Root/
1 | /* |
2 | * DECnet An implementation of the DECnet protocol suite for the LINUX |
3 | * operating system. DECnet is implemented using the BSD Socket |
4 | * interface as the means of communication with the user level. |
5 | * |
6 | * DECnet Device Layer |
7 | * |
8 | * Authors: Steve Whitehouse <SteveW@ACM.org> |
9 | * Eduardo Marcelo Serrat <emserrat@geocities.com> |
10 | * |
11 | * Changes: |
12 | * Steve Whitehouse : Devices now see incoming frames so they |
13 | * can mark on who it came from. |
14 | * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour |
15 | * can now have a device specific setup func. |
16 | * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/ |
17 | * Steve Whitehouse : Fixed bug which sometimes killed timer |
18 | * Steve Whitehouse : Multiple ifaddr support |
19 | * Steve Whitehouse : SIOCGIFCONF is now a compile time option |
20 | * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding |
21 | * Steve Whitehouse : Removed timer1 - it's a user space issue now |
22 | * Patrick Caulfield : Fixed router hello message format |
23 | * Steve Whitehouse : Got rid of constant sizes for blksize for |
24 | * devices. All mtu based now. |
25 | */ |
26 | |
27 | #include <linux/capability.h> |
28 | #include <linux/module.h> |
29 | #include <linux/moduleparam.h> |
30 | #include <linux/init.h> |
31 | #include <linux/net.h> |
32 | #include <linux/netdevice.h> |
33 | #include <linux/proc_fs.h> |
34 | #include <linux/seq_file.h> |
35 | #include <linux/timer.h> |
36 | #include <linux/string.h> |
37 | #include <linux/if_addr.h> |
38 | #include <linux/if_arp.h> |
39 | #include <linux/if_ether.h> |
40 | #include <linux/skbuff.h> |
41 | #include <linux/sysctl.h> |
42 | #include <linux/notifier.h> |
43 | #include <linux/slab.h> |
44 | #include <asm/uaccess.h> |
45 | #include <asm/system.h> |
46 | #include <net/net_namespace.h> |
47 | #include <net/neighbour.h> |
48 | #include <net/dst.h> |
49 | #include <net/flow.h> |
50 | #include <net/fib_rules.h> |
51 | #include <net/netlink.h> |
52 | #include <net/dn.h> |
53 | #include <net/dn_dev.h> |
54 | #include <net/dn_route.h> |
55 | #include <net/dn_neigh.h> |
56 | #include <net/dn_fib.h> |
57 | |
58 | #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn)) |
59 | |
60 | static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; |
61 | static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; |
62 | static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; |
63 | static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; |
64 | |
65 | extern struct neigh_table dn_neigh_table; |
66 | |
67 | /* |
68 | * decnet_address is kept in network order. |
69 | */ |
70 | __le16 decnet_address = 0; |
71 | |
72 | static DEFINE_SPINLOCK(dndev_lock); |
73 | static struct net_device *decnet_default_device; |
74 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
75 | |
76 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); |
77 | static void dn_dev_delete(struct net_device *dev); |
78 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
79 | |
80 | static int dn_eth_up(struct net_device *); |
81 | static void dn_eth_down(struct net_device *); |
82 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); |
83 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); |
84 | |
85 | static struct dn_dev_parms dn_dev_list[] = { |
86 | { |
87 | .type = ARPHRD_ETHER, /* Ethernet */ |
88 | .mode = DN_DEV_BCAST, |
89 | .state = DN_DEV_S_RU, |
90 | .t2 = 1, |
91 | .t3 = 10, |
92 | .name = "ethernet", |
93 | .up = dn_eth_up, |
94 | .down = dn_eth_down, |
95 | .timer3 = dn_send_brd_hello, |
96 | }, |
97 | { |
98 | .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ |
99 | .mode = DN_DEV_BCAST, |
100 | .state = DN_DEV_S_RU, |
101 | .t2 = 1, |
102 | .t3 = 10, |
103 | .name = "ipgre", |
104 | .timer3 = dn_send_brd_hello, |
105 | }, |
106 | #if 0 |
107 | { |
108 | .type = ARPHRD_X25, /* Bog standard X.25 */ |
109 | .mode = DN_DEV_UCAST, |
110 | .state = DN_DEV_S_DS, |
111 | .t2 = 1, |
112 | .t3 = 120, |
113 | .name = "x25", |
114 | .timer3 = dn_send_ptp_hello, |
115 | }, |
116 | #endif |
117 | #if 0 |
118 | { |
119 | .type = ARPHRD_PPP, /* DECnet over PPP */ |
120 | .mode = DN_DEV_BCAST, |
121 | .state = DN_DEV_S_RU, |
122 | .t2 = 1, |
123 | .t3 = 10, |
124 | .name = "ppp", |
125 | .timer3 = dn_send_brd_hello, |
126 | }, |
127 | #endif |
128 | { |
129 | .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ |
130 | .mode = DN_DEV_UCAST, |
131 | .state = DN_DEV_S_DS, |
132 | .t2 = 1, |
133 | .t3 = 120, |
134 | .name = "ddcmp", |
135 | .timer3 = dn_send_ptp_hello, |
136 | }, |
137 | { |
138 | .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ |
139 | .mode = DN_DEV_BCAST, |
140 | .state = DN_DEV_S_RU, |
141 | .t2 = 1, |
142 | .t3 = 10, |
143 | .name = "loopback", |
144 | .timer3 = dn_send_brd_hello, |
145 | } |
146 | }; |
147 | |
148 | #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
149 | |
150 | #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
151 | |
152 | #ifdef CONFIG_SYSCTL |
153 | |
154 | static int min_t2[] = { 1 }; |
155 | static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ |
156 | static int min_t3[] = { 1 }; |
157 | static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ |
158 | |
159 | static int min_priority[1]; |
160 | static int max_priority[] = { 127 }; /* From DECnet spec */ |
161 | |
162 | static int dn_forwarding_proc(ctl_table *, int, |
163 | void __user *, size_t *, loff_t *); |
164 | static struct dn_dev_sysctl_table { |
165 | struct ctl_table_header *sysctl_header; |
166 | ctl_table dn_dev_vars[5]; |
167 | } dn_dev_sysctl = { |
168 | NULL, |
169 | { |
170 | { |
171 | .procname = "forwarding", |
172 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), |
173 | .maxlen = sizeof(int), |
174 | .mode = 0644, |
175 | .proc_handler = dn_forwarding_proc, |
176 | }, |
177 | { |
178 | .procname = "priority", |
179 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), |
180 | .maxlen = sizeof(int), |
181 | .mode = 0644, |
182 | .proc_handler = proc_dointvec_minmax, |
183 | .extra1 = &min_priority, |
184 | .extra2 = &max_priority |
185 | }, |
186 | { |
187 | .procname = "t2", |
188 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), |
189 | .maxlen = sizeof(int), |
190 | .mode = 0644, |
191 | .proc_handler = proc_dointvec_minmax, |
192 | .extra1 = &min_t2, |
193 | .extra2 = &max_t2 |
194 | }, |
195 | { |
196 | .procname = "t3", |
197 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), |
198 | .maxlen = sizeof(int), |
199 | .mode = 0644, |
200 | .proc_handler = proc_dointvec_minmax, |
201 | .extra1 = &min_t3, |
202 | .extra2 = &max_t3 |
203 | }, |
204 | {0} |
205 | }, |
206 | }; |
207 | |
208 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) |
209 | { |
210 | struct dn_dev_sysctl_table *t; |
211 | int i; |
212 | |
213 | #define DN_CTL_PATH_DEV 3 |
214 | |
215 | struct ctl_path dn_ctl_path[] = { |
216 | { .procname = "net", }, |
217 | { .procname = "decnet", }, |
218 | { .procname = "conf", }, |
219 | { /* to be set */ }, |
220 | { }, |
221 | }; |
222 | |
223 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
224 | if (t == NULL) |
225 | return; |
226 | |
227 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
228 | long offset = (long)t->dn_dev_vars[i].data; |
229 | t->dn_dev_vars[i].data = ((char *)parms) + offset; |
230 | } |
231 | |
232 | if (dev) { |
233 | dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name; |
234 | } else { |
235 | dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name; |
236 | } |
237 | |
238 | t->dn_dev_vars[0].extra1 = (void *)dev; |
239 | |
240 | t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars); |
241 | if (t->sysctl_header == NULL) |
242 | kfree(t); |
243 | else |
244 | parms->sysctl = t; |
245 | } |
246 | |
247 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) |
248 | { |
249 | if (parms->sysctl) { |
250 | struct dn_dev_sysctl_table *t = parms->sysctl; |
251 | parms->sysctl = NULL; |
252 | unregister_sysctl_table(t->sysctl_header); |
253 | kfree(t); |
254 | } |
255 | } |
256 | |
257 | static int dn_forwarding_proc(ctl_table *table, int write, |
258 | void __user *buffer, |
259 | size_t *lenp, loff_t *ppos) |
260 | { |
261 | #ifdef CONFIG_DECNET_ROUTER |
262 | struct net_device *dev = table->extra1; |
263 | struct dn_dev *dn_db; |
264 | int err; |
265 | int tmp, old; |
266 | |
267 | if (table->extra1 == NULL) |
268 | return -EINVAL; |
269 | |
270 | dn_db = dev->dn_ptr; |
271 | old = dn_db->parms.forwarding; |
272 | |
273 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
274 | |
275 | if ((err >= 0) && write) { |
276 | if (dn_db->parms.forwarding < 0) |
277 | dn_db->parms.forwarding = 0; |
278 | if (dn_db->parms.forwarding > 2) |
279 | dn_db->parms.forwarding = 2; |
280 | /* |
281 | * What an ugly hack this is... its works, just. It |
282 | * would be nice if sysctl/proc were just that little |
283 | * bit more flexible so I don't have to write a special |
284 | * routine, or suffer hacks like this - SJW |
285 | */ |
286 | tmp = dn_db->parms.forwarding; |
287 | dn_db->parms.forwarding = old; |
288 | if (dn_db->parms.down) |
289 | dn_db->parms.down(dev); |
290 | dn_db->parms.forwarding = tmp; |
291 | if (dn_db->parms.up) |
292 | dn_db->parms.up(dev); |
293 | } |
294 | |
295 | return err; |
296 | #else |
297 | return -EINVAL; |
298 | #endif |
299 | } |
300 | |
301 | #else /* CONFIG_SYSCTL */ |
302 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) |
303 | { |
304 | } |
305 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) |
306 | { |
307 | } |
308 | |
309 | #endif /* CONFIG_SYSCTL */ |
310 | |
311 | static inline __u16 mtu2blksize(struct net_device *dev) |
312 | { |
313 | u32 blksize = dev->mtu; |
314 | if (blksize > 0xffff) |
315 | blksize = 0xffff; |
316 | |
317 | if (dev->type == ARPHRD_ETHER || |
318 | dev->type == ARPHRD_PPP || |
319 | dev->type == ARPHRD_IPGRE || |
320 | dev->type == ARPHRD_LOOPBACK) |
321 | blksize -= 2; |
322 | |
323 | return (__u16)blksize; |
324 | } |
325 | |
326 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) |
327 | { |
328 | struct dn_ifaddr *ifa; |
329 | |
330 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
331 | |
332 | return ifa; |
333 | } |
334 | |
