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 LT |
44 | #include <asm/uaccess.h> |
45 | #include <asm/system.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 | ||
8d65af78 | 162 | static int dn_forwarding_proc(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; | |
166 | 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 | ||
3151a9ab PE |
213 | #define DN_CTL_PATH_DEV 3 |
214 | ||
215 | struct ctl_path dn_ctl_path[] = { | |
f8572d8f EB |
216 | { .procname = "net", }, |
217 | { .procname = "decnet", }, | |
218 | { .procname = "conf", }, | |
3151a9ab PE |
219 | { /* to be set */ }, |
220 | { }, | |
221 | }; | |
222 | ||
c66b721a | 223 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
224 | if (t == NULL) |
225 | return; | |
226 | ||
1da177e4 LT |
227 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
228 | long offset = (long)t->dn_dev_vars[i].data; | |
229 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
1da177e4 LT |
230 | } |
231 | ||
232 | if (dev) { | |
3151a9ab | 233 | dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name; |
1da177e4 | 234 | } else { |
3151a9ab | 235 | dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name; |
1da177e4 LT |
236 | } |
237 | ||
1da177e4 LT |
238 | t->dn_dev_vars[0].extra1 = (void *)dev; |
239 | ||
3151a9ab | 240 | t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars); |
1da177e4 LT |
241 | if (t->sysctl_header == NULL) |
242 | kfree(t); | |
243 | else | |
244 | parms->sysctl = t; | |
245 | } | |
246 | ||
247 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
248 | { | |
249 | if (parms->sysctl) { | |
250 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
251 | parms->sysctl = NULL; | |
252 | unregister_sysctl_table(t->sysctl_header); | |
253 | kfree(t); | |
254 | } | |
255 | } | |
256 | ||
429eb0fa | 257 | static int dn_forwarding_proc(ctl_table *table, int write, |
1da177e4 LT |
258 | void __user *buffer, |
259 | size_t *lenp, loff_t *ppos) | |
260 | { | |
261 | #ifdef CONFIG_DECNET_ROUTER | |
262 | struct net_device *dev = table->extra1; | |
263 | struct dn_dev *dn_db; | |
264 | int err; | |
265 | int tmp, old; | |
266 | ||
267 | if (table->extra1 == NULL) | |
268 | return -EINVAL; | |
269 | ||
fc766e4c | 270 | dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
271 | old = dn_db->parms.forwarding; |
272 | ||
8d65af78 | 273 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
274 | |
275 | if ((err >= 0) && write) { | |
276 | if (dn_db->parms.forwarding < 0) | |
277 | dn_db->parms.forwarding = 0; | |
278 | if (dn_db->parms.forwarding > 2) | |
279 | dn_db->parms.forwarding = 2; | |
280 | /* | |
281 | * What an ugly hack this is... its works, just. It | |
282 | * would be nice if sysctl/proc were just that little | |
283 | * bit more flexible so I don't have to write a special | |
284 | * routine, or suffer hacks like this - SJW | |
285 | */ | |
286 | tmp = dn_db->parms.forwarding; | |
287 | dn_db->parms.forwarding = old; | |
288 | if (dn_db->parms.down) | |
289 | dn_db->parms.down(dev); | |
290 | dn_db->parms.forwarding = tmp; | |
291 | if (dn_db->parms.up) | |
292 | dn_db->parms.up(dev); | |
293 | } | |
294 | ||
295 | return err; | |
296 | #else | |
297 | return -EINVAL; | |
298 | #endif | |
299 | } | |
300 | ||
1da177e4 LT |
301 | #else /* CONFIG_SYSCTL */ |
302 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
303 | { | |
304 | } | |
305 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
306 | { | |
307 | } | |
308 | ||
309 | #endif /* CONFIG_SYSCTL */ | |
310 | ||
311 | static inline __u16 mtu2blksize(struct net_device *dev) | |
312 | { | |
313 | u32 blksize = dev->mtu; | |
314 | if (blksize > 0xffff) | |
315 | blksize = 0xffff; | |
316 | ||
317 | if (dev->type == ARPHRD_ETHER || | |
318 | dev->type == ARPHRD_PPP || | |
319 | dev->type == ARPHRD_IPGRE || | |
320 | dev->type == ARPHRD_LOOPBACK) | |
321 | blksize -= 2; | |
322 | ||
323 | return (__u16)blksize; | |
324 | } | |
325 | ||
326 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
327 | { | |
328 | struct dn_ifaddr *ifa; | |
329 | ||
0da974f4 | 330 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
331 | |
332 | return ifa; | |
333 | } | |
334 | ||
fc766e4c | 335 | static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
1da177e4 | 336 | { |
1e547757 | 337 | kfree_rcu(ifa, rcu); |
fc766e4c ED |
338 | } |
339 | ||
340 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) | |
341 | { | |
342 | struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); | |
1da177e4 LT |
343 | unsigned char mac_addr[6]; |
344 | struct net_device *dev = dn_db->dev; | |
345 | ||
346 | ASSERT_RTNL(); | |
347 | ||
348 | *ifap = ifa1->ifa_next; | |
349 | ||
350 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 351 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 352 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
22bedad3 | 353 | dev_mc_del(dev, mac_addr); |
1da177e4 LT |
354 | } |
355 | } | |
356 | ||
b020b942 | 357 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
e041c683 | 358 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
359 | if (destroy) { |
360 | dn_dev_free_ifa(ifa1); | |
361 | ||
362 | if (dn_db->ifa_list == NULL) | |
363 | dn_dev_delete(dn_db->dev); | |
364 | } | |
365 | } | |
366 | ||
367 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
368 | { | |
369 | struct net_device *dev = dn_db->dev; | |
370 | struct dn_ifaddr *ifa1; | |
371 | unsigned char mac_addr[6]; | |
372 | ||
373 | ASSERT_RTNL(); | |
374 | ||
429eb0fa | 375 | /* Check for duplicates */ |
fc766e4c ED |
376 | for (ifa1 = rtnl_dereference(dn_db->ifa_list); |
377 | ifa1 != NULL; | |
378 | ifa1 = rtnl_dereference(ifa1->ifa_next)) { | |
1da177e4 LT |
379 | if (ifa1->ifa_local == ifa->ifa_local) |
380 | return -EEXIST; | |
381 | } | |
382 | ||
383 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 384 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 385 | dn_dn2eth(mac_addr, ifa->ifa_local); |
22bedad3 | 386 | dev_mc_add(dev, mac_addr); |
1da177e4 LT |
387 | } |
388 | } | |
389 | ||
390 | ifa->ifa_next = dn_db->ifa_list; | |
fc766e4c | 391 | rcu_assign_pointer(dn_db->ifa_list, ifa); |
1da177e4 | 392 | |
b020b942 | 393 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 394 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
395 | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
400 | { | |
fc766e4c | 401 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
402 | int rv; |
403 | ||
404 | if (dn_db == NULL) { | |
405 | int err; | |
406 | dn_db = dn_dev_create(dev, &err); | |
407 | if (dn_db == NULL) | |
408 | return err; | |
409 | } | |
410 | ||
411 | ifa->ifa_dev = dn_db; | |
412 | ||
413 | if (dev->flags & IFF_LOOPBACK) | |
414 | ifa->ifa_scope = RT_SCOPE_HOST; | |
415 | ||
416 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
417 | if (rv) | |
418 | dn_dev_free_ifa(ifa); | |
419 | return rv; | |
420 | } | |
421 | ||
422 | ||
423 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
424 | { | |
425 | char buffer[DN_IFREQ_SIZE]; | |
426 | struct ifreq *ifr = (struct ifreq *)buffer; | |
427 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
428 | struct dn_dev *dn_db; | |
429 | struct net_device *dev; | |
fc766e4c ED |
430 | struct dn_ifaddr *ifa = NULL; |
431 | struct dn_ifaddr __rcu **ifap = NULL; | |
1da177e4 LT |
432 | int ret = 0; |
433 | ||
434 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
435 | return -EFAULT; | |
436 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
437 | ||
881d966b | 438 | dev_load(&init_net, ifr->ifr_name); |
1da177e4 LT |
439 | |
440 | switch(cmd) { | |
441 | case SIOCGIFADDR: | |
442 | break; | |
443 | case SIOCSIFADDR: | |
444 | if (!capable(CAP_NET_ADMIN)) | |
445 | return -EACCES; | |
446 | if (sdn->sdn_family != AF_DECnet) | |
447 | return -EINVAL; | |
448 | break; | |
449 | default: | |
450 | return -EINVAL; | |
451 | } | |
452 | ||
453 | rtnl_lock(); | |
454 | ||
881d966b | 455 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
1da177e4 LT |
456 | ret = -ENODEV; |
457 | goto done; | |
458 | } | |
459 | ||
fc766e4c ED |
460 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { |
461 | for (ifap = &dn_db->ifa_list; | |
462 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
463 | ifap = &ifa->ifa_next) | |
1da177e4 LT |
464 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
465 | break; | |
466 | } | |
467 | ||
468 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
469 | ret = -EADDRNOTAVAIL; | |
470 | goto done; | |
471 | } | |
472 | ||
473 | switch(cmd) { | |
474 | case SIOCGIFADDR: | |
c4ea94ab | 475 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
1da177e4 LT |
476 | goto rarok; |
477 | ||
478 | case SIOCSIFADDR: | |
479 | if (!ifa) { | |
480 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
481 | ret = -ENOBUFS; | |
482 | break; | |
483 | } | |
484 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
485 | } else { | |
486 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
487 | break; | |
488 | dn_dev_del_ifa(dn_db, ifap, 0); | |
489 | } | |
490 | ||
491 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); | |
492 | ||
493 | ret = dn_dev_set_ifa(dev, ifa); | |
494 | } | |
495 | done: | |
496 | rtnl_unlock(); | |
497 | ||
498 | return ret; | |
499 | rarok: | |
500 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
501 | ret = -EFAULT; | |
502 | goto done; | |
503 | } | |
504 | ||
505 | struct net_device *dn_dev_get_default(void) | |
506 | { | |
507 | struct net_device *dev; | |
e5c140a3 | 508 | |
509 | spin_lock(&dndev_lock); | |
1da177e4 LT |
510 | dev = decnet_default_device; |
511 | if (dev) { | |
512 | if (dev->dn_ptr) | |
513 | dev_hold(dev); | |
514 | else | |
515 | dev = NULL; | |
516 | } | |
e5c140a3 | 517 | spin_unlock(&dndev_lock); |
518 | ||
1da177e4 LT |
519 | return dev; |
520 | } | |
521 | ||
522 | int dn_dev_set_default(struct net_device *dev, int force) | |
523 | { | |
524 | struct net_device *old = NULL; | |
525 | int rv = -EBUSY; | |
526 | if (!dev->dn_ptr) | |
527 | return -ENODEV; | |
e5c140a3 | 528 | |
529 | spin_lock(&dndev_lock); | |
1da177e4 LT |
530 | if (force || decnet_default_device == NULL) { |
