?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / net / decnet / dn_dev.c
bloba48648d8ec14e396c548a8708fa19b633334039e
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 <linux/slab.h>
44 #include <asm/uaccess.h>
45 #include <asm/system.h>
46 #include <net/net_namespace.h>
47 #include <net/neighbour.h>
48 #include <net/dst.h>
49 #include <net/flow.h>
50 #include <net/fib_rules.h>
51 #include <net/netlink.h>
52 #include <net/dn.h>
53 #include <net/dn_dev.h>
54 #include <net/dn_route.h>
55 #include <net/dn_neigh.h>
56 #include <net/dn_fib.h>
57
58 #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
59
60 static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
61 static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
62 static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
63 static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
64
65 extern struct neigh_table dn_neigh_table;
66
67 /*
68 * decnet_address is kept in network order.
69 */
70 __le16 decnet_address = 0;
71
72 static DEFINE_SPINLOCK(dndev_lock);
73 static struct net_device *decnet_default_device;
74 static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
75
76 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
77 static void dn_dev_delete(struct net_device *dev);
78 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
79
80 static int dn_eth_up(struct net_device *);
81 static void dn_eth_down(struct net_device *);
82 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
84
85 static struct dn_dev_parms dn_dev_list[] = {
86 {
87 .type = ARPHRD_ETHER, /* Ethernet */
88 .mode = DN_DEV_BCAST,
89 .state = DN_DEV_S_RU,
90 .t2 = 1,
91 .t3 = 10,
92 .name = "ethernet",
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 .timer3 = dn_send_brd_hello,
105 },
106 {
107 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
108 .mode = DN_DEV_UCAST,
109 .state = DN_DEV_S_DS,
110 .t2 = 1,
111 .t3 = 120,
112 .name = "ddcmp",
113 .timer3 = dn_send_ptp_hello,
114 },
115 {
116 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
117 .mode = DN_DEV_BCAST,
118 .state = DN_DEV_S_RU,
119 .t2 = 1,
120 .t3 = 10,
121 .name = "loopback",
122 .timer3 = dn_send_brd_hello,
123 }
124 };
125
126 #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
127
128 #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
129
130 #ifdef CONFIG_SYSCTL
131
132 static int min_t2[] = { 1 };
133 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
134 static int min_t3[] = { 1 };
135 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
136
137 static int min_priority[1];
138 static int max_priority[] = { 127 }; /* From DECnet spec */
139
140 static int dn_forwarding_proc(ctl_table *, int,
141 void __user *, size_t *, loff_t *);
142 static struct dn_dev_sysctl_table {
143 struct ctl_table_header *sysctl_header;
144 ctl_table dn_dev_vars[5];
145 } dn_dev_sysctl = {
146 NULL,
147 {
148 {
149 .procname = "forwarding",
150 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
151 .maxlen = sizeof(int),
152 .mode = 0644,
153 .proc_handler = dn_forwarding_proc,
154 },
155 {
156 .procname = "priority",
157 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
158 .maxlen = sizeof(int),
159 .mode = 0644,
160 .proc_handler = proc_dointvec_minmax,
161 .extra1 = &min_priority,
162 .extra2 = &max_priority
163 },
164 {
165 .procname = "t2",
166 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
167 .maxlen = sizeof(int),
168 .mode = 0644,
169 .proc_handler = proc_dointvec_minmax,
170 .extra1 = &min_t2,
171 .extra2 = &max_t2
172 },
173 {
174 .procname = "t3",
175 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
176 .maxlen = sizeof(int),
177 .mode = 0644,
178 .proc_handler = proc_dointvec_minmax,
179 .extra1 = &min_t3,
180 .extra2 = &max_t3
181 },
182 {0}
183 },
184 };
185
186 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
187 {
188 struct dn_dev_sysctl_table *t;
189 int i;
190
191 #define DN_CTL_PATH_DEV 3
192
193 struct ctl_path dn_ctl_path[] = {
194 { .procname = "net", },
195 { .procname = "decnet", },
196 { .procname = "conf", },
197 { /* to be set */ },
198 { },
199 };
200
201 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
202 if (t == NULL)
203 return;
204
205 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
206 long offset = (long)t->dn_dev_vars[i].data;
207 t->dn_dev_vars[i].data = ((char *)parms) + offset;
208 }
209
210 if (dev) {
211 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
212 } else {
213 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
214 }
215
216 t->dn_dev_vars[0].extra1 = (void *)dev;
217
218 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
219 if (t->sysctl_header == NULL)
220 kfree(t);
221 else
222 parms->sysctl = t;
223 }
224
225 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
226 {
227 if (parms->sysctl) {
228 struct dn_dev_sysctl_table *t = parms->sysctl;
229 parms->sysctl = NULL;
230 unregister_sysctl_table(t->sysctl_header);
231 kfree(t);
232 }
233 }
234
235 static int dn_forwarding_proc(ctl_table *table, int write,
236 void __user *buffer,
237 size_t *lenp, loff_t *ppos)
238 {
239 #ifdef CONFIG_DECNET_ROUTER
240 struct net_device *dev = table->extra1;
241 struct dn_dev *dn_db;
242 int err;
243 int tmp, old;
244
245 if (table->extra1 == NULL)
246 return -EINVAL;
247
248 dn_db = dev->dn_ptr;
249 old = dn_db->parms.forwarding;
250
251 err = proc_dointvec(table, write, buffer, lenp, ppos);
252
253 if ((err >= 0) && write) {
254 if (dn_db->parms.forwarding < 0)
255 dn_db->parms.forwarding = 0;
256 if (dn_db->parms.forwarding > 2)
257 dn_db->parms.forwarding = 2;
258 /*
259 * What an ugly hack this is... its works, just. It
260 * would be nice if sysctl/proc were just that little
261 * bit more flexible so I don't have to write a special
262 * routine, or suffer hacks like this - SJW
263 */
264 tmp = dn_db->parms.forwarding;
265 dn_db->parms.forwarding = old;
266 if (dn_db->parms.down)
267 dn_db->parms.down(dev);
268 dn_db->parms.forwarding = tmp;
269 if (dn_db->parms.up)
270 dn_db->parms.up(dev);
271 }
272
273 return err;
274 #else
275 return -EINVAL;
276 #endif
277 }
278
279 #else /* CONFIG_SYSCTL */
280 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
281 {
282 }
283 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
284 {
285 }
286
287 #endif /* CONFIG_SYSCTL */
288
289 static inline __u16 mtu2blksize(struct net_device *dev)
290 {
291 u32 blksize = dev->mtu;
292 if (blksize > 0xffff)
293 blksize = 0xffff;
294
295 if (dev->type == ARPHRD_ETHER ||
296 dev->type == ARPHRD_PPP ||
297 dev->type == ARPHRD_IPGRE ||
298 dev->type == ARPHRD_LOOPBACK)
299 blksize -= 2;
300
301 return (__u16)blksize;
302 }
303
304 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
305 {
306 struct dn_ifaddr *ifa;
307
308 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
309
310 return ifa;
311 }
312
313 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
314 {
315 kfree(ifa);
316 }
317
318 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
319 {
320 struct dn_ifaddr *ifa1 = *ifap;
321 unsigned char mac_addr[6];
322 struct net_device *dev = dn_db->dev;
323
324 ASSERT_RTNL();
325
326 *ifap = ifa1->ifa_next;
327
328 if (dn_db->dev->type == ARPHRD_ETHER) {
329 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
330 dn_dn2eth(mac_addr, ifa1->ifa_local);
331 dev_mc_del(dev, mac_addr);
332 }
333 }
334
335 dn_ifaddr_notify(RTM_DELADDR, ifa1);
336 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
337 if (destroy) {
338 dn_dev_free_ifa(ifa1);
339
340 if (dn_db->ifa_list == NULL)
341 dn_dev_delete(dn_db->dev);
342 }
343 }
344
345 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
346 {
347 struct net_device *dev = dn_db->dev;
348 struct dn_ifaddr *ifa1;
349 unsigned char mac_addr[6];
350
351 ASSERT_RTNL();
352
353 /* Check for duplicates */
354 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
355 if (ifa1->ifa_local == ifa->ifa_local)
356 return -EEXIST;
357 }
358
359 if (dev->type == ARPHRD_ETHER) {
360 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
361 dn_dn2eth(mac_addr, ifa->ifa_local);
362 dev_mc_add(dev, mac_addr);
363 }
364 }
365
366 ifa->ifa_next = dn_db->ifa_list;
367 dn_db->ifa_list = ifa;
368
369 dn_ifaddr_notify(RTM_NEWADDR, ifa);
370 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
371
372 return 0;
373 }
374
375 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
376 {
377 struct dn_dev *dn_db = dev->dn_ptr;
378 int rv;
379
380 if (dn_db == NULL) {
381 int err;
382 dn_db = dn_dev_create(dev, &err);
383 if (dn_db == NULL)
384 return err;
385 }
386
387 ifa->ifa_dev = dn_db;
388
389 if (dev->flags & IFF_LOOPBACK)
390 ifa->ifa_scope = RT_SCOPE_HOST;
391
392 rv = dn_dev_insert_ifa(dn_db, ifa);
393 if (rv)
394 dn_dev_free_ifa(ifa);
395 return rv;
396 }
397
398
