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