[libvirt] [PATCH v3 1/2] bhyve: drop virProcessKillPainfully() from destroy

[Roman Bogorodskiy]

Currentt implementation of domainDestroy for bhyve calls
virProcessKillPainfully() for the bhyve process and then
executes "bhyvectl --destroy".

This is wrong for two reasons:

 * bhyvectl --destroy alone is sufficient because it terminates
   the process
 * virProcessKillPainfully() first sends SIGTERM and after few
   attempts sends SIGKILL. As SIGTERM triggers ACPI shutdown that
   we're not interested in, it creates an unwatned side effect in
   domainDestroy.

Also, destroy monitor only after "bhyvectl --destroy" command succeeded
to avoid a case when the command fails and domain remains running, but
not being monitored anymore.
---
 src/bhyve/bhyve_process.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/src/bhyve/bhyve_process.c b/src/bhyve/bhyve_process.c
index 14588a9..fe61a9a 100644
--- a/src/bhyve/bhyve_process.c
+++ b/src/bhyve/bhyve_process.c
@@ -278,26 +278,18 @@ virBhyveProcessStop(bhyveConnPtr driver,
         return -1;
     }
 
+    if (!(cmd = virBhyveProcessBuildDestroyCmd(driver, vm->def)))
+        return -1;
+
+    if (virCommandRun(cmd, NULL) < 0)
+        goto cleanup;
+
     if ((priv != NULL) && (priv->mon != NULL))
          bhyveMonitorClose(priv->mon);
 
-    /* First, try to kill 'bhyve' process */
-    if (virProcessKillPainfully(vm->pid, true) != 0)
-        VIR_WARN("Failed to gracefully stop bhyve VM '%s' (pid: %d)",
-                 vm->def->name,
-                 (int)vm->pid);
-
     /* Cleanup network interfaces */
     bhyveNetCleanup(vm);
 
-    /* No matter if shutdown was successful or not, we
-     * need to unload the VM */
-    if (!(cmd = virBhyveProcessBuildDestroyCmd(driver, vm->def)))
-        goto cleanup;
-
-    if (virCommandRun(cmd, NULL) < 0)
-        goto cleanup;
-
     ret = 0;
 
     virCloseCallbacksUnset(driver->closeCallbacks, vm,
-- 
2.7.4