linux-kernel - Re: [f2fs-dev] [PATCH v7] f2fs: unify the error handling of f2fs_is_valid

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Date: Tue, 20 Feb 2024 13:34:32 +0800
From: Zhiguo Niu <niuzhiguo84@...il.com>
To: Chao Yu <chao@...nel.org>
Cc: Jaegeuk Kim <jaegeuk@...nel.org>, ke.wang@...soc.com, linux-kernel@...r.kernel.org, 
	linux-f2fs-devel@...ts.sourceforge.net, hongyu.jin@...soc.com, 
	Zhiguo Niu <zhiguo.niu@...soc.com>
Subject: Re: [f2fs-dev] [PATCH v7] f2fs: unify the error handling of f2fs_is_valid_blkaddr

On Tue, Feb 20, 2024 at 10:36 AM Chao Yu <chao@...nel.org> wrote:
>
> On 2024/2/19 22:36, Chao Yu wrote:
> >>>> Please think about how to optimize this, which is really ugly now
> ---
>   fs/f2fs/checkpoint.c | 12 ++++++++----
>   1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index 87b7c988c8ca..089c26b80be3 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -135,7 +135,7 @@ struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
>   }
>
>   static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
> -                                                       int type)
> +                                               int type, bool *record_error)
>   {
>         struct seg_entry *se;
>         unsigned int segno, offset;
> @@ -160,6 +160,7 @@ static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
>                          blkaddr, exist);
>                 set_sbi_flag(sbi, SBI_NEED_FSCK);
>                 dump_stack();
> +               *record_error = true;
>         }
>
>         return exist;
> @@ -209,10 +210,13 @@ static bool __f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
>                         dump_stack();
>                         goto err;
>                 } else {
> -                       valid = __is_bitmap_valid(sbi, blkaddr, type);
> -                       if ((!valid && type != DATA_GENERIC_ENHANCE_UPDATE) ||
> -                               (valid && type == DATA_GENERIC_ENHANCE_UPDATE))
> +                       bool record_error = false;
> +
> +                       valid = __is_bitmap_valid(sbi, blkaddr, type,
> +                                                       &record_error);
> +                       if (!valid || record_error)
if   type == DATA_GENERIC_ENHANCE_UPDATE && bitmap check invalid,  it
is a OK case, but !valid
will goto do error handling.
I think do f2fs_handle_error in __is_bitmap_valid is a good way.

>                                 goto err;
> +                       return valid;
>                 }
>                 break;
>         case META_GENERIC:
> --
> 2.40.1
>