From patchwork Tue Jun 25 23:02:53 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Adamson X-Patchwork-Id: 2781361 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 625889F968 for ; Tue, 25 Jun 2013 23:03:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 896862026C for ; Tue, 25 Jun 2013 23:03:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A36320271 for ; Tue, 25 Jun 2013 23:03:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751244Ab3FYXDO (ORCPT ); Tue, 25 Jun 2013 19:03:14 -0400 Received: from mx12.netapp.com ([216.240.18.77]:15583 "EHLO mx12.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751670Ab3FYXDO (ORCPT ); Tue, 25 Jun 2013 19:03:14 -0400 X-IronPort-AV: E=Sophos;i="4.87,940,1363158000"; d="scan'208";a="68782003" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx12-out.netapp.com with ESMTP; 25 Jun 2013 16:03:14 -0700 Received: from fc17-1.androsad.fake (vpn2ntap-406100.vpn.netapp.com [10.55.67.18]) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id r5PN3CC7021368; Tue, 25 Jun 2013 16:03:13 -0700 (PDT) From: andros@netapp.com To: trond.myklebust@netapp.com Cc: linux-nfs@vger.kernel.org, Andy Adamson Subject: [PATCH Version 2 1/3] NFSv4.1 Fix gdia_maxcount calculation to fit in ca_maxresponsesize Date: Tue, 25 Jun 2013 19:02:53 -0400 Message-Id: <1372201375-6686-2-git-send-email-andros@netapp.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1372201375-6686-1-git-send-email-andros@netapp.com> References: <1372201375-6686-1-git-send-email-andros@netapp.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-8.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 From: Andy Adamson The GETDEVICEINFO gdia_maxcount represents all of the data being returned within the GETDEVICEINFO4resok structure and includes the XDR overhead. The CREATE_SESSION ca_maxresponsesize is the maximum reply and includes the RPC headers (including security flavor credentials and verifiers). Split out the struct pnfs_device field maxcount which is the gdia_maxcount from the pglen field which is the reply (the total) buffer length. Signed-off-by: Andy Adamson --- fs/nfs/internal.h | 1 + fs/nfs/nfs4filelayoutdev.c | 1 + fs/nfs/nfs4xdr.c | 8 +++++++- fs/nfs/pnfs.h | 3 ++- 4 files changed, 11 insertions(+), 2 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 97ec2ef..3c8373f 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -255,6 +255,7 @@ extern int nfs4_decode_dirent(struct xdr_stream *, #ifdef CONFIG_NFS_V4_1 extern const u32 nfs41_maxread_overhead; extern const u32 nfs41_maxwrite_overhead; +extern const u32 nfs41_maxgetdevinfo_overhead; #endif /* nfs4proc.c */ diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c index 0493dbd..95604f6 100644 --- a/fs/nfs/nfs4filelayoutdev.c +++ b/fs/nfs/nfs4filelayoutdev.c @@ -711,6 +711,7 @@ filelayout_get_device_info(struct inode *inode, pdev->pgbase = 0; pdev->pglen = max_resp_sz; pdev->mincount = 0; + pdev->maxcount = max_resp_sz - nfs41_maxgetdevinfo_overhead; rc = nfs4_proc_getdeviceinfo(server, pdev, cred); dprintk("%s getdevice info returns %d\n", __func__, rc); diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 2a3f77e1..0abfb846 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -867,6 +867,12 @@ const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH + decode_sequence_maxsz + decode_putfh_maxsz) * XDR_UNIT); + +const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH + + compound_decode_hdr_maxsz + + decode_sequence_maxsz) * + XDR_UNIT); +EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead); #endif /* CONFIG_NFS_V4_1 */ static const umode_t nfs_type2fmt[] = { @@ -1924,7 +1930,7 @@ encode_getdeviceinfo(struct xdr_stream *xdr, p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data, NFS4_DEVICEID4_SIZE); *p++ = cpu_to_be32(args->pdev->layout_type); - *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */ + *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */ *p++ = cpu_to_be32(0); /* bitmap length 0 */ } diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 1441dff..a4f4181 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -149,9 +149,10 @@ struct pnfs_device { struct nfs4_deviceid dev_id; unsigned int layout_type; unsigned int mincount; + unsigned int maxcount; /* gdia_maxcount */ struct page **pages; unsigned int pgbase; - unsigned int pglen; + unsigned int pglen; /* reply buffer length */ }; #define NFS4_PNFS_GETDEVLIST_MAXNUM 16