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Bug 601044

Summary:	Could not add USB device to guest
Product:	Red Hat Enterprise Linux 5	Reporter:	Amos Kong <akong>
Component:	kvm	Assignee:	Kevin Wolf <kwolf>
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.6	CC:	ailan, mkenneth, virt-maint, ykaul
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-06-10 09:48:08 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:
Bug Blocks:	580948

Description Amos Kong 2010-06-07 05:16:09 UTC

Description of problem:

Try to add a usb device to a rhel5 guest, but it failed when using rhel5 host,
and qemu outputs "Warning: could not add USB device disk:format=qcow2:/tmp/usbdevice.qcow2"
It's fine when using rhel6 host.

Version-Release number of selected component (if applicable):
host kernel: 2.6.18-201.el5
guest kernel: 2.6.18-201.el5

# rpm -qa |grep kvm
etherboot-zroms-kvm-5.4.4-12.el5
kvm-83-181.el5
etherboot-zroms-kvm-5.4.4-10.el5
etherboot-zroms-kvm-5.4.4-13.el5
kvm-debuginfo-83-181.el5
kmod-kvm-83-181.el5
kvm-tools-83-181.el5
kvm-qemu-img-83-181.el5

How reproducible:
100%

Steps to Reproduce:
1. create a image
host)# qemu-img create -f qcow2 /tmp/usbdevice.qcow2 1G
2. boot up guest with "-usbdevice disk:format=qcow2:/tmp/usbdevice.qcow2"
3. check usb infomation by monitor
qemu) info usb
4. login guest and check the disk infomation
guest) fdisk -l
  
Actual results:
could not add 'disk' to guest

Expected results:
usb device can be added to guest

Additional info:
command line:
#  /home/devel/autotest/client/tests/kvm/qemu -name vm1 -monitor tcp:0:6001,server,nowait -drive file=/home/devel/autotest/client/tests/kvm/images/RHEL-Server-5.5-64.qcow2,if=ide,cache=none,boot=on -net nic,vlan=0,model=e1000,macaddr=02:8F:F3:8D:18:14 -net tap,vlan=0,ifname=e1000_0_6001,script=/home/devel/autotest/client/tests/kvm/scripts/qemu-ifup,downscript=no -m 512 -smp 1 -soundhw ac97 -usbdevice disk:format=qcow2:/tmp/usbdevice.qcow2 -redir tcp:5000::22 -vnc :0 -usbdevice tablet -rtc-td-hack -no-hpet -cpu qemu64,+sse2 -no-kvm-pit-reinjection -serial unix:/tmp/serial-20100602-095130-xL2n,server,nowait
interface_audio_init: 
line_in_init: 
line_out_init: freq 44100 channels 2 format AUD_FMT_S16 HOST_ENDIANNESS
Warning: could not add USB device disk:format=qcow2:/tmp/usbdevice.qcow2

Comment 2 Kevin Wolf 2010-06-10 07:54:03 UTC

Amos, can you please double-check if you had a typo somewhere, maybe a wrong filename or something? It seems to work fine for me, both with the current 5.6 tree and with the 5.4 version.

Comment 3 Amos Kong 2010-06-10 09:10:29 UTC

I checked again on different machines,

The bug can be reproduced with rhel5(host kernel 2.6.18-201, kvm-83-181)
But when do the same test on rhel6 host(2.6.32-33, qemu-kvm-0.12.1.2-2.69), usb device can be identified.

Comment 4 Kevin Wolf 2010-06-10 09:48:08 UTC

Turns out usb-msd is simply not supported on RHEL 5 and therefore compiled out. Closing as NOTABUG.