NTFS: Update attribute definition handling.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 8ff6ea7..52f868a 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -110,6 +110,7 @@
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.
diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index 1b95f392..23ca3bd 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -1138,28 +1138,21 @@
* 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_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;
}
/**
diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h
index 8d1f132..458cb54 100644
--- a/fs/ntfs/layout.h
+++ b/fs/ntfs/layout.h
@@ -547,26 +547,44 @@
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;
diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
index a0bf706..e85f6e9 100644
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -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 @@
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. */
