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atm: [suni] add support for setting loopback and framing modes
[mirror_ubuntu-zesty-kernel.git] / net / atm / common.c
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 6#include <linux/module.h>
7#include <linux/kmod.h>
8#include <linux/net.h> /* struct socket, struct proto_ops */
9#include <linux/atm.h> /* ATM stuff */
10#include <linux/atmdev.h>
11#include <linux/socket.h> /* SOL_SOCKET */
12#include <linux/errno.h> /* error codes */
13#include <linux/capability.h>
e49332bd 14#include <linux/mm.h>
1da177e4
LT		 15#include <linux/sched.h>
16#include <linux/time.h> /* struct timeval */
17#include <linux/skbuff.h>
18#include <linux/bitops.h>
19#include <linux/init.h>
20#include <net/sock.h> /* struct sock */
21
22#include <asm/uaccess.h>
23#include <asm/atomic.h>
24#include <asm/poll.h>
25
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
1da177e4
LT		 33struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
34DEFINE_RWLOCK(vcc_sklist_lock);
35
36static void __vcc_insert_socket(struct sock *sk)
37{
38 struct atm_vcc *vcc = atm_sk(sk);
39 struct hlist_head *head = &vcc_hash[vcc->vci &
40 (VCC_HTABLE_SIZE - 1)];
81c3d547 41 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
1da177e4
LT		 42 sk_add_node(sk, head);
43}
44
45void vcc_insert_socket(struct sock *sk)
46{
47 write_lock_irq(&vcc_sklist_lock);
48 __vcc_insert_socket(sk);
49 write_unlock_irq(&vcc_sklist_lock);
50}
51
52static void vcc_remove_socket(struct sock *sk)
53{
54 write_lock_irq(&vcc_sklist_lock);
55 sk_del_node_init(sk);
56 write_unlock_irq(&vcc_sklist_lock);
57}
58
59
60static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
61{
62 struct sk_buff *skb;
63 struct sock *sk = sk_atm(vcc);
64
65 if (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) {
52240062 66 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
1da177e4
LT		 67 atomic_read(&sk->sk_wmem_alloc), size,
68 sk->sk_sndbuf);
69 return NULL;
70 }
71 while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule();
52240062 72 pr_debug("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc),
1da177e4
LT		 73 skb->truesize);
74 atomic_add(skb->truesize, &sk->sk_wmem_alloc);
75 return skb;
76}
77
78
79EXPORT_SYMBOL(vcc_hash);
80EXPORT_SYMBOL(vcc_sklist_lock);
81EXPORT_SYMBOL(vcc_insert_socket);
82
83static 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
92static void vcc_def_wakeup(struct sock *sk)
93{
94 read_lock(&sk->sk_callback_lock);
95 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
96 wake_up(sk->sk_sleep);
97 read_unlock(&sk->sk_callback_lock);
98}
99
100static inline int vcc_writable(struct sock *sk)
101{
102 struct atm_vcc *vcc = atm_sk(sk);
103
104 return (vcc->qos.txtp.max_sdu +
f7d57453 105 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
1da177e4
LT		 106}
107
108static void vcc_write_space(struct sock *sk)
f7d57453 109{
1da177e4
LT		 110 read_lock(&sk->sk_callback_lock);
111
112 if (vcc_writable(sk)) {
113 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
114 wake_up_interruptible(sk->sk_sleep);
115
8d8ad9d7 116 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
1da177e4
LT		 117 }
118
119 read_unlock(&sk->sk_callback_lock);
120}
121
122static struct proto vcc_proto = {
123 .name = "VCC",
124 .owner = THIS_MODULE,
125 .obj_size = sizeof(struct atm_vcc),
126};
f7d57453 127
1b8d7ae4 128int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
1da177e4
LT		 129{
130 struct sock *sk;
131 struct atm_vcc *vcc;
132
133 sock->sk = NULL;
134 if (sock->type == SOCK_STREAM)
135 return -EINVAL;
6257ff21 136 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto);
1da177e4
LT		 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, 0);
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
160static 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
1da177e4
LT		 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 }
9301e320
CW		 181
182 vcc_remove_socket(sk);
1da177e4
LT		 183}
184
185
186int 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
201void 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
213EXPORT_SYMBOL(vcc_release_async);
214
215
64bf69dd
SG		 216void 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
1da177e4
LT		 239static 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 printk(KERN_WARNING "ATM: AAL problems ... "
253 "(%d)\n",aal);
254 /* fall through */
255 case ATM_AAL5:
256 max_sdu = ATM_MAX_AAL5_PDU;
257 }
258 if (!tp->max_sdu) tp->max_sdu = max_sdu;
259 else if (tp->max_sdu > max_sdu) return -EINVAL;
260 if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV;
261 return 0;
262}
263
264
265static int check_ci(struct atm_vcc *vcc, short vpi, int vci)
266{
267 struct hlist_head *head = &vcc_hash[vci &
268 (VCC_HTABLE_SIZE - 1)];
269 struct hlist_node *node;
270 struct sock *s;
271 struct atm_vcc *walk;
272
273 sk_for_each(s, node, head) {
274 walk = atm_sk(s);
275 if (walk->dev != vcc->dev)
276 continue;
277 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
278 walk->vci == vci && ((walk->qos.txtp.traffic_class !=
279 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
280 (walk->qos.rxtp.traffic_class != ATM_NONE &&
281 vcc->qos.rxtp.traffic_class != ATM_NONE)))
282 return -EADDRINUSE;
283 }
284
285 /* allow VCCs with same VPI/VCI iff they don't collide on
286 TX/RX (but we may refuse such sharing for other reasons,
287 e.g. if protocol requires to have both channels) */
288
289 return 0;
290}
291
292
293static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci)
294{
295 static short p; /* poor man's per-device cache */
296 static int c;
297 short old_p;
298 int old_c;
299 int err;
300
301 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
302 err = check_ci(vcc, *vpi, *vci);
303 return err;
304 }
305 /* last scan may have left values out of bounds for current device */
306 if (*vpi != ATM_VPI_ANY)
307 p = *vpi;
308 else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
309 p = 0;
310 if (*vci != ATM_VCI_ANY)
311 c = *vci;
312 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
313 c = ATM_NOT_RSV_VCI;
314 old_p = p;
315 old_c = c;
316 do {
317 if (!check_ci(vcc, p, c)) {
318 *vpi = p;
319 *vci = c;
320 return 0;
321 }
322 if (*vci == ATM_VCI_ANY) {
323 c++;
324 if (c >= 1 << vcc->dev->ci_range.vci_bits)
325 c = ATM_NOT_RSV_VCI;
326 }
327 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
328 *vpi == ATM_VPI_ANY) {
329 p++;
330 if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0;
331 }
332 }
333 while (old_p != p || old_c != c);
334 return -EADDRINUSE;
335}
336
337
338static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
339 int vci)
340{
341 struct sock *sk = sk_atm(vcc);
342 int error;
343
344 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
345 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
346 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
347 return -EINVAL;
348 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
349 return -EPERM;
64bf69dd 350 error = -ENODEV;
1da177e4 351 if (!try_module_get(dev->ops->owner))
64bf69dd 352 return error;
1da177e4
LT		 353 vcc->dev = dev;
354 write_lock_irq(&vcc_sklist_lock);
f7d57453 355 if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
64bf69dd 356 (error = find_ci(vcc, &vpi, &vci))) {
1da177e4
LT		 357 write_unlock_irq(&vcc_sklist_lock);
358 goto fail_module_put;
359 }
360 vcc->vpi = vpi;
361 vcc->vci = vci;
362 __vcc_insert_socket(sk);
363 write_unlock_irq(&vcc_sklist_lock);
364 switch (vcc->qos.aal) {
365 case ATM_AAL0:
366 error = atm_init_aal0(vcc);
367 vcc->stats = &dev->stats.aal0;
368 break;
369 case ATM_AAL34:
370 error = atm_init_aal34(vcc);
371 vcc->stats = &dev->stats.aal34;
372 break;
373 case ATM_NO_AAL:
374 /* ATM_AAL5 is also used in the "0 for default" case */
375 vcc->qos.aal = ATM_AAL5;
376 /* fall through */
377 case ATM_AAL5:
378 error = atm_init_aal5(vcc);
379 vcc->stats = &dev->stats.aal5;
380 break;
381 default:
382 error = -EPROTOTYPE;
383 }
384 if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal);
385 if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal);
386 if (error)
387 goto fail;
52240062
SH		 388 pr_debug("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal);
389 pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class,
1da177e4 390 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu);
52240062 391 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class,
1da177e4
LT		 392 vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu);
393
394 if (dev->ops->open) {
395 if ((error = dev->ops->open(vcc)))
396 goto fail;
397 }
398 return 0;
399
400fail:
401 vcc_remove_socket(sk);
402fail_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
410int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
411{
412 struct atm_dev *dev;
413 struct atm_vcc *vcc = ATM_SD(sock);
414 int error;
415
52240062 416 pr_debug("vcc_connect (vpi %d, vci %d)\n",vpi,vci);
1da177e4
LT		 417 if (sock->state == SS_CONNECTED)
