Am 09.08.2019 um 18:13 hat Max Reitz geschrieben: > Filters cannot compress data themselves but they have to implement > .bdrv_co_pwritev_compressed() still (or they cannot forward compressed > writes). Therefore, checking whether > bs->drv->bdrv_co_pwritev_compressed is non-NULL is not sufficient to > know whether the node can actually handle compressed writes. This > function looks down the filter chain to see whether there is a > non-filter that can actually convert the compressed writes into > compressed data (and thus normal writes). > > Signed-off-by: Max Reitz <mre...@redhat.com> > Reviewed-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Should patches 2 and 3 that add the .bdrv_co_pwritev_compressed() callback to filter drivers come only after this one? And should we also support it in the mirror filter? Kevin