335 | static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
336 | { |
337 | kfree(ifa); |
338 | } |
339 | |
340 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy) |
341 | { |
342 | struct dn_ifaddr *ifa1 = *ifap; |
343 | unsigned char mac_addr[6]; |
344 | struct net_device *dev = dn_db->dev; |
345 | |
346 | ASSERT_RTNL(); |
347 | |
348 | *ifap = ifa1->ifa_next; |
349 | |
350 | if (dn_db->dev->type == ARPHRD_ETHER) { |
351 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
352 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
353 | dev_mc_delete(dev, mac_addr, ETH_ALEN, 0); |
354 | } |
355 | } |
356 | |
357 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
358 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
359 | if (destroy) { |
360 | dn_dev_free_ifa(ifa1); |
361 | |
362 | if (dn_db->ifa_list == NULL) |
363 | dn_dev_delete(dn_db->dev); |
364 | } |
365 | } |
366 | |
367 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
368 | { |
369 | struct net_device *dev = dn_db->dev; |
370 | struct dn_ifaddr *ifa1; |
371 | unsigned char mac_addr[6]; |
372 | |
373 | ASSERT_RTNL(); |
374 | |
375 | /* Check for duplicates */ |
376 | for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { |
377 | if (ifa1->ifa_local == ifa->ifa_local) |
378 | return -EEXIST; |
379 | } |
380 | |
381 | if (dev->type == ARPHRD_ETHER) { |
382 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
383 | dn_dn2eth(mac_addr, ifa->ifa_local); |
384 | dev_mc_add(dev, mac_addr, ETH_ALEN, 0); |
385 | } |
386 | } |
387 | |
388 | ifa->ifa_next = dn_db->ifa_list; |
389 | dn_db->ifa_list = ifa; |
390 | |
391 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
392 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
393 | |
394 | return 0; |
395 | } |
396 | |
397 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) |
398 | { |
399 | struct dn_dev *dn_db = dev->dn_ptr; |
400 | int rv; |
401 | |
402 | if (dn_db == NULL) { |
403 | int err; |
404 | dn_db = dn_dev_create(dev, &err); |
405 | if (dn_db == NULL) |
406 | return err; |
407 | } |
408 | |
409 | ifa->ifa_dev = dn_db; |
410 | |
411 | if (dev->flags & IFF_LOOPBACK) |
412 | ifa->ifa_scope = RT_SCOPE_HOST; |
413 | |
414 | rv = dn_dev_insert_ifa(dn_db, ifa); |
415 | if (rv) |
416 | dn_dev_free_ifa(ifa); |
417 | return rv; |
418 | } |
419 | |
420 | |
421 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) |
422 | { |
423 | char buffer[DN_IFREQ_SIZE]; |
424 | struct ifreq *ifr = (struct ifreq *)buffer; |
425 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; |
426 | struct dn_dev *dn_db; |
427 | struct net_device *dev; |
428 | struct dn_ifaddr *ifa = NULL, **ifap = NULL; |
429 | int ret = 0; |
430 | |
431 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) |
432 | return -EFAULT; |
433 | ifr->ifr_name[IFNAMSIZ-1] = 0; |
434 | |
435 | dev_load(&init_net, ifr->ifr_name); |
436 | |
437 | switch(cmd) { |
438 | case SIOCGIFADDR: |
439 | break; |
440 | case SIOCSIFADDR: |
441 | if (!capable(CAP_NET_ADMIN)) |
442 | return -EACCES; |
443 | if (sdn->sdn_family != AF_DECnet) |
444 | return -EINVAL; |
445 | break; |
446 | default: |
447 | return -EINVAL; |
448 | } |
449 | |
450 | rtnl_lock(); |
451 | |
452 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
453 | ret = -ENODEV; |
454 | goto done; |
455 | } |
456 | |
457 | if ((dn_db = dev->dn_ptr) != NULL) { |
458 | for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) |
459 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
460 | break; |
461 | } |
462 | |
463 | if (ifa == NULL && cmd != SIOCSIFADDR) { |
464 | ret = -EADDRNOTAVAIL; |
465 | goto done; |
466 | } |
467 | |
468 | switch(cmd) { |
469 | case SIOCGIFADDR: |
470 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
471 | goto rarok; |
472 | |
473 | case SIOCSIFADDR: |
474 | if (!ifa) { |
475 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { |
476 | ret = -ENOBUFS; |
477 | break; |
478 | } |
479 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
480 | } else { |
481 | if (ifa->ifa_local == dn_saddr2dn(sdn)) |
482 | break; |
483 | dn_dev_del_ifa(dn_db, ifap, 0); |
484 | } |
485 | |
486 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
487 | |
488 | ret = dn_dev_set_ifa(dev, ifa); |
489 | } |
490 | done: |
491 | rtnl_unlock(); |
492 | |
493 | return ret; |
494 | rarok: |
495 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) |
496 | ret = -EFAULT; |
497 | goto done; |
498 | } |
499 | |
500 | struct net_device *dn_dev_get_default(void) |
501 | { |
502 | struct net_device *dev; |
503 | |
504 | spin_lock(&dndev_lock); |
505 | dev = decnet_default_device; |
506 | if (dev) { |
507 | if (dev->dn_ptr) |
508 | dev_hold(dev); |
509 | else |
510 | dev = NULL; |
511 | } |
512 | spin_unlock(&dndev_lock); |
513 | |
514 | return dev; |
515 | } |
516 | |
517 | int dn_dev_set_default(struct net_device *dev, int force) |
518 | { |
519 | struct net_device *old = NULL; |
520 | int rv = -EBUSY; |
521 | if (!dev->dn_ptr) |
522 | return -ENODEV; |
523 | |
524 | spin_lock(&dndev_lock); |
525 | if (force || decnet_default_device == NULL) { |
526 | old = decnet_default_device; |
527 | decnet_default_device = dev; |
