mirror of
https://github.com/chrislusf/seaweedfs
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118 lines
2.7 KiB
Go
118 lines
2.7 KiB
Go
package erasure_coding
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import (
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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)
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// data structure used in master
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type EcVolumeInfo struct {
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VolumeId needle.VolumeId
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Collection string
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ShardBits ShardBits
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DiskType string
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}
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func NewEcVolumeInfo(diskType string, collection string, vid needle.VolumeId, shardBits ShardBits) *EcVolumeInfo {
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return &EcVolumeInfo{
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Collection: collection,
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VolumeId: vid,
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ShardBits: shardBits,
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DiskType: diskType,
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}
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}
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func (ecInfo *EcVolumeInfo) AddShardId(id ShardId) {
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ecInfo.ShardBits = ecInfo.ShardBits.AddShardId(id)
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}
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func (ecInfo *EcVolumeInfo) RemoveShardId(id ShardId) {
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ecInfo.ShardBits = ecInfo.ShardBits.RemoveShardId(id)
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}
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func (ecInfo *EcVolumeInfo) HasShardId(id ShardId) bool {
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return ecInfo.ShardBits.HasShardId(id)
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}
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func (ecInfo *EcVolumeInfo) ShardIds() (ret []ShardId) {
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return ecInfo.ShardBits.ShardIds()
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}
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func (ecInfo *EcVolumeInfo) ShardIdCount() (count int) {
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return ecInfo.ShardBits.ShardIdCount()
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}
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func (ecInfo *EcVolumeInfo) Minus(other *EcVolumeInfo) *EcVolumeInfo {
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ret := &EcVolumeInfo{
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VolumeId: ecInfo.VolumeId,
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Collection: ecInfo.Collection,
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ShardBits: ecInfo.ShardBits.Minus(other.ShardBits),
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DiskType: ecInfo.DiskType,
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}
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return ret
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}
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func (ecInfo *EcVolumeInfo) ToVolumeEcShardInformationMessage() (ret *master_pb.VolumeEcShardInformationMessage) {
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return &master_pb.VolumeEcShardInformationMessage{
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Id: uint32(ecInfo.VolumeId),
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EcIndexBits: uint32(ecInfo.ShardBits),
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Collection: ecInfo.Collection,
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DiskType: ecInfo.DiskType,
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}
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}
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type ShardBits uint32 // use bits to indicate the shard id, use 32 bits just for possible future extension
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func (b ShardBits) AddShardId(id ShardId) ShardBits {
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return b | (1 << id)
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}
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func (b ShardBits) RemoveShardId(id ShardId) ShardBits {
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return b &^ (1 << id)
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}
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func (b ShardBits) HasShardId(id ShardId) bool {
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return b&(1<<id) > 0
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}
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func (b ShardBits) ShardIds() (ret []ShardId) {
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for i := ShardId(0); i < TotalShardsCount; i++ {
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if b.HasShardId(i) {
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ret = append(ret, i)
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}
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}
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return
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}
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func (b ShardBits) ToUint32Slice() (ret []uint32) {
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for i := uint32(0); i < TotalShardsCount; i++ {
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if b.HasShardId(ShardId(i)) {
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ret = append(ret, i)
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}
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}
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return
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}
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func (b ShardBits) ShardIdCount() (count int) {
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for count = 0; b > 0; count++ {
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b &= b - 1
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}
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return
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}
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func (b ShardBits) Minus(other ShardBits) ShardBits {
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return b &^ other
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}
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func (b ShardBits) Plus(other ShardBits) ShardBits {
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return b | other
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}
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func (b ShardBits) MinusParityShards() ShardBits {
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for i := DataShardsCount; i < TotalShardsCount; i++ {
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b = b.RemoveShardId(ShardId(i))
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}
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return b
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}
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