[Qemu-devel] [PATCH v3 2/3] qerror: Add a new MACHINE_STOPPED error message

[Amit Shah <amit.shah@redhat.com>]

This error message denotes some command was not successful in completing
as the guest was unresponsive.

Use it in the virtio-balloon code when showing older, cached data.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
---
 hw/virtio-balloon.c |    1 +
 qerror.c            |    4 ++++
 qerror.h            |    3 +++
 3 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/hw/virtio-balloon.c b/hw/virtio-balloon.c
index d6c66cf..309c343 100644
--- a/hw/virtio-balloon.c
+++ b/hw/virtio-balloon.c
@@ -140,6 +140,7 @@ static void complete_stats_request(VirtIOBalloon *vb)
 
 static void show_old_stats(void *opaque)
 {
+    qerror_report(QERR_MACHINE_STOPPED);
     complete_stats_request(opaque);
 }
 
diff --git a/qerror.c b/qerror.c
index 0af3ab3..b7a9f7f 100644
--- a/qerror.c
+++ b/qerror.c
@@ -141,6 +141,10 @@ static const QErrorStringTable qerror_table[] = {
         .desc      = "Using KVM without %(capability), %(feature) unavailable",
     },
     {
+        .error_fmt = QERR_MACHINE_STOPPED,
+        .desc      = "The machine is stopped or the guest is taking too long to respond",
+    },
+    {
         .error_fmt = QERR_MIGRATION_EXPECTED,
         .desc      = "An incoming migration is expected before this command can be executed",
     },
diff --git a/qerror.h b/qerror.h
index 62802ea..470577a 100644
--- a/qerror.h
+++ b/qerror.h
@@ -121,6 +121,9 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_KVM_MISSING_CAP \
     "{ 'class': 'KVMMissingCap', 'data': { 'capability': %s, 'feature': %s } }"
 
+#define QERR_MACHINE_STOPPED \
+    "{ 'class': 'MachineStopped', 'data': {} }"
+
 #define QERR_MIGRATION_EXPECTED \
     "{ 'class': 'MigrationExpected', 'data': {} }"
 
-- 
1.7.2.2