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 | ||
60395a20 EB |
96 | static bool dn_key_eq(const struct neighbour *neigh, const void *pkey) |
97 | { | |
98 | return neigh_key_eq16(neigh, pkey); | |
99 | } | |
100 | ||
1da177e4 LT |
101 | struct neigh_table dn_neigh_table = { |
102 | .family = PF_DECnet, | |
daaba4fa | 103 | .entry_size = NEIGH_ENTRY_SIZE(sizeof(struct dn_neigh)), |
c4ea94ab | 104 | .key_len = sizeof(__le16), |
bdf53c58 | 105 | .protocol = cpu_to_be16(ETH_P_DNA_RT), |
1da177e4 | 106 | .hash = dn_neigh_hash, |
60395a20 | 107 | .key_eq = dn_key_eq, |
1da177e4 LT |
108 | .constructor = dn_neigh_construct, |
109 | .id = "dn_neigh_cache", | |
110 | .parms ={ | |
111 | .tbl = &dn_neigh_table, | |
1f9248e5 JP |
112 | .reachable_time = 30 * HZ, |
113 | .data = { | |
114 | [NEIGH_VAR_MCAST_PROBES] = 0, | |
115 | [NEIGH_VAR_UCAST_PROBES] = 0, | |
116 | [NEIGH_VAR_APP_PROBES] = 0, | |
117 | [NEIGH_VAR_RETRANS_TIME] = 1 * HZ, | |
118 | [NEIGH_VAR_BASE_REACHABLE_TIME] = 30 * HZ, | |
119 | [NEIGH_VAR_DELAY_PROBE_TIME] = 5 * HZ, | |
120 | [NEIGH_VAR_GC_STALETIME] = 60 * HZ, | |
121 | [NEIGH_VAR_QUEUE_LEN_BYTES] = 64*1024, | |
122 | [NEIGH_VAR_PROXY_QLEN] = 0, | |
123 | [NEIGH_VAR_ANYCAST_DELAY] = 0, | |
124 | [NEIGH_VAR_PROXY_DELAY] = 0, | |
125 | [NEIGH_VAR_LOCKTIME] = 1 * HZ, | |
126 | }, | |
1da177e4 LT |
127 | }, |
128 | .gc_interval = 30 * HZ, | |
129 | .gc_thresh1 = 128, | |
130 | .gc_thresh2 = 512, | |
131 | .gc_thresh3 = 1024, | |
132 | }; | |
133 | ||
1da177e4 LT |
134 | static int dn_neigh_construct(struct neighbour *neigh) |
135 | { | |
136 | struct net_device *dev = neigh->dev; | |
137 | struct dn_neigh *dn = (struct dn_neigh *)neigh; | |
138 | struct dn_dev *dn_db; | |
139 | struct neigh_parms *parms; | |
140 | ||
141 | rcu_read_lock(); | |
142 | dn_db = rcu_dereference(dev->dn_ptr); | |
143 | if (dn_db == NULL) { | |
144 | rcu_read_unlock(); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | parms = dn_db->neigh_parms; | |
149 | if (!parms) { | |
150 | rcu_read_unlock(); | |
151 | return -EINVAL; | |
152 | } | |
153 | ||
154 | __neigh_parms_put(neigh->parms); | |
155 | neigh->parms = neigh_parms_clone(parms); | |
1da177e4 LT |
156 | |
157 | if (dn_db->use_long) | |
158 | neigh->ops = &dn_long_ops; | |
159 | else | |
160 | neigh->ops = &dn_short_ops; | |
1f07247d | 161 | rcu_read_unlock(); |
1da177e4 LT |
162 | |
163 | if (dn->flags & DN_NDFLAG_P3) | |
164 | neigh->ops = &dn_phase3_ops; | |
165 | ||
166 | neigh->nud_state = NUD_NOARP; | |
167 | neigh->output = neigh->ops->connected_output; | |
168 | ||
169 | if ((dev->type == ARPHRD_IPGRE) || (dev->flags & IFF_POINTOPOINT)) | |
170 | memcpy(neigh->ha, dev->broadcast, dev->addr_len); | |
171 | else if ((dev->type == ARPHRD_ETHER) || (dev->type == ARPHRD_LOOPBACK)) | |
172 | dn_dn2eth(neigh->ha, dn->addr); | |
173 | else { | |
e87cc472 JP |
174 | net_dbg_ratelimited("Trying to create neigh for hw %d\n", |
175 | dev->type); | |
1da177e4 LT |
176 | return -EINVAL; |
177 | } | |
178 | ||
179 | /* | |
