]>
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> |
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 }; | |
1da177e4 | 44 | |
227b60f5 | 45 | /* Update system visible IP port range */ |
0bbf87d8 | 46 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 47 | { |
ed2dfd90 ED |
48 | bool same_parity = !((range[0] ^ range[1]) & 1); |
49 | ||
c9d8f1a6 | 50 | write_seqlock(&net->ipv4.ip_local_ports.lock); |
ed2dfd90 ED |
51 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
52 | net->ipv4.ip_local_ports.warned = true; | |
53 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); | |
54 | } | |
c9d8f1a6 CW |
55 | net->ipv4.ip_local_ports.range[0] = range[0]; |
56 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
57 | write_sequnlock(&net->ipv4.ip_local_ports.lock); | |
227b60f5 SH |
58 | } |
59 | ||
60 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 61 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
62 | void __user *buffer, |
63 | size_t *lenp, loff_t *ppos) | |
64 | { | |
0bbf87d8 | 65 | struct net *net = |
c9d8f1a6 | 66 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 67 | int ret; |
3c689b73 | 68 | int range[2]; |
fe2c6338 | 69 | struct ctl_table tmp = { |
227b60f5 SH |
70 | .data = &range, |
71 | .maxlen = sizeof(range), | |
72 | .mode = table->mode, | |
73 | .extra1 = &ip_local_port_range_min, | |
74 | .extra2 = &ip_local_port_range_max, | |
75 | }; | |
76 | ||
0bbf87d8 EB |
77 | inet_get_local_port_range(net, &range[0], &range[1]); |
78 | ||
8d65af78 | 79 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
80 | |
81 | if (write && ret == 0) { | |
a25de534 | 82 | if (range[1] < range[0]) |
227b60f5 SH |
83 | ret = -EINVAL; |
84 | else | |
0bbf87d8 | 85 | set_local_port_range(net, range); |
227b60f5 SH |
86 | } |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
c319b4d7 | 91 | |
7064d16e | 92 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 93 | { |
7064d16e | 94 | kgid_t *data = table->data; |
0bbf87d8 | 95 | struct net *net = |
ba6b918a | 96 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 97 | unsigned int seq; |
c319b4d7 | 98 | do { |
c9d8f1a6 | 99 | seq = read_seqbegin(&net->ipv4.ip_local_ports.lock); |
c319b4d7 VK |
100 | |
101 | *low = data[0]; | |
102 | *high = data[1]; | |
c9d8f1a6 | 103 | } while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq)); |
c319b4d7 VK |
104 | } |
105 | ||
106 | /* Update system visible IP port range */ | |
7064d16e | 107 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 108 | { |
7064d16e | 109 | kgid_t *data = table->data; |
0bbf87d8 | 110 | struct net *net = |
ba6b918a | 111 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
c9d8f1a6 | 112 | write_seqlock(&net->ipv4.ip_local_ports.lock); |
7064d16e EB |
113 | data[0] = low; |
114 | data[1] = high; | |
c9d8f1a6 | 115 | write_sequnlock(&net->ipv4.ip_local_ports.lock); |
c319b4d7 VK |
116 | } |
117 | ||
118 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 119 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
120 | void __user *buffer, |
121 | size_t *lenp, loff_t *ppos) | |
122 | { | |
7064d16e | 123 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 124 | int ret; |
7064d16e EB |
125 | gid_t urange[2]; |
126 | kgid_t low, high; | |
fe2c6338 | 127 | struct ctl_table tmp = { |
7064d16e EB |
128 | .data = &urange, |
129 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
130 | .mode = table->mode, |
131 | .extra1 = &ip_ping_group_range_min, | |
132 | .extra2 = &ip_ping_group_range_max, | |
133 | }; | |
134 | ||
7064d16e EB |
135 | inet_get_ping_group_range_table(table, &low, &high); |
136 | urange[0] = from_kgid_munged(user_ns, low); | |
137 | urange[1] = from_kgid_munged(user_ns, high); | |
c319b4d7 VK |
138 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
139 | ||
7064d16e EB |
140 | if (write && ret == 0) { |
141 | low = make_kgid(user_ns, urange[0]); | |
142 | high = make_kgid(user_ns, urange[1]); | |
143 | if (!gid_valid(low) || !gid_valid(high) || | |
144 | (urange[1] < urange[0]) || gid_lt(high, low)) { | |
145 | low = make_kgid(&init_user_ns, 1); | |
146 | high = make_kgid(&init_user_ns, 0); | |
147 | } | |
148 | set_ping_group_range(table, low, high); | |
149 | } | |
c319b4d7 VK |
150 | |
151 | return ret; | |
152 | } | |
153 | ||
fe2c6338 | 154 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
155 | void __user *buffer, size_t *lenp, loff_t *ppos) |
156 | { | |
157 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 158 | struct ctl_table tbl = { |
317a76f9 SH |
159 | .data = val, |
160 | .maxlen = TCP_CA_NAME_MAX, | |
161 | }; | |
162 | int ret; | |
163 | ||
164 | tcp_get_default_congestion_control(val); | |
165 | ||
8d65af78 | 166 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
167 | if (write && ret == 0) |
168 | ret = tcp_set_default_congestion_control(val); | |
169 | return ret; | |
170 | } | |
171 | ||
fe2c6338 | 172 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 173 | int write, |
3ff825b2 SH |
174 | void __user *buffer, size_t *lenp, |
175 | loff_t *ppos) | |
176 | { | |
fe2c6338 | 177 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
178 | int ret; |
179 | ||
180 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
181 | if (!tbl.data) | |
182 | return -ENOMEM; | |
183 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 184 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
185 | kfree(tbl.data); |
186 | return ret; | |
187 | } | |
188 | ||
fe2c6338 | 189 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 190 | int write, |
ce7bc3bf SH |
191 | void __user *buffer, size_t *lenp, |
192 | loff_t *ppos) | |
193 | { | |
fe2c6338 | 194 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
195 | int ret; |
196 | ||
197 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
198 | if (!tbl.data) | |
199 | return -ENOMEM; | |
200 | ||
201 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 202 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
203 | if (write && ret == 0) |
204 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
205 | kfree(tbl.data); | |
206 | return ret; | |
207 | } | |
208 | ||
fe2c6338 JP |
209 | static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write, |
210 | void __user *buffer, size_t *lenp, | |
211 | loff_t *ppos) | |
10467163 | 212 | { |
fe2c6338 | 213 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
214 | struct tcp_fastopen_context *ctxt; |
215 | int ret; | |
216 | u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ | |
217 | ||
218 | tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); | |
219 | if (!tbl.data) | |
220 | return -ENOMEM; | |
221 | ||
222 | rcu_read_lock(); | |
223 | ctxt = rcu_dereference(tcp_fastopen_ctx); | |
224 | if (ctxt) | |
225 | memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); | |
0e24c4fc AC |
226 | else |
227 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
228 | rcu_read_unlock(); |
229 | ||
230 | snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x", | |
231 | user_key[0], user_key[1], user_key[2], user_key[3]); | |
232 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
233 | ||
234 | if (write && ret == 0) { | |
235 | if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1, | |
236 | user_key + 2, user_key + 3) != 4) { | |
237 | ret = -EINVAL; | |
238 | goto bad_key; | |
239 | } | |
222e83d2 HFS |
240 | /* Generate a dummy secret but don't publish it. This |
241 | * is needed so we don't regenerate a new key on the | |
242 | * first invocation of tcp_fastopen_cookie_gen | |
243 | */ | |
244 | tcp_fastopen_init_key_once(false); | |
10467163 JC |
245 | tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH); |
246 | } | |
247 | ||
248 | bad_key: | |
249 | pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", | |
250 | user_key[0], user_key[1], user_key[2], user_key[3], | |
251 | (char *)tbl.data, ret); | |
252 | kfree(tbl.data); | |
253 | return ret; | |
254 | } | |
255 | ||
3e37c3f9 | 256 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 257 | { |
1da177e4 LT |
258 | .procname = "tcp_timestamps", |
259 | .data = &sysctl_tcp_timestamps, | |
260 | .maxlen = sizeof(int), | |
261 | .mode = 0644, | |
6d9f239a | 262 | .proc_handler = proc_dointvec |
1da177e4 | 263 | }, |
e905a9ed | 264 | { |
1da177e4 LT |
