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> | |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/system.h> | |
45 | #include <net/neighbour.h> | |
46 | #include <net/dst.h> | |
47 | #include <net/flow.h> | |
a8731cbf | 48 | #include <net/fib_rules.h> |
a6f01cac | 49 | #include <net/netlink.h> |
1da177e4 LT |
50 | #include <net/dn.h> |
51 | #include <net/dn_dev.h> | |
52 | #include <net/dn_route.h> | |
53 | #include <net/dn_neigh.h> | |
54 | #include <net/dn_fib.h> | |
55 | ||
56 | #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn)) | |
57 | ||
58 | static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; | |
59 | static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; | |
60 | static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; | |
61 | static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; | |
62 | ||
63 | extern struct neigh_table dn_neigh_table; | |
64 | ||
65 | /* | |
66 | * decnet_address is kept in network order. | |
67 | */ | |
c4ea94ab | 68 | __le16 decnet_address = 0; |
1da177e4 LT |
69 | |
70 | static DEFINE_RWLOCK(dndev_lock); | |
71 | static struct net_device *decnet_default_device; | |
e041c683 | 72 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
1da177e4 LT |
73 | |
74 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); | |
75 | static void dn_dev_delete(struct net_device *dev); | |
76 | static void rtmsg_ifa(int event, struct dn_ifaddr *ifa); | |
77 | ||
78 | static int dn_eth_up(struct net_device *); | |
79 | static void dn_eth_down(struct net_device *); | |
80 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
81 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); | |
82 | ||
83 | static struct dn_dev_parms dn_dev_list[] = { | |
84 | { | |
85 | .type = ARPHRD_ETHER, /* Ethernet */ | |
86 | .mode = DN_DEV_BCAST, | |
87 | .state = DN_DEV_S_RU, | |
88 | .t2 = 1, | |
89 | .t3 = 10, | |
90 | .name = "ethernet", | |
91 | .ctl_name = NET_DECNET_CONF_ETHER, | |
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", | |
103 | .ctl_name = NET_DECNET_CONF_GRE, | |
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", | |
114 | .ctl_name = NET_DECNET_CONF_X25, | |
115 | .timer3 = dn_send_ptp_hello, | |
116 | }, | |
117 | #endif | |
118 | #if 0 | |
119 | { | |
120 | .type = ARPHRD_PPP, /* DECnet over PPP */ | |
121 | .mode = DN_DEV_BCAST, | |
122 | .state = DN_DEV_S_RU, | |
123 | .t2 = 1, | |
124 | .t3 = 10, | |
125 | .name = "ppp", | |
126 | .ctl_name = NET_DECNET_CONF_PPP, | |
127 | .timer3 = dn_send_brd_hello, | |
128 | }, | |
129 | #endif | |
130 | { | |
131 | .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ | |
132 | .mode = DN_DEV_UCAST, | |
133 | .state = DN_DEV_S_DS, | |
134 | .t2 = 1, | |
135 | .t3 = 120, | |
136 | .name = "ddcmp", | |
137 | .ctl_name = NET_DECNET_CONF_DDCMP, | |
138 | .timer3 = dn_send_ptp_hello, | |
139 | }, | |
140 | { | |
141 | .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ | |
142 | .mode = DN_DEV_BCAST, | |
143 | .state = DN_DEV_S_RU, | |
144 | .t2 = 1, | |
145 | .t3 = 10, | |
146 | .name = "loopback", | |
147 | .ctl_name = NET_DECNET_CONF_LOOPBACK, | |
148 | .timer3 = dn_send_brd_hello, | |
149 | } | |
150 | }; | |
151 | ||
152 | #define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms)) | |
153 | ||
154 | #define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x)) | |
155 | ||
156 | #ifdef CONFIG_SYSCTL | |
157 | ||
158 | static int min_t2[] = { 1 }; | |
159 | static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ | |
160 | static int min_t3[] = { 1 }; | |
161 | static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ | |
162 | ||
163 | static int min_priority[1]; | |
164 | static int max_priority[] = { 127 }; /* From DECnet spec */ | |
165 | ||
166 | static int dn_forwarding_proc(ctl_table *, int, struct file *, | |
167 | void __user *, size_t *, loff_t *); | |
168 | static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen, | |
169 | void __user *oldval, size_t __user *oldlenp, | |
170 | void __user *newval, size_t newlen, | |
171 | void **context); | |
172 | ||
173 | static struct dn_dev_sysctl_table { | |
174 | struct ctl_table_header *sysctl_header; | |
175 | ctl_table dn_dev_vars[5]; | |
176 | ctl_table dn_dev_dev[2]; | |
177 | ctl_table dn_dev_conf_dir[2]; | |
178 | ctl_table dn_dev_proto_dir[2]; | |
179 | ctl_table dn_dev_root_dir[2]; | |
180 | } dn_dev_sysctl = { | |
181 | NULL, | |
182 | { | |
183 | { | |
184 | .ctl_name = NET_DECNET_CONF_DEV_FORWARDING, | |
185 | .procname = "forwarding", | |
186 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), | |
187 | .maxlen = sizeof(int), | |
188 | .mode = 0644, | |
189 | .proc_handler = dn_forwarding_proc, | |
190 | .strategy = dn_forwarding_sysctl, | |
191 | }, | |
192 | { | |
193 | .ctl_name = NET_DECNET_CONF_DEV_PRIORITY, | |
194 | .procname = "priority", | |
195 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), | |
196 | .maxlen = sizeof(int), | |
197 | .mode = 0644, | |
198 | .proc_handler = proc_dointvec_minmax, | |
199 | .strategy = sysctl_intvec, | |
200 | .extra1 = &min_priority, | |
201 | .extra2 = &max_priority | |
202 | }, | |
203 | { | |
204 | .ctl_name = NET_DECNET_CONF_DEV_T2, | |
205 | .procname = "t2", | |
206 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), | |
207 | .maxlen = sizeof(int), | |
208 | .mode = 0644, | |
209 | .proc_handler = proc_dointvec_minmax, | |
210 | .strategy = sysctl_intvec, | |
211 | .extra1 = &min_t2, | |
212 | .extra2 = &max_t2 | |
213 | }, | |
214 | { | |
215 | .ctl_name = NET_DECNET_CONF_DEV_T3, | |
216 | .procname = "t3", | |
