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 | * | |
429eb0fa | 6 | * DECnet Neighbour Functions (Adjacency Database and |
1da177e4 LT |
7 | * On-Ethernet Cache) |
8 | * | |
9 | * Author: Steve Whitehouse <SteveW@ACM.org> | |
10 | * | |
11 | * | |
12 | * Changes: | |
13 | * Steve Whitehouse : Fixed router listing routine | |
14 | * Steve Whitehouse : Added error_report functions | |
15 | * Steve Whitehouse : Added default router detection | |
16 | * Steve Whitehouse : Hop counts in outgoing messages | |
17 | * Steve Whitehouse : Fixed src/dst in outgoing messages so | |
18 | * forwarding now stands a good chance of | |
19 | * working. | |
20 | * Steve Whitehouse : Fixed neighbour states (for now anyway). | |
21 | * Steve Whitehouse : Made error_report functions dummies. This | |
22 | * is not the right place to return skbs. | |
23 | * Steve Whitehouse : Convert to seq_file | |
24 | * | |
25 | */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/net.h> |
28 | #include <linux/module.h> | |
29 | #include <linux/socket.h> | |
30 | #include <linux/if_arp.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
1da177e4 LT |
32 | #include <linux/if_ether.h> |
33 | #include <linux/init.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/string.h> | |
36 | #include <linux/netfilter_decnet.h> | |
37 | #include <linux/spinlock.h> | |
38 | #include <linux/seq_file.h> | |
39 | #include <linux/rcupdate.h> | |
40 | #include <linux/jhash.h> | |
60063497 | 41 | #include <linux/atomic.h> |
457c4cbc | 42 | #include <net/net_namespace.h> |
1da177e4 LT |
43 | #include <net/neighbour.h> |
44 | #include <net/dst.h> | |
45 | #include <net/flow.h> | |
46 | #include <net/dn.h> | |
47 | #include <net/dn_dev.h> | |
48 | #include <net/dn_neigh.h> | |
49 | #include <net/dn_route.h> | |
50 | ||
1da177e4 LT |
51 | static int dn_neigh_construct(struct neighbour *); |
52 | static void dn_long_error_report(struct neighbour *, struct sk_buff *); | |
53 | static void dn_short_error_report(struct neighbour *, struct sk_buff *); | |
8f40b161 DM |
54 | static int dn_long_output(struct neighbour *, struct sk_buff *); |
55 | static int dn_short_output(struct neighbour *, struct sk_buff *); | |
56 | static int dn_phase3_output(struct neighbour *, struct sk_buff *); | |
1da177e4 LT |
57 | |
58 | ||
59 | /* | |
60 | * For talking to broadcast devices: Ethernet & PPP | |
61 | */ | |
89d69d2b | 62 | static const struct neigh_ops dn_long_ops = { |
1da177e4 LT |
63 | .family = AF_DECnet, |
64 | .error_report = dn_long_error_report, | |
65 | .output = dn_long_output, | |
66 | .connected_output = dn_long_output, | |
1da177e4 LT |
67 | }; |
68 | ||
69 | /* | |
70 | * For talking to pointopoint and multidrop devices: DDCMP and X.25 | |
71 | */ | |
89d69d2b | 72 | static const struct neigh_ops dn_short_ops = { |
1da177e4 LT |
73 | .family = AF_DECnet, |
74 | .error_report = dn_short_error_report, | |
75 | .output = dn_short_output, | |
76 | .connected_output = dn_short_output, | |
1da177e4 LT |
77 | }; |
78 | ||
79 | /* | |
80 | * For talking to DECnet phase III nodes | |
