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ocfs2: Add new refcount tree lock resource in dlmglue.

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refcount tree lock resource is used to protect refcount
tree read/write among multiple nodes.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma
2009-08-18 11:19:58 +08:00
committed by Joel Becker
parent a433848132
commit 8dec98edfe
4 changed files with 127 additions and 0 deletions
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36
fs/ocfs2/refcounttree.h Normal file
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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* refcounttree.h
*
* Copyright (C) 2009 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef OCFS2_REFCOUNTTREE_H
#define OCFS2_REFCOUNTTREE_H
struct ocfs2_refcount_tree {
struct rb_node rf_node;
u64 rf_blkno;
u32 rf_generation;
struct rw_semaphore rf_sem;
struct ocfs2_lock_res rf_lockres;
struct kref rf_getcnt;
int rf_removed;
/* the following 4 fields are used by caching_info. */
struct ocfs2_caching_info rf_ci;
spinlock_t rf_lock;
struct mutex rf_io_mutex;
struct super_block *rf_sb;
};
#endif /* OCFS2_REFCOUNTTREE_H */