lotus/ffiwrapper/unseal_ranges.go
2020-05-29 01:33:00 +02:00

27 lines
846 B
Go

package ffiwrapper
import (
"golang.org/x/xerrors"
"github.com/filecoin-project/go-bitfield/rle"
"github.com/filecoin-project/specs-actors/actors/abi"
"github.com/filecoin-project/sector-storage/storiface"
)
// merge gaps between ranges which are close to each other
// TODO: more benchmarking to come up with more optimal number
const mergeGaps = 32 << 20
// TODO const expandRuns = 16 << 20 // unseal more than requested for future requests
func computeUnsealRanges(unsealed rlepluslazy.RunIterator, offset storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize) (rlepluslazy.RunIterator, error) {
todo := pieceRun(offset.Padded(), size.Padded())
todo, err := rlepluslazy.Subtract(todo, unsealed)
if err != nil {
return nil, xerrors.Errorf("compute todo-unsealed: %w", err)
}
return rlepluslazy.JoinClose(todo, mergeGaps)
}