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relay: fix bogus cast in subbuf_splice_actor()
[wrt350n-kernel.git] / net / decnet / dn_dev.c
blobfa6604fcf0e7875837180953c47db8bd42525098
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/neighbour.h>
46 #include <net/dst.h>
47 #include <net/flow.h>
48 #include <net/fib_rules.h>
49 #include <net/netlink.h>
50 #include <net/dn.h>
51 #include <net/dn_dev.h>
52 #include <net/dn_route.h>
53 #include <net/dn_neigh.h>
54 #include <net/dn_fib.h>
55
56 #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
57
58 static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
59 static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
60 static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
61 static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
62
63 extern struct neigh_table dn_neigh_table;
64
65 /*
66 * decnet_address is kept in network order.
67 */
68 __le16 decnet_address = 0;
69
70 static DEFINE_RWLOCK(dndev_lock);
71 static struct net_device *decnet_default_device;
72 static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
73
74 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
75 static void dn_dev_delete(struct net_device *dev);
76 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
77
78 static int dn_eth_up(struct net_device *);
79 static void dn_eth_down(struct net_device *);
80 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
81 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82
83 static struct dn_dev_parms dn_dev_list[] = {
84 {
85 .type = ARPHRD_ETHER, /* Ethernet */
86 .mode = DN_DEV_BCAST,
87 .state = DN_DEV_S_RU,
88 .t2 = 1,
89 .t3 = 10,
90 .name = "ethernet",
91 .ctl_name = NET_DECNET_CONF_ETHER,
92 .up = dn_eth_up,
93 .down = dn_eth_down,
94 .timer3 = dn_send_brd_hello,
95 },
96 {
97 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
98 .mode = DN_DEV_BCAST,
99 .state = DN_DEV_S_RU,
100 .t2 = 1,
101 .t3 = 10,
102 .name = "ipgre",
103 .ctl_name = NET_DECNET_CONF_GRE,
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 .ctl_name = NET_DECNET_CONF_X25,
115 .timer3 = dn_send_ptp_hello,
116 },
117 #endif
118 #if 0
119 {
120 .type = ARPHRD_PPP, /* DECnet over PPP */
121 .mode = DN_DEV_BCAST,
122 .state = DN_DEV_S_RU,
123 .t2 = 1,
124 .t3 = 10,
125 .name = "ppp",
126 .ctl_name = NET_DECNET_CONF_PPP,
127 .timer3 = dn_send_brd_hello,
128 },
129 #endif
130 {
131 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
132 .mode = DN_DEV_UCAST,
133 .state = DN_DEV_S_DS,
134 .t2 = 1,
135 .t3 = 120,
136 .name = "ddcmp",
137 .ctl_name = NET_DECNET_CONF_DDCMP,
138 .timer3 = dn_send_ptp_hello,
139 },
140 {
141 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
142 .mode = DN_DEV_BCAST,
143 .state = DN_DEV_S_RU,
144 .t2 = 1,
145 .t3 = 10,
146 .name = "loopback",
147 .ctl_name = NET_DECNET_CONF_LOOPBACK,
148 .timer3 = dn_send_brd_hello,
149 }
150 };
151
152 #define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms))
153
154 #define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
155
156 #ifdef CONFIG_SYSCTL
157
158 static int min_t2[] = { 1 };
159 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
160 static int min_t3[] = { 1 };
161 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
162
163 static int min_priority[1];
164 static int max_priority[] = { 127 }; /* From DECnet spec */
165
166 static int dn_forwarding_proc(ctl_table *, int, struct file *,
167 void __user *, size_t *, loff_t *);
168 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
169 void __user *oldval, size_t __user *oldlenp,
170 void __user *newval, size_t newlen);
171
172 static struct dn_dev_sysctl_table {
173 struct ctl_table_header *sysctl_header;
174 ctl_table dn_dev_vars[5];
175 ctl_table dn_dev_dev[2];
176 ctl_table dn_dev_conf_dir[2];
177 ctl_table dn_dev_proto_dir[2];
178 ctl_table dn_dev_root_dir[2];
179 } dn_dev_sysctl = {
180 NULL,
181 {
182 {
183 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
184 .procname = "forwarding",
185 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
186 .maxlen = sizeof(int),
187 .mode = 0644,
188 .proc_handler = dn_forwarding_proc,
189 .strategy = dn_forwarding_sysctl,
190 },
191 {
192 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
193 .procname = "priority",
194 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
195 .maxlen = sizeof(int),
196 .mode = 0644,
197 .proc_handler = proc_dointvec_minmax,
198 .strategy = sysctl_intvec,
199 .extra1 = &min_priority,
200 .extra2 = &max_priority
201 },
202 {
203 .ctl_name = NET_DECNET_CONF_DEV_T2,
204 .procname = "t2",
205 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
206 .maxlen = sizeof(int),
207 .mode = 0644,
