blob: 1d2480ac2bb6979921f954e476464f481ea94449 [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>
Glauber Costa3dc43e32011-12-11 21:47:05 +000017#include <linux/swap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <net/snmp.h>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030019#include <net/icmp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <net/ip.h>
21#include <net/route.h>
22#include <net/tcp.h>
Hideo Aoki95766ff2007-12-31 00:29:24 -080023#include <net/udp.h>
Paul Moore446fda42006-08-03 16:48:06 -070024#include <net/cipso_ipv4.h>
Pavel Emelyanov04128f22007-10-15 02:33:45 -070025#include <net/inet_frag.h>
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000026#include <net/ping.h>
Glauber Costa3aaabe22011-12-11 21:47:06 +000027#include <net/tcp_memcontrol.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Herbert Xu89cee8b2005-12-13 23:14:27 -080029static int zero;
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +000030static int one = 1;
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +000031static int four = 4;
Eric Dumazet95bd09e2013-08-27 05:46:32 -070032static int gso_max_segs = GSO_MAX_SEGS;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +090033static int tcp_retr1_max = 255;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034static int ip_local_port_range_min[] = { 1, 1 };
35static int ip_local_port_range_max[] = { 65535, 65535 };
Alexey Dobriyan0147fc02010-11-22 12:54:21 +000036static int tcp_adv_win_scale_min = -31;
37static int tcp_adv_win_scale_max = 31;
Eric Dumazet249fab72010-12-13 12:16:14 -080038static int ip_ttl_min = 1;
39static int ip_ttl_max = 255;
Michal Tesar651e9272013-07-19 14:09:01 +020040static int tcp_syn_retries_min = 1;
41static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000042static int ip_ping_group_range_min[] = { 0, 0 };
43static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Stephen Hemminger227b60f2007-10-10 17:30:46 -070045/* Update system visible IP port range */
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070046static void set_local_port_range(struct net *net, int range[2])
Stephen Hemminger227b60f2007-10-10 17:30:46 -070047{
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070048 write_seqlock(&net->ipv4.sysctl_local_ports.lock);
49 net->ipv4.sysctl_local_ports.range[0] = range[0];
50 net->ipv4.sysctl_local_ports.range[1] = range[1];
51 write_sequnlock(&net->ipv4.sysctl_local_ports.lock);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070052}
53
54/* Validate changes from /proc interface. */
Joe Perchesfe2c6332013-06-11 23:04:25 -070055static int ipv4_local_port_range(struct ctl_table *table, int write,
Stephen Hemminger227b60f2007-10-10 17:30:46 -070056 void __user *buffer,
57 size_t *lenp, loff_t *ppos)
58{
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070059 struct net *net =
60 container_of(table->data, struct net, ipv4.sysctl_local_ports.range);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070061 int ret;
Eric Dumazet3c689b72008-10-08 14:18:04 -070062 int range[2];
Joe Perchesfe2c6332013-06-11 23:04:25 -070063 struct ctl_table tmp = {
Stephen Hemminger227b60f2007-10-10 17:30:46 -070064 .data = &range,
65 .maxlen = sizeof(range),
66 .mode = table->mode,
67 .extra1 = &ip_local_port_range_min,
68 .extra2 = &ip_local_port_range_max,
69 };
70
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070071 inet_get_local_port_range(net, &range[0], &range[1]);
72
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070073 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070074
75 if (write && ret == 0) {
Anton Arapova25de532007-10-18 22:00:17 -070076 if (range[1] < range[0])
Stephen Hemminger227b60f2007-10-10 17:30:46 -070077 ret = -EINVAL;
78 else
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070079 set_local_port_range(net, range);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070080 }
81
82 return ret;
83}
84
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000085
Eric W. Biederman7064d162012-05-24 10:34:21 -060086static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000087{
Eric W. Biederman7064d162012-05-24 10:34:21 -060088 kgid_t *data = table->data;
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070089 struct net *net =
90 container_of(table->data, struct net, ipv4.sysctl_ping_group_range);
Eric Dumazet95c96172012-04-15 05:58:06 +000091 unsigned int seq;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000092 do {
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070093 seq = read_seqbegin(&net->ipv4.sysctl_local_ports.lock);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000094
95 *low = data[0];
96 *high = data[1];
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070097 } while (read_seqretry(&net->ipv4.sysctl_local_ports.lock, seq));
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000098}
99
100/* Update system visible IP port range */
Eric W. Biederman7064d162012-05-24 10:34:21 -0600101static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000102{
Eric W. Biederman7064d162012-05-24 10:34:21 -0600103 kgid_t *data = table->data;
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700104 struct net *net =
105 container_of(table->data, struct net, ipv4.sysctl_ping_group_range);
106 write_seqlock(&net->ipv4.sysctl_local_ports.lock);
Eric W. Biederman7064d162012-05-24 10:34:21 -0600107 data[0] = low;
108 data[1] = high;
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700109 write_sequnlock(&net->ipv4.sysctl_local_ports.lock);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000110}
111
112/* Validate changes from /proc interface. */
Joe Perchesfe2c6332013-06-11 23:04:25 -0700113static int ipv4_ping_group_range(struct ctl_table *table, int write,
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000114 void __user *buffer,
115 size_t *lenp, loff_t *ppos)
116{
Eric W. Biederman7064d162012-05-24 10:34:21 -0600117 struct user_namespace *user_ns = current_user_ns();
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000118 int ret;
Eric W. Biederman7064d162012-05-24 10:34:21 -0600119 gid_t urange[2];
120 kgid_t low, high;
Joe Perchesfe2c6332013-06-11 23:04:25 -0700121 struct ctl_table tmp = {
Eric W. Biederman7064d162012-05-24 10:34:21 -0600122 .data = &urange,
123 .maxlen = sizeof(urange),
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000124 .mode = table->mode,
125 .extra1 = &ip_ping_group_range_min,
126 .extra2 = &ip_ping_group_range_max,
127 };
128
Eric W. Biederman7064d162012-05-24 10:34:21 -0600129 inet_get_ping_group_range_table(table, &low, &high);
130 urange[0] = from_kgid_munged(user_ns, low);
131 urange[1] = from_kgid_munged(user_ns, high);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000132 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
133
Eric W. Biederman7064d162012-05-24 10:34:21 -0600134 if (write && ret == 0) {
135 low = make_kgid(user_ns, urange[0]);
136 high = make_kgid(user_ns, urange[1]);
137 if (!gid_valid(low) || !gid_valid(high) ||
138 (urange[1] < urange[0]) || gid_lt(high, low)) {
139 low = make_kgid(&init_user_ns, 1);
140 high = make_kgid(&init_user_ns, 0);
141 }
142 set_ping_group_range(table, low, high);
143 }
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000144
145 return ret;
146}
147
Joe Perchesfe2c6332013-06-11 23:04:25 -0700148static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700149 void __user *buffer, size_t *lenp, loff_t *ppos)
150{
151 char val[TCP_CA_NAME_MAX];
Joe Perchesfe2c6332013-06-11 23:04:25 -0700152 struct ctl_table tbl = {
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700153 .data = val,
154 .maxlen = TCP_CA_NAME_MAX,
155 };
156 int ret;
157
158 tcp_get_default_congestion_control(val);
159
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700160 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700161 if (write && ret == 0)
162 ret = tcp_set_default_congestion_control(val);
163 return ret;
164}
165
Joe Perchesfe2c6332013-06-11 23:04:25 -0700166static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700167 int write,
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800168 void __user *buffer, size_t *lenp,
169 loff_t *ppos)
170{
Joe Perchesfe2c6332013-06-11 23:04:25 -0700171 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800172 int ret;
173
174 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
175 if (!tbl.data)
176 return -ENOMEM;
177 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700178 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800179 kfree(tbl.data);
180 return ret;
181}
182
Joe Perchesfe2c6332013-06-11 23:04:25 -0700183static int proc_allowed_congestion_control(struct ctl_table *ctl,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700184 int write,
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800185 void __user *buffer, size_t *lenp,
186 loff_t *ppos)
187{
Joe Perchesfe2c6332013-06-11 23:04:25 -0700188 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800189 int ret;
190
191 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
192 if (!tbl.data)
193 return -ENOMEM;
194
195 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700196 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800197 if (write && ret == 0)
198 ret = tcp_set_allowed_congestion_control(tbl.data);
199 kfree(tbl.data);
200 return ret;
201}
202
Joe Perchesfe2c6332013-06-11 23:04:25 -0700203static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write,
204 void __user *buffer, size_t *lenp,
205 loff_t *ppos)
Jerry Chu10467162012-08-31 12:29:11 +0000206{
Joe Perchesfe2c6332013-06-11 23:04:25 -0700207 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
Jerry Chu10467162012-08-31 12:29:11 +0000208 struct tcp_fastopen_context *ctxt;
209 int ret;
210 u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
