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tcp: add tcp_rx_skb_cache sysctl
[thirdparty/linux.git] / net / ipv4 / sysctl_net_ipv4.c
CommitLineData
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;
79e9fed4 33static int two = 2;
6ba8a3b1 34static int four = 4;
43e122b0 35static int thousand = 1000;
95bd09eb 36static int gso_max_segs = GSO_MAX_SEGS;
e905a9ed 37static int tcp_retr1_max = 255;
1da177e4
LT		 38static int ip_local_port_range_min[] = { 1, 1 };
39static int ip_local_port_range_max[] = { 65535, 65535 };
0147fc05
AD		 40static int tcp_adv_win_scale_min = -31;
41static int tcp_adv_win_scale_max = 31;
4548b683
KJ		 42static int ip_privileged_port_min;
43static int ip_privileged_port_max = 65535;
249fab77
ED		 44static int ip_ttl_min = 1;
45static int ip_ttl_max = 255;
651e9271
MT		 46static int tcp_syn_retries_min = 1;
47static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
c319b4d7
VK		 48static int ip_ping_group_range_min[] = { 0, 0 };
49static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
9c21d2fc 50static int comp_sack_nr_max = 255;
d4ce5808 51static u32 u32_max_div_HZ = UINT_MAX / HZ;
19fad20d 52static int one_day_secs = 24 * 3600;
1da177e4 53
ede61ca4
ED		 54DEFINE_STATIC_KEY_FALSE(tcp_rx_skb_cache_key);
55EXPORT_SYMBOL(tcp_rx_skb_cache_key);
56
b6690b14
FW		 57/* obsolete */
58static int sysctl_tcp_low_latency __read_mostly;
59
227b60f5 60/* Update system visible IP port range */
0bbf87d8 61static void set_local_port_range(struct net *net, int range[2])
227b60f5 62{
ed2dfd90
ED		 63 bool same_parity = !((range[0] ^ range[1]) & 1);
64
4ee3bd4a 65 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
ed2dfd90
ED		 66 if (same_parity && !net->ipv4.ip_local_ports.warned) {
67 net->ipv4.ip_local_ports.warned = true;
68 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
69 }
c9d8f1a6
CW		 70 net->ipv4.ip_local_ports.range[0] = range[0];
71 net->ipv4.ip_local_ports.range[1] = range[1];
4ee3bd4a 72 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
227b60f5
SH		 73}
74
75/* Validate changes from /proc interface. */
fe2c6338 76static int ipv4_local_port_range(struct ctl_table *table, int write,
227b60f5
SH		 77 void __user *buffer,
78 size_t *lenp, loff_t *ppos)
79{
0bbf87d8 80 struct net *net =
c9d8f1a6 81 container_of(table->data, struct net, ipv4.ip_local_ports.range);
227b60f5 82 int ret;
3c689b73 83 int range[2];
fe2c6338 84 struct ctl_table tmp = {
227b60f5
SH		 85 .data = &range,
86 .maxlen = sizeof(range),
87 .mode = table->mode,
88 .extra1 = &ip_local_port_range_min,
89 .extra2 = &ip_local_port_range_max,
90 };
91
0bbf87d8
EB		 92 inet_get_local_port_range(net, &range[0], &range[1]);
93
8d65af78 94 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
227b60f5
SH		 95
96 if (write && ret == 0) {
4548b683
KJ		 97 /* Ensure that the upper limit is not smaller than the lower,
98 * and that the lower does not encroach upon the privileged
99 * port limit.
100 */
101 if ((range[1] < range[0]) ||
102 (range[0] < net->ipv4.sysctl_ip_prot_sock))
227b60f5
SH		 103 ret = -EINVAL;
104 else
0bbf87d8 105 set_local_port_range(net, range);
227b60f5
SH		 106 }
107
108 return ret;
109}
110
4548b683
KJ		 111/* Validate changes from /proc interface. */
112static int ipv4_privileged_ports(struct ctl_table *table, int write,
113 void __user *buffer, size_t *lenp, loff_t *ppos)
114{
115 struct net *net = container_of(table->data, struct net,
116 ipv4.sysctl_ip_prot_sock);
117 int ret;
118 int pports;
119 int range[2];
120 struct ctl_table tmp = {
121 .data = &pports,
122 .maxlen = sizeof(pports),
123 .mode = table->mode,
124 .extra1 = &ip_privileged_port_min,
125 .extra2 = &ip_privileged_port_max,
126 };
127
128 pports = net->ipv4.sysctl_ip_prot_sock;
129
130 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
131
132 if (write && ret == 0) {
133 inet_get_local_port_range(net, &range[0], &range[1]);
134 /* Ensure that the local port range doesn't overlap with the
135 * privileged port range.
