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, GFP_KERNEL); 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 } 285 286 entry->response = kvzalloc(sz, GFP_KERNEL); 287 if (!entry->response) { 288 ret = -ENOMEM; 289 break; 290 } 291 292 memcpy(entry->response, payload, sz); 293 entry->msg_sz = sz; 294 wake_up_interruptible(&entry->wait); 295 ret = 0; 296 break; 297 } 298 up_read(&ipc_msg_table_lock); 299 300 return ret; 301 } 302 303 static int ipc_server_config_on_startup(struct ksmbd_startup_request *req) 304 { 305 int ret; 306 307 ksmbd_set_fd_limit(req->file_max); 308 server_conf.flags = req->flags; 309 server_conf.signing = req->signing; 310 server_conf.tcp_port = req->tcp_port; 311 server_conf.ipc_timeout = req->ipc_timeout * HZ; 312 server_conf.deadtime = req->deadtime * SMB_ECHO_INTERVAL; 313 server_conf.share_fake_fscaps = req->share_fake_fscaps; 314 ksmbd_init_domain(req->sub_auth); 315 316 if (req->smb2_max_read) 317 init_smb2_max_read_size(req->smb2_max_read); 318 if (req->smb2_max_write) 319 init_smb2_max_write_size(req->smb2_max_write); 320 if (req->smb2_max_trans) 321 init_smb2_max_trans_size(req->smb2_max_trans); 322 if (req->smb2_max_credits) 323 init_smb2_max_credits(req->smb2_max_credits); 324 if (req->smbd_max_io_size) 325 init_smbd_max_io_size(req->smbd_max_io_size); 326 327 if (req->max_connections) 328 server_conf.max_connections = req->max_connections; 329 330 ret = ksmbd_set_netbios_name(req->netbios_name); 331 ret |= ksmbd_set_server_string(req->server_string); 332 ret |= ksmbd_set_work_group(req->work_group); 333 ret |= ksmbd_tcp_set_interfaces(KSMBD_STARTUP_CONFIG_INTERFACES(req), 334 req->ifc_list_sz); 335 if (ret) { 336 pr_err("Server configuration error: %s %s %s\n", 337 req->netbios_name, req->server_string, 338 req->work_group); 339 return ret; 340 } 341 342 if (req->min_prot[0]) { 343 ret = ksmbd_lookup_protocol_idx(req->min_prot); 344 if (ret >= 0) 345 server_conf.min_protocol = ret; 346 } 347 if (req->max_prot[0]) { 348 ret = ksmbd_lookup_protocol_idx(req->max_prot); 349 if (ret >= 0) 350 server_conf.max_protocol = ret; 351 } 352 353 if (server_conf.ipc_timeout) 354 schedule_delayed_work(&ipc_timer_work, server_conf.ipc_timeout); 355 return 0; 356 } 357 358 static int handle_startup_event(struct sk_buff *skb, struct genl_info *info) 359 { 360 int ret = 0; 361 362 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN 363 if (!netlink_capable(skb, CAP_NET_ADMIN)) 364 return -EPERM; 365 #endif 366 367 if (!ksmbd_ipc_validate_version(info)) 368 return -EINVAL; 369 370 if (!info->attrs[KSMBD_EVENT_STARTING_UP]) 371 return -EINVAL; 372 373 mutex_lock(&startup_lock); 374 if (!ksmbd_server_configurable()) { 375 mutex_unlock(&startup_lock); 376 pr_err("Server reset is in progress, can't start daemon\n"); 377 return -EINVAL; 378 } 379 380 if (ksmbd_tools_pid) { 381 if (ksmbd_ipc_heartbeat_request() == 0) { 382 ret = -EINVAL; 383 goto out; 384 } 385 386 pr_err("Reconnect to a new user space daemon\n"); 387 } else { 388 struct ksmbd_startup_request *req; 389 390 req = nla_data(info->attrs[info->genlhdr->cmd]); 391 ret = ipc_server_config_on_startup(req); 392 if (ret) 393 goto out; 394 server_queue_ctrl_init_work(); 395 } 396 397 ksmbd_tools_pid = info->snd_portid; 398 ipc_update_last_active(); 399 400 out: 401 mutex_unlock(&startup_lock); 402 return ret; 403 } 404 405 static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info) 406 { 407 pr_err("Unknown IPC event: %d, ignore.