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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 | |
b6690b14 FW |
48 | /* obsolete */ |
49 | static int sysctl_tcp_low_latency __read_mostly; | |
50 | ||
227b60f5 | 51 | /* Update system visible IP port range */ |
0bbf87d8 | 52 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 53 | { |
ed2dfd90 ED |
54 | bool same_parity = !((range[0] ^ range[1]) & 1); |
55 | ||
4ee3bd4a | 56 | write_seqlock_bh(&net->ipv4.ip_local_ports.lock); |
ed2dfd90 ED |
57 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
58 | net->ipv4.ip_local_ports.warned = true; | |
59 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); | |
60 | } | |
c9d8f1a6 CW |
61 | net->ipv4.ip_local_ports.range[0] = range[0]; |
62 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
4ee3bd4a | 63 | write_sequnlock_bh(&net->ipv4.ip_local_ports.lock); |
227b60f5 SH |
64 | } |
65 | ||
66 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 67 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
68 | void __user *buffer, |
69 | size_t *lenp, loff_t *ppos) | |
70 | { | |
0bbf87d8 | 71 | struct net *net = |
c9d8f1a6 | 72 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 73 | int ret; |
3c689b73 | 74 | int range[2]; |
fe2c6338 | 75 | struct ctl_table tmp = { |
227b60f5 SH |
76 | .data = &range, |
77 | .maxlen = sizeof(range), | |
78 | .mode = table->mode, | |
79 | .extra1 = &ip_local_port_range_min, | |
80 | .extra2 = &ip_local_port_range_max, | |
81 | }; | |
82 | ||
0bbf87d8 EB |
83 | inet_get_local_port_range(net, &range[0], &range[1]); |
84 | ||
8d65af78 | 85 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
86 | |
87 | if (write && ret == 0) { | |
4548b683 KJ |
88 | /* Ensure that the upper limit is not smaller than the lower, |
89 | * and that the lower does not encroach upon the privileged | |
90 | * port limit. | |
91 | */ | |
92 | if ((range[1] < range[0]) || | |
93 | (range[0] < net->ipv4.sysctl_ip_prot_sock)) | |
227b60f5 SH |
94 | ret = -EINVAL; |
95 | else | |
0bbf87d8 | 96 | set_local_port_range(net, range); |
227b60f5 SH |
97 | } |
98 | ||
99 | return ret; | |
100 | } | |
101 | ||
4548b683 KJ |
102 | /* Validate changes from /proc interface. */ |
103 | static int ipv4_privileged_ports(struct ctl_table *table, int write, | |
104 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
105 | { | |
106 | struct net *net = container_of(table->data, struct net, | |
107 | ipv4.sysctl_ip_prot_sock); | |
108 | int ret; | |
109 | int pports; | |
110 | int range[2]; | |
111 | struct ctl_table tmp = { | |
112 | .data = &pports, | |
113 | .maxlen = sizeof(pports), | |
114 | .mode = table->mode, | |
115 | .extra1 = &ip_privileged_port_min, | |
116 | .extra2 = &ip_privileged_port_max, | |
117 | }; | |
118 | ||
119 | pports = net->ipv4.sysctl_ip_prot_sock; | |
120 | ||
121 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
122 | ||
123 | if (write && ret == 0) { | |
124 | inet_get_local_port_range(net, &range[0], &range[1]); | |
125 | /* Ensure that the local port range doesn't overlap with the | |
126 | * privileged port range. | |
127 | */ | |
128 | if (range[0] < pports) | |
129 | ret = -EINVAL; | |
130 | else | |
131 | net->ipv4.sysctl_ip_prot_sock = pports; | |
132 | } | |
133 | ||
134 | return ret; | |
135 | } | |
c319b4d7 | 136 | |
7064d16e | 137 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 138 | { |
7064d16e | 139 | kgid_t *data = table->data; |
0bbf87d8 | 140 | struct net *net = |
ba6b918a | 141 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 142 | unsigned int seq; |
c319b4d7 | 143 | do { |
396a30cc | 144 | seq = read_seqbegin(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
145 | |
146 | *low = data[0]; | |
147 | *high = data[1]; | |
396a30cc | 148 | } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq)); |
c319b4d7 VK |
149 | } |
150 | ||
151 | /* Update system visible IP port range */ | |
7064d16e | 152 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 153 | { |
7064d16e | 154 | kgid_t *data = table->data; |
0bbf87d8 | 155 | struct net *net = |
ba6b918a | 156 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
396a30cc | 157 | write_seqlock(&net->ipv4.ping_group_range.lock); |
7064d16e EB |
158 | data[0] = low; |
159 | data[1] = high; | |
396a30cc | 160 | write_sequnlock(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
161 | } |
162 | ||
163 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 164 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
165 | void __user *buffer, |
166 | size_t *lenp, loff_t *ppos) | |
167 | { | |
7064d16e | 168 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 169 | int ret; |
7064d16e EB |
170 | gid_t urange[2]; |
171 | kgid_t low, high; | |
fe2c6338 | 172 | struct ctl_table tmp = { |
7064d16e EB |
173 | .data = &urange, |
174 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
175 | .mode = table->mode, |
176 | .extra1 = &ip_ping_group_range_min, | |
177 | .extra2 = &ip_ping_group_range_max, | |
178 | }; | |
179 | ||
7064d16e EB |
180 | inet_get_ping_group_range_table(table, &low, &high); |
181 | urange[0] = from_kgid_munged(user_ns, low); | |
182 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
183 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
184 | ||
7064d16e EB |
185 | if (write && ret == 0) { |
186 | low = make_kgid(user_ns, urange[0]); | |
187 | high = make_kgid(user_ns, urange[1]); | |
188 | if (!gid_valid(low) || !gid_valid(high) || | |
189 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
190 | low = make_kgid(&init_user_ns, 1); | |
191 | high = make_kgid(&init_user_ns, 0); | |
192 | } | |
193 | set_ping_group_range(table, low, high); | |
194 | } | |
c319b4d7 VK |
195 | |
196 | return ret; | |
197 | } | |
198 | ||
fe2c6338 | 199 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
200 | void __user *buffer, size_t *lenp, loff_t *ppos) |
201 | { | |
202 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 203 | struct ctl_table tbl = { |
317a76f9 SH |
204 | .data = val, |
205 | .maxlen = TCP_CA_NAME_MAX, | |
206 | }; | |
207 | int ret; | |
208 | ||
209 | tcp_get_default_congestion_control(val); | |
210 | ||
8d65af78 | 211 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
212 | if (write && ret == 0) |
213 | ret = tcp_set_default_congestion_control(val); | |
214 | return ret; | |
215 | } | |
216 | ||
fe2c6338 | 217 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 218 | int write, |
3ff825b2 SH |
219 | void __user *buffer, size_t *lenp, |
220 | loff_t *ppos) | |
221 | { | |
fe2c6338 | 222 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
223 | int ret; |
224 | ||
225 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
226 | if (!tbl.data) | |
227 | return -ENOMEM; | |
228 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 229 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
230 | kfree(tbl.data); |
231 | return ret; | |
232 | } | |
233 | ||
fe2c6338 | 234 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 235 | int write, |
ce7bc3bf SH |
236 | void __user *buffer, size_t *lenp, |
237 | loff_t *ppos) | |
238 | { | |
fe2c6338 | 239 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
240 | int ret; |
241 | ||
242 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
243 | if (!tbl.data) | |
244 | return -ENOMEM; | |
245 | ||
246 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 247 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
248 | if (write && ret == 0) |
249 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
250 | kfree(tbl.data); | |
251 | return ret; | |
252 | } | |
253 | ||
43713848 | 254 | static int proc_tcp_fastopen_key(struct ctl_table *table, int write, |
fe2c6338 JP |
255 | void __user *buffer, size_t *lenp, |
256 | loff_t *ppos) | |
10467163 | 257 | { |
43713848 HY |
258 | struct net *net = container_of(table->data, struct net, |
259 | ipv4.sysctl_tcp_fastopen); | |
fe2c6338 | 260 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
261 | struct tcp_fastopen_context *ctxt; |
262 | int ret; | |
263 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
264 | ||
265 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
266 | if (!tbl.data) | |
267 | return -ENOMEM; | |
268 | ||
269 | rcu_read_lock(); | |
43713848 | 270 | ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx); |
10467163 JC |
271 | if (ctxt) |
272 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
273 | else |
274 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
275 | rcu_read_unlock(); |
276 | ||
277 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
278 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
279 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
280 | ||
281 | if (write && ret == 0) { | |
282 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
283 | user_key + 2, user_key + 3) != 4) { | |
284 | ret = -EINVAL; | |
285 | goto bad_key; | |
286 | } | |
43713848 | 287 | tcp_fastopen_reset_cipher(net, user_key, TCP_FASTOPEN_KEY_LENGTH); |
10467163 JC |
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 | ||
cf1ef3f0 WW |
353 | static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table, |
354 | int write, | |
355 | void __user *buffer, | |
356 | size_t *lenp, loff_t *ppos) | |
357 | { | |
358 | int ret; | |
359 | ||
360 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
361 | if (write && ret == 0) | |
362 | tcp_fastopen_active_timeout_reset(); | |
734942cc DW |
363 | |
364 | return ret; | |
365 | } | |
366 | ||
367 | static int proc_tcp_available_ulp(struct ctl_table *ctl, | |
368 | int write, | |
369 | void __user *buffer, size_t *lenp, | |
370 | loff_t *ppos) | |
371 | { | |
372 | struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, }; | |
