Commit | Line | Data |
---|---|---|
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> |
1da177e4 | 27 | |
89cee8b1 | 28 | static int zero; |
cdda8891 | 29 | static int one = 1; |
6ba8a3b1 | 30 | static int four = 4; |
43e122b0 | 31 | static int thousand = 1000; |
95bd09eb | 32 | static int gso_max_segs = GSO_MAX_SEGS; |
e905a9ed | 33 | static int tcp_retr1_max = 255; |
1da177e4 LT |
34 | static int ip_local_port_range_min[] = { 1, 1 }; |
35 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
36 | static int tcp_adv_win_scale_min = -31; |
37 | static int tcp_adv_win_scale_max = 31; | |
4548b683 KJ |
38 | static int ip_privileged_port_min; |
39 | static int ip_privileged_port_max = 65535; | |
249fab77 ED |
40 | static int ip_ttl_min = 1; |
41 | static int ip_ttl_max = 255; | |
651e9271 MT |
42 | static int tcp_syn_retries_min = 1; |
43 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; | |
c319b4d7 VK |
44 | static int ip_ping_group_range_min[] = { 0, 0 }; |
45 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 46 | |
227b60f5 | 47 | /* Update system visible IP port range */ |
0bbf87d8 | 48 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 49 | { |
ed2dfd90 ED |
50 | bool same_parity = !((range[0] ^ range[1]) & 1); |
51 | ||
4ee3bd4a | 52 | write_seqlock_bh(&net->ipv4.ip_local_ports.lock); |
ed2dfd90 ED |
53 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
54 | net->ipv4.ip_local_ports.warned = true; | |
55 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); | |
56 | } | |
c9d8f1a6 CW |
57 | net->ipv4.ip_local_ports.range[0] = range[0]; |
58 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
4ee3bd4a | 59 | write_sequnlock_bh(&net->ipv4.ip_local_ports.lock); |
227b60f5 SH |
60 | } |
61 | ||
62 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 63 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
64 | void __user *buffer, |
65 | size_t *lenp, loff_t *ppos) | |
66 | { | |
0bbf87d8 | 67 | struct net *net = |
c9d8f1a6 | 68 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 69 | int ret; |
3c689b73 | 70 | int range[2]; |
fe2c6338 | 71 | struct ctl_table tmp = { |
227b60f5 SH |
72 | .data = &range, |
73 | .maxlen = sizeof(range), | |
74 | .mode = table->mode, | |
75 | .extra1 = &ip_local_port_range_min, | |
76 | .extra2 = &ip_local_port_range_max, | |
77 | }; | |
78 | ||
0bbf87d8 EB |
79 | inet_get_local_port_range(net, &range[0], &range[1]); |
80 | ||
8d65af78 | 81 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
82 | |
83 | if (write && ret == 0) { | |
4548b683 KJ |
84 | /* Ensure that the upper limit is not smaller than the lower, |
85 | * and that the lower does not encroach upon the privileged | |
86 | * port limit. | |
87 | */ | |
88 | if ((range[1] < range[0]) || | |
89 | (range[0] < net->ipv4.sysctl_ip_prot_sock)) | |
227b60f5 SH |
90 | ret = -EINVAL; |
91 | else | |
0bbf87d8 | 92 | set_local_port_range(net, range); |
227b60f5 SH |
93 | } |
94 | ||
95 | return ret; | |
96 | } | |
97 | ||
4548b683 KJ |
98 | /* Validate changes from /proc interface. */ |
99 | static int ipv4_privileged_ports(struct ctl_table *table, int write, | |
100 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
101 | { | |
102 | struct net *net = container_of(table->data, struct net, | |
103 | ipv4.sysctl_ip_prot_sock); | |
104 | int ret; | |
105 | int pports; | |
106 | int range[2]; | |
107 | struct ctl_table tmp = { | |
108 | .data = &pports, | |
109 | .maxlen = sizeof(pports), | |
110 | .mode = table->mode, | |
111 | .extra1 = &ip_privileged_port_min, | |
112 | .extra2 = &ip_privileged_port_max, | |
113 | }; | |
114 | ||
115 | pports = net->ipv4.sysctl_ip_prot_sock; | |
116 | ||
117 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
118 | ||
119 | if (write && ret == 0) { | |
120 | inet_get_local_port_range(net, &range[0], &range[1]); | |
121 | /* Ensure that the local port range doesn't overlap with the | |
122 | * privileged port range. | |
123 | */ | |
124 | if (range[0] < pports) | |
125 | ret = -EINVAL; | |
126 | else | |
127 | net->ipv4.sysctl_ip_prot_sock = pports; | |
128 | } | |
129 | ||
130 | return ret; | |
131 | } | |
c319b4d7 | 132 | |
7064d16e | 133 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 134 | { |
7064d16e | 135 | kgid_t *data = table->data; |
0bbf87d8 | 136 | struct net *net = |
ba6b918a | 137 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 138 | unsigned int seq; |
c319b4d7 | 139 | do { |
396a30cc | 140 | seq = read_seqbegin(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
141 | |
142 | *low = data[0]; | |
143 | *high = data[1]; | |
396a30cc | 144 | } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq)); |
c319b4d7 VK |
