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b2441318 1// SPDX-License-Identifier: GPL-2.0
1da177e4
LT		 2/*
3 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
4 *
1da177e4
LT		 5 * Begun April 1, 1996, Mike Shaver.
6 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
7 */
8
9#include <linux/mm.h>
10#include <linux/module.h>
11#include <linux/sysctl.h>
20380731 12#include <linux/igmp.h>
14c85021 13#include <linux/inetdevice.h>
227b60f5 14#include <linux/seqlock.h>
3e37c3f9 15#include <linux/init.h>
5a0e3ad6 16#include <linux/slab.h>
c319b4d7 17#include <linux/nsproxy.h>
3dc43e3e 18#include <linux/swap.h>
1da177e4 19#include <net/snmp.h>
20380731 20#include <net/icmp.h>
1da177e4
LT		 21#include <net/ip.h>
22#include <net/route.h>
23#include <net/tcp.h>
95766fff 24#include <net/udp.h>
446fda4f 25#include <net/cipso_ipv4.h>
04128f23 26#include <net/inet_frag.h>
c319b4d7 27#include <net/ping.h>
dddb64bc 28#include <net/protocol.h>
3ae6ec08 29#include <net/netevent.h>
1da177e4 30
89cee8b1 31static int zero;
cdda8891 32static int one = 1;
6ba8a3b1 33static int four = 4;
43e122b0 34static int thousand = 1000;
95bd09eb 35static int gso_max_segs = GSO_MAX_SEGS;
e905a9ed 36static int tcp_retr1_max = 255;
1da177e4
LT		 37static int ip_local_port_range_min[] = { 1, 1 };
38static int ip_local_port_range_max[] = { 65535, 65535 };
0147fc05
AD		 39static int tcp_adv_win_scale_min = -31;
40static int tcp_adv_win_scale_max = 31;
4548b683
KJ		 41static int ip_privileged_port_min;
42static int ip_privileged_port_max = 65535;
249fab77
ED		 43static int ip_ttl_min = 1;
44static int ip_ttl_max = 255;
651e9271
MT		 45static int tcp_syn_retries_min = 1;
46static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
c319b4d7
VK		 47static int ip_ping_group_range_min[] = { 0, 0 };
48static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
1da177e4 49
b6690b14
FW		 50/* obsolete */
51static int sysctl_tcp_low_latency __read_mostly;
52
227b60f5 53/* Update system visible IP port range */
0bbf87d8 54static void set_local_port_range(struct net *net, int range[2])
227b60f5 55{
ed2dfd90
ED		 56 bool same_parity = !((range[0] ^ range[1]) & 1);
57
4ee3bd4a 58 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
ed2dfd90
ED		 59 if (same_parity && !net->ipv4.ip_local_ports.warned) {
60 net->ipv4.ip_local_ports.warned = true;
61 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
62 }
c9d8f1a6
CW		 63 net->ipv4.ip_local_ports.range[0] = range[0];
64 net->ipv4.ip_local_ports.range[1] = range[1];
4ee3bd4a 65 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
227b60f5
SH		 66}
67
68/* Validate changes from /proc interface. */
fe2c6338 69static int ipv4_local_port_range(struct ctl_table *table, int write,
227b60f5
SH		 70 void __user *buffer,
71 size_t *lenp, loff_t *ppos)
72{
0bbf87d8 73 struct net *net =
c9d8f1a6 74 container_of(table->data, struct net, ipv4.ip_local_ports.range);
227b60f5 75 int ret;
3c689b73 76 int range[2];
fe2c6338 77 struct ctl_table tmp = {
227b60f5
SH		 78 .data = &range,
79 .maxlen = sizeof(range),
80 .mode = table->mode,
81 .extra1 = &ip_local_port_range_min,
82 .extra2 = &ip_local_port_range_max,
83 };
84
0bbf87d8
EB		 85 inet_get_local_port_range(net, &range[0], &range[1]);
86
8d65af78 87 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
227b60f5
SH		 88
89 if (write && ret == 0) {
4548b683
KJ		 90 /* Ensure that the upper limit is not smaller than the lower,
91 * and that the lower does not encroach upon the privileged
92 * port limit.
93 */
94 if ((range[1] < range[0]) ||
95 (range[0] < net->ipv4.sysctl_ip_prot_sock))
227b60f5
SH		 96 ret = -EINVAL;
97 else
0bbf87d8 98 set_local_port_range(net, range);
227b60f5
SH		 99 }
100
101 return ret;
102}
103
4548b683
KJ		 104/* Validate changes from /proc interface. */
105static int ipv4_privileged_ports(struct ctl_table *table, int write,
106 void __user *buffer, size_t *lenp, loff_t *ppos)
107{
108 struct net *net = container_of(table->data, struct net,
109 ipv4.sysctl_ip_prot_sock);
110 int ret;
111 int pports;
112 int range[2];
113 struct ctl_table tmp = {
114 .data = &pports,
115 .maxlen = sizeof(pports),
116 .mode = table->mode,
117 .extra1 = &ip_privileged_port_min,
118 .extra2 = &ip_privileged_port_max,
119 };
120
121 pports = net->ipv4.sysctl_ip_prot_sock;
122
123 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
124
125 if (write && ret == 0) {
126 inet_get_local_port_range(net, &range[0], &range[1]);
127 /* Ensure that the local port range doesn't overlap with the
128 * privileged port range.
