1 files changed, 109 insertions, 0 deletions
diff --git a/vendor/github.com/containerd/cgroups/hugetlb.go b/vendor/github.com/containerd/cgroups/hugetlb.go
new file mode 100644
index 000000000..3718706d7
--- /dev/null
+++ b/vendor/github.com/containerd/cgroups/hugetlb.go
@@ -0,0 +1,109 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package cgroups
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	specs "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+func NewHugetlb(root string) (*hugetlbController, error) {
+	sizes, err := hugePageSizes()
+	if err != nil {
+		return nil, err
+	}
+
+	return &hugetlbController{
+		root:  filepath.Join(root, string(Hugetlb)),
+		sizes: sizes,
+	}, nil
+}
+
+type hugetlbController struct {
+	root  string
+	sizes []string
+}
+
+func (h *hugetlbController) Name() Name {
+	return Hugetlb
+}
+
+func (h *hugetlbController) Path(path string) string {
+	return filepath.Join(h.root, path)
+}
+
+func (h *hugetlbController) Create(path string, resources *specs.LinuxResources) error {
+	if err := os.MkdirAll(h.Path(path), defaultDirPerm); err != nil {
+		return err
+	}
+	for _, limit := range resources.HugepageLimits {
+		if err := ioutil.WriteFile(
+			filepath.Join(h.Path(path), strings.Join([]string{"hugetlb", limit.Pagesize, "limit_in_bytes"}, ".")),
+			[]byte(strconv.FormatUint(limit.Limit, 10)),
+			defaultFilePerm,
+		); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (h *hugetlbController) Stat(path string, stats *Metrics) error {
+	for _, size := range h.sizes {
+		s, err := h.readSizeStat(path, size)
+		if err != nil {
+			return err
+		}
+		stats.Hugetlb = append(stats.Hugetlb, s)
+	}
+	return nil
+}
+
+func (h *hugetlbController) readSizeStat(path, size string) (*HugetlbStat, error) {
+	s := HugetlbStat{
+		Pagesize: size,
+	}
+	for _, t := range []struct {
+		name  string
+		value *uint64
+	}{
+		{
+			name:  "usage_in_bytes",
+			value: &s.Usage,
+		},
+		{
+			name:  "max_usage_in_bytes",
+			value: &s.Max,
+		},
+		{
+			name:  "failcnt",
+			value: &s.Failcnt,
+		},
+	} {
+		v, err := readUint(filepath.Join(h.Path(path), strings.Join([]string{"hugetlb", size, t.name}, ".")))
+		if err != nil {
+			return nil, err
+		}
+		*t.value = v
+	}
+	return &s, nil
+}