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; |
eed530b6 | 30 | static int two = 2; |
e905a9ed | 31 | static int tcp_retr1_max = 255; |
1da177e4 LT |
32 | static int ip_local_port_range_min[] = { 1, 1 }; |
33 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
34 | static int tcp_adv_win_scale_min = -31; |
35 | static int tcp_adv_win_scale_max = 31; | |
249fab77 ED |
36 | static int ip_ttl_min = 1; |
37 | static int ip_ttl_max = 255; | |
c319b4d7 VK |
38 | static int ip_ping_group_range_min[] = { 0, 0 }; |
39 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 40 | |
227b60f5 SH |
41 | /* Update system visible IP port range */ |
42 | static void set_local_port_range(int range[2]) | |
43 | { | |
3c689b73 ED |
44 | write_seqlock(&sysctl_local_ports.lock); |
45 | sysctl_local_ports.range[0] = range[0]; | |
46 | sysctl_local_ports.range[1] = range[1]; | |
47 | write_sequnlock(&sysctl_local_ports.lock); | |
227b60f5 SH |
48 | } |
49 | ||
50 | /* Validate changes from /proc interface. */ | |
8d65af78 | 51 | static int ipv4_local_port_range(ctl_table *table, int write, |
227b60f5 SH |
52 | void __user *buffer, |
53 | size_t *lenp, loff_t *ppos) | |
54 | { | |
55 | int ret; | |
3c689b73 | 56 | int range[2]; |
227b60f5 SH |
57 | ctl_table tmp = { |
58 | .data = &range, | |
59 | .maxlen = sizeof(range), | |
60 | .mode = table->mode, | |
61 | .extra1 = &ip_local_port_range_min, | |
62 | .extra2 = &ip_local_port_range_max, | |
63 | }; | |
64 | ||
3c689b73 | 65 | inet_get_local_port_range(range, range + 1); |
8d65af78 | 66 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
67 | |
68 | if (write && ret == 0) { | |
a25de534 | 69 | if (range[1] < range[0]) |
227b60f5 SH |
70 | ret = -EINVAL; |
71 | else | |
72 | set_local_port_range(range); | |
73 | } | |
74 | ||
75 | return ret; | |
76 | } | |
77 | ||
c319b4d7 | 78 | |
e6560d4d | 79 | static void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high) |
c319b4d7 VK |
80 | { |
81 | gid_t *data = table->data; | |
95c96174 | 82 | unsigned int seq; |
c319b4d7 VK |
83 | do { |
84 | seq = read_seqbegin(&sysctl_local_ports.lock); | |
85 | ||
86 | *low = data[0]; | |
87 | *high = data[1]; | |
88 | } while (read_seqretry(&sysctl_local_ports.lock, seq)); | |
89 | } | |
90 | ||
91 | /* Update system visible IP port range */ | |
e6560d4d | 92 | static void set_ping_group_range(struct ctl_table *table, gid_t range[2]) |
c319b4d7 VK |
93 | { |
94 | gid_t *data = table->data; | |
95 | write_seqlock(&sysctl_local_ports.lock); | |
96 | data[0] = range[0]; | |
97 | data[1] = range[1]; | |
98 | write_sequnlock(&sysctl_local_ports.lock); | |
99 | } | |
100 | ||
101 | /* Validate changes from /proc interface. */ | |
102 | static int ipv4_ping_group_range(ctl_table *table, int write, | |
103 | void __user *buffer, | |
104 | size_t *lenp, loff_t *ppos) | |
105 | { | |
106 | int ret; | |
107 | gid_t range[2]; | |
108 | ctl_table tmp = { | |
109 | .data = &range, | |
110 | .maxlen = sizeof(range), | |
111 | .mode = table->mode, | |
112 | .extra1 = &ip_ping_group_range_min, | |
113 | .extra2 = &ip_ping_group_range_max, | |
114 | }; | |
115 | ||
116 | inet_get_ping_group_range_table(table, range, range + 1); | |
117 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
118 | ||
119 | if (write && ret == 0) | |
120 | set_ping_group_range(table, range); | |
121 | ||
122 | return ret; | |
123 | } | |
124 | ||
8d65af78 | 125 | static int proc_tcp_congestion_control(ctl_table *ctl, int write, |
317a76f9 SH |
126 | void __user *buffer, size_t *lenp, loff_t *ppos) |
127 | { | |
128 | char val[TCP_CA_NAME_MAX]; | |
129 | ctl_table tbl = { | |
130 | .data = val, | |
131 | .maxlen = TCP_CA_NAME_MAX, | |
132 | }; | |
133 | int ret; | |
134 | ||
