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