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> |
1da177e4 | 15 | #include <net/snmp.h> |
20380731 | 16 | #include <net/icmp.h> |
1da177e4 LT |
17 | #include <net/ip.h> |
18 | #include <net/route.h> | |
19 | #include <net/tcp.h> | |
95766fff | 20 | #include <net/udp.h> |
446fda4f | 21 | #include <net/cipso_ipv4.h> |
04128f23 | 22 | #include <net/inet_frag.h> |
1da177e4 | 23 | |
89cee8b1 | 24 | static int zero; |
e905a9ed | 25 | static int tcp_retr1_max = 255; |
1da177e4 LT |
26 | static int ip_local_port_range_min[] = { 1, 1 }; |
27 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
1da177e4 | 28 | |
227b60f5 SH |
29 | /* Update system visible IP port range */ |
30 | static void set_local_port_range(int range[2]) | |
31 | { | |
3c689b73 ED |
32 | write_seqlock(&sysctl_local_ports.lock); |
33 | sysctl_local_ports.range[0] = range[0]; | |
34 | sysctl_local_ports.range[1] = range[1]; | |
35 | write_sequnlock(&sysctl_local_ports.lock); | |
227b60f5 SH |
36 | } |
37 | ||
38 | /* Validate changes from /proc interface. */ | |
8d65af78 | 39 | static int ipv4_local_port_range(ctl_table *table, int write, |
227b60f5 SH |
40 | void __user *buffer, |
41 | size_t *lenp, loff_t *ppos) | |
42 | { | |
43 | int ret; | |
3c689b73 | 44 | int range[2]; |
227b60f5 SH |
45 | ctl_table tmp = { |
46 | .data = &range, | |
47 | .maxlen = sizeof(range), | |
48 | .mode = table->mode, | |
49 | .extra1 = &ip_local_port_range_min, | |
50 | .extra2 = &ip_local_port_range_max, | |
51 | }; | |
52 | ||
3c689b73 | 53 | inet_get_local_port_range(range, range + 1); |
8d65af78 | 54 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
55 | |
56 | if (write && ret == 0) { | |
a25de534 | 57 | if (range[1] < range[0]) |
227b60f5 SH |
58 | ret = -EINVAL; |
59 | else | |
60 | set_local_port_range(range); | |
61 | } | |
62 | ||
63 | return ret; | |
64 | } | |
65 | ||
8d65af78 | 66 | static int proc_tcp_congestion_control(ctl_table *ctl, int write, |
317a76f9 SH |
67 | void __user *buffer, size_t *lenp, loff_t *ppos) |
68 | { | |
69 | char val[TCP_CA_NAME_MAX]; | |
70 | ctl_table tbl = { | |
71 | .data = val, | |
72 | .maxlen = TCP_CA_NAME_MAX, | |
73 | }; | |
74 | int ret; | |
75 | ||
76 | tcp_get_default_congestion_control(val); | |
77 | ||
8d65af78 | 78 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
79 | if (write && ret == 0) |
80 | ret = tcp_set_default_congestion_control(val); | |
81 | return ret; | |
82 | } | |
83 | ||
3ff825b2 | 84 | static int proc_tcp_available_congestion_control(ctl_table *ctl, |
8d65af78 | 85 | int write, |
3ff825b2 SH |
86 | void __user *buffer, size_t *lenp, |
87 | loff_t *ppos) | |
88 | { | |
89 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; | |
90 | int ret; | |
91 | ||
92 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
93 | if (!tbl.data) | |
94 | return -ENOMEM; | |
95 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 96 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
97 | kfree(tbl.data); |
98 | return ret; | |
99 | } | |
100 | ||
ce7bc3bf | 101 | static int proc_allowed_congestion_control(ctl_table *ctl, |
8d65af78 | 102 | int write, |
ce7bc3bf SH |
103 | void __user *buffer, size_t *lenp, |
104 | loff_t *ppos) | |
105 | { | |
106 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; | |
107 | int ret; | |
108 | ||
109 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
110 | if (!tbl.data) | |
111 | return -ENOMEM; | |
112 | ||
113 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 114 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
115 | if (write && ret == 0) |
116 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
117 | kfree(tbl.data); | |
118 | return ret; | |
119 | } | |
120 | ||
3e37c3f9 | 121 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 122 | { |
1da177e4 LT |
123 | .procname = "tcp_timestamps", |
124 | .data = &sysctl_tcp_timestamps, | |
125 | .maxlen = sizeof(int), | |
126 | .mode = 0644, | |
6d9f239a | 127 | .proc_handler = proc_dointvec |
1da177e4 | 128 | }, |
e905a9ed | 129 | { |
1da177e4 LT |
130 | .procname = "tcp_window_scaling", |
131 | .data = &sysctl_tcp_window_scaling, | |
132 | .maxlen = sizeof(int), | |
133 | .mode = 0644, | |
6d9f239a | 134 | .proc_handler = proc_dointvec |
1da177e4 | 135 | }, |
e905a9ed | 136 | { |
1da177e4 LT |
137 | .procname = "tcp_sack", |
138 | .data = &sysctl_tcp_sack, | |
139 | .maxlen = sizeof(int), | |
140 | .mode = 0644, | |
6d9f239a | 141 | .proc_handler = proc_dointvec |
1da177e4 | 142 | }, |
e905a9ed | 143 | { |
1da177e4 LT |
144 | .procname = "tcp_retrans_collapse", |
145 | .data = &sysctl_tcp_retrans_collapse, | |
146 | .maxlen = sizeof(int), | |
147 | .mode = 0644, | |
6d9f239a | 148 | .proc_handler = proc_dointvec |
1da177e4 | 149 | }, |
e905a9ed | 150 | { |
1da177e4 | 151 | .procname = "ip_default_ttl", |
e905a9ed | 152 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
153 | .maxlen = sizeof(int), |
154 | .mode = 0644, | |
6d9f239a | 155 | .proc_handler = ipv4_doint_and_flush, |
adf044c8 | 156 | .extra2 = &init_net, |
1da177e4 | 157 | }, |
e905a9ed | 158 | { |
1da177e4 LT |
159 | .procname = "ip_no_pmtu_disc", |
160 | .data = &ipv4_config.no_pmtu_disc, | |
161 | .maxlen = sizeof(int), | |
162 | .mode = 0644, | |
6d9f239a | 163 | .proc_handler = proc_dointvec |
1da177e4 LT |
164 | }, |
165 | { | |
1da177e4 LT |
166 | .procname = "ip_nonlocal_bind", |
167 | .data = &sysctl_ip_nonlocal_bind, | |
168 | .maxlen = sizeof(int), | |
169 | .mode = 0644, | |
6d9f239a | 170 | .proc_handler = proc_dointvec |
1da177e4 LT |
171 | }, |
172 | { | |
1da177e4 LT |
173 | .procname = "tcp_syn_retries", |
174 | .data = &sysctl_tcp_syn_retries, | |
175 | .maxlen = sizeof(int), | |
176 | .mode = 0644, | |
6d9f239a | 177 | .proc_handler = proc_dointvec |
1da177e4 LT |
178 | }, |
179 | { | |
1da177e4 LT |
180 | .procname = "tcp_synack_retries", |
181 | .data = &sysctl_tcp_synack_retries, | |
182 | .maxlen = sizeof(int), | |
183 | .mode = 0644, | |
6d9f239a | 184 | .proc_handler = proc_dointvec |
1da177e4 LT |
185 | }, |
186 | { | |
1da177e4 LT |
187 | .procname = "tcp_max_orphans", |
188 | .data = &sysctl_tcp_max_orphans, | |
189 | .maxlen = sizeof(int), | |
190 | .mode = 0644, | |
6d9f239a | 191 | .proc_handler = proc_dointvec |
