commit f1316edbfcea3b31181f22d737ac7cf80b395355
author Vladimir Sementsov-Ogievskiy <vladimir.sementsov-ogievskiy@openvz.org> Mon Nov 07 19:35:57 2022 +0300
committer Kevin Wolf <kwolf@redhat.com> Thu Dec 15 16:07:42 2022 +0100
tree 433d9e9639fe60b412f6997de4e73d71eab6de20
parent f38eaec4c3618dfc4a23e20435cefb5bf8325264

block: bdrv_refresh_perms(): allow external tran

Allow passing external Transaction pointer, stop creating extra
Transaction objects.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@openvz.org>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20221107163558.618889-4-vsementsov@yandex-team.ru>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

diff --git a/block.c b/block.c
index dc76120..f2f9178 100644
--- a/block.c
+++ b/block.c
@@ -2591,15 +2591,24 @@
 }
 
 
-static int bdrv_refresh_perms(BlockDriverState *bs, Error **errp)
+/* @tran is allowed to be NULL. In this case no rollback is possible */
+static int bdrv_refresh_perms(BlockDriverState *bs, Transaction *tran,
+                              Error **errp)
 {
     int ret;
-    Transaction *tran = tran_new();
+    Transaction *local_tran = NULL;
     g_autoptr(GSList) list = bdrv_topological_dfs(NULL, NULL, bs);
     GLOBAL_STATE_CODE();
 
+    if (!tran) {
+        tran = local_tran = tran_new();
+    }
+
     ret = bdrv_list_refresh_perms(list, NULL, tran, errp);
-    tran_finalize(tran, ret);
+
+    if (local_tran) {
+        tran_finalize(local_tran, ret);
+    }
 
     return ret;
 }
@@ -2615,7 +2624,7 @@
 
     bdrv_child_set_perm(c, perm, shared, tran);
 
-    ret = bdrv_refresh_perms(c->bs, &local_err);
+    ret = bdrv_refresh_perms(c->bs, tran, &local_err);
 
     tran_finalize(tran, ret);
 
@@ -3099,7 +3108,7 @@
         goto out;
     }
 
-    ret = bdrv_refresh_perms(child_bs, errp);
+    ret = bdrv_refresh_perms(child_bs, tran, errp);
 
 out:
     tran_finalize(tran, ret);
@@ -3140,7 +3149,7 @@
         goto out;
     }
 
-    ret = bdrv_refresh_perms(parent_bs, errp);
+    ret = bdrv_refresh_perms(parent_bs, tran, errp);
     if (ret < 0) {
         goto out;
     }
@@ -3168,7 +3177,7 @@
          * we're loosening restrictions. Errors of permission update are not
          * fatal in this case, ignore them.
          */
-        bdrv_refresh_perms(child_bs, NULL);
+        bdrv_refresh_perms(child_bs, NULL, NULL);
 
         /*
          * When the parent requiring a non-default AioContext is removed, the
@@ -3410,7 +3419,7 @@
         goto out;
     }
 
-    ret = bdrv_refresh_perms(bs, errp);
+    ret = bdrv_refresh_perms(bs, tran, errp);
 out:
     tran_finalize(tran, ret);
 
@@ -5223,7 +5232,7 @@
         goto out;
     }
 
-    ret = bdrv_refresh_perms(bs_new, errp);
+    ret = bdrv_refresh_perms(bs_new, tran, errp);
 out:
     tran_finalize(tran, ret);
 
@@ -6523,7 +6532,7 @@
      */
     if (bs->open_flags & BDRV_O_INACTIVE) {
         bs->open_flags &= ~BDRV_O_INACTIVE;
-        ret = bdrv_refresh_perms(bs, errp);
+        ret = bdrv_refresh_perms(bs, NULL, errp);
         if (ret < 0) {
             bs->open_flags |= BDRV_O_INACTIVE;
             return ret;
@@ -6668,7 +6677,7 @@
      * We only tried to loosen restrictions, so errors are not fatal, ignore
      * them.
      */
-    bdrv_refresh_perms(bs, NULL);
+    bdrv_refresh_perms(bs, NULL, NULL);
 
     /* Recursively inactivate children */
     QLIST_FOREACH(child, &bs->children, next) {