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sh: Abstract the number of page table levels
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / rose / af_rose.c
blob8feb9e5d66232e22ab8ef5048557ba3bdfd56e98
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
11 */
12
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/in.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/spinlock.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/stat.h>
29 #include <net/net_namespace.h>
30 #include <net/ax25.h>
31 #include <linux/inet.h>
32 #include <linux/netdevice.h>
33 #include <linux/if_arp.h>
34 #include <linux/skbuff.h>
35 #include <net/sock.h>
36 #include <asm/system.h>
37 #include <asm/uaccess.h>
38 #include <linux/fcntl.h>
39 #include <linux/termios.h>
40 #include <linux/mm.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
43 #include <net/rose.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/tcp_states.h>
47 #include <net/ip.h>
48 #include <net/arp.h>
49
50 static int rose_ndevs = 10;
51
52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63 static HLIST_HEAD(rose_list);
64 static DEFINE_SPINLOCK(rose_list_lock);
65
66 static const struct proto_ops rose_proto_ops;
67
68 ax25_address rose_callsign;
69
70 /*
71 * ROSE network devices are virtual network devices encapsulating ROSE
72 * frames into AX.25 which will be sent through an AX.25 device, so form a
73 * special "super class" of normal net devices; split their locks off into a
74 * separate class since they always nest.
75 */
76 static struct lock_class_key rose_netdev_xmit_lock_key;
77 static struct lock_class_key rose_netdev_addr_lock_key;
78
79 static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
82 {
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84 }
85
86 static void rose_set_lockdep_key(struct net_device *dev)
87 {
88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
90 }
91
92 /*
93 * Convert a ROSE address into text.
94 */
95 char *rose2asc(char *buf, const rose_address *addr)
96 {
97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
100 strcpy(buf, "*");
101 } else {
102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
107 }
108
109 return buf;
110 }
111
112 /*
113 * Compare two ROSE addresses, 0 == equal.
114 */
115 int rosecmp(rose_address *addr1, rose_address *addr2)
116 {
117 int i;
118
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121 return 1;
122
123 return 0;
124 }
125
126 /*
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130 {
131 unsigned int i, j;
132
133 if (mask > 10)
134 return 1;
135
136 for (i = 0; i < mask; i++) {
137 j = i / 2;
138
139 if ((i % 2) != 0) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 return 1;
142 } else {
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144 return 1;
145 }
146 }
147
148 return 0;
149 }
150
151 /*
152 * Socket removal during an interrupt is now safe.
153 */
154 static void rose_remove_socket(struct sock *sk)
155 {
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
159 }
160
161 /*
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
164 */
165 void rose_kill_by_neigh(struct rose_neigh *neigh)
166 {
167 struct sock *s;
168 struct hlist_node *node;
169
170 spin_lock_bh(&rose_list_lock);
171 sk_for_each(s, node, &rose_list) {
172 struct rose_sock *rose = rose_sk(s);
173
174 if (rose->neighbour == neigh) {
175 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
176 rose->neighbour->use--;
177 rose->neighbour = NULL;
178 }
179 }
180 spin_unlock_bh(&rose_list_lock);
181 }
182
183 /*
184 * Kill all bound sockets on a dropped device.
185 */
186 static void rose_kill_by_device(struct net_device *dev)
187 {
188 struct sock *s;
189 struct hlist_node *node;
190
191 spin_lock_bh(&rose_list_lock);
192 sk_for_each(s, node, &rose_list) {
193 struct rose_sock *rose = rose_sk(s);
194
195 if (rose->device == dev) {
196 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
197 rose->neighbour->use--;
198 rose->device = NULL;
199 }
200 }
201 spin_unlock_bh(&rose_list_lock);
202 }
203
204 /*
205 * Handle device status changes.
206 */
207 static int rose_device_event(struct notifier_block *this, unsigned long event,
208 void *ptr)
209 {
210 struct net_device *dev = (struct net_device *)ptr;
211
212 if (!net_eq(dev_net(dev), &init_net))
213 return NOTIFY_DONE;
214
215 if (event != NETDEV_DOWN)
216 return NOTIFY_DONE;
217
218 switch (dev->type) {
219 case ARPHRD_ROSE:
220 rose_kill_by_device(dev);
221 break;
222 case ARPHRD_AX25:
223 rose_link_device_down(dev);
224 rose_rt_device_down(dev);
225 break;
226 }
227
228 return NOTIFY_DONE;
229 }
230
231 /*
232 * Add a socket to the bound sockets list.
233 */
234 static void rose_insert_socket(struct sock *sk)
235 {
236
237 spin_lock_bh(&rose_list_lock);
238 sk_add_node(sk, &rose_list);
239 spin_unlock_bh(&rose_list_lock);
240 }
241
242 /*
243 * Find a socket that wants to accept the Call Request we just
244 * received.
245 */
246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
247 {
248 struct sock *s;
249 struct hlist_node *node;
250
251 spin_lock_bh(&rose_list_lock);
252 sk_for_each(s, node, &rose_list) {
253 struct rose_sock *rose = rose_sk(s);
254
255 if (!rosecmp(&rose->source_addr, addr) &&
256 !ax25cmp(&rose->source_call, call) &&
257 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
258 goto found;
259 }
260
261 sk_for_each(s, node, &rose_list) {
262 struct rose_sock *rose = rose_sk(s);
263
264 if (!rosecmp(&rose->source_addr, addr) &&
265 !ax25cmp(&rose->source_call, &null_ax25_address) &&
266 s->sk_state == TCP_LISTEN)
267 goto found;
268 }
269 s = NULL;
270 found:
271 spin_unlock_bh(&rose_list_lock);
272 return s;
273 }
274
275 /*
276 * Find a connected ROSE socket given my LCI and device.