1da177e4 LT |
192 | }, |
193 | { | |
1da177e4 | 194 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 195 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
196 | .maxlen = sizeof(int), |
197 | .mode = 0644, | |
6d9f239a | 198 | .proc_handler = proc_dointvec |
1da177e4 | 199 | }, |
1da177e4 | 200 | { |
1da177e4 LT |
201 | .procname = "ip_dynaddr", |
202 | .data = &sysctl_ip_dynaddr, | |
203 | .maxlen = sizeof(int), | |
204 | .mode = 0644, | |
6d9f239a | 205 | .proc_handler = proc_dointvec |
1da177e4 | 206 | }, |
1da177e4 | 207 | { |
1da177e4 LT |
208 | .procname = "tcp_keepalive_time", |
209 | .data = &sysctl_tcp_keepalive_time, | |
210 | .maxlen = sizeof(int), | |
211 | .mode = 0644, | |
6d9f239a | 212 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
213 | }, |
214 | { | |
1da177e4 LT |
215 | .procname = "tcp_keepalive_probes", |
216 | .data = &sysctl_tcp_keepalive_probes, | |
217 | .maxlen = sizeof(int), | |
218 | .mode = 0644, | |
6d9f239a | 219 | .proc_handler = proc_dointvec |
1da177e4 LT |
220 | }, |
221 | { | |
1da177e4 LT |
222 | .procname = "tcp_keepalive_intvl", |
223 | .data = &sysctl_tcp_keepalive_intvl, | |
224 | .maxlen = sizeof(int), | |
225 | .mode = 0644, | |
6d9f239a | 226 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
227 | }, |
228 | { | |
1da177e4 LT |
229 | .procname = "tcp_retries1", |
230 | .data = &sysctl_tcp_retries1, | |
231 | .maxlen = sizeof(int), | |
232 | .mode = 0644, | |
6d9f239a | 233 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
234 | .extra2 = &tcp_retr1_max |
235 | }, | |
236 | { | |
1da177e4 LT |
237 | .procname = "tcp_retries2", |
238 | .data = &sysctl_tcp_retries2, | |
239 | .maxlen = sizeof(int), | |
240 | .mode = 0644, | |
6d9f239a | 241 | .proc_handler = proc_dointvec |
1da177e4 LT |
242 | }, |
243 | { | |
1da177e4 LT |
244 | .procname = "tcp_fin_timeout", |
245 | .data = &sysctl_tcp_fin_timeout, | |
246 | .maxlen = sizeof(int), | |
247 | .mode = 0644, | |
6d9f239a | 248 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
249 | }, |
250 | #ifdef CONFIG_SYN_COOKIES | |
251 | { | |
1da177e4 LT |
252 | .procname = "tcp_syncookies", |
253 | .data = &sysctl_tcp_syncookies, | |
254 | .maxlen = sizeof(int), | |
255 | .mode = 0644, | |
6d9f239a | 256 | .proc_handler = proc_dointvec |
1da177e4 LT |
257 | }, |
258 | #endif | |
259 | { | |
1da177e4 | 260 | .procname = "tcp_tw_recycle", |
295ff7ed | 261 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
262 | .maxlen = sizeof(int), |
263 | .mode = 0644, | |
6d9f239a | 264 | .proc_handler = proc_dointvec |
1da177e4 LT |
265 | }, |
266 | { | |
1da177e4 LT |
267 | .procname = "tcp_abort_on_overflow", |
268 | .data = &sysctl_tcp_abort_on_overflow, | |
269 | .maxlen = sizeof(int), | |
270 | .mode = 0644, | |
6d9f239a | 271 | .proc_handler = proc_dointvec |
1da177e4 LT |
272 | }, |
273 | { | |
1da177e4 LT |
274 | .procname = "tcp_stdurg", |
275 | .data = &sysctl_tcp_stdurg, | |
276 | .maxlen = sizeof(int), | |
277 | .mode = 0644, | |
6d9f239a | 278 | .proc_handler = proc_dointvec |
1da177e4 LT |
279 | }, |
280 | { | |
1da177e4 LT |