129 */
130 if (range[0] < pports)
131 ret = -EINVAL;
132 else
133 net->ipv4.sysctl_ip_prot_sock = pports;
134 }
135
136 return ret;
137}
c319b4d7 138
7064d16e 139static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
c319b4d7 140{
7064d16e 141 kgid_t *data = table->data;
0bbf87d8 142 struct net *net =
ba6b918a 143 container_of(table->data, struct net, ipv4.ping_group_range.range);
95c96174 144 unsigned int seq;
c319b4d7 145 do {
396a30cc 146 seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 147
148 *low = data[0];
149 *high = data[1];
396a30cc 150 } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
c319b4d7
VK		 151}
152
153/* Update system visible IP port range */
7064d16e 154static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
c319b4d7 155{
7064d16e 156 kgid_t *data = table->data;
0bbf87d8 157 struct net *net =
ba6b918a 158 container_of(table->data, struct net, ipv4.ping_group_range.range);
396a30cc 159 write_seqlock(&net->ipv4.ping_group_range.lock);
7064d16e
EB		 160 data[0] = low;
161 data[1] = high;
396a30cc 162 write_sequnlock(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 163}
164
165/* Validate changes from /proc interface. */
fe2c6338 166static int ipv4_ping_group_range(struct ctl_table *table, int write,
c319b4d7
VK		 167 void __user *buffer,
168 size_t *lenp, loff_t *ppos)
169{
7064d16e 170 struct user_namespace *user_ns = current_user_ns();
c319b4d7 171 int ret;
7064d16e
EB		 172 gid_t urange[2];
173 kgid_t low, high;
fe2c6338 174 struct ctl_table tmp = {
7064d16e
EB		 175 .data = &urange,
176 .maxlen = sizeof(urange),
c319b4d7
VK		 177 .mode = table->mode,
178 .extra1 = &ip_ping_group_range_min,
179 .extra2 = &ip_ping_group_range_max,
180 };
181
7064d16e
EB		 182 inet_get_ping_group_range_table(table, &low, &high);
183 urange[0] = from_kgid_munged(user_ns, low);
184 urange[1] = from_kgid_munged(user_ns, high);
c319b4d7
VK		 185 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
186
7064d16e
EB		 187 if (write && ret == 0) {
188 low = make_kgid(user_ns, urange[0]);
189 high = make_kgid(user_ns, urange[1]);
190 if (!gid_valid(low) || !gid_valid(high) ||
191 (urange[1] < urange[0]) || gid_lt(high, low)) {
192 low = make_kgid(&init_user_ns, 1);
193 high = make_kgid(&init_user_ns, 0);
194 }
195 set_ping_group_range(table, low, high);
196 }
c319b4d7
VK		 197
198 return ret;
199}
200
fe2c6338 201static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
317a76f9
SH		 202 void __user *buffer, size_t *lenp, loff_t *ppos)
203{
6670e152
SH		 204 struct net *net = container_of(ctl->data, struct net,
205 ipv4.tcp_congestion_control);
317a76f9 206 char val[TCP_CA_NAME_MAX];
fe2c6338 207 struct ctl_table tbl = {
317a76f9
SH		 208 .data = val,
209 .maxlen = TCP_CA_NAME_MAX,
210 };
211 int ret;
212
6670e152 213 tcp_get_default_congestion_control(net, val);
317a76f9 214
8d65af78 215 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
317a76f9 216 if (write && ret == 0)
6670e152 217 ret = tcp_set_default_congestion_control(net, val);
317a76f9
SH		 218 return ret;
219}
220
fe2c6338 221static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
8d65af78 222 int write,
3ff825b2
SH		 223 void __user *buffer, size_t *lenp,
224 loff_t *ppos)
225{
fe2c6338 226 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
3ff825b2
SH		 227 int ret;
228
229 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
230 if (!tbl.data)
231 return -ENOMEM;
232 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
8d65af78 233 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
3ff825b2
SH		 234 kfree(tbl.data);
235 return ret;
236}
237
fe2c6338 238static int proc_allowed_congestion_control(struct ctl_table *ctl,
8d65af78 239 int write,
ce7bc3bf
SH		 240 void __user *buffer, size_t *lenp,
241 loff_t *ppos)
242{
fe2c6338 243 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
ce7bc3bf
SH		 244 int ret;
245
246 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
247 if (!tbl.data)
248 return -ENOMEM;
249
250 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
8d65af78 251 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ce7bc3bf
SH		 252 if (write && ret == 0)
253 ret = tcp_set_allowed_congestion_control(tbl.data);
254 kfree(tbl.data);
255 return ret;
256}
257
43713848 258static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
fe2c6338
JP		 259 void __user *buffer, size_t *lenp,
260 loff_t *ppos)
10467163 261{
43713848
HY		 262 struct net *net = container_of(table->data, struct net,
263 ipv4.sysctl_tcp_fastopen);
fe2c6338 264 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
10467163
JC		 265 struct tcp_fastopen_context *ctxt;
266 int ret;
267 u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
268
269 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
270 if (!tbl.data)
271 return -ENOMEM;
272
273 rcu_read_lock();
43713848 274 ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx);
10467163
JC		 275 if (ctxt)
276 memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
0e24c4fc
AC		 277 else
278 memset(user_key, 0, sizeof(user_key));
10467163
JC		 279 rcu_read_unlock();
280
281 snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
282 user_key[0], user_key[1], user_key[2], user_key[3]);
283 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
284
285 if (write && ret == 0) {
286 if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
287 user_key + 2, user_key + 3) != 4) {
288 ret = -EINVAL;
289 goto bad_key;
290 }
1fba70e5
YC		 291 tcp_fastopen_reset_cipher(net, NULL, user_key,
292 TCP_FASTOPEN_KEY_LENGTH);
10467163
JC		 293 }
294
295bad_key:
296 pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
297 user_key[0], user_key[1], user_key[2], user_key[3],
298 (char *)tbl.data, ret);
299 kfree(tbl.data);
300 return ret;
301}
302
dddb64bc
SAK		 303static void proc_configure_early_demux(int enabled, int protocol)
304{
305 struct net_protocol *ipprot;
306#if IS_ENABLED(CONFIG_IPV6)
307 struct inet6_protocol *ip6prot;
308#endif
309
58c4c6a3
DA		 310 rcu_read_lock();
311
dddb64bc
SAK		 312 ipprot = rcu_dereference(inet_protos[protocol]);
313 if (ipprot)
314 ipprot->early_demux = enabled ? ipprot->early_demux_handler :
315 NULL;
316
317#if IS_ENABLED(CONFIG_IPV6)
318 ip6prot = rcu_dereference(inet6_protos[protocol]);
319 if (ip6prot)
320 ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
321 NULL;
322#endif
58c4c6a3 323 rcu_read_unlock();
dddb64bc
SAK		 324}
325
326static int proc_tcp_early_demux(struct ctl_table *table, int write,
327 void __user *buffer, size_t *lenp, loff_t *ppos)
328{
329 int ret = 0;
330
331 ret = proc_dointvec(table, write, buffer, lenp, ppos);
332
333 if (write && !ret) {
334 int enabled = init_net.ipv4.sysctl_tcp_early_demux;
335
336 proc_configure_early_demux(enabled, IPPROTO_TCP);
337 }
338
339 return ret;
340}
341
342static int proc_udp_early_demux(struct ctl_table *table, int write,
343 void __user *buffer, size_t *lenp, loff_t *ppos)
344{
345 int ret = 0;
346
347 ret = proc_dointvec(table, write, buffer, lenp, ppos);
348
349 if (write && !ret) {
350 int enabled = init_net.ipv4.sysctl_udp_early_demux;
351
352 proc_configure_early_demux(enabled, IPPROTO_UDP);
353 }
354
355 return ret;
356}
357
cf1ef3f0
WW		 358static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table,
359 int write,
360 void __user *buffer,
361 size_t *lenp, loff_t *ppos)
362{
3733be14
HY		 363 struct net *net = container_of(table->data, struct net,
364 ipv4.sysctl_tcp_fastopen_blackhole_timeout);
cf1ef3f0
WW		 365 int ret;
366
367 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
368 if (write && ret == 0)
3733be14 369 atomic_set(&net->ipv4.tfo_active_disable_times, 0);
734942cc
DW		 370
371 return ret;
372}
373
374static int proc_tcp_available_ulp(struct ctl_table *ctl,
375 int write,
376 void __user *buffer, size_t *lenp,
377 loff_t *ppos)
378{
379 struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
380 int ret;
381
382 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
383 if (!tbl.data)
384 return -ENOMEM;
385 tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
386 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
387 kfree(tbl.data);
388
cf1ef3f0
WW		 389 return ret;
390}
391
3ae6ec08
IS		 392#ifdef CONFIG_IP_ROUTE_MULTIPATH
393static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write,
394 void __user *buffer, size_t *lenp,
395 loff_t *ppos)
396{
397 struct net *net = container_of(table->data, struct net,
398 ipv4.sysctl_fib_multipath_hash_policy);
399 int ret;
400
401 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
402 if (write && ret == 0)
3192dac6 403 call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net);
3ae6ec08
IS		 404
405 return ret;
406}
407#endif
408
3e37c3f9 409static struct ctl_table ipv4_table[] = {
1da177e4 410 {
1da177e4
LT		 411 .procname = "tcp_max_orphans",
412 .data = &sysctl_tcp_max_orphans,
413 .maxlen = sizeof(int),
414 .mode = 0644,
6d9f239a 415 .proc_handler = proc_dointvec
1da177e4 416 },
1da177e4 417 {
1da177e4
LT		 418 .procname = "inet_peer_threshold",
419 .data = &inet_peer_threshold,
420 .maxlen = sizeof(int),
421 .mode = 0644,
6d9f239a 422 .proc_handler = proc_dointvec
1da177e4
LT		 423 },
424 {
1da177e4
LT		 425 .procname = "inet_peer_minttl",
426 .data = &inet_peer_minttl,
427 .maxlen = sizeof(int),
428 .mode = 0644,
6d9f239a 429 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 430 },
431 {
1da177e4
LT		 432 .procname = "inet_peer_maxttl",
433 .data = &inet_peer_maxttl,
