mirror of
https://github.com/wiidev/usbloadergx.git
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1595 lines
42 KiB
C
1595 lines
42 KiB
C
/**
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* volume.c - NTFS volume handling code. Originated from the Linux-NTFS project.
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*
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* Copyright (c) 2000-2006 Anton Altaparmakov
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* Copyright (c) 2002-2009 Szabolcs Szakacsits
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* Copyright (c) 2004-2005 Richard Russon
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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 NTFS-3G
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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 HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#include "compat.h"
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#include "volume.h"
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#include "attrib.h"
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#include "mft.h"
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#include "bootsect.h"
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#include "device.h"
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#include "debug.h"
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#include "inode.h"
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#include "runlist.h"
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#include "logfile.h"
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#include "dir.h"
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#include "logging.h"
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#include "misc.h"
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const char *ntfs_home =
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"Ntfs-3g news, support and information: http://ntfs-3g.org\n";
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static const char *invalid_ntfs_msg =
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"The device '%s' doesn't seem to have a valid NTFS.\n"
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"Maybe the wrong device is used? Or the whole disk instead of a\n"
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"partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?\n";
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static const char *corrupt_volume_msg =
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"NTFS is either inconsistent, or there is a hardware fault, or it's a\n"
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"SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows\n"
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"then reboot into Windows twice. The usage of the /f parameter is very\n"
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"important! If the device is a SoftRAID/FakeRAID then first activate\n"
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"it and mount a different device under the /dev/mapper/ directory, (e.g.\n"
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"/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation\n"
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"for more details.\n";
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static const char *hibernated_volume_msg =
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"The NTFS partition is hibernated. Please resume and shutdown Windows\n"
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"properly, or mount the volume read-only with the 'ro' mount option, or\n"
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"mount the volume read-write with the 'remove_hiberfile' mount option.\n"
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"For example type on the command line:\n"
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"\n"
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" mount -t ntfs-3g -o remove_hiberfile %s %s\n"
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"\n";
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static const char *unclean_journal_msg =
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"Write access is denied because the disk wasn't safely powered\n"
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"off and the 'norecover' mount option was specified.\n";
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static const char *opened_volume_msg =
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"Mount is denied because the NTFS volume is already exclusively opened.\n"
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"The volume may be already mounted, or another software may use it which\n"
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"could be identified for example by the help of the 'fuser' command.\n";
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static const char *fakeraid_msg =
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"Either the device is missing or it's powered down, or you have\n"
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"SoftRAID hardware and must use an activated, different device under\n"
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"/dev/mapper/, (e.g. /dev/mapper/nvidia_eahaabcc1) to mount NTFS.\n"
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"Please see the 'dmraid' documentation for help.\n";
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static const char *access_denied_msg =
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"Please check '%s' and the ntfs-3g binary permissions,\n"
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"and the mounting user ID. More explanation is provided at\n"
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"http://ntfs-3g.org/support.html#unprivileged\n";
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/**
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* ntfs_volume_alloc - Create an NTFS volume object and initialise it
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*
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* Description...
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*
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* Returns:
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*/
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ntfs_volume *ntfs_volume_alloc(void)
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{
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return ntfs_calloc(sizeof(ntfs_volume));
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}
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static void ntfs_attr_free(ntfs_attr **na)
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{
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if (na && *na) {
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ntfs_attr_close(*na);
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*na = NULL;
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}
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}
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static int ntfs_inode_free(ntfs_inode **ni)
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{
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int ret = -1;
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if (ni && *ni) {
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ret = ntfs_inode_close(*ni);
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*ni = NULL;
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}
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return ret;
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}
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static void ntfs_error_set(int *err)
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{
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if (!*err)
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*err = errno;
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}
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/**
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* __ntfs_volume_release - Destroy an NTFS volume object
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* @v:
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*
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* Description...
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*
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* Returns:
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*/
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static int __ntfs_volume_release(ntfs_volume *v)
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{
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int err = 0;
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if (ntfs_inode_free(&v->vol_ni))
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ntfs_error_set(&err);
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/*
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* FIXME: Inodes must be synced before closing
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* attributes, otherwise unmount could fail.
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*/
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if (v->lcnbmp_ni && NInoDirty(v->lcnbmp_ni))
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ntfs_inode_sync(v->lcnbmp_ni);
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ntfs_attr_free(&v->lcnbmp_na);
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if (ntfs_inode_free(&v->lcnbmp_ni))
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ntfs_error_set(&err);
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if (v->mft_ni && NInoDirty(v->mft_ni))
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ntfs_inode_sync(v->mft_ni);
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ntfs_attr_free(&v->mftbmp_na);
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ntfs_attr_free(&v->mft_na);
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if (ntfs_inode_free(&v->mft_ni))
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ntfs_error_set(&err);
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if (v->mftmirr_ni && NInoDirty(v->mftmirr_ni))
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ntfs_inode_sync(v->mftmirr_ni);
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ntfs_attr_free(&v->mftmirr_na);
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if (ntfs_inode_free(&v->mftmirr_ni))
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ntfs_error_set(&err);
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if (v->dev) {
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struct ntfs_device *dev = v->dev;
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if (dev->d_ops->sync(dev))
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ntfs_error_set(&err);
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if (dev->d_ops->close(dev))
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ntfs_error_set(&err);
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}
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ntfs_free_lru_caches(v);
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free(v->vol_name);
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free(v->upcase);
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free(v->attrdef);
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free(v);
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errno = err;
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return errno ? -1 : 0;
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}
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static void ntfs_attr_setup_flag(ntfs_inode *ni)
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{
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STANDARD_INFORMATION *si;
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si = ntfs_attr_readall(ni, AT_STANDARD_INFORMATION, AT_UNNAMED, 0, NULL);
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if (si) {
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ni->flags = si->file_attributes;
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free(si);
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}
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}
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/**
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* ntfs_mft_load - load the $MFT and setup the ntfs volume with it
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* @vol: ntfs volume whose $MFT to load
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*
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* Load $MFT from @vol and setup @vol with it. After calling this function the
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* volume @vol is ready for use by all read access functions provided by the
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* ntfs library.
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*
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* Return 0 on success and -1 on error with errno set to the error code.
