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tcp: Namespace-ify sysctl_tcp_pacing_ss_ratio
[linux-2.6-block.git] / net / ipv4 / sysctl_net_ipv4.c
CommitLineData
1da177e4
LT		 1/*
2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
3 *
1da177e4
LT		 4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
6 */
7
8#include <linux/mm.h>
9#include <linux/module.h>
10#include <linux/sysctl.h>
20380731 11#include <linux/igmp.h>
14c85021 12#include <linux/inetdevice.h>
227b60f5 13#include <linux/seqlock.h>
3e37c3f9 14#include <linux/init.h>
5a0e3ad6 15#include <linux/slab.h>
c319b4d7 16#include <linux/nsproxy.h>
3dc43e3e 17#include <linux/swap.h>
1da177e4 18#include <net/snmp.h>
20380731 19#include <net/icmp.h>
1da177e4
LT		 20#include <net/ip.h>
21#include <net/route.h>
22#include <net/tcp.h>
95766fff 23#include <net/udp.h>
446fda4f 24#include <net/cipso_ipv4.h>
04128f23 25#include <net/inet_frag.h>
c319b4d7 26#include <net/ping.h>
dddb64bc 27#include <net/protocol.h>
1da177e4 28
89cee8b1 29static int zero;
cdda8891 30static int one = 1;
6ba8a3b1 31static int four = 4;
43e122b0 32static int thousand = 1000;
95bd09eb 33static int gso_max_segs = GSO_MAX_SEGS;
e905a9ed 34static int tcp_retr1_max = 255;
1da177e4
LT		 35static int ip_local_port_range_min[] = { 1, 1 };
36static int ip_local_port_range_max[] = { 65535, 65535 };
0147fc05
AD		 37static int tcp_adv_win_scale_min = -31;
38static int tcp_adv_win_scale_max = 31;
4548b683
KJ		 39static int ip_privileged_port_min;
40static int ip_privileged_port_max = 65535;
249fab77
ED		 41static int ip_ttl_min = 1;
42static int ip_ttl_max = 255;
651e9271
MT		 43static int tcp_syn_retries_min = 1;
44static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
c319b4d7
VK		 45static int ip_ping_group_range_min[] = { 0, 0 };
46static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
1da177e4 47
b6690b14
FW		 48/* obsolete */
49static int sysctl_tcp_low_latency __read_mostly;
50
227b60f5 51/* Update system visible IP port range */
0bbf87d8 52static void set_local_port_range(struct net *net, int range[2])
227b60f5 53{
ed2dfd90
ED		 54 bool same_parity = !((range[0] ^ range[1]) & 1);
55
4ee3bd4a 56 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
ed2dfd90
ED		 57 if (same_parity && !net->ipv4.ip_local_ports.warned) {
58 net->ipv4.ip_local_ports.warned = true;
59 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
60 }
c9d8f1a6
CW		 61 net->ipv4.ip_local_ports.range[0] = range[0];
62 net->ipv4.ip_local_ports.range[1] = range[1];
4ee3bd4a 63 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
227b60f5
SH		 64}
65
66/* Validate changes from /proc interface. */
fe2c6338 67static int ipv4_local_port_range(struct ctl_table *table, int write,
227b60f5
SH		 68 void __user *buffer,
69 size_t *lenp, loff_t *ppos)
70{
0bbf87d8 71 struct net *net =
c9d8f1a6 72 container_of(table->data, struct net, ipv4.ip_local_ports.range);
227b60f5 73 int ret;
3c689b73 74 int range[2];
fe2c6338 75 struct ctl_table tmp = {
227b60f5
SH		 76 .data = &range,
77 .maxlen = sizeof(range),
78 .mode = table->mode,
79 .extra1 = &ip_local_port_range_min,
80 .extra2 = &ip_local_port_range_max,
81 };
82
0bbf87d8
EB		 83 inet_get_local_port_range(net, &range[0], &range[1]);
84
8d65af78 85 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
227b60f5
SH		 86
87 if (write && ret == 0) {
4548b683
KJ		 88 /* Ensure that the upper limit is not smaller than the lower,
89 * and that the lower does not encroach upon the privileged
90 * port limit.
91 */
92 if ((range[1] < range[0]) ||
93 (range[0] < net->ipv4.sysctl_ip_prot_sock))
227b60f5
SH		 94 ret = -EINVAL;
95 else
0bbf87d8 96 set_local_port_range(net, range);
227b60f5
SH		 97 }
98
99 return ret;
100}
101
4548b683
KJ		 102/* Validate changes from /proc interface. */
103static int ipv4_privileged_ports(struct ctl_table *table, int write,
104 void __user *buffer, size_t *lenp, loff_t *ppos)
105{
106 struct net *net = container_of(table->data, struct net,
107 ipv4.sysctl_ip_prot_sock);
108 int ret;
109 int pports;
110 int range[2];
111 struct ctl_table tmp = {
112 .data = &pports,
113 .maxlen = sizeof(pports),
114 .mode = table->mode,
115 .extra1 = &ip_privileged_port_min,
116 .extra2 = &ip_privileged_port_max,
117 };
118
119 pports = net->ipv4.sysctl_ip_prot_sock;
120
121 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
122
123 if (write && ret == 0) {
124 inet_get_local_port_range(net, &range[0], &range[1]);
125 /* Ensure that the local port range doesn't overlap with the
126 * privileged port range.
127 */
128 if (range[0] < pports)
129 ret = -EINVAL;
130 else
131 net->ipv4.sysctl_ip_prot_sock = pports;
132 }
133
134 return ret;
135}
c319b4d7 136
7064d16e 137static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
c319b4d7 138{
7064d16e 139 kgid_t *data = table->data;
0bbf87d8 140 struct net *net =
ba6b918a 141 container_of(table->data, struct net, ipv4.ping_group_range.range);
95c96174 142 unsigned int seq;
c319b4d7 143 do {
396a30cc 144 seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 145
146 *low = data[0];
147 *high = data[1];
396a30cc 148 } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
c319b4d7
VK		 149}
150
151/* Update system visible IP port range */
7064d16e 152static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
c319b4d7 153{
7064d16e 154 kgid_t *data = table->data;
0bbf87d8 155 struct net *net =
ba6b918a 156 container_of(table->data, struct net, ipv4.ping_group_range.range);
396a30cc 157 write_seqlock(&net->ipv4.ping_group_range.lock);
7064d16e
EB		 158 data[0] = low;
159 data[1] = high;
396a30cc 160 write_sequnlock(&net->ipv4.ping_group_range.lock);
c319b4d7
VK		 161}
162
163/* Validate changes from /proc interface. */
fe2c6338 164static int ipv4_ping_group_range(struct ctl_table *table, int write,
c319b4d7
VK		 165 void __user *buffer,
166 size_t *lenp, loff_t *ppos)
167{
7064d16e 168 struct user_namespace *user_ns = current_user_ns();
c319b4d7 169 int ret;
7064d16e
EB		 170 gid_t urange[2];
171 kgid_t low, high;
fe2c6338 172 struct ctl_table tmp = {
7064d16e
EB		 173 .data = &urange,
174 .maxlen = sizeof(urange),
c319b4d7
VK		 175 .mode = table->mode,
176 .extra1 = &ip_ping_group_range_min,
177 .extra2 = &ip_ping_group_range_max,
178 };
179
7064d16e
EB		 180 inet_get_ping_group_range_table(table, &low, &high);
181 urange[0] = from_kgid_munged(user_ns, low);
182 urange[1] = from_kgid_munged(user_ns, high);
c319b4d7
VK		 183 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
184
7064d16e
EB		 185 if (write && ret == 0) {
186 low = make_kgid(user_ns, urange[0]);
187 high = make_kgid(user_ns, urange[1]);
188 if (!gid_valid(low) || !gid_valid(high) ||
189 (urange[1] < urange[0]) || gid_lt(high, low)) {
190 low = make_kgid(&init_user_ns, 1);
191 high = make_kgid(&init_user_ns, 0);
192 }
193 set_ping_group_range(table, low, high);
194 }
c319b4d7
VK		 195
196 return ret;
197}
198
fe2c6338 199static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
317a76f9
SH		 200 void __user *buffer, size_t *lenp, loff_t *ppos)
201{
202 char val[TCP_CA_NAME_MAX];
fe2c6338 203 struct ctl_table tbl = {
317a76f9
SH		 204 .data = val,
205 .maxlen = TCP_CA_NAME_MAX,
206 };
207 int ret;
208
209 tcp_get_default_congestion_control(val);
210
8d65af78 211 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
317a76f9
SH		 212 if (write && ret == 0)
213 ret = tcp_set_default_congestion_control(val);
214 return ret;
215}
216
fe2c6338 217static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
8d65af78 218 int write,
3ff825b2
SH		 219 void __user *buffer, size_t *lenp,
220 loff_t *ppos)
221{
fe2c6338 222 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
3ff825b2
SH		 223 int ret;
224
225 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
226 if (!tbl.data)
227 return -ENOMEM;
228 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
8d65af78 229 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
3ff825b2
SH		 230 kfree(tbl.data);
231 return ret;
232}
233
fe2c6338 234static int proc_allowed_congestion_control(struct ctl_table *ctl,
8d65af78 235 int write,
ce7bc3bf
SH		 236 void __user *buffer, size_t *lenp,
237 loff_t *ppos)
238{
fe2c6338 239 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
ce7bc3bf
SH		 240 int ret;
241
242 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
243 if (!tbl.data)
244 return -ENOMEM;
245
246 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
8d65af78 247 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ce7bc3bf
SH		 248 if (write && ret == 0)
249 ret = tcp_set_allowed_congestion_control(tbl.data);
250 kfree(tbl.data);
251 return ret;
252}
253
43713848 254static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
fe2c6338
JP		 255 void __user *buffer, size_t *lenp,
256 loff_t *ppos)
10467163 257{
43713848
HY		 258 struct net *net = container_of(table->data, struct net,
259 ipv4.sysctl_tcp_fastopen);
fe2c6338 260 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
10467163
JC		 261 struct tcp_fastopen_context *ctxt;
262 int ret;
263 u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
264
265 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
266 if (!tbl.data)
