| /* |
| 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 |
| } |