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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> |
1da177e4 | 27 | |
89cee8b1 | 28 | static int zero; |
e905a9ed | 29 | static int tcp_retr1_max = 255; |
1da177e4 LT |
30 | static int ip_local_port_range_min[] = { 1, 1 }; |
31 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
32 | static int tcp_adv_win_scale_min = -31; |
33 | static int tcp_adv_win_scale_max = 31; | |
249fab77 ED |
34 | static int ip_ttl_min = 1; |
35 | static int ip_ttl_max = 255; | |
c319b4d7 VK |
36 | static int ip_ping_group_range_min[] = { 0, 0 }; |
37 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 38 | |
227b60f5 SH |
39 | /* Update system visible IP port range */ |
40 | static void set_local_port_range(int range[2]) | |
41 | { | |
3c689b73 ED |
42 | write_seqlock(&sysctl_local_ports.lock); |
43 | sysctl_local_ports.range[0] = range[0]; | |
44 | sysctl_local_ports.range[1] = range[1]; | |
45 | write_sequnlock(&sysctl_local_ports.lock); | |
227b60f5 SH |
46 | } |
47 | ||
48 | /* Validate changes from /proc interface. */ | |
8d65af78 | 49 | static int ipv4_local_port_range(ctl_table *table, int write, |
227b60f5 SH |
50 | void __user *buffer, |
51 | size_t *lenp, loff_t *ppos) | |
52 | { | |
53 | int ret; | |
3c689b73 | 54 | int range[2]; |
227b60f5 SH |
55 | ctl_table tmp = { |
56 | .data = &range, | |
57 | .maxlen = sizeof(range), | |
58 | .mode = table->mode, | |
59 | .extra1 = &ip_local_port_range_min, | |
60 | .extra2 = &ip_local_port_range_max, | |
61 | }; | |
62 | ||
3c689b73 | 63 | inet_get_local_port_range(range, range + 1); |
8d65af78 | 64 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
65 | |
66 | if (write && ret == 0) { | |
a25de534 | 67 | if (range[1] < range[0]) |
227b60f5 SH |
68 | ret = -EINVAL; |
69 | else | |
70 | set_local_port_range(range); | |
71 | } | |
72 | ||
73 | return ret; | |
74 | } | |
75 | ||
c319b4d7 | 76 | |
c319b4d7 VK |
77 | void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high) |
78 | { | |
79 | gid_t *data = table->data; | |
80 | unsigned seq; | |
81 | do { | |
82 | seq = read_seqbegin(&sysctl_local_ports.lock); | |
83 | ||
84 | *low = data[0]; | |
85 | *high = data[1]; | |
86 | } while (read_seqretry(&sysctl_local_ports.lock, seq)); | |
87 | } | |
88 | ||
89 | /* Update system visible IP port range */ | |
90 | static void set_ping_group_range(struct ctl_table *table, int range[2]) | |
91 | { | |
92 | gid_t *data = table->data; | |
93 | write_seqlock(&sysctl_local_ports.lock); | |
94 | data[0] = range[0]; | |
95 | data[1] = range[1]; | |
96 | write_sequnlock(&sysctl_local_ports.lock); | |
97 | } | |
98 | ||
99 | /* Validate changes from /proc interface. */ | |
100 | static int ipv4_ping_group_range(ctl_table *table, int write, | |
101 | void __user *buffer, | |
102 | size_t *lenp, loff_t *ppos) | |
103 | { | |
104 | int ret; | |
105 | gid_t range[2]; | |
106 | ctl_table tmp = { | |
107 | .data = &range, | |
108 | .maxlen = sizeof(range), | |
109 | .mode = table->mode, | |
110 | .extra1 = &ip_ping_group_range_min, | |
111 | .extra2 = &ip_ping_group_range_max, | |
112 | }; | |
113 | ||
114 | inet_get_ping_group_range_table(table, range, range + 1); | |
115 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
116 | ||
117 | if (write && ret == 0) | |
118 | set_ping_group_range(table, range); | |
119 | ||
120 | return ret; | |
121 | } | |
122 | ||
8d65af78 | 123 | static int proc_tcp_congestion_control(ctl_table *ctl, int write, |
317a76f9 SH |
124 | void __user *buffer, size_t *lenp, loff_t *ppos) |
125 | { | |
126 | char val[TCP_CA_NAME_MAX]; | |
127 | ctl_table tbl = { | |
128 | .data = val, | |
