seaweedfs/weed/storage/erasure_coding/ec_volume_info.go

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package erasure_coding
import (
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
)
// data structure used in master
type EcVolumeInfo struct {
VolumeId needle.VolumeId
Collection string
shardIds uint16 // use bits to indicate the shard id
}
func (ecInfo *EcVolumeInfo) AddShardId(id ShardId) {
ecInfo.shardIds |= (1 << id)
}
func (ecInfo *EcVolumeInfo) RemoveShardId(id ShardId) {
ecInfo.shardIds &^= (1 << id)
}
func (ecInfo *EcVolumeInfo) HasShardId(id ShardId) bool {
return ecInfo.shardIds&(1<<id) > 0
}
func (ecInfo *EcVolumeInfo) ShardIds() (ret []ShardId) {
for i := ShardId(0); i < DataShardsCount+ParityShardsCount; i++ {
if ecInfo.HasShardId(i) {
ret = append(ret, i)
}
}
return
}
func (ecInfo *EcVolumeInfo) ToVolumeEcShardInformationMessage() (ret []*master_pb.VolumeEcShardInformationMessage) {
for _, shard := range ecInfo.ShardIds() {
ret = append(ret, &master_pb.VolumeEcShardInformationMessage{
Id: uint32(ecInfo.VolumeId),
EcIndex: uint32(shard),
Collection: ecInfo.Collection,
})
}
return
}