qemu-file: Account for rate_limit usage on qemu_fflush()

That is the moment we know we have transferred something.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20230515195709.63843-5-quintela@redhat.com>

migration/qemu-file.c

@@ -302,7 +302,9 @@ void qemu_fflush(QEMUFile *f)
                                    &local_error) < 0) {
             qemu_file_set_error_obj(f, -EIO, local_error);
         } else {
-            f->total_transferred += iov_size(f->iov, f->iovcnt);
+            uint64_t size = iov_size(f->iov, f->iovcnt);
+            qemu_file_acct_rate_limit(f, size);
+            f->total_transferred += size;
         }
 
         qemu_iovec_release_ram(f);
@@ -519,7 +521,6 @@ void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size,
         return;
     }
 
-    f->rate_limit_used += size;
     add_to_iovec(f, buf, size, may_free);
 }
 
@@ -537,7 +538,6 @@ void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, size_t size)
             l = size;
         }
         memcpy(f->buf + f->buf_index, buf, l);
-        f->rate_limit_used += l;
         add_buf_to_iovec(f, l);
         if (qemu_file_get_error(f)) {
             break;
@@ -554,7 +554,6 @@ void qemu_put_byte(QEMUFile *f, int v)
     }
 
     f->buf[f->buf_index] = v;
-    f->rate_limit_used++;
     add_buf_to_iovec(f, 1);
 }