qmp: generalize watchdog-set-action to -no-reboot/-no-shutdown

Add a QMP command to allow for the behaviors specified by the
-no-reboot and -no-shutdown command line option to be set at runtime.
The new command is named set-action and takes optional arguments, named
after an event, that provide a corresponding action to take.

Example:

-> { "execute": "set-action",
     "arguments": {
	"reboot": "none",
	"shutdown": "poweroff",
	"watchdog": "debug" } }
<- { "return": {} }

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Message-Id: <1607705564-26264-4-git-send-email-alejandro.j.jimenez@oracle.com>
[Split the series differently, with -action based on the QMP command. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/softmmu/runstate.c b/softmmu/runstate.c
index 892f2f679f..bd0522ed9e 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -54,6 +54,7 @@
 #include "sysemu/replay.h"
 #include "sysemu/reset.h"
 #include "sysemu/runstate.h"
+#include "sysemu/runstate-action.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/tpm.h"
 #include "trace.h"
@@ -471,7 +472,7 @@ void qemu_system_guest_panicked(GuestPanicInformation *info)
     qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE,
                                    !!info, info);
     vm_stop(RUN_STATE_GUEST_PANICKED);
-    if (!no_shutdown) {
+    if (shutdown_action == SHUTDOWN_ACTION_POWEROFF) {
         qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF,
                                        !!info, info);
         qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC);
@@ -512,7 +513,8 @@ void qemu_system_guest_crashloaded(GuestPanicInformation *info)
 
 void qemu_system_reset_request(ShutdownCause reason)
 {
-    if (no_reboot && reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) {
+    if (reboot_action == REBOOT_ACTION_SHUTDOWN &&
+        reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) {
         shutdown_requested = reason;
     } else {
         reset_requested = reason;
@@ -591,7 +593,7 @@ void qemu_system_killed(int signal, pid_t pid)
 {
     shutdown_signal = signal;
     shutdown_pid = pid;
-    no_shutdown = 0;
+    shutdown_action = SHUTDOWN_ACTION_POWEROFF;
 
     /* Cannot call qemu_system_shutdown_request directly because
      * we are in a signal handler.
@@ -658,7 +660,7 @@ static bool main_loop_should_exit(void)
     if (request) {
         qemu_kill_report();
         qemu_system_shutdown(request);
-        if (no_shutdown) {
+        if (shutdown_action == SHUTDOWN_ACTION_PAUSE) {
             vm_stop(RUN_STATE_SHUTDOWN);
         } else {
             return true;