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> |
1da177e4 | 44 | #include <asm/uaccess.h> |
457c4cbc | 45 | #include <net/net_namespace.h> |
1da177e4 LT |
46 | #include <net/neighbour.h> |
47 | #include <net/dst.h> | |
48 | #include <net/flow.h> | |
a8731cbf | 49 | #include <net/fib_rules.h> |
a6f01cac | 50 | #include <net/netlink.h> |
1da177e4 LT |
51 | #include <net/dn.h> |
52 | #include <net/dn_dev.h> | |
53 | #include <net/dn_route.h> | |
54 | #include <net/dn_neigh.h> | |
55 | #include <net/dn_fib.h> | |
56 | ||
57 | #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn)) | |
58 | ||
59 | static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; | |
60 | static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; | |
61 | static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; | |
62 | static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; | |
63 | ||
64 | extern struct neigh_table dn_neigh_table; | |
65 | ||
66 | /* | |
67 | * decnet_address is kept in network order. | |
68 | */ | |
c4ea94ab | 69 | __le16 decnet_address = 0; |
1da177e4 | 70 | |
e5c140a3 | 71 | static DEFINE_SPINLOCK(dndev_lock); |
1da177e4 | 72 | static struct net_device *decnet_default_device; |
e041c683 | 73 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
1da177e4 LT |
74 | |
75 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); | |
76 | static void dn_dev_delete(struct net_device *dev); | |
b020b942 | 77 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
1da177e4 LT |
78 | |
79 | static int dn_eth_up(struct net_device *); | |
80 | static void dn_eth_down(struct net_device *); | |
81 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
82 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
83 | ||
84 | static struct dn_dev_parms dn_dev_list[] = { | |
85 | { | |
86 | .type = ARPHRD_ETHER, /* Ethernet */ | |
87 | .mode = DN_DEV_BCAST, | |
88 | .state = DN_DEV_S_RU, | |
89 | .t2 = 1, | |
90 | .t3 = 10, | |
91 | .name = "ethernet", | |
1da177e4 LT |
92 | .up = dn_eth_up, |
93 | .down = dn_eth_down, | |
94 | .timer3 = dn_send_brd_hello, | |
95 | }, | |
96 | { | |
97 | .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ | |
98 | .mode = DN_DEV_BCAST, | |
99 | .state = DN_DEV_S_RU, | |
100 | .t2 = 1, | |
101 | .t3 = 10, | |
102 | .name = "ipgre", | |
1da177e4 LT |
103 | .timer3 = dn_send_brd_hello, |
104 | }, | |
105 | #if 0 | |
106 | { | |
107 | .type = ARPHRD_X25, /* Bog standard X.25 */ | |
108 | .mode = DN_DEV_UCAST, | |
109 | .state = DN_DEV_S_DS, | |
110 | .t2 = 1, | |
111 | .t3 = 120, | |
112 | .name = "x25", | |
1da177e4 LT |
113 | .timer3 = dn_send_ptp_hello, |
114 | }, | |
115 | #endif | |
116 | #if 0 | |
117 | { | |
118 | .type = ARPHRD_PPP, /* DECnet over PPP */ | |
119 | .mode = DN_DEV_BCAST, | |
120 | .state = DN_DEV_S_RU, | |
121 | .t2 = 1, | |
122 | .t3 = 10, | |
123 | .name = "ppp", | |
1da177e4 LT |
124 | .timer3 = dn_send_brd_hello, |
125 | }, | |
126 | #endif | |
127 | { | |
128 | .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ | |
129 | .mode = DN_DEV_UCAST, | |
130 | .state = DN_DEV_S_DS, | |
131 | .t2 = 1, | |
132 | .t3 = 120, | |
133 | .name = "ddcmp", | |
1da177e4 LT |
134 | .timer3 = dn_send_ptp_hello, |
135 | }, | |
136 | { | |
137 | .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ | |
138 | .mode = DN_DEV_BCAST, | |
139 | .state = DN_DEV_S_RU, | |
140 | .t2 = 1, | |
141 | .t3 = 10, | |
142 | .name = "loopback", | |
1da177e4 LT |
143 | .timer3 = dn_send_brd_hello, |
144 | } | |
145 | }; | |
146 | ||
8b14a536 | 147 | #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
1da177e4 | 148 | |
8fa0b315 | 149 | #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
1da177e4 LT |
150 | |
151 | #ifdef CONFIG_SYSCTL | |
152 | ||
153 | static int min_t2[] = { 1 }; | |
154 | static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ | |
155 | static int min_t3[] = { 1 }; | |
156 | static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ | |
157 | ||
158 | static int min_priority[1]; | |
159 | static int max_priority[] = { 127 }; /* From DECnet spec */ | |
160 | ||
8d65af78 | 161 | static int dn_forwarding_proc(ctl_table *, int, |
1da177e4 | 162 | void __user *, size_t *, loff_t *); |
1da177e4 LT |
163 | static struct dn_dev_sysctl_table { |
164 | struct ctl_table_header *sysctl_header; | |
165 | ctl_table dn_dev_vars[5]; | |
1da177e4 LT |
166 | } dn_dev_sysctl = { |
167 | NULL, | |
168 | { | |
169 | { | |
1da177e4 LT |
170 | .procname = "forwarding", |
171 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), | |
172 | .maxlen = sizeof(int), | |
173 | .mode = 0644, | |
174 | .proc_handler = dn_forwarding_proc, | |
1da177e4 LT |
175 | }, |
176 | { | |
1da177e4 LT |
177 | .procname = "priority", |
178 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), | |
179 | .maxlen = sizeof(int), | |
180 | .mode = 0644, | |
181 | .proc_handler = proc_dointvec_minmax, | |
1da177e4 LT |
182 | .extra1 = &min_priority, |
183 | .extra2 = &max_priority | |
184 | }, | |
185 | { | |
1da177e4 LT |
186 | .procname = "t2", |
187 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), | |
188 | .maxlen = sizeof(int), | |
189 | .mode = 0644, | |
190 | .proc_handler = proc_dointvec_minmax, | |
1da177e4 LT |
191 | .extra1 = &min_t2, |
192 | .extra2 = &max_t2 | |
193 | }, | |
194 | { | |
1da177e4 LT |
195 | .procname = "t3", |
196 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), | |
197 | .maxlen = sizeof(int), | |
198 | .mode = 0644, | |
199 | .proc_handler = proc_dointvec_minmax, | |
