Re: [PATCH] xfs: log proper length of btree block in scrub/repair

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On Tue, Aug 27, 2019 at 02:17:36PM -0500, Eric Sandeen wrote:
> xfs_trans_log_buf() takes a final argument of the last byte to
> log in the buffer; b_length is in basic blocks, so this isn't
> the correct last byte.  Fix it.
> 
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

--D

> ---
> 
> just found by inspection/pattern matching, not tested TBH...
> 
> diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c
> index 4cfeec57fb05..7bcc755beb40 100644
> --- a/fs/xfs/scrub/repair.c
> +++ b/fs/xfs/scrub/repair.c
> @@ -351,7 +351,7 @@ xrep_init_btblock(
>  	xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
>  	xfs_btree_init_block(mp, bp, btnum, 0, 0, sc->sa.agno);
>  	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_BTREE_BUF);
> -	xfs_trans_log_buf(tp, bp, 0, bp->b_length);
> +	xfs_trans_log_buf(tp, bp, 0, BBTOB(bp->b_length) - 1);
>  	bp->b_ops = ops;
>  	*bpp = bp;
>  
> 



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