217 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), | |
218 | .maxlen = sizeof(int), | |
219 | .mode = 0644, | |
220 | .proc_handler = proc_dointvec_minmax, | |
221 | .strategy = sysctl_intvec, | |
222 | .extra1 = &min_t3, | |
223 | .extra2 = &max_t3 | |
224 | }, | |
225 | {0} | |
226 | }, | |
227 | {{ | |
228 | .ctl_name = 0, | |
229 | .procname = "", | |
230 | .mode = 0555, | |
231 | .child = dn_dev_sysctl.dn_dev_vars | |
232 | }, {0}}, | |
233 | {{ | |
234 | .ctl_name = NET_DECNET_CONF, | |
235 | .procname = "conf", | |
236 | .mode = 0555, | |
237 | .child = dn_dev_sysctl.dn_dev_dev | |
238 | }, {0}}, | |
239 | {{ | |
240 | .ctl_name = NET_DECNET, | |
241 | .procname = "decnet", | |
242 | .mode = 0555, | |
243 | .child = dn_dev_sysctl.dn_dev_conf_dir | |
244 | }, {0}}, | |
245 | {{ | |
246 | .ctl_name = CTL_NET, | |
247 | .procname = "net", | |
248 | .mode = 0555, | |
249 | .child = dn_dev_sysctl.dn_dev_proto_dir | |
250 | }, {0}} | |
251 | }; | |
252 | ||
253 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
254 | { | |
255 | struct dn_dev_sysctl_table *t; | |
256 | int i; | |
257 | ||
c66b721a | 258 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 LT |
259 | if (t == NULL) |
260 | return; | |
261 | ||
1da177e4 LT |
262 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
263 | long offset = (long)t->dn_dev_vars[i].data; | |
264 | t->dn_dev_vars[i].data = ((char *)parms) + offset; | |
265 | t->dn_dev_vars[i].de = NULL; | |
266 | } | |
267 | ||
268 | if (dev) { | |
269 | t->dn_dev_dev[0].procname = dev->name; | |
270 | t->dn_dev_dev[0].ctl_name = dev->ifindex; | |
271 | } else { | |
272 | t->dn_dev_dev[0].procname = parms->name; | |
273 | t->dn_dev_dev[0].ctl_name = parms->ctl_name; | |
274 | } | |
275 | ||
276 | t->dn_dev_dev[0].child = t->dn_dev_vars; | |
277 | t->dn_dev_dev[0].de = NULL; | |
278 | t->dn_dev_conf_dir[0].child = t->dn_dev_dev; | |
279 | t->dn_dev_conf_dir[0].de = NULL; | |
280 | t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir; | |
281 | t->dn_dev_proto_dir[0].de = NULL; | |
282 | t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir; | |
283 | t->dn_dev_root_dir[0].de = NULL; | |
284 | t->dn_dev_vars[0].extra1 = (void *)dev; | |
285 | ||
286 | t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0); | |
287 | if (t->sysctl_header == NULL) | |
288 | kfree(t); | |
289 | else | |
290 | parms->sysctl = t; | |
291 | } | |
292 | ||
293 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
294 | { | |
295 | if (parms->sysctl) { | |
296 | struct dn_dev_sysctl_table *t = parms->sysctl; | |
297 | parms->sysctl = NULL; | |
298 | unregister_sysctl_table(t->sysctl_header); | |
299 | kfree(t); | |
300 | } | |
301 | } | |
302 | ||
303 | static int dn_forwarding_proc(ctl_table *table, int write, | |
304 | struct file *filep, | |
305 | void __user *buffer, | |
306 | size_t *lenp, loff_t *ppos) | |
307 | { | |
308 | #ifdef CONFIG_DECNET_ROUTER | |
309 | struct net_device *dev = table->extra1; | |
310 | struct dn_dev *dn_db; | |
311 | int err; | |
312 | int tmp, old; | |
313 | ||
314 | if (table->extra1 == NULL) | |
315 | return -EINVAL; | |
316 | ||
317 | dn_db = dev->dn_ptr; | |
318 | old = dn_db->parms.forwarding; | |
319 | ||
320 | err = proc_dointvec(table, write, filep, buffer, lenp, ppos); | |
321 | ||
322 | if ((err >= 0) && write) { | |
323 | if (dn_db->parms.forwarding < 0) | |
324 | dn_db->parms.forwarding = 0; | |
325 | if (dn_db->parms.forwarding > 2) | |
326 | dn_db->parms.forwarding = 2; | |
327 | /* | |
328 | * What an ugly hack this is... its works, just. It | |
329 | * would be nice if sysctl/proc were just that little | |
330 | * bit more flexible so I don't have to write a special | |
331 | * routine, or suffer hacks like this - SJW | |
332 | */ | |
333 | tmp = dn_db->parms.forwarding; | |
334 | dn_db->parms.forwarding = old; | |
335 | if (dn_db->parms.down) | |
336 | dn_db->parms.down(dev); | |
337 | dn_db->parms.forwarding = tmp; | |
338 | if (dn_db->parms.up) | |
339 | dn_db->parms.up(dev); | |
340 | } | |
341 | ||
342 | return err; | |
343 | #else | |
344 | return -EINVAL; | |
345 | #endif | |
346 | } | |
347 | ||
348 | static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen, | |
349 | void __user *oldval, size_t __user *oldlenp, | |
350 | void __user *newval, size_t newlen, | |
351 | void **context) | |
352 | { | |
353 | #ifdef CONFIG_DECNET_ROUTER | |
354 | struct net_device *dev = table->extra1; | |
355 | struct dn_dev *dn_db; | |
356 | int value; | |
357 | ||
358 | if (table->extra1 == NULL) | |
359 | return -EINVAL; | |
360 | ||
361 | dn_db = dev->dn_ptr; | |
362 | ||
363 | if (newval && newlen) { | |
364 | if (newlen != sizeof(int)) | |
365 | return -EINVAL; | |
366 | ||
367 | if (get_user(value, (int __user *)newval)) | |
368 | return -EFAULT; | |
369 | if (value < 0) | |
370 | return -EINVAL; | |
371 | if (value > 2) | |
372 | return -EINVAL; | |
373 | ||
374 | if (dn_db->parms.down) | |
375 | dn_db->parms.down(dev); | |
376 | dn_db->parms.forwarding = value; | |
377 | if (dn_db->parms.up) | |
378 | dn_db->parms.up(dev); | |
379 | } | |
380 | ||
381 | return 0; | |
382 | #else | |
383 | return -EINVAL; | |
384 | #endif | |
385 | } | |
386 | ||
387 | #else /* CONFIG_SYSCTL */ | |
388 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) | |
389 | { | |
390 | } | |
391 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) | |
392 | { | |
393 | } | |
394 | ||
395 | #endif /* CONFIG_SYSCTL */ | |
396 | ||
397 | static inline __u16 mtu2blksize(struct net_device *dev) | |
398 | { | |
399 | u32 blksize = dev->mtu; | |
400 | if (blksize > 0xffff) | |
401 | blksize = 0xffff; | |