1da177e4 LT |
200 | .extra1 = &min_t3, |
201 | .extra2 = &max_t3 | |
202 | }, | |
203 | {0} | |
204 | }, | |
1da177e4 LT |
205 | }; |
206 | ||
207 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
208 | { | |
209 | struct dn_dev_sysctl_table *t; | |
210 | int i; | |
211 | ||
9bdcc88f | 212 | char path[sizeof("net/decnet/conf/") + IFNAMSIZ]; |
3151a9ab | 213 | |
c66b721a | 214 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
215 | if (t == NULL) |
216 | return; | |
217 | ||
1da177e4 LT |
218 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
219 | long offset = (long)t->dn_dev_vars[i].data; | |
220 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
1da177e4 LT |
221 | } |
222 | ||
9bdcc88f EB |
223 | snprintf(path, sizeof(path), "net/decnet/conf/%s", |
224 | dev? dev->name : parms->name); | |
1da177e4 | 225 | |
1da177e4 LT |
226 | t->dn_dev_vars[0].extra1 = (void *)dev; |
227 | ||
9bdcc88f | 228 | t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars); |
1da177e4 LT |
229 | if (t->sysctl_header == NULL) |
230 | kfree(t); | |
231 | else | |
232 | parms->sysctl = t; | |
233 | } | |
234 | ||
235 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
236 | { | |
237 | if (parms->sysctl) { | |
238 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
239 | parms->sysctl = NULL; | |
5dd3df10 | 240 | unregister_net_sysctl_table(t->sysctl_header); |
1da177e4 LT |
241 | kfree(t); |
242 | } | |
243 | } | |
244 | ||
429eb0fa | 245 | static int dn_forwarding_proc(ctl_table *table, int write, |
1da177e4 LT |
246 | void __user *buffer, |
247 | size_t *lenp, loff_t *ppos) | |
248 | { | |
249 | #ifdef CONFIG_DECNET_ROUTER | |
250 | struct net_device *dev = table->extra1; | |
251 | struct dn_dev *dn_db; | |
252 | int err; | |
253 | int tmp, old; | |
254 | ||
255 | if (table->extra1 == NULL) | |
256 | return -EINVAL; | |
257 | ||
fc766e4c | 258 | dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
259 | old = dn_db->parms.forwarding; |
260 | ||
8d65af78 | 261 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
262 | |
263 | if ((err >= 0) && write) { | |
264 | if (dn_db->parms.forwarding < 0) | |
265 | dn_db->parms.forwarding = 0; | |
266 | if (dn_db->parms.forwarding > 2) | |
267 | dn_db->parms.forwarding = 2; | |
268 | /* | |
269 | * What an ugly hack this is... its works, just. It | |
270 | * would be nice if sysctl/proc were just that little | |
271 | * bit more flexible so I don't have to write a special | |
272 | * routine, or suffer hacks like this - SJW | |
273 | */ | |
274 | tmp = dn_db->parms.forwarding; | |
275 | dn_db->parms.forwarding = old; | |
276 | if (dn_db->parms.down) | |
277 | dn_db->parms.down(dev); | |
278 | dn_db->parms.forwarding = tmp; | |
279 | if (dn_db->parms.up) | |
280 | dn_db->parms.up(dev); | |
281 | } | |
282 | ||
283 | return err; | |
284 | #else | |
285 | return -EINVAL; | |
286 | #endif | |
287 | } | |
288 | ||
1da177e4 LT |
289 | #else /* CONFIG_SYSCTL */ |
290 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
291 | { | |
292 | } | |
293 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
294 | { | |
295 | } | |
296 | ||
297 | #endif /* CONFIG_SYSCTL */ | |
298 | ||
299 | static inline __u16 mtu2blksize(struct net_device *dev) | |
300 | { | |
301 | u32 blksize = dev->mtu; | |
302 | if (blksize > 0xffff) | |
303 | blksize = 0xffff; | |
304 | ||
305 | if (dev->type == ARPHRD_ETHER || | |
306 | dev->type == ARPHRD_PPP || | |
307 | dev->type == ARPHRD_IPGRE || | |
308 | dev->type == ARPHRD_LOOPBACK) | |
309 | blksize -= 2; | |
310 | ||
311 | return (__u16)blksize; | |
312 | } | |
313 | ||
314 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
315 | { | |
316 | struct dn_ifaddr *ifa; | |
317 | ||
0da974f4 | 318 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
319 | |
320 | return ifa; | |
321 | } | |
322 | ||
fc766e4c | 323 | static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
1da177e4 | 324 | { |
1e547757 | 325 | kfree_rcu(ifa, rcu); |
fc766e4c ED |
326 | } |
327 | ||
328 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) | |
329 | { | |
330 | struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); | |
1da177e4 LT |
331 | unsigned char mac_addr[6]; |
332 | struct net_device *dev = dn_db->dev; | |
333 | ||
334 | ASSERT_RTNL(); | |
335 | ||
336 | *ifap = ifa1->ifa_next; | |
337 | ||
338 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 339 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 340 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
22bedad3 | 341 | dev_mc_del(dev, mac_addr); |
1da177e4 LT |
342 | } |
343 | } | |
344 | ||
b020b942 | 345 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
e041c683 | 346 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
347 | if (destroy) { |
348 | dn_dev_free_ifa(ifa1); | |
349 | ||
350 | if (dn_db->ifa_list == NULL) | |
351 | dn_dev_delete(dn_db->dev); | |
352 | } | |
353 | } | |
354 | ||
355 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
356 | { | |
357 | struct net_device *dev = dn_db->dev; | |
358 | struct dn_ifaddr *ifa1; | |
359 | unsigned char mac_addr[6]; | |
360 | ||
361 | ASSERT_RTNL(); | |
362 | ||
429eb0fa | 363 | /* Check for duplicates */ |
fc766e4c ED |
364 | for (ifa1 = rtnl_dereference(dn_db->ifa_list); |
365 | ifa1 != NULL; | |
366 | ifa1 = rtnl_dereference(ifa1->ifa_next)) { | |
1da177e4 LT |
367 | if (ifa1->ifa_local == ifa->ifa_local) |
368 | return -EEXIST; | |
369 | } | |
370 | ||
371 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 372 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 373 | dn_dn2eth(mac_addr, ifa->ifa_local); |
