NFS: Avoid warnings when CONFIG_NFS_V4=n
[linux-2.6.git] / fs / nfs / sysctl.c
1 /*
2  * linux/fs/nfs/sysctl.c
3  *
4  * Sysctl interface to NFS parameters
5  */
6 #include <linux/types.h>
7 #include <linux/linkage.h>
8 #include <linux/ctype.h>
9 #include <linux/fs.h>
10 #include <linux/sysctl.h>
11 #include <linux/module.h>
12 #include <linux/nfs4.h>
13 #include <linux/nfs_idmap.h>
14 #include <linux/nfs_fs.h>
15
16 #include "callback.h"
17
18 #ifdef CONFIG_NFS_V4
19 static const int nfs_set_port_min = 0;
20 static const int nfs_set_port_max = 65535;
21 #endif
22 static struct ctl_table_header *nfs_callback_sysctl_table;
23
24 static ctl_table nfs_cb_sysctls[] = {
25 #ifdef CONFIG_NFS_V4
26         {
27                 .procname = "nfs_callback_tcpport",
28                 .data = &nfs_callback_set_tcpport,
29                 .maxlen = sizeof(int),
30                 .mode = 0644,
31                 .proc_handler = proc_dointvec_minmax,
32                 .extra1 = (int *)&nfs_set_port_min,
33                 .extra2 = (int *)&nfs_set_port_max,
34         },
35         {
36                 .procname = "idmap_cache_timeout",
37                 .data = &nfs_idmap_cache_timeout,
38                 .maxlen = sizeof(int),
39                 .mode = 0644,
40                 .proc_handler = proc_dointvec_jiffies,
41         },
42 #endif
43         {
44                 .procname       = "nfs_mountpoint_timeout",
45                 .data           = &nfs_mountpoint_expiry_timeout,
46                 .maxlen         = sizeof(nfs_mountpoint_expiry_timeout),
47                 .mode           = 0644,
48                 .proc_handler   = proc_dointvec_jiffies,
49         },
50         {
51                 .procname       = "nfs_congestion_kb",
52                 .data           = &nfs_congestion_kb,
53                 .maxlen         = sizeof(nfs_congestion_kb),
54                 .mode           = 0644,
55                 .proc_handler   = proc_dointvec,
56         },
57         { }
58 };
59
60 static ctl_table nfs_cb_sysctl_dir[] = {
61         {
62                 .procname = "nfs",
63                 .mode = 0555,
64                 .child = nfs_cb_sysctls,
65         },
66         { }
67 };
68
69 static ctl_table nfs_cb_sysctl_root[] = {
70         {
71                 .procname = "fs",
72                 .mode = 0555,
73                 .child = nfs_cb_sysctl_dir,
74         },
75         { }
76 };
77
78 int nfs_register_sysctl(void)
79 {
80         nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
81         if (nfs_callback_sysctl_table == NULL)
82                 return -ENOMEM;
83         return 0;
84 }
85
86 void nfs_unregister_sysctl(void)
87 {
88         unregister_sysctl_table(nfs_callback_sysctl_table);
89         nfs_callback_sysctl_table = NULL;
90 }