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Mon, 11 Nov 2024 11:22:16 +0000 Received: from DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::4f45:f4ab:121:e088]) by DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::4f45:f4ab:121:e088%5]) with mapi id 15.20.8137.027; Mon, 11 Nov 2024 11:22:16 +0000 From: John Garry To: axboe@kernel.dk, song@kernel.org, yukuai3@huawei.com, hch@lst.de Cc: martin.petersen@oracle.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, hare@suse.de, Johannes.Thumshirn@wdc.com, John Garry Subject: [PATCH v4 6/6] md/raid10: Handle bio_split() errors Date: Mon, 11 Nov 2024 11:21:50 +0000 Message-Id: <20241111112150.3756529-7-john.g.garry@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20241111112150.3756529-1-john.g.garry@oracle.com> References: <20241111112150.3756529-1-john.g.garry@oracle.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: MN0P220CA0002.NAMP220.PROD.OUTLOOK.COM (2603:10b6:208:52e::31) To DM6PR10MB4313.namprd10.prod.outlook.com (2603:10b6:5:212::20) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR10MB4313:EE_|CH0PR10MB5194:EE_ X-MS-Office365-Filtering-Correlation-Id: c48498f0-ef36-4ae2-16e2-08dd02431914 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014; 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charset="utf-8" Add proper bio_split() error handling. For any error, call raid_end_bio_io() and return. Except for discard, where we end the bio directly. Reviewed-by: Yu Kuai Reviewed-by: Hannes Reinecke Signed-off-by: John Garry --- drivers/md/raid10.c | 47 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index ff73db2f6c41..8c7f5daa073a 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1159,6 +1159,7 @@ static void raid10_read_request(struct mddev *mddev, = struct bio *bio, int slot =3D r10_bio->read_slot; struct md_rdev *err_rdev =3D NULL; gfp_t gfp =3D GFP_NOIO; + int error; =20 if (slot >=3D 0 && r10_bio->devs[slot].rdev) { /* @@ -1206,6 +1207,10 @@ static void raid10_read_request(struct mddev *mddev,= struct bio *bio, if (max_sectors < bio_sectors(bio)) { struct bio *split =3D bio_split(bio, max_sectors, gfp, &conf->bio_split); + if (IS_ERR(split)) { + error =3D PTR_ERR(split); + goto err_handle; + } bio_chain(split, bio); allow_barrier(conf); submit_bio_noacct(bio); @@ -1236,6 +1241,11 @@ static void raid10_read_request(struct mddev *mddev,= struct bio *bio, mddev_trace_remap(mddev, read_bio, r10_bio->sector); submit_bio_noacct(read_bio); return; +err_handle: + atomic_dec(&rdev->nr_pending); + bio->bi_status =3D errno_to_blk_status(error); + set_bit(R10BIO_Uptodate, &r10_bio->state); + raid_end_bio_io(r10_bio); } =20 static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_= bio, @@ -1343,9 +1353,10 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, struct r10bio *r10_bio) { struct r10conf *conf =3D mddev->private; - int i; + int i, k; sector_t sectors; int max_sectors; + int error; =20 if ((mddev_is_clustered(mddev) && md_cluster_ops->area_resyncing(mddev, WRITE, @@ -1478,6 +1489,10 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, if (r10_bio->sectors < bio_sectors(bio)) { struct bio *split =3D bio_split(bio, r10_bio->sectors, GFP_NOIO, &conf->bio_split); + if (IS_ERR(split)) { + error =3D PTR_ERR(split); + goto err_handle; + } bio_chain(split, bio); allow_barrier(conf); submit_bio_noacct(bio); @@ -1499,6 +1514,26 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, raid10_write_one_disk(mddev, r10_bio, bio, true, i); } one_write_done(r10_bio); + return; +err_handle: + for (k =3D 0; k < i; k++) { + int d =3D r10_bio->devs[k].devnum; + struct md_rdev *rdev =3D conf->mirrors[d].rdev; + struct md_rdev *rrdev =3D conf->mirrors[d].replacement; + + if (r10_bio->devs[k].bio) { + rdev_dec_pending(rdev, mddev); + r10_bio->devs[k].bio =3D NULL; + } + if (r10_bio->devs[k].repl_bio) { + rdev_dec_pending(rrdev, mddev); + r10_bio->devs[k].repl_bio =3D NULL; + } + } + + bio->bi_status =3D errno_to_blk_status(error); + set_bit(R10BIO_Uptodate, &r10_bio->state); + raid_end_bio_io(r10_bio); } =20 static void __make_request(struct mddev *mddev, struct bio *bio, int secto= rs) @@ -1640,6 +1675,11 @@ static int raid10_handle_discard(struct mddev *mddev= , struct bio *bio) if (remainder) { split_size =3D stripe_size - remainder; split =3D bio_split(bio, split_size, GFP_NOIO, &conf->bio_split); + if (IS_ERR(split)) { + bio->bi_status =3D errno_to_blk_status(PTR_ERR(split)); + bio_endio(bio); + return 0; + } bio_chain(split, bio); allow_barrier(conf); /* Resend the fist split part */ @@ -1650,6 +1690,11 @@ static int raid10_handle_discard(struct mddev *mddev= , struct bio *bio) if (remainder) { split_size =3D bio_sectors(bio) - remainder; split =3D bio_split(bio, split_size, GFP_NOIO, &conf->bio_split); + if (IS_ERR(split)) { + bio->bi_status =3D errno_to_blk_status(PTR_ERR(split)); + bio_endio(bio); + return 0; + } bio_chain(split, bio); allow_barrier(conf); /* Resend the second split part */ --=20 2.31.1