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Commit | Line | Data |
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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 | ||
3151a9ab PE |
212 | #define DN_CTL_PATH_DEV 3 |
213 | ||
214 | struct ctl_path dn_ctl_path[] = { | |
f8572d8f EB |
215 | { .procname = "net", }, |
216 | { .procname = "decnet", }, | |
217 | { .procname = "conf", }, | |
3151a9ab PE |
218 | { /* to be set */ }, |
219 | { }, | |
220 | }; | |
221 | ||
c66b721a | 222 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
223 | if (t == NULL) |
224 | return; | |
225 | ||
1da177e4 LT |
226 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
227 | long offset = (long)t->dn_dev_vars[i].data; | |
228 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
1da177e4 LT |
229 | } |
230 | ||
231 | if (dev) { | |
3151a9ab | 232 | dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name; |
1da177e4 | 233 | } else { |
3151a9ab | 234 | dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name; |
1da177e4 LT |
235 | } |
236 | ||
1da177e4 LT |
237 | t->dn_dev_vars[0].extra1 = (void *)dev; |
238 | ||
5dd3df10 | 239 | t->sysctl_header = register_net_sysctl_table(&init_net, dn_ctl_path, t->dn_dev_vars); |
1da177e4 LT |
240 | if (t->sysctl_header == NULL) |
241 | kfree(t); | |
242 | else | |
243 | parms->sysctl = t; | |
244 | } | |
245 | ||
246 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
247 | { | |
248 | if (parms->sysctl) { | |
249 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
250 | parms->sysctl = NULL; | |
5dd3df10 | 251 | unregister_net_sysctl_table(t->sysctl_header); |
1da177e4 LT |
252 | kfree(t); |
253 | } | |
254 | } | |
255 | ||
429eb0fa | 256 | static int dn_forwarding_proc(ctl_table *table, int write, |
1da177e4 LT |
257 | void __user *buffer, |
258 | size_t *lenp, loff_t *ppos) | |
259 | { | |
260 | #ifdef CONFIG_DECNET_ROUTER | |
261 | struct net_device *dev = table->extra1; | |
262 | struct dn_dev *dn_db; | |
263 | int err; | |
264 | int tmp, old; | |
265 | ||
266 | if (table->extra1 == NULL) | |
267 | return -EINVAL; | |
268 | ||
fc766e4c | 269 | dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
270 | old = dn_db->parms.forwarding; |
271 | ||
8d65af78 | 272 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
1da177e4 LT |
273 | |
274 | if ((err >= 0) && write) { | |
275 | if (dn_db->parms.forwarding < 0) | |
276 | dn_db->parms.forwarding = 0; | |
277 | if (dn_db->parms.forwarding > 2) | |
278 | dn_db->parms.forwarding = 2; | |
279 | /* | |
280 | * What an ugly hack this is... its works, just. It | |
281 | * would be nice if sysctl/proc were just that little | |
282 | * bit more flexible so I don't have to write a special | |
283 | * routine, or suffer hacks like this - SJW | |
284 | */ | |
285 | tmp = dn_db->parms.forwarding; | |
286 | dn_db->parms.forwarding = old; | |
287 | if (dn_db->parms.down) | |
288 | dn_db->parms.down(dev); | |
289 | dn_db->parms.forwarding = tmp; | |
290 | if (dn_db->parms.up) | |
291 | dn_db->parms.up(dev); | |
292 | } | |
293 | ||
294 | return err; | |
295 | #else | |
296 | return -EINVAL; | |
297 | #endif | |
298 | } | |
299 | ||
1da177e4 LT |
300 | #else /* CONFIG_SYSCTL */ |
301 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
302 | { | |
303 | } | |
304 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
305 | { | |
306 | } | |
307 | ||
308 | #endif /* CONFIG_SYSCTL */ | |
309 | ||
310 | static inline __u16 mtu2blksize(struct net_device *dev) | |
311 | { | |
312 | u32 blksize = dev->mtu; | |
313 | if (blksize > 0xffff) | |
314 | blksize = 0xffff; | |
315 | ||
316 | if (dev->type == ARPHRD_ETHER || | |
317 | dev->type == ARPHRD_PPP || | |
318 | dev->type == ARPHRD_IPGRE || | |
319 | dev->type == ARPHRD_LOOPBACK) | |
320 | blksize -= 2; | |
321 | ||
322 | return (__u16)blksize; | |
323 | } | |
324 | ||
325 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
326 | { | |
327 | struct dn_ifaddr *ifa; | |
328 | ||
0da974f4 | 329 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
330 | |
331 | return ifa; | |
332 | } | |
333 | ||
fc766e4c | 334 | static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
1da177e4 | 335 | { |
1e547757 | 336 | kfree_rcu(ifa, rcu); |
fc766e4c ED |
337 | } |
338 | ||
339 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) | |
340 | { | |
341 | struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); | |
1da177e4 LT |
342 | unsigned char mac_addr[6]; |
343 | struct net_device *dev = dn_db->dev; | |
344 | ||
345 | ASSERT_RTNL(); | |
346 | ||
347 | *ifap = ifa1->ifa_next; | |
348 | ||
349 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 350 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 351 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
22bedad3 | 352 | dev_mc_del(dev, mac_addr); |
1da177e4 LT |
353 | } |
354 | } | |
355 | ||
b020b942 | 356 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
e041c683 | 357 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
358 | if (destroy) { |
359 | dn_dev_free_ifa(ifa1); | |
360 | ||
361 | if (dn_db->ifa_list == NULL) | |
362 | dn_dev_delete(dn_db->dev); | |
363 | } | |
364 | } | |
365 | ||
366 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
367 | { | |
368 | struct net_device *dev = dn_db->dev; | |
369 | struct dn_ifaddr *ifa1; | |
370 | unsigned char mac_addr[6]; | |
371 | ||
372 | ASSERT_RTNL(); | |
373 | ||
429eb0fa | 374 | /* Check for duplicates */ |
fc766e4c ED |
375 | for (ifa1 = rtnl_dereference(dn_db->ifa_list); |
376 | ifa1 != NULL; | |
377 | ifa1 = rtnl_dereference(ifa1->ifa_next)) { | |
1da177e4 LT |
378 | if (ifa1->ifa_local == ifa->ifa_local) |
379 | return -EEXIST; | |
380 | } | |
381 | ||
382 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 383 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 384 | dn_dn2eth(mac_addr, ifa->ifa_local); |
22bedad3 | 385 | dev_mc_add(dev, mac_addr); |
1da177e4 LT |
386 | } |
387 | } | |
388 | ||
389 | ifa->ifa_next = dn_db->ifa_list; | |
cf778b00 | 390 | rcu_assign_pointer(dn_db->ifa_list, ifa); |
1da177e4 | 391 | |
b020b942 | 392 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 393 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
394 | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
399 | { | |
fc766e4c | 400 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
401 | int rv; |
402 | ||
403 | if (dn_db == NULL) { | |
404 | int err; | |
405 | dn_db = dn_dev_create(dev, &err); | |
406 | if (dn_db == NULL) | |
407 | return err; | |
408 | } | |
409 | ||
410 | ifa->ifa_dev = dn_db; | |
411 | ||
412 | if (dev->flags & IFF_LOOPBACK) | |
413 | ifa->ifa_scope = RT_SCOPE_HOST; | |
414 | ||
415 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
416 | if (rv) | |
417 | dn_dev_free_ifa(ifa); | |
418 | return rv; | |
419 | } | |
420 | ||
421 | ||
422 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
423 | { | |
424 | char buffer[DN_IFREQ_SIZE]; | |
425 | struct ifreq *ifr = (struct ifreq *)buffer; | |
426 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
427 | struct dn_dev *dn_db; | |
428 | struct net_device *dev; | |
fc766e4c ED |
429 | struct dn_ifaddr *ifa = NULL; |
430 | struct dn_ifaddr __rcu **ifap = NULL; | |
1da177e4 LT |
431 | int ret = 0; |
432 | ||
433 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
434 | return -EFAULT; | |
435 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
436 | ||
881d966b | 437 | dev_load(&init_net, ifr->ifr_name); |
1da177e4 | 438 | |
06f8fe11 JP |
439 | switch (cmd) { |
440 | case SIOCGIFADDR: | |
441 | break; | |
442 | case SIOCSIFADDR: | |
443 | if (!capable(CAP_NET_ADMIN)) | |
444 | return -EACCES; | |
445 | if (sdn->sdn_family != AF_DECnet) | |
1da177e4 | 446 | return -EINVAL; |
06f8fe11 JP |
447 | break; |
448 | default: | |
449 | return -EINVAL; | |
1da177e4 LT |
450 | } |
451 | ||
452 | rtnl_lock(); | |
453 | ||
881d966b | 454 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
1da177e4 LT |
455 | ret = -ENODEV; |
456 | goto done; | |
457 | } | |
458 | ||
fc766e4c ED |
459 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { |
460 | for (ifap = &dn_db->ifa_list; | |
461 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
462 | ifap = &ifa->ifa_next) | |
1da177e4 LT |
463 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
464 | break; | |
465 | } | |
466 | ||
467 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
468 | ret = -EADDRNOTAVAIL; | |
469 | goto done; | |
470 | } | |
471 | ||
06f8fe11 JP |
472 | switch (cmd) { |
473 | case SIOCGIFADDR: | |
474 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; | |
475 | goto rarok; | |
476 | ||
477 | case SIOCSIFADDR: | |
478 | if (!ifa) { | |
479 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
480 | ret = -ENOBUFS; | |
481 | break; | |
1da177e4 | 482 | } |
06f8fe11 JP |
483 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
484 | } else { | |
485 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
486 | break; | |
487 | dn_dev_del_ifa(dn_db, ifap, 0); | |
488 | } | |
1da177e4 | 489 | |
06f8fe11 | 490 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
1da177e4 | 491 | |
06f8fe11 | 492 | ret = dn_dev_set_ifa(dev, ifa); |
1da177e4 LT |
493 | } |
494 | done: | |
495 | rtnl_unlock(); | |
496 | ||
497 | return ret; | |
498 | rarok: | |
499 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
500 | ret = -EFAULT; | |
501 | goto done; | |
502 | } | |
503 | ||
504 | struct net_device *dn_dev_get_default(void) | |
505 | { | |
506 | struct net_device *dev; | |
e5c140a3 | 507 | |
508 | spin_lock(&dndev_lock); | |
1da177e4 LT |
509 | dev = decnet_default_device; |
510 | if (dev) { | |
511 | if (dev->dn_ptr) | |
512 | dev_hold(dev); | |
513 | else | |
514 | dev = NULL; | |
515 | } | |
e5c140a3 | 516 | spin_unlock(&dndev_lock); |
517 | ||
1da177e4 LT |
518 | return dev; |
519 | } | |
520 | ||
521 | int dn_dev_set_default(struct net_device *dev, int force) | |
522 | { | |
523 | struct net_device *old = NULL; | |
524 | int rv = -EBUSY; | |
525 | if (!dev->dn_ptr) | |
526 | return -ENODEV; | |
e5c140a3 | 527 | |
528 | spin_lock(&dndev_lock); | |
1da177e4 LT |
