Commit 72c6cc94 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

vpc: Implement .bdrv_has_zero_init 



Depending on the subformat, has_zero_init on VHD must behave like raw
and query the underlying storage (fixed) or like other sparse formats
that can always return 1 (dynamic, differencing).

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 8ed610a1

block/vpc.c

+19 −6
Original line number Diff line number Diff line
@@ -786,6 +786,18 @@ static int vpc_create(const char *filename, QEMUOptionParameter *options) 
    return ret;

}



static int vpc_has_zero_init(BlockDriverState *bs)

{

    BDRVVPCState *s = bs->opaque;

    struct vhd_footer *footer =  (struct vhd_footer *) s->footer_buf;



    if (cpu_to_be32(footer->type) == VHD_FIXED) {

        return bdrv_has_zero_init(bs->file);

    } else {

        return 1;

    }

}



static void vpc_close(BlockDriverState *bs)

{

    BDRVVPCState *s = bs->opaque;
@@ -828,6 +840,7 @@ static BlockDriver bdrv_vpc = { 
    .bdrv_write             = vpc_co_write,



    .create_options         = vpc_create_options,

    .bdrv_has_zero_init     = vpc_has_zero_init,

};



static void bdrv_vpc_init(void)