402 | ||
403 | if (dev->type == ARPHRD_ETHER || | |
404 | dev->type == ARPHRD_PPP || | |
405 | dev->type == ARPHRD_IPGRE || | |
406 | dev->type == ARPHRD_LOOPBACK) | |
407 | blksize -= 2; | |
408 | ||
409 | return (__u16)blksize; | |
410 | } | |
411 | ||
412 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) | |
413 | { | |
414 | struct dn_ifaddr *ifa; | |
415 | ||
0da974f4 | 416 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
417 | |
418 | return ifa; | |
419 | } | |
420 | ||
421 | static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa) | |
422 | { | |
423 | kfree(ifa); | |
424 | } | |
425 | ||
426 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy) | |
427 | { | |
428 | struct dn_ifaddr *ifa1 = *ifap; | |
429 | unsigned char mac_addr[6]; | |
430 | struct net_device *dev = dn_db->dev; | |
431 | ||
432 | ASSERT_RTNL(); | |
433 | ||
434 | *ifap = ifa1->ifa_next; | |
435 | ||
436 | if (dn_db->dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 437 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 LT |
438 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
439 | dev_mc_delete(dev, mac_addr, ETH_ALEN, 0); | |
440 | } | |
441 | } | |
442 | ||
443 | rtmsg_ifa(RTM_DELADDR, ifa1); | |
e041c683 | 444 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 LT |
445 | if (destroy) { |
446 | dn_dev_free_ifa(ifa1); | |
447 | ||
448 | if (dn_db->ifa_list == NULL) | |
449 | dn_dev_delete(dn_db->dev); | |
450 | } | |
451 | } | |
452 | ||
453 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
454 | { | |
455 | struct net_device *dev = dn_db->dev; | |
456 | struct dn_ifaddr *ifa1; | |
457 | unsigned char mac_addr[6]; | |
458 | ||
459 | ASSERT_RTNL(); | |
460 | ||
461 | /* Check for duplicates */ | |
462 | for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { | |
463 | if (ifa1->ifa_local == ifa->ifa_local) | |
464 | return -EEXIST; | |
465 | } | |
466 | ||
467 | if (dev->type == ARPHRD_ETHER) { | |
c4ea94ab | 468 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
1da177e4 LT |
469 | dn_dn2eth(mac_addr, ifa->ifa_local); |
470 | dev_mc_add(dev, mac_addr, ETH_ALEN, 0); | |
471 | dev_mc_upload(dev); | |
472 | } | |
473 | } | |
474 | ||
475 | ifa->ifa_next = dn_db->ifa_list; | |
476 | dn_db->ifa_list = ifa; | |
477 | ||
478 | rtmsg_ifa(RTM_NEWADDR, ifa); | |
e041c683 | 479 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
480 | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) | |
485 | { | |
486 | struct dn_dev *dn_db = dev->dn_ptr; | |
487 | int rv; | |
488 | ||
489 | if (dn_db == NULL) { | |
490 | int err; | |
491 | dn_db = dn_dev_create(dev, &err); | |
492 | if (dn_db == NULL) | |
493 | return err; | |
494 | } | |
495 | ||
496 | ifa->ifa_dev = dn_db; | |
497 | ||
498 | if (dev->flags & IFF_LOOPBACK) | |
499 | ifa->ifa_scope = RT_SCOPE_HOST; | |
500 | ||
501 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
502 | if (rv) | |
503 | dn_dev_free_ifa(ifa); | |
504 | return rv; | |
505 | } | |
506 | ||
507 | ||
508 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) | |
509 | { | |
510 | char buffer[DN_IFREQ_SIZE]; | |
511 | struct ifreq *ifr = (struct ifreq *)buffer; | |
512 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; | |
513 | struct dn_dev *dn_db; | |
514 | struct net_device *dev; | |
515 | struct dn_ifaddr *ifa = NULL, **ifap = NULL; | |
516 | int ret = 0; | |
517 | ||
518 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) | |
519 | return -EFAULT; | |
520 | ifr->ifr_name[IFNAMSIZ-1] = 0; | |
521 | ||
522 | #ifdef CONFIG_KMOD | |
523 | dev_load(ifr->ifr_name); | |
524 | #endif | |
525 | ||
526 | switch(cmd) { | |
527 | case SIOCGIFADDR: | |
528 | break; | |
529 | case SIOCSIFADDR: | |
530 | if (!capable(CAP_NET_ADMIN)) | |
531 | return -EACCES; | |
532 | if (sdn->sdn_family != AF_DECnet) | |
533 | return -EINVAL; | |
534 | break; | |
535 | default: | |
536 | return -EINVAL; | |
537 | } | |
538 | ||
539 | rtnl_lock(); | |
540 | ||
541 | if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) { | |
542 | ret = -ENODEV; | |
543 | goto done; | |
544 | } | |
545 | ||
546 | if ((dn_db = dev->dn_ptr) != NULL) { | |
547 | for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) | |
548 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) | |
549 | break; | |
550 | } | |
551 | ||
552 | if (ifa == NULL && cmd != SIOCSIFADDR) { | |
553 | ret = -EADDRNOTAVAIL; | |
554 | goto done; | |
555 | } | |
556 | ||
557 | switch(cmd) { | |
558 | case SIOCGIFADDR: | |
c4ea94ab | 559 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
1da177e4 LT |
560 | goto rarok; |
561 | ||
562 | case SIOCSIFADDR: | |
563 | if (!ifa) { | |
564 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { | |
565 | ret = -ENOBUFS; | |
566 | break; | |
567 | } | |
568 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
569 | } else { | |
570 | if (ifa->ifa_local == dn_saddr2dn(sdn)) | |
571 | break; | |
572 | dn_dev_del_ifa(dn_db, ifap, 0); | |
573 | } | |
574 | ||
575 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); | |
576 | ||
577 | ret = dn_dev_set_ifa(dev, ifa); | |
578 | } | |
579 | done: | |
580 | rtnl_unlock(); | |
581 | ||
582 | return ret; | |
583 | rarok: | |
584 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) | |
585 | ret = -EFAULT; | |
586 | goto done; | |
587 | } | |
588 | ||
589 | struct net_device *dn_dev_get_default(void) | |
590 | { | |
591 | struct net_device *dev; | |
592 | read_lock(&dndev_lock); | |
593 | dev = decnet_default_device; | |
594 | if (dev) { | |
595 | if (dev->dn_ptr) | |
596 | dev_hold(dev); | |
597 | else | |
598 | dev = NULL; | |
599 | } | |
