From 3fb1deb13bf78378ab8a90a7f8342569f1eb50b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Pierre=20Andr=C3=A9?= <jpandre@users.sourceforge.net>
Date: Fri, 17 Apr 2015 09:21:58 +0200
Subject: [PATCH] Fixed getting sector size from a partition image (Windows
 variant)

On Windows, when processing a partition image, get the sector size
from the boot sector instead of the containing partition.
---
 libntfs-3g/win32_io.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libntfs-3g/win32_io.c b/libntfs-3g/win32_io.c
index 9c84ec67..c4c09d7d 100644
--- a/libntfs-3g/win32_io.c
+++ b/libntfs-3g/win32_io.c
@@ -1881,7 +1881,11 @@ static int ntfs_device_win32_ioctl(struct ntfs_device *dev, int request,
 #ifdef BLKSSZGET
 	case BLKSSZGET:
 		ntfs_log_debug("BLKSSZGET detected.\n");
-		return ntfs_win32_blksszget(dev, (int *)argp);
+		if (fd && !fd->ntdll) {
+			*(int*)argp = fd->geo_sector_size;
+			return (0);
+		} else
+			return ntfs_win32_blksszget(dev, (int *)argp);
 #endif
 #ifdef BLKBSZSET
 	case BLKBSZSET: