[PATCH] sysctl: implement CTL_UNNUMBERED
[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 static const int nfs_set_port_min = 0;
19 static const int nfs_set_port_max = 65535;
20 static struct ctl_table_header *nfs_callback_sysctl_table;
21
22 static ctl_table nfs_cb_sysctls[] = {
23 #ifdef CONFIG_NFS_V4
24         {
25                 .ctl_name = CTL_UNNUMBERED,
26                 .procname = "nfs_callback_tcpport",
27                 .data = &nfs_callback_set_tcpport,
28                 .maxlen = sizeof(int),
29                 .mode = 0644,
30                 .proc_handler = &proc_dointvec_minmax,
31                 .extra1 = (int *)&nfs_set_port_min,
32                 .extra2 = (int *)&nfs_set_port_max,
33         },
34         {
35                 .ctl_name = CTL_UNNUMBERED,
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                 .strategy = &sysctl_jiffies,
42         },
43 #endif
44         {
45                 .ctl_name       = CTL_UNNUMBERED,
46                 .procname       = "nfs_mountpoint_timeout",
47                 .data           = &nfs_mountpoint_expiry_timeout,
48                 .maxlen         = sizeof(nfs_mountpoint_expiry_timeout),
49                 .mode           = 0644,
50                 .proc_handler   = &proc_dointvec_jiffies,
51                 .strategy       = &sysctl_jiffies,
52         },
53         { .ctl_name = 0 }
54 };
55
56 static ctl_table nfs_cb_sysctl_dir[] = {
57         {
58                 .ctl_name = CTL_UNNUMBERED,
59                 .procname = "nfs",
60                 .mode = 0555,
61                 .child = nfs_cb_sysctls,
62         },
63         { .ctl_name = 0 }
64 };
65
66 static ctl_table nfs_cb_sysctl_root[] = {
67         {
68                 .ctl_name = CTL_FS,
69                 .procname = "fs",
70                 .mode = 0555,
71                 .child = nfs_cb_sysctl_dir,
72         },
73         { .ctl_name = 0 }
74 };
75
76 int nfs_register_sysctl(void)
77 {
78         nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root, 0);
79         if (nfs_callback_sysctl_table == NULL)
80                 return -ENOMEM;
81         return 0;
82 }
83
84 void nfs_unregister_sysctl(void)
85 {
86         unregister_sysctl_table(nfs_callback_sysctl_table);
87         nfs_callback_sysctl_table = NULL;
88 }