From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Thu, 29 Aug 2019 11:56:56 +0000 (+0200)
Subject: cgroups: check for empty cgroups on freeze/unfreeze
X-Git-Tag: lxc-4.0.0~122^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=81468ea7c0315605c637506369cb37320b981339;p=thirdparty%2Flxc.git

cgroups: check for empty cgroups on freeze/unfreeze

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index be1fd8773..1300e24a3 100644
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -2003,6 +2003,9 @@ __cgfsng_ops static bool cgfsng_freeze(struct cgroup_ops *ops)
 	__do_fclose FILE *f = NULL;
 	struct hierarchy *h;
 
+	if (!ops->hierarchies)
+		return true;
+
 	if (ops->cgroup_layout != CGROUP_LAYOUT_UNIFIED) {
 		h = get_hierarchy(ops, "freezer");
 		if (!h)
@@ -2054,6 +2057,9 @@ __cgfsng_ops static bool cgfsng_unfreeze(struct cgroup_ops *ops)
 	__do_free char *fullpath = NULL;
 	struct hierarchy *h;
 
+	if (!ops->hierarchies)
+		return true;
+
 	if (ops->cgroup_layout != CGROUP_LAYOUT_UNIFIED) {
 		h = get_hierarchy(ops, "freezer");
 		if (!h)