180 | * Make an estimate of the remote block size by assuming that its | |
181 | * two less then the device mtu, which it true for ethernet (and | |
182 | * other things which support long format headers) since there is | |
183 | * an extra length field (of 16 bits) which isn't part of the | |
184 | * ethernet headers and which the DECnet specs won't admit is part | |
185 | * of the DECnet routing headers either. | |
186 | * | |
187 | * If we over estimate here its no big deal, the NSP negotiations | |
188 | * will prevent us from sending packets which are too large for the | |
189 | * remote node to handle. In any case this figure is normally updated | |
190 | * by a hello message in most cases. | |
191 | */ | |
192 | dn->blksize = dev->mtu - 2; | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | static void dn_long_error_report(struct neighbour *neigh, struct sk_buff *skb) | |
198 | { | |
199 | printk(KERN_DEBUG "dn_long_error_report: called\n"); | |
200 | kfree_skb(skb); | |
201 | } | |
202 | ||
203 | ||
204 | static void dn_short_error_report(struct neighbour *neigh, struct sk_buff *skb) | |
205 | { | |
206 | printk(KERN_DEBUG "dn_short_error_report: called\n"); | |
207 | kfree_skb(skb); | |
208 | } | |
209 | ||
210 | static int dn_neigh_output_packet(struct sk_buff *skb) | |
211 | { | |
adf30907 | 212 | struct dst_entry *dst = skb_dst(skb); |
1da177e4 | 213 | struct dn_route *rt = (struct dn_route *)dst; |
fccd7d5c | 214 | struct neighbour *neigh = rt->n; |
1da177e4 LT |
215 | struct net_device *dev = neigh->dev; |
216 | char mac_addr[ETH_ALEN]; | |
3329bdfc DM |
217 | unsigned int seq; |
218 | int err; | |
1da177e4 LT |
219 | |
220 | dn_dn2eth(mac_addr, rt->rt_local_src); | |
3329bdfc DM |
221 | do { |
222 | seq = read_seqbegin(&neigh->ha_lock); | |
223 | err = dev_hard_header(skb, dev, ntohs(skb->protocol), | |
224 | neigh->ha, mac_addr, skb->len); | |
225 | } while (read_seqretry(&neigh->ha_lock, seq)); | |
226 | ||
227 | if (err >= 0) | |
228 | err = dev_queue_xmit(skb); | |
229 | else { | |
230 | kfree_skb(skb); | |
231 | err = -EINVAL; | |
232 | } | |
233 | return err; | |
1da177e4 LT |
234 | } |
235 | ||
8f40b161 | 236 | static int dn_long_output(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 237 | { |
1da177e4 LT |
238 | struct net_device *dev = neigh->dev; |
239 | int headroom = dev->hard_header_len + sizeof(struct dn_long_packet) + 3; | |
240 | unsigned char *data; | |
241 | struct dn_long_packet *lp; | |
242 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
243 | ||
244 | ||
245 | if (skb_headroom(skb) < headroom) { | |
246 | struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom); | |
247 | if (skb2 == NULL) { | |
e87cc472 | 248 | net_crit_ratelimited("dn_long_output: no memory\n"); |
1da177e4 LT |
249 | kfree_skb(skb); |
250 | return -ENOBUFS; | |
251 | } | |
5d0ba55b | 252 | consume_skb(skb); |
1da177e4 | 253 | skb = skb2; |
e87cc472 | 254 | net_info_ratelimited("dn_long_output: Increasing headroom\n"); |
1da177e4 LT |
255 | } |
256 | ||
257 | data = skb_push(skb, sizeof(struct dn_long_packet) + 3); | |
