3 * Author Karsten Keil <kkeil@novell.com>
5 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
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.
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.
18 #include <linux/mISDNif.h>
19 #include <linux/kthread.h>
20 #include <linux/smp_lock.h>
26 _queue_message(struct mISDNstack *st, struct sk_buff *skb)
28 struct mISDNhead *hh = mISDN_HEAD_P(skb);
30 if (*debug & DEBUG_QUEUE_FUNC)
31 printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n",
32 __func__, hh->prim, hh->id, skb);
33 skb_queue_tail(&st->msgq, skb);
34 if (likely(!test_bit(mISDN_STACK_STOPPED, &st->status))) {
35 test_and_set_bit(mISDN_STACK_WORK, &st->status);
36 wake_up_interruptible(&st->workq);
41 mISDN_queue_message(struct mISDNchannel *ch, struct sk_buff *skb)
43 _queue_message(ch->st, skb);
47 static struct mISDNchannel *
48 get_channel4id(struct mISDNstack *st, u_int id)
50 struct mISDNchannel *ch;
52 mutex_lock(&st->lmutex);
53 list_for_each_entry(ch, &st->layer2, list) {
59 mutex_unlock(&st->lmutex);
64 send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb)
66 struct hlist_node *node;
68 struct sk_buff *cskb = NULL;
71 sk_for_each(sk, node, &sl->head) {
72 if (sk->sk_state != MISDN_BOUND)
75 cskb = skb_copy(skb, GFP_KERNEL);
77 printk(KERN_WARNING "%s no skb\n", __func__);
80 if (!sock_queue_rcv_skb(sk, cskb))
83 read_unlock(&sl->lock);
89 send_layer2(struct mISDNstack *st, struct sk_buff *skb)
92 struct mISDNhead *hh = mISDN_HEAD_P(skb);
93 struct mISDNchannel *ch;
98 mutex_lock(&st->lmutex);
99 if ((hh->id & MISDN_ID_ADDR_MASK) == MISDN_ID_ANY) { /* L2 for all */
100 list_for_each_entry(ch, &st->layer2, list) {
101 if (list_is_last(&ch->list, &st->layer2)) {
105 cskb = skb_copy(skb, GFP_KERNEL);
108 ret = ch->send(ch, cskb);
110 if (*debug & DEBUG_SEND_ERR)
112 "%s ch%d prim(%x) addr(%x)"
115 hh->prim, ch->addr, ret);
119 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
120 __func__, ch->nr, ch->addr);
125 list_for_each_entry(ch, &st->layer2, list) {
126 if ((hh->id & MISDN_ID_ADDR_MASK) == ch->addr) {
127 ret = ch->send(ch, skb);
133 ret = st->dev->teimgr->ctrl(st->dev->teimgr, CHECK_DATA, skb);
136 else if (*debug & DEBUG_SEND_ERR)
138 "%s ch%d mgr prim(%x) addr(%x) err %d\n",
139 __func__, ch->nr, hh->prim, ch->addr, ret);
142 mutex_unlock(&st->lmutex);
148 send_msg_to_layer(struct mISDNstack *st, struct sk_buff *skb)
150 struct mISDNhead *hh = mISDN_HEAD_P(skb);
151 struct mISDNchannel *ch;
154 lm = hh->prim & MISDN_LAYERMASK;
155 if (*debug & DEBUG_QUEUE_FUNC)
156 printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n",
157 __func__, hh->prim, hh->id, skb);
159 if (!hlist_empty(&st->l1sock.head)) {
160 __net_timestamp(skb);
161 send_socklist(&st->l1sock, skb);
163 return st->layer1->send(st->layer1, skb);
164 } else if (lm == 0x2) {
165 if (!hlist_empty(&st->l1sock.head))
166 send_socklist(&st->l1sock, skb);
167 send_layer2(st, skb);
169 } else if (lm == 0x4) {
170 ch = get_channel4id(st, hh->id);
172 return ch->send(ch, skb);
175 "%s: dev(%s) prim(%x) id(%x) no channel\n",
176 __func__, dev_name(&st->dev->dev), hh->prim,
178 } else if (lm == 0x8) {
180 ch = get_channel4id(st, hh->id);
182 return ch->send(ch, skb);
185 "%s: dev(%s) prim(%x) id(%x) no channel\n",
186 __func__, dev_name(&st->dev->dev), hh->prim,
189 /* broadcast not handled yet */
190 printk(KERN_WARNING "%s: dev(%s) prim %x not delivered\n",
191 __func__, dev_name(&st->dev->dev), hh->prim);
197 do_clear_stack(struct mISDNstack *st)
202 mISDNStackd(void *data)
204 struct mISDNstack *st = data;
210 sigfillset(¤t->blocked);
214 if (*debug & DEBUG_MSG_THREAD)
215 printk(KERN_DEBUG "mISDNStackd %s started\n",
216 dev_name(&st->dev->dev));
218 if (st->notify != NULL) {
219 complete(st->notify);
226 if (unlikely(test_bit(mISDN_STACK_STOPPED, &st->status))) {
227 test_and_clear_bit(mISDN_STACK_WORK, &st->status);
228 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
230 test_and_set_bit(mISDN_STACK_RUNNING, &st->status);
231 while (test_bit(mISDN_STACK_WORK, &st->status)) {
232 skb = skb_dequeue(&st->msgq);
234 test_and_clear_bit(mISDN_STACK_WORK,
236 /* test if a race happens */
237 skb = skb_dequeue(&st->msgq);
240 test_and_set_bit(mISDN_STACK_WORK,
243 #ifdef MISDN_MSG_STATS
246 err = send_msg_to_layer(st, skb);
248 if (*debug & DEBUG_SEND_ERR)
250 "%s: %s prim(%x) id(%x) "
252 __func__, dev_name(&st->dev->dev),
253 mISDN_HEAD_PRIM(skb),
254 mISDN_HEAD_ID(skb), err);
258 if (unlikely(test_bit(mISDN_STACK_STOPPED,
260 test_and_clear_bit(mISDN_STACK_WORK,
262 test_and_clear_bit(mISDN_STACK_RUNNING,
267 if (test_bit(mISDN_STACK_CLEARING, &st->status)) {
268 test_and_set_bit(mISDN_STACK_STOPPED, &st->status);
269 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
271 test_and_clear_bit(mISDN_STACK_CLEARING, &st->status);
272 test_and_set_bit(mISDN_STACK_RESTART, &st->status);
274 if (test_and_clear_bit(mISDN_STACK_RESTART, &st->status)) {
275 test_and_clear_bit(mISDN_STACK_STOPPED, &st->status);
276 test_and_set_bit(mISDN_STACK_RUNNING, &st->status);
277 if (!skb_queue_empty(&st->msgq))
278 test_and_set_bit(mISDN_STACK_WORK,
281 if (test_bit(mISDN_STACK_ABORT, &st->status))
283 if (st->notify != NULL) {
284 complete(st->notify);
287 #ifdef MISDN_MSG_STATS
290 test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status);
291 wait_event_interruptible(st->workq, (st->status &
292 mISDN_STACK_ACTION_MASK));
293 if (*debug & DEBUG_MSG_THREAD)
294 printk(KERN_DEBUG "%s: %s wake status %08lx\n",
295 __func__, dev_name(&st->dev->dev), st->status);
296 test_and_set_bit(mISDN_STACK_ACTIVE, &st->status);
298 test_and_clear_bit(mISDN_STACK_WAKEUP, &st->status);
300 if (test_bit(mISDN_STACK_STOPPED, &st->status)) {
301 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
302 #ifdef MISDN_MSG_STATS
307 #ifdef MISDN_MSG_STATS
308 printk(KERN_DEBUG "mISDNStackd daemon for %s proceed %d "
309 "msg %d sleep %d stopped\n",
310 dev_name(&st->dev->dev), st->msg_cnt, st->sleep_cnt,
313 "mISDNStackd daemon for %s utime(%ld) stime(%ld)\n",
314 dev_name(&st->dev->dev), st->thread->utime, st->thread->stime);
316 "mISDNStackd daemon for %s nvcsw(%ld) nivcsw(%ld)\n",
317 dev_name(&st->dev->dev), st->thread->nvcsw, st->thread->nivcsw);
318 printk(KERN_DEBUG "mISDNStackd daemon for %s killed now\n",
319 dev_name(&st->dev->dev));
321 test_and_set_bit(mISDN_STACK_KILLED, &st->status);
322 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
323 test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status);
324 test_and_clear_bit(mISDN_STACK_ABORT, &st->status);
325 skb_queue_purge(&st->msgq);
327 if (st->notify != NULL) {
328 complete(st->notify);
335 l1_receive(struct mISDNchannel *ch, struct sk_buff *skb)