281 | .procname = "tcp_rfc1337", |
282 | .data = &sysctl_tcp_rfc1337, | |
283 | .maxlen = sizeof(int), | |
284 | .mode = 0644, | |
6d9f239a | 285 | .proc_handler = proc_dointvec |
1da177e4 LT |
286 | }, |
287 | { | |
1da177e4 LT |
288 | .procname = "tcp_max_syn_backlog", |
289 | .data = &sysctl_max_syn_backlog, | |
290 | .maxlen = sizeof(int), | |
291 | .mode = 0644, | |
6d9f239a | 292 | .proc_handler = proc_dointvec |
1da177e4 LT |
293 | }, |
294 | { | |
1da177e4 | 295 | .procname = "ip_local_port_range", |
3c689b73 ED |
296 | .data = &sysctl_local_ports.range, |
297 | .maxlen = sizeof(sysctl_local_ports.range), | |
1da177e4 | 298 | .mode = 0644, |
6d9f239a | 299 | .proc_handler = ipv4_local_port_range, |
1da177e4 | 300 | }, |
1da177e4 LT |
301 | #ifdef CONFIG_IP_MULTICAST |
302 | { | |
1da177e4 LT |
303 | .procname = "igmp_max_memberships", |
304 | .data = &sysctl_igmp_max_memberships, | |
305 | .maxlen = sizeof(int), | |
306 | .mode = 0644, | |
6d9f239a | 307 | .proc_handler = proc_dointvec |
1da177e4 LT |
308 | }, |
309 | ||
310 | #endif | |
311 | { | |
1da177e4 LT |
312 | .procname = "igmp_max_msf", |
313 | .data = &sysctl_igmp_max_msf, | |
314 | .maxlen = sizeof(int), | |
315 | .mode = 0644, | |
6d9f239a | 316 | .proc_handler = proc_dointvec |
1da177e4 LT |
317 | }, |
318 | { | |
1da177e4 LT |
319 | .procname = "inet_peer_threshold", |
320 | .data = &inet_peer_threshold, | |
321 | .maxlen = sizeof(int), | |
322 | .mode = 0644, | |
6d9f239a | 323 | .proc_handler = proc_dointvec |
1da177e4 LT |
324 | }, |
325 | { | |
1da177e4 LT |
326 | .procname = "inet_peer_minttl", |
327 | .data = &inet_peer_minttl, | |
328 | .maxlen = sizeof(int), | |
329 | .mode = 0644, | |
6d9f239a | 330 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
331 | }, |
332 | { | |
1da177e4 LT |
333 | .procname = "inet_peer_maxttl", |
334 | .data = &inet_peer_maxttl, | |
335 | .maxlen = sizeof(int), | |
336 | .mode = 0644, | |
6d9f239a | 337 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
338 | }, |
339 | { | |
1da177e4 LT |
340 | .procname = "inet_peer_gc_mintime", |
341 | .data = &inet_peer_gc_mintime, | |
342 | .maxlen = sizeof(int), | |
343 | .mode = 0644, | |
6d9f239a | 344 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
345 | }, |
346 | { | |
1da177e4 LT |
347 | .procname = "inet_peer_gc_maxtime", |
348 | .data = &inet_peer_gc_maxtime, | |
349 | .maxlen = sizeof(int), | |
350 | .mode = 0644, | |
6d9f239a | 351 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
352 | }, |
353 | { | |
1da177e4 LT |
354 | .procname = "tcp_orphan_retries", |
355 | .data = &sysctl_tcp_orphan_retries, | |
356 | .maxlen = sizeof(int), | |
357 | .mode = 0644, | |
6d9f239a | 358 | .proc_handler = proc_dointvec |
1da177e4 LT |
359 | }, |
360 | { | |
1da177e4 LT |
361 | .procname = "tcp_fack", |
362 | .data = &sysctl_tcp_fack, | |
363 | .maxlen = sizeof(int), | |
364 | .mode = 0644, | |
6d9f239a | 365 | .proc_handler = proc_dointvec |
1da177e4 LT |
366 | }, |
367 | { | |
1da177e4 LT |
368 | .procname = "tcp_reordering", |
369 | .data = &sysctl_tcp_reordering, | |
370 | .maxlen = sizeof(int), | |
