runstate: Add runstate store

This allows us to store the current state to send it through migration.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index df809518b42dae61c1b2b027b5b22091ae859b38..44570d17e6c138683b9c9a1365c63a4da619c270 100644 (file)
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -28,6 +28,7 @@ bool runstate_check(RunState state);
 void runstate_set(RunState new_state);
 int runstate_is_running(void);
 bool runstate_needs_reset(void);
+bool runstate_store(char *str, size_t size);
 typedef struct vm_change_state_entry VMChangeStateEntry;
 typedef void VMChangeStateHandler(void *opaque, int running, RunState state);
 

diff --git a/vl.c b/vl.c
index 69ad90c87f7fd7f0c7be21305b04700040817c4a..fec7e930d415dfeed808bf1bbaccae1022f3aa74 100644 (file)
--- a/vl.c
+++ b/vl.c
@@ -634,6 +634,18 @@ bool runstate_check(RunState state)
     return current_run_state == state;
 }
 
+bool runstate_store(char *str, size_t size)
+{
+    const char *state = RunState_lookup[current_run_state];
+    size_t len = strlen(state) + 1;
+
+    if (len > size) {
+        return false;
+    }
+    memcpy(str, state, len);
+    return true;
+}
+
 static void runstate_init(void)
 {
     const RunStateTransition *p;