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authorAnthony Liguori <aliguori@us.ibm.com>2011-09-20 15:16:00 -0500
committerAnthony Liguori <aliguori@us.ibm.com>2011-09-20 15:16:00 -0500
commit7f67d8922e2da59c02852de39f888d7873e8645c (patch)
treefde41774a54f63bce66a739332c3dbd27365af91 /vl.c
parent27acf660aa1678ff3e7291fa81f4d5d4020b20f8 (diff)
parent6e0ca8820dddd04056c43327f3b3699f572d03d4 (diff)
Merge remote-tracking branch 'qmp/queue/qmp' into staging
Diffstat (limited to 'vl.c')
-rw-r--r--vl.c156
1 files changed, 138 insertions, 18 deletions
diff --git a/vl.c b/vl.c
index 0c2fc3fb3d..bd4a5ce8a2 100644
--- a/vl.c
+++ b/vl.c
@@ -185,9 +185,7 @@ int mem_prealloc = 0; /* force preallocation of physical target memory */
#endif
int nb_nics;
NICInfo nd_table[MAX_NICS];
-int vm_running;
int autostart;
-int incoming_expected; /* Started with -incoming and waiting for incoming */
static int rtc_utc = 1;
static int rtc_date_offset = -1; /* -1 means no change */
QEMUClock *rtc_clock;
@@ -323,6 +321,120 @@ static int default_driver_check(QemuOpts *opts, void *opaque)
}
/***********************************************************/
+/* QEMU state */
+
+static RunState current_run_state = RSTATE_NO_STATE;
+
+typedef struct {
+ RunState from;
+ RunState to;
+} RunStateTransition;
+
+static const RunStateTransition runstate_transitions_def[] = {
+ /* from -> to */
+ { RSTATE_NO_STATE, RSTATE_RUNNING },
+ { RSTATE_NO_STATE, RSTATE_IN_MIGRATE },
+ { RSTATE_NO_STATE, RSTATE_PRE_LAUNCH },
+
+ { RSTATE_DEBUG, RSTATE_RUNNING },
+
+ { RSTATE_IN_MIGRATE, RSTATE_RUNNING },
+ { RSTATE_IN_MIGRATE, RSTATE_PRE_LAUNCH },
+
+ { RSTATE_PANICKED, RSTATE_PAUSED },
+
+ { RSTATE_IO_ERROR, RSTATE_RUNNING },
+
+ { RSTATE_PAUSED, RSTATE_RUNNING },
+
+ { RSTATE_POST_MIGRATE, RSTATE_RUNNING },
+
+ { RSTATE_PRE_LAUNCH, RSTATE_RUNNING },
+ { RSTATE_PRE_LAUNCH, RSTATE_POST_MIGRATE },
+
+ { RSTATE_PRE_MIGRATE, RSTATE_RUNNING },
+ { RSTATE_PRE_MIGRATE, RSTATE_POST_MIGRATE },
+
+ { RSTATE_RESTORE, RSTATE_RUNNING },
+
+ { RSTATE_RUNNING, RSTATE_DEBUG },
+ { RSTATE_RUNNING, RSTATE_PANICKED },
+ { RSTATE_RUNNING, RSTATE_IO_ERROR },
+ { RSTATE_RUNNING, RSTATE_PAUSED },
+ { RSTATE_RUNNING, RSTATE_PRE_MIGRATE },
+ { RSTATE_RUNNING, RSTATE_RESTORE },
+ { RSTATE_RUNNING, RSTATE_SAVEVM },
+ { RSTATE_RUNNING, RSTATE_SHUTDOWN },
+ { RSTATE_RUNNING, RSTATE_WATCHDOG },
+
+ { RSTATE_SAVEVM, RSTATE_RUNNING },
+
+ { RSTATE_SHUTDOWN, RSTATE_PAUSED },
+
+ { RSTATE_WATCHDOG, RSTATE_RUNNING },
+
+ { RSTATE_MAX, RSTATE_MAX },
+};
+
+static bool runstate_valid_transitions[RSTATE_MAX][RSTATE_MAX];
+
+static const char *const runstate_name_tbl[RSTATE_MAX] = {
+ [RSTATE_DEBUG] = "debug",
+ [RSTATE_IN_MIGRATE] = "incoming-migration",
+ [RSTATE_PANICKED] = "internal-error",
+ [RSTATE_IO_ERROR] = "io-error",
+ [RSTATE_PAUSED] = "paused",
+ [RSTATE_POST_MIGRATE] = "post-migrate",
+ [RSTATE_PRE_LAUNCH] = "prelaunch",
+ [RSTATE_PRE_MIGRATE] = "finish-migrate",
+ [RSTATE_RESTORE] = "restore-vm",
+ [RSTATE_RUNNING] = "running",
+ [RSTATE_SAVEVM] = "save-vm",
+ [RSTATE_SHUTDOWN] = "shutdown",
+ [RSTATE_WATCHDOG] = "watchdog",
+};
+
+bool runstate_check(RunState state)
+{
+ return current_run_state == state;
+}
+
+void runstate_init(void)
+{
+ const RunStateTransition *p;
+
+ memset(&runstate_valid_transitions, 0, sizeof(runstate_valid_transitions));
+
+ for (p = &runstate_transitions_def[0]; p->from != RSTATE_MAX; p++) {
+ runstate_valid_transitions[p->from][p->to] = true;
+ }
+}
+
+/* This function will abort() on invalid state transitions */
+void runstate_set(RunState new_state)
+{
+ if (new_state >= RSTATE_MAX ||
+ !runstate_valid_transitions[current_run_state][new_state]) {
