blob: 4d367b4139a34fe04cc17dfdebab5dc42a53921a [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Herbert Xu89cee8b2005-12-13 23:14:27 -080028static int zero;
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +000029static int one = 1;
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +000030static int four = 4;
Eric Dumazet43e122b2015-08-21 17:38:02 -070031static int thousand = 1000;
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 Dumazeted2dfd92015-05-27 11:34:37 -070048 bool same_parity = !((range[0] ^ range[1]) & 1);
49
WANG Cong4ee3bd42015-11-03 14:32:57 -080050 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
Eric Dumazeted2dfd92015-05-27 11:34:37 -070051 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 }
Cong Wangc9d8f1a2014-05-06 11:02:49 -070055 net->ipv4.ip_local_ports.range[0] = range[0];
56 net->ipv4.ip_local_ports.range[1] = range[1];
WANG Cong4ee3bd42015-11-03 14:32:57 -080057 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070058}
59
60/* Validate changes from /proc interface. */
Joe Perchesfe2c6332013-06-11 23:04:25 -070061static int ipv4_local_port_range(struct ctl_table *table, int write,
Stephen Hemminger227b60f2007-10-10 17:30:46 -070062 void __user *buffer,
63 size_t *lenp, loff_t *ppos)
64{
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070065 struct net *net =
Cong Wangc9d8f1a2014-05-06 11:02:49 -070066 container_of(table->data, struct net, ipv4.ip_local_ports.range);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070067 int ret;
Eric Dumazet3c689b72008-10-08 14:18:04 -070068 int range[2];
Joe Perchesfe2c6332013-06-11 23:04:25 -070069 struct ctl_table tmp = {
Stephen Hemminger227b60f2007-10-10 17:30:46 -070070 .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
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070077 inet_get_local_port_range(net, &range[0], &range[1]);
78
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070079 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070080
81 if (write && ret == 0) {
Anton Arapova25de532007-10-18 22:00:17 -070082 if (range[1] < range[0])
Stephen Hemminger227b60f2007-10-10 17:30:46 -070083 ret = -EINVAL;
84 else
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070085 set_local_port_range(net, range);
Stephen Hemminger227b60f2007-10-10 17:30:46 -070086 }
87
88 return ret;
89}
90
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000091
Eric W. Biederman7064d162012-05-24 10:34:21 -060092static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000093{
Eric W. Biederman7064d162012-05-24 10:34:21 -060094 kgid_t *data = table->data;
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -070095 struct net *net =
Cong Wangba6b9182014-05-06 11:02:50 -070096 container_of(table->data, struct net, ipv4.ping_group_range.range);
Eric Dumazet95c96172012-04-15 05:58:06 +000097 unsigned int seq;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +000098 do {
Cong Wangc9d8f1a2014-05-06 11:02:49 -070099 seq = read_seqbegin(&net->ipv4.ip_local_ports.lock);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000100
101 *low = data[0];
102 *high = data[1];
Cong Wangc9d8f1a2014-05-06 11:02:49 -0700103 } while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq));
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000104}
105
106/* Update system visible IP port range */
Eric W. Biederman7064d162012-05-24 10:34:21 -0600107static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000108{
Eric W. Biederman7064d162012-05-24 10:34:21 -0600109 kgid_t *data = table->data;
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700110 struct net *net =
Cong Wangba6b9182014-05-06 11:02:50 -0700111 container_of(table->data, struct net, ipv4.ping_group_range.range);
Cong Wangc9d8f1a2014-05-06 11:02:49 -0700112 write_seqlock(&net->ipv4.ip_local_ports.lock);
Eric W. Biederman7064d162012-05-24 10:34:21 -0600113 data[0] = low;
114 data[1] = high;
Cong Wangc9d8f1a2014-05-06 11:02:49 -0700115 write_sequnlock(&net->ipv4.ip_local_ports.lock);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000116}
117
118/* Validate changes from /proc interface. */
Joe Perchesfe2c6332013-06-11 23:04:25 -0700119static int ipv4_ping_group_range(struct ctl_table *table, int write,
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000120 void __user *buffer,
121 size_t *lenp, loff_t *ppos)
122{
Eric W. Biederman7064d162012-05-24 10:34:21 -0600123 struct user_namespace *user_ns = current_user_ns();
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000124 int ret;
Eric W. Biederman7064d162012-05-24 10:34:21 -0600125 gid_t urange[2];
126 kgid_t low, high;
Joe Perchesfe2c6332013-06-11 23:04:25 -0700127 struct ctl_table tmp = {
Eric W. Biederman7064d162012-05-24 10:34:21 -0600128 .data = &urange,
129 .maxlen = sizeof(urange),
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000130 .mode = table->mode,
