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         case IPPROTO_ICMPV6: return "icmpv6";
 270         }
 271
 272         return "unknown";
 273 }
 274
 275 static unsigned int
 276 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 277 {
 278         struct nf_conn_acct *acct;
 279         struct nf_conn_counter *counter;
 280
 281         acct = nf_conn_acct_find(ct);
 282         if (!acct)
 283                 return 0;
 284
 285         counter = acct->counter;
 286         seq_printf(s, "packets=%llu bytes=%llu ",
 287                    (unsigned long long)atomic64_read(&counter[dir].packets),
 288                    (unsigned long long)atomic64_read(&counter[dir].bytes));
 289
 290         return 0;
 291 }
 292
 293 /* return 0 on success, 1 in case of error */
 294 static int ct_seq_show(struct seq_file *s, void *v)
 295 {
 296         struct nf_conntrack_tuple_hash *hash = v;
 297         struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
 298         const struct nf_conntrack_l4proto *l4proto;
 299         struct net *net = seq_file_net(s);
 300         int ret = 0;
 301
 302         WARN_ON(!ct);
 303         if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
 304                 return 0;
 305
 306         if (nf_ct_should_gc(ct)) {
 307                 nf_ct_kill(ct);
 308                 goto release;
 309         }
 310
 311         /* we only want to print DIR_ORIGINAL */
 312         if (NF_CT_DIRECTION(hash))
 313                 goto release;
 314
 315         if (!net_eq(nf_ct_net(ct), net))
 316                 goto release;
 317
 318         l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 319
 320         ret = -ENOSPC;
 321         seq_printf(s, "%-8s %u %-8s %u ",
 322                    l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
 323                    l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
 324
 325         if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
 326                 seq_printf(s, "%ld ", nf_ct_expires(ct)  / HZ);
 327
 328         if (l4proto->print_conntrack)
 329                 l4proto->print_conntrack(s, ct);
 330
 331         print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
 332                     l4proto);
 333
 334         ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
 335
 336         if (seq_has_overflowed(s))
 337                 goto release;
 338
 339         if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
 340                 goto release;
 341
 342         if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
 343                 seq_puts(s, "[UNREPLIED] ");
 344
 345         print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
 346
 347         ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
 348
 349         if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
 350                 goto release;
 351
 352         if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
 353                 seq_puts(s, "[HW_OFFLOAD] ");
 354         else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
 355                 seq_puts(s, "[OFFLOAD] ");
 356         else if (test_bit(IPS_ASSURED_BIT, &ct->status))
 357                 seq_puts(s, "[ASSURED] ");
 358
 359         if (seq_has_overflowed(s))
 360                 goto release;
 361
 362 #if defined(CONFIG_NF_CONNTRACK_MARK)
 363         seq_printf(s, "mark=%u ", ct->mark);
 364 #endif
 365
 366         ct_show_secctx(s, ct);
 367         ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
 368         ct_show_delta_time(s, ct);
 369
 370         seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
 371
 372         if (seq_has_overflowed(s))
 373                 goto release;
 374
 375         ret = 0;
 376 release:
 377         nf_ct_put(ct);
 378         return ret;
 379 }
 380
 381 static const struct seq_operations ct_seq_ops = {
 382         .start = ct_seq_start,
 383         .next  = ct_seq_next,
 384         .stop  = ct_seq_stop,
 385         .show  = ct_seq_show
 386 };
 387
 388 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 389 {
 390         struct net *net = seq_file_net(seq);
 391         int cpu;
 392
 393         if (*pos == 0)
 394                 return SEQ_START_TOKEN;
 395
 396         for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
 397                 if (!cpu_possible(cpu))
 398                         continue;
 399                 *pos = cpu + 1;
 400                 return per_cpu_ptr(net->ct.stat, cpu);
 401         }
 402
 403         return NULL;
 404 }
 405
 406 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 407 {
 408         struct net *net = seq_file_net(seq);
 409         int cpu;
 410
 411         for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
 412                 if (!cpu_possible(cpu))
 413                         continue;
 414                 *pos = cpu + 1;
 415                 return per_cpu_ptr(net->ct.stat, cpu);
 416         }
 417         (*pos)++;
 418         return NULL;
 419 }
 420
 421 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 422 {