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*/
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static int ntfs_mft_load(ntfs_volume *vol)
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{
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VCN next_vcn, last_vcn, highest_vcn;
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s64 l;
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MFT_RECORD *mb = NULL;
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ntfs_attr_search_ctx *ctx = NULL;
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ATTR_RECORD *a;
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int eo;
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/* Manually setup an ntfs_inode. */
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vol->mft_ni = ntfs_inode_allocate(vol);
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mb = ntfs_malloc(vol->mft_record_size);
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if (!vol->mft_ni || !mb) {
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ntfs_log_perror("Error allocating memory for $MFT");
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goto error_exit;
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}
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vol->mft_ni->mft_no = 0;
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vol->mft_ni->mrec = mb;
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/* Can't use any of the higher level functions yet! */
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l = ntfs_mst_pread(vol->dev, vol->mft_lcn << vol->cluster_size_bits, 1,
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vol->mft_record_size, mb);
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if (l != 1) {
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if (l != -1)
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errno = EIO;
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ntfs_log_perror("Error reading $MFT");
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goto error_exit;
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}
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if (ntfs_mft_record_check(vol, 0, mb))
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goto error_exit;
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ctx = ntfs_attr_get_search_ctx(vol->mft_ni, NULL);
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if (!ctx)
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goto error_exit;
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/* Find the $ATTRIBUTE_LIST attribute in $MFT if present. */
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if (ntfs_attr_lookup(AT_ATTRIBUTE_LIST, AT_UNNAMED, 0, 0, 0, NULL, 0,
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ctx)) {
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if (errno != ENOENT) {
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ntfs_log_error("$MFT has corrupt attribute list.\n");
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goto io_error_exit;
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}
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goto mft_has_no_attr_list;
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}
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NInoSetAttrList(vol->mft_ni);
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l = ntfs_get_attribute_value_length(ctx->attr);
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if (l <= 0 || l > 0x40000) {
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ntfs_log_error("$MFT/$ATTR_LIST invalid length (%lld).\n",
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(long long)l);
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goto io_error_exit;
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}
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vol->mft_ni->attr_list_size = l;
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vol->mft_ni->attr_list = ntfs_malloc(l);
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if (!vol->mft_ni->attr_list)
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goto error_exit;
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l = ntfs_get_attribute_value(vol, ctx->attr, vol->mft_ni->attr_list);
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if (!l) {
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ntfs_log_error("Failed to get value of $MFT/$ATTR_LIST.\n");
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goto io_error_exit;
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}
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if (l != vol->mft_ni->attr_list_size) {
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ntfs_log_error("Partial read of $MFT/$ATTR_LIST (%lld != "
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"%u).\n", (long long)l,
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vol->mft_ni->attr_list_size);
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goto io_error_exit;
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}
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mft_has_no_attr_list:
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ntfs_attr_setup_flag(vol->mft_ni);
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/* We now have a fully setup ntfs inode for $MFT in vol->mft_ni. */
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/* Get an ntfs attribute for $MFT/$DATA and set it up, too. */
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vol->mft_na = ntfs_attr_open(vol->mft_ni, AT_DATA, AT_UNNAMED, 0);
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if (!vol->mft_na) {
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ntfs_log_perror("Failed to open ntfs attribute");
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goto error_exit;
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}
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/* Read all extents from the $DATA attribute in $MFT. */
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ntfs_attr_reinit_search_ctx(ctx);
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last_vcn = vol->mft_na->allocated_size >> vol->cluster_size_bits;
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highest_vcn = next_vcn = 0;
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a = NULL;
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while (!ntfs_attr_lookup(AT_DATA, AT_UNNAMED, 0, 0, next_vcn, NULL, 0,
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ctx)) {
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runlist_element *nrl;
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a = ctx->attr;
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/* $MFT must be non-resident. */
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if (!a->non_resident) {
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ntfs_log_error("$MFT must be non-resident.\n");
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goto io_error_exit;
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}
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/* $MFT must be uncompressed and unencrypted. */
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if (a->flags & ATTR_COMPRESSION_MASK ||
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a->flags & ATTR_IS_ENCRYPTED) {
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ntfs_log_error("$MFT must be uncompressed and "
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"unencrypted.\n");
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goto io_error_exit;
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}
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/*
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* Decompress the mapping pairs array of this extent and merge
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* the result into the existing runlist. No need for locking
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* as we have exclusive access to the inode at this time and we
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* are a mount in progress task, too.
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*/
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nrl = ntfs_mapping_pairs_decompress(vol, a, vol->mft_na->rl);
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if (!nrl) {
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ntfs_log_perror("ntfs_mapping_pairs_decompress() failed");
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goto error_exit;
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}
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vol->mft_na->rl = nrl;
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/* Get the lowest vcn for the next extent. */
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highest_vcn = sle64_to_cpu(a->highest_vcn);
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next_vcn = highest_vcn + 1;
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/* Only one extent or error, which we catch below. */
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if (next_vcn <= 0)
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break;
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/* Avoid endless loops due to corruption. */
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if (next_vcn < sle64_to_cpu(a->lowest_vcn)) {
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ntfs_log_error("$MFT has corrupt attribute list.\n");
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goto io_error_exit;
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}
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}
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if (!a) {
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ntfs_log_error("$MFT/$DATA attribute not found.\n");
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goto io_error_exit;
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}
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if (highest_vcn && highest_vcn != last_vcn - 1) {
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ntfs_log_error("Failed to load runlist for $MFT/$DATA.\n");
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ntfs_log_error("highest_vcn = 0x%llx, last_vcn - 1 = 0x%llx\n",
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(long long)highest_vcn, (long long)last_vcn - 1);
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goto io_error_exit;
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}
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/* Done with the $Mft mft record. */
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ntfs_attr_put_search_ctx(ctx);
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ctx = NULL;
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/*
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* The volume is now setup so we can use all read access functions.
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*/
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vol->mftbmp_na = ntfs_attr_open(vol->mft_ni, AT_BITMAP, AT_UNNAMED, 0);
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if (!vol->mftbmp_na) {
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ntfs_log_perror("Failed to open $MFT/$BITMAP");
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goto error_exit;
|
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}
|
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return 0;
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io_error_exit:
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errno = EIO;
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error_exit:
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eo = errno;
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if (ctx)
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ntfs_attr_put_search_ctx(ctx);
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if (vol->mft_na) {
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ntfs_attr_close(vol->mft_na);
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vol->mft_na = NULL;
|
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}
|
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if (vol->mft_ni) {
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ntfs_inode_close(vol->mft_ni);
|
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vol->mft_ni = NULL;
|
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}
|
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errno = eo;
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return -1;
|
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}
|
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|
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/**
|
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* ntfs_mftmirr_load - load the $MFTMirr and setup the ntfs volume with it
|
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* @vol: ntfs volume whose $MFTMirr to load
|
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*
|
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* Load $MFTMirr from @vol and setup @vol with it. After calling this function
|
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* the volume @vol is ready for use by all write access functions provided by
|
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* the ntfs library (assuming ntfs_mft_load() has been called successfully
|
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* beforehand).
|
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*
|
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* Return 0 on success and -1 on error with errno set to the error code.
|
|
*/
|
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static int ntfs_mftmirr_load(ntfs_volume *vol)
|
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{
|
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int err;
|
|
|
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vol->mftmirr_ni = ntfs_inode_open(vol, FILE_MFTMirr);
|
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if (!vol->mftmirr_ni) {
|
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ntfs_log_perror("Failed to open inode $MFTMirr");
|
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return -1;
|
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}
|
|
|
|
vol->mftmirr_na = ntfs_attr_open(vol->mftmirr_ni, AT_DATA, AT_UNNAMED, 0);
|
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if (!vol->mftmirr_na) {
|
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ntfs_log_perror("Failed to open $MFTMirr/$DATA");
|
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goto error_exit;
|
|
}
|
|
|
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if (ntfs_attr_map_runlist(vol->mftmirr_na, 0) < 0) {
|
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ntfs_log_perror("Failed to map runlist of $MFTMirr/$DATA");
|
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goto error_exit;
|
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}
|
|
|
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return 0;
|
|
|
|
error_exit:
|
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err = errno;
|
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if (vol->mftmirr_na) {
|
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ntfs_attr_close(vol->mftmirr_na);
|
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vol->mftmirr_na = NULL;
|
|
}
|
|
ntfs_inode_close(vol->mftmirr_ni);
|
|
vol->mftmirr_ni = NULL;
|
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errno = err;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* ntfs_volume_startup - allocate and setup an ntfs volume
|
|
* @dev: device to open
|
|
* @flags: optional mount flags
|
|
*
|
|
* Load, verify, and parse bootsector; load and setup $MFT and $MFTMirr. After
|
|
* calling this function, the volume is setup sufficiently to call all read
|
|
* and write access functions provided by the library.
|
|
*
|
|
* Return the allocated volume structure on success and NULL on error with
|
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* errno set to the error code.