434 .maxlen = sizeof(int),
435 .mode = 0644,
6d9f239a 436 .proc_handler = proc_dointvec_jiffies,
1da177e4 437 },
a4fe34bf
EB		 438 {
439 .procname = "tcp_mem",
440 .maxlen = sizeof(sysctl_tcp_mem),
441 .data = &sysctl_tcp_mem,
442 .mode = 0644,
443 .proc_handler = proc_doulongvec_minmax,
444 },
1da177e4 445 {
1da177e4
LT		 446 .procname = "tcp_low_latency",
447 .data = &sysctl_tcp_low_latency,
448 .maxlen = sizeof(int),
449 .mode = 0644,
6d9f239a 450 .proc_handler = proc_dointvec
1da177e4 451 },
446fda4f
PM		 452#ifdef CONFIG_NETLABEL
453 {
446fda4f
PM		 454 .procname = "cipso_cache_enable",
455 .data = &cipso_v4_cache_enabled,
456 .maxlen = sizeof(int),
457 .mode = 0644,
6d9f239a 458 .proc_handler = proc_dointvec,
446fda4f
PM		 459 },
460 {
446fda4f
PM		 461 .procname = "cipso_cache_bucket_size",
462 .data = &cipso_v4_cache_bucketsize,
463 .maxlen = sizeof(int),
464 .mode = 0644,
6d9f239a 465 .proc_handler = proc_dointvec,
446fda4f
PM		 466 },
467 {
446fda4f
PM		 468 .procname = "cipso_rbm_optfmt",
469 .data = &cipso_v4_rbm_optfmt,
470 .maxlen = sizeof(int),
471 .mode = 0644,
6d9f239a 472 .proc_handler = proc_dointvec,
446fda4f
PM		 473 },
474 {
446fda4f
PM		 475 .procname = "cipso_rbm_strictvalid",
476 .data = &cipso_v4_rbm_strictvalid,
477 .maxlen = sizeof(int),
478 .mode = 0644,
6d9f239a 479 .proc_handler = proc_dointvec,
446fda4f
PM		 480 },
481#endif /* CONFIG_NETLABEL */
3ff825b2 482 {
3ff825b2
SH		 483 .procname = "tcp_available_congestion_control",
484 .maxlen = TCP_CA_BUF_MAX,
485 .mode = 0444,
6d9f239a 486 .proc_handler = proc_tcp_available_congestion_control,
3ff825b2 487 },
ce7bc3bf 488 {
ce7bc3bf
SH		 489 .procname = "tcp_allowed_congestion_control",
490 .maxlen = TCP_CA_BUF_MAX,
491 .mode = 0644,
6d9f239a 492 .proc_handler = proc_allowed_congestion_control,
ce7bc3bf 493 },
734942cc
DW		 494 {
495 .procname = "tcp_available_ulp",
496 .maxlen = TCP_ULP_BUF_MAX,
497 .mode = 0444,
498 .proc_handler = proc_tcp_available_ulp,
499 },
4cdf507d
ED		 500 {
501 .procname = "icmp_msgs_per_sec",
502 .data = &sysctl_icmp_msgs_per_sec,
503 .maxlen = sizeof(int),
504 .mode = 0644,
505 .proc_handler = proc_dointvec_minmax,
506 .extra1 = &zero,
507 },
508 {
509 .procname = "icmp_msgs_burst",
510 .data = &sysctl_icmp_msgs_burst,
511 .maxlen = sizeof(int),
512 .mode = 0644,
513 .proc_handler = proc_dointvec_minmax,
514 .extra1 = &zero,
515 },
95766fff 516 {
95766fff
HA		 517 .procname = "udp_mem",
518 .data = &sysctl_udp_mem,
519 .maxlen = sizeof(sysctl_udp_mem),
520 .mode = 0644,
8d987e5c 521 .proc_handler = proc_doulongvec_minmax,
95766fff 522 },
f8572d8f 523 { }
1da177e4 524};
3e37c3f9 525
68528f09
PE		 526static struct ctl_table ipv4_net_table[] = {
527 {
68528f09
PE		 528 .procname = "icmp_echo_ignore_all",
529 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
530 .maxlen = sizeof(int),
531 .mode = 0644,
6d9f239a 532 .proc_handler = proc_dointvec
68528f09
PE		 533 },
534 {
68528f09
PE		 535 .procname = "icmp_echo_ignore_broadcasts",
536 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
537 .maxlen = sizeof(int),
538 .mode = 0644,
6d9f239a 539 .proc_handler = proc_dointvec
68528f09
PE		 540 },
541 {
68528f09
PE		 542 .procname = "icmp_ignore_bogus_error_responses",
543 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
544 .maxlen = sizeof(int),
545 .mode = 0644,
6d9f239a 546 .proc_handler = proc_dointvec
68528f09
PE		 547 },
548 {
68528f09
PE		 549 .procname = "icmp_errors_use_inbound_ifaddr",
550 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
551 .maxlen = sizeof(int),
552 .mode = 0644,
6d9f239a 553 .proc_handler = proc_dointvec
68528f09
PE		 554 },
555 {
68528f09
PE		 556 .procname = "icmp_ratelimit",
557 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
558 .maxlen = sizeof(int),
559 .mode = 0644,
6d9f239a 560 .proc_handler = proc_dointvec_ms_jiffies,
68528f09
PE		 561 },
562 {
68528f09
PE		 563 .procname = "icmp_ratemask",
564 .data = &init_net.ipv4.sysctl_icmp_ratemask,
565 .maxlen = sizeof(int),
566 .mode = 0644,
6d9f239a 567 .proc_handler = proc_dointvec
68528f09 568 },
c319b4d7
VK		 569 {
570 .procname = "ping_group_range",
ba6b918a 571 .data = &init_net.ipv4.ping_group_range.range,
7064d16e 572 .maxlen = sizeof(gid_t)*2,
c319b4d7
VK		 573 .mode = 0644,
574 .proc_handler = ipv4_ping_group_range,
575 },
5d134f1c
HFS		 576 {
577 .procname = "tcp_ecn",
578 .data = &init_net.ipv4.sysctl_tcp_ecn,
579 .maxlen = sizeof(int),
580 .mode = 0644,
581 .proc_handler = proc_dointvec
582 },
49213555
DB		 583 {
584 .procname = "tcp_ecn_fallback",
585 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
586 .maxlen = sizeof(int),
587 .mode = 0644,
588 .proc_handler = proc_dointvec
589 },
287b7f38
NB		 590 {
591 .procname = "ip_dynaddr",
