net/netfilter/nf_conntrack_standalone.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3 #include <linux/netfilter.h>
   4 #include <linux/slab.h>
   5 #include <linux/module.h>
   6 #include <linux/skbuff.h>
   7 #include <linux/proc_fs.h>
   8 #include <linux/seq_file.h>
   9 #include <linux/percpu.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/security.h>
  12 #include <net/net_namespace.h>
  13 #ifdef CONFIG_SYSCTL
  14 #include <linux/sysctl.h>
  15 #endif
  16
  17 #include <net/netfilter/nf_conntrack.h>
  18 #include <net/netfilter/nf_conntrack_core.h>
  19 #include <net/netfilter/nf_conntrack_l4proto.h>
  20 #include <net/netfilter/nf_conntrack_expect.h>
  21 #include <net/netfilter/nf_conntrack_helper.h>
  22 #include <net/netfilter/nf_conntrack_acct.h>
  23 #include <net/netfilter/nf_conntrack_zones.h>
  24 #include <net/netfilter/nf_conntrack_timestamp.h>
  25 #include <linux/rculist_nulls.h>
  26
  27 static bool enable_hooks __read_mostly;
  28 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
  29 module_param(enable_hooks, bool, 0000);
  30
  31 unsigned int nf_conntrack_net_id __read_mostly;
  32
  33 #ifdef CONFIG_NF_CONNTRACK_PROCFS
  34 void
  35 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
  36             const struct nf_conntrack_l4proto *l4proto)
  37 {
  38         switch (tuple->src.l3num) {
  39         case NFPROTO_IPV4:
  40                 seq_printf(s, "src=%pI4 dst=%pI4 ",
  41                            &tuple->src.u3.ip, &tuple->dst.u3.ip);
  42                 break;
  43         case NFPROTO_IPV6:
  44                 seq_printf(s, "src=%pI6 dst=%pI6 ",
  45                            tuple->src.u3.ip6, tuple->dst.u3.ip6);
  46                 break;
  47         default:
  48                 break;
  49         }
  50
  51         switch (l4proto->l4proto) {
  52         case IPPROTO_ICMP:
  53                 seq_printf(s, "type=%u code=%u id=%u ",
  54                            tuple->dst.u.icmp.type,
  55                            tuple->dst.u.icmp.code,
  56                            ntohs(tuple->src.u.icmp.id));
  57                 break;
  58         case IPPROTO_TCP:
  59                 seq_printf(s, "sport=%hu dport=%hu ",
  60                            ntohs(tuple->src.u.tcp.port),
  61                            ntohs(tuple->dst.u.tcp.port));
  62                 break;
  63         case IPPROTO_UDPLITE:
  64         case IPPROTO_UDP:
  65                 seq_printf(s, "sport=%hu dport=%hu ",
  66                            ntohs(tuple->src.u.udp.port),
  67                            ntohs(tuple->dst.u.udp.port));
  68
  69                 break;
  70         case IPPROTO_DCCP:
  71                 seq_printf(s, "sport=%hu dport=%hu ",
  72                            ntohs(tuple->src.u.dccp.port),
  73                            ntohs(tuple->dst.u.dccp.port));
  74                 break;
  75         case IPPROTO_SCTP:
  76                 seq_printf(s, "sport=%hu dport=%hu ",
  77                            ntohs(tuple->src.u.sctp.port),
  78                            ntohs(tuple->dst.u.sctp.port));
  79                 break;
  80         case IPPROTO_ICMPV6:
  81                 seq_printf(s, "type=%u code=%u id=%u ",
  82                            tuple->dst.u.icmp.type,
  83                            tuple->dst.u.icmp.code,
  84                            ntohs(tuple->src.u.icmp.id));
  85                 break;
  86         case IPPROTO_GRE:
  87                 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
  88                            ntohs(tuple->src.u.gre.key),
  89                            ntohs(tuple->dst.u.gre.key));
  90                 break;
  91         default:
  92                 break;
  93         }
  94 }
  95 EXPORT_SYMBOL_GPL(print_tuple);
  96
  97 struct ct_iter_state {
  98         struct seq_net_private p;
  99         struct hlist_nulls_head *hash;
 100         unsigned int htable_size;
 101         unsigned int bucket;
 102         u_int64_t time_now;
 103 };
 104
 105 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
 106 {
 107         struct ct_iter_state *st = seq->private;
 108         struct hlist_nulls_node *n;
 109
 110         for (st->bucket = 0;
 111              st->bucket < st->htable_size;
 112              st->bucket++) {
 113                 n = rcu_dereference(
 114                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 115                 if (!is_a_nulls(n))
 116                         return n;
 117         }
 118         return NULL;
 119 }
 120
 121 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
 122                                       struct hlist_nulls_node *head)
 123 {
 124         struct ct_iter_state *st = seq->private;
 125
 126         head = rcu_dereference(hlist_nulls_next_rcu(head));
 127         while (is_a_nulls(head)) {
 128                 if (likely(get_nulls_value(head) == st->bucket)) {
 129                         if (++st->bucket >= st->htable_size)
 130                                 return NULL;
 131                 }
 132                 head = rcu_dereference(
 133                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 134         }
 135         return head;
 136 }
 137
 138 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
 139 {
 140         struct hlist_nulls_node *head = ct_get_first(seq);
 141
 142         if (head)
 143                 while (pos && (head = ct_get_next(seq, head)))
 144                         pos--;
 145         return pos ? NULL : head;
 146 }
 147
 148 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
 149         __acquires(RCU)
 150 {
 151         struct ct_iter_state *st = seq->private;
 152
 153         st->time_now = ktime_get_real_ns();
 154         rcu_read_lock();
 155
 156         nf_conntrack_get_ht(&st->hash, &st->htable_size);
 157         return ct_get_idx(seq, *pos);
 158 }
 159
 160 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
 161 {
 162         (*pos)++;