265 | .procname = "tcp_window_scaling", |
266 | .data = &sysctl_tcp_window_scaling, | |
267 | .maxlen = sizeof(int), | |
268 | .mode = 0644, | |
6d9f239a | 269 | .proc_handler = proc_dointvec |
1da177e4 | 270 | }, |
e905a9ed | 271 | { |
1da177e4 LT |
272 | .procname = "tcp_sack", |
273 | .data = &sysctl_tcp_sack, | |
274 | .maxlen = sizeof(int), | |
275 | .mode = 0644, | |
6d9f239a | 276 | .proc_handler = proc_dointvec |
1da177e4 | 277 | }, |
e905a9ed | 278 | { |
1da177e4 LT |
279 | .procname = "tcp_retrans_collapse", |
280 | .data = &sysctl_tcp_retrans_collapse, | |
281 | .maxlen = sizeof(int), | |
282 | .mode = 0644, | |
6d9f239a | 283 | .proc_handler = proc_dointvec |
1da177e4 | 284 | }, |
e905a9ed | 285 | { |
1da177e4 | 286 | .procname = "ip_default_ttl", |
e905a9ed | 287 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
288 | .maxlen = sizeof(int), |
289 | .mode = 0644, | |
249fab77 ED |
290 | .proc_handler = proc_dointvec_minmax, |
291 | .extra1 = &ip_ttl_min, | |
292 | .extra2 = &ip_ttl_max, | |
1da177e4 | 293 | }, |
1da177e4 | 294 | { |
1da177e4 LT |
295 | .procname = "tcp_syn_retries", |
296 | .data = &sysctl_tcp_syn_retries, | |
297 | .maxlen = sizeof(int), | |
298 | .mode = 0644, | |
651e9271 MT |
299 | .proc_handler = proc_dointvec_minmax, |
300 | .extra1 = &tcp_syn_retries_min, | |
301 | .extra2 = &tcp_syn_retries_max | |
1da177e4 LT |
302 | }, |
303 | { | |
1da177e4 LT |
304 | .procname = "tcp_synack_retries", |
305 | .data = &sysctl_tcp_synack_retries, | |
306 | .maxlen = sizeof(int), | |
307 | .mode = 0644, | |
6d9f239a | 308 | .proc_handler = proc_dointvec |
1da177e4 LT |
309 | }, |
310 | { | |
1da177e4 LT |
311 | .procname = "tcp_max_orphans", |
312 | .data = &sysctl_tcp_max_orphans, | |
313 | .maxlen = sizeof(int), | |
314 | .mode = 0644, | |
6d9f239a | 315 | .proc_handler = proc_dointvec |
1da177e4 LT |
316 | }, |
317 | { | |
1da177e4 | 318 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 319 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
320 | .maxlen = sizeof(int), |
321 | .mode = 0644, | |
6d9f239a | 322 | .proc_handler = proc_dointvec |
1da177e4 | 323 | }, |
6648bd7e AD |
324 | { |
325 | .procname = "ip_early_demux", | |
326 | .data = &sysctl_ip_early_demux, | |
327 | .maxlen = sizeof(int), | |
328 | .mode = 0644, | |
329 | .proc_handler = proc_dointvec | |
330 | }, | |
1da177e4 | 331 | { |
1da177e4 LT |
332 | .procname = "ip_dynaddr", |
333 | .data = &sysctl_ip_dynaddr, | |
334 | .maxlen = sizeof(int), | |
335 | .mode = 0644, | |
6d9f239a | 336 | .proc_handler = proc_dointvec |
1da177e4 | 337 | }, |
1da177e4 | 338 | { |
1da177e4 LT |
339 | .procname = "tcp_keepalive_time", |
340 | .data = &sysctl_tcp_keepalive_time, | |
341 | .maxlen = sizeof(int), | |
342 | .mode = 0644, | |
6d9f239a | 343 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
344 | }, |
345 | { | |
1da177e4 LT |
346 | .procname = "tcp_keepalive_probes", |
347 | .data = &sysctl_tcp_keepalive_probes, | |
348 | .maxlen = sizeof(int), | |
349 | .mode = 0644, | |
6d9f239a | 350 | .proc_handler = proc_dointvec |
1da177e4 LT |
351 | }, |
352 | { | |
1da177e4 LT |
353 | .procname = "tcp_keepalive_intvl", |
354 | .data = &sysctl_tcp_keepalive_intvl, | |
355 | .maxlen = sizeof(int), | |
356 | .mode = 0644, | |
6d9f239a | 357 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
358 | }, |
359 | { | |
1da177e4 LT |
360 | .procname = "tcp_retries1", |
361 | .data = &sysctl_tcp_retries1, | |
362 | .maxlen = sizeof(int), | |
363 | .mode = 0644, | |
6d9f239a | 364 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
365 | .extra2 = &tcp_retr1_max |
366 | }, | |
367 | { | |
1da177e4 LT |
368 | .procname = "tcp_retries2", |
369 | .data = &sysctl_tcp_retries2, | |
370 | .maxlen = sizeof(int), | |
371 | .mode = 0644, | |
6d9f239a | 372 | .proc_handler = proc_dointvec |
1da177e4 LT |
373 | }, |
374 | { | |
1da177e4 LT |
375 | .procname = "tcp_fin_timeout", |
376 | .data = &sysctl_tcp_fin_timeout, | |
377 | .maxlen = sizeof(int), | |
378 | .mode = 0644, | |
6d9f239a | 379 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
380 | }, |
381 | #ifdef CONFIG_SYN_COOKIES | |
382 | { | |
1da177e4 LT |
