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[v2,03/16] API/cgroup: Add cgroup_find_root helper function

Message ID a2dcecaff944aaefaf651268d60380343a49afe1.1642601554.git.luke.nowakowskikrijger@canonical.com
State Superseded
Headers show
Series Expand Cgroup lib and modify controller tests | expand

Commit Message

Luke Nowakowski-Krijger Jan. 19, 2022, 2:44 p.m. UTC 
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>
---
v2: Use the for_each_root() macro to properly loop over v1 roots

 lib/tst_cgroup.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

diff --git a/lib/tst_cgroup.c b/lib/tst_cgroup.c
index 8b8619b36..7a406c9db 100644
--- a/lib/tst_cgroup.c
+++ b/lib/tst_cgroup.c
@@ -363,6 +363,18 @@  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;
+
+	for_each_root(root) {
+		if (!strcmp(root->mnt_path, mnt_path))
+				return root;
+	}
+
+	return NULL;
+}
+
 /* 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