Initial revision

1 files changed, 54 insertions, 0 deletions

diff --git a/libdiskfs/dev-io.c b/libdiskfs/dev-io.c
new file mode 100644
index 00000000..9d0ed9d0
--- /dev/null
+++ b/libdiskfs/dev-io.c
@@ -0,0 +1,54 @@
+/* Device input and output
+   Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+
+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.  */
+
+#include <device/device.h>
+#include <device/device_request.h>
+
+#include <diskfs.h>
+
+/* Write disk block ADDR with DATA of LEN bytes to DISKFS_DEVICE, waiting for
+   completion.  ADDR is offset by DISKFS_DEVICE_START.  If an error occurs,
+   EIO is returned.  */
+error_t
+diskfs_device_write_sync (off_t addr, vm_address_t data, size_t len)
+{
+  int written;
+  assert (!diskfs_readonly);
+  if (device_write (diskfs_device, 0, diskfs_device_start + addr,
+		    (io_buf_ptr_t) data, len, &written)
+      || written != len)
+    return EIO;
+  return 0;
+}
+
+/* Read disk block ADDR from DISKFS_DEVICE; put the address of the data in
+   DATA; read LEN bytes.  Always *DATA should be a full page no matter what.
+   ADDR is offset by DISKFS_DEVICE_START.  If an error occurs, EIO is
+   returned.  */
+error_t
+diskfs_device_read_sync (off_t addr, vm_address_t *data, size_t len)
+{
+  unsigned read;
+  if (device_read (diskfs_device, 0, diskfs_device_start + addr, len,
+		   (io_buf_ptr_t *)data, &read)
+      || read != len)
+    return EIO;
+  return 0;
+}
+