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1da177e4 LT |
1 | /* -*- linux-c -*- |
2 | * sysctl_net_core.c: sysctl interface to net core subsystem. | |
3 | * | |
4 | * Begun April 1, 1996, Mike Shaver. | |
5 | * Added /proc/sys/net/core directory entry (empty =) ). [MS] | |
6 | */ | |
7 | ||
8 | #include <linux/mm.h> | |
9 | #include <linux/sysctl.h> | |
1da177e4 | 10 | #include <linux/module.h> |
20380731 | 11 | #include <linux/socket.h> |
a37ae408 | 12 | #include <linux/netdevice.h> |
3fff4c42 | 13 | #include <linux/ratelimit.h> |
33eb9cfc | 14 | #include <linux/init.h> |
3fff4c42 | 15 | |
63d819ca | 16 | #include <net/ip.h> |
20380731 | 17 | #include <net/sock.h> |
1da177e4 | 18 | |
33eb9cfc | 19 | static struct ctl_table net_core_table[] = { |
1da177e4 LT |
20 | #ifdef CONFIG_NET |
21 | { | |
1da177e4 LT |
22 | .procname = "wmem_max", |
23 | .data = &sysctl_wmem_max, | |
24 | .maxlen = sizeof(int), | |
25 | .mode = 0644, | |
6d9f239a | 26 | .proc_handler = proc_dointvec |
1da177e4 LT |
27 | }, |
28 | { | |
1da177e4 LT |
29 | .procname = "rmem_max", |
30 | .data = &sysctl_rmem_max, | |
31 | .maxlen = sizeof(int), | |
32 | .mode = 0644, | |
6d9f239a | 33 | .proc_handler = proc_dointvec |
1da177e4 LT |
34 | }, |
35 | { | |
1da177e4 LT |
36 | .procname = "wmem_default", |
37 | .data = &sysctl_wmem_default, | |
38 | .maxlen = sizeof(int), | |
39 | .mode = 0644, | |
6d9f239a | 40 | .proc_handler = proc_dointvec |
1da177e4 LT |
41 | }, |
42 | { | |
1da177e4 LT |
43 | .procname = "rmem_default", |
44 | .data = &sysctl_rmem_default, | |
45 | .maxlen = sizeof(int), | |
46 | .mode = 0644, | |
6d9f239a | 47 | .proc_handler = proc_dointvec |
1da177e4 LT |
48 | }, |
49 | { | |
1da177e4 LT |
50 | .procname = "dev_weight", |
51 | .data = &weight_p, | |
52 | .maxlen = sizeof(int), | |
53 | .mode = 0644, | |
6d9f239a | 54 | .proc_handler = proc_dointvec |
1da177e4 LT |
55 | }, |
56 | { | |
1da177e4 LT |
57 | .procname = "netdev_max_backlog", |
58 | .data = &netdev_max_backlog, | |
59 | .maxlen = sizeof(int), | |
60 | .mode = 0644, | |
6d9f239a | 61 | .proc_handler = proc_dointvec |
1da177e4 | 62 | }, |
1da177e4 | 63 | { |
1da177e4 | 64 | .procname = "message_cost", |
717115e1 | 65 | .data = &net_ratelimit_state.interval, |
1da177e4 LT |
66 | .maxlen = sizeof(int), |
67 | .mode = 0644, | |
6d9f239a | 68 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
69 | }, |
70 | { | |
1da177e4 | 71 | .procname = "message_burst", |
717115e1 | 72 | .data = &net_ratelimit_state.burst, |
1da177e4 LT |
73 | .maxlen = sizeof(int), |
74 | .mode = 0644, | |
6d9f239a | 75 | .proc_handler = proc_dointvec, |
1da177e4 LT |
76 | }, |
77 | { | |
1da177e4 LT |
78 | .procname = "optmem_max", |
79 | .data = &sysctl_optmem_max, | |
80 | .maxlen = sizeof(int), | |
81 | .mode = 0644, | |
6d9f239a | 82 | .proc_handler = proc_dointvec |
1da177e4 | 83 | }, |
1da177e4 | 84 | #endif /* CONFIG_NET */ |
51b0bded | 85 | { |
51b0bded SH |
86 | .procname = "netdev_budget", |
