From 5e2df3d07f63128259a9677acdbbbcd983069110 Mon Sep 17 00:00:00 2001
From: Pavel Hrdina <phrdina@redhat.com>
Date: Sun, 19 Aug 2018 19:17:27 +0200
Subject: [PATCH] vircgroup: extract virCgroupV1HasController
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Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
---
 src/util/vircgroup.c        | 3 ++-
 src/util/vircgroupbackend.h | 5 +++++
 src/util/vircgroupv1.c      | 9 +++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 61c62b08c2..80b9a0c83f 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -1439,7 +1439,8 @@ virCgroupHasController(virCgroupPtr cgroup, int controller)
         return false;
     if (controller < 0 || controller >= VIR_CGROUP_CONTROLLER_LAST)
         return false;
-    return cgroup->controllers[controller].mountPoint != NULL;
+
+    return cgroup->backend->hasController(cgroup, controller);
 }
 
 
diff --git a/src/util/vircgroupbackend.h b/src/util/vircgroupbackend.h
index 011d1b00da..29b2fd119f 100644
--- a/src/util/vircgroupbackend.h
+++ b/src/util/vircgroupbackend.h
@@ -73,6 +73,10 @@ typedef int
 (*virCgroupDetectControllersCB)(virCgroupPtr group,
                                 int controllers);
 
+typedef bool
+(*virCgroupHasControllerCB)(virCgroupPtr cgroup,
+                            int controller);
+
 struct _virCgroupBackend {
     virCgroupBackendType type;
 
@@ -86,6 +90,7 @@ struct _virCgroupBackend {
     virCgroupValidatePlacementCB validatePlacement;
     virCgroupStealPlacementCB stealPlacement;
     virCgroupDetectControllersCB detectControllers;
+    virCgroupHasControllerCB hasController;
 };
 typedef struct _virCgroupBackend virCgroupBackend;
 typedef virCgroupBackend *virCgroupBackendPtr;
diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
index 9a04cc1818..0b41fca1cc 100644
--- a/src/util/vircgroupv1.c
+++ b/src/util/vircgroupv1.c
@@ -477,6 +477,14 @@ virCgroupV1DetectControllers(virCgroupPtr group,
 }
 
 
+static bool
+virCgroupV1HasController(virCgroupPtr group,
+                         int controller)
+{
+    return group->controllers[controller].mountPoint != NULL;
+}
+
+
 virCgroupBackend virCgroupV1Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V1,
 
@@ -489,6 +497,7 @@ virCgroupBackend virCgroupV1Backend = {
     .validatePlacement = virCgroupV1ValidatePlacement,
     .stealPlacement = virCgroupV1StealPlacement,
     .detectControllers = virCgroupV1DetectControllers,
+    .hasController = virCgroupV1HasController,
 };