1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SMB2 version specific operations 4 * 5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #include <linux/pagemap.h> 9 #include <linux/vfs.h> 10 #include <linux/falloc.h> 11 #include <linux/scatterlist.h> 12 #include <linux/uuid.h> 13 #include <linux/sort.h> 14 #include <crypto/aead.h> 15 #include <linux/fiemap.h> 16 #include <uapi/linux/magic.h> 17 #include "cifsfs.h" 18 #include "cifsglob.h" 19 #include "smb2pdu.h" 20 #include "smb2proto.h" 21 #include "cifsproto.h" 22 #include "cifs_debug.h" 23 #include "cifs_unicode.h" 24 #include "smb2status.h" 25 #include "smb2glob.h" 26 #include "cifs_ioctl.h" 27 #include "smbdirect.h" 28 #include "fscache.h" 29 #include "fs_context.h" 30 #include "cached_dir.h" 31 32 /* Change credits for different ops and return the total number of credits */ 33 static int 34 change_conf(struct TCP_Server_Info *server) 35 { 36 server->credits += server->echo_credits + server->oplock_credits; 37 if (server->credits > server->max_credits) 38 server->credits = server->max_credits; 39 server->oplock_credits = server->echo_credits = 0; 40 switch (server->credits) { 41 case 0: 42 return 0; 43 case 1: 44 server->echoes = false; 45 server->oplocks = false; 46 break; 47 case 2: 48 server->echoes = true; 49 server->oplocks = false; 50 server->echo_credits = 1; 51 break; 52 default: 53 server->echoes = true; 54 if (enable_oplocks) { 55 server->oplocks = true; 56 server->oplock_credits = 1; 57 } else 58 server->oplocks = false; 59 60 server->echo_credits = 1; 61 } 62 server->credits -= server->echo_credits + server->oplock_credits; 63 return server->credits + server->echo_credits + server->oplock_credits; 64 } 65 66 static void 67 smb2_add_credits(struct TCP_Server_Info *server, 68 const struct cifs_credits *credits, const int optype) 69 { 70 int *val, rc = -1; 71 int scredits, in_flight; 72 unsigned int add = credits->value; 73 unsigned int instance = credits->instance; 74 bool reconnect_detected = false; 75 bool reconnect_with_invalid_credits = false; 76 77 spin_lock(&server->req_lock); 78 val = server->ops->get_credits_field(server, optype); 79 80 /* eg found case where write overlapping reconnect messed up credits */ 81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) 82 reconnect_with_invalid_credits = true; 83 84 if ((instance == 0) || (instance == server->reconnect_instance)) 85 *val += add; 86 else 87 reconnect_detected = true; 88 89 if (*val > 65000) { 90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ 91 pr_warn_once("server overflowed SMB3 credits\n"); 92 trace_smb3_overflow_credits(server->CurrentMid, 93 server->conn_id, server->hostname, *val, 94 add, server->in_flight); 95 } 96 WARN_ON_ONCE(server->in_flight == 0); 97 server->in_flight--; 98 if (server->in_flight == 0 && 99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && 100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) 101 rc = change_conf(server); 102 /* 103 * Sometimes server returns 0 credits on oplock break ack - we need to 104 * rebalance credits in this case. 105 */ 106 else if (server->in_flight > 0 && server->oplock_credits == 0 && 107 server->oplocks) { 108 if (server->credits > 1) { 109 server->credits--; 110 server->oplock_credits++; 111 } 112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && 113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) 114 /* if now have too many oplock credits, rebalance so don't starve normal ops */ 115 change_conf(server); 116 117 scredits = *val; 118 in_flight = server->in_flight; 119 spin_unlock(&server->req_lock); 120 wake_up(&server->request_q); 121 122 if (reconnect_detected) { 123 trace_smb3_reconnect_detected(server->CurrentMid, 124 server->conn_id, server->hostname, scredits, add, in_flight); 125 126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", 127 add, instance); 128 } 129 130 if (reconnect_with_invalid_credits) { 131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, 132 server->conn_id, server->hostname, scredits, add, in_flight); 133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", 134 optype, scredits, add); 135 } 136 137 spin_lock(&server->srv_lock); 138 if (server->tcpStatus == CifsNeedReconnect 139 || server->tcpStatus == CifsExiting) { 140 spin_unlock(&server->srv_lock); 141 return; 142 } 143 spin_unlock(&server->srv_lock); 144 145 switch (rc) { 146 case -1: 147 /* change_conf hasn't been executed */ 148 break; 149 case 0: 150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); 151 break; 152 case 1: 153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); 154 break; 155 case 2: 156 cifs_dbg(FYI, "disabling oplocks\n"); 157 break; 158 default: 159 /* change_conf rebalanced credits for different types */ 160 break; 161 } 162 163 trace_smb3_add_credits(server->CurrentMid, 164 server->conn_id, server->hostname, scredits, add, in_flight); 165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); 166 } 167 168 static void 169 smb2_set_credits(struct TCP_Server_Info *server, const int val) 170 { 171 int scredits, in_flight; 172 173 spin_lock(&server->req_lock); 174 server->credits = val; 175 if (val == 1) { 176 server->reconnect_instance++; 177 /* 178 * ChannelSequence updated for all channels in primary channel so that consistent 179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 180 */ 181 if (SERVER_IS_CHAN(server)) 182 server->primary_server->channel_sequence_num++; 183 else 184 server->channel_sequence_num++; 185 } 186 scredits = server->credits; 187 in_flight = server->in_flight; 188 spin_unlock(&server->req_lock); 189 190 trace_smb3_set_credits(server->CurrentMid, 191 server->conn_id, server->hostname, scredits, val, in_flight); 192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); 193 194 /* don't log while holding the lock */ 195 if (val == 1) 196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); 197 } 198 199 static int * 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) 201 { 202 switch (optype) { 203 case CIFS_ECHO_OP: 204 return &server->echo_credits; 205 case CIFS_OBREAK_OP: 206 return &server->oplock_credits; 207 default: 208 return &server->credits; 209 } 210 } 211 212 static unsigned int 213 smb2_get_credits(struct mid_q_entry *mid) 214 { 215 return mid->credits_received; 216 } 217 218 static int 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, 220 unsigned int *num, struct cifs_credits *credits) 221 { 222 int rc = 0; 223 unsigned int scredits, in_flight; 224 225 spin_lock(&server->req_lock); 226 while (1) { 227 spin_unlock(&server->req_lock); 228 229 spin_lock(&server->srv_lock); 230 if (server->tcpStatus == CifsExiting) { 231 spin_unlock(&server->srv_lock); 232 return -ENOENT; 233 } 234 spin_unlock(&server->srv_lock); 235 236 spin_lock(&server->req_lock); 237 if (server->credits <= 0) { 238 spin_unlock(&server->req_lock); 239 cifs_num_waiters_inc(server); 240 rc = wait_event_killable(server->request_q, 241 has_credits(server, &server->credits, 1)); 242 cifs_num_waiters_dec(server); 243 if (rc) 244 return rc; 245 spin_lock(&server->req_lock); 246 } else { 247 scredits = server->credits; 248 /* can deadlock with reopen */ 249 if (scredits <= 8) { 250 *num = SMB2_MAX_BUFFER_SIZE; 251 credits->value = 0; 252 credits->instance = 0; 253 break; 254 } 255 256 /* leave some credits for reopen and other ops */ 257 scredits -= 8; 258 *num = min_t(unsigned int, size, 259 scredits * SMB2_MAX_BUFFER_SIZE); 260 261 credits->value = 262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); 263 credits->instance = server->reconnect_instance; 264 server->credits -= credits->value; 265 server->in_flight++; 266 if (server->in_flight > server->max_in_flight) 267 server->max_in_flight = server->in_flight; 268 break; 269 } 270 } 271 scredits = server->credits; 272 in_flight = server->in_flight; 273 spin_unlock(&server->req_lock); 274 275 trace_smb3_wait_credits(server->CurrentMid, 276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight); 277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n", 278 __func__, credits->value, scredits); 279 280 return rc; 281 } 282 283 static int 284 smb2_adjust_credits(struct TCP_Server_Info *server, 285 struct cifs_credits *credits, 286 const unsigned int payload_size) 287 { 288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE); 289 int scredits, in_flight; 290 291 if (!credits->value || credits->value == new_val) 292 return 0; 293 294 if (credits->value < new_val) { 295 trace_smb3_too_many_credits(server->CurrentMid, 296 server->conn_id, server->hostname, 0, credits->value - new_val, 0); 297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)", 298 credits->value, new_val); 299 300 return -EOPNOTSUPP; 301 } 302 303 spin_lock(&server->req_lock); 304 305 if (server->reconnect_instance != credits->instance) { 306 scredits = server->credits; 307 in_flight = server->in_flight; 308 spin_unlock(&server->req_lock); 309 310 trace_smb3_reconnect_detected(server->CurrentMid, 311 server->conn_id, server->hostname, scredits, 312 credits->value - new_val, in_flight); 313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n", 314 credits->value - new_val); 315 return -EAGAIN; 316 } 317 318 server->credits += credits->value - new_val; 319 scredits = server->credits; 320 in_flight = server->in_flight; 321 spin_unlock(&server->req_lock); 322 wake_up(&server->request_q); 323 324 trace_smb3_adj_credits(server->CurrentMid, 325 server->conn_id, server->hostname, scredits, 326 credits->value - new_val, in_flight); 327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", 328 __func__, credits->value - new_val, scredits); 329 330 credits->value = new_val; 331 332 return 0; 333 } 334 335 static __u64 336 smb2_get_next_mid(struct TCP_Server_Info *server) 337 { 338 __u64 mid; 339 /* for SMB2 we need the current value */ 340 spin_lock(&server->mid_lock); 341 mid = server->CurrentMid++; 342 spin_unlock(&server->mid_lock); 343 return mid; 344 } 345 346 static void 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) 348 { 349 spin_lock(&server->mid_lock); 350 if (server->CurrentMid >= val) 351 server->CurrentMid -= val; 352 spin_unlock(&server->mid_lock); 353 } 354 355 static struct mid_q_entry * 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) 357 { 358 struct mid_q_entry *mid; 359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 360 __u64 wire_mid = le64_to_cpu(shdr->MessageId); 361 362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); 364 return NULL; 365 } 366 367 spin_lock(&server->mid_lock); 368 list_for_each_entry(mid, &server->pending_mid_q, qhead) { 369 if ((mid->mid == wire_mid) && 370 (mid->mid_state == MID_REQUEST_SUBMITTED) && 371 (mid->command == shdr->Command)) { 372 kref_get(&mid->refcount); 373 if (dequeue) { 374 list_del_init(&mid->qhead); 375 mid->mid_flags |= MID_DELETED; 376 } 377 spin_unlock(&server->mid_lock); 378 return mid; 379 } 380 } 381 spin_unlock(&server->mid_lock); 382 return NULL; 383 } 384 385 static struct mid_q_entry * 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf) 387 { 388 return __smb2_find_mid(server, buf, false); 389 } 390 391 static struct mid_q_entry * 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) 393 { 394 return __smb2_find_mid(server, buf, true); 395 } 396 397 static void 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server) 399 { 400 #ifdef CONFIG_CIFS_DEBUG2 401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 402 403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", 404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, 405 shdr->Id.SyncId.ProcessId); 406 if (!server->ops->check_message(buf, server->total_read, server)) { 407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, 408 server->ops->calc_smb_size(buf)); 409 } 410 #endif 411 } 412 413 static bool 414 smb2_need_neg(struct TCP_Server_Info *server) 415 { 416 return server->max_read == 0; 417 } 418 419 static int 420 smb2_negotiate(const unsigned int xid, 421 struct cifs_ses *ses, 422 struct TCP_Server_Info *server) 423 { 424 int rc; 425 426 spin_lock(&server->mid_lock); 427 server->CurrentMid = 0; 428 spin_unlock(&server->mid_lock); 429 rc = SMB2_negotiate(xid, ses, server); 430 /* BB we probably don't need to retry with modern servers */ 431 if (rc == -EAGAIN) 432 rc = -EHOSTDOWN; 433 return rc; 434 } 435 436 static unsigned int 437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 438 { 439 struct TCP_Server_Info *server = tcon->ses->server; 440 unsigned int wsize; 441 442 /* start with specified wsize, or default */ 443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; 444 wsize = min_t(unsigned int, wsize, server->max_write); 445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 447 448 return wsize; 449 } 450 451 static unsigned int 452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 453 { 454 struct TCP_Server_Info *server = tcon->ses->server; 455 unsigned int wsize; 456 457 /* start with specified wsize, or default */ 458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; 459 wsize = min_t(unsigned int, wsize, server->max_write); 460 #ifdef CONFIG_CIFS_SMB_DIRECT 461 if (server->rdma) { 462 if (server->sign) 463 /* 464 * Account for SMB2 data transfer packet header and 465 * possible encryption header 466 */ 467 wsize = min_t(unsigned int, 468 wsize, 469 server->smbd_conn->max_fragmented_send_size - 470 SMB2_READWRITE_PDU_HEADER_SIZE - 471 sizeof(struct smb2_transform_hdr)); 472 else 473 wsize = min_t(unsigned int, 474 wsize, server->smbd_conn->max_readwrite_size); 475 } 476 #endif 477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); 479 480 return wsize; 481 } 482 483 static unsigned int 484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 485 { 486 struct TCP_Server_Info *server = tcon->ses->server; 487 unsigned int rsize; 488 489 /* start with specified rsize, or default */ 490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; 491 rsize = min_t(unsigned int, rsize, server->max_read); 492 493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 495 496 return rsize; 497 } 498 499 static unsigned int 500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) 501 { 502 struct TCP_Server_Info *server = tcon->ses->server; 503 unsigned int rsize; 504 505 /* start with specified rsize, or default */ 506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; 507 rsize = min_t(unsigned int, rsize, server->max_read); 508 #ifdef CONFIG_CIFS_SMB_DIRECT 509 if (server->rdma) { 510 if (server->sign) 511 /* 512 * Account for SMB2 data transfer packet header and 513 * possible encryption header 514 */ 515 rsize = min_t(unsigned int, 516 rsize, 517 server->smbd_conn->max_fragmented_recv_size - 518 SMB2_READWRITE_PDU_HEADER_SIZE - 519 sizeof(struct smb2_transform_hdr)); 520 else 521 rsize = min_t(unsigned int, 522 rsize, server->smbd_conn->max_readwrite_size); 523 } 524 #endif 525 526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); 528 529 return rsize; 530 } 531 532 /* 533 * compare two interfaces a and b 534 * return 0 if everything matches. 535 * return 1 if a is rdma capable, or rss capable, or has higher link speed 536 * return -1 otherwise. 537 */ 538 static int 539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) 540 { 541 int cmp_ret = 0; 542 543 WARN_ON(!a || !b); 544 if (a->rdma_capable == b->rdma_capable) { 545 if (a->rss_capable == b->rss_capable) { 546 if (a->speed == b->speed) { 547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, 548 (struct sockaddr *) &b->sockaddr); 549 if (!cmp_ret) 550 return 0; 551 else if (cmp_ret > 0) 552 return 1; 553 else 554 return -1; 555 } else if (a->speed > b->speed) 556 return 1; 557 else 558 return -1; 559 } else if (a->rss_capable > b->rss_capable) 560 return 1; 561 else 562 return -1; 563 } else if (a->rdma_capable > b->rdma_capable) 564 return 1; 565 else 566 return -1; 567 } 568 569 static int 570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, 571 size_t buf_len, struct cifs_ses *ses, bool in_mount) 572 { 573 struct network_interface_info_ioctl_rsp *p; 574 struct sockaddr_in *addr4; 575 struct sockaddr_in6 *addr6; 576 struct iface_info_ipv4 *p4; 577 struct iface_info_ipv6 *p6; 578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; 579 struct cifs_server_iface tmp_iface; 580 ssize_t bytes_left; 581 size_t next = 0; 582 int nb_iface = 0; 583 int rc = 0, ret = 0; 584 585 bytes_left = buf_len; 586 p = buf; 587 588 spin_lock(&ses->iface_lock); 589 /* do not query too frequently, this time with lock held */ 590 if (ses->iface_last_update && 591 time_before(jiffies, ses->iface_last_update + 592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) { 593 spin_unlock(&ses->iface_lock); 594 return 0; 595 } 596 597 /* 598 * Go through iface_list and do kref_put to remove 599 * any unused ifaces. ifaces in use will be removed 600 * when the last user calls a kref_put on it 601 */ 602 list_for_each_entry_safe(iface, niface, &ses->iface_list, 603 iface_head) { 604 iface->is_active = 0; 605 kref_put(&iface->refcount, release_iface); 606 ses->iface_count--; 607 } 608 spin_unlock(&ses->iface_lock); 609 610 /* 611 * Samba server e.g. can return an empty interface list in some cases, 612 * which would only be a problem if we were requesting multichannel 613 */ 614 if (bytes_left == 0) { 615 /* avoid spamming logs every 10 minutes, so log only in mount */ 616 if ((ses->chan_max > 1) && in_mount) 617 cifs_dbg(VFS, 618 "multichannel not available\n" 619 "Empty network interface list returned by server %s\n", 620 ses->server->hostname); 621 rc = -EINVAL; 622 goto out; 623 } 624 625 while (bytes_left >= sizeof(*p)) { 626 memset(&tmp_iface, 0, sizeof(tmp_iface)); 627 tmp_iface.speed = le64_to_cpu(p->LinkSpeed); 628 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; 629 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; 630 631 switch (p->Family) { 632 /* 633 * The kernel and wire socket structures have the same 634 * layout and use network byte order but make the 635 * conversion explicit in case either one changes. 636 */ 637 case INTERNETWORK: 638 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; 639 p4 = (struct iface_info_ipv4 *)p->Buffer; 640 addr4->sin_family = AF_INET; 641 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); 642 643 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ 644 addr4->sin_port = cpu_to_be16(CIFS_PORT); 645 646 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, 647 &addr4->sin_addr); 648 break; 649 case INTERNETWORKV6: 650 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; 651 p6 = (struct iface_info_ipv6 *)p->Buffer; 652 addr6->sin6_family = AF_INET6; 653 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); 654 655 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ 656 addr6->sin6_flowinfo = 0; 657 addr6->sin6_scope_id = 0; 658 addr6->sin6_port = cpu_to_be16(CIFS_PORT); 659 660 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, 661 &addr6->sin6_addr); 662 break; 663 default: 664 cifs_dbg(VFS, 665 "%s: skipping unsupported socket family\n", 666 __func__); 667 goto next_iface; 668 } 669 670 /* 671 * The iface_list is assumed to be sorted by speed. 