[libvirt] [PATCH 18/47] vircgroup: extract virCgroupV1HasEmptyTasks

[Pavel Hrdina]

Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
---
 src/util/vircgroup.c        | 13 +------------
 src/util/vircgroupbackend.h |  5 +++++
 src/util/vircgroupv1.c      | 20 ++++++++++++++++++++
 3 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 5dd736930b..f5ae23836f 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -3467,18 +3467,7 @@ virCgroupSupportsCpuBW(virCgroupPtr cgroup)
 int
 virCgroupHasEmptyTasks(virCgroupPtr cgroup, int controller)
 {
-    int ret = -1;
-    VIR_AUTOFREE(char *) content = NULL;
-
-    if (!cgroup)
-        return -1;
-
-    ret = virCgroupGetValueStr(cgroup, controller, "tasks", &content);
-
-    if (ret == 0 && content[0] == '\0')
-        ret = 1;
-
-    return ret;
+    return cgroup->backend->hasEmptyTasks(cgroup, controller);
 }
 
 bool
diff --git a/src/util/vircgroupbackend.h b/src/util/vircgroupbackend.h
index 4661d82132..1964a48ff0 100644
--- a/src/util/vircgroupbackend.h
+++ b/src/util/vircgroupbackend.h
@@ -114,6 +114,10 @@ typedef int
                       pid_t pid,
                       unsigned int flags);
 
+typedef int
+(*virCgroupHasEmptyTasksCB)(virCgroupPtr cgroup,
+                            int controller);
+
 struct _virCgroupBackend {
     virCgroupBackendType type;
 
@@ -133,6 +137,7 @@ struct _virCgroupBackend {
     virCgroupMakeGroupCB makeGroup;
     virCgroupRemoveCB remove;
     virCgroupAddTaskCB addTask;
+    virCgroupHasEmptyTasksCB hasEmptyTasks;
 };
 typedef struct _virCgroupBackend virCgroupBackend;
 typedef virCgroupBackend *virCgroupBackendPtr;
diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
index c9f6fd925a..57bcb6a685 100644
--- a/src/util/vircgroupv1.c
+++ b/src/util/vircgroupv1.c
@@ -735,6 +735,25 @@ virCgroupV1AddTask(virCgroupPtr group,
 }
 
 
+static int
+virCgroupV1HasEmptyTasks(virCgroupPtr cgroup,
+                         int controller)
+{
+    int ret = -1;
+    VIR_AUTOFREE(char *) content = NULL;
+
+    if (!cgroup)
+        return -1;
+
+    ret = virCgroupGetValueStr(cgroup, controller, "tasks", &content);
+
+    if (ret == 0 && content[0] == '\0')
+        ret = 1;
+
+    return ret;
+}
+
+
 virCgroupBackend virCgroupV1Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V1,
 
@@ -753,6 +772,7 @@ virCgroupBackend virCgroupV1Backend = {
     .makeGroup = virCgroupV1MakeGroup,
     .remove = virCgroupV1Remove,
     .addTask = virCgroupV1AddTask,
+    .hasEmptyTasks = virCgroupV1HasEmptyTasks,
 };
 
 
-- 
2.17.1