531 | old = decnet_default_device; | |
532 | decnet_default_device = dev; | |
533 | rv = 0; | |
534 | } | |
e5c140a3 | 535 | spin_unlock(&dndev_lock); |
536 | ||
1da177e4 | 537 | if (old) |
6a57b2ee | 538 | dev_put(old); |
1da177e4 LT |
539 | return rv; |
540 | } | |
541 | ||
542 | static void dn_dev_check_default(struct net_device *dev) | |
543 | { | |
e5c140a3 | 544 | spin_lock(&dndev_lock); |
1da177e4 LT |
545 | if (dev == decnet_default_device) { |
546 | decnet_default_device = NULL; | |
547 | } else { | |
548 | dev = NULL; | |
549 | } | |
e5c140a3 | 550 | spin_unlock(&dndev_lock); |
551 | ||
1da177e4 LT |
552 | if (dev) |
553 | dev_put(dev); | |
554 | } | |
555 | ||
b4d745db ED |
556 | /* |
557 | * Called with RTNL | |
558 | */ | |
1da177e4 LT |
559 | static struct dn_dev *dn_dev_by_index(int ifindex) |
560 | { | |
561 | struct net_device *dev; | |
562 | struct dn_dev *dn_dev = NULL; | |
b4d745db ED |
563 | |
564 | dev = __dev_get_by_index(&init_net, ifindex); | |
565 | if (dev) | |
fc766e4c | 566 | dn_dev = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
567 | |
568 | return dn_dev; | |
569 | } | |
570 | ||
ef7c79ed | 571 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
4a89c256 TG |
572 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
573 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
574 | [IFA_LABEL] = { .type = NLA_STRING, | |
575 | .len = IFNAMSIZ - 1 }, | |
576 | }; | |
577 | ||
578 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 579 | { |
3b1e0a65 | 580 | struct net *net = sock_net(skb->sk); |
4a89c256 | 581 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 582 | struct dn_dev *dn_db; |
4a89c256 | 583 | struct ifaddrmsg *ifm; |
fc766e4c ED |
584 | struct dn_ifaddr *ifa; |
585 | struct dn_ifaddr __rcu **ifap; | |
b854272b DL |
586 | int err = -EINVAL; |
587 | ||
09ad9bc7 | 588 | if (!net_eq(net, &init_net)) |
b854272b | 589 | goto errout; |
4a89c256 TG |
590 | |
591 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
592 | if (err < 0) | |
593 | goto errout; | |
1da177e4 | 594 | |
3ccd8624 | 595 | err = -ENODEV; |
4a89c256 | 596 | ifm = nlmsg_data(nlh); |
1da177e4 | 597 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
598 | goto errout; |
599 | ||
3ccd8624 | 600 | err = -EADDRNOTAVAIL; |
fc766e4c ED |
601 | for (ifap = &dn_db->ifa_list; |
602 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
603 | ifap = &ifa->ifa_next) { | |
4a89c256 TG |
604 | if (tb[IFA_LOCAL] && |
605 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
606 | continue; | |
1da177e4 | 607 | |
4a89c256 | 608 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
609 | continue; |
610 | ||
611 | dn_dev_del_ifa(dn_db, ifap, 1); | |
612 | return 0; | |
613 | } | |
614 | ||
4a89c256 TG |
615 | errout: |
616 | return err; | |
1da177e4 LT |
617 | } |
618 | ||
4a89c256 | 619 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1da177e4 | 620 | { |
3b1e0a65 | 621 | struct net *net = sock_net(skb->sk); |
4a89c256 | 622 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
623 | struct net_device *dev; |
624 | struct dn_dev *dn_db; | |
4a89c256 | 625 | struct ifaddrmsg *ifm; |
1da177e4 | 626 | struct dn_ifaddr *ifa; |
4a89c256 TG |
627 | int err; |
628 | ||
09ad9bc7 | 629 | if (!net_eq(net, &init_net)) |
b854272b DL |
630 | return -EINVAL; |
631 | ||
4a89c256 TG |
632 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
633 | if (err < 0) | |
634 | return err; | |
1da177e4 | 635 | |
4a89c256 | 636 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
637 | return -EINVAL; |
638 | ||
4a89c256 | 639 | ifm = nlmsg_data(nlh); |
881d966b | 640 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4 LT |
641 | return -ENODEV; |
642 | ||
fc766e4c | 643 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
1da177e4 LT |
644 | dn_db = dn_dev_create(dev, &err); |
645 | if (!dn_db) | |
646 | return err; | |
647 | } | |
429eb0fa | 648 | |
1da177e4 LT |
649 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
650 | return -ENOBUFS; | |
651 | ||
4a89c256 TG |
652 | if (tb[IFA_ADDRESS] == NULL) |
653 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
654 | ||
655 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
656 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
1da177e4 LT |
657 | ifa->ifa_flags = ifm->ifa_flags; |
658 | ifa->ifa_scope = ifm->ifa_scope; | |
659 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
660 | |
661 | if (tb[IFA_LABEL]) | |
662 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
663 | else |
664 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
665 | ||
4a89c256 TG |
666 | err = dn_dev_insert_ifa(dn_db, ifa); |
667 | if (err) | |
1da177e4 | 668 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
669 | |
670 | return err; | |
1da177e4 LT |
671 | } |
672 | ||
a6f01cac TG |
673 | static inline size_t dn_ifaddr_nlmsg_size(void) |
674 | { | |
675 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
676 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
677 | + nla_total_size(2) /* IFA_ADDRESS */ | |
