NTFS: Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports

      uncompressed and unencrypted files.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

1 files changed, 10 insertions, 10 deletions

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 6c5bdfbb7bbf..70ad4be7a7fe 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -3,16 +3,14 @@ ToDo/Notes:
         - In between ntfs_prepare/commit_write, need exclusion between
           simultaneous file extensions.  This is given to us by holding i_sem
           on the inode.  The only places in the kernel when a file is resized
-          are prepare/commit write and truncate for both of which i_sem is
-          held.  Just have to be careful in readpage/writepage and all other
-          helpers not running under i_sem that we play nice...
-          Also need to be careful with initialized_size extention in
-          ntfs_prepare_write. Basically, just be _very_ careful in this code...
-          UPDATE: The only things that need to be checked are read/writepage
-          which do not hold i_sem.  Note writepage cannot change i_size but it
-          needs to cope with a concurrent i_size change, just like readpage.
-          Also both need to cope with concurrent changes to the other sizes,
-          i.e. initialized/allocated/compressed size, as well.
+          are prepare/commit write and ntfs_truncate() for both of which i_sem
+          is held.  Just have to be careful in read-/writepage and other helpers
+          not running under i_sem that we play nice...  Also need to be careful
+          with initialized_size extention in ntfs_prepare_write and writepage.
+          UPDATE: The only things that need to be checked are
+          prepare/commit_write as well as the compressed write and the other
+          attribute resize/write cases like index attributes, etc.  For now
+          none of these are implemented so are safe.
         - Implement mft.c::sync_mft_mirror_umount().  We currently will just
           leave the volume dirty on umount if the final iput(vol->mft_ino)
           causes a write of any mirrored mft records due to the mft mirror
@@ -50,6 +48,8 @@ ToDo/Notes:
         - Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
           extend the allocation of an attributes.  Optionally, the data size,
           but not the initialized size can be extended, too.
+        - Implement fs/ntfs/inode.[hc]::ntfs_truncate().  It only supports
+          uncompressed and unencrypted files.
 
 2.1.24 - Lots of bug fixes and support more clean journal states.