migration: export migration_is_active

Delete the MigrationState parameter from migration_is_active so it
can be exported and used without including migration.h.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-4-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>

hw/vfio/common.c

@@ -182,7 +182,7 @@ static bool vfio_devices_all_dirty_tracking(VFIOContainerBase *bcontainer)
     VFIODevice *vbasedev;
     MigrationState *ms = migrate_get_current();
 
-    if (ms->state != MIGRATION_STATUS_ACTIVE &&
+    if (!migration_is_active() &&
         ms->state != MIGRATION_STATUS_DEVICE) {
         return false;
     }
@@ -225,7 +225,7 @@ vfio_devices_all_running_and_mig_active(const VFIOContainerBase *bcontainer)
 {
     VFIODevice *vbasedev;
 
-    if (!migration_is_active(migrate_get_current())) {
+    if (!migration_is_active()) {
         return false;
     }
 

include/migration/misc.h

@@ -60,7 +60,7 @@ void dump_vmstate_json_to_file(FILE *out_fp);
 void migration_object_init(void);
 void migration_shutdown(void);
 bool migration_is_idle(void);
-bool migration_is_active(MigrationState *);
+bool migration_is_active(void);
 bool migration_is_setup_or_active(void);
 bool migrate_mode_is_cpr(MigrationState *);
 

migration/migration.c

@@ -1406,7 +1406,7 @@ static void migrate_fd_cleanup(MigrationState *s)
         qemu_fclose(tmp);
     }
 
-    assert(!migration_is_active(s));
+    assert(!migration_is_active());
 
     if (s->state == MIGRATION_STATUS_CANCELLING) {
         migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING,
@@ -1637,8 +1637,10 @@ bool migration_is_idle(void)
     return false;
 }
 
-bool migration_is_active(MigrationState *s)
+bool migration_is_active(void)
 {
+    MigrationState *s = current_migration;
+
     return (s->state == MIGRATION_STATUS_ACTIVE ||
             s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE);
 }
@@ -3461,7 +3463,7 @@ static void *migration_thread(void *opaque)
 
     trace_migration_thread_setup_complete();
 
-    while (migration_is_active(s)) {
+    while (migration_is_active()) {
         if (urgent || !migration_rate_exceeded(s->to_dst_file)) {
             MigIterateState iter_state = migration_iteration_run(s);
             if (iter_state == MIG_ITERATE_SKIP) {
@@ -3607,7 +3609,7 @@ static void *bg_migration_thread(void *opaque)
     migration_bh_schedule(bg_migration_vm_start_bh, s);
     bql_unlock();
 
-    while (migration_is_active(s)) {
+    while (migration_is_active()) {
         MigIterateState iter_state = bg_migration_iteration_run(s);
         if (iter_state == MIG_ITERATE_SKIP) {
             continue;

system/dirtylimit.c

@@ -83,7 +83,7 @@ static void vcpu_dirty_rate_stat_collect(void)
     int64_t period = DIRTYLIMIT_CALC_TIME_MS;
 
     if (migrate_dirty_limit() &&
-        migration_is_active(s)) {
+        migration_is_active()) {
         period = s->parameters.x_vcpu_dirty_limit_period;
     }