529 | if (force || decnet_default_device == NULL) { |
530 | old = decnet_default_device; | |
531 | decnet_default_device = dev; | |
532 | rv = 0; | |
533 | } | |
e5c140a3 | 534 | spin_unlock(&dndev_lock); |
535 | ||
1da177e4 | 536 | if (old) |
6a57b2ee | 537 | dev_put(old); |
1da177e4 LT |
538 | return rv; |
539 | } | |
540 | ||
541 | static void dn_dev_check_default(struct net_device *dev) | |
542 | { | |
e5c140a3 | 543 | spin_lock(&dndev_lock); |
1da177e4 LT |
544 | if (dev == decnet_default_device) { |
545 | decnet_default_device = NULL; | |
546 | } else { | |
547 | dev = NULL; | |
548 | } | |
e5c140a3 | 549 | spin_unlock(&dndev_lock); |
550 | ||
1da177e4 LT |
551 | if (dev) |
552 | dev_put(dev); | |
553 | } | |
554 | ||
b4d745db ED |
555 | /* |
556 | * Called with RTNL | |
557 | */ | |
1da177e4 LT |
558 | static struct dn_dev *dn_dev_by_index(int ifindex) |
559 | { | |
560 | struct net_device *dev; | |
561 | struct dn_dev *dn_dev = NULL; | |
b4d745db ED |
562 | |
563 | dev = __dev_get_by_index(&init_net, ifindex); | |
564 | if (dev) | |
fc766e4c | 565 | dn_dev = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
566 | |
567 | return dn_dev; | |
568 | } | |
569 | ||
ef7c79ed | 570 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
4a89c256 TG |
571 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
572 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
573 | [IFA_LABEL] = { .type = NLA_STRING, | |
574 | .len = IFNAMSIZ - 1 }, | |
575 | }; | |
576 | ||
577 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 578 | { |
3b1e0a65 | 579 | struct net *net = sock_net(skb->sk); |
4a89c256 | 580 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 581 | struct dn_dev *dn_db; |
4a89c256 | 582 | struct ifaddrmsg *ifm; |
fc766e4c ED |
583 | struct dn_ifaddr *ifa; |
584 | struct dn_ifaddr __rcu **ifap; | |
b854272b DL |
585 | int err = -EINVAL; |
586 | ||
09ad9bc7 | 587 | if (!net_eq(net, &init_net)) |
b854272b | 588 | goto errout; |
4a89c256 TG |
589 | |
590 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
591 | if (err < 0) | |
592 | goto errout; | |
1da177e4 | 593 | |
3ccd8624 | 594 | err = -ENODEV; |
4a89c256 | 595 | ifm = nlmsg_data(nlh); |
1da177e4 | 596 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
597 | goto errout; |
598 | ||
3ccd8624 | 599 | err = -EADDRNOTAVAIL; |
fc766e4c ED |
600 | for (ifap = &dn_db->ifa_list; |
601 | (ifa = rtnl_dereference(*ifap)) != NULL; | |
602 | ifap = &ifa->ifa_next) { | |
4a89c256 TG |
603 | if (tb[IFA_LOCAL] && |
604 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
605 | continue; | |
1da177e4 | 606 | |
4a89c256 | 607 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
608 | continue; |
609 | ||
610 | dn_dev_del_ifa(dn_db, ifap, 1); | |
611 | return 0; | |
612 | } | |
613 | ||
4a89c256 TG |
614 | errout: |
615 | return err; | |
1da177e4 LT |
616 | } |
617 | ||
4a89c256 | 618 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1da177e4 | 619 | { |
3b1e0a65 | 620 | struct net *net = sock_net(skb->sk); |
4a89c256 | 621 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
622 | struct net_device *dev; |
623 | struct dn_dev *dn_db; | |
4a89c256 | 624 | struct ifaddrmsg *ifm; |
1da177e4 | 625 | struct dn_ifaddr *ifa; |
4a89c256 TG |
626 | int err; |
627 | ||
09ad9bc7 | 628 | if (!net_eq(net, &init_net)) |
b854272b DL |
629 | return -EINVAL; |
630 | ||
4a89c256 TG |
631 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
632 | if (err < 0) | |
633 | return err; | |
1da177e4 | 634 | |
4a89c256 | 635 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
636 | return -EINVAL; |
637 | ||
4a89c256 | 638 | ifm = nlmsg_data(nlh); |
881d966b | 639 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4 LT |
640 | return -ENODEV; |
641 | ||
fc766e4c | 642 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
1da177e4 LT |
643 | dn_db = dn_dev_create(dev, &err); |
644 | if (!dn_db) | |
645 | return err; | |
646 | } | |
429eb0fa | 647 | |
1da177e4 LT |
648 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
649 | return -ENOBUFS; | |
650 | ||
4a89c256 TG |
651 | if (tb[IFA_ADDRESS] == NULL) |
652 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
653 | ||
654 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
655 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
1da177e4 LT |
656 | ifa->ifa_flags = ifm->ifa_flags; |
657 | ifa->ifa_scope = ifm->ifa_scope; | |
658 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
659 | |
660 | if (tb[IFA_LABEL]) | |
661 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
662 | else |
663 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
664 | ||
4a89c256 TG |
665 | err = dn_dev_insert_ifa(dn_db, ifa); |
666 | if (err) | |
1da177e4 | 667 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
668 | |
669 | return err; | |
1da177e4 LT |
670 | } |
671 | ||
a6f01cac TG |
672 | static inline size_t dn_ifaddr_nlmsg_size(void) |
673 | { | |
674 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
675 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
