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 | ||
270 | dn_db = dev->dn_ptr; | |
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 | ||
335 | static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa) | |
336 | { | |
337 | kfree(ifa); | |
338 | } | |
339 | ||
340 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy) | |
341 | { | |
342 | struct dn_ifaddr *ifa1 = *ifap; | |
343 | unsigned char mac_addr[6]; | |
344 | struct net_device *dev = dn_db->dev; | |
345 | ||
346 | ASSERT_RTNL(); | |
347 | ||
348 | *ifap = ifa1->ifa_next; | |
349 | ||
350 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
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 */ |
1da177e4 LT |
376 | for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { |
377 | if (ifa1->ifa_local == ifa->ifa_local) | |
378 | return -EEXIST; | |
379 | } | |
380 | ||
381 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 382 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 | 383 | dn_dn2eth(mac_addr, ifa->ifa_local); |
22bedad3 | 384 | dev_mc_add(dev, mac_addr); |
1da177e4 LT |
385 | } |
386 | } | |
387 | ||
388 | ifa->ifa_next = dn_db->ifa_list; | |
389 | dn_db->ifa_list = ifa; | |
390 | ||
b020b942 | 391 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
e041c683 | 392 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
393 | |
394 | return 0; | |
395 | } | |
396 | ||
397 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
398 | { | |
399 | struct dn_dev *dn_db = dev->dn_ptr; | |
400 | int rv; | |
401 | ||
402 | if (dn_db == NULL) { | |
403 | int err; | |
404 | dn_db = dn_dev_create(dev, &err); | |
405 | if (dn_db == NULL) | |
406 | return err; | |
407 | } | |
408 | ||
409 | ifa->ifa_dev = dn_db; | |
410 | ||
411 | if (dev->flags & IFF_LOOPBACK) | |
412 | ifa->ifa_scope = RT_SCOPE_HOST; | |
413 | ||
414 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
415 | if (rv) | |
416 | dn_dev_free_ifa(ifa); | |
417 | return rv; | |
418 | } | |
419 | ||
420 | ||
421 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
422 | { | |
423 | char buffer[DN_IFREQ_SIZE]; | |
424 | struct ifreq *ifr = (struct ifreq *)buffer; | |
425 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
426 | struct dn_dev *dn_db; | |
427 | struct net_device *dev; | |
428 | struct dn_ifaddr *ifa = NULL, **ifap = NULL; | |
429 | int ret = 0; | |
430 | ||
431 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
432 | return -EFAULT; | |
433 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
434 | ||
881d966b | 435 | dev_load(&init_net, ifr->ifr_name); |
1da177e4 LT |
436 | |
437 | switch(cmd) { | |
438 | case SIOCGIFADDR: | |
439 | break; | |
440 | case SIOCSIFADDR: | |
441 | if (!capable(CAP_NET_ADMIN)) | |
442 | return -EACCES; | |
443 | if (sdn->sdn_family != AF_DECnet) | |
444 | return -EINVAL; | |
445 | break; | |
446 | default: | |
447 | return -EINVAL; | |
448 | } | |
449 | ||
450 | rtnl_lock(); | |
451 | ||
881d966b | 452 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
1da177e4 LT |
453 | ret = -ENODEV; |
454 | goto done; | |
455 | } | |
456 | ||
457 | if ((dn_db = dev->dn_ptr) != NULL) { | |
458 | for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) | |
459 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) | |
460 | break; | |
461 | } | |
462 | ||
463 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
464 | ret = -EADDRNOTAVAIL; | |
465 | goto done; | |
466 | } | |
467 | ||
468 | switch(cmd) { | |
469 | case SIOCGIFADDR: | |
c4ea94ab | 470 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
1da177e4 LT |
471 | goto rarok; |
472 | ||
473 | case SIOCSIFADDR: | |
474 | if (!ifa) { | |
475 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
476 | ret = -ENOBUFS; | |
477 | break; | |
478 | } | |
479 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
480 | } else { | |
481 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
482 | break; | |
483 | dn_dev_del_ifa(dn_db, ifap, 0); | |
484 | } | |
485 | ||
486 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); | |
487 | ||
488 | ret = dn_dev_set_ifa(dev, ifa); | |
489 | } | |
490 | done: | |
491 | rtnl_unlock(); | |
492 | ||
493 | return ret; | |
494 | rarok: | |
495 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
496 | ret = -EFAULT; | |
497 | goto done; | |
498 | } | |
499 | ||
