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