Re: RFC: support srcaddr= option to bind to local IPs.

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On 09/07/2010 01:54 PM, Trond Myklebust wrote:
On Tue, 2010-09-07 at 13:41 -0700, Ben Greear wrote:
On 09/07/2010 10:56 AM, Trond Myklebust wrote:
On Fri, 2010-09-03 at 11:55 -0700, Ben Greear wrote:
This patch lets one bind the local side of NFS sockets to a particular
IP address.  This can be useful for users on multi-homed systems.

This patch must be on top of the previous patch to fix the IPv6 address
comparison or it will not work.

Comments and suggestions welcome...I'll incorporate those and post an
official signed-off patch after that.

Thanks,
Ben


The code in nfs_callback_authenticate is going to break NFSv4 callbacks.
Callbacks are sent to the -oclientaddr address, not srcaddr (btw, I
really dislike that new boolean argument to nfs_find_client(). If you
don't want to compare the source address, then have the caller pass a
NULL pointer).


Would this fix the callback issue you speak of?  The idea is to
use source and dest to match if it exists, but if we find one
where server address matches and srcaddr isn't specified,
then we will use that.

No. As I said, it needs to match the clientaddr argument, not the
srcaddr.

The problem is that you are now potentially introducing cases where the
server may have multiple combinations of clientaddr and srcaddr.

Ok, so what do you think about allowing a flag to bind() to clientaddr
instead of having the separate srcaddr option?

Thanks,
Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com

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