From patchwork Tue Dec 16 19:01:50 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Haynes X-Patchwork-Id: 5503211 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 81B68BEEBA for ; Tue, 16 Dec 2014 19:03:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AA653209BD for ; Tue, 16 Dec 2014 19:03:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4E6120A18 for ; Tue, 16 Dec 2014 19:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750983AbaLPTDj (ORCPT ); Tue, 16 Dec 2014 14:03:39 -0500 Received: from mail-pa0-f50.google.com ([209.85.220.50]:60164 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751155AbaLPTDi (ORCPT ); Tue, 16 Dec 2014 14:03:38 -0500 Received: by mail-pa0-f50.google.com with SMTP id bj1so14748420pad.9 for ; Tue, 16 Dec 2014 11:03:38 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=OJbEe4Y1TKkVZFzoSXlIuu/0noS6X/vVWsah1RcAoCk=; b=auYGduaE+KiPw4ZVlbE5BlVyjqqrEbhF3VwzCbN2gPM2KoPZ3ByrOVZTGQsZOwbdo0 rvoc8Mnp3eyg/jqmD+mQOVdM24LFu2IXeROIVU80ROllgU4pnPkgNJqpFM7jluzYonpM 3KN2o38N9Revqm7NGWZ5oGbtjk+fFcOshgVu3dkOJICXrcDurle68lSXkMnA2LlqmSWG LhgQcj7SDopvucSDSovFEvHq0yrs9wXVlj7MIJ0cNI5rNCtsSeWmKqWvH+sns+DDIBw3 FEtP/mz1wcASl0+BklWIcgBleqBzIpFzC8yKjI3dlhFpSa5vUlXjTaJz11ZsWxO++x0t MiiA== X-Gm-Message-State: ALoCoQni6gOs3IUF8Dw/MBYpYbHpvVFH1z0eK77wMa478EQXLZ2umioUBEXqjWbkYdqVVYvPC6NM X-Received: by 10.70.128.80 with SMTP id nm16mr63836359pdb.1.1418756618084; Tue, 16 Dec 2014 11:03:38 -0800 (PST) Received: from localhost.localdomain ([50.242.95.105]) by mx.google.com with ESMTPSA id q4sm1620669pdh.79.2014.12.16.11.03.37 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Dec 2014 11:03:37 -0800 (PST) From: Tom Haynes X-Google-Original-From: Tom Haynes To: Trond Myklebust Cc: Linux NFS Mailing List Subject: [PATCH 47/50] nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags Date: Tue, 16 Dec 2014 11:01:50 -0800 Message-Id: <1418756513-95187-48-git-send-email-loghyr@primarydata.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1418756513-95187-1-git-send-email-loghyr@primarydata.com> References: <1418756513-95187-1-git-send-email-loghyr@primarydata.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=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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: Peng Tao Use it to indicate that LD wants to retry layoutget. LD can set it whenever it wants the common pnfs code to return and retry pnfs path through a new layout. The bit gets cleared when client does a new layoutget, when client closes the file (ROC case), or when kernel needs to evict the inode (non-ROC case). Signed-off-by: Peng Tao --- fs/nfs/pnfs.c | 3 +++ fs/nfs/pnfs.h | 18 ++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 9e7092f..fec1d897 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -617,6 +617,7 @@ pnfs_destroy_layout(struct nfs_inode *nfsi) pnfs_get_layout_hdr(lo); pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); + pnfs_clear_retry_layoutget(lo); spin_unlock(&nfsi->vfs_inode.i_lock); pnfs_free_lseg_list(&tmp_list); pnfs_put_layout_hdr(lo); @@ -1070,6 +1071,7 @@ bool pnfs_roc(struct inode *ino) if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) goto out_nolayout; + pnfs_clear_retry_layoutget(lo); list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { mark_lseg_invalid(lseg, &tmp_list); @@ -1497,6 +1499,7 @@ lookup_again: arg.length = PAGE_CACHE_ALIGN(arg.length); lseg = send_layoutget(lo, ctx, &arg, gfp_flags); + pnfs_clear_retry_layoutget(lo); atomic_dec(&lo->plh_outstanding); out_put_layout_hdr: if (first) { diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 04a5a31..67a436b 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -99,6 +99,7 @@ enum { NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */ NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ + NFS_LAYOUT_RETRY_LAYOUTGET, /* Retry layoutget */ }; enum layoutdriver_policy_flags { @@ -349,6 +350,23 @@ nfs4_get_deviceid(struct nfs4_deviceid_node *d) return d; } +static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo) +{ + if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) + atomic_inc(&lo->plh_refcount); +} + +static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo) +{ + if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) + atomic_dec(&lo->plh_refcount); +} + +static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo) +{ + return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags); +} + static inline struct pnfs_layout_segment * pnfs_get_lseg(struct pnfs_layout_segment *lseg) {