#!/bin/sh # Copyright (C) 2006-2010 OpenWrt.org # Copyright (C) 2010 Vertical Communications fs_wait_for_key () { local timeout=$3 local timer local do_keypress local keypress_true="$(mktemp)" local keypress_wait="$(mktemp)" local keypress_sec="$(mktemp)" if [ -z "$keypress_wait" ]; then keypress_wait=/tmp/.keypress_wait touch $keypress_wait fi if [ -z "$keypress_true" ]; then keypress_true=/tmp/.keypress_true touch $keypress_true fi if [ -z "$keypress_sec" ]; then keypress_sec=/tmp/.keypress_sec touch $keypress_sec fi trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" INT trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" USR1 [ -n "$timeout" ] || timeout=1 [ $timeout -ge 1 ] || timeout=1 timer=$timeout lock $keypress_wait { while [ $timer -gt 0 ]; do echo "$timer" >$keypress_sec timer=$(($timer - 1)) sleep 1 done lock -u $keypress_wait rm -f $keypress_wait } & [ "$pi_preinit_no_failsafe" != "y" ] && echo "Press the [$1] key and hit [enter] $2" echo "Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level" # if we're on the console we wait for input { while [ -r $keypress_wait ]; do timer="$(cat $keypress_sec)" [ -n "$timer" ] || timer=1 timer="${timer%%\ *}" [ $timer -ge 1 ] || timer=1 do_keypress="" { read -t "$timer" do_keypress case "$do_keypress" in $1) echo "true" >$keypress_true ;; 1 | 2 | 3 | 4) echo "$do_keypress" >/tmp/debug_level ;; *) continue; ;; esac lock -u $keypress_wait rm -f $keypress_wait } done } lock -w $keypress_wait keypressed=1 [ "$(cat $keypress_true)" = "true" ] && keypressed=0 rm -f $keypress_true rm -f $keypress_wait rm -f $keypress_sec return $keypressed } failsafe_wait() { FAILSAFE= [ "$pi_preinit_no_failsafe" == "y" ] && { fs_wait_for_key "" "" $fs_failsafe_wait_timeout return } grep -q 'failsafe=' /proc/cmdline && FAILSAFE=true && export FAILSAFE if [ "$FAILSAFE" != "true" ]; then pi_failsafe_net_message=true preinit_net_echo "Please press button now to enter failsafe" pi_failsafe_net_message=false fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true [ -f "/tmp/failsafe_button" ] && FAILSAFE=true && echo "- failsafe button "`cat /tmp/failsafe_button`" was pressed -" [ "$FAILSAFE" = "true" ] && export FAILSAFE && touch /tmp/failsafe fi } boot_hook_add preinit_main failsafe_wait /option>
path: root/include/net/neighbour.h
blob: 4014b623880cf529e3bb5b184a5b31dee650a8b5 (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390

#ifndef _NET_NEIGHBOUR_H
#define _NET_NEIGHBOUR_H

#include <linux/neighbour.h>

/*
 *	Generic neighbour manipulation
 *
 *	Authors:
 *	Pedro Roque		<roque@di.fc.ul.pt>
 *	Alexey Kuznetsov	<kuznet@ms2.inr.ac.ru>
 *
 * 	Changes:
 *
 *	Harald Welte:		<laforge@gnumonks.org>
 *		- Add neighbour cache statistics like rtstat
 */

#include <asm/atomic.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>

#include <linux/err.h>
#include <linux/sysctl.h>
#include <linux/workqueue.h>
#include <net/rtnetlink.h>

/*
 * NUD stands for "neighbor unreachability detection"
 */

#define NUD_IN_TIMER	(NUD_INCOMPLETE|NUD_REACHABLE|NUD_DELAY|NUD_PROBE)
#define NUD_VALID	(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
#define NUD_CONNECTED	(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE)

struct neighbour;

struct neigh_parms {
#ifdef CONFIG_NET_NS
	struct net *net;
#endif
	struct net_device *dev;
	struct neigh_parms *next;
	int	(*neigh_setup)(struct neighbour *);
	void	(*neigh_cleanup)(struct neighbour *);
	struct neigh_table *tbl;

	void	*sysctl_table;

	int dead;
	atomic_t refcnt;
	struct rcu_head rcu_head;

	int	base_reachable_time;
	int	retrans_time;
	int	gc_staletime;
	int	reachable_time;
	int	delay_probe_time;

	int	queue_len;
	int	ucast_probes;
	int	app_probes;
	int	mcast_probes;
	int	anycast_delay;
	int	proxy_delay;
	int	proxy_qlen;
	int	locktime;
};

struct neigh_statistics {
	unsigned long allocs;		/* number of allocated neighs */
	unsigned long destroys;		/* number of destroyed neighs */
	unsigned long hash_grows;	/* number of hash resizes */

	unsigned long res_failed;	/* number of failed resolutions */

	unsigned long lookups;		/* number of lookups */
	unsigned long hits;		/* number of hits (among lookups) */

	unsigned long rcv_probes_mcast;	/* number of received mcast ipv6 */
	unsigned long rcv_probes_ucast; /* number of received ucast ipv6 */

	unsigned long periodic_gc_runs;	/* number of periodic GC runs */
	unsigned long forced_gc_runs;	/* number of forced GC runs */

	unsigned long unres_discards;	/* number of unresolved drops */
};

#define NEIGH_CACHE_STAT_INC(tbl, field) this_cpu_inc((tbl)->stats->field)

struct neighbour {
	struct neighbour __rcu	*next;
	struct neigh_table	*tbl;
	struct neigh_parms	*parms;
	unsigned long		confirmed;
	unsigned long		updated;
	rwlock_t		lock;
	atomic_t		refcnt;
	struct sk_buff_head	arp_queue;
	struct timer_list	timer;
	unsigned long		used;
	atomic_t		probes;
	__u8			flags;
	__u8			nud_state;
	__u8			type;
	__u8			dead;
	seqlock_t		ha_lock;
	unsigned char		ha[ALIGN(MAX_ADDR_LEN, sizeof(unsigned long))];
	struct hh_cache		*hh;
	int			(*output)(struct sk_buff *skb);
	const struct neigh_ops	*ops;
	struct rcu_head		rcu;
	struct net_device	*dev;
	u8			primary_key[0];
};

struct neigh_ops {
	int			family;
	void			(*solicit)(struct neighbour *, struct sk_buff*);
	void			(*error_report)(struct neighbour *, struct sk_buff*);