211
212 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
213 if (!tbl.data)
214 return -ENOMEM;
215
216 rcu_read_lock();
217 ctxt = rcu_dereference(tcp_fastopen_ctx);
218 if (ctxt)
219 memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
Alan Cox0e24c4f2012-10-11 06:24:14 +0000220 else
221 memset(user_key, 0, sizeof(user_key));
Jerry Chu10467162012-08-31 12:29:11 +0000222 rcu_read_unlock();
223
224 snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
225 user_key[0], user_key[1], user_key[2], user_key[3]);
226 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
227
228 if (write && ret == 0) {
229 if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
230 user_key + 2, user_key + 3) != 4) {
231 ret = -EINVAL;
232 goto bad_key;
233 }
Hannes Frederic Sowa222e83d2013-10-19 21:48:58 +0200234 /* Generate a dummy secret but don't publish it. This
235 * is needed so we don't regenerate a new key on the
236 * first invocation of tcp_fastopen_cookie_gen
237 */
238 tcp_fastopen_init_key_once(false);
Jerry Chu10467162012-08-31 12:29:11 +0000239 tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH);
240 }
241
242bad_key:
243 pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
244 user_key[0], user_key[1], user_key[2], user_key[3],
245 (char *)tbl.data, ret);
246 kfree(tbl.data);
247 return ret;
248}
249
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800250static struct ctl_table ipv4_table[] = {
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900251 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 .procname = "tcp_timestamps",
253 .data = &sysctl_tcp_timestamps,
254 .maxlen = sizeof(int),
255 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800256 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900258 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 .procname = "tcp_window_scaling",
260 .data = &sysctl_tcp_window_scaling,
261 .maxlen = sizeof(int),
262 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800263 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900265 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 .procname = "tcp_sack",
267 .data = &sysctl_tcp_sack,
268 .maxlen = sizeof(int),
269 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800270 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900272 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 .procname = "tcp_retrans_collapse",
274 .data = &sysctl_tcp_retrans_collapse,
275 .maxlen = sizeof(int),
276 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800277 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900279 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 .procname = "ip_default_ttl",
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900281 .data = &sysctl_ip_default_ttl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 .maxlen = sizeof(int),
283 .mode = 0644,
Eric Dumazet249fab72010-12-13 12:16:14 -0800284 .proc_handler = proc_dointvec_minmax,
285 .extra1 = &ip_ttl_min,
286 .extra2 = &ip_ttl_max,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900288 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 .procname = "ip_nonlocal_bind",
290 .data = &sysctl_ip_nonlocal_bind,
291 .maxlen = sizeof(int),
292 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800293 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 },
295 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 .procname = "tcp_syn_retries",
297 .data = &sysctl_tcp_syn_retries,
298 .maxlen = sizeof(int),
299 .mode = 0644,
Michal Tesar651e9272013-07-19 14:09:01 +0200300 .proc_handler = proc_dointvec_minmax,
301 .extra1 = &tcp_syn_retries_min,
302 .extra2 = &tcp_syn_retries_max
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 },
304 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 .procname = "tcp_synack_retries",
306 .data = &sysctl_tcp_synack_retries,
307 .maxlen = sizeof(int),
308 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800309 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 },
311 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 .procname = "tcp_max_orphans",
313 .data = &sysctl_tcp_max_orphans,
314 .maxlen = sizeof(int),
315 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800316 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 },
318 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 .procname = "tcp_max_tw_buckets",
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -0700320 .data = &tcp_death_row.sysctl_max_tw_buckets,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 .maxlen = sizeof(int),
322 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800323 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 },
325 {
Alexander Duyck6648bd72012-06-21 13:58:31 +0000326 .procname = "ip_early_demux",
327 .data = &sysctl_ip_early_demux,
328 .maxlen = sizeof(int),
329 .mode = 0644,
330 .proc_handler = proc_dointvec
