From deb8789da55b84c99df417f3cd07db52cac8f89b Mon Sep 17 00:00:00 2001
Message-Id: <deb8789da55b84c99df417f3cd07db52cac8f89b@dist-git>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Wed, 11 Jul 2018 17:27:28 +0200
Subject: [PATCH] qemu: Fetch pr-helper process info on reconnect
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https://bugzilla.redhat.com/show_bug.cgi?id=1470007

If qemu-pr-helper process died while libvirtd was not running no
event is emitted. Therefore, when reconnecting to the monitor we
must check the qemu-pr-helper process status and act accordingly.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit ab435a4be4673a9a38e0315864b9cf4f9bee03e7)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
 src/qemu/qemu_process.c | 60 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index fbc8529f3b..c903a8e5c8 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2071,6 +2071,63 @@ qemuRefreshVirtioChannelState(virQEMUDriverPtr driver,
     return ret;
 }
 
+
+static int
+qemuProcessRefreshPRManagerState(virDomainObjPtr vm,
+                                 virHashTablePtr info)
+{
+    qemuDomainObjPrivatePtr priv = vm->privateData;
+    qemuMonitorPRManagerInfoPtr prManagerInfo;
+    const char *managedAlias = qemuDomainGetManagedPRAlias();
+    int ret = -1;
+
+    if (!(prManagerInfo = virHashLookup(info, managedAlias))) {
+        virReportError(VIR_ERR_OPERATION_FAILED,
+                       _("missing info on pr-manager %s"),
+                       managedAlias);
+        goto cleanup;
+    }
+
+    priv->prDaemonRunning = prManagerInfo->connected;
+
+    if (!priv->prDaemonRunning &&
+        qemuProcessStartManagedPRDaemon(vm) < 0)
+        goto cleanup;
+
+    ret = 0;
+ cleanup:
+    return ret;
+}
+
+
+static int
+qemuRefreshPRManagerState(virQEMUDriverPtr driver,
+                          virDomainObjPtr vm)
+{
+    qemuDomainObjPrivatePtr priv = vm->privateData;
+    virHashTablePtr info = NULL;
+    int ret = -1;
+
+    if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_PR_MANAGER_HELPER) ||
+        !virDomainDefHasManagedPR(vm->def))
+        return 0;
+
+    qemuDomainObjEnterMonitor(driver, vm);
+    ret = qemuMonitorGetPRManagerInfo(priv->mon, &info);
+    if (qemuDomainObjExitMonitor(driver, vm) < 0)
+        ret = -1;
+
+    if (ret < 0)
+        goto cleanup;
+
+    ret = qemuProcessRefreshPRManagerState(vm, info);
+
+ cleanup:
+    virHashFree(info);
+    return ret;
+}
+
+
 static void
 qemuRefreshRTC(virQEMUDriverPtr driver,
                virDomainObjPtr vm)
@@ -7736,6 +7793,9 @@ qemuProcessReconnect(void *opaque)
     if (qemuProcessUpdateDevices(driver, obj) < 0)
         goto error;
 
+    if (qemuRefreshPRManagerState(driver, obj) < 0)
+        goto error;
+
     qemuProcessReconnectCheckMemAliasOrderMismatch(obj);
 
     if (qemuConnectAgent(driver, obj) < 0)
-- 
2.18.0