672 * Check if the new interface exists in that list. 673 * NEVER change iface. it could be in use. 674 * Add a new one instead 675 */ 676 spin_lock(&ses->iface_lock); 677 list_for_each_entry_safe(iface, niface, &ses->iface_list, 678 iface_head) { 679 ret = iface_cmp(iface, &tmp_iface); 680 if (!ret) { 681 /* just get a ref so that it doesn't get picked/freed */ 682 iface->is_active = 1; 683 kref_get(&iface->refcount); 684 ses->iface_count++; 685 spin_unlock(&ses->iface_lock); 686 goto next_iface; 687 } else if (ret < 0) { 688 /* all remaining ifaces are slower */ 689 kref_get(&iface->refcount); 690 break; 691 } 692 } 693 spin_unlock(&ses->iface_lock); 694 695 /* no match. insert the entry in the list */ 696 info = kmalloc(sizeof(struct cifs_server_iface), 697 GFP_KERNEL); 698 if (!info) { 699 rc = -ENOMEM; 700 goto out; 701 } 702 memcpy(info, &tmp_iface, sizeof(tmp_iface)); 703 704 /* add this new entry to the list */ 705 kref_init(&info->refcount); 706 info->is_active = 1; 707 708 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); 709 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); 710 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, 711 le32_to_cpu(p->Capability)); 712 713 spin_lock(&ses->iface_lock); 714 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { 715 list_add_tail(&info->iface_head, &iface->iface_head); 716 kref_put(&iface->refcount, release_iface); 717 } else 718 list_add_tail(&info->iface_head, &ses->iface_list); 719 720 ses->iface_count++; 721 spin_unlock(&ses->iface_lock); 722 ses->iface_last_update = jiffies; 723 next_iface: 724 nb_iface++; 725 next = le32_to_cpu(p->Next); 726 if (!next) { 727 bytes_left -= sizeof(*p); 728 break; 729 } 730 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); 731 bytes_left -= next; 732 } 733 734 if (!nb_iface) { 735 cifs_dbg(VFS, "%s: malformed interface info\n", __func__); 736 rc = -EINVAL; 737 goto out; 738 } 739 740 /* Azure rounds the buffer size up 8, to a 16 byte boundary */ 741 if ((bytes_left > 8) || p->Next) 742 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); 743 744 745 if (!ses->iface_count) { 746 rc = -EINVAL; 747 goto out; 748 } 749 750 out: 751 return rc; 752 } 753 754 int 755 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) 756 { 757 int rc; 758 unsigned int ret_data_len = 0; 759 struct network_interface_info_ioctl_rsp *out_buf = NULL; 760 struct cifs_ses *ses = tcon->ses; 761 struct TCP_Server_Info *pserver; 762 763 /* do not query too frequently */ 764 if (ses->iface_last_update && 765 time_before(jiffies, ses->iface_last_update + 766 (SMB_INTERFACE_POLL_INTERVAL * HZ))) 767 return 0; 768 769 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 770 FSCTL_QUERY_NETWORK_INTERFACE_INFO, 771 NULL /* no data input */, 0 /* no data input */, 772 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); 773 if (rc == -EOPNOTSUPP) { 774 cifs_dbg(FYI, 775 "server does not support query network interfaces\n"); 776 ret_data_len = 0; 777 } else if (rc != 0) { 778 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); 779 goto out; 780 } 781 782 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); 783 if (rc) 784 goto out; 785 786 /* check if iface is still active */ 787 pserver = ses->chans[0].server; 788 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) 789 cifs_chan_update_iface(ses, pserver); 790 791 out: 792 kfree(out_buf); 793 return rc; 794 } 795 796 static void 797 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 798 struct cifs_sb_info *cifs_sb) 799 { 800 int rc; 801 __le16 srch_path = 0; /* Null - open root of share */ 802 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 803 struct cifs_open_parms oparms; 804 struct cifs_fid fid; 805 struct cached_fid *cfid = NULL; 806 807 oparms = (struct cifs_open_parms) { 808 .tcon = tcon, 809 .path = "", 810 .desired_access = FILE_READ_ATTRIBUTES, 811 .disposition = FILE_OPEN, 812 .create_options = cifs_create_options(cifs_sb, 0), 813 .fid = &fid, 814 }; 815 816 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); 817 if (rc == 0) 818 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); 819 else 820 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 821 NULL, NULL); 822 if (rc) 823 return; 824 825 SMB3_request_interfaces(xid, tcon, true /* called during mount */); 826 827 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 828 FS_ATTRIBUTE_INFORMATION); 829 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 830 FS_DEVICE_INFORMATION); 831 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 832 FS_VOLUME_INFORMATION); 833 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 834 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ 835 if (cfid == NULL) 836 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 837 else 838 close_cached_dir(cfid); 839 } 840 841 static void 842 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, 843 struct cifs_sb_info *cifs_sb) 844 { 845 int rc; 846 __le16 srch_path = 0; /* Null - open root of share */ 847 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 848 struct cifs_open_parms oparms; 849 struct cifs_fid fid; 850 851 oparms = (struct cifs_open_parms) { 852 .tcon = tcon, 853 .path = "", 854 .desired_access = FILE_READ_ATTRIBUTES, 855 .disposition = FILE_OPEN, 856 .create_options = cifs_create_options(cifs_sb, 0), 857 .fid = &fid, 858 }; 859 860 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 861 NULL, NULL); 862 if (rc) 863 return; 864 865 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 866 FS_ATTRIBUTE_INFORMATION); 867 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, 868 FS_DEVICE_INFORMATION); 869 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 870 } 871 872 static int 873 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, 874 struct cifs_sb_info *cifs_sb, const char *full_path) 875 { 876 __le16 *utf16_path; 877 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 878 int err_buftype = CIFS_NO_BUFFER; 879 struct cifs_open_parms oparms; 880 struct kvec err_iov = {}; 881 struct cifs_fid fid; 882 struct cached_fid *cfid; 883 bool islink; 884 int rc, rc2; 885 886 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); 887 if (!rc) { 888 if (cfid->has_lease) { 889 close_cached_dir(cfid); 890 return 0; 891 } 892 close_cached_dir(cfid); 893 } 894 895 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 896 if (!utf16_path) 897 return -ENOMEM; 898 899 oparms = (struct cifs_open_parms) { 900 .tcon = tcon, 901 .path = full_path, 902 .desired_access = FILE_READ_ATTRIBUTES, 903 .disposition = FILE_OPEN, 904 .create_options = cifs_create_options(cifs_sb, 0), 905 .fid = &fid, 906 }; 907 908 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 909 &err_iov, &err_buftype); 910 if (rc) { 911 struct smb2_hdr *hdr = err_iov.iov_base; 912 913 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) 914 goto out; 915 916 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 917 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 918 full_path, &islink); 919 if (rc2) { 920 rc = rc2; 921 goto out; 922 } 923 if (islink) 924 rc = -EREMOTE; 925 } 926 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 927 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 928 rc = -EOPNOTSUPP; 929 goto out; 930 } 931 932 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 933 934 out: 935 free_rsp_buf(err_buftype, err_iov.iov_base); 936 kfree(utf16_path); 937 return rc; 938 } 939 940 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, 941 struct cifs_sb_info *cifs_sb, const char *full_path, 942 u64 *uniqueid, struct cifs_open_info_data *data) 943 { 944 *uniqueid = le64_to_cpu(data->fi.IndexNumber); 945 return 0; 946 } 947 948 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, 949 struct cifsFileInfo *cfile, struct cifs_open_info_data *data) 950 { 951 struct cifs_fid *fid = &cfile->fid; 952 953 if (cfile->symlink_target) { 954 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 955 if (!data->symlink_target) 956 return -ENOMEM; 957 } 958 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); 959 } 960 961 #ifdef CONFIG_CIFS_XATTR 962 static ssize_t 963 move_smb2_ea_to_cifs(char *dst, size_t dst_size, 964 struct smb2_file_full_ea_info *src, size_t src_size, 965 const unsigned char *ea_name) 966 { 967 int rc = 0; 968 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; 969 char *name, *value; 970 size_t buf_size = dst_size; 971 size_t name_len, value_len, user_name_len; 972 973 while (src_size > 0) { 974 name_len = (size_t)src->ea_name_length; 975 value_len = (size_t)le16_to_cpu(src->ea_value_length); 976 977 if (name_len == 0) 978 break; 979 980 if (src_size < 8 + name_len + 1 + value_len) { 981 cifs_dbg(FYI, "EA entry goes beyond length of list\n"); 982 rc = -EIO; 983 goto out; 984 } 985 986 name = &src->ea_data[0]; 987 value = &src->ea_data[src->ea_name_length + 1]; 988 989 if (ea_name) { 990 if (ea_name_len == name_len && 991 memcmp(ea_name, name, name_len) == 0) { 992 rc = value_len; 993 if (dst_size == 0) 994 goto out; 995 if (dst_size < value_len) { 996 rc = -ERANGE; 997 goto out; 998 } 999 memcpy(dst, value, value_len); 1000 goto out; 1001 } 1002 } else { 1003 /* 'user.' plus a terminating null */ 1004 user_name_len = 5 + 1 + name_len; 1005 1006 if (buf_size == 0) { 1007 /* skip copy - calc size only */ 1008 rc += user_name_len; 1009 } else if (dst_size >= user_name_len) { 1010 dst_size -= user_name_len; 1011 memcpy(dst, "user.", 5); 1012 dst += 5; 1013 memcpy(dst, src->ea_data, name_len); 1014 dst += name_len; 1015 *dst = 0; 1016 ++dst; 1017 rc += user_name_len; 1018 } else { 1019 /* stop before overrun buffer */ 1020 rc = -ERANGE; 1021 break; 1022 } 1023 } 1024 1025 if (!src->next_entry_offset) 1026 break; 1027 1028 if (src_size < le32_to_cpu(src->next_entry_offset)) { 1029 /* stop before overrun buffer */ 1030 rc = -ERANGE; 1031 break; 1032 } 1033 src_size -= le32_to_cpu(src->next_entry_offset); 1034 src = (void *)((char *)src + 1035 le32_to_cpu(src->next_entry_offset)); 1036 } 1037 1038 /* didn't find the named attribute */ 1039 if (ea_name) 1040 rc = -ENODATA; 1041 1042 out: 1043 return (ssize_t)rc; 1044 } 1045 1046 static ssize_t 1047 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, 1048 const unsigned char *path, const unsigned char *ea_name, 1049 char *ea_data, size_t buf_size, 1050 struct cifs_sb_info *cifs_sb) 1051 { 1052 int rc; 1053 struct kvec rsp_iov = {NULL, 0}; 1054 int buftype = CIFS_NO_BUFFER; 1055 struct smb2_query_info_rsp *rsp; 1056 struct smb2_file_full_ea_info *info = NULL; 1057 1058 rc = smb2_query_info_compound(xid, tcon, path, 1059 FILE_READ_EA, 1060 FILE_FULL_EA_INFORMATION, 1061 SMB2_O_INFO_FILE, 1062 CIFSMaxBufSize - 1063 MAX_SMB2_CREATE_RESPONSE_SIZE - 1064 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1065 &rsp_iov, &buftype, cifs_sb); 1066 if (rc) { 1067 /* 1068 * If ea_name is NULL (listxattr) and there are no EAs, 1069 * return 0 as it's not an error. Otherwise, the specified 1070 * ea_name was not found. 1071 */ 1072 if (!ea_name && rc == -ENODATA) 1073 rc = 0; 1074 goto qeas_exit; 1075 } 1076 1077 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 1078 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 1079 le32_to_cpu(rsp->OutputBufferLength), 1080 &rsp_iov, 1081 sizeof(struct smb2_file_full_ea_info)); 1082 if (rc) 1083 goto qeas_exit; 1084 1085 info = (struct smb2_file_full_ea_info *)( 1086 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 1087 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, 1088 le32_to_cpu(rsp->OutputBufferLength), ea_name); 1089 1090 qeas_exit: 1091 free_rsp_buf(buftype, rsp_iov.iov_base); 1092 return rc; 1093 } 1094 1095 static int 1096 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 1097 const char *path, const char *ea_name, const void *ea_value, 1098 const __u16 ea_value_len, const struct nls_table *nls_codepage, 1099 struct cifs_sb_info *cifs_sb) 1100 { 1101 struct smb2_compound_vars *vars; 1102 struct cifs_ses *ses = tcon->ses; 1103 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1104 struct smb_rqst *rqst; 1105 struct kvec *rsp_iov; 1106 __le16 *utf16_path = NULL; 1107 int ea_name_len = strlen(ea_name); 1108 int flags = CIFS_CP_CREATE_CLOSE_OP; 1109 int len; 1110 int resp_buftype[3]; 1111 struct cifs_open_parms oparms; 1112 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1113 struct cifs_fid fid; 1114 unsigned int size[1]; 1115 void *data[1]; 1116 struct smb2_file_full_ea_info *ea = NULL; 1117 struct smb2_query_info_rsp *rsp; 1118 int rc, used_len = 0; 1119 1120 if (smb3_encryption_required(tcon)) 1121 flags |= CIFS_TRANSFORM_REQ; 1122 1123 if (ea_name_len > 255) 1124 return -EINVAL; 1125 1126 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 1127 if (!utf16_path) 1128 return -ENOMEM; 1129 1130 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1131 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 1132 if (!vars) { 1133 rc = -ENOMEM; 1134 goto out_free_path; 1135 } 1136 rqst = vars->rqst; 1137 rsp_iov = vars->rsp_iov; 1138 1139 if (ses->server->ops->query_all_EAs) { 1140 if (!ea_value) { 1141 rc = ses->server->ops->query_all_EAs(xid, tcon, path, 1142 ea_name, NULL, 0, 1143 cifs_sb); 1144 if (rc == -ENODATA) 1145 goto sea_exit; 1146 } else { 1147 /* If we are adding a attribute we should first check 1148 * if there will be enough space available to store 1149 * the new EA. If not we should not add it since we 1150 * would not be able to even read the EAs back. 1151 */ 1152 rc = smb2_query_info_compound(xid, tcon, path, 1153 FILE_READ_EA, 1154 FILE_FULL_EA_INFORMATION, 1155 SMB2_O_INFO_FILE, 1156 CIFSMaxBufSize - 1157 MAX_SMB2_CREATE_RESPONSE_SIZE - 1158 MAX_SMB2_CLOSE_RESPONSE_SIZE, 1159 &rsp_iov[1], &resp_buftype[1], cifs_sb); 1160 if (rc == 0) { 1161 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1162 used_len = le32_to_cpu(rsp->OutputBufferLength); 1163 } 1164 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1165 resp_buftype[1] = CIFS_NO_BUFFER; 1166 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); 1167 rc = 0; 1168 1169 /* Use a fudge factor of 256 bytes in case we collide 1170 * with a different set_EAs command. 1171 */ 1172 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1173 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < 1174 used_len + ea_name_len + ea_value_len + 1) { 1175 rc = -ENOSPC; 1176 goto sea_exit; 1177 } 1178 } 1179 } 1180 1181 /* Open */ 1182 rqst[0].rq_iov = vars->open_iov; 1183 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1184 1185 oparms = (struct cifs_open_parms) { 1186 .tcon = tcon, 1187 .path = path, 1188 .desired_access = FILE_WRITE_EA, 1189 .disposition = FILE_OPEN, 1190 .create_options = cifs_create_options(cifs_sb, 0), 1191 .fid = &fid, 1192 }; 1193 1194 rc = SMB2_open_init(tcon, server, 1195 &rqst[0], &oplock, &oparms, utf16_path); 1196 if (rc) 1197 goto sea_exit; 1198 smb2_set_next_command(tcon, &rqst[0]); 1199 1200 1201 /* Set Info */ 1202 rqst[1].rq_iov = vars->si_iov; 1203 rqst[1].rq_nvec = 1; 1204 1205 len = sizeof(*ea) + ea_name_len + ea_value_len + 1; 1206 ea = kzalloc(len, GFP_KERNEL); 1207 if (ea == NULL) { 1208 rc = -ENOMEM; 1209 goto sea_exit; 1210 } 1211 1212 ea->ea_name_length = ea_name_len; 1213 ea->ea_value_length = cpu_to_le16(ea_value_len); 1214 memcpy(ea->ea_data, ea_name, ea_name_len + 1); 1215 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); 1216 1217 size[0] = len; 1218 data[0] = ea; 1219 1220 rc = SMB2_set_info_init(tcon, server, 1221 &rqst[1], COMPOUND_FID, 1222 COMPOUND_FID, current->tgid, 1223 FILE_FULL_EA_INFORMATION, 1224 SMB2_O_INFO_FILE, 0, data, size); 1225 if (rc) 1226 goto sea_exit; 1227 smb2_set_next_command(tcon, &rqst[1]); 1228 smb2_set_related(&rqst[1]); 1229 1230 /* Close */ 1231 rqst[2].rq_iov = &vars->close_iov; 1232 rqst[2].rq_nvec = 1; 1233 rc = SMB2_close_init(tcon, server, 1234 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1235 if (rc) 1236 goto sea_exit; 1237 smb2_set_related(&rqst[2]); 1238 1239 rc = compound_send_recv(xid, ses, server, 1240 flags, 3, rqst, 1241 resp_buftype, rsp_iov); 1242 /* no need to bump num_remote_opens because handle immediately closed */ 1243 1244 sea_exit: 1245 kfree(ea); 1246 SMB2_open_free(&rqst[0]); 1247 SMB2_set_info_free(&rqst[1]); 1248 SMB2_close_free(&rqst[2]); 1249 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1250 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1251 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1252 kfree(vars); 1253 out_free_path: 1254 kfree(utf16_path); 1255 return rc; 1256 } 1257 #endif 1258 1259 static bool 1260 smb2_can_echo(struct TCP_Server_Info *server) 1261 { 1262 return server->echoes; 1263 } 1264 1265 static void 1266 smb2_clear_stats(struct cifs_tcon *tcon) 1267 { 1268 int i; 1269 1270 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 1271 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); 1272 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); 1273 } 1274 } 1275 1276 static void 1277 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) 1278 { 1279 seq_puts(m, "\n\tShare Capabilities:"); 1280 if (tcon->capabilities & SMB2_SHARE_CAP_DFS) 1281 seq_puts(m, " DFS,"); 1282 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) 1283 seq_puts(m, " CONTINUOUS AVAILABILITY,"); 1284 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) 1285 seq_puts(m, " SCALEOUT,"); 1286 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) 1287 seq_puts(m, " CLUSTER,"); 1288 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) 1289 seq_puts(m, " ASYMMETRIC,"); 1290 if (tcon->capabilities == 0) 1291 seq_puts(m, " None"); 1292 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) 1293 seq_puts(m, " Aligned,"); 1294 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) 1295 seq_puts(m, " Partition Aligned,"); 1296 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) 1297 seq_puts(m, " SSD,"); 1298 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) 1299 seq_puts(m, " TRIM-support,"); 1300 1301 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); 1302 seq_printf(m, "\n\ttid: 0x%x", tcon->tid); 1303 if (tcon->perf_sector_size) 1304 seq_printf(m, "\tOptimal sector size: 0x%x", 1305 tcon->perf_sector_size); 1306 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); 1307 } 1308 1309 static void 1310 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 1311 { 1312 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; 1313 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; 1314 1315 /* 1316 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO 1317 * totals (requests sent) since those SMBs are per-session not per tcon 1318 */ 1319 seq_printf(m, "\nBytes read: %llu Bytes written: %llu", 1320 (long long)(tcon->bytes_read), 1321 (long long)(tcon->bytes_written)); 1322 seq_printf(m, "\nOpen files: %d total (local), %d open on server", 1323 atomic_read(&tcon->num_local_opens), 1324 atomic_read(&tcon->num_remote_opens)); 1325 seq_printf(m, "\nTreeConnects: %d total %d failed", 1326 atomic_read(&sent[SMB2_TREE_CONNECT_HE]), 1327 atomic_read(&failed[SMB2_TREE_CONNECT_HE])); 1328 seq_printf(m, "\nTreeDisconnects: %d total %d failed", 1329 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), 1330 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); 1331 seq_printf(m, "\nCreates: %d total %d failed", 1332 atomic_read(&sent[SMB2_CREATE_HE]), 1333 atomic_read(&failed[SMB2_CREATE_HE])); 1334 seq_printf(m, "\nCloses: %d total %d failed", 1335 atomic_read(&sent[SMB2_CLOSE_HE]), 1336 atomic_read(&failed[SMB2_CLOSE_HE])); 1337 seq_printf(m, "\nFlushes: %d total %d failed", 1338 atomic_read(&sent[SMB2_FLUSH_HE]), 1339 atomic_read(&failed[SMB2_FLUSH_HE])); 1340 seq_printf(m, "\nReads: %d total %d failed", 1341 atomic_read(&sent[SMB2_READ_HE]), 1342 atomic_read(&failed[SMB2_READ_HE])); 1343 seq_printf(m, "\nWrites: %d total %d failed", 1344 atomic_read(&sent[SMB2_WRITE_HE]), 1345 atomic_read(&failed[SMB2_WRITE_HE])); 1346 seq_printf(m, "\nLocks: %d total %d failed", 1347 atomic_read(&sent[SMB2_LOCK_HE]), 1348 atomic_read(&failed[SMB2_LOCK_HE])); 1349 seq_printf(m, "\nIOCTLs: %d total %d failed", 1350 atomic_read(&sent[SMB2_IOCTL_HE]), 1351 atomic_read(&failed[SMB2_IOCTL_HE])); 1352 seq_printf(m, "\nQueryDirectories: %d total %d failed", 1353 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), 1354 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); 1355 seq_printf(m, "\nChangeNotifies: %d total %d failed", 1356 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), 1357 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); 1358 seq_printf(m, "\nQueryInfos: %d total %d failed", 1359 atomic_read(&sent[SMB2_QUERY_INFO_HE]), 1360 atomic_read(&failed[SMB2_QUERY_INFO_HE])); 1361 seq_printf(m, "\nSetInfos: %d total %d failed", 1362 atomic_read(&sent[SMB2_SET_INFO_HE]), 1363 atomic_read(&failed[SMB2_SET_INFO_HE])); 1364 seq_printf(m, "\nOplockBreaks: %d sent %d failed", 1365 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), 1366 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); 1367 } 1368 1369 static void 1370 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) 1371 { 1372 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); 1373 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; 1374 1375 cfile->fid.persistent_fid = fid->persistent_fid; 1376 cfile->fid.volatile_fid = fid->volatile_fid; 1377 cfile->fid.access = fid->access; 1378 #ifdef CONFIG_CIFS_DEBUG2 1379 cfile->fid.mid = fid->mid; 1380 #endif /* CIFS_DEBUG2 */ 1381 server->ops->set_oplock_level(cinode, oplock, fid->epoch, 1382 &fid->purge_cache); 1383 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); 1384 memcpy(cfile->fid.create_guid, fid->create_guid, 16); 1385 } 1386 1387 static void 1388 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, 1389 struct cifs_fid *fid) 1390 { 1391 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1392 } 1393 1394 static void 1395 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, 1396 struct cifsFileInfo *cfile) 1397 { 1398 struct smb2_file_network_open_info file_inf; 1399 struct inode *inode; 1400 int rc; 1401 1402 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, 1403 cfile->fid.volatile_fid, &file_inf); 1404 if (rc) 1405 return; 1406 1407 inode = d_inode(cfile->dentry); 1408 1409 spin_lock(&inode->i_lock); 1410 CIFS_I(inode)->time = jiffies; 1411 1412 /* Creation time should not need to be updated on close */ 1413 if (file_inf.LastWriteTime) 1414 inode_set_mtime_to_ts(inode, 1415 cifs_NTtimeToUnix(file_inf.LastWriteTime)); 1416 if (file_inf.ChangeTime) 1417 inode_set_ctime_to_ts(inode, 1418 cifs_NTtimeToUnix(file_inf.ChangeTime)); 1419 if (file_inf.LastAccessTime) 1420 inode_set_atime_to_ts(inode, 1421 cifs_NTtimeToUnix(file_inf.LastAccessTime)); 1422 1423 /* 1424 * i_blocks is not related to (i_size / i_blksize), 1425 * but instead 512 byte (2**9) size is required for 1426 * calculating num blocks. 