false; 4599 4600 if (shdr->Command != SMB2_READ) { 4601 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4602 return -EOPNOTSUPP; 4603 } 4604 4605 if (server->ops->is_session_expired && 4606 server->ops->is_session_expired(buf)) { 4607 if (!is_offloaded) 4608 cifs_reconnect(server, true); 4609 return -1; 4610 } 4611 4612 if (server->ops->is_status_pending && 4613 server->ops->is_status_pending(buf, server)) 4614 return -1; 4615 4616 /* set up first two iov to get credits */ 4617 rdata->iov[0].iov_base = buf; 4618 rdata->iov[0].iov_len = 0; 4619 rdata->iov[1].iov_base = buf; 4620 rdata->iov[1].iov_len = 4621 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4622 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4623 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4624 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4625 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4626 4627 rdata->result = server->ops->map_error(buf, true); 4628 if (rdata->result != 0) { 4629 cifs_dbg(FYI, "%s: server returned error %d\n", 4630 __func__, rdata->result); 4631 /* normal error on read response */ 4632 if (is_offloaded) 4633 mid->mid_state = MID_RESPONSE_RECEIVED; 4634 else 4635 dequeue_mid(mid, false); 4636 return 0; 4637 } 4638 4639 data_offset = server->ops->read_data_offset(buf); 4640 #ifdef CONFIG_CIFS_SMB_DIRECT 4641 use_rdma_mr = rdata->mr; 4642 #endif 4643 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4644 4645 if (data_offset < server->vals->read_rsp_size) { 4646 /* 4647 * win2k8 sometimes sends an offset of 0 when the read 4648 * is beyond the EOF. Treat it as if the data starts just after 4649 * the header. 4650 */ 4651 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4652 __func__, data_offset); 4653 data_offset = server->vals->read_rsp_size; 4654 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4655 /* data_offset is beyond the end of smallbuf */ 4656 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4657 __func__, data_offset); 4658 rdata->result = -EIO; 4659 if (is_offloaded) 4660 mid->mid_state = MID_RESPONSE_MALFORMED; 4661 else 4662 dequeue_mid(mid, rdata->result); 4663 return 0; 4664 } 4665 4666 pad_len = data_offset - server->vals->read_rsp_size; 4667 4668 if (buf_len <= data_offset) { 4669 /* read response payload is in pages */ 4670 cur_page_idx = pad_len / PAGE_SIZE; 4671 cur_off = pad_len % PAGE_SIZE; 4672 4673 if (cur_page_idx != 0) { 4674 /* data offset is beyond the 1st page of response */ 4675 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4676 __func__, data_offset); 4677 rdata->result = -EIO; 4678 if (is_offloaded) 4679 mid->mid_state = MID_RESPONSE_MALFORMED; 4680 else 4681 dequeue_mid(mid, rdata->result); 4682 return 0; 4683 } 4684 4685 if (data_len > pages_len - pad_len) { 4686 /* data_len is corrupt -- discard frame */ 4687 rdata->result = -EIO; 4688 if (is_offloaded) 4689 mid->mid_state = MID_RESPONSE_MALFORMED; 4690 else 4691 dequeue_mid(mid, rdata->result); 4692 return 0; 4693 } 4694 4695 /* Copy the data to the output I/O iterator. */ 4696 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4697 cur_off, &rdata->iter); 4698 if (rdata->result != 0) { 4699 if (is_offloaded) 4700 mid->mid_state = MID_RESPONSE_MALFORMED; 4701 else 4702 dequeue_mid(mid, rdata->result); 4703 return 0; 4704 } 4705 rdata->got_bytes = pages_len; 4706 4707 } else if (buf_len >= data_offset + data_len) { 4708 /* read response payload is in buf */ 4709 WARN_ONCE(pages && !xa_empty(pages), 4710 "read data can be either in buf or in pages"); 4711 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4712 if (length < 0) 4713 return length; 4714 rdata->got_bytes = data_len; 4715 } else { 4716 /* read response payload cannot be in both buf and pages */ 4717 WARN_ONCE(1, "buf can not contain only a part of read data"); 4718 rdata->result = -EIO; 4719 if (is_offloaded) 4720 mid->mid_state = MID_RESPONSE_MALFORMED; 4721 else 4722 dequeue_mid(mid, rdata->result); 4723 return 0; 4724 } 4725 4726 if (is_offloaded) 4727 mid->mid_state = MID_RESPONSE_RECEIVED; 4728 else 4729 dequeue_mid(mid, false); 4730 return 0; 4731 } 4732 4733 struct smb2_decrypt_work { 4734 struct work_struct decrypt; 4735 struct TCP_Server_Info *server; 4736 struct xarray buffer; 4737 char *buf; 4738 unsigned int len; 4739 }; 4740 4741 4742 static void smb2_decrypt_offload(struct work_struct *work) 4743 { 4744 struct smb2_decrypt_work *dw = container_of(work, 4745 struct smb2_decrypt_work, decrypt); 4746 int rc; 4747 struct mid_q_entry *mid; 4748 struct iov_iter iter; 4749 4750 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4751 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4752 &iter, true); 4753 if (rc) { 4754 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4755 goto free_pages; 4756 } 4757 4758 dw->server->lstrp = jiffies; 4759 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4760 if (mid == NULL) 4761 cifs_dbg(FYI, "mid not found\n"); 4762 else { 4763 mid->decrypted = true; 4764 rc = handle_read_data(dw->server, mid, dw->buf, 4765 dw->server->vals->read_rsp_size, 4766 &dw->buffer, dw->len, 4767 true); 4768 if (rc >= 0) { 4769 #ifdef CONFIG_CIFS_STATS2 4770 mid->when_received = jiffies; 4771 #endif 4772 if (dw->server->ops->is_network_name_deleted) 4773 dw->server->ops->is_network_name_deleted(dw->buf, 4774 dw->server); 4775 4776 mid->callback(mid); 4777 } else { 4778 spin_lock(&dw->server->srv_lock); 4779 if (dw->server->tcpStatus == CifsNeedReconnect) { 4780 spin_lock(&dw->server->mid_lock); 4781 mid->mid_state = MID_RETRY_NEEDED; 4782 spin_unlock(&dw->server->mid_lock); 4783 spin_unlock(&dw->server->srv_lock); 4784 mid->callback(mid); 4785 } else { 4786 spin_lock(&dw->server->mid_lock); 4787 mid->mid_state = MID_REQUEST_SUBMITTED; 4788 mid->mid_flags &= ~(MID_DELETED); 4789 list_add_tail(&mid->qhead, 4790 &dw->server->pending_mid_q); 4791 spin_unlock(&dw->server->mid_lock); 4792 spin_unlock(&dw->server->srv_lock); 4793 } 4794 } 4795 release_mid(mid); 4796 } 4797 4798 free_pages: 4799 cifs_clear_xarray_buffer(&dw->buffer); 4800 cifs_small_buf_release(dw->buf); 4801 kfree(dw); 4802 } 4803 4804 4805 static int 4806 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4807 int *num_mids) 4808 { 4809 struct page *page; 4810 char *buf = server->smallbuf; 4811 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4812 struct iov_iter iter; 4813 unsigned int len, npages; 4814 unsigned int buflen = server->pdu_size; 4815 int rc; 4816 int i = 0; 4817 struct smb2_decrypt_work *dw; 4818 4819 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4820 if (!dw) 4821 return -ENOMEM; 4822 xa_init(&dw->buffer); 4823 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4824 dw->server = server; 4825 4826 *num_mids = 1; 4827 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4828 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4829 4830 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4831 if (rc < 0) 4832 goto free_dw; 4833 server->total_read += rc; 4834 4835 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4836 server->vals->read_rsp_size; 4837 dw->len = len; 4838 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4839 4840 rc = -ENOMEM; 4841 for (; i < npages; i++) { 4842 void *old; 4843 4844 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4845 if (!page) 4846 goto discard_data; 4847 page->index = i; 4848 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4849 if (xa_is_err(old)) { 4850 rc = xa_err(old); 4851 put_page(page); 4852 goto discard_data; 4853 } 4854 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4855 } 4856 4857 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4858 4859 /* Read the data into the buffer and clear excess bufferage. */ 4860 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4861 if (rc < 0) 4862 goto discard_data; 4863 4864 server->total_read += rc; 4865 if (rc < npages * PAGE_SIZE) 4866 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4867 iov_iter_revert(&iter, npages * PAGE_SIZE); 4868 iov_iter_truncate(&iter, dw->len); 4869 4870 rc = cifs_discard_remaining_data(server); 4871 if (rc) 4872 goto free_pages; 4873 4874 /* 4875 * For large reads, offload to different thread for better performance, 4876 * use more cores decrypting which can be expensive 4877 */ 4878 4879 if ((server->min_offload) && (server->in_flight > 1) && 4880 (server->pdu_size >= server->min_offload)) { 4881 dw->buf = server->smallbuf; 4882 server->smallbuf = (char *)cifs_small_buf_get(); 4883 4884 queue_work(decrypt_wq, &dw->decrypt); 4885 *num_mids = 0; /* worker thread takes care of finding mid */ 4886 return -1; 4887 } 4888 4889 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4890 &iter, false); 4891 if (rc) 4892 goto free_pages; 4893 4894 *mid = smb2_find_mid(server, buf); 4895 if (*mid == NULL) { 4896 cifs_dbg(FYI, "mid not found\n"); 4897 } else { 4898 cifs_dbg(FYI, "mid found\n"); 4899 (*mid)->decrypted = true; 4900 rc = handle_read_data(server, *mid, buf, 4901 server->vals->read_rsp_size, 4902 &dw->buffer, dw->len, false); 4903 if (rc >= 0) { 4904 if (server->ops->is_network_name_deleted) { 4905 server->ops->is_network_name_deleted(buf, 4906 server); 4907 } 4908 } 4909 } 4910 4911 free_pages: 4912 cifs_clear_xarray_buffer(&dw->buffer); 4913 free_dw: 4914 kfree(dw); 4915 return rc; 4916 discard_data: 4917 cifs_discard_remaining_data(server); 4918 goto free_pages; 4919 } 4920 4921 static int 4922 receive_encrypted_standard(struct TCP_Server_Info *server, 4923 struct mid_q_entry **mids, char **bufs, 4924 int *num_mids) 4925 { 4926 int ret, length; 4927 char *buf = server->smallbuf; 4928 struct smb2_hdr *shdr; 4929 unsigned int pdu_length = server->pdu_size; 4930 unsigned int buf_size; 4931 struct mid_q_entry *mid_entry; 4932 int next_is_large; 4933 char *next_buffer = NULL; 4934 4935 *num_mids = 0; 4936 4937 /* switch to large buffer if too big for a small one */ 4938 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4939 server->large_buf = true; 4940 memcpy(server->bigbuf, buf, server->total_read); 4941 buf = server->bigbuf; 4942 } 4943 4944 /* now read the rest */ 4945 