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[NEIGH]: Use the ctl paths to create neighbours sysctls
[linux-2.6/linux-2.6-openrd.git] / net / decnet / dn_dev.c
blob39c89c682047270991780019a7f2e79f12f6f035
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 ctl_table dn_dev_dev[2];
177 ctl_table dn_dev_conf_dir[2];
178 ctl_table dn_dev_proto_dir[2];
179 ctl_table dn_dev_root_dir[2];
180 } dn_dev_sysctl = {
181 NULL,
182 {
183 {
184 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
185 .procname = "forwarding",
186 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
187 .maxlen = sizeof(int),
188 .mode = 0644,
189 .proc_handler = dn_forwarding_proc,
190 .strategy = dn_forwarding_sysctl,
191 },
192 {
193 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
194 .procname = "priority",
195 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
196 .maxlen = sizeof(int),
197 .mode = 0644,
198 .proc_handler = proc_dointvec_minmax,
199 .strategy = sysctl_intvec,
200 .extra1 = &min_priority,
201 .extra2 = &max_priority
202 },
203 {
204 .ctl_name = NET_DECNET_CONF_DEV_T2,
205 .procname = "t2",
206 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
207 .maxlen = sizeof(int),
208 .mode = 0644,
209 .proc_handler = proc_dointvec_minmax,
210 .strategy = sysctl_intvec,
211 .extra1 = &min_t2,
212 .extra2 = &max_t2
213 },
214 {
215 .ctl_name = NET_DECNET_CONF_DEV_T3,
216 .procname = "t3",
217 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
218 .maxlen = sizeof(int),
219 .mode = 0644,
220 .proc_handler = proc_dointvec_minmax,
221 .strategy = sysctl_intvec,
222 .extra1 = &min_t3,
223 .extra2 = &max_t3
224 },
225 {0}
226 },
227 {{
228 .ctl_name = 0,
229 .procname = "",
230 .mode = 0555,
231 .child = dn_dev_sysctl.dn_dev_vars
232 }, {0}},
233 {{
234 .ctl_name = NET_DECNET_CONF,
235 .procname = "conf",
236 .mode = 0555,
237 .child = dn_dev_sysctl.dn_dev_dev
238 }, {0}},
239 {{
240 .ctl_name = NET_DECNET,
241 .procname = "decnet",
242 .mode = 0555,
243 .child = dn_dev_sysctl.dn_dev_conf_dir
244 }, {0}},
245 {{
246 .ctl_name = CTL_NET,
247 .procname = "net",
248 .mode = 0555,
249 .child = dn_dev_sysctl.dn_dev_proto_dir
250 }, {0}}
251 };
252
253 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
254 {
255 struct dn_dev_sysctl_table *t;
256 int i;
257
258 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
259 if (t == NULL)
260 return;
261
262 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
263 long offset = (long)t->dn_dev_vars[i].data;
264 t->dn_dev_vars[i].data = ((char *)parms) + offset;
265 }
266
267 if (dev) {
268 t->dn_dev_dev[0].procname = dev->name;
269 t->dn_dev_dev[0].ctl_name = dev->ifindex;
270 } else {
271 t->dn_dev_dev[0].procname = parms->name;
272 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
273 }
274
275 t->dn_dev_dev[0].child = t->dn_dev_vars;
276 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
277 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
278 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
279 t->dn_dev_vars[0].extra1 = (void *)dev;
280
281 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir);
282 if (t->sysctl_header == NULL)
283 kfree(t);
284 else
285 parms->sysctl = t;
286 }
287
288 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
289 {
290 if (parms->sysctl) {
291 struct dn_dev_sysctl_table *t = parms->sysctl;
292 parms->sysctl = NULL;
293 unregister_sysctl_table(t->sysctl_header);
294 kfree(t);
295 }
296 }
297
298 static int dn_forwarding_proc(ctl_table *table, int write,
299 struct file *filep,
300 void __user *buffer,
301 size_t *lenp, loff_t *ppos)
302 {
303 #ifdef CONFIG_DECNET_ROUTER
304 struct net_device *dev = table->extra1;
305 struct dn_dev *dn_db;
306 int err;
307 int tmp, old;
308
309 if (table->extra1 == NULL)
310 return -EINVAL;
311
312 dn_db = dev->dn_ptr;
313 old = dn_db->parms.forwarding;
314
315 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
316
317 if ((err >= 0) && write) {
318 if (dn_db->parms.forwarding < 0)
319 dn_db->parms.forwarding = 0;
320 if (dn_db->parms.forwarding > 2)
321 dn_db->parms.forwarding = 2;
322 /*
323 * What an ugly hack this is... its works, just. It
324 * would be nice if sysctl/proc were just that little