131 .extra1 = &ip_ping_group_range_min,
132 .extra2 = &ip_ping_group_range_max,
133 };
134
Eric W. Biederman7064d162012-05-24 10:34:21 -0600135 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);
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000138 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
139
Eric W. Biederman7064d162012-05-24 10:34:21 -0600140 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 }
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000150
151 return ret;
152}
153
Joe Perchesfe2c6332013-06-11 23:04:25 -0700154static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700155 void __user *buffer, size_t *lenp, loff_t *ppos)
156{
157 char val[TCP_CA_NAME_MAX];
Joe Perchesfe2c6332013-06-11 23:04:25 -0700158 struct ctl_table tbl = {
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700159 .data = val,
160 .maxlen = TCP_CA_NAME_MAX,
161 };
162 int ret;
163
164 tcp_get_default_congestion_control(val);
165
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700166 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700167 if (write && ret == 0)
168 ret = tcp_set_default_congestion_control(val);
169 return ret;
170}
171
Joe Perchesfe2c6332013-06-11 23:04:25 -0700172static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700173 int write,
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800174 void __user *buffer, size_t *lenp,
175 loff_t *ppos)
176{
Joe Perchesfe2c6332013-06-11 23:04:25 -0700177 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800178 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);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700184 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800185 kfree(tbl.data);
186 return ret;
187}
188
Joe Perchesfe2c6332013-06-11 23:04:25 -0700189static int proc_allowed_congestion_control(struct ctl_table *ctl,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700190 int write,
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800191 void __user *buffer, size_t *lenp,
192 loff_t *ppos)
193{
Joe Perchesfe2c6332013-06-11 23:04:25 -0700194 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800195 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);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700202 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800203 if (write && ret == 0)
204 ret = tcp_set_allowed_congestion_control(tbl.data);
205 kfree(tbl.data);
206 return ret;
207}
208
Joe Perchesfe2c6332013-06-11 23:04:25 -0700209static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write,
210 void __user *buffer, size_t *lenp,
211 loff_t *ppos)
Jerry Chu10467162012-08-31 12:29:11 +0000212{
Joe Perchesfe2c6332013-06-11 23:04:25 -0700213 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
Jerry Chu10467162012-08-31 12:29:11 +0000214 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);
Alan Cox0e24c4f2012-10-11 06:24:14 +0000226 else
227 memset(user_key, 0, sizeof(user_key));
Jerry Chu10467162012-08-31 12:29:11 +0000228 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 }
Hannes Frederic Sowa222e83d2013-10-19 21:48:58 +0200240 /* 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);
Jerry Chu10467162012-08-31 12:29:11 +0000245 tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH);
246 }
247
248bad_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
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800256static struct ctl_table ipv4_table[] = {
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900257 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 .procname = "tcp_timestamps",
259 .data = &sysctl_tcp_timestamps,
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 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900264 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 .procname = "tcp_window_scaling",
266 .data = &sysctl_tcp_window_scaling,
267 .maxlen = sizeof(int),
268 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800269 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900271 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 .procname = "tcp_sack",
273 .data = &sysctl_tcp_sack,
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 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900278 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 .procname = "tcp_retrans_collapse",
280 .data = &sysctl_tcp_retrans_collapse,
281 .maxlen = sizeof(int),
282 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800283 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900285 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 .procname = "ip_default_ttl",
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900287 .data = &sysctl_ip_default_ttl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 .maxlen = sizeof(int),
289 .mode = 0644,
Eric Dumazet249fab72010-12-13 12:16:14 -0800290 .proc_handler = proc_dointvec_minmax,
