[libvirt] [PATCH v2 37/53] [ACKED] vircgroup: introduce virCgroupV2(Set|Get)CpuCfsQuota
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroupv2.c | 52 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index 24c5bb3e3d..26fdb46098 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -1399,6 +1399,56 @@ virCgroupV2GetCpuCfsPeriod(virCgroupPtr group,
}
+static int
+virCgroupV2SetCpuCfsQuota(virCgroupPtr group,
+ long long cfs_quota)
+{
+ /* The cfs_quota should be greater or equal than 1ms */
+ if (cfs_quota >= 0 &&
+ (cfs_quota < 1000 ||
+ cfs_quota > ULLONG_MAX / 1000)) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("cfs_quota '%lld' must be in range (1000,
%llu)"),
+ cfs_quota, ULLONG_MAX / 1000);
+ return -1;
+ }
+
+ if (cfs_quota == ULLONG_MAX / 1000) {
+ return virCgroupSetValueStr(group,
+ VIR_CGROUP_CONTROLLER_CPU,
+ "cpu.max", "max");
+ }
+
+ return virCgroupSetValueI64(group,
+ VIR_CGROUP_CONTROLLER_CPU,
+ "cpu.max", cfs_quota);
+}
+
+
+static int
+virCgroupV2GetCpuCfsQuota(virCgroupPtr group,
+ long long *cfs_quota)
+{
+ VIR_AUTOFREE(char *) str = NULL;
+
+ if (virCgroupGetValueStr(group, VIR_CGROUP_CONTROLLER_CPU,
+ "cpu.max", &str) < 0) {
+ return -1;
+ }
+
+ if (STREQLEN(str, "max", 3))
+ *cfs_quota = ULLONG_MAX / 1000;
+
+ if (virStrToLong_ll(str, NULL, 10, cfs_quota) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Failed to parse value '%s' from cpu.max."),
str);
+ return -1;
+ }
+
+ return 0;
+}
+
+
virCgroupBackend virCgroupV2Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V2,
@@ -1451,6 +1501,8 @@ virCgroupBackend virCgroupV2Backend = {
.getCpuShares = virCgroupV2GetCpuShares,
.setCpuCfsPeriod = virCgroupV2SetCpuCfsPeriod,
.getCpuCfsPeriod = virCgroupV2GetCpuCfsPeriod,
+ .setCpuCfsQuota = virCgroupV2SetCpuCfsQuota,
+ .getCpuCfsQuota = virCgroupV2GetCpuCfsQuota,
};
--
2.17.1