Bug 1030174
| Summary: | blockdev-snapshot-sync/snapshot_blkdev considers file //root/sn1 and file /root/sn1 as different files | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Jun Li <juli> |
| Component: | qemu-kvm | Assignee: | Jeff Cody <jcody> |
| Status: | CLOSED WONTFIX | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 7.0 | CC: | acathrow, famz, hhuang, juzhang, michen, shu, virt-maint, xfu |
| 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: | 2013-11-26 19:47:58 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: | |||
Corner case, libvirt will prevent it from happening and there's no consensus upstream. Closing it as WONTFIX. BTW, qemu-kvm direct usage won't be supported in RHEL7. |
Description of problem: Host considers //root/sn1 and /root/sn1 as the same file. But blockdev-snapshot-sync/snapshot_blkdev considers //root/sn1 and /root/sn1 as different files. So blockdev-snapshot-sync/snapshot_blkdev will rewrite file /root/sn1, then qemu-kvm can not do blockdev-snapshot-sync/snapshot_blkdev. Version-Release number of selected component (if applicable): qemu-kvm-rhev-1.5.3-19.el7.x86_64 3.10.0-48.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.Boot qemu with following cli. <cli>: # /usr/libexec/qemu-kvm -S -M pc-i440fx-rhel7.0.0 -cpu SandyBridge -enable-kvm -m 4G -smp 4,sockets=2,cores=2,threads=1 -name juli -uuid 355a2475-4e03-4cdd-bf7b-5d6a59edaa68 -rtc base=localtime,clock=host,driftfix=slew \ -device virtio-scsi-pci,bus=pci.0,addr=0x5,id=scsi0 -drive file=iscsi://10.66.6.82:3260/iqn.2013-11.com.example:storage.disk1.juli.xyz/1,if=none,id=drive-scsi0-0-0,media=disk,cache=none,format=qcow2,werror=stop,rerror=stop,aio=native -device scsi-hd,drive=drive-scsi0-0-0,bus=scsi0.0,scsi-id=0,lun=0,id=juli,bootindex=0 \ -drive file=iscsi://10.66.6.82:3260/iqn.2013-11.com.example:storage.disk1.juli.xyz/3,if=none,id=drive-virtio0-0-0,media=disk,werror=stop,rerror=stop,cache=none,format=qcow2 \ -device virtio-blk-pci,bus=pci.0,drive=drive-virtio0-0-0,id=virtio0-0-0 \ -drive file=/home/ISO/en_windows_8.1_preview_x86_dvd_2358833.iso,if=none,media=cdrom,format=raw,aio=native,id=drive-ide1-0-0 -device ide-drive,drive=drive-ide1-0-0,id=ide1-0-0,bus=ide.0,unit=0,bootindex=4 -device virtio-balloon-pci,id=ballooning -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -net none -k en-us -boot menu=on,reboot-timeout=-1,strict=on -qmp tcp:0:4477,server,nowait -serial unix:/tmp/ttyS0,server,nowait -vnc :3 -spice port=5939,disable-ticketing -vga qxl -global qxl-vga.revision=3 -monitor stdio -monitor tcp:0:7777,server,nowait -monitor unix:/tmp/monitor1,server,nowait \ -netdev tap,id=tap1,vhost=on,queues=4,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown,ifname=tap-juli \ -device virtio-net-pci,netdev=tap1,id=nic1,mq=on,vectors=17,mac=1a:59:0a:4b:aa:94 2.create snapshot via qmp just like the followings: { "execute": "blockdev-snapshot-sync", "arguments": { "device": "drive-scsi0-0-0", "snapshot-file": "/root/sn1", "format": "qcow2" } } { "execute": "blockdev-snapshot-sync", "arguments": { "device": "drive-scsi0-0-0", "snapshot-file": "//root/sn1", "format": "qcow2" } } 3.create a new snapshot via qmp, check the return value. { "execute": "blockdev-snapshot-sync", "arguments": { "device": "drive-scsi0-0-0", "snapshot-file": "//root/sn2", "format": "qcow2" } } Actual results: { "execute": "blockdev-snapshot-sync", "arguments": { "device": "drive-scsi0-0-0", "snapshot-file": "//root/sn2", "format": "qcow2" } } {"error": {"class": "GenericError", "desc": "Could not open '//root/sn1': Could not set AIO state: Too many open files: Too many open files"}} Expected results: blockdev-snapshot-sync/snapshot_blkdev should consider //root/sn1 and /root/sn1 as the same files. Do not rewrite file /root/sn1. Additional info: