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net/atm: Convert printk to pr_<level>
[deliverable/linux.git] / net / atm / common.c
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 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
6
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>
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 struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
35 DEFINE_RWLOCK(vcc_sklist_lock);
36
37 static void __vcc_insert_socket(struct sock *sk)
38 {
39 struct atm_vcc *vcc = atm_sk(sk);
40 struct hlist_head *head = &vcc_hash[vcc->vci &
41 (VCC_HTABLE_SIZE - 1)];
42 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
43 sk_add_node(sk, head);
44 }
45
46 void vcc_insert_socket(struct sock *sk)
47 {
48 write_lock_irq(&vcc_sklist_lock);
49 __vcc_insert_socket(sk);
50 write_unlock_irq(&vcc_sklist_lock);
51 }
52
53 static void vcc_remove_socket(struct sock *sk)
54 {
55 write_lock_irq(&vcc_sklist_lock);
56 sk_del_node_init(sk);
57 write_unlock_irq(&vcc_sklist_lock);
58 }
59
60
61 static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
62 {
63 struct sk_buff *skb;
64 struct sock *sk = sk_atm(vcc);
65
66 if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
67 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
68 sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
69 return NULL;
70 }
71 while (!(skb = alloc_skb(size, GFP_KERNEL)))
72 schedule();
73 pr_debug("AlTx %d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
74 atomic_add(skb->truesize, &sk->sk_wmem_alloc);
75 return skb;
76 }
77
78
79 EXPORT_SYMBOL(vcc_hash);
80 EXPORT_SYMBOL(vcc_sklist_lock);
81 EXPORT_SYMBOL(vcc_insert_socket);
82
83 static void vcc_sock_destruct(struct sock *sk)
84 {
85 if (atomic_read(&sk->sk_rmem_alloc))
86 printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc));
87
88 if (atomic_read(&sk->sk_wmem_alloc))
89 printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc));
90 }
91
92 static void vcc_def_wakeup(struct sock *sk)
93 {
94 read_lock(&sk->sk_callback_lock);
95 if (sk_has_sleeper(sk))
96 wake_up(sk->sk_sleep);
97 read_unlock(&sk->sk_callback_lock);
98 }
99
100 static inline int vcc_writable(struct sock *sk)
101 {
102 struct atm_vcc *vcc = atm_sk(sk);
103
104 return (vcc->qos.txtp.max_sdu +
105 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
106 }
107
108 static void vcc_write_space(struct sock *sk)
109 {
110 read_lock(&sk->sk_callback_lock);
111
112 if (vcc_writable(sk)) {
113 if (sk_has_sleeper(sk))
114 wake_up_interruptible(sk->sk_sleep);
115
116 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
117 }
118
119 read_unlock(&sk->sk_callback_lock);
120 }
121
122 static struct proto vcc_proto = {
123 .name = "VCC",
124 .owner = THIS_MODULE,
125 .obj_size = sizeof(struct atm_vcc),
126 };
127
128 int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
129 {
130 struct sock *sk;
131 struct atm_vcc *vcc;
132
133 sock->sk = NULL;
134 if (sock->type == SOCK_STREAM)
135 return -EINVAL;
136 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto);
137 if (!sk)
138 return -ENOMEM;
139 sock_init_data(sock, sk);
140 sk->sk_state_change = vcc_def_wakeup;
141 sk->sk_write_space = vcc_write_space;
142
143 vcc = atm_sk(sk);
144 vcc->dev = NULL;
145 memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc));
146 memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc));
147 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
148 atomic_set(&sk->sk_wmem_alloc, 1);
