Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
[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 #ifndef CONFIG_NFS_USE_NEW_IDMAPPER
36         {
37                 .procname = "idmap_cache_timeout",
38                 .data = &nfs_idmap_cache_timeout,
39                 .maxlen = sizeof(int),
40                 .mode = 0644,
41                 .proc_handler = proc_dointvec_jiffies,
42         },
43 #endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
44 #endif
45         {
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         },
52         {
53                 .procname       = "nfs_congestion_kb",
54                 .data           = &nfs_congestion_kb,
55                 .maxlen         = sizeof(nfs_congestion_kb),
56                 .mode           = 0644,
57                 .proc_handler   = proc_dointvec,
58         },
59         { }
60 };
61
62 static ctl_table nfs_cb_sysctl_dir[] = {
63         {
64                 .procname = "nfs",
65                 .mode = 0555,
66                 .child = nfs_cb_sysctls,
67         },
68         { }
69 };
70
71 static ctl_table nfs_cb_sysctl_root[] = {
72         {
73                 .procname = "fs",
74                 .mode = 0555,
75                 .child = nfs_cb_sysctl_dir,
76         },
77         { }
78 };
79
80 int nfs_register_sysctl(void)
81 {
82         nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
83         if (nfs_callback_sysctl_table == NULL)
84                 return -ENOMEM;
85         return 0;
86 }
87
88 void nfs_unregister_sysctl(void)
89 {
90         unregister_sysctl_table(nfs_callback_sysctl_table);
91         nfs_callback_sysctl_table = NULL;
92 }