136 */
137 if (range[0] < pports)
138 ret = -EINVAL;
139 else
140 net->ipv4.sysctl_ip_prot_sock = pports;
141 }
142
143 return ret;
144}
c319b4d7 145
7064d16e 146static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
c319b4d7 147{
7064d16e 148 kgid_t *data = table->data;
0bbf87d8 149 struct net *net =
ba6b918a 150 container_of(table->data, struct net, ipv4.ping_group_range.range);
95c96174 151 unsigned int seq;
c319b4d7 152 do {
396a30cc 153 seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 154
155 *low = data[0];
156 *high = data[1];
396a30cc 157 } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
c319b4d7
VK		 158}
159
160/* Update system visible IP port range */
7064d16e 161static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
c319b4d7 162{
7064d16e 163 kgid_t *data = table->data;
0bbf87d8 164 struct net *net =
ba6b918a 165 container_of(table->data, struct net, ipv4.ping_group_range.range);
396a30cc 166 write_seqlock(&net->ipv4.ping_group_range.lock);
7064d16e
EB		 167 data[0] = low;
168 data[1] = high;
396a30cc 169 write_sequnlock(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 170}
171
172/* Validate changes from /proc interface. */
fe2c6338 173static int ipv4_ping_group_range(struct ctl_table *table, int write,
c319b4d7
VK		 174 void __user *buffer,
175 size_t *lenp, loff_t *ppos)
176{
7064d16e 177 struct user_namespace *user_ns = current_user_ns();
c319b4d7 178 int ret;
7064d16e
EB		 179 gid_t urange[2];
180 kgid_t low, high;
fe2c6338 181 struct ctl_table tmp = {
7064d16e
EB		 182 .data = &urange,
183 .maxlen = sizeof(urange),
c319b4d7
VK		 184 .mode = table->mode,
185 .extra1 = &ip_ping_group_range_min,
186 .extra2 = &ip_ping_group_range_max,
187 };
188
7064d16e
EB		 189 inet_get_ping_group_range_table(table, &low, &high);
190 urange[0] = from_kgid_munged(user_ns, low);
191 urange[1] = from_kgid_munged(user_ns, high);
c319b4d7
VK		 192 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
193
7064d16e
EB		 194 if (write && ret == 0) {
195 low = make_kgid(user_ns, urange[0]);
196 high = make_kgid(user_ns, urange[1]);
70ba5b6d
TH		 197 if (!gid_valid(low) || !gid_valid(high))
198 return -EINVAL;
199 if (urange[1] < urange[0] || gid_lt(high, low)) {
7064d16e
EB		 200 low = make_kgid(&init_user_ns, 1);
201 high = make_kgid(&init_user_ns, 0);
202 }
203 set_ping_group_range(table, low, high);
204 }
c319b4d7
VK		 205
206 return ret;
207}
208
d18c5d19
PM		 209static int ipv4_fwd_update_priority(struct ctl_table *table, int write,
210 void __user *buffer,
211 size_t *lenp, loff_t *ppos)
212{
213 struct net *net;
214 int ret;
215
216 net = container_of(table->data, struct net,
217 ipv4.sysctl_ip_fwd_update_priority);
218 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
219 if (write && ret == 0)
220 call_netevent_notifiers(NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE,
221 net);
222
223 return ret;
224}
225
fe2c6338 226static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
317a76f9
SH		 227 void __user *buffer, size_t *lenp, loff_t *ppos)
228{
6670e152
SH		 229 struct net *net = container_of(ctl->data, struct net,
230 ipv4.tcp_congestion_control);
317a76f9 231 char val[TCP_CA_NAME_MAX];
fe2c6338 232 struct ctl_table tbl = {
317a76f9
SH		 233 .data = val,
234 .maxlen = TCP_CA_NAME_MAX,
235 };
236 int ret;
237
6670e152 238 tcp_get_default_congestion_control(net, val);
317a76f9 239
8d65af78 240 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
317a76f9 241 if (write && ret == 0)
6670e152 242 ret = tcp_set_default_congestion_control(net, val);
317a76f9
SH		 243 return ret;
244}
245
fe2c6338 246static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
8d65af78 247 int write,
3ff825b2
SH		 248 void __user *buffer, size_t *lenp,
249 loff_t *ppos)
250{
fe2c6338 251 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
3ff825b2
SH		 252 int ret;
253
254 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
255 if (!tbl.data)
256 return -ENOMEM;
257 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
8d65af78 258 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
3ff825b2
SH		 259 kfree(tbl.data);
260 return ret;
261}
262
fe2c6338 263static int proc_allowed_congestion_control(struct ctl_table *ctl,
8d65af78 264 int write,
ce7bc3bf
SH		 265 void __user *buffer, size_t *lenp,
266 loff_t *ppos)
267{
fe2c6338 268 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
ce7bc3bf
SH		 269 int ret;
270
271 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
272 if (!tbl.data)
273 return -ENOMEM;
274
275 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
8d65af78 276 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ce7bc3bf
SH		 277 if (write && ret == 0)
278 ret = tcp_set_allowed_congestion_control(tbl.data);
279 kfree(tbl.data);
280 return ret;
281}
282
43713848 283static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
fe2c6338
JP		 284 void __user *buffer, size_t *lenp,
285 loff_t *ppos)
10467163 286{
43713848
HY		 287 struct net *net = container_of(table->data, struct net,
288 ipv4.sysctl_tcp_fastopen);
fe2c6338 289 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
10467163 290 struct tcp_fastopen_context *ctxt;
10467163 291 u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
c860e997
YC		 292 __le32 key[4];
293 int ret, i;
10467163
JC		 294
295 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
296 if (!tbl.data)
297 return -ENOMEM;
298
299 rcu_read_lock();
43713848 300 ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx);
10467163 301 if (ctxt)
c860e997 302 memcpy(key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
0e24c4fc 303 else
c860e997 304 memset(key, 0, sizeof(key));
10467163
JC		 305 rcu_read_unlock();
306
c860e997
YC		 307 for (i = 0; i < ARRAY_SIZE(key); i++)
308 user_key[i] = le32_to_cpu(key[i]);
309
10467163
JC		 310 snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
311 user_key[0], user_key[1], user_key[2], user_key[3]);
312 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
313
314 if (write && ret == 0) {
315 if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
316 user_key + 2, user_key + 3) != 4) {
317 ret = -EINVAL;
318 goto bad_key;
319 }
c860e997
YC		 320
321 for (i = 0; i < ARRAY_SIZE(user_key); i++)
322 key[i] = cpu_to_le32(user_key[i]);
323
324 tcp_fastopen_reset_cipher(net, NULL, key,
1fba70e5 325 TCP_FASTOPEN_KEY_LENGTH);
10467163
JC		 326 }
327
328bad_key:
329 pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
c860e997 330 user_key[0], user_key[1], user_key[2], user_key[3],
10467163
JC		 331 (char *)tbl.data, ret);
332 kfree(tbl.data);
333 return ret;
334}
335
dddb64bc
SAK		 336static void proc_configure_early_demux(int enabled, int protocol)
337{
338 struct net_protocol *ipprot;
339#if IS_ENABLED(CONFIG_IPV6)
340 struct inet6_protocol *ip6prot;
341#endif
342
58c4c6a3
DA		 343 rcu_read_lock();
344
dddb64bc
SAK		 345 ipprot = rcu_dereference(inet_protos[protocol]);
346 if (ipprot)
347 ipprot->early_demux = enabled ? ipprot->early_demux_handler :
348 NULL;
349
350#if IS_ENABLED(CONFIG_IPV6)
351 ip6prot = rcu_dereference(inet6_protos[protocol]);
352 if (ip6prot)
353 ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
354 NULL;
355#endif
58c4c6a3 356 rcu_read_unlock();
dddb64bc
SAK		 357}
358
359static int proc_tcp_early_demux(struct ctl_table *table, int write,
360 void __user *buffer, size_t *lenp, loff_t *ppos)
361{
362 int ret = 0;
363
364 ret = proc_dointvec(table, write, buffer, lenp, ppos);
365
366 if (write && !ret) {
367 int enabled = init_net.ipv4.sysctl_tcp_early_demux;
368
369 proc_configure_early_demux(enabled, IPPROTO_TCP);
370 }
371
372 return ret;
373}
374
375static int proc_udp_early_demux(struct ctl_table *table, int write,
376 void __user *buffer, size_t *lenp, loff_t *ppos)
377{
378 int ret = 0;
379
380 ret = proc_dointvec(table, write, buffer, lenp, ppos);
381
382 if (write && !ret) {
383 int enabled = init_net.ipv4.sysctl_udp_early_demux;
384
385 proc_configure_early_demux(enabled, IPPROTO_UDP);
386 }
387
388 return ret;
389}
390
cf1ef3f0
WW		 391static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table,
392 int write,
393 void __user *buffer,
394 size_t *lenp, loff_t *ppos)
395{
3733be14
HY		 396 struct net *net = container_of(table->data, struct net,
397 ipv4.sysctl_tcp_fastopen_blackhole_timeout);
cf1ef3f0
WW		 398 int ret;
399
400 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
401 if (write && ret == 0)
3733be14 402 atomic_set(&net->ipv4.tfo_active_disable_times, 0);
734942cc
DW		 403
404 return ret;
405}
406
407static int proc_tcp_available_ulp(struct ctl_table *ctl,
408 int write,
409 void __user *buffer, size_t *lenp,
410 loff_t *ppos)
411{
412 struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
413 int ret;
414
415 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
416 if (!tbl.data)
417 return -ENOMEM;
418 tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
419 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
420 kfree(tbl.data);
421
cf1ef3f0
WW		 422 return ret;
423}
424
3ae6ec08
IS		 425#ifdef CONFIG_IP_ROUTE_MULTIPATH
426static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write,
427 void __user *buffer, size_t *lenp,
428 loff_t *ppos)
429{
430 struct net *net = container_of(table->data, struct net,
431 ipv4.sysctl_fib_multipath_hash_policy);
432 int ret;
433
434 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
435 if (write && ret == 0)
3192dac6 436 call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net);
3ae6ec08
IS		 437
438 return ret;
439}
440#endif
441
3e37c3f9 442static struct ctl_table ipv4_table[] = {
1da177e4 443 {
1da177e4
LT		 444 .procname = "tcp_max_orphans",
445 .data = &sysctl_tcp_max_orphans,
446 .maxlen = sizeof(int),
447 .mode = 0644,
6d9f239a 448 .proc_handler = proc_dointvec
1da177e4 449 },
1da177e4 450 {
1da177e4
LT		 451 .procname = "inet_peer_threshold",
452 .data = &inet_peer_threshold,
453 .maxlen = sizeof(int),
454 .mode = 0644,
6d9f239a 455 .proc_handler = proc_dointvec
1da177e4
LT		 456 },
457 {
1da177e4
LT		 458 .procname = "inet_peer_minttl",
459 .data = &inet_peer_minttl,
460 .maxlen = sizeof(int),
461 .mode = 0644,
6d9f239a 462 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 463 },
464 {
1da177e4
