From 3f728c720b782e853de4c43999a37aeceb3f95b8 Mon Sep 17 00:00:00 2001
From: Pavel Hrdina <phrdina@redhat.com>
Date: Fri, 17 Aug 2018 16:57:52 +0200
Subject: [PATCH] vircgroup: introduce virCgroupV2GetMemSwapUsage

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
---
 src/util/vircgroupv2.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index 7509b57fac..56e02ebd2b 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -1289,6 +1289,21 @@ virCgroupV2GetMemSwapHardLimit(virCgroupPtr group,
 }
 
 
+static int
+virCgroupV2GetMemSwapUsage(virCgroupPtr group,
+                           unsigned long long *kb)
+{
+    unsigned long long usage_in_bytes;
+    int ret;
+    ret = virCgroupGetValueU64(group,
+                               VIR_CGROUP_CONTROLLER_MEMORY,
+                               "memory.swap.current", &usage_in_bytes);
+    if (ret == 0)
+        *kb = (unsigned long) usage_in_bytes >> 10;
+    return ret;
+}
+
+
 virCgroupBackend virCgroupV2Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V2,
 
@@ -1335,6 +1350,7 @@ virCgroupBackend virCgroupV2Backend = {
     .getMemorySoftLimit = virCgroupV2GetMemorySoftLimit,
     .setMemSwapHardLimit = virCgroupV2SetMemSwapHardLimit,
     .getMemSwapHardLimit = virCgroupV2GetMemSwapHardLimit,
+    .getMemSwapUsage = virCgroupV2GetMemSwapUsage,
 };