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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / decnet / dn_dev.c
blob4c409b46aa35c0bb13bc0b99cec4f43dd2da0690
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 #if 0
107 {
108 .type = ARPHRD_X25, /* Bog standard X.25 */
109 .mode = DN_DEV_UCAST,
110 .state = DN_DEV_S_DS,
111 .t2 = 1,
112 .t3 = 120,
113 .name = "x25",
114 .timer3 = dn_send_ptp_hello,
115 },
116 #endif
117 #if 0
118 {
119 .type = ARPHRD_PPP, /* DECnet over PPP */
120 .mode = DN_DEV_BCAST,
121 .state = DN_DEV_S_RU,
122 .t2 = 1,
123 .t3 = 10,
124 .name = "ppp",
125 .timer3 = dn_send_brd_hello,
126 },
127 #endif
128 {
129 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
130 .mode = DN_DEV_UCAST,
131 .state = DN_DEV_S_DS,
132 .t2 = 1,
133 .t3 = 120,
134 .name = "ddcmp",
135 .timer3 = dn_send_ptp_hello,
136 },
137 {
138 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
139 .mode = DN_DEV_BCAST,
140 .state = DN_DEV_S_RU,
141 .t2 = 1,
142 .t3 = 10,
143 .name = "loopback",
144 .timer3 = dn_send_brd_hello,
145 }
146 };
147
148 #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
149
150 #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
151
152 #ifdef CONFIG_SYSCTL
153
154 static int min_t2[] = { 1 };
155 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
156 static int min_t3[] = { 1 };
157 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
158
159 static int min_priority[1];
160 static int max_priority[] = { 127 }; /* From DECnet spec */
161
162 static int dn_forwarding_proc(ctl_table *, int,
163 void __user *, size_t *, loff_t *);
164 static struct dn_dev_sysctl_table {
165 struct ctl_table_header *sysctl_header;
166 ctl_table dn_dev_vars[5];
167 } dn_dev_sysctl = {
168 NULL,
169 {
170 {
171 .procname = "forwarding",
172 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
173 .maxlen = sizeof(int),
174 .mode = 0644,
175 .proc_handler = dn_forwarding_proc,
176 },
177 {
178 .procname = "priority",
179 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
180 .maxlen = sizeof(int),
181 .mode = 0644,
182 .proc_handler = proc_dointvec_minmax,
183 .extra1 = &min_priority,
184 .extra2 = &max_priority
185 },
186 {
187 .procname = "t2",
188 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
189 .maxlen = sizeof(int),
190 .mode = 0644,
191 .proc_handler = proc_dointvec_minmax,
192 .extra1 = &min_t2,
193 .extra2 = &max_t2
194 },
195 {
196 .procname = "t3",
197 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
198 .maxlen = sizeof(int),
199 .mode = 0644,
200 .proc_handler = proc_dointvec_minmax,
201 .extra1 = &min_t3,
202 .extra2 = &max_t3
203 },
204 {0}
205 },
206 };
207
208 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
209 {
210 struct dn_dev_sysctl_table *t;
211 int i;
212
213 #define DN_CTL_PATH_DEV 3
214
215 struct ctl_path dn_ctl_path[] = {
216 { .procname = "net", },
217 { .procname = "decnet", },
218 { .procname = "conf", },
219 { /* to be set */ },
220 { },
221 };
222
223 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
224 if (t == NULL)
225 return;
226
227 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
228 long offset = (long)t->dn_dev_vars[i].data;
229 t->dn_dev_vars[i].data = ((char *)parms) + offset;
230 }
231
232 if (dev) {
233 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
234 } else {
235 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
236 }
237
238 t->dn_dev_vars[0].extra1 = (void *)dev;
239
240 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
241 if (t->sysctl_header == NULL)
242 kfree(t);
243 else
244 parms->sysctl = t;
245 }
246
247 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
248 {
249 if (parms->sysctl) {
250 struct dn_dev_sysctl_table *t = parms->sysctl;
251 parms->sysctl = NULL;
252 unregister_sysctl_table(t->sysctl_header);
253 kfree(t);
254 }
255 }
256
257 static int dn_forwarding_proc(ctl_table *table, int write,
258 void __user *buffer,
259 size_t *lenp, loff_t *ppos)
260 {
261 #ifdef CONFIG_DECNET_ROUTER
262 struct net_device *dev = table->extra1;
263 struct dn_dev *dn_db;
264 int err;
265 int tmp, old;
266
