linux-kernel - Re: [f2fs-dev] [PATCH 2/5] f2fs: fix write pointers all the time

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Message-ID: <68e95cb8-9bf5-4849-befc-bbbe8becfd68@kernel.org>
Date: Mon, 26 Feb 2024 10:48:01 +0800
From: Chao Yu <chao@...nel.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>, linux-kernel@...r.kernel.org,
 linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 2/5] f2fs: fix write pointers all the time

On 2024/2/24 4:55, Jaegeuk Kim wrote:
> Even if the roll forward recovery stopped due to any error, we have to fix
> the write pointers in order to mount the disk from the previous checkpoint.

Jaegeuk,

IIUC, we may lost warm node chain once we allocate new section for all logs,
should we give some notification in log to indicate such condition that
filesystem doesn't process a full recovery flow?

Thanks,

> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>   fs/f2fs/recovery.c | 2 +-
>   fs/f2fs/super.c    | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index b3baec666afe..8bbecb5f9323 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -913,7 +913,7 @@ int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
>   	 * and the f2fs is not read only, check and fix zoned block devices'
>   	 * write pointer consistency.
>   	 */
> -	if (!err && fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) &&
> +	if (fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) &&
>   			f2fs_sb_has_blkzoned(sbi)) {
>   		err = f2fs_fix_curseg_write_pointer(sbi);
>   		if (!err)
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 2e41142d07c0..4d03ce1109ad 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -4673,7 +4673,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
>   	 * If the f2fs is not readonly and fsync data recovery succeeds,
>   	 * check zoned block devices' write pointer consistency.
>   	 */
> -	if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
> +	if (!f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
>   		err = f2fs_check_write_pointer(sbi);
>   		if (err)
>   			goto free_meta;