ia64/linux-2.6.18-xen.hg

view fs/ocfs2/slot_map.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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 */
27 #ifndef SLOTMAP_H
28 #define SLOTMAP_H
30 struct ocfs2_slot_info {
31 spinlock_t si_lock;
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 };
40 int ocfs2_init_slot_info(struct ocfs2_super *osb);
41 void ocfs2_free_slot_info(struct ocfs2_slot_info *si);
43 int ocfs2_find_slot(struct ocfs2_super *osb);
44 void ocfs2_put_slot(struct ocfs2_super *osb);
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);
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);
55 void ocfs2_populate_mounted_map(struct ocfs2_super *osb);
57 static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si,
58 int slot_num)
59 {
60 BUG_ON(slot_num == OCFS2_INVALID_SLOT);
61 assert_spin_locked(&si->si_lock);
63 return si->si_global_node_nums[slot_num] == OCFS2_INVALID_SLOT;
64 }
66 #endif