339 __net_timestamp(skb);
340 _queue_message(ch->st, skb);
345 set_channel_address(struct mISDNchannel *ch, u_int sapi, u_int tei)
347 ch->addr = sapi | (tei << 8);
351 __add_layer2(struct mISDNchannel *ch, struct mISDNstack *st)
353 list_add_tail(&ch->list, &st->layer2);
357 add_layer2(struct mISDNchannel *ch, struct mISDNstack *st)
359 mutex_lock(&st->lmutex);
360 __add_layer2(ch, st);
361 mutex_unlock(&st->lmutex);
365 st_own_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
367 if (!ch->st || ch->st->layer1)
369 return ch->st->layer1->ctrl(ch->st->layer1, cmd, arg);
373 create_stack(struct mISDNdevice *dev)
375 struct mISDNstack *newst;
377 DECLARE_COMPLETION_ONSTACK(done);
379 newst = kzalloc(sizeof(struct mISDNstack), GFP_KERNEL);
381 printk(KERN_ERR "kmalloc mISDN_stack failed\n");
385 INIT_LIST_HEAD(&newst->layer2);
386 INIT_HLIST_HEAD(&newst->l1sock.head);
387 rwlock_init(&newst->l1sock.lock);
388 init_waitqueue_head(&newst->workq);
389 skb_queue_head_init(&newst->msgq);
390 mutex_init(&newst->lmutex);
392 err = create_teimanager(dev);
394 printk(KERN_ERR "kmalloc teimanager failed\n");
398 dev->teimgr->peer = &newst->own;
399 dev->teimgr->recv = mISDN_queue_message;
400 dev->teimgr->st = newst;
401 newst->layer1 = &dev->D;
402 dev->D.recv = l1_receive;
403 dev->D.peer = &newst->own;
404 newst->own.st = newst;
405 newst->own.ctrl = st_own_ctrl;
406 newst->own.send = mISDN_queue_message;
407 newst->own.recv = mISDN_queue_message;
408 if (*debug & DEBUG_CORE_FUNC)
409 printk(KERN_DEBUG "%s: st(%s)\n", __func__,
410 dev_name(&newst->dev->dev));
411 newst->notify = &done;
412 newst->thread = kthread_run(mISDNStackd, (void *)newst, "mISDN_%s",
413 dev_name(&newst->dev->dev));
414 if (IS_ERR(newst->thread)) {
415 err = PTR_ERR(newst->thread);
417 "mISDN:cannot create kernel thread for %s (%d)\n",
418 dev_name(&newst->dev->dev), err);
419 delete_teimanager(dev->teimgr);
422 wait_for_completion(&done);
427 connect_layer1(struct mISDNdevice *dev, struct mISDNchannel *ch,
428 u_int protocol, struct sockaddr_mISDN *adr)
430 struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch);
431 struct channel_req rq;
435 if (*debug & DEBUG_CORE_FUNC)
436 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
437 __func__, dev_name(&dev->dev), protocol, adr->dev,
438 adr->channel, adr->sapi, adr->tei);
444 ch->recv = mISDN_queue_message;
445 ch->peer = &dev->D.st->own;
447 rq.protocol = protocol;
448 rq.adr.channel = adr->channel;
449 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
450 printk(KERN_DEBUG "%s: ret %d (dev %d)\n", __func__, err,
454 write_lock_bh(&dev->D.st->l1sock.lock);
455 sk_add_node(&msk->sk, &dev->D.st->l1sock.head);
456 write_unlock_bh(&dev->D.st->l1sock.lock);
465 connect_Bstack(struct mISDNdevice *dev, struct mISDNchannel *ch,
466 u_int protocol, struct sockaddr_mISDN *adr)
468 struct channel_req rq, rq2;
470 struct Bprotocol *bp;
472 if (*debug & DEBUG_CORE_FUNC)
473 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
474 __func__, dev_name(&dev->dev), protocol,
475 adr->dev, adr->channel, adr->sapi,
478 pmask = 1 << (protocol & ISDN_P_B_MASK);
479 if (pmask & dev->Bprotocols) {
480 rq.protocol = protocol;
482 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
485 ch->recv = rq.ch->send;
487 rq.ch->recv = ch->send;
489 rq.ch->st = dev->D.st;
