/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/mdc/mdc_internal.h
 *
 * MDC internal definitions.
 */

#include <lustre_mds.h>
#ifdef LPROCFS
void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars);
#else
static inline void lprocfs_mdc_init_vars(struct lprocfs_static_vars *lvars)
{
        memset(lvars, 0, sizeof(*lvars));
}
#endif
void mdc_pack_req_body(struct ptlrpc_request *req, int offset,
                       __u64 valid, struct ll_fid *fid, int ea_size, int flags);
void mdc_pack_rep_body(struct ptlrpc_request *);
void mdc_readdir_pack(struct ptlrpc_request *req, int offset, __u64 pg_off,
		      __u32 size, struct ll_fid *mdc_fid);
void mdc_getattr_pack(struct ptlrpc_request *req, int offset, __u64 valid,
                      int flags, struct mdc_op_data *data, int ea_size);
void mdc_setattr_pack(struct ptlrpc_request *req, int offset,
                      struct mdc_op_data *data,
                      struct iattr *iattr, void *ea, int ealen,
                      void *ea2, int ea2len);
void mdc_create_pack(struct ptlrpc_request *req, int offset,
                     struct mdc_op_data *op_data, const void *data, int datalen,
                     __u32 mode, __u32 uid, __u32 gid, cfs_cap_t cap_effective,
                     __u64 rdev);
void mdc_open_pack(struct ptlrpc_request *req, int offset,
                   struct mdc_op_data *op_data, __u32 mode, __u64 rdev,
                   __u32 flags, const void *data, int datalen);
void mdc_join_pack(struct ptlrpc_request *req, int offset,
                   struct mdc_op_data *op_data, __u64 head_size);
void mdc_unlink_pack(struct ptlrpc_request *req, int offset,
                     struct mdc_op_data *data);
void mdc_link_pack(struct ptlrpc_request *req, int offset,
                   struct mdc_op_data *data);
void mdc_rename_pack(struct ptlrpc_request *req, int offset,
                     struct mdc_op_data *data,
                     const char *old, int oldlen, const char *new, int newlen);
void mdc_close_pack(struct ptlrpc_request *req, int offset,
                    struct mdc_op_data *data,
                    struct obdo *oa,
                    __u64 valid, struct obd_client_handle *och);
void mdc_exit_request(struct client_obd *cli);
int mdc_enter_request(struct client_obd *cli);

int seq_client_init(struct lu_client_seq *seq,
                    struct obd_export *exp,
                    enum lu_cli_type type,
                    __u64 width,
                    const char *prefix);

void seq_client_fini(struct lu_client_seq *seq);

int mdc_fid_alloc(struct lu_client_seq *seq, struct lu_fid *fid);

void seq_client_flush(struct lu_client_seq *seq);

struct mdc_open_data {
        struct obd_client_handle *mod_och;
        struct ptlrpc_request    *mod_open_req;
        struct ptlrpc_request    *mod_close_req;
};

struct mdc_rpc_lock {
        struct semaphore rpcl_sem;
        struct lookup_intent *rpcl_it;
};

static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
{
        sema_init(&lck->rpcl_sem, 1);
        lck->rpcl_it = NULL;
}

static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
                                    struct lookup_intent *it)
{
        ENTRY;
        if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
                down(&lck->rpcl_sem);
                LASSERT(lck->rpcl_it == NULL);
                lck->rpcl_it = it;
        }
}

static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
                                    struct lookup_intent *it)
{
        if (!it || (it->it_op != IT_GETATTR && it->it_op != IT_LOOKUP)) {
                LASSERT(it == lck->rpcl_it);
                lck->rpcl_it = NULL;
                up(&lck->rpcl_sem);
        }
        EXIT;
}

static inline int mdc_exp_is_2_0_server(struct obd_export *exp) {
       LASSERT(exp);
       return !!(exp->exp_connect_flags & OBD_CONNECT_FID);
}

static inline int mdc_req_is_2_0_server(struct ptlrpc_request *req) {
       LASSERT(req);
       return mdc_exp_is_2_0_server(req->rq_export);
}

static inline void mdc_update_max_ea_from_body(struct obd_export *exp,
                                               struct mds_body *body)
{
        if (body->valid & OBD_MD_FLMODEASIZE) {
                if (exp->exp_obd->u.cli.cl_max_mds_easize < body->max_mdsize) 
                        exp->exp_obd->u.cli.cl_max_mds_easize = 
                                                body->max_mdsize;
                if (exp->exp_obd->u.cli.cl_max_mds_cookiesize < 
                                                body->max_cookiesize)
                        exp->exp_obd->u.cli.cl_max_mds_cookiesize = 
                                                body->max_cookiesize;
        }
}