Message ID | 20180530194807.31657-1-longli@linuxonhyperv.com |
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Headers | show
Return-Path: <linux-cifs-owner@vger.kernel.org> 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=<UNKNOWN>) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linuxonhyperv.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40x1TC1G5nz9s0q for <incoming@patchwork.ozlabs.org>; Thu, 31 May 2018 05:52:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932484AbeE3TwM (ORCPT <rfc822;incoming@patchwork.ozlabs.org>); Wed, 30 May 2018 15:52:12 -0400 Received: from a2nlsmtp01-04.prod.iad2.secureserver.net ([198.71.225.38]:60154 "EHLO a2nlsmtp01-04.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932248AbeE3Ttv (ORCPT <rfc822;linux-cifs@vger.kernel.org>); Wed, 30 May 2018 15:49:51 -0400 Received: from linuxonhyperv2.linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id O75Cf6FKPN7esO75Cf2xgf; Wed, 30 May 2018 12:48:50 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv2.linuxonhyperv.com with local (Exim 4.91) (envelope-from <longli@linuxonhyperv2.linuxonhyperv.com>) id 1fO75C-0008FH-2i; Wed, 30 May 2018 12:48:30 -0700 From: Long Li <longli@linuxonhyperv.com> To: Steve French <sfrench@samba.org>, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Long Li <longli@microsoft.com> Subject: [Patch v2 00/15] CIFS: Add direct I/O support Date: Wed, 30 May 2018 12:47:52 -0700 Message-Id: <20180530194807.31657-1-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.17.0 Reply-To: longli@microsoft.com X-CMAE-Envelope: MS4wfOXTRW/GUneQYLoecZdiasFtUNNpaLz/S4ZgqJTHTd47qxTI9hnEpOeZuC3eJfSjt+3HCyi7Xh8iGB7Q73GOCL/4yhlKfWu5dEKGWxcRadQzcMXOxlXd lPIyqCpuY3Fpk5GlN27fT/4RbBc0B//xwgIYBEpHh61YbXPQZH9qNQ0SFm9+zY23JX9QyDmh09Lvr526uu96D7CNyE7TXgRakqRr/NRMXz96JGtn/uOElhXq M2ZH3M+W6JmHn7pHE/2e7SgJfcvwrOKphbHscKRUo3LkP/RXske6Gvh00LaKe3acLBJjpWx8lp/Rwiremo1/KidT/AWevz1iZl6ZPygNImcHJad4Cs+PaBJ2 bcGEATleor/q1coFObJGUz+zC/Eu7P5xdGxb7g6wZRzx6okCjfRi5dJ2S08bNb1u6redKPed Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: <linux-cifs.vger.kernel.org> X-Mailing-List: linux-cifs@vger.kernel.org |
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CIFS: Add direct I/O support
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From: Long Li <longli@microsoft.com> This patch set implements direct I/O. In normal code path (even with cache=none), CIFS copies I/O data from user-space to kernel-space for security reasons of possible protocol required signing and encryption on user data. With this patch set, CIFS passes the I/O data directly from user-space buffer to the transport layer, when file system is mounted with "cache-none". Patch v2 addressed comments from Christoph Hellwig <hch@lst.de> and Tom Talpey <ttalpey@microsoft.com> to implement direct I/O for both socket and RDMA. Long Li (15): CIFS: Introduce offset for the 1st page in data transfer structures CIFS: Add support for direct pages in rdata CIFS: Use offset when reading pages CIFS: Add support for direct pages in wdata CIFS: Calculate the correct request length based on page offset and tail size CIFS: Introduce helper function to get page offset and length in smb_rqst CIFS: When sending data on socket, pass the correct page offset CIFS: SMBD: Support page offset in RDMA send CIFS: SMBD: Support page offset in RDMA recv CIFS: SMBD: Support page offset in memory registration CIFS: Pass page offset for calculating signature CIFS: Pass page offset for encrypting CIFS: Add support for direct I/O read CIFS: Add support for direct I/O write CIFS: Add direct I/O functions to file_operations fs/cifs/cifsencrypt.c | 9 +- fs/cifs/cifsfs.c | 5 +- fs/cifs/cifsfs.h | 2 + fs/cifs/cifsglob.h | 7 +- fs/cifs/cifsproto.h | 9 +- fs/cifs/cifssmb.c | 17 ++- fs/cifs/connect.c | 5 +- fs/cifs/file.c | 389 +++++++++++++++++++++++++++++++++++++++++++++++--- fs/cifs/misc.c | 17 +++ fs/cifs/smb2ops.c | 22 +-- fs/cifs/smb2pdu.c | 20 ++- fs/cifs/smbdirect.c | 121 ++++++++++------ fs/cifs/smbdirect.h | 2 +- fs/cifs/transport.c | 34 +++-- 14 files changed, 554 insertions(+), 105 deletions(-)