135 | tcp_get_default_congestion_control(val); | |
136 | ||
8d65af78 | 137 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
138 | if (write && ret == 0) |
139 | ret = tcp_set_default_congestion_control(val); | |
140 | return ret; | |
141 | } | |
142 | ||
3ff825b2 | 143 | static int proc_tcp_available_congestion_control(ctl_table *ctl, |
8d65af78 | 144 | int write, |
3ff825b2 SH |
145 | void __user *buffer, size_t *lenp, |
146 | loff_t *ppos) | |
147 | { | |
148 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; | |
149 | int ret; | |
150 | ||
151 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
152 | if (!tbl.data) | |
153 | return -ENOMEM; | |
154 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 155 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
156 | kfree(tbl.data); |
157 | return ret; | |
158 | } | |
159 | ||
ce7bc3bf | 160 | static int proc_allowed_congestion_control(ctl_table *ctl, |
8d65af78 | 161 | int write, |
ce7bc3bf SH |
162 | void __user *buffer, size_t *lenp, |
163 | loff_t *ppos) | |
164 | { | |
165 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; | |
166 | int ret; | |
167 | ||
168 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
169 | if (!tbl.data) | |
170 | return -ENOMEM; | |
171 | ||
172 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 173 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
174 | if (write && ret == 0) |
175 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
176 | kfree(tbl.data); | |
177 | return ret; | |
178 | } | |
179 | ||
3dc43e3e GC |
180 | static int ipv4_tcp_mem(ctl_table *ctl, int write, |
181 | void __user *buffer, size_t *lenp, | |
182 | loff_t *ppos) | |
183 | { | |
184 | int ret; | |
185 | unsigned long vec[3]; | |
186 | struct net *net = current->nsproxy->net_ns; | |
3aaabe23 GC |
187 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM |
188 | struct mem_cgroup *memcg; | |
189 | #endif | |
3dc43e3e GC |
190 | |
191 | ctl_table tmp = { | |
192 | .data = &vec, | |
193 | .maxlen = sizeof(vec), | |
194 | .mode = ctl->mode, | |
195 | }; | |
196 | ||
197 | if (!write) { | |
198 | ctl->data = &net->ipv4.sysctl_tcp_mem; | |
199 | return proc_doulongvec_minmax(ctl, write, buffer, lenp, ppos); | |
200 | } | |
201 | ||
202 | ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos); | |
203 | if (ret) | |
204 | return ret; | |
205 | ||
3aaabe23 GC |
206 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM |
207 | rcu_read_lock(); | |
208 | memcg = mem_cgroup_from_task(current); | |
209 | ||
210 | tcp_prot_mem(memcg, vec[0], 0); | |
211 | tcp_prot_mem(memcg, vec[1], 1); | |
212 | tcp_prot_mem(memcg, vec[2], 2); | |
213 | rcu_read_unlock(); | |
214 | #endif | |
215 | ||
3dc43e3e GC |
216 | net->ipv4.sysctl_tcp_mem[0] = vec[0]; |
217 | net->ipv4.sysctl_tcp_mem[1] = vec[1]; | |
218 | net->ipv4.sysctl_tcp_mem[2] = vec[2]; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
3e37c3f9 | 223 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 224 | { |
1da177e4 LT |
225 | .procname = "tcp_timestamps", |
226 | .data = &sysctl_tcp_timestamps, | |
227 | .maxlen = sizeof(int), | |
228 | .mode = 0644, | |
6d9f239a | 229 | .proc_handler = proc_dointvec |
1da177e4 | 230 | }, |
e905a9ed | 231 | { |
1da177e4 LT |
232 | .procname = "tcp_window_scaling", |
233 | .data = &sysctl_tcp_window_scaling, | |
234 | .maxlen = sizeof(int), | |
235 | .mode = 0644, | |
6d9f239a | 236 | .proc_handler = proc_dointvec |
1da177e4 | 237 | }, |
e905a9ed | 238 | { |
1da177e4 LT |
239 | .procname = "tcp_sack", |
240 | .data = &sysctl_tcp_sack, | |
241 | .maxlen = sizeof(int), | |
242 | .mode = 0644, | |
6d9f239a | 243 | .proc_handler = proc_dointvec |
1da177e4 | 244 | }, |
e905a9ed | 245 | { |
1da177e4 LT |
