cifs: translate network errors on send to -ECONNABORTED

When the network stack returns various errors, we today bubble
up the error to the user (in case of soft mounts).

This change translates all network errors except -EINTR and
-EAGAIN to -ECONNABORTED. A similar approach is taken when
we receive network errors when reading from the socket.

The change also forces the cifsd thread to reconnect during
it's next activity.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c
index 8695c9961f5aa3a16895b5746db4427e933c0708..e00278fcfa4fa65f063430001c5506e3a2906358 100644 (file)
--- a/fs/smb/client/transport.c
+++ b/fs/smb/client/transport.c
@@ -400,10 +400,17 @@ unmask:
                                                  server->conn_id, server->hostname);
        }
 smbd_done:
-       if (rc < 0 && rc != -EINTR)
+       /*
+        * there's hardly any use for the layers above to know the
+        * actual error code here. All they should do at this point is
+        * to retry the connection and hope it goes away.
+        */
+       if (rc < 0 && rc != -EINTR && rc != -EAGAIN) {
                cifs_server_dbg(VFS, "Error %d sending data on socket to server\n",
                         rc);
-       else if (rc > 0)
+               rc = -ECONNABORTED;
+               cifs_signal_cifsd_for_reconnect(server, false);
+       } else if (rc > 0)
                rc = 0;
 out:
        cifs_in_send_dec(server);