1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * |
4 | * Author Karsten Keil <kkeil@novell.com> |
5 | * |
6 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> |
7 | */ |
8 | |
9 | #include <linux/slab.h> |
10 | #include <linux/mISDNif.h> |
11 | #include <linux/kthread.h> |
12 | #include <linux/sched.h> |
13 | #include <linux/sched/cputime.h> |
14 | #include <linux/signal.h> |
15 | |
16 | #include "core.h" |
17 | |
18 | static u_int *debug; |
19 | |
20 | static inline void |
21 | _queue_message(struct mISDNstack *st, struct sk_buff *skb) |
22 | { |
23 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
24 | |
25 | if (*debug & DEBUG_QUEUE_FUNC) |
26 | printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n" , |
27 | __func__, hh->prim, hh->id, skb); |
28 | skb_queue_tail(list: &st->msgq, newsk: skb); |
29 | if (likely(!test_bit(mISDN_STACK_STOPPED, &st->status))) { |
30 | test_and_set_bit(mISDN_STACK_WORK, addr: &st->status); |
31 | wake_up_interruptible(&st->workq); |
32 | } |
33 | } |
34 | |
35 | static int |
36 | mISDN_queue_message(struct mISDNchannel *ch, struct sk_buff *skb) |
37 | { |
38 | _queue_message(st: ch->st, skb); |
39 | return 0; |
40 | } |
41 | |
42 | static struct mISDNchannel * |
43 | get_channel4id(struct mISDNstack *st, u_int id) |
44 | { |
45 | struct mISDNchannel *ch; |
46 | |
47 | mutex_lock(&st->lmutex); |
48 | list_for_each_entry(ch, &st->layer2, list) { |
49 | if (id == ch->nr) |
50 | goto unlock; |
51 | } |
52 | ch = NULL; |
53 | unlock: |
54 | mutex_unlock(lock: &st->lmutex); |
55 | return ch; |
56 | } |
57 | |
58 | static void |
59 | send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb) |
60 | { |
61 | struct sock *sk; |
62 | struct sk_buff *cskb = NULL; |
63 | |
64 | read_lock(&sl->lock); |
65 | sk_for_each(sk, &sl->head) { |
66 | if (sk->sk_state != MISDN_BOUND) |
67 | continue; |
68 | if (!cskb) |
69 | cskb = skb_copy(skb, GFP_ATOMIC); |
70 | if (!cskb) { |
71 | printk(KERN_WARNING "%s no skb\n" , __func__); |
72 | break; |
73 | } |
74 | if (!sock_queue_rcv_skb(sk, skb: cskb)) |
75 | cskb = NULL; |
76 | } |
77 | read_unlock(&sl->lock); |
78 | dev_kfree_skb(cskb); |
79 | } |
80 | |
81 | static void |
82 | send_layer2(struct mISDNstack *st, struct sk_buff *skb) |
83 | { |
84 | struct sk_buff *cskb; |
85 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
86 | struct mISDNchannel *ch; |
87 | int ret; |
88 | |
89 | if (!st) |
90 | return; |
91 | mutex_lock(&st->lmutex); |
92 | if ((hh->id & MISDN_ID_ADDR_MASK) == MISDN_ID_ANY) { /* L2 for all */ |
93 | list_for_each_entry(ch, &st->layer2, list) { |
94 | if (list_is_last(list: &ch->list, head: &st->layer2)) { |
95 | cskb = skb; |
96 | skb = NULL; |
97 | } else { |
98 | cskb = skb_copy(skb, GFP_KERNEL); |
99 | } |
100 | if (cskb) { |
101 | ret = ch->send(ch, cskb); |
102 | if (ret) { |
103 | if (*debug & DEBUG_SEND_ERR) |
104 | printk(KERN_DEBUG |
105 | "%s ch%d prim(%x) addr(%x)" |
106 | " err %d\n" , |
107 | __func__, ch->nr, |
108 | hh->prim, ch->addr, ret); |
109 | dev_kfree_skb(cskb); |
110 | } |
111 | } else { |
112 | printk(KERN_WARNING "%s ch%d addr %x no mem\n" , |
113 | __func__, ch->nr, ch->addr); |
114 | goto out; |
115 | } |
116 | } |
117 | } else { |
118 | list_for_each_entry(ch, &st->layer2, list) { |
119 | if ((hh->id & MISDN_ID_ADDR_MASK) == ch->addr) { |
120 | ret = ch->send(ch, skb); |
121 | if (!ret) |
122 | skb = NULL; |
123 | goto out; |
124 | } |
125 | } |
126 | ret = st->dev->teimgr->ctrl(st->dev->teimgr, CHECK_DATA, skb); |
127 | if (!ret) |
128 | skb = NULL; |
129 | else if (*debug & DEBUG_SEND_ERR) |
130 | printk(KERN_DEBUG |
131 | "%s mgr prim(%x) err %d\n" , |
132 | __func__, hh->prim, ret); |
133 | } |
134 | out: |
135 | mutex_unlock(lock: &st->lmutex); |
136 | dev_kfree_skb(skb); |
137 | } |
138 | |
139 | static inline int |
140 | send_msg_to_layer(struct mISDNstack *st, struct sk_buff *skb) |
141 | { |
142 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
143 | struct mISDNchannel *ch; |
144 | int lm; |
145 | |
146 | lm = hh->prim & MISDN_LAYERMASK; |
147 | if (*debug & DEBUG_QUEUE_FUNC) |
148 | printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n" , |
149 | __func__, hh->prim, hh->id, skb); |
150 | if (lm == 0x1) { |
151 | if (!hlist_empty(h: &st->l1sock.head)) { |
152 | __net_timestamp(skb); |
153 | send_socklist(sl: &st->l1sock, skb); |
154 | } |
155 | return st->layer1->send(st->layer1, skb); |
156 | } else if (lm == 0x2) { |
157 | if (!hlist_empty(h: &st->l1sock.head)) |
158 | send_socklist(sl: &st->l1sock, skb); |
159 | send_layer2(st, skb); |
160 | return 0; |
161 | } else if (lm == 0x4) { |
162 | ch = get_channel4id(st, id: hh->id); |
163 | if (ch) |
164 | return ch->send(ch, skb); |
165 | else |
166 | printk(KERN_WARNING |
167 | "%s: dev(%s) prim(%x) id(%x) no channel\n" , |
168 | __func__, dev_name(&st->dev->dev), hh->prim, |
169 | hh->id); |
170 | } else if (lm == 0x8) { |
171 | WARN_ON(lm == 0x8); |
172 | ch = get_channel4id(st, id: hh->id); |
173 | if (ch) |
174 | return ch->send(ch, skb); |
175 | else |
176 | printk(KERN_WARNING |
177 | "%s: dev(%s) prim(%x) id(%x) no channel\n" , |
178 | __func__, dev_name(&st->dev->dev), hh->prim, |
179 | hh->id); |
180 | } else { |
181 | /* broadcast not handled yet */ |
182 | printk(KERN_WARNING "%s: dev(%s) prim %x not delivered\n" , |
183 | __func__, dev_name(&st->dev->dev), hh->prim); |
184 | } |
185 | return -ESRCH; |
186 | } |
187 | |
188 | static void |
189 | do_clear_stack(struct mISDNstack *st) |
190 | { |
191 | } |
192 | |
193 | static int |
194 | mISDNStackd(void *data) |
195 | { |
196 | struct mISDNstack *st = data; |
197 | #ifdef MISDN_MSG_STATS |
198 | u64 utime, stime; |
199 | #endif |
200 | int err = 0; |
201 | |
202 | sigfillset(set: ¤t->blocked); |
203 | if (*debug & DEBUG_MSG_THREAD) |
204 | printk(KERN_DEBUG "mISDNStackd %s started\n" , |
205 | dev_name(&st->dev->dev)); |
