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/* -*- mode: c; c-basic-offset: 8; -*-

 * vim: noexpandtab sw=8 ts=8 sts=0:

 *

 * slotmap.h

 *

 * description here

 *

 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * 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 for more details.

 *

 * You should have received a copy of the GNU General Public

 * License along with this program; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 021110-1307, USA.

 */

#ifndef SLOTMAP_H

#define SLOTMAP_H

struct ocfs2_slot_info {

        spinlock_t si_lock;

        struct inode *si_inode;

        struct buffer_head *si_bh;

        unsigned int si_num_slots;

        unsigned int si_size;

        s16 si_global_node_nums[OCFS2_MAX_SLOTS];

};

int ocfs2_init_slot_info(struct ocfs2_super *osb);

void ocfs2_free_slot_info(struct ocfs2_slot_info *si);

int ocfs2_find_slot(struct ocfs2_super *osb);

void ocfs2_put_slot(struct ocfs2_super *osb);

void ocfs2_update_slot_info(struct ocfs2_slot_info *si);

int ocfs2_update_disk_slots(struct ocfs2_super *osb,

                            struct ocfs2_slot_info *si);

s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,

                           s16 global);

void ocfs2_clear_slot(struct ocfs2_slot_info *si,

                      s16 slot_num);

void ocfs2_populate_mounted_map(struct ocfs2_super *osb);

static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si,

                                      int slot_num)

{

        BUG_ON(slot_num == OCFS2_INVALID_SLOT);

        assert_spin_locked(&si->si_lock);

        return si->si_global_node_nums[slot_num] == OCFS2_INVALID_SLOT;

}

#endif