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Commit | Line | Data |
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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; |
e905a9ed | 30 | static int tcp_retr1_max = 255; |
1da177e4 LT |
31 | static int ip_local_port_range_min[] = { 1, 1 }; |
32 | static int ip_local_port_range_max[] = { 65535, 65535 }; | |
0147fc05 AD |
33 | static int tcp_adv_win_scale_min = -31; |
34 | static int tcp_adv_win_scale_max = 31; | |
249fab77 ED |
35 | static int ip_ttl_min = 1; |
36 | static int ip_ttl_max = 255; | |
c319b4d7 VK |
37 | static int ip_ping_group_range_min[] = { 0, 0 }; |
38 | static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; | |
1da177e4 | 39 | |
227b60f5 SH |
40 | /* Update system visible IP port range */ |
41 | static void set_local_port_range(int range[2]) | |
42 | { | |
3c689b73 ED |
43 | write_seqlock(&sysctl_local_ports.lock); |
44 | sysctl_local_ports.range[0] = range[0]; | |
45 | sysctl_local_ports.range[1] = range[1]; | |
46 | write_sequnlock(&sysctl_local_ports.lock); | |
227b60f5 SH |
47 | } |
48 | ||
49 | /* Validate changes from /proc interface. */ | |
8d65af78 | 50 | static int ipv4_local_port_range(ctl_table *table, int write, |
227b60f5 SH |
51 | void __user *buffer, |
52 | size_t *lenp, loff_t *ppos) | |
53 | { | |
54 | int ret; | |
3c689b73 | 55 | int range[2]; |
227b60f5 SH |
56 | ctl_table tmp = { |
57 | .data = &range, | |
58 | .maxlen = sizeof(range), | |
59 | .mode = table->mode, | |
60 | .extra1 = &ip_local_port_range_min, | |
61 | .extra2 = &ip_local_port_range_max, | |
62 | }; | |
63 | ||
3c689b73 | 64 | inet_get_local_port_range(range, range + 1); |
8d65af78 | 65 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
227b60f5 SH |
66 | |
67 | if (write && ret == 0) { | |
a25de534 | 68 | if (range[1] < range[0]) |
227b60f5 SH |
69 | ret = -EINVAL; |
70 | else | |
71 | set_local_port_range(range); | |
72 | } | |
73 | ||
74 | return ret; | |
75 | } | |
76 | ||
c319b4d7 | 77 | |
e6560d4d | 78 | static void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high) |
c319b4d7 VK |
79 | { |
80 | gid_t *data = table->data; | |
81 | unsigned seq; | |
82 | do { | |
83 | seq = read_seqbegin(&sysctl_local_ports.lock); | |
84 | ||
85 | *low = data[0]; | |
86 | *high = data[1]; | |
87 | } while (read_seqretry(&sysctl_local_ports.lock, seq)); | |
88 | } | |
89 | ||
90 | /* Update system visible IP port range */ | |
e6560d4d | 91 | static void set_ping_group_range(struct ctl_table *table, gid_t range[2]) |
c319b4d7 VK |
92 | { |
93 | gid_t *data = table->data; | |
94 | write_seqlock(&sysctl_local_ports.lock); | |
95 | data[0] = range[0]; | |
96 | data[1] = range[1]; | |
97 | write_sequnlock(&sysctl_local_ports.lock); | |
98 | } | |
99 | ||
100 | /* Validate changes from /proc interface. */ | |
101 | static int ipv4_ping_group_range(ctl_table *table, int write, | |
102 | void __user *buffer, | |
103 | size_t *lenp, loff_t *ppos) | |
104 | { | |
105 | int ret; | |
106 | gid_t range[2]; | |
107 | ctl_table tmp = { | |
108 | .data = &range, | |
109 | .maxlen = sizeof(range), | |
110 | .mode = table->mode, | |
111 | .extra1 = &ip_ping_group_range_min, | |
112 | .extra2 = &ip_ping_group_range_max, | |
113 | }; | |
114 | ||
115 | inet_get_ping_group_range_table(table, range, range + 1); | |
116 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
117 | ||
118 | if (write && ret == 0) | |
119 | set_ping_group_range(table, range); | |
120 | ||
121 | return ret; | |
122 | } | |
123 | ||
8d65af78 | 124 | static int proc_tcp_congestion_control(ctl_table *ctl, int write, |
317a76f9 SH |
125 | void __user *buffer, size_t *lenp, loff_t *ppos) |
126 | { | |
