Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
4fc268d2 | 27 | #include <linux/capability.h> |
1da177e4 LT |
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> | |
1823730f | 37 | #include <linux/if_addr.h> |
1da177e4 LT |
38 | #include <linux/if_arp.h> |
39 | #include <linux/if_ether.h> | |
40 | #include <linux/skbuff.h> | |
1da177e4 LT |
41 | #include <linux/sysctl.h> |
42 | #include <linux/notifier.h> | |
5a0e3ad6 | 43 | #include <linux/slab.h> |
b5c5c36d | 44 | #include <linux/jiffies.h> |
1da177e4 | 45 | #include <asm/uaccess.h> |
457c4cbc | 46 | #include <net/net_namespace.h> |
1da177e4 LT |
47 | #include <net/neighbour.h> |
48 | #include <net/dst.h> | |
49 | #include <net/flow.h> | |
a8731cbf | 50 | #include <net/fib_rules.h> |
a6f01cac | 51 | #include <net/netlink.h> |
1da177e4 LT |
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 | */ | |
c4ea94ab | 70 | __le16 decnet_address = 0; |
1da177e4 | 71 | |
e5c140a3 | 72 | static DEFINE_SPINLOCK(dndev_lock); |
1da177e4 | 73 | static struct net_device *decnet_default_device; |
e041c683 | 74 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
1da177e4 LT |
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); | |
b020b942 | 78 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
1da177e4 LT |
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", | |
1da177e4 LT |
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", | |
1da177e4 LT |
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", | |
1da177e4 LT |
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", | |
1da177e4 LT |
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", | |
1da177e4 LT |
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", | |
1da177e4 LT |
144 | .timer3 = dn_send_brd_hello, |
145 | } | |
146 | }; | |
147 | ||
8b14a536 | 148 | #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
1da177e4 | 149 | |
8fa0b315 | 150 | #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
1da177e4 LT |
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 | ||
fe2c6338 | 162 | static int dn_forwarding_proc(struct ctl_table *, int, |
1da177e4 | 163 | void __user *, size_t *, loff_t *); |
1da177e4 LT |
164 | static struct dn_dev_sysctl_table { |
165 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 166 | struct ctl_table dn_dev_vars[5]; |
1da177e4 LT |
167 | } dn_dev_sysctl = { |
168 | NULL, | |
169 | { | |
170 | { | |
1da177e4 LT |
171 | .procname = "forwarding", |
172 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), | |
173 | .maxlen = sizeof(int), | |
174 | .mode = 0644, | |
175 | .proc_handler = dn_forwarding_proc, | |
1da177e4 LT |
176 | }, |
177 | { | |
1da177e4 LT |
178 | .procname = "priority", |
179 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), | |
180 | .maxlen = sizeof(int), | |
181 | .mode = 0644, | |
182 | .proc_handler = proc_dointvec_minmax, | |
1da177e4 LT |
183 | .extra1 = &min_priority, |
184 | .extra2 = &max_priority | |
185 | }, | |
186 | { | |
1da177e4 LT |
187 | .procname = "t2", |
188 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), | |
189 | .maxlen = sizeof(int), | |
190 | .mode = 0644, | |
191 | .proc_handler = proc_dointvec_minmax, | |
1da177e4 LT |
192 | .extra1 = &min_t2, |
193 | .extra2 = &max_t2 | |
194 | }, | |
195 | { | |
1da177e4 LT |
196 | .procname = "t3", |
197 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), | |
198 | .maxlen = sizeof(int), | |
199 | .mode = 0644, | |
200 | .proc_handler = proc_dointvec_minmax, | |
1da177e4 LT |
201 | .extra1 = &min_t3, |
202 | .extra2 = &max_t3 | |
203 | }, | |
204 | {0} | |
205 | }, | |
1da177e4 LT |
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 | ||
9bdcc88f | 213 | char path[sizeof("net/decnet/conf/") + IFNAMSIZ]; |
3151a9ab | 214 | |
c66b721a | 215 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
216 | if (t == NULL) |
217 | return; | |
218 | ||
1da177e4 LT |
219 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
220 | long offset = (long)t->dn_dev_vars[i].data; | |
221 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
1da177e4 LT |
222 | } |
223 | ||
9bdcc88f EB |
224 | snprintf(path, sizeof(path), "net/decnet/conf/%s", |
225 | dev? dev->name : parms->name); | |
1da177e4 | 226 | |
1da177e4 LT |
227 | t->dn_dev_vars[0].extra1 = (void *)dev; |
228 | ||
9bdcc88f | 229 | t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars); |
1da177e4 LT |
230 | if (t->sysctl_header == NULL) |
231 | kfree(t); | |
232 | else | |
233 | parms->sysctl = t; | |
234 | } | |
235 | ||
236 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
237 | { | |
238 | if (parms->sysctl) { | |
239 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
240 | parms->sysctl = NULL; | |
5dd3df10 | 241 | unregister_net_sysctl_table(t->sysctl_header); |
1da177e4 LT |
242 | kfree(t); |
243 | } | |
244 | } | |
245 | ||
fe2c6338 | 246 | static int dn_forwarding_proc(struct ctl_table *table, int write, |
1da177e4 LT |
247 | void __user *buffer, |
248 | size_t *lenp, loff_t *ppos) | |
249 | { | |
250 | #ifdef CONFIG_DECNET_ROUTER | |
251 | struct net_device *dev = table->extra1; | |
252 | struct dn_dev *dn_db; | |
253 | int err; | |
254 | int tmp, old; | |
255 | ||
256 | if (table->extra1 == NULL) | |
257 | return -EINVAL; | |
258 | ||
fc766e4c | 259 | dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
260 | old = dn_db->parms.forwarding; |
261 | ||
8d65af78 | 262 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
263 | |
264 | if ((err >= 0) && write) { | |
265 | if (dn_db->parms.forwarding < 0) | |
266 | dn_db->parms.forwarding = 0; | |