491 bp = get_Bprotocol4mask(pmask);
494 rq2.protocol = protocol;
497 err = bp->create(&rq2);
500 ch->recv = rq2.ch->send;
502 rq2.ch->st = dev->D.st;
503 rq.protocol = rq2.protocol;
505 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
507 rq2.ch->ctrl(rq2.ch, CLOSE_CHANNEL, NULL);
510 rq2.ch->recv = rq.ch->send;
511 rq2.ch->peer = rq.ch;
512 rq.ch->recv = rq2.ch->send;
513 rq.ch->peer = rq2.ch;
514 rq.ch->st = dev->D.st;
516 ch->protocol = protocol;
522 create_l2entity(struct mISDNdevice *dev, struct mISDNchannel *ch,
523 u_int protocol, struct sockaddr_mISDN *adr)
525 struct channel_req rq;
528 if (*debug & DEBUG_CORE_FUNC)
529 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
530 __func__, dev_name(&dev->dev), protocol,
531 adr->dev, adr->channel, adr->sapi,
533 rq.protocol = ISDN_P_TE_S0;
534 if (dev->Dprotocols & (1 << ISDN_P_TE_E1))
535 rq.protocol = ISDN_P_TE_E1;
538 rq.protocol = ISDN_P_NT_S0;
539 if (dev->Dprotocols & (1 << ISDN_P_NT_E1))
540 rq.protocol = ISDN_P_NT_E1;
542 ch->recv = mISDN_queue_message;
543 ch->peer = &dev->D.st->own;
546 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
547 printk(KERN_DEBUG "%s: ret 1 %d\n", __func__, err);
550 rq.protocol = protocol;
553 err = dev->teimgr->ctrl(dev->teimgr, OPEN_CHANNEL, &rq);
554 printk(KERN_DEBUG "%s: ret 2 %d\n", __func__, err);
556 if ((protocol == ISDN_P_LAPD_NT) && !rq.ch)
558 add_layer2(rq.ch, dev->D.st);
559 rq.ch->recv = mISDN_queue_message;
560 rq.ch->peer = &dev->D.st->own;
561 rq.ch->ctrl(rq.ch, OPEN_CHANNEL, NULL); /* can't fail */
565 err = -EPROTONOSUPPORT;
571 delete_channel(struct mISDNchannel *ch)
573 struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch);
574 struct mISDNchannel *pch;
577 printk(KERN_WARNING "%s: no stack\n", __func__);
580 if (*debug & DEBUG_CORE_FUNC)
581 printk(KERN_DEBUG "%s: st(%s) protocol(%x)\n", __func__,
582 dev_name(&ch->st->dev->dev), ch->protocol);
583 if (ch->protocol >= ISDN_P_B_START) {
585 ch->peer->ctrl(ch->peer, CLOSE_CHANNEL, NULL);
590 switch (ch->protocol) {
595 write_lock_bh(&ch->st->l1sock.lock);
596 sk_del_node_init(&msk->sk);
597 write_unlock_bh(&ch->st->l1sock.lock);
598 ch->st->dev->D.ctrl(&ch->st->dev->D, CLOSE_CHANNEL, NULL);
601 pch = get_channel4id(ch->st, ch->nr);
603 mutex_lock(&ch->st->lmutex);
604 list_del(&pch->list);
605 mutex_unlock(&ch->st->lmutex);
606 pch->ctrl(pch, CLOSE_CHANNEL, NULL);
607 pch = ch->st->dev->teimgr;
608 pch->ctrl(pch, CLOSE_CHANNEL, NULL);
610 printk(KERN_WARNING "%s: no l2 channel\n",
614 pch = ch->st->dev->teimgr;
616 pch->ctrl(pch, CLOSE_CHANNEL, NULL);
618 printk(KERN_WARNING "%s: no l2 channel\n",
628 delete_stack(struct mISDNdevice *dev)
630 struct mISDNstack *st = dev->D.st;
631 DECLARE_COMPLETION_ONSTACK(done);
633 if (*debug & DEBUG_CORE_FUNC)
634 printk(KERN_DEBUG "%s: st(%s)\n", __func__,
635 dev_name(&st->dev->dev));
637 delete_teimanager(dev->teimgr);
640 printk(KERN_WARNING "%s: notifier in use\n",
642 complete(st->notify);
645 test_and_set_bit(mISDN_STACK_ABORT, &st->status);
646 test_and_set_bit(mISDN_STACK_WAKEUP, &st->status);
647 wake_up_interruptible(&st->workq);
648 wait_for_completion(&done);
650 if (!list_empty(&st->layer2))
651 printk(KERN_WARNING "%s: layer2 list not empty\n",
653 if (!hlist_empty(&st->l1sock.head))
654 printk(KERN_WARNING "%s: layer1 list not empty\n",
660 mISDN_initstack(u_int *dp)