 163         return ct_get_next(s, v);
 164 }
 165
 166 static void ct_seq_stop(struct seq_file *s, void *v)
 167         __releases(RCU)
 168 {
 169         rcu_read_unlock();
 170 }
 171
 172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 173 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 174 {
 175         int ret;
 176         u32 len;
 177         char *secctx;
 178
 179         ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
 180         if (ret)
 181                 return;
 182
 183         seq_printf(s, "secctx=%s ", secctx);
 184
 185         security_release_secctx(secctx, len);
 186 }
 187 #else
 188 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 189 {
 190 }
 191 #endif
 192
 193 #ifdef CONFIG_NF_CONNTRACK_ZONES
 194 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 195                          int dir)
 196 {
 197         const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
 198
 199         if (zone->dir != dir)
 200                 return;
 201         switch (zone->dir) {
 202         case NF_CT_DEFAULT_ZONE_DIR:
 203                 seq_printf(s, "zone=%u ", zone->id);
 204                 break;
 205         case NF_CT_ZONE_DIR_ORIG:
 206                 seq_printf(s, "zone-orig=%u ", zone->id);
 207                 break;
 208         case NF_CT_ZONE_DIR_REPL:
 209                 seq_printf(s, "zone-reply=%u ", zone->id);
 210                 break;
 211         default:
 212                 break;
 213         }
 214 }
 215 #else
 216 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 217                                 int dir)
 218 {
 219 }
 220 #endif
 221
 222 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 223 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 224 {
 225         struct ct_iter_state *st = s->private;
 226         struct nf_conn_tstamp *tstamp;
 227         s64 delta_time;
 228
 229         tstamp = nf_conn_tstamp_find(ct);
 230         if (tstamp) {
 231                 delta_time = st->time_now - tstamp->start;
 232                 if (delta_time > 0)
 233                         delta_time = div_s64(delta_time, NSEC_PER_SEC);
 234                 else
 235                         delta_time = 0;
 236
 237                 seq_printf(s, "delta-time=%llu ",
 238                            (unsigned long long)delta_time);
 239         }
 240         return;
 241 }
 242 #else
 243 static inline void
 244 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 245 {
 246 }
 247 #endif
 248
 249 static const char* l3proto_name(u16 proto)
 250 {
 251         switch (proto) {
 252         case AF_INET: return "ipv4";
 253         case AF_INET6: return "ipv6";
 254         }
 255
 256         return "unknown";
 257 }
 258
 259 static const char* l4proto_name(u16 proto)
 260 {
 261         switch (proto) {
 262         case IPPROTO_ICMP: return "icmp";
 263         case IPPROTO_TCP: return "tcp";
 264         case IPPROTO_UDP: return "udp";
 265         case IPPROTO_DCCP: return "dccp";
 266         case IPPROTO_GRE: return "gre";
 267         case IPPROTO_SCTP: return "sctp";
 268         case IPPROTO_UDPLITE: return "udplite";
 269         }
 270
 271         return "unknown";
 272 }
 273
 274 static unsigned int
 275 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 276 {
 277         struct nf_conn_acct *acct;
 278         struct nf_conn_counter *counter;
 279
 280         acct = nf_conn_acct_find(ct);
 281         if (!acct)
 282                 return 0;
 283
 284         counter = acct->counter;
 285         seq_printf(s, "packets=%llu bytes=%llu ",
 286                    (unsigned long long)atomic64_read(&counter[dir].packets),
 287                    (unsigned long long)atomic64_read(&counter[dir].bytes));
 288
 289         return 0;
 290 }
 291
 292 /* return 0 on success, 1 in case of error */
 293 static int ct_seq_show(struct seq_file *s, void *v)
 294 {
 295         struct nf_conntrack_tuple_hash *hash = v;
 296         struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
 297         const struct nf_conntrack_l4proto *l4proto;
 298         struct net *net = seq_file_net(s);
 299         int ret = 0;
 300
 301         WARN_ON(!ct);
 302         if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
 303                 return 0;
 304
 305         if (nf_ct_should_gc(ct)) {
 306                 nf_ct_kill(ct);
 307                 goto release;
 308         }
 309
 310         /* we only want to print DIR_ORIGINAL */
 311         if (NF_CT_DIRECTION(hash))
 312                 goto release;
 313
 314         if (!net_eq(nf_ct_net(ct), net))
 315                 goto release;
 316
 317         l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 318
 319         ret = -ENOSPC;
 320         seq_printf(s, "%-8s %u %-8s %u ",
 321                    l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
 322                    l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
 323
 324         if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
 325                 seq_printf(s, "%ld ", nf_ct_expires(ct)  / HZ);
 326
 327         if (l4proto->print_conntrack)
 328                 l4proto->print_conntrack(s, ct);
 329
 330         print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
 331                     l4proto);
 332
 333         ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
 334
 335         if (seq_has_overflowed(s))
 336                 goto release;
 337
 338         if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
 339                 goto release;
 340
 341         if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
 342                 seq_puts(s, "[UNREPLIED] ");
 343
 344         print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
 345
 346         ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
 347
 348         if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
 349                 goto release;
 350
 351         if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
