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> |
1da177e4 | 17 | #include <net/snmp.h> |
20380731 | 18 | #include <net/icmp.h> |
1da177e4 LT |
19 | #include <net/ip.h> |
20 | #include <net/route.h> | |
21 | #include <net/tcp.h> | |
95766fff | 22 | #include <net/udp.h> |
446fda4f | 23 | #include <net/cipso_ipv4.h> |
04128f23 | 24 | #include <net/inet_frag.h> |
c319b4d7 | 25 | #include <net/ping.h> |
1da177e4 | 26 | |
89cee8b1 | 27 | static int zero; |
e905a9ed | 28 | static int tcp_retr1_max = 255; |
1da177e4 LT |
29 | static int ip_local_port_range_min[] = { 1, 1 }; |
30 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
31 | static int tcp_adv_win_scale_min = -31; |
32 | static int tcp_adv_win_scale_max = 31; | |
249fab77 ED |
33 | static int ip_ttl_min = 1; |
34 | static int ip_ttl_max = 255; | |
c319b4d7 VK |
35 | static int ip_ping_group_range_min[] = { 0, 0 }; |
36 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 37 | |
227b60f5 SH |
38 | /* Update system visible IP port range */ |
39 | static void set_local_port_range(int range[2]) | |
40 | { | |
3c689b73 ED |
41 | write_seqlock(&sysctl_local_ports.lock); |
42 | sysctl_local_ports.range[0] = range[0]; | |
43 | sysctl_local_ports.range[1] = range[1]; | |
44 | write_sequnlock(&sysctl_local_ports.lock); | |
227b60f5 SH |
45 | } |
46 | ||
47 | /* Validate changes from /proc interface. */ | |
8d65af78 | 48 | static int ipv4_local_port_range(ctl_table *table, int write, |
227b60f5 SH |
49 | void __user *buffer, |
50 | size_t *lenp, loff_t *ppos) | |
51 | { | |
52 | int ret; | |
3c689b73 | 53 | int range[2]; |
227b60f5 SH |
54 | ctl_table tmp = { |
55 | .data = &range, | |
56 | .maxlen = sizeof(range), | |
57 | .mode = table->mode, | |
58 | .extra1 = &ip_local_port_range_min, | |
59 | .extra2 = &ip_local_port_range_max, | |
60 | }; | |
61 | ||
3c689b73 | 62 | inet_get_local_port_range(range, range + 1); |
8d65af78 | 63 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
64 | |
65 | if (write && ret == 0) { | |
a25de534 | 66 | if (range[1] < range[0]) |
227b60f5 SH |
67 | ret = -EINVAL; |
68 | else | |
69 | set_local_port_range(range); | |
70 | } | |
71 | ||
72 | return ret; | |
73 | } | |
74 | ||
c319b4d7 | 75 | |
c319b4d7 VK |
76 | void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high) |
77 | { | |
78 | gid_t *data = table->data; | |
79 | unsigned seq; | |
80 | do { | |
81 | seq = read_seqbegin(&sysctl_local_ports.lock); | |
82 | ||
83 | *low = data[0]; | |
84 | *high = data[1]; | |
85 | } while (read_seqretry(&sysctl_local_ports.lock, seq)); | |
86 | } | |
87 | ||
88 | /* Update system visible IP port range */ | |
89 | static void set_ping_group_range(struct ctl_table *table, int range[2]) | |
90 | { | |
91 | gid_t *data = table->data; | |
92 | write_seqlock(&sysctl_local_ports.lock); | |
93 | data[0] = range[0]; | |
94 | data[1] = range[1]; | |
95 | write_sequnlock(&sysctl_local_ports.lock); | |
96 | } | |
97 | ||
98 | /* Validate changes from /proc interface. */ | |
99 | static int ipv4_ping_group_range(ctl_table *table, int write, | |
100 | void __user *buffer, | |
101 | size_t *lenp, loff_t *ppos) | |
102 | { | |
103 | int ret; | |
104 | gid_t range[2]; | |
105 | ctl_table tmp = { | |
106 | .data = &range, | |
107 | .maxlen = sizeof(range), | |
108 | .mode = table->mode, | |
109 | .extra1 = &ip_ping_group_range_min, | |
110 | .extra2 = &ip_ping_group_range_max, | |
111 | }; | |
112 | ||
113 | inet_get_ping_group_range_table(table, range, range + 1); | |
114 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
115 | ||
116 | if (write && ret == 0) | |
117 | set_ping_group_range(table, range); | |
118 | ||
119 | return ret; | |
120 | } | |
121 | ||
8d65af78 | 122 | static int proc_tcp_congestion_control(ctl_table *ctl, int write, |
317a76f9 SH |
123 | void __user *buffer, size_t *lenp, loff_t *ppos) |
124 | { | |
125 | char val[TCP_CA_NAME_MAX]; | |
126 | ctl_table tbl = { | |
127 | .data = val, | |
128 | .maxlen = TCP_CA_NAME_MAX, | |
129 | }; | |
130 | int ret; | |
131 | ||
132 | tcp_get_default_congestion_control(val); | |
133 | ||
8d65af78 | 134 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
135 | if (write && ret == 0) |
136 | ret = tcp_set_default_congestion_control(val); | |
137 | return ret; | |
138 | } | |
139 | ||
3ff825b2 | 140 | static int proc_tcp_available_congestion_control(ctl_table *ctl, |
8d65af78 | 141 | int write, |
3ff825b2 SH |
142 | void __user *buffer, size_t *lenp, |
143 | loff_t *ppos) | |
144 | { | |
145 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; | |
146 | int ret; | |
147 | ||
148 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
149 | if (!tbl.data) | |
150 | return -ENOMEM; | |
151 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 152 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
153 | kfree(tbl.data); |
154 | return ret; | |
155 | } | |
156 | ||
ce7bc3bf | 157 | static int proc_allowed_congestion_control(ctl_table *ctl, |
8d65af78 | 158 | int write, |
ce7bc3bf SH |
159 | void __user *buffer, size_t *lenp, |
160 | loff_t *ppos) | |
161 | { | |
162 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; | |
163 | int ret; | |
164 | ||
165 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
166 | if (!tbl.data) | |
167 | return -ENOMEM; | |
168 | ||
169 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 170 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
171 | if (write && ret == 0) |
172 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
173 | kfree(tbl.data); | |
174 | return ret; | |
175 | } | |
176 | ||
3e37c3f9 | 177 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 178 | { |
1da177e4 LT |
179 | .procname = "tcp_timestamps", |
180 | .data = &sysctl_tcp_timestamps, | |
181 | .maxlen = sizeof(int), | |
182 | .mode = 0644, | |
6d9f239a | 183 | .proc_handler = proc_dointvec |
1da177e4 | 184 | }, |
e905a9ed | 185 | { |
1da177e4 LT |
186 | .procname = "tcp_window_scaling", |
187 | .data = &sysctl_tcp_window_scaling, | |
188 | .maxlen = sizeof(int), | |
189 | .mode = 0644, | |
6d9f239a | 190 | .proc_handler = proc_dointvec |
1da177e4 | 191 | }, |
e905a9ed | 192 | { |
1da177e4 LT |
193 | .procname = "tcp_sack", |
194 | .data = &sysctl_tcp_sack, | |
195 | .maxlen = sizeof(int), | |
196 | .mode = 0644, | |
6d9f239a | 197 | .proc_handler = proc_dointvec |
1da177e4 | 198 | }, |
e905a9ed | 199 | { |
1da177e4 LT |
200 | .procname = "tcp_retrans_collapse", |
201 | .data = &sysctl_tcp_retrans_collapse, | |
202 | .maxlen = sizeof(int), | |
203 | .mode = 0644, | |
6d9f239a | 204 | .proc_handler = proc_dointvec |
1da177e4 | 205 | }, |
e905a9ed | 206 | { |
1da177e4 | 207 | .procname = "ip_default_ttl", |
e905a9ed | 208 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
209 | .maxlen = sizeof(int), |
210 | .mode = 0644, | |
249fab77 ED |
211 | .proc_handler = proc_dointvec_minmax, |
212 | .extra1 = &ip_ttl_min, | |
213 | .extra2 = &ip_ttl_max, | |
1da177e4 | 214 | }, |
e905a9ed | 215 | { |
1da177e4 LT |
216 | .procname = "ip_no_pmtu_disc", |
217 | .data = &ipv4_config.no_pmtu_disc, | |
218 | .maxlen = sizeof(int), | |
219 | .mode = 0644, | |
6d9f239a | 220 | .proc_handler = proc_dointvec |
1da177e4 LT |
221 | }, |
222 | { | |
1da177e4 LT |
223 | .procname = "ip_nonlocal_bind", |
224 | .data = &sysctl_ip_nonlocal_bind, | |
225 | .maxlen = sizeof(int), | |
226 | .mode = 0644, | |
6d9f239a | 227 | .proc_handler = proc_dointvec |
1da177e4 LT |
228 | }, |
229 | { | |
1da177e4 LT |
230 | .procname = "tcp_syn_retries", |
231 | .data = &sysctl_tcp_syn_retries, | |
232 | .maxlen = sizeof(int), | |
233 | .mode = 0644, | |
6d9f239a | 234 | .proc_handler = proc_dointvec |
1da177e4 LT |
235 | }, |
236 | { | |
1da177e4 LT |
237 | .procname = "tcp_synack_retries", |
238 | .data = &sysctl_tcp_synack_retries, | |
239 | .maxlen = sizeof(int), | |
240 | .mode = 0644, | |
6d9f239a | 241 | .proc_handler = proc_dointvec |
1da177e4 LT |
242 | }, |
243 | { | |
1da177e4 LT |
244 | .procname = "tcp_max_orphans", |
245 | .data = &sysctl_tcp_max_orphans, | |
246 | .maxlen = sizeof(int), | |
247 | .mode = 0644, | |
6d9f239a | 248 | .proc_handler = proc_dointvec |
1da177e4 LT |
249 | }, |
250 | { | |
1da177e4 | 251 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 252 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
253 | .maxlen = sizeof(int), |
254 | .mode = 0644, | |
6d9f239a | 255 | .proc_handler = proc_dointvec |
1da177e4 | 256 | }, |
1da177e4 | 257 | { |
1da177e4 LT |
258 | .procname = "ip_dynaddr", |
259 | .data = &sysctl_ip_dynaddr, | |
260 | .maxlen = sizeof(int), | |
261 | .mode = 0644, | |
6d9f239a | 262 | .proc_handler = proc_dointvec |
1da177e4 | 263 | }, |
1da177e4 | 264 | { |
1da177e4 LT |
265 | .procname = "tcp_keepalive_time", |
266 | .data = &sysctl_tcp_keepalive_time, | |
267 | .maxlen = sizeof(int), | |
268 | .mode = 0644, | |
6d9f239a | 269 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
270 | }, |
271 | { | |
1da177e4 LT |
272 | .procname = "tcp_keepalive_probes", |
273 | .data = &sysctl_tcp_keepalive_probes, | |
274 | .maxlen = sizeof(int), | |
275 | .mode = 0644, | |
6d9f239a | 276 | .proc_handler = proc_dointvec |
1da177e4 LT |
277 | }, |
278 | { | |
1da177e4 LT |
279 | .procname = "tcp_keepalive_intvl", |
280 | .data = &sysctl_tcp_keepalive_intvl, | |
281 | .maxlen = sizeof(int), | |
282 | .mode = 0644, | |
6d9f239a | 283 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
284 | }, |
285 | { | |
1da177e4 LT |
286 | .procname = "tcp_retries1", |
287 | .data = &sysctl_tcp_retries1, | |
288 | .maxlen = sizeof(int), | |
289 | .mode = 0644, | |
6d9f239a | 290 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
291 | .extra2 = &tcp_retr1_max |
292 | }, | |
293 | { | |
1da177e4 LT |
294 | .procname = "tcp_retries2", |
295 | .data = &sysctl_tcp_retries2, | |
296 | .maxlen = sizeof(int), | |
297 | .mode = 0644, | |
6d9f239a | 298 | .proc_handler = proc_dointvec |
1da177e4 LT |
299 | }, |
300 | { | |
1da177e4 LT |
301 | .procname = "tcp_fin_timeout", |
302 | .data = &sysctl_tcp_fin_timeout, | |
303 | .maxlen = sizeof(int), | |
304 | .mode = 0644, | |
6d9f239a | 305 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
306 | }, |
307 | #ifdef CONFIG_SYN_COOKIES | |
308 | { | |
1da177e4 LT |
309 | .procname = "tcp_syncookies", |
310 | .data = &sysctl_tcp_syncookies, | |
311 | .maxlen = sizeof(int), | |
312 | .mode = 0644, | |
6d9f239a | 313 | .proc_handler = proc_dointvec |
1da177e4 LT |
314 | }, |
315 | #endif | |
316 | { | |
1da177e4 | 317 | .procname = "tcp_tw_recycle", |
295ff7ed | 318 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
319 | .maxlen = sizeof(int), |
