When killing QEMU or remote client is terminated normally,
we can release current controller related data structure,
users may restart QEMU to connect the same socket file
again, for the new connection, vfio-user will create
a new controller data structure for it.
Here we add a lock in the endpoint data structure to protect
number of connected queue pairs variable, because controller
data structure is like a session, while endpoint is related
with the socket file, so it's safe here. Moreover, we can
use this lock to protect live migration related data
structures in future.
Change-Id: Ie7060041a253604e7a2242813ec284eae46fe4e8
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6862
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: <dongx.yi@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
43b63c68b9