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
ksmbd_ipc_validate_version(struct genl_info * m)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
ksmbd_nl_init_fixup(void)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
rpc_context_flags(struct ksmbd_session * sess)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
ipc_update_last_active(void)236 static void ipc_update_last_active(void)
237 {
238 if (server_conf.ipc_timeout)
239 server_conf.ipc_last_active = jiffies;
240 }
241
ipc_msg_alloc(size_t sz)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
ipc_msg_free(struct ksmbd_ipc_msg * msg)253 static void ipc_msg_free(struct ksmbd_ipc_msg *msg)
254 {
255 kvfree(msg);
256 }
257
ipc_msg_handle_free(int handle)258 static void ipc_msg_handle_free(int handle)
259 {
260 if (handle >= 0)
261 ksmbd_release_id(&ipc_ida, handle);
262 }
263
handle_response(int type,void * payload,size_t sz)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
ipc_server_config_on_startup(struct ksmbd_startup_request * req)304 static int ipc_server_config_on_startup(struct ksmbd_startup_request *req)
305 {
306 int ret;
307
308 ksmbd_set_fd_limit(req->file_max);
309 server_conf.flags = req->flags;
310 server_conf.signing = req->signing;
311 server_conf.tcp_port = req->tcp_port;
312 server_conf.ipc_timeout = req->ipc_timeout * HZ;
313 if (check_mul_overflow(req->deadtime, SMB_ECHO_INTERVAL,
314 &server_conf.deadtime)) {
315 ret = -EINVAL;
316 goto out;
317 }
318 server_conf.share_fake_fscaps = req->share_fake_fscaps;
319 ksmbd_init_domain(req->sub_auth);
320
321 if (req->smb2_max_read)
322 init_smb2_max_read_size(req->smb2_max_read);
323 if (req->smb2_max_write)
324 init_smb2_max_write_size(req->smb2_max_write);
325 if (req->smb2_max_trans)
326 init_smb2_max_trans_size(req->smb2_max_trans);
327 if (req->smb2_max_credits) {
328 init_smb2_max_credits(req->smb2_max_credits);
329 server_conf.max_inflight_req =
330 req->smb2_max_credits;
331 }
332 if (req->smbd_max_io_size)
333 init_smbd_max_io_size(req->smbd_max_io_size);
334
335 if (req->max_connections)
336 server_conf.max_connections = req->max_connections;
337
338 ret = ksmbd_set_netbios_name(req->netbios_name);
339 ret |= ksmbd_set_server_string(req->server_string);
340 ret |= ksmbd_set_work_group(req->work_group);
341 server_conf.bind_interfaces_only = req->bind_interfaces_only;
342 ret |= ksmbd_tcp_set_interfaces(KSMBD_STARTUP_CONFIG_INTERFACES(req),
343 req->ifc_list_sz);
344 out:
345 if (ret) {
346 pr_err("Server configuration error: %s %s %s\n",
347 req->netbios_name, req->server_string,
348 req->work_group);
349 return ret;
350 }
351
352 if (req->min_prot[0]) {
353 ret = ksmbd_lookup_protocol_idx(req->min_prot);
354 if (ret >= 0)
355 server_conf.min_protocol = ret;
356 }
357 if (req->max_prot[0]) {
358 ret = ksmbd_lookup_protocol_idx(req->max_prot);
359 if (ret >= 0)
360 server_conf.max_protocol = ret;
361 }
362
363 if (server_conf.ipc_timeout)
364 schedule_delayed_work(&ipc_timer_work, server_conf.ipc_timeout);
365 return 0;
366 }
367
handle_startup_event(struct sk_buff * skb,struct genl_info * info)368 static int handle_startup_event(struct sk_buff *skb, struct genl_info *info)
369 {
370 int ret = 0;
371
372 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN
373 if (!netlink_capable(skb, CAP_NET_ADMIN))
374 return -EPERM;
375 #endif
376
377 if (!ksmbd_ipc_validate_version(info))
378 return -EINVAL;
379
380 if (!info->attrs[KSMBD_EVENT_STARTING_UP])
381 return -EINVAL;
382
