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1b2b03f8 KK |
1 | /* |
2 | * | |
3 | * Author Karsten Keil <kkeil@novell.com> | |
4 | * | |
5 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/mISDNif.h> | |
19 | #include <linux/kthread.h> | |
20 | #include "core.h" | |
21 | ||
22 | static u_int *debug; | |
23 | ||
24 | static inline void | |
25 | _queue_message(struct mISDNstack *st, struct sk_buff *skb) | |
26 | { | |
27 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
28 | ||
29 | if (*debug & DEBUG_QUEUE_FUNC) | |
30 | printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n", | |
31 | __func__, hh->prim, hh->id, skb); | |
32 | skb_queue_tail(&st->msgq, skb); | |
33 | if (likely(!test_bit(mISDN_STACK_STOPPED, &st->status))) { | |
34 | test_and_set_bit(mISDN_STACK_WORK, &st->status); | |
35 | wake_up_interruptible(&st->workq); | |
36 | } | |
37 | } | |
38 | ||
39 | int | |
40 | mISDN_queue_message(struct mISDNchannel *ch, struct sk_buff *skb) | |
41 | { | |
42 | _queue_message(ch->st, skb); | |
43 | return 0; | |
44 | } | |
45 | ||
46 | static struct mISDNchannel * | |
47 | get_channel4id(struct mISDNstack *st, u_int id) | |
48 | { | |
49 | struct mISDNchannel *ch; | |
50 | ||
51 | mutex_lock(&st->lmutex); | |
52 | list_for_each_entry(ch, &st->layer2, list) { | |
53 | if (id == ch->nr) | |
54 | goto unlock; | |
55 | } | |
56 | ch = NULL; | |
57 | unlock: | |
58 | mutex_unlock(&st->lmutex); | |
59 | return ch; | |
60 | } | |
61 | ||
62 | static void | |
63 | send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb) | |
64 | { | |
65 | struct hlist_node *node; | |
66 | struct sock *sk; | |
67 | struct sk_buff *cskb = NULL; | |
68 | ||
69 | read_lock(&sl->lock); | |
70 | sk_for_each(sk, node, &sl->head) { | |
71 | if (sk->sk_state != MISDN_BOUND) | |
72 | continue; | |
73 | if (!cskb) | |
74 | cskb = skb_copy(skb, GFP_KERNEL); | |
75 | if (!cskb) { | |
76 | printk(KERN_WARNING "%s no skb\n", __func__); | |
77 | break; | |
78 | } | |
79 | if (!sock_queue_rcv_skb(sk, cskb)) | |
80 | cskb = NULL; | |
81 | } | |
82 | read_unlock(&sl->lock); | |
83 | if (cskb) | |
84 | dev_kfree_skb(cskb); | |
85 | } | |
86 | ||
87 | static void | |
88 | send_layer2(struct mISDNstack *st, struct sk_buff *skb) | |
89 | { | |
90 | struct sk_buff *cskb; | |
91 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
92 | struct mISDNchannel *ch; | |
93 | int ret; | |
94 | ||
95 | if (!st) | |
96 | return; | |
97 | mutex_lock(&st->lmutex); | |
98 | if ((hh->id & MISDN_ID_ADDR_MASK) == MISDN_ID_ANY) { /* L2 for all */ | |
99 | list_for_each_entry(ch, &st->layer2, list) { | |
100 | if (list_is_last(&ch->list, &st->layer2)) { | |
101 | cskb = skb; | |
102 | skb = NULL; | |
103 | } else { | |
104 | cskb = skb_copy(skb, GFP_KERNEL); | |
105 | } | |
106 | if (cskb) { | |
107 | ret = ch->send(ch, cskb); | |
108 | if (ret) { | |
109 | if (*debug & DEBUG_SEND_ERR) | |
110 | printk(KERN_DEBUG | |
111 | "%s ch%d prim(%x) addr(%x)" | |
112 | " err %d\n", | |
113 | __func__, ch->nr, | |
114 | hh->prim, ch->addr, ret); | |
115 | dev_kfree_skb(cskb); | |
116 | } | |
117 | } else { | |