325 * bit more flexible so I don't have to write a special
326 * routine, or suffer hacks like this - SJW
327 */
328 tmp = dn_db->parms.forwarding;
329 dn_db->parms.forwarding = old;
330 if (dn_db->parms.down)
331 dn_db->parms.down(dev);
332 dn_db->parms.forwarding = tmp;
333 if (dn_db->parms.up)
334 dn_db->parms.up(dev);
335 }
336
337 return err;
338 #else
339 return -EINVAL;
340 #endif
341 }
342
343 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
344 void __user *oldval, size_t __user *oldlenp,
345 void __user *newval, size_t newlen)
346 {
347 #ifdef CONFIG_DECNET_ROUTER
348 struct net_device *dev = table->extra1;
349 struct dn_dev *dn_db;
350 int value;
351
352 if (table->extra1 == NULL)
353 return -EINVAL;
354
355 dn_db = dev->dn_ptr;
356
357 if (newval && newlen) {
358 if (newlen != sizeof(int))
359 return -EINVAL;
360
361 if (get_user(value, (int __user *)newval))
362 return -EFAULT;
363 if (value < 0)
364 return -EINVAL;
365 if (value > 2)
366 return -EINVAL;
367
368 if (dn_db->parms.down)
369 dn_db->parms.down(dev);
370 dn_db->parms.forwarding = value;
371 if (dn_db->parms.up)
372 dn_db->parms.up(dev);
373 }
374
375 return 0;
376 #else
377 return -EINVAL;
378 #endif
379 }
380
381 #else /* CONFIG_SYSCTL */
382 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
383 {
384 }
385 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
386 {
387 }
388
389 #endif /* CONFIG_SYSCTL */
390
391 static inline __u16 mtu2blksize(struct net_device *dev)
392 {
393 u32 blksize = dev->mtu;
394 if (blksize > 0xffff)
395 blksize = 0xffff;
396
397 if (dev->type == ARPHRD_ETHER ||
398 dev->type == ARPHRD_PPP ||
399 dev->type == ARPHRD_IPGRE ||
400 dev->type == ARPHRD_LOOPBACK)
401 blksize -= 2;
402
403 return (__u16)blksize;
404 }
405
406 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
407 {
408 struct dn_ifaddr *ifa;
409
410 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
411
412 return ifa;
413 }
414
415 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
416 {
417 kfree(ifa);
418 }
419
420 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
421 {
422 struct dn_ifaddr *ifa1 = *ifap;
423 unsigned char mac_addr[6];
424 struct net_device *dev = dn_db->dev;
425
426 ASSERT_RTNL();
427
428 *ifap = ifa1->ifa_next;
429
430 if (dn_db->dev->type == ARPHRD_ETHER) {
431 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
432 dn_dn2eth(mac_addr, ifa1->ifa_local);
433 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
434 }
435 }
436
437 dn_ifaddr_notify(RTM_DELADDR, ifa1);
438 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
439 if (destroy) {
440 dn_dev_free_ifa(ifa1);
441
442 if (dn_db->ifa_list == NULL)
443 dn_dev_delete(dn_db->dev);
444 }
445 }
446
447 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
448 {
449 struct net_device *dev = dn_db->dev;
450 struct dn_ifaddr *ifa1;
451 unsigned char mac_addr[6];
452
453 ASSERT_RTNL();
454
455 /* Check for duplicates */
456 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
457 if (ifa1->ifa_local == ifa->ifa_local)
458 return -EEXIST;
459 }
460
461 if (dev->type == ARPHRD_ETHER) {
462 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
463 dn_dn2eth(mac_addr, ifa->ifa_local);
464 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
465 }
466 }
467
468 ifa->ifa_next = dn_db->ifa_list;
469 dn_db->ifa_list = ifa;
470
471 dn_ifaddr_notify(RTM_NEWADDR, ifa);
472 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
473
474 return 0;
475 }
476
477 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
478 {
479 struct dn_dev *dn_db = dev->dn_ptr;
480 int rv;
481
482 if (dn_db == NULL) {
483 int err;
484 dn_db = dn_dev_create(dev, &err);
485 if (dn_db == NULL)
486 return err;
487 }
488
489 ifa->ifa_dev = dn_db;
490
491 if (dev->flags & IFF_LOOPBACK)
492 ifa->ifa_scope = RT_SCOPE_HOST;
493
494 rv = dn_dev_insert_ifa(dn_db, ifa);
495 if (rv)
496 dn_dev_free_ifa(ifa);
497 return rv;
498 }
499
500
501 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
502 {
503 char buffer[DN_IFREQ_SIZE];
504 struct ifreq *ifr = (struct ifreq *)buffer;
505 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
506 struct dn_dev *dn_db;
507 struct net_device *dev;
508 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
509 int ret = 0;
510
511 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
512 return -EFAULT;
513 ifr->ifr_name[IFNAMSIZ-1] = 0;
514
515 #ifdef CONFIG_KMOD
516 dev_load(&init_net, ifr->ifr_name);
517 #endif
518
519 switch(cmd) {
520 case SIOCGIFADDR:
521 break;
522 case SIOCSIFADDR:
523 if (!capable(CAP_NET_ADMIN))
524 return -EACCES;
525 if (sdn->sdn_family != AF_DECnet)
526 return -EINVAL;
527 break;
528 default:
529 return -EINVAL;
530 }
531
532 rtnl_lock();
533
534 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
535 ret = -ENODEV;
536 goto done;
537 }
538
539 if ((dn_db = dev->dn_ptr) != NULL) {
540 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
541 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
542 break;
543 }
544
545 if (ifa == NULL && cmd != SIOCSIFADDR) {
546 ret = -EADDRNOTAVAIL;
547 goto done;
548 }
549
550 switch(cmd) {
551 case SIOCGIFADDR:
552 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
553 goto rarok;
554
555 case SIOCSIFADDR:
556 if (!ifa) {
557 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
558 ret = -ENOBUFS;
559 break;
560 }
561 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
562 } else {
563 if (ifa->ifa_local == dn_saddr2dn(sdn))
564 break;
565 dn_dev_del_ifa(dn_db, ifap, 0);
566 }
567
568 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
569
570 ret = dn_dev_set_ifa(dev, ifa);
571 }
572 done:
573 rtnl_unlock();
574
575 return ret;
576 rarok:
577 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
578 ret = -EFAULT;
579 goto done;
580 }
581
582 struct net_device *dn_dev_get_default(void)
583 {
584 struct net_device *dev;
585 read_lock(&dndev_lock);
586 dev = decnet_default_device;
587 if (dev) {
588 if (dev->dn_ptr)
589 dev_hold(dev);
590 else
591 dev = NULL;
592 }
593 read_unlock(&dndev_lock);
594 return dev;
595 }
596
597 int dn_dev_set_default(struct net_device *dev, int force)
598 {
599 struct net_device *old = NULL;
600 int rv = -EBUSY;
601 if (!dev->dn_ptr)
602 return -ENODEV;
603 write_lock(&dndev_lock);
604 if (force || decnet_default_device == NULL) {
605 old = decnet_default_device;
606 decnet_default_device = dev;
607 rv = 0;
608 }
609 write_unlock(&dndev_lock);
610 if (old)
611 dev_put(old);
612 return rv;
613 }
614
615 static void dn_dev_check_default(struct net_device *dev)
616 {
617 write_lock(&dndev_lock);
618 if (dev == decnet_default_device) {
619 decnet_default_device = NULL;
620 } else {
621 dev = NULL;
622 }
623 write_unlock(&dndev_lock);
624 if (dev)
625 dev_put(dev);
626 }
627
628 static struct dn_dev *dn_dev_by_index(int ifindex)
629 {
630 struct net_device *dev;
631 struct dn_dev *dn_dev = NULL;
632 dev = dev_get_by_index(&init_net, ifindex);
633 if (dev) {
634 dn_dev = dev->dn_ptr;
635 dev_put(dev);
636 }
637
638 return dn_dev;
639 }
640
641 static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
642 [IFA_ADDRESS] = { .type = NLA_U16 },
643 [IFA_LOCAL] = { .type = NLA_U16 },
644 [IFA_LABEL] = { .type = NLA_STRING,
645 .len = IFNAMSIZ - 1 },
646 };
647
648 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
649 {
650 struct net *net = skb->sk->sk_net;
651 struct nlattr *tb[IFA_MAX+1];
652 struct dn_dev *dn_db;
653 struct ifaddrmsg *ifm;
654 struct dn_ifaddr *ifa, **ifap;
655 int err = -EINVAL;
656
657 if (net != &init_net)
658 goto errout;
659
660 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
661 if (err < 0)
662 goto errout;
663
664 err = -ENODEV;
665 ifm = nlmsg_data(nlh);
666 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
667 goto errout;
668
669 err = -EADDRNOTAVAIL;
670 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
671 if (tb[IFA_LOCAL] &&
672 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
673 continue;
674
675 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
676 continue;
677
678 dn_dev_del_ifa(dn_db, ifap, 1);
679 return 0;
680 }
681
682 errout:
683 return err;
684 }
685
686 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
687 {
688 struct net *net = skb->sk->sk_net;
689 struct nlattr *tb[IFA_MAX+1];
690 struct net_device *dev;
691 struct dn_dev *dn_db;
692 struct ifaddrmsg *ifm;
693 struct dn_ifaddr *ifa;
694 int err;
695
696 if (net != &init_net)
697 return -EINVAL;
698
