103 lines
2.4 KiB
Go
103 lines
2.4 KiB
Go
package storageadapter
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import (
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"sync"
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"github.com/ipfs/go-cid"
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blockstore "github.com/ipfs/go-ipfs-blockstore"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-fil-markets/storagemarket"
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"github.com/filecoin-project/go-fil-markets/stores"
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"github.com/filecoin-project/lotus/node/repo/imports"
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)
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// ProxyBlockstoreAccessor is an accessor that returns a fixed blockstore.
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// To be used in combination with IPFS integration.
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type ProxyBlockstoreAccessor struct {
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Blockstore blockstore.Blockstore
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}
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var _ storagemarket.BlockstoreAccessor = (*ProxyBlockstoreAccessor)(nil)
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func NewFixedBlockstoreAccessor(bs blockstore.Blockstore) storagemarket.BlockstoreAccessor {
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return &ProxyBlockstoreAccessor{Blockstore: bs}
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}
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func (p *ProxyBlockstoreAccessor) Get(cid storagemarket.PayloadCID) (blockstore.Blockstore, error) {
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return p.Blockstore, nil
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}
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func (p *ProxyBlockstoreAccessor) Done(cid storagemarket.PayloadCID) error {
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return nil
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}
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// ImportsBlockstoreAccessor is a blockstore accessor backed by the
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// imports.Manager.
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type ImportsBlockstoreAccessor struct {
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m *imports.Manager
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lk sync.Mutex
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open map[cid.Cid]struct {
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st stores.ClosableBlockstore
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refs int
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}
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}
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var _ storagemarket.BlockstoreAccessor = (*ImportsBlockstoreAccessor)(nil)
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func NewImportsBlockstoreAccessor(importmgr *imports.Manager) *ImportsBlockstoreAccessor {
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return &ImportsBlockstoreAccessor{
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m: importmgr,
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open: make(map[cid.Cid]struct {
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st stores.ClosableBlockstore
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refs int
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}),
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}
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}
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func (s *ImportsBlockstoreAccessor) Get(payloadCID storagemarket.PayloadCID) (blockstore.Blockstore, error) {
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s.lk.Lock()
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defer s.lk.Unlock()
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e, ok := s.open[payloadCID]
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if ok {
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e.refs++
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return e.st, nil
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}
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path, err := s.m.CARPathFor(payloadCID)
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if err != nil {
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return nil, xerrors.Errorf("failed to get client blockstore for root %s: %w", payloadCID, err)
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}
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if path == "" {
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return nil, xerrors.Errorf("no client blockstore for root %s", payloadCID)
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}
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ret, err := stores.ReadOnlyFilestore(path)
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if err != nil {
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return nil, err
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}
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e.st = ret
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s.open[payloadCID] = e
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return ret, nil
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}
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func (s *ImportsBlockstoreAccessor) Done(payloadCID storagemarket.PayloadCID) error {
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s.lk.Lock()
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defer s.lk.Unlock()
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e, ok := s.open[payloadCID]
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if !ok {
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return nil
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}
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e.refs--
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if e.refs == 0 {
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if err := e.st.Close(); err != nil {
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log.Warnf("failed to close blockstore: %s", err)
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}
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delete(s.open, payloadCID)
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}
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return nil
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}
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