500 | struct net_device *dn_dev_get_default(void) | |
501 | { | |
502 | struct net_device *dev; | |
e5c140a3 | 503 | |
504 | spin_lock(&dndev_lock); | |
1da177e4 LT |
505 | dev = decnet_default_device; |
506 | if (dev) { | |
507 | if (dev->dn_ptr) | |
508 | dev_hold(dev); | |
509 | else | |
510 | dev = NULL; | |
511 | } | |
e5c140a3 | 512 | spin_unlock(&dndev_lock); |
513 | ||
1da177e4 LT |
514 | return dev; |
515 | } | |
516 | ||
517 | int dn_dev_set_default(struct net_device *dev, int force) | |
518 | { | |
519 | struct net_device *old = NULL; | |
520 | int rv = -EBUSY; | |
521 | if (!dev->dn_ptr) | |
522 | return -ENODEV; | |
e5c140a3 | 523 | |
524 | spin_lock(&dndev_lock); | |
1da177e4 LT |
525 | if (force || decnet_default_device == NULL) { |
526 | old = decnet_default_device; | |
527 | decnet_default_device = dev; | |
528 | rv = 0; | |
529 | } | |
e5c140a3 | 530 | spin_unlock(&dndev_lock); |
531 | ||
1da177e4 | 532 | if (old) |
6a57b2ee | 533 | dev_put(old); |
1da177e4 LT |
534 | return rv; |
535 | } | |
536 | ||
537 | static void dn_dev_check_default(struct net_device *dev) | |
538 | { | |
e5c140a3 | 539 | spin_lock(&dndev_lock); |
1da177e4 LT |
540 | if (dev == decnet_default_device) { |
541 | decnet_default_device = NULL; | |
542 | } else { | |
543 | dev = NULL; | |
544 | } | |
e5c140a3 | 545 | spin_unlock(&dndev_lock); |
546 | ||
1da177e4 LT |
547 | if (dev) |
548 | dev_put(dev); | |
549 | } | |
550 | ||
b4d745db ED |
551 | /* |
552 | * Called with RTNL | |
553 | */ | |
1da177e4 LT |
554 | static struct dn_dev *dn_dev_by_index(int ifindex) |
555 | { | |
556 | struct net_device *dev; | |
557 | struct dn_dev *dn_dev = NULL; | |
b4d745db ED |
558 | |
559 | dev = __dev_get_by_index(&init_net, ifindex); | |
560 | if (dev) | |
1da177e4 | 561 | dn_dev = dev->dn_ptr; |
1da177e4 LT |
562 | |
563 | return dn_dev; | |
564 | } | |
565 | ||
ef7c79ed | 566 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
4a89c256 TG |
567 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
568 | [IFA_LOCAL] = { .type = NLA_U16 }, | |
569 | [IFA_LABEL] = { .type = NLA_STRING, | |
570 | .len = IFNAMSIZ - 1 }, | |
571 | }; | |
572 | ||
573 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 574 | { |
3b1e0a65 | 575 | struct net *net = sock_net(skb->sk); |
4a89c256 | 576 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 577 | struct dn_dev *dn_db; |
4a89c256 | 578 | struct ifaddrmsg *ifm; |
1da177e4 | 579 | struct dn_ifaddr *ifa, **ifap; |
b854272b DL |
580 | int err = -EINVAL; |
581 | ||
09ad9bc7 | 582 | if (!net_eq(net, &init_net)) |
b854272b | 583 | goto errout; |
4a89c256 TG |
584 | |
585 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); | |
586 | if (err < 0) | |
587 | goto errout; | |
1da177e4 | 588 | |
3ccd8624 | 589 | err = -ENODEV; |
4a89c256 | 590 | ifm = nlmsg_data(nlh); |
1da177e4 | 591 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c256 TG |
592 | goto errout; |
593 | ||
3ccd8624 | 594 | err = -EADDRNOTAVAIL; |
4a89c256 TG |
595 | for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) { |
596 | if (tb[IFA_LOCAL] && | |
597 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) | |
598 | continue; | |
1da177e4 | 599 | |
4a89c256 | 600 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4 LT |
601 | continue; |
602 | ||
603 | dn_dev_del_ifa(dn_db, ifap, 1); | |
604 | return 0; | |
605 | } | |
606 | ||
4a89c256 TG |
607 | errout: |
608 | return err; | |
1da177e4 LT |
609 | } |
610 | ||
4a89c256 | 611 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1da177e4 | 612 | { |
3b1e0a65 | 613 | struct net *net = sock_net(skb->sk); |
4a89c256 | 614 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 LT |
615 | struct net_device *dev; |
616 | struct dn_dev *dn_db; | |
4a89c256 | 617 | struct ifaddrmsg *ifm; |
1da177e4 | 618 | struct dn_ifaddr *ifa; |
4a89c256 TG |
619 | int err; |
620 | ||
09ad9bc7 | 621 | if (!net_eq(net, &init_net)) |
b854272b DL |
622 | return -EINVAL; |
623 | ||
4a89c256 TG |
624 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
625 | if (err < 0) | |
626 | return err; | |
1da177e4 | 627 | |
4a89c256 | 628 | if (tb[IFA_LOCAL] == NULL) |
1da177e4 LT |
629 | return -EINVAL; |
630 | ||
4a89c256 | 631 | ifm = nlmsg_data(nlh); |
881d966b | 632 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4 LT |
633 | return -ENODEV; |
634 | ||
635 | if ((dn_db = dev->dn_ptr) == NULL) { | |
1da177e4 LT |
636 | dn_db = dn_dev_create(dev, &err); |
637 | if (!dn_db) | |
638 | return err; | |
639 | } | |
429eb0fa | 640 | |
1da177e4 LT |
641 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
642 | return -ENOBUFS; | |
643 | ||
4a89c256 TG |
644 | if (tb[IFA_ADDRESS] == NULL) |
645 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
646 | ||
647 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); | |
648 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); | |
1da177e4 LT |
649 | ifa->ifa_flags = ifm->ifa_flags; |
650 | ifa->ifa_scope = ifm->ifa_scope; | |
651 | ifa->ifa_dev = dn_db; | |
4a89c256 TG |
652 | |
653 | if (tb[IFA_LABEL]) | |
654 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
655 | else |
656 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
657 | ||
4a89c256 TG |
658 | err = dn_dev_insert_ifa(dn_db, ifa); |
659 | if (err) | |
1da177e4 | 660 | dn_dev_free_ifa(ifa); |
4a89c256 TG |
661 | |
662 | return err; | |
1da177e4 LT |
663 | } |
664 | ||
a6f01cac TG |
665 | static inline size_t dn_ifaddr_nlmsg_size(void) |
666 | { | |
667 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
668 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
669 | + nla_total_size(2) /* IFA_ADDRESS */ | |
670 | + nla_total_size(2); /* IFA_LOCAL */ | |
671 | } | |
672 | ||
4a89c256 TG |
673 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
674 | u32 pid, u32 seq, int event, unsigned int flags) | |
1da177e4 LT |
675 | { |
676 | struct ifaddrmsg *ifm; | |
677 | struct nlmsghdr *nlh; | |
1da177e4 | 678 | |
4a89c256 TG |
679 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
680 | if (nlh == NULL) | |
26932566 | 681 | return -EMSGSIZE; |
1da177e4 | 682 | |
4a89c256 | 683 | ifm = nlmsg_data(nlh); |
1da177e4 LT |
684 | ifm->ifa_family = AF_DECnet; |
685 | ifm->ifa_prefixlen = 16; | |
686 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
687 | ifm->ifa_scope = ifa->ifa_scope; | |
688 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
4a89c256 | 689 | |
1da177e4 | 690 | if (ifa->ifa_address) |
4a89c256 | 691 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
1da177e4 | 692 | if (ifa->ifa_local) |
4a89c256 | 693 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
1da177e4 | 694 | if (ifa->ifa_label[0]) |
4a89c256 | 695 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
1da177e4 | 696 | |
4a89c256 TG |
697 | return nlmsg_end(skb, nlh); |
698 | ||
699 | nla_put_failure: | |
26932566 PM |
700 | nlmsg_cancel(skb, nlh); |
701 | return -EMSGSIZE; | |
1da177e4 LT |
702 | } |
703 | ||
b020b942 | 704 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4 LT |
705 | { |
706 | struct sk_buff *skb; | |
dc738dd8 | 707 | int err = -ENOBUFS; |
1da177e4 | 708 | |
a6f01cac | 709 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
710 | if (skb == NULL) |
711 | goto errout; | |
712 | ||
4a89c256 | 713 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566 PM |
714 | if (err < 0) { |
715 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ | |
716 | WARN_ON(err == -EMSGSIZE); | |
717 | kfree_skb(skb); | |
718 | goto errout; | |
719 | } | |
1ce85fe4 PNA |
720 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
721 | return; | |
dc738dd8 TG |
722 | errout: |
723 | if (err < 0) | |
97c53cac | 724 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4 LT |
725 | } |
726 | ||
4a89c256 | 727 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 728 | { |
3b1e0a65 | 729 | struct net *net = sock_net(skb->sk); |
4a89c256 | 730 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4 LT |
731 | struct net_device *dev; |
732 | struct dn_dev *dn_db; | |
733 | struct dn_ifaddr *ifa; | |
734 | ||
09ad9bc7 | 735 | if (!net_eq(net, &init_net)) |
b854272b DL |
736 | return 0; |
737 | ||
4a89c256 TG |
738 | skip_ndevs = cb->args[0]; |
739 | skip_naddr = cb->args[1]; | |
740 | ||
7562f876 | 741 | idx = 0; |
881d966b | 742 | for_each_netdev(&init_net, dev) { |
4a89c256 | 743 | if (idx < skip_ndevs) |
7562f876 | 744 | goto cont; |
4a89c256 TG |
745 | else if (idx > skip_ndevs) { |
746 | /* Only skip over addresses for first dev dumped | |
747 | * in this iteration (idx == skip_ndevs) */ | |
748 | skip_naddr = 0; | |
749 | } | |
750 | ||
1da177e4 | 751 | if ((dn_db = dev->dn_ptr) == NULL) |
7562f876 | 752 | goto cont; |
