• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
nfs_register_sysctl(void)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 
nfs_unregister_sysctl(void)86 void nfs_unregister_sysctl(void)
87 {
88 	unregister_sysctl_table(nfs_callback_sysctl_table);
89 	nfs_callback_sysctl_table = NULL;
90 }
91