/
client_blockstore.go
102 lines (84 loc) · 2.4 KB
/
client_blockstore.go
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package storageadapter
import (
"sync"
blockstore "github.com/ipfs/boxo/blockstore"
"github.com/ipfs/go-cid"
"golang.org/x/xerrors"
"github.com/filecoin-project/boost-gfm/storagemarket"
"github.com/filecoin-project/boost-gfm/stores"
"github.com/filecoin-project/lotus/node/repo/imports"
)
// ProxyBlockstoreAccessor is an accessor that returns a fixed blockstore.
// To be used in combination with IPFS integration.
type ProxyBlockstoreAccessor struct {
Blockstore blockstore.Blockstore
}
var _ storagemarket.BlockstoreAccessor = (*ProxyBlockstoreAccessor)(nil)
func NewFixedBlockstoreAccessor(bs blockstore.Blockstore) storagemarket.BlockstoreAccessor {
return &ProxyBlockstoreAccessor{Blockstore: bs}
}
func (p *ProxyBlockstoreAccessor) Get(cid storagemarket.PayloadCID) (blockstore.Blockstore, error) {
return p.Blockstore, nil
}
func (p *ProxyBlockstoreAccessor) Done(cid storagemarket.PayloadCID) error {
return nil
}
// ImportsBlockstoreAccessor is a blockstore accessor backed by the
// imports.Manager.
type ImportsBlockstoreAccessor struct {
m *imports.Manager
lk sync.Mutex
open map[cid.Cid]struct {
st stores.ClosableBlockstore
refs int
}
}
var _ storagemarket.BlockstoreAccessor = (*ImportsBlockstoreAccessor)(nil)
func NewImportsBlockstoreAccessor(importmgr *imports.Manager) *ImportsBlockstoreAccessor {
return &ImportsBlockstoreAccessor{
m: importmgr,
open: make(map[cid.Cid]struct {
st stores.ClosableBlockstore
refs int
}),
}
}
func (s *ImportsBlockstoreAccessor) Get(payloadCID storagemarket.PayloadCID) (blockstore.Blockstore, error) {
s.lk.Lock()
defer s.lk.Unlock()
e, ok := s.open[payloadCID]
if ok {
e.refs++
return e.st, nil
}
path, err := s.m.CARPathFor(payloadCID)
if err != nil {
return nil, xerrors.Errorf("failed to get client blockstore for root %s: %w", payloadCID, err)
}
if path == "" {
return nil, xerrors.Errorf("no client blockstore for root %s", payloadCID)
}
ret, err := stores.ReadOnlyFilestore(path)
if err != nil {
return nil, err
}
e.st = ret
s.open[payloadCID] = e
return ret, nil
}
func (s *ImportsBlockstoreAccessor) Done(payloadCID storagemarket.PayloadCID) error {
s.lk.Lock()
defer s.lk.Unlock()
e, ok := s.open[payloadCID]
if !ok {
return nil
}
e.refs--
if e.refs == 0 {
if err := e.st.Close(); err != nil {
log.Warnf("failed to close blockstore: %s", err)
}
delete(s.open, payloadCID)
}
return nil
}