383 | .procname = "tcp_syncookies", |
384 | .data = &sysctl_tcp_syncookies, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
6d9f239a | 387 | .proc_handler = proc_dointvec |
1da177e4 LT |
388 | }, |
389 | #endif | |
2100c8d2 YC |
390 | { |
391 | .procname = "tcp_fastopen", | |
392 | .data = &sysctl_tcp_fastopen, | |
393 | .maxlen = sizeof(int), | |
394 | .mode = 0644, | |
395 | .proc_handler = proc_dointvec, | |
396 | }, | |
10467163 JC |
397 | { |
398 | .procname = "tcp_fastopen_key", | |
399 | .mode = 0600, | |
400 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
401 | .proc_handler = proc_tcp_fastopen_key, | |
402 | }, | |
1da177e4 | 403 | { |
1da177e4 | 404 | .procname = "tcp_tw_recycle", |
295ff7ed | 405 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
406 | .maxlen = sizeof(int), |
407 | .mode = 0644, | |
6d9f239a | 408 | .proc_handler = proc_dointvec |
1da177e4 LT |
409 | }, |
410 | { | |
1da177e4 LT |
411 | .procname = "tcp_abort_on_overflow", |
412 | .data = &sysctl_tcp_abort_on_overflow, | |
413 | .maxlen = sizeof(int), | |
414 | .mode = 0644, | |
6d9f239a | 415 | .proc_handler = proc_dointvec |
1da177e4 LT |
416 | }, |
417 | { | |
1da177e4 LT |
418 | .procname = "tcp_stdurg", |
419 | .data = &sysctl_tcp_stdurg, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
6d9f239a | 422 | .proc_handler = proc_dointvec |
1da177e4 LT |
423 | }, |
424 | { | |
1da177e4 LT |
425 | .procname = "tcp_rfc1337", |
426 | .data = &sysctl_tcp_rfc1337, | |
427 | .maxlen = sizeof(int), | |
428 | .mode = 0644, | |
6d9f239a | 429 | .proc_handler = proc_dointvec |
1da177e4 LT |
430 | }, |
431 | { | |
1da177e4 LT |
432 | .procname = "tcp_max_syn_backlog", |
433 | .data = &sysctl_max_syn_backlog, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
6d9f239a | 436 | .proc_handler = proc_dointvec |
1da177e4 | 437 | }, |
1da177e4 | 438 | { |
1da177e4 LT |
439 | .procname = "igmp_max_memberships", |
440 | .data = &sysctl_igmp_max_memberships, | |
441 | .maxlen = sizeof(int), | |
442 | .mode = 0644, | |
6d9f239a | 443 | .proc_handler = proc_dointvec |
1da177e4 | 444 | }, |
1da177e4 | 445 | { |
1da177e4 LT |
446 | .procname = "igmp_max_msf", |
447 | .data = &sysctl_igmp_max_msf, | |
448 | .maxlen = sizeof(int), | |
449 | .mode = 0644, | |
6d9f239a | 450 | .proc_handler = proc_dointvec |
1da177e4 | 451 | }, |
a9fe8e29 HFS |
452 | #ifdef CONFIG_IP_MULTICAST |
453 | { | |
454 | .procname = "igmp_qrv", | |
455 | .data = &sysctl_igmp_qrv, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
458 | .proc_handler = proc_dointvec_minmax, | |
459 | .extra1 = &one | |
460 | }, | |
461 | #endif | |
1da177e4 | 462 | { |
1da177e4 LT |
463 | .procname = "inet_peer_threshold", |
464 | .data = &inet_peer_threshold, | |
465 | .maxlen = sizeof(int), | |
466 | .mode = 0644, | |
6d9f239a | 467 | .proc_handler = proc_dointvec |
1da177e4 LT |
468 | }, |
469 | { | |
1da177e4 LT |
470 | .procname = "inet_peer_minttl", |
471 | .data = &inet_peer_minttl, | |
472 | .maxlen = sizeof(int), | |
473 | .mode = 0644, | |
6d9f239a | 474 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
475 | }, |
476 | { | |
1da177e4 LT |
477 | .procname = "inet_peer_maxttl", |
478 | .data = &inet_peer_maxttl, | |
479 | .maxlen = sizeof(int), | |
480 | .mode = 0644, | |
6d9f239a | 481 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 482 | }, |
1da177e4 | 483 | { |
1da177e4 LT |
484 | .procname = "tcp_orphan_retries", |
485 | .data = &sysctl_tcp_orphan_retries, | |
486 | .maxlen = sizeof(int), | |
487 | .mode = 0644, | |
6d9f239a | 488 | .proc_handler = proc_dointvec |
1da177e4 LT |
489 | }, |
490 | { | |
1da177e4 LT |
491 | .procname = "tcp_fack", |
492 | .data = &sysctl_tcp_fack, | |
493 | .maxlen = sizeof(int), | |
494 | .mode = 0644, | |
6d9f239a | 495 | .proc_handler = proc_dointvec |
1da177e4 LT |
496 | }, |
497 | { | |
1da177e4 LT |
498 | .procname = "tcp_reordering", |
499 | .data = &sysctl_tcp_reordering, | |
500 | .maxlen = sizeof(int), | |
501 | .mode = 0644, | |
6d9f239a | 502 | .proc_handler = proc_dointvec |
1da177e4 | 503 | }, |
dca145ff ED |
504 | { |
505 | .procname = "tcp_max_reordering", | |
