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Signed-off-by: wangjianyu.wjy <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| Copyright 2022 The Koordinator 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 helper | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
| "sort" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/koordinator-sh/koordinator/pkg/koordlet/util/system" | ||
| ) | ||
|
|
||
| const ( | ||
| configuredVfFile = "sriov_numvfs" | ||
| ) | ||
|
|
||
| // SriovConfigured returns true if sriov_numvfs reads > 0 else false | ||
| func SriovConfigured(addr string) bool { | ||
| return GetVConfigured(addr) > 0 | ||
| } | ||
|
|
||
| func extractNumber(pfDir string, s string) int { | ||
| num, _ := strconv.Atoi(strings.TrimPrefix(s, fmt.Sprintf("%s/virtfn", pfDir))) | ||
| return num | ||
| } | ||
|
|
||
| // GetVFList returns a List containing PCI addr for all VF discovered in a given PF | ||
| func GetVFList(pf string) (vfList []string, err error) { | ||
| vfList = make([]string, 0) | ||
| pfDir := filepath.Join(system.GetPCIDeviceDir(), pf) | ||
| _, err = os.Lstat(pfDir) | ||
| if err != nil { | ||
| err = fmt.Errorf("error. Could not get PF directory information for device: %s, Err: %v", pf, err) | ||
| return | ||
| } | ||
|
|
||
| vfDirs, err := filepath.Glob(filepath.Join(pfDir, "virtfn*")) | ||
|
|
||
| if err != nil { | ||
| err = fmt.Errorf("error reading VF directories %v", err) | ||
| return | ||
| } | ||
| //TODO 排序 | ||
| sort.Slice(vfDirs, func(i, j int) bool { | ||
| return extractNumber(pfDir, vfDirs[i]) < extractNumber(pfDir, vfDirs[j]) | ||
| }) | ||
|
|
||
| // Read all VF directory and get add VF PCI addr to the vfList | ||
| for _, dir := range vfDirs { | ||
| dirInfo, err := os.Lstat(dir) | ||
| if err == nil && (dirInfo.Mode()&os.ModeSymlink != 0) { | ||
| linkName, err := filepath.EvalSymlinks(dir) | ||
| if err == nil { | ||
| vfLink := filepath.Base(linkName) | ||
| vfList = append(vfList, vfLink) | ||
| } | ||
| } | ||
| } | ||
| return | ||
| } | ||
|
|
||
| // GetVConfigured returns number of VF configured for a PF | ||
| func GetVConfigured(pf string) int { | ||
| configuredVfPath := filepath.Join(system.GetPCIDeviceDir(), pf, configuredVfFile) | ||
| vfs, err := os.ReadFile(configuredVfPath) | ||
| if err != nil { | ||
| return 0 | ||
| } | ||
| configuredVFs := bytes.TrimSpace(vfs) | ||
| numConfiguredVFs, err := strconv.Atoi(string(configuredVFs)) | ||
| if err != nil { | ||
| return 0 | ||
| } | ||
| return numConfiguredVFs | ||
| } | ||
|
|
||
| // IsSriovVF check if a pci device has link to a PF | ||
| func IsSriovVF(pciAddr string) bool { | ||
| totalVfFilePath := filepath.Join(system.GetPCIDeviceDir(), pciAddr, "physfn") | ||
| if _, err := os.Stat(totalVfFilePath); err != nil { | ||
| return false | ||
| } | ||
| return true | ||
| } |
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