258 | lp = (struct dn_long_packet *)(data+3); | |
259 | ||
c4106aa8 | 260 | *((__le16 *)data) = cpu_to_le16(skb->len - 2); |
1da177e4 LT |
261 | *(data + 2) = 1 | DN_RT_F_PF; /* Padding */ |
262 | ||
263 | lp->msgflg = DN_RT_PKT_LONG|(cb->rt_flags&(DN_RT_F_IE|DN_RT_F_RQR|DN_RT_F_RTS)); | |
264 | lp->d_area = lp->d_subarea = 0; | |
c4ea94ab | 265 | dn_dn2eth(lp->d_id, cb->dst); |
1da177e4 | 266 | lp->s_area = lp->s_subarea = 0; |
c4ea94ab | 267 | dn_dn2eth(lp->s_id, cb->src); |
1da177e4 LT |
268 | lp->nl2 = 0; |
269 | lp->visit_ct = cb->hops & 0x3f; | |
270 | lp->s_class = 0; | |
271 | lp->pt = 0; | |
272 | ||
c1d2bbe1 | 273 | skb_reset_network_header(skb); |
1da177e4 | 274 | |
5d877d87 JE |
275 | return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL, |
276 | neigh->dev, dn_neigh_output_packet); | |
1da177e4 LT |
277 | } |
278 | ||
8f40b161 | 279 | static int dn_short_output(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 280 | { |
1da177e4 LT |
281 | struct net_device *dev = neigh->dev; |
282 | int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2; | |
283 | struct dn_short_packet *sp; | |
284 | unsigned char *data; | |
285 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
286 | ||
287 | ||
429eb0fa YH |
288 | if (skb_headroom(skb) < headroom) { |
289 | struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom); | |
290 | if (skb2 == NULL) { | |
e87cc472 | 291 | net_crit_ratelimited("dn_short_output: no memory\n"); |
429eb0fa YH |
292 | kfree_skb(skb); |
293 | return -ENOBUFS; | |
294 | } | |
5d0ba55b | 295 | consume_skb(skb); |
429eb0fa | 296 | skb = skb2; |
e87cc472 | 297 | net_info_ratelimited("dn_short_output: Increasing headroom\n"); |
429eb0fa | 298 | } |
1da177e4 LT |
299 | |
300 | data = skb_push(skb, sizeof(struct dn_short_packet) + 2); | |
c4106aa8 | 301 | *((__le16 *)data) = cpu_to_le16(skb->len - 2); |
1da177e4 LT |
302 | sp = (struct dn_short_packet *)(data+2); |
303 | ||
304 | sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS)); | |
305 | sp->dstnode = cb->dst; | |
306 | sp->srcnode = cb->src; | |
307 | sp->forward = cb->hops & 0x3f; | |
308 | ||
c1d2bbe1 | 309 | skb_reset_network_header(skb); |
1da177e4 | 310 | |
5d877d87 JE |
311 | return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL, |
312 | neigh->dev, dn_neigh_output_packet); | |
1da177e4 LT |
313 | } |
314 | ||
315 | /* | |
316 | * Phase 3 output is the same is short output, execpt that | |
317 | * it clears the area bits before transmission. | |
318 | */ | |
8f40b161 | 319 | static int dn_phase3_output(struct neighbour *neigh, struct sk_buff *skb) |
1da177e4 | 320 | { |
1da177e4 LT |
321 | struct net_device *dev = neigh->dev; |
322 | int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2; | |
323 | struct dn_short_packet *sp; | |
324 | unsigned char *data; | |
325 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
326 | ||
327 | if (skb_headroom(skb) < headroom) { | |
328 | struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom); | |
329 | if (skb2 == NULL) { | |
e87cc472 | 330 | net_crit_ratelimited("dn_phase3_output: no memory\n"); |
1da177e4 LT |
331 | kfree_skb(skb); |
332 | return -ENOBUFS; | |
333 | } | |
5d0ba55b | 334 | consume_skb(skb); |
1da177e4 | 335 | skb = skb2; |
e87cc472 | 336 | net_info_ratelimited("dn_phase3_output: Increasing headroom\n"); |
1da177e4 LT |
337 | } |
338 | ||
339 | data = skb_push(skb, sizeof(struct dn_short_packet) + 2); | |
c4106aa8 | 340 | *((__le16 *)data) = cpu_to_le16(skb->len - 2); |
1da177e4 LT |
341 | sp = (struct dn_short_packet *)(data + 2); |
342 | ||
343 | sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS)); | |
c4106aa8 HH |
344 | sp->dstnode = cb->dst & cpu_to_le16(0x03ff); |
345 | sp->srcnode = cb->src & cpu_to_le16(0x03ff); | |
1da177e4 LT |
346 | sp->forward = cb->hops & 0x3f; |
347 | ||
c1d2bbe1 | 348 | skb_reset_network_header(skb); |
1da177e4 | 349 | |
5d877d87 JE |
350 | return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL, |
351 | neigh->dev, dn_neigh_output_packet); | |
1da177e4 LT |
352 | } |
353 | ||
354 | /* | |
355 | * Unfortunately, the neighbour code uses the device in its hash | |
356 | * function, so we don't get any advantage from it. This function | |
357 | * basically does a neigh_lookup(), but without comparing the device | |
358 | * field. This is required for the On-Ethernet cache | |
359 | */ | |
360 | ||
361 | /* | |
362 | * Pointopoint link receives a hello message | |
363 | */ | |
364 | void dn_neigh_pointopoint_hello(struct sk_buff *skb) | |
365 | { | |
366 | kfree_skb(skb); | |
367 | } | |
368 | ||
369 | /* | |
370 | * Ethernet router hello message received | |
371 | */ | |
372 | int dn_neigh_router_hello(struct sk_buff *skb) | |
373 | { | |
374 | struct rtnode_hello_message *msg = (struct rtnode_hello_message *)skb->data; | |
375 | ||
376 | struct neighbour *neigh; | |
377 | struct dn_neigh *dn; | |
378 | struct dn_dev *dn_db; | |
c4ea94ab | 379 | __le16 src; |
1da177e4 | 380 | |
c4ea94ab | 381 | src = dn_eth2dn(msg->id); |
1da177e4 LT |
382 | |
383 | neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1); | |
384 | ||
385 | dn = (struct dn_neigh *)neigh; | |
386 | ||
387 | if (neigh) { | |
388 | write_lock(&neigh->lock); | |
389 | ||
390 | neigh->used = jiffies; | |
fc766e4c | 391 | dn_db = rcu_dereference(neigh->dev->dn_ptr); |
1da177e4 LT |
392 | |
393 | if (!(neigh->nud_state & NUD_PERMANENT)) { | |
394 | neigh->updated = jiffies; | |
395 | ||
396 | if (neigh->dev->type == ARPHRD_ETHER) | |
397 | memcpy(neigh->ha, ð_hdr(skb)->h_source, ETH_ALEN); | |
398 | ||
c4106aa8 | 399 | dn->blksize = le16_to_cpu(msg->blksize); |
1da177e4 LT |
400 | dn->priority = msg->priority; |
401 | ||
402 | dn->flags &= ~DN_NDFLAG_P3; | |
403 | ||
06f8fe11 JP |
404 | switch (msg->iinfo & DN_RT_INFO_TYPE) { |
405 | case DN_RT_INFO_L1RT: | |
406 | dn->flags &=~DN_NDFLAG_R2; | |
407 | dn->flags |= DN_NDFLAG_R1; | |
408 | break; | |
409 | case DN_RT_INFO_L2RT: | |
410 | dn->flags |= DN_NDFLAG_R2; | |
1da177e4 LT |
411 | } |
412 | } | |
413 | ||
5062430c | 414 | /* Only use routers in our area */ |