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4946 pdu_length - HEADER_SIZE(server) + 1); 4947 if (length < 0) 4948 return length; 4949 server->total_read += length; 4950 4951 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4952 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4953 if (length) 4954 return length; 4955 4956 next_is_large = server->large_buf; 4957 one_more: 4958 shdr = (struct smb2_hdr *)buf; 4959 if (shdr->NextCommand) { 4960 if (next_is_large) 4961 next_buffer = (char *)cifs_buf_get(); 4962 else 4963 next_buffer = (char *)cifs_small_buf_get(); 4964 memcpy(next_buffer, 4965 buf + le32_to_cpu(shdr->NextCommand), 4966 pdu_length - le32_to_cpu(shdr->NextCommand)); 4967 } 4968 4969 mid_entry = smb2_find_mid(server, buf); 4970 if (mid_entry == NULL) 4971 cifs_dbg(FYI, "mid not found\n"); 4972 else { 4973 cifs_dbg(FYI, "mid found\n"); 4974 mid_entry->decrypted = true; 4975 mid_entry->resp_buf_size = server->pdu_size; 4976 } 4977 4978 if (*num_mids >= MAX_COMPOUND) { 4979 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 4980 return -1; 4981 } 4982 bufs[*num_mids] = buf; 4983 mids[(*num_mids)++] = mid_entry; 4984 4985 if (mid_entry && mid_entry->handle) 4986 ret = mid_entry->handle(server, mid_entry); 4987 else 4988 ret = cifs_handle_standard(server, mid_entry); 4989 4990 if (ret == 0 && shdr->NextCommand) { 4991 pdu_length -= le32_to_cpu(shdr->NextCommand); 4992 server->large_buf = next_is_large; 4993 if (next_is_large) 4994 server->bigbuf = buf = next_buffer; 4995 else 4996 server->smallbuf = buf = next_buffer; 4997 goto one_more; 4998 } else if (ret != 0) { 4999 /* 5000 * ret != 0 here means that we didn't get to handle_mid() thus 5001 * server->smallbuf and server->bigbuf are still valid. We need 5002 * to free next_buffer because it is not going to be used 5003 * anywhere. 5004 */ 5005 if (next_is_large) 5006 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5007 else 5008 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5009 } 5010 5011 return ret; 5012 } 5013 5014 static int 5015 smb3_receive_transform(struct TCP_Server_Info *server, 5016 struct mid_q_entry **mids, char **bufs, int *num_mids) 5017 { 5018 char *buf = server->smallbuf; 5019 unsigned int pdu_length = server->pdu_size; 5020 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5021 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5022 5023 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5024 sizeof(struct smb2_hdr)) { 5025 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5026 pdu_length); 5027 cifs_reconnect(server, true); 5028 return -ECONNABORTED; 5029 } 5030 5031 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5032 cifs_server_dbg(VFS, "Transform message is broken\n"); 5033 cifs_reconnect(server, true); 5034 return -ECONNABORTED; 5035 } 5036 5037 /* TODO: add support for compounds containing READ. */ 5038 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5039 return receive_encrypted_read(server, &mids[0], num_mids); 5040 } 5041 5042 return receive_encrypted_standard(server, mids, bufs, num_mids); 5043 } 5044 5045 int 5046 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5047 { 5048 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5049 5050 return handle_read_data(server, mid, buf, server->pdu_size, 5051 NULL, 0, false); 5052 } 5053 5054 static int 5055 smb2_next_header(char *buf) 5056 { 5057 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5058 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5059 5060 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) 5061 return sizeof(struct smb2_transform_hdr) + 5062 le32_to_cpu(t_hdr->OriginalMessageSize); 5063 5064 return le32_to_cpu(hdr->NextCommand); 5065 } 5066 5067 static int 5068 smb2_make_node(unsigned int xid, struct inode *inode, 5069 struct dentry *dentry, struct cifs_tcon *tcon, 5070 const char *full_path, umode_t mode, dev_t dev) 5071 { 5072 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5073 int rc = -EPERM; 5074 struct cifs_open_info_data buf = {}; 5075 struct cifs_io_parms io_parms = {0}; 5076 __u32 oplock = 0; 5077 struct cifs_fid fid; 5078 struct cifs_open_parms oparms; 5079 unsigned int bytes_written; 5080 struct win_dev *pdev; 5081 struct kvec iov[2]; 5082 5083 /* 5084 * Check if mounted with mount parm 'sfu' mount parm. 5085 * SFU emulation should work with all servers, but only 5086 * supports block and char device (no socket & fifo), 5087 * and was used by default in earlier versions of Windows 5088 */ 5089 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) 5090 return rc; 5091 5092 /* 5093 * TODO: Add ability to create instead via reparse point. Windows (e.g. 5094 * their current NFS server) uses this approach to expose special files 5095 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions 5096 */ 5097 5098 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 5099 return rc; 5100 5101 cifs_dbg(FYI, "sfu compat create special file\n"); 5102 5103 oparms = (struct cifs_open_parms) { 5104 .tcon = tcon, 5105 .cifs_sb = cifs_sb, 5106 .desired_access = GENERIC_WRITE, 5107 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 5108 CREATE_OPTION_SPECIAL), 5109 .disposition = FILE_CREATE, 5110 .path = full_path, 5111 .fid = &fid, 5112 }; 5113 5114 if (tcon->ses->server->oplocks) 5115 oplock = REQ_OPLOCK; 5116 else 5117 oplock = 0; 5118 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf); 5119 if (rc) 5120 return rc; 5121 5122 /* 5123 * BB Do not bother to decode buf since no local inode yet to put 5124 * timestamps in, but we can reuse it safely. 