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Bug
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Resolution: Unresolved
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Undefined
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rhel-10.1
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libguestfs-fssupport-10.1-3.el10
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No
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Low
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rhel-virt-tools
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None
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False
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False
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None
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None
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Pass
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Manual
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Unspecified
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Unspecified
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Unspecified
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x86_64
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None
Description of problem：
Virt-v2v fails to convert sles guests with btrfs fs when newer kernel packages than required by libguestfs-fssupport are installed in the server
Version-Release number of selected component (if applicable):
virt-v2v-2.8.0-1.el10.x86_64
libguestfs-1.56.0-1.el10.1.x86_64
libguestfs-fssupport-10.1-2.el10.x86_64
How reproducible:
100%
Steps:
1. Prepare a server with kernel installed and install libguestfs-fssupport package
# uname -a Linux dell-per740-52.lab.eng.pek2.redhat.com 6.12.0-91.el10.x86_64 #1 SMP PREEMPT_DYNAMIC Tue Jun 3 01:43:57 EDT 2025 x86_64 GNU/Linux # rpm -q libguestfs-fssupport libguestfs-fssupport-10.1-2.el10.x86_64
2. Install newer kernel packages in the server
# rpm -qa |grep kernel kernel-modules-core-6.12.0-89.el10.x86_64 kernel-core-6.12.0-89.el10.x86_64 kernel-modules-6.12.0-89.el10.x86_64 kernel-modules-extra-6.12.0-89.el10.x86_64 kernel-devel-6.12.0-89.el10.x86_64 kernel-6.12.0-89.el10.x86_64 kernel-modules-core-6.12.0-91.el10.x86_64 kernel-core-6.12.0-91.el10.x86_64 kernel-modules-6.12.0-91.el10.x86_64 kernel-modules-extra-6.12.0-91.el10.x86_64 kernel-6.12.0-91.el10.x86_64 kernel-devel-6.12.0-91.el10.x86_64 kernel-srpm-macros-1.0-25.el10.noarch kernel-headers-6.12.0-92.el10.x86_64 kernel-modules-core-6.12.0-92.el10.x86_64 kernel-core-6.12.0-92.el10.x86_64 kernel-modules-6.12.0-92.el10.x86_64 kernel-modules-extra-6.12.0-92.el10.x86_64 kernel-6.12.0-92.el10.x86_64
3. Convert a sles guest with btrfs fs from VMware by virt-v2v
# virt-v2v -ic vpx://non-admin%40vsphere.local@10.73.212.129/data/10.73.212.36/?no_verify=1 -it vddk -io vddk-libdir=/home/vddk8.0.3 -io vddk-thumbprint=CB:9F:B1:9D:33:49:6C:60:AD:3C:A5:16:77:91:5F:CD:1B:24:B1:43 -ip /home/passwd Auto-esx8.0-sles12sp5-with-btrfs-and-vmware-tools [ 0.0] Setting up the source: -i libvirt -ic vpx://non-admin%40vsphere.local@10.73.212.129/data/10.73.212.36/?no_verify=1 -it vddk Auto-esx8.0-sles12sp5-with-btrfs-and-vmware-tools [ 1.7] Opening the source [ 19.5] Checking filesystem integrity before conversion virt-v2v: error: libguestfs error: list_filesystems: mount exited with status 32: mount: /tmp/btrfsj9rrf3: unknown filesystem type 'btrfs'. dmesg(1) may have more information after failed mount system call. If reporting bugs, run virt-v2v with debugging enabled and include the complete output: virt-v2v -v -x [...]
4. Remove kernel packages with version 6.12.0-92 from the server and convert a sles guest with btrfs fs from VMware by virt-v2v again
# rpm -e kernel-devel-6.12.0-92.el10.x86_64 kernel-6.12.0-92.el10.x86_64 kernel-modules-extra-6.12.0-92.el10.x86_64 kernel-modules-6.12.0-92.el10.x86_64 kernel-core-6.12.0-92.el10.x86_64 kernel-modules-core-6.12.0-92.el10.x86_64 # virt-v2v -ic vpx://non-admin%40vsphere.local@10.73.212.129/data/10.73.212.36/?no_verify=1 -it vddk -io vddk-libdir=/home/vddk8.0.3 -io vddk-thumbprint=CB:9F:B1:9D:33:49:6C:60:AD:3C:A5:16:77:91:5F:CD:1B:24:B1:43 -ip /home/passwd Auto-esx8.0-sles12sp5-with-btrfs-and-vmware-tools -o null [ 0.0] Setting up the source: -i libvirt -ic vpx://non-admin%40vsphere.local@10.73.212.129/data/10.73.212.36/?no_verify=1 -it vddk Auto-esx8.0-sles12sp5-with-btrfs-and-vmware-tools [ 1.7] Opening the source [ 20.1] Checking filesystem integrity before conversion [ 159.7] Detecting if this guest uses BIOS or UEFI to boot [ 160.0] Inspecting the source [ 183.0] Checking for sufficient free disk space in the guest [ 183.0] Converting SUSE Linux Enterprise Server 12 SP5 (sles12sp5) to run on KVM virt-v2v: The QEMU Guest Agent will be installed for this guest at first boot. virt-v2v: This guest has virtio drivers installed. [ 223.0] Setting a random seed [ 223.1] SELinux relabelling [ 223.5] Mapping filesystem data to avoid copying unused and blank areas [ 266.7] Checking filesystem integrity after conversion [ 270.0] Closing the overlay [ 270.3] Assigning disks to buses [ 270.3] Checking if the guest needs BIOS or UEFI to boot [ 270.3] Setting up the destination: -o null [ 271.3] Copying disk 1/1 █ 100% [****************************************] [ 313.0] Creating output metadata [ 313.0] Finishing off
Actual result:
As above description
Expect result:
Fix the bug
Additional info
