bdrv_format_default_perms() has one code path for backing files, and one
for storage files.  We want to pull them out into own functions, so
make sure they are completely distinct before so the next patches will
be a bit cleaner.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 block.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/block.c b/block.c
index 1d33f58ff8..982785b15a 100644
--- a/block.c
+++ b/block.c
@@ -2331,6 +2331,13 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
             perm |= BLK_PERM_CONSISTENT_READ;
         }
         shared &= ~(BLK_PERM_WRITE | BLK_PERM_RESIZE);
+
+        if (bs->open_flags & BDRV_O_INACTIVE) {
+            shared |= BLK_PERM_WRITE | BLK_PERM_RESIZE;
+        }
+
+        *nperm = perm;
+        *nshared = shared;
     } else {
         /* We want consistent read from backing files if the parent needs it.
          * No other operations are performed on backing files. */
@@ -2347,14 +2354,14 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
 
         shared |= BLK_PERM_CONSISTENT_READ | BLK_PERM_GRAPH_MOD |
                   BLK_PERM_WRITE_UNCHANGED;
-    }
 
-    if (bs->open_flags & BDRV_O_INACTIVE) {
-        shared |= BLK_PERM_WRITE | BLK_PERM_RESIZE;
-    }
+        if (bs->open_flags & BDRV_O_INACTIVE) {
+            shared |= BLK_PERM_WRITE | BLK_PERM_RESIZE;
+        }
 
-    *nperm = perm;
-    *nshared = shared;
+        *nperm = perm;
+        *nshared = shared;
+    }
 }
 
 uint64_t bdrv_qapi_perm_to_blk_perm(BlockPermission qapi_perm)
-- 
2.24.1