Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem. | |
3 | * | |
1da177e4 LT |
4 | * Begun April 1, 1996, Mike Shaver. |
5 | * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS] | |
6 | */ | |
7 | ||
8 | #include <linux/mm.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/sysctl.h> | |
20380731 | 11 | #include <linux/igmp.h> |
14c85021 | 12 | #include <linux/inetdevice.h> |
227b60f5 | 13 | #include <linux/seqlock.h> |
3e37c3f9 | 14 | #include <linux/init.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
c319b4d7 | 16 | #include <linux/nsproxy.h> |
3dc43e3e | 17 | #include <linux/swap.h> |
1da177e4 | 18 | #include <net/snmp.h> |
20380731 | 19 | #include <net/icmp.h> |
1da177e4 LT |
20 | #include <net/ip.h> |
21 | #include <net/route.h> | |
22 | #include <net/tcp.h> | |
95766fff | 23 | #include <net/udp.h> |
446fda4f | 24 | #include <net/cipso_ipv4.h> |
04128f23 | 25 | #include <net/inet_frag.h> |
c319b4d7 | 26 | #include <net/ping.h> |
3aaabe23 | 27 | #include <net/tcp_memcontrol.h> |
1da177e4 | 28 | |
89cee8b1 | 29 | static int zero; |
cdda8891 | 30 | static int one = 1; |
6ba8a3b1 | 31 | static int four = 4; |
95bd09eb | 32 | static int gso_max_segs = GSO_MAX_SEGS; |
e905a9ed | 33 | static int tcp_retr1_max = 255; |
1da177e4 LT |
34 | static int ip_local_port_range_min[] = { 1, 1 }; |
35 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
36 | static int tcp_adv_win_scale_min = -31; |
37 | static int tcp_adv_win_scale_max = 31; | |
249fab77 ED |
38 | static int ip_ttl_min = 1; |
39 | static int ip_ttl_max = 255; | |
651e9271 MT |
40 | static int tcp_syn_retries_min = 1; |
41 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; | |
c319b4d7 VK |
42 | static int ip_ping_group_range_min[] = { 0, 0 }; |
43 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 44 | |
227b60f5 | 45 | /* Update system visible IP port range */ |
0bbf87d8 | 46 | static void set_local_port_range(struct net *net, int range[2]) |
227b60f5 | 47 | { |
c9d8f1a6 CW |
48 | write_seqlock(&net->ipv4.ip_local_ports.lock); |
49 | net->ipv4.ip_local_ports.range[0] = range[0]; | |
50 | net->ipv4.ip_local_ports.range[1] = range[1]; | |
51 | write_sequnlock(&net->ipv4.ip_local_ports.lock); | |
227b60f5 SH |
52 | } |
53 | ||
54 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 55 | static int ipv4_local_port_range(struct ctl_table *table, int write, |
227b60f5 SH |
56 | void __user *buffer, |
57 | size_t *lenp, loff_t *ppos) | |
58 | { | |
0bbf87d8 | 59 | struct net *net = |
c9d8f1a6 | 60 | container_of(table->data, struct net, ipv4.ip_local_ports.range); |
227b60f5 | 61 | int ret; |
3c689b73 | 62 | int range[2]; |
fe2c6338 | 63 | struct ctl_table tmp = { |
227b60f5 SH |
64 | .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 | ||
0bbf87d8 EB |
71 | inet_get_local_port_range(net, &range[0], &range[1]); |
72 | ||
8d65af78 | 73 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
74 | |
75 | if (write && ret == 0) { | |
a25de534 | 76 | if (range[1] < range[0]) |
227b60f5 SH |
77 | ret = -EINVAL; |
78 | else | |
0bbf87d8 | 79 | set_local_port_range(net, range); |
227b60f5 SH |
80 | } |
81 | ||
82 | return ret; | |
83 | } | |
84 | ||
c319b4d7 | 85 | |
7064d16e | 86 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
c319b4d7 | 87 | { |
7064d16e | 88 | kgid_t *data = table->data; |
0bbf87d8 | 89 | struct net *net = |
ba6b918a | 90 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
95c96174 | 91 | unsigned int seq; |
c319b4d7 | 92 | do { |
c9d8f1a6 | 93 | seq = read_seqbegin(&net->ipv4.ip_local_ports.lock); |
c319b4d7 VK |
94 | |
95 | *low = data[0]; | |
96 | *high = data[1]; | |
c9d8f1a6 | 97 | } while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq)); |
c319b4d7 VK |
98 | } |
99 | ||
100 | /* Update system visible IP port range */ | |
7064d16e | 101 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
c319b4d7 | 102 | { |
7064d16e | 103 | kgid_t *data = table->data; |
