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[linux/fpc-iii.git] / net / decnet / dn_dev.c
blob1bbfce5f7a2dc851094d2a3e286f2e17a642864d
1 /*
2 * DECnet An implementation of the DECnet protocol suite for the LINUX
3 * operating system. DECnet is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * DECnet Device Layer
7 *
8 * Authors: Steve Whitehouse <SteveW@ACM.org>
9 * Eduardo Marcelo Serrat <emserrat@geocities.com>
10 *
11 * Changes:
12 * Steve Whitehouse : Devices now see incoming frames so they
13 * can mark on who it came from.
14 * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
15 * can now have a device specific setup func.
16 * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
17 * Steve Whitehouse : Fixed bug which sometimes killed timer
18 * Steve Whitehouse : Multiple ifaddr support
19 * Steve Whitehouse : SIOCGIFCONF is now a compile time option
20 * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
21 * Steve Whitehouse : Removed timer1 - it's a user space issue now
22 * Patrick Caulfield : Fixed router hello message format
23 * Steve Whitehouse : Got rid of constant sizes for blksize for
24 * devices. All mtu based now.
25 */
26
27 #include <linux/capability.h>
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/init.h>
31 #include <linux/net.h>
32 #include <linux/netdevice.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/timer.h>
36 #include <linux/string.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_arp.h>
39 #include <linux/if_ether.h>
40 #include <linux/skbuff.h>
41 #include <linux/sysctl.h>
42 #include <linux/notifier.h>
43 #include <asm/uaccess.h>
44 #include <asm/system.h>
45 #include <net/net_namespace.h>
46 #include <net/neighbour.h>
47 #include <net/dst.h>
48 #include <net/flow.h>
49 #include <net/fib_rules.h>
50 #include <net/netlink.h>
51 #include <net/dn.h>
52 #include <net/dn_dev.h>
53 #include <net/dn_route.h>
54 #include <net/dn_neigh.h>
55 #include <net/dn_fib.h>
56
57 #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
58
59 static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
60 static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
61 static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
62 static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
63
64 extern struct neigh_table dn_neigh_table;
65
66 /*
67 * decnet_address is kept in network order.
68 */
69 __le16 decnet_address = 0;
70
71 static DEFINE_RWLOCK(dndev_lock);
72 static struct net_device *decnet_default_device;
73 static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
74
75 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
76 static void dn_dev_delete(struct net_device *dev);
77 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
78
79 static int dn_eth_up(struct net_device *);
80 static void dn_eth_down(struct net_device *);
81 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83
84 static struct dn_dev_parms dn_dev_list[] = {
85 {
86 .type = ARPHRD_ETHER, /* Ethernet */
87 .mode = DN_DEV_BCAST,
88 .state = DN_DEV_S_RU,
89 .t2 = 1,
90 .t3 = 10,
91 .name = "ethernet",
92 .ctl_name = NET_DECNET_CONF_ETHER,
93 .up = dn_eth_up,
94 .down = dn_eth_down,
95 .timer3 = dn_send_brd_hello,
96 },
97 {
98 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
99 .mode = DN_DEV_BCAST,
100 .state = DN_DEV_S_RU,
101 .t2 = 1,
102 .t3 = 10,
103 .name = "ipgre",
104 .ctl_name = NET_DECNET_CONF_GRE,
105 .timer3 = dn_send_brd_hello,
106 },
107 #if 0
108 {
109 .type = ARPHRD_X25, /* Bog standard X.25 */
110 .mode = DN_DEV_UCAST,
111 .state = DN_DEV_S_DS,
112 .t2 = 1,
113 .t3 = 120,
114 .name = "x25",
115 .ctl_name = NET_DECNET_CONF_X25,
116 .timer3 = dn_send_ptp_hello,
117 },
118 #endif
119 #if 0
120 {
121 .type = ARPHRD_PPP, /* DECnet over PPP */
122 .mode = DN_DEV_BCAST,
123 .state = DN_DEV_S_RU,
124 .t2 = 1,
125 .t3 = 10,
126 .name = "ppp",
127 .ctl_name = NET_DECNET_CONF_PPP,
128 .timer3 = dn_send_brd_hello,
129 },
130 #endif
131 {
132 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
133 .mode = DN_DEV_UCAST,
134 .state = DN_DEV_S_DS,
135 .t2 = 1,
136 .t3 = 120,
137 .name = "ddcmp",
138 .ctl_name = NET_DECNET_CONF_DDCMP,
139 .timer3 = dn_send_ptp_hello,
140 },
141 {
142 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
143 .mode = DN_DEV_BCAST,
144 .state = DN_DEV_S_RU,
145 .t2 = 1,
146 .t3 = 10,
147 .name = "loopback",
148 .ctl_name = NET_DECNET_CONF_LOOPBACK,
149 .timer3 = dn_send_brd_hello,
150 }
151 };
152
153 #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
154
155 #define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
156
157 #ifdef CONFIG_SYSCTL
158
159 static int min_t2[] = { 1 };
160 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
161 static int min_t3[] = { 1 };
162 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
163
164 static int min_priority[1];
165 static int max_priority[] = { 127 }; /* From DECnet spec */
166
167 static int dn_forwarding_proc(ctl_table *, int, struct file *,
