[libvirt] [PATCH] libvirt: add daemon itself as shutdown reason

[Nikolay Shirokovskiy]

Let's introduce shutdown reason "daemon" which means we have to
kill running domain ourselves as the best action we can take at
that moment. Failure to pick up domain on daemon restart is
one example of such case. Using reason "crashed" is a bit misleading
as it is used when qemu is actually crashed or qemu destroyed on
guest panic as result of user choice that is the problem was
in qemu/guest itself. So I propose to use "crashed" only for
qemu side issues and introduce "daemon" when we have to kill the qemu
for good.

There is another example where "daemon" will be useful. If we can
not reboot domain we kill it and got "crashed" reason now. Looks
like good candidate for "daemon" reason.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
---
 include/libvirt/libvirt-domain.h |  1 +
 src/conf/domain_conf.c           |  3 ++-
 src/qemu/qemu_process.c          | 11 ++++-------
 tools/virsh-domain-monitor.c     |  3 ++-
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h
index fdd2d6b..11fdab5 100644
--- a/include/libvirt/libvirt-domain.h
+++ b/include/libvirt/libvirt-domain.h
@@ -145,6 +145,7 @@ typedef enum {
     VIR_DOMAIN_SHUTOFF_FAILED = 6,      /* domain failed to start */
     VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT = 7, /* restored from a snapshot which was
                                            * taken while domain was shutoff */
+    VIR_DOMAIN_SHUTOFF_DAEMON = 8,      /* daemon have to kill domain */
 # ifdef VIR_ENUM_SENTINELS
     VIR_DOMAIN_SHUTOFF_LAST
 # endif
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 9911d56..e441723 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -779,7 +779,8 @@ VIR_ENUM_IMPL(virDomainShutoffReason, VIR_DOMAIN_SHUTOFF_LAST,
               "migrated",
               "saved",
               "failed",
-              "from snapshot")
+              "from snapshot",
+              "daemon")
 
 VIR_ENUM_IMPL(virDomainCrashedReason, VIR_DOMAIN_CRASHED_LAST,
               "unknown",
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index e9c7618..c4bc9ca 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -7988,15 +7988,12 @@ qemuProcessReconnect(void *opaque)
         /* We can't get the monitor back, so must kill the VM
          * to remove danger of it ending up running twice if
          * user tries to start it again later
-         * If we couldn't get the monitor since QEMU supports
-         * no-shutdown, we can safely say that the domain
-         * crashed ... */
-        state = VIR_DOMAIN_SHUTOFF_CRASHED;
-        /* If BeginJob failed, we jumped here without a job, let's hope another
+         * If BeginJob failed, we jumped here without a job, let's hope another
          * thread didn't have a chance to start playing with the domain yet
          * (it's all we can do anyway).
          */
-        qemuProcessStop(driver, obj, state, QEMU_ASYNC_JOB_NONE, stopFlags);
+        qemuProcessStop(driver, obj, VIR_DOMAIN_SHUTOFF_DAEMON,
+                        QEMU_ASYNC_JOB_NONE, stopFlags);
     }
     goto cleanup;
 }
@@ -8035,7 +8032,7 @@ qemuProcessReconnectHelper(virDomainObjPtr obj,
          * is no thread that could be doing anything else with the same domain
          * object.
          */
-        qemuProcessStop(src->driver, obj, VIR_DOMAIN_SHUTOFF_FAILED,
+        qemuProcessStop(src->driver, obj, VIR_DOMAIN_SHUTOFF_DAEMON,
                         QEMU_ASYNC_JOB_NONE, 0);
         qemuDomainRemoveInactiveJobLocked(src->driver, obj);
 
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index 3a26363..f0ad558 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -212,7 +212,8 @@ VIR_ENUM_IMPL(virshDomainShutoffReason,
               N_("migrated"),
               N_("saved"),
               N_("failed"),
-              N_("from snapshot"))
+              N_("from snapshot"),
+              N_("daemon"))
 
 VIR_ENUM_DECL(virshDomainCrashedReason)
 VIR_ENUM_IMPL(virshDomainCrashedReason,
-- 
1.8.3.1