Add a static method to the Cgroup class to get a controller's
mount point. Works with both cgroup v1 and cgroup v2.
Signed-off-by: Tom Hromatka <tom.hroma...@oracle.com>
---
ftests/cgroup.py | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/ftests/cgroup.py b/ftests/cgroup.py
index b1aa0f2eb557..ae96f20250a6 100644
--- a/ftests/cgroup.py
+++ b/ftests/cgroup.py
@@ -537,3 +537,45 @@ class Cgroup(object):
return config.container.run(cmd)
else:
return Run.run(cmd)
+
+ @staticmethod
+ def __get_controller_mount_point_v1(ctrl_name):
+ with open('/proc/mounts', 'r') as mntf:
+ for line in mntf.readlines():
+ mnt_path = line.split()[1]
+
+ if line.split()[0] == 'cgroup':
+ for option in line.split()[3].split(','):
+ if option == ctrl_name:
+ return line.split()[1]
+
+ raise IndexError("Unknown mount point for controller
{}".format(ctrl_name))
+
+ @staticmethod
+ def __get_controller_mount_point_v2(ctrl_name):
+ with open('/proc/mounts', 'r') as mntf:
+ for line in mntf.readlines():
+ mnt_path = line.split()[1]
+
+ if line.split()[0] == 'cgroup2':
+ ctrl_file = os.path.join(line.split()[1],
+ 'cgroup.controllers')
+
+ with open(ctrl_file, 'r') as ctrlf:
+ controllers = ctrlf.readline()
+ for controller in controllers.split():
+ if controller == ctrl_name:
+ return mnt_path
+
+ raise IndexError("Unknown mount point for controller
{}".format(ctrl_name))
+
+ @staticmethod
+ def get_controller_mount_point(ctrl_name):
+ vers = CgroupVersion.get_version(ctrl_name)
+
+ if vers == CgroupVersion.CGROUP_V1:
+ return Cgroup.__get_controller_mount_point_v1(ctrl_name)
+ elif vers == CgroupVersion.CGROUP_V2:
+ return Cgroup.__get_controller_mount_point_v2(ctrl_name)
+ else:
+ raise ValueError("Unsupported cgroup version")
--
2.26.2
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