[Qemu-devel] [PATCH v2 16/17] block: add default get_block_status implementation for protocols

[Paolo Bonzini <pbonzini@redhat.com>]

Protocols return raw data, so you can assume the offsets to pass
through unchanged.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 block.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/block.c b/block.c
index 0c867b8..557ce29 100644
--- a/block.c
+++ b/block.c
@@ -2991,7 +2991,11 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
 
     if (!bs->drv->bdrv_co_get_block_status) {
         *pnum = nb_sectors;
-        return BDRV_BLOCK_DATA;
+        ret = BDRV_BLOCK_DATA;
+        if (bs->drv->protocol_name) {
+            ret |= BDRV_BLOCK_OFFSET_VALID | (sector_num * BDRV_SECTOR_SIZE);
+        }
+        return ret;
     }
 
     ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
-- 
1.8.3.1