678 | + nla_total_size(2); /* IFA_LOCAL */ | |
679 | } | |
680 | ||
4a89c256 TG |
681 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
682 | u32 pid, u32 seq, int event, unsigned int flags) | |
1da177e4 LT |
683 | { |
684 | struct ifaddrmsg *ifm; | |
685 | struct nlmsghdr *nlh; | |
1da177e4 | 686 | |
4a89c256 TG |
687 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
688 | if (nlh == NULL) | |
26932566 | 689 | return -EMSGSIZE; |
1da177e4 | 690 | |
4a89c256 | 691 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
692 | ifm->ifa_family = AF_DECnet; |
693 | ifm->ifa_prefixlen = 16; | |
694 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
695 | ifm->ifa_scope = ifa->ifa_scope; | |
696 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 697 | |
1da177e4 | 698 | if (ifa->ifa_address) |
4a89c256 | 699 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
1da177e4 | 700 | if (ifa->ifa_local) |
4a89c256 | 701 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
1da177e4 | 702 | if (ifa->ifa_label[0]) |
4a89c256 | 703 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
1da177e4 | 704 | |
4a89c256 TG |
705 | return nlmsg_end(skb, nlh); |
706 | ||
707 | nla_put_failure: | |
26932566 PM |
708 | nlmsg_cancel(skb, nlh); |
709 | return -EMSGSIZE; | |
1da177e4 LT |
710 | } |
711 | ||
b020b942 | 712 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
713 | { |
714 | struct sk_buff *skb; | |
dc738dd8 | 715 | int err = -ENOBUFS; |
1da177e4 | 716 | |
a6f01cac | 717 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
718 | if (skb == NULL) |
719 | goto errout; | |
720 | ||
4a89c256 | 721 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
722 | if (err < 0) { |
723 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
724 | WARN_ON(err == -EMSGSIZE); | |
725 | kfree_skb(skb); | |
726 | goto errout; | |
727 | } | |
1ce85fe4 PNA |
728 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
729 | return; | |
dc738dd8 TG |
730 | errout: |
731 | if (err < 0) | |
97c53cac | 732 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4 LT |
733 | } |
734 | ||
4a89c256 | 735 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 736 | { |
3b1e0a65 | 737 | struct net *net = sock_net(skb->sk); |
4a89c256 | 738 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
739 | struct net_device *dev; |
740 | struct dn_dev *dn_db; | |
741 | struct dn_ifaddr *ifa; | |
742 | ||
09ad9bc7 | 743 | if (!net_eq(net, &init_net)) |
b854272b DL |
744 | return 0; |
745 | ||
4a89c256 TG |
746 | skip_ndevs = cb->args[0]; |
747 | skip_naddr = cb->args[1]; | |
748 | ||
7562f876 | 749 | idx = 0; |
e67f88dd ED |
750 | rcu_read_lock(); |
751 | for_each_netdev_rcu(&init_net, dev) { | |
4a89c256 | 752 | if (idx < skip_ndevs) |
7562f876 | 753 | goto cont; |
4a89c256 TG |
754 | else if (idx > skip_ndevs) { |
755 | /* Only skip over addresses for first dev dumped | |
756 | * in this iteration (idx == skip_ndevs) */ | |
757 | skip_naddr = 0; | |
758 | } | |
759 | ||
e67f88dd | 760 | if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
7562f876 | 761 | goto cont; |
1da177e4 | 762 | |
e67f88dd ED |
763 | for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; |
764 | ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { | |
4a89c256 | 765 | if (dn_idx < skip_naddr) |
a2221f30 | 766 | continue; |
1da177e4 | 767 | |
4a89c256 TG |
768 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
769 | cb->nlh->nlmsg_seq, RTM_NEWADDR, | |
770 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
771 | goto done; |
772 | } | |
7562f876 PE |
773 | cont: |
774 | idx++; | |
1da177e4 LT |
775 | } |
776 | done: | |
e67f88dd | 777 | rcu_read_unlock(); |
1da177e4 LT |
778 | cb->args[0] = idx; |
779 | cb->args[1] = dn_idx; | |
780 | ||
781 | return skb->len; | |
782 | } | |
783 | ||
c4ea94ab | 784 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 | 785 | { |
fc766e4c | 786 | struct dn_dev *dn_db; |
1da177e4 LT |
787 | struct dn_ifaddr *ifa; |
788 | int rv = -ENODEV; | |
41bdecf1 | 789 | |
fc766e4c ED |
790 | rcu_read_lock(); |
791 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
792 | if (dn_db == NULL) |
793 | goto out; | |
41bdecf1 | 794 | |
fc766e4c | 795 | ifa = rcu_dereference(dn_db->ifa_list); |
1da177e4 LT |
796 | if (ifa != NULL) { |
797 | *addr = ifa->ifa_local; | |
798 | rv = 0; | |
799 | } | |
800 | out: | |
fc766e4c | 801 | rcu_read_unlock(); |
1da177e4 LT |
802 | return rv; |
803 | } | |
804 | ||
429eb0fa | 805 | /* |
1da177e4 LT |
806 | * Find a default address to bind to. |
807 | * | |
808 | * This is one of those areas where the initial VMS concepts don't really | |
809 | * map onto the Linux concepts, and since we introduced multiple addresses | |
810 | * per interface we have to cope with slightly odd ways of finding out what | |
811 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
812 | * a sensible default. Eventually the routing code will take care of all the | |
813 | * nasties for us I hope. | |
814 | */ | |
c4ea94ab | 815 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
816 | { |
817 | struct net_device *dev; | |
