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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* -*- linux-c -*- |
3 | * sysctl_net_core.c: sysctl interface to net core subsystem. | |
4 | * | |
5 | * Begun April 1, 1996, Mike Shaver. | |
6 | * Added /proc/sys/net/core directory entry (empty =) ). [MS] | |
7 | */ | |
8 | ||
9 | #include <linux/mm.h> | |
10 | #include <linux/sysctl.h> | |
1da177e4 | 11 | #include <linux/module.h> |
20380731 | 12 | #include <linux/socket.h> |
a37ae408 | 13 | #include <linux/netdevice.h> |
3fff4c42 | 14 | #include <linux/ratelimit.h> |
fec5e652 | 15 | #include <linux/vmalloc.h> |
33eb9cfc | 16 | #include <linux/init.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
3fff4c42 | 18 | |
63d819ca | 19 | #include <net/ip.h> |
20380731 | 20 | #include <net/sock.h> |
c5c177b4 | 21 | #include <net/net_ratelimit.h> |
076bb0c8 | 22 | #include <net/busy_poll.h> |
6da7c8fc | 23 | #include <net/pkt_sched.h> |
1da177e4 | 24 | |
316cdaa1 | 25 | static int two = 2; |
9efd6a3c | 26 | static int three = 3; |
5aa3afe1 | 27 | static int int_3600 = 3600; |
b1cb59cf AK |
28 | static int min_sndbuf = SOCK_MIN_SNDBUF; |
29 | static int min_rcvbuf = SOCK_MIN_RCVBUF; | |
5f74f82e | 30 | static int max_skb_frags = MAX_SKB_FRAGS; |
fdadd049 DB |
31 | static long long_one __maybe_unused = 1; |
32 | static long long_max __maybe_unused = LONG_MAX; | |
cdda8891 | 33 | |
ba7a46f1 JP |
34 | static int net_msg_warn; /* Unused, but still a sysctl */ |
35 | ||
79134e6c ED |
36 | int sysctl_fb_tunnels_only_for_init_net __read_mostly = 0; |
37 | EXPORT_SYMBOL(sysctl_fb_tunnels_only_for_init_net); | |
38 | ||
856c395c CW |
39 | /* 0 - Keep current behavior: |
40 | * IPv4: inherit all current settings from init_net | |
41 | * IPv6: reset all settings to default | |
42 | * 1 - Both inherit all current settings from init_net | |
43 | * 2 - Both reset all settings to default | |
9efd6a3c | 44 | * 3 - Both inherit all settings from current netns |
856c395c CW |
45 | */ |
46 | int sysctl_devconf_inherit_init_net __read_mostly; | |
47 | EXPORT_SYMBOL(sysctl_devconf_inherit_init_net); | |
48 | ||
fec5e652 | 49 | #ifdef CONFIG_RPS |
fe2c6338 | 50 | static int rps_sock_flow_sysctl(struct ctl_table *table, int write, |
32927393 | 51 | void *buffer, size_t *lenp, loff_t *ppos) |
fec5e652 TH |
52 | { |
53 | unsigned int orig_size, size; | |
54 | int ret, i; | |
fe2c6338 | 55 | struct ctl_table tmp = { |
fec5e652 TH |
56 | .data = &size, |
57 | .maxlen = sizeof(size), | |
58 | .mode = table->mode | |
59 | }; | |
60 | struct rps_sock_flow_table *orig_sock_table, *sock_table; | |
61 | static DEFINE_MUTEX(sock_flow_mutex); | |
62 | ||
63 | mutex_lock(&sock_flow_mutex); | |
64 | ||
6e3f7faf ED |
65 | orig_sock_table = rcu_dereference_protected(rps_sock_flow_table, |
66 | lockdep_is_held(&sock_flow_mutex)); | |
fec5e652 TH |
67 | size = orig_size = orig_sock_table ? orig_sock_table->mask + 1 : 0; |
