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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem. | |
4 | * | |
1da177e4 LT |
5 | * Begun April 1, 1996, Mike Shaver. |
6 | * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS] | |
7 | */ | |
8 | ||
9 | #include <linux/mm.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/sysctl.h> | |
20380731 | 12 | #include <linux/igmp.h> |
14c85021 | 13 | #include <linux/inetdevice.h> |
227b60f5 | 14 | #include <linux/seqlock.h> |
3e37c3f9 | 15 | #include <linux/init.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
c319b4d7 | 17 | #include <linux/nsproxy.h> |
3dc43e3e | 18 | #include <linux/swap.h> |
1da177e4 | 19 | #include <net/snmp.h> |
20380731 | 20 | #include <net/icmp.h> |
1da177e4 LT |
21 | #include <net/ip.h> |
22 | #include <net/route.h> | |
23 | #include <net/tcp.h> | |
95766fff | 24 | #include <net/udp.h> |
446fda4f | 25 | #include <net/cipso_ipv4.h> |
04128f23 | 26 | #include <net/inet_frag.h> |
c319b4d7 | 27 | #include <net/ping.h> |
dddb64bc | 28 | #include <net/protocol.h> |
3ae6ec08 | 29 | #include <net/netevent.h> |
1da177e4 | 30 | |
89cee8b1 | 31 | static int zero; |
cdda8891 | 32 | static int one = 1; |
6ba8a3b1 | 33 | static int four = 4; |
43e122b0 | 34 | static int thousand = 1000; |
95bd09eb | 35 | static int gso_max_segs = GSO_MAX_SEGS; |
e905a9ed | 36 | static int tcp_retr1_max = 255; |
1da177e4 LT |
37 | static int ip_local_port_range_min[] = { 1, 1 }; |
38 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
39 | static int tcp_adv_win_scale_min = -31; |
40 | static int tcp_adv_win_scale_max = 31; | |
4548b683 KJ |
41 | static int ip_privileged_port_min; |
42 | static int ip_privileged_port_max = 65535; | |
249fab77 ED |
43 | static int ip_ttl_min = 1; |
44 | static int ip_ttl_max = 255; | |
651e9271 MT |
45 | static int tcp_syn_retries_min = 1; |
46 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; | |
c319b4d7 VK |
47 | static int ip_ping_group_range_min[] = { 0, 0 }; |
48 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 49 | |
b6690b14 FW |
50 | /* obsolete */ |
51 | static int sysctl_tcp_low_latency __read_mostly; | |
52 | ||
227b60f5 | 53 | /* Update system visible IP port range */ |
0bbf87d8 | 54 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 55 | { |
ed2dfd90 ED |
56 | bool same_parity = !((range[0] ^ range[1]) & 1); |
57 | ||
4ee3bd4a | 58 | write_seqlock_bh(&net->ipv4.ip_local_ports.lock); |
ed2dfd90 ED |
59 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
60 | net->ipv4.ip_local_ports.warned = true; | |
61 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); | |
62 | } | |
c9d8f1a6 CW |
63 | net->ipv4.ip_local_ports.range[0] = range[0]; |
64 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
4ee3bd4a | 65 | write_sequnlock_bh(&net->ipv4.ip_local_ports.lock); |
227b60f5 SH |
66 | } |
67 | ||
68 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 69 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
70 | void __user *buffer, |
71 | size_t *lenp, loff_t *ppos) | |
72 | { | |
0bbf87d8 | 73 | struct net *net = |
c9d8f1a6 | 74 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 75 | int ret; |
3c689b73 | 76 | int range[2]; |
fe2c6338 | 77 | struct ctl_table tmp = { |
227b60f5 SH |
78 | .data = &range, |
79 | .maxlen = sizeof(range), | |
80 | .mode = table->mode, | |
81 | .extra1 = &ip_local_port_range_min, | |
82 | .extra2 = &ip_local_port_range_max, | |
83 | }; | |
84 | ||
0bbf87d8 EB |
85 | inet_get_local_port_range(net, &range[0], &range[1]); |
86 | ||
8d65af78 | 87 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
88 | |
89 | if (write && ret == 0) { | |
4548b683 KJ |
90 | /* Ensure that the upper limit is not smaller than the lower, |
91 | * and that the lower does not encroach upon the privileged | |
92 | * port limit. | |
93 | */ | |
94 | if ((range[1] < range[0]) || | |
95 | (range[0] < net->ipv4.sysctl_ip_prot_sock)) | |
227b60f5 SH |
96 | ret = -EINVAL; |
97 | else | |
0bbf87d8 | 98 | set_local_port_range(net, range); |
227b60f5 SH |
99 | } |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
4548b683 KJ |
104 | /* Validate changes from /proc interface. */ |
105 | static int ipv4_privileged_ports(struct ctl_table *table, int write, | |
106 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
107 | { | |
108 | struct net *net = container_of(table->data, struct net, | |
109 | ipv4.sysctl_ip_prot_sock); | |
110 | int ret; | |
111 | int pports; | |
112 | int range[2]; | |
113 | struct ctl_table tmp = { | |
114 | .data = &pports, | |
115 | .maxlen = sizeof(pports), | |
116 | .mode = table->mode, | |
117 | .extra1 = &ip_privileged_port_min, | |
118 | .extra2 = &ip_privileged_port_max, | |
119 | }; | |
120 | ||
121 | pports = net->ipv4.sysctl_ip_prot_sock; | |
122 | ||
123 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
124 | ||
125 | if (write && ret == 0) { | |
126 | inet_get_local_port_range(net, &range[0], &range[1]); | |
127 | /* Ensure that the local port range doesn't overlap with the | |
128 | * privileged port range. | |
129 | */ | |
130 | if (range[0] < pports) | |
131 | ret = -EINVAL; | |
132 | else | |
133 | net->ipv4.sysctl_ip_prot_sock = pports; | |
134 | } | |
135 | ||
136 | return ret; | |
137 | } | |
c319b4d7 | 138 | |
7064d16e | 139 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 140 | { |
7064d16e | 141 | kgid_t *data = table->data; |
0bbf87d8 | 142 | struct net *net = |
ba6b918a | 143 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 144 | unsigned int seq; |
c319b4d7 | 145 | do { |
396a30cc | 146 | seq = read_seqbegin(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
147 | |
148 | *low = data[0]; | |
149 | *high = data[1]; | |
396a30cc | 150 | } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq)); |
c319b4d7 VK |
151 | } |
152 | ||
153 | /* Update system visible IP port range */ | |
7064d16e | 154 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 155 | { |
7064d16e | 156 | kgid_t *data = table->data; |
0bbf87d8 | 157 | struct net *net = |
ba6b918a | 158 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
396a30cc | 159 | write_seqlock(&net->ipv4.ping_group_range.lock); |
7064d16e EB |
160 | data[0] = low; |
161 | data[1] = high; | |
396a30cc | 162 | write_sequnlock(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
163 | } |
164 | ||
165 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 166 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
167 | void __user *buffer, |
168 | size_t *lenp, loff_t *ppos) | |
169 | { | |
7064d16e | 170 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 171 | int ret; |
7064d16e EB |
172 | gid_t urange[2]; |
173 | kgid_t low, high; | |
fe2c6338 | 174 | struct ctl_table tmp = { |
7064d16e EB |
175 | .data = &urange, |
176 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
177 | .mode = table->mode, |
178 | .extra1 = &ip_ping_group_range_min, | |
179 | .extra2 = &ip_ping_group_range_max, | |
180 | }; | |
181 | ||
7064d16e EB |
182 | inet_get_ping_group_range_table(table, &low, &high); |
183 | urange[0] = from_kgid_munged(user_ns, low); | |
184 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
185 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
186 | ||
7064d16e EB |
187 | if (write && ret == 0) { |
188 | low = make_kgid(user_ns, urange[0]); | |
189 | high = make_kgid(user_ns, urange[1]); | |
190 | if (!gid_valid(low) || !gid_valid(high) || | |
191 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
192 | low = make_kgid(&init_user_ns, 1); | |
193 | high = make_kgid(&init_user_ns, 0); | |
194 | } | |
195 | set_ping_group_range(table, low, high); | |
196 | } | |
c319b4d7 VK |
197 | |
198 | return ret; | |
199 | } | |
200 | ||
fe2c6338 | 201 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
202 | void __user *buffer, size_t *lenp, loff_t *ppos) |
203 | { | |
6670e152 SH |
204 | struct net *net = container_of(ctl->data, struct net, |
205 | ipv4.tcp_congestion_control); | |
317a76f9 | 206 | char val[TCP_CA_NAME_MAX]; |
fe2c6338 | 207 | struct ctl_table tbl = { |
317a76f9 SH |
208 | .data = val, |
209 | .maxlen = TCP_CA_NAME_MAX, | |
210 | }; | |
211 | int ret; | |
212 | ||
6670e152 | 213 | tcp_get_default_congestion_control(net, val); |
317a76f9 | 214 | |
8d65af78 | 215 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 | 216 | if (write && ret == 0) |
6670e152 | 217 | ret = tcp_set_default_congestion_control(net, val); |
317a76f9 SH |
218 | return ret; |
219 | } | |
220 | ||
fe2c6338 | 221 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 222 | int write, |
3ff825b2 SH |
223 | void __user *buffer, size_t *lenp, |
224 | loff_t *ppos) | |
225 | { | |
fe2c6338 | 226 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
227 | int ret; |
228 | ||
229 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
230 | if (!tbl.data) | |
231 | return -ENOMEM; | |
232 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 233 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
234 | kfree(tbl.data); |
235 | return ret; | |
236 | } | |
237 | ||
fe2c6338 | 238 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 239 | int write, |
ce7bc3bf SH |
240 | void __user *buffer, size_t *lenp, |
241 | loff_t *ppos) | |
242 | { | |
fe2c6338 | 243 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
244 | int ret; |
245 | ||
246 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
247 | if (!tbl.data) | |
248 | return -ENOMEM; | |
249 | ||
250 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 251 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
252 | if (write && ret == 0) |
253 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
254 | kfree(tbl.data); | |
255 | return ret; | |
256 | } | |
257 | ||
43713848 | 258 | static int proc_tcp_fastopen_key(struct ctl_table *table, int write, |
fe2c6338 JP |
259 | void __user *buffer, size_t *lenp, |
260 | loff_t *ppos) | |
10467163 | 261 | { |
43713848 HY |
262 | struct net *net = container_of(table->data, struct net, |
263 | ipv4.sysctl_tcp_fastopen); | |
fe2c6338 | 264 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
265 | struct tcp_fastopen_context *ctxt; |
266 | int ret; | |
267 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
268 | ||
269 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
270 | if (!tbl.data) | |
271 | return -ENOMEM; | |
272 | ||
273 | rcu_read_lock(); | |
43713848 | 274 | ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx); |
10467163 JC |
275 | if (ctxt) |
276 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
277 | else |
278 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
279 | rcu_read_unlock(); |
280 | ||
281 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
282 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
283 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
284 | ||
285 | if (write && ret == 0) { | |
286 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
287 | user_key + 2, user_key + 3) != 4) { | |
288 | ret = -EINVAL; | |
289 | goto bad_key; | |
290 | } | |
1fba70e5 YC |
291 | tcp_fastopen_reset_cipher(net, NULL, user_key, |
292 | TCP_FASTOPEN_KEY_LENGTH); | |
10467163 JC |
293 | } |
294 | ||
295 | bad_key: | |
296 | pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", | |
297 | user_key[0], user_key[1], user_key[2], user_key[3], | |
298 | (char *)tbl.data, ret); | |
299 | kfree(tbl.data); | |
300 | return ret; | |
301 | } | |
302 | ||
dddb64bc SAK |
303 | static void proc_configure_early_demux(int enabled, int protocol) |
304 | { | |
305 | struct net_protocol *ipprot; | |
306 | #if IS_ENABLED(CONFIG_IPV6) | |
307 | struct inet6_protocol *ip6prot; | |
308 | #endif | |
309 | ||
58c4c6a3 DA |
310 | rcu_read_lock(); |
311 | ||
dddb64bc SAK |
312 | ipprot = rcu_dereference(inet_protos[protocol]); |
313 | if (ipprot) | |
314 | ipprot->early_demux = enabled ? ipprot->early_demux_handler : | |
315 | NULL; | |
316 | ||
317 | #if IS_ENABLED(CONFIG_IPV6) | |
318 | ip6prot = rcu_dereference(inet6_protos[protocol]); | |
319 | if (ip6prot) | |
320 | ip6prot->early_demux = enabled ? ip6prot->early_demux_handler : | |
321 | NULL; | |
322 | #endif | |
58c4c6a3 | 323 | rcu_read_unlock(); |
dddb64bc SAK |
324 | } |
325 | ||
326 | static int proc_tcp_early_demux(struct ctl_table *table, int write, | |
327 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
328 | { | |
329 | int ret = 0; | |
330 | ||
331 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
332 | ||
333 | if (write && !ret) { | |
334 | int enabled = init_net.ipv4.sysctl_tcp_early_demux; | |
335 | ||
336 | proc_configure_early_demux(enabled, IPPROTO_TCP); | |
337 | } | |
338 | ||
339 | return ret; | |
340 | } | |
341 | ||
342 | static int proc_udp_early_demux(struct ctl_table *table, int write, | |
343 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
344 | { | |
345 | int ret = 0; | |
346 | ||
347 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
348 | ||
349 | if (write && !ret) { | |
350 | int enabled = init_net.ipv4.sysctl_udp_early_demux; | |
351 | ||
352 | proc_configure_early_demux(enabled, IPPROTO_UDP); | |
353 | } | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
cf1ef3f0 WW |
358 | static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table, |
359 | int write, | |
360 | void __user *buffer, | |
361 | size_t *lenp, loff_t *ppos) | |
362 | { | |
3733be14 HY |
363 | struct net *net = container_of(table->data, struct net, |
364 | ipv4.sysctl_tcp_fastopen_blackhole_timeout); | |
cf1ef3f0 WW |
365 | int ret; |
366 | ||
367 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
368 | if (write && ret == 0) | |
3733be14 | 369 | atomic_set(&net->ipv4.tfo_active_disable_times, 0); |
734942cc DW |
370 | |
371 | return ret; | |
372 | } | |
373 | ||
374 | static int proc_tcp_available_ulp(struct ctl_table *ctl, | |
375 | int write, | |
376 | void __user *buffer, size_t *lenp, | |
377 | loff_t *ppos) | |
378 | { | |
379 | struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, }; | |
380 | int ret; | |
381 | ||
382 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
383 | if (!tbl.data) | |
384 | return -ENOMEM; | |
385 | tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX); | |
386 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
387 | kfree(tbl.data); | |
388 | ||
cf1ef3f0 WW |
389 | return ret; |
390 | } | |
391 | ||
3ae6ec08 IS |
392 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
393 | static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write, | |
394 | void __user *buffer, size_t *lenp, | |
395 | loff_t *ppos) | |
396 | { | |
397 | struct net *net = container_of(table->data, struct net, | |
398 | ipv4.sysctl_fib_multipath_hash_policy); | |
399 | int ret; | |
400 | ||
401 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
402 | if (write && ret == 0) | |
3192dac6 | 403 | call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net); |
3ae6ec08 IS |
404 | |
405 | return ret; | |
406 | } | |
407 | #endif | |
408 | ||
3e37c3f9 | 409 | static struct ctl_table ipv4_table[] = { |
1da177e4 | 410 | { |
1da177e4 LT |
411 | .procname = "tcp_max_orphans", |
412 | .data = &sysctl_tcp_max_orphans, | |
413 | .maxlen = sizeof(int), | |
414 | .mode = 0644, | |
6d9f239a | 415 | .proc_handler = proc_dointvec |
1da177e4 | 416 | }, |
1da177e4 | 417 | { |
1da177e4 LT |
418 | .procname = "inet_peer_threshold", |
419 | .data = &inet_peer_threshold, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
6d9f239a | 422 | .proc_handler = proc_dointvec |
1da177e4 LT |
423 | }, |
424 | { | |
1da177e4 LT |
425 | .procname = "inet_peer_minttl", |
426 | .data = &inet_peer_minttl, | |
427 | .maxlen = sizeof(int), | |
428 | .mode = 0644, | |
6d9f239a | 429 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
430 | }, |
431 | { | |
1da177e4 LT |
432 | .procname = "inet_peer_maxttl", |
433 | .data = &inet_peer_maxttl, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
6d9f239a | 436 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 437 | }, |
a4fe34bf EB |
438 | { |
439 | .procname = "tcp_mem", | |
440 | .maxlen = sizeof(sysctl_tcp_mem), | |
441 | .data = &sysctl_tcp_mem, | |
442 | .mode = 0644, | |
443 | .proc_handler = proc_doulongvec_minmax, | |
444 | }, | |
1da177e4 | 445 | { |
1da177e4 LT |
446 | .procname = "tcp_low_latency", |
447 | .data = &sysctl_tcp_low_latency, | |
448 | .maxlen = sizeof(int), | |
449 | .mode = 0644, | |
6d9f239a | 450 | .proc_handler = proc_dointvec |
1da177e4 | 451 | }, |
446fda4f PM |