1da177e4 | 753 | |
4a89c256 TG |
754 | for (ifa = dn_db->ifa_list, dn_idx = 0; ifa; |
755 | ifa = ifa->ifa_next, dn_idx++) { | |
756 | if (dn_idx < skip_naddr) | |
a2221f30 | 757 | continue; |
1da177e4 | 758 | |
4a89c256 TG |
759 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
760 | cb->nlh->nlmsg_seq, RTM_NEWADDR, | |
761 | NLM_F_MULTI) < 0) | |
1da177e4 LT |
762 | goto done; |
763 | } | |
7562f876 PE |
764 | cont: |
765 | idx++; | |
1da177e4 LT |
766 | } |
767 | done: | |
1da177e4 LT |
768 | cb->args[0] = idx; |
769 | cb->args[1] = dn_idx; | |
770 | ||
771 | return skb->len; | |
772 | } | |
773 | ||
c4ea94ab | 774 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 LT |
775 | { |
776 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
777 | struct dn_ifaddr *ifa; | |
778 | int rv = -ENODEV; | |
41bdecf1 | 779 | |
1da177e4 LT |
780 | if (dn_db == NULL) |
781 | goto out; | |
41bdecf1 | 782 | |
783 | rtnl_lock(); | |
1da177e4 LT |
784 | ifa = dn_db->ifa_list; |
785 | if (ifa != NULL) { | |
786 | *addr = ifa->ifa_local; | |
787 | rv = 0; | |
788 | } | |
41bdecf1 | 789 | rtnl_unlock(); |
1da177e4 LT |
790 | out: |
791 | return rv; | |
792 | } | |
793 | ||
429eb0fa | 794 | /* |
1da177e4 LT |
795 | * Find a default address to bind to. |
796 | * | |
797 | * This is one of those areas where the initial VMS concepts don't really | |
798 | * map onto the Linux concepts, and since we introduced multiple addresses | |
799 | * per interface we have to cope with slightly odd ways of finding out what | |
800 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
801 | * a sensible default. Eventually the routing code will take care of all the | |
802 | * nasties for us I hope. | |
803 | */ | |
c4ea94ab | 804 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
805 | { |
806 | struct net_device *dev; | |
807 | int rv; | |
808 | dev = dn_dev_get_default(); | |
809 | last_chance: | |
810 | if (dev) { | |
1da177e4 | 811 | rv = dn_dev_get_first(dev, addr); |
1da177e4 | 812 | dev_put(dev); |
2774c7ab | 813 | if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4 LT |
814 | return rv; |
815 | } | |
2774c7ab | 816 | dev = init_net.loopback_dev; |
1da177e4 LT |
817 | dev_hold(dev); |
818 | goto last_chance; | |
819 | } | |
820 | ||
821 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
822 | { | |
429eb0fa YH |
823 | struct endnode_hello_message *msg; |
824 | struct sk_buff *skb = NULL; | |
825 | __le16 *pktlen; | |
1da177e4 LT |
826 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
827 | ||
429eb0fa | 828 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
829 | return; |
830 | ||
429eb0fa | 831 | skb->dev = dev; |
1da177e4 | 832 | |
429eb0fa | 833 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4 | 834 | |
429eb0fa YH |
835 | msg->msgflg = 0x0D; |
836 | memcpy(msg->tiver, dn_eco_version, 3); | |
1da177e4 | 837 | dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fa | 838 | msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa8 | 839 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fa YH |
840 | msg->area = 0x00; |
841 | memset(msg->seed, 0, 8); | |
842 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
1da177e4 LT |
843 | |
844 | if (dn_db->router) { | |
845 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
846 | dn_dn2eth(msg->neighbor, dn->addr); | |
847 | } | |
848 | ||
c4106aa8 | 849 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fa YH |
850 | msg->mpd = 0x00; |
851 | msg->datalen = 0x02; | |
852 | memset(msg->data, 0xAA, 2); | |
853 | ||
854 | pktlen = (__le16 *)skb_push(skb,2); | |
c4106aa8 | 855 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 856 | |
c1d2bbe1 | 857 | skb_reset_network_header(skb); |
1da177e4 LT |
858 | |
859 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
860 | } | |
861 | ||
862 | ||
863 | #define DRDELAY (5 * HZ) | |
864 | ||
865 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
866 | { | |
867 | /* First check time since device went up */ | |
868 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
869 | return 0; | |
870 | ||
871 | /* If there is no router, then yes... */ | |
872 | if (!dn_db->router) | |
873 | return 1; | |
874 | ||
875 | /* otherwise only if we have a higher priority or.. */ | |
876 | if (dn->priority < dn_db->parms.priority) | |
877 | return 1; | |
878 | ||
