blob: 69fd7201129a742ee748932d52929d7fe548289c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
3 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * 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>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030011#include <linux/igmp.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020012#include <linux/inetdevice.h>
Stephen Hemminger227b60f2007-10-10 17:30:46 -070013#include <linux/seqlock.h>
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -080014#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000016#include <linux/nsproxy.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <net/snmp.h>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030018#include <net/icmp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <net/ip.h>
20#include <net/route.h>
21#include <net/tcp.h>
Hideo Aoki95766ff2007-12-31 00:29:24 -080022#include <net/udp.h>
Paul Moore446fda42006-08-03 16:48:06 -070023#include <net/cipso_ipv4.h>
Pavel Emelyanov04128f22007-10-15 02:33:45 -070024#include <net/inet_frag.h>
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000025#include <net/ping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Herbert Xu89cee8b2005-12-13 23:14:27 -080027static int zero;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +090028static int tcp_retr1_max = 255;
Linus Torvalds1da177e2005-04-16 15:20:36 -070029static int ip_local_port_range_min[] = { 1, 1 };
30static int ip_local_port_range_max[] = { 65535, 65535 };
Alexey Dobriyan0147fc02010-11-22 12:54:21 +000031static int tcp_adv_win_scale_min = -31;
32static int tcp_adv_win_scale_max = 31;
Eric Dumazet249fab72010-12-13 12:16:14 -080033static int ip_ttl_min = 1;
34static int ip_ttl_max = 255;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000035static int ip_ping_group_range_min[] = { 0, 0 };
36static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Stephen Hemminger227b60f2007-10-10 17:30:46 -070038/* Update system visible IP port range */
39static void set_local_port_range(int range[2])
40{
Eric Dumazet3c689b72008-10-08 14:18:04 -070041 write_seqlock(&sysctl_local_ports.lock);
42 sysctl_local_ports.range[0] = range[0];
43 sysctl_local_ports.range[1] = range[1];
44 write_sequnlock(&sysctl_local_ports.lock);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070045}
46
47/* Validate changes from /proc interface. */
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070048static int ipv4_local_port_range(ctl_table *table, int write,
Stephen Hemminger227b60f2007-10-10 17:30:46 -070049 void __user *buffer,
50 size_t *lenp, loff_t *ppos)
51{
52 int ret;
Eric Dumazet3c689b72008-10-08 14:18:04 -070053 int range[2];
Stephen Hemminger227b60f2007-10-10 17:30:46 -070054 ctl_table tmp = {
55 .data = &range,
56 .maxlen = sizeof(range),
57 .mode = table->mode,
58 .extra1 = &ip_local_port_range_min,
59 .extra2 = &ip_local_port_range_max,
60 };
61
Eric Dumazet3c689b72008-10-08 14:18:04 -070062 inet_get_local_port_range(range, range + 1);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070063 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070064
65 if (write && ret == 0) {
Anton Arapova25de532007-10-18 22:00:17 -070066 if (range[1] < range[0])
Stephen Hemminger227b60f2007-10-10 17:30:46 -070067 ret = -EINVAL;
68 else
69 set_local_port_range(range);
70 }
71
72 return ret;
73}
74
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000075
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000076void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high)
77{
78 gid_t *data = table->data;
79 unsigned seq;
80 do {
81 seq = read_seqbegin(&sysctl_local_ports.lock);
82
83 *low = data[0];
84 *high = data[1];
85 } while (read_seqretry(&sysctl_local_ports.lock, seq));
86}
87
88/* Update system visible IP port range */
89static void set_ping_group_range(struct ctl_table *table, int range[2])
90{
91 gid_t *data = table->data;
92 write_seqlock(&sysctl_local_ports.lock);
93 data[0] = range[0];
94 data[1] = range[1];
95 write_sequnlock(&sysctl_local_ports.lock);
96}
97
98/* Validate changes from /proc interface. */
99static int ipv4_ping_group_range(ctl_table *table, int write,
100 void __user *buffer,
101 size_t *lenp, loff_t *ppos)
102{
103 int ret;
104 gid_t range[2];
105 ctl_table tmp = {
106 .data = &range,
107 .maxlen = sizeof(range),
108 .mode = table->mode,
109 .extra1 = &ip_ping_group_range_min,
110 .extra2 = &ip_ping_group_range_max,
111 };
112
113 inet_get_ping_group_range_table(table, range, range + 1);
114 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
115
116 if (write && ret == 0)
117 set_ping_group_range(table, range);
118
119 return ret;
120}
121
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700122static int proc_tcp_congestion_control(ctl_table *ctl, int write,
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700123 void __user *buffer, size_t *lenp, loff_t *ppos)
124{
125 char val[TCP_CA_NAME_MAX];
126 ctl_table tbl = {
127 .data = val,
128 .maxlen = TCP_CA_NAME_MAX,
129 };
130 int ret;
131
132 tcp_get_default_congestion_control(val);
133
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700134 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700135 if (write && ret == 0)
136 ret = tcp_set_default_congestion_control(val);
137 return ret;
138}
139
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800140static int proc_tcp_available_congestion_control(ctl_table *ctl,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700141 int write,
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800142 void __user *buffer, size_t *lenp,
143 loff_t *ppos)
144{
145 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
146 int ret;
147
148 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
149 if (!tbl.data)
150 return -ENOMEM;
151 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700152 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800153 kfree(tbl.data);
154 return ret;
155}
156
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800157static int proc_allowed_congestion_control(ctl_table *ctl,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700158 int write,
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800159 void __user *buffer, size_t *lenp,
160 loff_t *ppos)
161{
162 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
163 int ret;
164
165 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
166 if (!tbl.data)
167 return -ENOMEM;
168
169 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700170 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800171 if (write && ret == 0)
172 ret = tcp_set_allowed_congestion_control(tbl.data);
173 kfree(tbl.data);
174 return ret;
175}
176
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800177static struct ctl_table ipv4_table[] = {
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900178 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 .procname = "tcp_timestamps",
180 .data = &sysctl_tcp_timestamps,
181 .maxlen = sizeof(int),
182 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800183 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900185 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 .procname = "tcp_window_scaling",
187 .data = &sysctl_tcp_window_scaling,
188 .maxlen = sizeof(int),
189 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800190 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900192 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 .procname = "tcp_sack",
194 .data = &sysctl_tcp_sack,
195 .maxlen = sizeof(int),
196 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800197 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900199 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 .procname = "tcp_retrans_collapse",
201 .data = &sysctl_tcp_retrans_collapse,
202 .maxlen = sizeof(int),
203 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800204 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900206 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 .procname = "ip_default_ttl",
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900208 .data = &sysctl_ip_default_ttl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 .maxlen = sizeof(int),
210 .mode = 0644,
Eric Dumazet249fab72010-12-13 12:16:14 -0800211 .proc_handler = proc_dointvec_minmax,
212 .extra1 = &ip_ttl_min,
213 .extra2 = &ip_ttl_max,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900215 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 .procname = "ip_no_pmtu_disc",
217 .data = &ipv4_config.no_pmtu_disc,
218 .maxlen = sizeof(int),
219 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800220 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 },
222 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 .procname = "ip_nonlocal_bind",
224 .data = &sysctl_ip_nonlocal_bind,
225 .maxlen = sizeof(int),
226 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800227 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 },
229 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 .procname = "tcp_syn_retries",
231 .data = &sysctl_tcp_syn_retries,
232 .maxlen = sizeof(int),
233 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800234 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 },
236 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 .procname = "tcp_synack_retries",
238 .data = &sysctl_tcp_synack_retries,
239 .maxlen = sizeof(int),
240 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800241 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 },
243 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 .procname = "tcp_max_orphans",
245 .data = &sysctl_tcp_max_orphans,
246 .maxlen = sizeof(int),
247 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800248 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 },