267 | if (dn_db->parms.forwarding > 2) | |
268 | dn_db->parms.forwarding = 2; | |
269 | /* | |
270 | * What an ugly hack this is... its works, just. It | |
271 | * would be nice if sysctl/proc were just that little | |
272 | * bit more flexible so I don't have to write a special | |
273 | * routine, or suffer hacks like this - SJW | |
274 | */ | |
275 | tmp = dn_db->parms.forwarding; | |
276 | dn_db->parms.forwarding = old; | |
277 | if (dn_db->parms.down) | |
278 | dn_db->parms.down(dev); | |
279 | dn_db->parms.forwarding = tmp; | |
280 | if (dn_db->parms.up) | |
281 | dn_db->parms.up(dev); | |
282 | } | |
283 | ||
284 | return err; | |
285 | #else | |
286 | return -EINVAL; | |
287 | #endif | |
288 | } | |
289 | ||
1da177e4 LT |
290 | #else /* CONFIG_SYSCTL */ |
291 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
292 | { | |
293 | } | |
294 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
295 | { | |
296 | } | |
297 | ||
298 | #endif /* CONFIG_SYSCTL */ | |
299 | ||
300 | static inline __u16 mtu2blksize(struct net_device *dev) | |
301 | { | |
302 | u32 blksize = dev->mtu; | |
303 | if (blksize > 0xffff) | |
304 | blksize = 0xffff; | |
305 | ||
306 | if (dev->type == ARPHRD_ETHER || | |
307 | dev->type == ARPHRD_PPP || | |
308 | dev->type == ARPHRD_IPGRE || | |
309 | dev->type == ARPHRD_LOOPBACK) | |
310 | blksize -= 2; | |
311 | ||
312 | return (__u16)blksize; | |
313 | } | |
314 | ||
315 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
316 | { | |
317 | struct dn_ifaddr *ifa; | |
318 | ||
0da974f4 | 319 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
320 | |
321 | return ifa; | |
322 | } | |
323 | ||
fc766e4c | 324 | static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
1da177e4 | 325 | { |
1e547757 | 326 | kfree_rcu(ifa, rcu); |
fc766e4c ED |
327 | } |
328 | ||
329 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) | |
330 | { | |
331 | struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); | |
1da177e4 LT |
332 | unsigned char mac_addr[6]; |
333 | struct net_device *dev = dn_db->dev; | |
334 | ||
335 | ASSERT_RTNL(); | |
336 | ||
337 | *ifap = ifa1->ifa_next; | |
338 | ||
339 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 340 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 341 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
22bedad3 | 342 | dev_mc_del(dev, mac_addr); |
1da177e4 LT |
343 | } |
344 | } | |
345 | ||
b020b942 | 346 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
e041c683 | 347 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
348 | if (destroy) { |
349 | dn_dev_free_ifa(ifa1); | |
350 | ||
351 | if (dn_db->ifa_list == NULL) | |
352 | dn_dev_delete(dn_db->dev); | |
353 | } | |
354 | } | |
355 | ||
356 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
357 | { | |
358 | struct net_device *dev = dn_db->dev; | |
359 | struct dn_ifaddr *ifa1; | |
360 | unsigned char mac_addr[6]; | |
361 | ||
362 | ASSERT_RTNL(); | |
363 | ||
429eb0fa | 364 | /* Check for duplicates */ |
fc766e4c ED |
365 | for (ifa1 = rtnl_dereference(dn_db->ifa_list); |
366 | ifa1 != NULL; | |
367 | ifa1 = rtnl_dereference(ifa1->ifa_next)) { | |
1da177e4 LT |
368 | if (ifa1->ifa_local == ifa->ifa_local) |
369 | return -EEXIST; | |
370 | } | |
371 | ||
372 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 373 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 374 | dn_dn2eth(mac_addr, ifa->ifa_local); |
22bedad3 | 375 | dev_mc_add(dev, mac_addr); |
1da177e4 LT |
376 | } |
377 | } | |
378 | ||
379 | ifa->ifa_next = dn_db->ifa_list; | |
cf778b00 | 380 | rcu_assign_pointer(dn_db->ifa_list, ifa); |
1da177e4 | 381 | |
b020b942 | 382 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 383 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
384 | |
385 | return 0; | |
386 | } | |
387 | ||
388 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
389 | { | |
fc766e4c | 390 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
391 | int rv; |
392 | ||
393 | if (dn_db == NULL) { | |
394 | int err; | |
395 | dn_db = dn_dev_create(dev, &err); | |
396 | if (dn_db == NULL) | |
397 | return err; | |
398 | } | |
399 | ||
400 | ifa->ifa_dev = dn_db; | |
401 | ||
402 | if (dev->flags & IFF_LOOPBACK) | |
403 | ifa->ifa_scope = RT_SCOPE_HOST; | |
404 | ||
405 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
406 | if (rv) | |
407 | dn_dev_free_ifa(ifa); | |
408 | return rv; | |
409 | } | |
410 | ||
411 | ||
412 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
413 | { | |
414 | char buffer[DN_IFREQ_SIZE]; | |
415 | struct ifreq *ifr = (struct ifreq *)buffer; | |
416 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
417 | struct dn_dev *dn_db; | |
418 | struct net_device *dev; | |
fc766e4c ED |
419 | struct dn_ifaddr *ifa = NULL; |
420 | struct dn_ifaddr __rcu **ifap = NULL; | |
1da177e4 LT |
421 | int ret = 0; |
422 | ||
423 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
424 | return -EFAULT; | |
425 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
426 | ||
881d966b | 427 | dev_load(&init_net, ifr->ifr_name); |
1da177e4 | 428 | |
06f8fe11 JP |
429 | switch (cmd) { |
430 | case SIOCGIFADDR: | |
431 | break; | |
432 | case SIOCSIFADDR: | |
433 | if (!capable(CAP_NET_ADMIN)) | |
434 | return -EACCES; | |
435 | if (sdn->sdn_family != AF_DECnet) | |
1da177e4 | 436 | return -EINVAL; |
06f8fe11 JP |
437 | break; |
438 | default: | |
439 | return -EINVAL; | |
1da177e4 LT |
440 | } |
441 | ||
442 | rtnl_lock(); | |
443 | ||
881d966b | 444 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
1da177e4 LT |
445 | ret = -ENODEV; |
446 | goto done; | |
447 | } | |
448 | ||
fc766e4c ED |
449 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { |
450 | for (ifap = &dn_db->ifa_list; | |
451 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
452 | ifap = &ifa->ifa_next) | |
1da177e4 LT |
453 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
454 | break; | |
455 | } | |
456 | ||
457 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
458 | ret = -EADDRNOTAVAIL; | |
459 | goto done; | |
460 | } | |
461 | ||
06f8fe11 JP |
462 | switch (cmd) { |
463 | case SIOCGIFADDR: | |
464 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; | |
465 | goto rarok; | |
466 | ||
467 | case SIOCSIFADDR: | |
468 | if (!ifa) { | |
469 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
470 | ret = -ENOBUFS; | |
471 | break; | |
1da177e4 | 472 | } |
06f8fe11 JP |
473 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
474 | } else { | |
475 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
476 | break; | |
477 | dn_dev_del_ifa(dn_db, ifap, 0); | |
478 | } | |
1da177e4 | 479 | |
06f8fe11 | 480 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
1da177e4 | 481 | |
06f8fe11 | 482 | ret = dn_dev_set_ifa(dev, ifa); |
1da177e4 LT |
483 | } |
484 | done: | |
485 | rtnl_unlock(); | |
486 | ||
487 | return ret; | |
488 | rarok: | |
489 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
490 | ret = -EFAULT; | |
491 | goto done; | |
492 | } | |
493 | ||
494 | struct net_device *dn_dev_get_default(void) | |
495 | { | |
496 | struct net_device *dev; | |
e5c140a3 | 497 | |
498 | spin_lock(&dndev_lock); | |
1da177e4 LT |
499 | dev = decnet_default_device; |
500 | if (dev) { | |
501 | if (dev->dn_ptr) | |
502 | dev_hold(dev); | |
503 | else | |
504 | dev = NULL; | |
505 | } | |
e5c140a3 | 506 | spin_unlock(&dndev_lock); |
507 | ||
1da177e4 LT |
508 | return dev; |
509 | } | |
510 | ||
511 | int dn_dev_set_default(struct net_device *dev, int force) | |
512 | { | |
513 | struct net_device *old = NULL; | |
514 | int rv = -EBUSY; | |
515 | if (!dev->dn_ptr) | |
516 | return -ENODEV; | |
e5c140a3 | 517 | |
518 | spin_lock(&dndev_lock); | |
1da177e4 LT |
519 | if (force || decnet_default_device == NULL) { |
520 | old = decnet_default_device; | |
521 | decnet_default_device = dev; | |
522 | rv = 0; | |
523 | } | |
e5c140a3 | 524 | spin_unlock(&dndev_lock); |
525 | ||
1da177e4 | 526 | if (old) |
6a57b2ee | 527 | dev_put(old); |
1da177e4 LT |
528 | return rv; |
529 | } | |
530 | ||
531 | static void dn_dev_check_default(struct net_device *dev) | |
532 | { | |
e5c140a3 | 533 | spin_lock(&dndev_lock); |
1da177e4 LT |
534 | if (dev == decnet_default_device) { |
535 | decnet_default_device = NULL; | |
536 | } else { | |
537 | dev = NULL; | |
538 | } | |
e5c140a3 | 539 | spin_unlock(&dndev_lock); |
540 | ||
1da177e4 LT |
541 | if (dev) |
542 | dev_put(dev); | |
543 | } | |
544 | ||
b4d745db ED |
545 | /* |
546 | * Called with RTNL | |
547 | */ | |
1da177e4 LT |
548 | static struct dn_dev *dn_dev_by_index(int ifindex) |
549 | { | |
550 | struct net_device *dev; | |
551 | struct dn_dev *dn_dev = NULL; | |
b4d745db ED |
552 | |
553 | dev = __dev_get_by_index(&init_net, ifindex); | |
554 | if (dev) | |
fc766e4c | 555 | dn_dev = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
556 | |
557 | return dn_dev; | |
558 | } | |
559 | ||
ef7c79ed | 560 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
4a89c256 TG |
561 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
562 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
563 | [IFA_LABEL] = { .type = NLA_STRING, | |
564 | .len = IFNAMSIZ - 1 }, | |
9a32b860 | 565 | [IFA_FLAGS] = { .type = NLA_U32 }, |
4a89c256 TG |
566 | }; |
567 | ||
661d2967 | 568 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 569 | { |
3b1e0a65 | 570 | struct net *net = sock_net(skb->sk); |
4a89c256 | 571 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 572 | struct dn_dev *dn_db; |
4a89c256 | 573 | struct ifaddrmsg *ifm; |
fc766e4c ED |
574 | struct dn_ifaddr *ifa; |
575 | struct dn_ifaddr __rcu **ifap; | |
b854272b DL |
576 | int err = -EINVAL; |
577 | ||
90f62cf3 | 578 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
dfc47ef8 EB |
579 | return -EPERM; |
580 | ||
09ad9bc7 | 581 | if (!net_eq(net, &init_net)) |
b854272b | 582 | goto errout; |
4a89c256 TG |
583 | |
584 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
585 | if (err < 0) | |
586 | goto errout; | |
1da177e4 | 587 | |
3ccd8624 | 588 | err = -ENODEV; |
4a89c256 | 589 | ifm = nlmsg_data(nlh); |
1da177e4 | 590 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
591 | goto errout; |
592 | ||
3ccd8624 | 593 | err = -EADDRNOTAVAIL; |
fc766e4c ED |
594 | for (ifap = &dn_db->ifa_list; |
595 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
596 | ifap = &ifa->ifa_next) { | |
4a89c256 TG |
597 | if (tb[IFA_LOCAL] && |
598 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
599 | continue; | |
1da177e4 | 600 | |
4a89c256 | 601 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
602 | continue; |
603 | ||
604 | dn_dev_del_ifa(dn_db, ifap, 1); | |
605 | return 0; | |
606 | } | |
607 | ||
4a89c256 TG |
608 | errout: |
609 | return err; | |
1da177e4 LT |
610 | } |
611 | ||
661d2967 | 612 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 613 | { |
3b1e0a65 | 614 | struct net *net = sock_net(skb->sk); |
4a89c256 | 615 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
616 | struct net_device *dev; |
617 | struct dn_dev *dn_db; | |
4a89c256 | 618 | struct ifaddrmsg *ifm; |
1da177e4 | 619 | struct dn_ifaddr *ifa; |
4a89c256 TG |
620 | int err; |
621 | ||
90f62cf3 | 622 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
dfc47ef8 EB |
623 | return -EPERM; |
624 | ||
09ad9bc7 | 625 | if (!net_eq(net, &init_net)) |
b854272b DL |
626 | return -EINVAL; |
627 | ||
4a89c256 TG |
628 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
629 | if (err < 0) | |
630 | return err; | |
1da177e4 | 631 | |
4a89c256 | 632 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
633 | return -EINVAL; |
634 | ||
4a89c256 | 635 | ifm = nlmsg_data(nlh); |
881d966b | 636 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4 LT |
637 | return -ENODEV; |
638 | ||
fc766e4c | 639 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
1da177e4 LT |
640 | dn_db = dn_dev_create(dev, &err); |
641 | if (!dn_db) | |
642 | return err; | |
643 | } | |
429eb0fa | 644 | |
1da177e4 LT |
645 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
646 | return -ENOBUFS; | |
647 | ||
4a89c256 TG |
648 | if (tb[IFA_ADDRESS] == NULL) |
649 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
650 | ||
651 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
652 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
9a32b860 JP |
653 | ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
654 | ifm->ifa_flags; | |
1da177e4 LT |
655 | ifa->ifa_scope = ifm->ifa_scope; |
656 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
657 | |
658 | if (tb[IFA_LABEL]) | |
659 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
660 | else |
661 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
662 | ||
4a89c256 TG |
663 | err = dn_dev_insert_ifa(dn_db, ifa); |
664 | if (err) | |
1da177e4 | 665 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
666 | |
667 | return err; | |
1da177e4 LT |
668 | } |
669 | ||
a6f01cac TG |
670 | static inline size_t dn_ifaddr_nlmsg_size(void) |
671 | { | |
672 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
673 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
674 | + nla_total_size(2) /* IFA_ADDRESS */ | |
9a32b860 JP |
675 | + nla_total_size(2) /* IFA_LOCAL */ |
676 | + nla_total_size(4); /* IFA_FLAGS */ | |
a6f01cac TG |
677 | } |
678 | ||
4a89c256 | 679 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
15e47304 | 680 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
681 | { |
682 | struct ifaddrmsg *ifm; | |
683 | struct nlmsghdr *nlh; | |
9a32b860 | 684 | u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; |
1da177e4 | 685 | |
15e47304 | 686 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
4a89c256 | 687 | if (nlh == NULL) |
26932566 | 688 | return -EMSGSIZE; |
1da177e4 | 689 | |
4a89c256 | 690 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
691 | ifm->ifa_family = AF_DECnet; |
692 | ifm->ifa_prefixlen = 16; | |
9a32b860 | 693 | ifm->ifa_flags = ifa_flags; |
1da177e4 LT |
694 | ifm->ifa_scope = ifa->ifa_scope; |
695 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 696 | |
b21dddb9 DM |
697 | if ((ifa->ifa_address && |
698 | nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) || | |
699 | (ifa->ifa_local && | |
700 | nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) || | |
701 | (ifa->ifa_label[0] && | |
9a32b860 JP |
702 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
703 | nla_put_u32(skb, IFA_FLAGS, ifa_flags)) | |
b21dddb9 | 704 | goto nla_put_failure; |
053c095a JB |
705 | nlmsg_end(skb, nlh); |
706 | return 0; | |
4a89c256 TG |
707 | |
708 | nla_put_failure: | |
26932566 PM |
709 | nlmsg_cancel(skb, nlh); |
710 | return -EMSGSIZE; | |
1da177e4 LT |
711 | } |
712 | ||
b020b942 | 713 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
714 | { |
715 | struct sk_buff *skb; | |
dc738dd8 | 716 | int err = -ENOBUFS; |
1da177e4 | 717 | |
a6f01cac | 718 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
719 | if (skb == NULL) |
720 | goto errout; | |
721 | ||
4a89c256 | 722 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
723 | if (err < 0) { |
724 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
725 | WARN_ON(err == -EMSGSIZE); | |
726 | kfree_skb(skb); | |
727 | goto errout; | |
728 | } | |
1ce85fe4 PNA |
729 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
730 | return; | |
dc738dd8 TG |
731 | errout: |
732 | if (err < 0) | |
97c53cac | 733 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4 LT |
734 | } |
735 | ||
4a89c256 | 736 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 737 | { |
3b1e0a65 | 738 | struct net *net = sock_net(skb->sk); |
4a89c256 | 739 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
740 | struct net_device *dev; |
741 | struct dn_dev *dn_db; | |
742 | struct dn_ifaddr *ifa; | |
743 | ||
09ad9bc7 | 744 | if (!net_eq(net, &init_net)) |
b854272b DL |
745 | return 0; |
746 | ||
4a89c256 TG |
747 | skip_ndevs = cb->args[0]; |
748 | skip_naddr = cb->args[1]; | |
749 | ||
7562f876 | 750 | idx = 0; |
e67f88dd ED |
751 | rcu_read_lock(); |
752 | for_each_netdev_rcu(&init_net, dev) { | |
4a89c256 | 753 | if (idx < skip_ndevs) |
7562f876 | 754 | goto cont; |
4a89c256 TG |
755 | else if (idx > skip_ndevs) { |
756 | /* Only skip over addresses for first dev dumped | |
757 | * in this iteration (idx == skip_ndevs) */ | |
758 | skip_naddr = 0; | |
759 | } | |
760 | ||
e67f88dd | 761 | if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
7562f876 | 762 | goto cont; |
1da177e4 | 763 | |
e67f88dd ED |
764 | for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; |
765 | ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { | |
4a89c256 | 766 | if (dn_idx < skip_naddr) |
a2221f30 | 767 | continue; |
1da177e4 | 768 | |
15e47304 | 769 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid, |
4a89c256 TG |
770 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
771 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
772 | goto done; |
773 | } | |
7562f876 PE |
774 | cont: |
775 | idx++; | |
1da177e4 LT |
776 | } |
777 | done: | |
e67f88dd | 778 | rcu_read_unlock(); |
1da177e4 LT |
779 | cb->args[0] = idx; |
780 | cb->args[1] = dn_idx; | |
781 | ||
782 | return skb->len; | |
783 | } | |
784 | ||
c4ea94ab | 785 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 | 786 | { |
fc766e4c | 787 | struct dn_dev *dn_db; |
1da177e4 LT |
788 | struct dn_ifaddr *ifa; |
789 | int rv = -ENODEV; | |
41bdecf1 | 790 | |
fc766e4c ED |
791 | rcu_read_lock(); |
792 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
793 | if (dn_db == NULL) |
794 | goto out; | |
41bdecf1 | 795 | |
fc766e4c | 796 | ifa = rcu_dereference(dn_db->ifa_list); |
1da177e4 LT |
797 | if (ifa != NULL) { |
798 | *addr = ifa->ifa_local; | |
799 | rv = 0; | |
800 | } | |
801 | out: | |
fc766e4c | 802 | rcu_read_unlock(); |
1da177e4 LT |
803 | return rv; |
804 | } | |
805 | ||
429eb0fa | 806 | /* |
1da177e4 LT |
807 | * Find a default address to bind to. |
808 | * | |
809 | * This is one of those areas where the initial VMS concepts don't really | |
810 | * map onto the Linux concepts, and since we introduced multiple addresses | |
811 | * per interface we have to cope with slightly odd ways of finding out what | |
812 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
813 | * a sensible default. Eventually the routing code will take care of all the | |
814 | * nasties for us I hope. | |
815 | */ | |
c4ea94ab | 816 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
817 | { |
818 | struct net_device *dev; | |
819 | int rv; | |
820 | dev = dn_dev_get_default(); | |
821 | last_chance: | |
822 | if (dev) { | |
1da177e4 | 823 | rv = dn_dev_get_first(dev, addr); |
1da177e4 | 824 | dev_put(dev); |
2774c7ab | 825 | if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4 LT |
826 | return rv; |
827 | } | |
2774c7ab | 828 | dev = init_net.loopback_dev; |
1da177e4 LT |
829 | dev_hold(dev); |
830 | goto last_chance; | |
831 | } | |
832 | ||
833 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
834 | { | |
429eb0fa YH |
835 | struct endnode_hello_message *msg; |
836 | struct sk_buff *skb = NULL; | |
837 | __le16 *pktlen; | |
fc766e4c | 838 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 | 839 | |
429eb0fa | 840 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
841 | return; |
842 | ||
429eb0fa | 843 | skb->dev = dev; |
1da177e4 | 844 | |
429eb0fa | 845 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 846 | |
429eb0fa YH |
847 | msg->msgflg = 0x0D; |
848 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 849 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa | 850 | msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa8 | 851 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fa YH |
852 | msg->area = 0x00; |
853 | memset(msg->seed, 0, 8); | |
854 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
855 | |
856 | if (dn_db->router) { | |
857 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
858 | dn_dn2eth(msg->neighbor, dn->addr); | |
859 | } | |
860 | ||
c4106aa8 | 861 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fa YH |
862 | msg->mpd = 0x00; |
863 | msg->datalen = 0x02; | |
864 | memset(msg->data, 0xAA, 2); | |
865 | ||
866 | pktlen = (__le16 *)skb_push(skb,2); | |
c4106aa8 | 867 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 868 | |
c1d2bbe1 | 869 | skb_reset_network_header(skb); |
1da177e4 LT |
870 | |
871 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
872 | } | |
873 | ||
874 | ||
875 | #define DRDELAY (5 * HZ) | |
876 | ||
877 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
878 | { | |
879 | /* First check time since device went up */ | |
b5c5c36d | 880 | if (time_before(jiffies, dn_db->uptime + DRDELAY)) |
1da177e4 LT |
881 | return 0; |
882 | ||
883 | /* If there is no router, then yes... */ | |
884 | if (!dn_db->router) | |
885 | return 1; | |
886 | ||
887 | /* otherwise only if we have a higher priority or.. */ | |
888 | if (dn->priority < dn_db->parms.priority) | |
889 | return 1; | |
890 | ||
891 | /* if we have equal priority and a higher node number */ | |
892 | if (dn->priority != dn_db->parms.priority) | |
893 | return 0; | |
894 | ||
c4106aa8 | 895 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4 LT |
896 | return 1; |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
902 | { | |
903 | int n; | |
fc766e4c | 904 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
905 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
906 | struct sk_buff *skb; | |
907 | size_t size; | |
908 | unsigned char *ptr; | |
909 | unsigned char *i1, *i2; | |
c4ea94ab | 910 | __le16 *pktlen; |
1da177e4 LT |
911 | char *src; |
912 | ||
913 | if (mtu2blksize(dev) < (26 + 7)) | |
914 | return; | |
915 | ||
916 | n = mtu2blksize(dev) - 26; | |
917 | n /= 7; | |
918 | ||
919 | if (n > 32) | |
920 | n = 32; | |
921 | ||
922 | size = 2 + 26 + 7 * n; | |
923 | ||
924 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
925 | return; | |
926 | ||
927 | skb->dev = dev; | |
928 | ptr = skb_put(skb, size); | |
929 | ||
930 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
931 | *ptr++ = 2; /* ECO */ | |
932 | *ptr++ = 0; | |
933 | *ptr++ = 0; | |
