Bug 922589 - e1000/rtl8139: qemu mac address can not be changed via set the hardware address in guest
Summary: e1000/rtl8139: qemu mac address can not be changed via set the hardware addre...
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Amos Kong
QA Contact: Virtualization Bugs
Depends On:
Blocks: 1300626
TreeView+ depends on / blocked
Reported: 2013-03-18 02:19 UTC by mazhang
Modified: 2016-09-20 04:41 UTC (History)
9 users (show)

Fixed In Version: qemu-kvm-1.5.3-17.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1300626 (view as bug list)
Last Closed: 2014-06-13 10:24:00 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description mazhang 2013-03-18 02:19:27 UTC
Description of problem:
RHEL7 guest , change mac address in guest, but check the nic address in qemu monitor, it did not changed, e1000 and rtl8139 met this issue, virtio-net-pci did not.

Version-Release number of selected component (if applicable):
host: RHEL7 Alpha3
kernel: 3.8.0-0.40.el7.x86_64
qemu: qemu-kvm-1.4.0-1.el7.x86_64

guest: RHEL7 Alpha3
kernel: 3.8.0-0.40.el7.x86_64

How reproducible:

Steps to Reproduce:
1.Boot a guest with:
-netdev tap,id=hostnet0,downscript=no,vhost=on -device e1000,netdev=hostnet0,id=net0,mac=00:1a:4a:2e:28:1c,bus=pci.0,addr=0x4,bootindex=3

2.Change mac address in guest
#ifconfig eth0 hw ether 00:1a:4a:2e:11:11

3.Check the mac address in guest and qemu monitor

Actual results:
1 mac address changed in guest:
ether 00:1a:4a:2e:11:11  txqueuelen 1000  (Ethernet)

2 mac address didn't changed in qemu monitor:
(qemu) info network
net0: index=0,type=nic,model=e1000,macaddr=00:1a:4a:2e:28:1c
 \ hostnet0: index=0,type=tap,ifname=tap0,script=/etc/qemu-ifup,downscript=no

Expected results:
mac address changed in qemu monitor

Additional info:

Comment 2 Hai Huang 2013-03-19 13:07:17 UTC
Please reassign/dispatch as appropriate. Thanks.

Comment 3 Amos Kong 2013-03-20 02:27:27 UTC
This bug is already in my todo list, I touched it when I worked on virtio-net mac programming. Qemu never updates network info after guest changes mac of e1000. I will solve it.

Comment 4 Qian Guo 2013-03-26 07:19:53 UTC
Windows Server 2012 guest, w/ virtio-net-pci, hit this problem, so update this case.

Comment 5 Amos Kong 2013-10-17 07:09:43 UTC
(In reply to Qian Guo from comment #4)
> Windows Server 2012 guest, w/ virtio-net-pci, hit this problem, so update
> this case.

Please file a new bug for virtio-win

Comment 6 Amos Kong 2013-10-17 07:10:51 UTC
Posted patches to fix rtl8139 & e1000


Comment 7 Qian Guo 2013-10-17 07:38:42 UTC
(In reply to Amos Kong from comment #5)
> (In reply to Qian Guo from comment #4)
> > Windows Server 2012 guest, w/ virtio-net-pci, hit this problem, so update
> > this case.
> Please file a new bug for virtio-win

Test this with components:
# uname -r
# rpm -q qemu-kvm-rhev

and a 32bit windows8.1 guest with virtio-win-prewhql-72 installed, not hit such issue:

1.Boot guest with virtio-net-pci:
..-netdev tap,id=netdev0,vhost=on,script=/etc/qemu-ifup -device virtio-net-pci,mac=00:1b:21:7a:16:10,netdev=netdev0 ...

2.change mac inside guest to 020202020202
3.Under hmp:
(qemu) info network
virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=02:02:02:02:02:02
 \ netdev0: index=0,type=tap,ifname=tap0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown

so according to above, not hit this issue, won't file such bug

Comment 8 Qian Guo 2013-10-17 08:20:43 UTC
And test with windows 2012 64bit, installed virtio-win-prewhql-72, not hit such issue, step and result are same as comment #7

Comment 9 Miroslav Rezanina 2013-11-07 15:55:56 UTC
Fix included in qemu-kvm-1.5.3-17.el7

Comment 10 Miroslav Rezanina 2013-11-07 15:57:17 UTC
Fix included in qemu-kvm-1.5.3-17.el7

Comment 12 Qian Guo 2013-11-28 08:32:52 UTC
Reproduced by qemu-kvm-1.5.3-9.el7.x86_64
1.Boot a RHEL7 guest:
# /usr/libexec/qemu-kvm -M pc -cpu Penryn -enable-kvm -m 4096 -smp 4,socket=1,cores=4,threads=1 -name rhel7 -nodefaults -nodefconfig -drive file=/home/rhel7base.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,werror=stop,rerror=stop,aio=native -device virtio-scsi-pci,id=virtio-disk0 -device scsi-hd,bus=virtio-disk0.0,drive=drive-virtio-disk0,id=scsi-hd -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -vnc :10 -vga std -monitor stdio -boot menu=on -netdev tap,id=netdev0,vhost=on,script=/etc/ovs-ifup,downscript=/etc/ovs-ifdown -device e1000,mac=0a:ae:4e:1e:d1:4a,netdev=netdev0,id=net0  -qmp tcp:0:5555,server,nowait

2.Under hmp, check the mac address
(qemu) info network
net0: index=0,type=nic,model=e1000,macaddr=0a:ae:4e:1e:d1:4a
 \ netdev0: index=0,type=tap,ifname=tap0,script=/etc/ovs-ifup,downscript=/etc/ovs-ifdown

3.Inside guest, change mac address:
#ifconfig eth0 hw ether 0a:ae:4e:1e:d1:01

Under hmp, re-check the mac address:
net0: index=0,type=nic,model=e1000,macaddr=0a:ae:4e:1e:d1:4a
 \ netdev0: index=0,type=tap,ifname=tap0,script=/etc/ovs-ifup,downscript=/etc/ovs-ifdown

the mac address is not changed, so this bug is reproduced by qemu-kvm-1.5.3-9.el7.x86_64

Verify this bug with qemu-kvm-1.5.3-19.el7.x86_64

Steps as above,
Result: after change mac address inside guest, re-check the mac address under hmp:

(qemu) info network
net0: index=0,type=nic,model=e1000,macaddr=0a:ae:4e:1e:d1:01
 \ netdev0: index=0,type=tap,ifname=tap0,script=/etc/ovs-ifup,downscript=/etc/ovs-ifdown

The mac address is set as the new one as changed inside guest.

So, according to above, this bug is fixed by qemu-kvm-1.5.3-19.el7.x86_64.

Comment 14 Ludek Smid 2014-06-13 10:24:00 UTC
This request was resolved in Red Hat Enterprise Linux 7.0.

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