127 | char val[TCP_CA_NAME_MAX]; | |
128 | ctl_table tbl = { | |
129 | .data = val, | |
130 | .maxlen = TCP_CA_NAME_MAX, | |
131 | }; | |
132 | int ret; | |
133 | ||
134 | tcp_get_default_congestion_control(val); | |
135 | ||
8d65af78 | 136 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
317a76f9 SH |
137 | if (write && ret == 0) |
138 | ret = tcp_set_default_congestion_control(val); | |
139 | return ret; | |
140 | } | |
141 | ||
3ff825b2 | 142 | static int proc_tcp_available_congestion_control(ctl_table *ctl, |
8d65af78 | 143 | int write, |
3ff825b2 SH |
144 | void __user *buffer, size_t *lenp, |
145 | loff_t *ppos) | |
146 | { | |
147 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; | |
148 | int ret; | |
149 | ||
150 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
151 | if (!tbl.data) | |
152 | return -ENOMEM; | |
153 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
8d65af78 | 154 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
3ff825b2 SH |
155 | kfree(tbl.data); |
156 | return ret; | |
157 | } | |
158 | ||
ce7bc3bf | 159 | static int proc_allowed_congestion_control(ctl_table *ctl, |
8d65af78 | 160 | int write, |
ce7bc3bf SH |
161 | void __user *buffer, size_t *lenp, |
162 | loff_t *ppos) | |
163 | { | |
164 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; | |
165 | int ret; | |
166 | ||
167 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
168 | if (!tbl.data) | |
169 | return -ENOMEM; | |
170 | ||
171 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
8d65af78 | 172 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
ce7bc3bf SH |
173 | if (write && ret == 0) |
174 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
175 | kfree(tbl.data); | |
176 | return ret; | |
177 | } | |
178 | ||
3dc43e3e GC |
179 | static int ipv4_tcp_mem(ctl_table *ctl, int write, |
180 | void __user *buffer, size_t *lenp, | |
181 | loff_t *ppos) | |
182 | { | |
183 | int ret; | |
184 | unsigned long vec[3]; | |
185 | struct net *net = current->nsproxy->net_ns; | |
3aaabe23 GC |
186 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM |
187 | struct mem_cgroup *memcg; | |
188 | #endif | |
3dc43e3e GC |
189 | |
190 | ctl_table tmp = { | |
191 | .data = &vec, | |
192 | .maxlen = sizeof(vec), | |
193 | .mode = ctl->mode, | |
194 | }; | |
195 | ||
196 | if (!write) { | |
197 | ctl->data = &net->ipv4.sysctl_tcp_mem; | |
198 | return proc_doulongvec_minmax(ctl, write, buffer, lenp, ppos); | |
199 | } | |
200 | ||
201 | ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos); | |
202 | if (ret) | |
203 | return ret; | |
204 | ||
3aaabe23 GC |
205 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM |
206 | rcu_read_lock(); | |
207 | memcg = mem_cgroup_from_task(current); | |
208 | ||
209 | tcp_prot_mem(memcg, vec[0], 0); | |
210 | tcp_prot_mem(memcg, vec[1], 1); | |
211 | tcp_prot_mem(memcg, vec[2], 2); | |
212 | rcu_read_unlock(); | |
213 | #endif | |
214 | ||
3dc43e3e GC |
215 | net->ipv4.sysctl_tcp_mem[0] = vec[0]; |
216 | net->ipv4.sysctl_tcp_mem[1] = vec[1]; | |
217 | net->ipv4.sysctl_tcp_mem[2] = vec[2]; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
3e37c3f9 | 222 | static struct ctl_table ipv4_table[] = { |
e905a9ed | 223 | { |
1da177e4 LT |
224 | .procname = "tcp_timestamps", |
225 | .data = &sysctl_tcp_timestamps, | |
226 | .maxlen = sizeof(int), | |
227 | .mode = 0644, | |
6d9f239a | 228 | .proc_handler = proc_dointvec |
1da177e4 | 229 | }, |
e905a9ed | 230 | { |
1da177e4 LT |
231 | .procname = "tcp_window_scaling", |
232 | .data = &sysctl_tcp_window_scaling, | |
233 | .maxlen = sizeof(int), | |
234 | .mode = 0644, | |
6d9f239a | 235 | .proc_handler = proc_dointvec |
1da177e4 | 236 | }, |
e905a9ed | 237 | { |
