Commit | Line | Data |
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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 | ||
b6459415 | 9 | #include <linux/filter.h> |
1da177e4 LT |
10 | #include <linux/mm.h> |
11 | #include <linux/sysctl.h> | |
1da177e4 | 12 | #include <linux/module.h> |
20380731 | 13 | #include <linux/socket.h> |
a37ae408 | 14 | #include <linux/netdevice.h> |
3fff4c42 | 15 | #include <linux/ratelimit.h> |
fec5e652 | 16 | #include <linux/vmalloc.h> |
33eb9cfc | 17 | #include <linux/init.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
3fff4c42 | 19 | |
63d819ca | 20 | #include <net/ip.h> |
20380731 | 21 | #include <net/sock.h> |
c5c177b4 | 22 | #include <net/net_ratelimit.h> |
076bb0c8 | 23 | #include <net/busy_poll.h> |
6da7c8fc | 24 | #include <net/pkt_sched.h> |
1da177e4 | 25 | |
316cdaa1 | 26 | static int two = 2; |
9efd6a3c | 27 | static int three = 3; |
5aa3afe1 | 28 | static int int_3600 = 3600; |
b1cb59cf AK |
29 | static int min_sndbuf = SOCK_MIN_SNDBUF; |
30 | static int min_rcvbuf = SOCK_MIN_RCVBUF; | |
5f74f82e | 31 | static int max_skb_frags = MAX_SKB_FRAGS; |
fdadd049 DB |
32 | static long long_one __maybe_unused = 1; |
33 | static long long_max __maybe_unused = LONG_MAX; | |
cdda8891 | 34 | |
ba7a46f1 JP |
35 | static int net_msg_warn; /* Unused, but still a sysctl */ |
36 | ||
79134e6c ED |
37 | int sysctl_fb_tunnels_only_for_init_net __read_mostly = 0; |
38 | EXPORT_SYMBOL(sysctl_fb_tunnels_only_for_init_net); | |
39 | ||
856c395c CW |
40 | /* 0 - Keep current behavior: |
41 | * IPv4: inherit all current settings from init_net | |
42 | * IPv6: reset all settings to default | |
43 | * 1 - Both inherit all current settings from init_net | |
44 | * 2 - Both reset all settings to default | |
9efd6a3c | 45 | * 3 - Both inherit all settings from current netns |
856c395c CW |
46 | */ |
47 | int sysctl_devconf_inherit_init_net __read_mostly; | |
48 | EXPORT_SYMBOL(sysctl_devconf_inherit_init_net); | |
49 | ||
fec5e652 | 50 | #ifdef CONFIG_RPS |
fe2c6338 | 51 | static int rps_sock_flow_sysctl(struct ctl_table *table, int write, |
32927393 | 52 | void *buffer, size_t *lenp, loff_t *ppos) |
fec5e652 TH |
53 | { |
54 | unsigned int orig_size, size; | |
55 | int ret, i; | |
fe2c6338 | 56 | struct ctl_table tmp = { |
fec5e652 TH |
57 | .data = &size, |
58 | .maxlen = sizeof(size), | |
59 | .mode = table->mode | |
60 | }; | |
61 | struct rps_sock_flow_table *orig_sock_table, *sock_table; | |
62 | static DEFINE_MUTEX(sock_flow_mutex); | |
63 | ||
64 | mutex_lock(&sock_flow_mutex); | |
65 | ||
6e3f7faf ED |
66 | orig_sock_table = rcu_dereference_protected(rps_sock_flow_table, |
67 | lockdep_is_held(&sock_flow_mutex)); | |
fec5e652 TH |
68 | size = orig_size = orig_sock_table ? orig_sock_table->mask + 1 : 0; |
69 | ||
70 | ret = proc_dointvec(&tmp, write, buffer, lenp, ppos); | |
71 | ||
72 | if (write) { | |
73 | if (size) { | |
