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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 59032C433E0 for ; Thu, 9 Jul 2020 15:09:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2AECD206C3 for ; Thu, 9 Jul 2020 15:09:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="haiovo+o" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726675AbgGIPJU (ORCPT ); Thu, 9 Jul 2020 11:09:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726615AbgGIPJU (ORCPT ); Thu, 9 Jul 2020 11:09:20 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A8DBC08C5CE for ; Thu, 9 Jul 2020 08:09:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc: Content-Type:Content-ID:Content-Description; bh=7o2UulIjTaQVseT8vnbo1iDMZH3sTe49MkopTXsYar8=; b=haiovo+oXDm1+xQWcwFQrxilvu 2cWVYBuCT/pE70mO7yLOORT8JacvBR/U362C+jROUT3yWaSlQt9e5t2bDD5w2oTqf6rxHtc1Emw0I xDadmK6lzlqLegmxAiasUTYUbePOpIxYAVO2NSzq3nrini59RBCG1HHqzOcK5vaWE12cEXqEFECfg ryXAGIpyXETghBjFy/ZafM298Jf96a9RiC7Qredr/jlYcjwGVKHWwLCpa98VeSjqOMh21lLwBNbSo ptAscEfoq8IOl1bdHtDiiGLP4uLIfy8da+qclFg0nGAsZX4wPXElPEJzTEGtvRHdkSegcBJbzLGcF EN0fLCsg==; Received: from 089144201169.atnat0010.highway.a1.net ([89.144.201.169] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jtYAn-0004vT-O7 for linux-xfs@vger.kernel.org; Thu, 09 Jul 2020 15:09:19 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Subject: [PATCH 01/13] xfs: refactor the buf ioend disposition code Date: Thu, 9 Jul 2020 17:04:41 +0200 Message-Id: <20200709150453.109230-2-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200709150453.109230-1-hch@lst.de> References: <20200709150453.109230-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Handle the no-error case in xfs_buf_iodone_error as well, and to clarify the code rename the function, use the actual enum type as return value and then switch on it in the callers. Signed-off-by: Christoph Hellwig --- fs/xfs/xfs_buf_item.c | 115 +++++++++++++++++++++++------------------- 1 file changed, 62 insertions(+), 53 deletions(-) diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index e9428c30862a98..19896884189973 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -1046,24 +1046,27 @@ xfs_buf_ioerror_permanent( * * Multi-state return value: * - * XBF_IOERROR_FINISH: clear IO error retry state and run callback completions - * XBF_IOERROR_DONE: resubmitted immediately, do not run any completions - * XBF_IOERROR_FAIL: transient error, run failure callback completions and then + * XBF_IOEND_FINISH: run callback completions + * XBF_IOEND_DONE: resubmitted immediately, do not run any completions + * XBF_IOEND_FAIL: transient error, run failure callback completions and then * release the buffer */ -enum { - XBF_IOERROR_FINISH, - XBF_IOERROR_DONE, - XBF_IOERROR_FAIL, +enum xfs_buf_ioend_disposition { + XBF_IOEND_FINISH, + XBF_IOEND_DONE, + XBF_IOEND_FAIL, }; -static int -xfs_buf_iodone_error( +static enum xfs_buf_ioend_disposition +xfs_buf_ioend_disposition( struct xfs_buf *bp) { struct xfs_mount *mp = bp->b_mount; struct xfs_error_cfg *cfg; + if (likely(!bp->b_error)) + return XBF_IOEND_FINISH; + if (xfs_buf_ioerror_fail_without_retry(bp)) goto out_stale; @@ -1073,7 +1076,7 @@ xfs_buf_iodone_error( if (xfs_buf_ioerror_retry(bp, cfg)) { xfs_buf_ioerror(bp, 0); xfs_buf_submit(bp); - return XBF_IOERROR_DONE; + return XBF_IOEND_DONE; } /* @@ -1086,13 +1089,13 @@ xfs_buf_iodone_error( } /* Still considered a transient error. Caller will schedule retries. */ - return XBF_IOERROR_FAIL; + return XBF_IOEND_FAIL; out_stale: xfs_buf_stale(bp); bp->b_flags |= XBF_DONE; trace_xfs_buf_error_relse(bp, _RET_IP_); - return XBF_IOERROR_FINISH; + return XBF_IOEND_FINISH; } static void @@ -1128,6 +1131,19 @@ xfs_buf_clear_ioerror_retry_state( bp->b_first_retry_time = 0; } +static void +xfs_buf_inode_io_fail( + struct xfs_buf *bp) +{ + struct xfs_log_item *lip; + + list_for_each_entry(lip, &bp->b_li_list, li_bio_list) + set_bit(XFS_LI_FAILED, &lip->li_flags); + + xfs_buf_ioerror(bp, 0); + xfs_buf_relse(bp); +} + /* * Inode buffer iodone callback function. */ @@ -1135,30 +1151,36 @@ void xfs_buf_inode_iodone( struct xfs_buf *bp) { - if (bp->b_error) { - struct xfs_log_item *lip; - int ret = xfs_buf_iodone_error(bp); - - if (ret == XBF_IOERROR_FINISH) - goto finish_iodone; - if (ret == XBF_IOERROR_DONE) - return; - ASSERT(ret == XBF_IOERROR_FAIL); - list_for_each_entry(lip, &bp->b_li_list, li_bio_list) { - set_bit(XFS_LI_FAILED, &lip->li_flags); - } - xfs_buf_ioerror(bp, 0); - xfs_buf_relse(bp); + switch (xfs_buf_ioend_disposition(bp)) { + case XBF_IOEND_DONE: + return; + case XBF_IOEND_FAIL: + xfs_buf_inode_io_fail(bp); return; + default: + break; } -finish_iodone: xfs_buf_clear_ioerror_retry_state(bp); xfs_buf_item_done(bp); xfs_iflush_done(bp); xfs_buf_ioend_finish(bp); } +static void +xfs_buf_dquot_io_fail( + struct xfs_buf *bp) +{ + struct xfs_log_item *lip; + + spin_lock(&bp->b_mount->m_ail->ail_lock); + list_for_each_entry(lip, &bp->b_li_list, li_bio_list) + xfs_set_li_failed(lip, bp); + spin_unlock(&bp->b_mount->m_ail->ail_lock); + xfs_buf_ioerror(bp, 0); + xfs_buf_relse(bp); +} + /* * Dquot buffer iodone callback function. */ @@ -1166,26 +1188,16 @@ void xfs_buf_dquot_iodone( struct xfs_buf *bp) { - if (bp->b_error) { - struct xfs_log_item *lip; - int ret = xfs_buf_iodone_error(bp); - - if (ret == XBF_IOERROR_FINISH) - goto finish_iodone; - if (ret == XBF_IOERROR_DONE) - return; - ASSERT(ret == XBF_IOERROR_FAIL); - spin_lock(&bp->b_mount->m_ail->ail_lock); - list_for_each_entry(lip, &bp->b_li_list, li_bio_list) { - xfs_set_li_failed(lip, bp); - } - spin_unlock(&bp->b_mount->m_ail->ail_lock); - xfs_buf_ioerror(bp, 0); - xfs_buf_relse(bp); + switch (xfs_buf_ioend_disposition(bp)) { + case XBF_IOEND_DONE: + return; + case XBF_IOEND_FAIL: + xfs_buf_dquot_io_fail(bp); return; + default: + break; } -finish_iodone: xfs_buf_clear_ioerror_retry_state(bp); /* a newly allocated dquot buffer might have a log item attached */ xfs_buf_item_done(bp); @@ -1203,21 +1215,18 @@ void xfs_buf_iodone( struct xfs_buf *bp) { - if (bp->b_error) { - int ret = xfs_buf_iodone_error(bp); - - if (ret == XBF_IOERROR_FINISH) - goto finish_iodone; - if (ret == XBF_IOERROR_DONE) - return; - ASSERT(ret == XBF_IOERROR_FAIL); + switch (xfs_buf_ioend_disposition(bp)) { + case XBF_IOEND_DONE: + return; + case XBF_IOEND_FAIL: ASSERT(list_empty(&bp->b_li_list)); xfs_buf_ioerror(bp, 0); xfs_buf_relse(bp); return; + default: + break; } -finish_iodone: xfs_buf_clear_ioerror_retry_state(bp); xfs_buf_item_done(bp); xfs_buf_ioend_finish(bp); -- 2.26.2