291 .extra1 = &ip_ttl_min,
292 .extra2 = &ip_ttl_max,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900294 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 .procname = "tcp_syn_retries",
296 .data = &sysctl_tcp_syn_retries,
297 .maxlen = sizeof(int),
298 .mode = 0644,
Michal Tesar651e9272013-07-19 14:09:01 +0200299 .proc_handler = proc_dointvec_minmax,
300 .extra1 = &tcp_syn_retries_min,
301 .extra2 = &tcp_syn_retries_max
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 },
303 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 .procname = "tcp_synack_retries",
305 .data = &sysctl_tcp_synack_retries,
306 .maxlen = sizeof(int),
307 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800308 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 },
310 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 .procname = "tcp_max_orphans",
312 .data = &sysctl_tcp_max_orphans,
313 .maxlen = sizeof(int),
314 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800315 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 },
317 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 .procname = "tcp_max_tw_buckets",
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -0700319 .data = &tcp_death_row.sysctl_max_tw_buckets,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 .maxlen = sizeof(int),
321 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800322 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 },
324 {
Alexander Duyck6648bd72012-06-21 13:58:31 +0000325 .procname = "ip_early_demux",
326 .data = &sysctl_ip_early_demux,
327 .maxlen = sizeof(int),
328 .mode = 0644,
329 .proc_handler = proc_dointvec
330 },
331 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 .procname = "ip_dynaddr",
333 .data = &sysctl_ip_dynaddr,
334 .maxlen = sizeof(int),
335 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800336 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 },
338 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 .procname = "tcp_retries1",
340 .data = &sysctl_tcp_retries1,
341 .maxlen = sizeof(int),
342 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800343 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 .extra2 = &tcp_retr1_max
345 },
346 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 .procname = "tcp_retries2",
348 .data = &sysctl_tcp_retries2,
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_fin_timeout",
355 .data = &sysctl_tcp_fin_timeout,
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#ifdef CONFIG_SYN_COOKIES
361 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 .procname = "tcp_syncookies",
363 .data = &sysctl_tcp_syncookies,
364 .maxlen = sizeof(int),
365 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800366 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 },
368#endif
369 {
Yuchung Cheng2100c8d2012-07-19 06:43:05 +0000370 .procname = "tcp_fastopen",
371 .data = &sysctl_tcp_fastopen,
372 .maxlen = sizeof(int),
373 .mode = 0644,
374 .proc_handler = proc_dointvec,
375 },
376 {
Jerry Chu10467162012-08-31 12:29:11 +0000377 .procname = "tcp_fastopen_key",
378 .mode = 0600,
379 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
380 .proc_handler = proc_tcp_fastopen_key,
381 },
382 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 .procname = "tcp_tw_recycle",
Arnaldo Carvalho de Melo295ff7e2005-08-09 20:44:40 -0700384 .data = &tcp_death_row.sysctl_tw_recycle,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 .maxlen = sizeof(int),
386 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800387 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 },
389 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 .procname = "tcp_abort_on_overflow",
391 .data = &sysctl_tcp_abort_on_overflow,
392 .maxlen = sizeof(int),
393 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800394 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 },
396 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 .procname = "tcp_stdurg",
398 .data = &sysctl_tcp_stdurg,
399 .maxlen = sizeof(int),
400 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800401 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 },
403 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 .procname = "tcp_rfc1337",
405 .data = &sysctl_tcp_rfc1337,
406 .maxlen = sizeof(int),
407 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800408 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 },
410 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 .procname = "tcp_max_syn_backlog",
412 .data = &sysctl_max_syn_backlog,
413 .maxlen = sizeof(int),
414 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800415 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 },
417 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 .procname = "igmp_max_memberships",
419 .data = &sysctl_igmp_max_memberships,
420 .maxlen = sizeof(int),