246 | .procname = "tcp_retrans_collapse", |
247 | .data = &sysctl_tcp_retrans_collapse, | |
248 | .maxlen = sizeof(int), | |
249 | .mode = 0644, | |
6d9f239a | 250 | .proc_handler = proc_dointvec |
1da177e4 | 251 | }, |
e905a9ed | 252 | { |
1da177e4 | 253 | .procname = "ip_default_ttl", |
e905a9ed | 254 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
255 | .maxlen = sizeof(int), |
256 | .mode = 0644, | |
249fab77 ED |
257 | .proc_handler = proc_dointvec_minmax, |
258 | .extra1 = &ip_ttl_min, | |
259 | .extra2 = &ip_ttl_max, | |
1da177e4 | 260 | }, |
e905a9ed | 261 | { |
1da177e4 LT |
262 | .procname = "ip_no_pmtu_disc", |
263 | .data = &ipv4_config.no_pmtu_disc, | |
264 | .maxlen = sizeof(int), | |
265 | .mode = 0644, | |
6d9f239a | 266 | .proc_handler = proc_dointvec |
1da177e4 LT |
267 | }, |
268 | { | |
1da177e4 LT |
269 | .procname = "ip_nonlocal_bind", |
270 | .data = &sysctl_ip_nonlocal_bind, | |
271 | .maxlen = sizeof(int), | |
272 | .mode = 0644, | |
6d9f239a | 273 | .proc_handler = proc_dointvec |
1da177e4 LT |
274 | }, |
275 | { | |
1da177e4 LT |
276 | .procname = "tcp_syn_retries", |
277 | .data = &sysctl_tcp_syn_retries, | |
278 | .maxlen = sizeof(int), | |
279 | .mode = 0644, | |
6d9f239a | 280 | .proc_handler = proc_dointvec |
1da177e4 LT |
281 | }, |
282 | { | |
1da177e4 LT |
283 | .procname = "tcp_synack_retries", |
284 | .data = &sysctl_tcp_synack_retries, | |
285 | .maxlen = sizeof(int), | |
286 | .mode = 0644, | |
6d9f239a | 287 | .proc_handler = proc_dointvec |
1da177e4 LT |
288 | }, |
289 | { | |
1da177e4 LT |
290 | .procname = "tcp_max_orphans", |
291 | .data = &sysctl_tcp_max_orphans, | |
292 | .maxlen = sizeof(int), | |
293 | .mode = 0644, | |
6d9f239a | 294 | .proc_handler = proc_dointvec |
1da177e4 LT |
295 | }, |
296 | { | |
1da177e4 | 297 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 298 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
299 | .maxlen = sizeof(int), |
300 | .mode = 0644, | |
6d9f239a | 301 | .proc_handler = proc_dointvec |
1da177e4 | 302 | }, |
6648bd7e AD |
303 | { |
304 | .procname = "ip_early_demux", | |
305 | .data = &sysctl_ip_early_demux, | |
306 | .maxlen = sizeof(int), | |
307 | .mode = 0644, | |
308 | .proc_handler = proc_dointvec | |
309 | }, | |
1da177e4 | 310 | { |
1da177e4 LT |
311 | .procname = "ip_dynaddr", |
312 | .data = &sysctl_ip_dynaddr, | |
313 | .maxlen = sizeof(int), | |
314 | .mode = 0644, | |
6d9f239a | 315 | .proc_handler = proc_dointvec |
1da177e4 | 316 | }, |
1da177e4 | 317 | { |
1da177e4 LT |
318 | .procname = "tcp_keepalive_time", |
319 | .data = &sysctl_tcp_keepalive_time, | |
320 | .maxlen = sizeof(int), | |
321 | .mode = 0644, | |
6d9f239a | 322 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
323 | }, |
324 | { | |
1da177e4 LT |
325 | .procname = "tcp_keepalive_probes", |
326 | .data = &sysctl_tcp_keepalive_probes, | |
327 | .maxlen = sizeof(int), | |
328 | .mode = 0644, | |
6d9f239a | 329 | .proc_handler = proc_dointvec |
1da177e4 LT |
330 | }, |
331 | { | |
1da177e4 LT |
332 | .procname = "tcp_keepalive_intvl", |
333 | .data = &sysctl_tcp_keepalive_intvl, | |
334 | .maxlen = sizeof(int), | |
335 | .mode = 0644, | |
6d9f239a | 336 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
337 | }, |
338 | { | |
1da177e4 LT |
339 | .procname = "tcp_retries1", |
340 | .data = &sysctl_tcp_retries1, | |
341 | .maxlen = sizeof(int), | |
342 | .mode = 0644, | |
6d9f239a | 343 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
344 | .extra2 = &tcp_retr1_max |
345 | }, | |
346 | { | |
1da177e4 LT |
347 | .procname = "tcp_retries2", |
348 | .data = &sysctl_tcp_retries2, | |
349 | .maxlen = sizeof(int), | |
350 | .mode = 0644, | |
6d9f239a | 351 | .proc_handler = proc_dointvec |
1da177e4 LT |
352 | }, |
