blob: a085dbcf5c7fa4fde69419dd135c8c8570bb4fb2 [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
Linus Torvalds1da177e2005-04-16 15:20:36 -070051static int dn_neigh_construct(struct neighbour *);
52static void dn_long_error_report(struct neighbour *, struct sk_buff *);
53static void dn_short_error_report(struct neighbour *, struct sk_buff *);
54static int dn_long_output(struct sk_buff *);
55static int dn_short_output(struct sk_buff *);
56static int dn_phase3_output(struct sk_buff *);
57
58
59/*
60 * For talking to broadcast devices: Ethernet & PPP
61 */
Stephen Hemminger89d69d22009-09-01 11:13:19 +000062static const struct neigh_ops dn_long_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 .family = AF_DECnet,
64 .error_report = dn_long_error_report,
65 .output = dn_long_output,
66 .connected_output = dn_long_output,
67 .hh_output = dev_queue_xmit,
68 .queue_xmit = dev_queue_xmit,
69};
70
71/*
72 * For talking to pointopoint and multidrop devices: DDCMP and X.25
73 */
Stephen Hemminger89d69d22009-09-01 11:13:19 +000074static const struct neigh_ops dn_short_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 .family = AF_DECnet,
76 .error_report = dn_short_error_report,
77 .output = dn_short_output,
78 .connected_output = dn_short_output,
79 .hh_output = dev_queue_xmit,
80 .queue_xmit = dev_queue_xmit,
81};
82
83/*
84 * For talking to DECnet phase III nodes
85 */
Stephen Hemminger89d69d22009-09-01 11:13:19 +000086static const struct neigh_ops dn_phase3_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 .family = AF_DECnet,
88 .error_report = dn_short_error_report, /* Can use short version here */
89 .output = dn_phase3_output,
90 .connected_output = dn_phase3_output,
91 .hh_output = dev_queue_xmit,
92 .queue_xmit = dev_queue_xmit
93};
94
Eric Dumazetd6bf7812010-10-04 06:15:44 +000095static u32 dn_neigh_hash(const void *pkey,
96 const struct net_device *dev,
97 __u32 hash_rnd)
98{
99 return jhash_2words(*(__u16 *)pkey, 0, hash_rnd);
100}
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102struct neigh_table dn_neigh_table = {
103 .family = PF_DECnet,
104 .entry_size = sizeof(struct dn_neigh),
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800105 .key_len = sizeof(__le16),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 .hash = dn_neigh_hash,
107 .constructor = dn_neigh_construct,
108 .id = "dn_neigh_cache",
109 .parms ={
110 .tbl = &dn_neigh_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 .base_reachable_time = 30 * HZ,
112 .retrans_time = 1 * HZ,
113 .gc_staletime = 60 * HZ,
114 .reachable_time = 30 * HZ,
115 .delay_probe_time = 5 * HZ,
116 .queue_len = 3,
117 .ucast_probes = 0,
118 .app_probes = 0,
119 .mcast_probes = 0,
120 .anycast_delay = 0,
121 .proxy_delay = 0,
122 .proxy_qlen = 0,
123 .locktime = 1 * HZ,
124 },
125 .gc_interval = 30 * HZ,
126 .gc_thresh1 = 128,
127 .gc_thresh2 = 512,
128 .gc_thresh3 = 1024,
129};
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131static int dn_neigh_construct(struct neighbour *neigh)
132{
133 struct net_device *dev = neigh->dev;
134 struct dn_neigh *dn = (struct dn_neigh *)neigh;
135 struct dn_dev *dn_db;
136 struct neigh_parms *parms;
137
138 rcu_read_lock();
139 dn_db = rcu_dereference(dev->dn_ptr);
140 if (dn_db == NULL) {
141 rcu_read_unlock();
142 return -EINVAL;
143 }
144
145 parms = dn_db->neigh_parms;
146 if (!parms) {
147 rcu_read_unlock();
148 return -EINVAL;
149 }
150
151 __neigh_parms_put(neigh->parms);
152 neigh->parms = neigh_parms_clone(parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 if (dn_db->use_long)
155 neigh->ops = &dn_long_ops;
156 else
157 neigh->ops = &dn_short_ops;
Paul E. McKenney1f072472005-08-17 12:05:27 -0700158 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 if (dn->flags & DN_NDFLAG_P3)
