+genius-dev
From: [email protected]
[mailto:[email protected]] On Behalf Of Josh Hershberg
Sent: Sunday, August 07, 2016 10:07 PM
To: odl netvirt dev <[email protected]>;
[email protected]; Anil Vishnoi <[email protected]>
Subject: [netvirt-dev] openflow actions are out of order, break netvirt pipeline
All, it seems that for at least some flows the actions are being written out of
order.
Here is one flow from the netvirt pipeline [1], printed to the logs one line
before it is written to the md-sal. You can clearly see how the load to reg6
comes before the resubmit action. However, dump-flows gives the opposite order
[2]. Something down the stack from netvirt is flipping the order. This is
further confirmed from a tcpdump capture where you can see that in the
OFPT_FLOW_MOD the resubmit is sent before the reg load ([3] if anyone really
wants to break their head).
[1] 2016-08-07 18:12:10,909 | WARN | nPool-1-worker-0 | MDSALManager
| 314 - org.opendaylight.genius.mdsalutil-impl - 0.1.0.SNAPSHOT |
JOSH writing flow Flow [_cookie=F lowCookie [_value=142606337],
_flowName=6f5da2ff-7470-4489-a987-a867f5319a46, _hardTimeout=0, _id=Uri
[_value=551], _idleTimeout=0, _instructions=Instructions
[_instruction=[Instruction [_instruction=ApplyActionsCase
[_applyActions=ApplyActions [_action=[Action
[_action=NxActionRegLoadNodesNodeTableFlowApplyActionsCase
[_nxRegLoad=NxRegLoad [_dst=Dst [_dstChoice=DstNx RegCase [_nxReg=class
org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6,
augmentation=[]], _end=31, _start=0, augmentation=[]], _value=256, augment
ation=[]], augmentation=[]], _key=ActionKey [_order=0], _order=0,
augmentation=[]], Action [_action=NxActionResubmitRpcAddGroupCase
[_nxResubmit=NxResubmit [_table=220, augmentation=[]] , augmentation=[]],
_key=ActionKey [_order=1], _order=1, augmentation=[]]], augmentation=[]],
augmentation=[]], _key=InstructionKey [_order=0], _order=0, augmentation=[]]],
augmentation =[]], _key=FlowKey [_id=Uri [_value=551]], _match=Match
[_tunnel=Tunnel [_tunnelId=1, augmentation=[]], augmentation=[]], _priority=9,
_tableId=55, _barrier=false, _installHw=true, _str ict=true,
augmentation=[]]
[2] cookie=0x8800001, duration=112.109s, table=55, n_packets=30, n_bytes=1692,
priority=9,tun_id=0x1 actions=resubmit(,220),load:0x100->NXM_NX_REG6[]
[3]
ff ff 00 10 00 00 23 20
0010 00 0e ff f8 dc 00 00 00 ff ff 00 18 00 00 23 20
0020 00 07 00 1f 00 01 0c 04 00 00 00 00 00 00 01 00
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