399 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
400 {
401 char buffer[DN_IFREQ_SIZE];
402 struct ifreq *ifr = (struct ifreq *)buffer;
403 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
404 struct dn_dev *dn_db;
405 struct net_device *dev;
406 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
407 int ret = 0;
408
409 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
410 return -EFAULT;
411 ifr->ifr_name[IFNAMSIZ-1] = 0;
412
413 dev_load(&init_net, ifr->ifr_name);
414
415 switch(cmd) {
416 case SIOCGIFADDR:
417 break;
418 case SIOCSIFADDR:
419 if (!capable(CAP_NET_ADMIN))
420 return -EACCES;
421 if (sdn->sdn_family != AF_DECnet)
422 return -EINVAL;
423 break;
424 default:
425 return -EINVAL;
426 }
427
428 rtnl_lock();
429
430 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
431 ret = -ENODEV;
432 goto done;
433 }
434
435 if ((dn_db = dev->dn_ptr) != NULL) {
436 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
437 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
438 break;
439 }
440
441 if (ifa == NULL && cmd != SIOCSIFADDR) {
442 ret = -EADDRNOTAVAIL;
443 goto done;
444 }
445
446 switch(cmd) {
447 case SIOCGIFADDR:
448 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
449 goto rarok;
450
451 case SIOCSIFADDR:
452 if (!ifa) {
453 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
454 ret = -ENOBUFS;
455 break;
456 }
457 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
458 } else {
459 if (ifa->ifa_local == dn_saddr2dn(sdn))
460 break;
461 dn_dev_del_ifa(dn_db, ifap, 0);
462 }
463
464 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
465
466 ret = dn_dev_set_ifa(dev, ifa);
467 }
468 done:
469 rtnl_unlock();
470
471 return ret;
472 rarok:
473 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
474 ret = -EFAULT;
475 goto done;
476 }
477
478 struct net_device *dn_dev_get_default(void)
479 {
480 struct net_device *dev;
481
482 spin_lock(&dndev_lock);
483 dev = decnet_default_device;
484 if (dev) {
485 if (dev->dn_ptr)
486 dev_hold(dev);
487 else
488 dev = NULL;
489 }
490 spin_unlock(&dndev_lock);
491
492 return dev;
493 }
494
495 int dn_dev_set_default(struct net_device *dev, int force)
496 {
497 struct net_device *old = NULL;
498 int rv = -EBUSY;
499 if (!dev->dn_ptr)
500 return -ENODEV;
501
502 spin_lock(&dndev_lock);
503 if (force || decnet_default_device == NULL) {
504 old = decnet_default_device;
505 decnet_default_device = dev;
506 rv = 0;
507 }
508 spin_unlock(&dndev_lock);
509
510 if (old)
511 dev_put(old);
512 return rv;
513 }
514
515 static void dn_dev_check_default(struct net_device *dev)
516 {
517 spin_lock(&dndev_lock);
518 if (dev == decnet_default_device) {
519 decnet_default_device = NULL;
520 } else {
521 dev = NULL;
522 }
523 spin_unlock(&dndev_lock);
524
525 if (dev)
526 dev_put(dev);
527 }
528
529 /*
530 * Called with RTNL
531 */
532 static struct dn_dev *dn_dev_by_index(int ifindex)
533 {
534 struct net_device *dev;
535 struct dn_dev *dn_dev = NULL;
536
537 dev = __dev_get_by_index(&init_net, ifindex);
538 if (dev)
539 dn_dev = dev->dn_ptr;
540
541 return dn_dev;
542 }
543
544 static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
545 [IFA_ADDRESS] = { .type = NLA_U16 },
546 [IFA_LOCAL] = { .type = NLA_U16 },
547 [IFA_LABEL] = { .type = NLA_STRING,
548 .len = IFNAMSIZ - 1 },
549 };
550
551 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
552 {
553 struct net *net = sock_net(skb->sk);
554 struct nlattr *tb[IFA_MAX+1];
555 struct dn_dev *dn_db;
556 struct ifaddrmsg *ifm;
557 struct dn_ifaddr *ifa, **ifap;
558 int err = -EINVAL;
559
560 if (!net_eq(net, &init_net))
561 goto errout;
562
563 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
564 if (err < 0)
565 goto errout;
566
567 err = -ENODEV;
568 ifm = nlmsg_data(nlh);
569 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
570 goto errout;
571
572 err = -EADDRNOTAVAIL;
573 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
574 if (tb[IFA_LOCAL] &&
575 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
576 continue;
577
578 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
579 continue;
580
581 dn_dev_del_ifa(dn_db, ifap, 1);
582 return 0;
583 }
584
585 errout:
586 return err;
587 }
588
589 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
590 {
591 struct net *net = sock_net(skb->sk);
592 struct nlattr *tb[IFA_MAX+1];
593 struct net_device *dev;
594 struct dn_dev *dn_db;
595 struct ifaddrmsg *ifm;