676 | + nla_total_size(2) /* IFA_ADDRESS */ | |
677 | + nla_total_size(2); /* IFA_LOCAL */ | |
678 | } | |
679 | ||
4a89c256 TG |
680 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
681 | u32 pid, u32 seq, int event, unsigned int flags) | |
1da177e4 LT |
682 | { |
683 | struct ifaddrmsg *ifm; | |
684 | struct nlmsghdr *nlh; | |
1da177e4 | 685 | |
4a89c256 TG |
686 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
687 | if (nlh == NULL) | |
26932566 | 688 | return -EMSGSIZE; |
1da177e4 | 689 | |
4a89c256 | 690 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
691 | ifm->ifa_family = AF_DECnet; |
692 | ifm->ifa_prefixlen = 16; | |
693 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
694 | ifm->ifa_scope = ifa->ifa_scope; | |
695 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 696 | |
b21dddb9 DM |
697 | if ((ifa->ifa_address && |
698 | nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) || | |
699 | (ifa->ifa_local && | |
700 | nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) || | |
701 | (ifa->ifa_label[0] && | |
702 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label))) | |
703 | goto nla_put_failure; | |
4a89c256 TG |
704 | return nlmsg_end(skb, nlh); |
705 | ||
706 | nla_put_failure: | |
26932566 PM |
707 | nlmsg_cancel(skb, nlh); |
708 | return -EMSGSIZE; | |
1da177e4 LT |
709 | } |
710 | ||
b020b942 | 711 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
712 | { |
713 | struct sk_buff *skb; | |
dc738dd8 | 714 | int err = -ENOBUFS; |
1da177e4 | 715 | |
a6f01cac | 716 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
717 | if (skb == NULL) |
718 | goto errout; | |
719 | ||
4a89c256 | 720 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
721 | if (err < 0) { |
722 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
723 | WARN_ON(err == -EMSGSIZE); | |
724 | kfree_skb(skb); | |
725 | goto errout; | |
726 | } | |
1ce85fe4 PNA |
727 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
728 | return; | |
dc738dd8 TG |
729 | errout: |
730 | if (err < 0) | |
97c53cac | 731 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4 LT |
732 | } |
733 | ||
4a89c256 | 734 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 735 | { |
3b1e0a65 | 736 | struct net *net = sock_net(skb->sk); |
4a89c256 | 737 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
738 | struct net_device *dev; |
739 | struct dn_dev *dn_db; | |
740 | struct dn_ifaddr *ifa; | |
741 | ||
09ad9bc7 | 742 | if (!net_eq(net, &init_net)) |
b854272b DL |
743 | return 0; |
744 | ||
4a89c256 TG |
745 | skip_ndevs = cb->args[0]; |
746 | skip_naddr = cb->args[1]; | |
747 | ||
7562f876 | 748 | idx = 0; |
e67f88dd ED |
749 | rcu_read_lock(); |
750 | for_each_netdev_rcu(&init_net, dev) { | |
4a89c256 | 751 | if (idx < skip_ndevs) |
7562f876 | 752 | goto cont; |
4a89c256 TG |
753 | else if (idx > skip_ndevs) { |
754 | /* Only skip over addresses for first dev dumped | |
755 | * in this iteration (idx == skip_ndevs) */ | |
756 | skip_naddr = 0; | |
757 | } | |
758 | ||
e67f88dd | 759 | if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
7562f876 | 760 | goto cont; |
1da177e4 | 761 | |
e67f88dd ED |
762 | for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; |
763 | ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { | |
4a89c256 | 764 | if (dn_idx < skip_naddr) |
a2221f30 | 765 | continue; |
1da177e4 | 766 | |
4a89c256 TG |
767 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
768 | cb->nlh->nlmsg_seq, RTM_NEWADDR, | |
769 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
770 | goto done; |
771 | } | |
7562f876 PE |
772 | cont: |
773 | idx++; | |
1da177e4 LT |
774 | } |
775 | done: | |
e67f88dd | 776 | rcu_read_unlock(); |
1da177e4 LT |
777 | cb->args[0] = idx; |
778 | cb->args[1] = dn_idx; | |
779 | ||
780 | return skb->len; | |
781 | } | |
782 | ||
c4ea94ab | 783 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 | 784 | { |
fc766e4c | 785 | struct dn_dev *dn_db; |
1da177e4 LT |
786 | struct dn_ifaddr *ifa; |
787 | int rv = -ENODEV; | |
41bdecf1 | 788 | |
fc766e4c ED |
789 | rcu_read_lock(); |
790 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
791 | if (dn_db == NULL) |
792 | goto out; | |
41bdecf1 | 793 | |
fc766e4c | 794 | ifa = rcu_dereference(dn_db->ifa_list); |
1da177e4 LT |
795 | if (ifa != NULL) { |
796 | *addr = ifa->ifa_local; | |
797 | rv = 0; | |
798 | } | |
799 | out: | |
fc766e4c | 800 | rcu_read_unlock(); |
1da177e4 LT |
801 | return rv; |
802 | } | |
803 | ||
429eb0fa | 804 | /* |
1da177e4 LT |
805 | * Find a default address to bind to. |
806 | * | |
807 | * This is one of those areas where the initial VMS concepts don't really | |
808 | * map onto the Linux concepts, and since we introduced multiple addresses | |
809 | * per interface we have to cope with slightly odd ways of finding out what | |
810 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
811 | * a sensible default. Eventually the routing code will take care of all the | |
812 | * nasties for us I hope. | |
813 | */ | |
c4ea94ab | 814 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