371 | .mode = 0644, | |
6d9f239a | 372 | .proc_handler = proc_dointvec |
1da177e4 LT |
373 | }, |
374 | { | |
1da177e4 LT |
375 | .procname = "tcp_ecn", |
376 | .data = &sysctl_tcp_ecn, | |
377 | .maxlen = sizeof(int), | |
378 | .mode = 0644, | |
6d9f239a | 379 | .proc_handler = proc_dointvec |
1da177e4 LT |
380 | }, |
381 | { | |
1da177e4 LT |
382 | .procname = "tcp_dsack", |
383 | .data = &sysctl_tcp_dsack, | |
384 | .maxlen = sizeof(int), | |
385 | .mode = 0644, | |
6d9f239a | 386 | .proc_handler = proc_dointvec |
1da177e4 LT |
387 | }, |
388 | { | |
1da177e4 LT |
389 | .procname = "tcp_mem", |
390 | .data = &sysctl_tcp_mem, | |
391 | .maxlen = sizeof(sysctl_tcp_mem), | |
392 | .mode = 0644, | |
6d9f239a | 393 | .proc_handler = proc_dointvec |
1da177e4 LT |
394 | }, |
395 | { | |
1da177e4 LT |
396 | .procname = "tcp_wmem", |
397 | .data = &sysctl_tcp_wmem, | |
398 | .maxlen = sizeof(sysctl_tcp_wmem), | |
399 | .mode = 0644, | |
6d9f239a | 400 | .proc_handler = proc_dointvec |
1da177e4 LT |
401 | }, |
402 | { | |
1da177e4 LT |
403 | .procname = "tcp_rmem", |
404 | .data = &sysctl_tcp_rmem, | |
405 | .maxlen = sizeof(sysctl_tcp_rmem), | |
406 | .mode = 0644, | |
6d9f239a | 407 | .proc_handler = proc_dointvec |
1da177e4 LT |
408 | }, |
409 | { | |
1da177e4 LT |
410 | .procname = "tcp_app_win", |
411 | .data = &sysctl_tcp_app_win, | |
412 | .maxlen = sizeof(int), | |
413 | .mode = 0644, | |
6d9f239a | 414 | .proc_handler = proc_dointvec |
1da177e4 LT |
415 | }, |
416 | { | |
1da177e4 LT |
417 | .procname = "tcp_adv_win_scale", |
418 | .data = &sysctl_tcp_adv_win_scale, | |
419 | .maxlen = sizeof(int), | |
420 | .mode = 0644, | |
6d9f239a | 421 | .proc_handler = proc_dointvec |
1da177e4 | 422 | }, |
1da177e4 | 423 | { |
1da177e4 LT |
424 | .procname = "tcp_tw_reuse", |
425 | .data = &sysctl_tcp_tw_reuse, | |
426 | .maxlen = sizeof(int), | |
427 | .mode = 0644, | |
6d9f239a | 428 | .proc_handler = proc_dointvec |
1da177e4 LT |
429 | }, |
430 | { | |
1da177e4 LT |
431 | .procname = "tcp_frto", |
432 | .data = &sysctl_tcp_frto, | |
433 | .maxlen = sizeof(int), | |
434 | .mode = 0644, | |
6d9f239a | 435 | .proc_handler = proc_dointvec |
1da177e4 | 436 | }, |
3cfe3baa | 437 | { |
3cfe3baa IJ |
438 | .procname = "tcp_frto_response", |
439 | .data = &sysctl_tcp_frto_response, | |
440 | .maxlen = sizeof(int), | |
441 | .mode = 0644, | |
6d9f239a | 442 | .proc_handler = proc_dointvec |
3cfe3baa | 443 | }, |
1da177e4 | 444 | { |
1da177e4 LT |
445 | .procname = "tcp_low_latency", |
446 | .data = &sysctl_tcp_low_latency, | |
447 | .maxlen = sizeof(int), | |
448 | .mode = 0644, | |
6d9f239a | 449 | .proc_handler = proc_dointvec |
1da177e4 | 450 | }, |
1da177e4 | 451 | { |
1da177e4 LT |
452 | .procname = "tcp_no_metrics_save", |
453 | .data = &sysctl_tcp_nometrics_save, | |
454 | .maxlen = sizeof(int), | |
455 | .mode = 0644, | |
6d9f239a | 456 | .proc_handler = proc_dointvec, |
1da177e4 | 457 | }, |
1da177e4 | 458 | { |
1da177e4 LT |
459 | .procname = "tcp_moderate_rcvbuf", |
460 | .data = &sysctl_tcp_moderate_rcvbuf, | |
461 | .maxlen = sizeof(int), | |
462 | .mode = 0644, | |