267 if (table->extra1 == NULL)
268 return -EINVAL;
269
270 dn_db = dev->dn_ptr;
271 old = dn_db->parms.forwarding;
272
273 err = proc_dointvec(table, write, buffer, lenp, ppos);
274
275 if ((err >= 0) && write) {
276 if (dn_db->parms.forwarding < 0)
277 dn_db->parms.forwarding = 0;
278 if (dn_db->parms.forwarding > 2)
279 dn_db->parms.forwarding = 2;
280 /*
281 * What an ugly hack this is... its works, just. It
282 * would be nice if sysctl/proc were just that little
283 * bit more flexible so I don't have to write a special
284 * routine, or suffer hacks like this - SJW
285 */
286 tmp = dn_db->parms.forwarding;
287 dn_db->parms.forwarding = old;
288 if (dn_db->parms.down)
289 dn_db->parms.down(dev);
290 dn_db->parms.forwarding = tmp;
291 if (dn_db->parms.up)
292 dn_db->parms.up(dev);
293 }
294
295 return err;
296 #else
297 return -EINVAL;
298 #endif
299 }
300
301 #else /* CONFIG_SYSCTL */
302 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
303 {
304 }
305 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
306 {
307 }
308
309 #endif /* CONFIG_SYSCTL */
310
311 static inline __u16 mtu2blksize(struct net_device *dev)
312 {
313 u32 blksize = dev->mtu;
314 if (blksize > 0xffff)
315 blksize = 0xffff;
316
317 if (dev->type == ARPHRD_ETHER ||
318 dev->type == ARPHRD_PPP ||
319 dev->type == ARPHRD_IPGRE ||
320 dev->type == ARPHRD_LOOPBACK)
321 blksize -= 2;
322
323 return (__u16)blksize;
324 }
325
326 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
327 {
328 struct dn_ifaddr *ifa;
329
330 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
331
332 return ifa;
333 }
334
335 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
336 {
337 kfree(ifa);
338 }
339
340 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
341 {
342 struct dn_ifaddr *ifa1 = *ifap;
343 unsigned char mac_addr[6];
344 struct net_device *dev = dn_db->dev;
345
346 ASSERT_RTNL();
347
348 *ifap = ifa1->ifa_next;
349
350 if (dn_db->dev->type == ARPHRD_ETHER) {
351 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
352 dn_dn2eth(mac_addr, ifa1->ifa_local);
353 dev_mc_del(dev, mac_addr);
354 }
355 }
356
357 dn_ifaddr_notify(RTM_DELADDR, ifa1);
358 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
359 if (destroy) {
360 dn_dev_free_ifa(ifa1);
361
362 if (dn_db->ifa_list == NULL)
363 dn_dev_delete(dn_db->dev);
364 }
365 }
366
367 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
368 {
369 struct net_device *dev = dn_db->dev;
370 struct dn_ifaddr *ifa1;
371 unsigned char mac_addr[6];
372
373 ASSERT_RTNL();
374
375 /* Check for duplicates */
376 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
377 if (ifa1->ifa_local == ifa->ifa_local)
378 return -EEXIST;
379 }
380
381 if (dev->type == ARPHRD_ETHER) {
382 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
383 dn_dn2eth(mac_addr, ifa->ifa_local);
384 dev_mc_add(dev, mac_addr);
385 }
386 }
387
388 ifa->ifa_next = dn_db->ifa_list;
389 dn_db->ifa_list = ifa;
390
391 dn_ifaddr_notify(RTM_NEWADDR, ifa);
392 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
393
394 return 0;
395 }
396
397 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
398 {
399 struct dn_dev *dn_db = dev->dn_ptr;
400 int rv;
401
402 if (dn_db == NULL) {
403 int err;
404 dn_db = dn_dev_create(dev, &err);
405 if (dn_db == NULL)
406 return err;
407 }
408
409 ifa->ifa_dev = dn_db;
410
411 if (dev->flags & IFF_LOOPBACK)
412 ifa->ifa_scope = RT_SCOPE_HOST;
413
414 rv = dn_dev_insert_ifa(dn_db, ifa);
415 if (rv)
416 dn_dev_free_ifa(ifa);
417 return rv;
418 }
419
420
421 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
422 {
423 char buffer[DN_IFREQ_SIZE];
424 struct ifreq *ifr = (struct ifreq *)buffer;
425 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
426 struct dn_dev *dn_db;
427 struct net_device *dev;
428 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
429 int ret = 0;
430
431 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
432 return -EFAULT;
433 ifr->ifr_name[IFNAMSIZ-1] = 0;
434
435 dev_load(&init_net, ifr->ifr_name);
436
437 switch(cmd) {
438 case SIOCGIFADDR:
439 break;
440 case SIOCSIFADDR:
441 if (!capable(CAP_NET_ADMIN))
