1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
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.
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.
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.
32 #define OCFS2_LVB_VERSION 5
34 struct ocfs2_meta_lvb {
37 __be16 lvb_idynfeatures;
41 __be64 lvb_iatime_packed;
42 __be64 lvb_ictime_packed;
43 __be64 lvb_imtime_packed;
48 __be32 lvb_igeneration;
52 #define OCFS2_QINFO_LVB_VERSION 1
54 struct ocfs2_qinfo_lvb {
62 __be32 lvb_free_entry;
65 /* ocfs2_inode_lock_full() 'arg_flags' flags */
66 /* don't wait on recovery. */
67 #define OCFS2_META_LOCK_RECOVERY (0x01)
68 /* Instruct the dlm not to queue ourselves on the other node. */
69 #define OCFS2_META_LOCK_NOQUEUE (0x02)
70 /* don't block waiting for the downconvert thread, instead return -EAGAIN */
71 #define OCFS2_LOCK_NONBLOCK (0x04)
73 int ocfs2_dlm_init(struct ocfs2_super *osb);
74 void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
75 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
76 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
77 enum ocfs2_lock_type type,
78 unsigned int generation,
80 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
81 u64 parent, struct inode *inode);
82 struct ocfs2_file_private;
83 void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
84 struct ocfs2_file_private *fp);
85 struct ocfs2_mem_dqinfo;
86 void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres,
87 struct ocfs2_mem_dqinfo *info);
88 void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
89 int ocfs2_create_new_inode_locks(struct inode *inode);
90 int ocfs2_drop_inode_locks(struct inode *inode);
91 int ocfs2_rw_lock(struct inode *inode, int write);
92 void ocfs2_rw_unlock(struct inode *inode, int write);
93 int ocfs2_open_lock(struct inode *inode);
94 int ocfs2_try_open_lock(struct inode *inode, int write);
95 void ocfs2_open_unlock(struct inode *inode);
96 int ocfs2_inode_lock_atime(struct inode *inode,
97 struct vfsmount *vfsmnt,
99 int ocfs2_inode_lock_full(struct inode *inode,
100 struct buffer_head **ret_bh,
103 int ocfs2_inode_lock_with_page(struct inode *inode,
104 struct buffer_head **ret_bh,
107 /* 99% of the time we don't want to supply any additional flags --
108 * those are for very specific cases only. */
109 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full(i, b, e, 0)
110 void ocfs2_inode_unlock(struct inode *inode,
112 int ocfs2_super_lock(struct ocfs2_super *osb,
114 void ocfs2_super_unlock(struct ocfs2_super *osb,
116 int ocfs2_rename_lock(struct ocfs2_super *osb);
117 void ocfs2_rename_unlock(struct ocfs2_super *osb);
118 int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
119 void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
120 int ocfs2_dentry_lock(struct dentry *dentry, int ex);
121 void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
122 int ocfs2_file_lock(struct file *file, int ex, int trylock);
123 void ocfs2_file_unlock(struct file *file);
124 int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex);
125 void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex);
128 void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
129 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
130 struct ocfs2_lock_res *lockres);
132 /* for the downconvert thread */
133 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
135 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
136 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
138 /* To set the locking protocol on module initialization */
139 void ocfs2_set_locking_protocol(void);
140 #endif /* DLMGLUE_H */