22bedad3 | 374 | dev_mc_add(dev, mac_addr); |
1da177e4 LT |
375 | } |
376 | } | |
377 | ||
378 | ifa->ifa_next = dn_db->ifa_list; | |
cf778b00 | 379 | rcu_assign_pointer(dn_db->ifa_list, ifa); |
1da177e4 | 380 | |
b020b942 | 381 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 382 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
383 | |
384 | return 0; | |
385 | } | |
386 | ||
387 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
388 | { | |
fc766e4c | 389 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
390 | int rv; |
391 | ||
392 | if (dn_db == NULL) { | |
393 | int err; | |
394 | dn_db = dn_dev_create(dev, &err); | |
395 | if (dn_db == NULL) | |
396 | return err; | |
397 | } | |
398 | ||
399 | ifa->ifa_dev = dn_db; | |
400 | ||
401 | if (dev->flags & IFF_LOOPBACK) | |
402 | ifa->ifa_scope = RT_SCOPE_HOST; | |
403 | ||
404 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
405 | if (rv) | |
406 | dn_dev_free_ifa(ifa); | |
407 | return rv; | |
408 | } | |
409 | ||
410 | ||
411 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
412 | { | |
413 | char buffer[DN_IFREQ_SIZE]; | |
414 | struct ifreq *ifr = (struct ifreq *)buffer; | |
415 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
416 | struct dn_dev *dn_db; | |
417 | struct net_device *dev; | |
fc766e4c ED |
418 | struct dn_ifaddr *ifa = NULL; |
419 | struct dn_ifaddr __rcu **ifap = NULL; | |
1da177e4 LT |
420 | int ret = 0; |
421 | ||
422 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
423 | return -EFAULT; | |
424 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
425 | ||
881d966b | 426 | dev_load(&init_net, ifr->ifr_name); |
1da177e4 | 427 | |
06f8fe11 JP |
428 | switch (cmd) { |
429 | case SIOCGIFADDR: | |
430 | break; | |
431 | case SIOCSIFADDR: | |
432 | if (!capable(CAP_NET_ADMIN)) | |
433 | return -EACCES; | |
434 | if (sdn->sdn_family != AF_DECnet) | |
1da177e4 | 435 | return -EINVAL; |
06f8fe11 JP |
436 | break; |
437 | default: | |
438 | return -EINVAL; | |
1da177e4 LT |
439 | } |
440 | ||
441 | rtnl_lock(); | |
442 | ||
881d966b | 443 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
1da177e4 LT |
444 | ret = -ENODEV; |
445 | goto done; | |
446 | } | |
447 | ||
fc766e4c ED |
448 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { |
449 | for (ifap = &dn_db->ifa_list; | |
450 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
451 | ifap = &ifa->ifa_next) | |
1da177e4 LT |
452 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
453 | break; | |
454 | } | |
455 | ||
456 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
457 | ret = -EADDRNOTAVAIL; | |
458 | goto done; | |
459 | } | |
460 | ||
06f8fe11 JP |
461 | switch (cmd) { |
462 | case SIOCGIFADDR: | |
463 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; | |
464 | goto rarok; | |
465 | ||
466 | case SIOCSIFADDR: | |
467 | if (!ifa) { | |
468 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
469 | ret = -ENOBUFS; | |
470 | break; | |
1da177e4 | 471 | } |
06f8fe11 JP |
472 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
473 | } else { | |
474 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
475 | break; | |
476 | dn_dev_del_ifa(dn_db, ifap, 0); | |
477 | } | |
1da177e4 | 478 | |
06f8fe11 | 479 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
1da177e4 | 480 | |
06f8fe11 | 481 | ret = dn_dev_set_ifa(dev, ifa); |
1da177e4 LT |
482 | } |
483 | done: | |
484 | rtnl_unlock(); | |
485 | ||
486 | return ret; | |
487 | rarok: | |
488 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
489 | ret = -EFAULT; | |
490 | goto done; | |
491 | } | |
492 | ||
493 | struct net_device *dn_dev_get_default(void) | |
494 | { | |
495 | struct net_device *dev; | |
e5c140a3 | 496 | |
497 | spin_lock(&dndev_lock); | |
1da177e4 LT |
498 | dev = decnet_default_device; |
499 | if (dev) { | |
500 | if (dev->dn_ptr) | |
501 | dev_hold(dev); | |
502 | else | |
503 | dev = NULL; | |
504 | } | |
e5c140a3 | 505 | spin_unlock(&dndev_lock); |
506 | ||
1da177e4 LT |
507 | return dev; |
508 | } | |
509 | ||
510 | int dn_dev_set_default(struct net_device *dev, int force) | |
511 | { | |
512 | struct net_device *old = NULL; | |
513 | int rv = -EBUSY; | |
514 | if (!dev->dn_ptr) | |
515 | return -ENODEV; | |
e5c140a3 | 516 | |
517 | spin_lock(&dndev_lock); | |
1da177e4 LT |
518 | if (force || decnet_default_device == NULL) { |
519 | old = decnet_default_device; | |
520 | decnet_default_device = dev; | |
521 | rv = 0; | |
522 | } | |
e5c140a3 | 523 | spin_unlock(&dndev_lock); |
524 | ||
1da177e4 | 525 | if (old) |
6a57b2ee | 526 | dev_put(old); |
1da177e4 LT |
527 | return rv; |
528 | } | |
529 | ||
530 | static void dn_dev_check_default(struct net_device *dev) | |
531 | { | |
e5c140a3 | 532 | spin_lock(&dndev_lock); |
1da177e4 LT |
533 | if (dev == decnet_default_device) { |
534 | decnet_default_device = NULL; | |
535 | } else { | |
536 | dev = NULL; | |
537 | } | |
e5c140a3 | 538 | spin_unlock(&dndev_lock); |
539 | ||
1da177e4 LT |
540 | if (dev) |
541 | dev_put(dev); | |
542 | } | |
543 | ||
b4d745db ED |
544 | /* |
545 | * Called with RTNL | |
546 | */ | |
1da177e4 LT |
547 | static struct dn_dev *dn_dev_by_index(int ifindex) |
548 | { | |
549 | struct net_device *dev; | |
550 | struct dn_dev *dn_dev = NULL; | |
b4d745db ED |
551 | |
552 | dev = __dev_get_by_index(&init_net, ifindex); | |
553 | if (dev) | |
fc766e4c | 554 | dn_dev = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
555 | |
556 | return dn_dev; | |
557 | } | |
558 | ||
ef7c79ed | 559 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
4a89c256 TG |
560 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
561 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
562 | [IFA_LABEL] = { .type = NLA_STRING, | |
563 | .len = IFNAMSIZ - 1 }, | |
564 | }; | |
565 | ||
566 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 567 | { |
3b1e0a65 | 568 | struct net *net = sock_net(skb->sk); |
4a89c256 | 569 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 570 | struct dn_dev *dn_db; |
4a89c256 | 571 | struct ifaddrmsg *ifm; |
fc766e4c ED |
572 | struct dn_ifaddr *ifa; |
573 | struct dn_ifaddr __rcu **ifap; | |
b854272b DL |
574 | int err = -EINVAL; |
575 | ||
09ad9bc7 | 576 | if (!net_eq(net, &init_net)) |
b854272b | 577 | goto errout; |
4a89c256 TG |
578 | |
579 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
580 | if (err < 0) | |
581 | goto errout; | |
1da177e4 | 582 | |
3ccd8624 | 583 | err = -ENODEV; |
4a89c256 | 584 | ifm = nlmsg_data(nlh); |
1da177e4 | 585 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
586 | goto errout; |
587 | ||
3ccd8624 | 588 | err = -EADDRNOTAVAIL; |
fc766e4c ED |
589 | for (ifap = &dn_db->ifa_list; |
590 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
591 | ifap = &ifa->ifa_next) { | |
4a89c256 TG |
592 | if (tb[IFA_LOCAL] && |
593 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
594 | continue; | |
1da177e4 | 595 | |
4a89c256 | 596 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
597 | continue; |
598 | ||
599 | dn_dev_del_ifa(dn_db, ifap, 1); | |
600 | return 0; | |
601 | } | |
602 | ||
4a89c256 TG |
603 | errout: |
604 | return err; | |
1da177e4 LT |
605 | } |
606 | ||
4a89c256 | 607 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1da177e4 | 608 | { |
3b1e0a65 | 609 | struct net *net = sock_net(skb->sk); |
4a89c256 | 610 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
611 | struct net_device *dev; |
612 | struct dn_dev *dn_db; | |
4a89c256 | 613 | struct ifaddrmsg *ifm; |
1da177e4 | 614 | struct dn_ifaddr *ifa; |
4a89c256 TG |
615 | int err; |
616 | ||
09ad9bc7 | 617 | if (!net_eq(net, &init_net)) |
b854272b DL |
618 | return -EINVAL; |
619 | ||
4a89c256 TG |
620 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
621 | if (err < 0) | |
622 | return err; | |
1da177e4 | 623 | |
4a89c256 | 624 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
625 | return -EINVAL; |
626 | ||
4a89c256 | 627 | ifm = nlmsg_data(nlh); |
881d966b | 628 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4 LT |
629 | return -ENODEV; |
630 | ||
fc766e4c | 631 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
1da177e4 LT |
632 | dn_db = dn_dev_create(dev, &err); |
633 | if (!dn_db) | |
634 | return err; | |
635 | } | |
429eb0fa | 636 | |
1da177e4 LT |
637 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
638 | return -ENOBUFS; | |
639 | ||
4a89c256 TG |
640 | if (tb[IFA_ADDRESS] == NULL) |
641 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
642 | ||
643 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
644 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
1da177e4 LT |
645 | ifa->ifa_flags = ifm->ifa_flags; |
646 | ifa->ifa_scope = ifm->ifa_scope; | |
647 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
648 | |
649 | if (tb[IFA_LABEL]) | |
650 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
651 | else |
652 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
653 | ||
4a89c256 TG |
654 | err = dn_dev_insert_ifa(dn_db, ifa); |
655 | if (err) | |
1da177e4 | 656 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
657 | |
658 | return err; | |
1da177e4 LT |
659 | } |
660 | ||
a6f01cac TG |
661 | static inline size_t dn_ifaddr_nlmsg_size(void) |
662 | { | |
663 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
664 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
665 | + nla_total_size(2) /* IFA_ADDRESS */ | |
666 | + nla_total_size(2); /* IFA_LOCAL */ | |
667 | } | |
668 | ||
4a89c256 | 669 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
15e47304 | 670 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
671 | { |
672 | struct ifaddrmsg *ifm; | |
673 | struct nlmsghdr *nlh; | |
1da177e4 | 674 | |
15e47304 | 675 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
4a89c256 | 676 | if (nlh == NULL) |
26932566 | 677 | return -EMSGSIZE; |
1da177e4 | 678 | |
4a89c256 | 679 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
680 | ifm->ifa_family = AF_DECnet; |
681 | ifm->ifa_prefixlen = 16; | |
682 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
683 | ifm->ifa_scope = ifa->ifa_scope; | |
684 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 685 | |
b21dddb9 DM |
686 | if ((ifa->ifa_address && |
687 | nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) || | |
688 | (ifa->ifa_local && | |
689 | nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) || | |
690 | (ifa->ifa_label[0] && | |
691 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label))) | |
692 | goto nla_put_failure; | |
4a89c256 TG |
693 | return nlmsg_end(skb, nlh); |
694 | ||
695 | nla_put_failure: | |
26932566 PM |
696 | nlmsg_cancel(skb, nlh); |
697 | return -EMSGSIZE; | |
1da177e4 LT |
698 | } |
699 | ||
b020b942 | 700 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
701 | { |
702 | struct sk_buff *skb; | |
dc738dd8 | 703 | int err = -ENOBUFS; |
1da177e4 | 704 | |
a6f01cac | 705 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
706 | if (skb == NULL) |