1427 */ 1428 if (le64_to_cpu(file_inf.AllocationSize) > 4096) 1429 inode->i_blocks = 1430 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; 1431 1432 /* End of file and Attributes should not have to be updated on close */ 1433 spin_unlock(&inode->i_lock); 1434 } 1435 1436 static int 1437 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, 1438 u64 persistent_fid, u64 volatile_fid, 1439 struct copychunk_ioctl *pcchunk) 1440 { 1441 int rc; 1442 unsigned int ret_data_len; 1443 struct resume_key_req *res_key; 1444 1445 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 1446 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, 1447 CIFSMaxBufSize, (char **)&res_key, &ret_data_len); 1448 1449 if (rc == -EOPNOTSUPP) { 1450 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); 1451 goto req_res_key_exit; 1452 } else if (rc) { 1453 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); 1454 goto req_res_key_exit; 1455 } 1456 if (ret_data_len < sizeof(struct resume_key_req)) { 1457 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); 1458 rc = -EINVAL; 1459 goto req_res_key_exit; 1460 } 1461 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); 1462 1463 req_res_key_exit: 1464 kfree(res_key); 1465 return rc; 1466 } 1467 1468 static int 1469 smb2_ioctl_query_info(const unsigned int xid, 1470 struct cifs_tcon *tcon, 1471 struct cifs_sb_info *cifs_sb, 1472 __le16 *path, int is_dir, 1473 unsigned long p) 1474 { 1475 struct smb2_compound_vars *vars; 1476 struct smb_rqst *rqst; 1477 struct kvec *rsp_iov; 1478 struct cifs_ses *ses = tcon->ses; 1479 struct TCP_Server_Info *server = cifs_pick_channel(ses); 1480 char __user *arg = (char __user *)p; 1481 struct smb_query_info qi; 1482 struct smb_query_info __user *pqi; 1483 int rc = 0; 1484 int flags = CIFS_CP_CREATE_CLOSE_OP; 1485 struct smb2_query_info_rsp *qi_rsp = NULL; 1486 struct smb2_ioctl_rsp *io_rsp = NULL; 1487 void *buffer = NULL; 1488 int resp_buftype[3]; 1489 struct cifs_open_parms oparms; 1490 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 1491 struct cifs_fid fid; 1492 unsigned int size[2]; 1493 void *data[2]; 1494 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; 1495 void (*free_req1_func)(struct smb_rqst *r); 1496 1497 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 1498 if (vars == NULL) 1499 return -ENOMEM; 1500 rqst = &vars->rqst[0]; 1501 rsp_iov = &vars->rsp_iov[0]; 1502 1503 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 1504 1505 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { 1506 rc = -EFAULT; 1507 goto free_vars; 1508 } 1509 if (qi.output_buffer_length > 1024) { 1510 rc = -EINVAL; 1511 goto free_vars; 1512 } 1513 1514 if (!ses || !server) { 1515 rc = -EIO; 1516 goto free_vars; 1517 } 1518 1519 if (smb3_encryption_required(tcon)) 1520 flags |= CIFS_TRANSFORM_REQ; 1521 1522 if (qi.output_buffer_length) { 1523 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); 1524 if (IS_ERR(buffer)) { 1525 rc = PTR_ERR(buffer); 1526 goto free_vars; 1527 } 1528 } 1529 1530 /* Open */ 1531 rqst[0].rq_iov = &vars->open_iov[0]; 1532 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 1533 1534 oparms = (struct cifs_open_parms) { 1535 .tcon = tcon, 1536 .disposition = FILE_OPEN, 1537 .create_options = cifs_create_options(cifs_sb, create_options), 1538 .fid = &fid, 1539 }; 1540 1541 if (qi.flags & PASSTHRU_FSCTL) { 1542 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { 1543 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: 1544 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; 1545 break; 1546 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: 1547 oparms.desired_access = GENERIC_ALL; 1548 break; 1549 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: 1550 oparms.desired_access = GENERIC_READ; 1551 break; 1552 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: 1553 oparms.desired_access = GENERIC_WRITE; 1554 break; 1555 } 1556 } else if (qi.flags & PASSTHRU_SET_INFO) { 1557 oparms.desired_access = GENERIC_WRITE; 1558 } else { 1559 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; 1560 } 1561 1562 rc = SMB2_open_init(tcon, server, 1563 &rqst[0], &oplock, &oparms, path); 1564 if (rc) 1565 goto free_output_buffer; 1566 smb2_set_next_command(tcon, &rqst[0]); 1567 1568 /* Query */ 1569 if (qi.flags & PASSTHRU_FSCTL) { 1570 /* Can eventually relax perm check since server enforces too */ 1571 if (!capable(CAP_SYS_ADMIN)) { 1572 rc = -EPERM; 1573 goto free_open_req; 1574 } 1575 rqst[1].rq_iov = &vars->io_iov[0]; 1576 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 1577 1578 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1579 qi.info_type, buffer, qi.output_buffer_length, 1580 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - 1581 MAX_SMB2_CLOSE_RESPONSE_SIZE); 1582 free_req1_func = SMB2_ioctl_free; 1583 } else if (qi.flags == PASSTHRU_SET_INFO) { 1584 /* Can eventually relax perm check since server enforces too */ 1585 if (!capable(CAP_SYS_ADMIN)) { 1586 rc = -EPERM; 1587 goto free_open_req; 1588 } 1589 if (qi.output_buffer_length < 8) { 1590 rc = -EINVAL; 1591 goto free_open_req; 1592 } 1593 rqst[1].rq_iov = vars->si_iov; 1594 rqst[1].rq_nvec = 1; 1595 1596 /* MS-FSCC 2.4.13 FileEndOfFileInformation */ 1597 size[0] = 8; 1598 data[0] = buffer; 1599 1600 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 1601 current->tgid, FILE_END_OF_FILE_INFORMATION, 1602 SMB2_O_INFO_FILE, 0, data, size); 1603 free_req1_func = SMB2_set_info_free; 1604 } else if (qi.flags == PASSTHRU_QUERY_INFO) { 1605 rqst[1].rq_iov = &vars->qi_iov; 1606 rqst[1].rq_nvec = 1; 1607 1608 rc = SMB2_query_info_init(tcon, server, 1609 &rqst[1], COMPOUND_FID, 1610 COMPOUND_FID, qi.file_info_class, 1611 qi.info_type, qi.additional_information, 1612 qi.input_buffer_length, 1613 qi.output_buffer_length, buffer); 1614 free_req1_func = SMB2_query_info_free; 1615 } else { /* unknown flags */ 1616 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", 1617 qi.flags); 1618 rc = -EINVAL; 1619 } 1620 1621 if (rc) 1622 goto free_open_req; 1623 smb2_set_next_command(tcon, &rqst[1]); 1624 smb2_set_related(&rqst[1]); 1625 1626 /* Close */ 1627 rqst[2].rq_iov = &vars->close_iov; 1628 rqst[2].rq_nvec = 1; 1629 1630 rc = SMB2_close_init(tcon, server, 1631 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 1632 if (rc) 1633 goto free_req_1; 1634 smb2_set_related(&rqst[2]); 1635 1636 rc = compound_send_recv(xid, ses, server, 1637 flags, 3, rqst, 1638 resp_buftype, rsp_iov); 1639 if (rc) 1640 goto out; 1641 1642 /* No need to bump num_remote_opens since handle immediately closed */ 1643 if (qi.flags & PASSTHRU_FSCTL) { 1644 pqi = (struct smb_query_info __user *)arg; 1645 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; 1646 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) 1647 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); 1648 if (qi.input_buffer_length > 0 && 1649 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length 1650 > rsp_iov[1].iov_len) { 1651 rc = -EFAULT; 1652 goto out; 1653 } 1654 1655 if (copy_to_user(&pqi->input_buffer_length, 1656 &qi.input_buffer_length, 1657 sizeof(qi.input_buffer_length))) { 1658 rc = -EFAULT; 1659 goto out; 1660 } 1661 1662 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), 1663 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), 1664 qi.input_buffer_length)) 1665 rc = -EFAULT; 1666 } else { 1667 pqi = (struct smb_query_info __user *)arg; 1668 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; 1669 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) 1670 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); 1671 if (copy_to_user(&pqi->input_buffer_length, 1672 &qi.input_buffer_length, 1673 sizeof(qi.input_buffer_length))) { 1674 rc = -EFAULT; 1675 goto out; 1676 } 1677 1678 if (copy_to_user(pqi + 1, qi_rsp->Buffer, 1679 qi.input_buffer_length)) 1680 rc = -EFAULT; 1681 } 1682 1683 out: 1684 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 1685 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 1686 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 1687 SMB2_close_free(&rqst[2]); 1688 free_req_1: 1689 free_req1_func(&rqst[1]); 1690 free_open_req: 1691 SMB2_open_free(&rqst[0]); 1692 free_output_buffer: 1693 kfree(buffer); 1694 free_vars: 1695 kfree(vars); 1696 return rc; 1697 } 1698 1699 static ssize_t 1700 smb2_copychunk_range(const unsigned int xid, 1701 struct cifsFileInfo *srcfile, 1702 struct cifsFileInfo *trgtfile, u64 src_off, 1703 u64 len, u64 dest_off) 1704 { 1705 int rc; 1706 unsigned int ret_data_len; 1707 struct copychunk_ioctl *pcchunk; 1708 struct copychunk_ioctl_rsp *retbuf = NULL; 1709 struct cifs_tcon *tcon; 1710 int chunks_copied = 0; 1711 bool chunk_sizes_updated = false; 1712 ssize_t bytes_written, total_bytes_written = 0; 1713 1714 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); 1715 if (pcchunk == NULL) 1716 return -ENOMEM; 1717 1718 cifs_dbg(FYI, "%s: about to call request res key\n", __func__); 1719 /* Request a key from the server to identify the source of the copy */ 1720 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), 1721 srcfile->fid.persistent_fid, 1722 srcfile->fid.volatile_fid, pcchunk); 1723 1724 /* Note: request_res_key sets res_key null only if rc !=0 */ 1725 if (rc) 1726 goto cchunk_out; 1727 1728 /* For now array only one chunk long, will make more flexible later */ 1729 pcchunk->ChunkCount = cpu_to_le32(1); 1730 pcchunk->Reserved = 0; 1731 pcchunk->Reserved2 = 0; 1732 1733 tcon = tlink_tcon(trgtfile->tlink); 1734 1735 while (len > 0) { 1736 pcchunk->SourceOffset = cpu_to_le64(src_off); 1737 pcchunk->TargetOffset = cpu_to_le64(dest_off); 1738 pcchunk->Length = 1739 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); 1740 1741 /* Request server copy to target from src identified by key */ 1742 kfree(retbuf); 1743 retbuf = NULL; 1744 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1745 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, 1746 (char *)pcchunk, sizeof(struct copychunk_ioctl), 1747 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); 1748 if (rc == 0) { 1749 if (ret_data_len != 1750 sizeof(struct copychunk_ioctl_rsp)) { 1751 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); 1752 rc = -EIO; 1753 goto cchunk_out; 1754 } 1755 if (retbuf->TotalBytesWritten == 0) { 1756 cifs_dbg(FYI, "no bytes copied\n"); 1757 rc = -EIO; 1758 goto cchunk_out; 1759 } 1760 /* 1761 * Check if server claimed to write more than we asked 1762 */ 1763 if (le32_to_cpu(retbuf->TotalBytesWritten) > 1764 le32_to_cpu(pcchunk->Length)) { 1765 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); 1766 rc = -EIO; 1767 goto cchunk_out; 1768 } 1769 if (le32_to_cpu(retbuf->ChunksWritten) != 1) { 1770 cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); 1771 rc = -EIO; 1772 goto cchunk_out; 1773 } 1774 chunks_copied++; 1775 1776 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); 1777 src_off += bytes_written; 1778 dest_off += bytes_written; 1779 len -= bytes_written; 1780 total_bytes_written += bytes_written; 1781 1782 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", 1783 le32_to_cpu(retbuf->ChunksWritten), 1784 le32_to_cpu(retbuf->ChunkBytesWritten), 1785 bytes_written); 1786 } else if (rc == -EINVAL) { 1787 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) 1788 goto cchunk_out; 1789 1790 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", 1791 le32_to_cpu(retbuf->ChunksWritten), 1792 le32_to_cpu(retbuf->ChunkBytesWritten), 1793 le32_to_cpu(retbuf->TotalBytesWritten)); 1794 1795 /* 1796 * Check if this is the first request using these sizes, 1797 * (ie check if copy succeed once with original sizes 1798 * and check if the server gave us different sizes after 1799 * we already updated max sizes on previous request). 1800 * if not then why is the server returning an error now 1801 */ 1802 if ((chunks_copied != 0) || chunk_sizes_updated) 1803 goto cchunk_out; 1804 1805 /* Check that server is not asking us to grow size */ 1806 if (le32_to_cpu(retbuf->ChunkBytesWritten) < 1807 tcon->max_bytes_chunk) 1808 tcon->max_bytes_chunk = 1809 le32_to_cpu(retbuf->ChunkBytesWritten); 1810 else 1811 goto cchunk_out; /* server gave us bogus size */ 1812 1813 /* No need to change MaxChunks since already set to 1 */ 1814 chunk_sizes_updated = true; 1815 } else 1816 goto cchunk_out; 1817 } 1818 1819 cchunk_out: 1820 kfree(pcchunk); 1821 kfree(retbuf); 1822 if (rc) 1823 return rc; 1824 else 1825 return total_bytes_written; 1826 } 1827 1828 static int 1829 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, 1830 struct cifs_fid *fid) 1831 { 1832 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); 1833 } 1834 1835 static unsigned int 1836 smb2_read_data_offset(char *buf) 1837 { 1838 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1839 1840 return rsp->DataOffset; 1841 } 1842 1843 static unsigned int 1844 smb2_read_data_length(char *buf, bool in_remaining) 1845 { 1846 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; 1847 1848 if (in_remaining) 1849 return le32_to_cpu(rsp->DataRemaining); 1850 1851 return le32_to_cpu(rsp->DataLength); 1852 } 1853 1854 1855 static int 1856 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, 1857 struct cifs_io_parms *parms, unsigned int *bytes_read, 1858 char **buf, int *buf_type) 1859 { 1860 parms->persistent_fid = pfid->persistent_fid; 1861 parms->volatile_fid = pfid->volatile_fid; 1862 return SMB2_read(xid, parms, bytes_read, buf, buf_type); 1863 } 1864 1865 static int 1866 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, 1867 struct cifs_io_parms *parms, unsigned int *written, 1868 struct kvec *iov, unsigned long nr_segs) 1869 { 1870 1871 parms->persistent_fid = pfid->persistent_fid; 1872 parms->volatile_fid = pfid->volatile_fid; 1873 return SMB2_write(xid, parms, written, iov, nr_segs); 1874 } 1875 1876 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ 1877 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, 1878 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) 1879 { 1880 struct cifsInodeInfo *cifsi; 1881 int rc; 1882 1883 cifsi = CIFS_I(inode); 1884 1885 /* if file already sparse don't bother setting sparse again */ 1886 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) 1887 return true; /* already sparse */ 1888 1889 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) 1890 return true; /* already not sparse */ 1891 1892 /* 1893 * Can't check for sparse support on share the usual way via the 1894 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share 1895 * since Samba server doesn't set the flag on the share, yet 1896 * supports the set sparse FSCTL and returns sparse correctly 1897 * in the file attributes. If we fail setting sparse though we 1898 * mark that server does not support sparse files for this share 1899 * to avoid repeatedly sending the unsupported fsctl to server 1900 * if the file is repeatedly extended. 1901 */ 1902 if (tcon->broken_sparse_sup) 1903 return false; 1904 1905 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 1906 cfile->fid.volatile_fid, FSCTL_SET_SPARSE, 1907 &setsparse, 1, CIFSMaxBufSize, NULL, NULL); 1908 if (rc) { 1909 tcon->broken_sparse_sup = true; 1910 cifs_dbg(FYI, "set sparse rc = %d\n", rc); 1911 return false; 1912 } 1913 1914 if (setsparse) 1915 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; 1916 else 1917 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); 1918 1919 return true; 1920 } 1921 1922 static int 1923 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, 1924 struct cifsFileInfo *cfile, __u64 size, bool set_alloc) 1925 { 1926 __le64 eof = cpu_to_le64(size); 1927 struct inode *inode; 1928 1929 /* 1930 * If extending file more than one page make sparse. Many Linux fs 1931 * make files sparse by default when extending via ftruncate 1932 */ 1933 inode = d_inode(cfile->dentry); 1934 1935 if (!set_alloc && (size > inode->i_size + 8192)) { 1936 __u8 set_sparse = 1; 1937 1938 /* whether set sparse succeeds or not, extend the file */ 1939 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); 1940 } 1941 1942 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 1943 cfile->fid.volatile_fid, cfile->pid, &eof); 1944 } 1945 1946 static int 1947 smb2_duplicate_extents(const unsigned int xid, 1948 struct cifsFileInfo *srcfile, 1949 struct cifsFileInfo *trgtfile, u64 src_off, 1950 u64 len, u64 dest_off) 1951 { 1952 int rc; 1953 unsigned int ret_data_len; 1954 struct inode *inode; 1955 struct duplicate_extents_to_file dup_ext_buf; 1956 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); 1957 1958 /* server fileays advertise duplicate extent support with this flag */ 1959 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & 1960 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) 1961 return -EOPNOTSUPP; 1962 1963 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; 1964 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; 1965 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); 1966 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); 1967 dup_ext_buf.ByteCount = cpu_to_le64(len); 1968 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", 1969 src_off, dest_off, len); 1970 1971 inode = d_inode(trgtfile->dentry); 1972 if (inode->i_size < dest_off + len) { 1973 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); 1974 if (rc) 1975 goto duplicate_extents_out; 1976 1977 /* 1978 * Although also could set plausible allocation size (i_blocks) 1979 * here in addition to setting the file size, in reflink 1980 * it is likely that the target file is sparse. Its allocation 1981 * size will be queried on next revalidate, but it is important 1982 * to make sure that file's cached size is updated immediately 1983 */ 1984 cifs_setsize(inode, dest_off + len); 1985 } 1986 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, 1987 trgtfile->fid.volatile_fid, 1988 FSCTL_DUPLICATE_EXTENTS_TO_FILE, 1989 (char *)&dup_ext_buf, 1990 sizeof(struct duplicate_extents_to_file), 1991 CIFSMaxBufSize, NULL, 1992 &ret_data_len); 1993 1994 if (ret_data_len > 0) 1995 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); 1996 1997 duplicate_extents_out: 1998 return rc; 1999 } 2000 2001 static int 2002 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 2003 struct cifsFileInfo *cfile) 2004 { 2005 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, 2006 cfile->fid.volatile_fid); 2007 } 2008 2009 static int 2010 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, 2011 struct cifsFileInfo *cfile) 2012 { 2013 struct fsctl_set_integrity_information_req integr_info; 2014 unsigned int ret_data_len; 2015 2016 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); 2017 integr_info.Flags = 0; 2018 integr_info.Reserved = 0; 2019 2020 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2021 cfile->fid.volatile_fid, 2022 FSCTL_SET_INTEGRITY_INFORMATION, 2023 (char *)&integr_info, 2024 sizeof(struct fsctl_set_integrity_information_req), 2025 CIFSMaxBufSize, NULL, 2026 &ret_data_len); 2027 2028 } 2029 2030 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ 2031 #define GMT_TOKEN_SIZE 50 2032 2033 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ 2034 2035 /* 2036 * Input buffer contains (empty) struct smb_snapshot array with size filled in 2037 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 2038 */ 2039 static int 2040 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, 2041 struct cifsFileInfo *cfile, void __user *ioc_buf) 2042 { 2043 char *retbuf = NULL; 2044 unsigned int ret_data_len = 0; 2045 int rc; 2046 u32 max_response_size; 2047 struct smb_snapshot_array snapshot_in; 2048 2049 /* 2050 * On the first query to enumerate the list of snapshots available 2051 * for this volume the buffer begins with 0 (number of snapshots 2052 * which can be returned is zero since at that point we do not know 2053 * how big the buffer needs to be). On the second query, 2054 * it (ret_data_len) is set to number of snapshots so we can 2055 * know to set the maximum response size larger (see below). 2056 */ 2057 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) 2058 return -EFAULT; 2059 2060 /* 2061 * Note that for snapshot queries that servers like Azure expect that 2062 * the first query be minimal size (and just used to get the number/size 2063 * of previous versions) so response size must be specified as EXACTLY 2064 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 2065 * of eight bytes. 2066 */ 2067 if (ret_data_len == 0) 2068 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; 2069 else 2070 max_response_size = CIFSMaxBufSize; 2071 2072 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 2073 cfile->fid.volatile_fid, 2074 FSCTL_SRV_ENUMERATE_SNAPSHOTS, 2075 NULL, 0 /* no input data */, max_response_size, 2076 (char **)&retbuf, 2077 &ret_data_len); 2078 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", 2079 rc, ret_data_len); 2080 if (rc) 2081 return rc; 2082 2083 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { 2084 /* Fixup buffer */ 2085 if (copy_from_user(&snapshot_in, ioc_buf, 2086 sizeof(struct smb_snapshot_array))) { 2087 rc = -EFAULT; 2088 kfree(retbuf); 2089 return rc; 2090 } 2091 2092 /* 2093 * Check for min size, ie not large enough to fit even one GMT 2094 * token (snapshot). On the first ioctl some users may pass in 2095 * smaller size (or zero) to simply get the size of the array 2096 * so the user space caller can allocate sufficient memory 2097 * and retry the ioctl again with larger array size sufficient 2098 * to hold all of the snapshot GMT tokens on the second try. 2099 */ 2100 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) 2101 ret_data_len = sizeof(struct smb_snapshot_array); 2102 2103 /* 2104 * We return struct SRV_SNAPSHOT_ARRAY, followed by 2105 * the snapshot array (of 50 byte GMT tokens) each 2106 * representing an available previous version of the data 2107 */ 2108 if (ret_data_len > (snapshot_in.snapshot_array_size + 2109 sizeof(struct smb_snapshot_array))) 2110 ret_data_len = snapshot_in.snapshot_array_size + 2111 sizeof(struct smb_snapshot_array); 2112 2113 if (copy_to_user(ioc_buf, retbuf, ret_data_len)) 2114 rc = -EFAULT; 2115 } 2116 2117 kfree(retbuf); 2118 return rc; 2119 } 2120 2121 2122 2123 static int 2124 smb3_notify(const unsigned int xid, struct file *pfile, 2125 void __user *ioc_buf, bool return_changes) 2126 { 2127 struct smb3_notify_info notify; 2128 struct smb3_notify_info __user *pnotify_buf; 2129 struct dentry *dentry = pfile->f_path.dentry; 2130 struct inode *inode = file_inode(pfile); 2131 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 2132 struct cifs_open_parms oparms; 2133 struct cifs_fid fid; 2134 struct cifs_tcon *tcon; 2135 const unsigned char *path; 2136 char *returned_ioctl_info = NULL; 2137 void *page = alloc_dentry_path(); 2138 __le16 *utf16_path = NULL; 2139 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2140 int rc = 0; 2141 __u32 ret_len = 0; 2142 2143 path = build_path_from_dentry(dentry, page); 2144 if (IS_ERR(path)) { 2145 rc = PTR_ERR(path); 2146 goto notify_exit; 2147 } 2148 2149 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2150 if (utf16_path == NULL) { 2151 rc = -ENOMEM; 2152 goto notify_exit; 2153 } 2154 2155 if (return_changes) { 2156 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { 2157 rc = -EFAULT; 2158 goto notify_exit; 2159 } 2160 } else { 2161 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { 2162 rc = -EFAULT; 2163 goto notify_exit; 2164 } 2165 notify.data_len = 0; 2166 } 2167 2168 tcon = cifs_sb_master_tcon(cifs_sb); 2169 oparms = (struct cifs_open_parms) { 2170 .tcon = tcon, 2171 .path = path, 2172 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2173 .disposition = FILE_OPEN, 2174 .create_options = cifs_create_options(cifs_sb, 0), 2175 .fid = &fid, 2176 }; 2177 2178 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 2179 NULL); 2180 if (rc) 2181 goto notify_exit; 2182 2183 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, 2184 notify.watch_tree, notify.completion_filter, 2185 notify.data_len, &returned_ioctl_info, &ret_len); 2186 2187 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2188 2189 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); 2190 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { 2191 if (ret_len > notify.data_len) 2192 ret_len = notify.data_len; 2193 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; 2194 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) 2195 rc = -EFAULT; 2196 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) 2197 rc = -EFAULT; 2198 } 2199 kfree(returned_ioctl_info); 2200 notify_exit: 2201 free_dentry_path(page); 2202 kfree(utf16_path); 2203 return rc; 2204 } 2205 2206 static int 2207 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, 2208 const char *path, struct cifs_sb_info *cifs_sb, 2209 struct cifs_fid *fid, __u16 search_flags, 2210 struct cifs_search_info *srch_inf) 2211 { 2212 __le16 *utf16_path; 2213 struct smb_rqst rqst[2]; 2214 struct kvec rsp_iov[2]; 2215 int resp_buftype[2]; 2216 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 2217 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 2218 int rc, flags = 0; 2219 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2220 struct cifs_open_parms oparms; 2221 struct smb2_query_directory_rsp *qd_rsp = NULL; 2222 struct smb2_create_rsp *op_rsp = NULL; 2223 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 2224 int retry_count = 0; 2225 2226 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2227 if (!utf16_path) 2228 return -ENOMEM; 2229 2230 if (smb3_encryption_required(tcon)) 2231 flags |= CIFS_TRANSFORM_REQ; 2232 2233 memset(rqst, 0, sizeof(rqst)); 2234 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; 2235 memset(rsp_iov, 0, sizeof(rsp_iov)); 2236 2237 /* Open */ 2238 memset(&open_iov, 0, sizeof(open_iov)); 2239 rqst[0].rq_iov = open_iov; 2240 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2241 2242 oparms = (struct cifs_open_parms) { 2243 .tcon = tcon, 2244 .path = path, 2245 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, 2246 .disposition = FILE_OPEN, 2247 .create_options = cifs_create_options(cifs_sb, 0), 2248 .fid = fid, 2249 }; 2250 2251 rc = SMB2_open_init(tcon, server, 2252 &rqst[0], &oplock, &oparms, utf16_path); 2253 if (rc) 2254 goto qdf_free; 2255 smb2_set_next_command(tcon, &rqst[0]); 2256 2257 /* Query directory */ 2258 srch_inf->entries_in_buffer = 0; 2259 srch_inf->index_of_last_entry = 2; 2260 2261 memset(&qd_iov, 0, sizeof(qd_iov)); 2262 rqst[1].rq_iov = qd_iov; 2263 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 2264 2265 rc = SMB2_query_directory_init(xid, tcon, server, 2266 &rqst[1], 2267 COMPOUND_FID, COMPOUND_FID, 2268 0, srch_inf->info_level); 2269 if (rc) 2270 goto qdf_free; 2271 2272 smb2_set_related(&rqst[1]); 2273 2274 again: 2275 rc = compound_send_recv(xid, tcon->ses, server, 2276 flags, 2, rqst, 2277 resp_buftype, rsp_iov); 2278 2279 if (rc == -EAGAIN && retry_count++ < 10) 2280 goto again; 2281 2282 /* If the open failed there is nothing to do */ 2283 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; 2284 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { 2285 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); 2286 goto qdf_free; 2287 } 2288 fid->persistent_fid = op_rsp->PersistentFileId; 2289 fid->volatile_fid = op_rsp->VolatileFileId; 2290 2291 /* Anything else than ENODATA means a genuine error */ 2292 if (rc && rc != -ENODATA) { 2293 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2294 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); 2295 trace_smb3_query_dir_err(xid, fid->persistent_fid, 2296 tcon->tid, tcon->ses->Suid, 0, 0, rc); 2297 goto qdf_free; 2298 } 2299 2300 atomic_inc(&tcon->num_remote_opens); 2301 2302 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; 2303 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { 2304 trace_smb3_query_dir_done(xid, fid->persistent_fid, 2305 tcon->tid, tcon->ses->Suid, 0, 0); 2306 srch_inf->endOfSearch = true; 2307 rc = 0; 2308 goto qdf_free; 2309 } 2310 2311 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], 2312 srch_inf); 2313 if (rc) { 2314 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, 2315 tcon->ses->Suid, 0, 0, rc); 2316 goto qdf_free; 2317 } 2318 resp_buftype[1] = CIFS_NO_BUFFER; 2319 2320 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, 2321 tcon->ses->Suid, 0, srch_inf->entries_in_buffer); 2322 2323 qdf_free: 2324 kfree(utf16_path); 2325 SMB2_open_free(&rqst[0]); 2326 SMB2_query_directory_free(&rqst[1]); 2327 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2328 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2329 return rc; 2330 } 2331 2332 static int 2333 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, 2334 struct cifs_fid *fid, __u16 search_flags, 2335 struct cifs_search_info *srch_inf) 2336 { 2337 return SMB2_query_directory(xid, tcon, fid->persistent_fid, 2338 fid->volatile_fid, 0, srch_inf); 2339 } 2340 2341 static int 2342 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, 2343 struct cifs_fid *fid) 2344 { 2345 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); 2346 } 2347 2348 /* 2349 * If we negotiate SMB2 protocol and get STATUS_PENDING - update 2350 * the number of credits and return true. Otherwise - return false. 2351 */ 2352 static bool 2353 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) 2354 { 2355 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2356 int scredits, in_flight; 2357 2358 if (shdr->Status != STATUS_PENDING) 2359 return false; 2360 2361 if (shdr->CreditRequest) { 2362 spin_lock(&server->req_lock); 2363 server->credits += le16_to_cpu(shdr->CreditRequest); 2364 scredits = server->credits; 2365 in_flight = server->in_flight; 2366 spin_unlock(&server->req_lock); 2367 wake_up(&server->request_q); 2368 2369 trace_smb3_pend_credits(server->CurrentMid, 2370 server->conn_id, server->hostname, scredits, 2371 le16_to_cpu(shdr->CreditRequest), in_flight); 2372 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", 2373 __func__, le16_to_cpu(shdr->CreditRequest), scredits); 2374 } 2375 2376 return true; 2377 } 2378 2379 static bool 2380 smb2_is_session_expired(char *buf) 2381 { 2382 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2383 2384 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && 2385 shdr->Status != STATUS_USER_SESSION_DELETED) 2386 return false; 2387 2388 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), 2389 le64_to_cpu(shdr->SessionId), 2390 le16_to_cpu(shdr->Command), 2391 le64_to_cpu(shdr->MessageId)); 2392 cifs_dbg(FYI, "Session expired or deleted\n"); 2393 2394 return true; 2395 } 2396 2397 static bool 2398 smb2_is_status_io_timeout(char *buf) 2399 { 2400 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2401 2402 if (shdr->Status == STATUS_IO_TIMEOUT) 2403 return true; 2404 else 2405 return false; 2406 } 2407 2408 static bool 2409 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 2410 { 2411 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 2412 struct TCP_Server_Info *pserver; 2413 struct cifs_ses *ses; 2414 struct cifs_tcon *tcon; 2415 2416 if (shdr->Status != STATUS_NETWORK_NAME_DELETED) 2417 return false; 2418 2419 /* If server is a channel, select the primary channel */ 2420 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 2421 2422 spin_lock(&cifs_tcp_ses_lock); 2423 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 2424 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 2425 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { 2426 spin_lock(&tcon->tc_lock); 2427 tcon->need_reconnect = true; 2428 spin_unlock(&tcon->tc_lock); 2429 spin_unlock(&cifs_tcp_ses_lock); 2430 pr_warn_once("Server share %s deleted.\n", 2431 tcon->tree_name); 2432 return true; 2433 } 2434 } 2435 } 2436 spin_unlock(&cifs_tcp_ses_lock); 2437 2438 return false; 2439 } 2440 2441 static int 2442 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, 2443 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) 2444 { 2445 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) 2446 return SMB2_lease_break(0, tcon, cinode->lease_key, 2447 smb2_get_lease_state(cinode)); 2448 2449 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, 2450 CIFS_CACHE_READ(cinode) ? 1 : 0); 2451 } 2452 2453 void 2454 smb2_set_related(struct smb_rqst *rqst) 2455 { 2456 struct smb2_hdr *shdr; 2457 2458 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2459 if (shdr == NULL) { 2460 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); 2461 return; 2462 } 2463 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 2464 } 2465 2466 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; 2467 2468 void 2469 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) 2470 { 2471 struct smb2_hdr *shdr; 2472 struct cifs_ses *ses = tcon->ses; 2473 struct TCP_Server_Info *server = ses->server; 2474 unsigned long len = smb_rqst_len(server, rqst); 2475 int i, num_padding; 2476 2477 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); 2478 if (shdr == NULL) { 2479 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); 2480 return; 2481 } 2482 2483 /* SMB headers in a compound are 8 byte aligned. */ 2484 2485 /* No padding needed */ 2486 if (!(len & 7)) 2487 goto finished; 2488 2489 num_padding = 8 - (len & 7); 2490 if (!smb3_encryption_required(tcon)) { 2491 /* 2492 * If we do not have encryption then we can just add an extra 2493 * iov for the padding. 2494 */ 2495 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; 2496 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; 2497 rqst->rq_nvec++; 2498 len += num_padding; 2499 } else { 2500 /* 2501 * We can not add a small padding iov for the encryption case 2502 * because the encryption framework can not handle the padding 2503 * iovs. 2504 * We have to flatten this into a single buffer and add 2505 * the padding to it. 2506 */ 2507 for (i = 1; i < rqst->rq_nvec; i++) { 2508 memcpy(rqst->rq_iov[0].iov_base + 2509 rqst->rq_iov[0].iov_len, 2510 rqst->rq_iov[i].iov_base, 2511 rqst->rq_iov[i].iov_len); 2512 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; 2513 } 2514 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 2515 0, num_padding); 2516 rqst->rq_iov[0].iov_len += num_padding; 2517 len += num_padding; 2518 rqst->rq_nvec = 1; 2519 } 2520 2521 finished: 2522 shdr->NextCommand = cpu_to_le32(len); 2523 } 2524 2525 /* 2526 * Passes the query info response back to the caller on success. 2527 * Caller need to free this with free_rsp_buf(). 2528 */ 2529 int 2530 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, 2531 const char *path, u32 desired_access, 2532 u32 class, u32 type, u32 output_len, 2533 struct kvec *rsp, int *buftype, 2534 struct cifs_sb_info *cifs_sb) 2535 { 2536 struct smb2_compound_vars *vars; 2537 struct cifs_ses *ses = tcon->ses; 2538 struct TCP_Server_Info *server = cifs_pick_channel(ses); 2539 int flags = CIFS_CP_CREATE_CLOSE_OP; 2540 struct smb_rqst *rqst; 2541 int resp_buftype[3]; 2542 struct kvec *rsp_iov; 2543 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2544 struct cifs_open_parms oparms; 2545 struct cifs_fid fid; 2546 int rc; 2547 __le16 *utf16_path; 2548 struct cached_fid *cfid = NULL; 2549 2550 if (!path) 2551 path = ""; 2552 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 2553 if (!utf16_path) 2554 return -ENOMEM; 2555 2556 if (smb3_encryption_required(tcon)) 2557 flags |= CIFS_TRANSFORM_REQ; 2558 2559 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 2560 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 2561 if (!vars) { 2562 rc = -ENOMEM; 2563 goto out_free_path; 2564 } 2565 rqst = vars->rqst; 2566 rsp_iov = vars->rsp_iov; 2567 2568 /* 2569 * We can only call this for things we know are directories. 2570 */ 2571 if (!strcmp(path, "")) 2572 open_cached_dir(xid, tcon, path, cifs_sb, false, 2573 &cfid); /* cfid null if open dir failed */ 2574 2575 rqst[0].rq_iov = vars->open_iov; 2576 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 2577 2578 oparms = (struct cifs_open_parms) { 2579 .tcon = tcon, 2580 .path = path, 2581 .desired_access = desired_access, 2582 .disposition = FILE_OPEN, 2583 .create_options = cifs_create_options(cifs_sb, 0), 2584 .fid = &fid, 2585 }; 2586 2587 rc = SMB2_open_init(tcon, server, 2588 &rqst[0], &oplock, &oparms, utf16_path); 2589 if (rc) 2590 goto qic_exit; 2591 smb2_set_next_command(tcon, &rqst[0]); 2592 2593 rqst[1].rq_iov = &vars->qi_iov; 2594 rqst[1].rq_nvec = 1; 2595 2596 if (cfid) { 2597 rc = SMB2_query_info_init(tcon, server, 2598 &rqst[1], 2599 cfid->fid.persistent_fid, 2600 cfid->fid.volatile_fid, 2601 class, type, 0, 2602 output_len, 0, 2603 NULL); 2604 } else { 2605 rc = SMB2_query_info_init(tcon, server, 2606 &rqst[1], 2607 COMPOUND_FID, 2608 COMPOUND_FID, 2609 class, type, 0, 2610 output_len, 0, 2611 NULL); 2612 } 2613 if (rc) 2614 goto qic_exit; 2615 if (!cfid) { 2616 smb2_set_next_command(tcon, &rqst[1]); 2617 smb2_set_related(&rqst[1]); 2618 } 2619 2620 rqst[2].rq_iov = &vars->close_iov; 2621 rqst[2].rq_nvec = 1; 2622 2623 rc = SMB2_close_init(tcon, server, 2624 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 2625 if (rc) 2626 goto qic_exit; 2627 smb2_set_related(&rqst[2]); 2628 2629 if (cfid) { 2630 rc = compound_send_recv(xid, ses, server, 2631 flags, 1, &rqst[1], 2632 &resp_buftype[1], &rsp_iov[1]); 2633 } else { 2634 rc = compound_send_recv(xid, ses, server, 2635 flags, 3, rqst, 2636 resp_buftype, rsp_iov); 2637 } 2638 if (rc) { 2639 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 2640 if (rc == -EREMCHG) { 2641 tcon->need_reconnect = true; 2642 pr_warn_once("server share %s deleted\n", 2643 tcon->tree_name); 2644 } 2645 goto qic_exit; 2646 } 2647 *rsp = rsp_iov[1]; 2648 *buftype = resp_buftype[1]; 2649 2650 qic_exit: 2651 SMB2_open_free(&rqst[0]); 2652 SMB2_query_info_free(&rqst[1]); 2653 SMB2_close_free(&rqst[2]); 2654 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 2655 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 2656 if (cfid) 2657 close_cached_dir(cfid); 2658 kfree(vars); 2659 out_free_path: 2660 kfree(utf16_path); 2661 return rc; 2662 } 2663 2664 static int 2665 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2666 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2667 { 2668 struct smb2_query_info_rsp *rsp; 2669 struct smb2_fs_full_size_info *info = NULL; 2670 struct kvec rsp_iov = {NULL, 0}; 2671 int buftype = CIFS_NO_BUFFER; 2672 int rc; 2673 2674 2675 rc = smb2_query_info_compound(xid, tcon, "", 2676 FILE_READ_ATTRIBUTES, 2677 FS_FULL_SIZE_INFORMATION, 2678 SMB2_O_INFO_FILESYSTEM, 2679 sizeof(struct smb2_fs_full_size_info), 2680 &rsp_iov, &buftype, cifs_sb); 2681 if (rc) 2682 goto qfs_exit; 2683 2684 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 2685 buf->f_type = SMB2_SUPER_MAGIC; 2686 info = (struct smb2_fs_full_size_info *)( 2687 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 2688 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 2689 le32_to_cpu(rsp->OutputBufferLength), 2690 &rsp_iov, 2691 sizeof(struct smb2_fs_full_size_info)); 2692 if (!rc) 2693 smb2_copy_fs_info_to_kstatfs(info, buf); 2694 2695 qfs_exit: 2696 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); 2697 free_rsp_buf(buftype, rsp_iov.iov_base); 2698 return rc; 2699 } 2700 2701 static int 2702 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, 2703 struct cifs_sb_info *cifs_sb, struct kstatfs *buf) 2704 { 2705 int rc; 2706 __le16 srch_path = 0; /* Null - open root of share */ 2707 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2708 struct cifs_open_parms oparms; 2709 struct cifs_fid fid; 2710 2711 if (!tcon->posix_extensions) 2712 return smb2_queryfs(xid, tcon, cifs_sb, buf); 2713 2714 oparms = (struct cifs_open_parms) { 2715 .tcon = tcon, 2716 .path = "", 2717 .desired_access = FILE_READ_ATTRIBUTES, 2718 .disposition = FILE_OPEN, 2719 .create_options = cifs_create_options(cifs_sb, 0), 2720 .fid = &fid, 2721 }; 2722 2723 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, 2724 NULL, NULL); 2725 if (rc) 2726 return rc; 2727 2728 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, 2729 fid.volatile_fid, buf); 2730 buf->f_type = SMB2_SUPER_MAGIC; 2731 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 2732 return rc; 2733 } 2734 2735 static bool 2736 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) 2737 { 2738 return ob1->fid.persistent_fid == ob2->fid.persistent_fid && 2739 ob1->fid.volatile_fid == ob2->fid.volatile_fid; 2740 } 2741 2742 static int 2743 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, 2744 __u64 length, __u32 type, int lock, int unlock, bool wait) 2745 { 2746 if (unlock && !lock) 2747 type = SMB2_LOCKFLAG_UNLOCK; 2748 return SMB2_lock(xid, tlink_tcon(cfile->tlink), 2749 cfile->fid.persistent_fid, cfile->fid.volatile_fid, 2750 current->tgid, length, offset, type, wait); 2751 } 2752 2753 static void 2754 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) 2755 { 2756 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); 2757 } 2758 2759 static void 2760 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) 2761 { 2762 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); 2763 } 2764 2765 static void 2766 smb2_new_lease_key(struct cifs_fid *fid) 2767 { 2768 generate_random_uuid(fid->lease_key); 2769 } 2770 2771 static int 2772 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, 2773 const char *search_name, 2774 struct dfs_info3_param **target_nodes, 2775 unsigned int *num_of_nodes, 2776 const struct nls_table *nls_codepage, int remap) 2777 { 2778 int rc; 2779 __le16 *utf16_path = NULL; 2780 int utf16_path_len = 0; 2781 struct cifs_tcon *tcon; 2782 struct fsctl_get_dfs_referral_req *dfs_req = NULL; 2783 struct get_dfs_referral_rsp *dfs_rsp = NULL; 2784 u32 dfs_req_size = 0, dfs_rsp_size = 0; 2785 int retry_count = 0; 2786 2787 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); 2788 2789 /* 2790 * Try to use the IPC tcon, otherwise just use any 2791 */ 2792 tcon = ses->tcon_ipc; 2793 if (tcon == NULL) { 2794 spin_lock(&cifs_tcp_ses_lock); 2795 tcon = list_first_entry_or_null(&ses->tcon_list, 2796 struct cifs_tcon, 2797 tcon_list); 2798 if (tcon) 2799 tcon->tc_count++; 2800 spin_unlock(&cifs_tcp_ses_lock); 2801 } 2802 2803 if (tcon == NULL) { 2804 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", 2805 ses); 2806 rc = -ENOTCONN; 2807 goto out; 2808 } 2809 2810 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, 2811 &utf16_path_len, 2812 nls_codepage, remap); 2813 if (!utf16_path) { 2814 rc = -ENOMEM; 2815 goto out; 2816 } 2817 2818 dfs_req_size = sizeof(*dfs_req) + utf16_path_len; 2819 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); 2820 if (!dfs_req) { 2821 rc = -ENOMEM; 2822 goto out; 2823 } 2824 2825 /* Highest DFS referral version understood */ 2826 dfs_req->MaxReferralLevel = DFS_VERSION; 2827 2828 /* Path to resolve in an UTF-16 null-terminated string */ 2829 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); 2830 2831 do { 2832 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 2833 FSCTL_DFS_GET_REFERRALS, 2834 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, 2835 (char **)&dfs_rsp, &dfs_rsp_size); 2836 if (!is_retryable_error(rc)) 2837 break; 2838 usleep_range(512, 2048); 2839 } while (++retry_count < 5); 2840 2841 if (!rc && !dfs_rsp) 2842 rc = -EIO; 2843 if (rc) { 2844 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) 2845 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); 2846 goto out; 2847 } 2848 2849 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, 2850 num_of_nodes, target_nodes, 2851 nls_codepage, remap, search_name, 2852 true /* is_unicode */); 2853 if (rc) { 2854 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); 2855 goto out; 2856 } 2857 2858 out: 2859 if (tcon && !tcon->ipc) { 2860 /* ipc tcons are not refcounted */ 2861 spin_lock(&cifs_tcp_ses_lock); 2862 tcon->tc_count--; 2863 /* tc_count can never go negative */ 2864 WARN_ON(tcon->tc_count < 0); 2865 spin_unlock(&cifs_tcp_ses_lock); 2866 } 2867 kfree(utf16_path); 2868 kfree(dfs_req); 2869 kfree(dfs_rsp); 2870 return rc; 2871 } 2872 2873 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */ 2874 static int parse_reparse_posix(struct reparse_posix_data *buf, 2875 struct cifs_sb_info *cifs_sb, 2876 struct cifs_open_info_data *data) 2877 { 2878 unsigned int len; 2879 u64 type; 2880 2881 switch ((type = le64_to_cpu(buf->InodeType))) { 2882 case NFS_SPECFILE_LNK: 2883 len = le16_to_cpu(buf->ReparseDataLength); 2884 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer, 2885 len, true, 2886 cifs_sb->local_nls); 2887 if (!data->symlink_target) 2888 return -ENOMEM; 2889 convert_delimiter(data->symlink_target, '/'); 2890 cifs_dbg(FYI, "%s: target path: %s\n", 2891 __func__, data->symlink_target); 2892 break; 2893 case NFS_SPECFILE_CHR: 2894 case NFS_SPECFILE_BLK: 2895 case NFS_SPECFILE_FIFO: 2896 case NFS_SPECFILE_SOCK: 2897 break; 2898 default: 2899 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n", 2900 __func__, type); 2901 return -EOPNOTSUPP; 2902 } 2903 return 0; 2904 } 2905 2906 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym, 2907 u32 plen, bool unicode, 2908 struct cifs_sb_info *cifs_sb, 2909 struct cifs_open_info_data *data) 2910 { 2911 unsigned int len; 2912 unsigned int offs; 2913 2914 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */ 2915 2916 offs = le16_to_cpu(sym->SubstituteNameOffset); 2917 len = le16_to_cpu(sym->SubstituteNameLength); 2918 if (offs + 20 > plen || offs + len + 20 > plen) { 2919 cifs_dbg(VFS, "srv returned malformed symlink buffer\n"); 2920 return -EIO; 2921 } 2922 2923 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs, 2924 len, unicode, 2925 cifs_sb->local_nls); 2926 if (!data->symlink_target) 2927 return -ENOMEM; 2928 2929 convert_delimiter(data->symlink_target, '/'); 2930 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target); 2931 2932 return 0; 2933 } 2934 2935 int parse_reparse_point(struct reparse_data_buffer *buf, 2936 u32 plen, struct cifs_sb_info *cifs_sb, 2937 bool unicode, struct cifs_open_info_data *data) 2938 { 2939 if (plen < sizeof(*buf)) { 2940 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n", 2941 __func__, plen); 2942 return -EIO; 2943 } 2944 2945 if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) { 2946 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n", 2947 __func__, plen); 2948 return -EIO; 2949 } 2950 2951 data->reparse.buf = buf; 2952 2953 /* See MS-FSCC 2.1.2 */ 2954 switch (le32_to_cpu(buf->ReparseTag)) { 2955 case IO_REPARSE_TAG_NFS: 2956 return parse_reparse_posix((struct reparse_posix_data *)buf, 2957 cifs_sb, data); 2958 case IO_REPARSE_TAG_SYMLINK: 2959 return parse_reparse_symlink( 2960 (struct reparse_symlink_data_buffer *)buf, 2961 plen, unicode, cifs_sb, data); 2962 case IO_REPARSE_TAG_LX_SYMLINK: 2963 case IO_REPARSE_TAG_AF_UNIX: 2964 case IO_REPARSE_TAG_LX_FIFO: 2965 case IO_REPARSE_TAG_LX_CHR: 2966 case IO_REPARSE_TAG_LX_BLK: 2967 return 0; 2968 default: 2969 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n", 2970 __func__, le32_to_cpu(buf->ReparseTag)); 2971 return -EOPNOTSUPP; 2972 } 2973 } 2974 2975 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb, 2976 struct kvec *rsp_iov, 2977 struct cifs_open_info_data *data) 2978 { 2979 struct reparse_data_buffer *buf; 2980 struct smb2_ioctl_rsp *io = rsp_iov->iov_base; 2981 u32 plen = le32_to_cpu(io->OutputCount); 2982 2983 buf = (struct reparse_data_buffer *)((u8 *)io + 2984 le32_to_cpu(io->OutputOffset)); 2985 return parse_reparse_point(buf, plen, cifs_sb, true, data); 2986 } 2987 2988 static int smb2_query_reparse_point(const unsigned int xid, 2989 struct cifs_tcon *tcon, 2990 struct cifs_sb_info *cifs_sb, 2991 const char *full_path, 2992 u32 *tag, struct kvec *rsp, 2993 int *rsp_buftype) 2994 { 2995 struct smb2_compound_vars *vars; 2996 int rc; 2997 __le16 *utf16_path = NULL; 2998 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 2999 struct cifs_open_parms oparms; 3000 struct cifs_fid fid; 3001 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 3002 int flags = CIFS_CP_CREATE_CLOSE_OP; 3003 struct smb_rqst *rqst; 3004 int resp_buftype[3]; 3005 struct kvec *rsp_iov; 3006 struct smb2_ioctl_rsp *ioctl_rsp; 3007 struct reparse_data_buffer *reparse_buf; 3008 u32 off, count, len; 3009 3010 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 3011 3012 if (smb3_encryption_required(tcon)) 3013 flags |= CIFS_TRANSFORM_REQ; 3014 3015 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 3016 if (!utf16_path) 3017 return -ENOMEM; 3018 3019 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 3020 vars = kzalloc(sizeof(*vars), GFP_KERNEL); 3021 if (!vars) { 3022 rc = -ENOMEM; 3023 goto out_free_path; 3024 } 3025 rqst = vars->rqst; 3026 rsp_iov = vars->rsp_iov; 3027 3028 /* 3029 * setup smb2open - TODO add optimization to call cifs_get_readable_path 3030 * to see if there is a handle already open that we can use 3031 */ 3032 rqst[0].rq_iov = vars->open_iov; 3033 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; 3034 3035 oparms = (struct cifs_open_parms) { 3036 .tcon = tcon, 3037 .path = full_path, 3038 .desired_access = FILE_READ_ATTRIBUTES, 3039 .disposition = FILE_OPEN, 3040 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT), 3041 .fid = &fid, 3042 }; 3043 3044 rc = SMB2_open_init(tcon, server, 3045 &rqst[0], &oplock, &oparms, utf16_path); 3046 if (rc) 3047 goto query_rp_exit; 3048 smb2_set_next_command(tcon, &rqst[0]); 3049 3050 3051 /* IOCTL */ 3052 rqst[1].rq_iov = vars->io_iov; 3053 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; 3054 3055 rc = SMB2_ioctl_init(tcon, server, 3056 &rqst[1], COMPOUND_FID, 3057 COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0, 3058 CIFSMaxBufSize - 3059 MAX_SMB2_CREATE_RESPONSE_SIZE - 3060 MAX_SMB2_CLOSE_RESPONSE_SIZE); 3061 if (rc) 3062 goto query_rp_exit; 3063 3064 smb2_set_next_command(tcon, &rqst[1]); 3065 smb2_set_related(&rqst[1]); 3066 3067 /* Close */ 3068 rqst[2].rq_iov = &vars->close_iov; 3069 rqst[2].rq_nvec = 1; 3070 3071 rc = SMB2_close_init(tcon, server, 3072 &rqst[2], COMPOUND_FID, COMPOUND_FID, false); 3073 if (rc) 3074 goto query_rp_exit; 3075 3076 smb2_set_related(&rqst[2]); 3077 3078 rc = compound_send_recv(xid, tcon->ses, server, 3079 flags, 3, rqst, 3080 resp_buftype, rsp_iov); 3081 3082 ioctl_rsp = rsp_iov[1].iov_base; 3083 3084 /* 3085 * Open was successful and we got an ioctl response. 