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 } 285 286 entry->response = kvzalloc(sz, KSMBD_DEFAULT_GFP); 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 server_conf.max_inflight_req = 325 req->smb2_max_credits; 326 } 327 if (req->smbd_max_io_size) 328 init_smbd_max_io_size(req->smbd_max_io_size); 329 330 if (req->max_connections) 331 server_conf.max_connections = req->max_connections; 332 333 ret = ksmbd_set_netbios_name(req->netbios_name); 334 ret |= ksmbd_set_server_string(req->server_string); 335 ret |= ksmbd_set_work_group(req->work_group); 336 ret |= ksmbd_tcp_set_interfaces(KSMBD_STARTUP_CONFIG_INTERFACES(req), 337 req->ifc_list_sz); 338 if (ret) { 339 pr_err("Server configuration error: %s %s %s\n", 340 req->netbios_name, req->server_string, 341 req->work_group); 342 return ret; 343 } 344 345 if (req->min_prot[0]) { 346 ret = ksmbd_lookup_protocol_idx(req->min_prot); 347 if (ret >= 0) 348 server_conf.min_protocol = ret; 349 } 350 if (req->max_prot[0]) { 351 ret = ksmbd_lookup_protocol_idx(req->max_prot); 352 if (ret >= 0) 353 server_conf.max_protocol = ret; 354 } 355 356 if (server_conf.ipc_timeout) 357 schedule_delayed_work(&ipc_timer_work, server_conf.ipc_timeout); 358 return 0; 359 } 360 361 static int handle_startup_event(struct sk_buff *skb, struct genl_info *info) 362 { 363 int ret = 0; 364 365 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN 366 if (!netlink_capable(skb, CAP_NET_ADMIN)) 367 return -EPERM; 368 #endif 369 370 if (!ksmbd_ipc_validate_version(info)) 371 return -EINVAL; 372 373 if (!info->attrs[KSMBD_EVENT_STARTING_UP]) 374 return -EINVAL; 375 376 mutex_lock(&startup_lock); 377 if (!ksmbd_server_configurable()) { 378 mutex_unlock(&startup_lock); 379 pr_err("Server reset is in progress, can't start daemon\n"); 380 return -EINVAL; 381 } 382 383 if (ksmbd_tools_pid) { 384 if (ksmbd_ipc_heartbeat_request() == 0) { 385 ret = -EINVAL; 386 goto out; 387 } 388 389 pr_err("Reconnect to a new user space daemon\n"); 390 } else { 391 struct ksmbd_startup_request *req; 392 393 req = nla_data(info->attrs[info->genlhdr->cmd]); 394 ret = ipc_server_config_on_startup(req); 395 if (ret) 396 goto out; 397 server_queue_ctrl_init_work(); 398 } 399 400 ksmbd_tools_pid = info->snd_portid; 401 ipc_update_last_active(); 402 403 out: 404 mutex_unlock(&startup_lock); 405 return ret; 406 } 407 408 static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info) 409 { 410 pr_err("Unknown IPC event: %d, ignore.\n", info->genlhdr->cmd); 411 return -EINVAL; 412 } 413 414 static int handle_generic_event(struct sk_buff *skb, struct genl_info *info) 415 { 416 void *payload; 417 int sz; 418 int type = info->genlhdr->cmd; 419 420 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN 421 if (!netlink_capable(skb, CAP_NET_ADMIN)) 422 return -EPERM; 423 #endif 424 425 if (type > KSMBD_EVENT_MAX) { 426 WARN_ON(1); 427 return -EINVAL; 428 } 429 430 if (!ksmbd_ipc_validate_version(info)) 431 return -EINVAL; 432 433 if (!info->attrs[type]) 434 return -EINVAL; 435 436 payload = nla_data(info->attrs[info->genlhdr->cmd]); 437 sz = nla_len(info->attrs[info->genlhdr->cmd]); 438 return handle_response(type, payload, sz); 439 } 440 441 static int ipc_msg_send(struct ksmbd_ipc_msg *msg) 442 { 443 struct genlmsghdr *nlh; 444 struct sk_buff *skb; 445 int ret = -EINVAL; 446 447 if (!ksmbd_tools_pid) 448 return ret; 449 450 skb = genlmsg_new(msg->sz, KSMBD_DEFAULT_GFP); 451 if (!skb) 452 return -ENOMEM; 453 454 nlh = genlmsg_put(skb, 0, 0, &ksmbd_genl_family, 0, msg->type); 455 if (!nlh) 456 goto out; 457 458 ret = nla_put(skb, msg->type, msg->sz, msg->payload); 459 if (ret) { 460 