linux-kernel - Re: [PATCH 18/16] implement posix O_SYNC and O

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Date:	Thu, 10 Sep 2009 16:38:40 -0400
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Christoph Hellwig <hch@....de>
Cc:	Jan Kara <jack@...e.cz>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, akpm@...ux-foundation.org,
	drepper@...hat.com, viro@...iv.linux.org.uk, kyle@...artin.ca
Subject: Re: [PATCH 18/16] implement posix O_SYNC and O_DSYNC semantics

On Thu, 2009-09-10 at 22:25 +0200, Christoph Hellwig wrote:
> Index: linux-2.6/fs/sync.c
> ===================================================================
> --- linux-2.6.orig/fs/sync.c	2009-09-10 16:30:32.414027738 -0300
> +++ linux-2.6/fs/sync.c	2009-09-10 16:31:19.042005715 -0300
> @@ -285,10 +285,11 @@ SYSCALL_DEFINE1(fdatasync, unsigned int,
>   */
>  int generic_write_sync(struct file *file, loff_t pos, loff_t count)
>  {
> -	if (!(file->f_flags & O_SYNC) && !IS_SYNC(file->f_mapping->host))
> +	if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
>  		return 0;
>  	return vfs_fsync_range(file, file->f_path.dentry, pos,
> -			       pos + count - 1, 1);
> +			       pos + count - 1,
> +			       (file->f_flags & O_SYNC) ? 1 : 0);
>  }
>  EXPORT_SYMBOL(generic_write_sync);
>  
Shouldn't this be testing for

   file->f_flags & __O_SYNC

?

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