5125 */ 5126 5127 pdev = (struct win_dev *)&buf.fi; 5128 io_parms.pid = current->tgid; 5129 io_parms.tcon = tcon; 5130 io_parms.offset = 0; 5131 io_parms.length = sizeof(struct win_dev); 5132 iov[1].iov_base = &buf.fi; 5133 iov[1].iov_len = sizeof(struct win_dev); 5134 if (S_ISCHR(mode)) { 5135 memcpy(pdev->type, "IntxCHR", 8); 5136 pdev->major = cpu_to_le64(MAJOR(dev)); 5137 pdev->minor = cpu_to_le64(MINOR(dev)); 5138 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, 5139 &bytes_written, iov, 1); 5140 } else if (S_ISBLK(mode)) { 5141 memcpy(pdev->type, "IntxBLK", 8); 5142 pdev->major = cpu_to_le64(MAJOR(dev)); 5143 pdev->minor = cpu_to_le64(MINOR(dev)); 5144 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, 5145 &bytes_written, iov, 1); 5146 } else if (S_ISFIFO(mode)) { 5147 memcpy(pdev->type, "LnxFIFO", 8); 5148 pdev->major = 0; 5149 pdev->minor = 0; 5150 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, 5151 &bytes_written, iov, 1); 5152 } 5153 tcon->ses->server->ops->close(xid, tcon, &fid); 5154 d_drop(dentry); 5155 5156 /* FIXME: add code here to set EAs */ 5157 5158 cifs_free_open_info(&buf); 5159 return rc; 5160 } 5161 5162 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5163 struct smb_version_operations smb20_operations = { 5164 .compare_fids = smb2_compare_fids, 5165 .setup_request = smb2_setup_request, 5166 .setup_async_request = smb2_setup_async_request, 5167 .check_receive = smb2_check_receive, 5168 .add_credits = smb2_add_credits, 5169 .set_credits = smb2_set_credits, 5170 .get_credits_field = smb2_get_credits_field, 5171 .get_credits = smb2_get_credits, 5172 .wait_mtu_credits = cifs_wait_mtu_credits, 5173 .get_next_mid = smb2_get_next_mid, 5174 .revert_current_mid = smb2_revert_current_mid, 5175 .read_data_offset = smb2_read_data_offset, 5176 .read_data_length = smb2_read_data_length, 5177 .map_error = map_smb2_to_linux_error, 5178 .find_mid = smb2_find_mid, 5179 .check_message = smb2_check_message, 5180 .dump_detail = smb2_dump_detail, 5181 .clear_stats = smb2_clear_stats, 5182 .print_stats = smb2_print_stats, 5183 .is_oplock_break = smb2_is_valid_oplock_break, 5184 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5185 .downgrade_oplock = smb2_downgrade_oplock, 5186 .need_neg = smb2_need_neg, 5187 .negotiate = smb2_negotiate, 5188 .negotiate_wsize = smb2_negotiate_wsize, 5189 .negotiate_rsize = smb2_negotiate_rsize, 5190 .sess_setup = SMB2_sess_setup, 5191 .logoff = SMB2_logoff, 5192 .tree_connect = SMB2_tcon, 5193 .tree_disconnect = SMB2_tdis, 5194 .qfs_tcon = smb2_qfs_tcon, 5195 .is_path_accessible = smb2_is_path_accessible, 5196 .can_echo = smb2_can_echo, 5197 .echo = SMB2_echo, 5198 .query_path_info = smb2_query_path_info, 5199 .query_reparse_point = smb2_query_reparse_point, 5200 .get_srv_inum = smb2_get_srv_inum, 5201 .query_file_info = smb2_query_file_info, 5202 .set_path_size = smb2_set_path_size, 5203 .set_file_size = smb2_set_file_size, 5204 .set_file_info = smb2_set_file_info, 5205 .set_compression = smb2_set_compression, 5206 .mkdir = smb2_mkdir, 5207 .mkdir_setinfo = smb2_mkdir_setinfo, 5208 .rmdir = smb2_rmdir, 5209 .unlink = smb2_unlink, 5210 .rename = smb2_rename_path, 5211 .create_hardlink = smb2_create_hardlink, 5212 .query_symlink = smb2_query_symlink, 5213 .query_mf_symlink = smb3_query_mf_symlink, 5214 .create_mf_symlink = smb3_create_mf_symlink, 5215 .open = smb2_open_file, 5216 .set_fid = smb2_set_fid, 5217 .close = smb2_close_file, 5218 .flush = smb2_flush_file, 5219 .async_readv = smb2_async_readv, 5220 .async_writev = smb2_async_writev, 5221 .sync_read = smb2_sync_read, 5222 .sync_write = smb2_sync_write, 5223 .query_dir_first = smb2_query_dir_first, 5224 .query_dir_next = smb2_query_dir_next, 5225 .close_dir = smb2_close_dir, 5226 .calc_smb_size = smb2_calc_size, 5227 .is_status_pending = smb2_is_status_pending, 5228 .is_session_expired = smb2_is_session_expired, 5229 .oplock_response = smb2_oplock_response, 5230 .queryfs = smb2_queryfs, 5231 .mand_lock = smb2_mand_lock, 5232 .mand_unlock_range = smb2_unlock_range, 5233 .push_mand_locks = smb2_push_mandatory_locks, 5234 .get_lease_key = smb2_get_lease_key, 5235 .set_lease_key = smb2_set_lease_key, 5236 .new_lease_key = smb2_new_lease_key, 5237 .calc_signature = smb2_calc_signature, 5238 .is_read_op = smb2_is_read_op, 5239 .set_oplock_level = smb2_set_oplock_level, 5240 .create_lease_buf = smb2_create_lease_buf, 5241 .parse_lease_buf = smb2_parse_lease_buf, 5242 .copychunk_range = smb2_copychunk_range, 5243 .wp_retry_size = smb2_wp_retry_size, 5244 .dir_needs_close = smb2_dir_needs_close, 5245 .get_dfs_refer = smb2_get_dfs_refer, 5246 .select_sectype = smb2_select_sectype, 5247 #ifdef CONFIG_CIFS_XATTR 5248 .query_all_EAs = smb2_query_eas, 5249 .set_EA = smb2_set_ea, 5250 #endif /* CIFS_XATTR */ 5251 .get_acl = get_smb2_acl, 5252 .get_acl_by_fid = get_smb2_acl_by_fid, 5253 .set_acl = set_smb2_acl, 5254 .next_header = smb2_next_header, 5255 .ioctl_query_info = smb2_ioctl_query_info, 5256 .make_node = smb2_make_node, 5257 .fiemap = smb3_fiemap, 5258 .llseek = smb3_llseek, 5259 .is_status_io_timeout = smb2_is_status_io_timeout, 5260 .is_network_name_deleted = smb2_is_network_name_deleted, 5261 }; 5262 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5263 5264 struct smb_version_operations smb21_operations = { 5265 .compare_fids = smb2_compare_fids, 5266 .setup_request = smb2_setup_request, 5267 .setup_async_request = smb2_setup_async_request, 5268 .check_receive = smb2_check_receive, 5269 .add_credits = smb2_add_credits, 5270 .set_credits = smb2_set_credits, 5271 .get_credits_field = smb2_get_credits_field, 5272 .get_credits = smb2_get_credits, 5273 .wait_mtu_credits = smb2_wait_mtu_credits, 5274 .adjust_credits = smb2_adjust_credits, 5275 .get_next_mid = smb2_get_next_mid, 5276 .revert_current_mid = smb2_revert_current_mid, 5277 .read_data_offset = smb2_read_data_offset, 5278 .read_data_length = smb2_read_data_length, 5279 .map_error = map_smb2_to_linux_error, 5280 .find_mid = smb2_find_mid, 5281 .check_message = smb2_check_message, 5282 .dump_detail = smb2_dump_detail, 5283 .clear_stats = smb2_clear_stats, 5284 .print_stats = smb2_print_stats, 5285 .is_oplock_break = smb2_is_valid_oplock_break, 5286 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5287 .downgrade_oplock = smb2_downgrade_oplock, 5288 .need_neg = smb2_need_neg, 5289 .negotiate = smb2_negotiate, 5290 .negotiate_wsize = smb2_negotiate_wsize, 5291 .negotiate_rsize = smb2_negotiate_rsize, 5292 .sess_setup = SMB2_sess_setup, 5293 .logoff = SMB2_logoff, 5294 .tree_connect = SMB2_tcon, 5295 .tree_disconnect = SMB2_tdis, 5296 .qfs_tcon = smb2_qfs_tcon, 5297 .is_path_accessible = smb2_is_path_accessible, 5298 .can_echo = smb2_can_echo, 5299 .echo = SMB2_echo, 5300 .query_path_info = smb2_query_path_info, 5301 .query_reparse_point = smb2_query_reparse_point, 5302 .get_srv_inum = smb2_get_srv_inum, 5303 .query_file_info = smb2_query_file_info, 5304 .set_path_size = smb2_set_path_size, 5305 .set_file_size = smb2_set_file_size, 5306 .set_file_info = smb2_set_file_info, 5307 .set_compression = smb2_set_compression, 5308 .mkdir = smb2_mkdir, 5309 .mkdir_setinfo = smb2_mkdir_setinfo, 5310 .rmdir = smb2_rmdir, 5311 .unlink = smb2_unlink, 5312 .rename = smb2_rename_path, 5313 .create_hardlink = smb2_create_hardlink, 5314 .query_symlink = smb2_query_symlink, 5315 .query_mf_symlink = smb3_query_mf_symlink, 5316 .create_mf_symlink = smb3_create_mf_symlink, 5317 .open = smb2_open_file, 5318 .set_fid = smb2_set_fid, 5319 .close = smb2_close_file, 5320 .flush = smb2_flush_file, 5321 .async_readv = smb2_async_readv, 5322 .async_writev = smb2_async_writev, 5323 .sync_read = smb2_sync_read, 5324 .sync_write = smb2_sync_write, 5325 .query_dir_first = smb2_query_dir_first, 5326 .query_dir_next = smb2_query_dir_next, 5327 .close_dir = smb2_close_dir, 5328 .calc_smb_size = smb2_calc_size, 5329 .is_status_pending = smb2_is_status_pending, 5330 .is_session_expired = smb2_is_session_expired, 5331 .oplock_response = smb2_oplock_response, 5332 .queryfs = smb2_queryfs, 5333 .mand_lock = smb2_mand_lock, 5334 .mand_unlock_range = smb2_unlock_range, 5335 .push_mand_locks = smb2_push_mandatory_locks, 5336 .get_lease_key = smb2_get_lease_key, 5337 .set_lease_key = smb2_set_lease_key, 5338 .new_lease_key = smb2_new_lease_key, 5339 .calc_signature = smb2_calc_signature, 5340 .is_read_op = smb21_is_read_op, 5341 .set_oplock_level = smb21_set_oplock_level, 5342 .create_lease_buf = smb2_create_lease_buf, 5343 .parse_lease_buf = smb2_parse_lease_buf, 5344 .copychunk_range = smb2_copychunk_range, 5345 .wp_retry_size = smb2_wp_retry_size, 5346 .dir_needs_close = smb2_dir_needs_close, 5347 .enum_snapshots = smb3_enum_snapshots, 5348 .notify = smb3_notify, 5349 .get_dfs_refer = smb2_get_dfs_refer, 5350 .select_sectype = smb2_select_sectype, 5351 #ifdef CONFIG_CIFS_XATTR 5352 .query_all_EAs = smb2_query_eas, 5353 .set_EA = smb2_set_ea, 5354 #endif /* CIFS_XATTR */ 5355 .get_acl = get_smb2_acl, 5356 .get_acl_by_fid = get_smb2_acl_by_fid, 5357 .set_acl = set_smb2_acl, 5358 .next_header = smb2_next_header, 5359 .ioctl_query_info = smb2_ioctl_query_info, 5360 .make_node = smb2_make_node, 5361 .fiemap = smb3_fiemap, 5362 .llseek = smb3_llseek, 5363 .is_status_io_timeout = smb2_is_status_io_timeout, 5364 .is_network_name_deleted = smb2_is_network_name_deleted, 5365 }; 5366 5367 struct smb_version_operations smb30_operations = { 5368 .compare_fids = smb2_compare_fids, 5369 .setup_request = smb2_setup_request, 5370 .setup_async_request = smb2_setup_async_request, 5371 .check_receive = smb2_check_receive, 5372 .add_credits = smb2_add_credits, 5373 .set_credits = smb2_set_credits, 5374 .get_credits_field = smb2_get_credits_field, 5375 .get_credits = smb2_get_credits, 5376 .wait_mtu_credits = smb2_wait_mtu_credits, 5377 .adjust_credits = smb2_adjust_credits, 5378 .get_next_mid = smb2_get_next_mid, 5379 .revert_current_mid = smb2_revert_current_mid, 5380 .read_data_offset = smb2_read_data_offset, 5381 .read_data_length = smb2_read_data_length, 5382 .map_error = map_smb2_to_linux_error, 5383 .find_mid = smb2_find_mid, 5384 .check_message = smb2_check_message, 5385 .dump_detail = smb2_dump_detail, 5386 .clear_stats = smb2_clear_stats, 5387 .print_stats = smb2_print_stats, 5388 .dump_share_caps = smb2_dump_share_caps, 5389 .is_oplock_break = smb2_is_valid_oplock_break, 5390 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5391 .downgrade_oplock = smb3_downgrade_oplock, 5392 .need_neg = smb2_need_neg, 5393 .negotiate = smb2_negotiate, 5394 .negotiate_wsize = smb3_negotiate_wsize, 5395 .negotiate_rsize = smb3_negotiate_rsize, 5396 .sess_setup = SMB2_sess_setup, 5397 .logoff = SMB2_logoff, 5398 .tree_connect = SMB2_tcon, 5399 .tree_disconnect = SMB2_tdis, 5400 .qfs_tcon = smb3_qfs_tcon, 5401 .is_path_accessible = smb2_is_path_accessible, 5402 .can_echo = smb2_can_echo, 5403 .echo = SMB2_echo, 5404 .query_path_info = smb2_query_path_info, 5405 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5406 .query_reparse_point = smb2_query_reparse_point, 5407 .get_srv_inum = smb2_get_srv_inum, 5408 .query_file_info = smb2_query_file_info, 5409 .set_path_size = smb2_set_path_size, 5410 .set_file_size = smb2_set_file_size, 5411 .set_file_info = smb2_set_file_info, 5412 .set_compression = smb2_set_compression, 5413 .mkdir = smb2_mkdir, 5414 .mkdir_setinfo = smb2_mkdir_setinfo, 5415 .rmdir = smb2_rmdir, 5416 .unlink = smb2_unlink, 5417 .rename = smb2_rename_path, 5418 .create_hardlink = smb2_create_hardlink, 5419 .query_symlink = smb2_query_symlink, 5420 .query_mf_symlink = smb3_query_mf_symlink, 5421 .create_mf_symlink = smb3_create_mf_symlink, 5422 .open = smb2_open_file, 5423 .set_fid = smb2_set_fid, 5424 .close = smb2_close_file, 5425 .close_getattr = smb2_close_getattr, 5426 .flush = smb2_flush_file, 5427 .async_readv = smb2_async_readv, 5428 .async_writev = smb2_async_writev, 5429 .sync_read = smb2_sync_read, 5430 .sync_write = smb2_sync_write, 5431 .query_dir_first = smb2_query_dir_first, 5432 .query_dir_next = smb2_query_dir_next, 5433 .close_dir = smb2_close_dir, 5434 .calc_smb_size = smb2_calc_size, 5435 .is_status_pending = smb2_is_status_pending, 5436 .is_session_expired = smb2_is_session_expired, 5437 .oplock_response = smb2_oplock_response, 5438 .queryfs = smb2_queryfs, 5439 .mand_lock = smb2_mand_lock, 5440 .mand_unlock_range = smb2_unlock_range, 5441 .push_mand_locks = smb2_push_mandatory_locks, 5442 .get_lease_key = smb2_get_lease_key, 5443 .set_lease_key = smb2_set_lease_key, 5444 .new_lease_key = smb2_new_lease_key, 5445 .generate_signingkey = generate_smb30signingkey, 5446 .calc_signature = smb3_calc_signature, 5447 .set_integrity = smb3_set_integrity, 5448 .is_read_op = smb21_is_read_op, 5449 .set_oplock_level = smb3_set_oplock_level, 5450 .create_lease_buf = smb3_create_lease_buf, 5451 .parse_lease_buf = smb3_parse_lease_buf, 5452 .copychunk_range = smb2_copychunk_range, 5453 .duplicate_extents = smb2_duplicate_extents, 5454 .validate_negotiate = smb3_validate_negotiate, 5455 .wp_retry_size = smb2_wp_retry_size, 5456 .dir_needs_close = smb2_dir_needs_close, 5457 .fallocate = smb3_fallocate, 5458 .enum_snapshots = smb3_enum_snapshots, 5459 .notify = smb3_notify, 5460 .init_transform_rq = smb3_init_transform_rq, 5461 .is_transform_hdr = smb3_is_transform_hdr, 5462 .receive_transform = smb3_receive_transform, 5463 .get_dfs_refer = smb2_get_dfs_refer, 5464 .select_sectype = smb2_select_sectype, 5465 #ifdef CONFIG_CIFS_XATTR 5466 .query_all_EAs = smb2_query_eas, 5467 .set_EA = smb2_set_ea, 5468 #endif /* CIFS_XATTR */ 5469 .get_acl = get_smb2_acl, 5470 .get_acl_by_fid = get_smb2_acl_by_fid, 5471 .set_acl = set_smb2_acl, 5472 .next_header = smb2_next_header, 5473 .ioctl_query_info = smb2_ioctl_query_info, 5474 .make_node = smb2_make_node, 5475 .fiemap = smb3_fiemap, 5476 .llseek = smb3_llseek, 5477 .is_status_io_timeout = smb2_is_status_io_timeout, 5478 .is_network_name_deleted = smb2_is_network_name_deleted, 5479 }; 5480 5481 struct smb_version_operations smb311_operations = { 5482 .compare_fids = smb2_compare_fids, 5483 .setup_request = smb2_setup_request, 5484 .setup_async_request = smb2_setup_async_request, 5485 .check_receive = smb2_check_receive, 5486 .add_credits = smb2_add_credits, 5487 .set_credits = smb2_set_credits, 5488 .get_credits_field = smb2_get_credits_field, 5489 .get_credits = smb2_get_credits, 5490 .wait_mtu_credits = smb2_wait_mtu_credits, 5491 .adjust_credits = smb2_adjust_credits, 5492 .get_next_mid = smb2_get_next_mid, 5493 .revert_current_mid = smb2_revert_current_mid, 5494 .read_data_offset = smb2_read_data_offset, 5495 .read_data_length = smb2_read_data_length, 5496 .map_error = map_smb2_to_linux_error, 5497 .find_mid = smb2_find_mid, 5498 .check_message = smb2_check_message, 5499 .dump_detail = smb2_dump_detail, 5500 .clear_stats = smb2_clear_stats, 5501 .print_stats = smb2_print_stats, 5502 .dump_share_caps = smb2_dump_share_caps, 5503 .is_oplock_break = smb2_is_valid_oplock_break, 5504 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5505 .downgrade_oplock = smb3_downgrade_oplock, 5506 .need_neg = smb2_need_neg, 5507 .negotiate = smb2_negotiate, 5508 .negotiate_wsize = smb3_negotiate_wsize, 5509 .negotiate_rsize = smb3_negotiate_rsize, 5510 .sess_setup = SMB2_sess_setup, 5511 .logoff = SMB2_logoff, 5512 .tree_connect = SMB2_tcon, 5513 .tree_disconnect = SMB2_tdis, 5514 .qfs_tcon = smb3_qfs_tcon, 5515 .is_path_accessible = smb2_is_path_accessible, 5516 .can_echo = smb2_can_echo, 5517 .echo = SMB2_echo, 5518 .query_path_info = smb2_query_path_info, 5519 .query_reparse_point = smb2_query_reparse_point, 5520 .get_srv_inum = smb2_get_srv_inum, 5521 .query_file_info = smb2_query_file_info, 5522 .set_path_size = smb2_set_path_size, 5523 .set_file_size = smb2_set_file_size, 5524 .set_file_info = smb2_set_file_info, 5525 .set_compression = smb2_set_compression, 5526 .mkdir = smb2_mkdir, 5527 .mkdir_setinfo = smb2_mkdir_setinfo, 5528 .posix_mkdir = smb311_posix_mkdir, 5529 .rmdir = smb2_rmdir, 5530 .unlink = smb2_unlink, 5531 .rename = smb2_rename_path, 5532 .create_hardlink = smb2_create_hardlink, 5533 .query_symlink = smb2_query_symlink, 5534 .query_mf_symlink = smb3_query_mf_symlink, 5535 .create_mf_symlink = smb3_create_mf_symlink, 5536 .open = smb2_open_file, 5537 .set_fid = smb2_set_fid, 5538 .close = smb2_close_file, 5539 .close_getattr = smb2_close_getattr, 5540 .flush = smb2_flush_file, 5541 .async_readv = smb2_async_readv, 5542 .async_writev = smb2_async_writev, 5543 .sync_read = smb2_sync_read, 5544 .sync_write = smb2_sync_write, 5545 .query_dir_first = smb2_query_dir_first, 5546 .query_dir_next = smb2_query_dir_next, 5547 .close_dir = smb2_close_dir, 5548 .calc_smb_size = smb2_calc_size, 5549 .is_status_pending = smb2_is_status_pending, 5550 .is_session_expired = smb2_is_session_expired, 5551 .oplock_response = smb2_oplock_response, 5552 .queryfs = smb311_queryfs, 5553 .mand_lock = smb2_mand_lock, 5554 .mand_unlock_range = smb2_unlock_range, 5555 .push_mand_locks = smb2_push_mandatory_locks, 5556 .get_lease_key = smb2_get_lease_key, 5557 .set_lease_key = smb2_set_lease_key, 5558 .new_lease_key = smb2_new_lease_key, 5559 .generate_signingkey = generate_smb311signingkey, 5560 .calc_signature = smb3_calc_signature, 5561 .set_integrity = smb3_set_integrity, 5562 .is_read_op = smb21_is_read_op, 5563 .set_oplock_level = smb3_set_oplock_level, 5564 .create_lease_buf = smb3_create_lease_buf, 5565 .parse_lease_buf = smb3_parse_lease_buf, 5566 .copychunk_range = smb2_copychunk_range, 5567 .duplicate_extents = smb2_duplicate_extents, 5568 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5569 .wp_retry_size = smb2_wp_retry_size, 5570 .dir_needs_close = smb2_dir_needs_close, 5571 .fallocate = smb3_fallocate, 5572 .enum_snapshots = smb3_enum_snapshots, 5573 .notify = smb3_notify, 5574 .init_transform_rq = smb3_init_transform_rq, 5575 .is_transform_hdr = smb3_is_transform_hdr, 5576 .receive_transform = smb3_receive_transform, 5577 .get_dfs_refer = smb2_get_dfs_refer, 5578 .select_sectype = smb2_select_sectype, 5579 #ifdef CONFIG_CIFS_XATTR 5580 .query_all_EAs = smb2_query_eas, 5581 .set_EA = smb2_set_ea, 5582 #endif /* CIFS_XATTR */ 5583 .get_acl = get_smb2_acl, 5584 .get_acl_by_fid = get_smb2_acl_by_fid, 5585 .set_acl = set_smb2_acl, 5586 .next_header = smb2_next_header, 5587 .ioctl_query_info = smb2_ioctl_query_info, 5588 .make_node = smb2_make_node, 5589 .fiemap = smb3_fiemap, 5590 .llseek = smb3_llseek, 5591 .is_status_io_timeout = smb2_is_status_io_timeout, 5592 .is_network_name_deleted = smb2_is_network_name_deleted, 5593 }; 5594 5595 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5596 struct smb_version_values smb20_values = { 5597 .version_string = SMB20_VERSION_STRING, 5598 .protocol_id = SMB20_PROT_ID, 5599 .req_capabilities = 0, /* MBZ */ 5600 .large_lock_type = 0, 5601 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5602 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5603 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5604 .header_size = sizeof(struct smb2_hdr), 5605 .header_preamble_size = 0, 5606 .max_header_size = MAX_SMB2_HDR_SIZE, 5607 .read_rsp_size = sizeof(struct smb2_read_rsp), 5608 .lock_cmd = SMB2_LOCK, 5609 .cap_unix = 0, 5610 .cap_nt_find = SMB2_NT_FIND, 5611 .cap_large_files = SMB2_LARGE_FILES, 5612 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5613 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5614 .create_lease_size = sizeof(struct create_lease), 5615 }; 5616 #endif /* ALLOW_INSECURE_LEGACY */ 5617 5618 struct smb_version_values smb21_values = { 5619 .version_string = SMB21_VERSION_STRING, 5620 .protocol_id = SMB21_PROT_ID, 5621 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5622 .large_lock_type = 0, 5623 