277 */
278 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
279 {
280 struct sock *s;
281 struct hlist_node *node;
282
283 spin_lock_bh(&rose_list_lock);
284 sk_for_each(s, node, &rose_list) {
285 struct rose_sock *rose = rose_sk(s);
286
287 if (rose->lci == lci && rose->neighbour == neigh)
288 goto found;
289 }
290 s = NULL;
291 found:
292 spin_unlock_bh(&rose_list_lock);
293 return s;
294 }
295
296 /*
297 * Find a unique LCI for a given device.
298 */
299 unsigned int rose_new_lci(struct rose_neigh *neigh)
300 {
301 int lci;
302
303 if (neigh->dce_mode) {
304 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
305 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
306 return lci;
307 } else {
308 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
309 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
310 return lci;
311 }
312
313 return 0;
314 }
315
316 /*
317 * Deferred destroy.
318 */
319 void rose_destroy_socket(struct sock *);
320
321 /*
322 * Handler for deferred kills.
323 */
324 static void rose_destroy_timer(unsigned long data)
325 {
326 rose_destroy_socket((struct sock *)data);
327 }
328
329 /*
330 * This is called from user mode and the timers. Thus it protects itself
331 * against interrupt users but doesn't worry about being called during
332 * work. Once it is removed from the queue no interrupt or bottom half
333 * will touch it and we are (fairly 8-) ) safe.
334 */
335 void rose_destroy_socket(struct sock *sk)
336 {
337 struct sk_buff *skb;
338
339 rose_remove_socket(sk);
340 rose_stop_heartbeat(sk);
341 rose_stop_idletimer(sk);
342 rose_stop_timer(sk);
343
344 rose_clear_queues(sk); /* Flush the queues */
345
346 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
347 if (skb->sk != sk) { /* A pending connection */
348 /* Queue the unaccepted socket for death */
349 sock_set_flag(skb->sk, SOCK_DEAD);
350 rose_start_heartbeat(skb->sk);
351 rose_sk(skb->sk)->state = ROSE_STATE_0;
352 }
353
354 kfree_skb(skb);
355 }
356
357 if (sk_has_allocations(sk)) {
358 /* Defer: outstanding buffers */
359 setup_timer(&sk->sk_timer, rose_destroy_timer,
360 (unsigned long)sk);
361 sk->sk_timer.expires = jiffies + 10 * HZ;
362 add_timer(&sk->sk_timer);
363 } else
364 sock_put(sk);
365 }
366
367 /*
368 * Handling for system calls applied via the various interfaces to a
369 * ROSE socket object.
370 */
371
372 static int rose_setsockopt(struct socket *sock, int level, int optname,
373 char __user *optval, unsigned int optlen)
374 {
375 struct sock *sk = sock->sk;
376 struct rose_sock *rose = rose_sk(sk);
377 int opt;
378
379 if (level != SOL_ROSE)
380 return -ENOPROTOOPT;
381
382 if (optlen < sizeof(int))
383 return -EINVAL;
384
385 if (get_user(opt, (int __user *)optval))
386 return -EFAULT;
387
388 switch (optname) {
389 case ROSE_DEFER:
390 rose->defer = opt ? 1 : 0;
391 return 0;
392
393 case ROSE_T1:
394 if (opt < 1)
395 return -EINVAL;
396 rose->t1 = opt * HZ;
397 return 0;
398
399 case ROSE_T2:
400 if (opt < 1)
401 return -EINVAL;
402 rose->t2 = opt * HZ;
403 return 0;
404
405 case ROSE_T3:
406 if (opt < 1)
407 return -EINVAL;
408 rose->t3 = opt * HZ;
409 return 0;
410
411 case ROSE_HOLDBACK:
412 if (opt < 1)
413 return -EINVAL;
414 rose->hb = opt * HZ;
415 return 0;
416
417 case ROSE_IDLE:
418 if (opt < 0)
419 return -EINVAL;
420 rose->idle = opt * 60 * HZ;
421 return 0;
422
423 case ROSE_QBITINCL:
424 rose->qbitincl = opt ? 1 : 0;
425 return 0;
426
427 default:
428 return -ENOPROTOOPT;
429 }
430 }
431
432 static int rose_getsockopt(struct socket *sock, int level, int optname,
433 char __user *optval, int __user *optlen)
434 {
435 struct sock *sk = sock->sk;
436 struct rose_sock *rose = rose_sk(sk);
437 int val = 0;
438 int len;
439
440 if (level != SOL_ROSE)
441 return -ENOPROTOOPT;
442
443 if (get_user(len, optlen))
444 return -EFAULT;
445
446 if (len < 0)
447 return -EINVAL;
448
449 switch (optname) {
450 case ROSE_DEFER:
451 val = rose->defer;
452 break;
453
454 case ROSE_T1:
455 val = rose->t1 / HZ;
456 break;
457
458 case ROSE_T2:
459 val = rose->t2 / HZ;
460 break;
461
462 case ROSE_T3:
463 val = rose->t3 / HZ;
464 break;
465
466 case ROSE_HOLDBACK:
467 val = rose->hb / HZ;
468 break;
469
470 case ROSE_IDLE:
471 val = rose->idle / (60 * HZ);
472 break;
473
474 case ROSE_QBITINCL:
475 val = rose->qbitincl;
476 break;
477
478 default:
479 return -ENOPROTOOPT;
480 }
481
482 len = min_t(unsigned int, len, sizeof(int));
483
484 if (put_user(len, optlen))
485 return -EFAULT;
486
