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Bug
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Resolution: Not a Bug
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Undefined
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None
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rhel-9.5
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None
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No
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None
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rhel-sst-virtualization-storage
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ssg_virtualization
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None
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False
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None
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None
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None
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None
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None
Please provide the package NVR for which bug is seen:
libvirt-10.5.0-4.el9.x86_64
qemu-kvm-9.0.0-7.el9.x86_64
virtiofsd-1.11.1-1.el9.x86_64
How reproducible:
100%
Steps to reproduce:
1. Prepare a guest with virtiofs device, virtiofsd in unprivileged user namespace
$ virsh dumpxml lizhu --xpath //filesystem
<filesystem type="mount" accessmode="passthrough">
<driver type="virtiofs" queue="1024"/>
<binary path="/usr/libexec/virtiofsd" xattr="on">
<cache mode="always"/>
<sandbox mode="namespace"/>
<thread_pool size="16"/>
</binary>
<idmap>
<uid start="0" target="1001" count="1"/>
<uid start="1" target="165536" count="65536"/>
<gid start="0" target="1001" count="1"/>
<gid start="1" target="165536" count="65536"/>
</idmap>
<source dir="/home/lizhu/path"/>
<target dir="mount_tag"/>
<alias name="fs0"/>
<address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
</filesystem>
2. Mount virtiofs in guest
[Guest OS]# mount -t virtiofs mount_tag /mnt [Guest OS]# ll /mnt/ total 0 -rw-r--r--. 1 root root 0 Aug 15 19:04 testfile
3. Check the shared dir in target host, data under the shared dir are different with that in source host
[Target host]$ pwd; ll /home/lizhu/path total 0
4. Try to migrate the guest to target host
$ virsh migrate lizhu qemu+ssh://lizhu@lenovo-sr630-13.lab.eng.pek2.redhat.com/session --live --verbose --p2p
Migration: [100.00 %]error: internal error: QEMU unexpectedly closed the monitor (vm='lizhu'): 2024-08-15T11:16:09.188877Z qemu-kvm: -device {"driver":"cirrus-vga","id":"video0","bus":"pcie.0","addr":"0x1"}: warning: 'cirrus-vga' is deprecated, please use a different VGA card instead
2024-08-15T11:16:17.176925Z qemu-kvm: Error loading back-end state of virtio-user-fs device /machine/peripheral/fs0/virtio-backend (tag: "mount_tag"): Back-end failed to process its internal state
2024-08-15T11:16:17.176958Z qemu-kvm: Failed to load vhost-user-fs-backend:back-end
2024-08-15T11:16:17.176972Z qemu-kvm: error while loading state for instance 0x0 of device '0000:00:02.6:00.0/vhost-user-fs'
2024-08-15T11:16:17.183952Z qemu-kvm: load of migration failed: Input/output error
5. Check the log in target host
$ ll /home/lizhu/.cache/libvirt/qemu/log/lizhu-fs0-virtiofsd.log [2024-08-15T11:16:09Z WARN virtiofsd::limits] Failure when trying to set the limit to 1000000, the hard limit (524288) of open file descriptors is used instead. [2024-08-15T11:16:09Z INFO virtiofsd] Waiting for vhost-user socket connection... [2024-08-15T11:16:09Z INFO virtiofsd] Client connected, servicing requests [2024-08-15T11:16:17Z ERROR virtiofsd] Migration failed: Failed to load state: Inode 2: Opening /testfile: No such file or directory (os error 2) [2024-08-15T11:16:17Z INFO virtiofsd] Client disconnected, shutting down
Expected result:
Migration succeed
Additional info:
For privileged virtiofsd, even the data in shared dir are different, migration can be successful, the behavior for privileged and unprivileged virtiofsd are different.
