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[libvirt] [PATCH 1/4] Adjust usage of qemu -no-reboot and -no-shutdown options



During building of the qemu command line determine whether to add/use the
'-no-reboot' option only if each of the 'on' events want to to destroy
the domain; otherwise, use the '-no-shutdown' option.

Prior to this change both could be on the command line, which while allowed
could be construed as a conflict.
---
 src/qemu/qemu_command.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 741fa82..9f63781 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -5880,6 +5880,7 @@ qemuBuildCommandLine(virConnectPtr conn,
     int last_good_net = -1;
     bool hasHwVirt = false;
     virCommandPtr cmd = NULL;
+    bool allowReboot = true;
     bool emitBootindex = false;
     int sdl = 0;
     int vnc = 0;
@@ -6262,16 +6263,24 @@ qemuBuildCommandLine(virConnectPtr conn,
         }
     }
 
-    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_NO_REBOOT) &&
-        def->onReboot != VIR_DOMAIN_LIFECYCLE_RESTART)
-        virCommandAddArg(cmd, "-no-reboot");
+    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_NO_REBOOT)) {
+        /* Only add -no-reboot option if each event destroys domain */
+        if (def->onReboot == VIR_DOMAIN_LIFECYCLE_DESTROY &&
+            def->onPoweroff == VIR_DOMAIN_LIFECYCLE_DESTROY &&
+            def->onCrash == VIR_DOMAIN_LIFECYCLE_DESTROY) {
+            allowReboot = false;
+            virCommandAddArg(cmd, "-no-reboot");
+        }
+    }
 
     /* If JSON monitor is enabled, we can receive an event
      * when QEMU stops. If we use no-shutdown, then we can
      * watch for this event and do a soft/warm reboot.
      */
-    if (monitor_json && virQEMUCapsGet(qemuCaps, QEMU_CAPS_NO_SHUTDOWN))
+    if (monitor_json && allowReboot &&
+        virQEMUCapsGet(qemuCaps, QEMU_CAPS_NO_SHUTDOWN)) {
         virCommandAddArg(cmd, "-no-shutdown");
+    }
 
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_NO_ACPI)) {
         if (!(def->features & (1 << VIR_DOMAIN_FEATURE_ACPI)))
-- 
1.8.1.4


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