0bbf87d8 | 104 | struct net *net = |
ba6b918a | 105 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
c9d8f1a6 | 106 | write_seqlock(&net->ipv4.ip_local_ports.lock); |
7064d16e EB |
107 | data[0] = low; |
108 | data[1] = high; | |
c9d8f1a6 | 109 | write_sequnlock(&net->ipv4.ip_local_ports.lock); |
c319b4d7 VK |
110 | } |
111 | ||
112 | /* Validate changes from /proc interface. */ | |
fe2c6338 | 113 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
c319b4d7 VK |
114 | void __user *buffer, |
115 | size_t *lenp, loff_t *ppos) | |
116 | { | |
7064d16e | 117 | struct user_namespace *user_ns = current_user_ns(); |
c319b4d7 | 118 | int ret; |
7064d16e EB |
119 | gid_t urange[2]; |
120 | kgid_t low, high; | |
fe2c6338 | 121 | struct ctl_table tmp = { |
7064d16e EB |
122 | .data = &urange, |
123 | .maxlen = sizeof(urange), | |
c319b4d7 VK |
124 | .mode = table->mode, |
125 | .extra1 = &ip_ping_group_range_min, | |
126 | .extra2 = &ip_ping_group_range_max, | |
127 | }; | |
128 | ||
7064d16e EB |
129 | 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); | |
c319b4d7 VK |
132 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
133 | ||
7064d16e EB |
134 | 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 | } | |
c319b4d7 VK |
144 | |
145 | return ret; | |
146 | } | |
147 | ||
fe2c6338 | 148 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
317a76f9 SH |
149 | void __user *buffer, size_t *lenp, loff_t *ppos) |
150 | { | |
151 | char val[TCP_CA_NAME_MAX]; | |
fe2c6338 | 152 | struct ctl_table tbl = { |
317a76f9 SH |
153 | .data = val, |
154 | .maxlen = TCP_CA_NAME_MAX, | |
155 | }; | |
156 | int ret; | |
157 | ||
158 | tcp_get_default_congestion_control(val); | |
159 | ||
8d65af78 | 160 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
161 | if (write && ret == 0) |
162 | ret = tcp_set_default_congestion_control(val); | |
163 | return ret; | |
164 | } | |
165 | ||
fe2c6338 | 166 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
8d65af78 | 167 | int write, |
3ff825b2 SH |
168 | void __user *buffer, size_t *lenp, |
169 | loff_t *ppos) | |
170 | { | |
fe2c6338 | 171 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
3ff825b2 SH |
172 | 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); | |
8d65af78 | 178 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
179 | kfree(tbl.data); |
180 | return ret; | |
181 | } | |
182 | ||
fe2c6338 | 183 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
8d65af78 | 184 | int write, |
ce7bc3bf SH |
185 | void __user *buffer, size_t *lenp, |
186 | loff_t *ppos) | |
187 | { | |
fe2c6338 | 188 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
ce7bc3bf SH |
189 | 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); | |
8d65af78 | 196 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
197 | if (write && ret == 0) |
198 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
199 | kfree(tbl.data); | |
200 | return ret; | |
201 | } | |
202 | ||
fe2c6338 JP |
203 | static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write, |
204 | void __user *buffer, size_t *lenp, | |
205 | loff_t *ppos) | |
10467163 | 206 | { |
fe2c6338 | 207 | struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
10467163 JC |
208 | 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); | |
0e24c4fc AC |
220 | else |
221 | memset(user_key, 0, sizeof(user_key)); | |
10467163 JC |
222 | 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 | } | |
222e83d2 HFS |
234 | /* 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); | |
10467163 JC |
239 | tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH); |
240 | } | |
241 | ||
242 | bad_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 | ||
3e37c3f9 | 250 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 251 | { |
1da177e4 LT |
252 | .procname = "tcp_timestamps", |
253 | .data = &sysctl_tcp_timestamps, | |
254 | .maxlen = sizeof(int), | |
255 | .mode = 0644, | |