1da177e4 LT |
238 | .procname = "tcp_sack", |
239 | .data = &sysctl_tcp_sack, | |
240 | .maxlen = sizeof(int), | |
241 | .mode = 0644, | |
6d9f239a | 242 | .proc_handler = proc_dointvec |
1da177e4 | 243 | }, |
e905a9ed | 244 | { |
1da177e4 LT |
245 | .procname = "tcp_retrans_collapse", |
246 | .data = &sysctl_tcp_retrans_collapse, | |
247 | .maxlen = sizeof(int), | |
248 | .mode = 0644, | |
6d9f239a | 249 | .proc_handler = proc_dointvec |
1da177e4 | 250 | }, |
e905a9ed | 251 | { |
1da177e4 | 252 | .procname = "ip_default_ttl", |
e905a9ed | 253 | .data = &sysctl_ip_default_ttl, |
1da177e4 LT |
254 | .maxlen = sizeof(int), |
255 | .mode = 0644, | |
249fab77 ED |
256 | .proc_handler = proc_dointvec_minmax, |
257 | .extra1 = &ip_ttl_min, | |
258 | .extra2 = &ip_ttl_max, | |
1da177e4 | 259 | }, |
e905a9ed | 260 | { |
1da177e4 LT |
261 | .procname = "ip_no_pmtu_disc", |
262 | .data = &ipv4_config.no_pmtu_disc, | |
263 | .maxlen = sizeof(int), | |
264 | .mode = 0644, | |
6d9f239a | 265 | .proc_handler = proc_dointvec |
1da177e4 LT |
266 | }, |
267 | { | |
1da177e4 LT |
268 | .procname = "ip_nonlocal_bind", |
269 | .data = &sysctl_ip_nonlocal_bind, | |
270 | .maxlen = sizeof(int), | |
271 | .mode = 0644, | |
6d9f239a | 272 | .proc_handler = proc_dointvec |
1da177e4 LT |
273 | }, |
274 | { | |
1da177e4 LT |
275 | .procname = "tcp_syn_retries", |
276 | .data = &sysctl_tcp_syn_retries, | |
277 | .maxlen = sizeof(int), | |
278 | .mode = 0644, | |
6d9f239a | 279 | .proc_handler = proc_dointvec |
1da177e4 LT |
280 | }, |
281 | { | |
1da177e4 LT |
282 | .procname = "tcp_synack_retries", |
283 | .data = &sysctl_tcp_synack_retries, | |
284 | .maxlen = sizeof(int), | |
285 | .mode = 0644, | |
6d9f239a | 286 | .proc_handler = proc_dointvec |
1da177e4 LT |
287 | }, |
288 | { | |
1da177e4 LT |
289 | .procname = "tcp_max_orphans", |
290 | .data = &sysctl_tcp_max_orphans, | |
291 | .maxlen = sizeof(int), | |
292 | .mode = 0644, | |
6d9f239a | 293 | .proc_handler = proc_dointvec |
1da177e4 LT |
294 | }, |
295 | { | |
1da177e4 | 296 | .procname = "tcp_max_tw_buckets", |
295ff7ed | 297 | .data = &tcp_death_row.sysctl_max_tw_buckets, |
1da177e4 LT |
298 | .maxlen = sizeof(int), |
299 | .mode = 0644, | |
6d9f239a | 300 | .proc_handler = proc_dointvec |
1da177e4 | 301 | }, |
1da177e4 | 302 | { |
1da177e4 LT |
303 | .procname = "ip_dynaddr", |
304 | .data = &sysctl_ip_dynaddr, | |
305 | .maxlen = sizeof(int), | |
306 | .mode = 0644, | |
6d9f239a | 307 | .proc_handler = proc_dointvec |
1da177e4 | 308 | }, |
1da177e4 | 309 | { |
1da177e4 LT |
310 | .procname = "tcp_keepalive_time", |
311 | .data = &sysctl_tcp_keepalive_time, | |
312 | .maxlen = sizeof(int), | |
313 | .mode = 0644, | |
6d9f239a | 314 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
315 | }, |
316 | { | |
1da177e4 LT |
317 | .procname = "tcp_keepalive_probes", |
318 | .data = &sysctl_tcp_keepalive_probes, | |
319 | .maxlen = sizeof(int), | |
320 | .mode = 0644, | |
6d9f239a | 321 | .proc_handler = proc_dointvec |
1da177e4 LT |
322 | }, |
323 | { | |
1da177e4 LT |
324 | .procname = "tcp_keepalive_intvl", |
325 | .data = &sysctl_tcp_keepalive_intvl, | |
326 | .maxlen = sizeof(int), | |
327 | .mode = 0644, | |
6d9f239a | 328 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
329 | }, |
330 | { | |
1da177e4 LT |
331 | .procname = "tcp_retries1", |
332 | .data = &sysctl_tcp_retries1, | |
333 | .maxlen = sizeof(int), | |
334 | .mode = 0644, | |
6d9f239a | 335 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
336 | .extra2 = &tcp_retr1_max |
337 | }, | |
338 | { | |
1da177e4 LT |
339 | .procname = "tcp_retries2", |
340 | .data = &sysctl_tcp_retries2, | |
341 | .maxlen = sizeof(int), | |
