From: Jinshan Xiong <jinshan.xiong@intel.com>
Date: Mon, 8 Jan 2018 21:29:51 +0000 (+0000)
Subject: LU-10437 lod: clear layout header when generating layout
X-Git-Tag: 2.10.4-RC1~122
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=0e38e97e2c4209ac31f3f6f9bc245da9a991006c;p=fs%2Flustre-release.git

LU-10437 lod: clear layout header when generating layout

LOD needs to clear layout header otherwise the lcm_flags and
lcm_padding will be random data, which will create issues when
those fields are used by future module.

It already confused FLR because it uses lcm_flags and mirror_count
to do sanity check.

Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Change-Id: If9511e6691144debd51ccab575ef4479d0c9b865
Reviewed-on: https://review.whamcloud.com/30784
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
---

diff --git a/lustre/lod/lod_lov.c b/lustre/lod/lod_lov.c
index 08d5ce7..1f1133c 100644
--- a/lustre/lod/lod_lov.c
+++ b/lustre/lod/lod_lov.c
@@ -941,6 +941,8 @@ int lod_generate_lovea(const struct lu_env *env, struct lod_object *lo,
 	}
 
 	lcm = (struct lov_comp_md_v1 *)lmm;
+	memset(lcm, 0, sizeof(*lcm));
+
 	lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_COMP_V1);
 	lcm->lcm_entry_count = cpu_to_le16(comp_cnt);