6d9f239a | 256 | .proc_handler = proc_dointvec |
1da177e4 | 257 | }, |
e905a9ed | 258 | { |
1da177e4 LT |
259 | .procname = "tcp_window_scaling", |
260 | .data = &sysctl_tcp_window_scaling, | |
261 | .maxlen = sizeof(int), | |
262 | .mode = 0644, | |
6d9f239a | 263 | .proc_handler = proc_dointvec |
1da177e4 | 264 | }, |
e905a9ed | 265 | { |
1da177e4 LT |
266 | .procname = "tcp_sack", |
267 | .data = &sysctl_tcp_sack, | |
268 | .maxlen = sizeof(int), | |
269 | .mode = 0644, | |
6d9f239a | 270 | .proc_handler = proc_dointvec |
1da177e4 | 271 | }, |
e905a9ed | 272 | { |
1da177e4 LT |
273 | .procname = "tcp_retrans_collapse", |
274 | .data = &sysctl_tcp_retrans_collapse, | |
275 | .maxlen = sizeof(int), | |
276 | .mode = 0644, | |
6d9f239a | 277 | .proc_handler = proc_dointvec |
1da177e4 | 278 | }, |
e905a9ed | 279 | { |
1da177e4 | 280 | .procname = "ip_default_ttl", |
e905a9ed | 281 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
282 | .maxlen = sizeof(int), |
283 | .mode = 0644, | |
249fab77 ED |
284 | .proc_handler = proc_dointvec_minmax, |
285 | .extra1 = &ip_ttl_min, | |
286 | .extra2 = &ip_ttl_max, | |
1da177e4 | 287 | }, |
1da177e4 | 288 | { |
1da177e4 LT |
289 | .procname = "tcp_syn_retries", |
290 | .data = &sysctl_tcp_syn_retries, | |
291 | .maxlen = sizeof(int), | |
292 | .mode = 0644, | |
651e9271 MT |
293 | .proc_handler = proc_dointvec_minmax, |
294 | .extra1 = &tcp_syn_retries_min, | |
295 | .extra2 = &tcp_syn_retries_max | |
1da177e4 LT |
296 | }, |
297 | { | |
1da177e4 LT |
298 | .procname = "tcp_synack_retries", |
299 | .data = &sysctl_tcp_synack_retries, | |
300 | .maxlen = sizeof(int), | |
301 | .mode = 0644, | |
6d9f239a | 302 | .proc_handler = proc_dointvec |
1da177e4 LT |
303 | }, |
304 | { | |
1da177e4 LT |
305 | .procname = "tcp_max_orphans", |
306 | .data = &sysctl_tcp_max_orphans, | |
307 | .maxlen = sizeof(int), | |
308 | .mode = 0644, | |
6d9f239a | 309 | .proc_handler = proc_dointvec |
1da177e4 LT |
310 | }, |
311 | { | |
1da177e4 | 312 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 313 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
314 | .maxlen = sizeof(int), |
315 | .mode = 0644, | |
6d9f239a | 316 | .proc_handler = proc_dointvec |
1da177e4 | 317 | }, |
6648bd7e AD |
318 | { |
319 | .procname = "ip_early_demux", | |
320 | .data = &sysctl_ip_early_demux, | |
321 | .maxlen = sizeof(int), | |
322 | .mode = 0644, | |
323 | .proc_handler = proc_dointvec | |
324 | }, | |
1da177e4 | 325 | { |
1da177e4 LT |
326 | .procname = "ip_dynaddr", |
327 | .data = &sysctl_ip_dynaddr, | |
328 | .maxlen = sizeof(int), | |
329 | .mode = 0644, | |
6d9f239a | 330 | .proc_handler = proc_dointvec |
1da177e4 | 331 | }, |
1da177e4 | 332 | { |
1da177e4 LT |
333 | .procname = "tcp_keepalive_time", |
334 | .data = &sysctl_tcp_keepalive_time, | |
335 | .maxlen = sizeof(int), | |
336 | .mode = 0644, | |
6d9f239a | 337 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
338 | }, |
339 | { | |
1da177e4 LT |
340 | .procname = "tcp_keepalive_probes", |
341 | .data = &sysctl_tcp_keepalive_probes, | |
342 | .maxlen = sizeof(int), | |
343 | .mode = 0644, | |
6d9f239a | 344 | .proc_handler = proc_dointvec |
1da177e4 LT |
345 | }, |
346 | { | |
1da177e4 LT |
347 | .procname = "tcp_keepalive_intvl", |
348 | .data = &sysctl_tcp_keepalive_intvl, | |
349 | .maxlen = sizeof(int), | |
350 | .mode = 0644, | |
6d9f239a | 351 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
352 | }, |
353 | { | |
1da177e4 LT |
354 | .procname = "tcp_retries1", |
355 | .data = &sysctl_tcp_retries1, | |
356 | .maxlen = sizeof(int), | |
357 | .mode = 0644, | |
6d9f239a | 358 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
359 | .extra2 = &tcp_retr1_max |
360 | }, | |
361 | { | |
1da177e4 LT |
362 | .procname = "tcp_retries2", |
363 | .data = &sysctl_tcp_retries2, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
6d9f239a | 366 | .proc_handler = proc_dointvec |
1da177e4 LT |
367 | }, |
368 | { | |
1da177e4 LT |
369 | .procname = "tcp_fin_timeout", |
370 | .data = &sysctl_tcp_fin_timeout, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
6d9f239a | 373 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
374 | }, |
375 | #ifdef CONFIG_SYN_COOKIES | |
376 | { | |
1da177e4 LT |
377 | .procname = "tcp_syncookies", |
378 | .data = &sysctl_tcp_syncookies, | |
379 | .maxlen = sizeof(int), | |
380 | .mode = 0644, | |
6d9f239a | 381 | .proc_handler = proc_dointvec |
1da177e4 LT |
382 | }, |
383 | #endif | |
2100c8d2 YC |
384 | { |
385 | .procname = "tcp_fastopen", | |
386 | .data = &sysctl_tcp_fastopen, | |
387 | .maxlen = sizeof(int), | |
388 | .mode = 0644, | |
389 | .proc_handler = proc_dointvec, | |
390 | }, | |
10467163 JC |
391 | { |
392 | .procname = "tcp_fastopen_key", | |
393 | .mode = 0600, | |
394 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10), | |
395 | .proc_handler = proc_tcp_fastopen_key, | |
396 | }, | |
1da177e4 | 397 | { |
1da177e4 | 398 | .procname = "tcp_tw_recycle", |
295ff7ed | 399 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
400 | .maxlen = sizeof(int), |
401 | .mode = 0644, | |
6d9f239a | 402 | .proc_handler = proc_dointvec |
1da177e4 LT |
403 | }, |
404 | { | |
1da177e4 LT |
405 | .procname = "tcp_abort_on_overflow", |
406 | .data = &sysctl_tcp_abort_on_overflow, | |
407 | .maxlen = sizeof(int), | |
408 | .mode = 0644, | |
6d9f239a | 409 | .proc_handler = proc_dointvec |
1da177e4 LT |
410 | }, |
411 | { | |
1da177e4 LT |
412 | .procname = "tcp_stdurg", |
413 | .data = &sysctl_tcp_stdurg, | |
414 | .maxlen = sizeof(int), | |
415 | .mode = 0644, | |
6d9f239a | 416 | .proc_handler = proc_dointvec |
1da177e4 LT |
417 | }, |
418 | { | |
1da177e4 LT |
419 | .procname = "tcp_rfc1337", |
420 | .data = &sysctl_tcp_rfc1337, | |
421 | .maxlen = sizeof(int), | |
422 | .mode = 0644, | |
6d9f239a | 423 | .proc_handler = proc_dointvec |
1da177e4 LT |
424 | }, |
425 | { | |
1da177e4 LT |
426 | .procname = "tcp_max_syn_backlog", |
427 | .data = &sysctl_max_syn_backlog, | |
428 | .maxlen = sizeof(int), | |
429 | .mode = 0644, | |
6d9f239a | 430 | .proc_handler = proc_dointvec |
1da177e4 | 431 | }, |
1da177e4 | 432 | { |
1da177e4 LT |
433 | .procname = "igmp_max_memberships", |
434 | .data = &sysctl_igmp_max_memberships, | |
435 | .maxlen = sizeof(int), | |
436 | .mode = 0644, | |
6d9f239a | 437 | .proc_handler = proc_dointvec |
1da177e4 | 438 | }, |
1da177e4 | 439 | { |
1da177e4 LT |
440 | .procname = "igmp_max_msf", |
441 | .data = &sysctl_igmp_max_msf, | |
442 | .maxlen = sizeof(int), | |
443 | .mode = 0644, | |
6d9f239a | 444 | .proc_handler = proc_dointvec |
1da177e4 | 445 | }, |
a9fe8e29 HFS |
446 | #ifdef CONFIG_IP_MULTICAST |
447 | { | |
448 | .procname = "igmp_qrv", | |
449 | .data = &sysctl_igmp_qrv, | |
450 | .maxlen = sizeof(int), | |
451 | .mode = 0644, | |
452 | .proc_handler = proc_dointvec_minmax, | |
453 | .extra1 = &one | |
454 | }, | |
455 | #endif | |
1da177e4 | 456 | { |
1da177e4 LT |
457 | .procname = "inet_peer_threshold", |
458 | .data = &inet_peer_threshold, | |
459 | .maxlen = sizeof(int), | |
460 | .mode = 0644, | |
6d9f239a | 461 | .proc_handler = proc_dointvec |
1da177e4 LT |
462 | }, |
463 | { | |
1da177e4 LT |
464 | .procname = "inet_peer_minttl", |
465 | .data = &inet_peer_minttl, | |
466 | .maxlen = sizeof(int), | |
467 | .mode = 0644, | |
6d9f239a | 468 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
469 | }, |
470 | { | |
1da177e4 LT |
471 | .procname = "inet_peer_maxttl", |
472 | .data = &inet_peer_maxttl, | |
473 | .maxlen = sizeof(int), | |
474 | .mode = 0644, | |
6d9f239a | 475 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 476 | }, |
1da177e4 | 477 | { |
1da177e4 LT |
478 | .procname = "tcp_orphan_retries", |
479 | .data = &sysctl_tcp_orphan_retries, | |
480 | .maxlen = sizeof(int), | |
481 | .mode = 0644, | |
6d9f239a | 482 | .proc_handler = proc_dointvec |
1da177e4 LT |
483 | }, |
484 | { | |
1da177e4 LT |
485 | .procname = "tcp_fack", |
486 | .data = &sysctl_tcp_fack, | |
487 | .maxlen = sizeof(int), | |
488 | .mode = 0644, | |
6d9f239a | 489 | .proc_handler = proc_dointvec |
1da177e4 LT |
490 | }, |
491 | { | |
1da177e4 LT |
492 | .procname = "tcp_reordering", |
493 | .data = &sysctl_tcp_reordering, | |
494 | .maxlen = sizeof(int), | |
495 | .mode = 0644, | |
6d9f239a | 496 | .proc_handler = proc_dointvec |
1da177e4 | 497 | }, |
1da177e4 | 498 | { |
1da177e4 LT |
499 | .procname = "tcp_dsack", |
500 | .data = &sysctl_tcp_dsack, | |
501 | .maxlen = sizeof(int), | |
502 | .mode = 0644, | |
6d9f239a | 503 | .proc_handler = proc_dointvec |
1da177e4 | 504 | }, |
a4fe34bf EB |
505 | { |
506 | .procname = "tcp_mem", | |
507 | .maxlen = sizeof(sysctl_tcp_mem), | |
508 | .data = &sysctl_tcp_mem, | |
509 | .mode = 0644, | |
510 | .proc_handler = proc_doulongvec_minmax, | |
511 | }, | |
1da177e4 | 512 | { |
1da177e4 LT |
513 | .procname = "tcp_wmem", |
514 | .data = &sysctl_tcp_wmem, | |
515 | .maxlen = sizeof(sysctl_tcp_wmem), | |
516 | .mode = 0644, | |
cdda8891 | 517 | .proc_handler = proc_dointvec_minmax, |
518 | .extra1 = &one, | |
1da177e4 | 519 | }, |
c9bee3b7 ED |
520 | { |
521 | .procname = "tcp_notsent_lowat", | |
522 | .data = &sysctl_tcp_notsent_lowat, | |
523 | .maxlen = sizeof(sysctl_tcp_notsent_lowat), | |
524 | .mode = 0644, | |
525 | .proc_handler = proc_dointvec, | |
526 | }, | |
1da177e4 | 527 | { |
1da177e4 LT |
528 | .procname = "tcp_rmem", |
529 | .data = &sysctl_tcp_rmem, | |
530 | .maxlen = sizeof(sysctl_tcp_rmem), | |
531 | .mode = 0644, | |
cdda8891 | 532 | .proc_handler = proc_dointvec_minmax, |
533 | .extra1 = &one, | |
1da177e4 LT |
534 | }, |
535 | { | |
1da177e4 LT |
536 | .procname = "tcp_app_win", |
537 | .data = &sysctl_tcp_app_win, | |
538 | .maxlen = sizeof(int), | |
539 | .mode = 0644, | |
6d9f239a | 540 | .proc_handler = proc_dointvec |
1da177e4 LT |
541 | }, |
542 | { | |
1da177e4 LT |
543 | .procname = "tcp_adv_win_scale", |
544 | .data = &sysctl_tcp_adv_win_scale, | |
545 | .maxlen = sizeof(int), | |
546 | .mode = 0644, | |
0147fc05 AD |
547 | .proc_handler = proc_dointvec_minmax, |
548 | .extra1 = &tcp_adv_win_scale_min, | |
549 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 550 | }, |
1da177e4 | 551 | { |
1da177e4 LT |
552 | .procname = "tcp_tw_reuse", |
553 | .data = &sysctl_tcp_tw_reuse, | |
554 | .maxlen = sizeof(int), | |
555 | .mode = 0644, | |
6d9f239a | 556 | .proc_handler = proc_dointvec |
1da177e4 LT |
557 | }, |
558 | { | |
1da177e4 LT |
559 | .procname = "tcp_frto", |
560 | .data = &sysctl_tcp_frto, | |
561 | .maxlen = sizeof(int), | |
562 | .mode = 0644, | |
6d9f239a | 563 | .proc_handler = proc_dointvec |
1da177e4 LT |
564 | }, |
565 | { | |
1da177e4 LT |
566 | .procname = "tcp_low_latency", |
567 | .data = &sysctl_tcp_low_latency, | |
568 | .maxlen = sizeof(int), | |
569 | .mode = 0644, | |
6d9f239a | 570 | .proc_handler = proc_dointvec |
1da177e4 | 571 | }, |
1da177e4 | 572 | { |
1da177e4 LT |
573 | .procname = "tcp_no_metrics_save", |
574 | .data = &sysctl_tcp_nometrics_save, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
6d9f239a | 577 | .proc_handler = proc_dointvec, |
1da177e4 | 578 | }, |
1da177e4 | 579 | { |
1da177e4 LT |
580 | .procname = "tcp_moderate_rcvbuf", |
581 | .data = &sysctl_tcp_moderate_rcvbuf, | |
582 | .maxlen = sizeof(int), | |
583 | .mode = 0644, | |
6d9f239a | 584 | .proc_handler = proc_dointvec, |
1da177e4 LT |
585 | }, |
586 | { | |
1da177e4 LT |
587 | .procname = "tcp_tso_win_divisor", |
588 | .data = &sysctl_tcp_tso_win_divisor, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d9f239a | 591 | .proc_handler = proc_dointvec, |
1da177e4 LT |
592 | }, |
593 | { | |
317a76f9 | 594 | .procname = "tcp_congestion_control", |
1da177e4 | 595 | .mode = 0644, |
317a76f9 | 596 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 597 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 598 | }, |