 423 }
 424
 425 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 426 {
 427         struct net *net = seq_file_net(seq);
 428         const struct ip_conntrack_stat *st = v;
 429         unsigned int nr_conntracks;
 430
 431         if (v == SEQ_START_TOKEN) {
 432                 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");
 433                 return 0;
 434         }
 435
 436         nr_conntracks = nf_conntrack_count(net);
 437
 438         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
 439                         "%08x %08x %08x %08x %08x  %08x %08x %08x %08x\n",
 440                    nr_conntracks,
 441                    st->clash_resolve,
 442                    st->found,
 443                    0,
 444                    st->invalid,
 445                    0,
 446                    0,
 447                    0,
 448                    st->insert,
 449                    st->insert_failed,
 450                    st->drop,
 451                    st->early_drop,
 452                    st->error,
 453
 454                    st->expect_new,
 455                    st->expect_create,
 456                    st->expect_delete,
 457                    st->search_restart
 458                 );
 459         return 0;
 460 }
 461
 462 static const struct seq_operations ct_cpu_seq_ops = {
 463         .start  = ct_cpu_seq_start,
 464         .next   = ct_cpu_seq_next,
 465         .stop   = ct_cpu_seq_stop,
 466         .show   = ct_cpu_seq_show,
 467 };
 468
 469 static int nf_conntrack_standalone_init_proc(struct net *net)
 470 {
 471         struct proc_dir_entry *pde;
 472         kuid_t root_uid;
 473         kgid_t root_gid;
 474
 475         pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
 476                         sizeof(struct ct_iter_state));
 477         if (!pde)
 478                 goto out_nf_conntrack;
 479
 480         root_uid = make_kuid(net->user_ns, 0);
 481         root_gid = make_kgid(net->user_ns, 0);
 482         if (uid_valid(root_uid) && gid_valid(root_gid))
 483                 proc_set_user(pde, root_uid, root_gid);
 484
 485         pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
 486                         &ct_cpu_seq_ops, sizeof(struct seq_net_private));
 487         if (!pde)
 488                 goto out_stat_nf_conntrack;
 489         return 0;
 490
 491 out_stat_nf_conntrack:
 492         remove_proc_entry("nf_conntrack", net->proc_net);
 493 out_nf_conntrack:
 494         return -ENOMEM;
 495 }
 496
 497 static void nf_conntrack_standalone_fini_proc(struct net *net)
 498 {
 499         remove_proc_entry("nf_conntrack", net->proc_net_stat);
 500         remove_proc_entry("nf_conntrack", net->proc_net);
 501 }
 502 #else
 503 static int nf_conntrack_standalone_init_proc(struct net *net)
 504 {
 505         return 0;
 506 }
 507
 508 static void nf_conntrack_standalone_fini_proc(struct net *net)
 509 {
 510 }
 511 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
 512
 513 u32 nf_conntrack_count(const struct net *net)
 514 {
 515         const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
 516
 517         return atomic_read(&cnet->count);
 518 }
 519 EXPORT_SYMBOL_GPL(nf_conntrack_count);
 520
 521 /* Sysctl support */
 522
 523 #ifdef CONFIG_SYSCTL
 524 /* size the user *wants to set */
 525 static unsigned int nf_conntrack_htable_size_user __read_mostly;
 526
 527 static int
 528 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
 529                          void *buffer, size_t *lenp, loff_t *ppos)
 530 {
 531         int ret;
 532
 533         /* module_param hashsize could have changed value */
 534         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 535
 536         ret = proc_dointvec(table, write, buffer, lenp, ppos);
 537         if (ret < 0 || !write)
 538                 return ret;
 539
 540         /* update ret, we might not be able to satisfy request */
 541         ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
 542
 543         /* update it to the actual value used by conntrack */
 544         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 545         return ret;
 546 }
 547
 548 static struct ctl_table_header *nf_ct_netfilter_header;
 549
 550 enum nf_ct_sysctl_index {
 551         NF_SYSCTL_CT_MAX,
 552         NF_SYSCTL_CT_COUNT,
 553         NF_SYSCTL_CT_BUCKETS,
 554         NF_SYSCTL_CT_CHECKSUM,
 555         NF_SYSCTL_CT_LOG_INVALID,
 556         NF_SYSCTL_CT_EXPECT_MAX,
 557         NF_SYSCTL_CT_ACCT,
 558         NF_SYSCTL_CT_HELPER,
 559 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 560         NF_SYSCTL_CT_EVENTS,
 561 #endif
 562 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 563         NF_SYSCTL_CT_TIMESTAMP,
 564 #endif
 565         NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
 566         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
 567         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
 568         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
 569         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
 570         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
 571         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
 572         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
 573         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
 574         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
 575         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
 576 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 577         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
 578         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD_PICKUP,
 579 #endif
 580         NF_SYSCTL_CT_PROTO_TCP_LOOSE,
 581         NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
 582         NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
 583         NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
 584         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
 585         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
 586 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 587         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
 588         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD_PICKUP,
 589 #endif
 590         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 591         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 592 #ifdef CONFIG_NF_CT_PROTO_SCTP
 593         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 594         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 595         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 596         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 597         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 598         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 599         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 600         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 601         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
 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
 618         __NF_SYSCTL_CT_LAST_SYSCTL,
 619 };
 620
 621 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
 622
 623 static struct ctl_table nf_ct_sysctl_table[] = {
 624         [NF_SYSCTL_CT_MAX] = {
 625                 .procname       = "nf_conntrack_max",
 626                 .data           = &nf_conntrack_max,
 627                 .maxlen         = sizeof(int),
 628                 .mode           = 0644,
 629                 .proc_handler   = proc_dointvec,
 630         },
 631         [NF_SYSCTL_CT_COUNT] = {
 632                 .procname       = "nf_conntrack_count",
 633                 .maxlen         = sizeof(int),
 634                 .mode           = 0444,
 635                 .proc_handler   = proc_dointvec,
 636         },
 637         [NF_SYSCTL_CT_BUCKETS] = {
 638                 .procname       = "nf_conntrack_buckets",
 639                 .data           = &nf_conntrack_htable_size_user,
 640                 .maxlen         = sizeof(unsigned int),
 641                 .mode           = 0644,
 642                 .proc_handler   = nf_conntrack_hash_sysctl,
 643         },
 644         [NF_SYSCTL_CT_CHECKSUM] = {
 645                 .procname       = "nf_conntrack_checksum",
 646                 .data           = &init_net.ct.sysctl_checksum,
 647                 .maxlen         = sizeof(u8),
 648                 .mode           = 0644,
 649                 .proc_handler   = proc_dou8vec_minmax,
 650                 .extra1         = SYSCTL_ZERO,
 651                 .extra2         = SYSCTL_ONE,
 652         },
 653         [NF_SYSCTL_CT_LOG_INVALID] = {
 654                 .procname       = "nf_conntrack_log_invalid",
 655                 .data           = &init_net.ct.sysctl_log_invalid,
 656                 .maxlen         = sizeof(u8),
 657                 .mode           = 0644,
 658                 .proc_handler   = proc_dou8vec_minmax,
 659         },
 660         [NF_SYSCTL_CT_EXPECT_MAX] = {
 661                 .procname       = "nf_conntrack_expect_max",
 662                 .data           = &nf_ct_expect_max,
 663                 .maxlen         = sizeof(int),
 664                 .mode           = 0644,
 665                 .proc_handler   = proc_dointvec,
 666         },
 667         [NF_SYSCTL_CT_ACCT] = {
 668                 .procname       = "nf_conntrack_acct",
 669                 .data           = &init_net.ct.sysctl_acct,
 670                 .maxlen         = sizeof(u8),
 671                 .mode           = 0644,
 672                 .proc_handler   = proc_dou8vec_minmax,
 673                 .extra1         = SYSCTL_ZERO,
 674                 .extra2         = SYSCTL_ONE,
 675         },
 676         [NF_SYSCTL_CT_HELPER] = {
 677                 .procname       = "nf_conntrack_helper",
 678                 .maxlen         = sizeof(u8),
 679                 .mode           = 0644,
 680                 .proc_handler   = proc_dou8vec_minmax,
 681                 .extra1         = SYSCTL_ZERO,
 682                 .extra2         = SYSCTL_ONE,
 683         },
 684 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 685         [NF_SYSCTL_CT_EVENTS] = {
 686                 .procname       = "nf_conntrack_events",
 687                 .data           = &init_net.ct.sysctl_events,
 688                 .maxlen         = sizeof(u8),
 689                 .mode           = 0644,
 690                 .proc_handler   = proc_dou8vec_minmax,
 691                 .extra1         = SYSCTL_ZERO,
 692                 .extra2         = SYSCTL_ONE,
 693         },
 694 #endif
 695 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 696         [NF_SYSCTL_CT_TIMESTAMP] = {
 697                 .procname       = "nf_conntrack_timestamp",
 698                 .data           = &init_net.ct.sysctl_tstamp,
 699                 .maxlen         = sizeof(u8),
 700                 .mode           = 0644,
 701                 .proc_handler   = proc_dou8vec_minmax,
 702                 .extra1         = SYSCTL_ZERO,
 703                 .extra2         = SYSCTL_ONE,
 704         },
 705 #endif
 706         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 707                 .procname       = "nf_conntrack_generic_timeout",
 708                 .maxlen         = sizeof(unsigned int),
 709                 .mode           = 0644,
 710                 .proc_handler   = proc_dointvec_jiffies,
 711         },
 712         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 713                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 714                 .maxlen         = sizeof(unsigned int),
 715                 .mode           = 0644,
 716                 .proc_handler   = proc_dointvec_jiffies,
 717         },
 718         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 719                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 720                 .maxlen         = sizeof(unsigned int),
 721                 .mode           = 0644,
 722                 .proc_handler   = proc_dointvec_jiffies,
 723         },
 724         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 725                 .procname       = "nf_conntrack_tcp_timeout_established",
 726                 .maxlen         = sizeof(unsigned int),
 727                 .mode           = 0644,
 728                 .proc_handler   = proc_dointvec_jiffies,
 729         },
 730         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 731                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 732                 .maxlen         = sizeof(unsigned int),
 733                 .mode           = 0644,
 734                 .proc_handler   = proc_dointvec_jiffies,
 735         },
 736         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 737                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 738                 .maxlen         = sizeof(unsigned int),
 739                 .mode           = 0644,
 740                 .proc_handler   = proc_dointvec_jiffies,
 741         },
 742         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 743                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 744                 .maxlen         = sizeof(unsigned int),
 745                 .mode           = 0644,
 746                 .proc_handler   = proc_dointvec_jiffies,
 747         },
 748         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 749                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 750                 .maxlen         = sizeof(unsigned int),
 751                 .mode           = 0644,
 752                 .proc_handler   = proc_dointvec_jiffies,
 753         },
 754         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 755                 .procname       = "nf_conntrack_tcp_timeout_close",
 756                 .maxlen         = sizeof(unsigned int),
 757                 .mode           = 0644,
 758                 .proc_handler   = proc_dointvec_jiffies,
 759         },
 760         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 761                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 762                 .maxlen         = sizeof(unsigned int),
 763                 .mode           = 0644,
 764                 .proc_handler   = proc_dointvec_jiffies,
 765         },
 766         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 767                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 768                 .maxlen         = sizeof(unsigned int),
 769                 .mode           = 0644,
 770                 .proc_handler   = proc_dointvec_jiffies,
 771         },
 772 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 773         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
 774                 .procname       = "nf_flowtable_tcp_timeout",
 775                 .maxlen         = sizeof(unsigned int),
 776                 .mode           = 0644,
 777                 .proc_handler   = proc_dointvec_jiffies,
 778         },
 779         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD_PICKUP] = {
 780                 .procname       = "nf_flowtable_tcp_pickup",
 781                 .maxlen         = sizeof(unsigned int),
 782                 .mode           = 0644,
 783                 .proc_handler   = proc_dointvec_jiffies,
 784         },
 785 #endif
 786         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 787                 .procname       = "nf_conntrack_tcp_loose",
 788                 .maxlen         = sizeof(u8),
 789                 .mode           = 0644,
 790                 .proc_handler   = proc_dou8vec_minmax,
 791                 .extra1         = SYSCTL_ZERO,
 792                 .extra2         = SYSCTL_ONE,
 793         },
 794         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 795                 .procname       = "nf_conntrack_tcp_be_liberal",
 796                 .maxlen         = sizeof(u8),
 797                 .mode           = 0644,
 798                 .proc_handler   = proc_dou8vec_minmax,
 799                 .extra1         = SYSCTL_ZERO,
 800                 .extra2         = SYSCTL_ONE,
 801         },
 802         [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
 803                 .procname       = "nf_conntrack_tcp_ignore_invalid_rst",
 804                 .maxlen         = sizeof(u8),
 805                 .mode           = 0644,
 806                 .proc_handler   = proc_dou8vec_minmax,
 807                 .extra1         = SYSCTL_ZERO,
 808                 .extra2         = SYSCTL_ONE,
 809         },
 810         [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
 811                 .procname       = "nf_conntrack_tcp_max_retrans",
 812                 .maxlen         = sizeof(u8),
 813                 .mode           = 0644,
 814                 .proc_handler   = proc_dou8vec_minmax,
 815         },
 816         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 817                 .procname       = "nf_conntrack_udp_timeout",
 818                 .maxlen         = sizeof(unsigned int),
 819                 .mode           = 0644,
 820                 .proc_handler   = proc_dointvec_jiffies,
 821         },
 822         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 823                 .procname       = "nf_conntrack_udp_timeout_stream",
 824                 .maxlen         = sizeof(unsigned int),
 825                 .mode           = 0644,
 826                 .proc_handler   = proc_dointvec_jiffies,
 827         },
 828 #if IS_ENABLED(CONFIG_NFT_FLOW_OFFLOAD)
 829         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
 830                 .procname       = "nf_flowtable_udp_timeout",
 831                 .maxlen         = sizeof(unsigned int),
 832                 .mode           = 0644,
 833                 .proc_handler   = proc_dointvec_jiffies,
 834         },
 835         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD_PICKUP] = {
 836                 .procname       = "nf_flowtable_udp_pickup",
 837                 .maxlen         = sizeof(unsigned int),
 838                 .mode           = 0644,
 839                 .proc_handler   = proc_dointvec_jiffies,
 840         },
 841 #endif
 842         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 843                 .procname       = "nf_conntrack_icmp_timeout",
 844                 .maxlen         = sizeof(unsigned int),
 845                 .mode           = 0644,
 846                 .proc_handler   = proc_dointvec_jiffies,
 847         },
 848         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 849                 .procname       = "nf_conntrack_icmpv6_timeout",
 850                 .maxlen         = sizeof(unsigned int),
 851                 .mode           = 0644,
 852                 .proc_handler   = proc_dointvec_jiffies,
 853         },
 854 #ifdef CONFIG_NF_CT_PROTO_SCTP
 855         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 856                 .procname       = "nf_conntrack_sctp_timeout_closed",
 857                 .maxlen         = sizeof(unsigned int),
 858                 .mode           = 0644,
 859                 .proc_handler   = proc_dointvec_jiffies,
 860         },
 861         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 862                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 863                 .maxlen         = sizeof(unsigned int),
 864                 .mode           = 0644,
 865                 .proc_handler   = proc_dointvec_jiffies,
 866         },
 867         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 868                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 869                 .maxlen         = sizeof(unsigned int),
 870                 .mode           = 0644,
 871                 .proc_handler   = proc_dointvec_jiffies,
 872         },
 873         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 874                 .procname       = "nf_conntrack_sctp_timeout_established",
 875                 .maxlen         = sizeof(unsigned int),
 876                 .mode           = 0644,
 877                 .proc_handler   = proc_dointvec_jiffies,
 878         },
 879         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 880                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 881                 .maxlen         = sizeof(unsigned int),
 882                 .mode           = 0644,
 883                 .proc_handler   = proc_dointvec_jiffies,
 884         },
 885         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 886                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 887                 .maxlen         = sizeof(unsigned int),
 888                 .mode           = 0644,
 889                 .proc_handler   = proc_dointvec_jiffies,
 890         },
 891         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 892                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 893                 .maxlen         = sizeof(unsigned int),
 894                 .mode           = 0644,
 895                 .proc_handler   = proc_dointvec_jiffies,
 896         },
 897         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 898                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 899                 .maxlen         = sizeof(unsigned int),
 900                 .mode           = 0644,
 901                 .proc_handler   = proc_dointvec_jiffies,
 902         },
 903         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
 904                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_acked",
 905                 .maxlen         = sizeof(unsigned int),
 906                 .mode           = 0644,
 907                 .proc_handler   = proc_dointvec_jiffies,
 908         },
 909 #endif
 910 #ifdef CONFIG_NF_CT_PROTO_DCCP
 911         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 912                 .procname       = "nf_conntrack_dccp_timeout_request",
 913                 .maxlen         = sizeof(unsigned int),
 914                 .mode           = 0644,
 915                 .proc_handler   = proc_dointvec_jiffies,
 916         },
 917         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 918                 .procname       = "nf_conntrack_dccp_timeout_respond",
 919                 .maxlen         = sizeof(unsigned int),
 920                 .mode           = 0644,
 921                 .proc_handler   = proc_dointvec_jiffies,
 922         },
 923         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 924                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 925                 .maxlen         = sizeof(unsigned int),
 926                 .mode           = 0644,
 927                 .proc_handler   = proc_dointvec_jiffies,
 928         },
 929         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 930                 .procname       = "nf_conntrack_dccp_timeout_open",
 931                 .maxlen         = sizeof(unsigned int),
 932                 .mode           = 0644,
 933                 .proc_handler   = proc_dointvec_jiffies,
 934         },
 935         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 936                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 937                 .maxlen         = sizeof(unsigned int),
 938                 .mode           = 0644,
 939                 .proc_handler   = proc_dointvec_jiffies,
 940         },
 941         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 942                 .procname       = "nf_conntrack_dccp_timeout_closing",
 943                 .maxlen         = sizeof(unsigned int),
 944                 .mode           = 0644,
 945                 .proc_handler   = proc_dointvec_jiffies,
 946         },
 947         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 948                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 949                 .maxlen         = sizeof(unsigned int),
 950                 .mode           = 0644,
 951                 .proc_handler   = proc_dointvec_jiffies,
 952         },
 953         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 954                 .procname       = "nf_conntrack_dccp_loose",
 955                 .maxlen         = sizeof(u8),
 956                 .mode           = 0644,
 957                 .proc_handler   = proc_dou8vec_minmax,
 958                 .extra1         = SYSCTL_ZERO,
 959                 .extra2         = SYSCTL_ONE,
 960         },
 961 #endif
 962 #ifdef CONFIG_NF_CT_PROTO_GRE
 963         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 964                 .procname       = "nf_conntrack_gre_timeout",
 965                 .maxlen         = sizeof(unsigned int),
 966                 .mode           = 0644,
 967                 .proc_handler   = proc_dointvec_jiffies,
 968         },
 969         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 970                 .procname       = "nf_conntrack_gre_timeout_stream",
 971                 .maxlen         = sizeof(unsigned int),
 972                 .mode           = 0644,
 973                 .proc_handler   = proc_dointvec_jiffies,
 974         },
 975 #endif
 976         {}
 977 };
 978
 979 static struct ctl_table nf_ct_netfilter_table[] = {
 980         {
 981                 .procname       = "nf_conntrack_max",
