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initial commit with v2.6.9
[linux-2.6.9-moxart.git] / net / atm / common.c
blob19d31f1b2c23d4a9a5d0ebaaa5f5fea8718e5246
1 /* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
2
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6 #include <linux/config.h>
7 #include <linux/module.h>
8 #include <linux/kmod.h>
9 #include <linux/net.h> /* struct socket, struct proto_ops */
10 #include <linux/atm.h> /* ATM stuff */
11 #include <linux/atmdev.h>
12 #include <linux/socket.h> /* SOL_SOCKET */
13 #include <linux/errno.h> /* error codes */
14 #include <linux/capability.h>
15 #include <linux/mm.h> /* verify_area */
16 #include <linux/sched.h>
17 #include <linux/time.h> /* struct timeval */
18 #include <linux/skbuff.h>
19 #include <linux/bitops.h>
20 #include <linux/init.h>
21 #include <net/sock.h> /* struct sock */
22
23 #include <asm/uaccess.h>
24 #include <asm/atomic.h>
25 #include <asm/poll.h>
26
27
28 #include "resources.h" /* atm_find_dev */
29 #include "common.h" /* prototypes */
30 #include "protocols.h" /* atm_init_<transport> */
31 #include "addr.h" /* address registry */
32 #include "signaling.h" /* for WAITING and sigd_attach */
33
34
35 #if 0
36 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
37 #else
38 #define DPRINTK(format,args...)
39 #endif
40
41 struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
42 rwlock_t vcc_sklist_lock = RW_LOCK_UNLOCKED;
43
44 void __vcc_insert_socket(struct sock *sk)
45 {
46 struct atm_vcc *vcc = atm_sk(sk);
47 struct hlist_head *head = &vcc_hash[vcc->vci &
48 (VCC_HTABLE_SIZE - 1)];
49 sk->sk_hashent = vcc->vci & (VCC_HTABLE_SIZE - 1);
50 sk_add_node(sk, head);
51 }
52
53 void vcc_insert_socket(struct sock *sk)
54 {
55 write_lock_irq(&vcc_sklist_lock);
56 __vcc_insert_socket(sk);
57 write_unlock_irq(&vcc_sklist_lock);
58 }
59
60 void vcc_remove_socket(struct sock *sk)
61 {
62 write_lock_irq(&vcc_sklist_lock);
63 sk_del_node_init(sk);
64 write_unlock_irq(&vcc_sklist_lock);
65 }
66
67
68 static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
69 {
70 struct sk_buff *skb;
71
72 if (atomic_read(&vcc->sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) {
73 DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
74 atomic_read(&vcc->sk->sk_wmem_alloc), size,
75 vcc->sk->sk_sndbuf);
76 return NULL;
77 }
78 while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule();
79 DPRINTK("AlTx %d += %d\n", atomic_read(&vcc->sk->sk_wmem_alloc),
80 skb->truesize);
81 atomic_add(skb->truesize, &vcc->sk->sk_wmem_alloc);
82 return skb;
83 }
84
85
86 EXPORT_SYMBOL(vcc_hash);
87 EXPORT_SYMBOL(vcc_sklist_lock);
88 EXPORT_SYMBOL(vcc_insert_socket);
89 EXPORT_SYMBOL(vcc_remove_socket);
90
91 static void vcc_sock_destruct(struct sock *sk)
92 {
93 struct atm_vcc *vcc = atm_sk(sk);
94
95 if (atomic_read(&vcc->sk->sk_rmem_alloc))
96 printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc));
97
98 if (atomic_read(&vcc->sk->sk_wmem_alloc))
99 printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc));
100
101 kfree(sk->sk_protinfo);
102 }
103
104 static void vcc_def_wakeup(struct sock *sk)
105 {
106 read_lock(&sk->sk_callback_lock);
107 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
108 wake_up(sk->sk_sleep);
109 read_unlock(&sk->sk_callback_lock);
110 }
111
112 static inline int vcc_writable(struct sock *sk)
113 {
114 struct atm_vcc *vcc = atm_sk(sk);
115
116 return (vcc->qos.txtp.max_sdu +
117 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
118 }
119
120 static void vcc_write_space(struct sock *sk)
121 {
122 read_lock(&sk->sk_callback_lock);
123
124 if (vcc_writable(sk)) {
