[Ocfs2-devel] Fix for online resize with metaecc

[Tao Ma <tao.ma@oracle.com>]

Joel Becker wrote:
> Mark figured out what happened with bug 1214 - online resize writes out
> the superblocks without calculating metaecc.  Here's a patch to fix it.
> 
> Tao, Tiger, Tristan... Can one of you test this quickly?
Tested-by: Tao Ma <tao.ma@oracle.com>
> 
> Joel
> 
>>From d917c07dd45b16827a207e90a145ae248416c96c Mon Sep 17 00:00:00 2001
> From: Joel Becker <joel.becker@oracle.com>
> Date: Wed, 31 Mar 2010 18:25:44 -0700
> Subject: [PATCH] ocfs2: Compute metaecc for superblocks during online resize.
> 
> Online resize writes out the new superblock and its backups directly.
> The metaecc data wasn't being recomputed.  Let's do that directly.
> 
> Signed-off-by: Joel Becker <joel.becker@oracle.com>
> Cc: stable at kernel.org
> ---
>  fs/ocfs2/buffer_head_io.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
> index 21c808f..b18c6d6 100644
> --- a/fs/ocfs2/buffer_head_io.c
> +++ b/fs/ocfs2/buffer_head_io.c
> @@ -407,6 +407,7 @@ int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
>  				struct buffer_head *bh)
>  {
>  	int ret = 0;
> +	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
>  
>  	mlog_entry_void();
>  
> @@ -426,6 +427,7 @@ int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
>  
>  	get_bh(bh); /* for end_buffer_write_sync() */
>  	bh->b_end_io = end_buffer_write_sync;
> +	ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &di->i_check);
>  	submit_bh(WRITE, bh);
>  
>  	wait_on_buffer(bh);