From patchwork Thu Nov 23 00:38:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 840626 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 3yj0vY4jLyz9s1h for ; Thu, 23 Nov 2017 11:44:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752903AbdKWAmi (ORCPT ); Wed, 22 Nov 2017 19:42:38 -0500 Received: from a2nlsmtp01-02.prod.iad2.secureserver.net ([198.71.225.36]:46944 "EHLO a2nlsmtp01-02.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752838AbdKWAkR (ORCPT ); Wed, 22 Nov 2017 19:40:17 -0500 Received: from linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id HfXbe7fYpDI9kHfXbeBrrc; Wed, 22 Nov 2017 17:39:15 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv.com with local (Exim 4.89) (envelope-from ) id 1eHfXb-0004T8-GO; Wed, 22 Nov 2017 17:38:55 -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 v8 06/16] CIFS: SMBD: Set SMB Direct maximum read or write size for I/O Date: Wed, 22 Nov 2017 17:38:39 -0700 Message-Id: <20171123003849.17093-7-longli@exchange.microsoft.com> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20171123003849.17093-1-longli@exchange.microsoft.com> References: <20171123003849.17093-1-longli@exchange.microsoft.com> X-CMAE-Envelope: MS4wfBWp8Bgo3v5QBFXXHx3s76OZSsgr+EXmkwyBfAen6+RjxjtQSIksw8e9qqt9P48q8Gt/67fvS1mRz52nNTXO3DbB2gFd1eUA5rli1eQsmO6I/fSRSJ1V c4Ud6OzAdspfBDgi8jHwKp4DQlxl9cr+gfhI9ZTdtQJBH092yNksqKVhXR+6BgFJrH3TO2UPwrRNzxQ8g5l8JuaGcoF+wyf5Feepza9Z+YKnMF+W409bOcJ3 z0DiZNJUGlli3euHr35VISsz2DYIqN0PiIQgUA6fgF0unHaeFbtjSJUx9R+tq8RPDHE1mvEcoHzaU4PRDcX1aH3rUHdR89GobDYufP9toVjn9SnrHWmLhZY6 M7dc41hij2Wd6bWbAS8zIIWXTRJWt1/BhaAlAw3nkhQrVJSx0wO3MBKC4rvqcfsLUJe16aMPH1ZBmnqH5TiJadjmddOPYHRZa1tNsuyz5mctO3XDzPCMaRDU vyOXASYdXPq8Nv8UoZkKro5lXoRf9pzgfpGuiQ== 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 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 | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index e067404..5e6a5e6 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) @@ -250,7 +251,11 @@ 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 +271,11 @@ 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);