libdiskfs: Shutdown pagers on startup_dosync.

* libdiskfs/init-startup.c (diskfs_S_startup_dosync): Simplify the
code by just using 'diskfs_shutdown' with the force flag.  This also
shuts down pagers, which potentially affects other tasks, but getting
rid of the pagers allows us to commit a clean and consistent state to
the disk before shutting down.  Crashing other tasks just before the
system powers down seems like a small price to pay.

1 files changed, 1 insertions, 33 deletions

diff --git a/libdiskfs/init-startup.c b/libdiskfs/init-startup.c
index a2e3638d..4251e0b3 100644
--- a/libdiskfs/init-startup.c
+++ b/libdiskfs/init-startup.c
@@ -126,47 +126,15 @@ diskfs_startup_diskfs (mach_port_t bootstrap, int flags)
 error_t
 diskfs_S_startup_dosync (mach_port_t handle)
 {
-  error_t err = 0;
   struct port_info *pi
     = ports_lookup_port (diskfs_port_bucket, handle,
 			 diskfs_shutdown_notification_class);
 
   if (!pi)
     return EOPNOTSUPP;
-
-  if (! diskfs_readonly)
-    {
-      /* First start a sync so that if something goes wrong
-	 we at least get this much done. */
-      diskfs_sync_everything (0);
-      diskfs_set_hypermetadata (0, 0);
-
-      pthread_rwlock_wrlock (&diskfs_fsys_lock);
-
-      /* Permit all the current RPC's to finish, and then suspend new ones */
-      err = ports_inhibit_class_rpcs (diskfs_protid_class);
-      if (! err)
-	{
-	  diskfs_sync_everything (1);
-	  diskfs_set_hypermetadata (1, 1);
-	  _diskfs_diskdirty = 0;
-
-	  /* XXX: if some application writes something after that, we will
-	   * crash. That is still better than creating pending writes before
-	   * poweroff, and thus fsck on next reboot.
-	   */
-	  diskfs_readonly = 1;
-	  diskfs_readonly_changed (1);
-
-	  ports_resume_class_rpcs (diskfs_protid_class);
-	}
-
-      pthread_rwlock_unlock (&diskfs_fsys_lock);
-    }
-
   ports_port_deref (pi);
 
-  return err;
+  return diskfs_shutdown (FSYS_GOAWAY_FORCE || FSYS_GOAWAY_RECURSE);
 }
 
 /* This is called when we have an ordinary environment, complete