blob: deb723dba44b62d8aca89aa15d9ea332001f004a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09006 * DECnet Neighbour Functions (Adjacency Database and
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/net.h>
28#include <linux/module.h>
29#include <linux/socket.h>
30#include <linux/if_arp.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090031#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#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>
41#include <asm/atomic.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020042#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#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
51static u32 dn_neigh_hash(const void *pkey, const struct net_device *dev);
52static int dn_neigh_construct(struct neighbour *);
53static void dn_long_error_report(struct neighbour *, struct sk_buff *);
54static void dn_short_error_report(struct neighbour *, struct sk_buff *);
55static int dn_long_output(struct sk_buff *);
56static int dn_short_output(struct sk_buff *);
57static int dn_phase3_output(struct sk_buff *);
58
59
60/*
61 * For talking to broadcast devices: Ethernet & PPP
62 */
Stephen Hemminger89d69d22009-09-01 11:13:19 +000063static const struct neigh_ops dn_long_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 .family = AF_DECnet,
65 .error_report = dn_long_error_report,
66 .output = dn_long_output,
67 .connected_output = dn_long_output,
68 .hh_output = dev_queue_xmit,
69 .queue_xmit = dev_queue_xmit,
70};
71
72/*
73 * For talking to pointopoint and multidrop devices: DDCMP and X.25
74 */
Stephen Hemminger89d69d22009-09-01 11:13:19 +000075static const struct neigh_ops dn_short_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 .family = AF_DECnet,
77 .error_report = dn_short_error_report,
78 .output = dn_short_output,
79 .connected_output = dn_short_output,
80 .hh_output = dev_queue_xmit,
81 .queue_xmit = dev_queue_xmit,
82};
83
84/*
85 * For talking to DECnet phase III nodes
86 */
Stephen Hemminger89d69d22009-09-01 11:13:19 +000087static const struct neigh_ops dn_phase3_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 .family = AF_DECnet,
89 .error_report = dn_short_error_report, /* Can use short version here */
90 .output = dn_phase3_output,
91 .connected_output = dn_phase3_output,
92 .hh_output = dev_queue_xmit,
93 .queue_xmit = dev_queue_xmit
94};
95
96struct neigh_table dn_neigh_table = {
97 .family = PF_DECnet,
98 .entry_size = sizeof(struct dn_neigh),
Steven Whitehousec4ea94a2006-03-20 22:42:39 -080099 .key_len = sizeof(__le16),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 .hash = dn_neigh_hash,
101 .constructor = dn_neigh_construct,
102 .id = "dn_neigh_cache",
103 .parms ={
104 .tbl = &dn_neigh_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 .base_reachable_time = 30 * HZ,
106 .retrans_time = 1 * HZ,
107 .gc_staletime = 60 * HZ,
108 .reachable_time = 30 * HZ,
109 .delay_probe_time = 5 * HZ,
110 .queue_len = 3,
111 .ucast_probes = 0,
112 .app_probes = 0,
113 .mcast_probes = 0,
114 .anycast_delay = 0,
115 .proxy_delay = 0,
116 .proxy_qlen = 0,
117 .locktime = 1 * HZ,
118 },
119 .gc_interval = 30 * HZ,
120 .gc_thresh1 = 128,
121 .gc_thresh2 = 512,
122 .gc_thresh3 = 1024,
123};
124
125static u32 dn_neigh_hash(const void *pkey, const struct net_device *dev)
126{
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800127 return jhash_2words(*(__u16 *)pkey, 0, dn_neigh_table.hash_rnd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
129
130static int dn_neigh_construct(struct neighbour *neigh)
131{
132 struct net_device *dev = neigh->dev;
133 struct dn_neigh *dn = (struct dn_neigh *)neigh;
134 struct dn_dev *dn_db;
135 struct neigh_parms *parms;
136
137 rcu_read_lock();
138 dn_db = rcu_dereference(dev->dn_ptr);
139 if (dn_db == NULL) {
140 rcu_read_unlock();