 352                 seq_puts(s, "[HW_OFFLOAD] ");
 353         else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
 354                 seq_puts(s, "[OFFLOAD] ");
 355         else if (test_bit(IPS_ASSURED_BIT, &ct->status))
 356                 seq_puts(s, "[ASSURED] ");
 357
 358         if (seq_has_overflowed(s))
 359                 goto release;
 360
 361 #if defined(CONFIG_NF_CONNTRACK_MARK)
 362         seq_printf(s, "mark=%u ", ct->mark);
 363 #endif
 364
 365         ct_show_secctx(s, ct);
 366         ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
 367         ct_show_delta_time(s, ct);
 368
 369         seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
 370
 371         if (seq_has_overflowed(s))
 372                 goto release;
 373
 374         ret = 0;
 375 release:
 376         nf_ct_put(ct);
 377         return ret;
 378 }
 379
 380 static const struct seq_operations ct_seq_ops = {
 381         .start = ct_seq_start,
 382         .next  = ct_seq_next,
 383         .stop  = ct_seq_stop,
 384         .show  = ct_seq_show
 385 };
 386
 387 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 388 {
 389         struct net *net = seq_file_net(seq);
 390         int cpu;
 391
 392         if (*pos == 0)
 393                 return SEQ_START_TOKEN;
 394
 395         for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
 396                 if (!cpu_possible(cpu))
 397                         continue;
 398                 *pos = cpu + 1;
 399                 return per_cpu_ptr(net->ct.stat, cpu);
 400         }
 401
 402         return NULL;
 403 }
 404
 405 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 406 {
 407         struct net *net = seq_file_net(seq);
 408         int cpu;
 409
 410         for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
 411                 if (!cpu_possible(cpu))
 412                         continue;
 413                 *pos = cpu + 1;
 414                 return per_cpu_ptr(net->ct.stat, cpu);
 415         }
 416         (*pos)++;
 417         return NULL;
 418 }
 419
 420 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 421 {
 422 }
 423
 424 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 425 {
 426         struct net *net = seq_file_net(seq);
 427         unsigned int nr_conntracks = atomic_read(&net->ct.count);
 428         const struct ip_conntrack_stat *st = v;
 429
 430         if (v == SEQ_START_TOKEN) {
 431                 seq_puts(seq, "entries  clashres found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete search_restart\n");
 432                 return 0;
 433         }
 434
 435         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
 436                         "%08x %08x %08x %08x %08x  %08x %08x %08x %08x\n",
 437                    nr_conntracks,
 438                    st->clash_resolve,
 439                    st->found,
 440                    0,
 441                    st->invalid,
 442                    0,
 443                    0,
 444                    0,
 445                    st->insert,
 446                    st->insert_failed,
 447                    st->drop,
 448                    st->early_drop,
 449                    st->error,
 450
 451                    st->expect_new,
 452                    st->expect_create,
 453                    st->expect_delete,
 454                    st->search_restart
 455                 );
 456         return 0;
 457 }
 458
 459 static const struct seq_operations ct_cpu_seq_ops = {
 460         .start  = ct_cpu_seq_start,
 461         .next   = ct_cpu_seq_next,
 462         .stop   = ct_cpu_seq_stop,
 463         .show   = ct_cpu_seq_show,
 464 };
 465
 466 static int nf_conntrack_standalone_init_proc(struct net *net)
 467 {
 468         struct proc_dir_entry *pde;
 469         kuid_t root_uid;
 470         kgid_t root_gid;
 471
 472         pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
 473                         sizeof(struct ct_iter_state));
 474         if (!pde)
 475                 goto out_nf_conntrack;
 476
 477         root_uid = make_kuid(net->user_ns, 0);
 478         root_gid = make_kgid(net->user_ns, 0);
 479         if (uid_valid(root_uid) && gid_valid(root_gid))
 480                 proc_set_user(pde, root_uid, root_gid);
 481
 482         pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
 483                         &ct_cpu_seq_ops, sizeof(struct seq_net_private));
 484         if (!pde)
 485                 goto out_stat_nf_conntrack;
 486         return 0;
 487
 488 out_stat_nf_conntrack:
 489         remove_proc_entry("nf_conntrack", net->proc_net);
 490 out_nf_conntrack:
 491         return -ENOMEM;
 492 }
 493
 494 static void nf_conntrack_standalone_fini_proc(struct net *net)
 495 {
 496         remove_proc_entry("nf_conntrack", net->proc_net_stat);
 497         remove_proc_entry("nf_conntrack", net->proc_net);
 498 }
 499 #else
 500 static int nf_conntrack_standalone_init_proc(struct net *net)
 501 {
 502         return 0;
 503 }
 504
 505 static void nf_conntrack_standalone_fini_proc(struct net *net)
 506 {
 507 }
 508 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
 509
 510 /* Sysctl support */
 511
 512 #ifdef CONFIG_SYSCTL
 513 /* Log invalid packets of a given protocol */
 514 static int log_invalid_proto_min __read_mostly;
 515 static int log_invalid_proto_max __read_mostly = 255;
 516
 517 /* size the user *wants to set */
 518 static unsigned int nf_conntrack_htable_size_user __read_mostly;
 519
 520 static int
 521 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
 522                          void *buffer, size_t *lenp, loff_t *ppos)
 523 {
 524         int ret;
 525
 526         ret = proc_dointvec(table, write, buffer, lenp, ppos);
 527         if (ret < 0 || !write)
 528                 return ret;
 529
 530         /* update ret, we might not be able to satisfy request */
 531         ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
 532
 533         /* update it to the actual value used by conntrack */
 534         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 535         return ret;
 536 }
 537
 538 static struct ctl_table_header *nf_ct_netfilter_header;
 539
 540 enum nf_ct_sysctl_index {
 541         NF_SYSCTL_CT_MAX,
 542         NF_SYSCTL_CT_COUNT,
 543         NF_SYSCTL_CT_BUCKETS,
 544         NF_SYSCTL_CT_CHECKSUM,
 545         NF_SYSCTL_CT_LOG_INVALID,
 546         NF_SYSCTL_CT_EXPECT_MAX,
 547         NF_SYSCTL_CT_ACCT,
 548         NF_SYSCTL_CT_HELPER,
 549 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 550         NF_SYSCTL_CT_EVENTS,
 551 #endif
 552 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 553         NF_SYSCTL_CT_TIMESTAMP,
 554 #endif
 555         NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
 556         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
 557         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
 558         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
 559         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
 560         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
 561         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
 562         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
 563         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
 564         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
 565         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
 566         NF_SYSCTL_CT_PROTO_TCP_LOOSE,
 567         NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
 568         NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
 569         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
 570         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
 571         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 572         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 573 #ifdef CONFIG_NF_CT_PROTO_SCTP
 574         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 575         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 576         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 577         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 578         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 579         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 580         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 581         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 582         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
 583 #endif
 584 #ifdef CONFIG_NF_CT_PROTO_DCCP
 585         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
 586         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
 587         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
 588         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
 589         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
 590         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
 591         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
 592         NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
 593 #endif
 594 #ifdef CONFIG_NF_CT_PROTO_GRE
 595         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
 596         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
 597 #endif
 598
 599         __NF_SYSCTL_CT_LAST_SYSCTL,
 600 };
 601
 602 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
 603
 604 static struct ctl_table nf_ct_sysctl_table[] = {
 605         [NF_SYSCTL_CT_MAX] = {
 606                 .procname       = "nf_conntrack_max",
 607                 .data           = &nf_conntrack_max,
 608                 .maxlen         = sizeof(int),
 609                 .mode           = 0644,
 610                 .proc_handler   = proc_dointvec,
 611         },
 612         [NF_SYSCTL_CT_COUNT] = {
 613                 .procname       = "nf_conntrack_count",
 614                 .data           = &init_net.ct.count,
 615                 .maxlen         = sizeof(int),
 616                 .mode           = 0444,
 617                 .proc_handler   = proc_dointvec,
 618         },
 619         [NF_SYSCTL_CT_BUCKETS] = {
 620                 .procname       = "nf_conntrack_buckets",
 621                 .data           = &nf_conntrack_htable_size_user,
 622                 .maxlen         = sizeof(unsigned int),
 623                 .mode           = 0644,
 624                 .proc_handler   = nf_conntrack_hash_sysctl,
 625         },
 626         [NF_SYSCTL_CT_CHECKSUM] = {
 627                 .procname       = "nf_conntrack_checksum",
 628                 .data           = &init_net.ct.sysctl_checksum,
 629                 .maxlen         = sizeof(int),
 630                 .mode           = 0644,
 631                 .proc_handler   = proc_dointvec_minmax,
 632                 .extra1         = SYSCTL_ZERO,
 633                 .extra2         = SYSCTL_ONE,
 634         },
 635         [NF_SYSCTL_CT_LOG_INVALID] = {
 636                 .procname       = "nf_conntrack_log_invalid",
 637                 .data           = &init_net.ct.sysctl_log_invalid,
 638                 .maxlen         = sizeof(unsigned int),
 639                 .mode           = 0644,
 640                 .proc_handler   = proc_dointvec_minmax,
 641                 .extra1         = &log_invalid_proto_min,
 642                 .extra2         = &log_invalid_proto_max,
 643         },
 644         [NF_SYSCTL_CT_EXPECT_MAX] = {
 645                 .procname       = "nf_conntrack_expect_max",
 646                 .data           = &nf_ct_expect_max,
 647                 .maxlen         = sizeof(int),
 648                 .mode           = 0644,
 649                 .proc_handler   = proc_dointvec,
 650         },
 651         [NF_SYSCTL_CT_ACCT] = {
 652                 .procname       = "nf_conntrack_acct",
 653                 .data           = &init_net.ct.sysctl_acct,
 654                 .maxlen         = sizeof(int),