145 | } |
146 | ||
147 | /* Update system visible IP port range */ | |
7064d16e | 148 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 149 | { |
7064d16e | 150 | kgid_t *data = table->data; |
0bbf87d8 | 151 | struct net *net = |
ba6b918a | 152 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
396a30cc | 153 | write_seqlock(&net->ipv4.ping_group_range.lock); |
7064d16e EB |
154 | data[0] = low; |
155 | data[1] = high; | |
396a30cc | 156 | write_sequnlock(&net->ipv4.ping_group_range.lock); |
c319b4d7 VK |
157 | } |
158 | ||
159 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 160 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
161 | void __user *buffer, |
162 | size_t *lenp, loff_t *ppos) | |
163 | { | |
7064d16e | 164 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 165 | int ret; |
7064d16e EB |
166 | gid_t urange[2]; |
167 | kgid_t low, high; | |
fe2c6338 | 168 | struct ctl_table tmp = { |
7064d16e EB |
169 | .data = &urange, |
170 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
171 | .mode = table->mode, |
172 | .extra1 = &ip_ping_group_range_min, | |
173 | .extra2 = &ip_ping_group_range_max, | |
174 | }; | |
175 | ||
7064d16e EB |
176 | inet_get_ping_group_range_table(table, &low, &high); |
177 | urange[0] = from_kgid_munged(user_ns, low); | |
178 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
179 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
180 | ||
7064d16e EB |
181 | if (write && ret == 0) { |
182 | low = make_kgid(user_ns, urange[0]); | |
183 | high = make_kgid(user_ns, urange[1]); | |
184 | if (!gid_valid(low) || !gid_valid(high) || | |
185 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
186 | low = make_kgid(&init_user_ns, 1); | |
187 | high = make_kgid(&init_user_ns, 0); | |
188 | } | |
189 | set_ping_group_range(table, low, high); | |
190 | } | |
c319b4d7 VK |
191 | |
192 | return ret; | |
193 | } | |
194 | ||
fe2c6338 | 195 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
196 | void __user *buffer, size_t *lenp, loff_t *ppos) |
197 | { | |
198 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 199 | struct ctl_table tbl = { |
317a76f9 SH |
200 | .data = val, |
201 | .maxlen = TCP_CA_NAME_MAX, | |
202 | }; | |
203 | int ret; | |
204 | ||
205 | tcp_get_default_congestion_control(val); | |
206 | ||
8d65af78 | 207 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
208 | if (write && ret == 0) |
209 | ret = tcp_set_default_congestion_control(val); | |
210 | return ret; | |
211 | } | |
212 | ||
fe2c6338 | 213 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 214 | int write, |
3ff825b2 SH |
215 | void __user *buffer, size_t *lenp, |
216 | loff_t *ppos) | |
217 | { | |
fe2c6338 | 218 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
219 | int ret; |
220 | ||
221 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
222 | if (!tbl.data) | |
223 | return -ENOMEM; | |
224 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 225 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
226 | kfree(tbl.data); |
227 | return ret; | |
228 | } | |
229 | ||
fe2c6338 | 230 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 231 | int write, |
ce7bc3bf SH |
232 | void __user *buffer, size_t *lenp, |
233 | loff_t *ppos) | |
234 | { | |
fe2c6338 | 235 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
236 | int ret; |
237 | ||
238 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
239 | if (!tbl.data) | |
240 | return -ENOMEM; | |
241 | ||
242 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 243 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
244 | if (write && ret == 0) |
245 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
246 | kfree(tbl.data); | |
247 | return ret; | |
248 | } | |
249 | ||
fe2c6338 JP |
250 | static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write, |
251 | void __user *buffer, size_t *lenp, | |
252 | loff_t *ppos) | |
10467163 | 253 | { |
fe2c6338 | 254 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
255 | struct tcp_fastopen_context *ctxt; |
256 | int ret; | |
257 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
258 | ||
259 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
260 | if (!tbl.data) | |
261 | return -ENOMEM; | |
262 | ||
263 | rcu_read_lock(); | |
264 | ctxt = rcu_dereference(tcp_fastopen_ctx); | |
265 | if (ctxt) | |
266 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
267 | else |
268 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
269 | rcu_read_unlock(); |
270 | ||
271 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
272 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
273 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
