Re: [Qemu-devel] [PATCH v2 11/13] block: Add list of children to BlockDriverState

[Eric Blake]

On 06/10/2015 07:47 AM, Kevin Wolf wrote:
> This allows iterating over all children of a given BDS, not only
> including bs->file and bs->backing_hd, but also driver-specific
> ones like VMDK extents or Quorum children.
> 
> For bdrv_swap(), the list of children of the swapped BDS stays at that
> BDS (because that's where the pointers stay as well). The list head
> moves and pointers to it must be fixed up therefore.
> 
> The list of children in the parent of the swapped BDS is not affected by
> the swap. The contents of the BDS objects is swapped, so the existing
> pointer in the parent automatically points to the newly swapped in BDS.
> 
> Signed-off-by: Kevin Wolf <address@hidden>
> ---
>  block.c                   | 37 +++++++++++++++++++++++++++++++++++++
>  include/block/block_int.h |  8 ++++++++
>  2 files changed, 45 insertions(+)
> 

Reviewed-by: Eric Blake <address@hidden>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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