442 return -EACCES;
443 if (sdn->sdn_family != AF_DECnet)
444 return -EINVAL;
445 break;
446 default:
447 return -EINVAL;
448 }
449
450 rtnl_lock();
451
452 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
453 ret = -ENODEV;
454 goto done;
455 }
456
457 if ((dn_db = dev->dn_ptr) != NULL) {
458 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
459 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
460 break;
461 }
462
463 if (ifa == NULL && cmd != SIOCSIFADDR) {
464 ret = -EADDRNOTAVAIL;
465 goto done;
466 }
467
468 switch(cmd) {
469 case SIOCGIFADDR:
470 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
471 goto rarok;
472
473 case SIOCSIFADDR:
474 if (!ifa) {
475 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
476 ret = -ENOBUFS;
477 break;
478 }
479 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
480 } else {
481 if (ifa->ifa_local == dn_saddr2dn(sdn))
482 break;
483 dn_dev_del_ifa(dn_db, ifap, 0);
484 }
485
486 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
487
488 ret = dn_dev_set_ifa(dev, ifa);
489 }
490 done:
491 rtnl_unlock();
492
493 return ret;
494 rarok:
495 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
496 ret = -EFAULT;
497 goto done;
498 }
499
500 struct net_device *dn_dev_get_default(void)
501 {
502 struct net_device *dev;
503
504 spin_lock(&dndev_lock);
505 dev = decnet_default_device;
506 if (dev) {
507 if (dev->dn_ptr)
508 dev_hold(dev);
509 else
510 dev = NULL;
511 }
512 spin_unlock(&dndev_lock);
513
514 return dev;
515 }
516
517 int dn_dev_set_default(struct net_device *dev, int force)
518 {
519 struct net_device *old = NULL;
520 int rv = -EBUSY;
521 if (!dev->dn_ptr)
522 return -ENODEV;
523
524 spin_lock(&dndev_lock);
525 if (force || decnet_default_device == NULL) {
526 old = decnet_default_device;
527 decnet_default_device = dev;
528 rv = 0;
529 }
530 spin_unlock(&dndev_lock);
531
532 if (old)
533 dev_put(old);
534 return rv;
535 }
536
537 static void dn_dev_check_default(struct net_device *dev)
538 {
539 spin_lock(&dndev_lock);
540 if (dev == decnet_default_device) {
541 decnet_default_device = NULL;
542 } else {
543 dev = NULL;
544 }
545 spin_unlock(&dndev_lock);
546
547 if (dev)
548 dev_put(dev);
549 }
550
551 /*
552 * Called with RTNL
553 */
554 static struct dn_dev *dn_dev_by_index(int ifindex)
555 {
556 struct net_device *dev;
557 struct dn_dev *dn_dev = NULL;
558
559 dev = __dev_get_by_index(&init_net, ifindex);
560 if (dev)
561 dn_dev = dev->dn_ptr;
562
563 return dn_dev;
564 }
565
566 static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
567 [IFA_ADDRESS] = { .type = NLA_U16 },
568 [IFA_LOCAL] = { .type = NLA_U16 },
569 [IFA_LABEL] = { .type = NLA_STRING,
570 .len = IFNAMSIZ - 1 },
571 };
572
573 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
574 {
575 struct net *net = sock_net(skb->sk);
576 struct nlattr *tb[IFA_MAX+1];
577 struct dn_dev *dn_db;
578 struct ifaddrmsg *ifm;
579 struct dn_ifaddr *ifa, **ifap;
580 int err = -EINVAL;
581
582 if (!net_eq(net, &init_net))
583 goto errout;
584
585 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
586 if (err < 0)
587 goto errout;
588
589 err = -ENODEV;
590 ifm = nlmsg_data(nlh);
591 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
592 goto errout;
593
594 err = -EADDRNOTAVAIL;
595 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
596 if (tb[IFA_LOCAL] &&
597 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
598 continue;
599
600 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
601 continue;
602
603 dn_dev_del_ifa(dn_db, ifap, 1);
604 return 0;
605 }
606
607 errout:
608 return err;
609 }
610
611 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
612 {
613 struct net *net = sock_net(skb->sk);
614 struct nlattr *tb[IFA_MAX+1];
615 struct net_device *dev;
616 struct dn_dev *dn_db;
617 struct ifaddrmsg *ifm;
618 struct dn_ifaddr *ifa;
619 int err;
620
621 if (!net_eq(net, &init_net))
622 return -EINVAL;
623
624 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
625 if (err < 0)
626 return err;
627
628 if (tb[IFA_LOCAL] == NULL)
629 return -EINVAL;
630
631 ifm = nlmsg_data(nlh);
632 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
633 return -ENODEV;
634
635 if ((dn_db = dev->dn_ptr) == NULL) {
636 dn_db = dn_dev_create(dev, &err);
637 if (!dn_db)
638 return err;
639 }
640
641 if ((ifa = dn_dev_alloc_ifa()) == NULL)
642 return -ENOBUFS;
643
644 if (tb[IFA_ADDRESS] == NULL)
645 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
646
647 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
648 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
649 ifa->ifa_flags = ifm->ifa_flags;
650 ifa->ifa_scope = ifm->ifa_scope;
651 ifa->ifa_dev = dn_db;
652
653 if (tb[IFA_LABEL])
654 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
655 else
656 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
657
658 err = dn_dev_insert_ifa(dn_db, ifa);
659 if (err)
660 dn_dev_free_ifa(ifa);
661
662 return err;
663 }
664
665 static inline size_t dn_ifaddr_nlmsg_size(void)
666 {
667 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
668 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
669 + nla_total_size(2) /* IFA_ADDRESS */
670 + nla_total_size(2); /* IFA_LOCAL */
671 }
672
673 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
674 u32 pid, u32 seq, int event, unsigned int flags)
675 {
676 struct ifaddrmsg *ifm;
677 struct nlmsghdr *nlh;
678
679 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
680 if (nlh == NULL)
681 return -EMSGSIZE;
682
683 ifm = nlmsg_data(nlh);
684 ifm->ifa_family = AF_DECnet;
685 ifm->ifa_prefixlen = 16;
686 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
687 ifm->ifa_scope = ifa->ifa_scope;
688 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
689
690 if (ifa->ifa_address)
691 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
692 if (ifa->ifa_local)
693 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
694 if (ifa->ifa_label[0])
695 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
696
697 return nlmsg_end(skb, nlh);
698
699 nla_put_failure:
700 nlmsg_cancel(skb, nlh);
701 return -EMSGSIZE;
702 }
703
704 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
705 {
706 struct sk_buff *skb;
707 int err = -ENOBUFS;
708
709 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
710 if (skb == NULL)
711 goto errout;
712
713 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
714 if (err < 0) {
715 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
716 WARN_ON(err == -EMSGSIZE);
717 kfree_skb(skb);
718 goto errout;
719 }
720 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
721 return;
722 errout:
723 if (err < 0)
724 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
725 }
726
727 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
728 {
729 struct net *net = sock_net(skb->sk);
730 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
731 struct net_device *dev;
732 struct dn_dev *dn_db;
733 struct dn_ifaddr *ifa;
734
735 if (!net_eq(net, &init_net))
736 return 0;
737
738 skip_ndevs = cb->args[0];
739 skip_naddr = cb->args[1];
740
741 idx = 0;
742 for_each_netdev(&init_net, dev) {
743 if (idx < skip_ndevs)
744 goto cont;
745 else if (idx > skip_ndevs) {
746 /* Only skip over addresses for first dev dumped
747 * in this iteration (idx == skip_ndevs) */
748 skip_naddr = 0;
749 }
750
751 if ((dn_db = dev->dn_ptr) == NULL)
752 goto cont;
753
754 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
755 ifa = ifa->ifa_next, dn_idx++) {
756 if (dn_idx < skip_naddr)
757 continue;
758
759 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
760 cb->nlh->nlmsg_seq, RTM_NEWADDR,
761 NLM_F_MULTI) < 0)
762 goto done;
763 }
764 cont:
765 idx++;
766 }
767 done:
768 cb->args[0] = idx;
769 cb->args[1] = dn_idx;
770
771 return skb->len;
772 }
773
774 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
775 {
776 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
777 struct dn_ifaddr *ifa;
778 int rv = -ENODEV;
779
780 if (dn_db == NULL)
781 goto out;
782
783 rtnl_lock();
784 ifa = dn_db->ifa_list;
785 if (ifa != NULL) {
786 *addr = ifa->ifa_local;
787 rv = 0;
788 }
789 rtnl_unlock();
790 out:
791 return rv;
792 }
793
794 /*
795 * Find a default address to bind to.
796 *
797 * This is one of those areas where the initial VMS concepts don't really
798 * map onto the Linux concepts, and since we introduced multiple addresses
799 * per interface we have to cope with slightly odd ways of finding out what
800 * "our address" really is. Mostly it's not a problem; for this we just guess
801 * a sensible default. Eventually the routing code will take care of all the
802 * nasties for us I hope.
803 */
804 int dn_dev_bind_default(__le16 *addr)
805 {
806 struct net_device *dev;
807 int rv;
808 dev = dn_dev_get_default();
809 last_chance:
810 if (dev) {
811 rv = dn_dev_get_first(dev, addr);
812 dev_put(dev);
813 if (rv == 0 || dev == init_net.loopback_dev)
814 return rv;
815 }
816 dev = init_net.loopback_dev;
817 dev_hold(dev);
818 goto last_chance;
819 }
820
821 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
822 {
823 struct endnode_hello_message *msg;
824 struct sk_buff *skb = NULL;
825 __le16 *pktlen;
826 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
827
828 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
829 return;
830
831 skb->dev = dev;
832
833 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
834
835 msg->msgflg = 0x0D;
836 memcpy(msg->tiver, dn_eco_version, 3);
837 dn_dn2eth(msg->id, ifa->ifa_local);
838 msg->iinfo = DN_RT_INFO_ENDN;
839 msg->blksize = cpu_to_le16(mtu2blksize(dev));
840 msg->area = 0x00;
841 memset(msg->seed, 0, 8);
842 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
843
844 if (dn_db->router) {
845 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
846 dn_dn2eth(msg->neighbor, dn->addr);
847 }
848
849 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
850 msg->mpd = 0x00;
851 msg->datalen = 0x02;
852 memset(msg->data, 0xAA, 2);
853
854 pktlen = (__le16 *)skb_push(skb,2);
855 *pktlen = cpu_to_le16(skb->len - 2);
856
857 skb_reset_network_header(skb);
858
859 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
860 }
861
862
863 #define DRDELAY (5 * HZ)
864
865 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
866 {
867 /* First check time since device went up */
868 if ((jiffies - dn_db->uptime) < DRDELAY)
869 return 0;
870
871 /* If there is no router, then yes... */
872 if (!dn_db->router)
873 return 1;
874
875 /* otherwise only if we have a higher priority or.. */
876 if (dn->priority < dn_db->parms.priority)
877 return 1;
878
879 /* if we have equal priority and a higher node number */
880 if (dn->priority != dn_db->parms.priority)
881 return 0;
882
883 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
884 return 1;
885
886 return 0;
887 }
888
889 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
890 {
891 int n;
892 struct dn_dev *dn_db = dev->dn_ptr;
893 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
894 struct sk_buff *skb;
895 size_t size;
896 unsigned char *ptr;
897 unsigned char *i1, *i2;
898 __le16 *pktlen;
899 char *src;
900
901 if (mtu2blksize(dev) < (26 + 7))
902 return;
903
904 n = mtu2blksize(dev) - 26;
905 n /= 7;
906
907 if (n > 32)
908 n = 32;
909
910 size = 2 + 26 + 7 * n;
911
912 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
913 return;
914
915 skb->dev = dev;
916 ptr = skb_put(skb, size);
917
918 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
919 *ptr++ = 2; /* ECO */
920 *ptr++ = 0;
921 *ptr++ = 0;
922 dn_dn2eth(ptr, ifa->ifa_local);
923 src = ptr;
924 ptr += ETH_ALEN;
925 *ptr++ = dn_db->parms.forwarding == 1 ?
