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initial commit with v2.6.9
[linux-2.6.9-moxart.git] / net / decnet / dn_dev.c
bloba21a326808b45865c3b368beff027009a005fbfa
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/config.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_arp.h>
38 #include <linux/if_ether.h>
39 #include <linux/skbuff.h>
40 #include <linux/rtnetlink.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/dn.h>
49 #include <net/dn_dev.h>
50 #include <net/dn_route.h>
51 #include <net/dn_neigh.h>
52 #include <net/dn_fib.h>
53
54 #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
55
56 static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
57 static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
58 static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
59 static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
60
61 extern struct neigh_table dn_neigh_table;
62
63 /*
64 * decnet_address is kept in network order.
65 */
66 dn_address decnet_address = 0;
67
68 static rwlock_t dndev_lock = RW_LOCK_UNLOCKED;
69 static struct net_device *decnet_default_device;
70 static struct notifier_block *dnaddr_chain;
71
72 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
73 static void dn_dev_delete(struct net_device *dev);
74 static void rtmsg_ifa(int event, struct dn_ifaddr *ifa);
75
76 static int dn_eth_up(struct net_device *);
77 static void dn_eth_down(struct net_device *);
78 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
79 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
80
81 static struct dn_dev_parms dn_dev_list[] = {
82 {
83 .type = ARPHRD_ETHER, /* Ethernet */
84 .mode = DN_DEV_BCAST,
85 .state = DN_DEV_S_RU,
86 .t2 = 1,
87 .t3 = 10,
88 .name = "ethernet",
89 .ctl_name = NET_DECNET_CONF_ETHER,
90 .up = dn_eth_up,
91 .down = dn_eth_down,
92 .timer3 = dn_send_brd_hello,
93 },
94 {
95 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
96 .mode = DN_DEV_BCAST,
97 .state = DN_DEV_S_RU,
98 .t2 = 1,
99 .t3 = 10,
100 .name = "ipgre",
101 .ctl_name = NET_DECNET_CONF_GRE,
102 .timer3 = dn_send_brd_hello,
103 },
104 #if 0
105 {
106 .type = ARPHRD_X25, /* Bog standard X.25 */
107 .mode = DN_DEV_UCAST,
108 .state = DN_DEV_S_DS,
109 .t2 = 1,
110 .t3 = 120,
111 .name = "x25",
112 .ctl_name = NET_DECNET_CONF_X25,
113 .timer3 = dn_send_ptp_hello,
114 },
115 #endif
116 #if 0
117 {
118 .type = ARPHRD_PPP, /* DECnet over PPP */
119 .mode = DN_DEV_BCAST,
120 .state = DN_DEV_S_RU,
121 .t2 = 1,
122 .t3 = 10,
123 .name = "ppp",
124 .ctl_name = NET_DECNET_CONF_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 .ctl_name = NET_DECNET_CONF_DDCMP,
136 .timer3 = dn_send_ptp_hello,
137 },
138 {
139 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
140 .mode = DN_DEV_BCAST,
141 .state = DN_DEV_S_RU,
142 .t2 = 1,
143 .t3 = 10,
144 .name = "loopback",
145 .ctl_name = NET_DECNET_CONF_LOOPBACK,
146 .timer3 = dn_send_brd_hello,
147 }
148 };
149
150 #define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms))
151
152 #define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
153
154 #ifdef CONFIG_SYSCTL
155
156 static int min_t2[] = { 1 };
157 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
158 static int min_t3[] = { 1 };
159 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
160
161 static int min_priority[1];
162 static int max_priority[] = { 127 }; /* From DECnet spec */
163
164 static int dn_forwarding_proc(ctl_table *, int, struct file *,
165 void __user *, size_t *, loff_t *);
166 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
167 void __user *oldval, size_t __user *oldlenp,
168 void __user *newval, size_t newlen,
169 void **context);
170
171 static struct dn_dev_sysctl_table {
172 struct ctl_table_header *sysctl_header;
173 ctl_table dn_dev_vars[5];
174 ctl_table dn_dev_dev[2];
175 ctl_table dn_dev_conf_dir[2];
176 ctl_table dn_dev_proto_dir[2];
177 ctl_table dn_dev_root_dir[2];
178 } dn_dev_sysctl = {
179 NULL,
180 {
181 {
182 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
183 .procname = "forwarding",
184 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
185 .maxlen = sizeof(int),
186 .mode = 0644,
187 .proc_handler = dn_forwarding_proc,
188 .strategy = dn_forwarding_sysctl,
189 },
190 {
191 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
192 .procname = "priority",
193 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
194 .maxlen = sizeof(int),
195 .mode = 0644,
196 .proc_handler = proc_dointvec_minmax,
197 .strategy = sysctl_intvec,
198 .extra1 = &min_priority,
199 .extra2 = &max_priority
200 },
201 {
202 .ctl_name = NET_DECNET_CONF_DEV_T2,
203 .procname = "t2",
204 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
205 .maxlen = sizeof(int),
206 .mode = 0644,
207 .proc_handler = proc_dointvec_minmax,
208 .strategy = sysctl_intvec,
209 .extra1 = &min_t2,
210 .extra2 = &max_t2
211 },
212 {
213 .ctl_name = NET_DECNET_CONF_DEV_T3,