506 | .data = &sysctl_tcp_max_reordering, | |
507 | .maxlen = sizeof(int), | |
508 | .mode = 0644, | |
509 | .proc_handler = proc_dointvec | |
510 | }, | |
1da177e4 | 511 | { |
1da177e4 LT |
512 | .procname = "tcp_dsack", |
513 | .data = &sysctl_tcp_dsack, | |
514 | .maxlen = sizeof(int), | |
515 | .mode = 0644, | |
6d9f239a | 516 | .proc_handler = proc_dointvec |
1da177e4 | 517 | }, |
a4fe34bf EB |
518 | { |
519 | .procname = "tcp_mem", | |
520 | .maxlen = sizeof(sysctl_tcp_mem), | |
521 | .data = &sysctl_tcp_mem, | |
522 | .mode = 0644, | |
523 | .proc_handler = proc_doulongvec_minmax, | |
524 | }, | |
1da177e4 | 525 | { |
1da177e4 LT |
526 | .procname = "tcp_wmem", |
527 | .data = &sysctl_tcp_wmem, | |
528 | .maxlen = sizeof(sysctl_tcp_wmem), | |
529 | .mode = 0644, | |
cdda8891 | 530 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 531 | .extra1 = &one, |
1da177e4 | 532 | }, |
c9bee3b7 ED |
533 | { |
534 | .procname = "tcp_notsent_lowat", | |
535 | .data = &sysctl_tcp_notsent_lowat, | |
536 | .maxlen = sizeof(sysctl_tcp_notsent_lowat), | |
537 | .mode = 0644, | |
538 | .proc_handler = proc_dointvec, | |
539 | }, | |
1da177e4 | 540 | { |
1da177e4 LT |
541 | .procname = "tcp_rmem", |
542 | .data = &sysctl_tcp_rmem, | |
543 | .maxlen = sizeof(sysctl_tcp_rmem), | |
544 | .mode = 0644, | |
cdda8891 | 545 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 546 | .extra1 = &one, |
1da177e4 LT |
547 | }, |
548 | { | |
1da177e4 LT |
549 | .procname = "tcp_app_win", |
550 | .data = &sysctl_tcp_app_win, | |
551 | .maxlen = sizeof(int), | |
552 | .mode = 0644, | |
6d9f239a | 553 | .proc_handler = proc_dointvec |
1da177e4 LT |
554 | }, |
555 | { | |
1da177e4 LT |
556 | .procname = "tcp_adv_win_scale", |
557 | .data = &sysctl_tcp_adv_win_scale, | |
558 | .maxlen = sizeof(int), | |
559 | .mode = 0644, | |
0147fc05 AD |
560 | .proc_handler = proc_dointvec_minmax, |
561 | .extra1 = &tcp_adv_win_scale_min, | |
562 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 563 | }, |
1da177e4 | 564 | { |
1da177e4 LT |
565 | .procname = "tcp_tw_reuse", |
566 | .data = &sysctl_tcp_tw_reuse, | |
567 | .maxlen = sizeof(int), | |
568 | .mode = 0644, | |
6d9f239a | 569 | .proc_handler = proc_dointvec |
1da177e4 LT |
570 | }, |
571 | { | |
1da177e4 LT |
572 | .procname = "tcp_frto", |
573 | .data = &sysctl_tcp_frto, | |
574 | .maxlen = sizeof(int), | |
575 | .mode = 0644, | |
6d9f239a | 576 | .proc_handler = proc_dointvec |
1da177e4 LT |
577 | }, |
578 | { | |
1da177e4 LT |
579 | .procname = "tcp_low_latency", |
580 | .data = &sysctl_tcp_low_latency, | |
581 | .maxlen = sizeof(int), | |
582 | .mode = 0644, | |
6d9f239a | 583 | .proc_handler = proc_dointvec |
1da177e4 | 584 | }, |
1da177e4 | 585 | { |
1da177e4 LT |
586 | .procname = "tcp_no_metrics_save", |
587 | .data = &sysctl_tcp_nometrics_save, | |
588 | .maxlen = sizeof(int), | |
589 | .mode = 0644, | |
6d9f239a | 590 | .proc_handler = proc_dointvec, |
1da177e4 | 591 | }, |
1da177e4 | 592 | { |
1da177e4 LT |
593 | .procname = "tcp_moderate_rcvbuf", |
594 | .data = &sysctl_tcp_moderate_rcvbuf, | |
595 | .maxlen = sizeof(int), | |
596 | .mode = 0644, | |
6d9f239a | 597 | .proc_handler = proc_dointvec, |
1da177e4 LT |
598 | }, |
599 | { | |
1da177e4 LT |
600 | .procname = "tcp_tso_win_divisor", |
601 | .data = &sysctl_tcp_tso_win_divisor, | |
602 | .maxlen = sizeof(int), | |
603 | .mode = 0644, | |
6d9f239a | 604 | .proc_handler = proc_dointvec, |
1da177e4 LT |
605 | }, |
606 | { | |
317a76f9 | 607 | .procname = "tcp_congestion_control", |
1da177e4 | 608 | .mode = 0644, |
317a76f9 | 609 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 610 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 611 | }, |
e905a9ed | 612 | { |
15d99e02 RJ |
613 | .procname = "tcp_workaround_signed_windows", |
614 | .data = &sysctl_tcp_workaround_signed_windows, | |
615 | .maxlen = sizeof(int), | |
616 | .mode = 0644, | |
6d9f239a | 617 | .proc_handler = proc_dointvec |
15d99e02 | 618 | }, |
46d3ceab ED |
619 | { |
620 | .procname = "tcp_limit_output_bytes", | |
621 | .data = &sysctl_tcp_limit_output_bytes, | |
622 | .maxlen = sizeof(int), | |
623 | .mode = 0644, | |
