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Commit | Line | Data |
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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 | 29 | static int zero; |
cdda8891 | 30 | static int one = 1; |
6ba8a3b1 | 31 | static int four = 4; |
43e122b0 | 32 | static int thousand = 1000; |
95bd09eb | 33 | static int gso_max_segs = GSO_MAX_SEGS; |
e905a9ed | 34 | static int tcp_retr1_max = 255; |
1da177e4 LT |
35 | static int ip_local_port_range_min[] = { 1, 1 }; |
36 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
37 | static int tcp_adv_win_scale_min = -31; |
38 | static int tcp_adv_win_scale_max = 31; | |
4548b683 KJ |
39 | static int ip_privileged_port_min; |
40 | static int ip_privileged_port_max = 65535; | |
249fab77 ED |
41 | static int ip_ttl_min = 1; |
42 | static int ip_ttl_max = 255; | |
651e9271 MT |
43 | static int tcp_syn_retries_min = 1; |
44 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; | |
c319b4d7 VK |
45 | static int ip_ping_group_range_min[] = { 0, 0 }; |
46 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 47 | |
227b60f5 | 48 | /* Update system visible IP port range */ |
0bbf87d8 | 49 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 50 | { |
ed2dfd90 ED |
51 | bool same_parity = !((range[0] ^ range[1]) & 1); |
52 | ||
4ee3bd4a | 53 | write_seqlock_bh(&net->ipv4.ip_local_ports.lock); |
ed2dfd90 ED |
54 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
55 | net->ipv4.ip_local_ports.warned = true; | |
56 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); | |
57 | } | |
c9d8f1a6 CW |
58 | net->ipv4.ip_local_ports.range[0] = range[0]; |
59 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
4ee3bd4a | 60 | write_sequnlock_bh(&net->ipv4.ip_local_ports.lock); |
227b60f5 SH |
61 | } |
62 | ||
63 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 64 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
65 | void __user *buffer, |
66 | size_t *lenp, loff_t *ppos) | |
67 | { | |
0bbf87d8 | 68 | struct net *net = |
c9d8f1a6 | 69 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 70 | int ret; |
3c689b73 | 71 | int range[2]; |
fe2c6338 | 72 | struct ctl_table tmp = { |
227b60f5 SH |
73 | .data = &range, |
74 | .maxlen = sizeof(range), | |
75 | .mode = table->mode, | |
76 | .extra1 = &ip_local_port_range_min, | |
77 | .extra2 = &ip_local_port_range_max, | |
78 | }; | |
79 | ||
0bbf87d8 EB |
80 | inet_get_local_port_range(net, &range[0], &range[1]); |
81 | ||
8d65af78 | 82 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
83 | |
84 | if (write && ret == 0) { | |
4548b683 KJ |
85 | /* Ensure that the upper limit is not smaller than the lower, |
86 | * and that the lower does not encroach upon the privileged | |
87 | * port limit. | |
88 | */ | |
89 | if ((range[1] < range[0]) || | |
90 | (range[0] < net->ipv4.sysctl_ip_prot_sock)) | |
227b60f5 SH |
91 | ret = -EINVAL; |
92 | else | |
0bbf87d8 | 93 | set_local_port_range(net, range); |
227b60f5 SH |
94 | } |
95 | ||
96 | return ret; | |
97 | } | |
98 | ||
4548b683 KJ |
99 | /* Validate changes from /proc interface. */ |
100 | static int ipv4_privileged_ports(struct ctl_table *table, int write, | |
101 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
102 | { | |
103 | struct net *net = container_of(table->data, struct net, | |
104 | ipv4.sysctl_ip_prot_sock); | |
105 | int ret; | |
106 | int pports; | |
107 | int range[2]; | |
108 | struct ctl_table tmp = { | |
109 | .data = &pports, | |
110 | .maxlen = sizeof(pports), | |
111 | .mode = table->mode, | |
112 | .extra1 = &ip_privileged_port_min, | |
113 | .extra2 = &ip_privileged_port_max, | |
114 | }; | |
115 | ||
116 | pports = net->ipv4.sysctl_ip_prot_sock; | |
117 | ||
118 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
119 | ||
120 | if (write && ret == 0) { | |
121 | inet_get_local_port_range(net, &range[0], &range[1]); | |
122 | /* Ensure that the local port range doesn't overlap with the | |
123 | * privileged port range. | |
124 | */ | |
125 | if (range[0] < pports) | |
126 | ret = -EINVAL; | |
127 | else | |
128 | net->ipv4.sysctl_ip_prot_sock = pports; | |
129 | } | |
130 | ||
131 | return ret; | |
132 | } | |
c319b4d7 | 133 | |
7064d16e | 134 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 135 | { |
7064d16e | 136 | kgid_t *data = table->data; |
0bbf87d8 | 137 | struct net *net = |
ba6b918a | 138 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 139 | unsigned int seq; |
c319b4d7 | 140 | do { |
396a30cc | 141 | seq = read_seqbegin(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
142 | |
143 | *low = data[0]; | |
144 | *high = data[1]; | |
396a30cc | 145 | } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq)); |
c319b4d7 VK |
146 | } |
147 | ||
148 | /* Update system visible IP port range */ | |
7064d16e | 149 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 150 | { |
7064d16e | 151 | kgid_t *data = table->data; |
0bbf87d8 | 152 | struct net *net = |
ba6b918a | 153 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
396a30cc | 154 | write_seqlock(&net->ipv4.ping_group_range.lock); |
7064d16e EB |
155 | data[0] = low; |
156 | data[1] = high; | |
396a30cc | 157 | write_sequnlock(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
158 | } |
159 | ||
160 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 161 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
162 | void __user *buffer, |
163 | size_t *lenp, loff_t *ppos) | |
164 | { | |
7064d16e | 165 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 166 | int ret; |
7064d16e EB |
167 | gid_t urange[2]; |
168 | kgid_t low, high; | |
fe2c6338 | 169 | struct ctl_table tmp = { |
7064d16e EB |
170 | .data = &urange, |
171 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
172 | .mode = table->mode, |
173 | .extra1 = &ip_ping_group_range_min, | |
174 | .extra2 = &ip_ping_group_range_max, | |
175 | }; | |
176 | ||
7064d16e EB |
177 | inet_get_ping_group_range_table(table, &low, &high); |
178 | urange[0] = from_kgid_munged(user_ns, low); | |
179 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
180 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
181 | ||
7064d16e EB |
182 | if (write && ret == 0) { |
183 | low = make_kgid(user_ns, urange[0]); | |
184 | high = make_kgid(user_ns, urange[1]); | |
185 | if (!gid_valid(low) || !gid_valid(high) || | |
186 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
187 | low = make_kgid(&init_user_ns, 1); | |
188 | high = make_kgid(&init_user_ns, 0); | |
189 | } | |
190 | set_ping_group_range(table, low, high); | |
191 | } | |
c319b4d7 VK |
192 | |
193 | return ret; | |
194 | } | |
195 | ||
fe2c6338 | 196 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
197 | void __user *buffer, size_t *lenp, loff_t *ppos) |
198 | { | |
199 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 200 | struct ctl_table tbl = { |
317a76f9 SH |
201 | .data = val, |
202 | .maxlen = TCP_CA_NAME_MAX, | |
203 | }; | |
204 | int ret; | |
205 | ||
206 | tcp_get_default_congestion_control(val); | |
207 | ||
8d65af78 | 208 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
209 | if (write && ret == 0) |
210 | ret = tcp_set_default_congestion_control(val); | |
211 | return ret; | |
212 | } | |
213 | ||
fe2c6338 | 214 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 215 | int write, |
3ff825b2 SH |
216 | void __user *buffer, size_t *lenp, |
217 | loff_t *ppos) | |
218 | { | |
fe2c6338 | 219 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
220 | int ret; |
221 | ||
222 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
223 | if (!tbl.data) | |
224 | return -ENOMEM; | |
225 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 226 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
227 | kfree(tbl.data); |
228 | return ret; | |
229 | } | |
230 | ||
fe2c6338 | 231 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 232 | int write, |
ce7bc3bf SH |
233 | void __user *buffer, size_t *lenp, |
234 | loff_t *ppos) | |
235 | { | |
fe2c6338 | 236 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
237 | int ret; |
238 | ||
239 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
240 | if (!tbl.data) | |
241 | return -ENOMEM; | |
242 | ||
243 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 244 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
245 | if (write && ret == 0) |
246 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
247 | kfree(tbl.data); | |
248 | return ret; | |
249 | } | |
250 | ||
fe2c6338 JP |
251 | static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write, |
252 | void __user *buffer, size_t *lenp, | |
253 | loff_t *ppos) | |
10467163 | 254 | { |
fe2c6338 | 255 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
256 | struct tcp_fastopen_context *ctxt; |
257 | int ret; | |
258 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
259 | ||
260 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
261 | if (!tbl.data) | |
262 | return -ENOMEM; | |
263 | ||
264 | rcu_read_lock(); | |
265 | ctxt = rcu_dereference(tcp_fastopen_ctx); | |
266 | if (ctxt) | |
267 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
268 | else |
269 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
270 | rcu_read_unlock(); |
271 | ||
272 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
273 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
274 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
275 | ||
276 | if (write && ret == 0) { | |
277 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
278 | user_key + 2, user_key + 3) != 4) { | |
279 | ret = -EINVAL; | |
280 | goto bad_key; | |
281 | } | |
222e83d2 HFS |
282 | /* Generate a dummy secret but don't publish it. This |
283 | * is needed so we don't regenerate a new key on the | |
284 | * first invocation of tcp_fastopen_cookie_gen | |
285 | */ | |
286 | tcp_fastopen_init_key_once(false); | |
10467163 JC |
287 | tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH); |
288 | } | |
289 | ||
290 | bad_key: | |
291 | pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", | |