141 return -EINVAL;
142 }
143
144 parms = dn_db->neigh_parms;
145 if (!parms) {
146 rcu_read_unlock();
147 return -EINVAL;
148 }
149
150 __neigh_parms_put(neigh->parms);
151 neigh->parms = neigh_parms_clone(parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 if (dn_db->use_long)
154 neigh->ops = &dn_long_ops;
155 else
156 neigh->ops = &dn_short_ops;
Paul E. McKenney1f072472005-08-17 12:05:27 -0700157 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159 if (dn->flags & DN_NDFLAG_P3)
160 neigh->ops = &dn_phase3_ops;
161
162 neigh->nud_state = NUD_NOARP;
163 neigh->output = neigh->ops->connected_output;
164
165 if ((dev->type == ARPHRD_IPGRE) || (dev->flags & IFF_POINTOPOINT))
166 memcpy(neigh->ha, dev->broadcast, dev->addr_len);
167 else if ((dev->type == ARPHRD_ETHER) || (dev->type == ARPHRD_LOOPBACK))
168 dn_dn2eth(neigh->ha, dn->addr);
169 else {
170 if (net_ratelimit())
171 printk(KERN_DEBUG "Trying to create neigh for hw %d\n", dev->type);
172 return -EINVAL;
173 }
174
175 /*
176 * Make an estimate of the remote block size by assuming that its
177 * two less then the device mtu, which it true for ethernet (and
178 * other things which support long format headers) since there is
179 * an extra length field (of 16 bits) which isn't part of the
180 * ethernet headers and which the DECnet specs won't admit is part
181 * of the DECnet routing headers either.
182 *
183 * If we over estimate here its no big deal, the NSP negotiations
184 * will prevent us from sending packets which are too large for the
185 * remote node to handle. In any case this figure is normally updated
186 * by a hello message in most cases.
187 */
188 dn->blksize = dev->mtu - 2;
189
190 return 0;
191}
192
193static void dn_long_error_report(struct neighbour *neigh, struct sk_buff *skb)
194{
195 printk(KERN_DEBUG "dn_long_error_report: called\n");
196 kfree_skb(skb);
197}
198
199
200static void dn_short_error_report(struct neighbour *neigh, struct sk_buff *skb)
201{
202 printk(KERN_DEBUG "dn_short_error_report: called\n");
203 kfree_skb(skb);
204}
205
206static int dn_neigh_output_packet(struct sk_buff *skb)
207{
Eric Dumazetadf30902009-06-02 05:19:30 +0000208 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 struct dn_route *rt = (struct dn_route *)dst;
210 struct neighbour *neigh = dst->neighbour;
211 struct net_device *dev = neigh->dev;
212 char mac_addr[ETH_ALEN];
213
214 dn_dn2eth(mac_addr, rt->rt_local_src);
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700215 if (dev_hard_header(skb, dev, ntohs(skb->protocol), neigh->ha,
216 mac_addr, skb->len) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 return neigh->ops->queue_xmit(skb);
218
219 if (net_ratelimit())
220 printk(KERN_DEBUG "dn_neigh_output_packet: oops, can't send packet\n");
221
222 kfree_skb(skb);
223 return -EINVAL;
224}
225
226static int dn_long_output(struct sk_buff *skb)
227{
Eric Dumazetadf30902009-06-02 05:19:30 +0000228 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 struct neighbour *neigh = dst->neighbour;
230 struct net_device *dev = neigh->dev;
231 int headroom = dev->hard_header_len + sizeof(struct dn_long_packet) + 3;
232 unsigned char *data;
233 struct dn_long_packet *lp;
234 struct dn_skb_cb *cb = DN_SKB_CB(skb);
235
236
237 if (skb_headroom(skb) < headroom) {
238 struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
239 if (skb2 == NULL) {
240 if (net_ratelimit())
241 printk(KERN_CRIT "dn_long_output: no memory\n");
242 kfree_skb(skb);
243 return -ENOBUFS;
244 }
245 kfree_skb(skb);
246 skb = skb2;
247 if (net_ratelimit())
248 printk(KERN_INFO "dn_long_output: Increasing headroom\n");
249 }
250
251 data = skb_push(skb, sizeof(struct dn_long_packet) + 3);
252 lp = (struct dn_long_packet *)(data+3);
253