331 },
332 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 .procname = "ip_dynaddr",
334 .data = &sysctl_ip_dynaddr,
335 .maxlen = sizeof(int),
336 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800337 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 },
339 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 .procname = "tcp_keepalive_time",
341 .data = &sysctl_tcp_keepalive_time,
342 .maxlen = sizeof(int),
343 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800344 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 },
346 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 .procname = "tcp_keepalive_probes",
348 .data = &sysctl_tcp_keepalive_probes,
349 .maxlen = sizeof(int),
350 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800351 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 },
353 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 .procname = "tcp_keepalive_intvl",
355 .data = &sysctl_tcp_keepalive_intvl,
356 .maxlen = sizeof(int),
357 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800358 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 },
360 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 .procname = "tcp_retries1",
362 .data = &sysctl_tcp_retries1,
363 .maxlen = sizeof(int),
364 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800365 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 .extra2 = &tcp_retr1_max
367 },
368 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 .procname = "tcp_retries2",
370 .data = &sysctl_tcp_retries2,
371 .maxlen = sizeof(int),
372 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800373 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 },
375 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 .procname = "tcp_fin_timeout",
377 .data = &sysctl_tcp_fin_timeout,
378 .maxlen = sizeof(int),
379 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800380 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 },
382#ifdef CONFIG_SYN_COOKIES
383 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 .procname = "tcp_syncookies",
385 .data = &sysctl_tcp_syncookies,
386 .maxlen = sizeof(int),
387 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800388 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 },
390#endif
391 {
Yuchung Cheng2100c8d2012-07-19 06:43:05 +0000392 .procname = "tcp_fastopen",
393 .data = &sysctl_tcp_fastopen,
394 .maxlen = sizeof(int),
395 .mode = 0644,
396 .proc_handler = proc_dointvec,
397 },
398 {
Jerry Chu10467162012-08-31 12:29:11 +0000399 .procname = "tcp_fastopen_key",
400 .mode = 0600,
401 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
402 .proc_handler = proc_tcp_fastopen_key,
403 },
404 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 .procname = "tcp_tw_recycle",
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -0700406 .data = &tcp_death_row.sysctl_tw_recycle,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 .maxlen = sizeof(int),
408 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800409 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 },
411 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 .procname = "tcp_abort_on_overflow",
413 .data = &sysctl_tcp_abort_on_overflow,
414 .maxlen = sizeof(int),
415 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800416 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 },
418 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 .procname = "tcp_stdurg",
420 .data = &sysctl_tcp_stdurg,
421 .maxlen = sizeof(int),
422 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800423 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 },
425 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 .procname = "tcp_rfc1337",
427 .data = &sysctl_tcp_rfc1337,
428 .maxlen = sizeof(int),
429 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800430 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 },
432 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 .procname = "tcp_max_syn_backlog",
434 .data = &sysctl_max_syn_backlog,
435 .maxlen = sizeof(int),
436 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800437 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 },
439 {
Amerigo Wange3826f12010-05-05 00:27:06 +0000440 .procname = "ip_local_reserved_ports",
441 .data = NULL, /* initialized in sysctl_ipv4_init */
442 .maxlen = 65536,
443 .mode = 0644,
444 .proc_handler = proc_do_large_bitmap,
445 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 .procname = "igmp_max_memberships",
448 .data = &sysctl_igmp_max_memberships,
449 .maxlen = sizeof(int),
450 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800451 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 .procname = "igmp_max_msf",
455 .data = &sysctl_igmp_max_msf,
456 .maxlen = sizeof(int),
457 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800458 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 },