818 | int rv; | |
819 | dev = dn_dev_get_default(); | |
820 | last_chance: | |
821 | if (dev) { | |
1da177e4 | 822 | rv = dn_dev_get_first(dev, addr); |
1da177e4 | 823 | dev_put(dev); |
2774c7ab | 824 | if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4 LT |
825 | return rv; |
826 | } | |
2774c7ab | 827 | dev = init_net.loopback_dev; |
1da177e4 LT |
828 | dev_hold(dev); |
829 | goto last_chance; | |
830 | } | |
831 | ||
832 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
833 | { | |
429eb0fa YH |
834 | struct endnode_hello_message *msg; |
835 | struct sk_buff *skb = NULL; | |
836 | __le16 *pktlen; | |
fc766e4c | 837 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 | 838 | |
429eb0fa | 839 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
840 | return; |
841 | ||
429eb0fa | 842 | skb->dev = dev; |
1da177e4 | 843 | |
429eb0fa | 844 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 845 | |
429eb0fa YH |
846 | msg->msgflg = 0x0D; |
847 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 848 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa | 849 | msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa8 | 850 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fa YH |
851 | msg->area = 0x00; |
852 | memset(msg->seed, 0, 8); | |
853 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
854 | |
855 | if (dn_db->router) { | |
856 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
857 | dn_dn2eth(msg->neighbor, dn->addr); | |
858 | } | |
859 | ||
c4106aa8 | 860 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fa YH |
861 | msg->mpd = 0x00; |
862 | msg->datalen = 0x02; | |
863 | memset(msg->data, 0xAA, 2); | |
864 | ||
865 | pktlen = (__le16 *)skb_push(skb,2); | |
c4106aa8 | 866 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 867 | |
c1d2bbe1 | 868 | skb_reset_network_header(skb); |
1da177e4 LT |
869 | |
870 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
871 | } | |
872 | ||
873 | ||
874 | #define DRDELAY (5 * HZ) | |
875 | ||
876 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
877 | { | |
878 | /* First check time since device went up */ | |
879 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
880 | return 0; | |
881 | ||
882 | /* If there is no router, then yes... */ | |
883 | if (!dn_db->router) | |
884 | return 1; | |
885 | ||
886 | /* otherwise only if we have a higher priority or.. */ | |
887 | if (dn->priority < dn_db->parms.priority) | |
888 | return 1; | |
889 | ||
890 | /* if we have equal priority and a higher node number */ | |
891 | if (dn->priority != dn_db->parms.priority) | |
892 | return 0; | |
893 | ||
c4106aa8 | 894 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4 LT |
895 | return 1; |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
900 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
901 | { | |
902 | int n; | |
fc766e4c | 903 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
904 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
905 | struct sk_buff *skb; | |
906 | size_t size; | |
907 | unsigned char *ptr; | |
908 | unsigned char *i1, *i2; | |
c4ea94ab | 909 | __le16 *pktlen; |
1da177e4 LT |
910 | char *src; |
911 | ||
912 | if (mtu2blksize(dev) < (26 + 7)) | |
913 | return; | |
914 | ||
915 | n = mtu2blksize(dev) - 26; | |
916 | n /= 7; | |
917 | ||
918 | if (n > 32) | |
919 | n = 32; | |
920 | ||
921 | size = 2 + 26 + 7 * n; | |
922 | ||
923 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
924 | return; | |
925 | ||
926 | skb->dev = dev; | |
927 | ptr = skb_put(skb, size); | |
928 | ||
929 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
930 | *ptr++ = 2; /* ECO */ | |
931 | *ptr++ = 0; | |
932 | *ptr++ = 0; | |
933 | dn_dn2eth(ptr, ifa->ifa_local); | |
934 | src = ptr; | |
935 | ptr += ETH_ALEN; | |
429eb0fa | 936 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 937 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa8 | 938 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4 | 939 | ptr += 2; |
429eb0fa | 940 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 941 | *ptr++ = 0; /* Area: Reserved */ |
c4106aa8 | 942 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
943 | ptr += 2; |
944 | *ptr++ = 0; /* MPD: Reserved */ | |
945 | i1 = ptr++; | |
946 | memset(ptr, 0, 7); /* Name: Reserved */ | |
947 | ptr += 7; | |
948 | i2 = ptr++; | |
949 | ||
950 | n = dn_neigh_elist(dev, ptr, n); | |
951 | ||
952 | *i2 = 7 * n; | |
953 | *i1 = 8 + *i2; | |
954 | ||
955 | skb_trim(skb, (27 + *i2)); | |
956 | ||
c4ea94ab | 957 | pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa8 | 958 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 959 | |
c1d2bbe1 | 960 | skb_reset_network_header(skb); |
1da177e4 LT |
961 | |
962 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
963 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
964 | if (skb2) { | |
965 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
966 | } | |
967 | } | |
968 | ||
969 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
970 | } | |
971 | ||
972 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
973 | { | |
fc766e4c | 974 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
975 | |
976 | if (dn_db->parms.forwarding == 0) | |
977 | dn_send_endnode_hello(dev, ifa); | |
978 | else | |
979 | dn_send_router_hello(dev, ifa); | |
980 | } | |
981 | ||
982 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
983 | { | |
984 | int tdlen = 16; | |
985 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
986 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
987 | int i; | |
988 | unsigned char *ptr; | |
989 | char src[ETH_ALEN]; | |
990 | ||
991 | if (skb == NULL) | |
992 | return ; | |
993 | ||
994 | skb->dev = dev; | |
995 | skb_push(skb, dev->hard_header_len); | |
996 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
997 | ||
998 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 999 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
1000 | ptr += 2; |
1001 | *ptr++ = tdlen; | |
1002 | ||
1003 | for(i = 0; i < tdlen; i++) | |
1004 | *ptr++ = 0252; | |
1005 | ||
1006 | dn_dn2eth(src, ifa->ifa_local); | |
1007 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1008 | } | |
1009 | ||
1010 | static int dn_eth_up(struct net_device *dev) | |
1011 | { | |
fc766e4c | 1012 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1013 | |
1014 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1015 | dev_mc_add(dev, dn_rt_all_end_mcast); |
1da177e4 | 1016 | else |
22bedad3 | 1017 | dev_mc_add(dev, dn_rt_all_rt_mcast); |
1da177e4 | 1018 | |
1da177e4 LT |
1019 | dn_db->use_long = 1; |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static void dn_eth_down(struct net_device *dev) | |
1025 | { | |
fc766e4c | 1026 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1027 | |
1028 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1029 | dev_mc_del(dev, dn_rt_all_end_mcast); |
1da177e4 | 1030 | else |
22bedad3 | 1031 | dev_mc_del(dev, dn_rt_all_rt_mcast); |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | static void dn_dev_set_timer(struct net_device *dev); | |
1035 | ||
1036 | static void dn_dev_timer_func(unsigned long arg) | |
1037 | { | |
1038 | struct net_device *dev = (struct net_device *)arg; | |
fc766e4c | 1039 | struct dn_dev *dn_db; |
1da177e4 LT |
1040 | struct dn_ifaddr *ifa; |
1041 | ||
fc766e4c ED |
1042 | rcu_read_lock(); |
1043 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
1044 | if (dn_db->t3 <= dn_db->parms.t2) { |
1045 | if (dn_db->parms.timer3) { | |
fc766e4c ED |
1046 | for (ifa = rcu_dereference(dn_db->ifa_list); |
1047 | ifa; | |
1048 | ifa = rcu_dereference(ifa->ifa_next)) { | |
1da177e4 LT |
1049 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
1050 | dn_db->parms.timer3(dev, ifa); | |
1051 | } | |
1052 | } | |
1053 | dn_db->t3 = dn_db->parms.t3; | |
1054 | } else { | |
1055 | dn_db->t3 -= dn_db->parms.t2; | |
1056 | } | |
fc766e4c | 1057 | rcu_read_unlock(); |
1da177e4 LT |
1058 | dn_dev_set_timer(dev); |
1059 | } | |
1060 | ||
1061 | static void dn_dev_set_timer(struct net_device *dev) | |
1062 | { | |
fc766e4c | 1063 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1064 | |
1065 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1066 | dn_db->parms.t2 = dn_db->parms.t3; | |
1067 | ||
1068 | dn_db->timer.data = (unsigned long)dev; | |
1069 | dn_db->timer.function = dn_dev_timer_func; | |
1070 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1071 | ||
1072 | add_timer(&dn_db->timer); | |
1073 | } | |
1074 | ||
5eaa65b2 | 1075 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4 LT |
1076 | { |
1077 | int i; | |
1078 | struct dn_dev_parms *p = dn_dev_list; | |
1079 | struct dn_dev *dn_db; | |
1080 | ||
1081 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1082 | if (p->type == dev->type) | |
1083 | break; | |
1084 | } | |
1085 | ||
1086 | *err = -ENODEV; | |
1087 | if (i == DN_DEV_LIST_SIZE) | |
1088 | return NULL; | |
1089 | ||
1090 | *err = -ENOBUFS; | |
0da974f4 | 1091 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1092 | return NULL; |
1093 | ||
1da177e4 | 1094 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
fc766e4c ED |
1095 | |
1096 | rcu_assign_pointer(dev->dn_ptr, dn_db); | |
1da177e4 LT |
1097 | dn_db->dev = dev; |
1098 | init_timer(&dn_db->timer); | |
1099 | ||
1100 | dn_db->uptime = jiffies; | |
95743deb EB |
1101 | |
1102 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1103 | if (!dn_db->neigh_parms) { | |
fc766e4c | 1104 | rcu_assign_pointer(dev->dn_ptr, NULL); |
95743deb EB |
1105 | kfree(dn_db); |
1106 | return NULL; | |
1107 | } | |
1108 | ||
1da177e4 LT |
1109 | if (dn_db->parms.up) { |
1110 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1111 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1112 | dev->dn_ptr = NULL; |
1113 | kfree(dn_db); | |
1114 | return NULL; | |
1115 | } | |
1116 | } | |
1117 | ||
1da177e4 LT |
1118 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1119 | ||
1120 | dn_dev_set_timer(dev); | |
1121 | ||
1122 | *err = 0; | |
1123 | return dn_db; | |
1124 | } | |
1125 | ||
1126 | ||
1127 | /* | |