528 | rv = 0; |
529 | } |
530 | spin_unlock(&dndev_lock); |
531 | |
532 | if (old) |
533 | dev_put(old); |
534 | return rv; |
535 | } |
536 | |
537 | static void dn_dev_check_default(struct net_device *dev) |
538 | { |
539 | spin_lock(&dndev_lock); |
540 | if (dev == decnet_default_device) { |
541 | decnet_default_device = NULL; |
542 | } else { |
543 | dev = NULL; |
544 | } |
545 | spin_unlock(&dndev_lock); |
546 | |
547 | if (dev) |
548 | dev_put(dev); |
549 | } |
550 | |
551 | /* |
552 | * Called with RTNL |
553 | */ |
554 | static struct dn_dev *dn_dev_by_index(int ifindex) |
555 | { |
556 | struct net_device *dev; |
557 | struct dn_dev *dn_dev = NULL; |
558 | |
559 | dev = __dev_get_by_index(&init_net, ifindex); |
560 | if (dev) |
561 | dn_dev = dev->dn_ptr; |
562 | |
563 | return dn_dev; |
564 | } |
565 | |
566 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
567 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
568 | [IFA_LOCAL] = { .type = NLA_U16 }, |
569 | [IFA_LABEL] = { .type = NLA_STRING, |
570 | .len = IFNAMSIZ - 1 }, |
571 | }; |
572 | |
573 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
574 | { |
575 | struct net *net = sock_net(skb->sk); |
576 | struct nlattr *tb[IFA_MAX+1]; |
577 | struct dn_dev *dn_db; |
578 | struct ifaddrmsg *ifm; |
579 | struct dn_ifaddr *ifa, **ifap; |
580 | int err = -EINVAL; |
581 | |
582 | if (!net_eq(net, &init_net)) |
583 | goto errout; |
584 | |
585 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
586 | if (err < 0) |
587 | goto errout; |
588 | |
589 | err = -ENODEV; |
590 | ifm = nlmsg_data(nlh); |
591 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
592 | goto errout; |
593 | |
594 | err = -EADDRNOTAVAIL; |
595 | for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) { |
596 | if (tb[IFA_LOCAL] && |
597 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) |
598 | continue; |
599 | |
600 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
601 | continue; |
602 | |
603 | dn_dev_del_ifa(dn_db, ifap, 1); |
604 | return 0; |
605 | } |
606 | |
607 | errout: |
608 | return err; |
609 | } |
610 | |
611 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
612 | { |
613 | struct net *net = sock_net(skb->sk); |
614 | struct nlattr *tb[IFA_MAX+1]; |
615 | struct net_device *dev; |
616 | struct dn_dev *dn_db; |
617 | struct ifaddrmsg *ifm; |
618 | struct dn_ifaddr *ifa; |
619 | int err; |
620 | |
621 | if (!net_eq(net, &init_net)) |
622 | return -EINVAL; |
623 | |
624 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
625 | if (err < 0) |
626 | return err; |
627 | |
628 | if (tb[IFA_LOCAL] == NULL) |
629 | return -EINVAL; |
630 | |
631 | ifm = nlmsg_data(nlh); |
632 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
633 | return -ENODEV; |
634 | |
635 | if ((dn_db = dev->dn_ptr) == NULL) { |
636 | dn_db = dn_dev_create(dev, &err); |
637 | if (!dn_db) |
638 | return err; |
639 | } |
640 | |
641 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
642 | return -ENOBUFS; |
643 | |
644 | if (tb[IFA_ADDRESS] == NULL) |
645 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
646 | |
647 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); |
648 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); |
649 | ifa->ifa_flags = ifm->ifa_flags; |
650 | ifa->ifa_scope = ifm->ifa_scope; |
651 | ifa->ifa_dev = dn_db; |
652 | |
653 | if (tb[IFA_LABEL]) |
654 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
655 | else |
656 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
657 | |
658 | err = dn_dev_insert_ifa(dn_db, ifa); |
659 | if (err) |
660 | dn_dev_free_ifa(ifa); |
661 | |
662 | return err; |
663 | } |
664 | |
665 | static inline size_t dn_ifaddr_nlmsg_size(void) |
666 | { |
667 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
668 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
669 | + nla_total_size(2) /* IFA_ADDRESS */ |
670 | + nla_total_size(2); /* IFA_LOCAL */ |
671 | } |
672 | |
673 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
674 | u32 pid, u32 seq, int event, unsigned int flags) |
675 | { |
676 | struct ifaddrmsg *ifm; |
677 | struct nlmsghdr *nlh; |
678 | |
679 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
680 | if (nlh == NULL) |
681 | return -EMSGSIZE; |
682 | |
683 | ifm = nlmsg_data(nlh); |
684 | ifm->ifa_family = AF_DECnet; |
685 | ifm->ifa_prefixlen = 16; |
686 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; |
687 | ifm->ifa_scope = ifa->ifa_scope; |
688 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
689 | |
690 | if (ifa->ifa_address) |
691 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
692 | if (ifa->ifa_local) |
693 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
694 | if (ifa->ifa_label[0]) |
695 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
696 | |
697 | return nlmsg_end(skb, nlh); |
698 | |
699 | nla_put_failure: |
700 | nlmsg_cancel(skb, nlh); |
701 | return -EMSGSIZE; |
702 | } |
703 | |
704 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
705 | { |
706 | struct sk_buff *skb; |
707 | int err = -ENOBUFS; |
708 | |
709 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
710 | if (skb == NULL) |
711 | goto errout; |
712 | |
713 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
714 | if (err < 0) { |
715 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ |
716 | WARN_ON(err == -EMSGSIZE); |
717 | kfree_skb(skb); |
718 | goto errout; |
719 | } |
720 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
721 | return; |
722 | errout: |
723 | if (err < 0) |
724 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
725 | } |
726 | |
727 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
728 | { |
729 | struct net *net = sock_net(skb->sk); |
730 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
731 | struct net_device *dev; |
732 | struct dn_dev *dn_db; |
733 | struct dn_ifaddr *ifa; |
734 | |
735 | if (!net_eq(net, &init_net)) |
736 | return 0; |
737 | |
738 | skip_ndevs = cb->args[0]; |
739 | skip_naddr = cb->args[1]; |
740 | |
741 | idx = 0; |
742 | for_each_netdev(&init_net, dev) { |
743 | if (idx < skip_ndevs) |
744 | goto cont; |
745 | else if (idx > skip_ndevs) { |
746 | /* Only skip over addresses for first dev dumped |
747 | * in this iteration (idx == skip_ndevs) */ |
748 | skip_naddr = 0; |
749 | } |
750 | |
751 | if ((dn_db = dev->dn_ptr) == NULL) |
752 | goto cont; |
753 | |
754 | for (ifa = dn_db->ifa_list, dn_idx = 0; ifa; |
755 | ifa = ifa->ifa_next, dn_idx++) { |
756 | if (dn_idx < skip_naddr) |
757 | continue; |
758 | |
759 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
760 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
761 | NLM_F_MULTI) < 0) |
762 | goto done; |
763 | } |
764 | cont: |
765 | idx++; |
766 | } |
767 | done: |
768 | cb->args[0] = idx; |
769 | cb->args[1] = dn_idx; |
770 | |
771 | return skb->len; |
772 | } |
773 | |
774 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
775 | { |
776 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
777 | struct dn_ifaddr *ifa; |
778 | int rv = -ENODEV; |
779 | |
780 | if (dn_db == NULL) |
781 | goto out; |
782 | |
783 | rtnl_lock(); |
784 | ifa = dn_db->ifa_list; |
785 | if (ifa != NULL) { |
786 | *addr = ifa->ifa_local; |
787 | rv = 0; |
788 | } |
789 | rtnl_unlock(); |
790 | out: |
791 | return rv; |
792 | } |
793 | |
794 | /* |
795 | * Find a default address to bind to. |
796 | * |
797 | * This is one of those areas where the initial VMS concepts don't really |
798 | * map onto the Linux concepts, and since we introduced multiple addresses |
799 | * per interface we have to cope with slightly odd ways of finding out what |
800 | * "our address" really is. Mostly it's not a problem; for this we just guess |
801 | * a sensible default. Eventually the routing code will take care of all the |
802 | * nasties for us I hope. |
803 | */ |
804 | int dn_dev_bind_default(__le16 *addr) |
805 | { |
806 | struct net_device *dev; |
807 | int rv; |
808 | dev = dn_dev_get_default(); |
809 | last_chance: |
810 | if (dev) { |
811 | rv = dn_dev_get_first(dev, addr); |
812 | dev_put(dev); |
813 | if (rv == 0 || dev == init_net.loopback_dev) |
814 | return rv; |
815 | } |
816 | dev = init_net.loopback_dev; |
817 | dev_hold(dev); |
818 | goto last_chance; |
819 | } |
820 | |
821 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
822 | { |
823 | struct endnode_hello_message *msg; |
824 | struct sk_buff *skb = NULL; |
825 | __le16 *pktlen; |
826 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
827 | |
828 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
829 | return; |
830 | |
831 | skb->dev = dev; |
832 | |
833 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
834 | |
835 | msg->msgflg = 0x0D; |
836 | memcpy(msg->tiver, dn_eco_version, 3); |
837 | dn_dn2eth(msg->id, ifa->ifa_local); |
838 | msg->iinfo = DN_RT_INFO_ENDN; |
839 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
840 | msg->area = 0x00; |
841 | memset(msg->seed, 0, 8); |
842 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); |
843 | |
844 | if (dn_db->router) { |
845 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
846 | dn_dn2eth(msg->neighbor, dn->addr); |
847 | } |
848 | |
849 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
850 | msg->mpd = 0x00; |
851 | msg->datalen = 0x02; |
852 | memset(msg->data, 0xAA, 2); |
853 | |
854 | pktlen = (__le16 *)skb_push(skb,2); |
855 | *pktlen = cpu_to_le16(skb->len - 2); |
856 | |
857 | skb_reset_network_header(skb); |
858 | |
859 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); |
860 | } |
861 | |
862 | |
863 | #define DRDELAY (5 * HZ) |
864 | |
865 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
866 | { |
867 | /* First check time since device went up */ |
868 | if ((jiffies - dn_db->uptime) < DRDELAY) |
869 | return 0; |
870 | |
871 | /* If there is no router, then yes... */ |
872 | if (!dn_db->router) |
873 | return 1; |
874 | |
875 | /* otherwise only if we have a higher priority or.. */ |
876 | if (dn->priority < dn_db->parms.priority) |
877 | return 1; |
878 | |
879 | /* if we have equal priority and a higher node number */ |
880 | if (dn->priority != dn_db->parms.priority) |
881 | return 0; |
882 | |
883 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
884 | return 1; |
885 | |