125 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
126 wake_up_interruptible(sk->sk_sleep);
127
128 sk_wake_async(sk, 2, POLL_OUT);
129 }
130
131 read_unlock(&sk->sk_callback_lock);
132 }
133
134
135 int vcc_create(struct socket *sock, int protocol, int family)
136 {
137 struct sock *sk;
138 struct atm_vcc *vcc;
139
140 sock->sk = NULL;
141 if (sock->type == SOCK_STREAM)
142 return -EINVAL;
143 sk = sk_alloc(family, GFP_KERNEL, 1, NULL);
144 if (!sk)
145 return -ENOMEM;
146 sock_init_data(sock, sk);
147 sk_set_owner(sk, THIS_MODULE);
148 sk->sk_state_change = vcc_def_wakeup;
149 sk->sk_write_space = vcc_write_space;
150
151 vcc = sk->sk_protinfo = kmalloc(sizeof(*vcc), GFP_KERNEL);
152 if (!vcc) {
153 sk_free(sk);
154 return -ENOMEM;
155 }
156
157 memset(vcc, 0, sizeof(*vcc));
158 vcc->sk = sk;
159 vcc->dev = NULL;
160 memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc));
161 memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc));
162 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
163 atomic_set(&vcc->sk->sk_wmem_alloc, 0);
164 atomic_set(&vcc->sk->sk_rmem_alloc, 0);
165 vcc->push = NULL;
166 vcc->pop = NULL;
167 vcc->push_oam = NULL;
168 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
169 vcc->atm_options = vcc->aal_options = 0;
170 sk->sk_destruct = vcc_sock_destruct;
171 sock->sk = sk;
172 return 0;
173 }
174
175
176 static void vcc_destroy_socket(struct sock *sk)
177 {
178 struct atm_vcc *vcc = atm_sk(sk);
179 struct sk_buff *skb;
180
181 clear_bit(ATM_VF_READY, &vcc->flags);
182 if (vcc->dev) {
183 if (vcc->dev->ops->close)
184 vcc->dev->ops->close(vcc);
185 if (vcc->push)
186 vcc->push(vcc, NULL); /* atmarpd has no push */
187
188 vcc_remove_socket(sk); /* no more receive */
189
190 while ((skb = skb_dequeue(&vcc->sk->sk_receive_queue)) != NULL) {
191 atm_return(vcc,skb->truesize);
192 kfree_skb(skb);
193 }
194
195 module_put(vcc->dev->ops->owner);
196 atm_dev_put(vcc->dev);
197 }
198 }
199
200
201 int vcc_release(struct socket *sock)
202 {
203 struct sock *sk = sock->sk;
204
205 if (sk) {
206 lock_sock(sk);
207 vcc_destroy_socket(sock->sk);
208 release_sock(sk);
209 sock_put(sk);
210 }
211
212 return 0;
213 }
214
215
216 void vcc_release_async(struct atm_vcc *vcc, int reply)
217 {
218 set_bit(ATM_VF_CLOSE, &vcc->flags);
219 vcc->sk->sk_err = -reply;
220 clear_bit(ATM_VF_WAITING, &vcc->flags);
221 vcc->sk->sk_state_change(vcc->sk);
222 }
223
224
225 EXPORT_SYMBOL(vcc_release_async);
226
227
228 static int adjust_tp(struct atm_trafprm *tp,unsigned char aal)
229 {
230 int max_sdu;
231
232 if (!tp->traffic_class) return 0;
233 switch (aal) {
234 case ATM_AAL0:
235 max_sdu = ATM_CELL_SIZE-1;
236 break;
237 case ATM_AAL34:
238 max_sdu = ATM_MAX_AAL34_PDU;
239 break;
240 default:
241 printk(KERN_WARNING "ATM: AAL problems ... "
242 "(%d)\n",aal);
243 /* fall through */
244 case ATM_AAL5:
245 max_sdu = ATM_MAX_AAL5_PDU;
246 }
247 if (!tp->max_sdu) tp->max_sdu = max_sdu;
248 else if (tp->max_sdu > max_sdu) return -EINVAL;
249 if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV;
250 return 0;
251 }
252
253
254 static int check_ci(struct atm_vcc *vcc, short vpi, int vci)
255 {
256 struct hlist_head *head = &vcc_hash[vci &
257 (VCC_HTABLE_SIZE - 1)];
258 struct hlist_node *node;
259 struct sock *s;
260 struct atm_vcc *walk;
261
262 sk_for_each(s, node, head) {
263 walk = atm_sk(s);
264 if (walk->dev != vcc->dev)
265 continue;
266 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
267 walk->vci == vci && ((walk->qos.txtp.traffic_class !=
268 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
269 (walk->qos.rxtp.traffic_class != ATM_NONE &&
