Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * DECnet An implementation of the DECnet protocol suite for the LINUX | |
3 | * operating system. DECnet is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * DECnet Routing Functions (Endnode and Router) | |
7 | * | |
8 | * Authors: Steve Whitehouse <SteveW@ACM.org> | |
9 | * Eduardo Marcelo Serrat <emserrat@geocities.com> | |
10 | * | |
11 | * Changes: | |
12 | * Steve Whitehouse : Fixes to allow "intra-ethernet" and | |
13 | * "return-to-sender" bits on outgoing | |
14 | * packets. | |
15 | * Steve Whitehouse : Timeouts for cached routes. | |
16 | * Steve Whitehouse : Use dst cache for input routes too. | |
17 | * Steve Whitehouse : Fixed error values in dn_send_skb. | |
18 | * Steve Whitehouse : Rework routing functions to better fit | |
19 | * DECnet routing design | |
20 | * Alexey Kuznetsov : New SMP locking | |
21 | * Steve Whitehouse : More SMP locking changes & dn_cache_dump() | |
22 | * Steve Whitehouse : Prerouting NF hook, now really is prerouting. | |
23 | * Fixed possible skb leak in rtnetlink funcs. | |
24 | * Steve Whitehouse : Dave Miller's dynamic hash table sizing and | |
25 | * Alexey Kuznetsov's finer grained locking | |
26 | * from ipv4/route.c. | |
27 | * Steve Whitehouse : Routing is now starting to look like a | |
28 | * sensible set of code now, mainly due to | |
29 | * my copying the IPv4 routing code. The | |
30 | * hooks here are modified and will continue | |
31 | * to evolve for a while. | |
32 | * Steve Whitehouse : Real SMP at last :-) Also new netfilter | |
33 | * stuff. Look out raw sockets your days | |
34 | * are numbered! | |
35 | * Steve Whitehouse : Added return-to-sender functions. Added | |
36 | * backlog congestion level return codes. | |
37 | * Steve Whitehouse : Fixed bug where routes were set up with | |
38 | * no ref count on net devices. | |
39 | * Steve Whitehouse : RCU for the route cache | |
40 | * Steve Whitehouse : Preparations for the flow cache | |
41 | * Steve Whitehouse : Prepare for nonlinear skbs | |
42 | */ | |
43 | ||
44 | /****************************************************************************** | |
45 | (c) 1995-1998 E.M. Serrat emserrat@geocities.com | |
429eb0fa | 46 | |
1da177e4 LT |
47 | This program is free software; you can redistribute it and/or modify |
48 | it under the terms of the GNU General Public License as published by | |
49 | the Free Software Foundation; either version 2 of the License, or | |
50 | any later version. | |
51 | ||
52 | This program is distributed in the hope that it will be useful, | |
53 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
54 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
55 | GNU General Public License for more details. | |
56 | *******************************************************************************/ | |
57 | ||
1da177e4 LT |
58 | #include <linux/errno.h> |
59 | #include <linux/types.h> | |
60 | #include <linux/socket.h> | |
61 | #include <linux/in.h> | |
62 | #include <linux/kernel.h> | |
63 | #include <linux/sockios.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/netdevice.h> | |
66 | #include <linux/inet.h> | |
67 | #include <linux/route.h> | |
68 | #include <linux/in_route.h> | |
5a0e3ad6 | 69 | #include <linux/slab.h> |
1da177e4 LT |
70 | #include <net/sock.h> |
71 | #include <linux/mm.h> | |
72 | #include <linux/proc_fs.h> | |
73 | #include <linux/seq_file.h> | |
74 | #include <linux/init.h> | |
75 | #include <linux/rtnetlink.h> | |
76 | #include <linux/string.h> | |
77 | #include <linux/netfilter_decnet.h> | |
78 | #include <linux/rcupdate.h> | |
79 | #include <linux/times.h> | |
bc3b2d7f | 80 | #include <linux/export.h> |
1da177e4 | 81 | #include <asm/errno.h> |
457c4cbc | 82 | #include <net/net_namespace.h> |
dc5fc579 | 83 | #include <net/netlink.h> |
1da177e4 LT |
84 | #include <net/neighbour.h> |
85 | #include <net/dst.h> | |
86 | #include <net/flow.h> | |
a8731cbf | 87 | #include <net/fib_rules.h> |
1da177e4 LT |
88 | #include <net/dn.h> |
89 | #include <net/dn_dev.h> | |
90 | #include <net/dn_nsp.h> | |
91 | #include <net/dn_route.h> | |
92 | #include <net/dn_neigh.h> | |
93 | #include <net/dn_fib.h> | |
94 | ||
95 | struct dn_rt_hash_bucket | |
96 | { | |
fc766e4c | 97 | struct dn_route __rcu *chain; |
1da177e4 | 98 | spinlock_t lock; |
fca09fb7 | 99 | }; |
1da177e4 LT |
100 | |
101 | extern struct neigh_table dn_neigh_table; | |
102 | ||
103 | ||
104 | static unsigned char dn_hiord_addr[6] = {0xAA,0x00,0x04,0x00,0x00,0x00}; | |
105 | ||
106 | static const int dn_rt_min_delay = 2 * HZ; | |
107 | static const int dn_rt_max_delay = 10 * HZ; | |
108 | static const int dn_rt_mtu_expires = 10 * 60 * HZ; | |
109 | ||
110 | static unsigned long dn_rt_deadline; | |
111 | ||
569d3645 | 112 | static int dn_dst_gc(struct dst_ops *ops); |
1da177e4 | 113 | static struct dst_entry *dn_dst_check(struct dst_entry *, __u32); |
0dbaee3b | 114 | static unsigned int dn_dst_default_advmss(const struct dst_entry *dst); |
ebb762f2 | 115 | static unsigned int dn_dst_mtu(const struct dst_entry *dst); |
62fa8a84 | 116 | static void dn_dst_destroy(struct dst_entry *); |
fccd7d5c | 117 | static void dn_dst_ifdown(struct dst_entry *, struct net_device *dev, int how); |
1da177e4 LT |
118 | static struct dst_entry *dn_dst_negative_advice(struct dst_entry *); |
119 | static void dn_dst_link_failure(struct sk_buff *); | |
6700c270 DM |
120 | static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk, |
121 | struct sk_buff *skb , u32 mtu); | |
122 | static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk, | |
123 | struct sk_buff *skb); | |
f894cbf8 DM |
124 | static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, |
125 | struct sk_buff *skb, | |
126 | const void *daddr); | |
1da177e4 LT |
127 | static int dn_route_input(struct sk_buff *); |
128 | static void dn_run_flush(unsigned long dummy); | |
129 | ||
130 | static struct dn_rt_hash_bucket *dn_rt_hash_table; | |
95c96174 | 131 | static unsigned int dn_rt_hash_mask; |
1da177e4 LT |
132 | |
133 | static struct timer_list dn_route_timer; | |
8d06afab | 134 | static DEFINE_TIMER(dn_rt_flush_timer, dn_run_flush, 0, 0); |
1da177e4 LT |
135 | int decnet_dst_gc_interval = 2; |
136 | ||
137 | static struct dst_ops dn_dst_ops = { | |
138 | .family = PF_DECnet, | |
09640e63 | 139 | .protocol = cpu_to_be16(ETH_P_DNA_RT), |
1da177e4 LT |
140 | .gc_thresh = 128, |
141 | .gc = dn_dst_gc, | |
142 | .check = dn_dst_check, | |
0dbaee3b | 143 | .default_advmss = dn_dst_default_advmss, |
ebb762f2 | 144 | .mtu = dn_dst_mtu, |
62fa8a84 DM |
145 | .cow_metrics = dst_cow_metrics_generic, |
146 | .destroy = dn_dst_destroy, | |
fccd7d5c | 147 | .ifdown = dn_dst_ifdown, |
1da177e4 LT |
148 | .negative_advice = dn_dst_negative_advice, |
149 | .link_failure = dn_dst_link_failure, | |
150 | .update_pmtu = dn_dst_update_pmtu, | |
b587ee3b | 151 | .redirect = dn_dst_redirect, |
d3aaeb38 | 152 | .neigh_lookup = dn_dst_neigh_lookup, |
1da177e4 LT |
153 | }; |
154 | ||
62fa8a84 DM |
155 | static void dn_dst_destroy(struct dst_entry *dst) |
156 | { | |
fccd7d5c DM |
157 | struct dn_route *rt = (struct dn_route *) dst; |
158 | ||
159 | if (rt->n) | |
160 | neigh_release(rt->n); | |
62fa8a84 DM |
161 | dst_destroy_metrics_generic(dst); |
162 | } | |
163 | ||
fccd7d5c DM |
164 | static void dn_dst_ifdown(struct dst_entry *dst, struct net_device *dev, int how) |
165 | { | |
166 | if (how) { | |
167 | struct dn_route *rt = (struct dn_route *) dst; | |
168 | struct neighbour *n = rt->n; | |
169 | ||
170 | if (n && n->dev == dev) { | |
171 | n->dev = dev_net(dev)->loopback_dev; | |
172 | dev_hold(n->dev); | |
173 | dev_put(dev); | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
95c96174 | 178 | static __inline__ unsigned int dn_hash(__le16 src, __le16 dst) |
1da177e4 | 179 | { |
c4ea94ab | 180 | __u16 tmp = (__u16 __force)(src ^ dst); |
1da177e4 LT |
181 | tmp ^= (tmp >> 3); |
182 | tmp ^= (tmp >> 5); | |
183 | tmp ^= (tmp >> 10); | |
95c96174 | 184 | return dn_rt_hash_mask & (unsigned int)tmp; |
1da177e4 LT |
185 | } |
186 | ||
187 | static inline void dnrt_free(struct dn_route *rt) | |
188 | { | |
d8d1f30b | 189 | call_rcu_bh(&rt->dst.rcu_head, dst_rcu_free); |
1da177e4 LT |
190 | } |
191 | ||
192 | static inline void dnrt_drop(struct dn_route *rt) | |
193 | { | |
d8d1f30b CG |
194 | dst_release(&rt->dst); |
195 | call_rcu_bh(&rt->dst.rcu_head, dst_rcu_free); | |
1da177e4 LT |
196 | } |
197 | ||
198 | static void dn_dst_check_expire(unsigned long dummy) | |
199 | { | |
200 | int i; | |
fc766e4c ED |
201 | struct dn_route *rt; |
202 | struct dn_route __rcu **rtp; | |
1da177e4 LT |
203 | unsigned long now = jiffies; |
204 | unsigned long expire = 120 * HZ; | |
205 | ||
fc766e4c | 206 | for (i = 0; i <= dn_rt_hash_mask; i++) { |
1da177e4 LT |
207 | rtp = &dn_rt_hash_table[i].chain; |
