From ba7babc00b91a08c7c62858b6c34f1f0c77af0ce Mon Sep 17 00:00:00 2001

Message-Id: <ba7babc00b91a08c7c62858b6c34f1f0c77af0ce@dist-git>

From: Pavel Hrdina <phrdina@redhat.com>

Date: Mon, 1 Jul 2019 17:07:31 +0200

Subject: [PATCH] vircgroup: introduce virCgroupV2(Set|Get)BlkioWeight

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

(cherry picked from commit 11bb7f1561be311b71f3899332dfabe61c55a793)

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

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

Message-Id: <8e485d7c092d35f80e10da00af74fd30554b43bf.1561993100.git.phrdina@redhat.com>

Reviewed-by: Ján Tomko <jtomko@redhat.com>

---

 src/util/vircgroupv2.c | 49 ++++++++++++++++++++++++++++++++++++++++++

 1 file changed, 49 insertions(+)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c

index 27519d80e3..f7863a5690 100644

--- a/src/util/vircgroupv2.c

+++ b/src/util/vircgroupv2.c

@@ -521,6 +521,52 @@ virCgroupV2SetOwner(virCgroupPtr cgroup,

 }

+static int

+virCgroupV2SetBlkioWeight(virCgroupPtr group,

+                          unsigned int weight)

+{

+    VIR_AUTOFREE(char *) value = NULL;

+

+    if (virAsprintf(&value, "default %u", weight) < 0)

+        return -1;

+

+    return virCgroupSetValueStr(group,

+                                VIR_CGROUP_CONTROLLER_BLKIO,

+                                "io.weight",

+                                value);

+}

+

+

+static int

+virCgroupV2GetBlkioWeight(virCgroupPtr group,

+                          unsigned int *weight)

+{

+    VIR_AUTOFREE(char *) value = NULL;

+    char *tmp;

+

+    if (virCgroupGetValueStr(group, VIR_CGROUP_CONTROLLER_BLKIO,

+                             "io.weight", &value) < 0) {

+        return -1;

+    }

+

+    if (!(tmp = strstr(value, "default "))) {

+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",

+                       _("Cannot find default io weight."));

+        return -1;

+    }

+    tmp += strlen("default ");

+

+    if (virStrToLong_ui(tmp, NULL, 10, weight) < 0) {

+        virReportError(VIR_ERR_INTERNAL_ERROR,

+                       _("Unable to parse '%s' as an integer"),

+                       tmp);

+        return -1;

+    }

+

+    return 0;

+}

+

+

 virCgroupBackend virCgroupV2Backend = {

     .type = VIR_CGROUP_BACKEND_TYPE_V2,

@@ -542,6 +588,9 @@ virCgroupBackend virCgroupV2Backend = {

     .hasEmptyTasks = virCgroupV2HasEmptyTasks,

     .bindMount = virCgroupV2BindMount,

     .setOwner = virCgroupV2SetOwner,

+

+    .setBlkioWeight = virCgroupV2SetBlkioWeight,

+    .getBlkioWeight = virCgroupV2GetBlkioWeight,

 };

-- 

2.22.0