qemu: taint domain if virDomainQemuAgentCommand API is used

This is similar to the virDomainQemuMonitorCommand API, it can change
the domain state in a way that libvirt may not understand.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

src/conf/domain_conf.c

@@ -100,7 +100,8 @@ VIR_ENUM_IMPL(virDomainTaint, VIR_DOMAIN_TAINT_LAST,
               "host-cpu",
               "hook-script",
               "cdrom-passthrough",
-              "custom-dtb");
+              "custom-dtb",
+              "custom-ga-command");
 
 VIR_ENUM_IMPL(virDomainVirt, VIR_DOMAIN_VIRT_LAST,
               "none",

src/conf/domain_conf.h

@@ -2456,6 +2456,7 @@ typedef enum {
     VIR_DOMAIN_TAINT_HOOK,             /* Domain (possibly) changed via hook script */
     VIR_DOMAIN_TAINT_CDROM_PASSTHROUGH,/* CDROM passthrough */
     VIR_DOMAIN_TAINT_CUSTOM_DTB,       /* Custom device tree blob was specified */
+    VIR_DOMAIN_TAINT_CUSTOM_GA_COMMAND, /* Custom guest agent command */
 
     VIR_DOMAIN_TAINT_LAST
 } virDomainTaintFlags;

src/qemu/qemu_driver.c

@@ -18737,6 +18737,8 @@ qemuDomainQemuAgentCommand(virDomainPtr domain,
     if (!qemuDomainAgentAvailable(vm, true))
         goto endjob;
 
+    qemuDomainObjTaint(driver, vm, VIR_DOMAIN_TAINT_CUSTOM_GA_COMMAND, NULL);
+
     agent = qemuDomainObjEnterAgent(vm);
     ret = qemuAgentArbitraryCommand(agent, cmd, &result, timeout);
     qemuDomainObjExitAgent(vm, agent);