net/netfilter/nf_conntrack_standalone.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3 #include <linux/netfilter.h>
   4 #include <linux/slab.h>
   5 #include <linux/module.h>
   6 #include <linux/skbuff.h>
   7 #include <linux/proc_fs.h>
   8 #include <linux/seq_file.h>
   9 #include <linux/percpu.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/security.h>
  12 #include <net/net_namespace.h>
  13 #ifdef CONFIG_SYSCTL
  14 #include <linux/sysctl.h>
  15 #endif
  16
  17 #include <net/netfilter/nf_conntrack.h>
  18 #include <net/netfilter/nf_conntrack_core.h>
  19 #include <net/netfilter/nf_conntrack_l4proto.h>
  20 #include <net/netfilter/nf_conntrack_expect.h>
  21 #include <net/netfilter/nf_conntrack_helper.h>
  22 #include <net/netfilter/nf_conntrack_acct.h>
  23 #include <net/netfilter/nf_conntrack_zones.h>
  24 #include <net/netfilter/nf_conntrack_timestamp.h>
  25 #ifdef CONFIG_LWTUNNEL
  26 #include <net/netfilter/nf_hooks_lwtunnel.h>
  27 #endif
  28 #include <linux/rculist_nulls.h>
  29
  30 static bool enable_hooks __read_mostly;
  31 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
  32 module_param(enable_hooks, bool, 0000);
  33
  34 unsigned int nf_conntrack_net_id __read_mostly;
  35
  36 #ifdef CONFIG_NF_CONNTRACK_PROCFS
  37 void
  38 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
  39             const struct nf_conntrack_l4proto *l4proto)
  40 {
  41         switch (tuple->src.l3num) {
  42         case NFPROTO_IPV4:
  43                 seq_printf(s, "src=%pI4 dst=%pI4 ",
  44                            &tuple->src.u3.ip, &tuple->dst.u3.ip);
  45                 break;
  46         case NFPROTO_IPV6:
  47                 seq_printf(s, "src=%pI6 dst=%pI6 ",
  48                            tuple->src.u3.ip6, tuple->dst.u3.ip6);
  49                 break;
  50         default:
  51                 break;
  52         }
  53
  54         switch (l4proto->l4proto) {
  55         case IPPROTO_ICMP:
  56                 seq_printf(s, "type=%u code=%u id=%u ",
  57                            tuple->dst.u.icmp.type,
  58                            tuple->dst.u.icmp.code,
  59                            ntohs(tuple->src.u.icmp.id));
  60                 break;
  61         case IPPROTO_TCP:
  62                 seq_printf(s, "sport=%hu dport=%hu ",
  63                            ntohs(tuple->src.u.tcp.port),
  64                            ntohs(tuple->dst.u.tcp.port));
  65                 break;
  66         case IPPROTO_UDPLITE:
  67         case IPPROTO_UDP:
  68                 seq_printf(s, "sport=%hu dport=%hu ",
  69                            ntohs(tuple->src.u.udp.port),
  70                            ntohs(tuple->dst.u.udp.port));
  71
  72                 break;
  73         case IPPROTO_DCCP:
  74                 seq_printf(s, "sport=%hu dport=%hu ",
  75                            ntohs(tuple->src.u.dccp.port),
  76                            ntohs(tuple->dst.u.dccp.port));
  77                 break;
  78         case IPPROTO_SCTP:
  79                 seq_printf(s, "sport=%hu dport=%hu ",
  80                            ntohs(tuple->src.u.sctp.port),
  81                            ntohs(tuple->dst.u.sctp.port));
  82                 break;
  83         case IPPROTO_ICMPV6:
  84                 seq_printf(s, "type=%u code=%u id=%u ",
  85                            tuple->dst.u.icmp.type,
  86                            tuple->dst.u.icmp.code,
  87                            ntohs(tuple->src.u.icmp.id));
  88                 break;
  89         case IPPROTO_GRE:
  90                 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
  91                            ntohs(tuple->src.u.gre.key),
  92                            ntohs(tuple->dst.u.gre.key));
  93                 break;
  94         default:
  95                 break;
  96         }
  97 }
  98 EXPORT_SYMBOL_GPL(print_tuple);
  99
 100 struct ct_iter_state {
 101         struct seq_net_private p;
 102         struct hlist_nulls_head *hash;
 103         unsigned int htable_size;
 104         unsigned int bucket;
 105         u_int64_t time_now;
 106 };
 107
 108 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
 109 {
 110         struct ct_iter_state *st = seq->private;
 111         struct hlist_nulls_node *n;
 112
 113         for (st->bucket = 0;
 114              st->bucket < st->htable_size;
 115              st->bucket++) {
 116                 n = rcu_dereference(
 117                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 118                 if (!is_a_nulls(n))
 119                         return n;
 120         }
 121         return NULL;
 122 }
 123
 124 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
 125                                       struct hlist_nulls_node *head)
 126 {
 127         struct ct_iter_state *st = seq->private;
 128
 129         head = rcu_dereference(hlist_nulls_next_rcu(head));
 130         while (is_a_nulls(head)) {
 131                 if (likely(get_nulls_value(head) == st->bucket)) {
 132                         if (++st->bucket >= st->htable_size)
 133                                 return NULL;
 134                 }
 135                 head = rcu_dereference(
 136                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 137         }
 138         return head;
 139 }
 140
 141 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
 142 {
 143         struct hlist_nulls_node *head = ct_get_first(seq);
 144
 145         if (head)
 146                 while (pos && (head = ct_get_next(seq, head)))
 147                         pos--;
 148         return pos ? NULL : head;
 149 }
 150
 151 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
 152         __acquires(RCU)
 153 {
 154         struct ct_iter_state *st = seq->private;
 155
 156         st->time_now = ktime_get_real_ns();
 157         rcu_read_lock();
 158
 159         nf_conntrack_get_ht(&st->hash, &st->htable_size);
 160         return ct_get_idx(seq, *pos);
 161 }
 162