 982                 .data           = &nf_conntrack_max,
 983                 .maxlen         = sizeof(int),
 984                 .mode           = 0644,
 985                 .proc_handler   = proc_dointvec,
 986         },
 987         { }
 988 };
 989
 990 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 991                                                     struct ctl_table *table)
 992 {
 993         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 994
 995 #define XASSIGN(XNAME, tn) \
 996         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 997                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 998
 999         XASSIGN(SYN_SENT, tn);
1000         XASSIGN(SYN_RECV, tn);
1001         XASSIGN(ESTABLISHED, tn);
1002         XASSIGN(FIN_WAIT, tn);
1003         XASSIGN(CLOSE_WAIT, tn);
1004         XASSIGN(LAST_ACK, tn);
1005         XASSIGN(TIME_WAIT, tn);
1006         XASSIGN(CLOSE, tn);
1007         XASSIGN(RETRANS, tn);
1008         XASSIGN(UNACK, tn);
1009 #undef XASSIGN
1010 #define XASSIGN(XNAME, rval) \
1011         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
1012
1013         XASSIGN(LOOSE, &tn->tcp_loose);
1014         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
1015         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
1016         XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
1017 #undef XASSIGN
1018
1019 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1020         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1021         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD_PICKUP].data = &tn->offload_pickup;
1022 #endif
1023
1024 }
1025
1026 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1027                                                      struct ctl_table *table)
1028 {
1029 #ifdef CONFIG_NF_CT_PROTO_SCTP
1030         struct nf_sctp_net *sn = nf_sctp_pernet(net);
1031
1032 #define XASSIGN(XNAME, sn) \
1033         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1034                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1035
1036         XASSIGN(CLOSED, sn);
1037         XASSIGN(COOKIE_WAIT, sn);
1038         XASSIGN(COOKIE_ECHOED, sn);
1039         XASSIGN(ESTABLISHED, sn);
1040         XASSIGN(SHUTDOWN_SENT, sn);
1041         XASSIGN(SHUTDOWN_RECD, sn);
1042         XASSIGN(SHUTDOWN_ACK_SENT, sn);
1043         XASSIGN(HEARTBEAT_SENT, sn);
1044         XASSIGN(HEARTBEAT_ACKED, sn);
1045 #undef XASSIGN
1046 #endif
1047 }
1048
1049 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1050                                                      struct ctl_table *table)
1051 {
1052 #ifdef CONFIG_NF_CT_PROTO_DCCP
1053         struct nf_dccp_net *dn = nf_dccp_pernet(net);
1054
1055 #define XASSIGN(XNAME, dn) \
1056         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1057                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1058
1059         XASSIGN(REQUEST, dn);
1060         XASSIGN(RESPOND, dn);
1061         XASSIGN(PARTOPEN, dn);
1062         XASSIGN(OPEN, dn);
1063         XASSIGN(CLOSEREQ, dn);
1064         XASSIGN(CLOSING, dn);
1065         XASSIGN(TIMEWAIT, dn);
1066 #undef XASSIGN
1067
1068         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1069 #endif
1070 }
1071
1072 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1073                                                     struct ctl_table *table)
1074 {
1075 #ifdef CONFIG_NF_CT_PROTO_GRE
1076         struct nf_gre_net *gn = nf_gre_pernet(net);
1077
1078         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1079         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1080 #endif
1081 }
1082
1083 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1084 {
1085         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1086         struct nf_udp_net *un = nf_udp_pernet(net);
1087         struct ctl_table *table;
1088
1089         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1090
1091         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1092                         GFP_KERNEL);
1093         if (!table)
1094                 return -ENOMEM;
1095
1096         table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1097         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1098         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1099         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1100         table[NF_SYSCTL_CT_HELPER].data = &cnet->sysctl_auto_assign_helper;
1101 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1102         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1103 #endif
1104 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1105         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1106 #endif
1107         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1108         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1109         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1110         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1111         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1112 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1113         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1114         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD_PICKUP].data = &un->offload_pickup;
1115 #endif
1116
1117         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1118         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1119         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1120         nf_conntrack_standalone_init_gre_sysctl(net, table);
1121
1122         /* Don't allow non-init_net ns to alter global sysctls */
1123         if (!net_eq(&init_net, net)) {
1124                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1125                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1126                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1127         }
1128
1129         cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1130         if (!cnet->sysctl_header)
1131                 goto out_unregister_netfilter;
1132
1133         return 0;
1134
1135 out_unregister_netfilter:
1136         kfree(table);
1137         return -ENOMEM;
1138 }
1139
1140 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1141 {
1142         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1143         struct ctl_table *table;
1144
1145         table = cnet->sysctl_header->ctl_table_arg;
1146         unregister_net_sysctl_table(cnet->sysctl_header);
1147         kfree(table);
1148 }
1149 #else
1150 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1151 {
1152         return 0;
1153 }
1154
1155 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1156 {
1157 }
1158 #endif /* CONFIG_SYSCTL */
1159
1160 static void nf_conntrack_fini_net(struct net *net)
1161 {
1162         if (enable_hooks)
1163                 nf_ct_netns_put(net, NFPROTO_INET);
1164
1165         nf_conntrack_standalone_fini_proc(net);
1166         nf_conntrack_standalone_fini_sysctl(net);
1167 }
1168
1169 static int nf_conntrack_pernet_init(struct net *net)
1170 {
1171         int ret;
1172
1173         net->ct.sysctl_checksum = 1;
1174
1175         ret = nf_conntrack_standalone_init_sysctl(net);
1176         if (ret < 0)
1177                 return ret;
1178
1179         ret = nf_conntrack_standalone_init_proc(net);
1180         if (ret < 0)
1181                 goto out_proc;
1182
1183         ret = nf_conntrack_init_net(net);
1184         if (ret < 0)
1185                 goto out_init_net;
1186
1187         if (enable_hooks) {
1188                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1189                 if (ret < 0)
1190                         goto out_hooks;
1191         }
1192
1193         return 0;
1194
1195 out_hooks:
1196         nf_conntrack_cleanup_net(net);
1197 out_init_net:
1198         nf_conntrack_standalone_fini_proc(net);
1199 out_proc:
1200         nf_conntrack_standalone_fini_sysctl(net);
1201         return ret;
1202 }
1203
1204 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1205 {
1206         struct net *net;
1207
1208         list_for_each_entry(net, net_exit_list, exit_list)
1209                 nf_conntrack_fini_net(net);
1210
1211         nf_conntrack_cleanup_net_list(net_exit_list);
1212 }
1213
1214 static struct pernet_operations nf_conntrack_net_ops = {
1215         .init           = nf_conntrack_pernet_init,
1216         .exit_batch     = nf_conntrack_pernet_exit,
1217         .id             = &nf_conntrack_net_id,
1218         .size = sizeof(struct nf_conntrack_net),
1219 };
1220
1221 static int __init nf_conntrack_standalone_init(void)
1222 {
1223         int ret = nf_conntrack_init_start();
1224         if (ret < 0)
1225                 goto out_start;
1226
1227         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1228
1229 #ifdef CONFIG_SYSCTL
1230         nf_ct_netfilter_header =
1231                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1232         if (!nf_ct_netfilter_header) {
1233                 pr_err("nf_conntrack: can't register to sysctl.\n");
1234                 ret = -ENOMEM;
1235                 goto out_sysctl;
1236         }
1237
1238         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1239 #endif
1240
1241         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1242         if (ret < 0)
1243                 goto out_pernet;
1244
1245         nf_conntrack_init_end();
1246         return 0;
1247
1248 out_pernet:
1249 #ifdef CONFIG_SYSCTL
1250         unregister_net_sysctl_table(nf_ct_netfilter_header);
1251 out_sysctl:
1252 #endif
1253         nf_conntrack_cleanup_end();
1254 out_start:
1255         return ret;
1256 }
1257
1258 static void __exit nf_conntrack_standalone_fini(void)
1259 {
1260         nf_conntrack_cleanup_start();
1261         unregister_pernet_subsys(&nf_conntrack_net_ops);
1262 #ifdef CONFIG_SYSCTL
1263         unregister_net_sysctl_table(nf_ct_netfilter_header);
1264 #endif
1265         nf_conntrack_cleanup_end();
1266 }
1267
1268 module_init(nf_conntrack_standalone_init);
1269 module_exit(nf_conntrack_standalone_fini);