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NTFS: Add support for sparse files which have a compression unit of 0.

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Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov 2006-03-23 15:53:03 +00:00
parent 949763b2b8
commit a0646a1f04
4 changed files with 75 additions and 38 deletions
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19
fs/ntfs/layout.h
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@ -769,7 +769,7 @@ typedef struct {
compressed. (This effectively limits the
compression unit size to be a power of two
clusters.) WinNT4 only uses a value of 4.
Sparse files also have this set to 4. */
Sparse files have this set to 0 on XPSP2. */
/* 35*/ u8 reserved[5]; /* Align to 8-byte boundary. */
/* The sizes below are only used when lowest_vcn is zero, as otherwise it would
be difficult to keep them up-to-date.*/
@ -1076,16 +1076,21 @@ typedef struct {
/* 20*/ sle64 last_access_time; /* Time this mft record was last
accessed. */
/* 28*/ sle64 allocated_size; /* Byte size of on-disk allocated space
for the data attribute. So for
normal $DATA, this is the
for the unnamed data attribute. So
for normal $DATA, this is the
allocated_size from the unnamed
$DATA attribute and for compressed
and/or sparse $DATA, this is the
compressed_size from the unnamed
$DATA attribute. NOTE: This is a
multiple of the cluster size. */
/* 30*/ sle64 data_size; /* Byte size of actual data in data
attribute. */
$DATA attribute. For a directory or
other inode without an unnamed $DATA
attribute, this is always 0. NOTE:
This is a multiple of the cluster
size. */
/* 30*/ sle64 data_size; /* Byte size of actual data in unnamed
data attribute. For a directory or
other inode without an unnamed $DATA
attribute, this is always 0. */
/* 38*/ FILE_ATTR_FLAGS file_attributes; /* Flags describing the file. */
/* 3c*/ union {
/* 3c*/ struct {