Re: [Qemu-devel] [PATCH 2/5] vmdk: add support for “zeroed‐grain” GTE

[Stefan Hajnoczi <stefanha@gmail.com>]

On Fri, Apr 19, 2013 at 11:48:42AM +0800, Fam Zheng wrote:
> diff --git a/block/vmdk.c b/block/vmdk.c
> index 450a721..5e60940 100644
> --- a/block/vmdk.c
> +++ b/block/vmdk.c
> @@ -33,10 +33,13 @@
>  #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
>  #define VMDK4_COMPRESSION_DEFLATE 1
>  #define VMDK4_FLAG_RGD (1 << 1)
> +/* Zeroed-grain enable bit */
> +#define VMDK4_FLAG_ZG   (1 << 2)

Please use a clear name like VMDK4_FLAG_ZERO_GRAIN.

> @@ -81,6 +84,8 @@ typedef struct VmdkExtent {
>      bool flat;
>      bool compressed;
>      bool has_marker;
> +    bool has_zero_grain;
> +    int version;

uint32_t according to the spec.  Please use fixed-size integer types
instead of int, long, etc which can change depending on the host
architecture.

> @@ -1181,7 +1193,7 @@ static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
>                                  sector_num << 9, !extent->compressed,
>                                  &cluster_offset);
>          if (extent->compressed) {
> -            if (ret == 0) {
> +            if (ret == VMDK_OK) {

Should this be squashed into the previous patch?