linux-kernel - Re: [PATCH v3 07/12] ext4: drop ext4_es_delayed

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Message-ID: <20240904102503.nrghco2rouzu7bsr@quack3>
Date: Wed, 4 Sep 2024 12:25:03 +0200
From: Jan Kara <jack@...e.cz>
To: Zhang Yi <yi.zhang@...weicloud.com>
Cc: linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, tytso@....edu,
	adilger.kernel@...ger.ca, jack@...e.cz, ritesh.list@...il.com,
	yi.zhang@...wei.com, chengzhihao1@...wei.com, yukuai3@...wei.com
Subject: Re: [PATCH v3 07/12] ext4: drop ext4_es_delayed_clu()

On Tue 13-08-24 20:34:47, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@...wei.com>
> 
> Since we move ext4_da_update_reserve_space() to ext4_es_insert_extent(),
> no one uses ext4_es_delayed_clu() and __es_delayed_clu(), just drop
> them.
> 
> Signed-off-by: Zhang Yi <yi.zhang@...wei.com>

Always nice to see code removed :) Feel free to add:

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

									Honza

> ---
>  fs/ext4/extents_status.c | 88 ----------------------------------------
>  fs/ext4/extents_status.h |  2 -
>  2 files changed, 90 deletions(-)
> 
> diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
> index 41adf0d69959..b372b98af366 100644
> --- a/fs/ext4/extents_status.c
> +++ b/fs/ext4/extents_status.c
> @@ -2178,94 +2178,6 @@ void ext4_es_insert_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
>  	return;
>  }
>  
> -/*
> - * __es_delayed_clu - count number of clusters containing blocks that
> - *                    are delayed only
> - *
> - * @inode - file containing block range
> - * @start - logical block defining start of range
> - * @end - logical block defining end of range
> - *
> - * Returns the number of clusters containing only delayed (not delayed
> - * and unwritten) blocks in the range specified by @start and @end.  Any
> - * cluster or part of a cluster within the range and containing a delayed
> - * and not unwritten block within the range is counted as a whole cluster.
> - */
> -static unsigned int __es_delayed_clu(struct inode *inode, ext4_lblk_t start,
> -				     ext4_lblk_t end)
> -{
> -	struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
> -	struct extent_status *es;
> -	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
> -	struct rb_node *node;
> -	ext4_lblk_t first_lclu, last_lclu;
> -	unsigned long long last_counted_lclu;
> -	unsigned int n = 0;
> -
> -	/* guaranteed to be unequal to any ext4_lblk_t value */
> -	last_counted_lclu = ~0ULL;
> -
> -	es = __es_tree_search(&tree->root, start);
> -
> -	while (es && (es->es_lblk <= end)) {
> -		if (ext4_es_is_delonly(es)) {
> -			if (es->es_lblk <= start)
> -				first_lclu = EXT4_B2C(sbi, start);
> -			else
> -				first_lclu = EXT4_B2C(sbi, es->es_lblk);
> -
> -			if (ext4_es_end(es) >= end)
> -				last_lclu = EXT4_B2C(sbi, end);
> -			else
> -				last_lclu = EXT4_B2C(sbi, ext4_es_end(es));
> -
> -			if (first_lclu == last_counted_lclu)
> -				n += last_lclu - first_lclu;
> -			else
> -				n += last_lclu - first_lclu + 1;
> -			last_counted_lclu = last_lclu;
> -		}
> -		node = rb_next(&es->rb_node);
> -		if (!node)
> -			break;
> -		es = rb_entry(node, struct extent_status, rb_node);
> -	}
> -
> -	return n;
> -}
> -
> -/*
> - * ext4_es_delayed_clu - count number of clusters containing blocks that
> - *                       are both delayed and unwritten
> - *
> - * @inode - file containing block range
> - * @lblk - logical block defining start of range
> - * @len - number of blocks in range
> - *
> - * Locking for external use of __es_delayed_clu().
> - */
> -unsigned int ext4_es_delayed_clu(struct inode *inode, ext4_lblk_t lblk,
> -				 ext4_lblk_t len)
> -{
> -	struct ext4_inode_info *ei = EXT4_I(inode);
> -	ext4_lblk_t end;
> -	unsigned int n;
> -
> -	if (len == 0)
> -		return 0;
> -
> -	end = lblk + len - 1;
> -	WARN_ON(end < lblk);
> -
> -	read_lock(&ei->i_es_lock);
> -
> -	n = __es_delayed_clu(inode, lblk, end);
> -
> -	read_unlock(&ei->i_es_lock);
> -
> -	return n;
> -}
> -
>  /*
>   * __revise_pending - makes, cancels, or leaves unchanged pending cluster
>   *                    reservations for a specified block range depending
> diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
> index b74d693c1adb..47b3b55a852c 100644
> --- a/fs/ext4/extents_status.h
> +++ b/fs/ext4/extents_status.h
> @@ -252,8 +252,6 @@ extern bool ext4_is_pending(struct inode *inode, ext4_lblk_t lblk);
>  extern void ext4_es_insert_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
>  					  ext4_lblk_t len, bool lclu_allocated,
>  					  bool end_allocated);
> -extern unsigned int ext4_es_delayed_clu(struct inode *inode, ext4_lblk_t lblk,
> -					ext4_lblk_t len);
>  extern void ext4_clear_inode_es(struct inode *inode);
>  
>  #endif /* _EXT4_EXTENTS_STATUS_H */
> -- 
> 2.39.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR