[Cluster-devel] [Patch 10/44] fsck.gfs2: Keep di_nlink in sync when adding links for lost+found

[Steven Whitehouse <swhiteho@redhat.com>]

Looks good,

Steve.

On Thu, 2011-08-11 at 17:01 -0400, Bob Peterson wrote:
> >From da57639e65b148bb4d2a3c6a9d98623b8ad18b04 Mon Sep 17 00:00:00 2001
> From: Bob Peterson <rpeterso@redhat.com>
> Date: Mon, 8 Aug 2011 14:21:06 -0500
> Subject: [PATCH 10/44] fsck.gfs2: Keep di_nlink in sync when adding links for
>  lost+found
> 
> When adding a ".." entry to a directory newly linked to lost+found
> fsck.gfs2 needs to update its di_nlink value to account for the new
> link.  If not, it can "correct" the di_nlink value to the wrong
> value and not find the error until a second fsck.gfs2 is done.
> This only happens in the rare case where there is no pre-existing
> ".." entry that may be reused to re-link to lost+found.
> 
> rhbz#675723
> ---
>  gfs2/fsck/lost_n_found.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/gfs2/fsck/lost_n_found.c b/gfs2/fsck/lost_n_found.c
> index 32f3c5c..b6f02b9 100644
> --- a/gfs2/fsck/lost_n_found.c
> +++ b/gfs2/fsck/lost_n_found.c
> @@ -118,6 +118,7 @@ int add_inode_to_lf(struct gfs2_inode *ip){
>  			dip = fsck_load_inode(sdp, di->dotdot_parent);
>  			if (dip->i_di.di_nlink > 0) {
>  				dip->i_di.di_nlink--;
> +				set_di_nlink(dip); /* keep inode tree in sync */
>  				log_debug(_("Decrementing its links to %d\n"),
>  					  dip->i_di.di_nlink);
>  				bmodified(dip->i_bh);
> @@ -128,6 +129,7 @@ int add_inode_to_lf(struct gfs2_inode *ip){
>  					    "Changing it to 0.\n"),
>  					  dip->i_di.di_nlink);
>  				dip->i_di.di_nlink = 0;
> +				set_di_nlink(dip); /* keep inode tree in sync */
>  				bmodified(dip->i_bh);
>  			}
>  			fsck_inode_put(&dip);