vircgroup: extract virCgroupV1PathOfController

Reviewed-by: NFabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

src/util/vircgroup.c

@@ -1456,27 +1456,7 @@ virCgroupPathOfController(virCgroupPtr group,
         return -1;
     }
 
-    if (group->controllers[controller].mountPoint == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("Controller '%s' is not mounted"),
-                       virCgroupControllerTypeToString(controller));
-        return -1;
-    }
-
-    if (group->controllers[controller].placement == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("Controller '%s' is not enabled for group"),
-                       virCgroupControllerTypeToString(controller));
-        return -1;
-    }
-
-    if (virAsprintf(path, "%s%s/%s",
-                    group->controllers[controller].mountPoint,
-                    group->controllers[controller].placement,
-                    key ? key : "") < 0)
-        return -1;
-
-    return 0;
+    return group->backend->pathOfController(group, controller, key, path);
 }
 
 

src/util/vircgroupbackend.h

@@ -80,6 +80,12 @@ typedef bool
 typedef int
 (*virCgroupGetAnyControllerCB)(virCgroupPtr group);
 
+typedef int
+(*virCgroupPathOfControllerCB)(virCgroupPtr group,
+                               int controller,
+                               const char *key,
+                               char **path);
+
 struct _virCgroupBackend {
     virCgroupBackendType type;
 
@@ -95,6 +101,7 @@ struct _virCgroupBackend {
     virCgroupDetectControllersCB detectControllers;
     virCgroupHasControllerCB hasController;
     virCgroupGetAnyControllerCB getAnyController;
+    virCgroupPathOfControllerCB pathOfController;
 };
 typedef struct _virCgroupBackend virCgroupBackend;
 typedef virCgroupBackend *virCgroupBackendPtr;

src/util/vircgroupv1.c

@@ -506,6 +506,36 @@ virCgroupV1GetAnyController(virCgroupPtr group)
 }
 
 
+static int
+virCgroupV1PathOfController(virCgroupPtr group,
+                            int controller,
+                            const char *key,
+                            char **path)
+{
+    if (group->controllers[controller].mountPoint == NULL) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("v1 controller '%s' is not mounted"),
+                       virCgroupV1ControllerTypeToString(controller));
+        return -1;
+    }
+
+    if (group->controllers[controller].placement == NULL) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("v1 controller '%s' is not enabled for group"),
+                       virCgroupV1ControllerTypeToString(controller));
+        return -1;
+    }
+
+    if (virAsprintf(path, "%s%s/%s",
+                    group->controllers[controller].mountPoint,
+                    group->controllers[controller].placement,
+                    key ? key : "") < 0)
+        return -1;
+
+    return 0;
+}
+
+
 virCgroupBackend virCgroupV1Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V1,
 
@@ -520,6 +550,7 @@ virCgroupBackend virCgroupV1Backend = {
     .detectControllers = virCgroupV1DetectControllers,
     .hasController = virCgroupV1HasController,
     .getAnyController = virCgroupV1GetAnyController,
+    .pathOfController = virCgroupV1PathOfController,
 };