|
|
*/
|
|
ntfs_volume *ntfs_volume_startup(struct ntfs_device *dev, unsigned long flags)
|
|
{
|
|
LCN mft_zone_size, mft_lcn;
|
|
s64 br;
|
|
ntfs_volume *vol;
|
|
NTFS_BOOT_SECTOR *bs;
|
|
int eo;
|
|
|
|
if (!dev || !dev->d_ops || !dev->d_name) {
|
|
errno = EINVAL;
|
|
ntfs_log_perror("%s: dev = %p", __FUNCTION__, dev);
|
|
return NULL;
|
|
}
|
|
|
|
bs = ntfs_malloc(sizeof(NTFS_BOOT_SECTOR));
|
|
if (!bs)
|
|
return NULL;
|
|
|
|
/* Allocate the volume structure. */
|
|
vol = ntfs_volume_alloc();
|
|
if (!vol)
|
|
goto error_exit;
|
|
|
|
/* Create the default upcase table. */
|
|
vol->upcase_len = 65536;
|
|
vol->upcase = ntfs_malloc(vol->upcase_len * sizeof(ntfschar));
|
|
if (!vol->upcase)
|
|
goto error_exit;
|
|
|
|
ntfs_upcase_table_build(vol->upcase,
|
|
vol->upcase_len * sizeof(ntfschar));
|
|
|
|
if (flags & MS_RDONLY)
|
|
NVolSetReadOnly(vol);
|
|
|
|
/* ...->open needs bracketing to compile with glibc 2.7 */
|
|
if ((dev->d_ops->open)(dev, NVolReadOnly(vol) ? O_RDONLY: O_RDWR)) {
|
|
ntfs_log_perror("Error opening '%s'", dev->d_name);
|
|
goto error_exit;
|
|
}
|
|
/* Attach the device to the volume. */
|
|
vol->dev = dev;
|
|
|
|
/* Now read the bootsector. */
|
|
br = ntfs_pread(dev, 0, sizeof(NTFS_BOOT_SECTOR), bs);
|
|
if (br != sizeof(NTFS_BOOT_SECTOR)) {
|
|
if (br != -1)
|
|
errno = EINVAL;
|
|
if (!br)
|
|
ntfs_log_error("Failed to read bootsector (size=0)\n");
|
|
else
|
|
ntfs_log_perror("Error reading bootsector");
|
|
goto error_exit;
|
|
}
|
|
if (!ntfs_boot_sector_is_ntfs(bs)) {
|
|
errno = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
if (ntfs_boot_sector_parse(vol, bs) < 0)
|
|
goto error_exit;
|
|
|
|
free(bs);
|
|
bs = NULL;
|
|
/* Now set the device block size to the sector size. */
|
|
if (ntfs_device_block_size_set(vol->dev, vol->sector_size))
|
|
ntfs_log_debug("Failed to set the device block size to the "
|
|
"sector size. This may affect performance "
|
|
"but should be harmless otherwise. Error: "
|
|
"%s\n", strerror(errno));
|
|
|
|
/* We now initialize the cluster allocator. */
|
|
vol->full_zones = 0;
|
|
mft_zone_size = vol->nr_clusters >> 3; /* 12.5% */
|
|
|
|
/* Setup the mft zone. */
|
|
vol->mft_zone_start = vol->mft_zone_pos = vol->mft_lcn;
|
|
ntfs_log_debug("mft_zone_pos = 0x%llx\n", (long long)vol->mft_zone_pos);
|
|
|
|
/*
|
|
* Calculate the mft_lcn for an unmodified NTFS volume (see mkntfs
|
|
* source) and if the actual mft_lcn is in the expected place or even
|
|
* further to the front of the volume, extend the mft_zone to cover the
|
|
* beginning of the volume as well. This is in order to protect the
|
|
* area reserved for the mft bitmap as well within the mft_zone itself.
|
|
* On non-standard volumes we don't protect it as the overhead would be
|
|
* higher than the speed increase we would get by doing it.
|
|
*/
|
|
mft_lcn = (8192 + 2 * vol->cluster_size - 1) / vol->cluster_size;
|
|
if (mft_lcn * vol->cluster_size < 16 * 1024)
|
|
mft_lcn = (16 * 1024 + vol->cluster_size - 1) /
|
|
vol->cluster_size;
|
|
if (vol->mft_zone_start <= mft_lcn)
|
|
vol->mft_zone_start = 0;
|
|
ntfs_log_debug("mft_zone_start = 0x%llx\n", (long long)vol->mft_zone_start);
|
|
|
|
/*
|
|
* Need to cap the mft zone on non-standard volumes so that it does
|
|
* not point outside the boundaries of the volume. We do this by
|
|
* halving the zone size until we are inside the volume.
|
|
*/
|
|
vol->mft_zone_end = vol->mft_lcn + mft_zone_size;
|
|
while (vol->mft_zone_end >= vol->nr_clusters) {
|
|
mft_zone_size >>= 1;
|
|
vol->mft_zone_end = vol->mft_lcn + mft_zone_size;
|
|
}
|
|
ntfs_log_debug("mft_zone_end = 0x%llx\n", (long long)vol->mft_zone_end);
|
|
|
|
/*
|
|
* Set the current position within each data zone to the start of the
|
|
* respective zone.
|
|
*/
|
|
vol->data1_zone_pos = vol->mft_zone_end;
|
|
ntfs_log_debug("data1_zone_pos = %lld\n", (long long)vol->data1_zone_pos);
|
|
vol->data2_zone_pos = 0;
|
|
ntfs_log_debug("data2_zone_pos = %lld\n", (long long)vol->data2_zone_pos);
|
|
|
|
/* Set the mft data allocation position to mft record 24. */
|
|
vol->mft_data_pos = 24;
|
|
|
|
/*
|
|
* The cluster allocator is now fully operational.
|
|
*/
|
|
|
|
/* Need to setup $MFT so we can use the library read functions. */
|
|
if (ntfs_mft_load(vol) < 0) {
|
|
ntfs_log_perror("Failed to load $MFT");
|
|
goto error_exit;
|
|
}
|
|
|
|
/* Need to setup $MFTMirr so we can use the write functions, too. */
|
|
if (ntfs_mftmirr_load(vol) < 0) {
|
|
ntfs_log_perror("Failed to load $MFTMirr");
|
|
goto error_exit;
|
|
}
|
|
return vol;
|
|
error_exit:
|
|
eo = errno;
|
|
free(bs);
|
|
if (vol)
|
|
__ntfs_volume_release(vol);
|
|
errno = eo;
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* ntfs_volume_check_logfile - check logfile on target volume
|
|
* @vol: volume on which to check logfile
|
|
*
|
|
* Return 0 on success and -1 on error with errno set error code.
