1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * slotmap.h 5 * 6 * description here 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 27 #ifndef SLOTMAP_H 28 #define SLOTMAP_H 29 30 struct ocfs2_slot_info { 31 spinlock_t si_lock; 32 33 struct inode *si_inode; 34 struct buffer_head *si_bh; 35 unsigned int si_num_slots; 36 unsigned int si_size; 37 s16 si_global_node_nums[OCFS2_MAX_SLOTS]; 38 }; 39 40 int ocfs2_init_slot_info(struct ocfs2_super *osb); 41 void ocfs2_free_slot_info(struct ocfs2_slot_info *si); 42 43 int ocfs2_find_slot(struct ocfs2_super *osb); 44 void ocfs2_put_slot(struct ocfs2_super *osb); 45 46 void ocfs2_update_slot_info(struct ocfs2_slot_info *si); 47 int ocfs2_update_disk_slots(struct ocfs2_super *osb, 48 struct ocfs2_slot_info *si); 49 50 s16 ocfs2_node_num_to_slot(struct ocfs2_slot_info *si, 51 s16 global); 52 void ocfs2_clear_slot(struct ocfs2_slot_info *si, 53 s16 slot_num); 54 55 static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si, 56 int slot_num) 57 { 58 BUG_ON(slot_num == OCFS2_INVALID_SLOT); 59 assert_spin_locked(&si->si_lock); 60 61 return si->si_global_node_nums[slot_num] == OCFS2_INVALID_SLOT; 62 } 63 64 #endif 65