 655                 .mode           = 0644,
 656                 .proc_handler   = proc_dointvec_minmax,
 657                 .extra1         = SYSCTL_ZERO,
 658                 .extra2         = SYSCTL_ONE,
 659         },
 660         [NF_SYSCTL_CT_HELPER] = {
 661                 .procname       = "nf_conntrack_helper",
 662                 .data           = &init_net.ct.sysctl_auto_assign_helper,
 663                 .maxlen         = sizeof(int),
 664                 .mode           = 0644,
 665                 .proc_handler   = proc_dointvec_minmax,
 666                 .extra1         = SYSCTL_ZERO,
 667                 .extra2         = SYSCTL_ONE,
 668         },
 669 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 670         [NF_SYSCTL_CT_EVENTS] = {
 671                 .procname       = "nf_conntrack_events",
 672                 .data           = &init_net.ct.sysctl_events,
 673                 .maxlen         = sizeof(int),
 674                 .mode           = 0644,
 675                 .proc_handler   = proc_dointvec_minmax,
 676                 .extra1         = SYSCTL_ZERO,
 677                 .extra2         = SYSCTL_ONE,
 678         },
 679 #endif
 680 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 681         [NF_SYSCTL_CT_TIMESTAMP] = {
 682                 .procname       = "nf_conntrack_timestamp",
 683                 .data           = &init_net.ct.sysctl_tstamp,
 684                 .maxlen         = sizeof(int),
 685                 .mode           = 0644,
 686                 .proc_handler   = proc_dointvec_minmax,
 687                 .extra1         = SYSCTL_ZERO,
 688                 .extra2         = SYSCTL_ONE,
 689         },
 690 #endif
 691         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 692                 .procname       = "nf_conntrack_generic_timeout",
 693                 .maxlen         = sizeof(unsigned int),
 694                 .mode           = 0644,
 695                 .proc_handler   = proc_dointvec_jiffies,
 696         },
 697         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 698                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 699                 .maxlen         = sizeof(unsigned int),
 700                 .mode           = 0644,
 701                 .proc_handler   = proc_dointvec_jiffies,
 702         },
 703         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 704                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 705                 .maxlen         = sizeof(unsigned int),
 706                 .mode           = 0644,
 707                 .proc_handler   = proc_dointvec_jiffies,
 708         },
 709         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 710                 .procname       = "nf_conntrack_tcp_timeout_established",
 711                 .maxlen         = sizeof(unsigned int),
 712                 .mode           = 0644,
 713                 .proc_handler   = proc_dointvec_jiffies,
 714         },
 715         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 716                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 717                 .maxlen         = sizeof(unsigned int),
 718                 .mode           = 0644,
 719                 .proc_handler   = proc_dointvec_jiffies,
 720         },
 721         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 722                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 723                 .maxlen         = sizeof(unsigned int),
 724                 .mode           = 0644,
 725                 .proc_handler   = proc_dointvec_jiffies,
 726         },
 727         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 728                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 729                 .maxlen         = sizeof(unsigned int),
 730                 .mode           = 0644,
 731                 .proc_handler   = proc_dointvec_jiffies,
 732         },
 733         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 734                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 735                 .maxlen         = sizeof(unsigned int),
 736                 .mode           = 0644,
 737                 .proc_handler   = proc_dointvec_jiffies,
 738         },
 739         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 740                 .procname       = "nf_conntrack_tcp_timeout_close",
 741                 .maxlen         = sizeof(unsigned int),
 742                 .mode           = 0644,
 743                 .proc_handler   = proc_dointvec_jiffies,
 744         },
 745         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 746                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 747                 .maxlen         = sizeof(unsigned int),
 748                 .mode           = 0644,
 749                 .proc_handler   = proc_dointvec_jiffies,
 750         },
 751         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 752                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 753                 .maxlen         = sizeof(unsigned int),
 754                 .mode           = 0644,
 755                 .proc_handler   = proc_dointvec_jiffies,
 756         },
 757         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 758                 .procname       = "nf_conntrack_tcp_loose",
 759                 .maxlen         = sizeof(int),
 760                 .mode           = 0644,
 761                 .proc_handler   = proc_dointvec_minmax,
 762                 .extra1         = SYSCTL_ZERO,
 763                 .extra2         = SYSCTL_ONE,
 764         },
 765         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 766                 .procname       = "nf_conntrack_tcp_be_liberal",
 767                 .maxlen         = sizeof(int),
 768                 .mode           = 0644,
 769                 .proc_handler   = proc_dointvec_minmax,
 770                 .extra1         = SYSCTL_ZERO,