5d424d5a | 599 | { |
5d424d5a JH |
600 | .procname = "tcp_mtu_probing", |
601 | .data = &sysctl_tcp_mtu_probing, | |
602 | .maxlen = sizeof(int), | |
603 | .mode = 0644, | |
6d9f239a | 604 | .proc_handler = proc_dointvec, |
5d424d5a JH |
605 | }, |
606 | { | |
5d424d5a JH |
607 | .procname = "tcp_base_mss", |
608 | .data = &sysctl_tcp_base_mss, | |
609 | .maxlen = sizeof(int), | |
610 | .mode = 0644, | |
6d9f239a | 611 | .proc_handler = proc_dointvec, |
5d424d5a | 612 | }, |
e905a9ed | 613 | { |
15d99e02 RJ |
614 | .procname = "tcp_workaround_signed_windows", |
615 | .data = &sysctl_tcp_workaround_signed_windows, | |
616 | .maxlen = sizeof(int), | |
617 | .mode = 0644, | |
6d9f239a | 618 | .proc_handler = proc_dointvec |
15d99e02 | 619 | }, |
46d3ceab ED |
620 | { |
621 | .procname = "tcp_limit_output_bytes", | |
622 | .data = &sysctl_tcp_limit_output_bytes, | |
623 | .maxlen = sizeof(int), | |
624 | .mode = 0644, | |
625 | .proc_handler = proc_dointvec | |
626 | }, | |
282f23c6 ED |
627 | { |
628 | .procname = "tcp_challenge_ack_limit", | |
629 | .data = &sysctl_tcp_challenge_ack_limit, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
632 | .proc_handler = proc_dointvec | |
633 | }, | |
95937825 CL |
634 | #ifdef CONFIG_NET_DMA |
635 | { | |
95937825 CL |
636 | .procname = "tcp_dma_copybreak", |
637 | .data = &sysctl_tcp_dma_copybreak, | |
638 | .maxlen = sizeof(int), | |
639 | .mode = 0644, | |
6d9f239a | 640 | .proc_handler = proc_dointvec |
95937825 CL |
641 | }, |
642 | #endif | |
35089bb2 | 643 | { |
35089bb2 DM |
644 | .procname = "tcp_slow_start_after_idle", |
645 | .data = &sysctl_tcp_slow_start_after_idle, | |
646 | .maxlen = sizeof(int), | |
647 | .mode = 0644, | |
6d9f239a | 648 | .proc_handler = proc_dointvec |
35089bb2 | 649 | }, |
446fda4f PM |
650 | #ifdef CONFIG_NETLABEL |
651 | { | |
446fda4f PM |
652 | .procname = "cipso_cache_enable", |
653 | .data = &cipso_v4_cache_enabled, | |
654 | .maxlen = sizeof(int), | |
655 | .mode = 0644, | |
6d9f239a | 656 | .proc_handler = proc_dointvec, |
446fda4f PM |
657 | }, |
658 | { | |
446fda4f PM |
659 | .procname = "cipso_cache_bucket_size", |
660 | .data = &cipso_v4_cache_bucketsize, | |
661 | .maxlen = sizeof(int), | |
662 | .mode = 0644, | |
6d9f239a | 663 | .proc_handler = proc_dointvec, |
446fda4f PM |
664 | }, |
665 | { | |
446fda4f PM |
666 | .procname = "cipso_rbm_optfmt", |
667 | .data = &cipso_v4_rbm_optfmt, | |
668 | .maxlen = sizeof(int), | |
669 | .mode = 0644, | |
6d9f239a | 670 | .proc_handler = proc_dointvec, |
446fda4f PM |
671 | }, |
672 | { | |
446fda4f PM |
673 | .procname = "cipso_rbm_strictvalid", |
674 | .data = &cipso_v4_rbm_strictvalid, | |
675 | .maxlen = sizeof(int), | |
676 | .mode = 0644, | |
6d9f239a | 677 | .proc_handler = proc_dointvec, |
446fda4f PM |
678 | }, |
679 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 680 | { |
3ff825b2 SH |
681 | .procname = "tcp_available_congestion_control", |
682 | .maxlen = TCP_CA_BUF_MAX, | |
683 | .mode = 0444, | |
6d9f239a | 684 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 685 | }, |
ce7bc3bf | 686 | { |
ce7bc3bf SH |
687 | .procname = "tcp_allowed_congestion_control", |
688 | .maxlen = TCP_CA_BUF_MAX, | |
689 | .mode = 0644, | |
6d9f239a | 690 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 691 | }, |
36e31b0a AP |
692 | { |
693 | .procname = "tcp_thin_linear_timeouts", | |
694 | .data = &sysctl_tcp_thin_linear_timeouts, | |
695 | .maxlen = sizeof(int), | |
696 | .mode = 0644, | |
697 | .proc_handler = proc_dointvec | |
698 | }, | |
5797deb6 | 699 | { |
7e380175 AP |
700 | .procname = "tcp_thin_dupack", |
701 | .data = &sysctl_tcp_thin_dupack, | |
702 | .maxlen = sizeof(int), | |
703 | .mode = 0644, | |
704 | .proc_handler = proc_dointvec | |
705 | }, | |
eed530b6 YC |
706 | { |
707 | .procname = "tcp_early_retrans", | |
708 | .data = &sysctl_tcp_early_retrans, | |
709 | .maxlen = sizeof(int), | |
710 | .mode = 0644, | |