460 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 .procname = "inet_peer_threshold",
462 .data = &inet_peer_threshold,
463 .maxlen = sizeof(int),
464 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800465 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 },
467 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 .procname = "inet_peer_minttl",
469 .data = &inet_peer_minttl,
470 .maxlen = sizeof(int),
471 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800472 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 },
474 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 .procname = "inet_peer_maxttl",
476 .data = &inet_peer_maxttl,
477 .maxlen = sizeof(int),
478 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800479 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 },
481 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 .procname = "tcp_orphan_retries",
483 .data = &sysctl_tcp_orphan_retries,
484 .maxlen = sizeof(int),
485 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800486 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 },
488 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 .procname = "tcp_fack",
490 .data = &sysctl_tcp_fack,
491 .maxlen = sizeof(int),
492 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800493 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 },
495 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 .procname = "tcp_reordering",
497 .data = &sysctl_tcp_reordering,
498 .maxlen = sizeof(int),
499 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800500 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 },
502 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 .procname = "tcp_dsack",
504 .data = &sysctl_tcp_dsack,
505 .maxlen = sizeof(int),
506 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800507 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 },
509 {
Eric W. Biedermana4fe34b2013-10-19 16:25:36 -0700510 .procname = "tcp_mem",
511 .maxlen = sizeof(sysctl_tcp_mem),
512 .data = &sysctl_tcp_mem,
513 .mode = 0644,
514 .proc_handler = proc_doulongvec_minmax,
515 },
516 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 .procname = "tcp_wmem",
518 .data = &sysctl_tcp_wmem,
519 .maxlen = sizeof(sysctl_tcp_wmem),
520 .mode = 0644,
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +0000521 .proc_handler = proc_dointvec_minmax,
522 .extra1 = &one,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 },
524 {
Eric Dumazetc9bee3b72013-07-22 20:27:07 -0700525 .procname = "tcp_notsent_lowat",
526 .data = &sysctl_tcp_notsent_lowat,
527 .maxlen = sizeof(sysctl_tcp_notsent_lowat),
528 .mode = 0644,
529 .proc_handler = proc_dointvec,
530 },
531 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 .procname = "tcp_rmem",
533 .data = &sysctl_tcp_rmem,
534 .maxlen = sizeof(sysctl_tcp_rmem),
535 .mode = 0644,
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +0000536 .proc_handler = proc_dointvec_minmax,
537 .extra1 = &one,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 },
539 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 .procname = "tcp_app_win",
541 .data = &sysctl_tcp_app_win,
542 .maxlen = sizeof(int),
543 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800544 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 },
546 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 .procname = "tcp_adv_win_scale",
548 .data = &sysctl_tcp_adv_win_scale,
549 .maxlen = sizeof(int),
550 .mode = 0644,
Alexey Dobriyan0147fc02010-11-22 12:54:21 +0000551 .proc_handler = proc_dointvec_minmax,
552 .extra1 = &tcp_adv_win_scale_min,
553 .extra2 = &tcp_adv_win_scale_max,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 },
555 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 .procname = "tcp_tw_reuse",
557 .data = &sysctl_tcp_tw_reuse,
558 .maxlen = sizeof(int),
559 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800560 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 },
562 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 .procname = "tcp_frto",
564 .data = &sysctl_tcp_frto,
565 .maxlen = sizeof(int),
566 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800567 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 },
569 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 .procname = "tcp_low_latency",
571 .data = &sysctl_tcp_low_latency,
572 .maxlen = sizeof(int),
573 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800574 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 },
576 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 .procname = "tcp_no_metrics_save",
578 .data = &sysctl_tcp_nometrics_save,
579 .maxlen = sizeof(int),
580 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800581 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 },
583 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 .procname = "tcp_moderate_rcvbuf",
585 .data = &sysctl_tcp_moderate_rcvbuf,
586 .maxlen = sizeof(int),
587 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800588 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 },
590 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 .procname = "tcp_tso_win_divisor",
592 .data = &sysctl_tcp_tso_win_divisor,
593 .maxlen = sizeof(int),
594 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800595 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 },
597 {
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700598 .procname = "tcp_congestion_control",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 .mode = 0644,
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700600 .maxlen = TCP_CA_NAME_MAX,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800601 .proc_handler = proc_tcp_congestion_control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 },
Stephen Hemminger9772efb2005-11-10 17:09:53 -0800603 {
John Heffner5d424d52006-03-20 17:53:41 -0800604 .procname = "tcp_mtu_probing",
605 .data = &sysctl_tcp_mtu_probing,
606 .maxlen = sizeof(int),
607 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800608 .proc_handler = proc_dointvec,
John Heffner5d424d52006-03-20 17:53:41 -0800609 },
610 {
John Heffner5d424d52006-03-20 17:53:41 -0800611 .procname = "tcp_base_mss",
612 .data = &sysctl_tcp_base_mss,
613 .maxlen = sizeof(int),
614 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800615 .proc_handler = proc_dointvec,
John Heffner5d424d52006-03-20 17:53:41 -0800616 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900617 {
Rick Jones15d99e02006-03-20 22:40:29 -0800618 .procname = "tcp_workaround_signed_windows",
619 .data = &sysctl_tcp_workaround_signed_windows,
620 .maxlen = sizeof(int),
621 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800622 .proc_handler = proc_dointvec
Rick Jones15d99e02006-03-20 22:40:29 -0800623 },
Eric Dumazet46d3cea2012-07-11 05:50:31 +0000624 {
625 .procname = "tcp_limit_output_bytes",
626 .data = &sysctl_tcp_limit_output_bytes,
627 .maxlen = sizeof(int),
628 .mode = 0644,
629 .proc_handler = proc_dointvec
630 },
Eric Dumazet282f23c2012-07-17 10:13:05 +0200631 {
632 .procname = "tcp_challenge_ack_limit",
633 .data = &sysctl_tcp_challenge_ack_limit,
634 .maxlen = sizeof(int),
635 .mode = 0644,
636 .proc_handler = proc_dointvec
637 },
Chris Leech95937822006-05-23 18:02:55 -0700638#ifdef CONFIG_NET_DMA
639 {
Chris Leech95937822006-05-23 18:02:55 -0700640 .procname = "tcp_dma_copybreak",
641 .data = &sysctl_tcp_dma_copybreak,
642 .maxlen = sizeof(int),
643 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800644 .proc_handler = proc_dointvec
Chris Leech95937822006-05-23 18:02:55 -0700645 },
646#endif
David S. Miller35089bb2006-06-13 22:33:04 -0700647 {
David S. Miller35089bb2006-06-13 22:33:04 -0700648 .procname = "tcp_slow_start_after_idle",
649 .data = &sysctl_tcp_slow_start_after_idle,
650 .maxlen = sizeof(int),
651 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800652 .proc_handler = proc_dointvec
David S. Miller35089bb2006-06-13 22:33:04 -0700653 },
Paul Moore446fda42006-08-03 16:48:06 -0700654#ifdef CONFIG_NETLABEL
655 {
Paul Moore446fda42006-08-03 16:48:06 -0700656 .procname = "cipso_cache_enable",
657 .data = &cipso_v4_cache_enabled,
658 .maxlen = sizeof(int),
659 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800660 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700661 },
662 {
Paul Moore446fda42006-08-03 16:48:06 -0700663 .procname = "cipso_cache_bucket_size",
664 .data = &cipso_v4_cache_bucketsize,
665 .maxlen = sizeof(int),
666 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800667 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700668 },
669 {
Paul Moore446fda42006-08-03 16:48:06 -0700670 .procname = "cipso_rbm_optfmt",
671 .data = &cipso_v4_rbm_optfmt,
672 .maxlen = sizeof(int),
673 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800674 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700675 },
676 {
Paul Moore446fda42006-08-03 16:48:06 -0700677 .procname = "cipso_rbm_strictvalid",
678 .data = &cipso_v4_rbm_strictvalid,
679 .maxlen = sizeof(int),
680 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800681 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700682 },
683#endif /* CONFIG_NETLABEL */
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800684 {
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800685 .procname = "tcp_available_congestion_control",
686 .maxlen = TCP_CA_BUF_MAX,
687 .mode = 0444,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800688 .proc_handler = proc_tcp_available_congestion_control,
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800689 },
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800690 {
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800691 .procname = "tcp_allowed_congestion_control",
692 .maxlen = TCP_CA_BUF_MAX,
693 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800694 .proc_handler = proc_allowed_congestion_control,
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800695 },
John Heffner886236c2007-03-25 19:21:45 -0700696 {
Andreas Petlund36e31b0a2010-02-18 02:47:01 +0000697 .procname = "tcp_thin_linear_timeouts",
698 .data = &sysctl_tcp_thin_linear_timeouts,
699 .maxlen = sizeof(int),
700 .mode = 0644,
701 .proc_handler = proc_dointvec
702 },
Weilong Chen5797deb2013-12-23 14:37:31 +0800703 {
Andreas Petlund7e380172010-02-18 04:48:19 +0000704 .procname = "tcp_thin_dupack",
705 .data = &sysctl_tcp_thin_dupack,
706 .maxlen = sizeof(int),
707 .mode = 0644,
708 .proc_handler = proc_dointvec
709 },
Andreas Petlund36e31b0a2010-02-18 02:47:01 +0000710 {
Yuchung Chengeed530b2012-05-02 13:30:03 +0000711 .procname = "tcp_early_retrans",
712 .data = &sysctl_tcp_early_retrans,
713 .maxlen = sizeof(int),
714 .mode = 0644,
715 .proc_handler = proc_dointvec_minmax,
716 .extra1 = &zero,
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +0000717 .extra2 = &four,
Yuchung Chengeed530b2012-05-02 13:30:03 +0000718 },
719 {
Eric Dumazet95bd09e2013-08-27 05:46:32 -0700720 .procname = "tcp_min_tso_segs",
721 .data = &sysctl_tcp_min_tso_segs,
722 .maxlen = sizeof(int),
723 .mode = 0644,
724 .proc_handler = proc_dointvec_minmax,
725 .extra1 = &zero,
726 .extra2 = &gso_max_segs,
727 },
728 {
Eric Dumazetf54b3112013-12-05 22:36:05 -0800729 .procname = "tcp_autocorking",
730 .data = &sysctl_tcp_autocorking,
731 .maxlen = sizeof(int),
732 .mode = 0644,
733 .proc_handler = proc_dointvec_minmax,
734 .extra1 = &zero,
735 .extra2 = &one,
736 },
737 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800738 .procname = "udp_mem",
739 .data = &sysctl_udp_mem,
740 .maxlen = sizeof(sysctl_udp_mem),
741 .mode = 0644,
Eric Dumazet8d987e52010-11-09 23:24:26 +0000742 .proc_handler = proc_doulongvec_minmax,
Hideo Aoki95766ff2007-12-31 00:29:24 -0800743 },
744 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800745 .procname = "udp_rmem_min",
746 .data = &sysctl_udp_rmem_min,
747 .maxlen = sizeof(sysctl_udp_rmem_min),
748 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800749 .proc_handler = proc_dointvec_minmax,
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +0000750 .extra1 = &one
Hideo Aoki95766ff2007-12-31 00:29:24 -0800751 },
752 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800753 .procname = "udp_wmem_min",
754 .data = &sysctl_udp_wmem_min,
755 .maxlen = sizeof(sysctl_udp_wmem_min),
756 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800757 .proc_handler = proc_dointvec_minmax,
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +0000758 .extra1 = &one
Hideo Aoki95766ff2007-12-31 00:29:24 -0800759 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800760 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761};
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800762
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700763static struct ctl_table ipv4_net_table[] = {
764 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700765 .procname = "icmp_echo_ignore_all",
766 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
767 .maxlen = sizeof(int),
768 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800769 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700770 },
771 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700772 .procname = "icmp_echo_ignore_broadcasts",
773 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
774 .maxlen = sizeof(int),
775 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800776 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700777 },
778 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700779 .procname = "icmp_ignore_bogus_error_responses",
780 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
781 .maxlen = sizeof(int),
782 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800783 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700784 },
785 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700786 .procname = "icmp_errors_use_inbound_ifaddr",
787 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
788 .maxlen = sizeof(int),
789 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800790 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700791 },
792 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700793 .procname = "icmp_ratelimit",
794 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
795 .maxlen = sizeof(int),
796 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800797 .proc_handler = proc_dointvec_ms_jiffies,
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700798 },
799 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700800 .procname = "icmp_ratemask",
801 .data = &init_net.ipv4.sysctl_icmp_ratemask,
802 .maxlen = sizeof(int),
803 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800804 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700805 },
