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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> |
33eb9cfc | 13 | #include <linux/init.h> |
63d819ca | 14 | #include <net/ip.h> |
20380731 | 15 | #include <net/sock.h> |
1da177e4 | 16 | |
33eb9cfc | 17 | static struct ctl_table net_core_table[] = { |
1da177e4 LT |
18 | #ifdef CONFIG_NET |
19 | { | |
20 | .ctl_name = NET_CORE_WMEM_MAX, | |
21 | .procname = "wmem_max", | |
22 | .data = &sysctl_wmem_max, | |
23 | .maxlen = sizeof(int), | |
24 | .mode = 0644, | |
6d9f239a | 25 | .proc_handler = proc_dointvec |
1da177e4 LT |
26 | }, |
27 | { | |
28 | .ctl_name = NET_CORE_RMEM_MAX, | |
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 | { | |
36 | .ctl_name = NET_CORE_WMEM_DEFAULT, | |
37 | .procname = "wmem_default", | |
38 | .data = &sysctl_wmem_default, | |
39 | .maxlen = sizeof(int), | |
40 | .mode = 0644, | |
6d9f239a | 41 | .proc_handler = proc_dointvec |
1da177e4 LT |
42 | }, |
43 | { | |
44 | .ctl_name = NET_CORE_RMEM_DEFAULT, | |
45 | .procname = "rmem_default", | |
46 | .data = &sysctl_rmem_default, | |
47 | .maxlen = sizeof(int), | |
48 | .mode = 0644, | |
6d9f239a | 49 | .proc_handler = proc_dointvec |
1da177e4 LT |
50 | }, |
51 | { | |
52 | .ctl_name = NET_CORE_DEV_WEIGHT, | |
53 | .procname = "dev_weight", | |
54 | .data = &weight_p, | |
55 | .maxlen = sizeof(int), | |
56 | .mode = 0644, | |
6d9f239a | 57 | .proc_handler = proc_dointvec |
1da177e4 LT |
58 | }, |
59 | { | |
60 | .ctl_name = NET_CORE_MAX_BACKLOG, | |
61 | .procname = "netdev_max_backlog", | |
62 | .data = &netdev_max_backlog, | |
63 | .maxlen = sizeof(int), | |
64 | .mode = 0644, | |
6d9f239a | 65 | .proc_handler = proc_dointvec |
1da177e4 | 66 | }, |
1da177e4 LT |
67 | { |
68 | .ctl_name = NET_CORE_MSG_COST, | |
69 | .procname = "message_cost", | |
717115e1 | 70 | .data = &net_ratelimit_state.interval, |
1da177e4 LT |
71 | .maxlen = sizeof(int), |
72 | .mode = 0644, | |
6d9f239a AD |
73 | .proc_handler = proc_dointvec_jiffies, |
74 | .strategy = sysctl_jiffies, | |
1da177e4 LT |
75 | }, |
76 | { | |
77 | .ctl_name = NET_CORE_MSG_BURST, | |
78 | .procname = "message_burst", | |
717115e1 | 79 | .data = &net_ratelimit_state.burst, |
1da177e4 LT |
80 | .maxlen = sizeof(int), |
81 | .mode = 0644, | |
6d9f239a | 82 | .proc_handler = proc_dointvec, |
1da177e4 LT |
83 | }, |
84 | { | |
85 | .ctl_name = NET_CORE_OPTMEM_MAX, | |
86 | .procname = "optmem_max", | |
87 | .data = &sysctl_optmem_max, | |
88 | .maxlen = sizeof(int), | |
89 | .mode = 0644, | |
6d9f239a | 90 | .proc_handler = proc_dointvec |
1da177e4 | 91 | }, |
1da177e4 | 92 | #endif /* CONFIG_NET */ |
51b0bded SH |
93 | { |
94 | .ctl_name = NET_CORE_BUDGET, | |
95 | .procname = "netdev_budget", | |
96 | .data = &netdev_budget, | |
97 | .maxlen = sizeof(int), | |
98 | .mode = 0644, | |
6d9f239a | 99 | .proc_handler = proc_dointvec |
51b0bded | 100 | }, |