6d9f239a | 463 | .proc_handler = proc_dointvec, |
1da177e4 LT |
464 | }, |
465 | { | |
1da177e4 LT |
466 | .procname = "tcp_tso_win_divisor", |
467 | .data = &sysctl_tcp_tso_win_divisor, | |
468 | .maxlen = sizeof(int), | |
469 | .mode = 0644, | |
6d9f239a | 470 | .proc_handler = proc_dointvec, |
1da177e4 LT |
471 | }, |
472 | { | |
317a76f9 | 473 | .procname = "tcp_congestion_control", |
1da177e4 | 474 | .mode = 0644, |
317a76f9 | 475 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 476 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 477 | }, |
9772efb9 | 478 | { |
9772efb9 SH |
479 | .procname = "tcp_abc", |
480 | .data = &sysctl_tcp_abc, | |
481 | .maxlen = sizeof(int), | |
482 | .mode = 0644, | |
6d9f239a | 483 | .proc_handler = proc_dointvec, |
9772efb9 | 484 | }, |
5d424d5a | 485 | { |
5d424d5a JH |
486 | .procname = "tcp_mtu_probing", |
487 | .data = &sysctl_tcp_mtu_probing, | |
488 | .maxlen = sizeof(int), | |
489 | .mode = 0644, | |
6d9f239a | 490 | .proc_handler = proc_dointvec, |
5d424d5a JH |
491 | }, |
492 | { | |
5d424d5a JH |
493 | .procname = "tcp_base_mss", |
494 | .data = &sysctl_tcp_base_mss, | |
495 | .maxlen = sizeof(int), | |
496 | .mode = 0644, | |
6d9f239a | 497 | .proc_handler = proc_dointvec, |
5d424d5a | 498 | }, |
e905a9ed | 499 | { |
15d99e02 RJ |
500 | .procname = "tcp_workaround_signed_windows", |
501 | .data = &sysctl_tcp_workaround_signed_windows, | |
502 | .maxlen = sizeof(int), | |
503 | .mode = 0644, | |
6d9f239a | 504 | .proc_handler = proc_dointvec |
15d99e02 | 505 | }, |
95937825 CL |
506 | #ifdef CONFIG_NET_DMA |
507 | { | |
95937825 CL |
508 | .procname = "tcp_dma_copybreak", |
509 | .data = &sysctl_tcp_dma_copybreak, | |
510 | .maxlen = sizeof(int), | |
511 | .mode = 0644, | |
6d9f239a | 512 | .proc_handler = proc_dointvec |
95937825 CL |
513 | }, |
514 | #endif | |
35089bb2 | 515 | { |
35089bb2 DM |
516 | .procname = "tcp_slow_start_after_idle", |
517 | .data = &sysctl_tcp_slow_start_after_idle, | |
518 | .maxlen = sizeof(int), | |
519 | .mode = 0644, | |
6d9f239a | 520 | .proc_handler = proc_dointvec |
35089bb2 | 521 | }, |
446fda4f PM |
522 | #ifdef CONFIG_NETLABEL |
523 | { | |
446fda4f PM |
524 | .procname = "cipso_cache_enable", |
525 | .data = &cipso_v4_cache_enabled, | |
526 | .maxlen = sizeof(int), | |
527 | .mode = 0644, | |
6d9f239a | 528 | .proc_handler = proc_dointvec, |
446fda4f PM |
529 | }, |
530 | { | |
446fda4f PM |
531 | .procname = "cipso_cache_bucket_size", |
532 | .data = &cipso_v4_cache_bucketsize, | |
533 | .maxlen = sizeof(int), | |
534 | .mode = 0644, | |
6d9f239a | 535 | .proc_handler = proc_dointvec, |
446fda4f PM |
536 | }, |
537 | { | |
446fda4f PM |
538 | .procname = "cipso_rbm_optfmt", |
539 | .data = &cipso_v4_rbm_optfmt, | |
540 | .maxlen = sizeof(int), | |
541 | .mode = 0644, | |
6d9f239a | 542 | .proc_handler = proc_dointvec, |
446fda4f PM |
543 | }, |
544 | { | |
446fda4f PM |
545 | .procname = "cipso_rbm_strictvalid", |
546 | .data = &cipso_v4_rbm_strictvalid, | |
547 | .maxlen = sizeof(int), | |
548 | .mode = 0644, | |
6d9f239a | 549 | .proc_handler = proc_dointvec, |
