netdev - Re: [PATCH 1/7] xfrm: remove policy lock when accessing policy->walk.dead

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Date:	Tue, 30 Mar 2010 15:41:02 +0300
From:	Timo Teräs <timo.teras@....fi>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/7] xfrm: remove policy lock when accessing policy->walk.dead

Herbert Xu wrote:
> On Tue, Mar 30, 2010 at 03:21:19PM +0300, Timo Teräs wrote:
>> Hmm... is it possible to modify/delete per-socket policies from
>> userland via xfrm_user? That would be also another race why
>> we'd need to check the unlinking result.
> 
> How would the user be able to specify the socket?
> 
> The answer is no.

I thought it was possible since they can be dumped.

But yes, I now see that the policy direction check does not
allow the per-socket policies to be specified.

So it'd make more sense to nuke the hashes entirely for
per-socket policies?
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