81 | */ | |
89d69d2b | 82 | static const struct neigh_ops dn_phase3_ops = { |
1da177e4 LT |
83 | .family = AF_DECnet, |
84 | .error_report = dn_short_error_report, /* Can use short version here */ | |
85 | .output = dn_phase3_output, | |
86 | .connected_output = dn_phase3_output, | |
1da177e4 LT |
87 | }; |
88 | ||
d6bf7817 ED |
89 | static u32 dn_neigh_hash(const void *pkey, |
90 | const struct net_device *dev, | |
2c2aba6c | 91 | __u32 *hash_rnd) |
d6bf7817 | 92 | { |
2c2aba6c | 93 | return jhash_2words(*(__u16 *)pkey, 0, hash_rnd[0]); |
d6bf7817 ED |
94 | } |
95 | ||
1da177e4 LT |
96 | struct neigh_table dn_neigh_table = { |
97 | .family = PF_DECnet, | |
daaba4fa | 98 | .entry_size = NEIGH_ENTRY_SIZE(sizeof(struct dn_neigh)), |
c4ea94ab | 99 | .key_len = sizeof(__le16), |
1da177e4 LT |
100 | .hash = dn_neigh_hash, |
101 | .constructor = dn_neigh_construct, | |
102 | .id = "dn_neigh_cache", | |
103 | .parms ={ | |
104 | .tbl = &dn_neigh_table, | |
1f9248e5 JP |
105 | .reachable_time = 30 * HZ, |
106 | .data = { | |
107 | [NEIGH_VAR_MCAST_PROBES] = 0, | |
108 | [NEIGH_VAR_UCAST_PROBES] = 0, | |
109 | [NEIGH_VAR_APP_PROBES] = 0, | |
110 | [NEIGH_VAR_RETRANS_TIME] = 1 * HZ, | |
111 | [NEIGH_VAR_BASE_REACHABLE_TIME] = 30 * HZ, | |
112 | [NEIGH_VAR_DELAY_PROBE_TIME] = 5 * HZ, | |
113 | [NEIGH_VAR_GC_STALETIME] = 60 * HZ, | |
114 | [NEIGH_VAR_QUEUE_LEN_BYTES] = 64*1024, | |
115 | [NEIGH_VAR_PROXY_QLEN] = 0, | |
116 | [NEIGH_VAR_ANYCAST_DELAY] = 0, | |
117 | [NEIGH_VAR_PROXY_DELAY] = 0, | |
118 | [NEIGH_VAR_LOCKTIME] = 1 * HZ, | |
119 | }, | |
1da177e4 LT |
120 | }, |
121 | .gc_interval = 30 * HZ, | |
122 | .gc_thresh1 = 128, | |
123 | .gc_thresh2 = 512, | |
124 | .gc_thresh3 = 1024, | |
125 | }; | |
126 | ||
1da177e4 LT |
127 | static int dn_neigh_construct(struct neighbour *neigh) |
128 | { | |
129 | struct net_device *dev = neigh->dev; | |
130 | struct dn_neigh *dn = (struct dn_neigh *)neigh; | |
131 | struct dn_dev *dn_db; | |
132 | struct neigh_parms *parms; | |
133 | ||
134 | rcu_read_lock(); | |
135 | dn_db = rcu_dereference(dev->dn_ptr); | |
136 | if (dn_db == NULL) { | |
137 | rcu_read_unlock(); | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | parms = dn_db->neigh_parms; | |
142 | if (!parms) { | |
143 | rcu_read_unlock(); | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | __neigh_parms_put(neigh->parms); | |
148 | neigh->parms = neigh_parms_clone(parms); | |
1da177e4 LT |
149 | |
150 | if (dn_db->use_long) | |
151 | neigh->ops = &dn_long_ops; | |
152 | else | |
153 | neigh->ops = &dn_short_ops; | |
1f07247d | 154 | rcu_read_unlock(); |
1da177e4 LT |
155 | |
156 | if (dn->flags & DN_NDFLAG_P3) | |
157 | neigh->ops = &dn_phase3_ops; | |
158 | ||
159 | neigh->nud_state = NUD_NOARP; | |
160 | neigh->output = neigh->ops->connected_output; | |
161 | ||
162 | if ((dev->type == ARPHRD_IPGRE) || (dev->flags & IFF_POINTOPOINT)) | |
163 | memcpy(neigh->ha, dev->broadcast, dev->addr_len); | |
164 | else if ((dev->type == ARPHRD_ETHER) || (dev->type == ARPHRD_LOOPBACK)) | |
165 | dn_dn2eth(neigh->ha, dn->addr); | |
166 | else { | |