149 atomic_set(&sk->sk_rmem_alloc, 0);
150 vcc->push = NULL;
151 vcc->pop = NULL;
152 vcc->push_oam = NULL;
153 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
154 vcc->atm_options = vcc->aal_options = 0;
155 sk->sk_destruct = vcc_sock_destruct;
156 return 0;
157 }
158
159
160 static void vcc_destroy_socket(struct sock *sk)
161 {
162 struct atm_vcc *vcc = atm_sk(sk);
163 struct sk_buff *skb;
164
165 set_bit(ATM_VF_CLOSE, &vcc->flags);
166 clear_bit(ATM_VF_READY, &vcc->flags);
167 if (vcc->dev) {
168 if (vcc->dev->ops->close)
169 vcc->dev->ops->close(vcc);
170 if (vcc->push)
171 vcc->push(vcc, NULL); /* atmarpd has no push */
172
173 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
174 atm_return(vcc,skb->truesize);
175 kfree_skb(skb);
176 }
177
178 module_put(vcc->dev->ops->owner);
179 atm_dev_put(vcc->dev);
180 }
181
182 vcc_remove_socket(sk);
183 }
184
185
186 int vcc_release(struct socket *sock)
187 {
188 struct sock *sk = sock->sk;
189
190 if (sk) {
191 lock_sock(sk);
192 vcc_destroy_socket(sock->sk);
193 release_sock(sk);
194 sock_put(sk);
195 }
196
197 return 0;
198 }
199
200
201 void vcc_release_async(struct atm_vcc *vcc, int reply)
202 {
203 struct sock *sk = sk_atm(vcc);
204
205 set_bit(ATM_VF_CLOSE, &vcc->flags);
206 sk->sk_shutdown |= RCV_SHUTDOWN;
207 sk->sk_err = -reply;
208 clear_bit(ATM_VF_WAITING, &vcc->flags);
209 sk->sk_state_change(sk);
210 }
211
212
213 EXPORT_SYMBOL(vcc_release_async);
214
215
216 void atm_dev_release_vccs(struct atm_dev *dev)
217 {
218 int i;
219
220 write_lock_irq(&vcc_sklist_lock);
221 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
222 struct hlist_head *head = &vcc_hash[i];
223 struct hlist_node *node, *tmp;
224 struct sock *s;
225 struct atm_vcc *vcc;
226
227 sk_for_each_safe(s, node, tmp, head) {
228 vcc = atm_sk(s);
229 if (vcc->dev == dev) {
230 vcc_release_async(vcc, -EPIPE);
231 sk_del_node_init(s);
232 }
233 }
234 }
235 write_unlock_irq(&vcc_sklist_lock);
236 }
237
238
239 static int adjust_tp(struct atm_trafprm *tp,unsigned char aal)
240 {
241 int max_sdu;
242
243 if (!tp->traffic_class) return 0;
244 switch (aal) {
245 case ATM_AAL0:
246 max_sdu = ATM_CELL_SIZE-1;
247 break;
248 case ATM_AAL34:
249 max_sdu = ATM_MAX_AAL34_PDU;
250 break;
251 default:
252 pr_warning("AAL problems ... (%d)\n", aal);
253 /* fall through */
254 case ATM_AAL5:
255 max_sdu = ATM_MAX_AAL5_PDU;
256 }
257 if (!tp->max_sdu) tp->max_sdu = max_sdu;
258 else if (tp->max_sdu > max_sdu) return -EINVAL;
259 if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV;
260 return 0;
261 }
262
263
264 static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
265 {
266 struct hlist_head *head = &vcc_hash[vci &
267 (VCC_HTABLE_SIZE - 1)];
268 struct hlist_node *node;
269 struct sock *s;
270 struct atm_vcc *walk;
271
272 sk_for_each(s, node, head) {
273 walk = atm_sk(s);
274 if (walk->dev != vcc->dev)
275 continue;
276 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
277 walk->vci == vci && ((walk->qos.txtp.traffic_class !=
278 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
279 (walk->qos.rxtp.traffic_class != ATM_NONE &&
280 vcc->qos.rxtp.traffic_class != ATM_NONE)))
281 return -EADDRINUSE;
282 }
283
284 /* allow VCCs with same VPI/VCI iff they don't collide on
285 TX/RX (but we may refuse such sharing for other reasons,
286 e.g. if protocol requires to have both channels) */
287
288 return 0;
289 }
290
291
292 static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
293 {
294 static short p; /* poor man's per-device cache */
295 static int c;
296 short old_p;
297 int old_c;
298 int err;
299
300 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
301 err = check_ci(vcc, *vpi, *vci);
302 return err;
303 }
304 /* last scan may have left values out of bounds for current device */
305 if (*vpi != ATM_VPI_ANY)
306 p = *vpi;
307 else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
308 p = 0;
309 if (*vci != ATM_VCI_ANY)
310 c = *vci;
311 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
312 c = ATM_NOT_RSV_VCI;
313 old_p = p;
314 old_c = c;
315 do {
316 if (!check_ci(vcc, p, c)) {
317 *vpi = p;
318 *vci = c;
319 return 0;
320 }
321 if (*vci == ATM_VCI_ANY) {
322 c++;
323 if (c >= 1 << vcc->dev->ci_range.vci_bits)
324 c = ATM_NOT_RSV_VCI;
325 }
326 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
327 *vpi == ATM_VPI_ANY) {
328 p++;
329 if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0;
330 }
331 }
332 while (old_p != p || old_c != c);
333 return -EADDRINUSE;
334 }
335
336
337 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
338 int vci)
339 {
340 struct sock *sk = sk_atm(vcc);
341 int error;
342
343 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
344 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
345 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
346 return -EINVAL;
347 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
348 return -EPERM;
349 error = -ENODEV;
350 if (!try_module_get(dev->ops->owner))
351 return error;
352 vcc->dev = dev;
353 write_lock_irq(&vcc_sklist_lock);
354 if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
355 (error = find_ci(vcc, &vpi, &vci))) {
356 write_unlock_irq(&vcc_sklist_lock);
357 goto fail_module_put;
358 }
359 vcc->vpi = vpi;
360 vcc->vci = vci;
361 __vcc_insert_socket(sk);
362 write_unlock_irq(&vcc_sklist_lock);
363 switch (vcc->qos.aal) {
364 case ATM_AAL0:
365 error = atm_init_aal0(vcc);
366 vcc->stats = &dev->stats.aal0;
367 break;
368 case ATM_AAL34:
369 error = atm_init_aal34(vcc);
370 vcc->stats = &dev->stats.aal34;
371 break;
372 case ATM_NO_AAL:
373 /* ATM_AAL5 is also used in the "0 for default" case */
374 vcc->qos.aal = ATM_AAL5;
375 /* fall through */
376 case ATM_AAL5:
377 error = atm_init_aal5(vcc);
378 vcc->stats = &dev->stats.aal5;
379 break;
380 default:
381 error = -EPROTOTYPE;
382 }
383 if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal);
384 if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal);
385 if (error)
386 goto fail;
387 pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
388 pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
389 vcc->qos.txtp.traffic_class,
390 vcc->qos.txtp.min_pcr,
391 vcc->qos.txtp.max_pcr,
392 vcc->qos.txtp.max_sdu);
393 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
394 vcc->qos.rxtp.traffic_class,
395 vcc->qos.rxtp.min_pcr,
396 vcc->qos.rxtp.max_pcr,
397 vcc->qos.rxtp.max_sdu);
398
399 if (dev->ops->open) {
400 if ((error = dev->ops->open(vcc)))
401 goto fail;
402 }
403 return 0;
404
405 fail:
406 vcc_remove_socket(sk);
407 fail_module_put:
408 module_put(dev->ops->owner);
409 /* ensure we get dev module ref count correct */
410 vcc->dev = NULL;
411 return error;
412 }
413
414
415 int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
416 {
417 struct atm_dev *dev;
418 struct atm_vcc *vcc = ATM_SD(sock);
419 int error;
420
421 pr_debug("(vpi %d, vci %d)\n", vpi, vci);
422 if (sock->state == SS_CONNECTED)
423 return -EISCONN;