Neil Horman1080d702008-10-27 12:28:25 -0700806 {
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000807 .procname = "ping_group_range",
808 .data = &init_net.ipv4.sysctl_ping_group_range,
Eric W. Biederman7064d162012-05-24 10:34:21 -0600809 .maxlen = sizeof(gid_t)*2,
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000810 .mode = 0644,
811 .proc_handler = ipv4_ping_group_range,
812 },
Glauber Costa3dc43e32011-12-11 21:47:05 +0000813 {
Hannes Frederic Sowa5d134f12013-01-05 16:10:48 +0000814 .procname = "tcp_ecn",
815 .data = &init_net.ipv4.sysctl_tcp_ecn,
816 .maxlen = sizeof(int),
817 .mode = 0644,
818 .proc_handler = proc_dointvec
819 },
820 {
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700821 .procname = "ip_local_port_range",
822 .maxlen = sizeof(init_net.ipv4.sysctl_local_ports.range),
823 .data = &init_net.ipv4.sysctl_local_ports.range,
824 .mode = 0644,
825 .proc_handler = ipv4_local_port_range,
826 },
Hannes Frederic Sowa974eda12013-12-14 05:13:38 +0100827 {
828 .procname = "ip_no_pmtu_disc",
829 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
830 .maxlen = sizeof(int),
831 .mode = 0644,
832 .proc_handler = proc_dointvec
833 },
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700834 { }
835};
836
Pavel Emelyanov15775192008-03-26 01:54:18 -0700837static __net_init int ipv4_sysctl_init_net(struct net *net)
838{
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700839 struct ctl_table *table;
840
841 table = ipv4_net_table;
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800842 if (!net_eq(net, &init_net)) {
Eric W. Biederman0a6fa232013-10-19 16:27:03 -0700843 int i;
844
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700845 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
846 if (table == NULL)
847 goto err_alloc;
848
Eric W. Biederman0a6fa232013-10-19 16:27:03 -0700849 /* Update the variables to point into the current struct net */
850 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
851 table[i].data += (void *)net - (void *)&init_net;
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700852 }
853
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000854 /*
855 * Sane defaults - nobody may create ping sockets.
856 * Boot scripts should set this to distro-specific group.
857 */
Eric W. Biederman7064d162012-05-24 10:34:21 -0600858 net->ipv4.sysctl_ping_group_range[0] = make_kgid(&init_user_ns, 1);
859 net->ipv4.sysctl_ping_group_range[1] = make_kgid(&init_user_ns, 0);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000860
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700861 /*
862 * Set defaults for local port range
863 */
864 seqlock_init(&net->ipv4.sysctl_local_ports.lock);
865 net->ipv4.sysctl_local_ports.range[0] = 32768;
866 net->ipv4.sysctl_local_ports.range[1] = 61000;
867
Eric W. Biedermanec8f23c2012-04-19 13:44:49 +0000868 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700869 if (net->ipv4.ipv4_hdr == NULL)
870 goto err_reg;
871
Pavel Emelyanov15775192008-03-26 01:54:18 -0700872 return 0;
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700873
874err_reg:
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800875 if (!net_eq(net, &init_net))
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700876 kfree(table);
877err_alloc:
878 return -ENOMEM;
Pavel Emelyanov15775192008-03-26 01:54:18 -0700879}
880
881static __net_exit void ipv4_sysctl_exit_net(struct net *net)
882{
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700883 struct ctl_table *table;
884
885 table = net->ipv4.ipv4_hdr->ctl_table_arg;
886 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
887 kfree(table);
Pavel Emelyanov15775192008-03-26 01:54:18 -0700888}
889
890static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
891 .init = ipv4_sysctl_init_net,
892 .exit = ipv4_sysctl_exit_net,
893};
894
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800895static __init int sysctl_ipv4_init(void)
896{
897 struct ctl_table_header *hdr;
Amerigo Wange3826f12010-05-05 00:27:06 +0000898 struct ctl_table *i;
899
900 for (i = ipv4_table; i->procname; i++) {
901 if (strcmp(i->procname, "ip_local_reserved_ports") == 0) {
902 i->data = sysctl_local_reserved_ports;
903 break;
904 }
905 }
906 if (!i->procname)
907 return -EINVAL;
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800908
Eric W. Biedermanec8f23c2012-04-19 13:44:49 +0000909 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
Pavel Emelyanov15775192008-03-26 01:54:18 -0700910 if (hdr == NULL)
911 return -ENOMEM;
912
913 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
Eric W. Biederman5dd3df12012-04-19 13:24:33 +0000914 unregister_net_sysctl_table(hdr);
Pavel Emelyanov15775192008-03-26 01:54:18 -0700915 return -ENOMEM;
916 }
917
918 return 0;
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800919}
920
921__initcall(sysctl_ipv4_init);