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[PATCH] sysctl: remove unused "context" param
[mirror_ubuntu-bionic-kernel.git] / net / decnet / dn_dev.c
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 t->dn_dev_vars[i].de = NULL;
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_dev[0].de = NULL;
277 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
278 t->dn_dev_conf_dir[0].de = NULL;
279 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
280 t->dn_dev_proto_dir[0].de = NULL;
281 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
282 t->dn_dev_root_dir[0].de = NULL;
283 t->dn_dev_vars[0].extra1 = (void *)dev;
284
285 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0);
286 if (t->sysctl_header == NULL)
287 kfree(t);
288 else
289 parms->sysctl = t;
290 }
291
292 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
293 {
294 if (parms->sysctl) {
295 struct dn_dev_sysctl_table *t = parms->sysctl;
296 parms->sysctl = NULL;
297 unregister_sysctl_table(t->sysctl_header);
298 kfree(t);
299 }
300 }
301
302 static int dn_forwarding_proc(ctl_table *table, int write,
303 struct file *filep,
304 void __user *buffer,
305 size_t *lenp, loff_t *ppos)
306 {
307 #ifdef CONFIG_DECNET_ROUTER
308 struct net_device *dev = table->extra1;
309 struct dn_dev *dn_db;
310 int err;
311 int tmp, old;
312
313 if (table->extra1 == NULL)
314 return -EINVAL;
315
316 dn_db = dev->dn_ptr;
317 old = dn_db->parms.forwarding;
318
319 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
320
321 if ((err >= 0) && write) {
322 if (dn_db->parms.forwarding < 0)
323 dn_db->parms.forwarding = 0;
324 if (dn_db->parms.forwarding > 2)
325 dn_db->parms.forwarding = 2;
326 /*
327 * What an ugly hack this is... its works, just. It
328 * would be nice if sysctl/proc were just that little
329 * bit more flexible so I don't have to write a special
330 * routine, or suffer hacks like this - SJW
331 */
332 tmp = dn_db->parms.forwarding;
333 dn_db->parms.forwarding = old;
334 if (dn_db->parms.down)
335 dn_db->parms.down(dev);
336 dn_db->parms.forwarding = tmp;
337 if (dn_db->parms.up)
338 dn_db->parms.up(dev);
339 }
340
341 return err;
342 #else
343 return -EINVAL;
344 #endif
345 }
346
347 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
348 void __user *oldval, size_t __user *oldlenp,
349 void __user *newval, size_t newlen)
350 {
351 #ifdef CONFIG_DECNET_ROUTER
352 struct net_device *dev = table->extra1;
353 struct dn_dev *dn_db;
354 int value;
355
356 if (table->extra1 == NULL)
357 return -EINVAL;
358
359 dn_db = dev->dn_ptr;
360
361 if (newval && newlen) {
362 if (newlen != sizeof(int))
363 return -EINVAL;
364
365 if (get_user(value, (int __user *)newval))
366 return -EFAULT;
367 if (value < 0)
368 return -EINVAL;
369 if (value > 2)
370 return -EINVAL;
371
372 if (dn_db->parms.down)
373 dn_db->parms.down(dev);
374 dn_db->parms.forwarding = value;
375 if (dn_db->parms.up)
376 dn_db->parms.up(dev);
377 }
378
379 return 0;
380 #else
381 return -EINVAL;
382 #endif
383 }
384
385 #else /* CONFIG_SYSCTL */
386 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
387 {
388 }
389 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
390 {
391 }
392
393 #endif /* CONFIG_SYSCTL */
394
395 static inline __u16 mtu2blksize(struct net_device *dev)
396 {
397 u32 blksize = dev->mtu;
398 if (blksize > 0xffff)
399 blksize = 0xffff;
400
401 if (dev->type == ARPHRD_ETHER ||
402 dev->type == ARPHRD_PPP ||
403 dev->type == ARPHRD_IPGRE ||
404 dev->type == ARPHRD_LOOPBACK)
405 blksize -= 2;
406
407 return (__u16)blksize;
408 }
409
410 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
411 {
412 struct dn_ifaddr *ifa;
413
414 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
415
416 return ifa;
417 }
418
419 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
420 {
421 kfree(ifa);
422 }
423
424 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
425 {
426 struct dn_ifaddr *ifa1 = *ifap;
427 unsigned char mac_addr[6];
428 struct net_device *dev = dn_db->dev;
