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viafb: Determine type of 2D engine and store it in chip_info
[linux/fpc-iii.git] / net / atm / common.c
blob74d095a081e3ed0a667ab6805b2c361d51cf81d3
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 #include <linux/uaccess.h>
23 #include <linux/poll.h>
24
25 #include <asm/atomic.h>
26
27 #include "resources.h" /* atm_find_dev */
28 #include "common.h" /* prototypes */
29 #include "protocols.h" /* atm_init_<transport> */
30 #include "addr.h" /* address registry */
31 #include "signaling.h" /* for WAITING and sigd_attach */
32
33 struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
34 EXPORT_SYMBOL(vcc_hash);
35
36 DEFINE_RWLOCK(vcc_sklist_lock);
37 EXPORT_SYMBOL(vcc_sklist_lock);
38
39 static void __vcc_insert_socket(struct sock *sk)
40 {
41 struct atm_vcc *vcc = atm_sk(sk);
42 struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)];
43 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
44 sk_add_node(sk, head);
45 }
46
47 void vcc_insert_socket(struct sock *sk)
48 {
49 write_lock_irq(&vcc_sklist_lock);
50 __vcc_insert_socket(sk);
51 write_unlock_irq(&vcc_sklist_lock);
52 }
53 EXPORT_SYMBOL(vcc_insert_socket);
54
55 static void vcc_remove_socket(struct sock *sk)
56 {
57 write_lock_irq(&vcc_sklist_lock);
58 sk_del_node_init(sk);
59 write_unlock_irq(&vcc_sklist_lock);
60 }
61
62 static struct sk_buff *alloc_tx(struct atm_vcc *vcc, unsigned int size)
63 {
64 struct sk_buff *skb;
65 struct sock *sk = sk_atm(vcc);
66
67 if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
68 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
69 sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
70 return NULL;
71 }
72 while (!(skb = alloc_skb(size, GFP_KERNEL)))
73 schedule();
74 pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
75 atomic_add(skb->truesize, &sk->sk_wmem_alloc);
76 return skb;
77 }
78
79 static void vcc_sock_destruct(struct sock *sk)
80 {
81 if (atomic_read(&sk->sk_rmem_alloc))
82 printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
83 __func__, atomic_read(&sk->sk_rmem_alloc));
84
85 if (atomic_read(&sk->sk_wmem_alloc))
86 printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
87 __func__, atomic_read(&sk->sk_wmem_alloc));
88 }
89
90 static void vcc_def_wakeup(struct sock *sk)
91 {
92 read_lock(&sk->sk_callback_lock);
93 if (sk_has_sleeper(sk))
94 wake_up(sk->sk_sleep);
95 read_unlock(&sk->sk_callback_lock);
96 }
97
98 static inline int vcc_writable(struct sock *sk)
99 {
100 struct atm_vcc *vcc = atm_sk(sk);
101
102 return (vcc->qos.txtp.max_sdu +
103 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
104 }
105
106 static void vcc_write_space(struct sock *sk)
107 {
108 read_lock(&sk->sk_callback_lock);
109
110 if (vcc_writable(sk)) {
111 if (sk_has_sleeper(sk))
112 wake_up_interruptible(sk->sk_sleep);
113
114 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
115 }
116
117 read_unlock(&sk->sk_callback_lock);
118 }
119
120 static struct proto vcc_proto = {
121 .name = "VCC",
122 .owner = THIS_MODULE,
123 .obj_size = sizeof(struct atm_vcc),
124 };
125
126 int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
127 {
128 struct sock *sk;
129 struct atm_vcc *vcc;
130
131 sock->sk = NULL;
132 if (sock->type == SOCK_STREAM)
133 return -EINVAL;
134 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto);
135 if (!sk)
136 return -ENOMEM;
137 sock_init_data(sock, sk);
138 sk->sk_state_change = vcc_def_wakeup;
139 sk->sk_write_space = vcc_write_space;
140
141 vcc = atm_sk(sk);
142 vcc->dev = NULL;
