forked from Minki/linux
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
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/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* slotmap.h
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*
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* description here
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef SLOTMAP_H
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#define SLOTMAP_H
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struct ocfs2_slot_info {
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spinlock_t si_lock;
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struct inode *si_inode;
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struct buffer_head *si_bh;
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unsigned int si_num_slots;
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unsigned int si_size;
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s16 si_global_node_nums[OCFS2_MAX_SLOTS];
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};
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int ocfs2_init_slot_info(struct ocfs2_super *osb);
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void ocfs2_free_slot_info(struct ocfs2_slot_info *si);
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int ocfs2_find_slot(struct ocfs2_super *osb);
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void ocfs2_put_slot(struct ocfs2_super *osb);
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void ocfs2_update_slot_info(struct ocfs2_slot_info *si);
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int ocfs2_update_disk_slots(struct ocfs2_super *osb,
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struct ocfs2_slot_info *si);
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s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
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s16 global);
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void ocfs2_clear_slot(struct ocfs2_slot_info *si,
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s16 slot_num);
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static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si,
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int slot_num)
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{
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BUG_ON(slot_num == OCFS2_INVALID_SLOT);
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assert_spin_locked(&si->si_lock);
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return si->si_global_node_nums[slot_num] == OCFS2_INVALID_SLOT;
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}
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#endif
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