214 .procname = "t3",
215 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
216 .maxlen = sizeof(int),
217 .mode = 0644,
218 .proc_handler = proc_dointvec_minmax,
219 .strategy = sysctl_intvec,
220 .extra1 = &min_t3,
221 .extra2 = &max_t3
222 },
223 {0}
224 },
225 {{
226 .ctl_name = 0,
227 .procname = "",
228 .mode = 0555,
229 .child = dn_dev_sysctl.dn_dev_vars
230 }, {0}},
231 {{
232 .ctl_name = NET_DECNET_CONF,
233 .procname = "conf",
234 .mode = 0555,
235 .child = dn_dev_sysctl.dn_dev_dev
236 }, {0}},
237 {{
238 .ctl_name = NET_DECNET,
239 .procname = "decnet",
240 .mode = 0555,
241 .child = dn_dev_sysctl.dn_dev_conf_dir
242 }, {0}},
243 {{
244 .ctl_name = CTL_NET,
245 .procname = "net",
246 .mode = 0555,
247 .child = dn_dev_sysctl.dn_dev_proto_dir
248 }, {0}}
249 };
250
251 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
252 {
253 struct dn_dev_sysctl_table *t;
254 int i;
255
256 t = kmalloc(sizeof(*t), GFP_KERNEL);
257 if (t == NULL)
258 return;
259
260 memcpy(t, &dn_dev_sysctl, sizeof(*t));
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 t->dn_dev_vars[i].de = NULL;
266 }
267
268 if (dev) {
269 t->dn_dev_dev[0].procname = dev->name;
270 t->dn_dev_dev[0].ctl_name = dev->ifindex;
271 } else {
272 t->dn_dev_dev[0].procname = parms->name;
273 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
274 }
275
276 t->dn_dev_dev[0].child = t->dn_dev_vars;
277 t->dn_dev_dev[0].de = NULL;
278 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
279 t->dn_dev_conf_dir[0].de = NULL;
280 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
281 t->dn_dev_proto_dir[0].de = NULL;
282 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
283 t->dn_dev_root_dir[0].de = NULL;
284 t->dn_dev_vars[0].extra1 = (void *)dev;
285
286 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0);
287 if (t->sysctl_header == NULL)
288 kfree(t);
289 else
290 parms->sysctl = t;
291 }
292
293 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
294 {
295 if (parms->sysctl) {
296 struct dn_dev_sysctl_table *t = parms->sysctl;
297 parms->sysctl = NULL;
298 unregister_sysctl_table(t->sysctl_header);
299 kfree(t);
300 }
301 }
302
303 static int dn_forwarding_proc(ctl_table *table, int write,
304 struct file *filep,
305 void __user *buffer,
306 size_t *lenp, loff_t *ppos)
307 {
308 #ifdef CONFIG_DECNET_ROUTER
309 struct net_device *dev = table->extra1;
310 struct dn_dev *dn_db;
311 int err;
312 int tmp, old;
313
314 if (table->extra1 == NULL)
315 return -EINVAL;
316
317 dn_db = dev->dn_ptr;
318 old = dn_db->parms.forwarding;
319
320 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
321
322 if ((err >= 0) && write) {
323 if (dn_db->parms.forwarding < 0)
324 dn_db->parms.forwarding = 0;
325 if (dn_db->parms.forwarding > 2)
326 dn_db->parms.forwarding = 2;
327 /*
328 * What an ugly hack this is... its works, just. It
329 * would be nice if sysctl/proc were just that little
330 * bit more flexible so I don't have to write a special
331 * routine, or suffer hacks like this - SJW
332 */
333 tmp = dn_db->parms.forwarding;
334 dn_db->parms.forwarding = old;
335 if (dn_db->parms.down)
336 dn_db->parms.down(dev);
337 dn_db->parms.forwarding = tmp;
338 if (dn_db->parms.up)
339 dn_db->parms.up(dev);
340 }
341
342 return err;
343 #else
344 return -EINVAL;
345 #endif
346 }
347
348 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
349 void __user *oldval, size_t __user *oldlenp,
350 void __user *newval, size_t newlen,
351 void **context)
352 {
353 #ifdef CONFIG_DECNET_ROUTER
354 struct net_device *dev = table->extra1;
355 struct dn_dev *dn_db;
356 int value;
357
358 if (table->extra1 == NULL)
359 return -EINVAL;
360
361 dn_db = dev->dn_ptr;
362
363 if (newval && newlen) {
364 if (newlen != sizeof(int))
365 return -EINVAL;
366
367 if (get_user(value, (int __user *)newval))
368 return -EFAULT;
369 if (value < 0)
370 return -EINVAL;
371 if (value > 2)
372 return -EINVAL;
373
374 if (dn_db->parms.down)
375 dn_db->parms.down(dev);
376 dn_db->parms.forwarding = value;
377 if (dn_db->parms.up)
378 dn_db->parms.up(dev);
379 }
380
381 return 0;
382 #else
383 return -EINVAL;
384 #endif
385 }
386
387 #else /* CONFIG_SYSCTL */
388 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
389 {
390 }
391 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
392 {
393 }
394
395 #endif /* CONFIG_SYSCTL */
396
397 static inline __u16 mtu2blksize(struct net_device *dev)
398 {
399 u32 blksize = dev->mtu;
400 if (blksize > 0xffff)
401 blksize = 0xffff;
402
403 if (dev->type == ARPHRD_ETHER ||
404 dev->type == ARPHRD_PPP ||
405 dev->type == ARPHRD_IPGRE ||
406 dev->type == ARPHRD_LOOPBACK)
407 blksize -= 2;
408
409 return (__u16)blksize;
410 }
411
412 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
413 {
414 struct dn_ifaddr *ifa;
415
416 ifa = kmalloc(sizeof(*ifa), GFP_KERNEL);
417
418 if (ifa) {
419 memset(ifa, 0, sizeof(*ifa));
420 }
421