143 memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
144 memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
145 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
146 atomic_set(&sk->sk_wmem_alloc, 1);
147 atomic_set(&sk->sk_rmem_alloc, 0);
148 vcc->push = NULL;
149 vcc->pop = NULL;
150 vcc->push_oam = NULL;
151 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
152 vcc->atm_options = vcc->aal_options = 0;
153 sk->sk_destruct = vcc_sock_destruct;
154 return 0;
155 }
156
157 static void vcc_destroy_socket(struct sock *sk)
158 {
159 struct atm_vcc *vcc = atm_sk(sk);
160 struct sk_buff *skb;
161
162 set_bit(ATM_VF_CLOSE, &vcc->flags);
163 clear_bit(ATM_VF_READY, &vcc->flags);
164 if (vcc->dev) {
165 if (vcc->dev->ops->close)
166 vcc->dev->ops->close(vcc);
167 if (vcc->push)
168 vcc->push(vcc, NULL); /* atmarpd has no push */
169
170 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
171 atm_return(vcc, skb->truesize);
172 kfree_skb(skb);
173 }
174
175 module_put(vcc->dev->ops->owner);
176 atm_dev_put(vcc->dev);
177 }
178
179 vcc_remove_socket(sk);
180 }
181
182 int vcc_release(struct socket *sock)
183 {
184 struct sock *sk = sock->sk;
185
186 if (sk) {
187 lock_sock(sk);
188 vcc_destroy_socket(sock->sk);
189 release_sock(sk);
190 sock_put(sk);
191 }
192
193 return 0;
194 }
195
196 void vcc_release_async(struct atm_vcc *vcc, int reply)
197 {
198 struct sock *sk = sk_atm(vcc);
199
200 set_bit(ATM_VF_CLOSE, &vcc->flags);
201 sk->sk_shutdown |= RCV_SHUTDOWN;
202 sk->sk_err = -reply;
203 clear_bit(ATM_VF_WAITING, &vcc->flags);
204 sk->sk_state_change(sk);
205 }
206 EXPORT_SYMBOL(vcc_release_async);
207
208
209 void atm_dev_release_vccs(struct atm_dev *dev)
210 {
211 int i;
212
213 write_lock_irq(&vcc_sklist_lock);
214 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
215 struct hlist_head *head = &vcc_hash[i];
216 struct hlist_node *node, *tmp;
217 struct sock *s;
218 struct atm_vcc *vcc;
219
220 sk_for_each_safe(s, node, tmp, head) {
221 vcc = atm_sk(s);
222 if (vcc->dev == dev) {
223 vcc_release_async(vcc, -EPIPE);
224 sk_del_node_init(s);
225 }
226 }
227 }
228 write_unlock_irq(&vcc_sklist_lock);
229 }
230
231 static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
232 {
233 int max_sdu;
234
235 if (!tp->traffic_class)
236 return 0;
237 switch (aal) {
238 case ATM_AAL0:
239 max_sdu = ATM_CELL_SIZE-1;
240 break;
241 case ATM_AAL34:
242 max_sdu = ATM_MAX_AAL34_PDU;
243 break;
244 default:
245 pr_warning("AAL problems ... (%d)\n", aal);
246 /* fall through */
247 case ATM_AAL5:
248 max_sdu = ATM_MAX_AAL5_PDU;
249 }
250 if (!tp->max_sdu)
251 tp->max_sdu = max_sdu;
252 else if (tp->max_sdu > max_sdu)
253 return -EINVAL;
254 if (!tp->max_cdv)
255 tp->max_cdv = ATM_MAX_CDV;
256 return 0;
257 }
258
259 static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
260 {
261 struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)];
262 struct hlist_node *node;
263 struct sock *s;
264 struct atm_vcc *walk;
265
266 sk_for_each(s, node, head) {
267 walk = atm_sk(s);
268 if (walk->dev != vcc->dev)
269 continue;
270 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
271 walk->vci == vci && ((walk->qos.txtp.traffic_class !=
272 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
273 (walk->qos.rxtp.traffic_class != ATM_NONE &&
274 vcc->qos.rxtp.traffic_class != ATM_NONE)))
275 return -EADDRINUSE;
276 }
277
278 /* allow VCCs with same VPI/VCI iff they don't collide on
279 TX/RX (but we may refuse such sharing for other reasons,
280 e.g. if protocol requires to have both channels) */
