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 #ifdef CONFIG_LWTUNNEL
  26 #include <net/netfilter/nf_hooks_lwtunnel.h>
  27 #endif
  28 #include <linux/rculist_nulls.h>
  29
  30 static bool enable_hooks __read_mostly;
  31 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
  32 module_param(enable_hooks, bool, 0000);
  33
  34 unsigned int nf_conntrack_net_id __read_mostly;
  35
  36 #ifdef CONFIG_NF_CONNTRACK_PROCFS
  37 void
  38 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
  39             const struct nf_conntrack_l4proto *l4proto)
  40 {
  41         switch (tuple->src.l3num) {
  42         case NFPROTO_IPV4:
  43                 seq_printf(s, "src=%pI4 dst=%pI4 ",
  44                            &tuple->src.u3.ip, &tuple->dst.u3.ip);
  45                 break;
  46         case NFPROTO_IPV6:
  47                 seq_printf(s, "src=%pI6 dst=%pI6 ",
  48                            tuple->src.u3.ip6, tuple->dst.u3.ip6);
  49                 break;
  50         default:
  51                 break;
  52         }
  53
  54         switch (l4proto->l4proto) {
  55         case IPPROTO_ICMP:
  56                 seq_printf(s, "type=%u code=%u id=%u ",
  57                            tuple->dst.u.icmp.type,
  58                            tuple->dst.u.icmp.code,
  59                            ntohs(tuple->src.u.icmp.id));
  60                 break;
  61         case IPPROTO_TCP:
  62                 seq_printf(s, "sport=%hu dport=%hu ",
  63                            ntohs(tuple->src.u.tcp.port),
  64                            ntohs(tuple->dst.u.tcp.port));
  65                 break;
  66         case IPPROTO_UDPLITE:
  67         case IPPROTO_UDP:
  68                 seq_printf(s, "sport=%hu dport=%hu ",
  69                            ntohs(tuple->src.u.udp.port),
  70                            ntohs(tuple->dst.u.udp.port));
  71
  72                 break;
  73         case IPPROTO_DCCP:
  74                 seq_printf(s, "sport=%hu dport=%hu ",
  75                            ntohs(tuple->src.u.dccp.port),
  76                            ntohs(tuple->dst.u.dccp.port));
  77                 break;
  78         case IPPROTO_SCTP:
  79                 seq_printf(s, "sport=%hu dport=%hu ",
  80                            ntohs(tuple->src.u.sctp.port),
  81                            ntohs(tuple->dst.u.sctp.port));
  82                 break;
  83         case IPPROTO_ICMPV6:
  84                 seq_printf(s, "type=%u code=%u id=%u ",
  85                            tuple->dst.u.icmp.type,
  86                            tuple->dst.u.icmp.code,
  87                            ntohs(tuple->src.u.icmp.id));
  88                 break;
  89         case IPPROTO_GRE:
  90                 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
  91                            ntohs(tuple->src.u.gre.key),
  92                            ntohs(tuple->dst.u.gre.key));
  93                 break;
  94         default:
  95                 break;
  96         }
  97 }
  98 EXPORT_SYMBOL_GPL(print_tuple);
  99
 100 struct ct_iter_state {
 101         struct seq_net_private p;
 102         struct hlist_nulls_head *hash;
 103         unsigned int htable_size;
 104         unsigned int bucket;
 105         u_int64_t time_now;
 106 };
 107
 108 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
 109 {
 110         struct ct_iter_state *st = seq->private;
 111         struct hlist_nulls_node *n;
 112
 113         for (st->bucket = 0;
 114              st->bucket < st->htable_size;
 115              st->bucket++) {
 116                 n = rcu_dereference(
 117                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 118                 if (!is_a_nulls(n))
 119                         return n;
 120         }
 121         return NULL;
 122 }
 123
 124 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
 125                                       struct hlist_nulls_node *head)
 126 {
 127         struct ct_iter_state *st = seq->private;
 128
 129         head = rcu_dereference(hlist_nulls_next_rcu(head));
 130         while (is_a_nulls(head)) {
 131                 if (likely(get_nulls_value(head) == st->bucket)) {
 132                         if (++st->bucket >= st->htable_size)
 133                                 return NULL;
 134                 }
 135                 head = rcu_dereference(
 136                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 137         }
 138         return head;
 139 }
 140
 141 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
 142 {
 143         struct hlist_nulls_node *head = ct_get_first(seq);
 144
 145         if (head)
 146                 while (pos && (head = ct_get_next(seq, head)))
 147                         pos--;
 148         return pos ? NULL : head;
 149 }
 150
 151 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
 152         __acquires(RCU)
 153 {
 154         struct ct_iter_state *st = seq->private;
 155
 156         st->time_now = ktime_get_real_ns();
 157         rcu_read_lock();
 158
 159         nf_conntrack_get_ht(&st->hash, &st->htable_size);
 160         return ct_get_idx(seq, *pos);
 161 }
 162
 163 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
 164 {
 165         (*pos)++;
 166         return ct_get_next(s, v);
 167 }
 168
 169 static void ct_seq_stop(struct seq_file *s, void *v)
 170         __releases(RCU)
 171 {
 172         rcu_read_unlock();
 173 }
 174
 175 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 176 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 177 {
 178         int ret;
 179         u32 len;
 180         char *secctx;
 181
 182         ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
 183         if (ret)
 184                 return;
 185
 186         seq_printf(s, "secctx=%s ", secctx);
 187
 188         security_release_secctx(secctx, len);
 189 }
 190 #else
 191 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 192 {
 193 }
 194 #endif
 195
 196 #ifdef CONFIG_NF_CONNTRACK_ZONES
 197 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 198                          int dir)
 199 {
 200         const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
 201
 202         if (zone->dir != dir)
 203                 return;
 204         switch (zone->dir) {
 205         case NF_CT_DEFAULT_ZONE_DIR:
 206                 seq_printf(s, "zone=%u ", zone->id);
 207                 break;
 208         case NF_CT_ZONE_DIR_ORIG:
 209                 seq_printf(s, "zone-orig=%u ", zone->id);
 210                 break;
 211         case NF_CT_ZONE_DIR_REPL:
 212                 seq_printf(s, "zone-reply=%u ", zone->id);
 213                 break;
 214         default:
 215                 break;
 216         }
 217 }
 218 #else
 219 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 220                                 int dir)
 221 {
 222 }
 223 #endif
 224
 225 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 226 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 227 {
 228         struct ct_iter_state *st = s->private;
 229         struct nf_conn_tstamp *tstamp;
 230         s64 delta_time;
 231
 232         tstamp = nf_conn_tstamp_find(ct);
 233         if (tstamp) {
 234                 delta_time = st->time_now - tstamp->start;
 235                 if (delta_time > 0)
 236                         delta_time = div_s64(delta_time, NSEC_PER_SEC);
 237                 else
 238                         delta_time = 0;
 239
 240                 seq_printf(s, "delta-time=%llu ",
 241                            (unsigned long long)delta_time);
 242         }
 243         return;
 244 }
 245 #else
 246 static inline void
 247 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 248 {
 249 }
 250 #endif
 251
 252 static const char* l3proto_name(u16 proto)
 253 {
 254         switch (proto) {
 255         case AF_INET: return "ipv4";
 256         case AF_INET6: return "ipv6";
 257         }
 258
 259         return "unknown";
 260 }
 261
 262 static const char* l4proto_name(u16 proto)
 263 {
 264         switch (proto) {
 265         case IPPROTO_ICMP: return "icmp";
 266         case IPPROTO_TCP: return "tcp";
 267         case IPPROTO_UDP: return "udp";
 268         case IPPROTO_DCCP: return "dccp";
 269         case IPPROTO_GRE: return "gre";
 270         case IPPROTO_SCTP: return "sctp";
 271         case IPPROTO_UDPLITE: return "udplite";
 272         case IPPROTO_ICMPV6: return "icmpv6";
 273         }
 274
 275         return "unknown";
 276 }
 277
 278 static unsigned int
 279 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 280 {
 281         struct nf_conn_acct *acct;
 282         struct nf_conn_counter *counter;
 283
 284         acct = nf_conn_acct_find(ct);
 285         if (!acct)
 286                 return 0;
 287
 288         counter = acct->counter;
 289         seq_printf(s, "packets=%llu bytes=%llu ",
 290                    (unsigned long long)atomic64_read(&counter[dir].packets),
 291                    (unsigned long long)atomic64_read(&counter[dir].bytes));
 292
 293         return 0;
 294 }
 295
 296 /* return 0 on success, 1 in case of error */
 297 static int ct_seq_show(struct seq_file *s, void *v)
 298 {
 299         struct nf_conntrack_tuple_hash *hash = v;
 300         struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
 301         const struct nf_conntrack_l4proto *l4proto;
 302         struct net *net = seq_file_net(s);
 303         int ret = 0;
 304
 305         WARN_ON(!ct);
 306         if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
 307                 return 0;
 308
 309         if (nf_ct_should_gc(ct)) {
 310                 nf_ct_kill(ct);
 311                 goto release;
 312         }
 313
 314         /* we only want to print DIR_ORIGINAL */
 315         if (NF_CT_DIRECTION(hash))
 316                 goto release;
 317
 318         if (!net_eq(nf_ct_net(ct), net))
 319                 goto release;
 320
 321         l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 322
 323         ret = -ENOSPC;
 324         seq_printf(s, "%-8s %u %-8s %u ",
 325                    l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
 326                    l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
 327
 328         if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
 329                 seq_printf(s, "%ld ", nf_ct_expires(ct)  / HZ);
 330
 331         if (l4proto->print_conntrack)
 332                 l4proto->print_conntrack(s, ct);
 333
 334         print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
 335                     l4proto);
 336
 337         ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
 338
 339         if (seq_has_overflowed(s))
 340                 goto release;
 341
 342         if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
 343                 goto release;
 344
 345         if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
 346                 seq_puts(s, "[UNREPLIED] ");
 347
 348         print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
 349
 350         ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
 351
 352         if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
 353                 goto release;
 354
 355         if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
 356                 seq_puts(s, "[HW_OFFLOAD] ");
 357         else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
 358                 seq_puts(s, "[OFFLOAD] ");
 359         else if (test_bit(IPS_ASSURED_BIT, &ct->status))
 360                 seq_puts(s, "[ASSURED] ");
 361
 362         if (seq_has_overflowed(s))
 363                 goto release;
 364
 365 #if defined(CONFIG_NF_CONNTRACK_MARK)
 366         seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
 367 #endif
 368
 369         ct_show_secctx(s, ct);
 370         ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
 371         ct_show_delta_time(s, ct);
 372
 373         seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
 374
 375         if (seq_has_overflowed(s))
 376                 goto release;
 377
 378         ret = 0;
 379 release:
 380         nf_ct_put(ct);
 381         return ret;
 382 }
 383
 384 static const struct seq_operations ct_seq_ops = {
 385         .start = ct_seq_start,
 386         .next  = ct_seq_next,
 387         .stop  = ct_seq_stop,
 388         .show  = ct_seq_show
 389 };
 390
 391 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 392 {
 393         struct net *net = seq_file_net(seq);
 394         int cpu;
 395
 396         if (*pos == 0)
 397                 return SEQ_START_TOKEN;
 398
 399         for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
 400                 if (!cpu_possible(cpu))
 401                         continue;
 402                 *pos = cpu + 1;
 403                 return per_cpu_ptr(net->ct.stat, cpu);
 404         }
 405
 406         return NULL;
 407 }
 408
 409 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 410 {
 411         struct net *net = seq_file_net(seq);
 412         int cpu;
 413
 414         for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
 415                 if (!cpu_possible(cpu))
 416                         continue;
 417                 *pos = cpu + 1;
 418                 return per_cpu_ptr(net->ct.stat, cpu);
 419         }
 420         (*pos)++;
 421         return NULL;
 422 }
 423
 424 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 425 {
 426 }
 427
 428 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 429 {
 430         struct net *net = seq_file_net(seq);
 431         const struct ip_conntrack_stat *st = v;
 432         unsigned int nr_conntracks;
 433
 434         if (v == SEQ_START_TOKEN) {
 435                 seq_puts(seq, "entries  clashres found new invalid ignore delete chainlength insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete search_restart\n");
 436                 return 0;
 437         }
 438
 439         nr_conntracks = nf_conntrack_count(net);
 440
 441         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
 442                         "%08x %08x %08x %08x %08x  %08x %08x %08x %08x\n",
 443                    nr_conntracks,
 444                    st->clash_resolve,
 445                    st->found,
 446                    0,
 447                    st->invalid,
 448                    0,
 449                    0,
 450                    st->chaintoolong,
 451                    st->insert,
 452                    st->insert_failed,
 453                    st->drop,
 454                    st->early_drop,
 455                    st->error,
 456
 457                    st->expect_new,
 458                    st->expect_create,
 459                    st->expect_delete,
 460                    st->search_restart
 461                 );
 462         return 0;
 463 }
 464
 465 static const struct seq_operations ct_cpu_seq_ops = {
 466         .start  = ct_cpu_seq_start,
 467         .next   = ct_cpu_seq_next,
 468         .stop   = ct_cpu_seq_stop,
 469         .show   = ct_cpu_seq_show,
 470 };
 471
 472 static int nf_conntrack_standalone_init_proc(struct net *net)
 473 {
 474         struct proc_dir_entry *pde;
 475         kuid_t root_uid;
 476         kgid_t root_gid;
 477
 478         pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
 479                         sizeof(struct ct_iter_state));
 480         if (!pde)
 481                 goto out_nf_conntrack;
 482
 483         root_uid = make_kuid(net->user_ns, 0);
 484         root_gid = make_kgid(net->user_ns, 0);
 485         if (uid_valid(root_uid) && gid_valid(root_gid))
 486                 proc_set_user(pde, root_uid, root_gid);
 487
 488         pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
 489                         &ct_cpu_seq_ops, sizeof(struct seq_net_private));
 490         if (!pde)
 491                 goto out_stat_nf_conntrack;
 492         return 0;
 493
 494 out_stat_nf_conntrack:
 495         remove_proc_entry("nf_conntrack", net->proc_net);
 496 out_nf_conntrack:
 497         return -ENOMEM;
 498 }
 499
 500 static void nf_conntrack_standalone_fini_proc(struct net *net)
 501 {
 502         remove_proc_entry("nf_conntrack", net->proc_net_stat);
 503         remove_proc_entry("nf_conntrack", net->proc_net);
 504 }
 505 #else
 506 static int nf_conntrack_standalone_init_proc(struct net *net)
 507 {
 508         return 0;
 509 }
 510
 511 static void nf_conntrack_standalone_fini_proc(struct net *net)
 512 {
 513 }
 514 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
 515
 516 u32 nf_conntrack_count(const struct net *net)
 517 {
 518         const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
 519
 520         return atomic_read(&cnet->count);
 521 }
 522 EXPORT_SYMBOL_GPL(nf_conntrack_count);
 523
 524 /* Sysctl support */
 525
 526 #ifdef CONFIG_SYSCTL
 527 /* size the user *wants to set */
 528 static unsigned int nf_conntrack_htable_size_user __read_mostly;
 529
 530 static int
 531 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
 532                          void *buffer, size_t *lenp, loff_t *ppos)
 533 {
 534         int ret;
 535
 536         /* module_param hashsize could have changed value */
 537         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 538
 539         ret = proc_dointvec(table, write, buffer, lenp, ppos);
 540         if (ret < 0 || !write)
 541                 return ret;
 542
 543         /* update ret, we might not be able to satisfy request */
 544         ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
 545
 546         /* update it to the actual value used by conntrack */
 547         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 548         return ret;
 549 }
 550
 551 static struct ctl_table_header *nf_ct_netfilter_header;
 552
 553 enum nf_ct_sysctl_index {
 554         NF_SYSCTL_CT_MAX,
 555         NF_SYSCTL_CT_COUNT,
 556         NF_SYSCTL_CT_BUCKETS,
 557         NF_SYSCTL_CT_CHECKSUM,
 558         NF_SYSCTL_CT_LOG_INVALID,
 559         NF_SYSCTL_CT_EXPECT_MAX,
 560         NF_SYSCTL_CT_ACCT,
 561         NF_SYSCTL_CT_HELPER,
 562 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 563         NF_SYSCTL_CT_EVENTS,
 564 #endif
 565 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 566         NF_SYSCTL_CT_TIMESTAMP,
 567 #endif
