automount: don't cancel mount/umount request on reload/reexec (system…

…d#3670)

All pending tokens are already serialized correctly and will be handled
when the mount unit is done.

Without this a 'daemon-reload' cancels all pending tokens. Any process
waiting for the mount will continue with EHOSTDOWN.
This can happen when the mount unit waits for it's dependencies, e.g.
network, devices, fsck, etc.

src/core/automount.c

@@ -98,9 +98,6 @@ static void unmount_autofs(Automount *a) {
         if (a->pipe_fd < 0)
                 return;
 
-        automount_send_ready(a, a->tokens, -EHOSTDOWN);
-        automount_send_ready(a, a->expire_tokens, -EHOSTDOWN);
-
         a->pipe_event_source = sd_event_source_unref(a->pipe_event_source);
         a->pipe_fd = safe_close(a->pipe_fd);
 
@@ -109,6 +106,9 @@ static void unmount_autofs(Automount *a) {
         if (a->where &&
             (UNIT(a)->manager->exit_code != MANAGER_RELOAD &&
              UNIT(a)->manager->exit_code != MANAGER_REEXECUTE)) {
+                automount_send_ready(a, a->tokens, -EHOSTDOWN);
+                automount_send_ready(a, a->expire_tokens, -EHOSTDOWN);
+
                 r = repeat_unmount(a->where, MNT_DETACH);
                 if (r < 0)
                         log_error_errno(r, "Failed to unmount: %m");