707 | goto errout; | |
708 | ||
4a89c256 | 709 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
710 | if (err < 0) { |
711 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
712 | WARN_ON(err == -EMSGSIZE); | |
713 | kfree_skb(skb); | |
714 | goto errout; | |
715 | } | |
1ce85fe4 PNA |
716 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
717 | return; | |
dc738dd8 TG |
718 | errout: |
719 | if (err < 0) | |
97c53cac | 720 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4 LT |
721 | } |
722 | ||
4a89c256 | 723 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 724 | { |
3b1e0a65 | 725 | struct net *net = sock_net(skb->sk); |
4a89c256 | 726 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
727 | struct net_device *dev; |
728 | struct dn_dev *dn_db; | |
729 | struct dn_ifaddr *ifa; | |
730 | ||
09ad9bc7 | 731 | if (!net_eq(net, &init_net)) |
b854272b DL |
732 | return 0; |
733 | ||
4a89c256 TG |
734 | skip_ndevs = cb->args[0]; |
735 | skip_naddr = cb->args[1]; | |
736 | ||
7562f876 | 737 | idx = 0; |
e67f88dd ED |
738 | rcu_read_lock(); |
739 | for_each_netdev_rcu(&init_net, dev) { | |
4a89c256 | 740 | if (idx < skip_ndevs) |
7562f876 | 741 | goto cont; |
4a89c256 TG |
742 | else if (idx > skip_ndevs) { |
743 | /* Only skip over addresses for first dev dumped | |
744 | * in this iteration (idx == skip_ndevs) */ | |
745 | skip_naddr = 0; | |
746 | } | |
747 | ||
e67f88dd | 748 | if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
7562f876 | 749 | goto cont; |
1da177e4 | 750 | |
e67f88dd ED |
751 | for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; |
752 | ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { | |
4a89c256 | 753 | if (dn_idx < skip_naddr) |
a2221f30 | 754 | continue; |
1da177e4 | 755 | |
15e47304 | 756 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid, |
4a89c256 TG |
757 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
758 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
759 | goto done; |
760 | } | |
7562f876 PE |
761 | cont: |
762 | idx++; | |
1da177e4 LT |
763 | } |
764 | done: | |
e67f88dd | 765 | rcu_read_unlock(); |
1da177e4 LT |
766 | cb->args[0] = idx; |
767 | cb->args[1] = dn_idx; | |
768 | ||
769 | return skb->len; | |
770 | } | |
771 | ||
c4ea94ab | 772 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 | 773 | { |
fc766e4c | 774 | struct dn_dev *dn_db; |
1da177e4 LT |
775 | struct dn_ifaddr *ifa; |
776 | int rv = -ENODEV; | |
41bdecf1 | 777 | |
fc766e4c ED |
778 | rcu_read_lock(); |
779 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
780 | if (dn_db == NULL) |
781 | goto out; | |
41bdecf1 | 782 | |
fc766e4c | 783 | ifa = rcu_dereference(dn_db->ifa_list); |
1da177e4 LT |
784 | if (ifa != NULL) { |
785 | *addr = ifa->ifa_local; | |
786 | rv = 0; | |
787 | } | |
788 | out: | |
fc766e4c | 789 | rcu_read_unlock(); |
1da177e4 LT |
790 | return rv; |
791 | } | |
792 | ||
429eb0fa | 793 | /* |
1da177e4 LT |
794 | * Find a default address to bind to. |
795 | * | |
796 | * This is one of those areas where the initial VMS concepts don't really | |
797 | * map onto the Linux concepts, and since we introduced multiple addresses | |
798 | * per interface we have to cope with slightly odd ways of finding out what | |
799 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
800 | * a sensible default. Eventually the routing code will take care of all the | |
801 | * nasties for us I hope. | |
802 | */ | |
c4ea94ab | 803 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
804 | { |
805 | struct net_device *dev; | |
806 | int rv; | |
807 | dev = dn_dev_get_default(); | |
808 | last_chance: | |
809 | if (dev) { | |
1da177e4 | 810 | rv = dn_dev_get_first(dev, addr); |
1da177e4 | 811 | dev_put(dev); |
2774c7ab | 812 | if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4 LT |
813 | return rv; |
814 | } | |
2774c7ab | 815 | dev = init_net.loopback_dev; |
1da177e4 LT |
816 | dev_hold(dev); |
817 | goto last_chance; | |
818 | } | |
819 | ||
820 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
821 | { | |
429eb0fa YH |
822 | struct endnode_hello_message *msg; |
823 | struct sk_buff *skb = NULL; | |
824 | __le16 *pktlen; | |
fc766e4c | 825 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 | 826 | |
429eb0fa | 827 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
828 | return; |
829 | ||
429eb0fa | 830 | skb->dev = dev; |
1da177e4 | 831 | |
429eb0fa | 832 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 833 | |
429eb0fa YH |
834 | msg->msgflg = 0x0D; |
835 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 836 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa | 837 | msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa8 | 838 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fa YH |
839 | msg->area = 0x00; |
840 | memset(msg->seed, 0, 8); | |
841 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
842 | |
843 | if (dn_db->router) { | |
844 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
845 | dn_dn2eth(msg->neighbor, dn->addr); | |
846 | } | |
847 | ||
c4106aa8 | 848 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fa YH |
849 | msg->mpd = 0x00; |
850 | msg->datalen = 0x02; | |
851 | memset(msg->data, 0xAA, 2); | |
852 | ||
853 | pktlen = (__le16 *)skb_push(skb,2); | |
c4106aa8 | 854 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 855 | |
c1d2bbe1 | 856 | skb_reset_network_header(skb); |
1da177e4 LT |
857 | |
858 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
859 | } | |
860 | ||
861 | ||
862 | #define DRDELAY (5 * HZ) | |