292 | user_key[0], user_key[1], user_key[2], user_key[3], | |
293 | (char *)tbl.data, ret); | |
294 | kfree(tbl.data); | |
295 | return ret; | |
296 | } | |
297 | ||
dddb64bc SAK |
298 | static void proc_configure_early_demux(int enabled, int protocol) |
299 | { | |
300 | struct net_protocol *ipprot; | |
301 | #if IS_ENABLED(CONFIG_IPV6) | |
302 | struct inet6_protocol *ip6prot; | |
303 | #endif | |
304 | ||
58c4c6a3 DA |
305 | rcu_read_lock(); |
306 | ||
dddb64bc SAK |
307 | ipprot = rcu_dereference(inet_protos[protocol]); |
308 | if (ipprot) | |
309 | ipprot->early_demux = enabled ? ipprot->early_demux_handler : | |
310 | NULL; | |
311 | ||
312 | #if IS_ENABLED(CONFIG_IPV6) | |
313 | ip6prot = rcu_dereference(inet6_protos[protocol]); | |
314 | if (ip6prot) | |
315 | ip6prot->early_demux = enabled ? ip6prot->early_demux_handler : | |
316 | NULL; | |
317 | #endif | |
58c4c6a3 | 318 | rcu_read_unlock(); |
dddb64bc SAK |
319 | } |
320 | ||
321 | static int proc_tcp_early_demux(struct ctl_table *table, int write, | |
322 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
323 | { | |
324 | int ret = 0; | |
325 | ||
326 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
327 | ||
328 | if (write && !ret) { | |
329 | int enabled = init_net.ipv4.sysctl_tcp_early_demux; | |
330 | ||
331 | proc_configure_early_demux(enabled, IPPROTO_TCP); | |
332 | } | |
333 | ||
334 | return ret; | |
335 | } | |
336 | ||
337 | static int proc_udp_early_demux(struct ctl_table *table, int write, | |
338 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
339 | { | |
340 | int ret = 0; | |
341 | ||
342 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
343 | ||
344 | if (write && !ret) { | |
345 | int enabled = init_net.ipv4.sysctl_udp_early_demux; | |
346 | ||
347 | proc_configure_early_demux(enabled, IPPROTO_UDP); | |
348 | } | |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
3e37c3f9 | 353 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 354 | { |
1da177e4 LT |
355 | .procname = "tcp_timestamps", |
356 | .data = &sysctl_tcp_timestamps, | |
357 | .maxlen = sizeof(int), | |
358 | .mode = 0644, | |
6d9f239a | 359 | .proc_handler = proc_dointvec |
1da177e4 | 360 | }, |
e905a9ed | 361 | { |
1da177e4 LT |
362 | .procname = "tcp_window_scaling", |
363 | .data = &sysctl_tcp_window_scaling, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
6d9f239a | 366 | .proc_handler = proc_dointvec |
1da177e4 | 367 | }, |
e905a9ed | 368 | { |
1da177e4 LT |
369 | .procname = "tcp_sack", |
370 | .data = &sysctl_tcp_sack, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
6d9f239a | 373 | .proc_handler = proc_dointvec |
1da177e4 | 374 | }, |
e905a9ed | 375 | { |
1da177e4 LT |
376 | .procname = "tcp_retrans_collapse", |
377 | .data = &sysctl_tcp_retrans_collapse, | |
378 | .maxlen = sizeof(int), | |
379 | .mode = 0644, | |
6d9f239a | 380 | .proc_handler = proc_dointvec |
1da177e4 | 381 | }, |
1da177e4 | 382 | { |
1da177e4 LT |
383 | .procname = "tcp_max_orphans", |
384 | .data = &sysctl_tcp_max_orphans, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
6d9f239a | 387 | .proc_handler = proc_dointvec |
1da177e4 | 388 | }, |
2100c8d2 YC |
389 | { |
390 | .procname = "tcp_fastopen", | |
391 | .data = &sysctl_tcp_fastopen, | |
392 | .maxlen = sizeof(int), | |
393 | .mode = 0644, | |
394 | .proc_handler = proc_dointvec, | |
395 | }, | |
10467163 JC |
396 | { |
397 | .procname = "tcp_fastopen_key", | |
398 | .mode = 0600, | |
399 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
400 | .proc_handler = proc_tcp_fastopen_key, | |
401 | }, | |
1da177e4 | 402 | { |
1da177e4 LT |
403 | .procname = "tcp_abort_on_overflow", |
404 | .data = &sysctl_tcp_abort_on_overflow, | |
405 | .maxlen = sizeof(int), | |
406 | .mode = 0644, | |
6d9f239a | 407 | .proc_handler = proc_dointvec |
1da177e4 LT |
408 | }, |
409 | { | |
1da177e4 LT |
410 | .procname = "tcp_stdurg", |
411 | .data = &sysctl_tcp_stdurg, | |
412 | .maxlen = sizeof(int), | |
413 | .mode = 0644, | |
6d9f239a | 414 | .proc_handler = proc_dointvec |
1da177e4 LT |
415 | }, |
416 | { | |
1da177e4 LT |
417 | .procname = "tcp_rfc1337", |
418 | .data = &sysctl_tcp_rfc1337, | |
419 | .maxlen = sizeof(int), | |
420 | .mode = 0644, | |
6d9f239a | 421 | .proc_handler = proc_dointvec |
1da177e4 | 422 | }, |
1da177e4 | 423 | { |
1da177e4 LT |
424 | .procname = "inet_peer_threshold", |
425 | .data = &inet_peer_threshold, | |
426 | .maxlen = sizeof(int), | |
427 | .mode = 0644, | |
6d9f239a | 428 | .proc_handler = proc_dointvec |
1da177e4 LT |
429 | }, |
430 | { | |
1da177e4 LT |
431 | .procname = "inet_peer_minttl", |
432 | .data = &inet_peer_minttl, | |
433 | .maxlen = sizeof(int), | |
434 | .mode = 0644, | |
6d9f239a | 435 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
436 | }, |
437 | { | |
1da177e4 LT |
438 | .procname = "inet_peer_maxttl", |
439 | .data = &inet_peer_maxttl, | |
440 | .maxlen = sizeof(int), | |
441 | .mode = 0644, | |
6d9f239a | 442 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 443 | }, |
