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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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25
fs/ntfs/attrib.c
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@ -1695,7 +1695,9 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
a->data.non_resident.initialized_size =
cpu_to_sle64(attr_size);
if (NInoSparse(ni) || NInoCompressed(ni)) {
a->data.non_resident.compression_unit = 4;
a->data.non_resident.compression_unit = 0;
if (NInoCompressed(ni) || vol->major_ver < 3)
a->data.non_resident.compression_unit = 4;
a->data.non_resident.compressed_size =
a->data.non_resident.allocated_size;
} else
@ -1714,13 +1716,20 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
ni->allocated_size = new_size;
if (NInoSparse(ni) || NInoCompressed(ni)) {
ni->itype.compressed.size = ni->allocated_size;
ni->itype.compressed.block_size = 1U <<
(a->data.non_resident.compression_unit +
vol->cluster_size_bits);
ni->itype.compressed.block_size_bits =
ffs(ni->itype.compressed.block_size) - 1;
ni->itype.compressed.block_clusters = 1U <<
a->data.non_resident.compression_unit;
if (a->data.non_resident.compression_unit) {
ni->itype.compressed.block_size = 1U << (a->data.
non_resident.compression_unit +
vol->cluster_size_bits);
ni->itype.compressed.block_size_bits =
ffs(ni->itype.compressed.block_size) -
1;
ni->itype.compressed.block_clusters = 1U <<
a->data.non_resident.compression_unit;
} else {
ni->itype.compressed.block_size = 0;
ni->itype.compressed.block_size_bits = 0;
ni->itype.compressed.block_clusters = 0;
}
vi->i_blocks = ni->itype.compressed.size >> 9;
} else
vi->i_blocks = ni->allocated_size >> 9;