From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=DATE_IN_PAST_96_XX, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04055C4CEC6 for ; Thu, 12 Sep 2019 17:28:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C829220856 for ; Thu, 12 Sep 2019 17:28:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="beHXutpl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387622AbfILR2z (ORCPT ); Thu, 12 Sep 2019 13:28:55 -0400 Received: from smtp-fw-2101.amazon.com ([72.21.196.25]:44567 "EHLO smtp-fw-2101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387598AbfILR2x (ORCPT ); Thu, 12 Sep 2019 13:28:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1568309333; x=1599845333; h=message-id:in-reply-to:references:from:date:subject:to: mime-version; bh=AGAO4q+sahYkfsrmsJLVcWrv5VJxiw7TVhVh6xK5AXY=; b=beHXutplI5rDNUk7DBJ6SuCpd1q4irB1Sz9bjzXsQApnUpwVx3TtKhv3 T2P6K6ukB+5A4KatdMSqgvAIIX6ly0+Od8Uy6oOIuFFgc5U47y0sChGEh EqYuYj182FOfCvJvIeY4fZViscM+dPb7lTGRpbDxewCMXl/uJ7y6CzEs8 Y=; X-IronPort-AV: E=Sophos;i="5.64,497,1559520000"; d="scan'208";a="750440659" Received: from iad6-co-svc-p1-lb1-vlan2.amazon.com (HELO email-inbound-relay-2a-d0be17ee.us-west-2.amazon.com) ([10.124.125.2]) by smtp-border-fw-out-2101.iad2.amazon.com with ESMTP; 12 Sep 2019 17:28:52 +0000 Received: from EX13MTAUEB001.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2a-d0be17ee.us-west-2.amazon.com (Postfix) with ESMTPS id E9216A23A6; Thu, 12 Sep 2019 17:28:51 +0000 (UTC) Received: from EX13D01UEB002.ant.amazon.com (10.43.60.219) by EX13MTAUEB001.ant.amazon.com (10.43.60.96) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Thu, 12 Sep 2019 17:28:51 +0000 Received: from EX13MTAUEB001.ant.amazon.com (10.43.60.96) by EX13D01UEB002.ant.amazon.com (10.43.60.219) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Thu, 12 Sep 2019 17:28:51 +0000 Received: from kaos-source-ops-60003.pdx1.corp.amazon.com (10.36.133.164) by mail-relay.amazon.com (10.43.60.129) with Microsoft SMTP Server id 15.0.1367.3 via Frontend Transport; Thu, 12 Sep 2019 17:28:51 +0000 Received: by kaos-source-ops-60003.pdx1.corp.amazon.com (Postfix, from userid 6262777) id E1935C053D; Thu, 12 Sep 2019 17:28:49 +0000 (UTC) Message-ID: <11fbf78833638e57b76950a74998b0c489fb3020.1568309119.git.fllinden@amazon.com> In-Reply-To: References: From: Frank van der Linden Date: Sat, 31 Aug 2019 19:00:31 +0000 Subject: [RFC PATCH 22/35] nfsd: split off the write decode code in to a seperate function To: , MIME-Version: 1.0 Content-Type: text/plain Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org nfs4_decode_write has code to parse incoming XDR write data in to a kvec head, and a list of pages. Put this code in to a seperate function, so that it can be used later by the xattr code, for setxattr. No functional change. Signed-off-by: Frank van der Linden --- fs/nfsd/nfs4xdr.c | 72 +++++++++++++++++++++++++++-------------------- 1 file changed, 42 insertions(+), 30 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index f2090f7fed42..25cd597f7b4e 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -248,6 +248,44 @@ svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) return p; } +static __be32 +svcxdr_construct_vector(struct nfsd4_compoundargs *argp, struct kvec *head, + struct page ***pagelist, u32 buflen) +{ + int avail; + int len; + int pages; + + /* Sorry .. no magic macros for this.. * + * READ_BUF(write->wr_buflen); + * SAVEMEM(write->wr_buf, write->wr_buflen); + */ + avail = (char*)argp->end - (char*)argp->p; + if (avail + argp->pagelen < buflen) { + dprintk("NFSD: xdr error (%s:%d)\n", + __FILE__, __LINE__); + return nfserr_bad_xdr; + } + head->iov_base = argp->p; + head->iov_len = avail; + *pagelist = argp->pagelist; + + len = XDR_QUADLEN(buflen) << 2; + if (len >= avail) { + len -= avail; + + pages = len >> PAGE_SHIFT; + argp->pagelist += pages; + argp->pagelen -= pages * PAGE_SIZE; + len -= pages * PAGE_SIZE; + + next_decode_page(argp); + } + argp->p += XDR_QUADLEN(len); + + return 0; +} + /** * savemem - duplicate a chunk of memory for later processing * @argp: NFSv4 compound argument structure to be freed with @@ -1251,8 +1289,6 @@ nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify static __be32 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) { - int avail; - int len; DECODE_HEAD; status = nfsd4_decode_stateid(argp, &write->wr_stateid); @@ -1265,34 +1301,10 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) goto xdr_error; write->wr_buflen = be32_to_cpup(p++); - /* Sorry .. no magic macros for this.. * - * READ_BUF(write->wr_buflen); - * SAVEMEM(write->wr_buf, write->wr_buflen); - */ - avail = (char*)argp->end - (char*)argp->p; - if (avail + argp->pagelen < write->wr_buflen) { - dprintk("NFSD: xdr error (%s:%d)\n", - __FILE__, __LINE__); - goto xdr_error; - } - write->wr_head.iov_base = p; - write->wr_head.iov_len = avail; - write->wr_pagelist = argp->pagelist; - - len = XDR_QUADLEN(write->wr_buflen) << 2; - if (len >= avail) { - int pages; - - len -= avail; - - pages = len >> PAGE_SHIFT; - argp->pagelist += pages; - argp->pagelen -= pages * PAGE_SIZE; - len -= pages * PAGE_SIZE; - - next_decode_page(argp); - } - argp->p += XDR_QUADLEN(len); + status = svcxdr_construct_vector(argp, &write->wr_head, + &write->wr_pagelist, write->wr_buflen); + if (status) + return status; DECODE_TAIL; } -- 2.17.2