422 return ifa;
423 }
424
425 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
426 {
427 kfree(ifa);
428 }
429
430 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
431 {
432 struct dn_ifaddr *ifa1 = *ifap;
433 unsigned char mac_addr[6];
434 struct net_device *dev = dn_db->dev;
435
436 ASSERT_RTNL();
437
438 *ifap = ifa1->ifa_next;
439
440 if (dn_db->dev->type == ARPHRD_ETHER) {
441 if (ifa1->ifa_local != dn_htons(dn_eth2dn(dev->dev_addr))) {
442 dn_dn2eth(mac_addr, ifa1->ifa_local);
443 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
444 }
445 }
446
447 rtmsg_ifa(RTM_DELADDR, ifa1);
448 notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
449 if (destroy) {
450 dn_dev_free_ifa(ifa1);
451
452 if (dn_db->ifa_list == NULL)
453 dn_dev_delete(dn_db->dev);
454 }
455 }
456
457 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
458 {
459 struct net_device *dev = dn_db->dev;
460 struct dn_ifaddr *ifa1;
461 unsigned char mac_addr[6];
462
463 ASSERT_RTNL();
464
465 /* Check for duplicates */
466 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
467 if (ifa1->ifa_local == ifa->ifa_local)
468 return -EEXIST;
469 }
470
471 if (dev->type == ARPHRD_ETHER) {
472 if (ifa->ifa_local != dn_htons(dn_eth2dn(dev->dev_addr))) {
473 dn_dn2eth(mac_addr, ifa->ifa_local);
474 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
475 dev_mc_upload(dev);
476 }
477 }
478
479 ifa->ifa_next = dn_db->ifa_list;
480 dn_db->ifa_list = ifa;
481
482 rtmsg_ifa(RTM_NEWADDR, ifa);
483 notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
484
485 return 0;
486 }
487
488 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
489 {
490 struct dn_dev *dn_db = dev->dn_ptr;
491 int rv;
492
493 if (dn_db == NULL) {
494 int err;
495 dn_db = dn_dev_create(dev, &err);
496 if (dn_db == NULL)
497 return err;
498 }
499
500 ifa->ifa_dev = dn_db;
501
502 if (dev->flags & IFF_LOOPBACK)
503 ifa->ifa_scope = RT_SCOPE_HOST;
504
505 rv = dn_dev_insert_ifa(dn_db, ifa);
506 if (rv)
507 dn_dev_free_ifa(ifa);
508 return rv;
509 }
510
511
512 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
513 {
514 char buffer[DN_IFREQ_SIZE];
515 struct ifreq *ifr = (struct ifreq *)buffer;
516 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
517 struct dn_dev *dn_db;
518 struct net_device *dev;
519 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
520 int ret = 0;
521
522 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
523 return -EFAULT;
524 ifr->ifr_name[IFNAMSIZ-1] = 0;
525
526 #ifdef CONFIG_KMOD
527 dev_load(ifr->ifr_name);
528 #endif
529
530 switch(cmd) {
531 case SIOCGIFADDR:
532 break;
533 case SIOCSIFADDR:
534 if (!capable(CAP_NET_ADMIN))
535 return -EACCES;
536 if (sdn->sdn_family != AF_DECnet)
537 return -EINVAL;
538 break;
539 default:
540 return -EINVAL;
541 }
542
543 rtnl_lock();
544
545 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
546 ret = -ENODEV;
547 goto done;
548 }
549
550 if ((dn_db = dev->dn_ptr) != NULL) {
551 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
552 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
553 break;
554 }
555
556 if (ifa == NULL && cmd != SIOCSIFADDR) {
557 ret = -EADDRNOTAVAIL;
558 goto done;
559 }
560
561 switch(cmd) {
562 case SIOCGIFADDR:
563 *((dn_address *)sdn->sdn_nodeaddr) = ifa->ifa_local;
564 goto rarok;
565
566 case SIOCSIFADDR:
567 if (!ifa) {
568 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
569 ret = -ENOBUFS;
570 break;
571 }
572 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
573 } else {
574 if (ifa->ifa_local == dn_saddr2dn(sdn))
575 break;
576 dn_dev_del_ifa(dn_db, ifap, 0);
577 }
578
579 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
580
581 ret = dn_dev_set_ifa(dev, ifa);
582 }
583 done:
584 rtnl_unlock();
585
586 return ret;
587 rarok:
588 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
589 ret = -EFAULT;
590 goto done;
591 }
592
593 struct net_device *dn_dev_get_default(void)
594 {
595 struct net_device *dev;
596 read_lock(&dndev_lock);
597 dev = decnet_default_device;
598 if (dev) {
599 if (dev->dn_ptr)
600 dev_hold(dev);
601 else
602 dev = NULL;
603 }
604 read_unlock(&dndev_lock);
605 return dev;
606 }
607
608 int dn_dev_set_default(struct net_device *dev, int force)
609 {
610 struct net_device *old = NULL;
611 int rv = -EBUSY;
612 if (!dev->dn_ptr)
613 return -ENODEV;
614 write_lock(&dndev_lock);
615 if (force || decnet_default_device == NULL) {
616 old = decnet_default_device;
617 decnet_default_device = dev;
618 rv = 0;
619 }
620 write_unlock(&dndev_lock);
621 if (old)
622 dev_put(dev);
623 return rv;
624 }
625
626 static void dn_dev_check_default(struct net_device *dev)
627 {
628 write_lock(&dndev_lock);
629 if (dev == decnet_default_device) {
630 decnet_default_device = NULL;
631 } else {
632 dev = NULL;
633 }
634 write_unlock(&dndev_lock);
635 if (dev)
636 dev_put(dev);
637 }
638
639 static struct dn_dev *dn_dev_by_index(int ifindex)
640 {
641 struct net_device *dev;
642 struct dn_dev *dn_dev = NULL;
643 dev = dev_get_by_index(ifindex);
644 if (dev) {
645 dn_dev = dev->dn_ptr;
646 dev_put(dev);
647 }
648
649 return dn_dev;
650 }
651
652 static int dn_dev_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
653 {
654 struct rtattr **rta = arg;
655 struct dn_dev *dn_db;
656 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
657 struct dn_ifaddr *ifa, **ifap;
658
659 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
660 return -EADDRNOTAVAIL;
661
662 for(ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) {
663 void *tmp = rta[IFA_LOCAL-1];
664 if ((tmp && memcmp(RTA_DATA(tmp), &ifa->ifa_local, 2)) ||
665 (rta[IFA_LABEL-1] && strcmp(RTA_DATA(rta[IFA_LABEL-1]), ifa->ifa_label)))
666 continue;
667
668 dn_dev_del_ifa(dn_db, ifap, 1);
669 return 0;
670 }
671
672 return -EADDRNOTAVAIL;
673 }
674
675 static int dn_dev_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
676 {
677 struct rtattr **rta = arg;
678 struct net_device *dev;
679 struct dn_dev *dn_db;
680 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
681 struct dn_ifaddr *ifa;
682 int rv;
683
684 if (rta[IFA_LOCAL-1] == NULL)
685 return -EINVAL;
686
687 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
688 return -ENODEV;
689
690 if ((dn_db = dev->dn_ptr) == NULL) {
691 int err;
692 dn_db = dn_dev_create(dev, &err);
693 if (!dn_db)
694 return err;
695 }
696
697 if ((ifa = dn_dev_alloc_ifa()) == NULL)
698 return -ENOBUFS;
699
700 if (!rta[IFA_ADDRESS - 1])
701 rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1];
702 memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL-1]), 2);
703 memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS-1]), 2);
704 ifa->ifa_flags = ifm->ifa_flags;
705 ifa->ifa_scope = ifm->ifa_scope;
706 ifa->ifa_dev = dn_db;
707 if (rta[IFA_LABEL-1])
708 memcpy(ifa->ifa_label, RTA_DATA(rta[IFA_LABEL-1]), IFNAMSIZ);
709 else
710 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
711
712 rv = dn_dev_insert_ifa(dn_db, ifa);
713 if (rv)
714 dn_dev_free_ifa(ifa);
715 return rv;
716 }
717
718 static int dn_dev_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
719 u32 pid, u32 seq, int event)
720 {
721 struct ifaddrmsg *ifm;
722 struct nlmsghdr *nlh;
723 unsigned char *b = skb->tail;
724
725 nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
726 ifm = NLMSG_DATA(nlh);
727
728 ifm->ifa_family = AF_DECnet;
729 ifm->ifa_prefixlen = 16;
730 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
731 ifm->ifa_scope = ifa->ifa_scope;
732 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
733 if (ifa->ifa_address)
734 RTA_PUT(skb, IFA_ADDRESS, 2, &ifa->ifa_address);
735 if (ifa->ifa_local)
736 RTA_PUT(skb, IFA_LOCAL, 2, &ifa->ifa_local);
737 if (ifa->ifa_label[0])
738 RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label);
739 nlh->nlmsg_len = skb->tail - b;
740 return skb->len;
741
742 nlmsg_failure:
743 rtattr_failure:
744 skb_trim(skb, b - skb->data);
745 return -1;
746 }
747
748 static void rtmsg_ifa(int event, struct dn_ifaddr *ifa)
749 {
750 struct sk_buff *skb;
751 int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
752
753 skb = alloc_skb(size, GFP_KERNEL);
754 if (!skb) {
755 netlink_set_err(rtnl, 0, RTMGRP_DECnet_IFADDR, ENOBUFS);
756 return;
757 }
758 if (dn_dev_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
759 kfree_skb(skb);
760 netlink_set_err(rtnl, 0, RTMGRP_DECnet_IFADDR, EINVAL);
761 return;
762 }
763 NETLINK_CB(skb).dst_groups = RTMGRP_DECnet_IFADDR;
764 netlink_broadcast(rtnl, skb, 0, RTMGRP_DECnet_IFADDR, GFP_KERNEL);
765 }
766
767 static int dn_dev_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
768 {
769 int idx, dn_idx;
770 int s_idx, s_dn_idx;
771 struct net_device *dev;
772 struct dn_dev *dn_db;
773 struct dn_ifaddr *ifa;
774
775 s_idx = cb->args[0];
776 s_dn_idx = dn_idx = cb->args[1];
777 read_lock(&dev_base_lock);
778 for(dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
779 if (idx < s_idx)
780 continue;
781 if (idx > s_idx)
782 s_dn_idx = 0;
783 if ((dn_db = dev->dn_ptr) == NULL)
784 continue;
785
786 for(ifa = dn_db->ifa_list, dn_idx = 0; ifa; ifa = ifa->ifa_next, dn_idx++) {
787 if (dn_idx < s_dn_idx)
788 continue;
789
790 if (dn_dev_fill_ifaddr(skb, ifa,
791 NETLINK_CB(cb->skb).pid,
792 cb->nlh->nlmsg_seq,
793 RTM_NEWADDR) <= 0)
794 goto done;
795 }
796 }
797 done:
798 read_unlock(&dev_base_lock);
799 cb->args[0] = idx;
800 cb->args[1] = dn_idx;
801
802 return skb->len;
803 }
804
805 static int dn_dev_get_first(struct net_device *dev, dn_address *addr)
806 {
807 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
808 struct dn_ifaddr *ifa;
809 int rv = -ENODEV;
810 if (dn_db == NULL)
811 goto out;
812 ifa = dn_db->ifa_list;
813 if (ifa != NULL) {
814 *addr = ifa->ifa_local;
815 rv = 0;
816 }
817 out:
818 return rv;
819 }
820
821 /*
822 * Find a default address to bind to.