699 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
700 if (err < 0)
701 return err;
702
703 if (tb[IFA_LOCAL] == NULL)
704 return -EINVAL;
705
706 ifm = nlmsg_data(nlh);
707 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
708 return -ENODEV;
709
710 if ((dn_db = dev->dn_ptr) == NULL) {
711 int err;
712 dn_db = dn_dev_create(dev, &err);
713 if (!dn_db)
714 return err;
715 }
716
717 if ((ifa = dn_dev_alloc_ifa()) == NULL)
718 return -ENOBUFS;
719
720 if (tb[IFA_ADDRESS] == NULL)
721 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
722
723 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
724 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
725 ifa->ifa_flags = ifm->ifa_flags;
726 ifa->ifa_scope = ifm->ifa_scope;
727 ifa->ifa_dev = dn_db;
728
729 if (tb[IFA_LABEL])
730 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
731 else
732 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
733
734 err = dn_dev_insert_ifa(dn_db, ifa);
735 if (err)
736 dn_dev_free_ifa(ifa);
737
738 return err;
739 }
740
741 static inline size_t dn_ifaddr_nlmsg_size(void)
742 {
743 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
744 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
745 + nla_total_size(2) /* IFA_ADDRESS */
746 + nla_total_size(2); /* IFA_LOCAL */
747 }
748
749 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
750 u32 pid, u32 seq, int event, unsigned int flags)
751 {
752 struct ifaddrmsg *ifm;
753 struct nlmsghdr *nlh;
754
755 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
756 if (nlh == NULL)
757 return -EMSGSIZE;
758
759 ifm = nlmsg_data(nlh);
760 ifm->ifa_family = AF_DECnet;
761 ifm->ifa_prefixlen = 16;
762 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
763 ifm->ifa_scope = ifa->ifa_scope;
764 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
765
766 if (ifa->ifa_address)
767 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
768 if (ifa->ifa_local)
769 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
770 if (ifa->ifa_label[0])
771 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
772
773 return nlmsg_end(skb, nlh);
774
775 nla_put_failure:
776 nlmsg_cancel(skb, nlh);
777 return -EMSGSIZE;
778 }
779
780 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
781 {
782 struct sk_buff *skb;
783 int err = -ENOBUFS;
784
785 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
786 if (skb == NULL)
787 goto errout;
788
789 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
790 if (err < 0) {
791 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
792 WARN_ON(err == -EMSGSIZE);
793 kfree_skb(skb);
794 goto errout;
795 }
796 err = rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
797 errout:
798 if (err < 0)
799 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
800 }
801
802 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
803 {
804 struct net *net = skb->sk->sk_net;
805 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
806 struct net_device *dev;
807 struct dn_dev *dn_db;
808 struct dn_ifaddr *ifa;
809
810 if (net != &init_net)
811 return 0;
812
813 skip_ndevs = cb->args[0];
814 skip_naddr = cb->args[1];
815
816 idx = 0;
817 for_each_netdev(&init_net, dev) {
818 if (idx < skip_ndevs)
819 goto cont;
820 else if (idx > skip_ndevs) {
821 /* Only skip over addresses for first dev dumped
822 * in this iteration (idx == skip_ndevs) */
823 skip_naddr = 0;
824 }
825
826 if ((dn_db = dev->dn_ptr) == NULL)
827 goto cont;
828
829 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
830 ifa = ifa->ifa_next, dn_idx++) {
831 if (dn_idx < skip_naddr)
832 continue;
833
834 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
835 cb->nlh->nlmsg_seq, RTM_NEWADDR,
836 NLM_F_MULTI) < 0)
837 goto done;
838 }
839 cont:
840 idx++;
841 }
842 done:
843 cb->args[0] = idx;
844 cb->args[1] = dn_idx;
845
846 return skb->len;
847 }
848
849 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
850 {
851 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
852 struct dn_ifaddr *ifa;
853 int rv = -ENODEV;
854 if (dn_db == NULL)
855 goto out;
856 ifa = dn_db->ifa_list;
857 if (ifa != NULL) {
858 *addr = ifa->ifa_local;
859 rv = 0;
860 }
861 out:
862 return rv;
863 }
864
865 /*
866 * Find a default address to bind to.