711 | .proc_handler = proc_dointvec_minmax, | |
712 | .extra1 = &zero, | |
6ba8a3b1 | 713 | .extra2 = &four, |
eed530b6 | 714 | }, |
95bd09eb ED |
715 | { |
716 | .procname = "tcp_min_tso_segs", | |
717 | .data = &sysctl_tcp_min_tso_segs, | |
718 | .maxlen = sizeof(int), | |
719 | .mode = 0644, | |
720 | .proc_handler = proc_dointvec_minmax, | |
721 | .extra1 = &zero, | |
722 | .extra2 = &gso_max_segs, | |
723 | }, | |
f54b3111 ED |
724 | { |
725 | .procname = "tcp_autocorking", | |
726 | .data = &sysctl_tcp_autocorking, | |
727 | .maxlen = sizeof(int), | |
728 | .mode = 0644, | |
729 | .proc_handler = proc_dointvec_minmax, | |
730 | .extra1 = &zero, | |
731 | .extra2 = &one, | |
732 | }, | |
95766fff | 733 | { |
95766fff HA |
734 | .procname = "udp_mem", |
735 | .data = &sysctl_udp_mem, | |
736 | .maxlen = sizeof(sysctl_udp_mem), | |
737 | .mode = 0644, | |
8d987e5c | 738 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
739 | }, |
740 | { | |
95766fff HA |
741 | .procname = "udp_rmem_min", |
742 | .data = &sysctl_udp_rmem_min, | |
743 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
744 | .mode = 0644, | |
6d9f239a | 745 | .proc_handler = proc_dointvec_minmax, |
cdda8891 | 746 | .extra1 = &one |
95766fff HA |
747 | }, |
748 | { | |
95766fff HA |
749 | .procname = "udp_wmem_min", |
750 | .data = &sysctl_udp_wmem_min, | |
751 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
752 | .mode = 0644, | |
6d9f239a | 753 | .proc_handler = proc_dointvec_minmax, |
cdda8891 | 754 | .extra1 = &one |
95766fff | 755 | }, |
f8572d8f | 756 | { } |
1da177e4 | 757 | }; |
3e37c3f9 | 758 | |
68528f09 PE |
759 | static struct ctl_table ipv4_net_table[] = { |
760 | { | |
68528f09 PE |
761 | .procname = "icmp_echo_ignore_all", |
762 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
763 | .maxlen = sizeof(int), | |
764 | .mode = 0644, | |
6d9f239a | 765 | .proc_handler = proc_dointvec |
68528f09 PE |
766 | }, |
767 | { | |
68528f09 PE |
768 | .procname = "icmp_echo_ignore_broadcasts", |
769 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
770 | .maxlen = sizeof(int), | |
771 | .mode = 0644, | |
6d9f239a | 772 | .proc_handler = proc_dointvec |
68528f09 PE |
773 | }, |
774 | { | |
68528f09 PE |
775 | .procname = "icmp_ignore_bogus_error_responses", |
776 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
777 | .maxlen = sizeof(int), | |
778 | .mode = 0644, | |
6d9f239a | 779 | .proc_handler = proc_dointvec |
68528f09 PE |
780 | }, |
781 | { | |
68528f09 PE |
782 | .procname = "icmp_errors_use_inbound_ifaddr", |
783 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
784 | .maxlen = sizeof(int), | |
785 | .mode = 0644, | |
6d9f239a | 786 | .proc_handler = proc_dointvec |
68528f09 PE |
787 | }, |
788 | { | |
68528f09 PE |
789 | .procname = "icmp_ratelimit", |
790 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
791 | .maxlen = sizeof(int), | |
792 | .mode = 0644, | |
6d9f239a | 793 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
794 | }, |
795 | { | |
68528f09 PE |
796 | .procname = "icmp_ratemask", |
797 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
798 | .maxlen = sizeof(int), | |
799 | .mode = 0644, | |
6d9f239a | 800 | .proc_handler = proc_dointvec |
68528f09 | 801 | }, |
c319b4d7 VK |
802 | { |
803 | .procname = "ping_group_range", | |
ba6b918a | 804 | .data = &init_net.ipv4.ping_group_range.range, |
7064d16e | 805 | .maxlen = sizeof(gid_t)*2, |
c319b4d7 VK |
806 | .mode = 0644, |
807 | .proc_handler = ipv4_ping_group_range, | |
808 | }, | |
5d134f1c HFS |
809 | { |
810 | .procname = "tcp_ecn", | |
811 | .data = &init_net.ipv4.sysctl_tcp_ecn, | |
812 | .maxlen = sizeof(int), | |
813 | .mode = 0644, | |
814 | .proc_handler = proc_dointvec | |
815 | }, | |
0bbf87d8 EB |
816 | { |
817 | .procname = "ip_local_port_range", | |
c9d8f1a6 CW |
818 | .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), |
819 | .data = &init_net.ipv4.ip_local_ports.range, | |
