diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index 5f31724aceae..0ad66052d93d 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -2482,10 +2482,6 @@ struct lmv_desc {
 	struct obd_uuid ld_uuid;
 };
 
-#define MEA_MAGIC_LAST_CHAR      0xb2221ca1
-#define MEA_MAGIC_ALL_CHARS      0xb222a11c
-#define MEA_MAGIC_HASH_SEGMENT   0xb222a11b
-
 /* lmv structures */
 #define LMV_MAGIC_V1	0x0CD10CD0	/* normal stripe lmv magic */
 #define LMV_USER_MAGIC	0x0CD20CD0	/* default lmv magic*/
diff --git a/drivers/staging/lustre/lustre/include/lustre_lmv.h b/drivers/staging/lustre/lustre/include/lustre_lmv.h
index 0620c8c4b5f1..784d67b87423 100644
--- a/drivers/staging/lustre/lustre/include/lustre_lmv.h
+++ b/drivers/staging/lustre/lustre/include/lustre_lmv.h
@@ -41,12 +41,15 @@ struct lmv_oinfo {
 };
 
 struct lmv_stripe_md {
-	__u32	mea_magic;
-	__u32	mea_count;
-	__u32	mea_master;
-	__u32	mea_padding;
-	char	mea_pool_name[LOV_MAXPOOLNAME];
-	struct lu_fid mea_ids[0];
+	__u32	lsm_md_magic;
+	__u32	lsm_md_stripe_count;
+	__u32	lsm_md_master_mdt_index;
+	__u32	lsm_md_hash_type;
+	__u32	lsm_md_layout_version;
+	__u32	lsm_md_default_count;
+	__u32	lsm_md_default_index;
+	char	lsm_md_pool_name[LOV_MAXPOOLNAME];
+	struct lmv_oinfo lsm_md_oinfo[0];
 };
 
 union lmv_mds_md;
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_internal.h b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
index ab01560d51df..90a97866358a 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_internal.h
+++ b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
@@ -94,6 +94,13 @@ lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
 	return lmv_get_target(lmv, mds);
 }
 
+static inline int lmv_stripe_md_size(int stripe_count)
+{
+	struct lmv_stripe_md *lsm;
+
+	return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
+}
+
 struct lmv_tgt_desc
 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
 		struct lu_fid *fid);
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index 8e83263b20a2..1ba59008eabb 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -2376,105 +2376,224 @@ static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	return -EINVAL;
 }
 
-static int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
-		      struct lov_stripe_md *lsm)
+static int lmv_pack_md_v1(const struct lmv_stripe_md *lsm,
+			  struct lmv_mds_md_v1 *lmm1)
 {
-	struct obd_device	 *obd = class_exp2obd(exp);
-	struct lmv_obd	    *lmv = &obd->u.lmv;
-	struct lmv_stripe_md      *meap;
-	struct lmv_stripe_md      *lsmp;
-	int			mea_size;
-	int			i;
+	int cplen;
+	int i;
 
-	mea_size = lmv_get_easize(lmv);
-	if (!lmmp)
-		return mea_size;
+	lmm1->lmv_magic = cpu_to_le32(lsm->lsm_md_magic);
+	lmm1->lmv_stripe_count = cpu_to_le32(lsm->lsm_md_stripe_count);
+	lmm1->lmv_master_mdt_index = cpu_to_le32(lsm->lsm_md_master_mdt_index);
+	lmm1->lmv_hash_type = cpu_to_le32(lsm->lsm_md_hash_type);
+	cplen = strlcpy(lmm1->lmv_pool_name, lsm->lsm_md_pool_name,
+			sizeof(lmm1->lmv_pool_name));
+	if (cplen >= sizeof(lmm1->lmv_pool_name))
+		return -E2BIG;
 