421 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800422 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 .procname = "igmp_max_msf",
426 .data = &sysctl_igmp_max_msf,
427 .maxlen = sizeof(int),
428 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800429 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 },
Hannes Frederic Sowaa9fe8e22014-09-02 15:49:26 +0200431#ifdef CONFIG_IP_MULTICAST
432 {
433 .procname = "igmp_qrv",
434 .data = &sysctl_igmp_qrv,
435 .maxlen = sizeof(int),
436 .mode = 0644,
437 .proc_handler = proc_dointvec_minmax,
438 .extra1 = &one
439 },
440#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 .procname = "inet_peer_threshold",
443 .data = &inet_peer_threshold,
444 .maxlen = sizeof(int),
445 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800446 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 },
448 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 .procname = "inet_peer_minttl",
450 .data = &inet_peer_minttl,
451 .maxlen = sizeof(int),
452 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800453 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 },
455 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 .procname = "inet_peer_maxttl",
457 .data = &inet_peer_maxttl,
458 .maxlen = sizeof(int),
459 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800460 .proc_handler = proc_dointvec_jiffies,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 },
462 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 .procname = "tcp_orphan_retries",
464 .data = &sysctl_tcp_orphan_retries,
465 .maxlen = sizeof(int),
466 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800467 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 },
469 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 .procname = "tcp_fack",
471 .data = &sysctl_tcp_fack,
472 .maxlen = sizeof(int),
473 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800474 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 },
476 {
Yuchung Cheng4f41b1c2015-10-16 21:57:47 -0700477 .procname = "tcp_recovery",
478 .data = &sysctl_tcp_recovery,
479 .maxlen = sizeof(int),
480 .mode = 0644,
481 .proc_handler = proc_dointvec,
482 },
483 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 .procname = "tcp_reordering",
485 .data = &sysctl_tcp_reordering,
486 .maxlen = sizeof(int),
487 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800488 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 },
490 {
Eric Dumazetdca145f2014-10-27 21:45:24 -0700491 .procname = "tcp_max_reordering",
492 .data = &sysctl_tcp_max_reordering,
493 .maxlen = sizeof(int),
494 .mode = 0644,
495 .proc_handler = proc_dointvec
496 },
497 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 .procname = "tcp_dsack",
499 .data = &sysctl_tcp_dsack,
500 .maxlen = sizeof(int),
501 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800502 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 },
504 {
Eric W. Biedermana4fe34b2013-10-19 16:25:36 -0700505 .procname = "tcp_mem",
506 .maxlen = sizeof(sysctl_tcp_mem),
507 .data = &sysctl_tcp_mem,
508 .mode = 0644,
509 .proc_handler = proc_doulongvec_minmax,
510 },
511 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 .procname = "tcp_wmem",
513 .data = &sysctl_tcp_wmem,
514 .maxlen = sizeof(sysctl_tcp_wmem),
515 .mode = 0644,
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +0000516 .proc_handler = proc_dointvec_minmax,
Calvin Owens5d378522015-08-13 14:21:34 -0700517 .extra1 = &one,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 },
519 {
Eric Dumazetc9bee3b72013-07-22 20:27:07 -0700520 .procname = "tcp_notsent_lowat",
521 .data = &sysctl_tcp_notsent_lowat,
522 .maxlen = sizeof(sysctl_tcp_notsent_lowat),
523 .mode = 0644,
524 .proc_handler = proc_dointvec,
525 },
526 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 .procname = "tcp_rmem",
528 .data = &sysctl_tcp_rmem,
529 .maxlen = sizeof(sysctl_tcp_rmem),
530 .mode = 0644,
bingtian.ly@taobao.comcdda8892013-01-23 20:35:28 +0000531 .proc_handler = proc_dointvec_minmax,
Calvin Owens5d378522015-08-13 14:21:34 -0700532 .extra1 = &one,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 },
534 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 .procname = "tcp_app_win",
536 .data = &sysctl_tcp_app_win,
537 .maxlen = sizeof(int),
538 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800539 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 },
541 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 .procname = "tcp_adv_win_scale",
543 .data = &sysctl_tcp_adv_win_scale,
544 .maxlen = sizeof(int),
545 .mode = 0644,
Alexey Dobriyan0147fc02010-11-22 12:54:21 +0000546 .proc_handler = proc_dointvec_minmax,
547 .extra1 = &tcp_adv_win_scale_min,
548 .extra2 = &tcp_adv_win_scale_max,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 },
550 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 .procname = "tcp_tw_reuse",
