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package network
import (
"os"
"path/filepath"
"github.com/containers/common/pkg/config"
"github.com/containers/storage"
)
// acquireCNILock gets a lock that should be used in create and
// delete cases to avoid unwanted collisions in network names.
// TODO this uses a file lock and should be converted to shared memory
// when we have a more general shared memory lock in libpod
func acquireCNILock(config *config.Config) (*CNILock, error) {
cniDir := GetCNIConfDir(config)
err := os.MkdirAll(cniDir, 0755)
if err != nil {
return nil, err
}
l, err := storage.GetLockfile(filepath.Join(cniDir, LockFileName))
if err != nil {
return nil, err
}
l.Lock()
cnilock := CNILock{
Locker: l,
}
return &cnilock, nil
}
// ReleaseCNILock unlocks the previously held lock
func (l *CNILock) releaseCNILock() {
l.Unlock()
}
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