3086 */ 3087 if (rc == 0) { 3088 /* See MS-FSCC 2.3.23 */ 3089 off = le32_to_cpu(ioctl_rsp->OutputOffset); 3090 count = le32_to_cpu(ioctl_rsp->OutputCount); 3091 if (check_add_overflow(off, count, &len) || 3092 len > rsp_iov[1].iov_len) { 3093 cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n", 3094 __func__, off, count); 3095 rc = -EIO; 3096 goto query_rp_exit; 3097 } 3098 3099 reparse_buf = (void *)((u8 *)ioctl_rsp + off); 3100 len = sizeof(*reparse_buf); 3101 if (count < len || 3102 count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) { 3103 cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n", 3104 __func__, off, count); 3105 rc = -EIO; 3106 goto query_rp_exit; 3107 } 3108 *tag = le32_to_cpu(reparse_buf->ReparseTag); 3109 *rsp = rsp_iov[1]; 3110 *rsp_buftype = resp_buftype[1]; 3111 resp_buftype[1] = CIFS_NO_BUFFER; 3112 } 3113 3114 query_rp_exit: 3115 SMB2_open_free(&rqst[0]); 3116 SMB2_ioctl_free(&rqst[1]); 3117 SMB2_close_free(&rqst[2]); 3118 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 3119 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 3120 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 3121 kfree(vars); 3122 out_free_path: 3123 kfree(utf16_path); 3124 return rc; 3125 } 3126 3127 static struct cifs_ntsd * 3128 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, 3129 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) 3130 { 3131 struct cifs_ntsd *pntsd = NULL; 3132 unsigned int xid; 3133 int rc = -EOPNOTSUPP; 3134 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3135 3136 if (IS_ERR(tlink)) 3137 return ERR_CAST(tlink); 3138 3139 xid = get_xid(); 3140 cifs_dbg(FYI, "trying to get acl\n"); 3141 3142 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, 3143 cifsfid->volatile_fid, (void **)&pntsd, pacllen, 3144 info); 3145 free_xid(xid); 3146 3147 cifs_put_tlink(tlink); 3148 3149 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3150 if (rc) 3151 return ERR_PTR(rc); 3152 return pntsd; 3153 3154 } 3155 3156 static struct cifs_ntsd * 3157 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, 3158 const char *path, u32 *pacllen, u32 info) 3159 { 3160 struct cifs_ntsd *pntsd = NULL; 3161 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3162 unsigned int xid; 3163 int rc; 3164 struct cifs_tcon *tcon; 3165 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3166 struct cifs_fid fid; 3167 struct cifs_open_parms oparms; 3168 __le16 *utf16_path; 3169 3170 cifs_dbg(FYI, "get smb3 acl for path %s\n", path); 3171 if (IS_ERR(tlink)) 3172 return ERR_CAST(tlink); 3173 3174 tcon = tlink_tcon(tlink); 3175 xid = get_xid(); 3176 3177 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3178 if (!utf16_path) { 3179 rc = -ENOMEM; 3180 free_xid(xid); 3181 return ERR_PTR(rc); 3182 } 3183 3184 oparms = (struct cifs_open_parms) { 3185 .tcon = tcon, 3186 .path = path, 3187 .desired_access = READ_CONTROL, 3188 .disposition = FILE_OPEN, 3189 /* 3190 * When querying an ACL, even if the file is a symlink 3191 * we want to open the source not the target, and so 3192 * the protocol requires that the client specify this 3193 * flag when opening a reparse point 3194 */ 3195 .create_options = cifs_create_options(cifs_sb, 0) | 3196 OPEN_REPARSE_POINT, 3197 .fid = &fid, 3198 }; 3199 3200 if (info & SACL_SECINFO) 3201 oparms.desired_access |= SYSTEM_SECURITY; 3202 3203 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, 3204 NULL); 3205 kfree(utf16_path); 3206 if (!rc) { 3207 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3208 fid.volatile_fid, (void **)&pntsd, pacllen, 3209 info); 3210 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3211 } 3212 3213 cifs_put_tlink(tlink); 3214 free_xid(xid); 3215 3216 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); 3217 if (rc) 3218 return ERR_PTR(rc); 3219 return pntsd; 3220 } 3221 3222 static int 3223 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, 3224 struct inode *inode, const char *path, int aclflag) 3225 { 3226 u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 3227 unsigned int xid; 3228 int rc, access_flags = 0; 3229 struct cifs_tcon *tcon; 3230 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 3231 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); 3232 struct cifs_fid fid; 3233 struct cifs_open_parms oparms; 3234 __le16 *utf16_path; 3235 3236 cifs_dbg(FYI, "set smb3 acl for path %s\n", path); 3237 if (IS_ERR(tlink)) 3238 return PTR_ERR(tlink); 3239 3240 tcon = tlink_tcon(tlink); 3241 xid = get_xid(); 3242 3243 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) 3244 access_flags |= WRITE_OWNER; 3245 if (aclflag & CIFS_ACL_SACL) 3246 access_flags |= SYSTEM_SECURITY; 3247 if (aclflag & CIFS_ACL_DACL) 3248 access_flags |= WRITE_DAC; 3249 3250 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); 3251 if (!utf16_path) { 3252 rc = -ENOMEM; 3253 free_xid(xid); 3254 return rc; 3255 } 3256 3257 oparms = (struct cifs_open_parms) { 3258 .tcon = tcon, 3259 .desired_access = access_flags, 3260 .create_options = cifs_create_options(cifs_sb, 0), 3261 .disposition = FILE_OPEN, 3262 .path = path, 3263 .fid = &fid, 3264 }; 3265 3266 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, 3267 NULL, NULL); 3268 kfree(utf16_path); 3269 if (!rc) { 3270 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, 3271 fid.volatile_fid, pnntsd, acllen, aclflag); 3272 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 3273 } 3274 3275 cifs_put_tlink(tlink); 3276 free_xid(xid); 3277 return rc; 3278 } 3279 3280 /* Retrieve an ACL from the server */ 3281 static struct cifs_ntsd * 3282 get_smb2_acl(struct cifs_sb_info *cifs_sb, 3283 struct inode *inode, const char *path, 3284 u32 *pacllen, u32 info) 3285 { 3286 struct cifs_ntsd *pntsd = NULL; 3287 struct cifsFileInfo *open_file = NULL; 3288 3289 if (inode && !(info & SACL_SECINFO)) 3290 open_file = find_readable_file(CIFS_I(inode), true); 3291 if (!open_file || (info & SACL_SECINFO)) 3292 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); 3293 3294 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); 3295 cifsFileInfo_put(open_file); 3296 return pntsd; 3297 } 3298 3299 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, 3300 loff_t offset, loff_t len, unsigned int xid) 3301 { 3302 struct cifsFileInfo *cfile = file->private_data; 3303 struct file_zero_data_information fsctl_buf; 3304 3305 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3306 3307 fsctl_buf.FileOffset = cpu_to_le64(offset); 3308 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3309 3310 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3311 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3312 (char *)&fsctl_buf, 3313 sizeof(struct file_zero_data_information), 3314 0, NULL, NULL); 3315 } 3316 3317 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, 3318 loff_t offset, loff_t len, bool keep_size) 3319 { 3320 struct cifs_ses *ses = tcon->ses; 3321 struct inode *inode = file_inode(file); 3322 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3323 struct cifsFileInfo *cfile = file->private_data; 3324 unsigned long long new_size; 3325 long rc; 3326 unsigned int xid; 3327 __le64 eof; 3328 3329 xid = get_xid(); 3330 3331 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3332 ses->Suid, offset, len); 3333 3334 inode_lock(inode); 3335 filemap_invalidate_lock(inode->i_mapping); 3336 3337 /* 3338 * We zero the range through ioctl, so we need remove the page caches 3339 * first, otherwise the data may be inconsistent with the server. 3340 */ 3341 truncate_pagecache_range(inode, offset, offset + len - 1); 3342 3343 /* if file not oplocked can't be sure whether asking to extend size */ 3344 rc = -EOPNOTSUPP; 3345 if (keep_size == false && !CIFS_CACHE_READ(cifsi)) 3346 goto zero_range_exit; 3347 3348 rc = smb3_zero_data(file, tcon, offset, len, xid); 3349 if (rc < 0) 3350 goto zero_range_exit; 3351 3352 /* 3353 * do we also need to change the size of the file? 3354 */ 3355 new_size = offset + len; 3356 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { 3357 eof = cpu_to_le64(new_size); 3358 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3359 cfile->fid.volatile_fid, cfile->pid, &eof); 3360 if (rc >= 0) { 3361 truncate_setsize(inode, new_size); 3362 fscache_resize_cookie(cifs_inode_cookie(inode), new_size); 3363 } 3364 } 3365 3366 zero_range_exit: 3367 filemap_invalidate_unlock(inode->i_mapping); 3368 inode_unlock(inode); 3369 free_xid(xid); 3370 if (rc) 3371 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, 3372 ses->Suid, offset, len, rc); 3373 else 3374 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, 3375 ses->Suid, offset, len); 3376 return rc; 3377 } 3378 3379 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, 3380 loff_t offset, loff_t len) 3381 { 3382 struct inode *inode = file_inode(file); 3383 struct cifsFileInfo *cfile = file->private_data; 3384 struct file_zero_data_information fsctl_buf; 3385 long rc; 3386 unsigned int xid; 3387 __u8 set_sparse = 1; 3388 3389 xid = get_xid(); 3390 3391 inode_lock(inode); 3392 /* Need to make file sparse, if not already, before freeing range. */ 3393 /* Consider adding equivalent for compressed since it could also work */ 3394 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { 3395 rc = -EOPNOTSUPP; 3396 goto out; 3397 } 3398 3399 filemap_invalidate_lock(inode->i_mapping); 3400 /* 3401 * We implement the punch hole through ioctl, so we need remove the page 3402 * caches first, otherwise the data may be inconsistent with the server. 3403 */ 3404 truncate_pagecache_range(inode, offset, offset + len - 1); 3405 3406 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); 3407 3408 fsctl_buf.FileOffset = cpu_to_le64(offset); 3409 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); 3410 3411 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3412 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, 3413 (char *)&fsctl_buf, 3414 sizeof(struct file_zero_data_information), 3415 CIFSMaxBufSize, NULL, NULL); 3416 filemap_invalidate_unlock(inode->i_mapping); 3417 out: 3418 inode_unlock(inode); 3419 free_xid(xid); 3420 return rc; 3421 } 3422 3423 static int smb3_simple_fallocate_write_range(unsigned int xid, 3424 struct cifs_tcon *tcon, 3425 struct cifsFileInfo *cfile, 3426 loff_t off, loff_t len, 3427 char *buf) 3428 { 3429 struct cifs_io_parms io_parms = {0}; 3430 int nbytes; 3431 int rc = 0; 3432 struct kvec iov[2]; 3433 3434 io_parms.netfid = cfile->fid.netfid; 3435 io_parms.pid = current->tgid; 3436 io_parms.tcon = tcon; 3437 io_parms.persistent_fid = cfile->fid.persistent_fid; 3438 io_parms.volatile_fid = cfile->fid.volatile_fid; 3439 3440 while (len) { 3441 io_parms.offset = off; 3442 io_parms.length = len; 3443 if (io_parms.length > SMB2_MAX_BUFFER_SIZE) 3444 io_parms.length = SMB2_MAX_BUFFER_SIZE; 3445 /* iov[0] is reserved for smb header */ 3446 iov[1].iov_base = buf; 3447 iov[1].iov_len = io_parms.length; 3448 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); 3449 if (rc) 3450 break; 3451 if (nbytes > len) 3452 return -EINVAL; 3453 buf += nbytes; 3454 off += nbytes; 3455 len -= nbytes; 3456 } 3457 return rc; 3458 } 3459 3460 static int smb3_simple_fallocate_range(unsigned int xid, 3461 struct cifs_tcon *tcon, 3462 struct cifsFileInfo *cfile, 3463 loff_t off, loff_t len) 3464 { 3465 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; 3466 u32 out_data_len; 3467 char *buf = NULL; 3468 loff_t l; 3469 int rc; 3470 3471 in_data.file_offset = cpu_to_le64(off); 3472 in_data.length = cpu_to_le64(len); 3473 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3474 cfile->fid.volatile_fid, 3475 FSCTL_QUERY_ALLOCATED_RANGES, 3476 (char *)&in_data, sizeof(in_data), 3477 1024 * sizeof(struct file_allocated_range_buffer), 3478 (char **)&out_data, &out_data_len); 3479 if (rc) 3480 goto out; 3481 3482 buf = kzalloc(1024 * 1024, GFP_KERNEL); 3483 if (buf == NULL) { 3484 rc = -ENOMEM; 3485 goto out; 3486 } 3487 3488 tmp_data = out_data; 3489 while (len) { 3490 /* 3491 * The rest of the region is unmapped so write it all. 3492 */ 3493 if (out_data_len == 0) { 3494 rc = smb3_simple_fallocate_write_range(xid, tcon, 3495 cfile, off, len, buf); 3496 goto out; 3497 } 3498 3499 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3500 rc = -EINVAL; 3501 goto out; 3502 } 3503 3504 if (off < le64_to_cpu(tmp_data->file_offset)) { 3505 /* 3506 * We are at a hole. Write until the end of the region 3507 * or until the next allocated data, 3508 * whichever comes next. 3509 */ 3510 l = le64_to_cpu(tmp_data->file_offset) - off; 3511 if (len < l) 3512 l = len; 3513 rc = smb3_simple_fallocate_write_range(xid, tcon, 3514 cfile, off, l, buf); 3515 if (rc) 3516 goto out; 3517 off = off + l; 3518 len = len - l; 3519 if (len == 0) 3520 goto out; 3521 } 3522 /* 3523 * We are at a section of allocated data, just skip forward 3524 * until the end of the data or the end of the region 3525 * we are supposed to fallocate, whichever comes first. 3526 */ 3527 l = le64_to_cpu(tmp_data->length); 3528 if (len < l) 3529 l = len; 3530 off += l; 3531 len -= l; 3532 3533 tmp_data = &tmp_data[1]; 3534 out_data_len -= sizeof(struct file_allocated_range_buffer); 3535 } 3536 3537 out: 3538 kfree(out_data); 3539 kfree(buf); 3540 return rc; 3541 } 3542 3543 3544 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, 3545 loff_t off, loff_t len, bool keep_size) 3546 { 3547 struct inode *inode; 3548 struct cifsInodeInfo *cifsi; 3549 struct cifsFileInfo *cfile = file->private_data; 3550 long rc = -EOPNOTSUPP; 3551 unsigned int xid; 3552 __le64 eof; 3553 3554 xid = get_xid(); 3555 3556 inode = d_inode(cfile->dentry); 3557 cifsi = CIFS_I(inode); 3558 3559 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, 3560 tcon->ses->Suid, off, len); 3561 /* if file not oplocked can't be sure whether asking to extend size */ 3562 if (!CIFS_CACHE_READ(cifsi)) 3563 if (keep_size == false) { 3564 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, 3565 tcon->tid, tcon->ses->Suid, off, len, rc); 3566 free_xid(xid); 3567 return rc; 3568 } 3569 3570 /* 3571 * Extending the file 3572 */ 3573 if ((keep_size == false) && i_size_read(inode) < off + len) { 3574 rc = inode_newsize_ok(inode, off + len); 3575 if (rc) 3576 goto out; 3577 3578 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) 3579 smb2_set_sparse(xid, tcon, cfile, inode, false); 3580 3581 eof = cpu_to_le64(off + len); 3582 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3583 cfile->fid.volatile_fid, cfile->pid, &eof); 3584 if (rc == 0) { 3585 cifsi->server_eof = off + len; 3586 cifs_setsize(inode, off + len); 3587 cifs_truncate_page(inode->i_mapping, inode->i_size); 3588 truncate_setsize(inode, off + len); 3589 } 3590 goto out; 3591 } 3592 3593 /* 3594 * Files are non-sparse by default so falloc may be a no-op 3595 * Must check if file sparse. If not sparse, and since we are not 3596 * extending then no need to do anything since file already allocated 3597 */ 3598 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { 3599 rc = 0; 3600 goto out; 3601 } 3602 3603 if (keep_size == true) { 3604 /* 3605 * We can not preallocate pages beyond the end of the file 3606 * in SMB2 3607 */ 3608 if (off >= i_size_read(inode)) { 3609 rc = 0; 3610 goto out; 3611 } 3612 /* 3613 * For fallocates that are partially beyond the end of file, 3614 * clamp len so we only fallocate up to the end of file. 3615 */ 3616 if (off + len > i_size_read(inode)) { 3617 len = i_size_read(inode) - off; 3618 } 3619 } 3620 3621 if ((keep_size == true) || (i_size_read(inode) >= off + len)) { 3622 /* 3623 * At this point, we are trying to fallocate an internal 3624 * regions of a sparse file. Since smb2 does not have a 3625 * fallocate command we have two otions on how to emulate this. 3626 * We can either turn the entire file to become non-sparse 3627 * which we only do if the fallocate is for virtually 3628 * the whole file, or we can overwrite the region with zeroes 3629 * using SMB2_write, which could be prohibitevly expensive 3630 * if len is large. 3631 */ 3632 /* 3633 * We are only trying to fallocate a small region so 3634 * just write it with zero. 3635 */ 3636 if (len <= 1024 * 1024) { 3637 rc = smb3_simple_fallocate_range(xid, tcon, cfile, 3638 off, len); 3639 goto out; 3640 } 3641 3642 /* 3643 * Check if falloc starts within first few pages of file 3644 * and ends within a few pages of the end of file to 3645 * ensure that most of file is being forced to be 3646 * fallocated now. If so then setting whole file sparse 3647 * ie potentially making a few extra pages at the beginning 3648 * or end of the file non-sparse via set_sparse is harmless. 3649 */ 3650 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { 3651 rc = -EOPNOTSUPP; 3652 goto out; 3653 } 3654 } 3655 3656 smb2_set_sparse(xid, tcon, cfile, inode, false); 3657 rc = 0; 3658 3659 out: 3660 if (rc) 3661 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, 3662 tcon->ses->Suid, off, len, rc); 3663 else 3664 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, 3665 tcon->ses->Suid, off, len); 3666 3667 free_xid(xid); 3668 return rc; 3669 } 3670 3671 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, 3672 loff_t off, loff_t len) 3673 { 3674 int rc; 3675 unsigned int xid; 3676 struct inode *inode = file_inode(file); 3677 struct cifsFileInfo *cfile = file->private_data; 3678 struct cifsInodeInfo *cifsi = CIFS_I(inode); 3679 __le64 eof; 3680 loff_t old_eof; 3681 3682 xid = get_xid(); 3683 3684 inode_lock(inode); 3685 3686 old_eof = i_size_read(inode); 3687 if ((off >= old_eof) || 3688 off + len >= old_eof) { 3689 rc = -EINVAL; 3690 goto out; 3691 } 3692 3693 filemap_invalidate_lock(inode->i_mapping); 3694 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); 3695 if (rc < 0) 3696 goto out_2; 3697 3698 truncate_pagecache_range(inode, off, old_eof); 3699 3700 rc = smb2_copychunk_range(xid, cfile, cfile, off + len, 3701 old_eof - off - len, off); 3702 if (rc < 0) 3703 goto out_2; 3704 3705 eof = cpu_to_le64(old_eof - len); 3706 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3707 cfile->fid.volatile_fid, cfile->pid, &eof); 3708 if (rc < 0) 3709 goto out_2; 3710 3711 rc = 0; 3712 3713 cifsi->server_eof = i_size_read(inode) - len; 3714 truncate_setsize(inode, cifsi->server_eof); 3715 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof); 3716 out_2: 3717 filemap_invalidate_unlock(inode->i_mapping); 3718 out: 3719 inode_unlock(inode); 3720 free_xid(xid); 3721 return rc; 3722 } 3723 3724 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, 3725 loff_t off, loff_t len) 3726 { 3727 int rc; 3728 unsigned int xid; 3729 struct cifsFileInfo *cfile = file->private_data; 3730 struct inode *inode = file_inode(file); 3731 __le64 eof; 3732 __u64 count, old_eof; 3733 3734 xid = get_xid(); 3735 3736 inode_lock(inode); 3737 3738 old_eof = i_size_read(inode); 3739 if (off >= old_eof) { 3740 rc = -EINVAL; 3741 goto out; 3742 } 3743 3744 count = old_eof - off; 3745 eof = cpu_to_le64(old_eof + len); 3746 3747 filemap_invalidate_lock(inode->i_mapping); 3748 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1); 3749 if (rc < 0) 3750 goto out_2; 3751 truncate_pagecache_range(inode, off, old_eof); 3752 3753 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, 3754 cfile->fid.volatile_fid, cfile->pid, &eof); 3755 if (rc < 0) 3756 goto out_2; 3757 3758 truncate_setsize(inode, old_eof + len); 3759 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); 3760 3761 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); 3762 if (rc < 0) 3763 goto out_2; 3764 3765 rc = smb3_zero_data(file, tcon, off, len, xid); 3766 if (rc < 0) 3767 goto out_2; 3768 3769 rc = 0; 3770 out_2: 3771 filemap_invalidate_unlock(inode->i_mapping); 3772 out: 3773 inode_unlock(inode); 3774 free_xid(xid); 3775 return rc; 3776 } 3777 3778 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) 3779 { 3780 struct cifsFileInfo *wrcfile, *cfile = file->private_data; 3781 struct cifsInodeInfo *cifsi; 3782 struct inode *inode; 3783 int rc = 0; 3784 struct file_allocated_range_buffer in_data, *out_data = NULL; 3785 u32 out_data_len; 3786 unsigned int xid; 3787 3788 if (whence != SEEK_HOLE && whence != SEEK_DATA) 3789 return generic_file_llseek(file, offset, whence); 3790 3791 inode = d_inode(cfile->dentry); 3792 cifsi = CIFS_I(inode); 3793 3794 if (offset < 0 || offset >= i_size_read(inode)) 3795 return -ENXIO; 3796 3797 xid = get_xid(); 3798 /* 3799 * We need to be sure that all dirty pages are written as they 3800 * might fill holes on the server. 