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Type: Bug
Resolution: Unresolved
Priority: Undefined
Fix Version/s: None
Affects Version/s: None
Component/s: openvswitch3.1
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Blocked:
False
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Pool Team:

rhel-sst-network-fastdatapath
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Sub-System Group:

ssg_networking

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[Imported from FD-3040]

Description of problem:

Version-Release number of selected component (if applicable):
openvswitch3.1-3.1.0-35.el9fdp.x86_64
openvswitch3.1-3.1.0-33.el9fdp.x86_64

How reproducible: 100%

Steps to Reproduce:
1. create net/tap device

ovs-vsctl --no-wait set Open_vSwitch . other_config:vhost-iommu-support=true
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true

ovs-vsctl add-br ovsbr0 – set bridge ovsbr0 datapath_type=netdev
ovs-vsctl add-port ovsbr0 myeth1 – set Interface myeth1 type=dpdk options:dpdk-devargs="net_tap1,iface=myeth1"

ovs-vsctl: Error detected while setting up 'myeth1': could not add network device myeth1 to ofproto (Invalid argument). See ovs-vswitchd log for details.

2. disable selinux and change user to root then re-run same test

setenforce 0
getenforce
Permissive

cat /etc/sysconfig/openvswitch
1. 1. Configuration options for openvswitch
    #
Enable core files.
This option should be set to "yes" or "no". The default is "yes".
--force-corefiles=yes
#
Set "nice" priority at which to run ovsdb-server:
--ovsdb-server-priority=-10
#
Set "nice" priority at which to run ovsdb-vswitchd:
--ovs-vswitchd-priority=-10
#
Pass or not --mlockall option to ovs-vswitchd.
This option should be set to "yes" or "no". The default is "yes".
Enabling this option can avoid networking interruptions due to
system memory pressure in extraordinary situations, such as multiple
concurrent VM import operations.
--mlockall=yes
#
Use valgrind:
--ovs-vswitchd-wrapper=valgrind
--ovsdb-server-wrapper=valgrind
#
Specify additional options, for example to start with debug logs:
--ovs-vswitchd-options='-vconsole:dbg -vfile:dbg'
--ovsdb-server-options='-vconsole:dbg -vfile:dbg'
#
OPTIONS=""

Uncomment and set the OVS User/Group value
#OVS_USER_ID="openvswitch:hugetlbfs"
OVS_USER_ID="root:root"

systemctl restart openvswitch
ovs-vsctl del-port myeth1
ovs-vsctl add-port ovsbr0 myeth1 – set Interface myeth1 type=dpdk options:dpdk-devargs="net_tap1,iface=myeth1"
ovs-vsctl: Error detected while setting up 'myeth1': could not add network device myeth1 to ofproto (Invalid argument). See ovs-vswitchd log for details.
ovs-vsctl: The default log directory is "/var/log/openvswitch".

Expected results:
net tap device should be created as well

===================================
echaudro@redhat.com added a comment - 2024/04/02 11:30 AM - Restricted to Red Hat Employee
Hi mhou@redhat.com can you confirm if this is still an issue? Asking as this issue was never assigned and was never raised as not being worked on. For now, I've assigned it to mcoqueli@redhat.com to give this an initial look.

mhou@redhat.com added a comment - 2023/07/20 10:01 AM
Test on openvswitch2.17-2.17.0-94, and It can also work as well.

sh tap.sh
+ awk ' { system("ovs-vsctl --if-exist del-br "$3" &>/dev/null") }'
+ grep name
+ ovs-vsctl list bridge
+ sleep 1
+ systemctl stop openvswitch
+ sleep 1
+ rm -rf /etc/openvswitch/conf.db
+ sleep 1
+ rm -rf /var/lib/openvswitch/pki
+ sleep 1
+ systemctl restart openvswitch
+ ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
+ ovs-vsctl add-br ovsbr0 – set bridge ovsbr0 datapath_type=netdev
+ ovs-vsctl add-port ovsbr0 myeth1 – set Interface myeth1 type=dpdk options:dpdk-devargs=net_tap1,iface=myeth1
[root@hp-dl388g10-03 ovs_bond_function]# ovs-vsctl show
e2d39037-c1f5-4bc7-bf19-b3a57b5bf5e6
Bridge ovsbr0
datapath_type: netdev
Port myeth1
Interface myeth1
type: dpdk
options: {dpdk-devargs="net_tap1,iface=myeth1"}
Port ovsbr0
Interface ovsbr0
type: internal
ovs_version: "2.17.1"
[root@hp-dl388g10-03 ovs_bond_function]# sh tap.sh
+ ovs-vsctl list bridge
+ grep name
+ awk '{ system("ovs-vsctl --if-exist del-br "$3" &>/dev/null") }
'
+ sleep 1
+ systemctl stop openvswitch
+ sleep 1
+ rm -rf /etc/openvswitch/conf.db
+ sleep 1
+ rm -rf /var/lib/openvswitch/pki
+ sleep 1
+ systemctl restart openvswitch
+ ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
+ ovs-vsctl add-br ovsbr0 – set bridge ovsbr0 datapath_type=netdev
+ ovs-vsctl add-port ovsbr0 myeth1 – set Interface myeth1 type=dpdk options:dpdk-devargs=net_tap1,iface=myeth1

ovs-vsctl show
d6f3f113-3d41-4f8e-ad3c-5b81fd50ce1a
Bridge ovsbr0
datapath_type: netdev
Port myeth1
Interface myeth1
type: dpdk
options: {dpdk-devargs="net_tap1,iface=myeth1"}
Port ovsbr0
Interface ovsbr0
type: internal
ovs_version: "2.17.8"

mhou@redhat.com added a comment - 2023/07/20 9:36 AM
This issue still existed on openvswitch3.1-3.1.0-2. But can't be reproduced on openvswitch2.17-2.17.0-4.el9fdp.x86_64.rpm. Here is a simple reproduced.
cat tap.sh
#!/bin/bash
#ovs-vsctl --no-wait set Open_vSwitch . other_config:vhost-iommu-support=true
set -x
ovs-vsctl list bridge 2>/dev/null | grep name | awk ' { system("ovs-vsctl --if-exist del-br "$3" &>/dev/null") }'
sleep 1
systemctl stop openvswitch &>/dev/null
sleep 1
rm -rf /etc/openvswitch/*.db
sleep 1
rm -rf /var/lib/openvswitch/*
sleep 1
systemctl restart openvswitch
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true

ovs-vsctl add-br ovsbr0 – set bridge ovsbr0 datapath_type=netdev
ovs-vsctl add-port ovsbr0 myeth1 – set Interface myeth1 type=dpdk options:dpdk-devargs="net_tap1,iface=myeth1"
# sh tap.sh
+ awk '{ system("ovs-vsctl --if-exist del-br "$3" &>/dev/null") }
'
+ grep name
+ ovs-vsctl list bridge
+ sleep 1
+ systemctl stop openvswitch
+ sleep 1
+ rm -rf /etc/openvswitch/conf.db
+ sleep 1
+ rm -rf /var/lib/openvswitch/pki
+ sleep 1
+ systemctl restart openvswitch
+ ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
+ ovs-vsctl add-br ovsbr0 – set bridge ovsbr0 datapath_type=netdev
+ ovs-vsctl add-port ovsbr0 myeth1 – set Interface myeth1 type=dpdk options:dpdk-devargs=net_tap1,iface=myeth1
[root@hp-dl388g10-03 ovs_bond_function]# ovs-vsctl show
e2d39037-c1f5-4bc7-bf19-b3a57b5bf5e6
Bridge ovsbr0
datapath_type: netdev
Port myeth1
Interface myeth1
type: dpdk
options: {dpdk-devargs="net_tap1,iface=myeth1"}
Port ovsbr0
Interface ovsbr0
type: internal
ovs_version: "2.17.1"

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