NTFS: Add support for sparse files which have a compression unit of 0.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 55263b7..ae34192 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -1,7 +1,7 @@
/**
* inode.c - NTFS kernel inode handling. Part of the Linux-NTFS project.
*
- * Copyright (c) 2001-2005 Anton Altaparmakov
+ * Copyright (c) 2001-2006 Anton Altaparmakov
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
@@ -24,8 +24,10 @@
#include <linux/smp_lock.h>
#include <linux/quotaops.h>
#include <linux/mount.h>
+#include <linux/mutex.h>
#include "aops.h"
+#include "attrib.h"
#include "dir.h"
#include "debug.h"
#include "inode.h"
@@ -1064,10 +1066,10 @@
if (a->non_resident) {
NInoSetNonResident(ni);
if (NInoCompressed(ni) || NInoSparse(ni)) {
- if (a->data.non_resident.compression_unit !=
- 4) {
+ if (NInoCompressed(ni) && a->data.non_resident.
+ compression_unit != 4) {
ntfs_error(vi->i_sb, "Found "
- "nonstandard "
+ "non-standard "
"compression unit (%u "
"instead of 4). "
"Cannot handle this.",
@@ -1076,16 +1078,26 @@
err = -EOPNOTSUPP;
goto unm_err_out;
}
- ni->itype.compressed.block_clusters = 1U <<
- 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;
+ 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;
+ }
ni->itype.compressed.size = sle64_to_cpu(
a->data.non_resident.
compressed_size);
@@ -1338,8 +1350,9 @@
goto unm_err_out;
}
if (NInoCompressed(ni) || NInoSparse(ni)) {
- if (a->data.non_resident.compression_unit != 4) {
- ntfs_error(vi->i_sb, "Found nonstandard "
+ if (NInoCompressed(ni) && a->data.non_resident.
+ compression_unit != 4) {
+ ntfs_error(vi->i_sb, "Found non-standard "
"compression unit (%u instead "
"of 4). Cannot handle this.",
a->data.non_resident.
@@ -1347,13 +1360,22 @@
err = -EOPNOTSUPP;
goto unm_err_out;
}
- ni->itype.compressed.block_clusters = 1U <<
- 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;
+ 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;
+ }
ni->itype.compressed.size = sle64_to_cpu(
a->data.non_resident.compressed_size);
}