592 .data = &init_net.ipv4.sysctl_ip_dynaddr,
593 .maxlen = sizeof(int),
594 .mode = 0644,
595 .proc_handler = proc_dointvec
596 },
e21145a9
NB		 597 {
598 .procname = "ip_early_demux",
599 .data = &init_net.ipv4.sysctl_ip_early_demux,
600 .maxlen = sizeof(int),
601 .mode = 0644,
602 .proc_handler = proc_dointvec
603 },
dddb64bc
SAK		 604 {
605 .procname = "udp_early_demux",
606 .data = &init_net.ipv4.sysctl_udp_early_demux,
607 .maxlen = sizeof(int),
608 .mode = 0644,
609 .proc_handler = proc_udp_early_demux
610 },
611 {
612 .procname = "tcp_early_demux",
613 .data = &init_net.ipv4.sysctl_tcp_early_demux,
614 .maxlen = sizeof(int),
615 .mode = 0644,
616 .proc_handler = proc_tcp_early_demux
617 },
fa50d974
NB		 618 {
619 .procname = "ip_default_ttl",
620 .data = &init_net.ipv4.sysctl_ip_default_ttl,
621 .maxlen = sizeof(int),
622 .mode = 0644,
623 .proc_handler = proc_dointvec_minmax,
624 .extra1 = &ip_ttl_min,
625 .extra2 = &ip_ttl_max,
626 },
0bbf87d8
EB		 627 {
628 .procname = "ip_local_port_range",
c9d8f1a6
CW		 629 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
630 .data = &init_net.ipv4.ip_local_ports.range,
0bbf87d8
EB		 631 .mode = 0644,
632 .proc_handler = ipv4_local_port_range,
633 },
122ff243
WC		 634 {
635 .procname = "ip_local_reserved_ports",
636 .data = &init_net.ipv4.sysctl_local_reserved_ports,
637 .maxlen = 65536,
638 .mode = 0644,
639 .proc_handler = proc_do_large_bitmap,
640 },
974eda11
HFS		 641 {
642 .procname = "ip_no_pmtu_disc",
643 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
644 .maxlen = sizeof(int),
645 .mode = 0644,
646 .proc_handler = proc_dointvec
647 },
f87c10a8
HFS		 648 {
649 .procname = "ip_forward_use_pmtu",
650 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
651 .maxlen = sizeof(int),
652 .mode = 0644,
653 .proc_handler = proc_dointvec,
654 },
49a60158
VB		 655 {
656 .procname = "ip_nonlocal_bind",
657 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
658 .maxlen = sizeof(int),
659 .mode = 0644,
660 .proc_handler = proc_dointvec
661 },
e110861f
LC		 662 {
663 .procname = "fwmark_reflect",
664 .data = &init_net.ipv4.sysctl_fwmark_reflect,
665 .maxlen = sizeof(int),
666 .mode = 0644,
667 .proc_handler = proc_dointvec,
668 },
84f39b08
LC		 669 {
670 .procname = "tcp_fwmark_accept",
671 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
672 .maxlen = sizeof(int),
673 .mode = 0644,
674 .proc_handler = proc_dointvec,
675 },
6dd9a14e
DA		 676#ifdef CONFIG_NET_L3_MASTER_DEV
677 {
678 .procname = "tcp_l3mdev_accept",
679 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
680 .maxlen = sizeof(int),
681 .mode = 0644,
682 .proc_handler = proc_dointvec_minmax,
683 .extra1 = &zero,
684 .extra2 = &one,
685 },
686#endif
b0f9ca53
FD		 687 {
688 .procname = "tcp_mtu_probing",
689 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
690 .maxlen = sizeof(int),
691 .mode = 0644,
692 .proc_handler = proc_dointvec,
693 },
694 {
695 .procname = "tcp_base_mss",
696 .data = &init_net.ipv4.sysctl_tcp_base_mss,
697 .maxlen = sizeof(int),
698 .mode = 0644,
699 .proc_handler = proc_dointvec,
700 },
6b58e0a5
FD		 701 {
702 .procname = "tcp_probe_threshold",
703 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
704 .maxlen = sizeof(int),
705 .mode = 0644,
706 .proc_handler = proc_dointvec,
707 },
05cbc0db
FD		 708 {
709 .procname = "tcp_probe_interval",
710 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
711 .maxlen = sizeof(int),
712 .mode = 0644,
713 .proc_handler = proc_dointvec,
714 },
df2cf4a7
PD		 715 {
716 .procname = "igmp_link_local_mcast_reports",
87a8a2ae 717 .data = &init_net.ipv4.sysctl_igmp_llm_reports,
df2cf4a7
PD		 718 .maxlen = sizeof(int),
719 .mode = 0644,
720 .proc_handler = proc_dointvec
721 },
815c5270
NB		 722 {
723 .procname = "igmp_max_memberships",
724 .data = &init_net.ipv4.sysctl_igmp_max_memberships,
725 .maxlen = sizeof(int),
726 .mode = 0644,
727 .proc_handler = proc_dointvec
728 },
166b6b2d
NB		 729 {
730 .procname = "igmp_max_msf",
731 .data = &init_net.ipv4.sysctl_igmp_max_msf,
732 .maxlen = sizeof(int),
733 .mode = 0644,
734 .proc_handler = proc_dointvec
735 },
165094af
NB		 736#ifdef CONFIG_IP_MULTICAST
737 {
738 .procname = "igmp_qrv",
739 .data = &init_net.ipv4.sysctl_igmp_qrv,
740 .maxlen = sizeof(int),
741 .mode = 0644,
742 .proc_handler = proc_dointvec_minmax,
743 .extra1 = &one
744 },
745#endif
6670e152
SH		 746 {
747 .procname = "tcp_congestion_control",
748 .data = &init_net.ipv4.tcp_congestion_control,
749 .mode = 0644,
750 .maxlen = TCP_CA_NAME_MAX,
751 .proc_handler = proc_tcp_congestion_control,
752 },
13b287e8
NB		 753 {
754 .procname = "tcp_keepalive_time",
755 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
756 .maxlen = sizeof(int),
757 .mode = 0644,
758 .proc_handler = proc_dointvec_jiffies,
759 },
9bd6861b
NB		 760 {
761 .procname = "tcp_keepalive_probes",
762 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
763 .maxlen = sizeof(int),
764 .mode = 0644,
765 .proc_handler = proc_dointvec
766 },
b840d15d
NB		 767 {
768 .procname = "tcp_keepalive_intvl",
769 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
770 .maxlen = sizeof(int),
771 .mode = 0644,
772 .proc_handler = proc_dointvec_jiffies,
773 },
6fa25166
NB		 774 {
775 .procname = "tcp_syn_retries",
776 .data = &init_net.ipv4.sysctl_tcp_syn_retries,
777 .maxlen = sizeof(int),
778 .mode = 0644,
779 .proc_handler = proc_dointvec_minmax,
780 .extra1 = &tcp_syn_retries_min,
781 .extra2 = &tcp_syn_retries_max
782 },
7c083ecb
NB		 783 {
784 .procname = "tcp_synack_retries",
785 .data = &init_net.ipv4.sysctl_tcp_synack_retries,
786 .maxlen = sizeof(int),
787 .mode = 0644,
788 .proc_handler = proc_dointvec
789 },
12ed8244
NB		 790#ifdef CONFIG_SYN_COOKIES
791 {
792 .procname = "tcp_syncookies",
793 .data = &init_net.ipv4.sysctl_tcp_syncookies,
794 .maxlen = sizeof(int),
795 .mode = 0644,
796 .proc_handler = proc_dointvec
797 },
798#endif
1043e25f
NB		 799 {
800 .procname = "tcp_reordering",
801 .data = &init_net.ipv4.sysctl_tcp_reordering,
802 .maxlen = sizeof(int),
803 .mode = 0644,
804 .proc_handler = proc_dointvec
805 },
ae5c3f40
NB		 806 {
807 .procname = "tcp_retries1",
808 .data = &init_net.ipv4.sysctl_tcp_retries1,
809 .maxlen = sizeof(int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec_minmax,
812 .extra2 = &tcp_retr1_max
813 },
c6214a97
NB		 814 {
815 .procname = "tcp_retries2",
816 .data = &init_net.ipv4.sysctl_tcp_retries2,
817 .maxlen = sizeof(int),
818 .mode = 0644,
819 .proc_handler = proc_dointvec
820 },
c402d9be
NB		 821 {
822 .procname = "tcp_orphan_retries",
823 .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
824 .maxlen = sizeof(int),
825 .mode = 0644,
826 .proc_handler = proc_dointvec
827 },
1e579caa
NB		 828 {
829 .procname = "tcp_fin_timeout",
830 .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
831 .maxlen = sizeof(int),
832 .mode = 0644,
833 .proc_handler = proc_dointvec_jiffies,
834 },
4979f2d9
NB		 835 {
836 .procname = "tcp_notsent_lowat",
837 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
838 .maxlen = sizeof(unsigned int),
839 .mode = 0644,
b007f090 840 .proc_handler = proc_douintvec,
4979f2d9 841 },
56ab6b93
HY		 842 {
843 .procname = "tcp_tw_reuse",
844 .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
845 .maxlen = sizeof(int),
846 .mode = 0644,
847 .proc_handler = proc_dointvec
848 },
1946e672
HY		 849 {
850 .procname = "tcp_max_tw_buckets",
851 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
852 .maxlen = sizeof(int),
853 .mode = 0644,
854 .proc_handler = proc_dointvec
855 },
fee83d09
HY		 856 {
857 .procname = "tcp_max_syn_backlog",
858 .data = &init_net.ipv4.sysctl_max_syn_backlog,
859 .maxlen = sizeof(int),
860 .mode = 0644,
861 .proc_handler = proc_dointvec
862 },
e1cfcbe8
HY		 863 {
864 .procname = "tcp_fastopen",
865 .data = &init_net.ipv4.sysctl_tcp_fastopen,
866 .maxlen = sizeof(int),
867 .mode = 0644,
868 .proc_handler = proc_dointvec,
869 },
43713848
HY		 870 {
871 .procname = "tcp_fastopen_key",
872 .mode = 0600,
873 .data = &init_net.ipv4.sysctl_tcp_fastopen,
874 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
875 .proc_handler = proc_tcp_fastopen_key,
876 },
3733be14
HY		 877 {
878 .procname = "tcp_fastopen_blackhole_timeout_sec",
879 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
880 .maxlen = sizeof(int),
881 .mode = 0644,
882 .proc_handler = proc_tfo_blackhole_detect_timeout,
883 .extra1 = &zero,
884 },
a6db4494
DA		 885#ifdef CONFIG_IP_ROUTE_MULTIPATH
886 {
887 .procname = "fib_multipath_use_neigh",
888 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
889 .maxlen = sizeof(int),
890 .mode = 0644,
891 .proc_handler = proc_dointvec_minmax,
bf4e0a3d
NA		 892 .extra1 = &zero,
893 .extra2 = &one,
894 },
895 {
896 .procname = "fib_multipath_hash_policy",
897 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
898 .maxlen = sizeof(int),
899 .mode = 0644,
3ae6ec08 900 .proc_handler = proc_fib_multipath_hash_policy,
a6db4494
DA		 901 .extra1 = &zero,
902 .extra2 = &one,
903 },
904#endif
4548b683
KJ		 905 {
906 .procname = "ip_unprivileged_port_start",
907 .maxlen = sizeof(int),
908 .data = &init_net.ipv4.sysctl_ip_prot_sock,
909 .mode = 0644,
910 .proc_handler = ipv4_privileged_ports,
911 },
63a6fff3
RS		 912#ifdef CONFIG_NET_L3_MASTER_DEV
913 {
914 .procname = "udp_l3mdev_accept",
915 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
916 .maxlen = sizeof(int),
917 .mode = 0644,
918 .proc_handler = proc_dointvec_minmax,
919 .extra1 = &zero,
