From patchwork Mon Oct 2 02:30:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 820346 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y55s54Kxyz9t42 for ; Mon, 2 Oct 2017 13:36:41 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752434AbdJBCgI (ORCPT ); Sun, 1 Oct 2017 22:36:08 -0400 Received: from a2nlsmtp01-03.prod.iad2.secureserver.net ([198.71.225.37]:53468 "EHLO a2nlsmtp01-03.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751720AbdJBCbz (ORCPT ); Sun, 1 Oct 2017 22:31:55 -0400 Received: from linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id yqVHdeTutHQ4gyqVHdXggt; Sun, 01 Oct 2017 19:30:53 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv.com with local (Exim 4.89) (envelope-from ) id 1dyqVH-0000xW-Sa; Sun, 01 Oct 2017 19:30:43 -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 Cc: Long Li Subject: [Patch v4 11/22] CIFS: SMBD: Set SMBDirect maximum read or write size for I/O Date: Sun, 1 Oct 2017 19:30:19 -0700 Message-Id: <20171002023030.3582-12-longli@exchange.microsoft.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20171002023030.3582-1-longli@exchange.microsoft.com> References: <20171002023030.3582-1-longli@exchange.microsoft.com> X-CMAE-Envelope: MS4wfChufiweeUbp9ATOic+IepjtJ80CCbiyrTZS2VS94Rl1Ll7wJjwh01ay8VLTIiWFQ1MUIKOQsRUiEN1arAwe3r4KqJnzmSPOLg25gPOmjOpv6u/sUPhF +OBpyAnMIq2SlRbZAsbNHf+94stmzq/zlCKu8mbAO32g7WkVQZBjc42g3MijZAl07JsJ4pzy0yRHVm8E0/g8Q1RRvYaj9gPOlFMC3PQbN/YR/RVNWYATWXWI 1bYwj/zS1SwAlQLMNnrN3Iv2GEP+KL68GL5JcMMr4tmGCzNmGwLBFcNOprPujl/hsz23AhuyAWAnwh6g5can52/GL4qH57q1XMuTp/Udp/QCdxyc17xp2J+G SerQSXCrd3OLPB2OhJj11JWvyDj5Ofiyh4C7kRMnIUTB7gV8bB9TvRZLVpEvvyzI/ztAFE22uPqoKAsqC4IHJ0J57RB9qEM7gwArwdD+a2ws76jM8p5TlJLB EnSOzrD4wKnHVdkh Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org From: Long Li When connecting over SMBDirect, 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 | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index fb2934b..7ad35d6 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -32,6 +32,7 @@ #include "smb2status.h" #include "smb2glob.h" #include "cifs_ioctl.h" +#include "smbdirect.h" static int change_conf(struct TCP_Server_Info *server) @@ -249,7 +250,11 @@ 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); + if (server->rdma) + wsize = min_t(unsigned int, + wsize, server->smbd_conn->max_readwrite_size); + else + wsize = min_t(unsigned int, wsize, server->max_write); if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); @@ -265,7 +270,11 @@ 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); + if (server->rdma) + rsize = min_t(unsigned int, + rsize, server->smbd_conn->max_readwrite_size); + else + rsize = min_t(unsigned int, rsize, server->max_read); if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);