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 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
handle_startup_event(struct sk_buff * skb,struct genl_info * info)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
handle_unsupported_event(struct sk_buff * skb,struct genl_info * info)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
handle_generic_event(struct sk_buff * skb,struct genl_info * info)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
ipc_msg_send(struct ksmbd_ipc_msg * msg)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
ipc_validate_msg(struct ipc_msg_table_entry * entry)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
ipc_msg_send_request(struct ksmbd_ipc_msg * msg,unsigned int handle)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
ksmbd_ipc_heartbeat_request(void)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
ksmbd_ipc_login_request(const char * account)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
ksmbd_ipc_login_request_ext(const char * account)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 *
ksmbd_ipc_spnego_authen_request(const char * spnego_blob,int blob_len)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 *
ksmbd_ipc_tree_connect_request(struct ksmbd_session * sess,struct ksmbd_share_config * share,struct ksmbd_tree_connect * tree_conn,struct sockaddr * peer_addr)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
ksmbd_ipc_tree_disconnect_request(unsigned long long session_id,unsigned long long connect_id)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
ksmbd_ipc_logout_request(const char * account,int flags)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 *
ksmbd_ipc_share_config_request(const char * name)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
ksmbd_rpc_open(struct ksmbd_session * sess,int handle)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
ksmbd_rpc_close(struct ksmbd_session * sess,int handle)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
ksmbd_rpc_write(struct ksmbd_session * sess,int handle,void * payload,size_t payload_sz)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
ksmbd_rpc_read(struct ksmbd_session * sess,int handle)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
ksmbd_rpc_ioctl(struct ksmbd_session * sess,int handle,void * payload,size_t payload_sz)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
__ipc_heartbeat(void)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
ipc_timer_heartbeat(struct work_struct * w)922 static void ipc_timer_heartbeat(struct work_struct *w)
923 {
924 if (__ipc_heartbeat())
925 server_queue_ctrl_reset_work();
926 }
927
ksmbd_ipc_id_alloc(void)928 int ksmbd_ipc_id_alloc(void)
929 {
930 return ksmbd_acquire_id(&ipc_ida);
931 }
932
ksmbd_rpc_id_free(int handle)933 void ksmbd_rpc_id_free(int handle)
934 {
935 ksmbd_release_id(&ipc_ida, handle);
936 }
937
ksmbd_ipc_release(void)938 void ksmbd_ipc_release(void)
939 {
940 cancel_delayed_work_sync(&ipc_timer_work);
941 genl_unregister_family(&ksmbd_genl_family);
942 }
943
ksmbd_ipc_soft_reset(void)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
ksmbd_ipc_init(void)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