552 .data = &sysctl_tcp_tw_reuse,
553 .maxlen = sizeof(int),
554 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800555 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 },
557 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 .procname = "tcp_frto",
559 .data = &sysctl_tcp_frto,
560 .maxlen = sizeof(int),
561 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800562 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 },
564 {
Yuchung Chengf6722582015-10-16 21:57:42 -0700565 .procname = "tcp_min_rtt_wlen",
566 .data = &sysctl_tcp_min_rtt_wlen,
567 .maxlen = sizeof(int),
568 .mode = 0644,
569 .proc_handler = proc_dointvec
570 },
571 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 .procname = "tcp_low_latency",
573 .data = &sysctl_tcp_low_latency,
574 .maxlen = sizeof(int),
575 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800576 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 },
578 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 .procname = "tcp_no_metrics_save",
580 .data = &sysctl_tcp_nometrics_save,
581 .maxlen = sizeof(int),
582 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800583 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 },
585 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 .procname = "tcp_moderate_rcvbuf",
587 .data = &sysctl_tcp_moderate_rcvbuf,
588 .maxlen = sizeof(int),
589 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800590 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 },
592 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 .procname = "tcp_tso_win_divisor",
594 .data = &sysctl_tcp_tso_win_divisor,
595 .maxlen = sizeof(int),
596 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800597 .proc_handler = proc_dointvec,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 },
599 {
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700600 .procname = "tcp_congestion_control",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 .mode = 0644,
Stephen Hemminger317a76f2005-06-23 12:19:55 -0700602 .maxlen = TCP_CA_NAME_MAX,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800603 .proc_handler = proc_tcp_congestion_control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 },
Stephen Hemminger9772efb2005-11-10 17:09:53 -0800605 {
Rick Jones15d99e02006-03-20 22:40:29 -0800606 .procname = "tcp_workaround_signed_windows",
607 .data = &sysctl_tcp_workaround_signed_windows,
608 .maxlen = sizeof(int),
609 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800610 .proc_handler = proc_dointvec
Rick Jones15d99e02006-03-20 22:40:29 -0800611 },
Eric Dumazet46d3cea2012-07-11 05:50:31 +0000612 {
613 .procname = "tcp_limit_output_bytes",
614 .data = &sysctl_tcp_limit_output_bytes,
615 .maxlen = sizeof(int),
616 .mode = 0644,
617 .proc_handler = proc_dointvec
618 },
Eric Dumazet282f23c2012-07-17 10:13:05 +0200619 {
620 .procname = "tcp_challenge_ack_limit",
621 .data = &sysctl_tcp_challenge_ack_limit,
622 .maxlen = sizeof(int),
623 .mode = 0644,
624 .proc_handler = proc_dointvec
625 },
David S. Miller35089bb2006-06-13 22:33:04 -0700626 {
David S. Miller35089bb2006-06-13 22:33:04 -0700627 .procname = "tcp_slow_start_after_idle",
628 .data = &sysctl_tcp_slow_start_after_idle,
629 .maxlen = sizeof(int),
630 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800631 .proc_handler = proc_dointvec
David S. Miller35089bb2006-06-13 22:33:04 -0700632 },
Paul Moore446fda42006-08-03 16:48:06 -0700633#ifdef CONFIG_NETLABEL
634 {
Paul Moore446fda42006-08-03 16:48:06 -0700635 .procname = "cipso_cache_enable",
636 .data = &cipso_v4_cache_enabled,
637 .maxlen = sizeof(int),
638 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800639 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700640 },
641 {
Paul Moore446fda42006-08-03 16:48:06 -0700642 .procname = "cipso_cache_bucket_size",
643 .data = &cipso_v4_cache_bucketsize,
644 .maxlen = sizeof(int),
645 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800646 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700647 },
648 {
Paul Moore446fda42006-08-03 16:48:06 -0700649 .procname = "cipso_rbm_optfmt",
650 .data = &cipso_v4_rbm_optfmt,
651 .maxlen = sizeof(int),
652 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800653 .proc_handler = proc_dointvec,
Paul Moore446fda42006-08-03 16:48:06 -0700654 },
655 {
Paul Moore446fda42006-08-03 16:48:06 -0700656 .procname = "cipso_rbm_strictvalid",
657 .data = &cipso_v4_rbm_strictvalid,
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#endif /* CONFIG_NETLABEL */
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800663 {
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800664 .procname = "tcp_available_congestion_control",
665 .maxlen = TCP_CA_BUF_MAX,
666 .mode = 0444,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800667 .proc_handler = proc_tcp_available_congestion_control,
Stephen Hemminger3ff825b2006-11-09 16:32:06 -0800668 },
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800669 {
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800670 .procname = "tcp_allowed_congestion_control",
671 .maxlen = TCP_CA_BUF_MAX,
672 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800673 .proc_handler = proc_allowed_congestion_control,
Stephen Hemmingerce7bc3b2006-11-09 16:35:15 -0800674 },
John Heffner886236c2007-03-25 19:21:45 -0700675 {
Andreas Petlund36e31b0a2010-02-18 02:47:01 +0000676 .procname = "tcp_thin_linear_timeouts",
677 .data = &sysctl_tcp_thin_linear_timeouts,
678 .maxlen = sizeof(int),
679 .mode = 0644,
680 .proc_handler = proc_dointvec
681 },
Weilong Chen5797deb2013-12-23 14:37:31 +0800682 {
Andreas Petlund7e380172010-02-18 04:48:19 +0000683 .procname = "tcp_thin_dupack",
684 .data = &sysctl_tcp_thin_dupack,
685 .maxlen = sizeof(int),
686 .mode = 0644,
687 .proc_handler = proc_dointvec
688 },
Andreas Petlund36e31b0a2010-02-18 02:47:01 +0000689 {
Yuchung Chengeed530b2012-05-02 13:30:03 +0000690 .procname = "tcp_early_retrans",
691 .data = &sysctl_tcp_early_retrans,
692 .maxlen = sizeof(int),
693 .mode = 0644,
694 .proc_handler = proc_dointvec_minmax,
695 .extra1 = &zero,
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +0000696 .extra2 = &four,
Yuchung Chengeed530b2012-05-02 13:30:03 +0000697 },
698 {
Eric Dumazet95bd09e2013-08-27 05:46:32 -0700699 .procname = "tcp_min_tso_segs",
700 .data = &sysctl_tcp_min_tso_segs,
701 .maxlen = sizeof(int),
702 .mode = 0644,
703 .proc_handler = proc_dointvec_minmax,
Eric Dumazetd6a4e262015-05-26 08:55:28 -0700704 .extra1 = &one,
Eric Dumazet95bd09e2013-08-27 05:46:32 -0700705 .extra2 = &gso_max_segs,
706 },
707 {
Eric Dumazet43e122b2015-08-21 17:38:02 -0700708 .procname = "tcp_pacing_ss_ratio",
709 .data = &sysctl_tcp_pacing_ss_ratio,
710 .maxlen = sizeof(int),
711 .mode = 0644,
712 .proc_handler = proc_dointvec_minmax,
713 .extra1 = &zero,
714 .extra2 = &thousand,
715 },
716 {
717 .procname = "tcp_pacing_ca_ratio",
718 .data = &sysctl_tcp_pacing_ca_ratio,
719 .maxlen = sizeof(int),
720 .mode = 0644,
721 .proc_handler = proc_dointvec_minmax,
722 .extra1 = &zero,
723 .extra2 = &thousand,
724 },
725 {
Eric Dumazetf54b3112013-12-05 22:36:05 -0800726 .procname = "tcp_autocorking",
727 .data = &sysctl_tcp_autocorking,
728 .maxlen = sizeof(int),
729 .mode = 0644,
730 .proc_handler = proc_dointvec_minmax,
731 .extra1 = &zero,
732 .extra2 = &one,
733 },
734 {
Neal Cardwell032ee422015-02-06 16:04:38 -0500735 .procname = "tcp_invalid_ratelimit",
736 .data = &sysctl_tcp_invalid_ratelimit,
737 .maxlen = sizeof(int),
738 .mode = 0644,
739 .proc_handler = proc_dointvec_ms_jiffies,
740 },
741 {
Eric Dumazet4cdf5072014-09-19 07:38:40 -0700742 .procname = "icmp_msgs_per_sec",
743 .data = &sysctl_icmp_msgs_per_sec,
744 .maxlen = sizeof(int),
745 .mode = 0644,
746 .proc_handler = proc_dointvec_minmax,
747 .extra1 = &zero,
748 },
749 {
750 .procname = "icmp_msgs_burst",
751 .data = &sysctl_icmp_msgs_burst,
752 .maxlen = sizeof(int),
753 .mode = 0644,
754 .proc_handler = proc_dointvec_minmax,
755 .extra1 = &zero,
756 },
757 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800758 .procname = "udp_mem",
759 .data = &sysctl_udp_mem,
760 .maxlen = sizeof(sysctl_udp_mem),
761 .mode = 0644,
Eric Dumazet8d987e52010-11-09 23:24:26 +0000762 .proc_handler = proc_doulongvec_minmax,
Hideo Aoki95766ff2007-12-31 00:29:24 -0800763 },
764 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800765 .procname = "udp_rmem_min",
766 .data = &sysctl_udp_rmem_min,
767 .maxlen = sizeof(sysctl_udp_rmem_min),
768 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800769 .proc_handler = proc_dointvec_minmax,
Calvin Owens5d378522015-08-13 14:21:34 -0700770 .extra1 = &one
Hideo Aoki95766ff2007-12-31 00:29:24 -0800771 },
772 {
Hideo Aoki95766ff2007-12-31 00:29:24 -0800773 .procname = "udp_wmem_min",
774 .data = &sysctl_udp_wmem_min,
775 .maxlen = sizeof(sysctl_udp_wmem_min),
776 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800777 .proc_handler = proc_dointvec_minmax,
Calvin Owens5d378522015-08-13 14:21:34 -0700778 .extra1 = &one
Hideo Aoki95766ff2007-12-31 00:29:24 -0800779 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800780 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781};
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -0800782
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700783static struct ctl_table ipv4_net_table[] = {
784 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700785 .procname = "icmp_echo_ignore_all",
786 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
787 .maxlen = sizeof(int),
788 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800789 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700790 },
791 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700792 .procname = "icmp_echo_ignore_broadcasts",