68 | ||
69 | ret = proc_dointvec(&tmp, write, buffer, lenp, ppos); | |
70 | ||
71 | if (write) { | |
72 | if (size) { | |
93c1af6c | 73 | if (size > 1<<29) { |
fec5e652 TH |
74 | /* Enforce limit to prevent overflow */ |
75 | mutex_unlock(&sock_flow_mutex); | |
76 | return -EINVAL; | |
77 | } | |
78 | size = roundup_pow_of_two(size); | |
79 | if (size != orig_size) { | |
80 | sock_table = | |
81 | vmalloc(RPS_SOCK_FLOW_TABLE_SIZE(size)); | |
82 | if (!sock_table) { | |
83 | mutex_unlock(&sock_flow_mutex); | |
84 | return -ENOMEM; | |
85 | } | |
567e4b79 | 86 | rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1; |
fec5e652 TH |
87 | sock_table->mask = size - 1; |
88 | } else | |
89 | sock_table = orig_sock_table; | |
90 | ||
91 | for (i = 0; i < size; i++) | |
92 | sock_table->ents[i] = RPS_NO_CPU; | |
93 | } else | |
94 | sock_table = NULL; | |
95 | ||
96 | if (sock_table != orig_sock_table) { | |
97 | rcu_assign_pointer(rps_sock_flow_table, sock_table); | |
13bfff25 | 98 | if (sock_table) { |
dc05360f ED |
99 | static_branch_inc(&rps_needed); |
100 | static_branch_inc(&rfs_needed); | |
13bfff25 | 101 | } |
adc9300e | 102 | if (orig_sock_table) { |
dc05360f ED |
103 | static_branch_dec(&rps_needed); |
104 | static_branch_dec(&rfs_needed); | |
adc9300e ED |
105 | synchronize_rcu(); |
106 | vfree(orig_sock_table); | |
107 | } | |
fec5e652 TH |
108 | } |
109 | } | |
110 | ||
111 | mutex_unlock(&sock_flow_mutex); | |
112 | ||
113 | return ret; | |
114 | } | |
115 | #endif /* CONFIG_RPS */ | |
116 | ||
99bbc707 WB |
117 | #ifdef CONFIG_NET_FLOW_LIMIT |
118 | static DEFINE_MUTEX(flow_limit_update_mutex); | |
119 | ||
fe2c6338 | 120 | static int flow_limit_cpu_sysctl(struct ctl_table *table, int write, |
32927393 | 121 | void *buffer, size_t *lenp, loff_t *ppos) |
99bbc707 WB |
122 | { |
123 | struct sd_flow_limit *cur; | |
124 | struct softnet_data *sd; | |
125 | cpumask_var_t mask; | |
126 | int i, len, ret = 0; | |
127 | ||
128 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
129 | return -ENOMEM; | |
130 | ||
131 | if (write) { | |
56965ac7 | 132 | ret = cpumask_parse(buffer, mask); |
99bbc707 WB |
133 | if (ret) |
134 | goto done; | |
135 | ||
136 | mutex_lock(&flow_limit_update_mutex); | |
137 | len = sizeof(*cur) + netdev_flow_limit_table_len; | |
138 | for_each_possible_cpu(i) { | |
139 | sd = &per_cpu(softnet_data, i); | |
140 | cur = rcu_dereference_protected(sd->flow_limit, | |
141 | lockdep_is_held(&flow_limit_update_mutex)); | |
142 | if (cur && !cpumask_test_cpu(i, mask)) { | |
143 | RCU_INIT_POINTER(sd->flow_limit, NULL); | |
144 | synchronize_rcu(); | |
145 | kfree(cur); | |
146 | } else if (!cur && cpumask_test_cpu(i, mask)) { | |
5b59d467 ED |
147 | cur = kzalloc_node(len, GFP_KERNEL, |
148 | cpu_to_node(i)); | |
99bbc707 WB |
149 | if (!cur) { |
150 | /* not unwinding previous changes */ | |
151 | ret = -ENOMEM; | |
152 | goto write_unlock; | |
