From patchwork Mon Jan 20 22:57:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 11342927 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2621F17EA for ; Mon, 20 Jan 2020 22:57:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF15624125 for ; Mon, 20 Jan 2020 22:57:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="o24g7yhH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726816AbgATW5J (ORCPT ); Mon, 20 Jan 2020 17:57:09 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:52162 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726607AbgATW5J (ORCPT ); Mon, 20 Jan 2020 17:57:09 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00KMtaBl054348; Mon, 20 Jan 2020 22:57:04 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : from : to : cc : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2019-08-05; bh=FgVYbh5UgxCv8zai45MYb/bEsXfxSqMjX6SHURWTRzM=; b=o24g7yhHLHgWl1kDeT3tPGqUPvEMx7oiskTOq2pu+m4Yz3d3063tqp6NswgHE7jltp3T GI8us3rPR3cm6Oofw0bvM5NO8KMaq8jhuLJguerpTkg6hHCfNfoWj+hFUSTx4cfeRDwo tOgEZMKU3zyUTUePcWCDuQQLEf0Rs2zR8aQJmGi332ns3pm2LtiQ9mCOsYfb0oeG8scp ywGZChTSdSiG0i2XOtFjXLrvHeVUWLEXT8E4D1WHwHU5dn7YbnPhpkL6VzcaE6jeuNm3 sUarUg5+Bdeou390Iub4B5OmALfMqJ3VTRgeDs13tSs04dtWRdi73enX4eU6yZ/GpsH6 JQ== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2120.oracle.com with ESMTP id 2xktnr1jpw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Jan 2020 22:57:04 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00KMn49D037099; Mon, 20 Jan 2020 22:57:03 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userp3020.oracle.com with ESMTP id 2xmc5mc550-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Jan 2020 22:57:03 +0000 Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 00KMv2iK012258; Mon, 20 Jan 2020 22:57:03 GMT Received: from localhost (/67.169.218.210) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 20 Jan 2020 14:57:02 -0800 Subject: [PATCH 05/13] xfs: make xfs_buf_read_map return an error code From: "Darrick J. Wong" To: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, hch@infradead.org, david@fromorbit.com Date: Mon, 20 Jan 2020 14:57:01 -0800 Message-ID: <157956102137.1166689.2159908930036102057.stgit@magnolia> In-Reply-To: <157956098906.1166689.13651975861399490259.stgit@magnolia> References: <157956098906.1166689.13651975861399490259.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9506 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001200192 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9506 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001200192 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Darrick J. Wong Convert xfs_buf_read_map() to return numeric error codes like most everywhere else in xfs. Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_alloc.c | 7 +++---- fs/xfs/xfs_buf.c | 18 ++++++++++++------ fs/xfs/xfs_buf.h | 21 ++++++--------------- fs/xfs/xfs_trans_buf.c | 9 +++------ 4 files changed, 24 insertions(+), 31 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index fc93fd88ec89..df25024275a1 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2956,14 +2956,13 @@ xfs_read_agf( trace_xfs_read_agf(mp, agno); ASSERT(agno != NULLAGNUMBER); - error = xfs_trans_read_buf( - mp, tp, mp->m_ddev_targp, + error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), XFS_FSS_TO_BB(mp, 1), flags, bpp, &xfs_agf_buf_ops); + if (error == -EAGAIN) + return 0; if (error) return error; - if (!*bpp) - return 0; ASSERT(!(*bpp)->b_error); xfs_buf_set_ref(*bpp, XFS_AGF_REF); diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 09b8f00d4182..460821844ee5 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -809,21 +809,23 @@ xfs_buf_reverify( return bp->b_error; } -xfs_buf_t * +int xfs_buf_read_map( struct xfs_buftarg *target, struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, + struct xfs_buf **bpp, const struct xfs_buf_ops *ops) { struct xfs_buf *bp; flags |= XBF_READ; + *bpp = NULL; bp = xfs_buf_get_map(target, map, nmaps, flags); if (!bp) - return NULL; + return -ENOMEM; trace_xfs_buf_read(bp, flags, _RET_IP_); @@ -831,7 +833,8 @@ xfs_buf_read_map( XFS_STATS_INC(target->bt_mount, xb_get_read); bp->b_ops = ops; _xfs_buf_read(bp, flags); - return bp; + *bpp = bp; + return 0; } xfs_buf_reverify(bp, ops); @@ -842,13 +845,14 @@ xfs_buf_read_map( * drop the buffer */ xfs_buf_relse(bp); - return NULL; + return 0; } /* We do not want read in the flags */ bp->b_flags &= ~XBF_READ; ASSERT(bp->b_ops != NULL || ops == NULL); - return bp; + *bpp = bp; + return 0; } /* @@ -862,11 +866,13 @@ xfs_buf_readahead_map( int nmaps, const struct xfs_buf_ops *ops) { + struct xfs_buf *bp; + if (bdi_read_congested(target->bt_bdev->bd_bdi)) return; xfs_buf_read_map(target, map, nmaps, - XBF_TRYLOCK|XBF_ASYNC|XBF_READ_AHEAD, ops); + XBF_TRYLOCK | XBF_ASYNC | XBF_READ_AHEAD, &bp, ops); } /* diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index eace3e285157..14209db07684 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -195,13 +195,11 @@ struct xfs_buf *xfs_buf_incore(struct xfs_buftarg *target, struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target, struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags); -struct xfs_buf *xfs_buf_read_map(struct xfs_buftarg *target, - struct xfs_buf_map *map, int nmaps, - xfs_buf_flags_t flags, - const struct xfs_buf_ops *ops); -void xfs_buf_readahead_map(struct xfs_buftarg *target, - struct xfs_buf_map *map, int nmaps, - const struct xfs_buf_ops *ops); +int xfs_buf_read_map(struct xfs_buftarg *target, struct xfs_buf_map *map, + int nmaps, xfs_buf_flags_t flags, struct xfs_buf **bpp, + const struct xfs_buf_ops *ops); +void xfs_buf_readahead_map(struct xfs_buftarg *target, struct xfs_buf_map *map, + int nmaps, const struct xfs_buf_ops *ops); static inline int xfs_buf_get( @@ -231,16 +229,9 @@ xfs_buf_read( struct xfs_buf **bpp, const struct xfs_buf_ops *ops) { - struct xfs_buf *bp; DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); - *bpp = NULL; - bp = xfs_buf_read_map(target, &map, 1, flags, ops); - if (!bp) - return -ENOMEM; - - *bpp = bp; - return 0; + return xfs_buf_read_map(target, &map, 1, flags, bpp, ops); } static inline void diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c index b5b3a78ef31c..a2af6dec310d 100644 --- a/fs/xfs/xfs_trans_buf.c +++ b/fs/xfs/xfs_trans_buf.c @@ -298,12 +298,9 @@ xfs_trans_read_buf_map( return 0; } - bp = xfs_buf_read_map(target, map, nmaps, flags, ops); - if (!bp) { - if (!(flags & XBF_TRYLOCK)) - return -ENOMEM; - return tp ? 0 : -EAGAIN; - } + error = xfs_buf_read_map(target, map, nmaps, flags, &bp, ops); + if (error) + return error; /* * If we've had a read error, then the contents of the buffer are