c4106aa8 | 415 | if ((le16_to_cpu(src)>>10) == (le16_to_cpu((decnet_address))>>10)) { |
5062430c PC |
416 | if (!dn_db->router) { |
417 | dn_db->router = neigh_clone(neigh); | |
418 | } else { | |
419 | if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority) | |
420 | neigh_release(xchg(&dn_db->router, neigh_clone(neigh))); | |
421 | } | |
1da177e4 LT |
422 | } |
423 | write_unlock(&neigh->lock); | |
424 | neigh_release(neigh); | |
425 | } | |
426 | ||
427 | kfree_skb(skb); | |
428 | return 0; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Endnode hello message received | |
433 | */ | |
434 | int dn_neigh_endnode_hello(struct sk_buff *skb) | |
435 | { | |
436 | struct endnode_hello_message *msg = (struct endnode_hello_message *)skb->data; | |
437 | struct neighbour *neigh; | |
438 | struct dn_neigh *dn; | |
c4ea94ab | 439 | __le16 src; |
1da177e4 | 440 | |
c4ea94ab | 441 | src = dn_eth2dn(msg->id); |
1da177e4 LT |
442 | |
443 | neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1); | |
444 | ||
445 | dn = (struct dn_neigh *)neigh; | |
446 | ||
447 | if (neigh) { | |
448 | write_lock(&neigh->lock); | |
449 | ||
450 | neigh->used = jiffies; | |
451 | ||
452 | if (!(neigh->nud_state & NUD_PERMANENT)) { | |
453 | neigh->updated = jiffies; | |
454 | ||
455 | if (neigh->dev->type == ARPHRD_ETHER) | |
456 | memcpy(neigh->ha, ð_hdr(skb)->h_source, ETH_ALEN); | |
457 | dn->flags &= ~(DN_NDFLAG_R1 | DN_NDFLAG_R2); | |
c4106aa8 | 458 | dn->blksize = le16_to_cpu(msg->blksize); |
1da177e4 LT |
459 | dn->priority = 0; |
460 | } | |
461 | ||
462 | write_unlock(&neigh->lock); | |
463 | neigh_release(neigh); | |
464 | } | |
465 | ||
466 | kfree_skb(skb); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static char *dn_find_slot(char *base, int max, int priority) | |
471 | { | |
472 | int i; | |
473 | unsigned char *min = NULL; | |
474 | ||
475 | base += 6; /* skip first id */ | |
476 | ||
477 | for(i = 0; i < max; i++) { | |
478 | if (!min || (*base < *min)) | |
479 | min = base; | |
480 | base += 7; /* find next priority */ | |
481 | } | |
482 | ||
483 | if (!min) | |
484 | return NULL; | |
485 | ||
486 | return (*min < priority) ? (min - 6) : NULL; | |
487 | } | |
488 | ||
489 | struct elist_cb_state { | |
490 | struct net_device *dev; | |
491 | unsigned char *ptr; | |
492 | unsigned char *rs; | |
493 | int t, n; | |
494 | }; | |
495 | ||
496 | static void neigh_elist_cb(struct neighbour *neigh, void *_info) | |
497 | { | |
498 | struct elist_cb_state *s = _info; | |
1da177e4 LT |
499 | struct dn_neigh *dn; |
500 | ||
501 | if (neigh->dev != s->dev) | |
502 | return; | |
503 | ||
504 | dn = (struct dn_neigh *) neigh; | |
505 | if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2))) | |
506 | return; | |
507 | ||
1da177e4 LT |
508 | if (s->t == s->n) |
509 | s->rs = dn_find_slot(s->ptr, s->n, dn->priority); | |
510 | else | |
511 | s->t++; | |
512 | if (s->rs == NULL) | |
513 | return; | |
514 | ||
515 | dn_dn2eth(s->rs, dn->addr); | |
516 | s->rs += 6; | |
517 | *(s->rs) = neigh->nud_state & NUD_CONNECTED ? 0x80 : 0x0; | |
