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[PATCH V5 08/25] vl: add helper to request re-exec
From: |
Steve Sistare |
Subject: |
[PATCH V5 08/25] vl: add helper to request re-exec |
Date: |
Wed, 7 Jul 2021 10:20:17 -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 | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+)
diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h
index ed4b735..e1ae7e5 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(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 7fe4967..8474a01 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -355,6 +355,7 @@ 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 +372,11 @@ 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) {
@@ -645,6 +651,32 @@ void qemu_system_shutdown_request(ShutdownCause reason)
qemu_notify_event();
}
+static char **make_argv(strList *args)
+{
+ strList *arg;
+ char **argv;
+ int n = 1, i = 0;
+
+ for (arg = args; arg != NULL; arg = arg->next) {
+ n++;
+ }
+
+ argv = g_malloc(n * sizeof(char *));
+ for (arg = args; arg != NULL; arg = arg->next) {
+ argv[i++] = g_strdup(arg->value);
+ }
+ argv[i] = NULL;
+
+ return argv;
+}
+
+void qemu_system_exec_request(strList *args)
+{
+ exec_argv = make_argv(args);
+ shutdown_requested = 1;
+ qemu_notify_event();
+}
+
static void qemu_system_powerdown(void)
{
qapi_event_send_powerdown();
@@ -693,6 +725,11 @@ static bool main_loop_should_exit(void)
}
request = qemu_shutdown_requested();
if (request) {
+
+ if (qemu_exec_requested()) {
+ execvp(exec_argv[0], exec_argv);
+ error_setg_errno(&error_fatal, errno, "execvp failed");
+ }
qemu_kill_report();
qemu_system_shutdown(request);
if (shutdown_action == SHUTDOWN_ACTION_PAUSE) {
--
1.8.3.1
- [PATCH V5 18/25] vhost: reset vhost devices upon cprsave, (continued)
- [PATCH V5 18/25] vhost: reset vhost devices upon cprsave, Steve Sistare, 2021/07/07
- [PATCH V5 24/25] cpr: only-cpr-capable option, Steve Sistare, 2021/07/07
- [PATCH V5 22/25] chardev: cpr for pty, Steve Sistare, 2021/07/07
- [PATCH V5 21/25] chardev: cpr for simple devices, Steve Sistare, 2021/07/07
- [PATCH V5 23/25] chardev: cpr for sockets, Steve Sistare, 2021/07/07
- [PATCH V5 25/25] simplify savevm, Steve Sistare, 2021/07/07
- [PATCH V5 02/25] cpr: reboot mode, Steve Sistare, 2021/07/07
- [PATCH V5 08/25] vl: add helper to request re-exec,
Steve Sistare <=