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add ability to specify sgid number #1

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7fa22d1
add ability to specify sgid number
Feb 10, 2026
96eb80f
rename module
Feb 11, 2026
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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ go.work
!.vscode/launch.json
!.vscode/extensions.json
!.vscode/*.code-snippets
.idea

# Local History for Visual Studio Code
.history/
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28 changes: 14 additions & 14 deletions cmd/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,11 +7,17 @@ import (
"math/rand"
"time"

"github.com/liver/gordma"
"github.com/ivagulin/gordma"
)

func main() {
c, err := gordma.NewRdmaContext("", 1, 0, gordma.IBV_MTU_4096)
isServer := flag.Bool("s", false, "init server")
server := flag.String("a", "localhost", "addr to bind/connect to")
port := flag.Int("p", 8008, "port to bind/connect to")
sgid := flag.Int("g", 0, "sgid to use")
flag.Parse()

c, err := gordma.NewRdmaContext("", 1, *sgid, gordma.IBV_MTU_4096)
if err != nil {
panic(err)
}
Expand All @@ -34,24 +40,18 @@ func main() {
panic(err)
}

isServer := flag.Bool("s", false, "")
flag.Parse()

server := "localhost"
port := 8008

if *isServer {
portSelection := make(chan int, 1)
go func (p chan int) {
go func(p chan int) {
fmt.Printf("rdma server port: %d\n", <-p)
}(portSelection)
c, err := gordma.ConnectQpServer(c, qp, mr, port, portSelection)
c, err := gordma.ConnectQpServer(c, qp, mr, *port, portSelection, uint8(*sgid))
if err != nil {
panic(err)
}
defer c.Close()
} else {
c, err := gordma.ConnectQpClient(c, qp, mr, server, port)
c, err := gordma.ConnectQpClient(c, qp, mr, *server, *port, uint8(*sgid))
if err != nil {
panic(err)
}
Expand Down Expand Up @@ -113,7 +113,7 @@ func runServer(qp *gordma.QueuePair, mr *gordma.MemoryRegion) error {
(*localNotice)[1] = byte(rand.Intn(9))
(*localNotice)[2] = byte(rand.Intn(9))
fmt.Printf("from server S: %d%d%d\n", (*mr.Notice())[0], (*mr.Notice())[1], (*mr.Notice())[2])

time.Sleep(time.Second)
wr_id, err = qp.PostSend(swr)
if err != nil {
Expand Down Expand Up @@ -168,7 +168,7 @@ func runClient(qp *gordma.QueuePair, mr *gordma.MemoryRegion) error {

rwr := gordma.NewReceiveWorkRequest(mr)
defer rwr.Close()

wr_id, err = qp.PostReceive(rwr)
if err != nil {
return fmt.Errorf("PostReceive failed: %v\n", err)
Expand All @@ -184,7 +184,7 @@ func runClient(qp *gordma.QueuePair, mr *gordma.MemoryRegion) error {
fmt.Printf("PostReceive WaitForCompletionId %d cs:%v\n", wr_id, cs)

fmt.Printf("from server R: %d%d%d\n", (*mr.Notice())[0], (*mr.Notice())[1], (*mr.Notice())[2])

for {
if (*mr.Notice())[0] == 1 {
break
Expand Down
2 changes: 1 addition & 1 deletion go.mod
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
module github.com/liver/gordma
module github.com/ivagulin/gordma

go 1.16

Expand Down
20 changes: 10 additions & 10 deletions qp.go
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Original file line number Diff line number Diff line change
Expand Up @@ -117,7 +117,7 @@ func (q *QueuePair) Init() error {
}

// Ready2Receive RTR
func (q *QueuePair) Ready2Receive(mtu uint32, destGidLocal uint16, destGidGlobal [16]byte, destQpn, destPsn uint32) error {
func (q *QueuePair) Ready2Receive(mtu uint32, destGidLocal uint16, destGidGlobal [16]byte, destQpn, destPsn uint32, sgid uint8) error {
attr := C.struct_ibv_qp_attr{}
attr.qp_state = C.IBV_QPS_RTR
attr.path_mtu = mtu
Expand All @@ -133,19 +133,19 @@ func (q *QueuePair) Ready2Receive(mtu uint32, destGidLocal uint16, destGidGlobal
attr.ah_attr.src_path_bits = 0
attr.ah_attr.port_num = C.uint8_t(q.port)
mask := C.IBV_QP_STATE | C.IBV_QP_AV | C.IBV_QP_PATH_MTU | C.IBV_QP_DEST_QPN |
C.IBV_QP_RQ_PSN | C.IBV_QP_MAX_DEST_RD_ATOMIC | C.IBV_QP_MIN_RNR_TIMER
C.IBV_QP_RQ_PSN | C.IBV_QP_MAX_DEST_RD_ATOMIC | C.IBV_QP_MIN_RNR_TIMER