genlmsg_cancel(skb, nlh); 461 goto out; 462 } 463 464 genlmsg_end(skb, nlh); 465 ret = genlmsg_unicast(&init_net, skb, ksmbd_tools_pid); 466 if (!ret) 467 ipc_update_last_active(); 468 return ret; 469 470 out: 471 nlmsg_free(skb); 472 return ret; 473 } 474 475 static int ipc_validate_msg(struct ipc_msg_table_entry *entry) 476 { 477 unsigned int msg_sz = entry->msg_sz; 478 479 switch (entry->type) { 480 case KSMBD_EVENT_RPC_REQUEST: 481 { 482 struct ksmbd_rpc_command *resp = entry->response; 483 484 msg_sz = sizeof(struct ksmbd_rpc_command) + resp->payload_sz; 485 break; 486 } 487 case KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST: 488 { 489 struct ksmbd_spnego_authen_response *resp = entry->response; 490 491 msg_sz = sizeof(struct ksmbd_spnego_authen_response) + 492 resp->session_key_len + resp->spnego_blob_len; 493 break; 494 } 495 case KSMBD_EVENT_SHARE_CONFIG_REQUEST: 496 { 497 struct ksmbd_share_config_response *resp = entry->response; 498 499 if (resp->payload_sz) { 500 if (resp->payload_sz < resp->veto_list_sz) 501 return -EINVAL; 502 503 msg_sz = sizeof(struct ksmbd_share_config_response) + 504 resp->payload_sz; 505 } 506 break; 507 } 508 case KSMBD_EVENT_LOGIN_REQUEST_EXT: 509 { 510 struct ksmbd_login_response_ext *resp = entry->response; 511 512 if (resp->ngroups) { 513 msg_sz = sizeof(struct ksmbd_login_response_ext) + 514 resp->ngroups * sizeof(gid_t); 515 } 516 } 517 } 518 519 return entry->msg_sz != msg_sz ? -EINVAL : 0; 520 } 521 522 static void *ipc_msg_send_request(struct ksmbd_ipc_msg *msg, unsigned int handle) 523 { 524 struct ipc_msg_table_entry entry; 525 int ret; 526 527 if ((int)handle < 0) 528 return NULL; 529 530 entry.type = msg->type; 531 entry.response = NULL; 532 init_waitqueue_head(&entry.wait); 533 534 down_write(&ipc_msg_table_lock); 535 entry.handle = handle; 536 hash_add(ipc_msg_table, &entry.ipc_table_hlist, entry.handle); 537 up_write(&ipc_msg_table_lock); 538 539 ret = ipc_msg_send(msg); 540 if (ret) 541 goto out; 542 543 ret = wait_event_interruptible_timeout(entry.wait, 544 entry.response != NULL, 545 IPC_WAIT_TIMEOUT); 546 if (entry.response) { 547 ret = ipc_validate_msg(&entry); 548 if (ret) { 549 kvfree(entry.response); 550 entry.response = NULL; 551 } 552 } 553 out: 554 down_write(&ipc_msg_table_lock); 555 hash_del(&entry.ipc_table_hlist); 556 up_write(&ipc_msg_table_lock); 557 return entry.response; 558 } 559 560 static int ksmbd_ipc_heartbeat_request(void) 561 { 562 struct ksmbd_ipc_msg *msg; 563 int ret; 564 565 msg = ipc_msg_alloc(sizeof(struct ksmbd_heartbeat)); 566 if (!msg) 567 return -EINVAL; 568 569 msg->type = KSMBD_EVENT_HEARTBEAT_REQUEST; 570 ret = ipc_msg_send(msg); 571 ipc_msg_free(msg); 572 return ret; 573 } 574 575 struct ksmbd_login_response *ksmbd_ipc_login_request(const char *account) 576 { 577 struct ksmbd_ipc_msg *msg; 578 struct ksmbd_login_request *req; 579 struct ksmbd_login_response *resp; 580 581 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 582 return NULL; 583 584 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); 585 if (!msg) 586 return NULL; 587 588 msg->type = KSMBD_EVENT_LOGIN_REQUEST; 589 req = (struct ksmbd_login_request *)msg->payload; 590 req->handle = ksmbd_acquire_id(&ipc_ida); 591 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 592 593 resp = ipc_msg_send_request(msg, req->handle); 594 ipc_msg_handle_free(req->handle); 595 ipc_msg_free(msg); 596 return resp; 597 } 598 599 struct ksmbd_login_response_ext *ksmbd_ipc_login_request_ext(const char *account) 600 { 601 struct ksmbd_ipc_msg *msg; 602 struct ksmbd_login_request *req; 603 struct ksmbd_login_response_ext *resp; 604 605 