879 | /* if we have equal priority and a higher node number */ | |
880 | if (dn->priority != dn_db->parms.priority) | |
881 | return 0; | |
882 | ||
c4106aa8 | 883 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4 LT |
884 | return 1; |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
889 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
890 | { | |
891 | int n; | |
892 | struct dn_dev *dn_db = dev->dn_ptr; | |
893 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
894 | struct sk_buff *skb; | |
895 | size_t size; | |
896 | unsigned char *ptr; | |
897 | unsigned char *i1, *i2; | |
c4ea94ab | 898 | __le16 *pktlen; |
1da177e4 LT |
899 | char *src; |
900 | ||
901 | if (mtu2blksize(dev) < (26 + 7)) | |
902 | return; | |
903 | ||
904 | n = mtu2blksize(dev) - 26; | |
905 | n /= 7; | |
906 | ||
907 | if (n > 32) | |
908 | n = 32; | |
909 | ||
910 | size = 2 + 26 + 7 * n; | |
911 | ||
912 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
913 | return; | |
914 | ||
915 | skb->dev = dev; | |
916 | ptr = skb_put(skb, size); | |
917 | ||
918 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
919 | *ptr++ = 2; /* ECO */ | |
920 | *ptr++ = 0; | |
921 | *ptr++ = 0; | |
922 | dn_dn2eth(ptr, ifa->ifa_local); | |
923 | src = ptr; | |
924 | ptr += ETH_ALEN; | |
429eb0fa | 925 | *ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4 | 926 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa8 | 927 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4 | 928 | ptr += 2; |
429eb0fa | 929 | *ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4 | 930 | *ptr++ = 0; /* Area: Reserved */ |
c4106aa8 | 931 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
932 | ptr += 2; |
933 | *ptr++ = 0; /* MPD: Reserved */ | |
934 | i1 = ptr++; | |
935 | memset(ptr, 0, 7); /* Name: Reserved */ | |
936 | ptr += 7; | |
937 | i2 = ptr++; | |
938 | ||
939 | n = dn_neigh_elist(dev, ptr, n); | |
940 | ||
941 | *i2 = 7 * n; | |
942 | *i1 = 8 + *i2; | |
943 | ||
944 | skb_trim(skb, (27 + *i2)); | |
945 | ||
c4ea94ab | 946 | pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa8 | 947 | *pktlen = cpu_to_le16(skb->len - 2); |
1da177e4 | 948 | |
c1d2bbe1 | 949 | skb_reset_network_header(skb); |
1da177e4 LT |
950 | |
951 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
952 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
953 | if (skb2) { | |
954 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
955 | } | |
956 | } | |
957 | ||
958 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
959 | } | |
960 | ||
961 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
962 | { | |
963 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
964 | ||
965 | if (dn_db->parms.forwarding == 0) | |
966 | dn_send_endnode_hello(dev, ifa); | |
967 | else | |
968 | dn_send_router_hello(dev, ifa); | |
969 | } | |
970 | ||
971 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
972 | { | |
973 | int tdlen = 16; | |
974 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
975 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
976 | int i; | |
977 | unsigned char *ptr; | |
978 | char src[ETH_ALEN]; | |
979 | ||
980 | if (skb == NULL) | |
981 | return ; | |
982 | ||
983 | skb->dev = dev; | |
984 | skb_push(skb, dev->hard_header_len); | |
985 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
986 | ||
987 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 988 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
989 | ptr += 2; |
990 | *ptr++ = tdlen; | |
991 | ||
992 | for(i = 0; i < tdlen; i++) | |
993 | *ptr++ = 0252; | |
994 | ||
995 | dn_dn2eth(src, ifa->ifa_local); | |
996 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
997 | } | |
998 | ||
999 | static int dn_eth_up(struct net_device *dev) | |
1000 | { | |
1001 | struct dn_dev *dn_db = dev->dn_ptr; | |
1002 | ||
1003 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1004 | dev_mc_add(dev, dn_rt_all_end_mcast); |
1da177e4 | 1005 | else |
22bedad3 | 1006 | dev_mc_add(dev, dn_rt_all_rt_mcast); |
1da177e4 | 1007 | |
1da177e4 LT |
1008 | dn_db->use_long = 1; |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | static void dn_eth_down(struct net_device *dev) | |
1014 | { | |
1015 | struct dn_dev *dn_db = dev->dn_ptr; | |
1016 | ||
1017 | if (dn_db->parms.forwarding == 0) | |
22bedad3 | 1018 | dev_mc_del(dev, dn_rt_all_end_mcast); |
