Rename io_raw module to more appropriate file_windows

1 files changed, 164 insertions, 0 deletions

diff --git a/blockdev/windows/file_windows.c b/blockdev/windows/file_windows.c
new file mode 100644
index 0000000..9178243
--- /dev/null
+++ b/blockdev/windows/file_windows.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <ext4_config.h>
+#include <ext4_blockdev.h>
+#include <ext4_errno.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+
+#ifdef WIN32
+#include <windows.h>
+#include <winioctl.h>
+
+/**@brief   Default filename.*/
+static const char *fname = "ext2";
+
+/**@brief   IO block size.*/
+#define EXT4_IORAW_BSIZE 512
+
+/**@brief   Image file descriptor.*/
+static HANDLE dev_file;
+
+/**********************BLOCKDEV INTERFACE**************************************/
+static int io_raw_open(struct ext4_blockdev *bdev);
+static int io_raw_bread(struct ext4_blockdev *bdev, void *buf, uint64_t blk_id,
+			uint32_t blk_cnt);
+static int io_raw_bwrite(struct ext4_blockdev *bdev, const void *buf,
+			 uint64_t blk_id, uint32_t blk_cnt);
+static int io_raw_close(struct ext4_blockdev *bdev);
+
+/******************************************************************************/
+EXT4_BLOCKDEV_STATIC_INSTANCE(_filedev, EXT4_IORAW_BSIZE, 0, io_raw_open,
+			      io_raw_bread, io_raw_bwrite, io_raw_close, 0, 0);
+
+/******************************************************************************/
+static int io_raw_open(struct ext4_blockdev *bdev)
+{
+	char path[64];
+	DISK_GEOMETRY pdg;
+	uint64_t disk_size;
+	BOOL bResult = FALSE;
+	DWORD junk;
+
+	sprintf(path, "\\\\.\\%s", fname);
+
+	dev_file =
+	    CreateFile(path, GENERIC_READ | GENERIC_WRITE,
+		       FILE_SHARE_WRITE | FILE_SHARE_READ, NULL, OPEN_EXISTING,
+		       FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH, NULL);
+
+	if (dev_file == INVALID_HANDLE_VALUE) {
+		return EIO;
+	}
+
+	bResult =
+	    DeviceIoControl(dev_file, IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0,
+			    &pdg, sizeof(pdg), &junk, (LPOVERLAPPED)NULL);
+
+	if (bResult == FALSE) {
+		CloseHandle(dev_file);
+		return EIO;
+	}
+
+	disk_size = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
+		    (ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
+
+	_filedev.bdif->ph_bsize = pdg.BytesPerSector;
+	_filedev.bdif->ph_bcnt = disk_size / pdg.BytesPerSector;
+
+	_filedev.part_offset = 0;
+	_filedev.part_size = disk_size;
+
+	return EOK;
+}
+
+/******************************************************************************/
+
+static int io_raw_bread(struct ext4_blockdev *bdev, void *buf, uint64_t blk_id,
+			uint32_t blk_cnt)
+{
+	long hipart = blk_id >> (32 - 9);
+	long lopart = blk_id << 9;
+	long err;
+
+	SetLastError(0);
+	lopart = SetFilePointer(dev_file, lopart, &hipart, FILE_BEGIN);
+
+	if (lopart == -1 && NO_ERROR != (err = GetLastError())) {
+		return EIO;
+	}
+
+	DWORD n;
+
+	if (!ReadFile(dev_file, buf, blk_cnt * 512, &n, NULL)) {
+		err = GetLastError();
+		return EIO;
+	}
+	return EOK;
+}
+
+/******************************************************************************/
+static int io_raw_bwrite(struct ext4_blockdev *bdev, const void *buf,
+			 uint64_t blk_id, uint32_t blk_cnt)
+{
+	long hipart = blk_id >> (32 - 9);
+	long lopart = blk_id << 9;
+	long err;
+
+	SetLastError(0);
+	lopart = SetFilePointer(dev_file, lopart, &hipart, FILE_BEGIN);
+
+	if (lopart == -1 && NO_ERROR != (err = GetLastError())) {
+		return EIO;
+	}
+
+	DWORD n;
+
+	if (!WriteFile(dev_file, buf, blk_cnt * 512, &n, NULL)) {
+		err = GetLastError();
+		return EIO;
+	}
+	return EOK;
+}
+
+/******************************************************************************/
+static int io_raw_close(struct ext4_blockdev *bdev)
+{
+	CloseHandle(dev_file);
+	return EOK;
+}
+
+/******************************************************************************/
+struct ext4_blockdev *ext4_io_raw_dev_get(void) { return &_filedev; }
+/******************************************************************************/
+void ext4_io_raw_filename(const char *n) { fname = n; }
+
+/******************************************************************************/
+#endif