linux-kernel - Re: [f2fs-dev] [PATCH] f2fs-tools: initialize allocated node area

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Message-ID: <b16ea8fb-b3f2-4ae9-c543-cd84e0f3fa48@kernel.org>
Date:   Mon, 16 Oct 2023 14:33:08 +0800
From:   Chao Yu <chao@...nel.org>
To:     Daeho Jeong <daeho43@...il.com>, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc:     Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH] f2fs-tools: initialize allocated node area

On 2023/10/14 6:24, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@...gle.com>
> 
> Need to initialize allocated node areas after memory allocation.
> 
> Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
> ---
>   fsck/node.c       | 1 +
>   include/f2fs_fs.h | 2 ++
>   2 files changed, 3 insertions(+)
> 
> diff --git a/fsck/node.c b/fsck/node.c
> index 3761470..6508340 100644
> --- a/fsck/node.c
> +++ b/fsck/node.c
> @@ -127,6 +127,7 @@ block_t new_node_block(struct f2fs_sb_info *sbi,
>   
>   	node_blk = calloc(BLOCK_SZ, 1);

calloc() has already initialized memory w/ zero, it doesn't need to reinitialize
it again?

>   	ASSERT(node_blk);
> +	memset(node_blk, 0, BLOCK_SZ);
>   
>   	F2FS_NODE_FOOTER(node_blk)->nid = cpu_to_le32(dn->nid);
>   	F2FS_NODE_FOOTER(node_blk)->ino = F2FS_NODE_FOOTER(f2fs_inode)->ino;
> diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
> index 3c7451c..7e22278 100644
> --- a/include/f2fs_fs.h
> +++ b/include/f2fs_fs.h
> @@ -1826,6 +1826,8 @@ static inline void show_version(const char *prog)
>   static inline void f2fs_init_inode(struct f2fs_super_block *sb,
>   		struct f2fs_node *raw_node, nid_t ino, time_t mtime, mode_t mode)
>   {
> +	memset(raw_node, 0, F2FS_BLKSIZE);

Ditto,

Thanks,

> +
>   	F2FS_NODE_FOOTER(raw_node)->nid = cpu_to_le32(ino);
>   	F2FS_NODE_FOOTER(raw_node)->ino = cpu_to_le32(ino);
>   	F2FS_NODE_FOOTER(raw_node)->cp_ver = cpu_to_le64(1);