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Re: [Qemu-devel] [PATCH 2/5] vmdk: add support for “zeroed‐grain” GTE
From: |
Fam Zheng |
Subject: |
Re: [Qemu-devel] [PATCH 2/5] vmdk: add support for “zeroed‐grain” GTE |
Date: |
Fri, 19 Apr 2013 17:10:30 +0800 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, 04/19 10:59, Stefan Hajnoczi wrote:
> 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.
This is an internal structure holding information for extent, used the
same way as BDRVVmdkState, there is no direct correspondence to file
header fields, so I think it should be OK, as `int qcow_version' is also
found in block/qcow2.h.
>
> > @@ -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?
Yes.
--
Fam