linux-kernel - Re: Oops in NFSv4 server in 2.6.23.17

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Message-ID: <58229.192.168.1.70.1205980267.squirrel@neil.brown.name>
Date:	Thu, 20 Mar 2008 13:31:07 +1100 (EST)
From:	"NeilBrown" <neilb@...e.de>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	"Lukas Hejtmanek" <xhejtman@....muni.cz>, nfsv4@...ux-nfs.org,
	linux-kernel@...r.kernel.org
Subject: Re: Oops in NFSv4 server in 2.6.23.17

On Thu, March 20, 2008 9:32 am, J. Bruce Fields wrote:
> On Mon, Mar 17, 2008 at 10:19:20AM +1100, Neil Brown wrote:
>> On Friday March 14, bfields@...ldses.org wrote:
>> > On Fri, Mar 14, 2008 at 04:05:10PM -0400, bfields wrote:
>> > > I find that a little contorted.  So I'll go ahead and submit this
>> small
>> > > patch to 2.6.25 and stable now (I have since managed to reproduce
>> what I
>> > > believe is your bug, though my symptoms were a little different),
>> and
>> > > then submit to 2.6.26 some cleanup which makes this more
>> understandable,
>> >
>> > Here's an attempt.  We could break up fh_verify even more, though.--b.
>>
>> Looks like a good attempt.
>>
>> My only suggestion would be to put a comment at the top of
>> nfsd_set_fh_dentry explaining what it does and who calls it.
>
> OK!  I'm planning to just add:
>
> +/*
> + * Use the given filehandle to look up the corresponding export and
> + * dentry.  On success, the results are used to set fh_export and
> + * fh_dentry.
> + */
>  static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh
> *fhp)
>  {
>  	struct knfsd_fh	*fh = &fhp->fh_handle;
>
> (Nothing about "who calls it", but it's static and its only caller is
> fh_verify, so that seemed uninteresting.)  Anything else you were
> looking for?

No, that's adequate.
The function name has one verb and 2 (or 3) nouns,  and it isn't clear
how the verb relates to the nouns.  The comment you gave makes that
clear.

Thanks,
NeilBrown

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