320 | .mode = 0644, | |
6d9f239a | 321 | .proc_handler = proc_dointvec |
1da177e4 LT |
322 | }, |
323 | { | |
1da177e4 LT |
324 | .procname = "tcp_abort_on_overflow", |
325 | .data = &sysctl_tcp_abort_on_overflow, | |
326 | .maxlen = sizeof(int), | |
327 | .mode = 0644, | |
6d9f239a | 328 | .proc_handler = proc_dointvec |
1da177e4 LT |
329 | }, |
330 | { | |
1da177e4 LT |
331 | .procname = "tcp_stdurg", |
332 | .data = &sysctl_tcp_stdurg, | |
333 | .maxlen = sizeof(int), | |
334 | .mode = 0644, | |
6d9f239a | 335 | .proc_handler = proc_dointvec |
1da177e4 LT |
336 | }, |
337 | { | |
1da177e4 LT |
338 | .procname = "tcp_rfc1337", |
339 | .data = &sysctl_tcp_rfc1337, | |
340 | .maxlen = sizeof(int), | |
341 | .mode = 0644, | |
6d9f239a | 342 | .proc_handler = proc_dointvec |
1da177e4 LT |
343 | }, |
344 | { | |
1da177e4 LT |
345 | .procname = "tcp_max_syn_backlog", |
346 | .data = &sysctl_max_syn_backlog, | |
347 | .maxlen = sizeof(int), | |
348 | .mode = 0644, | |
6d9f239a | 349 | .proc_handler = proc_dointvec |
1da177e4 LT |
350 | }, |
351 | { | |
1da177e4 | 352 | .procname = "ip_local_port_range", |
3c689b73 ED |
353 | .data = &sysctl_local_ports.range, |
354 | .maxlen = sizeof(sysctl_local_ports.range), | |
1da177e4 | 355 | .mode = 0644, |
6d9f239a | 356 | .proc_handler = ipv4_local_port_range, |
1da177e4 | 357 | }, |
e3826f1e AW |
358 | { |
359 | .procname = "ip_local_reserved_ports", | |
360 | .data = NULL, /* initialized in sysctl_ipv4_init */ | |
361 | .maxlen = 65536, | |
362 | .mode = 0644, | |
363 | .proc_handler = proc_do_large_bitmap, | |
364 | }, | |
1da177e4 | 365 | { |
1da177e4 LT |
366 | .procname = "igmp_max_memberships", |
367 | .data = &sysctl_igmp_max_memberships, | |
368 | .maxlen = sizeof(int), | |
369 | .mode = 0644, | |
6d9f239a | 370 | .proc_handler = proc_dointvec |
1da177e4 | 371 | }, |
1da177e4 | 372 | { |
1da177e4 LT |
373 | .procname = "igmp_max_msf", |
374 | .data = &sysctl_igmp_max_msf, | |
375 | .maxlen = sizeof(int), | |
376 | .mode = 0644, | |
6d9f239a | 377 | .proc_handler = proc_dointvec |
1da177e4 LT |
378 | }, |
379 | { | |
1da177e4 LT |
380 | .procname = "inet_peer_threshold", |
381 | .data = &inet_peer_threshold, | |
382 | .maxlen = sizeof(int), | |
383 | .mode = 0644, | |
6d9f239a | 384 | .proc_handler = proc_dointvec |
1da177e4 LT |
385 | }, |
386 | { | |
1da177e4 LT |
387 | .procname = "inet_peer_minttl", |
388 | .data = &inet_peer_minttl, | |
389 | .maxlen = sizeof(int), | |
390 | .mode = 0644, | |
6d9f239a | 391 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
392 | }, |
393 | { | |
1da177e4 LT |
394 | .procname = "inet_peer_maxttl", |
395 | .data = &inet_peer_maxttl, | |
396 | .maxlen = sizeof(int), | |
397 | .mode = 0644, | |
6d9f239a | 398 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 399 | }, |
1da177e4 | 400 | { |
1da177e4 LT |
401 | .procname = "tcp_orphan_retries", |
402 | .data = &sysctl_tcp_orphan_retries, | |
403 | .maxlen = sizeof(int), | |
404 | .mode = 0644, | |
6d9f239a | 405 | .proc_handler = proc_dointvec |
1da177e4 LT |
406 | }, |
407 | { | |
1da177e4 LT |
408 | .procname = "tcp_fack", |
409 | .data = &sysctl_tcp_fack, | |
410 | .maxlen = sizeof(int), | |
411 | .mode = 0644, | |
6d9f239a | 412 | .proc_handler = proc_dointvec |
1da177e4 LT |
413 | }, |
414 | { | |
1da177e4 LT |
415 | .procname = "tcp_reordering", |
416 | .data = &sysctl_tcp_reordering, | |
417 | .maxlen = sizeof(int), | |
418 | .mode = 0644, | |
6d9f239a | 419 | .proc_handler = proc_dointvec |
1da177e4 LT |
420 | }, |
421 | { | |
1da177e4 LT |
422 | .procname = "tcp_ecn", |
423 | .data = &sysctl_tcp_ecn, | |
424 | .maxlen = sizeof(int), | |
425 | .mode = 0644, | |
6d9f239a | 426 | .proc_handler = proc_dointvec |
1da177e4 LT |
427 | }, |
428 | { | |
1da177e4 LT |
429 | .procname = "tcp_dsack", |
430 | .data = &sysctl_tcp_dsack, | |
431 | .maxlen = sizeof(int), | |
432 | .mode = 0644, | |
6d9f239a | 433 | .proc_handler = proc_dointvec |
1da177e4 LT |
434 | }, |
435 | { | |
1da177e4 LT |
436 | .procname = "tcp_mem", |
437 | .data = &sysctl_tcp_mem, | |
438 | .maxlen = sizeof(sysctl_tcp_mem), | |
439 | .mode = 0644, | |
8d987e5c | 440 | .proc_handler = proc_doulongvec_minmax |
1da177e4 LT |
441 | }, |
442 | { | |
1da177e4 LT |
443 | .procname = "tcp_wmem", |
444 | .data = &sysctl_tcp_wmem, | |
445 | .maxlen = sizeof(sysctl_tcp_wmem), | |
446 | .mode = 0644, | |
6d9f239a | 447 | .proc_handler = proc_dointvec |
1da177e4 LT |
448 | }, |
449 | { | |
1da177e4 LT |
450 | .procname = "tcp_rmem", |
451 | .data = &sysctl_tcp_rmem, | |
452 | .maxlen = sizeof(sysctl_tcp_rmem), | |
453 | .mode = 0644, | |
6d9f239a | 454 | .proc_handler = proc_dointvec |
1da177e4 LT |
455 | }, |
456 | { | |
1da177e4 LT |
457 | .procname = "tcp_app_win", |
458 | .data = &sysctl_tcp_app_win, | |
459 | .maxlen = sizeof(int), | |
460 | .mode = 0644, | |
6d9f239a | 461 | .proc_handler = proc_dointvec |
1da177e4 LT |
462 | }, |
463 | { | |
1da177e4 LT |
464 | .procname = "tcp_adv_win_scale", |
465 | .data = &sysctl_tcp_adv_win_scale, | |
466 | .maxlen = sizeof(int), | |
467 | .mode = 0644, | |
0147fc05 AD |
468 | .proc_handler = proc_dointvec_minmax, |
469 | .extra1 = &tcp_adv_win_scale_min, | |
470 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 471 | }, |
1da177e4 | 472 | { |
1da177e4 LT |
473 | .procname = "tcp_tw_reuse", |
474 | .data = &sysctl_tcp_tw_reuse, | |
475 | .maxlen = sizeof(int), | |
476 | .mode = 0644, | |
6d9f239a | 477 | .proc_handler = proc_dointvec |
1da177e4 LT |
478 | }, |
479 | { | |
1da177e4 LT |
480 | .procname = "tcp_frto", |
481 | .data = &sysctl_tcp_frto, | |
482 | .maxlen = sizeof(int), | |
483 | .mode = 0644, | |
6d9f239a | 484 | .proc_handler = proc_dointvec |
1da177e4 | 485 | }, |
3cfe3baa | 486 | { |
3cfe3baa IJ |
487 | .procname = "tcp_frto_response", |
488 | .data = &sysctl_tcp_frto_response, | |
489 | .maxlen = sizeof(int), | |
490 | .mode = 0644, | |
6d9f239a | 491 | .proc_handler = proc_dointvec |
3cfe3baa | 492 | }, |
1da177e4 | 493 | { |
1da177e4 LT |
494 | .procname = "tcp_low_latency", |
495 | .data = &sysctl_tcp_low_latency, | |
496 | .maxlen = sizeof(int), | |
497 | .mode = 0644, | |
6d9f239a | 498 | .proc_handler = proc_dointvec |
1da177e4 | 499 | }, |
1da177e4 | 500 | { |
1da177e4 LT |
501 | .procname = "tcp_no_metrics_save", |
502 | .data = &sysctl_tcp_nometrics_save, | |
503 | .maxlen = sizeof(int), | |
504 | .mode = 0644, | |
6d9f239a | 505 | .proc_handler = proc_dointvec, |
1da177e4 | 506 | }, |
1da177e4 | 507 | { |
1da177e4 LT |
508 | .procname = "tcp_moderate_rcvbuf", |
509 | .data = &sysctl_tcp_moderate_rcvbuf, | |
510 | .maxlen = sizeof(int), | |
511 | .mode = 0644, | |
6d9f239a | 512 | .proc_handler = proc_dointvec, |
1da177e4 LT |
513 | }, |
514 | { | |
1da177e4 LT |
515 | .procname = "tcp_tso_win_divisor", |
516 | .data = &sysctl_tcp_tso_win_divisor, | |
517 | .maxlen = sizeof(int), | |
518 | .mode = 0644, | |
6d9f239a | 519 | .proc_handler = proc_dointvec, |
1da177e4 LT |
520 | }, |
521 | { | |
317a76f9 | 522 | .procname = "tcp_congestion_control", |
1da177e4 | 523 | .mode = 0644, |