206 | |
207 | if (st->notify != NULL) { |
208 | complete(st->notify); |
209 | st->notify = NULL; |
210 | } |
211 | |
212 | for (;;) { |
213 | struct sk_buff *skb; |
214 | |
215 | if (unlikely(test_bit(mISDN_STACK_STOPPED, &st->status))) { |
216 | test_and_clear_bit(mISDN_STACK_WORK, addr: &st->status); |
217 | test_and_clear_bit(mISDN_STACK_RUNNING, addr: &st->status); |
218 | } else |
219 | test_and_set_bit(mISDN_STACK_RUNNING, addr: &st->status); |
220 | while (test_bit(mISDN_STACK_WORK, &st->status)) { |
221 | skb = skb_dequeue(list: &st->msgq); |
222 | if (!skb) { |
223 | test_and_clear_bit(mISDN_STACK_WORK, |
224 | addr: &st->status); |
225 | /* test if a race happens */ |
226 | skb = skb_dequeue(list: &st->msgq); |
227 | if (!skb) |
228 | continue; |
229 | test_and_set_bit(mISDN_STACK_WORK, |
230 | addr: &st->status); |
231 | } |
232 | #ifdef MISDN_MSG_STATS |
233 | st->msg_cnt++; |
234 | #endif |
235 | err = send_msg_to_layer(st, skb); |
236 | if (unlikely(err)) { |
237 | if (*debug & DEBUG_SEND_ERR) |
238 | printk(KERN_DEBUG |
239 | "%s: %s prim(%x) id(%x) " |
240 | "send call(%d)\n" , |
241 | __func__, dev_name(&st->dev->dev), |
242 | mISDN_HEAD_PRIM(skb), |
243 | mISDN_HEAD_ID(skb), err); |
244 | dev_kfree_skb(skb); |
245 | continue; |
246 | } |
247 | if (unlikely(test_bit(mISDN_STACK_STOPPED, |
248 | &st->status))) { |
249 | test_and_clear_bit(mISDN_STACK_WORK, |
250 | addr: &st->status); |
251 | test_and_clear_bit(mISDN_STACK_RUNNING, |
252 | addr: &st->status); |
253 | break; |
254 | } |
255 | } |
256 | if (test_bit(mISDN_STACK_CLEARING, &st->status)) { |
257 | test_and_set_bit(mISDN_STACK_STOPPED, addr: &st->status); |
258 | test_and_clear_bit(mISDN_STACK_RUNNING, addr: &st->status); |
259 | do_clear_stack(st); |
260 | test_and_clear_bit(mISDN_STACK_CLEARING, addr: &st->status); |
261 | test_and_set_bit(mISDN_STACK_RESTART, addr: &st->status); |
262 | } |
263 | if (test_and_clear_bit(mISDN_STACK_RESTART, addr: &st->status)) { |
264 | test_and_clear_bit(mISDN_STACK_STOPPED, addr: &st->status); |
265 | test_and_set_bit(mISDN_STACK_RUNNING, addr: &st->status); |
266 | if (!skb_queue_empty(list: &st->msgq)) |
267 | test_and_set_bit(mISDN_STACK_WORK, |
268 | addr: &st->status); |
269 | } |
270 | if (test_bit(mISDN_STACK_ABORT, &st->status)) |
271 | break; |
272 | if (st->notify != NULL) { |
273 | complete(st->notify); |
274 | st->notify = NULL; |
275 | } |
276 | #ifdef MISDN_MSG_STATS |
277 | st->sleep_cnt++; |
278 | #endif |
279 | test_and_clear_bit(mISDN_STACK_ACTIVE, addr: &st->status); |
280 | wait_event_interruptible(st->workq, (st->status & |
281 | mISDN_STACK_ACTION_MASK)); |
282 | if (*debug & DEBUG_MSG_THREAD) |
283 | printk(KERN_DEBUG "%s: %s wake status %08lx\n" , |
284 | __func__, dev_name(&st->dev->dev), st->status); |
285 | test_and_set_bit(mISDN_STACK_ACTIVE, addr: &st->status); |
286 | |
287 | test_and_clear_bit(mISDN_STACK_WAKEUP, addr: &st->status); |
288 | |
