From patchwork Wed May 30 19:47:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 10439785 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5320660535 for ; Wed, 30 May 2018 19:53:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 495F728A81 for ; Wed, 30 May 2018 19:53:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 47F2028A67; Wed, 30 May 2018 19:53:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BB7CA29453 for ; Wed, 30 May 2018 19:52:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932261AbeE3Ttz (ORCPT ); Wed, 30 May 2018 15:49:55 -0400 Received: from a2nlsmtp01-03.prod.iad2.secureserver.net ([198.71.225.37]:57164 "EHLO a2nlsmtp01-03.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932246AbeE3Ttu (ORCPT ); Wed, 30 May 2018 15:49:50 -0400 Received: from linuxonhyperv2.linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id O75KfmbumdjTiO75KfBjUv; Wed, 30 May 2018 12:48:48 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv2.linuxonhyperv.com with local (Exim 4.91) (envelope-from ) id 1fO75K-0008Fh-Ii; Wed, 30 May 2018 12:48:38 -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 v2 04/15] CIFS: Add support for direct pages in wdata Date: Wed, 30 May 2018 12:47:56 -0700 Message-Id: <20180530194807.31657-5-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180530194807.31657-1-longli@linuxonhyperv.com> References: <20180530194807.31657-1-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com X-CMAE-Envelope: MS4wfMwOmAkMxSfDSZc4tE7rTC1zDeJKOHQ44FWamfyw6kSwAtThgrWxri+wJQGRNWnyQZi7pgKyFhrTptpTAl9jCxoXVj25RoCRmF2dKnYKviCS7t67MU7q FDetk+PRaRooqGG4ZBHAoB9GtFSJgboMF5VMWhw4fXso3RM+KzHeNUdAsi66OiJKvsEWzOF7hp7mzjTvWcaztmdKdWrp65RPX9mKTAsgXIiv+xdT1GGuXaEF uEHffLCkQTOmSM4lxn4TE9U2U3BiFn8GdSWbRR9bzljpWl2oKOd0NWi4b2Xo+j48ZGseTSYWj2EVyTZsRJvxRV3vSgsgtF6CzR0M3xN4HpFpVAOGQ3gJ0mgx 5BNPxRXvGxJ3oDlQXIkdtoUeLgBll/zCas6Lz/8dWfIVjIVrS0vHhOHzSID3W/uyWa6tlJsN Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Long Li Add a function to allocate wdata without allocating pages for data transfer. This gives the caller an option to pass a number of pages that point to the data buffer to write to. wdata is reponsible for free those pages after it's done. Signed-off-by: Long Li --- fs/cifs/cifsglob.h | 2 +- fs/cifs/cifsproto.h | 2 ++ fs/cifs/cifssmb.c | 17 ++++++++++++++--- 3 files changed, 17 insertions(+), 4 deletions(-) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 56864a87..7f62c98 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1205,7 +1205,7 @@ struct cifs_writedata { unsigned int tailsz; unsigned int credits; unsigned int nr_pages; - struct page *pages[]; + struct page **pages; }; /* diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 1f27d8e..7933c5f 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -533,6 +533,8 @@ int cifs_async_writev(struct cifs_writedata *wdata, void cifs_writev_complete(struct work_struct *work); struct cifs_writedata *cifs_writedata_alloc(unsigned int nr_pages, work_func_t complete); +struct cifs_writedata *cifs_writedata_direct_alloc(struct page **pages, + work_func_t complete); void cifs_writedata_release(struct kref *refcount); int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index c8e4278..5aca336 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1952,6 +1952,7 @@ cifs_writedata_release(struct kref *refcount) if (wdata->cfile) cifsFileInfo_put(wdata->cfile); + kvfree(wdata->pages); kfree(wdata); } @@ -2075,12 +2076,22 @@ cifs_writev_complete(struct work_struct *work) struct cifs_writedata * cifs_writedata_alloc(unsigned int nr_pages, work_func_t complete) { + struct page **pages = + kzalloc(sizeof(struct page *) * nr_pages, GFP_NOFS); + if (pages) + return cifs_writedata_direct_alloc(pages, complete); + + return NULL; +} + +struct cifs_writedata * +cifs_writedata_direct_alloc(struct page **pages, work_func_t complete) +{ struct cifs_writedata *wdata; - /* writedata + number of page pointers */ - wdata = kzalloc(sizeof(*wdata) + - sizeof(struct page *) * nr_pages, GFP_NOFS); + wdata = kzalloc(sizeof(*wdata), GFP_NOFS); if (wdata != NULL) { + wdata->pages = pages; kref_init(&wdata->refcount); INIT_LIST_HEAD(&wdata->list); init_completion(&wdata->done);