87 | .data = &netdev_budget, | |
88 | .maxlen = sizeof(int), | |
89 | .mode = 0644, | |
6d9f239a | 90 | .proc_handler = proc_dointvec |
51b0bded | 91 | }, |
a2a316fd | 92 | { |
a2a316fd SH |
93 | .procname = "warnings", |
94 | .data = &net_msg_warn, | |
95 | .maxlen = sizeof(int), | |
96 | .mode = 0644, | |
6d9f239a | 97 | .proc_handler = proc_dointvec |
a2a316fd | 98 | }, |
f8572d8f | 99 | { } |
1da177e4 | 100 | }; |
33eb9cfc | 101 | |
d5a4502e PE |
102 | static struct ctl_table netns_core_table[] = { |
103 | { | |
d5a4502e PE |
104 | .procname = "somaxconn", |
105 | .data = &init_net.core.sysctl_somaxconn, | |
106 | .maxlen = sizeof(int), | |
107 | .mode = 0644, | |
6d9f239a | 108 | .proc_handler = proc_dointvec |
d5a4502e | 109 | }, |
f8572d8f | 110 | { } |
d5a4502e PE |
111 | }; |
112 | ||
b27aeadb | 113 | __net_initdata struct ctl_path net_core_path[] = { |
f8572d8f EB |
114 | { .procname = "net", }, |
115 | { .procname = "core", }, | |
33eb9cfc PE |
116 | { }, |
117 | }; | |
118 | ||
024626e3 | 119 | static __net_init int sysctl_core_net_init(struct net *net) |
33eb9cfc | 120 | { |
d5a4502e | 121 | struct ctl_table *tbl; |
024626e3 | 122 | |
8efa6e93 | 123 | net->core.sysctl_somaxconn = SOMAXCONN; |
b8e1f9b5 | 124 | |
d5a4502e | 125 | tbl = netns_core_table; |
09ad9bc7 | 126 | if (!net_eq(net, &init_net)) { |
d5a4502e | 127 | tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); |
024626e3 PE |
128 | if (tbl == NULL) |
129 | goto err_dup; | |
130 | ||
d5a4502e | 131 | tbl[0].data = &net->core.sysctl_somaxconn; |
024626e3 PE |
132 | } |
133 | ||
8efa6e93 | 134 | net->core.sysctl_hdr = register_net_sysctl_table(net, |
024626e3 | 135 | net_core_path, tbl); |
8efa6e93 | 136 | if (net->core.sysctl_hdr == NULL) |
024626e3 | 137 | goto err_reg; |
33eb9cfc | 138 | |
024626e3 PE |
139 | return 0; |
140 | ||
141 | err_reg: | |
d5a4502e | 142 | if (tbl != netns_core_table) |
024626e3 PE |
143 | kfree(tbl); |
144 | err_dup: | |
145 | return -ENOMEM; | |
146 | } | |
147 | ||
148 | static __net_exit void sysctl_core_net_exit(struct net *net) | |
149 | { | |
150 | struct ctl_table *tbl; | |
151 | ||
8efa6e93 PE |
152 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
153 | unregister_net_sysctl_table(net->core.sysctl_hdr); | |
d5a4502e | 154 | BUG_ON(tbl == netns_core_table); |
024626e3 PE |
155 | kfree(tbl); |
156 | } | |
157 | ||
158 | static __net_initdata struct pernet_operations sysctl_core_ops = { | |
159 | .init = sysctl_core_net_init, | |
160 | .exit = sysctl_core_net_exit, | |
161 | }; | |
162 | ||
163 | static __init int sysctl_core_init(void) | |
164 | { | |
b27aeadb AD |
165 | static struct ctl_table empty[1]; |
166 | ||
167 | register_sysctl_paths(net_core_path, empty); | |
d5a4502e | 168 | register_net_sysctl_rotable(net_core_path, net_core_table); |
024626e3 | 169 | return register_pernet_subsys(&sysctl_core_ops); |
33eb9cfc PE |
170 | } |
171 | ||
b27aeadb | 172 | fs_initcall(sysctl_core_init); |