LT		 465 .procname = "inet_peer_maxttl",
466 .data = &inet_peer_maxttl,
467 .maxlen = sizeof(int),
468 .mode = 0644,
6d9f239a 469 .proc_handler = proc_dointvec_jiffies,
1da177e4 470 },
a4fe34bf
EB		 471 {
472 .procname = "tcp_mem",
473 .maxlen = sizeof(sysctl_tcp_mem),
474 .data = &sysctl_tcp_mem,
475 .mode = 0644,
476 .proc_handler = proc_doulongvec_minmax,
477 },
1da177e4 478 {
1da177e4
LT		 479 .procname = "tcp_low_latency",
480 .data = &sysctl_tcp_low_latency,
481 .maxlen = sizeof(int),
482 .mode = 0644,
6d9f239a 483 .proc_handler = proc_dointvec
1da177e4 484 },
446fda4f
PM		 485#ifdef CONFIG_NETLABEL
486 {
446fda4f
PM		 487 .procname = "cipso_cache_enable",
488 .data = &cipso_v4_cache_enabled,
489 .maxlen = sizeof(int),
490 .mode = 0644,
6d9f239a 491 .proc_handler = proc_dointvec,
446fda4f
PM		 492 },
493 {
446fda4f
PM		 494 .procname = "cipso_cache_bucket_size",
495 .data = &cipso_v4_cache_bucketsize,
496 .maxlen = sizeof(int),
497 .mode = 0644,
6d9f239a 498 .proc_handler = proc_dointvec,
446fda4f
PM		 499 },
500 {
446fda4f
PM		 501 .procname = "cipso_rbm_optfmt",
502 .data = &cipso_v4_rbm_optfmt,
503 .maxlen = sizeof(int),
504 .mode = 0644,
6d9f239a 505 .proc_handler = proc_dointvec,
446fda4f
PM		 506 },
507 {
446fda4f
PM		 508 .procname = "cipso_rbm_strictvalid",
509 .data = &cipso_v4_rbm_strictvalid,
510 .maxlen = sizeof(int),
511 .mode = 0644,
6d9f239a 512 .proc_handler = proc_dointvec,
446fda4f
PM		 513 },
514#endif /* CONFIG_NETLABEL */
3ff825b2 515 {
3ff825b2
SH		 516 .procname = "tcp_available_congestion_control",
517 .maxlen = TCP_CA_BUF_MAX,
518 .mode = 0444,
6d9f239a 519 .proc_handler = proc_tcp_available_congestion_control,
3ff825b2 520 },
ce7bc3bf 521 {
ce7bc3bf
SH		 522 .procname = "tcp_allowed_congestion_control",
523 .maxlen = TCP_CA_BUF_MAX,
524 .mode = 0644,
6d9f239a 525 .proc_handler = proc_allowed_congestion_control,
ce7bc3bf 526 },
734942cc
DW		 527 {
528 .procname = "tcp_available_ulp",
529 .maxlen = TCP_ULP_BUF_MAX,
530 .mode = 0444,
531 .proc_handler = proc_tcp_available_ulp,
532 },
4cdf507d
ED		 533 {
534 .procname = "icmp_msgs_per_sec",
535 .data = &sysctl_icmp_msgs_per_sec,
536 .maxlen = sizeof(int),
537 .mode = 0644,
538 .proc_handler = proc_dointvec_minmax,
539 .extra1 = &zero,
540 },
541 {
542 .procname = "icmp_msgs_burst",
543 .data = &sysctl_icmp_msgs_burst,
544 .maxlen = sizeof(int),
545 .mode = 0644,
546 .proc_handler = proc_dointvec_minmax,
547 .extra1 = &zero,
548 },
95766fff 549 {
95766fff
HA		 550 .procname = "udp_mem",
551 .data = &sysctl_udp_mem,
552 .maxlen = sizeof(sysctl_udp_mem),
553 .mode = 0644,
8d987e5c 554 .proc_handler = proc_doulongvec_minmax,
95766fff 555 },
9ab948a9
DA		 556 {
557 .procname = "fib_sync_mem",
558 .data = &sysctl_fib_sync_mem,
559 .maxlen = sizeof(sysctl_fib_sync_mem),
560 .mode = 0644,
561 .proc_handler = proc_douintvec_minmax,
562 .extra1 = &sysctl_fib_sync_mem_min,
563 .extra2 = &sysctl_fib_sync_mem_max,
564 },
ede61ca4
ED		 565 {
566 .procname = "tcp_rx_skb_cache",
567 .data = &tcp_rx_skb_cache_key.key,
568 .mode = 0644,
569 .proc_handler = proc_do_static_key,
570 },
f8572d8f 571 { }
1da177e4 572};
3e37c3f9 573
68528f09
PE		 574static struct ctl_table ipv4_net_table[] = {
575 {
68528f09
PE		 576 .procname = "icmp_echo_ignore_all",
577 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
578 .maxlen = sizeof(int),
579 .mode = 0644,
6d9f239a 580 .proc_handler = proc_dointvec
68528f09
PE		 581 },
582 {
68528f09
PE		 583 .procname = "icmp_echo_ignore_broadcasts",
584 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
585 .maxlen = sizeof(int),
586 .mode = 0644,
6d9f239a 587 .proc_handler = proc_dointvec
68528f09
PE		 588 },
589 {
68528f09
PE		 590 .procname = "icmp_ignore_bogus_error_responses",
591 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
592 .maxlen = sizeof(int),
593 .mode = 0644,
6d9f239a 594 .proc_handler = proc_dointvec
68528f09
PE		 595 },
596 {
68528f09
PE		 597 .procname = "icmp_errors_use_inbound_ifaddr",
598 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
599 .maxlen = sizeof(int),
600 .mode = 0644,
6d9f239a 601 .proc_handler = proc_dointvec
68528f09
PE		 602 },
603 {
68528f09
PE		 604 .procname = "icmp_ratelimit",
605 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
606 .maxlen = sizeof(int),
607 .mode = 0644,
6d9f239a 608 .proc_handler = proc_dointvec_ms_jiffies,
68528f09
PE		 609 },
610 {
68528f09
PE		 611 .procname = "icmp_ratemask",
612 .data = &init_net.ipv4.sysctl_icmp_ratemask,
613 .maxlen = sizeof(int),
614 .mode = 0644,
6d9f239a 615 .proc_handler = proc_dointvec
68528f09 616 },
c319b4d7
VK		 617 {
618 .procname = "ping_group_range",
ba6b918a 619 .data = &init_net.ipv4.ping_group_range.range,
7064d16e 620 .maxlen = sizeof(gid_t)*2,
c319b4d7
VK		 621 .mode = 0644,
622 .proc_handler = ipv4_ping_group_range,
623 },
6897445f
MM		 624#ifdef CONFIG_NET_L3_MASTER_DEV
625 {
626 .procname = "raw_l3mdev_accept",
627 .data = &init_net.ipv4.sysctl_raw_l3mdev_accept,
628 .maxlen = sizeof(int),
629 .mode = 0644,
630 .proc_handler = proc_dointvec_minmax,
631 .extra1 = &zero,
632 .extra2 = &one,
633 },
634#endif
5d134f1c
HFS		 635 {
636 .procname = "tcp_ecn",
637 .data = &init_net.ipv4.sysctl_tcp_ecn,
638 .maxlen = sizeof(int),
639 .mode = 0644,
640 .proc_handler = proc_dointvec
641 },
49213555
DB		 642 {
643 .procname = "tcp_ecn_fallback",
644 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
645 .maxlen = sizeof(int),
646 .mode = 0644,
647 .proc_handler = proc_dointvec
648 },
287b7f38
NB		 649 {
650 .procname = "ip_dynaddr",
651 .data = &init_net.ipv4.sysctl_ip_dynaddr,
652 .maxlen = sizeof(int),
653 .mode = 0644,
654 .proc_handler = proc_dointvec
655 },
e21145a9
NB		 656 {
657 .procname = "ip_early_demux",
658 .data = &init_net.ipv4.sysctl_ip_early_demux,
659 .maxlen = sizeof(int),
660 .mode = 0644,
661 .proc_handler = proc_dointvec
662 },
dddb64bc
SAK		 663 {
664 .procname = "udp_early_demux",
665 .data = &init_net.ipv4.sysctl_udp_early_demux,
666 .maxlen = sizeof(int),
667 .mode = 0644,
668 .proc_handler = proc_udp_early_demux
669 },
670 {
671 .procname = "tcp_early_demux",
672 .data = &init_net.ipv4.sysctl_tcp_early_demux,
673 .maxlen = sizeof(int),
674 .mode = 0644,
675 .proc_handler = proc_tcp_early_demux
676 },
fa50d974
NB		 677 {
678 .procname = "ip_default_ttl",
679 .data = &init_net.ipv4.sysctl_ip_default_ttl,
680 .maxlen = sizeof(int),
681 .mode = 0644,
682 .proc_handler = proc_dointvec_minmax,
683 .extra1 = &ip_ttl_min,
684 .extra2 = &ip_ttl_max,
685 },
0bbf87d8
EB		 686 {
687 .procname = "ip_local_port_range",
c9d8f1a6
CW		 688 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
689 .data = &init_net.ipv4.ip_local_ports.range,
0bbf87d8
EB		 690 .mode = 0644,
691 .proc_handler = ipv4_local_port_range,
692 },
122ff243
WC		 693 {
694 .procname = "ip_local_reserved_ports",
695 .data = &init_net.ipv4.sysctl_local_reserved_ports,
696 .maxlen = 65536,
697 .mode = 0644,
698 .proc_handler = proc_do_large_bitmap,
699 },
974eda11
HFS		 700 {
701 .procname = "ip_no_pmtu_disc",
702 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
703 .maxlen = sizeof(int),
704 .mode = 0644,
705 .proc_handler = proc_dointvec
706 },
f87c10a8
HFS		 707 {
708 .procname = "ip_forward_use_pmtu",
709 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
710 .maxlen = sizeof(int),
711 .mode = 0644,
712 .proc_handler = proc_dointvec,
713 },
432e05d3
PM		 714 {
715 .procname = "ip_forward_update_priority",
716 .data = &init_net.ipv4.sysctl_ip_fwd_update_priority,
717 .maxlen = sizeof(int),
718 .mode = 0644,
d18c5d19 719 .proc_handler = ipv4_fwd_update_priority,
432e05d3
PM		 720 .extra1 = &zero,
721 .extra2 = &one,
722 },
49a60158
VB		 723 {
724 .procname = "ip_nonlocal_bind",
725 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
726 .maxlen = sizeof(int),
727 .mode = 0644,
728 .proc_handler = proc_dointvec
729 },
e110861f
LC		 730 {
731 .procname = "fwmark_reflect",
732 .data = &init_net.ipv4.sysctl_fwmark_reflect,
733 .maxlen = sizeof(int),
734 .mode = 0644,
735 .proc_handler = proc_dointvec,
736 },
84f39b08
LC		 737 {
738 .procname = "tcp_fwmark_accept",
739 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
740 .maxlen = sizeof(int),
741 .mode = 0644,
742 .proc_handler = proc_dointvec,
743 },
6dd9a14e
DA		 744#ifdef CONFIG_NET_L3_MASTER_DEV
745 {
746 .procname = "tcp_l3mdev_accept",
747 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
748 .maxlen = sizeof(int),
749 .mode = 0644,
750 .proc_handler = proc_dointvec_minmax,
751 .extra1 = &zero,
752 .extra2 = &one,
753 },
754#endif
b0f9ca53
FD		 755 {
756 .procname = "tcp_mtu_probing",
757 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
758 .maxlen = sizeof(int),
759 .mode = 0644,
760 .proc_handler = proc_dointvec,
761 },
762 {
763 .procname = "tcp_base_mss",
764 .data = &init_net.ipv4.sysctl_tcp_base_mss,
765 .maxlen = sizeof(int),
766 .mode = 0644,
767 .proc_handler = proc_dointvec,
768 },
6b58e0a5
FD		 769 {
770 .procname = "tcp_probe_threshold",
771 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
772 .maxlen = sizeof(int),
773 .mode = 0644,
774 .proc_handler = proc_dointvec,
775 },
05cbc0db
FD		 776 {
777 .procname = "tcp_probe_interval",
778 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
d4ce5808 779 .maxlen = sizeof(u32),
05cbc0db 780 .mode = 0644,
d4ce5808
MŻ		 781 .proc_handler = proc_douintvec_minmax,
782 .extra2 = &u32_max_div_HZ,
05cbc0db 783 },
df2cf4a7
PD		 784 {
785 .procname = "igmp_link_local_mcast_reports",
87a8a2ae 786 .data = &init_net.ipv4.sysctl_igmp_llm_reports,
df2cf4a7
PD		 787 .maxlen = sizeof(int),
788 .mode = 0644,
789 .proc_handler = proc_dointvec
790 },
815c5270
NB		 791 {
792 .procname = "igmp_max_memberships",
793 .data = &init_net.ipv4.sysctl_igmp_max_memberships,
794 .maxlen = sizeof(int),
795 .mode = 0644,
796 .proc_handler = proc_dointvec
797 },
166b6b2d
NB		 798 {
799 .procname = "igmp_max_msf",
800 .data = &init_net.ipv4.sysctl_igmp_max_msf,
801 .maxlen = sizeof(int),
802 .mode = 0644,
803 .proc_handler = proc_dointvec
804 },
165094af
NB		 805#ifdef CONFIG_IP_MULTICAST
806 {
807 .procname = "igmp_qrv",
808 .data = &init_net.ipv4.sysctl_igmp_qrv,
809 .maxlen = sizeof(int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec_minmax,
812 .extra1 = &one
813 },
814#endif
6670e152
SH		 815 {
816 .procname = "tcp_congestion_control",
817 .data = &init_net.ipv4.tcp_congestion_control,
818 .mode = 0644,
819 .maxlen = TCP_CA_NAME_MAX,
820 .proc_handler = proc_tcp_congestion_control,
821 },
13b287e8
NB		 822 {
823 .procname = "tcp_keepalive_time",
824 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
825 .maxlen = sizeof(int),
826 .mode = 0644,
827 .proc_handler = proc_dointvec_jiffies,
828 },
9bd6861b
NB		 829 {
830 .procname = "tcp_keepalive_probes",
831 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
832 .maxlen = sizeof(int),
833 .mode = 0644,
834 .proc_handler = proc_dointvec
835 },
b840d15d
NB		 836 {
837 .procname = "tcp_keepalive_intvl",
838 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
839 .maxlen = sizeof(int),
840 .mode = 0644,
841 .proc_handler = proc_dointvec_jiffies,
842 },
6fa25166
NB		 843 {
844 .procname = "tcp_syn_retries",
845 .data = &init_net.ipv4.sysctl_tcp_syn_retries,
846 .maxlen = sizeof(int),
847 .mode = 0644,
848 .proc_handler = proc_dointvec_minmax,
849 .extra1 = &tcp_syn_retries_min,
850 .extra2 = &tcp_syn_retries_max
851 },
7c083ecb
NB		 852 {
853 .procname = "tcp_synack_retries",
854 .data = &init_net.ipv4.sysctl_tcp_synack_retries,
855 .maxlen = sizeof(int),
856 .mode = 0644,
857 .proc_handler = proc_dointvec
858 },
12ed8244
NB		 859#ifdef CONFIG_SYN_COOKIES
860 {
861 .procname = "tcp_syncookies",
862 .data = &init_net.ipv4.sysctl_tcp_syncookies,
863 .maxlen = sizeof(int),
864 .mode = 0644,
865 .proc_handler = proc_dointvec
866 },
867#endif
1043e25f
NB		 868 {
869 .procname = "tcp_reordering",
870 .data = &init_net.ipv4.sysctl_tcp_reordering,
871 .maxlen = sizeof(int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec
874 },
ae5c3f40
NB		 875 {
876 .procname = "tcp_retries1",
877 .data = &init_net.ipv4.sysctl_tcp_retries1,
878 .maxlen = sizeof(int),
879 .mode = 0644,
880 .proc_handler = proc_dointvec_minmax,
881 .extra2 = &tcp_retr1_max
882 },
c6214a97
NB		 883 {
884 .procname = "tcp_retries2",
885 .data = &init_net.ipv4.sysctl_tcp_retries2,
886 .maxlen = sizeof(int),
887 .mode = 0644,
888 .proc_handler = proc_dointvec
889 },
c402d9be
NB		 890 {
891 .procname = "tcp_orphan_retries",
892 .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
893 .maxlen = sizeof(int),
894 .mode = 0644,
895 .proc_handler = proc_dointvec
896 },
1e579caa
NB		 897 {
898 .procname = "tcp_fin_timeout",
899 .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
900 .maxlen = sizeof(int),
901 .mode = 0644,
902 .proc_handler = proc_dointvec_jiffies,
903 },
4979f2d9
NB		 904 {
905 .procname = "tcp_notsent_lowat",
906 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
907 .maxlen = sizeof(unsigned int),
908 .mode = 0644,
b007f090 909 .proc_handler = proc_douintvec,
4979f2d9 910 },
56ab6b93
HY		 911 {
912 .procname = "tcp_tw_reuse",
913 .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
914 .maxlen = sizeof(int),
915 .mode = 0644,
79e9fed4
MŻ		 916 .proc_handler = proc_dointvec_minmax,
917 .extra1 = &zero,
918 .extra2 = &two,
56ab6b93 919 },
1946e672
HY		 920 {
921 .procname = "tcp_max_tw_buckets",
922 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
923 .maxlen = sizeof(int),
924 .mode = 0644,
925 .proc_handler = proc_dointvec
926 },
fee83d09
HY		 927 {
928 .procname = "tcp_max_syn_backlog",
929 .data = &init_net.ipv4.sysctl_max_syn_backlog,
930 .maxlen = sizeof(int),
931 .mode = 0644,
932 .proc_handler = proc_dointvec
933 },
e1cfcbe8
HY		 934 {
935 .procname = "tcp_fastopen",
936 .data = &init_net.ipv4.sysctl_tcp_fastopen,
937 .maxlen = sizeof(int),
938 .mode = 0644,
939 .proc_handler = proc_dointvec,
940 },
43713848
HY		 941 {
942 .procname = "tcp_fastopen_key",
943 .mode = 0600,
944 .data = &init_net.ipv4.sysctl_tcp_fastopen,
945 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
946 .proc_handler = proc_tcp_fastopen_key,
947 },
3733be14
HY		 948 {
949 .procname = "tcp_fastopen_blackhole_timeout_sec",
950 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
951 .maxlen = sizeof(int),
952 .mode = 0644,
953 .proc_handler = proc_tfo_blackhole_detect_timeout,
954 .extra1 = &zero,
955 },
a6db4494
DA		 956#ifdef CONFIG_IP_ROUTE_MULTIPATH
957 {
958 .procname = "fib_multipath_use_neigh",
959 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
960 .maxlen = sizeof(int),
961 .mode = 0644,
962 .proc_handler = proc_dointvec_minmax,
bf4e0a3d
NA		 963 .extra1 = &zero,
964 .extra2 = &one,
965 },
966 {
967 .procname = "fib_multipath_hash_policy",
968 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
969 .maxlen = sizeof(int),
970 .mode = 0644,
3ae6ec08 971 .proc_handler = proc_fib_multipath_hash_policy,
a6db4494
DA		 972 .extra1 = &zero,
973 .extra2 = &one,
974 },
975#endif
4548b683
KJ		 976 {
977 .procname = "ip_unprivileged_port_start",
978 .maxlen = sizeof(int),
979 .data = &init_net.ipv4.sysctl_ip_prot_sock,
980 .mode = 0644,
981 .proc_handler = ipv4_privileged_ports,
982 },
63a6fff3
RS		 983#ifdef CONFIG_NET_L3_MASTER_DEV
984 {
985 .procname = "udp_l3mdev_accept",
986 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
