[LTP] [PATCH 2/6] API/cgroup: Add cgroup_find_root helper function

[Luke Nowakowski-Krijger]

Add a helper function similar to cgroup_find_ctrl to make matching paths
to roots more convenient.

Signed-off-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger@canonical.com>
---
 lib/tst_cgroup.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/tst_cgroup.c b/lib/tst_cgroup.c
index 166d0f97e..b06ae6ab7 100644
--- a/lib/tst_cgroup.c
+++ b/lib/tst_cgroup.c
@@ -365,6 +365,19 @@ static struct cgroup_ctrl *cgroup_find_ctrl(const char *const ctrl_name)
 	return ctrl;
 }
 
+static struct cgroup_root *cgroup_find_root(const char *const mnt_path)
+{
+	struct cgroup_root *root = roots;
+
+	while (root->ver && strcmp(root->mnt_path, mnt_path))
+		root++;
+
+	if (!root->ver)
+		root = NULL;
+
+	return root;
+}
+
 /* Determine if a mounted cgroup hierarchy is unique and record it if so.
  *
  * For CGroups V2 this is very simple as there is only one
-- 
2.32.0