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