624 | .proc_handler = proc_dointvec | |
625 | }, | |
282f23c6 ED |
626 | { |
627 | .procname = "tcp_challenge_ack_limit", | |
628 | .data = &sysctl_tcp_challenge_ack_limit, | |
629 | .maxlen = sizeof(int), | |
630 | .mode = 0644, | |
631 | .proc_handler = proc_dointvec | |
632 | }, | |
35089bb2 | 633 | { |
35089bb2 DM |
634 | .procname = "tcp_slow_start_after_idle", |
635 | .data = &sysctl_tcp_slow_start_after_idle, | |
636 | .maxlen = sizeof(int), | |
637 | .mode = 0644, | |
6d9f239a | 638 | .proc_handler = proc_dointvec |
35089bb2 | 639 | }, |
446fda4f PM |
640 | #ifdef CONFIG_NETLABEL |
641 | { | |
446fda4f PM |
642 | .procname = "cipso_cache_enable", |
643 | .data = &cipso_v4_cache_enabled, | |
644 | .maxlen = sizeof(int), | |
645 | .mode = 0644, | |
6d9f239a | 646 | .proc_handler = proc_dointvec, |
446fda4f PM |
647 | }, |
648 | { | |
446fda4f PM |
649 | .procname = "cipso_cache_bucket_size", |
650 | .data = &cipso_v4_cache_bucketsize, | |
651 | .maxlen = sizeof(int), | |
652 | .mode = 0644, | |
6d9f239a | 653 | .proc_handler = proc_dointvec, |
446fda4f PM |
654 | }, |
655 | { | |
446fda4f PM |
656 | .procname = "cipso_rbm_optfmt", |
657 | .data = &cipso_v4_rbm_optfmt, | |
658 | .maxlen = sizeof(int), | |
659 | .mode = 0644, | |
6d9f239a | 660 | .proc_handler = proc_dointvec, |
446fda4f PM |
661 | }, |
662 | { | |
446fda4f PM |
663 | .procname = "cipso_rbm_strictvalid", |
664 | .data = &cipso_v4_rbm_strictvalid, | |
665 | .maxlen = sizeof(int), | |
666 | .mode = 0644, | |
6d9f239a | 667 | .proc_handler = proc_dointvec, |
446fda4f PM |
668 | }, |
669 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 670 | { |
3ff825b2 SH |
671 | .procname = "tcp_available_congestion_control", |
672 | .maxlen = TCP_CA_BUF_MAX, | |
673 | .mode = 0444, | |
6d9f239a | 674 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 675 | }, |
ce7bc3bf | 676 | { |
ce7bc3bf SH |
677 | .procname = "tcp_allowed_congestion_control", |
678 | .maxlen = TCP_CA_BUF_MAX, | |
679 | .mode = 0644, | |
6d9f239a | 680 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 681 | }, |
36e31b0a AP |
682 | { |
683 | .procname = "tcp_thin_linear_timeouts", | |
684 | .data = &sysctl_tcp_thin_linear_timeouts, | |
685 | .maxlen = sizeof(int), | |
686 | .mode = 0644, | |
687 | .proc_handler = proc_dointvec | |
688 | }, | |
5797deb6 | 689 | { |
7e380175 AP |
690 | .procname = "tcp_thin_dupack", |
691 | .data = &sysctl_tcp_thin_dupack, | |
692 | .maxlen = sizeof(int), | |
693 | .mode = 0644, | |
694 | .proc_handler = proc_dointvec | |
695 | }, | |
eed530b6 YC |
696 | { |
697 | .procname = "tcp_early_retrans", | |
698 | .data = &sysctl_tcp_early_retrans, | |
699 | .maxlen = sizeof(int), | |
700 | .mode = 0644, | |
701 | .proc_handler = proc_dointvec_minmax, | |
702 | .extra1 = &zero, | |
6ba8a3b1 | 703 | .extra2 = &four, |
eed530b6 | 704 | }, |
95bd09eb ED |
705 | { |
706 | .procname = "tcp_min_tso_segs", | |
707 | .data = &sysctl_tcp_min_tso_segs, | |
708 | .maxlen = sizeof(int), | |
709 | .mode = 0644, | |
710 | .proc_handler = proc_dointvec_minmax, | |
d6a4e26a | 711 | .extra1 = &one, |
95bd09eb ED |
712 | .extra2 = &gso_max_segs, |
713 | }, | |
f54b3111 ED |
714 | { |
715 | .procname = "tcp_autocorking", | |
716 | .data = &sysctl_tcp_autocorking, | |
717 | .maxlen = sizeof(int), | |
718 | .mode = 0644, | |
719 | .proc_handler = proc_dointvec_minmax, | |
720 | .extra1 = &zero, | |
721 | .extra2 = &one, | |
722 | }, | |
032ee423 NC |
723 | { |
724 | .procname = "tcp_invalid_ratelimit", | |
725 | .data = &sysctl_tcp_invalid_ratelimit, | |
726 | .maxlen = sizeof(int), | |
727 | .mode = 0644, | |
728 | .proc_handler = proc_dointvec_ms_jiffies, | |
729 | }, | |
4cdf507d ED |
730 | { |
731 | .procname = "icmp_msgs_per_sec", | |
732 | .data = &sysctl_icmp_msgs_per_sec, | |
733 | .maxlen = sizeof(int), | |
734 | .mode = 0644, | |
735 | .proc_handler = proc_dointvec_minmax, | |
736 | .extra1 = &zero, | |
737 | }, | |
738 | { | |
739 | .procname = "icmp_msgs_burst", | |
740 | .data = &sysctl_icmp_msgs_burst, | |
741 | .maxlen = sizeof(int), | |
742 | .mode = 0644, | |
743 | .proc_handler = proc_dointvec_minmax, | |