// for Soft-RoCE (aka RXE)
attr.ah_attr.is_global = 1
attr.ah_attr.grh.dgid = destGidGlobal
attr.ah_attr.grh.flow_label = 0;
attr.ah_attr.grh.hop_limit = 1;
attr.ah_attr.grh.sgid_index = C.uint8_t(0)
attr.ah_attr.grh.traffic_class = 0;
attr.ah_attr.grh.flow_label = 0
attr.ah_attr.grh.hop_limit = 1
attr.ah_attr.grh.sgid_index = C.uint8_t(sgid)
attr.ah_attr.grh.traffic_class = 0
//

return q.modify(&attr, mask)

}

// Ready2Send RTS
Expand Down Expand Up @@ -241,7 +241,7 @@ func (q *QueuePair) PostWriteImm(wr *SendWorkRequest, memType Type, imm uint32,

if imm > 0 {
wr.sendWr.send_flags = 0
}else {
} else {
wr.sendWr.send_flags = IBV_SEND_SIGNALED
}

Expand Down Expand Up @@ -309,7 +309,7 @@ func (q *QueuePair) PostRead(wr *SendWorkRequest, memType Type, udl int) (uint64
binary.LittleEndian.PutUint64(wr.sendWr.wr[:8], wr.mr.NoticeRemoteAddr())
binary.LittleEndian.PutUint32(wr.sendWr.wr[8:12], wr.mr.NoticeRemoteKey())
}

wr.sendWr.sg_list = wr.sge
wr.sendWr.num_sge = 1
wr.sendWr.next = nil
Expand Down
14 changes: 7 additions & 7 deletions sock.go
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Original file line number Diff line number Diff line change
Expand Up @@ -12,11 +12,11 @@ import (

var SockSyncMsg string = "sync"

func ConnectQpClient(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, server string, port int) (net.Conn, error) {
func ConnectQpClient(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, server string, port int, sgid uint8) (net.Conn, error) {
if server == "" {
server = "localhost"
}

c, err := net.Dial("tcp", net.JoinHostPort(server, fmt.Sprintf("%d", port)))
if err != nil {
return nil, err
Expand Down Expand Up @@ -74,7 +74,7 @@ func ConnectQpClient(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, server s
MTU: NetToHostLong(bufQpInfo.MTU),
}

err = modify_qp_to_rts(qp, mr.qp.MTU, mr.qp.Lid, mr.qp.Gid, mr.qp.QpNum, mr.qp.Psn)
err = modify_qp_to_rts(qp, mr.qp.MTU, mr.qp.Lid, mr.qp.Gid, mr.qp.QpNum, mr.qp.Psn, sgid)
if err != nil {
c.Close()
return nil, err
Expand All @@ -95,7 +95,7 @@ func ConnectQpClient(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, server s
return c, nil
}

func ConnectQpServer(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, port int, portSelection chan int) (net.Conn, error) {
func ConnectQpServer(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, port int, portSelection chan int, sgid uint8) (net.Conn, error) {
if port < 0 {
port = 0
}
Expand Down Expand Up @@ -167,7 +167,7 @@ func ConnectQpServer(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, port int
MTU: uint32(ctx.IBV_MTU),
}

err = modify_qp_to_rts(qp, mr.qp.MTU, mr.qp.Lid, mr.qp.Gid, mr.qp.QpNum, mr.qp.Psn)
err = modify_qp_to_rts(qp, mr.qp.MTU, mr.qp.Lid, mr.qp.Gid, mr.qp.QpNum, mr.qp.Psn, sgid)
if err != nil {
c.Close()
return nil, err
Expand All @@ -188,13 +188,13 @@ func ConnectQpServer(ctx *RdmaContext, qp *QueuePair, mr *MemoryRegion, port int
return c, nil
}

func modify_qp_to_rts(qp *QueuePair, mtu uint32, destLid uint16, destGid [16]byte, destQpNum uint32, destPsn uint32) error {
func modify_qp_to_rts(qp *QueuePair, mtu uint32, destLid uint16, destGid [16]byte, destQpNum uint32, destPsn uint32, sgid uint8) error {
err := qp.Init()
if err != nil {
return err
}

err = qp.Ready2Receive(mtu, destLid, destGid, destQpNum, destPsn)
err = qp.Ready2Receive(mtu, destLid, destGid, destQpNum, destPsn, sgid)
if err != nil {
return err
}
Expand Down