NTFS: Use i_size_read() in fs/ntfs/logfile.c::ntfs_{check,empty}_logfile().
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 9c4e78a..b1a9494 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -2,20 +2,18 @@
- Find and fix bugs.
- Checkpoint or disable the user space journal ($UsnJrnl).
- In between ntfs_prepare/commit_write, need exclusion between
- simultaneous file extensions. Need perhaps an NInoResizeUnderway()
- flag which we can set in ntfs_prepare_write() and clear again in
- ntfs_commit_write(). Just have to be careful in readpage/writepage,
- as well as in truncate, that we play nice... We might need to have
- a data_size field in the ntfs_inode to store the real attribute
- length. Also need to be careful with initialized_size extention in
+ 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...
- OTOH, perhaps i_sem, which is held accross generic_file_write is
- sufficient for synchronisation here. We then just need to make sure
- ntfs_readpage/writepage/truncate interoperate properly with us.
- UPDATE: The above is all ok as it is due to i_sem held. The only
- thing that needs to be checked is ntfs_writepage() which does not
- hold i_sem. It cannot change i_size but it needs to cope with a
- concurrent i_size change.
+ 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.
- 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
@@ -32,6 +30,7 @@
attack. Thanks to Carl-Daniel Hailfinger from SuSE for pointing this
out.
- Use i_size_read() in fs/ntfs/attrib.c::ntfs_attr_set().
+ - Use i_size_read() in fs/ntfs/logfile.c::ntfs_{check,empty}_logfile().
2.1.22 - Many bug and race fixes and error handling improvements.