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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> |
3aaabe23 | 27 | #include <net/tcp_memcontrol.h> |
1da177e4 | 28 | |
89cee8b1 | 29 | static int zero; |
cdda8891 | 30 | static int one = 1; |
6ba8a3b1 | 31 | static int four = 4; |
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; | |
249fab77 ED |
38 | static int ip_ttl_min = 1; |
39 | static int ip_ttl_max = 255; | |
651e9271 MT |
40 | static int tcp_syn_retries_min = 1; |
41 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; | |
c319b4d7 VK |
42 | static int ip_ping_group_range_min[] = { 0, 0 }; |
43 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
8133534c SD |
44 | static int min_sndbuf = SOCK_MIN_SNDBUF; |
45 | static int min_rcvbuf = SOCK_MIN_RCVBUF; | |
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 | ||
c9d8f1a6 | 52 | write_seqlock(&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]; | |
59 | write_sequnlock(&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) { | |
a25de534 | 84 | if (range[1] < range[0]) |
227b60f5 SH |
85 | ret = -EINVAL; |
86 | else | |
0bbf87d8 | 87 | set_local_port_range(net, range); |
227b60f5 SH |
88 | } |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
c319b4d7 | 93 | |
7064d16e | 94 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 95 | { |
7064d16e | 96 | kgid_t *data = table->data; |
0bbf87d8 | 97 | struct net *net = |
ba6b918a | 98 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 99 | unsigned int seq; |
c319b4d7 | 100 | do { |
c9d8f1a6 | 101 | seq = read_seqbegin(&net->ipv4.ip_local_ports.lock); |
c319b4d7 VK |
102 | |
103 | *low = data[0]; | |
104 | *high = data[1]; | |
c9d8f1a6 | 105 | } while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq)); |
c319b4d7 VK |
106 | } |
107 | ||
108 | /* Update system visible IP port range */ | |
7064d16e | 109 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 110 | { |
7064d16e | 111 | kgid_t *data = table->data; |
0bbf87d8 | 112 | struct net *net = |
ba6b918a | 113 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
c9d8f1a6 | 114 | write_seqlock(&net->ipv4.ip_local_ports.lock); |
7064d16e EB |
115 | data[0] = low; |
116 | data[1] = high; | |
c9d8f1a6 | 117 | write_sequnlock(&net->ipv4.ip_local_ports.lock); |
c319b4d7 VK |
118 | } |
119 | ||
120 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 121 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
122 | void __user *buffer, |
123 | size_t *lenp, loff_t *ppos) | |
124 | { | |
7064d16e | 125 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 126 | int ret; |
7064d16e EB |
127 | gid_t urange[2]; |
128 | kgid_t low, high; | |
fe2c6338 | 129 | struct ctl_table tmp = { |
7064d16e EB |
130 | .data = &urange, |
131 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
132 | .mode = table->mode, |
133 | .extra1 = &ip_ping_group_range_min, | |
134 | .extra2 = &ip_ping_group_range_max, | |
135 | }; | |
136 | ||
7064d16e EB |
137 | inet_get_ping_group_range_table(table, &low, &high); |
138 | urange[0] = from_kgid_munged(user_ns, low); | |
139 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
140 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
141 | ||
7064d16e EB |
142 | if (write && ret == 0) { |
143 | low = make_kgid(user_ns, urange[0]); | |
144 | high = make_kgid(user_ns, urange[1]); | |
145 | if (!gid_valid(low) || !gid_valid(high) || | |
146 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
147 | low = make_kgid(&init_user_ns, 1); | |
148 | high = make_kgid(&init_user_ns, 0); | |
149 | } | |
150 | set_ping_group_range(table, low, high); | |
151 | } | |
c319b4d7 VK |
152 | |
153 | return ret; | |
154 | } | |
155 | ||
fe2c6338 | 156 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
157 | void __user *buffer, size_t *lenp, loff_t *ppos) |
158 | { | |
159 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 160 | struct ctl_table tbl = { |
317a76f9 SH |
161 | .data = val, |
162 | .maxlen = TCP_CA_NAME_MAX, | |
163 | }; | |
164 | int ret; | |
165 | ||
166 | tcp_get_default_congestion_control(val); | |