1da177e4 | 1019 | else |
22bedad3 | 1020 | dev_mc_del(dev, dn_rt_all_rt_mcast); |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | static void dn_dev_set_timer(struct net_device *dev); | |
1024 | ||
1025 | static void dn_dev_timer_func(unsigned long arg) | |
1026 | { | |
1027 | struct net_device *dev = (struct net_device *)arg; | |
1028 | struct dn_dev *dn_db = dev->dn_ptr; | |
1029 | struct dn_ifaddr *ifa; | |
1030 | ||
1031 | if (dn_db->t3 <= dn_db->parms.t2) { | |
1032 | if (dn_db->parms.timer3) { | |
1033 | for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1034 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) | |
1035 | dn_db->parms.timer3(dev, ifa); | |
1036 | } | |
1037 | } | |
1038 | dn_db->t3 = dn_db->parms.t3; | |
1039 | } else { | |
1040 | dn_db->t3 -= dn_db->parms.t2; | |
1041 | } | |
1042 | ||
1043 | dn_dev_set_timer(dev); | |
1044 | } | |
1045 | ||
1046 | static void dn_dev_set_timer(struct net_device *dev) | |
1047 | { | |
1048 | struct dn_dev *dn_db = dev->dn_ptr; | |
1049 | ||
1050 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1051 | dn_db->parms.t2 = dn_db->parms.t3; | |
1052 | ||
1053 | dn_db->timer.data = (unsigned long)dev; | |
1054 | dn_db->timer.function = dn_dev_timer_func; | |
1055 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1056 | ||
1057 | add_timer(&dn_db->timer); | |
1058 | } | |
1059 | ||
5eaa65b2 | 1060 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4 LT |
1061 | { |
1062 | int i; | |
1063 | struct dn_dev_parms *p = dn_dev_list; | |
1064 | struct dn_dev *dn_db; | |
1065 | ||
1066 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1067 | if (p->type == dev->type) | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | *err = -ENODEV; | |
1072 | if (i == DN_DEV_LIST_SIZE) | |
1073 | return NULL; | |
1074 | ||
1075 | *err = -ENOBUFS; | |
0da974f4 | 1076 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1077 | return NULL; |
1078 | ||
1da177e4 LT |
1079 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
1080 | smp_wmb(); | |
1081 | dev->dn_ptr = dn_db; | |
1082 | dn_db->dev = dev; | |
1083 | init_timer(&dn_db->timer); | |
1084 | ||
1085 | dn_db->uptime = jiffies; | |
95743deb EB |
1086 | |
1087 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1088 | if (!dn_db->neigh_parms) { | |
1089 | dev->dn_ptr = NULL; | |
1090 | kfree(dn_db); | |
1091 | return NULL; | |
1092 | } | |
1093 | ||
1da177e4 LT |
1094 | if (dn_db->parms.up) { |
1095 | if (dn_db->parms.up(dev) < 0) { | |
95743deb | 1096 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4 LT |
1097 | dev->dn_ptr = NULL; |
1098 | kfree(dn_db); | |
1099 | return NULL; | |
1100 | } | |
1101 | } | |
1102 | ||
1da177e4 LT |
1103 | dn_dev_sysctl_register(dev, &dn_db->parms); |
1104 | ||
1105 | dn_dev_set_timer(dev); | |
1106 | ||
1107 | *err = 0; | |
1108 | return dn_db; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | /* | |
1113 | * This processes a device up event. We only start up | |
1114 | * the loopback device & ethernet devices with correct | |
1115 | * MAC addreses automatically. Others must be started | |
1116 | * specifically. | |
1117 | * | |
1118 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1119 | * with using decnet_address here and for autobind, it will be one less thing | |
1120 | * for users to worry about setting up. | |
1121 | */ | |
1122 | ||
1123 | void dn_dev_up(struct net_device *dev) | |
1124 | { | |
1125 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1126 | __le16 addr = decnet_address; |
1da177e4 LT |
1127 | int maybe_default = 0; |
1128 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
1129 | ||
1130 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1131 | return; | |
1132 | ||
1133 | /* | |
1134 | * Need to ensure that loopback device has a dn_db attached to it | |
1135 | * to allow creation of neighbours against it, even though it might | |
1136 | * not have a local address of its own. Might as well do the same for | |
1137 | * all autoconfigured interfaces. | |
1138 | */ | |
1139 | if (dn_db == NULL) { | |
1140 | int err; | |
1141 | dn_db = dn_dev_create(dev, &err); | |
1142 | if (dn_db == NULL) | |
1143 | return; | |
1144 | } | |
1145 | ||
1146 | if (dev->type == ARPHRD_ETHER) { | |
1147 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1148 | return; | |
