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 #endif
 579         NF_SYSCTL_CT_PROTO_TCP_LOOSE,
 580         NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
 581         NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
 582         NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
 583         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
 584         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
 585 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 586         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
 587 #endif
 588         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 589         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 590 #ifdef CONFIG_NF_CT_PROTO_SCTP
 591         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 592         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 593         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 594         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 595         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 596         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 597         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 598         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 599         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
 600 #endif
 601 #ifdef CONFIG_NF_CT_PROTO_DCCP
 602         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
 603         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
 604         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
 605         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
 606         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
 607         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
 608         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
 609         NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
 610 #endif
 611 #ifdef CONFIG_NF_CT_PROTO_GRE
 612         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
 613         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
 614 #endif
 615
 616         __NF_SYSCTL_CT_LAST_SYSCTL,
 617 };
 618
 619 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
 620
 621 static struct ctl_table nf_ct_sysctl_table[] = {
 622         [NF_SYSCTL_CT_MAX] = {
 623                 .procname       = "nf_conntrack_max",
 624                 .data           = &nf_conntrack_max,
 625                 .maxlen         = sizeof(int),
 626                 .mode           = 0644,
 627                 .proc_handler   = proc_dointvec,
 628         },
 629         [NF_SYSCTL_CT_COUNT] = {
 630                 .procname       = "nf_conntrack_count",
 631                 .maxlen         = sizeof(int),
 632                 .mode           = 0444,
 633                 .proc_handler   = proc_dointvec,
 634         },
 635         [NF_SYSCTL_CT_BUCKETS] = {
 636                 .procname       = "nf_conntrack_buckets",
 637                 .data           = &nf_conntrack_htable_size_user,
 638                 .maxlen         = sizeof(unsigned int),
 639                 .mode           = 0644,
 640                 .proc_handler   = nf_conntrack_hash_sysctl,
 641         },
 642         [NF_SYSCTL_CT_CHECKSUM] = {
 643                 .procname       = "nf_conntrack_checksum",
 644                 .data           = &init_net.ct.sysctl_checksum,
 645                 .maxlen         = sizeof(u8),
 646                 .mode           = 0644,
 647                 .proc_handler   = proc_dou8vec_minmax,
 648                 .extra1         = SYSCTL_ZERO,
 649                 .extra2         = SYSCTL_ONE,
 650         },
 651         [NF_SYSCTL_CT_LOG_INVALID] = {
 652                 .procname       = "nf_conntrack_log_invalid",
 653                 .data           = &init_net.ct.sysctl_log_invalid,
 654                 .maxlen         = sizeof(u8),
 655                 .mode           = 0644,
 656                 .proc_handler   = proc_dou8vec_minmax,
 657         },
 658         [NF_SYSCTL_CT_EXPECT_MAX] = {
 659                 .procname       = "nf_conntrack_expect_max",
 660                 .data           = &nf_ct_expect_max,
 661                 .maxlen         = sizeof(int),
 662                 .mode           = 0644,
 663                 .proc_handler   = proc_dointvec,
 664         },
 665         [NF_SYSCTL_CT_ACCT] = {
 666                 .procname       = "nf_conntrack_acct",
 667                 .data           = &init_net.ct.sysctl_acct,
 668                 .maxlen         = sizeof(u8),
 669                 .mode           = 0644,
 670                 .proc_handler   = proc_dou8vec_minmax,
 671                 .extra1         = SYSCTL_ZERO,
 672                 .extra2         = SYSCTL_ONE,
 673         },
 674         [NF_SYSCTL_CT_HELPER] = {
 675                 .procname       = "nf_conntrack_helper",
 676                 .maxlen         = sizeof(u8),
 677                 .mode           = 0644,
 678                 .proc_handler   = proc_dou8vec_minmax,
 679                 .extra1         = SYSCTL_ZERO,
 680                 .extra2         = SYSCTL_ONE,
 681         },
 682 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 683         [NF_SYSCTL_CT_EVENTS] = {
 684                 .procname       = "nf_conntrack_events",
 685                 .data           = &init_net.ct.sysctl_events,
 686                 .maxlen         = sizeof(u8),
 687                 .mode           = 0644,
 688                 .proc_handler   = proc_dou8vec_minmax,
 689                 .extra1         = SYSCTL_ZERO,
 690                 .extra2         = SYSCTL_ONE,
 691         },
 692 #endif
 693 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 694         [NF_SYSCTL_CT_TIMESTAMP] = {
 695                 .procname       = "nf_conntrack_timestamp",
 696                 .data           = &init_net.ct.sysctl_tstamp,
 697                 .maxlen         = sizeof(u8),
 698                 .mode           = 0644,
 699                 .proc_handler   = proc_dou8vec_minmax,
 700                 .extra1         = SYSCTL_ZERO,
 701                 .extra2         = SYSCTL_ONE,
 702         },
 703 #endif
 704         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 705                 .procname       = "nf_conntrack_generic_timeout",
 706                 .maxlen         = sizeof(unsigned int),
 707                 .mode           = 0644,
 708                 .proc_handler   = proc_dointvec_jiffies,
 709         },
 710         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 711                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 712                 .maxlen         = sizeof(unsigned int),
 713                 .mode           = 0644,
 714                 .proc_handler   = proc_dointvec_jiffies,
 715         },
 716         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 717                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 718                 .maxlen         = sizeof(unsigned int),
 719                 .mode           = 0644,
 720                 .proc_handler   = proc_dointvec_jiffies,
 721         },
 722         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 723                 .procname       = "nf_conntrack_tcp_timeout_established",
 724                 .maxlen         = sizeof(unsigned int),
 725                 .mode           = 0644,
 726                 .proc_handler   = proc_dointvec_jiffies,
 727         },
 728         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 729                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 730                 .maxlen         = sizeof(unsigned int),
 731                 .mode           = 0644,
 732                 .proc_handler   = proc_dointvec_jiffies,
 733         },
 734         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 735                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 736                 .maxlen         = sizeof(unsigned int),
 737                 .mode           = 0644,
 738                 .proc_handler   = proc_dointvec_jiffies,
 739         },
 740         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 741                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 742                 .maxlen         = sizeof(unsigned int),
 743                 .mode           = 0644,
 744                 .proc_handler   = proc_dointvec_jiffies,
 745         },
 746         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 747                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 748                 .maxlen         = sizeof(unsigned int),
 749                 .mode           = 0644,
 750                 .proc_handler   = proc_dointvec_jiffies,
 751         },
 752         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 753                 .procname       = "nf_conntrack_tcp_timeout_close",
 754                 .maxlen         = sizeof(unsigned int),
 755                 .mode           = 0644,
 756                 .proc_handler   = proc_dointvec_jiffies,
 757         },
 758         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 759                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 760                 .maxlen         = sizeof(unsigned int),
 761                 .mode           = 0644,
 762                 .proc_handler   = proc_dointvec_jiffies,
 763         },
 764         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 765                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 766                 .maxlen         = sizeof(unsigned int),
 767                 .mode           = 0644,
 768                 .proc_handler   = proc_dointvec_jiffies,
 769         },
 770 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 771         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
 772                 .procname       = "nf_flowtable_tcp_timeout",
 773                 .maxlen         = sizeof(unsigned int),
 774                 .mode           = 0644,
 775                 .proc_handler   = proc_dointvec_jiffies,
 776         },
 777 #endif
 778         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 779                 .procname       = "nf_conntrack_tcp_loose",
 780                 .maxlen         = sizeof(u8),
 781                 .mode           = 0644,
 782                 .proc_handler   = proc_dou8vec_minmax,
 783                 .extra1         = SYSCTL_ZERO,
 784                 .extra2         = SYSCTL_ONE,
 785         },
 786         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 787                 .procname       = "nf_conntrack_tcp_be_liberal",
 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_IGNORE_INVALID_RST] = {
 795                 .procname       = "nf_conntrack_tcp_ignore_invalid_rst",
 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_MAX_RETRANS] = {
 803                 .procname       = "nf_conntrack_tcp_max_retrans",
 804                 .maxlen         = sizeof(u8),
 805                 .mode           = 0644,
 806                 .proc_handler   = proc_dou8vec_minmax,
 807         },
 808         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 809                 .procname       = "nf_conntrack_udp_timeout",
 810                 .maxlen         = sizeof(unsigned int),
 811                 .mode           = 0644,
 812                 .proc_handler   = proc_dointvec_jiffies,
 813         },
 814         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 815                 .procname       = "nf_conntrack_udp_timeout_stream",
 816                 .maxlen         = sizeof(unsigned int),
 817                 .mode           = 0644,
 818                 .proc_handler   = proc_dointvec_jiffies,
 819         },
 820 #if IS_ENABLED(CONFIG_NFT_FLOW_OFFLOAD)
 821         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
 822                 .procname       = "nf_flowtable_udp_timeout",
 823                 .maxlen         = sizeof(unsigned int),
 824                 .mode           = 0644,
 825                 .proc_handler   = proc_dointvec_jiffies,
 826         },
 827 #endif
 828         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 829                 .procname       = "nf_conntrack_icmp_timeout",
 830                 .maxlen         = sizeof(unsigned int),
 831                 .mode           = 0644,
 832                 .proc_handler   = proc_dointvec_jiffies,
 833         },
 834         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 835                 .procname       = "nf_conntrack_icmpv6_timeout",
 836                 .maxlen         = sizeof(unsigned int),
 837                 .mode           = 0644,
 838                 .proc_handler   = proc_dointvec_jiffies,
 839         },
 840 #ifdef CONFIG_NF_CT_PROTO_SCTP
 841         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 842                 .procname       = "nf_conntrack_sctp_timeout_closed",
 843                 .maxlen         = sizeof(unsigned int),
 844                 .mode           = 0644,
 845                 .proc_handler   = proc_dointvec_jiffies,
 846         },
 847         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 848                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 849                 .maxlen         = sizeof(unsigned int),
 850                 .mode           = 0644,
 851                 .proc_handler   = proc_dointvec_jiffies,
 852         },
 853         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 854                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 855                 .maxlen         = sizeof(unsigned int),
 856                 .mode           = 0644,
 857                 .proc_handler   = proc_dointvec_jiffies,
 858         },
 859         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 860                 .procname       = "nf_conntrack_sctp_timeout_established",
 861                 .maxlen         = sizeof(unsigned int),
 862                 .mode           = 0644,
 863                 .proc_handler   = proc_dointvec_jiffies,
 864         },
 865         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 866                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 867                 .maxlen         = sizeof(unsigned int),
 868                 .mode           = 0644,
 869                 .proc_handler   = proc_dointvec_jiffies,
 870         },
 871         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 872                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 873                 .maxlen         = sizeof(unsigned int),
 874                 .mode           = 0644,
 875                 .proc_handler   = proc_dointvec_jiffies,
 876         },
 877         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 878                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 879                 .maxlen         = sizeof(unsigned int),
 880                 .mode           = 0644,
 881                 .proc_handler   = proc_dointvec_jiffies,
 882         },
 883         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 884                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 885                 .maxlen         = sizeof(unsigned int),
 886                 .mode           = 0644,
 887                 .proc_handler   = proc_dointvec_jiffies,
 888         },
 889         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
 890                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_acked",
 891                 .maxlen         = sizeof(unsigned int),
 892                 .mode           = 0644,
 893                 .proc_handler   = proc_dointvec_jiffies,
 894         },
 895 #endif
 896 #ifdef CONFIG_NF_CT_PROTO_DCCP
 897         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 898                 .procname       = "nf_conntrack_dccp_timeout_request",
 899                 .maxlen         = sizeof(unsigned int),
 900                 .mode           = 0644,
 901                 .proc_handler   = proc_dointvec_jiffies,
 902         },
 903         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 904                 .procname       = "nf_conntrack_dccp_timeout_respond",
 905                 .maxlen         = sizeof(unsigned int),
 906                 .mode           = 0644,
 907                 .proc_handler   = proc_dointvec_jiffies,
 908         },
 909         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 910                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 911                 .maxlen         = sizeof(unsigned int),
 912                 .mode           = 0644,
 913                 .proc_handler   = proc_dointvec_jiffies,
 914         },
 915         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 916                 .procname       = "nf_conntrack_dccp_timeout_open",
 917                 .maxlen         = sizeof(unsigned int),
 918                 .mode           = 0644,
 919                 .proc_handler   = proc_dointvec_jiffies,
 920         },
 921         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 922                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 923                 .maxlen         = sizeof(unsigned int),
 924                 .mode           = 0644,
 925                 .proc_handler   = proc_dointvec_jiffies,
 926         },
 927         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 928                 .procname       = "nf_conntrack_dccp_timeout_closing",
 929                 .maxlen         = sizeof(unsigned int),
 930                 .mode           = 0644,
 931                 .proc_handler   = proc_dointvec_jiffies,
 932         },
 933         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 934                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 935                 .maxlen         = sizeof(unsigned int),
 936                 .mode           = 0644,
 937                 .proc_handler   = proc_dointvec_jiffies,
 938         },
 939         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 940                 .procname       = "nf_conntrack_dccp_loose",
 941                 .maxlen         = sizeof(u8),
 942                 .mode           = 0644,
 943                 .proc_handler   = proc_dou8vec_minmax,
 944                 .extra1         = SYSCTL_ZERO,
 945                 .extra2         = SYSCTL_ONE,
 946         },
 947 #endif
 948 #ifdef CONFIG_NF_CT_PROTO_GRE
 949         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 950                 .procname       = "nf_conntrack_gre_timeout",
 951                 .maxlen         = sizeof(unsigned int),
 952                 .mode           = 0644,
 953                 .proc_handler   = proc_dointvec_jiffies,
 954         },
 955         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 956                 .procname       = "nf_conntrack_gre_timeout_stream",
 957                 .maxlen         = sizeof(unsigned int),
 958                 .mode           = 0644,
 959                 .proc_handler   = proc_dointvec_jiffies,
 960         },
 961 #endif
 962         {}
 963 };
 964
 965 static struct ctl_table nf_ct_netfilter_table[] = {
 966         {
 967                 .procname       = "nf_conntrack_max",
 968                 .data           = &nf_conntrack_max,
 969                 .maxlen         = sizeof(int),
 970                 .mode           = 0644,
 971                 .proc_handler   = proc_dointvec,
 972         },
 973         { }
 974 };
 975
 976 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 977                                                     struct ctl_table *table)
 978 {
 979         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 980
 981 #define XASSIGN(XNAME, tn) \
 982         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 983                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 984
 985         XASSIGN(SYN_SENT, tn);
 986         XASSIGN(SYN_RECV, tn);
 987         XASSIGN(ESTABLISHED, tn);
 988         XASSIGN(FIN_WAIT, tn);
 989         XASSIGN(CLOSE_WAIT, tn);
 990         XASSIGN(LAST_ACK, tn);
 991         XASSIGN(TIME_WAIT, tn);
 992         XASSIGN(CLOSE, tn);
 993         XASSIGN(RETRANS, tn);
 994         XASSIGN(UNACK, tn);
 995 #undef XASSIGN
 996 #define XASSIGN(XNAME, rval) \
 997         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
 998
 999         XASSIGN(LOOSE, &tn->tcp_loose);
1000         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
1001         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
1002         XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
1003 #undef XASSIGN
1004
1005 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1006         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1007 #endif
1008
1009 }
1010
1011 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1012                                                      struct ctl_table *table)
1013 {
1014 #ifdef CONFIG_NF_CT_PROTO_SCTP
1015         struct nf_sctp_net *sn = nf_sctp_pernet(net);
1016
1017 #define XASSIGN(XNAME, sn) \
1018         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1019                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1020
1021         XASSIGN(CLOSED, sn);
1022         XASSIGN(COOKIE_WAIT, sn);
1023         XASSIGN(COOKIE_ECHOED, sn);
1024         XASSIGN(ESTABLISHED, sn);
1025         XASSIGN(SHUTDOWN_SENT, sn);
1026         XASSIGN(SHUTDOWN_RECD, sn);
1027         XASSIGN(SHUTDOWN_ACK_SENT, sn);
1028         XASSIGN(HEARTBEAT_SENT, sn);
1029         XASSIGN(HEARTBEAT_ACKED, sn);
1030 #undef XASSIGN
1031 #endif
1032 }
1033
1034 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1035                                                      struct ctl_table *table)
1036 {
1037 #ifdef CONFIG_NF_CT_PROTO_DCCP
1038         struct nf_dccp_net *dn = nf_dccp_pernet(net);
1039
1040 #define XASSIGN(XNAME, dn) \
1041         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1042                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1043
1044         XASSIGN(REQUEST, dn);
1045         XASSIGN(RESPOND, dn);
1046         XASSIGN(PARTOPEN, dn);
1047         XASSIGN(OPEN, dn);
1048         XASSIGN(CLOSEREQ, dn);
1049         XASSIGN(CLOSING, dn);
1050         XASSIGN(TIMEWAIT, dn);
1051 #undef XASSIGN
1052
1053         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1054 #endif
1055 }
1056
1057 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1058                                                     struct ctl_table *table)
1059 {
1060 #ifdef CONFIG_NF_CT_PROTO_GRE
1061         struct nf_gre_net *gn = nf_gre_pernet(net);
1062
1063         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1064         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1065 #endif
1066 }
1067
1068 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1069 {
1070         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1071         struct nf_udp_net *un = nf_udp_pernet(net);
1072         struct ctl_table *table;
1073
1074         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1075
1076         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1077                         GFP_KERNEL);
1078         if (!table)
1079                 return -ENOMEM;
1080
1081         table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1082         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1083         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1084         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1085         table[NF_SYSCTL_CT_HELPER].data = &cnet->sysctl_auto_assign_helper;
1086 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1087         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1088 #endif
1089 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1090         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1091 #endif
1092         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1093         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1094         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1095         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1096         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1097 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1098         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1099 #endif
1100
1101         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1102         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1103         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1104         nf_conntrack_standalone_init_gre_sysctl(net, table);
1105
1106         /* Don't allow non-init_net ns to alter global sysctls */
1107         if (!net_eq(&init_net, net)) {
1108                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1109                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1110                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1111         }
1112
1113         cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1114         if (!cnet->sysctl_header)
1115                 goto out_unregister_netfilter;
1116
1117         return 0;
1118
1119 out_unregister_netfilter:
1120         kfree(table);
1121         return -ENOMEM;
1122 }
1123
1124 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1125 {
1126         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1127         struct ctl_table *table;
1128
1129         table = cnet->sysctl_header->ctl_table_arg;
1130         unregister_net_sysctl_table(cnet->sysctl_header);
1131         kfree(table);
1132 }
1133 #else
1134 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1135 {
1136         return 0;
1137 }
1138
1139 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1140 {
1141 }
1142 #endif /* CONFIG_SYSCTL */
1143
1144 static void nf_conntrack_fini_net(struct net *net)
1145 {
1146         if (enable_hooks)
1147                 nf_ct_netns_put(net, NFPROTO_INET);
1148
1149         nf_conntrack_standalone_fini_proc(net);
1150         nf_conntrack_standalone_fini_sysctl(net);
1151 }
1152
1153 static int nf_conntrack_pernet_init(struct net *net)
1154 {
1155         int ret;
1156
1157         net->ct.sysctl_checksum = 1;
1158
1159         ret = nf_conntrack_standalone_init_sysctl(net);
1160         if (ret < 0)
1161                 return ret;
1162
1163         ret = nf_conntrack_standalone_init_proc(net);
1164         if (ret < 0)
1165                 goto out_proc;
1166
1167         ret = nf_conntrack_init_net(net);
1168         if (ret < 0)
1169                 goto out_init_net;
1170
1171         if (enable_hooks) {
1172                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1173                 if (ret < 0)
1174                         goto out_hooks;
1175         }
1176
1177         return 0;
1178
1179 out_hooks:
1180         nf_conntrack_cleanup_net(net);
1181 out_init_net:
1182         nf_conntrack_standalone_fini_proc(net);
1183 out_proc:
1184         nf_conntrack_standalone_fini_sysctl(net);
1185         return ret;
1186 }
1187
1188 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1189 {
1190         struct net *net;
1191
1192         list_for_each_entry(net, net_exit_list, exit_list)
1193                 nf_conntrack_fini_net(net);
1194
1195         nf_conntrack_cleanup_net_list(net_exit_list);
1196 }
1197
1198 static struct pernet_operations nf_conntrack_net_ops = {
1199         .init           = nf_conntrack_pernet_init,
1200         .exit_batch     = nf_conntrack_pernet_exit,
1201         .id             = &nf_conntrack_net_id,
1202         .size = sizeof(struct nf_conntrack_net),
1203 };
1204
1205 static int __init nf_conntrack_standalone_init(void)
1206 {
1207         int ret = nf_conntrack_init_start();
1208         if (ret < 0)
1209                 goto out_start;
1210
1211         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1212
1213 #ifdef CONFIG_SYSCTL
1214         nf_ct_netfilter_header =
1215                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1216         if (!nf_ct_netfilter_header) {
1217                 pr_err("nf_conntrack: can't register to sysctl.\n");
1218                 ret = -ENOMEM;
1219                 goto out_sysctl;
1220         }
1221
1222         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1223 #endif
1224
1225         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1226         if (ret < 0)
1227                 goto out_pernet;
1228
1229         nf_conntrack_init_end();
1230         return 0;
1231
1232 out_pernet:
1233 #ifdef CONFIG_SYSCTL
1234         unregister_net_sysctl_table(nf_ct_netfilter_header);
1235 out_sysctl:
1236 #endif
1237         nf_conntrack_cleanup_end();
1238 out_start:
1239         return ret;
1240 }
1241
1242 static void __exit nf_conntrack_standalone_fini(void)
1243 {
1244         nf_conntrack_cleanup_start();
1245         unregister_pernet_subsys(&nf_conntrack_net_ops);
1246 #ifdef CONFIG_SYSCTL
1247         unregister_net_sysctl_table(nf_ct_netfilter_header);
1248 #endif
1249         nf_conntrack_cleanup_end();
1250 }
1251
1252 module_init(nf_conntrack_standalone_init);
1253 module_exit(nf_conntrack_standalone_fini);