383 mutex_lock(&startup_lock);
384 if (!ksmbd_server_configurable()) {
385 mutex_unlock(&startup_lock);
386 pr_err("Server reset is in progress, can't start daemon\n");
387 return -EINVAL;
388 }
389
390 if (ksmbd_tools_pid) {
391 if (ksmbd_ipc_heartbeat_request() == 0) {
392 ret = -EINVAL;
393 goto out;
394 }
395
396 pr_err("Reconnect to a new user space daemon\n");
397 } else {
398 struct ksmbd_startup_request *req;
399
400 req = nla_data(info->attrs[info->genlhdr->cmd]);
401 ret = ipc_server_config_on_startup(req);
402 if (ret)
403 goto out;
404 server_queue_ctrl_init_work();
405 }
406
407 ksmbd_tools_pid = info->snd_portid;
408 ipc_update_last_active();
409
410 out:
411 mutex_unlock(&startup_lock);
412 return ret;
413 }
414
handle_unsupported_event(struct sk_buff * skb,struct genl_info * info)415 static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info)
416 {
417 pr_err("Unknown IPC event: %d, ignore.\n", info->genlhdr->cmd);
418 return -EINVAL;
419 }
420
handle_generic_event(struct sk_buff * skb,struct genl_info * info)421 static int handle_generic_event(struct sk_buff *skb, struct genl_info *info)
422 {
423 void *payload;
424 int sz;
425 int type = info->genlhdr->cmd;
426
427 #ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN
428 if (!netlink_capable(skb, CAP_NET_ADMIN))
429 return -EPERM;
430 #endif
431
432 if (type > KSMBD_EVENT_MAX) {
433 WARN_ON(1);
434 return -EINVAL;
435 }
436
437 if (!ksmbd_ipc_validate_version(info))
438 return -EINVAL;
439
440 if (!info->attrs[type])
441 return -EINVAL;
442
443 payload = nla_data(info->attrs[info->genlhdr->cmd]);
444 sz = nla_len(info->attrs[info->genlhdr->cmd]);
445 return handle_response(type, payload, sz);
446 }
447
ipc_msg_send(struct ksmbd_ipc_msg * msg)448 static int ipc_msg_send(struct ksmbd_ipc_msg *msg)
449 {
450 struct genlmsghdr *nlh;
451 struct sk_buff *skb;
452 int ret = -EINVAL;
453
454 if (!ksmbd_tools_pid)
455 return ret;
456
457 skb = genlmsg_new(msg->sz, KSMBD_DEFAULT_GFP);
458 if (!skb)
459 return -ENOMEM;
460
461 nlh = genlmsg_put(skb, 0, 0, &ksmbd_genl_family, 0, msg->type);
462 if (!nlh)
463 goto out;
464
465 ret = nla_put(skb, msg->type, msg->sz, msg->payload);
466 if (ret) {
467 genlmsg_cancel(skb, nlh);
468 goto out;
469 }
470
471 genlmsg_end(skb, nlh);
472 ret = genlmsg_unicast(&init_net, skb, ksmbd_tools_pid);
473 if (!ret)
474 ipc_update_last_active();
475 return ret;
476
477 out:
478 nlmsg_free(skb);
479 return ret;
480 }
481
ipc_validate_msg(struct ipc_msg_table_entry * entry)482 static int ipc_validate_msg(struct ipc_msg_table_entry *entry)
483 {
484 unsigned int msg_sz = entry->msg_sz;
485
486 switch (entry->type) {
487 case KSMBD_EVENT_RPC_REQUEST:
488 {
489 struct ksmbd_rpc_command *resp = entry->response;
490
491 msg_sz = sizeof(struct ksmbd_rpc_command) + resp->payload_sz;
492 break;
493 }
494 case KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST:
495 {
496 struct ksmbd_spnego_authen_response *resp = entry->response;
497
498 msg_sz = sizeof(struct ksmbd_spnego_authen_response) +
499 resp->session_key_len + resp->spnego_blob_len;
500 break;
501 }
502 case KSMBD_EVENT_SHARE_CONFIG_REQUEST:
503 {
504 struct ksmbd_share_config_response *resp = entry->response;
505
506 if (resp->payload_sz) {
507 if (resp->payload_sz < resp->veto_list_sz)
508 return -EINVAL;
509
510 msg_sz = sizeof(struct ksmbd_share_config_response) +
511 resp->payload_sz;
512 }
513 break;
514 }
515 case KSMBD_EVENT_LOGIN_REQUEST_EXT:
516 {
517 struct ksmbd_login_response_ext *resp = entry->response;
518
519 if (resp->ngroups) {
520 msg_sz = sizeof(struct ksmbd_login_response_ext) +
521 resp->ngroups * sizeof(gid_t);
522 }
523 }
524 }
525
526 return entry->msg_sz != msg_sz ? -EINVAL : 0;
527 }
528
ipc_msg_send_request(struct ksmbd_ipc_msg * msg,unsigned int handle)529 static void *ipc_msg_send_request(struct ksmbd_ipc_msg *msg, unsigned int handle)
530 {
531 struct ipc_msg_table_entry entry;
532 int ret;
533
534 if ((int)handle < 0)
535 return NULL;
536
537 entry.type = msg->type;
538 entry.response = NULL;
539 init_waitqueue_head(&entry.wait);
540
541 down_write(&ipc_msg_table_lock);
542 entry.handle = handle;
543 hash_add(ipc_msg_table, &entry.ipc_table_hlist, entry.handle);
544 up_write(&ipc_msg_table_lock);
545
546 ret = ipc_msg_send(msg);
547 if (ret)
548 goto out;
549
550 ret = wait_event_interruptible_timeout(entry.wait,
551 entry.response != NULL,
552 IPC_WAIT_TIMEOUT);
553 if (entry.response) {
554 ret = ipc_validate_msg(&entry);
555 if (ret) {
556 kvfree(entry.response);
557 entry.response = NULL;
558 }
559 }
560 out:
561 down_write(&ipc_msg_table_lock);
562 hash_del(&entry.ipc_table_hlist);
563 up_write(&ipc_msg_table_lock);
564 return entry.response;
565 }
566
ksmbd_ipc_heartbeat_request(void)567 static int ksmbd_ipc_heartbeat_request(void)
568 {
569 struct ksmbd_ipc_msg *msg;
570 int ret;
571
572 msg = ipc_msg_alloc(sizeof(struct ksmbd_heartbeat));
573 if (!msg)
574 return -EINVAL;
575
576 msg->type = KSMBD_EVENT_HEARTBEAT_REQUEST;
577 ret = ipc_msg_send(msg);
578 ipc_msg_free(msg);
579 return ret;
580 }
581
ksmbd_ipc_login_request(const char * account)582 struct ksmbd_login_response *ksmbd_ipc_login_request(const char *account)
583 {
584 struct ksmbd_ipc_msg *msg;
585 struct ksmbd_login_request *req;
586 struct ksmbd_login_response *resp;
587
588 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
589 return NULL;
590
591 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request));
592 if (!msg)
593 return NULL;
594
595 msg->type = KSMBD_EVENT_LOGIN_REQUEST;
596 req = (struct ksmbd_login_request *)msg->payload;
597 req->handle = ksmbd_acquire_id(&ipc_ida);
598 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
599
600 resp = ipc_msg_send_request(msg, req->handle);
601 ipc_msg_handle_free(req->handle);
602 ipc_msg_free(msg);
603 return resp;
604 }
605
ksmbd_ipc_login_request_ext(const char * account)606 struct ksmbd_login_response_ext *ksmbd_ipc_login_request_ext(const char *account)
607 {
608 struct ksmbd_ipc_msg *msg;
609 struct ksmbd_login_request *req;
610 struct ksmbd_login_response_ext *resp;
611
612 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
613 return NULL;
614
615 msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request));
616 if (!msg)
617 return NULL;
618
619 msg->type = KSMBD_EVENT_LOGIN_REQUEST_EXT;
620 req = (struct ksmbd_login_request *)msg->payload;
621 req->handle = ksmbd_acquire_id(&ipc_ida);
622 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
623 resp = ipc_msg_send_request(msg, req->handle);
624 ipc_msg_handle_free(req->handle);
625 ipc_msg_free(msg);
626 return resp;
627 }
628
629 struct ksmbd_spnego_authen_response *
ksmbd_ipc_spnego_authen_request(const char * spnego_blob,int blob_len)630 ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len)
631 {
632 struct ksmbd_ipc_msg *msg;
633 struct ksmbd_spnego_authen_request *req;
634 struct ksmbd_spnego_authen_response *resp;
635
636 if (blob_len > KSMBD_IPC_MAX_PAYLOAD)
637 return NULL;
