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

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Message-ID: <4BB1ECBF.50000@iki.fi>
Date:	Tue, 30 Mar 2010 15:21:19 +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 03:04:01PM +0300, Timo Teräs wrote:
>>> I think it's hashed so socket policies are included in the policy
>> db dumps and counts.
> 
> No we use a linked list for that.

Ah, yes. It's just all done together in the __xfrm_link_policy().

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.
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