167 | ||
8d65af78 | 168 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
169 | if (write && ret == 0) |
170 | ret = tcp_set_default_congestion_control(val); | |
171 | return ret; | |
172 | } | |
173 | ||
fe2c6338 | 174 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 175 | int write, |
3ff825b2 SH |
176 | void __user *buffer, size_t *lenp, |
177 | loff_t *ppos) | |
178 | { | |
fe2c6338 | 179 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
180 | int ret; |
181 | ||
182 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
183 | if (!tbl.data) | |
184 | return -ENOMEM; | |
185 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 186 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
187 | kfree(tbl.data); |
188 | return ret; | |
189 | } | |
190 | ||
fe2c6338 | 191 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 192 | int write, |
ce7bc3bf SH |
193 | void __user *buffer, size_t *lenp, |
194 | loff_t *ppos) | |
195 | { | |
fe2c6338 | 196 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
197 | int ret; |
198 | ||
199 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
200 | if (!tbl.data) | |
201 | return -ENOMEM; | |
202 | ||
203 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 204 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
205 | if (write && ret == 0) |
206 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
207 | kfree(tbl.data); | |
208 | return ret; | |
209 | } | |
210 | ||
fe2c6338 JP |
211 | static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write, |
212 | void __user *buffer, size_t *lenp, | |
213 | loff_t *ppos) | |
10467163 | 214 | { |
fe2c6338 | 215 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
216 | struct tcp_fastopen_context *ctxt; |
217 | int ret; | |
218 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
219 | ||
220 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
221 | if (!tbl.data) | |
222 | return -ENOMEM; | |
223 | ||
224 | rcu_read_lock(); | |
225 | ctxt = rcu_dereference(tcp_fastopen_ctx); | |
226 | if (ctxt) | |
227 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
228 | else |
229 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
230 | rcu_read_unlock(); |
231 | ||
232 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
233 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
234 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
235 | ||
236 | if (write && ret == 0) { | |
237 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
238 | user_key + 2, user_key + 3) != 4) { | |
239 | ret = -EINVAL; | |
240 | goto bad_key; | |
241 | } | |
222e83d2 HFS |
242 | /* Generate a dummy secret but don't publish it. This |
243 | * is needed so we don't regenerate a new key on the | |
244 | * first invocation of tcp_fastopen_cookie_gen | |
245 | */ | |
246 | tcp_fastopen_init_key_once(false); | |
10467163 JC |
247 | tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH); |
248 | } | |
249 | ||
250 | bad_key: | |
251 | pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", | |
252 | user_key[0], user_key[1], user_key[2], user_key[3], | |
253 | (char *)tbl.data, ret); | |
254 | kfree(tbl.data); | |
255 | return ret; | |
256 | } | |
257 | ||
3e37c3f9 | 258 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 259 | { |
1da177e4 LT |
260 | .procname = "tcp_timestamps", |
261 | .data = &sysctl_tcp_timestamps, | |
262 | .maxlen = sizeof(int), | |
263 | .mode = 0644, | |
6d9f239a | 264 | .proc_handler = proc_dointvec |
1da177e4 | 265 | }, |
e905a9ed | 266 | { |
1da177e4 LT |
267 | .procname = "tcp_window_scaling", |
268 | .data = &sysctl_tcp_window_scaling, | |
269 | .maxlen = sizeof(int), | |
270 | .mode = 0644, | |
6d9f239a | 271 | .proc_handler = proc_dointvec |
1da177e4 | 272 | }, |
e905a9ed | 273 | { |
1da177e4 LT |
274 | .procname = "tcp_sack", |
275 | .data = &sysctl_tcp_sack, | |
276 | .maxlen = sizeof(int), | |
277 | .mode = 0644, | |
6d9f239a | 278 | .proc_handler = proc_dointvec |
1da177e4 | 279 | }, |
e905a9ed | 280 | { |
1da177e4 LT |
281 | .procname = "tcp_retrans_collapse", |