823 *
824 * This is one of those areas where the initial VMS concepts don't really
825 * map onto the Linux concepts, and since we introduced multiple addresses
826 * per interface we have to cope with slightly odd ways of finding out what
827 * "our address" really is. Mostly it's not a problem; for this we just guess
828 * a sensible default. Eventually the routing code will take care of all the
829 * nasties for us I hope.
830 */
831 int dn_dev_bind_default(dn_address *addr)
832 {
833 struct net_device *dev;
834 int rv;
835 dev = dn_dev_get_default();
836 last_chance:
837 if (dev) {
838 read_lock(&dev_base_lock);
839 rv = dn_dev_get_first(dev, addr);
840 read_unlock(&dev_base_lock);
841 dev_put(dev);
842 if (rv == 0 || dev == &loopback_dev)
843 return rv;
844 }
845 dev = &loopback_dev;
846 dev_hold(dev);
847 goto last_chance;
848 }
849
850 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
851 {
852 struct endnode_hello_message *msg;
853 struct sk_buff *skb = NULL;
854 unsigned short int *pktlen;
855 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
856
857 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
858 return;
859
860 skb->dev = dev;
861
862 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
863
864 msg->msgflg = 0x0D;
865 memcpy(msg->tiver, dn_eco_version, 3);
866 dn_dn2eth(msg->id, ifa->ifa_local);
867 msg->iinfo = DN_RT_INFO_ENDN;
868 msg->blksize = dn_htons(mtu2blksize(dev));
869 msg->area = 0x00;
870 memset(msg->seed, 0, 8);
871 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
872
873 if (dn_db->router) {
874 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
875 dn_dn2eth(msg->neighbor, dn->addr);
876 }
877
878 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
879 msg->mpd = 0x00;
880 msg->datalen = 0x02;
881 memset(msg->data, 0xAA, 2);
882
883 pktlen = (unsigned short *)skb_push(skb,2);
884 *pktlen = dn_htons(skb->len - 2);
885
886 skb->nh.raw = skb->data;
887
888 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
889 }
890
891
892 #define DRDELAY (5 * HZ)
893
894 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
895 {
896 /* First check time since device went up */
897 if ((jiffies - dn_db->uptime) < DRDELAY)
898 return 0;
899
900 /* If there is no router, then yes... */
901 if (!dn_db->router)
902 return 1;
903
904 /* otherwise only if we have a higher priority or.. */
905 if (dn->priority < dn_db->parms.priority)
906 return 1;
907
908 /* if we have equal priority and a higher node number */
909 if (dn->priority != dn_db->parms.priority)
910 return 0;
911
912 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
913 return 1;
914
915 return 0;
916 }
917
918 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
919 {
920 int n;
921 struct dn_dev *dn_db = dev->dn_ptr;
922 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
923 struct sk_buff *skb;
924 size_t size;
925 unsigned char *ptr;
926 unsigned char *i1, *i2;
927 unsigned short *pktlen;
928 char *src;
929
930 if (mtu2blksize(dev) < (26 + 7))
931 return;
932
933 n = mtu2blksize(dev) - 26;
934 n /= 7;
935
936 if (n > 32)
937 n = 32;
938
939 size = 2 + 26 + 7 * n;
940
941 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
942 return;
943
944 skb->dev = dev;
945 ptr = skb_put(skb, size);
946
947 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
948 *ptr++ = 2; /* ECO */
949 *ptr++ = 0;
950 *ptr++ = 0;
951 dn_dn2eth(ptr, ifa->ifa_local);
952 src = ptr;
953 ptr += ETH_ALEN;
954 *ptr++ = dn_db->parms.forwarding == 1 ?
