Patrick McHardy | e4bd8bc | 2006-11-29 02:35:22 +0100 | [diff] [blame] | 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 list_head *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 (!list_empty(&nf_conntrack_hash[st->bucket])) |
| 52 | return nf_conntrack_hash[st->bucket].next; |
| 53 | } |
| 54 | return NULL; |
| 55 | } |
| 56 | |
| 57 | static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head) |
| 58 | { |
| 59 | struct ct_iter_state *st = seq->private; |
| 60 | |
| 61 | head = head->next; |
| 62 | while (head == &nf_conntrack_hash[st->bucket]) { |
| 63 | if (++st->bucket >= nf_conntrack_htable_size) |
| 64 | return NULL; |
| 65 | head = nf_conntrack_hash[st->bucket].next; |
| 66 | } |
| 67 | return head; |
| 68 | } |
| 69 | |
| 70 | static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos) |
| 71 | { |
| 72 | struct list_head *head = ct_get_first(seq); |
| 73 | |
| 74 | if (head) |
| 75 | while (pos && (head = ct_get_next(seq, head))) |
| 76 | pos--; |
| 77 | return pos ? NULL : head; |
| 78 | } |
| 79 | |
| 80 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) |
| 81 | { |
| 82 | read_lock_bh(&nf_conntrack_lock); |
| 83 | return ct_get_idx(seq, *pos); |
| 84 | } |
| 85 | |
| 86 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 87 | { |
| 88 | (*pos)++; |
| 89 | return ct_get_next(s, v); |
| 90 | } |
| 91 | |
| 92 | static void ct_seq_stop(struct seq_file *s, void *v) |
| 93 | { |
| 94 | read_unlock_bh(&nf_conntrack_lock); |
| 95 | } |
| 96 | |
| 97 | static int ct_seq_show(struct seq_file *s, void *v) |
| 98 | { |
| 99 | const struct nf_conntrack_tuple_hash *hash = v; |
| 100 | const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); |
| 101 | struct nf_conntrack_l3proto *l3proto; |
| 102 | struct nf_conntrack_l4proto *l4proto; |
| 103 | |
| 104 | NF_CT_ASSERT(ct); |
| 105 | |
| 106 | /* we only want to print DIR_ORIGINAL */ |
| 107 | if (NF_CT_DIRECTION(hash)) |
| 108 | return 0; |
| 109 | if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num != AF_INET) |
| 110 | return 0; |
| 111 | |
| 112 | l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL] |
| 113 | .tuple.src.l3num); |
| 114 | NF_CT_ASSERT(l3proto); |
| 115 | l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL] |
| 116 | .tuple.src.l3num, |
| 117 | ct->tuplehash[IP_CT_DIR_ORIGINAL] |
| 118 | .tuple.dst.protonum); |
| 119 | NF_CT_ASSERT(l4proto); |
| 120 | |
| 121 | if (seq_printf(s, "%-8s %u %ld ", |
| 122 | l4proto->name, |
| 123 | ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum, |
| 124 | timer_pending(&ct->timeout) |
| 125 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) |
| 126 | return -ENOSPC; |
| 127 | |
| 128 | if (l3proto->print_conntrack(s, ct)) |
| 129 | return -ENOSPC; |
| 130 | |
| 131 | if (l4proto->print_conntrack(s, ct)) |
| 132 | return -ENOSPC; |
| 133 | |
| 134 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 135 | l3proto, l4proto)) |
| 136 | return -ENOSPC; |
| 137 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame^] | 138 | if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL])) |
Patrick McHardy | e4bd8bc | 2006-11-29 02:35:22 +0100 | [diff] [blame] | 139 | return -ENOSPC; |
| 140 | |
| 141 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
| 142 | if (seq_printf(s, "[UNREPLIED] ")) |
| 143 | return -ENOSPC; |
| 144 | |
| 145 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
| 146 | l3proto, l4proto)) |
| 147 | return -ENOSPC; |
| 148 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame^] | 149 | if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY])) |
Patrick McHardy | e4bd8bc | 2006-11-29 02:35:22 +0100 | [diff] [blame] | 150 | return -ENOSPC; |
| 151 | |
| 152 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
| 153 | if (seq_printf(s, "[ASSURED] ")) |
| 154 | return -ENOSPC; |