161 neigh->ops = &dn_phase3_ops;
162
163 neigh->nud_state = NUD_NOARP;
164 neigh->output = neigh->ops->connected_output;
165
166 if ((dev->type == ARPHRD_IPGRE) || (dev->flags & IFF_POINTOPOINT))
167 memcpy(neigh->ha, dev->broadcast, dev->addr_len);
168 else if ((dev->type == ARPHRD_ETHER) || (dev->type == ARPHRD_LOOPBACK))
169 dn_dn2eth(neigh->ha, dn->addr);
170 else {
171 if (net_ratelimit())
172 printk(KERN_DEBUG "Trying to create neigh for hw %d\n", dev->type);
173 return -EINVAL;
174 }
175
176 /*
177 * Make an estimate of the remote block size by assuming that its
178 * two less then the device mtu, which it true for ethernet (and
179 * other things which support long format headers) since there is
180 * an extra length field (of 16 bits) which isn't part of the
181 * ethernet headers and which the DECnet specs won't admit is part
182 * of the DECnet routing headers either.
183 *
184 * If we over estimate here its no big deal, the NSP negotiations
185 * will prevent us from sending packets which are too large for the
186 * remote node to handle. In any case this figure is normally updated
187 * by a hello message in most cases.
188 */
189 dn->blksize = dev->mtu - 2;
190
191 return 0;
192}
193
194static void dn_long_error_report(struct neighbour *neigh, struct sk_buff *skb)
195{
196 printk(KERN_DEBUG "dn_long_error_report: called\n");
197 kfree_skb(skb);
198}
199
200
201static void dn_short_error_report(struct neighbour *neigh, struct sk_buff *skb)
202{
203 printk(KERN_DEBUG "dn_short_error_report: called\n");
204 kfree_skb(skb);
205}
206
207static int dn_neigh_output_packet(struct sk_buff *skb)
208{
Eric Dumazetadf30902009-06-02 05:19:30 +0000209 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 struct dn_route *rt = (struct dn_route *)dst;
211 struct neighbour *neigh = dst->neighbour;
212 struct net_device *dev = neigh->dev;
213 char mac_addr[ETH_ALEN];
214
215 dn_dn2eth(mac_addr, rt->rt_local_src);
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700216 if (dev_hard_header(skb, dev, ntohs(skb->protocol), neigh->ha,
217 mac_addr, skb->len) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 return neigh->ops->queue_xmit(skb);
219
220 if (net_ratelimit())
221 printk(KERN_DEBUG "dn_neigh_output_packet: oops, can't send packet\n");
222
223 kfree_skb(skb);
224 return -EINVAL;
225}
226
227static int dn_long_output(struct sk_buff *skb)
228{
Eric Dumazetadf30902009-06-02 05:19:30 +0000229 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 struct neighbour *neigh = dst->neighbour;
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) {
241 if (net_ratelimit())
242 printk(KERN_CRIT "dn_long_output: no memory\n");
243 kfree_skb(skb);
244 return -ENOBUFS;
245 }
246 kfree_skb(skb);
247 skb = skb2;
248 if (net_ratelimit())
249 printk(KERN_INFO "dn_long_output: Increasing headroom\n");
250 }
251
252 data = skb_push(skb, sizeof(struct dn_long_packet) + 3);
253 lp = (struct dn_long_packet *)(data+3);
254
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800255 *((__le16 *)data) = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 *(data + 2) = 1 | DN_RT_F_PF; /* Padding */
257
258 lp->msgflg = DN_RT_PKT_LONG|(cb->rt_flags&(DN_RT_F_IE|DN_RT_F_RQR|DN_RT_F_RTS));
259 lp->d_area = lp->d_subarea = 0;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800260 dn_dn2eth(lp->d_id, cb->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 lp->s_area = lp->s_subarea = 0;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800262 dn_dn2eth(lp->s_id, cb->src);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 lp->nl2 = 0;
264 lp->visit_ct = cb->hops & 0x3f;
265 lp->s_class = 0;
266 lp->pt = 0;
267