270 vcc->qos.rxtp.traffic_class != ATM_NONE)))
271 return -EADDRINUSE;
272 }
273
274 /* allow VCCs with same VPI/VCI iff they don't collide on
275 TX/RX (but we may refuse such sharing for other reasons,
276 e.g. if protocol requires to have both channels) */
277
278 return 0;
279 }
280
281
282 static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci)
283 {
284 static short p; /* poor man's per-device cache */
285 static int c;
286 short old_p;
287 int old_c;
288 int err;
289
290 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
291 err = check_ci(vcc, *vpi, *vci);
292 return err;
293 }
294 /* last scan may have left values out of bounds for current device */
295 if (*vpi != ATM_VPI_ANY)
296 p = *vpi;
297 else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
298 p = 0;
299 if (*vci != ATM_VCI_ANY)
300 c = *vci;
301 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
302 c = ATM_NOT_RSV_VCI;
303 old_p = p;
304 old_c = c;
305 do {
306 if (!check_ci(vcc, p, c)) {
307 *vpi = p;
308 *vci = c;
309 return 0;
310 }
311 if (*vci == ATM_VCI_ANY) {
312 c++;
313 if (c >= 1 << vcc->dev->ci_range.vci_bits)
314 c = ATM_NOT_RSV_VCI;
315 }
316 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
317 *vpi == ATM_VPI_ANY) {
318 p++;
319 if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0;
320 }
321 }
322 while (old_p != p || old_c != c);
323 return -EADDRINUSE;
324 }
325
326
327 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
328 int vci)
329 {
330 int error;
331
332 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
333 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
334 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
335 return -EINVAL;
336 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
337 return -EPERM;
338 error = 0;
339 if (!try_module_get(dev->ops->owner))
340 return -ENODEV;
341 vcc->dev = dev;
342 write_lock_irq(&vcc_sklist_lock);
343 if ((error = find_ci(vcc, &vpi, &vci))) {
344 write_unlock_irq(&vcc_sklist_lock);
345 goto fail_module_put;
346 }
347 vcc->vpi = vpi;
348 vcc->vci = vci;
349 __vcc_insert_socket(vcc->sk);
350 write_unlock_irq(&vcc_sklist_lock);
351 switch (vcc->qos.aal) {
352 case ATM_AAL0:
353 error = atm_init_aal0(vcc);
354 vcc->stats = &dev->stats.aal0;
355 break;
356 case ATM_AAL34:
357 error = atm_init_aal34(vcc);
358 vcc->stats = &dev->stats.aal34;
359 break;
360 case ATM_NO_AAL:
361 /* ATM_AAL5 is also used in the "0 for default" case */
362 vcc->qos.aal = ATM_AAL5;
363 /* fall through */
364 case ATM_AAL5:
365 error = atm_init_aal5(vcc);
366 vcc->stats = &dev->stats.aal5;
367 break;
368 default:
369 error = -EPROTOTYPE;
370 }
371 if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal);
372 if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal);
373 if (error)
374 goto fail;
375 DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal);
376 DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class,
377 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu);
378 DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class,
379 vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu);
380
381 if (dev->ops->open) {
382 if ((error = dev->ops->open(vcc)))
383 goto fail;
384 }
385 return 0;
386
387 fail:
388 vcc_remove_socket(vcc->sk);
389 fail_module_put:
390 module_put(dev->ops->owner);
391 /* ensure we get dev module ref count correct */
392 vcc->dev = NULL;
393 return error;
394 }
395
396
397 int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
398 {
399 struct atm_dev *dev;
400 struct atm_vcc *vcc = ATM_SD(sock);
401 int error;
402
403 DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci);
404 if (sock->state == SS_CONNECTED)
405 return -EISCONN;
406 if (sock->state != SS_UNCONNECTED)
407 return -EINVAL;
408 if (!(vpi || vci))
409 return -EINVAL;
410
411 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
412 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
413 else
414 if (test_bit(ATM_VF_PARTIAL,&vcc->flags))
415 return -EINVAL;
416 DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; "
417 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
418 vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr,
419 vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu,
420 vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr,
421 vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
422 vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" :
423 " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
424 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
425 return -EBADFD;
426 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
427 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
428 return -EINVAL;
429 if (itf != ATM_ITF_ANY) {
430 dev = atm_dev_lookup(itf);
431 if (!dev)
432 return -ENODEV;
433 error = __vcc_connect(vcc, dev, vpi, vci);
434 if (error) {
435 atm_dev_put(dev);
436 return error;
437 }
438 } else {
439 struct list_head *p, *next;
440
441 dev = NULL;
442 spin_lock(&atm_dev_lock);
443 list_for_each_safe(p, next, &atm_devs) {
444 dev = list_entry(p, struct atm_dev, dev_list);
445 atm_dev_hold(dev);
446 spin_unlock(&atm_dev_lock);
447 if (!__vcc_connect(vcc, dev, vpi, vci))
448 break;
449 atm_dev_put(dev);
450 dev = NULL;
451 spin_lock(&atm_dev_lock);
452 }
453 spin_unlock(&atm_dev_lock);
454 if (!dev)
455 return -ENODEV;
456 }
457 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
458 set_bit(ATM_VF_PARTIAL,&vcc->flags);
459 if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
460 sock->state = SS_CONNECTED;
461 return 0;
462 }
463
464
465 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
466 size_t size, int flags)
467 {
468 struct sock *sk = sock->sk;
469 struct atm_vcc *vcc;
470 struct sk_buff *skb;
471 int copied, error = -EINVAL;
472
473 if (sock->state != SS_CONNECTED)
474 return -ENOTCONN;
475 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */
476 return -EOPNOTSUPP;
477 vcc = ATM_SD(sock);
478 if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
479 test_bit(ATM_VF_CLOSE,&vcc->flags) ||
480 !test_bit(ATM_VF_READY, &vcc->flags))
481 return 0;
482
483 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
484 if (!skb)
485 return error;
486
487 copied = skb->len;
488 if (copied > size) {
489 copied = size;
490 msg->msg_flags |= MSG_TRUNC;
491 }
492
493 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
494 if (error)
495 return error;
496 sock_recv_timestamp(msg, sk, skb);
497 DPRINTK("RcvM %d -= %d\n", atomic_read(&vcc->sk->rmem_alloc), skb->truesize);
498 atm_return(vcc, skb->truesize);
499 skb_free_datagram(sk, skb);
500 return copied;
501 }
502
503
504 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
505 size_t total_len)
506 {
507 struct sock *sk = sock->sk;
508 DEFINE_WAIT(wait);
509 struct atm_vcc *vcc;
510 struct sk_buff *skb;
511 int eff,error;
512 const void __user *buff;
513 int size;
514
515 lock_sock(sk);
516 if (sock->state != SS_CONNECTED) {
517 error = -ENOTCONN;
518 goto out;
519 }
520 if (m->msg_name) {
521 error = -EISCONN;
522 goto out;
523 }
524 if (m->msg_iovlen != 1) {
525 error = -ENOSYS; /* fix this later @@@ */
526 goto out;
527 }
528 buff = m->msg_iov->iov_base;
529 size = m->msg_iov->iov_len;
530 vcc = ATM_SD(sock);
531 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
532 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
533 !test_bit(ATM_VF_READY, &vcc->flags)) {
534 error = -EPIPE;
535 send_sig(SIGPIPE, current, 0);
536 goto out;
537 }
538 if (!size) {
539 error = 0;
540 goto out;
541 }
542 if (size < 0 || size > vcc->qos.txtp.max_sdu) {
543 error = -EMSGSIZE;
544 goto out;
545 }
546 /* verify_area is done by net/socket.c */
547 eff = (size+3) & ~3; /* align to word boundary */
548 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
549 error = 0;
550 while (!(skb = alloc_tx(vcc,eff))) {
551 if (m->msg_flags & MSG_DONTWAIT) {
552 error = -EAGAIN;
553 break;
554 }
555 schedule();
556 if (signal_pending(current)) {
557 error = -ERESTARTSYS;
558 break;
559 }
560 if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
561 test_bit(ATM_VF_CLOSE,&vcc->flags) ||
562 !test_bit(ATM_VF_READY,&vcc->flags)) {
563 error = -EPIPE;
564 send_sig(SIGPIPE, current, 0);
565 break;
566 }
567 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
568 }
569 finish_wait(sk->sk_sleep, &wait);
570 if (error)
571 goto out;
572 skb->dev = NULL; /* for paths shared with net_device interfaces */
573 ATM_SKB(skb)->atm_options = vcc->atm_options;
574 if (copy_from_user(skb_put(skb,size),buff,size)) {
575 kfree_skb(skb);
576 error = -EFAULT;
577 goto out;
578 }
579 if (eff != size) memset(skb->data+size,0,eff-size);
580 error = vcc->dev->ops->send(vcc,skb);
581 error = error ? error : size;
582 out:
583 release_sock(sk);
584 return error;
585 }
586
587
588 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
589 {
590 struct sock *sk = sock->sk;
591 struct atm_vcc *vcc;
592 unsigned int mask;
593
594 poll_wait(file, sk->sk_sleep, wait);
595 mask = 0;
596
597 vcc = ATM_SD(sock);
598
599 /* exceptional events */
600 if (sk->sk_err)
601 mask = POLLERR;
602
603 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
604 test_bit(ATM_VF_CLOSE, &vcc->flags))
605 mask |= POLLHUP;
606
607 /* readable? */
608 if (!skb_queue_empty(&sk->sk_receive_queue))
609 mask |= POLLIN | POLLRDNORM;
610
611 /* writable? */
612 if (sock->state == SS_CONNECTING &&
613 test_bit(ATM_VF_WAITING, &vcc->flags))
614 return mask;
615
616 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
617 vcc_writable(vcc->sk))
618 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
619
620 return mask;
621 }
622
623
624 static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
625 {
626 int error;
627
628 /*
629 * Don't let the QoS change the already connected AAL type nor the
630 * traffic class.
631 */
632 if (qos->aal != vcc->qos.aal ||
633 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
634 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
635 return -EINVAL;
636 error = adjust_tp(&qos->txtp,qos->aal);
637 if (!error) error = adjust_tp(&qos->rxtp,qos->aal);
638 if (error) return error;
639 if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP;
640 if (vcc->sk->sk_family == AF_ATMPVC)
641 return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET);
642 return svc_change_qos(vcc,qos);
643 }
644
645
646 static int check_tp(struct atm_trafprm *tp)
647 {
648 /* @@@ Should be merged with adjust_tp */
649 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0;
650 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
651 !tp->max_pcr) return -EINVAL;
652 if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL;
653 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
654 tp->min_pcr > tp->max_pcr) return -EINVAL;
655 /*
656 * We allow pcr to be outside [min_pcr,max_pcr], because later
657 * adjustment may still push it in the valid range.