\n", info->genlhdr->cmd); 408 return -EINVAL; 409 } 410 411 static int handle_generic_event(struct sk_buff *skb, struct genl_info *info) 412 { 413 void *payload; 414 int sz; 415 int type = info->genlhdr->cmd; 416 417 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN 418 if (!netlink_capable(skb, CAP_NET_ADMIN)) 419 return -EPERM; 420 #endif 421 422 if (type > KSMBD_EVENT_MAX) { 423 WARN_ON(1); 424 return -EINVAL; 425 } 426 427 if (!ksmbd_ipc_validate_version(info)) 428 return -EINVAL; 429 430 if (!info->attrs[type]) 431 return -EINVAL; 432 433 payload = nla_data(info->attrs[info->genlhdr->cmd]); 434 sz = nla_len(info->attrs[info->genlhdr->cmd]); 435 return handle_response(type, payload, sz); 436 } 437 438 static int ipc_msg_send(struct ksmbd_ipc_msg *msg) 439 { 440 struct genlmsghdr *nlh; 441 struct sk_buff *skb; 442 int ret = -EINVAL; 443 444 if (!ksmbd_tools_pid) 445 return ret; 446 447 skb = genlmsg_new(msg->sz, GFP_KERNEL); 448 if (!skb) 449 return -ENOMEM; 450 451 nlh = genlmsg_put(skb, 0, 0, &ksmbd_genl_family, 0, msg->type); 452 if (!nlh) 453 goto out; 454 455 ret = nla_put(skb, msg->type, msg->sz, msg->payload); 456 if (ret) { 457 genlmsg_cancel(skb, nlh); 458 goto out; 459 } 460 461 genlmsg_end(skb, nlh); 462 ret = genlmsg_unicast(&init_net, skb, ksmbd_tools_pid); 463 if (!ret) 464 ipc_update_last_active(); 465 return ret; 466 467 out: 468 nlmsg_free(skb); 469 return ret; 470 } 471 472 static int ipc_validate_msg(struct ipc_msg_table_entry *entry) 473 { 474 unsigned int msg_sz = entry->msg_sz; 475 476 switch (entry->type) { 477 case KSMBD_EVENT_RPC_REQUEST: 478 { 479 struct ksmbd_rpc_command *resp = entry->response; 480 481 msg_sz = sizeof(struct ksmbd_rpc_command) + resp->payload_sz; 482 break; 483 } 484 case KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST: 485 { 486 struct ksmbd_spnego_authen_response *resp = entry->response; 487 488 msg_sz = sizeof(struct ksmbd_spnego_authen_response) + 489 resp->session_key_len + resp->spnego_blob_len; 490 break; 491 } 492 case KSMBD_EVENT_SHARE_CONFIG_REQUEST: 493 { 494 struct ksmbd_share_config_response *resp = entry->response; 495 496 if (resp->payload_sz) { 497 if (resp->payload_sz < resp->veto_list_sz) 498 return -EINVAL; 499 500 msg_sz = sizeof(struct ksmbd_share_config_response) + 501 resp->payload_sz; 502 } 503 break; 504 } 505 case KSMBD_EVENT_LOGIN_REQUEST_EXT: 506 { 507 struct ksmbd_login_response_ext *resp = entry->response; 508 509 if (resp->ngroups) { 510 msg_sz = sizeof(struct ksmbd_login_response_ext) + 511 resp->ngroups * sizeof(gid_t); 512 } 513 } 514 } 515 516 return entry->msg_sz != msg_sz ? -EINVAL : 0; 517 } 518 519 static void *ipc_msg_send_request(struct ksmbd_ipc_msg *msg, unsigned int handle) 520 { 521 struct ipc_msg_table_entry entry; 522 int ret; 523 524 if ((int)handle < 0) 525 return NULL; 526 527 entry.type = msg->type; 528 entry.response = NULL; 529 init_waitqueue_head(&entry.wait); 530 531 down_write(&ipc_msg_table_lock); 532 entry.handle = handle; 533 hash_add(ipc_msg_table, &entry.ipc_table_hlist, entry.handle); 534 up_write(&ipc_msg_table_lock); 535 536 ret = ipc_msg_send(msg); 537 if (ret) 538 goto out; 539 540 ret = wait_event_interruptible_timeout(entry.wait, 541 entry.response != NULL, 542 IPC_WAIT_TIMEOUT); 543 if (entry.response) { 544 ret = ipc_validate_msg(&entry); 545 if (ret) { 546 kvfree(entry.response); 547 entry.response = NULL; 548 } 549 } 550 out: 551 down_write(&ipc_msg_table_lock); 552 hash_del(&entry.ipc_table_hlist); 553 up_write(&ipc_msg_table_lock); 554 return entry.response; 555 } 556 557 static int ksmbd_ipc_heartbeat_request(void) 558 { 559 struct ksmbd_ipc_msg *msg; 560 int ret; 561 562 msg = ipc_msg_alloc(sizeof(struct ksmbd_heartbeat)); 563 if (!msg) 564 return -EINVAL; 565 566 msg->type = KSMBD_EVENT_HEARTBEAT_REQUEST; 567 ret = ipc_msg_send(msg); 568 ipc_msg_free(msg); 569 return ret; 570 } 571 572 struct ksmbd_login_response *ksmbd_ipc_login_request(const char *account) 573 { 574 struct ksmbd_ipc_msg *msg; 575 struct ksmbd_login_request *req; 576 struct ksmbd_login_response *resp; 577 578 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 579 return NULL; 580 581 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); 582 if (!msg) 583 return NULL; 584 585 msg->type = KSMBD_EVENT_LOGIN_REQUEST; 586 req = (struct ksmbd_login_request *)msg->payload; 587 req->handle = ksmbd_acquire_id(&ipc_ida); 588 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 589 590 resp = ipc_msg_send_request(msg, req->handle); 591 ipc_msg_handle_free(req->handle); 592 ipc_msg_free(msg); 593 return resp; 594 } 595 596 struct ksmbd_login_response_ext *ksmbd_ipc_login_request_ext(const char *account) 597 { 598 struct ksmbd_ipc_msg *msg; 599 struct ksmbd_login_request *req; 600 struct ksmbd_login_response_ext *resp; 601 602 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 603 return NULL; 604 605 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); 606 if (!msg) 607 return NULL; 608 609 msg->type = KSMBD_EVENT_LOGIN_REQUEST_EXT; 610 req = (struct ksmbd_login_request *)msg->payload; 611 req->handle = ksmbd_acquire_id(&ipc_ida); 612 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 613 resp = ipc_msg_send_request(msg, req->handle); 614 ipc_msg_handle_free(req->handle); 615 ipc_msg_free(msg); 616 return resp; 617 } 618 619 struct ksmbd_spnego_authen_response * 620 ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len) 621 { 622 struct ksmbd_ipc_msg *msg; 623 struct ksmbd_spnego_authen_request *req; 624 struct ksmbd_spnego_authen_response *resp; 625 626 msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) + 627 blob_len + 1); 628 if (!msg) 629 return NULL; 630 631 msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST; 632 req = (struct ksmbd_spnego_authen_request *)msg->payload; 633 req->handle = ksmbd_acquire_id(&ipc_ida); 634 req->spnego_blob_len = blob_len; 635 memcpy(req->spnego_blob, spnego_blob, blob_len); 636 637 resp = ipc_msg_send_request(msg, req->handle); 638 ipc_msg_handle_free(req->handle); 639 ipc_msg_free(msg); 640 return resp; 641 } 642 643 struct ksmbd_tree_connect_response * 644 ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess, 645 struct ksmbd_share_config *share, 646 struct ksmbd_tree_connect *tree_conn, 647 struct sockaddr *peer_addr) 648 { 649 struct ksmbd_ipc_msg *msg; 650 struct ksmbd_tree_connect_request *req; 651 struct ksmbd_tree_connect_response *resp; 652 653 if (strlen(user_name(sess->user)) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 654 return NULL; 655 656 if (strlen(share->name) >= KSMBD_REQ_MAX_SHARE_NAME) 657 return NULL; 658 659 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_connect_request)); 660 if (!msg) 661 return NULL; 662 663 msg->type = KSMBD_EVENT_TREE_CONNECT_REQUEST; 664 req = (struct ksmbd_tree_connect_request *)msg->payload; 665 666 req->handle = ksmbd_acquire_id(&ipc_ida); 667 req->account_flags = sess->user->flags; 668 req->session_id = sess->id; 669 req->connect_id = tree_conn->id; 670 strscpy(req->account, user_name(sess->user), KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 671 strscpy(req->share, share->name, KSMBD_REQ_MAX_SHARE_NAME); 672 snprintf(req->peer_addr, sizeof(req->peer_addr), "%pIS", peer_addr); 673 674 if (peer_addr->sa_family == AF_INET6) 675 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_IPV6; 676 if (test_session_flag(sess, CIFDS_SESSION_FLAG_SMB2)) 677 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_SMB2; 678 679 resp = ipc_msg_send_request(msg, req->handle); 680 ipc_msg_handle_free(req->handle); 681 ipc_msg_free(msg); 682 return resp; 683 } 684 685 int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id, 686 unsigned long long connect_id) 687 { 688 struct ksmbd_ipc_msg *msg; 689 struct ksmbd_tree_disconnect_request *req; 690 int ret; 691 692 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_disconnect_request)); 693 if (!msg) 694 return -ENOMEM; 695 696 msg->type = KSMBD_EVENT_TREE_DISCONNECT_REQUEST; 697 req = (struct ksmbd_tree_disconnect_request *)msg->payload; 698 req->session_id = session_id; 699 req->connect_id = connect_id; 700 701 ret = ipc_msg_send(msg); 702 ipc_msg_free(msg); 703 return ret; 704 } 705 706 int ksmbd_ipc_logout_request(const char *account, int flags) 707 { 708 struct ksmbd_ipc_msg *msg; 709 struct ksmbd_logout_request *req; 710 int ret; 711 712 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 713 return -EINVAL; 714 715 msg = ipc_msg_alloc(sizeof(struct ksmbd_logout_request)); 716 if (!msg) 717 return -ENOMEM; 718 719 msg->type = KSMBD_EVENT_LOGOUT_REQUEST; 720 req = (struct ksmbd_logout_request *)msg->payload; 721 req->account_flags = flags; 722 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 723 724 ret = ipc_msg_send(msg); 725 ipc_msg_free(msg); 726 return ret; 727 } 728 729 struct ksmbd_share_config_response * 730 ksmbd_ipc_share_config_request(const char *name) 731 { 732 struct ksmbd_ipc_msg *msg; 733 struct ksmbd_share_config_request *req; 734 struct ksmbd_share_config_response *resp; 735 736 if (strlen(name) >= KSMBD_REQ_MAX_SHARE_NAME) 737 return NULL; 738 739 msg = ipc_msg_alloc(sizeof(struct ksmbd_share_config_request)); 740 if (!msg) 741 return NULL; 742 743 msg->type = KSMBD_EVENT_SHARE_CONFIG_REQUEST; 744 req = (struct ksmbd_share_config_request *)msg->payload; 745 req->handle = ksmbd_acquire_id(&ipc_ida); 746 strscpy(req->share_name, name, KSMBD_REQ_MAX_SHARE_NAME); 747 748 resp = ipc_msg_send_request(msg, req->handle); 749 ipc_msg_handle_free(req->handle); 750 ipc_msg_free(msg); 751 return resp; 752 } 753 754 struct ksmbd_rpc_command *ksmbd_rpc_open(struct ksmbd_session *sess, int handle) 755 { 756 struct ksmbd_ipc_msg *msg; 757 struct ksmbd_rpc_command *req; 758 struct ksmbd_rpc_command *resp; 759 760 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 761 if (!msg) 762 return NULL; 763 764 msg->type = KSMBD_EVENT_RPC_REQUEST; 765 req = (struct ksmbd_rpc_command *)msg->payload; 766 req->handle = handle; 767 req->flags = ksmbd_session_rpc_method(sess, handle); 768 req->flags |= KSMBD_RPC_OPEN_METHOD; 769 req->payload_sz = 0; 770 771 resp = ipc_msg_send_request(msg, req->handle); 772 ipc_msg_free(msg); 773 return resp; 774 } 775 776 struct ksmbd_rpc_command *ksmbd_rpc_close(struct ksmbd_session *sess, int handle) 777 { 778 struct ksmbd_ipc_msg *msg; 779 struct ksmbd_rpc_command *req; 780 struct ksmbd_rpc_command *resp; 781 782 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 783 if (!msg) 784 return NULL; 785 786 msg->type = KSMBD_EVENT_RPC_REQUEST; 787 req = (struct ksmbd_rpc_command *)msg->payload; 788 req->handle = handle; 789 req->flags = ksmbd_session_rpc_method(sess, handle); 790 req->flags |= KSMBD_RPC_CLOSE_METHOD; 791 req->payload_sz = 0; 792 793 resp = ipc_msg_send_request(msg, req->handle); 794 ipc_msg_free(msg); 795 return resp; 796 } 797 798 struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle, 799 void *payload, size_t payload_sz) 800 { 801 struct ksmbd_ipc_msg *msg; 802 struct ksmbd_rpc_command *req; 803 struct ksmbd_rpc_command *resp; 804 805 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 806 if (!msg) 807 return NULL; 808 809 msg->type = KSMBD_EVENT_RPC_REQUEST; 810 req = (struct ksmbd_rpc_command *)msg->payload; 811 req->handle = handle; 812 req->flags = ksmbd_session_rpc_method(sess, handle); 813 req->flags |= rpc_context_flags(sess); 814 req->flags |= KSMBD_RPC_WRITE_METHOD; 815 req->payload_sz = payload_sz; 816 memcpy(req->payload, payload, payload_sz); 817 818 resp = ipc_msg_send_request(msg, req->handle); 819 ipc_msg_free(msg); 820 return resp; 821 } 822 823 struct ksmbd_rpc_command *ksmbd_rpc_read(struct ksmbd_session *sess, int handle) 824 { 825 struct ksmbd_ipc_msg *msg; 826 struct ksmbd_rpc_command *req; 827 struct ksmbd_rpc_command *resp; 828 829 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 830 if (!msg) 831 return NULL; 832 833 msg->type = KSMBD_EVENT_RPC_REQUEST; 834 req = (struct ksmbd_rpc_command *)msg->payload; 835 req->handle = handle; 836 req->flags = ksmbd_session_rpc_method(sess, handle); 837 req->flags |= rpc_context_flags(sess); 838 req->flags |= KSMBD_RPC_READ_METHOD; 839 req->payload_sz = 0; 840 841 resp = ipc_msg_send_request(msg, req->handle); 842 ipc_msg_free(msg); 843 return resp; 844 } 845 846 struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle, 847 void *payload, size_t payload_sz) 848 { 849 struct ksmbd_ipc_msg *msg; 850 struct ksmbd_rpc_command *req; 851 struct ksmbd_rpc_command *resp; 852 853 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 