c002f42543
enable bit which is set appropriately and a per inode sparse disable
bit which is preset on some system file inodes as appropriate.
- Enforce that sparse support is disabled on NTFS volumes pre 3.0.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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* sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of
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* the Linux-NTFS project. Adapted from the old NTFS driver,
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* Copyright (C) 1997 Martin von Löwis, Régis Duchesne
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*
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* Copyright (c) 2002-2005 Anton Altaparmakov
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program/include file is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the Linux-NTFS
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* distribution in the file COPYING); if not, write to the Free Software
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* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef DEBUG
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#include <linux/module.h>
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#ifdef CONFIG_SYSCTL
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#include <linux/proc_fs.h>
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#include <linux/sysctl.h>
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#include "sysctl.h"
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#include "debug.h"
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#define FS_NTFS 1
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/* Definition of the ntfs sysctl. */
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static ctl_table ntfs_sysctls[] = {
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{ FS_NTFS, "ntfs-debug", /* Binary and text IDs. */
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&debug_msgs,sizeof(debug_msgs), /* Data pointer and size. */
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0644, NULL, &proc_dointvec }, /* Mode, child, proc handler. */
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{ 0 }
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};
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/* Define the parent directory /proc/sys/fs. */
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static ctl_table sysctls_root[] = {
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{ CTL_FS, "fs", NULL, 0, 0555, ntfs_sysctls },
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{ 0 }
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};
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/* Storage for the sysctls header. */
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static struct ctl_table_header *sysctls_root_table = NULL;
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/**
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* ntfs_sysctl - add or remove the debug sysctl
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* @add: add (1) or remove (0) the sysctl
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*
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* Add or remove the debug sysctl. Return 0 on success or -errno on error.
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*/
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int ntfs_sysctl(int add)
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{
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if (add) {
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BUG_ON(sysctls_root_table);
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sysctls_root_table = register_sysctl_table(sysctls_root, 0);
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if (!sysctls_root_table)
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return -ENOMEM;
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#ifdef CONFIG_PROC_FS
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/*
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* If the proc filesystem is in use and we are a module, need
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* to set the owner of our proc entry to our module. In the
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* non-modular case, THIS_MODULE is NULL, so this is ok.
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*/
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ntfs_sysctls[0].de->owner = THIS_MODULE;
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#endif
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} else {
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BUG_ON(!sysctls_root_table);
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unregister_sysctl_table(sysctls_root_table);
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sysctls_root_table = NULL;
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}
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return 0;
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}
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#endif /* CONFIG_SYSCTL */
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#endif /* DEBUG */
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