208 .proc_handler = proc_dointvec_minmax,
209 .strategy = sysctl_intvec,
210 .extra1 = &min_t2,
211 .extra2 = &max_t2
212 },
213 {
214 .ctl_name = NET_DECNET_CONF_DEV_T3,
215 .procname = "t3",
216 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
217 .maxlen = sizeof(int),
218 .mode = 0644,
219 .proc_handler = proc_dointvec_minmax,
220 .strategy = sysctl_intvec,
221 .extra1 = &min_t3,
222 .extra2 = &max_t3
223 },
224 {0}
225 },
226 {{
227 .ctl_name = 0,
228 .procname = "",
229 .mode = 0555,
230 .child = dn_dev_sysctl.dn_dev_vars
231 }, {0}},
232 {{
233 .ctl_name = NET_DECNET_CONF,
234 .procname = "conf",
235 .mode = 0555,
236 .child = dn_dev_sysctl.dn_dev_dev
237 }, {0}},
238 {{
239 .ctl_name = NET_DECNET,
240 .procname = "decnet",
241 .mode = 0555,
242 .child = dn_dev_sysctl.dn_dev_conf_dir
243 }, {0}},
244 {{
245 .ctl_name = CTL_NET,
246 .procname = "net",
247 .mode = 0555,
248 .child = dn_dev_sysctl.dn_dev_proto_dir
249 }, {0}}
250 };
251
252 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
253 {
254 struct dn_dev_sysctl_table *t;
255 int i;
256
257 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
258 if (t == NULL)
259 return;
260
261 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
262 long offset = (long)t->dn_dev_vars[i].data;
263 t->dn_dev_vars[i].data = ((char *)parms) + offset;
264 }
265
266 if (dev) {
267 t->dn_dev_dev[0].procname = dev->name;
268 t->dn_dev_dev[0].ctl_name = dev->ifindex;
269 } else {
270 t->dn_dev_dev[0].procname = parms->name;
271 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
272 }
273
274 t->dn_dev_dev[0].child = t->dn_dev_vars;
275 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
276 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
277 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
278 t->dn_dev_vars[0].extra1 = (void *)dev;
279
280 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir);
281 if (t->sysctl_header == NULL)
282 kfree(t);
283 else
284 parms->sysctl = t;
285 }
286
287 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
288 {
289 if (parms->sysctl) {
290 struct dn_dev_sysctl_table *t = parms->sysctl;
291 parms->sysctl = NULL;
292 unregister_sysctl_table(t->sysctl_header);
293 kfree(t);
294 }
295 }
296
297 static int dn_forwarding_proc(ctl_table *table, int write,
298 struct file *filep,
299 void __user *buffer,
300 size_t *lenp, loff_t *ppos)
301 {
302 #ifdef CONFIG_DECNET_ROUTER
303 struct net_device *dev = table->extra1;
304 struct dn_dev *dn_db;
305 int err;
306 int tmp, old;
307
308 if (table->extra1 == NULL)
309 return -EINVAL;
310
311 dn_db = dev->dn_ptr;
312 old = dn_db->parms.forwarding;
313
314 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
315
316 if ((err >= 0) && write) {
317 if (dn_db->parms.forwarding < 0)
318 dn_db->parms.forwarding = 0;
319 if (dn_db->parms.forwarding > 2)
320 dn_db->parms.forwarding = 2;
321 /*
322 * What an ugly hack this is... its works, just. It
323 * would be nice if sysctl/proc were just that little
324 * bit more flexible so I don't have to write a special
325 * routine, or suffer hacks like this - SJW
326 */
327 tmp = dn_db->parms.forwarding;
328 dn_db->parms.forwarding = old;
329 if (dn_db->parms.down)
330 dn_db->parms.down(dev);
331 dn_db->parms.forwarding = tmp;
332 if (dn_db->parms.up)
333 dn_db->parms.up(dev);
334 }
335
336 return err;
337 #else
338 return -EINVAL;
339 #endif
340 }
341
342 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
343 void __user *oldval, size_t __user *oldlenp,
344 void __user *newval, size_t newlen)
345 {
346 #ifdef CONFIG_DECNET_ROUTER
347 struct net_device *dev = table->extra1;
348 struct dn_dev *dn_db;
349 int value;
350
351 if (table->extra1 == NULL)
352 return -EINVAL;
353
354 dn_db = dev->dn_ptr;
355
356 if (newval && newlen) {
357 if (newlen != sizeof(int))
358 return -EINVAL;
359
360 if (get_user(value, (int __user *)newval))
361 return -EFAULT;
362 if (value < 0)
363 return -EINVAL;
364 if (value > 2)
365 return -EINVAL;
366
367 if (dn_db->parms.down)
368 dn_db->parms.down(dev);
369 dn_db->parms.forwarding = value;
370 if (dn_db->parms.up)
371 dn_db->parms.up(dev);
372 }
373
374 return 0;
375 #else
376 return -EINVAL;
377 #endif
378 }
379
380 #else /* CONFIG_SYSCTL */
381 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
382 {
383 }
384 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
385 {
386 }
387
388 #endif /* CONFIG_SYSCTL */
389
390 static inline __u16 mtu2blksize(struct net_device *dev)
391 {
392 u32 blksize = dev->mtu;
393 if (blksize > 0xffff)
394 blksize = 0xffff;
395
396 if (dev->type == ARPHRD_ETHER ||
397 dev->type == ARPHRD_PPP ||
398 dev->type == ARPHRD_IPGRE ||
399 dev->type == ARPHRD_LOOPBACK)
400 blksize -= 2;
401
402 return (__u16)blksize;
403 }
404
405 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
406 {
407 struct dn_ifaddr *ifa;
408
409 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
410
411 return ifa;
412 }
413
414 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
415 {
416 kfree(ifa);
417 }
418
419 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
420 {
421 struct dn_ifaddr *ifa1 = *ifap;
422 unsigned char mac_addr[6];
423 struct net_device *dev = dn_db->dev;
424
425 ASSERT_RTNL();
426
427 *ifap = ifa1->ifa_next;
428
429 if (dn_db->dev->type == ARPHRD_ETHER) {
430 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
431 dn_dn2eth(mac_addr, ifa1->ifa_local);
432 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
433 }
434 }
435
436 dn_ifaddr_notify(RTM_DELADDR, ifa1);
437 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
438 if (destroy) {
439 dn_dev_free_ifa(ifa1);
440
441 if (dn_db->ifa_list == NULL)
442 dn_dev_delete(dn_db->dev);
443 }
444 }
445
446 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
447 {
448 struct net_device *dev = dn_db->dev;
449 struct dn_ifaddr *ifa1;
450 unsigned char mac_addr[6];
451
452 ASSERT_RTNL();
453
454 /* Check for duplicates */
455 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
456 if (ifa1->ifa_local == ifa->ifa_local)
457 return -EEXIST;
458 }
459
460 if (dev->type == ARPHRD_ETHER) {
461 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
462 dn_dn2eth(mac_addr, ifa->ifa_local);
463 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
464 }
465 }
466
467 ifa->ifa_next = dn_db->ifa_list;
468 dn_db->ifa_list = ifa;
469
470 dn_ifaddr_notify(RTM_NEWADDR, ifa);
471 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
472
473 return 0;
474 }
475
476 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
477 {
478 struct dn_dev *dn_db = dev->dn_ptr;
479 int rv;
480
481 if (dn_db == NULL) {
482 int err;
483 dn_db = dn_dev_create(dev, &err);
484 if (dn_db == NULL)
485 return err;
486 }
487
488 ifa->ifa_dev = dn_db;
489
490 if (dev->flags & IFF_LOOPBACK)
491 ifa->ifa_scope = RT_SCOPE_HOST;
492
493 rv = dn_dev_insert_ifa(dn_db, ifa);
494 if (rv)
495 dn_dev_free_ifa(ifa);
496 return rv;
497 }
498
499
500 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
501 {
502 char buffer[DN_IFREQ_SIZE];
503 struct ifreq *ifr = (struct ifreq *)buffer;
504 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
505 struct dn_dev *dn_db;
506 struct net_device *dev;
507 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
508 int ret = 0;
509
510 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
511 return -EFAULT;
512 ifr->ifr_name[IFNAMSIZ-1] = 0;
513
514 #ifdef CONFIG_KMOD
515 dev_load(ifr->ifr_name);
516 #endif
517
518 switch(cmd) {
519 case SIOCGIFADDR:
520 break;
521 case SIOCSIFADDR:
522 if (!capable(CAP_NET_ADMIN))
523 return -EACCES;
524 if (sdn->sdn_family != AF_DECnet)
525 return -EINVAL;
526 break;
527 default:
528 return -EINVAL;
529 }
530
531 rtnl_lock();
532
533 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
534 ret = -ENODEV;
535 goto done;
536 }
537
538 if ((dn_db = dev->dn_ptr) != NULL) {
539 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
540 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
541 break;
542 }
543
544 if (ifa == NULL && cmd != SIOCSIFADDR) {
545 ret = -EADDRNOTAVAIL;
546 goto done;
547 }
548
549 switch(cmd) {
550 case SIOCGIFADDR:
551 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
552 goto rarok;
553
554 case SIOCSIFADDR:
555 if (!ifa) {
556 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
557 ret = -ENOBUFS;
558 break;
559 }
560 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
561 } else {
562 if (ifa->ifa_local == dn_saddr2dn(sdn))
563 break;
564 dn_dev_del_ifa(dn_db, ifap, 0);
565 }
566
567 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
568
569 ret = dn_dev_set_ifa(dev, ifa);
570 }
571 done:
572 rtnl_unlock();
573
574 return ret;
575 rarok:
576 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
577 ret = -EFAULT;
578 goto done;
579 }
580
581 struct net_device *dn_dev_get_default(void)
582 {
583 struct net_device *dev;
584 read_lock(&dndev_lock);
585 dev = decnet_default_device;
586 if (dev) {
587 if (dev->dn_ptr)
588 dev_hold(dev);
589 else
590 dev = NULL;
591 }
592 read_unlock(&dndev_lock);
593 return dev;
594 }
595
596 int dn_dev_set_default(struct net_device *dev, int force)
597 {
598 struct net_device *old = NULL;
599 int rv = -EBUSY;
600 if (!dev->dn_ptr)
601 return -ENODEV;
602 write_lock(&dndev_lock);
603 if (force || decnet_default_device == NULL) {
604 old = decnet_default_device;
605 decnet_default_device = dev;
606 rv = 0;
607 }
608 write_unlock(&dndev_lock);
609 if (old)
610 dev_put(old);
611 return rv;
612 }
613
614 static void dn_dev_check_default(struct net_device *dev)
615 {
616 write_lock(&dndev_lock);
617 if (dev == decnet_default_device) {
618 decnet_default_device = NULL;
619 } else {
620 dev = NULL;
621 }
622 write_unlock(&dndev_lock);
623 if (dev)
624 dev_put(dev);
625 }
626
627 static struct dn_dev *dn_dev_by_index(int ifindex)
628 {
629 struct net_device *dev;
630 struct dn_dev *dn_dev = NULL;
631 dev = dev_get_by_index(ifindex);
632 if (dev) {
633 dn_dev = dev->dn_ptr;
634 dev_put(dev);
635 }
636
637 return dn_dev;
638 }
639
640 static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
641 [IFA_ADDRESS] = { .type = NLA_U16 },
642 [IFA_LOCAL] = { .type = NLA_U16 },
643 [IFA_LABEL] = { .type = NLA_STRING,
644 .len = IFNAMSIZ - 1 },
645 };
646
647 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
648 {
649 struct nlattr *tb[IFA_MAX+1];
650 struct dn_dev *dn_db;
651 struct ifaddrmsg *ifm;
652 struct dn_ifaddr *ifa, **ifap;
653 int err = -EADDRNOTAVAIL;
654
655 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
656 if (err < 0)
657 goto errout;
658
659 ifm = nlmsg_data(nlh);
660 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
661 goto errout;
662
663 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
664 if (tb[IFA_LOCAL] &&
665 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
666 continue;
667
668 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
669 continue;
670
671 dn_dev_del_ifa(dn_db, ifap, 1);
672 return 0;
673 }
674
675 errout:
676 return err;
677 }
678
679 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
680 {
681 struct nlattr *tb[IFA_MAX+1];
682 struct net_device *dev;
683 struct dn_dev *dn_db;
684 struct ifaddrmsg *ifm;
685 struct dn_ifaddr *ifa;
686 int err;
687
688 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
689 if (err < 0)
690 return err;
691
692 if (tb[IFA_LOCAL] == NULL)
693 return -EINVAL;
694
695 ifm = nlmsg_data(nlh);
696 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
697 return -ENODEV;
698
699 if ((dn_db = dev->dn_ptr) == NULL) {
700 int err;
701 dn_db = dn_dev_create(dev, &err);
702 if (!dn_db)
703 return err;
704 }
705
706 if ((ifa = dn_dev_alloc_ifa()) == NULL)
707 return -ENOBUFS;
708
709 if (tb[IFA_ADDRESS] == NULL)
710 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
711
712 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
713 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
714 ifa->ifa_flags = ifm->ifa_flags;
715 ifa->ifa_scope = ifm->ifa_scope;
716 ifa->ifa_dev = dn_db;
717
718 if (tb[IFA_LABEL])
719 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
720 else
721 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
722
723 err = dn_dev_insert_ifa(dn_db, ifa);
724 if (err)
725 dn_dev_free_ifa(ifa);
726
727 return err;
728 }
729
730 static inline size_t dn_ifaddr_nlmsg_size(void)
731 {
732 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
733 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
734 + nla_total_size(2) /* IFA_ADDRESS */
735 + nla_total_size(2); /* IFA_LOCAL */
736 }
737
738 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
739 u32 pid, u32 seq, int event, unsigned int flags)
740 {
741 struct ifaddrmsg *ifm;
742 struct nlmsghdr *nlh;
743
744 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
745 if (nlh == NULL)
746 return -EMSGSIZE;
747
748 ifm = nlmsg_data(nlh);
749 ifm->ifa_family = AF_DECnet;
750 ifm->ifa_prefixlen = 16;
751 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
752 ifm->ifa_scope = ifa->ifa_scope;
753 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
754
755 if (ifa->ifa_address)
756 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
757 if (ifa->ifa_local)
758 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
759 if (ifa->ifa_label[0])
760 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
761
762 return nlmsg_end(skb, nlh);
763
764 nla_put_failure:
765 nlmsg_cancel(skb, nlh);
766 return -EMSGSIZE;
767 }
768
769 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
770 {
771 struct sk_buff *skb;
772 int err = -ENOBUFS;
773
774 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
775 if (skb == NULL)
776 goto errout;
777
778 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
779 if (err < 0) {
780 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
781 WARN_ON(err == -EMSGSIZE);
782 kfree_skb(skb);
783 goto errout;
784 }
785 err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
786 errout:
787 if (err < 0)
788 rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err);
789 }
790
791 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
792 {
793 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