863 | ||
864 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
865 | { | |
866 | /* First check time since device went up */ | |
867 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
868 | return 0; | |
869 | ||
870 | /* If there is no router, then yes... */ | |
871 | if (!dn_db->router) | |
872 | return 1; | |
873 | ||
874 | /* otherwise only if we have a higher priority or.. */ | |
875 | if (dn->priority < dn_db->parms.priority) | |
876 | return 1; | |
877 | ||
878 | /* if we have equal priority and a higher node number */ | |
879 | if (dn->priority != dn_db->parms.priority) | |
880 | return 0; | |
881 | ||
c4106aa8 | 882 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4 LT |
883 | return 1; |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
888 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
889 | { | |
890 | int n; | |
fc766e4c | 891 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
892 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
893 | struct sk_buff *skb; | |
894 | size_t size; | |
895 | unsigned char *ptr; | |
896 | unsigned char *i1, *i2; | |
c4ea94ab | 897 | __le16 *pktlen; |
1da177e4 LT |
898 | char *src; |
899 | ||
900 | if (mtu2blksize(dev) < (26 + 7)) | |
901 | return; | |
902 | ||
903 | n = mtu2blksize(dev) - 26; | |
904 | n /= 7; | |
905 | ||
906 | if (n > 32) | |
907 | n = 32; | |
908 | ||
909 | size = 2 + 26 + 7 * n; | |
910 | ||
911 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
912 | return; | |
913 | ||
914 | skb->dev = dev; | |
915 | ptr = skb_put(skb, size); | |
916 | ||
917 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
918 | *ptr++ = 2; /* ECO */ | |
919 | *ptr++ = 0; | |
920 | *ptr++ = 0; | |
921 | dn_dn2eth(ptr, ifa->ifa_local); | |
922 | src = ptr; | |
923 | ptr += ETH_ALEN; | |
429eb0fa | 924 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 925 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa8 | 926 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4 | 927 | ptr += 2; |
429eb0fa | 928 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 929 | *ptr++ = 0; /* Area: Reserved */ |
c4106aa8 | 930 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
931 | ptr += 2; |
932 | *ptr++ = 0; /* MPD: Reserved */ | |
933 | i1 = ptr++; | |
934 | memset(ptr, 0, 7); /* Name: Reserved */ | |
935 | ptr += 7; | |
936 | i2 = ptr++; | |
937 | ||
938 | n = dn_neigh_elist(dev, ptr, n); | |
939 | ||
940 | *i2 = 7 * n; | |
941 | *i1 = 8 + *i2; | |
942 | ||
943 | skb_trim(skb, (27 + *i2)); | |
944 | ||
c4ea94ab | 945 | pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa8 | 946 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 947 | |
c1d2bbe1 | 948 | skb_reset_network_header(skb); |
1da177e4 LT |
949 | |
950 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
951 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
952 | if (skb2) { | |
953 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
954 | } | |
955 | } | |
956 | ||
957 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
958 | } | |
959 | ||
960 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
961 | { | |
fc766e4c | 962 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
963 | |
964 | if (dn_db->parms.forwarding == 0) | |
965 | dn_send_endnode_hello(dev, ifa); | |
966 | else | |
967 | dn_send_router_hello(dev, ifa); | |
968 | } | |
969 | ||
970 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
971 | { | |
972 | int tdlen = 16; | |
973 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
974 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
975 | int i; | |
976 | unsigned char *ptr; | |
977 | char src[ETH_ALEN]; | |
978 | ||
979 | if (skb == NULL) | |
980 | return ; | |
981 | ||
982 | skb->dev = dev; | |
983 | skb_push(skb, dev->hard_header_len); | |
984 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
985 | ||
986 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 987 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
988 | ptr += 2; |
989 | *ptr++ = tdlen; | |
990 | ||
991 | for(i = 0; i < tdlen; i++) | |
992 | *ptr++ = 0252; | |
993 | ||
994 | dn_dn2eth(src, ifa->ifa_local); | |
995 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
996 | } | |
997 | ||
998 | static int dn_eth_up(struct net_device *dev) | |
999 | { | |
fc766e4c | 1000 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1001 | |
1002 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1003 | dev_mc_add(dev, dn_rt_all_end_mcast); |
1da177e4 | 1004 | else |
22bedad3 | 1005 | dev_mc_add(dev, dn_rt_all_rt_mcast); |
1da177e4 | 1006 | |
1da177e4 LT |
1007 | dn_db->use_long = 1; |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | static void dn_eth_down(struct net_device *dev) | |
1013 | { | |
fc766e4c | 1014 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1015 | |
1016 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1017 | dev_mc_del(dev, dn_rt_all_end_mcast); |
1da177e4 | 1018 | else |
22bedad3 | 1019 | dev_mc_del(dev, dn_rt_all_rt_mcast); |
1da177e4 LT |
1020 | } |
1021 | ||
1022 | static void dn_dev_set_timer(struct net_device *dev); | |
1023 | ||
1024 | static void dn_dev_timer_func(unsigned long arg) | |
1025 | { | |
1026 | struct net_device *dev = (struct net_device *)arg; | |
fc766e4c | 1027 | struct dn_dev *dn_db; |
1da177e4 LT |
1028 | struct dn_ifaddr *ifa; |
1029 | ||
fc766e4c ED |
1030 | rcu_read_lock(); |
1031 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
1032 | if (dn_db->t3 <= dn_db->parms.t2) { |
1033 | if (dn_db->parms.timer3) { | |