168 void __user *, size_t *, loff_t *);
169 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
170 void __user *oldval, size_t __user *oldlenp,
171 void __user *newval, size_t newlen);
172
173 static struct dn_dev_sysctl_table {
174 struct ctl_table_header *sysctl_header;
175 ctl_table dn_dev_vars[5];
176 } dn_dev_sysctl = {
177 NULL,
178 {
179 {
180 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
181 .procname = "forwarding",
182 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
183 .maxlen = sizeof(int),
184 .mode = 0644,
185 .proc_handler = dn_forwarding_proc,
186 .strategy = dn_forwarding_sysctl,
187 },
188 {
189 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
190 .procname = "priority",
191 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
192 .maxlen = sizeof(int),
193 .mode = 0644,
194 .proc_handler = proc_dointvec_minmax,
195 .strategy = sysctl_intvec,
196 .extra1 = &min_priority,
197 .extra2 = &max_priority
198 },
199 {
200 .ctl_name = NET_DECNET_CONF_DEV_T2,
201 .procname = "t2",
202 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
203 .maxlen = sizeof(int),
204 .mode = 0644,
205 .proc_handler = proc_dointvec_minmax,
206 .strategy = sysctl_intvec,
207 .extra1 = &min_t2,
208 .extra2 = &max_t2
209 },
210 {
211 .ctl_name = NET_DECNET_CONF_DEV_T3,
212 .procname = "t3",
213 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
214 .maxlen = sizeof(int),
215 .mode = 0644,
216 .proc_handler = proc_dointvec_minmax,
217 .strategy = sysctl_intvec,
218 .extra1 = &min_t3,
219 .extra2 = &max_t3
220 },
221 {0}
222 },
223 };
224
225 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
226 {
227 struct dn_dev_sysctl_table *t;
228 int i;
229
230 #define DN_CTL_PATH_DEV 3
231
232 struct ctl_path dn_ctl_path[] = {
233 { .procname = "net", .ctl_name = CTL_NET, },
234 { .procname = "decnet", .ctl_name = NET_DECNET, },
235 { .procname = "conf", .ctl_name = NET_DECNET_CONF, },
236 { /* to be set */ },
237 { },
238 };
239
240 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
241 if (t == NULL)
242 return;
243
244 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
245 long offset = (long)t->dn_dev_vars[i].data;
246 t->dn_dev_vars[i].data = ((char *)parms) + offset;
247 }
248
249 if (dev) {
250 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
251 dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = dev->ifindex;
252 } else {
253 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
254 dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = parms->ctl_name;
255 }
256
257 t->dn_dev_vars[0].extra1 = (void *)dev;
258
259 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
260 if (t->sysctl_header == NULL)
261 kfree(t);
262 else
263 parms->sysctl = t;
264 }
265
266 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
267 {
268 if (parms->sysctl) {
269 struct dn_dev_sysctl_table *t = parms->sysctl;
270 parms->sysctl = NULL;
271 unregister_sysctl_table(t->sysctl_header);
272 kfree(t);
273 }
274 }
275
276 static int dn_forwarding_proc(ctl_table *table, int write,
277 struct file *filep,
278 void __user *buffer,
279 size_t *lenp, loff_t *ppos)
280 {
281 #ifdef CONFIG_DECNET_ROUTER
282 struct net_device *dev = table->extra1;
283 struct dn_dev *dn_db;
284 int err;
285 int tmp, old;
286
287 if (table->extra1 == NULL)
288 return -EINVAL;
289
290 dn_db = dev->dn_ptr;
291 old = dn_db->parms.forwarding;
292
293 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
294
295 if ((err >= 0) && write) {
296 if (dn_db->parms.forwarding < 0)
297 dn_db->parms.forwarding = 0;
298 if (dn_db->parms.forwarding > 2)
299 dn_db->parms.forwarding = 2;
300 /*
301 * What an ugly hack this is... its works, just. It
302 * would be nice if sysctl/proc were just that little
303 * bit more flexible so I don't have to write a special
304 * routine, or suffer hacks like this - SJW
305 */
306 tmp = dn_db->parms.forwarding;
307 dn_db->parms.forwarding = old;
308 if (dn_db->parms.down)
309 dn_db->parms.down(dev);
310 dn_db->parms.forwarding = tmp;
311 if (dn_db->parms.up)
312 dn_db->parms.up(dev);
313 }
314
315 return err;
316 #else
317 return -EINVAL;
318 #endif
319 }
320
321 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
322 void __user *oldval, size_t __user *oldlenp,
323 void __user *newval, size_t newlen)
324 {
325 #ifdef CONFIG_DECNET_ROUTER
326 struct net_device *dev = table->extra1;
327 struct dn_dev *dn_db;
328 int value;
329
330 if (table->extra1 == NULL)
331 return -EINVAL;
332
333 dn_db = dev->dn_ptr;
334
335 if (newval && newlen) {
336 if (newlen != sizeof(int))
337 return -EINVAL;
338
339 if (get_user(value, (int __user *)newval))
340 return -EFAULT;
341 if (value < 0)
342 return -EINVAL;
343 if (value > 2)
344 return -EINVAL;
345
346 if (dn_db->parms.down)
347 dn_db->parms.down(dev);
348 dn_db->parms.forwarding = value;
349 if (dn_db->parms.up)
350 dn_db->parms.up(dev);
351 }
352
353 return 0;
354 #else
355 return -EINVAL;
356 #endif
357 }
358
359 #else /* CONFIG_SYSCTL */