e87cc472 JP |
167 | net_dbg_ratelimited("Trying to create neigh for hw %d\n", |
168 | dev->type); | |
1da177e4 LT |
169 | return -EINVAL; |
170 | } | |
171 | ||
172 | /* | |
173 | * Make an estimate of the remote block size by assuming that its | |
174 | * two less then the device mtu, which it true for ethernet (and | |
175 | * other things which support long format headers) since there is | |
176 | * an extra length field (of 16 bits) which isn't part of the | |
177 | * ethernet headers and which the DECnet specs won't admit is part | |
178 | * of the DECnet routing headers either. | |
179 | * | |
180 | * If we over estimate here its no big deal, the NSP negotiations | |
181 | * will prevent us from sending packets which are too large for the | |
182 | * remote node to handle. In any case this figure is normally updated | |
183 | * by a hello message in most cases. | |
184 | */ | |
185 | dn->blksize = dev->mtu - 2; | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static void dn_long_error_report(struct neighbour *neigh, struct sk_buff *skb) | |
191 | { | |
192 | printk(KERN_DEBUG "dn_long_error_report: called\n"); | |
193 | kfree_skb(skb); | |
194 | } | |
195 | ||
196 | ||
197 | static void dn_short_error_report(struct neighbour *neigh, struct sk_buff *skb) | |
198 | { | |
199 | printk(KERN_DEBUG "dn_short_error_report: called\n"); | |
200 | kfree_skb(skb); | |
201 | } | |
202 | ||
203 | static int dn_neigh_output_packet(struct sk_buff *skb) | |
204 | { | |
adf30907 | 205 | struct dst_entry *dst = skb_dst(skb); |
1da177e4 | 206 | struct dn_route *rt = (struct dn_route *)dst; |
fccd7d5c | 207 | struct neighbour *neigh = rt->n; |
1da177e4 LT |
208 | struct net_device *dev = neigh->dev; |
209 | char mac_addr[ETH_ALEN]; | |
3329bdfc DM |
210 | unsigned int seq; |
211 | int err; | |
1da177e4 LT |
212 | |
213 | dn_dn2eth(mac_addr, rt->rt_local_src); | |
3329bdfc DM |
214 | do { |
215 | seq = read_seqbegin(&neigh->ha_lock); | |
216 | err = dev_hard_header(skb, dev, ntohs(skb->protocol), | |
217 | neigh->ha, mac_addr, skb->len); | |
218 | } while (read_seqretry(&neigh->ha_lock, seq)); | |
219 | ||
220 | if (err >= 0) | |
221 | err = dev_queue_xmit(skb); | |
222 | else { | |
223 | kfree_skb(skb); | |
224 | err = -EINVAL; | |
225 | } | |
226 | return err; | |
1da177e4 LT |
227 | } |
228 | ||
8f40b161 | 229 | static int dn_long_output(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 230 | { |
1da177e4 LT |
231 | struct net_device *dev = neigh->dev; |
232 | int headroom = dev->hard_header_len + sizeof(struct dn_long_packet) + 3; | |
233 | unsigned char *data; | |
234 | struct dn_long_packet *lp; | |
235 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
236 | ||
237 | ||
238 | if (skb_headroom(skb) < headroom) { | |
239 | struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom); | |
240 | if (skb2 == NULL) { | |
e87cc472 | 241 | net_crit_ratelimited("dn_long_output: no memory\n"); |
1da177e4 LT |
242 | kfree_skb(skb); |
243 | return -ENOBUFS; | |
244 | } | |
5d0ba55b | 245 | consume_skb(skb); |
1da177e4 | 246 | skb = skb2; |