934 | dn_dn2eth(ptr, ifa->ifa_local); | |
935 | src = ptr; | |
936 | ptr += ETH_ALEN; | |
429eb0fa | 937 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 938 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa8 | 939 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4 | 940 | ptr += 2; |
429eb0fa | 941 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 942 | *ptr++ = 0; /* Area: Reserved */ |
c4106aa8 | 943 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
944 | ptr += 2; |
945 | *ptr++ = 0; /* MPD: Reserved */ | |
946 | i1 = ptr++; | |
947 | memset(ptr, 0, 7); /* Name: Reserved */ | |
948 | ptr += 7; | |
949 | i2 = ptr++; | |
950 | ||
951 | n = dn_neigh_elist(dev, ptr, n); | |
952 | ||
953 | *i2 = 7 * n; | |
954 | *i1 = 8 + *i2; | |
955 | ||
956 | skb_trim(skb, (27 + *i2)); | |
957 | ||
c4ea94ab | 958 | pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa8 | 959 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 960 | |
c1d2bbe1 | 961 | skb_reset_network_header(skb); |
1da177e4 LT |
962 | |
963 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
964 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
965 | if (skb2) { | |
966 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
967 | } | |
968 | } | |
969 | ||
970 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
971 | } | |
972 | ||
973 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
974 | { | |
fc766e4c | 975 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
976 | |
977 | if (dn_db->parms.forwarding == 0) | |
978 | dn_send_endnode_hello(dev, ifa); | |
979 | else | |
980 | dn_send_router_hello(dev, ifa); | |
981 | } | |
982 | ||
983 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
984 | { | |
985 | int tdlen = 16; | |
986 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
987 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
988 | int i; | |
989 | unsigned char *ptr; | |
990 | char src[ETH_ALEN]; | |
991 | ||
992 | if (skb == NULL) | |
993 | return ; | |
994 | ||
995 | skb->dev = dev; | |
996 | skb_push(skb, dev->hard_header_len); | |
997 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
998 | ||
999 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 1000 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
1001 | ptr += 2; |
1002 | *ptr++ = tdlen; | |
1003 | ||
1004 | for(i = 0; i < tdlen; i++) | |
1005 | *ptr++ = 0252; | |
1006 | ||
1007 | dn_dn2eth(src, ifa->ifa_local); | |
1008 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1009 | } | |
1010 | ||
1011 | static int dn_eth_up(struct net_device *dev) | |
1012 | { | |
fc766e4c | 1013 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1014 | |
1015 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1016 | dev_mc_add(dev, dn_rt_all_end_mcast); |
1da177e4 | 1017 | else |
22bedad3 | 1018 | dev_mc_add(dev, dn_rt_all_rt_mcast); |
1da177e4 | 1019 | |
1da177e4 LT |
1020 | dn_db->use_long = 1; |
1021 | ||
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | static void dn_eth_down(struct net_device *dev) | |
1026 | { | |
fc766e4c | 1027 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1028 | |
1029 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1030 | dev_mc_del(dev, dn_rt_all_end_mcast); |
1da177e4 | 1031 | else |
22bedad3 | 1032 | dev_mc_del(dev, dn_rt_all_rt_mcast); |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | static void dn_dev_set_timer(struct net_device *dev); | |
1036 | ||
1037 | static void dn_dev_timer_func(unsigned long arg) | |
1038 | { | |
1039 | struct net_device *dev = (struct net_device *)arg; | |
fc766e4c | 1040 | struct dn_dev *dn_db; |
1da177e4 LT |
1041 | struct dn_ifaddr *ifa; |
1042 | ||
fc766e4c ED |
1043 | rcu_read_lock(); |
1044 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
1045 | if (dn_db->t3 <= dn_db->parms.t2) { |
1046 | if (dn_db->parms.timer3) { | |
fc766e4c ED |
1047 | for (ifa = rcu_dereference(dn_db->ifa_list); |
1048 | ifa; | |
1049 | ifa = rcu_dereference(ifa->ifa_next)) { | |
1da177e4 LT |
1050 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
1051 | dn_db->parms.timer3(dev, ifa); | |
1052 | } | |
1053 | } | |
1054 | dn_db->t3 = dn_db->parms.t3; | |
1055 | } else { | |
1056 | dn_db->t3 -= dn_db->parms.t2; | |
1057 | } | |
fc766e4c | 1058 | rcu_read_unlock(); |
1da177e4 LT |
1059 | dn_dev_set_timer(dev); |
1060 | } | |
1061 | ||
1062 | static void dn_dev_set_timer(struct net_device *dev) | |
1063 | { | |
fc766e4c | 1064 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1065 | |
1066 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1067 | dn_db->parms.t2 = dn_db->parms.t3; | |
1068 | ||
1069 | dn_db->timer.data = (unsigned long)dev; | |
1070 | dn_db->timer.function = dn_dev_timer_func; | |
1071 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1072 | ||
1073 | add_timer(&dn_db->timer); | |
1074 | } | |
1075 | ||
5eaa65b2 | 1076 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4 LT |
1077 | { |
1078 | int i; | |
1079 | struct dn_dev_parms *p = dn_dev_list; | |
1080 | struct dn_dev *dn_db; | |
1081 | ||
1082 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1083 | if (p->type == dev->type) | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | *err = -ENODEV; | |
1088 | if (i == DN_DEV_LIST_SIZE) | |
1089 | return NULL; | |
1090 | ||
1091 | *err = -ENOBUFS; | |
0da974f4 | 1092 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1093 | return NULL; |
1094 | ||
1da177e4 | 1095 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
fc766e4c | 1096 | |
cf778b00 | 1097 | rcu_assign_pointer(dev->dn_ptr, dn_db); |
1da177e4 LT |