360 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
361 {
362 }
363 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
364 {
365 }
366
367 #endif /* CONFIG_SYSCTL */
368
369 static inline __u16 mtu2blksize(struct net_device *dev)
370 {
371 u32 blksize = dev->mtu;
372 if (blksize > 0xffff)
373 blksize = 0xffff;
374
375 if (dev->type == ARPHRD_ETHER ||
376 dev->type == ARPHRD_PPP ||
377 dev->type == ARPHRD_IPGRE ||
378 dev->type == ARPHRD_LOOPBACK)
379 blksize -= 2;
380
381 return (__u16)blksize;
382 }
383
384 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
385 {
386 struct dn_ifaddr *ifa;
387
388 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
389
390 return ifa;
391 }
392
393 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
394 {
395 kfree(ifa);
396 }
397
398 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
399 {
400 struct dn_ifaddr *ifa1 = *ifap;
401 unsigned char mac_addr[6];
402 struct net_device *dev = dn_db->dev;
403
404 ASSERT_RTNL();
405
406 *ifap = ifa1->ifa_next;
407
408 if (dn_db->dev->type == ARPHRD_ETHER) {
409 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
410 dn_dn2eth(mac_addr, ifa1->ifa_local);
411 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
412 }
413 }
414
415 dn_ifaddr_notify(RTM_DELADDR, ifa1);
416 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
417 if (destroy) {
418 dn_dev_free_ifa(ifa1);
419
420 if (dn_db->ifa_list == NULL)
421 dn_dev_delete(dn_db->dev);
422 }
423 }
424
425 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
426 {
427 struct net_device *dev = dn_db->dev;
428 struct dn_ifaddr *ifa1;
429 unsigned char mac_addr[6];
430
431 ASSERT_RTNL();
432
433 /* Check for duplicates */
434 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
435 if (ifa1->ifa_local == ifa->ifa_local)
436 return -EEXIST;
437 }
438
439 if (dev->type == ARPHRD_ETHER) {
440 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
441 dn_dn2eth(mac_addr, ifa->ifa_local);
442 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
443 }
444 }
445
446 ifa->ifa_next = dn_db->ifa_list;
447 dn_db->ifa_list = ifa;
448
449 dn_ifaddr_notify(RTM_NEWADDR, ifa);
450 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
451
452 return 0;
453 }
454
455 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
456 {
457 struct dn_dev *dn_db = dev->dn_ptr;
458 int rv;
459
460 if (dn_db == NULL) {
461 int err;
462 dn_db = dn_dev_create(dev, &err);
463 if (dn_db == NULL)
464 return err;
465 }
466
467 ifa->ifa_dev = dn_db;
468
469 if (dev->flags & IFF_LOOPBACK)
470 ifa->ifa_scope = RT_SCOPE_HOST;
471
472 rv = dn_dev_insert_ifa(dn_db, ifa);
473 if (rv)
474 dn_dev_free_ifa(ifa);
475 return rv;
476 }
477
478
479 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
480 {
481 char buffer[DN_IFREQ_SIZE];
482 struct ifreq *ifr = (struct ifreq *)buffer;
483 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
484 struct dn_dev *dn_db;
485 struct net_device *dev;
486 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
487 int ret = 0;
488
489 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
490 return -EFAULT;
491 ifr->ifr_name[IFNAMSIZ-1] = 0;
492
493 #ifdef CONFIG_KMOD
494 dev_load(&init_net, ifr->ifr_name);
495 #endif
496
497 switch(cmd) {
498 case SIOCGIFADDR:
499 break;
500 case SIOCSIFADDR:
501 if (!capable(CAP_NET_ADMIN))
502 return -EACCES;
503 if (sdn->sdn_family != AF_DECnet)
504 return -EINVAL;
505 break;
506 default:
507 return -EINVAL;
508 }
509
510 rtnl_lock();
511
512 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
513 ret = -ENODEV;
514 goto done;
515 }
516
517 if ((dn_db = dev->dn_ptr) != NULL) {
518 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
519 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
520 break;
521 }
522
523 if (ifa == NULL && cmd != SIOCSIFADDR) {
524 ret = -EADDRNOTAVAIL;
525 goto done;
526 }
527
528 switch(cmd) {
529 case SIOCGIFADDR:
530 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
531 goto rarok;
532
533 case SIOCSIFADDR:
534 if (!ifa) {
535 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
536 ret = -ENOBUFS;
537 break;
538 }
539 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
540 } else {
541 if (ifa->ifa_local == dn_saddr2dn(sdn))
542 break;
543 dn_dev_del_ifa(dn_db, ifap, 0);
544 }
545
546 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
547
548 ret = dn_dev_set_ifa(dev, ifa);
549 }
550 done:
551 rtnl_unlock();
552
553 return ret;
554 rarok:
555 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
556 ret = -EFAULT;
557 goto done;
558 }
559
560 struct net_device *dn_dev_get_default(void)
561 {
562 struct net_device *dev;
563 read_lock(&dndev_lock);
564 dev = decnet_default_device;
565 if (dev) {
566 if (dev->dn_ptr)
567 dev_hold(dev);
568 else
569 dev = NULL;
570 }
571 read_unlock(&dndev_lock);
572 return dev;
573 }
574
575 int dn_dev_set_default(struct net_device *dev, int force)
576 {
577 struct net_device *old = NULL;
578 int rv = -EBUSY;
579 if (!dev->dn_ptr)
580 return -ENODEV;
581 write_lock(&dndev_lock);
582 if (force || decnet_default_device == NULL) {
583 old = decnet_default_device;
584 decnet_default_device = dev;
585 rv = 0;
586 }
587 write_unlock(&dndev_lock);
588 if (old)
589 dev_put(old);
590 return rv;
591 }
592
593 static void dn_dev_check_default(struct net_device *dev)
594 {
595 write_lock(&dndev_lock);
596 if (dev == decnet_default_device) {
597 decnet_default_device = NULL;
598 } else {
599 dev = NULL;
600 }
601 write_unlock(&dndev_lock);
602 if (dev)
603 dev_put(dev);
604 }
605
606 static struct dn_dev *dn_dev_by_index(int ifindex)
607 {
608 struct net_device *dev;
609 struct dn_dev *dn_dev = NULL;
610 dev = dev_get_by_index(&init_net, ifindex);
611 if (dev) {
612 dn_dev = dev->dn_ptr;
613 dev_put(dev);
614 }
615
616 return dn_dev;
617 }
618
619 static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
620 [IFA_ADDRESS] = { .type = NLA_U16 },
621 [IFA_LOCAL] = { .type = NLA_U16 },
622 [IFA_LABEL] = { .type = NLA_STRING,
623 .len = IFNAMSIZ - 1 },
624 };
625
626 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
627 {
628 struct net *net = skb->sk->sk_net;
629 struct nlattr *tb[IFA_MAX+1];
630 struct dn_dev *dn_db;
631 struct ifaddrmsg *ifm;
632 struct dn_ifaddr *ifa, **ifap;
633 int err = -EINVAL;
634
635 if (net != &init_net)
636 goto errout;
637
638 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
639 if (err < 0)
640 goto errout;
641
642 err = -ENODEV;
643 ifm = nlmsg_data(nlh);
644 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
645 goto errout;
646
647 err = -EADDRNOTAVAIL;
648 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
649 if (tb[IFA_LOCAL] &&
650 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
651 continue;
652
653 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
654 continue;
655
656 dn_dev_del_ifa(dn_db, ifap, 1);
657 return 0;
658 }
659
660 errout:
661 return err;
662 }
663
664 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
665 {
666 struct net *net = skb->sk->sk_net;
667 struct nlattr *tb[IFA_MAX+1];
668 struct net_device *dev;
669 struct dn_dev *dn_db;
670 struct ifaddrmsg *ifm;
671 struct dn_ifaddr *ifa;
672 int err;
673
674 if (net != &init_net)
675 return -EINVAL;
676
677 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
678 if (err < 0)
679 return err;
680
681 if (tb[IFA_LOCAL] == NULL)
682 return -EINVAL;
683
684 ifm = nlmsg_data(nlh);
685 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
686 return -ENODEV;
687
688 if ((dn_db = dev->dn_ptr) == NULL) {
689 int err;
690 dn_db = dn_dev_create(dev, &err);
691 if (!dn_db)
692 return err;
693 }
694
695 if ((ifa = dn_dev_alloc_ifa()) == NULL)
696 return -ENOBUFS;
697
698 if (tb[IFA_ADDRESS] == NULL)
699 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
700
701 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
702 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
703 ifa->ifa_flags = ifm->ifa_flags;
704 ifa->ifa_scope = ifm->ifa_scope;
705 ifa->ifa_dev = dn_db;
706
707 if (tb[IFA_LABEL])
708 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
709 else
710 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
711
712 err = dn_dev_insert_ifa(dn_db, ifa);
713 if (err)
714 dn_dev_free_ifa(ifa);
715
716 return err;
717 }
718
719 static inline size_t dn_ifaddr_nlmsg_size(void)
720 {
721 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
722 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
723 + nla_total_size(2) /* IFA_ADDRESS */
724 + nla_total_size(2); /* IFA_LOCAL */
725 }
726
727 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
728 u32 pid, u32 seq, int event, unsigned int flags)
729 {
730 struct ifaddrmsg *ifm;
731 struct nlmsghdr *nlh;
732
733 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
734 if (nlh == NULL)
735 return -EMSGSIZE;
736
737 ifm = nlmsg_data(nlh);
738 ifm->ifa_family = AF_DECnet;
739 ifm->ifa_prefixlen = 16;
740 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
741 ifm->ifa_scope = ifa->ifa_scope;
742 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
743
744 if (ifa->ifa_address)
745 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
746 if (ifa->ifa_local)
747 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
748 if (ifa->ifa_label[0])
749 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
750
751 return nlmsg_end(skb, nlh);
752
753 nla_put_failure:
754 nlmsg_cancel(skb, nlh);
755 return -EMSGSIZE;
756 }
757
758 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
759 {
760 struct sk_buff *skb;
761 int err = -ENOBUFS;
762
763 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
764 if (skb == NULL)
765 goto errout;
766
767 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
768 if (err < 0) {
769 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
770 WARN_ON(err == -EMSGSIZE);
771 kfree_skb(skb);
772 goto errout;
773 }
774 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
775 errout:
776 if (err < 0)
777 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
778 }
779
780 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
781 {
782 struct net *net = skb->sk->sk_net;
783 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
784 struct net_device *dev;
785 struct dn_dev *dn_db;
786 struct dn_ifaddr *ifa;
787
788 if (net != &init_net)
789 return 0;
790
791 skip_ndevs = cb->args[0];
792 skip_naddr = cb->args[1];
793
794 idx = 0;
795 for_each_netdev(&init_net, dev) {
796 if (idx < skip_ndevs)
797 goto cont;
798 else if (idx > skip_ndevs) {
799 /* Only skip over addresses for first dev dumped
800 * in this iteration (idx == skip_ndevs) */
801 skip_naddr = 0;
802 }
803
804 if ((dn_db = dev->dn_ptr) == NULL)
805 goto cont;
806
807 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
808 ifa = ifa->ifa_next, dn_idx++) {
809 if (dn_idx < skip_naddr)
810 continue;
811
812 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
813 cb->nlh->nlmsg_seq, RTM_NEWADDR,
814 NLM_F_MULTI) < 0)
815 goto done;
816 }
817 cont:
818 idx++;
819 }
820 done:
821 cb->args[0] = idx;
822 cb->args[1] = dn_idx;
823
824 return skb->len;
825 }
826
827 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
828 {
829 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
830 struct dn_ifaddr *ifa;
831 int rv = -ENODEV;
832 if (dn_db == NULL)
833 goto out;
834 ifa = dn_db->ifa_list;
835 if (ifa != NULL) {
836 *addr = ifa->ifa_local;
837 rv = 0;
838 }
839 out:
840 return rv;
841 }
842
843 /*
844 * Find a default address to bind to.
845 *
846 * This is one of those areas where the initial VMS concepts don't really
847 * map onto the Linux concepts, and since we introduced multiple addresses
848 * per interface we have to cope with slightly odd ways of finding out what
849 * "our address" really is. Mostly it's not a problem; for this we just guess
850 * a sensible default. Eventually the routing code will take care of all the
851 * nasties for us I hope.
852 */
853 int dn_dev_bind_default(__le16 *addr)
854 {
855 struct net_device *dev;
856 int rv;
857 dev = dn_dev_get_default();
858 last_chance:
859 if (dev) {
860 read_lock(&dev_base_lock);
861 rv = dn_dev_get_first(dev, addr);
862 read_unlock(&dev_base_lock);
863 dev_put(dev);
864 if (rv == 0 || dev == init_net.loopback_dev)
865 return rv;
866 }
867 dev = init_net.loopback_dev;
868 dev_hold(dev);
869 goto last_chance;
870 }
871
872 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
873 {
874 struct endnode_hello_message *msg;
875 struct sk_buff *skb = NULL;
876 __le16 *pktlen;
877 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
878
879 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
880 return;
881
882 skb->dev = dev;
883
884 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
885
886 msg->msgflg = 0x0D;
887 memcpy(msg->tiver, dn_eco_version, 3);
888 dn_dn2eth(msg->id, ifa->ifa_local);
889 msg->iinfo = DN_RT_INFO_ENDN;
890 msg->blksize = dn_htons(mtu2blksize(dev));
891 msg->area = 0x00;
892 memset(msg->seed, 0, 8);
893 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
894
895 if (dn_db->router) {
896 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
897 dn_dn2eth(msg->neighbor, dn->addr);
898 }
899
900 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
901 msg->mpd = 0x00;
902 msg->datalen = 0x02;
903 memset(msg->data, 0xAA, 2);
904
905 pktlen = (__le16 *)skb_push(skb,2);
906 *pktlen = dn_htons(skb->len - 2);
907
908 skb_reset_network_header(skb);
909
910 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
911 }
912
913
914 #define DRDELAY (5 * HZ)
915
916 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
917 {
918 /* First check time since device went up */
919 if ((jiffies - dn_db->uptime) < DRDELAY)
920 return 0;
921
922 /* If there is no router, then yes... */
923 if (!dn_db->router)
924 return 1;
925
926 /* otherwise only if we have a higher priority or.. */
927 if (dn->priority < dn_db->parms.priority)
928 return 1;
929
930 /* if we have equal priority and a higher node number */
931 if (dn->priority != dn_db->parms.priority)
932 return 0;
933
934 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
935 return 1;
936
937 return 0;
938 }
939
940 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
941 {
942 int n;
943 struct dn_dev *dn_db = dev->dn_ptr;
944 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
945 struct sk_buff *skb;
946 size_t size;
947 unsigned char *ptr;
948 unsigned char *i1, *i2;
949 __le16 *pktlen;
950 char *src;
951
952 if (mtu2blksize(dev) < (26 + 7))
953 return;
954
955 n = mtu2blksize(dev) - 26;
956 n /= 7;
957
958 if (n > 32)
959 n = 32;
960
961 size = 2 + 26 + 7 * n;
962
963 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
964 return;
965
966 skb->dev = dev;
967 ptr = skb_put(skb, size);
968
969 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
970 *ptr++ = 2; /* ECO */
971 *ptr++ = 0;
972 *ptr++ = 0;
973 dn_dn2eth(ptr, ifa->ifa_local);
974 src = ptr;
975 ptr += ETH_ALEN;
976 *ptr++ = dn_db->parms.forwarding == 1 ?
977 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
978 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
979 ptr += 2;
980 *ptr++ = dn_db->parms.priority; /* Priority */
981 *ptr++ = 0; /* Area: Reserved */
982 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
983 ptr += 2;
984 *ptr++ = 0; /* MPD: Reserved */
985 i1 = ptr++;
986 memset(ptr, 0, 7); /* Name: Reserved */
987 ptr += 7;
988 i2 = ptr++;
989
990 n = dn_neigh_elist(dev, ptr, n);
991
992 *i2 = 7 * n;
993 *i1 = 8 + *i2;
994
995 skb_trim(skb, (27 + *i2));
996
997 pktlen = (__le16 *)skb_push(skb, 2);
998 *pktlen = dn_htons(skb->len - 2);
999
1000 skb_reset_network_header(skb);
1001
1002 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1003 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1004 if (skb2) {
1005 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1006 }
1007 }
1008
1009 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1010 }
1011
1012 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1013 {
1014 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1015
1016 if (dn_db->parms.forwarding == 0)
1017 dn_send_endnode_hello(dev, ifa);
1018 else
1019 dn_send_router_hello(dev, ifa);
1020 }
1021
1022 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1023 {
1024 int tdlen = 16;
1025 int size = dev->hard_header_len + 2 + 4 + tdlen;
1026 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1027 int i;
1028 unsigned char *ptr;
1029 char src[ETH_ALEN];
1030
1031 if (skb == NULL)
1032 return ;
1033
1034 skb->dev = dev;
1035 skb_push(skb, dev->hard_header_len);
1036 ptr = skb_put(skb, 2 + 4 + tdlen);
1037
1038 *ptr++ = DN_RT_PKT_HELO;
1039 *((__le16 *)ptr) = ifa->ifa_local;
1040 ptr += 2;
1041 *ptr++ = tdlen;
1042
1043 for(i = 0; i < tdlen; i++)
1044 *ptr++ = 0252;
1045
1046 dn_dn2eth(src, ifa->ifa_local);
1047 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1048 }
1049
1050 static int dn_eth_up(struct net_device *dev)
1051 {
1052 struct dn_dev *dn_db = dev->dn_ptr;
1053
1054 if (dn_db->parms.forwarding == 0)
1055 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1056 else
1057 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1058
1059 dn_db->use_long = 1;
1060
1061 return 0;
1062 }
1063
1064 static void dn_eth_down(struct net_device *dev)
1065 {
1066 struct dn_dev *dn_db = dev->dn_ptr;
1067
1068 if (dn_db->parms.forwarding == 0)
1069 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1070 else
1071 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1072 }
1073
1074 static void dn_dev_set_timer(struct net_device *dev);
1075
1076 static void dn_dev_timer_func(unsigned long arg)
1077 {
1078 struct net_device *dev = (struct net_device *)arg;
1079 struct dn_dev *dn_db = dev->dn_ptr;
1080 struct dn_ifaddr *ifa;
1081
1082 if (dn_db->t3 <= dn_db->parms.t2) {
1083 if (dn_db->parms.timer3) {
1084 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1085 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1086 dn_db->parms.timer3(dev, ifa);
1087 }
1088 }
1089 dn_db->t3 = dn_db->parms.t3;
1090 } else {
1091 dn_db->t3 -= dn_db->parms.t2;
1092 }
1093
1094 dn_dev_set_timer(dev);
1095 }
1096
1097 static void dn_dev_set_timer(struct net_device *dev)
1098 {
1099 struct dn_dev *dn_db = dev->dn_ptr;
1100
1101 if (dn_db->parms.t2 > dn_db->parms.t3)
1102 dn_db->parms.t2 = dn_db->parms.t3;
1103
1104 dn_db->timer.data = (unsigned long)dev;
1105 dn_db->timer.function = dn_dev_timer_func;
1106 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1107
1108 add_timer(&dn_db->timer);
1109 }
1110
1111 struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1112 {
1113 int i;
1114 struct dn_dev_parms *p = dn_dev_list;
1115 struct dn_dev *dn_db;
1116
1117 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1118 if (p->type == dev->type)
1119 break;
1120 }
1121
1122 *err = -ENODEV;
1123 if (i == DN_DEV_LIST_SIZE)
1124 return NULL;
1125
1126 *err = -ENOBUFS;
1127 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1128 return NULL;
1129
1130 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1131 smp_wmb();
1132 dev->dn_ptr = dn_db;
1133 dn_db->dev = dev;
1134 init_timer(&dn_db->timer);
1135
1136 dn_db->uptime = jiffies;
1137
1138 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1139 if (!dn_db->neigh_parms) {
1140 dev->dn_ptr = NULL;
1141 kfree(dn_db);
1142 return NULL;
1143 }
1144
1145 if (dn_db->parms.up) {
1146 if (dn_db->parms.up(dev) < 0) {
1147 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1148 dev->dn_ptr = NULL;
1149 kfree(dn_db);
1150 return NULL;
1151 }
1152 }
1153
1154 dn_dev_sysctl_register(dev, &dn_db->parms);
1155
1156 dn_dev_set_timer(dev);
1157
1158 *err = 0;
1159 return dn_db;
1160 }
1161
1162
1163 /*
1164 * This processes a device up event. We only start up
1165 * the loopback device & ethernet devices with correct
1166 * MAC addreses automatically. Others must be started
1167 * specifically.
1168 *
1169 * FIXME: How should we configure the loopback address ? If we could dispense
1170 * with using decnet_address here and for autobind, it will be one less thing
1171 * for users to worry about setting up.
1172 */
1173
1174 void dn_dev_up(struct net_device *dev)
1175 {
1176 struct dn_ifaddr *ifa;
1177 __le16 addr = decnet_address;
1178 int maybe_default = 0;
1179 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1180
1181 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1182 return;
1183
1184 /*
1185 * Need to ensure that loopback device has a dn_db attached to it
1186 * to allow creation of neighbours against it, even though it might
1187 * not have a local address of its own. Might as well do the same for
1188 * all autoconfigured interfaces.
1189 */
1190 if (dn_db == NULL) {
1191 int err;
1192 dn_db = dn_dev_create(dev, &err);
1193 if (dn_db == NULL)
1194 return;
1195 }
1196
1197 if (dev->type == ARPHRD_ETHER) {
1198 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1199 return;
1200 addr = dn_eth2dn(dev->dev_addr);
1201 maybe_default = 1;
1202 }
1203
1204 if (addr == 0)
1205 return;
1206
1207 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1208 return;
1209
1210 ifa->ifa_local = ifa->ifa_address = addr;
1211 ifa->ifa_flags = 0;
1212 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1213 strcpy(ifa->ifa_label, dev->name);
1214
1215 dn_dev_set_ifa(dev, ifa);
1216
1217 /*
1218 * Automagically set the default device to the first automatically
1219 * configured ethernet card in the system.
1220 */
1221 if (maybe_default) {
1222 dev_hold(dev);
1223 if (dn_dev_set_default(dev, 0))
1224 dev_put(dev);
1225 }
1226 }
1227
1228 static void dn_dev_delete(struct net_device *dev)
1229 {
1230 struct dn_dev *dn_db = dev->dn_ptr;
1231
1232 if (dn_db == NULL)
1233 return;
1234
1235 del_timer_sync(&dn_db->timer);
1236 dn_dev_sysctl_unregister(&dn_db->parms);
1237 dn_dev_check_default(dev);
1238 neigh_ifdown(&dn_neigh_table, dev);
1239
1240 if (dn_db->parms.down)
1241 dn_db->parms.down(dev);
1242
1243 dev->dn_ptr = NULL;
1244
1245 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1246 neigh_ifdown(&dn_neigh_table, dev);
1247
1248 if (dn_db->router)
1249 neigh_release(dn_db->router);
1250 if (dn_db->peer)
1251 neigh_release(dn_db->peer);
1252
1253 kfree(dn_db);
1254 }
1255
1256 void dn_dev_down(struct net_device *dev)
1257 {
1258 struct dn_dev *dn_db = dev->dn_ptr;
1259 struct dn_ifaddr *ifa;
1260
1261 if (dn_db == NULL)
1262 return;
1263
1264 while((ifa = dn_db->ifa_list) != NULL) {
1265 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1266 dn_dev_free_ifa(ifa);
1267 }
1268
1269 dn_dev_delete(dev);
1270 }
1271
1272 void dn_dev_init_pkt(struct sk_buff *skb)
1273 {
1274 return;
1275 }
1276
1277 void dn_dev_veri_pkt(struct sk_buff *skb)
1278 {
1279 return;
1280 }
1281
1282 void dn_dev_hello(struct sk_buff *skb)
1283 {
1284 return;
1285 }
1286
1287 void dn_dev_devices_off(void)
1288 {
1289 struct net_device *dev;
1290
1291 rtnl_lock();
1292 for_each_netdev(&init_net, dev)
1293 dn_dev_down(dev);
1294 rtnl_unlock();
1295
1296 }
1297
1298 void dn_dev_devices_on(void)
1299 {
1300 struct net_device *dev;
1301
1302 rtnl_lock();
1303 for_each_netdev(&init_net, dev) {
1304 if (dev->flags & IFF_UP)
1305 dn_dev_up(dev);
1306 }
1307 rtnl_unlock();
1308 }
1309
1310 int register_dnaddr_notifier(struct notifier_block *nb)
1311 {
1312 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1313 }
1314
1315 int unregister_dnaddr_notifier(struct notifier_block *nb)
1316 {
1317 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1318 }
1319
1320 #ifdef CONFIG_PROC_FS
1321 static inline int is_dn_dev(struct net_device *dev)
1322 {
1323 return dev->dn_ptr != NULL;
1324 }
1325
1326 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1327 {
1328 int i;
1329 struct net_device *dev;
1330
1331 read_lock(&dev_base_lock);
1332
1333 if (*pos == 0)
1334 return SEQ_START_TOKEN;
1335
1336 i = 1;
1337 for_each_netdev(&init_net, dev) {
1338 if (!is_dn_dev(dev))
1339 continue;
1340
1341 if (i++ == *pos)
1342 return dev;
1343 }
1344
1345 return NULL;
1346 }
1347
1348 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1349 {
1350 struct net_device *dev;
1351
1352 ++*pos;
1353
1354 dev = (struct net_device *)v;
1355 if (v == SEQ_START_TOKEN)
1356 dev = net_device_entry(&init_net.dev_base_head);
1357
1358 for_each_netdev_continue(&init_net, dev) {
1359 if (!is_dn_dev(dev))
1360 continue;
1361
1362 return dev;
1363 }
1364
1365 return NULL;
1366 }
1367
1368 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1369 {
1370 read_unlock(&dev_base_lock);
1371 }
1372
1373 static char *dn_type2asc(char type)
1374 {
1375 switch(type) {
1376 case DN_DEV_BCAST:
1377 return "B";
1378 case DN_DEV_UCAST:
1379 return "U";
1380 case DN_DEV_MPOINT:
1381 return "M";
1382 }
1383
1384 return "?";
1385 }
1386
1387 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1388 {
1389 if (v == SEQ_START_TOKEN)
1390 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1391 else {
1392 struct net_device *dev = v;
1393 char peer_buf[DN_ASCBUF_LEN];
1394 char router_buf[DN_ASCBUF_LEN];
1395 struct dn_dev *dn_db = dev->dn_ptr;
1396
1397 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1398 " %04hu %03d %02x %-10s %-7s %-7s\n",
1399 dev->name ? dev->name : "???",
1400 dn_type2asc(dn_db->parms.mode),
1401 0, 0,
1402 dn_db->t3, dn_db->parms.t3,
1403 mtu2blksize(dev),
1404 dn_db->parms.priority,
1405 dn_db->parms.state, dn_db->parms.name,
1406 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1407 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1408 }
1409 return 0;
1410 }
1411
1412 static const struct seq_operations dn_dev_seq_ops = {
1413 .start = dn_dev_seq_start,
1414 .next = dn_dev_seq_next,
1415 .stop = dn_dev_seq_stop,
1416 .show = dn_dev_seq_show,
1417 };
1418
1419 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1420 {
1421 return seq_open(file, &dn_dev_seq_ops);
1422 }
1423
1424 static const struct file_operations dn_dev_seq_fops = {
1425 .owner = THIS_MODULE,
1426 .open = dn_dev_seq_open,
1427 .read = seq_read,
1428 .llseek = seq_lseek,
1429 .release = seq_release,
1430 };
1431
1432 #endif /* CONFIG_PROC_FS */
1433
1434 static int addr[2];
1435 module_param_array(addr, int, NULL, 0444);
1436 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1437
1438 void __init dn_dev_init(void)
1439 {
1440 if (addr[0] > 63 || addr[0] < 0) {
1441 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1442 return;
1443 }
1444
1445 if (addr[1] > 1023 || addr[1] < 0) {
1446 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1447 return;
1448 }
1449
1450 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1451
1452 dn_dev_devices_on();
1453
1454 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1455 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1456 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1457
1458 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1459
1460 #ifdef CONFIG_SYSCTL
1461 {
1462 int i;
1463 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1464 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1465 }
1466 #endif /* CONFIG_SYSCTL */
1467 }
1468
1469 void __exit dn_dev_cleanup(void)
1470 {
1471 #ifdef CONFIG_SYSCTL
1472 {
1473 int i;
1474 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1475 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1476 }
1477 #endif /* CONFIG_SYSCTL */
1478
1479 proc_net_remove(&init_net, "decnet_dev");
1480
1481 dn_dev_devices_off();
1482 }
Linux with added FPC-III support