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ccd979bd MF |
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 | ||
d680efe9 MF |
30 | #include "dcache.h" |
31 | ||
15b1e36b | 32 | #define OCFS2_LVB_VERSION 5 |
ccd979bd MF |
33 | |
34 | struct ocfs2_meta_lvb { | |
4d3b83f7 | 35 | __u8 lvb_version; |
24c19ef4 | 36 | __u8 lvb_reserved0; |
15b1e36b | 37 | __be16 lvb_idynfeatures; |
ccd979bd MF |
38 | __be32 lvb_iclusters; |
39 | __be32 lvb_iuid; | |
40 | __be32 lvb_igid; | |
41 | __be64 lvb_iatime_packed; | |
42 | __be64 lvb_ictime_packed; | |
43 | __be64 lvb_imtime_packed; | |
44 | __be64 lvb_isize; | |
45 | __be16 lvb_imode; | |
46 | __be16 lvb_inlink; | |
ca4d147e | 47 | __be32 lvb_iattr; |
f9e2d82e MF |
48 | __be32 lvb_igeneration; |
49 | __be32 lvb_reserved2; | |
ccd979bd MF |
50 | }; |
51 | ||
9e33d69f JK |
52 | #define OCFS2_QINFO_LVB_VERSION 1 |
53 | ||
54 | struct ocfs2_qinfo_lvb { | |
55 | __u8 lvb_version; | |
56 | __u8 lvb_reserved[3]; | |
57 | __be32 lvb_bgrace; | |
58 | __be32 lvb_igrace; | |
59 | __be32 lvb_syncms; | |
60 | __be32 lvb_blocks; | |
61 | __be32 lvb_free_blk; | |
62 | __be32 lvb_free_entry; | |
63 | }; | |
64 | ||
83273932 SE |
65 | #define OCFS2_ORPHAN_LVB_VERSION 1 |
66 | ||
67 | struct ocfs2_orphan_scan_lvb { | |
68 | __u8 lvb_version; | |
69 | __u8 lvb_reserved[3]; | |
70 | __be32 lvb_os_seqno; | |
71 | }; | |
72 | ||
439a36b8 ER |
73 | struct ocfs2_lock_holder { |
74 | struct list_head oh_list; | |
75 | struct pid *oh_owner_pid; | |
76 | }; | |
77 | ||
e63aecb6 | 78 | /* ocfs2_inode_lock_full() 'arg_flags' flags */ |
ccd979bd MF |
79 | /* don't wait on recovery. */ |
80 | #define OCFS2_META_LOCK_RECOVERY (0x01) | |
81 | /* Instruct the dlm not to queue ourselves on the other node. */ | |
82 | #define OCFS2_META_LOCK_NOQUEUE (0x02) | |
34d024f8 | 83 | /* don't block waiting for the downconvert thread, instead return -EAGAIN */ |
ccd979bd | 84 | #define OCFS2_LOCK_NONBLOCK (0x04) |
439a36b8 ER |
85 | /* just get back disk inode bh if we've got cluster lock. */ |
86 | #define OCFS2_META_LOCK_GETBH (0x08) | |
ccd979bd | 87 | |
cb25797d JK |
88 | /* Locking subclasses of inode cluster lock */ |
89 | enum { | |
90 | OI_LS_NORMAL = 0, | |
91 | OI_LS_PARENT, | |
92 | OI_LS_RENAME1, | |
93 | OI_LS_RENAME2, | |
07eaac94 | 94 | OI_LS_REFLINK_TARGET, |
cb25797d JK |
95 | }; |
96 | ||
ccd979bd | 97 | int ocfs2_dlm_init(struct ocfs2_super *osb); |
286eaa95 | 98 | void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending); |
ccd979bd MF |
99 | void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); |
100 | void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, | |
101 | enum ocfs2_lock_type type, | |
24c19ef4 | 102 | unsigned int generation, |
ccd979bd | 103 | struct inode *inode); |
d680efe9 MF |
104 | void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, |
105 | u64 parent, struct inode *inode); | |
cf8e06f1 MF |
106 | struct ocfs2_file_private; |
107 | void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, | |
108 | struct ocfs2_file_private *fp); | |
9e33d69f JK |
109 | struct ocfs2_mem_dqinfo; |
110 | void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, | |
111 | struct ocfs2_mem_dqinfo *info); | |
8dec98ed TM |
112 | void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres, |
113 | struct ocfs2_super *osb, u64 ref_blkno, | |
114 | unsigned int generation); | |
ccd979bd MF |
115 | void ocfs2_lock_res_free(struct ocfs2_lock_res *res); |
116 | int ocfs2_create_new_inode_locks(struct inode *inode); | |
117 | int ocfs2_drop_inode_locks(struct inode *inode); | |
ccd979bd MF |
118 | int ocfs2_rw_lock(struct inode *inode, int write); |
119 | void ocfs2_rw_unlock(struct inode *inode, int write); | |
50008630 TY |
