On Tue, Apr 02, 2024 at 06:48:40PM +0300, Eugen Hristev via Linux-f2fs-devel 
wrote:
> If the volume is in strict mode, generi c_ci_compare can report a broken
> encoding name.  This will not trigger on a bad lookup, which is caught
> earlier, only if the actual disk name is bad.
> 
> Suggested-by: Gabriel Krisman Bertazi <[email protected]>
> Signed-off-by: Eugen Hristev <[email protected]>
> ---
>  fs/f2fs/dir.c | 15 ++++++++++-----
>  1 file changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
> index 88b0045d0c4f..64286d80dd30 100644
> --- a/fs/f2fs/dir.c
> +++ b/fs/f2fs/dir.c
> @@ -192,11 +192,16 @@ static inline int f2fs_match_name(const struct inode 
> *dir,
>       struct fscrypt_name f;
>  
>  #if IS_ENABLED(CONFIG_UNICODE)
> -     if (fname->cf_name.name)
> -             return generic_ci_match(dir, fname->usr_fname,
> -                                     &fname->cf_name,
> -                                     de_name, de_name_len);
> -
> +     if (fname->cf_name.name) {
> +             int ret = generic_ci_match(dir, fname->usr_fname,
> +                                        &fname->cf_name,
> +                                        de_name, de_name_len);
> +             if (ret == -EINVAL)
> +                     f2fs_warn(F2FS_SB(dir->i_sb),
> +                             "Directory contains filename that is invalid 
> UTF-8");
> +

Shouldn't this use f2fs_warn_ratelimited?

- Eric


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