c4ea94ab | 1149 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1150 | maybe_default = 1; |
1151 | } | |
1152 | ||
1153 | if (addr == 0) | |
1154 | return; | |
1155 | ||
1156 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1157 | return; | |
1158 | ||
1159 | ifa->ifa_local = ifa->ifa_address = addr; | |
1160 | ifa->ifa_flags = 0; | |
1161 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1162 | strcpy(ifa->ifa_label, dev->name); | |
1163 | ||
1164 | dn_dev_set_ifa(dev, ifa); | |
1165 | ||
1166 | /* | |
1167 | * Automagically set the default device to the first automatically | |
1168 | * configured ethernet card in the system. | |
1169 | */ | |
1170 | if (maybe_default) { | |
1171 | dev_hold(dev); | |
1172 | if (dn_dev_set_default(dev, 0)) | |
1173 | dev_put(dev); | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | static void dn_dev_delete(struct net_device *dev) | |
1178 | { | |
1179 | struct dn_dev *dn_db = dev->dn_ptr; | |
1180 | ||
1181 | if (dn_db == NULL) | |
1182 | return; | |
1183 | ||
1184 | del_timer_sync(&dn_db->timer); | |
1185 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1186 | dn_dev_check_default(dev); | |
1187 | neigh_ifdown(&dn_neigh_table, dev); | |
1188 | ||
1189 | if (dn_db->parms.down) | |
1190 | dn_db->parms.down(dev); | |
1191 | ||
1192 | dev->dn_ptr = NULL; | |
1193 | ||
1194 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1195 | neigh_ifdown(&dn_neigh_table, dev); | |
1196 | ||
1197 | if (dn_db->router) | |
1198 | neigh_release(dn_db->router); | |
1199 | if (dn_db->peer) | |
1200 | neigh_release(dn_db->peer); | |
1201 | ||
1202 | kfree(dn_db); | |
1203 | } | |
1204 | ||
1205 | void dn_dev_down(struct net_device *dev) | |
1206 | { | |
1207 | struct dn_dev *dn_db = dev->dn_ptr; | |
1208 | struct dn_ifaddr *ifa; | |
1209 | ||
1210 | if (dn_db == NULL) | |
1211 | return; | |
1212 | ||
1213 | while((ifa = dn_db->ifa_list) != NULL) { | |
1214 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); | |
1215 | dn_dev_free_ifa(ifa); | |
1216 | } | |
1217 | ||
1218 | dn_dev_delete(dev); | |
1219 | } | |
1220 | ||
1221 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1222 | { | |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1226 | { | |
1da177e4 LT |
1227 | } |
1228 | ||
1229 | void dn_dev_hello(struct sk_buff *skb) | |
1230 | { | |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | void dn_dev_devices_off(void) | |
1234 | { | |
1235 | struct net_device *dev; | |
1236 | ||
1237 | rtnl_lock(); | |
881d966b | 1238 | for_each_netdev(&init_net, dev) |
1da177e4 LT |
1239 | dn_dev_down(dev); |
1240 | rtnl_unlock(); | |
1241 | ||
1242 | } | |
1243 | ||
1244 | void dn_dev_devices_on(void) | |
1245 | { | |
1246 | struct net_device *dev; | |
1247 | ||
1248 | rtnl_lock(); | |
881d966b | 1249 | for_each_netdev(&init_net, dev) { |
1da177e4 LT |
1250 | if (dev->flags & IFF_UP) |
1251 | dn_dev_up(dev); | |
1252 | } | |
1253 | rtnl_unlock(); | |
1254 | } | |
1255 | ||
1256 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1257 | { | |
e041c683 | 1258 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1259 | } |
1260 | ||
1261 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1262 | { | |
e041c683 | 1263 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1264 | } |
1265 | ||
1266 | #ifdef CONFIG_PROC_FS | |
7562f876 | 1267 | static inline int is_dn_dev(struct net_device *dev) |
1da177e4 | 1268 | { |
7562f876 | 1269 | return dev->dn_ptr != NULL; |
1da177e4 LT |
1270 | } |
1271 | ||
7562f876 | 1272 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
fa918602 | 1273 | __acquires(rcu) |
1da177e4 | 1274 | { |
7562f876 | 1275 | int i; |
1da177e4 LT |
1276 | struct net_device *dev; |
1277 | ||
fa918602 | 1278 | rcu_read_lock(); |
1da177e4 | 1279 | |
7562f876 PE |
1280 | if (*pos == 0) |
1281 | return SEQ_START_TOKEN; | |
1282 | ||
1283 | i = 1; | |
fa918602 | 1284 | for_each_netdev_rcu(&init_net, dev) { |
7562f876 PE |
1285 | if (!is_dn_dev(dev)) |
1286 | continue; | |
1287 | ||
1288 | if (i++ == *pos) | |
1289 | return dev; | |
1da177e4 | 1290 | } |
7562f876 PE |
1291 | |
1292 | return NULL; | |
1da177e4 LT |
1293 | } |
1294 | ||
1295 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1296 | { | |
7562f876 | 1297 | struct net_device *dev; |
1da177e4 | 1298 | |
1da177e4 | 1299 | ++*pos; |
7562f876 PE |
1300 | |
