vpc, vhdx: add get_info

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/block/vpc.c b/block/vpc.c
index 577cc45992..551876fef7 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -455,6 +455,18 @@ fail:
     return -1;
 }
 
+static int vpc_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
+{
+    BDRVVPCState *s = (BDRVVPCState *)bs->opaque;
+    VHDFooter *footer = (VHDFooter *) s->footer_buf;
+
+    if (cpu_to_be32(footer->type) != VHD_FIXED) {
+        bdi->cluster_size = s->block_size;
+    }
+
+    return 0;
+}
+
 static int vpc_read(BlockDriverState *bs, int64_t sector_num,
                     uint8_t *buf, int nb_sectors)
 {
@@ -857,6 +869,8 @@ static BlockDriver bdrv_vpc = {
     .bdrv_read              = vpc_co_read,
     .bdrv_write             = vpc_co_write,
 
+    .bdrv_get_info          = vpc_get_info,
+
     .create_options         = vpc_create_options,
     .bdrv_has_zero_init     = vpc_has_zero_init,
 };