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