1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/fs/fuse/fuse_sysctl.c
 4 *
 5 * Sysctl interface to fuse parameters
 6 */
 7#include <linux/sysctl.h>
 8
 9#include "fuse_i.h"
10
11static struct ctl_table_header *fuse_table_header;
12
13/* Bound by fuse_init_out max_pages, which is a u16 */
14static unsigned int sysctl_fuse_max_pages_limit = 65535;
15
16static struct ctl_table fuse_sysctl_table[] = {
17	{
18		.procname	= "max_pages_limit",
19		.data		= &fuse_max_pages_limit,
20		.maxlen		= sizeof(fuse_max_pages_limit),
21		.mode		= 0644,
22		.proc_handler	= proc_douintvec_minmax,
23		.extra1		= SYSCTL_ONE,
24		.extra2		= &sysctl_fuse_max_pages_limit,
25	},
26};
27
28int fuse_sysctl_register(void)
29{
30	fuse_table_header = register_sysctl("fs/fuse", fuse_sysctl_table);
31	if (!fuse_table_header)
32		return -ENOMEM;
33	return 0;
34}
35
36void fuse_sysctl_unregister(void)
37{
38	unregister_sysctl_table(fuse_table_header);
39	fuse_table_header = NULL;
40}