Re: [PATCH 0/4] net-next: dsa: fix flow dissection

From: John Crispin
Date: Thu Aug 10 2017 - 03:40:54 EST




On 10/08/17 08:42, Eric Dumazet wrote:
On Wed, 2017-08-09 at 22:52 -0700, David Miller wrote:
From: John Crispin <john@xxxxxxxxxxx>
Date: Wed, 9 Aug 2017 14:41:15 +0200

RPS and probably other kernel features are currently broken on some if not
all DSA devices. The root cause of this is that skb_hash will call the
flow_dissector. At this point the skb still contains the magic switch
header and the skb->protocol field is not set up to the correct 802.3
value yet. By the time the tag specific code is called, removing the header
and properly setting the protocol an invalid hash is already set. In the
case of the mt7530 this will result in all flows always having the same
hash.

Changes since RFC:
* use a callback instead of static values
* add cover letter
Series applied, thanks.
Is this related ?

net/core/flow_dissector.c: In function '__skb_flow_dissect':
net/core/flow_dissector.c:448:18: error: 'struct net_device' has no member named 'dsa_ptr'
ops = skb->dev->dsa_ptr->tag_ops;
^
make[3]: *** [net/core/flow_dissector.o] Error 1



looks like it, I did test the patches against net-next from 24 hours ago, let me do a test build just now.
John


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