[Virtio-fs] xfstest results for virtio-fs on aarch64

[qi.fuli at fujitsu.com]

Hello,

We have run the generic tests of xfstest for virtio-fs[1] on aarch64[2],
here we selected some tests that did not run or failed to run,
and we categorized them, basing on the reasons in our understanding.

  * Category 1: generic/003, generic/192
    Error: access time error
    Reason: file_accessed() not run
  * Category 2: generic/089, generic/478, generic/484, generic/504
    Error: lock error
  * Category 3: generic/426, generic/467, generic/477
    Error: open_by_handle error
  * Category 4: generic/551
    Error: kvm panic
  * Category 5: generic/011, generic/013
    Error: cannot remove file
    Reason: NFS backend
  * Category 6: generic/035
    Error: nlink is 1, should be 0
  * Category 7: generic/125, generic/193, generic/314
    Error: open/chown/mkdir permission error
  * Category 8: generic/469
    Error: fallocate keep_size is needed
    Reason: NFS4.0 backend
  * Category 9: generic/323
    Error: system hang
    Reason: fd is close before AIO finished

We would like to know if virtio-fs does not support these tests in
the specification or they are bugs that need to be fixed.
It would be very appreciated if anyone could give some comments.

[1] qemu: https://gitlab.com/virtio-fs/qemu/tree/virtio-fs-dev
     start qemu script:
     $VIRTIOFSD -o vhost_user_socket=/tmp/vhostqemu1 -o 
source=/root/virtio-fs/test1/ -o cache=always -o xattr -o flock -d &
     $VIRTIOFSD -o vhost_user_socket=/tmp/vhostqemu2 -o 
source=/root/virtio-fs/test2/ -o cache=always -o xattr -o flock -d &
     $QEMU -M virt,accel=kvm,gic_version=3 \
         -cpu host \
         -smp 8 \
         -m 8192\
         -nographic \
         -serial mon:stdio \
         -netdev tap,id=net0 -device 
virtio-net-pci,netdev=net0,id=net0,mac=XX:XX:XX:XX:XX:XX \
         -object 
memory-backend-file,id=mem,size=8G,mem-path=/dev/shm,share=on \
         -numa node,memdev=mem \
         -drive 
file=/root/virtio-fs/AAVMF/AAVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on 
\
         -drive file=$VARS,if=pflash,format=raw,unit=1 \
         -chardev socket,id=char1,path=/tmp/vhostqemu1 \
         -device 
vhost-user-fs-pci,queue-size=1024,chardev=char1,tag=myfs1,cache-size=0 \
         -chardev socket,id=char2,path=/tmp/vhostqemu2 \
         -device 
vhost-user-fs-pci,queue-size=1024,chardev=char2,tag=myfs2,cache-size=0 \
         -drive if=virtio,file=/var/lib/libvirt/images/guest.img

[2] host kernel: 4.18.0-80.4.2.el8_0.aarch64
     guest kernel: 5.4-rc1
     Arch: Arm64
     backend: NFS 4.0

Thanks,
QI Fuli