fc766e4c ED |
1034 | for (ifa = rcu_dereference(dn_db->ifa_list); |
1035 | ifa; | |
1036 | ifa = rcu_dereference(ifa->ifa_next)) { | |
1da177e4 LT |
1037 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
1038 | dn_db->parms.timer3(dev, ifa); | |
1039 | } | |
1040 | } | |
1041 | dn_db->t3 = dn_db->parms.t3; | |
1042 | } else { | |
1043 | dn_db->t3 -= dn_db->parms.t2; | |
1044 | } | |
fc766e4c | 1045 | rcu_read_unlock(); |
1da177e4 LT |
1046 | dn_dev_set_timer(dev); |
1047 | } | |
1048 | ||
1049 | static void dn_dev_set_timer(struct net_device *dev) | |
1050 | { | |
fc766e4c | 1051 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1052 | |
1053 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1054 | dn_db->parms.t2 = dn_db->parms.t3; | |
1055 | ||
1056 | dn_db->timer.data = (unsigned long)dev; | |
1057 | dn_db->timer.function = dn_dev_timer_func; | |
1058 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1059 | ||
1060 | add_timer(&dn_db->timer); | |
1061 | } | |
1062 | ||
5eaa65b2 | 1063 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4 LT |
1064 | { |
1065 | int i; | |
1066 | struct dn_dev_parms *p = dn_dev_list; | |
1067 | struct dn_dev *dn_db; | |
1068 | ||
1069 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1070 | if (p->type == dev->type) | |
1071 | break; | |
1072 | } | |
1073 | ||
1074 | *err = -ENODEV; | |
1075 | if (i == DN_DEV_LIST_SIZE) | |
1076 | return NULL; | |
1077 | ||
1078 | *err = -ENOBUFS; | |
0da974f4 | 1079 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1080 | return NULL; |
1081 | ||
1da177e4 | 1082 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
fc766e4c | 1083 | |
cf778b00 | 1084 | rcu_assign_pointer(dev->dn_ptr, dn_db); |
1da177e4 LT |
1085 | dn_db->dev = dev; |
1086 | init_timer(&dn_db->timer); | |
1087 | ||
1088 | dn_db->uptime = jiffies; | |
95743deb EB |
1089 | |
1090 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1091 | if (!dn_db->neigh_parms) { | |
a9b3cd7f | 1092 | RCU_INIT_POINTER(dev->dn_ptr, NULL); |
95743deb EB |
1093 | kfree(dn_db); |
1094 | return NULL; | |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | if (dn_db->parms.up) { |
1098 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1099 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1100 | dev->dn_ptr = NULL; |
1101 | kfree(dn_db); | |
1102 | return NULL; | |
1103 | } | |
1104 | } | |
1105 | ||
1da177e4 LT |
1106 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1107 | ||
1108 | dn_dev_set_timer(dev); | |
1109 | ||
1110 | *err = 0; | |
1111 | return dn_db; | |
1112 | } | |
1113 | ||
1114 | ||
1115 | /* | |
1116 | * This processes a device up event. We only start up | |
1117 | * the loopback device & ethernet devices with correct | |
b595076a | 1118 | * MAC addresses automatically. Others must be started |
1da177e4 LT |
1119 | * specifically. |
1120 | * | |
1121 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1122 | * with using decnet_address here and for autobind, it will be one less thing | |
1123 | * for users to worry about setting up. | |
1124 | */ | |
1125 | ||
1126 | void dn_dev_up(struct net_device *dev) | |
1127 | { | |
1128 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1129 | __le16 addr = decnet_address; |
1da177e4 | 1130 | int maybe_default = 0; |
fc766e4c | 1131 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1132 | |
1133 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1134 | return; | |
1135 | ||
1136 | /* | |
1137 | * Need to ensure that loopback device has a dn_db attached to it | |
1138 | * to allow creation of neighbours against it, even though it might | |
1139 | * not have a local address of its own. Might as well do the same for | |
1140 | * all autoconfigured interfaces. | |
1141 | */ | |
1142 | if (dn_db == NULL) { | |
1143 | int err; | |
1144 | dn_db = dn_dev_create(dev, &err); | |
1145 | if (dn_db == NULL) | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | if (dev->type == ARPHRD_ETHER) { | |
1150 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1151 | return; | |
c4ea94ab | 1152 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1153 | maybe_default = 1; |
1154 | } | |
1155 | ||
1156 | if (addr == 0) | |
1157 | return; | |
1158 | ||
1159 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1160 | return; | |
1161 | ||
1162 | ifa->ifa_local = ifa->ifa_address = addr; | |
1163 | ifa->ifa_flags = 0; | |
1164 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1165 | strcpy(ifa->ifa_label, dev->name); | |
1166 | ||
1167 | dn_dev_set_ifa(dev, ifa); | |
1168 | ||
1169 | /* | |
1170 | * Automagically set the default device to the first automatically | |
1171 | * configured ethernet card in the system. | |
1172 | */ | |
1173 | if (maybe_default) { | |
1174 | dev_hold(dev); | |
1175 | if (dn_dev_set_default(dev, 0)) | |
1176 | dev_put(dev); | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | static void dn_dev_delete(struct net_device *dev) | |
1181 | { | |
fc766e4c | 1182 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1183 | |
1184 | if (dn_db == NULL) | |
1185 | return; | |
1186 | ||
1187 | del_timer_sync(&dn_db->timer); | |
1188 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1189 | dn_dev_check_default(dev); | |
1190 | neigh_ifdown(&dn_neigh_table, dev); | |
1191 | ||
1192 | if (dn_db->parms.down) | |
1193 | dn_db->parms.down(dev); | |
1194 | ||
1195 | dev->dn_ptr = NULL; | |
1196 | ||
1197 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1198 | neigh_ifdown(&dn_neigh_table, dev); | |
1199 | ||