920 .extra2 = &one,
921 },
922#endif
f9301034
ED		 923 {
924 .procname = "tcp_sack",
925 .data = &init_net.ipv4.sysctl_tcp_sack,
926 .maxlen = sizeof(int),
927 .mode = 0644,
928 .proc_handler = proc_dointvec
929 },
9bb37ef0
ED		 930 {
931 .procname = "tcp_window_scaling",
932 .data = &init_net.ipv4.sysctl_tcp_window_scaling,
933 .maxlen = sizeof(int),
934 .mode = 0644,
935 .proc_handler = proc_dointvec
936 },
5d2ed052
ED		 937 {
938 .procname = "tcp_timestamps",
939 .data = &init_net.ipv4.sysctl_tcp_timestamps,
940 .maxlen = sizeof(int),
941 .mode = 0644,
942 .proc_handler = proc_dointvec
943 },
2ae21cf5
ED		 944 {
945 .procname = "tcp_early_retrans",
946 .data = &init_net.ipv4.sysctl_tcp_early_retrans,
947 .maxlen = sizeof(int),
948 .mode = 0644,
949 .proc_handler = proc_dointvec_minmax,
950 .extra1 = &zero,
951 .extra2 = &four,
952 },
e20223f1
ED		 953 {
954 .procname = "tcp_recovery",
955 .data = &init_net.ipv4.sysctl_tcp_recovery,
956 .maxlen = sizeof(int),
957 .mode = 0644,
958 .proc_handler = proc_dointvec,
959 },
2c04ac8a
ED		 960 {
961 .procname = "tcp_thin_linear_timeouts",
962 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
963 .maxlen = sizeof(int),
964 .mode = 0644,
965 .proc_handler = proc_dointvec
966 },
b510f0d2
ED		 967 {
968 .procname = "tcp_slow_start_after_idle",
969 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
970 .maxlen = sizeof(int),
971 .mode = 0644,
972 .proc_handler = proc_dointvec
973 },
e0a1e5b5
ED		 974 {
975 .procname = "tcp_retrans_collapse",
976 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
977 .maxlen = sizeof(int),
978 .mode = 0644,
979 .proc_handler = proc_dointvec
980 },
3f4c7c6f
ED		 981 {
982 .procname = "tcp_stdurg",
983 .data = &init_net.ipv4.sysctl_tcp_stdurg,
984 .maxlen = sizeof(int),
985 .mode = 0644,
986 .proc_handler = proc_dointvec
987 },
625357aa
ED		 988 {
989 .procname = "tcp_rfc1337",
990 .data = &init_net.ipv4.sysctl_tcp_rfc1337,
991 .maxlen = sizeof(int),
992 .mode = 0644,
993 .proc_handler = proc_dointvec
994 },
65c9410c
ED		 995 {
996 .procname = "tcp_abort_on_overflow",
997 .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
998 .maxlen = sizeof(int),
999 .mode = 0644,
1000 .proc_handler = proc_dointvec
1001 },
0bc65a28
ED		 1002 {
1003 .procname = "tcp_fack",
1004 .data = &init_net.ipv4.sysctl_tcp_fack,
1005 .maxlen = sizeof(int),
1006 .mode = 0644,
1007 .proc_handler = proc_dointvec
1008 },
c6e21803
ED		 1009 {
1010 .procname = "tcp_max_reordering",
1011 .data = &init_net.ipv4.sysctl_tcp_max_reordering,
1012 .maxlen = sizeof(int),
1013 .mode = 0644,
1014 .proc_handler = proc_dointvec
1015 },
6496f6bd
ED		 1016 {
1017 .procname = "tcp_dsack",
1018 .data = &init_net.ipv4.sysctl_tcp_dsack,
1019 .maxlen = sizeof(int),
1020 .mode = 0644,
1021 .proc_handler = proc_dointvec
1022 },
0c12654a
ED		 1023 {
1024 .procname = "tcp_app_win",
1025 .data = &init_net.ipv4.sysctl_tcp_app_win,
1026 .maxlen = sizeof(int),
1027 .mode = 0644,
1028 .proc_handler = proc_dointvec
1029 },
94f0893e
ED		 1030 {
1031 .procname = "tcp_adv_win_scale",
1032 .data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
1033 .maxlen = sizeof(int),
1034 .mode = 0644,
1035 .proc_handler = proc_dointvec_minmax,
1036 .extra1 = &tcp_adv_win_scale_min,
1037 .extra2 = &tcp_adv_win_scale_max,
1038 },
af9b69a7
ED		 1039 {
1040 .procname = "tcp_frto",
1041 .data = &init_net.ipv4.sysctl_tcp_frto,
1042 .maxlen = sizeof(int),
1043 .mode = 0644,
1044 .proc_handler = proc_dointvec
1045 },
ec36e416
ED		 1046 {
1047 .procname = "tcp_no_metrics_save",
1048 .data = &init_net.ipv4.sysctl_tcp_nometrics_save,
1049 .maxlen = sizeof(int),
1050 .mode = 0644,
1051 .proc_handler = proc_dointvec,
1052 },
4540c0cf
ED		 1053 {
1054 .procname = "tcp_moderate_rcvbuf",
1055 .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
1056 .maxlen = sizeof(int),
1057 .mode = 0644,
1058 .proc_handler = proc_dointvec,
1059 },
d06a9904
ED		 1060 {
1061 .procname = "tcp_tso_win_divisor",
1062 .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
1063 .maxlen = sizeof(int),
1064 .mode = 0644,
1065 .proc_handler = proc_dointvec,
1066 },
ceef9ab6
ED		 1067 {
1068 .procname = "tcp_workaround_signed_windows",
1069 .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
1070 .maxlen = sizeof(int),
1071 .mode = 0644,
1072 .proc_handler = proc_dointvec
1073 },
9184d8bb
ED		 1074 {
1075 .procname = "tcp_limit_output_bytes",
1076 .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
1077 .maxlen = sizeof(int),
1078 .mode = 0644,
1079 .proc_handler = proc_dointvec
1080 },
b530b681
ED		 1081 {
1082 .procname = "tcp_challenge_ack_limit",
1083 .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit,
1084 .maxlen = sizeof(int),
1085 .mode = 0644,
