linux-kernel - Re: [PATCH] target/file: fix inclusive vfs_fsync

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Message-ID: <20141007063945.GA4185@infradead.org>
Date:	Mon, 6 Oct 2014 23:39:45 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Zach Brown <zab@...bo.net>
Cc:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] target/file: fix inclusive vfs_fsync_range() end

On Mon, Oct 06, 2014 at 04:40:13PM -0700, Zach Brown wrote:
> Both of the file target's calls to vfs_fsync_range() got the end offset
> off by one.  The range is inclusive, not exclusive.  It would sync a bit
> more data than was required.
> 
> The sync path already tested the length of the range and fell back to
> LLONG_MAX so I copied that pattern in the rw path.
> 
> This is untested. I found the errors by inspection while following other
> code.

Maybe it's time to move vfs_fsync_range to a more normal calling
convention?
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