From patchwork Sun Sep 27 22:09:27 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7274131 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 323989F1D5 for ; Sun, 27 Sep 2015 22:18:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4AB0E20803 for ; Sun, 27 Sep 2015 22:18:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6853420713 for ; Sun, 27 Sep 2015 22:18:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932219AbbI0WNO (ORCPT ); Sun, 27 Sep 2015 18:13:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51666 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932167AbbI0WNM (ORCPT ); Sun, 27 Sep 2015 18:13:12 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id 12A4C8CF55; Sun, 27 Sep 2015 22:13:12 +0000 (UTC) Received: from nuc.home.com (vpn1-4-81.ams2.redhat.com [10.36.4.81]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t8RM9ce6030610; Sun, 27 Sep 2015 18:13:07 -0400 From: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org Subject: [PATCH v8 36/41] sunrpc: Add xdr_init_encode_pages Date: Mon, 28 Sep 2015 00:09:27 +0200 Message-Id: <1443391772-10171-37-git-send-email-agruenba@redhat.com> In-Reply-To: <1443391772-10171-1-git-send-email-agruenba@redhat.com> References: <1443391772-10171-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Initialize xdr_stream and xdr_buf from a pages array, for encoding into the pages. Signed-off-by: Andreas Gruenbacher --- include/linux/sunrpc/xdr.h | 2 ++ net/sunrpc/xdr.c | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 70c6b92..2c99cff 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -214,6 +214,8 @@ typedef void (*kxdreproc_t)(void *rqstp, struct xdr_stream *xdr, void *obj); typedef int (*kxdrdproc_t)(void *rqstp, struct xdr_stream *xdr, void *obj); extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p); +extern void xdr_init_encode_pages(struct xdr_stream *xdr, struct xdr_buf *buf, + struct page **pages, unsigned int len); extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes); extern void xdr_commit_encode(struct xdr_stream *xdr); extern void xdr_truncate_encode(struct xdr_stream *xdr, size_t len); diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 63c1c36..f97b96b 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -483,6 +483,31 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) EXPORT_SYMBOL_GPL(xdr_init_encode); /** + * xdr_init_encode_pages - Initialize struct xdr_stream for encoding into pages + * @xdr: pointer to xdr_stream struct + * @buf: pointer to XDR buffer in which to encode data + * @pages: pages array in which to encode + * @len: maximum length of @buf + * + * Initialize @xdr and @buf for encoding into the @pages array. If a + * page in @pages is NULL, it will be allocated on demand. + */ +void xdr_init_encode_pages(struct xdr_stream *xdr, struct xdr_buf *buf, + struct page **pages, unsigned int len) +{ + memset(buf, 0, sizeof(*buf)); + buf->pages = pages; + buf->page_len = len; + buf->buflen = len; + + memset(xdr, 0, sizeof(*xdr)); + xdr->buf = buf; + xdr->iov = buf->head; + xdr->page_ptr = pages - 1; +} +EXPORT_SYMBOL_GPL(xdr_init_encode_pages); + +/** * xdr_commit_encode - Ensure all data is written to buffer * @xdr: pointer to xdr_stream *