156 lines
3.6 KiB
Go
156 lines
3.6 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cgroups
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import (
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"io/ioutil"
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"math"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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v1 "github.com/containerd/cgroups/stats/v1"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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type rdmaController struct {
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root string
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}
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func (p *rdmaController) Name() Name {
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return Rdma
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}
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func (p *rdmaController) Path(path string) string {
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return filepath.Join(p.root, path)
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}
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func NewRdma(root string) *rdmaController {
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return &rdmaController{
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root: filepath.Join(root, string(Rdma)),
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}
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}
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func createCmdString(device string, limits *specs.LinuxRdma) string {
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var cmdString string
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cmdString = device
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if limits.HcaHandles != nil {
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cmdString = cmdString + " " + "hca_handle=" + strconv.FormatUint(uint64(*limits.HcaHandles), 10)
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}
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if limits.HcaObjects != nil {
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cmdString = cmdString + " " + "hca_object=" + strconv.FormatUint(uint64(*limits.HcaObjects), 10)
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}
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return cmdString
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}
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func (p *rdmaController) Create(path string, resources *specs.LinuxResources) error {
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if err := os.MkdirAll(p.Path(path), defaultDirPerm); err != nil {
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return err
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}
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for device, limit := range resources.Rdma {
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if device != "" && (limit.HcaHandles != nil || limit.HcaObjects != nil) {
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limit := limit
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return retryingWriteFile(
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filepath.Join(p.Path(path), "rdma.max"),
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[]byte(createCmdString(device, &limit)),
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defaultFilePerm,
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)
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}
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}
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return nil
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}
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func (p *rdmaController) Update(path string, resources *specs.LinuxResources) error {
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return p.Create(path, resources)
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}
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func parseRdmaKV(raw string, entry *v1.RdmaEntry) {
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var value uint64
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var err error
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parts := strings.Split(raw, "=")
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switch len(parts) {
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case 2:
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if parts[1] == "max" {
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value = math.MaxUint32
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} else {
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value, err = parseUint(parts[1], 10, 32)
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if err != nil {
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return
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}
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}
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if parts[0] == "hca_handle" {
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entry.HcaHandles = uint32(value)
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} else if parts[0] == "hca_object" {
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entry.HcaObjects = uint32(value)
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}
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}
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}
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func toRdmaEntry(strEntries []string) []*v1.RdmaEntry {
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var rdmaEntries []*v1.RdmaEntry
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for i := range strEntries {
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parts := strings.Fields(strEntries[i])
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switch len(parts) {
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case 3:
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entry := new(v1.RdmaEntry)
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entry.Device = parts[0]
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parseRdmaKV(parts[1], entry)
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parseRdmaKV(parts[2], entry)
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rdmaEntries = append(rdmaEntries, entry)
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default:
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continue
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}
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}
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return rdmaEntries
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}
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func (p *rdmaController) Stat(path string, stats *v1.Metrics) error {
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currentData, err := ioutil.ReadFile(filepath.Join(p.Path(path), "rdma.current"))
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if err != nil {
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return err
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}
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currentPerDevices := strings.Split(string(currentData), "\n")
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maxData, err := ioutil.ReadFile(filepath.Join(p.Path(path), "rdma.max"))
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if err != nil {
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return err
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}
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maxPerDevices := strings.Split(string(maxData), "\n")
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// If device got removed between reading two files, ignore returning
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// stats.
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if len(currentPerDevices) != len(maxPerDevices) {
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return nil
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}
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currentEntries := toRdmaEntry(currentPerDevices)
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maxEntries := toRdmaEntry(maxPerDevices)
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stats.Rdma = &v1.RdmaStat{
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Current: currentEntries,
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Limit: maxEntries,
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}
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return nil
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}
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