vpc: Implement .bdrv_has_zero_init
PATCH 1/1 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 Kevin Wolf <[email protected]>
--- block/vpc.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-)
block/vpc.c +19 -6
@@ -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;
@@ -818,16 +830,17 @@ static BlockDriver bdrv_vpc = { .format_name = "vpc", .instance_size = sizeof(BDRVVPCState), - .bdrv_probe = vpc_probe, - .bdrv_open = vpc_open, - .bdrv_close = vpc_close, - .bdrv_reopen_prepare = vpc_reopen_prepare, - .bdrv_create = vpc_create, + .bdrv_probe = vpc_probe, + .bdrv_open = vpc_open, + .bdrv_close = vpc_close, + .bdrv_reopen_prepare = vpc_reopen_prepare, + .bdrv_create = vpc_create, .bdrv_read = vpc_co_read, .bdrv_write = vpc_co_write, - .create_options = vpc_create_options, + .create_options = vpc_create_options, + .bdrv_has_zero_init = vpc_has_zero_init, };static void bdrv_vpc_init (void )
Signature · 1 line
1.8.1.4