2 * sysctl_net_core.c: sysctl interface to net core subsystem.
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/core directory entry (empty =) ). [MS]
9 #include <linux/sysctl.h>
10 #include <linux/module.h>
11 #include <linux/socket.h>
12 #include <linux/netdevice.h>
13 #include <linux/ratelimit.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
20 static struct ctl_table net_core_table
[] = {
23 .procname
= "wmem_max",
24 .data
= &sysctl_wmem_max
,
25 .maxlen
= sizeof(int),
27 .proc_handler
= proc_dointvec
30 .procname
= "rmem_max",
31 .data
= &sysctl_rmem_max
,
32 .maxlen
= sizeof(int),
34 .proc_handler
= proc_dointvec
37 .procname
= "wmem_default",
38 .data
= &sysctl_wmem_default
,
39 .maxlen
= sizeof(int),
41 .proc_handler
= proc_dointvec
44 .procname
= "rmem_default",
45 .data
= &sysctl_rmem_default
,
46 .maxlen
= sizeof(int),
48 .proc_handler
= proc_dointvec
51 .procname
= "dev_weight",
53 .maxlen
= sizeof(int),
55 .proc_handler
= proc_dointvec
58 .procname
= "netdev_max_backlog",
59 .data
= &netdev_max_backlog
,
60 .maxlen
= sizeof(int),
62 .proc_handler
= proc_dointvec
65 .procname
= "message_cost",
66 .data
= &net_ratelimit_state
.interval
,
67 .maxlen
= sizeof(int),
69 .proc_handler
= proc_dointvec_jiffies
,
72 .procname
= "message_burst",
73 .data
= &net_ratelimit_state
.burst
,
74 .maxlen
= sizeof(int),
76 .proc_handler
= proc_dointvec
,
79 .procname
= "optmem_max",
80 .data
= &sysctl_optmem_max
,
81 .maxlen
= sizeof(int),
83 .proc_handler
= proc_dointvec
85 #endif /* CONFIG_NET */
87 .procname
= "netdev_budget",
88 .data
= &netdev_budget
,
89 .maxlen
= sizeof(int),
91 .proc_handler
= proc_dointvec
94 .procname
= "warnings",
95 .data
= &net_msg_warn
,
96 .maxlen
= sizeof(int),
98 .proc_handler
= proc_dointvec
103 static struct ctl_table netns_core_table
[] = {
105 .procname
= "somaxconn",
106 .data
= &init_net
.core
.sysctl_somaxconn
,
107 .maxlen
= sizeof(int),
109 .proc_handler
= proc_dointvec
114 __net_initdata
struct ctl_path net_core_path
[] = {
115 { .procname
= "net", },
116 { .procname
= "core", },
120 static __net_init
int sysctl_core_net_init(struct net
*net
)
122 struct ctl_table
*tbl
;
124 net
->core
.sysctl_somaxconn
= SOMAXCONN
;
126 tbl
= netns_core_table
;
127 if (!net_eq(net
, &init_net
)) {
128 tbl
= kmemdup(tbl
, sizeof(netns_core_table
), GFP_KERNEL
);
132 tbl
[0].data
= &net
->core
.sysctl_somaxconn
;
135 net
->core
.sysctl_hdr
= register_net_sysctl_table(net
,
137 if (net
->core
.sysctl_hdr
== NULL
)
143 if (tbl
!= netns_core_table
)
149 static __net_exit
void sysctl_core_net_exit(struct net
*net
)
151 struct ctl_table
*tbl
;
153 tbl
= net
->core
.sysctl_hdr
->ctl_table_arg
;
154 unregister_net_sysctl_table(net
->core
.sysctl_hdr
);
155 BUG_ON(tbl
== netns_core_table
);
159 static __net_initdata
struct pernet_operations sysctl_core_ops
= {
160 .init
= sysctl_core_net_init
,
161 .exit
= sysctl_core_net_exit
,
164 static __init
int sysctl_core_init(void)
166 static struct ctl_table empty
[1];
168 register_sysctl_paths(net_core_path
, empty
);
169 register_net_sysctl_rotable(net_core_path
, net_core_table
);
170 return register_pernet_subsys(&sysctl_core_ops
);
173 fs_initcall(sysctl_core_init
);