[Cluster-devel] [GFS2 PATCH] GFS2: Increase i_writecount during gfs2_setattr_chown

[Steven Whitehouse <swhiteho@redhat.com>]

Hi,

I've added this to the -nmw git tree. Thanks,

Steve.

On Mon, 2014-01-06 at 17:16 -0500, Bob Peterson wrote:
> Hi,
> 
> This patch calls get_write_access in function gfs2_setattr_chown,
> which merely increases inode->i_writecount for the duration of the
> function. That will ensure that any file closes won't delete the
> inode's multi-block reservation while the function is running.
> It also ensures that a multi-block reservation exists when needed
> for quota change operations during the chown.
> 
> Regards,
> 
> Bob Peterson
> Red Hat File Systems
> 
> Signed-off-by: Bob Peterson <rpeterso@redhat.com> 
> ---
> diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
> index 7119504..87bc229 100644
> --- a/fs/gfs2/inode.c
> +++ b/fs/gfs2/inode.c
> @@ -1607,10 +1607,22 @@ static int setattr_chown(struct inode *inode, struct iattr *attr)
>  	if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
>  		ogid = ngid = NO_GID_QUOTA_CHANGE;
>  
> -	error = gfs2_quota_lock(ip, nuid, ngid);
> +	error = get_write_access(inode);
>  	if (error)
>  		return error;
>  
> +	error = gfs2_rs_alloc(ip);
> +	if (error)
> +		goto out;
> +
> +	error = gfs2_rindex_update(sdp);
> +	if (error)
> +		goto out;
> +
> +	error = gfs2_quota_lock(ip, nuid, ngid);
> +	if (error)
> +		goto out;
> +
>  	if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
>  	    !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
>  		error = gfs2_quota_check(ip, nuid, ngid);
> @@ -1637,6 +1649,8 @@ out_end_trans:
>  	gfs2_trans_end(sdp);
>  out_gunlock_q:
>  	gfs2_quota_unlock(ip);
> +out:
> +	put_write_access(inode);
>  	return error;
>  }
>  
>