208 | ||
209 | spin_lock(&dn_rt_hash_table[i].lock); | |
fc766e4c ED |
210 | while ((rt = rcu_dereference_protected(*rtp, |
211 | lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) { | |
d8d1f30b CG |
212 | if (atomic_read(&rt->dst.__refcnt) || |
213 | (now - rt->dst.lastuse) < expire) { | |
214 | rtp = &rt->dst.dn_next; | |
1da177e4 LT |
215 | continue; |
216 | } | |
d8d1f30b CG |
217 | *rtp = rt->dst.dn_next; |
218 | rt->dst.dn_next = NULL; | |
1da177e4 LT |
219 | dnrt_free(rt); |
220 | } | |
221 | spin_unlock(&dn_rt_hash_table[i].lock); | |
222 | ||
223 | if ((jiffies - now) > 0) | |
224 | break; | |
225 | } | |
226 | ||
227 | mod_timer(&dn_route_timer, now + decnet_dst_gc_interval * HZ); | |
228 | } | |
229 | ||
569d3645 | 230 | static int dn_dst_gc(struct dst_ops *ops) |
1da177e4 | 231 | { |
fc766e4c ED |
232 | struct dn_route *rt; |
233 | struct dn_route __rcu **rtp; | |
1da177e4 LT |
234 | int i; |
235 | unsigned long now = jiffies; | |
236 | unsigned long expire = 10 * HZ; | |
237 | ||
fc766e4c | 238 | for (i = 0; i <= dn_rt_hash_mask; i++) { |
1da177e4 LT |
239 | |
240 | spin_lock_bh(&dn_rt_hash_table[i].lock); | |
241 | rtp = &dn_rt_hash_table[i].chain; | |
242 | ||
fc766e4c ED |
243 | while ((rt = rcu_dereference_protected(*rtp, |
244 | lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) { | |
d8d1f30b CG |
245 | if (atomic_read(&rt->dst.__refcnt) || |
246 | (now - rt->dst.lastuse) < expire) { | |
247 | rtp = &rt->dst.dn_next; | |
1da177e4 LT |
248 | continue; |
249 | } | |
d8d1f30b CG |
250 | *rtp = rt->dst.dn_next; |
251 | rt->dst.dn_next = NULL; | |
1da177e4 LT |
252 | dnrt_drop(rt); |
253 | break; | |
254 | } | |
255 | spin_unlock_bh(&dn_rt_hash_table[i].lock); | |
256 | } | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | /* | |
262 | * The decnet standards don't impose a particular minimum mtu, what they | |
263 | * do insist on is that the routing layer accepts a datagram of at least | |
264 | * 230 bytes long. Here we have to subtract the routing header length from | |
265 | * 230 to get the minimum acceptable mtu. If there is no neighbour, then we | |
266 | * assume the worst and use a long header size. | |
267 | * | |
268 | * We update both the mtu and the advertised mss (i.e. the segment size we | |
269 | * advertise to the other end). | |
270 | */ | |
6700c270 DM |
271 | static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk, |
272 | struct sk_buff *skb, u32 mtu) | |
1da177e4 | 273 | { |
fccd7d5c DM |
274 | struct dn_route *rt = (struct dn_route *) dst; |
275 | struct neighbour *n = rt->n; | |
1da177e4 | 276 | u32 min_mtu = 230; |
69cce1d1 DM |
277 | struct dn_dev *dn; |
278 | ||
279 | dn = n ? rcu_dereference_raw(n->dev->dn_ptr) : NULL; | |
1da177e4 LT |
280 | |
281 | if (dn && dn->use_long == 0) | |
282 | min_mtu -= 6; | |
283 | else | |
284 | min_mtu -= 21; | |
285 | ||
5ffc02a1 | 286 | if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= min_mtu) { |
1da177e4 | 287 | if (!(dst_metric_locked(dst, RTAX_MTU))) { |
defb3519 | 288 | dst_metric_set(dst, RTAX_MTU, mtu); |
1da177e4 LT |
289 | dst_set_expires(dst, dn_rt_mtu_expires); |
290 | } | |
291 | if (!(dst_metric_locked(dst, RTAX_ADVMSS))) { | |
292 | u32 mss = mtu - DN_MAX_NSP_DATA_HEADER; | |
0dbaee3b DM |
293 | u32 existing_mss = dst_metric_raw(dst, RTAX_ADVMSS); |
294 | if (!existing_mss || existing_mss > mss) | |
defb3519 | 295 | dst_metric_set(dst, RTAX_ADVMSS, mss); |
1da177e4 LT |
296 | } |
297 | } | |
298 | } | |
299 | ||
6700c270 DM |
300 | static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk, |
301 | struct sk_buff *skb) | |
b587ee3b DM |
302 | { |
303 | } | |
304 | ||
429eb0fa | 305 | /* |
1da177e4 LT |
306 | * When a route has been marked obsolete. (e.g. routing cache flush) |
307 | */ | |
308 | static struct dst_entry *dn_dst_check(struct dst_entry *dst, __u32 cookie) | |
309 | { | |
310 | return NULL; | |
311 | } | |
312 | ||
313 | static struct dst_entry *dn_dst_negative_advice(struct dst_entry *dst) | |
314 | { | |
315 | dst_release(dst); | |
316 | return NULL; | |
317 | } | |
318 | ||
319 | static void dn_dst_link_failure(struct sk_buff *skb) | |
320 | { | |
1da177e4 LT |
321 | } |
322 | ||
bef55aeb | 323 | static inline int compare_keys(struct flowidn *fl1, struct flowidn *fl2) |
1da177e4 | 324 | { |
bef55aeb DM |
325 | return ((fl1->daddr ^ fl2->daddr) | |
326 | (fl1->saddr ^ fl2->saddr) | | |
327 | (fl1->flowidn_mark ^ fl2->flowidn_mark) | | |
328 | (fl1->flowidn_scope ^ fl2->flowidn_scope) | | |
329 | (fl1->flowidn_oif ^ fl2->flowidn_oif) | | |
330 | (fl1->flowidn_iif ^ fl2->flowidn_iif)) == 0; | |
1da177e4 LT |
331 | } |
332 | ||
95c96174 | 333 | static int dn_insert_route(struct dn_route *rt, unsigned int hash, struct dn_route **rp) |
1da177e4 | 334 | { |
fc766e4c ED |
335 | struct dn_route *rth; |
336 | struct dn_route __rcu **rthp; | |
1da177e4 LT |
337 | unsigned long now = jiffies; |
338 | ||
339 | rthp = &dn_rt_hash_table[hash].chain; | |
340 | ||
341 | spin_lock_bh(&dn_rt_hash_table[hash].lock); | |
fc766e4c ED |
342 | while ((rth = rcu_dereference_protected(*rthp, |
343 | lockdep_is_held(&dn_rt_hash_table[hash].lock))) != NULL) { | |
bef55aeb | 344 | if (compare_keys(&rth->fld, &rt->fld)) { |
1da177e4 | 345 | /* Put it first */ |
d8d1f30b CG |
346 | *rthp = rth->dst.dn_next; |
347 | rcu_assign_pointer(rth->dst.dn_next, | |
1da177e4 LT |
348 | dn_rt_hash_table[hash].chain); |
349 | rcu_assign_pointer(dn_rt_hash_table[hash].chain, rth); | |
350 | ||
d8d1f30b | 351 | dst_use(&rth->dst, now); |
1da177e4 LT |
352 | spin_unlock_bh(&dn_rt_hash_table[hash].lock); |
353 | ||
354 | dnrt_drop(rt); | |
355 | *rp = rth; | |
356 | return 0; | |
357 | } | |
d8d1f30b | 358 | rthp = &rth->dst.dn_next; |
1da177e4 LT |
359 | } |
360 | ||
d8d1f30b | 361 | rcu_assign_pointer(rt->dst.dn_next, dn_rt_hash_table[hash].chain); |
1da177e4 | 362 | rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt); |
429eb0fa | 363 | |
d8d1f30b | 364 | dst_use(&rt->dst, now); |
1da177e4 LT |
365 | spin_unlock_bh(&dn_rt_hash_table[hash].lock); |
366 | *rp = rt; | |
367 | return 0; | |
368 | } | |
369 | ||
5eaa65b2 | 370 | static void dn_run_flush(unsigned long dummy) |
1da177e4 LT |
371 | { |
372 | int i; | |
373 | struct dn_route *rt, *next; | |
374 | ||
fc766e4c | 375 | for (i = 0; i < dn_rt_hash_mask; i++) { |
1da177e4 LT |
376 | spin_lock_bh(&dn_rt_hash_table[i].lock); |
377 | ||
fc766e4c | 378 | if ((rt = xchg((struct dn_route **)&dn_rt_hash_table[i].chain, NULL)) == NULL) |
1da177e4 LT |
379 | goto nothing_to_declare; |
380 | ||
fc766e4c ED |
381 | for(; rt; rt = next) { |
382 | next = rcu_dereference_raw(rt->dst.dn_next); | |
383 | RCU_INIT_POINTER(rt->dst.dn_next, NULL); | |
1da177e4 LT |
384 | dst_free((struct dst_entry *)rt); |
385 | } | |
386 | ||
387 | nothing_to_declare: | |
388 | spin_unlock_bh(&dn_rt_hash_table[i].lock); | |
389 | } | |
390 | } | |
391 | ||
392 | static DEFINE_SPINLOCK(dn_rt_flush_lock); | |
393 | ||
394 | void dn_rt_cache_flush(int delay) | |
395 | { | |
396 | unsigned long now = jiffies; | |
397 | int user_mode = !in_interrupt(); | |
398 | ||
399 | if (delay < 0) | |
400 | delay = dn_rt_min_delay; | |
401 | ||
402 | spin_lock_bh(&dn_rt_flush_lock); | |
403 | ||
404 | if (del_timer(&dn_rt_flush_timer) && delay > 0 && dn_rt_deadline) { | |
405 | long tmo = (long)(dn_rt_deadline - now); | |
406 | ||
407 | if (user_mode && tmo < dn_rt_max_delay - dn_rt_min_delay) | |
408 | tmo = 0; | |
409 | ||
410 | if (delay > tmo) | |
411 | delay = tmo; | |
412 | } | |
413 | ||
414 | if (delay <= 0) { | |
415 | spin_unlock_bh(&dn_rt_flush_lock); | |
416 | dn_run_flush(0); | |
417 | return; | |
418 | } | |
419 | ||
420 | if (dn_rt_deadline == 0) | |
421 | dn_rt_deadline = now + dn_rt_max_delay; | |
422 | ||
423 | dn_rt_flush_timer.expires = now + delay; | |
424 | add_timer(&dn_rt_flush_timer); | |
425 | spin_unlock_bh(&dn_rt_flush_lock); | |
426 | } | |
427 | ||
428 | /** | |
429 | * dn_return_short - Return a short packet to its sender | |
430 | * @skb: The packet to return | |
431 | * | |
432 | */ | |
433 | static int dn_return_short(struct sk_buff *skb) | |
434 | { | |
435 | struct dn_skb_cb *cb; | |
436 | unsigned char *ptr; | |
c4ea94ab SW |
437 | __le16 *src; |
438 | __le16 *dst; | |
1da177e4 LT |
439 | |
440 | /* Add back headers */ | |
d56f90a7 | 441 | skb_push(skb, skb->data - skb_network_header(skb)); |
1da177e4 LT |
442 | |
443 | if ((skb = skb_unshare(skb, GFP_ATOMIC)) == NULL) | |
444 | return NET_RX_DROP; | |
445 | ||
446 | cb = DN_SKB_CB(skb); | |
447 | /* Skip packet length and point to flags */ | |
448 | ptr = skb->data + 2; | |
449 | *ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS; | |
450 | ||
c4ea94ab | 451 | dst = (__le16 *)ptr; |
1da177e4 | 452 | ptr += 2; |
c4ea94ab | 453 | src = (__le16 *)ptr; |
1da177e4 LT |
454 | ptr += 2; |
455 | *ptr = 0; /* Zero hop count */ | |
456 | ||
a0bffffc | 457 | swap(*src, *dst); |
1da177e4 LT |
458 | |
459 | skb->pkt_type = PACKET_OUTGOING; | |
460 | dn_rt_finish_output(skb, NULL, NULL); | |
461 | return NET_RX_SUCCESS; | |
462 | } | |
463 | ||
464 | /** | |
465 | * dn_return_long - Return a long packet to its sender | |
466 | * @skb: The long format packet to return | |
467 | * | |
468 | */ | |
469 | static int dn_return_long(struct sk_buff *skb) | |
470 | { | |
471 | struct dn_skb_cb *cb; | |
472 | unsigned char *ptr; | |
473 | unsigned char *src_addr, *dst_addr; | |
474 | unsigned char tmp[ETH_ALEN]; | |
475 | ||
476 | /* Add back all headers */ | |
d56f90a7 | 477 | skb_push(skb, skb->data - skb_network_header(skb)); |
1da177e4 LT |
478 | |
479 | if ((skb = skb_unshare(skb, GFP_ATOMIC)) == NULL) | |
480 | return NET_RX_DROP; | |
481 | ||
482 | cb = DN_SKB_CB(skb); | |
483 | /* Ignore packet length and point to flags */ | |
484 | ptr = skb->data + 2; | |
485 | ||
486 | /* Skip padding */ | |
487 | if (*ptr & DN_RT_F_PF) { | |
488 | char padlen = (*ptr & ~DN_RT_F_PF); | |
489 | ptr += padlen; | |
490 | } | |
491 | ||
492 | *ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS; | |
493 | ptr += 2; | |
494 | dst_addr = ptr; | |
495 | ptr += 8; | |
496 | src_addr = ptr; | |
497 | ptr += 6; | |
498 | *ptr = 0; /* Zero hop count */ | |
499 | ||
500 | /* Swap source and destination */ | |
501 | memcpy(tmp, src_addr, ETH_ALEN); | |
502 | memcpy(src_addr, dst_addr, ETH_ALEN); | |
503 | memcpy(dst_addr, tmp, ETH_ALEN); | |
504 | ||
505 | skb->pkt_type = PACKET_OUTGOING; | |
506 | dn_rt_finish_output(skb, dst_addr, src_addr); | |
507 | return NET_RX_SUCCESS; | |
508 | } | |
509 | ||
510 | /** | |
511 | * dn_route_rx_packet - Try and find a route for an incoming packet | |
512 | * @skb: The packet to find a route for | |
513 | * | |
514 | * Returns: result of input function if route is found, error code otherwise | |
515 | */ | |
516 | static int dn_route_rx_packet(struct sk_buff *skb) | |
517 | { | |
fc766e4c | 518 | struct dn_skb_cb *cb; |
1da177e4 LT |
519 | int err; |
520 | ||
521 | if ((err = dn_route_input(skb)) == 0) | |
522 | return dst_input(skb); | |
523 | ||
fc766e4c | 524 | cb = DN_SKB_CB(skb); |
1da177e4 LT |
525 | if (decnet_debug_level & 4) { |
526 | char *devname = skb->dev ? skb->dev->name : "???"; | |
fc766e4c | 527 | |
1da177e4 LT |
528 | printk(KERN_DEBUG |
529 | "DECnet: dn_route_rx_packet: rt_flags=0x%02x dev=%s len=%d src=0x%04hx dst=0x%04hx err=%d type=%d\n", | |
c4ea94ab | 530 | (int)cb->rt_flags, devname, skb->len, |
c4106aa8 | 531 | le16_to_cpu(cb->src), le16_to_cpu(cb->dst), |
1da177e4 LT |
532 | err, skb->pkt_type); |
533 | } | |
534 | ||
535 | if ((skb->pkt_type == PACKET_HOST) && (cb->rt_flags & DN_RT_F_RQR)) { | |
06f8fe11 JP |
536 | switch (cb->rt_flags & DN_RT_PKT_MSK) { |
537 | case DN_RT_PKT_SHORT: | |
538 | return dn_return_short(skb); | |
539 | case DN_RT_PKT_LONG: | |
540 | return dn_return_long(skb); | |
1da177e4 LT |
541 | } |
542 | } | |
543 | ||
544 | kfree_skb(skb); | |
545 | return NET_RX_DROP; | |
546 | } | |
547 | ||
548 | static int dn_route_rx_long(struct sk_buff *skb) | |
549 | { | |
550 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
551 | unsigned char *ptr = skb->data; | |
552 | ||
553 | if (!pskb_may_pull(skb, 21)) /* 20 for long header, 1 for shortest nsp */ | |
554 | goto drop_it; | |
555 | ||
556 | skb_pull(skb, 20); | |
badff6d0 | 557 | skb_reset_transport_header(skb); |
1da177e4 | 558 | |
429eb0fa YH |
559 | /* Destination info */ |
560 | ptr += 2; | |
c4ea94ab | 561 | cb->dst = dn_eth2dn(ptr); |
429eb0fa YH |
562 | if (memcmp(ptr, dn_hiord_addr, 4) != 0) |
563 | goto drop_it; | |
564 | ptr += 6; | |
1da177e4 LT |
565 | |
566 | ||
429eb0fa YH |
567 | /* Source info */ |
568 | ptr += 2; | |
c4ea94ab | 569 | cb->src = dn_eth2dn(ptr); |
429eb0fa YH |
570 | if (memcmp(ptr, dn_hiord_addr, 4) != 0) |
571 | goto drop_it; | |
572 | ptr += 6; | |
573 | /* Other junk */ | |
574 | ptr++; | |
575 | cb->hops = *ptr++; /* Visit Count */ | |
1da177e4 | 576 | |
5d877d87 JE |
577 | return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING, skb, skb->dev, NULL, |
578 | dn_route_rx_packet); | |
1da177e4 LT |
579 | |
580 | drop_it: | |
581 | kfree_skb(skb); | |
582 | return NET_RX_DROP; | |
583 | } | |
584 | ||
585 | ||
586 | ||
587 | static int dn_route_rx_short(struct sk_buff *skb) | |
588 | { | |
589 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
590 | unsigned char *ptr = skb->data; | |
591 | ||
592 | if (!pskb_may_pull(skb, 6)) /* 5 for short header + 1 for shortest nsp */ | |
593 | goto drop_it; | |
594 | ||
595 | skb_pull(skb, 5); | |
badff6d0 | 596 | skb_reset_transport_header(skb); |
1da177e4 | 597 | |
c4ea94ab | 598 | cb->dst = *(__le16 *)ptr; |
429eb0fa YH |
599 | ptr += 2; |
600 | cb->src = *(__le16 *)ptr; | |
601 | ptr += 2; | |
602 | cb->hops = *ptr & 0x3f; | |
1da177e4 | 603 | |
5d877d87 JE |
604 | return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING, skb, skb->dev, NULL, |
605 | dn_route_rx_packet); | |
1da177e4 LT |
606 | |
607 | drop_it: | |
429eb0fa YH |
608 | kfree_skb(skb); |
609 | return NET_RX_DROP; | |
1da177e4 LT |
610 | } |
611 | ||
612 | static int dn_route_discard(struct sk_buff *skb) | |
613 | { | |
614 | /* | |
615 | * I know we drop the packet here, but thats considered success in | |
616 | * this case | |
617 | */ | |
618 | kfree_skb(skb); | |
619 | return NET_RX_SUCCESS; | |
620 | } | |
621 | ||
622 | static int dn_route_ptp_hello(struct sk_buff *skb) | |
623 | { | |
624 | dn_dev_hello(skb); | |
625 | dn_neigh_pointopoint_hello(skb); | |
626 | return NET_RX_SUCCESS; | |
627 | } | |
628 | ||
f2ccd8fa | 629 | int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
630 | { |
631 | struct dn_skb_cb *cb; | |
632 | unsigned char flags = 0; | |
c4106aa8 | 633 | __u16 len = le16_to_cpu(*(__le16 *)skb->data); |
fc766e4c | 634 | struct dn_dev *dn = rcu_dereference(dev->dn_ptr); |
1da177e4 LT |
635 | unsigned char padlen = 0; |
636 | ||
721499e8 | 637 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
638 | goto dump_it; |
639 | ||
1da177e4 LT |
640 | if (dn == NULL) |
641 | goto dump_it; | |
642 | ||
643 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
644 | goto out; | |
645 | ||
646 | if (!pskb_may_pull(skb, 3)) | |
647 | goto dump_it; | |
648 | ||
649 | skb_pull(skb, 2); | |
650 | ||
651 | if (len > skb->len) | |
652 | goto dump_it; | |
653 | ||
654 | skb_trim(skb, len); | |
655 | ||
656 | flags = *skb->data; | |
657 | ||
658 | cb = DN_SKB_CB(skb); | |
659 | cb->stamp = jiffies; | |
660 | cb->iif = dev->ifindex; | |
661 | ||
662 | /* | |
663 | * If we have padding, remove it. | |
664 | */ | |
665 | if (flags & DN_RT_F_PF) { | |
666 | padlen = flags & ~DN_RT_F_PF; | |
667 | if (!pskb_may_pull(skb, padlen + 1)) | |
668 | goto dump_it; | |
669 | skb_pull(skb, padlen); | |
670 | flags = *skb->data; | |
671 | } | |
672 | ||
c1d2bbe1 | 673 | skb_reset_network_header(skb); |
1da177e4 LT |
674 | |
675 | /* | |
676 | * Weed out future version DECnet | |
677 | */ | |
678 | if (flags & DN_RT_F_VER) | |
679 | goto dump_it; | |
680 | ||
681 | cb->rt_flags = flags; | |
682 | ||
683 | if (decnet_debug_level & 1) | |
429eb0fa | 684 | printk(KERN_DEBUG |
1da177e4 | 685 | "dn_route_rcv: got 0x%02x from %s [%d %d %d]\n", |
429eb0fa | 686 | (int)flags, (dev) ? dev->name : "???", len, skb->len, |
1da177e4 LT |
687 | padlen); |
688 | ||
429eb0fa | 689 | if (flags & DN_RT_PKT_CNTL) { |
364c6bad | 690 | if (unlikely(skb_linearize(skb))) |
1da177e4 LT |
691 | goto dump_it; |
692 | ||
06f8fe11 JP |
693 | switch (flags & DN_RT_CNTL_MSK) { |
694 | case DN_RT_PKT_INIT: | |
695 | dn_dev_init_pkt(skb); | |
696 | break; | |
697 | case DN_RT_PKT_VERI: | |
698 | dn_dev_veri_pkt(skb); | |
699 | break; | |
1da177e4 LT |
700 | } |
701 | ||
702 | if (dn->parms.state != DN_DEV_S_RU) | |
703 | goto dump_it; | |
704 | ||
06f8fe11 JP |
705 | switch (flags & DN_RT_CNTL_MSK) { |
706 | case DN_RT_PKT_HELO: | |
707 | return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO, | |
708 | skb, skb->dev, NULL, | |
709 | dn_route_ptp_hello); | |
710 | ||
711 | case DN_RT_PKT_L1RT: | |
712 | case DN_RT_PKT_L2RT: | |
713 | return NF_HOOK(NFPROTO_DECNET, NF_DN_ROUTE, | |
714 | skb, skb->dev, NULL, | |
715 | dn_route_discard); | |
716 | case DN_RT_PKT_ERTH: | |
717 | return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO, | |
718 | skb, skb->dev, NULL, | |
719 | dn_neigh_router_hello); | |
720 | ||
721 | case DN_RT_PKT_EEDH: | |
722 | return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO, | |
723 | skb, skb->dev, NULL, | |
724 | dn_neigh_endnode_hello); | |
429eb0fa YH |
725 | } |
726 | } else { | |
1da177e4 LT |
727 | if (dn->parms.state != DN_DEV_S_RU) |
728 | goto dump_it; | |
729 | ||
730 | skb_pull(skb, 1); /* Pull flags */ | |
731 | ||
06f8fe11 JP |
732 | switch (flags & DN_RT_PKT_MSK) { |
733 | case DN_RT_PKT_LONG: | |
734 | return dn_route_rx_long(skb); | |
735 | case DN_RT_PKT_SHORT: | |
736 | return dn_route_rx_short(skb); | |
1da177e4 | 737 | } |
429eb0fa | 738 | } |
1da177e4 LT |
739 | |
740 | dump_it: | |
741 | kfree_skb(skb); | |
742 | out: | |
743 | return NET_RX_DROP; | |
744 | } | |
745 | ||
8f40b161 DM |
746 | static int dn_to_neigh_output(struct sk_buff *skb) |
747 | { | |
748 | struct dst_entry *dst = skb_dst(skb); | |
fccd7d5c DM |
749 | struct dn_route *rt = (struct dn_route *) dst; |
750 | struct neighbour *n = rt->n; | |
8f40b161 DM |
751 | |
752 | return n->output(n, skb); | |
753 | } | |
754 | ||
1da177e4 LT |
755 | static int dn_output(struct sk_buff *skb) |
756 | { | |
adf30907 | 757 | struct dst_entry *dst = skb_dst(skb); |
1da177e4 LT |
758 | struct dn_route *rt = (struct dn_route *)dst; |
759 | struct net_device *dev = dst->dev; | |
760 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
1da177e4 LT |
761 | |
762 | int err = -EINVAL; | |
763 | ||
fccd7d5c | 764 | if (rt->n == NULL) |
1da177e4 LT |
765 | goto error; |
766 | ||
767 | skb->dev = dev; | |
768 | ||
769 | cb->src = rt->rt_saddr; | |
770 | cb->dst = rt->rt_daddr; | |
771 | ||
772 | /* | |
773 | * Always set the Intra-Ethernet bit on all outgoing packets | |
774 | * originated on this node. Only valid flag from upper layers | |
775 | * is return-to-sender-requested. Set hop count to 0 too. | |
776 | */ | |
777 | cb->rt_flags &= ~DN_RT_F_RQR; | |
778 | cb->rt_flags |= DN_RT_F_IE; | |
779 | cb->hops = 0; | |
780 | ||
5d877d87 | 781 | return NF_HOOK(NFPROTO_DECNET, NF_DN_LOCAL_OUT, skb, NULL, dev, |
8f40b161 | 782 | dn_to_neigh_output); |
1da177e4 LT |
783 | |
784 | error: | |
e87cc472 | 785 | net_dbg_ratelimited("dn_output: This should not happen\n"); |
1da177e4 LT |
786 | |
787 | kfree_skb(skb); | |
788 | ||
789 | return err; | |
790 | } | |
791 | ||
792 | static int dn_forward(struct sk_buff *skb) | |
793 | { | |
794 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
adf30907 | 795 | struct dst_entry *dst = skb_dst(skb); |
fc766e4c | 796 | struct dn_dev *dn_db = rcu_dereference(dst->dev->dn_ptr); |
1da177e4 | 797 | struct dn_route *rt; |
1da177e4 LT |
798 | int header_len; |
799 | #ifdef CONFIG_NETFILTER | |
800 | struct net_device *dev = skb->dev; | |
801 | #endif | |
802 | ||
803 | if (skb->pkt_type != PACKET_HOST) | |
804 | goto drop; | |
805 | ||
806 | /* Ensure that we have enough space for headers */ | |
adf30907 | 807 | rt = (struct dn_route *)skb_dst(skb); |
1da177e4 | 808 | header_len = dn_db->use_long ? 21 : 6; |
d8d1f30b | 809 | if (skb_cow(skb, LL_RESERVED_SPACE(rt->dst.dev)+header_len)) |
1da177e4 LT |
810 | goto drop; |
811 | ||
812 | /* | |
813 | * Hop count exceeded. | |
814 | */ | |
815 | if (++cb->hops > 30) | |
816 | goto drop; | |
817 | ||
d8d1f30b | 818 | skb->dev = rt->dst.dev; |
1da177e4 LT |
819 | |
820 | /* | |
821 | * If packet goes out same interface it came in on, then set | |
822 | * the Intra-Ethernet bit. This has no effect for short | |
823 | * packets, so we don't need to test for them here. | |
824 | */ | |
825 | cb->rt_flags &= ~DN_RT_F_IE; | |
826 | if (rt->rt_flags & RTCF_DOREDIRECT) | |
827 | cb->rt_flags |= DN_RT_F_IE; | |
828 | ||
5d877d87 | 829 | return NF_HOOK(NFPROTO_DECNET, NF_DN_FORWARD, skb, dev, skb->dev, |
8f40b161 | 830 | dn_to_neigh_output); |
1da177e4 LT |
831 | |
832 | drop: | |
833 | kfree_skb(skb); | |
834 | return NET_RX_DROP; | |
835 | } | |
836 | ||
1da177e4 LT |
837 | /* |
838 | * Used to catch bugs. This should never normally get | |
839 | * called. | |
840 | */ | |
841 | static int dn_rt_bug(struct sk_buff *skb) | |
842 | { | |
e87cc472 | 843 | struct dn_skb_cb *cb = DN_SKB_CB(skb); |
1da177e4 | 844 | |
e87cc472 JP |
845 | net_dbg_ratelimited("dn_rt_bug: skb from:%04x to:%04x\n", |
846 | le16_to_cpu(cb->src), le16_to_cpu(cb->dst)); | |
1da177e4 LT |
847 | |
848 | kfree_skb(skb); | |
849 | ||
0e8635a8 | 850 | return NET_RX_DROP; |
1da177e4 LT |
851 | } |
852 | ||
0dbaee3b DM |
853 | static unsigned int dn_dst_default_advmss(const struct dst_entry *dst) |
854 | { | |
855 | return dn_mss_from_pmtu(dst->dev, dst_mtu(dst)); | |
856 | } | |
857 | ||
ebb762f2 | 858 | static unsigned int dn_dst_mtu(const struct dst_entry *dst) |
d33e4553 | 859 | { |
618f9bc7 SK |
860 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
861 | ||
862 | return mtu ? : dst->dev->mtu; | |
d33e4553 DM |
863 | } |
864 | ||
f894cbf8 DM |
865 | static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, |
866 | struct sk_buff *skb, | |
867 | const void *daddr) | |
d3aaeb38 DM |
868 | { |
869 | return __neigh_lookup_errno(&dn_neigh_table, daddr, dst->dev); | |
870 | } | |
871 | ||
1da177e4 LT |
872 | static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res) |
873 | { | |
874 | struct dn_fib_info *fi = res->fi; | |
d8d1f30b | 875 | struct net_device *dev = rt->dst.dev; |
62fa8a84 | 876 | unsigned int mss_metric; |
1da177e4 | 877 | struct neighbour *n; |
1da177e4 LT |
878 | |
879 | if (fi) { | |
880 | if (DN_FIB_RES_GW(*res) && | |
881 | DN_FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) | |
882 | rt->rt_gateway = DN_FIB_RES_GW(*res); | |
62fa8a84 | 883 | dst_init_metrics(&rt->dst, fi->fib_metrics, true); |
1da177e4 LT |
884 | } |
885 | rt->rt_type = res->type; | |
886 | ||
fccd7d5c | 887 | if (dev != NULL && rt->n == NULL) { |
1da177e4 LT |
888 | n = __neigh_lookup_errno(&dn_neigh_table, &rt->rt_gateway, dev); |
889 | if (IS_ERR(n)) | |
890 | return PTR_ERR(n); | |
fccd7d5c | 891 | rt->n = n; |
1da177e4 LT |
892 | } |
893 | ||
d33e4553 | 894 | if (dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu) |
defb3519 | 895 | dst_metric_set(&rt->dst, RTAX_MTU, rt->dst.dev->mtu); |
62fa8a84 DM |
896 | mss_metric = dst_metric_raw(&rt->dst, RTAX_ADVMSS); |
897 | if (mss_metric) { | |
0dbaee3b | 898 | unsigned int mss = dn_mss_from_pmtu(dev, dst_mtu(&rt->dst)); |
62fa8a84 | 899 | if (mss_metric > mss) |
0dbaee3b DM |
900 | dst_metric_set(&rt->dst, RTAX_ADVMSS, mss); |
901 | } | |
1da177e4 LT |
902 | return 0; |
903 | } | |
904 | ||
c4ea94ab | 905 | static inline int dn_match_addr(__le16 addr1, __le16 addr2) |
1da177e4 | 906 | { |
c4106aa8 | 907 | __u16 tmp = le16_to_cpu(addr1) ^ le16_to_cpu(addr2); |
1da177e4 LT |
908 | int match = 16; |
909 | while(tmp) { | |
910 | tmp >>= 1; | |
911 | match--; | |
912 | } | |
913 | return match; | |
914 | } | |
915 | ||
c4ea94ab | 916 | static __le16 dnet_select_source(const struct net_device *dev, __le16 daddr, int scope) |
1da177e4 | 917 | { |
c4ea94ab | 918 | __le16 saddr = 0; |
fc766e4c | 919 | struct dn_dev *dn_db; |
1da177e4 LT |
920 | struct dn_ifaddr *ifa; |
921 | int best_match = 0; | |
922 | int ret; | |
923 | ||
fc766e4c ED |
924 | rcu_read_lock(); |
925 | dn_db = rcu_dereference(dev->dn_ptr); | |
926 | for (ifa = rcu_dereference(dn_db->ifa_list); | |
927 | ifa != NULL; | |
928 | ifa = rcu_dereference(ifa->ifa_next)) { | |
1da177e4 LT |
929 | if (ifa->ifa_scope > scope) |
930 | continue; | |
931 | if (!daddr) { | |
932 | saddr = ifa->ifa_local; | |
933 | break; | |
934 | } | |
935 | ret = dn_match_addr(daddr, ifa->ifa_local); | |
936 | if (ret > best_match) | |
937 | saddr = ifa->ifa_local; | |
938 | if (best_match == 0) | |
939 | saddr = ifa->ifa_local; | |
940 | } | |
fc766e4c | 941 | rcu_read_unlock(); |
1da177e4 LT |
942 | |
943 | return saddr; | |
944 | } | |
945 | ||
c4ea94ab | 946 | static inline __le16 __dn_fib_res_prefsrc(struct dn_fib_res *res) |
1da177e4 LT |
947 | { |
948 | return dnet_select_source(DN_FIB_RES_DEV(*res), DN_FIB_RES_GW(*res), res->scope); | |
949 | } | |
950 | ||
c4ea94ab | 951 | static inline __le16 dn_fib_rules_map_destination(__le16 daddr, struct dn_fib_res *res) |
1da177e4 | 952 | { |
c4ea94ab | 953 | __le16 mask = dnet_make_mask(res->prefixlen); |
1da177e4 LT |
954 | return (daddr&~mask)|res->fi->fib_nh->nh_gw; |
955 | } | |
956 | ||
bef55aeb | 957 | static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *oldflp, int try_hard) |
1da177e4 | 958 | { |
bef55aeb DM |
959 | struct flowidn fld = { |
960 | .daddr = oldflp->daddr, | |
961 | .saddr = oldflp->saddr, | |
962 | .flowidn_scope = RT_SCOPE_UNIVERSE, | |
963 | .flowidn_mark = oldflp->flowidn_mark, | |
1fb9489b | 964 | .flowidn_iif = LOOPBACK_IFINDEX, |
bef55aeb | 965 | .flowidn_oif = oldflp->flowidn_oif, |
1d28f42c | 966 | }; |
1da177e4 | 967 | struct dn_route *rt = NULL; |
7562f876 | 968 | struct net_device *dev_out = NULL, *dev; |
1da177e4 | 969 | struct neighbour *neigh = NULL; |
95c96174 ED |
970 | unsigned int hash; |
971 | unsigned int flags = 0; | |
1da177e4 LT |
972 | struct dn_fib_res res = { .fi = NULL, .type = RTN_UNICAST }; |
973 | int err; | |
974 | int free_res = 0; | |
c4ea94ab | 975 | __le16 gateway = 0; |
1da177e4 LT |
976 | |
977 | if (decnet_debug_level & 16) | |
978 | printk(KERN_DEBUG | |
979 | "dn_route_output_slow: dst=%04x src=%04x mark=%d" | |
bef55aeb DM |
980 | " iif=%d oif=%d\n", le16_to_cpu(oldflp->daddr), |
981 | le16_to_cpu(oldflp->saddr), | |
1fb9489b | 982 | oldflp->flowidn_mark, LOOPBACK_IFINDEX, |
bef55aeb | 983 | oldflp->flowidn_oif); |
1da177e4 LT |
984 | |
985 | /* If we have an output interface, verify its a DECnet device */ | |
bef55aeb DM |
986 | if (oldflp->flowidn_oif) { |
987 | dev_out = dev_get_by_index(&init_net, oldflp->flowidn_oif); | |
1da177e4 LT |
988 | err = -ENODEV; |
989 | if (dev_out && dev_out->dn_ptr == NULL) { | |
990 | dev_put(dev_out); | |
991 | dev_out = NULL; | |
992 | } | |
993 | if (dev_out == NULL) | |
994 | goto out; | |
995 | } | |
996 | ||
997 | /* If we have a source address, verify that its a local address */ | |
bef55aeb | 998 | if (oldflp->saddr) { |
1da177e4 LT |
999 | err = -EADDRNOTAVAIL; |
1000 | ||
1001 | if (dev_out) { | |
bef55aeb | 1002 | if (dn_dev_islocal(dev_out, oldflp->saddr)) |
1da177e4 LT |
1003 | goto source_ok; |
1004 | dev_put(dev_out); | |
1005 | goto out; | |
1006 | } | |
c6d14c84 ED |
1007 | rcu_read_lock(); |
1008 | for_each_netdev_rcu(&init_net, dev) { | |
7562f876 | 1009 | if (!dev->dn_ptr) |
1da177e4 | 1010 | continue; |
bef55aeb | 1011 | if (!dn_dev_islocal(dev, oldflp->saddr)) |
9bbf28a1 | 1012 | continue; |
7562f876 | 1013 | if ((dev->flags & IFF_LOOPBACK) && |
bef55aeb DM |
1014 | oldflp->daddr && |
1015 | !dn_dev_islocal(dev, oldflp->daddr)) | |
9bbf28a1 | 1016 | continue; |
7562f876 PE |
1017 | |
1018 | dev_out = dev; | |
9bbf28a1 | 1019 | break; |
1da177e4 | 1020 | } |
c6d14c84 | 1021 | rcu_read_unlock(); |
1da177e4 LT |
1022 | if (dev_out == NULL) |
1023 | goto out; | |
1024 | dev_hold(dev_out); | |
1025 | source_ok: | |
1026 | ; | |
1027 | } | |
1028 | ||
1029 | /* No destination? Assume its local */ | |
bef55aeb DM |
1030 | if (!fld.daddr) { |
1031 | fld.daddr = fld.saddr; | |
1da177e4 LT |
1032 | |
1033 | err = -EADDRNOTAVAIL; | |
1034 | if (dev_out) | |
1035 | dev_put(dev_out); | |
2774c7ab | 1036 | dev_out = init_net.loopback_dev; |
1da177e4 | 1037 | dev_hold(dev_out); |
bef55aeb DM |
1038 | if (!fld.daddr) { |
1039 | fld.daddr = | |
1040 | fld.saddr = dnet_select_source(dev_out, 0, | |
1da177e4 | 1041 | RT_SCOPE_HOST); |
bef55aeb | 1042 | if (!fld.daddr) |
1da177e4 LT |
1043 | goto out; |
1044 | } | |
1fb9489b | 1045 | fld.flowidn_oif = LOOPBACK_IFINDEX; |
1da177e4 LT |
1046 | res.type = RTN_LOCAL; |
1047 | goto make_route; | |
1048 | } | |
1049 | ||
1050 | if (decnet_debug_level & 16) | |
1051 | printk(KERN_DEBUG | |
1052 | "dn_route_output_slow: initial checks complete." | |
c4ea94ab | 1053 | " dst=%o4x src=%04x oif=%d try_hard=%d\n", |
bef55aeb DM |
1054 | le16_to_cpu(fld.daddr), le16_to_cpu(fld.saddr), |
1055 | fld.flowidn_oif, try_hard); | |
1da177e4 LT |
1056 | |
1057 | /* | |
1058 | * N.B. If the kernel is compiled without router support then | |
1059 | * dn_fib_lookup() will evaluate to non-zero so this if () block | |
1060 | * will always be executed. | |
1061 | */ | |
1062 | err = -ESRCH; | |
bef55aeb | 1063 | if (try_hard || (err = dn_fib_lookup(&fld, &res)) != 0) { |
1da177e4 LT |
1064 | struct dn_dev *dn_db; |
1065 | if (err != -ESRCH) | |
1066 | goto out; | |
1067 | /* | |
429eb0fa | 1068 | * Here the fallback is basically the standard algorithm for |
1da177e4 LT |
1069 | * routing in endnodes which is described in the DECnet routing |
1070 | * docs | |
1071 | * | |
1072 | * If we are not trying hard, look in neighbour cache. | |
1073 | * The result is tested to ensure that if a specific output | |
429eb0fa | 1074 | * device/source address was requested, then we honour that |
1da177e4 LT |
1075 | * here |
1076 | */ | |
1077 | if (!try_hard) { | |
bef55aeb | 1078 | neigh = neigh_lookup_nodev(&dn_neigh_table, &init_net, &fld.daddr); |
1da177e4 | 1079 | if (neigh) { |
bef55aeb DM |
1080 | if ((oldflp->flowidn_oif && |
1081 | (neigh->dev->ifindex != oldflp->flowidn_oif)) || | |
1082 | (oldflp->saddr && | |
1da177e4 | 1083 | (!dn_dev_islocal(neigh->dev, |
bef55aeb | 1084 | oldflp->saddr)))) { |
1da177e4 LT |
1085 | neigh_release(neigh); |
1086 | neigh = NULL; | |
1087 | } else { | |
1088 | if (dev_out) | |
1089 | dev_put(dev_out); | |
bef55aeb | 1090 | if (dn_dev_islocal(neigh->dev, fld.daddr)) { |
2774c7ab | 1091 | dev_out = init_net.loopback_dev; |
1da177e4 LT |
1092 | res.type = RTN_LOCAL; |
1093 | } else { | |
1094 | dev_out = neigh->dev; | |
1095 | } | |
1096 | dev_hold(dev_out); | |
1097 | goto select_source; | |
1098 | } | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | /* Not there? Perhaps its a local address */ | |
1103 | if (dev_out == NULL) | |
1104 | dev_out = dn_dev_get_default(); | |
1105 | err = -ENODEV; | |
1106 | if (dev_out == NULL) | |
1107 | goto out; | |
fc766e4c | 1108 | dn_db = rcu_dereference_raw(dev_out->dn_ptr); |
1da177e4 | 1109 | /* Possible improvement - check all devices for local addr */ |
bef55aeb | 1110 | if (dn_dev_islocal(dev_out, fld.daddr)) { |
1da177e4 | 1111 | dev_put(dev_out); |
2774c7ab | 1112 | dev_out = init_net.loopback_dev; |
1da177e4 LT |
1113 | dev_hold(dev_out); |
1114 | res.type = RTN_LOCAL; | |
1115 | goto select_source; | |
1116 | } | |
1117 | /* Not local either.... try sending it to the default router */ | |
1118 | neigh = neigh_clone(dn_db->router); | |
1119 | BUG_ON(neigh && neigh->dev != dev_out); | |
1120 | ||
1121 | /* Ok then, we assume its directly connected and move on */ | |
1122 | select_source: | |
1123 | if (neigh) | |
1124 | gateway = ((struct dn_neigh *)neigh)->addr; | |
1125 | if (gateway == 0) | |
bef55aeb DM |
1126 | gateway = fld.daddr; |
1127 | if (fld.saddr == 0) { | |
1128 | fld.saddr = dnet_select_source(dev_out, gateway, | |
1129 | res.type == RTN_LOCAL ? | |
1130 | RT_SCOPE_HOST : | |
1131 | RT_SCOPE_LINK); | |
1132 | if (fld.saddr == 0 && res.type != RTN_LOCAL) | |
1da177e4 LT |
1133 | goto e_addr; |
1134 | } | |
bef55aeb | 1135 | fld.flowidn_oif = dev_out->ifindex; |
1da177e4 LT |
1136 | goto make_route; |
1137 | } | |
1138 | free_res = 1; | |
1139 | ||
1140 | if (res.type == RTN_NAT) | |
1141 | goto e_inval; | |
1142 | ||
1143 | if (res.type == RTN_LOCAL) { | |
bef55aeb DM |
1144 | if (!fld.saddr) |
1145 | fld.saddr = fld.daddr; | |
1da177e4 LT |
1146 | if (dev_out) |
1147 | dev_put(dev_out); | |
2774c7ab | 1148 | dev_out = init_net.loopback_dev; |
1da177e4 | 1149 | dev_hold(dev_out); |
bef55aeb | 1150 | fld.flowidn_oif = dev_out->ifindex; |
1da177e4 LT |
1151 | if (res.fi) |
1152 | dn_fib_info_put(res.fi); | |
1153 | res.fi = NULL; | |
1154 | goto make_route; | |
1155 | } | |
1156 | ||
bef55aeb DM |
1157 | if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0) |
1158 | dn_fib_select_multipath(&fld, &res); | |
1da177e4 | 1159 | |
429eb0fa | 1160 | /* |
1da177e4 LT |
1161 | * We could add some logic to deal with default routes here and |
1162 | * get rid of some of the special casing above. | |
1163 | */ | |
1164 | ||
bef55aeb DM |
1165 | if (!fld.saddr) |
1166 | fld.saddr = DN_FIB_RES_PREFSRC(res); | |
429eb0fa | 1167 | |
1da177e4 LT |
1168 | if (dev_out) |
1169 | dev_put(dev_out); | |
1170 | dev_out = DN_FIB_RES_DEV(res); | |
1171 | dev_hold(dev_out); | |
bef55aeb | 1172 | fld.flowidn_oif = dev_out->ifindex; |
1da177e4 LT |
1173 | gateway = DN_FIB_RES_GW(res); |
1174 | ||
1175 | make_route: | |
1176 | if (dev_out->flags & IFF_LOOPBACK) | |
1177 | flags |= RTCF_LOCAL; | |
1178 | ||
f5b0a874 | 1179 | rt = dst_alloc(&dn_dst_ops, dev_out, 1, DST_OBSOLETE_NONE, DST_HOST); |
1da177e4 LT |
1180 | if (rt == NULL) |
1181 | goto e_nobufs; | |
1182 | ||
cf911662 | 1183 | memset(&rt->fld, 0, sizeof(rt->fld)); |
bef55aeb DM |
1184 | rt->fld.saddr = oldflp->saddr; |
1185 | rt->fld.daddr = oldflp->daddr; | |
1186 | rt->fld.flowidn_oif = oldflp->flowidn_oif; | |
1187 | rt->fld.flowidn_iif = 0; | |
1188 | rt->fld.flowidn_mark = oldflp->flowidn_mark; | |
1da177e4 | 1189 | |
bef55aeb DM |
1190 | rt->rt_saddr = fld.saddr; |
1191 | rt->rt_daddr = fld.daddr; | |
1192 | rt->rt_gateway = gateway ? gateway : fld.daddr; | |
1193 | rt->rt_local_src = fld.saddr; | |
1da177e4 | 1194 | |
bef55aeb DM |
1195 | rt->rt_dst_map = fld.daddr; |
1196 | rt->rt_src_map = fld.saddr; | |
1da177e4 | 1197 | |
fccd7d5c | 1198 | rt->n = neigh; |
1da177e4 LT |
1199 | neigh = NULL; |
1200 | ||
d8d1f30b CG |
1201 | rt->dst.lastuse = jiffies; |
1202 | rt->dst.output = dn_output; | |
1203 | rt->dst.input = dn_rt_bug; | |
1da177e4 LT |
1204 | rt->rt_flags = flags; |
1205 | if (flags & RTCF_LOCAL) | |
d8d1f30b | 1206 | rt->dst.input = dn_nsp_rx; |
1da177e4 LT |
1207 | |
1208 | err = dn_rt_set_next_hop(rt, &res); | |
1209 | if (err) | |
1210 | goto e_neighbour; | |
1211 | ||
bef55aeb | 1212 | hash = dn_hash(rt->fld.saddr, rt->fld.daddr); |
1da177e4 LT |
1213 | dn_insert_route(rt, hash, (struct dn_route **)pprt); |
1214 | ||
1215 | done: | |
1216 | if (neigh) | |
1217 | neigh_release(neigh); | |
1218 | if (free_res) | |
1219 | dn_fib_res_put(&res); | |
1220 | if (dev_out) | |
1221 | dev_put(dev_out); | |
1222 | out: | |
1223 | return err; | |
1224 | ||
1225 | e_addr: | |
429eb0fa YH |
1226 | err = -EADDRNOTAVAIL; |
1227 | goto done; | |
1da177e4 LT |
1228 | e_inval: |
1229 | err = -EINVAL; | |
1230 | goto done; | |
1231 | e_nobufs: | |
1232 | err = -ENOBUFS; | |
1233 | goto done; | |
1234 | e_neighbour: | |
d8d1f30b | 1235 | dst_free(&rt->dst); |
1da177e4 LT |
1236 | goto e_nobufs; |
1237 | } | |
1238 | ||
1239 | ||
1240 | /* | |
1241 | * N.B. The flags may be moved into the flowi at some future stage. | |
1242 | */ | |
bef55aeb | 1243 | static int __dn_route_output_key(struct dst_entry **pprt, const struct flowidn *flp, int flags) |
1da177e4 | 1244 | { |
95c96174 | 1245 | unsigned int hash = dn_hash(flp->saddr, flp->daddr); |
1da177e4 LT |
1246 | struct dn_route *rt = NULL; |
1247 | ||
1248 | if (!(flags & MSG_TRYHARD)) { | |
1249 | rcu_read_lock_bh(); | |
a898def2 | 1250 | for (rt = rcu_dereference_bh(dn_rt_hash_table[hash].chain); rt; |
d8d1f30b | 1251 | rt = rcu_dereference_bh(rt->dst.dn_next)) { |
bef55aeb DM |
1252 | if ((flp->daddr == rt->fld.daddr) && |
1253 | (flp->saddr == rt->fld.saddr) && | |
1254 | (flp->flowidn_mark == rt->fld.flowidn_mark) && | |
c7537967 | 1255 | dn_is_output_route(rt) && |
bef55aeb | 1256 | (rt->fld.flowidn_oif == flp->flowidn_oif)) { |
d8d1f30b | 1257 | dst_use(&rt->dst, jiffies); |
1da177e4 | 1258 | rcu_read_unlock_bh(); |
d8d1f30b | 1259 | *pprt = &rt->dst; |
1da177e4 LT |
1260 | return 0; |
1261 | } | |
1262 | } | |
1263 | rcu_read_unlock_bh(); | |
1264 | } | |
1265 | ||
1266 | return dn_route_output_slow(pprt, flp, flags); | |
1267 | } | |
1268 | ||
bef55aeb | 1269 | static int dn_route_output_key(struct dst_entry **pprt, struct flowidn *flp, int flags) |
1da177e4 LT |
1270 | { |
1271 | int err; | |
1272 | ||
1273 | err = __dn_route_output_key(pprt, flp, flags); | |
bef55aeb DM |
1274 | if (err == 0 && flp->flowidn_proto) { |
1275 | *pprt = xfrm_lookup(&init_net, *pprt, | |
1276 | flowidn_to_flowi(flp), NULL, 0); | |
452edd59 DM |
1277 | if (IS_ERR(*pprt)) { |
1278 | err = PTR_ERR(*pprt); | |
1279 | *pprt = NULL; | |
1280 | } | |
1da177e4 LT |
1281 | } |
1282 | return err; | |
1283 | } | |
1284 | ||
cec771d6 | 1285 | int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *fl, struct sock *sk, int flags) |
1da177e4 LT |
1286 | { |
1287 | int err; | |
1288 | ||
1289 | err = __dn_route_output_key(pprt, fl, flags & MSG_TRYHARD); | |
bef55aeb | 1290 | if (err == 0 && fl->flowidn_proto) { |
80c0bc9e | 1291 | if (!(flags & MSG_DONTWAIT)) |
bef55aeb DM |
1292 | fl->flowidn_flags |= FLOWI_FLAG_CAN_SLEEP; |
1293 | *pprt = xfrm_lookup(&init_net, *pprt, | |
1294 | flowidn_to_flowi(fl), sk, 0); | |
452edd59 DM |
1295 | if (IS_ERR(*pprt)) { |
1296 | err = PTR_ERR(*pprt); | |
1297 | *pprt = NULL; | |
1298 | } | |
1da177e4 LT |
1299 | } |
1300 | return err; | |
1301 | } | |
1302 | ||
1303 | static int dn_route_input_slow(struct sk_buff *skb) | |
1304 | { | |
1305 | struct dn_route *rt = NULL; | |
1306 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
1307 | struct net_device *in_dev = skb->dev; | |
1308 | struct net_device *out_dev = NULL; | |
1309 | struct dn_dev *dn_db; | |
1310 | struct neighbour *neigh = NULL; | |
95c96174 | 1311 | unsigned int hash; |
1da177e4 | 1312 | int flags = 0; |
c4ea94ab SW |
1313 | __le16 gateway = 0; |
1314 | __le16 local_src = 0; | |
bef55aeb DM |
1315 | struct flowidn fld = { |
1316 | .daddr = cb->dst, | |
1317 | .saddr = cb->src, | |
1318 | .flowidn_scope = RT_SCOPE_UNIVERSE, | |
1319 | .flowidn_mark = skb->mark, | |
1320 | .flowidn_iif = skb->dev->ifindex, | |
1d28f42c | 1321 | }; |
1da177e4 LT |
1322 | struct dn_fib_res res = { .fi = NULL, .type = RTN_UNREACHABLE }; |
1323 | int err = -EINVAL; | |
1324 | int free_res = 0; | |
1325 | ||
1326 | dev_hold(in_dev); | |
1327 | ||
fc766e4c | 1328 | if ((dn_db = rcu_dereference(in_dev->dn_ptr)) == NULL) |
1da177e4 LT |
1329 | goto out; |
1330 | ||
1331 | /* Zero source addresses are not allowed */ | |
bef55aeb | 1332 | if (fld.saddr == 0) |
1da177e4 LT |
1333 | goto out; |
1334 | ||
1335 | /* | |
1336 | * In this case we've just received a packet from a source | |
1337 | * outside ourselves pretending to come from us. We don't | |
1338 | * allow it any further to prevent routing loops, spoofing and | |
1339 | * other nasties. Loopback packets already have the dst attached | |
1340 | * so this only affects packets which have originated elsewhere. | |
1341 | */ | |
1342 | err = -ENOTUNIQ; | |
1343 | if (dn_dev_islocal(in_dev, cb->src)) | |
1344 | goto out; | |
1345 | ||
bef55aeb | 1346 | err = dn_fib_lookup(&fld, &res); |
1da177e4 LT |
1347 | if (err) { |
1348 | if (err != -ESRCH) | |
1349 | goto out; | |
1350 | /* | |
1351 | * Is the destination us ? | |
1352 | */ | |
1353 | if (!dn_dev_islocal(in_dev, cb->dst)) | |
1354 | goto e_inval; | |
1355 | ||
1356 | res.type = RTN_LOCAL; | |
1da177e4 | 1357 | } else { |
bef55aeb | 1358 | __le16 src_map = fld.saddr; |
1da177e4 LT |
1359 | free_res = 1; |
1360 | ||
1361 | out_dev = DN_FIB_RES_DEV(res); | |
1362 | if (out_dev == NULL) { | |
e87cc472 | 1363 | net_crit_ratelimited("Bug in dn_route_input_slow() No output device\n"); |
1da177e4 LT |
1364 | goto e_inval; |
1365 | } | |
1366 | dev_hold(out_dev); | |
1367 | ||
1368 | if (res.r) | |
bef55aeb | 1369 | src_map = fld.saddr; /* no NAT support for now */ |
1da177e4 LT |
1370 | |
1371 | gateway = DN_FIB_RES_GW(res); | |
1372 | if (res.type == RTN_NAT) { | |
bef55aeb | 1373 | fld.daddr = dn_fib_rules_map_destination(fld.daddr, &res); |
1da177e4 LT |
1374 | dn_fib_res_put(&res); |
1375 | free_res = 0; | |
bef55aeb | 1376 | if (dn_fib_lookup(&fld, &res)) |
1da177e4 LT |
1377 | goto e_inval; |
1378 | free_res = 1; | |
1379 | if (res.type != RTN_UNICAST) | |
1380 | goto e_inval; | |
1381 | flags |= RTCF_DNAT; | |
bef55aeb | 1382 | gateway = fld.daddr; |
1da177e4 | 1383 | } |
bef55aeb | 1384 | fld.saddr = src_map; |
1da177e4 LT |
1385 | } |
1386 | ||
1387 | switch(res.type) { | |
1388 | case RTN_UNICAST: | |
1389 | /* | |
1390 | * Forwarding check here, we only check for forwarding | |
1391 | * being turned off, if you want to only forward intra | |
1392 | * area, its up to you to set the routing tables up | |
1393 | * correctly. | |
1394 | */ | |
1395 | if (dn_db->parms.forwarding == 0) | |
1396 | goto e_inval; | |
1397 | ||
bef55aeb DM |
1398 | if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0) |
1399 | dn_fib_select_multipath(&fld, &res); | |
1da177e4 | 1400 | |
429eb0fa | 1401 | /* |
1da177e4 LT |
1402 | * Check for out_dev == in_dev. We use the RTCF_DOREDIRECT |
1403 | * flag as a hint to set the intra-ethernet bit when | |
1404 | * forwarding. If we've got NAT in operation, we don't do | |
1405 | * this optimisation. | |
1406 | */ | |
1407 | if (out_dev == in_dev && !(flags & RTCF_NAT)) | |
1408 | flags |= RTCF_DOREDIRECT; | |
1409 | ||
1410 | local_src = DN_FIB_RES_PREFSRC(res); | |
1411 | ||
1412 | case RTN_BLACKHOLE: | |
1413 | case RTN_UNREACHABLE: | |
1414 | break; | |
1415 | case RTN_LOCAL: | |
1416 | flags |= RTCF_LOCAL; | |
bef55aeb DM |
1417 | fld.saddr = cb->dst; |
1418 | fld.daddr = cb->src; | |
1da177e4 LT |
1419 | |
1420 | /* Routing tables gave us a gateway */ | |
1421 | if (gateway) | |
1422 | goto make_route; | |
1423 | ||
1424 | /* Packet was intra-ethernet, so we know its on-link */ | |
3a31b9d2 | 1425 | if (cb->rt_flags & DN_RT_F_IE) { |
1da177e4 | 1426 | gateway = cb->src; |
1da177e4 LT |
1427 | goto make_route; |
1428 | } | |
1429 | ||
1430 | /* Use the default router if there is one */ | |
1431 | neigh = neigh_clone(dn_db->router); | |
1432 | if (neigh) { | |
1433 | gateway = ((struct dn_neigh *)neigh)->addr; | |
1434 | goto make_route; | |
1435 | } | |
1436 | ||
1437 | /* Close eyes and pray */ | |
1438 | gateway = cb->src; | |
1da177e4 LT |
1439 | goto make_route; |
1440 | default: | |
1441 | goto e_inval; | |
1442 | } | |
1443 | ||
1444 | make_route: | |
f5b0a874 | 1445 | rt = dst_alloc(&dn_dst_ops, out_dev, 0, DST_OBSOLETE_NONE, DST_HOST); |
1da177e4 LT |
1446 | if (rt == NULL) |
1447 | goto e_nobufs; | |
1448 | ||
cf911662 | 1449 | memset(&rt->fld, 0, sizeof(rt->fld)); |
bef55aeb DM |
1450 | rt->rt_saddr = fld.saddr; |
1451 | rt->rt_daddr = fld.daddr; | |
1452 | rt->rt_gateway = fld.daddr; | |
1da177e4 LT |
1453 | if (gateway) |
1454 | rt->rt_gateway = gateway; | |
1455 | rt->rt_local_src = local_src ? local_src : rt->rt_saddr; | |
1456 | ||
bef55aeb DM |
1457 | rt->rt_dst_map = fld.daddr; |
1458 | rt->rt_src_map = fld.saddr; | |
1da177e4 | 1459 | |
bef55aeb DM |
1460 | rt->fld.saddr = cb->src; |
1461 | rt->fld.daddr = cb->dst; | |
1462 | rt->fld.flowidn_oif = 0; | |
1463 | rt->fld.flowidn_iif = in_dev->ifindex; | |
1464 | rt->fld.flowidn_mark = fld.flowidn_mark; | |
1da177e4 | 1465 | |
fccd7d5c | 1466 | rt->n = neigh; |
d8d1f30b CG |
1467 | rt->dst.lastuse = jiffies; |
1468 | rt->dst.output = dn_rt_bug; | |
06f8fe11 JP |
1469 | switch (res.type) { |
1470 | case RTN_UNICAST: | |
1471 | rt->dst.input = dn_forward; | |
1472 | break; | |
1473 | case RTN_LOCAL: | |
1474 | rt->dst.output = dn_output; | |
1475 | rt->dst.input = dn_nsp_rx; | |
1476 | rt->dst.dev = in_dev; | |
1477 | flags |= RTCF_LOCAL; | |
1478 | break; | |
1479 | default: | |
1480 | case RTN_UNREACHABLE: | |
1481 | case RTN_BLACKHOLE: | |
1482 | rt->dst.input = dst_discard; | |
1da177e4 LT |
1483 | } |
1484 | rt->rt_flags = flags; | |
1da177e4 LT |
1485 | |
1486 | err = dn_rt_set_next_hop(rt, &res); | |
1487 | if (err) | |
1488 | goto e_neighbour; | |
1489 | ||
bef55aeb | 1490 | hash = dn_hash(rt->fld.saddr, rt->fld.daddr); |
adf30907 | 1491 | dn_insert_route(rt, hash, &rt); |
d8d1f30b | 1492 | skb_dst_set(skb, &rt->dst); |
1da177e4 LT |
1493 | |
1494 | done: | |
1495 | if (neigh) | |
1496 | neigh_release(neigh); | |
1497 | if (free_res) | |
1498 | dn_fib_res_put(&res); | |
1499 | dev_put(in_dev); | |
1500 | if (out_dev) | |
1501 | dev_put(out_dev); | |
1502 | out: | |
1503 | return err; | |
1504 | ||
1505 | e_inval: | |
1506 | err = -EINVAL; | |
1507 | goto done; | |
1508 | ||
1509 | e_nobufs: | |
1510 | err = -ENOBUFS; | |
1511 | goto done; | |
1512 | ||
1513 | e_neighbour: | |
d8d1f30b | 1514 | dst_free(&rt->dst); |
1da177e4 LT |
1515 | goto done; |
1516 | } | |
1517 | ||
5eaa65b2 | 1518 | static int dn_route_input(struct sk_buff *skb) |
1da177e4 LT |
1519 | { |
1520 | struct dn_route *rt; | |
1521 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
95c96174 | 1522 | unsigned int hash = dn_hash(cb->src, cb->dst); |
1da177e4 | 1523 | |
adf30907 | 1524 | if (skb_dst(skb)) |
1da177e4 LT |
1525 | return 0; |
1526 | ||
1527 | rcu_read_lock(); | |
1528 | for(rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt != NULL; | |
d8d1f30b | 1529 | rt = rcu_dereference(rt->dst.dn_next)) { |
bef55aeb DM |
1530 | if ((rt->fld.saddr == cb->src) && |
1531 | (rt->fld.daddr == cb->dst) && | |
1532 | (rt->fld.flowidn_oif == 0) && | |
1533 | (rt->fld.flowidn_mark == skb->mark) && | |
1534 | (rt->fld.flowidn_iif == cb->iif)) { | |
d8d1f30b | 1535 | dst_use(&rt->dst, jiffies); |
1da177e4 | 1536 | rcu_read_unlock(); |
adf30907 | 1537 | skb_dst_set(skb, (struct dst_entry *)rt); |
1da177e4 LT |
1538 | return 0; |
1539 | } | |
1540 | } | |
1541 | rcu_read_unlock(); | |
1542 | ||
1543 | return dn_route_input_slow(skb); | |
1544 | } | |
1545 | ||
15e47304 | 1546 | static int dn_rt_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
b6544c0b | 1547 | int event, int nowait, unsigned int flags) |
1da177e4 | 1548 | { |
adf30907 | 1549 | struct dn_route *rt = (struct dn_route *)skb_dst(skb); |
1da177e4 LT |
1550 | struct rtmsg *r; |
1551 | struct nlmsghdr *nlh; | |
e3703b3d | 1552 | long expires; |
1da177e4 | 1553 | |
15e47304 | 1554 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*r), flags); |
737100e1 | 1555 | if (!nlh) |
6b60978f TG |
1556 | return -EMSGSIZE; |
1557 | ||
737100e1 | 1558 | r = nlmsg_data(nlh); |
1da177e4 LT |
1559 | r->rtm_family = AF_DECnet; |
1560 | r->rtm_dst_len = 16; | |
1561 | r->rtm_src_len = 0; | |
1562 | r->rtm_tos = 0; | |
1563 | r->rtm_table = RT_TABLE_MAIN; | |
1564 | r->rtm_type = rt->rt_type; | |
1565 | r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED; | |
1566 | r->rtm_scope = RT_SCOPE_UNIVERSE; | |
1567 | r->rtm_protocol = RTPROT_UNSPEC; | |
6b60978f | 1568 | |
1da177e4 LT |
1569 | if (rt->rt_flags & RTCF_NOTIFY) |
1570 | r->rtm_flags |= RTM_F_NOTIFY; | |
6b60978f TG |
1571 | |
1572 | if (nla_put_u32(skb, RTA_TABLE, RT_TABLE_MAIN) < 0 || | |
1573 | nla_put_le16(skb, RTA_DST, rt->rt_daddr) < 0) | |
1574 | goto errout; | |
1575 | ||
bef55aeb | 1576 | if (rt->fld.saddr) { |
1da177e4 | 1577 | r->rtm_src_len = 16; |
6b60978f TG |
1578 | if (nla_put_le16(skb, RTA_SRC, rt->fld.saddr) < 0) |
1579 | goto errout; | |
1da177e4 | 1580 | } |
6b60978f TG |
1581 | if (rt->dst.dev && |
1582 | nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex) < 0) | |
1583 | goto errout; | |
1584 | ||
1da177e4 LT |
1585 | /* |
1586 | * Note to self - change this if input routes reverse direction when | |
1587 | * they deal only with inputs and not with replies like they do | |
1588 | * currently. | |
1589 | */ | |
6b60978f TG |
1590 | if (nla_put_le16(skb, RTA_PREFSRC, rt->rt_local_src) < 0) |
1591 | goto errout; | |
1592 | ||
1593 | if (rt->rt_daddr != rt->rt_gateway && | |
1594 | nla_put_le16(skb, RTA_GATEWAY, rt->rt_gateway) < 0) | |
1595 | goto errout; | |
1596 | ||
defb3519 | 1597 | if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0) |
6b60978f TG |
1598 | goto errout; |
1599 | ||
d8d1f30b | 1600 | expires = rt->dst.expires ? rt->dst.expires - jiffies : 0; |
87a50699 | 1601 | if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, |
d8d1f30b | 1602 | rt->dst.error) < 0) |
6b60978f | 1603 | goto errout; |
1da177e4 | 1604 | |
6b60978f TG |
1605 | if (dn_is_input_route(rt) && |
1606 | nla_put_u32(skb, RTA_IIF, rt->fld.flowidn_iif) < 0) | |
1607 | goto errout; | |
1da177e4 | 1608 | |
6b60978f TG |
1609 | return nlmsg_end(skb, nlh); |
1610 | ||
1611 | errout: | |
1612 | nlmsg_cancel(skb, nlh); | |
1613 | return -EMSGSIZE; | |
1da177e4 LT |
1614 | } |
1615 | ||
2fa70df9 TG |
1616 | const struct nla_policy rtm_dn_policy[RTA_MAX + 1] = { |
1617 | [RTA_DST] = { .type = NLA_U16 }, | |
1618 | [RTA_SRC] = { .type = NLA_U16 }, | |
1619 | [RTA_IIF] = { .type = NLA_U32 }, | |
1620 | [RTA_OIF] = { .type = NLA_U32 }, | |
1621 | [RTA_GATEWAY] = { .type = NLA_U16 }, | |
1622 | [RTA_PRIORITY] = { .type = NLA_U32 }, | |
1623 | [RTA_PREFSRC] = { .type = NLA_U16 }, | |
1624 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
1625 | [RTA_MULTIPATH] = { .type = NLA_NESTED }, | |
1626 | [RTA_TABLE] = { .type = NLA_U32 }, | |
1627 | [RTA_MARK] = { .type = NLA_U32 }, | |
1628 | }; | |
1629 | ||
1da177e4 LT |
1630 | /* |
1631 | * This is called by both endnodes and routers now. | |
1632 | */ | |
661d2967 | 1633 | static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
1da177e4 | 1634 | { |
3b1e0a65 | 1635 | struct net *net = sock_net(in_skb->sk); |
737100e1 | 1636 | struct rtmsg *rtm = nlmsg_data(nlh); |
1da177e4 LT |
1637 | struct dn_route *rt = NULL; |
1638 | struct dn_skb_cb *cb; | |
1639 | int err; | |
1640 | struct sk_buff *skb; | |
bef55aeb | 1641 | struct flowidn fld; |
58d7d8f9 | 1642 | struct nlattr *tb[RTA_MAX+1]; |
1da177e4 | 1643 | |
09ad9bc7 | 1644 | if (!net_eq(net, &init_net)) |
b854272b DL |
1645 | return -EINVAL; |
1646 | ||
58d7d8f9 TG |
1647 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_dn_policy); |
1648 | if (err < 0) | |
1649 | return err; | |
1650 | ||
bef55aeb DM |
1651 | memset(&fld, 0, sizeof(fld)); |
1652 | fld.flowidn_proto = DNPROTO_NSP; | |
1da177e4 | 1653 | |
6b60978f | 1654 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1655 | if (skb == NULL) |
1656 | return -ENOBUFS; | |
459a98ed | 1657 | skb_reset_mac_header(skb); |
1da177e4 LT |
1658 | cb = DN_SKB_CB(skb); |
1659 | ||
58d7d8f9 TG |
1660 | if (tb[RTA_SRC]) |
1661 | fld.saddr = nla_get_le16(tb[RTA_SRC]); | |
1662 | ||
1663 | if (tb[RTA_DST]) | |
1664 | fld.daddr = nla_get_le16(tb[RTA_DST]); | |
1665 | ||
1666 | if (tb[RTA_IIF]) | |
1667 | fld.flowidn_iif = nla_get_u32(tb[RTA_IIF]); | |
1da177e4 | 1668 | |
bef55aeb | 1669 | if (fld.flowidn_iif) { |
1da177e4 | 1670 | struct net_device *dev; |
bef55aeb | 1671 | if ((dev = dev_get_by_index(&init_net, fld.flowidn_iif)) == NULL) { |
1da177e4 LT |
1672 | kfree_skb(skb); |
1673 | return -ENODEV; | |
1674 | } | |
1675 | if (!dev->dn_ptr) { | |
1676 | dev_put(dev); | |
1677 | kfree_skb(skb); | |
1678 | return -ENODEV; | |
1679 | } | |
b98999dc | 1680 | skb->protocol = htons(ETH_P_DNA_RT); |
1da177e4 | 1681 | skb->dev = dev; |
bef55aeb DM |
1682 | cb->src = fld.saddr; |
1683 | cb->dst = fld.daddr; | |
1da177e4 LT |
1684 | local_bh_disable(); |
1685 | err = dn_route_input(skb); | |
1686 | local_bh_enable(); | |
1687 | memset(cb, 0, sizeof(struct dn_skb_cb)); | |
adf30907 | 1688 | rt = (struct dn_route *)skb_dst(skb); |
d8d1f30b CG |
1689 | if (!err && -rt->dst.error) |
1690 | err = rt->dst.error; | |
1da177e4 | 1691 | } else { |
58d7d8f9 TG |
1692 | if (tb[RTA_OIF]) |
1693 | fld.flowidn_oif = nla_get_u32(tb[RTA_OIF]); | |
1694 | ||
bef55aeb | 1695 | err = dn_route_output_key((struct dst_entry **)&rt, &fld, 0); |
1da177e4 LT |
1696 | } |
1697 | ||
1698 | if (skb->dev) | |
1699 | dev_put(skb->dev); | |
1700 | skb->dev = NULL; | |
1701 | if (err) | |
1702 | goto out_free; | |
d8d1f30b | 1703 | skb_dst_set(skb, &rt->dst); |
1da177e4 LT |
1704 | if (rtm->rtm_flags & RTM_F_NOTIFY) |
1705 | rt->rt_flags |= RTCF_NOTIFY; | |
1706 | ||
15e47304 | 1707 | err = dn_rt_fill_info(skb, NETLINK_CB(in_skb).portid, nlh->nlmsg_seq, RTM_NEWROUTE, 0, 0); |
1da177e4 LT |
1708 | |
1709 | if (err == 0) | |
1710 | goto out_free; | |
1711 | if (err < 0) { | |
1712 | err = -EMSGSIZE; | |
1713 | goto out_free; | |
1714 | } | |
1715 | ||
15e47304 | 1716 | return rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).portid); |
1da177e4 LT |
1717 | |
1718 | out_free: | |
1719 | kfree_skb(skb); | |
1720 | return err; | |
1721 | } | |
1722 | ||
1723 | /* | |
1724 | * For routers, this is called from dn_fib_dump, but for endnodes its | |
1725 | * called directly from the rtnetlink dispatch table. | |
1726 | */ | |
1727 | int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1728 | { | |
3b1e0a65 | 1729 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1730 | struct dn_route *rt; |
1731 | int h, s_h; | |
1732 | int idx, s_idx; | |
6b60978f | 1733 | struct rtmsg *rtm; |
1da177e4 | 1734 | |
09ad9bc7 | 1735 | if (!net_eq(net, &init_net)) |
b854272b DL |
1736 | return 0; |
1737 | ||
6b60978f | 1738 | if (nlmsg_len(cb->nlh) < sizeof(struct rtmsg)) |
1da177e4 | 1739 | return -EINVAL; |
6b60978f TG |
1740 | |
1741 | rtm = nlmsg_data(cb->nlh); | |
1742 | if (!(rtm->rtm_flags & RTM_F_CLONED)) | |
1da177e4 LT |
1743 | return 0; |
1744 | ||
1745 | s_h = cb->args[0]; | |
1746 | s_idx = idx = cb->args[1]; | |
1747 | for(h = 0; h <= dn_rt_hash_mask; h++) { | |
1748 | if (h < s_h) | |
1749 | continue; | |
1750 | if (h > s_h) | |
1751 | s_idx = 0; | |
1752 | rcu_read_lock_bh(); | |
a898def2 | 1753 | for(rt = rcu_dereference_bh(dn_rt_hash_table[h].chain), idx = 0; |
1da177e4 | 1754 | rt; |
d8d1f30b | 1755 | rt = rcu_dereference_bh(rt->dst.dn_next), idx++) { |
1da177e4 LT |
1756 | if (idx < s_idx) |
1757 | continue; | |
d8d1f30b | 1758 | skb_dst_set(skb, dst_clone(&rt->dst)); |
15e47304 | 1759 | if (dn_rt_fill_info(skb, NETLINK_CB(cb->skb).portid, |
429eb0fa | 1760 | cb->nlh->nlmsg_seq, RTM_NEWROUTE, |
b6544c0b | 1761 | 1, NLM_F_MULTI) <= 0) { |
adf30907 | 1762 | skb_dst_drop(skb); |
1da177e4 LT |
1763 | rcu_read_unlock_bh(); |
1764 | goto done; | |
1765 | } | |
adf30907 | 1766 | skb_dst_drop(skb); |
1da177e4 LT |
1767 | } |
1768 | rcu_read_unlock_bh(); | |
1769 | } | |
1770 | ||
1771 | done: | |
1772 | cb->args[0] = h; | |
1773 | cb->args[1] = idx; | |
1774 | return skb->len; | |
1775 | } | |
1776 | ||
1777 | #ifdef CONFIG_PROC_FS | |
1778 | struct dn_rt_cache_iter_state { | |
1779 | int bucket; | |
1780 | }; | |
1781 | ||
1782 | static struct dn_route *dn_rt_cache_get_first(struct seq_file *seq) | |
1783 | { | |
1784 | struct dn_route *rt = NULL; | |
1785 | struct dn_rt_cache_iter_state *s = seq->private; | |
1786 | ||
1787 | for(s->bucket = dn_rt_hash_mask; s->bucket >= 0; --s->bucket) { | |
1788 | rcu_read_lock_bh(); | |
a898def2 | 1789 | rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain); |
1da177e4 LT |
1790 | if (rt) |
1791 | break; | |
1792 | rcu_read_unlock_bh(); | |
1793 | } | |
a898def2 | 1794 | return rt; |
1da177e4 LT |
1795 | } |
1796 | ||
1797 | static struct dn_route *dn_rt_cache_get_next(struct seq_file *seq, struct dn_route *rt) | |
1798 | { | |
0d89d794 | 1799 | struct dn_rt_cache_iter_state *s = seq->private; |
1da177e4 | 1800 | |
fc766e4c ED |
1801 | rt = rcu_dereference_bh(rt->dst.dn_next); |
1802 | while (!rt) { | |
1da177e4 LT |
1803 | rcu_read_unlock_bh(); |
1804 | if (--s->bucket < 0) | |
1805 | break; | |
1806 | rcu_read_lock_bh(); | |
fc766e4c | 1807 | rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain); |
1da177e4 | 1808 | } |
fc766e4c | 1809 | return rt; |
1da177e4 LT |
1810 | } |
1811 | ||
1812 | static void *dn_rt_cache_seq_start(struct seq_file *seq, loff_t *pos) | |
1813 | { | |
1814 | struct dn_route *rt = dn_rt_cache_get_first(seq); | |
1815 | ||
1816 | if (rt) { | |
1817 | while(*pos && (rt = dn_rt_cache_get_next(seq, rt))) | |
1818 | --*pos; | |
1819 | } | |
1820 | return *pos ? NULL : rt; | |
1821 | } | |
1822 | ||
1823 | static void *dn_rt_cache_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1824 | { | |
1825 | struct dn_route *rt = dn_rt_cache_get_next(seq, v); | |
1826 | ++*pos; | |
1827 | return rt; | |
1828 | } | |
1829 | ||
1830 | static void dn_rt_cache_seq_stop(struct seq_file *seq, void *v) | |
1831 | { | |
1832 | if (v) | |
1833 | rcu_read_unlock_bh(); | |
1834 | } | |
1835 | ||
1836 | static int dn_rt_cache_seq_show(struct seq_file *seq, void *v) | |
1837 | { | |
1838 | struct dn_route *rt = v; | |
1839 | char buf1[DN_ASCBUF_LEN], buf2[DN_ASCBUF_LEN]; | |
1840 | ||
1841 | seq_printf(seq, "%-8s %-7s %-7s %04d %04d %04d\n", | |
794785bf DM |
1842 | rt->dst.dev ? rt->dst.dev->name : "*", |
1843 | dn_addr2asc(le16_to_cpu(rt->rt_daddr), buf1), | |
1844 | dn_addr2asc(le16_to_cpu(rt->rt_saddr), buf2), | |
1845 | atomic_read(&rt->dst.__refcnt), | |
1846 | rt->dst.__use, 0); | |
1da177e4 | 1847 | return 0; |
429eb0fa | 1848 | } |
1da177e4 | 1849 | |
56b3d975 | 1850 | static const struct seq_operations dn_rt_cache_seq_ops = { |
1da177e4 LT |
1851 | .start = dn_rt_cache_seq_start, |
1852 | .next = dn_rt_cache_seq_next, | |
1853 | .stop = dn_rt_cache_seq_stop, | |
1854 | .show = dn_rt_cache_seq_show, | |
1855 | }; | |
1856 | ||
1857 | static int dn_rt_cache_seq_open(struct inode *inode, struct file *file) | |
1858 | { | |
31164088 PE |
1859 | return seq_open_private(file, &dn_rt_cache_seq_ops, |
1860 | sizeof(struct dn_rt_cache_iter_state)); | |
1da177e4 LT |
1861 | } |
1862 | ||
9a32144e | 1863 | static const struct file_operations dn_rt_cache_seq_fops = { |
1da177e4 LT |
1864 | .owner = THIS_MODULE, |
1865 | .open = dn_rt_cache_seq_open, | |
1866 | .read = seq_read, | |
1867 | .llseek = seq_lseek, | |
1868 | .release = seq_release_private, | |
1869 | }; | |
1870 | ||
1871 | #endif /* CONFIG_PROC_FS */ | |
1872 | ||
1873 | void __init dn_route_init(void) | |
1874 | { | |
1875 | int i, goal, order; | |
1876 | ||
e5d679f3 AD |
1877 | dn_dst_ops.kmem_cachep = |
1878 | kmem_cache_create("dn_dst_cache", sizeof(struct dn_route), 0, | |
20c2df83 | 1879 | SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); |
fc66f95c | 1880 | dst_entries_init(&dn_dst_ops); |
b24b8a24 | 1881 | setup_timer(&dn_route_timer, dn_dst_check_expire, 0); |
1da177e4 LT |
1882 | dn_route_timer.expires = jiffies + decnet_dst_gc_interval * HZ; |
1883 | add_timer(&dn_route_timer); | |
1884 | ||
4481374c | 1885 | goal = totalram_pages >> (26 - PAGE_SHIFT); |
1da177e4 LT |
1886 | |
1887 | for(order = 0; (1UL << order) < goal; order++) | |
1888 | /* NOTHING */; | |
1889 | ||
429eb0fa YH |
1890 | /* |
1891 | * Only want 1024 entries max, since the table is very, very unlikely | |
1892 | * to be larger than that. | |
1893 | */ | |
1894 | while(order && ((((1UL << order) * PAGE_SIZE) / | |
1895 | sizeof(struct dn_rt_hash_bucket)) >= 2048)) | |
1896 | order--; | |
1897 | ||
1898 | do { | |
1899 | dn_rt_hash_mask = (1UL << order) * PAGE_SIZE / | |
1900 | sizeof(struct dn_rt_hash_bucket); | |
1901 | while(dn_rt_hash_mask & (dn_rt_hash_mask - 1)) | |
1902 | dn_rt_hash_mask--; | |
1903 | dn_rt_hash_table = (struct dn_rt_hash_bucket *) | |
1904 | __get_free_pages(GFP_ATOMIC, order); | |
1905 | } while (dn_rt_hash_table == NULL && --order > 0); | |
1da177e4 LT |
1906 | |
1907 | if (!dn_rt_hash_table) | |
429eb0fa | 1908 | panic("Failed to allocate DECnet route cache hash table\n"); |
1da177e4 | 1909 | |
429eb0fa YH |
1910 | printk(KERN_INFO |
1911 | "DECnet: Routing cache hash table of %u buckets, %ldKbytes\n", | |
1912 | dn_rt_hash_mask, | |
1da177e4 LT |
1913 | (long)(dn_rt_hash_mask*sizeof(struct dn_rt_hash_bucket))/1024); |
1914 | ||
1915 | dn_rt_hash_mask--; | |
429eb0fa YH |
1916 | for(i = 0; i <= dn_rt_hash_mask; i++) { |
1917 | spin_lock_init(&dn_rt_hash_table[i].lock); | |
1918 | dn_rt_hash_table[i].chain = NULL; | |
1919 | } | |
1da177e4 | 1920 | |
429eb0fa | 1921 | dn_dst_ops.gc_thresh = (dn_rt_hash_mask + 1); |
1da177e4 | 1922 | |
d4beaa66 G |
1923 | proc_create("decnet_cache", S_IRUGO, init_net.proc_net, |
1924 | &dn_rt_cache_seq_fops); | |
fa34ddd7 TG |
1925 | |
1926 | #ifdef CONFIG_DECNET_ROUTER | |
c7ac8679 GR |
1927 | rtnl_register(PF_DECnet, RTM_GETROUTE, dn_cache_getroute, |
1928 | dn_fib_dump, NULL); | |
fa34ddd7 TG |
1929 | #else |
1930 | rtnl_register(PF_DECnet, RTM_GETROUTE, dn_cache_getroute, | |
c7ac8679 | 1931 | dn_cache_dump, NULL); |
fa34ddd7 | 1932 | #endif |
1da177e4 LT |
1933 | } |
1934 | ||
1935 | void __exit dn_route_cleanup(void) | |
1936 | { | |
1937 | del_timer(&dn_route_timer); | |
1938 | dn_run_flush(0); | |
1939 | ||
ece31ffd | 1940 | remove_proc_entry("decnet_cache", init_net.proc_net); |
fc66f95c | 1941 | dst_entries_destroy(&dn_dst_ops); |
1da177e4 LT |
1942 | } |
1943 |