373 | int ret; | |
374 | ||
375 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
376 | if (!tbl.data) | |
377 | return -ENOMEM; | |
378 | tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX); | |
379 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
380 | kfree(tbl.data); | |
381 | ||
cf1ef3f0 WW |
382 | return ret; |
383 | } | |
384 | ||
3e37c3f9 | 385 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 386 | { |
1da177e4 LT |
387 | .procname = "tcp_retrans_collapse", |
388 | .data = &sysctl_tcp_retrans_collapse, | |
389 | .maxlen = sizeof(int), | |
390 | .mode = 0644, | |
6d9f239a | 391 | .proc_handler = proc_dointvec |
1da177e4 | 392 | }, |
1da177e4 | 393 | { |
1da177e4 LT |
394 | .procname = "tcp_max_orphans", |
395 | .data = &sysctl_tcp_max_orphans, | |
396 | .maxlen = sizeof(int), | |
397 | .mode = 0644, | |
6d9f239a | 398 | .proc_handler = proc_dointvec |
1da177e4 | 399 | }, |
cf1ef3f0 WW |
400 | { |
401 | .procname = "tcp_fastopen_blackhole_timeout_sec", | |
402 | .data = &sysctl_tcp_fastopen_blackhole_timeout, | |
403 | .maxlen = sizeof(int), | |
404 | .mode = 0644, | |
405 | .proc_handler = proc_tfo_blackhole_detect_timeout, | |
406 | .extra1 = &zero, | |
407 | }, | |
1da177e4 | 408 | { |
1da177e4 LT |
409 | .procname = "tcp_abort_on_overflow", |
410 | .data = &sysctl_tcp_abort_on_overflow, | |
411 | .maxlen = sizeof(int), | |
412 | .mode = 0644, | |
6d9f239a | 413 | .proc_handler = proc_dointvec |
1da177e4 LT |
414 | }, |
415 | { | |
1da177e4 LT |
416 | .procname = "tcp_stdurg", |
417 | .data = &sysctl_tcp_stdurg, | |
418 | .maxlen = sizeof(int), | |
419 | .mode = 0644, | |
6d9f239a | 420 | .proc_handler = proc_dointvec |
1da177e4 LT |
421 | }, |
422 | { | |
1da177e4 LT |
423 | .procname = "tcp_rfc1337", |
424 | .data = &sysctl_tcp_rfc1337, | |
425 | .maxlen = sizeof(int), | |
426 | .mode = 0644, | |
6d9f239a | 427 | .proc_handler = proc_dointvec |
1da177e4 | 428 | }, |
1da177e4 | 429 | { |
1da177e4 LT |
430 | .procname = "inet_peer_threshold", |
431 | .data = &inet_peer_threshold, | |
432 | .maxlen = sizeof(int), | |
433 | .mode = 0644, | |
6d9f239a | 434 | .proc_handler = proc_dointvec |
1da177e4 LT |
435 | }, |
436 | { | |
1da177e4 LT |
437 | .procname = "inet_peer_minttl", |
438 | .data = &inet_peer_minttl, | |
439 | .maxlen = sizeof(int), | |
440 | .mode = 0644, | |
6d9f239a | 441 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
442 | }, |
443 | { | |
1da177e4 LT |
444 | .procname = "inet_peer_maxttl", |
445 | .data = &inet_peer_maxttl, | |
446 | .maxlen = sizeof(int), | |
447 | .mode = 0644, | |
6d9f239a | 448 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 449 | }, |
1da177e4 | 450 | { |
1da177e4 LT |
451 | .procname = "tcp_fack", |
452 | .data = &sysctl_tcp_fack, | |
453 | .maxlen = sizeof(int), | |
454 | .mode = 0644, | |
6d9f239a | 455 | .proc_handler = proc_dointvec |
1da177e4 | 456 | }, |
4f41b1c5 YC |
457 | { |
458 | .procname = "tcp_recovery", | |
459 | .data = &sysctl_tcp_recovery, | |
460 | .maxlen = sizeof(int), | |
461 | .mode = 0644, | |
462 | .proc_handler = proc_dointvec, | |
463 | }, | |
dca145ff ED |
464 | { |
465 | .procname = "tcp_max_reordering", | |
466 | .data = &sysctl_tcp_max_reordering, | |
467 | .maxlen = sizeof(int), | |
468 | .mode = 0644, | |
469 | .proc_handler = proc_dointvec | |
470 | }, | |
1da177e4 | 471 | { |
1da177e4 LT |
472 | .procname = "tcp_dsack", |
473 | .data = &sysctl_tcp_dsack, | |
474 | .maxlen = sizeof(int), | |
475 | .mode = 0644, | |
6d9f239a | 476 | .proc_handler = proc_dointvec |
1da177e4 | 477 | }, |
a4fe34bf EB |
478 | { |
479 | .procname = "tcp_mem", | |
480 | .maxlen = sizeof(sysctl_tcp_mem), | |
481 | .data = &sysctl_tcp_mem, | |
482 | .mode = 0644, | |
483 | .proc_handler = proc_doulongvec_minmax, | |
484 | }, | |
1da177e4 | 485 | { |
1da177e4 LT |
486 | .procname = "tcp_wmem", |
487 | .data = &sysctl_tcp_wmem, | |
488 | .maxlen = sizeof(sysctl_tcp_wmem), | |
489 | .mode = 0644, | |
cdda8891 | 490 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 491 | .extra1 = &one, |
1da177e4 LT |
492 | }, |
493 | { | |
1da177e4 LT |
494 | .procname = "tcp_rmem", |
495 | .data = &sysctl_tcp_rmem, | |
496 | .maxlen = sizeof(sysctl_tcp_rmem), | |
497 | .mode = 0644, | |
cdda8891 | 498 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 499 | .extra1 = &one, |
1da177e4 LT |
500 | }, |
501 | { | |
1da177e4 LT |
502 | .procname = "tcp_app_win", |
503 | .data = &sysctl_tcp_app_win, | |
504 | .maxlen = sizeof(int), | |
505 | .mode = 0644, | |
6d9f239a | 506 | .proc_handler = proc_dointvec |
1da177e4 LT |
507 | }, |
508 | { | |
1da177e4 LT |
509 | .procname = "tcp_adv_win_scale", |
510 | .data = &sysctl_tcp_adv_win_scale, | |
511 | .maxlen = sizeof(int), | |
512 | .mode = 0644, | |
0147fc05 AD |
513 | .proc_handler = proc_dointvec_minmax, |
514 | .extra1 = &tcp_adv_win_scale_min, | |