596 struct dn_ifaddr *ifa;
597 int err;
598
599 if (!net_eq(net, &init_net))
600 return -EINVAL;
601
602 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
603 if (err < 0)
604 return err;
605
606 if (tb[IFA_LOCAL] == NULL)
607 return -EINVAL;
608
609 ifm = nlmsg_data(nlh);
610 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
611 return -ENODEV;
612
613 if ((dn_db = dev->dn_ptr) == NULL) {
614 dn_db = dn_dev_create(dev, &err);
615 if (!dn_db)
616 return err;
617 }
618
619 if ((ifa = dn_dev_alloc_ifa()) == NULL)
620 return -ENOBUFS;
621
622 if (tb[IFA_ADDRESS] == NULL)
623 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
624
625 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
626 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
627 ifa->ifa_flags = ifm->ifa_flags;
628 ifa->ifa_scope = ifm->ifa_scope;
629 ifa->ifa_dev = dn_db;
630
631 if (tb[IFA_LABEL])
632 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
633 else
634 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
635
636 err = dn_dev_insert_ifa(dn_db, ifa);
637 if (err)
638 dn_dev_free_ifa(ifa);
639
640 return err;
641 }
642
643 static inline size_t dn_ifaddr_nlmsg_size(void)
644 {
645 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
646 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
647 + nla_total_size(2) /* IFA_ADDRESS */
648 + nla_total_size(2); /* IFA_LOCAL */
649 }
650
651 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
652 u32 pid, u32 seq, int event, unsigned int flags)
653 {
654 struct ifaddrmsg *ifm;
655 struct nlmsghdr *nlh;
656
657 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
658 if (nlh == NULL)
659 return -EMSGSIZE;
660
661 ifm = nlmsg_data(nlh);
662 ifm->ifa_family = AF_DECnet;
663 ifm->ifa_prefixlen = 16;
664 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
665 ifm->ifa_scope = ifa->ifa_scope;
666 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
667
668 if (ifa->ifa_address)
669 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
670 if (ifa->ifa_local)
671 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
672 if (ifa->ifa_label[0])
673 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
674
675 return nlmsg_end(skb, nlh);
676
677 nla_put_failure:
678 nlmsg_cancel(skb, nlh);
679 return -EMSGSIZE;
680 }
681
682 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
683 {
684 struct sk_buff *skb;
685 int err = -ENOBUFS;
686
687 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
688 if (skb == NULL)
689 goto errout;
690
691 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
692 if (err < 0) {
693 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
694 WARN_ON(err == -EMSGSIZE);
695 kfree_skb(skb);
696 goto errout;
697 }
698 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
699 return;
700 errout:
701 if (err < 0)
702 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
703 }
704
705 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
706 {
707 struct net *net = sock_net(skb->sk);
708 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
709 struct net_device *dev;
710 struct dn_dev *dn_db;
711 struct dn_ifaddr *ifa;
712
713 if (!net_eq(net, &init_net))
714 return 0;
715
716 skip_ndevs = cb->args[0];
717 skip_naddr = cb->args[1];
718
719 idx = 0;
720 for_each_netdev(&init_net, dev) {
721 if (idx < skip_ndevs)
722 goto cont;
723 else if (idx > skip_ndevs) {
724 /* Only skip over addresses for first dev dumped
725 * in this iteration (idx == skip_ndevs) */
726 skip_naddr = 0;
727 }
728
729 if ((dn_db = dev->dn_ptr) == NULL)
730 goto cont;
731
732 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
733 ifa = ifa->ifa_next, dn_idx++) {
734 if (dn_idx < skip_naddr)
735 continue;
736
737 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
738 cb->nlh->nlmsg_seq, RTM_NEWADDR,
739 NLM_F_MULTI) < 0)
740 goto done;
741 }
742 cont:
743 idx++;
744 }
745 done:
746 cb->args[0] = idx;
747 cb->args[1] = dn_idx;
748
749 return skb->len;
750 }
751
752 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
753 {
754 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
755 struct dn_ifaddr *ifa;
756 int rv = -ENODEV;
757
758 if (dn_db == NULL)
759 goto out;
760
761 rtnl_lock();
762 ifa = dn_db->ifa_list;
763 if (ifa != NULL) {
764 *addr = ifa->ifa_local;
765 rv = 0;
766 }
767 rtnl_unlock();
768 out:
769 return rv;
770 }
771
772 /*
773 * Find a default address to bind to.