1da177e4 | 444 | { |
1da177e4 LT |
445 | .procname = "tcp_fack", |
446 | .data = &sysctl_tcp_fack, | |
447 | .maxlen = sizeof(int), | |
448 | .mode = 0644, | |
6d9f239a | 449 | .proc_handler = proc_dointvec |
1da177e4 | 450 | }, |
4f41b1c5 YC |
451 | { |
452 | .procname = "tcp_recovery", | |
453 | .data = &sysctl_tcp_recovery, | |
454 | .maxlen = sizeof(int), | |
455 | .mode = 0644, | |
456 | .proc_handler = proc_dointvec, | |
457 | }, | |
dca145ff ED |
458 | { |
459 | .procname = "tcp_max_reordering", | |
460 | .data = &sysctl_tcp_max_reordering, | |
461 | .maxlen = sizeof(int), | |
462 | .mode = 0644, | |
463 | .proc_handler = proc_dointvec | |
464 | }, | |
1da177e4 | 465 | { |
1da177e4 LT |
466 | .procname = "tcp_dsack", |
467 | .data = &sysctl_tcp_dsack, | |
468 | .maxlen = sizeof(int), | |
469 | .mode = 0644, | |
6d9f239a | 470 | .proc_handler = proc_dointvec |
1da177e4 | 471 | }, |
a4fe34bf EB |
472 | { |
473 | .procname = "tcp_mem", | |
474 | .maxlen = sizeof(sysctl_tcp_mem), | |
475 | .data = &sysctl_tcp_mem, | |
476 | .mode = 0644, | |
477 | .proc_handler = proc_doulongvec_minmax, | |
478 | }, | |
1da177e4 | 479 | { |
1da177e4 LT |
480 | .procname = "tcp_wmem", |
481 | .data = &sysctl_tcp_wmem, | |
482 | .maxlen = sizeof(sysctl_tcp_wmem), | |
483 | .mode = 0644, | |
cdda8891 | 484 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 485 | .extra1 = &one, |
1da177e4 LT |
486 | }, |
487 | { | |
1da177e4 LT |
488 | .procname = "tcp_rmem", |
489 | .data = &sysctl_tcp_rmem, | |
490 | .maxlen = sizeof(sysctl_tcp_rmem), | |
491 | .mode = 0644, | |
cdda8891 | 492 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 493 | .extra1 = &one, |
1da177e4 LT |
494 | }, |
495 | { | |
1da177e4 LT |
496 | .procname = "tcp_app_win", |
497 | .data = &sysctl_tcp_app_win, | |
498 | .maxlen = sizeof(int), | |
499 | .mode = 0644, | |
6d9f239a | 500 | .proc_handler = proc_dointvec |
1da177e4 LT |
501 | }, |
502 | { | |
1da177e4 LT |
503 | .procname = "tcp_adv_win_scale", |
504 | .data = &sysctl_tcp_adv_win_scale, | |
505 | .maxlen = sizeof(int), | |
506 | .mode = 0644, | |
0147fc05 AD |
507 | .proc_handler = proc_dointvec_minmax, |
508 | .extra1 = &tcp_adv_win_scale_min, | |
509 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 510 | }, |
1da177e4 | 511 | { |
1da177e4 LT |
512 | .procname = "tcp_frto", |
513 | .data = &sysctl_tcp_frto, | |
514 | .maxlen = sizeof(int), | |
f6722583 YC |
515 | .mode = 0644, |
516 | .proc_handler = proc_dointvec | |
517 | }, | |
518 | { | |
519 | .procname = "tcp_min_rtt_wlen", | |
520 | .data = &sysctl_tcp_min_rtt_wlen, | |
521 | .maxlen = sizeof(int), | |
1da177e4 | 522 | .mode = 0644, |
6d9f239a | 523 | .proc_handler = proc_dointvec |
1da177e4 LT |
524 | }, |
525 | { | |
1da177e4 LT |
526 | .procname = "tcp_low_latency", |
527 | .data = &sysctl_tcp_low_latency, | |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
6d9f239a | 530 | .proc_handler = proc_dointvec |
1da177e4 | 531 | }, |
1da177e4 | 532 | { |
1da177e4 LT |
533 | .procname = "tcp_no_metrics_save", |
534 | .data = &sysctl_tcp_nometrics_save, | |
535 | .maxlen = sizeof(int), | |
536 | .mode = 0644, | |
6d9f239a | 537 | .proc_handler = proc_dointvec, |
1da177e4 | 538 | }, |
1da177e4 | 539 | { |
1da177e4 LT |
540 | .procname = "tcp_moderate_rcvbuf", |
541 | .data = &sysctl_tcp_moderate_rcvbuf, | |
542 | .maxlen = sizeof(int), | |
543 | .mode = 0644, | |
6d9f239a | 544 | .proc_handler = proc_dointvec, |
1da177e4 LT |
545 | }, |
546 | { | |
1da177e4 LT |
547 | .procname = "tcp_tso_win_divisor", |
548 | .data = &sysctl_tcp_tso_win_divisor, | |
549 | .maxlen = sizeof(int), | |
550 | .mode = 0644, | |
6d9f239a | 551 | .proc_handler = proc_dointvec, |
1da177e4 LT |
552 | }, |
553 | { | |
317a76f9 | 554 | .procname = "tcp_congestion_control", |
1da177e4 | 555 | .mode = 0644, |
317a76f9 | 556 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 557 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 558 | }, |
e905a9ed | 559 | { |
15d99e02 RJ |
560 | .procname = "tcp_workaround_signed_windows", |
561 | .data = &sysctl_tcp_workaround_signed_windows, | |
562 | .maxlen = sizeof(int), | |
563 | .mode = 0644, | |
6d9f239a | 564 | .proc_handler = proc_dointvec |
15d99e02 | 565 | }, |
46d3ceab ED |
566 | { |
567 | .procname = "tcp_limit_output_bytes", | |
568 | .data = &sysctl_tcp_limit_output_bytes, | |
569 | .maxlen = sizeof(int), | |
570 | .mode = 0644, | |
571 | .proc_handler = proc_dointvec | |
572 | }, | |
282f23c6 ED |
573 | { |
574 | .procname = "tcp_challenge_ack_limit", | |
575 | .data = &sysctl_tcp_challenge_ack_limit, | |
576 | .maxlen = sizeof(int), | |
577 | .mode = 0644, | |
578 | .proc_handler = proc_dointvec | |
579 | }, | |
35089bb2 | 580 | { |
35089bb2 DM |
581 | .procname = "tcp_slow_start_after_idle", |
582 | .data = &sysctl_tcp_slow_start_after_idle, | |
583 | .maxlen = sizeof(int), | |
584 | .mode = 0644, | |
6d9f239a | 585 | .proc_handler = proc_dointvec |
35089bb2 | 586 | }, |
446fda4f PM |
587 | #ifdef CONFIG_NETLABEL |
588 | { | |
446fda4f PM |
589 | .procname = "cipso_cache_enable", |
590 | .data = &cipso_v4_cache_enabled, | |
591 | .maxlen = sizeof(int), | |
592 | .mode = 0644, | |
6d9f239a | 593 | .proc_handler = proc_dointvec, |
446fda4f PM |
594 | }, |
595 | { | |
446fda4f PM |
596 | .procname = "cipso_cache_bucket_size", |
597 | .data = &cipso_v4_cache_bucketsize, | |
598 | .maxlen = sizeof(int), | |
599 | .mode = 0644, | |
6d9f239a | 600 | .proc_handler = proc_dointvec, |
446fda4f PM |
601 | }, |
602 | { | |
446fda4f PM |
603 | .procname = "cipso_rbm_optfmt", |
604 | .data = &cipso_v4_rbm_optfmt, | |
605 | .maxlen = sizeof(int), | |
606 | .mode = 0644, | |
6d9f239a | 607 | .proc_handler = proc_dointvec, |
446fda4f PM |
608 | }, |
609 | { | |
446fda4f PM |
610 | .procname = "cipso_rbm_strictvalid", |
611 | .data = &cipso_v4_rbm_strictvalid, | |
612 | .maxlen = sizeof(int), | |
613 | .mode = 0644, | |
6d9f239a | 614 | .proc_handler = proc_dointvec, |
446fda4f PM |
615 | }, |
616 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 617 | { |
3ff825b2 SH |
618 | .procname = "tcp_available_congestion_control", |
619 | .maxlen = TCP_CA_BUF_MAX, | |
620 | .mode = 0444, | |
6d9f239a | 621 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 622 | }, |
ce7bc3bf | 623 | { |
ce7bc3bf SH |
624 | .procname = "tcp_allowed_congestion_control", |
625 | .maxlen = TCP_CA_BUF_MAX, | |
626 | .mode = 0644, | |
6d9f239a | 627 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 628 | }, |
36e31b0a AP |
629 | { |
630 | .procname = "tcp_thin_linear_timeouts", | |
631 | .data = &sysctl_tcp_thin_linear_timeouts, | |
632 | .maxlen = sizeof(int), | |
633 | .mode = 0644, | |
634 | .proc_handler = proc_dointvec | |
635 | }, | |
eed530b6 YC |
636 | { |
637 | .procname = "tcp_early_retrans", | |
638 | .data = &sysctl_tcp_early_retrans, | |
639 | .maxlen = sizeof(int), | |
640 | .mode = 0644, | |
641 | .proc_handler = proc_dointvec_minmax, | |
642 | .extra1 = &zero, | |
6ba8a3b1 | 643 | .extra2 = &four, |
eed530b6 | 644 | }, |
95bd09eb ED |
645 | { |
646 | .procname = "tcp_min_tso_segs", | |
647 | .data = &sysctl_tcp_min_tso_segs, | |
648 | .maxlen = sizeof(int), | |
649 | .mode = 0644, | |
650 | .proc_handler = proc_dointvec_minmax, | |
d6a4e26a | 651 | .extra1 = &one, |
95bd09eb ED |
652 | .extra2 = &gso_max_segs, |
653 | }, | |
43e122b0 ED |
654 | { |
655 | .procname = "tcp_pacing_ss_ratio", | |
656 | .data = &sysctl_tcp_pacing_ss_ratio, | |
657 | .maxlen = sizeof(int), | |
658 | .mode = 0644, | |
659 | .proc_handler = proc_dointvec_minmax, | |
660 | .extra1 = &zero, | |
661 | .extra2 = &thousand, | |
662 | }, | |
663 | { | |
664 | .procname = "tcp_pacing_ca_ratio", | |
665 | .data = &sysctl_tcp_pacing_ca_ratio, | |
666 | .maxlen = sizeof(int), | |
667 | .mode = 0644, | |
668 | .proc_handler = proc_dointvec_minmax, | |
669 | .extra1 = &zero, | |
670 | .extra2 = &thousand, | |
671 | }, | |
f54b3111 ED |
672 | { |
673 | .procname = "tcp_autocorking", | |
674 | .data = &sysctl_tcp_autocorking, | |
675 | .maxlen = sizeof(int), | |
676 | .mode = 0644, | |
677 | .proc_handler = proc_dointvec_minmax, | |
678 | .extra1 = &zero, | |
679 | .extra2 = &one, | |
680 | }, | |
032ee423 NC |
681 | { |
682 | .procname = "tcp_invalid_ratelimit", | |
683 | .data = &sysctl_tcp_invalid_ratelimit, | |
684 | .maxlen = sizeof(int), | |
685 | .mode = 0644, | |
686 | .proc_handler = proc_dointvec_ms_jiffies, | |
687 | }, | |
4cdf507d ED |
688 | { |
689 | .procname = "icmp_msgs_per_sec", | |
690 | .data = &sysctl_icmp_msgs_per_sec, | |
691 | .maxlen = sizeof(int), | |
692 | .mode = 0644, | |
693 | .proc_handler = proc_dointvec_minmax, | |
694 | .extra1 = &zero, | |
695 | }, | |
696 | { | |
697 | .procname = "icmp_msgs_burst", | |
698 | .data = &sysctl_icmp_msgs_burst, | |
699 | .maxlen = sizeof(int), | |
700 | .mode = 0644, | |
701 | .proc_handler = proc_dointvec_minmax, | |
702 | .extra1 = &zero, | |
703 | }, | |
95766fff | 704 | { |
95766fff HA |
705 | .procname = "udp_mem", |
706 | .data = &sysctl_udp_mem, | |
707 | .maxlen = sizeof(sysctl_udp_mem), | |
708 | .mode = 0644, | |
8d987e5c | 709 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
710 | }, |
711 | { | |
95766fff HA |
712 | .procname = "udp_rmem_min", |
713 | .data = &sysctl_udp_rmem_min, | |
714 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
715 | .mode = 0644, | |
6d9f239a | 716 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 717 | .extra1 = &one |
95766fff HA |
718 | }, |
719 | { | |
95766fff HA |
720 | .procname = "udp_wmem_min", |
721 | .data = &sysctl_udp_wmem_min, | |
722 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
723 | .mode = 0644, | |
6d9f239a | 724 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 725 | .extra1 = &one |
95766fff | 726 | }, |
f8572d8f | 727 | { } |
1da177e4 | 728 | }; |
3e37c3f9 | 729 | |
68528f09 PE |
730 | static struct ctl_table ipv4_net_table[] = { |
731 | { | |
68528f09 PE |
732 | .procname = "icmp_echo_ignore_all", |
733 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