429
430 ASSERT_RTNL();
431
432 *ifap = ifa1->ifa_next;
433
434 if (dn_db->dev->type == ARPHRD_ETHER) {
435 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
436 dn_dn2eth(mac_addr, ifa1->ifa_local);
437 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
438 }
439 }
440
441 dn_ifaddr_notify(RTM_DELADDR, ifa1);
442 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
443 if (destroy) {
444 dn_dev_free_ifa(ifa1);
445
446 if (dn_db->ifa_list == NULL)
447 dn_dev_delete(dn_db->dev);
448 }
449 }
450
451 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
452 {
453 struct net_device *dev = dn_db->dev;
454 struct dn_ifaddr *ifa1;
455 unsigned char mac_addr[6];
456
457 ASSERT_RTNL();
458
459 /* Check for duplicates */
460 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
461 if (ifa1->ifa_local == ifa->ifa_local)
462 return -EEXIST;
463 }
464
465 if (dev->type == ARPHRD_ETHER) {
466 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
467 dn_dn2eth(mac_addr, ifa->ifa_local);
468 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
469 dev_mc_upload(dev);
470 }
471 }
472
473 ifa->ifa_next = dn_db->ifa_list;
474 dn_db->ifa_list = ifa;
475
476 dn_ifaddr_notify(RTM_NEWADDR, ifa);
477 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
478
479 return 0;
480 }
481
482 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
483 {
484 struct dn_dev *dn_db = dev->dn_ptr;
485 int rv;
486
487 if (dn_db == NULL) {
488 int err;
489 dn_db = dn_dev_create(dev, &err);
490 if (dn_db == NULL)
491 return err;
492 }
493
494 ifa->ifa_dev = dn_db;
495
496 if (dev->flags & IFF_LOOPBACK)
497 ifa->ifa_scope = RT_SCOPE_HOST;
498
499 rv = dn_dev_insert_ifa(dn_db, ifa);
500 if (rv)
501 dn_dev_free_ifa(ifa);
502 return rv;
503 }
504
505
506 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
507 {
508 char buffer[DN_IFREQ_SIZE];
509 struct ifreq *ifr = (struct ifreq *)buffer;
510 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
511 struct dn_dev *dn_db;
512 struct net_device *dev;
513 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
514 int ret = 0;
515
516 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
517 return -EFAULT;
518 ifr->ifr_name[IFNAMSIZ-1] = 0;
519
520 #ifdef CONFIG_KMOD
521 dev_load(ifr->ifr_name);
522 #endif
523
524 switch(cmd) {
525 case SIOCGIFADDR:
526 break;
527 case SIOCSIFADDR:
528 if (!capable(CAP_NET_ADMIN))
529 return -EACCES;
530 if (sdn->sdn_family != AF_DECnet)
531 return -EINVAL;
532 break;
533 default:
534 return -EINVAL;
535 }
536
537 rtnl_lock();
538
539 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
540 ret = -ENODEV;
541 goto done;
542 }
543
544 if ((dn_db = dev->dn_ptr) != NULL) {
545 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
546 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
547 break;
548 }
549
550 if (ifa == NULL && cmd != SIOCSIFADDR) {
551 ret = -EADDRNOTAVAIL;
552 goto done;
553 }
554
555 switch(cmd) {
556 case SIOCGIFADDR:
557 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
558 goto rarok;
559
560 case SIOCSIFADDR:
561 if (!ifa) {
562 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
563 ret = -ENOBUFS;
564 break;
565 }
566 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
567 } else {
568 if (ifa->ifa_local == dn_saddr2dn(sdn))
569 break;
570 dn_dev_del_ifa(dn_db, ifap, 0);
571 }
572
573 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
574
575 ret = dn_dev_set_ifa(dev, ifa);
576 }
577 done:
578 rtnl_unlock();
579
580 return ret;
581 rarok:
582 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
583 ret = -EFAULT;
584 goto done;
585 }
586
587 struct net_device *dn_dev_get_default(void)
588 {
589 struct net_device *dev;
590 read_lock(&dndev_lock);
591 dev = decnet_default_device;
592 if (dev) {
593 if (dev->dn_ptr)
594 dev_hold(dev);
595 else
596 dev = NULL;
597 }
598 read_unlock(&dndev_lock);
599 return dev;
600 }
601
602 int dn_dev_set_default(struct net_device *dev, int force)
603 {
604 struct net_device *old = NULL;
