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tcp: Namespace-ify sysctl_tcp_rfc1337
[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 = "tcp_abort_on_overflow",
398 .data = &sysctl_tcp_abort_on_overflow,
399 .maxlen = sizeof(int),
400 .mode = 0644,
6d9f239a 401 .proc_handler = proc_dointvec
1da177e4 402 },
1da177e4 403 {
1da177e4
LT		 404 .procname = "inet_peer_threshold",
405 .data = &inet_peer_threshold,
406 .maxlen = sizeof(int),
407 .mode = 0644,
6d9f239a 408 .proc_handler = proc_dointvec
1da177e4
LT		 409 },
410 {
1da177e4
LT		 411 .procname = "inet_peer_minttl",
412 .data = &inet_peer_minttl,
413 .maxlen = sizeof(int),
414 .mode = 0644,
6d9f239a 415 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 416 },
417 {
1da177e4
LT		 418 .procname = "inet_peer_maxttl",
419 .data = &inet_peer_maxttl,
420 .maxlen = sizeof(int),
421 .mode = 0644,
6d9f239a 422 .proc_handler = proc_dointvec_jiffies,
1da177e4 423 },
1da177e4 424 {
1da177e4
LT		 425 .procname = "tcp_fack",
426 .data = &sysctl_tcp_fack,
427 .maxlen = sizeof(int),
428 .mode = 0644,
6d9f239a 429 .proc_handler = proc_dointvec
1da177e4 430 },
dca145ff
ED		 431 {
432 .procname = "tcp_max_reordering",
433 .data = &sysctl_tcp_max_reordering,
434 .maxlen = sizeof(int),
435 .mode = 0644,
436 .proc_handler = proc_dointvec
437 },
1da177e4 438 {
1da177e4
LT		 439 .procname = "tcp_dsack",
440 .data = &sysctl_tcp_dsack,
441 .maxlen = sizeof(int),
442 .mode = 0644,
6d9f239a 443 .proc_handler = proc_dointvec
1da177e4 444 },
a4fe34bf
EB		 445 {
446 .procname = "tcp_mem",
447 .maxlen = sizeof(sysctl_tcp_mem),
448 .data = &sysctl_tcp_mem,
449 .mode = 0644,
450 .proc_handler = proc_doulongvec_minmax,
451 },
1da177e4 452 {
1da177e4
LT		 453 .procname = "tcp_wmem",
454 .data = &sysctl_tcp_wmem,
455 .maxlen = sizeof(sysctl_tcp_wmem),
456 .mode = 0644,
cdda8891 457 .proc_handler = proc_dointvec_minmax,
5d37852b 458 .extra1 = &one,
1da177e4
LT		 459 },
460 {
1da177e4
LT		 461 .procname = "tcp_rmem",
462 .data = &sysctl_tcp_rmem,
463 .maxlen = sizeof(sysctl_tcp_rmem),
464 .mode = 0644,
cdda8891 465 .proc_handler = proc_dointvec_minmax,
5d37852b 466 .extra1 = &one,
1da177e4
LT		 467 },
468 {
1da177e4
LT		 469 .procname = "tcp_app_win",
470 .data = &sysctl_tcp_app_win,
471 .maxlen = sizeof(int),
472 .mode = 0644,
6d9f239a 473 .proc_handler = proc_dointvec
1da177e4
LT		 474 },
475 {
1da177e4
LT		 476 .procname = "tcp_adv_win_scale",
477 .data = &sysctl_tcp_adv_win_scale,
478 .maxlen = sizeof(int),
479 .mode = 0644,
0147fc05
AD		 480 .proc_handler = proc_dointvec_minmax,
481 .extra1 = &tcp_adv_win_scale_min,
482 .extra2 = &tcp_adv_win_scale_max,
1da177e4 483 },
1da177e4 484 {
1da177e4
LT		 485 .procname = "tcp_frto",
486 .data = &sysctl_tcp_frto,
487 .maxlen = sizeof(int),
f6722583
YC		 488 .mode = 0644,
489 .proc_handler = proc_dointvec
490 },
491 {
492 .procname = "tcp_min_rtt_wlen",
493 .data = &sysctl_tcp_min_rtt_wlen,
494 .maxlen = sizeof(int),
1da177e4 495 .mode = 0644,
6d9f239a 496 .proc_handler = proc_dointvec
1da177e4
LT		 497 },
498 {
1da177e4
LT		 499 .procname = "tcp_low_latency",
500 .data = &sysctl_tcp_low_latency,
501 .maxlen = sizeof(int),
502 .mode = 0644,
6d9f239a 503 .proc_handler = proc_dointvec
1da177e4 504 },
1da177e4 505 {
1da177e4
LT		 506 .procname = "tcp_no_metrics_save",
507 .data = &sysctl_tcp_nometrics_save,
508 .maxlen = sizeof(int),
509 .mode = 0644,
6d9f239a 510 .proc_handler = proc_dointvec,
1da177e4 511 },
1da177e4 512 {
1da177e4
LT		 513 .procname = "tcp_moderate_rcvbuf",
514 .data = &sysctl_tcp_moderate_rcvbuf,
515 .maxlen = sizeof(int),
516 .mode = 0644,
6d9f239a 517 .proc_handler = proc_dointvec,
1da177e4
LT		 518 },
519 {
1da177e4
LT		 520 .procname = "tcp_tso_win_divisor",
521 .data = &sysctl_tcp_tso_win_divisor,
522 .maxlen = sizeof(int),
523 .mode = 0644,
6d9f239a 524 .proc_handler = proc_dointvec,
1da177e4
LT		 525 },
526 {
317a76f9 527 .procname = "tcp_congestion_control",
1da177e4 528 .mode = 0644,
317a76f9 529 .maxlen = TCP_CA_NAME_MAX,
6d9f239a 530 .proc_handler = proc_tcp_congestion_control,
1da177e4 531 },
e905a9ed 532 {
15d99e02
RJ		 533 .procname = "tcp_workaround_signed_windows",
534 .data = &sysctl_tcp_workaround_signed_windows,
535 .maxlen = sizeof(int),
536 .mode = 0644,
6d9f239a 537 .proc_handler = proc_dointvec
15d99e02 538 },
46d3ceab
ED		 539 {
540 .procname = "tcp_limit_output_bytes",
541 .data = &sysctl_tcp_limit_output_bytes,
542 .maxlen = sizeof(int),
543 .mode = 0644,
544 .proc_handler = proc_dointvec
545 },
282f23c6
ED		 546 {
547 .procname = "tcp_challenge_ack_limit",
548 .data = &sysctl_tcp_challenge_ack_limit,
549 .maxlen = sizeof(int),
550 .mode = 0644,
551 .proc_handler = proc_dointvec
552 },
446fda4f
PM		 553#ifdef CONFIG_NETLABEL
554 {
446fda4f
PM		 555 .procname = "cipso_cache_enable",
556 .data = &cipso_v4_cache_enabled,
557 .maxlen = sizeof(int),
558 .mode = 0644,
6d9f239a 559 .proc_handler = proc_dointvec,
446fda4f
PM		 560 },
561 {
446fda4f
PM		 562 .procname = "cipso_cache_bucket_size",
563 .data = &cipso_v4_cache_bucketsize,
564 .maxlen = sizeof(int),
565 .mode = 0644,
6d9f239a 566 .proc_handler = proc_dointvec,
446fda4f
PM		 567 },
568 {
446fda4f
PM		 569 .procname = "cipso_rbm_optfmt",
570 .data = &cipso_v4_rbm_optfmt,
571 .maxlen = sizeof(int),
572 .mode = 0644,
6d9f239a 573 .proc_handler = proc_dointvec,
446fda4f
PM		 574 },
575 {
446fda4f
PM		 576 .procname = "cipso_rbm_strictvalid",
577 .data = &cipso_v4_rbm_strictvalid,
578 .maxlen = sizeof(int),
579 .mode = 0644,
6d9f239a 580 .proc_handler = proc_dointvec,
446fda4f
PM		 581 },
582#endif /* CONFIG_NETLABEL */
3ff825b2 583 {
3ff825b2
SH		 584 .procname = "tcp_available_congestion_control",
585 .maxlen = TCP_CA_BUF_MAX,
586 .mode = 0444,
6d9f239a 587 .proc_handler = proc_tcp_available_congestion_control,
3ff825b2 588 },
ce7bc3bf 589 {
ce7bc3bf
SH		 590 .procname = "tcp_allowed_congestion_control",
591 .maxlen = TCP_CA_BUF_MAX,
592 .mode = 0644,
6d9f239a 593 .proc_handler = proc_allowed_congestion_control,
ce7bc3bf 594 },
95bd09eb
ED		 595 {
596 .procname = "tcp_min_tso_segs",
597 .data = &sysctl_tcp_min_tso_segs,
598 .maxlen = sizeof(int),
599 .mode = 0644,
600 .proc_handler = proc_dointvec_minmax,
d6a4e26a 601 .extra1 = &one,
95bd09eb
ED		 602 .extra2 = &gso_max_segs,
603 },
43e122b0
ED		 604 {
605 .procname = "tcp_pacing_ss_ratio",
606 .data = &sysctl_tcp_pacing_ss_ratio,
607 .maxlen = sizeof(int),
608 .mode = 0644,
609 .proc_handler = proc_dointvec_minmax,
610 .extra1 = &zero,
611 .extra2 = &thousand,
612 },
613 {
614 .procname = "tcp_pacing_ca_ratio",
615 .data = &sysctl_tcp_pacing_ca_ratio,
616 .maxlen = sizeof(int),
617 .mode = 0644,
618 .proc_handler = proc_dointvec_minmax,
619 .extra1 = &zero,
620 .extra2 = &thousand,
621 },
f54b3111
ED		 622 {
623 .procname = "tcp_autocorking",
624 .data = &sysctl_tcp_autocorking,
625 .maxlen = sizeof(int),
626 .mode = 0644,
627 .proc_handler = proc_dointvec_minmax,
628 .extra1 = &zero,
629 .extra2 = &one,
630 },
032ee423
NC		 631 {
632 .procname = "tcp_invalid_ratelimit",
633 .data = &sysctl_tcp_invalid_ratelimit,
634 .maxlen = sizeof(int),
635 .mode = 0644,
636 .proc_handler = proc_dointvec_ms_jiffies,
637 },
734942cc
DW		 638 {
639 .procname = "tcp_available_ulp",
640 .maxlen = TCP_ULP_BUF_MAX,
641 .mode = 0444,
642 .proc_handler = proc_tcp_available_ulp,
643 },
4cdf507d
ED		 644 {
645 .procname = "icmp_msgs_per_sec",
646 .data = &sysctl_icmp_msgs_per_sec,
647 .maxlen = sizeof(int),
648 .mode = 0644,
649 .proc_handler = proc_dointvec_minmax,
650 .extra1 = &zero,
651 },
652 {
653 .procname = "icmp_msgs_burst",
654 .data = &sysctl_icmp_msgs_burst,
655 .maxlen = sizeof(int),
656 .mode = 0644,
657 .proc_handler = proc_dointvec_minmax,
658 .extra1 = &zero,
659 },
95766fff 660 {
95766fff
HA		 661 .procname = "udp_mem",
662 .data = &sysctl_udp_mem,
663 .maxlen = sizeof(sysctl_udp_mem),
664 .mode = 0644,
8d987e5c 665 .proc_handler = proc_doulongvec_minmax,
95766fff
HA		 666 },
667 {
95766fff
HA		 668 .procname = "udp_rmem_min",
669 .data = &sysctl_udp_rmem_min,
670 .maxlen = sizeof(sysctl_udp_rmem_min),
671 .mode = 0644,
6d9f239a 672 .proc_handler = proc_dointvec_minmax,
5d37852b 673 .extra1 = &one
95766fff
HA		 674 },
675 {
95766fff
HA		 676 .procname = "udp_wmem_min",
677 .data = &sysctl_udp_wmem_min,
678 .maxlen = sizeof(sysctl_udp_wmem_min),
679 .mode = 0644,
6d9f239a 680 .proc_handler = proc_dointvec_minmax,
5d37852b 681 .extra1 = &one
95766fff 682 },
f8572d8f 683 { }
1da177e4 684};
3e37c3f9 685
68528f09
PE		 686static struct ctl_table ipv4_net_table[] = {
687 {
68528f09
PE		 688 .procname = "icmp_echo_ignore_all",
689 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
690 .maxlen = sizeof(int),
691 .mode = 0644,
6d9f239a 692 .proc_handler = proc_dointvec
68528f09
PE		 693 },
694 {
68528f09
PE		 695 .procname = "icmp_echo_ignore_broadcasts",
696 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
697 .maxlen = sizeof(int),
698 .mode = 0644,
6d9f239a 699 .proc_handler = proc_dointvec
68528f09
PE		 700 },
701 {
68528f09
PE		 702 .procname = "icmp_ignore_bogus_error_responses",
703 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
704 .maxlen = sizeof(int),
705 .mode = 0644,
6d9f239a 706 .proc_handler = proc_dointvec
68528f09
PE		 707 },
708 {
68528f09
PE		 709 .procname = "icmp_errors_use_inbound_ifaddr",
710 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
711 .maxlen = sizeof(int),
712 .mode = 0644,
6d9f239a 713 .proc_handler = proc_dointvec
68528f09
PE		 714 },
715 {
68528f09
PE		 716 .procname = "icmp_ratelimit",
717 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
718 .maxlen = sizeof(int),
719 .mode = 0644,
6d9f239a 720 .proc_handler = proc_dointvec_ms_jiffies,
68528f09
PE		 721 },
722 {
68528f09
PE		 723 .procname = "icmp_ratemask",
724 .data = &init_net.ipv4.sysctl_icmp_ratemask,
725 .maxlen = sizeof(int),
726 .mode = 0644,
6d9f239a 727 .proc_handler = proc_dointvec
68528f09 728 },
c319b4d7
VK		 729 {
730 .procname = "ping_group_range",
ba6b918a 731 .data = &init_net.ipv4.ping_group_range.range,
7064d16e 732 .maxlen = sizeof(gid_t)*2,
c319b4d7
VK		 733 .mode = 0644,
734 .proc_handler = ipv4_ping_group_range,
735 },
5d134f1c
HFS		 736 {
737 .procname = "tcp_ecn",
738 .data = &init_net.ipv4.sysctl_tcp_ecn,
739 .maxlen = sizeof(int),
740 .mode = 0644,
741 .proc_handler = proc_dointvec
742 },
49213555
DB		 743 {
744 .procname = "tcp_ecn_fallback",
745 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
746 .maxlen = sizeof(int),
747 .mode = 0644,
748 .proc_handler = proc_dointvec
749 },
287b7f38
NB		 750 {
751 .procname = "ip_dynaddr",
752 .data = &init_net.ipv4.sysctl_ip_dynaddr,
753 .maxlen = sizeof(int),
754 .mode = 0644,
755 .proc_handler = proc_dointvec
756 },
e21145a9
NB		 757 {
758 .procname = "ip_early_demux",
759 .data = &init_net.ipv4.sysctl_ip_early_demux,
760 .maxlen = sizeof(int),
761 .mode = 0644,
762 .proc_handler = proc_dointvec
763 },
dddb64bc 764 {
765 .procname = "udp_early_demux",
766 .data = &init_net.ipv4.sysctl_udp_early_demux,
767 .maxlen = sizeof(int),
768 .mode = 0644,
769 .proc_handler = proc_udp_early_demux
770 },
771 {
772 .procname = "tcp_early_demux",
773 .data = &init_net.ipv4.sysctl_tcp_early_demux,
774 .maxlen = sizeof(int),
775 .mode = 0644,
776 .proc_handler = proc_tcp_early_demux
777 },
fa50d974
NB		 778 {
779 .procname = "ip_default_ttl",
780 .data = &init_net.ipv4.sysctl_ip_default_ttl,
781 .maxlen = sizeof(int),
782 .mode = 0644,
783 .proc_handler = proc_dointvec_minmax,
784 .extra1 = &ip_ttl_min,
785 .extra2 = &ip_ttl_max,
786 },
0bbf87d8
EB		 787 {
788 .procname = "ip_local_port_range",
c9d8f1a6
CW		 789 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
790 .data = &init_net.ipv4.ip_local_ports.range,
0bbf87d8
EB		 791 .mode = 0644,
792 .proc_handler = ipv4_local_port_range,
793 },
122ff243
WC		 794 {
795 .procname = "ip_local_reserved_ports",
796 .data = &init_net.ipv4.sysctl_local_reserved_ports,
797 .maxlen = 65536,
798 .mode = 0644,
799 .proc_handler = proc_do_large_bitmap,
800 },
974eda11
HFS		 801 {
802 .procname = "ip_no_pmtu_disc",
803 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
804 .maxlen = sizeof(int),
805 .mode = 0644,
806 .proc_handler = proc_dointvec
807 },
f87c10a8
HFS		 808 {
809 .procname = "ip_forward_use_pmtu",
810 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
811 .maxlen = sizeof(int),
812 .mode = 0644,
813 .proc_handler = proc_dointvec,
814 },
49a60158
VB		 815 {
816 .procname = "ip_nonlocal_bind",
817 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
818 .maxlen = sizeof(int),
819 .mode = 0644,
820 .proc_handler = proc_dointvec
821 },
e110861f
LC		 822 {
823 .procname = "fwmark_reflect",
824 .data = &init_net.ipv4.sysctl_fwmark_reflect,
825 .maxlen = sizeof(int),
826 .mode = 0644,
827 .proc_handler = proc_dointvec,
828 },
84f39b08
LC		 829 {
830 .procname = "tcp_fwmark_accept",
831 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
832 .maxlen = sizeof(int),
833 .mode = 0644,
834 .proc_handler = proc_dointvec,
835 },
6dd9a14e
DA		 836#ifdef CONFIG_NET_L3_MASTER_DEV
837 {
838 .procname = "tcp_l3mdev_accept",
839 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
840 .maxlen = sizeof(int),
841 .mode = 0644,
842 .proc_handler = proc_dointvec_minmax,
843 .extra1 = &zero,
844 .extra2 = &one,
845 },
846#endif
b0f9ca53
FD		 847 {
848 .procname = "tcp_mtu_probing",
849 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
850 .maxlen = sizeof(int),
851 .mode = 0644,
852 .proc_handler = proc_dointvec,
853 },
854 {
855 .procname = "tcp_base_mss",
856 .data = &init_net.ipv4.sysctl_tcp_base_mss,
857 .maxlen = sizeof(int),
858 .mode = 0644,
859 .proc_handler = proc_dointvec,
860 },
6b58e0a5
FD		 861 {
862 .procname = "tcp_probe_threshold",
863 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
864 .maxlen = sizeof(int),
865 .mode = 0644,
866 .proc_handler = proc_dointvec,
867 },
05cbc0db
FD		 868 {
869 .procname = "tcp_probe_interval",
870 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
871 .maxlen = sizeof(int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec,
874 },
df2cf4a7
PD		 875 {
876 .procname = "igmp_link_local_mcast_reports",
87a8a2ae 877 .data = &init_net.ipv4.sysctl_igmp_llm_reports,
df2cf4a7
PD		 878 .maxlen = sizeof(int),
879 .mode = 0644,
880 .proc_handler = proc_dointvec
881 },
815c5270
NB		 882 {
883 .procname = "igmp_max_memberships",
884 .data = &init_net.ipv4.sysctl_igmp_max_memberships,
885 .maxlen = sizeof(int),
886 .mode = 0644,
887 .proc_handler = proc_dointvec
888 },
166b6b2d
NB		 889 {
890 .procname = "igmp_max_msf",
891 .data = &init_net.ipv4.sysctl_igmp_max_msf,
892 .maxlen = sizeof(int),
893 .mode = 0644,
894 .proc_handler = proc_dointvec
895 },
165094af
NB		 896#ifdef CONFIG_IP_MULTICAST
897 {
898 .procname = "igmp_qrv",
899 .data = &init_net.ipv4.sysctl_igmp_qrv,
900 .maxlen = sizeof(int),
901 .mode = 0644,
902 .proc_handler = proc_dointvec_minmax,
903 .extra1 = &one
904 },
905#endif
13b287e8
NB		 906 {
907 .procname = "tcp_keepalive_time",
908 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
909 .maxlen = sizeof(int),
910 .mode = 0644,
911 .proc_handler = proc_dointvec_jiffies,
912 },
9bd6861b
NB		 913 {
914 .procname = "tcp_keepalive_probes",
915 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
916 .maxlen = sizeof(int),
917 .mode = 0644,
918 .proc_handler = proc_dointvec
919 },
b840d15d
NB		 920 {
921 .procname = "tcp_keepalive_intvl",
922 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
923 .maxlen = sizeof(int),
924 .mode = 0644,
925 .proc_handler = proc_dointvec_jiffies,
926 },
6fa25166
NB		 927 {
928 .procname = "tcp_syn_retries",
929 .data = &init_net.ipv4.sysctl_tcp_syn_retries,
930 .maxlen = sizeof(int),
931 .mode = 0644,
932 .proc_handler = proc_dointvec_minmax,
933 .extra1 = &tcp_syn_retries_min,
934 .extra2 = &tcp_syn_retries_max
935 },
7c083ecb
NB		 936 {
937 .procname = "tcp_synack_retries",
938 .data = &init_net.ipv4.sysctl_tcp_synack_retries,
939 .maxlen = sizeof(int),
940 .mode = 0644,
941 .proc_handler = proc_dointvec
942 },
12ed8244
NB		 943#ifdef CONFIG_SYN_COOKIES
944 {
945 .procname = "tcp_syncookies",
946 .data = &init_net.ipv4.sysctl_tcp_syncookies,
947 .maxlen = sizeof(int),
948 .mode = 0644,
949 .proc_handler = proc_dointvec
950 },
951#endif
1043e25f
NB		 952 {
953 .procname = "tcp_reordering",
954 .data = &init_net.ipv4.sysctl_tcp_reordering,
955 .maxlen = sizeof(int),
956 .mode = 0644,
957 .proc_handler = proc_dointvec
958 },
ae5c3f40
NB		 959 {
960 .procname = "tcp_retries1",
961 .data = &init_net.ipv4.sysctl_tcp_retries1,
962 .maxlen = sizeof(int),
963 .mode = 0644,
964 .proc_handler = proc_dointvec_minmax,
965 .extra2 = &tcp_retr1_max
966 },
c6214a97
NB		 967 {
968 .procname = "tcp_retries2",
969 .data = &init_net.ipv4.sysctl_tcp_retries2,
970 .maxlen = sizeof(int),
971 .mode = 0644,
972 .proc_handler = proc_dointvec
973 },
c402d9be
NB		 974 {
975 .procname = "tcp_orphan_retries",
976 .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
977 .maxlen = sizeof(int),
978 .mode = 0644,
979 .proc_handler = proc_dointvec
980 },
1e579caa
NB		 981 {
982 .procname = "tcp_fin_timeout",
983 .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
984 .maxlen = sizeof(int),
985 .mode = 0644,
986 .proc_handler = proc_dointvec_jiffies,
987 },
4979f2d9
NB		 988 {
989 .procname = "tcp_notsent_lowat",
990 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
991 .maxlen = sizeof(unsigned int),
992 .mode = 0644,
b007f090 993 .proc_handler = proc_douintvec,
4979f2d9 994 },
56ab6b93
HY		 995 {
996 .procname = "tcp_tw_reuse",
997 .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
998 .maxlen = sizeof(int),
999 .mode = 0644,
1000 .proc_handler = proc_dointvec
1001 },
1946e672
HY		 1002 {
1003 .procname = "tcp_max_tw_buckets",
1004 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
1005 .maxlen = sizeof(int),
1006 .mode = 0644,
1007 .proc_handler = proc_dointvec
1008 },
fee83d09
HY		 1009 {
1010 .procname = "tcp_max_syn_backlog",
1011 .data = &init_net.ipv4.sysctl_max_syn_backlog,
1012 .maxlen = sizeof(int),
1013 .mode = 0644,
1014 .proc_handler = proc_dointvec
1015 },
e1cfcbe8
HY		 1016 {
1017 .procname = "tcp_fastopen",
1018 .data = &init_net.ipv4.sysctl_tcp_fastopen,
1019 .maxlen = sizeof(int),
1020 .mode = 0644,
1021 .proc_handler = proc_dointvec,
1022 },
43713848
HY		 1023 {
1024 .procname = "tcp_fastopen_key",
1025 .mode = 0600,
1026 .data = &init_net.ipv4.sysctl_tcp_fastopen,
1027 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
1028 .proc_handler = proc_tcp_fastopen_key,
1029 },
3733be14
HY		 1030 {
1031 .procname = "tcp_fastopen_blackhole_timeout_sec",
1032 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
1033 .maxlen = sizeof(int),
1034 .mode = 0644,
1035 .proc_handler = proc_tfo_blackhole_detect_timeout,
1036 .extra1 = &zero,
1037 },
a6db4494
DA		 1038#ifdef CONFIG_IP_ROUTE_MULTIPATH
1039 {
1040 .procname = "fib_multipath_use_neigh",
1041 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
1042 .maxlen = sizeof(int),
1043 .mode = 0644,
1044 .proc_handler = proc_dointvec_minmax,
bf4e0a3d
NA		 1045 .extra1 = &zero,
1046 .extra2 = &one,
1047 },
1048 {
1049 .procname = "fib_multipath_hash_policy",
1050 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
1051 .maxlen = sizeof(int),
1052 .mode = 0644,
1053 .proc_handler = proc_dointvec_minmax,
a6db4494
DA		 1054 .extra1 = &zero,
1055 .extra2 = &one,
1056 },
1057#endif
4548b683
KJ		 1058 {
1059 .procname = "ip_unprivileged_port_start",
1060 .maxlen = sizeof(int),
1061 .data = &init_net.ipv4.sysctl_ip_prot_sock,
1062 .mode = 0644,
1063 .proc_handler = ipv4_privileged_ports,
1064 },
63a6fff3
RS		 1065#ifdef CONFIG_NET_L3_MASTER_DEV
1066 {
1067 .procname = "udp_l3mdev_accept",
1068 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
1069 .maxlen = sizeof(int),
1070 .mode = 0644,
1071 .proc_handler = proc_dointvec_minmax,
1072 .extra1 = &zero,
1073 .extra2 = &one,
1074 },
1075#endif
f9301034
ED		 1076 {
1077 .procname = "tcp_sack",
1078 .data = &init_net.ipv4.sysctl_tcp_sack,
1079 .maxlen = sizeof(int),
1080 .mode = 0644,
1081 .proc_handler = proc_dointvec
1082 },
9bb37ef0
ED		 1083 {
1084 .procname = "tcp_window_scaling",
1085 .data = &init_net.ipv4.sysctl_tcp_window_scaling,
1086 .maxlen = sizeof(int),
1087 .mode = 0644,
1088 .proc_handler = proc_dointvec
1089 },
5d2ed052
ED		 1090 {
1091 .procname = "tcp_timestamps",
1092 .data = &init_net.ipv4.sysctl_tcp_timestamps,
1093 .maxlen = sizeof(int),
1094 .mode = 0644,
1095 .proc_handler = proc_dointvec
1096 },
2ae21cf5
ED		 1097 {
1098 .procname = "tcp_early_retrans",
1099 .data = &init_net.ipv4.sysctl_tcp_early_retrans,
1100 .maxlen = sizeof(int),
1101 .mode = 0644,
1102 .proc_handler = proc_dointvec_minmax,
1103 .extra1 = &zero,
1104 .extra2 = &four,
1105 },
e20223f1
ED		 1106 {
1107 .procname = "tcp_recovery",
1108 .data = &init_net.ipv4.sysctl_tcp_recovery,
1109 .maxlen = sizeof(int),
1110 .mode = 0644,
1111 .proc_handler = proc_dointvec,
1112 },
2c04ac8a
ED		 1113 {
1114 .procname = "tcp_thin_linear_timeouts",
1115 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
1116 .maxlen = sizeof(int),
1117 .mode = 0644,
1118 .proc_handler = proc_dointvec
1119 },
b510f0d2
ED		 1120 {
1121 .procname = "tcp_slow_start_after_idle",
1122 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
1123 .maxlen = sizeof(int),
1124 .mode = 0644,
1125 .proc_handler = proc_dointvec
1126 },
e0a1e5b5
ED		 1127 {
1128 .procname = "tcp_retrans_collapse",
1129 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
1130 .maxlen = sizeof(int),
1131 .mode = 0644,
1132 .proc_handler = proc_dointvec
1133 },
3f4c7c6f
ED		 1134 {
1135 .procname = "tcp_stdurg",
1136 .data = &init_net.ipv4.sysctl_tcp_stdurg,
1137 .maxlen = sizeof(int),
1138 .mode = 0644,
1139 .proc_handler = proc_dointvec
1140 },
625357aa
ED		 1141 {
1142 .procname = "tcp_rfc1337",
1143 .data = &init_net.ipv4.sysctl_tcp_rfc1337,
1144 .maxlen = sizeof(int),
1145 .mode = 0644,
1146 .proc_handler = proc_dointvec
1147 },
68528f09
PE		 1148 { }
1149};
1150
1577519d
PE		 1151static __net_init int ipv4_sysctl_init_net(struct net *net)
1152{
68528f09
PE		 1153 struct ctl_table *table;
1154
1155 table = ipv4_net_table;
09ad9bc7 1156 if (!net_eq(net, &init_net)) {
0a6fa23d
EB		 1157 int i;
1158
68528f09 1159 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
51456b29 1160 if (!table)
68528f09
PE		 1161 goto err_alloc;
1162
0a6fa23d
EB		 1163 /* Update the variables to point into the current struct net */
1164 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
1165 table[i].data += (void *)net - (void *)&init_net;
68528f09
PE		 1166 }
1167
ec8f23ce 1168 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
51456b29 1169 if (!net->ipv4.ipv4_hdr)
68528f09
PE		 1170 goto err_reg;
1171
122ff243
WC		 1172 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1173 if (!net->ipv4.sysctl_local_reserved_ports)
1174 goto err_ports;
1175
1577519d 1176 return 0;
68528f09 1177
122ff243
WC		 1178err_ports:
1179 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
68528f09 1180err_reg:
09ad9bc7 1181 if (!net_eq(net, &init_net))
68528f09
PE		 1182 kfree(table);
1183err_alloc:
1184 return -ENOMEM;
1577519d
PE		 1185}
1186
1187static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1188{
68528f09
PE		 1189 struct ctl_table *table;
1190
122ff243 1191 kfree(net->ipv4.sysctl_local_reserved_ports);
68528f09
PE		 1192 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1193 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1194 kfree(table);
1577519d
PE		 1195}
1196
1197static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1198 .init = ipv4_sysctl_init_net,
1199 .exit = ipv4_sysctl_exit_net,
1200};
1201
3e37c3f9
PE		 1202static __init int sysctl_ipv4_init(void)
1203{
1204 struct ctl_table_header *hdr;
1205
ec8f23ce 1206 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
51456b29 1207 if (!hdr)
1577519d
PE		 1208 return -ENOMEM;
1209
1210 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
5dd3df10 1211 unregister_net_sysctl_table(hdr);
1577519d
PE		 1212 return -ENOMEM;
1213 }
1214
1215 return 0;
3e37c3f9
PE		 1216}
1217
1218__initcall(sysctl_ipv4_init);
Linux 6.x block layer and io_uring tree(s)