| 155 | |
| 156 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 157 | if (seq_printf(s, "mark=%u ", ct->mark)) |
| 158 | return -ENOSPC; |
| 159 | #endif |
| 160 | |
| 161 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 162 | if (seq_printf(s, "secmark=%u ", ct->secmark)) |
| 163 | return -ENOSPC; |
| 164 | #endif |
| 165 | |
| 166 | if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) |
| 167 | return -ENOSPC; |
| 168 | |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static struct seq_operations ct_seq_ops = { |
| 173 | .start = ct_seq_start, |
| 174 | .next = ct_seq_next, |
| 175 | .stop = ct_seq_stop, |
| 176 | .show = ct_seq_show |
| 177 | }; |
| 178 | |
| 179 | static int ct_open(struct inode *inode, struct file *file) |
| 180 | { |
| 181 | struct seq_file *seq; |
| 182 | struct ct_iter_state *st; |
| 183 | int ret; |
| 184 | |
| 185 | st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL); |
| 186 | if (st == NULL) |
| 187 | return -ENOMEM; |
| 188 | ret = seq_open(file, &ct_seq_ops); |
| 189 | if (ret) |
| 190 | goto out_free; |
| 191 | seq = file->private_data; |
| 192 | seq->private = st; |
| 193 | memset(st, 0, sizeof(struct ct_iter_state)); |
| 194 | return ret; |
| 195 | out_free: |
| 196 | kfree(st); |
| 197 | return ret; |
| 198 | } |
| 199 | |
| 200 | static struct file_operations ct_file_ops = { |
| 201 | .owner = THIS_MODULE, |
| 202 | .open = ct_open, |
| 203 | .read = seq_read, |
| 204 | .llseek = seq_lseek, |
| 205 | .release = seq_release_private, |
| 206 | }; |
| 207 | |
| 208 | /* expects */ |
| 209 | static void *exp_seq_start(struct seq_file *s, loff_t *pos) |
| 210 | { |
| 211 | struct list_head *e = &nf_conntrack_expect_list; |
| 212 | loff_t i; |
| 213 | |
| 214 | /* strange seq_file api calls stop even if we fail, |
| 215 | * thus we need to grab lock since stop unlocks */ |
| 216 | read_lock_bh(&nf_conntrack_lock); |
| 217 | |
| 218 | if (list_empty(e)) |
| 219 | return NULL; |
| 220 | |
| 221 | for (i = 0; i <= *pos; i++) { |
| 222 | e = e->next; |
| 223 | if (e == &nf_conntrack_expect_list) |
| 224 | return NULL; |
| 225 | } |
| 226 | return e; |
| 227 | } |
| 228 | |
| 229 | static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 230 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame^] | 231 | struct list_head *e = v; |
Patrick McHardy | e4bd8bc | 2006-11-29 02:35:22 +0100 | [diff] [blame] | 232 | |
| 233 | ++*pos; |
| 234 | e = e->next; |
| 235 | |
| 236 | if (e == &nf_conntrack_expect_list) |
| 237 | return NULL; |
| 238 | |
| 239 | return e; |
| 240 | } |
| 241 | |
| 242 | static void exp_seq_stop(struct seq_file *s, void *v) |
| 243 | { |
| 244 | read_unlock_bh(&nf_conntrack_lock); |
| 245 | } |
| 246 | |
| 247 | static int exp_seq_show(struct seq_file *s, void *v) |
| 248 | { |
| 249 | struct nf_conntrack_expect *exp = v; |
| 250 | |
| 251 | if (exp->tuple.src.l3num != AF_INET) |
| 252 | return 0; |
| 253 | |
| 254 | if (exp->timeout.function) |
| 255 | seq_printf(s, "%ld ", timer_pending(&exp->timeout) |
| 256 | ? (long)(exp->timeout.expires - jiffies)/HZ : 0); |
| 257 | else |
| 258 | seq_printf(s, "- "); |
| 259 | |
| 260 | seq_printf(s, "proto=%u ", exp->tuple.dst.protonum); |
| 261 | |
| 262 | print_tuple(s, &exp->tuple, |
| 263 | __nf_ct_l3proto_find(exp->tuple.src.l3num), |
| 264 | __nf_ct_l4proto_find(exp->tuple.src.l3num, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame^] | 265 | exp->tuple.dst.protonum)); |
Patrick McHardy | e4bd8bc | 2006-11-29 02:35:22 +0100 | [diff] [blame] | 266 | return seq_putc(s, '\n'); |
| 267 | } |
| 268 | |
| 269 | static struct seq_operations exp_seq_ops = { |
| 270 | .start = exp_seq_start, |
| 271 | .next = exp_seq_next, |
| 272 | .stop = exp_seq_stop, |
| 273 | .show = exp_seq_show |
| 274 | }; |
| 275 | |
| 276 | static int exp_open(struct inode *inode, struct file *file) |
| 277 | { |
| 278 | return seq_open(file, &exp_seq_ops); |
| 279 | } |
| 280 | |
| 281 | static struct file_operations ip_exp_file_ops = { |
| 282 | .owner = THIS_MODULE, |
| 283 | .open = exp_open, |
| 284 | .read = seq_read, |
| 285 | .llseek = seq_lseek, |
| 286 | .release = seq_release |
| 287 | }; |
| 288 | |
| 289 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
| 290 | { |
| 291 | int cpu; |
| 292 | |
| 293 | if (*pos == 0) |
| 294 | return SEQ_START_TOKEN; |
| 295 | |
| 296 | for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) { |
| 297 | if (!cpu_possible(cpu)) |
| 298 | continue; |
| 299 | *pos = cpu+1; |
| 300 | return &per_cpu(nf_conntrack_stat, cpu); |
| 301 | } |
| 302 | |
| 303 | return NULL; |
| 304 | } |
| 305 | |
| 306 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 307 | { |
| 308 | int cpu; |
| 309 | |
| 310 | for (cpu = *pos; cpu < NR_CPUS; ++cpu) { |
| 311 | if (!cpu_possible(cpu)) |
| 312 | continue; |
| 313 | *pos = cpu+1; |
| 314 | return &per_cpu(nf_conntrack_stat, cpu); |
| 315 | } |
| 316 | |
| 317 | return NULL; |
| 318 | } |
| 319 | |
| 320 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) |
| 321 | { |
| 322 | } |
| 323 | |
| 324 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) |
| 325 | { |
| 326 | unsigned int nr_conntracks = atomic_read(&nf_conntrack_count); |
| 327 | struct ip_conntrack_stat *st = v; |
| 328 | |
| 329 | if (v == SEQ_START_TOKEN) { |
| 330 | 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"); |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " |
| 335 | "%08x %08x %08x %08x %08x %08x %08x %08x \n", |
| 336 | nr_conntracks, |
| 337 | st->searched, |
| 338 | st->found, |
| 339 | st->new, |
| 340 | st->invalid, |
| 341 | st->ignore, |
| 342 | st->delete, |
| 343 | st->delete_list, |
| 344 | st->insert, |
| 345 | st->insert_failed, |
| 346 | st->drop, |
| 347 | st->early_drop, |
| 348 | st->error, |
| 349 | |
| 350 | st->expect_new, |
| 351 | st->expect_create, |
| 352 | st->expect_delete |
| 353 | ); |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static struct seq_operations ct_cpu_seq_ops = { |
| 358 | .start = ct_cpu_seq_start, |
| 359 | .next = ct_cpu_seq_next, |
| 360 | .stop = ct_cpu_seq_stop, |
| 361 | .show = ct_cpu_seq_show, |
| 362 | }; |
| 363 | |
| 364 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) |
| 365 | { |
| 366 | return seq_open(file, &ct_cpu_seq_ops); |
| 367 | } |
| 368 | |
| 369 | static struct file_operations ct_cpu_seq_fops = { |
| 370 | .owner = THIS_MODULE, |
| 371 | .open = ct_cpu_seq_open, |
| 372 | .read = seq_read, |
| 373 | .llseek = seq_lseek, |
| 374 | .release = seq_release_private, |
| 375 | }; |
| 376 | |
| 377 | int __init nf_conntrack_ipv4_compat_init(void) |
| 378 | { |
| 379 | struct proc_dir_entry *proc, *proc_exp, *proc_stat; |
| 380 | |
| 381 | proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops); |
| 382 | if (!proc) |
| 383 | goto err1; |
| 384 | |
| 385 | proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440, |
| 386 | &ip_exp_file_ops); |
| 387 | if (!proc_exp) |
| 388 | goto err2; |
| 389 | |
| 390 | proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat); |
| 391 | if (!proc_stat) |
| 392 | goto err3; |
| 393 | |
| 394 | proc_stat->proc_fops = &ct_cpu_seq_fops; |
| 395 | proc_stat->owner = THIS_MODULE; |
| 396 | |
| 397 | return 0; |
| 398 | |
| 399 | err3: |
| 400 | proc_net_remove("ip_conntrack_expect"); |
| 401 | err2: |
| 402 | proc_net_remove("ip_conntrack"); |
| 403 | err1: |
| 404 | return -ENOMEM; |
| 405 | } |
| 406 | |
| 407 | void __exit nf_conntrack_ipv4_compat_fini(void) |
| 408 | { |
| 409 | remove_proc_entry("ip_conntrack", proc_net_stat); |
| 410 | proc_net_remove("ip_conntrack_expect"); |
| 411 | proc_net_remove("ip_conntrack"); |
| 412 | } |