[v1,0/2] Remove backend xen store entry on domain destroy

Message

Oleksandr Grytsov Oct. 8, 2019, 2:10 p.m. UTC

From: Oleksandr Grytsov <[e-mail]>

We have added VKBD device with user space PV backend. But libxl can't
differentiate domain kind for this device. As result, it performs QEMU procedure
for adding and removing VKB device with user space backend. To fix this issue,
new device kind VINPUT is introduced. It is used as backend kind in case of
user space VKBD backend. 

Another issue addresses in this patch series is error timeout on guest domain
destroy in case using user space PV backends.

We have a driver domain with user space backends (VDISPL, VSND, VKBD). When a
guest domain destroyed, we see following error:

    "timed out while waiting for ... to be removed"

xl expects that PV device backend entries is removed. xl devd removes these
entries for specific devices only: VBD, VIF, QDISK and then deletes the guest
domain from the list. The fix is to delete guest domain only after all devices
are removed and performs generic device remove procedure for following device:
VINPUT, VDISPL, VSND.

Oleksandr Grytsov (2):
  libxl: introduce new backend type VINPUT
  libxl: add removing XS backend path for PV devices on domain destroy

 tools/libxl/libxl_device.c           | 14 +++++---------
 tools/libxl/libxl_types_internal.idl |  1 +
 tools/libxl/libxl_vkb.c              | 29 ++++++++++++++++++----------
 3 files changed, 25 insertions(+), 19 deletions(-)