518 | *(s->rs) |= dn->priority; | |
519 | s->rs++; | |
520 | } | |
521 | ||
522 | int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n) | |
523 | { | |
524 | struct elist_cb_state state; | |
525 | ||
526 | state.dev = dev; | |
527 | state.t = 0; | |
528 | state.n = n; | |
529 | state.ptr = ptr; | |
530 | state.rs = ptr; | |
531 | ||
532 | neigh_for_each(&dn_neigh_table, neigh_elist_cb, &state); | |
533 | ||
534 | return state.t; | |
535 | } | |
536 | ||
537 | ||
538 | #ifdef CONFIG_PROC_FS | |
539 | ||
540 | static inline void dn_neigh_format_entry(struct seq_file *seq, | |
541 | struct neighbour *n) | |
542 | { | |
543 | struct dn_neigh *dn = (struct dn_neigh *) n; | |
544 | char buf[DN_ASCBUF_LEN]; | |
545 | ||
546 | read_lock(&n->lock); | |
547 | seq_printf(seq, "%-7s %s%s%s %02x %02d %07ld %-8s\n", | |
c4106aa8 | 548 | dn_addr2asc(le16_to_cpu(dn->addr), buf), |
1da177e4 LT |
549 | (dn->flags&DN_NDFLAG_R1) ? "1" : "-", |
550 | (dn->flags&DN_NDFLAG_R2) ? "2" : "-", | |
551 | (dn->flags&DN_NDFLAG_P3) ? "3" : "-", | |
552 | dn->n.nud_state, | |
553 | atomic_read(&dn->n.refcnt), | |
554 | dn->blksize, | |
555 | (dn->n.dev) ? dn->n.dev->name : "?"); | |
556 | read_unlock(&n->lock); | |
557 | } | |
558 | ||
559 | static int dn_neigh_seq_show(struct seq_file *seq, void *v) | |
560 | { | |
561 | if (v == SEQ_START_TOKEN) { | |
562 | seq_puts(seq, "Addr Flags State Use Blksize Dev\n"); | |
563 | } else { | |
564 | dn_neigh_format_entry(seq, v); | |
565 | } | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | static void *dn_neigh_seq_start(struct seq_file *seq, loff_t *pos) | |
571 | { | |
572 | return neigh_seq_start(seq, pos, &dn_neigh_table, | |
573 | NEIGH_SEQ_NEIGH_ONLY); | |
574 | } | |
575 | ||
56b3d975 | 576 | static const struct seq_operations dn_neigh_seq_ops = { |
1da177e4 LT |
577 | .start = dn_neigh_seq_start, |
578 | .next = neigh_seq_next, | |
579 | .stop = neigh_seq_stop, | |
580 | .show = dn_neigh_seq_show, | |
581 | }; | |
582 | ||
583 | static int dn_neigh_seq_open(struct inode *inode, struct file *file) | |
584 | { | |
426b5303 EB |
585 | return seq_open_net(inode, file, &dn_neigh_seq_ops, |
586 | sizeof(struct neigh_seq_state)); | |
1da177e4 LT |
587 | } |
588 | ||
9a32144e | 589 | static const struct file_operations dn_neigh_seq_fops = { |
1da177e4 LT |
590 | .owner = THIS_MODULE, |
591 | .open = dn_neigh_seq_open, | |
592 | .read = seq_read, | |
593 | .llseek = seq_lseek, | |
426b5303 | 594 | .release = seq_release_net, |
1da177e4 LT |
595 | }; |
596 | ||
597 | #endif | |
598 | ||
599 | void __init dn_neigh_init(void) | |
600 | { | |
d7480fd3 | 601 | neigh_table_init(NEIGH_DN_TABLE, &dn_neigh_table); |
d4beaa66 G |
602 | proc_create("decnet_neigh", S_IRUGO, init_net.proc_net, |
603 | &dn_neigh_seq_fops); | |
1da177e4 LT |
604 | } |
605 | ||
606 | void __exit dn_neigh_cleanup(void) | |
607 | { | |
ece31ffd | 608 | remove_proc_entry("decnet_neigh", init_net.proc_net); |
d7480fd3 | 609 | neigh_table_clear(NEIGH_DN_TABLE, &dn_neigh_table); |
1da177e4 | 610 | } |