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* 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.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#ifndef _LMV_INTERNAL_H_
#define _LMV_INTERNAL_H_
#include "../include/lustre/lustre_idl.h"
#include "../include/obd.h"
#include "../include/lustre_lmv.h"
#define LMV_MAX_TGT_COUNT 128
#define LL_IT2STR(it) \
((it) ? ldlm_it2str((it)->it_op) : "0")
int lmv_check_connect(struct obd_device *obd);
int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
struct lookup_intent *it, struct ptlrpc_request **reqp,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags);
int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds);
int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
struct lu_fid *fid, struct md_op_data *op_data);
int lmv_unpack_md(struct obd_export *exp, struct lmv_stripe_md **lsmp,
const union lmv_mds_md *lmm, int stripe_count);
int lmv_revalidate_slaves(struct obd_export *exp,
const struct lmv_stripe_md *lsm,
ldlm_blocking_callback cb_blocking,
int extra_lock_flags);
static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
{
return container_of0(lmv, struct obd_device, u.lmv);
}
static inline struct lmv_tgt_desc *
lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
{
int i;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (!lmv->tgts[i])
continue;
if (lmv->tgts[i]->ltd_idx == mdt_idx) {
if (index)
*index = i;
return lmv->tgts[i];
}
}
return ERR_PTR(-ENODEV);
}
static inline int
lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
{
struct lmv_tgt_desc *ltd;
u32 mdt_idx = 0;
int index = 0;
if (lmv->desc.ld_tgt_count > 1) {
int rc;
rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
if (rc < 0)
return rc;
}
ltd = lmv_get_target(lmv, mdt_idx, &index);
if (IS_ERR(ltd))
return PTR_ERR(ltd);
return index;
}
static inline struct lmv_tgt_desc *
lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
{
int index;
index = lmv_find_target_index(lmv, fid);
if (index < 0)
return ERR_PTR(index);
return lmv->tgts[index];
}
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]);
}
int lmv_name_to_stripe_index(enum lmv_hash_type hashtype,
unsigned int max_mdt_index,
const char *name, int namelen);
static inline const struct lmv_oinfo *
lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
int namelen)
{
int stripe_index;
stripe_index = lmv_name_to_stripe_index(lsm->lsm_md_hash_type,
lsm->lsm_md_stripe_count,
name, namelen);
if (stripe_index < 0)
return ERR_PTR(stripe_index);
LASSERTF(stripe_index < lsm->lsm_md_stripe_count,
"stripe_index = %d, stripe_count = %d hash_type = %x name = %.*s\n",
stripe_index, lsm->lsm_md_stripe_count,
lsm->lsm_md_hash_type, namelen, name);
return &lsm->lsm_md_oinfo[stripe_index];
}
static inline bool lmv_need_try_all_stripes(const struct lmv_stripe_md *lsm)
{
return !lmv_is_known_hash_type(lsm->lsm_md_hash_type) ||
lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION;
}
struct lmv_tgt_desc
*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
struct lu_fid *fid);
/* lproc_lmv.c */
void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars);
extern const struct file_operations lmv_proc_target_fops;
#endif
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