793 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
794 .maxlen = sizeof(int),
795 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800796 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700797 },
798 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700799 .procname = "icmp_ignore_bogus_error_responses",
800 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
801 .maxlen = sizeof(int),
802 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800803 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700804 },
805 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700806 .procname = "icmp_errors_use_inbound_ifaddr",
807 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
808 .maxlen = sizeof(int),
809 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800810 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700811 },
812 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700813 .procname = "icmp_ratelimit",
814 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
815 .maxlen = sizeof(int),
816 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800817 .proc_handler = proc_dointvec_ms_jiffies,
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700818 },
819 {
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700820 .procname = "icmp_ratemask",
821 .data = &init_net.ipv4.sysctl_icmp_ratemask,
822 .maxlen = sizeof(int),
823 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -0800824 .proc_handler = proc_dointvec
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700825 },
Neil Horman1080d702008-10-27 12:28:25 -0700826 {
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000827 .procname = "ping_group_range",
Cong Wangba6b9182014-05-06 11:02:50 -0700828 .data = &init_net.ipv4.ping_group_range.range,
Eric W. Biederman7064d162012-05-24 10:34:21 -0600829 .maxlen = sizeof(gid_t)*2,
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000830 .mode = 0644,
831 .proc_handler = ipv4_ping_group_range,
832 },
Glauber Costa3dc43e32011-12-11 21:47:05 +0000833 {
Hannes Frederic Sowa5d134f12013-01-05 16:10:48 +0000834 .procname = "tcp_ecn",
835 .data = &init_net.ipv4.sysctl_tcp_ecn,
836 .maxlen = sizeof(int),
837 .mode = 0644,
838 .proc_handler = proc_dointvec
839 },
840 {
Daniel Borkmann49213552015-05-19 21:04:22 +0200841 .procname = "tcp_ecn_fallback",
842 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
843 .maxlen = sizeof(int),
844 .mode = 0644,
845 .proc_handler = proc_dointvec
846 },
847 {
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700848 .procname = "ip_local_port_range",
Cong Wangc9d8f1a2014-05-06 11:02:49 -0700849 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
850 .data = &init_net.ipv4.ip_local_ports.range,
Eric W. Biederman0bbf87d2013-09-28 14:10:59 -0700851 .mode = 0644,
852 .proc_handler = ipv4_local_port_range,
853 },
Hannes Frederic Sowa974eda12013-12-14 05:13:38 +0100854 {
WANG Cong122ff242014-05-12 16:04:53 -0700855 .procname = "ip_local_reserved_ports",
856 .data = &init_net.ipv4.sysctl_local_reserved_ports,
857 .maxlen = 65536,
858 .mode = 0644,
859 .proc_handler = proc_do_large_bitmap,
860 },
861 {
Hannes Frederic Sowa974eda12013-12-14 05:13:38 +0100862 .procname = "ip_no_pmtu_disc",
863 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
864 .maxlen = sizeof(int),
865 .mode = 0644,
866 .proc_handler = proc_dointvec
867 },
Hannes Frederic Sowaf87c10a2014-01-09 10:01:15 +0100868 {
869 .procname = "ip_forward_use_pmtu",
870 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
871 .maxlen = sizeof(int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec,
874 },
Lorenzo Colittie1108612014-05-13 10:17:33 -0700875 {
Vincent Bernat49a60152014-09-05 15:09:03 +0200876 .procname = "ip_nonlocal_bind",
877 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
878 .maxlen = sizeof(int),
879 .mode = 0644,
880 .proc_handler = proc_dointvec
881 },
882 {
Lorenzo Colittie1108612014-05-13 10:17:33 -0700883 .procname = "fwmark_reflect",
884 .data = &init_net.ipv4.sysctl_fwmark_reflect,
885 .maxlen = sizeof(int),
886 .mode = 0644,
887 .proc_handler = proc_dointvec,
888 },
Lorenzo Colitti84f39b02014-05-13 10:17:35 -0700889 {
890 .procname = "tcp_fwmark_accept",
891 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
892 .maxlen = sizeof(int),
893 .mode = 0644,
894 .proc_handler = proc_dointvec,
895 },
David Ahern6dd9a142015-12-16 13:20:44 -0800896#ifdef CONFIG_NET_L3_MASTER_DEV
897 {
898 .procname = "tcp_l3mdev_accept",
899 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
900 .maxlen = sizeof(int),
901 .mode = 0644,
902 .proc_handler = proc_dointvec_minmax,
903 .extra1 = &zero,
904 .extra2 = &one,
905 },
906#endif
Fan Dub0f9ca52015-02-10 09:53:16 +0800907 {
908 .procname = "tcp_mtu_probing",
909 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
910 .maxlen = sizeof(int),
911 .mode = 0644,
912 .proc_handler = proc_dointvec,