 163 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
 164 {
 165         (*pos)++;
 166         return ct_get_next(s, v);
 167 }
 168
 169 static void ct_seq_stop(struct seq_file *s, void *v)
 170         __releases(RCU)
 171 {
 172         rcu_read_unlock();
 173 }
 174
 175 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 176 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 177 {
 178         int ret;
 179         u32 len;
 180         char *secctx;
 181
 182         ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
 183         if (ret)
 184                 return;
 185
 186         seq_printf(s, "secctx=%s ", secctx);
 187
 188         security_release_secctx(secctx, len);
 189 }
 190 #else
 191 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 192 {
 193 }
 194 #endif
 195
 196 #ifdef CONFIG_NF_CONNTRACK_ZONES
 197 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 198                          int dir)
 199 {
 200         const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
 201
 202         if (zone->dir != dir)
 203                 return;
 204         switch (zone->dir) {
 205         case NF_CT_DEFAULT_ZONE_DIR:
 206                 seq_printf(s, "zone=%u ", zone->id);
 207                 break;
 208         case NF_CT_ZONE_DIR_ORIG:
 209                 seq_printf(s, "zone-orig=%u ", zone->id);
 210                 break;
 211         case NF_CT_ZONE_DIR_REPL:
 212                 seq_printf(s, "zone-reply=%u ", zone->id);
 213                 break;
 214         default:
 215                 break;
 216         }
 217 }
 218 #else
 219 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 220                                 int dir)
 221 {
 222 }
 223 #endif
 224
 225 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 226 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 227 {
 228         struct ct_iter_state *st = s->private;
 229         struct nf_conn_tstamp *tstamp;
 230         s64 delta_time;
 231
 232         tstamp = nf_conn_tstamp_find(ct);
 233         if (tstamp) {
 234                 delta_time = st->time_now - tstamp->start;
 235                 if (delta_time > 0)
 236                         delta_time = div_s64(delta_time, NSEC_PER_SEC);
 237                 else
 238                         delta_time = 0;
 239
 240                 seq_printf(s, "delta-time=%llu ",
 241                            (unsigned long long)delta_time);
 242         }
 243         return;
 244 }
 245 #else
 246 static inline void
 247 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 248 {
 249 }
 250 #endif
 251
 252 static const char* l3proto_name(u16 proto)
 253 {
 254         switch (proto) {
 255         case AF_INET: return "ipv4";
 256         case AF_INET6: return "ipv6";
 257         }
 258
 259         return "unknown";
 260 }
 261
 262 static const char* l4proto_name(u16 proto)
 263 {
 264         switch (proto) {
 265         case IPPROTO_ICMP: return "icmp";
 266         case IPPROTO_TCP: return "tcp";
 267         case IPPROTO_UDP: return "udp";
 268         case IPPROTO_DCCP: return "dccp";
 269         case IPPROTO_GRE: return "gre";
 270         case IPPROTO_SCTP: return "sctp";
 271         case IPPROTO_UDPLITE: return "udplite";
 272         case IPPROTO_ICMPV6: return "icmpv6";
 273         }
 274
 275         return "unknown";
 276 }
 277
 278 static void
 279 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 280 {
 281         struct nf_conn_acct *acct;
 282         struct nf_conn_counter *counter;
 283
 284         acct = nf_conn_acct_find(ct);
 285         if (!acct)
 286                 return;
 287
 288         counter = acct->counter;
 289         seq_printf(s, "packets=%llu bytes=%llu ",
 290                    (unsigned long long)atomic64_read(&counter[dir].packets),
 291                    (unsigned long long)atomic64_read(&counter[dir].bytes));
 292 }
 293
 294 /* return 0 on success, 1 in case of error */
 295 static int ct_seq_show(struct seq_file *s, void *v)
 296 {
 297         struct nf_conntrack_tuple_hash *hash = v;
 298         struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
 299         const struct nf_conntrack_l4proto *l4proto;
 300         struct net *net = seq_file_net(s);
 301         int ret = 0;
 302
 303         WARN_ON(!ct);
 304         if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
 305                 return 0;
 306
 307         /* load ->status after refcount increase */
 308         smp_acquire__after_ctrl_dep();
 309
 310         if (nf_ct_should_gc(ct)) {
 311                 nf_ct_kill(ct);
 312                 goto release;
 313         }
 314
 315         /* we only want to print DIR_ORIGINAL */
 316         if (NF_CT_DIRECTION(hash))
 317                 goto release;
 318
 319         if (!net_eq(nf_ct_net(ct), net))
 320                 goto release;
 321
 322         l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 323
 324         ret = -ENOSPC;
 325         seq_printf(s, "%-8s %u %-8s %u ",
 326                    l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
 327                    l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
 328
 329         if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
 330                 seq_printf(s, "%ld ", nf_ct_expires(ct)  / HZ);
 331
 332         if (l4proto->print_conntrack)
 333                 l4proto->print_conntrack(s, ct);
 334
 335         print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
 336                     l4proto);
 337
 338         ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
 339
 340         if (seq_has_overflowed(s))
 341                 goto release;
 342
 343         seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL);
 344
 345         if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
 346                 seq_puts(s, "[UNREPLIED] ");
 347
 348         print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
 349
 350         ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
 351
 352         seq_print_acct(s, ct, IP_CT_DIR_REPLY);
 353
 354         if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
 355                 seq_puts(s, "[HW_OFFLOAD] ");
 356         else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
 357                 seq_puts(s, "[OFFLOAD] ");
 358         else if (test_bit(IPS_ASSURED_BIT, &ct->status))
 359                 seq_puts(s, "[ASSURED] ");
 360
 361         if (seq_has_overflowed(s))
 362                 goto release;
 363
 364 #if defined(CONFIG_NF_CONNTRACK_MARK)
 365         seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
 366 #endif
 367
 368         ct_show_secctx(s, ct);
 369         ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
 370         ct_show_delta_time(s, ct);
 371
 372         seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
 373
 374         if (seq_has_overflowed(s))
 375                 goto release;
 376
 377         ret = 0;
 378 release:
 379         nf_ct_put(ct);
 380         return ret;
 381 }
 382
 383 static const struct seq_operations ct_seq_ops = {
 384         .start = ct_seq_start,
 385         .next  = ct_seq_next,
 386         .stop  = ct_seq_stop,
 387         .show  = ct_seq_show
 388 };
 389
 390 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 391 {
 392         struct net *net = seq_file_net(seq);
 393         int cpu;
 394
 395         if (*pos == 0)
 396                 return SEQ_START_TOKEN;
 397
 398         for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
 399                 if (!cpu_possible(cpu))
 400                         continue;
 401                 *pos = cpu + 1;
 402                 return per_cpu_ptr(net->ct.stat, cpu);
 403         }
 404
 405         return NULL;
 406 }
 407
 408 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 409 {
 410         struct net *net = seq_file_net(seq);
 411         int cpu;
 412
 413         for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
 414                 if (!cpu_possible(cpu))
 415                         continue;
 416                 *pos = cpu + 1;
 417                 return per_cpu_ptr(net->ct.stat, cpu);
 418         }
 419         (*pos)++;
 420         return NULL;
 421 }
 422
 423 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 424 {
 425 }
 426
 427 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 428 {
 429         struct net *net = seq_file_net(seq);
 430         const struct ip_conntrack_stat *st = v;
 431         unsigned int nr_conntracks;
 432
 433         if (v == SEQ_START_TOKEN) {
 434                 seq_puts(seq, "entries  clashres found new invalid ignore delete chainlength insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete search_restart\n");
 435                 return 0;
 436         }
 437
 438         nr_conntracks = nf_conntrack_count(net);
 439
 440         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
 441                         "%08x %08x %08x %08x %08x  %08x %08x %08x %08x\n",
 442                    nr_conntracks,
 443                    st->clash_resolve,
 444                    st->found,
 445                    0,
 446                    st->invalid,
 447                    0,
 448                    0,
 449                    st->chaintoolong,
 450                    st->insert,
 451                    st->insert_failed,
 452                    st->drop,
 453                    st->early_drop,
 454                    st->error,
 455
 456                    st->expect_new,
 457                    st->expect_create,
 458                    st->expect_delete,
 459                    st->search_restart
 460                 );
 461         return 0;
 462 }
 463
 464 static const struct seq_operations ct_cpu_seq_ops = {
 465         .start  = ct_cpu_seq_start,
 466         .next   = ct_cpu_seq_next,
 467         .stop   = ct_cpu_seq_stop,
 468         .show   = ct_cpu_seq_show,
 469 };
 470
 471 static int nf_conntrack_standalone_init_proc(struct net *net)
 472 {
 473         struct proc_dir_entry *pde;
 474         kuid_t root_uid;
 475         kgid_t root_gid;
 476
 477         pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
 478                         sizeof(struct ct_iter_state));
 479         if (!pde)
 480                 goto out_nf_conntrack;
 481
 482         root_uid = make_kuid(net->user_ns, 0);
 483         root_gid = make_kgid(net->user_ns, 0);
 484         if (uid_valid(root_uid) && gid_valid(root_gid))
 485                 proc_set_user(pde, root_uid, root_gid);
 486
 487         pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
 488                         &ct_cpu_seq_ops, sizeof(struct seq_net_private));
 489         if (!pde)
 490                 goto out_stat_nf_conntrack;
 491         return 0;
 492
 493 out_stat_nf_conntrack:
 494         remove_proc_entry("nf_conntrack", net->proc_net);
 495 out_nf_conntrack:
 496         return -ENOMEM;
 497 }
 498
 499 static void nf_conntrack_standalone_fini_proc(struct net *net)
 500 {
 501         remove_proc_entry("nf_conntrack", net->proc_net_stat);
 502         remove_proc_entry("nf_conntrack", net->proc_net);
 503 }
 504 #else
 505 static int nf_conntrack_standalone_init_proc(struct net *net)
 506 {
 507         return 0;
 508 }
 509
 510 static void nf_conntrack_standalone_fini_proc(struct net *net)
 511 {
 512 }
 513 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
 514
 515 u32 nf_conntrack_count(const struct net *net)
 516 {
 517         const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
 518
 519         return atomic_read(&cnet->count);
 520 }
 521 EXPORT_SYMBOL_GPL(nf_conntrack_count);
 522
 523 /* Sysctl support */
 524
 525 #ifdef CONFIG_SYSCTL
 526 /* size the user *wants to set */
 527 static unsigned int nf_conntrack_htable_size_user __read_mostly;
 528
 529 static int
 530 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
 531                          void *buffer, size_t *lenp, loff_t *ppos)
 532 {
 533         int ret;
 534
 535         /* module_param hashsize could have changed value */
 536         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 537
 538         ret = proc_dointvec(table, write, buffer, lenp, ppos);
 539         if (ret < 0 || !write)
 540                 return ret;
 541
 542         /* update ret, we might not be able to satisfy request */
 543         ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
 544
 545         /* update it to the actual value used by conntrack */
 546         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 547         return ret;
 548 }
 549
 550 static struct ctl_table_header *nf_ct_netfilter_header;
 551
 552 enum nf_ct_sysctl_index {
 553         NF_SYSCTL_CT_MAX,
 554         NF_SYSCTL_CT_COUNT,
 555         NF_SYSCTL_CT_BUCKETS,
 556         NF_SYSCTL_CT_CHECKSUM,
 557         NF_SYSCTL_CT_LOG_INVALID,
 558         NF_SYSCTL_CT_EXPECT_MAX,
 559         NF_SYSCTL_CT_ACCT,
 560 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 561         NF_SYSCTL_CT_EVENTS,
 562 #endif
 563 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 564         NF_SYSCTL_CT_TIMESTAMP,
 565 #endif
 566         NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
 567         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
 568         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
 569         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
 570         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
 571         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
 572         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
 573         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
 574         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
 575         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
 576         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
 577 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 578         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
 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 #endif
 589         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 590         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 591 #ifdef CONFIG_NF_CT_PROTO_SCTP
 592         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 593         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 594         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 595         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 596         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 597         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 598         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 599         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 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 #ifdef CONFIG_LWTUNNEL
 616         NF_SYSCTL_CT_LWTUNNEL,
 617 #endif
 618
 619         NF_SYSCTL_CT_LAST_SYSCTL,
 620 };
 621
 622 static struct ctl_table nf_ct_sysctl_table[] = {
 623         [NF_SYSCTL_CT_MAX] = {
 624                 .procname       = "nf_conntrack_max",
 625                 .data           = &nf_conntrack_max,
 626                 .maxlen         = sizeof(int),
 627                 .mode           = 0644,
 628                 .proc_handler   = proc_dointvec,
 629         },
 630         [NF_SYSCTL_CT_COUNT] = {
 631                 .procname       = "nf_conntrack_count",
 632                 .maxlen         = sizeof(int),
 633                 .mode           = 0444,
 634                 .proc_handler   = proc_dointvec,
 635         },
 636         [NF_SYSCTL_CT_BUCKETS] = {
 637                 .procname       = "nf_conntrack_buckets",
 638                 .data           = &nf_conntrack_htable_size_user,
 639                 .maxlen         = sizeof(unsigned int),
 640                 .mode           = 0644,
 641                 .proc_handler   = nf_conntrack_hash_sysctl,
 642         },
 643         [NF_SYSCTL_CT_CHECKSUM] = {
 644                 .procname       = "nf_conntrack_checksum",
 645                 .data           = &init_net.ct.sysctl_checksum,
 646                 .maxlen         = sizeof(u8),
 647                 .mode           = 0644,
 648                 .proc_handler   = proc_dou8vec_minmax,
 649                 .extra1         = SYSCTL_ZERO,
 650                 .extra2         = SYSCTL_ONE,
 651         },
 652         [NF_SYSCTL_CT_LOG_INVALID] = {
 653                 .procname       = "nf_conntrack_log_invalid",
 654                 .data           = &init_net.ct.sysctl_log_invalid,
 655                 .maxlen         = sizeof(u8),
 656                 .mode           = 0644,
 657                 .proc_handler   = proc_dou8vec_minmax,
 658         },
 659         [NF_SYSCTL_CT_EXPECT_MAX] = {
 660                 .procname       = "nf_conntrack_expect_max",
 661                 .data           = &nf_ct_expect_max,
 662                 .maxlen         = sizeof(int),
 663                 .mode           = 0644,
 664                 .proc_handler   = proc_dointvec,
 665         },
 666         [NF_SYSCTL_CT_ACCT] = {
 667                 .procname       = "nf_conntrack_acct",
 668                 .data           = &init_net.ct.sysctl_acct,
 669                 .maxlen         = sizeof(u8),
 670                 .mode           = 0644,
 671                 .proc_handler   = proc_dou8vec_minmax,
 672                 .extra1         = SYSCTL_ZERO,
 673                 .extra2         = SYSCTL_ONE,
 674         },
 675 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 676         [NF_SYSCTL_CT_EVENTS] = {
 677                 .procname       = "nf_conntrack_events",
 678                 .data           = &init_net.ct.sysctl_events,
 679                 .maxlen         = sizeof(u8),
 680                 .mode           = 0644,
 681                 .proc_handler   = proc_dou8vec_minmax,
 682                 .extra1         = SYSCTL_ZERO,
 683                 .extra2         = SYSCTL_TWO,
 684         },
 685 #endif
 686 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 687         [NF_SYSCTL_CT_TIMESTAMP] = {
