linux-kernel - Re: [PATCH -V13 0/11] Generic name to handle and open by handle syscalls

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Message-ID: <20100604054328.GA20641@dastard>
Date:	Fri, 4 Jun 2010 15:43:28 +1000
From:	Dave Chinner <david@...morbit.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	hch@...radead.org, viro@...iv.linux.org.uk, adilger@....com,
	corbet@....net, serue@...ibm.com, neilb@...e.de,
	hooanon05@...oo.co.jp, bfields@...ldses.org,
	linux-fsdevel@...r.kernel.org, sfrench@...ibm.com,
	philippe.deniel@....FR, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -V13 0/11] Generic name to handle and open by handle
 syscalls

On Thu, Jun 03, 2010 at 09:44:06PM +0530, Aneesh Kumar K.V wrote:
> Hi,
> 
> The below set of patches implement open by handle support using exportfs
> operations. This allows user space application to map a file name to file 
> handle and later open the file using handle. This should be usable
> for userspace NFS [1] and 9P server [2]. XFS already support this with the ioctls
> XFS_IOC_PATH_TO_HANDLE and XFS_IOC_OPEN_BY_HANDLE.
.....
> Example program: (x86_32). (x86_64 would need a different syscall number)

[snip test program]

Just a thought - can you write a set of tests using this (or
similar) test program and integrate them into xfstests?

That will help ensure correctness when implementing the API in other
filesystems (e.g. XFS ;), as well as provide some level of assurance
that we'll notice when we break the code...

Cheers,

Dave.

-- 
Dave Chinner
david@...morbit.com
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