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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 9ABDDC41514 for ; Tue, 13 Aug 2019 14:30:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7087C2067D for ; Tue, 13 Aug 2019 14:30:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LVlvTGVL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729151AbfHMOaT (ORCPT ); Tue, 13 Aug 2019 10:30:19 -0400 Received: from mail-ot1-f66.google.com ([209.85.210.66]:45724 "EHLO mail-ot1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729304AbfHMOaT (ORCPT ); Tue, 13 Aug 2019 10:30:19 -0400 Received: by mail-ot1-f66.google.com with SMTP id m24so20201652otp.12 for ; Tue, 13 Aug 2019 07:30:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=SiL+a7lRBWw/WXuYuTmPPutdryUa+IHhCb6r6X2Z8Z4=; b=LVlvTGVLGFmcnZ2trCrIFNFC3W7iPwFqtLt4S2xvUoAq1Vcb+SuM7phbi+XNdBh5Pw SVzjGMM3Pr8AgjTFUkA+0DosYN5WUiu7RID3AH1a34qXYtTNTj3FGhBfZFlbjangmf4z nyhRi1OG6NPL2ghR90sjhqjkHMOrmERlzrI7Qzs0e3OaAwBd04ijJTL6aQ5QFkMYd4FL WErKjj5arFybyTmMMTxYmTyOrca5ogiqHn42F84jpaoAzMMJa6EbdPF86mobLA2p1gaj ZaTG4tTc85laodWImaPS6rPy+we9Q2WO5QGH2TTPWnDkPmzGOYiq004xpFv6qQau7TAU 6/Jg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=SiL+a7lRBWw/WXuYuTmPPutdryUa+IHhCb6r6X2Z8Z4=; b=qaTcgdtiqGXQhQ7PwvmaIEJkqJcS0pg2CLCmW8Z6n4Yhk7Grt7L1DeBGlQbL/DQ/Jy ZSRPJl5OsD77h8dzoLxg/FSzGDCV2s6fS4gmEw6gKDE5F3fqV4vl5fBvcwBOxZz4vTwC LD57z0TmLTXsiosRSDqPIZkYJF9gs/eqW2sQIQu0k5Xax7qeJkaD9gVvbEuHKaNakODH fq73mCjJtvNie9jRdAPz/IjQCG2VAoZUHhyK5GoOsPaLe02lLElbSflC6XnZ0rvO9p+B Q+xMBZLbyDhlfmGFQ8aqEyiO8gBEekUJsOkLiVco3hV8y28ESLYsNWEmrPJZBlrztQlj 0BeQ== X-Gm-Message-State: APjAAAU/TZrXYxPIhbLyHhJbzivsgZ7lJoD89MJDmQ6a6ydnlCEyDHN2 bf7426aldVwY2O2SKBaRSfKPKRM= X-Google-Smtp-Source: APXvYqyzSKQxkMcsSg7EAntzsbBbQEj3xKhZcuqah7INX+5Koe8L4X/v6FWUTA5N00X2T/LRvJ7uTQ== X-Received: by 2002:a02:cc6c:: with SMTP id j12mr15419354jaq.29.1565706618360; Tue, 13 Aug 2019 07:30:18 -0700 (PDT) Received: from localhost.localdomain (c-68-40-189-247.hsd1.mi.comcast.net. [68.40.189.247]) by smtp.gmail.com with ESMTPSA id o6sm9429161ioh.22.2019.08.13.07.30.17 for (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 13 Aug 2019 07:30:17 -0700 (PDT) From: Trond Myklebust X-Google-Original-From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH 5/5] NFS: Ensure O_DIRECT reports an error if the bytes read/written is 0 Date: Tue, 13 Aug 2019 10:28:06 -0400 Message-Id: <20190813142806.123268-5-trond.myklebust@hammerspace.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190813142806.123268-4-trond.myklebust@hammerspace.com> References: <20190813142806.123268-1-trond.myklebust@hammerspace.com> <20190813142806.123268-2-trond.myklebust@hammerspace.com> <20190813142806.123268-3-trond.myklebust@hammerspace.com> <20190813142806.123268-4-trond.myklebust@hammerspace.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org If the attempt to resend the I/O results in no bytes being read/written, we must ensure that we report the error. Signed-off-by: Trond Myklebust Fixes: 0a00b77b331a ("nfs: mirroring support for direct io") Cc: stable@vger.kernel.org # v3.20+ --- fs/nfs/direct.c | 27 ++++++++++++++++++--------- fs/nfs/pagelist.c | 1 + 2 files changed, 19 insertions(+), 9 deletions(-) diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 0cb442406168..222d7115db71 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -401,15 +401,21 @@ static void nfs_direct_read_completion(struct nfs_pgio_header *hdr) unsigned long bytes = 0; struct nfs_direct_req *dreq = hdr->dreq; - if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) - goto out_put; - spin_lock(&dreq->lock); - if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes == 0)) + if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) dreq->error = hdr->error; - else + + if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) { + spin_unlock(&dreq->lock); + goto out_put; + } + + if (hdr->good_bytes != 0) nfs_direct_good_bytes(dreq, hdr); + if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) + dreq->error = 0; + spin_unlock(&dreq->lock); while (!list_empty(&hdr->pages)) { @@ -782,16 +788,19 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr) bool request_commit = false; struct nfs_page *req = nfs_list_entry(hdr->pages.next); - if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) - goto out_put; - nfs_init_cinfo_from_dreq(&cinfo, dreq); spin_lock(&dreq->lock); if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) dreq->error = hdr->error; - if (dreq->error == 0) { + + if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) { + spin_unlock(&dreq->lock); + goto out_put; + } + + if (hdr->good_bytes != 0) { nfs_direct_good_bytes(dreq, hdr); if (nfs_write_need_commit(hdr)) { if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES) diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 15c254753f88..56cefa0ab804 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -1266,6 +1266,7 @@ int nfs_pageio_resend(struct nfs_pageio_descriptor *desc, if (!list_empty(&pages)) { int err = desc->pg_error < 0 ? desc->pg_error : -EIO; hdr->completion_ops->error_cleanup(&pages, err); + nfs_set_pgio_error(hdr, err, hdr->io_start); return err; } return 0; -- 2.21.0