runstate_set(): Check for valid transitions

This commit could have been folded with the previous one, however
doing it separately will allow for easy bisect and revert if needed.

Checking and testing all valid transitions wasn't trivial, chances
are this will need broader testing to become more stable.

This is a transition table as suggested by Lluís Vilanova.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/sysemu.h b/sysemu.h
index 19088aa2dd..a01ddac564 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -36,6 +36,7 @@ extern uint8_t qemu_uuid[];
 int qemu_uuid_parse(const char *str, uint8_t *uuid);
 #define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
 
+void runstate_init(void);
 bool runstate_check(RunState state);
 void runstate_set(RunState new_state);
 typedef struct vm_change_state_entry VMChangeStateEntry;