353 | { | |
1da177e4 LT |
354 | .procname = "tcp_fin_timeout", |
355 | .data = &sysctl_tcp_fin_timeout, | |
356 | .maxlen = sizeof(int), | |
357 | .mode = 0644, | |
6d9f239a | 358 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
359 | }, |
360 | #ifdef CONFIG_SYN_COOKIES | |
361 | { | |
1da177e4 LT |
362 | .procname = "tcp_syncookies", |
363 | .data = &sysctl_tcp_syncookies, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
6d9f239a | 366 | .proc_handler = proc_dointvec |
1da177e4 LT |
367 | }, |
368 | #endif | |
369 | { | |
1da177e4 | 370 | .procname = "tcp_tw_recycle", |
295ff7ed | 371 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
372 | .maxlen = sizeof(int), |
373 | .mode = 0644, | |
6d9f239a | 374 | .proc_handler = proc_dointvec |
1da177e4 LT |
375 | }, |
376 | { | |
1da177e4 LT |
377 | .procname = "tcp_abort_on_overflow", |
378 | .data = &sysctl_tcp_abort_on_overflow, | |
379 | .maxlen = sizeof(int), | |
380 | .mode = 0644, | |
6d9f239a | 381 | .proc_handler = proc_dointvec |
1da177e4 LT |
382 | }, |
383 | { | |
1da177e4 LT |
384 | .procname = "tcp_stdurg", |
385 | .data = &sysctl_tcp_stdurg, | |
386 | .maxlen = sizeof(int), | |
387 | .mode = 0644, | |
6d9f239a | 388 | .proc_handler = proc_dointvec |
1da177e4 LT |
389 | }, |
390 | { | |
1da177e4 LT |
391 | .procname = "tcp_rfc1337", |
392 | .data = &sysctl_tcp_rfc1337, | |
393 | .maxlen = sizeof(int), | |
394 | .mode = 0644, | |
6d9f239a | 395 | .proc_handler = proc_dointvec |
1da177e4 LT |
396 | }, |
397 | { | |
1da177e4 LT |
398 | .procname = "tcp_max_syn_backlog", |
399 | .data = &sysctl_max_syn_backlog, | |
400 | .maxlen = sizeof(int), | |
401 | .mode = 0644, | |
6d9f239a | 402 | .proc_handler = proc_dointvec |
1da177e4 LT |
403 | }, |
404 | { | |
1da177e4 | 405 | .procname = "ip_local_port_range", |
3c689b73 ED |
406 | .data = &sysctl_local_ports.range, |
407 | .maxlen = sizeof(sysctl_local_ports.range), | |
1da177e4 | 408 | .mode = 0644, |
6d9f239a | 409 | .proc_handler = ipv4_local_port_range, |
1da177e4 | 410 | }, |
e3826f1e AW |
411 | { |
412 | .procname = "ip_local_reserved_ports", | |
413 | .data = NULL, /* initialized in sysctl_ipv4_init */ | |
414 | .maxlen = 65536, | |
415 | .mode = 0644, | |
416 | .proc_handler = proc_do_large_bitmap, | |
417 | }, | |
1da177e4 | 418 | { |
1da177e4 LT |
419 | .procname = "igmp_max_memberships", |
420 | .data = &sysctl_igmp_max_memberships, | |
421 | .maxlen = sizeof(int), | |
422 | .mode = 0644, | |
6d9f239a | 423 | .proc_handler = proc_dointvec |
1da177e4 | 424 | }, |
1da177e4 | 425 | { |
1da177e4 LT |
426 | .procname = "igmp_max_msf", |
427 | .data = &sysctl_igmp_max_msf, | |
428 | .maxlen = sizeof(int), | |
429 | .mode = 0644, | |
6d9f239a | 430 | .proc_handler = proc_dointvec |
1da177e4 LT |
431 | }, |
432 | { | |
1da177e4 LT |
433 | .procname = "inet_peer_threshold", |
434 | .data = &inet_peer_threshold, | |
435 | .maxlen = sizeof(int), | |
436 | .mode = 0644, | |
6d9f239a | 437 | .proc_handler = proc_dointvec |
1da177e4 LT |
438 | }, |
439 | { | |
1da177e4 LT |
440 | .procname = "inet_peer_minttl", |
441 | .data = &inet_peer_minttl, | |
442 | .maxlen = sizeof(int), | |
443 | .mode = 0644, | |
6d9f239a | 444 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
445 | }, |
446 | { | |
1da177e4 LT |
447 | .procname = "inet_peer_maxttl", |
448 | .data = &inet_peer_maxttl, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
6d9f239a | 451 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 452 | }, |
1da177e4 | 453 | { |
1da177e4 LT |
454 | .procname = "tcp_orphan_retries", |
455 | .data = &sysctl_tcp_orphan_retries, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
6d9f239a | 458 | .proc_handler = proc_dointvec |
1da177e4 LT |
459 | }, |