281
282 return 0;
283 }
284
285 static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
286 {
287 static short p; /* poor man's per-device cache */
288 static int c;
289 short old_p;
290 int old_c;
291 int err;
292
293 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
294 err = check_ci(vcc, *vpi, *vci);
295 return err;
296 }
297 /* last scan may have left values out of bounds for current device */
298 if (*vpi != ATM_VPI_ANY)
299 p = *vpi;
300 else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
301 p = 0;
302 if (*vci != ATM_VCI_ANY)
303 c = *vci;
304 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
305 c = ATM_NOT_RSV_VCI;
306 old_p = p;
307 old_c = c;
308 do {
309 if (!check_ci(vcc, p, c)) {
310 *vpi = p;
311 *vci = c;
312 return 0;
313 }
314 if (*vci == ATM_VCI_ANY) {
315 c++;
316 if (c >= 1 << vcc->dev->ci_range.vci_bits)
317 c = ATM_NOT_RSV_VCI;
318 }
319 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
320 *vpi == ATM_VPI_ANY) {
321 p++;
322 if (p >= 1 << vcc->dev->ci_range.vpi_bits)
323 p = 0;
324 }
325 } while (old_p != p || old_c != c);
326 return -EADDRINUSE;
327 }
328
329 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
330 int vci)
331 {
332 struct sock *sk = sk_atm(vcc);
333 int error;
334
335 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
336 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
337 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
338 return -EINVAL;
339 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
340 return -EPERM;
341 error = -ENODEV;
342 if (!try_module_get(dev->ops->owner))
343 return error;
344 vcc->dev = dev;
345 write_lock_irq(&vcc_sklist_lock);
346 if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
347 (error = find_ci(vcc, &vpi, &vci))) {
348 write_unlock_irq(&vcc_sklist_lock);
349 goto fail_module_put;
350 }
351 vcc->vpi = vpi;
352 vcc->vci = vci;
353 __vcc_insert_socket(sk);
354 write_unlock_irq(&vcc_sklist_lock);
355 switch (vcc->qos.aal) {
356 case ATM_AAL0:
357 error = atm_init_aal0(vcc);
358 vcc->stats = &dev->stats.aal0;
359 break;
360 case ATM_AAL34:
361 error = atm_init_aal34(vcc);
362 vcc->stats = &dev->stats.aal34;
363 break;
364 case ATM_NO_AAL:
365 /* ATM_AAL5 is also used in the "0 for default" case */
366 vcc->qos.aal = ATM_AAL5;
367 /* fall through */
368 case ATM_AAL5:
369 error = atm_init_aal5(vcc);
370 vcc->stats = &dev->stats.aal5;
371 break;
372 default:
373 error = -EPROTOTYPE;
374 }
375 if (!error)
376 error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal);
377 if (!error)
378 error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal);
379 if (error)
380 goto fail;
381 pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
382 pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
383 vcc->qos.txtp.traffic_class,
384 vcc->qos.txtp.min_pcr,
385 vcc->qos.txtp.max_pcr,
386 vcc->qos.txtp.max_sdu);
387 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
388 vcc->qos.rxtp.traffic_class,
389 vcc->qos.rxtp.min_pcr,
390 vcc->qos.rxtp.max_pcr,
391 vcc->qos.rxtp.max_sdu);
392
393 if (dev->ops->open) {
394 error = dev->ops->open(vcc);
395 if (error)
396 goto fail;
397 }
398 return 0;
399
400 fail:
401 vcc_remove_socket(sk);
402 fail_module_put:
403 module_put(dev->ops->owner);
404 /* ensure we get dev module ref count correct */
405 vcc->dev = NULL;
406 return error;
407 }
408
409 int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
410 {
411 struct atm_dev *dev;
412 struct atm_vcc *vcc = ATM_SD(sock);
413 int error;
414
415 pr_debug("(vpi %d, vci %d)\n", vpi, vci);