+	for (i = 0; i < lsm->lsm_md_stripe_count; i++)
+		fid_cpu_to_le(&lmm1->lmv_stripe_fids[i],
+			      &lsm->lsm_md_oinfo[i].lmo_fid);
+	return 0;
+}
+
+int lmv_pack_md(union lmv_mds_md **lmmp, const struct lmv_stripe_md *lsm,
+		int stripe_count)
+{
+	int lmm_size = 0, rc = 0;
+	bool allocated = false;
+
+	LASSERT(lmmp);
+
+	/* Free lmm */
 	if (*lmmp && !lsm) {
+		int stripe_cnt;
+
+		stripe_cnt = lmv_mds_md_stripe_count_get(*lmmp);
+		lmm_size = lmv_mds_md_size(stripe_cnt,
+					   le32_to_cpu((*lmmp)->lmv_magic));
+		if (!lmm_size)
+			return -EINVAL;
 		kvfree(*lmmp);
 		*lmmp = NULL;
 		return 0;
 	}
 
-	if (!*lmmp) {
-		*lmmp = libcfs_kvzalloc(mea_size, GFP_NOFS);
+	/* Alloc lmm */
+	if (!*lmmp && !lsm) {
+		lmm_size = lmv_mds_md_size(stripe_count, LMV_MAGIC);
+		LASSERT(lmm_size > 0);
+		*lmmp = libcfs_kvzalloc(lmm_size, GFP_NOFS);
 		if (!*lmmp)
 			return -ENOMEM;
+		lmv_mds_md_stripe_count_set(*lmmp, stripe_count);
+		(*lmmp)->lmv_magic = cpu_to_le32(LMV_MAGIC);
+		return lmm_size;
 	}
 
-	if (!lsm)
-		return mea_size;
-
-	lsmp = (struct lmv_stripe_md *)lsm;
-	meap = (struct lmv_stripe_md *)*lmmp;
-
-	if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
-	    lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
-		return -EINVAL;
-
-	meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
-	meap->mea_count = cpu_to_le32(lsmp->mea_count);
-	meap->mea_master = cpu_to_le32(lsmp->mea_master);
-
-	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		meap->mea_ids[i] = lsmp->mea_ids[i];
-		fid_cpu_to_le(&meap->mea_ids[i], &lsmp->mea_ids[i]);
+	/* pack lmm */
+	LASSERT(lsm);
+	lmm_size = lmv_mds_md_size(lsm->lsm_md_stripe_count,
+				   lsm->lsm_md_magic);
+	if (!*lmmp) {
+		*lmmp = libcfs_kvzalloc(lmm_size, GFP_NOFS);
+		if (!*lmmp)
+			return -ENOMEM;
+		allocated = true;
 	}
 
-	return mea_size;
+	switch (lsm->lsm_md_magic) {
+	case LMV_MAGIC_V1:
+		rc = lmv_pack_md_v1(lsm, &(*lmmp)->lmv_md_v1);
+		break;
+	default:
+		rc = -EINVAL;
+		break;
+	}
+
+	if (rc && allocated) {
+		kvfree(*lmmp);
+		*lmmp = NULL;
+	}
+
+	return lmm_size;
+}
+EXPORT_SYMBOL(lmv_pack_md);
+
+static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
+			    const struct lmv_mds_md_v1 *lmm1)
+{
+	struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
+	int stripe_count;
+	int rc = 0;
+	int cplen;
+	int i;
+
+	lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
+	lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
+	lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
+	lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
+	lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
+	cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
+			sizeof(lsm->lsm_md_pool_name));
+
+	if (cplen >= sizeof(lsm->lsm_md_pool_name))
+		return -E2BIG;
+
+	CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d layout_version %d\n",
+	       lsm->lsm_md_stripe_count, lsm->lsm_md_master_mdt_index,
+	       lsm->lsm_md_hash_type, lsm->lsm_md_layout_version);
+
+	stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
+	for (i = 0; i < le32_to_cpu(stripe_count); i++) {
+		fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
+			      &lmm1->lmv_stripe_fids[i]);
+		rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
+				    &lsm->lsm_md_oinfo[i].lmo_mds);
+		if (rc)
+			return rc;
+		CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
+		       PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
+	}
+
+	return rc;
 }
 
-static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
-			struct lov_mds_md *lmm, int lmm_size)
+int lmv_unpack_md(struct obd_export *exp, struct lmv_stripe_md **lsmp,
+		  const union lmv_mds_md *lmm, int stripe_count)
 {
-	struct obd_device	  *obd = class_exp2obd(exp);
-	struct lmv_stripe_md      **tmea = (struct lmv_stripe_md **)lsmp;
-	struct lmv_stripe_md       *mea = (struct lmv_stripe_md *)lmm;
-	struct lmv_obd	     *lmv = &obd->u.lmv;
-	int			 mea_size;
-	int			 i;
-	__u32		       magic;
+	struct lmv_stripe_md *lsm;
+	bool allocated = false;
+	int lsm_size, rc;
 