153 | } | |
154 | cur->num_buckets = netdev_flow_limit_table_len; | |
155 | rcu_assign_pointer(sd->flow_limit, cur); | |
156 | } | |
157 | } | |
158 | write_unlock: | |
159 | mutex_unlock(&flow_limit_update_mutex); | |
160 | } else { | |
5f121b9a WB |
161 | char kbuf[128]; |
162 | ||
99bbc707 WB |
163 | if (*ppos || !*lenp) { |
164 | *lenp = 0; | |
165 | goto done; | |
166 | } | |
167 | ||
168 | cpumask_clear(mask); | |
169 | rcu_read_lock(); | |
170 | for_each_possible_cpu(i) { | |
171 | sd = &per_cpu(softnet_data, i); | |
172 | if (rcu_dereference(sd->flow_limit)) | |
173 | cpumask_set_cpu(i, mask); | |
174 | } | |
175 | rcu_read_unlock(); | |
176 | ||
5f121b9a | 177 | len = min(sizeof(kbuf) - 1, *lenp); |
f0906827 | 178 | len = scnprintf(kbuf, len, "%*pb", cpumask_pr_args(mask)); |
5f121b9a WB |
179 | if (!len) { |
180 | *lenp = 0; | |
181 | goto done; | |
182 | } | |
183 | if (len < *lenp) | |
184 | kbuf[len++] = '\n'; | |
32927393 | 185 | memcpy(buffer, kbuf, len); |
5f121b9a WB |
186 | *lenp = len; |
187 | *ppos += len; | |
99bbc707 WB |
188 | } |
189 | ||
190 | done: | |
191 | free_cpumask_var(mask); | |
192 | return ret; | |
193 | } | |
194 | ||
fe2c6338 | 195 | static int flow_limit_table_len_sysctl(struct ctl_table *table, int write, |
32927393 | 196 | void *buffer, size_t *lenp, loff_t *ppos) |
99bbc707 WB |
197 | { |
198 | unsigned int old, *ptr; | |
199 | int ret; | |
200 | ||
201 | mutex_lock(&flow_limit_update_mutex); | |
202 | ||
203 | ptr = table->data; | |
204 | old = *ptr; | |
205 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
206 | if (!ret && write && !is_power_of_2(*ptr)) { | |
207 | *ptr = old; | |
208 | ret = -EINVAL; | |
209 | } | |
210 | ||
211 | mutex_unlock(&flow_limit_update_mutex); | |
212 | return ret; | |
213 | } | |
214 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
215 | ||
6da7c8fc | 216 | #ifdef CONFIG_NET_SCHED |
217 | static int set_default_qdisc(struct ctl_table *table, int write, | |
32927393 | 218 | void *buffer, size_t *lenp, loff_t *ppos) |
6da7c8fc | 219 | { |
220 | char id[IFNAMSIZ]; | |
221 | struct ctl_table tbl = { | |
222 | .data = id, | |
223 | .maxlen = IFNAMSIZ, | |
224 | }; | |
225 | int ret; | |
226 | ||
227 | qdisc_get_default(id, IFNAMSIZ); | |
228 | ||
229 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
230 | if (write && ret == 0) | |
231 | ret = qdisc_set_default(id); | |
232 | return ret; | |
233 | } | |
234 | #endif | |
235 | ||
3d48b53f | 236 | static int proc_do_dev_weight(struct ctl_table *table, int write, |
32927393 | 237 | void *buffer, size_t *lenp, loff_t *ppos) |
3d48b53f MT |
238 | { |
239 | int ret; | |
240 | ||
241 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
242 | if (ret != 0) | |
243 | return ret; | |
244 | ||
245 | dev_rx_weight = weight_p * dev_weight_rx_bias; | |
246 | dev_tx_weight = weight_p * dev_weight_tx_bias; | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