274 | ||
275 | if (write && ret == 0) { | |
276 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
277 | user_key + 2, user_key + 3) != 4) { | |
278 | ret = -EINVAL; | |
279 | goto bad_key; | |
280 | } | |
222e83d2 HFS |
281 | /* Generate a dummy secret but don't publish it. This |
282 | * is needed so we don't regenerate a new key on the | |
283 | * first invocation of tcp_fastopen_cookie_gen | |
284 | */ | |
285 | tcp_fastopen_init_key_once(false); | |
10467163 JC |
286 | tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH); |
287 | } | |
288 | ||
289 | bad_key: | |
290 | pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", | |
291 | user_key[0], user_key[1], user_key[2], user_key[3], | |
292 | (char *)tbl.data, ret); | |
293 | kfree(tbl.data); | |
294 | return ret; | |
295 | } | |
296 | ||
3e37c3f9 | 297 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 298 | { |
1da177e4 LT |
299 | .procname = "tcp_timestamps", |
300 | .data = &sysctl_tcp_timestamps, | |
301 | .maxlen = sizeof(int), | |
302 | .mode = 0644, | |
6d9f239a | 303 | .proc_handler = proc_dointvec |
1da177e4 | 304 | }, |
e905a9ed | 305 | { |
1da177e4 LT |
306 | .procname = "tcp_window_scaling", |
307 | .data = &sysctl_tcp_window_scaling, | |
308 | .maxlen = sizeof(int), | |
309 | .mode = 0644, | |
6d9f239a | 310 | .proc_handler = proc_dointvec |
1da177e4 | 311 | }, |
e905a9ed | 312 | { |
1da177e4 LT |
313 | .procname = "tcp_sack", |
314 | .data = &sysctl_tcp_sack, | |
315 | .maxlen = sizeof(int), | |
316 | .mode = 0644, | |
6d9f239a | 317 | .proc_handler = proc_dointvec |
1da177e4 | 318 | }, |
e905a9ed | 319 | { |
1da177e4 LT |
320 | .procname = "tcp_retrans_collapse", |
321 | .data = &sysctl_tcp_retrans_collapse, | |
322 | .maxlen = sizeof(int), | |
323 | .mode = 0644, | |
6d9f239a | 324 | .proc_handler = proc_dointvec |
1da177e4 | 325 | }, |
1da177e4 | 326 | { |
1da177e4 LT |
327 | .procname = "tcp_max_orphans", |
328 | .data = &sysctl_tcp_max_orphans, | |
329 | .maxlen = sizeof(int), | |
330 | .mode = 0644, | |
6d9f239a | 331 | .proc_handler = proc_dointvec |
1da177e4 | 332 | }, |
2100c8d2 YC |
333 | { |
334 | .procname = "tcp_fastopen", | |
335 | .data = &sysctl_tcp_fastopen, | |
336 | .maxlen = sizeof(int), | |
337 | .mode = 0644, | |
338 | .proc_handler = proc_dointvec, | |
339 | }, | |
10467163 JC |
340 | { |
341 | .procname = "tcp_fastopen_key", | |
342 | .mode = 0600, | |
343 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
344 | .proc_handler = proc_tcp_fastopen_key, | |
345 | }, | |
1da177e4 | 346 | { |
1da177e4 LT |
347 | .procname = "tcp_abort_on_overflow", |
348 | .data = &sysctl_tcp_abort_on_overflow, | |
349 | .maxlen = sizeof(int), | |
350 | .mode = 0644, | |
6d9f239a | 351 | .proc_handler = proc_dointvec |
1da177e4 LT |
352 | }, |
353 | { | |
1da177e4 LT |
354 | .procname = "tcp_stdurg", |
355 | .data = &sysctl_tcp_stdurg, | |
356 | .maxlen = sizeof(int), | |
357 | .mode = 0644, | |
6d9f239a | 358 | .proc_handler = proc_dointvec |
1da177e4 LT |
359 | }, |
360 | { | |
1da177e4 LT |
361 | .procname = "tcp_rfc1337", |
362 | .data = &sysctl_tcp_rfc1337, | |
363 | .maxlen = sizeof(int), | |
364 | .mode = 0644, | |
6d9f239a | 365 | .proc_handler = proc_dointvec |
1da177e4 | 366 | }, |
1da177e4 | 367 | { |
1da177e4 LT |
368 | .procname = "inet_peer_threshold", |
369 | .data = &inet_peer_threshold, | |
370 | .maxlen = sizeof(int), | |
371 | .mode = 0644, | |
6d9f239a | 372 | .proc_handler = proc_dointvec |
1da177e4 LT |
373 | }, |
374 | { | |
1da177e4 LT |
375 | .procname = "inet_peer_minttl", |
376 | .data = &inet_peer_minttl, | |
377 | .maxlen = sizeof(int), | |
378 | .mode = 0644, | |
6d9f239a | 379 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
380 | }, |
381 | { | |
1da177e4 LT |
382 | .procname = "inet_peer_maxttl", |
383 | .data = &inet_peer_maxttl, | |
384 | .maxlen = sizeof(int), | |
385 | .mode = 0644, | |
6d9f239a | 386 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 387 | }, |
1da177e4 | 388 | { |
1da177e4 LT |
389 | .procname = "tcp_fack", |
390 | .data = &sysctl_tcp_fack, | |
391 | .maxlen = sizeof(int), | |
392 | .mode = 0644, | |
6d9f239a | 393 | .proc_handler = proc_dointvec |
1da177e4 | 394 | }, |
4f41b1c5 YC |
395 | { |
396 | .procname = "tcp_recovery", | |
397 | .data = &sysctl_tcp_recovery, | |
398 | .maxlen = sizeof(int), | |
399 | .mode = 0644, | |
400 | .proc_handler = proc_dointvec, | |
401 | }, | |
dca145ff ED |
402 | { |
403 | .procname = "tcp_max_reordering", | |
404 | .data = &sysctl_tcp_max_reordering, | |
405 | .maxlen = sizeof(int), | |
406 | .mode = 0644, | |
407 | .proc_handler = proc_dointvec | |
408 | }, | |
1da177e4 | 409 | { |
1da177e4 LT |
410 | .procname = "tcp_dsack", |
411 | .data = &sysctl_tcp_dsack, | |
412 | .maxlen = sizeof(int), | |
413 | .mode = 0644, | |
6d9f239a | 414 | .proc_handler = proc_dointvec |
1da177e4 | 415 | }, |
a4fe34bf EB |
416 | { |
417 | .procname = "tcp_mem", | |
418 | .maxlen = sizeof(sysctl_tcp_mem), | |
419 | .data = &sysctl_tcp_mem, | |
420 | .mode = 0644, | |
421 | .proc_handler = proc_doulongvec_minmax, | |
422 | }, | |
1da177e4 | 423 | { |
1da177e4 LT |
424 | .procname = "tcp_wmem", |
425 | .data = &sysctl_tcp_wmem, | |
426 | .maxlen = sizeof(sysctl_tcp_wmem), | |
427 | .mode = 0644, | |
cdda8891 | 428 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 429 | .extra1 = &one, |
1da177e4 LT |
430 | }, |
431 | { | |
1da177e4 LT |
432 | .procname = "tcp_rmem", |
433 | .data = &sysctl_tcp_rmem, | |
434 | .maxlen = sizeof(sysctl_tcp_rmem), | |
435 | .mode = 0644, | |
cdda8891 | 436 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 437 | .extra1 = &one, |
1da177e4 LT |
438 | }, |
439 | { | |
1da177e4 LT |
440 | .procname = "tcp_app_win", |
441 | .data = &sysctl_tcp_app_win, | |
442 | .maxlen = sizeof(int), | |
443 | .mode = 0644, | |
6d9f239a | 444 | .proc_handler = proc_dointvec |
1da177e4 LT |
445 | }, |
446 | { | |
1da177e4 LT |
447 | .procname = "tcp_adv_win_scale", |
448 | .data = &sysctl_tcp_adv_win_scale, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
0147fc05 AD |
451 | .proc_handler = proc_dointvec_minmax, |
452 | .extra1 = &tcp_adv_win_scale_min, | |
453 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 454 | }, |
1da177e4 | 455 | { |
1da177e4 LT |
456 | .procname = "tcp_frto", |
457 | .data = &sysctl_tcp_frto, | |
458 | .maxlen = sizeof(int), | |
f6722583 YC |
459 | .mode = 0644, |
460 | .proc_handler = proc_dointvec | |
461 | }, | |
462 | { | |
463 | .procname = "tcp_min_rtt_wlen", | |
464 | .data = &sysctl_tcp_min_rtt_wlen, | |
465 | .maxlen = sizeof(int), | |
1da177e4 | 466 | .mode = 0644, |
6d9f239a | 467 | .proc_handler = proc_dointvec |
1da177e4 LT |
468 | }, |
469 | { | |
1da177e4 LT |
470 | .procname = "tcp_low_latency", |
471 | .data = &sysctl_tcp_low_latency, | |
472 | .maxlen = sizeof(int), | |
473 | .mode = 0644, | |
6d9f239a | 474 | .proc_handler = proc_dointvec |
1da177e4 | 475 | }, |
1da177e4 | 476 | { |
1da177e4 LT |
477 | .procname = "tcp_no_metrics_save", |
478 | .data = &sysctl_tcp_nometrics_save, | |
479 | .maxlen = sizeof(int), | |
480 | .mode = 0644, | |
6d9f239a | 481 | .proc_handler = proc_dointvec, |
1da177e4 | 482 | }, |
1da177e4 | 483 | { |
1da177e4 LT |
484 | .procname = "tcp_moderate_rcvbuf", |
485 | .data = &sysctl_tcp_moderate_rcvbuf, | |
486 | .maxlen = sizeof(int), | |
487 | .mode = 0644, | |
6d9f239a | 488 | .proc_handler = proc_dointvec, |
1da177e4 LT |
489 | }, |
490 | { | |
1da177e4 LT |
491 | .procname = "tcp_tso_win_divisor", |
492 | .data = &sysctl_tcp_tso_win_divisor, | |
493 | .maxlen = sizeof(int), | |
494 | .mode = 0644, | |
6d9f239a | 495 | .proc_handler = proc_dointvec, |
1da177e4 LT |
496 | }, |
497 | { | |
317a76f9 | 498 | .procname = "tcp_congestion_control", |
1da177e4 | 499 | .mode = 0644, |
317a76f9 | 500 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 501 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 502 | }, |
e905a9ed | 503 | { |
15d99e02 RJ |
504 | .procname = "tcp_workaround_signed_windows", |
505 | .data = &sysctl_tcp_workaround_signed_windows, | |
506 | .maxlen = sizeof(int), | |
507 | .mode = 0644, | |
6d9f239a | 508 | .proc_handler = proc_dointvec |
15d99e02 | 509 | }, |
46d3ceab ED |
510 | { |
511 | .procname = "tcp_limit_output_bytes", | |
512 | .data = &sysctl_tcp_limit_output_bytes, | |
513 | .maxlen = sizeof(int), | |
514 | .mode = 0644, | |
515 | .proc_handler = proc_dointvec | |
516 | }, | |
282f23c6 ED |
517 | { |
518 | .procname = "tcp_challenge_ack_limit", | |
519 | .data = &sysctl_tcp_challenge_ack_limit, | |
520 | .maxlen = sizeof(int), | |
521 | .mode = 0644, | |
522 | .proc_handler = proc_dointvec | |
523 | }, | |
35089bb2 | 524 | { |
35089bb2 DM |
525 | .procname = "tcp_slow_start_after_idle", |
526 | .data = &sysctl_tcp_slow_start_after_idle, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
6d9f239a | 529 | .proc_handler = proc_dointvec |
35089bb2 | 530 | }, |
446fda4f PM |
531 | #ifdef CONFIG_NETLABEL |
532 | { | |
446fda4f PM |
533 | .procname = "cipso_cache_enable", |
534 | .data = &cipso_v4_cache_enabled, | |
535 | .maxlen = sizeof(int), | |
536 | .mode = 0644, | |
6d9f239a | 537 | .proc_handler = proc_dointvec, |
446fda4f PM |
538 | }, |
539 | { | |
446fda4f PM |
540 | .procname = "cipso_cache_bucket_size", |
541 | .data = &cipso_v4_cache_bucketsize, | |
542 | .maxlen = sizeof(int), | |
