[linux.git] / fs / ntfs / sysctl.c

/*
 * sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of
 *	      the Linux-NTFS project. Adapted from the old NTFS driver,
 *	      Copyright (C) 1997 Martin von Löwis, Régis Duchesne
 *
 * Copyright (c) 2002-2005 Anton Altaparmakov
 *
 * This program/include file is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program/include file is distributed in the hope that it will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program (in the main directory of the Linux-NTFS
 * distribution in the file COPYING); if not, write to the Free Software
 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#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 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
	},
	{}
};

/* Define the parent directory /proc/sys/fs. */
static struct ctl_table sysctls_root[] = {
	{
		.procname	= "fs",
		.mode		= 0555,
		.child		= ntfs_sysctls
	},
	{}
};

/* 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) {
		BUG_ON(sysctls_root_table);
		sysctls_root_table = register_sysctl_table(sysctls_root);
		if (!sysctls_root_table)
			return -ENOMEM;
	} else {
		BUG_ON(!sysctls_root_table);
		unregister_sysctl_table(sysctls_root_table);
		sysctls_root_table = NULL;
	}
	return 0;
}

#endif /* CONFIG_SYSCTL */
#endif /* DEBUG */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of
	3	* the Linux-NTFS project. Adapted from the old NTFS driver,
96de0e25	4	* Copyright (C) 1997 Martin von Löwis, Régis Duchesne
1da177e4	5	*
c002f425	6	* Copyright (c) 2002-2005 Anton Altaparmakov
1da177e4 LT	7	*
	8	* This program/include file is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as published
	10	* by the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program/include file is distributed in the hope that it will be
	14	* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
	15	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program (in the main directory of the Linux-NTFS
	20	* distribution in the file COPYING); if not, write to the Free Software
	21	* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23
	24	#ifdef DEBUG
	25
	26	#include <linux/module.h>
	27
	28	#ifdef CONFIG_SYSCTL
	29
	30	#include <linux/proc_fs.h>
	31	#include <linux/sysctl.h>
	32
	33	#include "sysctl.h"
	34	#include "debug.h"
	35
1da177e4	36	/* Definition of the ntfs sysctl. */
5eccdf39	37	static struct ctl_table ntfs_sysctls[] = {
4ed075e9	38	{
4ed075e9 EB	39	.procname = "ntfs-debug",
	40	.data = &debug_msgs, /* Data pointer and size. */
	41	.maxlen = sizeof(debug_msgs),
	42	.mode = 0644, /* Mode, proc handler. */
6d456111	43	.proc_handler = proc_dointvec
4ed075e9 EB	44	},
4ed075e9 EB	45	{}
1da177e4 LT	46	};
	47
	48	/* Define the parent directory /proc/sys/fs. */
5eccdf39	49	static struct ctl_table sysctls_root[] = {
4ed075e9	50	{
4ed075e9 EB	51	.procname = "fs",
	52	.mode = 0555,
	53	.child = ntfs_sysctls
	54	},
	55	{}
1da177e4 LT	56	};
	57
	58	/* Storage for the sysctls header. */
504e0e2f	59	static struct ctl_table_header *sysctls_root_table;
1da177e4 LT	60
	61	/**
	62	* ntfs_sysctl - add or remove the debug sysctl
	63	* @add: add (1) or remove (0) the sysctl
	64	*
	65	* Add or remove the debug sysctl. Return 0 on success or -errno on error.
	66	*/
	67	int ntfs_sysctl(int add)
	68	{
	69	if (add) {
	70	BUG_ON(sysctls_root_table);
0b4d4147	71	sysctls_root_table = register_sysctl_table(sysctls_root);
1da177e4 LT	72	if (!sysctls_root_table)
1da177e4 LT	73	return -ENOMEM;
1da177e4 LT	74	} else {
	75	BUG_ON(!sysctls_root_table);
	76	unregister_sysctl_table(sysctls_root_table);
	77	sysctls_root_table = NULL;
	78	}
	79	return 0;
	80	}
	81
	82	#endif /* CONFIG_SYSCTL */
	83	#endif /* DEBUG */