605 int rv = -EBUSY;
606 if (!dev->dn_ptr)
607 return -ENODEV;
608 write_lock(&dndev_lock);
609 if (force || decnet_default_device == NULL) {
610 old = decnet_default_device;
611 decnet_default_device = dev;
612 rv = 0;
613 }
614 write_unlock(&dndev_lock);
615 if (old)
616 dev_put(old);
617 return rv;
618 }
619
620 static void dn_dev_check_default(struct net_device *dev)
621 {
622 write_lock(&dndev_lock);
623 if (dev == decnet_default_device) {
624 decnet_default_device = NULL;
625 } else {
626 dev = NULL;
627 }
628 write_unlock(&dndev_lock);
629 if (dev)
630 dev_put(dev);
631 }
632
633 static struct dn_dev *dn_dev_by_index(int ifindex)
634 {
635 struct net_device *dev;
636 struct dn_dev *dn_dev = NULL;
637 dev = dev_get_by_index(ifindex);
638 if (dev) {
639 dn_dev = dev->dn_ptr;
640 dev_put(dev);
641 }
642
643 return dn_dev;
644 }
645
646 static struct nla_policy dn_ifa_policy[IFA_MAX+1] __read_mostly = {
647 [IFA_ADDRESS] = { .type = NLA_U16 },
648 [IFA_LOCAL] = { .type = NLA_U16 },
649 [IFA_LABEL] = { .type = NLA_STRING,
650 .len = IFNAMSIZ - 1 },
651 };
652
653 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
654 {
655 struct nlattr *tb[IFA_MAX+1];
656 struct dn_dev *dn_db;
657 struct ifaddrmsg *ifm;
658 struct dn_ifaddr *ifa, **ifap;
659 int err = -EADDRNOTAVAIL;
660
661 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
662 if (err < 0)
663 goto errout;
664
665 ifm = nlmsg_data(nlh);
666 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
667 goto errout;
668
669 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
670 if (tb[IFA_LOCAL] &&
671 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
672 continue;
673
674 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
675 continue;
676
677 dn_dev_del_ifa(dn_db, ifap, 1);
678 return 0;
679 }
680
681 errout:
682 return err;
683 }
684
685 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
686 {
687 struct nlattr *tb[IFA_MAX+1];
688 struct net_device *dev;
689 struct dn_dev *dn_db;
690 struct ifaddrmsg *ifm;
691 struct dn_ifaddr *ifa;
692 int err;
693
694 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
695 if (err < 0)
696 return err;
697
698 if (tb[IFA_LOCAL] == NULL)
699 return -EINVAL;
700
701 ifm = nlmsg_data(nlh);
702 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
703 return -ENODEV;
704
705 if ((dn_db = dev->dn_ptr) == NULL) {
706 int err;
707 dn_db = dn_dev_create(dev, &err);
708 if (!dn_db)
709 return err;
710 }
711
712 if ((ifa = dn_dev_alloc_ifa()) == NULL)
713 return -ENOBUFS;
714
715 if (tb[IFA_ADDRESS] == NULL)
716 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
717
718 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
719 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
720 ifa->ifa_flags = ifm->ifa_flags;
721 ifa->ifa_scope = ifm->ifa_scope;
722 ifa->ifa_dev = dn_db;
723
724 if (tb[IFA_LABEL])
725 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
726 else
727 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
728
729 err = dn_dev_insert_ifa(dn_db, ifa);
730 if (err)
731 dn_dev_free_ifa(ifa);
732
733 return err;
734 }
735
736 static inline size_t dn_ifaddr_nlmsg_size(void)
737 {
738 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
739 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
740 + nla_total_size(2) /* IFA_ADDRESS */
741 + nla_total_size(2); /* IFA_LOCAL */
742 }
743
744 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
745 u32 pid, u32 seq, int event, unsigned int flags)
746 {
747 struct ifaddrmsg *ifm;
748 struct nlmsghdr *nlh;
749
750 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
751 if (nlh == NULL)
752 return -ENOBUFS;
753
754 ifm = nlmsg_data(nlh);
755 ifm->ifa_family = AF_DECnet;
756 ifm->ifa_prefixlen = 16;
757 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
758 ifm->ifa_scope = ifa->ifa_scope;
759 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
760
761 if (ifa->ifa_address)
762 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
