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