129 | .maxlen = TCP_CA_NAME_MAX, | |
130 | }; | |
131 | int ret; | |
132 | ||
133 | tcp_get_default_congestion_control(val); | |
134 | ||
8d65af78 | 135 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
136 | if (write && ret == 0) |
137 | ret = tcp_set_default_congestion_control(val); | |
138 | return ret; | |
139 | } | |
140 | ||
3ff825b2 | 141 | static int proc_tcp_available_congestion_control(ctl_table *ctl, |
8d65af78 | 142 | int write, |
3ff825b2 SH |
143 | void __user *buffer, size_t *lenp, |
144 | loff_t *ppos) | |
145 | { | |
146 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; | |
147 | int ret; | |
148 | ||
149 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
150 | if (!tbl.data) | |
151 | return -ENOMEM; | |
152 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 153 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
154 | kfree(tbl.data); |
155 | return ret; | |
156 | } | |
157 | ||
ce7bc3bf | 158 | static int proc_allowed_congestion_control(ctl_table *ctl, |
8d65af78 | 159 | int write, |
ce7bc3bf SH |
160 | void __user *buffer, size_t *lenp, |
161 | loff_t *ppos) | |
162 | { | |
163 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; | |
164 | int ret; | |
165 | ||
166 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
167 | if (!tbl.data) | |
168 | return -ENOMEM; | |
169 | ||
170 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 171 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
172 | if (write && ret == 0) |
173 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
174 | kfree(tbl.data); | |
175 | return ret; | |
176 | } | |
177 | ||
3dc43e3e GC |
178 | static int ipv4_tcp_mem(ctl_table *ctl, int write, |
179 | void __user *buffer, size_t *lenp, | |
180 | loff_t *ppos) | |
181 | { | |
182 | int ret; | |
183 | unsigned long vec[3]; | |
184 | struct net *net = current->nsproxy->net_ns; | |
185 | ||
186 | ctl_table tmp = { | |
187 | .data = &vec, | |
188 | .maxlen = sizeof(vec), | |
189 | .mode = ctl->mode, | |
190 | }; | |
191 | ||
192 | if (!write) { | |
193 | ctl->data = &net->ipv4.sysctl_tcp_mem; | |
194 | return proc_doulongvec_minmax(ctl, write, buffer, lenp, ppos); | |
195 | } | |
196 | ||
197 | ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos); | |
198 | if (ret) | |
199 | return ret; | |
200 | ||
201 | net->ipv4.sysctl_tcp_mem[0] = vec[0]; | |
202 | net->ipv4.sysctl_tcp_mem[1] = vec[1]; | |
203 | net->ipv4.sysctl_tcp_mem[2] = vec[2]; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
3e37c3f9 | 208 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 209 | { |
1da177e4 LT |
210 | .procname = "tcp_timestamps", |
211 | .data = &sysctl_tcp_timestamps, | |
212 | .maxlen = sizeof(int), | |
213 | .mode = 0644, | |
6d9f239a | 214 | .proc_handler = proc_dointvec |
1da177e4 | 215 | }, |
e905a9ed | 216 | { |
1da177e4 LT |
217 | .procname = "tcp_window_scaling", |
218 | .data = &sysctl_tcp_window_scaling, | |
219 | .maxlen = sizeof(int), | |
220 | .mode = 0644, | |
6d9f239a | 221 | .proc_handler = proc_dointvec |
1da177e4 | 222 | }, |
e905a9ed | 223 | { |
1da177e4 LT |
224 | .procname = "tcp_sack", |
225 | .data = &sysctl_tcp_sack, | |
226 | .maxlen = sizeof(int), | |
227 | .mode = 0644, | |
6d9f239a | 228 | .proc_handler = proc_dointvec |
1da177e4 | 229 | }, |
e905a9ed | 230 | { |
1da177e4 LT |
231 | .procname = "tcp_retrans_collapse", |
232 | .data = &sysctl_tcp_retrans_collapse, | |
233 | .maxlen = sizeof(int), | |
234 | .mode = 0644, | |
6d9f239a | 235 | .proc_handler = proc_dointvec |
1da177e4 | 236 | }, |
e905a9ed | 237 | { |
1da177e4 | 238 | .procname = "ip_default_ttl", |
e905a9ed | 239 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