1128 | * This processes a device up event. We only start up | |
1129 | * the loopback device & ethernet devices with correct | |
b595076a | 1130 | * MAC addresses automatically. Others must be started |
1da177e4 LT |
1131 | * specifically. |
1132 | * | |
1133 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1134 | * with using decnet_address here and for autobind, it will be one less thing | |
1135 | * for users to worry about setting up. | |
1136 | */ | |
1137 | ||
1138 | void dn_dev_up(struct net_device *dev) | |
1139 | { | |
1140 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1141 | __le16 addr = decnet_address; |
1da177e4 | 1142 | int maybe_default = 0; |
fc766e4c | 1143 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1144 | |
1145 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1146 | return; | |
1147 | ||
1148 | /* | |
1149 | * Need to ensure that loopback device has a dn_db attached to it | |
1150 | * to allow creation of neighbours against it, even though it might | |
1151 | * not have a local address of its own. Might as well do the same for | |
1152 | * all autoconfigured interfaces. | |
1153 | */ | |
1154 | if (dn_db == NULL) { | |
1155 | int err; | |
1156 | dn_db = dn_dev_create(dev, &err); | |
1157 | if (dn_db == NULL) | |
1158 | return; | |
1159 | } | |
1160 | ||
1161 | if (dev->type == ARPHRD_ETHER) { | |
1162 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1163 | return; | |
c4ea94ab | 1164 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1165 | maybe_default = 1; |
1166 | } | |
1167 | ||
1168 | if (addr == 0) | |
1169 | return; | |
1170 | ||
1171 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1172 | return; | |
1173 | ||
1174 | ifa->ifa_local = ifa->ifa_address = addr; | |
1175 | ifa->ifa_flags = 0; | |
1176 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1177 | strcpy(ifa->ifa_label, dev->name); | |
1178 | ||
1179 | dn_dev_set_ifa(dev, ifa); | |
1180 | ||
1181 | /* | |
1182 | * Automagically set the default device to the first automatically | |
1183 | * configured ethernet card in the system. | |
1184 | */ | |
1185 | if (maybe_default) { | |
1186 | dev_hold(dev); | |
1187 | if (dn_dev_set_default(dev, 0)) | |
1188 | dev_put(dev); | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | static void dn_dev_delete(struct net_device *dev) | |
1193 | { | |
fc766e4c | 1194 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1195 | |
1196 | if (dn_db == NULL) | |
1197 | return; | |
1198 | ||
1199 | del_timer_sync(&dn_db->timer); | |
1200 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1201 | dn_dev_check_default(dev); | |
1202 | neigh_ifdown(&dn_neigh_table, dev); | |
1203 | ||
1204 | if (dn_db->parms.down) | |
1205 | dn_db->parms.down(dev); | |
1206 | ||
1207 | dev->dn_ptr = NULL; | |
1208 | ||
1209 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1210 | neigh_ifdown(&dn_neigh_table, dev); | |
1211 | ||
1212 | if (dn_db->router) | |
1213 | neigh_release(dn_db->router); | |
1214 | if (dn_db->peer) | |
1215 | neigh_release(dn_db->peer); | |
1216 | ||
1217 | kfree(dn_db); | |
1218 | } | |
1219 | ||
1220 | void dn_dev_down(struct net_device *dev) | |
1221 | { | |
fc766e4c | 1222 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1223 | struct dn_ifaddr *ifa; |
1224 | ||
1225 | if (dn_db == NULL) | |
1226 | return; | |
1227 | ||
fc766e4c | 1228 | while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
1da177e4 LT |
1229 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
1230 | dn_dev_free_ifa(ifa); | |
1231 | } | |
1232 | ||
1233 | dn_dev_delete(dev); | |
1234 | } | |
1235 | ||
1236 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1237 | { | |
1da177e4 LT |
1238 | } |
1239 | ||
1240 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1241 | { | |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | void dn_dev_hello(struct sk_buff *skb) | |
1245 | { | |
1da177e4 LT |
1246 | } |
1247 | ||
1248 | void dn_dev_devices_off(void) | |
1249 | { | |
1250 | struct net_device *dev; | |
1251 | ||
1252 | rtnl_lock(); | |
881d966b | 1253 | for_each_netdev(&init_net, dev) |
1da177e4 LT |
1254 | dn_dev_down(dev); |
1255 | rtnl_unlock(); | |
1256 | ||
1257 | } | |
1258 | ||
1259 | void dn_dev_devices_on(void) | |
1260 | { | |
1261 | struct net_device *dev; | |
1262 | ||
1263 | rtnl_lock(); | |
881d966b | 1264 | for_each_netdev(&init_net, dev) { |
1da177e4 LT |
1265 | if (dev->flags & IFF_UP) |
1266 | dn_dev_up(dev); | |
1267 | } | |
1268 | rtnl_unlock(); | |
1269 | } | |
1270 | ||
1271 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1272 | { | |
e041c683 | 1273 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1274 | } |
1275 | ||
1276 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1277 | { | |
e041c683 | 1278 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | #ifdef CONFIG_PROC_FS | |
7562f876 | 1282 | static inline int is_dn_dev(struct net_device *dev) |
1da177e4 | 1283 | { |
7562f876 | 1284 | return dev->dn_ptr != NULL; |
1da177e4 LT |
1285 | } |
1286 | ||
7562f876 | 1287 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
