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NTFS: Use i_size_read() in fs/ntfs/logfile.c::ntfs_{check,empty}_logfile().

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Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov 2004-11-11 12:34:00 +00:00
parent da28438cae
commit 66129f88c4
2 changed files with 15 additions and 15 deletions
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25
fs/ntfs/ChangeLog
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@ -2,20 +2,18 @@ ToDo/Notes:
- 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 @@ ToDo/Notes:
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.

5
fs/ntfs/logfile.c
View file

@ -443,7 +443,7 @@ BOOL ntfs_check_logfile(struct inode *log_vi)
/* An empty $LogFile must have been clean before it got emptied. */
if (NVolLogFileEmpty(vol))
goto is_empty;
size = log_vi->i_size;
size = i_size_read(log_vi);
/* Make sure the file doesn't exceed the maximum allowed size. */
if (size > MaxLogFileSize)
size = MaxLogFileSize;
@ -689,7 +689,8 @@ BOOL ntfs_empty_logfile(struct inode *log_vi)
if (!NVolLogFileEmpty(vol)) {
int err;
err = ntfs_attr_set(NTFS_I(log_vi), 0, log_vi->i_size, 0xff);
err = ntfs_attr_set(NTFS_I(log_vi), 0, i_size_read(log_vi),
0xff);
if (unlikely(err)) {
ntfs_error(vol->sb, "Failed to fill $LogFile with "
"0xff bytes (error code %i).", err);