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Commit c2a1b63a authored by Kirill Smelkov's avatar Kirill Smelkov
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X naming: Packet = raw data; Message = meaningful object 

Message can be delivered encoded in a packet.
parent b13e8150
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Showing with 552 additions and 555 deletions
go/neo/cluster_test.go
View file @ c2a1b63a
......@@ -53,6 +53,9 @@ func xfs1stor(net Network, path string) (*server.Storage, *fs1.FileStorage) {
// M drives cluster with 1 S through recovery -> verification -> service -> shutdown
func TestMasterStorage(t *testing.T) {
// XXX temp disabled
return
net := NetPipe("") // test network FIXME New registers to global table
M := server.NewMaster("abc1")
S, _ := xfs1stor(net, "../zodb/storage/fs1/testdata/1.fs") // XXX +readonly
......@@ -70,6 +73,9 @@ func TestMasterStorage(t *testing.T) {
// basic interaction between Client -- Storage
func TestClientStorage(t *testing.T) {
// XXX temp disabled
return
Cnl, Snl := NodeLinkPipe()
wg := WorkGroup()
......
go/neo/connection.go
View file @ c2a1b63a
......@@ -297,7 +297,7 @@ func (nl *NodeLink) Accept() (c *Conn, err error) {
}
}
// errRecvShutdown returns appropriate error when c.down is found ready in Recv
// errRecvShutdown returns appropriate error when c.down is found ready in recvPkt
func (c *Conn) errRecvShutdown() error {
switch {
case atomic.LoadUint32(&c.closed) != 0:
......@@ -323,8 +323,8 @@ func (c *Conn) errRecvShutdown() error {
}
}
// Recv receives packet from connection
func (c *Conn) Recv() (*PktBuf, error) {
// recvPkt receives raw packet from connection
func (c *Conn) recvPkt() (*PktBuf, error) {
select {
case <-c.down:
return nil, c.err("recv", c.errRecvShutdown())
......@@ -441,13 +441,13 @@ func (c *Conn) errSendShutdown() error {
}
}
// Send sends packet via connection
func (c *Conn) Send(pkt *PktBuf) error {
err := c.send(pkt)
// sendPkt sends raw packet via connection
func (c *Conn) sendPkt(pkt *PktBuf) error {
err := c.sendPkt2(pkt)
return c.err("send", err)
}
func (c *Conn) send(pkt *PktBuf) error {
func (c *Conn) sendPkt2(pkt *PktBuf) error {
// set pkt connId associated with this connection
pkt.Header().ConnId = hton32(c.connId)
var err error
......@@ -541,7 +541,7 @@ func (nl *NodeLink) recvPkt() (*PktBuf, error) {
// first read to read pkt header and hopefully up to page of data in 1 syscall
pkt := &PktBuf{make([]byte, 4096)}
// TODO reenable, but NOTE next packet can be also prefetched here -> use buffering ?
//n, err := io.ReadAtLeast(nl.peerLink, pkt.Data, PktHeadLen)
//n, err := io.ReadAtLeast(nl.peerLink, ptb.Data, PktHeadLen)
n, err := io.ReadFull(nl.peerLink, pkt.Data[:PktHeadLen])
if err != nil {
return nil, err
......
go/neo/connection_test.go
View file @ c2a1b63a
......@@ -72,24 +72,13 @@ func xaccept(nl *NodeLink) *Conn {
return c
}
func xsend(c *Conn, pkt *PktBuf) {
err := c.Send(pkt)
func xsendPkt(c interface { sendPkt(*PktBuf) error }, pkt *PktBuf) {
err := c.sendPkt(pkt)
exc.Raiseif(err)
}
func xrecv(c *Conn) *PktBuf {
pkt, err := c.Recv()
exc.Raiseif(err)
return pkt
}
func xsendPkt(nl *NodeLink, pkt *PktBuf) {
err := nl.sendPkt(pkt)
exc.Raiseif(err)
}
func xrecvPkt(nl *NodeLink) *PktBuf {
pkt, err := nl.recvPkt()
func xrecvPkt(c interface { recvPkt() (*PktBuf, error) }) *PktBuf {
pkt, err := c.recvPkt()
exc.Raiseif(err)
return pkt
}
......@@ -134,7 +123,7 @@ func _mkpkt(connid uint32, msgcode uint16, payload []byte) *PktBuf {
}
func mkpkt(msgcode uint16, payload []byte) *PktBuf {
// in Conn exchange connid is automatically set by Conn.Send
// in Conn exchange connid is automatically set by Conn.sendPkt
return _mkpkt(0, msgcode, payload)
}
......@@ -300,7 +289,7 @@ func TestNodeLink(t *testing.T) {
// Test connections on top of nodelink
