projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ccd979bd MF |
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 | ||
| ccd979bd MF |
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 |