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         /* module_param hashsize could have changed value */
 527         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 528
 529         ret = proc_dointvec(table, write, buffer, lenp, ppos);
 530         if (ret < 0 || !write)
 531                 return ret;
 532
 533         /* update ret, we might not be able to satisfy request */
 534         ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
 535
 536         /* update it to the actual value used by conntrack */
 537         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 538         return ret;
 539 }
 540
 541 static struct ctl_table_header *nf_ct_netfilter_header;
 542
 543 enum nf_ct_sysctl_index {
 544         NF_SYSCTL_CT_MAX,
 545         NF_SYSCTL_CT_COUNT,
 546         NF_SYSCTL_CT_BUCKETS,
 547         NF_SYSCTL_CT_CHECKSUM,
 548         NF_SYSCTL_CT_LOG_INVALID,
 549         NF_SYSCTL_CT_EXPECT_MAX,
 550         NF_SYSCTL_CT_ACCT,
 551         NF_SYSCTL_CT_HELPER,
 552 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 553         NF_SYSCTL_CT_EVENTS,
 554 #endif
 555 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 556         NF_SYSCTL_CT_TIMESTAMP,
 557 #endif
 558         NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
 559         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
 560         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
 561         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
 562         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
 563         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
 564         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
 565         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
 566         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
 567         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
 568         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
 569         NF_SYSCTL_CT_PROTO_TCP_LOOSE,
 570         NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
 571         NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
 572         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
 573         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
 574         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 575         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 576 #ifdef CONFIG_NF_CT_PROTO_SCTP
 577         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 578         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 579         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 580         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 581         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 582         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 583         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 584         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 585         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
 586 #endif
 587 #ifdef CONFIG_NF_CT_PROTO_DCCP
 588         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
 589         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
 590         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
 591         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
 592         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
 593         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
 594         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
 595         NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
 596 #endif
 597 #ifdef CONFIG_NF_CT_PROTO_GRE
 598         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
 599         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
 600 #endif
 601
 602         __NF_SYSCTL_CT_LAST_SYSCTL,
 603 };
 604
 605 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
 606
 607 static struct ctl_table nf_ct_sysctl_table[] = {
 608         [NF_SYSCTL_CT_MAX] = {
 609                 .procname       = "nf_conntrack_max",
 610                 .data           = &nf_conntrack_max,
 611                 .maxlen         = sizeof(int),
 612                 .mode           = 0644,
 613                 .proc_handler   = proc_dointvec,
 614         },
 615         [NF_SYSCTL_CT_COUNT] = {
 616                 .procname       = "nf_conntrack_count",
 617                 .data           = &init_net.ct.count,
 618                 .maxlen         = sizeof(int),
 619                 .mode           = 0444,
 620                 .proc_handler   = proc_dointvec,
 621         },
 622         [NF_SYSCTL_CT_BUCKETS] = {
 623                 .procname       = "nf_conntrack_buckets",
 624                 .data           = &nf_conntrack_htable_size_user,
 625                 .maxlen         = sizeof(unsigned int),
 626                 .mode           = 0644,
 627                 .proc_handler   = nf_conntrack_hash_sysctl,
 628         },
 629         [NF_SYSCTL_CT_CHECKSUM] = {
 630                 .procname       = "nf_conntrack_checksum",
 631                 .data           = &init_net.ct.sysctl_checksum,
 632                 .maxlen         = sizeof(int),
 633                 .mode           = 0644,
 634                 .proc_handler   = proc_dointvec_minmax,
 635                 .extra1         = SYSCTL_ZERO,
 636                 .extra2         = SYSCTL_ONE,
 637         },
 638         [NF_SYSCTL_CT_LOG_INVALID] = {
 639                 .procname       = "nf_conntrack_log_invalid",
 640                 .data           = &init_net.ct.sysctl_log_invalid,
 641                 .maxlen         = sizeof(unsigned int),
 642                 .mode           = 0644,
 643                 .proc_handler   = proc_dointvec_minmax,
 644                 .extra1         = &log_invalid_proto_min,
 645                 .extra2         = &log_invalid_proto_max,
 646         },
 647         [NF_SYSCTL_CT_EXPECT_MAX] = {
 648                 .procname       = "nf_conntrack_expect_max",
 649                 .data           = &nf_ct_expect_max,
 650                 .maxlen         = sizeof(int),
 651                 .mode           = 0644,
 652                 .proc_handler   = proc_dointvec,
 653         },
 654         [NF_SYSCTL_CT_ACCT] = {
 655                 .procname       = "nf_conntrack_acct",
 656                 .data           = &init_net.ct.sysctl_acct,
 657                 .maxlen         = sizeof(int),
 658                 .mode           = 0644,
 659                 .proc_handler   = proc_dointvec_minmax,
 660                 .extra1         = SYSCTL_ZERO,
 661                 .extra2         = SYSCTL_ONE,
 662         },
 663         [NF_SYSCTL_CT_HELPER] = {
 664                 .procname       = "nf_conntrack_helper",
 665                 .data           = &init_net.ct.sysctl_auto_assign_helper,
 666                 .maxlen         = sizeof(int),
 667                 .mode           = 0644,
 668                 .proc_handler   = proc_dointvec_minmax,
 669                 .extra1         = SYSCTL_ZERO,
 670                 .extra2         = SYSCTL_ONE,
 671         },
 672 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 673         [NF_SYSCTL_CT_EVENTS] = {
 674                 .procname       = "nf_conntrack_events",
 675                 .data           = &init_net.ct.sysctl_events,
 676                 .maxlen         = sizeof(int),
 677                 .mode           = 0644,
 678                 .proc_handler   = proc_dointvec_minmax,
 679                 .extra1         = SYSCTL_ZERO,
 680                 .extra2         = SYSCTL_ONE,
 681         },
 682 #endif
 683 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 684         [NF_SYSCTL_CT_TIMESTAMP] = {
 685                 .procname       = "nf_conntrack_timestamp",
 686                 .data           = &init_net.ct.sysctl_tstamp,
 687                 .maxlen         = sizeof(int),
 688                 .mode           = 0644,
 689                 .proc_handler   = proc_dointvec_minmax,
 690                 .extra1         = SYSCTL_ZERO,
 691                 .extra2         = SYSCTL_ONE,
 692         },
 693 #endif
 694         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 695                 .procname       = "nf_conntrack_generic_timeout",
 696                 .maxlen         = sizeof(unsigned int),
 697                 .mode           = 0644,
 698                 .proc_handler   = proc_dointvec_jiffies,
 699         },
 700         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 701                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 702                 .maxlen         = sizeof(unsigned int),
 703                 .mode           = 0644,
 704                 .proc_handler   = proc_dointvec_jiffies,
 705         },
 706         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 707                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 708                 .maxlen         = sizeof(unsigned int),
 709                 .mode           = 0644,
 710                 .proc_handler   = proc_dointvec_jiffies,
 711         },
 712         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 713                 .procname       = "nf_conntrack_tcp_timeout_established",
 714                 .maxlen         = sizeof(unsigned int),
 715                 .mode           = 0644,
 716                 .proc_handler   = proc_dointvec_jiffies,
 717         },
 718         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 719                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 720                 .maxlen         = sizeof(unsigned int),
 721                 .mode           = 0644,
 722                 .proc_handler   = proc_dointvec_jiffies,
 723         },
 724         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 725                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 726                 .maxlen         = sizeof(unsigned int),
 727                 .mode           = 0644,
 728                 .proc_handler   = proc_dointvec_jiffies,
 729         },
 730         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 731                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 732                 .maxlen         = sizeof(unsigned int),
 733                 .mode           = 0644,
 734                 .proc_handler   = proc_dointvec_jiffies,
 735         },
 736         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 737                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 738                 .maxlen         = sizeof(unsigned int),
 739                 .mode           = 0644,
 740                 .proc_handler   = proc_dointvec_jiffies,
 741         },
 742         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 743                 .procname       = "nf_conntrack_tcp_timeout_close",
 744                 .maxlen         = sizeof(unsigned int),
 745                 .mode           = 0644,
 746                 .proc_handler   = proc_dointvec_jiffies,
 747         },
 748         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 749                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 750                 .maxlen         = sizeof(unsigned int),
 751                 .mode           = 0644,
 752                 .proc_handler   = proc_dointvec_jiffies,
 753         },
 754         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 755                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 756                 .maxlen         = sizeof(unsigned int),
 757                 .mode           = 0644,
 758                 .proc_handler   = proc_dointvec_jiffies,
 759         },
 760         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 761                 .procname       = "nf_conntrack_tcp_loose",
 762                 .maxlen         = sizeof(int),
 763                 .mode           = 0644,
 764                 .proc_handler   = proc_dointvec_minmax,
 765                 .extra1         = SYSCTL_ZERO,
 766                 .extra2         = SYSCTL_ONE,
 767         },
 768         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 769                 .procname       = "nf_conntrack_tcp_be_liberal",
 770                 .maxlen         = sizeof(int),
 771                 .mode           = 0644,
 772                 .proc_handler   = proc_dointvec_minmax,
 773                 .extra1         = SYSCTL_ZERO,
 774                 .extra2         = SYSCTL_ONE,
 775         },
 776         [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
 777                 .procname       = "nf_conntrack_tcp_max_retrans",
 778                 .maxlen         = sizeof(unsigned int),
 779                 .mode           = 0644,
 780                 .proc_handler   = proc_dointvec,
 781         },
 782         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 783                 .procname       = "nf_conntrack_udp_timeout",
 784                 .maxlen         = sizeof(unsigned int),
 785                 .mode           = 0644,
 786                 .proc_handler   = proc_dointvec_jiffies,
 787         },
 788         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 789                 .procname       = "nf_conntrack_udp_timeout_stream",
 790                 .maxlen         = sizeof(unsigned int),
 791                 .mode           = 0644,
 792                 .proc_handler   = proc_dointvec_jiffies,
 793         },
 794         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 795                 .procname       = "nf_conntrack_icmp_timeout",
 796                 .maxlen         = sizeof(unsigned int),
 797                 .mode           = 0644,
 798                 .proc_handler   = proc_dointvec_jiffies,
 799         },
 800         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 801                 .procname       = "nf_conntrack_icmpv6_timeout",
 802                 .maxlen         = sizeof(unsigned int),
 803                 .mode           = 0644,
 804                 .proc_handler   = proc_dointvec_jiffies,
 805         },
 806 #ifdef CONFIG_NF_CT_PROTO_SCTP
 807         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 808                 .procname       = "nf_conntrack_sctp_timeout_closed",
 809                 .maxlen         = sizeof(unsigned int),
 810                 .mode           = 0644,
 811                 .proc_handler   = proc_dointvec_jiffies,
 812         },
 813         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 814                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 815                 .maxlen         = sizeof(unsigned int),
 816                 .mode           = 0644,
 817                 .proc_handler   = proc_dointvec_jiffies,
 818         },
 819         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 820                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 821                 .maxlen         = sizeof(unsigned int),
 822                 .mode           = 0644,
 823                 .proc_handler   = proc_dointvec_jiffies,
 824         },
 825         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 826                 .procname       = "nf_conntrack_sctp_timeout_established",
 827                 .maxlen         = sizeof(unsigned int),
 828                 .mode           = 0644,
 829                 .proc_handler   = proc_dointvec_jiffies,
 830         },
 831         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 832                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 833                 .maxlen         = sizeof(unsigned int),
 834                 .mode           = 0644,
 835                 .proc_handler   = proc_dointvec_jiffies,
 836         },
 837         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 838                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 839                 .maxlen         = sizeof(unsigned int),
 840                 .mode           = 0644,
 841                 .proc_handler   = proc_dointvec_jiffies,
 842         },
 843         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 844                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 845                 .maxlen         = sizeof(unsigned int),
 846                 .mode           = 0644,
 847                 .proc_handler   = proc_dointvec_jiffies,
 848         },
 849         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 850                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 851                 .maxlen         = sizeof(unsigned int),
 852                 .mode           = 0644,
 853                 .proc_handler   = proc_dointvec_jiffies,
 854         },
 855         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
 856                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_acked",
 857                 .maxlen         = sizeof(unsigned int),
 858                 .mode           = 0644,
 859                 .proc_handler   = proc_dointvec_jiffies,
 860         },
 861 #endif
 862 #ifdef CONFIG_NF_CT_PROTO_DCCP
 863         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 864                 .procname       = "nf_conntrack_dccp_timeout_request",
 865                 .maxlen         = sizeof(unsigned int),
 866                 .mode           = 0644,
 867                 .proc_handler   = proc_dointvec_jiffies,
 868         },
 869         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 870                 .procname       = "nf_conntrack_dccp_timeout_respond",
 871                 .maxlen         = sizeof(unsigned int),
 872                 .mode           = 0644,
 873                 .proc_handler   = proc_dointvec_jiffies,
 874         },
 875         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 876                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 877                 .maxlen         = sizeof(unsigned int),
 878                 .mode           = 0644,
 879                 .proc_handler   = proc_dointvec_jiffies,
 880         },
 881         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 882                 .procname       = "nf_conntrack_dccp_timeout_open",
 883                 .maxlen         = sizeof(unsigned int),
 884                 .mode           = 0644,
 885                 .proc_handler   = proc_dointvec_jiffies,
 886         },
 887         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 888                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 889                 .maxlen         = sizeof(unsigned int),
 890                 .mode           = 0644,
 891                 .proc_handler   = proc_dointvec_jiffies,
 892         },
 893         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 894                 .procname       = "nf_conntrack_dccp_timeout_closing",
 895                 .maxlen         = sizeof(unsigned int),
 896                 .mode           = 0644,
 897                 .proc_handler   = proc_dointvec_jiffies,
 898         },
 899         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 900                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 901                 .maxlen         = sizeof(unsigned int),
 902                 .mode           = 0644,
 903                 .proc_handler   = proc_dointvec_jiffies,
 904         },
 905         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 906                 .procname       = "nf_conntrack_dccp_loose",
 907                 .maxlen         = sizeof(int),
 908                 .mode           = 0644,
 909                 .proc_handler   = proc_dointvec_minmax,
 910                 .extra1         = SYSCTL_ZERO,
 911                 .extra2         = SYSCTL_ONE,
 912         },
 913 #endif
 914 #ifdef CONFIG_NF_CT_PROTO_GRE
 915         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 916                 .procname       = "nf_conntrack_gre_timeout",
 917                 .maxlen         = sizeof(unsigned int),
 918                 .mode           = 0644,
 919                 .proc_handler   = proc_dointvec_jiffies,
 920         },
 921         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 922                 .procname       = "nf_conntrack_gre_timeout_stream",
 923                 .maxlen         = sizeof(unsigned int),
 924                 .mode           = 0644,
 925                 .proc_handler   = proc_dointvec_jiffies,
 926         },
 927 #endif
 928         {}
 929 };
 930
 931 static struct ctl_table nf_ct_netfilter_table[] = {
 932         {
 933                 .procname       = "nf_conntrack_max",
 934                 .data           = &nf_conntrack_max,
 935                 .maxlen         = sizeof(int),
 936                 .mode           = 0644,
 937                 .proc_handler   = proc_dointvec,
 938         },
 939         { }
 940 };
 941
 942 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 943                                                     struct ctl_table *table)
 944 {
 945         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 946
 947 #define XASSIGN(XNAME, tn) \
 948         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 949                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 950
 951         XASSIGN(SYN_SENT, tn);
 952         XASSIGN(SYN_RECV, tn);
 953         XASSIGN(ESTABLISHED, tn);
 954         XASSIGN(FIN_WAIT, tn);
 955         XASSIGN(CLOSE_WAIT, tn);
 956         XASSIGN(LAST_ACK, tn);
 957         XASSIGN(TIME_WAIT, tn);
 958         XASSIGN(CLOSE, tn);
 959         XASSIGN(RETRANS, tn);
 960         XASSIGN(UNACK, tn);
 961 #undef XASSIGN
 962 #define XASSIGN(XNAME, rval) \
 963         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
 964
 965         XASSIGN(LOOSE, &tn->tcp_loose);
 966         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
 967         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
 968 #undef XASSIGN
 969 }
 970
 971 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
 972                                                      struct ctl_table *table)
 973 {
 974 #ifdef CONFIG_NF_CT_PROTO_SCTP
 975         struct nf_sctp_net *sn = nf_sctp_pernet(net);
 976
 977 #define XASSIGN(XNAME, sn) \
 978         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
 979                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
 980
 981         XASSIGN(CLOSED, sn);
 982         XASSIGN(COOKIE_WAIT, sn);
 983         XASSIGN(COOKIE_ECHOED, sn);
 984         XASSIGN(ESTABLISHED, sn);
 985         XASSIGN(SHUTDOWN_SENT, sn);
 986         XASSIGN(SHUTDOWN_RECD, sn);
 987         XASSIGN(SHUTDOWN_ACK_SENT, sn);
 988         XASSIGN(HEARTBEAT_SENT, sn);
 989         XASSIGN(HEARTBEAT_ACKED, sn);
 990 #undef XASSIGN
 991 #endif
 992 }
 993
 994 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
 995                                                      struct ctl_table *table)
 996 {
 997 #ifdef CONFIG_NF_CT_PROTO_DCCP
 998         struct nf_dccp_net *dn = nf_dccp_pernet(net);
 999
1000 #define XASSIGN(XNAME, dn) \
1001         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1002                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1003
1004         XASSIGN(REQUEST, dn);
1005         XASSIGN(RESPOND, dn);
1006         XASSIGN(PARTOPEN, dn);
1007         XASSIGN(OPEN, dn);
1008         XASSIGN(CLOSEREQ, dn);
1009         XASSIGN(CLOSING, dn);
1010         XASSIGN(TIMEWAIT, dn);
1011 #undef XASSIGN
1012
1013         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1014 #endif
1015 }
1016
1017 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1018                                                     struct ctl_table *table)
1019 {
1020 #ifdef CONFIG_NF_CT_PROTO_GRE
1021         struct nf_gre_net *gn = nf_gre_pernet(net);
1022
1023         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1024         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1025 #endif
1026 }
1027
1028 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1029 {
1030         struct nf_udp_net *un = nf_udp_pernet(net);
1031         struct ctl_table *table;
1032
1033         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1034
1035         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1036                         GFP_KERNEL);
1037         if (!table)
1038                 return -ENOMEM;
1039
1040         table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
1041         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1042         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1043         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1044         table[NF_SYSCTL_CT_HELPER].data = &net->ct.sysctl_auto_assign_helper;
1045 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1046         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1047 #endif
1048 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1049         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1050 #endif
1051         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1052         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1053         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1054         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1055         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1056
1057         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1058         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1059         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1060         nf_conntrack_standalone_init_gre_sysctl(net, table);
1061
1062         /* Don't allow unprivileged users to alter certain sysctls */
1063         if (net->user_ns != &init_user_ns) {
1064                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1065                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1066                 table[NF_SYSCTL_CT_HELPER].mode = 0444;
1067 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1068                 table[NF_SYSCTL_CT_EVENTS].mode = 0444;
1069 #endif
1070                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1071         } else if (!net_eq(&init_net, net)) {
1072                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1073         }
1074
1075         net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1076         if (!net->ct.sysctl_header)
1077                 goto out_unregister_netfilter;
1078
1079         return 0;
1080
1081 out_unregister_netfilter:
1082         kfree(table);
1083         return -ENOMEM;
1084 }
1085
1086 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1087 {
1088         struct ctl_table *table;
1089
1090         table = net->ct.sysctl_header->ctl_table_arg;
1091         unregister_net_sysctl_table(net->ct.sysctl_header);
1092         kfree(table);
1093 }
1094 #else
1095 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1096 {
1097         return 0;
1098 }
1099
1100 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1101 {
1102 }
1103 #endif /* CONFIG_SYSCTL */
1104
1105 static void nf_conntrack_fini_net(struct net *net)
1106 {
1107         if (enable_hooks)
1108                 nf_ct_netns_put(net, NFPROTO_INET);
1109
1110         nf_conntrack_standalone_fini_proc(net);
1111         nf_conntrack_standalone_fini_sysctl(net);
1112 }
1113
1114 static int nf_conntrack_pernet_init(struct net *net)
1115 {
1116         int ret;
1117
1118         net->ct.sysctl_checksum = 1;
1119
1120         ret = nf_conntrack_standalone_init_sysctl(net);
1121         if (ret < 0)
1122                 return ret;
1123
1124         ret = nf_conntrack_standalone_init_proc(net);
1125         if (ret < 0)
1126                 goto out_proc;
1127
1128         ret = nf_conntrack_init_net(net);
1129         if (ret < 0)
1130                 goto out_init_net;
1131
1132         if (enable_hooks) {
1133                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1134                 if (ret < 0)
1135                         goto out_hooks;
1136         }
1137
1138         return 0;
1139
1140 out_hooks:
1141         nf_conntrack_cleanup_net(net);
1142 out_init_net:
1143         nf_conntrack_standalone_fini_proc(net);
1144 out_proc:
1145         nf_conntrack_standalone_fini_sysctl(net);
1146         return ret;
1147 }
1148
1149 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1150 {
1151         struct net *net;
1152
1153         list_for_each_entry(net, net_exit_list, exit_list)
1154                 nf_conntrack_fini_net(net);
1155
1156         nf_conntrack_cleanup_net_list(net_exit_list);
1157 }
1158
1159 static struct pernet_operations nf_conntrack_net_ops = {
1160         .init           = nf_conntrack_pernet_init,
1161         .exit_batch     = nf_conntrack_pernet_exit,
1162         .id             = &nf_conntrack_net_id,
1163         .size = sizeof(struct nf_conntrack_net),
1164 };
1165
1166 static int __init nf_conntrack_standalone_init(void)
1167 {
1168         int ret = nf_conntrack_init_start();
1169         if (ret < 0)
1170                 goto out_start;
1171
1172         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1173
1174 #ifdef CONFIG_SYSCTL
1175         nf_ct_netfilter_header =
1176                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1177         if (!nf_ct_netfilter_header) {
1178                 pr_err("nf_conntrack: can't register to sysctl.\n");
1179                 ret = -ENOMEM;
1180                 goto out_sysctl;
1181         }
1182
1183         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1184 #endif
1185
1186         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1187         if (ret < 0)
1188                 goto out_pernet;
1189
1190         nf_conntrack_init_end();
1191         return 0;
1192
1193 out_pernet:
1194 #ifdef CONFIG_SYSCTL
1195         unregister_net_sysctl_table(nf_ct_netfilter_header);
1196 out_sysctl:
1197 #endif
1198         nf_conntrack_cleanup_end();
1199 out_start:
1200         return ret;
1201 }
1202
1203 static void __exit nf_conntrack_standalone_fini(void)
1204 {
1205         nf_conntrack_cleanup_start();
1206         unregister_pernet_subsys(&nf_conntrack_net_ops);
1207 #ifdef CONFIG_SYSCTL
1208         unregister_net_sysctl_table(nf_ct_netfilter_header);
1209 #endif
1210         nf_conntrack_cleanup_end();
1211 }
1212
1213 module_init(nf_conntrack_standalone_init);
1214 module_exit(nf_conntrack_standalone_fini);