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tcp: Namespace-ify sysctl_tcp_limit_output_bytes
[mirror_ubuntu-jammy-kernel.git] / net / ipv4 / sysctl_net_ipv4.c
CommitLineData
1da177e4
LT		 1/*
2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
3 *
1da177e4
LT		 4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
6 */
7
8#include <linux/mm.h>
9#include <linux/module.h>
10#include <linux/sysctl.h>
20380731 11#include <linux/igmp.h>
14c85021 12#include <linux/inetdevice.h>
227b60f5 13#include <linux/seqlock.h>
3e37c3f9 14#include <linux/init.h>
5a0e3ad6 15#include <linux/slab.h>
c319b4d7 16#include <linux/nsproxy.h>
3dc43e3e 17#include <linux/swap.h>
1da177e4 18#include <net/snmp.h>
20380731 19#include <net/icmp.h>
1da177e4
LT		 20#include <net/ip.h>
21#include <net/route.h>
22#include <net/tcp.h>
95766fff 23#include <net/udp.h>
446fda4f 24#include <net/cipso_ipv4.h>
04128f23 25#include <net/inet_frag.h>
c319b4d7 26#include <net/ping.h>
dddb64bc 27#include <net/protocol.h>
1da177e4 28
89cee8b1 29static int zero;
cdda8891 30static int one = 1;
6ba8a3b1 31static int four = 4;
43e122b0 32static int thousand = 1000;
95bd09eb 33static int gso_max_segs = GSO_MAX_SEGS;
e905a9ed 34static int tcp_retr1_max = 255;
1da177e4
LT		 35static int ip_local_port_range_min[] = { 1, 1 };
36static int ip_local_port_range_max[] = { 65535, 65535 };
0147fc05
AD		 37static int tcp_adv_win_scale_min = -31;
38static int tcp_adv_win_scale_max = 31;
4548b683
KJ		 39static int ip_privileged_port_min;
40static int ip_privileged_port_max = 65535;
249fab77
ED		 41static int ip_ttl_min = 1;
42static int ip_ttl_max = 255;
651e9271
MT		 43static int tcp_syn_retries_min = 1;
44static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
c319b4d7
VK		 45static int ip_ping_group_range_min[] = { 0, 0 };
46static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
1da177e4 47
b6690b14
FW		 48/* obsolete */
49static int sysctl_tcp_low_latency __read_mostly;
50
227b60f5 51/* Update system visible IP port range */
0bbf87d8 52static void set_local_port_range(struct net *net, int range[2])
227b60f5 53{
ed2dfd90
ED		 54 bool same_parity = !((range[0] ^ range[1]) & 1);
55
4ee3bd4a 56 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
ed2dfd90
ED		 57 if (same_parity && !net->ipv4.ip_local_ports.warned) {
58 net->ipv4.ip_local_ports.warned = true;
59 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
60 }
c9d8f1a6
CW		 61 net->ipv4.ip_local_ports.range[0] = range[0];
62 net->ipv4.ip_local_ports.range[1] = range[1];
4ee3bd4a 63 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
227b60f5
SH		 64}
65
66/* Validate changes from /proc interface. */
fe2c6338 67static int ipv4_local_port_range(struct ctl_table *table, int write,
227b60f5
SH		 68 void __user *buffer,
69 size_t *lenp, loff_t *ppos)
70{
0bbf87d8 71 struct net *net =
c9d8f1a6 72 container_of(table->data, struct net, ipv4.ip_local_ports.range);
227b60f5 73 int ret;
3c689b73 74 int range[2];
fe2c6338 75 struct ctl_table tmp = {
227b60f5
SH		 76 .data = &range,
77 .maxlen = sizeof(range),
78 .mode = table->mode,
79 .extra1 = &ip_local_port_range_min,
80 .extra2 = &ip_local_port_range_max,
81 };
82
0bbf87d8
EB		 83 inet_get_local_port_range(net, &range[0], &range[1]);
84
8d65af78 85 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
227b60f5
SH		 86
87 if (write && ret == 0) {
4548b683
KJ		 88 /* Ensure that the upper limit is not smaller than the lower,
89 * and that the lower does not encroach upon the privileged
90 * port limit.
91 */
92 if ((range[1] < range[0]) ||
93 (range[0] < net->ipv4.sysctl_ip_prot_sock))
227b60f5
SH		 94 ret = -EINVAL;
95 else
0bbf87d8 96 set_local_port_range(net, range);
227b60f5
SH		 97 }
98
99 return ret;
100}
101
4548b683
KJ		 102/* Validate changes from /proc interface. */
103static int ipv4_privileged_ports(struct ctl_table *table, int write,
104 void __user *buffer, size_t *lenp, loff_t *ppos)
105{
106 struct net *net = container_of(table->data, struct net,
107 ipv4.sysctl_ip_prot_sock);
108 int ret;
109 int pports;
110 int range[2];
111 struct ctl_table tmp = {
112 .data = &pports,
113 .maxlen = sizeof(pports),
114 .mode = table->mode,
115 .extra1 = &ip_privileged_port_min,
116 .extra2 = &ip_privileged_port_max,
117 };
118
119 pports = net->ipv4.sysctl_ip_prot_sock;
120
121 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
122
123 if (write && ret == 0) {
124 inet_get_local_port_range(net, &range[0], &range[1]);
125 /* Ensure that the local port range doesn't overlap with the
126 * privileged port range.
127 */
128 if (range[0] < pports)
129 ret = -EINVAL;
130 else
131 net->ipv4.sysctl_ip_prot_sock = pports;
132 }
133
134 return ret;
135}
c319b4d7 136
7064d16e 137static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
c319b4d7 138{
7064d16e 139 kgid_t *data = table->data;
0bbf87d8 140 struct net *net =
ba6b918a 141 container_of(table->data, struct net, ipv4.ping_group_range.range);
95c96174 142 unsigned int seq;
c319b4d7 143 do {
396a30cc 144 seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 145
146 *low = data[0];
147 *high = data[1];
396a30cc 148 } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
c319b4d7
VK		 149}
150
151/* Update system visible IP port range */
7064d16e 152static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
c319b4d7 153{
7064d16e 154 kgid_t *data = table->data;
0bbf87d8 155 struct net *net =
ba6b918a 156 container_of(table->data, struct net, ipv4.ping_group_range.range);
396a30cc 157 write_seqlock(&net->ipv4.ping_group_range.lock);
7064d16e
EB		 158 data[0] = low;
159 data[1] = high;
396a30cc 160 write_sequnlock(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 161}
162
163/* Validate changes from /proc interface. */
fe2c6338 164static int ipv4_ping_group_range(struct ctl_table *table, int write,
c319b4d7
VK		 165 void __user *buffer,
166 size_t *lenp, loff_t *ppos)
167{
7064d16e 168 struct user_namespace *user_ns = current_user_ns();
c319b4d7 169 int ret;
7064d16e
EB		 170 gid_t urange[2];
171 kgid_t low, high;
fe2c6338 172 struct ctl_table tmp = {
7064d16e
EB		 173 .data = &urange,
174 .maxlen = sizeof(urange),
c319b4d7
VK		 175 .mode = table->mode,
176 .extra1 = &ip_ping_group_range_min,
177 .extra2 = &ip_ping_group_range_max,
178 };
179
7064d16e
EB		 180 inet_get_ping_group_range_table(table, &low, &high);
181 urange[0] = from_kgid_munged(user_ns, low);
182 urange[1] = from_kgid_munged(user_ns, high);
c319b4d7
VK		 183 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
184
7064d16e
EB		 185 if (write && ret == 0) {
186 low = make_kgid(user_ns, urange[0]);
187 high = make_kgid(user_ns, urange[1]);
188 if (!gid_valid(low) || !gid_valid(high) ||
189 (urange[1] < urange[0]) || gid_lt(high, low)) {
190 low = make_kgid(&init_user_ns, 1);
191 high = make_kgid(&init_user_ns, 0);
192 }
193 set_ping_group_range(table, low, high);
194 }
c319b4d7
VK		 195
196 return ret;
197}
198
fe2c6338 199static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
317a76f9
SH		 200 void __user *buffer, size_t *lenp, loff_t *ppos)
201{
202 char val[TCP_CA_NAME_MAX];
fe2c6338 203 struct ctl_table tbl = {
317a76f9
SH		 204 .data = val,
205 .maxlen = TCP_CA_NAME_MAX,
206 };
207 int ret;
208
209 tcp_get_default_congestion_control(val);
210
8d65af78 211 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
317a76f9
SH		 212 if (write && ret == 0)
213 ret = tcp_set_default_congestion_control(val);
214 return ret;
215}
216
fe2c6338 217static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
8d65af78 218 int write,
3ff825b2
SH		 219 void __user *buffer, size_t *lenp,
220 loff_t *ppos)
221{
fe2c6338 222 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
3ff825b2
SH		 223 int ret;
224
225 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
226 if (!tbl.data)
227 return -ENOMEM;
228 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
8d65af78 229 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
3ff825b2
SH		 230 kfree(tbl.data);
231 return ret;
232}
233
fe2c6338 234static int proc_allowed_congestion_control(struct ctl_table *ctl,
8d65af78 235 int write,
ce7bc3bf
SH		 236 void __user *buffer, size_t *lenp,
237 loff_t *ppos)
238{
fe2c6338 239 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
ce7bc3bf
SH		 240 int ret;
241
242 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
243 if (!tbl.data)
244 return -ENOMEM;
245
246 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
8d65af78 247 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ce7bc3bf
SH		 248 if (write && ret == 0)
249 ret = tcp_set_allowed_congestion_control(tbl.data);
250 kfree(tbl.data);
251 return ret;
252}
253
43713848 254static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
fe2c6338
JP		 255 void __user *buffer, size_t *lenp,
256 loff_t *ppos)
10467163 257{
43713848
HY		 258 struct net *net = container_of(table->data, struct net,
259 ipv4.sysctl_tcp_fastopen);
fe2c6338 260 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
10467163
JC		 261 struct tcp_fastopen_context *ctxt;
262 int ret;
263 u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
264
265 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
266 if (!tbl.data)
267 return -ENOMEM;
268
269 rcu_read_lock();
43713848 270 ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx);
10467163
JC		 271 if (ctxt)
272 memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
0e24c4fc
AC		 273 else
274 memset(user_key, 0, sizeof(user_key));
10467163
JC		 275 rcu_read_unlock();
276
277 snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
278 user_key[0], user_key[1], user_key[2], user_key[3]);
279 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
280
281 if (write && ret == 0) {
282 if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
283 user_key + 2, user_key + 3) != 4) {
284 ret = -EINVAL;
285 goto bad_key;
286 }
1fba70e5
YC		 287 tcp_fastopen_reset_cipher(net, NULL, user_key,
288 TCP_FASTOPEN_KEY_LENGTH);
10467163
JC		 289 }
290
291bad_key:
292 pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
293 user_key[0], user_key[1], user_key[2], user_key[3],
294 (char *)tbl.data, ret);
295 kfree(tbl.data);
296 return ret;
297}
298
dddb64bc
SAK		 299static void proc_configure_early_demux(int enabled, int protocol)
300{
301 struct net_protocol *ipprot;
302#if IS_ENABLED(CONFIG_IPV6)
303 struct inet6_protocol *ip6prot;
304#endif
305
58c4c6a3
DA		 306 rcu_read_lock();
307
dddb64bc
SAK		 308 ipprot = rcu_dereference(inet_protos[protocol]);
309 if (ipprot)
310 ipprot->early_demux = enabled ? ipprot->early_demux_handler :
311 NULL;
312
313#if IS_ENABLED(CONFIG_IPV6)
314 ip6prot = rcu_dereference(inet6_protos[protocol]);
315 if (ip6prot)
316 ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
317 NULL;
318#endif
58c4c6a3 319 rcu_read_unlock();
dddb64bc
SAK		 320}
321
322static int proc_tcp_early_demux(struct ctl_table *table, int write,
323 void __user *buffer, size_t *lenp, loff_t *ppos)
324{
325 int ret = 0;
326
327 ret = proc_dointvec(table, write, buffer, lenp, ppos);
328
329 if (write && !ret) {
330 int enabled = init_net.ipv4.sysctl_tcp_early_demux;
331
332 proc_configure_early_demux(enabled, IPPROTO_TCP);
333 }
334
335 return ret;
336}
337
338static int proc_udp_early_demux(struct ctl_table *table, int write,
339 void __user *buffer, size_t *lenp, loff_t *ppos)
340{
341 int ret = 0;
342
343 ret = proc_dointvec(table, write, buffer, lenp, ppos);
344
345 if (write && !ret) {
346 int enabled = init_net.ipv4.sysctl_udp_early_demux;
347
348 proc_configure_early_demux(enabled, IPPROTO_UDP);
349 }
350
351 return ret;
352}
353
cf1ef3f0
WW		 354static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table,
355 int write,
356 void __user *buffer,
357 size_t *lenp, loff_t *ppos)
358{
3733be14
HY		 359 struct net *net = container_of(table->data, struct net,
360 ipv4.sysctl_tcp_fastopen_blackhole_timeout);
cf1ef3f0
WW		 361 int ret;
362
363 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
364 if (write && ret == 0)
3733be14 365 atomic_set(&net->ipv4.tfo_active_disable_times, 0);
734942cc
DW		 366
367 return ret;
368}
369
370static int proc_tcp_available_ulp(struct ctl_table *ctl,
371 int write,
372 void __user *buffer, size_t *lenp,
373 loff_t *ppos)
374{
375 struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
376 int ret;
377
378 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
379 if (!tbl.data)
380 return -ENOMEM;
381 tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
382 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
383 kfree(tbl.data);
384
cf1ef3f0
WW		 385 return ret;
386}
387
3e37c3f9 388static struct ctl_table ipv4_table[] = {
1da177e4 389 {
1da177e4
LT		 390 .procname = "tcp_max_orphans",
391 .data = &sysctl_tcp_max_orphans,
392 .maxlen = sizeof(int),
393 .mode = 0644,
6d9f239a 394 .proc_handler = proc_dointvec
1da177e4 395 },
1da177e4 396 {
1da177e4
LT		 397 .procname = "inet_peer_threshold",
398 .data = &inet_peer_threshold,
399 .maxlen = sizeof(int),
400 .mode = 0644,
6d9f239a 401 .proc_handler = proc_dointvec
1da177e4
LT		 402 },
403 {
1da177e4
LT		 404 .procname = "inet_peer_minttl",
405 .data = &inet_peer_minttl,
406 .maxlen = sizeof(int),
407 .mode = 0644,
6d9f239a 408 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 409 },
410 {
1da177e4
LT		 411 .procname = "inet_peer_maxttl",
412 .data = &inet_peer_maxttl,
413 .maxlen = sizeof(int),
414 .mode = 0644,
6d9f239a 415 .proc_handler = proc_dointvec_jiffies,
1da177e4 416 },
a4fe34bf
EB		 417 {
418 .procname = "tcp_mem",
419 .maxlen = sizeof(sysctl_tcp_mem),
420 .data = &sysctl_tcp_mem,
421 .mode = 0644,
422 .proc_handler = proc_doulongvec_minmax,
423 },
1da177e4 424 {
1da177e4
LT		 425 .procname = "tcp_wmem",
426 .data = &sysctl_tcp_wmem,
427 .maxlen = sizeof(sysctl_tcp_wmem),
428 .mode = 0644,
cdda8891 429 .proc_handler = proc_dointvec_minmax,
5d37852b 430 .extra1 = &one,
1da177e4
LT		 431 },
432 {
1da177e4
LT		 433 .procname = "tcp_rmem",
434 .data = &sysctl_tcp_rmem,
435 .maxlen = sizeof(sysctl_tcp_rmem),
436 .mode = 0644,
cdda8891 437 .proc_handler = proc_dointvec_minmax,
5d37852b 438 .extra1 = &one,
1da177e4 439 },
f6722583
YC		 440 {
441 .procname = "tcp_min_rtt_wlen",
442 .data = &sysctl_tcp_min_rtt_wlen,
443 .maxlen = sizeof(int),
1da177e4 444 .mode = 0644,
6d9f239a 445 .proc_handler = proc_dointvec
1da177e4
LT		 446 },
447 {
1da177e4
LT		 448 .procname = "tcp_low_latency",
449 .data = &sysctl_tcp_low_latency,
450 .maxlen = sizeof(int),
451 .mode = 0644,
6d9f239a 452 .proc_handler = proc_dointvec
1da177e4 453 },
1da177e4 454 {
317a76f9 455 .procname = "tcp_congestion_control",
1da177e4 456 .mode = 0644,
317a76f9 457 .maxlen = TCP_CA_NAME_MAX,
6d9f239a 458 .proc_handler = proc_tcp_congestion_control,
1da177e4 459 },
282f23c6
ED		 460 {
461 .procname = "tcp_challenge_ack_limit",
462 .data = &sysctl_tcp_challenge_ack_limit,
463 .maxlen = sizeof(int),
464 .mode = 0644,
465 .proc_handler = proc_dointvec
466 },
446fda4f
PM		 467#ifdef CONFIG_NETLABEL
468 {
446fda4f
PM		 469 .procname = "cipso_cache_enable",
470 .data = &cipso_v4_cache_enabled,
471 .maxlen = sizeof(int),
472 .mode = 0644,
6d9f239a 473 .proc_handler = proc_dointvec,
446fda4f
PM		 474 },
475 {
446fda4f
PM		 476 .procname = "cipso_cache_bucket_size",
477 .data = &cipso_v4_cache_bucketsize,
478 .maxlen = sizeof(int),
479 .mode = 0644,
6d9f239a 480 .proc_handler = proc_dointvec,
446fda4f
PM		 481 },
482 {
446fda4f
PM		 483 .procname = "cipso_rbm_optfmt",
484 .data = &cipso_v4_rbm_optfmt,
485 .maxlen = sizeof(int),
486 .mode = 0644,
6d9f239a 487 .proc_handler = proc_dointvec,
446fda4f
PM		 488 },
489 {
446fda4f
PM		 490 .procname = "cipso_rbm_strictvalid",
491 .data = &cipso_v4_rbm_strictvalid,
492 .maxlen = sizeof(int),
493 .mode = 0644,
6d9f239a 494 .proc_handler = proc_dointvec,
446fda4f
PM		 495 },
496#endif /* CONFIG_NETLABEL */
3ff825b2 497 {
3ff825b2
SH		 498 .procname = "tcp_available_congestion_control",
499 .maxlen = TCP_CA_BUF_MAX,
500 .mode = 0444,
6d9f239a 501 .proc_handler = proc_tcp_available_congestion_control,
3ff825b2 502 },
ce7bc3bf 503 {
ce7bc3bf
SH		 504 .procname = "tcp_allowed_congestion_control",
505 .maxlen = TCP_CA_BUF_MAX,
506 .mode = 0644,
6d9f239a 507 .proc_handler = proc_allowed_congestion_control,
ce7bc3bf 508 },
95bd09eb
ED		 509 {
510 .procname = "tcp_min_tso_segs",
511 .data = &sysctl_tcp_min_tso_segs,
512 .maxlen = sizeof(int),
513 .mode = 0644,
514 .proc_handler = proc_dointvec_minmax,
d6a4e26a 515 .extra1 = &one,
95bd09eb
ED		 516 .extra2 = &gso_max_segs,
517 },
43e122b0
ED		 518 {
519 .procname = "tcp_pacing_ss_ratio",
520 .data = &sysctl_tcp_pacing_ss_ratio,
521 .maxlen = sizeof(int),
522 .mode = 0644,
523 .proc_handler = proc_dointvec_minmax,
524 .extra1 = &zero,
525 .extra2 = &thousand,
526 },
527 {
528 .procname = "tcp_pacing_ca_ratio",
529 .data = &sysctl_tcp_pacing_ca_ratio,
530 .maxlen = sizeof(int),
531 .mode = 0644,
532 .proc_handler = proc_dointvec_minmax,
533 .extra1 = &zero,
534 .extra2 = &thousand,
535 },
f54b3111
ED		 536 {
537 .procname = "tcp_autocorking",
538 .data = &sysctl_tcp_autocorking,
539 .maxlen = sizeof(int),
540 .mode = 0644,
541 .proc_handler = proc_dointvec_minmax,
542 .extra1 = &zero,
543 .extra2 = &one,
544 },
032ee423
NC		 545 {
546 .procname = "tcp_invalid_ratelimit",
547 .data = &sysctl_tcp_invalid_ratelimit,
548 .maxlen = sizeof(int),
549 .mode = 0644,
550 .proc_handler = proc_dointvec_ms_jiffies,
551 },
734942cc
DW		 552 {
553 .procname = "tcp_available_ulp",
554 .maxlen = TCP_ULP_BUF_MAX,
555 .mode = 0444,
556 .proc_handler = proc_tcp_available_ulp,
557 },
4cdf507d
ED		 558 {
559 .procname = "icmp_msgs_per_sec",
560 .data = &sysctl_icmp_msgs_per_sec,
561 .maxlen = sizeof(int),
562 .mode = 0644,
563 .proc_handler = proc_dointvec_minmax,
564 .extra1 = &zero,
565 },
566 {
567 .procname = "icmp_msgs_burst",
568 .data = &sysctl_icmp_msgs_burst,
569 .maxlen = sizeof(int),
570 .mode = 0644,
571 .proc_handler = proc_dointvec_minmax,
572 .extra1 = &zero,
573 },
95766fff 574 {
95766fff
HA		 575 .procname = "udp_mem",
576 .data = &sysctl_udp_mem,
577 .maxlen = sizeof(sysctl_udp_mem),
578 .mode = 0644,
8d987e5c 579 .proc_handler = proc_doulongvec_minmax,
95766fff
HA		 580 },
581 {
95766fff
HA		 582 .procname = "udp_rmem_min",
583 .data = &sysctl_udp_rmem_min,
584 .maxlen = sizeof(sysctl_udp_rmem_min),
585 .mode = 0644,
6d9f239a 586 .proc_handler = proc_dointvec_minmax,
5d37852b 587 .extra1 = &one
95766fff
HA		 588 },
589 {
95766fff
HA		 590 .procname = "udp_wmem_min",
591 .data = &sysctl_udp_wmem_min,
592 .maxlen = sizeof(sysctl_udp_wmem_min),
593 .mode = 0644,
6d9f239a 594 .proc_handler = proc_dointvec_minmax,
5d37852b 595 .extra1 = &one
95766fff 596 },
f8572d8f 597 { }
1da177e4 598};
3e37c3f9 599
68528f09
PE		 600static struct ctl_table ipv4_net_table[] = {
601 {
68528f09
PE		 602 .procname = "icmp_echo_ignore_all",
603 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
604 .maxlen = sizeof(int),
605 .mode = 0644,
6d9f239a 606 .proc_handler = proc_dointvec
68528f09
PE		 607 },
608 {
68528f09
PE		 609 .procname = "icmp_echo_ignore_broadcasts",
610 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
611 .maxlen = sizeof(int),
612 .mode = 0644,
6d9f239a 613 .proc_handler = proc_dointvec
68528f09
PE		 614 },
615 {
68528f09
PE		 616 .procname = "icmp_ignore_bogus_error_responses",
617 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
618 .maxlen = sizeof(int),
619 .mode = 0644,
6d9f239a 620 .proc_handler = proc_dointvec
68528f09
PE		 621 },
622 {
68528f09
PE		 623 .procname = "icmp_errors_use_inbound_ifaddr",
624 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
625 .maxlen = sizeof(int),
626 .mode = 0644,
6d9f239a 627 .proc_handler = proc_dointvec
68528f09
PE		 628 },
629 {
68528f09
PE		 630 .procname = "icmp_ratelimit",
631 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
632 .maxlen = sizeof(int),
633 .mode = 0644,
6d9f239a 634 .proc_handler = proc_dointvec_ms_jiffies,
68528f09
PE		 635 },
636 {
68528f09
PE		 637 .procname = "icmp_ratemask",
638 .data = &init_net.ipv4.sysctl_icmp_ratemask,
639 .maxlen = sizeof(int),
640 .mode = 0644,
6d9f239a 641 .proc_handler = proc_dointvec
68528f09 642 },
c319b4d7
VK		 643 {
644 .procname = "ping_group_range",
ba6b918a 645 .data = &init_net.ipv4.ping_group_range.range,
7064d16e 646 .maxlen = sizeof(gid_t)*2,
c319b4d7
VK		 647 .mode = 0644,
648 .proc_handler = ipv4_ping_group_range,
649 },
5d134f1c
HFS		 650 {
651 .procname = "tcp_ecn",
652 .data = &init_net.ipv4.sysctl_tcp_ecn,
653 .maxlen = sizeof(int),
654 .mode = 0644,
655 .proc_handler = proc_dointvec
656 },
49213555
DB		 657 {
658 .procname = "tcp_ecn_fallback",
659 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
660 .maxlen = sizeof(int),
661 .mode = 0644,
662 .proc_handler = proc_dointvec
663 },
287b7f38
NB		 664 {
665 .procname = "ip_dynaddr",
666 .data = &init_net.ipv4.sysctl_ip_dynaddr,
667 .maxlen = sizeof(int),
668 .mode = 0644,
669 .proc_handler = proc_dointvec
670 },
e21145a9
NB		 671 {
672 .procname = "ip_early_demux",
673 .data = &init_net.ipv4.sysctl_ip_early_demux,
674 .maxlen = sizeof(int),
675 .mode = 0644,
676 .proc_handler = proc_dointvec
677 },
dddb64bc
SAK		 678 {
679 .procname = "udp_early_demux",
680 .data = &init_net.ipv4.sysctl_udp_early_demux,
681 .maxlen = sizeof(int),
682 .mode = 0644,
683 .proc_handler = proc_udp_early_demux
684 },
685 {
686 .procname = "tcp_early_demux",
687 .data = &init_net.ipv4.sysctl_tcp_early_demux,
688 .maxlen = sizeof(int),
689 .mode = 0644,
690 .proc_handler = proc_tcp_early_demux
691 },
fa50d974
NB		 692 {
693 .procname = "ip_default_ttl",
694 .data = &init_net.ipv4.sysctl_ip_default_ttl,
695 .maxlen = sizeof(int),
696 .mode = 0644,
697 .proc_handler = proc_dointvec_minmax,
698 .extra1 = &ip_ttl_min,
699 .extra2 = &ip_ttl_max,
700 },
0bbf87d8
EB		 701 {
702 .procname = "ip_local_port_range",
c9d8f1a6
CW		 703 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
704 .data = &init_net.ipv4.ip_local_ports.range,
0bbf87d8
EB		 705 .mode = 0644,
706 .proc_handler = ipv4_local_port_range,
707 },
122ff243
WC		 708 {
709 .procname = "ip_local_reserved_ports",
710 .data = &init_net.ipv4.sysctl_local_reserved_ports,
711 .maxlen = 65536,
712 .mode = 0644,
713 .proc_handler = proc_do_large_bitmap,
714 },
974eda11
HFS		 715 {
716 .procname = "ip_no_pmtu_disc",
717 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
718 .maxlen = sizeof(int),
719 .mode = 0644,
720 .proc_handler = proc_dointvec
721 },
f87c10a8
HFS		 722 {
723 .procname = "ip_forward_use_pmtu",
724 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
725 .maxlen = sizeof(int),
726 .mode = 0644,
727 .proc_handler = proc_dointvec,
728 },
49a60158
VB		 729 {
730 .procname = "ip_nonlocal_bind",
731 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
732 .maxlen = sizeof(int),
733 .mode = 0644,
734 .proc_handler = proc_dointvec
735 },
e110861f
LC		 736 {
737 .procname = "fwmark_reflect",
738 .data = &init_net.ipv4.sysctl_fwmark_reflect,
739 .maxlen = sizeof(int),
740 .mode = 0644,
741 .proc_handler = proc_dointvec,
742 },
84f39b08
LC		 743 {
744 .procname = "tcp_fwmark_accept",
745 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
746 .maxlen = sizeof(int),
747 .mode = 0644,
748 .proc_handler = proc_dointvec,
749 },
6dd9a14e
DA		 750#ifdef CONFIG_NET_L3_MASTER_DEV
751 {
752 .procname = "tcp_l3mdev_accept",
753 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
754 .maxlen = sizeof(int),
755 .mode = 0644,
756 .proc_handler = proc_dointvec_minmax,
757 .extra1 = &zero,
758 .extra2 = &one,
759 },
760#endif
b0f9ca53
FD		 761 {
762 .procname = "tcp_mtu_probing",
763 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
764 .maxlen = sizeof(int),
765 .mode = 0644,
766 .proc_handler = proc_dointvec,
767 },
768 {
769 .procname = "tcp_base_mss",
770 .data = &init_net.ipv4.sysctl_tcp_base_mss,
771 .maxlen = sizeof(int),
772 .mode = 0644,
773 .proc_handler = proc_dointvec,
774 },
6b58e0a5
FD		 775 {
776 .procname = "tcp_probe_threshold",
777 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
778 .maxlen = sizeof(int),
779 .mode = 0644,
780 .proc_handler = proc_dointvec,
781 },
05cbc0db
FD		 782 {
783 .procname = "tcp_probe_interval",
784 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
785 .maxlen = sizeof(int),
786 .mode = 0644,
787 .proc_handler = proc_dointvec,
788 },
df2cf4a7
PD		 789 {
790 .procname = "igmp_link_local_mcast_reports",
87a8a2ae 791 .data = &init_net.ipv4.sysctl_igmp_llm_reports,
df2cf4a7
PD		 792 .maxlen = sizeof(int),
793 .mode = 0644,
794 .proc_handler = proc_dointvec
795 },
815c5270
NB		 796 {
797 .procname = "igmp_max_memberships",
798 .data = &init_net.ipv4.sysctl_igmp_max_memberships,
799 .maxlen = sizeof(int),
800 .mode = 0644,
801 .proc_handler = proc_dointvec
802 },
166b6b2d
NB		 803 {
804 .procname = "igmp_max_msf",
805 .data = &init_net.ipv4.sysctl_igmp_max_msf,
806 .maxlen = sizeof(int),
807 .mode = 0644,
808 .proc_handler = proc_dointvec
809 },
165094af
NB		 810#ifdef CONFIG_IP_MULTICAST
811 {
812 .procname = "igmp_qrv",
813 .data = &init_net.ipv4.sysctl_igmp_qrv,
814 .maxlen = sizeof(int),
815 .mode = 0644,
816 .proc_handler = proc_dointvec_minmax,
817 .extra1 = &one
818 },
819#endif
13b287e8
NB		 820 {
821 .procname = "tcp_keepalive_time",
822 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
823 .maxlen = sizeof(int),
824 .mode = 0644,
825 .proc_handler = proc_dointvec_jiffies,
826 },
9bd6861b
NB		 827 {
828 .procname = "tcp_keepalive_probes",
829 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
830 .maxlen = sizeof(int),
831 .mode = 0644,
832 .proc_handler = proc_dointvec
833 },
b840d15d
NB		 834 {
835 .procname = "tcp_keepalive_intvl",
836 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
837 .maxlen = sizeof(int),
838 .mode = 0644,
839 .proc_handler = proc_dointvec_jiffies,
840 },
6fa25166
NB		 841 {
842 .procname = "tcp_syn_retries",
843 .data = &init_net.ipv4.sysctl_tcp_syn_retries,
844 .maxlen = sizeof(int),
845 .mode = 0644,
846 .proc_handler = proc_dointvec_minmax,
847 .extra1 = &tcp_syn_retries_min,
848 .extra2 = &tcp_syn_retries_max
849 },
7c083ecb
NB		 850 {
851 .procname = "tcp_synack_retries",
852 .data = &init_net.ipv4.sysctl_tcp_synack_retries,
853 .maxlen = sizeof(int),
854 .mode = 0644,
855 .proc_handler = proc_dointvec
856 },
12ed8244
NB		 857#ifdef CONFIG_SYN_COOKIES
858 {
859 .procname = "tcp_syncookies",
860 .data = &init_net.ipv4.sysctl_tcp_syncookies,
861 .maxlen = sizeof(int),
862 .mode = 0644,
863 .proc_handler = proc_dointvec
864 },
865#endif
1043e25f
NB		 866 {
867 .procname = "tcp_reordering",
868 .data = &init_net.ipv4.sysctl_tcp_reordering,
869 .maxlen = sizeof(int),
870 .mode = 0644,
871 .proc_handler = proc_dointvec
872 },
ae5c3f40
NB		 873 {
874 .procname = "tcp_retries1",
875 .data = &init_net.ipv4.sysctl_tcp_retries1,
876 .maxlen = sizeof(int),
877 .mode = 0644,
878 .proc_handler = proc_dointvec_minmax,
879 .extra2 = &tcp_retr1_max
880 },
c6214a97
NB		 881 {
882 .procname = "tcp_retries2",
883 .data = &init_net.ipv4.sysctl_tcp_retries2,
884 .maxlen = sizeof(int),
885 .mode = 0644,
886 .proc_handler = proc_dointvec
887 },
c402d9be
NB		 888 {
889 .procname = "tcp_orphan_retries",
890 .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
891 .maxlen = sizeof(int),
892 .mode = 0644,
893 .proc_handler = proc_dointvec
894 },
1e579caa
NB		 895 {
896 .procname = "tcp_fin_timeout",
897 .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
898 .maxlen = sizeof(int),
899 .mode = 0644,
900 .proc_handler = proc_dointvec_jiffies,
901 },
4979f2d9
NB		 902 {
903 .procname = "tcp_notsent_lowat",
904 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
905 .maxlen = sizeof(unsigned int),
906 .mode = 0644,
b007f090 907 .proc_handler = proc_douintvec,
4979f2d9 908 },
56ab6b93
HY		 909 {
910 .procname = "tcp_tw_reuse",
911 .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
912 .maxlen = sizeof(int),
913 .mode = 0644,
914 .proc_handler = proc_dointvec
915 },
1946e672
HY		 916 {
917 .procname = "tcp_max_tw_buckets",
918 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
919 .maxlen = sizeof(int),
920 .mode = 0644,
921 .proc_handler = proc_dointvec
922 },
fee83d09
HY		 923 {
924 .procname = "tcp_max_syn_backlog",
925 .data = &init_net.ipv4.sysctl_max_syn_backlog,
926 .maxlen = sizeof(int),
927 .mode = 0644,
928 .proc_handler = proc_dointvec
929 },
e1cfcbe8
HY		 930 {
931 .procname = "tcp_fastopen",
932 .data = &init_net.ipv4.sysctl_tcp_fastopen,
933 .maxlen = sizeof(int),
934 .mode = 0644,
935 .proc_handler = proc_dointvec,
936 },
43713848
HY		 937 {
938 .procname = "tcp_fastopen_key",
939 .mode = 0600,
940 .data = &init_net.ipv4.sysctl_tcp_fastopen,
941 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
942 .proc_handler = proc_tcp_fastopen_key,
943 },
3733be14
HY		 944 {
945 .procname = "tcp_fastopen_blackhole_timeout_sec",
946 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
947 .maxlen = sizeof(int),
948 .mode = 0644,
949 .proc_handler = proc_tfo_blackhole_detect_timeout,
950 .extra1 = &zero,
951 },
a6db4494
DA		 952#ifdef CONFIG_IP_ROUTE_MULTIPATH
953 {
954 .procname = "fib_multipath_use_neigh",
955 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
956 .maxlen = sizeof(int),
957 .mode = 0644,
958 .proc_handler = proc_dointvec_minmax,
bf4e0a3d
NA		 959 .extra1 = &zero,
960 .extra2 = &one,
961 },
962 {
963 .procname = "fib_multipath_hash_policy",
964 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
965 .maxlen = sizeof(int),
966 .mode = 0644,
967 .proc_handler = proc_dointvec_minmax,
a6db4494
DA		 968 .extra1 = &zero,
969 .extra2 = &one,
970 },
971#endif
4548b683
KJ		 972 {
973 .procname = "ip_unprivileged_port_start",
974 .maxlen = sizeof(int),
975 .data = &init_net.ipv4.sysctl_ip_prot_sock,
976 .mode = 0644,
977 .proc_handler = ipv4_privileged_ports,
978 },
63a6fff3
RS		 979#ifdef CONFIG_NET_L3_MASTER_DEV
980 {
981 .procname = "udp_l3mdev_accept",
982 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
983 .maxlen = sizeof(int),
984 .mode = 0644,
985 .proc_handler = proc_dointvec_minmax,
986 .extra1 = &zero,
987 .extra2 = &one,
988 },
989#endif
f9301034
ED		 990 {
991 .procname = "tcp_sack",
992 .data = &init_net.ipv4.sysctl_tcp_sack,
993 .maxlen = sizeof(int),
994 .mode = 0644,
995 .proc_handler = proc_dointvec
996 },
9bb37ef0
ED		 997 {
998 .procname = "tcp_window_scaling",
999 .data = &init_net.ipv4.sysctl_tcp_window_scaling,
1000 .maxlen = sizeof(int),
1001 .mode = 0644,
1002 .proc_handler = proc_dointvec
1003 },
5d2ed052
ED		 1004 {
1005 .procname = "tcp_timestamps",
1006 .data = &init_net.ipv4.sysctl_tcp_timestamps,
1007 .maxlen = sizeof(int),
1008 .mode = 0644,
1009 .proc_handler = proc_dointvec
1010 },
2ae21cf5
ED		 1011 {
1012 .procname = "tcp_early_retrans",
1013 .data = &init_net.ipv4.sysctl_tcp_early_retrans,
1014 .maxlen = sizeof(int),
1015 .mode = 0644,
1016 .proc_handler = proc_dointvec_minmax,
1017 .extra1 = &zero,
1018 .extra2 = &four,
1019 },
e20223f1
ED		 1020 {
1021 .procname = "tcp_recovery",
1022 .data = &init_net.ipv4.sysctl_tcp_recovery,
1023 .maxlen = sizeof(int),
1024 .mode = 0644,
1025 .proc_handler = proc_dointvec,
1026 },
2c04ac8a
ED		 1027 {
1028 .procname = "tcp_thin_linear_timeouts",
1029 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
1030 .maxlen = sizeof(int),
1031 .mode = 0644,
1032 .proc_handler = proc_dointvec
1033 },
b510f0d2
ED		 1034 {
1035 .procname = "tcp_slow_start_after_idle",
1036 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
1037 .maxlen = sizeof(int),
1038 .mode = 0644,
1039 .proc_handler = proc_dointvec
1040 },
e0a1e5b5
ED		 1041 {
1042 .procname = "tcp_retrans_collapse",
1043 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
1044 .maxlen = sizeof(int),
1045 .mode = 0644,
1046 .proc_handler = proc_dointvec
1047 },
3f4c7c6f
ED		 1048 {
1049 .procname = "tcp_stdurg",
1050 .data = &init_net.ipv4.sysctl_tcp_stdurg,
1051 .maxlen = sizeof(int),
1052 .mode = 0644,
1053 .proc_handler = proc_dointvec
1054 },
625357aa
ED		 1055 {
1056 .procname = "tcp_rfc1337",
1057 .data = &init_net.ipv4.sysctl_tcp_rfc1337,
1058 .maxlen = sizeof(int),
1059 .mode = 0644,
1060 .proc_handler = proc_dointvec
1061 },
65c9410c
ED		 1062 {
1063 .procname = "tcp_abort_on_overflow",
1064 .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
1065 .maxlen = sizeof(int),
1066 .mode = 0644,
1067 .proc_handler = proc_dointvec
1068 },
0bc65a28
ED		 1069 {
1070 .procname = "tcp_fack",
1071 .data = &init_net.ipv4.sysctl_tcp_fack,
1072 .maxlen = sizeof(int),
1073 .mode = 0644,
1074 .proc_handler = proc_dointvec
1075 },
c6e21803
ED		 1076 {
1077 .procname = "tcp_max_reordering",
1078 .data = &init_net.ipv4.sysctl_tcp_max_reordering,
1079 .maxlen = sizeof(int),
1080 .mode = 0644,
1081 .proc_handler = proc_dointvec
1082 },
6496f6bd
ED		 1083 {
1084 .procname = "tcp_dsack",
1085 .data = &init_net.ipv4.sysctl_tcp_dsack,
1086 .maxlen = sizeof(int),
1087 .mode = 0644,
1088 .proc_handler = proc_dointvec
1089 },
0c12654a
ED		 1090 {
1091 .procname = "tcp_app_win",
1092 .data = &init_net.ipv4.sysctl_tcp_app_win,
1093 .maxlen = sizeof(int),
1094 .mode = 0644,
1095 .proc_handler = proc_dointvec
1096 },
94f0893e
ED		 1097 {
1098 .procname = "tcp_adv_win_scale",
1099 .data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
1100 .maxlen = sizeof(int),
1101 .mode = 0644,
1102 .proc_handler = proc_dointvec_minmax,
1103 .extra1 = &tcp_adv_win_scale_min,
1104 .extra2 = &tcp_adv_win_scale_max,
1105 },
af9b69a7
ED		 1106 {
1107 .procname = "tcp_frto",
1108 .data = &init_net.ipv4.sysctl_tcp_frto,
1109 .maxlen = sizeof(int),
1110 .mode = 0644,
1111 .proc_handler = proc_dointvec
1112 },
ec36e416
ED		 1113 {
1114 .procname = "tcp_no_metrics_save",
1115 .data = &init_net.ipv4.sysctl_tcp_nometrics_save,
1116 .maxlen = sizeof(int),
1117 .mode = 0644,
1118 .proc_handler = proc_dointvec,
1119 },
4540c0cf
ED		 1120 {
1121 .procname = "tcp_moderate_rcvbuf",
1122 .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
1123 .maxlen = sizeof(int),
1124 .mode = 0644,
1125 .proc_handler = proc_dointvec,
1126 },
d06a9904
ED		 1127 {
1128 .procname = "tcp_tso_win_divisor",
1129 .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
1130 .maxlen = sizeof(int),
1131 .mode = 0644,
1132 .proc_handler = proc_dointvec,
1133 },
ceef9ab6
ED		 1134 {
1135 .procname = "tcp_workaround_signed_windows",
1136 .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
1137 .maxlen = sizeof(int),
1138 .mode = 0644,
1139 .proc_handler = proc_dointvec
1140 },
9184d8bb
ED		 1141 {
1142 .procname = "tcp_limit_output_bytes",
1143 .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
1144 .maxlen = sizeof(int),
1145 .mode = 0644,
1146 .proc_handler = proc_dointvec
1147 },
68528f09
PE		 1148 { }
1149};
1150
1577519d
PE		 1151static __net_init int ipv4_sysctl_init_net(struct net *net)
1152{
68528f09
PE		 1153 struct ctl_table *table;
1154
1155 table = ipv4_net_table;
09ad9bc7 1156 if (!net_eq(net, &init_net)) {
0a6fa23d
EB		 1157 int i;
1158
68528f09 1159 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
51456b29 1160 if (!table)
68528f09
PE		 1161 goto err_alloc;
1162
0a6fa23d
EB		 1163 /* Update the variables to point into the current struct net */
1164 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
1165 table[i].data += (void *)net - (void *)&init_net;
68528f09
PE		 1166 }
1167
ec8f23ce 1168 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
51456b29 1169 if (!net->ipv4.ipv4_hdr)
68528f09
PE		 1170 goto err_reg;
1171
122ff243
WC		 1172 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1173 if (!net->ipv4.sysctl_local_reserved_ports)
1174 goto err_ports;
1175
1577519d 1176 return 0;
68528f09 1177
122ff243
WC		 1178err_ports:
1179 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
68528f09 1180err_reg:
09ad9bc7 1181 if (!net_eq(net, &init_net))
68528f09
PE		 1182 kfree(table);
1183err_alloc:
1184 return -ENOMEM;
1577519d
PE		 1185}
1186
1187static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1188{
68528f09
PE		 1189 struct ctl_table *table;
1190
122ff243 1191 kfree(net->ipv4.sysctl_local_reserved_ports);
68528f09
PE		 1192 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1193 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1194 kfree(table);
1577519d
PE		 1195}
1196
1197static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1198 .init = ipv4_sysctl_init_net,
1199 .exit = ipv4_sysctl_exit_net,
1200};
1201
3e37c3f9
PE		 1202static __init int sysctl_ipv4_init(void)
1203{
1204 struct ctl_table_header *hdr;
1205
ec8f23ce 1206 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
51456b29 1207 if (!hdr)
1577519d
PE		 1208 return -ENOMEM;
1209
1210 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
5dd3df10 1211 unregister_net_sysctl_table(hdr);
1577519d
PE		 1212 return -ENOMEM;
1213 }
1214
1215 return 0;
3e37c3f9
PE		 1216}
1217
1218__initcall(sysctl_ipv4_init);
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