85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
|
/*
|
||
|
|
* usnjrnl.h - NTFS kernel transaction log ($UsnJrnl) handling. Part of the
|
||
|
|
* Linux-NTFS project.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2005 Anton Altaparmakov
|
||
|
|
*
|
||
|
|
* This program/include file is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as published
|
||
|
|
* by the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program/include file is distributed in the hope that it will be
|
||
|
|
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
||
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program (in the main directory of the Linux-NTFS
|
||
|
|
* distribution in the file COPYING); if not, write to the Free Software
|
||
|
|
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef NTFS_RW
|
||
|
|
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/highmem.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
|
||
|
|
#include "aops.h"
|
||
|
|
#include "debug.h"
|
||
|
|
#include "endian.h"
|
||
|
|
#include "time.h"
|
||
|
|
#include "types.h"
|
||
|
|
#include "usnjrnl.h"
|
||
|
|
#include "volume.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ntfs_stamp_usnjrnl - stamp the transaction log ($UsnJrnl) on an ntfs volume
|
||
|
|
* @vol: ntfs volume on which to stamp the transaction log
|
||
|
|
*
|
||
|
|
* Stamp the transaction log ($UsnJrnl) on the ntfs volume @vol and return
|
||
|
|
* TRUE on success and FALSE on error.
|
||
|
|
*
|
||
|
|
* This function assumes that the transaction log has already been loaded and
|
||
|
|
* consistency checked by a call to fs/ntfs/super.c::load_and_init_usnjrnl().
|
||
|
|
*/
|
||
|
|
BOOL ntfs_stamp_usnjrnl(ntfs_volume *vol)
|
||
|
|
{
|
||
|
|
ntfs_debug("Entering.");
|
||
|
|
if (likely(!NVolUsnJrnlStamped(vol))) {
|
||
|
|
sle64 stamp;
|
||
|
|
struct page *page;
|
||
|
|
USN_HEADER *uh;
|
||
|
|
|
||
|
|
page = ntfs_map_page(vol->usnjrnl_max_ino->i_mapping, 0);
|
||
|
|
if (IS_ERR(page)) {
|
||
|
|
ntfs_error(vol->sb, "Failed to read from "
|
||
|
|
"$UsnJrnl/$DATA/$Max attribute.");
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
uh = (USN_HEADER*)page_address(page);
|
||
|
|
stamp = get_current_ntfs_time();
|
||
|
|
ntfs_debug("Stamping transaction log ($UsnJrnl): old "
|
||
|
|
"journal_id 0x%llx, old lowest_valid_usn "
|
||
|
|
"0x%llx, new journal_id 0x%llx, new "
|
||
|
|
"lowest_valid_usn 0x%llx.",
|
||
|
|
(long long)sle64_to_cpu(uh->journal_id),
|
||
|
|
(long long)sle64_to_cpu(uh->lowest_valid_usn),
|
||
|
|
(long long)sle64_to_cpu(stamp),
|
||
|
|
i_size_read(vol->usnjrnl_j_ino));
|
||
|
|
uh->lowest_valid_usn =
|
||
|
|
cpu_to_sle64(i_size_read(vol->usnjrnl_j_ino));
|
||
|
|
uh->journal_id = stamp;
|
||
|
|
flush_dcache_page(page);
|
||
|
|
set_page_dirty(page);
|
||
|
|
ntfs_unmap_page(page);
|
||
|
|
/* Set the flag so we do not have to do it again on remount. */
|
||
|
|
NVolSetUsnJrnlStamped(vol);
|
||
|
|
}
|
||
|
|
ntfs_debug("Done.");
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* NTFS_RW */
|