93c1af6c | 74 | if (size > 1<<29) { |
fec5e652 TH |
75 | /* Enforce limit to prevent overflow */ |
76 | mutex_unlock(&sock_flow_mutex); | |
77 | return -EINVAL; | |
78 | } | |
79 | size = roundup_pow_of_two(size); | |
80 | if (size != orig_size) { | |
81 | sock_table = | |
82 | vmalloc(RPS_SOCK_FLOW_TABLE_SIZE(size)); | |
83 | if (!sock_table) { | |
84 | mutex_unlock(&sock_flow_mutex); | |
85 | return -ENOMEM; | |
86 | } | |
567e4b79 | 87 | rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1; |
fec5e652 TH |
88 | sock_table->mask = size - 1; |
89 | } else | |
90 | sock_table = orig_sock_table; | |
91 | ||
92 | for (i = 0; i < size; i++) | |
93 | sock_table->ents[i] = RPS_NO_CPU; | |
94 | } else | |
95 | sock_table = NULL; | |
96 | ||
97 | if (sock_table != orig_sock_table) { | |
98 | rcu_assign_pointer(rps_sock_flow_table, sock_table); | |
13bfff25 | 99 | if (sock_table) { |
dc05360f ED |
100 | static_branch_inc(&rps_needed); |
101 | static_branch_inc(&rfs_needed); | |
13bfff25 | 102 | } |
adc9300e | 103 | if (orig_sock_table) { |
dc05360f ED |
104 | static_branch_dec(&rps_needed); |
105 | static_branch_dec(&rfs_needed); | |
adc9300e ED |
106 | synchronize_rcu(); |
107 | vfree(orig_sock_table); | |
108 | } | |
fec5e652 TH |
109 | } |
110 | } | |
111 | ||
112 | mutex_unlock(&sock_flow_mutex); | |
113 | ||
114 | return ret; | |
115 | } | |
116 | #endif /* CONFIG_RPS */ | |
117 | ||
99bbc707 WB |
118 | #ifdef CONFIG_NET_FLOW_LIMIT |
119 | static DEFINE_MUTEX(flow_limit_update_mutex); | |
120 | ||
fe2c6338 | 121 | static int flow_limit_cpu_sysctl(struct ctl_table *table, int write, |
32927393 | 122 | void *buffer, size_t *lenp, loff_t *ppos) |
99bbc707 WB |
123 | { |
124 | struct sd_flow_limit *cur; | |
125 | struct softnet_data *sd; | |
126 | cpumask_var_t mask; | |
127 | int i, len, ret = 0; | |
128 | ||
129 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
130 | return -ENOMEM; | |
131 | ||
132 | if (write) { | |
56965ac7 | 133 | ret = cpumask_parse(buffer, mask); |
99bbc707 WB |
134 | if (ret) |
135 | goto done; | |
136 | ||
137 | mutex_lock(&flow_limit_update_mutex); | |
138 | len = sizeof(*cur) + netdev_flow_limit_table_len; | |
139 | for_each_possible_cpu(i) { | |
140 | sd = &per_cpu(softnet_data, i); | |
141 | cur = rcu_dereference_protected(sd->flow_limit, | |
142 | lockdep_is_held(&flow_limit_update_mutex)); | |
143 | if (cur && !cpumask_test_cpu(i, mask)) { | |
144 | RCU_INIT_POINTER(sd->flow_limit, NULL); | |
145 | synchronize_rcu(); | |
146 | kfree(cur); | |
147 | } else if (!cur && cpumask_test_cpu(i, mask)) { | |
5b59d467 ED |
148 | cur = kzalloc_node(len, GFP_KERNEL, |
149 | cpu_to_node(i)); | |
99bbc707 WB |
150 | if (!cur) { |
151 | /* not unwinding previous changes */ | |
152 | ret = -ENOMEM; | |
153 | goto write_unlock; | |
154 | } | |
155 | cur->num_buckets = netdev_flow_limit_table_len; | |
156 | rcu_assign_pointer(sd->flow_limit, cur); | |