955 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
956 *((unsigned short *)ptr) = dn_htons(mtu2blksize(dev));
957 ptr += 2;
958 *ptr++ = dn_db->parms.priority; /* Priority */
959 *ptr++ = 0; /* Area: Reserved */
960 *((unsigned short *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
961 ptr += 2;
962 *ptr++ = 0; /* MPD: Reserved */
963 i1 = ptr++;
964 memset(ptr, 0, 7); /* Name: Reserved */
965 ptr += 7;
966 i2 = ptr++;
967
968 n = dn_neigh_elist(dev, ptr, n);
969
970 *i2 = 7 * n;
971 *i1 = 8 + *i2;
972
973 skb_trim(skb, (27 + *i2));
974
975 pktlen = (unsigned short *)skb_push(skb, 2);
976 *pktlen = dn_htons(skb->len - 2);
977
978 skb->nh.raw = skb->data;
979
980 if (dn_am_i_a_router(dn, dn_db, ifa)) {
981 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
982 if (skb2) {
983 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
984 }
985 }
986
987 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
988 }
989
990 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
991 {
992 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
993
994 if (dn_db->parms.forwarding == 0)
995 dn_send_endnode_hello(dev, ifa);
996 else
997 dn_send_router_hello(dev, ifa);
998 }
999
1000 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1001 {
1002 int tdlen = 16;
1003 int size = dev->hard_header_len + 2 + 4 + tdlen;
1004 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1005 int i;
1006 unsigned char *ptr;
1007 char src[ETH_ALEN];
1008
1009 if (skb == NULL)
1010 return ;
1011
1012 skb->dev = dev;
1013 skb_push(skb, dev->hard_header_len);
1014 ptr = skb_put(skb, 2 + 4 + tdlen);
1015
1016 *ptr++ = DN_RT_PKT_HELO;
1017 *((dn_address *)ptr) = ifa->ifa_local;
1018 ptr += 2;
1019 *ptr++ = tdlen;
1020
1021 for(i = 0; i < tdlen; i++)
1022 *ptr++ = 0252;
1023
1024 dn_dn2eth(src, ifa->ifa_local);
1025 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1026 }
1027
1028 static int dn_eth_up(struct net_device *dev)
1029 {
1030 struct dn_dev *dn_db = dev->dn_ptr;
1031
1032 if (dn_db->parms.forwarding == 0)
1033 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1034 else
1035 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1036
1037 dev_mc_upload(dev);
1038
1039 dn_db->use_long = 1;
1040
1041 return 0;
1042 }
1043
1044 static void dn_eth_down(struct net_device *dev)
1045 {
1046 struct dn_dev *dn_db = dev->dn_ptr;
1047
1048 if (dn_db->parms.forwarding == 0)
1049 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1050 else
1051 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1052 }
1053
1054 static void dn_dev_set_timer(struct net_device *dev);
1055
1056 static void dn_dev_timer_func(unsigned long arg)
1057 {
1058 struct net_device *dev = (struct net_device *)arg;
1059 struct dn_dev *dn_db = dev->dn_ptr;
1060 struct dn_ifaddr *ifa;
1061
1062 if (dn_db->t3 <= dn_db->parms.t2) {
1063 if (dn_db->parms.timer3) {
1064 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1065 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1066 dn_db->parms.timer3(dev, ifa);
1067 }
1068 }
1069 dn_db->t3 = dn_db->parms.t3;
1070 } else {
1071 dn_db->t3 -= dn_db->parms.t2;
1072 }
1073
1074 dn_dev_set_timer(dev);
1075 }
1076
1077 static void dn_dev_set_timer(struct net_device *dev)
1078 {
1079 struct dn_dev *dn_db = dev->dn_ptr;
1080
1081 if (dn_db->parms.t2 > dn_db->parms.t3)
1082 dn_db->parms.t2 = dn_db->parms.t3;
1083
1084 dn_db->timer.data = (unsigned long)dev;
1085 dn_db->timer.function = dn_dev_timer_func;
1086 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1087
1088 add_timer(&dn_db->timer);
1089 }
1090
1091 struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1092 {
1093 int i;
1094 struct dn_dev_parms *p = dn_dev_list;
1095 struct dn_dev *dn_db;
1096
1097 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1098 if (p->type == dev->type)
1099 break;
1100 }
1101
1102 *err = -ENODEV;
1103 if (i == DN_DEV_LIST_SIZE)
1104 return NULL;
1105
1106 *err = -ENOBUFS;
1107 if ((dn_db = kmalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1108 return NULL;
1109
1110 memset(dn_db, 0, sizeof(struct dn_dev));
1111 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1112 smp_wmb();
1113 dev->dn_ptr = dn_db;
1114 dn_db->dev = dev;
1115 init_timer(&dn_db->timer);
1116
1117 dn_db->uptime = jiffies;
1118 if (dn_db->parms.up) {
1119 if (dn_db->parms.up(dev) < 0) {
1120 dev->dn_ptr = NULL;
1121 kfree(dn_db);
1122 return NULL;
1123 }
1124 }
1125
1126 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1127
1128 dn_dev_sysctl_register(dev, &dn_db->parms);
1129
1130 dn_dev_set_timer(dev);
1131
1132 *err = 0;
1133 return dn_db;
1134 }
1135
1136
1137 /*
1138 * This processes a device up event. We only start up
1139 * the loopback device & ethernet devices with correct
1140 * MAC addreses automatically. Others must be started
1141 * specifically.
1142 *
1143 * FIXME: How should we configure the loopback address ? If we could dispense
1144 * with using decnet_address here and for autobind, it will be one less thing
1145 * for users to worry about setting up.
1146 */
1147
1148 void dn_dev_up(struct net_device *dev)
1149 {
1150 struct dn_ifaddr *ifa;
1151 dn_address addr = decnet_address;
1152 int maybe_default = 0;
1153 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1154
1155 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1156 return;
1157
1158 /*
1159 * Need to ensure that loopback device has a dn_db attached to it
1160 * to allow creation of neighbours against it, even though it might
1161 * not have a local address of its own. Might as well do the same for
1162 * all autoconfigured interfaces.
1163 */
1164 if (dn_db == NULL) {
1165 int err;
1166 dn_db = dn_dev_create(dev, &err);
1167 if (dn_db == NULL)
1168 return;
1169 }
1170
1171 if (dev->type == ARPHRD_ETHER) {
1172 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1173 return;
1174 addr = dn_htons(dn_eth2dn(dev->dev_addr));
1175 maybe_default = 1;
1176 }
1177
1178 if (addr == 0)
1179 return;
1180
1181 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1182 return;
1183
1184 ifa->ifa_local = ifa->ifa_address = addr;
1185 ifa->ifa_flags = 0;
1186 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1187 strcpy(ifa->ifa_label, dev->name);
1188
1189 dn_dev_set_ifa(dev, ifa);
1190
1191 /*
1192 * Automagically set the default device to the first automatically
1193 * configured ethernet card in the system.