460 | { | |
1da177e4 LT |
461 | .procname = "tcp_fack", |
462 | .data = &sysctl_tcp_fack, | |
463 | .maxlen = sizeof(int), | |
464 | .mode = 0644, | |
6d9f239a | 465 | .proc_handler = proc_dointvec |
1da177e4 LT |
466 | }, |
467 | { | |
1da177e4 LT |
468 | .procname = "tcp_reordering", |
469 | .data = &sysctl_tcp_reordering, | |
470 | .maxlen = sizeof(int), | |
471 | .mode = 0644, | |
6d9f239a | 472 | .proc_handler = proc_dointvec |
1da177e4 LT |
473 | }, |
474 | { | |
1da177e4 LT |
475 | .procname = "tcp_ecn", |
476 | .data = &sysctl_tcp_ecn, | |
477 | .maxlen = sizeof(int), | |
478 | .mode = 0644, | |
6d9f239a | 479 | .proc_handler = proc_dointvec |
1da177e4 LT |
480 | }, |
481 | { | |
1da177e4 LT |
482 | .procname = "tcp_dsack", |
483 | .data = &sysctl_tcp_dsack, | |
484 | .maxlen = sizeof(int), | |
485 | .mode = 0644, | |
6d9f239a | 486 | .proc_handler = proc_dointvec |
1da177e4 | 487 | }, |
1da177e4 | 488 | { |
1da177e4 LT |
489 | .procname = "tcp_wmem", |
490 | .data = &sysctl_tcp_wmem, | |
491 | .maxlen = sizeof(sysctl_tcp_wmem), | |
492 | .mode = 0644, | |
6d9f239a | 493 | .proc_handler = proc_dointvec |
1da177e4 LT |
494 | }, |
495 | { | |
1da177e4 LT |
496 | .procname = "tcp_rmem", |
497 | .data = &sysctl_tcp_rmem, | |
498 | .maxlen = sizeof(sysctl_tcp_rmem), | |
499 | .mode = 0644, | |
6d9f239a | 500 | .proc_handler = proc_dointvec |
1da177e4 LT |
501 | }, |
502 | { | |
1da177e4 LT |
503 | .procname = "tcp_app_win", |
504 | .data = &sysctl_tcp_app_win, | |
505 | .maxlen = sizeof(int), | |
506 | .mode = 0644, | |
6d9f239a | 507 | .proc_handler = proc_dointvec |
1da177e4 LT |
508 | }, |
509 | { | |
1da177e4 LT |
510 | .procname = "tcp_adv_win_scale", |
511 | .data = &sysctl_tcp_adv_win_scale, | |
512 | .maxlen = sizeof(int), | |
513 | .mode = 0644, | |
0147fc05 AD |
514 | .proc_handler = proc_dointvec_minmax, |
515 | .extra1 = &tcp_adv_win_scale_min, | |
516 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 517 | }, |
1da177e4 | 518 | { |
1da177e4 LT |
519 | .procname = "tcp_tw_reuse", |
520 | .data = &sysctl_tcp_tw_reuse, | |
521 | .maxlen = sizeof(int), | |
522 | .mode = 0644, | |
6d9f239a | 523 | .proc_handler = proc_dointvec |
1da177e4 LT |
524 | }, |
525 | { | |
1da177e4 LT |
526 | .procname = "tcp_frto", |
527 | .data = &sysctl_tcp_frto, | |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
6d9f239a | 530 | .proc_handler = proc_dointvec |
1da177e4 | 531 | }, |
3cfe3baa | 532 | { |
3cfe3baa IJ |
533 | .procname = "tcp_frto_response", |
534 | .data = &sysctl_tcp_frto_response, | |
535 | .maxlen = sizeof(int), | |
536 | .mode = 0644, | |
6d9f239a | 537 | .proc_handler = proc_dointvec |
3cfe3baa | 538 | }, |
1da177e4 | 539 | { |
1da177e4 LT |
540 | .procname = "tcp_low_latency", |
541 | .data = &sysctl_tcp_low_latency, | |
542 | .maxlen = sizeof(int), | |
543 | .mode = 0644, | |
6d9f239a | 544 | .proc_handler = proc_dointvec |
1da177e4 | 545 | }, |
1da177e4 | 546 | { |
1da177e4 LT |
547 | .procname = "tcp_no_metrics_save", |
548 | .data = &sysctl_tcp_nometrics_save, | |
549 | .maxlen = sizeof(int), | |
550 | .mode = 0644, | |
6d9f239a | 551 | .proc_handler = proc_dointvec, |
1da177e4 | 552 | }, |
1da177e4 | 553 | { |
1da177e4 LT |
554 | .procname = "tcp_moderate_rcvbuf", |
555 | .data = &sysctl_tcp_moderate_rcvbuf, | |
556 | .maxlen = sizeof(int), | |
557 | .mode = 0644, | |
6d9f239a | 558 | .proc_handler = proc_dointvec, |
1da177e4 LT |
559 | }, |
560 | { | |
1da177e4 LT |
561 | .procname = "tcp_tso_win_divisor", |
562 | .data = &sysctl_tcp_tso_win_divisor, | |
563 | .maxlen = sizeof(int), | |
564 | .mode = 0644, | |
6d9f239a | 565 | .proc_handler = proc_dointvec, |
1da177e4 LT |
566 | }, |
567 | { | |
317a76f9 | 568 | .procname = "tcp_congestion_control", |
