[Ocfs2-devel] [PATCH] allow for more than one data extent when creating xattr

[Srinivas Eeda]

looks good to me.
Reviewed-by: Srinivas Eeda <srinivas.eeda at oracle.com>

On 03/10/2014 02:08 PM, Tariq Saeed wrote:
> Orabug: 18108070
>
> ocfs2_xattr_extend_allocation() hits panic when creating xattr during
> data extent alloc phase. The problem occurs if due to local alloc
> fragmentation, clusters are spread over multiple extents.  In this case
> ocfs2_add_clusters_in_btree() finds no space to store more than one extent
> record and therefore fails returning RESTART_META.  The situation is
> anticipated for xattr update case but not xattr create case. This fix
> simply ports that code to create case.
>
> Signed-off-by: Tariq Saeed <tariq.x.saeed at oracle.com>
> ---
>   fs/ocfs2/xattr.c |    9 ++++++++-
>   1 files changed, 8 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
> index 5b8d944..bfa1c37 100644
> --- a/fs/ocfs2/xattr.c
> +++ b/fs/ocfs2/xattr.c
> @@ -3207,8 +3207,15 @@ meta_guess:
>   			clusters_add += 1;
>   		}
>   	} else {
> -		meta_add += 1;
>   		credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
> +		if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
> +			struct ocfs2_extent_list *el = &def_xv.xv.xr_list;
> +			meta_add += ocfs2_extend_meta_needed(el);
> +			credits += ocfs2_calc_extend_credits(inode->i_sb,
> +							     el, 1);
> +		} else {
> +			meta_add += 1;
> +		}
>   	}
>   out:
>   	if (clusters_need)