Bug 1007224 - Introduce bs->zero_beyond_eof
Introduce bs->zero_beyond_eof
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm (Show other bugs)
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: Asias He
Virtualization Bugs
: 1005755 (view as bug list)
Depends On:
Blocks: 1007226
  Show dependency treegraph
Reported: 2013-09-12 03:16 EDT by Asias He
Modified: 2013-12-05 05:26 EST (History)
13 users (show)

See Also:
Fixed In Version: qemu-kvm-
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1007226 (view as bug list)
Last Closed: 2013-11-21 02:13:18 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

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Description Asias He 2013-09-12 03:16:19 EDT
Description of problem:

        In 4146b46c42e0989cb5842e04d88ab6ccb1713a48 (block: Produce zeros when
        protocols reading beyond end of file), we break qemu-iotests ./check
        -qcow2 022. This happens because qcow2 temporarily sets ->growable = 1
        for vmstate accesses (which are stored beyond the end of regular image
        We introduce the bs->zero_beyond_eof to allow qcow2_load_vmstate() to
        disable ->zero_beyond_eof temporarily in addition to enable ->growable.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:

Run the qemu-iotests ./check -qcow2 022 test

Actual results:

qemu-iotest does not pass

Expected results:

qemu-iotest should pass

Additional info:

The fix is in upstream now. I will backport to rhel shortly.
Comment 2 Qunfang Zhang 2013-09-13 03:07:56 EDT
Confirmed with Asias, this bug could also be reproduce by 'savevm'/'loadvm'.

Reproduced on qemu-kvm- 'loadvm' failed and prompt error, guest paused.

(qemu) savevm 1
(qemu) info status 
VM status: running
(qemu) info snapshots 
Snapshot devices: drive-virtio-disk0
Snapshot list (from drive-virtio-disk0):
ID        TAG                 VM SIZE                DATE       VM CLOCK
1         1                      284M 2013-09-13 14:49:28   00:00:16.677
(qemu) lo
logfile   log       loadvm    
(qemu) loadvm 1 
Error -22 while loading VM state
(qemu) info status 
VM status: paused (restore-vm)
Comment 4 Ademar Reis 2013-09-16 16:17:06 EDT
*** Bug 1005755 has been marked as a duplicate of this bug. ***
Comment 7 Qunfang Zhang 2013-10-10 00:41:05 EDT
Verified this bug on qemu-kvm-, passed.

[root@localhost home]# uname -r
[root@localhost home]# rpm -q qemu-kvm

#  /usr/libexec/qemu-kvm -M rhel6.5.0 -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -enable-kvm -name t2-rhel6.4-32 -uuid 61b6c504-5a8b-4fe1-8347-6c929b750dde -k en-us -rtc base=localtime,clock=host,driftfix=slew -no-kvm-pit-reinjection -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device usb-tablet,id=input0 -drive file=/home/RHEL-Server-6.4-64-virtio.qcow2,if=none,id=disk0,format=qcow2,werror=stop,rerror=stop,aio=native -device ide-drive,bus=ide.0,unit=1,drive=disk0,id=disk0  -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,drive=drive-ide0-1-0,bus=ide.1,unit=0,id=cdrom -netdev tap,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=44:37:E6:5E:91:85,bus=pci.0,addr=0x5 -monitor stdio -qmp tcp:0:6666,server,nowait -chardev socket,path=/tmp/isa-serial,server,nowait,id=isa1 -device isa-serial,chardev=isa1,id=isa-serial1 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x8 -chardev socket,id=charchannel0,path=/tmp/serial-socket,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm -chardev socket,path=/tmp/foo,server,nowait,id=foo -device virtconsole,chardev=foo,id=console0 -chardev spicevmc,id=charchannel1,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=com.redhat.spice.0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x9 -spice port=5930,disable-ticketing -vga qxl -global qxl-vga.vram_size=67108864 -k en-us -boot c -chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 -device virtserialport,bus=virtio-serial0.0,chardev=qga0,name=org.qemu.guest_agent.0  -global  PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0
QEMU 0.12.1 monitor - type 'help' for more information
(qemu) main_channel_link: add main channel client
main_channel_handle_parsed: agent start
main_channel_handle_parsed: net test: latency 99.500000 ms, bitrate 5868194842 bps (5596.346704 Mbps)
inputs_connect: inputs channel client create

(qemu) savevm 1
(qemu) info snapshots 
Snapshot devices: disk0
Snapshot list (from disk0):
ID        TAG                 VM SIZE                DATE       VM CLOCK
1         1                      579M 2013-10-10 11:41:42   00:01:05.407
(qemu) info status 
VM status: running
(qemu) lo
logfile   log       loadvm    
(qemu) loadvm 1
(qemu) info status 
VM status: running
Comment 9 errata-xmlrpc 2013-11-21 02:13:18 EST
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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