1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/fs/nfs/sysctl.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Sysctl interface to NFS parameters
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #include <linux/types.h>
8*4882a593Smuzhiyun #include <linux/linkage.h>
9*4882a593Smuzhiyun #include <linux/ctype.h>
10*4882a593Smuzhiyun #include <linux/fs.h>
11*4882a593Smuzhiyun #include <linux/sysctl.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/nfs_fs.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static struct ctl_table_header *nfs_callback_sysctl_table;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static struct ctl_table nfs_cb_sysctls[] = {
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun .procname = "nfs_mountpoint_timeout",
20*4882a593Smuzhiyun .data = &nfs_mountpoint_expiry_timeout,
21*4882a593Smuzhiyun .maxlen = sizeof(nfs_mountpoint_expiry_timeout),
22*4882a593Smuzhiyun .mode = 0644,
23*4882a593Smuzhiyun .proc_handler = proc_dointvec_jiffies,
24*4882a593Smuzhiyun },
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun .procname = "nfs_congestion_kb",
27*4882a593Smuzhiyun .data = &nfs_congestion_kb,
28*4882a593Smuzhiyun .maxlen = sizeof(nfs_congestion_kb),
29*4882a593Smuzhiyun .mode = 0644,
30*4882a593Smuzhiyun .proc_handler = proc_dointvec,
31*4882a593Smuzhiyun },
32*4882a593Smuzhiyun { }
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun static struct ctl_table nfs_cb_sysctl_dir[] = {
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun .procname = "nfs",
38*4882a593Smuzhiyun .mode = 0555,
39*4882a593Smuzhiyun .child = nfs_cb_sysctls,
40*4882a593Smuzhiyun },
41*4882a593Smuzhiyun { }
42*4882a593Smuzhiyun };
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun static struct ctl_table nfs_cb_sysctl_root[] = {
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun .procname = "fs",
47*4882a593Smuzhiyun .mode = 0555,
48*4882a593Smuzhiyun .child = nfs_cb_sysctl_dir,
49*4882a593Smuzhiyun },
50*4882a593Smuzhiyun { }
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
nfs_register_sysctl(void)53*4882a593Smuzhiyun int nfs_register_sysctl(void)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
56*4882a593Smuzhiyun if (nfs_callback_sysctl_table == NULL)
57*4882a593Smuzhiyun return -ENOMEM;
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
nfs_unregister_sysctl(void)61*4882a593Smuzhiyun void nfs_unregister_sysctl(void)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun unregister_sysctl_table(nfs_callback_sysctl_table);
64*4882a593Smuzhiyun nfs_callback_sysctl_table = NULL;
65*4882a593Smuzhiyun }
66