|
|
*/
|
|
static int ntfs_volume_check_logfile(ntfs_volume *vol)
|
|
{
|
|
ntfs_inode *ni;
|
|
ntfs_attr *na = NULL;
|
|
RESTART_PAGE_HEADER *rp = NULL;
|
|
int err = 0;
|
|
|
|
ni = ntfs_inode_open(vol, FILE_LogFile);
|
|
if (!ni) {
|
|
ntfs_log_perror("Failed to open inode FILE_LogFile");
|
|
errno = EIO;
|
|
return -1;
|
|
}
|
|
|
|
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
|
|
if (!na) {
|
|
ntfs_log_perror("Failed to open $FILE_LogFile/$DATA");
|
|
err = EIO;
|
|
goto out;
|
|
}
|
|
|
|
if (!ntfs_check_logfile(na, &rp) || !ntfs_is_logfile_clean(na, rp))
|
|
err = EOPNOTSUPP;
|
|
free(rp);
|
|
ntfs_attr_close(na);
|
|
out:
|
|
if (ntfs_inode_close(ni))
|
|
ntfs_error_set(&err);
|
|
if (err) {
|
|
errno = err;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ntfs_hiberfile_open - Find and open '/hiberfil.sys'
|
|
* @vol: An ntfs volume obtained from ntfs_mount
|
|
*
|
|
* Return: inode Success, hiberfil.sys is valid
|
|
* NULL hiberfil.sys doesn't exist or some other error occurred
|
|
*/
|
|
static ntfs_inode *ntfs_hiberfile_open(ntfs_volume *vol)
|
|
{
|
|
u64 inode;
|
|
ntfs_inode *ni_root;
|
|
ntfs_inode *ni_hibr = NULL;
|
|
ntfschar *unicode = NULL;
|
|
int unicode_len;
|
|
const char *hiberfile = "hiberfil.sys";
|
|
|
|
if (!vol) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
ni_root = ntfs_inode_open(vol, FILE_root);
|
|
if (!ni_root) {
|
|
ntfs_log_debug("Couldn't open the root directory.\n");
|
|
return NULL;
|
|
}
|
|
|
|
unicode_len = ntfs_mbstoucs(hiberfile, &unicode);
|
|
if (unicode_len < 0) {
|
|
ntfs_log_perror("Couldn't convert 'hiberfil.sys' to Unicode");
|
|
goto out;
|
|
}
|
|
|
|
inode = ntfs_inode_lookup_by_name(ni_root, unicode, unicode_len);
|
|
if (inode == (u64)-1) {
|
|
ntfs_log_debug("Couldn't find file '%s'.\n", hiberfile);
|
|
goto out;
|
|
}
|
|
|
|
inode = MREF(inode);
|
|
ni_hibr = ntfs_inode_open(vol, inode);
|
|
if (!ni_hibr) {
|
|
ntfs_log_debug("Couldn't open inode %lld.\n", (long long)inode);
|
|
goto out;
|
|
}
|
|
out:
|
|
if (ntfs_inode_close(ni_root)) {
|
|
ntfs_inode_close(ni_hibr);
|
|
ni_hibr = NULL;
|
|
}
|
|
free(unicode);
|
|
return ni_hibr;
|
|
}
|
|
|
|
|
|
#define NTFS_HIBERFILE_HEADER_SIZE 4096
|
|
|
|
/**
|
|
* ntfs_volume_check_hiberfile - check hiberfil.sys whether Windows is
|
|
* hibernated on the target volume
|
|
* @vol: volume on which to check hiberfil.sys
|
|
*
|
|
* Return: 0 if Windows isn't hibernated for sure
|
|
* -1 otherwise and errno is set to the appropriate value
|
|
*/
|
|
int ntfs_volume_check_hiberfile(ntfs_volume *vol, int verbose)
|
|
{
|
|
ntfs_inode *ni;
|
|
ntfs_attr *na = NULL;
|
|
int bytes_read, err;
|
|
char *buf = NULL;
|
|
|
|
ni = ntfs_hiberfile_open(vol);
|
|
if (!ni) {
|
|
if (errno == ENOENT)
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
buf = ntfs_malloc(NTFS_HIBERFILE_HEADER_SIZE);
|
|
if (!buf)
|
|
goto out;
|
|
|
|
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
|
|
if (!na) {
|
|
ntfs_log_perror("Failed to open hiberfil.sys data attribute");
|
|
goto out;
|
|
}
|
|
|
|
bytes_read = ntfs_attr_pread(na, 0, NTFS_HIBERFILE_HEADER_SIZE, buf);
|
|
if (bytes_read == -1) {
|
|
ntfs_log_perror("Failed to read hiberfil.sys");
|
|
goto out;
|
|
}
|
|
if (bytes_read < NTFS_HIBERFILE_HEADER_SIZE) {
|
|
if (verbose)
|
|
ntfs_log_error("Hibernated non-system partition, "
|
|
"refused to mount.\n");
|
|
errno = EPERM;
|
|
goto out;
|
|
}
|
|
if (memcmp(buf, "hibr", 4) == 0) {
|
|
if (verbose)
|
|
ntfs_log_error("Windows is hibernated, refused to mount.\n");
|
|
errno = EPERM;
|
|
goto out;
|
|
}
|
|
/* All right, all header bytes are zero */
|
|
errno = 0;
|
|
out:
|
|
if (na)
|
|
ntfs_attr_close(na);
|
|
free(buf);
|
|
err = errno;
|
|
if (ntfs_inode_close(ni))
|
|
ntfs_error_set(&err);
|
|
errno = err;
|
|
return errno ? -1 : 0;
|
|
}
|
|
|
|
/**
|
|
* ntfs_device_mount - open ntfs volume
|
|
* @dev: device to open
|
|
* @flags: optional mount flags
|
|
*
|
|
* This function mounts an ntfs volume. @dev should describe the device which
|
|
* to mount as the ntfs volume.
|
|
*
|
|
* @flags is an optional second parameter. The same flags are used as for
|
|
* the mount system call (man 2 mount). Currently only the following flag
|
|
* is implemented:
|
|
* MS_RDONLY - mount volume read-only
|
|
*
|
|
* The function opens the device @dev and verifies that it contains a valid
|
|
* bootsector. Then, it allocates an ntfs_volume structure and initializes
|
|
* some of the values inside the structure from the information stored in the
|
|
* bootsector. It proceeds to load the necessary system files and completes
|
|
* setting up the structure.
|
|
*
|
|
* Return the allocated volume structure on success and NULL on error with
|
|
* errno set to the error code.
