Merge tag 'nfs-for-4.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[sfrench/cifs-2.6.git] / fs / nfs / nfs4sysctl.c
1 /*
2  * linux/fs/nfs/nfs4sysctl.c
3  *
4  * Sysctl interface to NFS v4 parameters
5  *
6  * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com>
7  */
8 #include <linux/sysctl.h>
9 #include <linux/nfs_fs.h>
10
11 #include "nfs4_fs.h"
12 #include "nfs4idmap.h"
13 #include "callback.h"
14
15 static const int nfs_set_port_min;
16 static const int nfs_set_port_max = 65535;
17 static struct ctl_table_header *nfs4_callback_sysctl_table;
18
19 static struct ctl_table nfs4_cb_sysctls[] = {
20         {
21                 .procname = "nfs_callback_tcpport",
22                 .data = &nfs_callback_set_tcpport,
23                 .maxlen = sizeof(int),
24                 .mode = 0644,
25                 .proc_handler = proc_dointvec_minmax,
26                 .extra1 = (int *)&nfs_set_port_min,
27                 .extra2 = (int *)&nfs_set_port_max,
28         },
29         {
30                 .procname = "idmap_cache_timeout",
31                 .data = &nfs_idmap_cache_timeout,
32                 .maxlen = sizeof(int),
33                 .mode = 0644,
34                 .proc_handler = proc_dointvec_jiffies,
35         },
36         { }
37 };
38
39 static struct ctl_table nfs4_cb_sysctl_dir[] = {
40         {
41                 .procname = "nfs",
42                 .mode = 0555,
43                 .child = nfs4_cb_sysctls,
44         },
45         { }
46 };
47
48 static struct ctl_table nfs4_cb_sysctl_root[] = {
49         {
50                 .procname = "fs",
51                 .mode = 0555,
52                 .child = nfs4_cb_sysctl_dir,
53         },
54         { }
55 };
56
57 int nfs4_register_sysctl(void)
58 {
59         nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root);
60         if (nfs4_callback_sysctl_table == NULL)
61                 return -ENOMEM;
62         return 0;
63 }
64
65 void nfs4_unregister_sysctl(void)
66 {
67         unregister_sysctl_table(nfs4_callback_sysctl_table);
68         nfs4_callback_sysctl_table = NULL;
69 }