3801 * Note that we also MUST flush any written pages since at least 3802 * some servers (Windows2016) will not reflect recent writes in 3803 * QUERY_ALLOCATED_RANGES until SMB2_flush is called. 3804 */ 3805 wrcfile = find_writable_file(cifsi, FIND_WR_ANY); 3806 if (wrcfile) { 3807 filemap_write_and_wait(inode->i_mapping); 3808 smb2_flush_file(xid, tcon, &wrcfile->fid); 3809 cifsFileInfo_put(wrcfile); 3810 } 3811 3812 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { 3813 if (whence == SEEK_HOLE) 3814 offset = i_size_read(inode); 3815 goto lseek_exit; 3816 } 3817 3818 in_data.file_offset = cpu_to_le64(offset); 3819 in_data.length = cpu_to_le64(i_size_read(inode)); 3820 3821 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3822 cfile->fid.volatile_fid, 3823 FSCTL_QUERY_ALLOCATED_RANGES, 3824 (char *)&in_data, sizeof(in_data), 3825 sizeof(struct file_allocated_range_buffer), 3826 (char **)&out_data, &out_data_len); 3827 if (rc == -E2BIG) 3828 rc = 0; 3829 if (rc) 3830 goto lseek_exit; 3831 3832 if (whence == SEEK_HOLE && out_data_len == 0) 3833 goto lseek_exit; 3834 3835 if (whence == SEEK_DATA && out_data_len == 0) { 3836 rc = -ENXIO; 3837 goto lseek_exit; 3838 } 3839 3840 if (out_data_len < sizeof(struct file_allocated_range_buffer)) { 3841 rc = -EINVAL; 3842 goto lseek_exit; 3843 } 3844 if (whence == SEEK_DATA) { 3845 offset = le64_to_cpu(out_data->file_offset); 3846 goto lseek_exit; 3847 } 3848 if (offset < le64_to_cpu(out_data->file_offset)) 3849 goto lseek_exit; 3850 3851 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); 3852 3853 lseek_exit: 3854 free_xid(xid); 3855 kfree(out_data); 3856 if (!rc) 3857 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); 3858 else 3859 return rc; 3860 } 3861 3862 static int smb3_fiemap(struct cifs_tcon *tcon, 3863 struct cifsFileInfo *cfile, 3864 struct fiemap_extent_info *fei, u64 start, u64 len) 3865 { 3866 unsigned int xid; 3867 struct file_allocated_range_buffer in_data, *out_data; 3868 u32 out_data_len; 3869 int i, num, rc, flags, last_blob; 3870 u64 next; 3871 3872 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); 3873 if (rc) 3874 return rc; 3875 3876 xid = get_xid(); 3877 again: 3878 in_data.file_offset = cpu_to_le64(start); 3879 in_data.length = cpu_to_le64(len); 3880 3881 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, 3882 cfile->fid.volatile_fid, 3883 FSCTL_QUERY_ALLOCATED_RANGES, 3884 (char *)&in_data, sizeof(in_data), 3885 1024 * sizeof(struct file_allocated_range_buffer), 3886 (char **)&out_data, &out_data_len); 3887 if (rc == -E2BIG) { 3888 last_blob = 0; 3889 rc = 0; 3890 } else 3891 last_blob = 1; 3892 if (rc) 3893 goto out; 3894 3895 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { 3896 rc = -EINVAL; 3897 goto out; 3898 } 3899 if (out_data_len % sizeof(struct file_allocated_range_buffer)) { 3900 rc = -EINVAL; 3901 goto out; 3902 } 3903 3904 num = out_data_len / sizeof(struct file_allocated_range_buffer); 3905 for (i = 0; i < num; i++) { 3906 flags = 0; 3907 if (i == num - 1 && last_blob) 3908 flags |= FIEMAP_EXTENT_LAST; 3909 3910 rc = fiemap_fill_next_extent(fei, 3911 le64_to_cpu(out_data[i].file_offset), 3912 le64_to_cpu(out_data[i].file_offset), 3913 le64_to_cpu(out_data[i].length), 3914 flags); 3915 if (rc < 0) 3916 goto out; 3917 if (rc == 1) { 3918 rc = 0; 3919 goto out; 3920 } 3921 } 3922 3923 if (!last_blob) { 3924 next = le64_to_cpu(out_data[num - 1].file_offset) + 3925 le64_to_cpu(out_data[num - 1].length); 3926 len = len - (next - start); 3927 start = next; 3928 goto again; 3929 } 3930 3931 out: 3932 free_xid(xid); 3933 kfree(out_data); 3934 return rc; 3935 } 3936 3937 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, 3938 loff_t off, loff_t len) 3939 { 3940 /* KEEP_SIZE already checked for by do_fallocate */ 3941 if (mode & FALLOC_FL_PUNCH_HOLE) 3942 return smb3_punch_hole(file, tcon, off, len); 3943 else if (mode & FALLOC_FL_ZERO_RANGE) { 3944 if (mode & FALLOC_FL_KEEP_SIZE) 3945 return smb3_zero_range(file, tcon, off, len, true); 3946 return smb3_zero_range(file, tcon, off, len, false); 3947 } else if (mode == FALLOC_FL_KEEP_SIZE) 3948 return smb3_simple_falloc(file, tcon, off, len, true); 3949 else if (mode == FALLOC_FL_COLLAPSE_RANGE) 3950 return smb3_collapse_range(file, tcon, off, len); 3951 else if (mode == FALLOC_FL_INSERT_RANGE) 3952 return smb3_insert_range(file, tcon, off, len); 3953 else if (mode == 0) 3954 return smb3_simple_falloc(file, tcon, off, len, false); 3955 3956 return -EOPNOTSUPP; 3957 } 3958 3959 static void 3960 smb2_downgrade_oplock(struct TCP_Server_Info *server, 3961 struct cifsInodeInfo *cinode, __u32 oplock, 3962 unsigned int epoch, bool *purge_cache) 3963 { 3964 server->ops->set_oplock_level(cinode, oplock, 0, NULL); 3965 } 3966 3967 static void 3968 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3969 unsigned int epoch, bool *purge_cache); 3970 3971 static void 3972 smb3_downgrade_oplock(struct TCP_Server_Info *server, 3973 struct cifsInodeInfo *cinode, __u32 oplock, 3974 unsigned int epoch, bool *purge_cache) 3975 { 3976 unsigned int old_state = cinode->oplock; 3977 unsigned int old_epoch = cinode->epoch; 3978 unsigned int new_state; 3979 3980 if (epoch > old_epoch) { 3981 smb21_set_oplock_level(cinode, oplock, 0, NULL); 3982 cinode->epoch = epoch; 3983 } 3984 3985 new_state = cinode->oplock; 3986 *purge_cache = false; 3987 3988 if ((old_state & CIFS_CACHE_READ_FLG) != 0 && 3989 (new_state & CIFS_CACHE_READ_FLG) == 0) 3990 *purge_cache = true; 3991 else if (old_state == new_state && (epoch - old_epoch > 1)) 3992 *purge_cache = true; 3993 } 3994 3995 static void 3996 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 3997 unsigned int epoch, bool *purge_cache) 3998 { 3999 oplock &= 0xFF; 4000 cinode->lease_granted = false; 4001 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4002 return; 4003 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { 4004 cinode->oplock = CIFS_CACHE_RHW_FLG; 4005 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", 4006 &cinode->netfs.inode); 4007 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { 4008 cinode->oplock = CIFS_CACHE_RW_FLG; 4009 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", 4010 &cinode->netfs.inode); 4011 } else if (oplock == SMB2_OPLOCK_LEVEL_II) { 4012 cinode->oplock = CIFS_CACHE_READ_FLG; 4013 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", 4014 &cinode->netfs.inode); 4015 } else 4016 cinode->oplock = 0; 4017 } 4018 4019 static void 4020 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4021 unsigned int epoch, bool *purge_cache) 4022 { 4023 char message[5] = {0}; 4024 unsigned int new_oplock = 0; 4025 4026 oplock &= 0xFF; 4027 cinode->lease_granted = true; 4028 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) 4029 return; 4030 4031 /* Check if the server granted an oplock rather than a lease */ 4032 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4033 return smb2_set_oplock_level(cinode, oplock, epoch, 4034 purge_cache); 4035 4036 if (oplock & SMB2_LEASE_READ_CACHING_HE) { 4037 new_oplock |= CIFS_CACHE_READ_FLG; 4038 strcat(message, "R"); 4039 } 4040 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { 4041 new_oplock |= CIFS_CACHE_HANDLE_FLG; 4042 strcat(message, "H"); 4043 } 4044 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { 4045 new_oplock |= CIFS_CACHE_WRITE_FLG; 4046 strcat(message, "W"); 4047 } 4048 if (!new_oplock) 4049 strncpy(message, "None", sizeof(message)); 4050 4051 cinode->oplock = new_oplock; 4052 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, 4053 &cinode->netfs.inode); 4054 } 4055 4056 static void 4057 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, 4058 unsigned int epoch, bool *purge_cache) 4059 { 4060 unsigned int old_oplock = cinode->oplock; 4061 4062 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); 4063 4064 if (purge_cache) { 4065 *purge_cache = false; 4066 if (old_oplock == CIFS_CACHE_READ_FLG) { 4067 if (cinode->oplock == CIFS_CACHE_READ_FLG && 4068 (epoch - cinode->epoch > 0)) 4069 *purge_cache = true; 4070 else if (cinode->oplock == CIFS_CACHE_RH_FLG && 4071 (epoch - cinode->epoch > 1)) 4072 *purge_cache = true; 4073 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4074 (epoch - cinode->epoch > 1)) 4075 *purge_cache = true; 4076 else if (cinode->oplock == 0 && 4077 (epoch - cinode->epoch > 0)) 4078 *purge_cache = true; 4079 } else if (old_oplock == CIFS_CACHE_RH_FLG) { 4080 if (cinode->oplock == CIFS_CACHE_RH_FLG && 4081 (epoch - cinode->epoch > 0)) 4082 *purge_cache = true; 4083 else if (cinode->oplock == CIFS_CACHE_RHW_FLG && 4084 (epoch - cinode->epoch > 1)) 4085 *purge_cache = true; 4086 } 4087 cinode->epoch = epoch; 4088 } 4089 } 4090 4091 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 4092 static bool 4093 smb2_is_read_op(__u32 oplock) 4094 { 4095 return oplock == SMB2_OPLOCK_LEVEL_II; 4096 } 4097 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 4098 4099 static bool 4100 smb21_is_read_op(__u32 oplock) 4101 { 4102 return (oplock & SMB2_LEASE_READ_CACHING_HE) && 4103 !(oplock & SMB2_LEASE_WRITE_CACHING_HE); 4104 } 4105 4106 static __le32 4107 map_oplock_to_lease(u8 oplock) 4108 { 4109 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) 4110 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; 4111 else if (oplock == SMB2_OPLOCK_LEVEL_II) 4112 return SMB2_LEASE_READ_CACHING_LE; 4113 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) 4114 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | 4115 SMB2_LEASE_WRITE_CACHING_LE; 4116 return 0; 4117 } 4118 4119 static char * 4120 smb2_create_lease_buf(u8 *lease_key, u8 oplock) 4121 { 4122 struct create_lease *buf; 4123 4124 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); 4125 if (!buf) 4126 return NULL; 4127 4128 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4129 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4130 4131 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4132 (struct create_lease, lcontext)); 4133 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); 4134 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4135 (struct create_lease, Name)); 4136 buf->ccontext.NameLength = cpu_to_le16(4); 4137 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4138 buf->Name[0] = 'R'; 4139 buf->Name[1] = 'q'; 4140 buf->Name[2] = 'L'; 4141 buf->Name[3] = 's'; 4142 return (char *)buf; 4143 } 4144 4145 static char * 4146 smb3_create_lease_buf(u8 *lease_key, u8 oplock) 4147 { 4148 struct create_lease_v2 *buf; 4149 4150 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); 4151 if (!buf) 4152 return NULL; 4153 4154 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); 4155 buf->lcontext.LeaseState = map_oplock_to_lease(oplock); 4156 4157 buf->ccontext.DataOffset = cpu_to_le16(offsetof 4158 (struct create_lease_v2, lcontext)); 4159 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); 4160 buf->ccontext.NameOffset = cpu_to_le16(offsetof 4161 (struct create_lease_v2, Name)); 4162 buf->ccontext.NameLength = cpu_to_le16(4); 4163 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ 4164 buf->Name[0] = 'R'; 4165 buf->Name[1] = 'q'; 4166 buf->Name[2] = 'L'; 4167 buf->Name[3] = 's'; 4168 return (char *)buf; 4169 } 4170 4171 static __u8 4172 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4173 { 4174 struct create_lease *lc = (struct create_lease *)buf; 4175 4176 *epoch = 0; /* not used */ 4177 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4178 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4179 return le32_to_cpu(lc->lcontext.LeaseState); 4180 } 4181 4182 static __u8 4183 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) 4184 { 4185 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; 4186 4187 *epoch = le16_to_cpu(lc->lcontext.Epoch); 4188 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) 4189 return SMB2_OPLOCK_LEVEL_NOCHANGE; 4190 if (lease_key) 4191 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); 4192 return le32_to_cpu(lc->lcontext.LeaseState); 4193 } 4194 4195 static unsigned int 4196 smb2_wp_retry_size(struct inode *inode) 4197 { 4198 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, 4199 SMB2_MAX_BUFFER_SIZE); 4200 } 4201 4202 static bool 4203 smb2_dir_needs_close(struct cifsFileInfo *cfile) 4204 { 4205 return !cfile->invalidHandle; 4206 } 4207 4208 static void 4209 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, 4210 struct smb_rqst *old_rq, __le16 cipher_type) 4211 { 4212 struct smb2_hdr *shdr = 4213 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; 4214 4215 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); 4216 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 4217 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 4218 tr_hdr->Flags = cpu_to_le16(0x01); 4219 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4220 (cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4221 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4222 else 4223 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4224 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8); 4225 } 4226 4227 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, 4228 int num_rqst, const u8 *sig, u8 **iv, 4229 struct aead_request **req, struct sg_table *sgt, 4230 unsigned int *num_sgs, size_t *sensitive_size) 4231 { 4232 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); 4233 unsigned int iv_size = crypto_aead_ivsize(tfm); 4234 unsigned int len; 4235 u8 *p; 4236 4237 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); 4238 if (IS_ERR_VALUE((long)(int)*num_sgs)) 4239 return ERR_PTR(*num_sgs); 4240 4241 len = iv_size; 4242 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); 4243 len = ALIGN(len, crypto_tfm_ctx_alignment()); 4244 len += req_size; 4245 len = ALIGN(len, __alignof__(struct scatterlist)); 4246 len += array_size(*num_sgs, sizeof(struct scatterlist)); 4247 *sensitive_size = len; 4248 4249 p = kvzalloc(len, GFP_NOFS); 4250 if (!p) 4251 return ERR_PTR(-ENOMEM); 4252 4253 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); 4254 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, 4255 crypto_tfm_ctx_alignment()); 4256 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, 4257 __alignof__(struct scatterlist)); 4258 return p; 4259 } 4260 4261 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, 4262 int num_rqst, const u8 *sig, u8 **iv, 4263 struct aead_request **req, struct scatterlist **sgl, 4264 size_t *sensitive_size) 4265 { 4266 struct sg_table sgtable = {}; 4267 unsigned int skip, num_sgs, i, j; 4268 ssize_t rc; 4269 void *p; 4270 4271 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, 4272 &num_sgs, sensitive_size); 4273 if (IS_ERR(p)) 4274 return ERR_CAST(p); 4275 4276 sg_init_marker(sgtable.sgl, num_sgs); 4277 4278 /* 4279 * The first rqst has a transform header where the 4280 * first 20 bytes are not part of the encrypted blob. 4281 */ 4282 skip = 20; 4283 4284 for (i = 0; i < num_rqst; i++) { 4285 struct iov_iter *iter = &rqst[i].rq_iter; 4286 size_t count = iov_iter_count(iter); 4287 4288 for (j = 0; j < rqst[i].rq_nvec; j++) { 4289 cifs_sg_set_buf(&sgtable, 4290 rqst[i].rq_iov[j].iov_base + skip, 4291 rqst[i].rq_iov[j].iov_len - skip); 4292 4293 /* See the above comment on the 'skip' assignment */ 4294 skip = 0; 4295 } 4296 sgtable.orig_nents = sgtable.nents; 4297 4298 rc = extract_iter_to_sg(iter, count, &sgtable, 4299 num_sgs - sgtable.nents, 0); 4300 iov_iter_revert(iter, rc); 4301 sgtable.orig_nents = sgtable.nents; 4302 } 4303 4304 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); 4305 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); 4306 *sgl = sgtable.sgl; 4307 return p; 4308 } 4309 4310 static int 4311 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) 4312 { 4313 struct TCP_Server_Info *pserver; 4314 struct cifs_ses *ses; 4315 u8 *ses_enc_key; 4316 4317 /* If server is a channel, select the primary channel */ 4318 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 4319 4320 spin_lock(&cifs_tcp_ses_lock); 4321 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 4322 if (ses->Suid == ses_id) { 4323 spin_lock(&ses->ses_lock); 4324 ses_enc_key = enc ? ses->smb3encryptionkey : 4325 ses->smb3decryptionkey; 4326 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); 4327 spin_unlock(&ses->ses_lock); 4328 spin_unlock(&cifs_tcp_ses_lock); 4329 return 0; 4330 } 4331 } 4332 spin_unlock(&cifs_tcp_ses_lock); 4333 4334 trace_smb3_ses_not_found(ses_id); 4335 4336 return -EAGAIN; 4337 } 4338 /* 4339 * Encrypt or decrypt @rqst message. @rqst[0] has the following format: 4340 * iov[0] - transform header (associate data), 4341 * iov[1-N] - SMB2 header and pages - data to encrypt. 4342 * On success return encrypted data in iov[1-N] and pages, leave iov[0] 4343 * untouched. 4344 */ 4345 static int 4346 crypt_message(struct TCP_Server_Info *server, int num_rqst, 4347 struct smb_rqst *rqst, int enc) 4348 { 4349 struct smb2_transform_hdr *tr_hdr = 4350 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; 4351 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; 4352 int rc = 0; 4353 struct scatterlist *sg; 4354 u8 sign[SMB2_SIGNATURE_SIZE] = {}; 4355 u8 key[SMB3_ENC_DEC_KEY_SIZE]; 4356 struct aead_request *req; 4357 u8 *iv; 4358 DECLARE_CRYPTO_WAIT(wait); 4359 struct crypto_aead *tfm; 4360 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 4361 void *creq; 4362 size_t sensitive_size; 4363 4364 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); 4365 if (rc) { 4366 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, 4367 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); 4368 return rc; 4369 } 4370 4371 rc = smb3_crypto_aead_allocate(server); 4372 if (rc) { 4373 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); 4374 return rc; 4375 } 4376 4377 tfm = enc ? server->secmech.enc : server->secmech.dec; 4378 4379 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || 4380 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4381 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); 4382 else 4383 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); 4384 4385 if (rc) { 4386 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); 4387 return rc; 4388 } 4389 4390 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); 4391 if (rc) { 4392 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); 4393 return rc; 4394 } 4395 4396 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, 4397 &sensitive_size); 4398 if (IS_ERR(creq)) 4399 return PTR_ERR(creq); 4400 4401 if (!enc) { 4402 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); 4403 crypt_len += SMB2_SIGNATURE_SIZE; 4404 } 4405 4406 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || 4407 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) 4408 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 4409 else { 4410 iv[0] = 3; 4411 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 4412 } 4413 4414 aead_request_set_tfm(req, tfm); 4415 aead_request_set_crypt(req, sg, sg, crypt_len, iv); 4416 aead_request_set_ad(req, assoc_data_len); 4417 4418 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, 4419 crypto_req_done, &wait); 4420 4421 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) 4422 : crypto_aead_decrypt(req), &wait); 4423 4424 if (!rc && enc) 4425 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); 4426 4427 kvfree_sensitive(creq, sensitive_size); 4428 return rc; 4429 } 4430 4431 /* 4432 * Clear a read buffer, discarding the folios which have XA_MARK_0 set. 4433 */ 4434 static void cifs_clear_xarray_buffer(struct xarray *buffer) 4435 { 4436 struct folio *folio; 4437 4438 XA_STATE(xas, buffer, 0); 4439 4440 rcu_read_lock(); 4441 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { 4442 folio_put(folio); 4443 } 4444 rcu_read_unlock(); 4445 xa_destroy(buffer); 4446 } 4447 4448 void 4449 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) 4450 { 4451 int i; 4452 4453 for (i = 0; i < num_rqst; i++) 4454 if (!xa_empty(&rqst[i].rq_buffer)) 4455 cifs_clear_xarray_buffer(&rqst[i].rq_buffer); 4456 } 4457 4458 /* 4459 * This function will initialize new_rq and encrypt the content. 4460 * The first entry, new_rq[0], only contains a single iov which contains 4461 * a smb2_transform_hdr and is pre-allocated by the caller. 4462 * This function then populates new_rq[1+] with the content from olq_rq[0+]. 4463 * 4464 * The end result is an array of smb_rqst structures where the first structure 4465 * only contains a single iov for the transform header which we then can pass 4466 * to crypt_message(). 