|
|
*/
|
|
ntfs_volume *ntfs_device_mount(struct ntfs_device *dev, unsigned long flags)
|
|
{
|
|
s64 l;
|
|
ntfs_volume *vol;
|
|
u8 *m = NULL, *m2 = NULL;
|
|
ntfs_attr_search_ctx *ctx = NULL;
|
|
ntfs_inode *ni;
|
|
ntfs_attr *na;
|
|
ATTR_RECORD *a;
|
|
VOLUME_INFORMATION *vinf;
|
|
ntfschar *vname;
|
|
int i, j, eo;
|
|
u32 u;
|
|
|
|
vol = ntfs_volume_startup(dev, flags);
|
|
if (!vol)
|
|
return NULL;
|
|
|
|
/* Load data from $MFT and $MFTMirr and compare the contents. */
|
|
m = ntfs_malloc(vol->mftmirr_size << vol->mft_record_size_bits);
|
|
m2 = ntfs_malloc(vol->mftmirr_size << vol->mft_record_size_bits);
|
|
if (!m || !m2)
|
|
goto error_exit;
|
|
|
|
l = ntfs_attr_mst_pread(vol->mft_na, 0, vol->mftmirr_size,
|
|
vol->mft_record_size, m);
|
|
if (l != vol->mftmirr_size) {
|
|
if (l == -1)
|
|
ntfs_log_perror("Failed to read $MFT");
|
|
else {
|
|
ntfs_log_error("Failed to read $MFT, unexpected length "
|
|
"(%lld != %d).\n", (long long)l,
|
|
vol->mftmirr_size);
|
|
errno = EIO;
|
|
}
|
|
goto error_exit;
|
|
}
|
|
l = ntfs_attr_mst_pread(vol->mftmirr_na, 0, vol->mftmirr_size,
|
|
vol->mft_record_size, m2);
|
|
if (l != vol->mftmirr_size) {
|
|
if (l == -1) {
|
|
ntfs_log_perror("Failed to read $MFTMirr");
|
|
goto error_exit;
|
|
}
|
|
vol->mftmirr_size = l;
|
|
}
|
|
ntfs_log_debug("Comparing $MFTMirr to $MFT...\n");
|
|
for (i = 0; i < vol->mftmirr_size; ++i) {
|
|
MFT_RECORD *mrec, *mrec2;
|
|
const char *ESTR[12] = { "$MFT", "$MFTMirr", "$LogFile",
|
|
"$Volume", "$AttrDef", "root directory", "$Bitmap",
|
|
"$Boot", "$BadClus", "$Secure", "$UpCase", "$Extend" };
|
|
const char *s;
|
|
|
|
if (i < 12)
|
|
s = ESTR[i];
|
|
else if (i < 16)
|
|
s = "system file";
|
|
else
|
|
s = "mft record";
|
|
|
|
mrec = (MFT_RECORD*)(m + i * vol->mft_record_size);
|
|
if (mrec->flags & MFT_RECORD_IN_USE) {
|
|
if (ntfs_is_baad_recordp(mrec)) {
|
|
ntfs_log_error("$MFT error: Incomplete multi "
|
|
"sector transfer detected in "
|
|
"'%s'.\n", s);
|
|
goto io_error_exit;
|
|
}
|
|
if (!ntfs_is_mft_recordp(mrec)) {
|
|
ntfs_log_error("$MFT error: Invalid mft "
|
|
"record for '%s'.\n", s);
|
|
goto io_error_exit;
|
|
}
|
|
}
|
|
mrec2 = (MFT_RECORD*)(m2 + i * vol->mft_record_size);
|
|
if (mrec2->flags & MFT_RECORD_IN_USE) {
|
|
if (ntfs_is_baad_recordp(mrec2)) {
|
|
ntfs_log_error("$MFTMirr error: Incomplete "
|
|
"multi sector transfer "
|
|
"detected in '%s'.\n", s);
|
|
goto io_error_exit;
|
|
}
|
|
if (!ntfs_is_mft_recordp(mrec2)) {
|
|
ntfs_log_error("$MFTMirr error: Invalid mft "
|
|
"record for '%s'.\n", s);
|
|
goto io_error_exit;
|
|
}
|
|
}
|
|
if (memcmp(mrec, mrec2, ntfs_mft_record_get_data_size(mrec))) {
|
|
ntfs_log_error("$MFTMirr does not match $MFT (record "
|
|
"%d).\n", i);
|
|
goto io_error_exit;
|
|
}
|
|
}
|
|
|
|
free(m2);
|
|
free(m);
|
|
m = m2 = NULL;
|
|
|
|
/* Now load the bitmap from $Bitmap. */
|
|
ntfs_log_debug("Loading $Bitmap...\n");
|
|
vol->lcnbmp_ni = ntfs_inode_open(vol, FILE_Bitmap);
|
|
if (!vol->lcnbmp_ni) {
|
|
ntfs_log_perror("Failed to open inode FILE_Bitmap");
|
|
goto error_exit;
|
|
}
|
|
|
|
vol->lcnbmp_na = ntfs_attr_open(vol->lcnbmp_ni, AT_DATA, AT_UNNAMED, 0);
|
|
if (!vol->lcnbmp_na) {
|
|
ntfs_log_perror("Failed to open ntfs attribute");
|
|
goto error_exit;
|
|
}
|
|
|
|
if (vol->lcnbmp_na->data_size > vol->lcnbmp_na->allocated_size) {
|
|
ntfs_log_error("Corrupt cluster map size (%lld > %lld)\n",
|
|
(long long)vol->lcnbmp_na->data_size,
|
|
(long long)vol->lcnbmp_na->allocated_size);
|
|
goto io_error_exit;
|
|
}
|
|
|
|
/* Now load the upcase table from $UpCase. */
|
|
ntfs_log_debug("Loading $UpCase...\n");
|
|
ni = ntfs_inode_open(vol, FILE_UpCase);
|
|
if (!ni) {
|
|
ntfs_log_perror("Failed to open inode FILE_UpCase");
|
|
goto error_exit;
|
|
}
|
|
/* Get an ntfs attribute for $UpCase/$DATA. */
|
|
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
|
|
if (!na) {
|
|
ntfs_log_perror("Failed to open ntfs attribute");
|
|
goto error_exit;
|
|
}
|
|
/*
|
|
* Note: Normally, the upcase table has a length equal to 65536
|
|
* 2-byte Unicode characters but allow for different cases, so no
|
|
* checks done. Just check we don't overflow 32-bits worth of Unicode
|
|
* characters.
|
|
*/
|
|
if (na->data_size & ~0x1ffffffffULL) {
|
|
ntfs_log_error("Error: Upcase table is too big (max 32-bit "
|
|
"allowed).\n");
|
|
errno = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
if (vol->upcase_len != na->data_size >> 1) {
|
|
vol->upcase_len = na->data_size >> 1;
|
|
/* Throw away default table. */
|
|
free(vol->upcase);
|
|
vol->upcase = ntfs_malloc(na->data_size);
|
|
if (!vol->upcase)
|
|
goto error_exit;
|
|
}
|
|
/* Read in the $DATA attribute value into the buffer. */
|
|
l = ntfs_attr_pread(na, 0, na->data_size, vol->upcase);
|
|
if (l != na->data_size) {
|
|
ntfs_log_error("Failed to read $UpCase, unexpected length "
|
|
"(%lld != %lld).\n", (long long)l,
|
|
(long long)na->data_size);
|
|
errno = EIO;
|
|
goto error_exit;
|
|
}
|
|
/* Done with the $UpCase mft record. */
|
|
ntfs_attr_close(na);
|
|
if (ntfs_inode_close(ni)) {
|
|
ntfs_log_perror("Failed to close $UpCase");
|
|
goto error_exit;
|
|
}
|
|
|
|
/*
|
|
* Now load $Volume and set the version information and flags in the
|
|
* vol structure accordingly.
|
|
*/
|
|
ntfs_log_debug("Loading $Volume...\n");
|
|
vol->vol_ni = ntfs_inode_open(vol, FILE_Volume);
|
|
if (!vol->vol_ni) {
|
|
ntfs_log_perror("Failed to open inode FILE_Volume");
|
|
goto error_exit;
|
|
}
|
|
/* Get a search context for the $Volume/$VOLUME_INFORMATION lookup. */
|
|
ctx = ntfs_attr_get_search_ctx(vol->vol_ni, NULL);
|
|
if (!ctx)
|
|
goto error_exit;
|
|
|
|
/* Find the $VOLUME_INFORMATION attribute. */
|
|
if (ntfs_attr_lookup(AT_VOLUME_INFORMATION, AT_UNNAMED, 0, 0, 0, NULL,
|
|
0, ctx)) {
|
|
ntfs_log_perror("$VOLUME_INFORMATION attribute not found in "
|
|
"$Volume");
|
|
goto error_exit;
|
|
}
|
|
a = ctx->attr;
|
|
/* Has to be resident. */
|
|
if (a->non_resident) {
|
|
ntfs_log_error("Attribute $VOLUME_INFORMATION must be "
|
|
"resident but it isn't.\n");
|
|
errno = EIO;
|
|
goto error_exit;
|
|
}
|
|
/* Get a pointer to the value of the attribute. */
|
|
vinf = (VOLUME_INFORMATION*)(le16_to_cpu(a->value_offset) + (char*)a);
|
|
/* Sanity checks. */
|
|
if ((char*)vinf + le32_to_cpu(a->value_length) > (char*)ctx->mrec +
|
|
le32_to_cpu(ctx->mrec->bytes_in_use) ||
|
|
le16_to_cpu(a->value_offset) + le32_to_cpu(
|
|
a->value_length) > le32_to_cpu(a->length)) {
|
|
ntfs_log_error("$VOLUME_INFORMATION in $Volume is corrupt.\n");
|
|
errno = EIO;
|
|
goto error_exit;
|
|
}
|
|
/* Setup vol from the volume information attribute value. */
|
|
vol->major_ver = vinf->major_ver;
|
|
vol->minor_ver = vinf->minor_ver;
|
|
/* Do not use le16_to_cpu() macro here as our VOLUME_FLAGS are
|
|
defined using cpu_to_le16() macro and hence are consistent. */
|
|
vol->flags = vinf->flags;
|
|
/*
|
|
* Reinitialize the search context for the $Volume/$VOLUME_NAME lookup.
