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libcontainer/configs/validate: check that intelrdt is enabled #4829

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Merged
rata merged 1 commit into from
Aug 5, 2025
Merged

libcontainer/configs/validate: check that intelrdt is enabled #4829

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4 changes: 4 additions & 0 deletions libcontainer/configs/validate/validator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -283,6 +283,10 @@ func sysctl(config *configs.Config) error {

func intelrdtCheck(config *configs.Config) error {
if config.IntelRdt != nil {
if !intelrdt.IsEnabled() {
return fmt.Errorf("intelRdt is specified in config, but Intel RDT is not enabled")
}

if config.IntelRdt.ClosID == "." || config.IntelRdt.ClosID == ".." || strings.Contains(config.IntelRdt.ClosID, "/") {
return fmt.Errorf("invalid intelRdt.ClosID %q", config.IntelRdt.ClosID)
}
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6 changes: 6 additions & 0 deletions libcontainer/intelrdt/intelrdt.go
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Expand Up @@ -416,6 +416,12 @@ func WriteIntelRdtTasks(dir string, pid int) error {
return nil
}

// IsEnabled checks if Intel RDT is enabled.
func IsEnabled() bool {
fsroot, err := Root()
return err == nil && fsroot != ""
}

// IsCATEnabled checks if Intel RDT/CAT is enabled.
func IsCATEnabled() bool {
featuresInit()
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