linux-kernel - Re: [PATCH RFC v3 for-6.8/block 13/17] jbd2: use bdev apis

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Date: Thu, 4 Jan 2024 13:11:50 +0100
From: Jan Kara <jack@...e.cz>
To: Yu Kuai <yukuai1@...weicloud.com>
Cc: axboe@...nel.dk, roger.pau@...rix.com, colyli@...e.de,
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Subject: Re: [PATCH RFC v3 for-6.8/block 13/17] jbd2: use bdev apis

On Thu 21-12-23 16:58:46, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@...wei.com>
> 
> Avoid to access bd_inode directly, prepare to remove bd_inode from
> block_device.
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>

Looks good to me. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

But note there are changes pending to this code for the coming merge window
so you'll have to rebase...

								Honza

> ---
>  fs/jbd2/journal.c  | 3 +--
>  fs/jbd2/recovery.c | 6 ++----
>  2 files changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> index ed53188472f9..f1b5ffeaf02a 100644
> --- a/fs/jbd2/journal.c
> +++ b/fs/jbd2/journal.c
> @@ -2003,8 +2003,7 @@ static int __jbd2_journal_erase(journal_t *journal, unsigned int flags)
>  		byte_count = (block_stop - block_start + 1) *
>  				journal->j_blocksize;
>  
> -		truncate_inode_pages_range(journal->j_dev->bd_inode->i_mapping,
> -				byte_start, byte_stop);
> +		truncate_bdev_range(journal->j_dev, 0, byte_start, byte_stop);
>  
>  		if (flags & JBD2_JOURNAL_FLUSH_DISCARD) {
>  			err = blkdev_issue_discard(journal->j_dev,
> diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
> index 01f744cb97a4..6b6a2c4585fa 100644
> --- a/fs/jbd2/recovery.c
> +++ b/fs/jbd2/recovery.c
> @@ -290,7 +290,6 @@ int jbd2_journal_recover(journal_t *journal)
>  
>  	struct recovery_info	info;
>  	errseq_t		wb_err;
> -	struct address_space	*mapping;
>  
>  	memset(&info, 0, sizeof(info));
>  	sb = journal->j_superblock;
> @@ -309,8 +308,7 @@ int jbd2_journal_recover(journal_t *journal)
>  	}
>  
>  	wb_err = 0;
> -	mapping = journal->j_fs_dev->bd_inode->i_mapping;
> -	errseq_check_and_advance(&mapping->wb_err, &wb_err);
> +	bdev_wb_err_check_and_advance(journal->j_fs_dev, &wb_err);
>  	err = do_one_pass(journal, &info, PASS_SCAN);
>  	if (!err)
>  		err = do_one_pass(journal, &info, PASS_REVOKE);
> @@ -334,7 +332,7 @@ int jbd2_journal_recover(journal_t *journal)
>  	err2 = sync_blockdev(journal->j_fs_dev);
>  	if (!err)
>  		err = err2;
> -	err2 = errseq_check_and_advance(&mapping->wb_err, &wb_err);
> +	err2 = bdev_wb_err_check_and_advance(journal->j_fs_dev, &wb_err);
>  	if (!err)
>  		err = err2;
>  	/* Make sure all replayed data is on permanent storage */
> -- 
> 2.39.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR