On Wed 17-01-24 19:52:23, yangerkun wrote:
> While cat mb_groups for a mounted ext4 image which has some corrupted
> group, the string return to userspace was just "I/O error" which confuse
> me a lot. Use ext4_decode_error to help distinguish different error.
>
> Signed-off-by: yangerkun <yangerkun@xxxxxxxxxx>
I guess this is an improvement :). Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/ext4/mballoc.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 139f232bdbb5..77d6113e2822 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -2991,6 +2991,7 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v)
> struct super_block *sb = pde_data(file_inode(seq->file));
> ext4_group_t group = (ext4_group_t) ((unsigned long) v);
> int i, err;
> + char nbuf[16];
> struct ext4_buddy e4b;
> struct ext4_group_info *grinfo;
> unsigned char blocksize_bits = min_t(unsigned char,
> @@ -3017,7 +3018,7 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v)
> if (unlikely(EXT4_MB_GRP_NEED_INIT(grinfo))) {
> err = ext4_mb_load_buddy(sb, group, &e4b);
> if (err) {
> - seq_printf(seq, "#%-5u: I/O error\n", group);
> + seq_printf(seq, "#%-5u: %s\n", group, ext4_decode_error(NULL, err, nbuf));
> return 0;
> }
> ext4_mb_unload_buddy(&e4b);
> --
> 2.39.2
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