600 | read_unlock(&dndev_lock); | |
601 | return dev; | |
602 | } | |
603 | ||
604 | int dn_dev_set_default(struct net_device *dev, int force) | |
605 | { | |
606 | struct net_device *old = NULL; | |
607 | int rv = -EBUSY; | |
608 | if (!dev->dn_ptr) | |
609 | return -ENODEV; | |
610 | write_lock(&dndev_lock); | |
611 | if (force || decnet_default_device == NULL) { | |
612 | old = decnet_default_device; | |
613 | decnet_default_device = dev; | |
614 | rv = 0; | |
615 | } | |
616 | write_unlock(&dndev_lock); | |
617 | if (old) | |
6a57b2ee | 618 | dev_put(old); |
1da177e4 LT |
619 | return rv; |
620 | } | |
621 | ||
622 | static void dn_dev_check_default(struct net_device *dev) | |
623 | { | |
624 | write_lock(&dndev_lock); | |
625 | if (dev == decnet_default_device) { | |
626 | decnet_default_device = NULL; | |
627 | } else { | |
628 | dev = NULL; | |
629 | } | |
630 | write_unlock(&dndev_lock); | |
631 | if (dev) | |
632 | dev_put(dev); | |
633 | } | |
634 | ||
635 | static struct dn_dev *dn_dev_by_index(int ifindex) | |
636 | { | |
637 | struct net_device *dev; | |
638 | struct dn_dev *dn_dev = NULL; | |
639 | dev = dev_get_by_index(ifindex); | |
640 | if (dev) { | |
641 | dn_dev = dev->dn_ptr; | |
642 | dev_put(dev); | |
643 | } | |
644 | ||
645 | return dn_dev; | |
646 | } | |
647 | ||
648 | static int dn_dev_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
649 | { | |
650 | struct rtattr **rta = arg; | |
651 | struct dn_dev *dn_db; | |
652 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
653 | struct dn_ifaddr *ifa, **ifap; | |
654 | ||
655 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) | |
656 | return -EADDRNOTAVAIL; | |
657 | ||
658 | for(ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) { | |
659 | void *tmp = rta[IFA_LOCAL-1]; | |
660 | if ((tmp && memcmp(RTA_DATA(tmp), &ifa->ifa_local, 2)) || | |
661 | (rta[IFA_LABEL-1] && rtattr_strcmp(rta[IFA_LABEL-1], ifa->ifa_label))) | |
662 | continue; | |
663 | ||
664 | dn_dev_del_ifa(dn_db, ifap, 1); | |
665 | return 0; | |
666 | } | |
667 | ||
668 | return -EADDRNOTAVAIL; | |
669 | } | |
670 | ||
671 | static int dn_dev_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
672 | { | |
673 | struct rtattr **rta = arg; | |
674 | struct net_device *dev; | |
675 | struct dn_dev *dn_db; | |
676 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); | |
677 | struct dn_ifaddr *ifa; | |
678 | int rv; | |
679 | ||
680 | if (rta[IFA_LOCAL-1] == NULL) | |
681 | return -EINVAL; | |
682 | ||
683 | if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL) | |
684 | return -ENODEV; | |
685 | ||
686 | if ((dn_db = dev->dn_ptr) == NULL) { | |
687 | int err; | |
688 | dn_db = dn_dev_create(dev, &err); | |
689 | if (!dn_db) | |
690 | return err; | |
691 | } | |
692 | ||
693 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
694 | return -ENOBUFS; | |
695 | ||
696 | if (!rta[IFA_ADDRESS - 1]) | |
697 | rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1]; | |
698 | memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL-1]), 2); | |
699 | memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS-1]), 2); | |
700 | ifa->ifa_flags = ifm->ifa_flags; | |
701 | ifa->ifa_scope = ifm->ifa_scope; | |
702 | ifa->ifa_dev = dn_db; | |
703 | if (rta[IFA_LABEL-1]) | |
704 | rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL-1], IFNAMSIZ); | |
705 | else | |
706 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
707 | ||
708 | rv = dn_dev_insert_ifa(dn_db, ifa); | |
709 | if (rv) | |
710 | dn_dev_free_ifa(ifa); | |
711 | return rv; | |
712 | } | |
713 | ||
a6f01cac TG |
714 | static inline size_t dn_ifaddr_nlmsg_size(void) |
715 | { | |
716 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
717 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ | |
718 | + nla_total_size(2) /* IFA_ADDRESS */ | |
719 | + nla_total_size(2); /* IFA_LOCAL */ | |
720 | } | |
721 | ||
1da177e4 | 722 | static int dn_dev_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
b6544c0b | 723 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
724 | { |
725 | struct ifaddrmsg *ifm; | |
726 | struct nlmsghdr *nlh; | |
727 | unsigned char *b = skb->tail; | |
728 | ||
b6544c0b | 729 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
1da177e4 LT |
730 | ifm = NLMSG_DATA(nlh); |
731 | ||
732 | ifm->ifa_family = AF_DECnet; | |
733 | ifm->ifa_prefixlen = 16; | |
734 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; | |
735 | ifm->ifa_scope = ifa->ifa_scope; | |
736 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
737 | if (ifa->ifa_address) | |
738 | RTA_PUT(skb, IFA_ADDRESS, 2, &ifa->ifa_address); | |
739 | if (ifa->ifa_local) | |
740 | RTA_PUT(skb, IFA_LOCAL, 2, &ifa->ifa_local); | |
741 | if (ifa->ifa_label[0]) | |
742 | RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label); | |
743 | nlh->nlmsg_len = skb->tail - b; | |
744 | return skb->len; | |
745 | ||
746 | nlmsg_failure: | |
747 | rtattr_failure: | |
748 | skb_trim(skb, b - skb->data); | |
749 | return -1; | |
750 | } | |
751 | ||
752 | static void rtmsg_ifa(int event, struct dn_ifaddr *ifa) | |
753 | { | |
754 | struct sk_buff *skb; | |
dc738dd8 | 755 | int err = -ENOBUFS; |
1da177e4 | 756 | |
a6f01cac | 757 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd8 TG |
758 | if (skb == NULL) |
759 | goto errout; | |
760 | ||
761 | err = dn_dev_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
a6f01cac TG |
762 | /* failure implies BUG in dn_ifaddr_nlmsg_size() */ |
763 | BUG_ON(err < 0); | |
dc738dd8 TG |
764 | |
765 | err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); | |
766 | errout: | |
767 | if (err < 0) | |
768 | rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err); | |
1da177e4 LT |
769 | } |
770 | ||
771 | static int dn_dev_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
772 | { | |
773 | int idx, dn_idx; | |
774 | int s_idx, s_dn_idx; | |
775 | struct net_device *dev; | |
776 | struct dn_dev *dn_db; | |
777 | struct dn_ifaddr *ifa; | |
778 | ||
779 | s_idx = cb->args[0]; | |
780 | s_dn_idx = dn_idx = cb->args[1]; | |
781 | read_lock(&dev_base_lock); | |
782 | for(dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { | |
783 | if (idx < s_idx) | |
784 | continue; | |
785 | if (idx > s_idx) | |
786 | s_dn_idx = 0; | |
787 | if ((dn_db = dev->dn_ptr) == NULL) | |
788 | continue; | |
789 | ||
790 | for(ifa = dn_db->ifa_list, dn_idx = 0; ifa; ifa = ifa->ifa_next, dn_idx++) { | |
791 | if (dn_idx < s_dn_idx) | |
792 | continue; | |
793 | ||
794 | if (dn_dev_fill_ifaddr(skb, ifa, | |
795 | NETLINK_CB(cb->skb).pid, | |
796 | cb->nlh->nlmsg_seq, | |
b6544c0b JHS |
797 | RTM_NEWADDR, |
798 | NLM_F_MULTI) <= 0) | |
1da177e4 LT |
799 | goto done; |
800 | } | |
801 | } | |
802 | done: | |
803 | read_unlock(&dev_base_lock); | |
804 | cb->args[0] = idx; | |
805 | cb->args[1] = dn_idx; | |
806 | ||
807 | return skb->len; | |
808 | } | |
809 | ||
c4ea94ab | 810 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4 LT |
811 | { |
812 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
813 | struct dn_ifaddr *ifa; | |
814 | int rv = -ENODEV; | |
815 | if (dn_db == NULL) | |
816 | goto out; | |
817 | ifa = dn_db->ifa_list; | |
818 | if (ifa != NULL) { | |
819 | *addr = ifa->ifa_local; | |
820 | rv = 0; | |
821 | } | |
822 | out: | |
823 | return rv; | |
824 | } | |
825 | ||
826 | /* | |
827 | * Find a default address to bind to. | |
828 | * | |
829 | * This is one of those areas where the initial VMS concepts don't really | |
830 | * map onto the Linux concepts, and since we introduced multiple addresses | |
831 | * per interface we have to cope with slightly odd ways of finding out what | |
832 | * "our address" really is. Mostly it's not a problem; for this we just guess | |
833 | * a sensible default. Eventually the routing code will take care of all the | |
834 | * nasties for us I hope. | |
835 | */ | |
c4ea94ab | 836 | int dn_dev_bind_default(__le16 *addr) |
1da177e4 LT |
837 | { |
838 | struct net_device *dev; | |
839 | int rv; | |
840 | dev = dn_dev_get_default(); | |
841 | last_chance: | |
842 | if (dev) { | |
843 | read_lock(&dev_base_lock); | |
844 | rv = dn_dev_get_first(dev, addr); | |
845 | read_unlock(&dev_base_lock); | |
846 | dev_put(dev); | |
847 | if (rv == 0 || dev == &loopback_dev) | |
848 | return rv; | |
849 | } | |
850 | dev = &loopback_dev; | |
851 | dev_hold(dev); | |
852 | goto last_chance; | |
853 | } | |
854 | ||
855 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
856 | { | |
857 | struct endnode_hello_message *msg; | |
858 | struct sk_buff *skb = NULL; | |
c4ea94ab | 859 | __le16 *pktlen; |
1da177e4 LT |
860 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
861 | ||
862 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) | |
863 | return; | |
864 | ||
865 | skb->dev = dev; | |
866 | ||
867 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); | |
868 | ||
869 | msg->msgflg = 0x0D; | |
870 | memcpy(msg->tiver, dn_eco_version, 3); | |
871 | dn_dn2eth(msg->id, ifa->ifa_local); | |
872 | msg->iinfo = DN_RT_INFO_ENDN; | |
873 | msg->blksize = dn_htons(mtu2blksize(dev)); | |
874 | msg->area = 0x00; | |
875 | memset(msg->seed, 0, 8); | |
876 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); | |
877 | ||
878 | if (dn_db->router) { | |
879 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
880 | dn_dn2eth(msg->neighbor, dn->addr); | |
881 | } | |
882 | ||
883 | msg->timer = dn_htons((unsigned short)dn_db->parms.t3); | |
884 | msg->mpd = 0x00; | |
885 | msg->datalen = 0x02; | |
886 | memset(msg->data, 0xAA, 2); | |
887 | ||
c4ea94ab | 888 | pktlen = (__le16 *)skb_push(skb,2); |
1da177e4 LT |
889 | *pktlen = dn_htons(skb->len - 2); |
890 | ||
891 | skb->nh.raw = skb->data; | |
892 | ||
893 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); | |
894 | } | |
895 | ||
896 | ||
897 | #define DRDELAY (5 * HZ) | |
898 | ||
899 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) | |
900 | { | |
901 | /* First check time since device went up */ | |
902 | if ((jiffies - dn_db->uptime) < DRDELAY) | |
903 | return 0; | |
904 | ||
905 | /* If there is no router, then yes... */ | |
906 | if (!dn_db->router) | |
907 | return 1; | |
908 | ||
909 | /* otherwise only if we have a higher priority or.. */ | |
910 | if (dn->priority < dn_db->parms.priority) | |
911 | return 1; | |
912 | ||
913 | /* if we have equal priority and a higher node number */ | |
914 | if (dn->priority != dn_db->parms.priority) | |
915 | return 0; | |
916 | ||
917 | if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local)) | |
918 | return 1; | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
924 | { | |
925 | int n; | |
926 | struct dn_dev *dn_db = dev->dn_ptr; | |
927 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; | |
928 | struct sk_buff *skb; | |
929 | size_t size; | |
930 | unsigned char *ptr; | |
931 | unsigned char *i1, *i2; | |
c4ea94ab | 932 | __le16 *pktlen; |
1da177e4 LT |
933 | char *src; |
934 | ||
935 | if (mtu2blksize(dev) < (26 + 7)) | |
936 | return; | |
937 | ||
938 | n = mtu2blksize(dev) - 26; | |
939 | n /= 7; | |
940 | ||
941 | if (n > 32) | |
942 | n = 32; | |
943 | ||
944 | size = 2 + 26 + 7 * n; | |
945 | ||
946 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) | |
