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