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authorAnton Altaparmakov <aia21@cantab.net>2006-03-23 15:53:03 +0000
committerAnton Altaparmakov <aia21@cantab.net>2006-03-23 15:53:03 +0000
commita0646a1f04f1ec4c7514e5b00496b54e054a2c99 (patch)
tree2cdf9023dd85b968a1cd3e4150019e1bbac19f1a /fs/ntfs/attrib.c
parent949763b2b8822c6dc6da0d0e1d4af092152546c2 (diff)
NTFS: Add support for sparse files which have a compression unit of 0.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Diffstat (limited to 'fs/ntfs/attrib.c')
-rw-r--r--fs/ntfs/attrib.c25
1 files changed, 17 insertions, 8 deletions
diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index a92b9e9db91..7a568eb7d80 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -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;