886 | return 0; |
887 | } |
888 | |
889 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
890 | { |
891 | int n; |
892 | struct dn_dev *dn_db = dev->dn_ptr; |
893 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
894 | struct sk_buff *skb; |
895 | size_t size; |
896 | unsigned char *ptr; |
897 | unsigned char *i1, *i2; |
898 | __le16 *pktlen; |
899 | char *src; |
900 | |
901 | if (mtu2blksize(dev) < (26 + 7)) |
902 | return; |
903 | |
904 | n = mtu2blksize(dev) - 26; |
905 | n /= 7; |
906 | |
907 | if (n > 32) |
908 | n = 32; |
909 | |
910 | size = 2 + 26 + 7 * n; |
911 | |
912 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) |
913 | return; |
914 | |
915 | skb->dev = dev; |
916 | ptr = skb_put(skb, size); |
917 | |
918 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; |
919 | *ptr++ = 2; /* ECO */ |
920 | *ptr++ = 0; |
921 | *ptr++ = 0; |
922 | dn_dn2eth(ptr, ifa->ifa_local); |
923 | src = ptr; |
924 | ptr += ETH_ALEN; |
925 | *ptr++ = dn_db->parms.forwarding == 1 ? |
926 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
927 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
928 | ptr += 2; |
929 | *ptr++ = dn_db->parms.priority; /* Priority */ |
930 | *ptr++ = 0; /* Area: Reserved */ |
931 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
932 | ptr += 2; |
933 | *ptr++ = 0; /* MPD: Reserved */ |
934 | i1 = ptr++; |
935 | memset(ptr, 0, 7); /* Name: Reserved */ |
936 | ptr += 7; |
937 | i2 = ptr++; |
938 | |
939 | n = dn_neigh_elist(dev, ptr, n); |
940 | |
941 | *i2 = 7 * n; |
942 | *i1 = 8 + *i2; |
943 | |
944 | skb_trim(skb, (27 + *i2)); |
945 | |
946 | pktlen = (__le16 *)skb_push(skb, 2); |
947 | *pktlen = cpu_to_le16(skb->len - 2); |
948 | |
949 | skb_reset_network_header(skb); |
950 | |
951 | if (dn_am_i_a_router(dn, dn_db, ifa)) { |
952 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); |
953 | if (skb2) { |
954 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); |
955 | } |
956 | } |
957 | |
958 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
959 | } |
960 | |
961 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
962 | { |
963 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
964 | |
965 | if (dn_db->parms.forwarding == 0) |
966 | dn_send_endnode_hello(dev, ifa); |
967 | else |
968 | dn_send_router_hello(dev, ifa); |
969 | } |
970 | |
971 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
972 | { |
973 | int tdlen = 16; |
974 | int size = dev->hard_header_len + 2 + 4 + tdlen; |
975 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); |
976 | int i; |
977 | unsigned char *ptr; |
978 | char src[ETH_ALEN]; |
979 | |
980 | if (skb == NULL) |
981 | return ; |
982 | |
983 | skb->dev = dev; |
984 | skb_push(skb, dev->hard_header_len); |
985 | ptr = skb_put(skb, 2 + 4 + tdlen); |
986 | |
987 | *ptr++ = DN_RT_PKT_HELO; |
988 | *((__le16 *)ptr) = ifa->ifa_local; |
989 | ptr += 2; |
990 | *ptr++ = tdlen; |
991 | |
992 | for(i = 0; i < tdlen; i++) |
993 | *ptr++ = 0252; |
994 | |
995 | dn_dn2eth(src, ifa->ifa_local); |
996 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
997 | } |
998 | |
999 | static int dn_eth_up(struct net_device *dev) |
1000 | { |
1001 | struct dn_dev *dn_db = dev->dn_ptr; |
1002 | |
1003 | if (dn_db->parms.forwarding == 0) |
1004 | dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); |
1005 | else |
1006 | dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); |
1007 | |
1008 | dn_db->use_long = 1; |
1009 | |
1010 | return 0; |
1011 | } |
1012 | |
1013 | static void dn_eth_down(struct net_device *dev) |
1014 | { |
1015 | struct dn_dev *dn_db = dev->dn_ptr; |
1016 | |
1017 | if (dn_db->parms.forwarding == 0) |
1018 | dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); |
1019 | else |
1020 | dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); |
1021 | } |
1022 | |
1023 | static void dn_dev_set_timer(struct net_device *dev); |
1024 | |
1025 | static void dn_dev_timer_func(unsigned long arg) |
1026 | { |
1027 | struct net_device *dev = (struct net_device *)arg; |
1028 | struct dn_dev *dn_db = dev->dn_ptr; |
1029 | struct dn_ifaddr *ifa; |
1030 | |
1031 | if (dn_db->t3 <= dn_db->parms.t2) { |
1032 | if (dn_db->parms.timer3) { |
1033 | for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) { |
1034 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
1035 | dn_db->parms.timer3(dev, ifa); |
1036 | } |
1037 | } |
1038 | dn_db->t3 = dn_db->parms.t3; |
1039 | } else { |
1040 | dn_db->t3 -= dn_db->parms.t2; |
1041 | } |
1042 | |
1043 | dn_dev_set_timer(dev); |
1044 | } |
1045 | |
1046 | static void dn_dev_set_timer(struct net_device *dev) |
1047 | { |
1048 | struct dn_dev *dn_db = dev->dn_ptr; |
1049 | |
1050 | if (dn_db->parms.t2 > dn_db->parms.t3) |
1051 | dn_db->parms.t2 = dn_db->parms.t3; |
1052 | |
1053 | dn_db->timer.data = (unsigned long)dev; |
1054 | dn_db->timer.function = dn_dev_timer_func; |
1055 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); |
1056 | |
1057 | add_timer(&dn_db->timer); |
1058 | } |
1059 | |
1060 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1061 | { |
1062 | int i; |
1063 | struct dn_dev_parms *p = dn_dev_list; |
1064 | struct dn_dev *dn_db; |
1065 | |
1066 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { |
1067 | if (p->type == dev->type) |
1068 | break; |
1069 | } |
1070 | |
1071 | *err = -ENODEV; |
1072 | if (i == DN_DEV_LIST_SIZE) |
1073 | return NULL; |
1074 | |
1075 | *err = -ENOBUFS; |
1076 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1077 | return NULL; |
1078 | |
1079 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
1080 | smp_wmb(); |
1081 | dev->dn_ptr = dn_db; |
1082 | dn_db->dev = dev; |
1083 | init_timer(&dn_db->timer); |
1084 | |
1085 | dn_db->uptime = jiffies; |
1086 | |
1087 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); |
1088 | if (!dn_db->neigh_parms) { |
1089 | dev->dn_ptr = NULL; |
1090 | kfree(dn_db); |
1091 | return NULL; |
1092 | } |
1093 | |
1094 | if (dn_db->parms.up) { |
1095 | if (dn_db->parms.up(dev) < 0) { |
1096 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1097 | dev->dn_ptr = NULL; |
1098 | kfree(dn_db); |
1099 | return NULL; |
1100 | } |
1101 | } |
1102 | |
1103 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1104 | |
1105 | dn_dev_set_timer(dev); |
1106 | |
1107 | *err = 0; |
1108 | return dn_db; |
1109 | } |
1110 | |
1111 | |
1112 | /* |
1113 | * This processes a device up event. We only start up |
1114 | * the loopback device & ethernet devices with correct |
1115 | * MAC addreses automatically. Others must be started |
1116 | * specifically. |
1117 | * |
1118 | * FIXME: How should we configure the loopback address ? If we could dispense |
1119 | * with using decnet_address here and for autobind, it will be one less thing |
1120 | * for users to worry about setting up. |
1121 | */ |
1122 | |
1123 | void dn_dev_up(struct net_device *dev) |
1124 | { |
1125 | struct dn_ifaddr *ifa; |
1126 | __le16 addr = decnet_address; |
1127 | int maybe_default = 0; |
1128 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
1129 | |
1130 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) |
1131 | return; |
1132 | |
1133 | /* |
1134 | * Need to ensure that loopback device has a dn_db attached to it |
1135 | * to allow creation of neighbours against it, even though it might |
1136 | * not have a local address of its own. Might as well do the same for |
1137 | * all autoconfigured interfaces. |
1138 | */ |
1139 | if (dn_db == NULL) { |
1140 | int err; |
1141 | dn_db = dn_dev_create(dev, &err); |
1142 | if (dn_db == NULL) |
1143 | return; |
1144 | } |
1145 | |
1146 | if (dev->type == ARPHRD_ETHER) { |
1147 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) |
1148 | return; |
1149 | addr = dn_eth2dn(dev->dev_addr); |
1150 | maybe_default = 1; |
1151 | } |
1152 | |
1153 | if (addr == 0) |
1154 | return; |
1155 | |
1156 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
1157 | return; |
1158 | |
1159 | ifa->ifa_local = ifa->ifa_address = addr; |
1160 | ifa->ifa_flags = 0; |
1161 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; |
1162 | strcpy(ifa->ifa_label, dev->name); |
1163 | |
1164 | dn_dev_set_ifa(dev, ifa); |
1165 | |
1166 | /* |
1167 | * Automagically set the default device to the first automatically |
1168 | * configured ethernet card in the system. |
1169 | */ |
1170 | if (maybe_default) { |
1171 | dev_hold(dev); |
1172 | if (dn_dev_set_default(dev, 0)) |
1173 | dev_put(dev); |
1174 | } |
1175 | } |
1176 | |
1177 | static void dn_dev_delete(struct net_device *dev) |
1178 | { |
1179 | struct dn_dev *dn_db = dev->dn_ptr; |
1180 | |
1181 | if (dn_db == NULL) |
1182 | return; |
1183 | |
1184 | del_timer_sync(&dn_db->timer); |
1185 | dn_dev_sysctl_unregister(&dn_db->parms); |
1186 | dn_dev_check_default(dev); |
1187 | neigh_ifdown(&dn_neigh_table, dev); |
1188 | |
1189 | if (dn_db->parms.down) |
1190 | dn_db->parms.down(dev); |
1191 | |
1192 | dev->dn_ptr = NULL; |
1193 | |
1194 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1195 | neigh_ifdown(&dn_neigh_table, dev); |
1196 | |
1197 | if (dn_db->router) |
1198 | neigh_release(dn_db->router); |
1199 | if (dn_db->peer) |
1200 | neigh_release(dn_db->peer); |
1201 | |
1202 | kfree(dn_db); |
1203 | } |
1204 | |
1205 | void dn_dev_down(struct net_device *dev) |
1206 | { |
1207 | struct dn_dev *dn_db = dev->dn_ptr; |
1208 | struct dn_ifaddr *ifa; |
1209 | |
1210 | if (dn_db == NULL) |
1211 | return; |
1212 | |
1213 | while((ifa = dn_db->ifa_list) != NULL) { |
1214 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
1215 | dn_dev_free_ifa(ifa); |
1216 | } |
1217 | |
1218 | dn_dev_delete(dev); |
1219 | } |
1220 | |
1221 | void dn_dev_init_pkt(struct sk_buff *skb) |
1222 | { |
1223 | return; |
1224 | } |
1225 | |
1226 | void dn_dev_veri_pkt(struct sk_buff *skb) |
1227 | { |
1228 | return; |
1229 | } |
1230 | |
1231 | void dn_dev_hello(struct sk_buff *skb) |
1232 | { |
1233 | return; |
1234 | } |
1235 | |
1236 | void dn_dev_devices_off(void) |
1237 | { |
1238 | struct net_device *dev; |
1239 | |
1240 | rtnl_lock(); |
1241 | for_each_netdev(&init_net, dev) |
1242 | dn_dev_down(dev); |
1243 | rtnl_unlock(); |
1244 | |
1245 | } |
1246 | |
1247 | void dn_dev_devices_on(void) |
1248 | { |
1249 | struct net_device *dev; |
1250 | |
