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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
;
102 /* ocfs2_inode_lock_full() 'arg_flags' flags */
103 /* don't wait on recovery. */
104 #define OCFS2_META_LOCK_RECOVERY (0x01)
105 /* Instruct the dlm not to queue ourselves on the other node. */
106 #define OCFS2_META_LOCK_NOQUEUE (0x02)
107 /* don't block waiting for the downconvert thread, instead return -EAGAIN */
108 #define OCFS2_LOCK_NONBLOCK (0x04)
109 /* just get back disk inode bh if we've got cluster lock. */
110 #define OCFS2_META_LOCK_GETBH (0x08)
112 /* Locking subclasses of inode cluster lock */
118 OI_LS_REFLINK_TARGET
,
121 int ocfs2_dlm_init(struct ocfs2_super
*osb
);
122 void ocfs2_dlm_shutdown(struct ocfs2_super
*osb
, int hangup_pending
);
123 void ocfs2_lock_res_init_once(struct ocfs2_lock_res
*res
);
124 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res
*res
,
125 enum ocfs2_lock_type type
,
126 unsigned int generation
,
127 struct inode
*inode
);
128 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock
*dl
,
129 u64 parent
, struct inode
*inode
);
130 struct ocfs2_file_private
;
131 void ocfs2_file_lock_res_init(struct ocfs2_lock_res
*lockres
,
132 struct ocfs2_file_private
*fp
);
133 struct ocfs2_mem_dqinfo
;
134 void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res
*lockres
,
135 struct ocfs2_mem_dqinfo
*info
);
136 void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res
*lockres
,
137 struct ocfs2_super
*osb
, u64 ref_blkno
,
138 unsigned int generation
);
139 void ocfs2_lock_res_free(struct ocfs2_lock_res
*res
);
140 int ocfs2_create_new_inode_locks(struct inode
*inode
);
141 int ocfs2_drop_inode_locks(struct inode
*inode
);
142 int ocfs2_rw_lock(struct inode
*inode
, int write
);
143 int ocfs2_try_rw_lock(struct inode
*inode
, int write
);
144 void ocfs2_rw_unlock(struct inode
*inode
, int write
);
145 int ocfs2_open_lock(struct inode
*inode
);
146 int ocfs2_try_open_lock(struct inode
*inode
, int write
);
147 void ocfs2_open_unlock(struct inode
*inode
);
148 int ocfs2_inode_lock_atime(struct inode
*inode
,
149 struct vfsmount
*vfsmnt
,
150 int *level
, int wait
);
151 int ocfs2_inode_lock_full_nested(struct inode
*inode
,
152 struct buffer_head
**ret_bh
,
156 int ocfs2_inode_lock_with_page(struct inode
*inode
,
157 struct buffer_head
**ret_bh
,
160 /* Variants without special locking class or flags */
161 #define ocfs2_inode_lock_full(i, r, e, f)\
162 ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL)
163 #define ocfs2_inode_lock_nested(i, b, e, s)\
164 ocfs2_inode_lock_full_nested(i, b, e, 0, s)
165 /* 99% of the time we don't want to supply any additional flags --
166 * those are for very specific cases only. */
167 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL)
168 #define ocfs2_try_inode_lock(i, b, e)\
169 ocfs2_inode_lock_full_nested(i, b, e, OCFS2_META_LOCK_NOQUEUE,\
171 void ocfs2_inode_unlock(struct inode
*inode
,
173 int ocfs2_super_lock(struct ocfs2_super
*osb
,
175 void ocfs2_super_unlock(struct ocfs2_super
*osb
,
177 int ocfs2_orphan_scan_lock(struct ocfs2_super
*osb
, u32
*seqno
);
178 void ocfs2_orphan_scan_unlock(struct ocfs2_super
*osb
, u32 seqno
);
180 int ocfs2_rename_lock(struct ocfs2_super
*osb
);
181 void ocfs2_rename_unlock(struct ocfs2_super
*osb
);
182 int ocfs2_nfs_sync_lock(struct ocfs2_super
*osb
, int ex
);
183 void ocfs2_nfs_sync_unlock(struct ocfs2_super
*osb
, int ex
);
184 void ocfs2_trim_fs_lock_res_init(struct ocfs2_super
*osb
);
185 void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super
*osb
);
186 int ocfs2_trim_fs_lock(struct ocfs2_super
*osb
,
187 struct ocfs2_trim_fs_info
*info
, int trylock
);
188 void ocfs2_trim_fs_unlock(struct ocfs2_super
*osb
,
189 struct ocfs2_trim_fs_info
*info
);
190 int ocfs2_dentry_lock(struct dentry
*dentry
, int ex
);
191 void ocfs2_dentry_unlock(struct dentry
*dentry
, int ex
);
192 int ocfs2_file_lock(struct file
*file
, int ex
, int trylock
);
193 void ocfs2_file_unlock(struct file
*file
);
194 int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo
*oinfo
, int ex
);
195 void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo
*oinfo
, int ex
);
196 struct ocfs2_refcount_tree
;
197 int ocfs2_refcount_lock(struct ocfs2_refcount_tree
*ref_tree
, int ex
);
198 void ocfs2_refcount_unlock(struct ocfs2_refcount_tree
*ref_tree
, int ex
);
201 void ocfs2_mark_lockres_freeing(struct ocfs2_super
*osb
,
202 struct ocfs2_lock_res
*lockres
);
203 void ocfs2_simple_drop_lockres(struct ocfs2_super
*osb
,
204 struct ocfs2_lock_res
*lockres
);
206 /* for the downconvert thread */
207 void ocfs2_wake_downconvert_thread(struct ocfs2_super
*osb
);
209 struct ocfs2_dlm_debug
*ocfs2_new_dlm_debug(void);
210 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug
*dlm_debug
);
212 /* To set the locking protocol on module initialization */
213 void ocfs2_set_locking_protocol(void);
215 /* The _tracker pair is used to avoid cluster recursive locking */
216 int ocfs2_inode_lock_tracker(struct inode
*inode
,
217 struct buffer_head
**ret_bh
,
219 struct ocfs2_lock_holder
*oh
);
220 void ocfs2_inode_unlock_tracker(struct inode
*inode
,
222 struct ocfs2_lock_holder
*oh
,
225 #endif /* DLMGLUE_H */