1da177e4 | 569 | .mode = 0644, |
317a76f9 | 570 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 571 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 572 | }, |
9772efb9 | 573 | { |
9772efb9 SH |
574 | .procname = "tcp_abc", |
575 | .data = &sysctl_tcp_abc, | |
576 | .maxlen = sizeof(int), | |
577 | .mode = 0644, | |
6d9f239a | 578 | .proc_handler = proc_dointvec, |
9772efb9 | 579 | }, |
5d424d5a | 580 | { |
5d424d5a JH |
581 | .procname = "tcp_mtu_probing", |
582 | .data = &sysctl_tcp_mtu_probing, | |
583 | .maxlen = sizeof(int), | |
584 | .mode = 0644, | |
6d9f239a | 585 | .proc_handler = proc_dointvec, |
5d424d5a JH |
586 | }, |
587 | { | |
5d424d5a JH |
588 | .procname = "tcp_base_mss", |
589 | .data = &sysctl_tcp_base_mss, | |
590 | .maxlen = sizeof(int), | |
591 | .mode = 0644, | |
6d9f239a | 592 | .proc_handler = proc_dointvec, |
5d424d5a | 593 | }, |
e905a9ed | 594 | { |
15d99e02 RJ |
595 | .procname = "tcp_workaround_signed_windows", |
596 | .data = &sysctl_tcp_workaround_signed_windows, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
6d9f239a | 599 | .proc_handler = proc_dointvec |
15d99e02 | 600 | }, |
46d3ceab ED |
601 | { |
602 | .procname = "tcp_limit_output_bytes", | |
603 | .data = &sysctl_tcp_limit_output_bytes, | |
604 | .maxlen = sizeof(int), | |
605 | .mode = 0644, | |
606 | .proc_handler = proc_dointvec | |
607 | }, | |
95937825 CL |
608 | #ifdef CONFIG_NET_DMA |
609 | { | |
95937825 CL |
610 | .procname = "tcp_dma_copybreak", |
611 | .data = &sysctl_tcp_dma_copybreak, | |
612 | .maxlen = sizeof(int), | |
613 | .mode = 0644, | |
6d9f239a | 614 | .proc_handler = proc_dointvec |
95937825 CL |
615 | }, |
616 | #endif | |
35089bb2 | 617 | { |
35089bb2 DM |
618 | .procname = "tcp_slow_start_after_idle", |
619 | .data = &sysctl_tcp_slow_start_after_idle, | |
620 | .maxlen = sizeof(int), | |
621 | .mode = 0644, | |
6d9f239a | 622 | .proc_handler = proc_dointvec |
35089bb2 | 623 | }, |
446fda4f PM |
624 | #ifdef CONFIG_NETLABEL |
625 | { | |
446fda4f PM |
626 | .procname = "cipso_cache_enable", |
627 | .data = &cipso_v4_cache_enabled, | |
628 | .maxlen = sizeof(int), | |
629 | .mode = 0644, | |
6d9f239a | 630 | .proc_handler = proc_dointvec, |
446fda4f PM |
631 | }, |
632 | { | |
446fda4f PM |
633 | .procname = "cipso_cache_bucket_size", |
634 | .data = &cipso_v4_cache_bucketsize, | |
635 | .maxlen = sizeof(int), | |
636 | .mode = 0644, | |
6d9f239a | 637 | .proc_handler = proc_dointvec, |
446fda4f PM |
638 | }, |
639 | { | |
446fda4f PM |
640 | .procname = "cipso_rbm_optfmt", |
641 | .data = &cipso_v4_rbm_optfmt, | |
642 | .maxlen = sizeof(int), | |
643 | .mode = 0644, | |
6d9f239a | 644 | .proc_handler = proc_dointvec, |
446fda4f PM |
645 | }, |
646 | { | |
446fda4f PM |
647 | .procname = "cipso_rbm_strictvalid", |
648 | .data = &cipso_v4_rbm_strictvalid, | |
649 | .maxlen = sizeof(int), | |
650 | .mode = 0644, | |
6d9f239a | 651 | .proc_handler = proc_dointvec, |
446fda4f PM |
652 | }, |
653 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 654 | { |
3ff825b2 SH |
655 | .procname = "tcp_available_congestion_control", |
656 | .maxlen = TCP_CA_BUF_MAX, | |
657 | .mode = 0444, | |
6d9f239a | 658 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 659 | }, |
ce7bc3bf | 660 | { |
ce7bc3bf SH |
661 | .procname = "tcp_allowed_congestion_control", |
662 | .maxlen = TCP_CA_BUF_MAX, | |
663 | .mode = 0644, | |
6d9f239a | 664 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 665 | }, |
886236c1 | 666 | { |
886236c1 JH |
667 | .procname = "tcp_max_ssthresh", |
668 | .data = &sysctl_tcp_max_ssthresh, | |
669 | .maxlen = sizeof(int), | |
670 | .mode = 0644, | |
6d9f239a | 671 | .proc_handler = proc_dointvec, |
886236c1 | 672 | }, |