416 if (sock->state == SS_CONNECTED)
417 return -EISCONN;
418 if (sock->state != SS_UNCONNECTED)
419 return -EINVAL;
420 if (!(vpi || vci))
421 return -EINVAL;
422
423 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
424 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
425 else
426 if (test_bit(ATM_VF_PARTIAL, &vcc->flags))
427 return -EINVAL;
428 pr_debug("(TX: cl %d,bw %d-%d,sdu %d; "
429 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
430 vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr,
431 vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu,
432 vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr,
433 vcc->qos.rxtp.max_pcr, vcc->qos.rxtp.max_sdu,
434 vcc->qos.aal == ATM_AAL5 ? "" :
435 vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ",
436 vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
437 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
438 return -EBADFD;
439 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
440 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
441 return -EINVAL;
442 if (likely(itf != ATM_ITF_ANY)) {
443 dev = try_then_request_module(atm_dev_lookup(itf),
444 "atm-device-%d", itf);
445 } else {
446 dev = NULL;
447 mutex_lock(&atm_dev_mutex);
448 if (!list_empty(&atm_devs)) {
449 dev = list_entry(atm_devs.next,
450 struct atm_dev, dev_list);
451 atm_dev_hold(dev);
452 }
453 mutex_unlock(&atm_dev_mutex);
454 }
455 if (!dev)
456 return -ENODEV;
457 error = __vcc_connect(vcc, dev, vpi, vci);
458 if (error) {
459 atm_dev_put(dev);
460 return error;
461 }
462 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
463 set_bit(ATM_VF_PARTIAL, &vcc->flags);
464 if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags))
465 sock->state = SS_CONNECTED;
466 return 0;
467 }
468
469 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
470 size_t size, int flags)
471 {
472 struct sock *sk = sock->sk;
473 struct atm_vcc *vcc;
474 struct sk_buff *skb;
475 int copied, error = -EINVAL;
476
477 if (sock->state != SS_CONNECTED)
478 return -ENOTCONN;
479 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */
480 return -EOPNOTSUPP;
481 vcc = ATM_SD(sock);
482 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
483 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
484 !test_bit(ATM_VF_READY, &vcc->flags))
485 return 0;
486
487 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
488 if (!skb)
489 return error;
490
491 copied = skb->len;
492 if (copied > size) {
493 copied = size;
494 msg->msg_flags |= MSG_TRUNC;
495 }
496
497 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
498 if (error)
499 return error;
500 sock_recv_ts_and_drops(msg, sk, skb);
501 pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize);
502 atm_return(vcc, skb->truesize);
503 skb_free_datagram(sk, skb);
504 return copied;
505 }
506
507 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
508 size_t total_len)
509 {
510 struct sock *sk = sock->sk;
511 DEFINE_WAIT(wait);
512 struct atm_vcc *vcc;
513 struct sk_buff *skb;
514 int eff, error;
515 const void __user *buff;
516 int size;
517
518 lock_sock(sk);
519 if (sock->state != SS_CONNECTED) {
520 error = -ENOTCONN;
521 goto out;
522 }
523 if (m->msg_name) {
524 error = -EISCONN;
525 goto out;
526 }
527 if (m->msg_iovlen != 1) {
528 error = -ENOSYS; /* fix this later @@@ */
529 goto out;
530 }
531 buff = m->msg_iov->iov_base;
532 size = m->msg_iov->iov_len;
533 vcc = ATM_SD(sock);
534 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
535 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