658 */
659 return 0;
660 }
661
662
663 static int check_qos(struct atm_qos *qos)
664 {
665 int error;
666
667 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
668 return -EINVAL;
669 if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
670 qos->txtp.traffic_class && qos->rxtp.traffic_class &&
671 qos->txtp.traffic_class != ATM_ANYCLASS &&
672 qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL;
673 error = check_tp(&qos->txtp);
674 if (error) return error;
675 return check_tp(&qos->rxtp);
676 }
677
678 int vcc_setsockopt(struct socket *sock, int level, int optname,
679 char __user *optval, int optlen)
680 {
681 struct atm_vcc *vcc;
682 unsigned long value;
683 int error;
684
685 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
686 return -EINVAL;
687
688 vcc = ATM_SD(sock);
689 switch (optname) {
690 case SO_ATMQOS:
691 {
692 struct atm_qos qos;
693
694 if (copy_from_user(&qos,optval,sizeof(qos)))
695 return -EFAULT;
696 error = check_qos(&qos);
697 if (error) return error;
698 if (sock->state == SS_CONNECTED)
699 return atm_change_qos(vcc,&qos);
700 if (sock->state != SS_UNCONNECTED)
701 return -EBADFD;
702 vcc->qos = qos;
703 set_bit(ATM_VF_HASQOS,&vcc->flags);
704 return 0;
705 }
706 case SO_SETCLP:
707 if (get_user(value,(unsigned long __user *)optval))
708 return -EFAULT;
709 if (value) vcc->atm_options |= ATM_ATMOPT_CLP;
710 else vcc->atm_options &= ~ATM_ATMOPT_CLP;
711 return 0;
712 default:
713 if (level == SOL_SOCKET) return -EINVAL;
714 break;
715 }
716 if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL;
717 return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen);
718 }
719
720
721 int vcc_getsockopt(struct socket *sock, int level, int optname,
722 char __user *optval, int __user *optlen)
723 {
724 struct atm_vcc *vcc;
725 int len;
726
727 if (get_user(len, optlen))
728 return -EFAULT;
729 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
730 return -EINVAL;
731
732 vcc = ATM_SD(sock);
733 switch (optname) {
734 case SO_ATMQOS:
735 if (!test_bit(ATM_VF_HASQOS,&vcc->flags))
736 return -EINVAL;
737 return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ?
738 -EFAULT : 0;
739 case SO_SETCLP:
740 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 :
741 0,(unsigned long __user *)optval) ? -EFAULT : 0;
742 case SO_ATMPVC:
743 {
744 struct sockaddr_atmpvc pvc;
745
746 if (!vcc->dev ||
747 !test_bit(ATM_VF_ADDR,&vcc->flags))
748 return -ENOTCONN;
749 pvc.sap_family = AF_ATMPVC;
750 pvc.sap_addr.itf = vcc->dev->number;
751 pvc.sap_addr.vpi = vcc->vpi;
752 pvc.sap_addr.vci = vcc->vci;
753 return copy_to_user(optval,&pvc,sizeof(pvc)) ?
754 -EFAULT : 0;
755 }
756 default:
757 if (level == SOL_SOCKET) return -EINVAL;
758 break;
759 }
760 if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL;
761 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
762 }
763
764
765 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
766 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
767 struct net_bridge;
768 struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
769 unsigned char *addr) = NULL;
770 void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent) = NULL;
771 #if defined(CONFIG_ATM_LANE_MODULE) || defined(CONFIG_BRIDGE_MODULE)
772 EXPORT_SYMBOL(br_fdb_get_hook);
773 EXPORT_SYMBOL(br_fdb_put_hook);
774 #endif /* defined(CONFIG_ATM_LANE_MODULE) || defined(CONFIG_BRIDGE_MODULE) */
775 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
776 #endif /* defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) */
777
778
779 static int __init atm_init(void)
780 {
781 int error;
782
783 if ((error = atmpvc_init()) < 0) {
784 printk(KERN_ERR "atmpvc_init() failed with %d\n", error);
785 goto failure;
786 }
787 if ((error = atmsvc_init()) < 0) {
788 printk(KERN_ERR "atmsvc_init() failed with %d\n", error);
789 goto failure;
790 }
791 if ((error = atm_proc_init()) < 0) {
792 printk(KERN_ERR "atm_proc_init() failed with %d\n",error);
793 goto failure;
794 }
795 return 0;
796
797 failure:
798 atmsvc_exit();
799 atmpvc_exit();
800 return error;
801 }
802
803 static void __exit atm_exit(void)
804 {
805 atm_proc_exit();
806 atmsvc_exit();
807 atmpvc_exit();
808 }
809
810 module_init(atm_init);
811 module_exit(atm_exit);
812
813 MODULE_LICENSE("GPL");
814 MODULE_ALIAS_NETPROTO(PF_ATMPVC);
815 MODULE_ALIAS_NETPROTO(PF_ATMSVC);
MOXA 2.6.9 from sdlinux-moxaart.tgz