487 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
488 }
489
490 static int rose_listen(struct socket *sock, int backlog)
491 {
492 struct sock *sk = sock->sk;
493
494 if (sk->sk_state != TCP_LISTEN) {
495 struct rose_sock *rose = rose_sk(sk);
496
497 rose->dest_ndigis = 0;
498 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
499 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
500 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
501 sk->sk_max_ack_backlog = backlog;
502 sk->sk_state = TCP_LISTEN;
503 return 0;
504 }
505
506 return -EOPNOTSUPP;
507 }
508
509 static struct proto rose_proto = {
510 .name = "ROSE",
511 .owner = THIS_MODULE,
512 .obj_size = sizeof(struct rose_sock),
513 };
514
515 static int rose_create(struct net *net, struct socket *sock, int protocol,
516 int kern)
517 {
518 struct sock *sk;
519 struct rose_sock *rose;
520
521 if (!net_eq(net, &init_net))
522 return -EAFNOSUPPORT;
523
524 if (sock->type != SOCK_SEQPACKET || protocol != 0)
525 return -ESOCKTNOSUPPORT;
526
527 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
528 if (sk == NULL)
529 return -ENOMEM;
530
531 rose = rose_sk(sk);
532
533 sock_init_data(sock, sk);
534
535 skb_queue_head_init(&rose->ack_queue);
536 #ifdef M_BIT
537 skb_queue_head_init(&rose->frag_queue);
538 rose->fraglen = 0;
539 #endif
540
541 sock->ops = &rose_proto_ops;
542 sk->sk_protocol = protocol;
543
544 init_timer(&rose->timer);
545 init_timer(&rose->idletimer);
546
547 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
548 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
549 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
550 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
551 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
552
553 rose->state = ROSE_STATE_0;
554
555 return 0;
556 }
557
558 static struct sock *rose_make_new(struct sock *osk)
559 {
560 struct sock *sk;
561 struct rose_sock *rose, *orose;
562
563 if (osk->sk_type != SOCK_SEQPACKET)
564 return NULL;
565
566 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
567 if (sk == NULL)
568 return NULL;
569
570 rose = rose_sk(sk);
571
572 sock_init_data(NULL, sk);
573
574 skb_queue_head_init(&rose->ack_queue);
575 #ifdef M_BIT
576 skb_queue_head_init(&rose->frag_queue);
577 rose->fraglen = 0;
578 #endif
579
580 sk->sk_type = osk->sk_type;
581 sk->sk_priority = osk->sk_priority;
582 sk->sk_protocol = osk->sk_protocol;
583 sk->sk_rcvbuf = osk->sk_rcvbuf;
584 sk->sk_sndbuf = osk->sk_sndbuf;
585 sk->sk_state = TCP_ESTABLISHED;
586 sock_copy_flags(sk, osk);
587
588 init_timer(&rose->timer);
589 init_timer(&rose->idletimer);
590
591 orose = rose_sk(osk);
592 rose->t1 = orose->t1;
593 rose->t2 = orose->t2;
594 rose->t3 = orose->t3;
595 rose->hb = orose->hb;
596 rose->idle = orose->idle;
597 rose->defer = orose->defer;
598 rose->device = orose->device;
599 rose->qbitincl = orose->qbitincl;
600
601 return sk;
602 }
603
604 static int rose_release(struct socket *sock)
605 {
606 struct sock *sk = sock->sk;
607 struct rose_sock *rose;
608
609 if (sk == NULL) return 0;
610
611 sock_hold(sk);
612 sock_orphan(sk);
613 lock_sock(sk);
614 rose = rose_sk(sk);
615
616 switch (rose->state) {
617 case ROSE_STATE_0:
618 release_sock(sk);
619 rose_disconnect(sk, 0, -1, -1);
620 lock_sock(sk);
621 rose_destroy_socket(sk);
622 break;
623
624 case ROSE_STATE_2:
625 rose->neighbour->use--;
626 release_sock(sk);
627 rose_disconnect(sk, 0, -1, -1);
628 lock_sock(sk);
629 rose_destroy_socket(sk);
630 break;
631
632 case ROSE_STATE_1:
633 case ROSE_STATE_3:
634 case ROSE_STATE_4:
635 case ROSE_STATE_5:
636 rose_clear_queues(sk);
637 rose_stop_idletimer(sk);
638 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
639 rose_start_t3timer(sk);
640 rose->state = ROSE_STATE_2;
641 sk->sk_state = TCP_CLOSE;
642 sk->sk_shutdown |= SEND_SHUTDOWN;
643 sk->sk_state_change(sk);
644 sock_set_flag(sk, SOCK_DEAD);
645 sock_set_flag(sk, SOCK_DESTROY);
646 break;
647
648 default:
649 break;
650 }
651
652 sock->sk = NULL;
653 release_sock(sk);
654 sock_put(sk);
655
656 return 0;
657 }
658
659 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
660 {
661 struct sock *sk = sock->sk;
662 struct rose_sock *rose = rose_sk(sk);
663 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
664 struct net_device *dev;
665 ax25_address *source;
666 ax25_uid_assoc *user;
667 int n;
668
669 if (!sock_flag(sk, SOCK_ZAPPED))
670 return -EINVAL;
671
672 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
