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[NETFILTER]: nf_conntrack_expect: function naming unification
[linux-2.6] / net / ipv4 / netfilter / nf_conntrack_l3proto_ipv4_compat.c
1 /* ip_conntrack proc compat - based on ip_conntrack_standalone.c
2  *
3  * (C) 1999-2001 Paul `Rusty' Russell
4  * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10 #include <linux/types.h>
11 #include <linux/proc_fs.h>
12 #include <linux/seq_file.h>
13 #include <linux/percpu.h>
14
15 #include <linux/netfilter.h>
16 #include <net/netfilter/nf_conntrack_core.h>
17 #include <net/netfilter/nf_conntrack_l3proto.h>
18 #include <net/netfilter/nf_conntrack_l4proto.h>
19 #include <net/netfilter/nf_conntrack_expect.h>
20
21 #if 0
22 #define DEBUGP printk
23 #else
24 #define DEBUGP(format, args...)
25 #endif
26
27 #ifdef CONFIG_NF_CT_ACCT
28 static unsigned int
29 seq_print_counters(struct seq_file *s,
30                    const struct ip_conntrack_counter *counter)
31 {
32         return seq_printf(s, "packets=%llu bytes=%llu ",
33                           (unsigned long long)counter->packets,
34                           (unsigned long long)counter->bytes);
35 }
36 #else
37 #define seq_print_counters(x, y)        0
38 #endif
39
40 struct ct_iter_state {
41         unsigned int bucket;
42 };
43
44 static struct hlist_node *ct_get_first(struct seq_file *seq)
45 {
46         struct ct_iter_state *st = seq->private;
47
48         for (st->bucket = 0;
49              st->bucket < nf_conntrack_htable_size;
50              st->bucket++) {
51                 if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
52                         return nf_conntrack_hash[st->bucket].first;
53         }
54         return NULL;
55 }
56
57 static struct hlist_node *ct_get_next(struct seq_file *seq,
58                                       struct hlist_node *head)
59 {
60         struct ct_iter_state *st = seq->private;
61
62         head = head->next;
63         while (head == NULL) {
64                 if (++st->bucket >= nf_conntrack_htable_size)
65                         return NULL;
66                 head = nf_conntrack_hash[st->bucket].first;
67         }
68         return head;
69 }
70
71 static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
72 {
73         struct hlist_node *head = ct_get_first(seq);
74
75         if (head)
76                 while (pos && (head = ct_get_next(seq, head)))
77                         pos--;
78         return pos ? NULL : head;
79 }
80
81 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
82 {
83         read_lock_bh(&nf_conntrack_lock);
84         return ct_get_idx(seq, *pos);
85 }
86
87 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
88 {
89         (*pos)++;
90         return ct_get_next(s, v);
91 }
92
93 static void ct_seq_stop(struct seq_file *s, void *v)
94 {
95         read_unlock_bh(&nf_conntrack_lock);
96 }
97
98 static int ct_seq_show(struct seq_file *s, void *v)
99 {
100         const struct nf_conntrack_tuple_hash *hash = v;
101         const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
102         struct nf_conntrack_l3proto *l3proto;
103         struct nf_conntrack_l4proto *l4proto;
104
105         NF_CT_ASSERT(ct);
106
107         /* we only want to print DIR_ORIGINAL */
108         if (NF_CT_DIRECTION(hash))
109                 return 0;
110         if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num != AF_INET)
111                 return 0;
112
113         l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
114                                        .tuple.src.l3num);
115         NF_CT_ASSERT(l3proto);
116         l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
117                                        .tuple.src.l3num,
118                                        ct->tuplehash[IP_CT_DIR_ORIGINAL]
119                                        .tuple.dst.protonum);
120         NF_CT_ASSERT(l4proto);
121
122         if (seq_printf(s, "%-8s %u %ld ",
123                       l4proto->name,
124                       ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
125                       timer_pending(&ct->timeout)
126                       ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
127                 return -ENOSPC;
128
129         if (l3proto->print_conntrack(s, ct))
130                 return -ENOSPC;
131
132         if (l4proto->print_conntrack(s, ct))
133                 return -ENOSPC;
134
135         if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
136                         l3proto, l4proto))
137                 return -ENOSPC;
138
139         if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL]))
140                 return -ENOSPC;
141
142         if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
143                 if (seq_printf(s, "[UNREPLIED] "))
144                         return -ENOSPC;
145
146         if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
147                         l3proto, l4proto))
148                 return -ENOSPC;
149
150         if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY]))
151                 return -ENOSPC;
152
153         if (test_bit(IPS_ASSURED_BIT, &ct->status))
154                 if (seq_printf(s, "[ASSURED] "))
155                         return -ENOSPC;
156
157 #ifdef CONFIG_NF_CONNTRACK_MARK
158         if (seq_printf(s, "mark=%u ", ct->mark))
159                 return -ENOSPC;
160 #endif
161
162 #ifdef CONFIG_NF_CONNTRACK_SECMARK
163         if (seq_printf(s, "secmark=%u ", ct->secmark))
164                 return -ENOSPC;
165 #endif
166
167         if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
168                 return -ENOSPC;
169
170         return 0;
171 }
172
173 static struct seq_operations ct_seq_ops = {
174         .start = ct_seq_start,
175         .next  = ct_seq_next,
176         .stop  = ct_seq_stop,
177         .show  = ct_seq_show
178 };
179
180 static int ct_open(struct inode *inode, struct file *file)
181 {
182         struct seq_file *seq;
183         struct ct_iter_state *st;
184         int ret;
185
186         st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
187         if (st == NULL)
188                 return -ENOMEM;
189         ret = seq_open(file, &ct_seq_ops);
190         if (ret)
191                 goto out_free;
192         seq          = file->private_data;
193         seq->private = st;
194         memset(st, 0, sizeof(struct ct_iter_state));
195         return ret;
196 out_free:
197         kfree(st);
198         return ret;
199 }
200
201 static const struct file_operations ct_file_ops = {
202         .owner   = THIS_MODULE,
203         .open    = ct_open,
204         .read    = seq_read,
205         .llseek  = seq_lseek,
206         .release = seq_release_private,
207 };
208
209 /* expects */
210 static void *exp_seq_start(struct seq_file *s, loff_t *pos)
211 {
212         struct list_head *e = &nf_ct_expect_list;
213         loff_t i;
214
215         /* strange seq_file api calls stop even if we fail,
216          * thus we need to grab lock since stop unlocks */
217         read_lock_bh(&nf_conntrack_lock);
218
219         if (list_empty(e))
220                 return NULL;
221
222         for (i = 0; i <= *pos; i++) {
223                 e = e->next;
224                 if (e == &nf_ct_expect_list)
225                         return NULL;
226         }
227         return e;
228 }
229
230 static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos)
231 {
232         struct list_head *e = v;
233
234         ++*pos;
235         e = e->next;
236
237         if (e == &nf_ct_expect_list)
238                 return NULL;
239
240         return e;
241 }
242
243 static void exp_seq_stop(struct seq_file *s, void *v)
244 {
245         read_unlock_bh(&nf_conntrack_lock);
246 }
247
248 static int exp_seq_show(struct seq_file *s, void *v)
249 {
250         struct nf_conntrack_expect *exp = v;
251
252         if (exp->tuple.src.l3num != AF_INET)
253                 return 0;
254
255         if (exp->timeout.function)
256                 seq_printf(s, "%ld ", timer_pending(&exp->timeout)
257                            ? (long)(exp->timeout.expires - jiffies)/HZ : 0);
258         else
259                 seq_printf(s, "- ");
260
261         seq_printf(s, "proto=%u ", exp->tuple.dst.protonum);
262
263         print_tuple(s, &exp->tuple,
264                     __nf_ct_l3proto_find(exp->tuple.src.l3num),
265                     __nf_ct_l4proto_find(exp->tuple.src.l3num,
266                                          exp->tuple.dst.protonum));
267         return seq_putc(s, '\n');
268 }
269
270 static struct seq_operations exp_seq_ops = {
271         .start = exp_seq_start,
272         .next = exp_seq_next,
273         .stop = exp_seq_stop,
274         .show = exp_seq_show
275 };
276
277 static int exp_open(struct inode *inode, struct file *file)
278 {
279         return seq_open(file, &exp_seq_ops);
280 }
281
282 static const struct file_operations ip_exp_file_ops = {
283         .owner   = THIS_MODULE,
284         .open    = exp_open,
285         .read    = seq_read,
286         .llseek  = seq_lseek,
287         .release = seq_release
288 };
289
290 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
291 {
292         int cpu;
293
294         if (*pos == 0)
295                 return SEQ_START_TOKEN;
296
297         for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
298                 if (!cpu_possible(cpu))
299                         continue;
300                 *pos = cpu+1;
301                 return &per_cpu(nf_conntrack_stat, cpu);
302         }
303
304         return NULL;
305 }
306
307 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
308 {
309         int cpu;
310
311         for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
312                 if (!cpu_possible(cpu))
313                         continue;
314                 *pos = cpu+1;
315                 return &per_cpu(nf_conntrack_stat, cpu);
316         }
317
318         return NULL;
319 }
320
321 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
322 {
323 }
324
325 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
326 {
327         unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
328         struct ip_conntrack_stat *st = v;
329
330         if (v == SEQ_START_TOKEN) {
331                 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\n");
332                 return 0;
333         }
334
335         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
336                         "%08x %08x %08x %08x %08x  %08x %08x %08x \n",
337                    nr_conntracks,
338                    st->searched,
339                    st->found,
340                    st->new,
341                    st->invalid,
342                    st->ignore,
343                    st->delete,
344                    st->delete_list,
345                    st->insert,
346                    st->insert_failed,
347                    st->drop,
348                    st->early_drop,
349                    st->error,
350
351                    st->expect_new,
352                    st->expect_create,
353                    st->expect_delete
354                 );
355         return 0;
356 }
357
358 static struct seq_operations ct_cpu_seq_ops = {
359         .start  = ct_cpu_seq_start,
360         .next   = ct_cpu_seq_next,
361         .stop   = ct_cpu_seq_stop,
362         .show   = ct_cpu_seq_show,
363 };
364
365 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
366 {
367         return seq_open(file, &ct_cpu_seq_ops);
368 }
369
370 static const struct file_operations ct_cpu_seq_fops = {
371         .owner   = THIS_MODULE,
372         .open    = ct_cpu_seq_open,
373         .read    = seq_read,
374         .llseek  = seq_lseek,
375         .release = seq_release_private,
376 };
377
378 int __init nf_conntrack_ipv4_compat_init(void)
379 {
380         struct proc_dir_entry *proc, *proc_exp, *proc_stat;
381
382         proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
383         if (!proc)
384                 goto err1;
385
386         proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
387                                         &ip_exp_file_ops);
388         if (!proc_exp)
389                 goto err2;
390
391         proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat);
392         if (!proc_stat)
393                 goto err3;
394
395         proc_stat->proc_fops = &ct_cpu_seq_fops;
396         proc_stat->owner = THIS_MODULE;
397
398         return 0;
399
400 err3:
401         proc_net_remove("ip_conntrack_expect");
402 err2:
403         proc_net_remove("ip_conntrack");
404 err1:
405         return -ENOMEM;
406 }
407
408 void __exit nf_conntrack_ipv4_compat_fini(void)
409 {
410         remove_proc_entry("ip_conntrack", proc_net_stat);
411         proc_net_remove("ip_conntrack_expect");
412         proc_net_remove("ip_conntrack");
413 }