block: rewrite bdrv_child_try_set_perm() using bdrv_refresh_perms()

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 <vsementsov@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210428151804.439460-12-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/block.c b/block.c
index 0ee0c2f29a..4511766825 100644
--- a/block.c
+++ b/block.c
@@ -2454,11 +2454,16 @@ int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
                             Error **errp)
 {
     Error *local_err = NULL;
+    Transaction *tran = tran_new();
     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);
@@ -2472,12 +2477,9 @@ 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)