// SPDX-License-Identifier: GPL-2.0-or-later/* * Code for sysctl handling in NTFS Linux kernel driver. * * Copyright (C) 1997 Martin von Löwis, Régis Duchesne * Copyright (c) 2002-2005 Anton Altaparmakov */ #ifdef DEBUG #include <linux/module.h> #ifdef CONFIG_SYSCTL #include <linux/proc_fs.h>#include <linux/sysctl.h> #include "sysctl.h"#include "debug.h" /* Definition of the ntfs sysctl. */static const struct ctl_table ntfs_sysctls[] = {	{		.procname	= "ntfs-debug",		.data		= &debug_msgs,		/* Data pointer and size. */		.maxlen		= sizeof(debug_msgs),		.mode		= 0644,			/* Mode, proc handler. */		.proc_handler	= proc_dointvec	},}; /* Storage for the sysctls header. */static struct ctl_table_header *sysctls_root_table; /* * ntfs_sysctl - add or remove the debug sysctl * @add:	add (1) or remove (0) the sysctl * * Add or remove the debug sysctl. Return 0 on success or -errno on error. */int ntfs_sysctl(int add){	if (add) {		sysctls_root_table = register_sysctl("fs/ntfs", ntfs_sysctls);		if (!sysctls_root_table)			return -ENOMEM;	} else {		unregister_sysctl_table(sysctls_root_table);		sysctls_root_table = NULL;	}	return 0;}#endif /* CONFIG_SYSCTL */#endif /* DEBUG */