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800254 *((__le16 *)data) = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 *(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;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800259 dn_dn2eth(lp->d_id, cb->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 lp->s_area = lp->s_subarea = 0;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800261 dn_dn2eth(lp->s_id, cb->src);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 lp->nl2 = 0;
263 lp->visit_ct = cb->hops & 0x3f;
264 lp->s_class = 0;
265 lp->pt = 0;
266
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700267 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 return NF_HOOK(PF_DECnet, NF_DN_POST_ROUTING, skb, NULL, neigh->dev, dn_neigh_output_packet);
270}
271
272static int dn_short_output(struct sk_buff *skb)
273{
Eric Dumazetadf30902009-06-02 05:19:30 +0000274 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 struct neighbour *neigh = dst->neighbour;
276 struct net_device *dev = neigh->dev;
277 int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
278 struct dn_short_packet *sp;
279 unsigned char *data;
280 struct dn_skb_cb *cb = DN_SKB_CB(skb);
281
282
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900283 if (skb_headroom(skb) < headroom) {
284 struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
285 if (skb2 == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (net_ratelimit())
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900287 printk(KERN_CRIT "dn_short_output: no memory\n");
288 kfree_skb(skb);
289 return -ENOBUFS;
290 }
291 kfree_skb(skb);
292 skb = skb2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 if (net_ratelimit())
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900294 printk(KERN_INFO "dn_short_output: Increasing headroom\n");
295 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800298 *((__le16 *)data) = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 sp = (struct dn_short_packet *)(data+2);
300
301 sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
302 sp->dstnode = cb->dst;
303 sp->srcnode = cb->src;
304 sp->forward = cb->hops & 0x3f;
305
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700306 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308 return NF_HOOK(PF_DECnet, NF_DN_POST_ROUTING, skb, NULL, neigh->dev, dn_neigh_output_packet);
309}
310
311/*
312 * Phase 3 output is the same is short output, execpt that
313 * it clears the area bits before transmission.
314 */
315static int dn_phase3_output(struct sk_buff *skb)
316{
Eric Dumazetadf30902009-06-02 05:19:30 +0000317 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 struct neighbour *neigh = dst->neighbour;
319 struct net_device *dev = neigh->dev;
320 int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
321 struct dn_short_packet *sp;
322 unsigned char *data;
323 struct dn_skb_cb *cb = DN_SKB_CB(skb);
324
325 if (skb_headroom(skb) < headroom) {
326 struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
327 if (skb2 == NULL) {
328 if (net_ratelimit())
329 printk(KERN_CRIT "dn_phase3_output: no memory\n");
330 kfree_skb(skb);
331 return -ENOBUFS;
332 }
333 kfree_skb(skb);
334 skb = skb2;
335 if (net_ratelimit())
336 printk(KERN_INFO "dn_phase3_output: Increasing headroom\n");
337 }
338
339 data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800340 *((__le16 *)data) = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 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));
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800344 sp->dstnode = cb->dst & cpu_to_le16(0x03ff);
345 sp->srcnode = cb->src & cpu_to_le16(0x03ff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 sp->forward = cb->hops & 0x3f;
347
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700348 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350 return NF_HOOK(PF_DECnet, NF_DN_POST_ROUTING, skb, NULL, neigh->dev, dn_neigh_output_packet);
351}
352
353/*
354 * Unfortunately, the neighbour code uses the device in its hash
355 * function, so we don't get any advantage from it. This function
356 * basically does a neigh_lookup(), but without comparing the device
357 * field. This is required for the On-Ethernet cache
358 */
359
360/*
361 * Pointopoint link receives a hello message
362 */
363void dn_neigh_pointopoint_hello(struct sk_buff *skb)
364{
365 kfree_skb(skb);
366}
367
368/*
369 * Ethernet router hello message received
370 */
371int dn_neigh_router_hello(struct sk_buff *skb)
372{
373 struct rtnode_hello_message *msg = (struct rtnode_hello_message *)skb->data;
374
375 struct neighbour *neigh;
376 struct dn_neigh *dn;
377 struct dn_dev *dn_db;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800378 __le16 src;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800380 src = dn_eth2dn(msg->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382 neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
383
384 dn = (struct dn_neigh *)neigh;
385
386 if (neigh) {
387 write_lock(&neigh->lock);
388
389 neigh->used = jiffies;
390 dn_db = (struct dn_dev *)neigh->dev->dn_ptr;
391
392 if (!(neigh->nud_state & NUD_PERMANENT)) {
393 neigh->updated = jiffies;
394
395 if (neigh->dev->type == ARPHRD_ETHER)
396 memcpy(neigh->ha, &eth_hdr(skb)->h_source, ETH_ALEN);
397
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800398 dn->blksize = le16_to_cpu(msg->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 dn->priority = msg->priority;
400
401 dn->flags &= ~DN_NDFLAG_P3;
402
403 switch(msg->iinfo & DN_RT_INFO_TYPE) {
404 case DN_RT_INFO_L1RT:
405 dn->flags &=~DN_NDFLAG_R2;
406 dn->flags |= DN_NDFLAG_R1;
407 break;
408 case DN_RT_INFO_L2RT:
409 dn->flags |= DN_NDFLAG_R2;
410 }
411 }
412
Patrick Caulfield50624302006-01-03 14:24:02 -0800413 /* Only use routers in our area */
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800414 if ((le16_to_cpu(src)>>10) == (le16_to_cpu((decnet_address))>>10)) {
Patrick Caulfield50624302006-01-03 14:24:02 -0800415 if (!dn_db->router) {
416 dn_db->router = neigh_clone(neigh);
417 } else {
418 if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
419 neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
420 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 }
422 write_unlock(&neigh->lock);
423 neigh_release(neigh);
424 }
425
426 kfree_skb(skb);
427 return 0;
428}
429
430/*
431 * Endnode hello message received
432 */
433int dn_neigh_endnode_hello(struct sk_buff *skb)
434{
435 struct endnode_hello_message *msg = (struct endnode_hello_message *)skb->data;
436 struct neighbour *neigh;
437 struct dn_neigh *dn;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800438 __le16 src;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800440 src = dn_eth2dn(msg->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
443
444 dn = (struct dn_neigh *)neigh;
445
446 if (neigh) {
447 write_lock(&neigh->lock);
448
449 neigh->used = jiffies;
450
451 if (!(neigh->nud_state & NUD_PERMANENT)) {
452 neigh->updated = jiffies;
453
454 if (neigh->dev->type == ARPHRD_ETHER)
455 memcpy(neigh->ha, &eth_hdr(skb)->h_source, ETH_ALEN);
456 dn->flags &= ~(DN_NDFLAG_R1 | DN_NDFLAG_R2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800457 dn->blksize = le16_to_cpu(msg->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 dn->priority = 0;
459 }
460
461 write_unlock(&neigh->lock);
462 neigh_release(neigh);
463 }
464
465 kfree_skb(skb);
466 return 0;
467}
468
469static char *dn_find_slot(char *base, int max, int priority)
470{
471 int i;
472 unsigned char *min = NULL;
473
474 base += 6; /* skip first id */
475
476 for(i = 0; i < max; i++) {
477 if (!min || (*base < *min))
478 min = base;
479 base += 7; /* find next priority */
480 }
481
482 if (!min)
483 return NULL;
484
485 return (*min < priority) ? (min - 6) : NULL;
486}
487
488struct elist_cb_state {
489 struct net_device *dev;
490 unsigned char *ptr;
491 unsigned char *rs;
492 int t, n;
493};
494
495static void neigh_elist_cb(struct neighbour *neigh, void *_info)
496{
497 struct elist_cb_state *s = _info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 struct dn_neigh *dn;
499
500 if (neigh->dev != s->dev)
501 return;
502
503 dn = (struct dn_neigh *) neigh;
504 if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2)))
505 return;
506
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 if (s->t == s->n)
508 s->rs = dn_find_slot(s->ptr, s->n, dn->priority);
509 else
510 s->t++;
511 if (s->rs == NULL)
512 return;
513
514 dn_dn2eth(s->rs, dn->addr);
515 s->rs += 6;
516 *(s->rs) = neigh->nud_state & NUD_CONNECTED ? 0x80 : 0x0;
517 *(s->rs) |= dn->priority;
518 s->rs++;
519}
520
521int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n)
522{
523 struct elist_cb_state state;
524
525 state.dev = dev;
526 state.t = 0;
527 state.n = n;
528 state.ptr = ptr;
529 state.rs = ptr;
530
531 neigh_for_each(&dn_neigh_table, neigh_elist_cb, &state);
532
533 return state.t;
534}
535
536
537#ifdef CONFIG_PROC_FS
538
539static inline void dn_neigh_format_entry(struct seq_file *seq,
540 struct neighbour *n)
541{
542 struct dn_neigh *dn = (struct dn_neigh *) n;
543 char buf[DN_ASCBUF_LEN];
544
545 read_lock(&n->lock);
546 seq_printf(seq, "%-7s %s%s%s %02x %02d %07ld %-8s\n",
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800547 dn_addr2asc(le16_to_cpu(dn->addr), buf),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 (dn->flags&DN_NDFLAG_R1) ? "1" : "-",
549 (dn->flags&DN_NDFLAG_R2) ? "2" : "-",
550 (dn->flags&DN_NDFLAG_P3) ? "3" : "-",
551 dn->n.nud_state,
552 atomic_read(&dn->n.refcnt),
553 dn->blksize,
554 (dn->n.dev) ? dn->n.dev->name : "?");
555 read_unlock(&n->lock);
556}
557
558static int dn_neigh_seq_show(struct seq_file *seq, void *v)
559{
560 if (v == SEQ_START_TOKEN) {
561 seq_puts(seq, "Addr Flags State Use Blksize Dev\n");
562 } else {
563 dn_neigh_format_entry(seq, v);
564 }
565
566 return 0;
567}
568
569static void *dn_neigh_seq_start(struct seq_file *seq, loff_t *pos)
570{
571 return neigh_seq_start(seq, pos, &dn_neigh_table,
572 NEIGH_SEQ_NEIGH_ONLY);
573}
574
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700575static const struct seq_operations dn_neigh_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 .start = dn_neigh_seq_start,
577 .next = neigh_seq_next,
578 .stop = neigh_seq_stop,
579 .show = dn_neigh_seq_show,
580};
581
582static int dn_neigh_seq_open(struct inode *inode, struct file *file)
583{
Eric W. Biederman426b5302008-01-24 00:13:18 -0800584 return seq_open_net(inode, file, &dn_neigh_seq_ops,
585 sizeof(struct neigh_seq_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
Arjan van de Ven9a321442007-02-12 00:55:35 -0800588static const struct file_operations dn_neigh_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 .owner = THIS_MODULE,
590 .open = dn_neigh_seq_open,
591 .read = seq_read,
592 .llseek = seq_lseek,
Eric W. Biederman426b5302008-01-24 00:13:18 -0800593 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594};
595
596#endif
597
598void __init dn_neigh_init(void)
599{
600 neigh_table_init(&dn_neigh_table);
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200601 proc_net_fops_create(&init_net, "decnet_neigh", S_IRUGO, &dn_neigh_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602}
603
604void __exit dn_neigh_cleanup(void)
605{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200606 proc_net_remove(&init_net, "decnet_neigh");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 neigh_table_clear(&dn_neigh_table);
608}