1194 */
1195 if (maybe_default) {
1196 dev_hold(dev);
1197 if (dn_dev_set_default(dev, 0))
1198 dev_put(dev);
1199 }
1200 }
1201
1202 static void dn_dev_delete(struct net_device *dev)
1203 {
1204 struct dn_dev *dn_db = dev->dn_ptr;
1205
1206 if (dn_db == NULL)
1207 return;
1208
1209 del_timer_sync(&dn_db->timer);
1210 dn_dev_sysctl_unregister(&dn_db->parms);
1211 dn_dev_check_default(dev);
1212 neigh_ifdown(&dn_neigh_table, dev);
1213
1214 if (dn_db->parms.down)
1215 dn_db->parms.down(dev);
1216
1217 dev->dn_ptr = NULL;
1218
1219 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1220 neigh_ifdown(&dn_neigh_table, dev);
1221
1222 if (dn_db->router)
1223 neigh_release(dn_db->router);
1224 if (dn_db->peer)
1225 neigh_release(dn_db->peer);
1226
1227 kfree(dn_db);
1228 }
1229
1230 void dn_dev_down(struct net_device *dev)
1231 {
1232 struct dn_dev *dn_db = dev->dn_ptr;
1233 struct dn_ifaddr *ifa;
1234
1235 if (dn_db == NULL)
1236 return;
1237
1238 while((ifa = dn_db->ifa_list) != NULL) {
1239 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1240 dn_dev_free_ifa(ifa);
1241 }
1242
1243 dn_dev_delete(dev);
1244 }
1245
1246 void dn_dev_init_pkt(struct sk_buff *skb)
1247 {
1248 return;
1249 }
1250
1251 void dn_dev_veri_pkt(struct sk_buff *skb)
1252 {
1253 return;
1254 }
1255
1256 void dn_dev_hello(struct sk_buff *skb)
1257 {
1258 return;
1259 }
1260
1261 void dn_dev_devices_off(void)
1262 {
1263 struct net_device *dev;
1264
1265 rtnl_lock();
1266 for(dev = dev_base; dev; dev = dev->next)
1267 dn_dev_down(dev);
1268 rtnl_unlock();
1269
1270 }
1271
1272 void dn_dev_devices_on(void)
1273 {
1274 struct net_device *dev;
1275
1276 rtnl_lock();
1277 for(dev = dev_base; dev; dev = dev->next) {
1278 if (dev->flags & IFF_UP)
1279 dn_dev_up(dev);
1280 }
1281 rtnl_unlock();
1282 }
1283
1284 int register_dnaddr_notifier(struct notifier_block *nb)
1285 {
1286 return notifier_chain_register(&dnaddr_chain, nb);
1287 }
1288
1289 int unregister_dnaddr_notifier(struct notifier_block *nb)
1290 {
1291 return notifier_chain_unregister(&dnaddr_chain, nb);
1292 }
1293
1294 #ifdef CONFIG_DECNET_SIOCGIFCONF
1295 /*
1296 * Now we support multiple addresses per interface.
1297 * Since we don't want to break existing code, you have to enable
1298 * it as a compile time option. Probably you should use the
1299 * rtnetlink interface instead.
1300 */
1301 int dnet_gifconf(struct net_device *dev, char __user *buf, int len)
1302 {
1303 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1304 struct dn_ifaddr *ifa;
1305 char buffer[DN_IFREQ_SIZE];
1306 struct ifreq *ifr = (struct ifreq *)buffer;
1307 struct sockaddr_dn *addr = (struct sockaddr_dn *)&ifr->ifr_addr;
1308 int done = 0;
1309
1310 if ((dn_db == NULL) || ((ifa = dn_db->ifa_list) == NULL))
1311 return 0;
1312
1313 for(; ifa; ifa = ifa->ifa_next) {
1314 if (!buf) {
1315 done += sizeof(DN_IFREQ_SIZE);
1316 continue;
1317 }
1318 if (len < DN_IFREQ_SIZE)
1319 return done;
1320 memset(buffer, 0, DN_IFREQ_SIZE);
1321
1322 if (ifa->ifa_label)
1323 strcpy(ifr->ifr_name, ifa->ifa_label);
1324 else
1325 strcpy(ifr->ifr_name, dev->name);
1326
1327 addr->sdn_family = AF_DECnet;
1328 addr->sdn_add.a_len = 2;
1329 memcpy(addr->sdn_add.a_addr, &ifa->ifa_local,
1330 sizeof(dn_address));
1331
1332 if (copy_to_user(buf, buffer, DN_IFREQ_SIZE)) {
1333 done = -EFAULT;
1334 break;
1335 }
1336
1337 buf += DN_IFREQ_SIZE;
1338 len -= DN_IFREQ_SIZE;
1339 done += DN_IFREQ_SIZE;
1340 }
1341
1342 return done;
1343 }
1344 #endif /* CONFIG_DECNET_SIOCGIFCONF */
1345
1346
1347 #ifdef CONFIG_PROC_FS
1348 static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev)
1349 {
1350 do {
1351 dev = dev->next;
1352 } while(dev && !dev->dn_ptr);
1353
1354 return dev;
1355 }
1356
1357 static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos)
1358 {
1359 struct net_device *dev;
1360
1361 dev = dev_base;
1362 if (dev && !dev->dn_ptr)
1363 dev = dn_dev_get_next(seq, dev);
1364 if (pos) {
1365 while(dev && (dev = dn_dev_get_next(seq, dev)))
1366 --pos;
1367 }
1368 return dev;
1369 }
1370
1371 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1372 {
1373 if (*pos) {
1374 struct net_device *dev;
1375 read_lock(&dev_base_lock);
1376 dev = dn_dev_get_idx(seq, *pos - 1);
1377 if (dev == NULL)
1378 read_unlock(&dev_base_lock);
1379 return dev;
1380 }
1381 return SEQ_START_TOKEN;
1382 }
1383