515 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 516 | }, |
1da177e4 | 517 | { |
1da177e4 LT |
518 | .procname = "tcp_frto", |
519 | .data = &sysctl_tcp_frto, | |
520 | .maxlen = sizeof(int), | |
f6722583 YC |
521 | .mode = 0644, |
522 | .proc_handler = proc_dointvec | |
523 | }, | |
524 | { | |
525 | .procname = "tcp_min_rtt_wlen", | |
526 | .data = &sysctl_tcp_min_rtt_wlen, | |
527 | .maxlen = sizeof(int), | |
1da177e4 | 528 | .mode = 0644, |
6d9f239a | 529 | .proc_handler = proc_dointvec |
1da177e4 LT |
530 | }, |
531 | { | |
1da177e4 LT |
532 | .procname = "tcp_low_latency", |
533 | .data = &sysctl_tcp_low_latency, | |
534 | .maxlen = sizeof(int), | |
535 | .mode = 0644, | |
6d9f239a | 536 | .proc_handler = proc_dointvec |
1da177e4 | 537 | }, |
1da177e4 | 538 | { |
1da177e4 LT |
539 | .procname = "tcp_no_metrics_save", |
540 | .data = &sysctl_tcp_nometrics_save, | |
541 | .maxlen = sizeof(int), | |
542 | .mode = 0644, | |
6d9f239a | 543 | .proc_handler = proc_dointvec, |
1da177e4 | 544 | }, |
1da177e4 | 545 | { |
1da177e4 LT |
546 | .procname = "tcp_moderate_rcvbuf", |
547 | .data = &sysctl_tcp_moderate_rcvbuf, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
6d9f239a | 550 | .proc_handler = proc_dointvec, |
1da177e4 LT |
551 | }, |
552 | { | |
1da177e4 LT |
553 | .procname = "tcp_tso_win_divisor", |
554 | .data = &sysctl_tcp_tso_win_divisor, | |
555 | .maxlen = sizeof(int), | |
556 | .mode = 0644, | |
6d9f239a | 557 | .proc_handler = proc_dointvec, |
1da177e4 LT |
558 | }, |
559 | { | |
317a76f9 | 560 | .procname = "tcp_congestion_control", |
1da177e4 | 561 | .mode = 0644, |
317a76f9 | 562 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 563 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 564 | }, |
e905a9ed | 565 | { |
15d99e02 RJ |
566 | .procname = "tcp_workaround_signed_windows", |
567 | .data = &sysctl_tcp_workaround_signed_windows, | |
568 | .maxlen = sizeof(int), | |
569 | .mode = 0644, | |
6d9f239a | 570 | .proc_handler = proc_dointvec |
15d99e02 | 571 | }, |
46d3ceab ED |
572 | { |
573 | .procname = "tcp_limit_output_bytes", | |
574 | .data = &sysctl_tcp_limit_output_bytes, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
577 | .proc_handler = proc_dointvec | |
578 | }, | |
282f23c6 ED |
579 | { |
580 | .procname = "tcp_challenge_ack_limit", | |
581 | .data = &sysctl_tcp_challenge_ack_limit, | |
582 | .maxlen = sizeof(int), | |
583 | .mode = 0644, | |
584 | .proc_handler = proc_dointvec | |
585 | }, | |
35089bb2 | 586 | { |
35089bb2 DM |
587 | .procname = "tcp_slow_start_after_idle", |
588 | .data = &sysctl_tcp_slow_start_after_idle, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d9f239a | 591 | .proc_handler = proc_dointvec |
35089bb2 | 592 | }, |
446fda4f PM |
593 | #ifdef CONFIG_NETLABEL |
594 | { | |
446fda4f PM |
595 | .procname = "cipso_cache_enable", |
596 | .data = &cipso_v4_cache_enabled, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
6d9f239a | 599 | .proc_handler = proc_dointvec, |
446fda4f PM |
600 | }, |
601 | { | |
446fda4f PM |
602 | .procname = "cipso_cache_bucket_size", |
603 | .data = &cipso_v4_cache_bucketsize, | |
604 | .maxlen = sizeof(int), | |
605 | .mode = 0644, | |
6d9f239a | 606 | .proc_handler = proc_dointvec, |
446fda4f PM |
607 | }, |
608 | { | |
446fda4f PM |
609 | .procname = "cipso_rbm_optfmt", |
610 | .data = &cipso_v4_rbm_optfmt, | |
611 | .maxlen = sizeof(int), | |
612 | .mode = 0644, | |
6d9f239a | 613 | .proc_handler = proc_dointvec, |
446fda4f PM |
614 | }, |
615 | { | |
446fda4f PM |
616 | .procname = "cipso_rbm_strictvalid", |
617 | .data = &cipso_v4_rbm_strictvalid, | |
618 | .maxlen = sizeof(int), | |
619 | .mode = 0644, | |
6d9f239a | 620 | .proc_handler = proc_dointvec, |
446fda4f PM |
621 | }, |
622 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 623 | { |
3ff825b2 SH |
624 | .procname = "tcp_available_congestion_control", |
625 | .maxlen = TCP_CA_BUF_MAX, | |
626 | .mode = 0444, | |
6d9f239a | 627 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 628 | }, |
ce7bc3bf | 629 | { |
ce7bc3bf SH |
630 | .procname = "tcp_allowed_congestion_control", |
631 | .maxlen = TCP_CA_BUF_MAX, | |
632 | .mode = 0644, | |
6d9f239a | 633 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 634 | }, |
36e31b0a AP |
635 | { |
636 | .procname = "tcp_thin_linear_timeouts", | |
637 | .data = &sysctl_tcp_thin_linear_timeouts, | |
638 | .maxlen = sizeof(int), | |
639 | .mode = 0644, | |
640 | .proc_handler = proc_dointvec | |
641 | }, | |
eed530b6 YC |
642 | { |
643 | .procname = "tcp_early_retrans", | |
644 | .data = &sysctl_tcp_early_retrans, | |
645 | .maxlen = sizeof(int), | |
646 | .mode = 0644, | |
647 | .proc_handler = proc_dointvec_minmax, | |
648 | .extra1 = &zero, | |
6ba8a3b1 | 649 | .extra2 = &four, |
eed530b6 | 650 | }, |
95bd09eb ED |
651 | { |
652 | .procname = "tcp_min_tso_segs", | |