424 if (sock->state != SS_UNCONNECTED)
425 return -EINVAL;
426 if (!(vpi || vci))
427 return -EINVAL;
428
429 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
430 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
431 else
432 if (test_bit(ATM_VF_PARTIAL,&vcc->flags))
433 return -EINVAL;
434 pr_debug("(TX: cl %d,bw %d-%d,sdu %d; "
435 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
436 vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr,
437 vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu,
438 vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr,
439 vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
440 vcc->qos.aal == ATM_AAL5 ? "" :
441 vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ",
442 vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
443 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
444 return -EBADFD;
445 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
446 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
447 return -EINVAL;
448 if (likely(itf != ATM_ITF_ANY)) {
449 dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf);
450 } else {
451 dev = NULL;
452 mutex_lock(&atm_dev_mutex);
453 if (!list_empty(&atm_devs)) {
454 dev = list_entry(atm_devs.next, struct atm_dev, dev_list);
455 atm_dev_hold(dev);
456 }
457 mutex_unlock(&atm_dev_mutex);
458 }
459 if (!dev)
460 return -ENODEV;
461 error = __vcc_connect(vcc, dev, vpi, vci);
462 if (error) {
463 atm_dev_put(dev);
464 return error;
465 }
466 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
467 set_bit(ATM_VF_PARTIAL,&vcc->flags);
468 if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
469 sock->state = SS_CONNECTED;
470 return 0;
471 }
472
473
474 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
475 size_t size, int flags)
476 {
477 struct sock *sk = sock->sk;
478 struct atm_vcc *vcc;
479 struct sk_buff *skb;
480 int copied, error = -EINVAL;
481
482 if (sock->state != SS_CONNECTED)
483 return -ENOTCONN;
484 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */
485 return -EOPNOTSUPP;
486 vcc = ATM_SD(sock);
487 if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
488 test_bit(ATM_VF_CLOSE,&vcc->flags) ||
489 !test_bit(ATM_VF_READY, &vcc->flags))
490 return 0;
491
492 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
493 if (!skb)
494 return error;
495
496 copied = skb->len;
497 if (copied > size) {
498 copied = size;
499 msg->msg_flags |= MSG_TRUNC;
500 }
501
502 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
503 if (error)
504 return error;
505 sock_recv_ts_and_drops(msg, sk, skb);
506 pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize);
507 atm_return(vcc, skb->truesize);
508 skb_free_datagram(sk, skb);
509 return copied;
510 }
511
512
513 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
514 size_t total_len)
515 {
516 struct sock *sk = sock->sk;
517 DEFINE_WAIT(wait);
518 struct atm_vcc *vcc;
519 struct sk_buff *skb;
520 int eff,error;
521 const void __user *buff;
522 int size;
523
524 lock_sock(sk);
525 if (sock->state != SS_CONNECTED) {
526 error = -ENOTCONN;
527 goto out;
528 }
529 if (m->msg_name) {
530 error = -EISCONN;
531 goto out;
532 }
533 if (m->msg_iovlen != 1) {
534 error = -ENOSYS; /* fix this later @@@ */
535 goto out;
536 }
537 buff = m->msg_iov->iov_base;
538 size = m->msg_iov->iov_len;
539 vcc = ATM_SD(sock);
540 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
541 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
542 !test_bit(ATM_VF_READY, &vcc->flags)) {
543 error = -EPIPE;
544 send_sig(SIGPIPE, current, 0);
545 goto out;
546 }
547 if (!size) {
548 error = 0;
549 goto out;
550 }
551 if (size < 0 || size > vcc->qos.txtp.max_sdu) {
552 error = -EMSGSIZE;
553 goto out;
554 }
555
556 eff = (size+3) & ~3; /* align to word boundary */
557 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
558 error = 0;
559 while (!(skb = alloc_tx(vcc,eff))) {
560 if (m->msg_flags & MSG_DONTWAIT) {
561 error = -EAGAIN;
562 break;
563 }
564 schedule();
565 if (signal_pending(current)) {
566 error = -ERESTARTSYS;
567 break;
568 }
569 if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
570 test_bit(ATM_VF_CLOSE,&vcc->flags) ||
571 !test_bit(ATM_VF_READY,&vcc->flags)) {
572 error = -EPIPE;
573 send_sig(SIGPIPE, current, 0);
574 break;
575 }
576 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
577 }
578 finish_wait(sk->sk_sleep, &wait);
579 if (error)
580 goto out;
581 skb->dev = NULL; /* for paths shared with net_device interfaces */
582 ATM_SKB(skb)->atm_options = vcc->atm_options;
583 if (copy_from_user(skb_put(skb,size),buff,size)) {
584 kfree_skb(skb);
585 error = -EFAULT;
586 goto out;
587 }
588 if (eff != size) memset(skb->data+size,0,eff-size);
589 error = vcc->dev->ops->send(vcc,skb);
590 error = error ? error : size;
591 out:
592 release_sock(sk);
593 return error;
594 }
595
596
597 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
598 {
599 struct sock *sk = sock->sk;
600 struct atm_vcc *vcc;
601 unsigned int mask;
602
603 sock_poll_wait(file, sk->sk_sleep, wait);
604 mask = 0;
605
606 vcc = ATM_SD(sock);
607
608 /* exceptional events */
609 if (sk->sk_err)
610 mask = POLLERR;
611
612 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
613 test_bit(ATM_VF_CLOSE, &vcc->flags))
614 mask |= POLLHUP;
615
616 /* readable? */
617 if (!skb_queue_empty(&sk->sk_receive_queue))
618 mask |= POLLIN | POLLRDNORM;
619
620 /* writable? */
621 if (sock->state == SS_CONNECTING &&
622 test_bit(ATM_VF_WAITING, &vcc->flags))
623 return mask;
624
625 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
626 vcc_writable(sk))
627 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
628
629 return mask;
630 }
631
632
633 static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
634 {
635 int error;
636
637 /*
638 * Don't let the QoS change the already connected AAL type nor the
639 * traffic class.
640 */
641 if (qos->aal != vcc->qos.aal ||
642 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
643 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
644 return -EINVAL;
645 error = adjust_tp(&qos->txtp,qos->aal);
646 if (!error) error = adjust_tp(&qos->rxtp,qos->aal);
647 if (error) return error;
648 if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP;
649 if (sk_atm(vcc)->sk_family == AF_ATMPVC)
650 return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET);
651 return svc_change_qos(vcc,qos);
652 }
653
654
655 static int check_tp(const struct atm_trafprm *tp)
656 {
657 /* @@@ Should be merged with adjust_tp */
658 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0;
659 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
660 !tp->max_pcr) return -EINVAL;
661 if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL;
662 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
663 tp->min_pcr > tp->max_pcr) return -EINVAL;
664 /*
665 * We allow pcr to be outside [min_pcr,max_pcr], because later
666 * adjustment may still push it in the valid range.
667 */
668 return 0;
669 }
670
671
672 static int check_qos(const struct atm_qos *qos)
673 {
674 int error;
675
676 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
677 return -EINVAL;
678 if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
679 qos->txtp.traffic_class && qos->rxtp.traffic_class &&
680 qos->txtp.traffic_class != ATM_ANYCLASS &&
681 qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL;
682 error = check_tp(&qos->txtp);
683 if (error) return error;
684 return check_tp(&qos->rxtp);
685 }
686
687 int vcc_setsockopt(struct socket *sock, int level, int optname,
688 char __user *optval, unsigned int optlen)
689 {
690 struct atm_vcc *vcc;
691 unsigned long value;
692 int error;
693
694 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
695 return -EINVAL;
696
697 vcc = ATM_SD(sock);
698 switch (optname) {
699 case SO_ATMQOS:
700 {
701 struct atm_qos qos;
702
703 if (copy_from_user(&qos,optval,sizeof(qos)))
704 return -EFAULT;
705 error = check_qos(&qos);
706 if (error) return error;
707 if (sock->state == SS_CONNECTED)
708 return atm_change_qos(vcc,&qos);
709 if (sock->state != SS_UNCONNECTED)
710 return -EBADFD;
711 vcc->qos = qos;
712 set_bit(ATM_VF_HASQOS,&vcc->flags);
713 return 0;
714 }
715 case SO_SETCLP:
716 if (get_user(value,(unsigned long __user *)optval))
717 return -EFAULT;
718 if (value) vcc->atm_options |= ATM_ATMOPT_CLP;
719 else vcc->atm_options &= ~ATM_ATMOPT_CLP;
720 return 0;
721 default:
722 if (level == SOL_SOCKET) return -EINVAL;
723 break;
724 }
725 if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL;
726 return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen);
727 }
728
729
730 int vcc_getsockopt(struct socket *sock, int level, int optname,
731 char __user *optval, int __user *optlen)
732 {
733 struct atm_vcc *vcc;
734 int len;
735
736 if (get_user(len, optlen))
737 return -EFAULT;
738 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
739 return -EINVAL;
740
741 vcc = ATM_SD(sock);
742 switch (optname) {
743 case SO_ATMQOS:
744 if (!test_bit(ATM_VF_HASQOS,&vcc->flags))
745 return -EINVAL;
746 return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ?
747 -EFAULT : 0;
748 case SO_SETCLP:
749 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 :
750 0,(unsigned long __user *)optval) ? -EFAULT : 0;
751 case SO_ATMPVC:
752 {
753 struct sockaddr_atmpvc pvc;
754
755 if (!vcc->dev ||
756 !test_bit(ATM_VF_ADDR,&vcc->flags))
757 return -ENOTCONN;
758 pvc.sap_family = AF_ATMPVC;
759 pvc.sap_addr.itf = vcc->dev->number;
760 pvc.sap_addr.vpi = vcc->vpi;
761 pvc.sap_addr.vci = vcc->vci;
762 return copy_to_user(optval,&pvc,sizeof(pvc)) ?
763 -EFAULT : 0;
764 }
765 default:
766 if (level == SOL_SOCKET) return -EINVAL;
767 break;
768 }
769 if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL;
770 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
771 }
772
773 static int __init atm_init(void)
774 {
775 int error;
776
777 if ((error = proto_register(&vcc_proto, 0)) < 0)
778 goto out;
779
780 if ((error = atmpvc_init()) < 0) {
781 pr_err("atmpvc_init() failed with %d\n", error);
782 goto out_unregister_vcc_proto;
783 }
784 if ((error = atmsvc_init()) < 0) {
785 pr_err("atmsvc_init() failed with %d\n", error);
786 goto out_atmpvc_exit;
787 }
788 if ((error = atm_proc_init()) < 0) {
789 pr_err("atm_proc_init() failed with %d\n", error);
790 goto out_atmsvc_exit;
791 }
792 if ((error = atm_sysfs_init()) < 0) {
793 pr_err("atm_sysfs_init() failed with %d\n", error);
794 goto out_atmproc_exit;
795 }
796 out:
797 return error;
798 out_atmproc_exit:
799 atm_proc_exit();
800 out_atmsvc_exit:
801 atmsvc_exit();
802 out_atmpvc_exit:
803 atmsvc_exit();
804 out_unregister_vcc_proto:
805 proto_unregister(&vcc_proto);
806 goto out;
807 }
808
809 static void __exit atm_exit(void)
810 {
811 atm_proc_exit();
812 atm_sysfs_exit();
813 atmsvc_exit();
814 atmpvc_exit();
815 proto_unregister(&vcc_proto);
816 }
817
818 subsys_initcall(atm_init);
819
820 module_exit(atm_exit);
821
822 MODULE_LICENSE("GPL");
823 MODULE_ALIAS_NETPROTO(PF_ATMPVC);
824 MODULE_ALIAS_NETPROTO(PF_ATMSVC);
Linux kernel - Deliverables
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