1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 4 */ 5 6 #include <linux/jhash.h> 7 #include <linux/slab.h> 8 #include <linux/rwsem.h> 9 #include <linux/mutex.h> 10 #include <linux/wait.h> 11 #include <linux/hashtable.h> 12 #include <net/net_namespace.h> 13 #include <net/genetlink.h> 14 #include <linux/socket.h> 15 #include <linux/workqueue.h> 16 17 #include "vfs_cache.h" 18 #include "transport_ipc.h" 19 #include "server.h" 20 #include "smb_common.h" 21 22 #include "mgmt/user_config.h" 23 #include "mgmt/share_config.h" 24 #include "mgmt/user_session.h" 25 #include "mgmt/tree_connect.h" 26 #include "mgmt/ksmbd_ida.h" 27 #include "connection.h" 28 #include "transport_tcp.h" 29 #include "transport_rdma.h" 30 31 #define IPC_WAIT_TIMEOUT (2 * HZ) 32 33 #define IPC_MSG_HASH_BITS 3 34 static DEFINE_HASHTABLE(ipc_msg_table, IPC_MSG_HASH_BITS); 35 static DECLARE_RWSEM(ipc_msg_table_lock); 36 static DEFINE_MUTEX(startup_lock); 37 38 static DEFINE_IDA(ipc_ida); 39 40 static unsigned int ksmbd_tools_pid; 41 42 static bool ksmbd_ipc_validate_version(struct genl_info *m) 43 { 44 if (m->genlhdr->version != KSMBD_GENL_VERSION) { 45 pr_err("%s. ksmbd: %d, kernel module: %d. %s.\n", 46 "Daemon and kernel module version mismatch", 47 m->genlhdr->version, 48 KSMBD_GENL_VERSION, 49 "User-space ksmbd should terminate"); 50 return false; 51 } 52 return true; 53 } 54 55 struct ksmbd_ipc_msg { 56 unsigned int type; 57 unsigned int sz; 58 unsigned char payload[]; 59 }; 60 61 struct ipc_msg_table_entry { 62 unsigned int handle; 63 unsigned int type; 64 wait_queue_head_t wait; 65 struct hlist_node ipc_table_hlist; 66 67 void *response; 68 unsigned int msg_sz; 69 }; 70 71 static struct delayed_work ipc_timer_work; 72 73 static int handle_startup_event(struct sk_buff *skb, struct genl_info *info); 74 static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info); 75 static int handle_generic_event(struct sk_buff *skb, struct genl_info *info); 76 static int ksmbd_ipc_heartbeat_request(void); 77 78 static const struct nla_policy ksmbd_nl_policy[KSMBD_EVENT_MAX + 1] = { 79 [KSMBD_EVENT_UNSPEC] = { 80 .len = 0, 81 }, 82 [KSMBD_EVENT_HEARTBEAT_REQUEST] = { 83 .len = sizeof(struct ksmbd_heartbeat), 84 }, 85 [KSMBD_EVENT_STARTING_UP] = { 86 .len = sizeof(struct ksmbd_startup_request), 87 }, 88 [KSMBD_EVENT_SHUTTING_DOWN] = { 89 .len = sizeof(struct ksmbd_shutdown_request), 90 }, 91 [KSMBD_EVENT_LOGIN_REQUEST] = { 92 .len = sizeof(struct ksmbd_login_request), 93 }, 94 [KSMBD_EVENT_LOGIN_RESPONSE] = { 95 .len = sizeof(struct ksmbd_login_response), 96 }, 97 [KSMBD_EVENT_SHARE_CONFIG_REQUEST] = { 98 .len = sizeof(struct ksmbd_share_config_request), 99 }, 100 [KSMBD_EVENT_SHARE_CONFIG_RESPONSE] = { 101 .len = sizeof(struct ksmbd_share_config_response), 102 }, 103 [KSMBD_EVENT_TREE_CONNECT_REQUEST] = { 104 .len = sizeof(struct ksmbd_tree_connect_request), 105 }, 106 [KSMBD_EVENT_TREE_CONNECT_RESPONSE] = { 107 .len = sizeof(struct ksmbd_tree_connect_response), 108 }, 109 [KSMBD_EVENT_TREE_DISCONNECT_REQUEST] = { 110 .len = sizeof(struct ksmbd_tree_disconnect_request), 111 }, 112 [KSMBD_EVENT_LOGOUT_REQUEST] = { 113 .len = sizeof(struct ksmbd_logout_request), 114 }, 115 [KSMBD_EVENT_RPC_REQUEST] = { 116 }, 117 [KSMBD_EVENT_RPC_RESPONSE] = { 118 }, 119 [KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST] = { 120 }, 121 [KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE] = { 122 }, 123 [KSMBD_EVENT_LOGIN_REQUEST_EXT] = { 124 .len = sizeof(struct ksmbd_login_request), 125 }, 126 [KSMBD_EVENT_LOGIN_RESPONSE_EXT] = { 127 .len = sizeof(struct ksmbd_login_response_ext), 128 }, 129 }; 130 131 static struct genl_ops ksmbd_genl_ops[] = { 132 { 133 .cmd = KSMBD_EVENT_UNSPEC, 134 .doit = handle_unsupported_event, 135 }, 136 { 137 .cmd = KSMBD_EVENT_HEARTBEAT_REQUEST, 138 .doit = handle_unsupported_event, 139 }, 140 { 141 .cmd = KSMBD_EVENT_STARTING_UP, 142 .doit = handle_startup_event, 143 }, 144 { 145 .cmd = KSMBD_EVENT_SHUTTING_DOWN, 146 .doit = handle_unsupported_event, 147 }, 148 { 149 .cmd = KSMBD_EVENT_LOGIN_REQUEST, 150 .doit = handle_unsupported_event, 151 }, 152 { 153 .cmd = KSMBD_EVENT_LOGIN_RESPONSE, 154 .doit = handle_generic_event, 155 }, 156 { 157 .cmd = KSMBD_EVENT_SHARE_CONFIG_REQUEST, 158 .doit = handle_unsupported_event, 159 }, 160 { 161 .cmd = KSMBD_EVENT_SHARE_CONFIG_RESPONSE, 162 .doit = handle_generic_event, 163 }, 164 { 165 .cmd = KSMBD_EVENT_TREE_CONNECT_REQUEST, 166 .doit = handle_unsupported_event, 167 }, 168 { 169 .cmd = KSMBD_EVENT_TREE_CONNECT_RESPONSE, 170 .doit = handle_generic_event, 171 }, 172 { 173 .cmd = KSMBD_EVENT_TREE_DISCONNECT_REQUEST, 174 .doit = handle_unsupported_event, 175 }, 176 { 177 .cmd = KSMBD_EVENT_LOGOUT_REQUEST, 178 .doit = handle_unsupported_event, 179 }, 180 { 181 .cmd = KSMBD_EVENT_RPC_REQUEST, 182 .doit = handle_unsupported_event, 183 }, 184 { 185 .cmd = KSMBD_EVENT_RPC_RESPONSE, 186 .doit = handle_generic_event, 187 }, 188 { 189 .cmd = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST, 190 .doit = handle_unsupported_event, 191 }, 192 { 193 .cmd = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE, 194 .doit = handle_generic_event, 195 }, 196 { 197 .cmd = KSMBD_EVENT_LOGIN_REQUEST_EXT, 198 .doit = handle_unsupported_event, 199 }, 200 { 201 .cmd = KSMBD_EVENT_LOGIN_RESPONSE_EXT, 202 .doit = handle_generic_event, 203 }, 204 }; 205 206 static struct genl_family ksmbd_genl_family = { 207 .name = KSMBD_GENL_NAME, 208 .version = KSMBD_GENL_VERSION, 209 .hdrsize = 0, 210 .maxattr = KSMBD_EVENT_MAX, 211 .netnsok = true, 212 .module = THIS_MODULE, 213 .ops = ksmbd_genl_ops, 214 .n_ops = ARRAY_SIZE(ksmbd_genl_ops), 215 .resv_start_op = KSMBD_EVENT_LOGIN_RESPONSE_EXT + 1, 216 }; 217 218 static void ksmbd_nl_init_fixup(void) 219 { 220 int i; 221 222 for (i = 0; i < ARRAY_SIZE(ksmbd_genl_ops); i++) 223 ksmbd_genl_ops[i].validate = GENL_DONT_VALIDATE_STRICT | 224 GENL_DONT_VALIDATE_DUMP; 225 226 ksmbd_genl_family.policy = ksmbd_nl_policy; 227 } 228 229 static int rpc_context_flags(struct ksmbd_session *sess) 230 { 231 if (user_guest(sess->user)) 232 return KSMBD_RPC_RESTRICTED_CONTEXT; 233 return 0; 234 } 235 236 static void ipc_update_last_active(void) 237 { 238 if (server_conf.ipc_timeout) 239 server_conf.ipc_last_active = jiffies; 240 } 241 242 static struct ksmbd_ipc_msg *ipc_msg_alloc(size_t sz) 243 { 244 struct ksmbd_ipc_msg *msg; 245 size_t msg_sz = sz + sizeof(struct ksmbd_ipc_msg); 246 247 msg = kvzalloc(msg_sz, KSMBD_DEFAULT_GFP); 248 if (msg) 249 msg->sz = sz; 250 return msg; 251 } 252 253 static