2 * sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
5 * YOSHIFUJI Hideaki @USAGI: added icmp sysctl table.
9 #include <linux/sysctl.h>
10 #include <linux/in6.h>
11 #include <linux/ipv6.h>
12 #include <net/ndisc.h>
14 #include <net/addrconf.h>
15 #include <net/inet_frag.h>
17 extern struct ctl_table
*ipv6_route_sysctl_init(struct net
*net
);
18 extern struct ctl_table
*ipv6_icmp_sysctl_init(struct net
*net
);
20 static ctl_table ipv6_table_template
[] = {
22 .ctl_name
= NET_IPV6_ROUTE
,
26 .child
= ipv6_route_table_template
29 .ctl_name
= NET_IPV6_ICMP
,
33 .child
= ipv6_icmp_table_template
36 .ctl_name
= NET_IPV6_BINDV6ONLY
,
37 .procname
= "bindv6only",
38 .data
= &init_net
.ipv6
.sysctl
.bindv6only
,
39 .maxlen
= sizeof(int),
41 .proc_handler
= &proc_dointvec
44 .ctl_name
= NET_IPV6_IP6FRAG_HIGH_THRESH
,
45 .procname
= "ip6frag_high_thresh",
46 .data
= &init_net
.ipv6
.sysctl
.frags
.high_thresh
,
47 .maxlen
= sizeof(int),
49 .proc_handler
= &proc_dointvec
52 .ctl_name
= NET_IPV6_IP6FRAG_LOW_THRESH
,
53 .procname
= "ip6frag_low_thresh",
54 .data
= &init_net
.ipv6
.sysctl
.frags
.low_thresh
,
55 .maxlen
= sizeof(int),
57 .proc_handler
= &proc_dointvec
60 .ctl_name
= NET_IPV6_IP6FRAG_TIME
,
61 .procname
= "ip6frag_time",
62 .data
= &init_net
.ipv6
.sysctl
.frags
.timeout
,
63 .maxlen
= sizeof(int),
65 .proc_handler
= &proc_dointvec_jiffies
,
66 .strategy
= &sysctl_jiffies
,
69 .ctl_name
= NET_IPV6_IP6FRAG_SECRET_INTERVAL
,
70 .procname
= "ip6frag_secret_interval",
71 .data
= &init_net
.ipv6
.sysctl
.frags
.secret_interval
,
72 .maxlen
= sizeof(int),
74 .proc_handler
= &proc_dointvec_jiffies
,
75 .strategy
= &sysctl_jiffies
78 .ctl_name
= NET_IPV6_MLD_MAX_MSF
,
79 .procname
= "mld_max_msf",
80 .data
= &sysctl_mld_max_msf
,
81 .maxlen
= sizeof(int),
83 .proc_handler
= &proc_dointvec
88 struct ctl_path net_ipv6_ctl_path
[] = {
89 { .procname
= "net", .ctl_name
= CTL_NET
, },
90 { .procname
= "ipv6", .ctl_name
= NET_IPV6
, },
93 EXPORT_SYMBOL_GPL(net_ipv6_ctl_path
);
95 static int ipv6_sysctl_net_init(struct net
*net
)
97 struct ctl_table
*ipv6_table
;
98 struct ctl_table
*ipv6_route_table
;
99 struct ctl_table
*ipv6_icmp_table
;
103 ipv6_table
= kmemdup(ipv6_table_template
, sizeof(ipv6_table_template
),
108 ipv6_route_table
= ipv6_route_sysctl_init(net
);
109 if (!ipv6_route_table
)
112 ipv6_icmp_table
= ipv6_icmp_sysctl_init(net
);
113 if (!ipv6_icmp_table
)
114 goto out_ipv6_route_table
;
116 ipv6_table
[0].child
= ipv6_route_table
;
117 ipv6_table
[1].child
= ipv6_icmp_table
;
119 ipv6_table
[2].data
= &net
->ipv6
.sysctl
.bindv6only
;
120 ipv6_table
[3].data
= &net
->ipv6
.sysctl
.frags
.high_thresh
;
121 ipv6_table
[4].data
= &net
->ipv6
.sysctl
.frags
.low_thresh
;
122 ipv6_table
[5].data
= &net
->ipv6
.sysctl
.frags
.timeout
;
123 ipv6_table
[6].data
= &net
->ipv6
.sysctl
.frags
.secret_interval
;
125 /* We don't want this value to be per namespace, it should be global
126 to all namespaces, so make it read-only when we are not in the
127 init network namespace */
128 if (net
!= &init_net
)
129 ipv6_table
[7].mode
= 0444;
131 net
->ipv6
.sysctl
.table
= register_net_sysctl_table(net
, net_ipv6_ctl_path
,
133 if (!net
->ipv6
.sysctl
.table
)
136 if (!net
->ipv6
.sysctl
.table
)
137 goto out_ipv6_icmp_table
;
144 kfree(ipv6_icmp_table
);
145 out_ipv6_route_table
:
146 kfree(ipv6_route_table
);
152 static void ipv6_sysctl_net_exit(struct net
*net
)
154 struct ctl_table
*ipv6_table
;
155 struct ctl_table
*ipv6_route_table
;
156 struct ctl_table
*ipv6_icmp_table
;
158 ipv6_table
= net
->ipv6
.sysctl
.table
->ctl_table_arg
;
159 ipv6_route_table
= ipv6_table
[0].child
;
160 ipv6_icmp_table
= ipv6_table
[1].child
;
162 unregister_net_sysctl_table(net
->ipv6
.sysctl
.table
);
165 kfree(ipv6_route_table
);
166 kfree(ipv6_icmp_table
);
169 static struct pernet_operations ipv6_sysctl_net_ops
= {
170 .init
= ipv6_sysctl_net_init
,
171 .exit
= ipv6_sysctl_net_exit
,
174 int ipv6_sysctl_register(void)
176 return register_pernet_subsys(&ipv6_sysctl_net_ops
);
179 void ipv6_sysctl_unregister(void)
181 unregister_pernet_subsys(&ipv6_sysctl_net_ops
);