653 | .data = &sysctl_tcp_min_tso_segs, | |
654 | .maxlen = sizeof(int), | |
655 | .mode = 0644, | |
656 | .proc_handler = proc_dointvec_minmax, | |
d6a4e26a | 657 | .extra1 = &one, |
95bd09eb ED |
658 | .extra2 = &gso_max_segs, |
659 | }, | |
43e122b0 ED |
660 | { |
661 | .procname = "tcp_pacing_ss_ratio", | |
662 | .data = &sysctl_tcp_pacing_ss_ratio, | |
663 | .maxlen = sizeof(int), | |
664 | .mode = 0644, | |
665 | .proc_handler = proc_dointvec_minmax, | |
666 | .extra1 = &zero, | |
667 | .extra2 = &thousand, | |
668 | }, | |
669 | { | |
670 | .procname = "tcp_pacing_ca_ratio", | |
671 | .data = &sysctl_tcp_pacing_ca_ratio, | |
672 | .maxlen = sizeof(int), | |
673 | .mode = 0644, | |
674 | .proc_handler = proc_dointvec_minmax, | |
675 | .extra1 = &zero, | |
676 | .extra2 = &thousand, | |
677 | }, | |
f54b3111 ED |
678 | { |
679 | .procname = "tcp_autocorking", | |
680 | .data = &sysctl_tcp_autocorking, | |
681 | .maxlen = sizeof(int), | |
682 | .mode = 0644, | |
683 | .proc_handler = proc_dointvec_minmax, | |
684 | .extra1 = &zero, | |
685 | .extra2 = &one, | |
686 | }, | |
032ee423 NC |
687 | { |
688 | .procname = "tcp_invalid_ratelimit", | |
689 | .data = &sysctl_tcp_invalid_ratelimit, | |
690 | .maxlen = sizeof(int), | |
691 | .mode = 0644, | |
692 | .proc_handler = proc_dointvec_ms_jiffies, | |
693 | }, | |
734942cc DW |
694 | { |
695 | .procname = "tcp_available_ulp", | |
696 | .maxlen = TCP_ULP_BUF_MAX, | |
697 | .mode = 0444, | |
698 | .proc_handler = proc_tcp_available_ulp, | |
699 | }, | |
4cdf507d ED |
700 | { |
701 | .procname = "icmp_msgs_per_sec", | |
702 | .data = &sysctl_icmp_msgs_per_sec, | |
703 | .maxlen = sizeof(int), | |
704 | .mode = 0644, | |
705 | .proc_handler = proc_dointvec_minmax, | |
706 | .extra1 = &zero, | |
707 | }, | |
708 | { | |
709 | .procname = "icmp_msgs_burst", | |
710 | .data = &sysctl_icmp_msgs_burst, | |
711 | .maxlen = sizeof(int), | |
712 | .mode = 0644, | |
713 | .proc_handler = proc_dointvec_minmax, | |
714 | .extra1 = &zero, | |
715 | }, | |
95766fff | 716 | { |
95766fff HA |
717 | .procname = "udp_mem", |
718 | .data = &sysctl_udp_mem, | |
719 | .maxlen = sizeof(sysctl_udp_mem), | |
720 | .mode = 0644, | |
8d987e5c | 721 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
722 | }, |
723 | { | |
95766fff HA |
724 | .procname = "udp_rmem_min", |
725 | .data = &sysctl_udp_rmem_min, | |
726 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
727 | .mode = 0644, | |
6d9f239a | 728 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 729 | .extra1 = &one |
95766fff HA |
730 | }, |
731 | { | |
95766fff HA |
732 | .procname = "udp_wmem_min", |
733 | .data = &sysctl_udp_wmem_min, | |
734 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
735 | .mode = 0644, | |
6d9f239a | 736 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 737 | .extra1 = &one |
95766fff | 738 | }, |
f8572d8f | 739 | { } |
1da177e4 | 740 | }; |
3e37c3f9 | 741 | |
68528f09 PE |
742 | static struct ctl_table ipv4_net_table[] = { |
743 | { | |
68528f09 PE |
744 | .procname = "icmp_echo_ignore_all", |
745 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
746 | .maxlen = sizeof(int), | |
747 | .mode = 0644, | |
6d9f239a | 748 | .proc_handler = proc_dointvec |
68528f09 PE |
749 | }, |
750 | { | |
68528f09 PE |
751 | .procname = "icmp_echo_ignore_broadcasts", |
752 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
753 | .maxlen = sizeof(int), | |
754 | .mode = 0644, | |
6d9f239a | 755 | .proc_handler = proc_dointvec |
68528f09 PE |
756 | }, |
757 | { | |
68528f09 PE |
758 | .procname = "icmp_ignore_bogus_error_responses", |
759 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
760 | .maxlen = sizeof(int), | |
761 | .mode = 0644, | |
6d9f239a | 762 | .proc_handler = proc_dointvec |
68528f09 PE |
763 | }, |
764 | { | |
68528f09 PE |
765 | .procname = "icmp_errors_use_inbound_ifaddr", |
766 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
767 | .maxlen = sizeof(int), | |
768 | .mode = 0644, | |
6d9f239a | 769 | .proc_handler = proc_dointvec |
68528f09 PE |
770 | }, |
771 | { | |
68528f09 PE |
772 | .procname = "icmp_ratelimit", |
773 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
774 | .maxlen = sizeof(int), | |
775 | .mode = 0644, | |
6d9f239a | 776 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
777 | }, |
778 | { | |
68528f09 PE |
779 | .procname = "icmp_ratemask", |
780 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
781 | .maxlen = sizeof(int), | |
782 | .mode = 0644, | |
6d9f239a | 783 | .proc_handler = proc_dointvec |
68528f09 | 784 | }, |
c319b4d7 VK |
785 | { |
786 | .procname = "ping_group_range", | |
ba6b918a | 787 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 788 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
789 | .mode = 0644, |
790 | .proc_handler = ipv4_ping_group_range, | |
791 | }, | |
