[PATCH 06/21] block: rewrite bdrv_child_try_set_perm() using bdrv_refresh_perms()

[Vladimir Sementsov-Ogievskiy]

We are going to drop recursive bdrv_child_* functions, so stop use them
in bdrv_child_try_set_perm() as a first step.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
---
 block.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/block.c b/block.c
index e12acd5029..a9e4d2b57c 100644
--- a/block.c
+++ b/block.c
@@ -2372,11 +2372,16 @@ int bdrv_child_try_set_perm(BdrvChild *c, uint64_t 
perm, uint64_t shared,
                             Error **errp)
 {
     Error *local_err = NULL;
+    GSList *tran = NULL;
     int ret;
 
-    ret = bdrv_child_check_perm(c, NULL, perm, shared, NULL, &local_err);
+    bdrv_child_set_perm_safe(c, perm, shared, &tran);
+
+    ret = bdrv_refresh_perms(c->bs, &local_err);
+
+    tran_finalize(tran, ret);
+
     if (ret < 0) {
-        bdrv_child_abort_perm_update(c);
         if ((perm & ~c->perm) || (c->shared_perm & ~shared)) {
             /* tighten permissions */
             error_propagate(errp, local_err);
@@ -2390,12 +2395,9 @@ int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, 
uint64_t shared,
             error_free(local_err);
             ret = 0;
         }
-        return ret;
     }
 
-    bdrv_child_set_perm(c);
-
-    return 0;
+    return ret;
 }
 
 int bdrv_child_refresh_perms(BlockDriverState *bs, BdrvChild *c, Error **errp)
-- 
2.21.3