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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 | */ | |
25 | ||
26 | ||
27 | #ifndef DLMGLUE_H | |
28 | #define DLMGLUE_H | |
29 | ||
30 | #define OCFS2_LVB_VERSION 2 | |
31 | ||
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 | }; | |
45 | ||
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) | |
53 | ||
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); | |
96 | ||
97 | /* for the vote thread */ | |
98 | void ocfs2_process_blocked_lock(struct ocfs2_super *osb, | |
99 | struct ocfs2_lock_res *lockres); | |
100 | ||
101 | struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); | |
102 | void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); | |
103 | ||
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) | |
110 | ||
111 | #endif /* DLMGLUE_H */ |