1301 | dev = (struct net_device *)v; | |
1302 | if (v == SEQ_START_TOKEN) | |
881d966b | 1303 | dev = net_device_entry(&init_net.dev_base_head); |
7562f876 | 1304 | |
fa918602 | 1305 | for_each_netdev_continue_rcu(&init_net, dev) { |
7562f876 PE |
1306 | if (!is_dn_dev(dev)) |
1307 | continue; | |
1308 | ||
1309 | return dev; | |
1310 | } | |
1311 | ||
1312 | return NULL; | |
1da177e4 LT |
1313 | } |
1314 | ||
1315 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
fa918602 | 1316 | __releases(rcu) |
1da177e4 | 1317 | { |
fa918602 | 1318 | rcu_read_unlock(); |
1da177e4 LT |
1319 | } |
1320 | ||
1321 | static char *dn_type2asc(char type) | |
1322 | { | |
1323 | switch(type) { | |
1324 | case DN_DEV_BCAST: | |
1325 | return "B"; | |
1326 | case DN_DEV_UCAST: | |
1327 | return "U"; | |
1328 | case DN_DEV_MPOINT: | |
1329 | return "M"; | |
1330 | } | |
1331 | ||
1332 | return "?"; | |
1333 | } | |
1334 | ||
1335 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1336 | { | |
1337 | if (v == SEQ_START_TOKEN) | |
429eb0fa | 1338 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
1da177e4 LT |
1339 | else { |
1340 | struct net_device *dev = v; | |
1341 | char peer_buf[DN_ASCBUF_LEN]; | |
1342 | char router_buf[DN_ASCBUF_LEN]; | |
1343 | struct dn_dev *dn_db = dev->dn_ptr; | |
1344 | ||
429eb0fa | 1345 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4 | 1346 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
429eb0fa YH |
1347 | dev->name ? dev->name : "???", |
1348 | dn_type2asc(dn_db->parms.mode), | |
1349 | 0, 0, | |
1da177e4 LT |
1350 | dn_db->t3, dn_db->parms.t3, |
1351 | mtu2blksize(dev), | |
1352 | dn_db->parms.priority, | |
1353 | dn_db->parms.state, dn_db->parms.name, | |
c4106aa8 HH |
1354 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1355 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1356 | } |
1357 | return 0; | |
1358 | } | |
1359 | ||
56b3d975 | 1360 | static const struct seq_operations dn_dev_seq_ops = { |
1da177e4 LT |
1361 | .start = dn_dev_seq_start, |
1362 | .next = dn_dev_seq_next, | |
1363 | .stop = dn_dev_seq_stop, | |
1364 | .show = dn_dev_seq_show, | |
1365 | }; | |
1366 | ||
1367 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1368 | { | |
1369 | return seq_open(file, &dn_dev_seq_ops); | |
1370 | } | |
1371 | ||
9a32144e | 1372 | static const struct file_operations dn_dev_seq_fops = { |
1da177e4 LT |
1373 | .owner = THIS_MODULE, |
1374 | .open = dn_dev_seq_open, | |
1375 | .read = seq_read, | |
1376 | .llseek = seq_lseek, | |
1377 | .release = seq_release, | |
1378 | }; | |
1379 | ||
1380 | #endif /* CONFIG_PROC_FS */ | |
1381 | ||
4e058063 | 1382 | static int addr[2]; |
1da177e4 LT |
1383 | module_param_array(addr, int, NULL, 0444); |
1384 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1385 | ||
1386 | void __init dn_dev_init(void) | |
1387 | { | |
429eb0fa YH |
1388 | if (addr[0] > 63 || addr[0] < 0) { |
1389 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1390 | return; | |
1391 | } | |
1da177e4 | 1392 | |
429eb0fa YH |
1393 | if (addr[1] > 1023 || addr[1] < 0) { |
1394 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1395 | return; | |
1396 | } | |
1da177e4 | 1397 | |
c4106aa8 | 1398 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4 LT |
1399 | |
1400 | dn_dev_devices_on(); | |
1401 | ||
fa34ddd7 TG |
1402 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL); |
1403 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL); | |
1404 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr); | |
1da177e4 | 1405 | |
457c4cbc | 1406 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
1da177e4 LT |
1407 | |
1408 | #ifdef CONFIG_SYSCTL | |
1409 | { | |
1410 | int i; | |
1411 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1412 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); | |
1413 | } | |
1414 | #endif /* CONFIG_SYSCTL */ | |
1415 | } | |
1416 | ||
1417 | void __exit dn_dev_cleanup(void) | |
1418 | { | |
1da177e4 LT |
1419 | #ifdef CONFIG_SYSCTL |
1420 | { | |
1421 | int i; | |
1422 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1423 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1424 | } | |
1425 | #endif /* CONFIG_SYSCTL */ | |
1426 | ||
457c4cbc | 1427 | proc_net_remove(&init_net, "decnet_dev"); |
1da177e4 LT |
1428 | |
1429 | dn_dev_devices_off(); | |
1430 | } |