void ipc_msg_free(struct ksmbd_ipc_msg *msg) 254 { 255 kvfree(msg); 256 } 257 258 static void ipc_msg_handle_free(int handle) 259 { 260 if (handle >= 0) 261 ksmbd_release_id(&ipc_ida, handle); 262 } 263 264 static int handle_response(int type, void *payload, size_t sz) 265 { 266 unsigned int handle = *(unsigned int *)payload; 267 struct ipc_msg_table_entry *entry; 268 int ret = 0; 269 270 ipc_update_last_active(); 271 down_read(&ipc_msg_table_lock); 272 hash_for_each_possible(ipc_msg_table, entry, ipc_table_hlist, handle) { 273 if (handle != entry->handle) 274 continue; 275 276 entry->response = NULL; 277 /* 278 * Response message type value should be equal to 279 * request message type + 1. 280 */ 281 if (entry->type + 1 != type) { 282 pr_err("Waiting for IPC type %d, got %d. Ignore.\n", 283 entry->type + 1, type); 284 continue; 285 } 286 287 entry->response = kvzalloc(sz, KSMBD_DEFAULT_GFP); 288 if (!entry->response) { 289 ret = -ENOMEM; 290 break; 291 } 292 293 memcpy(entry->response, payload, sz); 294 entry->msg_sz = sz; 295 wake_up_interruptible(&entry->wait); 296 ret = 0; 297 break; 298 } 299 up_read(&ipc_msg_table_lock); 300 301 return ret; 302 } 303 304 static int ipc_server_config_on_startup(struct ksmbd_startup_request *req) 305 { 306 int ret; 307 308 ksmbd_set_fd_limit(req->file_max); 309 server_conf.flags = req->flags; 310 server_conf.signing = req->signing; 311 server_conf.tcp_port = req->tcp_port; 312 server_conf.ipc_timeout = req->ipc_timeout * HZ; 313 if (check_mul_overflow(req->deadtime, SMB_ECHO_INTERVAL, 314 &server_conf.deadtime)) { 315 ret = -EINVAL; 316 goto out; 317 } 318 server_conf.share_fake_fscaps = req->share_fake_fscaps; 319 ksmbd_init_domain(req->sub_auth); 320 321 if (req->smb2_max_read) 322 init_smb2_max_read_size(req->smb2_max_read); 323 if (req->smb2_max_write) 324 init_smb2_max_write_size(req->smb2_max_write); 325 if (req->smb2_max_trans) 326 init_smb2_max_trans_size(req->smb2_max_trans); 327 if (req->smb2_max_credits) { 328 init_smb2_max_credits(req->smb2_max_credits); 329 server_conf.max_inflight_req = 330 req->smb2_max_credits; 331 } 332 if (req->smbd_max_io_size) 333 init_smbd_max_io_size(req->smbd_max_io_size); 334 335 if (req->max_connections) 336 server_conf.max_connections = req->max_connections; 337 338 ret = ksmbd_set_netbios_name(req->netbios_name); 339 ret |= ksmbd_set_server_string(req->server_string); 340 ret |= ksmbd_set_work_group(req->work_group); 341 server_conf.bind_interfaces_only = req->bind_interfaces_only; 342 ret |= ksmbd_tcp_set_interfaces(KSMBD_STARTUP_CONFIG_INTERFACES(req), 343 req->ifc_list_sz); 344 out: 345 if (ret) { 346 pr_err("Server configuration error: %s %s %s\n", 347 req->netbios_name, req->server_string, 348 req->work_group); 349 return ret; 350 } 351 352 if (req->min_prot[0]) { 353 ret = ksmbd_lookup_protocol_idx(req->min_prot); 354 if (ret >= 0) 355 server_conf.min_protocol = ret; 356 } 357 if (req->max_prot[0]) { 358 ret = ksmbd_lookup_protocol_idx(req->max_prot); 359 if (ret >= 0) 360 server_conf.max_protocol = ret; 361 } 362 363 if (server_conf.ipc_timeout) 364 schedule_delayed_work(&ipc_timer_work, server_conf.ipc_timeout); 365 return 0; 366 } 367 368 static int handle_startup_event(struct sk_buff *skb, struct genl_info *info) 369 { 