774 *
775 * This is one of those areas where the initial VMS concepts don't really
776 * map onto the Linux concepts, and since we introduced multiple addresses
777 * per interface we have to cope with slightly odd ways of finding out what
778 * "our address" really is. Mostly it's not a problem; for this we just guess
779 * a sensible default. Eventually the routing code will take care of all the
780 * nasties for us I hope.
781 */
782 int dn_dev_bind_default(__le16 *addr)
783 {
784 struct net_device *dev;
785 int rv;
786 dev = dn_dev_get_default();
787 last_chance:
788 if (dev) {
789 rv = dn_dev_get_first(dev, addr);
790 dev_put(dev);
791 if (rv == 0 || dev == init_net.loopback_dev)
792 return rv;
793 }
794 dev = init_net.loopback_dev;
795 dev_hold(dev);
796 goto last_chance;
797 }
798
799 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
800 {
801 struct endnode_hello_message *msg;
802 struct sk_buff *skb = NULL;
803 __le16 *pktlen;
804 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
805
806 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
807 return;
808
809 skb->dev = dev;
810
811 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
812
813 msg->msgflg = 0x0D;
814 memcpy(msg->tiver, dn_eco_version, 3);
815 dn_dn2eth(msg->id, ifa->ifa_local);
816 msg->iinfo = DN_RT_INFO_ENDN;
817 msg->blksize = cpu_to_le16(mtu2blksize(dev));
818 msg->area = 0x00;
819 memset(msg->seed, 0, 8);
820 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
821
822 if (dn_db->router) {
823 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
824 dn_dn2eth(msg->neighbor, dn->addr);
825 }
826
827 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
828 msg->mpd = 0x00;
829 msg->datalen = 0x02;
830 memset(msg->data, 0xAA, 2);
831
832 pktlen = (__le16 *)skb_push(skb,2);
833 *pktlen = cpu_to_le16(skb->len - 2);
834
835 skb_reset_network_header(skb);
836
837 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
838 }
839
840
841 #define DRDELAY (5 * HZ)
842
843 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
844 {
845 /* First check time since device went up */
846 if ((jiffies - dn_db->uptime) < DRDELAY)
847 return 0;
848
849 /* If there is no router, then yes... */
850 if (!dn_db->router)
851 return 1;
852
853 /* otherwise only if we have a higher priority or.. */
854 if (dn->priority < dn_db->parms.priority)
855 return 1;
856
857 /* if we have equal priority and a higher node number */
858 if (dn->priority != dn_db->parms.priority)
859 return 0;
860
861 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
862 return 1;
863
864 return 0;
865 }
866
867 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
868 {
869 int n;
870 struct dn_dev *dn_db = dev->dn_ptr;
871 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
872 struct sk_buff *skb;
873 size_t size;
874 unsigned char *ptr;
875 unsigned char *i1, *i2;
876 __le16 *pktlen;
877 char *src;
878
879 if (mtu2blksize(dev) < (26 + 7))
880 return;
881
882 n = mtu2blksize(dev) - 26;
883 n /= 7;
884
885 if (n > 32)
886 n = 32;
887
888 size = 2 + 26 + 7 * n;
889
890 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
891 return;
892
893 skb->dev = dev;
894 ptr = skb_put(skb, size);
895
896 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
897 *ptr++ = 2; /* ECO */
898 *ptr++ = 0;
899 *ptr++ = 0;
900 dn_dn2eth(ptr, ifa->ifa_local);
901 src = ptr;
902 ptr += ETH_ALEN;
903 *ptr++ = dn_db->parms.forwarding == 1 ?
