1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/nfs/sysctl.c
4 *
5 * Sysctl interface to NFS parameters
6 */
7 #include <linux/types.h>
8 #include <linux/linkage.h>
9 #include <linux/ctype.h>
10 #include <linux/fs.h>
11 #include <linux/sysctl.h>
12 #include <linux/module.h>
13 #include <linux/nfs_fs.h>
14
15 static struct ctl_table_header *nfs_callback_sysctl_table;
16
17 static struct ctl_table nfs_cb_sysctls[] = {
18 {
19 .procname = "nfs_mountpoint_timeout",
20 .data = &nfs_mountpoint_expiry_timeout,
21 .maxlen = sizeof(nfs_mountpoint_expiry_timeout),
22 .mode = 0644,
23 .proc_handler = proc_dointvec_jiffies,
24 },
25 {
26 .procname = "nfs_congestion_kb",
27 .data = &nfs_congestion_kb,
28 .maxlen = sizeof(nfs_congestion_kb),
29 .mode = 0644,
30 .proc_handler = proc_dointvec,
31 },
32 { }
33 };
34
35 static struct ctl_table nfs_cb_sysctl_dir[] = {
36 {
37 .procname = "nfs",
38 .mode = 0555,
39 .child = nfs_cb_sysctls,
40 },
41 { }
42 };
43
44 static struct ctl_table nfs_cb_sysctl_root[] = {
45 {
46 .procname = "fs",
47 .mode = 0555,
48 .child = nfs_cb_sysctl_dir,
49 },
50 { }
51 };
52
nfs_register_sysctl(void)53 int nfs_register_sysctl(void)
54 {
55 nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
56 if (nfs_callback_sysctl_table == NULL)
57 return -ENOMEM;
58 return 0;
59 }
60
nfs_unregister_sysctl(void)61 void nfs_unregister_sysctl(void)
62 {
63 unregister_sysctl_table(nfs_callback_sysctl_table);
64 nfs_callback_sysctl_table = NULL;
65 }
66