947 | return; | |
948 | ||
949 | skb->dev = dev; | |
950 | ptr = skb_put(skb, size); | |
951 | ||
952 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; | |
953 | *ptr++ = 2; /* ECO */ | |
954 | *ptr++ = 0; | |
955 | *ptr++ = 0; | |
956 | dn_dn2eth(ptr, ifa->ifa_local); | |
957 | src = ptr; | |
958 | ptr += ETH_ALEN; | |
959 | *ptr++ = dn_db->parms.forwarding == 1 ? | |
960 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; | |
c4ea94ab | 961 | *((__le16 *)ptr) = dn_htons(mtu2blksize(dev)); |
1da177e4 LT |
962 | ptr += 2; |
963 | *ptr++ = dn_db->parms.priority; /* Priority */ | |
964 | *ptr++ = 0; /* Area: Reserved */ | |
c4ea94ab | 965 | *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3); |
1da177e4 LT |
966 | ptr += 2; |
967 | *ptr++ = 0; /* MPD: Reserved */ | |
968 | i1 = ptr++; | |
969 | memset(ptr, 0, 7); /* Name: Reserved */ | |
970 | ptr += 7; | |
971 | i2 = ptr++; | |
972 | ||
973 | n = dn_neigh_elist(dev, ptr, n); | |
974 | ||
975 | *i2 = 7 * n; | |
976 | *i1 = 8 + *i2; | |
977 | ||
978 | skb_trim(skb, (27 + *i2)); | |
979 | ||
c4ea94ab | 980 | pktlen = (__le16 *)skb_push(skb, 2); |
1da177e4 LT |
981 | *pktlen = dn_htons(skb->len - 2); |
982 | ||
983 | skb->nh.raw = skb->data; | |
984 | ||
985 | if (dn_am_i_a_router(dn, dn_db, ifa)) { | |
986 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
987 | if (skb2) { | |
988 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); | |
989 | } | |
990 | } | |
991 | ||
992 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
993 | } | |
994 | ||
995 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
996 | { | |
997 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
998 | ||
999 | if (dn_db->parms.forwarding == 0) | |
1000 | dn_send_endnode_hello(dev, ifa); | |
1001 | else | |
1002 | dn_send_router_hello(dev, ifa); | |
1003 | } | |
1004 | ||
1005 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) | |
1006 | { | |
1007 | int tdlen = 16; | |
1008 | int size = dev->hard_header_len + 2 + 4 + tdlen; | |
1009 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); | |
1010 | int i; | |
1011 | unsigned char *ptr; | |
1012 | char src[ETH_ALEN]; | |
1013 | ||
1014 | if (skb == NULL) | |
1015 | return ; | |
1016 | ||
1017 | skb->dev = dev; | |
1018 | skb_push(skb, dev->hard_header_len); | |
1019 | ptr = skb_put(skb, 2 + 4 + tdlen); | |
1020 | ||
1021 | *ptr++ = DN_RT_PKT_HELO; | |
c4ea94ab | 1022 | *((__le16 *)ptr) = ifa->ifa_local; |
1da177e4 LT |
1023 | ptr += 2; |
1024 | *ptr++ = tdlen; | |
1025 | ||
1026 | for(i = 0; i < tdlen; i++) | |
1027 | *ptr++ = 0252; | |
1028 | ||
1029 | dn_dn2eth(src, ifa->ifa_local); | |
1030 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); | |
1031 | } | |
1032 | ||
1033 | static int dn_eth_up(struct net_device *dev) | |
1034 | { | |
1035 | struct dn_dev *dn_db = dev->dn_ptr; | |
1036 | ||
1037 | if (dn_db->parms.forwarding == 0) | |
1038 | dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); | |
1039 | else | |
1040 | dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); | |
1041 | ||
1042 | dev_mc_upload(dev); | |
1043 | ||
1044 | dn_db->use_long = 1; | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | static void dn_eth_down(struct net_device *dev) | |
1050 | { | |
1051 | struct dn_dev *dn_db = dev->dn_ptr; | |
1052 | ||
1053 | if (dn_db->parms.forwarding == 0) | |
1054 | dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); | |
1055 | else | |
1056 | dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); | |
1057 | } | |
1058 | ||
1059 | static void dn_dev_set_timer(struct net_device *dev); | |
1060 | ||
1061 | static void dn_dev_timer_func(unsigned long arg) | |
1062 | { | |
1063 | struct net_device *dev = (struct net_device *)arg; | |
1064 | struct dn_dev *dn_db = dev->dn_ptr; | |
1065 | struct dn_ifaddr *ifa; | |
1066 | ||
1067 | if (dn_db->t3 <= dn_db->parms.t2) { | |
1068 | if (dn_db->parms.timer3) { | |
1069 | for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1070 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) | |
1071 | dn_db->parms.timer3(dev, ifa); | |
1072 | } | |
1073 | } | |
1074 | dn_db->t3 = dn_db->parms.t3; | |
1075 | } else { | |
1076 | dn_db->t3 -= dn_db->parms.t2; | |
1077 | } | |
1078 | ||
1079 | dn_dev_set_timer(dev); | |
1080 | } | |
1081 | ||
1082 | static void dn_dev_set_timer(struct net_device *dev) | |
1083 | { | |
1084 | struct dn_dev *dn_db = dev->dn_ptr; | |
1085 | ||
1086 | if (dn_db->parms.t2 > dn_db->parms.t3) | |
1087 | dn_db->parms.t2 = dn_db->parms.t3; | |
1088 | ||
1089 | dn_db->timer.data = (unsigned long)dev; | |
1090 | dn_db->timer.function = dn_dev_timer_func; | |
1091 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); | |
1092 | ||
1093 | add_timer(&dn_db->timer); | |
1094 | } | |
1095 | ||
1096 | struct dn_dev *dn_dev_create(struct net_device *dev, int *err) | |
1097 | { | |
1098 | int i; | |
1099 | struct dn_dev_parms *p = dn_dev_list; | |
1100 | struct dn_dev *dn_db; | |
1101 | ||
1102 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { | |
1103 | if (p->type == dev->type) | |
1104 | break; | |
1105 | } | |
1106 | ||
1107 | *err = -ENODEV; | |
1108 | if (i == DN_DEV_LIST_SIZE) | |
1109 | return NULL; | |
1110 | ||
1111 | *err = -ENOBUFS; | |
0da974f4 | 1112 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
1113 | return NULL; |
1114 | ||
1da177e4 LT |
1115 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
1116 | smp_wmb(); | |
1117 | dev->dn_ptr = dn_db; | |
1118 | dn_db->dev = dev; | |
1119 | init_timer(&dn_db->timer); | |
1120 | ||
1121 | dn_db->uptime = jiffies; | |
1122 | if (dn_db->parms.up) { | |
1123 | if (dn_db->parms.up(dev) < 0) { | |
1124 | dev->dn_ptr = NULL; | |
1125 | kfree(dn_db); | |
1126 | return NULL; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); | |
1131 | ||
1132 | dn_dev_sysctl_register(dev, &dn_db->parms); | |
1133 | ||
1134 | dn_dev_set_timer(dev); | |
1135 | ||
1136 | *err = 0; | |
1137 | return dn_db; | |
1138 | } | |
1139 | ||
1140 | ||
1141 | /* | |
1142 | * This processes a device up event. We only start up | |
1143 | * the loopback device & ethernet devices with correct | |
1144 | * MAC addreses automatically. Others must be started | |
1145 | * specifically. | |
1146 | * | |
1147 | * FIXME: How should we configure the loopback address ? If we could dispense | |
1148 | * with using decnet_address here and for autobind, it will be one less thing | |
1149 | * for users to worry about setting up. | |
1150 | */ | |
1151 | ||
1152 | void dn_dev_up(struct net_device *dev) | |
1153 | { | |
1154 | struct dn_ifaddr *ifa; | |
c4ea94ab | 1155 | __le16 addr = decnet_address; |
1da177e4 LT |
1156 | int maybe_default = 0; |
1157 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; | |
1158 | ||
1159 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
1160 | return; | |
1161 | ||
1162 | /* | |
1163 | * Need to ensure that loopback device has a dn_db attached to it | |
1164 | * to allow creation of neighbours against it, even though it might | |
1165 | * not have a local address of its own. Might as well do the same for | |
1166 | * all autoconfigured interfaces. | |
1167 | */ | |
1168 | if (dn_db == NULL) { | |
1169 | int err; | |
1170 | dn_db = dn_dev_create(dev, &err); | |
1171 | if (dn_db == NULL) | |
1172 | return; | |
1173 | } | |
1174 | ||
1175 | if (dev->type == ARPHRD_ETHER) { | |
1176 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) | |
1177 | return; | |
c4ea94ab | 1178 | addr = dn_eth2dn(dev->dev_addr); |
1da177e4 LT |
1179 | maybe_default = 1; |
1180 | } | |
1181 | ||
1182 | if (addr == 0) | |
1183 | return; | |
1184 | ||
1185 | if ((ifa = dn_dev_alloc_ifa()) == NULL) | |
1186 | return; | |
1187 | ||
1188 | ifa->ifa_local = ifa->ifa_address = addr; | |
1189 | ifa->ifa_flags = 0; | |
1190 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; | |
1191 | strcpy(ifa->ifa_label, dev->name); | |
1192 | ||
1193 | dn_dev_set_ifa(dev, ifa); | |
1194 | ||
1195 | /* | |
1196 | * Automagically set the default device to the first automatically | |
1197 | * configured ethernet card in the system. | |
1198 | */ | |
1199 | if (maybe_default) { | |
1200 | dev_hold(dev); | |
1201 | if (dn_dev_set_default(dev, 0)) | |
1202 | dev_put(dev); | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | static void dn_dev_delete(struct net_device *dev) | |
1207 | { | |
1208 | struct dn_dev *dn_db = dev->dn_ptr; | |
1209 | ||
1210 | if (dn_db == NULL) | |
1211 | return; | |
1212 | ||
1213 | del_timer_sync(&dn_db->timer); | |
1214 | dn_dev_sysctl_unregister(&dn_db->parms); | |
1215 | dn_dev_check_default(dev); | |
1216 | neigh_ifdown(&dn_neigh_table, dev); | |
1217 | ||
1218 | if (dn_db->parms.down) | |
1219 | dn_db->parms.down(dev); | |
1220 | ||
1221 | dev->dn_ptr = NULL; | |
1222 | ||
1223 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); | |
1224 | neigh_ifdown(&dn_neigh_table, dev); | |
1225 | ||
1226 | if (dn_db->router) | |
1227 | neigh_release(dn_db->router); | |
1228 | if (dn_db->peer) | |
1229 | neigh_release(dn_db->peer); | |
1230 | ||
1231 | kfree(dn_db); | |
1232 | } | |
1233 | ||
1234 | void dn_dev_down(struct net_device *dev) | |
1235 | { | |
1236 | struct dn_dev *dn_db = dev->dn_ptr; | |
1237 | struct dn_ifaddr *ifa; | |
1238 | ||
1239 | if (dn_db == NULL) | |
1240 | return; | |
1241 | ||
1242 | while((ifa = dn_db->ifa_list) != NULL) { | |
1243 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); | |
1244 | dn_dev_free_ifa(ifa); | |
1245 | } | |
1246 | ||
1247 | dn_dev_delete(dev); | |
1248 | } | |
1249 | ||
1250 | void dn_dev_init_pkt(struct sk_buff *skb) | |
1251 | { | |
1252 | return; | |
1253 | } | |
1254 | ||
1255 | void dn_dev_veri_pkt(struct sk_buff *skb) | |
1256 | { | |
1257 | return; | |
1258 | } | |
1259 | ||
1260 | void dn_dev_hello(struct sk_buff *skb) | |
1261 | { | |
1262 | return; | |
1263 | } | |
1264 | ||
1265 | void dn_dev_devices_off(void) | |
1266 | { | |
1267 | struct net_device *dev; | |
1268 | ||
1269 | rtnl_lock(); | |
1270 | for(dev = dev_base; dev; dev = dev->next) | |
1271 | dn_dev_down(dev); | |
1272 | rtnl_unlock(); | |
1273 | ||
1274 | } | |
1275 | ||
1276 | void dn_dev_devices_on(void) | |
1277 | { | |
1278 | struct net_device *dev; | |
1279 | ||
1280 | rtnl_lock(); | |
1281 | for(dev = dev_base; dev; dev = dev->next) { | |
1282 | if (dev->flags & IFF_UP) | |
1283 | dn_dev_up(dev); | |
1284 | } | |
1285 | rtnl_unlock(); | |
1286 | } | |
1287 | ||
1288 | int register_dnaddr_notifier(struct notifier_block *nb) | |
1289 | { | |
e041c683 | 1290 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | int unregister_dnaddr_notifier(struct notifier_block *nb) | |
1294 | { | |
e041c683 | 1295 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | #ifdef CONFIG_PROC_FS | |
1299 | static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev) | |
1300 | { | |
1301 | do { | |
1302 | dev = dev->next; | |
1303 | } while(dev && !dev->dn_ptr); | |
1304 | ||
1305 | return dev; | |
1306 | } | |
1307 | ||
1308 | static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos) | |
1309 | { | |
1310 | struct net_device *dev; | |
1311 | ||
1312 | dev = dev_base; | |
1313 | if (dev && !dev->dn_ptr) | |
1314 | dev = dn_dev_get_next(seq, dev); | |
