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net: add missing include in include/net/gro.h
[linux-block.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
1da177e4 9#include <linux/sysctl.h>
227b60f5 10#include <linux/seqlock.h>
3e37c3f9 11#include <linux/init.h>
5a0e3ad6 12#include <linux/slab.h>
20380731 13#include <net/icmp.h>
1da177e4 14#include <net/ip.h>
ce5c9c20 15#include <net/ip_fib.h>
1da177e4 16#include <net/tcp.h>
95766fff 17#include <net/udp.h>
446fda4f 18#include <net/cipso_ipv4.h>
c319b4d7 19#include <net/ping.h>
dddb64bc 20#include <net/protocol.h>
3ae6ec08 21#include <net/netevent.h>
1da177e4 22
79e9fed4 23static int two = 2;
4253b498 24static int three __maybe_unused = 3;
6ba8a3b1 25static int four = 4;
43e122b0 26static int thousand = 1000;
e905a9ed 27static int tcp_retr1_max = 255;
1da177e4
LT		 28static int ip_local_port_range_min[] = { 1, 1 };
29static int ip_local_port_range_max[] = { 65535, 65535 };
0147fc05
AD		 30static int tcp_adv_win_scale_min = -31;
31static int tcp_adv_win_scale_max = 31;
5f3e2bf0
ED		 32static int tcp_min_snd_mss_min = TCP_MIN_SND_MSS;
33static int tcp_min_snd_mss_max = 65535;
4548b683
KJ		 34static int ip_privileged_port_min;
35static int ip_privileged_port_max = 65535;
249fab77
ED		 36static int ip_ttl_min = 1;
37static int ip_ttl_max = 255;
651e9271
MT		 38static int tcp_syn_retries_min = 1;
39static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
c319b4d7
VK		 40static int ip_ping_group_range_min[] = { 0, 0 };
41static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
d4ce5808 42static u32 u32_max_div_HZ = UINT_MAX / HZ;
19fad20d 43static int one_day_secs = 24 * 3600;
ce5c9c20
IS		 44static u32 fib_multipath_hash_fields_all_mask __maybe_unused =
45 FIB_MULTIPATH_HASH_FIELD_ALL_MASK;
1da177e4 46
b6690b14
FW		 47/* obsolete */
48static int sysctl_tcp_low_latency __read_mostly;
49
227b60f5 50/* Update system visible IP port range */
0bbf87d8 51static void set_local_port_range(struct net *net, int range[2])
227b60f5 52{
ed2dfd90
ED		 53 bool same_parity = !((range[0] ^ range[1]) & 1);
54
4ee3bd4a 55 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
ed2dfd90
ED		 56 if (same_parity && !net->ipv4.ip_local_ports.warned) {
57 net->ipv4.ip_local_ports.warned = true;
58 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
59 }
c9d8f1a6
CW		 60 net->ipv4.ip_local_ports.range[0] = range[0];
61 net->ipv4.ip_local_ports.range[1] = range[1];
4ee3bd4a 62 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
227b60f5
SH		 63}
64
65/* Validate changes from /proc interface. */
fe2c6338 66static int ipv4_local_port_range(struct ctl_table *table, int write,
32927393 67 void *buffer, size_t *lenp, loff_t *ppos)
227b60f5 68{
0bbf87d8 69 struct net *net =
c9d8f1a6 70 container_of(table->data, struct net, ipv4.ip_local_ports.range);
227b60f5 71 int ret;
3c689b73 72 int range[2];
fe2c6338 73 struct ctl_table tmp = {
227b60f5
SH		 74 .data = &range,
75 .maxlen = sizeof(range),
76 .mode = table->mode,
77 .extra1 = &ip_local_port_range_min,
78 .extra2 = &ip_local_port_range_max,
79 };
80
0bbf87d8
EB		 81 inet_get_local_port_range(net, &range[0], &range[1]);
82
8d65af78 83 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
227b60f5
SH		 84
85 if (write && ret == 0) {
4548b683
KJ		 86 /* Ensure that the upper limit is not smaller than the lower,
87 * and that the lower does not encroach upon the privileged
88 * port limit.
89 */
90 if ((range[1] < range[0]) ||
91 (range[0] < net->ipv4.sysctl_ip_prot_sock))
227b60f5
SH		 92 ret = -EINVAL;
93 else
0bbf87d8 94 set_local_port_range(net, range);
227b60f5
SH		 95 }
96
97 return ret;
98}
99
4548b683
KJ		 100/* Validate changes from /proc interface. */
101static int ipv4_privileged_ports(struct ctl_table *table, int write,
32927393 102 void *buffer, size_t *lenp, loff_t *ppos)
4548b683
KJ		 103{
104 struct net *net = container_of(table->data, struct net,
105 ipv4.sysctl_ip_prot_sock);
106 int ret;
107 int pports;
108 int range[2];
109 struct ctl_table tmp = {
110 .data = &pports,
111 .maxlen = sizeof(pports),
112 .mode = table->mode,
113 .extra1 = &ip_privileged_port_min,
114 .extra2 = &ip_privileged_port_max,
115 };
116
117 pports = net->ipv4.sysctl_ip_prot_sock;
118
119 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
120
121 if (write && ret == 0) {
122 inet_get_local_port_range(net, &range[0], &range[1]);
123 /* Ensure that the local port range doesn't overlap with the
124 * privileged port range.
125 */
126 if (range[0] < pports)
127 ret = -EINVAL;
128 else
129 net->ipv4.sysctl_ip_prot_sock = pports;
130 }
131
132 return ret;
133}
c319b4d7 134
7064d16e 135static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
c319b4d7 136{
7064d16e 137 kgid_t *data = table->data;
0bbf87d8 138 struct net *net =
ba6b918a 139 container_of(table->data, struct net, ipv4.ping_group_range.range);
95c96174 140 unsigned int seq;
c319b4d7 141 do {
396a30cc 142 seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 143
144 *low = data[0];
145 *high = data[1];
396a30cc 146 } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
c319b4d7
VK		 147}
148
149/* Update system visible IP port range */
7064d16e 150static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
c319b4d7 151{
7064d16e 152 kgid_t *data = table->data;
0bbf87d8 153 struct net *net =
ba6b918a 154 container_of(table->data, struct net, ipv4.ping_group_range.range);
396a30cc 155 write_seqlock(&net->ipv4.ping_group_range.lock);
7064d16e
EB		 156 data[0] = low;
157 data[1] = high;
396a30cc 158 write_sequnlock(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 159}
160
161/* Validate changes from /proc interface. */
fe2c6338 162static int ipv4_ping_group_range(struct ctl_table *table, int write,
32927393 163 void *buffer, size_t *lenp, loff_t *ppos)
c319b4d7 164{
7064d16e 165 struct user_namespace *user_ns = current_user_ns();
c319b4d7 166 int ret;
7064d16e
EB		 167 gid_t urange[2];
168 kgid_t low, high;
fe2c6338 169 struct ctl_table tmp = {
7064d16e
EB		 170 .data = &urange,
171 .maxlen = sizeof(urange),
c319b4d7
VK		 172 .mode = table->mode,
173 .extra1 = &ip_ping_group_range_min,
174 .extra2 = &ip_ping_group_range_max,
175 };
176
7064d16e
EB		 177 inet_get_ping_group_range_table(table, &low, &high);
178 urange[0] = from_kgid_munged(user_ns, low);
179 urange[1] = from_kgid_munged(user_ns, high);
c319b4d7
VK		 180 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
181
7064d16e
EB		 182 if (write && ret == 0) {
183 low = make_kgid(user_ns, urange[0]);
184 high = make_kgid(user_ns, urange[1]);
70ba5b6d
TH		 185 if (!gid_valid(low) || !gid_valid(high))
186 return -EINVAL;
187 if (urange[1] < urange[0] || gid_lt(high, low)) {
7064d16e
EB		 188 low = make_kgid(&init_user_ns, 1);
189 high = make_kgid(&init_user_ns, 0);
190 }
191 set_ping_group_range(table, low, high);
192 }
c319b4d7
VK		 193
194 return ret;
195}
196
d18c5d19 197static int ipv4_fwd_update_priority(struct ctl_table *table, int write,
32927393 198 void *buffer, size_t *lenp, loff_t *ppos)
d18c5d19
PM		 199{
200 struct net *net;
201 int ret;
202
203 net = container_of(table->data, struct net,
204 ipv4.sysctl_ip_fwd_update_priority);
1c69dedc 205 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
d18c5d19
PM		 206 if (write && ret == 0)
207 call_netevent_notifiers(NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE,
208 net);
209
210 return ret;
211}
212
fe2c6338 213static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
32927393 214 void *buffer, size_t *lenp, loff_t *ppos)
317a76f9 215{
6670e152
SH		 216 struct net *net = container_of(ctl->data, struct net,
217 ipv4.tcp_congestion_control);
317a76f9 218 char val[TCP_CA_NAME_MAX];
fe2c6338 219 struct ctl_table tbl = {
317a76f9
SH		 220 .data = val,
221 .maxlen = TCP_CA_NAME_MAX,
222 };
223 int ret;
224
6670e152 225 tcp_get_default_congestion_control(net, val);
317a76f9 226
8d65af78 227 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
317a76f9 228 if (write && ret == 0)
6670e152 229 ret = tcp_set_default_congestion_control(net, val);
317a76f9
SH		 230 return ret;
231}
232
fe2c6338 233static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
32927393
CH		 234 int write, void *buffer,
235 size_t *lenp, loff_t *ppos)
3ff825b2 236{
fe2c6338 237 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
3ff825b2
SH		 238 int ret;
239
240 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
241 if (!tbl.data)
242 return -ENOMEM;
243 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
8d65af78 244 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
3ff825b2
SH		 245 kfree(tbl.data);
246 return ret;
247}
248
fe2c6338 249static int proc_allowed_congestion_control(struct ctl_table *ctl,
32927393
CH		 250 int write, void *buffer,
251 size_t *lenp, loff_t *ppos)
ce7bc3bf 252{
fe2c6338 253 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
ce7bc3bf
SH		 254 int ret;
255
256 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
257 if (!tbl.data)
258 return -ENOMEM;
259
260 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
8d65af78 261 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ce7bc3bf
SH		 262 if (write && ret == 0)
263 ret = tcp_set_allowed_congestion_control(tbl.data);
264 kfree(tbl.data);
265 return ret;
266}
267
aa1236cd
JB		 268static int sscanf_key(char *buf, __le32 *key)
269{
270 u32 user_key[4];
271 int i, ret = 0;
272
273 if (sscanf(buf, "%x-%x-%x-%x", user_key, user_key + 1,
274 user_key + 2, user_key + 3) != 4) {
275 ret = -EINVAL;
276 } else {
277 for (i = 0; i < ARRAY_SIZE(user_key); i++)
278 key[i] = cpu_to_le32(user_key[i]);
279 }
280 pr_debug("proc TFO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
281 user_key[0], user_key[1], user_key[2], user_key[3], buf, ret);
282
283 return ret;
284}
285
43713848 286static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
32927393 287 void *buffer, size_t *lenp, loff_t *ppos)
10467163 288{
43713848
HY		 289 struct net *net = container_of(table->data, struct net,
290 ipv4.sysctl_tcp_fastopen);
aa1236cd
JB		 291 /* maxlen to print the list of keys in hex (*2), with dashes
292 * separating doublewords and a comma in between keys.
293 */
294 struct ctl_table tbl = { .maxlen = ((TCP_FASTOPEN_KEY_LENGTH *
295 2 * TCP_FASTOPEN_KEY_MAX) +
296 (TCP_FASTOPEN_KEY_MAX * 5)) };
f19008e6
JB		 297 u32 user_key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u32)];
298 __le32 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(__le32)];
aa1236cd 299 char *backup_data;
f19008e6 300 int ret, i = 0, off = 0, n_keys;
10467163
JC		 301
302 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
303 if (!tbl.data)
304 return -ENOMEM;
305
f19008e6 306 n_keys = tcp_fastopen_get_cipher(net, NULL, (u64 *)key);
aa1236cd
JB		 307 if (!n_keys) {
308 memset(&key[0], 0, TCP_FASTOPEN_KEY_LENGTH);
309 n_keys = 1;
310 }
311
312 for (i = 0; i < n_keys * 4; i++)
c860e997
YC		 313 user_key[i] = le32_to_cpu(key[i]);
314
aa1236cd
JB		 315 for (i = 0; i < n_keys; i++) {
316 off += snprintf(tbl.data + off, tbl.maxlen - off,
317 "%08x-%08x-%08x-%08x",
318 user_key[i * 4],
319 user_key[i * 4 + 1],
320 user_key[i * 4 + 2],
321 user_key[i * 4 + 3]);
9bb59a21
HL		 322
323 if (WARN_ON_ONCE(off >= tbl.maxlen - 1))
324 break;
325
aa1236cd
JB		 326 if (i + 1 < n_keys)
327 off += snprintf(tbl.data + off, tbl.maxlen - off, ",");
328 }
329
10467163
JC		 330 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
331
332 if (write && ret == 0) {
aa1236cd
JB		 333 backup_data = strchr(tbl.data, ',');
334 if (backup_data) {
335 *backup_data = '\0';
336 backup_data++;
337 }
338 if (sscanf_key(tbl.data, key)) {
10467163
JC		 339 ret = -EINVAL;
340 goto bad_key;
341 }
aa1236cd
JB		 342 if (backup_data) {
343 if (sscanf_key(backup_data, key + 4)) {
344 ret = -EINVAL;
