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 #define OCFS2_ORPHAN_LVB_VERSION 1
67 struct ocfs2_orphan_scan_lvb {
73 #define OCFS2_TRIMFS_LVB_VERSION 1
75 struct ocfs2_trim_fs_lvb {
86 struct ocfs2_trim_fs_info {
87 u8 tf_valid; /* lvb is valid, or not */
88 u8 tf_success; /* trim is successful, or not */
89 u32 tf_nodenum; /* osb node number */
90 u64 tf_start; /* trim start offset in clusters */
91 u64 tf_len; /* trim end offset in clusters */
92 u64 tf_minlen; /* trim minimum contiguous free clusters */
93 u64 tf_trimlen; /* trimmed length in bytes */
96 struct ocfs2_lock_holder {
97 struct list_head oh_list;
98 struct pid *oh_owner_pid;
101 /* ocfs2_inode_lock_full() 'arg_flags' flags */
102 /* don't wait on recovery. */
103 #define OCFS2_META_LOCK_RECOVERY (0x01)
104 /* Instruct the dlm not to queue ourselves on the other node. */
105 #define OCFS2_META_LOCK_NOQUEUE (0x02)
106 /* don't block waiting for the downconvert thread, instead return -EAGAIN */
107 #define OCFS2_LOCK_NONBLOCK (0x04)
108 /* just get back disk inode bh if we've got cluster lock. */
109 #define OCFS2_META_LOCK_GETBH (0x08)
111 /* Locking subclasses of inode cluster lock */
117 OI_LS_REFLINK_TARGET,
120 int ocfs2_dlm_init(struct ocfs2_super *osb);
121 void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
122 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
123 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
124 enum ocfs2_lock_type type,
125 unsigned int generation,
126 struct inode *inode);
127 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
128 u64 parent, struct inode *inode);
129 struct ocfs2_file_private;
130 void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
131 struct ocfs2_file_private *fp);
132 struct ocfs2_mem_dqinfo;
133 void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres,
134 struct ocfs2_mem_dqinfo *info);
135 void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres,
136 struct ocfs2_super *osb, u64 ref_blkno,
137 unsigned int generation);
138 void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
139 int ocfs2_create_new_inode_locks(struct inode *inode);
140 int ocfs2_drop_inode_locks(struct inode *inode);
141 int ocfs2_rw_lock(struct inode *inode, int write);
142 int ocfs2_try_rw_lock(struct inode *inode, int write);
143 void ocfs2_rw_unlock(struct inode *inode, int write);
144 int ocfs2_open_lock(struct inode *inode);
145 int ocfs2_try_open_lock(struct inode *inode, int write);
146 void ocfs2_open_unlock(struct inode *inode);
147 int ocfs2_inode_lock_atime(struct inode *inode,
148 struct vfsmount *vfsmnt,
149 int *level, int wait);
150 int ocfs2_inode_lock_full_nested(struct inode *inode,
151 struct buffer_head **ret_bh,
155 int ocfs2_inode_lock_with_page(struct inode *inode,
156 struct buffer_head **ret_bh,
159 /* Variants without special locking class or flags */
160 #define ocfs2_inode_lock_full(i, r, e, f)\
161 ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL)
162 #define ocfs2_inode_lock_nested(i, b, e, s)\
163 ocfs2_inode_lock_full_nested(i, b, e, 0, s)
164 /* 99% of the time we don't want to supply any additional flags --
165 * those are for very specific cases only. */
166 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL)
167 #define ocfs2_try_inode_lock(i, b, e)\
168 ocfs2_inode_lock_full_nested(i, b, e, OCFS2_META_LOCK_NOQUEUE,\
170 void ocfs2_inode_unlock(struct inode *inode,
172 int ocfs2_super_lock(struct ocfs2_super *osb,
174 void ocfs2_super_unlock(struct ocfs2_super *osb,
176 int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno);
177 void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno);
179 int ocfs2_rename_lock(struct ocfs2_super *osb);
180 void ocfs2_rename_unlock(struct ocfs2_super *osb);
181 int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
182 void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
183 void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb);
184 void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb);
185 int ocfs2_trim_fs_lock(struct ocfs2_super *osb,
186 struct ocfs2_trim_fs_info *info, int trylock);
187 void ocfs2_trim_fs_unlock(struct ocfs2_super *osb,
188 struct ocfs2_trim_fs_info *info);
189 int ocfs2_dentry_lock(struct dentry *dentry, int ex);
190 void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
191 int ocfs2_file_lock(struct file *file, int ex, int trylock);
192 void ocfs2_file_unlock(struct file *file);
193 int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex);
194 void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex);
195 struct ocfs2_refcount_tree;
196 int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex);
197 void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex);
200 void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb,
201 struct ocfs2_lock_res *lockres);
202 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
203 struct ocfs2_lock_res *lockres);
205 /* for the downconvert thread */
206 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
208 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
209 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
211 /* To set the locking protocol on module initialization */
212 void ocfs2_set_locking_protocol(void);
214 /* The _tracker pair is used to avoid cluster recursive locking */
215 int ocfs2_inode_lock_tracker(struct inode *inode,
216 struct buffer_head **ret_bh,
218 struct ocfs2_lock_holder *oh);
219 void ocfs2_inode_unlock_tracker(struct inode *inode,
221 struct ocfs2_lock_holder *oh,
224 #endif /* DLMGLUE_H */