638
639 msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) +
640 blob_len + 1);
641 if (!msg)
642 return NULL;
643
644 msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST;
645 req = (struct ksmbd_spnego_authen_request *)msg->payload;
646 req->handle = ksmbd_acquire_id(&ipc_ida);
647 req->spnego_blob_len = blob_len;
648 memcpy(req->spnego_blob, spnego_blob, blob_len);
649
650 resp = ipc_msg_send_request(msg, req->handle);
651 ipc_msg_handle_free(req->handle);
652 ipc_msg_free(msg);
653 return resp;
654 }
655
656 struct ksmbd_tree_connect_response *
ksmbd_ipc_tree_connect_request(struct ksmbd_session * sess,struct ksmbd_share_config * share,struct ksmbd_tree_connect * tree_conn,struct sockaddr * peer_addr)657 ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess,
658 struct ksmbd_share_config *share,
659 struct ksmbd_tree_connect *tree_conn,
660 struct sockaddr *peer_addr)
661 {
662 struct ksmbd_ipc_msg *msg;
663 struct ksmbd_tree_connect_request *req;
664 struct ksmbd_tree_connect_response *resp;
665
666 if (strlen(user_name(sess->user)) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
667 return NULL;
668
669 if (strlen(share->name) >= KSMBD_REQ_MAX_SHARE_NAME)
670 return NULL;
671
672 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_connect_request));
673 if (!msg)
674 return NULL;
675
676 msg->type = KSMBD_EVENT_TREE_CONNECT_REQUEST;
677 req = (struct ksmbd_tree_connect_request *)msg->payload;
678
679 req->handle = ksmbd_acquire_id(&ipc_ida);
680 req->account_flags = sess->user->flags;
681 req->session_id = sess->id;
682 req->connect_id = tree_conn->id;
683 strscpy(req->account, user_name(sess->user), KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
684 strscpy(req->share, share->name, KSMBD_REQ_MAX_SHARE_NAME);
685 snprintf(req->peer_addr, sizeof(req->peer_addr), "%pIS", peer_addr);
686
687 if (peer_addr->sa_family == AF_INET6)
688 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_IPV6;
689 if (test_session_flag(sess, CIFDS_SESSION_FLAG_SMB2))
690 req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_SMB2;
691
692 resp = ipc_msg_send_request(msg, req->handle);
693 ipc_msg_handle_free(req->handle);
694 ipc_msg_free(msg);
695 return resp;
696 }
697
ksmbd_ipc_tree_disconnect_request(unsigned long long session_id,unsigned long long connect_id)698 int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id,
699 unsigned long long connect_id)
700 {
701 struct ksmbd_ipc_msg *msg;
702 struct ksmbd_tree_disconnect_request *req;
703 int ret;
704
705 msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_disconnect_request));
706 if (!msg)
707 return -ENOMEM;
708
709 msg->type = KSMBD_EVENT_TREE_DISCONNECT_REQUEST;
710 req = (struct ksmbd_tree_disconnect_request *)msg->payload;
711 req->session_id = session_id;
712 req->connect_id = connect_id;
713
714 ret = ipc_msg_send(msg);
715 ipc_msg_free(msg);
716 return ret;
717 }
718
ksmbd_ipc_logout_request(const char * account,int flags)719 int ksmbd_ipc_logout_request(const char *account, int flags)
720 {
721 struct ksmbd_ipc_msg *msg;
722 struct ksmbd_logout_request *req;
723 int ret;
724
725 if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ)
726 return -EINVAL;
727
728 msg = ipc_msg_alloc(sizeof(struct ksmbd_logout_request));
729 if (!msg)
730 return -ENOMEM;
731
732 msg->type = KSMBD_EVENT_LOGOUT_REQUEST;
733 req = (struct ksmbd_logout_request *)msg->payload;
734 req->account_flags = flags;
735 strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
