[libvirt] [PATCH 2/2] vircgroup: Ensure /machine group is associated with its parent

[Miguel Ángel Arruga Vivas]

Call first virCgroupNew on the parent group virCgroupNewPartition if
it is available on before the creation of the child group.  This
ensures that the creation of a first level group on the unified
architecture, as the check at virCgroupV2ParseControllersFile as the
parent file is there.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1760233
Signed-off-by: Miguel Ángel Arruga Vivas <rosen644835 at gmail.com>
---
 src/util/vircgroup.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index b46f20abfd..33c61f2d45 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -855,9 +855,6 @@ virCgroupNewPartition(const char *path,
     if (virCgroupSetPartitionSuffix(path, &newPath) < 0)
         goto cleanup;
 
-    if (virCgroupNew(-1, newPath, NULL, controllers, group) < 0)
-        goto cleanup;
-
     if (STRNEQ(newPath, "/")) {
         char *tmp;
         parentPath = g_strdup(newPath);
@@ -868,7 +865,12 @@ virCgroupNewPartition(const char *path,
 
         if (virCgroupNew(-1, parentPath, NULL, controllers, &parent) < 0)
             goto cleanup;
+    }
 
+    if (virCgroupNew(-1, newPath, parent, controllers, group) < 0)
+        goto cleanup;
+
+    if (parent) {
         if (virCgroupMakeGroup(parent, *group, create, VIR_CGROUP_NONE) < 0)
             goto cleanup;
     }
-- 
2.23.0