157 | } | |
158 | } | |
159 | write_unlock: | |
160 | mutex_unlock(&flow_limit_update_mutex); | |
161 | } else { | |
5f121b9a WB |
162 | char kbuf[128]; |
163 | ||
99bbc707 WB |
164 | if (*ppos || !*lenp) { |
165 | *lenp = 0; | |
166 | goto done; | |
167 | } | |
168 | ||
169 | cpumask_clear(mask); | |
170 | rcu_read_lock(); | |
171 | for_each_possible_cpu(i) { | |
172 | sd = &per_cpu(softnet_data, i); | |
173 | if (rcu_dereference(sd->flow_limit)) | |
174 | cpumask_set_cpu(i, mask); | |
175 | } | |
176 | rcu_read_unlock(); | |
177 | ||
5f121b9a | 178 | len = min(sizeof(kbuf) - 1, *lenp); |
f0906827 | 179 | len = scnprintf(kbuf, len, "%*pb", cpumask_pr_args(mask)); |
5f121b9a WB |
180 | if (!len) { |
181 | *lenp = 0; | |
182 | goto done; | |
183 | } | |
184 | if (len < *lenp) | |
185 | kbuf[len++] = '\n'; | |
32927393 | 186 | memcpy(buffer, kbuf, len); |
5f121b9a WB |
187 | *lenp = len; |
188 | *ppos += len; | |
99bbc707 WB |
189 | } |
190 | ||
191 | done: | |
192 | free_cpumask_var(mask); | |
193 | return ret; | |
194 | } | |
195 | ||
fe2c6338 | 196 | static int flow_limit_table_len_sysctl(struct ctl_table *table, int write, |
32927393 | 197 | void *buffer, size_t *lenp, loff_t *ppos) |
99bbc707 WB |
198 | { |
199 | unsigned int old, *ptr; | |
200 | int ret; | |
201 | ||
202 | mutex_lock(&flow_limit_update_mutex); | |
203 | ||
204 | ptr = table->data; | |
205 | old = *ptr; | |
206 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
207 | if (!ret && write && !is_power_of_2(*ptr)) { | |
208 | *ptr = old; | |
209 | ret = -EINVAL; | |
210 | } | |
211 | ||
212 | mutex_unlock(&flow_limit_update_mutex); | |
213 | return ret; | |
214 | } | |
215 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
216 | ||
6da7c8fc | 217 | #ifdef CONFIG_NET_SCHED |
218 | static int set_default_qdisc(struct ctl_table *table, int write, | |
32927393 | 219 | void *buffer, size_t *lenp, loff_t *ppos) |
6da7c8fc | 220 | { |
221 | char id[IFNAMSIZ]; | |
222 | struct ctl_table tbl = { | |
223 | .data = id, | |
224 | .maxlen = IFNAMSIZ, | |
225 | }; | |
226 | int ret; | |
227 | ||
228 | qdisc_get_default(id, IFNAMSIZ); | |
229 | ||
230 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
231 | if (write && ret == 0) | |
232 | ret = qdisc_set_default(id); | |
233 | return ret; | |
234 | } | |
235 | #endif | |
236 | ||
3d48b53f | 237 | static int proc_do_dev_weight(struct ctl_table *table, int write, |
32927393 | 238 | void *buffer, size_t *lenp, loff_t *ppos) |
3d48b53f MT |
239 | { |
240 | int ret; | |
241 | ||
242 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
243 | if (ret != 0) | |
244 | return ret; | |
245 | ||
246 | dev_rx_weight = weight_p * dev_weight_rx_bias; | |
247 | dev_tx_weight = weight_p * dev_weight_tx_bias; | |
248 | ||
249 | return ret; | |
250 | } | |
251 | ||
960fb622 | 252 | static int proc_do_rss_key(struct ctl_table *table, int write, |