452 | #ifdef CONFIG_NETLABEL |
453 | { | |
446fda4f PM |
454 | .procname = "cipso_cache_enable", |
455 | .data = &cipso_v4_cache_enabled, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
6d9f239a | 458 | .proc_handler = proc_dointvec, |
446fda4f PM |
459 | }, |
460 | { | |
446fda4f PM |
461 | .procname = "cipso_cache_bucket_size", |
462 | .data = &cipso_v4_cache_bucketsize, | |
463 | .maxlen = sizeof(int), | |
464 | .mode = 0644, | |
6d9f239a | 465 | .proc_handler = proc_dointvec, |
446fda4f PM |
466 | }, |
467 | { | |
446fda4f PM |
468 | .procname = "cipso_rbm_optfmt", |
469 | .data = &cipso_v4_rbm_optfmt, | |
470 | .maxlen = sizeof(int), | |
471 | .mode = 0644, | |
6d9f239a | 472 | .proc_handler = proc_dointvec, |
446fda4f PM |
473 | }, |
474 | { | |
446fda4f PM |
475 | .procname = "cipso_rbm_strictvalid", |
476 | .data = &cipso_v4_rbm_strictvalid, | |
477 | .maxlen = sizeof(int), | |
478 | .mode = 0644, | |
6d9f239a | 479 | .proc_handler = proc_dointvec, |
446fda4f PM |
480 | }, |
481 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 482 | { |
3ff825b2 SH |
483 | .procname = "tcp_available_congestion_control", |
484 | .maxlen = TCP_CA_BUF_MAX, | |
485 | .mode = 0444, | |
6d9f239a | 486 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 487 | }, |
ce7bc3bf | 488 | { |
ce7bc3bf SH |
489 | .procname = "tcp_allowed_congestion_control", |
490 | .maxlen = TCP_CA_BUF_MAX, | |
491 | .mode = 0644, | |
6d9f239a | 492 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 493 | }, |
734942cc DW |
494 | { |
495 | .procname = "tcp_available_ulp", | |
496 | .maxlen = TCP_ULP_BUF_MAX, | |
497 | .mode = 0444, | |
498 | .proc_handler = proc_tcp_available_ulp, | |
499 | }, | |
4cdf507d ED |
500 | { |
501 | .procname = "icmp_msgs_per_sec", | |
502 | .data = &sysctl_icmp_msgs_per_sec, | |
503 | .maxlen = sizeof(int), | |
504 | .mode = 0644, | |
505 | .proc_handler = proc_dointvec_minmax, | |
506 | .extra1 = &zero, | |
507 | }, | |
508 | { | |
509 | .procname = "icmp_msgs_burst", | |
510 | .data = &sysctl_icmp_msgs_burst, | |
511 | .maxlen = sizeof(int), | |
512 | .mode = 0644, | |
513 | .proc_handler = proc_dointvec_minmax, | |
514 | .extra1 = &zero, | |
515 | }, | |
95766fff | 516 | { |
95766fff HA |
517 | .procname = "udp_mem", |
518 | .data = &sysctl_udp_mem, | |
519 | .maxlen = sizeof(sysctl_udp_mem), | |
520 | .mode = 0644, | |
8d987e5c | 521 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
522 | }, |
523 | { | |
95766fff HA |
524 | .procname = "udp_rmem_min", |
525 | .data = &sysctl_udp_rmem_min, | |
526 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
527 | .mode = 0644, | |
6d9f239a | 528 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 529 | .extra1 = &one |
95766fff HA |
530 | }, |
531 | { | |
95766fff HA |
532 | .procname = "udp_wmem_min", |
533 | .data = &sysctl_udp_wmem_min, | |
534 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
535 | .mode = 0644, | |
6d9f239a | 536 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 537 | .extra1 = &one |
95766fff | 538 | }, |
f8572d8f | 539 | { } |
1da177e4 | 540 | }; |
3e37c3f9 | 541 | |
68528f09 PE |
542 | static struct ctl_table ipv4_net_table[] = { |
543 | { | |
68528f09 PE |
544 | .procname = "icmp_echo_ignore_all", |
545 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
546 | .maxlen = sizeof(int), | |
547 | .mode = 0644, | |
6d9f239a | 548 | .proc_handler = proc_dointvec |
68528f09 PE |
549 | }, |
550 | { | |
68528f09 PE |
551 | .procname = "icmp_echo_ignore_broadcasts", |
552 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
553 | .maxlen = sizeof(int), | |
554 | .mode = 0644, | |
6d9f239a | 555 | .proc_handler = proc_dointvec |
68528f09 PE |
556 | }, |
557 | { | |
68528f09 PE |
558 | .procname = "icmp_ignore_bogus_error_responses", |
559 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
560 | .maxlen = sizeof(int), | |
561 | .mode = 0644, | |
6d9f239a | 562 | .proc_handler = proc_dointvec |
68528f09 PE |
563 | }, |
564 | { | |
68528f09 PE |
565 | .procname = "icmp_errors_use_inbound_ifaddr", |
566 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
567 | .maxlen = sizeof(int), | |
568 | .mode = 0644, | |
6d9f239a | 569 | .proc_handler = proc_dointvec |
68528f09 PE |
570 | }, |
571 | { | |
68528f09 PE |
572 | .procname = "icmp_ratelimit", |
573 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
574 | .maxlen = sizeof(int), | |
575 | .mode = 0644, | |
6d9f239a | 576 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
577 | }, |
578 | { | |
68528f09 PE |
579 | .procname = "icmp_ratemask", |
580 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
581 | .maxlen = sizeof(int), | |
582 | .mode = 0644, | |
6d9f239a | 583 | .proc_handler = proc_dointvec |
68528f09 | 584 | }, |
c319b4d7 VK |
585 | { |
586 | .procname = "ping_group_range", | |
ba6b918a | 587 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 588 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
589 | .mode = 0644, |
590 | .proc_handler = ipv4_ping_group_range, | |
591 | }, | |
5d134f1c HFS |
592 | { |
593 | .procname = "tcp_ecn", | |
594 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
595 | .maxlen = sizeof(int), | |
596 | .mode = 0644, | |
597 | .proc_handler = proc_dointvec | |
598 | }, | |
49213555 DB |
599 | { |
600 | .procname = "tcp_ecn_fallback", | |
601 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
602 | .maxlen = sizeof(int), | |
603 | .mode = 0644, | |
604 | .proc_handler = proc_dointvec | |
605 | }, | |
287b7f38 NB |
606 | { |
607 | .procname = "ip_dynaddr", | |
608 | .data = &init_net.ipv4.sysctl_ip_dynaddr, | |
609 | .maxlen = sizeof(int), | |
610 | .mode = 0644, | |
611 | .proc_handler = proc_dointvec | |
612 | }, | |
e21145a9 NB |
613 | { |
614 | .procname = "ip_early_demux", | |
615 | .data = &init_net.ipv4.sysctl_ip_early_demux, | |
616 | .maxlen = sizeof(int), | |
617 | .mode = 0644, | |
618 | .proc_handler = proc_dointvec | |
619 | }, | |
dddb64bc SAK |
620 | { |
621 | .procname = "udp_early_demux", | |
622 | .data = &init_net.ipv4.sysctl_udp_early_demux, | |
623 | .maxlen = sizeof(int), | |
624 | .mode = 0644, | |
625 | .proc_handler = proc_udp_early_demux | |
626 | }, | |
627 | { | |
628 | .procname = "tcp_early_demux", | |
629 | .data = &init_net.ipv4.sysctl_tcp_early_demux, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
632 | .proc_handler = proc_tcp_early_demux | |
633 | }, | |
fa50d974 NB |
634 | { |
635 | .procname = "ip_default_ttl", | |
636 | .data = &init_net.ipv4.sysctl_ip_default_ttl, | |
637 | .maxlen = sizeof(int), | |
638 | .mode = 0644, | |
639 | .proc_handler = proc_dointvec_minmax, | |
640 | .extra1 = &ip_ttl_min, | |
641 | .extra2 = &ip_ttl_max, | |
642 | }, | |
0bbf87d8 EB |
643 | { |
644 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
645 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
646 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
647 | .mode = 0644, |
648 | .proc_handler = ipv4_local_port_range, | |
649 | }, | |
122ff243 WC |
650 | { |
651 | .procname = "ip_local_reserved_ports", | |
652 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
653 | .maxlen = 65536, | |
654 | .mode = 0644, | |
655 | .proc_handler = proc_do_large_bitmap, | |
656 | }, | |
974eda11 HFS |
657 | { |
658 | .procname = "ip_no_pmtu_disc", | |
659 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
660 | .maxlen = sizeof(int), | |
661 | .mode = 0644, | |
662 | .proc_handler = proc_dointvec | |
663 | }, | |
f87c10a8 HFS |
664 | { |
665 | .procname = "ip_forward_use_pmtu", | |
666 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
667 | .maxlen = sizeof(int), | |
668 | .mode = 0644, | |
669 | .proc_handler = proc_dointvec, | |
670 | }, | |
49a60158 VB |
671 | { |
672 | .procname = "ip_nonlocal_bind", | |
673 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
674 | .maxlen = sizeof(int), | |
675 | .mode = 0644, | |
676 | .proc_handler = proc_dointvec | |
677 | }, | |
e110861f LC |
678 | { |
679 | .procname = "fwmark_reflect", | |
680 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
681 | .maxlen = sizeof(int), | |
682 | .mode = 0644, | |
683 | .proc_handler = proc_dointvec, | |
684 | }, | |
84f39b08 LC |
685 | { |
686 | .procname = "tcp_fwmark_accept", | |
687 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
688 | .maxlen = sizeof(int), | |
689 | .mode = 0644, | |
690 | .proc_handler = proc_dointvec, | |
691 | }, | |
6dd9a14e DA |
692 | #ifdef CONFIG_NET_L3_MASTER_DEV |
693 | { | |
694 | .procname = "tcp_l3mdev_accept", | |
695 | .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, | |
696 | .maxlen = sizeof(int), | |
697 | .mode = 0644, | |
698 | .proc_handler = proc_dointvec_minmax, | |
699 | .extra1 = &zero, | |
700 | .extra2 = &one, | |
701 | }, | |
702 | #endif | |
b0f9ca53 FD |
703 | { |
704 | .procname = "tcp_mtu_probing", | |
705 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
706 | .maxlen = sizeof(int), | |
707 | .mode = 0644, | |
708 | .proc_handler = proc_dointvec, | |
709 | }, | |
710 | { | |
711 | .procname = "tcp_base_mss", | |
712 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
713 | .maxlen = sizeof(int), | |
714 | .mode = 0644, | |
715 | .proc_handler = proc_dointvec, | |
716 | }, | |
6b58e0a5 FD |
717 | { |
718 | .procname = "tcp_probe_threshold", | |
719 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
720 | .maxlen = sizeof(int), | |
721 | .mode = 0644, | |
722 | .proc_handler = proc_dointvec, | |
723 | }, | |
05cbc0db FD |
724 | { |
725 | .procname = "tcp_probe_interval", | |
726 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
727 | .maxlen = sizeof(int), | |
728 | .mode = 0644, | |
729 | .proc_handler = proc_dointvec, | |
730 | }, | |
df2cf4a7 PD |
731 | { |
732 | .procname = "igmp_link_local_mcast_reports", | |
87a8a2ae | 733 | .data = &init_net.ipv4.sysctl_igmp_llm_reports, |
df2cf4a7 PD |
734 | .maxlen = sizeof(int), |
735 | .mode = 0644, | |
736 | .proc_handler = proc_dointvec | |
737 | }, | |
815c5270 NB |
738 | { |
739 | .procname = "igmp_max_memberships", | |
740 | .data = &init_net.ipv4.sysctl_igmp_max_memberships, | |
741 | .maxlen = sizeof(int), | |
742 | .mode = 0644, | |
743 | .proc_handler = proc_dointvec | |
744 | }, | |
166b6b2d NB |
745 | { |
746 | .procname = "igmp_max_msf", | |
747 | .data = &init_net.ipv4.sysctl_igmp_max_msf, | |
748 | .maxlen = sizeof(int), | |
749 | .mode = 0644, | |
750 | .proc_handler = proc_dointvec | |
751 | }, | |
165094af NB |
752 | #ifdef CONFIG_IP_MULTICAST |
753 | { | |
754 | .procname = "igmp_qrv", | |
755 | .data = &init_net.ipv4.sysctl_igmp_qrv, | |
756 | .maxlen = sizeof(int), | |
757 | .mode = 0644, | |
758 | .proc_handler = proc_dointvec_minmax, | |
759 | .extra1 = &one | |
760 | }, | |
761 | #endif | |
6670e152 SH |
762 | { |
763 | .procname = "tcp_congestion_control", | |
764 | .data = &init_net.ipv4.tcp_congestion_control, | |
765 | .mode = 0644, | |
766 | .maxlen = TCP_CA_NAME_MAX, | |
767 | .proc_handler = proc_tcp_congestion_control, | |