734 | .maxlen = sizeof(int), | |
735 | .mode = 0644, | |
6d9f239a | 736 | .proc_handler = proc_dointvec |
68528f09 PE |
737 | }, |
738 | { | |
68528f09 PE |
739 | .procname = "icmp_echo_ignore_broadcasts", |
740 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
741 | .maxlen = sizeof(int), | |
742 | .mode = 0644, | |
6d9f239a | 743 | .proc_handler = proc_dointvec |
68528f09 PE |
744 | }, |
745 | { | |
68528f09 PE |
746 | .procname = "icmp_ignore_bogus_error_responses", |
747 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
748 | .maxlen = sizeof(int), | |
749 | .mode = 0644, | |
6d9f239a | 750 | .proc_handler = proc_dointvec |
68528f09 PE |
751 | }, |
752 | { | |
68528f09 PE |
753 | .procname = "icmp_errors_use_inbound_ifaddr", |
754 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
755 | .maxlen = sizeof(int), | |
756 | .mode = 0644, | |
6d9f239a | 757 | .proc_handler = proc_dointvec |
68528f09 PE |
758 | }, |
759 | { | |
68528f09 PE |
760 | .procname = "icmp_ratelimit", |
761 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
762 | .maxlen = sizeof(int), | |
763 | .mode = 0644, | |
6d9f239a | 764 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
765 | }, |
766 | { | |
68528f09 PE |
767 | .procname = "icmp_ratemask", |
768 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
769 | .maxlen = sizeof(int), | |
770 | .mode = 0644, | |
6d9f239a | 771 | .proc_handler = proc_dointvec |
68528f09 | 772 | }, |
c319b4d7 VK |
773 | { |
774 | .procname = "ping_group_range", | |
ba6b918a | 775 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 776 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
777 | .mode = 0644, |
778 | .proc_handler = ipv4_ping_group_range, | |
779 | }, | |
5d134f1c HFS |
780 | { |
781 | .procname = "tcp_ecn", | |
782 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
783 | .maxlen = sizeof(int), | |
784 | .mode = 0644, | |
785 | .proc_handler = proc_dointvec | |
786 | }, | |
49213555 DB |
787 | { |
788 | .procname = "tcp_ecn_fallback", | |
789 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
790 | .maxlen = sizeof(int), | |
791 | .mode = 0644, | |
792 | .proc_handler = proc_dointvec | |
793 | }, | |
287b7f38 NB |
794 | { |
795 | .procname = "ip_dynaddr", | |
796 | .data = &init_net.ipv4.sysctl_ip_dynaddr, | |
797 | .maxlen = sizeof(int), | |
798 | .mode = 0644, | |
799 | .proc_handler = proc_dointvec | |
800 | }, | |
e21145a9 NB |
801 | { |
802 | .procname = "ip_early_demux", | |
803 | .data = &init_net.ipv4.sysctl_ip_early_demux, | |
804 | .maxlen = sizeof(int), | |
805 | .mode = 0644, | |
806 | .proc_handler = proc_dointvec | |
807 | }, | |
dddb64bc SAK |
808 | { |
809 | .procname = "udp_early_demux", | |
810 | .data = &init_net.ipv4.sysctl_udp_early_demux, | |
811 | .maxlen = sizeof(int), | |
812 | .mode = 0644, | |
813 | .proc_handler = proc_udp_early_demux | |
814 | }, | |
815 | { | |
816 | .procname = "tcp_early_demux", | |
817 | .data = &init_net.ipv4.sysctl_tcp_early_demux, | |
818 | .maxlen = sizeof(int), | |
819 | .mode = 0644, | |
820 | .proc_handler = proc_tcp_early_demux | |
821 | }, | |
fa50d974 NB |
822 | { |
823 | .procname = "ip_default_ttl", | |
824 | .data = &init_net.ipv4.sysctl_ip_default_ttl, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
827 | .proc_handler = proc_dointvec_minmax, | |
828 | .extra1 = &ip_ttl_min, | |
829 | .extra2 = &ip_ttl_max, | |
830 | }, | |
0bbf87d8 EB |
831 | { |
832 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
833 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
834 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
835 | .mode = 0644, |
836 | .proc_handler = ipv4_local_port_range, | |
837 | }, | |
122ff243 WC |
838 | { |
839 | .procname = "ip_local_reserved_ports", | |
840 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
841 | .maxlen = 65536, | |
842 | .mode = 0644, | |
843 | .proc_handler = proc_do_large_bitmap, | |
844 | }, | |
974eda11 HFS |
845 | { |
846 | .procname = "ip_no_pmtu_disc", | |
847 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
848 | .maxlen = sizeof(int), | |
849 | .mode = 0644, | |
850 | .proc_handler = proc_dointvec | |
851 | }, | |
f87c10a8 HFS |
852 | { |
853 | .procname = "ip_forward_use_pmtu", | |
854 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
855 | .maxlen = sizeof(int), | |
856 | .mode = 0644, | |
857 | .proc_handler = proc_dointvec, | |
858 | }, | |
49a60158 VB |
859 | { |
860 | .procname = "ip_nonlocal_bind", | |
861 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
862 | .maxlen = sizeof(int), | |
863 | .mode = 0644, | |
864 | .proc_handler = proc_dointvec | |
865 | }, | |
e110861f LC |
866 | { |
867 | .procname = "fwmark_reflect", | |
868 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
869 | .maxlen = sizeof(int), | |
870 | .mode = 0644, | |
871 | .proc_handler = proc_dointvec, | |
872 | }, | |
84f39b08 LC |
873 | { |
874 | .procname = "tcp_fwmark_accept", | |
875 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
876 | .maxlen = sizeof(int), | |