240 | .maxlen = sizeof(int), |
241 | .mode = 0644, | |
249fab77 ED |
242 | .proc_handler = proc_dointvec_minmax, |
243 | .extra1 = &ip_ttl_min, | |
244 | .extra2 = &ip_ttl_max, | |
1da177e4 | 245 | }, |
e905a9ed | 246 | { |
1da177e4 LT |
247 | .procname = "ip_no_pmtu_disc", |
248 | .data = &ipv4_config.no_pmtu_disc, | |
249 | .maxlen = sizeof(int), | |
250 | .mode = 0644, | |
6d9f239a | 251 | .proc_handler = proc_dointvec |
1da177e4 LT |
252 | }, |
253 | { | |
1da177e4 LT |
254 | .procname = "ip_nonlocal_bind", |
255 | .data = &sysctl_ip_nonlocal_bind, | |
256 | .maxlen = sizeof(int), | |
257 | .mode = 0644, | |
6d9f239a | 258 | .proc_handler = proc_dointvec |
1da177e4 LT |
259 | }, |
260 | { | |
1da177e4 LT |
261 | .procname = "tcp_syn_retries", |
262 | .data = &sysctl_tcp_syn_retries, | |
263 | .maxlen = sizeof(int), | |
264 | .mode = 0644, | |
6d9f239a | 265 | .proc_handler = proc_dointvec |
1da177e4 LT |
266 | }, |
267 | { | |
1da177e4 LT |
268 | .procname = "tcp_synack_retries", |
269 | .data = &sysctl_tcp_synack_retries, | |
270 | .maxlen = sizeof(int), | |
271 | .mode = 0644, | |
6d9f239a | 272 | .proc_handler = proc_dointvec |
1da177e4 LT |
273 | }, |
274 | { | |
1da177e4 LT |
275 | .procname = "tcp_max_orphans", |
276 | .data = &sysctl_tcp_max_orphans, | |
277 | .maxlen = sizeof(int), | |
278 | .mode = 0644, | |
6d9f239a | 279 | .proc_handler = proc_dointvec |
1da177e4 LT |
280 | }, |
281 | { | |
1da177e4 | 282 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 283 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
284 | .maxlen = sizeof(int), |
285 | .mode = 0644, | |
6d9f239a | 286 | .proc_handler = proc_dointvec |
1da177e4 | 287 | }, |
1da177e4 | 288 | { |
1da177e4 LT |
289 | .procname = "ip_dynaddr", |
290 | .data = &sysctl_ip_dynaddr, | |
291 | .maxlen = sizeof(int), | |
292 | .mode = 0644, | |
6d9f239a | 293 | .proc_handler = proc_dointvec |
1da177e4 | 294 | }, |
1da177e4 | 295 | { |
1da177e4 LT |
296 | .procname = "tcp_keepalive_time", |
297 | .data = &sysctl_tcp_keepalive_time, | |
298 | .maxlen = sizeof(int), | |
299 | .mode = 0644, | |
6d9f239a | 300 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
301 | }, |
302 | { | |
1da177e4 LT |
303 | .procname = "tcp_keepalive_probes", |
304 | .data = &sysctl_tcp_keepalive_probes, | |
305 | .maxlen = sizeof(int), | |
306 | .mode = 0644, | |
6d9f239a | 307 | .proc_handler = proc_dointvec |
1da177e4 LT |
308 | }, |
309 | { | |
1da177e4 LT |
310 | .procname = "tcp_keepalive_intvl", |
311 | .data = &sysctl_tcp_keepalive_intvl, | |
312 | .maxlen = sizeof(int), | |
313 | .mode = 0644, | |
6d9f239a | 314 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
315 | }, |
316 | { | |
1da177e4 LT |
317 | .procname = "tcp_retries1", |
318 | .data = &sysctl_tcp_retries1, | |
319 | .maxlen = sizeof(int), | |
320 | .mode = 0644, | |
6d9f239a | 321 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
322 | .extra2 = &tcp_retr1_max |
323 | }, | |
324 | { | |
1da177e4 LT |
325 | .procname = "tcp_retries2", |
326 | .data = &sysctl_tcp_retries2, | |
327 | .maxlen = sizeof(int), | |
328 | .mode = 0644, | |
6d9f239a | 329 | .proc_handler = proc_dointvec |
1da177e4 LT |
330 | }, |
331 | { | |
1da177e4 LT |
332 | .procname = "tcp_fin_timeout", |
333 | .data = &sysctl_tcp_fin_timeout, | |
334 | .maxlen = sizeof(int), | |
335 | .mode = 0644, | |
6d9f239a | 336 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
337 | }, |
338 | #ifdef CONFIG_SYN_COOKIES | |
339 | { | |
1da177e4 LT |
340 | .procname = "tcp_syncookies", |
341 | .data = &sysctl_tcp_syncookies, | |
342 | .maxlen = sizeof(int), | |
343 | .mode = 0644, | |
6d9f239a | 344 | .proc_handler = proc_dointvec |
1da177e4 LT |
345 | }, |
346 | #endif | |
347 | { | |
1da177e4 | 348 | .procname = "tcp_tw_recycle", |
295ff7ed | 349 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
350 | .maxlen = sizeof(int), |
351 | .mode = 0644, | |
6d9f239a | 352 | .proc_handler = proc_dointvec |
1da177e4 LT |
353 | }, |
354 | { | |
1da177e4 LT |
355 | .procname = "tcp_abort_on_overflow", |
356 | .data = &sysctl_tcp_abort_on_overflow, | |
357 | .maxlen = sizeof(int), | |
358 | .mode = 0644, | |
6d9f239a | 359 | .proc_handler = proc_dointvec |
1da177e4 LT |
360 | }, |
361 | { | |
1da177e4 LT |
362 | .procname = "tcp_stdurg", |
363 | .data = &sysctl_tcp_stdurg, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
6d9f239a | 366 | .proc_handler = proc_dointvec |
1da177e4 LT |
367 | }, |
368 | { | |
1da177e4 LT |
369 | .procname = "tcp_rfc1337", |
370 | .data = &sysctl_tcp_rfc1337, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
6d9f239a | 373 | .proc_handler = proc_dointvec |
1da177e4 LT |
374 | }, |
375 | { | |
1da177e4 LT |
376 | .procname = "tcp_max_syn_backlog", |
377 | .data = &sysctl_max_syn_backlog, | |
378 | .maxlen = sizeof(int), | |
379 | .mode = 0644, | |
6d9f239a | 380 | .proc_handler = proc_dointvec |
1da177e4 LT |
381 | }, |
382 | { | |
1da177e4 | 383 | .procname = "ip_local_port_range", |
3c689b73 ED |
384 | .data = &sysctl_local_ports.range, |
385 | .maxlen = sizeof(sysctl_local_ports.range), | |
1da177e4 | 386 | .mode = 0644, |
6d9f239a | 387 | .proc_handler = ipv4_local_port_range, |
1da177e4 | 388 | }, |
e3826f1e AW |
389 | { |
390 | .procname = "ip_local_reserved_ports", | |
391 | .data = NULL, /* initialized in sysctl_ipv4_init */ | |
392 | .maxlen = 65536, | |
393 | .mode = 0644, | |
394 | .proc_handler = proc_do_large_bitmap, | |
395 | }, | |
1da177e4 | 396 | { |
1da177e4 LT |
397 | .procname = "igmp_max_memberships", |
398 | .data = &sysctl_igmp_max_memberships, | |
399 | .maxlen = sizeof(int), | |
400 | .mode = 0644, | |
6d9f239a | 401 | .proc_handler = proc_dointvec |
1da177e4 | 402 | }, |
1da177e4 | 403 | { |
1da177e4 LT |
404 | .procname = "igmp_max_msf", |
405 | .data = &sysctl_igmp_max_msf, | |
406 | .maxlen = sizeof(int), | |
407 | .mode = 0644, | |
6d9f239a | 408 | .proc_handler = proc_dointvec |
1da177e4 LT |
409 | }, |
410 | { | |
1da177e4 LT |
411 | .procname = "inet_peer_threshold", |
412 | .data = &inet_peer_threshold, | |
413 | .maxlen = sizeof(int), | |
414 | .mode = 0644, | |
6d9f239a | 415 | .proc_handler = proc_dointvec |
1da177e4 LT |
416 | }, |
417 | { | |
1da177e4 LT |
418 | .procname = "inet_peer_minttl", |
419 | .data = &inet_peer_minttl, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
6d9f239a | 422 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
423 | }, |
424 | { | |
1da177e4 LT |
425 | .procname = "inet_peer_maxttl", |
426 | .data = &inet_peer_maxttl, | |
427 | .maxlen = sizeof(int), | |
428 | .mode = 0644, | |
6d9f239a | 429 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 430 | }, |
1da177e4 | 431 | { |
1da177e4 LT |
432 | .procname = "tcp_orphan_retries", |
433 | .data = &sysctl_tcp_orphan_retries, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
6d9f239a | 436 | .proc_handler = proc_dointvec |
1da177e4 LT |
437 | }, |
438 | { | |
1da177e4 LT |
439 | .procname = "tcp_fack", |
440 | .data = &sysctl_tcp_fack, | |
441 | .maxlen = sizeof(int), | |
442 | .mode = 0644, | |
6d9f239a | 443 | .proc_handler = proc_dointvec |
1da177e4 LT |
444 | }, |
445 | { | |
1da177e4 LT |
446 | .procname = "tcp_reordering", |
447 | .data = &sysctl_tcp_reordering, | |
448 | .maxlen = sizeof(int), | |
