linux-kernel - Re: [PATCH v2 1/5] f2fs: blocks need to belong to the same segment when using update_sit

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Message-ID: <290e29df-3f63-4de9-a18f-c5c4190d85f1@kernel.org>
Date: Thu, 31 Oct 2024 15:19:15 +0800
From: Chao Yu <chao@...nel.org>
To: Yi Sun <yi.sun@...soc.com>, jaegeuk@...nel.org
Cc: Chao Yu <chao@...nel.org>, sunyibuaa@...il.com,
 linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
 niuzhiguo84@...il.com, hao_hao.wang@...soc.com, ke.wang@...soc.com
Subject: Re: [PATCH v2 1/5] f2fs: blocks need to belong to the same segment
 when using update_sit_entry()

On 2024/10/30 18:31, Yi Sun wrote:
> When using update_sit_entry() to release consecutive blocks,
> ensure that the consecutive blocks belong to the same segment.
> Because after update_sit_entry_for_realese(), @segno is still
> in use in update_sit_entry().

I think this patch should be merged into
"f2fs: introduce update_sit_entry_for_release()".

Thanks,

> 
> Signed-off-by: Yi Sun <yi.sun@...soc.com>
> ---
>   fs/f2fs/segment.c | 11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index bb2fd98331cd..a5bd101c63a1 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -2424,6 +2424,10 @@ static void update_segment_mtime(struct f2fs_sb_info *sbi, block_t blkaddr,
>   		SIT_I(sbi)->max_mtime = ctime;
>   }
>   
> +/*
> + * NOTE: when updating multiple blocks at the same time, please ensure
> + * that the consecutive input blocks belong to the same segment.
> + */
>   static int update_sit_entry_for_release(struct f2fs_sb_info *sbi, struct seg_entry *se,
>   				block_t blkaddr, unsigned int offset, int del)
>   {
> @@ -2434,6 +2438,8 @@ static int update_sit_entry_for_release(struct f2fs_sb_info *sbi, struct seg_ent
>   	int i;
>   	int del_count = -del;
>   
> +	f2fs_bug_on(sbi, GET_SEGNO(sbi, blkaddr) != GET_SEGNO(sbi, blkaddr + del_count - 1));
> +
>   	for (i = 0; i < del_count; i++) {
>   		exist = f2fs_test_and_clear_bit(offset + i, se->cur_valid_map);
>   #ifdef CONFIG_F2FS_CHECK_FS
> @@ -2476,6 +2482,11 @@ static int update_sit_entry_for_release(struct f2fs_sb_info *sbi, struct seg_ent
>   	return del;
>   }
>   
> +/*
> + * If releasing blocks, this function supports updating multiple consecutive blocks
> + * at one time, but please note that these consecutive blocks need to belong to the
> + * same segment.
> + */
>   static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
>   {
>   	struct seg_entry *se;