[deliverable/linux.git] / drivers / staging / lustre / lustre / lov / lov_ea.c

/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/lov/lov_ea.c
 *
 * Author: Wang Di <wangdi@clusterfs.com>
 */

#define DEBUG_SUBSYSTEM S_LOV

#include <asm/div64.h>
#include "../../include/linux/libcfs/libcfs.h"

#include "../include/obd_class.h"
#include "../include/lustre/lustre_idl.h"

#include "lov_internal.h"

struct lovea_unpack_args {
	struct lov_stripe_md *lsm;
	int		   cursor;
};

static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
				 __u16 stripe_count)
{
	if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
		CERROR("bad stripe count %d\n", stripe_count);
		lov_dump_lmm_common(D_WARNING, lmm);
		return -EINVAL;
	}

	if (lmm_oi_id(&lmm->lmm_oi) == 0) {
		CERROR("zero object id\n");
		lov_dump_lmm_common(D_WARNING, lmm);
		return -EINVAL;
	}

	if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
		CERROR("bad striping pattern\n");
		lov_dump_lmm_common(D_WARNING, lmm);
		return -EINVAL;
	}

	if (lmm->lmm_stripe_size == 0 ||
	    (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
		CERROR("bad stripe size %u\n",
		       le32_to_cpu(lmm->lmm_stripe_size));
		lov_dump_lmm_common(D_WARNING, lmm);
		return -EINVAL;
	}
	return 0;
}

struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
{
	struct lov_stripe_md *lsm;
	struct lov_oinfo     *loi;
	int		   i, oinfo_ptrs_size;

	LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);

	oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
	*size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;

	OBD_ALLOC_LARGE(lsm, *size);
	if (!lsm)
		return NULL;

	for (i = 0; i < stripe_count; i++) {
		OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
		if (loi == NULL)
			goto err;
		lsm->lsm_oinfo[i] = loi;
	}
	lsm->lsm_stripe_count = stripe_count;
	return lsm;

err:
	while (--i >= 0)
		OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
	OBD_FREE_LARGE(lsm, *size);
	return NULL;
}

void lsm_free_plain(struct lov_stripe_md *lsm)
{
	__u16 stripe_count = lsm->lsm_stripe_count;
	int i;

	for (i = 0; i < stripe_count; i++)
		OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
			      sizeof(struct lov_oinfo));
	OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
		       stripe_count * sizeof(struct lov_oinfo *));
}

static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
				struct lov_mds_md *lmm)
{
	/*
	 * This supposes lov_mds_md_v1/v3 first fields are
	 * are the same
	 */
	lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
	lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
	lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
	lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
	lsm->lsm_pool_name[0] = '\0';
}

static void
lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
			   u64 *lov_off, u64 *swidth)
{
	if (swidth)
		*swidth = (u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
}

static void
lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
			   u64 *lov_off, u64 *swidth)
{
	if (swidth)
		*swidth = (u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
}

static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
			     struct obd_export *md_exp)
{
	return 0;
}

/* Find minimum stripe maxbytes value.  For inactive or
 * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
{
	struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;

	if (imp == NULL || !tgt->ltd_active) {
		*stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
		return;
	}

	spin_lock(&imp->imp_lock);
	if (imp->imp_state == LUSTRE_IMP_FULL &&
	    (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
	    imp->imp_connect_data.ocd_maxbytes > 0) {
		if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
			*stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
	} else {
		*stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
	}
	spin_unlock(&imp->imp_lock);
}

static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
			     __u16 *stripe_count)
{
	if (lmm_bytes < sizeof(*lmm)) {
		CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
		       lmm_bytes, (int)sizeof(*lmm));
		return -EINVAL;
	}