5d134f1c HFS |
792 | { |
793 | .procname = "tcp_ecn", | |
794 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
795 | .maxlen = sizeof(int), | |
796 | .mode = 0644, | |
797 | .proc_handler = proc_dointvec | |
798 | }, | |
49213555 DB |
799 | { |
800 | .procname = "tcp_ecn_fallback", | |
801 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
802 | .maxlen = sizeof(int), | |
803 | .mode = 0644, | |
804 | .proc_handler = proc_dointvec | |
805 | }, | |
287b7f38 NB |
806 | { |
807 | .procname = "ip_dynaddr", | |
808 | .data = &init_net.ipv4.sysctl_ip_dynaddr, | |
809 | .maxlen = sizeof(int), | |
810 | .mode = 0644, | |
811 | .proc_handler = proc_dointvec | |
812 | }, | |
e21145a9 NB |
813 | { |
814 | .procname = "ip_early_demux", | |
815 | .data = &init_net.ipv4.sysctl_ip_early_demux, | |
816 | .maxlen = sizeof(int), | |
817 | .mode = 0644, | |
818 | .proc_handler = proc_dointvec | |
819 | }, | |
dddb64bc SAK |
820 | { |
821 | .procname = "udp_early_demux", | |
822 | .data = &init_net.ipv4.sysctl_udp_early_demux, | |
823 | .maxlen = sizeof(int), | |
824 | .mode = 0644, | |
825 | .proc_handler = proc_udp_early_demux | |
826 | }, | |
827 | { | |
828 | .procname = "tcp_early_demux", | |
829 | .data = &init_net.ipv4.sysctl_tcp_early_demux, | |
830 | .maxlen = sizeof(int), | |
831 | .mode = 0644, | |
832 | .proc_handler = proc_tcp_early_demux | |
833 | }, | |
fa50d974 NB |
834 | { |
835 | .procname = "ip_default_ttl", | |
836 | .data = &init_net.ipv4.sysctl_ip_default_ttl, | |
837 | .maxlen = sizeof(int), | |
838 | .mode = 0644, | |
839 | .proc_handler = proc_dointvec_minmax, | |
840 | .extra1 = &ip_ttl_min, | |
841 | .extra2 = &ip_ttl_max, | |
842 | }, | |
0bbf87d8 EB |
843 | { |
844 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
845 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
846 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
847 | .mode = 0644, |
848 | .proc_handler = ipv4_local_port_range, | |
849 | }, | |
122ff243 WC |
850 | { |
851 | .procname = "ip_local_reserved_ports", | |
852 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
853 | .maxlen = 65536, | |
854 | .mode = 0644, | |
855 | .proc_handler = proc_do_large_bitmap, | |
856 | }, | |
974eda11 HFS |
857 | { |
858 | .procname = "ip_no_pmtu_disc", | |
859 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
860 | .maxlen = sizeof(int), | |
861 | .mode = 0644, | |
862 | .proc_handler = proc_dointvec | |
863 | }, | |
f87c10a8 HFS |
864 | { |
865 | .procname = "ip_forward_use_pmtu", | |
866 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
867 | .maxlen = sizeof(int), | |
868 | .mode = 0644, | |
869 | .proc_handler = proc_dointvec, | |
870 | }, | |
49a60158 VB |
871 | { |
872 | .procname = "ip_nonlocal_bind", | |
873 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
874 | .maxlen = sizeof(int), | |
875 | .mode = 0644, | |
876 | .proc_handler = proc_dointvec | |
877 | }, | |
e110861f LC |
878 | { |
879 | .procname = "fwmark_reflect", | |
880 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
881 | .maxlen = sizeof(int), | |
882 | .mode = 0644, | |
883 | .proc_handler = proc_dointvec, | |
884 | }, | |
84f39b08 LC |
885 | { |
886 | .procname = "tcp_fwmark_accept", | |
887 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
888 | .maxlen = sizeof(int), | |
889 | .mode = 0644, | |
890 | .proc_handler = proc_dointvec, | |
891 | }, | |
6dd9a14e DA |
892 | #ifdef CONFIG_NET_L3_MASTER_DEV |
893 | { | |
894 | .procname = "tcp_l3mdev_accept", | |
895 | .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, | |
896 | .maxlen = sizeof(int), | |
897 | .mode = 0644, | |
898 | .proc_handler = proc_dointvec_minmax, | |
899 | .extra1 = &zero, | |
900 | .extra2 = &one, | |
901 | }, | |
902 | #endif | |
b0f9ca53 FD |
903 | { |
904 | .procname = "tcp_mtu_probing", | |
905 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
906 | .maxlen = sizeof(int), | |
907 | .mode = 0644, | |
908 | .proc_handler = proc_dointvec, | |
909 | }, | |
910 | { | |
911 | .procname = "tcp_base_mss", | |
912 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
913 | .maxlen = sizeof(int), | |
914 | .mode = 0644, | |
915 | .proc_handler = proc_dointvec, | |
916 | }, | |
6b58e0a5 FD |
917 | { |
918 | .procname = "tcp_probe_threshold", | |
919 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
920 | .maxlen = sizeof(int), | |
921 | .mode = 0644, | |
922 | .proc_handler = proc_dointvec, | |
923 | }, | |
05cbc0db FD |
924 | { |
925 | .procname = "tcp_probe_interval", | |
926 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
927 | .maxlen = sizeof(int), | |
928 | .mode = 0644, | |
929 | .proc_handler = proc_dointvec, | |
930 | }, | |
df2cf4a7 PD |
931 | { |
932 | .procname = "igmp_link_local_mcast_reports", | |
87a8a2ae | 933 | .data = &init_net.ipv4.sysctl_igmp_llm_reports, |
df2cf4a7 PD |
934 | .maxlen = sizeof(int), |