250 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 .procname = "tcp_max_tw_buckets",
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -0700252 .data = &tcp_death_row.sysctl_max_tw_buckets,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 .maxlen = sizeof(int),
254 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800255 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 },
257 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 .procname = "ip_dynaddr",
259 .data = &sysctl_ip_dynaddr,
260 .maxlen = sizeof(int),
261 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800262 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 },
264 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 .procname = "tcp_keepalive_time",
266 .data = &sysctl_tcp_keepalive_time,
267 .maxlen = sizeof(int),
268 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800269 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 },
271 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 .procname = "tcp_keepalive_probes",
273 .data = &sysctl_tcp_keepalive_probes,
274 .maxlen = sizeof(int),
275 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800276 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 },
278 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 .procname = "tcp_keepalive_intvl",
280 .data = &sysctl_tcp_keepalive_intvl,
281 .maxlen = sizeof(int),
282 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800283 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 },
285 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 .procname = "tcp_retries1",
287 .data = &sysctl_tcp_retries1,
288 .maxlen = sizeof(int),
289 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800290 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 .extra2 = &tcp_retr1_max
292 },
293 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 .procname = "tcp_retries2",
295 .data = &sysctl_tcp_retries2,
296 .maxlen = sizeof(int),
297 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800298 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 },
300 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 .procname = "tcp_fin_timeout",
302 .data = &sysctl_tcp_fin_timeout,
303 .maxlen = sizeof(int),
304 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800305 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 },
307#ifdef CONFIG_SYN_COOKIES
308 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 .procname = "tcp_syncookies",
310 .data = &sysctl_tcp_syncookies,
311 .maxlen = sizeof(int),
312 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800313 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 },
315#endif
316 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 .procname = "tcp_tw_recycle",
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -0700318 .data = &tcp_death_row.sysctl_tw_recycle,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 .maxlen = sizeof(int),
320 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800321 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 },
323 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 .procname = "tcp_abort_on_overflow",
325 .data = &sysctl_tcp_abort_on_overflow,
326 .maxlen = sizeof(int),
327 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800328 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 },
330 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 .procname = "tcp_stdurg",
332 .data = &sysctl_tcp_stdurg,
333 .maxlen = sizeof(int),
334 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800335 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 },
337 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 .procname = "tcp_rfc1337",
339 .data = &sysctl_tcp_rfc1337,
340 .maxlen = sizeof(int),
341 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800342 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 },
344 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 .procname = "tcp_max_syn_backlog",
346 .data = &sysctl_max_syn_backlog,
347 .maxlen = sizeof(int),
348 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800349 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 },
351 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 .procname = "ip_local_port_range",
Eric Dumazet3c689b72008-10-08 14:18:04 -0700353 .data = &sysctl_local_ports.range,
354 .maxlen = sizeof(sysctl_local_ports.range),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800356 .proc_handler = ipv4_local_port_range,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 },
Amerigo Wange3826f12010-05-05 00:27:06 +0000358 {
359 .procname = "ip_local_reserved_ports",
360 .data = NULL, /* initialized in sysctl_ipv4_init */
361 .maxlen = 65536,
362 .mode = 0644,
363 .proc_handler = proc_do_large_bitmap,
364 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 .procname = "igmp_max_memberships",
367 .data = &sysctl_igmp_max_memberships,
368 .maxlen = sizeof(int),
369 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800370 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 .procname = "igmp_max_msf",
374 .data = &sysctl_igmp_max_msf,
375 .maxlen = sizeof(int),
376 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800377 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 },
379 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 .procname = "inet_peer_threshold",
381 .data = &inet_peer_threshold,
382 .maxlen = sizeof(int),
383 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800384 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 },
386 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 .procname = "inet_peer_minttl",
388 .data = &inet_peer_minttl,
389 .maxlen = sizeof(int),
390 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800391 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 },
393 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 .procname = "inet_peer_maxttl",
395 .data = &inet_peer_maxttl,
396 .maxlen = sizeof(int),
397 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800398 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 },
400 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 .procname = "tcp_orphan_retries",
402 .data = &sysctl_tcp_orphan_retries,
403 .maxlen = sizeof(int),
404 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800405 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 },
407 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 .procname = "tcp_fack",
409 .data = &sysctl_tcp_fack,
410 .maxlen = sizeof(int),
411 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800412 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 },
414 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 .procname = "tcp_reordering",
416 .data = &sysctl_tcp_reordering,
417 .maxlen = sizeof(int),
418 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800419 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 },
421 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 .procname = "tcp_ecn",
423 .data = &sysctl_tcp_ecn,
424 .maxlen = sizeof(int),
425 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800426 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 },
428 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 .procname = "tcp_dsack",
430 .data = &sysctl_tcp_dsack,
431 .maxlen = sizeof(int),
432 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800433 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 },
435 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 .procname = "tcp_mem",
437 .data = &sysctl_tcp_mem,
438 .maxlen = sizeof(sysctl_tcp_mem),
439 .mode = 0644,
Eric Dumazet8d987e52010-11-09 23:24:26 +0000440 .proc_handler = proc_doulongvec_minmax
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 },
442 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 .procname = "tcp_wmem",
444 .data = &sysctl_tcp_wmem,
445 .maxlen = sizeof(sysctl_tcp_wmem),
446 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800447 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 },
449 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 .procname = "tcp_rmem",
451 .data = &sysctl_tcp_rmem,
452 .maxlen = sizeof(sysctl_tcp_rmem),
453 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800454 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 },
456 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 .procname = "tcp_app_win",
458 .data = &sysctl_tcp_app_win,
459 .maxlen = sizeof(int),
460 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800461 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 },
463 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 .procname = "tcp_adv_win_scale",
465 .data = &sysctl_tcp_adv_win_scale,
466 .maxlen = sizeof(int),
467 .mode = 0644,
Alexey Dobriyan0147fc02010-11-22 12:54:21 +0000468 .proc_handler = proc_dointvec_minmax,
469 .extra1 = &tcp_adv_win_scale_min,
470 .extra2 = &tcp_adv_win_scale_max,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 },
472 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 .procname = "tcp_tw_reuse",
474 .data = &sysctl_tcp_tw_reuse,
475 .maxlen = sizeof(int),
476 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800477 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 },
479 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 .procname = "tcp_frto",
481 .data = &sysctl_tcp_frto,
482 .maxlen = sizeof(int),
483 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800484 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 },
486 {
Ilpo Järvinen3cfe3ba2007-02-27 10:09:49 -0800487 .procname = "tcp_frto_response",
488 .data = &sysctl_tcp_frto_response,
489 .maxlen = sizeof(int),
490 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800491 .proc_handler = proc_dointvec
Ilpo Järvinen3cfe3ba2007-02-27 10:09:49 -0800492 },