926 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
927 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
928 ptr += 2;
929 *ptr++ = dn_db->parms.priority; /* Priority */
930 *ptr++ = 0; /* Area: Reserved */
931 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
932 ptr += 2;
933 *ptr++ = 0; /* MPD: Reserved */
934 i1 = ptr++;
935 memset(ptr, 0, 7); /* Name: Reserved */
936 ptr += 7;
937 i2 = ptr++;
938
939 n = dn_neigh_elist(dev, ptr, n);
940
941 *i2 = 7 * n;
942 *i1 = 8 + *i2;
943
944 skb_trim(skb, (27 + *i2));
945
946 pktlen = (__le16 *)skb_push(skb, 2);
947 *pktlen = cpu_to_le16(skb->len - 2);
948
949 skb_reset_network_header(skb);
950
951 if (dn_am_i_a_router(dn, dn_db, ifa)) {
952 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
953 if (skb2) {
954 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
955 }
956 }
957
958 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
959 }
960
961 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
962 {
963 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
964
965 if (dn_db->parms.forwarding == 0)
966 dn_send_endnode_hello(dev, ifa);
967 else
968 dn_send_router_hello(dev, ifa);
969 }
970
971 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
972 {
973 int tdlen = 16;
974 int size = dev->hard_header_len + 2 + 4 + tdlen;
975 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
976 int i;
977 unsigned char *ptr;
978 char src[ETH_ALEN];
979
980 if (skb == NULL)
981 return ;
982
983 skb->dev = dev;
984 skb_push(skb, dev->hard_header_len);
985 ptr = skb_put(skb, 2 + 4 + tdlen);
986
987 *ptr++ = DN_RT_PKT_HELO;
988 *((__le16 *)ptr) = ifa->ifa_local;
989 ptr += 2;
990 *ptr++ = tdlen;
991
992 for(i = 0; i < tdlen; i++)
993 *ptr++ = 0252;
994
995 dn_dn2eth(src, ifa->ifa_local);
996 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
997 }
998
999 static int dn_eth_up(struct net_device *dev)
1000 {
1001 struct dn_dev *dn_db = dev->dn_ptr;
1002
1003 if (dn_db->parms.forwarding == 0)
1004 dev_mc_add(dev, dn_rt_all_end_mcast);
1005 else
1006 dev_mc_add(dev, dn_rt_all_rt_mcast);
1007
1008 dn_db->use_long = 1;
1009
1010 return 0;
1011 }
1012
1013 static void dn_eth_down(struct net_device *dev)
1014 {
1015 struct dn_dev *dn_db = dev->dn_ptr;
1016
1017 if (dn_db->parms.forwarding == 0)
1018 dev_mc_del(dev, dn_rt_all_end_mcast);
1019 else
1020 dev_mc_del(dev, dn_rt_all_rt_mcast);
1021 }
1022
1023 static void dn_dev_set_timer(struct net_device *dev);
1024
1025 static void dn_dev_timer_func(unsigned long arg)
1026 {
1027 struct net_device *dev = (struct net_device *)arg;
1028 struct dn_dev *dn_db = dev->dn_ptr;
1029 struct dn_ifaddr *ifa;
1030
1031 if (dn_db->t3 <= dn_db->parms.t2) {
1032 if (dn_db->parms.timer3) {
1033 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1034 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1035 dn_db->parms.timer3(dev, ifa);
1036 }
1037 }
1038 dn_db->t3 = dn_db->parms.t3;
1039 } else {
1040 dn_db->t3 -= dn_db->parms.t2;
1041 }
1042
1043 dn_dev_set_timer(dev);
1044 }
1045
1046 static void dn_dev_set_timer(struct net_device *dev)
1047 {
1048 struct dn_dev *dn_db = dev->dn_ptr;
1049
1050 if (dn_db->parms.t2 > dn_db->parms.t3)
1051 dn_db->parms.t2 = dn_db->parms.t3;
1052
1053 dn_db->timer.data = (unsigned long)dev;
1054 dn_db->timer.function = dn_dev_timer_func;
1055 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1056
1057 add_timer(&dn_db->timer);
1058 }
1059
1060 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1061 {
1062 int i;
1063 struct dn_dev_parms *p = dn_dev_list;
1064 struct dn_dev *dn_db;
1065
1066 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1067 if (p->type == dev->type)
1068 break;
1069 }
1070
1071 *err = -ENODEV;
1072 if (i == DN_DEV_LIST_SIZE)
1073 return NULL;
1074
1075 *err = -ENOBUFS;
1076 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1077 return NULL;
1078
1079 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1080 smp_wmb();
1081 dev->dn_ptr = dn_db;
1082 dn_db->dev = dev;
1083 init_timer(&dn_db->timer);
1084
1085 dn_db->uptime = jiffies;
1086
1087 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1088 if (!dn_db->neigh_parms) {
1089 dev->dn_ptr = NULL;
1090 kfree(dn_db);
1091 return NULL;
1092 }
1093
1094 if (dn_db->parms.up) {
1095 if (dn_db->parms.up(dev) < 0) {
1096 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1097 dev->dn_ptr = NULL;
1098 kfree(dn_db);
1099 return NULL;
1100 }
1101 }
1102
1103 dn_dev_sysctl_register(dev, &dn_db->parms);
1104
1105 dn_dev_set_timer(dev);
1106
1107 *err = 0;
1108 return dn_db;
1109 }
1110
1111
1112 /*
1113 * This processes a device up event. We only start up
1114 * the loopback device & ethernet devices with correct
1115 * MAC addreses automatically. Others must be started
1116 * specifically.
