netdev - Re: How to find I/F to destination

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Message-ID: <20070504132008.GB2291@2ka.mipt.ru>
Date:	Fri, 4 May 2007 17:20:09 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	David Howells <dhowells@...hat.com>
Cc:	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>
Subject: Re: How to find I/F to destination

On Fri, May 04, 2007 at 02:08:15PM +0100, David Howells (dhowells@...hat.com) wrote:
> 
> Should route_get_raw() release the rtable if gets back?

You can also cache returned entry and then just clone it and check
->obsolete() callback.

Something like this:
struct dst_entry *route_get(struct dst_entry *dst)
{
	if (dst && dst->obsolete && dst->ops->check(dst, 0) == NULL) {
		dst_release(dst);
		return NULL;
	}
	return dst_clone(dst);
}

Copied from route code too.

> David

-- 
	Evgeniy Polyakov
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