449 | .mode = 0644, | |
6d9f239a | 450 | .proc_handler = proc_dointvec |
1da177e4 LT |
451 | }, |
452 | { | |
1da177e4 LT |
453 | .procname = "tcp_ecn", |
454 | .data = &sysctl_tcp_ecn, | |
455 | .maxlen = sizeof(int), | |
456 | .mode = 0644, | |
6d9f239a | 457 | .proc_handler = proc_dointvec |
1da177e4 LT |
458 | }, |
459 | { | |
1da177e4 LT |
460 | .procname = "tcp_dsack", |
461 | .data = &sysctl_tcp_dsack, | |
462 | .maxlen = sizeof(int), | |
463 | .mode = 0644, | |
6d9f239a | 464 | .proc_handler = proc_dointvec |
1da177e4 | 465 | }, |
1da177e4 | 466 | { |
1da177e4 LT |
467 | .procname = "tcp_wmem", |
468 | .data = &sysctl_tcp_wmem, | |
469 | .maxlen = sizeof(sysctl_tcp_wmem), | |
470 | .mode = 0644, | |
6d9f239a | 471 | .proc_handler = proc_dointvec |
1da177e4 LT |
472 | }, |
473 | { | |
1da177e4 LT |
474 | .procname = "tcp_rmem", |
475 | .data = &sysctl_tcp_rmem, | |
476 | .maxlen = sizeof(sysctl_tcp_rmem), | |
477 | .mode = 0644, | |
6d9f239a | 478 | .proc_handler = proc_dointvec |
1da177e4 LT |
479 | }, |
480 | { | |
1da177e4 LT |
481 | .procname = "tcp_app_win", |
482 | .data = &sysctl_tcp_app_win, | |
483 | .maxlen = sizeof(int), | |
484 | .mode = 0644, | |
6d9f239a | 485 | .proc_handler = proc_dointvec |
1da177e4 LT |
486 | }, |
487 | { | |
1da177e4 LT |
488 | .procname = "tcp_adv_win_scale", |
489 | .data = &sysctl_tcp_adv_win_scale, | |
490 | .maxlen = sizeof(int), | |
491 | .mode = 0644, | |
0147fc05 AD |
492 | .proc_handler = proc_dointvec_minmax, |
493 | .extra1 = &tcp_adv_win_scale_min, | |
494 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 495 | }, |
1da177e4 | 496 | { |
1da177e4 LT |
497 | .procname = "tcp_tw_reuse", |
498 | .data = &sysctl_tcp_tw_reuse, | |
499 | .maxlen = sizeof(int), | |
500 | .mode = 0644, | |
6d9f239a | 501 | .proc_handler = proc_dointvec |
1da177e4 LT |
502 | }, |
503 | { | |
1da177e4 LT |
504 | .procname = "tcp_frto", |
505 | .data = &sysctl_tcp_frto, | |
506 | .maxlen = sizeof(int), | |
507 | .mode = 0644, | |
6d9f239a | 508 | .proc_handler = proc_dointvec |
1da177e4 | 509 | }, |
3cfe3baa | 510 | { |
3cfe3baa IJ |
511 | .procname = "tcp_frto_response", |
512 | .data = &sysctl_tcp_frto_response, | |
513 | .maxlen = sizeof(int), | |
514 | .mode = 0644, | |
6d9f239a | 515 | .proc_handler = proc_dointvec |
3cfe3baa | 516 | }, |
1da177e4 | 517 | { |
1da177e4 LT |
518 | .procname = "tcp_low_latency", |
519 | .data = &sysctl_tcp_low_latency, | |
520 | .maxlen = sizeof(int), | |
521 | .mode = 0644, | |
6d9f239a | 522 | .proc_handler = proc_dointvec |
1da177e4 | 523 | }, |
1da177e4 | 524 | { |
1da177e4 LT |
525 | .procname = "tcp_no_metrics_save", |
526 | .data = &sysctl_tcp_nometrics_save, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
6d9f239a | 529 | .proc_handler = proc_dointvec, |
1da177e4 | 530 | }, |
1da177e4 | 531 | { |
1da177e4 LT |
532 | .procname = "tcp_moderate_rcvbuf", |
533 | .data = &sysctl_tcp_moderate_rcvbuf, | |
534 | .maxlen = sizeof(int), | |
535 | .mode = 0644, | |
6d9f239a | 536 | .proc_handler = proc_dointvec, |
1da177e4 LT |
537 | }, |
538 | { | |
1da177e4 LT |
539 | .procname = "tcp_tso_win_divisor", |
540 | .data = &sysctl_tcp_tso_win_divisor, | |
541 | .maxlen = sizeof(int), | |
542 | .mode = 0644, | |
6d9f239a | 543 | .proc_handler = proc_dointvec, |
1da177e4 LT |
544 | }, |
545 | { | |
317a76f9 | 546 | .procname = "tcp_congestion_control", |
1da177e4 | 547 | .mode = 0644, |
317a76f9 | 548 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 549 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 550 | }, |
9772efb9 | 551 | { |
9772efb9 SH |
552 | .procname = "tcp_abc", |
553 | .data = &sysctl_tcp_abc, | |