4467 * 4468 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller 4469 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests 4470 */ 4471 static int 4472 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, 4473 struct smb_rqst *new_rq, struct smb_rqst *old_rq) 4474 { 4475 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; 4476 struct page *page; 4477 unsigned int orig_len = 0; 4478 int i, j; 4479 int rc = -ENOMEM; 4480 4481 for (i = 1; i < num_rqst; i++) { 4482 struct smb_rqst *old = &old_rq[i - 1]; 4483 struct smb_rqst *new = &new_rq[i]; 4484 struct xarray *buffer = &new->rq_buffer; 4485 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; 4486 4487 orig_len += smb_rqst_len(server, old); 4488 new->rq_iov = old->rq_iov; 4489 new->rq_nvec = old->rq_nvec; 4490 4491 xa_init(buffer); 4492 4493 if (size > 0) { 4494 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); 4495 4496 for (j = 0; j < npages; j++) { 4497 void *o; 4498 4499 rc = -ENOMEM; 4500 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4501 if (!page) 4502 goto err_free; 4503 page->index = j; 4504 o = xa_store(buffer, j, page, GFP_KERNEL); 4505 if (xa_is_err(o)) { 4506 rc = xa_err(o); 4507 put_page(page); 4508 goto err_free; 4509 } 4510 4511 xa_set_mark(buffer, j, XA_MARK_0); 4512 4513 seg = min_t(size_t, size - copied, PAGE_SIZE); 4514 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { 4515 rc = -EFAULT; 4516 goto err_free; 4517 } 4518 copied += seg; 4519 } 4520 iov_iter_xarray(&new->rq_iter, ITER_SOURCE, 4521 buffer, 0, size); 4522 new->rq_iter_size = size; 4523 } 4524 } 4525 4526 /* fill the 1st iov with a transform header */ 4527 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); 4528 4529 rc = crypt_message(server, num_rqst, new_rq, 1); 4530 cifs_dbg(FYI, "Encrypt message returned %d\n", rc); 4531 if (rc) 4532 goto err_free; 4533 4534 return rc; 4535 4536 err_free: 4537 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); 4538 return rc; 4539 } 4540 4541 static int 4542 smb3_is_transform_hdr(void *buf) 4543 { 4544 struct smb2_transform_hdr *trhdr = buf; 4545 4546 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 4547 } 4548 4549 static int 4550 decrypt_raw_data(struct TCP_Server_Info *server, char *buf, 4551 unsigned int buf_data_size, struct iov_iter *iter, 4552 bool is_offloaded) 4553 { 4554 struct kvec iov[2]; 4555 struct smb_rqst rqst = {NULL}; 4556 size_t iter_size = 0; 4557 int rc; 4558 4559 iov[0].iov_base = buf; 4560 iov[0].iov_len = sizeof(struct smb2_transform_hdr); 4561 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); 4562 iov[1].iov_len = buf_data_size; 4563 4564 rqst.rq_iov = iov; 4565 rqst.rq_nvec = 2; 4566 if (iter) { 4567 rqst.rq_iter = *iter; 4568 rqst.rq_iter_size = iov_iter_count(iter); 4569 iter_size = iov_iter_count(iter); 4570 } 4571 4572 rc = crypt_message(server, 1, &rqst, 0); 4573 cifs_dbg(FYI, "Decrypt message returned %d\n", rc); 4574 4575 if (rc) 4576 return rc; 4577 4578 memmove(buf, iov[1].iov_base, buf_data_size); 4579 4580 if (!is_offloaded) 4581 server->total_read = buf_data_size + iter_size; 4582 4583 return rc; 4584 } 4585 4586 static int 4587 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, 4588 unsigned int skip, struct iov_iter *iter) 4589 { 4590 struct page *page; 4591 unsigned long index; 4592 4593 xa_for_each(pages, index, page) { 4594 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); 4595 4596 n = copy_page_to_iter(page, skip, len, iter); 4597 if (n != len) { 4598 cifs_dbg(VFS, "%s: something went wrong\n", __func__); 4599 return -EIO; 4600 } 4601 data_size -= n; 4602 skip = 0; 4603 } 4604 4605 return 0; 4606 } 4607 4608 static int 4609 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, 4610 char *buf, unsigned int buf_len, struct xarray *pages, 4611 unsigned int pages_len, bool is_offloaded) 4612 { 4613 unsigned int data_offset; 4614 unsigned int data_len; 4615 unsigned int cur_off; 4616 unsigned int cur_page_idx; 4617 unsigned int pad_len; 4618 struct cifs_readdata *rdata = mid->callback_data; 4619 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; 4620 int length; 4621 bool use_rdma_mr = false; 4622 4623 if (shdr->Command != SMB2_READ) { 4624 cifs_server_dbg(VFS, "only big read responses are supported\n"); 4625 return -EOPNOTSUPP; 4626 } 4627 4628 if (server->ops->is_session_expired && 4629 server->ops->is_session_expired(buf)) { 4630 if (!is_offloaded) 4631 cifs_reconnect(server, true); 4632 return -1; 4633 } 4634 4635 if (server->ops->is_status_pending && 4636 server->ops->is_status_pending(buf, server)) 4637 return -1; 4638 4639 /* set up first two iov to get credits */ 4640 rdata->iov[0].iov_base = buf; 4641 rdata->iov[0].iov_len = 0; 4642 rdata->iov[1].iov_base = buf; 4643 rdata->iov[1].iov_len = 4644 min_t(unsigned int, buf_len, server->vals->read_rsp_size); 4645 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", 4646 rdata->iov[0].iov_base, rdata->iov[0].iov_len); 4647 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", 4648 rdata->iov[1].iov_base, rdata->iov[1].iov_len); 4649 4650 rdata->result = server->ops->map_error(buf, true); 4651 if (rdata->result != 0) { 4652 cifs_dbg(FYI, "%s: server returned error %d\n", 4653 __func__, rdata->result); 4654 /* normal error on read response */ 4655 if (is_offloaded) 4656 mid->mid_state = MID_RESPONSE_RECEIVED; 4657 else 4658 dequeue_mid(mid, false); 4659 return 0; 4660 } 4661 4662 data_offset = server->ops->read_data_offset(buf); 4663 #ifdef CONFIG_CIFS_SMB_DIRECT 4664 use_rdma_mr = rdata->mr; 4665 #endif 4666 data_len = server->ops->read_data_length(buf, use_rdma_mr); 4667 4668 if (data_offset < server->vals->read_rsp_size) { 4669 /* 4670 * win2k8 sometimes sends an offset of 0 when the read 4671 * is beyond the EOF. Treat it as if the data starts just after 4672 * the header. 4673 */ 4674 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", 4675 __func__, data_offset); 4676 data_offset = server->vals->read_rsp_size; 4677 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { 4678 /* data_offset is beyond the end of smallbuf */ 4679 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", 4680 __func__, data_offset); 4681 rdata->result = -EIO; 4682 if (is_offloaded) 4683 mid->mid_state = MID_RESPONSE_MALFORMED; 4684 else 4685 dequeue_mid(mid, rdata->result); 4686 return 0; 4687 } 4688 4689 pad_len = data_offset - server->vals->read_rsp_size; 4690 4691 if (buf_len <= data_offset) { 4692 /* read response payload is in pages */ 4693 cur_page_idx = pad_len / PAGE_SIZE; 4694 cur_off = pad_len % PAGE_SIZE; 4695 4696 if (cur_page_idx != 0) { 4697 /* data offset is beyond the 1st page of response */ 4698 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", 4699 __func__, data_offset); 4700 rdata->result = -EIO; 4701 if (is_offloaded) 4702 mid->mid_state = MID_RESPONSE_MALFORMED; 4703 else 4704 dequeue_mid(mid, rdata->result); 4705 return 0; 4706 } 4707 4708 if (data_len > pages_len - pad_len) { 4709 /* data_len is corrupt -- discard frame */ 4710 rdata->result = -EIO; 4711 if (is_offloaded) 4712 mid->mid_state = MID_RESPONSE_MALFORMED; 4713 else 4714 dequeue_mid(mid, rdata->result); 4715 return 0; 4716 } 4717 4718 /* Copy the data to the output I/O iterator. */ 4719 rdata->result = cifs_copy_pages_to_iter(pages, pages_len, 4720 cur_off, &rdata->iter); 4721 if (rdata->result != 0) { 4722 if (is_offloaded) 4723 mid->mid_state = MID_RESPONSE_MALFORMED; 4724 else 4725 dequeue_mid(mid, rdata->result); 4726 return 0; 4727 } 4728 rdata->got_bytes = pages_len; 4729 4730 } else if (buf_len >= data_offset + data_len) { 4731 /* read response payload is in buf */ 4732 WARN_ONCE(pages && !xa_empty(pages), 4733 "read data can be either in buf or in pages"); 4734 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter); 4735 if (length < 0) 4736 return length; 4737 rdata->got_bytes = data_len; 4738 } else { 4739 /* read response payload cannot be in both buf and pages */ 4740 WARN_ONCE(1, "buf can not contain only a part of read data"); 4741 rdata->result = -EIO; 4742 if (is_offloaded) 4743 mid->mid_state = MID_RESPONSE_MALFORMED; 4744 else 4745 dequeue_mid(mid, rdata->result); 4746 return 0; 4747 } 4748 4749 if (is_offloaded) 4750 mid->mid_state = MID_RESPONSE_RECEIVED; 4751 else 4752 dequeue_mid(mid, false); 4753 return 0; 4754 } 4755 4756 struct smb2_decrypt_work { 4757 struct work_struct decrypt; 4758 struct TCP_Server_Info *server; 4759 struct xarray buffer; 4760 char *buf; 4761 unsigned int len; 4762 }; 4763 4764 4765 static void smb2_decrypt_offload(struct work_struct *work) 4766 { 4767 struct smb2_decrypt_work *dw = container_of(work, 4768 struct smb2_decrypt_work, decrypt); 4769 int rc; 4770 struct mid_q_entry *mid; 4771 struct iov_iter iter; 4772 4773 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); 4774 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, 4775 &iter, true); 4776 if (rc) { 4777 cifs_dbg(VFS, "error decrypting rc=%d\n", rc); 4778 goto free_pages; 4779 } 4780 4781 dw->server->lstrp = jiffies; 4782 mid = smb2_find_dequeue_mid(dw->server, dw->buf); 4783 if (mid == NULL) 4784 cifs_dbg(FYI, "mid not found\n"); 4785 else { 4786 mid->decrypted = true; 4787 rc = handle_read_data(dw->server, mid, dw->buf, 4788 dw->server->vals->read_rsp_size, 4789 &dw->buffer, dw->len, 4790 true); 4791 if (rc >= 0) { 4792 #ifdef CONFIG_CIFS_STATS2 4793 mid->when_received = jiffies; 4794 #endif 4795 if (dw->server->ops->is_network_name_deleted) 4796 dw->server->ops->is_network_name_deleted(dw->buf, 4797 dw->server); 4798 4799 mid->callback(mid); 4800 } else { 4801 spin_lock(&dw->server->srv_lock); 4802 if (dw->server->tcpStatus == CifsNeedReconnect) { 4803 spin_lock(&dw->server->mid_lock); 4804 mid->mid_state = MID_RETRY_NEEDED; 4805 spin_unlock(&dw->server->mid_lock); 4806 spin_unlock(&dw->server->srv_lock); 4807 mid->callback(mid); 4808 } else { 4809 spin_lock(&dw->server->mid_lock); 4810 mid->mid_state = MID_REQUEST_SUBMITTED; 4811 mid->mid_flags &= ~(MID_DELETED); 4812 list_add_tail(&mid->qhead, 4813 &dw->server->pending_mid_q); 4814 spin_unlock(&dw->server->mid_lock); 4815 spin_unlock(&dw->server->srv_lock); 4816 } 4817 } 4818 release_mid(mid); 4819 } 4820 4821 free_pages: 4822 cifs_clear_xarray_buffer(&dw->buffer); 4823 cifs_small_buf_release(dw->buf); 4824 kfree(dw); 4825 } 4826 4827 4828 static int 4829 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, 4830 int *num_mids) 4831 { 4832 struct page *page; 4833 char *buf = server->smallbuf; 4834 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 4835 struct iov_iter iter; 4836 unsigned int len, npages; 4837 unsigned int buflen = server->pdu_size; 4838 int rc; 4839 int i = 0; 4840 struct smb2_decrypt_work *dw; 4841 4842 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); 4843 if (!dw) 4844 return -ENOMEM; 4845 xa_init(&dw->buffer); 4846 INIT_WORK(&dw->decrypt, smb2_decrypt_offload); 4847 dw->server = server; 4848 4849 *num_mids = 1; 4850 len = min_t(unsigned int, buflen, server->vals->read_rsp_size + 4851 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; 4852 4853 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); 4854 if (rc < 0) 4855 goto free_dw; 4856 server->total_read += rc; 4857 4858 len = le32_to_cpu(tr_hdr->OriginalMessageSize) - 4859 server->vals->read_rsp_size; 4860 dw->len = len; 4861 npages = DIV_ROUND_UP(len, PAGE_SIZE); 4862 4863 rc = -ENOMEM; 4864 for (; i < npages; i++) { 4865 void *old; 4866 4867 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); 4868 if (!page) 4869 goto discard_data; 4870 page->index = i; 4871 old = xa_store(&dw->buffer, i, page, GFP_KERNEL); 4872 if (xa_is_err(old)) { 4873 rc = xa_err(old); 4874 put_page(page); 4875 goto discard_data; 4876 } 4877 xa_set_mark(&dw->buffer, i, XA_MARK_0); 4878 } 4879 4880 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); 4881 4882 /* Read the data into the buffer and clear excess bufferage. */ 4883 rc = cifs_read_iter_from_socket(server, &iter, dw->len); 4884 if (rc < 0) 4885 goto discard_data; 4886 4887 server->total_read += rc; 4888 if (rc < npages * PAGE_SIZE) 4889 iov_iter_zero(npages * PAGE_SIZE - rc, &iter); 4890 iov_iter_revert(&iter, npages * PAGE_SIZE); 4891 iov_iter_truncate(&iter, dw->len); 4892 4893 rc = cifs_discard_remaining_data(server); 4894 if (rc) 4895 goto free_pages; 4896 4897 /* 4898 * For large reads, offload to different thread for better performance, 4899 * use more cores decrypting which can be expensive 4900 */ 4901 4902 if ((server->min_offload) && (server->in_flight > 1) && 4903 (server->pdu_size >= server->min_offload)) { 4904 dw->buf = server->smallbuf; 4905 server->smallbuf = (char *)cifs_small_buf_get(); 4906 4907 queue_work(decrypt_wq, &dw->decrypt); 4908 *num_mids = 0; /* worker thread takes care of finding mid */ 4909 return -1; 4910 } 4911 4912 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, 4913 &iter, false); 4914 if (rc) 4915 goto free_pages; 4916 4917 *mid = smb2_find_mid(server, buf); 4918 if (*mid == NULL) { 4919 cifs_dbg(FYI, "mid not found\n"); 4920 } else { 4921 cifs_dbg(FYI, "mid found\n"); 4922 (*mid)->decrypted = true; 4923 rc = handle_read_data(server, *mid, buf, 4924 server->vals->read_rsp_size, 4925 &dw->buffer, dw->len, false); 4926 if (rc >= 0) { 4927 if (server->ops->is_network_name_deleted) { 4928 server->ops->is_network_name_deleted(buf, 4929 server); 4930 } 4931 } 4932 } 4933 4934 free_pages: 4935 cifs_clear_xarray_buffer(&dw->buffer); 4936 free_dw: 4937 kfree(dw); 4938 return rc; 4939 discard_data: 4940 cifs_discard_remaining_data(server); 4941 goto free_pages; 4942 } 4943 4944 static int 4945 receive_encrypted_standard(struct TCP_Server_Info *server, 4946 struct mid_q_entry **mids, char **bufs, 4947 int *num_mids) 4948 { 4949 int ret, length; 4950 char *buf = server->smallbuf; 4951 struct smb2_hdr *shdr; 4952 unsigned int pdu_length = server->pdu_size; 4953 unsigned int buf_size; 4954 unsigned int next_cmd; 4955 struct mid_q_entry *mid_entry; 4956 int next_is_large; 4957 char *next_buffer = NULL; 4958 4959 *num_mids = 0; 4960 4961 /* switch to large buffer if too big for a small one */ 4962 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { 4963 server->large_buf = true; 4964 memcpy(server->bigbuf, buf, server->total_read); 4965 buf = server->bigbuf; 4966 } 4967 4968 /* now read the rest */ 4969 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, 4970 pdu_length - HEADER_SIZE(server) + 1); 4971 if (length < 0) 4972 return length; 4973 server->total_read += length; 4974 4975 buf_size = pdu_length - sizeof(struct smb2_transform_hdr); 4976 length = decrypt_raw_data(server, buf, buf_size, NULL, false); 4977 if (length) 4978 return length; 4979 4980 next_is_large = server->large_buf; 4981 one_more: 4982 shdr = (struct smb2_hdr *)buf; 4983 next_cmd = le32_to_cpu(shdr->NextCommand); 4984 if (next_cmd) { 4985 if (WARN_ON_ONCE(next_cmd > pdu_length)) 4986 return -1; 4987 if (next_is_large) 4988 next_buffer = (char *)cifs_buf_get(); 4989 else 4990 next_buffer = (char *)cifs_small_buf_get(); 4991 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); 4992 } 4993 4994 mid_entry = smb2_find_mid(server, buf); 4995 if (mid_entry == NULL) 4996 cifs_dbg(FYI, "mid not found\n"); 4997 else { 4998 cifs_dbg(FYI, "mid found\n"); 4999 mid_entry->decrypted = true; 5000 mid_entry->resp_buf_size = server->pdu_size; 5001 } 5002 5003 if (*num_mids >= MAX_COMPOUND) { 5004 cifs_server_dbg(VFS, "too many PDUs in compound\n"); 5005 return -1; 5006 } 5007 bufs[*num_mids] = buf; 5008 mids[(*num_mids)++] = mid_entry; 5009 5010 if (mid_entry && mid_entry->handle) 5011 ret = mid_entry->handle(server, mid_entry); 5012 else 5013 ret = cifs_handle_standard(server, mid_entry); 5014 5015 if (ret == 0 && next_cmd) { 5016 pdu_length -= next_cmd; 5017 server->large_buf = next_is_large; 5018 if (next_is_large) 5019 server->bigbuf = buf = next_buffer; 5020 else 5021 server->smallbuf = buf = next_buffer; 5022 goto one_more; 5023 } else if (ret != 0) { 5024 /* 5025 * ret != 0 here means that we didn't get to handle_mid() thus 5026 * server->smallbuf and server->bigbuf are still valid. We need 5027 * to free next_buffer because it is not going to be used 5028 * anywhere. 5029 */ 5030 if (next_is_large) 5031 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); 5032 else 5033 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); 5034 } 5035 5036 return ret; 5037 } 5038 5039 static int 5040 smb3_receive_transform(struct TCP_Server_Info *server, 5041 struct mid_q_entry **mids, char **bufs, int *num_mids) 5042 { 5043 char *buf = server->smallbuf; 5044 unsigned int pdu_length = server->pdu_size; 5045 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; 5046 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); 5047 5048 if (pdu_length < sizeof(struct smb2_transform_hdr) + 5049 sizeof(struct smb2_hdr)) { 5050 cifs_server_dbg(VFS, "Transform message is too small (%u)\n", 5051 pdu_length); 5052 cifs_reconnect(server, true); 5053 return -ECONNABORTED; 5054 } 5055 5056 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { 5057 cifs_server_dbg(VFS, "Transform message is broken\n"); 5058 cifs_reconnect(server, true); 5059 return -ECONNABORTED; 5060 } 5061 5062 /* TODO: add support for compounds containing READ. */ 5063 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { 5064 return receive_encrypted_read(server, &mids[0], num_mids); 5065 } 5066 5067 return receive_encrypted_standard(server, mids, bufs, num_mids); 5068 } 5069 5070 int 5071 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) 5072 { 5073 char *buf = server->large_buf ? server->bigbuf : server->smallbuf; 5074 5075 return handle_read_data(server, mid, buf, server->pdu_size, 5076 NULL, 0, false); 5077 } 5078 5079 static int smb2_next_header(struct TCP_Server_Info *server, char *buf, 5080 unsigned int *noff) 5081 { 5082 struct smb2_hdr *hdr = (struct smb2_hdr *)buf; 5083 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; 5084 5085 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { 5086 *noff = le32_to_cpu(t_hdr->OriginalMessageSize); 5087 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) 5088 return -EINVAL; 5089 } else { 5090 *noff = le32_to_cpu(hdr->NextCommand); 5091 } 5092 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) 5093 return -EINVAL; 5094 return 0; 5095 } 5096 5097 int cifs_sfu_make_node(unsigned int xid, struct inode *inode, 5098 struct dentry *dentry, struct cifs_tcon *tcon, 5099 const char *full_path, umode_t mode, dev_t dev) 5100 { 5101 struct cifs_open_info_data buf = {}; 5102 struct TCP_Server_Info *server = tcon->ses->server; 5103 struct cifs_open_parms oparms; 5104 struct cifs_io_parms io_parms = {}; 5105 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5106 struct cifs_fid fid; 5107 unsigned int bytes_written; 5108 struct win_dev *pdev; 5109 struct kvec iov[2]; 5110 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; 5111 int rc; 5112 5113 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) 5114 return -EPERM; 5115 5116 oparms = (struct cifs_open_parms) { 5117 .tcon = tcon, 5118 .cifs_sb = cifs_sb, 5119 .desired_access = GENERIC_WRITE, 5120 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | 5121 CREATE_OPTION_SPECIAL), 5122 .disposition = FILE_CREATE, 5123 .path = full_path, 5124 .fid = &fid, 5125 }; 5126 5127 rc = server->ops->open(xid, &oparms, &oplock, &buf); 5128 if (rc) 5129 return rc; 5130 5131 /* 5132 * BB Do not bother to decode buf since no local inode yet to put 5133 * timestamps in, but we can reuse it safely. 