794 struct net_device *dev;
795 struct dn_dev *dn_db;
796 struct dn_ifaddr *ifa;
797
798 skip_ndevs = cb->args[0];
799 skip_naddr = cb->args[1];
800
801 idx = 0;
802 for_each_netdev(dev) {
803 if (idx < skip_ndevs)
804 goto cont;
805 else if (idx > skip_ndevs) {
806 /* Only skip over addresses for first dev dumped
807 * in this iteration (idx == skip_ndevs) */
808 skip_naddr = 0;
809 }
810
811 if ((dn_db = dev->dn_ptr) == NULL)
812 goto cont;
813
814 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
815 ifa = ifa->ifa_next, dn_idx++) {
816 if (dn_idx < skip_naddr)
817 goto cont;
818
819 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
820 cb->nlh->nlmsg_seq, RTM_NEWADDR,
821 NLM_F_MULTI) < 0)
822 goto done;
823 }
824 cont:
825 idx++;
826 }
827 done:
828 cb->args[0] = idx;
829 cb->args[1] = dn_idx;
830
831 return skb->len;
832 }
833
834 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
835 {
836 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
837 struct dn_ifaddr *ifa;
838 int rv = -ENODEV;
839 if (dn_db == NULL)
840 goto out;
841 ifa = dn_db->ifa_list;
842 if (ifa != NULL) {
843 *addr = ifa->ifa_local;
844 rv = 0;
845 }
846 out:
847 return rv;
848 }
849
850 /*
851 * Find a default address to bind to.
852 *
853 * This is one of those areas where the initial VMS concepts don't really
854 * map onto the Linux concepts, and since we introduced multiple addresses
855 * per interface we have to cope with slightly odd ways of finding out what
856 * "our address" really is. Mostly it's not a problem; for this we just guess
857 * a sensible default. Eventually the routing code will take care of all the
858 * nasties for us I hope.
859 */
860 int dn_dev_bind_default(__le16 *addr)
861 {
862 struct net_device *dev;
863 int rv;
864 dev = dn_dev_get_default();
865 last_chance:
866 if (dev) {
867 read_lock(&dev_base_lock);
868 rv = dn_dev_get_first(dev, addr);
869 read_unlock(&dev_base_lock);
870 dev_put(dev);
871 if (rv == 0 || dev == &loopback_dev)
872 return rv;
873 }
874 dev = &loopback_dev;
875 dev_hold(dev);
876 goto last_chance;
877 }
878
879 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
880 {
881 struct endnode_hello_message *msg;
882 struct sk_buff *skb = NULL;
883 __le16 *pktlen;
884 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
885
886 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
887 return;
888
889 skb->dev = dev;
890
891 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
892
893 msg->msgflg = 0x0D;
894 memcpy(msg->tiver, dn_eco_version, 3);
895 dn_dn2eth(msg->id, ifa->ifa_local);
896 msg->iinfo = DN_RT_INFO_ENDN;
897 msg->blksize = dn_htons(mtu2blksize(dev));
898 msg->area = 0x00;
899 memset(msg->seed, 0, 8);
900 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
901
902 if (dn_db->router) {
903 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
904 dn_dn2eth(msg->neighbor, dn->addr);
905 }
906
907 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
908 msg->mpd = 0x00;
909 msg->datalen = 0x02;
910 memset(msg->data, 0xAA, 2);
911
912 pktlen = (__le16 *)skb_push(skb,2);
913 *pktlen = dn_htons(skb->len - 2);
914
915 skb_reset_network_header(skb);
916
917 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
918 }
919
920
921 #define DRDELAY (5 * HZ)
922
923 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
924 {
925 /* First check time since device went up */
926 if ((jiffies - dn_db->uptime) < DRDELAY)
927 return 0;
928
929 /* If there is no router, then yes... */
930 if (!dn_db->router)
931 return 1;
932
933 /* otherwise only if we have a higher priority or.. */
934 if (dn->priority < dn_db->parms.priority)
935 return 1;
936
937 /* if we have equal priority and a higher node number */
938 if (dn->priority != dn_db->parms.priority)
939 return 0;
940
941 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
942 return 1;
943
944 return 0;
945 }
946
947 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
948 {
949 int n;
950 struct dn_dev *dn_db = dev->dn_ptr;
951 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
952 struct sk_buff *skb;
953 size_t size;
954 unsigned char *ptr;
955 unsigned char *i1, *i2;
956 __le16 *pktlen;
957 char *src;
958
959 if (mtu2blksize(dev) < (26 + 7))
960 return;
961
962 n = mtu2blksize(dev) - 26;
963 n /= 7;
964
965 if (n > 32)
966 n = 32;
967
968 size = 2 + 26 + 7 * n;
969
970 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
971 return;
972
973 skb->dev = dev;
974 ptr = skb_put(skb, size);
975
976 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
977 *ptr++ = 2; /* ECO */
978 *ptr++ = 0;
979 *ptr++ = 0;
980 dn_dn2eth(ptr, ifa->ifa_local);
981 src = ptr;
982 ptr += ETH_ALEN;
983 *ptr++ = dn_db->parms.forwarding == 1 ?