913 },
914 {
915 .procname = "tcp_base_mss",
916 .data = &init_net.ipv4.sysctl_tcp_base_mss,
917 .maxlen = sizeof(int),
918 .mode = 0644,
919 .proc_handler = proc_dointvec,
920 },
Fan Du6b58e0a2015-03-06 11:18:23 +0800921 {
922 .procname = "tcp_probe_threshold",
923 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
924 .maxlen = sizeof(int),
925 .mode = 0644,
926 .proc_handler = proc_dointvec,
927 },
Fan Du05cbc0d2015-03-06 11:18:24 +0800928 {
929 .procname = "tcp_probe_interval",
930 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
931 .maxlen = sizeof(int),
932 .mode = 0644,
933 .proc_handler = proc_dointvec,
934 },
Philip Downeydf2cf4a2015-08-27 16:46:26 +0100935 {
936 .procname = "igmp_link_local_mcast_reports",
937 .data = &sysctl_igmp_llm_reports,
938 .maxlen = sizeof(int),
939 .mode = 0644,
940 .proc_handler = proc_dointvec
941 },
Nikolay Borisov13b287e2016-01-07 16:38:43 +0200942 {
943 .procname = "tcp_keepalive_time",
944 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
945 .maxlen = sizeof(int),
946 .mode = 0644,
947 .proc_handler = proc_dointvec_jiffies,
948 },
Nikolay Borisov9bd68612016-01-07 16:38:44 +0200949 {
950 .procname = "tcp_keepalive_probes",
951 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
952 .maxlen = sizeof(int),
953 .mode = 0644,
954 .proc_handler = proc_dointvec
955 },
Nikolay Borisovb840d152016-01-07 16:38:45 +0200956 {
957 .procname = "tcp_keepalive_intvl",
958 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
959 .maxlen = sizeof(int),
960 .mode = 0644,
961 .proc_handler = proc_dointvec_jiffies,
962 },
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700963 { }
964};
965
Pavel Emelyanov15775192008-03-26 01:54:18 -0700966static __net_init int ipv4_sysctl_init_net(struct net *net)
967{
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700968 struct ctl_table *table;
969
970 table = ipv4_net_table;
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800971 if (!net_eq(net, &init_net)) {
Eric W. Biederman0a6fa232013-10-19 16:27:03 -0700972 int i;
973
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700974 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
Ian Morris51456b22015-04-03 09:17:26 +0100975 if (!table)
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700976 goto err_alloc;
977
Eric W. Biederman0a6fa232013-10-19 16:27:03 -0700978 /* Update the variables to point into the current struct net */
979 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
980 table[i].data += (void *)net - (void *)&init_net;
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700981 }
982
Eric W. Biedermanec8f23c2012-04-19 13:44:49 +0000983 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
Ian Morris51456b22015-04-03 09:17:26 +0100984 if (!net->ipv4.ipv4_hdr)
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700985 goto err_reg;
986
WANG Cong122ff242014-05-12 16:04:53 -0700987 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
988 if (!net->ipv4.sysctl_local_reserved_ports)
989 goto err_ports;
990
Pavel Emelyanov15775192008-03-26 01:54:18 -0700991 return 0;
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700992
WANG Cong122ff242014-05-12 16:04:53 -0700993err_ports:
994 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700995err_reg:
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800996 if (!net_eq(net, &init_net))
Pavel Emelyanov68528f02008-03-26 01:56:24 -0700997 kfree(table);
998err_alloc:
999 return -ENOMEM;
Pavel Emelyanov15775192008-03-26 01:54:18 -07001000}
1001
1002static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1003{
Pavel Emelyanov68528f02008-03-26 01:56:24 -07001004 struct ctl_table *table;
1005
WANG Cong122ff242014-05-12 16:04:53 -07001006 kfree(net->ipv4.sysctl_local_reserved_ports);
Pavel Emelyanov68528f02008-03-26 01:56:24 -07001007 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1008 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1009 kfree(table);
Pavel Emelyanov15775192008-03-26 01:54:18 -07001010}
1011
1012static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1013 .init = ipv4_sysctl_init_net,
1014 .exit = ipv4_sysctl_exit_net,
1015};
1016
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -08001017static __init int sysctl_ipv4_init(void)
1018{
1019 struct ctl_table_header *hdr;
1020
Eric W. Biedermanec8f23c2012-04-19 13:44:49 +00001021 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
Ian Morris51456b22015-04-03 09:17:26 +01001022 if (!hdr)
Pavel Emelyanov15775192008-03-26 01:54:18 -07001023 return -ENOMEM;
1024
1025 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
Eric W. Biederman5dd3df12012-04-19 13:24:33 +00001026 unregister_net_sysctl_table(hdr);
Pavel Emelyanov15775192008-03-26 01:54:18 -07001027 return -ENOMEM;
1028 }
1029
1030 return 0;
Pavel Emelyanov3e37c3f2007-12-05 01:41:26 -08001031}
1032
1033__initcall(sysctl_ipv4_init);