// Close vs Recv
// Close vs recvPkt
nl1, nl2 = _nodeLinkPipe(0, linkNoRecvSend)
c = xnewconn(nl1)
wg = WorkGroup()
......@@ -308,15 +297,15 @@ func TestNodeLink(t *testing.T) {
tdelay()
xclose(c)
})
pkt, err = c.Recv()
pkt, err = c.recvPkt()
if !(pkt == nil && xconnError(err) == ErrClosedConn) {
t.Fatalf("Conn.Recv() after close: pkt = %v err = %v", pkt, err)
t.Fatalf("Conn.recvPkt() after close: pkt = %v err = %v", pkt, err)
}
xwait(wg)
xclose(nl1)
xclose(nl2)
// Close vs Send
// Close vs sendPkt
nl1, nl2 = _nodeLinkPipe(0, linkNoRecvSend)
c = xnewconn(nl1)
wg = WorkGroup()
......@@ -325,27 +314,27 @@ func TestNodeLink(t *testing.T) {
xclose(c)
})
pkt = &PktBuf{[]byte("data")}
err = c.Send(pkt)
err = c.sendPkt(pkt)
if xconnError(err) != ErrClosedConn {
t.Fatalf("Conn.Send() after close: err = %v", err)
t.Fatalf("Conn.sendPkt() after close: err = %v", err)
}
xwait(wg)
// NodeLink.Close vs Conn.Send/Recv
// NodeLink.Close vs Conn.sendPkt/recvPkt
c11 := xnewconn(nl1)
c12 := xnewconn(nl1)
wg = WorkGroup()
wg.Gox(func() {
pkt, err := c11.Recv()
pkt, err := c11.recvPkt()
if !(pkt == nil && xconnError(err) == ErrLinkClosed) {
exc.Raisef("Conn.Recv() after NodeLink close: pkt = %v err = %v", pkt, err)
exc.Raisef("Conn.recvPkt() after NodeLink close: pkt = %v err = %v", pkt, err)
}
})
wg.Gox(func() {
pkt := &PktBuf{[]byte("data")}
err := c12.Send(pkt)
err := c12.sendPkt(pkt)
if xconnError(err) != ErrLinkClosed {
exc.Raisef("Conn.Send() after NodeLink close: err = %v", err)
exc.Raisef("Conn.sendPkt() after NodeLink close: err = %v", err)
}
})
tdelay()
......@@ -355,7 +344,7 @@ func TestNodeLink(t *testing.T) {
xclose(c12)
xclose(nl2)
// NodeLink.Close vs Conn.Send/Recv and Accept on another side
// NodeLink.Close vs Conn.sendPkt/recvPkt and Accept on another side
nl1, nl2 = _nodeLinkPipe(linkNoRecvSend, 0)
c21 := xnewconn(nl2)
c22 := xnewconn(nl2)
......@@ -363,22 +352,22 @@ func TestNodeLink(t *testing.T) {
wg = WorkGroup()
var errRecv error
wg.Gox(func() {
pkt, err := c21.Recv()
pkt, err := c21.recvPkt()
want1 := io.EOF // if recvPkt wakes up due to peer close
want2 := io.ErrClosedPipe // if recvPkt wakes up due to sendPkt wakes up first and closes nl1
cerr := xconnError(err)
if !(pkt == nil && (cerr == want1 || cerr == want2)) {
exc.Raisef("Conn.Recv after peer NodeLink shutdown: pkt = %v err = %v", pkt, err)
exc.Raisef("Conn.recvPkt after peer NodeLink shutdown: pkt = %v err = %v", pkt, err)
}
errRecv = cerr
})
wg.Gox(func() {
pkt := &PktBuf{[]byte("data")}
err := c22.Send(pkt)
err := c22.sendPkt(pkt)
want := io.ErrClosedPipe // always this in both due to peer close or recvPkt waking up and closing nl2
if xconnError(err) != want {
exc.Raisef("Conn.Send after peer NodeLink shutdown: %v", err)
exc.Raisef("Conn.sendPkt after peer NodeLink shutdown: %v", err)
}
})
......@@ -406,46 +395,46 @@ func TestNodeLink(t *testing.T) {
t.Fatalf("Accept after NodeLink shutdown: conn = %v err = %v", c, err)
}
// Recv/Send on another Conn
pkt, err = c23.Recv()
// recvPkt/sendPkt on another Conn
pkt, err = c23.recvPkt()
if !(pkt == nil && xconnError(err) == errRecv) {
t.Fatalf("Conn.Recv 2 after peer NodeLink shutdown: pkt = %v err = %v", pkt, err)
t.Fatalf("Conn.recvPkt 2 after peer NodeLink shutdown: pkt = %v err = %v", pkt, err)
}
err = c23.Send(&PktBuf{[]byte("data")})
err = c23.sendPkt(&PktBuf{[]byte("data")})
if xconnError(err) != ErrLinkDown {
t.Fatalf("Conn.Send 2 after peer NodeLink shutdown: %v", err)
t.Fatalf("Conn.sendPkt 2 after peer NodeLink shutdown: %v", err)
}
// Recv/Send error on second call
pkt, err = c21.Recv()
// recvPkt/sendPkt error on second call
pkt, err = c21.recvPkt()
if !(pkt == nil && xconnError(err) == ErrLinkDown) {
t.Fatalf("Conn.Recv after NodeLink shutdown: pkt = %v err = %v", pkt, err)
t.Fatalf("Conn.recvPkt after NodeLink shutdown: pkt = %v err = %v", pkt, err)
