linux-kernel - Re: [PATCH -V18 04/13] vfs: Allow handle based open on symlinks

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Message-ID: <m3fwya8213.fsf@linux.vnet.ibm.com>
Date:	Fri, 20 Aug 2010 07:43:12 +0530
From:	"Aneesh Kumar K. V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	hch@...radead.org, viro@...iv.linux.org.uk, adilger@....com,
	corbet@....net, neilb@...e.de, npiggin@...e.de,
	hooanon05@...oo.co.jp, bfields@...ldses.org, miklos@...redi.hu
Cc:	linux-fsdevel@...r.kernel.org, sfrench@...ibm.com,
	philippe.deniel@....FR, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -V18 04/13] vfs: Allow handle based open on symlinks

On Fri, 20 Aug 2010 07:21:28 +0530, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> wrote:
> The patch update may_open to allow handle based open on symlinks.
> The file handle based API use file descritor returned from open_by_handle_at
> to do different file system operations. To find the link target name we
> need to get a file descriptor on symlinks.
> 
> We should be able to read the link target using file handle. The exact
> usecase is with respect to implementing READLINK operation on a
> userspace NFS server. The request contain the file handle and the
> response include target name.
> 

If we don't do this, we will need new syscalls for doing stat, readlink
and link on symlinks that take file handle as the argument. If that is ok,
I can redo the patch series accordingly.

-aneesh
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