370 int ret = 0; 371 372 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN 373 if (!netlink_capable(skb, CAP_NET_ADMIN)) 374 return -EPERM; 375 #endif 376 377 if (!ksmbd_ipc_validate_version(info)) 378 return -EINVAL; 379 380 if (!info->attrs[KSMBD_EVENT_STARTING_UP]) 381 return -EINVAL; 382 383 mutex_lock(&startup_lock); 384 if (!ksmbd_server_configurable()) { 385 mutex_unlock(&startup_lock); 386 pr_err("Server reset is in progress, can't start daemon\n"); 387 return -EINVAL; 388 } 389 390 if (ksmbd_tools_pid) { 391 if (ksmbd_ipc_heartbeat_request() == 0) { 392 ret = -EINVAL; 393 goto out; 394 } 395 396 pr_err("Reconnect to a new user space daemon\n"); 397 } else { 398 struct ksmbd_startup_request *req; 399 400 req = nla_data(info->attrs[info->genlhdr->cmd]); 401 ret = ipc_server_config_on_startup(req); 402 if (ret) 403 goto out; 404 server_queue_ctrl_init_work(); 405 } 406 407 ksmbd_tools_pid = info->snd_portid; 408 ipc_update_last_active(); 409 410 out: 411 mutex_unlock(&startup_lock); 412 return ret; 413 } 414 415 static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info) 416 { 417 pr_err("Unknown IPC event: %d, ignore.\n", info->genlhdr->cmd); 418 return -EINVAL; 419 } 420 421 static int handle_generic_event(struct sk_buff *skb, struct genl_info *info) 422 { 423 void *payload; 424 int sz; 425 int type = info->genlhdr->cmd; 426 427 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN 428 if (!netlink_capable(skb, CAP_NET_ADMIN)) 429 return -EPERM; 430 #endif 431 432 if (type > KSMBD_EVENT_MAX) { 433 WARN_ON(1); 434 return -EINVAL; 435 } 436 437 if (!ksmbd_ipc_validate_version(info)) 438 return -EINVAL; 439 440 if (!info->attrs[type]) 441 return -EINVAL; 442 443 payload = nla_data(info->attrs[info->genlhdr->cmd]); 444 sz = nla_len(info->attrs[info->genlhdr->cmd]); 445 return handle_response(type, payload, sz); 446 } 447 448 static int ipc_msg_send(struct ksmbd_ipc_msg *msg) 449 { 450 struct genlmsghdr *nlh; 451 struct sk_buff *skb; 452 int ret = -EINVAL; 453 454 if (!ksmbd_tools_pid) 455 return ret; 456 457 skb = genlmsg_new(msg->sz, KSMBD_DEFAULT_GFP); 458 if (!skb) 459 return -ENOMEM; 460 461 nlh = genlmsg_put(skb, 0, 0, &ksmbd_genl_family, 0, msg->type); 462 if (!nlh) 463 goto out; 464 465 ret = nla_put(skb, msg->type, msg->sz, msg->payload); 466 if (ret) { 467 genlmsg_cancel(skb, nlh); 468 goto out; 469 } 470 471 genlmsg_end(skb, nlh); 472 ret = genlmsg_unicast(&init_net, skb, ksmbd_tools_pid); 473 if (!ret) 474 ipc_update_last_active(); 475 return ret; 476 477 out: 478 nlmsg_free(skb); 479 return ret; 480 } 481 482 static int ipc_validate_msg(struct ipc_msg_table_entry *entry) 483 { 484 unsigned int msg_sz = entry->msg_sz; 485 486 switch (entry->type) { 487 case KSMBD_EVENT_RPC_REQUEST: 488 { 489 struct ksmbd_rpc_command *resp = entry->response; 490 491 msg_sz = sizeof(struct ksmbd_rpc_command) + resp->payload_sz; 492 break; 493 } 494 case KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST: 495 { 496 struct ksmbd_spnego_authen_response *resp = entry->response; 497 498 msg_sz = sizeof(struct ksmbd_spnego_authen_response) + 499 resp->session_key_len + resp->spnego_blob_len; 500 break; 501 } 502 case KSMBD_EVENT_SHARE_CONFIG_REQUEST: 503 { 504 struct ksmbd_share_config_response *resp = entry->response; 505 506 if (resp->payload_sz) { 507 if (resp->payload_sz < resp->veto_list_sz) 508 return -EINVAL; 509 510 msg_sz = sizeof(struct ksmbd_share_config_response) + 511 resp->payload_sz; 512 } 513 break; 514 } 515 case KSMBD_EVENT_LOGIN_REQUEST_EXT: 516 { 517 struct ksmbd_login_response_ext *resp = entry->response; 518 519 if (resp->ngroups) { 520 msg_sz = sizeof(struct ksmbd_login_response_ext) + 521 resp->ngroups * sizeof(gid_t); 522 } 523 } 524 } 525 526 return entry->msg_sz != msg_sz ? -EINVAL : 0; 527 } 528 529 static void *ipc_msg_send_request(struct ksmbd_ipc_msg *msg, unsigned int handle) 530 { 531 struct ipc_msg_table_entry entry; 532 int ret; 533 534 if ((int)handle < 0) 535 return NULL; 536 537 entry.type = msg->type; 538 entry.response = NULL; 539 init_waitqueue_head(&entry.wait); 540 541 down_write(&ipc_msg_table_lock); 542 entry.handle = handle; 543 hash_add(ipc_msg_table, &entry.ipc_table_hlist, entry.handle); 544 up_write(&ipc_msg_table_lock); 545 546 ret = ipc_msg_send(msg); 547 if (ret) 548 goto out; 549 550 ret = wait_event_interruptible_timeout(entry.wait, 551 entry.response != NULL, 552 IPC_WAIT_TIMEOUT); 553 if (entry.response) { 554 ret = ipc_validate_msg(&entry); 555 if (ret) { 556 kvfree(entry.response); 557 entry.response = NULL; 558 } 559 } 560 out: 561 down_write(&ipc_msg_table_lock); 562 hash_del(&entry.ipc_table_hlist); 563 up_write(&ipc_msg_table_lock); 564 return entry.response; 565 } 566 567 static int ksmbd_ipc_heartbeat_request(void) 568 { 569 struct ksmbd_ipc_msg *msg; 570 int ret; 571 572 msg = ipc_msg_alloc(sizeof(struct ksmbd_heartbeat)); 573 if (!msg) 574 return -EINVAL; 575 576 msg->type = KSMBD_EVENT_HEARTBEAT_REQUEST; 577 ret = ipc_msg_send(msg); 578 ipc_msg_free(msg); 579 return ret; 580 } 581 582 struct ksmbd_login_response *ksmbd_ipc_login_request(const char *account) 583 { 584 struct ksmbd_ipc_msg *msg; 585 struct ksmbd_login_request *req; 586 struct ksmbd_login_response *resp; 587 588 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 589 return NULL; 590 591 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); 592 if (!msg) 593 return NULL; 594 595 msg->type = KSMBD_EVENT_LOGIN_REQUEST; 596 req = (struct ksmbd_login_request *)msg->payload; 597 req->handle = ksmbd_acquire_id(&ipc_ida); 598 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 599 600 resp = ipc_msg_send_request(msg, req->handle); 601 ipc_msg_handle_free(req->handle); 602 ipc_msg_free(msg); 603 return resp; 604 } 605 606 struct ksmbd_login_response_ext *ksmbd_ipc_login_request_ext(const char *account) 607 { 608 struct ksmbd_ipc_msg *msg; 609 struct ksmbd_login_request *req; 610 struct ksmbd_login_response_ext *resp; 611 612 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 613 return NULL; 614 615 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); 616 if (!msg) 617 return NULL; 618 619 msg->type = KSMBD_EVENT_LOGIN_REQUEST_EXT; 620 req = (struct ksmbd_login_request *)msg->payload; 621 req->handle = ksmbd_acquire_id(&ipc_ida); 622 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 623 resp = ipc_msg_send_request(msg, req->handle); 624 ipc_msg_handle_free(req->handle); 625 ipc_msg_free(msg); 626 return resp; 627 } 628 629 struct ksmbd_spnego_authen_response * 630 ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len) 631 { 632 struct ksmbd_ipc_msg *msg; 633 struct ksmbd_spnego_authen_request *req; 634 struct ksmbd_spnego_authen_response *resp; 635 636 if (blob_len > KSMBD_IPC_MAX_PAYLOAD) 637 return NULL; 638 639 msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) + 640 blob_len + 1); 641 if (!msg) 642 return NULL; 643 644 msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST; 645 req = (struct ksmbd_spnego_authen_request *)msg->payload; 646 req->handle = ksmbd_acquire_id(&ipc_ida); 647 req->spnego_blob_len = blob_len; 648 memcpy(req->spnego_blob, spnego_blob, blob_len); 649 650 resp = ipc_msg_send_request(msg, req->handle); 651 ipc_msg_handle_free(req->handle); 652 ipc_msg_free(msg); 653 return resp; 654 } 655 656 struct ksmbd_tree_connect_response * 657 ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess, 658 struct ksmbd_share_config *share, 659 struct ksmbd_tree_connect *tree_conn, 660 struct sockaddr *peer_addr) 661 { 662 struct ksmbd_ipc_msg *msg; 663 struct ksmbd_tree_connect_request *req; 664 struct ksmbd_tree_connect_response *resp; 665 666 if (strlen(user_name(sess->user)) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 667 return NULL; 668 669 if (strlen(share->name) >= KSMBD_REQ_MAX_SHARE_NAME) 670 return NULL; 671 672 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_connect_request)); 673 if (!msg) 674 return NULL; 675 676 msg->type = KSMBD_EVENT_TREE_CONNECT_REQUEST; 677 req = (struct ksmbd_tree_connect_request *)msg->payload; 678 679 req->handle = ksmbd_acquire_id(&ipc_ida); 680 req->account_flags = sess->user->flags; 681 req->session_id = sess->id; 682 req->connect_id = tree_conn->id; 683 strscpy(req->account, user_name(sess->user), KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 684 strscpy(req->share, share->name, KSMBD_REQ_MAX_SHARE_NAME); 685 snprintf(req->peer_addr, sizeof(req->peer_addr), "%pIS", peer_addr); 686 687 if (peer_addr->sa_family == AF_INET6) 688 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_IPV6; 689 if (test_session_flag(sess, CIFDS_SESSION_FLAG_SMB2)) 690 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_SMB2; 691 692 resp = ipc_msg_send_request(msg, req->handle); 693 ipc_msg_handle_free(req->handle); 694 ipc_msg_free(msg); 695 return resp; 696 } 697 698 int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id, 699 unsigned long long connect_id) 700 { 701 struct ksmbd_ipc_msg *msg; 702 struct ksmbd_tree_disconnect_request *req; 703 int ret; 704 705 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_disconnect_request)); 706 if (!msg) 707 return -ENOMEM; 708 709 msg->type = KSMBD_EVENT_TREE_DISCONNECT_REQUEST; 710 req = (struct ksmbd_tree_disconnect_request *)msg->payload; 711 req->session_id = session_id; 712 req->connect_id = connect_id; 713 714 ret = ipc_msg_send(msg); 715 ipc_msg_free(msg); 716 return ret; 717 } 718 719 int ksmbd_ipc_logout_request(const char *account, int flags) 720 { 721 struct ksmbd_ipc_msg *msg; 722 struct ksmbd_logout_request *req; 723 int ret; 724 725 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 726 return -EINVAL; 727 728 msg = ipc_msg_alloc(sizeof(struct ksmbd_logout_request)); 729 if (!msg) 730 return -ENOMEM; 731 732 msg->type = KSMBD_EVENT_LOGOUT_REQUEST; 