linux-kernel - Re: [PATCH] f2fs: introduce sanity_check

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Message-ID: <Y8iotYUXzfPZLhj9@google.com>
Date:   Wed, 18 Jan 2023 18:19:33 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Yangtao Li <frank.li@...o.com>
Cc:     chao@...nel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] f2fs: introduce sanity_check_blocks()

On 01/12, Yangtao Li wrote:
> There are very similar codes in release_compress_blocks() and
> reserve_compress_blocks() which is used for data blocks check.
> 
> This patch introduces a new helper sanity_check_blocks()
> to include those common codes, and used it instead for cleanup.
> 
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>  fs/f2fs/file.c | 36 ++++++++++++++++++++----------------
>  1 file changed, 20 insertions(+), 16 deletions(-)
> 
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index f5c1b7814954..0d539155379c 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -3369,11 +3369,9 @@ static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
>  	return put_user(blocks, (u64 __user *)arg);
>  }
>  
> -static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
> +static int sanity_check_blocks(struct dnode_of_data *dn, pgoff_t count)
>  {
>  	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
> -	unsigned int released_blocks = 0;
> -	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
>  	block_t blkaddr;
>  	int i;
>  
> @@ -3390,6 +3388,21 @@ static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
>  		}
>  	}
>  
> +	return 0;
> +}
> +
> +static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
> +{
> +	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
> +	unsigned int released_blocks = 0;
> +	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
> +	block_t blkaddr;
> +	int i, rc;
> +
> +	rc = sanity_check_blocks(dn, count);

        ^
        err

> +	if (rc)
> +		return rc;
> +
>  	while (count) {
>  		int compr_blocks = 0;
>  
> @@ -3539,20 +3552,11 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
>  	unsigned int reserved_blocks = 0;
>  	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
>  	block_t blkaddr;
> -	int i;
> +	int i, rc;
>  
> -	for (i = 0; i < count; i++) {
> -		blkaddr = data_blkaddr(dn->inode, dn->node_page,
> -						dn->ofs_in_node + i);
> -
> -		if (!__is_valid_data_blkaddr(blkaddr))
> -			continue;
> -		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
> -					DATA_GENERIC_ENHANCE))) {
> -			f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
> -			return -EFSCORRUPTED;
> -		}
> -	}
> +	rc = sanity_check_blocks(dn, count);
> +	if (rc)
> +		return rc;
>  
>  	while (count) {
>  		int compr_blocks = 0;
> -- 
> 2.25.1