673 return -EINVAL;
674
675 if (addr->srose_family != AF_ROSE)
676 return -EINVAL;
677
678 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
679 return -EINVAL;
680
681 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
682 return -EINVAL;
683
684 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
685 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
686 return -EADDRNOTAVAIL;
687 }
688
689 source = &addr->srose_call;
690
691 user = ax25_findbyuid(current_euid());
692 if (user) {
693 rose->source_call = user->call;
694 ax25_uid_put(user);
695 } else {
696 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
697 return -EACCES;
698 rose->source_call = *source;
699 }
700
701 rose->source_addr = addr->srose_addr;
702 rose->device = dev;
703 rose->source_ndigis = addr->srose_ndigis;
704
705 if (addr_len == sizeof(struct full_sockaddr_rose)) {
706 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
707 for (n = 0 ; n < addr->srose_ndigis ; n++)
708 rose->source_digis[n] = full_addr->srose_digis[n];
709 } else {
710 if (rose->source_ndigis == 1) {
711 rose->source_digis[0] = addr->srose_digi;
712 }
713 }
714
715 rose_insert_socket(sk);
716
717 sock_reset_flag(sk, SOCK_ZAPPED);
718 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
719 return 0;
720 }
721
722 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
723 {
724 struct sock *sk = sock->sk;
725 struct rose_sock *rose = rose_sk(sk);
726 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
727 unsigned char cause, diagnostic;
728 struct net_device *dev;
729 ax25_uid_assoc *user;
730 int n, err = 0;
731
732 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
733 return -EINVAL;
734
735 if (addr->srose_family != AF_ROSE)
736 return -EINVAL;
737
738 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
739 return -EINVAL;
740
741 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
742 return -EINVAL;
743
744 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
745 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
746 return -EINVAL;
747
748 lock_sock(sk);
749
750 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
751 /* Connect completed during a ERESTARTSYS event */
752 sock->state = SS_CONNECTED;
753 goto out_release;
754 }
755
756 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
757 sock->state = SS_UNCONNECTED;
758 err = -ECONNREFUSED;
759 goto out_release;
760 }
761
762 if (sk->sk_state == TCP_ESTABLISHED) {
763 /* No reconnect on a seqpacket socket */
764 err = -EISCONN;
765 goto out_release;
766 }
767
768 sk->sk_state = TCP_CLOSE;
769 sock->state = SS_UNCONNECTED;
770
771 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
772 &diagnostic, 0);
773 if (!rose->neighbour) {
774 err = -ENETUNREACH;
775 goto out_release;
776 }
777
778 rose->lci = rose_new_lci(rose->neighbour);
779 if (!rose->lci) {
780 err = -ENETUNREACH;
781 goto out_release;
782 }
783
784 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
785 sock_reset_flag(sk, SOCK_ZAPPED);
786
787 if ((dev = rose_dev_first()) == NULL) {
788 err = -ENETUNREACH;
789 goto out_release;
790 }
791
792 user = ax25_findbyuid(current_euid());
793 if (!user) {
794 err = -EINVAL;
795 goto out_release;
796 }
797
798 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
799 rose->source_call = user->call;
800 rose->device = dev;
801 ax25_uid_put(user);
802
803 rose_insert_socket(sk); /* Finish the bind */
804 }
805 rose_try_next_neigh:
806 rose->dest_addr = addr->srose_addr;
807 rose->dest_call = addr->srose_call;
808 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
809 rose->dest_ndigis = addr->srose_ndigis;
810
811 if (addr_len == sizeof(struct full_sockaddr_rose)) {
812 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
813 for (n = 0 ; n < addr->srose_ndigis ; n++)
814 rose->dest_digis[n] = full_addr->srose_digis[n];
815 } else {
816 if (rose->dest_ndigis == 1) {
817 rose->dest_digis[0] = addr->srose_digi;
818 }
819 }
820
821 /* Move to connecting socket, start sending Connect Requests */
822 sock->state = SS_CONNECTING;
823 sk->sk_state = TCP_SYN_SENT;
824
825 rose->state = ROSE_STATE_1;
826
827 rose->neighbour->use++;
828
829 rose_write_internal(sk, ROSE_CALL_REQUEST);
830 rose_start_heartbeat(sk);
831 rose_start_t1timer(sk);
832
833 /* Now the loop */
834 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
835 err = -EINPROGRESS;
836 goto out_release;
837 }
838
839 /*
840 * A Connect Ack with Choke or timeout or failed routing will go to
841 * closed.
