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[PATCH V6 12/27] vl: helper to request re-exec
From: |
Steve Sistare |
Subject: |
[PATCH V6 12/27] vl: helper to request re-exec |
Date: |
Fri, 6 Aug 2021 14:43:46 -0700 |
Add a qemu_system_exec_request() hook that causes the main loop to exit and
re-exec qemu using the specified arguments.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
include/sysemu/runstate.h | 1 +
softmmu/runstate.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h
index b655c7b..198211b 100644
--- a/include/sysemu/runstate.h
+++ b/include/sysemu/runstate.h
@@ -57,6 +57,7 @@ void qemu_system_wakeup_enable(WakeupReason reason, bool
enabled);
void qemu_register_wakeup_notifier(Notifier *notifier);
void qemu_register_wakeup_support(void);
void qemu_system_shutdown_request(ShutdownCause reason);
+void qemu_system_exec_request(const strList *args);
void qemu_system_powerdown_request(void);
void qemu_register_powerdown_notifier(Notifier *notifier);
void qemu_register_shutdown_notifier(Notifier *notifier);
diff --git a/softmmu/runstate.c b/softmmu/runstate.c
index 3d344c9..309a4bf 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -38,6 +38,7 @@
#include "monitor/monitor.h"
#include "net/net.h"
#include "net/vhost_net.h"
+#include "qapi/util.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-run-state.h"
#include "qapi/qapi-events-run-state.h"
@@ -355,6 +356,7 @@ static NotifierList wakeup_notifiers =
static NotifierList shutdown_notifiers =
NOTIFIER_LIST_INITIALIZER(shutdown_notifiers);
static uint32_t wakeup_reason_mask = ~(1 << QEMU_WAKEUP_REASON_NONE);
+static char **exec_argv;
ShutdownCause qemu_shutdown_requested_get(void)
{
@@ -371,6 +373,11 @@ static int qemu_shutdown_requested(void)
return qatomic_xchg(&shutdown_requested, SHUTDOWN_CAUSE_NONE);
}
+static int qemu_exec_requested(void)
+{
+ return exec_argv != NULL;
+}
+
static void qemu_kill_report(void)
{
if (!qtest_driver() && shutdown_signal) {
@@ -641,6 +648,13 @@ void qemu_system_shutdown_request(ShutdownCause reason)
qemu_notify_event();
}
+void qemu_system_exec_request(const strList *args)
+{
+ exec_argv = strv_from_strList(args);
+ shutdown_requested = 1;
+ qemu_notify_event();
+}
+
static void qemu_system_powerdown(void)
{
qapi_event_send_powerdown();
@@ -689,6 +703,13 @@ static bool main_loop_should_exit(void)
}
request = qemu_shutdown_requested();
if (request) {
+
+ if (qemu_exec_requested()) {
+ execvp(exec_argv[0], exec_argv);
+ error_report("execvp %s failed: %s", exec_argv[0],
strerror(errno));
+ g_strfreev(exec_argv);
+ exec_argv = NULL;
+ }
qemu_kill_report();
qemu_system_shutdown(request);
if (shutdown_action == SHUTDOWN_ACTION_PAUSE) {
--
1.8.3.1
- [PATCH V6 02/27] migration: fix populate_vfio_info, (continued)
- [PATCH V6 02/27] migration: fix populate_vfio_info, Steve Sistare, 2021/08/06
- [PATCH V6 03/27] migration: qemu file wrappers, Steve Sistare, 2021/08/06
- [PATCH V6 04/27] migration: simplify savevm, Steve Sistare, 2021/08/06
- [PATCH V6 05/27] vl: start on wakeup request, Steve Sistare, 2021/08/06
- [PATCH V6 06/27] cpr: reboot mode, Steve Sistare, 2021/08/06
- [PATCH V6 07/27] cpr: reboot HMP interfaces, Steve Sistare, 2021/08/06
- [PATCH V6 08/27] memory: flat section iterator, Steve Sistare, 2021/08/06
- [PATCH V6 09/27] oslib: qemu_clear_cloexec, Steve Sistare, 2021/08/06
- [PATCH V6 10/27] machine: memfd-alloc option, Steve Sistare, 2021/08/06
- [PATCH V6 11/27] qapi: list utility functions, Steve Sistare, 2021/08/06
- [PATCH V6 12/27] vl: helper to request re-exec,
Steve Sistare <=
- [PATCH V6 13/27] cpr: preserve extra state, Steve Sistare, 2021/08/06
- [PATCH V6 14/27] cpr: restart mode, Steve Sistare, 2021/08/06
- [PATCH V6 15/27] cpr: restart HMP interfaces, Steve Sistare, 2021/08/06
- [PATCH V6 16/27] hostmem-memfd: cpr for memory-backend-memfd, Steve Sistare, 2021/08/06
- [PATCH V6 17/27] pci: export functions for cpr, Steve Sistare, 2021/08/06
- [PATCH V6 18/27] vfio-pci: refactor for cpr, Steve Sistare, 2021/08/06
- [PATCH V6 20/27] vfio-pci: cpr part 2 (msi), Steve Sistare, 2021/08/06
- [PATCH V6 19/27] vfio-pci: cpr part 1 (fd and dma), Steve Sistare, 2021/08/06