Merge branch 'linus' into cpus4096
[linux-2.6] / 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         {
54                 .ctl_name       = CTL_UNNUMBERED,
55                 .procname       = "nfs_congestion_kb",
56                 .data           = &nfs_congestion_kb,
57                 .maxlen         = sizeof(nfs_congestion_kb),
58                 .mode           = 0644,
59                 .proc_handler   = &proc_dointvec,
60         },
61         { .ctl_name = 0 }
62 };
63
64 static ctl_table nfs_cb_sysctl_dir[] = {
65         {
66                 .ctl_name = CTL_UNNUMBERED,
67                 .procname = "nfs",
68                 .mode = 0555,
69                 .child = nfs_cb_sysctls,
70         },
71         { .ctl_name = 0 }
72 };
73
74 static ctl_table nfs_cb_sysctl_root[] = {
75         {
76                 .ctl_name = CTL_FS,
77                 .procname = "fs",
78                 .mode = 0555,
79                 .child = nfs_cb_sysctl_dir,
80         },
81         { .ctl_name = 0 }
82 };
83
84 int nfs_register_sysctl(void)
85 {
86         nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
87         if (nfs_callback_sysctl_table == NULL)
88                 return -ENOMEM;
89         return 0;
90 }
91
92 void nfs_unregister_sysctl(void)
93 {
94         unregister_sysctl_table(nfs_callback_sysctl_table);
95         nfs_callback_sysctl_table = NULL;
96 }