32927393 | 253 | void *buffer, size_t *lenp, loff_t *ppos) |
960fb622 ED |
254 | { |
255 | struct ctl_table fake_table; | |
256 | char buf[NETDEV_RSS_KEY_LEN * 3]; | |
257 | ||
258 | snprintf(buf, sizeof(buf), "%*phC", NETDEV_RSS_KEY_LEN, netdev_rss_key); | |
259 | fake_table.data = buf; | |
260 | fake_table.maxlen = sizeof(buf); | |
261 | return proc_dostring(&fake_table, write, buffer, lenp, ppos); | |
262 | } | |
263 | ||
2e4a3098 DB |
264 | #ifdef CONFIG_BPF_JIT |
265 | static int proc_dointvec_minmax_bpf_enable(struct ctl_table *table, int write, | |
32927393 | 266 | void *buffer, size_t *lenp, |
2e4a3098 DB |
267 | loff_t *ppos) |
268 | { | |
269 | int ret, jit_enable = *(int *)table->data; | |
270 | struct ctl_table tmp = *table; | |
271 | ||
272 | if (write && !capable(CAP_SYS_ADMIN)) | |
273 | return -EPERM; | |
274 | ||
275 | tmp.data = &jit_enable; | |
276 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
277 | if (write && !ret) { | |
278 | if (jit_enable < 2 || | |
63960260 | 279 | (jit_enable == 2 && bpf_dump_raw_ok(current_cred()))) { |
2e4a3098 DB |
280 | *(int *)table->data = jit_enable; |
281 | if (jit_enable == 2) | |
282 | pr_warn("bpf_jit_enable = 2 was set! NEVER use this in production, only for JIT debugging!\n"); | |
283 | } else { | |
284 | ret = -EPERM; | |
285 | } | |
286 | } | |
287 | return ret; | |
288 | } | |
289 | ||
1148f9ad | 290 | # ifdef CONFIG_HAVE_EBPF_JIT |
2e4a3098 DB |
291 | static int |
292 | proc_dointvec_minmax_bpf_restricted(struct ctl_table *table, int write, | |
32927393 | 293 | void *buffer, size_t *lenp, loff_t *ppos) |
2e4a3098 DB |
294 | { |
295 | if (!capable(CAP_SYS_ADMIN)) | |
296 | return -EPERM; | |
297 | ||
298 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
299 | } | |
1148f9ad | 300 | # endif /* CONFIG_HAVE_EBPF_JIT */ |
fdadd049 DB |
301 | |
302 | static int | |
303 | proc_dolongvec_minmax_bpf_restricted(struct ctl_table *table, int write, | |
32927393 | 304 | void *buffer, size_t *lenp, loff_t *ppos) |
fdadd049 DB |
305 | { |
306 | if (!capable(CAP_SYS_ADMIN)) | |
307 | return -EPERM; | |
308 | ||
309 | return proc_doulongvec_minmax(table, write, buffer, lenp, ppos); | |
310 | } | |
2e4a3098 DB |
311 | #endif |
312 | ||
33eb9cfc | 313 | static struct ctl_table net_core_table[] = { |
1da177e4 | 314 | { |
1da177e4 LT |
315 | .procname = "wmem_max", |
316 | .data = &sysctl_wmem_max, | |
317 | .maxlen = sizeof(int), | |
318 | .mode = 0644, | |
cdda8891 | 319 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 320 | .extra1 = &min_sndbuf, |
1da177e4 LT |
321 | }, |
322 | { | |
1da177e4 LT |
323 | .procname = "rmem_max", |
324 | .data = &sysctl_rmem_max, | |
325 | .maxlen = sizeof(int), | |
326 | .mode = 0644, | |
cdda8891 | 327 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 328 | .extra1 = &min_rcvbuf, |
1da177e4 LT |
329 | }, |
330 | { | |
1da177e4 LT |
331 | .procname = "wmem_default", |