768 | }, | |
13b287e8 NB |
769 | { |
770 | .procname = "tcp_keepalive_time", | |
771 | .data = &init_net.ipv4.sysctl_tcp_keepalive_time, | |
772 | .maxlen = sizeof(int), | |
773 | .mode = 0644, | |
774 | .proc_handler = proc_dointvec_jiffies, | |
775 | }, | |
9bd6861b NB |
776 | { |
777 | .procname = "tcp_keepalive_probes", | |
778 | .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, | |
779 | .maxlen = sizeof(int), | |
780 | .mode = 0644, | |
781 | .proc_handler = proc_dointvec | |
782 | }, | |
b840d15d NB |
783 | { |
784 | .procname = "tcp_keepalive_intvl", | |
785 | .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, | |
786 | .maxlen = sizeof(int), | |
787 | .mode = 0644, | |
788 | .proc_handler = proc_dointvec_jiffies, | |
789 | }, | |
6fa25166 NB |
790 | { |
791 | .procname = "tcp_syn_retries", | |
792 | .data = &init_net.ipv4.sysctl_tcp_syn_retries, | |
793 | .maxlen = sizeof(int), | |
794 | .mode = 0644, | |
795 | .proc_handler = proc_dointvec_minmax, | |
796 | .extra1 = &tcp_syn_retries_min, | |
797 | .extra2 = &tcp_syn_retries_max | |
798 | }, | |
7c083ecb NB |
799 | { |
800 | .procname = "tcp_synack_retries", | |
801 | .data = &init_net.ipv4.sysctl_tcp_synack_retries, | |
802 | .maxlen = sizeof(int), | |
803 | .mode = 0644, | |
804 | .proc_handler = proc_dointvec | |
805 | }, | |
12ed8244 NB |
806 | #ifdef CONFIG_SYN_COOKIES |
807 | { | |
808 | .procname = "tcp_syncookies", | |
809 | .data = &init_net.ipv4.sysctl_tcp_syncookies, | |
810 | .maxlen = sizeof(int), | |
811 | .mode = 0644, | |
812 | .proc_handler = proc_dointvec | |
813 | }, | |
814 | #endif | |
1043e25f NB |
815 | { |
816 | .procname = "tcp_reordering", | |
817 | .data = &init_net.ipv4.sysctl_tcp_reordering, | |
818 | .maxlen = sizeof(int), | |
819 | .mode = 0644, | |
820 | .proc_handler = proc_dointvec | |
821 | }, | |
ae5c3f40 NB |
822 | { |
823 | .procname = "tcp_retries1", | |
824 | .data = &init_net.ipv4.sysctl_tcp_retries1, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
827 | .proc_handler = proc_dointvec_minmax, | |
828 | .extra2 = &tcp_retr1_max | |
829 | }, | |
c6214a97 NB |
830 | { |
831 | .procname = "tcp_retries2", | |
832 | .data = &init_net.ipv4.sysctl_tcp_retries2, | |
833 | .maxlen = sizeof(int), | |
834 | .mode = 0644, | |
835 | .proc_handler = proc_dointvec | |
836 | }, | |
c402d9be NB |
837 | { |
838 | .procname = "tcp_orphan_retries", | |
839 | .data = &init_net.ipv4.sysctl_tcp_orphan_retries, | |
840 | .maxlen = sizeof(int), | |
841 | .mode = 0644, | |
842 | .proc_handler = proc_dointvec | |
843 | }, | |
1e579caa NB |
844 | { |
845 | .procname = "tcp_fin_timeout", | |
846 | .data = &init_net.ipv4.sysctl_tcp_fin_timeout, | |
847 | .maxlen = sizeof(int), | |
848 | .mode = 0644, | |
849 | .proc_handler = proc_dointvec_jiffies, | |
850 | }, | |
4979f2d9 NB |
851 | { |
852 | .procname = "tcp_notsent_lowat", | |
853 | .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, | |
854 | .maxlen = sizeof(unsigned int), | |
855 | .mode = 0644, | |
b007f090 | 856 | .proc_handler = proc_douintvec, |
4979f2d9 | 857 | }, |
56ab6b93 HY |
858 | { |
859 | .procname = "tcp_tw_reuse", | |
860 | .data = &init_net.ipv4.sysctl_tcp_tw_reuse, | |
861 | .maxlen = sizeof(int), | |
862 | .mode = 0644, | |
863 | .proc_handler = proc_dointvec | |
864 | }, | |
1946e672 HY |
865 | { |
866 | .procname = "tcp_max_tw_buckets", | |
867 | .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, | |
868 | .maxlen = sizeof(int), | |
869 | .mode = 0644, | |
870 | .proc_handler = proc_dointvec | |
871 | }, | |
fee83d09 HY |
872 | { |
873 | .procname = "tcp_max_syn_backlog", | |
874 | .data = &init_net.ipv4.sysctl_max_syn_backlog, | |
875 | .maxlen = sizeof(int), | |
876 | .mode = 0644, | |
877 | .proc_handler = proc_dointvec | |
878 | }, | |
e1cfcbe8 HY |
879 | { |
880 | .procname = "tcp_fastopen", | |
881 | .data = &init_net.ipv4.sysctl_tcp_fastopen, | |
882 | .maxlen = sizeof(int), | |
883 | .mode = 0644, | |
884 | .proc_handler = proc_dointvec, | |
885 | }, | |
43713848 HY |
886 | { |
887 | .procname = "tcp_fastopen_key", | |
888 | .mode = 0600, | |
889 | .data = &init_net.ipv4.sysctl_tcp_fastopen, | |
890 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
891 | .proc_handler = proc_tcp_fastopen_key, | |
892 | }, | |
3733be14 HY |
893 | { |
894 | .procname = "tcp_fastopen_blackhole_timeout_sec", | |
895 | .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout, | |
896 | .maxlen = sizeof(int), | |
897 | .mode = 0644, | |
898 | .proc_handler = proc_tfo_blackhole_detect_timeout, | |
899 | .extra1 = &zero, | |
900 | }, | |
a6db4494 DA |
901 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
902 | { | |
903 | .procname = "fib_multipath_use_neigh", | |
904 | .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, | |
905 | .maxlen = sizeof(int), | |
906 | .mode = 0644, | |
907 | .proc_handler = proc_dointvec_minmax, | |
bf4e0a3d NA |
908 | .extra1 = &zero, |
909 | .extra2 = &one, | |
910 | }, | |
911 | { | |
912 | .procname = "fib_multipath_hash_policy", | |
913 | .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy, | |
914 | .maxlen = sizeof(int), | |
915 | .mode = 0644, | |
3ae6ec08 | 916 | .proc_handler = proc_fib_multipath_hash_policy, |
a6db4494 DA |
917 | .extra1 = &zero, |
918 | .extra2 = &one, | |
919 | }, | |
920 | #endif | |
4548b683 KJ |
921 | { |
922 | .procname = "ip_unprivileged_port_start", | |
923 | .maxlen = sizeof(int), | |
924 | .data = &init_net.ipv4.sysctl_ip_prot_sock, | |
925 | .mode = 0644, | |
926 | .proc_handler = ipv4_privileged_ports, | |
927 | }, | |
63a6fff3 RS |
928 | #ifdef CONFIG_NET_L3_MASTER_DEV |
929 | { | |
930 | .procname = "udp_l3mdev_accept", | |
931 | .data = &init_net.ipv4.sysctl_udp_l3mdev_accept, | |
932 | .maxlen = sizeof(int), | |
933 | .mode = 0644, | |
934 | .proc_handler = proc_dointvec_minmax, | |
935 | .extra1 = &zero, | |
936 | .extra2 = &one, | |
937 | }, | |
938 | #endif | |
f9301034 ED |
939 | { |
940 | .procname = "tcp_sack", | |
941 | .data = &init_net.ipv4.sysctl_tcp_sack, | |
942 | .maxlen = sizeof(int), | |
943 | .mode = 0644, | |
944 | .proc_handler = proc_dointvec | |
945 | }, | |
9bb37ef0 ED |
946 | { |
947 | .procname = "tcp_window_scaling", | |
948 | .data = &init_net.ipv4.sysctl_tcp_window_scaling, | |
949 | .maxlen = sizeof(int), | |
950 | .mode = 0644, | |
951 | .proc_handler = proc_dointvec | |
952 | }, | |
5d2ed052 ED |
953 | { |
954 | .procname = "tcp_timestamps", | |
955 | .data = &init_net.ipv4.sysctl_tcp_timestamps, | |
956 | .maxlen = sizeof(int), | |
957 | .mode = 0644, | |
958 | .proc_handler = proc_dointvec | |
959 | }, | |
2ae21cf5 ED |
960 | { |
961 | .procname = "tcp_early_retrans", | |
962 | .data = &init_net.ipv4.sysctl_tcp_early_retrans, | |
963 | .maxlen = sizeof(int), | |
964 | .mode = 0644, | |
965 | .proc_handler = proc_dointvec_minmax, | |
966 | .extra1 = &zero, | |
967 | .extra2 = &four, | |
968 | }, | |
e20223f1 ED |
969 | { |
970 | .procname = "tcp_recovery", | |
971 | .data = &init_net.ipv4.sysctl_tcp_recovery, | |
972 | .maxlen = sizeof(int), | |
973 | .mode = 0644, | |
974 | .proc_handler = proc_dointvec, | |
975 | }, | |
2c04ac8a ED |
976 | { |
977 | .procname = "tcp_thin_linear_timeouts", | |
978 | .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts, | |
979 | .maxlen = sizeof(int), | |
980 | .mode = 0644, | |
981 | .proc_handler = proc_dointvec | |
982 | }, | |
b510f0d2 ED |
983 | { |
984 | .procname = "tcp_slow_start_after_idle", | |
985 | .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle, | |
986 | .maxlen = sizeof(int), | |
987 | .mode = 0644, | |
988 | .proc_handler = proc_dointvec | |
989 | }, | |
e0a1e5b5 ED |
990 | { |
991 | .procname = "tcp_retrans_collapse", | |
992 | .data = &init_net.ipv4.sysctl_tcp_retrans_collapse, | |
993 | .maxlen = sizeof(int), | |
994 | .mode = 0644, | |
995 | .proc_handler = proc_dointvec | |
996 | }, | |
3f4c7c6f ED |
997 | { |
998 | .procname = "tcp_stdurg", | |
999 | .data = &init_net.ipv4.sysctl_tcp_stdurg, | |
1000 | .maxlen = sizeof(int), | |
1001 | .mode = 0644, | |
1002 | .proc_handler = proc_dointvec | |
1003 | }, | |
625357aa ED |
1004 | { |
1005 | .procname = "tcp_rfc1337", | |
1006 | .data = &init_net.ipv4.sysctl_tcp_rfc1337, | |
1007 | .maxlen = sizeof(int), | |
1008 | .mode = 0644, | |
1009 | .proc_handler = proc_dointvec | |
1010 | }, | |
65c9410c ED |
1011 | { |
1012 | .procname = "tcp_abort_on_overflow", | |
1013 | .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow, | |
1014 | .maxlen = sizeof(int), | |
1015 | .mode = 0644, | |
1016 | .proc_handler = proc_dointvec | |
1017 | }, | |
0bc65a28 ED |
1018 | { |
1019 | .procname = "tcp_fack", | |
1020 | .data = &init_net.ipv4.sysctl_tcp_fack, | |
1021 | .maxlen = sizeof(int), | |
1022 | .mode = 0644, | |
1023 | .proc_handler = proc_dointvec | |
1024 | }, | |
c6e21803 ED |
1025 | { |
1026 | .procname = "tcp_max_reordering", | |
1027 | .data = &init_net.ipv4.sysctl_tcp_max_reordering, | |
1028 | .maxlen = sizeof(int), | |
1029 | .mode = 0644, | |
1030 | .proc_handler = proc_dointvec | |
1031 | }, | |
6496f6bd ED |
1032 | { |
1033 | .procname = "tcp_dsack", | |
1034 | .data = &init_net.ipv4.sysctl_tcp_dsack, | |
1035 | .maxlen = sizeof(int), | |
1036 | .mode = 0644, | |
1037 | .proc_handler = proc_dointvec | |
1038 | }, | |
0c12654a ED |
1039 | { |
1040 | .procname = "tcp_app_win", | |
1041 | .data = &init_net.ipv4.sysctl_tcp_app_win, | |
1042 | .maxlen = sizeof(int), | |
1043 | .mode = 0644, | |
1044 | .proc_handler = proc_dointvec | |
1045 | }, | |
94f0893e ED |
1046 | { |
1047 | .procname = "tcp_adv_win_scale", | |
1048 | .data = &init_net.ipv4.sysctl_tcp_adv_win_scale, | |
1049 | .maxlen = sizeof(int), | |
1050 | .mode = 0644, | |
1051 | .proc_handler = proc_dointvec_minmax, | |
1052 | .extra1 = &tcp_adv_win_scale_min, | |
1053 | .extra2 = &tcp_adv_win_scale_max, | |
1054 | }, | |
af9b69a7 ED |
1055 | { |
1056 | .procname = "tcp_frto", | |
1057 | .data = &init_net.ipv4.sysctl_tcp_frto, | |
1058 | .maxlen = sizeof(int), | |
1059 | .mode = 0644, | |
1060 | .proc_handler = proc_dointvec | |
1061 | }, | |
ec36e416 ED |
1062 | { |
1063 | .procname = "tcp_no_metrics_save", | |
1064 | .data = &init_net.ipv4.sysctl_tcp_nometrics_save, | |
1065 | .maxlen = sizeof(int), | |
1066 | .mode = 0644, | |
1067 | .proc_handler = proc_dointvec, | |
1068 | }, | |
4540c0cf ED |
1069 | { |
1070 | .procname = "tcp_moderate_rcvbuf", | |
1071 | .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf, | |
1072 | .maxlen = sizeof(int), | |
1073 | .mode = 0644, | |
1074 | .proc_handler = proc_dointvec, | |
1075 | }, | |
d06a9904 ED |
1076 | { |
1077 | .procname = "tcp_tso_win_divisor", | |
1078 | .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor, | |
1079 | .maxlen = sizeof(int), | |
1080 | .mode = 0644, | |
1081 | .proc_handler = proc_dointvec, | |
1082 | }, | |
ceef9ab6 ED |
1083 | { |
1084 | .procname = "tcp_workaround_signed_windows", | |
1085 | .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows, | |
1086 | .maxlen = sizeof(int), | |
1087 | .mode = 0644, | |
1088 | .proc_handler = proc_dointvec | |
1089 | }, | |
9184d8bb ED |
1090 | { |
1091 | .procname = "tcp_limit_output_bytes", | |
1092 | .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes, | |
1093 | .maxlen = sizeof(int), | |
1094 | .mode = 0644, | |
1095 | .proc_handler = proc_dointvec | |
1096 | }, | |
b530b681 ED |
1097 | { |
1098 | .procname = "tcp_challenge_ack_limit", | |
1099 | .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit, | |
1100 | .maxlen = sizeof(int), | |
1101 | .mode = 0644, | |
1102 | .proc_handler = proc_dointvec | |
1103 | }, | |
26e9596e ED |
1104 | { |
1105 | .procname = "tcp_min_tso_segs", | |
1106 | .data = &init_net.ipv4.sysctl_tcp_min_tso_segs, | |
1107 | .maxlen = sizeof(int), | |
1108 | .mode = 0644, | |
1109 | .proc_handler = proc_dointvec_minmax, | |
1110 | .extra1 = &one, | |
1111 | .extra2 = &gso_max_segs, | |
1112 | }, | |
bd239704 ED |
1113 | { |
1114 | .procname = "tcp_min_rtt_wlen", | |
1115 | .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen, | |
1116 | .maxlen = sizeof(int), | |
1117 | .mode = 0644, | |
1118 | .proc_handler = proc_dointvec | |
1119 | }, | |
790f00e1 ED |
1120 | { |
1121 | .procname = "tcp_autocorking", | |
1122 | .data = &init_net.ipv4.sysctl_tcp_autocorking, | |
1123 | .maxlen = sizeof(int), | |
1124 | .mode = 0644, | |
1125 | .proc_handler = proc_dointvec_minmax, | |
1126 | .extra1 = &zero, | |
1127 | .extra2 = &one, | |
1128 | }, | |
4170ba6b ED |
1129 | { |
1130 | .procname = "tcp_invalid_ratelimit", | |
1131 | .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit, | |
1132 | .maxlen = sizeof(int), | |
1133 | .mode = 0644, | |
1134 | .proc_handler = proc_dointvec_ms_jiffies, | |
1135 | }, | |
23a7102a ED |
1136 | { |
1137 | .procname = "tcp_pacing_ss_ratio", | |
1138 | .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio, | |
1139 | .maxlen = sizeof(int), | |
1140 | .mode = 0644, | |
1141 | .proc_handler = proc_dointvec_minmax, | |
1142 | .extra1 = &zero, | |
1143 | .extra2 = &thousand, | |
1144 | }, | |
c26e91f8 ED |
1145 | { |
1146 | .procname = "tcp_pacing_ca_ratio", | |
1147 | .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio, | |
1148 | .maxlen = sizeof(int), | |
1149 | .mode = 0644, | |
1150 | .proc_handler = proc_dointvec_minmax, | |
1151 | .extra1 = &zero, | |
1152 | .extra2 = &thousand, | |
1153 | }, | |
356d1833 ED |
1154 | { |
1155 | .procname = "tcp_wmem", | |
1156 | .data = &init_net.ipv4.sysctl_tcp_wmem, | |
1157 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem), | |
1158 | .mode = 0644, | |
1159 | .proc_handler = proc_dointvec_minmax, | |
1160 | .extra1 = &one, | |
1161 | }, | |
1162 | { | |
1163 | .procname = "tcp_rmem", | |
1164 | .data = &init_net.ipv4.sysctl_tcp_rmem, | |
1165 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem), | |
1166 | .mode = 0644, | |
1167 | .proc_handler = proc_dointvec_minmax, | |
1168 | .extra1 = &one, | |
1169 | }, | |
68528f09 PE |
1170 | { } |
1171 | }; | |
1172 | ||
1577519d PE |
1173 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
1174 | { | |
68528f09 PE |
1175 | struct ctl_table *table; |
1176 | ||
1177 | table = ipv4_net_table; | |
09ad9bc7 | 1178 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
1179 | int i; |
1180 | ||
68528f09 | 1181 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
51456b29 | 1182 | if (!table) |
68528f09 PE |
1183 | goto err_alloc; |
1184 | ||
0a6fa23d EB |
1185 | /* Update the variables to point into the current struct net */ |
1186 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
1187 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
1188 | } |
1189 | ||
ec8f23ce | 1190 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
51456b29 | 1191 | if (!net->ipv4.ipv4_hdr) |
68528f09 PE |
1192 | goto err_reg; |
1193 | ||
122ff243 WC |
1194 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
1195 | if (!net->ipv4.sysctl_local_reserved_ports) | |
1196 | goto err_ports; | |
1197 | ||
1577519d | 1198 | return 0; |
68528f09 | 1199 | |
122ff243 WC |
1200 | err_ports: |
1201 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 1202 | err_reg: |
09ad9bc7 | 1203 | if (!net_eq(net, &init_net)) |
68528f09 PE |
1204 | kfree(table); |
1205 | err_alloc: | |
1206 | return -ENOMEM; | |
1577519d PE |
1207 | } |
1208 | ||
1209 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
1210 | { | |
68528f09 PE |
1211 | struct ctl_table *table; |
1212 | ||
122ff243 | 1213 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
1214 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
1215 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
1216 | kfree(table); | |
1577519d PE |
1217 | } |
1218 | ||
1219 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
1220 | .init = ipv4_sysctl_init_net, | |
1221 | .exit = ipv4_sysctl_exit_net, | |
22769a2a | 1222 | .async = true, |
1577519d PE |
1223 | }; |
1224 | ||
3e37c3f9 PE |
1225 | static __init int sysctl_ipv4_init(void) |
1226 | { | |
1227 | struct ctl_table_header *hdr; | |
1228 | ||
ec8f23ce | 1229 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
51456b29 | 1230 | if (!hdr) |
1577519d PE |
1231 | return -ENOMEM; |
1232 | ||
1233 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 1234 | unregister_net_sysctl_table(hdr); |
1577519d PE |
1235 | return -ENOMEM; |
1236 | } | |
1237 | ||
1238 | return 0; | |
3e37c3f9 PE |
1239 | } |
1240 | ||
1241 | __initcall(sysctl_ipv4_init); |