987 .maxlen = sizeof(int),
988 .mode = 0644,
989 .proc_handler = proc_dointvec_minmax,
990 .extra1 = &zero,
991 .extra2 = &one,
992 },
993#endif
f9301034
ED		 994 {
995 .procname = "tcp_sack",
996 .data = &init_net.ipv4.sysctl_tcp_sack,
997 .maxlen = sizeof(int),
998 .mode = 0644,
999 .proc_handler = proc_dointvec
1000 },
9bb37ef0
ED		 1001 {
1002 .procname = "tcp_window_scaling",
1003 .data = &init_net.ipv4.sysctl_tcp_window_scaling,
1004 .maxlen = sizeof(int),
1005 .mode = 0644,
1006 .proc_handler = proc_dointvec
1007 },
5d2ed052
ED		 1008 {
1009 .procname = "tcp_timestamps",
1010 .data = &init_net.ipv4.sysctl_tcp_timestamps,
1011 .maxlen = sizeof(int),
1012 .mode = 0644,
1013 .proc_handler = proc_dointvec
1014 },
2ae21cf5
ED		 1015 {
1016 .procname = "tcp_early_retrans",
1017 .data = &init_net.ipv4.sysctl_tcp_early_retrans,
1018 .maxlen = sizeof(int),
1019 .mode = 0644,
1020 .proc_handler = proc_dointvec_minmax,
1021 .extra1 = &zero,
1022 .extra2 = &four,
1023 },
e20223f1
ED		 1024 {
1025 .procname = "tcp_recovery",
1026 .data = &init_net.ipv4.sysctl_tcp_recovery,
1027 .maxlen = sizeof(int),
1028 .mode = 0644,
1029 .proc_handler = proc_dointvec,
1030 },
2c04ac8a
ED		 1031 {
1032 .procname = "tcp_thin_linear_timeouts",
1033 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
1034 .maxlen = sizeof(int),
1035 .mode = 0644,
1036 .proc_handler = proc_dointvec
1037 },
b510f0d2
ED		 1038 {
1039 .procname = "tcp_slow_start_after_idle",
1040 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
1041 .maxlen = sizeof(int),
1042 .mode = 0644,
1043 .proc_handler = proc_dointvec
1044 },
e0a1e5b5
ED		 1045 {
1046 .procname = "tcp_retrans_collapse",
1047 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
1048 .maxlen = sizeof(int),
1049 .mode = 0644,
1050 .proc_handler = proc_dointvec
1051 },
3f4c7c6f
ED		 1052 {
1053 .procname = "tcp_stdurg",
1054 .data = &init_net.ipv4.sysctl_tcp_stdurg,
1055 .maxlen = sizeof(int),
1056 .mode = 0644,
1057 .proc_handler = proc_dointvec
1058 },
625357aa
ED		 1059 {
1060 .procname = "tcp_rfc1337",
1061 .data = &init_net.ipv4.sysctl_tcp_rfc1337,
1062 .maxlen = sizeof(int),
1063 .mode = 0644,
1064 .proc_handler = proc_dointvec
1065 },
65c9410c
ED		 1066 {
1067 .procname = "tcp_abort_on_overflow",
1068 .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
1069 .maxlen = sizeof(int),
1070 .mode = 0644,
1071 .proc_handler = proc_dointvec
1072 },
0bc65a28
ED		 1073 {
1074 .procname = "tcp_fack",
1075 .data = &init_net.ipv4.sysctl_tcp_fack,
1076 .maxlen = sizeof(int),
1077 .mode = 0644,
1078 .proc_handler = proc_dointvec
1079 },
c6e21803
ED		 1080 {
1081 .procname = "tcp_max_reordering",
1082 .data = &init_net.ipv4.sysctl_tcp_max_reordering,
1083 .maxlen = sizeof(int),
1084 .mode = 0644,
1085 .proc_handler = proc_dointvec
1086 },
6496f6bd
ED		 1087 {
1088 .procname = "tcp_dsack",
1089 .data = &init_net.ipv4.sysctl_tcp_dsack,
1090 .maxlen = sizeof(int),
1091 .mode = 0644,
1092 .proc_handler = proc_dointvec
1093 },
0c12654a
ED		 1094 {
1095 .procname = "tcp_app_win",
1096 .data = &init_net.ipv4.sysctl_tcp_app_win,
1097 .maxlen = sizeof(int),
1098 .mode = 0644,
1099 .proc_handler = proc_dointvec
1100 },
94f0893e
ED		 1101 {
1102 .procname = "tcp_adv_win_scale",
1103 .data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
1104 .maxlen = sizeof(int),
1105 .mode = 0644,
1106 .proc_handler = proc_dointvec_minmax,
1107 .extra1 = &tcp_adv_win_scale_min,
1108 .extra2 = &tcp_adv_win_scale_max,
1109 },
af9b69a7
ED		 1110 {
1111 .procname = "tcp_frto",
1112 .data = &init_net.ipv4.sysctl_tcp_frto,
1113 .maxlen = sizeof(int),
1114 .mode = 0644,
1115 .proc_handler = proc_dointvec
1116 },
ec36e416
ED		 1117 {
1118 .procname = "tcp_no_metrics_save",
1119 .data = &init_net.ipv4.sysctl_tcp_nometrics_save,
1120 .maxlen = sizeof(int),
1121 .mode = 0644,
1122 .proc_handler = proc_dointvec,
1123 },
4540c0cf
ED		 1124 {
1125 .procname = "tcp_moderate_rcvbuf",
1126 .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
1127 .maxlen = sizeof(int),
1128 .mode = 0644,
1129 .proc_handler = proc_dointvec,
1130 },
d06a9904
ED		 1131 {
1132 .procname = "tcp_tso_win_divisor",
1133 .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
1134 .maxlen = sizeof(int),
1135 .mode = 0644,
1136 .proc_handler = proc_dointvec,
1137 },
ceef9ab6
ED		 1138 {
1139 .procname = "tcp_workaround_signed_windows",
1140 .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
1141 .maxlen = sizeof(int),
1142 .mode = 0644,
1143 .proc_handler = proc_dointvec
1144 },
9184d8bb
ED		 1145 {
1146 .procname = "tcp_limit_output_bytes",
1147 .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
1148 .maxlen = sizeof(int),
1149 .mode = 0644,
1150 .proc_handler = proc_dointvec
1151 },
b530b681
ED		 1152 {
1153 .procname = "tcp_challenge_ack_limit",
1154 .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit,
1155 .maxlen = sizeof(int),
1156 .mode = 0644,
1157 .proc_handler = proc_dointvec
1158 },
26e9596e
ED		 1159 {
1160 .procname = "tcp_min_tso_segs",
1161 .data = &init_net.ipv4.sysctl_tcp_min_tso_segs,
1162 .maxlen = sizeof(int),
1163 .mode = 0644,