332 | .data = &sysctl_wmem_default, | |
333 | .maxlen = sizeof(int), | |
334 | .mode = 0644, | |
cdda8891 | 335 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 336 | .extra1 = &min_sndbuf, |
1da177e4 LT |
337 | }, |
338 | { | |
1da177e4 LT |
339 | .procname = "rmem_default", |
340 | .data = &sysctl_rmem_default, | |
341 | .maxlen = sizeof(int), | |
342 | .mode = 0644, | |
cdda8891 | 343 | .proc_handler = proc_dointvec_minmax, |
b1cb59cf | 344 | .extra1 = &min_rcvbuf, |
1da177e4 LT |
345 | }, |
346 | { | |
1da177e4 LT |
347 | .procname = "dev_weight", |
348 | .data = &weight_p, | |
349 | .maxlen = sizeof(int), | |
350 | .mode = 0644, | |
3d48b53f MT |
351 | .proc_handler = proc_do_dev_weight, |
352 | }, | |
353 | { | |
354 | .procname = "dev_weight_rx_bias", | |
355 | .data = &dev_weight_rx_bias, | |
356 | .maxlen = sizeof(int), | |
357 | .mode = 0644, | |
358 | .proc_handler = proc_do_dev_weight, | |
359 | }, | |
360 | { | |
361 | .procname = "dev_weight_tx_bias", | |
362 | .data = &dev_weight_tx_bias, | |
363 | .maxlen = sizeof(int), | |
364 | .mode = 0644, | |
365 | .proc_handler = proc_do_dev_weight, | |
1da177e4 LT |
366 | }, |
367 | { | |
1da177e4 LT |
368 | .procname = "netdev_max_backlog", |
369 | .data = &netdev_max_backlog, | |
370 | .maxlen = sizeof(int), | |
371 | .mode = 0644, | |
6d9f239a | 372 | .proc_handler = proc_dointvec |
1da177e4 | 373 | }, |
960fb622 ED |
374 | { |
375 | .procname = "netdev_rss_key", | |
376 | .data = &netdev_rss_key, | |
377 | .maxlen = sizeof(int), | |
378 | .mode = 0444, | |
379 | .proc_handler = proc_do_rss_key, | |
380 | }, | |
0a14842f ED |
381 | #ifdef CONFIG_BPF_JIT |
382 | { | |
383 | .procname = "bpf_jit_enable", | |
384 | .data = &bpf_jit_enable, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
2e4a3098 | 387 | .proc_handler = proc_dointvec_minmax_bpf_enable, |
fa9dd599 | 388 | # ifdef CONFIG_BPF_JIT_ALWAYS_ON |
eec4844f MC |
389 | .extra1 = SYSCTL_ONE, |
390 | .extra2 = SYSCTL_ONE, | |
fa9dd599 | 391 | # else |
eec4844f | 392 | .extra1 = SYSCTL_ZERO, |
fa9dd599 DB |
393 | .extra2 = &two, |
394 | # endif | |
0a14842f | 395 | }, |
4f3446bb DB |
396 | # ifdef CONFIG_HAVE_EBPF_JIT |
397 | { | |
398 | .procname = "bpf_jit_harden", | |
399 | .data = &bpf_jit_harden, | |
400 | .maxlen = sizeof(int), | |
401 | .mode = 0600, | |
2e4a3098 | 402 | .proc_handler = proc_dointvec_minmax_bpf_restricted, |
eec4844f | 403 | .extra1 = SYSCTL_ZERO, |
fa9dd599 | 404 | .extra2 = &two, |
4f3446bb | 405 | }, |
74451e66 DB |
406 | { |
407 | .procname = "bpf_jit_kallsyms", | |
408 | .data = &bpf_jit_kallsyms, | |
409 | .maxlen = sizeof(int), | |
410 | .mode = 0600, | |
2e4a3098 | 411 | .proc_handler = proc_dointvec_minmax_bpf_restricted, |
eec4844f MC |
412 | .extra1 = SYSCTL_ZERO, |
413 | .extra2 = SYSCTL_ONE, | |
74451e66 | 414 | }, |
4f3446bb | 415 | # endif |
ede95a63 DB |
416 | { |
417 | .procname = "bpf_jit_limit", | |