960fb622 | 251 | static int proc_do_rss_key(struct ctl_table *table, int write, |
32927393 | 252 | void *buffer, size_t *lenp, loff_t *ppos) |
960fb622 ED |
253 | { |
254 | struct ctl_table fake_table; | |
255 | char buf[NETDEV_RSS_KEY_LEN * 3]; | |
256 | ||
257 | snprintf(buf, sizeof(buf), "%*phC", NETDEV_RSS_KEY_LEN, netdev_rss_key); | |
258 | fake_table.data = buf; | |
259 | fake_table.maxlen = sizeof(buf); | |
260 | return proc_dostring(&fake_table, write, buffer, lenp, ppos); | |
261 | } | |
262 | ||
2e4a3098 DB |
263 | #ifdef CONFIG_BPF_JIT |
264 | static int proc_dointvec_minmax_bpf_enable(struct ctl_table *table, int write, | |
32927393 | 265 | void *buffer, size_t *lenp, |
2e4a3098 DB |
266 | loff_t *ppos) |
267 | { | |
268 | int ret, jit_enable = *(int *)table->data; | |
269 | struct ctl_table tmp = *table; | |
270 | ||
271 | if (write && !capable(CAP_SYS_ADMIN)) | |
272 | return -EPERM; | |
273 | ||
274 | tmp.data = &jit_enable; | |
275 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
276 | if (write && !ret) { | |
277 | if (jit_enable < 2 || | |
63960260 | 278 | (jit_enable == 2 && bpf_dump_raw_ok(current_cred()))) { |
2e4a3098 DB |
279 | *(int *)table->data = jit_enable; |
280 | if (jit_enable == 2) | |
281 | pr_warn("bpf_jit_enable = 2 was set! NEVER use this in production, only for JIT debugging!\n"); | |
282 | } else { | |
283 | ret = -EPERM; | |
284 | } | |
285 | } | |
286 | return ret; | |
287 | } | |
288 | ||
1148f9ad | 289 | # ifdef CONFIG_HAVE_EBPF_JIT |
2e4a3098 DB |
290 | static int |
291 | proc_dointvec_minmax_bpf_restricted(struct ctl_table *table, int write, | |
32927393 | 292 | void *buffer, size_t *lenp, loff_t *ppos) |
2e4a3098 DB |
293 | { |
294 | if (!capable(CAP_SYS_ADMIN)) | |
295 | return -EPERM; | |
296 | ||
297 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
298 | } | |
1148f9ad | 299 | # endif /* CONFIG_HAVE_EBPF_JIT */ |
fdadd049 DB |
300 | |
301 | static int | |
302 | proc_dolongvec_minmax_bpf_restricted(struct ctl_table *table, int write, | |
32927393 | 303 | void *buffer, size_t *lenp, loff_t *ppos) |
fdadd049 DB |
304 | { |
305 | if (!capable(CAP_SYS_ADMIN)) | |
306 | return -EPERM; | |
307 | ||
308 | return proc_doulongvec_minmax(table, write, buffer, lenp, ppos); | |
309 | } | |
2e4a3098 DB |
310 | #endif |
311 | ||
33eb9cfc | 312 | static struct ctl_table net_core_table[] = { |
1da177e4 | 313 | { |
1da177e4 LT |
314 | .procname = "wmem_max", |
315 | .data = &sysctl_wmem_max, | |
316 | .maxlen = sizeof(int), | |
317 | .mode = 0644, | |
cdda8891 | 318 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 319 | .extra1 = &min_sndbuf, |
1da177e4 LT |
320 | }, |
321 | { | |
1da177e4 LT |
322 | .procname = "rmem_max", |
323 | .data = &sysctl_rmem_max, | |
324 | .maxlen = sizeof(int), | |
325 | .mode = 0644, | |
cdda8891 | 326 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 327 | .extra1 = &min_rcvbuf, |
1da177e4 LT |
328 | }, |
329 | { | |
1da177e4 LT |
330 | .procname = "wmem_default", |
331 | .data = &sysctl_wmem_default, | |
332 | .maxlen = sizeof(int), | |
333 | .mode = 0644, | |
cdda8891 | 334 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 335 | .extra1 = &min_sndbuf, |
1da177e4 LT |
336 | }, |
337 | { | |
1da177e4 LT |
338 | .procname = "rmem_default", |
339 | .data = &sysctl_rmem_default, | |
340 | .maxlen = sizeof(int), | |
341 | .mode = 0644, | |
cdda8891 | 342 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 343 | .extra1 = &min_rcvbuf, |
1da177e4 LT |
344 | }, |
345 | { | |
1da177e4 LT |
346 | .procname = "dev_weight", |
347 | .data = &weight_p, | |
348 | .maxlen = sizeof(int), | |
349 | .mode = 0644, | |
3d48b53f MT |
350 | .proc_handler = proc_do_dev_weight, |
351 | }, | |
352 | { | |
353 | .procname = "dev_weight_rx_bias", | |
354 | .data = &dev_weight_rx_bias, | |
355 | .maxlen = sizeof(int), | |
356 | .mode = 0644, | |
357 | .proc_handler = proc_do_dev_weight, | |
358 | }, | |
359 | { | |
360 | .procname = "dev_weight_tx_bias", | |
361 | .data = &dev_weight_tx_bias, | |
362 | .maxlen = sizeof(int), | |
363 | .mode = 0644, | |
364 | .proc_handler = proc_do_dev_weight, | |
1da177e4 LT |
365 | }, |
366 | { | |
1da177e4 LT |
367 | .procname = "netdev_max_backlog", |
368 | .data = &netdev_max_backlog, | |
369 | .maxlen = sizeof(int), | |
370 | .mode = 0644, | |
6d9f239a | 371 | .proc_handler = proc_dointvec |
1da177e4 | 372 | }, |
960fb622 ED |
373 | { |
374 | .procname = "netdev_rss_key", | |
375 | .data = &netdev_rss_key, | |
376 | .maxlen = sizeof(int), | |
377 | .mode = 0444, | |
378 | .proc_handler = proc_do_rss_key, | |
379 | }, | |
0a14842f ED |
380 | #ifdef CONFIG_BPF_JIT |
381 | { | |
382 | .procname = "bpf_jit_enable", | |
383 | .data = &bpf_jit_enable, | |
384 | .maxlen = sizeof(int), | |
385 | .mode = 0644, | |
2e4a3098 | 386 | .proc_handler = proc_dointvec_minmax_bpf_enable, |
fa9dd599 | 387 | # ifdef CONFIG_BPF_JIT_ALWAYS_ON |
eec4844f MC |
388 | .extra1 = SYSCTL_ONE, |
389 | .extra2 = SYSCTL_ONE, | |
fa9dd599 | 390 | # else |
eec4844f | 391 | .extra1 = SYSCTL_ZERO, |
fa9dd599 DB |
392 | .extra2 = &two, |
393 | # endif | |
0a14842f | 394 | }, |
4f3446bb DB |
395 | # ifdef CONFIG_HAVE_EBPF_JIT |
396 | { | |
397 | .procname = "bpf_jit_harden", | |
398 | .data = &bpf_jit_harden, | |
399 | .maxlen = sizeof(int), | |
400 | .mode = 0600, | |
2e4a3098 | 401 | .proc_handler = proc_dointvec_minmax_bpf_restricted, |
eec4844f | 402 | .extra1 = SYSCTL_ZERO, |
fa9dd599 | 403 | .extra2 = &two, |
4f3446bb | 404 | }, |
74451e66 DB |
405 | { |
406 | .procname = "bpf_jit_kallsyms", | |
407 | .data = &bpf_jit_kallsyms, | |
408 | .maxlen = sizeof(int), | |
409 | .mode = 0600, | |
2e4a3098 | 410 | .proc_handler = proc_dointvec_minmax_bpf_restricted, |
eec4844f MC |
411 | .extra1 = SYSCTL_ZERO, |
412 | .extra2 = SYSCTL_ONE, | |
74451e66 | 413 | }, |
4f3446bb | 414 | # endif |