736
737 ret = ipc_msg_send(msg);
738 ipc_msg_free(msg);
739 return ret;
740 }
741
742 struct ksmbd_share_config_response *
ksmbd_ipc_share_config_request(const char * name)743 ksmbd_ipc_share_config_request(const char *name)
744 {
745 struct ksmbd_ipc_msg *msg;
746 struct ksmbd_share_config_request *req;
747 struct ksmbd_share_config_response *resp;
748
749 if (strlen(name) >= KSMBD_REQ_MAX_SHARE_NAME)
750 return NULL;
751
752 msg = ipc_msg_alloc(sizeof(struct ksmbd_share_config_request));
753 if (!msg)
754 return NULL;
755
756 msg->type = KSMBD_EVENT_SHARE_CONFIG_REQUEST;
757 req = (struct ksmbd_share_config_request *)msg->payload;
758 req->handle = ksmbd_acquire_id(&ipc_ida);
759 strscpy(req->share_name, name, KSMBD_REQ_MAX_SHARE_NAME);
760
761 resp = ipc_msg_send_request(msg, req->handle);
762 ipc_msg_handle_free(req->handle);
763 ipc_msg_free(msg);
764 return resp;
765 }
766
ksmbd_rpc_open(struct ksmbd_session * sess,int handle)767 struct ksmbd_rpc_command *ksmbd_rpc_open(struct ksmbd_session *sess, int handle)
768 {
769 struct ksmbd_ipc_msg *msg;
770 struct ksmbd_rpc_command *req;
771 struct ksmbd_rpc_command *resp;
772
773 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
774 if (!msg)
775 return NULL;
776
777 msg->type = KSMBD_EVENT_RPC_REQUEST;
778 req = (struct ksmbd_rpc_command *)msg->payload;
779 req->handle = handle;
780 req->flags = ksmbd_session_rpc_method(sess, handle);
781 req->flags |= KSMBD_RPC_OPEN_METHOD;
782 req->payload_sz = 0;
783
784 resp = ipc_msg_send_request(msg, req->handle);
785 ipc_msg_free(msg);
786 return resp;
787 }
788
ksmbd_rpc_close(struct ksmbd_session * sess,int handle)789 struct ksmbd_rpc_command *ksmbd_rpc_close(struct ksmbd_session *sess, int handle)
790 {
791 struct ksmbd_ipc_msg *msg;
792 struct ksmbd_rpc_command *req;
793 struct ksmbd_rpc_command *resp;
794
795 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
796 if (!msg)
797 return NULL;
798
799 msg->type = KSMBD_EVENT_RPC_REQUEST;
800 req = (struct ksmbd_rpc_command *)msg->payload;
801 req->handle = handle;
802 req->flags = ksmbd_session_rpc_method(sess, handle);
803 req->flags |= KSMBD_RPC_CLOSE_METHOD;
804 req->payload_sz = 0;
805
806 resp = ipc_msg_send_request(msg, req->handle);
807 ipc_msg_free(msg);
808 return resp;
809 }
810
ksmbd_rpc_write(struct ksmbd_session * sess,int handle,void * payload,size_t payload_sz)811 struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle,
812 void *payload, size_t payload_sz)
813 {
814 struct ksmbd_ipc_msg *msg;
815 struct ksmbd_rpc_command *req;
816 struct ksmbd_rpc_command *resp;
817
818 if (payload_sz > KSMBD_IPC_MAX_PAYLOAD)
819 return NULL;
820
821 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
822 if (!msg)
823 return NULL;
824
825 msg->type = KSMBD_EVENT_RPC_REQUEST;
826 req = (struct ksmbd_rpc_command *)msg->payload;
827 req->handle = handle;
828 req->flags = ksmbd_session_rpc_method(sess, handle);
829 req->flags |= rpc_context_flags(sess);
830 req->flags |= KSMBD_RPC_WRITE_METHOD;
831 req->payload_sz = payload_sz;
832 memcpy(req->payload, payload, payload_sz);
833
834 resp = ipc_msg_send_request(msg, req->handle);
835 ipc_msg_free(msg);
836 return resp;
837 }
838
ksmbd_rpc_read(struct ksmbd_session * sess,int handle)839 struct ksmbd_rpc_command *ksmbd_rpc_read(struct ksmbd_session *sess, int handle)
840 {
841 struct ksmbd_ipc_msg *msg;
842 struct ksmbd_rpc_command *req;
843 struct ksmbd_rpc_command *resp;
844
845 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command));
