2bc0384b0448d9d3ab67a53b31de78f4929623a2
[linux-2.6.git] / net / core / sysctl_net_core.c
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>
10 #include <linux/module.h>
11 #include <linux/socket.h>
12 #include <linux/netdevice.h>
13 #include <linux/init.h>
14 #include <net/sock.h>
15 #include <net/xfrm.h>
16
17 static struct ctl_table net_core_table[] = {
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,
25                 .proc_handler   = proc_dointvec
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,
33                 .proc_handler   = proc_dointvec
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,
41                 .proc_handler   = proc_dointvec
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,
49                 .proc_handler   = proc_dointvec
50         },
51         {
52                 .ctl_name       = NET_CORE_DEV_WEIGHT,
53                 .procname       = "dev_weight",
54                 .data           = &weight_p,
55                 .maxlen         = sizeof(int),
56                 .mode           = 0644,
57                 .proc_handler   = proc_dointvec
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,
65                 .proc_handler   = proc_dointvec
66         },
67         {
68                 .ctl_name       = NET_CORE_MSG_COST,
69                 .procname       = "message_cost",
70                 .data           = &net_ratelimit_state.interval,
71                 .maxlen         = sizeof(int),
72                 .mode           = 0644,
73                 .proc_handler   = proc_dointvec_jiffies,
74                 .strategy       = sysctl_jiffies,
75         },
76         {
77                 .ctl_name       = NET_CORE_MSG_BURST,
78                 .procname       = "message_burst",
79                 .data           = &net_ratelimit_state.burst,
80                 .maxlen         = sizeof(int),
81                 .mode           = 0644,
82                 .proc_handler   = proc_dointvec,
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,
90                 .proc_handler   = proc_dointvec
91         },
92 #ifdef CONFIG_XFRM
93         {
94                 .ctl_name       = NET_CORE_AEVENT_ETIME,
95                 .procname       = "xfrm_aevent_etime",
96                 .data           = &sysctl_xfrm_aevent_etime,
97                 .maxlen         = sizeof(u32),
98                 .mode           = 0644,
99                 .proc_handler   = proc_dointvec
100         },
101         {
102                 .ctl_name       = NET_CORE_AEVENT_RSEQTH,
103                 .procname       = "xfrm_aevent_rseqth",
104                 .data           = &sysctl_xfrm_aevent_rseqth,
105                 .maxlen         = sizeof(u32),
106                 .mode           = 0644,
107                 .proc_handler   = proc_dointvec
108         },
109         {
110                 .ctl_name       = CTL_UNNUMBERED,
111                 .procname       = "xfrm_larval_drop",
112                 .data           = &sysctl_xfrm_larval_drop,
113                 .maxlen         = sizeof(int),
114                 .mode           = 0644,
115                 .proc_handler   = proc_dointvec
116         },
117         {
118                 .ctl_name       = CTL_UNNUMBERED,
119                 .procname       = "xfrm_acq_expires",
120                 .data           = &sysctl_xfrm_acq_expires,
121                 .maxlen         = sizeof(int),
122                 .mode           = 0644,
123                 .proc_handler   = proc_dointvec
124         },
125 #endif /* CONFIG_XFRM */
126 #endif /* CONFIG_NET */
127         {
128                 .ctl_name       = NET_CORE_BUDGET,
129                 .procname       = "netdev_budget",
130                 .data           = &netdev_budget,
131                 .maxlen         = sizeof(int),
132                 .mode           = 0644,
133                 .proc_handler   = proc_dointvec
134         },
135         {
136                 .ctl_name       = NET_CORE_WARNINGS,
137                 .procname       = "warnings",
138                 .data           = &net_msg_warn,
139                 .maxlen         = sizeof(int),
140                 .mode           = 0644,
141                 .proc_handler   = proc_dointvec
142         },
143         { .ctl_name = 0 }
144 };
145
146 static struct ctl_table netns_core_table[] = {
147         {
148                 .ctl_name       = NET_CORE_SOMAXCONN,
149                 .procname       = "somaxconn",
150                 .data           = &init_net.core.sysctl_somaxconn,
151                 .maxlen         = sizeof(int),
152                 .mode           = 0644,
153                 .proc_handler   = proc_dointvec
154         },
155         { .ctl_name = 0 }
156 };
157
158 static __net_initdata struct ctl_path net_core_path[] = {
159         { .procname = "net", .ctl_name = CTL_NET, },
160         { .procname = "core", .ctl_name = NET_CORE, },
161         { },
162 };
163
164 static __net_init int sysctl_core_net_init(struct net *net)
165 {
166         struct ctl_table *tbl;
167
168         net->core.sysctl_somaxconn = SOMAXCONN;
169
170         tbl = netns_core_table;
171         if (net != &init_net) {
172                 tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL);
173                 if (tbl == NULL)
174                         goto err_dup;
175
176                 tbl[0].data = &net->core.sysctl_somaxconn;
177         }
178
179         net->core.sysctl_hdr = register_net_sysctl_table(net,
180                         net_core_path, tbl);
181         if (net->core.sysctl_hdr == NULL)
182                 goto err_reg;
183
184         return 0;
185
186 err_reg:
187         if (tbl != netns_core_table)
188                 kfree(tbl);
189 err_dup:
190         return -ENOMEM;
191 }
192
193 static __net_exit void sysctl_core_net_exit(struct net *net)
194 {
195         struct ctl_table *tbl;
196
197         tbl = net->core.sysctl_hdr->ctl_table_arg;
198         unregister_net_sysctl_table(net->core.sysctl_hdr);
199         BUG_ON(tbl == netns_core_table);
200         kfree(tbl);
201 }
202
203 static __net_initdata struct pernet_operations sysctl_core_ops = {
204         .init = sysctl_core_net_init,
205         .exit = sysctl_core_net_exit,
206 };
207
208 static __init int sysctl_core_init(void)
209 {
210         register_net_sysctl_rotable(net_core_path, net_core_table);
211         return register_pernet_subsys(&sysctl_core_ops);
212 }
213
214 __initcall(sysctl_core_init);