935 | .mode = 0644, | |
936 | .proc_handler = proc_dointvec | |
937 | }, | |
815c5270 NB |
938 | { |
939 | .procname = "igmp_max_memberships", | |
940 | .data = &init_net.ipv4.sysctl_igmp_max_memberships, | |
941 | .maxlen = sizeof(int), | |
942 | .mode = 0644, | |
943 | .proc_handler = proc_dointvec | |
944 | }, | |
166b6b2d NB |
945 | { |
946 | .procname = "igmp_max_msf", | |
947 | .data = &init_net.ipv4.sysctl_igmp_max_msf, | |
948 | .maxlen = sizeof(int), | |
949 | .mode = 0644, | |
950 | .proc_handler = proc_dointvec | |
951 | }, | |
165094af NB |
952 | #ifdef CONFIG_IP_MULTICAST |
953 | { | |
954 | .procname = "igmp_qrv", | |
955 | .data = &init_net.ipv4.sysctl_igmp_qrv, | |
956 | .maxlen = sizeof(int), | |
957 | .mode = 0644, | |
958 | .proc_handler = proc_dointvec_minmax, | |
959 | .extra1 = &one | |
960 | }, | |
961 | #endif | |
13b287e8 NB |
962 | { |
963 | .procname = "tcp_keepalive_time", | |
964 | .data = &init_net.ipv4.sysctl_tcp_keepalive_time, | |
965 | .maxlen = sizeof(int), | |
966 | .mode = 0644, | |
967 | .proc_handler = proc_dointvec_jiffies, | |
968 | }, | |
9bd6861b NB |
969 | { |
970 | .procname = "tcp_keepalive_probes", | |
971 | .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, | |
972 | .maxlen = sizeof(int), | |
973 | .mode = 0644, | |
974 | .proc_handler = proc_dointvec | |
975 | }, | |
b840d15d NB |
976 | { |
977 | .procname = "tcp_keepalive_intvl", | |
978 | .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, | |
979 | .maxlen = sizeof(int), | |
980 | .mode = 0644, | |
981 | .proc_handler = proc_dointvec_jiffies, | |
982 | }, | |
6fa25166 NB |
983 | { |
984 | .procname = "tcp_syn_retries", | |
985 | .data = &init_net.ipv4.sysctl_tcp_syn_retries, | |
986 | .maxlen = sizeof(int), | |
987 | .mode = 0644, | |
988 | .proc_handler = proc_dointvec_minmax, | |
989 | .extra1 = &tcp_syn_retries_min, | |
990 | .extra2 = &tcp_syn_retries_max | |
991 | }, | |
7c083ecb NB |
992 | { |
993 | .procname = "tcp_synack_retries", | |
994 | .data = &init_net.ipv4.sysctl_tcp_synack_retries, | |
995 | .maxlen = sizeof(int), | |
996 | .mode = 0644, | |
997 | .proc_handler = proc_dointvec | |
998 | }, | |
12ed8244 NB |
999 | #ifdef CONFIG_SYN_COOKIES |
1000 | { | |
1001 | .procname = "tcp_syncookies", | |
1002 | .data = &init_net.ipv4.sysctl_tcp_syncookies, | |
1003 | .maxlen = sizeof(int), | |
1004 | .mode = 0644, | |
1005 | .proc_handler = proc_dointvec | |
1006 | }, | |
1007 | #endif | |
1043e25f NB |
1008 | { |
1009 | .procname = "tcp_reordering", | |
1010 | .data = &init_net.ipv4.sysctl_tcp_reordering, | |
1011 | .maxlen = sizeof(int), | |
1012 | .mode = 0644, | |
1013 | .proc_handler = proc_dointvec | |
1014 | }, | |
ae5c3f40 NB |
1015 | { |
1016 | .procname = "tcp_retries1", | |
1017 | .data = &init_net.ipv4.sysctl_tcp_retries1, | |
1018 | .maxlen = sizeof(int), | |
1019 | .mode = 0644, | |
1020 | .proc_handler = proc_dointvec_minmax, | |
1021 | .extra2 = &tcp_retr1_max | |
1022 | }, | |
c6214a97 NB |
1023 | { |
1024 | .procname = "tcp_retries2", | |
1025 | .data = &init_net.ipv4.sysctl_tcp_retries2, | |
1026 | .maxlen = sizeof(int), | |
1027 | .mode = 0644, | |
1028 | .proc_handler = proc_dointvec | |
1029 | }, | |
c402d9be NB |
1030 | { |
1031 | .procname = "tcp_orphan_retries", | |
1032 | .data = &init_net.ipv4.sysctl_tcp_orphan_retries, | |
1033 | .maxlen = sizeof(int), | |
1034 | .mode = 0644, | |
1035 | .proc_handler = proc_dointvec | |
1036 | }, | |
1e579caa NB |
1037 | { |
1038 | .procname = "tcp_fin_timeout", | |
1039 | .data = &init_net.ipv4.sysctl_tcp_fin_timeout, | |
1040 | .maxlen = sizeof(int), | |
1041 | .mode = 0644, | |
1042 | .proc_handler = proc_dointvec_jiffies, | |
1043 | }, | |
4979f2d9 NB |
1044 | { |
1045 | .procname = "tcp_notsent_lowat", | |
1046 | .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, | |
1047 | .maxlen = sizeof(unsigned int), | |
1048 | .mode = 0644, | |
b007f090 | 1049 | .proc_handler = proc_douintvec, |
4979f2d9 | 1050 | }, |
56ab6b93 HY |
1051 | { |
1052 | .procname = "tcp_tw_reuse", | |
1053 | .data = &init_net.ipv4.sysctl_tcp_tw_reuse, | |
1054 | .maxlen = sizeof(int), | |
1055 | .mode = 0644, | |
1056 | .proc_handler = proc_dointvec | |
1057 | }, | |
1946e672 HY |
1058 | { |
1059 | .procname = "tcp_max_tw_buckets", | |
1060 | .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, | |
1061 | .maxlen = sizeof(int), | |
1062 | .mode = 0644, | |
1063 | .proc_handler = proc_dointvec | |
1064 | }, | |
fee83d09 HY |
1065 | { |
1066 | .procname = "tcp_max_syn_backlog", | |
1067 | .data = &init_net.ipv4.sysctl_max_syn_backlog, | |
1068 | .maxlen = sizeof(int), | |
1069 | .mode = 0644, | |
1070 | .proc_handler = proc_dointvec | |
1071 | }, | |
e1cfcbe8 HY |
1072 | { |
1073 | .procname = "tcp_fastopen", | |
1074 | .data = &init_net.ipv4.sysctl_tcp_fastopen, | |
1075 | .maxlen = sizeof(int), | |
