Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem. | |
3 | * | |
4 | * Changes: | |
5 | * YOSHIFUJI Hideaki @USAGI: added icmp sysctl table. | |
6 | */ | |
7 | ||
8 | #include <linux/mm.h> | |
9 | #include <linux/sysctl.h> | |
1da177e4 LT |
10 | #include <linux/in6.h> |
11 | #include <linux/ipv6.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
bc3b2d7f | 13 | #include <linux/export.h> |
1da177e4 LT |
14 | #include <net/ndisc.h> |
15 | #include <net/ipv6.h> | |
16 | #include <net/addrconf.h> | |
04128f23 | 17 | #include <net/inet_frag.h> |
1da177e4 | 18 | |
760f2d01 | 19 | static ctl_table ipv6_table_template[] = { |
1da177e4 | 20 | { |
1da177e4 | 21 | .procname = "bindv6only", |
99bc9c4e | 22 | .data = &init_net.ipv6.sysctl.bindv6only, |
1da177e4 LT |
23 | .maxlen = sizeof(int), |
24 | .mode = 0644, | |
6d9f239a | 25 | .proc_handler = proc_dointvec |
1da177e4 | 26 | }, |
f8572d8f | 27 | { } |
34ac2573 PE |
28 | }; |
29 | ||
81e43213 | 30 | static ctl_table ipv6_rotable[] = { |
1da177e4 | 31 | { |
1da177e4 LT |
32 | .procname = "mld_max_msf", |
33 | .data = &sysctl_mld_max_msf, | |
34 | .maxlen = sizeof(int), | |
35 | .mode = 0644, | |
6d9f239a | 36 | .proc_handler = proc_dointvec |
1da177e4 | 37 | }, |
f8572d8f | 38 | { } |
1da177e4 LT |
39 | }; |
40 | ||
2c8c1e72 | 41 | static int __net_init ipv6_sysctl_net_init(struct net *net) |
1da177e4 | 42 | { |
760f2d01 DL |
43 | struct ctl_table *ipv6_table; |
44 | struct ctl_table *ipv6_route_table; | |
45 | struct ctl_table *ipv6_icmp_table; | |
46 | int err; | |
47 | ||
48 | err = -ENOMEM; | |
49 | ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template), | |
50 | GFP_KERNEL); | |
51 | if (!ipv6_table) | |
52 | goto out; | |
6dceb036 | 53 | ipv6_table[0].data = &net->ipv6.sysctl.bindv6only; |
760f2d01 DL |
54 | |
55 | ipv6_route_table = ipv6_route_sysctl_init(net); | |
56 | if (!ipv6_route_table) | |
57 | goto out_ipv6_table; | |
58 | ||
59 | ipv6_icmp_table = ipv6_icmp_sysctl_init(net); | |
60 | if (!ipv6_icmp_table) | |
61 | goto out_ipv6_route_table; | |
760f2d01 | 62 | |
6dceb036 EB |
63 | net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table); |
64 | if (!net->ipv6.sysctl.hdr) | |
760f2d01 DL |
65 | goto out_ipv6_icmp_table; |
66 | ||
6dceb036 EB |
67 | net->ipv6.sysctl.route_hdr = |
68 | register_net_sysctl(net, "net/ipv6/route", ipv6_route_table); | |
69 | if (!net->ipv6.sysctl.route_hdr) | |
70 | goto out_unregister_ipv6_table; | |
71 | ||
72 | net->ipv6.sysctl.icmp_hdr = | |
73 | register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table); | |
74 | if (!net->ipv6.sysctl.icmp_hdr) | |
75 | goto out_unregister_route_table; | |
76 | ||
760f2d01 DL |
77 | err = 0; |
78 | out: | |
79 | return err; | |
6dceb036 EB |
80 | out_unregister_route_table: |
81 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); | |
82 | out_unregister_ipv6_table: | |
83 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); | |
760f2d01 DL |
84 | out_ipv6_icmp_table: |
85 | kfree(ipv6_icmp_table); | |
86 | out_ipv6_route_table: | |
87 | kfree(ipv6_route_table); | |
88 | out_ipv6_table: | |
89 | kfree(ipv6_table); | |
90 | goto out; | |
1da177e4 LT |
91 | } |
92 | ||
2c8c1e72 | 93 | static void __net_exit ipv6_sysctl_net_exit(struct net *net) |
89918fc2 | 94 | { |
760f2d01 DL |
95 | struct ctl_table *ipv6_table; |
96 | struct ctl_table *ipv6_route_table; | |
97 | struct ctl_table *ipv6_icmp_table; | |
98 | ||
6dceb036 EB |
99 | ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg; |
100 | ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg; | |
101 | ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg; | |
760f2d01 | 102 | |
6dceb036 EB |
103 | unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr); |
104 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); | |
105 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); | |
760f2d01 DL |
106 | |
107 | kfree(ipv6_table); | |
108 | kfree(ipv6_route_table); | |
109 | kfree(ipv6_icmp_table); | |
89918fc2 DL |
110 | } |
111 | ||
112 | static struct pernet_operations ipv6_sysctl_net_ops = { | |
113 | .init = ipv6_sysctl_net_init, | |
114 | .exit = ipv6_sysctl_net_exit, | |
115 | }; | |
116 | ||
34ac2573 PE |
117 | static struct ctl_table_header *ip6_header; |
118 | ||
89918fc2 DL |
119 | int ipv6_sysctl_register(void) |
120 | { | |
c19a28e1 | 121 | int err = -ENOMEM; |
34ac2573 | 122 | |
43444757 | 123 | ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable); |
34ac2573 PE |
124 | if (ip6_header == NULL) |
125 | goto out; | |
126 | ||
127 | err = register_pernet_subsys(&ipv6_sysctl_net_ops); | |
128 | if (err) | |
129 | goto err_pernet; | |
130 | out: | |
131 | return err; | |
132 | ||
133 | err_pernet: | |
134 | unregister_net_sysctl_table(ip6_header); | |
135 | goto out; | |
89918fc2 DL |
136 | } |
137 | ||
1da177e4 LT |
138 | void ipv6_sysctl_unregister(void) |
139 | { | |
34ac2573 | 140 | unregister_net_sysctl_table(ip6_header); |
89918fc2 | 141 | unregister_pernet_subsys(&ipv6_sysctl_net_ops); |
1da177e4 | 142 | } |