289 | if (test_bit(mISDN_STACK_STOPPED, &st->status)) { |
290 | test_and_clear_bit(mISDN_STACK_RUNNING, addr: &st->status); |
291 | #ifdef MISDN_MSG_STATS |
292 | st->stopped_cnt++; |
293 | #endif |
294 | } |
295 | } |
296 | #ifdef MISDN_MSG_STATS |
297 | printk(KERN_DEBUG "mISDNStackd daemon for %s proceed %d " |
298 | "msg %d sleep %d stopped\n" , |
299 | dev_name(&st->dev->dev), st->msg_cnt, st->sleep_cnt, |
300 | st->stopped_cnt); |
301 | task_cputime(st->thread, &utime, &stime); |
302 | printk(KERN_DEBUG |
303 | "mISDNStackd daemon for %s utime(%llu) stime(%llu)\n" , |
304 | dev_name(&st->dev->dev), utime, stime); |
305 | printk(KERN_DEBUG |
306 | "mISDNStackd daemon for %s nvcsw(%ld) nivcsw(%ld)\n" , |
307 | dev_name(&st->dev->dev), st->thread->nvcsw, st->thread->nivcsw); |
308 | printk(KERN_DEBUG "mISDNStackd daemon for %s killed now\n" , |
309 | dev_name(&st->dev->dev)); |
310 | #endif |
311 | test_and_set_bit(mISDN_STACK_KILLED, addr: &st->status); |
312 | test_and_clear_bit(mISDN_STACK_RUNNING, addr: &st->status); |
313 | test_and_clear_bit(mISDN_STACK_ACTIVE, addr: &st->status); |
314 | test_and_clear_bit(mISDN_STACK_ABORT, addr: &st->status); |
315 | skb_queue_purge(list: &st->msgq); |
316 | st->thread = NULL; |
317 | if (st->notify != NULL) { |
318 | complete(st->notify); |
319 | st->notify = NULL; |
320 | } |
321 | return 0; |
322 | } |
323 | |
324 | static int |
325 | l1_receive(struct mISDNchannel *ch, struct sk_buff *skb) |
326 | { |
327 | if (!ch->st) |
328 | return -ENODEV; |
329 | __net_timestamp(skb); |
330 | _queue_message(st: ch->st, skb); |
331 | return 0; |
332 | } |
333 | |
334 | void |
335 | set_channel_address(struct mISDNchannel *ch, u_int sapi, u_int tei) |
336 | { |
337 | ch->addr = sapi | (tei << 8); |
338 | } |
339 | |
340 | void |
341 | __add_layer2(struct mISDNchannel *ch, struct mISDNstack *st) |
342 | { |
343 | list_add_tail(new: &ch->list, head: &st->layer2); |
344 | } |
345 | |
346 | void |
347 | add_layer2(struct mISDNchannel *ch, struct mISDNstack *st) |
348 | { |
349 | mutex_lock(&st->lmutex); |
350 | __add_layer2(ch, st); |
351 | mutex_unlock(lock: &st->lmutex); |
352 | } |
353 | |
354 | static int |
355 | st_own_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) |
356 | { |
357 | if (!ch->st || !ch->st->layer1) |
358 | return -EINVAL; |
359 | return ch->st->layer1->ctrl(ch->st->layer1, cmd, arg); |
360 | } |
361 | |
362 | int |
363 | create_stack(struct mISDNdevice *dev) |
364 | { |
365 | struct mISDNstack *newst; |
366 | int err; |
367 | DECLARE_COMPLETION_ONSTACK(done); |
368 | |
369 | newst = kzalloc(size: sizeof(struct mISDNstack), GFP_KERNEL); |
370 | if (!newst) { |
371 | printk(KERN_ERR "kmalloc mISDN_stack failed\n" ); |
372 | return -ENOMEM; |
373 | } |
374 | newst->dev = dev; |
375 | INIT_LIST_HEAD(list: &newst->layer2); |
376 | INIT_HLIST_HEAD(&newst->l1sock.head); |
377 | rwlock_init(&newst->l1sock.lock); |
378 | init_waitqueue_head(&newst->workq); |
379 | skb_queue_head_init(list: &newst->msgq); |
380 | mutex_init(&newst->lmutex); |
381 | dev->D.st = newst; |
382 | err = create_teimanager(dev); |
383 | if (err) { |
384 | printk(KERN_ERR "kmalloc teimanager failed\n" ); |
385 | kfree(objp: newst); |
386 | return err; |
387 | } |
388 | dev->teimgr->peer = &newst->own; |
389 | dev->teimgr->recv = mISDN_queue_message; |
390 | dev->teimgr->st = newst; |
391 | newst->layer1 = &dev->D; |
392 | dev->D.recv = l1_receive; |
393 | dev->D.peer = &newst->own; |
394 | newst->own.st = newst; |
395 | newst->own.ctrl = st_own_ctrl; |
396 | newst->own.send = mISDN_queue_message; |
397 | newst->own.recv = mISDN_queue_message; |
398 | if (*debug & DEBUG_CORE_FUNC) |
399 | printk(KERN_DEBUG "%s: st(%s)\n" , __func__, |
400 | dev_name(&newst->dev->dev)); |
401 | newst->notify = &done; |
402 | newst->thread = kthread_run(mISDNStackd, (void *)newst, "mISDN_%s" , |
403 | dev_name(&newst->dev->dev)); |
404 | if (IS_ERR(ptr: newst->thread)) { |
405 | err = PTR_ERR(ptr: newst->thread); |
406 | printk(KERN_ERR |
407 | "mISDN:cannot create kernel thread for %s (%d)\n" , |
408 | dev_name(&newst->dev->dev), err); |
409 | delete_teimanager(dev->teimgr); |
410 | kfree(objp: newst); |
411 | } else |
412 | wait_for_completion(&done); |
413 | return err; |
414 | } |
415 | |
416 | int |
417 | connect_layer1(struct mISDNdevice *dev, struct mISDNchannel *ch, |
418 | u_int protocol, struct sockaddr_mISDN *adr) |
419 | { |
420 | struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch); |
421 | struct channel_req rq; |
422 | int err; |
423 | |
424 | |
425 | if (*debug & DEBUG_CORE_FUNC) |
426 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n" , |
427 | __func__, dev_name(&dev->dev), protocol, adr->dev, |
428 | adr->channel, adr->sapi, adr->tei); |
429 | switch (protocol) { |
430 | case ISDN_P_NT_S0: |
431 | case ISDN_P_NT_E1: |
432 | case ISDN_P_TE_S0: |
433 | case ISDN_P_TE_E1: |
434 | ch->recv = mISDN_queue_message; |
435 | ch->peer = &dev->D.st->own; |
436 | ch->st = dev->D.st; |
437 | rq.protocol = protocol; |
438 | rq.adr.channel = adr->channel; |
439 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); |
440 | printk(KERN_DEBUG "%s: ret %d (dev %d)\n" , __func__, err, |
441 | dev->id); |
442 | if (err) |
443 | return err; |
444 | write_lock_bh(&dev->D.st->l1sock.lock); |
445 | sk_add_node(sk: &msk->sk, list: &dev->D.st->l1sock.head); |
446 | write_unlock_bh(&dev->D.st->l1sock.lock); |
447 | break; |
448 | default: |
449 | return -ENOPROTOOPT; |
450 | } |
451 | return 0; |
452 | } |
453 | |
454 | int |
455 | connect_Bstack(struct mISDNdevice *dev, struct mISDNchannel *ch, |
456 | u_int protocol, struct sockaddr_mISDN *adr) |
457 | { |
458 | struct channel_req rq, rq2; |
459 | int pmask, err; |
460 | struct Bprotocol *bp; |
461 | |
462 | if (*debug & DEBUG_CORE_FUNC) |
463 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n" , |