118 | printk(KERN_WARNING "%s ch%d addr %x no mem\n", | |
119 | __func__, ch->nr, ch->addr); | |
120 | goto out; | |
121 | } | |
122 | } | |
123 | } else { | |
124 | list_for_each_entry(ch, &st->layer2, list) { | |
125 | if ((hh->id & MISDN_ID_ADDR_MASK) == ch->addr) { | |
126 | ret = ch->send(ch, skb); | |
127 | if (!ret) | |
128 | skb = NULL; | |
129 | goto out; | |
130 | } | |
131 | } | |
132 | ret = st->dev->teimgr->ctrl(st->dev->teimgr, CHECK_DATA, skb); | |
133 | if (!ret) | |
134 | skb = NULL; | |
135 | else if (*debug & DEBUG_SEND_ERR) | |
136 | printk(KERN_DEBUG | |
137 | "%s ch%d mgr prim(%x) addr(%x) err %d\n", | |
138 | __func__, ch->nr, hh->prim, ch->addr, ret); | |
139 | } | |
140 | out: | |
141 | mutex_unlock(&st->lmutex); | |
142 | if (skb) | |
143 | dev_kfree_skb(skb); | |
144 | } | |
145 | ||
146 | static inline int | |
147 | send_msg_to_layer(struct mISDNstack *st, struct sk_buff *skb) | |
148 | { | |
149 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
150 | struct mISDNchannel *ch; | |
151 | int lm; | |
152 | ||
153 | lm = hh->prim & MISDN_LAYERMASK; | |
154 | if (*debug & DEBUG_QUEUE_FUNC) | |
155 | printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n", | |
156 | __func__, hh->prim, hh->id, skb); | |
157 | if (lm == 0x1) { | |
158 | if (!hlist_empty(&st->l1sock.head)) { | |
159 | __net_timestamp(skb); | |
160 | send_socklist(&st->l1sock, skb); | |
161 | } | |
162 | return st->layer1->send(st->layer1, skb); | |
163 | } else if (lm == 0x2) { | |
164 | if (!hlist_empty(&st->l1sock.head)) | |
165 | send_socklist(&st->l1sock, skb); | |
166 | send_layer2(st, skb); | |
167 | return 0; | |
168 | } else if (lm == 0x4) { | |
169 | ch = get_channel4id(st, hh->id); | |
170 | if (ch) | |
171 | return ch->send(ch, skb); | |
172 | else | |
173 | printk(KERN_WARNING | |
174 | "%s: dev(%s) prim(%x) id(%x) no channel\n", | |
175 | __func__, st->dev->name, hh->prim, hh->id); | |
176 | } else if (lm == 0x8) { | |
177 | WARN_ON(lm == 0x8); | |
178 | ch = get_channel4id(st, hh->id); | |
179 | if (ch) | |
180 | return ch->send(ch, skb); | |
181 | else | |
182 | printk(KERN_WARNING | |
183 | "%s: dev(%s) prim(%x) id(%x) no channel\n", | |
184 | __func__, st->dev->name, hh->prim, hh->id); | |
185 | } else { | |
186 | /* broadcast not handled yet */ | |
187 | printk(KERN_WARNING "%s: dev(%s) prim %x not delivered\n", | |
188 | __func__, st->dev->name, hh->prim); | |
189 | } | |
190 | return -ESRCH; | |
191 | } | |
192 | ||
193 | static void | |
194 | do_clear_stack(struct mISDNstack *st) | |
195 | { | |
196 | } | |
197 | ||
198 | static int | |
199 | mISDNStackd(void *data) | |
200 | { | |
201 | struct mISDNstack *st = data; | |
202 | int err = 0; | |
203 | ||
204 | #ifdef CONFIG_SMP | |
205 | lock_kernel(); | |
206 | #endif | |
207 | sigfillset(¤t->blocked); | |
208 | #ifdef CONFIG_SMP | |
209 | unlock_kernel(); | |
210 | #endif | |
211 | if (*debug & DEBUG_MSG_THREAD) | |
212 | printk(KERN_DEBUG "mISDNStackd %s started\n", st->dev->name); | |
213 | ||
214 | if (st->notify != NULL) { | |
215 | complete(st->notify); | |
216 | st->notify = NULL; | |
217 | } | |