1098 | dn_db->dev = dev; |
1099 | init_timer(&dn_db->timer); | |
1100 | ||
1101 | dn_db->uptime = jiffies; | |
95743deb EB |
1102 | |
1103 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1104 | if (!dn_db->neigh_parms) { | |
a9b3cd7f | 1105 | RCU_INIT_POINTER(dev->dn_ptr, NULL); |
95743deb EB |
1106 | kfree(dn_db); |
1107 | return NULL; | |
1108 | } | |
1109 | ||
1da177e4 LT |
1110 | if (dn_db->parms.up) { |
1111 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1112 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1113 | dev->dn_ptr = NULL; |
1114 | kfree(dn_db); | |
1115 | return NULL; | |
1116 | } | |
1117 | } | |
1118 | ||
1da177e4 LT |
1119 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1120 | ||
1121 | dn_dev_set_timer(dev); | |
1122 | ||
1123 | *err = 0; | |
1124 | return dn_db; | |
1125 | } | |
1126 | ||
1127 | ||
1128 | /* | |
1129 | * This processes a device up event. We only start up | |
1130 | * the loopback device & ethernet devices with correct | |
b595076a | 1131 | * MAC addresses automatically. Others must be started |
1da177e4 LT |
1132 | * specifically. |
1133 | * | |
1134 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1135 | * with using decnet_address here and for autobind, it will be one less thing | |
1136 | * for users to worry about setting up. | |
1137 | */ | |
1138 | ||
1139 | void dn_dev_up(struct net_device *dev) | |
1140 | { | |
1141 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1142 | __le16 addr = decnet_address; |
1da177e4 | 1143 | int maybe_default = 0; |
fc766e4c | 1144 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1145 | |
1146 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1147 | return; | |
1148 | ||
1149 | /* | |
1150 | * Need to ensure that loopback device has a dn_db attached to it | |
1151 | * to allow creation of neighbours against it, even though it might | |
1152 | * not have a local address of its own. Might as well do the same for | |
1153 | * all autoconfigured interfaces. | |
1154 | */ | |
1155 | if (dn_db == NULL) { | |
1156 | int err; | |
1157 | dn_db = dn_dev_create(dev, &err); | |
1158 | if (dn_db == NULL) | |
1159 | return; | |
1160 | } | |
1161 | ||
1162 | if (dev->type == ARPHRD_ETHER) { | |
1163 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1164 | return; | |
c4ea94ab | 1165 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1166 | maybe_default = 1; |
1167 | } | |
1168 | ||
1169 | if (addr == 0) | |
1170 | return; | |
1171 | ||
1172 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1173 | return; | |
1174 | ||
1175 | ifa->ifa_local = ifa->ifa_address = addr; | |
1176 | ifa->ifa_flags = 0; | |
1177 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1178 | strcpy(ifa->ifa_label, dev->name); | |
1179 | ||
1180 | dn_dev_set_ifa(dev, ifa); | |
1181 | ||
1182 | /* | |
1183 | * Automagically set the default device to the first automatically | |
1184 | * configured ethernet card in the system. | |
1185 | */ | |
1186 | if (maybe_default) { | |
1187 | dev_hold(dev); | |
1188 | if (dn_dev_set_default(dev, 0)) | |
1189 | dev_put(dev); | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | static void dn_dev_delete(struct net_device *dev) | |
1194 | { | |
fc766e4c | 1195 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1196 | |
1197 | if (dn_db == NULL) | |
1198 | return; | |
1199 | ||
1200 | del_timer_sync(&dn_db->timer); | |
1201 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1202 | dn_dev_check_default(dev); | |
1203 | neigh_ifdown(&dn_neigh_table, dev); | |
1204 | ||
1205 | if (dn_db->parms.down) | |
1206 | dn_db->parms.down(dev); | |
1207 | ||
1208 | dev->dn_ptr = NULL; | |
1209 | ||
1210 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1211 | neigh_ifdown(&dn_neigh_table, dev); | |
1212 | ||
1213 | if (dn_db->router) | |
1214 | neigh_release(dn_db->router); | |
1215 | if (dn_db->peer) | |
1216 | neigh_release(dn_db->peer); | |
1217 | ||
1218 | kfree(dn_db); | |
1219 | } | |
1220 | ||
1221 | void dn_dev_down(struct net_device *dev) | |
1222 | { | |
fc766e4c | 1223 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1224 | struct dn_ifaddr *ifa; |
1225 | ||
1226 | if (dn_db == NULL) | |
1227 | return; | |
1228 | ||
fc766e4c | 1229 | while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
1da177e4 LT |
1230 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
1231 | dn_dev_free_ifa(ifa); | |
1232 | } | |
1233 | ||
1234 | dn_dev_delete(dev); | |
1235 | } | |
1236 | ||
1237 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1238 | { | |
1da177e4 LT |
1239 | } |
1240 | ||
1241 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1242 | { | |
1da177e4 LT |
1243 | } |
1244 | ||
1245 | void dn_dev_hello(struct sk_buff *skb) | |
1246 | { | |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | void dn_dev_devices_off(void) | |
1250 | { | |
1251 | struct net_device *dev; | |
1252 | ||
1253 | rtnl_lock(); | |
881d966b | 1254 | for_each_netdev(&init_net, dev) |
1da177e4 LT |
1255 | dn_dev_down(dev); |
1256 | rtnl_unlock(); | |
1257 | ||
1258 | } | |
1259 | ||
1260 | void dn_dev_devices_on(void) | |
1261 | { | |
1262 | struct net_device *dev; | |
1263 | ||
1264 | rtnl_lock(); | |
881d966b | 1265 | for_each_netdev(&init_net, dev) { |
1da177e4 LT |
1266 | if (dev->flags & IFF_UP) |
1267 | dn_dev_up(dev); | |
1268 | } | |
1269 | rtnl_unlock(); | |
1270 | } | |
1271 | ||
1272 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1273 | { | |
e041c683 | 1274 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1275 | } |
1276 | ||
1277 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1278 | { | |
e041c683 | 1279 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1280 | } |
1281 | ||
1282 | #ifdef CONFIG_PROC_FS | |
7562f876 | 1283 | static inline int is_dn_dev(struct net_device *dev) |
1da177e4 | 1284 | { |
7562f876 | 1285 | return dev->dn_ptr != NULL; |
1da177e4 LT |
1286 | } |
1287 | ||
7562f876 | 1288 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
fc766e4c | 1289 | __acquires(RCU) |
1da177e4 | 1290 | { |
7562f876 | 1291 | int i; |
1da177e4 LT |
1292 | struct net_device *dev; |
1293 | ||
fa918602 | 1294 | rcu_read_lock(); |
1da177e4 | 1295 | |
7562f876 PE |
1296 | if (*pos == 0) |
1297 | return SEQ_START_TOKEN; | |
1298 | ||
1299 | i = 1; | |
fa918602 | 1300 | for_each_netdev_rcu(&init_net, dev) { |
7562f876 PE |
1301 | if (!is_dn_dev(dev)) |
1302 | continue; | |
1303 | ||
1304 | if (i++ == *pos) | |
1305 | return dev; | |
1da177e4 | 1306 | } |
7562f876 PE |
1307 | |
1308 | return NULL; | |
1da177e4 LT |
1309 | } |
1310 | ||
1311 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1312 | { | |
7562f876 | 1313 | struct net_device *dev; |
1da177e4 | 1314 | |
1da177e4 | 1315 | ++*pos; |
7562f876 | 1316 | |
ea110733 | 1317 | dev = v; |
7562f876 | 1318 | if (v == SEQ_START_TOKEN) |
881d966b | 1319 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 1320 | |
fa918602 | 1321 | for_each_netdev_continue_rcu(&init_net, dev) { |
7562f876 PE |
1322 | if (!is_dn_dev(dev)) |
1323 | continue; | |
1324 | ||
1325 | return dev; | |
1326 | } | |
1327 | ||
1328 | return NULL; | |
1da177e4 LT |
1329 | } |
1330 | ||
1331 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
fc766e4c | 1332 | __releases(RCU) |
1da177e4 | 1333 | { |
fa918602 | 1334 | rcu_read_unlock(); |
1da177e4 LT |
1335 | } |
1336 | ||
1337 | static char *dn_type2asc(char type) | |
1338 | { | |
06f8fe11 JP |
1339 | switch (type) { |
1340 | case DN_DEV_BCAST: | |
1341 | return "B"; | |
1342 | case DN_DEV_UCAST: | |
1343 | return "U"; | |
1344 | case DN_DEV_MPOINT: | |
1345 | return "M"; | |
1da177e4 LT |
1346 | } |
1347 | ||
1348 | return "?"; | |
1349 | } | |
1350 | ||
1351 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1352 | { | |
1353 | if (v == SEQ_START_TOKEN) | |
429eb0fa | 1354 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1355 | else { |
1356 | struct net_device *dev = v; | |
1357 | char peer_buf[DN_ASCBUF_LEN]; | |
1358 | char router_buf[DN_ASCBUF_LEN]; | |
fc766e4c | 1359 | struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4 | 1360 | |
429eb0fa | 1361 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1362 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1363 | dev->name ? dev->name : "???", |
1364 | dn_type2asc(dn_db->parms.mode), | |
1365 | 0, 0, | |
1da177e4 LT |
1366 | dn_db->t3, dn_db->parms.t3, |
1367 | mtu2blksize(dev), | |
1368 | dn_db->parms.priority, | |
1369 | dn_db->parms.state, dn_db->parms.name, | |
c4106aa8 HH |
1370 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1371 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1372 | } |
1373 | return 0; | |
1374 | } | |
1375 | ||
56b3d975 | 1376 | static const struct seq_operations dn_dev_seq_ops = { |
1da177e4 LT |
1377 | .start = dn_dev_seq_start, |
1378 | .next = dn_dev_seq_next, | |
1379 | .stop = dn_dev_seq_stop, | |
1380 | .show = dn_dev_seq_show, | |
1381 | }; | |
1382 | ||
1383 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1384 | { | |
1385 | return seq_open(file, &dn_dev_seq_ops); | |
1386 | } | |
1387 | ||
9a32144e | 1388 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
1389 | .owner = THIS_MODULE, |
1390 | .open = dn_dev_seq_open, | |
1391 | .read = seq_read, | |
1392 | .llseek = seq_lseek, | |
1393 | .release = seq_release, | |
1394 | }; | |
1395 | ||
1396 | #endif /* CONFIG_PROC_FS */ | |
1397 | ||
4e058063 | 1398 | static int addr[2]; |
1da177e4 LT |
1399 | module_param_array(addr, int, NULL, 0444); |
1400 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1401 | ||
1402 | void __init dn_dev_init(void) | |
1403 | { | |
429eb0fa YH |
1404 | if (addr[0] > 63 || addr[0] < 0) { |
1405 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1406 | return; | |
1407 | } | |
1da177e4 | 1408 | |
429eb0fa YH |
1409 | if (addr[1] > 1023 || addr[1] < 0) { |
1410 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1411 | return; | |
1412 | } | |
1da177e4 | 1413 | |
c4106aa8 | 1414 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1415 | |
1416 | dn_dev_devices_on(); | |
1417 | ||
c7ac8679 GR |
1418 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL); |
1419 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL); | |
1420 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL); | |
1da177e4 | 1421 | |
d4beaa66 | 1422 | proc_create("decnet_dev", S_IRUGO, init_net.proc_net, &dn_dev_seq_fops); |
1da177e4 LT |
1423 | |
1424 | #ifdef CONFIG_SYSCTL | |
1425 | { | |
1426 | int i; | |
1427 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1428 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); | |
1429 | } | |
1430 | #endif /* CONFIG_SYSCTL */ | |
1431 | } | |
1432 | ||
1433 | void __exit dn_dev_cleanup(void) | |
1434 | { | |
1da177e4 LT |
1435 | #ifdef CONFIG_SYSCTL |
1436 | { | |
1437 | int i; | |
1438 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1439 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1440 | } | |
1441 | #endif /* CONFIG_SYSCTL */ | |
1442 | ||
ece31ffd | 1443 | remove_proc_entry("decnet_dev", init_net.proc_net); |
1da177e4 LT |
1444 | |
1445 | dn_dev_devices_off(); | |
1446 | } |