From patchwork Mon Mar 1 15:17:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever X-Patchwork-Id: 12110017 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 8C15AC433DB for ; Mon, 1 Mar 2021 15:18:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59FE264E22 for ; Mon, 1 Mar 2021 15:18:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237139AbhCAPSl (ORCPT ); Mon, 1 Mar 2021 10:18:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:41110 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235917AbhCAPSh (ORCPT ); Mon, 1 Mar 2021 10:18:37 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E56BD64DF5 for ; Mon, 1 Mar 2021 15:17:55 +0000 (UTC) Subject: [PATCH v1 26/42] NFSD: Update the NFSv2 READLINK result encoder to use struct xdr_stream From: Chuck Lever To: linux-nfs@vger.kernel.org Date: Mon, 01 Mar 2021 10:17:55 -0500 Message-ID: <161461187521.8508.11239790253687959788.stgit@klimt.1015granger.net> In-Reply-To: <161461145466.8508.13379815439337754427.stgit@klimt.1015granger.net> References: <161461145466.8508.13379815439337754427.stgit@klimt.1015granger.net> User-Agent: StGit/1.0-5-g755c MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Signed-off-by: Chuck Lever --- fs/nfsd/nfsproc.c | 5 +++-- fs/nfsd/nfsxdr.c | 26 ++++++++++++-------------- fs/nfsd/xdr.h | 1 + 3 files changed, 16 insertions(+), 16 deletions(-) diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c index 2ae6409ee39e..f55080482997 100644 --- a/fs/nfsd/nfsproc.c +++ b/fs/nfsd/nfsproc.c @@ -151,13 +151,14 @@ nfsd_proc_readlink(struct svc_rqst *rqstp) { struct nfsd_fhandle *argp = rqstp->rq_argp; struct nfsd_readlinkres *resp = rqstp->rq_resp; - char *buffer = page_address(*(rqstp->rq_next_page++)); dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); /* Read the symlink. */ resp->len = NFS_MAXPATHLEN; - resp->status = nfsd_readlink(rqstp, &argp->fh, buffer, &resp->len); + resp->page = *(rqstp->rq_next_page++); + resp->status = nfsd_readlink(rqstp, &argp->fh, + page_address(resp->page), &resp->len); fh_put(&argp->fh); return rpc_success; diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c index 989144b0d5be..74d9d11949c6 100644 --- a/fs/nfsd/nfsxdr.c +++ b/fs/nfsd/nfsxdr.c @@ -527,24 +527,22 @@ nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p) int nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p) { + struct xdr_stream *xdr = &rqstp->rq_res_stream; struct nfsd_readlinkres *resp = rqstp->rq_resp; struct kvec *head = rqstp->rq_res.head; - *p++ = resp->status; - if (resp->status != nfs_ok) - return xdr_ressize_check(rqstp, p); - - *p++ = htonl(resp->len); - xdr_ressize_check(rqstp, p); - rqstp->rq_res.page_len = resp->len; - if (resp->len & 3) { - /* need to pad the tail */ - rqstp->rq_res.tail[0].iov_base = p; - *p = 0; - rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); - } - if (svc_encode_result_payload(rqstp, head->iov_len, resp->len)) + if (!svcxdr_encode_stat(xdr, resp->status)) return 0; + switch (resp->status) { + case nfs_ok: + if (xdr_stream_encode_u32(xdr, resp->len) < 0) + return 0; + xdr_write_pages(xdr, &resp->page, 0, resp->len); + if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0) + return 0; + break; + } + return 1; } diff --git a/fs/nfsd/xdr.h b/fs/nfsd/xdr.h index a9b4ee6d098b..b868565c471f 100644 --- a/fs/nfsd/xdr.h +++ b/fs/nfsd/xdr.h @@ -94,6 +94,7 @@ struct nfsd_diropres { struct nfsd_readlinkres { __be32 status; int len; + struct page *page; }; struct nfsd_readres {