ia64/linux-2.6.18-xen.hg

view fs/ocfs2/dlmglue.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 * dlmglue.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 DLMGLUE_H
28 #define DLMGLUE_H
30 #define OCFS2_LVB_VERSION 2
32 struct ocfs2_meta_lvb {
33 __be32 lvb_version;
34 __be32 lvb_iclusters;
35 __be32 lvb_iuid;
36 __be32 lvb_igid;
37 __be64 lvb_iatime_packed;
38 __be64 lvb_ictime_packed;
39 __be64 lvb_imtime_packed;
40 __be64 lvb_isize;
41 __be16 lvb_imode;
42 __be16 lvb_inlink;
43 __be32 lvb_reserved[3];
44 };
46 /* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */
47 /* don't wait on recovery. */
48 #define OCFS2_META_LOCK_RECOVERY (0x01)
49 /* Instruct the dlm not to queue ourselves on the other node. */
50 #define OCFS2_META_LOCK_NOQUEUE (0x02)
51 /* don't block waiting for the vote thread, instead return -EAGAIN */
52 #define OCFS2_LOCK_NONBLOCK (0x04)
54 int ocfs2_dlm_init(struct ocfs2_super *osb);
55 void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
56 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
57 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
58 enum ocfs2_lock_type type,
59 struct inode *inode);
60 void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
61 int ocfs2_create_new_inode_locks(struct inode *inode);
62 int ocfs2_drop_inode_locks(struct inode *inode);
63 int ocfs2_data_lock_full(struct inode *inode,
64 int write,
65 int arg_flags);
66 #define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0)
67 int ocfs2_data_lock_with_page(struct inode *inode,
68 int write,
69 struct page *page);
70 void ocfs2_data_unlock(struct inode *inode,
71 int write);
72 int ocfs2_rw_lock(struct inode *inode, int write);
73 void ocfs2_rw_unlock(struct inode *inode, int write);
74 int ocfs2_meta_lock_full(struct inode *inode,
75 struct ocfs2_journal_handle *handle,
76 struct buffer_head **ret_bh,
77 int ex,
78 int arg_flags);
79 int ocfs2_meta_lock_with_page(struct inode *inode,
80 struct ocfs2_journal_handle *handle,
81 struct buffer_head **ret_bh,
82 int ex,
83 struct page *page);
84 /* 99% of the time we don't want to supply any additional flags --
85 * those are for very specific cases only. */
86 #define ocfs2_meta_lock(i, h, b, e) ocfs2_meta_lock_full(i, h, b, e, 0)
87 void ocfs2_meta_unlock(struct inode *inode,
88 int ex);
89 int ocfs2_super_lock(struct ocfs2_super *osb,
90 int ex);
91 void ocfs2_super_unlock(struct ocfs2_super *osb,
92 int ex);
93 int ocfs2_rename_lock(struct ocfs2_super *osb);
94 void ocfs2_rename_unlock(struct ocfs2_super *osb);
95 void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
97 /* for the vote thread */
98 void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
99 struct ocfs2_lock_res *lockres);
101 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
102 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
104 /* aids in debugging and tracking lvbs */
105 void ocfs2_dump_meta_lvb_info(u64 level,
106 const char *function,
107 unsigned int line,
108 struct ocfs2_lock_res *lockres);
109 #define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres)
111 #endif /* DLMGLUE_H */