543 | .mode = 0644, | |
6d9f239a | 544 | .proc_handler = proc_dointvec, |
446fda4f PM |
545 | }, |
546 | { | |
446fda4f PM |
547 | .procname = "cipso_rbm_optfmt", |
548 | .data = &cipso_v4_rbm_optfmt, | |
549 | .maxlen = sizeof(int), | |
550 | .mode = 0644, | |
6d9f239a | 551 | .proc_handler = proc_dointvec, |
446fda4f PM |
552 | }, |
553 | { | |
446fda4f PM |
554 | .procname = "cipso_rbm_strictvalid", |
555 | .data = &cipso_v4_rbm_strictvalid, | |
556 | .maxlen = sizeof(int), | |
557 | .mode = 0644, | |
6d9f239a | 558 | .proc_handler = proc_dointvec, |
446fda4f PM |
559 | }, |
560 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 561 | { |
3ff825b2 SH |
562 | .procname = "tcp_available_congestion_control", |
563 | .maxlen = TCP_CA_BUF_MAX, | |
564 | .mode = 0444, | |
6d9f239a | 565 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 566 | }, |
ce7bc3bf | 567 | { |
ce7bc3bf SH |
568 | .procname = "tcp_allowed_congestion_control", |
569 | .maxlen = TCP_CA_BUF_MAX, | |
570 | .mode = 0644, | |
6d9f239a | 571 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 572 | }, |
36e31b0a AP |
573 | { |
574 | .procname = "tcp_thin_linear_timeouts", | |
575 | .data = &sysctl_tcp_thin_linear_timeouts, | |
576 | .maxlen = sizeof(int), | |
577 | .mode = 0644, | |
578 | .proc_handler = proc_dointvec | |
579 | }, | |
eed530b6 YC |
580 | { |
581 | .procname = "tcp_early_retrans", | |
582 | .data = &sysctl_tcp_early_retrans, | |
583 | .maxlen = sizeof(int), | |
584 | .mode = 0644, | |
585 | .proc_handler = proc_dointvec_minmax, | |
586 | .extra1 = &zero, | |
6ba8a3b1 | 587 | .extra2 = &four, |
eed530b6 | 588 | }, |
95bd09eb ED |
589 | { |
590 | .procname = "tcp_min_tso_segs", | |
591 | .data = &sysctl_tcp_min_tso_segs, | |
592 | .maxlen = sizeof(int), | |
593 | .mode = 0644, | |
594 | .proc_handler = proc_dointvec_minmax, | |
d6a4e26a | 595 | .extra1 = &one, |
95bd09eb ED |
596 | .extra2 = &gso_max_segs, |
597 | }, | |
43e122b0 ED |
598 | { |
599 | .procname = "tcp_pacing_ss_ratio", | |
600 | .data = &sysctl_tcp_pacing_ss_ratio, | |
601 | .maxlen = sizeof(int), | |
602 | .mode = 0644, | |
603 | .proc_handler = proc_dointvec_minmax, | |
604 | .extra1 = &zero, | |
605 | .extra2 = &thousand, | |
606 | }, | |
607 | { | |
608 | .procname = "tcp_pacing_ca_ratio", | |
609 | .data = &sysctl_tcp_pacing_ca_ratio, | |
610 | .maxlen = sizeof(int), | |
611 | .mode = 0644, | |
612 | .proc_handler = proc_dointvec_minmax, | |
613 | .extra1 = &zero, | |
614 | .extra2 = &thousand, | |
615 | }, | |
f54b3111 ED |
616 | { |
617 | .procname = "tcp_autocorking", | |
618 | .data = &sysctl_tcp_autocorking, | |
619 | .maxlen = sizeof(int), | |
620 | .mode = 0644, | |
621 | .proc_handler = proc_dointvec_minmax, | |
622 | .extra1 = &zero, | |
623 | .extra2 = &one, | |
624 | }, | |
032ee423 NC |
625 | { |
626 | .procname = "tcp_invalid_ratelimit", | |
627 | .data = &sysctl_tcp_invalid_ratelimit, | |
628 | .maxlen = sizeof(int), | |
629 | .mode = 0644, | |
630 | .proc_handler = proc_dointvec_ms_jiffies, | |
631 | }, | |
4cdf507d ED |
632 | { |
633 | .procname = "icmp_msgs_per_sec", | |
634 | .data = &sysctl_icmp_msgs_per_sec, | |
635 | .maxlen = sizeof(int), | |
636 | .mode = 0644, | |
637 | .proc_handler = proc_dointvec_minmax, | |
638 | .extra1 = &zero, | |
639 | }, | |
640 | { | |
641 | .procname = "icmp_msgs_burst", | |
642 | .data = &sysctl_icmp_msgs_burst, | |
643 | .maxlen = sizeof(int), | |
644 | .mode = 0644, | |
645 | .proc_handler = proc_dointvec_minmax, | |
646 | .extra1 = &zero, | |
647 | }, | |
95766fff | 648 | { |
95766fff HA |
649 | .procname = "udp_mem", |
650 | .data = &sysctl_udp_mem, | |
651 | .maxlen = sizeof(sysctl_udp_mem), | |
652 | .mode = 0644, | |
8d987e5c | 653 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
654 | }, |
655 | { | |
95766fff HA |
656 | .procname = "udp_rmem_min", |
657 | .data = &sysctl_udp_rmem_min, | |
658 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
659 | .mode = 0644, | |
6d9f239a | 660 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 661 | .extra1 = &one |
95766fff HA |
662 | }, |
663 | { | |
95766fff HA |
664 | .procname = "udp_wmem_min", |
665 | .data = &sysctl_udp_wmem_min, | |
666 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
667 | .mode = 0644, | |
6d9f239a | 668 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 669 | .extra1 = &one |
95766fff | 670 | }, |
f8572d8f | 671 | { } |
1da177e4 | 672 | }; |
3e37c3f9 | 673 | |
68528f09 PE |
674 | static struct ctl_table ipv4_net_table[] = { |
675 | { | |
68528f09 PE |
676 | .procname = "icmp_echo_ignore_all", |
677 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
678 | .maxlen = sizeof(int), | |
679 | .mode = 0644, | |
6d9f239a | 680 | .proc_handler = proc_dointvec |
68528f09 PE |
681 | }, |
682 | { | |
68528f09 PE |
683 | .procname = "icmp_echo_ignore_broadcasts", |
684 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
685 | .maxlen = sizeof(int), | |
686 | .mode = 0644, | |
6d9f239a | 687 | .proc_handler = proc_dointvec |
68528f09 PE |
688 | }, |
689 | { | |
68528f09 PE |
690 | .procname = "icmp_ignore_bogus_error_responses", |
691 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
692 | .maxlen = sizeof(int), | |
693 | .mode = 0644, | |
6d9f239a | 694 | .proc_handler = proc_dointvec |
68528f09 PE |
695 | }, |
696 | { | |
68528f09 PE |
697 | .procname = "icmp_errors_use_inbound_ifaddr", |
698 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
699 | .maxlen = sizeof(int), | |
700 | .mode = 0644, | |
6d9f239a | 701 | .proc_handler = proc_dointvec |
68528f09 PE |
702 | }, |
703 | { | |
68528f09 PE |
704 | .procname = "icmp_ratelimit", |
705 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
706 | .maxlen = sizeof(int), | |
707 | .mode = 0644, | |
6d9f239a | 708 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
709 | }, |
710 | { | |
68528f09 PE |
711 | .procname = "icmp_ratemask", |
712 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
713 | .maxlen = sizeof(int), | |
714 | .mode = 0644, | |
6d9f239a | 715 | .proc_handler = proc_dointvec |
68528f09 | 716 | }, |
c319b4d7 VK |
717 | { |
718 | .procname = "ping_group_range", | |
ba6b918a | 719 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 720 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
721 | .mode = 0644, |
722 | .proc_handler = ipv4_ping_group_range, | |
723 | }, | |
5d134f1c HFS |
724 | { |
725 | .procname = "tcp_ecn", | |
726 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
727 | .maxlen = sizeof(int), | |
728 | .mode = 0644, | |
729 | .proc_handler = proc_dointvec | |
730 | }, | |
49213555 DB |
731 | { |
732 | .procname = "tcp_ecn_fallback", | |
733 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
734 | .maxlen = sizeof(int), | |
735 | .mode = 0644, | |
736 | .proc_handler = proc_dointvec | |
737 | }, | |
287b7f38 NB |
738 | { |
739 | .procname = "ip_dynaddr", | |
740 | .data = &init_net.ipv4.sysctl_ip_dynaddr, | |
741 | .maxlen = sizeof(int), | |
742 | .mode = 0644, | |
743 | .proc_handler = proc_dointvec | |
744 | }, | |
e21145a9 NB |
745 | { |
746 | .procname = "ip_early_demux", | |
747 | .data = &init_net.ipv4.sysctl_ip_early_demux, | |
748 | .maxlen = sizeof(int), | |
749 | .mode = 0644, | |
750 | .proc_handler = proc_dointvec | |
751 | }, | |
fa50d974 NB |
752 | { |
753 | .procname = "ip_default_ttl", | |
754 | .data = &init_net.ipv4.sysctl_ip_default_ttl, | |
755 | .maxlen = sizeof(int), | |
756 | .mode = 0644, | |
757 | .proc_handler = proc_dointvec_minmax, | |
758 | .extra1 = &ip_ttl_min, | |
759 | .extra2 = &ip_ttl_max, | |
760 | }, | |
0bbf87d8 EB |
761 | { |
762 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
763 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
764 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
765 | .mode = 0644, |
766 | .proc_handler = ipv4_local_port_range, | |
767 | }, | |
122ff243 WC |
768 | { |
769 | .procname = "ip_local_reserved_ports", | |
770 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
771 | .maxlen = 65536, | |
772 | .mode = 0644, | |
773 | .proc_handler = proc_do_large_bitmap, | |
774 | }, | |
974eda11 HFS |
775 | { |
776 | .procname = "ip_no_pmtu_disc", | |
777 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
778 | .maxlen = sizeof(int), | |
779 | .mode = 0644, | |
780 | .proc_handler = proc_dointvec | |
781 | }, | |
f87c10a8 HFS |
782 | { |
783 | .procname = "ip_forward_use_pmtu", | |
784 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
785 | .maxlen = sizeof(int), | |
786 | .mode = 0644, | |
787 | .proc_handler = proc_dointvec, | |
788 | }, | |
49a60158 VB |
789 | { |
790 | .procname = "ip_nonlocal_bind", | |
791 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
792 | .maxlen = sizeof(int), | |
793 | .mode = 0644, | |
794 | .proc_handler = proc_dointvec | |
795 | }, | |
e110861f LC |
796 | { |
797 | .procname = "fwmark_reflect", | |
798 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
799 | .maxlen = sizeof(int), | |
800 | .mode = 0644, | |
801 | .proc_handler = proc_dointvec, | |
802 | }, | |
84f39b08 LC |
803 | { |
804 | .procname = "tcp_fwmark_accept", | |
805 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
806 | .maxlen = sizeof(int), | |
807 | .mode = 0644, | |
808 | .proc_handler = proc_dointvec, | |
809 | }, | |
6dd9a14e DA |
810 | #ifdef CONFIG_NET_L3_MASTER_DEV |
811 | { | |
