[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ocfs2 / refcounttree.h

/* -*- 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;
};

void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
			     struct ocfs2_refcount_tree **tree,
			     struct buffer_head **ref_bh);
void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
				struct ocfs2_refcount_tree *tree,
				int rw);

int ocfs2_decrease_refcount(struct inode *inode,
			    handle_t *handle, u32 cpos, u32 len,
			    struct ocfs2_alloc_context *meta_ac,
			    struct ocfs2_cached_dealloc_ctxt *dealloc);
int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
					  struct buffer_head *di_bh,
					  u64 phys_blkno,
					  u32 clusters,
					  int *credits,
					  struct ocfs2_alloc_context **meta_ac);
#endif /* OCFS2_REFCOUNTTREE_H */
Commit	Line	Data
8dec98ed TM	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* refcounttree.h
	5	*
	6	* Copyright (C) 2009 Oracle. All rights reserved.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public
	10	* License version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*/
	17	#ifndef OCFS2_REFCOUNTTREE_H
	18	#define OCFS2_REFCOUNTTREE_H
	19
	20	struct ocfs2_refcount_tree {
	21	struct rb_node rf_node;
	22	u64 rf_blkno;
	23	u32 rf_generation;
	24	struct rw_semaphore rf_sem;
	25	struct ocfs2_lock_res rf_lockres;
	26	struct kref rf_getcnt;
	27	int rf_removed;
	28
	29	/* the following 4 fields are used by caching_info. */
	30	struct ocfs2_caching_info rf_ci;
	31	spinlock_t rf_lock;
	32	struct mutex rf_io_mutex;
	33	struct super_block *rf_sb;
	34	};
	35
374a263e TM	36	void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
	37	int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
	38	struct ocfs2_refcount_tree **tree,
	39	struct buffer_head **ref_bh);
	40	void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
	41	struct ocfs2_refcount_tree *tree,
	42	int rw);
1823cb0b TM	43
	44	int ocfs2_decrease_refcount(struct inode *inode,
	45	handle_t *handle, u32 cpos, u32 len,
	46	struct ocfs2_alloc_context *meta_ac,
	47	struct ocfs2_cached_dealloc_ctxt *dealloc);
bcbbb24a TM	48	int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
	49	struct buffer_head *di_bh,
	50	u64 phys_blkno,
	51	u32 clusters,
	52	int *credits,
	53	struct ocfs2_alloc_context **meta_ac);
8dec98ed	54	#endif /* OCFS2_REFCOUNTTREE_H */