From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752199AbeERAXg (ORCPT ); Thu, 17 May 2018 20:23:36 -0400 Received: from a2nlsmtp01-04.prod.iad2.secureserver.net ([198.71.225.38]:34646 "EHLO a2nlsmtp01-04.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751543AbeERAXe (ORCPT ); Thu, 17 May 2018 20:23:34 -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: [RFC PATCH 01/09] Introduce offset for the 1st page in data transfer structures Date: Thu, 17 May 2018 17:22:06 -0700 Message-Id: <20180518002214.5657-2-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180518002214.5657-1-longli@linuxonhyperv.com> References: <20180518002214.5657-1-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com X-CMAE-Envelope: MS4wfO8fZXtynARGtWqOPkeDrS6NM0lo4gYGp6bIh04vsq+9TnF/coRlOwVtuK8MPwQ0xdA+cZk+RALOKCuIpAgMvL4FiC0SNelO988/2pG837ivj7i7C7Bf QSty9VeeiLIt9LaiAtNow57C9YqIXKbASqruaOmQpH90xCf76RwxhGLsGFlProkAgaOlDb8NkdiO72JHC2koH2nxim2FWkU/T8rXJmMaLchSXYXzw7bLbNd0 lBnZcc9giiG7m4uBFWuMOKzw4npL1TeSsITOhdeTCEmK9kARX7uC07thTHAsYY/puVK+5nvdOs3mPmTxr/P8leKUcKHaEkJXSZzBUvJEuszbdfRscRu20QqW csA4oYkuP5v7DSH6bctpPyAdyGqk8fTCoc/trd5JSiRsyf/TxW6Nrh6VwAdnpSXbwjY2OvmG Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Long Li Currently CIFS allocates its own pages for data transfer, they don't need offset since it's always 0 in the 1st page. Direct data transfer needs to define an offset because user-data may not start on the page boundary Signed-off-by: Long Li --- fs/cifs/cifsglob.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index cb950a5..a51855c 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -176,6 +176,7 @@ struct smb_rqst { struct kvec *rq_iov; /* array of kvecs */ unsigned int rq_nvec; /* number of kvecs in array */ struct page **rq_pages; /* pointer to array of page ptrs */ + unsigned int rq_offset; /* the offset to the 1st page */ unsigned int rq_npages; /* number pages in array */ unsigned int rq_pagesz; /* page size to use */ unsigned int rq_tailsz; /* length of last page */ @@ -1167,8 +1168,10 @@ struct cifs_readdata { struct kvec iov[2]; #ifdef CONFIG_CIFS_SMB_DIRECT struct smbd_mr *mr; + struct page **direct_pages; #endif unsigned int pagesz; + unsigned int page_offset; unsigned int tailsz; unsigned int credits; unsigned int nr_pages; @@ -1192,8 +1195,10 @@ struct cifs_writedata { int result; #ifdef CONFIG_CIFS_SMB_DIRECT struct smbd_mr *mr; + struct page **direct_pages; #endif unsigned int pagesz; + unsigned int page_offset; unsigned int tailsz; unsigned int credits; unsigned int nr_pages; -- 2.7.4