744 | .extra1 = &zero, | |
745 | }, | |
95766fff | 746 | { |
95766fff HA |
747 | .procname = "udp_mem", |
748 | .data = &sysctl_udp_mem, | |
749 | .maxlen = sizeof(sysctl_udp_mem), | |
750 | .mode = 0644, | |
8d987e5c | 751 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
752 | }, |
753 | { | |
95766fff HA |
754 | .procname = "udp_rmem_min", |
755 | .data = &sysctl_udp_rmem_min, | |
756 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
757 | .mode = 0644, | |
6d9f239a | 758 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 759 | .extra1 = &one |
95766fff HA |
760 | }, |
761 | { | |
95766fff HA |
762 | .procname = "udp_wmem_min", |
763 | .data = &sysctl_udp_wmem_min, | |
764 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
765 | .mode = 0644, | |
6d9f239a | 766 | .proc_handler = proc_dointvec_minmax, |
5d37852b | 767 | .extra1 = &one |
95766fff | 768 | }, |
f8572d8f | 769 | { } |
1da177e4 | 770 | }; |
3e37c3f9 | 771 | |
68528f09 PE |
772 | static struct ctl_table ipv4_net_table[] = { |
773 | { | |
68528f09 PE |
774 | .procname = "icmp_echo_ignore_all", |
775 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
776 | .maxlen = sizeof(int), | |
777 | .mode = 0644, | |
6d9f239a | 778 | .proc_handler = proc_dointvec |
68528f09 PE |
779 | }, |
780 | { | |
68528f09 PE |
781 | .procname = "icmp_echo_ignore_broadcasts", |
782 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
783 | .maxlen = sizeof(int), | |
784 | .mode = 0644, | |
6d9f239a | 785 | .proc_handler = proc_dointvec |
68528f09 PE |
786 | }, |
787 | { | |
68528f09 PE |
788 | .procname = "icmp_ignore_bogus_error_responses", |
789 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
790 | .maxlen = sizeof(int), | |
791 | .mode = 0644, | |
6d9f239a | 792 | .proc_handler = proc_dointvec |
68528f09 PE |
793 | }, |
794 | { | |
68528f09 PE |
795 | .procname = "icmp_errors_use_inbound_ifaddr", |
796 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
797 | .maxlen = sizeof(int), | |
798 | .mode = 0644, | |
6d9f239a | 799 | .proc_handler = proc_dointvec |
68528f09 PE |
800 | }, |
801 | { | |
68528f09 PE |
802 | .procname = "icmp_ratelimit", |
803 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
804 | .maxlen = sizeof(int), | |
805 | .mode = 0644, | |
6d9f239a | 806 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
807 | }, |
808 | { | |
68528f09 PE |
809 | .procname = "icmp_ratemask", |
810 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
811 | .maxlen = sizeof(int), | |
812 | .mode = 0644, | |
6d9f239a | 813 | .proc_handler = proc_dointvec |
68528f09 | 814 | }, |
c319b4d7 VK |
815 | { |
816 | .procname = "ping_group_range", | |
ba6b918a | 817 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 818 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
819 | .mode = 0644, |
820 | .proc_handler = ipv4_ping_group_range, | |
821 | }, | |
5d134f1c HFS |
822 | { |
823 | .procname = "tcp_ecn", | |
824 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
827 | .proc_handler = proc_dointvec | |
828 | }, | |
49213555 DB |
829 | { |
830 | .procname = "tcp_ecn_fallback", | |
831 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, | |
832 | .maxlen = sizeof(int), | |
833 | .mode = 0644, | |
834 | .proc_handler = proc_dointvec | |
835 | }, | |
0bbf87d8 EB |
836 | { |
837 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
838 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
839 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
840 | .mode = 0644, |
841 | .proc_handler = ipv4_local_port_range, | |
842 | }, | |
122ff243 WC |
843 | { |
844 | .procname = "ip_local_reserved_ports", | |
845 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
846 | .maxlen = 65536, | |
847 | .mode = 0644, | |
848 | .proc_handler = proc_do_large_bitmap, | |
849 | }, | |
974eda11 HFS |
850 | { |
851 | .procname = "ip_no_pmtu_disc", | |
852 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
853 | .maxlen = sizeof(int), | |
854 | .mode = 0644, | |
855 | .proc_handler = proc_dointvec | |
856 | }, | |
f87c10a8 HFS |
857 | { |
858 | .procname = "ip_forward_use_pmtu", | |
859 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