846 if (!msg)
847 return NULL;
848
849 msg->type = KSMBD_EVENT_RPC_REQUEST;
850 req = (struct ksmbd_rpc_command *)msg->payload;
851 req->handle = handle;
852 req->flags = ksmbd_session_rpc_method(sess, handle);
853 req->flags |= rpc_context_flags(sess);
854 req->flags |= KSMBD_RPC_READ_METHOD;
855 req->payload_sz = 0;
856
857 resp = ipc_msg_send_request(msg, req->handle);
858 ipc_msg_free(msg);
859 return resp;
860 }
861
ksmbd_rpc_ioctl(struct ksmbd_session * sess,int handle,void * payload,size_t payload_sz)862 struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle,
863 void *payload, size_t payload_sz)
864 {
865 struct ksmbd_ipc_msg *msg;
866 struct ksmbd_rpc_command *req;
867 struct ksmbd_rpc_command *resp;
868
869 if (payload_sz > KSMBD_IPC_MAX_PAYLOAD)
870 return NULL;
871
872 msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
873 if (!msg)
874 return NULL;
875
876 msg->type = KSMBD_EVENT_RPC_REQUEST;
877 req = (struct ksmbd_rpc_command *)msg->payload;
878 req->handle = handle;
879 req->flags = ksmbd_session_rpc_method(sess, handle);
880 req->flags |= rpc_context_flags(sess);
881 req->flags |= KSMBD_RPC_IOCTL_METHOD;
882 req->payload_sz = payload_sz;
883 memcpy(req->payload, payload, payload_sz);
884
885 resp = ipc_msg_send_request(msg, req->handle);
886 ipc_msg_free(msg);
887 return resp;
888 }
889
__ipc_heartbeat(void)890 static int __ipc_heartbeat(void)
891 {
892 unsigned long delta;
893
894 if (!ksmbd_server_running())
895 return 0;
896
897 if (time_after(jiffies, server_conf.ipc_last_active)) {
898 delta = (jiffies - server_conf.ipc_last_active);
899 } else {
900 ipc_update_last_active();
901 schedule_delayed_work(&ipc_timer_work,
902 server_conf.ipc_timeout);
903 return 0;
904 }
905
906 if (delta < server_conf.ipc_timeout) {
907 schedule_delayed_work(&ipc_timer_work,
908 server_conf.ipc_timeout - delta);
909 return 0;
910 }
911
912 if (ksmbd_ipc_heartbeat_request() == 0) {
913 schedule_delayed_work(&ipc_timer_work,
914 server_conf.ipc_timeout);
915 return 0;
916 }
917
918 mutex_lock(&startup_lock);
919 WRITE_ONCE(server_conf.state, SERVER_STATE_RESETTING);
920 server_conf.ipc_last_active = 0;
921 ksmbd_tools_pid = 0;
922 pr_err("No IPC daemon response for %lus\n", delta / HZ);
923 mutex_unlock(&startup_lock);
924 return -EINVAL;
925 }
926
ipc_timer_heartbeat(struct work_struct * w)927 static void ipc_timer_heartbeat(struct work_struct *w)
928 {
929 if (__ipc_heartbeat())
930 server_queue_ctrl_reset_work();
931 }
932
ksmbd_ipc_id_alloc(void)933 int ksmbd_ipc_id_alloc(void)
934 {
935 return ksmbd_acquire_id(&ipc_ida);
936 }
937
ksmbd_rpc_id_free(int handle)938 void ksmbd_rpc_id_free(int handle)
939 {
940 ksmbd_release_id(&ipc_ida, handle);
941 }
942
ksmbd_ipc_release(void)943 void ksmbd_ipc_release(void)
944 {
945 cancel_delayed_work_sync(&ipc_timer_work);
946 genl_unregister_family(&ksmbd_genl_family);
947 }
948
ksmbd_ipc_soft_reset(void)949 void ksmbd_ipc_soft_reset(void)
950 {
951 mutex_lock(&startup_lock);
952 ksmbd_tools_pid = 0;
953 cancel_delayed_work_sync(&ipc_timer_work);
954 mutex_unlock(&startup_lock);
955 }
956
ksmbd_ipc_init(void)957 int ksmbd_ipc_init(void)
958 {
959 int ret = 0;
960
961 ksmbd_nl_init_fixup();
962 INIT_DELAYED_WORK(&ipc_timer_work, ipc_timer_heartbeat);
963
964 ret = genl_register_family(&ksmbd_genl_family);
965 if (ret) {
966 pr_err("Failed to register KSMBD netlink interface %d\n", ret);
967 cancel_delayed_work_sync(&ipc_timer_work);
968 }
969
970 return ret;
971 }
972