[libvirt] [PATCH v2 20/53] [ACKED] vircgroup: introduce virCgroupV2(Set|Get)BlkioWeight
Signed-off-by: Pavel Hrdina <phrdina(a)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 976e5e449b..d10d691858 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -529,6 +529,52 @@ 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,
@@ -550,6 +596,9 @@ virCgroupBackend virCgroupV2Backend = {
.hasEmptyTasks = virCgroupV2HasEmptyTasks,
.bindMount = virCgroupV2BindMount,
.setOwner = virCgroupV2SetOwner,
+
+ .setBlkioWeight = virCgroupV2SetBlkioWeight,
+ .getBlkioWeight = virCgroupV2GetBlkioWeight,
};
--
2.17.1