554 | .maxlen = sizeof(int), | |
555 | .mode = 0644, | |
6d9f239a | 556 | .proc_handler = proc_dointvec, |
9772efb9 | 557 | }, |
5d424d5a | 558 | { |
5d424d5a JH |
559 | .procname = "tcp_mtu_probing", |
560 | .data = &sysctl_tcp_mtu_probing, | |
561 | .maxlen = sizeof(int), | |
562 | .mode = 0644, | |
6d9f239a | 563 | .proc_handler = proc_dointvec, |
5d424d5a JH |
564 | }, |
565 | { | |
5d424d5a JH |
566 | .procname = "tcp_base_mss", |
567 | .data = &sysctl_tcp_base_mss, | |
568 | .maxlen = sizeof(int), | |
569 | .mode = 0644, | |
6d9f239a | 570 | .proc_handler = proc_dointvec, |
5d424d5a | 571 | }, |
e905a9ed | 572 | { |
15d99e02 RJ |
573 | .procname = "tcp_workaround_signed_windows", |
574 | .data = &sysctl_tcp_workaround_signed_windows, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
6d9f239a | 577 | .proc_handler = proc_dointvec |
15d99e02 | 578 | }, |
95937825 CL |
579 | #ifdef CONFIG_NET_DMA |
580 | { | |
95937825 CL |
581 | .procname = "tcp_dma_copybreak", |
582 | .data = &sysctl_tcp_dma_copybreak, | |
583 | .maxlen = sizeof(int), | |
584 | .mode = 0644, | |
6d9f239a | 585 | .proc_handler = proc_dointvec |
95937825 CL |
586 | }, |
587 | #endif | |
35089bb2 | 588 | { |
35089bb2 DM |
589 | .procname = "tcp_slow_start_after_idle", |
590 | .data = &sysctl_tcp_slow_start_after_idle, | |
591 | .maxlen = sizeof(int), | |
592 | .mode = 0644, | |
6d9f239a | 593 | .proc_handler = proc_dointvec |
35089bb2 | 594 | }, |
446fda4f PM |
595 | #ifdef CONFIG_NETLABEL |
596 | { | |
446fda4f PM |
597 | .procname = "cipso_cache_enable", |
598 | .data = &cipso_v4_cache_enabled, | |
599 | .maxlen = sizeof(int), | |
600 | .mode = 0644, | |
6d9f239a | 601 | .proc_handler = proc_dointvec, |
446fda4f PM |
602 | }, |
603 | { | |
446fda4f PM |
604 | .procname = "cipso_cache_bucket_size", |
605 | .data = &cipso_v4_cache_bucketsize, | |
606 | .maxlen = sizeof(int), | |
607 | .mode = 0644, | |
6d9f239a | 608 | .proc_handler = proc_dointvec, |
446fda4f PM |
609 | }, |
610 | { | |
446fda4f PM |
611 | .procname = "cipso_rbm_optfmt", |
612 | .data = &cipso_v4_rbm_optfmt, | |
613 | .maxlen = sizeof(int), | |
614 | .mode = 0644, | |
6d9f239a | 615 | .proc_handler = proc_dointvec, |
446fda4f PM |
616 | }, |
617 | { | |
446fda4f PM |
618 | .procname = "cipso_rbm_strictvalid", |
619 | .data = &cipso_v4_rbm_strictvalid, | |
620 | .maxlen = sizeof(int), | |
621 | .mode = 0644, | |
6d9f239a | 622 | .proc_handler = proc_dointvec, |
446fda4f PM |
623 | }, |
624 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 625 | { |
3ff825b2 SH |
626 | .procname = "tcp_available_congestion_control", |
627 | .maxlen = TCP_CA_BUF_MAX, | |
628 | .mode = 0444, | |
6d9f239a | 629 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 630 | }, |
ce7bc3bf | 631 | { |
ce7bc3bf SH |
632 | .procname = "tcp_allowed_congestion_control", |
633 | .maxlen = TCP_CA_BUF_MAX, | |
634 | .mode = 0644, | |
6d9f239a | 635 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 636 | }, |
886236c1 | 637 | { |
886236c1 JH |
638 | .procname = "tcp_max_ssthresh", |
639 | .data = &sysctl_tcp_max_ssthresh, | |
640 | .maxlen = sizeof(int), | |
641 | .mode = 0644, | |
6d9f239a | 642 | .proc_handler = proc_dointvec, |
886236c1 | 643 | }, |
519855c5 | 644 | { |
519855c5 WAS |
645 | .procname = "tcp_cookie_size", |
646 | .data = &sysctl_tcp_cookie_size, | |
647 | .maxlen = sizeof(int), | |
648 | .mode = 0644, | |
649 | .proc_handler = proc_dointvec | |
650 | }, | |
36e31b0a AP |
651 | { |
652 | .procname = "tcp_thin_linear_timeouts", | |
653 | .data = &sysctl_tcp_thin_linear_timeouts, | |
654 | .maxlen = sizeof(int), | |
655 | .mode = 0644, | |