e87cc472 | 247 | net_info_ratelimited("dn_long_output: Increasing headroom\n"); |
1da177e4 LT |
248 | } |
249 | ||
250 | data = skb_push(skb, sizeof(struct dn_long_packet) + 3); | |
251 | lp = (struct dn_long_packet *)(data+3); | |
252 | ||
c4106aa8 | 253 | *((__le16 *)data) = cpu_to_le16(skb->len - 2); |
1da177e4 LT |
254 | *(data + 2) = 1 | DN_RT_F_PF; /* Padding */ |
255 | ||
256 | lp->msgflg = DN_RT_PKT_LONG|(cb->rt_flags&(DN_RT_F_IE|DN_RT_F_RQR|DN_RT_F_RTS)); | |
257 | lp->d_area = lp->d_subarea = 0; | |
c4ea94ab | 258 | dn_dn2eth(lp->d_id, cb->dst); |
1da177e4 | 259 | lp->s_area = lp->s_subarea = 0; |
c4ea94ab | 260 | dn_dn2eth(lp->s_id, cb->src); |
1da177e4 LT |
261 | lp->nl2 = 0; |
262 | lp->visit_ct = cb->hops & 0x3f; | |
263 | lp->s_class = 0; | |
264 | lp->pt = 0; | |
265 | ||
c1d2bbe1 | 266 | skb_reset_network_header(skb); |
1da177e4 | 267 | |
5d877d87 JE |
268 | return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL, |
269 | neigh->dev, dn_neigh_output_packet); | |
1da177e4 LT |
270 | } |
271 | ||
8f40b161 | 272 | static int dn_short_output(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 273 | { |
1da177e4 LT |
274 | struct net_device *dev = neigh->dev; |
275 | int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2; | |
276 | struct dn_short_packet *sp; | |
277 | unsigned char *data; | |
278 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
279 | ||
280 | ||
429eb0fa YH |
281 | if (skb_headroom(skb) < headroom) { |
282 | struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom); | |
283 | if (skb2 == NULL) { | |
e87cc472 | 284 | net_crit_ratelimited("dn_short_output: no memory\n"); |
429eb0fa YH |
285 | kfree_skb(skb); |
286 | return -ENOBUFS; | |
287 | } | |
5d0ba55b | 288 | consume_skb(skb); |
429eb0fa | 289 | skb = skb2; |
e87cc472 | 290 | net_info_ratelimited("dn_short_output: Increasing headroom\n"); |
429eb0fa | 291 | } |
1da177e4 LT |
292 | |
293 | data = skb_push(skb, sizeof(struct dn_short_packet) + 2); | |
c4106aa8 | 294 | *((__le16 *)data) = cpu_to_le16(skb->len - 2); |
1da177e4 LT |
295 | sp = (struct dn_short_packet *)(data+2); |
296 | ||
297 | sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS)); | |
298 | sp->dstnode = cb->dst; | |
299 | sp->srcnode = cb->src; | |
300 | sp->forward = cb->hops & 0x3f; | |
301 | ||
c1d2bbe1 | 302 | skb_reset_network_header(skb); |
1da177e4 | 303 | |
5d877d87 JE |
304 | return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL, |
305 | neigh->dev, dn_neigh_output_packet); | |
1da177e4 LT |
306 | } |
307 | ||
308 | /* | |
309 | * Phase 3 output is the same is short output, execpt that | |
310 | * it clears the area bits before transmission. | |
311 | */ | |
8f40b161 | 312 | static int dn_phase3_output(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 313 | { |
1da177e4 LT |
314 | struct net_device *dev = neigh->dev; |
315 | int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2; | |
316 | struct dn_short_packet *sp; | |
317 | unsigned char *data; | |
318 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
319 | ||
