Bug 1326264
| Summary: | scsi-block reports whole device size when passing through a partition | ||||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | aihua liang <aliang> | ||||||
| Component: | qemu-kvm-rhev | Assignee: | Fam Zheng <famz> | ||||||
| Status: | CLOSED WONTFIX | QA Contact: | Virtualization Bugs <virt-bugs> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 7.3 | CC: | aliang, knoel, meyang, ngu, pingl, shuang, virt-maint, xutian | ||||||
| Target Milestone: | rc | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2016-06-01 02:00:13 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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It doesn't make much sense to pass a block partition as scsi-block device. The host happens to accept SG ioctl on both a sdX block device or on its partition, which can be told by running sg_readcap(8). A "fix", if any, would be detect this case in QEMU and refuse to start the guest. But I'm not sure if that is doable, though. Is this reproducible with libvirt? (In reply to Fam Zheng from comment #2) > It doesn't make much sense to pass a block partition as scsi-block device. > The host happens to accept SG ioctl on both a sdX block device or on its > partition, which can be told by running sg_readcap(8). > > A "fix", if any, would be detect this case in QEMU and refuse to start the > guest. But I'm not sure if that is doable, though. > > Is this reproducible with libvirt? As you said that libvirt prevent to create VM disk from a scsi partition; libvirt report error like: internal error: process exited while connecting to monitor: 2016-04-14T06:53:34.599155Z qemu-kvm: -device scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1: INQUIRY failed see our xml file in attachment. Created attachment 1147051 [details]
VM create xml
I'm confused. Why does the command line in comment 0 run, but not the one in comment 3? What is the difference? Can you post the full command line executed by libvirt? (In reply to Fam Zheng from comment #5) > I'm confused. Why does the command line in comment 0 run, but not the one in > comment 3? What is the difference? Can you post the full command line > executed by libvirt? Commands as bellow: /usr/libexec/qemu-kvm -name rhel7.1 -S \ -machine pc-i440fx-rhel7.2.0,accel=kvm,usb=off,vmport=off \ -cpu SandyBridge -m 1024 -realtime mlock=off \ -smp 1,sockets=1,cores=1,threads=1 \ -uuid da3ad4b0-71ae-469a-b912-33f2c8c3658e -no-user-config -nodefaults \ -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-rhel7.1/monitor.sock,server,nowait \ -mon chardev=charmonitor,id=monitor,mode=control \ -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet \ -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 \ -boot strict=on \ -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 \ -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 \ -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 \ -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 \ -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x5 \ -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x7 \ -drive file=/dev/sdb1,if=none,id=drive-scsi0-0-0-0,format=raw,cache=none -device scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 \ -netdev tap,fd=23,id=hostnet0 \ -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:99:8c:cd,bus=pci.0,addr=0x3 \ -chardev pty,id=charserial0 \ -device isa-serial,chardev=charserial0,id=serial0 \ -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-rhel7.1/org.qemu.guest_agent.0,server,nowait \ -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 \ -chardev spicevmc,id=charchannel1,name=vdagent \ -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=com.redhat.spice.0 \ -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on \ -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x2 \ -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 \ -chardev spicevmc,id=charredir0,name=usbredir \ -device usb-redir,chardev=charredir0,id=redir0 \ -chardev spicevmc,id=charredir1,name=usbredir \ -device usb-redir,chardev=charredir1,id=redir1 \ -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 \ -msg timestamp=on It's clear enough that this is not a qemu-kvm problem. |
Created attachment 1146298 [details] Seabios log Description of problem: Wrong disk size caculated when install VM on a passthrough scsi block image seabios-1.7.5-11.el7.x86_64 also have this problem. Version-Release number of selected component (if applicable): Host kernel version:3.10.0-371.el7.x86_64 seabios version:seabios-1.9.1-2.el7.x86_64 guest kernel version:3.10.0-363.el7.x86_64（installed from cdrom ISO） How reproducible: 100% Steps to Reproduce: 1.Login to iscsi target on iscsi server. commands: iscsiadm -m discovery -t st -p <iscsi server ip> iscsiadm -m node -T <inicator> -p <iscsi server ip> -l 2.check the iscsi disk using command:fdisk -l /dev/sd* size of /dev/sdb is 40G. 3.Create a new partation /dev/sdb1 (disk size=10G) on iscsi disk and format it, then check the disk img size using command: qemu-img info /dev/sdb1. qemu-img report virtual size of /dev/sdb1 is 10G. 4.Install VM on the passthru iscsi disk "/dev/sdb1". /usr/libexec/qemu-kvm -name rhel7.1-4 \ -S \ -machine pc-i440fx-rhel7.2.0,accel=kvm,usb=off,vmport=off \ -cpu SandyBridge -m 4096 -smp 8,sockets=8,cores=1,threads=1 \ -uuid 1534fa42-4818-4493-9f67-eee5ba758385 -no-user-config -nodefaults \ -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/test1,server,nowait \ -mon chardev=qmp_id_catch_monitor,id=monitor,mode=control \ -boot strict=on,menu=on,splash-time=12000 \ -drive file=/home/kvm_autotest_root/iso/linux/RHEL-7.2-20151030.0-Server-x86_64-dvd1.iso,if=none,id=drive-ide0-0-0,readonly=on,format=raw \ -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \ -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x5 \ -drive file=/dev/sdb1,if=none,id=drive-scsi0-0-0-0,format=raw,cache=none,aio=native,snapshot=off,media=disk \ -device scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0 \ -spice port=3001,ipv4,disable-ticketing \ -vga qxl \ -enable-kvm \ -chardev socket,id=seabioslog_id_20160406-154254-IFn4waYv,path=/tmp/seabios-20160406-154254-IFn4waYv,server,nowait \ -device isa-debugcon,chardev=seabioslog_id_20160406-154254-IFn4waYv,iobase=0x402 \ -monitor stdio Actual results: Guest os report disk size is 40G. Expected results: Guest os report disk size should be 10G. Additional info: seabios log,please see the attachment.