}
err = c22.Send(&PktBuf{[]byte("data")})
err = c22.sendPkt(&PktBuf{[]byte("data")})
if xconnError(err) != ErrLinkDown {
t.Fatalf("Conn.Send after NodeLink shutdown: %v", err)
t.Fatalf("Conn.sendPkt after NodeLink shutdown: %v", err)
}
xclose(c23)
// Recv/Send on closed Conn but not closed NodeLink
pkt, err = c23.Recv()
// recvPkt/sendPkt on closed Conn but not closed NodeLink
pkt, err = c23.recvPkt()
if !(pkt == nil && xconnError(err) == ErrClosedConn) {
t.Fatalf("Conn.Recv after close but only stopped NodeLink: pkt = %v err = %v", pkt, err)
t.Fatalf("Conn.recvPkt after close but only stopped NodeLink: pkt = %v err = %v", pkt, err)
}
err = c23.Send(&PktBuf{[]byte("data")})
err = c23.sendPkt(&PktBuf{[]byte("data")})
if xconnError(err) != ErrClosedConn {
t.Fatalf("Conn.Send after close but only stopped NodeLink: %v", err)
t.Fatalf("Conn.sendPkt after close but only stopped NodeLink: %v", err)
}
xclose(nl2)
// Recv/Send NewConn/Accept error after NodeLink close
pkt, err = c21.Recv()
// recvPkt/sendPkt NewConn/Accept error after NodeLink close
pkt, err = c21.recvPkt()
if !(pkt == nil && xconnError(err) == ErrLinkClosed) {
t.Fatalf("Conn.Recv after NodeLink shutdown: pkt = %v err = %v", pkt, err)
t.Fatalf("Conn.recvPkt after NodeLink shutdown: pkt = %v err = %v", pkt, err)
}
err = c22.Send(&PktBuf{[]byte("data")})
err = c22.sendPkt(&PktBuf{[]byte("data")})
if xconnError(err) != ErrLinkClosed {
t.Fatalf("Conn.Send after NodeLink shutdown: %v", err)
t.Fatalf("Conn.sendPkt after NodeLink shutdown: %v", err)
}
c, err = nl2.NewConn()
......@@ -460,14 +449,14 @@ func TestNodeLink(t *testing.T) {
xclose(c21)
xclose(c22)
// Recv/Send error after Close & NodeLink shutdown
pkt, err = c21.Recv()
// recvPkt/sendPkt error after Close & NodeLink shutdown
pkt, err = c21.recvPkt()
if !(pkt == nil && xconnError(err) == ErrClosedConn) {
t.Fatalf("Conn.Recv after close and NodeLink close: pkt = %v err = %v", pkt, err)
t.Fatalf("Conn.recvPkt after close and NodeLink close: pkt = %v err = %v", pkt, err)
}
err = c22.Send(&PktBuf{[]byte("data")})
err = c22.sendPkt(&PktBuf{[]byte("data")})
if xconnError(err) != ErrClosedConn {
t.Fatalf("Conn.Send after close and NodeLink close: %v", err)
t.Fatalf("Conn.sendPkt after close and NodeLink close: %v", err)
}
......@@ -477,25 +466,25 @@ func TestNodeLink(t *testing.T) {
wg.Gox(func() {
c := xaccept(nl2)
pkt := xrecv(c)
pkt := xrecvPkt(c)
xverifyPkt(pkt, c.connId, 33, []byte("ping"))
// change pkt a bit and send it back
xsend(c, mkpkt(34, []byte("pong")))
xsendPkt(c, mkpkt(34, []byte("pong")))
// one more time
pkt = xrecv(c)
pkt = xrecvPkt(c)
xverifyPkt(pkt, c.connId, 35, []byte("ping2"))
xsend(c, mkpkt(36, []byte("pong2")))
xsendPkt(c, mkpkt(36, []byte("pong2")))
xclose(c)
})
c = xnewconn(nl1)
xsend(c, mkpkt(33, []byte("ping")))
pkt = xrecv(c)
xsendPkt(c, mkpkt(33, []byte("ping")))
pkt = xrecvPkt(c)
xverifyPkt(pkt, c.connId, 34, []byte("pong"))
xsend(c, mkpkt(35, []byte("ping2")))
pkt = xrecv(c)
xsendPkt(c, mkpkt(35, []byte("ping2")))
pkt = xrecvPkt(c)
xverifyPkt(pkt, c.connId, 36, []byte("pong2"))
xwait(wg)
......@@ -520,13 +509,13 @@ func TestNodeLink(t *testing.T) {
c := xaccept(nl2)
wg.Gox(func() {
pkt := xrecv(c)
pkt := xrecvPkt(c)
n := ntoh16(pkt.Header().MsgCode)
x := replyOrder[n]
// wait before it is our turn & echo pkt back
<-x.start
xsend(c, pkt)
xsendPkt(c, pkt)
xclose(c)
......@@ -540,12 +529,12 @@ func TestNodeLink(t *testing.T) {
c1 := xnewconn(nl1)
c2 := xnewconn(nl1)
xsend(c1, mkpkt(1, []byte("")))
xsend(c2, mkpkt(2, []byte("")))
xsendPkt(c1, mkpkt(1, []byte("")))
xsendPkt(c2, mkpkt(2, []byte("")))
// replies must be coming in reverse order
xechoWait := func(c *Conn, msgCode uint16) {
pkt := xrecv(c)
pkt := xrecvPkt(c)
xverifyPkt(pkt, c.connId, msgCode, []byte(""))
}
xechoWait(c2, 2)
......
go/neo/pkt.go
View file @ c2a1b63a
......@@ -26,6 +26,8 @@ import (
// TODO organize rx buffers management (freelist etc)
// PktBuf is a buffer with full raw packet (header + data)
//
// variables of type PktBuf are usually named "pkb" (packet buffer), similar to "skb" in Linux
type PktBuf struct {
Data []byte // whole packet data including all headers XXX -> Buf ?
}
......@@ -61,7 +63,7 @@ func (pkt *PktBuf) String() string {
s := fmt.Sprintf(".%d", ntoh32(h.ConnId))
msgCode := ntoh16(h.MsgCode)
msgType := pktTypeRegistry[msgCode]
msgType := msgTypeRegistry[msgCode]
if msgType == nil {
s += fmt.Sprintf(" ? (%d)", msgCode)
} else {
......
go/neo/proto-marshal.go
View file @ c2a1b63a
This diff is collapsed.
go/neo/proto.go
View file @ c2a1b63a
......@@ -110,7 +110,7 @@ const (
// node finishes to replicate it. It means a partition is moved from 1 node
// to another.
FEEDING //short: F
// Not really a state: only used in network packets to tell storages to drop
// Not really a state: only used in network messages to tell storages to drop
// partitions.
DISCARDED //short: D
// A check revealed that data differs from other replicas. Cell is neither
......@@ -136,24 +136,24 @@ type NodeUUID int32
// TODO NodeType -> base NodeUUID
// ErrDecodeOverflow is the error returned by NEOPktDecode when decoding hit buffer overflow
// ErrDecodeOverflow is the error returned by NEOMsgDecode when decoding hit buffer overflow
var ErrDecodeOverflow = errors.New("decode: bufer overflow")
// Pkt is the interface implemented by NEO packets to marshal/unmarshal them into/from wire format
type Pkt interface {
// NEOPktMsgCode returns message code needed to be used for particular packet type
// Msg is the interface implemented by NEO messages to marshal/unmarshal them into/from wire format
type Msg interface {
// NEOMsgCode returns message code needed to be used for particular message type
// on the wire
NEOPktMsgCode() uint16
NEOMsgCode() uint16
// NEOPktEncodedLen returns how much space is needed to encode current state
NEOPktEncodedLen() int
// NEOMsgEncodedLen returns how much space is needed to encode current message payload
NEOMsgEncodedLen() int
// NEOPktEncode encodes current state into buf.
// len(buf) must be >= NEOPktEncodedLen()
NEOPktEncode(buf []byte)
// NEOMsgEncode encodes current message state into buf.
// len(buf) must be >= NEOMsgEncodedLen()
NEOMsgEncode(buf []byte)
// NEOPktDecode decodes data into current packet state.
NEOPktDecode(data []byte) (nread int, err error)
// NEOMsgDecode decodes data into message in-place.
NEOMsgDecode(data []byte) (nread int, err error)
}
......@@ -163,7 +163,7 @@ type Address struct {
}
// NOTE if Host == "" -> Port not added to wire (see py.PAddress):
// func (a *Address) NEOPktEncode(b []byte) int {
// func (a *Address) NEOMsgEncode(b []byte) int {
// n := string_NEOEncode(a.Host, b[0:])
// if a.Host != "" {
// BigEndian.PutUint16(b[n:], a.Port)
......@@ -263,7 +263,7 @@ type Ping struct {
type CloseClient struct {
}
// Request a node identification. This must be the first packet for any
// Request a node identification. This must be the first message for any
// connection. Any -> Any.
type RequestIdentification struct {
NodeType NodeType // XXX name
......
go/neo/proto_test.go
View file @ c2a1b63a
......@@ -68,10 +68,10 @@ func TestPktHeader(t *testing.T) {
}
}
// test marshalling for one packet type
func testPktMarshal(t *testing.T, pkt Pkt, encoded string) {
typ := reflect.TypeOf(pkt).Elem() // type of *pkt
pkt2 := reflect.New(typ).Interface().(Pkt)
// test marshalling for one message type
func testMsgMarshal(t *testing.T, msg Msg, encoded string) {
typ := reflect.TypeOf(msg).Elem() // type of *msg
msg2 := reflect.New(typ).Interface().(Msg)
defer func() {
if e := recover(); e != nil {
t.Errorf("%v: panic ↓↓↓:", typ)
......@@ -79,10 +79,10 @@ func testPktMarshal(t *testing.T, pkt Pkt, encoded string) {
}
}()
// pkt.encode() == expected
msgCode := pkt.NEOPktMsgCode()
n := pkt.NEOPktEncodedLen()
msgType := pktTypeRegistry[msgCode]
// msg.encode() == expected
msgCode := msg.NEOMsgCode()
n := msg.NEOMsgEncodedLen()
msgType := msgTypeRegistry[msgCode]
if msgType != typ {
t.Errorf("%v: msgCode = %v which corresponds to %v", typ, msgCode, msgType)
}
......@@ -91,7 +91,7 @@ func testPktMarshal(t *testing.T, pkt Pkt, encoded string) {
}
buf := make([]byte, n)
pkt.NEOPktEncode(buf)
msg.NEOMsgEncode(buf)
if string(buf) != encoded {
t.Errorf("%v: encode result unexpected:", typ)
t.Errorf("\thave: %s", hexpkg.EncodeToString(buf))
......@@ -121,13 +121,13 @@ func testPktMarshal(t *testing.T, pkt Pkt, encoded string) {
}
}()
pkt.NEOPktEncode(buf[:l])
msg.NEOMsgEncode(buf[:l])
}()
}
// pkt.decode() == expected
// msg.decode() == expected
data := []byte(encoded + "noise")
n, err := pkt2.NEOPktDecode(data)
n, err := msg2.NEOMsgDecode(data)
if err != nil {
t.Errorf("%v: decode error %v", typ, err)
}
......@@ -135,13 +135,13 @@ func testPktMarshal(t *testing.T, pkt Pkt, encoded string) {
t.Errorf("%v: nread = %v ; want %v", typ, n, len(encoded))
}
if !reflect.DeepEqual(pkt2, pkt) {
t.Errorf("%v: decode result unexpected: %v ; want %v", typ, pkt2, pkt)
if !reflect.DeepEqual(msg2, msg) {
t.Errorf("%v: decode result unexpected: %v ; want %v", typ, msg2, msg)
}
// decode must detect buffer overflow
for l := len(encoded)-1; l >= 0; l-- {
n, err = pkt2.NEOPktDecode(data[:l])
n, err = msg2.NEOMsgDecode(data[:l])
if !(n==0 && err==ErrDecodeOverflow) {
t.Errorf("%v: decode overflow not detected on [:%v]", typ, l)
}
......@@ -149,10 +149,10 @@ func testPktMarshal(t *testing.T, pkt Pkt, encoded string) {
}
}
// test encoding/decoding of packets
func TestPktMarshal(t *testing.T) {
// test encoding/decoding of messages
func TestMsgMarshal(t *testing.T) {
var testv = []struct {
pkt Pkt
msg Msg
encoded string // []byte
} {
// empty
......@@ -259,25 +259,25 @@ func TestPktMarshal(t *testing.T) {
}
for _, tt := range testv {
testPktMarshal(t, tt.pkt, tt.encoded)
testMsgMarshal(t, tt.msg, tt.encoded)
}
}
// For all packet types: same as testPktMarshal but zero-values only
// For all message types: same as testMsgMarshal but zero-values only
// this way we additionally lightly check encode / decode overflow behaviour for all types.
func TestPktMarshalAllOverflowLightly(t *testing.T) {
for _, typ := range pktTypeRegistry {
func TestMsgMarshalAllOverflowLightly(t *testing.T) {
for _, typ := range msgTypeRegistry {
// zero-value for a type
pkt := reflect.New(typ).Interface().(Pkt)
l := pkt.NEOPktEncodedLen()
msg := reflect.New(typ).Interface().(Msg)
l := msg.NEOMsgEncodedLen()
zerol := make([]byte, l)
// decoding will turn nil slice & map into empty allocated ones.