867 *
868 * This is one of those areas where the initial VMS concepts don't really
869 * map onto the Linux concepts, and since we introduced multiple addresses
870 * per interface we have to cope with slightly odd ways of finding out what
871 * "our address" really is. Mostly it's not a problem; for this we just guess
872 * a sensible default. Eventually the routing code will take care of all the
873 * nasties for us I hope.
874 */
875 int dn_dev_bind_default(__le16 *addr)
876 {
877 struct net_device *dev;
878 int rv;
879 dev = dn_dev_get_default();
880 last_chance:
881 if (dev) {
882 read_lock(&dev_base_lock);
883 rv = dn_dev_get_first(dev, addr);
884 read_unlock(&dev_base_lock);
885 dev_put(dev);
886 if (rv == 0 || dev == init_net.loopback_dev)
887 return rv;
888 }
889 dev = init_net.loopback_dev;
890 dev_hold(dev);
891 goto last_chance;
892 }
893
894 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
895 {
896 struct endnode_hello_message *msg;
897 struct sk_buff *skb = NULL;
898 __le16 *pktlen;
899 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
900
901 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
902 return;
903
904 skb->dev = dev;
905
906 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
907
908 msg->msgflg = 0x0D;
909 memcpy(msg->tiver, dn_eco_version, 3);
910 dn_dn2eth(msg->id, ifa->ifa_local);
911 msg->iinfo = DN_RT_INFO_ENDN;
912 msg->blksize = dn_htons(mtu2blksize(dev));
913 msg->area = 0x00;
914 memset(msg->seed, 0, 8);
915 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
916
917 if (dn_db->router) {
918 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
919 dn_dn2eth(msg->neighbor, dn->addr);
920 }
921
922 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
923 msg->mpd = 0x00;
924 msg->datalen = 0x02;
925 memset(msg->data, 0xAA, 2);
926
927 pktlen = (__le16 *)skb_push(skb,2);
928 *pktlen = dn_htons(skb->len - 2);
929
930 skb_reset_network_header(skb);
931
932 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
933 }
934
935
936 #define DRDELAY (5 * HZ)
937
938 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
939 {
940 /* First check time since device went up */
941 if ((jiffies - dn_db->uptime) < DRDELAY)
942 return 0;
943
944 /* If there is no router, then yes... */
945 if (!dn_db->router)
946 return 1;
947
948 /* otherwise only if we have a higher priority or.. */
949 if (dn->priority < dn_db->parms.priority)
950 return 1;
951
952 /* if we have equal priority and a higher node number */
953 if (dn->priority != dn_db->parms.priority)
954 return 0;
955
956 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
957 return 1;
958
959 return 0;
960 }
961
962 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
963 {
964 int n;
965 struct dn_dev *dn_db = dev->dn_ptr;
966 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
967 struct sk_buff *skb;
968 size_t size;
969 unsigned char *ptr;
970 unsigned char *i1, *i2;
971 __le16 *pktlen;
972 char *src;
973
974 if (mtu2blksize(dev) < (26 + 7))
975 return;
976
977 n = mtu2blksize(dev) - 26;
978 n /= 7;
979
980 if (n > 32)
981 n = 32;
982
983 size = 2 + 26 + 7 * n;
984
985 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
986 return;
987
988 skb->dev = dev;
989 ptr = skb_put(skb, size);
990
991 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
992 *ptr++ = 2; /* ECO */
993 *ptr++ = 0;
994 *ptr++ = 0;
995 dn_dn2eth(ptr, ifa->ifa_local);
996 src = ptr;
997 ptr += ETH_ALEN;
998 *ptr++ = dn_db->parms.forwarding == 1 ?
999 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
1000 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
1001 ptr += 2;
1002 *ptr++ = dn_db->parms.priority; /* Priority */
1003 *ptr++ = 0; /* Area: Reserved */
1004 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
1005 ptr += 2;
1006 *ptr++ = 0; /* MPD: Reserved */
1007 i1 = ptr++;
1008 memset(ptr, 0, 7); /* Name: Reserved */
1009 ptr += 7;
1010 i2 = ptr++;
1011
1012 n = dn_neigh_elist(dev, ptr, n);
1013
1014 *i2 = 7 * n;
1015 *i1 = 8 + *i2;
1016
1017 skb_trim(skb, (27 + *i2));
1018
1019 pktlen = (__le16 *)skb_push(skb, 2);
1020 *pktlen = dn_htons(skb->len - 2);
1021
1022 skb_reset_network_header(skb);
1023
1024 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1025 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1026 if (skb2) {
1027 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1028 }
1029 }
1030
1031 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1032 }
1033
1034 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1035 {
1036 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1037
1038 if (dn_db->parms.forwarding == 0)
1039 dn_send_endnode_hello(dev, ifa);
1040 else
1041 dn_send_router_hello(dev, ifa);
1042 }
1043
1044 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1045 {
1046 int tdlen = 16;
1047 int size = dev->hard_header_len + 2 + 4 + tdlen;
1048 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1049 int i;
1050 unsigned char *ptr;
1051 char src[ETH_ALEN];
1052
1053 if (skb == NULL)
1054 return ;
1055
1056 skb->dev = dev;
1057 skb_push(skb, dev->hard_header_len);
1058 ptr = skb_put(skb, 2 + 4 + tdlen);
1059
1060 *ptr++ = DN_RT_PKT_HELO;
1061 *((__le16 *)ptr) = ifa->ifa_local;
1062 ptr += 2;
1063 *ptr++ = tdlen;
1064
1065 for(i = 0; i < tdlen; i++)
1066 *ptr++ = 0252;
1067
1068 dn_dn2eth(src, ifa->ifa_local);
1069 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1070 }
1071
1072 static int dn_eth_up(struct net_device *dev)
1073 {
1074 struct dn_dev *dn_db = dev->dn_ptr;
1075
1076 if (dn_db->parms.forwarding == 0)
1077 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1078 else
1079 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1080
1081 dn_db->use_long = 1;
1082
1083 return 0;
1084 }
1085
1086 static void dn_eth_down(struct net_device *dev)
1087 {
1088 struct dn_dev *dn_db = dev->dn_ptr;
1089
1090 if (dn_db->parms.forwarding == 0)
1091 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1092 else
1093 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1094 }
1095
1096 static void dn_dev_set_timer(struct net_device *dev);
1097
1098 static void dn_dev_timer_func(unsigned long arg)
1099 {
1100 struct net_device *dev = (struct net_device *)arg;
1101 struct dn_dev *dn_db = dev->dn_ptr;
1102 struct dn_ifaddr *ifa;
1103
1104 if (dn_db->t3 <= dn_db->parms.t2) {
1105 if (dn_db->parms.timer3) {
1106 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1107 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1108 dn_db->parms.timer3(dev, ifa);
1109 }
1110 }
1111 dn_db->t3 = dn_db->parms.t3;
1112 } else {
1113 dn_db->t3 -= dn_db->parms.t2;
1114 }
1115
1116 dn_dev_set_timer(dev);
1117 }
1118
1119 static void dn_dev_set_timer(struct net_device *dev)
1120 {
1121 struct dn_dev *dn_db = dev->dn_ptr;
1122
1123 if (dn_db->parms.t2 > dn_db->parms.t3)
1124 dn_db->parms.t2 = dn_db->parms.t3;
1125
1126 dn_db->timer.data = (unsigned long)dev;
1127 dn_db->timer.function = dn_dev_timer_func;
1128 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1129
1130 add_timer(&dn_db->timer);
1131 }
1132
1133 struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1134 {
1135 int i;
1136 struct dn_dev_parms *p = dn_dev_list;
1137 struct dn_dev *dn_db;
1138
1139 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1140 if (p->type == dev->type)
1141 break;
1142 }
1143
1144 *err = -ENODEV;
1145 if (i == DN_DEV_LIST_SIZE)
1146 return NULL;
1147
1148 *err = -ENOBUFS;
1149 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1150 return NULL;
1151
1152 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1153 smp_wmb();
1154 dev->dn_ptr = dn_db;
1155 dn_db->dev = dev;
1156 init_timer(&dn_db->timer);
1157
1158 dn_db->uptime = jiffies;
1159
1160 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1161 if (!dn_db->neigh_parms) {
1162 dev->dn_ptr = NULL;
1163 kfree(dn_db);
1164 return NULL;
1165 }
1166
1167 if (dn_db->parms.up) {
1168 if (dn_db->parms.up(dev) < 0) {
1169 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1170 dev->dn_ptr = NULL;
1171 kfree(dn_db);
1172 return NULL;
1173 }
1174 }
1175
1176 dn_dev_sysctl_register(dev, &dn_db->parms);
1177
1178 dn_dev_set_timer(dev);
1179
1180 *err = 0;
1181 return dn_db;
1182 }
1183
1184
1185 /*
1186 * This processes a device up event. We only start up
1187 * the loopback device & ethernet devices with correct
1188 * MAC addreses automatically. Others must be started
1189 * specifically.