342 | .mode = 0644, | |
6d9f239a | 343 | .proc_handler = proc_dointvec |
1da177e4 LT |
344 | }, |
345 | { | |
1da177e4 LT |
346 | .procname = "tcp_fin_timeout", |
347 | .data = &sysctl_tcp_fin_timeout, | |
348 | .maxlen = sizeof(int), | |
349 | .mode = 0644, | |
6d9f239a | 350 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
351 | }, |
352 | #ifdef CONFIG_SYN_COOKIES | |
353 | { | |
1da177e4 LT |
354 | .procname = "tcp_syncookies", |
355 | .data = &sysctl_tcp_syncookies, | |
356 | .maxlen = sizeof(int), | |
357 | .mode = 0644, | |
6d9f239a | 358 | .proc_handler = proc_dointvec |
1da177e4 LT |
359 | }, |
360 | #endif | |
361 | { | |
1da177e4 | 362 | .procname = "tcp_tw_recycle", |
295ff7ed | 363 | .data = &tcp_death_row.sysctl_tw_recycle, |
1da177e4 LT |
364 | .maxlen = sizeof(int), |
365 | .mode = 0644, | |
6d9f239a | 366 | .proc_handler = proc_dointvec |
1da177e4 LT |
367 | }, |
368 | { | |
1da177e4 LT |
369 | .procname = "tcp_abort_on_overflow", |
370 | .data = &sysctl_tcp_abort_on_overflow, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
6d9f239a | 373 | .proc_handler = proc_dointvec |
1da177e4 LT |
374 | }, |
375 | { | |
1da177e4 LT |
376 | .procname = "tcp_stdurg", |
377 | .data = &sysctl_tcp_stdurg, | |
378 | .maxlen = sizeof(int), | |
379 | .mode = 0644, | |
6d9f239a | 380 | .proc_handler = proc_dointvec |
1da177e4 LT |
381 | }, |
382 | { | |
1da177e4 LT |
383 | .procname = "tcp_rfc1337", |
384 | .data = &sysctl_tcp_rfc1337, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
6d9f239a | 387 | .proc_handler = proc_dointvec |
1da177e4 LT |
388 | }, |
389 | { | |
1da177e4 LT |
390 | .procname = "tcp_max_syn_backlog", |
391 | .data = &sysctl_max_syn_backlog, | |
392 | .maxlen = sizeof(int), | |
393 | .mode = 0644, | |
6d9f239a | 394 | .proc_handler = proc_dointvec |
1da177e4 LT |
395 | }, |
396 | { | |
1da177e4 | 397 | .procname = "ip_local_port_range", |
3c689b73 ED |
398 | .data = &sysctl_local_ports.range, |
399 | .maxlen = sizeof(sysctl_local_ports.range), | |
1da177e4 | 400 | .mode = 0644, |
6d9f239a | 401 | .proc_handler = ipv4_local_port_range, |
1da177e4 | 402 | }, |
e3826f1e AW |
403 | { |
404 | .procname = "ip_local_reserved_ports", | |
405 | .data = NULL, /* initialized in sysctl_ipv4_init */ | |
406 | .maxlen = 65536, | |
407 | .mode = 0644, | |
408 | .proc_handler = proc_do_large_bitmap, | |
409 | }, | |
1da177e4 | 410 | { |
1da177e4 LT |
411 | .procname = "igmp_max_memberships", |
412 | .data = &sysctl_igmp_max_memberships, | |
413 | .maxlen = sizeof(int), | |
414 | .mode = 0644, | |
6d9f239a | 415 | .proc_handler = proc_dointvec |
1da177e4 | 416 | }, |
1da177e4 | 417 | { |
1da177e4 LT |
418 | .procname = "igmp_max_msf", |
419 | .data = &sysctl_igmp_max_msf, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
6d9f239a | 422 | .proc_handler = proc_dointvec |
1da177e4 LT |
423 | }, |
424 | { | |
1da177e4 LT |
425 | .procname = "inet_peer_threshold", |
426 | .data = &inet_peer_threshold, | |
427 | .maxlen = sizeof(int), | |
428 | .mode = 0644, | |
6d9f239a | 429 | .proc_handler = proc_dointvec |
1da177e4 LT |
430 | }, |
431 | { | |
1da177e4 LT |
432 | .procname = "inet_peer_minttl", |
433 | .data = &inet_peer_minttl, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
6d9f239a | 436 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
437 | }, |
438 | { | |
1da177e4 LT |
439 | .procname = "inet_peer_maxttl", |
440 | .data = &inet_peer_maxttl, | |
441 | .maxlen = sizeof(int), | |
442 | .mode = 0644, | |
6d9f239a | 443 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 | 444 | }, |
1da177e4 | 445 | { |
1da177e4 LT |
446 | .procname = "tcp_orphan_retries", |
447 | .data = &sysctl_tcp_orphan_retries, | |