 688                 .procname       = "nf_conntrack_timestamp",
 689                 .data           = &init_net.ct.sysctl_tstamp,
 690                 .maxlen         = sizeof(u8),
 691                 .mode           = 0644,
 692                 .proc_handler   = proc_dou8vec_minmax,
 693                 .extra1         = SYSCTL_ZERO,
 694                 .extra2         = SYSCTL_ONE,
 695         },
 696 #endif
 697         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 698                 .procname       = "nf_conntrack_generic_timeout",
 699                 .maxlen         = sizeof(unsigned int),
 700                 .mode           = 0644,
 701                 .proc_handler   = proc_dointvec_jiffies,
 702         },
 703         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 704                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 705                 .maxlen         = sizeof(unsigned int),
 706                 .mode           = 0644,
 707                 .proc_handler   = proc_dointvec_jiffies,
 708         },
 709         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 710                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 711                 .maxlen         = sizeof(unsigned int),
 712                 .mode           = 0644,
 713                 .proc_handler   = proc_dointvec_jiffies,
 714         },
 715         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 716                 .procname       = "nf_conntrack_tcp_timeout_established",
 717                 .maxlen         = sizeof(unsigned int),
 718                 .mode           = 0644,
 719                 .proc_handler   = proc_dointvec_jiffies,
 720         },
 721         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 722                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 723                 .maxlen         = sizeof(unsigned int),
 724                 .mode           = 0644,
 725                 .proc_handler   = proc_dointvec_jiffies,
 726         },
 727         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 728                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 729                 .maxlen         = sizeof(unsigned int),
 730                 .mode           = 0644,
 731                 .proc_handler   = proc_dointvec_jiffies,
 732         },
 733         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 734                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 735                 .maxlen         = sizeof(unsigned int),
 736                 .mode           = 0644,
 737                 .proc_handler   = proc_dointvec_jiffies,
 738         },
 739         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 740                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 741                 .maxlen         = sizeof(unsigned int),
 742                 .mode           = 0644,
 743                 .proc_handler   = proc_dointvec_jiffies,
 744         },
 745         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 746                 .procname       = "nf_conntrack_tcp_timeout_close",
 747                 .maxlen         = sizeof(unsigned int),
 748                 .mode           = 0644,
 749                 .proc_handler   = proc_dointvec_jiffies,
 750         },
 751         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 752                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 753                 .maxlen         = sizeof(unsigned int),
 754                 .mode           = 0644,
 755                 .proc_handler   = proc_dointvec_jiffies,
 756         },
 757         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 758                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 759                 .maxlen         = sizeof(unsigned int),
 760                 .mode           = 0644,
 761                 .proc_handler   = proc_dointvec_jiffies,
 762         },
 763 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 764         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
 765                 .procname       = "nf_flowtable_tcp_timeout",
 766                 .maxlen         = sizeof(unsigned int),
 767                 .mode           = 0644,
 768                 .proc_handler   = proc_dointvec_jiffies,
 769         },
 770 #endif
 771         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 772                 .procname       = "nf_conntrack_tcp_loose",
 773                 .maxlen         = sizeof(u8),
 774                 .mode           = 0644,
 775                 .proc_handler   = proc_dou8vec_minmax,
 776                 .extra1         = SYSCTL_ZERO,
 777                 .extra2         = SYSCTL_ONE,
 778         },
 779         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 780                 .procname       = "nf_conntrack_tcp_be_liberal",
 781                 .maxlen         = sizeof(u8),
 782                 .mode           = 0644,
 783                 .proc_handler   = proc_dou8vec_minmax,
 784                 .extra1         = SYSCTL_ZERO,
 785                 .extra2         = SYSCTL_ONE,
 786         },
 787         [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
 788                 .procname       = "nf_conntrack_tcp_ignore_invalid_rst",
 789                 .maxlen         = sizeof(u8),
 790                 .mode           = 0644,
 791                 .proc_handler   = proc_dou8vec_minmax,
 792                 .extra1         = SYSCTL_ZERO,
 793                 .extra2         = SYSCTL_ONE,
 794         },
 795         [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
 796                 .procname       = "nf_conntrack_tcp_max_retrans",
 797                 .maxlen         = sizeof(u8),
 798                 .mode           = 0644,
 799                 .proc_handler   = proc_dou8vec_minmax,
 800         },
 801         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 802                 .procname       = "nf_conntrack_udp_timeout",
 803                 .maxlen         = sizeof(unsigned int),
 804                 .mode           = 0644,
 805                 .proc_handler   = proc_dointvec_jiffies,
 806         },
 807         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 808                 .procname       = "nf_conntrack_udp_timeout_stream",
 809                 .maxlen         = sizeof(unsigned int),
 810                 .mode           = 0644,
 811                 .proc_handler   = proc_dointvec_jiffies,
 812         },
 813 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
 814         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
 815                 .procname       = "nf_flowtable_udp_timeout",
 816                 .maxlen         = sizeof(unsigned int),
 817                 .mode           = 0644,
 818                 .proc_handler   = proc_dointvec_jiffies,
 819         },
 820 #endif
 821         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 822                 .procname       = "nf_conntrack_icmp_timeout",
 823                 .maxlen         = sizeof(unsigned int),
 824                 .mode           = 0644,
 825                 .proc_handler   = proc_dointvec_jiffies,
 826         },
 827         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 828                 .procname       = "nf_conntrack_icmpv6_timeout",
 829                 .maxlen         = sizeof(unsigned int),
 830                 .mode           = 0644,
 831                 .proc_handler   = proc_dointvec_jiffies,
 832         },
 833 #ifdef CONFIG_NF_CT_PROTO_SCTP
 834         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 835                 .procname       = "nf_conntrack_sctp_timeout_closed",
 836                 .maxlen         = sizeof(unsigned int),
 837                 .mode           = 0644,
 838                 .proc_handler   = proc_dointvec_jiffies,
 839         },
 840         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 841                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 842                 .maxlen         = sizeof(unsigned int),
 843                 .mode           = 0644,
 844                 .proc_handler   = proc_dointvec_jiffies,
 845         },
 846         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 847                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 848                 .maxlen         = sizeof(unsigned int),
 849                 .mode           = 0644,
 850                 .proc_handler   = proc_dointvec_jiffies,
 851         },
 852         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 853                 .procname       = "nf_conntrack_sctp_timeout_established",
 854                 .maxlen         = sizeof(unsigned int),
 855                 .mode           = 0644,
 856                 .proc_handler   = proc_dointvec_jiffies,
 857         },
 858         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 859                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 860                 .maxlen         = sizeof(unsigned int),
 861                 .mode           = 0644,
 862                 .proc_handler   = proc_dointvec_jiffies,
 863         },
 864         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 865                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 866                 .maxlen         = sizeof(unsigned int),
 867                 .mode           = 0644,
 868                 .proc_handler   = proc_dointvec_jiffies,
 869         },
 870         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 871                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 872                 .maxlen         = sizeof(unsigned int),
 873                 .mode           = 0644,
 874                 .proc_handler   = proc_dointvec_jiffies,
 875         },
 876         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 877                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 878                 .maxlen         = sizeof(unsigned int),
 879                 .mode           = 0644,
 880                 .proc_handler   = proc_dointvec_jiffies,
 881         },
 882 #endif
 883 #ifdef CONFIG_NF_CT_PROTO_DCCP
 884         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 885                 .procname       = "nf_conntrack_dccp_timeout_request",
 886                 .maxlen         = sizeof(unsigned int),
 887                 .mode           = 0644,
 888                 .proc_handler   = proc_dointvec_jiffies,
 889         },
 890         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 891                 .procname       = "nf_conntrack_dccp_timeout_respond",
 892                 .maxlen         = sizeof(unsigned int),
 893                 .mode           = 0644,
 894                 .proc_handler   = proc_dointvec_jiffies,
 895         },
 896         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 897                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 898                 .maxlen         = sizeof(unsigned int),
 899                 .mode           = 0644,
 900                 .proc_handler   = proc_dointvec_jiffies,
 901         },
 902         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 903                 .procname       = "nf_conntrack_dccp_timeout_open",
 904                 .maxlen         = sizeof(unsigned int),
 905                 .mode           = 0644,
 906                 .proc_handler   = proc_dointvec_jiffies,
 907         },
 908         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 909                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 910                 .maxlen         = sizeof(unsigned int),
 911                 .mode           = 0644,
 912                 .proc_handler   = proc_dointvec_jiffies,
 913         },
 914         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 915                 .procname       = "nf_conntrack_dccp_timeout_closing",
 916                 .maxlen         = sizeof(unsigned int),
 917                 .mode           = 0644,
 918                 .proc_handler   = proc_dointvec_jiffies,
 919         },
 920         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 921                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 922                 .maxlen         = sizeof(unsigned int),
 923                 .mode           = 0644,
 924                 .proc_handler   = proc_dointvec_jiffies,
 925         },
 926         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 927                 .procname       = "nf_conntrack_dccp_loose",
 928                 .maxlen         = sizeof(u8),
 929                 .mode           = 0644,
 930                 .proc_handler   = proc_dou8vec_minmax,
 931                 .extra1         = SYSCTL_ZERO,
 932                 .extra2         = SYSCTL_ONE,
 933         },
 934 #endif
 935 #ifdef CONFIG_NF_CT_PROTO_GRE
 936         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 937                 .procname       = "nf_conntrack_gre_timeout",
 938                 .maxlen         = sizeof(unsigned int),
 939                 .mode           = 0644,
 940                 .proc_handler   = proc_dointvec_jiffies,
 941         },
 942         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 943                 .procname       = "nf_conntrack_gre_timeout_stream",
 944                 .maxlen         = sizeof(unsigned int),
 945                 .mode           = 0644,
 946                 .proc_handler   = proc_dointvec_jiffies,
 947         },
 948 #endif
 949 #ifdef CONFIG_LWTUNNEL
 950         [NF_SYSCTL_CT_LWTUNNEL] = {
 951                 .procname       = "nf_hooks_lwtunnel",
 952                 .data           = NULL,
 953                 .maxlen         = sizeof(int),
 954                 .mode           = 0644,
 955                 .proc_handler   = nf_hooks_lwtunnel_sysctl_handler,
 956         },
 957 #endif
 958 };
 959
 960 static struct ctl_table nf_ct_netfilter_table[] = {
 961         {
 962                 .procname       = "nf_conntrack_max",
 963                 .data           = &nf_conntrack_max,
 964                 .maxlen         = sizeof(int),
 965                 .mode           = 0644,
 966                 .proc_handler   = proc_dointvec,
 967         },
 968 };
 969
 970 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 971                                                     struct ctl_table *table)
 972 {
 973         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 974
 975 #define XASSIGN(XNAME, tn) \
 976         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 977                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 978
 979         XASSIGN(SYN_SENT, tn);
 980         XASSIGN(SYN_RECV, tn);
 981         XASSIGN(ESTABLISHED, tn);
 982         XASSIGN(FIN_WAIT, tn);
 983         XASSIGN(CLOSE_WAIT, tn);
 984         XASSIGN(LAST_ACK, tn);
 985         XASSIGN(TIME_WAIT, tn);
 986         XASSIGN(CLOSE, tn);
 987         XASSIGN(RETRANS, tn);
 988         XASSIGN(UNACK, tn);
 989 #undef XASSIGN
 990 #define XASSIGN(XNAME, rval) \
 991         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
 992
 993         XASSIGN(LOOSE, &tn->tcp_loose);
 994         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
 995         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
 996         XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
 997 #undef XASSIGN
 998
 999 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1000         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1001 #endif
1002
1003 }
1004
1005 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1006                                                      struct ctl_table *table)
1007 {
1008 #ifdef CONFIG_NF_CT_PROTO_SCTP
1009         struct nf_sctp_net *sn = nf_sctp_pernet(net);
1010
1011 #define XASSIGN(XNAME, sn) \
1012         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1013                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1014
1015         XASSIGN(CLOSED, sn);
1016         XASSIGN(COOKIE_WAIT, sn);
1017         XASSIGN(COOKIE_ECHOED, sn);
1018         XASSIGN(ESTABLISHED, sn);
1019         XASSIGN(SHUTDOWN_SENT, sn);
1020         XASSIGN(SHUTDOWN_RECD, sn);
1021         XASSIGN(SHUTDOWN_ACK_SENT, sn);
1022         XASSIGN(HEARTBEAT_SENT, sn);
1023 #undef XASSIGN
1024 #endif
1025 }
1026
1027 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1028                                                      struct ctl_table *table)
1029 {
1030 #ifdef CONFIG_NF_CT_PROTO_DCCP
1031         struct nf_dccp_net *dn = nf_dccp_pernet(net);
1032
1033 #define XASSIGN(XNAME, dn) \
1034         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1035                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1036
1037         XASSIGN(REQUEST, dn);
1038         XASSIGN(RESPOND, dn);
1039         XASSIGN(PARTOPEN, dn);
1040         XASSIGN(OPEN, dn);
1041         XASSIGN(CLOSEREQ, dn);
1042         XASSIGN(CLOSING, dn);
1043         XASSIGN(TIMEWAIT, dn);
1044 #undef XASSIGN
1045
1046         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1047 #endif
1048 }
1049
1050 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1051                                                     struct ctl_table *table)
1052 {
1053 #ifdef CONFIG_NF_CT_PROTO_GRE
1054         struct nf_gre_net *gn = nf_gre_pernet(net);
1055
1056         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1057         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1058 #endif
1059 }
1060
1061 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1062 {
1063         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1064         struct nf_udp_net *un = nf_udp_pernet(net);
1065         struct ctl_table *table;
1066
1067         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1068
1069         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1070                         GFP_KERNEL);
1071         if (!table)
1072                 return -ENOMEM;
1073
1074         table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1075         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1076         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1077         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1078 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1079         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1080 #endif
1081 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1082         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1083 #endif
1084         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1085         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1086         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1087         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1088         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1089 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1090         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1091 #endif
1092
1093         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1094         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1095         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1096         nf_conntrack_standalone_init_gre_sysctl(net, table);
1097
1098         /* Don't allow non-init_net ns to alter global sysctls */
1099         if (!net_eq(&init_net, net)) {
1100                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1101                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1102                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1103         }
1104
1105         cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1106                                                      table,
1107                                                      ARRAY_SIZE(nf_ct_sysctl_table));
1108         if (!cnet->sysctl_header)
1109                 goto out_unregister_netfilter;
1110
1111         return 0;
1112
1113 out_unregister_netfilter:
1114         kfree(table);
1115         return -ENOMEM;
1116 }
1117
1118 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1119 {
1120         struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1121         const struct ctl_table *table;
1122
1123         table = cnet->sysctl_header->ctl_table_arg;
1124         unregister_net_sysctl_table(cnet->sysctl_header);
1125         kfree(table);
1126 }
1127 #else
1128 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1129 {
1130         return 0;
1131 }
1132
1133 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1134 {
1135 }
1136 #endif /* CONFIG_SYSCTL */
1137
1138 static void nf_conntrack_fini_net(struct net *net)
1139 {
1140         if (enable_hooks)
1141                 nf_ct_netns_put(net, NFPROTO_INET);
1142
1143         nf_conntrack_standalone_fini_proc(net);
1144         nf_conntrack_standalone_fini_sysctl(net);
1145 }
1146
1147 static int nf_conntrack_pernet_init(struct net *net)
1148 {
1149         int ret;
1150
1151         net->ct.sysctl_checksum = 1;
1152
1153         ret = nf_conntrack_standalone_init_sysctl(net);
1154         if (ret < 0)
1155                 return ret;
1156
1157         ret = nf_conntrack_standalone_init_proc(net);
1158         if (ret < 0)
1159                 goto out_proc;
1160
1161         ret = nf_conntrack_init_net(net);
1162         if (ret < 0)
1163                 goto out_init_net;
1164
1165         if (enable_hooks) {
1166                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1167                 if (ret < 0)
1168                         goto out_hooks;
1169         }
1170
1171         return 0;
1172
1173 out_hooks:
1174         nf_conntrack_cleanup_net(net);
1175 out_init_net:
1176         nf_conntrack_standalone_fini_proc(net);
1177 out_proc:
1178         nf_conntrack_standalone_fini_sysctl(net);
1179         return ret;
1180 }
1181
1182 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1183 {
1184         struct net *net;
1185
1186         list_for_each_entry(net, net_exit_list, exit_list)
1187                 nf_conntrack_fini_net(net);
1188
1189         nf_conntrack_cleanup_net_list(net_exit_list);
1190 }
1191
1192 static struct pernet_operations nf_conntrack_net_ops = {
1193         .init           = nf_conntrack_pernet_init,
1194         .exit_batch     = nf_conntrack_pernet_exit,
1195         .id             = &nf_conntrack_net_id,
1196         .size = sizeof(struct nf_conntrack_net),
1197 };
1198
1199 static int __init nf_conntrack_standalone_init(void)
1200 {
1201         int ret = nf_conntrack_init_start();
1202         if (ret < 0)
1203                 goto out_start;
1204
1205         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1206
1207 #ifdef CONFIG_SYSCTL
1208         nf_ct_netfilter_header =
1209                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1210         if (!nf_ct_netfilter_header) {
1211                 pr_err("nf_conntrack: can't register to sysctl.\n");
1212                 ret = -ENOMEM;
1213                 goto out_sysctl;
1214         }
1215
1216         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1217 #endif
1218
1219         nf_conntrack_init_end();
1220
1221         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1222         if (ret < 0)
1223                 goto out_pernet;
1224
1225         return 0;
1226
1227 out_pernet:
1228 #ifdef CONFIG_SYSCTL
1229         unregister_net_sysctl_table(nf_ct_netfilter_header);
1230 out_sysctl:
1231 #endif
1232         nf_conntrack_cleanup_end();
1233 out_start:
1234         return ret;
1235 }
1236
1237 static void __exit nf_conntrack_standalone_fini(void)
1238 {
1239         nf_conntrack_cleanup_start();
1240         unregister_pernet_subsys(&nf_conntrack_net_ops);
1241 #ifdef CONFIG_SYSCTL
1242         unregister_net_sysctl_table(nf_ct_netfilter_header);
1243 #endif
1244         nf_conntrack_cleanup_end();
1245 }
1246
1247 module_init(nf_conntrack_standalone_init);
1248 module_exit(nf_conntrack_standalone_fini);