446fda4f PM |
550 | }, |
551 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 552 | { |
3ff825b2 SH |
553 | .procname = "tcp_available_congestion_control", |
554 | .maxlen = TCP_CA_BUF_MAX, | |
555 | .mode = 0444, | |
6d9f239a | 556 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 557 | }, |
ce7bc3bf | 558 | { |
ce7bc3bf SH |
559 | .procname = "tcp_allowed_congestion_control", |
560 | .maxlen = TCP_CA_BUF_MAX, | |
561 | .mode = 0644, | |
6d9f239a | 562 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 563 | }, |
886236c1 | 564 | { |
886236c1 JH |
565 | .procname = "tcp_max_ssthresh", |
566 | .data = &sysctl_tcp_max_ssthresh, | |
567 | .maxlen = sizeof(int), | |
568 | .mode = 0644, | |
6d9f239a | 569 | .proc_handler = proc_dointvec, |
886236c1 | 570 | }, |
95766fff | 571 | { |
95766fff HA |
572 | .procname = "udp_mem", |
573 | .data = &sysctl_udp_mem, | |
574 | .maxlen = sizeof(sysctl_udp_mem), | |
575 | .mode = 0644, | |
6d9f239a | 576 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
577 | .extra1 = &zero |
578 | }, | |
579 | { | |
95766fff HA |
580 | .procname = "udp_rmem_min", |
581 | .data = &sysctl_udp_rmem_min, | |
582 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
583 | .mode = 0644, | |
6d9f239a | 584 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
585 | .extra1 = &zero |
586 | }, | |
587 | { | |
95766fff HA |
588 | .procname = "udp_wmem_min", |
589 | .data = &sysctl_udp_wmem_min, | |
590 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
591 | .mode = 0644, | |
6d9f239a | 592 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
593 | .extra1 = &zero |
594 | }, | |
f8572d8f | 595 | { } |
1da177e4 | 596 | }; |
3e37c3f9 | 597 | |
68528f09 PE |
598 | static struct ctl_table ipv4_net_table[] = { |
599 | { | |
68528f09 PE |
600 | .procname = "icmp_echo_ignore_all", |
601 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
602 | .maxlen = sizeof(int), | |
603 | .mode = 0644, | |
6d9f239a | 604 | .proc_handler = proc_dointvec |
68528f09 PE |
605 | }, |
606 | { | |
68528f09 PE |
607 | .procname = "icmp_echo_ignore_broadcasts", |
608 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
609 | .maxlen = sizeof(int), | |
610 | .mode = 0644, | |
6d9f239a | 611 | .proc_handler = proc_dointvec |
68528f09 PE |
612 | }, |
613 | { | |
68528f09 PE |
614 | .procname = "icmp_ignore_bogus_error_responses", |
615 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
616 | .maxlen = sizeof(int), | |
617 | .mode = 0644, | |
6d9f239a | 618 | .proc_handler = proc_dointvec |
68528f09 PE |
619 | }, |
620 | { | |
68528f09 PE |
621 | .procname = "icmp_errors_use_inbound_ifaddr", |
622 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
623 | .maxlen = sizeof(int), | |
624 | .mode = 0644, | |
6d9f239a | 625 | .proc_handler = proc_dointvec |
68528f09 PE |
626 | }, |
627 | { | |
68528f09 PE |
628 | .procname = "icmp_ratelimit", |
629 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
6d9f239a | 632 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
633 | }, |
634 | { | |
68528f09 PE |
635 | .procname = "icmp_ratemask", |