267 return -ENOMEM;
268
269 rcu_read_lock();
43713848 270 ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx);
10467163
JC		 271 if (ctxt)
272 memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
0e24c4fc
AC		 273 else
274 memset(user_key, 0, sizeof(user_key));
10467163
JC		 275 rcu_read_unlock();
276
277 snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
278 user_key[0], user_key[1], user_key[2], user_key[3]);
279 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
280
281 if (write && ret == 0) {
282 if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
283 user_key + 2, user_key + 3) != 4) {
284 ret = -EINVAL;
285 goto bad_key;
286 }
1fba70e5
YC		 287 tcp_fastopen_reset_cipher(net, NULL, user_key,
288 TCP_FASTOPEN_KEY_LENGTH);
10467163
JC		 289 }
290
291bad_key:
292 pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
293 user_key[0], user_key[1], user_key[2], user_key[3],
294 (char *)tbl.data, ret);
295 kfree(tbl.data);
296 return ret;
297}
298
dddb64bc 299static void proc_configure_early_demux(int enabled, int protocol)
300{
301 struct net_protocol *ipprot;
302#if IS_ENABLED(CONFIG_IPV6)
303 struct inet6_protocol *ip6prot;
304#endif
305
58c4c6a3
DA		 306 rcu_read_lock();
307
dddb64bc 308 ipprot = rcu_dereference(inet_protos[protocol]);
309 if (ipprot)
310 ipprot->early_demux = enabled ? ipprot->early_demux_handler :
311 NULL;
312
313#if IS_ENABLED(CONFIG_IPV6)
314 ip6prot = rcu_dereference(inet6_protos[protocol]);
315 if (ip6prot)
316 ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
317 NULL;
318#endif
58c4c6a3 319 rcu_read_unlock();
dddb64bc 320}
321
322static int proc_tcp_early_demux(struct ctl_table *table, int write,
323 void __user *buffer, size_t *lenp, loff_t *ppos)
324{
325 int ret = 0;
326
327 ret = proc_dointvec(table, write, buffer, lenp, ppos);
328
329 if (write && !ret) {
330 int enabled = init_net.ipv4.sysctl_tcp_early_demux;
331
332 proc_configure_early_demux(enabled, IPPROTO_TCP);
333 }
334
335 return ret;
336}
337
338static int proc_udp_early_demux(struct ctl_table *table, int write,
339 void __user *buffer, size_t *lenp, loff_t *ppos)
340{
341 int ret = 0;
342
343 ret = proc_dointvec(table, write, buffer, lenp, ppos);
344
345 if (write && !ret) {
346 int enabled = init_net.ipv4.sysctl_udp_early_demux;
347
348 proc_configure_early_demux(enabled, IPPROTO_UDP);
349 }
350
351 return ret;
352}
353
cf1ef3f0
WW		 354static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table,
355 int write,
356 void __user *buffer,
357 size_t *lenp, loff_t *ppos)
358{
3733be14
HY		 359 struct net *net = container_of(table->data, struct net,
360 ipv4.sysctl_tcp_fastopen_blackhole_timeout);
cf1ef3f0
WW		 361 int ret;
362
363 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
364 if (write && ret == 0)
3733be14 365 atomic_set(&net->ipv4.tfo_active_disable_times, 0);
734942cc
DW		 366
367 return ret;
368}
369
370static int proc_tcp_available_ulp(struct ctl_table *ctl,
371 int write,
372 void __user *buffer, size_t *lenp,
373 loff_t *ppos)
374{
375 struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
376 int ret;
377
378 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
379 if (!tbl.data)
380 return -ENOMEM;
381 tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
382 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
383 kfree(tbl.data);
384
cf1ef3f0
WW		 385 return ret;
386}
387
3e37c3f9 388static struct ctl_table ipv4_table[] = {
1da177e4 389 {
1da177e4
LT		 390 .procname = "tcp_max_orphans",
391 .data = &sysctl_tcp_max_orphans,
392 .maxlen = sizeof(int),
393 .mode = 0644,
6d9f239a 394 .proc_handler = proc_dointvec
1da177e4 395 },
1da177e4 396 {
1da177e4
LT		 397 .procname = "inet_peer_threshold",
398 .data = &inet_peer_threshold,
399 .maxlen = sizeof(int),
400 .mode = 0644,
6d9f239a 401 .proc_handler = proc_dointvec
1da177e4
LT		 402 },
403 {
1da177e4
LT		 404 .procname = "inet_peer_minttl",
405 .data = &inet_peer_minttl,
406 .maxlen = sizeof(int),
407 .mode = 0644,
6d9f239a 408 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 409 },
410 {
1da177e4
LT		 411 .procname = "inet_peer_maxttl",
412 .data = &inet_peer_maxttl,
413 .maxlen = sizeof(int),
414 .mode = 0644,
6d9f239a 415 .proc_handler = proc_dointvec_jiffies,
1da177e4 416 },
a4fe34bf
EB		 417 {
418 .procname = "tcp_mem",
419 .maxlen = sizeof(sysctl_tcp_mem),
420 .data = &sysctl_tcp_mem,
421 .mode = 0644,
422 .proc_handler = proc_doulongvec_minmax,
423 },
1da177e4 424 {
1da177e4
LT		 425 .procname = "tcp_wmem",
426 .data = &sysctl_tcp_wmem,
427 .maxlen = sizeof(sysctl_tcp_wmem),
428 .mode = 0644,
cdda8891 429 .proc_handler = proc_dointvec_minmax,