ede95a63 DB |
415 | { |
416 | .procname = "bpf_jit_limit", | |
417 | .data = &bpf_jit_limit, | |
fdadd049 | 418 | .maxlen = sizeof(long), |
ede95a63 | 419 | .mode = 0600, |
fdadd049 DB |
420 | .proc_handler = proc_dolongvec_minmax_bpf_restricted, |
421 | .extra1 = &long_one, | |
422 | .extra2 = &long_max, | |
ede95a63 | 423 | }, |
0a14842f | 424 | #endif |
3b098e2d ED |
425 | { |
426 | .procname = "netdev_tstamp_prequeue", | |
427 | .data = &netdev_tstamp_prequeue, | |
428 | .maxlen = sizeof(int), | |
429 | .mode = 0644, | |
430 | .proc_handler = proc_dointvec | |
431 | }, | |
1da177e4 | 432 | { |
1da177e4 | 433 | .procname = "message_cost", |
717115e1 | 434 | .data = &net_ratelimit_state.interval, |
1da177e4 LT |
435 | .maxlen = sizeof(int), |
436 | .mode = 0644, | |
6d9f239a | 437 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
438 | }, |
439 | { | |
1da177e4 | 440 | .procname = "message_burst", |
717115e1 | 441 | .data = &net_ratelimit_state.burst, |
1da177e4 LT |
442 | .maxlen = sizeof(int), |
443 | .mode = 0644, | |
6d9f239a | 444 | .proc_handler = proc_dointvec, |
1da177e4 LT |
445 | }, |
446 | { | |
1da177e4 LT |
447 | .procname = "optmem_max", |
448 | .data = &sysctl_optmem_max, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
6d9f239a | 451 | .proc_handler = proc_dointvec |
1da177e4 | 452 | }, |
b245be1f WB |
453 | { |
454 | .procname = "tstamp_allow_data", | |
455 | .data = &sysctl_tstamp_allow_data, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
458 | .proc_handler = proc_dointvec_minmax, | |
eec4844f MC |
459 | .extra1 = SYSCTL_ZERO, |
460 | .extra2 = SYSCTL_ONE | |
b245be1f | 461 | }, |
fec5e652 TH |
462 | #ifdef CONFIG_RPS |
463 | { | |
464 | .procname = "rps_sock_flow_entries", | |
465 | .maxlen = sizeof(int), | |
466 | .mode = 0644, | |
467 | .proc_handler = rps_sock_flow_sysctl | |
468 | }, | |
469 | #endif | |
99bbc707 WB |
470 | #ifdef CONFIG_NET_FLOW_LIMIT |
471 | { | |
472 | .procname = "flow_limit_cpu_bitmap", | |
473 | .mode = 0644, | |
474 | .proc_handler = flow_limit_cpu_sysctl | |
475 | }, | |
476 | { | |
477 | .procname = "flow_limit_table_len", | |
478 | .data = &netdev_flow_limit_table_len, | |
479 | .maxlen = sizeof(int), | |
480 | .mode = 0644, | |
481 | .proc_handler = flow_limit_table_len_sysctl | |
482 | }, | |
483 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
e0d1095a | 484 | #ifdef CONFIG_NET_RX_BUSY_POLL |
06021292 | 485 | { |
64b0dc51 ET |
486 | .procname = "busy_poll", |
487 | .data = &sysctl_net_busy_poll, | |
eb6db622 | 488 | .maxlen = sizeof(unsigned int), |
06021292 | 489 | .mode = 0644, |
95f25521 | 490 | .proc_handler = proc_dointvec_minmax, |
eec4844f | 491 | .extra1 = SYSCTL_ZERO, |
06021292 | 492 | }, |
2d48d67f | 493 | { |
64b0dc51 ET |
494 | .procname = "busy_read", |
495 | .data = &sysctl_net_busy_read, | |
2d48d67f ET |
496 | .maxlen = sizeof(unsigned int), |
497 | .mode = 0644, | |
95f25521 | 498 | .proc_handler = proc_dointvec_minmax, |
eec4844f | 499 | .extra1 = SYSCTL_ZERO, |
2d48d67f | 500 | }, |
6da7c8fc | 501 | #endif |
502 | #ifdef CONFIG_NET_SCHED | |
503 | { | |
504 | .procname = "default_qdisc", | |
505 | .mode = 0644, | |
506 | .maxlen = IFNAMSIZ, | |
507 | .proc_handler = set_default_qdisc | |
508 | }, | |
06021292 | 509 | #endif |
51b0bded | 510 | { |
51b0bded SH |
511 | .procname = "netdev_budget", |
512 | .data = &netdev_budget, | |
513 | .maxlen = sizeof(int), | |
514 | .mode = 0644, | |
6d9f239a | 515 | .proc_handler = proc_dointvec |
51b0bded | 516 | }, |
a2a316fd | 517 | { |
a2a316fd SH |
518 | .procname = "warnings", |
519 | .data = &net_msg_warn, | |
520 | .maxlen = sizeof(int), | |
521 | .mode = 0644, | |
6d9f239a | 522 | .proc_handler = proc_dointvec |
a2a316fd | 523 | }, |
5f74f82e HWR |
524 | { |
525 | .procname = "max_skb_frags", | |
526 | .data = &sysctl_max_skb_frags, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
529 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 530 | .extra1 = SYSCTL_ONE, |
5f74f82e HWR |
531 | .extra2 = &max_skb_frags, |
532 | }, | |
7acf8a1e MW |
533 | { |
534 | .procname = "netdev_budget_usecs", | |
535 | .data = &netdev_budget_usecs, | |
536 | .maxlen = sizeof(unsigned int), | |
537 | .mode = 0644, | |
538 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 539 | .extra1 = SYSCTL_ZERO, |
7acf8a1e | 540 | }, |
79134e6c ED |
541 | { |
542 | .procname = "fb_tunnels_only_for_init_net", | |
543 | .data = &sysctl_fb_tunnels_only_for_init_net, | |
544 | .maxlen = sizeof(int), | |
545 | .mode = 0644, | |
546 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 547 | .extra1 = SYSCTL_ZERO, |
316cdaa1 | 548 | .extra2 = &two, |
79134e6c | 549 | }, |
856c395c CW |
550 | { |
551 | .procname = "devconf_inherit_init_net", | |
552 | .data = &sysctl_devconf_inherit_init_net, | |
553 | .maxlen = sizeof(int), | |
554 | .mode = 0644, | |
555 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 556 | .extra1 = SYSCTL_ZERO, |
9efd6a3c | 557 | .extra2 = &three, |
856c395c | 558 | }, |
ce27ec60 ED |
559 | { |
560 | .procname = "high_order_alloc_disable", | |
561 | .data = &net_high_order_alloc_disable_key.key, | |
562 | .maxlen = sizeof(net_high_order_alloc_disable_key), | |
563 | .mode = 0644, | |
564 | .proc_handler = proc_do_static_key, | |
565 | }, | |
323ebb61 EC |
566 | { |
567 | .procname = "gro_normal_batch", | |
568 | .data = &gro_normal_batch, | |
569 | .maxlen = sizeof(unsigned int), | |
570 | .mode = 0644, | |
571 | .proc_handler = proc_dointvec_minmax, | |
572 | .extra1 = SYSCTL_ONE, | |
573 | }, | |
5aa3afe1 DV |
574 | { |
575 | .procname = "netdev_unregister_timeout_secs", | |
576 | .data = &netdev_unregister_timeout_secs, | |
577 | .maxlen = sizeof(unsigned int), | |
578 | .mode = 0644, | |
579 | .proc_handler = proc_dointvec_minmax, | |
6c996e19 | 580 | .extra1 = SYSCTL_ONE, |
5aa3afe1 DV |
581 | .extra2 = &int_3600, |
