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ext4: Remove syncing logic from ext4_file_write 

The syncing is now properly handled by generic_file_aio_write() so
no special ext4 code is needed.

CC: linux-ext4@vger.kernel.org
CC: tytso@mit.edu
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2009-08-18 17:48:27 +02:00
parent e367626b61
commit 0d34ec62e1
1 changed files with 2 additions and 51 deletions
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53
fs/ext4/file.c
View File

@ -58,10 +58,7 @@ static ssize_t
ext4_file_write(struct kiocb *iocb, const struct iovec *iov, ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos) unsigned long nr_segs, loff_t pos)
{ {
struct file *file = iocb->ki_filp; struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
struct inode *inode = file->f_path.dentry->d_inode;
ssize_t ret;
int err;
/* /*
* If we have encountered a bitmap-format file, the size limit * If we have encountered a bitmap-format file, the size limit
@ -81,53 +78,7 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
} }
} }
ret = generic_file_aio_write(iocb, iov, nr_segs, pos); return generic_file_aio_write(iocb, iov, nr_segs, pos);
/*
* Skip flushing if there was an error, or if nothing was written.
*/
if (ret <= 0)
return ret;
/*
* If the inode is IS_SYNC, or is O_SYNC and we are doing data
* journalling then we need to make sure that we force the transaction
* to disk to keep all metadata uptodate synchronously.
*/
if (file->f_flags & O_SYNC) {
/*
* If we are non-data-journaled, then the dirty data has
* already been flushed to backing store by generic_osync_inode,
* and the inode has been flushed too if there have been any
* modifications other than mere timestamp updates.
*
* Open question --- do we care about flushing timestamps too
* if the inode is IS_SYNC?
*/
if (!ext4_should_journal_data(inode))
return ret;
goto force_commit;
}
/*
* So we know that there has been no forced data flush. If the inode
* is marked IS_SYNC, we need to force one ourselves.
*/
if (!IS_SYNC(inode))
return ret;
/*
* Open question #2 --- should we force data to disk here too? If we
* don't, the only impact is that data=writeback filesystems won't
* flush data to disk automatically on IS_SYNC, only metadata (but
* historically, that is what ext2 has done.)
*/
force_commit:
err = ext4_force_commit(inode->i_sb);
if (err)
return err;
return ret;
} }
static struct vm_operations_struct ext4_file_vm_ops = { static struct vm_operations_struct ext4_file_vm_ops = {