Re: [Qemu-devel] [PATCH v2] vmdk: fix cluster size check for flat extents

[Fam Zheng <famz@redhat.com>]

On Mon, 09/23 17:18, Fam Zheng wrote:
> We use the extent size as cluster size for flat extents (where no L1/L2
> table is allocated so it's safe) reuse sector calculating code with
> sparse extents.
> 
> Don't pass in the cluster size for adding flat extent, just set it to
> sectors later, then the cluster size checking will not fail.
> 
> The cluster_sectors is changed to int64_t to allow big flat extent.
> 
> Without this, flat extent opening is broken:
> 
>     # qemu-img create -f vmdk -o subformat=monolithicFlat /tmp/a.vmdk 100G
>     Formatting '/tmp/a.vmdk', fmt=vmdk size=107374182400 compat6=off subformat='monolithicFlat' zeroed_grain=off
>     # qemu-img info /tmp/a.vmdk
>     image: /tmp/a.vmdk
>     file format: raw
>     virtual size: 0 (0 bytes)
>     disk size: 4.0K
> 
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---

When adding a test case, iotests case 059 seems broken now, it will perhaps
take some time to check and I'll post a fix together with test case for this
later.

Fam