From: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
We are going to reuse bdrv_common_block_status_above in
bdrv_is_allocated_above. bdrv_is_allocated_above may be called with
include_base == false and still bs == base (for ex. from img_rebase()).
So, support this corner case.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Kevin Wolf <kw...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: Alberto Garcia <be...@igalia.com>
Message-id: 20200924194003.22080-4-vsement...@virtuozzo.com
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block/io.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/block/io.c b/block/io.c
index 86f76d04bf..b616bc4ada 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2355,9 +2355,13 @@ bdrv_co_common_block_status_above(BlockDriverState *bs,
BlockDriverState *p;
int64_t eof = 0;
- assert(include_base || bs != base);
assert(!include_base || base); /* Can't include NULL base */
+ if (!include_base && bs == base) {
+ *pnum = bytes;
+ return 0;
+ }
+
ret = bdrv_co_block_status(bs, want_zero, offset, bytes, pnum, map, file);
if (ret < 0 || *pnum == 0 || ret & BDRV_BLOCK_ALLOCATED || bs == base) {
return ret;
--
2.26.2
