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Bug 2029944

Summary:	Restoring saved flows ovs-ofctl: [...] field igmp missing value
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	Salvatore Daniele <sdaniele>
Component:	openvswitch2.13	Assignee:	Open vSwitch development team <ovs-team>
Status:	CLOSED ERRATA	QA Contact:	Rick Alongi <ralongi>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	FDP 20.E	CC:	amorenoz, ctrautma, jhsiao, msantana, ralongi, sdaniele
Target Milestone:	---
Target Release:	FDB 18.04
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	openvswitch2.13-2.13.0-140.el8fdp	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1982743	Environment:
Last Closed:	2022-02-24 17:47:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1982743
Bug Blocks:	2029938, 2029940

Description Salvatore Daniele 2021-12-07 15:56:15 UTC

+++ This bug was initially created as a clone of Bug #1982743 +++

Description of problem:

When restarting ovs, if it contains a flow that matches igmp traffic, ovs-ctl fails to restore the flows (and in fact all flows on the bridge are lost).

Version-Release number of selected component (if applicable):

Tested with latest (and upstream) openvswitch2.15

How reproducible:
Always

Steps to Reproduce:
1. /usr/share/openvswitch/scripts/ovs-ctl start openvswitch
2. ovs-vsctl add-br br0
3. ovs-ofctl add-flow br0 "ip,nw_proto=2 actions=drop"
4. /usr/share/openvswitch/scripts/ovs-ctl restart openvswitch

Actual results:

 /usr/share/openvswitch/scripts/ovs-ctl restart
Saving flows                                               [  OK  ]
Exiting ovsdb-server (2041630)                             [  OK  ]
Starting ovsdb-server                                      [  OK  ]
system ID not configured, please use --system-id ... failed!
Configuring Open vSwitch system IDs                        [  OK  ]
Exiting ovs-vswitchd (2041671)                             [  OK  ]
Starting ovs-vswitchd                                      [  OK  ]
Restoring saved flows ovs-ofctl: /tmp/ovs-save.FmwE0BbwhG/br0.flows.dump:2: field igmp missing value

$ ovs-ofctl dump-flows br0
(Does not contain flows after offending flow)

Expected results:

Error should not be generated and flows should be restored

Additional info:

--- Additional comment from Red Hat Bugzilla on 2021-09-21 10:02:10 UTC ---

remove performed by PnT Account Manager <pnt-expunge>

Comment 3 Rick Alongi 2022-01-20 16:00:26 UTC

# Reproduced issue using openvswitch2.13-2.13.0-139.el8fdp:

[root@netqe9 ~]# uname -r
4.18.0-193.6.3.el8_2.x86_64

[root@netqe9 ~]# rpm -qa | grep openvswitch
openvswitch-selinux-extra-policy-1.0-28.el8fdp.noarch
openvswitch2.13-2.13.0-139.el8fdp.x86_64

[root@netqe9 ~]# /usr/share/openvswitch/scripts/ovs-ctl start
ovsdb-server is already running.
ovs-vswitchd is already running.
Enabling remote OVSDB managers                             [  OK  ]

[root@netqe9 ~]# ovs-vsctl add-br br0
[root@netqe9 ~]# ovs-ofctl del-flows br0
[root@netqe9 ~]# ovs-ofctl add-flow br0 "ip,nw_proto=2 actions=drop"
[root@netqe9 ~]# ovs-ofctl add-flow br0 in_port=1,idle_timeout=0,actions=output:1
[root@netqe9 ~]# ovs-ofctl add-flow br0 in_port=2,idle_timeout=0,actions=output:2
[root@netqe9 ~]# ovs-ofctl dump-flows br0
 cookie=0x0, duration=19.871s, table=0, n_packets=0, n_bytes=0, igmp actions=drop
 cookie=0x0, duration=12.277s, table=0, n_packets=0, n_bytes=0, in_port=1 actions=output:1
 cookie=0x0, duration=6.306s, table=0, n_packets=0, n_bytes=0, in_port=2 actions=output:2
 
[root@netqe9 ~]# /usr/share/openvswitch/scripts/ovs-ctl restart
Saving flows                                               [  OK  ]
Exiting ovsdb-server (21444)                               [  OK  ]
Starting ovsdb-server                                      [  OK  ]
system ID not configured, please use --system-id ... failed!
Configuring Open vSwitch system IDs                        [  OK  ]
Exiting ovs-vswitchd (21903)                               [  OK  ]
Starting ovs-vswitchd                                      [  OK  ]
Restoring saved flows ovs-ofctl: /tmp/ovs-save.fZSLMp2gAa/br0.flows.dump:1: field igmp missing value
                                                           [  OK  ]
Enabling remote OVSDB managers                             [  OK  ]

[root@netqe9 ~]# ovs-ofctl dump-flows br0
 cookie=0x0, duration=11.553s, table=0, n_packets=0, n_bytes=0, priority=0 actions=NORMAL
[root@netqe9 ~]# 


# Verified fix using openvswitch2.13-2.13.0-143.el8fdp:

[root@netqe9 ~]# rpm -qa | grep openvswitch
openvswitch2.13-2.13.0-143.el8fdp.x86_64
openvswitch-selinux-extra-policy-1.0-28.el8fdp.noarch

[root@netqe9 ~]# /usr/share/openvswitch/scripts/ovs-ctl start
ovsdb-server is already running.
ovs-vswitchd is already running.
Enabling remote OVSDB managers                             [  OK  ]

[root@netqe9 ~]# ovs-vsctl add-br br0
[root@netqe9 ~]# ovs-ofctl del-flows br0
[root@netqe9 ~]# ovs-ofctl add-flow br0 "ip,nw_proto=2 actions=drop"
[root@netqe9 ~]# ovs-ofctl add-flow br0 in_port=1,idle_timeout=0,actions=output:1
[root@netqe9 ~]# ovs-ofctl add-flow br0 in_port=2,idle_timeout=0,actions=output:2

[root@netqe9 ~]# ovs-ofctl dump-flows br0
 cookie=0x0, duration=17.741s, table=0, n_packets=0, n_bytes=0, igmp actions=drop
 cookie=0x0, duration=10.505s, table=0, n_packets=0, n_bytes=0, in_port=1 actions=output:1
 cookie=0x0, duration=4.951s, table=0, n_packets=0, n_bytes=0, in_port=2 actions=output:2
 
[root@netqe9 ~]# /usr/share/openvswitch/scripts/ovs-ctl restart
Saving flows                                               [  OK  ]
Exiting ovsdb-server (37467)                               [  OK  ]
Starting ovsdb-server                                      [  OK  ]
system ID not configured, please use --system-id ... failed!
Configuring Open vSwitch system IDs                        [  OK  ]
Exiting ovs-vswitchd (37559)                               [  OK  ]
Starting ovs-vswitchd                                      [  OK  ]
Restoring saved flows                                      [  OK  ]
Enabling remote OVSDB managers                             [  OK  ]

[root@netqe9 ~]# ovs-ofctl dump-flows br0
 cookie=0x0, duration=14.594s, table=0, n_packets=0, n_bytes=0, igmp actions=drop
 cookie=0x0, duration=14.594s, table=0, n_packets=0, n_bytes=0, in_port=1 actions=output:1
 cookie=0x0, duration=14.594s, table=0, n_packets=0, n_bytes=0, in_port=2 actions=output:2
[root@netqe9 ~]#

Comment 5 errata-xmlrpc 2022-02-24 17:47:58 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (openvswitch2.13 update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:0675