1190 *
1191 * FIXME: How should we configure the loopback address ? If we could dispense
1192 * with using decnet_address here and for autobind, it will be one less thing
1193 * for users to worry about setting up.
1194 */
1195
1196 void dn_dev_up(struct net_device *dev)
1197 {
1198 struct dn_ifaddr *ifa;
1199 __le16 addr = decnet_address;
1200 int maybe_default = 0;
1201 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1202
1203 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1204 return;
1205
1206 /*
1207 * Need to ensure that loopback device has a dn_db attached to it
1208 * to allow creation of neighbours against it, even though it might
1209 * not have a local address of its own. Might as well do the same for
1210 * all autoconfigured interfaces.
1211 */
1212 if (dn_db == NULL) {
1213 int err;
1214 dn_db = dn_dev_create(dev, &err);
1215 if (dn_db == NULL)
1216 return;
1217 }
1218
1219 if (dev->type == ARPHRD_ETHER) {
1220 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1221 return;
1222 addr = dn_eth2dn(dev->dev_addr);
1223 maybe_default = 1;
1224 }
1225
1226 if (addr == 0)
1227 return;
1228
1229 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1230 return;
1231
1232 ifa->ifa_local = ifa->ifa_address = addr;
1233 ifa->ifa_flags = 0;
1234 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1235 strcpy(ifa->ifa_label, dev->name);
1236
1237 dn_dev_set_ifa(dev, ifa);
1238
1239 /*
1240 * Automagically set the default device to the first automatically
1241 * configured ethernet card in the system.
1242 */
1243 if (maybe_default) {
1244 dev_hold(dev);
1245 if (dn_dev_set_default(dev, 0))
1246 dev_put(dev);
1247 }
1248 }
1249
1250 static void dn_dev_delete(struct net_device *dev)
1251 {
1252 struct dn_dev *dn_db = dev->dn_ptr;
1253
1254 if (dn_db == NULL)
1255 return;
1256
1257 del_timer_sync(&dn_db->timer);
1258 dn_dev_sysctl_unregister(&dn_db->parms);
1259 dn_dev_check_default(dev);
1260 neigh_ifdown(&dn_neigh_table, dev);
1261
1262 if (dn_db->parms.down)
1263 dn_db->parms.down(dev);
1264
1265 dev->dn_ptr = NULL;
1266
1267 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1268 neigh_ifdown(&dn_neigh_table, dev);
1269
1270 if (dn_db->router)
1271 neigh_release(dn_db->router);
1272 if (dn_db->peer)
1273 neigh_release(dn_db->peer);
1274
1275 kfree(dn_db);
1276 }
1277
1278 void dn_dev_down(struct net_device *dev)
1279 {
1280 struct dn_dev *dn_db = dev->dn_ptr;
1281 struct dn_ifaddr *ifa;
1282
1283 if (dn_db == NULL)
1284 return;
1285
1286 while((ifa = dn_db->ifa_list) != NULL) {
1287 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1288 dn_dev_free_ifa(ifa);
1289 }
1290
1291 dn_dev_delete(dev);
1292 }
1293
1294 void dn_dev_init_pkt(struct sk_buff *skb)
1295 {
1296 return;
1297 }
1298
1299 void dn_dev_veri_pkt(struct sk_buff *skb)
1300 {
1301 return;
1302 }
1303
1304 void dn_dev_hello(struct sk_buff *skb)
1305 {
1306 return;
1307 }
1308
1309 void dn_dev_devices_off(void)
1310 {
1311 struct net_device *dev;
1312
1313 rtnl_lock();
1314 for_each_netdev(&init_net, dev)
1315 dn_dev_down(dev);
1316 rtnl_unlock();
1317
1318 }
1319
1320 void dn_dev_devices_on(void)
1321 {
1322 struct net_device *dev;
1323
1324 rtnl_lock();
1325 for_each_netdev(&init_net, dev) {
1326 if (dev->flags & IFF_UP)
1327 dn_dev_up(dev);
1328 }
1329 rtnl_unlock();
1330 }
1331
1332 int register_dnaddr_notifier(struct notifier_block *nb)
1333 {
1334 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1335 }
1336
1337 int unregister_dnaddr_notifier(struct notifier_block *nb)
1338 {
1339 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1340 }
1341
1342 #ifdef CONFIG_PROC_FS
1343 static inline int is_dn_dev(struct net_device *dev)
1344 {
1345 return dev->dn_ptr != NULL;
1346 }
1347
1348 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1349 {