536 !test_bit(ATM_VF_READY, &vcc->flags)) {
537 error = -EPIPE;
538 send_sig(SIGPIPE, current, 0);
539 goto out;
540 }
541 if (!size) {
542 error = 0;
543 goto out;
544 }
545 if (size < 0 || size > vcc->qos.txtp.max_sdu) {
546 error = -EMSGSIZE;
547 goto out;
548 }
549
550 eff = (size+3) & ~3; /* align to word boundary */
551 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
552 error = 0;
553 while (!(skb = alloc_tx(vcc, eff))) {
554 if (m->msg_flags & MSG_DONTWAIT) {
555 error = -EAGAIN;
556 break;
557 }
558 schedule();
559 if (signal_pending(current)) {
560 error = -ERESTARTSYS;
561 break;
562 }
563 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
564 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
565 !test_bit(ATM_VF_READY, &vcc->flags)) {
566 error = -EPIPE;
567 send_sig(SIGPIPE, current, 0);
568 break;
569 }
570 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
571 }
572 finish_wait(sk->sk_sleep, &wait);
573 if (error)
574 goto out;
575 skb->dev = NULL; /* for paths shared with net_device interfaces */
576 ATM_SKB(skb)->atm_options = vcc->atm_options;
577 if (copy_from_user(skb_put(skb, size), buff, size)) {
578 kfree_skb(skb);
579 error = -EFAULT;
580 goto out;
581 }
582 if (eff != size)
583 memset(skb->data + size, 0, eff-size);
584 error = vcc->dev->ops->send(vcc, skb);
585 error = error ? error : size;
586 out:
587 release_sock(sk);
588 return error;
589 }
590
591 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
592 {
593 struct sock *sk = sock->sk;
594 struct atm_vcc *vcc;
595 unsigned int mask;
596
597 sock_poll_wait(file, sk->sk_sleep, wait);
598 mask = 0;
599
600 vcc = ATM_SD(sock);
601
602 /* exceptional events */
603 if (sk->sk_err)
604 mask = POLLERR;
605
606 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
607 test_bit(ATM_VF_CLOSE, &vcc->flags))
608 mask |= POLLHUP;
609
610 /* readable? */
611 if (!skb_queue_empty(&sk->sk_receive_queue))
612 mask |= POLLIN | POLLRDNORM;
613
614 /* writable? */
615 if (sock->state == SS_CONNECTING &&
616 test_bit(ATM_VF_WAITING, &vcc->flags))
617 return mask;
618
619 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
620 vcc_writable(sk))
621 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
622
623 return mask;
624 }
625
626 static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
627 {
628 int error;
629
630 /*
631 * Don't let the QoS change the already connected AAL type nor the
632 * traffic class.
633 */
634 if (qos->aal != vcc->qos.aal ||
635 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
636 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
637 return -EINVAL;
638 error = adjust_tp(&qos->txtp, qos->aal);
639 if (!error)
640 error = adjust_tp(&qos->rxtp, qos->aal);
641 if (error)
642 return error;
643 if (!vcc->dev->ops->change_qos)
644 return -EOPNOTSUPP;
645 if (sk_atm(vcc)->sk_family == AF_ATMPVC)
646 return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET);
647 return svc_change_qos(vcc, qos);
648 }
649
650 static int check_tp(const struct atm_trafprm *tp)
651 {
652 /* @@@ Should be merged with adjust_tp */
653 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS)
654 return 0;
655 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
656 !tp->max_pcr)
657 return -EINVAL;
658 if (tp->min_pcr == ATM_MAX_PCR)
659 return -EINVAL;
660 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
661 tp->min_pcr > tp->max_pcr)
662 return -EINVAL;
663 /*
664 * We allow pcr to be outside [min_pcr,max_pcr], because later
665 * adjustment may still push it in the valid range.
