bstore: Network blockstore

This commit is contained in:
Łukasz Magiera 2022-10-28 12:03:39 +01:00
parent 4ffded6fef
commit 1577740bc4
6 changed files with 1312 additions and 0 deletions

441
blockstore/cbor_gen.go Normal file
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@ -0,0 +1,441 @@
// Code generated by github.com/whyrusleeping/cbor-gen. DO NOT EDIT.
package blockstore
import (
"fmt"
"io"
"math"
"sort"
cid "github.com/ipfs/go-cid"
cbg "github.com/whyrusleeping/cbor-gen"
xerrors "golang.org/x/xerrors"
)
var _ = xerrors.Errorf
var _ = cid.Undef
var _ = math.E
var _ = sort.Sort
var lengthBufNetRpcReq = []byte{132}
func (t *NetRpcReq) MarshalCBOR(w io.Writer) error {
if t == nil {
_, err := w.Write(cbg.CborNull)
return err
}
cw := cbg.NewCborWriter(w)
if _, err := cw.Write(lengthBufNetRpcReq); err != nil {
return err
}
// t.Type (blockstore.NetRPCReqType) (uint8)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.Type)); err != nil {
return err
}
// t.ID (uint64) (uint64)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.ID)); err != nil {
return err
}
// t.Cid ([]cid.Cid) (slice)
if len(t.Cid) > cbg.MaxLength {
return xerrors.Errorf("Slice value in field t.Cid was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajArray, uint64(len(t.Cid))); err != nil {
return err
}
for _, v := range t.Cid {
if err := cbg.WriteCid(w, v); err != nil {
return xerrors.Errorf("failed writing cid field t.Cid: %w", err)
}
}
// t.Data ([][]uint8) (slice)
if len(t.Data) > cbg.MaxLength {
return xerrors.Errorf("Slice value in field t.Data was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajArray, uint64(len(t.Data))); err != nil {
return err
}
for _, v := range t.Data {
if len(v) > cbg.ByteArrayMaxLen {
return xerrors.Errorf("Byte array in field v was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(v))); err != nil {
return err
}
if _, err := cw.Write(v[:]); err != nil {
return err
}
}
return nil
}
func (t *NetRpcReq) UnmarshalCBOR(r io.Reader) (err error) {
*t = NetRpcReq{}
cr := cbg.NewCborReader(r)
maj, extra, err := cr.ReadHeader()
if err != nil {
return err
}
defer func() {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
}()
if maj != cbg.MajArray {
return fmt.Errorf("cbor input should be of type array")
}
if extra != 4 {
return fmt.Errorf("cbor input had wrong number of fields")
}
// t.Type (blockstore.NetRPCReqType) (uint8)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint8 field")
}
if extra > math.MaxUint8 {
return fmt.Errorf("integer in input was too large for uint8 field")
}
t.Type = NetRPCReqType(extra)
// t.ID (uint64) (uint64)
{
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint64 field")
}
t.ID = uint64(extra)
}
// t.Cid ([]cid.Cid) (slice)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.MaxLength {
return fmt.Errorf("t.Cid: array too large (%d)", extra)
}
if maj != cbg.MajArray {
return fmt.Errorf("expected cbor array")
}
if extra > 0 {
t.Cid = make([]cid.Cid, extra)
}
for i := 0; i < int(extra); i++ {
c, err := cbg.ReadCid(cr)
if err != nil {
return xerrors.Errorf("reading cid field t.Cid failed: %w", err)
}
t.Cid[i] = c
}
// t.Data ([][]uint8) (slice)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.MaxLength {
return fmt.Errorf("t.Data: array too large (%d)", extra)
}
if maj != cbg.MajArray {
return fmt.Errorf("expected cbor array")
}
if extra > 0 {
t.Data = make([][]uint8, extra)
}
for i := 0; i < int(extra); i++ {
{
var maj byte
var extra uint64
var err error
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.ByteArrayMaxLen {
return fmt.Errorf("t.Data[i]: byte array too large (%d)", extra)
}
if maj != cbg.MajByteString {
return fmt.Errorf("expected byte array")