842 */
843 if (sk->sk_state == TCP_SYN_SENT) {
844 DEFINE_WAIT(wait);
845
846 for (;;) {
847 prepare_to_wait(sk->sk_sleep, &wait,
848 TASK_INTERRUPTIBLE);
849 if (sk->sk_state != TCP_SYN_SENT)
850 break;
851 if (!signal_pending(current)) {
852 release_sock(sk);
853 schedule();
854 lock_sock(sk);
855 continue;
856 }
857 err = -ERESTARTSYS;
858 break;
859 }
860 finish_wait(sk->sk_sleep, &wait);
861
862 if (err)
863 goto out_release;
864 }
865
866 if (sk->sk_state != TCP_ESTABLISHED) {
867 /* Try next neighbour */
868 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
869 if (rose->neighbour)
870 goto rose_try_next_neigh;
871
872 /* No more neighbours */
873 sock->state = SS_UNCONNECTED;
874 err = sock_error(sk); /* Always set at this point */
875 goto out_release;
876 }
877
878 sock->state = SS_CONNECTED;
879
880 out_release:
881 release_sock(sk);
882
883 return err;
884 }
885
886 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
887 {
888 struct sk_buff *skb;
889 struct sock *newsk;
890 DEFINE_WAIT(wait);
891 struct sock *sk;
892 int err = 0;
893
894 if ((sk = sock->sk) == NULL)
895 return -EINVAL;
896
897 lock_sock(sk);
898 if (sk->sk_type != SOCK_SEQPACKET) {
899 err = -EOPNOTSUPP;
900 goto out_release;
901 }
902
903 if (sk->sk_state != TCP_LISTEN) {
904 err = -EINVAL;
905 goto out_release;
906 }
907
908 /*
909 * The write queue this time is holding sockets ready to use
910 * hooked into the SABM we saved
911 */
912 for (;;) {
913 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
914
915 skb = skb_dequeue(&sk->sk_receive_queue);
916 if (skb)
917 break;
918
919 if (flags & O_NONBLOCK) {
920 err = -EWOULDBLOCK;
921 break;
922 }
923 if (!signal_pending(current)) {
924 release_sock(sk);
925 schedule();
926 lock_sock(sk);
927 continue;
928 }
929 err = -ERESTARTSYS;
930 break;
931 }
932 finish_wait(sk->sk_sleep, &wait);
933 if (err)
934 goto out_release;
935
936 newsk = skb->sk;
937 sock_graft(newsk, newsock);
938
939 /* Now attach up the new socket */
940 skb->sk = NULL;
941 kfree_skb(skb);
942 sk->sk_ack_backlog--;
943
944 out_release:
945 release_sock(sk);
946
947 return err;
948 }
949
950 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
951 int *uaddr_len, int peer)
952 {
953 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
954 struct sock *sk = sock->sk;
955 struct rose_sock *rose = rose_sk(sk);
956 int n;
957
958 memset(srose, 0, sizeof(*srose));
959 if (peer != 0) {
960 if (sk->sk_state != TCP_ESTABLISHED)
961 return -ENOTCONN;
962 srose->srose_family = AF_ROSE;
963 srose->srose_addr = rose->dest_addr;
964 srose->srose_call = rose->dest_call;
965 srose->srose_ndigis = rose->dest_ndigis;
966 for (n = 0; n < rose->dest_ndigis; n++)
967 srose->srose_digis[n] = rose->dest_digis[n];
968 } else {
969 srose->srose_family = AF_ROSE;
970 srose->srose_addr = rose->source_addr;
971 srose->srose_call = rose->source_call;
972 srose->srose_ndigis = rose->source_ndigis;
973 for (n = 0; n < rose->source_ndigis; n++)
974 srose->srose_digis[n] = rose->source_digis[n];
975 }
976
977 *uaddr_len = sizeof(struct full_sockaddr_rose);
978 return 0;
979 }
980
981 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
982 {
983 struct sock *sk;
984 struct sock *make;
985 struct rose_sock *make_rose;
986 struct rose_facilities_struct facilities;
987 int n, len;
988
989 skb->sk = NULL; /* Initially we don't know who it's for */
990
991 /*
992 * skb->data points to the rose frame start
993 */
994 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
995
996 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
997 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
998 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
999 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1000 return 0;
1001 }
1002
1003 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1004
1005 /*
1006 * We can't accept the Call Request.
1007 */
1008 if (sk == NULL || sk_acceptq_is_full(sk) ||
1009 (make = rose_make_new(sk)) == NULL) {
1010 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1011 return 0;
1012 }
1013
1014 skb->sk = make;
1015 make->sk_state = TCP_ESTABLISHED;
1016 make_rose = rose_sk(make);
1017
1018 make_rose->lci = lci;
1019 make_rose->dest_addr = facilities.dest_addr;
1020 make_rose->dest_call = facilities.dest_call;
1021 make_rose->dest_ndigis = facilities.dest_ndigis;
1022 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1023 make_rose->dest_digis[n] = facilities.dest_digis[n];
1024 make_rose->source_addr = facilities.source_addr;
1025 make_rose->source_call = facilities.source_call;
1026 make_rose->source_ndigis = facilities.source_ndigis;
1027 for (n = 0 ; n < facilities.source_ndigis ; n++)
1028 make_rose->source_digis[n]= facilities.source_digis[n];
1029 make_rose->neighbour = neigh;
1030 make_rose->device = dev;
1031 make_rose->facilities = facilities;
1032
1033 make_rose->neighbour->use++;
1034
1035 if (rose_sk(sk)->defer) {
1036 make_rose->state = ROSE_STATE_5;
1037 } else {
1038 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1039 make_rose->state = ROSE_STATE_3;
1040 rose_start_idletimer(make);
1041 }
1042
1043 make_rose->condition = 0x00;
1044 make_rose->vs = 0;
1045 make_rose->va = 0;
1046 make_rose->vr = 0;
1047 make_rose->vl = 0;
1048 sk->sk_ack_backlog++;
1049
1050 rose_insert_socket(make);
1051
1052 skb_queue_head(&sk->sk_receive_queue, skb);
1053
1054 rose_start_heartbeat(make);
1055
1056 if (!sock_flag(sk, SOCK_DEAD))
1057 sk->sk_data_ready(sk, skb->len);