5d37852b 430 .extra1 = &one,
1da177e4
LT		 431 },
432 {
1da177e4
LT		 433 .procname = "tcp_rmem",
434 .data = &sysctl_tcp_rmem,
435 .maxlen = sizeof(sysctl_tcp_rmem),
436 .mode = 0644,
cdda8891 437 .proc_handler = proc_dointvec_minmax,
5d37852b 438 .extra1 = &one,
1da177e4 439 },
1da177e4 440 {
1da177e4
LT		 441 .procname = "tcp_low_latency",
442 .data = &sysctl_tcp_low_latency,
443 .maxlen = sizeof(int),
444 .mode = 0644,
6d9f239a 445 .proc_handler = proc_dointvec
1da177e4 446 },
1da177e4 447 {
317a76f9 448 .procname = "tcp_congestion_control",
1da177e4 449 .mode = 0644,
317a76f9 450 .maxlen = TCP_CA_NAME_MAX,
6d9f239a 451 .proc_handler = proc_tcp_congestion_control,
1da177e4 452 },
446fda4f
PM		 453#ifdef CONFIG_NETLABEL
454 {
446fda4f
PM		 455 .procname = "cipso_cache_enable",
456 .data = &cipso_v4_cache_enabled,
457 .maxlen = sizeof(int),
458 .mode = 0644,
6d9f239a 459 .proc_handler = proc_dointvec,
446fda4f
PM		 460 },
461 {
446fda4f
PM		 462 .procname = "cipso_cache_bucket_size",
463 .data = &cipso_v4_cache_bucketsize,
464 .maxlen = sizeof(int),
465 .mode = 0644,
6d9f239a 466 .proc_handler = proc_dointvec,
446fda4f
PM		 467 },
468 {
446fda4f
PM		 469 .procname = "cipso_rbm_optfmt",
470 .data = &cipso_v4_rbm_optfmt,
471 .maxlen = sizeof(int),
472 .mode = 0644,
6d9f239a 473 .proc_handler = proc_dointvec,
446fda4f
PM		 474 },
475 {
446fda4f
PM		 476 .procname = "cipso_rbm_strictvalid",
477 .data = &cipso_v4_rbm_strictvalid,
478 .maxlen = sizeof(int),
479 .mode = 0644,
6d9f239a 480 .proc_handler = proc_dointvec,
446fda4f
PM		 481 },
482#endif /* CONFIG_NETLABEL */
3ff825b2 483 {
3ff825b2
SH		 484 .procname = "tcp_available_congestion_control",
485 .maxlen = TCP_CA_BUF_MAX,
486 .mode = 0444,
6d9f239a 487 .proc_handler = proc_tcp_available_congestion_control,
3ff825b2 488 },
ce7bc3bf 489 {
ce7bc3bf
SH		 490 .procname = "tcp_allowed_congestion_control",
491 .maxlen = TCP_CA_BUF_MAX,
492 .mode = 0644,
6d9f239a 493 .proc_handler = proc_allowed_congestion_control,
ce7bc3bf 494 },
43e122b0
ED		 495 {
496 .procname = "tcp_pacing_ca_ratio",
497 .data = &sysctl_tcp_pacing_ca_ratio,
498 .maxlen = sizeof(int),
499 .mode = 0644,
500 .proc_handler = proc_dointvec_minmax,
501 .extra1 = &zero,
502 .extra2 = &thousand,
503 },
734942cc
DW		 504 {
505 .procname = "tcp_available_ulp",
506 .maxlen = TCP_ULP_BUF_MAX,
507 .mode = 0444,
508 .proc_handler = proc_tcp_available_ulp,
509 },
4cdf507d
ED		 510 {
511 .procname = "icmp_msgs_per_sec",
512 .data = &sysctl_icmp_msgs_per_sec,
513 .maxlen = sizeof(int),
514 .mode = 0644,
515 .proc_handler = proc_dointvec_minmax,
516 .extra1 = &zero,
517 },
518 {
519 .procname = "icmp_msgs_burst",
520 .data = &sysctl_icmp_msgs_burst,
521 .maxlen = sizeof(int),
522 .mode = 0644,
523 .proc_handler = proc_dointvec_minmax,
524 .extra1 = &zero,
525 },
95766fff 526 {
95766fff
HA		 527 .procname = "udp_mem",
528 .data = &sysctl_udp_mem,
529 .maxlen = sizeof(sysctl_udp_mem),
530 .mode = 0644,
8d987e5c 531 .proc_handler = proc_doulongvec_minmax,
95766fff
HA		 532 },
533 {
95766fff
HA		 534 .procname = "udp_rmem_min",
535 .data = &sysctl_udp_rmem_min,
536 .maxlen = sizeof(sysctl_udp_rmem_min),
537 .mode = 0644,
6d9f239a 538 .proc_handler = proc_dointvec_minmax,
5d37852b 539 .extra1 = &one
95766fff
HA		 540 },
541 {
95766fff
HA		 542 .procname = "udp_wmem_min",
543 .data = &sysctl_udp_wmem_min,
544 .maxlen = sizeof(sysctl_udp_wmem_min),
545 .mode = 0644,
6d9f239a 546 .proc_handler = proc_dointvec_minmax,
5d37852b 547 .extra1 = &one
95766fff 548 },
f8572d8f 549 { }
1da177e4 550};
3e37c3f9 551
68528f09
PE		 552static struct ctl_table ipv4_net_table[] = {
553 {
68528f09
PE		 554 .procname = "icmp_echo_ignore_all",
555 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
556 .maxlen = sizeof(int),
557 .mode = 0644,
6d9f239a 558 .proc_handler = proc_dointvec
68528f09
PE		 559 },
560 {
68528f09
PE		 561 .procname = "icmp_echo_ignore_broadcasts",
562 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
563 .maxlen = sizeof(int),
564 .mode = 0644,
6d9f239a 565 .proc_handler = proc_dointvec
68528f09
PE		 566 },
567 {
68528f09
PE		 568 .procname = "icmp_ignore_bogus_error_responses",
569 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
570 .maxlen = sizeof(int),
571 .mode = 0644,
6d9f239a 572 .proc_handler = proc_dointvec
68528f09
PE		 573 },
574 {
68528f09
PE		 575 .procname = "icmp_errors_use_inbound_ifaddr",
576 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
577 .maxlen = sizeof(int),
578 .mode = 0644,
6d9f239a 579 .proc_handler = proc_dointvec
68528f09
PE		 580 },
581 {
68528f09
PE		 582 .procname = "icmp_ratelimit",
583 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
584 .maxlen = sizeof(int),
585 .mode = 0644,
6d9f239a 586 .proc_handler = proc_dointvec_ms_jiffies,
68528f09
PE		 587 },
588 {
68528f09
PE		 589 .procname = "icmp_ratemask",
590 .data = &init_net.ipv4.sysctl_icmp_ratemask,
591 .maxlen = sizeof(int),
592 .mode = 0644,
6d9f239a 593 .proc_handler = proc_dointvec
68528f09 594 },
c319b4d7
VK		 595 {
596 .procname = "ping_group_range",
ba6b918a 597 .data = &init_net.ipv4.ping_group_range.range,
7064d16e 598 .maxlen = sizeof(gid_t)*2,
c319b4d7
VK		 599 .mode = 0644,
600 .proc_handler = ipv4_ping_group_range,
601 },
5d134f1c
HFS		 602 {
603 .procname = "tcp_ecn",
604 .data = &init_net.ipv4.sysctl_tcp_ecn,
605 .maxlen = sizeof(int),
606 .mode = 0644,
607 .proc_handler = proc_dointvec
608 },
49213555
DB		 609 {
610 .procname = "tcp_ecn_fallback",
611 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
612 .maxlen = sizeof(int),
613 .mode = 0644,
614 .proc_handler = proc_dointvec
615 },
287b7f38
NB		 616 {
617 .procname = "ip_dynaddr",
618 .data = &init_net.ipv4.sysctl_ip_dynaddr,
619 .maxlen = sizeof(int),
620 .mode = 0644,
621 .proc_handler = proc_dointvec
622 },
e21145a9
NB		 623 {
624 .procname = "ip_early_demux",
625 .data = &init_net.ipv4.sysctl_ip_early_demux,
626 .maxlen = sizeof(int),
627 .mode = 0644,
628 .proc_handler = proc_dointvec
629 },
dddb64bc 630 {
631 .procname = "udp_early_demux",
632 .data = &init_net.ipv4.sysctl_udp_early_demux,
633 .maxlen = sizeof(int),
634 .mode = 0644,
635 .proc_handler = proc_udp_early_demux
636 },
637 {
638 .procname = "tcp_early_demux",
639 .data = &init_net.ipv4.sysctl_tcp_early_demux,
640 .maxlen = sizeof(int),
641 .mode = 0644,
642 .proc_handler = proc_tcp_early_demux
643 },
fa50d974
NB		 644 {
645 .procname = "ip_default_ttl",
646 .data = &init_net.ipv4.sysctl_ip_default_ttl,
647 .maxlen = sizeof(int),
648 .mode = 0644,
649 .proc_handler = proc_dointvec_minmax,
650 .extra1 = &ip_ttl_min,
651 .extra2 = &ip_ttl_max,
652 },
0bbf87d8
EB		 653 {
654 .procname = "ip_local_port_range",
c9d8f1a6
CW		 655 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
656 .data = &init_net.ipv4.ip_local_ports.range,
0bbf87d8
EB		 657 .mode = 0644,
658 .proc_handler = ipv4_local_port_range,
659 },
122ff243
WC		 660 {
661 .procname = "ip_local_reserved_ports",
662 .data = &init_net.ipv4.sysctl_local_reserved_ports,
663 .maxlen = 65536,
664 .mode = 0644,
665 .proc_handler = proc_do_large_bitmap,
666 },
974eda11
HFS		 667 {
668 .procname = "ip_no_pmtu_disc",
669 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
670 .maxlen = sizeof(int),
671 .mode = 0644,
672 .proc_handler = proc_dointvec
673 },
f87c10a8
HFS		 674 {
675 .procname = "ip_forward_use_pmtu",
676 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
677 .maxlen = sizeof(int),
678 .mode = 0644,
679 .proc_handler = proc_dointvec,
680 },
49a60158
VB		 681 {
682 .procname = "ip_nonlocal_bind",
683 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
684 .maxlen = sizeof(int),
685 .mode = 0644,
686 .proc_handler = proc_dointvec
687 },
e110861f
LC		 688 {
689 .procname = "fwmark_reflect",
690 .data = &init_net.ipv4.sysctl_fwmark_reflect,
691 .maxlen = sizeof(int),
692 .mode = 0644,
693 .proc_handler = proc_dointvec,
694 },
84f39b08
LC		 695 {
696 .procname = "tcp_fwmark_accept",
697 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
698 .maxlen = sizeof(int),
699 .mode = 0644,
700 .proc_handler = proc_dointvec,
701 },
6dd9a14e
DA		 702#ifdef CONFIG_NET_L3_MASTER_DEV
703 {
704 .procname = "tcp_l3mdev_accept",
705 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
706 .maxlen = sizeof(int),
707 .mode = 0644,
708 .proc_handler = proc_dointvec_minmax,
709 .extra1 = &zero,
710 .extra2 = &one,
711 },
712#endif
b0f9ca53
FD		 713 {
714 .procname = "tcp_mtu_probing",
715 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
716 .maxlen = sizeof(int),
717 .mode = 0644,
718 .proc_handler = proc_dointvec,
719 },
720 {
721 .procname = "tcp_base_mss",
722 .data = &init_net.ipv4.sysctl_tcp_base_mss,
723 .maxlen = sizeof(int),
724 .mode = 0644,
725 .proc_handler = proc_dointvec,
726 },
6b58e0a5
FD		 727 {
728 .procname = "tcp_probe_threshold",
729 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
730 .maxlen = sizeof(int),
731 .mode = 0644,
732 .proc_handler = proc_dointvec,
733 },
05cbc0db
FD		 734 {
735 .procname = "tcp_probe_interval",
736 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
737 .maxlen = sizeof(int),
738 .mode = 0644,
739 .proc_handler = proc_dointvec,
740 },
df2cf4a7
PD		 741 {
742 .procname = "igmp_link_local_mcast_reports",
