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