763 if (ifa->ifa_local)
764 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
765 if (ifa->ifa_label[0])
766 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
767
768 return nlmsg_end(skb, nlh);
769
770 nla_put_failure:
771 return nlmsg_cancel(skb, nlh);
772 }
773
774 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
775 {
776 struct sk_buff *skb;
777 int err = -ENOBUFS;
778
779 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
780 if (skb == NULL)
781 goto errout;
782
783 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
784 /* failure implies BUG in dn_ifaddr_nlmsg_size() */
785 BUG_ON(err < 0);
786
787 err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
788 errout:
789 if (err < 0)
790 rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err);
791 }
792
793 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
794 {
795 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
796 struct net_device *dev;
797 struct dn_dev *dn_db;
798 struct dn_ifaddr *ifa;
799
800 skip_ndevs = cb->args[0];
801 skip_naddr = cb->args[1];
802
803 read_lock(&dev_base_lock);
804 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
805 if (idx < skip_ndevs)
806 continue;
807 else if (idx > skip_ndevs) {
808 /* Only skip over addresses for first dev dumped
809 * in this iteration (idx == skip_ndevs) */
810 skip_naddr = 0;
811 }
812
813 if ((dn_db = dev->dn_ptr) == NULL)
814 continue;
815
816 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
817 ifa = ifa->ifa_next, dn_idx++) {
818 if (dn_idx < skip_naddr)
819 continue;
820
821 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
822 cb->nlh->nlmsg_seq, RTM_NEWADDR,
823 NLM_F_MULTI) < 0)
824 goto done;
825 }
826 }
827 done:
828 read_unlock(&dev_base_lock);
829
830 cb->args[0] = idx;
831 cb->args[1] = dn_idx;
832
833 return skb->len;
834 }
835
836 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
837 {
838 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
839 struct dn_ifaddr *ifa;
840 int rv = -ENODEV;
841 if (dn_db == NULL)
842 goto out;
843 ifa = dn_db->ifa_list;
844 if (ifa != NULL) {
845 *addr = ifa->ifa_local;
846 rv = 0;
847 }
848 out:
849 return rv;
850 }
851
852 /*
853 * Find a default address to bind to.
854 *
855 * This is one of those areas where the initial VMS concepts don't really
856 * map onto the Linux concepts, and since we introduced multiple addresses
857 * per interface we have to cope with slightly odd ways of finding out what
858 * "our address" really is. Mostly it's not a problem; for this we just guess
859 * a sensible default. Eventually the routing code will take care of all the
860 * nasties for us I hope.
861 */
862 int dn_dev_bind_default(__le16 *addr)
863 {
864 struct net_device *dev;
865 int rv;
866 dev = dn_dev_get_default();
867 last_chance:
868 if (dev) {
869 read_lock(&dev_base_lock);
870 rv = dn_dev_get_first(dev, addr);
871 read_unlock(&dev_base_lock);
872 dev_put(dev);
873 if (rv == 0 || dev == &loopback_dev)
874 return rv;
875 }
876 dev = &loopback_dev;
877 dev_hold(dev);
878 goto last_chance;
879 }
880
881 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
882 {
883 struct endnode_hello_message *msg;
884 struct sk_buff *skb = NULL;
885 __le16 *pktlen;
886 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
887
888 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
889 return;
890
891 skb->dev = dev;
892
893 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
894
895 msg->msgflg = 0x0D;
896 memcpy(msg->tiver, dn_eco_version, 3);
897 dn_dn2eth(msg->id, ifa->ifa_local);
898 msg->iinfo = DN_RT_INFO_ENDN;
899 msg->blksize = dn_htons(mtu2blksize(dev));
900 msg->area = 0x00;
901 memset(msg->seed, 0, 8);
902 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
903
904 if (dn_db->router) {
905 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
906 dn_dn2eth(msg->neighbor, dn->addr);
907 }
908
909 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
910 msg->mpd = 0x00;
911 msg->datalen = 0x02;
912 memset(msg->data, 0xAA, 2);
913
914 pktlen = (__le16 *)skb_push(skb,2);
915 *pktlen = dn_htons(skb->len - 2);
916
917 skb->nh.raw = skb->data;
918
919 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
920 }
921
922
923 #define DRDELAY (5 * HZ)
924
925 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
926 {
927 /* First check time since device went up */
928 if ((jiffies - dn_db->uptime) < DRDELAY)
929 return 0;
930
931 /* If there is no router, then yes... */
932 if (!dn_db->router)
933 return 1;
934
935 /* otherwise only if we have a higher priority or.. */
936 if (dn->priority < dn_db->parms.priority)
937 return 1;
938
939 /* if we have equal priority and a higher node number */
940 if (dn->priority != dn_db->parms.priority)
941 return 0;
942
943 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
944 return 1;
945
946 return 0;
947 }
948
949 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
950 {
951 int n;
952 struct dn_dev *dn_db = dev->dn_ptr;
953 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
954 struct sk_buff *skb;
955 size_t size;
956 unsigned char *ptr;
957 unsigned char *i1, *i2;
958 __le16 *pktlen;
959 char *src;
960
961 if (mtu2blksize(dev) < (26 + 7))
962 return;
963
964 n = mtu2blksize(dev) - 26;
965 n /= 7;
966
967 if (n > 32)
968 n = 32;
969
970 size = 2 + 26 + 7 * n;
971
972 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
973 return;
974
975 skb->dev = dev;
976 ptr = skb_put(skb, size);
977
978 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
979 *ptr++ = 2; /* ECO */
980 *ptr++ = 0;
981 *ptr++ = 0;
982 dn_dn2eth(ptr, ifa->ifa_local);
983 src = ptr;
984 ptr += ETH_ALEN;
985 *ptr++ = dn_db->parms.forwarding == 1 ?
986 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
987 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
988 ptr += 2;
989 *ptr++ = dn_db->parms.priority; /* Priority */
990 *ptr++ = 0; /* Area: Reserved */
991 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
992 ptr += 2;
993 *ptr++ = 0; /* MPD: Reserved */
994 i1 = ptr++;
995 memset(ptr, 0, 7); /* Name: Reserved */
996 ptr += 7;
997 i2 = ptr++;
998
999 n = dn_neigh_elist(dev, ptr, n);
1000
1001 *i2 = 7 * n;
1002 *i1 = 8 + *i2;
1003
1004 skb_trim(skb, (27 + *i2));
1005
1006 pktlen = (__le16 *)skb_push(skb, 2);
1007 *pktlen = dn_htons(skb->len - 2);
1008
1009 skb->nh.raw = skb->data;
1010
1011 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1012 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1013 if (skb2) {
1014 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1015 }
1016 }
1017
1018 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1019 }
1020
1021 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1022 {
1023 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1024
1025 if (dn_db->parms.forwarding == 0)
1026 dn_send_endnode_hello(dev, ifa);
1027 else
1028 dn_send_router_hello(dev, ifa);
1029 }
1030
1031 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1032 {
1033 int tdlen = 16;
1034 int size = dev->hard_header_len + 2 + 4 + tdlen;
1035 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1036 int i;
1037 unsigned char *ptr;
1038 char src[ETH_ALEN];
1039
1040 if (skb == NULL)
1041 return ;
1042
1043 skb->dev = dev;
1044 skb_push(skb, dev->hard_header_len);
1045 ptr = skb_put(skb, 2 + 4 + tdlen);
1046
1047 *ptr++ = DN_RT_PKT_HELO;
1048 *((__le16 *)ptr) = ifa->ifa_local;
1049 ptr += 2;
1050 *ptr++ = tdlen;
1051
1052 for(i = 0; i < tdlen; i++)
1053 *ptr++ = 0252;
1054
1055 dn_dn2eth(src, ifa->ifa_local);
1056 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1057 }
1058
1059 static int dn_eth_up(struct net_device *dev)
1060 {
1061 struct dn_dev *dn_db = dev->dn_ptr;
1062
1063 if (dn_db->parms.forwarding == 0)
1064 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1065 else
1066 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1067
1068 dev_mc_upload(dev);
1069
1070 dn_db->use_long = 1;
1071
1072 return 0;
1073 }
1074
1075 static void dn_eth_down(struct net_device *dev)
1076 {
1077 struct dn_dev *dn_db = dev->dn_ptr;
1078
1079 if (dn_db->parms.forwarding == 0)
1080 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1081 else
1082 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1083 }
1084
1085 static void dn_dev_set_timer(struct net_device *dev);
1086
1087 static void dn_dev_timer_func(unsigned long arg)
1088 {
1089 struct net_device *dev = (struct net_device *)arg;
1090 struct dn_dev *dn_db = dev->dn_ptr;
1091 struct dn_ifaddr *ifa;
1092
1093 if (dn_db->t3 <= dn_db->parms.t2) {
1094 if (dn_db->parms.timer3) {
1095 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1096 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1097 dn_db->parms.timer3(dev, ifa);
1098 }
1099 }
1100 dn_db->t3 = dn_db->parms.t3;
1101 } else {
1102 dn_db->t3 -= dn_db->parms.t2;
1103 }
1104
1105 dn_dev_set_timer(dev);
1106 }
1107
1108 static void dn_dev_set_timer(struct net_device *dev)
1109 {
1110 struct dn_dev *dn_db = dev->dn_ptr;
1111
1112 if (dn_db->parms.t2 > dn_db->parms.t3)
1113 dn_db->parms.t2 = dn_db->parms.t3;
1114
1115 dn_db->timer.data = (unsigned long)dev;
1116 dn_db->timer.function = dn_dev_timer_func;
1117 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1118
1119 add_timer(&dn_db->timer);
1120 }
1121
1122 struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1123 {
1124 int i;
1125 struct dn_dev_parms *p = dn_dev_list;
1126 struct dn_dev *dn_db;
1127
1128 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1129 if (p->type == dev->type)
1130 break;
1131 }
1132
1133 *err = -ENODEV;
1134 if (i == DN_DEV_LIST_SIZE)
1135 return NULL;
1136
1137 *err = -ENOBUFS;
1138 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1139 return NULL;
1140
1141 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1142 smp_wmb();
1143 dev->dn_ptr = dn_db;
1144 dn_db->dev = dev;
1145 init_timer(&dn_db->timer);
1146
1147 dn_db->uptime = jiffies;
1148 if (dn_db->parms.up) {
1149 if (dn_db->parms.up(dev) < 0) {
1150 dev->dn_ptr = NULL;
1151 kfree(dn_db);
1152 return NULL;
1153 }
1154 }
1155
1156 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1157
1158 dn_dev_sysctl_register(dev, &dn_db->parms);
1159
1160 dn_dev_set_timer(dev);
1161
1162 *err = 0;
1163 return dn_db;
1164 }
1165
1166
1167 /*
1168 * This processes a device up event. We only start up
1169 * the loopback device & ethernet devices with correct
1170 * MAC addreses automatically. Others must be started
1171 * specifically.
1172 *
1173 * FIXME: How should we configure the loopback address ? If we could dispense
1174 * with using decnet_address here and for autobind, it will be one less thing
1175 * for users to worry about setting up.
1176 */
1177
1178 void dn_dev_up(struct net_device *dev)
1179 {
1180 struct dn_ifaddr *ifa;
1181 __le16 addr = decnet_address;
1182 int maybe_default = 0;
1183 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1184
1185 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1186 return;
1187
1188 /*
1189 * Need to ensure that loopback device has a dn_db attached to it
1190 * to allow creation of neighbours against it, even though it might
1191 * not have a local address of its own. Might as well do the same for
1192 * all autoconfigured interfaces.
1193 */
1194 if (dn_db == NULL) {
1195 int err;
1196 dn_db = dn_dev_create(dev, &err);
1197 if (dn_db == NULL)
1198 return;
1199 }
1200
1201 if (dev->type == ARPHRD_ETHER) {
1202 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1203 return;
1204 addr = dn_eth2dn(dev->dev_addr);
1205 maybe_default = 1;
1206 }
1207
1208 if (addr == 0)
1209 return;
1210
1211 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1212 return;
1213
1214 ifa->ifa_local = ifa->ifa_address = addr;
1215 ifa->ifa_flags = 0;
1216 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1217 strcpy(ifa->ifa_label, dev->name);
1218
1219 dn_dev_set_ifa(dev, ifa);
1220
1221 /*
1222 * Automagically set the default device to the first automatically
1223 * configured ethernet card in the system.