317a76f9 | 524 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 525 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 526 | }, |
9772efb9 | 527 | { |
9772efb9 SH |
528 | .procname = "tcp_abc", |
529 | .data = &sysctl_tcp_abc, | |
530 | .maxlen = sizeof(int), | |
531 | .mode = 0644, | |
6d9f239a | 532 | .proc_handler = proc_dointvec, |
9772efb9 | 533 | }, |
5d424d5a | 534 | { |
5d424d5a JH |
535 | .procname = "tcp_mtu_probing", |
536 | .data = &sysctl_tcp_mtu_probing, | |
537 | .maxlen = sizeof(int), | |
538 | .mode = 0644, | |
6d9f239a | 539 | .proc_handler = proc_dointvec, |
5d424d5a JH |
540 | }, |
541 | { | |
5d424d5a JH |
542 | .procname = "tcp_base_mss", |
543 | .data = &sysctl_tcp_base_mss, | |
544 | .maxlen = sizeof(int), | |
545 | .mode = 0644, | |
6d9f239a | 546 | .proc_handler = proc_dointvec, |
5d424d5a | 547 | }, |
e905a9ed | 548 | { |
15d99e02 RJ |
549 | .procname = "tcp_workaround_signed_windows", |
550 | .data = &sysctl_tcp_workaround_signed_windows, | |
551 | .maxlen = sizeof(int), | |
552 | .mode = 0644, | |
6d9f239a | 553 | .proc_handler = proc_dointvec |
15d99e02 | 554 | }, |
95937825 CL |
555 | #ifdef CONFIG_NET_DMA |
556 | { | |
95937825 CL |
557 | .procname = "tcp_dma_copybreak", |
558 | .data = &sysctl_tcp_dma_copybreak, | |
559 | .maxlen = sizeof(int), | |
560 | .mode = 0644, | |
6d9f239a | 561 | .proc_handler = proc_dointvec |
95937825 CL |
562 | }, |
563 | #endif | |
35089bb2 | 564 | { |
35089bb2 DM |
565 | .procname = "tcp_slow_start_after_idle", |
566 | .data = &sysctl_tcp_slow_start_after_idle, | |
567 | .maxlen = sizeof(int), | |
568 | .mode = 0644, | |
6d9f239a | 569 | .proc_handler = proc_dointvec |
35089bb2 | 570 | }, |
446fda4f PM |
571 | #ifdef CONFIG_NETLABEL |
572 | { | |
446fda4f PM |
573 | .procname = "cipso_cache_enable", |
574 | .data = &cipso_v4_cache_enabled, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
6d9f239a | 577 | .proc_handler = proc_dointvec, |
446fda4f PM |
578 | }, |
579 | { | |
446fda4f PM |
580 | .procname = "cipso_cache_bucket_size", |
581 | .data = &cipso_v4_cache_bucketsize, | |
582 | .maxlen = sizeof(int), | |
583 | .mode = 0644, | |
6d9f239a | 584 | .proc_handler = proc_dointvec, |
446fda4f PM |
585 | }, |
586 | { | |
446fda4f PM |
587 | .procname = "cipso_rbm_optfmt", |
588 | .data = &cipso_v4_rbm_optfmt, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d9f239a | 591 | .proc_handler = proc_dointvec, |
446fda4f PM |
592 | }, |
593 | { | |
446fda4f PM |
594 | .procname = "cipso_rbm_strictvalid", |
595 | .data = &cipso_v4_rbm_strictvalid, | |
596 | .maxlen = sizeof(int), | |
597 | .mode = 0644, | |
6d9f239a | 598 | .proc_handler = proc_dointvec, |
446fda4f PM |
599 | }, |
600 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 601 | { |
3ff825b2 SH |
602 | .procname = "tcp_available_congestion_control", |
603 | .maxlen = TCP_CA_BUF_MAX, | |
604 | .mode = 0444, | |
6d9f239a | 605 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 606 | }, |
ce7bc3bf | 607 | { |
ce7bc3bf SH |
608 | .procname = "tcp_allowed_congestion_control", |
609 | .maxlen = TCP_CA_BUF_MAX, | |
610 | .mode = 0644, | |
6d9f239a | 611 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 612 | }, |
886236c1 | 613 | { |
886236c1 JH |
614 | .procname = "tcp_max_ssthresh", |
615 | .data = &sysctl_tcp_max_ssthresh, | |
616 | .maxlen = sizeof(int), | |
617 | .mode = 0644, | |
6d9f239a | 618 | .proc_handler = proc_dointvec, |
886236c1 | 619 | }, |
519855c5 | 620 | { |
519855c5 WAS |
621 | .procname = "tcp_cookie_size", |
622 | .data = &sysctl_tcp_cookie_size, | |
