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fix: uniqMcs use all cpu #245

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ningmingxiao wants to merge 1 commit into from
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fix: uniqMcs use all cpu #245

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29 changes: 26 additions & 3 deletions go-selinux/selinux_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,13 +39,15 @@ const (

type selinuxState struct {
mcsList map[string]bool
cond *sync.Cond
selinuxfs string
maxMCSCount int
selinuxfsOnce sync.Once
enabledSet bool
enabled bool
mu sync.Mutex
sync.Mutex
enabledSet bool
enabled bool
}

type level struct {
cats *big.Int
sens int
Expand Down Expand Up @@ -936,6 +938,18 @@ func mcsAdd(mcs string) error {
if mcs == "" {
return nil
}
state.mu.Lock()
if state.maxMCSCount == 0 {
state.maxMCSCount = int(CategoryRange * (CategoryRange - 1) / 2)
}
if state.cond == nil {
state.cond = sync.NewCond(&state.mu)
}
if getMcsListSize() >= state.maxMCSCount {
state.cond.Wait()
}
state.mu.Unlock()

state.Lock()
defer state.Unlock()
if state.mcsList[mcs] {
Expand All @@ -945,13 +959,22 @@ func mcsAdd(mcs string) error {
return nil
}

func getMcsListSize() int {
state.Lock()
defer state.Unlock()
return len(state.mcsList)
}

func mcsDelete(mcs string) {
if mcs == "" {
return
}
state.Lock()
defer state.Unlock()
state.mcsList[mcs] = false
state.mu.Lock()
state.cond.Signal()
state.mu.Unlock()
}

func intToMcs(id int, catRange uint32) string {
Expand Down