Initial revision

1 files changed, 70 insertions, 0 deletions

diff --git a/ext2fs/devio.c b/ext2fs/devio.c
new file mode 100644
index 00000000..2e5cc332
--- /dev/null
+++ b/ext2fs/devio.c
@@ -0,0 +1,70 @@
+/* Device input and output
+   Copyright (C) 1992, 1993, 1994 Free Software Foundation
+
+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 the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Written by Michael I. Bushnell.  */
+
+#include "ufs.h"
+#include <device/device.h>
+#include <device/device_request.h>
+
+/* Write disk block ADDR with DATA of LEN bytes, waiting for completion.  */
+error_t
+dev_write_sync (daddr_t addr,
+		vm_address_t data,
+		long len)
+{
+  int foo;
+  assert (!diskfs_readonly);
+  if (device_write (ufs_device, 0, addr, (io_buf_ptr_t) data, len, &foo)
+      || foo != len)
+    return EIO;
+  return 0;
+}
+
+/* Write diskblock ADDR with DATA of LEN bytes; don't bother waiting
+   for completion. */
+error_t
+dev_write (daddr_t addr,
+	   vm_address_t data,
+	   long len)
+{
+  assert (!diskfs_readonly);
+  if (device_write_request (ufs_device, MACH_PORT_NULL, 0, addr,
+			    (io_buf_ptr_t) data, len))
+    return EIO;
+  return 0;
+}
+
+static int deverr;
+
+/* Read disk block ADDR; put the address of the data in DATA; read LEN
+   bytes.  Always *DATA should be a full page no matter what.   */
+error_t
+dev_read_sync (daddr_t addr,
+	       vm_address_t *data,
+	       long len)
+{
+  int foo;
+  deverr = device_read (ufs_device, 0, addr, len, (io_buf_ptr_t *)data,
+			(u_int *)&foo);
+  if (deverr || foo != len)
+    return EIO;
+  return 0;
+}
+