1315 | if (pos) { | |
1316 | while(dev && (dev = dn_dev_get_next(seq, dev))) | |
1317 | --pos; | |
1318 | } | |
1319 | return dev; | |
1320 | } | |
1321 | ||
1322 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) | |
1323 | { | |
1324 | if (*pos) { | |
1325 | struct net_device *dev; | |
1326 | read_lock(&dev_base_lock); | |
1327 | dev = dn_dev_get_idx(seq, *pos - 1); | |
1328 | if (dev == NULL) | |
1329 | read_unlock(&dev_base_lock); | |
1330 | return dev; | |
1331 | } | |
1332 | return SEQ_START_TOKEN; | |
1333 | } | |
1334 | ||
1335 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1336 | { | |
1337 | struct net_device *dev = v; | |
1338 | loff_t one = 1; | |
1339 | ||
1340 | if (v == SEQ_START_TOKEN) { | |
1341 | dev = dn_dev_seq_start(seq, &one); | |
1342 | } else { | |
1343 | dev = dn_dev_get_next(seq, dev); | |
1344 | if (dev == NULL) | |
1345 | read_unlock(&dev_base_lock); | |
1346 | } | |
1347 | ++*pos; | |
1348 | return dev; | |
1349 | } | |
1350 | ||
1351 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) | |
1352 | { | |
1353 | if (v && v != SEQ_START_TOKEN) | |
1354 | read_unlock(&dev_base_lock); | |
1355 | } | |
1356 | ||
1357 | static char *dn_type2asc(char type) | |
1358 | { | |
1359 | switch(type) { | |
1360 | case DN_DEV_BCAST: | |
1361 | return "B"; | |
1362 | case DN_DEV_UCAST: | |
1363 | return "U"; | |
1364 | case DN_DEV_MPOINT: | |
1365 | return "M"; | |
1366 | } | |
1367 | ||
1368 | return "?"; | |
1369 | } | |
1370 | ||
1371 | static int dn_dev_seq_show(struct seq_file *seq, void *v) | |
1372 | { | |
1373 | if (v == SEQ_START_TOKEN) | |
1374 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); | |
1375 | else { | |
1376 | struct net_device *dev = v; | |
1377 | char peer_buf[DN_ASCBUF_LEN]; | |
1378 | char router_buf[DN_ASCBUF_LEN]; | |
1379 | struct dn_dev *dn_db = dev->dn_ptr; | |
1380 | ||
1381 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" | |
1382 | " %04hu %03d %02x %-10s %-7s %-7s\n", | |
1383 | dev->name ? dev->name : "???", | |
1384 | dn_type2asc(dn_db->parms.mode), | |
1385 | 0, 0, | |
1386 | dn_db->t3, dn_db->parms.t3, | |
1387 | mtu2blksize(dev), | |
1388 | dn_db->parms.priority, | |
1389 | dn_db->parms.state, dn_db->parms.name, | |
c4ea94ab SW |
1390 | dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
1391 | dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); | |
1da177e4 LT |
1392 | } |
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | static struct seq_operations dn_dev_seq_ops = { | |
1397 | .start = dn_dev_seq_start, | |
1398 | .next = dn_dev_seq_next, | |
1399 | .stop = dn_dev_seq_stop, | |
1400 | .show = dn_dev_seq_show, | |
1401 | }; | |
1402 | ||
1403 | static int dn_dev_seq_open(struct inode *inode, struct file *file) | |
1404 | { | |
1405 | return seq_open(file, &dn_dev_seq_ops); | |
1406 | } | |
1407 | ||
1408 | static struct file_operations dn_dev_seq_fops = { | |
1409 | .owner = THIS_MODULE, | |
1410 | .open = dn_dev_seq_open, | |
1411 | .read = seq_read, | |
1412 | .llseek = seq_lseek, | |
1413 | .release = seq_release, | |
1414 | }; | |
1415 | ||
1416 | #endif /* CONFIG_PROC_FS */ | |
1417 | ||
db46edc6 | 1418 | static struct rtnetlink_link dnet_rtnetlink_table[RTM_NR_MSGTYPES] = |
1da177e4 | 1419 | { |
db46edc6 TG |
1420 | [RTM_NEWADDR - RTM_BASE] = { .doit = dn_dev_rtm_newaddr, }, |
1421 | [RTM_DELADDR - RTM_BASE] = { .doit = dn_dev_rtm_deladdr, }, | |
1422 | [RTM_GETADDR - RTM_BASE] = { .dumpit = dn_dev_dump_ifaddr, }, | |
1da177e4 | 1423 | #ifdef CONFIG_DECNET_ROUTER |
db46edc6 TG |
1424 | [RTM_NEWROUTE - RTM_BASE] = { .doit = dn_fib_rtm_newroute, }, |
1425 | [RTM_DELROUTE - RTM_BASE] = { .doit = dn_fib_rtm_delroute, }, | |
1426 | [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute, | |
1427 | .dumpit = dn_fib_dump, }, | |
db46edc6 | 1428 | [RTM_GETRULE - RTM_BASE] = { .dumpit = dn_fib_dump_rules, }, |
1da177e4 | 1429 | #else |
db46edc6 | 1430 | [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute, |
25ae3f59 | 1431 | .dumpit = dn_cache_dump, }, |
1da177e4 LT |
1432 | #endif |
1433 | ||
1434 | }; | |
1435 | ||
1436 | static int __initdata addr[2]; | |
1437 | module_param_array(addr, int, NULL, 0444); | |
1438 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); | |
1439 | ||
1440 | void __init dn_dev_init(void) | |
1441 | { | |
1442 | if (addr[0] > 63 || addr[0] < 0) { | |
1443 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); | |
1444 | return; | |
1445 | } | |
1446 | ||
1447 | if (addr[1] > 1023 || addr[1] < 0) { | |
1448 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); | |
1449 | return; | |
1450 | } | |
1451 | ||
1452 | decnet_address = dn_htons((addr[0] << 10) | addr[1]); | |
1453 | ||
1454 | dn_dev_devices_on(); | |
1455 | ||
1456 | rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table; | |
1457 | ||
1458 | proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops); | |
1459 | ||
1460 | #ifdef CONFIG_SYSCTL | |
1461 | { | |
1462 | int i; | |
1463 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1464 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); | |
1465 | } | |
1466 | #endif /* CONFIG_SYSCTL */ | |
1467 | } | |
1468 | ||
1469 | void __exit dn_dev_cleanup(void) | |
1470 | { | |
1471 | rtnetlink_links[PF_DECnet] = NULL; | |
1472 | ||
1473 | #ifdef CONFIG_SYSCTL | |
1474 | { | |
1475 | int i; | |
1476 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) | |
1477 | dn_dev_sysctl_unregister(&dn_dev_list[i]); | |
1478 | } | |
1479 | #endif /* CONFIG_SYSCTL */ | |
1480 | ||
1481 | proc_net_remove("decnet_dev"); | |
1482 | ||
1483 | dn_dev_devices_off(); | |
1484 | } |