320 | if (skb_headroom(skb) < headroom) { | |
321 | struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom); | |
322 | if (skb2 == NULL) { | |
e87cc472 | 323 | net_crit_ratelimited("dn_phase3_output: no memory\n"); |
1da177e4 LT |
324 | kfree_skb(skb); |
325 | return -ENOBUFS; | |
326 | } | |
5d0ba55b | 327 | consume_skb(skb); |
1da177e4 | 328 | skb = skb2; |
e87cc472 | 329 | net_info_ratelimited("dn_phase3_output: Increasing headroom\n"); |
1da177e4 LT |
330 | } |
331 | ||
332 | data = skb_push(skb, sizeof(struct dn_short_packet) + 2); | |
c4106aa8 | 333 | *((__le16 *)data) = cpu_to_le16(skb->len - 2); |
1da177e4 LT |
334 | sp = (struct dn_short_packet *)(data + 2); |
335 | ||
336 | sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS)); | |
c4106aa8 HH |
337 | sp->dstnode = cb->dst & cpu_to_le16(0x03ff); |
338 | sp->srcnode = cb->src & cpu_to_le16(0x03ff); | |
1da177e4 LT |
339 | sp->forward = cb->hops & 0x3f; |
340 | ||
c1d2bbe1 | 341 | skb_reset_network_header(skb); |
1da177e4 | 342 | |
5d877d87 JE |
343 | return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL, |
344 | neigh->dev, dn_neigh_output_packet); | |
1da177e4 LT |
345 | } |
346 | ||
347 | /* | |
348 | * Unfortunately, the neighbour code uses the device in its hash | |
349 | * function, so we don't get any advantage from it. This function | |
350 | * basically does a neigh_lookup(), but without comparing the device | |
351 | * field. This is required for the On-Ethernet cache | |
352 | */ | |
353 | ||
354 | /* | |
355 | * Pointopoint link receives a hello message | |
356 | */ | |
357 | void dn_neigh_pointopoint_hello(struct sk_buff *skb) | |
358 | { | |
359 | kfree_skb(skb); | |
360 | } | |
361 | ||
362 | /* | |
363 | * Ethernet router hello message received | |
364 | */ | |
365 | int dn_neigh_router_hello(struct sk_buff *skb) | |
366 | { | |
367 | struct rtnode_hello_message *msg = (struct rtnode_hello_message *)skb->data; | |
368 | ||
369 | struct neighbour *neigh; | |
370 | struct dn_neigh *dn; | |
371 | struct dn_dev *dn_db; | |
c4ea94ab | 372 | __le16 src; |
1da177e4 | 373 | |
c4ea94ab | 374 | src = dn_eth2dn(msg->id); |
1da177e4 LT |
375 | |
376 | neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1); | |
377 | ||
378 | dn = (struct dn_neigh *)neigh; | |
379 | ||
380 | if (neigh) { | |
381 | write_lock(&neigh->lock); | |
382 | ||
383 | neigh->used = jiffies; | |
fc766e4c | 384 | dn_db = rcu_dereference(neigh->dev->dn_ptr); |
1da177e4 LT |
385 | |
386 | if (!(neigh->nud_state & NUD_PERMANENT)) { | |
387 | neigh->updated = jiffies; | |
388 | ||
389 | if (neigh->dev->type == ARPHRD_ETHER) | |
390 | memcpy(neigh->ha, ð_hdr(skb)->h_source, ETH_ALEN); | |
391 | ||
c4106aa8 | 392 | dn->blksize = le16_to_cpu(msg->blksize); |
1da177e4 LT |
393 | dn->priority = msg->priority; |
394 | ||
395 | dn->flags &= ~DN_NDFLAG_P3; | |
396 | ||
06f8fe11 JP |
397 | switch (msg->iinfo & DN_RT_INFO_TYPE) { |
398 | case DN_RT_INFO_L1RT: | |
399 | dn->flags &=~DN_NDFLAG_R2; | |
400 | dn->flags |= DN_NDFLAG_R1; | |
401 | break; | |
402 | case DN_RT_INFO_L2RT: | |
403 | dn->flags |= DN_NDFLAG_R2; | |
