From 40a3ab5f35bb847ae210160b5bcb2b3ab8990e5a Mon Sep 17 00:00:00 2001
Message-Id: <40a3ab5f35bb847ae210160b5bcb2b3ab8990e5a@dist-git>
From: Pavel Hrdina <phrdina@redhat.com>
Date: Mon, 1 Jul 2019 17:07:28 +0200
Subject: [PATCH] vircgroup: introduce virCgroupV2HasEmptyTasks
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
(cherry picked from commit 38411bb831a8c5086145b9781168349bc64fbc25)

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1689297

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Message-Id: <36bb2bd62faa6528de46da822d026f67be9f6d16.1561993100.git.phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
 src/util/vircgroupv2.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index 6ffb5ce786..074e6ec110 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -446,6 +446,22 @@ virCgroupV2AddTask(virCgroupPtr group,
 }
 
 
+static int
+virCgroupV2HasEmptyTasks(virCgroupPtr cgroup,
+                         int controller)
+{
+    int ret = -1;
+    VIR_AUTOFREE(char *) content = NULL;
+
+    ret = virCgroupGetValueStr(cgroup, controller, "cgroup.procs", &content);
+
+    if (ret == 0 && content[0] == '\0')
+        ret = 1;
+
+    return ret;
+}
+
+
 virCgroupBackend virCgroupV2Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V2,
 
@@ -464,6 +480,7 @@ virCgroupBackend virCgroupV2Backend = {
     .makeGroup = virCgroupV2MakeGroup,
     .remove = virCgroupV2Remove,
     .addTask = virCgroupV2AddTask,
+    .hasEmptyTasks = virCgroupV2HasEmptyTasks,
 };
 
 
-- 
2.22.0