From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753425AbeEGWWL (ORCPT ); Mon, 7 May 2018 18:22:11 -0400 Received: from a2nlsmtp01-05.prod.iad2.secureserver.net ([198.71.225.49]:60958 "EHLO a2nlsmtp01-05.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753356AbeEGWVo (ORCPT ); Mon, 7 May 2018 18:21:44 -0400 x-originating-ip: 107.180.71.197 From: Long Li To: Steve French , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Long Li Subject: [PATCH 6/7] cifs: smbd: Retry on memory registration failure Date: Mon, 7 May 2018 15:20:05 -0700 Message-Id: <20180507222006.20781-6-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180507222006.20781-1-longli@linuxonhyperv.com> References: <20180507222006.20781-1-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com X-CMAE-Envelope: MS4wfBrIcZMnqS/l2sKVMJ8vd7oBENXuW8KQjEx/MllsKb9nN3rD58lYkss48R/aICJ5cqFS950xOkIID+IyNv2j48nJlb7NwJy6g2CfD5vhrhpOFnMn7oNd GUxbBnBxxvjuT98UK+q4v7m6kfH6dgJ75H88sBp0CTYZdYxkeVZtGjj23eRtuioCBzJrW6nf1cMcg1f7udSLx4jn0cyWdwaq+dw6CbzVmoP0sAQh7p9AaYko a0cG0q8iVQvsWC17pcCiiEuEfN2HeURdeUVG4yAcPqwHHrhHCbTr6oJ4BAeFDT63KNB8BXHiPeRmfa5gniaQBhBfkfw9tfrTmdd2/IcpvMae1OuaYjA+zM3N hFR3EBCLKK7hvN/MJtPen6PLZfNrzZztZYnXZ8ZGN/VxludGznFtoV5mHckhuZ9XSYjvLAZ9 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Long Li Memory registration failure doesn't mean this I/O has failed, it means the transport is hitting I/O error or needs reconnect. This error is not from the server. Indicate this error to upper layer, and let upper layer decide how to reconnect and proceed with this I/O. Signed-off-by: Long Li --- fs/cifs/smb2pdu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 09ca098..c72d1fa 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2617,7 +2617,7 @@ smb2_new_read_req(void **buf, unsigned int *total_len, true, need_invalidate); rcu_read_unlock(); if (!rdata->mr) - return -ENOBUFS; + return -EAGAIN; req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; if (need_invalidate) @@ -2997,7 +2997,7 @@ smb2_async_writev(struct cifs_writedata *wdata, false, need_invalidate); rcu_read_unlock(); if (!wdata->mr) { - rc = -ENOBUFS; + rc = -EAGAIN; goto async_writev_out; } req->Length = 0; -- 2.7.4