493 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 .procname = "tcp_low_latency",
495 .data = &sysctl_tcp_low_latency,
496 .maxlen = sizeof(int),
497 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800498 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 },
500 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 .procname = "tcp_no_metrics_save",
502 .data = &sysctl_tcp_nometrics_save,
503 .maxlen = sizeof(int),
504 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800505 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 },
507 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 .procname = "tcp_moderate_rcvbuf",
509 .data = &sysctl_tcp_moderate_rcvbuf,
510 .maxlen = sizeof(int),
511 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800512 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 },
514 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 .procname = "tcp_tso_win_divisor",
516 .data = &sysctl_tcp_tso_win_divisor,
517 .maxlen = sizeof(int),
518 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800519 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 },
521 {
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700522 .procname = "tcp_congestion_control",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 .mode = 0644,
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700524 .maxlen = TCP_CA_NAME_MAX,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800525 .proc_handler = proc_tcp_congestion_control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 },
Stephen Hemminger9772efb2005-11-10 17:09:53 -0800527 {
Stephen Hemminger9772efb2005-11-10 17:09:53 -0800528 .procname = "tcp_abc",
529 .data = &sysctl_tcp_abc,
530 .maxlen = sizeof(int),
531 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800532 .proc_handler = proc_dointvec,
Stephen Hemminger9772efb2005-11-10 17:09:53 -0800533 },
John Heffner5d424d52006-03-20 17:53:41 -0800534 {
John Heffner5d424d52006-03-20 17:53:41 -0800535 .procname = "tcp_mtu_probing",
536 .data = &sysctl_tcp_mtu_probing,
537 .maxlen = sizeof(int),
538 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800539 .proc_handler = proc_dointvec,
John Heffner5d424d52006-03-20 17:53:41 -0800540 },
541 {
John Heffner5d424d52006-03-20 17:53:41 -0800542 .procname = "tcp_base_mss",
543 .data = &sysctl_tcp_base_mss,
544 .maxlen = sizeof(int),
545 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800546 .proc_handler = proc_dointvec,
John Heffner5d424d52006-03-20 17:53:41 -0800547 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900548 {
Rick Jones15d99e02006-03-20 22:40:29 -0800549 .procname = "tcp_workaround_signed_windows",
550 .data = &sysctl_tcp_workaround_signed_windows,
551 .maxlen = sizeof(int),
552 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800553 .proc_handler = proc_dointvec
Rick Jones15d99e02006-03-20 22:40:29 -0800554 },
Chris Leech95937822006-05-23 18:02:55 -0700555#ifdef CONFIG_NET_DMA
556 {
Chris Leech95937822006-05-23 18:02:55 -0700557 .procname = "tcp_dma_copybreak",
558 .data = &sysctl_tcp_dma_copybreak,
559 .maxlen = sizeof(int),
560 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800561 .proc_handler = proc_dointvec
Chris Leech95937822006-05-23 18:02:55 -0700562 },
563#endif
David S. Miller35089bb2006-06-13 22:33:04 -0700564 {
David S. Miller35089bb2006-06-13 22:33:04 -0700565 .procname = "tcp_slow_start_after_idle",
566 .data = &sysctl_tcp_slow_start_after_idle,
567 .maxlen = sizeof(int),
568 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800569 .proc_handler = proc_dointvec
David S. Miller35089bb2006-06-13 22:33:04 -0700570 },
Paul Moore446fda42006-08-03 16:48:06 -0700571#ifdef CONFIG_NETLABEL
572 {
Paul Moore446fda42006-08-03 16:48:06 -0700573 .procname = "cipso_cache_enable",
574 .data = &cipso_v4_cache_enabled,
575 .maxlen = sizeof(int),
576 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800577 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700578 },
579 {
Paul Moore446fda42006-08-03 16:48:06 -0700580 .procname = "cipso_cache_bucket_size",
581 .data = &cipso_v4_cache_bucketsize,
582 .maxlen = sizeof(int),
583 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800584 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700585 },
586 {
Paul Moore446fda42006-08-03 16:48:06 -0700587 .procname = "cipso_rbm_optfmt",
588 .data = &cipso_v4_rbm_optfmt,
589 .maxlen = sizeof(int),
590 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800591 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700592 },
593 {
Paul Moore446fda42006-08-03 16:48:06 -0700594 .procname = "cipso_rbm_strictvalid",
595 .data = &cipso_v4_rbm_strictvalid,
596 .maxlen = sizeof(int),
597 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800598 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700599 },
600#endif /* CONFIG_NETLABEL */
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800601 {
