linux-kernel - Re: vfs-scale, nd->inode after __do_follow

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Message-ID: <AANLkTi=pzFGHyFDYM_qvabODdKn8gDvRjjo_nbPfcT=q@mail.gmail.com>
Date:	Fri, 14 Jan 2011 19:40:01 +1100
From:	Nick Piggin <npiggin@...il.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	"J. R. Okajima" <hooanon05@...oo.co.jp>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: vfs-scale, nd->inode after __do_follow_link()

On Fri, Jan 14, 2011 at 4:28 PM, Al Viro <viro@...iv.linux.org.uk> wrote:
> On Fri, Jan 14, 2011 at 03:09:10PM +1100, Nick Piggin wrote:
>
>> > + ? ? ? ? ? ? ? ? ? ? ? struct dentry *i = path.dentry->d_inode;
>> > + ? ? ? ? ? ? ? ? ? ? ? if (!IS_ERR(cookie) && i->i_op->put_link)
>> > + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? i->i_op->put_link(path.dentry, &nd, cookie);
>> > ? ? ? ? ? ? ? ? ? ? ? ?/* nd.path had been dropped */
>> > ? ? ? ? ? ? ? ? ? ? ? ?nd.path = path;
>> > ? ? ? ? ? ? ? ? ? ? ? ?goto out_path;
>>
>> It should be the inode we followed, rather than the inode of the
>> new path, I think.
>
> And that's what the first argument of __do_follow_link() is.  I'm actually
> tempted to rename it from path to symlink and make it const to clarify
> the things a bit.

Yes I was completely wrong there, thanks again for another good
catch. I'll merge this in the vfs-scale branch, and ask to merge if
there are no objections.

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