904 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
905 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
906 ptr += 2;
907 *ptr++ = dn_db->parms.priority; /* Priority */
908 *ptr++ = 0; /* Area: Reserved */
909 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
910 ptr += 2;
911 *ptr++ = 0; /* MPD: Reserved */
912 i1 = ptr++;
913 memset(ptr, 0, 7); /* Name: Reserved */
914 ptr += 7;
915 i2 = ptr++;
916
917 n = dn_neigh_elist(dev, ptr, n);
918
919 *i2 = 7 * n;
920 *i1 = 8 + *i2;
921
922 skb_trim(skb, (27 + *i2));
923
924 pktlen = (__le16 *)skb_push(skb, 2);
925 *pktlen = cpu_to_le16(skb->len - 2);
926
927 skb_reset_network_header(skb);
928
929 if (dn_am_i_a_router(dn, dn_db, ifa)) {
930 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
931 if (skb2) {
932 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
933 }
934 }
935
936 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
937 }
938
939 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
940 {
941 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
942
943 if (dn_db->parms.forwarding == 0)
944 dn_send_endnode_hello(dev, ifa);
945 else
946 dn_send_router_hello(dev, ifa);
947 }
948
949 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
950 {
951 int tdlen = 16;
952 int size = dev->hard_header_len + 2 + 4 + tdlen;
953 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
954 int i;
955 unsigned char *ptr;
956 char src[ETH_ALEN];
957
958 if (skb == NULL)
959 return ;
960
961 skb->dev = dev;
962 skb_push(skb, dev->hard_header_len);
963 ptr = skb_put(skb, 2 + 4 + tdlen);
964
965 *ptr++ = DN_RT_PKT_HELO;
966 *((__le16 *)ptr) = ifa->ifa_local;
967 ptr += 2;
968 *ptr++ = tdlen;
969
970 for(i = 0; i < tdlen; i++)
971 *ptr++ = 0252;
972
973 dn_dn2eth(src, ifa->ifa_local);
974 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
975 }
976
977 static int dn_eth_up(struct net_device *dev)
978 {
979 struct dn_dev *dn_db = dev->dn_ptr;
980
981 if (dn_db->parms.forwarding == 0)
982 dev_mc_add(dev, dn_rt_all_end_mcast);
983 else
984 dev_mc_add(dev, dn_rt_all_rt_mcast);
985
986 dn_db->use_long = 1;
987
988 return 0;
989 }
990
991 static void dn_eth_down(struct net_device *dev)
992 {
993 struct dn_dev *dn_db = dev->dn_ptr;
994
995 if (dn_db->parms.forwarding == 0)
996 dev_mc_del(dev, dn_rt_all_end_mcast);
997 else
998 dev_mc_del(dev, dn_rt_all_rt_mcast);
999 }
1000
1001 static void dn_dev_set_timer(struct net_device *dev);
1002
1003 static void dn_dev_timer_func(unsigned long arg)
1004 {
1005 struct net_device *dev = (struct net_device *)arg;
1006 struct dn_dev *dn_db = dev->dn_ptr;
1007 struct dn_ifaddr *ifa;
1008
1009 if (dn_db->t3 <= dn_db->parms.t2) {
1010 if (dn_db->parms.timer3) {
1011 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1012 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1013 dn_db->parms.timer3(dev, ifa);
1014 }
1015 }
1016 dn_db->t3 = dn_db->parms.t3;
1017 } else {
1018 dn_db->t3 -= dn_db->parms.t2;
1019 }
1020
1021 dn_dev_set_timer(dev);
1022 }
1023
1024 static void dn_dev_set_timer(struct net_device *dev)
1025 {
1026 struct dn_dev *dn_db = dev->dn_ptr;
1027
1028 if (dn_db->parms.t2 > dn_db->parms.t3)
1029 dn_db->parms.t2 = dn_db->parms.t3;
1030
1031 dn_db->timer.data = (unsigned long)dev;
1032 dn_db->timer.function = dn_dev_timer_func;
1033 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1034
1035 add_timer(&dn_db->timer);
1036 }
1037
1038 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1039 {
1040 int i;
1041 struct dn_dev_parms *p = dn_dev_list;
1042 struct dn_dev *dn_db;
1043
1044 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1045 if (p->type == dev->type)
1046 break;
1047 }
1048
1049 *err = -ENODEV;
1050 if (i == DN_DEV_LIST_SIZE)
1051 return NULL;
1052
1053 *err = -ENOBUFS;
1054 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1055 return NULL;
1056
1057 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1058 smp_wmb();
1059 dev->dn_ptr = dn_db;
1060 dn_db->dev = dev;
1061 init_timer(&dn_db->timer);
1062
1063 dn_db->uptime = jiffies;
1064
1065 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1066 if (!dn_db->neigh_parms) {
1067 dev->dn_ptr = NULL;
1068 kfree(dn_db);
1069 return NULL;
1070 }
1071
1072 if (dn_db->parms.up) {
1073 if (dn_db->parms.up(dev) < 0) {
1074 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1075 dev->dn_ptr = NULL;
1076 kfree(dn_db);
1077 return NULL;
1078 }
1079 }
1080
1081 dn_dev_sysctl_register(dev, &dn_db->parms);
1082
1083 dn_dev_set_timer(dev);
1084
1085 *err = 0;
1086 return dn_db;
1087 }
1088
1089
1090
1091 void dn_dev_up(struct net_device *dev)
1092 {
1093 struct dn_ifaddr *ifa;
1094 __le16 addr = decnet_address;
1095 int maybe_default = 0;
1096 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1097
1098 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1099 return;
1100
1101 /*
1102 * Need to ensure that loopback device has a dn_db attached to it
1103 * to allow creation of neighbours against it, even though it might
1104 * not have a local address of its own. Might as well do the same for
1105 * all autoconfigured interfaces.
1106 */
1107 if (dn_db == NULL) {
1108 int err;
1109 dn_db = dn_dev_create(dev, &err);
1110 if (dn_db == NULL)
1111 return;
1112 }
1113
1114 if (dev->type == ARPHRD_ETHER) {
1115 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1116 return;
1117 addr = dn_eth2dn(dev->dev_addr);
1118 maybe_default = 1;
1119 }
1120
1121 if (addr == 0)
1122 return;
1123
1124 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1125 return;
1126
1127 ifa->ifa_local = ifa->ifa_address = addr;
1128 ifa->ifa_flags = 0;
1129 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1130 strcpy(ifa->ifa_label, dev->name);
1131
1132 dn_dev_set_ifa(dev, ifa);
1133
1134 /*
1135 * Automagically set the default device to the first automatically
1136 * configured ethernet card in the system.
1137 */
1138 if (maybe_default) {
1139 dev_hold(dev);
1140 if (dn_dev_set_default(dev, 0))
1141 dev_put(dev);
1142 }
1143 }
1144
1145 static void dn_dev_delete(struct net_device *dev)
1146 {
1147 struct dn_dev *dn_db = dev->dn_ptr;
1148
1149 if (dn_db == NULL)
1150 return;
1151
1152 del_timer_sync(&dn_db->timer);
1153 dn_dev_sysctl_unregister(&dn_db->parms);
1154 dn_dev_check_default(dev);
1155 neigh_ifdown(&dn_neigh_table, dev);
1156
1157 if (dn_db->parms.down)
1158 dn_db->parms.down(dev);
1159
1160 dev->dn_ptr = NULL;
1161
1162 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1163 neigh_ifdown(&dn_neigh_table, dev);
1164
1165 if (dn_db->router)
1166 neigh_release(dn_db->router);
1167 if (dn_db->peer)
1168 neigh_release(dn_db->peer);
1169
1170 kfree(dn_db);
1171 }
1172
1173 void dn_dev_down(struct net_device *dev)
1174 {
1175 struct dn_dev *dn_db = dev->dn_ptr;
1176 struct dn_ifaddr *ifa;
1177
1178 if (dn_db == NULL)
1179 return;
1180
1181 while((ifa = dn_db->ifa_list) != NULL) {
1182 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1183 dn_dev_free_ifa(ifa);
1184 }
1185
1186 dn_dev_delete(dev);
1187 }
1188
1189 void dn_dev_init_pkt(struct sk_buff *skb)
1190 {
1191 }
1192
1193 void dn_dev_veri_pkt(struct sk_buff *skb)
1194 {
1195 }
1196
1197 void dn_dev_hello(struct sk_buff *skb)
1198 {
1199 }
1200
1201 void dn_dev_devices_off(void)
1202 {
1203 struct net_device *dev;
1204
1205 rtnl_lock();
1206 for_each_netdev(&init_net, dev)
1207 dn_dev_down(dev);
1208 rtnl_unlock();
1209
1210 }
1211
1212 void dn_dev_devices_on(void)
1213 {
1214 struct net_device *dev;
1215
1216 rtnl_lock();
1217 for_each_netdev(&init_net, dev) {
1218 if (dev->flags & IFF_UP)
1219 dn_dev_up(dev);
1220 }
1221 rtnl_unlock();
1222 }
1223
1224 int register_dnaddr_notifier(struct notifier_block *nb)
1225 {
1226 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1227 }
1228
1229 int unregister_dnaddr_notifier(struct notifier_block *nb)
1230 {
1231 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1232 }
1233
1234 #ifdef CONFIG_PROC_FS
1235 static inline int is_dn_dev(struct net_device *dev)
1236 {
1237 return dev->dn_ptr != NULL;
1238 }
1239
1240 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1241 __acquires(rcu)
1242 {
1243 int i;
1244 struct net_device *dev;
1245
1246 rcu_read_lock();
1247
1248 if (*pos == 0)
1249 return SEQ_START_TOKEN;
1250
1251 i = 1;
1252 for_each_netdev_rcu(&init_net, dev) {
1253 if (!is_dn_dev(dev))
1254 continue;
1255
1256 if (i++ == *pos)
1257 return dev;
1258 }
1259
1260 return NULL;
1261 }
1262
1263 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1264 {
1265 struct net_device *dev;
1266
1267 ++*pos;
1268
1269 dev = (struct net_device *)v;
1270 if (v == SEQ_START_TOKEN)
1271 dev = net_device_entry(&init_net.dev_base_head);
1272
1273 for_each_netdev_continue_rcu(&init_net, dev) {
1274 if (!is_dn_dev(dev))
1275 continue;
1276
1277 return dev;
1278 }
1279
1280 return NULL;
1281 }
1282
1283 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1284 __releases(rcu)
1285 {
1286 rcu_read_unlock();
1287 }
1288
1289 static char *dn_type2asc(char type)
1290 {
1291 switch(type) {
1292 case DN_DEV_BCAST:
1293 return "B";
1294 case DN_DEV_UCAST:
1295 return "U";
1296 case DN_DEV_MPOINT:
1297 return "M";
1298 }
1299
1300 return "?";
1301 }
1302
1303 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1304 {
1305 if (v == SEQ_START_TOKEN)
1306 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1307 else {
1308 struct net_device *dev = v;
1309 char peer_buf[DN_ASCBUF_LEN];
1310 char router_buf[DN_ASCBUF_LEN];
1311 struct dn_dev *dn_db = dev->dn_ptr;
1312
1313 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1314 " %04hu %03d %02x %-10s %-7s %-7s\n",
1315 dev->name ? dev->name : "???",
1316 dn_type2asc(dn_db->parms.mode),
1317 0, 0,
1318 dn_db->t3, dn_db->parms.t3,
1319 mtu2blksize(dev),
1320 dn_db->parms.priority,
1321 dn_db->parms.state, dn_db->parms.name,
1322 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1323 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1324 }
1325 return 0;
1326 }
1327
1328 static const struct seq_operations dn_dev_seq_ops = {
1329 .start = dn_dev_seq_start,
1330 .next = dn_dev_seq_next,
1331 .stop = dn_dev_seq_stop,
1332 .show = dn_dev_seq_show,
1333 };
1334
1335 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1336 {
1337 return seq_open(file, &dn_dev_seq_ops);
1338 }
1339
1340 static const struct file_operations dn_dev_seq_fops = {
1341 .owner = THIS_MODULE,
1342 .open = dn_dev_seq_open,
1343 .read = seq_read,
1344 .llseek = seq_lseek,
1345 .release = seq_release,
1346 };
1347
1348 #endif /* CONFIG_PROC_FS */
1349
1350 static int addr[2];
1351 module_param_array(addr, int, NULL, 0444);
1352 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1353
1354 void __init dn_dev_init(void)
1355 {
1356 if (addr[0] > 63 || addr[0] < 0) {
1357 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1358 return;
1359 }
1360
1361 if (addr[1] > 1023 || addr[1] < 0) {
1362 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1363 return;
1364 }
1365
1366 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1367
1368 dn_dev_devices_on();
1369
1370 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1371 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1372 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1373
1374 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1375
1376 #ifdef CONFIG_SYSCTL
1377 {
1378 int i;
1379 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1380 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1381 }
1382 #endif /* CONFIG_SYSCTL */
1383 }
1384
1385 void __exit dn_dev_cleanup(void)
1386 {
1387 #ifdef CONFIG_SYSCTL
1388 {
1389 int i;
1390 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1391 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1392 }
1393 #endif /* CONFIG_SYSCTL */
1394
1395 proc_net_remove(&init_net, "decnet_dev");
1396
1397 dn_dev_devices_off();
1398 }
Tomato firmware and modifications.