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700268 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Jan Engelhardt5d877d82010-03-23 04:09:14 +0100270 return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL,
271 neigh->dev, dn_neigh_output_packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}
273
274static int dn_short_output(struct sk_buff *skb)
275{
Eric Dumazetadf30902009-06-02 05:19:30 +0000276 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 struct neighbour *neigh = dst->neighbour;
278 struct net_device *dev = neigh->dev;
279 int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
280 struct dn_short_packet *sp;
281 unsigned char *data;
282 struct dn_skb_cb *cb = DN_SKB_CB(skb);
283
284
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900285 if (skb_headroom(skb) < headroom) {
286 struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
287 if (skb2 == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (net_ratelimit())
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900289 printk(KERN_CRIT "dn_short_output: no memory\n");
290 kfree_skb(skb);
291 return -ENOBUFS;
292 }
293 kfree_skb(skb);
294 skb = skb2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 if (net_ratelimit())
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900296 printk(KERN_INFO "dn_short_output: Increasing headroom\n");
297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
299 data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800300 *((__le16 *)data) = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 sp = (struct dn_short_packet *)(data+2);
302
303 sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
304 sp->dstnode = cb->dst;
305 sp->srcnode = cb->src;
306 sp->forward = cb->hops & 0x3f;
307
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700308 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Jan Engelhardt5d877d82010-03-23 04:09:14 +0100310 return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL,
311 neigh->dev, dn_neigh_output_packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
313
314/*
315 * Phase 3 output is the same is short output, execpt that
316 * it clears the area bits before transmission.
317 */
318static int dn_phase3_output(struct sk_buff *skb)
319{
Eric Dumazetadf30902009-06-02 05:19:30 +0000320 struct dst_entry *dst = skb_dst(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 struct neighbour *neigh = dst->neighbour;
322 struct net_device *dev = neigh->dev;
323 int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
324 struct dn_short_packet *sp;
325 unsigned char *data;
326 struct dn_skb_cb *cb = DN_SKB_CB(skb);
327
328 if (skb_headroom(skb) < headroom) {
329 struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
330 if (skb2 == NULL) {
331 if (net_ratelimit())
332 printk(KERN_CRIT "dn_phase3_output: no memory\n");
333 kfree_skb(skb);
334 return -ENOBUFS;
335 }
336 kfree_skb(skb);
337 skb = skb2;
338 if (net_ratelimit())
339 printk(KERN_INFO "dn_phase3_output: Increasing headroom\n");
340 }
341
342 data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800343 *((__le16 *)data) = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 sp = (struct dn_short_packet *)(data + 2);
345
346 sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800347 sp->dstnode = cb->dst & cpu_to_le16(0x03ff);
348 sp->srcnode = cb->src & cpu_to_le16(0x03ff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 sp->forward = cb->hops & 0x3f;
350
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700351 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Jan Engelhardt5d877d82010-03-23 04:09:14 +0100353 return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING, skb, NULL,
354 neigh->dev, dn_neigh_output_packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355}
356
357/*
358 * Unfortunately, the neighbour code uses the device in its hash
359 * function, so we don't get any advantage from it. This function
360 * basically does a neigh_lookup(), but without comparing the device
361 * field. This is required for the On-Ethernet cache
362 */
363
364/*
365 * Pointopoint link receives a hello message
366 */
367void dn_neigh_pointopoint_hello(struct sk_buff *skb)
368{
369 kfree_skb(skb);
370}
371
372/*
373 * Ethernet router hello message received
374 */
375int dn_neigh_router_hello(struct sk_buff *skb)
376{
377 struct rtnode_hello_message *msg = (struct rtnode_hello_message *)skb->data;
378
379 struct neighbour *neigh;
380 struct dn_neigh *dn;
381 struct dn_dev *dn_db;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800382 __le16 src;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800384 src = dn_eth2dn(msg->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
387
388 dn = (struct dn_neigh *)neigh;
389
390 if (neigh) {
391 write_lock(&neigh->lock);
392
393 neigh->used = jiffies;
394 dn_db = (struct dn_dev *)neigh->dev->dn_ptr;
395
396 if (!(neigh->nud_state & NUD_PERMANENT)) {
397 neigh->updated = jiffies;
398
399 if (neigh->dev->type == ARPHRD_ETHER)
400 memcpy(neigh->ha, &eth_hdr(skb)->h_source, ETH_ALEN);
401
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800402 dn->blksize = le16_to_cpu(msg->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 dn->priority = msg->priority;
404
405 dn->flags &= ~DN_NDFLAG_P3;
406
407 switch(msg->iinfo & DN_RT_INFO_TYPE) {
408 case DN_RT_INFO_L1RT:
409 dn->flags &=~DN_NDFLAG_R2;
410 dn->flags |= DN_NDFLAG_R1;
411 break;
412 case DN_RT_INFO_L2RT:
413 dn->flags |= DN_NDFLAG_R2;
414 }
415 }
416
Patrick Caulfield50624302006-01-03 14:24:02 -0800417 /* Only use routers in our area */
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800418 if ((le16_to_cpu(src)>>10) == (le16_to_cpu((decnet_address))>>10)) {
Patrick Caulfield50624302006-01-03 14:24:02 -0800419 if (!dn_db->router) {
420 dn_db->router = neigh_clone(neigh);
421 } else {
422 if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
423 neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
424 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 }
426 write_unlock(&neigh->lock);
427 neigh_release(neigh);
428 }
429
430 kfree_skb(skb);
431 return 0;
432}
433
434/*
435 * Endnode hello message received
436 */
437int dn_neigh_endnode_hello(struct sk_buff *skb)
438{
439 struct endnode_hello_message *msg = (struct endnode_hello_message *)skb->data;
440 struct neighbour *neigh;
441 struct dn_neigh *dn;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800442 __le16 src;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800444 src = dn_eth2dn(msg->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446 neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
447
448 dn = (struct dn_neigh *)neigh;
449
450 if (neigh) {
451 write_lock(&neigh->lock);
452
453 neigh->used = jiffies;
454
455 if (!(neigh->nud_state & NUD_PERMANENT)) {
456 neigh->updated = jiffies;
457
458 if (neigh->dev->type == ARPHRD_ETHER)
459 memcpy(neigh->ha, &eth_hdr(skb)->h_source, ETH_ALEN);
460 dn->flags &= ~(DN_NDFLAG_R1 | DN_NDFLAG_R2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800461 dn->blksize = le16_to_cpu(msg->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 dn->priority = 0;
463 }
464
465 write_unlock(&neigh->lock);
466 neigh_release(neigh);
467 }
468
469 kfree_skb(skb);
470 return 0;
471}
472
473static char *dn_find_slot(char *base, int max, int priority)
474{
475 int i;
476 unsigned char *min = NULL;
477
478 base += 6; /* skip first id */
479
480 for(i = 0; i < max; i++) {
481 if (!min || (*base < *min))
482 min = base;
483 base += 7; /* find next priority */
484 }
485
486 if (!min)
487 return NULL;
488
489 return (*min < priority) ? (min - 6) : NULL;
490}
491
492struct elist_cb_state {
493 struct net_device *dev;
494 unsigned char *ptr;
495 unsigned char *rs;
496 int t, n;
497};
498
499static void neigh_elist_cb(struct neighbour *neigh, void *_info)
500{
501 struct elist_cb_state *s = _info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 struct dn_neigh *dn;
503
504 if (neigh->dev != s->dev)
505 return;
506
507 dn = (struct dn_neigh *) neigh;
508 if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2)))
509 return;
510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 if (s->t == s->n)
512 s->rs = dn_find_slot(s->ptr, s->n, dn->priority);
513 else
514 s->t++;
515 if (s->rs == NULL)
516 return;
517
518 dn_dn2eth(s->rs, dn->addr);
519 s->rs += 6;
520 *(s->rs) = neigh->nud_state & NUD_CONNECTED ? 0x80 : 0x0;
521 *(s->rs) |= dn->priority;
522 s->rs++;
523}
524
525int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n)
526{
527 struct elist_cb_state state;
528
529 state.dev = dev;
530 state.t = 0;
531 state.n = n;
532 state.ptr = ptr;
533 state.rs = ptr;
534
535 neigh_for_each(&dn_neigh_table, neigh_elist_cb, &state);
536
537 return state.t;
538}
539
540
541#ifdef CONFIG_PROC_FS
542
543static inline void dn_neigh_format_entry(struct seq_file *seq,
544 struct neighbour *n)
545{
546 struct dn_neigh *dn = (struct dn_neigh *) n;
547 char buf[DN_ASCBUF_LEN];
548
549 read_lock(&n->lock);
550 seq_printf(seq, "%-7s %s%s%s %02x %02d %07ld %-8s\n",
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800551 dn_addr2asc(le16_to_cpu(dn->addr), buf),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 (dn->flags&DN_NDFLAG_R1) ? "1" : "-",
553 (dn->flags&DN_NDFLAG_R2) ? "2" : "-",
554 (dn->flags&DN_NDFLAG_P3) ? "3" : "-",
555 dn->n.nud_state,
556 atomic_read(&dn->n.refcnt),
557 dn->blksize,
558 (dn->n.dev) ? dn->n.dev->name : "?");
559 read_unlock(&n->lock);
560}
561
562static int dn_neigh_seq_show(struct seq_file *seq, void *v)
563{
564 if (v == SEQ_START_TOKEN) {
565 seq_puts(seq, "Addr Flags State Use Blksize Dev\n");
566 } else {
567 dn_neigh_format_entry(seq, v);
568 }
569
570 return 0;
571}
572
573static void *dn_neigh_seq_start(struct seq_file *seq, loff_t *pos)
574{
575 return neigh_seq_start(seq, pos, &dn_neigh_table,
576 NEIGH_SEQ_NEIGH_ONLY);
577}
578
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700579static const struct seq_operations dn_neigh_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 .start = dn_neigh_seq_start,
581 .next = neigh_seq_next,
582 .stop = neigh_seq_stop,
583 .show = dn_neigh_seq_show,
584};
585
586static int dn_neigh_seq_open(struct inode *inode, struct file *file)
587{
Eric W. Biederman426b5302008-01-24 00:13:18 -0800588 return seq_open_net(inode, file, &dn_neigh_seq_ops,
589 sizeof(struct neigh_seq_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590}
591
Arjan van de Ven9a321442007-02-12 00:55:35 -0800592static const struct file_operations dn_neigh_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 .owner = THIS_MODULE,
594 .open = dn_neigh_seq_open,
595 .read = seq_read,
596 .llseek = seq_lseek,
Eric W. Biederman426b5302008-01-24 00:13:18 -0800597 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598};
599
600#endif
601
602void __init dn_neigh_init(void)
603{
604 neigh_table_init(&dn_neigh_table);
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200605 proc_net_fops_create(&init_net, "decnet_neigh", S_IRUGO, &dn_neigh_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606}
607
608void __exit dn_neigh_cleanup(void)
609{
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200610 proc_net_remove(&init_net, "decnet_neigh");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 neigh_table_clear(&dn_neigh_table);
612}