blob: d293a22c32c5447e3595f1a61deba545f74df7e5 [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- 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
Mark Fashehd680efe2006-09-08 14:14:34 -070030#include "dcache.h"
31
Mark Fasheh15b1e362007-09-07 13:58:15 -070032#define OCFS2_LVB_VERSION 5
Mark Fashehccd979b2005-12-15 14:31:24 -080033
34struct ocfs2_meta_lvb {
Mark Fasheh4d3b83f2006-09-12 15:22:18 -070035 __u8 lvb_version;
Mark Fasheh24c19ef2006-09-22 17:28:19 -070036 __u8 lvb_reserved0;
Mark Fasheh15b1e362007-09-07 13:58:15 -070037 __be16 lvb_idynfeatures;
Mark Fashehccd979b2005-12-15 14:31:24 -080038 __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;
Herbert Poetzlca4d1472006-07-03 17:27:12 -070047 __be32 lvb_iattr;
Mark Fashehf9e2d822006-09-12 15:35:49 -070048 __be32 lvb_igeneration;
49 __be32 lvb_reserved2;
Mark Fashehccd979b2005-12-15 14:31:24 -080050};
51
Jan Kara9e33d692008-08-25 19:56:50 +020052#define OCFS2_QINFO_LVB_VERSION 1
53
54struct 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
Srinivas Eeda83273932009-06-03 17:02:55 -070065#define OCFS2_ORPHAN_LVB_VERSION 1
66
67struct ocfs2_orphan_scan_lvb {
68 __u8 lvb_version;
69 __u8 lvb_reserved[3];
70 __be32 lvb_os_seqno;
71};
72
Mark Fashehe63aecb62007-10-18 15:30:42 -070073/* ocfs2_inode_lock_full() 'arg_flags' flags */
Mark Fashehccd979b2005-12-15 14:31:24 -080074/* don't wait on recovery. */
75#define OCFS2_META_LOCK_RECOVERY (0x01)
76/* Instruct the dlm not to queue ourselves on the other node. */
77#define OCFS2_META_LOCK_NOQUEUE (0x02)
Mark Fasheh34d024f2007-09-24 15:56:19 -070078/* don't block waiting for the downconvert thread, instead return -EAGAIN */
Mark Fashehccd979b2005-12-15 14:31:24 -080079#define OCFS2_LOCK_NONBLOCK (0x04)
80
Jan Karacb257972009-06-04 15:26:50 +020081/* Locking subclasses of inode cluster lock */
82enum {
83 OI_LS_NORMAL = 0,
84 OI_LS_PARENT,
85 OI_LS_RENAME1,
86 OI_LS_RENAME2,
Tao Ma07eaac92010-09-07 13:30:06 +080087 OI_LS_REFLINK_TARGET,
Jan Karacb257972009-06-04 15:26:50 +020088};
89
Mark Fashehccd979b2005-12-15 14:31:24 -080090int ocfs2_dlm_init(struct ocfs2_super *osb);
Joel Becker286eaa92008-02-01 15:03:57 -080091void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
Mark Fashehccd979b2005-12-15 14:31:24 -080092void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
93void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
94 enum ocfs2_lock_type type,
Mark Fasheh24c19ef2006-09-22 17:28:19 -070095 unsigned int generation,
Mark Fashehccd979b2005-12-15 14:31:24 -080096 struct inode *inode);
Mark Fashehd680efe2006-09-08 14:14:34 -070097void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
98 u64 parent, struct inode *inode);
Mark Fashehcf8e06f2007-12-20 16:43:10 -080099struct ocfs2_file_private;
100void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
101 struct ocfs2_file_private *fp);
Jan Kara9e33d692008-08-25 19:56:50 +0200102struct ocfs2_mem_dqinfo;
103void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres,
104 struct ocfs2_mem_dqinfo *info);
Tao Ma8dec98e2009-08-18 11:19:58 +0800105void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres,
106 struct ocfs2_super *osb, u64 ref_blkno,
107 unsigned int generation);
Mark Fashehccd979b2005-12-15 14:31:24 -0800108void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
109int ocfs2_create_new_inode_locks(struct inode *inode);
110int ocfs2_drop_inode_locks(struct inode *inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800111int ocfs2_rw_lock(struct inode *inode, int write);
112void ocfs2_rw_unlock(struct inode *inode, int write);
Tiger Yang50008632007-03-20 16:01:38 -0700113int ocfs2_open_lock(struct inode *inode);
114int ocfs2_try_open_lock(struct inode *inode, int write);