}
if extra > 0 {
t.Data[i] = make([]uint8, extra)
}
if _, err := io.ReadFull(cr, t.Data[i][:]); err != nil {
return err
}
}
}
return nil
}
var lengthBufNetRpcResp = []byte{131}
func (t *NetRpcResp) MarshalCBOR(w io.Writer) error {
if t == nil {
_, err := w.Write(cbg.CborNull)
return err
}
cw := cbg.NewCborWriter(w)
if _, err := cw.Write(lengthBufNetRpcResp); err != nil {
return err
}
// t.Type (blockstore.NetRPCRespType) (uint8)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.Type)); err != nil {
return err
}
// t.ID (uint64) (uint64)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.ID)); err != nil {
return err
}
// t.Data ([]uint8) (slice)
if len(t.Data) > cbg.ByteArrayMaxLen {
return xerrors.Errorf("Byte array in field t.Data was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(t.Data))); err != nil {
return err
}
if _, err := cw.Write(t.Data[:]); err != nil {
return err
}
return nil
}
func (t *NetRpcResp) UnmarshalCBOR(r io.Reader) (err error) {
*t = NetRpcResp{}
cr := cbg.NewCborReader(r)
maj, extra, err := cr.ReadHeader()
if err != nil {
return err
}
defer func() {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
}()
if maj != cbg.MajArray {
return fmt.Errorf("cbor input should be of type array")
}
if extra != 3 {
return fmt.Errorf("cbor input had wrong number of fields")
}
// t.Type (blockstore.NetRPCRespType) (uint8)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint8 field")
}
if extra > math.MaxUint8 {
return fmt.Errorf("integer in input was too large for uint8 field")
}
t.Type = NetRPCRespType(extra)
// t.ID (uint64) (uint64)
{
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint64 field")
}
t.ID = uint64(extra)
}
// t.Data ([]uint8) (slice)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.ByteArrayMaxLen {
return fmt.Errorf("t.Data: byte array too large (%d)", extra)
}
if maj != cbg.MajByteString {
return fmt.Errorf("expected byte array")
}
if extra > 0 {
t.Data = make([]uint8, extra)
}
if _, err := io.ReadFull(cr, t.Data[:]); err != nil {
return err
}
return nil
}
var lengthBufNetRpcErr = []byte{131}
func (t *NetRpcErr) MarshalCBOR(w io.Writer) error {
if t == nil {
_, err := w.Write(cbg.CborNull)
return err
}
cw := cbg.NewCborWriter(w)
if _, err := cw.Write(lengthBufNetRpcErr); err != nil {
return err
}
// t.Type (blockstore.NetRPCErrType) (uint8)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.Type)); err != nil {
return err
}
// t.Msg (string) (string)
if len(t.Msg) > cbg.MaxLength {
return xerrors.Errorf("Value in field t.Msg was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Msg))); err != nil {
return err
}
if _, err := io.WriteString(w, string(t.Msg)); err != nil {
return err
}
// t.Cid (cid.Cid) (struct)
if t.Cid == nil {
if _, err := cw.Write(cbg.CborNull); err != nil {
return err
}
} else {
if err := cbg.WriteCid(cw, *t.Cid); err != nil {
return xerrors.Errorf("failed to write cid field t.Cid: %w", err)
}
}
return nil
}
func (t *NetRpcErr) UnmarshalCBOR(r io.Reader) (err error) {
*t = NetRpcErr{}
cr := cbg.NewCborReader(r)
maj, extra, err := cr.ReadHeader()
if err != nil {
return err
}
defer func() {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
}()
if maj != cbg.MajArray {
return fmt.Errorf("cbor input should be of type array")
}
if extra != 3 {
return fmt.Errorf("cbor input had wrong number of fields")
}
// t.Type (blockstore.NetRPCErrType) (uint8)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint8 field")
}
if extra > math.MaxUint8 {
return fmt.Errorf("integer in input was too large for uint8 field")
}
t.Type = NetRPCErrType(extra)
// t.Msg (string) (string)
{
sval, err := cbg.ReadString(cr)
if err != nil {
return err
}
t.Msg = string(sval)
}
// t.Cid (cid.Cid) (struct)
{
b, err := cr.ReadByte()
if err != nil {
return err
}
if b != cbg.CborNull[0] {
if err := cr.UnreadByte(); err != nil {
return err
}
c, err := cbg.ReadCid(cr)
if err != nil {
return xerrors.Errorf("failed to read cid field t.Cid: %w", err)
}
t.Cid = &c
}
}
return nil
}

462
blockstore/net.go Normal file
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package blockstore
import (
"bytes"
"context"
"encoding/binary"
"fmt"
"sync"
"sync/atomic"
blocks "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
ipld "github.com/ipfs/go-ipld-format"
"github.com/libp2p/go-msgio"
cbg "github.com/whyrusleeping/cbor-gen"
"golang.org/x/xerrors"
)
type NetRPCReqType byte
const (
NRpcHas NetRPCReqType = iota
NRpcGet NetRPCReqType = iota
NRpcGetSize NetRPCReqType = iota
NRpcPut NetRPCReqType = iota
NRpcDelete NetRPCReqType = iota
NRpcList NetRPCReqType = iota
// todo cancel req
)
type NetRPCRespType byte
const (
NRpcOK NetRPCRespType = iota
NRpcErr NetRPCRespType = iota
NRpcMore NetRPCRespType = iota
)
type NetRPCErrType byte
const (
NRpcErrGeneric NetRPCErrType = iota
NRpcErrNotFound NetRPCErrType = iota
)
type NetRpcReq struct {
Type NetRPCReqType
ID uint64
Cid []cid.Cid // todo maxsize?
Data [][]byte // todo maxsize?
}
type NetRpcResp struct {
Type NetRPCRespType
ID uint64
// error or cids in allkeys
Data []byte // todo maxsize?
next <-chan NetRpcResp
}
type NetRpcErr struct {
Type NetRPCErrType
Msg string
// in case of NRpcErrNotFound
Cid *cid.Cid
}
type NetworkStore struct {
// note: writer is thread-safe
msgStream msgio.ReadWriteCloser
// atomic
reqCount uint64
respLk sync.Mutex
// respMap is nil after store closes
respMap map[uint64]chan<- NetRpcResp
closing chan struct{}
closed chan struct{}
closeLk sync.Mutex
onClose func()
}
func NewNetworkStore(mss msgio.ReadWriteCloser) *NetworkStore {
ns := &NetworkStore{
msgStream: mss,
respMap: map[uint64]chan<- NetRpcResp{},
closing: make(chan struct{}),
closed: make(chan struct{}),
}
go ns.receive()
return ns
}
func (n *NetworkStore) shutdown(msg string) {
if err := n.msgStream.Close(); err != nil {
log.Errorw("closing netstore msg stream", "error", err)
}
nerr := NetRpcErr{
Type: NRpcErrGeneric,
Msg: msg,
Cid: nil,
}
var errb bytes.Buffer
if err := nerr.MarshalCBOR(&errb); err != nil {
log.Errorw("netstore shutdown: error marshaling error", "err", err)
}
n.respLk.Lock()
for id, resps := range n.respMap {
resps <- NetRpcResp{
Type: NRpcErr,
ID: id,
Data: errb.Bytes(),
}
}
n.respMap = nil
n.respLk.Unlock()
}
func (n *NetworkStore) OnClose(cb func()) {
n.closeLk.Lock()
defer n.closeLk.Unlock()
select {
case <-n.closed:
cb()
default:
n.onClose = cb
}
}
func (n *NetworkStore) receive() {
defer func() {
n.closeLk.Lock()
defer n.closeLk.Unlock()
close(n.closed)
if n.onClose != nil {
n.onClose()
}
}()
for {
select {
case <-n.closing:
n.shutdown("netstore stopping")
return
default:
}
msg, err := n.msgStream.ReadMsg()
if err != nil {
n.shutdown(fmt.Sprintf("netstore ReadMsg: %s", err))
return
}
var resp NetRpcResp
if err := resp.UnmarshalCBOR(bytes.NewReader(msg)); err != nil {
n.shutdown(fmt.Sprintf("unmarshaling netstore response: %s", err))
return
}
n.msgStream.ReleaseMsg(msg)
n.respLk.Lock()
if ch, ok := n.respMap[resp.ID]; ok {
if resp.Type == NRpcMore {
nch := make(chan NetRpcResp, 1)
resp.next = nch
n.respMap[resp.ID] = nch
} else {
delete(n.respMap, resp.ID)
}
ch <- resp
}
n.respLk.Unlock()
}
}
func (n *NetworkStore) sendRpc(rt NetRPCReqType, cids []cid.Cid, data [][]byte) (uint64, <-chan NetRpcResp, error) {
rid := atomic.AddUint64(&n.reqCount, 1)
respCh := make(chan NetRpcResp, 1) // todo pool?
n.respLk.Lock()
if n.respMap == nil {
return 0, nil, xerrors.Errorf("netstore closed")
}
n.respMap[rid] = respCh
n.respLk.Unlock()
req := NetRpcReq{
Type: rt,
ID: rid,
Cid: cids,
Data: data,
}
var rbuf bytes.Buffer // todo buffer pool
if err := req.MarshalCBOR(&rbuf); err != nil {
n.respLk.Lock()
if n.respMap == nil {
return 0, nil, xerrors.Errorf("netstore closed")
}
delete(n.respMap, rid)
n.respLk.Unlock()
return 0, nil, err
}
if err := n.msgStream.WriteMsg(rbuf.Bytes()); err != nil {
n.respLk.Lock()
if n.respMap == nil {
return 0, nil, xerrors.Errorf("netstore closed")
}
delete(n.respMap, rid)
n.respLk.Unlock()
return 0, nil, err
}
return rid, respCh, nil
}
func (n *NetworkStore) waitResp(ctx context.Context, rch <-chan NetRpcResp, rid uint64) (NetRpcResp, error) {
select {
case resp := <-rch:
if resp.Type == NRpcErr {
var e NetRpcErr
if err := e.UnmarshalCBOR(bytes.NewReader(resp.Data)); err != nil {
return NetRpcResp{}, xerrors.Errorf("unmarshaling error data: %w", err)
}
var err error
switch e.Type {
case NRpcErrNotFound:
if e.Cid != nil {
err = ipld.ErrNotFound{
Cid: *e.Cid,
}
} else {
err = xerrors.Errorf("block not found, but cid was null")
}
default:
err = xerrors.Errorf("unknown error type")
case NRpcErrGeneric:
err = xerrors.Errorf("generic error")
}
return NetRpcResp{}, xerrors.Errorf("netstore error response: %s (%w)", e.Msg, err)
}
return resp, nil
case <-ctx.Done():
// todo send cancel req
n.respLk.Lock()
if n.respMap != nil {
delete(n.respMap, rid)
}
n.respLk.Unlock()
return NetRpcResp{}, ctx.Err()
}
}
func (n *NetworkStore) Has(ctx context.Context, c cid.Cid) (bool, error) {
req, rch, err := n.sendRpc(NRpcHas, []cid.Cid{c}, nil)
if err != nil {
return false, err
}
resp, err := n.waitResp(ctx, rch, req)
if err != nil {
return false, err
}
if len(resp.Data) != 1 {
return false, xerrors.Errorf("expected reposnse length to be 1 byte")
}
switch resp.Data[0] {
case cbg.CborBoolTrue[0]:
return true, nil
case cbg.CborBoolFalse[0]:
return false, nil
default:
return false, xerrors.Errorf("has: bad response: %x", resp.Data[0])
}
}
func (n *NetworkStore) Get(ctx context.Context, c cid.Cid) (blocks.Block, error) {
req, rch, err := n.sendRpc(NRpcGet, []cid.Cid{c}, nil)
if err != nil {
return nil, err
}
resp, err := n.waitResp(ctx, rch, req)
if err != nil {
return nil, err
}
return blocks.NewBlockWithCid(resp.Data, c)
}
func (n *NetworkStore) View(ctx context.Context, c cid.Cid, callback func([]byte) error) error {
req, rch, err := n.sendRpc(NRpcGet, []cid.Cid{c}, nil)
if err != nil {
return err
}
resp, err := n.waitResp(ctx, rch, req)
if err != nil {
return err
}
return callback(resp.Data) // todo return buf to pool
}
func (n *NetworkStore) GetSize(ctx context.Context, c cid.Cid) (int, error) {
req, rch, err := n.sendRpc(NRpcGetSize, []cid.Cid{c}, nil)
if err != nil {
return 0, err
}
resp, err := n.waitResp(ctx, rch, req)
if err != nil {
return 0, err
}
if len(resp.Data) != 4 {
return 0, xerrors.Errorf("expected getsize response to be 4 bytes, was %d", resp.Data)
}
return int(binary.LittleEndian.Uint32(resp.Data)), nil
}
func (n *NetworkStore) Put(ctx context.Context, block blocks.Block) error {
return n.PutMany(ctx, []blocks.Block{block})
}
func (n *NetworkStore) PutMany(ctx context.Context, blocks []blocks.Block) error {
// todo pool
cids := make([]cid.Cid, len(blocks))
blkDatas := make([][]byte, len(blocks))
for i, block := range blocks {
cids[i] = block.Cid()
blkDatas[i] = block.RawData()
}
req, rch, err := n.sendRpc(NRpcPut, cids, blkDatas)
if err != nil {
return err
}
_, err = n.waitResp(ctx, rch, req)
if err != nil {
return err
}
return nil
}
func (n *NetworkStore) DeleteBlock(ctx context.Context, c cid.Cid) error {
return n.DeleteMany(ctx, []cid.Cid{c})
}
func (n *NetworkStore) DeleteMany(ctx context.Context, cids []cid.Cid) error {
req, rch, err := n.sendRpc(NRpcDelete, cids, nil)
if err != nil {
return err
}
_, err = n.waitResp(ctx, rch, req)
if err != nil {
return err
}
return nil
}
func (n *NetworkStore) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) {
req, rch, err := n.sendRpc(NRpcList, nil, nil)
if err != nil {
return nil, err
}
outCh := make(chan cid.Cid, 16)
go func() {
defer close(outCh)
// todo defer cancel request
for {
if rch == nil {
return
}
resp, err := n.waitResp(ctx, rch, req)
if err != nil {
return
}
switch resp.Type {
case NRpcOK, NRpcMore:
c, err := cid.Cast(resp.Data)
if err != nil {
return
}
// todo propagate backpressure
select {
case outCh <- c:
case <-ctx.Done():
return
}
rch = resp.next
default:
return
}
}
}()
return outCh, err
}
func (n *NetworkStore) HashOnRead(enabled bool) {
// todo
return
}
func (n *NetworkStore) Stop(ctx context.Context) error {
close(n.closing)
select {
case <-n.closed:
return nil
case <-ctx.Done():
return ctx.Err()
}
}
var _ Blockstore = &NetworkStore{}

236
blockstore/net_serve.go Normal file
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@ -0,0 +1,236 @@
package blockstore
import (
"bytes"
"context"
"encoding/binary"
block "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
ipld "github.com/ipfs/go-ipld-format"
"github.com/libp2p/go-msgio"
cbg "github.com/whyrusleeping/cbor-gen"
"golang.org/x/xerrors"
)
type NetworkStoreHandler struct {
msgStream msgio.ReadWriteCloser
bs Blockstore
}
func HandleNetBstoreStream(ctx context.Context, bs Blockstore, mss msgio.ReadWriteCloser) *NetworkStoreHandler {
ns := &NetworkStoreHandler{
msgStream: mss,
bs: bs,
}
go ns.handle(ctx)
return ns
}
func (h *NetworkStoreHandler) handle(ctx context.Context) {
defer func() {
if err := h.msgStream.Close(); err != nil {
log.Errorw("error closing blockstore stream", "error", err)
}
}()
for {
var req NetRpcReq
ms, err := h.msgStream.ReadMsg()
if err != nil {
log.Warnw("bstore stream err", "error", err)
return
}
if err := req.UnmarshalCBOR(bytes.NewReader(ms)); err != nil {
return
}
h.msgStream.ReleaseMsg(ms)
switch req.Type {
case NRpcHas:
if len(req.Cid) != 1 {
if err := h.respondError(req.ID, xerrors.New("expected request for 1 cid"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
res, err := h.bs.Has(ctx, req.Cid[0])
if err != nil {
if err := h.respondError(req.ID, err, req.Cid[0]); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
var resData [1]byte
if res {
resData[0] = cbg.CborBoolTrue[0]
} else {
resData[0] = cbg.CborBoolFalse[0]
}
if err := h.respond(req.ID, NRpcOK, resData[:]); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcGet:
if len(req.Cid) != 1 {
if err := h.respondError(req.ID, xerrors.New("expected request for 1 cid"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
err := h.bs.View(ctx, req.Cid[0], func(bdata []byte) error {
return h.respond(req.ID, NRpcOK, bdata)
})
if err != nil {
if err := h.respondError(req.ID, err, req.Cid[0]); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
case NRpcGetSize:
if len(req.Cid) != 1 {
if err := h.respondError(req.ID, xerrors.New("expected request for 1 cid"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
sz, err := h.bs.GetSize(ctx, req.Cid[0])
if err != nil {
if err := h.respondError(req.ID, err, req.Cid[0]); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
var resData [4]byte
binary.LittleEndian.PutUint32(resData[:], uint32(sz))
if err := h.respond(req.ID, NRpcOK, resData[:]); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcPut:
blocks := make([]block.Block, len(req.Cid))
if len(req.Cid) != len(req.Data) {
if err := h.respondError(req.ID, xerrors.New("cid count didn't match data count"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
}
return
}
for i := range req.Cid {
blocks[i], err = block.NewBlockWithCid(req.Data[i], req.Cid[i])
if err != nil {
log.Warnw("make block", "error", err)
return
}
}
err := h.bs.PutMany(ctx, blocks)
if err != nil {
if err := h.respondError(req.ID, err, cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
if err := h.respond(req.ID, NRpcOK, []byte{}); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcDelete:
err := h.bs.DeleteMany(ctx, req.Cid)
if err != nil {
if err := h.respondError(req.ID, err, cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
if err := h.respond(req.ID, NRpcOK, []byte{}); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcList:
if err := h.respondError(req.ID, xerrors.New("list todo"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
}
}
func (h *NetworkStoreHandler) respondError(req uint64, uerr error, c cid.Cid) error {
var resp NetRpcResp
resp.ID = req
resp.Type = NRpcErr
nerr := NetRpcErr{
Type: NRpcErrGeneric,
Msg: uerr.Error(),
}
if ipld.IsNotFound(uerr) {
nerr.Type = NRpcErrNotFound
nerr.Cid = &c
}
var edata bytes.Buffer
if err := nerr.MarshalCBOR(&edata); err != nil {
return xerrors.Errorf("marshaling error data: %w", err)
}
resp.Data = edata.Bytes()
var msg bytes.Buffer
if err := resp.MarshalCBOR(&msg); err != nil {
return xerrors.Errorf("marshaling error response: %w", err)
}
if err := h.msgStream.WriteMsg(msg.Bytes()); err != nil {
return xerrors.Errorf("write error response: %w", err)
}
return nil
}
func (h *NetworkStoreHandler) respond(req uint64, rt NetRPCRespType, data []byte) error {
var resp NetRpcResp
resp.ID = req
resp.Type = rt
resp.Data = data
var msg bytes.Buffer
if err := resp.MarshalCBOR(&msg); err != nil {
return xerrors.Errorf("marshaling response: %w", err)
}
if err := h.msgStream.WriteMsg(msg.Bytes()); err != nil {
return xerrors.Errorf("write response: %w", err)
}
return nil
}

63
blockstore/net_test.go Normal file
View File

@ -0,0 +1,63 @@
package blockstore
import (
"context"
"fmt"
"io"
"testing"
block "github.com/ipfs/go-block-format"
ipld "github.com/ipfs/go-ipld-format"
"github.com/libp2p/go-msgio"
"github.com/stretchr/testify/require"
)
func TestNetBstore(t *testing.T) {
ctx := context.Background()
cr, sw := io.Pipe()
sr, cw := io.Pipe()
cm := msgio.Combine(msgio.NewWriter(cw), msgio.NewReader(cr))
sm := msgio.Combine(msgio.NewWriter(sw), msgio.NewReader(sr))
bbs := NewMemorySync()
_ = HandleNetBstoreStream(ctx, bbs, sm)
nbs := NewNetworkStore(cm)
tb1 := block.NewBlock([]byte("aoeu"))
h, err := nbs.Has(ctx, tb1.Cid())
require.NoError(t, err)
require.False(t, h)
err = nbs.Put(ctx, tb1)
require.NoError(t, err)
h, err = nbs.Has(ctx, tb1.Cid())
require.NoError(t, err)
require.True(t, h)
sz, err := nbs.GetSize(ctx, tb1.Cid())
require.NoError(t, err)
require.Equal(t, 4, sz)
err = nbs.DeleteBlock(ctx, tb1.Cid())
require.NoError(t, err)
h, err = nbs.Has(ctx, tb1.Cid())
require.NoError(t, err)
require.False(t, h)
_, err = nbs.Get(ctx, tb1.Cid())
fmt.Println(err)
require.True(t, ipld.IsNotFound(err))
err = nbs.Put(ctx, tb1)
require.NoError(t, err)
b, err := nbs.Get(ctx, tb1.Cid())
require.NoError(t, err)
require.Equal(t, "aoeu", string(b.RawData()))
}

100
blockstore/net_ws.go Normal file
View File

@ -0,0 +1,100 @@
package blockstore
import (
"bytes"
"context"
"github.com/gorilla/websocket"
"github.com/libp2p/go-msgio"
"golang.org/x/xerrors"
)
type wsWrapper struct {
wc *websocket.Conn
nextMsg []byte
}
func (w *wsWrapper) Read(b []byte) (int, error) {
return 0, xerrors.New("read unsupported")
}
func (w *wsWrapper) ReadMsg() ([]byte, error) {
if w.nextMsg != nil {
nm := w.nextMsg
w.nextMsg = nil
return nm, nil
}
mt, r, err := w.wc.NextReader()
if err != nil {
return nil, err
}
switch mt {
case websocket.BinaryMessage, websocket.TextMessage:
default:
return nil, xerrors.Errorf("unexpected message type")
}
// todo pool
// todo limit sizes
var mbuf bytes.Buffer
if _, err := mbuf.ReadFrom(r); err != nil {
return nil, err
}
return mbuf.Bytes(), nil
}
func (w *wsWrapper) ReleaseMsg(bytes []byte) {
// todo use a pool
}
func (w *wsWrapper) NextMsgLen() (int, error) {
if w.nextMsg != nil {
return len(w.nextMsg), nil
}
mt, msg, err := w.wc.ReadMessage()
if err != nil {
return 0, err
}
switch mt {
case websocket.BinaryMessage, websocket.TextMessage:
default:
return 0, xerrors.Errorf("unexpected message type")
}
w.nextMsg = msg
return len(w.nextMsg), nil
}
func (w *wsWrapper) Write(bytes []byte) (int, error) {
return 0, xerrors.New("write unsupported")
}
func (w *wsWrapper) WriteMsg(bytes []byte) error {
return w.wc.WriteMessage(websocket.BinaryMessage, bytes)
}
func (w *wsWrapper) Close() error {
return w.wc.Close()
}
var _ msgio.ReadWriteCloser = &wsWrapper{}
func wsConnToMio(wc *websocket.Conn) msgio.ReadWriteCloser {
return &wsWrapper{
wc: wc,
}
}
func HandleNetBstoreWS(ctx context.Context, bs Blockstore, wc *websocket.Conn) *NetworkStoreHandler {
return HandleNetBstoreStream(ctx, bs, wsConnToMio(wc))
}
func NewNetworkStoreWS(wc *websocket.Conn) *NetworkStore {
return NewNetworkStore(wsConnToMio(wc))
}

View File

@ -7,6 +7,7 @@ import (
gen "github.com/whyrusleeping/cbor-gen"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/blockstore"
"github.com/filecoin-project/lotus/chain/exchange"
"github.com/filecoin-project/lotus/chain/market"
"github.com/filecoin-project/lotus/chain/types"
@ -127,4 +128,13 @@ func main() {
fmt.Println(err)
os.Exit(1)
}
err = gen.WriteTupleEncodersToFile("./blockstore/cbor_gen.go", "blockstore",
blockstore.NetRpcReq{},
blockstore.NetRpcResp{},
blockstore.NetRpcErr{},
)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}