Commit bb3cf335 authored by Anton Altaparmakov's avatar Anton Altaparmakov
Browse files

NTFS: Update attribute definition handling.


Signed-off-by: default avatarAnton Altaparmakov <aia21@cantab.net>
parent b0d2374d
......@@ -110,6 +110,7 @@ ToDo/Notes:
only emit a warning when the checksum is incorrect rather than
refusing the mount. Thanks to Bernd Casimir for pointing this
problem out.
- Update attribute definition handling.
2.1.22 - Many bug and race fixes and error handling improvements.
......
......@@ -1138,28 +1138,21 @@ int ntfs_attr_size_bounds_check(const ntfs_volume *vol, const ATTR_TYPE type,
* 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.
*
* Return 0 if the attribute is allowed to be non-resident, -EPERM if not, or
* Return 0 if the attribute is allowed to be non-resident, -EPERM if not, and
* -ENOENT if the attribute is not listed in $AttrDef.
*/
int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, const ATTR_TYPE type)
{
ATTR_DEF *ad;
/*
* $DATA and $EA are always allowed to be non-resident even if $AttrDef
* does not specify this in the flags of the $DATA attribute definition
* record.
*/
if (type == AT_DATA || type == AT_EA)
return 0;
/* Find the attribute definition record in $AttrDef. */
ad = ntfs_attr_find_in_attrdef(vol, type);
if (unlikely(!ad))
return -ENOENT;
/* Check the flags and return the result. */
if (ad->flags & CAN_BE_NON_RESIDENT)
return 0;
return -EPERM;
if (ad->flags & ATTR_DEF_RESIDENT)
return -EPERM;
return 0;
}
/**
......@@ -1182,9 +1175,9 @@ int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, const ATTR_TYPE type)
*/
int ntfs_attr_can_be_resident(const ntfs_volume *vol, const ATTR_TYPE type)
{
if (type != AT_INDEX_ALLOCATION && type != AT_EA)
return 0;
return -EPERM;
if (type == AT_INDEX_ALLOCATION || type == AT_EA)
return -EPERM;
return 0;
}
/**
......
......@@ -547,26 +547,44 @@ enum {
COLLATION_NTOFS_ULONG = const_cpu_to_le32(0x10),
COLLATION_NTOFS_SID = const_cpu_to_le32(0x11),
COLLATION_NTOFS_SECURITY_HASH = const_cpu_to_le32(0x12),
COLLATION_NTOFS_ULONGS = const_cpu_to_le32(0x13)
COLLATION_NTOFS_ULONGS = const_cpu_to_le32(0x13),
};
typedef le32 COLLATION_RULE;
/*
* The flags (32-bit) describing attribute properties in the attribute
* definition structure. FIXME: This information is from Regis's information
* and, according to him, it is not certain and probably incomplete.
* The INDEXABLE flag is fairly certainly correct as only the file name
* attribute has this flag set and this is the only attribute indexed in NT4.
* definition structure. FIXME: This information is based on Regis's
* information and, according to him, it is not certain and probably
* incomplete. The INDEXABLE flag is fairly certainly correct as only the file
* name attribute has this flag set and this is the only attribute indexed in
* NT4.
*/
enum {
INDEXABLE = const_cpu_to_le32(0x02), /* Attribute can be
indexed. */
NEED_TO_REGENERATE = const_cpu_to_le32(0x40), /* Need to regenerate
during regeneration
phase. */
CAN_BE_NON_RESIDENT = const_cpu_to_le32(0x80), /* Attribute can be
non-resident. */
ATTR_DEF_INDEXABLE = const_cpu_to_le32(0x02), /* Attribute can be
indexed. */
ATTR_DEF_MULTIPLE = const_cpu_to_le32(0x04), /* Attribute type
can be present multiple times in the
mft records of an inode. */
ATTR_DEF_NOT_ZERO = const_cpu_to_le32(0x08), /* Attribute value
must contain at least one non-zero
byte. */
ATTR_DEF_INDEXED_UNIQUE = const_cpu_to_le32(0x10), /* Attribute must be
indexed and the attribute value must be
unique for the attribute type in all of
the mft records of an inode. */
ATTR_DEF_NAMED_UNIQUE = const_cpu_to_le32(0x20), /* Attribute must be
named and the name must be unique for
the attribute type in all of the mft
records of an inode. */
ATTR_DEF_RESIDENT = const_cpu_to_le32(0x40), /* Attribute must be
resident. */
ATTR_DEF_ALWAYS_LOG = const_cpu_to_le32(0x80), /* Always log
modifications to this attribute,
regardless of whether it is resident or
non-resident. Without this, only log
modifications if the attribute is
resident. */
};
typedef le32 ATTR_DEF_FLAGS;
......
......@@ -2,7 +2,7 @@
* ntfs.h - Defines for NTFS Linux kernel driver. Part of the Linux-NTFS
* project.
*
* Copyright (c) 2001-2004 Anton Altaparmakov
* Copyright (c) 2001-2005 Anton Altaparmakov
* Copyright (C) 2002 Richard Russon
*
* This program/include file is free software; you can redistribute it and/or
......@@ -41,6 +41,7 @@ typedef enum {
NTFS_BLOCK_SIZE_BITS = 9,
NTFS_SB_MAGIC = 0x5346544e, /* 'NTFS' */
NTFS_MAX_NAME_LEN = 255,
NTFS_MAX_ATTR_NAME_LEN = 255,
} NTFS_CONSTANTS;
/* Global variables. */
......
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