| 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 | #ifdef CONFIG_NETLABEL |
| 19 | #include <net/calipso.h> |
| 20 | #endif |
| 21 | |
| 22 | static int one = 1; |
| 23 | static int auto_flowlabels_min; |
| 24 | static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX; |
| 25 | |
| 26 | |
| 27 | static struct ctl_table ipv6_table_template[] = { |
| 28 | { |
| 29 | .procname = "bindv6only", |
| 30 | .data = &init_net.ipv6.sysctl.bindv6only, |
| 31 | .maxlen = sizeof(int), |
| 32 | .mode = 0644, |
| 33 | .proc_handler = proc_dointvec |
| 34 | }, |
| 35 | { |
| 36 | .procname = "anycast_src_echo_reply", |
| 37 | .data = &init_net.ipv6.sysctl.anycast_src_echo_reply, |
| 38 | .maxlen = sizeof(int), |
| 39 | .mode = 0644, |
| 40 | .proc_handler = proc_dointvec |
| 41 | }, |
| 42 | { |
| 43 | .procname = "flowlabel_consistency", |
| 44 | .data = &init_net.ipv6.sysctl.flowlabel_consistency, |
| 45 | .maxlen = sizeof(int), |
| 46 | .mode = 0644, |
| 47 | .proc_handler = proc_dointvec |
| 48 | }, |
| 49 | { |
| 50 | .procname = "auto_flowlabels", |
| 51 | .data = &init_net.ipv6.sysctl.auto_flowlabels, |
| 52 | .maxlen = sizeof(int), |
| 53 | .mode = 0644, |
| 54 | .proc_handler = proc_dointvec_minmax, |
| 55 | .extra1 = &auto_flowlabels_min, |
| 56 | .extra2 = &auto_flowlabels_max |
| 57 | }, |
| 58 | { |
| 59 | .procname = "fwmark_reflect", |
| 60 | .data = &init_net.ipv6.sysctl.fwmark_reflect, |
| 61 | .maxlen = sizeof(int), |
| 62 | .mode = 0644, |
| 63 | .proc_handler = proc_dointvec |
| 64 | }, |
| 65 | { |
| 66 | .procname = "idgen_retries", |
| 67 | .data = &init_net.ipv6.sysctl.idgen_retries, |
| 68 | .maxlen = sizeof(int), |
| 69 | .mode = 0644, |
| 70 | .proc_handler = proc_dointvec, |
| 71 | }, |
| 72 | { |
| 73 | .procname = "idgen_delay", |
| 74 | .data = &init_net.ipv6.sysctl.idgen_delay, |
| 75 | .maxlen = sizeof(int), |
| 76 | .mode = 0644, |
| 77 | .proc_handler = proc_dointvec_jiffies, |
| 78 | }, |
| 79 | { |
| 80 | .procname = "flowlabel_state_ranges", |
| 81 | .data = &init_net.ipv6.sysctl.flowlabel_state_ranges, |
| 82 | .maxlen = sizeof(int), |
| 83 | .mode = 0644, |
| 84 | .proc_handler = proc_dointvec |
| 85 | }, |
| 86 | { |
| 87 | .procname = "ip_nonlocal_bind", |
| 88 | .data = &init_net.ipv6.sysctl.ip_nonlocal_bind, |
| 89 | .maxlen = sizeof(int), |
| 90 | .mode = 0644, |
| 91 | .proc_handler = proc_dointvec |
| 92 | }, |
| 93 | { } |
| 94 | }; |
| 95 | |
| 96 | static struct ctl_table ipv6_rotable[] = { |
| 97 | { |
| 98 | .procname = "mld_max_msf", |
| 99 | .data = &sysctl_mld_max_msf, |
| 100 | .maxlen = sizeof(int), |
| 101 | .mode = 0644, |
| 102 | .proc_handler = proc_dointvec |
| 103 | }, |
| 104 | { |
| 105 | .procname = "mld_qrv", |
| 106 | .data = &sysctl_mld_qrv, |
| 107 | .maxlen = sizeof(int), |
| 108 | .mode = 0644, |
| 109 | .proc_handler = proc_dointvec_minmax, |
| 110 | .extra1 = &one |
| 111 | }, |
| 112 | #ifdef CONFIG_NETLABEL |
| 113 | { |
| 114 | .procname = "calipso_cache_enable", |
| 115 | .data = &calipso_cache_enabled, |
| 116 | .maxlen = sizeof(int), |
| 117 | .mode = 0644, |
| 118 | .proc_handler = proc_dointvec, |
| 119 | }, |
| 120 | { |
| 121 | .procname = "calipso_cache_bucket_size", |
| 122 | .data = &calipso_cache_bucketsize, |
| 123 | .maxlen = sizeof(int), |
| 124 | .mode = 0644, |
| 125 | .proc_handler = proc_dointvec, |
| 126 | }, |
| 127 | #endif /* CONFIG_NETLABEL */ |
| 128 | { } |
| 129 | }; |
| 130 | |
| 131 | static int __net_init ipv6_sysctl_net_init(struct net *net) |
| 132 | { |
| 133 | struct ctl_table *ipv6_table; |
| 134 | struct ctl_table *ipv6_route_table; |
| 135 | struct ctl_table *ipv6_icmp_table; |
| 136 | int err; |
| 137 | |
| 138 | err = -ENOMEM; |
| 139 | ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template), |
| 140 | GFP_KERNEL); |
| 141 | if (!ipv6_table) |
| 142 | goto out; |
| 143 | ipv6_table[0].data = &net->ipv6.sysctl.bindv6only; |
| 144 | ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply; |
| 145 | ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency; |
| 146 | ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels; |
| 147 | ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect; |
| 148 | ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries; |
| 149 | ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay; |
| 150 | ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges; |
| 151 | ipv6_table[8].data = &net->ipv6.sysctl.ip_nonlocal_bind; |
| 152 | |
| 153 | ipv6_route_table = ipv6_route_sysctl_init(net); |
| 154 | if (!ipv6_route_table) |
| 155 | goto out_ipv6_table; |
| 156 | |
| 157 | ipv6_icmp_table = ipv6_icmp_sysctl_init(net); |
| 158 | if (!ipv6_icmp_table) |
| 159 | goto out_ipv6_route_table; |
| 160 | |
| 161 | net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table); |
| 162 | if (!net->ipv6.sysctl.hdr) |
| 163 | goto out_ipv6_icmp_table; |
| 164 | |
| 165 | net->ipv6.sysctl.route_hdr = |
| 166 | register_net_sysctl(net, "net/ipv6/route", ipv6_route_table); |
| 167 | if (!net->ipv6.sysctl.route_hdr) |
| 168 | goto out_unregister_ipv6_table; |
| 169 | |
| 170 | net->ipv6.sysctl.icmp_hdr = |
| 171 | register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table); |
| 172 | if (!net->ipv6.sysctl.icmp_hdr) |
| 173 | goto out_unregister_route_table; |
| 174 | |
| 175 | err = 0; |
| 176 | out: |
| 177 | return err; |
| 178 | out_unregister_route_table: |
| 179 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); |
| 180 | out_unregister_ipv6_table: |
| 181 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); |
| 182 | out_ipv6_icmp_table: |
| 183 | kfree(ipv6_icmp_table); |
| 184 | out_ipv6_route_table: |
| 185 | kfree(ipv6_route_table); |
| 186 | out_ipv6_table: |
| 187 | kfree(ipv6_table); |
| 188 | goto out; |
| 189 | } |
| 190 | |
| 191 | static void __net_exit ipv6_sysctl_net_exit(struct net *net) |
| 192 | { |
| 193 | struct ctl_table *ipv6_table; |
| 194 | struct ctl_table *ipv6_route_table; |
| 195 | struct ctl_table *ipv6_icmp_table; |
| 196 | |
| 197 | ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg; |
| 198 | ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg; |
| 199 | ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg; |
| 200 | |
| 201 | unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr); |
| 202 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); |
| 203 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); |
| 204 | |
| 205 | kfree(ipv6_table); |
| 206 | kfree(ipv6_route_table); |
| 207 | kfree(ipv6_icmp_table); |
| 208 | } |
| 209 | |
| 210 | static struct pernet_operations ipv6_sysctl_net_ops = { |
| 211 | .init = ipv6_sysctl_net_init, |
| 212 | .exit = ipv6_sysctl_net_exit, |
| 213 | }; |
| 214 | |
| 215 | static struct ctl_table_header *ip6_header; |
| 216 | |
| 217 | int ipv6_sysctl_register(void) |
| 218 | { |
| 219 | int err = -ENOMEM; |
| 220 | |
| 221 | ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable); |
| 222 | if (!ip6_header) |
| 223 | goto out; |
| 224 | |
| 225 | err = register_pernet_subsys(&ipv6_sysctl_net_ops); |
| 226 | if (err) |
| 227 | goto err_pernet; |
| 228 | out: |
| 229 | return err; |
| 230 | |
| 231 | err_pernet: |
| 232 | unregister_net_sysctl_table(ip6_header); |
| 233 | goto out; |
| 234 | } |
| 235 | |
| 236 | void ipv6_sysctl_unregister(void) |
| 237 | { |
| 238 | unregister_net_sysctl_table(ip6_header); |
| 239 | unregister_pernet_subsys(&ipv6_sysctl_net_ops); |
| 240 | } |