1251 | rtnl_lock(); |
1252 | for_each_netdev(&init_net, dev) { |
1253 | if (dev->flags & IFF_UP) |
1254 | dn_dev_up(dev); |
1255 | } |
1256 | rtnl_unlock(); |
1257 | } |
1258 | |
1259 | int register_dnaddr_notifier(struct notifier_block *nb) |
1260 | { |
1261 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1262 | } |
1263 | |
1264 | int unregister_dnaddr_notifier(struct notifier_block *nb) |
1265 | { |
1266 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1267 | } |
1268 | |
1269 | #ifdef CONFIG_PROC_FS |
1270 | static inline int is_dn_dev(struct net_device *dev) |
1271 | { |
1272 | return dev->dn_ptr != NULL; |
1273 | } |
1274 | |
1275 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
1276 | __acquires(rcu) |
1277 | { |
1278 | int i; |
1279 | struct net_device *dev; |
1280 | |
1281 | rcu_read_lock(); |
1282 | |
1283 | if (*pos == 0) |
1284 | return SEQ_START_TOKEN; |
1285 | |
1286 | i = 1; |
1287 | for_each_netdev_rcu(&init_net, dev) { |
1288 | if (!is_dn_dev(dev)) |
1289 | continue; |
1290 | |
1291 | if (i++ == *pos) |
1292 | return dev; |
1293 | } |
1294 | |
1295 | return NULL; |
1296 | } |
1297 | |
1298 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1299 | { |
1300 | struct net_device *dev; |
1301 | |
1302 | ++*pos; |
1303 | |
1304 | dev = (struct net_device *)v; |
1305 | if (v == SEQ_START_TOKEN) |
1306 | dev = net_device_entry(&init_net.dev_base_head); |
1307 | |
1308 | for_each_netdev_continue_rcu(&init_net, dev) { |
1309 | if (!is_dn_dev(dev)) |
1310 | continue; |
1311 | |
1312 | return dev; |
1313 | } |
1314 | |
1315 | return NULL; |
1316 | } |
1317 | |
1318 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) |
1319 | __releases(rcu) |
1320 | { |
1321 | rcu_read_unlock(); |
1322 | } |
1323 | |
1324 | static char *dn_type2asc(char type) |
1325 | { |
1326 | switch(type) { |
1327 | case DN_DEV_BCAST: |
1328 | return "B"; |
1329 | case DN_DEV_UCAST: |
1330 | return "U"; |
1331 | case DN_DEV_MPOINT: |
1332 | return "M"; |
1333 | } |
1334 | |
1335 | return "?"; |
1336 | } |
1337 | |
1338 | static int dn_dev_seq_show(struct seq_file *seq, void *v) |
1339 | { |
1340 | if (v == SEQ_START_TOKEN) |
1341 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1342 | else { |
1343 | struct net_device *dev = v; |
1344 | char peer_buf[DN_ASCBUF_LEN]; |
1345 | char router_buf[DN_ASCBUF_LEN]; |
1346 | struct dn_dev *dn_db = dev->dn_ptr; |
1347 | |
1348 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1349 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
1350 | dev->name ? dev->name : "???", |
1351 | dn_type2asc(dn_db->parms.mode), |
1352 | 0, 0, |
1353 | dn_db->t3, dn_db->parms.t3, |
1354 | mtu2blksize(dev), |
1355 | dn_db->parms.priority, |
1356 | dn_db->parms.state, dn_db->parms.name, |
1357 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1358 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); |
1359 | } |
1360 | return 0; |
1361 | } |
1362 | |
1363 | static const struct seq_operations dn_dev_seq_ops = { |
1364 | .start = dn_dev_seq_start, |
1365 | .next = dn_dev_seq_next, |
1366 | .stop = dn_dev_seq_stop, |
1367 | .show = dn_dev_seq_show, |
1368 | }; |
1369 | |
1370 | static int dn_dev_seq_open(struct inode *inode, struct file *file) |
1371 | { |
1372 | return seq_open(file, &dn_dev_seq_ops); |
1373 | } |
1374 | |
1375 | static const struct file_operations dn_dev_seq_fops = { |
1376 | .owner = THIS_MODULE, |
1377 | .open = dn_dev_seq_open, |
1378 | .read = seq_read, |
1379 | .llseek = seq_lseek, |
1380 | .release = seq_release, |
1381 | }; |
1382 | |
1383 | #endif /* CONFIG_PROC_FS */ |
1384 | |
1385 | static int addr[2]; |
1386 | module_param_array(addr, int, NULL, 0444); |
1387 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); |
1388 | |
1389 | void __init dn_dev_init(void) |
1390 | { |
1391 | if (addr[0] > 63 || addr[0] < 0) { |
1392 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); |
1393 | return; |
1394 | } |
1395 | |
1396 | if (addr[1] > 1023 || addr[1] < 0) { |
1397 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); |
1398 | return; |
1399 | } |
1400 | |
1401 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1402 | |
1403 | dn_dev_devices_on(); |
1404 | |
1405 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL); |
1406 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL); |
1407 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr); |
1408 | |
1409 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
1410 | |
1411 | #ifdef CONFIG_SYSCTL |
1412 | { |
1413 | int i; |
1414 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
1415 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); |
1416 | } |
1417 | #endif /* CONFIG_SYSCTL */ |
1418 | } |
1419 | |
1420 | void __exit dn_dev_cleanup(void) |
1421 | { |
1422 | #ifdef CONFIG_SYSCTL |
1423 | { |
1424 | int i; |
1425 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
1426 | dn_dev_sysctl_unregister(&dn_dev_list[i]); |
1427 | } |
1428 | #endif /* CONFIG_SYSCTL */ |
1429 | |
1430 | proc_net_remove(&init_net, "decnet_dev"); |
1431 | |
1432 | dn_dev_devices_off(); |
1433 | } |
1434 |
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