448 | .maxlen = sizeof(int), | |
449 | .mode = 0644, | |
6d9f239a | 450 | .proc_handler = proc_dointvec |
1da177e4 LT |
451 | }, |
452 | { | |
1da177e4 LT |
453 | .procname = "tcp_fack", |
454 | .data = &sysctl_tcp_fack, | |
455 | .maxlen = sizeof(int), | |
456 | .mode = 0644, | |
6d9f239a | 457 | .proc_handler = proc_dointvec |
1da177e4 LT |
458 | }, |
459 | { | |
1da177e4 LT |
460 | .procname = "tcp_reordering", |
461 | .data = &sysctl_tcp_reordering, | |
462 | .maxlen = sizeof(int), | |
463 | .mode = 0644, | |
6d9f239a | 464 | .proc_handler = proc_dointvec |
1da177e4 LT |
465 | }, |
466 | { | |
1da177e4 LT |
467 | .procname = "tcp_ecn", |
468 | .data = &sysctl_tcp_ecn, | |
469 | .maxlen = sizeof(int), | |
470 | .mode = 0644, | |
6d9f239a | 471 | .proc_handler = proc_dointvec |
1da177e4 LT |
472 | }, |
473 | { | |
1da177e4 LT |
474 | .procname = "tcp_dsack", |
475 | .data = &sysctl_tcp_dsack, | |
476 | .maxlen = sizeof(int), | |
477 | .mode = 0644, | |
6d9f239a | 478 | .proc_handler = proc_dointvec |
1da177e4 | 479 | }, |
1da177e4 | 480 | { |
1da177e4 LT |
481 | .procname = "tcp_wmem", |
482 | .data = &sysctl_tcp_wmem, | |
483 | .maxlen = sizeof(sysctl_tcp_wmem), | |
484 | .mode = 0644, | |
6d9f239a | 485 | .proc_handler = proc_dointvec |
1da177e4 LT |
486 | }, |
487 | { | |
1da177e4 LT |
488 | .procname = "tcp_rmem", |
489 | .data = &sysctl_tcp_rmem, | |
490 | .maxlen = sizeof(sysctl_tcp_rmem), | |
491 | .mode = 0644, | |
6d9f239a | 492 | .proc_handler = proc_dointvec |
1da177e4 LT |
493 | }, |
494 | { | |
1da177e4 LT |
495 | .procname = "tcp_app_win", |
496 | .data = &sysctl_tcp_app_win, | |
497 | .maxlen = sizeof(int), | |
498 | .mode = 0644, | |
6d9f239a | 499 | .proc_handler = proc_dointvec |
1da177e4 LT |
500 | }, |
501 | { | |
1da177e4 LT |
502 | .procname = "tcp_adv_win_scale", |
503 | .data = &sysctl_tcp_adv_win_scale, | |
504 | .maxlen = sizeof(int), | |
505 | .mode = 0644, | |
0147fc05 AD |
506 | .proc_handler = proc_dointvec_minmax, |
507 | .extra1 = &tcp_adv_win_scale_min, | |
508 | .extra2 = &tcp_adv_win_scale_max, | |
1da177e4 | 509 | }, |
1da177e4 | 510 | { |
1da177e4 LT |
511 | .procname = "tcp_tw_reuse", |
512 | .data = &sysctl_tcp_tw_reuse, | |
513 | .maxlen = sizeof(int), | |
514 | .mode = 0644, | |
6d9f239a | 515 | .proc_handler = proc_dointvec |
1da177e4 LT |
516 | }, |
517 | { | |
1da177e4 LT |
518 | .procname = "tcp_frto", |
519 | .data = &sysctl_tcp_frto, | |
520 | .maxlen = sizeof(int), | |
521 | .mode = 0644, | |
6d9f239a | 522 | .proc_handler = proc_dointvec |
1da177e4 | 523 | }, |
3cfe3baa | 524 | { |
3cfe3baa IJ |
525 | .procname = "tcp_frto_response", |
526 | .data = &sysctl_tcp_frto_response, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
6d9f239a | 529 | .proc_handler = proc_dointvec |
3cfe3baa | 530 | }, |
1da177e4 | 531 | { |
1da177e4 LT |
532 | .procname = "tcp_low_latency", |
533 | .data = &sysctl_tcp_low_latency, | |
534 | .maxlen = sizeof(int), | |
535 | .mode = 0644, | |
6d9f239a | 536 | .proc_handler = proc_dointvec |
1da177e4 | 537 | }, |
1da177e4 | 538 | { |
1da177e4 LT |
539 | .procname = "tcp_no_metrics_save", |
540 | .data = &sysctl_tcp_nometrics_save, | |
541 | .maxlen = sizeof(int), | |
542 | .mode = 0644, | |
6d9f239a | 543 | .proc_handler = proc_dointvec, |
1da177e4 | 544 | }, |
1da177e4 | 545 | { |
1da177e4 LT |
546 | .procname = "tcp_moderate_rcvbuf", |
547 | .data = &sysctl_tcp_moderate_rcvbuf, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
6d9f239a | 550 | .proc_handler = proc_dointvec, |
1da177e4 LT |
551 | }, |
552 | { | |
1da177e4 LT |
553 | .procname = "tcp_tso_win_divisor", |
554 | .data = &sysctl_tcp_tso_win_divisor, | |
555 | .maxlen = sizeof(int), | |
556 | .mode = 0644, | |
