linux-kernel - Re: [PATCH 1/6] erofs: get rid of erofs_inode

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Date:   Tue, 7 Feb 2023 16:27:16 +0800
From:   Jingbo Xu <jefflexu@...ux.alibaba.com>
To:     Gao Xiang <hsiangkao@...ux.alibaba.com>,
        linux-erofs@...ts.ozlabs.org, Chao Yu <chao@...nel.org>,
        Yue Hu <huyue2@...lpad.com>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] erofs: get rid of erofs_inode_datablocks()



On 2/4/23 5:30 PM, Gao Xiang wrote:
> erofs_inode_datablocks() has the only one caller, let's just get
> rid of it entirely.  No logic changes.
> 
> Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>

Reviewed-by: Jingbo Xu <jefflexu@...ux.alibaba.com>


> ---
>  fs/erofs/internal.h |  6 ------
>  fs/erofs/namei.c    | 18 +++++-------------
>  2 files changed, 5 insertions(+), 19 deletions(-)
> 
> diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
> index 08ba817d6551..c18af21ba9c4 100644
> --- a/fs/erofs/internal.h
> +++ b/fs/erofs/internal.h
> @@ -344,12 +344,6 @@ static inline erofs_off_t erofs_iloc(struct inode *inode)
>  		(EROFS_I(inode)->nid << sbi->islotbits);
>  }
>  
> -static inline unsigned long erofs_inode_datablocks(struct inode *inode)
> -{
> -	/* since i_size cannot be changed */
> -	return DIV_ROUND_UP(inode->i_size, EROFS_BLKSIZ);
> -}
> -
>  static inline unsigned int erofs_bitrange(unsigned int value, unsigned int bit,
>  					  unsigned int bits)
>  {
> diff --git a/fs/erofs/namei.c b/fs/erofs/namei.c
> index b64a108fac92..966eabc61c13 100644
> --- a/fs/erofs/namei.c
> +++ b/fs/erofs/namei.c
> @@ -5,7 +5,6 @@
>   * Copyright (C) 2022, Alibaba Cloud
>   */
>  #include "xattr.h"
> -
>  #include <trace/events/erofs.h>
>  
>  struct erofs_qstr {
> @@ -87,19 +86,13 @@ static struct erofs_dirent *find_target_dirent(struct erofs_qstr *name,
>  	return ERR_PTR(-ENOENT);
>  }
>  
> -static void *find_target_block_classic(struct erofs_buf *target,
> -				       struct inode *dir,
> -				       struct erofs_qstr *name,
> -				       int *_ndirents)
> +static void *erofs_find_target_block(struct erofs_buf *target,
> +		struct inode *dir, struct erofs_qstr *name, int *_ndirents)
>  {
> -	unsigned int startprfx, endprfx;
> -	int head, back;
> +	int head = 0, back = DIV_ROUND_UP(dir->i_size, EROFS_BLKSIZ) - 1;
> +	unsigned int startprfx = 0, endprfx = 0;
>  	void *candidate = ERR_PTR(-ENOENT);
>  
> -	startprfx = endprfx = 0;
> -	head = 0;
> -	back = erofs_inode_datablocks(dir) - 1;
> -
>  	while (head <= back) {
>  		const int mid = head + (back - head) / 2;
>  		struct erofs_buf buf = __EROFS_BUF_INITIALIZER;
> @@ -180,8 +173,7 @@ int erofs_namei(struct inode *dir, const struct qstr *name, erofs_nid_t *nid,
>  	qn.end = name->name + name->len;
>  
>  	ndirents = 0;
> -
> -	de = find_target_block_classic(&buf, dir, &qn, &ndirents);
> +	de = erofs_find_target_block(&buf, dir, &qn, &ndirents);
>  	if (IS_ERR(de))
>  		return PTR_ERR(de);
>  

-- 
Thanks,
Jingbo