582 | }, | |
f8572d8f | 583 | { } |
1da177e4 | 584 | }; |
33eb9cfc | 585 | |
d5a4502e PE |
586 | static struct ctl_table netns_core_table[] = { |
587 | { | |
d5a4502e PE |
588 | .procname = "somaxconn", |
589 | .data = &init_net.core.sysctl_somaxconn, | |
590 | .maxlen = sizeof(int), | |
591 | .mode = 0644, | |
eec4844f | 592 | .extra1 = SYSCTL_ZERO, |
5f671d6b | 593 | .proc_handler = proc_dointvec_minmax |
d5a4502e | 594 | }, |
f8572d8f | 595 | { } |
d5a4502e PE |
596 | }; |
597 | ||
316cdaa1 MB |
598 | static int __init fb_tunnels_only_for_init_net_sysctl_setup(char *str) |
599 | { | |
600 | /* fallback tunnels for initns only */ | |
601 | if (!strncmp(str, "initns", 6)) | |
602 | sysctl_fb_tunnels_only_for_init_net = 1; | |
603 | /* no fallback tunnels anywhere */ | |
604 | else if (!strncmp(str, "none", 4)) | |
605 | sysctl_fb_tunnels_only_for_init_net = 2; | |
606 | ||
607 | return 1; | |
608 | } | |
609 | __setup("fb_tunnels=", fb_tunnels_only_for_init_net_sysctl_setup); | |
610 | ||
024626e3 | 611 | static __net_init int sysctl_core_net_init(struct net *net) |
33eb9cfc | 612 | { |
d5a4502e | 613 | struct ctl_table *tbl; |
024626e3 | 614 | |
d5a4502e | 615 | tbl = netns_core_table; |
09ad9bc7 | 616 | if (!net_eq(net, &init_net)) { |
d5a4502e | 617 | tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); |
024626e3 PE |
618 | if (tbl == NULL) |
619 | goto err_dup; | |
620 | ||
d5a4502e | 621 | tbl[0].data = &net->core.sysctl_somaxconn; |
464dc801 EB |
622 | |
623 | /* Don't export any sysctls to unprivileged users */ | |
624 | if (net->user_ns != &init_user_ns) { | |
625 | tbl[0].procname = NULL; | |
626 | } | |
024626e3 PE |
627 | } |
628 | ||
ec8f23ce | 629 | net->core.sysctl_hdr = register_net_sysctl(net, "net/core", tbl); |
8efa6e93 | 630 | if (net->core.sysctl_hdr == NULL) |
024626e3 | 631 | goto err_reg; |
33eb9cfc | 632 | |
024626e3 PE |
633 | return 0; |
634 | ||
635 | err_reg: | |
d5a4502e | 636 | if (tbl != netns_core_table) |
024626e3 PE |
637 | kfree(tbl); |
638 | err_dup: | |
639 | return -ENOMEM; | |
640 | } | |
641 | ||
642 | static __net_exit void sysctl_core_net_exit(struct net *net) | |
643 | { | |
644 | struct ctl_table *tbl; | |
645 | ||
8efa6e93 PE |
646 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
647 | unregister_net_sysctl_table(net->core.sysctl_hdr); | |
d5a4502e | 648 | BUG_ON(tbl == netns_core_table); |
024626e3 PE |
649 | kfree(tbl); |
650 | } | |
651 | ||
652 | static __net_initdata struct pernet_operations sysctl_core_ops = { | |
653 | .init = sysctl_core_net_init, | |
654 | .exit = sysctl_core_net_exit, | |
655 | }; | |
656 | ||
657 | static __init int sysctl_core_init(void) | |
658 | { | |
43444757 | 659 | register_net_sysctl(&init_net, "net/core", net_core_table); |
024626e3 | 660 | return register_pernet_subsys(&sysctl_core_ops); |
33eb9cfc PE |
661 | } |
662 | ||
b27aeadb | 663 | fs_initcall(sysctl_core_init); |