6d9f239a | 557 | .proc_handler = proc_dointvec, |
1da177e4 LT |
558 | }, |
559 | { | |
317a76f9 | 560 | .procname = "tcp_congestion_control", |
1da177e4 | 561 | .mode = 0644, |
317a76f9 | 562 | .maxlen = TCP_CA_NAME_MAX, |
6d9f239a | 563 | .proc_handler = proc_tcp_congestion_control, |
1da177e4 | 564 | }, |
9772efb9 | 565 | { |
9772efb9 SH |
566 | .procname = "tcp_abc", |
567 | .data = &sysctl_tcp_abc, | |
568 | .maxlen = sizeof(int), | |
569 | .mode = 0644, | |
6d9f239a | 570 | .proc_handler = proc_dointvec, |
9772efb9 | 571 | }, |
5d424d5a | 572 | { |
5d424d5a JH |
573 | .procname = "tcp_mtu_probing", |
574 | .data = &sysctl_tcp_mtu_probing, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
6d9f239a | 577 | .proc_handler = proc_dointvec, |
5d424d5a JH |
578 | }, |
579 | { | |
5d424d5a JH |
580 | .procname = "tcp_base_mss", |
581 | .data = &sysctl_tcp_base_mss, | |
582 | .maxlen = sizeof(int), | |
583 | .mode = 0644, | |
6d9f239a | 584 | .proc_handler = proc_dointvec, |
5d424d5a | 585 | }, |
e905a9ed | 586 | { |
15d99e02 RJ |
587 | .procname = "tcp_workaround_signed_windows", |
588 | .data = &sysctl_tcp_workaround_signed_windows, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d9f239a | 591 | .proc_handler = proc_dointvec |
15d99e02 | 592 | }, |
95937825 CL |
593 | #ifdef CONFIG_NET_DMA |
594 | { | |
95937825 CL |
595 | .procname = "tcp_dma_copybreak", |
596 | .data = &sysctl_tcp_dma_copybreak, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
6d9f239a | 599 | .proc_handler = proc_dointvec |
95937825 CL |
600 | }, |
601 | #endif | |
35089bb2 | 602 | { |
35089bb2 DM |
603 | .procname = "tcp_slow_start_after_idle", |
604 | .data = &sysctl_tcp_slow_start_after_idle, | |
605 | .maxlen = sizeof(int), | |
606 | .mode = 0644, | |
6d9f239a | 607 | .proc_handler = proc_dointvec |
35089bb2 | 608 | }, |
446fda4f PM |
609 | #ifdef CONFIG_NETLABEL |
610 | { | |
446fda4f PM |
611 | .procname = "cipso_cache_enable", |
612 | .data = &cipso_v4_cache_enabled, | |
613 | .maxlen = sizeof(int), | |
614 | .mode = 0644, | |
6d9f239a | 615 | .proc_handler = proc_dointvec, |
446fda4f PM |
616 | }, |
617 | { | |
446fda4f PM |
618 | .procname = "cipso_cache_bucket_size", |
619 | .data = &cipso_v4_cache_bucketsize, | |
620 | .maxlen = sizeof(int), | |
621 | .mode = 0644, | |
6d9f239a | 622 | .proc_handler = proc_dointvec, |
446fda4f PM |
623 | }, |
624 | { | |
446fda4f PM |
625 | .procname = "cipso_rbm_optfmt", |
626 | .data = &cipso_v4_rbm_optfmt, | |
627 | .maxlen = sizeof(int), | |
628 | .mode = 0644, | |
6d9f239a | 629 | .proc_handler = proc_dointvec, |
446fda4f PM |
630 | }, |
631 | { | |
446fda4f PM |
632 | .procname = "cipso_rbm_strictvalid", |
633 | .data = &cipso_v4_rbm_strictvalid, | |
634 | .maxlen = sizeof(int), | |
635 | .mode = 0644, | |
6d9f239a | 636 | .proc_handler = proc_dointvec, |
446fda4f PM |
637 | }, |
638 | #endif /* CONFIG_NETLABEL */ | |
3ff825b2 | 639 | { |
3ff825b2 SH |
640 | .procname = "tcp_available_congestion_control", |
641 | .maxlen = TCP_CA_BUF_MAX, | |
642 | .mode = 0444, | |
6d9f239a | 643 | .proc_handler = proc_tcp_available_congestion_control, |
3ff825b2 | 644 | }, |
ce7bc3bf | 645 | { |
ce7bc3bf SH |
646 | .procname = "tcp_allowed_congestion_control", |
647 | .maxlen = TCP_CA_BUF_MAX, | |
648 | .mode = 0644, | |
6d9f239a | 649 | .proc_handler = proc_allowed_congestion_control, |
ce7bc3bf | 650 | }, |
886236c1 | 651 | { |
886236c1 JH |
652 | .procname = "tcp_max_ssthresh", |
653 | .data = &sysctl_tcp_max_ssthresh, | |
654 | .maxlen = sizeof(int), | |
655 | .mode = 0644, | |
6d9f239a | 656 | .proc_handler = proc_dointvec, |
886236c1 | 657 | }, |
519855c5 | 658 | { |
519855c5 WAS |
659 | .procname = "tcp_cookie_size", |
660 | .data = &sysctl_tcp_cookie_size, | |
661 | .maxlen = sizeof(int), | |
662 | .mode = 0644, | |
663 | .proc_handler = proc_dointvec | |
664 | }, | |
36e31b0a AP |
665 | { |
666 | .procname = "tcp_thin_linear_timeouts", | |
667 | .data = &sysctl_tcp_thin_linear_timeouts, | |
668 | .maxlen = sizeof(int), | |
669 | .mode = 0644, | |
670 | .proc_handler = proc_dointvec | |
671 | }, | |
7e380175 AP |
672 | { |
673 | .procname = "tcp_thin_dupack", | |
674 | .data = &sysctl_tcp_thin_dupack, | |
675 | .maxlen = sizeof(int), | |
676 | .mode = 0644, | |
677 | .proc_handler = proc_dointvec | |
678 | }, | |
95766fff | 679 | { |
95766fff HA |
680 | .procname = "udp_mem", |
681 | .data = &sysctl_udp_mem, | |
682 | .maxlen = sizeof(sysctl_udp_mem), | |
683 | .mode = 0644, | |
8d987e5c | 684 | .proc_handler = proc_doulongvec_minmax, |
95766fff HA |
685 | }, |
686 | { | |
95766fff HA |
687 | .procname = "udp_rmem_min", |
688 | .data = &sysctl_udp_rmem_min, | |
689 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
690 | .mode = 0644, | |
6d9f239a | 691 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
692 | .extra1 = &zero |
693 | }, | |
694 | { | |
95766fff HA |
695 | .procname = "udp_wmem_min", |
696 | .data = &sysctl_udp_wmem_min, | |
697 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
698 | .mode = 0644, | |
6d9f239a | 699 | .proc_handler = proc_dointvec_minmax, |
95766fff HA |
700 | .extra1 = &zero |
701 | }, | |
f8572d8f | 702 | { } |
1da177e4 | 703 | }; |
3e37c3f9 | 704 | |
68528f09 PE |
705 | static struct ctl_table ipv4_net_table[] = { |
706 | { | |
68528f09 PE |
707 | .procname = "icmp_echo_ignore_all", |
708 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
709 | .maxlen = sizeof(int), | |
710 | .mode = 0644, | |
6d9f239a | 711 | .proc_handler = proc_dointvec |
68528f09 PE |
712 | }, |
713 | { | |
68528f09 PE |
714 | .procname = "icmp_echo_ignore_broadcasts", |
715 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
716 | .maxlen = sizeof(int), | |
717 | .mode = 0644, | |
6d9f239a | 718 | .proc_handler = proc_dointvec |
68528f09 PE |
719 | }, |
720 | { | |
68528f09 PE |
721 | .procname = "icmp_ignore_bogus_error_responses", |
722 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
723 | .maxlen = sizeof(int), | |
724 | .mode = 0644, | |
6d9f239a | 725 | .proc_handler = proc_dointvec |
68528f09 PE |
726 | }, |
727 | { | |
68528f09 PE |
728 | .procname = "icmp_errors_use_inbound_ifaddr", |
729 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
730 | .maxlen = sizeof(int), | |
731 | .mode = 0644, | |
6d9f239a | 732 | .proc_handler = proc_dointvec |
68528f09 PE |
733 | }, |
734 | { | |
68528f09 PE |
735 | .procname = "icmp_ratelimit", |
736 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
737 | .maxlen = sizeof(int), | |
738 | .mode = 0644, | |
6d9f239a | 739 | .proc_handler = proc_dointvec_ms_jiffies, |
68528f09 PE |
740 | }, |
741 | { | |
68528f09 PE |
742 | .procname = "icmp_ratemask", |
743 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
744 | .maxlen = sizeof(int), | |
745 | .mode = 0644, | |
6d9f239a | 746 | .proc_handler = proc_dointvec |
68528f09 | 747 | }, |
1080d709 | 748 | { |
1080d709 NH |
749 | .procname = "rt_cache_rebuild_count", |
750 | .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, | |
751 | .maxlen = sizeof(int), | |
752 | .mode = 0644, | |
6d9f239a | 753 | .proc_handler = proc_dointvec |
1080d709 | 754 | }, |
c319b4d7 VK |
755 | { |
756 | .procname = "ping_group_range", | |
757 | .data = &init_net.ipv4.sysctl_ping_group_range, | |
758 | .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range), | |
759 | .mode = 0644, | |
760 | .proc_handler = ipv4_ping_group_range, | |