519855c5 | 673 | { |
519855c5 WAS |
674 | .procname = "tcp_cookie_size", |
675 | .data = &sysctl_tcp_cookie_size, | |
676 | .maxlen = sizeof(int), | |
677 | .mode = 0644, | |
678 | .proc_handler = proc_dointvec | |
679 | }, | |
36e31b0a AP |
680 | { |
681 | .procname = "tcp_thin_linear_timeouts", | |
682 | .data = &sysctl_tcp_thin_linear_timeouts, | |
683 | .maxlen = sizeof(int), | |
684 | .mode = 0644, | |
685 | .proc_handler = proc_dointvec | |
686 | }, | |
7e380175 AP |
687 | { |
688 | .procname = "tcp_thin_dupack", | |
689 | .data = &sysctl_tcp_thin_dupack, | |
690 | .maxlen = sizeof(int), | |
691 | .mode = 0644, | |
692 | .proc_handler = proc_dointvec | |
693 | }, | |
eed530b6 YC |
694 | { |
695 | .procname = "tcp_early_retrans", | |
696 | .data = &sysctl_tcp_early_retrans, | |
697 | .maxlen = sizeof(int), | |
698 | .mode = 0644, | |
699 | .proc_handler = proc_dointvec_minmax, | |
700 | .extra1 = &zero, | |
701 | .extra2 = &two, | |
702 | }, | |
95766fff | 703 | { |
95766fff HA |
704 | .procname = "udp_mem", |
705 | .data = &sysctl_udp_mem, | |
706 | .maxlen = sizeof(sysctl_udp_mem), | |
707 | .mode = 0644, | |
8d987e5c | 708 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
709 | }, |
710 | { | |
95766fff HA |
711 | .procname = "udp_rmem_min", |
712 | .data = &sysctl_udp_rmem_min, | |
713 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
714 | .mode = 0644, | |
6d9f239a | 715 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
716 | .extra1 = &zero |
717 | }, | |
718 | { | |
95766fff HA |
719 | .procname = "udp_wmem_min", |
720 | .data = &sysctl_udp_wmem_min, | |
721 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
722 | .mode = 0644, | |
6d9f239a | 723 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
724 | .extra1 = &zero |
725 | }, | |
f8572d8f | 726 | { } |
1da177e4 | 727 | }; |
3e37c3f9 | 728 | |
68528f09 PE |
729 | static struct ctl_table ipv4_net_table[] = { |
730 | { | |
68528f09 PE |
731 | .procname = "icmp_echo_ignore_all", |
732 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
733 | .maxlen = sizeof(int), | |
734 | .mode = 0644, | |
6d9f239a | 735 | .proc_handler = proc_dointvec |
68528f09 PE |
736 | }, |
737 | { | |
68528f09 PE |
738 | .procname = "icmp_echo_ignore_broadcasts", |
739 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
740 | .maxlen = sizeof(int), | |
741 | .mode = 0644, | |
6d9f239a | 742 | .proc_handler = proc_dointvec |
68528f09 PE |
743 | }, |
744 | { | |
68528f09 PE |
745 | .procname = "icmp_ignore_bogus_error_responses", |
746 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
747 | .maxlen = sizeof(int), | |
748 | .mode = 0644, | |
6d9f239a | 749 | .proc_handler = proc_dointvec |
68528f09 PE |
750 | }, |
751 | { | |
68528f09 PE |
752 | .procname = "icmp_errors_use_inbound_ifaddr", |
753 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
754 | .maxlen = sizeof(int), | |
755 | .mode = 0644, | |
6d9f239a | 756 | .proc_handler = proc_dointvec |
68528f09 PE |
757 | }, |
758 | { | |
68528f09 PE |
759 | .procname = "icmp_ratelimit", |
760 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
761 | .maxlen = sizeof(int), | |
762 | .mode = 0644, | |
6d9f239a | 763 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
764 | }, |
765 | { | |
68528f09 PE |
766 | .procname = "icmp_ratemask", |
767 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
768 | .maxlen = sizeof(int), | |
769 | .mode = 0644, | |
6d9f239a | 770 | .proc_handler = proc_dointvec |
68528f09 | 771 | }, |
1080d709 | 772 | { |
1080d709 NH |
773 | .procname = "rt_cache_rebuild_count", |
774 | .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, | |
775 | .maxlen = sizeof(int), | |
776 | .mode = 0644, | |
6d9f239a | 777 | .proc_handler = proc_dointvec |