1164 .proc_handler = proc_dointvec_minmax,
1165 .extra1 = &one,
1166 .extra2 = &gso_max_segs,
1167 },
bd239704
ED		 1168 {
1169 .procname = "tcp_min_rtt_wlen",
1170 .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
1171 .maxlen = sizeof(int),
1172 .mode = 0644,
19fad20d
Z		 1173 .proc_handler = proc_dointvec_minmax,
1174 .extra1 = &zero,
1175 .extra2 = &one_day_secs
bd239704 1176 },
790f00e1
ED		 1177 {
1178 .procname = "tcp_autocorking",
1179 .data = &init_net.ipv4.sysctl_tcp_autocorking,
1180 .maxlen = sizeof(int),
1181 .mode = 0644,
1182 .proc_handler = proc_dointvec_minmax,
1183 .extra1 = &zero,
1184 .extra2 = &one,
1185 },
4170ba6b
ED		 1186 {
1187 .procname = "tcp_invalid_ratelimit",
1188 .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit,
1189 .maxlen = sizeof(int),
1190 .mode = 0644,
1191 .proc_handler = proc_dointvec_ms_jiffies,
1192 },
23a7102a
ED		 1193 {
1194 .procname = "tcp_pacing_ss_ratio",
1195 .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,
1196 .maxlen = sizeof(int),
1197 .mode = 0644,
1198 .proc_handler = proc_dointvec_minmax,
1199 .extra1 = &zero,
1200 .extra2 = &thousand,
1201 },
c26e91f8
ED		 1202 {
1203 .procname = "tcp_pacing_ca_ratio",
1204 .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio,
1205 .maxlen = sizeof(int),
1206 .mode = 0644,
1207 .proc_handler = proc_dointvec_minmax,
1208 .extra1 = &zero,
1209 .extra2 = &thousand,
1210 },
356d1833
ED		 1211 {
1212 .procname = "tcp_wmem",
1213 .data = &init_net.ipv4.sysctl_tcp_wmem,
1214 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem),
1215 .mode = 0644,
1216 .proc_handler = proc_dointvec_minmax,
1217 .extra1 = &one,
1218 },
1219 {
1220 .procname = "tcp_rmem",
1221 .data = &init_net.ipv4.sysctl_tcp_rmem,
1222 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem),
1223 .mode = 0644,
1224 .proc_handler = proc_dointvec_minmax,
1225 .extra1 = &one,
1226 },
6d82aa24
ED		 1227 {
1228 .procname = "tcp_comp_sack_delay_ns",
1229 .data = &init_net.ipv4.sysctl_tcp_comp_sack_delay_ns,
1230 .maxlen = sizeof(unsigned long),
1231 .mode = 0644,
1232 .proc_handler = proc_doulongvec_minmax,
1233 },
9c21d2fc
ED		 1234 {
1235 .procname = "tcp_comp_sack_nr",
1236 .data = &init_net.ipv4.sysctl_tcp_comp_sack_nr,
1237 .maxlen = sizeof(int),
1238 .mode = 0644,
1239 .proc_handler = proc_dointvec_minmax,
1240 .extra1 = &zero,
1241 .extra2 = &comp_sack_nr_max,
1242 },
1e802951
TZ		 1243 {
1244 .procname = "udp_rmem_min",
1245 .data = &init_net.ipv4.sysctl_udp_rmem_min,
1246 .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min),
1247 .mode = 0644,
1248 .proc_handler = proc_dointvec_minmax,
1249 .extra1 = &one
1250 },
1251 {
1252 .procname = "udp_wmem_min",
1253 .data = &init_net.ipv4.sysctl_udp_wmem_min,
1254 .maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min),
1255 .mode = 0644,
1256 .proc_handler = proc_dointvec_minmax,
1257 .extra1 = &one
1258 },
68528f09
PE		 1259 { }
1260};
1261
1577519d
PE		 1262static __net_init int ipv4_sysctl_init_net(struct net *net)
1263{
68528f09
PE		 1264 struct ctl_table *table;
1265
1266 table = ipv4_net_table;
09ad9bc7 1267 if (!net_eq(net, &init_net)) {
0a6fa23d
EB		 1268 int i;
1269
68528f09 1270 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
51456b29 1271 if (!table)
68528f09
PE		 1272 goto err_alloc;
1273
0a6fa23d
EB		 1274 /* Update the variables to point into the current struct net */
1275 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
1276 table[i].data += (void *)net - (void *)&init_net;
68528f09
PE		 1277 }
1278
ec8f23ce 1279 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
51456b29 1280 if (!net->ipv4.ipv4_hdr)
68528f09
PE		 1281 goto err_reg;
1282
122ff243
WC		 1283 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1284 if (!net->ipv4.sysctl_local_reserved_ports)
1285 goto err_ports;
1286
1577519d 1287 return 0;
68528f09 1288
122ff243
WC		 1289err_ports:
1290 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
68528f09 1291err_reg:
09ad9bc7 1292 if (!net_eq(net, &init_net))
68528f09
PE		 1293 kfree(table);
1294err_alloc:
1295 return -ENOMEM;
1577519d
PE		 1296}
1297
1298static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1299{
68528f09
PE		 1300 struct ctl_table *table;
1301
122ff243 1302 kfree(net->ipv4.sysctl_local_reserved_ports);
68528f09
PE		 1303 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1304 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1305 kfree(table);
1577519d
PE		 1306}
1307
1308static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1309 .init = ipv4_sysctl_init_net,
1310 .exit = ipv4_sysctl_exit_net,
1311};
1312
3e37c3f9
PE		 1313static __init int sysctl_ipv4_init(void)
1314{
1315 struct ctl_table_header *hdr;
1316
ec8f23ce 1317 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
51456b29 1318 if (!hdr)
1577519d
PE		 1319 return -ENOMEM;
1320
1321 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
5dd3df10 1322 unregister_net_sysctl_table(hdr);
1577519d
PE		 1323 return -ENOMEM;
1324 }
1325
1326 return 0;
3e37c3f9
PE		 1327}
1328
1329__initcall(sysctl_ipv4_init);
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