733 req = (struct ksmbd_logout_request *)msg->payload; 734 req->account_flags = flags; 735 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 736 737 ret = ipc_msg_send(msg); 738 ipc_msg_free(msg); 739 return ret; 740 } 741 742 struct ksmbd_share_config_response * 743 ksmbd_ipc_share_config_request(const char *name) 744 { 745 struct ksmbd_ipc_msg *msg; 746 struct ksmbd_share_config_request *req; 747 struct ksmbd_share_config_response *resp; 748 749 if (strlen(name) >= KSMBD_REQ_MAX_SHARE_NAME) 750 return NULL; 751 752 msg = ipc_msg_alloc(sizeof(struct ksmbd_share_config_request)); 753 if (!msg) 754 return NULL; 755 756 msg->type = KSMBD_EVENT_SHARE_CONFIG_REQUEST; 757 req = (struct ksmbd_share_config_request *)msg->payload; 758 req->handle = ksmbd_acquire_id(&ipc_ida); 759 strscpy(req->share_name, name, KSMBD_REQ_MAX_SHARE_NAME); 760 761 resp = ipc_msg_send_request(msg, req->handle); 762 ipc_msg_handle_free(req->handle); 763 ipc_msg_free(msg); 764 return resp; 765 } 766 767 struct ksmbd_rpc_command *ksmbd_rpc_open(struct ksmbd_session *sess, int handle) 768 { 769 struct ksmbd_ipc_msg *msg; 770 struct ksmbd_rpc_command *req; 771 struct ksmbd_rpc_command *resp; 772 773 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 774 if (!msg) 775 return NULL; 776 777 msg->type = KSMBD_EVENT_RPC_REQUEST; 778 req = (struct ksmbd_rpc_command *)msg->payload; 779 req->handle = handle; 780 req->flags = ksmbd_session_rpc_method(sess, handle); 781 req->flags |= KSMBD_RPC_OPEN_METHOD; 782 req->payload_sz = 0; 783 784 resp = ipc_msg_send_request(msg, req->handle); 785 ipc_msg_free(msg); 786 return resp; 787 } 788 789 struct ksmbd_rpc_command *ksmbd_rpc_close(struct ksmbd_session *sess, int handle) 790 { 791 struct ksmbd_ipc_msg *msg; 792 struct ksmbd_rpc_command *req; 793 struct ksmbd_rpc_command *resp; 794 795 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 796 if (!msg) 797 return NULL; 798 799 msg->type = KSMBD_EVENT_RPC_REQUEST; 800 req = (struct ksmbd_rpc_command *)msg->payload; 801 req->handle = handle; 802 req->flags = ksmbd_session_rpc_method(sess, handle); 803 req->flags |= KSMBD_RPC_CLOSE_METHOD; 804 req->payload_sz = 0; 805 806 resp = ipc_msg_send_request(msg, req->handle); 807 ipc_msg_free(msg); 808 return resp; 809 } 810 811 struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle, 812 void *payload, size_t payload_sz) 813 { 814 struct ksmbd_ipc_msg *msg; 815 struct ksmbd_rpc_command *req; 816 struct ksmbd_rpc_command *resp; 817 818 if (payload_sz > KSMBD_IPC_MAX_PAYLOAD) 819 return NULL; 820 821 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 822 if (!msg) 823 return NULL; 824 825 msg->type = KSMBD_EVENT_RPC_REQUEST; 826 req = (struct ksmbd_rpc_command *)msg->payload; 827 req->handle = handle; 828 req->flags = ksmbd_session_rpc_method(sess, handle); 829 req->flags |= rpc_context_flags(sess); 830 req->flags |= KSMBD_RPC_WRITE_METHOD; 831 req->payload_sz = payload_sz; 832 memcpy(req->payload, payload, payload_sz); 833 834 resp = ipc_msg_send_request(msg, req->handle); 835 ipc_msg_free(msg); 836 return resp; 837 } 838 839 struct ksmbd_rpc_command *ksmbd_rpc_read(struct ksmbd_session *sess, int handle) 840 { 841 struct ksmbd_ipc_msg *msg; 842 struct ksmbd_rpc_command *req; 843 struct ksmbd_rpc_command *resp; 844 845 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 846 if (!msg) 847 return NULL; 848 849 msg->type = KSMBD_EVENT_RPC_REQUEST; 850 req = (struct ksmbd_rpc_command *)msg->payload; 851 req->handle = handle; 852 req->flags = ksmbd_session_rpc_method(sess, handle); 853 req->flags |= rpc_context_flags(sess); 854 req->flags |= KSMBD_RPC_READ_METHOD; 855 req->payload_sz = 0; 856 857 resp = ipc_msg_send_request(msg, req->handle); 858 ipc_msg_free(msg); 859 return resp; 860 } 861 862 struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle, 863 void *payload, size_t payload_sz) 864 { 865 struct ksmbd_ipc_msg *msg; 866 struct ksmbd_rpc_command *req; 867 struct ksmbd_rpc_command *resp; 868 869 if (payload_sz > KSMBD_IPC_MAX_PAYLOAD) 870 return NULL; 871 872 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 873 if (!msg) 874 return NULL; 875 876 msg->type = KSMBD_EVENT_RPC_REQUEST; 877 req = (struct ksmbd_rpc_command *)msg->payload; 878 req->handle = handle; 879 req->flags = ksmbd_session_rpc_method(sess, handle); 880 req->flags |= rpc_context_flags(sess); 881 req->flags |= KSMBD_RPC_IOCTL_METHOD; 882 req->payload_sz = payload_sz; 883 memcpy(req->payload, payload, payload_sz); 884 885 resp = ipc_msg_send_request(msg, req->handle); 886 ipc_msg_free(msg); 887 return resp; 888 } 889 890 static int __ipc_heartbeat(void) 891 { 892 unsigned long delta; 893 894 if (!ksmbd_server_running()) 895 return 0; 896 897 if (time_after(jiffies, server_conf.ipc_last_active)) { 898 delta = (jiffies - server_conf.ipc_last_active); 899 } else { 900 ipc_update_last_active(); 901 schedule_delayed_work(&ipc_timer_work, 902 server_conf.ipc_timeout); 903 return 0; 904 } 905 906 if (delta < server_conf.ipc_timeout) { 907 schedule_delayed_work(&ipc_timer_work, 908 server_conf.ipc_timeout - delta); 909 return 0; 910 } 911 912 if (ksmbd_ipc_heartbeat_request() == 0) { 913 schedule_delayed_work(&ipc_timer_work, 914 server_conf.ipc_timeout); 915 return 0; 916 } 917 918 mutex_lock(&startup_lock); 919 WRITE_ONCE(server_conf.state, SERVER_STATE_RESETTING); 920 server_conf.ipc_last_active = 0; 921 ksmbd_tools_pid = 0; 922 pr_err("No IPC daemon response for %lus\n", delta / HZ); 923 mutex_unlock(&startup_lock); 924 return -EINVAL; 925 } 926 927 static void ipc_timer_heartbeat(struct work_struct *w) 928 { 929 if (__ipc_heartbeat()) 930 server_queue_ctrl_reset_work(); 931 } 932 933 int ksmbd_ipc_id_alloc(void) 934 { 935 return ksmbd_acquire_id(&ipc_ida); 936 } 937 938 void ksmbd_rpc_id_free(int handle) 939 { 940 ksmbd_release_id(&ipc_ida, handle); 941 } 942 943 void ksmbd_ipc_release(void) 944 { 945 cancel_delayed_work_sync(&ipc_timer_work); 946 genl_unregister_family(&ksmbd_genl_family); 947 } 948 949 void ksmbd_ipc_soft_reset(void) 950 { 951 mutex_lock(&startup_lock); 952 ksmbd_tools_pid = 0; 953 cancel_delayed_work_sync(&ipc_timer_work); 954 mutex_unlock(&startup_lock); 955 } 956 957 int ksmbd_ipc_init(void) 958 { 959 int ret = 0; 960 961 ksmbd_nl_init_fixup(); 962 INIT_DELAYED_WORK(&ipc_timer_work, ipc_timer_heartbeat); 963 964 ret = genl_register_family(&ksmbd_genl_family); 965 if (ret) { 966 pr_err("Failed to register KSMBD netlink interface %d\n", ret); 967 cancel_delayed_work_sync(&ipc_timer_work); 968 } 969 970 return ret; 971 } 972