+ fprintf(stderr, "invalid runstate transition\n");
+ abort();
+ }
+
+ current_run_state = new_state;
+}
+
+const char *runstate_as_string(void)
+{
+ assert(current_run_state > RSTATE_NO_STATE &&
+ current_run_state < RSTATE_MAX);
+ return runstate_name_tbl[current_run_state];
+}
+
+int runstate_is_running(void)
+{
+ return runstate_check(RSTATE_RUNNING);
+}
+
+/***********************************************************/
/* real time host monotonic timer */
/***********************************************************/
@@ -1145,23 +1257,23 @@ void qemu_del_vm_change_state_handler(VMChangeStateEntry *e)
g_free (e);
}
-void vm_state_notify(int running, int reason)
+void vm_state_notify(int running, RunState state)
{
VMChangeStateEntry *e;
- trace_vm_state_notify(running, reason);
+ trace_vm_state_notify(running, state);
for (e = vm_change_state_head.lh_first; e; e = e->entries.le_next) {
- e->cb(e->opaque, running, reason);
+ e->cb(e->opaque, running, state);
}
}
void vm_start(void)
{
- if (!vm_running) {
+ if (!runstate_is_running()) {
cpu_enable_ticks();
- vm_running = 1;
- vm_state_notify(1, 0);
+ runstate_set(RSTATE_RUNNING);
+ vm_state_notify(1, RSTATE_RUNNING);
resume_all_vcpus();
monitor_protocol_event(QEVENT_RESUME, NULL);
}
@@ -1182,7 +1294,7 @@ static int shutdown_requested, shutdown_signal = -1;
static pid_t shutdown_pid;
static int powerdown_requested;
static int debug_requested;
-static int vmstop_requested;
+static RunState vmstop_requested = RSTATE_NO_STATE;
int qemu_shutdown_requested_get(void)
{
@@ -1238,11 +1350,11 @@ static int qemu_debug_requested(void)
return r;
}
-static int qemu_vmstop_requested(void)
+static RunState qemu_vmstop_requested(void)
{
- int r = vmstop_requested;
- vmstop_requested = 0;
- return r;
+ RunState s = vmstop_requested;
+ vmstop_requested = RSTATE_NO_STATE;
+ return s;
}
void qemu_register_reset(QEMUResetHandler *func, void *opaque)
@@ -1318,9 +1430,9 @@ void qemu_system_debug_request(void)
qemu_notify_event();
}
-void qemu_system_vmstop_request(int reason)
+void qemu_system_vmstop_request(RunState state)
{
- vmstop_requested = reason;
+ vmstop_requested = state;
qemu_notify_event();
}
@@ -1470,13 +1582,13 @@ static void main_loop(void)
#endif
if (qemu_debug_requested()) {
- vm_stop(VMSTOP_DEBUG);
+ vm_stop(RSTATE_DEBUG);
}
if (qemu_shutdown_requested()) {
qemu_kill_report();
monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
if (no_shutdown) {
- vm_stop(VMSTOP_SHUTDOWN);
+ vm_stop(RSTATE_SHUTDOWN);
} else
break;
}
@@ -1485,6 +1597,10 @@ static void main_loop(void)
cpu_synchronize_all_states();
qemu_system_reset(VMRESET_REPORT);
resume_all_vcpus();
+ if (runstate_check(RSTATE_PANICKED) ||
+ runstate_check(RSTATE_SHUTDOWN)) {
+ runstate_set(RSTATE_PAUSED);
+ }
}
if (qemu_powerdown_requested()) {
monitor_protocol_event(QEVENT_POWERDOWN, NULL);
@@ -2203,6 +2319,8 @@ int main(int argc, char **argv, char **envp)
g_mem_set_vtable(&mem_trace);
g_thread_init(NULL);
+ runstate_init();
+
init_clocks();
qemu_cache_utils_init(envp);
@@ -2953,7 +3071,6 @@ int main(int argc, char **argv, char **envp)
break;
case QEMU_OPTION_incoming:
incoming = optarg;
- incoming_expected = true;
break;
case QEMU_OPTION_nodefaults:
default_serial = 0;
@@ -3439,6 +3556,7 @@ int main(int argc, char **argv, char **envp)
}
if (incoming) {
+ runstate_set(RSTATE_IN_MIGRATE);
int ret = qemu_start_incoming_migration(incoming);
if (ret < 0) {
fprintf(stderr, "Migration failed. Exit code %s(%d), exiting.\n",
@@ -3447,6 +3565,8 @@ int main(int argc, char **argv, char **envp)
}
} else if (autostart) {
vm_start();
+ } else {
+ runstate_set(RSTATE_PRE_LAUNCH);
}
os_setup_post();