115void ocfs2_open_unlock(struct inode *inode);
Mark Fashehe63aecb62007-10-18 15:30:42 -0700116int ocfs2_inode_lock_atime(struct inode *inode,
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800117 struct vfsmount *vfsmnt,
118 int *level);
Jan Karacb257972009-06-04 15:26:50 +0200119int ocfs2_inode_lock_full_nested(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800120 struct buffer_head **ret_bh,
121 int ex,
Jan Karacb257972009-06-04 15:26:50 +0200122 int arg_flags,
123 int subclass);
Mark Fashehe63aecb62007-10-18 15:30:42 -0700124int ocfs2_inode_lock_with_page(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800125 struct buffer_head **ret_bh,
126 int ex,
127 struct page *page);
Jan Karacb257972009-06-04 15:26:50 +0200128/* Variants without special locking class or flags */
129#define ocfs2_inode_lock_full(i, r, e, f)\
130 ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL)
131#define ocfs2_inode_lock_nested(i, b, e, s)\
132 ocfs2_inode_lock_full_nested(i, b, e, 0, s)
Mark Fashehccd979b2005-12-15 14:31:24 -0800133/* 99% of the time we don't want to supply any additional flags --
134 * those are for very specific cases only. */
Jan Karacb257972009-06-04 15:26:50 +0200135#define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL)
Mark Fashehe63aecb62007-10-18 15:30:42 -0700136void ocfs2_inode_unlock(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800137 int ex);
138int ocfs2_super_lock(struct ocfs2_super *osb,
139 int ex);
140void ocfs2_super_unlock(struct ocfs2_super *osb,
141 int ex);
Sunil Mushrandf152c22009-06-22 11:40:07 -0700142int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno);
143void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno);
Srinivas Eeda83273932009-06-03 17:02:55 -0700144
Mark Fashehccd979b2005-12-15 14:31:24 -0800145int ocfs2_rename_lock(struct ocfs2_super *osb);
146void ocfs2_rename_unlock(struct ocfs2_super *osb);
wengang wang6ca497a2009-03-06 21:29:10 +0800147int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
148void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
Mark Fashehd680efe2006-09-08 14:14:34 -0700149int ocfs2_dentry_lock(struct dentry *dentry, int ex);
150void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
Mark Fashehcf8e06f2007-12-20 16:43:10 -0800151int ocfs2_file_lock(struct file *file, int ex, int trylock);
152void ocfs2_file_unlock(struct file *file);
Jan Kara9e33d692008-08-25 19:56:50 +0200153int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex);
154void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex);
Tao Ma8dec98e2009-08-18 11:19:58 +0800155struct ocfs2_refcount_tree;
156int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex);
157void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex);
Jan Kara9e33d692008-08-25 19:56:50 +0200158
Mark Fashehd680efe2006-09-08 14:14:34 -0700159
Jan Kara84d86f82014-04-03 14:46:57 -0700160void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb,
161 struct ocfs2_lock_res *lockres);
Mark Fashehd680efe2006-09-08 14:14:34 -0700162void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
163 struct ocfs2_lock_res *lockres);
Mark Fashehccd979b2005-12-15 14:31:24 -0800164
Mark Fasheh34d024f2007-09-24 15:56:19 -0700165/* for the downconvert thread */
Mark Fasheh34d024f2007-09-24 15:56:19 -0700166void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
Mark Fashehccd979b2005-12-15 14:31:24 -0800167
168struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
169void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
170
Joel Becker63e0c482008-01-30 16:58:36 -0800171/* To set the locking protocol on module initialization */
172void ocfs2_set_locking_protocol(void);
Mark Fashehccd979b2005-12-15 14:31:24 -0800173#endif /* DLMGLUE_H */