summaryrefslogtreecommitdiff
path: root/vendor/github.com/containerd/cgroups/rdma.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/github.com/containerd/cgroups/rdma.go')
-rw-r--r--vendor/github.com/containerd/cgroups/rdma.go153
1 files changed, 153 insertions, 0 deletions
diff --git a/vendor/github.com/containerd/cgroups/rdma.go b/vendor/github.com/containerd/cgroups/rdma.go
new file mode 100644
index 000000000..4f423d33a
--- /dev/null
+++ b/vendor/github.com/containerd/cgroups/rdma.go
@@ -0,0 +1,153 @@
+/*
+ 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"
+ "math"
+ "os"
+ "path/filepath"
+ "strconv"
+ "strings"
+
+ specs "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+type rdmaController struct {
+ root string
+}
+
+func (p *rdmaController) Name() Name {
+ return Rdma
+}
+
+func (p *rdmaController) Path(path string) string {
+ return filepath.Join(p.root, path)
+}
+
+func NewRdma(root string) *rdmaController {
+ return &rdmaController{
+ root: filepath.Join(root, string(Rdma)),
+ }
+}
+
+func createCmdString(device string, limits *specs.LinuxRdma) string {
+ var cmdString string
+
+ cmdString = device
+ if limits.HcaHandles != nil {
+ cmdString = cmdString + " " + "hca_handle=" + strconv.FormatUint(uint64(*limits.HcaHandles), 10)
+ }
+
+ if limits.HcaObjects != nil {
+ cmdString = cmdString + " " + "hca_object=" + strconv.FormatUint(uint64(*limits.HcaObjects), 10)
+ }
+ return cmdString
+}
+
+func (p *rdmaController) Create(path string, resources *specs.LinuxResources) error {
+ if err := os.MkdirAll(p.Path(path), defaultDirPerm); err != nil {
+ return err
+ }
+
+ for device, limit := range resources.Rdma {
+ if device != "" && (limit.HcaHandles != nil || limit.HcaObjects != nil) {
+ return ioutil.WriteFile(
+ filepath.Join(p.Path(path), "rdma.max"),
+ []byte(createCmdString(device, &limit)),
+ defaultFilePerm,
+ )
+ }
+ }
+ return nil
+}
+
+func (p *rdmaController) Update(path string, resources *specs.LinuxResources) error {
+ return p.Create(path, resources)
+}
+
+func parseRdmaKV(raw string, entry *RdmaEntry) {
+ var value uint64
+ var err error
+
+ parts := strings.Split(raw, "=")
+ switch len(parts) {
+ case 2:
+ if parts[1] == "max" {
+ value = math.MaxUint32
+ } else {
+ value, err = parseUint(parts[1], 10, 32)
+ if err != nil {
+ return
+ }
+ }
+ if parts[0] == "hca_handle" {
+ entry.HcaHandles = uint32(value)
+ } else if parts[0] == "hca_object" {
+ entry.HcaObjects = uint32(value)
+ }
+ }
+}
+
+func toRdmaEntry(strEntries []string) []*RdmaEntry {
+ var rdmaEntries []*RdmaEntry
+ for i := range strEntries {
+ parts := strings.Fields(strEntries[i])
+ switch len(parts) {
+ case 3:
+ entry := new(RdmaEntry)
+ entry.Device = parts[0]
+ parseRdmaKV(parts[1], entry)
+ parseRdmaKV(parts[2], entry)
+
+ rdmaEntries = append(rdmaEntries, entry)
+ default:
+ continue
+ }
+ }
+ return rdmaEntries
+}
+
+func (p *rdmaController) Stat(path string, stats *Metrics) error {
+
+ currentData, err := ioutil.ReadFile(filepath.Join(p.Path(path), "rdma.current"))
+ if err != nil {
+ return err
+ }
+ currentPerDevices := strings.Split(string(currentData), "\n")
+
+ maxData, err := ioutil.ReadFile(filepath.Join(p.Path(path), "rdma.max"))
+ if err != nil {
+ return err
+ }
+ maxPerDevices := strings.Split(string(maxData), "\n")
+
+ // If device got removed between reading two files, ignore returning
+ // stats.
+ if len(currentPerDevices) != len(maxPerDevices) {
+ return nil
+ }
+
+ currentEntries := toRdmaEntry(currentPerDevices)
+ maxEntries := toRdmaEntry(maxPerDevices)
+
+ stats.Rdma = &RdmaStat{
+ Current: currentEntries,
+ Limit: maxEntries,
+ }
+ return nil
+}