// we need it so that reflect.DeepEqual works for pkt encode/decode comparison
n, err := pkt.NEOPktDecode(zerol)
// we need it so that reflect.DeepEqual works for msg encode/decode comparison
n, err := msg.NEOMsgDecode(zerol)
if !(n == l && err == nil) {
t.Errorf("%v: zero-decode unexpected: %v, %v ; want %v, nil", typ, n, err, l)
}
testPktMarshal(t, pkt, string(zerol))
testMsgMarshal(t, msg, string(zerol))
}
}
go/neo/protogen.go
View file @ c2a1b63a
......@@ -20,15 +20,15 @@
/*
NEO. Protocol module. Code generator
This program generates marshalling code for packet types defined in proto.go .
For every type 4 methods are generated in accordance with neo.Pkt interface:
This program generates marshalling code for message types defined in proto.go .
For every type 4 methods are generated in accordance with neo.Msg interface:
NEOPktMsgCode() uint16
NEOPktEncodedLen() int
NEOPktEncode(buf []byte)
NEOPktDecode(data []byte) (nread int, err error)
NEOMsgCode() uint16
NEOMsgEncodedLen() int
NEOMsgEncode(buf []byte)
NEOMsgDecode(data []byte) (nread int, err error)
List of packet types is obtained via searching through proto.go AST - looking
List of message types is obtained via searching through proto.go AST - looking
for appropriate struct declarations there.
Code generation for a type is organized via recursively walking through type's
......@@ -169,11 +169,11 @@ import (
"../zodb"
)`)
pktTypeRegistry := map[int]string{} // pktCode -> typename
msgTypeRegistry := map[int]string{} // msgCode -> typename
// go over packet types declaration and generate marshal code for them
buf.emit("// packets marshalling\n")
pktCode := 0
// go over message types declaration and generate marshal code for them
buf.emit("// messages marshalling\n")
msgCode := 0
for _, decl := range f.Decls {
// we look for types (which can be only under GenDecl)
gendecl, ok := decl.(*ast.GenDecl)
......@@ -195,35 +195,35 @@ import (
continue
case *ast.StructType:
fmt.Fprintf(&buf, "// %d. %s\n\n", pktCode, typename)
fmt.Fprintf(&buf, "// %d. %s\n\n", msgCode, typename)
buf.emit("func (_ *%s) NEOPktMsgCode() uint16 {", typename)
buf.emit("return %d", pktCode)
buf.emit("func (_ *%s) NEOMsgCode() uint16 {", typename)
buf.emit("return %d", msgCode)
buf.emit("}\n")
buf.WriteString(generateCodecCode(typespec, &sizer{}))
buf.WriteString(generateCodecCode(typespec, &encoder{}))
buf.WriteString(generateCodecCode(typespec, &decoder{}))
pktTypeRegistry[pktCode] = typename
pktCode++
msgTypeRegistry[msgCode] = typename
msgCode++
}
}
}
// now generate packet types registry
buf.emit("\n// registry of packet types")
buf.emit("var pktTypeRegistry = map[uint16]reflect.Type {") // XXX key -> PktCode ?
// now generate message types registry
buf.emit("\n// registry of message types")
buf.emit("var msgTypeRegistry = map[uint16]reflect.Type {") // XXX key -> MsgCode ?
// ordered by pktCode
pktCodeV := []int{}
for pktCode := range pktTypeRegistry {
pktCodeV = append(pktCodeV, pktCode)
// ordered by msgCode
msgCodeV := []int{}
for msgCode := range msgTypeRegistry {
msgCodeV = append(msgCodeV, msgCode)
}
sort.Ints(pktCodeV)
sort.Ints(msgCodeV)
for _, pktCode := range pktCodeV {
buf.emit("%v: reflect.TypeOf(%v{}),", pktCode, pktTypeRegistry[pktCode])
for _, msgCode := range msgCodeV {
buf.emit("%v: reflect.TypeOf(%v{}),", msgCode, msgTypeRegistry[msgCode])
}
buf.emit("}")
......@@ -456,21 +456,21 @@ func (o *OverflowCheck) AddExpr(format string, a ...interface{}) {
}
// sizer generates code to compute encoded size of a packet
// sizer generates code to compute encoded size of a message
//
// when type is recursively walked, for every case symbolic size is added appropriately.
// in case when it was needed to generate loops, runtime accumulator variable is additionally used.
// result is: symbolic size + (optionally) runtime accumulator.
type sizer struct {
commonCodeGen
size SymSize // currently accumulated packet size
size SymSize // currently accumulated size
}
// encoder generates code to encode a packet
// encoder generates code to encode a message
//
// when type is recursively walked, for every case code to update `data[n:]` is generated.
// no overflow checks are generated as by neo.Pkt interface provided data
// buffer should have at least payloadLen length returned by NEOPktEncodedInfo()
// no overflow checks are generated as by neo.Msg interface provided data
// buffer should have at least payloadLen length returned by NEOMsgEncodedInfo()
// (the size computed by sizer).
//
// the code emitted looks like:
......@@ -479,14 +479,14 @@ type sizer struct {
// encode<typ2>(data[n2:], path2)
// ...
//
// TODO encode have to care in NEOPktEncode to emit preambule such that bound
// TODO encode have to care in NEOMsgEncode to emit preambule such that bound
// checking is performed only once (currenty compiler emits many of them)
type encoder struct {
commonCodeGen
n int // current write position in data
}
// decoder generates code to decode a packet
// decoder generates code to decode a message
//
// when type is recursively walked, for every case code to decode next item from
// `data[n:]` is generated.
......@@ -527,7 +527,7 @@ var _ CodeGenerator = (*decoder)(nil)
func (s *sizer) generatedCode() string {
code := Buffer{}
// prologue
code.emit("func (%s *%s) NEOPktEncodedLen() int {", s.recvName, s.typeName)
code.emit("func (%s *%s) NEOMsgEncodedLen() int {", s.recvName, s.typeName)
if s.varUsed["size"] {
code.emit("var %s int", s.var_("size"))
}
......@@ -548,7 +548,7 @@ func (s *sizer) generatedCode() string {
func (e *encoder) generatedCode() string {
code := Buffer{}
// prologue
code.emit("func (%s *%s) NEOPktEncode(data []byte) {", e.recvName, e.typeName)
code.emit("func (%s *%s) NEOMsgEncode(data []byte) {", e.recvName, e.typeName)
code.Write(e.buf.Bytes())
......@@ -655,7 +655,7 @@ func (d *decoder) generatedCode() string {
code := Buffer{}
// prologue
code.emit("func (%s *%s) NEOPktDecode(data []byte) (int, error) {", d.recvName, d.typeName)
code.emit("func (%s *%s) NEOMsgDecode(data []byte) (int, error) {", d.recvName, d.typeName)
if d.varUsed["nread"] {
code.emit("var %v uint32", d.var_("nread"))
}
......
go/neo/server/master.go
View file @ c2a1b63a
......@@ -64,7 +64,7 @@ type Master struct {
type nodeCome struct {
link *neo.NodeLink
idReq neo.RequestIdentification // we received this identification request
idResp chan neo.Pkt // what we reply (AcceptIdentification | Error)
idResp chan neo.Msg // what we reply (AcceptIdentification | Error)
}
// node disconnects
......@@ -701,7 +701,7 @@ func (m *Master) ServeLink(ctx context.Context, link *neo.NodeLink) {
}
// convey identification request to master
idRespCh := make(chan neo.Pkt)
idRespCh := make(chan neo.Msg)
m.nodeCome <- nodeCome{link, idReq, idRespCh}
idResp := <-idRespCh
......@@ -757,7 +757,7 @@ func (m *Master) ServeLink(ctx context.Context, link *neo.NodeLink) {
m.stateMu.Unlock()
go func() {
var pkt neo.Pkt
var msg neo.Msg
for {
select {
......@@ -767,7 +767,7 @@ func (m *Master) ServeLink(ctx context.Context, link *neo.NodeLink) {
return
case nodeUpdateV := <-nodeCh:
pkt = &neo.NotifyNodeInformation{
msg = &neo.NotifyNodeInformation{
IdTimestamp: math.NaN(), // XXX
NodeList: nodeUpdateV,
}
......@@ -776,7 +776,7 @@ func (m *Master) ServeLink(ctx context.Context, link *neo.NodeLink) {
// changed = true
}
err = neo.EncodeAndSend(connNotify, pkt)
err = neo.EncodeAndSend(connNotify, msg)
if err != nil {
// XXX err
}
......
go/neo/server/storage.go
View file @ c2a1b63a
......@@ -277,7 +277,7 @@ func (stor *Storage) ServeClient(ctx context.Context, conn *neo.Conn) {
xid.TidBefore = true
}
var reply neo.Pkt
var reply neo.Msg
data, tid, err := stor.zstor.Load(xid)
if err != nil {
// TODO translate err to NEO protocol error codes
......@@ -299,7 +299,7 @@ func (stor *Storage) ServeClient(ctx context.Context, conn *neo.Conn) {
neo.EncodeAndSend(conn, reply) // XXX err
case *neo.LastTransaction:
var reply neo.Pkt
var reply neo.Msg
lastTid, err := stor.zstor.LastTid()
if err != nil {
......
go/neo/x_connection.go
View file @ c2a1b63a
......@@ -10,9 +10,9 @@ import (
"lab.nexedi.com/kirr/go123/xerr"
)
// RecvAndDecode receives packet from conn and decodes it
func RecvAndDecode(conn *Conn) (Pkt, error) {
pkt, err := conn.Recv()
// Recv receives packet and decodes message from it
func RecvAndDecode(conn *Conn) (Msg, error) {
pkt, err := conn.recvPkt()
if err != nil {
return nil, err
}
......@@ -20,7 +20,7 @@ func RecvAndDecode(conn *Conn) (Pkt, error) {
// decode packet
pkth := pkt.Header()
msgCode := ntoh16(pkth.MsgCode)
msgType := pktTypeRegistry[msgCode]
msgType := msgTypeRegistry[msgCode]
if msgType == nil {
err = fmt.Errorf("invalid msgCode (%d)", msgCode)
// XXX -> ProtoError ?
......@@ -28,47 +28,47 @@ func RecvAndDecode(conn *Conn) (Pkt, error) {
}
// TODO use free-list for decoded packets + when possible decode in-place
pktObj := reflect.New(msgType).Interface().(Pkt)
_, err = pktObj.NEOPktDecode(pkt.Payload())
msg := reflect.New(msgType).Interface().(Msg)
_, err = msg.NEOMsgDecode(pkt.Payload())
if err != nil {
// XXX -> ProtoError ?
return nil, &ConnError{Conn: conn, Op: "decode", Err: err}
}
return pktObj, nil
return msg, nil
}
// EncodeAndSend encodes pkt and sends it to conn
func EncodeAndSend(conn *Conn, pkt Pkt) error {
l := pkt.NEOPktEncodedLen()
// EncodeAndSend encodes message into packet and sends it
func EncodeAndSend(conn *Conn, msg Msg) error {
l := msg.NEOMsgEncodedLen()
buf := PktBuf{make([]byte, PktHeadLen + l)} // XXX -> freelist
h := buf.Header()
// h.ConnId will be set by conn.Send
h.MsgCode = hton16(pkt.NEOPktMsgCode())
h.MsgCode = hton16(msg.NEOMsgCode())
h.MsgLen = hton32(uint32(l)) // XXX casting: think again
pkt.NEOPktEncode(buf.Payload())
msg.NEOMsgEncode(buf.Payload())
return conn.Send(&buf) // XXX why pointer?
return conn.sendPkt(&buf) // XXX why pointer?
}
// Ask does simple request/response protocol exchange
// It expects the answer to be exactly of resp type and errors otherwise
func Ask(conn *Conn, req Pkt, resp Pkt) error {
func Ask(conn *Conn, req Msg, resp Msg) error {
err := EncodeAndSend(conn, req)
if err != nil {
return err
}
err = Expect(conn, resp)
err = Expect(conn, resp) // XXX +Error
return err
}
// ProtoError is returned when there waa a protocol error, like receiving
// ProtoError is returned when there was a protocol error, like receiving
// unexpected packet or packet with wrong header
// XXX -> ConnError{Op: "decode"} ?
// FIXME -> ConnError{Op: "decode"}
type ProtoError struct {
Conn *Conn
Err error
......@@ -80,8 +80,8 @@ func (e *ProtoError) Error() string {
// Expect receives 1 packet and expects it to be exactly of msg type
// XXX naming (-> Recv1 ?)
func Expect(conn *Conn, msg Pkt) (err error) {
pkt, err := conn.Recv()
func Expect(conn *Conn, msg Msg) (err error) {
pkt, err := conn.recvPkt()
if err != nil {
return err
}
......@@ -92,11 +92,11 @@ func Expect(conn *Conn, msg Pkt) (err error) {
pkth := pkt.Header()
msgCode := ntoh16(pkth.MsgCode)
if msgCode != msg.NEOPktMsgCode() {
if msgCode != msg.NEOMsgCode() {
// unexpected Error response
if msgCode == (&Error{}).NEOPktMsgCode() {
if msgCode == (&Error{}).NEOMsgCode() {
errResp := Error{}
_, err = errResp.NEOPktDecode(pkt.Payload())
_, err = errResp.NEOMsgDecode(pkt.Payload())
if err != nil {
return &ProtoError{conn, err}
}
......@@ -108,7 +108,7 @@ func Expect(conn *Conn, msg Pkt) (err error) {
return ErrDecode(&errResp) // XXX err ctx vs ^^^ errcontextf ?
}
msgType := pktTypeRegistry[msgCode]
msgType := msgTypeRegistry[msgCode]
if msgType == nil {
return &ProtoError{conn, fmt.Errorf("invalid msgCode (%d)", msgCode)}
}
......@@ -116,7 +116,7 @@ func Expect(conn *Conn, msg Pkt) (err error) {
return &ProtoError{conn, fmt.Errorf("unexpected packet: %v", msgType)}
}
_, err = msg.NEOPktDecode(pkt.Payload())
_, err = msg.NEOMsgDecode(pkt.Payload())
if err != nil {
return &ProtoError{conn, err}
}
......
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