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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.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) 2004, 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.
*/
#ifndef _LMV_INTERNAL_H_
#define _LMV_INTERNAL_H_
#include "../include/lustre/lustre_idl.h"
#include "../include/obd.h"
#define LMV_MAX_TGT_COUNT 128
#define lmv_init_lock(lmv) mutex_lock(&lmv->init_mutex)
#define lmv_init_unlock(lmv) mutex_unlock(&lmv->init_mutex)
#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,
void *lmm, int lmmsize, struct lookup_intent *it,
int flags, struct ptlrpc_request **reqp,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags);
int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
void *lmm, int lmmsize, struct lookup_intent *it,
int flags, struct ptlrpc_request **reqp,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags);
int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
void *lmm, int lmmsize, struct lookup_intent *it,
int flags, struct ptlrpc_request **reqp,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags);
int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
void *, int);
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(struct obd_export *exp, struct lu_fid *fid,
struct md_op_data *op_data);
static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
{
struct mdt_body *body;
struct lmv_stripe_md *mea;
LASSERT(req != NULL);
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
if (!body || !S_ISDIR(body->mode) || !body->eadatasize)
return NULL;
mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
body->eadatasize);
LASSERT(mea != NULL);
if (mea->mea_count == 0)
return NULL;
if (mea->mea_magic != MEA_MAGIC_LAST_CHAR &&
mea->mea_magic != MEA_MAGIC_ALL_CHARS &&
mea->mea_magic != MEA_MAGIC_HASH_SEGMENT)
return NULL;
return mea;
}
static inline int lmv_get_easize(struct lmv_obd *lmv)
{
return sizeof(struct lmv_stripe_md) +
lmv->desc.ld_tgt_count *
sizeof(struct lu_fid);
}
static inline struct lmv_tgt_desc *
lmv_get_target(struct lmv_obd *lmv, u32 mds)
{
int count = lmv->desc.ld_tgt_count;
int i;
for (i = 0; i < count; i++) {
if (lmv->tgts[i] == NULL)
continue;
if (lmv->tgts[i]->ltd_idx == mds)
return lmv->tgts[i];
}
return ERR_PTR(-ENODEV);
}
static inline struct lmv_tgt_desc *
lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
{
u32 mds = 0;
int rc;
if (lmv->desc.ld_tgt_count > 1) {
rc = lmv_fld_lookup(lmv, fid, &mds);
if (rc)
return ERR_PTR(rc);
}
return lmv_get_target(lmv, mds);
}
struct lmv_tgt_desc
*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
struct lu_fid *fid);
/* lproc_lmv.c */
#if defined(CONFIG_PROC_FS)
void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars);
#else
static inline void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars)
{
memset(lvars, 0, sizeof(*lvars));
}
#endif
extern struct file_operations lmv_proc_target_fops;
#endif
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