diff options
| author | Charles Arnold <carnold@suse.com> | 2011-11-09 09:32:25 -0700 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-11-11 14:02:58 +0100 |
| commit | 78439f6af1caa3e8bdafc9fc2d62aeefa53ed63a (patch) | |
| tree | 432dd134df4d472859650287958aee7b95006bff /block/vpc.c | |
| parent | 802ddc375acabf06c0cb5a2716ca3573bc9ca89f (diff) | |
block: Fix vpc initialization of the Dynamic Disk Header
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
like Citrix's vhd-util which checks specifically for the proper Data
Offset field initialization.
Signed-off-by: Charles Arnold <carnold@suse.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vpc.c')
| -rw-r--r-- | block/vpc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/block/vpc.c b/block/vpc.c index 79be7d051b..54633b65f2 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -617,7 +617,11 @@ static int vpc_create(const char *filename, QEMUOptionParameter *options) memcpy(dyndisk_header->magic, "cxsparse", 8); - dyndisk_header->data_offset = be64_to_cpu(0xFFFFFFFF); + /* + * Note: The spec is actually wrong here for data_offset, it says + * 0xFFFFFFFF, but MS tools expect all 64 bits to be set. + */ + 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); |