diff mbox series

[v2,03/19] API/cgroup: Add cgroup_find_root helper function

Message ID 964c70e902068685fad0bac4745ba1919994acb9.1651176646.git.luke.nowakowskikrijger@canonical.com
State Changes Requested
Headers show
Series Expand Cgroup lib and modify controller tests | expand

Commit Message

Luke Nowakowski-Krijger April 28, 2022, 8:39 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 | 13 +++++++++++++
 1 file changed, 13 insertions(+)
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Patch

diff --git a/lib/tst_cgroup.c b/lib/tst_cgroup.c
index a3416f4df..b8632cdf3 100644
--- a/lib/tst_cgroup.c
+++ b/lib/tst_cgroup.c
@@ -363,6 +363,19 @@  static struct cgroup_ctrl *cgroup_find_ctrl(const char *const ctrl_name)
 	return NULL;
 }
 
+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