120 | int ocfs2_open_lock(struct inode *inode); |
121 | int ocfs2_try_open_lock(struct inode *inode, int write); | |
122 | void ocfs2_open_unlock(struct inode *inode); | |
e63aecb6 | 123 | int ocfs2_inode_lock_atime(struct inode *inode, |
7f1a37e3 TY |
124 | struct vfsmount *vfsmnt, |
125 | int *level); | |
cb25797d | 126 | int ocfs2_inode_lock_full_nested(struct inode *inode, |
ccd979bd MF |
127 | struct buffer_head **ret_bh, |
128 | int ex, | |
cb25797d JK |
129 | int arg_flags, |
130 | int subclass); | |
e63aecb6 | 131 | int ocfs2_inode_lock_with_page(struct inode *inode, |
ccd979bd MF |
132 | struct buffer_head **ret_bh, |
133 | int ex, | |
134 | struct page *page); | |
cb25797d JK |
135 | /* Variants without special locking class or flags */ |
136 | #define ocfs2_inode_lock_full(i, r, e, f)\ | |
137 | ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL) | |
138 | #define ocfs2_inode_lock_nested(i, b, e, s)\ | |
139 | ocfs2_inode_lock_full_nested(i, b, e, 0, s) | |
ccd979bd MF |
140 | /* 99% of the time we don't want to supply any additional flags -- |
141 | * those are for very specific cases only. */ | |
cb25797d | 142 | #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL) |
e63aecb6 | 143 | void ocfs2_inode_unlock(struct inode *inode, |
ccd979bd MF |
144 | int ex); |
145 | int ocfs2_super_lock(struct ocfs2_super *osb, | |
146 | int ex); | |
147 | void ocfs2_super_unlock(struct ocfs2_super *osb, | |
148 | int ex); | |
df152c24 SM |
149 | int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno); |
150 | void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno); | |
83273932 | 151 | |
ccd979bd MF |
152 | int ocfs2_rename_lock(struct ocfs2_super *osb); |
153 | void ocfs2_rename_unlock(struct ocfs2_super *osb); | |
6ca497a8 | 154 | int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex); |
155 | void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex); | |
d680efe9 MF |
156 | int ocfs2_dentry_lock(struct dentry *dentry, int ex); |
157 | void ocfs2_dentry_unlock(struct dentry *dentry, int ex); | |
cf8e06f1 MF |
158 | int ocfs2_file_lock(struct file *file, int ex, int trylock); |
159 | void ocfs2_file_unlock(struct file *file); | |
9e33d69f JK |
160 | int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex); |
161 | void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex); | |
8dec98ed TM |
162 | struct ocfs2_refcount_tree; |
163 | int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex); | |
164 | void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex); | |
9e33d69f | 165 | |
d680efe9 | 166 | |
84d86f83 JK |
167 | void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb, |
168 | struct ocfs2_lock_res *lockres); | |
d680efe9 MF |
169 | void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, |
170 | struct ocfs2_lock_res *lockres); | |
ccd979bd | 171 | |
34d024f8 | 172 | /* for the downconvert thread */ |
34d024f8 | 173 | void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); |
ccd979bd MF |
174 | |
175 | struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); | |
176 | void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); | |
177 | ||
63e0c48a JB |
178 | /* To set the locking protocol on module initialization */ |
179 | void ocfs2_set_locking_protocol(void); | |
439a36b8 ER |
180 | |
181 | /* The _tracker pair is used to avoid cluster recursive locking */ | |
182 | int ocfs2_inode_lock_tracker(struct inode *inode, | |
183 | struct buffer_head **ret_bh, | |
184 | int ex, | |
185 | struct ocfs2_lock_holder *oh); | |
186 | void ocfs2_inode_unlock_tracker(struct inode *inode, | |
187 | int ex, | |
188 | struct ocfs2_lock_holder *oh, | |
189 | int had_lock); | |
190 | ||
ccd979bd | 191 | #endif /* DLMGLUE_H */ |