3 files changed, 24 insertions, 27 deletions
diff --git a/pkg/p9/client.go b/pkg/p9/client.go
index 2412aa5e1..221516c6c 100644
--- a/pkg/p9/client.go
+++ b/pkg/p9/client.go
@@ -505,12 +505,27 @@ func (c *Client) sendRecvChannel(t message, r message) error {
 			ch.active = false
 			c.channelsMu.Unlock()
 			c.channelsWg.Done()
-			return err
+			// Map all transport errors to EIO, but ensure that the real error
+			// is logged.
+			log.Warningf("p9.Client.sendRecvChannel: flipcall.Endpoint.Connect: %v", err)
+			return syscall.EIO
 		}
 	}
 
-	// Send the message.
-	err := ch.sendRecv(c, t, r)
+	// Send the request and receive the server's response.
+	rsz, err := ch.send(t)
+	if err != nil {
+		// See above.
+		c.channelsMu.Lock()
+		ch.active = false
+		c.channelsMu.Unlock()
+		c.channelsWg.Done()
+		log.Warningf("p9.Client.sendRecvChannel: p9.channel.send: %v", err)
+		return syscall.EIO
+	}
+
+	// Parse the server's response.
+	_, retErr := ch.recv(r, rsz)
 
 	// Release the channel.
 	c.channelsMu.Lock()
@@ -523,7 +538,7 @@ func (c *Client) sendRecvChannel(t message, r message) error {
 	c.channelsMu.Unlock()
 	c.channelsWg.Done()
 
-	return err
+	return retErr
 }
 
 // Version returns the negotiated 9P2000.L.Google version number.
diff --git a/pkg/p9/server.go b/pkg/p9/server.go
index 69c886a5d..e717e6161 100644
--- a/pkg/p9/server.go
+++ b/pkg/p9/server.go
@@ -452,7 +452,9 @@ func (cs *connState) initializeChannels() (err error) {
 		cs.channelWg.Add(1)
 		go func() { // S/R-SAFE: Server side.
 			defer cs.channelWg.Done()
-			res.service(cs)
+			if err := res.service(cs); err != nil {
+				log.Warningf("p9.channel.service: %v", err)
+			}
 		}()
 	}
 
diff --git a/pkg/p9/transport_flipcall.go b/pkg/p9/transport_flipcall.go
index 7cdf4ecc3..233f825e3 100644
--- a/pkg/p9/transport_flipcall.go
+++ b/pkg/p9/transport_flipcall.go
@@ -132,7 +132,7 @@ func (ch *channel) send(m message) (uint32, error) {
 	if filer, ok := m.(filer); ok {
 		if f := filer.FilePayload(); f != nil {
 			if err := ch.fds.SendFD(f.FD()); err != nil {
-				return 0, syscall.EIO // Map everything to EIO.
+				return 0, err
 			}
 			f.Close()     // Per sendRecvLegacy.
 			sentFD = true // To mark below.
@@ -162,15 +162,7 @@ func (ch *channel) send(m message) (uint32, error) {
 	}
 
 	// Perform the one-shot communication.
-	n, err := ch.data.SendRecv(ssz)
-	if err != nil {
-		if n > 0 {
-			return n, nil
-		}
-		return 0, syscall.EIO // See above.
-	}
-
-	return n, nil
+	return ch.data.SendRecv(ssz)
 }
 
 // recv decodes a message that exists on the channel.
@@ -249,15 +241,3 @@ func (ch *channel) recv(r message, rsz uint32) (message, error) {
 
 	return r, nil
 }
-
-// sendRecv sends the given message over the channel.
-//
-// This is used by the client.
-func (ch *channel) sendRecv(c *Client, m, r message) error {
-	rsz, err := ch.send(m)
-	if err != nil {
-		return err
-	}
-	_, err = ch.recv(r, rsz)
-	return err
-}