cifs: smbd: Indicate to retry on transport sending failure

Failure to send a packet doesn't mean it's a permanent failure, it can't be
returned to user process. This I/O should be retried or failed based on
server packet response and transport health. This logic is handled by the
upper layer.

Give this decision to upper layer.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index df95c7568445664a25483fcad97651147ceb3409..05b05e78f31bb8b912a4429eeb5db83e9f0efe08 100644 (file)
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -853,7 +853,7 @@ static int smbd_create_header(struct smbd_connection *info,
 
        if (info->transport_status != SMBD_CONNECTED) {
                log_outgoing(ERR, "disconnected not sending\n");
-               return -ENOENT;
+               return -EAGAIN;
        }
        atomic_dec(&info->send_credits);
 
@@ -979,6 +979,7 @@ static int smbd_post_send(struct smbd_connection *info,
                                wake_up(&info->wait_send_pending);
                }
                smbd_disconnect_rdma_connection(info);
+               rc = -EAGAIN;
        } else
                /* Reset timer for idle connection after packet is sent */
                mod_delayed_work(info->workqueue, &info->idle_timer_work,
@@ -2085,7 +2086,7 @@ int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst)
        int rc;
 
        if (info->transport_status != SMBD_CONNECTED) {
-               rc = -ENODEV;
+               rc = -EAGAIN;
                goto done;
        }