636 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
637 | .maxlen = sizeof(int), | |
638 | .mode = 0644, | |
6d9f239a | 639 | .proc_handler = proc_dointvec |
68528f09 | 640 | }, |
1080d709 | 641 | { |
1080d709 NH |
642 | .procname = "rt_cache_rebuild_count", |
643 | .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, | |
644 | .maxlen = sizeof(int), | |
645 | .mode = 0644, | |
6d9f239a | 646 | .proc_handler = proc_dointvec |
1080d709 | 647 | }, |
68528f09 PE |
648 | { } |
649 | }; | |
650 | ||
3d7cc2ba | 651 | struct ctl_path net_ipv4_ctl_path[] = { |
f8572d8f EB |
652 | { .procname = "net", }, |
653 | { .procname = "ipv4", }, | |
3e37c3f9 PE |
654 | { }, |
655 | }; | |
3d7cc2ba | 656 | EXPORT_SYMBOL_GPL(net_ipv4_ctl_path); |
3e37c3f9 | 657 | |
1577519d PE |
658 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
659 | { | |
68528f09 PE |
660 | struct ctl_table *table; |
661 | ||
662 | table = ipv4_net_table; | |
663 | if (net != &init_net) { | |
664 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); | |
665 | if (table == NULL) | |
666 | goto err_alloc; | |
667 | ||
668 | table[0].data = | |
669 | &net->ipv4.sysctl_icmp_echo_ignore_all; | |
670 | table[1].data = | |
671 | &net->ipv4.sysctl_icmp_echo_ignore_broadcasts; | |
672 | table[2].data = | |
673 | &net->ipv4.sysctl_icmp_ignore_bogus_error_responses; | |
674 | table[3].data = | |
675 | &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr; | |
676 | table[4].data = | |
677 | &net->ipv4.sysctl_icmp_ratelimit; | |
678 | table[5].data = | |
679 | &net->ipv4.sysctl_icmp_ratemask; | |
1080d709 NH |
680 | table[6].data = |
681 | &net->ipv4.sysctl_rt_cache_rebuild_count; | |
68528f09 PE |
682 | } |
683 | ||
1080d709 NH |
684 | net->ipv4.sysctl_rt_cache_rebuild_count = 4; |
685 | ||
68528f09 PE |
686 | net->ipv4.ipv4_hdr = register_net_sysctl_table(net, |
687 | net_ipv4_ctl_path, table); | |
688 | if (net->ipv4.ipv4_hdr == NULL) | |
689 | goto err_reg; | |
690 | ||
1577519d | 691 | return 0; |
68528f09 PE |
692 | |
693 | err_reg: | |
694 | if (net != &init_net) | |
695 | kfree(table); | |
696 | err_alloc: | |
697 | return -ENOMEM; | |
1577519d PE |
698 | } |
699 | ||
700 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
701 | { | |
68528f09 PE |
702 | struct ctl_table *table; |
703 | ||
704 | table = net->ipv4.ipv4_hdr->ctl_table_arg; | |
705 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
706 | kfree(table); | |
1577519d PE |
707 | } |
708 | ||
709 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
710 | .init = ipv4_sysctl_init_net, | |
711 | .exit = ipv4_sysctl_exit_net, | |
712 | }; | |
713 | ||
3e37c3f9 PE |
714 | static __init int sysctl_ipv4_init(void) |
715 | { | |
716 | struct ctl_table_header *hdr; | |
717 | ||
3d7cc2ba | 718 | hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table); |
1577519d PE |
719 | if (hdr == NULL) |
720 | return -ENOMEM; | |
721 | ||
722 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
723 | unregister_sysctl_table(hdr); | |
724 | return -ENOMEM; | |
725 | } | |
726 | ||
727 | return 0; | |
3e37c3f9 PE |
728 | } |
729 | ||
730 | __initcall(sysctl_ipv4_init); |