	*stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
	if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
		*stripe_count = 0;

	if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
		CERROR("LOV EA V1 too small: %d, need %d\n",
		       lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
		lov_dump_lmm_common(D_WARNING, lmm);
		return -EINVAL;
	}

	return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
}

int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
		    struct lov_mds_md_v1 *lmm)
{
	struct lov_oinfo *loi;
	int i;
	int stripe_count;
	__u64 stripe_maxbytes = OBD_OBJECT_EOF;

	lsm_unpackmd_common(lsm, lmm);

	stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;

	for (i = 0; i < stripe_count; i++) {
		/* XXX LOV STACKING call down to osc_unpackmd() */
		loi = lsm->lsm_oinfo[i];
		ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
		loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
		loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
		if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
			CERROR("OST index %d more than OST count %d\n",
			       loi->loi_ost_idx, lov->desc.ld_tgt_count);
			lov_dump_lmm_v1(D_WARNING, lmm);
			return -EINVAL;
		}
		if (!lov->lov_tgts[loi->loi_ost_idx]) {
			CERROR("OST index %d missing\n", loi->loi_ost_idx);
			lov_dump_lmm_v1(D_WARNING, lmm);
			return -EINVAL;
		}
		/* calculate the minimum stripe max bytes */
		lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
				 &stripe_maxbytes);
	}

	lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
	if (lsm->lsm_stripe_count == 0)
		lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;

	return 0;
}

const struct lsm_operations lsm_v1_ops = {
	.lsm_free	    = lsm_free_plain,
	.lsm_destroy	 = lsm_destroy_plain,
	.lsm_stripe_by_index    = lsm_stripe_by_index_plain,
	.lsm_stripe_by_offset   = lsm_stripe_by_offset_plain,
	.lsm_lmm_verify	 = lsm_lmm_verify_v1,
	.lsm_unpackmd	   = lsm_unpackmd_v1,
};

static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
			     __u16 *stripe_count)
{
	struct lov_mds_md_v3 *lmm;

	lmm = (struct lov_mds_md_v3 *)lmmv1;

	if (lmm_bytes < sizeof(*lmm)) {
		CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
		       lmm_bytes, (int)sizeof(*lmm));
		return -EINVAL;
	}

	*stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
	if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
		*stripe_count = 0;

	if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
		CERROR("LOV EA V3 too small: %d, need %d\n",
		       lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
		lov_dump_lmm_common(D_WARNING, lmm);
		return -EINVAL;
	}

	return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
				     *stripe_count);
}

int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
		    struct lov_mds_md *lmmv1)
{
	struct lov_mds_md_v3 *lmm;
	struct lov_oinfo *loi;
	int i;
	int stripe_count;
	__u64 stripe_maxbytes = OBD_OBJECT_EOF;
	int cplen = 0;

	lmm = (struct lov_mds_md_v3 *)lmmv1;

	lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);

	stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;

	cplen = strlcpy(lsm->lsm_pool_name, lmm->lmm_pool_name,
			sizeof(lsm->lsm_pool_name));
	if (cplen >= sizeof(lsm->lsm_pool_name))
		return -E2BIG;

	for (i = 0; i < stripe_count; i++) {
		/* XXX LOV STACKING call down to osc_unpackmd() */
		loi = lsm->lsm_oinfo[i];
		ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
		loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
		loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
		if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
			CERROR("OST index %d more than OST count %d\n",
			       loi->loi_ost_idx, lov->desc.ld_tgt_count);
			lov_dump_lmm_v3(D_WARNING, lmm);
			return -EINVAL;
		}
		if (!lov->lov_tgts[loi->loi_ost_idx]) {
			CERROR("OST index %d missing\n", loi->loi_ost_idx);
			lov_dump_lmm_v3(D_WARNING, lmm);
			return -EINVAL;
		}
		/* calculate the minimum stripe max bytes */
		lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
				 &stripe_maxbytes);
	}

	lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
	if (lsm->lsm_stripe_count == 0)
		lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;

	return 0;
}

const struct lsm_operations lsm_v3_ops = {
	.lsm_free	    = lsm_free_plain,
	.lsm_destroy	 = lsm_destroy_plain,
	.lsm_stripe_by_index    = lsm_stripe_by_index_plain,
	.lsm_stripe_by_offset   = lsm_stripe_by_offset_plain,
	.lsm_lmm_verify	 = lsm_lmm_verify_v3,
	.lsm_unpackmd	   = lsm_unpackmd_v3,
};