812 | .procname = "tcp_l3mdev_accept", | |
813 | .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, | |
814 | .maxlen = sizeof(int), | |
815 | .mode = 0644, | |
816 | .proc_handler = proc_dointvec_minmax, | |
817 | .extra1 = &zero, | |
818 | .extra2 = &one, | |
819 | }, | |
820 | #endif | |
b0f9ca53 FD |
821 | { |
822 | .procname = "tcp_mtu_probing", | |
823 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
824 | .maxlen = sizeof(int), | |
825 | .mode = 0644, | |
826 | .proc_handler = proc_dointvec, | |
827 | }, | |
828 | { | |
829 | .procname = "tcp_base_mss", | |
830 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
831 | .maxlen = sizeof(int), | |
832 | .mode = 0644, | |
833 | .proc_handler = proc_dointvec, | |
834 | }, | |
6b58e0a5 FD |
835 | { |
836 | .procname = "tcp_probe_threshold", | |
837 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
838 | .maxlen = sizeof(int), | |
839 | .mode = 0644, | |
840 | .proc_handler = proc_dointvec, | |
841 | }, | |
05cbc0db FD |
842 | { |
843 | .procname = "tcp_probe_interval", | |
844 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
845 | .maxlen = sizeof(int), | |
846 | .mode = 0644, | |
847 | .proc_handler = proc_dointvec, | |
848 | }, | |
df2cf4a7 PD |
849 | { |
850 | .procname = "igmp_link_local_mcast_reports", | |
87a8a2ae | 851 | .data = &init_net.ipv4.sysctl_igmp_llm_reports, |
df2cf4a7 PD |
852 | .maxlen = sizeof(int), |
853 | .mode = 0644, | |
854 | .proc_handler = proc_dointvec | |
855 | }, | |
815c5270 NB |
856 | { |
857 | .procname = "igmp_max_memberships", | |
858 | .data = &init_net.ipv4.sysctl_igmp_max_memberships, | |
859 | .maxlen = sizeof(int), | |
860 | .mode = 0644, | |
861 | .proc_handler = proc_dointvec | |
862 | }, | |
166b6b2d NB |
863 | { |
864 | .procname = "igmp_max_msf", | |
865 | .data = &init_net.ipv4.sysctl_igmp_max_msf, | |
866 | .maxlen = sizeof(int), | |
867 | .mode = 0644, | |
868 | .proc_handler = proc_dointvec | |
869 | }, | |
165094af NB |
870 | #ifdef CONFIG_IP_MULTICAST |
871 | { | |
872 | .procname = "igmp_qrv", | |
873 | .data = &init_net.ipv4.sysctl_igmp_qrv, | |
874 | .maxlen = sizeof(int), | |
875 | .mode = 0644, | |
876 | .proc_handler = proc_dointvec_minmax, | |
877 | .extra1 = &one | |
878 | }, | |
879 | #endif | |
13b287e8 NB |
880 | { |
881 | .procname = "tcp_keepalive_time", | |
882 | .data = &init_net.ipv4.sysctl_tcp_keepalive_time, | |
883 | .maxlen = sizeof(int), | |
884 | .mode = 0644, | |
885 | .proc_handler = proc_dointvec_jiffies, | |
886 | }, | |
9bd6861b NB |
887 | { |
888 | .procname = "tcp_keepalive_probes", | |
889 | .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, | |
890 | .maxlen = sizeof(int), | |
891 | .mode = 0644, | |
892 | .proc_handler = proc_dointvec | |
893 | }, | |
b840d15d NB |
894 | { |
895 | .procname = "tcp_keepalive_intvl", | |
896 | .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, | |
897 | .maxlen = sizeof(int), | |
898 | .mode = 0644, | |
899 | .proc_handler = proc_dointvec_jiffies, | |
900 | }, | |
6fa25166 NB |
901 | { |
902 | .procname = "tcp_syn_retries", | |
903 | .data = &init_net.ipv4.sysctl_tcp_syn_retries, | |
904 | .maxlen = sizeof(int), | |
905 | .mode = 0644, | |
906 | .proc_handler = proc_dointvec_minmax, | |
907 | .extra1 = &tcp_syn_retries_min, | |
908 | .extra2 = &tcp_syn_retries_max | |
909 | }, | |
7c083ecb NB |
910 | { |
911 | .procname = "tcp_synack_retries", | |
912 | .data = &init_net.ipv4.sysctl_tcp_synack_retries, | |
913 | .maxlen = sizeof(int), | |
914 | .mode = 0644, | |
915 | .proc_handler = proc_dointvec | |
916 | }, | |
12ed8244 NB |
917 | #ifdef CONFIG_SYN_COOKIES |
918 | { | |
919 | .procname = "tcp_syncookies", | |
920 | .data = &init_net.ipv4.sysctl_tcp_syncookies, | |
921 | .maxlen = sizeof(int), | |
922 | .mode = 0644, | |
923 | .proc_handler = proc_dointvec | |
924 | }, | |
925 | #endif | |
1043e25f NB |
926 | { |
927 | .procname = "tcp_reordering", | |
928 | .data = &init_net.ipv4.sysctl_tcp_reordering, | |
929 | .maxlen = sizeof(int), | |
930 | .mode = 0644, | |
931 | .proc_handler = proc_dointvec | |
932 | }, | |
ae5c3f40 NB |
933 | { |
934 | .procname = "tcp_retries1", | |
935 | .data = &init_net.ipv4.sysctl_tcp_retries1, | |
936 | .maxlen = sizeof(int), | |
937 | .mode = 0644, | |
938 | .proc_handler = proc_dointvec_minmax, | |
939 | .extra2 = &tcp_retr1_max | |
940 | }, | |
c6214a97 NB |
941 | { |
942 | .procname = "tcp_retries2", | |
943 | .data = &init_net.ipv4.sysctl_tcp_retries2, | |
944 | .maxlen = sizeof(int), | |
945 | .mode = 0644, | |
946 | .proc_handler = proc_dointvec | |
947 | }, | |
c402d9be NB |
948 | { |
949 | .procname = "tcp_orphan_retries", | |
950 | .data = &init_net.ipv4.sysctl_tcp_orphan_retries, | |
951 | .maxlen = sizeof(int), | |
952 | .mode = 0644, | |
953 | .proc_handler = proc_dointvec | |
954 | }, | |
1e579caa NB |
955 | { |
956 | .procname = "tcp_fin_timeout", | |
957 | .data = &init_net.ipv4.sysctl_tcp_fin_timeout, | |
958 | .maxlen = sizeof(int), | |
959 | .mode = 0644, | |
960 | .proc_handler = proc_dointvec_jiffies, | |
961 | }, | |
4979f2d9 NB |
962 | { |
963 | .procname = "tcp_notsent_lowat", | |
964 | .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, | |
965 | .maxlen = sizeof(unsigned int), | |
966 | .mode = 0644, | |
b007f090 | 967 | .proc_handler = proc_douintvec, |
4979f2d9 | 968 | }, |
56ab6b93 HY |
969 | { |
970 | .procname = "tcp_tw_reuse", | |
971 | .data = &init_net.ipv4.sysctl_tcp_tw_reuse, | |
972 | .maxlen = sizeof(int), | |
973 | .mode = 0644, | |
974 | .proc_handler = proc_dointvec | |
975 | }, | |
1946e672 HY |
976 | { |
977 | .procname = "tcp_max_tw_buckets", | |
978 | .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, | |
979 | .maxlen = sizeof(int), | |
980 | .mode = 0644, | |
981 | .proc_handler = proc_dointvec | |
982 | }, | |
983 | { | |
984 | .procname = "tcp_tw_recycle", | |
985 | .data = &init_net.ipv4.tcp_death_row.sysctl_tw_recycle, | |
986 | .maxlen = sizeof(int), | |
987 | .mode = 0644, | |
988 | .proc_handler = proc_dointvec | |
989 | }, | |
fee83d09 HY |
990 | { |
991 | .procname = "tcp_max_syn_backlog", | |
992 | .data = &init_net.ipv4.sysctl_max_syn_backlog, | |
993 | .maxlen = sizeof(int), | |
994 | .mode = 0644, | |
995 | .proc_handler = proc_dointvec | |
996 | }, | |
a6db4494 DA |
997 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
998 | { | |
999 | .procname = "fib_multipath_use_neigh", | |
1000 | .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, | |
1001 | .maxlen = sizeof(int), | |
1002 | .mode = 0644, | |
1003 | .proc_handler = proc_dointvec_minmax, | |
1004 | .extra1 = &zero, | |
1005 | .extra2 = &one, | |
1006 | }, | |
1007 | #endif | |
4548b683 KJ |
1008 | { |
1009 | .procname = "ip_unprivileged_port_start", | |
1010 | .maxlen = sizeof(int), | |
1011 | .data = &init_net.ipv4.sysctl_ip_prot_sock, | |
1012 | .mode = 0644, | |
1013 | .proc_handler = ipv4_privileged_ports, | |
1014 | }, | |
68528f09 PE |
1015 | { } |
1016 | }; | |
1017 | ||
1577519d PE |
1018 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
1019 | { | |
68528f09 PE |
1020 | struct ctl_table *table; |
1021 | ||
1022 | table = ipv4_net_table; | |
09ad9bc7 | 1023 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
1024 | int i; |
1025 | ||
68528f09 | 1026 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
51456b29 | 1027 | if (!table) |
68528f09 PE |
1028 | goto err_alloc; |
1029 | ||
0a6fa23d EB |
1030 | /* Update the variables to point into the current struct net */ |
1031 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
1032 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
1033 | } |
1034 | ||
ec8f23ce | 1035 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
51456b29 | 1036 | if (!net->ipv4.ipv4_hdr) |
68528f09 PE |
1037 | goto err_reg; |
1038 | ||
122ff243 WC |
1039 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
1040 | if (!net->ipv4.sysctl_local_reserved_ports) | |
1041 | goto err_ports; | |
1042 | ||
1577519d | 1043 | return 0; |
68528f09 | 1044 | |
122ff243 WC |
1045 | err_ports: |
1046 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 1047 | err_reg: |
09ad9bc7 | 1048 | if (!net_eq(net, &init_net)) |
68528f09 PE |
1049 | kfree(table); |
1050 | err_alloc: | |
1051 | return -ENOMEM; | |
1577519d PE |
1052 | } |
1053 | ||
1054 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
1055 | { | |
68528f09 PE |
1056 | struct ctl_table *table; |
1057 | ||
122ff243 | 1058 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
1059 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
1060 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
1061 | kfree(table); | |
1577519d PE |
1062 | } |
1063 | ||
1064 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
1065 | .init = ipv4_sysctl_init_net, | |
1066 | .exit = ipv4_sysctl_exit_net, | |
1067 | }; | |
1068 | ||
3e37c3f9 PE |
1069 | static __init int sysctl_ipv4_init(void) |
1070 | { | |
1071 | struct ctl_table_header *hdr; | |
1072 | ||
ec8f23ce | 1073 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
51456b29 | 1074 | if (!hdr) |
1577519d PE |
1075 | return -ENOMEM; |
1076 | ||
1077 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 1078 | unregister_net_sysctl_table(hdr); |
1577519d PE |
1079 | return -ENOMEM; |
1080 | } | |
1081 | ||
1082 | return 0; | |
3e37c3f9 PE |
1083 | } |
1084 | ||
1085 | __initcall(sysctl_ipv4_init); |