282 | .data = &sysctl_tcp_retrans_collapse, | |
283 | .maxlen = sizeof(int), | |
284 | .mode = 0644, | |
6d9f239a | 285 | .proc_handler = proc_dointvec |
1da177e4 | 286 | }, |
e905a9ed | 287 | { |
1da177e4 | 288 | .procname = "ip_default_ttl", |
e905a9ed | 289 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
290 | .maxlen = sizeof(int), |
291 | .mode = 0644, | |
249fab77 ED |
292 | .proc_handler = proc_dointvec_minmax, |
293 | .extra1 = &ip_ttl_min, | |
294 | .extra2 = &ip_ttl_max, | |
1da177e4 | 295 | }, |
1da177e4 | 296 | { |
1da177e4 LT |
297 | .procname = "tcp_syn_retries", |
298 | .data = &sysctl_tcp_syn_retries, | |
299 | .maxlen = sizeof(int), | |
300 | .mode = 0644, | |
651e9271 MT |
301 | .proc_handler = proc_dointvec_minmax, |
302 | .extra1 = &tcp_syn_retries_min, | |
303 | .extra2 = &tcp_syn_retries_max | |
1da177e4 LT |
304 | }, |
305 | { | |
1da177e4 LT |
306 | .procname = "tcp_synack_retries", |
307 | .data = &sysctl_tcp_synack_retries, | |
308 | .maxlen = sizeof(int), | |
309 | .mode = 0644, | |
6d9f239a | 310 | .proc_handler = proc_dointvec |
1da177e4 LT |
311 | }, |
312 | { | |
1da177e4 LT |
313 | .procname = "tcp_max_orphans", |
314 | .data = &sysctl_tcp_max_orphans, | |
315 | .maxlen = sizeof(int), | |
316 | .mode = 0644, | |
6d9f239a | 317 | .proc_handler = proc_dointvec |
1da177e4 LT |
318 | }, |
319 | { | |
1da177e4 | 320 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 321 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
322 | .maxlen = sizeof(int), |
323 | .mode = 0644, | |
6d9f239a | 324 | .proc_handler = proc_dointvec |
1da177e4 | 325 | }, |
6648bd7e AD |
326 | { |
327 | .procname = "ip_early_demux", | |
328 | .data = &sysctl_ip_early_demux, | |
329 | .maxlen = sizeof(int), | |
330 | .mode = 0644, | |
331 | .proc_handler = proc_dointvec | |
332 | }, | |
1da177e4 | 333 | { |
1da177e4 LT |
334 | .procname = "ip_dynaddr", |
335 | .data = &sysctl_ip_dynaddr, | |
336 | .maxlen = sizeof(int), | |
337 | .mode = 0644, | |
6d9f239a | 338 | .proc_handler = proc_dointvec |
1da177e4 | 339 | }, |
1da177e4 | 340 | { |
1da177e4 LT |
341 | .procname = "tcp_keepalive_time", |
342 | .data = &sysctl_tcp_keepalive_time, | |
343 | .maxlen = sizeof(int), | |
344 | .mode = 0644, | |
6d9f239a | 345 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
346 | }, |
347 | { | |
1da177e4 LT |
348 | .procname = "tcp_keepalive_probes", |
349 | .data = &sysctl_tcp_keepalive_probes, | |
350 | .maxlen = sizeof(int), | |
351 | .mode = 0644, | |
6d9f239a | 352 | .proc_handler = proc_dointvec |
1da177e4 LT |
353 | }, |
354 | { | |
1da177e4 LT |
355 | .procname = "tcp_keepalive_intvl", |
356 | .data = &sysctl_tcp_keepalive_intvl, | |
357 | .maxlen = sizeof(int), | |
358 | .mode = 0644, | |
6d9f239a | 359 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
360 | }, |
361 | { | |
1da177e4 LT |
362 | .procname = "tcp_retries1", |
363 | .data = &sysctl_tcp_retries1, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
6d9f239a | 366 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
367 | .extra2 = &tcp_retr1_max |
368 | }, | |
369 | { | |
1da177e4 LT |
370 | .procname = "tcp_retries2", |
371 | .data = &sysctl_tcp_retries2, | |
372 | .maxlen = sizeof(int), | |
373 | .mode = 0644, | |
6d9f239a | 374 | .proc_handler = proc_dointvec |
1da177e4 LT |
375 | }, |
376 | { | |
1da177e4 LT |
377 | .procname = "tcp_fin_timeout", |
378 | .data = &sysctl_tcp_fin_timeout, | |
379 | .maxlen = sizeof(int), | |
380 | .mode = 0644, | |
6d9f239a | 381 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
382 | }, |
383 | #ifdef CONFIG_SYN_COOKIES | |
384 | { | |
1da177e4 LT |
385 | .procname = "tcp_syncookies", |
386 | .data = &sysctl_tcp_syncookies, | |
387 | .maxlen = sizeof(int), | |
388 | .mode = 0644, | |
6d9f239a | 389 | .proc_handler = proc_dointvec |
1da177e4 LT |
390 | }, |
391 | #endif | |
2100c8d2 YC |
392 | { |
393 | .procname = "tcp_fastopen", | |
394 | .data = &sysctl_tcp_fastopen, | |
395 | .maxlen = sizeof(int), | |
396 | .mode = 0644, | |
397 | .proc_handler = proc_dointvec, | |
398 | }, | |
10467163 JC |
399 | { |
400 | .procname = "tcp_fastopen_key", | |
401 | .mode = 0600, | |
402 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
403 | .proc_handler = proc_tcp_fastopen_key, | |
404 | }, | |
1da177e4 | 405 | { |
1da177e4 | 406 | .procname = "tcp_tw_recycle", |
295ff7ed | 407 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
408 | .maxlen = sizeof(int), |
409 | .mode = 0644, | |
6d9f239a | 410 | .proc_handler = proc_dointvec |
1da177e4 LT |
411 | }, |
412 | { | |
1da177e4 LT |
413 | .procname = "tcp_abort_on_overflow", |
414 | .data = &sysctl_tcp_abort_on_overflow, | |
415 | .maxlen = sizeof(int), | |
416 | .mode = 0644, | |
6d9f239a | 417 | .proc_handler = proc_dointvec |
1da177e4 LT |
418 | }, |
419 | { | |
1da177e4 LT |
420 | .procname = "tcp_stdurg", |
421 | .data = &sysctl_tcp_stdurg, | |
422 | .maxlen = sizeof(int), | |
423 | .mode = 0644, | |
6d9f239a | 424 | .proc_handler = proc_dointvec |
1da177e4 LT |
425 | }, |
426 | { | |
1da177e4 LT |
427 | .procname = "tcp_rfc1337", |
428 | .data = &sysctl_tcp_rfc1337, | |
429 | .maxlen = sizeof(int), | |
430 | .mode = 0644, | |
6d9f239a | 431 | .proc_handler = proc_dointvec |
1da177e4 LT |
432 | }, |
433 | { | |
1da177e4 LT |
434 | .procname = "tcp_max_syn_backlog", |
435 | .data = &sysctl_max_syn_backlog, | |
436 | .maxlen = sizeof(int), | |
437 | .mode = 0644, | |
6d9f239a | 438 | .proc_handler = proc_dointvec |
1da177e4 | 439 | }, |
1da177e4 | 440 | { |
1da177e4 LT |
441 | .procname = "igmp_max_memberships", |
442 | .data = &sysctl_igmp_max_memberships, | |
443 | .maxlen = sizeof(int), | |
444 | .mode = 0644, | |
6d9f239a | 445 | .proc_handler = proc_dointvec |
1da177e4 | 446 | }, |
1da177e4 | 447 | { |
1da177e4 LT |
448 | .procname = "igmp_max_msf", |
449 | .data = &sysctl_igmp_max_msf, | |
450 | .maxlen = sizeof(int), | |
451 | .mode = 0644, | |
6d9f239a | 452 | .proc_handler = proc_dointvec |
1da177e4 | 453 | }, |
a9fe8e29 HFS |
454 | #ifdef CONFIG_IP_MULTICAST |
455 | { | |
456 | .procname = "igmp_qrv", | |
457 | .data = &sysctl_igmp_qrv, | |
458 | .maxlen = sizeof(int), | |
459 | .mode = 0644, | |
460 | .proc_handler = proc_dointvec_minmax, | |
461 | .extra1 = &one | |
462 | }, | |
463 | #endif | |
1da177e4 | 464 | { |
1da177e4 LT |
465 | .procname = "inet_peer_threshold", |
466 | .data = &inet_peer_threshold, | |
467 | .maxlen = sizeof(int), | |
468 | .mode = 0644, | |
6d9f239a | 469 | .proc_handler = proc_dointvec |
1da177e4 LT |
470 | }, |
471 | { | |
1da177e4 LT |
472 | .procname = "inet_peer_minttl", |
473 | .data = &inet_peer_minttl, | |
474 | .maxlen = sizeof(int), | |
475 | .mode = 0644, | |
6d9f239a | 476 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
477 | }, |
478 | { | |
1da177e4 LT |
479 | .procname = "inet_peer_maxttl", |
480 | .data = &inet_peer_maxttl, | |
481 | .maxlen = sizeof(int), | |
482 | .mode = 0644, | |
6d9f239a | 483 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 484 | }, |
1da177e4 | 485 | { |
1da177e4 LT |
486 | .procname = "tcp_orphan_retries", |
487 | .data = &sysctl_tcp_orphan_retries, | |
488 | .maxlen = sizeof(int), | |
489 | .mode = 0644, | |
6d9f239a | 490 | .proc_handler = proc_dointvec |
1da177e4 LT |
491 | }, |
492 | { | |
1da177e4 LT |
493 | .procname = "tcp_fack", |
494 | .data = &sysctl_tcp_fack, | |
495 | .maxlen = sizeof(int), | |
496 | .mode = 0644, | |
6d9f239a | 497 | .proc_handler = proc_dointvec |
1da177e4 LT |
498 | }, |
499 | { | |
1da177e4 LT |
500 | .procname = "tcp_reordering", |
501 | .data = &sysctl_tcp_reordering, | |
502 | .maxlen = sizeof(int), | |
503 | .mode = 0644, | |
6d9f239a | 504 | .proc_handler = proc_dointvec |
1da177e4 | 505 | }, |
dca145ff ED |
506 | { |
507 | .procname = "tcp_max_reordering", | |
508 | .data = &sysctl_tcp_max_reordering, | |
509 | .maxlen = sizeof(int), | |
510 | .mode = 0644, | |
511 | .proc_handler = proc_dointvec | |
512 | }, | |
1da177e4 | 513 | { |
1da177e4 LT |
514 | .procname = "tcp_dsack", |
515 | .data = &sysctl_tcp_dsack, | |
516 | .maxlen = sizeof(int), | |
517 | .mode = 0644, | |
6d9f239a | 518 | .proc_handler = proc_dointvec |
1da177e4 | 519 | }, |
a4fe34bf EB |
520 | { |
521 | .procname = "tcp_mem", | |
522 | .maxlen = sizeof(sysctl_tcp_mem), | |
523 | .data = &sysctl_tcp_mem, | |
524 | .mode = 0644, | |
525 | .proc_handler = proc_doulongvec_minmax, | |
526 | }, | |
1da177e4 | 527 | { |
1da177e4 LT |
528 | .procname = "tcp_wmem", |
529 | .data = &sysctl_tcp_wmem, | |
530 | .maxlen = sizeof(sysctl_tcp_wmem), | |
531 | .mode = 0644, | |
cdda8891 | 532 | .proc_handler = proc_dointvec_minmax, |
8133534c | 533 | .extra1 = &min_sndbuf, |
1da177e4 | 534 | }, |
c9bee3b7 ED |
535 | { |
536 | .procname = "tcp_notsent_lowat", | |
537 | .data = &sysctl_tcp_notsent_lowat, | |
538 | .maxlen = sizeof(sysctl_tcp_notsent_lowat), | |
539 | .mode = 0644, | |
540 | .proc_handler = proc_dointvec, | |
541 | }, | |
1da177e4 | 542 | { |
1da177e4 LT |
543 | .procname = "tcp_rmem", |
544 | .data = &sysctl_tcp_rmem, | |
545 | .maxlen = sizeof(sysctl_tcp_rmem), | |
546 | .mode = 0644, | |
cdda8891 | 547 | .proc_handler = proc_dointvec_minmax, |
8133534c | 548 | .extra1 = &min_rcvbuf, |
1da177e4 LT |
549 | }, |
550 | { | |
1da177e4 LT |
551 | .procname = "tcp_app_win", |
552 | .data = &sysctl_tcp_app_win, | |
553 | .maxlen = sizeof(int), | |
554 | .mode = 0644, | |
6d9f239a | 555 | .proc_handler = proc_dointvec |
1da177e4 LT |
556 | }, |
557 | { | |
1da177e4 LT |
558 | .procname = "tcp_adv_win_scale", |
559 | .data = &sysctl_tcp_adv_win_scale, | |
560 | .maxlen = sizeof(int), | |
561 | .mode = 0644, | |
0147fc05 AD |
562 | .proc_handler = proc_dointvec_minmax, |
563 | .extra1 = &tcp_adv_win_scale_min, | |
564 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 565 | }, |
1da177e4 | 566 | { |
1da177e4 LT |
567 | .procname = "tcp_tw_reuse", |
568 | .data = &sysctl_tcp_tw_reuse, | |
569 | .maxlen = sizeof(int), | |
570 | .mode = 0644, | |
6d9f239a | 571 | .proc_handler = proc_dointvec |
1da177e4 LT |
572 | }, |
573 | { | |
1da177e4 LT |
574 | .procname = "tcp_frto", |
575 | .data = &sysctl_tcp_frto, | |
576 | .maxlen = sizeof(int), | |
577 | .mode = 0644, | |
6d9f239a | 578 | .proc_handler = proc_dointvec |
1da177e4 LT |
579 | }, |
580 | { | |
1da177e4 LT |
581 | .procname = "tcp_low_latency", |
582 | .data = &sysctl_tcp_low_latency, | |
583 | .maxlen = sizeof(int), | |
584 | .mode = 0644, | |
6d9f239a | 585 | .proc_handler = proc_dointvec |
1da177e4 | 586 | }, |
1da177e4 | 587 | { |
1da177e4 LT |
588 | .procname = "tcp_no_metrics_save", |
589 | .data = &sysctl_tcp_nometrics_save, | |
590 | .maxlen = sizeof(int), | |
591 | .mode = 0644, | |
6d9f239a | 592 | .proc_handler = proc_dointvec, |
1da177e4 | 593 | }, |
1da177e4 | 594 | { |
1da177e4 LT |
595 | .procname = "tcp_moderate_rcvbuf", |
596 | .data = &sysctl_tcp_moderate_rcvbuf, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
6d9f239a | 599 | .proc_handler = proc_dointvec, |
1da177e4 LT |
600 | }, |
601 | { | |
1da177e4 LT |
602 | .procname = "tcp_tso_win_divisor", |
603 | .data = &sysctl_tcp_tso_win_divisor, | |
604 | .maxlen = sizeof(int), | |
605 | .mode = 0644, | |
6d9f239a | 606 | .proc_handler = proc_dointvec, |
1da177e4 LT |
607 | }, |
608 | { | |
317a76f9 | 609 | .procname = "tcp_congestion_control", |
1da177e4 | 610 | .mode = 0644, |
317a76f9 | 611 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 612 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 613 | }, |
e905a9ed | 614 | { |
15d99e02 RJ |
615 | .procname = "tcp_workaround_signed_windows", |
616 | .data = &sysctl_tcp_workaround_signed_windows, | |
617 | .maxlen = sizeof(int), | |
618 | .mode = 0644, | |
6d9f239a | 619 | .proc_handler = proc_dointvec |
15d99e02 | 620 | }, |
46d3ceab ED |
621 | { |
622 | .procname = "tcp_limit_output_bytes", | |
623 | .data = &sysctl_tcp_limit_output_bytes, | |
624 | .maxlen = sizeof(int), | |
625 | .mode = 0644, | |
626 | .proc_handler = proc_dointvec | |
627 | }, | |
282f23c6 ED |
628 | { |
629 | .procname = "tcp_challenge_ack_limit", | |
630 | .data = &sysctl_tcp_challenge_ack_limit, | |
631 | .maxlen = sizeof(int), | |
632 | .mode = 0644, | |
633 | .proc_handler = proc_dointvec | |
634 | }, | |
35089bb2 | 635 | { |
35089bb2 DM |
636 | .procname = "tcp_slow_start_after_idle", |
637 | .data = &sysctl_tcp_slow_start_after_idle, | |
638 | .maxlen = sizeof(int), | |
639 | .mode = 0644, | |
6d9f239a | 640 | .proc_handler = proc_dointvec |
35089bb2 | 641 | }, |
446fda4f PM |
642 | #ifdef CONFIG_NETLABEL |
643 | { | |
446fda4f PM |
644 | .procname = "cipso_cache_enable", |
645 | .data = &cipso_v4_cache_enabled, | |
646 | .maxlen = sizeof(int), | |
647 | .mode = 0644, | |
6d9f239a | 648 | .proc_handler = proc_dointvec, |
446fda4f PM |
649 | }, |
650 | { | |
446fda4f PM |
651 | .procname = "cipso_cache_bucket_size", |
652 | .data = &cipso_v4_cache_bucketsize, | |
653 | .maxlen = sizeof(int), | |
654 | .mode = 0644, | |
6d9f239a | 655 | .proc_handler = proc_dointvec, |
446fda4f PM |
656 | }, |
657 | { | |
446fda4f PM |
658 | .procname = "cipso_rbm_optfmt", |
659 | .data = &cipso_v4_rbm_optfmt, | |
660 | .maxlen = sizeof(int), | |
661 | .mode = 0644, | |
6d9f239a | 662 | .proc_handler = proc_dointvec, |
446fda4f PM |
663 | }, |
664 | { | |
446fda4f PM |
665 | .procname = "cipso_rbm_strictvalid", |
666 | .data = &cipso_v4_rbm_strictvalid, | |
667 | .maxlen = sizeof(int), | |
668 | .mode = 0644, | |
6d9f239a | 669 | .proc_handler = proc_dointvec, |
446fda4f PM |
670 | }, |
671 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 672 | { |
3ff825b2 SH |
673 | .procname = "tcp_available_congestion_control", |
674 | .maxlen = TCP_CA_BUF_MAX, | |
675 | .mode = 0444, | |
6d9f239a | 676 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 677 | }, |
ce7bc3bf | 678 | { |
ce7bc3bf SH |
679 | .procname = "tcp_allowed_congestion_control", |
680 | .maxlen = TCP_CA_BUF_MAX, | |
681 | .mode = 0644, | |
6d9f239a | 682 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 683 | }, |
36e31b0a AP |
684 | { |
685 | .procname = "tcp_thin_linear_timeouts", | |
686 | .data = &sysctl_tcp_thin_linear_timeouts, | |
687 | .maxlen = sizeof(int), | |
688 | .mode = 0644, | |
689 | .proc_handler = proc_dointvec | |
690 | }, | |
5797deb6 | 691 | { |
7e380175 AP |
692 | .procname = "tcp_thin_dupack", |
693 | .data = &sysctl_tcp_thin_dupack, | |
694 | .maxlen = sizeof(int), | |
695 | .mode = 0644, | |
696 | .proc_handler = proc_dointvec | |
697 | }, | |
eed530b6 YC |
698 | { |
699 | .procname = "tcp_early_retrans", | |
700 | .data = &sysctl_tcp_early_retrans, | |
701 | .maxlen = sizeof(int), | |
702 | .mode = 0644, | |
703 | .proc_handler = proc_dointvec_minmax, | |
704 | .extra1 = &zero, | |
6ba8a3b1 | 705 | .extra2 = &four, |
eed530b6 | 706 | }, |
95bd09eb ED |
707 | { |
708 | .procname = "tcp_min_tso_segs", | |
709 | .data = &sysctl_tcp_min_tso_segs, | |
710 | .maxlen = sizeof(int), | |
711 | .mode = 0644, | |
712 | .proc_handler = proc_dointvec_minmax, | |
d6a4e26a | 713 | .extra1 = &one, |
95bd09eb ED |
714 | .extra2 = &gso_max_segs, |
715 | }, | |
f54b3111 ED |
716 | { |
717 | .procname = "tcp_autocorking", | |
718 | .data = &sysctl_tcp_autocorking, | |
719 | .maxlen = sizeof(int), | |
720 | .mode = 0644, | |
721 | .proc_handler = proc_dointvec_minmax, | |
722 | .extra1 = &zero, | |
723 | .extra2 = &one, | |
724 | }, | |
032ee423 NC |
725 | { |
726 | .procname = "tcp_invalid_ratelimit", | |
727 | .data = &sysctl_tcp_invalid_ratelimit, | |
728 | .maxlen = sizeof(int), | |
729 | .mode = 0644, | |
730 | .proc_handler = proc_dointvec_ms_jiffies, | |
731 | }, | |
4cdf507d ED |
732 | { |
733 | .procname = "icmp_msgs_per_sec", | |
734 | .data = &sysctl_icmp_msgs_per_sec, | |
735 | .maxlen = sizeof(int), | |
736 | .mode = 0644, | |
737 | .proc_handler = proc_dointvec_minmax, | |
738 | .extra1 = &zero, | |
739 | }, | |
740 | { | |
741 | .procname = "icmp_msgs_burst", | |
742 | .data = &sysctl_icmp_msgs_burst, | |
743 | .maxlen = sizeof(int), | |
744 | .mode = 0644, | |
745 | .proc_handler = proc_dointvec_minmax, | |
746 | .extra1 = &zero, | |
747 | }, | |
95766fff | 748 | { |
95766fff HA |
749 | .procname = "udp_mem", |
750 | .data = &sysctl_udp_mem, | |
751 | .maxlen = sizeof(sysctl_udp_mem), | |
752 | .mode = 0644, | |
8d987e5c | 753 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
754 | }, |
755 | { | |
95766fff HA |
756 | .procname = "udp_rmem_min", |
757 | .data = &sysctl_udp_rmem_min, | |
758 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
759 | .mode = 0644, | |
6d9f239a | 760 | .proc_handler = proc_dointvec_minmax, |
8133534c | 761 | .extra1 = &min_rcvbuf, |
95766fff HA |
762 | }, |
763 | { | |
95766fff HA |
764 | .procname = "udp_wmem_min", |
765 | .data = &sysctl_udp_wmem_min, | |
766 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
767 | .mode = 0644, | |
6d9f239a | 768 | .proc_handler = proc_dointvec_minmax, |
8133534c | 769 | .extra1 = &min_sndbuf, |
95766fff | 770 | }, |
f8572d8f | 771 | { } |
1da177e4 | 772 | }; |
3e37c3f9 | 773 | |
68528f09 PE |
774 | static struct ctl_table ipv4_net_table[] = { |
775 | { | |
68528f09 PE |
776 | .procname = "icmp_echo_ignore_all", |
777 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
778 | .maxlen = sizeof(int), | |
779 | .mode = 0644, | |
6d9f239a | 780 | .proc_handler = proc_dointvec |
68528f09 PE |
781 | }, |
782 | { | |
68528f09 PE |
783 | .procname = "icmp_echo_ignore_broadcasts", |
784 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
785 | .maxlen = sizeof(int), | |
786 | .mode = 0644, | |
6d9f239a | 787 | .proc_handler = proc_dointvec |
68528f09 PE |
788 | }, |
789 | { | |
68528f09 PE |
790 | .procname = "icmp_ignore_bogus_error_responses", |
791 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
792 | .maxlen = sizeof(int), | |
793 | .mode = 0644, | |
6d9f239a | 794 | .proc_handler = proc_dointvec |
68528f09 PE |
795 | }, |
796 | { | |
68528f09 PE |
797 | .procname = "icmp_errors_use_inbound_ifaddr", |
798 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
799 | .maxlen = sizeof(int), | |
800 | .mode = 0644, | |
6d9f239a | 801 | .proc_handler = proc_dointvec |
68528f09 PE |
802 | }, |
803 | { | |
68528f09 PE |
804 | .procname = "icmp_ratelimit", |
805 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
806 | .maxlen = sizeof(int), | |
807 | .mode = 0644, | |
6d9f239a | 808 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
809 | }, |
810 | { | |
68528f09 PE |
811 | .procname = "icmp_ratemask", |
812 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
813 | .maxlen = sizeof(int), | |
814 | .mode = 0644, | |
6d9f239a | 815 | .proc_handler = proc_dointvec |
68528f09 | 816 | }, |
c319b4d7 VK |
817 | { |
818 | .procname = "ping_group_range", | |
ba6b918a | 819 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 820 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
821 | .mode = 0644, |
822 | .proc_handler = ipv4_ping_group_range, | |
823 | }, | |
5d134f1c HFS |
824 | { |
825 | .procname = "tcp_ecn", | |
826 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
827 | .maxlen = sizeof(int), | |
828 | .mode = 0644, | |
829 | .proc_handler = proc_dointvec | |
830 | }, | |
49213555 DB |
831 | { |
832 | .procname = "tcp_ecn_fallback", | |
833 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
834 | .maxlen = sizeof(int), | |
835 | .mode = 0644, | |
836 | .proc_handler = proc_dointvec | |
837 | }, | |
0bbf87d8 EB |
838 | { |
839 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
840 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
841 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
842 | .mode = 0644, |
843 | .proc_handler = ipv4_local_port_range, | |
844 | }, | |
122ff243 WC |
845 | { |
846 | .procname = "ip_local_reserved_ports", | |
847 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
848 | .maxlen = 65536, | |
849 | .mode = 0644, | |
850 | .proc_handler = proc_do_large_bitmap, | |
851 | }, | |
974eda11 HFS |
852 | { |
853 | .procname = "ip_no_pmtu_disc", | |
854 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
855 | .maxlen = sizeof(int), | |
856 | .mode = 0644, | |
857 | .proc_handler = proc_dointvec | |
858 | }, | |
f87c10a8 HFS |
859 | { |
860 | .procname = "ip_forward_use_pmtu", | |
861 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
862 | .maxlen = sizeof(int), | |
863 | .mode = 0644, | |
864 | .proc_handler = proc_dointvec, | |
865 | }, | |
49a60158 VB |
866 | { |
867 | .procname = "ip_nonlocal_bind", | |
868 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
869 | .maxlen = sizeof(int), | |
870 | .mode = 0644, | |
871 | .proc_handler = proc_dointvec | |
872 | }, | |
e110861f LC |
873 | { |
874 | .procname = "fwmark_reflect", | |
875 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
876 | .maxlen = sizeof(int), | |
877 | .mode = 0644, | |
878 | .proc_handler = proc_dointvec, | |
879 | }, | |
84f39b08 LC |
880 | { |
881 | .procname = "tcp_fwmark_accept", | |
882 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
883 | .maxlen = sizeof(int), | |
884 | .mode = 0644, | |
885 | .proc_handler = proc_dointvec, | |
886 | }, | |
b0f9ca53 FD |
887 | { |
888 | .procname = "tcp_mtu_probing", | |
889 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
890 | .maxlen = sizeof(int), | |
891 | .mode = 0644, | |
892 | .proc_handler = proc_dointvec, | |
893 | }, | |
894 | { | |
895 | .procname = "tcp_base_mss", | |
896 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
897 | .maxlen = sizeof(int), | |
898 | .mode = 0644, | |
899 | .proc_handler = proc_dointvec, | |
900 | }, | |
6b58e0a5 FD |
901 | { |
902 | .procname = "tcp_probe_threshold", | |
903 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
904 | .maxlen = sizeof(int), | |
905 | .mode = 0644, | |
906 | .proc_handler = proc_dointvec, | |
907 | }, | |
05cbc0db FD |
908 | { |
909 | .procname = "tcp_probe_interval", | |
910 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
911 | .maxlen = sizeof(int), | |
912 | .mode = 0644, | |
913 | .proc_handler = proc_dointvec, | |
914 | }, | |
68528f09 PE |
915 | { } |
916 | }; | |
917 | ||
1577519d PE |
918 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
919 | { | |
68528f09 PE |
920 | struct ctl_table *table; |
921 | ||
922 | table = ipv4_net_table; | |
09ad9bc7 | 923 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
924 | int i; |
925 | ||
68528f09 | 926 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
51456b29 | 927 | if (!table) |
68528f09 PE |
928 | goto err_alloc; |
929 | ||
0a6fa23d EB |
930 | /* Update the variables to point into the current struct net */ |
931 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
932 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
933 | } |
934 | ||
ec8f23ce | 935 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
51456b29 | 936 | if (!net->ipv4.ipv4_hdr) |
68528f09 PE |
937 | goto err_reg; |
938 | ||
122ff243 WC |
939 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
940 | if (!net->ipv4.sysctl_local_reserved_ports) | |
941 | goto err_ports; | |
942 | ||
1577519d | 943 | return 0; |
68528f09 | 944 | |
122ff243 WC |
945 | err_ports: |
946 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 947 | err_reg: |
09ad9bc7 | 948 | if (!net_eq(net, &init_net)) |
68528f09 PE |
949 | kfree(table); |
950 | err_alloc: | |
951 | return -ENOMEM; | |
1577519d PE |
952 | } |
953 | ||
954 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
955 | { | |
68528f09 PE |
956 | struct ctl_table *table; |
957 | ||
122ff243 | 958 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
959 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
960 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
961 | kfree(table); | |
1577519d PE |
962 | } |
963 | ||
964 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
965 | .init = ipv4_sysctl_init_net, | |
966 | .exit = ipv4_sysctl_exit_net, | |
967 | }; | |
968 | ||
3e37c3f9 PE |
969 | static __init int sysctl_ipv4_init(void) |
970 | { | |
971 | struct ctl_table_header *hdr; | |
972 | ||
ec8f23ce | 973 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
51456b29 | 974 | if (!hdr) |
1577519d PE |
975 | return -ENOMEM; |
976 | ||
977 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 978 | unregister_net_sysctl_table(hdr); |
1577519d PE |
979 | return -ENOMEM; |
980 | } | |
981 | ||
982 | return 0; | |
3e37c3f9 PE |
983 | } |
984 | ||
985 | __initcall(sysctl_ipv4_init); |