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fix non-resident TXF_DATA creation, despite its AttrDef definition,

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which caused Vista and later not being able to access files, volumes
(Anton Altaparmakov, Erik Larsson, Jean-Pierre Andre, Szabolcs Szakacsits)
This commit is contained in:
szaka 2010-01-15 00:04:23 +00:00
parent c7252ba416
commit 51f768af3b
2 changed files with 52 additions and 17 deletions
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5
include/ntfs-3g/attrib.h
View File

@ -39,6 +39,9 @@ typedef struct _ntfs_attr_search_ctx ntfs_attr_search_ctx;
extern ntfschar AT_UNNAMED[];
extern ntfschar STREAM_SDS[];
/* The little endian Unicode string $TXF_DATA as a global constant. */
extern ntfschar TXF_DATA[10];
/**
* enum ntfs_lcn_special_values - special return values for ntfs_*_vcn_to_lcn()
*
@ -281,8 +284,6 @@ extern runlist_element *ntfs_attr_find_vcn(ntfs_attr *na, const VCN vcn);
extern int ntfs_attr_size_bounds_check(const ntfs_volume *vol,
const ATTR_TYPES type, const s64 size);
extern int ntfs_attr_can_be_non_resident(const ntfs_volume *vol,
const ATTR_TYPES type);
extern int ntfs_attr_can_be_resident(const ntfs_volume *vol,
const ATTR_TYPES type);
int ntfs_attr_make_non_resident(ntfs_attr *na,

64
libntfs-3g/attrib.c
View File

@ -1,11 +1,12 @@
/**
* attrib.c - Attribute handling code. Originated from the Linux-NTFS project.
*
* Copyright (c) 2000-2005 Anton Altaparmakov
* Copyright (c) 2000-2010 Anton Altaparmakov
* Copyright (c) 2002-2005 Richard Russon
* Copyright (c) 2002-2008 Szabolcs Szakacsits
* Copyright (c) 2004-2007 Yura Pakhuchiy
* Copyright (c) 2007-2009 Jean-Pierre Andre
* Copyright (c) 2007-2010 Jean-Pierre Andre
* Copyright (c) 2010 Erik Larsson
*
* 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
@ -69,6 +70,17 @@ ntfschar STREAM_SDS[] = { const_cpu_to_le16('$'),
const_cpu_to_le16('S'),
const_cpu_to_le16('\0') };
ntfschar TXF_DATA[] = { const_cpu_to_le16('$'),
const_cpu_to_le16('T'),
const_cpu_to_le16('X'),
const_cpu_to_le16('F'),
const_cpu_to_le16('_'),
const_cpu_to_le16('D'),
const_cpu_to_le16('A'),
const_cpu_to_le16('T'),
const_cpu_to_le16('A'),
const_cpu_to_le16('\0') };
static int NAttrFlag(ntfs_attr *na, FILE_ATTR_FLAGS flag)
{
if (na->type == AT_DATA && na->name == AT_UNNAMED)
@ -3008,10 +3020,14 @@ int ntfs_attr_size_bounds_check(const ntfs_volume *vol, const ATTR_TYPES type,
/**
* ntfs_attr_can_be_non_resident - check if an attribute can be non-resident
* @vol: ntfs volume to which the attribute belongs
* @type: attribute type which to check
* @type: attribute type to check
* @name: attribute name to check
* @name_len: attribute name length
*
* Check whether the attribute of @type on the ntfs volume @vol is allowed to
* be non-resident. This information is obtained from $AttrDef system file.
* Check whether the attribute of @type and @name with name length @name_len on
* the ntfs volume @vol is allowed to be non-resident. This information is
* obtained from $AttrDef system file and is augmented by rules imposed by
* Microsoft (e.g. see http://support.microsoft.com/kb/974729/).
*
* Return 0 if the attribute is allowed to be non-resident and -1 if not or an
* error occurred. On error the error code is stored in errno. The following
@ -3020,16 +3036,34 @@ int ntfs_attr_size_bounds_check(const ntfs_volume *vol, const ATTR_TYPES type,
* ENOENT - The attribute @type is not specified in $AttrDef.
* EINVAL - Invalid parameters (e.g. @vol is not valid).
*/
int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, const ATTR_TYPES type)
static int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, const ATTR_TYPES type,
const ntfschar *name, int name_len)
{
ATTR_DEF *ad;
BOOL allowed;
/* Find the attribute definition record in $AttrDef. */
ad = ntfs_attr_find_in_attrdef(vol, type);
if (!ad)
return -1;
/* Check the flags and return the result. */
if (ad->flags & ATTR_DEF_RESIDENT) {
/*
* Microsoft has decreed that $LOGGED_UTILITY_STREAM attributes with a
* name of $TXF_DATA must be resident despite the entry for
* $LOGGED_UTILITY_STREAM in $AttrDef allowing them to be non-resident.
* Failure to obey this on the root directory mft record of a volume
* causes Windows Vista and later to see the volume as a RAW volume and
* thus cannot mount it at all.
*/
if ((type == AT_LOGGED_UTILITY_STREAM)
&& name
&& ntfs_names_are_equal(TXF_DATA, 9, name, name_len,
CASE_SENSITIVE, vol->upcase, vol->upcase_len))
allowed = FALSE;
else {
/* Find the attribute definition record in $AttrDef. */
ad = ntfs_attr_find_in_attrdef(vol, type);
if (!ad)
return -1;
/* Check the flags and return the result. */
allowed = !(ad->flags & ATTR_DEF_RESIDENT);
}
if (!allowed) {
errno = EPERM;
ntfs_log_trace("Attribute can't be non-resident\n");
return -1;
@ -3294,7 +3328,7 @@ int ntfs_non_resident_attr_record_add(ntfs_inode *ni, ATTR_TYPES type,
return -1;
}
if (ntfs_attr_can_be_non_resident(ni->vol, type)) {
if (ntfs_attr_can_be_non_resident(ni->vol, type, name, name_len)) {
if (errno == EPERM)
ntfs_log_perror("Attribute can't be non resident");
else
@ -3589,7 +3623,7 @@ int ntfs_attr_add(ntfs_inode *ni, ATTR_TYPES type,
}
/* Sanity checks for always resident attributes. */
if (ntfs_attr_can_be_non_resident(ni->vol, type)) {
if (ntfs_attr_can_be_non_resident(ni->vol, type, name, name_len)) {
if (errno != EPERM) {
err = errno;
ntfs_log_perror("ntfs_attr_can_be_non_resident failed");
@ -4154,7 +4188,7 @@ int ntfs_attr_make_non_resident(ntfs_attr *na,
}
/* Check that the attribute is allowed to be non-resident. */
if (ntfs_attr_can_be_non_resident(vol, na->type))
if (ntfs_attr_can_be_non_resident(vol, na->type, na->name, na->name_len))
return -1;
new_allocated_size = (le32_to_cpu(a->value_length) + vol->cluster_size