666 */
667 return 0;
668 }
669
670 static int check_qos(const struct atm_qos *qos)
671 {
672 int error;
673
674 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
675 return -EINVAL;
676 if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
677 qos->txtp.traffic_class && qos->rxtp.traffic_class &&
678 qos->txtp.traffic_class != ATM_ANYCLASS &&
679 qos->rxtp.traffic_class != ATM_ANYCLASS)
680 return -EINVAL;
681 error = check_tp(&qos->txtp);
682 if (error)
683 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)
707 return error;
708 if (sock->state == SS_CONNECTED)
709 return atm_change_qos(vcc, &qos);
710 if (sock->state != SS_UNCONNECTED)
711 return -EBADFD;
712 vcc->qos = qos;
713 set_bit(ATM_VF_HASQOS, &vcc->flags);
714 return 0;
715 }
716 case SO_SETCLP:
717 if (get_user(value, (unsigned long __user *)optval))
718 return -EFAULT;
719 if (value)
720 vcc->atm_options |= ATM_ATMOPT_CLP;
721 else
722 vcc->atm_options &= ~ATM_ATMOPT_CLP;
723 return 0;
724 default:
725 if (level == SOL_SOCKET)
726 return -EINVAL;
727 break;
728 }
729 if (!vcc->dev || !vcc->dev->ops->setsockopt)
730 return -EINVAL;
731 return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen);
732 }
733
734 int vcc_getsockopt(struct socket *sock, int level, int optname,
735 char __user *optval, int __user *optlen)
736 {
737 struct atm_vcc *vcc;
738 int len;
739
740 if (get_user(len, optlen))
741 return -EFAULT;
742 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
743 return -EINVAL;
744
745 vcc = ATM_SD(sock);
746 switch (optname) {
747 case SO_ATMQOS:
748 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
749 return -EINVAL;
750 return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos))
751 ? -EFAULT : 0;
752 case SO_SETCLP:
753 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0,
754 (unsigned long __user *)optval) ? -EFAULT : 0;
755 case SO_ATMPVC:
756 {
757 struct sockaddr_atmpvc pvc;
758
759 if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
760 return -ENOTCONN;
761 pvc.sap_family = AF_ATMPVC;
762 pvc.sap_addr.itf = vcc->dev->number;
763 pvc.sap_addr.vpi = vcc->vpi;
764 pvc.sap_addr.vci = vcc->vci;
765 return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0;
766 }
767 default:
768 if (level == SOL_SOCKET)
769 return -EINVAL;
770 break;
771 }
772 if (!vcc->dev || !vcc->dev->ops->getsockopt)
773 return -EINVAL;
774 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
775 }
776
777 static int __init atm_init(void)
778 {
779 int error;
780
781 error = proto_register(&vcc_proto, 0);
782 if (error < 0)
783 goto out;
784 error = atmpvc_init();
785 if (error < 0) {
786 pr_err("atmpvc_init() failed with %d\n", error);
787 goto out_unregister_vcc_proto;
788 }
789 error = atmsvc_init();
790 if (error < 0) {
791 pr_err("atmsvc_init() failed with %d\n", error);
792 goto out_atmpvc_exit;
793 }
794 error = atm_proc_init();
795 if (error < 0) {
796 pr_err("atm_proc_init() failed with %d\n", error);
797 goto out_atmsvc_exit;
798 }
799 error = atm_sysfs_init();
800 if (error < 0) {
801 pr_err("atm_sysfs_init() failed with %d\n", error);
802 goto out_atmproc_exit;
803 }
804 out:
805 return error;
806 out_atmproc_exit:
807 atm_proc_exit();
808 out_atmsvc_exit:
809 atmsvc_exit();
810 out_atmpvc_exit:
811 atmsvc_exit();
812 out_unregister_vcc_proto:
813 proto_unregister(&vcc_proto);
814 goto out;
815 }
816
817 static void __exit atm_exit(void)
818 {
819 atm_proc_exit();
820 atm_sysfs_exit();
821 atmsvc_exit();
822 atmpvc_exit();
823 proto_unregister(&vcc_proto);
824 }
825
826 subsys_initcall(atm_init);
827
828 module_exit(atm_exit);
829
830 MODULE_LICENSE("GPL");
831 MODULE_ALIAS_NETPROTO(PF_ATMPVC);
832 MODULE_ALIAS_NETPROTO(PF_ATMSVC);
Linux with added FPC-III support