218 | ||
219 | for (;;) { | |
220 | struct sk_buff *skb; | |
221 | ||
222 | if (unlikely(test_bit(mISDN_STACK_STOPPED, &st->status))) { | |
223 | test_and_clear_bit(mISDN_STACK_WORK, &st->status); | |
224 | test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); | |
225 | } else | |
226 | test_and_set_bit(mISDN_STACK_RUNNING, &st->status); | |
227 | while (test_bit(mISDN_STACK_WORK, &st->status)) { | |
228 | skb = skb_dequeue(&st->msgq); | |
229 | if (!skb) { | |
230 | test_and_clear_bit(mISDN_STACK_WORK, | |
231 | &st->status); | |
232 | /* test if a race happens */ | |
233 | skb = skb_dequeue(&st->msgq); | |
234 | if (!skb) | |
235 | continue; | |
236 | test_and_set_bit(mISDN_STACK_WORK, | |
237 | &st->status); | |
238 | } | |
239 | #ifdef MISDN_MSG_STATS | |
240 | st->msg_cnt++; | |
241 | #endif | |
242 | err = send_msg_to_layer(st, skb); | |
243 | if (unlikely(err)) { | |
244 | if (*debug & DEBUG_SEND_ERR) | |
245 | printk(KERN_DEBUG | |
246 | "%s: %s prim(%x) id(%x) " | |
247 | "send call(%d)\n", | |
248 | __func__, st->dev->name, | |
249 | mISDN_HEAD_PRIM(skb), | |
250 | mISDN_HEAD_ID(skb), err); | |
251 | dev_kfree_skb(skb); | |
252 | continue; | |
253 | } | |
254 | if (unlikely(test_bit(mISDN_STACK_STOPPED, | |
255 | &st->status))) { | |
256 | test_and_clear_bit(mISDN_STACK_WORK, | |
257 | &st->status); | |
258 | test_and_clear_bit(mISDN_STACK_RUNNING, | |
259 | &st->status); | |
260 | break; | |
261 | } | |
262 | } | |
263 | if (test_bit(mISDN_STACK_CLEARING, &st->status)) { | |
264 | test_and_set_bit(mISDN_STACK_STOPPED, &st->status); | |
265 | test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); | |
266 | do_clear_stack(st); | |
267 | test_and_clear_bit(mISDN_STACK_CLEARING, &st->status); | |
268 | test_and_set_bit(mISDN_STACK_RESTART, &st->status); | |
269 | } | |
270 | if (test_and_clear_bit(mISDN_STACK_RESTART, &st->status)) { | |
271 | test_and_clear_bit(mISDN_STACK_STOPPED, &st->status); | |
272 | test_and_set_bit(mISDN_STACK_RUNNING, &st->status); | |
273 | if (!skb_queue_empty(&st->msgq)) | |
274 | test_and_set_bit(mISDN_STACK_WORK, | |
275 | &st->status); | |
276 | } | |
277 | if (test_bit(mISDN_STACK_ABORT, &st->status)) | |
278 | break; | |
279 | if (st->notify != NULL) { | |
280 | complete(st->notify); | |
281 | st->notify = NULL; | |
282 | } | |
283 | #ifdef MISDN_MSG_STATS | |
284 | st->sleep_cnt++; | |
285 | #endif | |
286 | test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status); | |
287 | wait_event_interruptible(st->workq, (st->status & | |
288 | mISDN_STACK_ACTION_MASK)); | |
289 | if (*debug & DEBUG_MSG_THREAD) | |
290 | printk(KERN_DEBUG "%s: %s wake status %08lx\n", | |
291 | __func__, st->dev->name, st->status); | |
292 | test_and_set_bit(mISDN_STACK_ACTIVE, &st->status); | |
293 | ||
294 | test_and_clear_bit(mISDN_STACK_WAKEUP, &st->status); | |
295 | ||
296 | if (test_bit(mISDN_STACK_STOPPED, &st->status)) { | |
297 | test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); | |
298 | #ifdef MISDN_MSG_STATS | |
299 | st->stopped_cnt++; | |
300 | #endif | |
301 | } | |
302 | } | |
303 | #ifdef MISDN_MSG_STATS | |
304 | printk(KERN_DEBUG "mISDNStackd daemon for %s proceed %d " | |
305 | "msg %d sleep %d stopped\n", | |
306 | st->dev->name, st->msg_cnt, st->sleep_cnt, st->stopped_cnt); | |
307 | printk(KERN_DEBUG | |
308 | "mISDNStackd daemon for %s utime(%ld) stime(%ld)\n", | |
309 | st->dev->name, st->thread->utime, st->thread->stime); | |
310 | printk(KERN_DEBUG | |
311 | "mISDNStackd daemon for %s nvcsw(%ld) nivcsw(%ld)\n", | |
312 | st->dev->name, st->thread->nvcsw, st->thread->nivcsw); | |
313 | printk(KERN_DEBUG "mISDNStackd daemon for %s killed now\n", | |
314 | st->dev->name); | |
315 | #endif | |
316 | test_and_set_bit(mISDN_STACK_KILLED, &st->status); | |
317 | test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); | |
318 | test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status); | |
319 | test_and_clear_bit(mISDN_STACK_ABORT, &st->status); | |
320 | skb_queue_purge(&st->msgq); | |
321 | st->thread = NULL; | |
322 | if (st->notify != NULL) { | |
323 | complete(st->notify); | |
324 | st->notify = NULL; | |
325 | } | |
326 | return 0; | |
327 | } | |
328 | ||
329 | static int | |
330 | l1_receive(struct mISDNchannel *ch, struct sk_buff *skb) | |
331 | { | |
332 | if (!ch->st) | |
333 | return -ENODEV; | |
334 | __net_timestamp(skb); | |
335 | _queue_message(ch->st, skb); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | void | |
340 | set_channel_address(struct mISDNchannel *ch, u_int sapi, u_int tei) | |
341 | { | |
342 | ch->addr = sapi | (tei << 8); | |
343 | } | |
344 | ||
345 | void | |
346 | __add_layer2(struct mISDNchannel *ch, struct mISDNstack *st) | |
347 | { | |
348 | list_add_tail(&ch->list, &st->layer2); | |
349 | } | |
350 | ||
351 | void | |
352 | add_layer2(struct mISDNchannel *ch, struct mISDNstack *st) | |
353 | { | |
354 | mutex_lock(&st->lmutex); | |
355 | __add_layer2(ch, st); | |
356 | mutex_unlock(&st->lmutex); | |
357 | } | |
358 | ||
359 | static int | |
360 | st_own_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
361 | { | |
362 | if (!ch->st || ch->st->layer1) | |
363 | return -EINVAL; | |
364 | return ch->st->layer1->ctrl(ch->st->layer1, cmd, arg); | |
365 | } | |
366 | ||
367 | int | |
368 | create_stack(struct mISDNdevice *dev) | |
369 | { | |
370 | struct mISDNstack *newst; | |
371 | int err; | |
372 | DECLARE_COMPLETION_ONSTACK(done); | |
373 | ||
374 | newst = kzalloc(sizeof(struct mISDNstack), GFP_KERNEL); | |
375 | if (!newst) { | |
376 | printk(KERN_ERR "kmalloc mISDN_stack failed\n"); | |
377 | return -ENOMEM; | |
378 | } | |
379 | newst->dev = dev; | |
380 | INIT_LIST_HEAD(&newst->layer2); | |
381 | INIT_HLIST_HEAD(&newst->l1sock.head); | |
382 | rwlock_init(&newst->l1sock.lock); | |
383 | init_waitqueue_head(&newst->workq); | |
384 | skb_queue_head_init(&newst->msgq); | |
385 | mutex_init(&newst->lmutex); | |
386 | dev->D.st = newst; | |
387 | err = create_teimanager(dev); | |
388 | if (err) { | |
389 | printk(KERN_ERR "kmalloc teimanager failed\n"); | |
390 | kfree(newst); | |
391 | return err; | |
392 | } | |
393 | dev->teimgr->peer = &newst->own; | |
394 | dev->teimgr->recv = mISDN_queue_message; | |
