1 files changed, 85 insertions, 0 deletions
diff --git a/ufs/pokeloc.c b/ufs/pokeloc.c
new file mode 100644
index 00000000..267aa106
--- /dev/null
+++ b/ufs/pokeloc.c
@@ -0,0 +1,85 @@
+/* Remember where we've written the disk to speed up sync
+   Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ufs.h"
+
+struct pokeloc
+{
+  vm_offset_t offset;
+  vm_size_t length;
+  struct pokeloc *next;
+};
+
+struct pokeloc *pokelist;
+spin_lock_t pokelistlock = SPIN_LOCK_INITIALIZER;
+
+/* Remember that data here on the disk has been modified. */
+void
+record_poke (void *loc, vm_size_t length)
+{
+  struct pokeloc *pl = malloc (sizeof (struct pokeloc));
+  vm_offset_t offset;
+
+  offset = loc - disk_image;
+  pl->offset = trunc_page (offset);
+  pl->length = round_page (offset + length) - pl->offset;
+
+  spin_lock (&pokelistlock);
+  pl->next = pokelist;
+  pokelist = pl;
+  spin_unlock (&pokelistlock);
+}
+
+/* Get rid of any outstanding pokes.  */
+void
+flush_pokes ()
+{
+  struct pokeloc *pl;
+
+  spin_lock (&pokelistlock);
+  pl = pokelist;
+  pokelist = 0;
+  spin_unlock (&pokelistlock);
+
+  while (pl)
+    {
+      struct pokeloc *next = pl->next;
+      free (pl);
+      pl = next;
+    }
+}
+
+/* Sync all the modified pieces of disk */
+void
+sync_disk (int wait)
+{
+  struct pokeloc *pl, *tmp;
+
+  spin_lock (&pokelistlock);
+  for (pl = pokelist; pl; pl = tmp)
+    {
+      pager_sync_some (diskfs_disk_pager, pl->offset, pl->length, wait);
+      tmp = pl->next;
+      free (pl);
+    }
+  pokelist = 0;
+  spin_unlock (&pokelistlock);
+}
+