854 if (!msg) 855 return NULL; 856 857 msg->type = KSMBD_EVENT_RPC_REQUEST; 858 req = (struct ksmbd_rpc_command *)msg->payload; 859 req->handle = handle; 860 req->flags = ksmbd_session_rpc_method(sess, handle); 861 req->flags |= rpc_context_flags(sess); 862 req->flags |= KSMBD_RPC_IOCTL_METHOD; 863 req->payload_sz = payload_sz; 864 memcpy(req->payload, payload, payload_sz); 865 866 resp = ipc_msg_send_request(msg, req->handle); 867 ipc_msg_free(msg); 868 return resp; 869 } 870 871 struct ksmbd_rpc_command *ksmbd_rpc_rap(struct ksmbd_session *sess, void *payload, 872 size_t payload_sz) 873 { 874 struct ksmbd_ipc_msg *msg; 875 struct ksmbd_rpc_command *req; 876 struct ksmbd_rpc_command *resp; 877 878 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 879 if (!msg) 880 return NULL; 881 882 msg->type = KSMBD_EVENT_RPC_REQUEST; 883 req = (struct ksmbd_rpc_command *)msg->payload; 884 req->handle = ksmbd_acquire_id(&ipc_ida); 885 req->flags = rpc_context_flags(sess); 886 req->flags |= KSMBD_RPC_RAP_METHOD; 887 req->payload_sz = payload_sz; 888 memcpy(req->payload, payload, payload_sz); 889 890 resp = ipc_msg_send_request(msg, req->handle); 891 ipc_msg_handle_free(req->handle); 892 ipc_msg_free(msg); 893 return resp; 894 } 895 896 static int __ipc_heartbeat(void) 897 { 898 unsigned long delta; 899 900 if (!ksmbd_server_running()) 901 return 0; 902 903 if (time_after(jiffies, server_conf.ipc_last_active)) { 904 delta = (jiffies - server_conf.ipc_last_active); 905 } else { 906 ipc_update_last_active(); 907 schedule_delayed_work(&ipc_timer_work, 908 server_conf.ipc_timeout); 909 return 0; 910 } 911 912 if (delta < server_conf.ipc_timeout) { 913 schedule_delayed_work(&ipc_timer_work, 914 server_conf.ipc_timeout - delta); 915 return 0; 916 } 917 918 if (ksmbd_ipc_heartbeat_request() == 0) { 919 schedule_delayed_work(&ipc_timer_work, 920 server_conf.ipc_timeout); 921 return 0; 922 } 923 924 mutex_lock(&startup_lock); 925 WRITE_ONCE(server_conf.state, SERVER_STATE_RESETTING); 926 server_conf.ipc_last_active = 0; 927 ksmbd_tools_pid = 0; 928 pr_err("No IPC daemon response for %lus\n", delta / HZ); 929 mutex_unlock(&startup_lock); 930 return -EINVAL; 931 } 932 933 static void ipc_timer_heartbeat(struct work_struct *w) 934 { 935 if (__ipc_heartbeat()) 936 server_queue_ctrl_reset_work(); 937 } 938 939 int ksmbd_ipc_id_alloc(void) 940 { 941 return ksmbd_acquire_id(&ipc_ida); 942 } 943 944 void ksmbd_rpc_id_free(int handle) 945 { 946 ksmbd_release_id(&ipc_ida, handle); 947 } 948 949 void ksmbd_ipc_release(void) 950 { 951 cancel_delayed_work_sync(&ipc_timer_work); 952 genl_unregister_family(&ksmbd_genl_family); 953 } 954 955 void ksmbd_ipc_soft_reset(void) 956 { 957 mutex_lock(&startup_lock); 958 ksmbd_tools_pid = 0; 959 cancel_delayed_work_sync(&ipc_timer_work); 960 mutex_unlock(&startup_lock); 961 } 962 963 int ksmbd_ipc_init(void) 964 { 965 int ret = 0; 966 967 ksmbd_nl_init_fixup(); 968 INIT_DELAYED_WORK(&ipc_timer_work, ipc_timer_heartbeat); 969 970 ret = genl_register_family(&ksmbd_genl_family); 971 if (ret) { 972 pr_err("Failed to register KSMBD netlink interface %d\n", ret); 973 cancel_delayed_work_sync(&ipc_timer_work); 974 } 975 976 return ret; 977 } 978