656 | .proc_handler = proc_dointvec | |
657 | }, | |
7e380175 AP |
658 | { |
659 | .procname = "tcp_thin_dupack", | |
660 | .data = &sysctl_tcp_thin_dupack, | |
661 | .maxlen = sizeof(int), | |
662 | .mode = 0644, | |
663 | .proc_handler = proc_dointvec | |
664 | }, | |
95766fff | 665 | { |
95766fff HA |
666 | .procname = "udp_mem", |
667 | .data = &sysctl_udp_mem, | |
668 | .maxlen = sizeof(sysctl_udp_mem), | |
669 | .mode = 0644, | |
8d987e5c | 670 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
671 | }, |
672 | { | |
95766fff HA |
673 | .procname = "udp_rmem_min", |
674 | .data = &sysctl_udp_rmem_min, | |
675 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
676 | .mode = 0644, | |
6d9f239a | 677 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
678 | .extra1 = &zero |
679 | }, | |
680 | { | |
95766fff HA |
681 | .procname = "udp_wmem_min", |
682 | .data = &sysctl_udp_wmem_min, | |
683 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
684 | .mode = 0644, | |
6d9f239a | 685 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
686 | .extra1 = &zero |
687 | }, | |
f8572d8f | 688 | { } |
1da177e4 | 689 | }; |
3e37c3f9 | 690 | |
68528f09 PE |
691 | static struct ctl_table ipv4_net_table[] = { |
692 | { | |
68528f09 PE |
693 | .procname = "icmp_echo_ignore_all", |
694 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
695 | .maxlen = sizeof(int), | |
696 | .mode = 0644, | |
6d9f239a | 697 | .proc_handler = proc_dointvec |
68528f09 PE |
698 | }, |
699 | { | |
68528f09 PE |
700 | .procname = "icmp_echo_ignore_broadcasts", |
701 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
702 | .maxlen = sizeof(int), | |
703 | .mode = 0644, | |
6d9f239a | 704 | .proc_handler = proc_dointvec |
68528f09 PE |
705 | }, |
706 | { | |
68528f09 PE |
707 | .procname = "icmp_ignore_bogus_error_responses", |
708 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
709 | .maxlen = sizeof(int), | |
710 | .mode = 0644, | |
6d9f239a | 711 | .proc_handler = proc_dointvec |
68528f09 PE |
712 | }, |
713 | { | |
68528f09 PE |
714 | .procname = "icmp_errors_use_inbound_ifaddr", |
715 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
716 | .maxlen = sizeof(int), | |
717 | .mode = 0644, | |
6d9f239a | 718 | .proc_handler = proc_dointvec |
68528f09 PE |
719 | }, |
720 | { | |
68528f09 PE |
721 | .procname = "icmp_ratelimit", |
722 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
723 | .maxlen = sizeof(int), | |
724 | .mode = 0644, | |
6d9f239a | 725 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
726 | }, |
727 | { | |
68528f09 PE |
728 | .procname = "icmp_ratemask", |
729 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
730 | .maxlen = sizeof(int), | |
731 | .mode = 0644, | |
6d9f239a | 732 | .proc_handler = proc_dointvec |
68528f09 | 733 | }, |
1080d709 | 734 | { |
1080d709 NH |
735 | .procname = "rt_cache_rebuild_count", |
736 | .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, | |
737 | .maxlen = sizeof(int), | |
738 | .mode = 0644, | |
6d9f239a | 739 | .proc_handler = proc_dointvec |
1080d709 | 740 | }, |
c319b4d7 VK |
741 | { |
742 | .procname = "ping_group_range", | |
743 | .data = &init_net.ipv4.sysctl_ping_group_range, | |
744 | .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range), | |
745 | .mode = 0644, | |
746 | .proc_handler = ipv4_ping_group_range, | |
747 | }, | |
3dc43e3e GC |
748 | { |
749 | .procname = "tcp_mem", | |
750 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_mem), | |
751 | .mode = 0644, | |
752 | .proc_handler = ipv4_tcp_mem, | |
753 | }, | |
68528f09 PE |
754 | { } |
755 | }; | |
756 | ||
3d7cc2ba | 757 | struct ctl_path net_ipv4_ctl_path[] = { |
f8572d8f EB |
758 | { .procname = "net", }, |
759 | { .procname = "ipv4", }, | |
3e37c3f9 PE |
760 | { }, |
761 | }; | |
3d7cc2ba | 762 | EXPORT_SYMBOL_GPL(net_ipv4_ctl_path); |
3e37c3f9 | 763 | |
1577519d PE |
764 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
765 | { | |
68528f09 | 766 | struct ctl_table *table; |
3dc43e3e | 767 | unsigned long limit; |
68528f09 PE |
768 | |
769 | table = ipv4_net_table; | |
09ad9bc7 | 770 | if (!net_eq(net, &init_net)) { |
68528f09 PE |
771 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
772 | if (table == NULL) | |
773 | goto err_alloc; | |
774 | ||
775 | table[0].data = | |
776 | &net->ipv4.sysctl_icmp_echo_ignore_all; | |
777 | table[1].data = | |
778 | &net->ipv4.sysctl_icmp_echo_ignore_broadcasts; | |
779 | table[2].data = | |
780 | &net->ipv4.sysctl_icmp_ignore_bogus_error_responses; | |
781 | table[3].data = | |
782 | &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr; | |
783 | table[4].data = | |
784 | &net->ipv4.sysctl_icmp_ratelimit; | |
785 | table[5].data = | |
786 | &net->ipv4.sysctl_icmp_ratemask; | |
1080d709 NH |
787 | table[6].data = |
788 | &net->ipv4.sysctl_rt_cache_rebuild_count; | |
c319b4d7 VK |
789 | table[7].data = |
790 | &net->ipv4.sysctl_ping_group_range; | |
791 | ||
68528f09 PE |
792 | } |
793 | ||
c319b4d7 VK |
794 | /* |
795 | * Sane defaults - nobody may create ping sockets. | |
796 | * Boot scripts should set this to distro-specific group. | |
797 | */ | |
798 | net->ipv4.sysctl_ping_group_range[0] = 1; | |
799 | net->ipv4.sysctl_ping_group_range[1] = 0; | |
800 | ||
1080d709 NH |
801 | net->ipv4.sysctl_rt_cache_rebuild_count = 4; |
802 | ||
3dc43e3e GC |
803 | limit = nr_free_buffer_pages() / 8; |
804 | limit = max(limit, 128UL); | |
805 | net->ipv4.sysctl_tcp_mem[0] = limit / 4 * 3; | |
806 | net->ipv4.sysctl_tcp_mem[1] = limit; | |
807 | net->ipv4.sysctl_tcp_mem[2] = net->ipv4.sysctl_tcp_mem[0] * 2; | |
808 | ||
68528f09 PE |
809 | net->ipv4.ipv4_hdr = register_net_sysctl_table(net, |
810 | net_ipv4_ctl_path, table); | |
811 | if (net->ipv4.ipv4_hdr == NULL) | |
812 | goto err_reg; | |
813 | ||
1577519d | 814 | return 0; |
68528f09 PE |
815 | |
816 | err_reg: | |
09ad9bc7 | 817 | if (!net_eq(net, &init_net)) |
68528f09 PE |
818 | kfree(table); |
819 | err_alloc: | |
820 | return -ENOMEM; | |
1577519d PE |
821 | } |
822 | ||
823 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
824 | { | |
68528f09 PE |
825 | struct ctl_table *table; |
826 | ||
827 | table = net->ipv4.ipv4_hdr->ctl_table_arg; | |
828 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
829 | kfree(table); | |
1577519d PE |
830 | } |
831 | ||
832 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
833 | .init = ipv4_sysctl_init_net, | |
834 | .exit = ipv4_sysctl_exit_net, | |
835 | }; | |
836 | ||
3e37c3f9 PE |
837 | static __init int sysctl_ipv4_init(void) |
838 | { | |
839 | struct ctl_table_header *hdr; | |
e3826f1e AW |
840 | struct ctl_table *i; |
841 | ||
842 | for (i = ipv4_table; i->procname; i++) { | |
843 | if (strcmp(i->procname, "ip_local_reserved_ports") == 0) { | |
844 | i->data = sysctl_local_reserved_ports; | |
845 | break; | |
846 | } | |
847 | } | |
848 | if (!i->procname) | |
849 | return -EINVAL; | |
3e37c3f9 | 850 | |
3d7cc2ba | 851 | hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table); |
1577519d PE |
852 | if (hdr == NULL) |
853 | return -ENOMEM; | |
854 | ||
855 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
856 | unregister_sysctl_table(hdr); | |
857 | return -ENOMEM; | |
858 | } | |
859 | ||
860 | return 0; | |
3e37c3f9 PE |
861 | } |
862 | ||
863 | __initcall(sysctl_ipv4_init); |