Bug 593256

Summary: Unable to set readonly flag for floppy disks
Product: Red Hat Enterprise Linux 6 Reporter: Daniel Berrangé <berrange>
Component: qemu-kvmAssignee: Gerd Hoffmann <kraxel>
Status: CLOSED CURRENTRELEASE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: low    
Version: 6.0CC: dyuan, lihuang, mjenner, ndai, tburke, virt-maint
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: qemu-kvm-0.12.1.2-2.71.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-07-11 19:34:22 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: 593237    

Description Daniel Berrangé 2010-05-18 10:35:56 UTC
Description of problem:
Attempting to set a readonly floppy fails with

qemu: readonly flag not supported for drive with this interface


Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.52.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. /usr/libexec/qemu-kvm -M rhel6.0.0  -drive file=/var/lib/libvirt/images/fd.img,if=none,id=drive-fdc0-0-0,readonly=on,format=raw  -global isa-fdc.driveA=drive-fdc0-0-0
2.
3.
  
Actual results:
qemu: readonly flag not supported for drive with this interface


Expected results:
QEMU boots

Additional info:

Comment 1 RHEL Program Management 2010-05-18 10:55:39 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Comment 2 Gerd Hoffmann 2010-05-26 12:28:01 UTC
Patch posted upstream, kwolf picked it into the block branch.
http://patchwork.ozlabs.org/patch/53598/

Comment 6 Mike Cao 2010-06-08 05:06:38 UTC
Reproduce it in qemu-kvm-0.12.1.2-2.69.el6

Verified in qemu-kvm-0.12.1.2-2.71.el6

Steps :
1.start VM with readonly floppy
#/usr/libexec/qemu-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name tt -uuid `uuidgen` -rtc-td-hack -boot c -drive file=/home/win7_64,if=none,id=drive-ide0-0-0,boot=on,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive file=/home/virtio-drivers.vfd,readonly=on,if=none,id=drive-fdc0-0-0 -global isa-fdc.driveA=drive-fdc0-0-0 -net nic,macaddr=20:40:50:12:23:21,model=virtio,vlan=0 -net tap,script=/etc/qemu-ifup,vlan=0 -vnc :8 -monitor stdio
2.In the qemu monitor ,check floppy status by using (qemu)info block
3.In the guest ,check floppy disk is readonly or not.

Actual Results:
After step2:drive-fdc0-0-0: type=hd removable=0 file=/home/virtio-drivers.vfd ro=1 drv=raw encrypted=0
After step3,Can not write in the floppy disk.the disk is readonly mode.

Readonly flag can be used for floppy disks
the bug has already been fixed.

Comment 8 lihuang 2010-07-11 19:34:05 UTC
closing according to #c6