1da177e4 LT |
404 | } |
405 | } | |
406 | ||
5062430c | 407 | /* Only use routers in our area */ |
c4106aa8 | 408 | if ((le16_to_cpu(src)>>10) == (le16_to_cpu((decnet_address))>>10)) { |
5062430c PC |
409 | if (!dn_db->router) { |
410 | dn_db->router = neigh_clone(neigh); | |
411 | } else { | |
412 | if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority) | |
413 | neigh_release(xchg(&dn_db->router, neigh_clone(neigh))); | |
414 | } | |
1da177e4 LT |
415 | } |
416 | write_unlock(&neigh->lock); | |
417 | neigh_release(neigh); | |
418 | } | |
419 | ||
420 | kfree_skb(skb); | |
421 | return 0; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Endnode hello message received | |
426 | */ | |
427 | int dn_neigh_endnode_hello(struct sk_buff *skb) | |
428 | { | |
429 | struct endnode_hello_message *msg = (struct endnode_hello_message *)skb->data; | |
430 | struct neighbour *neigh; | |
431 | struct dn_neigh *dn; | |
c4ea94ab | 432 | __le16 src; |
1da177e4 | 433 | |
c4ea94ab | 434 | src = dn_eth2dn(msg->id); |
1da177e4 LT |
435 | |
436 | neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1); | |
437 | ||
438 | dn = (struct dn_neigh *)neigh; | |
439 | ||
440 | if (neigh) { | |
441 | write_lock(&neigh->lock); | |
442 | ||
443 | neigh->used = jiffies; | |
444 | ||
445 | if (!(neigh->nud_state & NUD_PERMANENT)) { | |
446 | neigh->updated = jiffies; | |
447 | ||
448 | if (neigh->dev->type == ARPHRD_ETHER) | |
449 | memcpy(neigh->ha, ð_hdr(skb)->h_source, ETH_ALEN); | |
450 | dn->flags &= ~(DN_NDFLAG_R1 | DN_NDFLAG_R2); | |
c4106aa8 | 451 | dn->blksize = le16_to_cpu(msg->blksize); |
1da177e4 LT |
452 | dn->priority = 0; |
453 | } | |
454 | ||
455 | write_unlock(&neigh->lock); | |
456 | neigh_release(neigh); | |
457 | } | |
458 | ||
459 | kfree_skb(skb); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static char *dn_find_slot(char *base, int max, int priority) | |
464 | { | |
465 | int i; | |
466 | unsigned char *min = NULL; | |
467 | ||
468 | base += 6; /* skip first id */ | |
469 | ||
470 | for(i = 0; i < max; i++) { | |
471 | if (!min || (*base < *min)) | |
472 | min = base; | |
473 | base += 7; /* find next priority */ | |
474 | } | |
475 | ||
476 | if (!min) | |
477 | return NULL; | |
478 | ||
479 | return (*min < priority) ? (min - 6) : NULL; | |
480 | } | |
481 | ||
482 | struct elist_cb_state { | |
483 | struct net_device *dev; | |
484 | unsigned char *ptr; | |
485 | unsigned char *rs; | |
486 | int t, n; | |
487 | }; | |
488 | ||
489 | static void neigh_elist_cb(struct neighbour *neigh, void *_info) | |
490 | { | |
491 | struct elist_cb_state *s = _info; | |
1da177e4 LT |
492 | struct dn_neigh *dn; |
493 | ||
494 | if (neigh->dev != s->dev) | |
495 | return; | |
496 | ||
497 | dn = (struct dn_neigh *) neigh; | |
498 | if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2))) | |
499 | return; | |
500 | ||
1da177e4 LT |
501 | if (s->t == s->n) |
502 | s->rs = dn_find_slot(s->ptr, s->n, dn->priority); | |
503 | else | |
504 | s->t++; | |
505 | if (s->rs == NULL) | |
506 | return; | |
507 | ||
508 | dn_dn2eth(s->rs, dn->addr); | |
509 | s->rs += 6; | |
510 | *(s->rs) = neigh->nud_state & NUD_CONNECTED ? 0x80 : 0x0; | |
511 | *(s->rs) |= dn->priority; | |
512 | s->rs++; | |
513 | } | |
514 | ||
515 | int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n) | |
516 | { | |
517 | struct elist_cb_state state; | |
518 | ||
519 | state.dev = dev; | |
520 | state.t = 0; | |
521 | state.n = n; | |
522 | state.ptr = ptr; | |
523 | state.rs = ptr; | |
524 | ||
525 | neigh_for_each(&dn_neigh_table, neigh_elist_cb, &state); | |
526 | ||
527 | return state.t; | |
528 | } | |
529 | ||
530 | ||
531 | #ifdef CONFIG_PROC_FS | |
532 | ||
533 | static inline void dn_neigh_format_entry(struct seq_file *seq, | |
534 | struct neighbour *n) | |
535 | { | |
536 | struct dn_neigh *dn = (struct dn_neigh *) n; | |
537 | char buf[DN_ASCBUF_LEN]; | |
538 | ||
539 | read_lock(&n->lock); | |
540 | seq_printf(seq, "%-7s %s%s%s %02x %02d %07ld %-8s\n", | |
c4106aa8 | 541 | dn_addr2asc(le16_to_cpu(dn->addr), buf), |
1da177e4 LT |
542 | (dn->flags&DN_NDFLAG_R1) ? "1" : "-", |
543 | (dn->flags&DN_NDFLAG_R2) ? "2" : "-", | |
544 | (dn->flags&DN_NDFLAG_P3) ? "3" : "-", | |
545 | dn->n.nud_state, | |
546 | atomic_read(&dn->n.refcnt), | |
547 | dn->blksize, | |
548 | (dn->n.dev) ? dn->n.dev->name : "?"); | |
549 | read_unlock(&n->lock); | |
550 | } | |
551 | ||
552 | static int dn_neigh_seq_show(struct seq_file *seq, void *v) | |
553 | { | |
554 | if (v == SEQ_START_TOKEN) { | |
555 | seq_puts(seq, "Addr Flags State Use Blksize Dev\n"); | |
556 | } else { | |
557 | dn_neigh_format_entry(seq, v); | |
558 | } | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | static void *dn_neigh_seq_start(struct seq_file *seq, loff_t *pos) | |
564 | { | |
565 | return neigh_seq_start(seq, pos, &dn_neigh_table, | |
566 | NEIGH_SEQ_NEIGH_ONLY); | |
567 | } | |
568 | ||
56b3d975 | 569 | static const struct seq_operations dn_neigh_seq_ops = { |
1da177e4 LT |
570 | .start = dn_neigh_seq_start, |
571 | .next = neigh_seq_next, | |
572 | .stop = neigh_seq_stop, | |
573 | .show = dn_neigh_seq_show, | |
574 | }; | |
575 | ||
576 | static int dn_neigh_seq_open(struct inode *inode, struct file *file) | |
577 | { | |
426b5303 EB |
578 | return seq_open_net(inode, file, &dn_neigh_seq_ops, |
579 | sizeof(struct neigh_seq_state)); | |
1da177e4 LT |
580 | } |
581 | ||
9a32144e | 582 | static const struct file_operations dn_neigh_seq_fops = { |
1da177e4 LT |
583 | .owner = THIS_MODULE, |
584 | .open = dn_neigh_seq_open, | |
585 | .read = seq_read, | |
586 | .llseek = seq_lseek, | |
426b5303 | 587 | .release = seq_release_net, |
1da177e4 LT |
588 | }; |
589 | ||
590 | #endif | |
591 | ||
592 | void __init dn_neigh_init(void) | |
593 | { | |
594 | neigh_table_init(&dn_neigh_table); | |
d4beaa66 G |
595 | proc_create("decnet_neigh", S_IRUGO, init_net.proc_net, |
596 | &dn_neigh_seq_fops); | |
1da177e4 LT |
597 | } |
598 | ||
599 | void __exit dn_neigh_cleanup(void) | |
600 | { | |
ece31ffd | 601 | remove_proc_entry("decnet_neigh", init_net.proc_net); |
1da177e4 LT |
602 | neigh_table_clear(&dn_neigh_table); |
603 | } |