[Qemu-devel] [PATCH] block: Fix vpc initialization of the Dynamic Disk Header

[Charles Arnold]

The Data Offset field in the Dynamic Disk Header is an 8 byte field.
Although the specification (2006-10-11) gives an example of initializing
only the first 4 bytes, images generated by Microsoft on Windows initialize 
all 8 bytes.

Failure to initialize all 8 bytes results in errors from utilities
that check specifically for the complete Data Offset field initialization.

Signed-off-by: Charles Arnold <address@hidden>

diff --git a/block/vpc.c b/block/vpc.c
index 416f489..35ac3fd 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -585,7 +585,7 @@ static int vpc_create(const char *filename, 
QEMUOptionParameter *options)

     memcpy(dyndisk_header->magic, "cxsparse", 8);

-    dyndisk_header->data_offset = be64_to_cpu(0xFFFFFFFF);
+    dyndisk_header->data_offset = be64_to_cpu(0xFFFFFFFFFFFFFFFFULL);
     dyndisk_header->table_offset = be64_to_cpu(3 * 512);
     dyndisk_header->version = be32_to_cpu(0x00010000);
     dyndisk_header->block_size = be32_to_cpu(block_size);