usage of deadline conn at Accept() breaks websocket (#19789)

fortunately not wired up to use, however if anyone
enables deadlines for conn then sporadically MinIO
startups fail.

cmd/common-main.go

@@ -407,10 +407,6 @@ func buildServerCtxt(ctx *cli.Context, ctxt *serverCtxt) (err error) {
 
 	ctxt.Interface = ctx.String("interface")
 	ctxt.UserTimeout = ctx.Duration("conn-user-timeout")
-	ctxt.ConnReadDeadline = ctx.Duration("conn-read-deadline")
-	ctxt.ConnWriteDeadline = ctx.Duration("conn-write-deadline")
-	ctxt.ConnClientReadDeadline = ctx.Duration("conn-client-read-deadline")
-	ctxt.ConnClientWriteDeadline = ctx.Duration("conn-client-write-deadline")
 	ctxt.SendBufSize = ctx.Int("send-buf-size")
 	ctxt.RecvBufSize = ctx.Int("recv-buf-size")
 

cmd/globals.go

@@ -160,12 +160,7 @@ type serverCtxt struct {
 	FTP  []string
 	SFTP []string
 
-	UserTimeout             time.Duration
-	ConnReadDeadline        time.Duration
-	ConnWriteDeadline       time.Duration
-	ConnClientReadDeadline  time.Duration
-	ConnClientWriteDeadline time.Duration
-
+	UserTimeout         time.Duration
 	ShutdownTimeout     time.Duration
 	IdleTimeout         time.Duration
 	ReadHeaderTimeout   time.Duration

cmd/server-main.go

@@ -103,32 +103,6 @@ var ServerFlags = []cli.Flag{
 		EnvVar: "MINIO_READ_HEADER_TIMEOUT",
 		Hidden: true,
 	},
-	cli.DurationFlag{
-		Name:   "conn-client-read-deadline",
-		Usage:  "custom connection READ deadline for incoming requests",
-		Hidden: true,
-		EnvVar: "MINIO_CONN_CLIENT_READ_DEADLINE",
-	},
-	cli.DurationFlag{
-		Name:   "conn-client-write-deadline",
-		Usage:  "custom connection WRITE deadline for outgoing requests",
-		Hidden: true,
-		EnvVar: "MINIO_CONN_CLIENT_WRITE_DEADLINE",
-	},
-	cli.DurationFlag{
-		Name:   "conn-read-deadline",
-		Usage:  "custom connection READ deadline",
-		Hidden: true,
-		Value:  10 * time.Minute,
-		EnvVar: "MINIO_CONN_READ_DEADLINE",
-	},
-	cli.DurationFlag{
-		Name:   "conn-write-deadline",
-		Usage:  "custom connection WRITE deadline",
-		Hidden: true,
-		Value:  10 * time.Minute,
-		EnvVar: "MINIO_CONN_WRITE_DEADLINE",
-	},
 	cli.DurationFlag{
 		Name:   "conn-user-timeout",
 		Usage:  "custom TCP_USER_TIMEOUT for socket buffers",
@@ -440,12 +414,10 @@ func serverHandleCmdArgs(ctxt serverCtxt) {
 	setGlobalInternodeInterface(ctxt.Interface)
 
 	globalTCPOptions = xhttp.TCPOptions{
-		UserTimeout:        int(ctxt.UserTimeout.Milliseconds()),
-		ClientReadTimeout:  ctxt.ConnClientReadDeadline,
-		ClientWriteTimeout: ctxt.ConnClientWriteDeadline,
-		Interface:          ctxt.Interface,
-		SendBufSize:        ctxt.SendBufSize,
-		RecvBufSize:        ctxt.RecvBufSize,
+		UserTimeout: int(ctxt.UserTimeout.Milliseconds()),
+		Interface:   ctxt.Interface,
+		SendBufSize: ctxt.SendBufSize,
+		RecvBufSize: ctxt.RecvBufSize,
 	}
 
 	// allow transport to be HTTP/1.1 for proxying.

internal/http/dial_linux.go

@@ -39,10 +39,12 @@ func setTCPParametersFn(opts TCPOptions) func(network, address string, c syscall
 
 			_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
 
-			{
+			if opts.SendBufSize > 0 {
 				// Enable big buffers
 				_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_SNDBUF, opts.SendBufSize)
+			}
 
+			if opts.RecvBufSize > 0 {
 				_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_RCVBUF, opts.RecvBufSize)
 			}
 

internal/http/listener.go

@@ -22,9 +22,6 @@ import (
 	"fmt"
 	"net"
 	"syscall"
-	"time"
-
-	"github.com/minio/minio/internal/deadlineconn"
 )
 
 type acceptResult struct {
@@ -75,9 +72,7 @@ func (listener *httpListener) Accept() (conn net.Conn, err error) {
 	select {
 	case result, ok := <-listener.acceptCh:
 		if ok {
-			return deadlineconn.New(result.conn).
-				WithReadDeadline(listener.opts.ClientReadTimeout).
-				WithWriteDeadline(listener.opts.ClientWriteTimeout), result.err
+			return result.conn, result.err
 		}
 	case <-listener.ctx.Done():
 	}
@@ -122,12 +117,7 @@ func (listener *httpListener) Addrs() (addrs []net.Addr) {
 
 // TCPOptions specify customizable TCP optimizations on raw socket
 type TCPOptions struct {
-	UserTimeout int // this value is expected to be in milliseconds
-	// When the net.Conn is idle for more than ReadTimeout duration, we close the connection on the client proactively.
-	ClientReadTimeout time.Duration
-	// When the net.Conn is idle for more than WriteTimeout duration, we close the connection on the client proactively.
-	ClientWriteTimeout time.Duration
-
+	UserTimeout int              // this value is expected to be in milliseconds
 	SendBufSize int              // SO_SNDBUF size for the socket connection, NOTE: this sets server and client connection
 	RecvBufSize int              // SO_RECVBUF size for the socket connection, NOTE: this sets server and client connection
 	Interface   string           // This is a VRF device passed via `--interface` flag