linux-kernel - Re: [PATCH v2 1/2] md: add helper rdev_needs

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Message-ID: <258db10c-f80f-5975-d879-ec0d16f1db6e@huaweicloud.com>
Date: Thu, 14 Aug 2025 08:52:57 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Zheng Qixing <zhengqixing@...weicloud.com>, song@...nel.org,
 linan122@...wei.com
Cc: linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
 yi.zhang@...wei.com, yangerkun@...wei.com, houtao1@...wei.com,
 zhengqixing@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH v2 1/2] md: add helper rdev_needs_recovery()

Hi,

在 2025/08/12 10:17, Zheng Qixing 写道:
> From: Zheng Qixing <zhengqixing@...wei.com>
> 
> Add a helper for checking if an rdev needs recovery.
> 
> Signed-off-by: Zheng Qixing <zhengqixing@...wei.com>
> ---
>   drivers/md/md.c | 20 ++++++++++++--------
>   1 file changed, 12 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index ac85ec73a409..4ea956a80343 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -4835,6 +4835,16 @@ metadata_store(struct mddev *mddev, const char *buf, size_t len)
>   static struct md_sysfs_entry md_metadata =
>   __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store);
>   
> +static bool rdev_needs_recovery(struct md_rdev *rdev, sector_t sectors)
> +{
> +	if (!test_bit(Journal, &rdev->flags) &&
> +	    !test_bit(Faulty, &rdev->flags) &&
> +	    !test_bit(In_sync, &rdev->flags) &&
> +	    rdev->recovery_offset < sectors)
> +		return true;
> +	return false;
return directly:

return !test_bit(Journal, &rdev->flags) &&
	!test_bit(Faulty, &rdev->flags) &&
	!test_bit(In_sync, &rdev->flags) &&
	rdev->recovery_offset < sectors);

Otherwise, feel free to add
Reviewed-by: Yu Kuai <yukuai3@...wei.com>

Kuai

> +}
> +
>   enum sync_action md_sync_action(struct mddev *mddev)
>   {
>   	unsigned long recovery = mddev->recovery;
> @@ -8969,10 +8979,7 @@ static sector_t md_sync_position(struct mddev *mddev, enum sync_action action)
>   		rcu_read_lock();
>   		rdev_for_each_rcu(rdev, mddev)
>   			if (rdev->raid_disk >= 0 &&
> -			    !test_bit(Journal, &rdev->flags) &&
> -			    !test_bit(Faulty, &rdev->flags) &&
> -			    !test_bit(In_sync, &rdev->flags) &&
> -			    rdev->recovery_offset < start)
> +			    rdev_needs_recovery(rdev, start))
>   				start = rdev->recovery_offset;
>   		rcu_read_unlock();
>   
> @@ -9333,10 +9340,7 @@ void md_do_sync(struct md_thread *thread)
>   				rdev_for_each_rcu(rdev, mddev)
>   					if (rdev->raid_disk >= 0 &&
>   					    mddev->delta_disks >= 0 &&
> -					    !test_bit(Journal, &rdev->flags) &&
> -					    !test_bit(Faulty, &rdev->flags) &&
> -					    !test_bit(In_sync, &rdev->flags) &&
> -					    rdev->recovery_offset < mddev->curr_resync)
> +					    rdev_needs_recovery(rdev, mddev->curr_resync))
>   						rdev->recovery_offset = mddev->curr_resync;
>   				rcu_read_unlock();
>   			}
>