linux-kernel - Re: [PATCH v3 03/13] md/raid1,raid10: return actual write status in narrow_write

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Message-Id: <b4abf0b4-6df2-442e-8549-a409cd24e989@fnnas.com>
Date: Sat, 3 Jan 2026 18:16:32 +0800
From: "Yu Kuai" <yukuai@...as.com>
To: <linan666@...weicloud.com>, <song@...nel.org>, <neil@...wn.name>, 
	<namhyung@...il.com>
Cc: <linux-raid@...r.kernel.org>, <linux-kernel@...r.kernel.org>, 
	<k@...l.me>, <yangerkun@...wei.com>, <yi.zhang@...wei.com>, 
	<yukuai@...as.com>
Subject: Re: [PATCH v3 03/13] md/raid1,raid10: return actual write status in narrow_write_error

Hi,

在 2026/1/3 17:37, Yu Kuai 写道:
> Hi,
>
> 在 2025/12/15 11:04, linan666@...weicloud.com 写道:
>> From: Li Nan <linan122@...wei.com>
>>
>> narrow_write_error() currently returns true when setting badblocks fails.

I think you mean rewrite failed and set badblocks succeed.

>> Instead, return actual status of all retried writes, succeeding only when
>> all retried writes complete successfully. This gives upper layers accurate
>> information about write outcomes.
>>
>> When setting badblocks fails, mark the device as faulty and return at once.
>> No need to continue processing remaining sections in such cases.
>>
>> Signed-off-by: Li Nan <linan122@...wei.com>
>> ---
>>    drivers/md/raid1.c  | 17 +++++++++--------
>>    drivers/md/raid10.c | 15 +++++++++------
>>    2 files changed, 18 insertions(+), 14 deletions(-)
>>
>> diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
>> index 90ad9455f74a..9ffa3ab0fdcc 100644
>> --- a/drivers/md/raid1.c
>> +++ b/drivers/md/raid1.c
>> @@ -2541,11 +2541,15 @@ static bool narrow_write_error(struct r1bio *r1_bio, int i)
>>    		bio_trim(wbio, sector - r1_bio->sector, sectors);
>>    		wbio->bi_iter.bi_sector += rdev->data_offset;
>>    
>> -		if (submit_bio_wait(wbio) < 0)
>> +		if (submit_bio_wait(wbio)) {
>>    			/* failure! */
>> -			ok = rdev_set_badblocks(rdev, sector,
>> -						sectors, 0)
>> -				&& ok;
>> +			ok = false;
>> +			if (!rdev_set_badblocks(rdev, sector, sectors, 0)) {
>> +				md_error(mddev, rdev);
>> +				bio_put(wbio);
>> +				break;
>> +			}
>> +		}
>>    
>>    		bio_put(wbio);
>>    		sect_to_write -= sectors;
>> @@ -2596,10 +2600,7 @@ static void handle_write_finished(struct r1conf *conf, struct r1bio *r1_bio)
>>    			 * errors.
>>    			 */
>>    			fail = true;
>> -			if (!narrow_write_error(r1_bio, m))
>> -				md_error(conf->mddev,
>> -					 conf->mirrors[m].rdev);
>> -				/* an I/O failed, we can't clear the bitmap */
>> +			narrow_write_error(r1_bio, m);
> I remembered that I said please change this helper to void.

take a look back after patch 4, I still think this should be void.

>
>>    			rdev_dec_pending(conf->mirrors[m].rdev,
>>    					 conf->mddev);
>>    		}
>> diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
>> index 40c31c00dc60..21a347c4829b 100644
>> --- a/drivers/md/raid10.c
>> +++ b/drivers/md/raid10.c
>> @@ -2820,11 +2820,15 @@ static bool narrow_write_error(struct r10bio *r10_bio, int i)
>>    				   choose_data_offset(r10_bio, rdev);
>>    		wbio->bi_opf = REQ_OP_WRITE;
>>    
>> -		if (submit_bio_wait(wbio) < 0)
>> +		if (submit_bio_wait(wbio)) {
>>    			/* Failure! */
>> -			ok = rdev_set_badblocks(rdev, wsector,
>> -						sectors, 0)
>> -				&& ok;
>> +			ok = false;
>> +			if (!rdev_set_badblocks(rdev, wsector, sectors, 0)) {
>> +				md_error(mddev, rdev);
>> +				bio_put(wbio);
>> +				break;
>> +			}
>> +		}
>>    
>>    		bio_put(wbio);
>>    		sect_to_write -= sectors;
>> @@ -2936,8 +2940,7 @@ static void handle_write_completed(struct r10conf *conf, struct r10bio *r10_bio)
>>    				rdev_dec_pending(rdev, conf->mddev);
>>    			} else if (bio != NULL && bio->bi_status) {
>>    				fail = true;
>> -				if (!narrow_write_error(r10_bio, m))
>> -					md_error(conf->mddev, rdev);
>> +				narrow_write_error(r10_bio, m);
>>    				rdev_dec_pending(rdev, conf->mddev);
>>    			}
>>    			bio = r10_bio->devs[m].repl_bio;

-- 
Thansk,
Kuai