From patchwork Sun Nov 5 05:43:55 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 10041993 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3D17D601EB for ; Sun, 5 Nov 2017 05:50:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 30A8A2962D for ; Sun, 5 Nov 2017 05:50:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 23DA729636; Sun, 5 Nov 2017 05:50:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7DD92962D for ; Sun, 5 Nov 2017 05:50:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752620AbdKEFtF (ORCPT ); Sun, 5 Nov 2017 01:49:05 -0400 Received: from a2nlsmtp01-05.prod.iad2.secureserver.net ([198.71.225.49]:50142 "EHLO a2nlsmtp01-05.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750910AbdKEFpx (ORCPT ); Sun, 5 Nov 2017 01:45:53 -0400 Received: from linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id BDjVeq3os3w7hBDjVeBCcv; Sat, 04 Nov 2017 22:44:52 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv.com with local (Exim 4.89) (envelope-from ) id 1eBDjU-0006FC-VL; Sat, 04 Nov 2017 22:44:33 -0700 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, Christoph Hellwig , Tom Talpey , Matthew Wilcox , Stephen Hemminger Cc: Long Li Subject: [Patch v6 13/22] CIFS: SMBD: Set SMB Direct maximum read or write size for I/O Date: Sat, 4 Nov 2017 22:43:55 -0700 Message-Id: <20171105054404.23886-14-longli@exchange.microsoft.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20171105054404.23886-1-longli@exchange.microsoft.com> References: <20171105054404.23886-1-longli@exchange.microsoft.com> X-CMAE-Envelope: MS4wfLHlPcPZlNTMHg7yASbLW4oC9KTbrQGvcKBH2RnKtJeGoEyp5sHzUIWrQtu8zCrVWXoJTB3Y5VBk1hoviiVxJI+dwrQuy5xVz8hZnvOIq5X5kjiIkImj Z9Dj+Y1Gtnp/bfVINTJlm4AyGoJ0DF6hdkFUuIHU9mYNZTzNyA5PGMhjLyyu4CUf+h2Lfj6nivd7YRNDJJ9uVsDNZng0cxYbTnFHUBotk+HmvprAaCh5wLix GACvf/+mIjh+9lEQttHrmPxbsiUfZZ4d+jSnfSGHL4gASbqZgOR45sqWi7PQ2CFiHS7IMBuUCaPp1WyHs1Yt+nN/PuLKc9JoZ6geRefvaWZ/6Q7gzrWJze5z YPYL85ZF1W8QUKVWU2lWR7OcS++3HMmS5tXRFRG65QBTXFA9Lx3LiireDf9u0ZPc5Vf0/r0BwhmwzI4QAQ2Vi4oOWzswuEnQgS6pjUvH0CQ4s22R7PFbj5Y5 nBlMWkJjYf6U38fgxbYYWR9k8mDYzRoOi+nUDg== Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Long Li When connecting over SMB Direct, the transport negotiates its maximum I/O sizes with the server and determines how to choose to do RDMA send/recv vs read/write. Expose these maximum I/O sizes to upper layer so we will get the correct sized payloads. Signed-off-by: Long Li --- fs/cifs/smb2ops.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index fb2934b..25028da 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -32,6 +32,9 @@ #include "smb2status.h" #include "smb2glob.h" #include "cifs_ioctl.h" +#ifdef CONFIG_CIFS_SMB_DIRECT +#include "smbdirect.h" +#endif static int change_conf(struct TCP_Server_Info *server) @@ -250,7 +253,11 @@ smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) /* start with specified wsize, or default */ wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE; wsize = min_t(unsigned int, wsize, server->max_write); - +#ifdef CONFIG_CIFS_SMB_DIRECT + if (server->rdma) + wsize = min_t(unsigned int, + wsize, server->smbd_conn->max_readwrite_size); +#endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); @@ -266,6 +273,11 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) /* start with specified rsize, or default */ rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE; rsize = min_t(unsigned int, rsize, server->max_read); +#ifdef CONFIG_CIFS_SMB_DIRECT + if (server->rdma) + rsize = min_t(unsigned int, + rsize, server->smbd_conn->max_readwrite_size); +#endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);