395 | dev->teimgr->st = newst; | |
396 | newst->layer1 = &dev->D; | |
397 | dev->D.recv = l1_receive; | |
398 | dev->D.peer = &newst->own; | |
399 | newst->own.st = newst; | |
400 | newst->own.ctrl = st_own_ctrl; | |
401 | newst->own.send = mISDN_queue_message; | |
402 | newst->own.recv = mISDN_queue_message; | |
403 | if (*debug & DEBUG_CORE_FUNC) | |
404 | printk(KERN_DEBUG "%s: st(%s)\n", __func__, newst->dev->name); | |
405 | newst->notify = &done; | |
406 | newst->thread = kthread_run(mISDNStackd, (void *)newst, "mISDN_%s", | |
407 | newst->dev->name); | |
408 | if (IS_ERR(newst->thread)) { | |
409 | err = PTR_ERR(newst->thread); | |
410 | printk(KERN_ERR | |
411 | "mISDN:cannot create kernel thread for %s (%d)\n", | |
412 | newst->dev->name, err); | |
413 | delete_teimanager(dev->teimgr); | |
414 | kfree(newst); | |
415 | } else | |
416 | wait_for_completion(&done); | |
417 | return err; | |
418 | } | |
419 | ||
420 | int | |
421 | connect_layer1(struct mISDNdevice *dev, struct mISDNchannel *ch, | |
422 | u_int protocol, struct sockaddr_mISDN *adr) | |
423 | { | |
424 | struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch); | |
425 | struct channel_req rq; | |
426 | int err; | |
427 | ||
428 | ||
429 | if (*debug & DEBUG_CORE_FUNC) | |
430 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n", | |
431 | __func__, dev->name, protocol, adr->dev, adr->channel, | |
432 | adr->sapi, adr->tei); | |
433 | switch (protocol) { | |
434 | case ISDN_P_NT_S0: | |
435 | case ISDN_P_NT_E1: | |
436 | case ISDN_P_TE_S0: | |
437 | case ISDN_P_TE_E1: | |
438 | #ifdef PROTOCOL_CHECK | |
439 | /* this should be enhanced */ | |
440 | if (!list_empty(&dev->D.st->layer2) | |
441 | && dev->D.protocol != protocol) | |
442 | return -EBUSY; | |
443 | if (!hlist_empty(&dev->D.st->l1sock.head) | |
444 | && dev->D.protocol != protocol) | |
445 | return -EBUSY; | |
446 | #endif | |
447 | ch->recv = mISDN_queue_message; | |
448 | ch->peer = &dev->D.st->own; | |
449 | ch->st = dev->D.st; | |
450 | rq.protocol = protocol; | |
451 | rq.adr.channel = 0; | |
452 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); | |
453 | printk(KERN_DEBUG "%s: ret 1 %d\n", __func__, err); | |
454 | if (err) | |
455 | return err; | |
456 | write_lock_bh(&dev->D.st->l1sock.lock); | |
457 | sk_add_node(&msk->sk, &dev->D.st->l1sock.head); | |
458 | write_unlock_bh(&dev->D.st->l1sock.lock); | |
459 | break; | |
460 | default: | |
461 | return -ENOPROTOOPT; | |
462 | } | |
463 | return 0; | |
464 | } | |
465 | ||
466 | int | |
467 | connect_Bstack(struct mISDNdevice *dev, struct mISDNchannel *ch, | |
468 | u_int protocol, struct sockaddr_mISDN *adr) | |
469 | { | |
470 | struct channel_req rq, rq2; | |
471 | int pmask, err; | |
472 | struct Bprotocol *bp; | |
473 | ||
474 | if (*debug & DEBUG_CORE_FUNC) | |
475 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n", | |
476 | __func__, dev->name, protocol, | |
477 | adr->dev, adr->channel, adr->sapi, | |
478 | adr->tei); | |
479 | ch->st = dev->D.st; | |
480 | pmask = 1 << (protocol & ISDN_P_B_MASK); | |
481 | if (pmask & dev->Bprotocols) { | |
482 | rq.protocol = protocol; | |
483 | rq.adr = *adr; | |
484 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); | |
485 | if (err) | |
486 | return err; | |
487 | ch->recv = rq.ch->send; | |
488 | ch->peer = rq.ch; | |
489 | rq.ch->recv = ch->send; | |
490 | rq.ch->peer = ch; | |
491 | rq.ch->st = dev->D.st; | |
492 | } else { | |
493 | bp = get_Bprotocol4mask(pmask); | |
494 | if (!bp) | |
495 | return -ENOPROTOOPT; | |
496 | rq2.protocol = protocol; | |
497 | rq2.adr = *adr; | |
498 | rq2.ch = ch; | |
499 | err = bp->create(&rq2); | |
500 | if (err) | |
501 | return err; | |
502 | ch->recv = rq2.ch->send; | |
503 | ch->peer = rq2.ch; | |
504 | rq2.ch->st = dev->D.st; | |
505 | rq.protocol = rq2.protocol; | |
506 | rq.adr = *adr; | |
507 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); | |
508 | if (err) { | |
509 | rq2.ch->ctrl(rq2.ch, CLOSE_CHANNEL, NULL); | |
510 | return err; | |
511 | } | |
512 | rq2.ch->recv = rq.ch->send; | |
513 | rq2.ch->peer = rq.ch; | |
514 | rq.ch->recv = rq2.ch->send; | |
515 | rq.ch->peer = rq2.ch; | |
516 | rq.ch->st = dev->D.st; | |
517 | } | |
518 | ch->protocol = protocol; | |
519 | ch->nr = rq.ch->nr; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | int | |
524 | create_l2entity(struct mISDNdevice *dev, struct mISDNchannel *ch, | |
525 | u_int protocol, struct sockaddr_mISDN *adr) | |
526 | { | |
527 | struct channel_req rq; | |
528 | int err; | |
529 | ||
530 | if (*debug & DEBUG_CORE_FUNC) | |
531 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n", | |
532 | __func__, dev->name, protocol, | |
533 | adr->dev, adr->channel, adr->sapi, | |
534 | adr->tei); | |
535 | rq.protocol = ISDN_P_TE_S0; | |
536 | if (dev->Dprotocols & (1 << ISDN_P_TE_E1)) | |
537 | rq.protocol = ISDN_P_TE_E1; | |
538 | switch (protocol) { | |
539 | case ISDN_P_LAPD_NT: | |
540 | rq.protocol = ISDN_P_NT_S0; | |
541 | if (dev->Dprotocols & (1 << ISDN_P_NT_E1)) | |
542 | rq.protocol = ISDN_P_NT_E1; | |
543 | case ISDN_P_LAPD_TE: | |
544 | #ifdef PROTOCOL_CHECK | |
545 | /* this should be enhanced */ | |
546 | if (!list_empty(&dev->D.st->layer2) | |
547 | && dev->D.protocol != protocol) | |
548 | return -EBUSY; | |
549 | if (!hlist_empty(&dev->D.st->l1sock.head) | |
550 | && dev->D.protocol != protocol) | |
551 | return -EBUSY; | |
552 | #endif | |
553 | ch->recv = mISDN_queue_message; | |
554 | ch->peer = &dev->D.st->own; | |
555 | ch->st = dev->D.st; | |
556 | rq.adr.channel = 0; | |
557 | err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); | |
558 | printk(KERN_DEBUG "%s: ret 1 %d\n", __func__, err); | |
559 | if (err) | |
560 | break; | |
561 | rq.protocol = protocol; | |
562 | rq.adr = *adr; | |
563 | rq.ch = ch; | |
564 | err = dev->teimgr->ctrl(dev->teimgr, OPEN_CHANNEL, &rq); | |
565 | printk(KERN_DEBUG "%s: ret 2 %d\n", __func__, err); | |
566 | if (!err) { | |
567 | if ((protocol == ISDN_P_LAPD_NT) && !rq.ch) | |
568 | break; | |
569 | add_layer2(rq.ch, dev->D.st); | |
570 | rq.ch->recv = mISDN_queue_message; | |
571 | rq.ch->peer = &dev->D.st->own; | |
572 | rq.ch->ctrl(rq.ch, OPEN_CHANNEL, NULL); /* can't fail */ | |