1384 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1385 {
1386 struct net_device *dev = v;
1387 loff_t one = 1;
1388
1389 if (v == SEQ_START_TOKEN) {
1390 dev = dn_dev_seq_start(seq, &one);
1391 } else {
1392 dev = dn_dev_get_next(seq, dev);
1393 if (dev == NULL)
1394 read_unlock(&dev_base_lock);
1395 }
1396 ++*pos;
1397 return dev;
1398 }
1399
1400 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1401 {
1402 if (v && v != SEQ_START_TOKEN)
1403 read_unlock(&dev_base_lock);
1404 }
1405
1406 static char *dn_type2asc(char type)
1407 {
1408 switch(type) {
1409 case DN_DEV_BCAST:
1410 return "B";
1411 case DN_DEV_UCAST:
1412 return "U";
1413 case DN_DEV_MPOINT:
1414 return "M";
1415 }
1416
1417 return "?";
1418 }
1419
1420 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1421 {
1422 if (v == SEQ_START_TOKEN)
1423 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1424 else {
1425 struct net_device *dev = v;
1426 char peer_buf[DN_ASCBUF_LEN];
1427 char router_buf[DN_ASCBUF_LEN];
1428 struct dn_dev *dn_db = dev->dn_ptr;
1429
1430 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1431 " %04hu %03d %02x %-10s %-7s %-7s\n",
1432 dev->name ? dev->name : "???",
1433 dn_type2asc(dn_db->parms.mode),
1434 0, 0,
1435 dn_db->t3, dn_db->parms.t3,
1436 mtu2blksize(dev),
1437 dn_db->parms.priority,
1438 dn_db->parms.state, dn_db->parms.name,
1439 dn_db->router ? dn_addr2asc(dn_ntohs(*(dn_address *)dn_db->router->primary_key), router_buf) : "",
1440 dn_db->peer ? dn_addr2asc(dn_ntohs(*(dn_address *)dn_db->peer->primary_key), peer_buf) : "");
1441 }
1442 return 0;
1443 }
1444
1445 static struct seq_operations dn_dev_seq_ops = {
1446 .start = dn_dev_seq_start,
1447 .next = dn_dev_seq_next,
1448 .stop = dn_dev_seq_stop,
1449 .show = dn_dev_seq_show,
1450 };
1451
1452 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1453 {
1454 return seq_open(file, &dn_dev_seq_ops);
1455 }
1456
1457 static struct file_operations dn_dev_seq_fops = {
1458 .owner = THIS_MODULE,
1459 .open = dn_dev_seq_open,
1460 .read = seq_read,
1461 .llseek = seq_lseek,
1462 .release = seq_release,
1463 };
1464
1465 #endif /* CONFIG_PROC_FS */
1466
1467 static struct rtnetlink_link dnet_rtnetlink_table[RTM_MAX-RTM_BASE+1] =
1468 {
1469 [4] = { .doit = dn_dev_rtm_newaddr, },
1470 [5] = { .doit = dn_dev_rtm_deladdr, },
1471 [6] = { .dumpit = dn_dev_dump_ifaddr, },
1472
1473 #ifdef CONFIG_DECNET_ROUTER
1474 [8] = { .doit = dn_fib_rtm_newroute, },
1475 [9] = { .doit = dn_fib_rtm_delroute, },
1476 [10] = { .doit = dn_cache_getroute, .dumpit = dn_fib_dump, },
1477 [16] = { .doit = dn_fib_rtm_newrule, },
1478 [17] = { .doit = dn_fib_rtm_delrule, },
1479 [18] = { .dumpit = dn_fib_dump_rules, },
1480 #else
1481 [10] = { .doit = dn_cache_getroute, .dumpit = dn_cache_dump, },
1482 #endif
1483
1484 };
1485
1486 static int __initdata addr[2];
1487 static int __initdata num;
1488 module_param_array(addr, int, num, 0444);
1489 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1490
1491 void __init dn_dev_init(void)
1492 {
1493 if (addr[0] > 63 || addr[0] < 0) {
1494 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1495 return;
1496 }
1497
1498 if (addr[1] > 1023 || addr[1] < 0) {
1499 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1500 return;
1501 }
1502
1503 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1504
1505 dn_dev_devices_on();
1506 #ifdef CONFIG_DECNET_SIOCGIFCONF
1507 register_gifconf(PF_DECnet, dnet_gifconf);
1508 #endif /* CONFIG_DECNET_SIOCGIFCONF */
1509
1510 rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table;
1511
1512 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1513
1514 #ifdef CONFIG_SYSCTL
1515 {
1516 int i;
1517 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1518 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1519 }
1520 #endif /* CONFIG_SYSCTL */
1521 }
1522
1523 void __exit dn_dev_cleanup(void)
1524 {
1525 rtnetlink_links[PF_DECnet] = NULL;
1526
1527 #ifdef CONFIG_DECNET_SIOCGIFCONF
1528 unregister_gifconf(PF_DECnet);
1529 #endif /* CONFIG_DECNET_SIOCGIFCONF */
1530
1531 #ifdef CONFIG_SYSCTL
1532 {
1533 int i;
1534 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1535 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1536 }
1537 #endif /* CONFIG_SYSCTL */
1538
1539 proc_net_remove("decnet_dev");
1540
1541 dn_dev_devices_off();
1542 }
MOXA 2.6.9 from sdlinux-moxaart.tgz