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NTFS: Correct sparse file handling. The compressed values need to be

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checked and set in the ntfs inode as done for compressed files
      and the compressed size needs to be used for vfs inode->i_blocks
      instead of the allocated size, again, as done for compressed files.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov
2005-03-03 14:43:43 +00:00
parent 413826868f
commit 9451f8519c
3 changed files with 94 additions and 97 deletions
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15
fs/ntfs/layout.h
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@@ -749,10 +749,11 @@ typedef struct {
record header aligned to 8-byte boundary. */
/* 34*/ u8 compression_unit; /* The compression unit expressed
as the log to the base 2 of the number of
clusters in a compression unit. 0 means not
compressed. (This effectively limits the
clusters in a compression unit. 0 means not
compressed. (This effectively limits the
compression unit size to be a power of two
clusters.) WinNT4 only uses a value of 4. */
clusters.) WinNT4 only uses a value of 4.
Sparse files also have this set to 4. */
/* 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.*/
@@ -772,10 +773,10 @@ typedef struct {
data_size. */
/* sizeof(uncompressed attr) = 64*/
/* 64*/ sle64 compressed_size; /* Byte size of the attribute
value after compression. Only present when
compressed. Always is a multiple of the
cluster size. Represents the actual amount of
disk space being used on the disk. */
value after compression. Only present when
compressed or sparse. Always is a multiple of
the cluster size. Represents the actual amount
of disk space being used on the disk. */
/* sizeof(compressed attr) = 72*/
} __attribute__ ((__packed__)) non_resident;
} __attribute__ ((__packed__)) data;