1350 int i;
1351 struct net_device *dev;
1352
1353 read_lock(&dev_base_lock);
1354
1355 if (*pos == 0)
1356 return SEQ_START_TOKEN;
1357
1358 i = 1;
1359 for_each_netdev(&init_net, dev) {
1360 if (!is_dn_dev(dev))
1361 continue;
1362
1363 if (i++ == *pos)
1364 return dev;
1365 }
1366
1367 return NULL;
1368 }
1369
1370 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1371 {
1372 struct net_device *dev;
1373
1374 ++*pos;
1375
1376 dev = (struct net_device *)v;
1377 if (v == SEQ_START_TOKEN)
1378 dev = net_device_entry(&init_net.dev_base_head);
1379
1380 for_each_netdev_continue(&init_net, dev) {
1381 if (!is_dn_dev(dev))
1382 continue;
1383
1384 return dev;
1385 }
1386
1387 return NULL;
1388 }
1389
1390 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1391 {
1392 read_unlock(&dev_base_lock);
1393 }
1394
1395 static char *dn_type2asc(char type)
1396 {
1397 switch(type) {
1398 case DN_DEV_BCAST:
1399 return "B";
1400 case DN_DEV_UCAST:
1401 return "U";
1402 case DN_DEV_MPOINT:
1403 return "M";
1404 }
1405
1406 return "?";
1407 }
1408
1409 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1410 {
1411 if (v == SEQ_START_TOKEN)
1412 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1413 else {
1414 struct net_device *dev = v;
1415 char peer_buf[DN_ASCBUF_LEN];
1416 char router_buf[DN_ASCBUF_LEN];
1417 struct dn_dev *dn_db = dev->dn_ptr;
1418
1419 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1420 " %04hu %03d %02x %-10s %-7s %-7s\n",
1421 dev->name ? dev->name : "???",
1422 dn_type2asc(dn_db->parms.mode),
1423 0, 0,
1424 dn_db->t3, dn_db->parms.t3,
1425 mtu2blksize(dev),
1426 dn_db->parms.priority,
1427 dn_db->parms.state, dn_db->parms.name,
1428 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1429 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1430 }
1431 return 0;
1432 }
1433
1434 static const struct seq_operations dn_dev_seq_ops = {
1435 .start = dn_dev_seq_start,
1436 .next = dn_dev_seq_next,
1437 .stop = dn_dev_seq_stop,
1438 .show = dn_dev_seq_show,
1439 };
1440
1441 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1442 {
1443 return seq_open(file, &dn_dev_seq_ops);
1444 }
1445
1446 static const struct file_operations dn_dev_seq_fops = {
1447 .owner = THIS_MODULE,
1448 .open = dn_dev_seq_open,
1449 .read = seq_read,
1450 .llseek = seq_lseek,
1451 .release = seq_release,
1452 };
1453
1454 #endif /* CONFIG_PROC_FS */
1455
1456 static int addr[2];
1457 module_param_array(addr, int, NULL, 0444);
1458 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1459
1460 void __init dn_dev_init(void)
1461 {
1462 if (addr[0] > 63 || addr[0] < 0) {
1463 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1464 return;
1465 }
1466
1467 if (addr[1] > 1023 || addr[1] < 0) {
1468 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1469 return;
1470 }
1471
1472 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1473
1474 dn_dev_devices_on();
1475
1476 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1477 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1478 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1479
1480 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1481
1482 #ifdef CONFIG_SYSCTL
1483 {
1484 int i;
1485 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1486 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1487 }
1488 #endif /* CONFIG_SYSCTL */
1489 }
1490
1491 void __exit dn_dev_cleanup(void)
1492 {
1493 #ifdef CONFIG_SYSCTL
1494 {
1495 int i;
1496 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1497 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1498 }
1499 #endif /* CONFIG_SYSCTL */
1500
1501 proc_net_remove(&init_net, "decnet_dev");
1502
1503 dn_dev_devices_off();
1504 }
linux 2.6 git repository for openrd