|
|
*/
|
|
ntfs_attr_reinit_search_ctx(ctx);
|
|
if (ntfs_attr_lookup(AT_VOLUME_NAME, AT_UNNAMED, 0, 0, 0, NULL, 0,
|
|
ctx)) {
|
|
if (errno != ENOENT) {
|
|
ntfs_log_perror("Failed to lookup of $VOLUME_NAME in "
|
|
"$Volume failed");
|
|
goto error_exit;
|
|
}
|
|
/*
|
|
* Attribute not present. This has been seen in the field.
|
|
* Treat this the same way as if the attribute was present but
|
|
* had zero length.
|
|
*/
|
|
vol->vol_name = ntfs_malloc(1);
|
|
if (!vol->vol_name)
|
|
goto error_exit;
|
|
vol->vol_name[0] = '\0';
|
|
} else {
|
|
a = ctx->attr;
|
|
/* Has to be resident. */
|
|
if (a->non_resident) {
|
|
ntfs_log_error("$VOLUME_NAME must be resident.\n");
|
|
errno = EIO;
|
|
goto error_exit;
|
|
}
|
|
/* Get a pointer to the value of the attribute. */
|
|
vname = (ntfschar*)(le16_to_cpu(a->value_offset) + (char*)a);
|
|
u = le32_to_cpu(a->value_length) / 2;
|
|
/*
|
|
* Convert Unicode volume name to current locale multibyte
|
|
* format.
|
|
*/
|
|
vol->vol_name = NULL;
|
|
if (ntfs_ucstombs(vname, u, &vol->vol_name, 0) == -1) {
|
|
ntfs_log_perror("Volume name could not be converted "
|
|
"to current locale");
|
|
ntfs_log_debug("Forcing name into ASCII by replacing "
|
|
"non-ASCII characters with underscores.\n");
|
|
vol->vol_name = ntfs_malloc(u + 1);
|
|
if (!vol->vol_name)
|
|
goto error_exit;
|
|
|
|
for (j = 0; j < (s32)u; j++) {
|
|
ntfschar uc = le16_to_cpu(vname[j]);
|
|
if (uc > 0xff)
|
|
uc = (ntfschar)'_';
|
|
vol->vol_name[j] = (char)uc;
|
|
}
|
|
vol->vol_name[u] = '\0';
|
|
}
|
|
}
|
|
ntfs_attr_put_search_ctx(ctx);
|
|
ctx = NULL;
|
|
/* Now load the attribute definitions from $AttrDef. */
|
|
ntfs_log_debug("Loading $AttrDef...\n");
|
|
ni = ntfs_inode_open(vol, FILE_AttrDef);
|
|
if (!ni) {
|
|
ntfs_log_perror("Failed to open $AttrDef");
|
|
goto error_exit;
|
|
}
|
|
/* Get an ntfs attribute for $AttrDef/$DATA. */
|
|
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
|
|
if (!na) {
|
|
ntfs_log_perror("Failed to open ntfs attribute");
|
|
goto error_exit;
|
|
}
|
|
/* Check we don't overflow 32-bits. */
|
|
if (na->data_size > 0xffffffffLL) {
|
|
ntfs_log_error("Attribute definition table is too big (max "
|
|
"32-bit allowed).\n");
|
|
errno = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
vol->attrdef_len = na->data_size;
|
|
vol->attrdef = ntfs_malloc(na->data_size);
|
|
if (!vol->attrdef)
|
|
goto error_exit;
|
|
/* Read in the $DATA attribute value into the buffer. */
|
|
l = ntfs_attr_pread(na, 0, na->data_size, vol->attrdef);
|
|
if (l != na->data_size) {
|
|
ntfs_log_error("Failed to read $AttrDef, unexpected length "
|
|
"(%lld != %lld).\n", (long long)l,
|
|
(long long)na->data_size);
|
|
errno = EIO;
|
|
goto error_exit;
|
|
}
|
|
/* Done with the $AttrDef mft record. */
|
|
ntfs_attr_close(na);
|
|
if (ntfs_inode_close(ni)) {
|
|
ntfs_log_perror("Failed to close $AttrDef");
|
|
goto error_exit;
|
|
}
|
|
/*
|
|
* Check for dirty logfile and hibernated Windows.
|
|
* We care only about read-write mounts.
|
|
*/
|
|
if (!(flags & MS_RDONLY)) {
|
|
if (!(flags & MS_IGNORE_HIBERFILE) &&
|
|
ntfs_volume_check_hiberfile(vol, 1) < 0)
|
|
goto error_exit;
|
|
if (ntfs_volume_check_logfile(vol) < 0) {
|
|
if (!(flags & MS_RECOVER))
|
|
goto error_exit;
|
|
ntfs_log_info("The file system wasn't safely "
|
|
"closed on Windows. Fixing.\n");
|
|
if (ntfs_logfile_reset(vol))
|
|
goto error_exit;
|
|
}
|
|
}
|
|
|
|
return vol;
|
|
io_error_exit:
|
|
errno = EIO;
|
|
error_exit:
|
|
eo = errno;
|
|
if (ctx)
|
|
ntfs_attr_put_search_ctx(ctx);
|
|
free(m);
|
|
free(m2);
|
|
__ntfs_volume_release(vol);
|
|
errno = eo;
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* ntfs_mount - open ntfs volume
|
|
* @name: name of device/file to open
|
|
* @flags: optional mount flags
|
|
*
|
|
* This function mounts an ntfs volume. @name should contain the name of the
|
|
* device/file to mount as the ntfs volume.
|
|
*
|
|
* @flags is an optional second parameter. The same flags are used as for
|
|
* the mount system call (man 2 mount). Currently only the following flags
|
|
* is implemented:
|
|
* MS_RDONLY - mount volume read-only
|
|
*
|
|
* The function opens the device or file @name and verifies that it contains a
|
|
* valid bootsector. Then, it allocates an ntfs_volume structure and initializes
|
|
* some of the values inside the structure from the information stored in the
|
|
* bootsector. It proceeds to load the necessary system files and completes
|
|
* setting up the structure.
|
|
*
|
|
* Return the allocated volume structure on success and NULL on error with
|
|
* errno set to the error code.
|
|
*
|
|
* Note, that a copy is made of @name, and hence it can be discarded as
|
|
* soon as the function returns.
|
|
*/
|
|
ntfs_volume *ntfs_mount(const char *name __attribute__((unused)),
|
|
unsigned long flags __attribute__((unused)))
|
|
{
|
|
#ifndef NO_NTFS_DEVICE_DEFAULT_IO_OPS
|
|
struct ntfs_device *dev;
|
|
ntfs_volume *vol;
|
|
|
|
/* Allocate an ntfs_device structure. */
|
|
dev = ntfs_device_alloc(name, 0, &ntfs_device_default_io_ops, NULL);
|
|
if (!dev)
|
|
return NULL;
|
|
/* Call ntfs_device_mount() to do the actual mount. */
|
|
vol = ntfs_device_mount(dev, flags);
|
|
if (!vol) {
|
|
int eo = errno;
|
|
ntfs_device_free(dev);
|
|
errno = eo;
|
|
} else
|
|
ntfs_create_lru_caches(vol);
|
|
return vol;
|
|
#else
|
|
/*
|
|
* ntfs_mount() makes no sense if NO_NTFS_DEVICE_DEFAULT_IO_OPS is
|
|
* defined as there are no device operations available in libntfs in
|
|
* this case.
|
|
*/
|
|
errno = EOPNOTSUPP;
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* ntfs_umount - close ntfs volume
|
|
* @vol: address of ntfs_volume structure of volume to close
|
|
* @force: if true force close the volume even if it is busy
|
|
*
|
|
* Deallocate all structures (including @vol itself) associated with the ntfs
|
|
* volume @vol.
|
|
*
|
|
* Return 0 on success. On error return -1 with errno set appropriately
|
|
* (most likely to one of EAGAIN, EBUSY or EINVAL). The EAGAIN error means that
|
|
* an operation is in progress and if you try the close later the operation
|
|
* might be completed and the close succeed.
|
|
*
|
|
* If @force is true (i.e. not zero) this function will close the volume even
|
|
* if this means that data might be lost.
|
|
*
|
|
* @vol must have previously been returned by a call to ntfs_mount().
|
|
*
|
|
* @vol itself is deallocated and should no longer be dereferenced after this
|
|
* function returns success. If it returns an error then nothing has been done
|
|
* so it is safe to continue using @vol.
|
|
*/
|
|
int ntfs_umount(ntfs_volume *vol, const BOOL force __attribute__((unused)))
|
|
{
|
|
struct ntfs_device *dev;
|
|
int ret;
|
|
|
|
if (!vol) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
dev = vol->dev;
|
|
ret = __ntfs_volume_release(vol);
|
|
ntfs_device_free(dev);
|
|
return ret;
|
|
}
|
|
|
|
#ifdef HAVE_MNTENT_H
|
|
|
|
#ifndef HAVE_REALPATH
|
|
/**
|
|
* realpath - If there is no realpath on the system
|
|
*/
|
|
static char *realpath(const char *path, char *resolved_path)
|
|
{
|
|
strncpy(resolved_path, path, PATH_MAX);
|
|
resolved_path[PATH_MAX] = '\0';
|
|
return resolved_path;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* ntfs_mntent_check - desc
|
|
*
|
|
* If you are wanting to use this, you actually wanted to use
|
|
* ntfs_check_if_mounted(), you just didn't realize. (-:
|
|
*
|
|
* See description of ntfs_check_if_mounted(), below.
|
|
*/
|
|
static int ntfs_mntent_check(const char *file, unsigned long *mnt_flags)
|
|
{
|
|
struct mntent *mnt;
|
|
char *real_file = NULL, *real_fsname = NULL;
|
|
FILE *f;
|
|
int err = 0;
|
|
|
|
real_file = ntfs_malloc(PATH_MAX + 1);
|
|
if (!real_file)
|
|
return -1;
|
|
real_fsname = ntfs_malloc(PATH_MAX + 1);
|
|
if (!real_fsname) {
|
|
err = errno;
|
|
goto exit;
|
|
}
|
|
if (!realpath(file, real_file)) {
|
|
err = errno;
|
|
goto exit;
|
|
}
|
|
if (!(f = setmntent(MOUNTED, "r"))) {
|
|
err = errno;
|
|
goto exit;
|
|
}
|
|
while ((mnt = getmntent(f))) {
|
|
if (!realpath(mnt->mnt_fsname, real_fsname))
|
|
continue;
|
|
if (!strcmp(real_file, real_fsname))
|
|
break;
|
|
}
|
|
endmntent(f);
|
|
if (!mnt)
|
|
goto exit;
|
|
*mnt_flags = NTFS_MF_MOUNTED;
|
|
if (!strcmp(mnt->mnt_dir, "/"))
|
|
*mnt_flags |= NTFS_MF_ISROOT;
|
|
#ifdef HAVE_HASMNTOPT
|
|
if (hasmntopt(mnt, "ro") && !hasmntopt(mnt, "rw"))
|
|
*mnt_flags |= NTFS_MF_READONLY;
|
|
#endif
|
|
exit:
|
|
free(real_file);
|
|
free(real_fsname);
|
|
if (err) {
|
|
errno = err;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* HAVE_MNTENT_H */
|
|
|
|
/**
|
|
* ntfs_check_if_mounted - check if an ntfs volume is currently mounted
|
|
* @file: device file to check
|
|
* @mnt_flags: pointer into which to return the ntfs mount flags (see volume.h)
|
|
*
|
|
* If the running system does not support the {set,get,end}mntent() calls,
|
|
* just return 0 and set *@mnt_flags to zero.
|
|
*
|
|
* When the system does support the calls, ntfs_check_if_mounted() first tries
|
|
* to find the device @file in /etc/mtab (or wherever this is kept on the
|
|
* running system). If it is not found, assume the device is not mounted and
|
|
* return 0 and set *@mnt_flags to zero.
|
|
*
|
|
* If the device @file is found, set the NTFS_MF_MOUNTED flags in *@mnt_flags.
|
|
*
|
|
* Further if @file is mounted as the file system root ("/"), set the flag
|
|
* NTFS_MF_ISROOT in *@mnt_flags.
|
|
*
|
|
* Finally, check if the file system is mounted read-only, and if so set the
|
|
* NTFS_MF_READONLY flag in *@mnt_flags.
|
|
*
|
|
* On success return 0 with *@mnt_flags set to the ntfs mount flags.
|
|
*
|
|
* On error return -1 with errno set to the error code.
|
|
*/
|
|
int ntfs_check_if_mounted(const char *file __attribute__((unused)),
|
|
unsigned long *mnt_flags)
|
|
{
|
|
*mnt_flags = 0;
|
|
#ifdef HAVE_MNTENT_H
|
|
return ntfs_mntent_check(file, mnt_flags);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* ntfs_version_is_supported - check if NTFS version is supported.
|
|
* @vol: ntfs volume whose version we're interested in.
|
|
*
|
|
* The function checks if the NTFS volume version is known or not.
|
|
* Version 1.1 and 1.2 are used by Windows NT3.x and NT4.
|
|
* Version 2.x is used by Windows 2000 Betas.
|
|
* Version 3.0 is used by Windows 2000.
|
|
* Version 3.1 is used by Windows XP, Windows Server 2003 and Longhorn.
|
|
*
|
|
* Return 0 if NTFS version is supported otherwise -1 with errno set.
|
|
*
|
|
* The following error codes are defined:
|
|
* EOPNOTSUPP - Unknown NTFS version
|
|
* EINVAL - Invalid argument
|
|
*/
|
|
int ntfs_version_is_supported(ntfs_volume *vol)
|
|
{
|
|
u8 major, minor;
|
|
|
|
if (!vol) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
major = vol->major_ver;
|
|
minor = vol->minor_ver;
|
|
|
|
if (NTFS_V1_1(major, minor) || NTFS_V1_2(major, minor))
|
|
return 0;
|
|
|
|
if (NTFS_V2_X(major, minor))
|
|
return 0;
|
|
|
|
if (NTFS_V3_0(major, minor) || NTFS_V3_1(major, minor))
|
|
return 0;
|
|
|
|
errno = EOPNOTSUPP;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* ntfs_logfile_reset - "empty" $LogFile data attribute value
|
|
* @vol: ntfs volume whose $LogFile we intend to reset.
|
|
*
|
|
* Fill the value of the $LogFile data attribute, i.e. the contents of
|
|
* the file, with 0xff's, thus marking the journal as empty.
|
|
*
|
|
* FIXME(?): We might need to zero the LSN field of every single mft
|
|
* record as well. (But, first try without doing that and see what
|
|
* happens, since chkdsk might pickup the pieces and do it for us...)