void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
{
	CDEBUG(level, "lsm %p, objid " DOSTID ", maxbytes %#llx, magic 0x%08X, stripe_size %u, stripe_count %u, refc: %d, layout_gen %u, pool [" LOV_POOLNAMEF "]\n",
	       lsm,
	       POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
	       lsm->lsm_stripe_size, lsm->lsm_stripe_count,
	       atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen,
	       lsm->lsm_pool_name);
}
Commit	Line	Data
d7e09d03 PT	1	/*
	2	* GPL HEADER START
	3	*
	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License version 2 for more details (a copy is included
	14	* in the LICENSE file that accompanied this code).
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* version 2 along with this program; If not, see
	18	* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
	19	*
	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	21	* CA 95054 USA or visit www.sun.com if you need additional information or
	22	* have any questions.
	23	*
	24	* GPL HEADER END
	25	*/
	26	/*
	27	* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
	30	* Copyright (c) 2011, 2012, Intel Corporation.
	31	*/
	32	/*
	33	* This file is part of Lustre, http://www.lustre.org/
	34	* Lustre is a trademark of Sun Microsystems, Inc.
	35	*
	36	* lustre/lov/lov_ea.c
	37	*
	38	* Author: Wang Di <wangdi@clusterfs.com>
	39	*/
	40
	41	#define DEBUG_SUBSYSTEM S_LOV
	42
	43	#include <asm/div64.h>
9fdaf8c0	44	#include "../../include/linux/libcfs/libcfs.h"
d7e09d03	45
0cf0f7a7 GKH	46	#include "../include/obd_class.h"
0cf0f7a7 GKH	47	#include "../include/lustre/lustre_idl.h"
d7e09d03 PT	48
	49	#include "lov_internal.h"
	50
	51	struct lovea_unpack_args {
	52	struct lov_stripe_md *lsm;
	53	int cursor;
	54	};
	55
	56	static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
	57	__u16 stripe_count)
	58	{
5dd16419	59	if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
d7e09d03	60	CERROR("bad stripe count %d\n", stripe_count);
53b78538	61	lov_dump_lmm_common(D_WARNING, lmm);
d7e09d03 PT	62	return -EINVAL;
	63	}
	64
	65	if (lmm_oi_id(&lmm->lmm_oi) == 0) {
	66	CERROR("zero object id\n");
53b78538	67	lov_dump_lmm_common(D_WARNING, lmm);
d7e09d03 PT	68	return -EINVAL;
	69	}
	70
5dd16419	71	if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
d7e09d03	72	CERROR("bad striping pattern\n");
53b78538	73	lov_dump_lmm_common(D_WARNING, lmm);
d7e09d03 PT	74	return -EINVAL;
	75	}
	76
	77	if (lmm->lmm_stripe_size == 0 \|\|
53b78538	78	(le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
d7e09d03 PT	79	CERROR("bad stripe size %u\n",
d7e09d03 PT	80	le32_to_cpu(lmm->lmm_stripe_size));
53b78538	81	lov_dump_lmm_common(D_WARNING, lmm);
d7e09d03 PT	82	return -EINVAL;
	83	}
	84	return 0;
	85	}
	86
	87	struct lov_stripe_md lsm_alloc_plain(__u16 stripe_count, int size)
	88	{
	89	struct lov_stripe_md *lsm;
	90	struct lov_oinfo *loi;
	91	int i, oinfo_ptrs_size;
	92
	93	LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
	94
	95	oinfo_ptrs_size = sizeof(struct lov_oinfo ) stripe_count;
	96	*size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
	97
	98	OBD_ALLOC_LARGE(lsm, *size);
	99	if (!lsm)
76b8f538	100	return NULL;
d7e09d03 PT	101
d7e09d03 PT	102	for (i = 0; i < stripe_count; i++) {
0be19afa	103	OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
d7e09d03 PT	104	if (loi == NULL)
	105	goto err;
	106	lsm->lsm_oinfo[i] = loi;
	107	}
	108	lsm->lsm_stripe_count = stripe_count;
	109	return lsm;
	110
	111	err:
	112	while (--i >= 0)
	113	OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
	114	OBD_FREE_LARGE(lsm, *size);
	115	return NULL;
	116	}
	117
	118	void lsm_free_plain(struct lov_stripe_md *lsm)
	119	{
	120	__u16 stripe_count = lsm->lsm_stripe_count;
	121	int i;
	122
	123	for (i = 0; i < stripe_count; i++)
	124	OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
	125	sizeof(struct lov_oinfo));
	126	OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
	127	stripe_count * sizeof(struct lov_oinfo *));
	128	}
	129
	130	static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
	131	struct lov_mds_md *lmm)
	132	{
	133	/*
	134	* This supposes lov_mds_md_v1/v3 first fields are
	135	* are the same
	136	*/
	137	lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
	138	lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
	139	lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
	140	lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
	141	lsm->lsm_pool_name[0] = '\0';
	142	}
	143
	144	static void
	145	lsm_stripe_by_index_plain(struct lov_stripe_md lsm, int stripeno,
21aef7d9	146	u64 lov_off, u64 swidth)
d7e09d03 PT	147	{
d7e09d03 PT	148	if (swidth)
21aef7d9	149	swidth = (u64)lsm->lsm_stripe_size lsm->lsm_stripe_count;
d7e09d03 PT	150	}
	151
	152	static void
	153	lsm_stripe_by_offset_plain(struct lov_stripe_md lsm, int stripeno,
21aef7d9	154	u64 lov_off, u64 swidth)
d7e09d03 PT	155	{
d7e09d03 PT	156	if (swidth)
21aef7d9	157	swidth = (u64)lsm->lsm_stripe_size lsm->lsm_stripe_count;
d7e09d03 PT	158	}
	159
	160	static int lsm_destroy_plain(struct lov_stripe_md lsm, struct obdo oa,
	161	struct obd_export *md_exp)
	162	{
	163	return 0;
	164	}
	165
	166	/* Find minimum stripe maxbytes value. For inactive or
	167	* reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
	168	static void lov_tgt_maxbytes(struct lov_tgt_desc tgt, __u64 stripe_maxbytes)
	169	{
	170	struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
	171
	172	if (imp == NULL \|\| !tgt->ltd_active) {
	173	*stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
	174	return;
	175	}
	176
	177	spin_lock(&imp->imp_lock);
	178	if (imp->imp_state == LUSTRE_IMP_FULL &&
	179	(imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
	180	imp->imp_connect_data.ocd_maxbytes > 0) {
	181	if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
	182	*stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
	183	} else {
	184	*stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
	185	}
	186	spin_unlock(&imp->imp_lock);
	187	}
	188
	189	static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
	190	__u16 *stripe_count)
	191	{
	192	if (lmm_bytes < sizeof(*lmm)) {
	193	CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
	194	lmm_bytes, (int)sizeof(*lmm));
	195	return -EINVAL;
	196	}
	197
	198	*stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
5dd16419 JX	199	if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
5dd16419 JX	200	*stripe_count = 0;
d7e09d03 PT	201
	202	if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
	203	CERROR("LOV EA V1 too small: %d, need %d\n",
	204	lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
53b78538	205	lov_dump_lmm_common(D_WARNING, lmm);
d7e09d03 PT	206	return -EINVAL;
	207	}
	208
	209	return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
	210	}
	211
	212	int lsm_unpackmd_v1(struct lov_obd lov, struct lov_stripe_md lsm,
	213	struct lov_mds_md_v1 *lmm)
	214	{
	215	struct lov_oinfo *loi;
	216	int i;
5dd16419	217	int stripe_count;
d7e09d03 PT	218	__u64 stripe_maxbytes = OBD_OBJECT_EOF;
	219
	220	lsm_unpackmd_common(lsm, lmm);
	221
5dd16419 JX	222	stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
	223
	224	for (i = 0; i < stripe_count; i++) {
d7e09d03 PT	225	/* XXX LOV STACKING call down to osc_unpackmd() */
	226	loi = lsm->lsm_oinfo[i];
	227	ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
	228	loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
	229	loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
	230	if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
	231	CERROR("OST index %d more than OST count %d\n",
	232	loi->loi_ost_idx, lov->desc.ld_tgt_count);
	233	lov_dump_lmm_v1(D_WARNING, lmm);
	234	return -EINVAL;
	235	}
	236	if (!lov->lov_tgts[loi->loi_ost_idx]) {
	237	CERROR("OST index %d missing\n", loi->loi_ost_idx);
	238	lov_dump_lmm_v1(D_WARNING, lmm);
	239	return -EINVAL;
	240	}
	241	/* calculate the minimum stripe max bytes */
	242	lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
	243	&stripe_maxbytes);
	244	}
	245
	246	lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
5dd16419 JX	247	if (lsm->lsm_stripe_count == 0)
5dd16419 JX	248	lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
d7e09d03 PT	249
	250	return 0;
	251	}
	252
	253	const struct lsm_operations lsm_v1_ops = {
	254	.lsm_free = lsm_free_plain,
	255	.lsm_destroy = lsm_destroy_plain,
	256	.lsm_stripe_by_index = lsm_stripe_by_index_plain,
	257	.lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
	258	.lsm_lmm_verify = lsm_lmm_verify_v1,
	259	.lsm_unpackmd = lsm_unpackmd_v1,
	260	};
	261
	262	static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
	263	__u16 *stripe_count)
	264	{
	265	struct lov_mds_md_v3 *lmm;
	266
	267	lmm = (struct lov_mds_md_v3 *)lmmv1;
	268
	269	if (lmm_bytes < sizeof(*lmm)) {
	270	CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
	271	lmm_bytes, (int)sizeof(*lmm));
	272	return -EINVAL;
	273	}
	274
	275	*stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
5dd16419 JX	276	if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
5dd16419 JX	277	*stripe_count = 0;
d7e09d03 PT	278
	279	if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
	280	CERROR("LOV EA V3 too small: %d, need %d\n",
	281	lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
53b78538	282	lov_dump_lmm_common(D_WARNING, lmm);
d7e09d03 PT	283	return -EINVAL;
	284	}
	285
	286	return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
	287	*stripe_count);
	288	}
	289
	290	int lsm_unpackmd_v3(struct lov_obd lov, struct lov_stripe_md lsm,
	291	struct lov_mds_md *lmmv1)
	292	{
	293	struct lov_mds_md_v3 *lmm;
	294	struct lov_oinfo *loi;
	295	int i;
5dd16419	296	int stripe_count;
d7e09d03 PT	297	__u64 stripe_maxbytes = OBD_OBJECT_EOF;
	298	int cplen = 0;
	299
	300	lmm = (struct lov_mds_md_v3 *)lmmv1;
	301
	302	lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
5dd16419 JX	303
	304	stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
	305
d7e09d03 PT	306	cplen = strlcpy(lsm->lsm_pool_name, lmm->lmm_pool_name,
	307	sizeof(lsm->lsm_pool_name));
	308	if (cplen >= sizeof(lsm->lsm_pool_name))
	309	return -E2BIG;
	310
5dd16419	311	for (i = 0; i < stripe_count; i++) {
d7e09d03 PT	312	/* XXX LOV STACKING call down to osc_unpackmd() */
	313	loi = lsm->lsm_oinfo[i];
	314	ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
	315	loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
	316	loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
	317	if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
	318	CERROR("OST index %d more than OST count %d\n",
	319	loi->loi_ost_idx, lov->desc.ld_tgt_count);
	320	lov_dump_lmm_v3(D_WARNING, lmm);
	321	return -EINVAL;
	322	}
	323	if (!lov->lov_tgts[loi->loi_ost_idx]) {
	324	CERROR("OST index %d missing\n", loi->loi_ost_idx);
	325	lov_dump_lmm_v3(D_WARNING, lmm);
	326	return -EINVAL;
	327	}
	328	/* calculate the minimum stripe max bytes */
	329	lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
	330	&stripe_maxbytes);
	331	}
	332
	333	lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
5dd16419 JX	334	if (lsm->lsm_stripe_count == 0)
5dd16419 JX	335	lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
d7e09d03 PT	336
	337	return 0;
	338	}
	339
	340	const struct lsm_operations lsm_v3_ops = {
	341	.lsm_free = lsm_free_plain,
	342	.lsm_destroy = lsm_destroy_plain,
	343	.lsm_stripe_by_index = lsm_stripe_by_index_plain,
	344	.lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
	345	.lsm_lmm_verify = lsm_lmm_verify_v3,
	346	.lsm_unpackmd = lsm_unpackmd_v3,
	347	};
081b7265 JH	348
	349	void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
	350	{
2d00bd17 JP	351	CDEBUG(level, "lsm %p, objid " DOSTID ", maxbytes %#llx, magic 0x%08X, stripe_size %u, stripe_count %u, refc: %d, layout_gen %u, pool [" LOV_POOLNAMEF "]\n",
2d00bd17 JP	352	lsm,
081b7265 JH	353	POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
	354	lsm->lsm_stripe_size, lsm->lsm_stripe_count,
	355	atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen,
	356	lsm->lsm_pool_name);
	357	}