464 | __func__, dev_name(&dev->dev), protocol, |
465 | adr->dev, adr->channel, adr->sapi, |
466 | adr->tei); |
467 | ch->st = dev->D.st; |
468 | pmask = 1 << (protocol & ISDN_P_B_MASK); |
469 | if (pmask & dev->Bprotocols) { |
470 | rq.protocol = protocol; |
471 | rq.adr = *adr; |
472 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); |
473 | if (err) |
474 | return err; |
475 | ch->recv = rq.ch->send; |
476 | ch->peer = rq.ch; |
477 | rq.ch->recv = ch->send; |
478 | rq.ch->peer = ch; |
479 | rq.ch->st = dev->D.st; |
480 | } else { |
481 | bp = get_Bprotocol4mask(pmask); |
482 | if (!bp) |
483 | return -ENOPROTOOPT; |
484 | rq2.protocol = protocol; |
485 | rq2.adr = *adr; |
486 | rq2.ch = ch; |
487 | err = bp->create(&rq2); |
488 | if (err) |
489 | return err; |
490 | ch->recv = rq2.ch->send; |
491 | ch->peer = rq2.ch; |
492 | rq2.ch->st = dev->D.st; |
493 | rq.protocol = rq2.protocol; |
494 | rq.adr = *adr; |
495 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); |
496 | if (err) { |
497 | rq2.ch->ctrl(rq2.ch, CLOSE_CHANNEL, NULL); |
498 | return err; |
499 | } |
500 | rq2.ch->recv = rq.ch->send; |
501 | rq2.ch->peer = rq.ch; |
502 | rq.ch->recv = rq2.ch->send; |
503 | rq.ch->peer = rq2.ch; |
504 | rq.ch->st = dev->D.st; |
505 | } |
506 | ch->protocol = protocol; |
507 | ch->nr = rq.ch->nr; |
508 | return 0; |
509 | } |
510 | |
511 | int |
512 | create_l2entity(struct mISDNdevice *dev, struct mISDNchannel *ch, |
513 | u_int protocol, struct sockaddr_mISDN *adr) |
514 | { |
515 | struct channel_req rq; |
516 | int err; |
517 | |
518 | if (*debug & DEBUG_CORE_FUNC) |
519 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n" , |
520 | __func__, dev_name(&dev->dev), protocol, |
521 | adr->dev, adr->channel, adr->sapi, |
522 | adr->tei); |
523 | rq.protocol = ISDN_P_TE_S0; |
524 | if (dev->Dprotocols & (1 << ISDN_P_TE_E1)) |
525 | rq.protocol = ISDN_P_TE_E1; |
526 | switch (protocol) { |
527 | case ISDN_P_LAPD_NT: |
528 | rq.protocol = ISDN_P_NT_S0; |
529 | if (dev->Dprotocols & (1 << ISDN_P_NT_E1)) |
530 | rq.protocol = ISDN_P_NT_E1; |
531 | fallthrough; |
532 | case ISDN_P_LAPD_TE: |
533 | ch->recv = mISDN_queue_message; |
534 | ch->peer = &dev->D.st->own; |
535 | ch->st = dev->D.st; |
536 | rq.adr.channel = 0; |
537 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); |
538 | printk(KERN_DEBUG "%s: ret 1 %d\n" , __func__, err); |
539 | if (err) |
540 | break; |
541 | rq.protocol = protocol; |
542 | rq.adr = *adr; |
543 | rq.ch = ch; |
544 | err = dev->teimgr->ctrl(dev->teimgr, OPEN_CHANNEL, &rq); |
545 | printk(KERN_DEBUG "%s: ret 2 %d\n" , __func__, err); |
546 | if (!err) { |
547 | if ((protocol == ISDN_P_LAPD_NT) && !rq.ch) |
548 | break; |
549 | add_layer2(ch: rq.ch, st: dev->D.st); |
550 | rq.ch->recv = mISDN_queue_message; |
551 | rq.ch->peer = &dev->D.st->own; |
552 | rq.ch->ctrl(rq.ch, OPEN_CHANNEL, NULL); /* can't fail */ |
553 | } |
554 | break; |
555 | default: |
556 | err = -EPROTONOSUPPORT; |