fc766e4c | 1288 | __acquires(RCU) |
1da177e4 | 1289 | { |
7562f876 | 1290 | int i; |
1da177e4 LT |
1291 | struct net_device *dev; |
1292 | ||
fa918602 | 1293 | rcu_read_lock(); |
1da177e4 | 1294 | |
7562f876 PE |
1295 | if (*pos == 0) |
1296 | return SEQ_START_TOKEN; | |
1297 | ||
1298 | i = 1; | |
fa918602 | 1299 | for_each_netdev_rcu(&init_net, dev) { |
7562f876 PE |
1300 | if (!is_dn_dev(dev)) |
1301 | continue; | |
1302 | ||
1303 | if (i++ == *pos) | |
1304 | return dev; | |
1da177e4 | 1305 | } |
7562f876 PE |
1306 | |
1307 | return NULL; | |
1da177e4 LT |
1308 | } |
1309 | ||
1310 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1311 | { | |
7562f876 | 1312 | struct net_device *dev; |
1da177e4 | 1313 | |
1da177e4 | 1314 | ++*pos; |
7562f876 PE |
1315 | |
1316 | dev = (struct net_device *)v; | |
1317 | if (v == SEQ_START_TOKEN) | |
881d966b | 1318 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 1319 | |
fa918602 | 1320 | for_each_netdev_continue_rcu(&init_net, dev) { |
7562f876 PE |
1321 | if (!is_dn_dev(dev)) |
1322 | continue; | |
1323 | ||
1324 | return dev; | |
1325 | } | |
1326 | ||
1327 | return NULL; | |
1da177e4 LT |
1328 | } |
1329 | ||
1330 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
fc766e4c | 1331 | __releases(RCU) |
1da177e4 | 1332 | { |
fa918602 | 1333 | rcu_read_unlock(); |
1da177e4 LT |
1334 | } |
1335 | ||
1336 | static char *dn_type2asc(char type) | |
1337 | { | |
1338 | switch(type) { | |
1339 | case DN_DEV_BCAST: | |
1340 | return "B"; | |
1341 | case DN_DEV_UCAST: | |
1342 | return "U"; | |
1343 | case DN_DEV_MPOINT: | |
1344 | return "M"; | |
1345 | } | |
1346 | ||
1347 | return "?"; | |
1348 | } | |
1349 | ||
1350 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1351 | { | |
1352 | if (v == SEQ_START_TOKEN) | |
429eb0fa | 1353 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1354 | else { |
1355 | struct net_device *dev = v; | |
1356 | char peer_buf[DN_ASCBUF_LEN]; | |
1357 | char router_buf[DN_ASCBUF_LEN]; | |
fc766e4c | 1358 | struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4 | 1359 | |
429eb0fa | 1360 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1361 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1362 | dev->name ? dev->name : "???", |
1363 | dn_type2asc(dn_db->parms.mode), | |
1364 | 0, 0, | |
1da177e4 LT |
1365 | dn_db->t3, dn_db->parms.t3, |
1366 | mtu2blksize(dev), | |
1367 | dn_db->parms.priority, | |
1368 | dn_db->parms.state, dn_db->parms.name, | |
c4106aa8 HH |
1369 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1370 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1371 | } |
1372 | return 0; | |
1373 | } | |
1374 | ||
56b3d975 | 1375 | static const struct seq_operations dn_dev_seq_ops = { |
1da177e4 LT |
1376 | .start = dn_dev_seq_start, |
1377 | .next = dn_dev_seq_next, | |
1378 | .stop = dn_dev_seq_stop, | |
1379 | .show = dn_dev_seq_show, | |
1380 | }; | |
1381 | ||
1382 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1383 | { | |
1384 | return seq_open(file, &dn_dev_seq_ops); | |
1385 | } | |
1386 | ||
9a32144e | 1387 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
1388 | .owner = THIS_MODULE, |
1389 | .open = dn_dev_seq_open, | |
1390 | .read = seq_read, | |
1391 | .llseek = seq_lseek, | |
1392 | .release = seq_release, | |
1393 | }; | |
1394 | ||
1395 | #endif /* CONFIG_PROC_FS */ | |
1396 | ||
4e058063 | 1397 | static int addr[2]; |
1da177e4 LT |
1398 | module_param_array(addr, int, NULL, 0444); |
1399 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1400 | ||
1401 | void __init dn_dev_init(void) | |
1402 | { | |
429eb0fa YH |
1403 | if (addr[0] > 63 || addr[0] < 0) { |
1404 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1405 | return; | |
1406 | } | |
1da177e4 | 1407 | |
429eb0fa YH |
1408 | if (addr[1] > 1023 || addr[1] < 0) { |
1409 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1410 | return; | |
1411 | } | |
1da177e4 | 1412 | |
c4106aa8 | 1413 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1414 | |
1415 | dn_dev_devices_on(); | |
1416 | ||
c7ac8679 GR |
1417 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL); |
1418 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL); | |
1419 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL); | |
1da177e4 | 1420 | |
457c4cbc | 1421 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
1da177e4 LT |
1422 | |
1423 | #ifdef CONFIG_SYSCTL | |
1424 | { | |
1425 | int i; | |
1426 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1427 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); | |
1428 | } | |
1429 | #endif /* CONFIG_SYSCTL */ | |
1430 | } | |
1431 | ||
1432 | void __exit dn_dev_cleanup(void) | |
1433 | { | |
1da177e4 LT |
1434 | #ifdef CONFIG_SYSCTL |
1435 | { | |
1436 | int i; | |
1437 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1438 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1439 | } | |
1440 | #endif /* CONFIG_SYSCTL */ | |
1441 | ||
457c4cbc | 1442 | proc_net_remove(&init_net, "decnet_dev"); |
1da177e4 LT |
1443 | |
1444 | dn_dev_devices_off(); | |
1445 | } |