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Copy pathmanager_ringbuffer.go
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manager_ringbuffer.go
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package manager
import "github.com/cilium/ebpf"
// NewRingBuffer - Creates a new ring buffer and start listening for events.
// Use a MapRoute to make this map available to the programs of the manager.
func (m *Manager) NewRingBuffer(spec *ebpf.MapSpec, options MapOptions, ringBufferOptions RingBufferOptions) (*ebpf.Map, error) {
m.stateLock.Lock()
defer m.stateLock.Unlock()
if m.state < initialized {
return nil, ErrManagerNotInitialized
}
// check if the name of the new map is available
_, exists, _ := m.getMap(spec.Name)
if exists {
return nil, ErrMapNameInUse
}
// Create new map and ring buffer reader
ringBuffer, err := loadNewRingBuffer(spec, options, ringBufferOptions)
if err != nil {
return nil, err
}
// Setup ring buffer reader
if err := ringBuffer.init(m); err != nil {
return nil, err
}
// Start perf buffer reader
if err := ringBuffer.Start(); err != nil {
// clean up
_ = ringBuffer.Stop(CleanInternal)
return nil, err
}
// Add map to the list of perf ring managed by the manager
m.RingBuffers = append(m.RingBuffers, ringBuffer)
return ringBuffer.array, nil
}