From 171c700cd8c5509dc868c00faed9a16feaa2339d Mon Sep 17 00:00:00 2001
From: Pavel Hrdina <phrdina@redhat.com>
Date: Sun, 19 Aug 2018 19:43:04 +0200
Subject: [PATCH] vircgroup: introduce virCgroupV2GetAnyController

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
---
 src/util/vircgroupv2.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index a9f8f8aa5e..08ff62d304 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -306,6 +306,14 @@ virCgroupV2HasController(virCgroupPtr group,
 }
 
 
+static int
+virCgroupV2GetAnyController(virCgroupPtr group)
+{
+    /* The least significant bit is position 1. */
+    return ffs(group->unified.controllers) - 1;
+}
+
+
 virCgroupBackend virCgroupV2Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V2,
 
@@ -319,6 +327,7 @@ virCgroupBackend virCgroupV2Backend = {
     .stealPlacement = virCgroupV2StealPlacement,
     .detectControllers = virCgroupV2DetectControllers,
     .hasController = virCgroupV2HasController,
+    .getAnyController = virCgroupV2GetAnyController,
 };