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Commit | Line | Data |
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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> |
1da177e4 | 29 | |
89cee8b1 | 30 | static int zero; |
cdda8891 | 31 | static int one = 1; |
6ba8a3b1 | 32 | static int four = 4; |
43e122b0 | 33 | static int thousand = 1000; |
95bd09eb | 34 | static int gso_max_segs = GSO_MAX_SEGS; |
e905a9ed | 35 | static int tcp_retr1_max = 255; |
1da177e4 LT |
36 | static int ip_local_port_range_min[] = { 1, 1 }; |
37 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
38 | static int tcp_adv_win_scale_min = -31; |
39 | static int tcp_adv_win_scale_max = 31; | |
4548b683 KJ |
40 | static int ip_privileged_port_min; |
41 | static int ip_privileged_port_max = 65535; | |
249fab77 ED |
42 | static int ip_ttl_min = 1; |
43 | static int ip_ttl_max = 255; | |
651e9271 MT |
44 | static int tcp_syn_retries_min = 1; |
45 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; | |
c319b4d7 VK |
46 | static int ip_ping_group_range_min[] = { 0, 0 }; |
47 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 48 | |
b6690b14 FW |
49 | /* obsolete */ |
50 | static int sysctl_tcp_low_latency __read_mostly; | |
51 | ||
227b60f5 | 52 | /* Update system visible IP port range */ |
0bbf87d8 | 53 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 54 | { |
ed2dfd90 ED |
55 | bool same_parity = !((range[0] ^ range[1]) & 1); |
56 | ||
4ee3bd4a | 57 | write_seqlock_bh(&net->ipv4.ip_local_ports.lock); |
ed2dfd90 ED |
58 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
59 | net->ipv4.ip_local_ports.warned = true; | |
60 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); | |
61 | } | |
c9d8f1a6 CW |
62 | net->ipv4.ip_local_ports.range[0] = range[0]; |
63 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
4ee3bd4a | 64 | write_sequnlock_bh(&net->ipv4.ip_local_ports.lock); |
227b60f5 SH |
65 | } |
66 | ||
67 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 68 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
69 | void __user *buffer, |
70 | size_t *lenp, loff_t *ppos) | |
71 | { | |
0bbf87d8 | 72 | struct net *net = |
c9d8f1a6 | 73 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 74 | int ret; |
3c689b73 | 75 | int range[2]; |
fe2c6338 | 76 | struct ctl_table tmp = { |
227b60f5 SH |
77 | .data = &range, |
78 | .maxlen = sizeof(range), | |
79 | .mode = table->mode, | |
80 | .extra1 = &ip_local_port_range_min, | |
81 | .extra2 = &ip_local_port_range_max, | |
82 | }; | |
83 | ||
0bbf87d8 EB |
84 | inet_get_local_port_range(net, &range[0], &range[1]); |
85 | ||
8d65af78 | 86 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
87 | |
88 | if (write && ret == 0) { | |
4548b683 KJ |
89 | /* Ensure that the upper limit is not smaller than the lower, |
90 | * and that the lower does not encroach upon the privileged | |
91 | * port limit. | |
92 | */ | |
93 | if ((range[1] < range[0]) || | |
94 | (range[0] < net->ipv4.sysctl_ip_prot_sock)) | |
227b60f5 SH |
95 | ret = -EINVAL; |
96 | else | |
0bbf87d8 | 97 | set_local_port_range(net, range); |
227b60f5 SH |
98 | } |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
4548b683 KJ |
103 | /* Validate changes from /proc interface. */ |
104 | static int ipv4_privileged_ports(struct ctl_table *table, int write, | |
105 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
106 | { | |
107 | struct net *net = container_of(table->data, struct net, | |
108 | ipv4.sysctl_ip_prot_sock); | |
109 | int ret; | |
110 | int pports; | |
111 | int range[2]; | |
112 | struct ctl_table tmp = { | |
113 | .data = &pports, | |
114 | .maxlen = sizeof(pports), | |
115 | .mode = table->mode, | |
116 | .extra1 = &ip_privileged_port_min, | |
117 | .extra2 = &ip_privileged_port_max, | |
118 | }; | |
119 | ||
120 | pports = net->ipv4.sysctl_ip_prot_sock; | |
121 | ||
122 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
123 | ||
124 | if (write && ret == 0) { | |
125 | inet_get_local_port_range(net, &range[0], &range[1]); | |
126 | /* Ensure that the local port range doesn't overlap with the | |
127 | * privileged port range. | |
128 | */ | |
129 | if (range[0] < pports) | |
130 | ret = -EINVAL; | |
131 | else | |
132 | net->ipv4.sysctl_ip_prot_sock = pports; | |
133 | } | |
134 | ||
135 | return ret; | |
136 | } | |
c319b4d7 | 137 | |
7064d16e | 138 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 139 | { |
7064d16e | 140 | kgid_t *data = table->data; |
0bbf87d8 | 141 | struct net *net = |
ba6b918a | 142 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 143 | unsigned int seq; |
c319b4d7 | 144 | do { |
396a30cc | 145 | seq = read_seqbegin(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
146 | |
147 | *low = data[0]; | |
148 | *high = data[1]; | |
396a30cc | 149 | } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq)); |
c319b4d7 VK |
150 | } |
151 | ||
152 | /* Update system visible IP port range */ | |
7064d16e | 153 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 154 | { |
7064d16e | 155 | kgid_t *data = table->data; |
0bbf87d8 | 156 | struct net *net = |
ba6b918a | 157 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
396a30cc | 158 | write_seqlock(&net->ipv4.ping_group_range.lock); |
7064d16e EB |
159 | data[0] = low; |
160 | data[1] = high; | |
396a30cc | 161 | write_sequnlock(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
162 | } |
163 | ||
164 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 165 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
166 | void __user *buffer, |
167 | size_t *lenp, loff_t *ppos) | |
168 | { | |
7064d16e | 169 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 170 | int ret; |
7064d16e EB |
171 | gid_t urange[2]; |
172 | kgid_t low, high; | |
fe2c6338 | 173 | struct ctl_table tmp = { |
7064d16e EB |
174 | .data = &urange, |
175 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
176 | .mode = table->mode, |
177 | .extra1 = &ip_ping_group_range_min, | |
178 | .extra2 = &ip_ping_group_range_max, | |
179 | }; | |
180 | ||
7064d16e EB |
181 | inet_get_ping_group_range_table(table, &low, &high); |
182 | urange[0] = from_kgid_munged(user_ns, low); | |
183 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
184 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
185 | ||
7064d16e EB |
186 | if (write && ret == 0) { |
187 | low = make_kgid(user_ns, urange[0]); | |
188 | high = make_kgid(user_ns, urange[1]); | |
189 | if (!gid_valid(low) || !gid_valid(high) || | |
190 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
191 | low = make_kgid(&init_user_ns, 1); | |
192 | high = make_kgid(&init_user_ns, 0); | |
193 | } | |
194 | set_ping_group_range(table, low, high); | |
195 | } | |
c319b4d7 VK |
196 | |
197 | return ret; | |
198 | } | |
199 | ||
fe2c6338 | 200 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
201 | void __user *buffer, size_t *lenp, loff_t *ppos) |
202 | { | |
203 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 204 | struct ctl_table tbl = { |
317a76f9 SH |
205 | .data = val, |
206 | .maxlen = TCP_CA_NAME_MAX, | |
207 | }; | |
208 | int ret; | |
209 | ||
210 | tcp_get_default_congestion_control(val); | |
211 | ||
8d65af78 | 212 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
213 | if (write && ret == 0) |
214 | ret = tcp_set_default_congestion_control(val); | |
215 | return ret; | |
216 | } | |
217 | ||
fe2c6338 | 218 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 219 | int write, |
3ff825b2 SH |
220 | void __user *buffer, size_t *lenp, |
221 | loff_t *ppos) | |
222 | { | |
fe2c6338 | 223 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
224 | int ret; |
225 | ||
226 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
227 | if (!tbl.data) | |
228 | return -ENOMEM; | |
229 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 230 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
231 | kfree(tbl.data); |
232 | return ret; | |
233 | } | |
234 | ||
fe2c6338 | 235 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 236 | int write, |
ce7bc3bf SH |
237 | void __user *buffer, size_t *lenp, |
238 | loff_t *ppos) | |
239 | { | |
fe2c6338 | 240 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
241 | int ret; |
242 | ||
243 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
244 | if (!tbl.data) | |
245 | return -ENOMEM; | |
246 | ||
247 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 248 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
249 | if (write && ret == 0) |
250 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
251 | kfree(tbl.data); | |
252 | return ret; | |
253 | } | |
254 | ||
fe2c6338 JP |
255 | static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write, |
256 | void __user *buffer, size_t *lenp, | |
257 | loff_t *ppos) | |
10467163 | 258 | { |
fe2c6338 | 259 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
260 | struct tcp_fastopen_context *ctxt; |
261 | int ret; | |
262 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
263 | ||
264 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
265 | if (!tbl.data) | |
266 | return -ENOMEM; | |
267 | ||
268 | rcu_read_lock(); | |
269 | ctxt = rcu_dereference(tcp_fastopen_ctx); | |
270 | if (ctxt) | |
271 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
272 | else |
273 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
274 | rcu_read_unlock(); |
275 | ||
276 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
277 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
278 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
279 | ||
280 | if (write && ret == 0) { | |
281 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
282 | user_key + 2, user_key + 3) != 4) { | |
283 | ret = -EINVAL; | |
284 | goto bad_key; | |
285 | } | |
222e83d2 HFS |
286 | /* Generate a dummy secret but don't publish it. This |
287 | * is needed so we don't regenerate a new key on the | |
288 | * first invocation of tcp_fastopen_cookie_gen | |
289 | */ | |
290 | tcp_fastopen_init_key_once(false); | |
10467163 JC |
291 | tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH); |
292 | } | |
293 | ||
294 | bad_key: | |
295 | pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", | |
296 | user_key[0], user_key[1], user_key[2], user_key[3], | |
297 | (char *)tbl.data, ret); | |
298 | kfree(tbl.data); | |
299 | return ret; | |
300 | } | |
301 | ||
dddb64bc SAK |
302 | static void proc_configure_early_demux(int enabled, int protocol) |
303 | { | |
304 | struct net_protocol *ipprot; | |
305 | #if IS_ENABLED(CONFIG_IPV6) | |
306 | struct inet6_protocol *ip6prot; | |
307 | #endif | |
308 | ||
58c4c6a3 DA |
309 | rcu_read_lock(); |
310 | ||
dddb64bc SAK |
311 | ipprot = rcu_dereference(inet_protos[protocol]); |
312 | if (ipprot) | |
313 | ipprot->early_demux = enabled ? ipprot->early_demux_handler : | |
314 | NULL; | |
315 | ||
316 | #if IS_ENABLED(CONFIG_IPV6) | |
317 | ip6prot = rcu_dereference(inet6_protos[protocol]); | |
318 | if (ip6prot) | |
319 | ip6prot->early_demux = enabled ? ip6prot->early_demux_handler : | |
320 | NULL; | |
321 | #endif | |
58c4c6a3 | 322 | rcu_read_unlock(); |
dddb64bc SAK |
323 | } |
324 | ||
325 | static int proc_tcp_early_demux(struct ctl_table *table, int write, | |
326 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
327 | { | |
328 | int ret = 0; | |
329 | ||
330 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
331 | ||
332 | if (write && !ret) { | |
333 | int enabled = init_net.ipv4.sysctl_tcp_early_demux; | |
334 | ||
335 | proc_configure_early_demux(enabled, IPPROTO_TCP); | |
336 | } | |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
341 | static int proc_udp_early_demux(struct ctl_table *table, int write, | |
342 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
343 | { | |
344 | int ret = 0; | |
345 | ||
346 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
347 | ||
348 | if (write && !ret) { | |
349 | int enabled = init_net.ipv4.sysctl_udp_early_demux; | |
350 | ||
351 | proc_configure_early_demux(enabled, IPPROTO_UDP); | |
352 | } | |
353 | ||
354 | return ret; | |
355 | } | |
356 | ||
cf1ef3f0 WW |
357 | static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table, |
358 | int write, | |
359 | void __user *buffer, | |
360 | size_t *lenp, loff_t *ppos) | |
361 | { | |
362 | int ret; | |
363 | ||
364 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
365 | if (write && ret == 0) | |
366 | tcp_fastopen_active_timeout_reset(); | |
734942cc DW |
367 | |
368 | return ret; | |
369 | } | |
370 | ||
371 | static int proc_tcp_available_ulp(struct ctl_table *ctl, | |
372 | int write, | |
373 | void __user *buffer, size_t *lenp, | |
374 | loff_t *ppos) | |
375 | { | |
376 | struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, }; | |
377 | int ret; | |
378 | ||
379 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
380 | if (!tbl.data) | |
381 | return -ENOMEM; | |
382 | tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX); | |
383 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
384 | kfree(tbl.data); | |
385 | ||
cf1ef3f0 WW |
386 | return ret; |
387 | } | |
388 | ||
3e37c3f9 | 389 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 390 | { |
1da177e4 LT |
391 | .procname = "tcp_retrans_collapse", |
392 | .data = &sysctl_tcp_retrans_collapse, | |
393 | .maxlen = sizeof(int), | |
394 | .mode = 0644, | |
6d9f239a | 395 | .proc_handler = proc_dointvec |
1da177e4 | 396 | }, |
1da177e4 | 397 | { |
1da177e4 LT |
398 | .procname = "tcp_max_orphans", |
399 | .data = &sysctl_tcp_max_orphans, | |
400 | .maxlen = sizeof(int), | |
401 | .mode = 0644, | |
6d9f239a | 402 | .proc_handler = proc_dointvec |
1da177e4 | 403 | }, |
2100c8d2 YC |
404 | { |
405 | .procname = "tcp_fastopen", | |
406 | .data = &sysctl_tcp_fastopen, | |
407 | .maxlen = sizeof(int), | |
408 | .mode = 0644, | |
409 | .proc_handler = proc_dointvec, | |
410 | }, | |
10467163 JC |
411 | { |
412 | .procname = "tcp_fastopen_key", | |
413 | .mode = 0600, | |
414 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
415 | .proc_handler = proc_tcp_fastopen_key, | |
416 | }, | |
cf1ef3f0 WW |
417 | { |
418 | .procname = "tcp_fastopen_blackhole_timeout_sec", | |
419 | .data = &sysctl_tcp_fastopen_blackhole_timeout, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
422 | .proc_handler = proc_tfo_blackhole_detect_timeout, | |
423 | .extra1 = &zero, | |
424 | }, | |
1da177e4 | 425 | { |
1da177e4 LT |
426 | .procname = "tcp_abort_on_overflow", |
427 | .data = &sysctl_tcp_abort_on_overflow, | |
428 | .maxlen = sizeof(int), | |
429 | .mode = 0644, | |
6d9f239a | 430 | .proc_handler = proc_dointvec |
1da177e4 LT |
431 | }, |
432 | { | |
1da177e4 LT |
433 | .procname = "tcp_stdurg", |
434 | .data = &sysctl_tcp_stdurg, | |
435 | .maxlen = sizeof(int), | |
436 | .mode = 0644, | |
6d9f239a | 437 | .proc_handler = proc_dointvec |
1da177e4 LT |
438 | }, |
439 | { | |
1da177e4 LT |
440 | .procname = "tcp_rfc1337", |
441 | .data = &sysctl_tcp_rfc1337, | |
442 | .maxlen = sizeof(int), | |
443 | .mode = 0644, | |
6d9f239a | 444 | .proc_handler = proc_dointvec |
1da177e4 | 445 | }, |
1da177e4 | 446 | { |
1da177e4 LT |
447 | .procname = "inet_peer_threshold", |
448 | .data = &inet_peer_threshold, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
6d9f239a | 451 | .proc_handler = proc_dointvec |
1da177e4 LT |
452 | }, |
453 | { | |
1da177e4 LT |
454 | .procname = "inet_peer_minttl", |
455 | .data = &inet_peer_minttl, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
6d9f239a | 458 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
459 | }, |
460 | { | |
1da177e4 LT |
461 | .procname = "inet_peer_maxttl", |
462 | .data = &inet_peer_maxttl, | |
463 | .maxlen = sizeof(int), | |
464 | .mode = 0644, | |
6d9f239a | 465 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 466 | }, |
1da177e4 | 467 | { |
1da177e4 LT |
468 | .procname = "tcp_fack", |
469 | .data = &sysctl_tcp_fack, | |
470 | .maxlen = sizeof(int), | |
471 | .mode = 0644, | |
6d9f239a | 472 | .proc_handler = proc_dointvec |
1da177e4 | 473 | }, |
4f41b1c5 YC |
474 | { |
475 | .procname = "tcp_recovery", | |
476 | .data = &sysctl_tcp_recovery, | |
477 | .maxlen = sizeof(int), | |
478 | .mode = 0644, | |
479 | .proc_handler = proc_dointvec, | |
480 | }, | |
dca145ff ED |
481 | { |
482 | .procname = "tcp_max_reordering", | |
483 | .data = &sysctl_tcp_max_reordering, | |
484 | .maxlen = sizeof(int), | |
485 | .mode = 0644, | |
486 | .proc_handler = proc_dointvec | |
487 | }, | |
1da177e4 | 488 | { |
1da177e4 LT |
489 | .procname = "tcp_dsack", |
490 | .data = &sysctl_tcp_dsack, | |
491 | .maxlen = sizeof(int), | |
492 | .mode = 0644, | |
6d9f239a | 493 | .proc_handler = proc_dointvec |
1da177e4 | 494 | }, |
a4fe34bf EB |
495 | { |
496 | .procname = "tcp_mem", | |
497 | .maxlen = sizeof(sysctl_tcp_mem), | |
498 | .data = &sysctl_tcp_mem, | |
499 | .mode = 0644, | |
500 | .proc_handler = proc_doulongvec_minmax, | |
501 | }, | |
1da177e4 | 502 | { |
1da177e4 LT |
503 | .procname = "tcp_wmem", |
504 | .data = &sysctl_tcp_wmem, | |
505 | .maxlen = sizeof(sysctl_tcp_wmem), | |
506 | .mode = 0644, | |
cdda8891 | 507 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 508 | .extra1 = &one, |
1da177e4 LT |
509 | }, |
510 | { | |
1da177e4 LT |
511 | .procname = "tcp_rmem", |
512 | .data = &sysctl_tcp_rmem, | |
513 | .maxlen = sizeof(sysctl_tcp_rmem), | |
514 | .mode = 0644, | |
cdda8891 | 515 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 516 | .extra1 = &one, |
1da177e4 LT |
517 | }, |
518 | { | |
1da177e4 LT |
519 | .procname = "tcp_app_win", |
520 | .data = &sysctl_tcp_app_win, | |
521 | .maxlen = sizeof(int), | |
522 | .mode = 0644, | |
6d9f239a | 523 | .proc_handler = proc_dointvec |
1da177e4 LT |
524 | }, |
525 | { | |
1da177e4 LT |
526 | .procname = "tcp_adv_win_scale", |
527 | .data = &sysctl_tcp_adv_win_scale, | |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
0147fc05 AD |
530 | .proc_handler = proc_dointvec_minmax, |
531 | .extra1 = &tcp_adv_win_scale_min, | |
532 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 533 | }, |
1da177e4 | 534 | { |
1da177e4 LT |
535 | .procname = "tcp_frto", |
536 | .data = &sysctl_tcp_frto, | |
537 | .maxlen = sizeof(int), | |
f6722583 YC |
538 | .mode = 0644, |
539 | .proc_handler = proc_dointvec | |
540 | }, | |
541 | { | |
542 | .procname = "tcp_min_rtt_wlen", | |
543 | .data = &sysctl_tcp_min_rtt_wlen, | |
544 | .maxlen = sizeof(int), | |
1da177e4 | 545 | .mode = 0644, |
6d9f239a | 546 | .proc_handler = proc_dointvec |
1da177e4 LT |
547 | }, |
548 | { | |
1da177e4 LT |
549 | .procname = "tcp_low_latency", |
550 | .data = &sysctl_tcp_low_latency, | |
551 | .maxlen = sizeof(int), | |
552 | .mode = 0644, | |
6d9f239a | 553 | .proc_handler = proc_dointvec |
1da177e4 | 554 | }, |
1da177e4 | 555 | { |
1da177e4 LT |
556 | .procname = "tcp_no_metrics_save", |
557 | .data = &sysctl_tcp_nometrics_save, | |
558 | .maxlen = sizeof(int), | |
559 | .mode = 0644, | |
6d9f239a | 560 | .proc_handler = proc_dointvec, |
1da177e4 | 561 | }, |
1da177e4 | 562 | { |
1da177e4 LT |
563 | .procname = "tcp_moderate_rcvbuf", |
564 | .data = &sysctl_tcp_moderate_rcvbuf, | |
565 | .maxlen = sizeof(int), | |
566 | .mode = 0644, | |
6d9f239a | 567 | .proc_handler = proc_dointvec, |
1da177e4 LT |
568 | }, |
569 | { | |
1da177e4 LT |
570 | .procname = "tcp_tso_win_divisor", |
571 | .data = &sysctl_tcp_tso_win_divisor, | |
572 | .maxlen = sizeof(int), | |
573 | .mode = 0644, | |
6d9f239a | 574 | .proc_handler = proc_dointvec, |
1da177e4 LT |
575 | }, |
576 | { | |
317a76f9 | 577 | .procname = "tcp_congestion_control", |
1da177e4 | 578 | .mode = 0644, |
317a76f9 | 579 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 580 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 581 | }, |
e905a9ed | 582 | { |
15d99e02 RJ |
583 | .procname = "tcp_workaround_signed_windows", |
584 | .data = &sysctl_tcp_workaround_signed_windows, | |
585 | .maxlen = sizeof(int), | |
586 | .mode = 0644, | |
6d9f239a | 587 | .proc_handler = proc_dointvec |
15d99e02 | 588 | }, |
46d3ceab ED |
589 | { |
590 | .procname = "tcp_limit_output_bytes", | |
591 | .data = &sysctl_tcp_limit_output_bytes, | |
592 | .maxlen = sizeof(int), | |
593 | .mode = 0644, | |
594 | .proc_handler = proc_dointvec | |
595 | }, | |
282f23c6 ED |
596 | { |
597 | .procname = "tcp_challenge_ack_limit", | |
598 | .data = &sysctl_tcp_challenge_ack_limit, | |
599 | .maxlen = sizeof(int), | |
600 | .mode = 0644, | |
601 | .proc_handler = proc_dointvec | |
602 | }, | |
35089bb2 | 603 | { |
35089bb2 DM |
604 | .procname = "tcp_slow_start_after_idle", |
605 | .data = &sysctl_tcp_slow_start_after_idle, | |
606 | .maxlen = sizeof(int), | |
607 | .mode = 0644, | |
6d9f239a | 608 | .proc_handler = proc_dointvec |
35089bb2 | 609 | }, |
446fda4f PM |
610 | #ifdef CONFIG_NETLABEL |
611 | { | |
446fda4f PM |
612 | .procname = "cipso_cache_enable", |
613 | .data = &cipso_v4_cache_enabled, | |
614 | .maxlen = sizeof(int), | |
615 | .mode = 0644, | |
6d9f239a | 616 | .proc_handler = proc_dointvec, |
446fda4f PM |
617 | }, |
618 | { | |
446fda4f PM |
619 | .procname = "cipso_cache_bucket_size", |
620 | .data = &cipso_v4_cache_bucketsize, | |
621 | .maxlen = sizeof(int), | |
622 | .mode = 0644, | |
6d9f239a | 623 | .proc_handler = proc_dointvec, |
446fda4f PM |
624 | }, |
625 | { | |
446fda4f PM |
626 | .procname = "cipso_rbm_optfmt", |
627 | .data = &cipso_v4_rbm_optfmt, | |
628 | .maxlen = sizeof(int), | |
629 | .mode = 0644, | |
6d9f239a | 630 | .proc_handler = proc_dointvec, |
446fda4f PM |
631 | }, |
632 | { | |
446fda4f PM |
633 | .procname = "cipso_rbm_strictvalid", |
634 | .data = &cipso_v4_rbm_strictvalid, | |
635 | .maxlen = sizeof(int), | |
636 | .mode = 0644, | |
6d9f239a | 637 | .proc_handler = proc_dointvec, |
446fda4f PM |
638 | }, |
639 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 640 | { |
3ff825b2 SH |
641 | .procname = "tcp_available_congestion_control", |
642 | .maxlen = TCP_CA_BUF_MAX, | |
643 | .mode = 0444, | |
6d9f239a | 644 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 645 | }, |
ce7bc3bf | 646 | { |
ce7bc3bf SH |
647 | .procname = "tcp_allowed_congestion_control", |
648 | .maxlen = TCP_CA_BUF_MAX, | |
649 | .mode = 0644, | |
6d9f239a | 650 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 651 | }, |
36e31b0a AP |
652 | { |
653 | .procname = "tcp_thin_linear_timeouts", | |
654 | .data = &sysctl_tcp_thin_linear_timeouts, | |
655 | .maxlen = sizeof(int), | |
656 | .mode = 0644, | |
657 | .proc_handler = proc_dointvec | |
658 | }, | |
eed530b6 YC |
659 | { |
660 | .procname = "tcp_early_retrans", | |
661 | .data = &sysctl_tcp_early_retrans, | |
662 | .maxlen = sizeof(int), | |
663 | .mode = 0644, | |
664 | .proc_handler = proc_dointvec_minmax, | |
665 | .extra1 = &zero, | |
6ba8a3b1 | 666 | .extra2 = &four, |
eed530b6 | 667 | }, |
95bd09eb ED |
668 | { |
669 | .procname = "tcp_min_tso_segs", | |
670 | .data = &sysctl_tcp_min_tso_segs, | |
671 | .maxlen = sizeof(int), | |
672 | .mode = 0644, | |
673 | .proc_handler = proc_dointvec_minmax, | |
d6a4e26a | 674 | .extra1 = &one, |
95bd09eb ED |
675 | .extra2 = &gso_max_segs, |
676 | }, | |
43e122b0 ED |
677 | { |
678 | .procname = "tcp_pacing_ss_ratio", | |
679 | .data = &sysctl_tcp_pacing_ss_ratio, | |
680 | .maxlen = sizeof(int), | |
681 | .mode = 0644, | |
682 | .proc_handler = proc_dointvec_minmax, | |
683 | .extra1 = &zero, | |
684 | .extra2 = &thousand, | |
685 | }, | |
686 | { | |
687 | .procname = "tcp_pacing_ca_ratio", | |
688 | .data = &sysctl_tcp_pacing_ca_ratio, | |
689 | .maxlen = sizeof(int), | |
690 | .mode = 0644, | |
691 | .proc_handler = proc_dointvec_minmax, | |
692 | .extra1 = &zero, | |
693 | .extra2 = &thousand, | |
694 | }, | |
f54b3111 ED |
695 | { |
696 | .procname = "tcp_autocorking", | |
697 | .data = &sysctl_tcp_autocorking, | |
698 | .maxlen = sizeof(int), | |
699 | .mode = 0644, | |
700 | .proc_handler = proc_dointvec_minmax, | |
701 | .extra1 = &zero, | |
702 | .extra2 = &one, | |
703 | }, | |
032ee423 NC |
704 | { |
705 | .procname = "tcp_invalid_ratelimit", | |
706 | .data = &sysctl_tcp_invalid_ratelimit, | |
707 | .maxlen = sizeof(int), | |
708 | .mode = 0644, | |
709 | .proc_handler = proc_dointvec_ms_jiffies, | |
710 | }, | |
734942cc DW |
711 | { |
712 | .procname = "tcp_available_ulp", | |
713 | .maxlen = TCP_ULP_BUF_MAX, | |
714 | .mode = 0444, | |
715 | .proc_handler = proc_tcp_available_ulp, | |
716 | }, | |
4cdf507d ED |
717 | { |
718 | .procname = "icmp_msgs_per_sec", | |
719 | .data = &sysctl_icmp_msgs_per_sec, | |
720 | .maxlen = sizeof(int), | |
721 | .mode = 0644, | |
722 | .proc_handler = proc_dointvec_minmax, | |
723 | .extra1 = &zero, | |
724 | }, | |
725 | { | |
726 | .procname = "icmp_msgs_burst", | |
727 | .data = &sysctl_icmp_msgs_burst, | |
728 | .maxlen = sizeof(int), | |
729 | .mode = 0644, | |
730 | .proc_handler = proc_dointvec_minmax, | |
731 | .extra1 = &zero, | |
732 | }, | |
95766fff | 733 | { |
95766fff HA |
734 | .procname = "udp_mem", |
735 | .data = &sysctl_udp_mem, | |
736 | .maxlen = sizeof(sysctl_udp_mem), | |
737 | .mode = 0644, | |
8d987e5c | 738 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
739 | }, |
740 | { | |
95766fff HA |
741 | .procname = "udp_rmem_min", |
742 | .data = &sysctl_udp_rmem_min, | |
743 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
744 | .mode = 0644, | |
6d9f239a | 745 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 746 | .extra1 = &one |
95766fff HA |
747 | }, |
748 | { | |
95766fff HA |
749 | .procname = "udp_wmem_min", |
750 | .data = &sysctl_udp_wmem_min, | |
751 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
752 | .mode = 0644, | |
6d9f239a | 753 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 754 | .extra1 = &one |
95766fff | 755 | }, |
f8572d8f | 756 | { } |
1da177e4 | 757 | }; |
3e37c3f9 | 758 | |
68528f09 PE |
759 | static struct ctl_table ipv4_net_table[] = { |
760 | { | |
68528f09 PE |
761 | .procname = "icmp_echo_ignore_all", |
762 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
763 | .maxlen = sizeof(int), | |
764 | .mode = 0644, | |
6d9f239a | 765 | .proc_handler = proc_dointvec |
68528f09 PE |
766 | }, |
767 | { | |
68528f09 PE |
768 | .procname = "icmp_echo_ignore_broadcasts", |
769 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
770 | .maxlen = sizeof(int), | |
771 | .mode = 0644, | |
6d9f239a | 772 | .proc_handler = proc_dointvec |
68528f09 PE |
773 | }, |
774 | { | |
68528f09 PE |
775 | .procname = "icmp_ignore_bogus_error_responses", |
776 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
777 | .maxlen = sizeof(int), | |
778 | .mode = 0644, | |
6d9f239a | 779 | .proc_handler = proc_dointvec |
68528f09 PE |
780 | }, |
781 | { | |
68528f09 PE |
782 | .procname = "icmp_errors_use_inbound_ifaddr", |
783 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
784 | .maxlen = sizeof(int), | |
785 | .mode = 0644, | |
6d9f239a | 786 | .proc_handler = proc_dointvec |
68528f09 PE |
787 | }, |
788 | { | |
68528f09 PE |
789 | .procname = "icmp_ratelimit", |
790 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
791 | .maxlen = sizeof(int), | |
792 | .mode = 0644, | |
6d9f239a | 793 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
794 | }, |
795 | { | |
68528f09 PE |
796 | .procname = "icmp_ratemask", |
797 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
798 | .maxlen = sizeof(int), | |
799 | .mode = 0644, | |
6d9f239a | 800 | .proc_handler = proc_dointvec |
68528f09 | 801 | }, |
c319b4d7 VK |
802 | { |
803 | .procname = "ping_group_range", | |
ba6b918a | 804 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 805 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
806 | .mode = 0644, |
807 | .proc_handler = ipv4_ping_group_range, | |
808 | }, | |
5d134f1c HFS |
809 | { |
810 | .procname = "tcp_ecn", | |
811 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
812 | .maxlen = sizeof(int), | |
813 | .mode = 0644, | |
814 | .proc_handler = proc_dointvec | |
815 | }, | |
49213555 DB |
816 | { |
817 | .procname = "tcp_ecn_fallback", | |
818 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
819 | .maxlen = sizeof(int), | |
820 | .mode = 0644, | |
821 | .proc_handler = proc_dointvec | |
822 | }, | |
287b7f38 NB |
823 | { |
824 | .procname = "ip_dynaddr", | |
825 | .data = &init_net.ipv4.sysctl_ip_dynaddr, | |
826 | .maxlen = sizeof(int), | |
827 | .mode = 0644, | |
828 | .proc_handler = proc_dointvec | |
829 | }, | |
e21145a9 NB |
830 | { |
831 | .procname = "ip_early_demux", | |
832 | .data = &init_net.ipv4.sysctl_ip_early_demux, | |
833 | .maxlen = sizeof(int), | |
834 | .mode = 0644, | |
835 | .proc_handler = proc_dointvec | |
836 | }, | |
dddb64bc SAK |
837 | { |
838 | .procname = "udp_early_demux", | |
839 | .data = &init_net.ipv4.sysctl_udp_early_demux, | |
840 | .maxlen = sizeof(int), | |
841 | .mode = 0644, | |
842 | .proc_handler = proc_udp_early_demux | |
843 | }, | |
844 | { | |
845 | .procname = "tcp_early_demux", | |
846 | .data = &init_net.ipv4.sysctl_tcp_early_demux, | |
847 | .maxlen = sizeof(int), | |
848 | .mode = 0644, | |
849 | .proc_handler = proc_tcp_early_demux | |
850 | }, | |
fa50d974 NB |
851 | { |
852 | .procname = "ip_default_ttl", | |
853 | .data = &init_net.ipv4.sysctl_ip_default_ttl, | |
854 | .maxlen = sizeof(int), | |
855 | .mode = 0644, | |
856 | .proc_handler = proc_dointvec_minmax, | |
857 | .extra1 = &ip_ttl_min, | |
858 | .extra2 = &ip_ttl_max, | |
859 | }, | |
0bbf87d8 EB |
860 | { |
861 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
862 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
863 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
864 | .mode = 0644, |
865 | .proc_handler = ipv4_local_port_range, | |
866 | }, | |
122ff243 WC |
867 | { |
868 | .procname = "ip_local_reserved_ports", | |
869 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
870 | .maxlen = 65536, | |
871 | .mode = 0644, | |
872 | .proc_handler = proc_do_large_bitmap, | |
873 | }, | |
974eda11 HFS |
874 | { |
875 | .procname = "ip_no_pmtu_disc", | |
876 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
877 | .maxlen = sizeof(int), | |
878 | .mode = 0644, | |
879 | .proc_handler = proc_dointvec | |
880 | }, | |
f87c10a8 HFS |
881 | { |
882 | .procname = "ip_forward_use_pmtu", | |
883 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
884 | .maxlen = sizeof(int), | |
885 | .mode = 0644, | |
886 | .proc_handler = proc_dointvec, | |
887 | }, | |
49a60158 VB |
888 | { |
889 | .procname = "ip_nonlocal_bind", | |
890 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
891 | .maxlen = sizeof(int), | |
892 | .mode = 0644, | |
893 | .proc_handler = proc_dointvec | |
894 | }, | |
e110861f LC |
895 | { |
896 | .procname = "fwmark_reflect", | |
897 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
898 | .maxlen = sizeof(int), | |
899 | .mode = 0644, | |
900 | .proc_handler = proc_dointvec, | |
901 | }, | |
84f39b08 LC |
902 | { |
903 | .procname = "tcp_fwmark_accept", | |
904 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
905 | .maxlen = sizeof(int), | |
906 | .mode = 0644, | |
907 | .proc_handler = proc_dointvec, | |
908 | }, | |
6dd9a14e DA |
909 | #ifdef CONFIG_NET_L3_MASTER_DEV |
910 | { | |
911 | .procname = "tcp_l3mdev_accept", | |
912 | .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, | |
913 | .maxlen = sizeof(int), | |
914 | .mode = 0644, | |
915 | .proc_handler = proc_dointvec_minmax, | |
916 | .extra1 = &zero, | |
917 | .extra2 = &one, | |
918 | }, | |
919 | #endif | |
b0f9ca53 FD |
920 | { |
921 | .procname = "tcp_mtu_probing", | |
922 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
923 | .maxlen = sizeof(int), | |
924 | .mode = 0644, | |
925 | .proc_handler = proc_dointvec, | |
926 | }, | |
927 | { | |
928 | .procname = "tcp_base_mss", | |
929 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
930 | .maxlen = sizeof(int), | |
931 | .mode = 0644, | |
932 | .proc_handler = proc_dointvec, | |
933 | }, | |
6b58e0a5 FD |
934 | { |
935 | .procname = "tcp_probe_threshold", | |
936 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
937 | .maxlen = sizeof(int), | |
938 | .mode = 0644, | |
939 | .proc_handler = proc_dointvec, | |
940 | }, | |
05cbc0db FD |
941 | { |
942 | .procname = "tcp_probe_interval", | |
943 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
944 | .maxlen = sizeof(int), | |
945 | .mode = 0644, | |
946 | .proc_handler = proc_dointvec, | |
947 | }, | |
df2cf4a7 PD |
948 | { |
949 | .procname = "igmp_link_local_mcast_reports", | |
87a8a2ae | 950 | .data = &init_net.ipv4.sysctl_igmp_llm_reports, |
df2cf4a7 PD |
951 | .maxlen = sizeof(int), |
952 | .mode = 0644, | |
953 | .proc_handler = proc_dointvec | |
954 | }, | |
815c5270 NB |
955 | { |
956 | .procname = "igmp_max_memberships", | |
957 | .data = &init_net.ipv4.sysctl_igmp_max_memberships, | |
958 | .maxlen = sizeof(int), | |
959 | .mode = 0644, | |
960 | .proc_handler = proc_dointvec | |
961 | }, | |
166b6b2d NB |
962 | { |
963 | .procname = "igmp_max_msf", | |
964 | .data = &init_net.ipv4.sysctl_igmp_max_msf, | |
965 | .maxlen = sizeof(int), | |
966 | .mode = 0644, | |
967 | .proc_handler = proc_dointvec | |
968 | }, | |
165094af NB |
969 | #ifdef CONFIG_IP_MULTICAST |
970 | { | |
971 | .procname = "igmp_qrv", | |
972 | .data = &init_net.ipv4.sysctl_igmp_qrv, | |
973 | .maxlen = sizeof(int), | |
974 | .mode = 0644, | |
975 | .proc_handler = proc_dointvec_minmax, | |
976 | .extra1 = &one | |
977 | }, | |
978 | #endif | |
13b287e8 NB |
979 | { |
980 | .procname = "tcp_keepalive_time", | |
981 | .data = &init_net.ipv4.sysctl_tcp_keepalive_time, | |
982 | .maxlen = sizeof(int), | |
983 | .mode = 0644, | |
984 | .proc_handler = proc_dointvec_jiffies, | |
985 | }, | |
9bd6861b NB |
986 | { |
987 | .procname = "tcp_keepalive_probes", | |
988 | .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, | |
989 | .maxlen = sizeof(int), | |
990 | .mode = 0644, | |
991 | .proc_handler = proc_dointvec | |
992 | }, | |
b840d15d NB |
993 | { |
994 | .procname = "tcp_keepalive_intvl", | |
995 | .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, | |
996 | .maxlen = sizeof(int), | |
997 | .mode = 0644, | |
998 | .proc_handler = proc_dointvec_jiffies, | |
999 | }, | |
6fa25166 NB |
1000 | { |
1001 | .procname = "tcp_syn_retries", | |
1002 | .data = &init_net.ipv4.sysctl_tcp_syn_retries, | |
1003 | .maxlen = sizeof(int), | |
1004 | .mode = 0644, | |
1005 | .proc_handler = proc_dointvec_minmax, | |
1006 | .extra1 = &tcp_syn_retries_min, | |
1007 | .extra2 = &tcp_syn_retries_max | |
1008 | }, | |
7c083ecb NB |
1009 | { |
1010 | .procname = "tcp_synack_retries", | |
1011 | .data = &init_net.ipv4.sysctl_tcp_synack_retries, | |
1012 | .maxlen = sizeof(int), | |
1013 | .mode = 0644, | |
1014 | .proc_handler = proc_dointvec | |
1015 | }, | |
12ed8244 NB |
1016 | #ifdef CONFIG_SYN_COOKIES |
1017 | { | |
1018 | .procname = "tcp_syncookies", | |
1019 | .data = &init_net.ipv4.sysctl_tcp_syncookies, | |
1020 | .maxlen = sizeof(int), | |
1021 | .mode = 0644, | |
1022 | .proc_handler = proc_dointvec | |
1023 | }, | |
1024 | #endif | |
1043e25f NB |
1025 | { |
1026 | .procname = "tcp_reordering", | |
1027 | .data = &init_net.ipv4.sysctl_tcp_reordering, | |
1028 | .maxlen = sizeof(int), | |
1029 | .mode = 0644, | |
1030 | .proc_handler = proc_dointvec | |
1031 | }, | |
ae5c3f40 NB |
1032 | { |
1033 | .procname = "tcp_retries1", | |
1034 | .data = &init_net.ipv4.sysctl_tcp_retries1, | |
1035 | .maxlen = sizeof(int), | |
1036 | .mode = 0644, | |
1037 | .proc_handler = proc_dointvec_minmax, | |
1038 | .extra2 = &tcp_retr1_max | |
1039 | }, | |
c6214a97 NB |
1040 | { |
1041 | .procname = "tcp_retries2", | |
1042 | .data = &init_net.ipv4.sysctl_tcp_retries2, | |
1043 | .maxlen = sizeof(int), | |
1044 | .mode = 0644, | |
1045 | .proc_handler = proc_dointvec | |
1046 | }, | |
c402d9be NB |
1047 | { |
1048 | .procname = "tcp_orphan_retries", | |
1049 | .data = &init_net.ipv4.sysctl_tcp_orphan_retries, | |
1050 | .maxlen = sizeof(int), | |
1051 | .mode = 0644, | |
1052 | .proc_handler = proc_dointvec | |
1053 | }, | |
1e579caa NB |
1054 | { |
1055 | .procname = "tcp_fin_timeout", | |
1056 | .data = &init_net.ipv4.sysctl_tcp_fin_timeout, | |
1057 | .maxlen = sizeof(int), | |
1058 | .mode = 0644, | |
1059 | .proc_handler = proc_dointvec_jiffies, | |
1060 | }, | |
4979f2d9 NB |
1061 | { |
1062 | .procname = "tcp_notsent_lowat", | |
1063 | .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, | |
1064 | .maxlen = sizeof(unsigned int), | |
1065 | .mode = 0644, | |
b007f090 | 1066 | .proc_handler = proc_douintvec, |
4979f2d9 | 1067 | }, |
56ab6b93 HY |
1068 | { |
1069 | .procname = "tcp_tw_reuse", | |
1070 | .data = &init_net.ipv4.sysctl_tcp_tw_reuse, | |
1071 | .maxlen = sizeof(int), | |
1072 | .mode = 0644, | |
1073 | .proc_handler = proc_dointvec | |
1074 | }, | |
1946e672 HY |
1075 | { |
1076 | .procname = "tcp_max_tw_buckets", | |
1077 | .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, | |
1078 | .maxlen = sizeof(int), | |
1079 | .mode = 0644, | |
1080 | .proc_handler = proc_dointvec | |
1081 | }, | |
fee83d09 HY |
1082 | { |
1083 | .procname = "tcp_max_syn_backlog", | |
1084 | .data = &init_net.ipv4.sysctl_max_syn_backlog, | |
1085 | .maxlen = sizeof(int), | |
1086 | .mode = 0644, | |
1087 | .proc_handler = proc_dointvec | |
1088 | }, | |
a6db4494 DA |
1089 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
1090 | { | |
1091 | .procname = "fib_multipath_use_neigh", | |
1092 | .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, | |
1093 | .maxlen = sizeof(int), | |
1094 | .mode = 0644, | |
1095 | .proc_handler = proc_dointvec_minmax, | |
bf4e0a3d NA |
1096 | .extra1 = &zero, |
1097 | .extra2 = &one, | |
1098 | }, | |
1099 | { | |
1100 | .procname = "fib_multipath_hash_policy", | |
1101 | .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy, | |
1102 | .maxlen = sizeof(int), | |
1103 | .mode = 0644, | |
1104 | .proc_handler = proc_dointvec_minmax, | |
a6db4494 DA |
1105 | .extra1 = &zero, |
1106 | .extra2 = &one, | |
1107 | }, | |
1108 | #endif | |
4548b683 KJ |
1109 | { |
1110 | .procname = "ip_unprivileged_port_start", | |
1111 | .maxlen = sizeof(int), | |
1112 | .data = &init_net.ipv4.sysctl_ip_prot_sock, | |
1113 | .mode = 0644, | |
1114 | .proc_handler = ipv4_privileged_ports, | |
1115 | }, | |
63a6fff3 RS |
1116 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1117 | { | |
1118 | .procname = "udp_l3mdev_accept", | |
1119 | .data = &init_net.ipv4.sysctl_udp_l3mdev_accept, | |
1120 | .maxlen = sizeof(int), | |
1121 | .mode = 0644, | |
1122 | .proc_handler = proc_dointvec_minmax, | |
1123 | .extra1 = &zero, | |
1124 | .extra2 = &one, | |
1125 | }, | |
1126 | #endif | |
f9301034 ED |
1127 | { |
1128 | .procname = "tcp_sack", | |
1129 | .data = &init_net.ipv4.sysctl_tcp_sack, | |
1130 | .maxlen = sizeof(int), | |
1131 | .mode = 0644, | |
1132 | .proc_handler = proc_dointvec | |
1133 | }, | |
9bb37ef0 ED |
1134 | { |
1135 | .procname = "tcp_window_scaling", | |
1136 | .data = &init_net.ipv4.sysctl_tcp_window_scaling, | |
1137 | .maxlen = sizeof(int), | |
1138 | .mode = 0644, | |
1139 | .proc_handler = proc_dointvec | |
1140 | }, | |
5d2ed052 ED |
1141 | { |
1142 | .procname = "tcp_timestamps", | |
1143 | .data = &init_net.ipv4.sysctl_tcp_timestamps, | |
1144 | .maxlen = sizeof(int), | |
1145 | .mode = 0644, | |
1146 | .proc_handler = proc_dointvec | |
1147 | }, | |
68528f09 PE |
1148 | { } |
1149 | }; | |
1150 | ||
1577519d PE |
1151 | static __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 |
1178 | err_ports: |
1179 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 1180 | err_reg: |
09ad9bc7 | 1181 | if (!net_eq(net, &init_net)) |
68528f09 PE |
1182 | kfree(table); |
1183 | err_alloc: | |
1184 | return -ENOMEM; | |
1577519d PE |
1185 | } |
1186 | ||
1187 | static __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 | ||
1197 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
1198 | .init = ipv4_sysctl_init_net, | |
1199 | .exit = ipv4_sysctl_exit_net, | |
1200 | }; | |
1201 | ||
3e37c3f9 PE |
1202 | static __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); |