1117 *
1118 * FIXME: How should we configure the loopback address ? If we could dispense
1119 * with using decnet_address here and for autobind, it will be one less thing
1120 * for users to worry about setting up.
1121 */
1122
1123 void dn_dev_up(struct net_device *dev)
1124 {
1125 struct dn_ifaddr *ifa;
1126 __le16 addr = decnet_address;
1127 int maybe_default = 0;
1128 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1129
1130 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1131 return;
1132
1133 /*
1134 * Need to ensure that loopback device has a dn_db attached to it
1135 * to allow creation of neighbours against it, even though it might
1136 * not have a local address of its own. Might as well do the same for
1137 * all autoconfigured interfaces.
1138 */
1139 if (dn_db == NULL) {
1140 int err;
1141 dn_db = dn_dev_create(dev, &err);
1142 if (dn_db == NULL)
1143 return;
1144 }
1145
1146 if (dev->type == ARPHRD_ETHER) {
1147 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1148 return;
1149 addr = dn_eth2dn(dev->dev_addr);
1150 maybe_default = 1;
1151 }
1152
1153 if (addr == 0)
1154 return;
1155
1156 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1157 return;
1158
1159 ifa->ifa_local = ifa->ifa_address = addr;
1160 ifa->ifa_flags = 0;
1161 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1162 strcpy(ifa->ifa_label, dev->name);
1163
1164 dn_dev_set_ifa(dev, ifa);
1165
1166 /*
1167 * Automagically set the default device to the first automatically
1168 * configured ethernet card in the system.
1169 */
1170 if (maybe_default) {
1171 dev_hold(dev);
1172 if (dn_dev_set_default(dev, 0))
1173 dev_put(dev);
1174 }
1175 }
1176
1177 static void dn_dev_delete(struct net_device *dev)
1178 {
1179 struct dn_dev *dn_db = dev->dn_ptr;
1180
1181 if (dn_db == NULL)
1182 return;
1183
1184 del_timer_sync(&dn_db->timer);
1185 dn_dev_sysctl_unregister(&dn_db->parms);
1186 dn_dev_check_default(dev);
1187 neigh_ifdown(&dn_neigh_table, dev);
1188
1189 if (dn_db->parms.down)
1190 dn_db->parms.down(dev);
1191
1192 dev->dn_ptr = NULL;
1193
1194 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1195 neigh_ifdown(&dn_neigh_table, dev);
1196
1197 if (dn_db->router)
1198 neigh_release(dn_db->router);
1199 if (dn_db->peer)
1200 neigh_release(dn_db->peer);
1201
1202 kfree(dn_db);
1203 }
1204
1205 void dn_dev_down(struct net_device *dev)
1206 {
1207 struct dn_dev *dn_db = dev->dn_ptr;
1208 struct dn_ifaddr *ifa;
1209
1210 if (dn_db == NULL)
1211 return;
1212
1213 while((ifa = dn_db->ifa_list) != NULL) {
1214 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1215 dn_dev_free_ifa(ifa);
1216 }
1217
1218 dn_dev_delete(dev);
1219 }
1220
1221 void dn_dev_init_pkt(struct sk_buff *skb)
1222 {
1223 }
1224
1225 void dn_dev_veri_pkt(struct sk_buff *skb)
1226 {
1227 }
1228
1229 void dn_dev_hello(struct sk_buff *skb)
1230 {
1231 }
1232
1233 void dn_dev_devices_off(void)
1234 {
1235 struct net_device *dev;
1236
1237 rtnl_lock();
1238 for_each_netdev(&init_net, dev)
1239 dn_dev_down(dev);
1240 rtnl_unlock();
1241
1242 }
1243
1244 void dn_dev_devices_on(void)
1245 {
1246 struct net_device *dev;
1247
1248 rtnl_lock();
1249 for_each_netdev(&init_net, dev) {
1250 if (dev->flags & IFF_UP)
1251 dn_dev_up(dev);
1252 }
1253 rtnl_unlock();
1254 }
1255
1256 int register_dnaddr_notifier(struct notifier_block *nb)
1257 {
1258 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1259 }
1260
1261 int unregister_dnaddr_notifier(struct notifier_block *nb)
1262 {
1263 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1264 }
1265
1266 #ifdef CONFIG_PROC_FS
1267 static inline int is_dn_dev(struct net_device *dev)
1268 {
1269 return dev->dn_ptr != NULL;
1270 }
1271
1272 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1273 __acquires(rcu)
1274 {
1275 int i;
1276 struct net_device *dev;
1277
1278 rcu_read_lock();
1279
1280 if (*pos == 0)
1281 return SEQ_START_TOKEN;
1282
1283 i = 1;
1284 for_each_netdev_rcu(&init_net, dev) {
1285 if (!is_dn_dev(dev))
1286 continue;
1287
1288 if (i++ == *pos)
1289 return dev;
1290 }
1291
1292 return NULL;
1293 }
1294
1295 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1296 {
1297 struct net_device *dev;
1298
1299 ++*pos;
1300
1301 dev = (struct net_device *)v;
1302 if (v == SEQ_START_TOKEN)
1303 dev = net_device_entry(&init_net.dev_base_head);
1304
1305 for_each_netdev_continue_rcu(&init_net, dev) {
1306 if (!is_dn_dev(dev))
1307 continue;
1308
1309 return dev;
1310 }
1311
1312 return NULL;
1313 }
1314
1315 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1316 __releases(rcu)
1317 {
1318 rcu_read_unlock();
1319 }
1320
1321 static char *dn_type2asc(char type)
1322 {
1323 switch(type) {
1324 case DN_DEV_BCAST:
1325 return "B";
1326 case DN_DEV_UCAST:
1327 return "U";
1328 case DN_DEV_MPOINT:
1329 return "M";
1330 }
1331
1332 return "?";
1333 }
1334
1335 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1336 {
1337 if (v == SEQ_START_TOKEN)
1338 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1339 else {
1340 struct net_device *dev = v;
1341 char peer_buf[DN_ASCBUF_LEN];
1342 char router_buf[DN_ASCBUF_LEN];
1343 struct dn_dev *dn_db = dev->dn_ptr;
1344
1345 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1346 " %04hu %03d %02x %-10s %-7s %-7s\n",
1347 dev->name ? dev->name : "???",
1348 dn_type2asc(dn_db->parms.mode),
1349 0, 0,
1350 dn_db->t3, dn_db->parms.t3,
1351 mtu2blksize(dev),
1352 dn_db->parms.priority,
1353 dn_db->parms.state, dn_db->parms.name,
1354 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1355 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1356 }
1357 return 0;
1358 }
1359
1360 static const struct seq_operations dn_dev_seq_ops = {
1361 .start = dn_dev_seq_start,
1362 .next = dn_dev_seq_next,
1363 .stop = dn_dev_seq_stop,
1364 .show = dn_dev_seq_show,
1365 };
1366
1367 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1368 {
1369 return seq_open(file, &dn_dev_seq_ops);
1370 }
1371
1372 static const struct file_operations dn_dev_seq_fops = {
1373 .owner = THIS_MODULE,
1374 .open = dn_dev_seq_open,
1375 .read = seq_read,
1376 .llseek = seq_lseek,
1377 .release = seq_release,
1378 };
1379
1380 #endif /* CONFIG_PROC_FS */
1381
1382 static int addr[2];
1383 module_param_array(addr, int, NULL, 0444);
1384 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1385
1386 void __init dn_dev_init(void)
1387 {
1388 if (addr[0] > 63 || addr[0] < 0) {
1389 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1390 return;
1391 }
1392
1393 if (addr[1] > 1023 || addr[1] < 0) {
1394 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1395 return;
1396 }
1397
1398 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1399
1400 dn_dev_devices_on();
1401
1402 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1403 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1404 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1405
1406 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1407
1408 #ifdef CONFIG_SYSCTL
1409 {
1410 int i;
1411 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1412 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1413 }
1414 #endif /* CONFIG_SYSCTL */
1415 }
1416
1417 void __exit dn_dev_cleanup(void)
1418 {
1419 #ifdef CONFIG_SYSCTL
1420 {
1421 int i;
1422 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1423 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1424 }
1425 #endif /* CONFIG_SYSCTL */
1426
1427 proc_net_remove(&init_net, "decnet_dev");
1428
1429 dn_dev_devices_off();
1430 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree