Bug 1811877
| Summary: | 'qemu-img create' snapshot files should restrict the options for backing files | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 9 | Reporter: | Tingting Mao <timao> |
| Component: | qemu-kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| qemu-kvm sub component: | Storage | QA Contact: | Tingting Mao <timao> |
| Status: | CLOSED WONTFIX | Docs Contact: | |
| Severity: | low | ||
| Priority: | low | CC: | coli, jinzhao, juzhang, kwolf, virt-maint, xuwei |
| Version: | 9.0 | Keywords: | Triaged |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-09-10 07:27:15 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: | |||
Move RHEL-AV bugs to RHEL9. If necessary to resolve in RHEL8, then clone to the current RHEL8 release. After evaluating this issue, there are no plans to address it further or fix it in an upcoming release. Therefore, it is being closed. If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened. |
Description of problem: As subject. Version-Release number of selected component (if applicable): qemu-kvm-4.2.0-13.module+el8.2.0+5898+fb4bceae kernel-4.18.0-176.el8 How reproducible: 100% Steps to Reproduce: Steps: 1. Create a base image. # qemu-img create -f raw base.img 2G 2. Create snapshot file based on the image with both '-F' and '-o backing_fmt'. # qemu-img create -f qcow2 -b base.img -F raw -o backing_fmt=raw sn.qcow2 Formatting 'sn.qcow2', fmt=qcow2 size=2147483648 backing_file=base.img backing_fmt=raw cluster_size=65536 lazy_refcounts=off refcount_bits=16 # echo $? 0 # qemu-img info sn.qcow2 image: sn.qcow2 file format: qcow2 virtual size: 2 GiB (2147483648 bytes) disk size: 196 KiB cluster_size: 65536 backing file: base.img backing file format: raw Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false 3. Create snapshot file based on the image with both '-b' and '-o backing_file'. # qemu-img create -f qcow2 -b base.img -F raw -o backing_file=base.img sn.qcow2 Formatting 'sn.qcow2', fmt=qcow2 size=2147483648 backing_file=base.img backing_fmt=raw cluster_size=65536 lazy_refcounts=off refcount_bits=16 # echo $? 0 # qemu-img info sn.qcow2 image: sn.qcow2 file format: qcow2 virtual size: 2 GiB (2147483648 bytes) disk size: 196 KiB cluster_size: 65536 backing file: base.img backing file format: raw Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false 4. Create snapshot file based on the image with both '-b', '-F' and '-o backing_file,backing_fmt'. # qemu-img create -f qcow2 -b base.img -F raw -o backing_file=base.img,backing_fmt=raw sn.qcow2 Formatting 'sn.qcow2', fmt=qcow2 size=2147483648 backing_file=base.img backing_fmt=raw cluster_size=65536 lazy_refcounts=off refcount_bits=16 # echo $? 0 # qemu-img info sn.qcow2 image: sn.qcow2 file format: qcow2 virtual size: 2 GiB (2147483648 bytes) disk size: 196 KiB cluster_size: 65536 backing file: base.img backing file format: raw Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false Actual results: As above. when '-F xx -b xx' and '-o' appear together, there is no error hint info. Expected results: Maybe creating failed with prompt "Can not input '-F xx -b xx' and '-o backing_fmt=xx,backing_file=xx' simultaneously"? Additional info: "-b xxx -F" part makes work when '-F xx -b xx' and '-o' appear together. # qemu-img create -f qcow2 -b base.img -F raw -o backing_file=xxxxx,backing_fmt=xxx sn.qcow2 Formatting 'sn.qcow2', fmt=qcow2 size=2147483648 backing_file=base.img backing_fmt=raw cluster_size=65536 lazy_refcounts=off refcount_bits=16 # echo $? 0 # qemu-img info sn.qcow2 image: sn.qcow2 file format: qcow2 virtual size: 2 GiB (2147483648 bytes) disk size: 196 KiB cluster_size: 65536 backing file: base.img backing file format: raw Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false # qemu-img create -f qcow2 -b xxx -F xxx -o backing_file=base.img,backing_fmt=raw sn.qcow2 qemu-img: sn.qcow2: Unknown driver 'xxx' Could not open backing image to determine size. # echo $? 1