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 }
97
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