netdev - Re: [PATCH ipsec-next] xfrm: Use VRF master index if output device is enslaved

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Date:	Wed, 19 Aug 2015 15:47:18 +0300
From:	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:	David Ahern <dsa@...ulusnetworks.com>
Cc:	steffen.klassert@...unet.com, netdev@...r.kernel.org
Subject: Re: [PATCH ipsec-next] xfrm: Use VRF master index if output device is enslaved


> On Aug 18, 2015, at 6:54 PM, David Ahern <dsa@...ulusnetworks.com> wrote:
> 
> Directs route lookups to VRF table. Compiles out if NET_VRF is not
> enabled. With this patch able to successfully bring up ipsec tunnels
> in VRFs, even with duplicate network configuration (IPv4 tested).
> 
> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
> ---
> net/ipv4/xfrm4_policy.c | 7 +++++--
> net/ipv6/xfrm6_policy.c | 7 +++++--
> 2 files changed, 10 insertions(+), 4 deletions(-)

I think you should use the new vrf_master_index() helper that acquires rcu because
it looks possible to call ->decode_session() without rcu read lock, e.g. in the hold_timer
function xfrm_policy_queue_process(), though I haven’t tested it and might be missing
something. :-)

Cheers,
 Nik--
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