[vfio-users] After update, input-linux errors with Operation not permitted.

[Jonathan Scruggs]

Hi all,

This was working perfectly last week, but then after doing a system update
yesterday after not doing one for a week, I now have the Operation not
permitted error.

These are the package versions and use flags
# emerge qemu libvirt virt-manager -pv

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] app-emulation/virt-manager-1.4.0-r1::gentoo  USE="gtk
(policykit) -debug -gnome-keyring -sasl" LINGUAS="-as -bg -bn_IN -bs -ca
-cmn -cs -da -de -en_GB -es -fi -fr -gu -hi -hr -hu -is -it -ja -kn -ko -ml
-mr -ms -nb -nl -or -pa -pl -pt -pt_BR -ro -ru -sk -sr -sr at latin -sv -ta
-te -tr -uk -vi -zh_CN -zh_TW" PYTHON_TARGETS="python2_7" 0 KiB
[ebuild   R    ] app-emulation/qemu-2.6.0::gentoo  USE="aio alsa bzip2 caps
curl fdt filecaps gtk jpeg lzo ncurses nls opengl pin-upstream-blobs png
pulseaudio python sdl seccomp spice threads usb usbredir uuid vhost-net vnc
xattr -accessibility -bluetooth -debug -glusterfs -gnutls -gtk2 -infiniband
-iscsi -nfs -numa -rbd -sasl -sdl2 (-selinux) -smartcard -snappy -ssh
-static -static-softmmu -static-user -systemtap -tci {-test} -vde -virgl
-virtfs -vte -xen -xfs" LINGUAS="-de_DE -fr_FR -hu -it -tr -zh_CN"
PYTHON_TARGETS="python2_7" QEMU_SOFTMMU_TARGETS="x86_64 -aarch64 -alpha
-arm -cris -i386 -lm32 -m68k -microblaze -microblazeel -mips -mips64
-mips64el -mipsel -moxie -or32 -ppc -ppc64 -ppcemb -s390x -sh4 -sh4eb
-sparc -sparc64 -tricore -unicore32 -xtensa -xtensaeb"
QEMU_USER_TARGETS="x86_64 -aarch64 -alpha -arm -armeb -cris -i386 -m68k
-microblaze -microblazeel -mips -mips64 -mips64el -mipsel -mipsn32
-mipsn32el -or32 -ppc -ppc64 -ppc64abi32 -ppc64le -s390x -sh4 -sh4eb -sparc
-sparc32plus -sparc64 -tilegx -unicore32" 0 KiB
[ebuild   R    ] app-emulation/libvirt-2.1.0-r1:0/2.1.0::gentoo  USE="caps
libvirtd macvtap nls (policykit) qemu udev vepa virt-network -apparmor
-audit -avahi -firewalld -fuse -glusterfs -iscsi -lvm -lxc -nfs -numa
-openvz -parted -pcap -phyp -rbd -sasl (-selinux) -uml -virtualbox
(-wireshark-plugins) -xen" 0 KiB

This is the full error:
Error starting domain: internal error: process exited while connecting to
monitor: 2016-08-18T16:44:16.298580Z qemu-system-x86_64: -object
input-linux,id=kdb1,evdev=/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.2-event-kbd,grab_all=on,repeat=on:
Could not open
'/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.2-event-kbd': Operation
not permitted

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 88, in
cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 124, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 83, in
newfn
    ret = fn(self, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1404, in
startup
    self._backend.create()
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1035, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error: process exited while connecting to monitor:
2016-08-18T16:44:16.298580Z qemu-system-x86_64: -object
input-linux,id=kdb1,evdev=/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.2-event-kbd,grab_all=on,repeat=on:
Could not open
'/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.2-event-kbd': Operation
not permitted

This is the relevant part of my config:
  <qemu:commandline>
    <qemu:arg value='-object'/>
    <qemu:arg
value='input-linux,id=kdb1,evdev=/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.2-ev$
    <qemu:arg value='-object'/>
    <qemu:arg
value='input-linux,id=kdb2,evdev=/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.0-ev$
    <qemu:arg value='-object'/>
    <qemu:arg
value='input-linux,id=kdb3,evdev=/dev/input/by-path/pci-0000:00:14.0-usb-0:9.1:1.1-ev$
    <qemu:arg value='-object'/>
    <qemu:arg
value='input-linux,id=mouse,evdev=/dev/input/by-path/pci-0000:00:14.0-usb-0:9.2:1.0-e$
  </qemu:commandline>

Thanks,
Jon
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