a2a316fd SH |
101 | { |
102 | .ctl_name = NET_CORE_WARNINGS, | |
103 | .procname = "warnings", | |
104 | .data = &net_msg_warn, | |
105 | .maxlen = sizeof(int), | |
106 | .mode = 0644, | |
6d9f239a | 107 | .proc_handler = proc_dointvec |
a2a316fd | 108 | }, |
1da177e4 LT |
109 | { .ctl_name = 0 } |
110 | }; | |
33eb9cfc | 111 | |
d5a4502e PE |
112 | static struct ctl_table netns_core_table[] = { |
113 | { | |
114 | .ctl_name = NET_CORE_SOMAXCONN, | |
115 | .procname = "somaxconn", | |
116 | .data = &init_net.core.sysctl_somaxconn, | |
117 | .maxlen = sizeof(int), | |
118 | .mode = 0644, | |
6d9f239a | 119 | .proc_handler = proc_dointvec |
d5a4502e PE |
120 | }, |
121 | { .ctl_name = 0 } | |
122 | }; | |
123 | ||
b27aeadb | 124 | __net_initdata struct ctl_path net_core_path[] = { |
33eb9cfc PE |
125 | { .procname = "net", .ctl_name = CTL_NET, }, |
126 | { .procname = "core", .ctl_name = NET_CORE, }, | |
127 | { }, | |
128 | }; | |
129 | ||
024626e3 | 130 | static __net_init int sysctl_core_net_init(struct net *net) |
33eb9cfc | 131 | { |
d5a4502e | 132 | struct ctl_table *tbl; |
024626e3 | 133 | |
8efa6e93 | 134 | net->core.sysctl_somaxconn = SOMAXCONN; |
b8e1f9b5 | 135 | |
d5a4502e | 136 | tbl = netns_core_table; |
024626e3 | 137 | if (net != &init_net) { |
d5a4502e | 138 | tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); |
024626e3 PE |
139 | if (tbl == NULL) |
140 | goto err_dup; | |
141 | ||
d5a4502e | 142 | tbl[0].data = &net->core.sysctl_somaxconn; |
024626e3 PE |
143 | } |
144 | ||
8efa6e93 | 145 | net->core.sysctl_hdr = register_net_sysctl_table(net, |
024626e3 | 146 | net_core_path, tbl); |
8efa6e93 | 147 | if (net->core.sysctl_hdr == NULL) |
024626e3 | 148 | goto err_reg; |
33eb9cfc | 149 | |
024626e3 PE |
150 | return 0; |
151 | ||
152 | err_reg: | |
d5a4502e | 153 | if (tbl != netns_core_table) |
024626e3 PE |
154 | kfree(tbl); |
155 | err_dup: | |
156 | return -ENOMEM; | |
157 | } | |
158 | ||
159 | static __net_exit void sysctl_core_net_exit(struct net *net) | |
160 | { | |
161 | struct ctl_table *tbl; | |
162 | ||
8efa6e93 PE |
163 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
164 | unregister_net_sysctl_table(net->core.sysctl_hdr); | |
d5a4502e | 165 | BUG_ON(tbl == netns_core_table); |
024626e3 PE |
166 | kfree(tbl); |
167 | } | |
168 | ||
169 | static __net_initdata struct pernet_operations sysctl_core_ops = { | |
170 | .init = sysctl_core_net_init, | |
171 | .exit = sysctl_core_net_exit, | |
172 | }; | |
173 | ||
174 | static __init int sysctl_core_init(void) | |
175 | { | |
b27aeadb AD |
176 | static struct ctl_table empty[1]; |
177 | ||
178 | register_sysctl_paths(net_core_path, empty); | |
d5a4502e | 179 | register_net_sysctl_rotable(net_core_path, net_core_table); |
024626e3 | 180 | return register_pernet_subsys(&sysctl_core_ops); |
33eb9cfc PE |
181 | } |
182 | ||
b27aeadb | 183 | fs_initcall(sysctl_core_init); |