From 1e5c6649ff0a2049511bafa297277234011a5c58 Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zheng.z.yan@intel.com>
Date: Mon, 24 Mar 2014 13:00:54 +0800
Subject: [PATCH] ceph: check buffer size in ceph_vxattrcb_layout()

If buffer size is zero, return the size of layout vxattr. If buffer
size is not zero, check if it is large enough for layout vxattr.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
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