877 | .mode = 0644, | |
878 | .proc_handler = proc_dointvec, | |
879 | }, | |
6dd9a14e DA |
880 | #ifdef CONFIG_NET_L3_MASTER_DEV |
881 | { | |
882 | .procname = "tcp_l3mdev_accept", | |
883 | .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, | |
884 | .maxlen = sizeof(int), | |
885 | .mode = 0644, | |
886 | .proc_handler = proc_dointvec_minmax, | |
887 | .extra1 = &zero, | |
888 | .extra2 = &one, | |
889 | }, | |
890 | #endif | |
b0f9ca53 FD |
891 | { |
892 | .procname = "tcp_mtu_probing", | |
893 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
894 | .maxlen = sizeof(int), | |
895 | .mode = 0644, | |
896 | .proc_handler = proc_dointvec, | |
897 | }, | |
898 | { | |
899 | .procname = "tcp_base_mss", | |
900 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
901 | .maxlen = sizeof(int), | |
902 | .mode = 0644, | |
903 | .proc_handler = proc_dointvec, | |
904 | }, | |
6b58e0a5 FD |
905 | { |
906 | .procname = "tcp_probe_threshold", | |
907 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
908 | .maxlen = sizeof(int), | |
909 | .mode = 0644, | |
910 | .proc_handler = proc_dointvec, | |
911 | }, | |
05cbc0db FD |
912 | { |
913 | .procname = "tcp_probe_interval", | |
914 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
915 | .maxlen = sizeof(int), | |
916 | .mode = 0644, | |
917 | .proc_handler = proc_dointvec, | |
918 | }, | |
df2cf4a7 PD |
919 | { |
920 | .procname = "igmp_link_local_mcast_reports", | |
87a8a2ae | 921 | .data = &init_net.ipv4.sysctl_igmp_llm_reports, |
df2cf4a7 PD |
922 | .maxlen = sizeof(int), |
923 | .mode = 0644, | |
924 | .proc_handler = proc_dointvec | |
925 | }, | |
815c5270 NB |
926 | { |
927 | .procname = "igmp_max_memberships", | |
928 | .data = &init_net.ipv4.sysctl_igmp_max_memberships, | |
929 | .maxlen = sizeof(int), | |
930 | .mode = 0644, | |
931 | .proc_handler = proc_dointvec | |
932 | }, | |
166b6b2d NB |
933 | { |
934 | .procname = "igmp_max_msf", | |
935 | .data = &init_net.ipv4.sysctl_igmp_max_msf, | |
936 | .maxlen = sizeof(int), | |
937 | .mode = 0644, | |
938 | .proc_handler = proc_dointvec | |
939 | }, | |
165094af NB |
940 | #ifdef CONFIG_IP_MULTICAST |
941 | { | |
942 | .procname = "igmp_qrv", | |
943 | .data = &init_net.ipv4.sysctl_igmp_qrv, | |
944 | .maxlen = sizeof(int), | |
945 | .mode = 0644, | |
946 | .proc_handler = proc_dointvec_minmax, | |
947 | .extra1 = &one | |
948 | }, | |
949 | #endif | |
13b287e8 NB |
950 | { |
951 | .procname = "tcp_keepalive_time", | |
952 | .data = &init_net.ipv4.sysctl_tcp_keepalive_time, | |
953 | .maxlen = sizeof(int), | |
954 | .mode = 0644, | |
955 | .proc_handler = proc_dointvec_jiffies, | |
956 | }, | |
9bd6861b NB |
957 | { |
958 | .procname = "tcp_keepalive_probes", | |
959 | .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, | |
960 | .maxlen = sizeof(int), | |
961 | .mode = 0644, | |
962 | .proc_handler = proc_dointvec | |
963 | }, | |
b840d15d NB |
964 | { |
965 | .procname = "tcp_keepalive_intvl", | |
966 | .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, | |
967 | .maxlen = sizeof(int), | |
968 | .mode = 0644, | |
969 | .proc_handler = proc_dointvec_jiffies, | |
970 | }, | |
6fa25166 NB |
971 | { |
972 | .procname = "tcp_syn_retries", | |
973 | .data = &init_net.ipv4.sysctl_tcp_syn_retries, | |
974 | .maxlen = sizeof(int), | |
975 | .mode = 0644, | |
976 | .proc_handler = proc_dointvec_minmax, | |
977 | .extra1 = &tcp_syn_retries_min, | |
978 | .extra2 = &tcp_syn_retries_max | |
979 | }, | |
7c083ecb NB |
980 | { |
981 | .procname = "tcp_synack_retries", | |
982 | .data = &init_net.ipv4.sysctl_tcp_synack_retries, | |
983 | .maxlen = sizeof(int), | |
984 | .mode = 0644, | |
985 | .proc_handler = proc_dointvec | |
986 | }, | |
12ed8244 NB |
987 | #ifdef CONFIG_SYN_COOKIES |
988 | { | |
989 | .procname = "tcp_syncookies", | |
990 | .data = &init_net.ipv4.sysctl_tcp_syncookies, | |
991 | .maxlen = sizeof(int), | |
992 | .mode = 0644, | |
993 | .proc_handler = proc_dointvec | |
994 | }, | |
995 | #endif | |
1043e25f NB |
996 | { |
997 | .procname = "tcp_reordering", | |
998 | .data = &init_net.ipv4.sysctl_tcp_reordering, | |
999 | .maxlen = sizeof(int), | |
1000 | .mode = 0644, | |
1001 | .proc_handler = proc_dointvec | |
1002 | }, | |
ae5c3f40 NB |
1003 | { |
1004 | .procname = "tcp_retries1", | |
1005 | .data = &init_net.ipv4.sysctl_tcp_retries1, | |
1006 | .maxlen = sizeof(int), | |
1007 | .mode = 0644, | |
1008 | .proc_handler = proc_dointvec_minmax, | |
1009 | .extra2 = &tcp_retr1_max | |
1010 | }, | |
c6214a97 NB |
1011 | { |
1012 | .procname = "tcp_retries2", | |
1013 | .data = &init_net.ipv4.sysctl_tcp_retries2, | |
1014 | .maxlen = sizeof(int), | |
1015 | .mode = 0644, | |
1016 | .proc_handler = proc_dointvec | |
1017 | }, | |
c402d9be NB |
1018 | { |
1019 | .procname = "tcp_orphan_retries", | |
1020 | .data = &init_net.ipv4.sysctl_tcp_orphan_retries, | |
1021 | .maxlen = sizeof(int), | |
1022 | .mode = 0644, | |
1023 | .proc_handler = proc_dointvec | |
1024 | }, | |
1e579caa NB |
1025 | { |
1026 | .procname = "tcp_fin_timeout", | |
1027 | .data = &init_net.ipv4.sysctl_tcp_fin_timeout, | |
1028 | .maxlen = sizeof(int), | |
1029 | .mode = 0644, | |
1030 | .proc_handler = proc_dointvec_jiffies, | |
1031 | }, | |
4979f2d9 NB |
1032 | { |
1033 | .procname = "tcp_notsent_lowat", | |
1034 | .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, | |
1035 | .maxlen = sizeof(unsigned int), | |
1036 | .mode = 0644, | |
b007f090 | 1037 | .proc_handler = proc_douintvec, |
4979f2d9 | 1038 | }, |
56ab6b93 HY |
1039 | { |
1040 | .procname = "tcp_tw_reuse", | |
1041 | .data = &init_net.ipv4.sysctl_tcp_tw_reuse, | |
1042 | .maxlen = sizeof(int), | |
1043 | .mode = 0644, | |
1044 | .proc_handler = proc_dointvec | |
1045 | }, | |
1946e672 HY |
1046 | { |
1047 | .procname = "tcp_max_tw_buckets", | |
1048 | .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, | |
1049 | .maxlen = sizeof(int), | |
1050 | .mode = 0644, | |
1051 | .proc_handler = proc_dointvec | |
1052 | }, | |
fee83d09 HY |
1053 | { |
1054 | .procname = "tcp_max_syn_backlog", | |
1055 | .data = &init_net.ipv4.sysctl_max_syn_backlog, | |
1056 | .maxlen = sizeof(int), | |
1057 | .mode = 0644, | |
1058 | .proc_handler = proc_dointvec | |
1059 | }, | |
a6db4494 DA |
1060 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
1061 | { | |
1062 | .procname = "fib_multipath_use_neigh", | |
1063 | .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, | |
1064 | .maxlen = sizeof(int), | |
1065 | .mode = 0644, | |
1066 | .proc_handler = proc_dointvec_minmax, | |
bf4e0a3d NA |
1067 | .extra1 = &zero, |
1068 | .extra2 = &one, | |
1069 | }, | |
1070 | { | |
1071 | .procname = "fib_multipath_hash_policy", | |
1072 | .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy, | |
1073 | .maxlen = sizeof(int), | |
1074 | .mode = 0644, | |
1075 | .proc_handler = proc_dointvec_minmax, | |
a6db4494 DA |
1076 | .extra1 = &zero, |
1077 | .extra2 = &one, | |
1078 | }, | |
1079 | #endif | |
4548b683 KJ |
1080 | { |
1081 | .procname = "ip_unprivileged_port_start", | |
1082 | .maxlen = sizeof(int), | |
1083 | .data = &init_net.ipv4.sysctl_ip_prot_sock, | |
1084 | .mode = 0644, | |
1085 | .proc_handler = ipv4_privileged_ports, | |
1086 | }, | |
63a6fff3 RS |
1087 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1088 | { | |
1089 | .procname = "udp_l3mdev_accept", | |
1090 | .data = &init_net.ipv4.sysctl_udp_l3mdev_accept, | |
1091 | .maxlen = sizeof(int), | |
1092 | .mode = 0644, | |
1093 | .proc_handler = proc_dointvec_minmax, | |
1094 | .extra1 = &zero, | |
1095 | .extra2 = &one, | |
1096 | }, | |
1097 | #endif | |
68528f09 PE |
1098 | { } |
1099 | }; | |
1100 | ||
1577519d PE |
1101 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
1102 | { | |
68528f09 PE |
1103 | struct ctl_table *table; |
1104 | ||
1105 | table = ipv4_net_table; | |
09ad9bc7 | 1106 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
1107 | int i; |
1108 | ||
68528f09 | 1109 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
51456b29 | 1110 | if (!table) |
68528f09 PE |
1111 | goto err_alloc; |
1112 | ||
0a6fa23d EB |
1113 | /* Update the variables to point into the current struct net */ |
1114 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
1115 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
1116 | } |
1117 | ||
ec8f23ce | 1118 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
51456b29 | 1119 | if (!net->ipv4.ipv4_hdr) |
68528f09 PE |
1120 | goto err_reg; |
1121 | ||
122ff243 WC |
1122 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
1123 | if (!net->ipv4.sysctl_local_reserved_ports) | |
1124 | goto err_ports; | |
1125 | ||
1577519d | 1126 | return 0; |
68528f09 | 1127 | |
122ff243 WC |
1128 | err_ports: |
1129 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 1130 | err_reg: |
09ad9bc7 | 1131 | if (!net_eq(net, &init_net)) |
68528f09 PE |
1132 | kfree(table); |
1133 | err_alloc: | |
1134 | return -ENOMEM; | |
1577519d PE |
1135 | } |
1136 | ||
1137 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
1138 | { | |
68528f09 PE |
1139 | struct ctl_table *table; |
1140 | ||
122ff243 | 1141 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
1142 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
1143 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
1144 | kfree(table); | |
1577519d PE |
1145 | } |
1146 | ||
1147 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
1148 | .init = ipv4_sysctl_init_net, | |
1149 | .exit = ipv4_sysctl_exit_net, | |
1150 | }; | |
1151 | ||
3e37c3f9 PE |
1152 | static __init int sysctl_ipv4_init(void) |
1153 | { | |
1154 | struct ctl_table_header *hdr; | |
1155 | ||
ec8f23ce | 1156 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
51456b29 | 1157 | if (!hdr) |
1577519d PE |
1158 | return -ENOMEM; |
1159 | ||
1160 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 1161 | unregister_net_sysctl_table(hdr); |
1577519d PE |
1162 | return -ENOMEM; |
1163 | } | |
1164 | ||
1165 | return 0; | |
3e37c3f9 PE |
1166 | } |
1167 | ||
1168 | __initcall(sysctl_ipv4_init); |