 771                 .extra2         = SYSCTL_ONE,
 772         },
 773         [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
 774                 .procname       = "nf_conntrack_tcp_max_retrans",
 775                 .maxlen         = sizeof(unsigned int),
 776                 .mode           = 0644,
 777                 .proc_handler   = proc_dointvec,
 778         },
 779         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 780                 .procname       = "nf_conntrack_udp_timeout",
 781                 .maxlen         = sizeof(unsigned int),
 782                 .mode           = 0644,
 783                 .proc_handler   = proc_dointvec_jiffies,
 784         },
 785         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 786                 .procname       = "nf_conntrack_udp_timeout_stream",
 787                 .maxlen         = sizeof(unsigned int),
 788                 .mode           = 0644,
 789                 .proc_handler   = proc_dointvec_jiffies,
 790         },
 791         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 792                 .procname       = "nf_conntrack_icmp_timeout",
 793                 .maxlen         = sizeof(unsigned int),
 794                 .mode           = 0644,
 795                 .proc_handler   = proc_dointvec_jiffies,
 796         },
 797         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 798                 .procname       = "nf_conntrack_icmpv6_timeout",
 799                 .maxlen         = sizeof(unsigned int),
 800                 .mode           = 0644,
 801                 .proc_handler   = proc_dointvec_jiffies,
 802         },
 803 #ifdef CONFIG_NF_CT_PROTO_SCTP
 804         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 805                 .procname       = "nf_conntrack_sctp_timeout_closed",
 806                 .maxlen         = sizeof(unsigned int),
 807                 .mode           = 0644,
 808                 .proc_handler   = proc_dointvec_jiffies,
 809         },
 810         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 811                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 812                 .maxlen         = sizeof(unsigned int),
 813                 .mode           = 0644,
 814                 .proc_handler   = proc_dointvec_jiffies,
 815         },
 816         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 817                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 818                 .maxlen         = sizeof(unsigned int),
 819                 .mode           = 0644,
 820                 .proc_handler   = proc_dointvec_jiffies,
 821         },
 822         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 823                 .procname       = "nf_conntrack_sctp_timeout_established",
 824                 .maxlen         = sizeof(unsigned int),
 825                 .mode           = 0644,
 826                 .proc_handler   = proc_dointvec_jiffies,
 827         },
 828         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 829                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 830                 .maxlen         = sizeof(unsigned int),
 831                 .mode           = 0644,
 832                 .proc_handler   = proc_dointvec_jiffies,
 833         },
 834         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 835                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 836                 .maxlen         = sizeof(unsigned int),
 837                 .mode           = 0644,
 838                 .proc_handler   = proc_dointvec_jiffies,
 839         },
 840         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 841                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 842                 .maxlen         = sizeof(unsigned int),
 843                 .mode           = 0644,
 844                 .proc_handler   = proc_dointvec_jiffies,
 845         },
 846         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 847                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 848                 .maxlen         = sizeof(unsigned int),
 849                 .mode           = 0644,
 850                 .proc_handler   = proc_dointvec_jiffies,
 851         },
 852         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
 853                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_acked",
 854                 .maxlen         = sizeof(unsigned int),
 855                 .mode           = 0644,
 856                 .proc_handler   = proc_dointvec_jiffies,
 857         },
 858 #endif
 859 #ifdef CONFIG_NF_CT_PROTO_DCCP
 860         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 861                 .procname       = "nf_conntrack_dccp_timeout_request",
 862                 .maxlen         = sizeof(unsigned int),
 863                 .mode           = 0644,
 864                 .proc_handler   = proc_dointvec_jiffies,
 865         },
 866         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 867                 .procname       = "nf_conntrack_dccp_timeout_respond",
 868                 .maxlen         = sizeof(unsigned int),
 869                 .mode           = 0644,
 870                 .proc_handler   = proc_dointvec_jiffies,
 871         },
 872         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 873                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 874                 .maxlen         = sizeof(unsigned int),
 875                 .mode           = 0644,
 876                 .proc_handler   = proc_dointvec_jiffies,
 877         },
 878         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 879                 .procname       = "nf_conntrack_dccp_timeout_open",
 880                 .maxlen         = sizeof(unsigned int),
 881                 .mode           = 0644,
 882                 .proc_handler   = proc_dointvec_jiffies,
 883         },
 884         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 885                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 886                 .maxlen         = sizeof(unsigned int),
 887                 .mode           = 0644,
 888                 .proc_handler   = proc_dointvec_jiffies,
 889         },
 890         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 891                 .procname       = "nf_conntrack_dccp_timeout_closing",
 892                 .maxlen         = sizeof(unsigned int),
 893                 .mode           = 0644,
 894                 .proc_handler   = proc_dointvec_jiffies,
 895         },
 896         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 897                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 898                 .maxlen         = sizeof(unsigned int),
 899                 .mode           = 0644,
 900                 .proc_handler   = proc_dointvec_jiffies,
 901         },
 902         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 903                 .procname       = "nf_conntrack_dccp_loose",
 904                 .maxlen         = sizeof(int),
 905                 .mode           = 0644,
 906                 .proc_handler   = proc_dointvec_minmax,
 907                 .extra1         = SYSCTL_ZERO,
 908                 .extra2         = SYSCTL_ONE,
 909         },
 910 #endif
 911 #ifdef CONFIG_NF_CT_PROTO_GRE
 912         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 913                 .procname       = "nf_conntrack_gre_timeout",
 914                 .maxlen         = sizeof(unsigned int),
 915                 .mode           = 0644,
 916                 .proc_handler   = proc_dointvec_jiffies,
 917         },
 918         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 919                 .procname       = "nf_conntrack_gre_timeout_stream",
 920                 .maxlen         = sizeof(unsigned int),
 921                 .mode           = 0644,
 922                 .proc_handler   = proc_dointvec_jiffies,
 923         },
 924 #endif
 925         {}
 926 };
 927
 928 static struct ctl_table nf_ct_netfilter_table[] = {
 929         {
 930                 .procname       = "nf_conntrack_max",
 931                 .data           = &nf_conntrack_max,
 932                 .maxlen         = sizeof(int),
 933                 .mode           = 0644,
 934                 .proc_handler   = proc_dointvec,
 935         },
 936         { }
 937 };
 938
 939 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 940                                                     struct ctl_table *table)
 941 {
 942         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 943
 944 #define XASSIGN(XNAME, tn) \
 945         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 946                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 947
 948         XASSIGN(SYN_SENT, tn);
 949         XASSIGN(SYN_RECV, tn);
 950         XASSIGN(ESTABLISHED, tn);
 951         XASSIGN(FIN_WAIT, tn);
 952         XASSIGN(CLOSE_WAIT, tn);
 953         XASSIGN(LAST_ACK, tn);
 954         XASSIGN(TIME_WAIT, tn);
 955         XASSIGN(CLOSE, tn);
 956         XASSIGN(RETRANS, tn);
 957         XASSIGN(UNACK, tn);
 958 #undef XASSIGN
 959 #define XASSIGN(XNAME, rval) \
 960         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
 961
 962         XASSIGN(LOOSE, &tn->tcp_loose);
 963         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
 964         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
 965 #undef XASSIGN
 966 }
 967
 968 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
 969                                                      struct ctl_table *table)
 970 {
 971 #ifdef CONFIG_NF_CT_PROTO_SCTP
 972         struct nf_sctp_net *sn = nf_sctp_pernet(net);
 973
 974 #define XASSIGN(XNAME, sn) \
 975         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
 976                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
 977
 978         XASSIGN(CLOSED, sn);
 979         XASSIGN(COOKIE_WAIT, sn);
 980         XASSIGN(COOKIE_ECHOED, sn);
 981         XASSIGN(ESTABLISHED, sn);
 982         XASSIGN(SHUTDOWN_SENT, sn);
 983         XASSIGN(SHUTDOWN_RECD, sn);
 984         XASSIGN(SHUTDOWN_ACK_SENT, sn);
 985         XASSIGN(HEARTBEAT_SENT, sn);
 986         XASSIGN(HEARTBEAT_ACKED, sn);
 987 #undef XASSIGN
 988 #endif
 989 }
 990
 991 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
 992                                                      struct ctl_table *table)
 993 {
 994 #ifdef CONFIG_NF_CT_PROTO_DCCP
 995         struct nf_dccp_net *dn = nf_dccp_pernet(net);
 996
 997 #define XASSIGN(XNAME, dn) \
 998         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
 999                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1000
1001         XASSIGN(REQUEST, dn);
1002         XASSIGN(RESPOND, dn);
1003         XASSIGN(PARTOPEN, dn);
1004         XASSIGN(OPEN, dn);
1005         XASSIGN(CLOSEREQ, dn);
1006         XASSIGN(CLOSING, dn);
1007         XASSIGN(TIMEWAIT, dn);
1008 #undef XASSIGN
1009
1010         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1011 #endif
1012 }
1013
1014 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1015                                                     struct ctl_table *table)
1016 {
1017 #ifdef CONFIG_NF_CT_PROTO_GRE
1018         struct nf_gre_net *gn = nf_gre_pernet(net);
1019
1020         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1021         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1022 #endif
1023 }
1024
1025 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1026 {
1027         struct nf_udp_net *un = nf_udp_pernet(net);
1028         struct ctl_table *table;
1029
1030         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1031
1032         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1033                         GFP_KERNEL);
1034         if (!table)
1035                 return -ENOMEM;
1036
1037         table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
1038         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1039         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1040         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1041         table[NF_SYSCTL_CT_HELPER].data = &net->ct.sysctl_auto_assign_helper;
1042 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1043         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1044 #endif
1045 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1046         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1047 #endif
1048         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1049         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1050         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1051         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1052         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1053
1054         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1055         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1056         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1057         nf_conntrack_standalone_init_gre_sysctl(net, table);
1058
1059         /* Don't allow unprivileged users to alter certain sysctls */
1060         if (net->user_ns != &init_user_ns) {
1061                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1062                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1063                 table[NF_SYSCTL_CT_HELPER].mode = 0444;
1064 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1065                 table[NF_SYSCTL_CT_EVENTS].mode = 0444;
1066 #endif
1067                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1068         } else if (!net_eq(&init_net, net)) {
1069                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1070         }
1071
1072         net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1073         if (!net->ct.sysctl_header)
1074                 goto out_unregister_netfilter;
1075
1076         return 0;
1077
1078 out_unregister_netfilter:
1079         kfree(table);
1080         return -ENOMEM;
1081 }
1082
1083 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1084 {
1085         struct ctl_table *table;
1086
1087         table = net->ct.sysctl_header->ctl_table_arg;
1088         unregister_net_sysctl_table(net->ct.sysctl_header);
1089         kfree(table);
1090 }
1091 #else
1092 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1093 {
1094         return 0;
1095 }
1096
1097 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1098 {
1099 }
1100 #endif /* CONFIG_SYSCTL */
1101
1102 static void nf_conntrack_fini_net(struct net *net)
1103 {
1104         if (enable_hooks)
1105                 nf_ct_netns_put(net, NFPROTO_INET);
1106
1107         nf_conntrack_standalone_fini_proc(net);
1108         nf_conntrack_standalone_fini_sysctl(net);
1109 }
1110
1111 static int nf_conntrack_pernet_init(struct net *net)
1112 {
1113         int ret;
1114
1115         net->ct.sysctl_checksum = 1;
1116
1117         ret = nf_conntrack_standalone_init_sysctl(net);
1118         if (ret < 0)
1119                 return ret;
1120
1121         ret = nf_conntrack_standalone_init_proc(net);
1122         if (ret < 0)
1123                 goto out_proc;
1124
1125         ret = nf_conntrack_init_net(net);
1126         if (ret < 0)
1127                 goto out_init_net;
1128
1129         if (enable_hooks) {
1130                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1131                 if (ret < 0)
1132                         goto out_hooks;
1133         }
1134
1135         return 0;
1136
1137 out_hooks:
1138         nf_conntrack_cleanup_net(net);
1139 out_init_net:
1140         nf_conntrack_standalone_fini_proc(net);
1141 out_proc:
1142         nf_conntrack_standalone_fini_sysctl(net);
1143         return ret;
1144 }
1145
1146 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1147 {
1148         struct net *net;
1149
1150         list_for_each_entry(net, net_exit_list, exit_list)
1151                 nf_conntrack_fini_net(net);
1152
1153         nf_conntrack_cleanup_net_list(net_exit_list);
1154 }
1155
1156 static struct pernet_operations nf_conntrack_net_ops = {
1157         .init           = nf_conntrack_pernet_init,
1158         .exit_batch     = nf_conntrack_pernet_exit,
1159         .id             = &nf_conntrack_net_id,
1160         .size = sizeof(struct nf_conntrack_net),
1161 };
1162
1163 static int __init nf_conntrack_standalone_init(void)
1164 {
1165         int ret = nf_conntrack_init_start();
1166         if (ret < 0)
1167                 goto out_start;
1168
1169         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1170
1171 #ifdef CONFIG_SYSCTL
1172         nf_ct_netfilter_header =
1173                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1174         if (!nf_ct_netfilter_header) {
1175                 pr_err("nf_conntrack: can't register to sysctl.\n");
1176                 ret = -ENOMEM;
1177                 goto out_sysctl;
1178         }
1179
1180         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1181 #endif
1182
1183         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1184         if (ret < 0)
1185                 goto out_pernet;
1186
1187         nf_conntrack_init_end();
1188         return 0;
1189
1190 out_pernet:
1191 #ifdef CONFIG_SYSCTL
1192         unregister_net_sysctl_table(nf_ct_netfilter_header);
1193 out_sysctl:
1194 #endif
1195         nf_conntrack_cleanup_end();
1196 out_start:
1197         return ret;
1198 }
1199
1200 static void __exit nf_conntrack_standalone_fini(void)
1201 {
1202         nf_conntrack_cleanup_start();
1203         unregister_pernet_subsys(&nf_conntrack_net_ops);
1204 #ifdef CONFIG_SYSCTL
1205         unregister_net_sysctl_table(nf_ct_netfilter_header);
1206 #endif
1207         nf_conntrack_cleanup_end();
1208 }
1209
1210 module_init(nf_conntrack_standalone_init);
1211 module_exit(nf_conntrack_standalone_fini);