[Devel] [PATCH VZ10 9/9] ve/cgroup-v2: Don't hide default cgroup when ve controller is enabled on it

[Pavel Tikhomirov]

Else default hierarchy is hidden in container and that prevents systemd
from booting.

https://virtuozzo.atlassian.net/browse/VSTOR-104639
Signed-off-by: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>

Feature: ve: ve generic structures
---
 kernel/cgroup/cgroup.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index d6a762398ea5..7befa430f2f8 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -6912,7 +6912,10 @@ void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen)
 int ve_hide_cgroups(struct cgroup_root *root)
 {
 	struct ve_struct *ve = get_exec_env();
-	unsigned long hidden_mask = (1UL << ve_cgrp_id);
+	unsigned long hidden_mask = 0;
+
+	if (!cgroup_subsys_on_dfl(ve_cgrp_subsys))
+		hidden_mask = (1UL << ve_cgrp_id);
 
 	/*
 	 * Hide ve cgroup in CT for docker, still showing it to pseudosuper
-- 
2.52.0