984 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
985 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
986 ptr += 2;
987 *ptr++ = dn_db->parms.priority; /* Priority */
988 *ptr++ = 0; /* Area: Reserved */
989 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
990 ptr += 2;
991 *ptr++ = 0; /* MPD: Reserved */
992 i1 = ptr++;
993 memset(ptr, 0, 7); /* Name: Reserved */
994 ptr += 7;
995 i2 = ptr++;
996
997 n = dn_neigh_elist(dev, ptr, n);
998
999 *i2 = 7 * n;
1000 *i1 = 8 + *i2;
1001
1002 skb_trim(skb, (27 + *i2));
1003
1004 pktlen = (__le16 *)skb_push(skb, 2);
1005 *pktlen = dn_htons(skb->len - 2);
1006
1007 skb_reset_network_header(skb);
1008
1009 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1010 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1011 if (skb2) {
1012 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1013 }
1014 }
1015
1016 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1017 }
1018
1019 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1020 {
1021 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1022
1023 if (dn_db->parms.forwarding == 0)
1024 dn_send_endnode_hello(dev, ifa);
1025 else
1026 dn_send_router_hello(dev, ifa);
1027 }
1028
1029 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1030 {
1031 int tdlen = 16;
1032 int size = dev->hard_header_len + 2 + 4 + tdlen;
1033 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1034 int i;
1035 unsigned char *ptr;
1036 char src[ETH_ALEN];
1037
1038 if (skb == NULL)
1039 return ;
1040
1041 skb->dev = dev;
1042 skb_push(skb, dev->hard_header_len);
1043 ptr = skb_put(skb, 2 + 4 + tdlen);
1044
1045 *ptr++ = DN_RT_PKT_HELO;
1046 *((__le16 *)ptr) = ifa->ifa_local;
1047 ptr += 2;
1048 *ptr++ = tdlen;
1049
1050 for(i = 0; i < tdlen; i++)
1051 *ptr++ = 0252;
1052
1053 dn_dn2eth(src, ifa->ifa_local);
1054 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1055 }
1056
1057 static int dn_eth_up(struct net_device *dev)
1058 {
1059 struct dn_dev *dn_db = dev->dn_ptr;
1060
1061 if (dn_db->parms.forwarding == 0)
1062 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1063 else
1064 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1065
1066 dn_db->use_long = 1;
1067
1068 return 0;
1069 }
1070
1071 static void dn_eth_down(struct net_device *dev)
1072 {
1073 struct dn_dev *dn_db = dev->dn_ptr;
1074
1075 if (dn_db->parms.forwarding == 0)
1076 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1077 else
1078 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1079 }
1080
1081 static void dn_dev_set_timer(struct net_device *dev);
1082
1083 static void dn_dev_timer_func(unsigned long arg)
1084 {
1085 struct net_device *dev = (struct net_device *)arg;
1086 struct dn_dev *dn_db = dev->dn_ptr;
1087 struct dn_ifaddr *ifa;
1088
1089 if (dn_db->t3 <= dn_db->parms.t2) {
1090 if (dn_db->parms.timer3) {
1091 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1092 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1093 dn_db->parms.timer3(dev, ifa);
1094 }
1095 }
1096 dn_db->t3 = dn_db->parms.t3;
1097 } else {
1098 dn_db->t3 -= dn_db->parms.t2;
1099 }
1100
1101 dn_dev_set_timer(dev);
1102 }
1103
1104 static void dn_dev_set_timer(struct net_device *dev)
1105 {
1106 struct dn_dev *dn_db = dev->dn_ptr;
1107
1108 if (dn_db->parms.t2 > dn_db->parms.t3)
1109 dn_db->parms.t2 = dn_db->parms.t3;
1110
1111 dn_db->timer.data = (unsigned long)dev;
1112 dn_db->timer.function = dn_dev_timer_func;
1113 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1114
1115 add_timer(&dn_db->timer);
1116 }
1117
1118 struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1119 {
1120 int i;
1121 struct dn_dev_parms *p = dn_dev_list;
1122 struct dn_dev *dn_db;
1123
1124 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1125 if (p->type == dev->type)
1126 break;
1127 }
1128
1129 *err = -ENODEV;
1130 if (i == DN_DEV_LIST_SIZE)
1131 return NULL;
1132
1133 *err = -ENOBUFS;
1134 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1135 return NULL;
1136
1137 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1138 smp_wmb();
1139 dev->dn_ptr = dn_db;
1140 dn_db->dev = dev;
1141 init_timer(&dn_db->timer);
1142
1143 dn_db->uptime = jiffies;
1144
1145 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1146 if (!dn_db->neigh_parms) {
1147 dev->dn_ptr = NULL;
1148 kfree(dn_db);
1149 return NULL;
1150 }
1151
1152 if (dn_db->parms.up) {
1153 if (dn_db->parms.up(dev) < 0) {
1154 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1155 dev->dn_ptr = NULL;
1156 kfree(dn_db);
1157 return NULL;
1158 }
1159 }
1160
1161 dn_dev_sysctl_register(dev, &dn_db->parms);
1162
1163 dn_dev_set_timer(dev);
1164
1165 *err = 0;
1166 return dn_db;
1167 }
1168
1169
1170 /*
1171 * This processes a device up event. We only start up
1172 * the loopback device & ethernet devices with correct
1173 * MAC addreses automatically. Others must be started
1174 * specifically.
1175 *
1176 * FIXME: How should we configure the loopback address ? If we could dispense
1177 * with using decnet_address here and for autobind, it will be one less thing
1178 * for users to worry about setting up.
1179 */
1180
1181 void dn_dev_up(struct net_device *dev)
1182 {
1183 struct dn_ifaddr *ifa;
1184 __le16 addr = decnet_address;
1185 int maybe_default = 0;
1186 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1187
1188 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1189 return;
1190
1191 /*
1192 * Need to ensure that loopback device has a dn_db attached to it
1193 * to allow creation of neighbours against it, even though it might
1194 * not have a local address of its own. Might as well do the same for
1195 * all autoconfigured interfaces.
1196 */
1197 if (dn_db == NULL) {
1198 int err;
1199 dn_db = dn_dev_create(dev, &err);
1200 if (dn_db == NULL)
1201 return;
1202 }
1203
1204 if (dev->type == ARPHRD_ETHER) {
1205 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1206 return;
1207 addr = dn_eth2dn(dev->dev_addr);
1208 maybe_default = 1;
1209 }
1210
1211 if (addr == 0)
1212 return;
1213
1214 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1215 return;
1216
1217 ifa->ifa_local = ifa->ifa_address = addr;
1218 ifa->ifa_flags = 0;
1219 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1220 strcpy(ifa->ifa_label, dev->name);
1221
1222 dn_dev_set_ifa(dev, ifa);
1223
1224 /*
1225 * Automagically set the default device to the first automatically
1226 * configured ethernet card in the system.
1227 */
1228 if (maybe_default) {
1229 dev_hold(dev);
1230 if (dn_dev_set_default(dev, 0))
1231 dev_put(dev);
1232 }
1233 }
1234
1235 static void dn_dev_delete(struct net_device *dev)
1236 {
1237 struct dn_dev *dn_db = dev->dn_ptr;
1238
1239 if (dn_db == NULL)
1240 return;
1241
1242 del_timer_sync(&dn_db->timer);
1243 dn_dev_sysctl_unregister(&dn_db->parms);
1244 dn_dev_check_default(dev);
1245 neigh_ifdown(&dn_neigh_table, dev);
1246
1247 if (dn_db->parms.down)
1248 dn_db->parms.down(dev);
1249
1250 dev->dn_ptr = NULL;
1251
1252 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1253 neigh_ifdown(&dn_neigh_table, dev);
1254
1255 if (dn_db->router)
1256 neigh_release(dn_db->router);
1257 if (dn_db->peer)
1258 neigh_release(dn_db->peer);
1259
1260 kfree(dn_db);
1261 }
1262
1263 void dn_dev_down(struct net_device *dev)
1264 {
1265 struct dn_dev *dn_db = dev->dn_ptr;
1266 struct dn_ifaddr *ifa;
1267
1268 if (dn_db == NULL)
1269 return;
1270
1271 while((ifa = dn_db->ifa_list) != NULL) {
1272 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1273 dn_dev_free_ifa(ifa);
1274 }
1275
1276 dn_dev_delete(dev);
1277 }
1278
1279 void dn_dev_init_pkt(struct sk_buff *skb)
1280 {
1281 return;
1282 }
1283
1284 void dn_dev_veri_pkt(struct sk_buff *skb)
1285 {
1286 return;
1287 }
1288
1289 void dn_dev_hello(struct sk_buff *skb)
1290 {
1291 return;
1292 }
1293
1294 void dn_dev_devices_off(void)
1295 {
1296 struct net_device *dev;
1297
1298 rtnl_lock();
1299 for_each_netdev(dev)
1300 dn_dev_down(dev);
1301 rtnl_unlock();
1302
1303 }
1304
1305 void dn_dev_devices_on(void)
1306 {
1307 struct net_device *dev;
1308
1309 rtnl_lock();
1310 for_each_netdev(dev) {
1311 if (dev->flags & IFF_UP)
1312 dn_dev_up(dev);
1313 }
1314 rtnl_unlock();
1315 }
1316
1317 int register_dnaddr_notifier(struct notifier_block *nb)
1318 {
1319 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1320 }
1321
1322 int unregister_dnaddr_notifier(struct notifier_block *nb)
1323 {
1324 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1325 }
1326
1327 #ifdef CONFIG_PROC_FS
1328 static inline int is_dn_dev(struct net_device *dev)
1329 {
1330 return dev->dn_ptr != NULL;
1331 }
1332