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 606 return NULL; 607 608 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); 609 if (!msg) 610 return NULL; 611 612 msg->type = KSMBD_EVENT_LOGIN_REQUEST_EXT; 613 req = (struct ksmbd_login_request *)msg->payload; 614 req->handle = ksmbd_acquire_id(&ipc_ida); 615 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 616 resp = ipc_msg_send_request(msg, req->handle); 617 ipc_msg_handle_free(req->handle); 618 ipc_msg_free(msg); 619 return resp; 620 } 621 622 struct ksmbd_spnego_authen_response * 623 ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len) 624 { 625 struct ksmbd_ipc_msg *msg; 626 struct ksmbd_spnego_authen_request *req; 627 struct ksmbd_spnego_authen_response *resp; 628 629 msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) + 630 blob_len + 1); 631 if (!msg) 632 return NULL; 633 634 msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST; 635 req = (struct ksmbd_spnego_authen_request *)msg->payload; 636 req->handle = ksmbd_acquire_id(&ipc_ida); 637 req->spnego_blob_len = blob_len; 638 memcpy(req->spnego_blob, spnego_blob, blob_len); 639 640 resp = ipc_msg_send_request(msg, req->handle); 641 ipc_msg_handle_free(req->handle); 642 ipc_msg_free(msg); 643 return resp; 644 } 645 646 struct ksmbd_tree_connect_response * 647 ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess, 648 struct ksmbd_share_config *share, 649 struct ksmbd_tree_connect *tree_conn, 650 struct sockaddr *peer_addr) 651 { 652 struct ksmbd_ipc_msg *msg; 653 struct ksmbd_tree_connect_request *req; 654 struct ksmbd_tree_connect_response *resp; 655 656 if (strlen(user_name(sess->user)) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 657 return NULL; 658 659 if (strlen(share->name) >= KSMBD_REQ_MAX_SHARE_NAME) 660 return NULL; 661 662 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_connect_request)); 663 if (!msg) 664 return NULL; 665 666 msg->type = KSMBD_EVENT_TREE_CONNECT_REQUEST; 667 req = (struct ksmbd_tree_connect_request *)msg->payload; 668 669 req->handle = ksmbd_acquire_id(&ipc_ida); 670 req->account_flags = sess->user->flags; 671 req->session_id = sess->id; 672 req->connect_id = tree_conn->id; 673 strscpy(req->account, user_name(sess->user), KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 674 strscpy(req->share, share->name, KSMBD_REQ_MAX_SHARE_NAME); 675 snprintf(req->peer_addr, sizeof(req->peer_addr), "%pIS", peer_addr); 676 677 if (peer_addr->sa_family == AF_INET6) 678 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_IPV6; 679 if (test_session_flag(sess, CIFDS_SESSION_FLAG_SMB2)) 680 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_SMB2; 681 682 resp = ipc_msg_send_request(msg, req->handle); 683 ipc_msg_handle_free(req->handle); 684 ipc_msg_free(msg); 685 return resp; 686 } 687 688 int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id, 689 unsigned long long connect_id) 690 { 691 struct ksmbd_ipc_msg *msg; 692 struct ksmbd_tree_disconnect_request *req; 693 int ret; 694 695 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_disconnect_request)); 696 if (!msg) 697 return -ENOMEM; 698 699 msg->type = KSMBD_EVENT_TREE_DISCONNECT_REQUEST; 700 req = (struct ksmbd_tree_disconnect_request *)msg->payload; 701 req->session_id = session_id; 702 req->connect_id = connect_id; 703 704 ret = ipc_msg_send(msg); 705 ipc_msg_free(msg); 706 return ret; 707 } 708 709 int ksmbd_ipc_logout_request(const char *account, int flags) 710 { 711 struct ksmbd_ipc_msg *msg; 712 struct ksmbd_logout_request *req; 713 int ret; 714 715 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) 716 return -EINVAL; 717 718 msg = ipc_msg_alloc(sizeof(struct