573 | } | |
574 | break; | |
575 | default: | |
576 | err = -EPROTONOSUPPORT; | |
577 | } | |
578 | return err; | |
579 | } | |
580 | ||
581 | void | |
582 | delete_channel(struct mISDNchannel *ch) | |
583 | { | |
584 | struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch); | |
585 | struct mISDNchannel *pch; | |
586 | ||
587 | if (!ch->st) { | |
588 | printk(KERN_WARNING "%s: no stack\n", __func__); | |
589 | return; | |
590 | } | |
591 | if (*debug & DEBUG_CORE_FUNC) | |
592 | printk(KERN_DEBUG "%s: st(%s) protocol(%x)\n", __func__, | |
593 | ch->st->dev->name, ch->protocol); | |
594 | if (ch->protocol >= ISDN_P_B_START) { | |
595 | if (ch->peer) { | |
596 | ch->peer->ctrl(ch->peer, CLOSE_CHANNEL, NULL); | |
597 | ch->peer = NULL; | |
598 | } | |
599 | return; | |
600 | } | |
601 | switch (ch->protocol) { | |
602 | case ISDN_P_NT_S0: | |
603 | case ISDN_P_TE_S0: | |
604 | case ISDN_P_NT_E1: | |
605 | case ISDN_P_TE_E1: | |
606 | write_lock_bh(&ch->st->l1sock.lock); | |
607 | sk_del_node_init(&msk->sk); | |
608 | write_unlock_bh(&ch->st->l1sock.lock); | |
609 | ch->st->dev->D.ctrl(&ch->st->dev->D, CLOSE_CHANNEL, NULL); | |
610 | break; | |
611 | case ISDN_P_LAPD_TE: | |
612 | pch = get_channel4id(ch->st, ch->nr); | |
613 | if (pch) { | |
614 | mutex_lock(&ch->st->lmutex); | |
615 | list_del(&pch->list); | |
616 | mutex_unlock(&ch->st->lmutex); | |
617 | pch->ctrl(pch, CLOSE_CHANNEL, NULL); | |
618 | pch = ch->st->dev->teimgr; | |
619 | pch->ctrl(pch, CLOSE_CHANNEL, NULL); | |
620 | } else | |
621 | printk(KERN_WARNING "%s: no l2 channel\n", | |
622 | __func__); | |
623 | break; | |
624 | case ISDN_P_LAPD_NT: | |
625 | pch = ch->st->dev->teimgr; | |
626 | if (pch) { | |
627 | pch->ctrl(pch, CLOSE_CHANNEL, NULL); | |
628 | } else | |
629 | printk(KERN_WARNING "%s: no l2 channel\n", | |
630 | __func__); | |
631 | break; | |
632 | default: | |
633 | break; | |
634 | } | |
635 | return; | |
636 | } | |
637 | ||
638 | void | |
639 | delete_stack(struct mISDNdevice *dev) | |
640 | { | |
641 | struct mISDNstack *st = dev->D.st; | |
642 | DECLARE_COMPLETION_ONSTACK(done); | |
643 | ||
644 | if (*debug & DEBUG_CORE_FUNC) | |
645 | printk(KERN_DEBUG "%s: st(%s)\n", __func__, | |
646 | st->dev->name); | |
647 | if (dev->teimgr) | |
648 | delete_teimanager(dev->teimgr); | |
649 | if (st->thread) { | |
650 | if (st->notify) { | |
651 | printk(KERN_WARNING "%s: notifier in use\n", | |
652 | __func__); | |
653 | complete(st->notify); | |
654 | } | |
655 | st->notify = &done; | |
656 | test_and_set_bit(mISDN_STACK_ABORT, &st->status); | |
657 | test_and_set_bit(mISDN_STACK_WAKEUP, &st->status); | |
658 | wake_up_interruptible(&st->workq); | |
659 | wait_for_completion(&done); | |
660 | } | |
661 | if (!list_empty(&st->layer2)) | |
662 | printk(KERN_WARNING "%s: layer2 list not empty\n", | |
663 | __func__); | |
664 | if (!hlist_empty(&st->l1sock.head)) | |
665 | printk(KERN_WARNING "%s: layer1 list not empty\n", | |
666 | __func__); | |
667 | kfree(st); | |
668 | } | |
669 | ||
670 | void | |
671 | mISDN_initstack(u_int *dp) | |
672 | { | |
673 | debug = dp; | |
674 | } |