NTFS: - In fs/ntfs/compress.c, use i_size_read() at the start and then use the
cached value everywhere. Cache the initialized_size in the same way
and protect the critical region where the two sizes are read using the
new size_lock of the ntfs inode.
- Add the new size_lock to the ntfs_inode structure (fs/ntfs/inode.h)
and initialize it (fs/ntfs/inode.c).
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
index 9958045..56b2d6e 100644
--- a/fs/ntfs/inode.h
+++ b/fs/ntfs/inode.h
@@ -44,6 +44,7 @@
* fields already provided in the VFS inode.
*/
struct _ntfs_inode {
+ rwlock_t size_lock; /* Lock serializing access to inode sizes. */
s64 initialized_size; /* Copy from the attribute record. */
s64 allocated_size; /* Copy from the attribute record. */
unsigned long state; /* NTFS specific flags describing this inode.