From patchwork Sat Sep 8 02:13:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 967548 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=) 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 426dGD4d49z9s3Z for ; Sat, 8 Sep 2018 12:16:20 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726795AbeIHG7R (ORCPT ); Sat, 8 Sep 2018 02:59:17 -0400 Received: from a2nlsmtp01-04.prod.iad2.secureserver.net ([198.71.225.38]:36876 "EHLO a2nlsmtp01-04.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726534AbeIHG7Q (ORCPT ); Sat, 8 Sep 2018 02:59:16 -0400 Received: from linuxonhyperv2.linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with ESMTP id ySlafkWhT4ToEySlafAVgn; Fri, 07 Sep 2018 19:14:30 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv2.linuxonhyperv.com with local (Exim 4.91) (envelope-from ) id 1fySla-0005EI-3m; Fri, 07 Sep 2018 19:14:30 -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 Cc: Long Li Subject: [Patch v3 09/16] CIFS: SMBD: Support page offset in RDMA recv Date: Sat, 8 Sep 2018 02:13:41 +0000 Message-Id: <20180908021348.19956-10-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180908021348.19956-1-longli@linuxonhyperv.com> References: <20180908021348.19956-1-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com X-CMAE-Envelope: MS4wfCS9wzXg1gTRap0zIXqhWFNyN1nJ+32h/X6IlVi+4Kct8tkJeUGMzQkzt5lLPhsz/xIsCl8nloz53ZCrwkH3nsnHhSCBUXGgSGM3WNYQy/iRoCRHEtRz Mz62Gze3exB1gPbfhQkOd7n3T3bsrZCp3p7KdVQ6Ac0UHkFTKeh2UITay0TH7pWrOeuGX/ubuCpL6Kf12tBir7iMP5qUyejEF54aVZt5AbASIiqUOPv8jhOx 0UM21EwVUd/XfM9iy5x3u/G+YJ1DwiBE5XO6LkwV1TAI0CHUDwrTs8dsSLssVLO1P92E2UqBPhWK2N5K1MWHf3x8zd07/6DmTdFPU11l9chVvfpPmKZt37lI WyP/+LHPKnVDgurwKMvlRWfKnmFPHlVV8FeaMMc0dv+YgqApS0gnW6AMC1WrUCb2r0WWS0HJ Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org From: Long Li RDMA recv function needs to place data to the correct place starting at page offset. Signed-off-by: Long Li --- fs/cifs/smbdirect.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index 6141e3c..ba53c52 100644 --- a/fs/cifs/smbdirect.c +++ b/fs/cifs/smbdirect.c @@ -2004,10 +2004,12 @@ static int smbd_recv_buf(struct smbd_connection *info, char *buf, * return value: actual data read */ static int smbd_recv_page(struct smbd_connection *info, - struct page *page, unsigned int to_read) + struct page *page, unsigned int page_offset, + unsigned int to_read) { int ret; char *to_address; + void *page_address; /* make sure we have the page ready for read */ ret = wait_event_interruptible( @@ -2015,16 +2017,17 @@ static int smbd_recv_page(struct smbd_connection *info, info->reassembly_data_length >= to_read || info->transport_status != SMBD_CONNECTED); if (ret) - return 0; + return ret; /* now we can read from reassembly queue and not sleep */ - to_address = kmap_atomic(page); + page_address = kmap_atomic(page); + to_address = (char *) page_address + page_offset; log_read(INFO, "reading from page=%p address=%p to_read=%d\n", page, to_address, to_read); ret = smbd_recv_buf(info, to_address, to_read); - kunmap_atomic(to_address); + kunmap_atomic(page_address); return ret; } @@ -2038,7 +2041,7 @@ int smbd_recv(struct smbd_connection *info, struct msghdr *msg) { char *buf; struct page *page; - unsigned int to_read; + unsigned int to_read, page_offset; int rc; info->smbd_recv_pending++; @@ -2052,15 +2055,16 @@ int smbd_recv(struct smbd_connection *info, struct msghdr *msg) case READ | ITER_BVEC: page = msg->msg_iter.bvec->bv_page; + page_offset = msg->msg_iter.bvec->bv_offset; to_read = msg->msg_iter.bvec->bv_len; - rc = smbd_recv_page(info, page, to_read); + rc = smbd_recv_page(info, page, page_offset, to_read); break; default: /* It's a bug in upper layer to get there */ cifs_dbg(VFS, "CIFS: invalid msg type %d\n", msg->msg_iter.type); - rc = -EIO; + rc = -EINVAL; } info->smbd_recv_pending--;