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Bug
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Resolution: Not a Bug
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Undefined
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None
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rhel-10.1
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None
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No
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None
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rhel-virt-core-libvirt-2
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None
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False
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False
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None
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None
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None
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None
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Unspecified
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Unspecified
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Unspecified
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All
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None
I am not sure whether it is a bug of virtualization components or test scripts. Need more debugging.
Version:
libvirt-11.5.0-4.el10.x86_64
qemu-kvm-10.0.0-14.el10_1.x86_64
iproute-6.14.0-2.el10.x86_64
avocado-vt 109.0-275-gc879ec96a
avocado 103.0
tp-libvirt 983f459daa
Blocked cases:
- virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.rom_not_enabled.vhost_multi_queue.e1000.non_root_user
- virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.default_rom.vhost_multi_queue.e1000.non_root_user
Automation reproducing:
JOB ID : ae032041b92c9f25285beeea17abee12d97ffdba JOB LOG : /var/log/avocado/job-results/job-2025-09-26T04.57-ae03204/job.log (1/1) type_specific.io-github-autotest-libvirt.virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.rom_not_ enabled.vhost_multi_queue.e1000.non_root_user: STARTED (1/1) type_specific.io-github-autotest-libvirt.virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.rom_not_ enabled.vhost_multi_queue.e1000.non_root_user: FAIL: error: Failed to start domain 'unpr-vm'\nerror: Unable to create tap device tap_Eme: Invalid argument\ n (80.00 s) RESULTS : PASS 0 | ERROR 0 | FAIL 1 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0 JOB HTML : /var/log/avocado/job-results/job-2025-09-26T04.57-ae03204/results.html JOB TIME : 81.57 s Test summary: 1-type_specific.io-github-autotest-libvirt.virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.rom_not_enabl ed.vhost_multi_queue.e1000.non_root_user: FAIL No python imaging library installed. Screendump and Windows guest BSOD detection are disabled. In order to enable it, please install python-imaging or the e quivalent for your distro. No python imaging library installed. PPM image conversion to JPEG disabled. In order to enable it, please install python-imaging or the equivalent for your distro. No python imaging library installed. Screendump and Windows guest BSOD detection are disabled. In order to enable it, please install python-imaging or the e quivalent for your distro. No python imaging library installed. PPM image conversion to JPEG disabled. In order to enable it, please install python-imaging or the equivalent for your distro. JOB ID : 93eecf547f81c50f1866aca19e82d419f60e2579 JOB LOG : /var/log/avocado/job-results/job-2025-09-26T04.58-93eecf5/job.log (1/1) type_specific.io-github-autotest-libvirt.virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.default_ rom.vhost_multi_queue.e1000.non_root_user: STARTED (1/1) type_specific.io-github-autotest-libvirt.virtual_network.connectivity_check.ethernet_interface.managed_no.positive_test.tap.one_iface.no_mtu.default_ rom.vhost_multi_queue.e1000.non_root_user: FAIL: error: Failed to start domain 'unpr-vm'\nerror: Unable to create tap device tap_xPW: Invalid argument\n (7 9.49 s) RESULTS : PASS 0 | ERROR 0 | FAIL 1 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0 JOB HTML : /var/log/avocado/job-results/job-2025-09-26T04.58-93eecf5/results.html JOB TIME : 81.05 s
Manual reproducing:
1. Prepare the tap device:
INF=eno8303 ip link add name br_Eme type bridge; ip link set $INF up; ip link set $INF master br_Eme; ip link set br_Eme up; pkill dhclient; sleep 6; dhclient br_Eme; ifconfig $INF 0 ip tuntap add mode tap user test group test name tap_Eme multi_queue;ip link set tap_Eme up;ip link set tap_Eme master br_Eme
2. Prepare a unprivileged VM(user test) with the XML:
Check the interface:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host proto kernel_lo valid_lft forever preferred_lft forever 2: eno8303: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br_Eme state UP group default qlen 1000 link/ether c4:cb:e1:d1:be:f4 brd ff:ff:ff:ff:ff:ff altname enp4s0f0 altname enxc4cbe1d1bef4 inet6 2620:52:0:4884:c6cb:e1ff:fed1:bef4/64 scope global dynamic noprefixroute valid_lft 2591586sec preferred_lft 604386sec inet6 fe80::c6cb:e1ff:fed1:bef4/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: eno8403: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000 link/ether c4:cb:e1:d1:be:f5 brd ff:ff:ff:ff:ff:ff altname enp4s0f1 altname enxc4cbe1d1bef5 1044: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc htb state DOWN group default qlen 1000 link/ether 52:54:00:ae:6b:13 brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 valid_lft forever preferred_lft forever 1110: br_Eme: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether c4:cb:e1:d1:be:f4 brd ff:ff:ff:ff:ff:ff inet 10.72.132.76/22 brd 10.72.135.255 scope global dynamic br_Eme valid_lft 86167sec preferred_lft 86167sec inet6 fe80::c6cb:e1ff:fed1:bef4/64 scope link proto kernel_ll valid_lft forever preferred_lft forever 1111: tap_Eme: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br_Eme state DOWN group default qlen 1000 link/ether d6:b9:32:e5:9c:dd brd ff:ff:ff:ff:ff:ff
Use the tap_Eme for the VM
<interface type="ethernet"> <mac address="52:54:00:41:fe:77"/> <target dev="tap_Eme" managed="no"/> <model type="e1000"/> <rom enabled="no"/> <address type="pci" domain="0x0000" bus="0x01" slot="0x00" function="0x0"/> </interface>
At the user test, create the domain:
[test@dell-per750-68 ~]$ virsh create /tmp/test.xml error: Failed to create domain from /tmp/test.xml error: Unable to create tap device tap_Eme: Invalid argument
Cleanup:
INF=eno8303 ip l del tap_Eme ip link set $INF nomaster; ip link delete br_Eme; pkill dhclient; sleep 5; dhclient $INF
Attachment: text.xml --> the XML for the VM
