From: "Chuck Lever" <chucklever@gmail.com>
Subject: Re: [RFC PATCH 1/3] NLM lock failover - lock release
Date: Thu, 29 Jun 2006 15:11:23 -0400
Message-ID: <76bd70e30606291211t338164adq985e43726da51e59@mail.gmail.com>
References: <44A417E7.5090500@redhat.com>
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Cc: cluster-devel@redhat.com, Lon Hohberger <lhh@redhat.com>,
	nfs@lists.sourceforge.net
To: "Wendy Cheng" <wcheng@redhat.com>
In-Reply-To: <44A417E7.5090500@redhat.com>
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On 6/29/06, Wendy Cheng <wcheng@redhat.com> wrote:
> The patch piggy-backs the logic into "rq_daddr" field of struct svc_rqst
> where NFS server ip address is stored. Upon writing IPv4 address in
> standard dot notation into /proc/fs/nfsd/nlm_unlock, the logic will
> examine NLM's global nlm_files list and subsequently unlock the
> associated file if server ip address matches.
>
> Due to the size of rq_daddr (u32), we would not be able to support IPV6
> for this round of changes. Another to-do item is to enable client:server
> ip pairs to allow NFS V4 failover.

FYI: I have a patch in my IPv6 patchset that increases the size of
this field specifically in order to hold an IPv6 address.  See:

   http://oss.oracle.com/~cel/linux-2.6/2.6.17/patches/52-svc-rq_daddr.diff

for the individual patch, and surrounding patches for more context.

-- 
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   -- Quarry worker's creed

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