lotus/extern/sector-storage/roprov.go

41 lines
1.2 KiB
Go

package sectorstorage
import (
"context"
"golang.org/x/xerrors"
"github.com/filecoin-project/specs-storage/storage"
"github.com/filecoin-project/lotus/extern/sector-storage/stores"
"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
)
type readonlyProvider struct {
index stores.SectorIndex
stor *stores.Local
}
func (l *readonlyProvider) AcquireSector(ctx context.Context, id storage.SectorRef, existing storiface.SectorFileType, allocate storiface.SectorFileType, sealing storiface.PathType) (storiface.SectorPaths, func(), error) {
if allocate != storiface.FTNone {
return storiface.SectorPaths{}, nil, xerrors.New("read-only storage")
}
ctx, cancel := context.WithCancel(ctx)
// use TryLock to avoid blocking
locked, err := l.index.StorageTryLock(ctx, id.ID, existing, storiface.FTNone)
if err != nil {
cancel()
return storiface.SectorPaths{}, nil, xerrors.Errorf("acquiring sector lock: %w", err)
}
if !locked {
cancel()
return storiface.SectorPaths{}, nil, xerrors.Errorf("failed to acquire sector lock")
}
p, _, err := l.stor.AcquireSector(ctx, id, existing, allocate, sealing, storiface.AcquireMove)
return p, cancel, err
}