623 | .maxlen = sizeof(int), | |
624 | .mode = 0644, | |
625 | .proc_handler = proc_dointvec | |
626 | }, | |
36e31b0a AP |
627 | { |
628 | .procname = "tcp_thin_linear_timeouts", | |
629 | .data = &sysctl_tcp_thin_linear_timeouts, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
632 | .proc_handler = proc_dointvec | |
633 | }, | |
7e380175 AP |
634 | { |
635 | .procname = "tcp_thin_dupack", | |
636 | .data = &sysctl_tcp_thin_dupack, | |
637 | .maxlen = sizeof(int), | |
638 | .mode = 0644, | |
639 | .proc_handler = proc_dointvec | |
640 | }, | |
95766fff | 641 | { |
95766fff HA |
642 | .procname = "udp_mem", |
643 | .data = &sysctl_udp_mem, | |
644 | .maxlen = sizeof(sysctl_udp_mem), | |
645 | .mode = 0644, | |
8d987e5c | 646 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
647 | }, |
648 | { | |
95766fff HA |
649 | .procname = "udp_rmem_min", |
650 | .data = &sysctl_udp_rmem_min, | |
651 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
652 | .mode = 0644, | |
6d9f239a | 653 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
654 | .extra1 = &zero |
655 | }, | |
656 | { | |
95766fff HA |
657 | .procname = "udp_wmem_min", |
658 | .data = &sysctl_udp_wmem_min, | |
659 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
660 | .mode = 0644, | |
6d9f239a | 661 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
662 | .extra1 = &zero |
663 | }, | |
f8572d8f | 664 | { } |
1da177e4 | 665 | }; |
3e37c3f9 | 666 | |
68528f09 PE |
667 | static struct ctl_table ipv4_net_table[] = { |
668 | { | |
68528f09 PE |
669 | .procname = "icmp_echo_ignore_all", |
670 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
671 | .maxlen = sizeof(int), | |
672 | .mode = 0644, | |
6d9f239a | 673 | .proc_handler = proc_dointvec |
68528f09 PE |
674 | }, |
675 | { | |
68528f09 PE |
676 | .procname = "icmp_echo_ignore_broadcasts", |
677 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
678 | .maxlen = sizeof(int), | |
679 | .mode = 0644, | |
6d9f239a | 680 | .proc_handler = proc_dointvec |
68528f09 PE |
681 | }, |
682 | { | |
68528f09 PE |
683 | .procname = "icmp_ignore_bogus_error_responses", |
684 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
685 | .maxlen = sizeof(int), | |
686 | .mode = 0644, | |
6d9f239a | 687 | .proc_handler = proc_dointvec |
68528f09 PE |
688 | }, |
689 | { | |
68528f09 PE |
690 | .procname = "icmp_errors_use_inbound_ifaddr", |
691 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
692 | .maxlen = sizeof(int), | |
693 | .mode = 0644, | |
6d9f239a | 694 | .proc_handler = proc_dointvec |
68528f09 PE |
695 | }, |
696 | { | |
68528f09 PE |
697 | .procname = "icmp_ratelimit", |
698 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
699 | .maxlen = sizeof(int), | |
700 | .mode = 0644, | |
6d9f239a | 701 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
702 | }, |
703 | { | |
68528f09 PE |
704 | .procname = "icmp_ratemask", |
705 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
706 | .maxlen = sizeof(int), | |
707 | .mode = 0644, | |
6d9f239a | 708 | .proc_handler = proc_dointvec |
68528f09 | 709 | }, |
1080d709 | 710 | { |
1080d709 NH |
711 | .procname = "rt_cache_rebuild_count", |
712 | .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, | |
713 | .maxlen = sizeof(int), | |
714 | .mode = 0644, | |
6d9f239a | 715 | .proc_handler = proc_dointvec |
1080d709 | 716 | }, |
c319b4d7 VK |
717 | { |
718 | .procname = "ping_group_range", | |
719 | .data = &init_net.ipv4.sysctl_ping_group_range, | |
720 | .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range), | |