557 | } |
558 | return err; |
559 | } |
560 | |
561 | void |
562 | delete_channel(struct mISDNchannel *ch) |
563 | { |
564 | struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch); |
565 | struct mISDNchannel *pch; |
566 | |
567 | if (!ch->st) { |
568 | printk(KERN_WARNING "%s: no stack\n" , __func__); |
569 | return; |
570 | } |
571 | if (*debug & DEBUG_CORE_FUNC) |
572 | printk(KERN_DEBUG "%s: st(%s) protocol(%x)\n" , __func__, |
573 | dev_name(&ch->st->dev->dev), ch->protocol); |
574 | if (ch->protocol >= ISDN_P_B_START) { |
575 | if (ch->peer) { |
576 | ch->peer->ctrl(ch->peer, CLOSE_CHANNEL, NULL); |
577 | ch->peer = NULL; |
578 | } |
579 | return; |
580 | } |
581 | switch (ch->protocol) { |
582 | case ISDN_P_NT_S0: |
583 | case ISDN_P_TE_S0: |
584 | case ISDN_P_NT_E1: |
585 | case ISDN_P_TE_E1: |
586 | write_lock_bh(&ch->st->l1sock.lock); |
587 | sk_del_node_init(sk: &msk->sk); |
588 | write_unlock_bh(&ch->st->l1sock.lock); |
589 | ch->st->dev->D.ctrl(&ch->st->dev->D, CLOSE_CHANNEL, NULL); |
590 | break; |
591 | case ISDN_P_LAPD_TE: |
592 | pch = get_channel4id(st: ch->st, id: ch->nr); |
593 | if (pch) { |
594 | mutex_lock(&ch->st->lmutex); |
595 | list_del(entry: &pch->list); |
596 | mutex_unlock(lock: &ch->st->lmutex); |
597 | pch->ctrl(pch, CLOSE_CHANNEL, NULL); |
598 | pch = ch->st->dev->teimgr; |
599 | pch->ctrl(pch, CLOSE_CHANNEL, NULL); |
600 | } else |
601 | printk(KERN_WARNING "%s: no l2 channel\n" , |
602 | __func__); |
603 | break; |
604 | case ISDN_P_LAPD_NT: |
605 | pch = ch->st->dev->teimgr; |
606 | if (pch) { |
607 | pch->ctrl(pch, CLOSE_CHANNEL, NULL); |
608 | } else |
609 | printk(KERN_WARNING "%s: no l2 channel\n" , |
610 | __func__); |
611 | break; |
612 | default: |
613 | break; |
614 | } |
615 | return; |
616 | } |
617 | |
618 | void |
619 | delete_stack(struct mISDNdevice *dev) |
620 | { |
621 | struct mISDNstack *st = dev->D.st; |
622 | DECLARE_COMPLETION_ONSTACK(done); |
623 | |
624 | if (*debug & DEBUG_CORE_FUNC) |
625 | printk(KERN_DEBUG "%s: st(%s)\n" , __func__, |
626 | dev_name(&st->dev->dev)); |
627 | if (dev->teimgr) |
628 | delete_teimanager(dev->teimgr); |
629 | if (st->thread) { |
630 | if (st->notify) { |
631 | printk(KERN_WARNING "%s: notifier in use\n" , |
632 | __func__); |
633 | complete(st->notify); |
634 | } |
635 | st->notify = &done; |
636 | test_and_set_bit(mISDN_STACK_ABORT, addr: &st->status); |
637 | test_and_set_bit(mISDN_STACK_WAKEUP, addr: &st->status); |
638 | wake_up_interruptible(&st->workq); |
639 | wait_for_completion(&done); |
640 | } |
641 | if (!list_empty(head: &st->layer2)) |
642 | printk(KERN_WARNING "%s: layer2 list not empty\n" , |
643 | __func__); |
644 | if (!hlist_empty(h: &st->l1sock.head)) |
645 | printk(KERN_WARNING "%s: layer1 list not empty\n" , |
646 | __func__); |
647 | kfree(objp: st); |
648 | } |
649 | |
650 | void |
651 | mISDN_initstack(u_int *dp) |
652 | { |
653 | debug = dp; |
654 | } |
655 | |