0bbf87d8 EB |
820 | .mode = 0644, |
821 | .proc_handler = ipv4_local_port_range, | |
822 | }, | |
122ff243 WC |
823 | { |
824 | .procname = "ip_local_reserved_ports", | |
825 | .data = &init_net.ipv4.sysctl_local_reserved_ports, | |
826 | .maxlen = 65536, | |
827 | .mode = 0644, | |
828 | .proc_handler = proc_do_large_bitmap, | |
829 | }, | |
974eda11 HFS |
830 | { |
831 | .procname = "ip_no_pmtu_disc", | |
832 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, | |
833 | .maxlen = sizeof(int), | |
834 | .mode = 0644, | |
835 | .proc_handler = proc_dointvec | |
836 | }, | |
f87c10a8 HFS |
837 | { |
838 | .procname = "ip_forward_use_pmtu", | |
839 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, | |
840 | .maxlen = sizeof(int), | |
841 | .mode = 0644, | |
842 | .proc_handler = proc_dointvec, | |
843 | }, | |
49a60158 VB |
844 | { |
845 | .procname = "ip_nonlocal_bind", | |
846 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, | |
847 | .maxlen = sizeof(int), | |
848 | .mode = 0644, | |
849 | .proc_handler = proc_dointvec | |
850 | }, | |
e110861f LC |
851 | { |
852 | .procname = "fwmark_reflect", | |
853 | .data = &init_net.ipv4.sysctl_fwmark_reflect, | |
854 | .maxlen = sizeof(int), | |
855 | .mode = 0644, | |
856 | .proc_handler = proc_dointvec, | |
857 | }, | |
84f39b08 LC |
858 | { |
859 | .procname = "tcp_fwmark_accept", | |
860 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, | |
861 | .maxlen = sizeof(int), | |
862 | .mode = 0644, | |
863 | .proc_handler = proc_dointvec, | |
864 | }, | |
68528f09 PE |
865 | { } |
866 | }; | |
867 | ||
1577519d PE |
868 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
869 | { | |
68528f09 PE |
870 | struct ctl_table *table; |
871 | ||
872 | table = ipv4_net_table; | |
09ad9bc7 | 873 | if (!net_eq(net, &init_net)) { |
0a6fa23d EB |
874 | int i; |
875 | ||
68528f09 PE |
876 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
877 | if (table == NULL) | |
878 | goto err_alloc; | |
879 | ||
0a6fa23d EB |
880 | /* Update the variables to point into the current struct net */ |
881 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) | |
882 | table[i].data += (void *)net - (void *)&init_net; | |
68528f09 PE |
883 | } |
884 | ||
ec8f23ce | 885 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
68528f09 PE |
886 | if (net->ipv4.ipv4_hdr == NULL) |
887 | goto err_reg; | |
888 | ||
122ff243 WC |
889 | net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
890 | if (!net->ipv4.sysctl_local_reserved_ports) | |
891 | goto err_ports; | |
892 | ||
1577519d | 893 | return 0; |
68528f09 | 894 | |
122ff243 WC |
895 | err_ports: |
896 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
68528f09 | 897 | err_reg: |
09ad9bc7 | 898 | if (!net_eq(net, &init_net)) |
68528f09 PE |
899 | kfree(table); |
900 | err_alloc: | |
901 | return -ENOMEM; | |
1577519d PE |
902 | } |
903 | ||
904 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
905 | { | |
68528f09 PE |
906 | struct ctl_table *table; |
907 | ||
122ff243 | 908 | kfree(net->ipv4.sysctl_local_reserved_ports); |
68528f09 PE |
909 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
910 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
911 | kfree(table); | |
1577519d PE |
912 | } |
913 | ||
914 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
915 | .init = ipv4_sysctl_init_net, | |
916 | .exit = ipv4_sysctl_exit_net, | |
917 | }; | |
918 | ||
3e37c3f9 PE |
919 | static __init int sysctl_ipv4_init(void) |
920 | { | |
921 | struct ctl_table_header *hdr; | |
922 | ||
ec8f23ce | 923 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
1577519d PE |
924 | if (hdr == NULL) |
925 | return -ENOMEM; | |
926 | ||
927 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 928 | unregister_net_sysctl_table(hdr); |
1577519d PE |
929 | return -ENOMEM; |
930 | } | |
931 | ||
932 | return 0; | |
3e37c3f9 PE |
933 | } |
934 | ||
935 | __initcall(sysctl_ipv4_init); |