418 return -EISCONN;
419 if (sock->state != SS_UNCONNECTED)
420 return -EINVAL;
421 if (!(vpi || vci))
422 return -EINVAL;
423
424 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
425 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
426 else
427 if (test_bit(ATM_VF_PARTIAL,&vcc->flags))
428 return -EINVAL;
52240062 429 pr_debug("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; "
1da177e4
LT		 430 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
431 vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr,
432 vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu,
433 vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr,
434 vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
435 vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" :
436 " ??? code ",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;
c9933d08 442 if (likely(itf != ATM_ITF_ANY)) {
50accc9c 443 dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf);
1da177e4 444 } else {
1da177e4 445 dev = NULL;
57b47a53 446 mutex_lock(&atm_dev_mutex);
c9933d08
MBJ		 447 if (!list_empty(&atm_devs)) {
448 dev = list_entry(atm_devs.next, struct atm_dev, dev_list);
1da177e4 449 atm_dev_hold(dev);
1da177e4 450 }
57b47a53 451 mutex_unlock(&atm_dev_mutex);
c9933d08
MBJ		 452 }
453 if (!dev)
454 return -ENODEV;
455 error = __vcc_connect(vcc, dev, vpi, vci);
456 if (error) {
457 atm_dev_put(dev);
458 return error;
1da177e4
LT		 459 }
460 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
461 set_bit(ATM_VF_PARTIAL,&vcc->flags);
462 if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
463 sock->state = SS_CONNECTED;
464 return 0;
465}
466
467
468int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
469 size_t size, int flags)
470{
471 struct sock *sk = sock->sk;
472 struct atm_vcc *vcc;
473 struct sk_buff *skb;
474 int copied, error = -EINVAL;
475
476 if (sock->state != SS_CONNECTED)
477 return -ENOTCONN;
478 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */
479 return -EOPNOTSUPP;
480 vcc = ATM_SD(sock);
481 if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
482 test_bit(ATM_VF_CLOSE,&vcc->flags) ||
483 !test_bit(ATM_VF_READY, &vcc->flags))
484 return 0;
485
486 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
487 if (!skb)
488 return error;
489
f7d57453 490 copied = skb->len;
1da177e4 491 if (copied > size) {
f7d57453 492 copied = size;
1da177e4
LT		 493 msg->msg_flags |= MSG_TRUNC;
494 }
495
f7d57453
YH		 496 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
497 if (error)
498 return error;
499 sock_recv_timestamp(msg, sk, skb);
52240062 500 pr_debug("RcvM %d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize);
f7d57453
YH		 501 atm_return(vcc, skb->truesize);
502 skb_free_datagram(sk, skb);
503 return copied;
1da177e4
LT		 504}
505
506
507int 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 }
e49332bd 549
1da177e4
LT		 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) memset(skb->data+size,0,eff-size);
583 error = vcc->dev->ops->send(vcc,skb);
584 error = error ? error : size;
585out:
586 release_sock(sk);
587 return error;
588}
589
590
591unsigned 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 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
627static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
628{
629 int error;
630
631 /*
632 * Don't let the QoS change the already connected AAL type nor the
633 * traffic class.
634 */
635 if (qos->aal != vcc->qos.aal ||
636 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
637 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
638 return -EINVAL;
639 error = adjust_tp(&qos->txtp,qos->aal);
640 if (!error) error = adjust_tp(&qos->rxtp,qos->aal);
641 if (error) return error;
642 if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP;
643 if (sk_atm(vcc)->sk_family == AF_ATMPVC)
644 return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET);
645 return svc_change_qos(vcc,qos);
646}
647
648
649static int check_tp(struct atm_trafprm *tp)
650{
651 /* @@@ Should be merged with adjust_tp */
652 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0;
653 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
654 !tp->max_pcr) return -EINVAL;
655 if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL;
656 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
657 tp->min_pcr > tp->max_pcr) return -EINVAL;
658 /*
659 * We allow pcr to be outside [min_pcr,max_pcr], because later
660 * adjustment may still push it in the valid range.