418 | .data = &bpf_jit_limit, | |
fdadd049 | 419 | .maxlen = sizeof(long), |
ede95a63 | 420 | .mode = 0600, |
fdadd049 DB |
421 | .proc_handler = proc_dolongvec_minmax_bpf_restricted, |
422 | .extra1 = &long_one, | |
fadb7ff1 | 423 | .extra2 = &bpf_jit_limit_max, |
ede95a63 | 424 | }, |
0a14842f | 425 | #endif |
3b098e2d ED |
426 | { |
427 | .procname = "netdev_tstamp_prequeue", | |
428 | .data = &netdev_tstamp_prequeue, | |
429 | .maxlen = sizeof(int), | |
430 | .mode = 0644, | |
431 | .proc_handler = proc_dointvec | |
432 | }, | |
1da177e4 | 433 | { |
1da177e4 | 434 | .procname = "message_cost", |
717115e1 | 435 | .data = &net_ratelimit_state.interval, |
1da177e4 LT |
436 | .maxlen = sizeof(int), |
437 | .mode = 0644, | |
6d9f239a | 438 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
439 | }, |
440 | { | |
1da177e4 | 441 | .procname = "message_burst", |
717115e1 | 442 | .data = &net_ratelimit_state.burst, |
1da177e4 LT |
443 | .maxlen = sizeof(int), |
444 | .mode = 0644, | |
6d9f239a | 445 | .proc_handler = proc_dointvec, |
1da177e4 LT |
446 | }, |
447 | { | |
1da177e4 LT |
448 | .procname = "optmem_max", |
449 | .data = &sysctl_optmem_max, | |
450 | .maxlen = sizeof(int), | |
451 | .mode = 0644, | |
6d9f239a | 452 | .proc_handler = proc_dointvec |
1da177e4 | 453 | }, |
b245be1f WB |
454 | { |
455 | .procname = "tstamp_allow_data", | |
456 | .data = &sysctl_tstamp_allow_data, | |
457 | .maxlen = sizeof(int), | |
458 | .mode = 0644, | |
459 | .proc_handler = proc_dointvec_minmax, | |
eec4844f MC |
460 | .extra1 = SYSCTL_ZERO, |
461 | .extra2 = SYSCTL_ONE | |
b245be1f | 462 | }, |
fec5e652 TH |
463 | #ifdef CONFIG_RPS |
464 | { | |
465 | .procname = "rps_sock_flow_entries", | |
466 | .maxlen = sizeof(int), | |
467 | .mode = 0644, | |
468 | .proc_handler = rps_sock_flow_sysctl | |
469 | }, | |
470 | #endif | |
99bbc707 WB |
471 | #ifdef CONFIG_NET_FLOW_LIMIT |
472 | { | |
473 | .procname = "flow_limit_cpu_bitmap", | |
474 | .mode = 0644, | |
475 | .proc_handler = flow_limit_cpu_sysctl | |
476 | }, | |
477 | { | |
478 | .procname = "flow_limit_table_len", | |
479 | .data = &netdev_flow_limit_table_len, | |
480 | .maxlen = sizeof(int), | |
481 | .mode = 0644, | |
482 | .proc_handler = flow_limit_table_len_sysctl | |
483 | }, | |
484 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
e0d1095a | 485 | #ifdef CONFIG_NET_RX_BUSY_POLL |
06021292 | 486 | { |
64b0dc51 ET |
487 | .procname = "busy_poll", |
488 | .data = &sysctl_net_busy_poll, | |
eb6db622 | 489 | .maxlen = sizeof(unsigned int), |
06021292 | 490 | .mode = 0644, |
95f25521 | 491 | .proc_handler = proc_dointvec_minmax, |
eec4844f | 492 | .extra1 = SYSCTL_ZERO, |
06021292 | 493 | }, |
2d48d67f | 494 | { |
64b0dc51 ET |
495 | .procname = "busy_read", |
496 | .data = &sysctl_net_busy_read, | |
2d48d67f ET |
497 | .maxlen = sizeof(unsigned int), |
498 | .mode = 0644, | |
95f25521 | 499 | .proc_handler = proc_dointvec_minmax, |