 568         NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
 569         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
 570         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
 571         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
 572         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
 573         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
 574         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
 575         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
 576         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
 577         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
 578         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
 579 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 580         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
 581 #endif
 582         NF_SYSCTL_CT_PROTO_TCP_LOOSE,
 583         NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
 584         NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
 585         NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
 586         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
 587         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
 588 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 589         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
 590 #endif
 591         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 592         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 593 #ifdef CONFIG_NF_CT_PROTO_SCTP
 594         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 595         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 596         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 597         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 598         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 599         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 600         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 601         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 602 #endif
 603 #ifdef CONFIG_NF_CT_PROTO_DCCP
 604         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
 605         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
 606         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
 607         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
 608         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
 609         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
 610         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
 611         NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
 612 #endif
 613 #ifdef CONFIG_NF_CT_PROTO_GRE
 614         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
 615         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
 616 #endif
 617 #ifdef CONFIG_LWTUNNEL
 618         NF_SYSCTL_CT_LWTUNNEL,
 619 #endif
 620
 621         __NF_SYSCTL_CT_LAST_SYSCTL,
 622 };
 623
 624 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
 625
 626 static struct ctl_table nf_ct_sysctl_table[] = {
 627         [NF_SYSCTL_CT_MAX] = {
 628                 .procname       = "nf_conntrack_max",
 629                 .data           = &nf_conntrack_max,
 630                 .maxlen         = sizeof(int),
 631                 .mode           = 0644,
 632                 .proc_handler   = proc_dointvec,
 633         },
 634         [NF_SYSCTL_CT_COUNT] = {
 635                 .procname       = "nf_conntrack_count",
 636                 .maxlen         = sizeof(int),
 637                 .mode           = 0444,
 638                 .proc_handler   = proc_dointvec,
 639         },
 640         [NF_SYSCTL_CT_BUCKETS] = {
 641                 .procname       = "nf_conntrack_buckets",
 642                 .data           = &nf_conntrack_htable_size_user,
 643                 .maxlen         = sizeof(unsigned int),
 644                 .mode           = 0644,
 645                 .proc_handler   = nf_conntrack_hash_sysctl,
 646         },
 647         [NF_SYSCTL_CT_CHECKSUM] = {
 648                 .procname       = "nf_conntrack_checksum",
 649                 .data           = &init_net.ct.sysctl_checksum,
 650                 .maxlen         = sizeof(u8),
 651                 .mode           = 0644,
 652                 .proc_handler   = proc_dou8vec_minmax,
 653                 .extra1         = SYSCTL_ZERO,
 654                 .extra2         = SYSCTL_ONE,
 655         },
 656         [NF_SYSCTL_CT_LOG_INVALID] = {
 657                 .procname       = "nf_conntrack_log_invalid",
 658                 .data           = &init_net.ct.sysctl_log_invalid,
 659                 .maxlen         = sizeof(u8),
 660                 .mode           = 0644,
 661                 .proc_handler   = proc_dou8vec_minmax,
 662         },
 663         [NF_SYSCTL_CT_EXPECT_MAX] = {
 664                 .procname       = "nf_conntrack_expect_max",
 665                 .data           = &nf_ct_expect_max,
 666                 .maxlen         = sizeof(int),
 667                 .mode           = 0644,
 668                 .proc_handler   = proc_dointvec,
 669         },
 670         [NF_SYSCTL_CT_ACCT] = {
 671                 .procname       = "nf_conntrack_acct",
 672                 .data           = &init_net.ct.sysctl_acct,
 673                 .maxlen         = sizeof(u8),
 674                 .mode           = 0644,
 675                 .proc_handler   = proc_dou8vec_minmax,
 676                 .extra1         = SYSCTL_ZERO,
 677                 .extra2         = SYSCTL_ONE,
 678         },
 679         [NF_SYSCTL_CT_HELPER] = {
 680                 .procname       = "nf_conntrack_helper",
 681                 .maxlen         = sizeof(u8),
 682                 .mode           = 0644,
 683                 .proc_handler   = proc_dou8vec_minmax,
 684                 .extra1         = SYSCTL_ZERO,
 685                 .extra2         = SYSCTL_ONE,
 686         },
 687 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 688         [NF_SYSCTL_CT_EVENTS] = {
 689                 .procname       = "nf_conntrack_events",
 690                 .data           = &init_net.ct.sysctl_events,
 691                 .maxlen         = sizeof(u8),
 692                 .mode           = 0644,
 693                 .proc_handler   = proc_dou8vec_minmax,
 694                 .extra1         = SYSCTL_ZERO,
 695                 .extra2         = SYSCTL_ONE,
 696         },
 697 #endif
 698 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 699         [NF_SYSCTL_CT_TIMESTAMP] = {
 700                 .procname       = "nf_conntrack_timestamp",
 701                 .data           = &init_net.ct.sysctl_tstamp,
 702                 .maxlen         = sizeof(u8),
 703                 .mode           = 0644,
 704                 .proc_handler   = proc_dou8vec_minmax,
 705                 .extra1         = SYSCTL_ZERO,
 706                 .extra2         = SYSCTL_ONE,
 707         },
 708 #endif
 709         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 710                 .procname       = "nf_conntrack_generic_timeout",
 711                 .maxlen         = sizeof(unsigned int),
 712                 .mode           = 0644,
 713                 .proc_handler   = proc_dointvec_jiffies,
 714         },
 715         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 716                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 717                 .maxlen         = sizeof(unsigned int),
 718                 .mode           = 0644,
 719                 .proc_handler   = proc_dointvec_jiffies,
 720         },
 721         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 722                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 723                 .maxlen         = sizeof(unsigned int),
 724                 .mode           = 0644,
 725                 .proc_handler   = proc_dointvec_jiffies,
 726         },
 727         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 728                 .procname       = "nf_conntrack_tcp_timeout_established",
 729                 .maxlen         = sizeof(unsigned int),
 730                 .mode           = 0644,
 731                 .proc_handler   = proc_dointvec_jiffies,
 732         },
 733         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 734                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 735                 .maxlen         = sizeof(unsigned int),
 736                 .mode           = 0644,
 737                 .proc_handler   = proc_dointvec_jiffies,
 738         },
 739         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 740                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 741                 .maxlen         = sizeof(unsigned int),
 742                 .mode           = 0644,
 743                 .proc_handler   = proc_dointvec_jiffies,
 744         },
 745         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 746                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 747                 .maxlen         = sizeof(unsigned int),
 748                 .mode           = 0644,
 749                 .proc_handler   = proc_dointvec_jiffies,
 750         },
 751         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 752                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 753                 .maxlen         = sizeof(unsigned int),
 754                 .mode           = 0644,
 755                 .proc_handler   = proc_dointvec_jiffies,
 756         },
 757         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 758                 .procname       = "nf_conntrack_tcp_timeout_close",
 759                 .maxlen         = sizeof(unsigned int),
 760                 .mode           = 0644,
 761                 .proc_handler   = proc_dointvec_jiffies,
 762         },
 763         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 764                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 765                 .maxlen         = sizeof(unsigned int),
 766                 .mode           = 0644,
 767                 .proc_handler   = proc_dointvec_jiffies,
 768         },
 769         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 770                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 771                 .maxlen         = sizeof(unsigned int),
 772                 .mode           = 0644,
 773                 .proc_handler   = proc_dointvec_jiffies,
 774         },
 775 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 776         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
 777                 .procname       = "nf_flowtable_tcp_timeout",
 778                 .maxlen         = sizeof(unsigned int),
 779                 .mode           = 0644,
 780                 .proc_handler   = proc_dointvec_jiffies,
 781         },
 782 #endif
 783         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 784                 .procname       = "nf_conntrack_tcp_loose",
 785                 .maxlen         = sizeof(u8),
 786                 .mode           = 0644,
 787                 .proc_handler   = proc_dou8vec_minmax,
 788                 .extra1         = SYSCTL_ZERO,
 789                 .extra2         = SYSCTL_ONE,
 790         },
 791         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 792                 .procname       = "nf_conntrack_tcp_be_liberal",
 793                 .maxlen         = sizeof(u8),
 794                 .mode           = 0644,
 795                 .proc_handler   = proc_dou8vec_minmax,
 796                 .extra1         = SYSCTL_ZERO,
 797                 .extra2         = SYSCTL_ONE,
 798         },
 799         [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
 800                 .procname       = "nf_conntrack_tcp_ignore_invalid_rst",
 801                 .maxlen         = sizeof(u8),
 802                 .mode           = 0644,
 803                 .proc_handler   = proc_dou8vec_minmax,
 804                 .extra1         = SYSCTL_ZERO,
 805                 .extra2         = SYSCTL_ONE,
 806         },
 807         [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
 808                 .procname       = "nf_conntrack_tcp_max_retrans",
 809                 .maxlen         = sizeof(u8),
 810                 .mode           = 0644,
 811                 .proc_handler   = proc_dou8vec_minmax,
 812         },
 813         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 814                 .procname       = "nf_conntrack_udp_timeout",
 815                 .maxlen         = sizeof(unsigned int),
 816                 .mode           = 0644,
 817                 .proc_handler   = proc_dointvec_jiffies,
 818         },
 819         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 820                 .procname       = "nf_conntrack_udp_timeout_stream",
 821                 .maxlen         = sizeof(unsigned int),
 822                 .mode           = 0644,
 823                 .proc_handler   = proc_dointvec_jiffies,
 824         },
 825 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 826         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
 827                 .procname       = "nf_flowtable_udp_timeout",
 828                 .maxlen         = sizeof(unsigned int),
 829                 .mode           = 0644,
 830                 .proc_handler   = proc_dointvec_jiffies,
 831         },
 832 #endif
 833         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 834                 .procname       = "nf_conntrack_icmp_timeout",
 835                 .maxlen         = sizeof(unsigned int),
 836                 .mode           = 0644,
 837                 .proc_handler   = proc_dointvec_jiffies,
 838         },
 839         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 840                 .procname       = "nf_conntrack_icmpv6_timeout",
 841                 .maxlen         = sizeof(unsigned int),
 842                 .mode           = 0644,
 843                 .proc_handler   = proc_dointvec_jiffies,
 844         },
 845 #ifdef CONFIG_NF_CT_PROTO_SCTP
 846         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 847                 .procname       = "nf_conntrack_sctp_timeout_closed",
 848                 .maxlen         = sizeof(unsigned int),
 849                 .mode           = 0644,
 850                 .proc_handler   = proc_dointvec_jiffies,
 851         },
 852         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 853                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 854                 .maxlen         = sizeof(unsigned int),
 855                 .mode           = 0644,
 856                 .proc_handler   = proc_dointvec_jiffies,
 857         },
 858         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 859                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 860                 .maxlen         = sizeof(unsigned int),
 861                 .mode           = 0644,
 862                 .proc_handler   = proc_dointvec_jiffies,
 863         },
 864         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 865                 .procname       = "nf_conntrack_sctp_timeout_established",
 866                 .maxlen         = sizeof(unsigned int),
 867                 .mode           = 0644,
 868                 .proc_handler   = proc_dointvec_jiffies,
 869         },
 870         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 871                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 872                 .maxlen         = sizeof(unsigned int),
 873                 .mode           = 0644,
 874                 .proc_handler   = proc_dointvec_jiffies,
 875         },
 876         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 877                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 878                 .maxlen         = sizeof(unsigned int),
 879                 .mode           = 0644,
 880                 .proc_handler   = proc_dointvec_jiffies,
 881         },
 882         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 883                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 884                 .maxlen         = sizeof(unsigned int),
 885                 .mode           = 0644,
 886                 .proc_handler   = proc_dointvec_jiffies,
 887         },
 888         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 889                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 890                 .maxlen         = sizeof(unsigned int),
 891                 .mode           = 0644,
 892                 .proc_handler   = proc_dointvec_jiffies,
 893         },
 894 #endif
 895 #ifdef CONFIG_NF_CT_PROTO_DCCP
 896         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 897                 .procname       = "nf_conntrack_dccp_timeout_request",
 898                 .maxlen         = sizeof(unsigned int),
 899                 .mode           = 0644,
 900                 .proc_handler   = proc_dointvec_jiffies,
 901         },
 902         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 903                 .procname       = "nf_conntrack_dccp_timeout_respond",
 904                 .maxlen         = sizeof(unsigned int),
 905                 .mode           = 0644,
 906                 .proc_handler   = proc_dointvec_jiffies,
 907         },
 908         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 909                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 910                 .maxlen         = sizeof(unsigned int),
 911                 .mode           = 0644,
 912                 .proc_handler   = proc_dointvec_jiffies,
 913         },
 914         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 915                 .procname       = "nf_conntrack_dccp_timeout_open",
 916                 .maxlen         = sizeof(unsigned int),
 917                 .mode           = 0644,
 918                 .proc_handler   = proc_dointvec_jiffies,
 919         },
 920         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 921                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 922                 .maxlen         = sizeof(unsigned int),
 923                 .mode           = 0644,
 924                 .proc_handler   = proc_dointvec_jiffies,
 925         },
 926         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 927                 .procname       = "nf_conntrack_dccp_timeout_closing",
 928                 .maxlen         = sizeof(unsigned int),
 929                 .mode           = 0644,
 930                 .proc_handler   = proc_dointvec_jiffies,
 931         },
 932         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 933                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 934                 .maxlen         = sizeof(unsigned int),
 935                 .mode           = 0644,
 936                 .proc_handler   = proc_dointvec_jiffies,
 937         },
 938         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 939                 .procname       = "nf_conntrack_dccp_loose",
 940                 .maxlen         = sizeof(u8),
 941                 .mode           = 0644,
 942                 .proc_handler   = proc_dou8vec_minmax,
 943                 .extra1         = SYSCTL_ZERO,
 944                 .extra2         = SYSCTL_ONE,
 945         },
 946 #endif
 947 #ifdef CONFIG_NF_CT_PROTO_GRE
 948         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 949                 .procname       = "nf_conntrack_gre_timeout",
 950                 .maxlen         = sizeof(unsigned int),
 951                 .mode           = 0644,
 952                 .proc_handler   = proc_dointvec_jiffies,
 953         },
 954         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 955                 .procname       = "nf_conntrack_gre_timeout_stream",
 956                 .maxlen         = sizeof(unsigned int),
 957                 .mode           = 0644,
 958                 .proc_handler   = proc_dointvec_jiffies,
 959         },
 960 #endif
 961 #ifdef CONFIG_LWTUNNEL
 962         [NF_SYSCTL_CT_LWTUNNEL] = {
 963                 .procname       = "nf_hooks_lwtunnel",
 964                 .data           = NULL,
 965                 .maxlen         = sizeof(int),
 966                 .mode           = 0644,
 967                 .proc_handler   = nf_hooks_lwtunnel_sysctl_handler,
 968         },
 969 #endif
 970         {}
 971 };
 972
 973 static struct ctl_table nf_ct_netfilter_table[] = {
 974         {
 975                 .procname       = "nf_conntrack_max",
 976                 .data           = &nf_conntrack_max,
 977                 .maxlen         = sizeof(int),
 978                 .mode           = 0644,
 979                 .proc_handler   = proc_dointvec,
 980         },
 981         { }
 982 };
 983
 984 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 985                                                     struct ctl_table *table)
 986 {
 987         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 988
 989 #define XASSIGN(XNAME, tn) \
 990         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 991                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 992
 993         XASSIGN(SYN_SENT, tn);
 994         XASSIGN(SYN_RECV, tn);
 995         XASSIGN(ESTABLISHED, tn);
 996         XASSIGN(FIN_WAIT, tn);
 997         XASSIGN(CLOSE_WAIT, tn);
 998         XASSIGN(LAST_ACK, tn);
 999         XASSIGN(TIME_WAIT, tn);
1000         XASSIGN(CLOSE, tn);
1001         XASSIGN(RETRANS, tn);
1002         XASSIGN(UNACK, tn);
1003 #undef XASSIGN
1004 #define XASSIGN(XNAME, rval) \
1005         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
1006
1007         XASSIGN(LOOSE, &tn->tcp_loose);
1008         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
1009         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
1010         XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
1011 #undef XASSIGN
1012
1013 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1014         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1015 #endif
1016
1017 }
1018
1019 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1020                                                      struct ctl_table *table)
1021 {
1022 #ifdef CONFIG_NF_CT_PROTO_SCTP
1023         struct nf_sctp_net *sn = nf_sctp_pernet(net);
1024
1025 #define XASSIGN(XNAME, sn) \
1026         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1027                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1028
1029         XASSIGN(CLOSED, sn);
1030         XASSIGN(COOKIE_WAIT, sn);
1031         XASSIGN(COOKIE_ECHOED, sn);
1032         XASSIGN(ESTABLISHED, sn);
1033         XASSIGN(SHUTDOWN_SENT, sn);
1034         XASSIGN(SHUTDOWN_RECD, sn);
1035         XASSIGN(SHUTDOWN_ACK_SENT, sn);
1036         XASSIGN(HEARTBEAT_SENT, sn);
1037 #undef XASSIGN
1038 #endif
1039 }
1040
1041 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1042                                                      struct ctl_table *table)
1043 {
1044 #ifdef CONFIG_NF_CT_PROTO_DCCP
1045         struct nf_dccp_net *dn = nf_dccp_pernet(net);
1046
1047 #define XASSIGN(XNAME, dn) \
1048         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1049                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1050
1051         XASSIGN(REQUEST, dn);
1052         XASSIGN(RESPOND, dn);
1053         XASSIGN(PARTOPEN, dn);
1054         XASSIGN(OPEN, dn);
1055         XASSIGN(CLOSEREQ, dn);
1056         XASSIGN(CLOSING, dn);
1057         XASSIGN(TIMEWAIT, dn);
1058 #undef XASSIGN
1059
1060         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1061 #endif
1062 }
1063
1064 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1065                                                     struct ctl_table *table)
1066 {
1067 #ifdef CONFIG_NF_CT_PROTO_GRE
1068         struct nf_gre_net *gn = nf_gre_pernet(net);
1069
1070         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1071         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1072 #endif
1073 }
1074
1075 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1076 {
1077         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1078         struct nf_udp_net *un = nf_udp_pernet(net);
1079         struct ctl_table *table;
1080
1081         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1082
1083         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1084                         GFP_KERNEL);
1085         if (!table)
1086                 return -ENOMEM;
1087
1088         table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1089         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1090         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1091         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1092         table[NF_SYSCTL_CT_HELPER].data = &cnet->sysctl_auto_assign_helper;
1093 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1094         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1095 #endif
1096 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1097         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1098 #endif
1099         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1100         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1101         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1102         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1103         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1104 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1105         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1106 #endif
1107
1108         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1109         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1110         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1111         nf_conntrack_standalone_init_gre_sysctl(net, table);
1112
1113         /* Don't allow non-init_net ns to alter global sysctls */
1114         if (!net_eq(&init_net, net)) {
1115                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1116                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1117                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1118         }
1119
1120         cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1121         if (!cnet->sysctl_header)
1122                 goto out_unregister_netfilter;
1123
1124         return 0;
1125
1126 out_unregister_netfilter:
1127         kfree(table);
1128         return -ENOMEM;
1129 }
1130
1131 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1132 {
1133         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1134         struct ctl_table *table;
1135
1136         table = cnet->sysctl_header->ctl_table_arg;
1137         unregister_net_sysctl_table(cnet->sysctl_header);
1138         kfree(table);
1139 }
1140 #else
1141 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1142 {
1143         return 0;
1144 }
1145
1146 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1147 {
1148 }
1149 #endif /* CONFIG_SYSCTL */
1150
1151 static void nf_conntrack_fini_net(struct net *net)
1152 {
1153         if (enable_hooks)
1154                 nf_ct_netns_put(net, NFPROTO_INET);
1155
1156         nf_conntrack_standalone_fini_proc(net);
1157         nf_conntrack_standalone_fini_sysctl(net);
1158 }
1159
1160 static int nf_conntrack_pernet_init(struct net *net)
1161 {
1162         int ret;
1163
1164         net->ct.sysctl_checksum = 1;
1165
1166         ret = nf_conntrack_standalone_init_sysctl(net);
1167         if (ret < 0)
1168                 return ret;
1169
1170         ret = nf_conntrack_standalone_init_proc(net);
1171         if (ret < 0)
1172                 goto out_proc;
1173
1174         ret = nf_conntrack_init_net(net);
1175         if (ret < 0)
1176                 goto out_init_net;
1177
1178         if (enable_hooks) {
1179                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1180                 if (ret < 0)
1181                         goto out_hooks;
1182         }
1183
1184         return 0;
1185
1186 out_hooks:
1187         nf_conntrack_cleanup_net(net);
1188 out_init_net:
1189         nf_conntrack_standalone_fini_proc(net);
1190 out_proc:
1191         nf_conntrack_standalone_fini_sysctl(net);
1192         return ret;
1193 }
1194
1195 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1196 {
1197         struct net *net;
1198
1199         list_for_each_entry(net, net_exit_list, exit_list)
1200                 nf_conntrack_fini_net(net);
1201
1202         nf_conntrack_cleanup_net_list(net_exit_list);
1203 }
1204
1205 static struct pernet_operations nf_conntrack_net_ops = {
1206         .init           = nf_conntrack_pernet_init,
1207         .exit_batch     = nf_conntrack_pernet_exit,
1208         .id             = &nf_conntrack_net_id,
1209         .size = sizeof(struct nf_conntrack_net),
1210 };
1211
1212 static int __init nf_conntrack_standalone_init(void)
1213 {
1214         int ret = nf_conntrack_init_start();
1215         if (ret < 0)
1216                 goto out_start;
1217
1218         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1219
1220 #ifdef CONFIG_SYSCTL
1221         nf_ct_netfilter_header =
1222                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1223         if (!nf_ct_netfilter_header) {
1224                 pr_err("nf_conntrack: can't register to sysctl.\n");
1225                 ret = -ENOMEM;
1226                 goto out_sysctl;
1227         }
1228
1229         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1230 #endif
1231
1232         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1233         if (ret < 0)
1234                 goto out_pernet;
1235
1236         nf_conntrack_init_end();
1237         return 0;
1238
1239 out_pernet:
1240 #ifdef CONFIG_SYSCTL
1241         unregister_net_sysctl_table(nf_ct_netfilter_header);
1242 out_sysctl:
1243 #endif
1244         nf_conntrack_cleanup_end();
1245 out_start:
1246         return ret;
1247 }
1248
1249 static void __exit nf_conntrack_standalone_fini(void)
1250 {
1251         nf_conntrack_cleanup_start();
1252         unregister_pernet_subsys(&nf_conntrack_net_ops);
1253 #ifdef CONFIG_SYSCTL
1254         unregister_net_sysctl_table(nf_ct_netfilter_header);
1255 #endif
1256         nf_conntrack_cleanup_end();
1257 }
1258
1259 module_init(nf_conntrack_standalone_init);
1260 module_exit(nf_conntrack_standalone_fini);