1333 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1334 {
1335 int i;
1336 struct net_device *dev;
1337
1338 read_lock(&dev_base_lock);
1339
1340 if (*pos == 0)
1341 return SEQ_START_TOKEN;
1342
1343 i = 1;
1344 for_each_netdev(dev) {
1345 if (!is_dn_dev(dev))
1346 continue;
1347
1348 if (i++ == *pos)
1349 return dev;
1350 }
1351
1352 return NULL;
1353 }
1354
1355 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1356 {
1357 struct net_device *dev;
1358
1359 ++*pos;
1360
1361 dev = (struct net_device *)v;
1362 if (v == SEQ_START_TOKEN)
1363 dev = net_device_entry(&dev_base_head);
1364
1365 for_each_netdev_continue(dev) {
1366 if (!is_dn_dev(dev))
1367 continue;
1368
1369 return dev;
1370 }
1371
1372 return NULL;
1373 }
1374
1375 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1376 {
1377 read_unlock(&dev_base_lock);
1378 }
1379
1380 static char *dn_type2asc(char type)
1381 {
1382 switch(type) {
1383 case DN_DEV_BCAST:
1384 return "B";
1385 case DN_DEV_UCAST:
1386 return "U";
1387 case DN_DEV_MPOINT:
1388 return "M";
1389 }
1390
1391 return "?";
1392 }
1393
1394 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1395 {
1396 if (v == SEQ_START_TOKEN)
1397 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1398 else {
1399 struct net_device *dev = v;
1400 char peer_buf[DN_ASCBUF_LEN];
1401 char router_buf[DN_ASCBUF_LEN];
1402 struct dn_dev *dn_db = dev->dn_ptr;
1403
1404 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1405 " %04hu %03d %02x %-10s %-7s %-7s\n",
1406 dev->name ? dev->name : "???",
1407 dn_type2asc(dn_db->parms.mode),
1408 0, 0,
1409 dn_db->t3, dn_db->parms.t3,
1410 mtu2blksize(dev),
1411 dn_db->parms.priority,
1412 dn_db->parms.state, dn_db->parms.name,
1413 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1414 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1415 }
1416 return 0;
1417 }
1418
1419 static const struct seq_operations dn_dev_seq_ops = {
1420 .start = dn_dev_seq_start,
1421 .next = dn_dev_seq_next,
1422 .stop = dn_dev_seq_stop,
1423 .show = dn_dev_seq_show,
1424 };
1425
1426 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1427 {
1428 return seq_open(file, &dn_dev_seq_ops);
1429 }
1430
1431 static const struct file_operations dn_dev_seq_fops = {
1432 .owner = THIS_MODULE,
1433 .open = dn_dev_seq_open,
1434 .read = seq_read,
1435 .llseek = seq_lseek,
1436 .release = seq_release,
1437 };
1438
1439 #endif /* CONFIG_PROC_FS */
1440
1441 static int __initdata addr[2];
1442 module_param_array(addr, int, NULL, 0444);
1443 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1444
1445 void __init dn_dev_init(void)
1446 {
1447 if (addr[0] > 63 || addr[0] < 0) {
1448 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1449 return;
1450 }
1451
1452 if (addr[1] > 1023 || addr[1] < 0) {
1453 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1454 return;
1455 }
1456
1457 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1458
1459 dn_dev_devices_on();
1460
1461 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1462 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1463 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1464
1465 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1466
1467 #ifdef CONFIG_SYSCTL
1468 {
1469 int i;
1470 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1471 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1472 }
1473 #endif /* CONFIG_SYSCTL */
1474 }
1475
1476 void __exit dn_dev_cleanup(void)
1477 {
1478 #ifdef CONFIG_SYSCTL
1479 {
1480 int i;
1481 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1482 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1483 }
1484 #endif /* CONFIG_SYSCTL */
1485
1486 proc_net_remove("decnet_dev");
1487
1488 dn_dev_devices_off();
1489 }
WRT350N Kernel Patches