ksmbd_logout_request)); 719 if (!msg) 720 return -ENOMEM; 721 722 msg->type = KSMBD_EVENT_LOGOUT_REQUEST; 723 req = (struct ksmbd_logout_request *)msg->payload; 724 req->account_flags = flags; 725 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); 726 727 ret = ipc_msg_send(msg); 728 ipc_msg_free(msg); 729 return ret; 730 } 731 732 struct ksmbd_share_config_response * 733 ksmbd_ipc_share_config_request(const char *name) 734 { 735 struct ksmbd_ipc_msg *msg; 736 struct ksmbd_share_config_request *req; 737 struct ksmbd_share_config_response *resp; 738 739 if (strlen(name) >= KSMBD_REQ_MAX_SHARE_NAME) 740 return NULL; 741 742 msg = ipc_msg_alloc(sizeof(struct ksmbd_share_config_request)); 743 if (!msg) 744 return NULL; 745 746 msg->type = KSMBD_EVENT_SHARE_CONFIG_REQUEST; 747 req = (struct ksmbd_share_config_request *)msg->payload; 748 req->handle = ksmbd_acquire_id(&ipc_ida); 749 strscpy(req->share_name, name, KSMBD_REQ_MAX_SHARE_NAME); 750 751 resp = ipc_msg_send_request(msg, req->handle); 752 ipc_msg_handle_free(req->handle); 753 ipc_msg_free(msg); 754 return resp; 755 } 756 757 struct ksmbd_rpc_command *ksmbd_rpc_open(struct ksmbd_session *sess, int handle) 758 { 759 struct ksmbd_ipc_msg *msg; 760 struct ksmbd_rpc_command *req; 761 struct ksmbd_rpc_command *resp; 762 763 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 764 if (!msg) 765 return NULL; 766 767 msg->type = KSMBD_EVENT_RPC_REQUEST; 768 req = (struct ksmbd_rpc_command *)msg->payload; 769 req->handle = handle; 770 req->flags = ksmbd_session_rpc_method(sess, handle); 771 req->flags |= KSMBD_RPC_OPEN_METHOD; 772 req->payload_sz = 0; 773 774 resp = ipc_msg_send_request(msg, req->handle); 775 ipc_msg_free(msg); 776 return resp; 777 } 778 779 struct ksmbd_rpc_command *ksmbd_rpc_close(struct ksmbd_session *sess, int handle) 780 { 781 struct ksmbd_ipc_msg *msg; 782 struct ksmbd_rpc_command *req; 783 struct ksmbd_rpc_command *resp; 784 785 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 786 if (!msg) 787 return NULL; 788 789 msg->type = KSMBD_EVENT_RPC_REQUEST; 790 req = (struct ksmbd_rpc_command *)msg->payload; 791 req->handle = handle; 792 req->flags = ksmbd_session_rpc_method(sess, handle); 793 req->flags |= KSMBD_RPC_CLOSE_METHOD; 794 req->payload_sz = 0; 795 796 resp = ipc_msg_send_request(msg, req->handle); 797 ipc_msg_free(msg); 798 return resp; 799 } 800 801 struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle, 802 void *payload, size_t payload_sz) 803 { 804 struct ksmbd_ipc_msg *msg; 805 struct ksmbd_rpc_command *req; 806 struct ksmbd_rpc_command *resp; 807 808 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 809 if (!msg) 810 return NULL; 811 812 msg->type = KSMBD_EVENT_RPC_REQUEST; 813 req = (struct ksmbd_rpc_command *)msg->payload; 814 req->handle = handle; 815 req->flags = ksmbd_session_rpc_method(sess, handle); 816 req->flags |= rpc_context_flags(sess); 817 req->flags |= KSMBD_RPC_WRITE_METHOD; 818 req->payload_sz = payload_sz; 819 memcpy(req->payload, payload, payload_sz); 820 821 resp = ipc_msg_send_request(msg, req->handle); 822 ipc_msg_free(msg); 823 return resp; 824 } 825 826 struct ksmbd_rpc_command *ksmbd_rpc_read(struct ksmbd_session *sess, int handle) 827 { 828 struct ksmbd_ipc_msg *msg; 829 struct ksmbd_rpc_command *req; 830 struct ksmbd_rpc_command *resp; 831 832 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); 833 if (!msg) 834 return NULL; 835 836 msg->type = KSMBD_EVENT_RPC_REQUEST; 837 req = (struct ksmbd_rpc_command *)msg->payload; 838 req->handle = handle; 839 req->flags = ksmbd_session_rpc_method(sess, handle); 840 req->flags |= rpc_context_flags(sess); 