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5624 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5625 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5626 .header_size = sizeof(struct smb2_hdr), 5627 .header_preamble_size = 0, 5628 .max_header_size = MAX_SMB2_HDR_SIZE, 5629 .read_rsp_size = sizeof(struct smb2_read_rsp), 5630 .lock_cmd = SMB2_LOCK, 5631 .cap_unix = 0, 5632 .cap_nt_find = SMB2_NT_FIND, 5633 .cap_large_files = SMB2_LARGE_FILES, 5634 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5635 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5636 .create_lease_size = sizeof(struct create_lease), 5637 }; 5638 5639 struct smb_version_values smb3any_values = { 5640 .version_string = SMB3ANY_VERSION_STRING, 5641 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5642 .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, 5643 .large_lock_type = 0, 5644 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5645 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5646 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5647 .header_size = sizeof(struct smb2_hdr), 5648 .header_preamble_size = 0, 5649 .max_header_size = MAX_SMB2_HDR_SIZE, 5650 .read_rsp_size = sizeof(struct smb2_read_rsp), 5651 .lock_cmd = SMB2_LOCK, 5652 .cap_unix = 0, 5653 .cap_nt_find = SMB2_NT_FIND, 5654 .cap_large_files = SMB2_LARGE_FILES, 5655 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5656 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5657 .create_lease_size = sizeof(struct create_lease_v2), 5658 }; 5659 5660 struct smb_version_values smbdefault_values = { 5661 .version_string = SMBDEFAULT_VERSION_STRING, 5662 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5663 .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, 5664 .large_lock_type = 0, 5665 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5666 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5667 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5668 .header_size = sizeof(struct smb2_hdr), 5669 .header_preamble_size = 0, 5670 .max_header_size = MAX_SMB2_HDR_SIZE, 5671 .read_rsp_size = sizeof(struct smb2_read_rsp), 5672 .lock_cmd = SMB2_LOCK, 5673 .cap_unix = 0, 5674 .cap_nt_find = SMB2_NT_FIND, 5675 .cap_large_files = SMB2_LARGE_FILES, 5676 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5677 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5678 .create_lease_size = sizeof(struct create_lease_v2), 5679 }; 5680 5681 struct smb_version_values smb30_values = { 5682 .version_string = SMB30_VERSION_STRING, 5683 .protocol_id = SMB30_PROT_ID, 5684 .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, 5685 .large_lock_type = 0, 5686 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5687 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5688 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5689 .header_size = sizeof(struct smb2_hdr), 5690 .header_preamble_size = 0, 5691 .max_header_size = MAX_SMB2_HDR_SIZE, 5692 .read_rsp_size = sizeof(struct smb2_read_rsp), 5693 .lock_cmd = SMB2_LOCK, 5694 .cap_unix = 0, 5695 .cap_nt_find = SMB2_NT_FIND, 5696 .cap_large_files = SMB2_LARGE_FILES, 5697 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5698 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5699 .create_lease_size = sizeof(struct create_lease_v2), 5700 }; 5701 5702 struct smb_version_values smb302_values = { 5703 .version_string = SMB302_VERSION_STRING, 5704 .protocol_id = SMB302_PROT_ID, 5705 .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, 5706 .large_lock_type = 0, 5707 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5708 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5709 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5710 .header_size = sizeof(struct smb2_hdr), 5711 .header_preamble_size = 0, 5712 .max_header_size = MAX_SMB2_HDR_SIZE, 5713 .read_rsp_size = sizeof(struct smb2_read_rsp), 5714 .lock_cmd = SMB2_LOCK, 5715 .cap_unix = 0, 5716 .cap_nt_find = SMB2_NT_FIND, 5717 .cap_large_files = SMB2_LARGE_FILES, 5718 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5719 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5720 .create_lease_size = sizeof(struct create_lease_v2), 5721 }; 5722 5723 struct smb_version_values smb311_values = { 5724 .version_string = SMB311_VERSION_STRING, 5725 .protocol_id = SMB311_PROT_ID, 5726 .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, 5727 .large_lock_type = 0, 5728 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5729 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5730 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5731 .header_size = sizeof(struct smb2_hdr), 5732 .header_preamble_size = 0, 5733 .max_header_size = MAX_SMB2_HDR_SIZE, 5734 .read_rsp_size = sizeof(struct smb2_read_rsp), 5735 .lock_cmd = SMB2_LOCK, 5736 .cap_unix = 0, 5737 .cap_nt_find = SMB2_NT_FIND, 5738 .cap_large_files = SMB2_LARGE_FILES, 5739 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5740 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5741 .create_lease_size = sizeof(struct create_lease_v2), 5742 }; 5743