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