migration: export migration_is_setup_or_active

Delete the MigrationState parameter from migration_is_setup_or_active
and move it to the public API in misc.h.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/1710179338-294359-3-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>

hw/vfio/common.c

@@ -152,7 +152,7 @@ static void vfio_set_migration_error(int err)
 {
     MigrationState *ms = migrate_get_current();
 
-    if (migration_is_setup_or_active(ms->state)) {
+    if (migration_is_setup_or_active()) {
         WITH_QEMU_LOCK_GUARD(&ms->qemu_file_lock) {
             if (ms->to_dst_file) {
                 qemu_file_set_error(ms->to_dst_file, err);

include/migration/misc.h

@@ -61,6 +61,7 @@ void migration_object_init(void);
 void migration_shutdown(void);
 bool migration_is_idle(void);
 bool migration_is_active(MigrationState *);
+bool migration_is_setup_or_active(void);
 bool migrate_mode_is_cpr(MigrationState *);
 
 typedef enum MigrationEventType {

migration/migration.c

@@ -1081,9 +1081,11 @@ void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value)
  * Return true if we're already in the middle of a migration
  * (i.e. any of the active or setup states)
  */
-bool migration_is_setup_or_active(int state)
+bool migration_is_setup_or_active(void)
 {
-    switch (state) {
+    MigrationState *s = current_migration;
+
+    switch (s->state) {
     case MIGRATION_STATUS_ACTIVE:
     case MIGRATION_STATUS_POSTCOPY_ACTIVE:
     case MIGRATION_STATUS_POSTCOPY_PAUSED:
@@ -1601,10 +1603,8 @@ bool migration_incoming_postcopy_advised(void)
 
 bool migration_in_bg_snapshot(void)
 {
-    MigrationState *s = migrate_get_current();
-
     return migrate_background_snapshot() &&
-            migration_is_setup_or_active(s->state);
+           migration_is_setup_or_active();
 }
 
 bool migration_is_idle(void)
@@ -2297,7 +2297,7 @@ static void *source_return_path_thread(void *opaque)
     trace_source_return_path_thread_entry();
     rcu_register_thread();
 
-    while (migration_is_setup_or_active(ms->state)) {
+    while (migration_is_setup_or_active()) {
         trace_source_return_path_thread_loop_top();
 
         header_type = qemu_get_be16(rp);

migration/migration.h

@@ -479,7 +479,6 @@ bool migrate_has_error(MigrationState *s);
 
 void migrate_fd_connect(MigrationState *s, Error *error_in);
 
-bool migration_is_setup_or_active(int state);
 bool migration_is_running(int state);
 
 int migrate_init(MigrationState *s, Error **errp);

migration/ram.c

@@ -2909,10 +2909,9 @@ void qemu_guest_free_page_hint(void *addr, size_t len)
     RAMBlock *block;
     ram_addr_t offset;
     size_t used_len, start, npages;
-    MigrationState *s = migrate_get_current();
 
     /* This function is currently expected to be used during live migration */
-    if (!migration_is_setup_or_active(s->state)) {
+    if (!migration_is_setup_or_active()) {
         return;
     }
 
@@ -3263,7 +3262,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
 
 out:
     if (ret >= 0
-        && migration_is_setup_or_active(migrate_get_current()->state)) {
+        && migration_is_setup_or_active()) {
         if (migrate_multifd() && migrate_multifd_flush_after_each_section() &&
             !migrate_mapped_ram()) {
             ret = multifd_send_sync_main();

net/vhost-vdpa.c

@@ -26,7 +26,6 @@
 #include <err.h>
 #include "standard-headers/linux/virtio_net.h"
 #include "monitor/monitor.h"
-#include "migration/migration.h"
 #include "migration/misc.h"
 #include "hw/virtio/vhost.h"
 
@@ -355,7 +354,7 @@ static int vhost_vdpa_net_data_start(NetClientState *nc)
     assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
 
     if (s->always_svq ||
-        migration_is_setup_or_active(migrate_get_current()->state)) {
+        migration_is_setup_or_active()) {
         v->shadow_vqs_enabled = true;
     } else {
         v->shadow_vqs_enabled = false;