1058
1059 return 1;
1060 }
1061
1062 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1063 struct msghdr *msg, size_t len)
1064 {
1065 struct sock *sk = sock->sk;
1066 struct rose_sock *rose = rose_sk(sk);
1067 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1068 int err;
1069 struct full_sockaddr_rose srose;
1070 struct sk_buff *skb;
1071 unsigned char *asmptr;
1072 int n, size, qbit = 0;
1073
1074 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1075 return -EINVAL;
1076
1077 if (sock_flag(sk, SOCK_ZAPPED))
1078 return -EADDRNOTAVAIL;
1079
1080 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1081 send_sig(SIGPIPE, current, 0);
1082 return -EPIPE;
1083 }
1084
1085 if (rose->neighbour == NULL || rose->device == NULL)
1086 return -ENETUNREACH;
1087
1088 if (usrose != NULL) {
1089 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1090 return -EINVAL;
1091 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1092 memcpy(&srose, usrose, msg->msg_namelen);
1093 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1094 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1095 return -EISCONN;
1096 if (srose.srose_ndigis != rose->dest_ndigis)
1097 return -EISCONN;
1098 if (srose.srose_ndigis == rose->dest_ndigis) {
1099 for (n = 0 ; n < srose.srose_ndigis ; n++)
1100 if (ax25cmp(&rose->dest_digis[n],
1101 &srose.srose_digis[n]))
1102 return -EISCONN;
1103 }
1104 if (srose.srose_family != AF_ROSE)
1105 return -EINVAL;
1106 } else {
1107 if (sk->sk_state != TCP_ESTABLISHED)
1108 return -ENOTCONN;
1109
1110 srose.srose_family = AF_ROSE;
1111 srose.srose_addr = rose->dest_addr;
1112 srose.srose_call = rose->dest_call;
1113 srose.srose_ndigis = rose->dest_ndigis;
1114 for (n = 0 ; n < rose->dest_ndigis ; n++)
1115 srose.srose_digis[n] = rose->dest_digis[n];
1116 }
1117
1118 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1119
1120 /* Build a packet */
1121 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1122 /* Sanity check the packet size */
1123 if (len > 65535)
1124 return -EMSGSIZE;
1125
1126 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1127
1128 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1129 return err;
1130
1131 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1132
1133 /*
1134 * Put the data on the end
1135 */
1136 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1137
1138 skb_reset_transport_header(skb);
1139 skb_put(skb, len);
1140
1141 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1142 if (err) {
1143 kfree_skb(skb);
1144 return err;
1145 }
1146
1147 /*
1148 * If the Q BIT Include socket option is in force, the first
1149 * byte of the user data is the logical value of the Q Bit.
1150 */
1151 if (rose->qbitincl) {
1152 qbit = skb->data[0];
1153 skb_pull(skb, 1);
1154 }
1155
1156 /*
1157 * Push down the ROSE header
1158 */
1159 asmptr = skb_push(skb, ROSE_MIN_LEN);
1160
1161 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1162
1163 /* Build a ROSE Network header */
1164 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1165 asmptr[1] = (rose->lci >> 0) & 0xFF;
1166 asmptr[2] = ROSE_DATA;
1167
1168 if (qbit)
1169 asmptr[0] |= ROSE_Q_BIT;
1170
1171 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1172
1173 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1174
1175 if (sk->sk_state != TCP_ESTABLISHED) {
1176 kfree_skb(skb);
1177 return -ENOTCONN;
1178 }
1179
1180 #ifdef M_BIT
1181 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1182 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1183 unsigned char header[ROSE_MIN_LEN];
1184 struct sk_buff *skbn;
1185 int frontlen;
1186 int lg;
1187
1188 /* Save a copy of the Header */
1189 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1190 skb_pull(skb, ROSE_MIN_LEN);
1191
1192 frontlen = skb_headroom(skb);
1193
1194 while (skb->len > 0) {
1195 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1196 kfree_skb(skb);
1197 return err;
1198 }
1199
1200 skbn->sk = sk;
1201 skbn->free = 1;
1202 skbn->arp = 1;
1203
1204 skb_reserve(skbn, frontlen);
1205
1206 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1207
1208 /* Copy the user data */
1209 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1210 skb_pull(skb, lg);
1211
1212 /* Duplicate the Header */
1213 skb_push(skbn, ROSE_MIN_LEN);
1214 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1215
1216 if (skb->len > 0)
1217 skbn->data[2] |= M_BIT;
1218
1219 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1220 }
1221
1222 skb->free = 1;
1223 kfree_skb(skb);
1224 } else {
1225 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1226 }
1227 #else
1228 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1229 #endif
1230
1231 rose_kick(sk);
1232
1233 return len;
1234 }
1235
1236
1237 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1238 struct msghdr *msg, size_t size, int flags)
1239 {
1240 struct sock *sk = sock->sk;
1241 struct rose_sock *rose = rose_sk(sk);
1242 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1243 size_t copied;
1244 unsigned char *asmptr;
1245 struct sk_buff *skb;
1246 int n, er, qbit;
1247
1248 /*
1249 * This works for seqpacket too. The receiver has ordered the queue for
1250 * us! We do one quick check first though
1251 */
1252 if (sk->sk_state != TCP_ESTABLISHED)
1253 return -ENOTCONN;
1254
1255 /* Now we can treat all alike */
1256 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1257 return er;
1258
1259 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1260
1261 skb_pull(skb, ROSE_MIN_LEN);
1262
1263 if (rose->qbitincl) {
1264 asmptr = skb_push(skb, 1);
1265 *asmptr = qbit;
1266 }
1267
1268 skb_reset_transport_header(skb);
1269 copied = skb->len;
1270
1271 if (copied > size) {
1272 copied = size;
1273 msg->msg_flags |= MSG_TRUNC;
1274 }
1275
1276 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1277
1278 if (srose != NULL) {
1279 srose->srose_family = AF_ROSE;
1280 srose->srose_addr = rose->dest_addr;
1281 srose->srose_call = rose->dest_call;
1282 srose->srose_ndigis = rose->dest_ndigis;
1283 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1284 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1285 for (n = 0 ; n < rose->dest_ndigis ; n++)
1286 full_srose->srose_digis[n] = rose->dest_digis[n];
1287 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1288 } else {
1289 if (rose->dest_ndigis >= 1) {
1290 srose->srose_ndigis = 1;
1291 srose->srose_digi = rose->dest_digis[0];
1292 }
1293 msg->msg_namelen = sizeof(struct sockaddr_rose);
1294 }
1295 }
1296
1297 skb_free_datagram(sk, skb);
1298
1299 return copied;
1300 }
1301
1302
1303 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1304 {
1305 struct sock *sk = sock->sk;
1306 struct rose_sock *rose = rose_sk(sk);
1307 void __user *argp = (void __user *)arg;
1308
1309 switch (cmd) {
1310 case TIOCOUTQ: {
1311 long amount;
1312
1313 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1314 if (amount < 0)
1315 amount = 0;
1316 return put_user(amount, (unsigned int __user *) argp);
1317 }
1318
1319 case TIOCINQ: {
1320 struct sk_buff *skb;
1321 long amount = 0L;
1322 /* These two are safe on a single CPU system as only user tasks fiddle here */
1323 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1324 amount = skb->len;
1325 return put_user(amount, (unsigned int __user *) argp);
1326 }
1327
1328 case SIOCGSTAMP:
1329 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1330
1331 case SIOCGSTAMPNS:
1332 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1333
1334 case SIOCGIFADDR:
1335 case SIOCSIFADDR:
1336 case SIOCGIFDSTADDR:
1337 case SIOCSIFDSTADDR:
1338 case SIOCGIFBRDADDR:
1339 case SIOCSIFBRDADDR:
1340 case SIOCGIFNETMASK:
1341 case SIOCSIFNETMASK:
1342 case SIOCGIFMETRIC:
1343 case SIOCSIFMETRIC:
1344 return -EINVAL;
1345
1346 case SIOCADDRT:
1347 case SIOCDELRT:
1348 case SIOCRSCLRRT:
1349 if (!capable(CAP_NET_ADMIN))
1350 return -EPERM;
1351 return rose_rt_ioctl(cmd, argp);
1352
1353 case SIOCRSGCAUSE: {
1354 struct rose_cause_struct rose_cause;
1355 rose_cause.cause = rose->cause;
1356 rose_cause.diagnostic = rose->diagnostic;
1357 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1358 }
1359
1360 case SIOCRSSCAUSE: {
1361 struct rose_cause_struct rose_cause;
1362 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1363 return -EFAULT;
1364 rose->cause = rose_cause.cause;
1365 rose->diagnostic = rose_cause.diagnostic;
1366 return 0;
1367 }
1368
1369 case SIOCRSSL2CALL:
1370 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1371 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1372 ax25_listen_release(&rose_callsign, NULL);
1373 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1374 return -EFAULT;
1375 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1376 return ax25_listen_register(&rose_callsign, NULL);
1377
1378 return 0;
1379
1380 case SIOCRSGL2CALL:
1381 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1382
1383 case SIOCRSACCEPT:
1384 if (rose->state == ROSE_STATE_5) {
1385 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1386 rose_start_idletimer(sk);
1387 rose->condition = 0x00;
1388 rose->vs = 0;
1389 rose->va = 0;
1390 rose->vr = 0;
1391 rose->vl = 0;
1392 rose->state = ROSE_STATE_3;
1393 }
1394 return 0;
1395
1396 default:
1397 return -ENOIOCTLCMD;
1398 }
1399
1400 return 0;
1401 }
1402
1403 #ifdef CONFIG_PROC_FS
1404 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1405 __acquires(rose_list_lock)
1406 {
1407 int i;
1408 struct sock *s;
1409 struct hlist_node *node;
1410
1411 spin_lock_bh(&rose_list_lock);
1412 if (*pos == 0)
1413 return SEQ_START_TOKEN;
1414
1415 i = 1;
1416 sk_for_each(s, node, &rose_list) {
1417 if (i == *pos)
1418 return s;
1419 ++i;
1420 }
1421 return NULL;
1422 }
1423
1424 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1425 {
1426 ++*pos;
1427
1428 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1429 : sk_next((struct sock *)v);
1430 }
1431
1432 static void rose_info_stop(struct seq_file *seq, void *v)
1433 __releases(rose_list_lock)
1434 {
1435 spin_unlock_bh(&rose_list_lock);
1436 }
1437
1438 static int rose_info_show(struct seq_file *seq, void *v)
1439 {
1440 char buf[11], rsbuf[11];
1441
1442 if (v == SEQ_START_TOKEN)
1443 seq_puts(seq,
1444 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1445
1446 else {
1447 struct sock *s = v;
1448 struct rose_sock *rose = rose_sk(s);
1449 const char *devname, *callsign;
1450 const struct net_device *dev = rose->device;
1451
1452 if (!dev)
1453 devname = "???";
1454 else
1455 devname = dev->name;
1456
1457 seq_printf(seq, "%-10s %-9s ",
1458 rose2asc(rsbuf, &rose->dest_addr),
1459 ax2asc(buf, &rose->dest_call));
1460
1461 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1462 callsign = "??????-?";
1463 else
1464 callsign = ax2asc(buf, &rose->source_call);
1465
1466 seq_printf(seq,
1467 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1468 rose2asc(rsbuf, &rose->source_addr),
1469 callsign,
1470 devname,
1471 rose->lci & 0x0FFF,
1472 (rose->neighbour) ? rose->neighbour->number : 0,
1473 rose->state,
1474 rose->vs,
1475 rose->vr,
1476 rose->va,
1477 ax25_display_timer(&rose->timer) / HZ,
1478 rose->t1 / HZ,
1479 rose->t2 / HZ,
1480 rose->t3 / HZ,
1481 rose->hb / HZ,
1482 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1483 rose->idle / (60 * HZ),
1484 sk_wmem_alloc_get(s),
1485 sk_rmem_alloc_get(s),
1486 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1487 }
1488
1489 return 0;
1490 }
1491
1492 static const struct seq_operations rose_info_seqops = {
1493 .start = rose_info_start,
1494 .next = rose_info_next,
1495 .stop = rose_info_stop,
1496 .show = rose_info_show,
1497 };
1498
1499 static int rose_info_open(struct inode *inode, struct file *file)
1500 {
1501 return seq_open(file, &rose_info_seqops);
1502 }
1503
1504 static const struct file_operations rose_info_fops = {
1505 .owner = THIS_MODULE,
1506 .open = rose_info_open,
1507 .read = seq_read,
1508 .llseek = seq_lseek,
1509 .release = seq_release,
1510 };
1511 #endif /* CONFIG_PROC_FS */
1512
1513 static const struct net_proto_family rose_family_ops = {
1514 .family = PF_ROSE,
1515 .create = rose_create,
1516 .owner = THIS_MODULE,
1517 };
1518
1519 static const struct proto_ops rose_proto_ops = {
1520 .family = PF_ROSE,
1521 .owner = THIS_MODULE,
1522 .release = rose_release,
1523 .bind = rose_bind,
1524 .connect = rose_connect,
1525 .socketpair = sock_no_socketpair,
1526 .accept = rose_accept,
1527 .getname = rose_getname,
1528 .poll = datagram_poll,
1529 .ioctl = rose_ioctl,
1530 .listen = rose_listen,
1531 .shutdown = sock_no_shutdown,
1532 .setsockopt = rose_setsockopt,
1533 .getsockopt = rose_getsockopt,
1534 .sendmsg = rose_sendmsg,
1535 .recvmsg = rose_recvmsg,
1536 .mmap = sock_no_mmap,
1537 .sendpage = sock_no_sendpage,
1538 };
1539
1540 static struct notifier_block rose_dev_notifier = {
1541 .notifier_call = rose_device_event,
1542 };
1543
1544 static struct net_device **dev_rose;
1545
1546 static struct ax25_protocol rose_pid = {
1547 .pid = AX25_P_ROSE,
1548 .func = rose_route_frame
1549 };
1550
1551 static struct ax25_linkfail rose_linkfail_notifier = {
1552 .func = rose_link_failed
1553 };
1554
1555 static int __init rose_proto_init(void)
1556 {
1557 int i;
1558 int rc;
1559
1560 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1561 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1562 rc = -EINVAL;
1563 goto out;
1564 }
1565
1566 rc = proto_register(&rose_proto, 0);
1567 if (rc != 0)
1568 goto out;
1569
1570 rose_callsign = null_ax25_address;
1571
1572 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1573 if (dev_rose == NULL) {
1574 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1575 rc = -ENOMEM;
1576 goto out_proto_unregister;
1577 }
1578
1579 for (i = 0; i < rose_ndevs; i++) {
1580 struct net_device *dev;
1581 char name[IFNAMSIZ];
1582
1583 sprintf(name, "rose%d", i);
1584 dev = alloc_netdev(0, name, rose_setup);
1585 if (!dev) {
1586 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1587 rc = -ENOMEM;
1588 goto fail;
1589 }
1590 rc = register_netdev(dev);
1591 if (rc) {
1592 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1593 free_netdev(dev);
1594 goto fail;
1595 }
1596 rose_set_lockdep_key(dev);
1597 dev_rose[i] = dev;
1598 }
1599
1600 sock_register(&rose_family_ops);
1601 register_netdevice_notifier(&rose_dev_notifier);
1602
1603 ax25_register_pid(&rose_pid);
1604 ax25_linkfail_register(&rose_linkfail_notifier);
1605
1606 #ifdef CONFIG_SYSCTL
1607 rose_register_sysctl();
1608 #endif
1609 rose_loopback_init();
1610
1611 rose_add_loopback_neigh();
1612
1613 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1614 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1615 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1616 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1617 out:
1618 return rc;
1619 fail:
1620 while (--i >= 0) {
1621 unregister_netdev(dev_rose[i]);
1622 free_netdev(dev_rose[i]);
1623 }
1624 kfree(dev_rose);
1625 out_proto_unregister:
1626 proto_unregister(&rose_proto);
1627 goto out;
1628 }
1629 module_init(rose_proto_init);
1630
1631 module_param(rose_ndevs, int, 0);
1632 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1633
1634 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1635 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1636 MODULE_LICENSE("GPL");
1637 MODULE_ALIAS_NETPROTO(PF_ROSE);
1638
1639 static void __exit rose_exit(void)
1640 {
1641 int i;
1642
1643 proc_net_remove(&init_net, "rose");
1644 proc_net_remove(&init_net, "rose_neigh");
1645 proc_net_remove(&init_net, "rose_nodes");
1646 proc_net_remove(&init_net, "rose_routes");
1647 rose_loopback_clear();
1648
1649 rose_rt_free();
1650
1651 ax25_protocol_release(AX25_P_ROSE);
1652 ax25_linkfail_release(&rose_linkfail_notifier);
1653
1654 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1655 ax25_listen_release(&rose_callsign, NULL);
1656
1657 #ifdef CONFIG_SYSCTL
1658 rose_unregister_sysctl();
1659 #endif
1660 unregister_netdevice_notifier(&rose_dev_notifier);
1661
1662 sock_unregister(PF_ROSE);
1663
1664 for (i = 0; i < rose_ndevs; i++) {
1665 struct net_device *dev = dev_rose[i];
1666
1667 if (dev) {
1668 unregister_netdev(dev);
1669 free_netdev(dev);
1670 }
1671 }
1672
1673 kfree(dev_rose);
1674 proto_unregister(&rose_proto);
1675 }
1676
1677 module_exit(rose_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree