a1d312de77
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 43 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520075212.517001706@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* usnjrnl.h - NTFS kernel transaction log ($UsnJrnl) handling. Part of the
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* Linux-NTFS project.
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*
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* Copyright (c) 2005 Anton Altaparmakov
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*/
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#ifdef NTFS_RW
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#include <linux/fs.h>
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#include <linux/highmem.h>
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#include <linux/mm.h>
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#include "aops.h"
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#include "debug.h"
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#include "endian.h"
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#include "time.h"
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#include "types.h"
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#include "usnjrnl.h"
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#include "volume.h"
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/**
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* ntfs_stamp_usnjrnl - stamp the transaction log ($UsnJrnl) on an ntfs volume
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* @vol: ntfs volume on which to stamp the transaction log
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*
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* Stamp the transaction log ($UsnJrnl) on the ntfs volume @vol and return
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* 'true' on success and 'false' on error.
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*
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* This function assumes that the transaction log has already been loaded and
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* consistency checked by a call to fs/ntfs/super.c::load_and_init_usnjrnl().
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*/
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bool ntfs_stamp_usnjrnl(ntfs_volume *vol)
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{
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ntfs_debug("Entering.");
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if (likely(!NVolUsnJrnlStamped(vol))) {
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sle64 stamp;
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struct page *page;
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USN_HEADER *uh;
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page = ntfs_map_page(vol->usnjrnl_max_ino->i_mapping, 0);
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if (IS_ERR(page)) {
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ntfs_error(vol->sb, "Failed to read from "
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"$UsnJrnl/$DATA/$Max attribute.");
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return false;
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}
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uh = (USN_HEADER*)page_address(page);
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stamp = get_current_ntfs_time();
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ntfs_debug("Stamping transaction log ($UsnJrnl): old "
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"journal_id 0x%llx, old lowest_valid_usn "
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"0x%llx, new journal_id 0x%llx, new "
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"lowest_valid_usn 0x%llx.",
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(long long)sle64_to_cpu(uh->journal_id),
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(long long)sle64_to_cpu(uh->lowest_valid_usn),
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(long long)sle64_to_cpu(stamp),
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i_size_read(vol->usnjrnl_j_ino));
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uh->lowest_valid_usn =
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cpu_to_sle64(i_size_read(vol->usnjrnl_j_ino));
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uh->journal_id = stamp;
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flush_dcache_page(page);
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set_page_dirty(page);
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ntfs_unmap_page(page);
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/* Set the flag so we do not have to do it again on remount. */
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NVolSetUsnJrnlStamped(vol);
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}
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ntfs_debug("Done.");
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return true;
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}
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#endif /* NTFS_RW */
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