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