package basicfs import ( "context" "os" "path/filepath" "sync" "github.com/filecoin-project/specs-actors/actors/abi" "github.com/filecoin-project/sector-storage/stores" "github.com/filecoin-project/sector-storage/storiface" ) type sectorFile struct { abi.SectorID stores.SectorFileType } type Provider struct { Root string lk sync.Mutex waitSector map[sectorFile]chan struct{} } func (b *Provider) AcquireSector(ctx context.Context, id abi.SectorID, existing stores.SectorFileType, allocate stores.SectorFileType, sealing bool) (stores.SectorPaths, func(), error) { if err := os.Mkdir(filepath.Join(b.Root, stores.FTUnsealed.String()), 0755); err != nil && !os.IsExist(err) { return stores.SectorPaths{}, nil, err } if err := os.Mkdir(filepath.Join(b.Root, stores.FTSealed.String()), 0755); err != nil && !os.IsExist(err) { return stores.SectorPaths{}, nil, err } if err := os.Mkdir(filepath.Join(b.Root, stores.FTCache.String()), 0755); err != nil && !os.IsExist(err) { return stores.SectorPaths{}, nil, err } done := func() {} out := stores.SectorPaths{ Id: id, } for _, fileType := range stores.PathTypes { if !existing.Has(fileType) && !allocate.Has(fileType) { continue } b.lk.Lock() if b.waitSector == nil { b.waitSector = map[sectorFile]chan struct{}{} } ch, found := b.waitSector[sectorFile{id, fileType}] if !found { ch = make(chan struct{}, 1) b.waitSector[sectorFile{id, fileType}] = ch } b.lk.Unlock() select { case ch <- struct{}{}: case <-ctx.Done(): done() return stores.SectorPaths{}, nil, ctx.Err() } path := filepath.Join(b.Root, fileType.String(), stores.SectorName(id)) prevDone := done done = func() { prevDone() <-ch } if !allocate.Has(fileType) { if _, err := os.Stat(path); os.IsNotExist(err) { done() return stores.SectorPaths{}, nil, storiface.ErrSectorNotFound } } stores.SetPathByType(&out, fileType, path) } return out, done, nil }