/* * 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 */