eec4844f | 500 | .extra1 = SYSCTL_ZERO, |
2d48d67f | 501 | }, |
6da7c8fc | 502 | #endif |
503 | #ifdef CONFIG_NET_SCHED | |
504 | { | |
505 | .procname = "default_qdisc", | |
506 | .mode = 0644, | |
507 | .maxlen = IFNAMSIZ, | |
508 | .proc_handler = set_default_qdisc | |
509 | }, | |
06021292 | 510 | #endif |
51b0bded | 511 | { |
51b0bded SH |
512 | .procname = "netdev_budget", |
513 | .data = &netdev_budget, | |
514 | .maxlen = sizeof(int), | |
515 | .mode = 0644, | |
6d9f239a | 516 | .proc_handler = proc_dointvec |
51b0bded | 517 | }, |
a2a316fd | 518 | { |
a2a316fd SH |
519 | .procname = "warnings", |
520 | .data = &net_msg_warn, | |
521 | .maxlen = sizeof(int), | |
522 | .mode = 0644, | |
6d9f239a | 523 | .proc_handler = proc_dointvec |
a2a316fd | 524 | }, |
5f74f82e HWR |
525 | { |
526 | .procname = "max_skb_frags", | |
527 | .data = &sysctl_max_skb_frags, | |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
530 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 531 | .extra1 = SYSCTL_ONE, |
5f74f82e HWR |
532 | .extra2 = &max_skb_frags, |
533 | }, | |
7acf8a1e MW |
534 | { |
535 | .procname = "netdev_budget_usecs", | |
536 | .data = &netdev_budget_usecs, | |
537 | .maxlen = sizeof(unsigned int), | |
538 | .mode = 0644, | |
539 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 540 | .extra1 = SYSCTL_ZERO, |
7acf8a1e | 541 | }, |
79134e6c ED |
542 | { |
543 | .procname = "fb_tunnels_only_for_init_net", | |
544 | .data = &sysctl_fb_tunnels_only_for_init_net, | |
545 | .maxlen = sizeof(int), | |
546 | .mode = 0644, | |
547 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 548 | .extra1 = SYSCTL_ZERO, |
316cdaa1 | 549 | .extra2 = &two, |
79134e6c | 550 | }, |
856c395c CW |
551 | { |
552 | .procname = "devconf_inherit_init_net", | |
553 | .data = &sysctl_devconf_inherit_init_net, | |
554 | .maxlen = sizeof(int), | |
555 | .mode = 0644, | |
556 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 557 | .extra1 = SYSCTL_ZERO, |
9efd6a3c | 558 | .extra2 = &three, |
856c395c | 559 | }, |
ce27ec60 ED |
560 | { |
561 | .procname = "high_order_alloc_disable", | |
562 | .data = &net_high_order_alloc_disable_key.key, | |
563 | .maxlen = sizeof(net_high_order_alloc_disable_key), | |
564 | .mode = 0644, | |
565 | .proc_handler = proc_do_static_key, | |
566 | }, | |
323ebb61 EC |
567 | { |
568 | .procname = "gro_normal_batch", | |
569 | .data = &gro_normal_batch, | |
570 | .maxlen = sizeof(unsigned int), | |
571 | .mode = 0644, | |
572 | .proc_handler = proc_dointvec_minmax, | |
573 | .extra1 = SYSCTL_ONE, | |
574 | }, | |
5aa3afe1 DV |
575 | { |
576 | .procname = "netdev_unregister_timeout_secs", | |
577 | .data = &netdev_unregister_timeout_secs, | |
578 | .maxlen = sizeof(unsigned int), | |
579 | .mode = 0644, | |
580 | .proc_handler = proc_dointvec_minmax, | |
6c996e19 | 581 | .extra1 = SYSCTL_ONE, |
5aa3afe1 DV |
582 | .extra2 = &int_3600, |
583 | }, | |
f8572d8f | 584 | { } |
1da177e4 | 585 | }; |
33eb9cfc | 586 | |
d5a4502e PE |
587 | static struct ctl_table netns_core_table[] = { |
588 | { | |
d5a4502e PE |
589 | .procname = "somaxconn", |
590 | .data = &init_net.core.sysctl_somaxconn, | |
591 | .maxlen = sizeof(int), | |
592 | .mode = 0644, | |
eec4844f | 593 | .extra1 = SYSCTL_ZERO, |
5f671d6b | 594 | .proc_handler = proc_dointvec_minmax |
d5a4502e | 595 | }, |
f8572d8f | 596 | { } |
d5a4502e PE |
597 | }; |
598 | ||
316cdaa1 MB |
599 | static int __init fb_tunnels_only_for_init_net_sysctl_setup(char *str) |
600 | { | |
601 | /* fallback tunnels for initns only */ | |
602 | if (!strncmp(str, "initns", 6)) | |
603 | sysctl_fb_tunnels_only_for_init_net = 1; | |
604 | /* no fallback tunnels anywhere */ | |
605 | else if (!strncmp(str, "none", 4)) | |
606 | sysctl_fb_tunnels_only_for_init_net = 2; | |
607 | ||
608 | return 1; | |
609 | } | |
610 | __setup("fb_tunnels=", fb_tunnels_only_for_init_net_sysctl_setup); | |
611 | ||
024626e3 | 612 | static __net_init int sysctl_core_net_init(struct net *net) |
33eb9cfc | 613 | { |
d5a4502e | 614 | struct ctl_table *tbl; |
024626e3 | 615 | |
d5a4502e | 616 | tbl = netns_core_table; |
09ad9bc7 | 617 | if (!net_eq(net, &init_net)) { |
d5a4502e | 618 | tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); |
024626e3 PE |
619 | if (tbl == NULL) |
620 | goto err_dup; | |
621 | ||
d5a4502e | 622 | tbl[0].data = &net->core.sysctl_somaxconn; |
464dc801 EB |
623 | |
624 | /* Don't export any sysctls to unprivileged users */ | |
625 | if (net->user_ns != &init_user_ns) { | |
626 | tbl[0].procname = NULL; | |
627 | } | |
024626e3 PE |
628 | } |
629 | ||
ec8f23ce | 630 | net->core.sysctl_hdr = register_net_sysctl(net, "net/core", tbl); |
8efa6e93 | 631 | if (net->core.sysctl_hdr == NULL) |
024626e3 | 632 | goto err_reg; |
33eb9cfc | 633 | |
024626e3 PE |
634 | return 0; |
635 | ||
636 | err_reg: | |
d5a4502e | 637 | if (tbl != netns_core_table) |
024626e3 PE |
638 | kfree(tbl); |
639 | err_dup: | |
640 | return -ENOMEM; | |
641 | } | |
642 | ||
643 | static __net_exit void sysctl_core_net_exit(struct net *net) | |
644 | { | |
645 | struct ctl_table *tbl; | |
646 | ||
8efa6e93 PE |
647 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
648 | unregister_net_sysctl_table(net->core.sysctl_hdr); | |
d5a4502e | 649 | BUG_ON(tbl == netns_core_table); |
024626e3 PE |
650 | kfree(tbl); |
651 | } | |
652 | ||
653 | static __net_initdata struct pernet_operations sysctl_core_ops = { | |
654 | .init = sysctl_core_net_init, | |
655 | .exit = sysctl_core_net_exit, | |
656 | }; | |
657 | ||
658 | static __init int sysctl_core_init(void) | |
659 | { | |
43444757 | 660 | register_net_sysctl(&init_net, "net/core", net_core_table); |
024626e3 | 661 | return register_pernet_subsys(&sysctl_core_ops); |
33eb9cfc PE |
662 | } |
663 | ||
b27aeadb | 664 | fs_initcall(sysctl_core_init); |