-	mea_size = lmv_get_easize(lmv);
-	if (!lsmp)
-		return mea_size;
+	LASSERT(lsmp);
 
-	if (*lsmp && !lmm) {
-		kvfree(*tmea);
+	lsm = *lsmp;
+	/* Free memmd */
+	if (lsm && !lmm) {
+		int i;
+
+		for (i = 1; i < lsm->lsm_md_stripe_count; i++) {
+			if (lsm->lsm_md_oinfo[i].lmo_root)
+				iput(lsm->lsm_md_oinfo[i].lmo_root);
+		}
+
+		kvfree(lsm);
 		*lsmp = NULL;
 		return 0;
 	}
 
-	LASSERT(mea_size == lmm_size);
-
-	*tmea = libcfs_kvzalloc(mea_size, GFP_NOFS);
-	if (!*tmea)
-		return -ENOMEM;
-
-	if (!lmm)
-		return mea_size;
-
-	if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
-	    mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
-	    mea->mea_magic == MEA_MAGIC_HASH_SEGMENT) {
-		magic = le32_to_cpu(mea->mea_magic);
-	} else {
-		/*
-		 * Old mea is not handled here.
-		 */
-		CERROR("Old not supportable EA is found\n");
-		LBUG();
+	/* Alloc memmd */
+	if (!lsm && !lmm) {
+		lsm_size = lmv_stripe_md_size(stripe_count);
+		lsm = libcfs_kvzalloc(lsm_size, GFP_NOFS);
+		if (!lsm)
+			return -ENOMEM;
+		lsm->lsm_md_stripe_count = stripe_count;
+		*lsmp = lsm;
+		return 0;
 	}
 
-	(*tmea)->mea_magic = magic;
-	(*tmea)->mea_count = le32_to_cpu(mea->mea_count);
-	(*tmea)->mea_master = le32_to_cpu(mea->mea_master);
-
-	for (i = 0; i < (*tmea)->mea_count; i++) {
-		(*tmea)->mea_ids[i] = mea->mea_ids[i];
-		fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
+	/* Unpack memmd */
+	if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1) {
+		CERROR("%s: invalid magic %x.\n", exp->exp_obd->obd_name,
+		       le32_to_cpu(lmm->lmv_magic));
+		return -EINVAL;
 	}
-	return mea_size;
+
+	lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
+	if (!lsm) {
+		lsm = libcfs_kvzalloc(lsm_size, GFP_NOFS);
+		if (!lsm)
+			return -ENOMEM;
+		allocated = true;
+		*lsmp = lsm;
+	}
+
+	switch (le32_to_cpu(lmm->lmv_magic)) {
+	case LMV_MAGIC_V1:
+		rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
+		break;
+	default:
+		CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
+		       le32_to_cpu(lmm->lmv_magic));
+		rc = -EINVAL;
+		break;
+	}
+
+	if (rc && allocated) {
+		kvfree(lsm);
+		*lsmp = NULL;
+		lsm_size = rc;
+	}
+	return lsm_size;
+}
+
+int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
+		 struct lov_mds_md *lmm, int disk_len)
+{
+	return lmv_unpack_md(exp, (struct lmv_stripe_md **)lsmp,
+			     (union lmv_mds_md *)lmm, disk_len);
+}
+
+int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
+	       struct lov_stripe_md *lsm)
+{
+	const struct lmv_stripe_md *lmv = (struct lmv_stripe_md *)lsm;
+	struct obd_device *obd = exp->exp_obd;
+	struct lmv_obd *lmv_obd = &obd->u.lmv;
+	int stripe_count;
+
+	if (!lmmp) {
+		if (lsm)
+			stripe_count = lmv->lsm_md_stripe_count;
+		else
+			stripe_count = lmv_obd->desc.ld_tgt_count;
+
+		return lmv_mds_md_size(stripe_count, LMV_MAGIC_V1);
+	}
+
+	return lmv_pack_md((union lmv_mds_md **)lmmp, lmv, 0);
 }
 
 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,