From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Fri, 21 May 2021 15:24:38 +0000 (+0200)
Subject: cgroups: rework check whether legacy hierarchy is writable
X-Git-Tag: lxc-5.0.0~165^2~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98db769c836baede4ce2e070fc0791e82b683a30;p=thirdparty%2Flxc.git

cgroups: rework check whether legacy hierarchy is writable

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

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index 80fcbb93c..5bd703bfa 100644
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -3077,8 +3077,11 @@ static bool unified_hierarchy_delegated(int dfd_base, char ***ret_files)
 
 static bool legacy_hierarchy_delegated(int dfd_base)
 {
-	if (faccessat(dfd_base, "cgroup.procs", W_OK, 0) && errno != ENOENT)
-		return sysinfo_ret(false, "The cgroup.procs file is not writable, skipping legacy hierarchy");
+	int ret;
+
+	ret = faccessat(dfd_base, ".", W_OK, 0);
+	if (ret < 0 && errno != ENOENT)
+		return sysinfo_ret(false, "Legacy hierarchy not writable, skipping");
 
 	return true;
 }