migration/multifd: Move multifd_send_setup error handling in to the f…

…unction

Hide the error handling inside multifd_send_setup to make it cleaner
for the next patch to move the function around.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240206215118.6171-4-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>

migration/migration.c

@@ -3635,11 +3635,7 @@ void migrate_fd_connect(MigrationState *s, Error *error_in)
         return;
     }
 
-    if (multifd_send_setup(&local_err) != 0) {
-        migrate_set_error(s, local_err);
-        error_report_err(local_err);
-        migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
-                          MIGRATION_STATUS_FAILED);
+    if (!multifd_send_setup()) {
         migrate_fd_cleanup(s);
         return;
     }

migration/multifd.c

@@ -985,14 +985,16 @@ static void multifd_new_send_channel_create(gpointer opaque)
     socket_send_channel_create(multifd_new_send_channel_async, opaque);
 }
 
-int multifd_send_setup(Error **errp)
+bool multifd_send_setup(void)
 {
-    int thread_count;
+    MigrationState *s = migrate_get_current();
+    Error *local_err = NULL;
+    int thread_count, ret = 0;
     uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
     uint8_t i;
 
     if (!migrate_multifd()) {
-        return 0;
+        return true;
     }
 
     thread_count = migrate_multifd_channels();
@@ -1026,14 +1028,22 @@ int multifd_send_setup(Error **errp)
 
     for (i = 0; i < thread_count; i++) {
         MultiFDSendParams *p = &multifd_send_state->params[i];
-        int ret;
 
-        ret = multifd_send_state->ops->send_setup(p, errp);
+        ret = multifd_send_state->ops->send_setup(p, &local_err);
         if (ret) {
-            return ret;
+            break;
         }
     }
-    return 0;
+
+    if (ret) {
+        migrate_set_error(s, local_err);
+        error_report_err(local_err);
+        migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
+                          MIGRATION_STATUS_FAILED);
+        return false;
+    }
+
+    return true;
 }
 
 struct {

migration/multifd.h

@@ -13,7 +13,7 @@
 #ifndef QEMU_MIGRATION_MULTIFD_H
 #define QEMU_MIGRATION_MULTIFD_H
 
-int multifd_send_setup(Error **errp);
+bool multifd_send_setup(void);
 void multifd_send_shutdown(void);
 int multifd_recv_setup(Error **errp);
 void multifd_recv_cleanup(void);