|
|
*
|
|
* On success return 0.
|
|
*
|
|
* On error return -1 with errno set to the error code.
|
|
*/
|
|
int ntfs_logfile_reset(ntfs_volume *vol)
|
|
{
|
|
ntfs_inode *ni;
|
|
ntfs_attr *na;
|
|
int eo;
|
|
|
|
if (!vol) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
ni = ntfs_inode_open(vol, FILE_LogFile);
|
|
if (!ni) {
|
|
ntfs_log_perror("Failed to open inode FILE_LogFile");
|
|
return -1;
|
|
}
|
|
|
|
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
|
|
if (!na) {
|
|
eo = errno;
|
|
ntfs_log_perror("Failed to open $FILE_LogFile/$DATA");
|
|
goto error_exit;
|
|
}
|
|
|
|
if (ntfs_empty_logfile(na)) {
|
|
eo = errno;
|
|
ntfs_attr_close(na);
|
|
goto error_exit;
|
|
}
|
|
|
|
ntfs_attr_close(na);
|
|
return ntfs_inode_close(ni);
|
|
|
|
error_exit:
|
|
ntfs_inode_close(ni);
|
|
errno = eo;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* ntfs_volume_write_flags - set the flags of an ntfs volume
|
|
* @vol: ntfs volume where we set the volume flags
|
|
* @flags: new flags
|
|
*
|
|
* Set the on-disk volume flags in the mft record of $Volume and
|
|
* on volume @vol to @flags.
|
|
*
|
|
* Return 0 if successful and -1 if not with errno set to the error code.
|
|
*/
|
|
int ntfs_volume_write_flags(ntfs_volume *vol, const u16 flags)
|
|
{
|
|
ATTR_RECORD *a;
|
|
VOLUME_INFORMATION *c;
|
|
ntfs_attr_search_ctx *ctx;
|
|
int ret = -1; /* failure */
|
|
|
|
if (!vol || !vol->vol_ni) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
/* Get a pointer to the volume information attribute. */
|
|
ctx = ntfs_attr_get_search_ctx(vol->vol_ni, NULL);
|
|
if (!ctx)
|
|
return -1;
|
|
|
|
if (ntfs_attr_lookup(AT_VOLUME_INFORMATION, AT_UNNAMED, 0, 0, 0, NULL,
|
|
0, ctx)) {
|
|
ntfs_log_error("Attribute $VOLUME_INFORMATION was not found "
|
|
"in $Volume!\n");
|
|
goto err_out;
|
|
}
|
|
a = ctx->attr;
|
|
/* Sanity check. */
|
|
if (a->non_resident) {
|
|
ntfs_log_error("Attribute $VOLUME_INFORMATION must be resident "
|
|
"but it isn't.\n");
|
|
errno = EIO;
|
|
goto err_out;
|
|
}
|
|
/* Get a pointer to the value of the attribute. */
|
|
c = (VOLUME_INFORMATION*)(le16_to_cpu(a->value_offset) + (char*)a);
|
|
/* Sanity checks. */
|
|
if ((char*)c + le32_to_cpu(a->value_length) > (char*)ctx->mrec +
|
|
le32_to_cpu(ctx->mrec->bytes_in_use) ||
|
|
le16_to_cpu(a->value_offset) +
|
|
le32_to_cpu(a->value_length) > le32_to_cpu(a->length)) {
|
|
ntfs_log_error("Attribute $VOLUME_INFORMATION in $Volume is "
|
|
"corrupt!\n");
|
|
errno = EIO;
|
|
goto err_out;
|
|
}
|
|
/* Set the volume flags. */
|
|
vol->flags = c->flags = flags & VOLUME_FLAGS_MASK;
|
|
/* Write them to disk. */
|
|
ntfs_inode_mark_dirty(vol->vol_ni);
|
|
if (ntfs_inode_sync(vol->vol_ni))
|
|
goto err_out;
|
|
|
|
ret = 0; /* success */
|
|
err_out:
|
|
ntfs_attr_put_search_ctx(ctx);
|
|
return ret;
|
|
}
|
|
|
|
int ntfs_volume_error(int err)
|
|
{
|
|
int ret;
|
|
|
|
switch (err) {
|
|
case 0:
|
|
ret = NTFS_VOLUME_OK;
|
|
break;
|
|
case EINVAL:
|
|
ret = NTFS_VOLUME_NOT_NTFS;
|
|
break;
|
|
case EIO:
|
|
ret = NTFS_VOLUME_CORRUPT;
|
|
break;
|
|
case EPERM:
|
|
ret = NTFS_VOLUME_HIBERNATED;
|
|
break;
|
|
case EOPNOTSUPP:
|
|
ret = NTFS_VOLUME_UNCLEAN_UNMOUNT;
|
|
break;
|
|
case EBUSY:
|
|
ret = NTFS_VOLUME_LOCKED;
|
|
break;
|
|
case ENXIO:
|
|
ret = NTFS_VOLUME_RAID;
|
|
break;
|
|
case EACCES:
|
|
ret = NTFS_VOLUME_NO_PRIVILEGE;
|
|
break;
|
|
default:
|
|
ret = NTFS_VOLUME_UNKNOWN_REASON;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
void ntfs_mount_error(const char *volume, const char *mntpoint, int err)
|
|
{
|
|
switch (err) {
|
|
case NTFS_VOLUME_NOT_NTFS:
|
|
ntfs_log_error(invalid_ntfs_msg, volume);
|
|
break;
|
|
case NTFS_VOLUME_CORRUPT:
|
|
ntfs_log_error("%s", corrupt_volume_msg);
|
|
break;
|
|
case NTFS_VOLUME_HIBERNATED:
|
|
ntfs_log_error(hibernated_volume_msg, volume, mntpoint);
|
|
break;
|
|
case NTFS_VOLUME_UNCLEAN_UNMOUNT:
|
|
ntfs_log_error("%s", unclean_journal_msg);
|
|
break;
|
|
case NTFS_VOLUME_LOCKED:
|
|
ntfs_log_error("%s", opened_volume_msg);
|
|
break;
|
|
case NTFS_VOLUME_RAID:
|
|
ntfs_log_error("%s", fakeraid_msg);
|
|
break;
|
|
case NTFS_VOLUME_NO_PRIVILEGE:
|
|
ntfs_log_error(access_denied_msg, volume);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int ntfs_set_locale(void)
|
|
{
|
|
const char *locale;
|
|
|
|
locale = setlocale(LC_ALL, "");
|
|
if (!locale) {
|
|
locale = setlocale(LC_ALL, NULL);
|
|
ntfs_log_error("Couldn't set local environment, using default "
|
|
"'%s'.\n", locale);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Feed the counts of free clusters and free mft records
|
|
*/
|
|
|
|
int ntfs_volume_get_free_space(ntfs_volume *vol)
|
|
{
|
|
ntfs_attr *na;
|
|
int ret;
|
|
|
|
ret = -1; /* default return */
|
|
vol->free_clusters = ntfs_attr_get_free_bits(vol->lcnbmp_na);
|
|
if (vol->free_clusters < 0) {
|
|
ntfs_log_perror("Failed to read NTFS $Bitmap");
|
|
} else {
|
|
na = vol->mftbmp_na;
|
|
vol->free_mft_records = ntfs_attr_get_free_bits(na);
|
|
|
|
if (vol->free_mft_records >= 0)
|
|
vol->free_mft_records += (na->allocated_size - na->data_size) << 3;
|
|
|
|
if (vol->free_mft_records < 0)
|
|
ntfs_log_perror("Failed to calculate free MFT records");
|
|
else
|
|
ret = 0;
|
|
}
|
|
return (ret);
|
|
}
|