1224 */
1225 if (maybe_default) {
1226 dev_hold(dev);
1227 if (dn_dev_set_default(dev, 0))
1228 dev_put(dev);
1229 }
1230 }
1231
1232 static void dn_dev_delete(struct net_device *dev)
1233 {
1234 struct dn_dev *dn_db = dev->dn_ptr;
1235
1236 if (dn_db == NULL)
1237 return;
1238
1239 del_timer_sync(&dn_db->timer);
1240 dn_dev_sysctl_unregister(&dn_db->parms);
1241 dn_dev_check_default(dev);
1242 neigh_ifdown(&dn_neigh_table, dev);
1243
1244 if (dn_db->parms.down)
1245 dn_db->parms.down(dev);
1246
1247 dev->dn_ptr = NULL;
1248
1249 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1250 neigh_ifdown(&dn_neigh_table, dev);
1251
1252 if (dn_db->router)
1253 neigh_release(dn_db->router);
1254 if (dn_db->peer)
1255 neigh_release(dn_db->peer);
1256
1257 kfree(dn_db);
1258 }
1259
1260 void dn_dev_down(struct net_device *dev)
1261 {
1262 struct dn_dev *dn_db = dev->dn_ptr;
1263 struct dn_ifaddr *ifa;
1264
1265 if (dn_db == NULL)
1266 return;
1267
1268 while((ifa = dn_db->ifa_list) != NULL) {
1269 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1270 dn_dev_free_ifa(ifa);
1271 }
1272
1273 dn_dev_delete(dev);
1274 }
1275
1276 void dn_dev_init_pkt(struct sk_buff *skb)
1277 {
1278 return;
1279 }
1280
1281 void dn_dev_veri_pkt(struct sk_buff *skb)
1282 {
1283 return;
1284 }
1285
1286 void dn_dev_hello(struct sk_buff *skb)
1287 {
1288 return;
1289 }
1290
1291 void dn_dev_devices_off(void)
1292 {
1293 struct net_device *dev;
1294
1295 rtnl_lock();
1296 for(dev = dev_base; dev; dev = dev->next)
1297 dn_dev_down(dev);
1298 rtnl_unlock();
1299
1300 }
1301
1302 void dn_dev_devices_on(void)
1303 {
1304 struct net_device *dev;
1305
1306 rtnl_lock();
1307 for(dev = dev_base; dev; dev = dev->next) {
1308 if (dev->flags & IFF_UP)
1309 dn_dev_up(dev);
1310 }
1311 rtnl_unlock();
1312 }
1313
1314 int register_dnaddr_notifier(struct notifier_block *nb)
1315 {
1316 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1317 }
1318
1319 int unregister_dnaddr_notifier(struct notifier_block *nb)
1320 {
1321 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1322 }
1323
1324 #ifdef CONFIG_PROC_FS
1325 static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev)
1326 {
1327 do {
1328 dev = dev->next;
1329 } while(dev && !dev->dn_ptr);
1330
1331 return dev;
1332 }
1333
1334 static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos)
1335 {
1336 struct net_device *dev;
1337
1338 dev = dev_base;
1339 if (dev && !dev->dn_ptr)
1340 dev = dn_dev_get_next(seq, dev);
1341 if (pos) {
1342 while(dev && (dev = dn_dev_get_next(seq, dev)))
1343 --pos;
1344 }
1345 return dev;
1346 }
1347
1348 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1349 {
1350 if (*pos) {
1351 struct net_device *dev;
1352 read_lock(&dev_base_lock);
1353 dev = dn_dev_get_idx(seq, *pos - 1);
1354 if (dev == NULL)
1355 read_unlock(&dev_base_lock);
1356 return dev;
1357 }
1358 return SEQ_START_TOKEN;
1359 }
1360
1361 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1362 {
1363 struct net_device *dev = v;
1364 loff_t one = 1;
1365
1366 if (v == SEQ_START_TOKEN) {
1367 dev = dn_dev_seq_start(seq, &one);
1368 } else {
1369 dev = dn_dev_get_next(seq, dev);
1370 if (dev == NULL)
1371 read_unlock(&dev_base_lock);
1372 }
1373 ++*pos;
1374 return dev;
1375 }
1376
1377 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1378 {
1379 if (v && v != SEQ_START_TOKEN)
1380 read_unlock(&dev_base_lock);
1381 }
1382
1383 static char *dn_type2asc(char type)
1384 {
1385 switch(type) {
1386 case DN_DEV_BCAST:
1387 return "B";
1388 case DN_DEV_UCAST:
1389 return "U";
1390 case DN_DEV_MPOINT:
1391 return "M";
1392 }
1393
1394 return "?";
1395 }
1396
1397 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1398 {
1399 if (v == SEQ_START_TOKEN)
1400 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1401 else {
1402 struct net_device *dev = v;
1403 char peer_buf[DN_ASCBUF_LEN];
1404 char router_buf[DN_ASCBUF_LEN];
1405 struct dn_dev *dn_db = dev->dn_ptr;
1406
1407 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1408 " %04hu %03d %02x %-10s %-7s %-7s\n",
1409 dev->name ? dev->name : "???",
1410 dn_type2asc(dn_db->parms.mode),
1411 0, 0,
1412 dn_db->t3, dn_db->parms.t3,
1413 mtu2blksize(dev),
1414 dn_db->parms.priority,
1415 dn_db->parms.state, dn_db->parms.name,
1416 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1417 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1418 }
1419 return 0;
1420 }
1421
1422 static struct seq_operations dn_dev_seq_ops = {
1423 .start = dn_dev_seq_start,
1424 .next = dn_dev_seq_next,
1425 .stop = dn_dev_seq_stop,
1426 .show = dn_dev_seq_show,
1427 };
1428
1429 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1430 {
1431 return seq_open(file, &dn_dev_seq_ops);
1432 }
1433
1434 static struct file_operations dn_dev_seq_fops = {
1435 .owner = THIS_MODULE,
1436 .open = dn_dev_seq_open,
1437 .read = seq_read,
1438 .llseek = seq_lseek,
1439 .release = seq_release,
1440 };
1441
1442 #endif /* CONFIG_PROC_FS */
1443
1444 static struct rtnetlink_link dnet_rtnetlink_table[RTM_NR_MSGTYPES] =
1445 {
1446 [RTM_NEWADDR - RTM_BASE] = { .doit = dn_nl_newaddr, },
1447 [RTM_DELADDR - RTM_BASE] = { .doit = dn_nl_deladdr, },
1448 [RTM_GETADDR - RTM_BASE] = { .dumpit = dn_nl_dump_ifaddr, },
1449 #ifdef CONFIG_DECNET_ROUTER
1450 [RTM_NEWROUTE - RTM_BASE] = { .doit = dn_fib_rtm_newroute, },
1451 [RTM_DELROUTE - RTM_BASE] = { .doit = dn_fib_rtm_delroute, },
1452 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1453 .dumpit = dn_fib_dump, },
1454 [RTM_GETRULE - RTM_BASE] = { .dumpit = dn_fib_dump_rules, },
1455 #else
1456 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1457 .dumpit = dn_cache_dump, },
1458 #endif
1459
1460 };
1461
1462 static int __initdata addr[2];
1463 module_param_array(addr, int, NULL, 0444);
1464 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1465
1466 void __init dn_dev_init(void)
1467 {
1468 if (addr[0] > 63 || addr[0] < 0) {
1469 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1470 return;
1471 }
1472
1473 if (addr[1] > 1023 || addr[1] < 0) {
1474 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1475 return;
1476 }
1477
1478 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1479
1480 dn_dev_devices_on();
1481
1482 rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table;
1483
1484 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1485
1486 #ifdef CONFIG_SYSCTL
1487 {
1488 int i;
1489 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1490 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1491 }
1492 #endif /* CONFIG_SYSCTL */
1493 }
1494
1495 void __exit dn_dev_cleanup(void)
1496 {
1497 rtnetlink_links[PF_DECnet] = NULL;
1498
1499 #ifdef CONFIG_SYSCTL
1500 {
1501 int i;
1502 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1503 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1504 }
1505 #endif /* CONFIG_SYSCTL */
1506
1507 proc_net_remove("decnet_dev");
1508
1509 dn_dev_devices_off();
1510 }
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