1076 | .mode = 0644, | |
1077 | .proc_handler = proc_dointvec, | |
1078 | }, | |
43713848 HY |
1079 | { |
1080 | .procname = "tcp_fastopen_key", | |
1081 | .mode = 0600, | |
1082 | .data = &init_net.ipv4.sysctl_tcp_fastopen, | |
1083 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
1084 | .proc_handler = proc_tcp_fastopen_key, | |
1085 | }, | |
a6db4494 DA |
1086 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
1087 | { | |
1088 | .procname = "fib_multipath_use_neigh", | |
1089 | .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, | |
1090 | .maxlen = sizeof(int), | |
1091 | .mode = 0644, | |
1092 | .proc_handler = proc_dointvec_minmax, | |
bf4e0a3d NA |
1093 | .extra1 = &zero, |
1094 | .extra2 = &one, | |
1095 | }, | |
1096 | { | |
1097 | .procname = "fib_multipath_hash_policy", | |
1098 | .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy, | |
1099 | .maxlen = sizeof(int), | |
1100 | .mode = 0644, | |
1101 | .proc_handler = proc_dointvec_minmax, | |
a6db4494 DA |
1102 | .extra1 = &zero, |
1103 | .extra2 = &one, | |
1104 | }, | |
1105 | #endif | |
4548b683 KJ |
1106 | { |
1107 | .procname = "ip_unprivileged_port_start", | |
1108 | .maxlen = sizeof(int), | |
1109 | .data = &init_net.ipv4.sysctl_ip_prot_sock, | |
1110 | .mode = 0644, | |
1111 | .proc_handler = ipv4_privileged_ports, | |
1112 | }, | |
63a6fff3 RS |
1113 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1114 | { | |
1115 | .procname = "udp_l3mdev_accept", | |
1116 | .data = &init_net.ipv4.sysctl_udp_l3mdev_accept, | |
1117 | .maxlen = sizeof(int), | |
1118 | .mode = 0644, | |
1119 | .proc_handler = proc_dointvec_minmax, | |
1120 | .extra1 = &zero, | |
1121 | .extra2 = &one, | |
1122 | }, | |
1123 | #endif | |
f9301034 ED |
1124 | { |
1125 | .procname = "tcp_sack", | |
1126 | .data = &init_net.ipv4.sysctl_tcp_sack, | |
1127 | .maxlen = sizeof(int), | |
1128 | .mode = 0644, | |
1129 | .proc_handler = proc_dointvec | |
1130 | }, | |
9bb37ef0 ED |
1131 | { |
1132 | .procname = "tcp_window_scaling", | |
1133 | .data = &init_net.ipv4.sysctl_tcp_window_scaling, | |
1134 | .maxlen = sizeof(int), | |
1135 | .mode = 0644, | |
1136 | .proc_handler = proc_dointvec | |
1137 | }, | |
5d2ed052 ED |
1138 | { |
1139 | .procname = "tcp_timestamps", | |
1140 | .data = &init_net.ipv4.sysctl_tcp_timestamps, | |
1141 | .maxlen = sizeof(int), | |
1142 | .mode = 0644, | |
1143 | .proc_handler = proc_dointvec | |
1144 | }, | |
68528f09 PE |
1145 | { } |
1146 | }; | |
1147 | ||
1577519d PE |
1148 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
1149 | { | |
68528f09 PE |
1150 | struct ctl_table *table; |
1151 | ||
1152 | table = ipv4_net_table; | |
09ad9bc7 | 1153 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
1154 | int i; |
1155 | ||
68528f09 | 1156 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
51456b29 | 1157 | if (!table) |
68528f09 PE |
1158 | goto err_alloc; |
1159 | ||
0a6fa23d EB |
1160 | /* Update the variables to point into the current struct net */ |
1161 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
1162 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
1163 | } |
1164 | ||
ec8f23ce | 1165 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
51456b29 | 1166 | if (!net->ipv4.ipv4_hdr) |
68528f09 PE |
1167 | goto err_reg; |
1168 | ||
122ff243 WC |
1169 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
1170 | if (!net->ipv4.sysctl_local_reserved_ports) | |
1171 | goto err_ports; | |
1172 | ||
1577519d | 1173 | return 0; |
68528f09 | 1174 | |
122ff243 WC |
1175 | err_ports: |
1176 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 1177 | err_reg: |
09ad9bc7 | 1178 | if (!net_eq(net, &init_net)) |
68528f09 PE |
1179 | kfree(table); |
1180 | err_alloc: | |
1181 | return -ENOMEM; | |
1577519d PE |
1182 | } |
1183 | ||
1184 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
1185 | { | |
68528f09 PE |
1186 | struct ctl_table *table; |
1187 | ||
122ff243 | 1188 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
1189 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
1190 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
1191 | kfree(table); | |
1577519d PE |
1192 | } |
1193 | ||
1194 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
1195 | .init = ipv4_sysctl_init_net, | |
1196 | .exit = ipv4_sysctl_exit_net, | |
1197 | }; | |
1198 | ||
3e37c3f9 PE |
1199 | static __init int sysctl_ipv4_init(void) |
1200 | { | |
1201 | struct ctl_table_header *hdr; | |
1202 | ||
ec8f23ce | 1203 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
51456b29 | 1204 | if (!hdr) |
1577519d PE |
1205 | return -ENOMEM; |
1206 | ||
1207 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 1208 | unregister_net_sysctl_table(hdr); |
1577519d PE |
1209 | return -ENOMEM; |
1210 | } | |
1211 | ||
1212 | return 0; | |
3e37c3f9 PE |
1213 | } |
1214 | ||
1215 | __initcall(sysctl_ipv4_init); |