815 | { |
816 | struct net_device *dev; | |
817 | int rv; | |
818 | dev = dn_dev_get_default(); | |
819 | last_chance: | |
820 | if (dev) { | |
1da177e4 | 821 | rv = dn_dev_get_first(dev, addr); |
1da177e4 | 822 | dev_put(dev); |
2774c7ab | 823 | if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4 LT |
824 | return rv; |
825 | } | |
2774c7ab | 826 | dev = init_net.loopback_dev; |
1da177e4 LT |
827 | dev_hold(dev); |
828 | goto last_chance; | |
829 | } | |
830 | ||
831 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
832 | { | |
429eb0fa YH |
833 | struct endnode_hello_message *msg; |
834 | struct sk_buff *skb = NULL; | |
835 | __le16 *pktlen; | |
fc766e4c | 836 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 | 837 | |
429eb0fa | 838 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
839 | return; |
840 | ||
429eb0fa | 841 | skb->dev = dev; |
1da177e4 | 842 | |
429eb0fa | 843 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 844 | |
429eb0fa YH |
845 | msg->msgflg = 0x0D; |
846 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 847 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa | 848 | msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa8 | 849 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fa YH |
850 | msg->area = 0x00; |
851 | memset(msg->seed, 0, 8); | |
852 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
853 | |
854 | if (dn_db->router) { | |
855 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
856 | dn_dn2eth(msg->neighbor, dn->addr); | |
857 | } | |
858 | ||
c4106aa8 | 859 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fa YH |
860 | msg->mpd = 0x00; |
861 | msg->datalen = 0x02; | |
862 | memset(msg->data, 0xAA, 2); | |
863 | ||
864 | pktlen = (__le16 *)skb_push(skb,2); | |
c4106aa8 | 865 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 866 | |
c1d2bbe1 | 867 | skb_reset_network_header(skb); |
1da177e4 LT |
868 | |
869 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
870 | } | |
871 | ||
872 | ||
873 | #define DRDELAY (5 * HZ) | |
874 | ||
875 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
876 | { | |
877 | /* First check time since device went up */ | |
878 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
879 | return 0; | |
880 | ||
881 | /* If there is no router, then yes... */ | |
882 | if (!dn_db->router) | |
883 | return 1; | |
884 | ||
885 | /* otherwise only if we have a higher priority or.. */ | |
886 | if (dn->priority < dn_db->parms.priority) | |
887 | return 1; | |
888 | ||
889 | /* if we have equal priority and a higher node number */ | |
890 | if (dn->priority != dn_db->parms.priority) | |
891 | return 0; | |
892 | ||
c4106aa8 | 893 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4 LT |
894 | return 1; |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
900 | { | |
901 | int n; | |
fc766e4c | 902 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
903 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
904 | struct sk_buff *skb; | |
905 | size_t size; | |
906 | unsigned char *ptr; | |
907 | unsigned char *i1, *i2; | |
c4ea94ab | 908 | __le16 *pktlen; |
1da177e4 LT |
909 | char *src; |
910 | ||
911 | if (mtu2blksize(dev) < (26 + 7)) | |
912 | return; | |
913 | ||
914 | n = mtu2blksize(dev) - 26; | |
915 | n /= 7; | |
916 | ||
917 | if (n > 32) | |
918 | n = 32; | |
919 | ||
920 | size = 2 + 26 + 7 * n; | |
921 | ||
922 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
923 | return; | |
924 | ||
925 | skb->dev = dev; | |
926 | ptr = skb_put(skb, size); | |
927 | ||
928 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
929 | *ptr++ = 2; /* ECO */ | |
930 | *ptr++ = 0; | |
931 | *ptr++ = 0; | |
932 | dn_dn2eth(ptr, ifa->ifa_local); | |
933 | src = ptr; | |
934 | ptr += ETH_ALEN; | |
429eb0fa | 935 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 936 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa8 | 937 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4 | 938 | ptr += 2; |
429eb0fa | 939 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 940 | *ptr++ = 0; /* Area: Reserved */ |
c4106aa8 | 941 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
942 | ptr += 2; |
943 | *ptr++ = 0; /* MPD: Reserved */ | |
944 | i1 = ptr++; | |
945 | memset(ptr, 0, 7); /* Name: Reserved */ | |
946 | ptr += 7; | |
947 | i2 = ptr++; | |
948 | ||
949 | n = dn_neigh_elist(dev, ptr, n); | |
950 | ||
951 | *i2 = 7 * n; | |
952 | *i1 = 8 + *i2; | |
953 | ||
954 | skb_trim(skb, (27 + *i2)); | |
955 | ||
c4ea94ab | 956 | pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa8 | 957 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 958 | |
c1d2bbe1 | 959 | skb_reset_network_header(skb); |
1da177e4 LT |
960 | |
961 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
962 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
963 | if (skb2) { | |
964 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
965 | } | |
966 | } | |
967 | ||
968 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
969 | } | |
970 | ||
971 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
972 | { | |
fc766e4c | 973 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
974 | |
975 | if (dn_db->parms.forwarding == 0) | |
976 | dn_send_endnode_hello(dev, ifa); | |
977 | else | |
978 | dn_send_router_hello(dev, ifa); | |
979 | } | |
980 | ||
981 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
982 | { | |
983 | int tdlen = 16; | |
984 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
985 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
986 | int i; | |
987 | unsigned char *ptr; | |
988 | char src[ETH_ALEN]; | |
989 | ||
990 | if (skb == NULL) | |
991 | return ; | |
992 | ||
993 | skb->dev = dev; | |
994 | skb_push(skb, dev->hard_header_len); | |
995 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
996 | ||
997 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 998 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
999 | ptr += 2; |
1000 | *ptr++ = tdlen; | |
1001 | ||
1002 | for(i = 0; i < tdlen; i++) | |
1003 | *ptr++ = 0252; | |
1004 | ||
1005 | dn_dn2eth(src, ifa->ifa_local); | |
1006 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1007 | } | |
1008 | ||
1009 | static int dn_eth_up(struct net_device *dev) | |
1010 | { | |
fc766e4c | 1011 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1012 | |
1013 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1014 | dev_mc_add(dev, dn_rt_all_end_mcast); |
1da177e4 | 1015 | else |
22bedad3 | 1016 | dev_mc_add(dev, dn_rt_all_rt_mcast); |
1da177e4 | 1017 | |
1da177e4 LT |
1018 | dn_db->use_long = 1; |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | static void dn_eth_down(struct net_device *dev) | |
1024 | { | |
fc766e4c | 1025 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1026 | |
1027 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1028 | dev_mc_del(dev, dn_rt_all_end_mcast); |
1da177e4 | 1029 | else |
22bedad3 | 1030 | dev_mc_del(dev, dn_rt_all_rt_mcast); |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | static void dn_dev_set_timer(struct net_device *dev); | |
1034 | ||
1035 | static void dn_dev_timer_func(unsigned long arg) | |
1036 | { | |
1037 | struct net_device *dev = (struct net_device *)arg; | |
fc766e4c | 1038 | struct dn_dev *dn_db; |
1da177e4 LT |
1039 | struct dn_ifaddr *ifa; |
1040 | ||
fc766e4c ED |
1041 | rcu_read_lock(); |
1042 | dn_db = rcu_dereference(dev->dn_ptr); | |
1da177e4 LT |
1043 | if (dn_db->t3 <= dn_db->parms.t2) { |
1044 | if (dn_db->parms.timer3) { | |
fc766e4c ED |
1045 | for (ifa = rcu_dereference(dn_db->ifa_list); |
1046 | ifa; | |
1047 | ifa = rcu_dereference(ifa->ifa_next)) { | |
1da177e4 LT |
1048 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
1049 | dn_db->parms.timer3(dev, ifa); | |
1050 | } | |
1051 | } | |
1052 | dn_db->t3 = dn_db->parms.t3; | |
1053 | } else { | |
1054 | dn_db->t3 -= dn_db->parms.t2; | |
1055 | } | |
fc766e4c | 1056 | rcu_read_unlock(); |
1da177e4 LT |
1057 | dn_dev_set_timer(dev); |
1058 | } | |
1059 | ||
1060 | static void dn_dev_set_timer(struct net_device *dev) | |
1061 | { | |
fc766e4c | 1062 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1063 | |
1064 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1065 | dn_db->parms.t2 = dn_db->parms.t3; | |
1066 | ||
1067 | dn_db->timer.data = (unsigned long)dev; | |
1068 | dn_db->timer.function = dn_dev_timer_func; | |
1069 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1070 | ||
1071 | add_timer(&dn_db->timer); | |
1072 | } | |
1073 | ||
5eaa65b2 | 1074 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4 LT |
1075 | { |
1076 | int i; | |
1077 | struct dn_dev_parms *p = dn_dev_list; | |
1078 | struct dn_dev *dn_db; | |
1079 | ||
1080 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1081 | if (p->type == dev->type) | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | *err = -ENODEV; | |
1086 | if (i == DN_DEV_LIST_SIZE) | |
1087 | return NULL; | |
1088 | ||
1089 | *err = -ENOBUFS; | |
0da974f4 | 1090 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1091 | return NULL; |
1092 | ||
1da177e4 | 1093 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
fc766e4c | 1094 | |
cf778b00 | 1095 | rcu_assign_pointer(dev->dn_ptr, dn_db); |
1da177e4 LT |
1096 | dn_db->dev = dev; |
1097 | init_timer(&dn_db->timer); | |
1098 | ||
1099 | dn_db->uptime = jiffies; | |
95743deb EB |
1100 | |
1101 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1102 | if (!dn_db->neigh_parms) { | |
a9b3cd7f | 1103 | RCU_INIT_POINTER(dev->dn_ptr, NULL); |
95743deb EB |
1104 | kfree(dn_db); |
1105 | return NULL; | |
1106 | } | |
1107 | ||
1da177e4 LT |
1108 | if (dn_db->parms.up) { |
1109 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1110 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1111 | dev->dn_ptr = NULL; |
1112 | kfree(dn_db); | |
1113 | return NULL; | |
1114 | } | |
1115 | } | |
1116 | ||
1da177e4 LT |
1117 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1118 | ||
1119 | dn_dev_set_timer(dev); | |
1120 | ||
1121 | *err = 0; | |
1122 | return dn_db; | |
1123 | } | |
1124 | ||
1125 | ||
1126 | /* | |
