linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: fix to do sanity check on nat entry of quota inode

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Message-ID: <CAHJ8P3+p7i4aPCnE=zjCRx4rq8d0sbSX0Hzxsi4c5pwnZ6mGCQ@mail.gmail.com>
Date: Fri, 19 Dec 2025 11:05:01 +0800
From: Zhiguo Niu <niuzhiguo84@...il.com>
To: Chao Yu <chao@...nel.org>
Cc: jaegeuk@...nel.org, Zhiguo Niu <zhiguo.niu@...soc.com>, linux-kernel@...r.kernel.org, 
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix to do sanity check on nat entry of
 quota inode

Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@...ts.sourceforge.net>
于2025年12月19日周五 10:56写道：
>
> As Zhiguo reported, nat entry of quota inode could be corrupted:
>
> "ino/block_addr=NULL_ADDR in nid=4 entry"
>
> We'd better to do sanity check on quota inode to detect and record
> nat.blk_addr inconsistency, so that we can have a chance to repair
> it w/ later fsck.
>
> Reported-by: Zhiguo Niu <zhiguo.niu@...soc.com>
> Signed-off-by: Chao Yu <chao@...nel.org>

Reviewed-by: Zhiguo Niu <zhiguo.niu@...soc.com>
Thanks!
> ---
>  fs/f2fs/f2fs.h  |  6 +++---
>  fs/f2fs/inode.c |  2 +-
>  fs/f2fs/node.c  | 11 +++++++++++
>  3 files changed, 15 insertions(+), 4 deletions(-)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 65ca1a5eaa88..c458df92bb0d 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -4928,16 +4928,16 @@ static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
>         return false;
>  }
>
> -static inline bool f2fs_quota_file(struct inode *inode)
> +static inline bool f2fs_quota_file(struct f2fs_sb_info *sbi, nid_t ino)
>  {
>  #ifdef CONFIG_QUOTA
>         int i;
>
> -       if (!f2fs_sb_has_quota_ino(F2FS_I_SB(inode)))
> +       if (!f2fs_sb_has_quota_ino(sbi))
>                 return false;
>
>         for (i = 0; i < MAXQUOTAS; i++) {
> -               if (f2fs_qf_ino(F2FS_I_SB(inode)->sb, i) == inode->i_ino)
> +               if (f2fs_qf_ino(sbi->sb, i) == ino)
>                         return true;
>         }
>  #endif
> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
> index 921fb02c0f49..d1270b25ad7d 100644
> --- a/fs/f2fs/inode.c
> +++ b/fs/f2fs/inode.c
> @@ -621,7 +621,7 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
>                 inode->i_fop = &f2fs_file_operations;
>                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
>                 if (IS_IMMUTABLE(inode) && !f2fs_compressed_file(inode) &&
> -                   !f2fs_quota_file(inode))
> +                   !f2fs_quota_file(sbi, inode->i_ino))
>                         mapping_set_folio_min_order(inode->i_mapping, 0);
>         } else if (S_ISDIR(inode->i_mode)) {
>                 inode->i_op = &f2fs_dir_inode_operations;
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index 7feead595ba5..f1e6fa2dccc9 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -643,6 +643,17 @@ int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
>                 return -EFSCORRUPTED;
>         }
>
> +       if (unlikely(f2fs_quota_file(sbi, ni->nid) &&
> +               !__is_valid_data_blkaddr(ni->blk_addr))) {
> +               set_sbi_flag(sbi, SBI_NEED_FSCK);
> +               f2fs_err_ratelimited(sbi,
> +                       "f2fs_get_node_info of %pS: inconsistent nat entry from qf_ino, "
> +                       "ino:%u, nid:%u, blkaddr:%u, ver:%u, flag:%u",
> +                       __builtin_return_address(0),
> +                       ni->ino, ni->nid, ni->blk_addr, ni->version, ni->flag);
> +               f2fs_handle_error(sbi, ERROR_INCONSISTENT_NAT);
> +       }
> +
>         /* cache nat entry */
>         if (need_cache)
>                 cache_nat_entry(sbi, nid, &ne);
> --
> 2.40.1
>
>
>
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