661 */
662 return 0;
663}
664
665
666static int check_qos(struct atm_qos *qos)
667{
668 int error;
669
670 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
f7d57453 671 return -EINVAL;
1da177e4
LT		 672 if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
673 qos->txtp.traffic_class && qos->rxtp.traffic_class &&
674 qos->txtp.traffic_class != ATM_ANYCLASS &&
675 qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL;
676 error = check_tp(&qos->txtp);
677 if (error) return error;
678 return check_tp(&qos->rxtp);
679}
680
681int vcc_setsockopt(struct socket *sock, int level, int optname,
682 char __user *optval, int optlen)
683{
684 struct atm_vcc *vcc;
685 unsigned long value;
686 int error;
687
688 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
689 return -EINVAL;
690
691 vcc = ATM_SD(sock);
692 switch (optname) {
693 case SO_ATMQOS:
694 {
695 struct atm_qos qos;
696
697 if (copy_from_user(&qos,optval,sizeof(qos)))
698 return -EFAULT;
699 error = check_qos(&qos);
700 if (error) return error;
701 if (sock->state == SS_CONNECTED)
702 return atm_change_qos(vcc,&qos);
703 if (sock->state != SS_UNCONNECTED)
704 return -EBADFD;
705 vcc->qos = qos;
706 set_bit(ATM_VF_HASQOS,&vcc->flags);
707 return 0;
708 }
709 case SO_SETCLP:
710 if (get_user(value,(unsigned long __user *)optval))
711 return -EFAULT;
712 if (value) vcc->atm_options |= ATM_ATMOPT_CLP;
713 else vcc->atm_options &= ~ATM_ATMOPT_CLP;
714 return 0;
715 default:
716 if (level == SOL_SOCKET) return -EINVAL;
717 break;
718 }
719 if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL;
720 return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen);
721}
722
723
724int vcc_getsockopt(struct socket *sock, int level, int optname,
725 char __user *optval, int __user *optlen)
726{
727 struct atm_vcc *vcc;
728 int len;
729
730 if (get_user(len, optlen))
731 return -EFAULT;
732 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
733 return -EINVAL;
734
735 vcc = ATM_SD(sock);
736 switch (optname) {
737 case SO_ATMQOS:
738 if (!test_bit(ATM_VF_HASQOS,&vcc->flags))
739 return -EINVAL;
740 return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ?
741 -EFAULT : 0;
742 case SO_SETCLP:
743 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 :
744 0,(unsigned long __user *)optval) ? -EFAULT : 0;
745 case SO_ATMPVC:
746 {
747 struct sockaddr_atmpvc pvc;
748
749 if (!vcc->dev ||
750 !test_bit(ATM_VF_ADDR,&vcc->flags))
751 return -ENOTCONN;
752 pvc.sap_family = AF_ATMPVC;
753 pvc.sap_addr.itf = vcc->dev->number;
754 pvc.sap_addr.vpi = vcc->vpi;
755 pvc.sap_addr.vci = vcc->vci;
756 return copy_to_user(optval,&pvc,sizeof(pvc)) ?
757 -EFAULT : 0;
758 }
759 default:
760 if (level == SOL_SOCKET) return -EINVAL;
761 break;
762 }
763 if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL;
764 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
765}
766
767static int __init atm_init(void)
768{
769 int error;
770
771 if ((error = proto_register(&vcc_proto, 0)) < 0)
772 goto out;
773
774 if ((error = atmpvc_init()) < 0) {
775 printk(KERN_ERR "atmpvc_init() failed with %d\n", error);
776 goto out_unregister_vcc_proto;
777 }
778 if ((error = atmsvc_init()) < 0) {
779 printk(KERN_ERR "atmsvc_init() failed with %d\n", error);
780 goto out_atmpvc_exit;
781 }
f7d57453 782 if ((error = atm_proc_init()) < 0) {
1da177e4
LT		 783 printk(KERN_ERR "atm_proc_init() failed with %d\n",error);
784 goto out_atmsvc_exit;
785 }
f7d57453 786 if ((error = atm_sysfs_init()) < 0) {
656d98b0
RK		 787 printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error);
788 goto out_atmproc_exit;
789 }
1da177e4
LT		 790out:
791 return error;
656d98b0
RK		 792out_atmproc_exit:
793 atm_proc_exit();
1da177e4
LT		 794out_atmsvc_exit:
795 atmsvc_exit();
796out_atmpvc_exit:
797 atmsvc_exit();
798out_unregister_vcc_proto:
799 proto_unregister(&vcc_proto);
800 goto out;
801}
802
803static void __exit atm_exit(void)
804{
805 atm_proc_exit();
656d98b0 806 atm_sysfs_exit();
1da177e4
LT		 807 atmsvc_exit();
808 atmpvc_exit();
809 proto_unregister(&vcc_proto);
810}
811
84ff602e
DW		 812subsys_initcall(atm_init);
813
1da177e4
LT		 814module_exit(atm_exit);
815
816MODULE_LICENSE("GPL");
817MODULE_ALIAS_NETPROTO(PF_ATMPVC);
818MODULE_ALIAS_NETPROTO(PF_ATMSVC);
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