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> 10#include <linux/in6.h> 11#include <linux/ipv6.h> 12#include <linux/slab.h> 13#include <linux/export.h> 14#include <net/ndisc.h> 15#include <net/ipv6.h> 16#include <net/addrconf.h> 17#include <net/inet_frag.h> 18 19static ctl_table ipv6_table_template[] = { 20 { 21 .procname = "bindv6only", 22 .data = &init_net.ipv6.sysctl.bindv6only, 23 .maxlen = sizeof(int), 24 .mode = 0644, 25 .proc_handler = proc_dointvec 26 }, 27 { 28 .procname = "fwmark_reflect", 29 .data = &init_net.ipv6.sysctl.fwmark_reflect, 30 .maxlen = sizeof(int), 31 .mode = 0644, 32 .proc_handler = proc_dointvec 33 }, 34 { } 35}; 36 37static ctl_table ipv6_rotable[] = { 38 { 39 .procname = "mld_max_msf", 40 .data = &sysctl_mld_max_msf, 41 .maxlen = sizeof(int), 42 .mode = 0644, 43 .proc_handler = proc_dointvec 44 }, 45 { } 46}; 47 48static int __net_init ipv6_sysctl_net_init(struct net *net) 49{ 50 struct ctl_table *ipv6_table; 51 struct ctl_table *ipv6_route_table; 52 struct ctl_table *ipv6_icmp_table; 53 int err; 54 55 err = -ENOMEM; 56 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template), 57 GFP_KERNEL); 58 if (!ipv6_table) 59 goto out; 60 ipv6_table[0].data = &net->ipv6.sysctl.bindv6only; 61 62 ipv6_route_table = ipv6_route_sysctl_init(net); 63 if (!ipv6_route_table) 64 goto out_ipv6_table; 65 66 ipv6_icmp_table = ipv6_icmp_sysctl_init(net); 67 if (!ipv6_icmp_table) 68 goto out_ipv6_route_table; 69 70 net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table); 71 if (!net->ipv6.sysctl.hdr) 72 goto out_ipv6_icmp_table; 73 74 net->ipv6.sysctl.route_hdr = 75 register_net_sysctl(net, "net/ipv6/route", ipv6_route_table); 76 if (!net->ipv6.sysctl.route_hdr) 77 goto out_unregister_ipv6_table; 78 79 net->ipv6.sysctl.icmp_hdr = 80 register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table); 81 if (!net->ipv6.sysctl.icmp_hdr) 82 goto out_unregister_route_table; 83 84 err = 0; 85out: 86 return err; 87out_unregister_route_table: 88 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); 89out_unregister_ipv6_table: 90 unregister_net_sysctl_table(net->ipv6.sysctl.hdr); 91out_ipv6_icmp_table: 92 kfree(ipv6_icmp_table); 93out_ipv6_route_table: 94 kfree(ipv6_route_table); 95out_ipv6_table: 96 kfree(ipv6_table); 97 goto out; 98} 99 100static void __net_exit ipv6_sysctl_net_exit(struct net *net) 101{ 102 struct ctl_table *ipv6_table; 103 struct ctl_table *ipv6_route_table; 104 struct ctl_table *ipv6_icmp_table; 105 106 ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg; 107 ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg; 108 ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg; 109 110 unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr); 111 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); 112 unregister_net_sysctl_table(net->ipv6.sysctl.hdr); 113 114 kfree(ipv6_table); 115 kfree(ipv6_route_table); 116 kfree(ipv6_icmp_table); 117} 118 119static struct pernet_operations ipv6_sysctl_net_ops = { 120 .init = ipv6_sysctl_net_init, 121 .exit = ipv6_sysctl_net_exit, 122}; 123 124static struct ctl_table_header *ip6_header; 125 126int ipv6_sysctl_register(void) 127{ 128 int err = -ENOMEM; 129 130 ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable); 131 if (ip6_header == NULL) 132 goto out; 133 134 err = register_pernet_subsys(&ipv6_sysctl_net_ops); 135 if (err) 136 goto err_pernet; 137out: 138 return err; 139 140err_pernet: 141 unregister_net_sysctl_table(ip6_header); 142 goto out; 143} 144 145void ipv6_sysctl_unregister(void) 146{ 147 unregister_net_sysctl_table(ip6_header); 148 unregister_pernet_subsys(&ipv6_sysctl_net_ops); 149} 150