5134 */ 5135 pdev = (struct win_dev *)&buf.fi; 5136 io_parms.pid = current->tgid; 5137 io_parms.tcon = tcon; 5138 io_parms.length = sizeof(*pdev); 5139 iov[1].iov_base = pdev; 5140 iov[1].iov_len = sizeof(*pdev); 5141 if (S_ISCHR(mode)) { 5142 memcpy(pdev->type, "IntxCHR", 8); 5143 pdev->major = cpu_to_le64(MAJOR(dev)); 5144 pdev->minor = cpu_to_le64(MINOR(dev)); 5145 } else if (S_ISBLK(mode)) { 5146 memcpy(pdev->type, "IntxBLK", 8); 5147 pdev->major = cpu_to_le64(MAJOR(dev)); 5148 pdev->minor = cpu_to_le64(MINOR(dev)); 5149 } else if (S_ISFIFO(mode)) { 5150 memcpy(pdev->type, "LnxFIFO", 8); 5151 } 5152 5153 rc = server->ops->sync_write(xid, &fid, &io_parms, 5154 &bytes_written, iov, 1); 5155 server->ops->close(xid, tcon, &fid); 5156 d_drop(dentry); 5157 /* FIXME: add code here to set EAs */ 5158 cifs_free_open_info(&buf); 5159 return rc; 5160 } 5161 5162 static int smb2_make_node(unsigned int xid, struct inode *inode, 5163 struct dentry *dentry, struct cifs_tcon *tcon, 5164 const char *full_path, umode_t mode, dev_t dev) 5165 { 5166 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 5167 5168 /* 5169 * Check if mounted with mount parm 'sfu' mount parm. 5170 * SFU emulation should work with all servers, but only 5171 * supports block and char device (no socket & fifo), 5172 * and was used by default in earlier versions of Windows 5173 */ 5174 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) 5175 return -EPERM; 5176 /* 5177 * TODO: Add ability to create instead via reparse point. Windows (e.g. 5178 * their current NFS server) uses this approach to expose special files 5179 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions 5180 */ 5181 return cifs_sfu_make_node(xid, inode, dentry, tcon, 5182 full_path, mode, dev); 5183 } 5184 5185 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5186 struct smb_version_operations smb20_operations = { 5187 .compare_fids = smb2_compare_fids, 5188 .setup_request = smb2_setup_request, 5189 .setup_async_request = smb2_setup_async_request, 5190 .check_receive = smb2_check_receive, 5191 .add_credits = smb2_add_credits, 5192 .set_credits = smb2_set_credits, 5193 .get_credits_field = smb2_get_credits_field, 5194 .get_credits = smb2_get_credits, 5195 .wait_mtu_credits = cifs_wait_mtu_credits, 5196 .get_next_mid = smb2_get_next_mid, 5197 .revert_current_mid = smb2_revert_current_mid, 5198 .read_data_offset = smb2_read_data_offset, 5199 .read_data_length = smb2_read_data_length, 5200 .map_error = map_smb2_to_linux_error, 5201 .find_mid = smb2_find_mid, 5202 .check_message = smb2_check_message, 5203 .dump_detail = smb2_dump_detail, 5204 .clear_stats = smb2_clear_stats, 5205 .print_stats = smb2_print_stats, 5206 .is_oplock_break = smb2_is_valid_oplock_break, 5207 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5208 .downgrade_oplock = smb2_downgrade_oplock, 5209 .need_neg = smb2_need_neg, 5210 .negotiate = smb2_negotiate, 5211 .negotiate_wsize = smb2_negotiate_wsize, 5212 .negotiate_rsize = smb2_negotiate_rsize, 5213 .sess_setup = SMB2_sess_setup, 5214 .logoff = SMB2_logoff, 5215 .tree_connect = SMB2_tcon, 5216 .tree_disconnect = SMB2_tdis, 5217 .qfs_tcon = smb2_qfs_tcon, 5218 .is_path_accessible = smb2_is_path_accessible, 5219 .can_echo = smb2_can_echo, 5220 .echo = SMB2_echo, 5221 .query_path_info = smb2_query_path_info, 5222 .query_reparse_point = smb2_query_reparse_point, 5223 .get_srv_inum = smb2_get_srv_inum, 5224 .query_file_info = smb2_query_file_info, 5225 .set_path_size = smb2_set_path_size, 5226 .set_file_size = smb2_set_file_size, 5227 .set_file_info = smb2_set_file_info, 5228 .set_compression = smb2_set_compression, 5229 .mkdir = smb2_mkdir, 5230 .mkdir_setinfo = smb2_mkdir_setinfo, 5231 .rmdir = smb2_rmdir, 5232 .unlink = smb2_unlink, 5233 .rename = smb2_rename_path, 5234 .create_hardlink = smb2_create_hardlink, 5235 .parse_reparse_point = smb2_parse_reparse_point, 5236 .query_mf_symlink = smb3_query_mf_symlink, 5237 .create_mf_symlink = smb3_create_mf_symlink, 5238 .open = smb2_open_file, 5239 .set_fid = smb2_set_fid, 5240 .close = smb2_close_file, 5241 .flush = smb2_flush_file, 5242 .async_readv = smb2_async_readv, 5243 .async_writev = smb2_async_writev, 5244 .sync_read = smb2_sync_read, 5245 .sync_write = smb2_sync_write, 5246 .query_dir_first = smb2_query_dir_first, 5247 .query_dir_next = smb2_query_dir_next, 5248 .close_dir = smb2_close_dir, 5249 .calc_smb_size = smb2_calc_size, 5250 .is_status_pending = smb2_is_status_pending, 5251 .is_session_expired = smb2_is_session_expired, 5252 .oplock_response = smb2_oplock_response, 5253 .queryfs = smb2_queryfs, 5254 .mand_lock = smb2_mand_lock, 5255 .mand_unlock_range = smb2_unlock_range, 5256 .push_mand_locks = smb2_push_mandatory_locks, 5257 .get_lease_key = smb2_get_lease_key, 5258 .set_lease_key = smb2_set_lease_key, 5259 .new_lease_key = smb2_new_lease_key, 5260 .calc_signature = smb2_calc_signature, 5261 .is_read_op = smb2_is_read_op, 5262 .set_oplock_level = smb2_set_oplock_level, 5263 .create_lease_buf = smb2_create_lease_buf, 5264 .parse_lease_buf = smb2_parse_lease_buf, 5265 .copychunk_range = smb2_copychunk_range, 5266 .wp_retry_size = smb2_wp_retry_size, 5267 .dir_needs_close = smb2_dir_needs_close, 5268 .get_dfs_refer = smb2_get_dfs_refer, 5269 .select_sectype = smb2_select_sectype, 5270 #ifdef CONFIG_CIFS_XATTR 5271 .query_all_EAs = smb2_query_eas, 5272 .set_EA = smb2_set_ea, 5273 #endif /* CIFS_XATTR */ 5274 .get_acl = get_smb2_acl, 5275 .get_acl_by_fid = get_smb2_acl_by_fid, 5276 .set_acl = set_smb2_acl, 5277 .next_header = smb2_next_header, 5278 .ioctl_query_info = smb2_ioctl_query_info, 5279 .make_node = smb2_make_node, 5280 .fiemap = smb3_fiemap, 5281 .llseek = smb3_llseek, 5282 .is_status_io_timeout = smb2_is_status_io_timeout, 5283 .is_network_name_deleted = smb2_is_network_name_deleted, 5284 }; 5285 #endif /* CIFS_ALLOW_INSECURE_LEGACY */ 5286 5287 struct smb_version_operations smb21_operations = { 5288 .compare_fids = smb2_compare_fids, 5289 .setup_request = smb2_setup_request, 5290 .setup_async_request = smb2_setup_async_request, 5291 .check_receive = smb2_check_receive, 5292 .add_credits = smb2_add_credits, 5293 .set_credits = smb2_set_credits, 5294 .get_credits_field = smb2_get_credits_field, 5295 .get_credits = smb2_get_credits, 5296 .wait_mtu_credits = smb2_wait_mtu_credits, 5297 .adjust_credits = smb2_adjust_credits, 5298 .get_next_mid = smb2_get_next_mid, 5299 .revert_current_mid = smb2_revert_current_mid, 5300 .read_data_offset = smb2_read_data_offset, 5301 .read_data_length = smb2_read_data_length, 5302 .map_error = map_smb2_to_linux_error, 5303 .find_mid = smb2_find_mid, 5304 .check_message = smb2_check_message, 5305 .dump_detail = smb2_dump_detail, 5306 .clear_stats = smb2_clear_stats, 5307 .print_stats = smb2_print_stats, 5308 .is_oplock_break = smb2_is_valid_oplock_break, 5309 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5310 .downgrade_oplock = smb2_downgrade_oplock, 5311 .need_neg = smb2_need_neg, 5312 .negotiate = smb2_negotiate, 5313 .negotiate_wsize = smb2_negotiate_wsize, 5314 .negotiate_rsize = smb2_negotiate_rsize, 5315 .sess_setup = SMB2_sess_setup, 5316 .logoff = SMB2_logoff, 5317 .tree_connect = SMB2_tcon, 5318 .tree_disconnect = SMB2_tdis, 5319 .qfs_tcon = smb2_qfs_tcon, 5320 .is_path_accessible = smb2_is_path_accessible, 5321 .can_echo = smb2_can_echo, 5322 .echo = SMB2_echo, 5323 .query_path_info = smb2_query_path_info, 5324 .query_reparse_point = smb2_query_reparse_point, 5325 .get_srv_inum = smb2_get_srv_inum, 5326 .query_file_info = smb2_query_file_info, 5327 .set_path_size = smb2_set_path_size, 5328 .set_file_size = smb2_set_file_size, 5329 .set_file_info = smb2_set_file_info, 5330 .set_compression = smb2_set_compression, 5331 .mkdir = smb2_mkdir, 5332 .mkdir_setinfo = smb2_mkdir_setinfo, 5333 .rmdir = smb2_rmdir, 5334 .unlink = smb2_unlink, 5335 .rename = smb2_rename_path, 5336 .create_hardlink = smb2_create_hardlink, 5337 .parse_reparse_point = smb2_parse_reparse_point, 5338 .query_mf_symlink = smb3_query_mf_symlink, 5339 .create_mf_symlink = smb3_create_mf_symlink, 5340 .open = smb2_open_file, 5341 .set_fid = smb2_set_fid, 5342 .close = smb2_close_file, 5343 .flush = smb2_flush_file, 5344 .async_readv = smb2_async_readv, 5345 .async_writev = smb2_async_writev, 5346 .sync_read = smb2_sync_read, 5347 .sync_write = smb2_sync_write, 5348 .query_dir_first = smb2_query_dir_first, 5349 .query_dir_next = smb2_query_dir_next, 5350 .close_dir = smb2_close_dir, 5351 .calc_smb_size = smb2_calc_size, 5352 .is_status_pending = smb2_is_status_pending, 5353 .is_session_expired = smb2_is_session_expired, 5354 .oplock_response = smb2_oplock_response, 5355 .queryfs = smb2_queryfs, 5356 .mand_lock = smb2_mand_lock, 5357 .mand_unlock_range = smb2_unlock_range, 5358 .push_mand_locks = smb2_push_mandatory_locks, 5359 .get_lease_key = smb2_get_lease_key, 5360 .set_lease_key = smb2_set_lease_key, 5361 .new_lease_key = smb2_new_lease_key, 5362 .calc_signature = smb2_calc_signature, 5363 .is_read_op = smb21_is_read_op, 5364 .set_oplock_level = smb21_set_oplock_level, 5365 .create_lease_buf = smb2_create_lease_buf, 5366 .parse_lease_buf = smb2_parse_lease_buf, 5367 .copychunk_range = smb2_copychunk_range, 5368 .wp_retry_size = smb2_wp_retry_size, 5369 .dir_needs_close = smb2_dir_needs_close, 5370 .enum_snapshots = smb3_enum_snapshots, 5371 .notify = smb3_notify, 5372 .get_dfs_refer = smb2_get_dfs_refer, 5373 .select_sectype = smb2_select_sectype, 5374 #ifdef CONFIG_CIFS_XATTR 5375 .query_all_EAs = smb2_query_eas, 5376 .set_EA = smb2_set_ea, 5377 #endif /* CIFS_XATTR */ 5378 .get_acl = get_smb2_acl, 5379 .get_acl_by_fid = get_smb2_acl_by_fid, 5380 .set_acl = set_smb2_acl, 5381 .next_header = smb2_next_header, 5382 .ioctl_query_info = smb2_ioctl_query_info, 5383 .make_node = smb2_make_node, 5384 .fiemap = smb3_fiemap, 5385 .llseek = smb3_llseek, 5386 .is_status_io_timeout = smb2_is_status_io_timeout, 5387 .is_network_name_deleted = smb2_is_network_name_deleted, 5388 }; 5389 5390 struct smb_version_operations smb30_operations = { 5391 .compare_fids = smb2_compare_fids, 5392 .setup_request = smb2_setup_request, 5393 .setup_async_request = smb2_setup_async_request, 5394 .check_receive = smb2_check_receive, 5395 .add_credits = smb2_add_credits, 5396 .set_credits = smb2_set_credits, 5397 .get_credits_field = smb2_get_credits_field, 5398 .get_credits = smb2_get_credits, 5399 .wait_mtu_credits = smb2_wait_mtu_credits, 5400 .adjust_credits = smb2_adjust_credits, 5401 .get_next_mid = smb2_get_next_mid, 5402 .revert_current_mid = smb2_revert_current_mid, 5403 .read_data_offset = smb2_read_data_offset, 5404 .read_data_length = smb2_read_data_length, 5405 .map_error = map_smb2_to_linux_error, 5406 .find_mid = smb2_find_mid, 5407 .check_message = smb2_check_message, 5408 .dump_detail = smb2_dump_detail, 5409 .clear_stats = smb2_clear_stats, 5410 .print_stats = smb2_print_stats, 5411 .dump_share_caps = smb2_dump_share_caps, 5412 .is_oplock_break = smb2_is_valid_oplock_break, 5413 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5414 .downgrade_oplock = smb3_downgrade_oplock, 5415 .need_neg = smb2_need_neg, 5416 .negotiate = smb2_negotiate, 5417 .negotiate_wsize = smb3_negotiate_wsize, 5418 .negotiate_rsize = smb3_negotiate_rsize, 5419 .sess_setup = SMB2_sess_setup, 5420 .logoff = SMB2_logoff, 5421 .tree_connect = SMB2_tcon, 5422 .tree_disconnect = SMB2_tdis, 5423 .qfs_tcon = smb3_qfs_tcon, 5424 .is_path_accessible = smb2_is_path_accessible, 5425 .can_echo = smb2_can_echo, 5426 .echo = SMB2_echo, 5427 .query_path_info = smb2_query_path_info, 5428 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ 5429 .query_reparse_point = smb2_query_reparse_point, 5430 .get_srv_inum = smb2_get_srv_inum, 5431 .query_file_info = smb2_query_file_info, 5432 .set_path_size = smb2_set_path_size, 5433 .set_file_size = smb2_set_file_size, 5434 .set_file_info = smb2_set_file_info, 5435 .set_compression = smb2_set_compression, 5436 .mkdir = smb2_mkdir, 5437 .mkdir_setinfo = smb2_mkdir_setinfo, 5438 .rmdir = smb2_rmdir, 5439 .unlink = smb2_unlink, 5440 .rename = smb2_rename_path, 5441 .create_hardlink = smb2_create_hardlink, 5442 .parse_reparse_point = smb2_parse_reparse_point, 5443 .query_mf_symlink = smb3_query_mf_symlink, 5444 .create_mf_symlink = smb3_create_mf_symlink, 5445 .open = smb2_open_file, 5446 .set_fid = smb2_set_fid, 5447 .close = smb2_close_file, 5448 .close_getattr = smb2_close_getattr, 5449 .flush = smb2_flush_file, 5450 .async_readv = smb2_async_readv, 5451 .async_writev = smb2_async_writev, 5452 .sync_read = smb2_sync_read, 5453 .sync_write = smb2_sync_write, 5454 .query_dir_first = smb2_query_dir_first, 5455 .query_dir_next = smb2_query_dir_next, 5456 .close_dir = smb2_close_dir, 5457 .calc_smb_size = smb2_calc_size, 5458 .is_status_pending = smb2_is_status_pending, 5459 .is_session_expired = smb2_is_session_expired, 5460 .oplock_response = smb2_oplock_response, 5461 .queryfs = smb2_queryfs, 5462 .mand_lock = smb2_mand_lock, 5463 .mand_unlock_range = smb2_unlock_range, 5464 .push_mand_locks = smb2_push_mandatory_locks, 5465 .get_lease_key = smb2_get_lease_key, 5466 .set_lease_key = smb2_set_lease_key, 5467 .new_lease_key = smb2_new_lease_key, 5468 .generate_signingkey = generate_smb30signingkey, 5469 .calc_signature = smb3_calc_signature, 5470 .set_integrity = smb3_set_integrity, 5471 .is_read_op = smb21_is_read_op, 5472 .set_oplock_level = smb3_set_oplock_level, 5473 .create_lease_buf = smb3_create_lease_buf, 5474 .parse_lease_buf = smb3_parse_lease_buf, 5475 .copychunk_range = smb2_copychunk_range, 5476 .duplicate_extents = smb2_duplicate_extents, 5477 .validate_negotiate = smb3_validate_negotiate, 5478 .wp_retry_size = smb2_wp_retry_size, 5479 .dir_needs_close = smb2_dir_needs_close, 5480 .fallocate = smb3_fallocate, 5481 .enum_snapshots = smb3_enum_snapshots, 5482 .notify = smb3_notify, 5483 .init_transform_rq = smb3_init_transform_rq, 5484 .is_transform_hdr = smb3_is_transform_hdr, 5485 .receive_transform = smb3_receive_transform, 5486 .get_dfs_refer = smb2_get_dfs_refer, 5487 .select_sectype = smb2_select_sectype, 5488 #ifdef CONFIG_CIFS_XATTR 5489 .query_all_EAs = smb2_query_eas, 5490 .set_EA = smb2_set_ea, 5491 #endif /* CIFS_XATTR */ 5492 .get_acl = get_smb2_acl, 5493 .get_acl_by_fid = get_smb2_acl_by_fid, 5494 .set_acl = set_smb2_acl, 5495 .next_header = smb2_next_header, 5496 .ioctl_query_info = smb2_ioctl_query_info, 5497 .make_node = smb2_make_node, 5498 .fiemap = smb3_fiemap, 5499 .llseek = smb3_llseek, 5500 .is_status_io_timeout = smb2_is_status_io_timeout, 5501 .is_network_name_deleted = smb2_is_network_name_deleted, 5502 }; 5503 5504 struct smb_version_operations smb311_operations = { 5505 .compare_fids = smb2_compare_fids, 5506 .setup_request = smb2_setup_request, 5507 .setup_async_request = smb2_setup_async_request, 5508 .check_receive = smb2_check_receive, 5509 .add_credits = smb2_add_credits, 5510 .set_credits = smb2_set_credits, 5511 .get_credits_field = smb2_get_credits_field, 5512 .get_credits = smb2_get_credits, 5513 .wait_mtu_credits = smb2_wait_mtu_credits, 5514 .adjust_credits = smb2_adjust_credits, 5515 .get_next_mid = smb2_get_next_mid, 5516 .revert_current_mid = smb2_revert_current_mid, 5517 .read_data_offset = smb2_read_data_offset, 5518 .read_data_length = smb2_read_data_length, 5519 .map_error = map_smb2_to_linux_error, 5520 .find_mid = smb2_find_mid, 5521 .check_message = smb2_check_message, 5522 .dump_detail = smb2_dump_detail, 5523 .clear_stats = smb2_clear_stats, 5524 .print_stats = smb2_print_stats, 5525 .dump_share_caps = smb2_dump_share_caps, 5526 .is_oplock_break = smb2_is_valid_oplock_break, 5527 .handle_cancelled_mid = smb2_handle_cancelled_mid, 5528 .downgrade_oplock = smb3_downgrade_oplock, 5529 .need_neg = smb2_need_neg, 5530 .negotiate = smb2_negotiate, 5531 .negotiate_wsize = smb3_negotiate_wsize, 5532 .negotiate_rsize = smb3_negotiate_rsize, 5533 .sess_setup = SMB2_sess_setup, 5534 .logoff = SMB2_logoff, 5535 .tree_connect = SMB2_tcon, 5536 .tree_disconnect = SMB2_tdis, 5537 .qfs_tcon = smb3_qfs_tcon, 5538 .is_path_accessible = smb2_is_path_accessible, 5539 .can_echo = smb2_can_echo, 5540 .echo = SMB2_echo, 5541 .query_path_info = smb2_query_path_info, 5542 .query_reparse_point = smb2_query_reparse_point, 5543 .get_srv_inum = smb2_get_srv_inum, 5544 .query_file_info = smb2_query_file_info, 5545 .set_path_size = smb2_set_path_size, 5546 .set_file_size = smb2_set_file_size, 5547 .set_file_info = smb2_set_file_info, 5548 .set_compression = smb2_set_compression, 5549 .mkdir = smb2_mkdir, 5550 .mkdir_setinfo = smb2_mkdir_setinfo, 5551 .posix_mkdir = smb311_posix_mkdir, 5552 .rmdir = smb2_rmdir, 5553 .unlink = smb2_unlink, 5554 .rename = smb2_rename_path, 5555 .create_hardlink = smb2_create_hardlink, 5556 .parse_reparse_point = smb2_parse_reparse_point, 5557 .query_mf_symlink = smb3_query_mf_symlink, 5558 .create_mf_symlink = smb3_create_mf_symlink, 5559 .open = smb2_open_file, 5560 .set_fid = smb2_set_fid, 5561 .close = smb2_close_file, 5562 .close_getattr = smb2_close_getattr, 5563 .flush = smb2_flush_file, 5564 .async_readv = smb2_async_readv, 5565 .async_writev = smb2_async_writev, 5566 .sync_read = smb2_sync_read, 5567 .sync_write = smb2_sync_write, 5568 .query_dir_first = smb2_query_dir_first, 5569 .query_dir_next = smb2_query_dir_next, 5570 .close_dir = smb2_close_dir, 5571 .calc_smb_size = smb2_calc_size, 5572 .is_status_pending = smb2_is_status_pending, 5573 .is_session_expired = smb2_is_session_expired, 5574 .oplock_response = smb2_oplock_response, 5575 .queryfs = smb311_queryfs, 5576 .mand_lock = smb2_mand_lock, 5577 .mand_unlock_range = smb2_unlock_range, 5578 .push_mand_locks = smb2_push_mandatory_locks, 5579 .get_lease_key = smb2_get_lease_key, 5580 .set_lease_key = smb2_set_lease_key, 5581 .new_lease_key = smb2_new_lease_key, 5582 .generate_signingkey = generate_smb311signingkey, 5583 .calc_signature = smb3_calc_signature, 5584 .set_integrity = smb3_set_integrity, 5585 .is_read_op = smb21_is_read_op, 5586 .set_oplock_level = smb3_set_oplock_level, 5587 .create_lease_buf = smb3_create_lease_buf, 5588 .parse_lease_buf = smb3_parse_lease_buf, 5589 .copychunk_range = smb2_copychunk_range, 5590 .duplicate_extents = smb2_duplicate_extents, 5591 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ 5592 .wp_retry_size = smb2_wp_retry_size, 5593 .dir_needs_close = smb2_dir_needs_close, 5594 .fallocate = smb3_fallocate, 5595 .enum_snapshots = smb3_enum_snapshots, 5596 .notify = smb3_notify, 5597 .init_transform_rq = smb3_init_transform_rq, 5598 .is_transform_hdr = smb3_is_transform_hdr, 5599 .receive_transform = smb3_receive_transform, 5600 .get_dfs_refer = smb2_get_dfs_refer, 5601 .select_sectype = smb2_select_sectype, 5602 #ifdef CONFIG_CIFS_XATTR 5603 .query_all_EAs = smb2_query_eas, 5604 .set_EA = smb2_set_ea, 5605 #endif /* CIFS_XATTR */ 5606 .get_acl = get_smb2_acl, 5607 .get_acl_by_fid = get_smb2_acl_by_fid, 5608 .set_acl = set_smb2_acl, 5609 .next_header = smb2_next_header, 5610 .ioctl_query_info = smb2_ioctl_query_info, 5611 .make_node = smb2_make_node, 5612 .fiemap = smb3_fiemap, 5613 .llseek = smb3_llseek, 5614 .is_status_io_timeout = smb2_is_status_io_timeout, 5615 .is_network_name_deleted = smb2_is_network_name_deleted, 5616 }; 5617 5618 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 5619 struct smb_version_values smb20_values = { 5620 .version_string = SMB20_VERSION_STRING, 5621 .protocol_id = SMB20_PROT_ID, 5622 .req_capabilities = 0, /* MBZ */ 5623 .large_lock_type = 0, 5624 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5625 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5626 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5627 .header_size = sizeof(struct smb2_hdr), 5628 .header_preamble_size = 0, 5629 .max_header_size = MAX_SMB2_HDR_SIZE, 5630 .read_rsp_size = sizeof(struct smb2_read_rsp), 5631 .lock_cmd = SMB2_LOCK, 5632 .cap_unix = 0, 5633 .cap_nt_find = SMB2_NT_FIND, 5634 .cap_large_files = SMB2_LARGE_FILES, 5635 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5636 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5637 .create_lease_size = sizeof(struct create_lease), 5638 }; 5639 #endif /* ALLOW_INSECURE_LEGACY */ 5640 5641 struct smb_version_values smb21_values = { 5642 .version_string = SMB21_VERSION_STRING, 5643 .protocol_id = SMB21_PROT_ID, 5644 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ 5645 .large_lock_type = 0, 5646 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5647 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5648 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5649 .header_size = sizeof(struct smb2_hdr), 5650 .header_preamble_size = 0, 5651 .max_header_size = MAX_SMB2_HDR_SIZE, 5652 .read_rsp_size = sizeof(struct smb2_read_rsp), 5653 .lock_cmd = SMB2_LOCK, 5654 .cap_unix = 0, 5655 .cap_nt_find = SMB2_NT_FIND, 5656 .cap_large_files = SMB2_LARGE_FILES, 5657 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5658 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5659 .create_lease_size = sizeof(struct create_lease), 5660 }; 5661 5662 struct smb_version_values smb3any_values = { 5663 .version_string = SMB3ANY_VERSION_STRING, 5664 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5665 .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, 5666 .large_lock_type = 0, 5667 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5668 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5669 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5670 .header_size = sizeof(struct smb2_hdr), 5671 .header_preamble_size = 0, 5672 .max_header_size = MAX_SMB2_HDR_SIZE, 5673 .read_rsp_size = sizeof(struct smb2_read_rsp), 5674 .lock_cmd = SMB2_LOCK, 5675 .cap_unix = 0, 5676 .cap_nt_find = SMB2_NT_FIND, 5677 .cap_large_files = SMB2_LARGE_FILES, 5678 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5679 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5680 .create_lease_size = sizeof(struct create_lease_v2), 5681 }; 5682 5683 struct smb_version_values smbdefault_values = { 5684 .version_string = SMBDEFAULT_VERSION_STRING, 5685 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ 5686 .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, 5687 .large_lock_type = 0, 5688 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5689 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5690 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5691 .header_size = sizeof(struct smb2_hdr), 5692 .header_preamble_size = 0, 5693 .max_header_size = MAX_SMB2_HDR_SIZE, 5694 .read_rsp_size = sizeof(struct smb2_read_rsp), 5695 .lock_cmd = SMB2_LOCK, 5696 .cap_unix = 0, 5697 .cap_nt_find = SMB2_NT_FIND, 5698 .cap_large_files = SMB2_LARGE_FILES, 5699 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5700 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5701 .create_lease_size = sizeof(struct create_lease_v2), 5702 }; 5703 5704 struct smb_version_values smb30_values = { 5705 .version_string = SMB30_VERSION_STRING, 5706 .protocol_id = SMB30_PROT_ID, 5707 .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, 5708 .large_lock_type = 0, 5709 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5710 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5711 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5712 .header_size = sizeof(struct smb2_hdr), 5713 .header_preamble_size = 0, 5714 .max_header_size = MAX_SMB2_HDR_SIZE, 5715 .read_rsp_size = sizeof(struct smb2_read_rsp), 5716 .lock_cmd = SMB2_LOCK, 5717 .cap_unix = 0, 5718 .cap_nt_find = SMB2_NT_FIND, 5719 .cap_large_files = SMB2_LARGE_FILES, 5720 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5721 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5722 .create_lease_size = sizeof(struct create_lease_v2), 5723 }; 5724 5725 struct smb_version_values smb302_values = { 5726 .version_string = SMB302_VERSION_STRING, 5727 .protocol_id = SMB302_PROT_ID, 5728 .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, 5729 .large_lock_type = 0, 5730 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5731 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5732 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5733 .header_size = sizeof(struct smb2_hdr), 5734 .header_preamble_size = 0, 5735 .max_header_size = MAX_SMB2_HDR_SIZE, 5736 .read_rsp_size = sizeof(struct smb2_read_rsp), 5737 .lock_cmd = SMB2_LOCK, 5738 .cap_unix = 0, 5739 .cap_nt_find = SMB2_NT_FIND, 5740 .cap_large_files = SMB2_LARGE_FILES, 5741 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5742 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5743 .create_lease_size = sizeof(struct create_lease_v2), 5744 }; 5745 5746 struct smb_version_values smb311_values = { 5747 .version_string = SMB311_VERSION_STRING, 5748 .protocol_id = SMB311_PROT_ID, 5749 .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, 5750 .large_lock_type = 0, 5751 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, 5752 .shared_lock_type = SMB2_LOCKFLAG_SHARED, 5753 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, 5754 .header_size = sizeof(struct smb2_hdr), 5755 .header_preamble_size = 0, 5756 .max_header_size = MAX_SMB2_HDR_SIZE, 5757 .read_rsp_size = sizeof(struct smb2_read_rsp), 5758 .lock_cmd = SMB2_LOCK, 5759 .cap_unix = 0, 5760 .cap_nt_find = SMB2_NT_FIND, 5761 .cap_large_files = SMB2_LARGE_FILES, 5762 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, 5763 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, 5764 .create_lease_size = sizeof(struct create_lease_v2), 5765 }; 5766