87a8a2ae 743 .data = &init_net.ipv4.sysctl_igmp_llm_reports,
df2cf4a7
PD		 744 .maxlen = sizeof(int),
745 .mode = 0644,
746 .proc_handler = proc_dointvec
747 },
815c5270
NB		 748 {
749 .procname = "igmp_max_memberships",
750 .data = &init_net.ipv4.sysctl_igmp_max_memberships,
751 .maxlen = sizeof(int),
752 .mode = 0644,
753 .proc_handler = proc_dointvec
754 },
166b6b2d
NB		 755 {
756 .procname = "igmp_max_msf",
757 .data = &init_net.ipv4.sysctl_igmp_max_msf,
758 .maxlen = sizeof(int),
759 .mode = 0644,
760 .proc_handler = proc_dointvec
761 },
165094af
NB		 762#ifdef CONFIG_IP_MULTICAST
763 {
764 .procname = "igmp_qrv",
765 .data = &init_net.ipv4.sysctl_igmp_qrv,
766 .maxlen = sizeof(int),
767 .mode = 0644,
768 .proc_handler = proc_dointvec_minmax,
769 .extra1 = &one
770 },
771#endif
13b287e8
NB		 772 {
773 .procname = "tcp_keepalive_time",
774 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
775 .maxlen = sizeof(int),
776 .mode = 0644,
777 .proc_handler = proc_dointvec_jiffies,
778 },
9bd6861b
NB		 779 {
780 .procname = "tcp_keepalive_probes",
781 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
782 .maxlen = sizeof(int),
783 .mode = 0644,
784 .proc_handler = proc_dointvec
785 },
b840d15d
NB		 786 {
787 .procname = "tcp_keepalive_intvl",
788 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
789 .maxlen = sizeof(int),
790 .mode = 0644,
791 .proc_handler = proc_dointvec_jiffies,
792 },
6fa25166
NB		 793 {
794 .procname = "tcp_syn_retries",
795 .data = &init_net.ipv4.sysctl_tcp_syn_retries,
796 .maxlen = sizeof(int),
797 .mode = 0644,
798 .proc_handler = proc_dointvec_minmax,
799 .extra1 = &tcp_syn_retries_min,
800 .extra2 = &tcp_syn_retries_max
801 },
7c083ecb
NB		 802 {
803 .procname = "tcp_synack_retries",
804 .data = &init_net.ipv4.sysctl_tcp_synack_retries,
805 .maxlen = sizeof(int),
806 .mode = 0644,
807 .proc_handler = proc_dointvec
808 },
12ed8244
NB		 809#ifdef CONFIG_SYN_COOKIES
810 {
811 .procname = "tcp_syncookies",
812 .data = &init_net.ipv4.sysctl_tcp_syncookies,
813 .maxlen = sizeof(int),
814 .mode = 0644,
815 .proc_handler = proc_dointvec
816 },
817#endif
1043e25f
NB		 818 {
819 .procname = "tcp_reordering",
820 .data = &init_net.ipv4.sysctl_tcp_reordering,
821 .maxlen = sizeof(int),
822 .mode = 0644,
823 .proc_handler = proc_dointvec
824 },
ae5c3f40
NB		 825 {
826 .procname = "tcp_retries1",
827 .data = &init_net.ipv4.sysctl_tcp_retries1,
828 .maxlen = sizeof(int),
829 .mode = 0644,
830 .proc_handler = proc_dointvec_minmax,
831 .extra2 = &tcp_retr1_max
832 },
c6214a97
NB		 833 {
834 .procname = "tcp_retries2",
835 .data = &init_net.ipv4.sysctl_tcp_retries2,
836 .maxlen = sizeof(int),
837 .mode = 0644,
838 .proc_handler = proc_dointvec
839 },
c402d9be
NB		 840 {
841 .procname = "tcp_orphan_retries",
842 .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
843 .maxlen = sizeof(int),
844 .mode = 0644,
845 .proc_handler = proc_dointvec
846 },
1e579caa
NB		 847 {
848 .procname = "tcp_fin_timeout",
849 .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
850 .maxlen = sizeof(int),
851 .mode = 0644,
852 .proc_handler = proc_dointvec_jiffies,
853 },
4979f2d9
NB		 854 {
855 .procname = "tcp_notsent_lowat",
856 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
857 .maxlen = sizeof(unsigned int),
858 .mode = 0644,
b007f090 859 .proc_handler = proc_douintvec,
4979f2d9 860 },
56ab6b93
HY		 861 {
862 .procname = "tcp_tw_reuse",
863 .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
864 .maxlen = sizeof(int),
865 .mode = 0644,
866 .proc_handler = proc_dointvec
867 },
1946e672
HY		 868 {
869 .procname = "tcp_max_tw_buckets",
870 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
871 .maxlen = sizeof(int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec
874 },
fee83d09
HY		 875 {
876 .procname = "tcp_max_syn_backlog",
877 .data = &init_net.ipv4.sysctl_max_syn_backlog,
878 .maxlen = sizeof(int),
879 .mode = 0644,
880 .proc_handler = proc_dointvec
881 },
e1cfcbe8
HY		 882 {
883 .procname = "tcp_fastopen",
884 .data = &init_net.ipv4.sysctl_tcp_fastopen,
885 .maxlen = sizeof(int),
886 .mode = 0644,
887 .proc_handler = proc_dointvec,
888 },
43713848
HY		 889 {
890 .procname = "tcp_fastopen_key",
891 .mode = 0600,
892 .data = &init_net.ipv4.sysctl_tcp_fastopen,
893 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
894 .proc_handler = proc_tcp_fastopen_key,
895 },
3733be14
HY		 896 {
897 .procname = "tcp_fastopen_blackhole_timeout_sec",
898 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
899 .maxlen = sizeof(int),
900 .mode = 0644,
901 .proc_handler = proc_tfo_blackhole_detect_timeout,
902 .extra1 = &zero,
903 },
a6db4494
DA		 904#ifdef CONFIG_IP_ROUTE_MULTIPATH
905 {
906 .procname = "fib_multipath_use_neigh",
907 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
908 .maxlen = sizeof(int),
909 .mode = 0644,
910 .proc_handler = proc_dointvec_minmax,
bf4e0a3d
NA		 911 .extra1 = &zero,
912 .extra2 = &one,
913 },
914 {
915 .procname = "fib_multipath_hash_policy",
916 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
917 .maxlen = sizeof(int),
918 .mode = 0644,
919 .proc_handler = proc_dointvec_minmax,
a6db4494
DA		 920 .extra1 = &zero,
921 .extra2 = &one,
922 },
923#endif
4548b683
KJ		 924 {
925 .procname = "ip_unprivileged_port_start",
926 .maxlen = sizeof(int),
927 .data = &init_net.ipv4.sysctl_ip_prot_sock,
928 .mode = 0644,
929 .proc_handler = ipv4_privileged_ports,
930 },
63a6fff3
RS		 931#ifdef CONFIG_NET_L3_MASTER_DEV
932 {
933 .procname = "udp_l3mdev_accept",
934 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
935 .maxlen = sizeof(int),
936 .mode = 0644,
937 .proc_handler = proc_dointvec_minmax,
938 .extra1 = &zero,
939 .extra2 = &one,
940 },
941#endif
f9301034
ED		 942 {
943 .procname = "tcp_sack",
944 .data = &init_net.ipv4.sysctl_tcp_sack,
945 .maxlen = sizeof(int),
946 .mode = 0644,
947 .proc_handler = proc_dointvec
948 },
9bb37ef0
ED		 949 {
950 .procname = "tcp_window_scaling",
951 .data = &init_net.ipv4.sysctl_tcp_window_scaling,
952 .maxlen = sizeof(int),
953 .mode = 0644,
954 .proc_handler = proc_dointvec
955 },
5d2ed052
ED		 956 {
957 .procname = "tcp_timestamps",
958 .data = &init_net.ipv4.sysctl_tcp_timestamps,
959 .maxlen = sizeof(int),
960 .mode = 0644,
961 .proc_handler = proc_dointvec
962 },
2ae21cf5
ED		 963 {
964 .procname = "tcp_early_retrans",
965 .data = &init_net.ipv4.sysctl_tcp_early_retrans,
966 .maxlen = sizeof(int),
967 .mode = 0644,
968 .proc_handler = proc_dointvec_minmax,
969 .extra1 = &zero,
970 .extra2 = &four,
971 },
e20223f1
ED		 972 {
973 .procname = "tcp_recovery",
974 .data = &init_net.ipv4.sysctl_tcp_recovery,
975 .maxlen = sizeof(int),
976 .mode = 0644,
977 .proc_handler = proc_dointvec,
978 },
2c04ac8a
ED		 979 {
980 .procname = "tcp_thin_linear_timeouts",
981 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
982 .maxlen = sizeof(int),
983 .mode = 0644,
984 .proc_handler = proc_dointvec
985 },
b510f0d2
ED		 986 {
987 .procname = "tcp_slow_start_after_idle",
988 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
989 .maxlen = sizeof(int),
990 .mode = 0644,
991 .proc_handler = proc_dointvec
992 },
e0a1e5b5
ED		 993 {
994 .procname = "tcp_retrans_collapse",
995 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
996 .maxlen = sizeof(int),
997 .mode = 0644,
998 .proc_handler = proc_dointvec
999 },
3f4c7c6f
ED		 1000 {
1001 .procname = "tcp_stdurg",
1002 .data = &init_net.ipv4.sysctl_tcp_stdurg,
1003 .maxlen = sizeof(int),
1004 .mode = 0644,
1005 .proc_handler = proc_dointvec
1006 },
625357aa
ED		 1007 {
1008 .procname = "tcp_rfc1337",
1009 .data = &init_net.ipv4.sysctl_tcp_rfc1337,
1010 .maxlen = sizeof(int),
1011 .mode = 0644,
1012 .proc_handler = proc_dointvec
1013 },
65c9410c
ED		 1014 {
1015 .procname = "tcp_abort_on_overflow",
1016 .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
1017 .maxlen = sizeof(int),
1018 .mode = 0644,
1019 .proc_handler = proc_dointvec
1020 },
0bc65a28
ED		 1021 {
1022 .procname = "tcp_fack",
1023 .data = &init_net.ipv4.sysctl_tcp_fack,
1024 .maxlen = sizeof(int),
1025 .mode = 0644,
1026 .proc_handler = proc_dointvec
1027 },
c6e21803
ED		 1028 {
1029 .procname = "tcp_max_reordering",
1030 .data = &init_net.ipv4.sysctl_tcp_max_reordering,
1031 .maxlen = sizeof(int),
1032 .mode = 0644,
1033 .proc_handler = proc_dointvec
1034 },
6496f6bd
ED		 1035 {
1036 .procname = "tcp_dsack",
1037 .data = &init_net.ipv4.sysctl_tcp_dsack,
1038 .maxlen = sizeof(int),
1039 .mode = 0644,
1040 .proc_handler = proc_dointvec
1041 },
0c12654a
ED		 1042 {
1043 .procname = "tcp_app_win",
1044 .data = &init_net.ipv4.sysctl_tcp_app_win,
1045 .maxlen = sizeof(int),
1046 .mode = 0644,
1047 .proc_handler = proc_dointvec
1048 },
94f0893e
ED		 1049 {
1050 .procname = "tcp_adv_win_scale",
1051 .data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
1052 .maxlen = sizeof(int),
1053 .mode = 0644,
1054 .proc_handler = proc_dointvec_minmax,
1055 .extra1 = &tcp_adv_win_scale_min,
1056 .extra2 = &tcp_adv_win_scale_max,
1057 },
af9b69a7
ED		 1058 {
1059 .procname = "tcp_frto",
1060 .data = &init_net.ipv4.sysctl_tcp_frto,
1061 .maxlen = sizeof(int),
1062 .mode = 0644,
1063 .proc_handler = proc_dointvec
1064 },
ec36e416
ED		 1065 {
1066 .procname = "tcp_no_metrics_save",
1067 .data = &init_net.ipv4.sysctl_tcp_nometrics_save,
1068 .maxlen = sizeof(int),
1069 .mode = 0644,
1070 .proc_handler = proc_dointvec,
1071 },
4540c0cf
ED		 1072 {
1073 .procname = "tcp_moderate_rcvbuf",
1074 .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
1075 .maxlen = sizeof(int),
1076 .mode = 0644,
1077 .proc_handler = proc_dointvec,
1078 },
d06a9904
ED		 1079 {
1080 .procname = "tcp_tso_win_divisor",
1081 .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
1082 .maxlen = sizeof(int),
1083 .mode = 0644,
1084 .proc_handler = proc_dointvec,
1085 },
ceef9ab6
ED		 1086 {
1087 .procname = "tcp_workaround_signed_windows",
1088 .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
1089 .maxlen = sizeof(int),
1090 .mode = 0644,
1091 .proc_handler = proc_dointvec
1092 },
9184d8bb
ED		 1093 {
1094 .procname = "tcp_limit_output_bytes",
1095 .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
1096 .maxlen = sizeof(int),
1097 .mode = 0644,
1098 .proc_handler = proc_dointvec
1099 },
b530b681
ED		 1100 {
1101 .procname = "tcp_challenge_ack_limit",
1102 .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit,
1103 .maxlen = sizeof(int),
1104 .mode = 0644,
1105 .proc_handler = proc_dointvec
1106 },
26e9596e
ED		 1107 {
1108 .procname = "tcp_min_tso_segs",
1109 .data = &init_net.ipv4.sysctl_tcp_min_tso_segs,
1110 .maxlen = sizeof(int),
1111 .mode = 0644,
1112 .proc_handler = proc_dointvec_minmax,
1113 .extra1 = &one,
1114 .extra2 = &gso_max_segs,
1115 },
bd239704
ED		 1116 {
1117 .procname = "tcp_min_rtt_wlen",
1118 .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
1119 .maxlen = sizeof(int),
1120 .mode = 0644,
1121 .proc_handler = proc_dointvec
1122 },
790f00e1
ED		 1123 {
1124 .procname = "tcp_autocorking",
1125 .data = &init_net.ipv4.sysctl_tcp_autocorking,
1126 .maxlen = sizeof(int),
1127 .mode = 0644,
1128 .proc_handler = proc_dointvec_minmax,
1129 .extra1 = &zero,
1130 .extra2 = &one,
1131 },
4170ba6b
ED		 1132 {
1133 .procname = "tcp_invalid_ratelimit",
1134 .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit,
1135 .maxlen = sizeof(int),
1136 .mode = 0644,
1137 .proc_handler = proc_dointvec_ms_jiffies,
1138 },
23a7102a
ED		 1139 {
1140 .procname = "tcp_pacing_ss_ratio",
1141 .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,
1142 .maxlen = sizeof(int),
1143 .mode = 0644,
1144 .proc_handler = proc_dointvec_minmax,
1145 .extra1 = &zero,
1146 .extra2 = &thousand,
1147 },
68528f09
PE		 1148 { }
1149};
1150
1577519d
PE		 1151static __net_init int ipv4_sysctl_init_net(struct net *net)
1152{
68528f09
PE		 1153 struct ctl_table *table;
1154
1155 table = ipv4_net_table;
09ad9bc7 1156 if (!net_eq(net, &init_net)) {
0a6fa23d
EB		 1157 int i;
1158
68528f09 1159 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
51456b29 1160 if (!table)
68528f09
PE		 1161 goto err_alloc;
1162
0a6fa23d
EB		 1163 /* Update the variables to point into the current struct net */
1164 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
1165 table[i].data += (void *)net - (void *)&init_net;
68528f09
PE		 1166 }
1167
ec8f23ce 1168 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
51456b29 1169 if (!net->ipv4.ipv4_hdr)
68528f09
PE		 1170 goto err_reg;
1171
122ff243
WC		 1172 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1173 if (!net->ipv4.sysctl_local_reserved_ports)
1174 goto err_ports;
1175
1577519d 1176 return 0;
68528f09 1177
122ff243
WC		 1178err_ports:
1179 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
68528f09 1180err_reg:
09ad9bc7 1181 if (!net_eq(net, &init_net))
68528f09
PE		 1182 kfree(table);
1183err_alloc:
1184 return -ENOMEM;
1577519d
PE		 1185}
1186
1187static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1188{
68528f09
PE		 1189 struct ctl_table *table;
1190
122ff243 1191 kfree(net->ipv4.sysctl_local_reserved_ports);
68528f09
PE		 1192 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1193 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1194 kfree(table);
1577519d
PE		 1195}
1196
1197static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1198 .init = ipv4_sysctl_init_net,
1199 .exit = ipv4_sysctl_exit_net,
1200};
1201
3e37c3f9
PE		 1202static __init int sysctl_ipv4_init(void)
1203{
1204 struct ctl_table_header *hdr;
1205
ec8f23ce 1206 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
51456b29 1207 if (!hdr)
1577519d
PE		 1208 return -ENOMEM;
1209
1210 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
5dd3df10 1211 unregister_net_sysctl_table(hdr);
1577519d
PE		 1212 return -ENOMEM;
1213 }
1214
1215 return 0;
3e37c3f9
PE		 1216}
1217
1218__initcall(sysctl_ipv4_init);
Linux 6.x block layer and io_uring tree(s)