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800602 .procname = "tcp_available_congestion_control",
603 .maxlen = TCP_CA_BUF_MAX,
604 .mode = 0444,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800605 .proc_handler = proc_tcp_available_congestion_control,
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800606 },
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800607 {
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800608 .procname = "tcp_allowed_congestion_control",
609 .maxlen = TCP_CA_BUF_MAX,
610 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800611 .proc_handler = proc_allowed_congestion_control,
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800612 },
John Heffner886236c2007-03-25 19:21:45 -0700613 {
John Heffner886236c2007-03-25 19:21:45 -0700614 .procname = "tcp_max_ssthresh",
615 .data = &sysctl_tcp_max_ssthresh,
616 .maxlen = sizeof(int),
617 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800618 .proc_handler = proc_dointvec,
John Heffner886236c2007-03-25 19:21:45 -0700619 },
Hideo Aoki95766ff2007-12-31 00:29:24 -0800620 {
William Allen Simpson519855c2009-12-02 18:14:19 +0000621 .procname = "tcp_cookie_size",
622 .data = &sysctl_tcp_cookie_size,
623 .maxlen = sizeof(int),
624 .mode = 0644,
625 .proc_handler = proc_dointvec
626 },
627 {
Andreas Petlund36e31b0a2010-02-18 02:47:01 +0000628 .procname = "tcp_thin_linear_timeouts",
629 .data = &sysctl_tcp_thin_linear_timeouts,
630 .maxlen = sizeof(int),
631 .mode = 0644,
632 .proc_handler = proc_dointvec
633 },
Andreas Petlund7e380172010-02-18 04:48:19 +0000634 {
635 .procname = "tcp_thin_dupack",
636 .data = &sysctl_tcp_thin_dupack,
637 .maxlen = sizeof(int),
638 .mode = 0644,
639 .proc_handler = proc_dointvec
640 },
Andreas Petlund36e31b0a2010-02-18 02:47:01 +0000641 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800642 .procname = "udp_mem",
643 .data = &sysctl_udp_mem,
644 .maxlen = sizeof(sysctl_udp_mem),
645 .mode = 0644,
Eric Dumazet8d987e52010-11-09 23:24:26 +0000646 .proc_handler = proc_doulongvec_minmax,
Hideo Aoki95766ff2007-12-31 00:29:24 -0800647 },
648 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800649 .procname = "udp_rmem_min",
650 .data = &sysctl_udp_rmem_min,
651 .maxlen = sizeof(sysctl_udp_rmem_min),
652 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800653 .proc_handler = proc_dointvec_minmax,
Hideo Aoki95766ff2007-12-31 00:29:24 -0800654 .extra1 = &zero
655 },
656 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800657 .procname = "udp_wmem_min",
658 .data = &sysctl_udp_wmem_min,
659 .maxlen = sizeof(sysctl_udp_wmem_min),
660 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800661 .proc_handler = proc_dointvec_minmax,
Hideo Aoki95766ff2007-12-31 00:29:24 -0800662 .extra1 = &zero
663 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800664 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665};
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800666
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700667static struct ctl_table ipv4_net_table[] = {
668 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700669 .procname = "icmp_echo_ignore_all",
670 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
671 .maxlen = sizeof(int),
672 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800673 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700674 },
675 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700676 .procname = "icmp_echo_ignore_broadcasts",
677 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
678 .maxlen = sizeof(int),
679 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800680 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700681 },
682 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700683 .procname = "icmp_ignore_bogus_error_responses",
684 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
685 .maxlen = sizeof(int),
686 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800687 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700688 },
689 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700690 .procname = "icmp_errors_use_inbound_ifaddr",
691 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
692 .maxlen = sizeof(int),
693 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800694 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700695 },
696 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700697 .procname = "icmp_ratelimit",
698 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
699 .maxlen = sizeof(int),
700 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800701 .proc_handler = proc_dointvec_ms_jiffies,
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700702 },
703 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700704 .procname = "icmp_ratemask",
705 .data = &init_net.ipv4.sysctl_icmp_ratemask,
706 .maxlen = sizeof(int),
707 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800708 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700709 },
Neil Horman1080d702008-10-27 12:28:25 -0700710 {
Neil Horman1080d702008-10-27 12:28:25 -0700711 .procname = "rt_cache_rebuild_count",
712 .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count,
713 .maxlen = sizeof(int),
714 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800715 .proc_handler = proc_dointvec
Neil Horman1080d702008-10-27 12:28:25 -0700716 },
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000717 {
718 .procname = "ping_group_range",
719 .data = &init_net.ipv4.sysctl_ping_group_range,
720 .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range),
721 .mode = 0644,
722 .proc_handler = ipv4_ping_group_range,
723 },
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700724 { }
725};
726
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800727struct ctl_path net_ipv4_ctl_path[] = {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800728 { .procname = "net", },
729 { .procname = "ipv4", },
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800730 { },
731};
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800732EXPORT_SYMBOL_GPL(net_ipv4_ctl_path);
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800733
Pavel Emelyanov15775192008-03-26 01:54:18 -0700734static __net_init int ipv4_sysctl_init_net(struct net *net)
735{
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700736 struct ctl_table *table;
737
738 table = ipv4_net_table;
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800739 if (!net_eq(net, &init_net)) {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700740 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
741 if (table == NULL)
742 goto err_alloc;
743
744 table[0].data =
745 &net->ipv4.sysctl_icmp_echo_ignore_all;
746 table[1].data =
747 &net->ipv4.sysctl_icmp_echo_ignore_broadcasts;
748 table[2].data =
749 &net->ipv4.sysctl_icmp_ignore_bogus_error_responses;
750 table[3].data =
751 &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr;
752 table[4].data =
753 &net->ipv4.sysctl_icmp_ratelimit;
754 table[5].data =
755 &net->ipv4.sysctl_icmp_ratemask;
Neil Horman1080d702008-10-27 12:28:25 -0700756 table[6].data =
757 &net->ipv4.sysctl_rt_cache_rebuild_count;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000758 table[7].data =
759 &net->ipv4.sysctl_ping_group_range;
760
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700761 }
762
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000763 /*
764 * Sane defaults - nobody may create ping sockets.
765 * Boot scripts should set this to distro-specific group.
766 */
767 net->ipv4.sysctl_ping_group_range[0] = 1;
768 net->ipv4.sysctl_ping_group_range[1] = 0;
769
Neil Horman1080d702008-10-27 12:28:25 -0700770 net->ipv4.sysctl_rt_cache_rebuild_count = 4;
771
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700772 net->ipv4.ipv4_hdr = register_net_sysctl_table(net,
773 net_ipv4_ctl_path, table);
774 if (net->ipv4.ipv4_hdr == NULL)
775 goto err_reg;
776
Pavel Emelyanov15775192008-03-26 01:54:18 -0700777 return 0;
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700778
779err_reg:
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800780 if (!net_eq(net, &init_net))
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700781 kfree(table);
782err_alloc:
783 return -ENOMEM;
Pavel Emelyanov15775192008-03-26 01:54:18 -0700784}
785
786static __net_exit void ipv4_sysctl_exit_net(struct net *net)
787{
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700788 struct ctl_table *table;
789
790 table = net->ipv4.ipv4_hdr->ctl_table_arg;
791 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
792 kfree(table);
Pavel Emelyanov15775192008-03-26 01:54:18 -0700793}
794
795static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
796 .init = ipv4_sysctl_init_net,
797 .exit = ipv4_sysctl_exit_net,
798};
799
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800800static __init int sysctl_ipv4_init(void)
801{
802 struct ctl_table_header *hdr;
Amerigo Wange3826f12010-05-05 00:27:06 +0000803 struct ctl_table *i;
804
805 for (i = ipv4_table; i->procname; i++) {
806 if (strcmp(i->procname, "ip_local_reserved_ports") == 0) {
807 i->data = sysctl_local_reserved_ports;
808 break;
809 }
810 }
811 if (!i->procname)
812 return -EINVAL;
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800813
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -0800814 hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table);
Pavel Emelyanov15775192008-03-26 01:54:18 -0700815 if (hdr == NULL)
816 return -ENOMEM;
817
818 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
819 unregister_sysctl_table(hdr);
820 return -ENOMEM;
821 }
822
823 return 0;
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800824}
825
826__initcall(sysctl_ipv4_init);