761 | }, | |
3dc43e3e GC |
762 | { |
763 | .procname = "tcp_mem", | |
764 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_mem), | |
765 | .mode = 0644, | |
766 | .proc_handler = ipv4_tcp_mem, | |
767 | }, | |
68528f09 PE |
768 | { } |
769 | }; | |
770 | ||
3d7cc2ba | 771 | struct ctl_path net_ipv4_ctl_path[] = { |
f8572d8f EB |
772 | { .procname = "net", }, |
773 | { .procname = "ipv4", }, | |
3e37c3f9 PE |
774 | { }, |
775 | }; | |
3d7cc2ba | 776 | EXPORT_SYMBOL_GPL(net_ipv4_ctl_path); |
3e37c3f9 | 777 | |
1577519d PE |
778 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
779 | { | |
68528f09 PE |
780 | struct ctl_table *table; |
781 | ||
782 | table = ipv4_net_table; | |
09ad9bc7 | 783 | if (!net_eq(net, &init_net)) { |
68528f09 PE |
784 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); |
785 | if (table == NULL) | |
786 | goto err_alloc; | |
787 | ||
788 | table[0].data = | |
789 | &net->ipv4.sysctl_icmp_echo_ignore_all; | |
790 | table[1].data = | |
791 | &net->ipv4.sysctl_icmp_echo_ignore_broadcasts; | |
792 | table[2].data = | |
793 | &net->ipv4.sysctl_icmp_ignore_bogus_error_responses; | |
794 | table[3].data = | |
795 | &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr; | |
796 | table[4].data = | |
797 | &net->ipv4.sysctl_icmp_ratelimit; | |
798 | table[5].data = | |
799 | &net->ipv4.sysctl_icmp_ratemask; | |
1080d709 NH |
800 | table[6].data = |
801 | &net->ipv4.sysctl_rt_cache_rebuild_count; | |
c319b4d7 VK |
802 | table[7].data = |
803 | &net->ipv4.sysctl_ping_group_range; | |
804 | ||
68528f09 PE |
805 | } |
806 | ||
c319b4d7 VK |
807 | /* |
808 | * Sane defaults - nobody may create ping sockets. | |
809 | * Boot scripts should set this to distro-specific group. | |
810 | */ | |
811 | net->ipv4.sysctl_ping_group_range[0] = 1; | |
812 | net->ipv4.sysctl_ping_group_range[1] = 0; | |
813 | ||
1080d709 NH |
814 | net->ipv4.sysctl_rt_cache_rebuild_count = 4; |
815 | ||
4acb4190 | 816 | tcp_init_mem(net); |
3dc43e3e | 817 | |
68528f09 PE |
818 | net->ipv4.ipv4_hdr = register_net_sysctl_table(net, |
819 | net_ipv4_ctl_path, table); | |
820 | if (net->ipv4.ipv4_hdr == NULL) | |
821 | goto err_reg; | |
822 | ||
1577519d | 823 | return 0; |
68528f09 PE |
824 | |
825 | err_reg: | |
09ad9bc7 | 826 | if (!net_eq(net, &init_net)) |
68528f09 PE |
827 | kfree(table); |
828 | err_alloc: | |
829 | return -ENOMEM; | |
1577519d PE |
830 | } |
831 | ||
832 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
833 | { | |
68528f09 PE |
834 | struct ctl_table *table; |
835 | ||
836 | table = net->ipv4.ipv4_hdr->ctl_table_arg; | |
837 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
838 | kfree(table); | |
1577519d PE |
839 | } |
840 | ||
841 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
842 | .init = ipv4_sysctl_init_net, | |
843 | .exit = ipv4_sysctl_exit_net, | |
844 | }; | |
845 | ||
3e37c3f9 PE |
846 | static __init int sysctl_ipv4_init(void) |
847 | { | |
848 | struct ctl_table_header *hdr; | |
e3826f1e AW |
849 | struct ctl_table *i; |
850 | ||
851 | for (i = ipv4_table; i->procname; i++) { | |
852 | if (strcmp(i->procname, "ip_local_reserved_ports") == 0) { | |
853 | i->data = sysctl_local_reserved_ports; | |
854 | break; | |
855 | } | |
856 | } | |
857 | if (!i->procname) | |
858 | return -EINVAL; | |
3e37c3f9 | 859 | |
3d7cc2ba | 860 | hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table); |
1577519d PE |
861 | if (hdr == NULL) |
862 | return -ENOMEM; | |
863 | ||
864 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
865 | unregister_sysctl_table(hdr); | |
866 | return -ENOMEM; | |
867 | } | |
868 | ||
869 | return 0; | |
3e37c3f9 PE |
870 | } |
871 | ||
872 | __initcall(sysctl_ipv4_init); |