xref: /openbmc/linux/fs/nfs/nfs4sysctl.c (revision d2235a70)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/fs/nfs/nfs4sysctl.c
4  *
5  * Sysctl interface to NFS v4 parameters
6  *
7  * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com>
8  */
9 #include <linux/sysctl.h>
10 #include <linux/nfs_fs.h>
11 
12 #include "nfs4_fs.h"
13 #include "nfs4idmap.h"
14 #include "callback.h"
15 
16 static const int nfs_set_port_min;
17 static const int nfs_set_port_max = 65535;
18 static struct ctl_table_header *nfs4_callback_sysctl_table;
19 
20 static struct ctl_table nfs4_cb_sysctls[] = {
21 	{
22 		.procname = "nfs_callback_tcpport",
23 		.data = &nfs_callback_set_tcpport,
24 		.maxlen = sizeof(int),
25 		.mode = 0644,
26 		.proc_handler = proc_dointvec_minmax,
27 		.extra1 = (int *)&nfs_set_port_min,
28 		.extra2 = (int *)&nfs_set_port_max,
29 	},
30 	{
31 		.procname = "idmap_cache_timeout",
32 		.data = &nfs_idmap_cache_timeout,
33 		.maxlen = sizeof(int),
34 		.mode = 0644,
35 		.proc_handler = proc_dointvec,
36 	},
37 	{ }
38 };
39 
nfs4_register_sysctl(void)40 int nfs4_register_sysctl(void)
41 {
42 	nfs4_callback_sysctl_table = register_sysctl("fs/nfs",
43 						     nfs4_cb_sysctls);
44 	if (nfs4_callback_sysctl_table == NULL)
45 		return -ENOMEM;
46 	return 0;
47 }
48 
nfs4_unregister_sysctl(void)49 void nfs4_unregister_sysctl(void)
50 {
51 	unregister_sysctl_table(nfs4_callback_sysctl_table);
52 	nfs4_callback_sysctl_table = NULL;
53 }
54