vircgroup: extract virCgroupV1SupportsCpuBW

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

@@ -2681,18 +2681,7 @@ int virCgroupSetOwner(virCgroupPtr cgroup,
 bool
 virCgroupSupportsCpuBW(virCgroupPtr cgroup)
 {
-    VIR_AUTOFREE(char *) path = NULL;
-
-    if (!cgroup)
-        return false;
-
-    if (virCgroupPathOfController(cgroup, VIR_CGROUP_CONTROLLER_CPU,
-                                  "cpu.cfs_period_us", &path) < 0) {
-        virResetLastError();
-        return false;
-    }
-
-    return virFileExists(path);
+    VIR_CGROUP_BACKEND_CALL(cgroup, supportsCpuBW, false);
 }
 
 int

src/util/vircgroupbackend.h

@@ -300,6 +300,9 @@ typedef int
 (*virCgroupGetCpuCfsQuotaCB)(virCgroupPtr group,
                              long long *cfs_quota);
 
+typedef bool
+(*virCgroupSupportsCpuBWCB)(virCgroupPtr cgroup);
+
 struct _virCgroupBackend {
     virCgroupBackendType type;
 
@@ -361,6 +364,7 @@ struct _virCgroupBackend {
     virCgroupGetCpuCfsPeriodCB getCpuCfsPeriod;
     virCgroupSetCpuCfsQuotaCB setCpuCfsQuota;
     virCgroupGetCpuCfsQuotaCB getCpuCfsQuota;
+    virCgroupSupportsCpuBWCB supportsCpuBW;
 };
 typedef struct _virCgroupBackend virCgroupBackend;
 typedef virCgroupBackend *virCgroupBackendPtr;

src/util/vircgroupv1.c

@@ -1845,6 +1845,24 @@ virCgroupV1GetCpuCfsQuota(virCgroupPtr group,
 }
 
 
+static bool
+virCgroupV1SupportsCpuBW(virCgroupPtr cgroup)
+{
+    VIR_AUTOFREE(char *) path = NULL;
+
+    if (!cgroup)
+        return false;
+
+    if (virCgroupV1PathOfController(cgroup, VIR_CGROUP_CONTROLLER_CPU,
+                                    "cpu.cfs_period_us", &path) < 0) {
+        virResetLastError();
+        return false;
+    }
+
+    return virFileExists(path);
+}
+
+
 virCgroupBackend virCgroupV1Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V1,
 
@@ -1904,6 +1922,7 @@ virCgroupBackend virCgroupV1Backend = {
     .getCpuCfsPeriod = virCgroupV1GetCpuCfsPeriod,
     .setCpuCfsQuota = virCgroupV1SetCpuCfsQuota,
     .getCpuCfsQuota = virCgroupV1GetCpuCfsQuota,
+    .supportsCpuBW = virCgroupV1SupportsCpuBW,
 };