721 | .mode = 0644, | |
722 | .proc_handler = ipv4_ping_group_range, | |
723 | }, | |
68528f09 PE |
724 | { } |
725 | }; | |
726 | ||
3d7cc2ba | 727 | struct ctl_path net_ipv4_ctl_path[] = { |
f8572d8f EB |
728 | { .procname = "net", }, |
729 | { .procname = "ipv4", }, | |
3e37c3f9 PE |
730 | { }, |
731 | }; | |
3d7cc2ba | 732 | EXPORT_SYMBOL_GPL(net_ipv4_ctl_path); |
3e37c3f9 | 733 | |
1577519d PE |
734 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
735 | { | |
68528f09 PE |
736 | struct ctl_table *table; |
737 | ||
738 | table = ipv4_net_table; | |
09ad9bc7 | 739 | if (!net_eq(net, &init_net)) { |
68528f09 PE |
740 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
741 | if (table == NULL) | |
742 | goto err_alloc; | |
743 | ||
744 | table[0].data = | |
745 | &net->ipv4.sysctl_icmp_echo_ignore_all; | |
746 | table[1].data = | |
747 | &net->ipv4.sysctl_icmp_echo_ignore_broadcasts; | |
748 | table[2].data = | |
749 | &net->ipv4.sysctl_icmp_ignore_bogus_error_responses; | |
750 | table[3].data = | |
751 | &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr; | |
752 | table[4].data = | |
753 | &net->ipv4.sysctl_icmp_ratelimit; | |
754 | table[5].data = | |
755 | &net->ipv4.sysctl_icmp_ratemask; | |
1080d709 NH |
756 | table[6].data = |
757 | &net->ipv4.sysctl_rt_cache_rebuild_count; | |
c319b4d7 VK |
758 | table[7].data = |
759 | &net->ipv4.sysctl_ping_group_range; | |
760 | ||
68528f09 PE |
761 | } |
762 | ||
c319b4d7 VK |
763 | /* |
764 | * Sane defaults - nobody may create ping sockets. | |
765 | * Boot scripts should set this to distro-specific group. | |
766 | */ | |
767 | net->ipv4.sysctl_ping_group_range[0] = 1; | |
768 | net->ipv4.sysctl_ping_group_range[1] = 0; | |
769 | ||
1080d709 NH |
770 | net->ipv4.sysctl_rt_cache_rebuild_count = 4; |
771 | ||
68528f09 PE |
772 | net->ipv4.ipv4_hdr = register_net_sysctl_table(net, |
773 | net_ipv4_ctl_path, table); | |
774 | if (net->ipv4.ipv4_hdr == NULL) | |
775 | goto err_reg; | |
776 | ||
1577519d | 777 | return 0; |
68528f09 PE |
778 | |
779 | err_reg: | |
09ad9bc7 | 780 | if (!net_eq(net, &init_net)) |
68528f09 PE |
781 | kfree(table); |
782 | err_alloc: | |
783 | return -ENOMEM; | |
1577519d PE |
784 | } |
785 | ||
786 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
787 | { | |
68528f09 PE |
788 | struct ctl_table *table; |
789 | ||
790 | table = net->ipv4.ipv4_hdr->ctl_table_arg; | |
791 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
792 | kfree(table); | |
1577519d PE |
793 | } |
794 | ||
795 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
796 | .init = ipv4_sysctl_init_net, | |
797 | .exit = ipv4_sysctl_exit_net, | |
798 | }; | |
799 | ||
3e37c3f9 PE |
800 | static __init int sysctl_ipv4_init(void) |
801 | { | |
802 | struct ctl_table_header *hdr; | |
e3826f1e AW |
803 | struct ctl_table *i; |
804 | ||
805 | for (i = ipv4_table; i->procname; i++) { | |
806 | if (strcmp(i->procname, "ip_local_reserved_ports") == 0) { | |
807 | i->data = sysctl_local_reserved_ports; | |
808 | break; | |
809 | } | |
810 | } | |
811 | if (!i->procname) | |
812 | return -EINVAL; | |
3e37c3f9 | 813 | |
3d7cc2ba | 814 | hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table); |
1577519d PE |
815 | if (hdr == NULL) |
816 | return -ENOMEM; | |
817 | ||
818 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
819 | unregister_sysctl_table(hdr); | |
820 | return -ENOMEM; | |
821 | } | |
822 | ||
823 | return 0; | |
3e37c3f9 PE |
824 | } |
825 | ||
826 | __initcall(sysctl_ipv4_init); |