841 req->flags |= KSMBD_RPC_READ_METHOD; 842 req->payload_sz = 0; 843 844 resp = ipc_msg_send_request(msg, req->handle); 845 ipc_msg_free(msg); 846 return resp; 847 } 848 849 struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle, 850 void *payload, size_t payload_sz) 851 { 852 struct ksmbd_ipc_msg *msg; 853 struct ksmbd_rpc_command *req; 854 struct ksmbd_rpc_command *resp; 855 856 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 857 if (!msg) 858 return NULL; 859 860 msg->type = KSMBD_EVENT_RPC_REQUEST; 861 req = (struct ksmbd_rpc_command *)msg->payload; 862 req->handle = handle; 863 req->flags = ksmbd_session_rpc_method(sess, handle); 864 req->flags |= rpc_context_flags(sess); 865 req->flags |= KSMBD_RPC_IOCTL_METHOD; 866 req->payload_sz = payload_sz; 867 memcpy(req->payload, payload, payload_sz); 868 869 resp = ipc_msg_send_request(msg, req->handle); 870 ipc_msg_free(msg); 871 return resp; 872 } 873 874 struct ksmbd_rpc_command *ksmbd_rpc_rap(struct ksmbd_session *sess, void *payload, 875 size_t payload_sz) 876 { 877 struct ksmbd_ipc_msg *msg; 878 struct ksmbd_rpc_command *req; 879 struct ksmbd_rpc_command *resp; 880 881 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); 882 if (!msg) 883 return NULL; 884 885 msg->type = KSMBD_EVENT_RPC_REQUEST; 886 req = (struct ksmbd_rpc_command *)msg->payload; 887 req->handle = ksmbd_acquire_id(&ipc_ida); 888 req->flags = rpc_context_flags(sess); 889 req->flags |= KSMBD_RPC_RAP_METHOD; 890 req->payload_sz = payload_sz; 891 memcpy(req->payload, payload, payload_sz); 892 893 resp = ipc_msg_send_request(msg, req->handle); 894 ipc_msg_handle_free(req->handle); 895 ipc_msg_free(msg); 896 return resp; 897 } 898 899 static int __ipc_heartbeat(void) 900 { 901 unsigned long delta; 902 903 if (!ksmbd_server_running()) 904 return 0; 905 906 if (time_after(jiffies, server_conf.ipc_last_active)) { 907 delta = (jiffies - server_conf.ipc_last_active); 908 } else { 909 ipc_update_last_active(); 910 schedule_delayed_work(&ipc_timer_work, 911 server_conf.ipc_timeout); 912 return 0; 913 } 914 915 if (delta < server_conf.ipc_timeout) { 916 schedule_delayed_work(&ipc_timer_work, 917 server_conf.ipc_timeout - delta); 918 return 0; 919 } 920 921 if (ksmbd_ipc_heartbeat_request() == 0) { 922 schedule_delayed_work(&ipc_timer_work, 923 server_conf.ipc_timeout); 924 return 0; 925 } 926 927 mutex_lock(&startup_lock); 928 WRITE_ONCE(server_conf.state, SERVER_STATE_RESETTING); 929 server_conf.ipc_last_active = 0; 930 ksmbd_tools_pid = 0; 931 pr_err("No IPC daemon response for %lus\n", delta / HZ); 932 mutex_unlock(&startup_lock); 933 return -EINVAL; 934 } 935 936 static void ipc_timer_heartbeat(struct work_struct *w) 937 { 938 if (__ipc_heartbeat()) 939 server_queue_ctrl_reset_work(); 940 } 941 942 int ksmbd_ipc_id_alloc(void) 943 { 944 return ksmbd_acquire_id(&ipc_ida); 945 } 946 947 void ksmbd_rpc_id_free(int handle) 948 { 949 ksmbd_release_id(&ipc_ida, handle); 950 } 951 952 void ksmbd_ipc_release(void) 953 { 954 cancel_delayed_work_sync(&ipc_timer_work); 955 genl_unregister_family(&ksmbd_genl_family); 956 } 957 958 void ksmbd_ipc_soft_reset(void) 959 { 960 mutex_lock(&startup_lock); 961 ksmbd_tools_pid = 0; 962 cancel_delayed_work_sync(&ipc_timer_work); 963 mutex_unlock(&startup_lock); 964 } 965 966 int ksmbd_ipc_init(void) 967 { 968 int ret = 0; 969 970 ksmbd_nl_init_fixup(); 971 INIT_DELAYED_WORK(&ipc_timer_work, ipc_timer_heartbeat); 972 973 ret = genl_register_family(&ksmbd_genl_family); 974 if (ret) { 975 pr_err("Failed to register KSMBD netlink interface %d\n", ret); 976 cancel_delayed_work_sync(&ipc_timer_work); 977 } 978 979 return ret; 980 } 981