1200 | if (dn_db->router) | |
1201 | neigh_release(dn_db->router); | |
1202 | if (dn_db->peer) | |
1203 | neigh_release(dn_db->peer); | |
1204 | ||
1205 | kfree(dn_db); | |
1206 | } | |
1207 | ||
1208 | void dn_dev_down(struct net_device *dev) | |
1209 | { | |
fc766e4c | 1210 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1211 | struct dn_ifaddr *ifa; |
1212 | ||
1213 | if (dn_db == NULL) | |
1214 | return; | |
1215 | ||
fc766e4c | 1216 | while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
1da177e4 LT |
1217 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
1218 | dn_dev_free_ifa(ifa); | |
1219 | } | |
1220 | ||
1221 | dn_dev_delete(dev); | |
1222 | } | |
1223 | ||
1224 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1225 | { | |
1da177e4 LT |
1226 | } |
1227 | ||
1228 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1229 | { | |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | void dn_dev_hello(struct sk_buff *skb) | |
1233 | { | |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | void dn_dev_devices_off(void) | |
1237 | { | |
1238 | struct net_device *dev; | |
1239 | ||
1240 | rtnl_lock(); | |
881d966b | 1241 | for_each_netdev(&init_net, dev) |
1da177e4 LT |
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(); | |
881d966b | 1252 | for_each_netdev(&init_net, dev) { |
1da177e4 LT |
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 | { | |
e041c683 | 1261 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1265 | { | |
e041c683 | 1266 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | #ifdef CONFIG_PROC_FS | |
7562f876 | 1270 | static inline int is_dn_dev(struct net_device *dev) |
1da177e4 | 1271 | { |
7562f876 | 1272 | return dev->dn_ptr != NULL; |
1da177e4 LT |
1273 | } |
1274 | ||
7562f876 | 1275 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
fc766e4c | 1276 | __acquires(RCU) |
1da177e4 | 1277 | { |
7562f876 | 1278 | int i; |
1da177e4 LT |
1279 | struct net_device *dev; |
1280 | ||
fa918602 | 1281 | rcu_read_lock(); |
1da177e4 | 1282 | |
7562f876 PE |
1283 | if (*pos == 0) |
1284 | return SEQ_START_TOKEN; | |
1285 | ||
1286 | i = 1; | |
fa918602 | 1287 | for_each_netdev_rcu(&init_net, dev) { |
7562f876 PE |
1288 | if (!is_dn_dev(dev)) |
1289 | continue; | |
1290 | ||
1291 | if (i++ == *pos) | |
1292 | return dev; | |
1da177e4 | 1293 | } |
7562f876 PE |
1294 | |
1295 | return NULL; | |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1299 | { | |
7562f876 | 1300 | struct net_device *dev; |
1da177e4 | 1301 | |
1da177e4 | 1302 | ++*pos; |
7562f876 | 1303 | |
ea110733 | 1304 | dev = v; |
7562f876 | 1305 | if (v == SEQ_START_TOKEN) |
881d966b | 1306 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 1307 | |
fa918602 | 1308 | for_each_netdev_continue_rcu(&init_net, dev) { |
7562f876 PE |
1309 | if (!is_dn_dev(dev)) |
1310 | continue; | |
1311 | ||
1312 | return dev; | |
1313 | } | |
1314 | ||
1315 | return NULL; | |
1da177e4 LT |
1316 | } |
1317 | ||
1318 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
fc766e4c | 1319 | __releases(RCU) |
1da177e4 | 1320 | { |
fa918602 | 1321 | rcu_read_unlock(); |
1da177e4 LT |
1322 | } |
1323 | ||
1324 | static char *dn_type2asc(char type) | |
1325 | { | |
06f8fe11 JP |
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"; | |
1da177e4 LT |
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) | |
429eb0fa | 1341 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1342 | else { |
1343 | struct net_device *dev = v; | |
1344 | char peer_buf[DN_ASCBUF_LEN]; | |
1345 | char router_buf[DN_ASCBUF_LEN]; | |
fc766e4c | 1346 | struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4 | 1347 | |
429eb0fa | 1348 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1349 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1350 | dev->name ? dev->name : "???", |
1351 | dn_type2asc(dn_db->parms.mode), | |
1352 | 0, 0, | |
1da177e4 LT |
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, | |
c4106aa8 HH |
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) : ""); | |
1da177e4 LT |
1359 | } |
1360 | return 0; | |
1361 | } | |
1362 | ||
56b3d975 | 1363 | static const struct seq_operations dn_dev_seq_ops = { |
1da177e4 LT |
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 | ||
9a32144e | 1375 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
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 | ||
4e058063 | 1385 | static int addr[2]; |
1da177e4 LT |
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 | { | |
429eb0fa YH |
1391 | if (addr[0] > 63 || addr[0] < 0) { |
1392 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1393 | return; | |
1394 | } | |
1da177e4 | 1395 | |
429eb0fa YH |
1396 | if (addr[1] > 1023 || addr[1] < 0) { |
1397 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1398 | return; | |
1399 | } | |
1da177e4 | 1400 | |
c4106aa8 | 1401 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1402 | |
1403 | dn_dev_devices_on(); | |
1404 | ||
c7ac8679 GR |
1405 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL); |
1406 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL); | |
1407 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL); | |
1da177e4 | 1408 | |
457c4cbc | 1409 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
1da177e4 LT |
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 | { | |
1da177e4 LT |
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 | ||
457c4cbc | 1430 | proc_net_remove(&init_net, "decnet_dev"); |
1da177e4 LT |
1431 | |
1432 | dn_dev_devices_off(); | |
1433 | } |