linux-ext4 - Re: [PATCH] ext4: Note the error in ext4_end

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Date:	Wed, 2 Apr 2014 18:42:40 +0200
From:	Jan Kara <jack@...e.cz>
To:	Matthew Wilcox <willy@...ux.intel.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Note the error in ext4_end_bio()

On Wed 02-04-14 10:35:07, Matthew Wilcox wrote:
> 
> ext4_end_bio() currently throws away the error that it receives.  Chances
> are this is part of a spate of errors, one of which will end up getting
> the error returned to userspace somehow, but we shouldn't take that risk.
> Also print out the errno to aid in debug.
  The patch looks good. You can add:
Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> 
> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@...el.com>
> ---
>  fs/ext4/page-io.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
> index ab95508..c18d95b 100644
> --- a/fs/ext4/page-io.c
> +++ b/fs/ext4/page-io.c
> @@ -308,13 +308,14 @@ static void ext4_end_bio(struct bio *bio, int error)
>  	if (error) {
>  		struct inode *inode = io_end->inode;
>  
> -		ext4_warning(inode->i_sb, "I/O error writing to inode %lu "
> +		ext4_warning(inode->i_sb, "I/O error %d writing to inode %lu "
>  			     "(offset %llu size %ld starting block %llu)",
> -			     inode->i_ino,
> +			     error, inode->i_ino,
>  			     (unsigned long long) io_end->offset,
>  			     (long) io_end->size,
>  			     (unsigned long long)
>  			     bi_sector >> (inode->i_blkbits - 9));
> +		mapping_set_error(inode->i_mapping, error);
>  	}
>  
>  	if (io_end->flag & EXT4_IO_END_UNWRITTEN) {
> -- 
> 1.9.0
> 
> --
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-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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