Merge tag 'acpi-5.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[sfrench/cifs-2.6.git] / net / xfrm / xfrm_sysctl.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/sysctl.h>
3 #include <linux/slab.h>
4 #include <net/net_namespace.h>
5 #include <net/xfrm.h>
6
7 static void __net_init __xfrm_sysctl_init(struct net *net)
8 {
9         net->xfrm.sysctl_aevent_etime = XFRM_AE_ETIME;
10         net->xfrm.sysctl_aevent_rseqth = XFRM_AE_SEQT_SIZE;
11         net->xfrm.sysctl_larval_drop = 1;
12         net->xfrm.sysctl_acq_expires = 30;
13 }
14
15 #ifdef CONFIG_SYSCTL
16 static struct ctl_table xfrm_table[] = {
17         {
18                 .procname       = "xfrm_aevent_etime",
19                 .maxlen         = sizeof(u32),
20                 .mode           = 0644,
21                 .proc_handler   = proc_douintvec
22         },
23         {
24                 .procname       = "xfrm_aevent_rseqth",
25                 .maxlen         = sizeof(u32),
26                 .mode           = 0644,
27                 .proc_handler   = proc_douintvec
28         },
29         {
30                 .procname       = "xfrm_larval_drop",
31                 .maxlen         = sizeof(int),
32                 .mode           = 0644,
33                 .proc_handler   = proc_dointvec
34         },
35         {
36                 .procname       = "xfrm_acq_expires",
37                 .maxlen         = sizeof(int),
38                 .mode           = 0644,
39                 .proc_handler   = proc_dointvec
40         },
41         {}
42 };
43
44 int __net_init xfrm_sysctl_init(struct net *net)
45 {
46         struct ctl_table *table;
47
48         __xfrm_sysctl_init(net);
49
50         table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
51         if (!table)
52                 goto out_kmemdup;
53         table[0].data = &net->xfrm.sysctl_aevent_etime;
54         table[1].data = &net->xfrm.sysctl_aevent_rseqth;
55         table[2].data = &net->xfrm.sysctl_larval_drop;
56         table[3].data = &net->xfrm.sysctl_acq_expires;
57
58         /* Don't export sysctls to unprivileged users */
59         if (net->user_ns != &init_user_ns)
60                 table[0].procname = NULL;
61
62         net->xfrm.sysctl_hdr = register_net_sysctl(net, "net/core", table);
63         if (!net->xfrm.sysctl_hdr)
64                 goto out_register;
65         return 0;
66
67 out_register:
68         kfree(table);
69 out_kmemdup:
70         return -ENOMEM;
71 }
72
73 void __net_exit xfrm_sysctl_fini(struct net *net)
74 {
75         struct ctl_table *table;
76
77         table = net->xfrm.sysctl_hdr->ctl_table_arg;
78         unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
79         kfree(table);
80 }
81 #else
82 int __net_init xfrm_sysctl_init(struct net *net)
83 {
84         __xfrm_sysctl_init(net);
85         return 0;
86 }
87 #endif