1 /* ip_conntrack proc compat - based on ip_conntrack_standalone.c
3 * (C) 1999-2001 Paul `Rusty' Russell
4 * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
5 * (C) 2006-2010 Patrick McHardy <kaber@trash.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/types.h>
12 #include <linux/proc_fs.h>
13 #include <linux/seq_file.h>
14 #include <linux/percpu.h>
15 #include <linux/security.h>
16 #include <net/net_namespace.h>
18 #include <linux/netfilter.h>
19 #include <net/netfilter/nf_conntrack_core.h>
20 #include <net/netfilter/nf_conntrack_l3proto.h>
21 #include <net/netfilter/nf_conntrack_l4proto.h>
22 #include <net/netfilter/nf_conntrack_expect.h>
23 #include <net/netfilter/nf_conntrack_acct.h>
24 #include <linux/rculist_nulls.h>
25 #include <linux/export.h>
27 struct ct_iter_state
{
28 struct seq_net_private p
;
32 static struct hlist_nulls_node
*ct_get_first(struct seq_file
*seq
)
34 struct ct_iter_state
*st
= seq
->private;
35 struct hlist_nulls_node
*n
;
38 st
->bucket
< nf_conntrack_htable_size
;
41 hlist_nulls_first_rcu(&nf_conntrack_hash
[st
->bucket
]));
48 static struct hlist_nulls_node
*ct_get_next(struct seq_file
*seq
,
49 struct hlist_nulls_node
*head
)
51 struct ct_iter_state
*st
= seq
->private;
53 head
= rcu_dereference(hlist_nulls_next_rcu(head
));
54 while (is_a_nulls(head
)) {
55 if (likely(get_nulls_value(head
) == st
->bucket
)) {
56 if (++st
->bucket
>= nf_conntrack_htable_size
)
59 head
= rcu_dereference(
60 hlist_nulls_first_rcu(&nf_conntrack_hash
[st
->bucket
]));
65 static struct hlist_nulls_node
*ct_get_idx(struct seq_file
*seq
, loff_t pos
)
67 struct hlist_nulls_node
*head
= ct_get_first(seq
);
70 while (pos
&& (head
= ct_get_next(seq
, head
)))
72 return pos
? NULL
: head
;
75 static void *ct_seq_start(struct seq_file
*seq
, loff_t
*pos
)
79 return ct_get_idx(seq
, *pos
);
82 static void *ct_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
85 return ct_get_next(s
, v
);
88 static void ct_seq_stop(struct seq_file
*s
, void *v
)
94 #ifdef CONFIG_NF_CONNTRACK_SECMARK
95 static void ct_show_secctx(struct seq_file
*s
, const struct nf_conn
*ct
)
101 ret
= security_secid_to_secctx(ct
->secmark
, &secctx
, &len
);
105 seq_printf(s
, "secctx=%s ", secctx
);
107 security_release_secctx(secctx
, len
);
110 static inline void ct_show_secctx(struct seq_file
*s
, const struct nf_conn
*ct
)
115 static bool ct_seq_should_skip(const struct nf_conn
*ct
,
116 const struct net
*net
,
117 const struct nf_conntrack_tuple_hash
*hash
)
119 /* we only want to print DIR_ORIGINAL */
120 if (NF_CT_DIRECTION(hash
))
123 if (nf_ct_l3num(ct
) != AF_INET
)
126 if (!net_eq(nf_ct_net(ct
), net
))
132 static int ct_seq_show(struct seq_file
*s
, void *v
)
134 struct nf_conntrack_tuple_hash
*hash
= v
;
135 struct nf_conn
*ct
= nf_ct_tuplehash_to_ctrack(hash
);
136 const struct nf_conntrack_l3proto
*l3proto
;
137 const struct nf_conntrack_l4proto
*l4proto
;
141 if (ct_seq_should_skip(ct
, seq_file_net(s
), hash
))
144 if (unlikely(!atomic_inc_not_zero(&ct
->ct_general
.use
)))
147 /* check if we raced w. object reuse */
148 if (!nf_ct_is_confirmed(ct
) ||
149 ct_seq_should_skip(ct
, seq_file_net(s
), hash
))
152 l3proto
= __nf_ct_l3proto_find(nf_ct_l3num(ct
));
153 NF_CT_ASSERT(l3proto
);
154 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
155 NF_CT_ASSERT(l4proto
);
158 seq_printf(s
, "%-8s %u %ld ",
159 l4proto
->name
, nf_ct_protonum(ct
),
160 timer_pending(&ct
->timeout
)
161 ? (long)(ct
->timeout
.expires
- jiffies
)/HZ
: 0);
163 if (l4proto
->print_conntrack
)
164 l4proto
->print_conntrack(s
, ct
);
166 if (seq_has_overflowed(s
))
169 print_tuple(s
, &ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
172 if (seq_has_overflowed(s
))
175 if (seq_print_acct(s
, ct
, IP_CT_DIR_ORIGINAL
))
178 if (!(test_bit(IPS_SEEN_REPLY_BIT
, &ct
->status
)))
179 seq_printf(s
, "[UNREPLIED] ");
181 print_tuple(s
, &ct
->tuplehash
[IP_CT_DIR_REPLY
].tuple
,
184 if (seq_has_overflowed(s
))
187 if (seq_print_acct(s
, ct
, IP_CT_DIR_REPLY
))
190 if (test_bit(IPS_ASSURED_BIT
, &ct
->status
))
191 seq_printf(s
, "[ASSURED] ");
193 #ifdef CONFIG_NF_CONNTRACK_MARK
194 seq_printf(s
, "mark=%u ", ct
->mark
);
197 ct_show_secctx(s
, ct
);
199 seq_printf(s
, "use=%u\n", atomic_read(&ct
->ct_general
.use
));
201 if (seq_has_overflowed(s
))
210 static const struct seq_operations ct_seq_ops
= {
211 .start
= ct_seq_start
,
217 static int ct_open(struct inode
*inode
, struct file
*file
)
219 return seq_open_net(inode
, file
, &ct_seq_ops
,
220 sizeof(struct ct_iter_state
));
223 static const struct file_operations ct_file_ops
= {
224 .owner
= THIS_MODULE
,
228 .release
= seq_release_net
,
232 struct ct_expect_iter_state
{
233 struct seq_net_private p
;
237 static struct hlist_node
*ct_expect_get_first(struct seq_file
*seq
)
239 struct ct_expect_iter_state
*st
= seq
->private;
240 struct hlist_node
*n
;
242 for (st
->bucket
= 0; st
->bucket
< nf_ct_expect_hsize
; st
->bucket
++) {
244 hlist_first_rcu(&nf_ct_expect_hash
[st
->bucket
]));
251 static struct hlist_node
*ct_expect_get_next(struct seq_file
*seq
,
252 struct hlist_node
*head
)
254 struct ct_expect_iter_state
*st
= seq
->private;
256 head
= rcu_dereference(hlist_next_rcu(head
));
257 while (head
== NULL
) {
258 if (++st
->bucket
>= nf_ct_expect_hsize
)
260 head
= rcu_dereference(
261 hlist_first_rcu(&nf_ct_expect_hash
[st
->bucket
]));
266 static struct hlist_node
*ct_expect_get_idx(struct seq_file
*seq
, loff_t pos
)
268 struct hlist_node
*head
= ct_expect_get_first(seq
);
271 while (pos
&& (head
= ct_expect_get_next(seq
, head
)))
273 return pos
? NULL
: head
;
276 static void *exp_seq_start(struct seq_file
*seq
, loff_t
*pos
)
280 return ct_expect_get_idx(seq
, *pos
);
283 static void *exp_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
286 return ct_expect_get_next(seq
, v
);
289 static void exp_seq_stop(struct seq_file
*seq
, void *v
)
295 static int exp_seq_show(struct seq_file
*s
, void *v
)
297 struct nf_conntrack_expect
*exp
;
298 const struct hlist_node
*n
= v
;
300 exp
= hlist_entry(n
, struct nf_conntrack_expect
, hnode
);
302 if (!net_eq(nf_ct_net(exp
->master
), seq_file_net(s
)))
305 if (exp
->tuple
.src
.l3num
!= AF_INET
)
308 if (exp
->timeout
.function
)
309 seq_printf(s
, "%ld ", timer_pending(&exp
->timeout
)
310 ? (long)(exp
->timeout
.expires
- jiffies
)/HZ
: 0);
314 seq_printf(s
, "proto=%u ", exp
->tuple
.dst
.protonum
);
316 print_tuple(s
, &exp
->tuple
,
317 __nf_ct_l3proto_find(exp
->tuple
.src
.l3num
),
318 __nf_ct_l4proto_find(exp
->tuple
.src
.l3num
,
319 exp
->tuple
.dst
.protonum
));
325 static const struct seq_operations exp_seq_ops
= {
326 .start
= exp_seq_start
,
327 .next
= exp_seq_next
,
328 .stop
= exp_seq_stop
,
332 static int exp_open(struct inode
*inode
, struct file
*file
)
334 return seq_open_net(inode
, file
, &exp_seq_ops
,
335 sizeof(struct ct_expect_iter_state
));
338 static const struct file_operations ip_exp_file_ops
= {
339 .owner
= THIS_MODULE
,
343 .release
= seq_release_net
,
346 static void *ct_cpu_seq_start(struct seq_file
*seq
, loff_t
*pos
)
348 struct net
*net
= seq_file_net(seq
);
352 return SEQ_START_TOKEN
;
354 for (cpu
= *pos
-1; cpu
< nr_cpu_ids
; ++cpu
) {
355 if (!cpu_possible(cpu
))
358 return per_cpu_ptr(net
->ct
.stat
, cpu
);
364 static void *ct_cpu_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
366 struct net
*net
= seq_file_net(seq
);
369 for (cpu
= *pos
; cpu
< nr_cpu_ids
; ++cpu
) {
370 if (!cpu_possible(cpu
))
373 return per_cpu_ptr(net
->ct
.stat
, cpu
);
379 static void ct_cpu_seq_stop(struct seq_file
*seq
, void *v
)
383 static int ct_cpu_seq_show(struct seq_file
*seq
, void *v
)
385 struct net
*net
= seq_file_net(seq
);
386 unsigned int nr_conntracks
= atomic_read(&net
->ct
.count
);
387 const struct ip_conntrack_stat
*st
= v
;
389 if (v
== SEQ_START_TOKEN
) {
390 seq_printf(seq
, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n");
394 seq_printf(seq
, "%08x %08x %08x %08x %08x %08x %08x %08x "
395 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
418 static const struct seq_operations ct_cpu_seq_ops
= {
419 .start
= ct_cpu_seq_start
,
420 .next
= ct_cpu_seq_next
,
421 .stop
= ct_cpu_seq_stop
,
422 .show
= ct_cpu_seq_show
,
425 static int ct_cpu_seq_open(struct inode
*inode
, struct file
*file
)
427 return seq_open_net(inode
, file
, &ct_cpu_seq_ops
,
428 sizeof(struct seq_net_private
));
431 static const struct file_operations ct_cpu_seq_fops
= {
432 .owner
= THIS_MODULE
,
433 .open
= ct_cpu_seq_open
,
436 .release
= seq_release_net
,
439 static int __net_init
ip_conntrack_net_init(struct net
*net
)
441 struct proc_dir_entry
*proc
, *proc_exp
, *proc_stat
;
443 proc
= proc_create("ip_conntrack", 0440, net
->proc_net
, &ct_file_ops
);
447 proc_exp
= proc_create("ip_conntrack_expect", 0440, net
->proc_net
,
452 proc_stat
= proc_create("ip_conntrack", S_IRUGO
,
453 net
->proc_net_stat
, &ct_cpu_seq_fops
);
459 remove_proc_entry("ip_conntrack_expect", net
->proc_net
);
461 remove_proc_entry("ip_conntrack", net
->proc_net
);
466 static void __net_exit
ip_conntrack_net_exit(struct net
*net
)
468 remove_proc_entry("ip_conntrack", net
->proc_net_stat
);
469 remove_proc_entry("ip_conntrack_expect", net
->proc_net
);
470 remove_proc_entry("ip_conntrack", net
->proc_net
);
473 static struct pernet_operations ip_conntrack_net_ops
= {
474 .init
= ip_conntrack_net_init
,
475 .exit
= ip_conntrack_net_exit
,
478 int __init
nf_conntrack_ipv4_compat_init(void)
480 return register_pernet_subsys(&ip_conntrack_net_ops
);
483 void __exit
nf_conntrack_ipv4_compat_fini(void)
485 unregister_pernet_subsys(&ip_conntrack_net_ops
);