1086 .proc_handler = proc_dointvec
1087 },
26e9596e
ED		 1088 {
1089 .procname = "tcp_min_tso_segs",
1090 .data = &init_net.ipv4.sysctl_tcp_min_tso_segs,
1091 .maxlen = sizeof(int),
1092 .mode = 0644,
1093 .proc_handler = proc_dointvec_minmax,
1094 .extra1 = &one,
1095 .extra2 = &gso_max_segs,
1096 },
bd239704
ED		 1097 {
1098 .procname = "tcp_min_rtt_wlen",
1099 .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
1100 .maxlen = sizeof(int),
1101 .mode = 0644,
1102 .proc_handler = proc_dointvec
1103 },
790f00e1
ED		 1104 {
1105 .procname = "tcp_autocorking",
1106 .data = &init_net.ipv4.sysctl_tcp_autocorking,
1107 .maxlen = sizeof(int),
1108 .mode = 0644,
1109 .proc_handler = proc_dointvec_minmax,
1110 .extra1 = &zero,
1111 .extra2 = &one,
1112 },
4170ba6b
ED		 1113 {
1114 .procname = "tcp_invalid_ratelimit",
1115 .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit,
1116 .maxlen = sizeof(int),
1117 .mode = 0644,
1118 .proc_handler = proc_dointvec_ms_jiffies,
1119 },
23a7102a
ED		 1120 {
1121 .procname = "tcp_pacing_ss_ratio",
1122 .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,
1123 .maxlen = sizeof(int),
1124 .mode = 0644,
1125 .proc_handler = proc_dointvec_minmax,
1126 .extra1 = &zero,
1127 .extra2 = &thousand,
1128 },
c26e91f8
ED		 1129 {
1130 .procname = "tcp_pacing_ca_ratio",
1131 .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio,
1132 .maxlen = sizeof(int),
1133 .mode = 0644,
1134 .proc_handler = proc_dointvec_minmax,
1135 .extra1 = &zero,
1136 .extra2 = &thousand,
1137 },
356d1833
ED		 1138 {
1139 .procname = "tcp_wmem",
1140 .data = &init_net.ipv4.sysctl_tcp_wmem,
1141 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem),
1142 .mode = 0644,
1143 .proc_handler = proc_dointvec_minmax,
1144 .extra1 = &one,
1145 },
1146 {
1147 .procname = "tcp_rmem",
1148 .data = &init_net.ipv4.sysctl_tcp_rmem,
1149 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem),
1150 .mode = 0644,
1151 .proc_handler = proc_dointvec_minmax,
1152 .extra1 = &one,
1153 },
1e802951
TZ		 1154 {
1155 .procname = "udp_rmem_min",
1156 .data = &init_net.ipv4.sysctl_udp_rmem_min,
1157 .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min),
1158 .mode = 0644,
1159 .proc_handler = proc_dointvec_minmax,
1160 .extra1 = &one
1161 },
1162 {
1163 .procname = "udp_wmem_min",
1164 .data = &init_net.ipv4.sysctl_udp_wmem_min,
1165 .maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min),
1166 .mode = 0644,
1167 .proc_handler = proc_dointvec_minmax,
1168 .extra1 = &one
1169 },
68528f09
PE		 1170 { }
1171};
1172
1577519d
PE		 1173static __net_init int ipv4_sysctl_init_net(struct net *net)
1174{
68528f09
PE		 1175 struct ctl_table *table;
1176
1177 table = ipv4_net_table;
09ad9bc7 1178 if (!net_eq(net, &init_net)) {
0a6fa23d
EB		 1179 int i;
1180
68528f09 1181 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
51456b29 1182 if (!table)
68528f09
PE		 1183 goto err_alloc;
1184
0a6fa23d
EB		 1185 /* Update the variables to point into the current struct net */
1186 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
1187 table[i].data += (void *)net - (void *)&init_net;
68528f09
PE		 1188 }
1189
ec8f23ce 1190 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
51456b29 1191 if (!net->ipv4.ipv4_hdr)
68528f09
PE		 1192 goto err_reg;
1193
122ff243
WC		 1194 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1195 if (!net->ipv4.sysctl_local_reserved_ports)
1196 goto err_ports;
1197
1577519d 1198 return 0;
68528f09 1199
122ff243
WC		 1200err_ports:
1201 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
68528f09 1202err_reg:
09ad9bc7 1203 if (!net_eq(net, &init_net))
68528f09
PE		 1204 kfree(table);
1205err_alloc:
1206 return -ENOMEM;
1577519d
PE		 1207}
1208
1209static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1210{
68528f09
PE		 1211 struct ctl_table *table;
1212
122ff243 1213 kfree(net->ipv4.sysctl_local_reserved_ports);
68528f09
PE		 1214 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1215 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1216 kfree(table);
1577519d
PE		 1217}
1218
1219static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1220 .init = ipv4_sysctl_init_net,
1221 .exit = ipv4_sysctl_exit_net,
1222};
1223
3e37c3f9
PE		 1224static __init int sysctl_ipv4_init(void)
1225{
1226 struct ctl_table_header *hdr;
1227
ec8f23ce 1228 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
51456b29 1229 if (!hdr)
1577519d
PE		 1230 return -ENOMEM;
1231
1232 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
5dd3df10 1233 unregister_net_sysctl_table(hdr);
1577519d
PE		 1234 return -ENOMEM;
1235 }
1236
1237 return 0;
3e37c3f9
PE		 1238}
1239
1240__initcall(sysctl_ipv4_init);
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