860 | .maxlen = sizeof(int), | |
861 | .mode = 0644, | |
862 | .proc_handler = proc_dointvec, | |
863 | }, | |
49a60158 VB |
864 | { |
865 | .procname = "ip_nonlocal_bind", | |
866 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
867 | .maxlen = sizeof(int), | |
868 | .mode = 0644, | |
869 | .proc_handler = proc_dointvec | |
870 | }, | |
e110861f LC |
871 | { |
872 | .procname = "fwmark_reflect", | |
873 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
874 | .maxlen = sizeof(int), | |
875 | .mode = 0644, | |
876 | .proc_handler = proc_dointvec, | |
877 | }, | |
84f39b08 LC |
878 | { |
879 | .procname = "tcp_fwmark_accept", | |
880 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
881 | .maxlen = sizeof(int), | |
882 | .mode = 0644, | |
883 | .proc_handler = proc_dointvec, | |
884 | }, | |
b0f9ca53 FD |
885 | { |
886 | .procname = "tcp_mtu_probing", | |
887 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, | |
888 | .maxlen = sizeof(int), | |
889 | .mode = 0644, | |
890 | .proc_handler = proc_dointvec, | |
891 | }, | |
892 | { | |
893 | .procname = "tcp_base_mss", | |
894 | .data = &init_net.ipv4.sysctl_tcp_base_mss, | |
895 | .maxlen = sizeof(int), | |
896 | .mode = 0644, | |
897 | .proc_handler = proc_dointvec, | |
898 | }, | |
6b58e0a5 FD |
899 | { |
900 | .procname = "tcp_probe_threshold", | |
901 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, | |
902 | .maxlen = sizeof(int), | |
903 | .mode = 0644, | |
904 | .proc_handler = proc_dointvec, | |
905 | }, | |
05cbc0db FD |
906 | { |
907 | .procname = "tcp_probe_interval", | |
908 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, | |
909 | .maxlen = sizeof(int), | |
910 | .mode = 0644, | |
911 | .proc_handler = proc_dointvec, | |
912 | }, | |
68528f09 PE |
913 | { } |
914 | }; | |
915 | ||
1577519d PE |
916 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
917 | { | |
68528f09 PE |
918 | struct ctl_table *table; |
919 | ||
920 | table = ipv4_net_table; | |
09ad9bc7 | 921 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
922 | int i; |
923 | ||
68528f09 | 924 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
51456b29 | 925 | if (!table) |
68528f09 PE |
926 | goto err_alloc; |
927 | ||
0a6fa23d EB |
928 | /* Update the variables to point into the current struct net */ |
929 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
930 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
931 | } |
932 | ||
ec8f23ce | 933 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
51456b29 | 934 | if (!net->ipv4.ipv4_hdr) |
68528f09 PE |
935 | goto err_reg; |
936 | ||
122ff243 WC |
937 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
938 | if (!net->ipv4.sysctl_local_reserved_ports) | |
939 | goto err_ports; | |
940 | ||
1577519d | 941 | return 0; |
68528f09 | 942 | |
122ff243 WC |
943 | err_ports: |
944 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 945 | err_reg: |
09ad9bc7 | 946 | if (!net_eq(net, &init_net)) |
68528f09 PE |
947 | kfree(table); |
948 | err_alloc: | |
949 | return -ENOMEM; | |
1577519d PE |
950 | } |
951 | ||
952 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
953 | { | |
68528f09 PE |
954 | struct ctl_table *table; |
955 | ||
122ff243 | 956 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
957 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
958 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
959 | kfree(table); | |
1577519d PE |
960 | } |
961 | ||
962 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
963 | .init = ipv4_sysctl_init_net, | |
964 | .exit = ipv4_sysctl_exit_net, | |
965 | }; | |
966 | ||
3e37c3f9 PE |
967 | static __init int sysctl_ipv4_init(void) |
968 | { | |
969 | struct ctl_table_header *hdr; | |
970 | ||
ec8f23ce | 971 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
51456b29 | 972 | if (!hdr) |
1577519d PE |
973 | return -ENOMEM; |
974 | ||
975 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 976 | unregister_net_sysctl_table(hdr); |
1577519d PE |
977 | return -ENOMEM; |
978 | } | |
979 | ||
980 | return 0; | |
3e37c3f9 PE |
981 | } |
982 | ||
983 | __initcall(sysctl_ipv4_init); |