1080d709 | 778 | }, |
c319b4d7 VK |
779 | { |
780 | .procname = "ping_group_range", | |
781 | .data = &init_net.ipv4.sysctl_ping_group_range, | |
782 | .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range), | |
783 | .mode = 0644, | |
784 | .proc_handler = ipv4_ping_group_range, | |
785 | }, | |
3dc43e3e GC |
786 | { |
787 | .procname = "tcp_mem", | |
788 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_mem), | |
789 | .mode = 0644, | |
790 | .proc_handler = ipv4_tcp_mem, | |
791 | }, | |
68528f09 PE |
792 | { } |
793 | }; | |
794 | ||
1577519d PE |
795 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
796 | { | |
68528f09 PE |
797 | struct ctl_table *table; |
798 | ||
799 | table = ipv4_net_table; | |
09ad9bc7 | 800 | if (!net_eq(net, &init_net)) { |
68528f09 PE |
801 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
802 | if (table == NULL) | |
803 | goto err_alloc; | |
804 | ||
805 | table[0].data = | |
806 | &net->ipv4.sysctl_icmp_echo_ignore_all; | |
807 | table[1].data = | |
808 | &net->ipv4.sysctl_icmp_echo_ignore_broadcasts; | |
809 | table[2].data = | |
810 | &net->ipv4.sysctl_icmp_ignore_bogus_error_responses; | |
811 | table[3].data = | |
812 | &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr; | |
813 | table[4].data = | |
814 | &net->ipv4.sysctl_icmp_ratelimit; | |
815 | table[5].data = | |
816 | &net->ipv4.sysctl_icmp_ratemask; | |
1080d709 NH |
817 | table[6].data = |
818 | &net->ipv4.sysctl_rt_cache_rebuild_count; | |
c319b4d7 VK |
819 | table[7].data = |
820 | &net->ipv4.sysctl_ping_group_range; | |
821 | ||
68528f09 PE |
822 | } |
823 | ||
c319b4d7 VK |
824 | /* |
825 | * Sane defaults - nobody may create ping sockets. | |
826 | * Boot scripts should set this to distro-specific group. | |
827 | */ | |
828 | net->ipv4.sysctl_ping_group_range[0] = 1; | |
829 | net->ipv4.sysctl_ping_group_range[1] = 0; | |
830 | ||
1080d709 NH |
831 | net->ipv4.sysctl_rt_cache_rebuild_count = 4; |
832 | ||
4acb4190 | 833 | tcp_init_mem(net); |
3dc43e3e | 834 | |
ec8f23ce | 835 | net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); |
68528f09 PE |
836 | if (net->ipv4.ipv4_hdr == NULL) |
837 | goto err_reg; | |
838 | ||
1577519d | 839 | return 0; |
68528f09 PE |
840 | |
841 | err_reg: | |
09ad9bc7 | 842 | if (!net_eq(net, &init_net)) |
68528f09 PE |
843 | kfree(table); |
844 | err_alloc: | |
845 | return -ENOMEM; | |
1577519d PE |
846 | } |
847 | ||
848 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
849 | { | |
68528f09 PE |
850 | struct ctl_table *table; |
851 | ||
852 | table = net->ipv4.ipv4_hdr->ctl_table_arg; | |
853 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
854 | kfree(table); | |
1577519d PE |
855 | } |
856 | ||
857 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
858 | .init = ipv4_sysctl_init_net, | |
859 | .exit = ipv4_sysctl_exit_net, | |
860 | }; | |
861 | ||
3e37c3f9 PE |
862 | static __init int sysctl_ipv4_init(void) |
863 | { | |
864 | struct ctl_table_header *hdr; | |
e3826f1e AW |
865 | struct ctl_table *i; |
866 | ||
867 | for (i = ipv4_table; i->procname; i++) { | |
868 | if (strcmp(i->procname, "ip_local_reserved_ports") == 0) { | |
869 | i->data = sysctl_local_reserved_ports; | |
870 | break; | |
871 | } | |
872 | } | |
873 | if (!i->procname) | |
874 | return -EINVAL; | |
3e37c3f9 | 875 | |
ec8f23ce | 876 | hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); |
1577519d PE |
877 | if (hdr == NULL) |
878 | return -ENOMEM; | |
879 | ||
880 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
5dd3df10 | 881 | unregister_net_sysctl_table(hdr); |
1577519d PE |
882 | return -ENOMEM; |
883 | } | |
884 | ||
885 | return 0; | |
3e37c3f9 PE |
886 | } |
887 | ||
888 | __initcall(sysctl_ipv4_init); |