345 goto bad_key;
346 }
347 }
348 tcp_fastopen_reset_cipher(net, NULL, key,
438ac880 349 backup_data ? key + 4 : NULL);
10467163
JC		 350 }
351
352bad_key:
10467163
JC		 353 kfree(tbl.data);
354 return ret;
355}
356
dddb64bc 357static void proc_configure_early_demux(int enabled, int protocol)
358{
359 struct net_protocol *ipprot;
360#if IS_ENABLED(CONFIG_IPV6)
361 struct inet6_protocol *ip6prot;
362#endif
363
58c4c6a3
DA		 364 rcu_read_lock();
365
dddb64bc 366 ipprot = rcu_dereference(inet_protos[protocol]);
367 if (ipprot)
368 ipprot->early_demux = enabled ? ipprot->early_demux_handler :
369 NULL;
370
371#if IS_ENABLED(CONFIG_IPV6)
372 ip6prot = rcu_dereference(inet6_protos[protocol]);
373 if (ip6prot)
374 ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
375 NULL;
376#endif
58c4c6a3 377 rcu_read_unlock();
dddb64bc 378}
379
380static int proc_tcp_early_demux(struct ctl_table *table, int write,
32927393 381 void *buffer, size_t *lenp, loff_t *ppos)
dddb64bc 382{
383 int ret = 0;
384
2932bcda 385 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
dddb64bc 386
387 if (write && !ret) {
388 int enabled = init_net.ipv4.sysctl_tcp_early_demux;
389
390 proc_configure_early_demux(enabled, IPPROTO_TCP);
391 }
392
393 return ret;
394}
395
396static int proc_udp_early_demux(struct ctl_table *table, int write,
32927393 397 void *buffer, size_t *lenp, loff_t *ppos)
dddb64bc 398{
399 int ret = 0;
400
2932bcda 401 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
dddb64bc 402
403 if (write && !ret) {
404 int enabled = init_net.ipv4.sysctl_udp_early_demux;
405
406 proc_configure_early_demux(enabled, IPPROTO_UDP);
407 }
408
409 return ret;
410}
411
cf1ef3f0 412static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table,
32927393 413 int write, void *buffer,
cf1ef3f0
WW		 414 size_t *lenp, loff_t *ppos)
415{
3733be14
HY		 416 struct net *net = container_of(table->data, struct net,
417 ipv4.sysctl_tcp_fastopen_blackhole_timeout);
cf1ef3f0
WW		 418 int ret;
419
420 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
421 if (write && ret == 0)
3733be14 422 atomic_set(&net->ipv4.tfo_active_disable_times, 0);
734942cc
DW		 423
424 return ret;
425}
426
427static int proc_tcp_available_ulp(struct ctl_table *ctl,
32927393 428 int write, void *buffer, size_t *lenp,
734942cc
DW		 429 loff_t *ppos)
430{
431 struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
432 int ret;
433
434 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
435 if (!tbl.data)
436 return -ENOMEM;
437 tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
438 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
439 kfree(tbl.data);
440
cf1ef3f0
WW		 441 return ret;
442}
443
3ae6ec08
IS		 444#ifdef CONFIG_IP_ROUTE_MULTIPATH
445static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write,
32927393 446 void *buffer, size_t *lenp,
3ae6ec08
IS		 447 loff_t *ppos)
448{
449 struct net *net = container_of(table->data, struct net,
450 ipv4.sysctl_fib_multipath_hash_policy);
451 int ret;
452
be205fe6 453 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
3ae6ec08 454 if (write && ret == 0)
3192dac6 455 call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net);
3ae6ec08
IS		 456
457 return ret;
458}
eb0e4d59
IS		 459
460static int proc_fib_multipath_hash_fields(struct ctl_table *table, int write,
461 void *buffer, size_t *lenp,
462 loff_t *ppos)
463{
464 struct net *net;
465 int ret;
466
467 net = container_of(table->data, struct net,
468 ipv4.sysctl_fib_multipath_hash_fields);
469 ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos);
470 if (write && ret == 0)
471 call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net);
472
473 return ret;
474}
3ae6ec08
IS		 475#endif
476
3e37c3f9 477static struct ctl_table ipv4_table[] = {
1da177e4 478 {
1da177e4
LT		 479 .procname = "tcp_max_orphans",
480 .data = &sysctl_tcp_max_orphans,
481 .maxlen = sizeof(int),
482 .mode = 0644,
6d9f239a 483 .proc_handler = proc_dointvec
1da177e4 484 },
1da177e4 485 {
1da177e4
LT		 486 .procname = "inet_peer_threshold",
487 .data = &inet_peer_threshold,
488 .maxlen = sizeof(int),
489 .mode = 0644,
6d9f239a 490 .proc_handler = proc_dointvec
1da177e4
LT		 491 },
492 {
1da177e4
LT		 493 .procname = "inet_peer_minttl",
494 .data = &inet_peer_minttl,
495 .maxlen = sizeof(int),
496 .mode = 0644,
6d9f239a 497 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 498 },
499 {
1da177e4
LT		 500 .procname = "inet_peer_maxttl",
501 .data = &inet_peer_maxttl,
502 .maxlen = sizeof(int),
503 .mode = 0644,
6d9f239a 504 .proc_handler = proc_dointvec_jiffies,
1da177e4 505 },
a4fe34bf
EB		 506 {
507 .procname = "tcp_mem",
508 .maxlen = sizeof(sysctl_tcp_mem),
509 .data = &sysctl_tcp_mem,
510 .mode = 0644,
511 .proc_handler = proc_doulongvec_minmax,
512 },
1da177e4 513 {
1da177e4
LT		 514 .procname = "tcp_low_latency",
515 .data = &sysctl_tcp_low_latency,
516 .maxlen = sizeof(int),
517 .mode = 0644,
6d9f239a 518 .proc_handler = proc_dointvec
1da177e4 519 },
446fda4f
PM		 520#ifdef CONFIG_NETLABEL
521 {
446fda4f
PM		 522 .procname = "cipso_cache_enable",
523 .data = &cipso_v4_cache_enabled,
524 .maxlen = sizeof(int),
525 .mode = 0644,
6d9f239a 526 .proc_handler = proc_dointvec,
446fda4f
PM		 527 },
528 {
446fda4f
PM		 529 .procname = "cipso_cache_bucket_size",
530 .data = &cipso_v4_cache_bucketsize,
531 .maxlen = sizeof(int),
532 .mode = 0644,
6d9f239a 533 .proc_handler = proc_dointvec,
446fda4f
PM		 534 },
535 {
446fda4f
PM		 536 .procname = "cipso_rbm_optfmt",
537 .data = &cipso_v4_rbm_optfmt,
538 .maxlen = sizeof(int),
539 .mode = 0644,
6d9f239a 540 .proc_handler = proc_dointvec,
446fda4f
PM		 541 },
542 {
446fda4f
PM		 543 .procname = "cipso_rbm_strictvalid",
544 .data = &cipso_v4_rbm_strictvalid,
545 .maxlen = sizeof(int),
546 .mode = 0644,
6d9f239a 547 .proc_handler = proc_dointvec,
446fda4f
PM		 548 },
549#endif /* CONFIG_NETLABEL */
734942cc
DW		 550 {
551 .procname = "tcp_available_ulp",
552 .maxlen = TCP_ULP_BUF_MAX,
553 .mode = 0444,
554 .proc_handler = proc_tcp_available_ulp,
555 },
4cdf507d
ED		 556 {
557 .procname = "icmp_msgs_per_sec",
558 .data = &sysctl_icmp_msgs_per_sec,
559 .maxlen = sizeof(int),
560 .mode = 0644,
561 .proc_handler = proc_dointvec_minmax,
eec4844f 562 .extra1 = SYSCTL_ZERO,
4cdf507d
ED		 563 },
564 {
565 .procname = "icmp_msgs_burst",
566 .data = &sysctl_icmp_msgs_burst,
567 .maxlen = sizeof(int),
568 .mode = 0644,
569 .proc_handler = proc_dointvec_minmax,
eec4844f 570 .extra1 = SYSCTL_ZERO,
4cdf507d 571 },
95766fff 572 {
95766fff
HA		 573 .procname = "udp_mem",
574 .data = &sysctl_udp_mem,
575 .maxlen = sizeof(sysctl_udp_mem),
576 .mode = 0644,
8d987e5c 577 .proc_handler = proc_doulongvec_minmax,
95766fff 578 },
9ab948a9
DA		 579 {
580 .procname = "fib_sync_mem",
581 .data = &sysctl_fib_sync_mem,
582 .maxlen = sizeof(sysctl_fib_sync_mem),
583 .mode = 0644,
584 .proc_handler = proc_douintvec_minmax,
585 .extra1 = &sysctl_fib_sync_mem_min,
586 .extra2 = &sysctl_fib_sync_mem_max,
587 },
f8572d8f 588 { }
1da177e4 589};
3e37c3f9 590
68528f09
PE		 591static struct ctl_table ipv4_net_table[] = {
592 {
68528f09
PE		 593 .procname = "icmp_echo_ignore_all",
594 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
4b6bbf17 595 .maxlen = sizeof(u8),
68528f09 596 .mode = 0644,
4b6bbf17 597 .proc_handler = proc_dou8vec_minmax,
68528f09 598 },
f1b8fa9f
AR		 599 {
600 .procname = "icmp_echo_enable_probe",
601 .data = &init_net.ipv4.sysctl_icmp_echo_enable_probe,
b8128656 602 .maxlen = sizeof(u8),
f1b8fa9f 603 .mode = 0644,
b8128656 604 .proc_handler = proc_dou8vec_minmax,
f1b8fa9f
AR		 605 .extra1 = SYSCTL_ZERO,
606 .extra2 = SYSCTL_ONE
607 },
68528f09 608 {
68528f09
PE		 609 .procname = "icmp_echo_ignore_broadcasts",
610 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
4b6bbf17 611 .maxlen = sizeof(u8),
68528f09 612 .mode = 0644,
4b6bbf17 613 .proc_handler = proc_dou8vec_minmax,
68528f09
PE		 614 },
615 {
68528f09
PE		 616 .procname = "icmp_ignore_bogus_error_responses",
617 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
4b6bbf17 618 .maxlen = sizeof(u8),
68528f09 619 .mode = 0644,
4b6bbf17 620 .proc_handler = proc_dou8vec_minmax,
68528f09
PE		 621 },
622 {
68528f09
PE		 623 .procname = "icmp_errors_use_inbound_ifaddr",
624 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
4b6bbf17 625 .maxlen = sizeof(u8),
68528f09 626 .mode = 0644,
4b6bbf17 627 .proc_handler = proc_dou8vec_minmax,
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 },
6897445f
MM		 650#ifdef CONFIG_NET_L3_MASTER_DEV
651 {
652 .procname = "raw_l3mdev_accept",
653 .data = &init_net.ipv4.sysctl_raw_l3mdev_accept,
4b6bbf17 654 .maxlen = sizeof(u8),
6897445f 655 .mode = 0644,
4b6bbf17 656 .proc_handler = proc_dou8vec_minmax,
eec4844f
MC		 657 .extra1 = SYSCTL_ZERO,
658 .extra2 = SYSCTL_ONE,
6897445f
MM		 659 },
660#endif
5d134f1c
HFS		 661 {
662 .procname = "tcp_ecn",
663 .data = &init_net.ipv4.sysctl_tcp_ecn,
4b6bbf17 664 .maxlen = sizeof(u8),
5d134f1c 665 .mode = 0644,
4b6bbf17 666 .proc_handler = proc_dou8vec_minmax,
5d134f1c 667 },
49213555
DB		 668 {
669 .procname = "tcp_ecn_fallback",
670 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
4b6bbf17 671 .maxlen = sizeof(u8),
49213555 672 .mode = 0644,
4b6bbf17 673 .proc_handler = proc_dou8vec_minmax,
49213555 674 },
287b7f38
NB		 675 {
676 .procname = "ip_dynaddr",
677 .data = &init_net.ipv4.sysctl_ip_dynaddr,
4b6bbf17 678 .maxlen = sizeof(u8),
287b7f38 679 .mode = 0644,
4b6bbf17 680 .proc_handler = proc_dou8vec_minmax,
287b7f38 681 },
e21145a9
NB		 682 {
683 .procname = "ip_early_demux",
684 .data = &init_net.ipv4.sysctl_ip_early_demux,
4b6bbf17 685 .maxlen = sizeof(u8),
e21145a9 686 .mode = 0644,
4b6bbf17 687 .proc_handler = proc_dou8vec_minmax,
e21145a9 688 },
dddb64bc 689 {
690 .procname = "udp_early_demux",
691 .data = &init_net.ipv4.sysctl_udp_early_demux,
2932bcda 692 .maxlen = sizeof(u8),
dddb64bc 693 .mode = 0644,
694 .proc_handler = proc_udp_early_demux
695 },
696 {
697 .procname = "tcp_early_demux",
698 .data = &init_net.ipv4.sysctl_tcp_early_demux,
2932bcda 699 .maxlen = sizeof(u8),
dddb64bc 700 .mode = 0644,
701 .proc_handler = proc_tcp_early_demux
702 },
4f80116d
RP		 703 {
704 .procname = "nexthop_compat_mode",
705 .data = &init_net.ipv4.sysctl_nexthop_compat_mode,
4b6bbf17 706 .maxlen = sizeof(u8),
4f80116d 707 .mode = 0644,
4b6bbf17 708 .proc_handler = proc_dou8vec_minmax,
4f80116d
RP		 709 .extra1 = SYSCTL_ZERO,
710 .extra2 = SYSCTL_ONE,
711 },
fa50d974
NB		 712 {
713 .procname = "ip_default_ttl",
714 .data = &init_net.ipv4.sysctl_ip_default_ttl,
4b6bbf17 715 .maxlen = sizeof(u8),
fa50d974 716 .mode = 0644,
4b6bbf17 717 .proc_handler = proc_dou8vec_minmax,
fa50d974
NB		 718 .extra1 = &ip_ttl_min,
719 .extra2 = &ip_ttl_max,
720 },
0bbf87d8
EB		 721 {
722 .procname = "ip_local_port_range",
c9d8f1a6
CW		 723 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
724 .data = &init_net.ipv4.ip_local_ports.range,
0bbf87d8
EB		 725 .mode = 0644,
726 .proc_handler = ipv4_local_port_range,
727 },
122ff243
WC		 728 {
729 .procname = "ip_local_reserved_ports",
730 .data = &init_net.ipv4.sysctl_local_reserved_ports,
731 .maxlen = 65536,
732 .mode = 0644,
733 .proc_handler = proc_do_large_bitmap,
734 },
974eda11
HFS		 735 {
736 .procname = "ip_no_pmtu_disc",
737 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
4b6bbf17 738 .maxlen = sizeof(u8),
974eda11 739 .mode = 0644,
4b6bbf17 740 .proc_handler = proc_dou8vec_minmax,
974eda11 741 },
f87c10a8
HFS		 742 {
743 .procname = "ip_forward_use_pmtu",
744 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
4b6bbf17 745 .maxlen = sizeof(u8),
f87c10a8 746 .mode = 0644,
4b6bbf17 747 .proc_handler = proc_dou8vec_minmax,
f87c10a8 748 },
432e05d3
PM		 749 {
750 .procname = "ip_forward_update_priority",
751 .data = &init_net.ipv4.sysctl_ip_fwd_update_priority,
1c69dedc 752 .maxlen = sizeof(u8),
432e05d3 753 .mode = 0644,
d18c5d19 754 .proc_handler = ipv4_fwd_update_priority,
eec4844f
MC		 755 .extra1 = SYSCTL_ZERO,
756 .extra2 = SYSCTL_ONE,
432e05d3 757 },
49a60158
VB		 758 {
759 .procname = "ip_nonlocal_bind",
760 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
4b6bbf17 761 .maxlen = sizeof(u8),
49a60158 762 .mode = 0644,
4b6bbf17 763 .proc_handler = proc_dou8vec_minmax,
49a60158 764 },
4b01a967
KI		 765 {
766 .procname = "ip_autobind_reuse",
767 .data = &init_net.ipv4.sysctl_ip_autobind_reuse,
4b6bbf17 768 .maxlen = sizeof(u8),
4b01a967 769 .mode = 0644,
4b6bbf17 770 .proc_handler = proc_dou8vec_minmax,
4b01a967
KI		 771 .extra1 = SYSCTL_ZERO,
772 .extra2 = SYSCTL_ONE,
773 },
e110861f
LC		 774 {
775 .procname = "fwmark_reflect",
776 .data = &init_net.ipv4.sysctl_fwmark_reflect,
4b6bbf17 777 .maxlen = sizeof(u8),
e110861f 778 .mode = 0644,
4b6bbf17 779 .proc_handler = proc_dou8vec_minmax,
e110861f 780 },
84f39b08
LC		 781 {
782 .procname = "tcp_fwmark_accept",
783 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
4ecc1baf 784 .maxlen = sizeof(u8),
84f39b08 785 .mode = 0644,
4ecc1baf 786 .proc_handler = proc_dou8vec_minmax,
84f39b08 787 },
6dd9a14e
DA		 788#ifdef CONFIG_NET_L3_MASTER_DEV
789 {
790 .procname = "tcp_l3mdev_accept",
791 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
4ecc1baf 792 .maxlen = sizeof(u8),
6dd9a14e 793 .mode = 0644,
4ecc1baf 794 .proc_handler = proc_dou8vec_minmax,
eec4844f
MC		 795 .extra1 = SYSCTL_ZERO,
796 .extra2 = SYSCTL_ONE,
6dd9a14e
DA		 797 },
798#endif
b0f9ca53
FD		 799 {
800 .procname = "tcp_mtu_probing",
801 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
4ecc1baf 802 .maxlen = sizeof(u8),
b0f9ca53 803 .mode = 0644,
4ecc1baf 804 .proc_handler = proc_dou8vec_minmax,
b0f9ca53
FD		 805 },
806 {
807 .procname = "tcp_base_mss",
808 .data = &init_net.ipv4.sysctl_tcp_base_mss,
809 .maxlen = sizeof(int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec,
812 },
5f3e2bf0
ED		 813 {
814 .procname = "tcp_min_snd_mss",
815 .data = &init_net.ipv4.sysctl_tcp_min_snd_mss,
816 .maxlen = sizeof(int),
817 .mode = 0644,
818 .proc_handler = proc_dointvec_minmax,
819 .extra1 = &tcp_min_snd_mss_min,
820 .extra2 = &tcp_min_snd_mss_max,
821 },
c04b79b6
JH		 822 {
823 .procname = "tcp_mtu_probe_floor",
824 .data = &init_net.ipv4.sysctl_tcp_mtu_probe_floor,
825 .maxlen = sizeof(int),
826 .mode = 0644,
827 .proc_handler = proc_dointvec_minmax,
828 .extra1 = &tcp_min_snd_mss_min,
829 .extra2 = &tcp_min_snd_mss_max,
830 },
6b58e0a5
FD		 831 {
832 .procname = "tcp_probe_threshold",
833 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
834 .maxlen = sizeof(int),
835 .mode = 0644,
836 .proc_handler = proc_dointvec,
837 },
05cbc0db
FD		 838 {
839 .procname = "tcp_probe_interval",
840 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
d4ce5808 841 .maxlen = sizeof(u32),
05cbc0db 842 .mode = 0644,
d4ce5808
MŻ		 843 .proc_handler = proc_douintvec_minmax,
844 .extra2 = &u32_max_div_HZ,
05cbc0db 845 },
df2cf4a7
PD		 846 {
847 .procname = "igmp_link_local_mcast_reports",
87a8a2ae 848 .data = &init_net.ipv4.sysctl_igmp_llm_reports,
7d4b37eb 849 .maxlen = sizeof(u8),
df2cf4a7 850 .mode = 0644,
7d4b37eb 851 .proc_handler = proc_dou8vec_minmax,
df2cf4a7 852 },
815c5270
NB		 853 {
854 .procname = "igmp_max_memberships",
855 .data = &init_net.ipv4.sysctl_igmp_max_memberships,
856 .maxlen = sizeof(int),
857 .mode = 0644,
858 .proc_handler = proc_dointvec
859 },
166b6b2d
NB		 860 {
861 .procname = "igmp_max_msf",
862 .data = &init_net.ipv4.sysctl_igmp_max_msf,
863 .maxlen = sizeof(int),
864 .mode = 0644,
865 .proc_handler = proc_dointvec
866 },
165094af
NB		 867#ifdef CONFIG_IP_MULTICAST
868 {
869 .procname = "igmp_qrv",
870 .data = &init_net.ipv4.sysctl_igmp_qrv,
871 .maxlen = sizeof(int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec_minmax,
eec4844f 874 .extra1 = SYSCTL_ONE
165094af
NB		 875 },
876#endif
6670e152
SH		 877 {
878 .procname = "tcp_congestion_control",
879 .data = &init_net.ipv4.tcp_congestion_control,
880 .mode = 0644,
881 .maxlen = TCP_CA_NAME_MAX,
882 .proc_handler = proc_tcp_congestion_control,
883 },
9cb8e048
CB		 884 {
885 .procname = "tcp_available_congestion_control",
886 .maxlen = TCP_CA_BUF_MAX,
887 .mode = 0444,
888 .proc_handler = proc_tcp_available_congestion_control,
889 },
890 {
891 .procname = "tcp_allowed_congestion_control",
892 .maxlen = TCP_CA_BUF_MAX,
893 .mode = 0644,
894 .proc_handler = proc_allowed_congestion_control,
895 },
13b287e8
NB		 896 {
897 .procname = "tcp_keepalive_time",
898 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
899 .maxlen = sizeof(int),
900 .mode = 0644,
901 .proc_handler = proc_dointvec_jiffies,
902 },
9bd6861b
NB		 903 {
904 .procname = "tcp_keepalive_probes",
905 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
4ecc1baf 906 .maxlen = sizeof(u8),
9bd6861b 907 .mode = 0644,
4ecc1baf 908 .proc_handler = proc_dou8vec_minmax,
9bd6861b 909 },
b840d15d
NB		 910 {
911 .procname = "tcp_keepalive_intvl",
912 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
913 .maxlen = sizeof(int),
914 .mode = 0644,
915 .proc_handler = proc_dointvec_jiffies,
916 },
6fa25166
NB		 917 {
918 .procname = "tcp_syn_retries",
919 .data = &init_net.ipv4.sysctl_tcp_syn_retries,
4ecc1baf 920 .maxlen = sizeof(u8),
6fa25166 921 .mode = 0644,
4ecc1baf 922 .proc_handler = proc_dou8vec_minmax,
6fa25166
NB		 923 .extra1 = &tcp_syn_retries_min,
924 .extra2 = &tcp_syn_retries_max
925 },
7c083ecb
NB		 926 {
927 .procname = "tcp_synack_retries",
928 .data = &init_net.ipv4.sysctl_tcp_synack_retries,
4ecc1baf 929 .maxlen = sizeof(u8),
7c083ecb 930 .mode = 0644,
4ecc1baf 931 .proc_handler = proc_dou8vec_minmax,
7c083ecb 932 },
12ed8244
NB		 933#ifdef CONFIG_SYN_COOKIES
934 {
935 .procname = "tcp_syncookies",
936 .data = &init_net.ipv4.sysctl_tcp_syncookies,
4ecc1baf 937 .maxlen = sizeof(u8),
12ed8244 938 .mode = 0644,
4ecc1baf 939 .proc_handler = proc_dou8vec_minmax,
12ed8244
NB		 940 },
941#endif
f9ac779f
KI		 942 {
943 .procname = "tcp_migrate_req",
944 .data = &init_net.ipv4.sysctl_tcp_migrate_req,
945 .maxlen = sizeof(u8),
946 .mode = 0644,
947 .proc_handler = proc_dou8vec_minmax,
948 .extra1 = SYSCTL_ZERO,
949 .extra2 = SYSCTL_ONE
950 },
1043e25f
NB		 951 {
952 .procname = "tcp_reordering",
953 .data = &init_net.ipv4.sysctl_tcp_reordering,
954 .maxlen = sizeof(int),
955 .mode = 0644,
956 .proc_handler = proc_dointvec
957 },
ae5c3f40
NB		 958 {
959 .procname = "tcp_retries1",
960 .data = &init_net.ipv4.sysctl_tcp_retries1,
4ecc1baf 961 .maxlen = sizeof(u8),
ae5c3f40 962 .mode = 0644,
4ecc1baf 963 .proc_handler = proc_dou8vec_minmax,
ae5c3f40
NB		 964 .extra2 = &tcp_retr1_max
965 },
c6214a97
NB		 966 {
967 .procname = "tcp_retries2",
968 .data = &init_net.ipv4.sysctl_tcp_retries2,
4ecc1baf 969 .maxlen = sizeof(u8),
c6214a97 970 .mode = 0644,
4ecc1baf 971 .proc_handler = proc_dou8vec_minmax,
c6214a97 972 },
c402d9be
NB		 973 {
974 .procname = "tcp_orphan_retries",
975 .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
4ecc1baf 976 .maxlen = sizeof(u8),
c402d9be 977 .mode = 0644,
4ecc1baf 978 .proc_handler = proc_dou8vec_minmax,
c402d9be 979 },
1e579caa
NB		 980 {
981 .procname = "tcp_fin_timeout",
982 .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
983 .maxlen = sizeof(int),
984 .mode = 0644,
985 .proc_handler = proc_dointvec_jiffies,
986 },
4979f2d9
NB		 987 {
988 .procname = "tcp_notsent_lowat",
989 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
990 .maxlen = sizeof(unsigned int),
991 .mode = 0644,
b007f090 992 .proc_handler = proc_douintvec,
4979f2d9 993 },
56ab6b93
HY		 994 {
995 .procname = "tcp_tw_reuse",
996 .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
4ecc1baf 997 .maxlen = sizeof(u8),
56ab6b93 998 .mode = 0644,
4ecc1baf 999 .proc_handler = proc_dou8vec_minmax,
eec4844f 1000 .extra1 = SYSCTL_ZERO,
79e9fed4 1001 .extra2 = &two,
56ab6b93 1002 },
1946e672
HY		 1003 {
1004 .procname = "tcp_max_tw_buckets",
1005 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
1006 .maxlen = sizeof(int),
1007 .mode = 0644,
1008 .proc_handler = proc_dointvec
1009 },
fee83d09
HY		 1010 {
1011 .procname = "tcp_max_syn_backlog",
1012 .data = &init_net.ipv4.sysctl_max_syn_backlog,
1013 .maxlen = sizeof(int),
1014 .mode = 0644,
1015 .proc_handler = proc_dointvec
1016 },
e1cfcbe8
HY		 1017 {
1018 .procname = "tcp_fastopen",
1019 .data = &init_net.ipv4.sysctl_tcp_fastopen,
1020 .maxlen = sizeof(int),
1021 .mode = 0644,
1022 .proc_handler = proc_dointvec,
1023 },
43713848
HY		 1024 {
1025 .procname = "tcp_fastopen_key",
1026 .mode = 0600,
1027 .data = &init_net.ipv4.sysctl_tcp_fastopen,
aa1236cd
JB		 1028 /* maxlen to print the list of keys in hex (*2), with dashes
1029 * separating doublewords and a comma in between keys.
1030 */
1031 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH *
1032 2 * TCP_FASTOPEN_KEY_MAX) +
1033 (TCP_FASTOPEN_KEY_MAX * 5)),
43713848
HY		 1034 .proc_handler = proc_tcp_fastopen_key,
1035 },
3733be14
HY		 1036 {
1037 .procname = "tcp_fastopen_blackhole_timeout_sec",
1038 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
1039 .maxlen = sizeof(int),
1040 .mode = 0644,
1041 .proc_handler = proc_tfo_blackhole_detect_timeout,
eec4844f 1042 .extra1 = SYSCTL_ZERO,
3733be14 1043 },
a6db4494
DA		 1044#ifdef CONFIG_IP_ROUTE_MULTIPATH
1045 {
1046 .procname = "fib_multipath_use_neigh",
1047 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
be205fe6 1048 .maxlen = sizeof(u8),
a6db4494 1049 .mode = 0644,
be205fe6 1050 .proc_handler = proc_dou8vec_minmax,
eec4844f
MC		 1051 .extra1 = SYSCTL_ZERO,
1052 .extra2 = SYSCTL_ONE,
bf4e0a3d
NA		 1053 },
1054 {
1055 .procname = "fib_multipath_hash_policy",
1056 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
be205fe6 1057 .maxlen = sizeof(u8),
bf4e0a3d 1058 .mode = 0644,
3ae6ec08 1059 .proc_handler = proc_fib_multipath_hash_policy,
eec4844f 1060 .extra1 = SYSCTL_ZERO,
4253b498 1061 .extra2 = &three,
a6db4494 1062 },
ce5c9c20
IS		 1063 {
1064 .procname = "fib_multipath_hash_fields",
1065 .data = &init_net.ipv4.sysctl_fib_multipath_hash_fields,
1066 .maxlen = sizeof(u32),
1067 .mode = 0644,
eb0e4d59 1068 .proc_handler = proc_fib_multipath_hash_fields,
ce5c9c20
IS		 1069 .extra1 = SYSCTL_ONE,
1070 .extra2 = &fib_multipath_hash_fields_all_mask,
1071 },
a6db4494 1072#endif
4548b683
KJ		 1073 {
1074 .procname = "ip_unprivileged_port_start",
1075 .maxlen = sizeof(int),
1076 .data = &init_net.ipv4.sysctl_ip_prot_sock,
1077 .mode = 0644,
1078 .proc_handler = ipv4_privileged_ports,
1079 },
63a6fff3
RS		 1080#ifdef CONFIG_NET_L3_MASTER_DEV
1081 {
1082 .procname = "udp_l3mdev_accept",
1083 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
cd04bd02 1084 .maxlen = sizeof(u8),
63a6fff3 1085 .mode = 0644,
cd04bd02 1086 .proc_handler = proc_dou8vec_minmax,
eec4844f
MC		 1087 .extra1 = SYSCTL_ZERO,
1088 .extra2 = SYSCTL_ONE,
63a6fff3
RS		 1089 },
1090#endif
f9301034
ED		 1091 {
1092 .procname = "tcp_sack",
1093 .data = &init_net.ipv4.sysctl_tcp_sack,
4ecc1baf 1094 .maxlen = sizeof(u8),
f9301034 1095 .mode = 0644,
4ecc1baf 1096 .proc_handler = proc_dou8vec_minmax,
f9301034 1097 },
9bb37ef0
ED		 1098 {
1099 .procname = "tcp_window_scaling",
1100 .data = &init_net.ipv4.sysctl_tcp_window_scaling,
4ecc1baf 1101 .maxlen = sizeof(u8),
9bb37ef0 1102 .mode = 0644,
4ecc1baf 1103 .proc_handler = proc_dou8vec_minmax,
9bb37ef0 1104 },
5d2ed052
ED		 1105 {
1106 .procname = "tcp_timestamps",
1107 .data = &init_net.ipv4.sysctl_tcp_timestamps,
4ecc1baf 1108 .maxlen = sizeof(u8),
5d2ed052 1109 .mode = 0644,
4ecc1baf 1110 .proc_handler = proc_dou8vec_minmax,
5d2ed052 1111 },
2ae21cf5
ED		 1112 {
1113 .procname = "tcp_early_retrans",
1114 .data = &init_net.ipv4.sysctl_tcp_early_retrans,
4ecc1baf 1115 .maxlen = sizeof(u8),
2ae21cf5 1116 .mode = 0644,
4ecc1baf 1117 .proc_handler = proc_dou8vec_minmax,
eec4844f 1118 .extra1 = SYSCTL_ZERO,
2ae21cf5
ED		 1119 .extra2 = &four,
1120 },
e20223f1
ED		 1121 {
1122 .procname = "tcp_recovery",
1123 .data = &init_net.ipv4.sysctl_tcp_recovery,
4ecc1baf 1124 .maxlen = sizeof(u8),
e20223f1 1125 .mode = 0644,
4ecc1baf 1126 .proc_handler = proc_dou8vec_minmax,
e20223f1 1127 },
2c04ac8a
ED		 1128 {
1129 .procname = "tcp_thin_linear_timeouts",
1130 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
4ecc1baf 1131 .maxlen = sizeof(u8),
2c04ac8a 1132 .mode = 0644,
4ecc1baf 1133 .proc_handler = proc_dou8vec_minmax,
2c04ac8a 1134 },
b510f0d2
ED		 1135 {
1136 .procname = "tcp_slow_start_after_idle",
1137 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
4ecc1baf 1138 .maxlen = sizeof(u8),
b510f0d2 1139 .mode = 0644,
4ecc1baf 1140 .proc_handler = proc_dou8vec_minmax,
b510f0d2 1141 },
e0a1e5b5
ED		 1142 {
1143 .procname = "tcp_retrans_collapse",
1144 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
4ecc1baf 1145 .maxlen = sizeof(u8),
e0a1e5b5 1146 .mode = 0644,
4ecc1baf 1147 .proc_handler = proc_dou8vec_minmax,
e0a1e5b5 1148 },
3f4c7c6f
ED		 1149 {
1150 .procname = "tcp_stdurg",
1151 .data = &init_net.ipv4.sysctl_tcp_stdurg,
4ecc1baf 1152 .maxlen = sizeof(u8),
3f4c7c6f 1153 .mode = 0644,
4ecc1baf 1154 .proc_handler = proc_dou8vec_minmax,
3f4c7c6f 1155 },
625357aa
ED		 1156 {
1157 .procname = "tcp_rfc1337",
1158 .data = &init_net.ipv4.sysctl_tcp_rfc1337,
4ecc1baf 1159 .maxlen = sizeof(u8),
625357aa 1160 .mode = 0644,
4ecc1baf 1161 .proc_handler = proc_dou8vec_minmax,
625357aa 1162 },
65c9410c
ED		 1163 {
1164 .procname = "tcp_abort_on_overflow",
1165 .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
4ecc1baf 1166 .maxlen = sizeof(u8),
65c9410c 1167 .mode = 0644,
4ecc1baf 1168 .proc_handler = proc_dou8vec_minmax,
65c9410c 1169 },
0bc65a28
ED		 1170 {
1171 .procname = "tcp_fack",
1172 .data = &init_net.ipv4.sysctl_tcp_fack,
4ecc1baf 1173 .maxlen = sizeof(u8),
0bc65a28 1174 .mode = 0644,
4ecc1baf 1175 .proc_handler = proc_dou8vec_minmax,
0bc65a28 1176 },
c6e21803
ED		 1177 {
1178 .procname = "tcp_max_reordering",
1179 .data = &init_net.ipv4.sysctl_tcp_max_reordering,
1180 .maxlen = sizeof(int),
1181 .mode = 0644,
1182 .proc_handler = proc_dointvec
1183 },
6496f6bd
ED		 1184 {
1185 .procname = "tcp_dsack",
1186 .data = &init_net.ipv4.sysctl_tcp_dsack,
4ecc1baf 1187 .maxlen = sizeof(u8),
6496f6bd 1188 .mode = 0644,
4ecc1baf 1189 .proc_handler = proc_dou8vec_minmax,
6496f6bd 1190 },
0c12654a
ED		 1191 {
1192 .procname = "tcp_app_win",
1193 .data = &init_net.ipv4.sysctl_tcp_app_win,
4ecc1baf 1194 .maxlen = sizeof(u8),
0c12654a 1195 .mode = 0644,
4ecc1baf 1196 .proc_handler = proc_dou8vec_minmax,
0c12654a 1197 },
94f0893e
ED		 1198 {
1199 .procname = "tcp_adv_win_scale",
1200 .data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
1201 .maxlen = sizeof(int),
1202 .mode = 0644,
1203 .proc_handler = proc_dointvec_minmax,
1204 .extra1 = &tcp_adv_win_scale_min,
1205 .extra2 = &tcp_adv_win_scale_max,
1206 },
af9b69a7
ED		 1207 {
1208 .procname = "tcp_frto",
1209 .data = &init_net.ipv4.sysctl_tcp_frto,
4ecc1baf 1210 .maxlen = sizeof(u8),
af9b69a7 1211 .mode = 0644,
4ecc1baf 1212 .proc_handler = proc_dou8vec_minmax,
af9b69a7 1213 },
ec36e416
ED		 1214 {
1215 .procname = "tcp_no_metrics_save",
1216 .data = &init_net.ipv4.sysctl_tcp_nometrics_save,
4ecc1baf 1217 .maxlen = sizeof(u8),
ec36e416 1218 .mode = 0644,
4ecc1baf 1219 .proc_handler = proc_dou8vec_minmax,
ec36e416 1220 },
65e6d901
KYY		 1221 {
1222 .procname = "tcp_no_ssthresh_metrics_save",
1223 .data = &init_net.ipv4.sysctl_tcp_no_ssthresh_metrics_save,
4ecc1baf 1224 .maxlen = sizeof(u8),
65e6d901 1225 .mode = 0644,
4ecc1baf 1226 .proc_handler = proc_dou8vec_minmax,
65e6d901
KYY		 1227 .extra1 = SYSCTL_ZERO,
1228 .extra2 = SYSCTL_ONE,
1229 },
4540c0cf
ED		 1230 {
1231 .procname = "tcp_moderate_rcvbuf",
1232 .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
4ecc1baf 1233 .maxlen = sizeof(u8),
4540c0cf 1234 .mode = 0644,
4ecc1baf 1235 .proc_handler = proc_dou8vec_minmax,
4540c0cf 1236 },
d06a9904
ED		 1237 {
1238 .procname = "tcp_tso_win_divisor",
1239 .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
4ecc1baf 1240 .maxlen = sizeof(u8),
d06a9904 1241 .mode = 0644,
4ecc1baf 1242 .proc_handler = proc_dou8vec_minmax,
d06a9904 1243 },
ceef9ab6
ED		 1244 {
1245 .procname = "tcp_workaround_signed_windows",
1246 .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
4ecc1baf 1247 .maxlen = sizeof(u8),
ceef9ab6 1248 .mode = 0644,
4ecc1baf 1249 .proc_handler = proc_dou8vec_minmax,
ceef9ab6 1250 },
9184d8bb
ED		 1251 {
1252 .procname = "tcp_limit_output_bytes",
1253 .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
1254 .maxlen = sizeof(int),
1255 .mode = 0644,
1256 .proc_handler = proc_dointvec
1257 },
b530b681
ED		 1258 {
1259 .procname = "tcp_challenge_ack_limit",
1260 .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit,
1261 .maxlen = sizeof(int),
1262 .mode = 0644,
1263 .proc_handler = proc_dointvec
1264 },
26e9596e
ED		 1265 {
1266 .procname = "tcp_min_tso_segs",
1267 .data = &init_net.ipv4.sysctl_tcp_min_tso_segs,
4ecc1baf 1268 .maxlen = sizeof(u8),
26e9596e 1269 .mode = 0644,
4ecc1baf 1270 .proc_handler = proc_dou8vec_minmax,
eec4844f 1271 .extra1 = SYSCTL_ONE,
26e9596e 1272 },
bd239704
ED		 1273 {
1274 .procname = "tcp_min_rtt_wlen",
1275 .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
1276 .maxlen = sizeof(int),
1277 .mode = 0644,
19fad20d 1278 .proc_handler = proc_dointvec_minmax,
eec4844f 1279 .extra1 = SYSCTL_ZERO,
19fad20d 1280 .extra2 = &one_day_secs
bd239704 1281 },
790f00e1
ED		 1282 {
1283 .procname = "tcp_autocorking",
1284 .data = &init_net.ipv4.sysctl_tcp_autocorking,
4ecc1baf 1285 .maxlen = sizeof(u8),
790f00e1 1286 .mode = 0644,
4ecc1baf 1287 .proc_handler = proc_dou8vec_minmax,
eec4844f
MC		 1288 .extra1 = SYSCTL_ZERO,
1289 .extra2 = SYSCTL_ONE,
790f00e1 1290 },
4170ba6b
ED		 1291 {
1292 .procname = "tcp_invalid_ratelimit",
1293 .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit,
1294 .maxlen = sizeof(int),
1295 .mode = 0644,
1296 .proc_handler = proc_dointvec_ms_jiffies,
1297 },
23a7102a
ED		 1298 {
1299 .procname = "tcp_pacing_ss_ratio",
1300 .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,
1301 .maxlen = sizeof(int),
1302 .mode = 0644,
1303 .proc_handler = proc_dointvec_minmax,
eec4844f 1304 .extra1 = SYSCTL_ZERO,
23a7102a
ED		 1305 .extra2 = &thousand,
1306 },
c26e91f8
ED		 1307 {
1308 .procname = "tcp_pacing_ca_ratio",
1309 .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio,
1310 .maxlen = sizeof(int),
1311 .mode = 0644,
1312 .proc_handler = proc_dointvec_minmax,
eec4844f 1313 .extra1 = SYSCTL_ZERO,
c26e91f8
ED		 1314 .extra2 = &thousand,
1315 },
356d1833
ED		 1316 {
1317 .procname = "tcp_wmem",
1318 .data = &init_net.ipv4.sysctl_tcp_wmem,
1319 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem),
1320 .mode = 0644,
1321 .proc_handler = proc_dointvec_minmax,
eec4844f 1322 .extra1 = SYSCTL_ONE,
356d1833
ED		 1323 },
1324 {
1325 .procname = "tcp_rmem",
1326 .data = &init_net.ipv4.sysctl_tcp_rmem,
1327 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem),
1328 .mode = 0644,
1329 .proc_handler = proc_dointvec_minmax,
eec4844f 1330 .extra1 = SYSCTL_ONE,
356d1833 1331 },
6d82aa24
ED		 1332 {
1333 .procname = "tcp_comp_sack_delay_ns",
1334 .data = &init_net.ipv4.sysctl_tcp_comp_sack_delay_ns,
1335 .maxlen = sizeof(unsigned long),
1336 .mode = 0644,
1337 .proc_handler = proc_doulongvec_minmax,
1338 },
a70437cc
ED		 1339 {
1340 .procname = "tcp_comp_sack_slack_ns",
1341 .data = &init_net.ipv4.sysctl_tcp_comp_sack_slack_ns,
1342 .maxlen = sizeof(unsigned long),
1343 .mode = 0644,
1344 .proc_handler = proc_doulongvec_minmax,
1345 },
9c21d2fc
ED		 1346 {
1347 .procname = "tcp_comp_sack_nr",
1348 .data = &init_net.ipv4.sysctl_tcp_comp_sack_nr,
1c3289c9 1349 .maxlen = sizeof(u8),
9c21d2fc 1350 .mode = 0644,
1c3289c9 1351 .proc_handler = proc_dou8vec_minmax,
eec4844f 1352 .extra1 = SYSCTL_ZERO,
9c21d2fc 1353 },
ac8f1710
WW		 1354 {
1355 .procname = "tcp_reflect_tos",
1356 .data = &init_net.ipv4.sysctl_tcp_reflect_tos,
4ecc1baf 1357 .maxlen = sizeof(u8),
ac8f1710 1358 .mode = 0644,
4ecc1baf 1359 .proc_handler = proc_dou8vec_minmax,
ac8f1710
WW		 1360 .extra1 = SYSCTL_ZERO,
1361 .extra2 = SYSCTL_ONE,
1362 },
1e802951
TZ		 1363 {
1364 .procname = "udp_rmem_min",
1365 .data = &init_net.ipv4.sysctl_udp_rmem_min,
1366 .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min),
1367 .mode = 0644,
1368 .proc_handler = proc_dointvec_minmax,
eec4844f 1369 .extra1 = SYSCTL_ONE
1e802951
TZ		 1370 },
1371 {
1372 .procname = "udp_wmem_min",
1373 .data = &init_net.ipv4.sysctl_udp_wmem_min,
1374 .maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min),
1375 .mode = 0644,
1376 .proc_handler = proc_dointvec_minmax,
eec4844f 1377 .extra1 = SYSCTL_ONE
1e802951 1378 },
680aea08
AC		 1379 {
1380 .procname = "fib_notify_on_flag_change",
1381 .data = &init_net.ipv4.sysctl_fib_notify_on_flag_change,
b2908fac 1382 .maxlen = sizeof(u8),
680aea08 1383 .mode = 0644,
b2908fac 1384 .proc_handler = proc_dou8vec_minmax,
680aea08 1385 .extra1 = SYSCTL_ZERO,
648106c3 1386 .extra2 = &two,
680aea08 1387 },
68528f09
PE		 1388 { }
1389};
1390
1577519d
PE		 1391static __net_init int ipv4_sysctl_init_net(struct net *net)
1392{
68528f09
PE		 1393 struct ctl_table *table;
1394
1395 table = ipv4_net_table;
09ad9bc7 1396 if (!net_eq(net, &init_net)) {
0a6fa23d
EB		 1397 int i;
1398
68528f09 1399 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
51456b29 1400 if (!table)
68528f09
PE		 1401 goto err_alloc;
1402
97684f09
JR		 1403 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) {
1404 if (table[i].data) {
1405 /* Update the variables to point into
1406 * the current struct net
1407 */
1408 table[i].data += (void *)net - (void *)&init_net;
1409 } else {
1410 /* Entries without data pointer are global;
1411 * Make them read-only in non-init_net ns
1412 */
1413 table[i].mode &= ~0222;
1414 }
1415 }
68528f09
PE		 1416 }
1417
ec8f23ce 1418 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
51456b29 1419 if (!net->ipv4.ipv4_hdr)
68528f09
PE		 1420 goto err_reg;
1421
122ff243
WC		 1422 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1423 if (!net->ipv4.sysctl_local_reserved_ports)
1424 goto err_ports;
1425
1577519d 1426 return 0;
68528f09 1427
122ff243
WC		 1428err_ports:
1429 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
68528f09 1430err_reg:
09ad9bc7 1431 if (!net_eq(net, &init_net))
68528f09
PE		 1432 kfree(table);
1433err_alloc:
1434 return -ENOMEM;
1577519d
PE		 1435}
1436
1437static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1438{
68528f09
PE		 1439 struct ctl_table *table;
1440
122ff243 1441 kfree(net->ipv4.sysctl_local_reserved_ports);
68528f09
PE		 1442 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1443 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1444 kfree(table);
1577519d
PE		 1445}
1446
1447static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1448 .init = ipv4_sysctl_init_net,
1449 .exit = ipv4_sysctl_exit_net,
1450};
1451
3e37c3f9
PE		 1452static __init int sysctl_ipv4_init(void)
1453{
1454 struct ctl_table_header *hdr;
1455
ec8f23ce 1456 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
51456b29 1457 if (!hdr)
1577519d
PE		 1458 return -ENOMEM;
1459
1460 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
5dd3df10 1461 unregister_net_sysctl_table(hdr);
1577519d
PE		 1462 return -ENOMEM;
1463 }
1464
1465 return 0;
3e37c3f9
PE		 1466}
1467
1468__initcall(sysctl_ipv4_init);
Linux 6.x block layer and io_uring tree(s)