1127 | * This processes a device up event. We only start up | |
1128 | * the loopback device & ethernet devices with correct | |
b595076a | 1129 | * MAC addresses automatically. Others must be started |
1da177e4 LT |
1130 | * specifically. |
1131 | * | |
1132 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1133 | * with using decnet_address here and for autobind, it will be one less thing | |
1134 | * for users to worry about setting up. | |
1135 | */ | |
1136 | ||
1137 | void dn_dev_up(struct net_device *dev) | |
1138 | { | |
1139 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1140 | __le16 addr = decnet_address; |
1da177e4 | 1141 | int maybe_default = 0; |
fc766e4c | 1142 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1143 | |
1144 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1145 | return; | |
1146 | ||
1147 | /* | |
1148 | * Need to ensure that loopback device has a dn_db attached to it | |
1149 | * to allow creation of neighbours against it, even though it might | |
1150 | * not have a local address of its own. Might as well do the same for | |
1151 | * all autoconfigured interfaces. | |
1152 | */ | |
1153 | if (dn_db == NULL) { | |
1154 | int err; | |
1155 | dn_db = dn_dev_create(dev, &err); | |
1156 | if (dn_db == NULL) | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | if (dev->type == ARPHRD_ETHER) { | |
1161 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1162 | return; | |
c4ea94ab | 1163 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1164 | maybe_default = 1; |
1165 | } | |
1166 | ||
1167 | if (addr == 0) | |
1168 | return; | |
1169 | ||
1170 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1171 | return; | |
1172 | ||
1173 | ifa->ifa_local = ifa->ifa_address = addr; | |
1174 | ifa->ifa_flags = 0; | |
1175 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1176 | strcpy(ifa->ifa_label, dev->name); | |
1177 | ||
1178 | dn_dev_set_ifa(dev, ifa); | |
1179 | ||
1180 | /* | |
1181 | * Automagically set the default device to the first automatically | |
1182 | * configured ethernet card in the system. | |
1183 | */ | |
1184 | if (maybe_default) { | |
1185 | dev_hold(dev); | |
1186 | if (dn_dev_set_default(dev, 0)) | |
1187 | dev_put(dev); | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | static void dn_dev_delete(struct net_device *dev) | |
1192 | { | |
fc766e4c | 1193 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1194 | |
1195 | if (dn_db == NULL) | |
1196 | return; | |
1197 | ||
1198 | del_timer_sync(&dn_db->timer); | |
1199 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1200 | dn_dev_check_default(dev); | |
1201 | neigh_ifdown(&dn_neigh_table, dev); | |
1202 | ||
1203 | if (dn_db->parms.down) | |
1204 | dn_db->parms.down(dev); | |
1205 | ||
1206 | dev->dn_ptr = NULL; | |
1207 | ||
1208 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1209 | neigh_ifdown(&dn_neigh_table, dev); | |
1210 | ||
1211 | if (dn_db->router) | |
1212 | neigh_release(dn_db->router); | |
1213 | if (dn_db->peer) | |
1214 | neigh_release(dn_db->peer); | |
1215 | ||
1216 | kfree(dn_db); | |
1217 | } | |
1218 | ||
1219 | void dn_dev_down(struct net_device *dev) | |
1220 | { | |
fc766e4c | 1221 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4 LT |
1222 | struct dn_ifaddr *ifa; |
1223 | ||
1224 | if (dn_db == NULL) | |
1225 | return; | |
1226 | ||
fc766e4c | 1227 | while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
1da177e4 LT |
1228 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
1229 | dn_dev_free_ifa(ifa); | |
1230 | } | |
1231 | ||
1232 | dn_dev_delete(dev); | |
1233 | } | |
1234 | ||
1235 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1236 | { | |
1da177e4 LT |
1237 | } |
1238 | ||
1239 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1240 | { | |
1da177e4 LT |
1241 | } |
1242 | ||
1243 | void dn_dev_hello(struct sk_buff *skb) | |
1244 | { | |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | void dn_dev_devices_off(void) | |
1248 | { | |
1249 | struct net_device *dev; | |
1250 | ||
1251 | rtnl_lock(); | |
881d966b | 1252 | for_each_netdev(&init_net, dev) |
1da177e4 LT |
1253 | dn_dev_down(dev); |
1254 | rtnl_unlock(); | |
1255 | ||
1256 | } | |
1257 | ||
1258 | void dn_dev_devices_on(void) | |
1259 | { | |
1260 | struct net_device *dev; | |
1261 | ||
1262 | rtnl_lock(); | |
881d966b | 1263 | for_each_netdev(&init_net, dev) { |
1da177e4 LT |
1264 | if (dev->flags & IFF_UP) |
1265 | dn_dev_up(dev); | |
1266 | } | |
1267 | rtnl_unlock(); | |
1268 | } | |
1269 | ||
1270 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1271 | { | |
e041c683 | 1272 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1276 | { | |
e041c683 | 1277 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1278 | } |
1279 | ||
1280 | #ifdef CONFIG_PROC_FS | |
7562f876 | 1281 | static inline int is_dn_dev(struct net_device *dev) |
1da177e4 | 1282 | { |
7562f876 | 1283 | return dev->dn_ptr != NULL; |
1da177e4 LT |
1284 | } |
1285 | ||
7562f876 | 1286 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
fc766e4c | 1287 | __acquires(RCU) |
1da177e4 | 1288 | { |
7562f876 | 1289 | int i; |
1da177e4 LT |
1290 | struct net_device *dev; |
1291 | ||
fa918602 | 1292 | rcu_read_lock(); |
1da177e4 | 1293 | |
7562f876 PE |
1294 | if (*pos == 0) |
1295 | return SEQ_START_TOKEN; | |
1296 | ||
1297 | i = 1; | |
fa918602 | 1298 | for_each_netdev_rcu(&init_net, dev) { |
7562f876 PE |
1299 | if (!is_dn_dev(dev)) |
1300 | continue; | |
1301 | ||
1302 | if (i++ == *pos) | |
1303 | return dev; | |
1da177e4 | 1304 | } |
7562f876 PE |
1305 | |
1306 | return NULL; | |
1da177e4 LT |
1307 | } |
1308 | ||
1309 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1310 | { | |
7562f876 | 1311 | struct net_device *dev; |
1da177e4 | 1312 | |
1da177e4 | 1313 | ++*pos; |
7562f876 | 1314 | |
ea110733 | 1315 | dev = v; |
7562f876 | 1316 | if (v == SEQ_START_TOKEN) |
881d966b | 1317 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 1318 | |
fa918602 | 1319 | for_each_netdev_continue_rcu(&init_net, dev) { |
7562f876 PE |
1320 | if (!is_dn_dev(dev)) |
1321 | continue; | |
1322 | ||
1323 | return dev; | |
1324 | } | |
1325 | ||
1326 | return NULL; | |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
fc766e4c | 1330 | __releases(RCU) |
1da177e4 | 1331 | { |
fa918602 | 1332 | rcu_read_unlock(); |
1da177e4 LT |
1333 | } |
1334 | ||
1335 | static char *dn_type2asc(char type) | |
1336 | { | |
06f8fe11 JP |
1337 | switch (type) { |
1338 | case DN_DEV_BCAST: | |
1339 | return "B"; | |
1340 | case DN_DEV_UCAST: | |
1341 | return "U"; | |
1342 | case DN_DEV_MPOINT: | |
1343 | return "M"; | |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | return "?"; | |
1347 | } | |
1348 | ||
1349 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1350 | { | |
1351 | if (v == SEQ_START_TOKEN) | |
429eb0fa | 1352 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1353 | else { |
1354 | struct net_device *dev = v; | |
1355 | char peer_buf[DN_ASCBUF_LEN]; | |
1356 | char router_buf[DN_ASCBUF_LEN]; | |
fc766e4c | 1357 | struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4 | 1358 | |
429eb0fa | 1359 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1360 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1361 | dev->name ? dev->name : "???", |
1362 | dn_type2asc(dn_db->parms.mode), | |
1363 | 0, 0, | |
1da177e4 LT |
1364 | dn_db->t3, dn_db->parms.t3, |
1365 | mtu2blksize(dev), | |
1366 | dn_db->parms.priority, | |
1367 | dn_db->parms.state, dn_db->parms.name, | |
c4106aa8 HH |
1368 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1369 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1370 | } |
1371 | return 0; | |
1372 | } | |
1373 | ||
56b3d975 | 1374 | static const struct seq_operations dn_dev_seq_ops = { |
1da177e4 LT |
1375 | .start = dn_dev_seq_start, |
1376 | .next = dn_dev_seq_next, | |
1377 | .stop = dn_dev_seq_stop, | |
1378 | .show = dn_dev_seq_show, | |
1379 | }; | |
1380 | ||
1381 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1382 | { | |
1383 | return seq_open(file, &dn_dev_seq_ops); | |
1384 | } | |
1385 | ||
9a32144e | 1386 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
1387 | .owner = THIS_MODULE, |
1388 | .open = dn_dev_seq_open, | |
1389 | .read = seq_read, | |
1390 | .llseek = seq_lseek, | |
1391 | .release = seq_release, | |
1392 | }; | |
1393 | ||
1394 | #endif /* CONFIG_PROC_FS */ | |
1395 | ||
4e058063 | 1396 | static int addr[2]; |
1da177e4 LT |
1397 | module_param_array(addr, int, NULL, 0444); |
1398 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1399 | ||
1400 | void __init dn_dev_init(void) | |
1401 | { | |
429eb0fa YH |
1402 | if (addr[0] > 63 || addr[0] < 0) { |
1403 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1404 | return; | |
1405 | } | |
1da177e4 | 1406 | |
429eb0fa YH |
1407 | if (addr[1] > 1023 || addr[1] < 0) { |
1408 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1409 | return; | |
1410 | } | |
1da177e4 | 1411 | |
c4106aa8 | 1412 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1413 | |
1414 | dn_dev_devices_on(); | |
1415 | ||
c7ac8679 GR |
1416 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL); |
1417 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL); | |
1418 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL); | |
1da177e4 | 1419 | |
457c4cbc | 1420 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
1da177e4 LT |
1421 | |
1422 | #ifdef CONFIG_SYSCTL | |
1423 | { | |
1424 | int i; | |
1425 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1426 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); | |
1427 | } | |
1428 | #endif /* CONFIG_SYSCTL */ | |
1429 | } | |
1430 | ||
1431 | void __exit dn_dev_cleanup(void) | |
1432 | { | |
1da177e4 LT |
1433 | #ifdef CONFIG_SYSCTL |
1434 | { | |
1435 | int i; | |
1436 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1437 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1438 | } | |
1439 | #endif /* CONFIG_SYSCTL */ | |
1440 | ||
457c4cbc | 1441 | proc_net_remove(&init_net, "decnet_dev"); |
1da177e4 LT |
1442 | |
1443 | dn_dev_devices_off(); | |
1444 | } |