btrfs-progs/qgroup.h

/*
 * Copyright (C) 2012 STRATO.  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 v2 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.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef __BTRFS_QGROUP_H__
#define __BTRFS_QGROUP_H__

#include "kerncompat.h"
#include "ioctl.h"

struct btrfs_qgroup;

typedef int (*btrfs_qgroup_filter_func)(struct btrfs_qgroup *, u64);
typedef int (*btrfs_qgroup_comp_func)(struct btrfs_qgroup *,
				      struct btrfs_qgroup *, int);


struct btrfs_qgroup_filter {
	btrfs_qgroup_filter_func filter_func;
	u64 data;
};

struct btrfs_qgroup_comparer {
	btrfs_qgroup_comp_func comp_func;
	int is_descending;
};

struct btrfs_qgroup_filter_set {
	int total;
	int nfilters;
	struct btrfs_qgroup_filter filters[0];
};

struct btrfs_qgroup_comparer_set {
	int total;
	int ncomps;
	struct btrfs_qgroup_comparer comps[0];
};

enum btrfs_qgroup_column_enum {
	BTRFS_QGROUP_QGROUPID,
	BTRFS_QGROUP_RFER,
	BTRFS_QGROUP_EXCL,
	BTRFS_QGROUP_MAX_RFER,
	BTRFS_QGROUP_MAX_EXCL,
	BTRFS_QGROUP_PARENT,
	BTRFS_QGROUP_CHILD,
	BTRFS_QGROUP_ALL,
};

enum btrfs_qgroup_comp_enum {
	BTRFS_QGROUP_COMP_QGROUPID,
	BTRFS_QGROUP_COMP_RFER,
	BTRFS_QGROUP_COMP_EXCL,
	BTRFS_QGROUP_COMP_MAX_RFER,
	BTRFS_QGROUP_COMP_MAX_EXCL,
	BTRFS_QGROUP_COMP_MAX
};

enum btrfs_qgroup_filter_enum {
	BTRFS_QGROUP_FILTER_PARENT,
	BTRFS_QGROUP_FILTER_ALL_PARENT,
	BTRFS_QGROUP_FILTER_MAX,
};

struct btrfs_qgroup_info {
	u64 generation;
	u64 referenced;
	u64 referenced_compressed;
	u64 exclusive;
	u64 exclusive_compressed;
};

struct btrfs_qgroup_stats {
	u64 qgroupid;
	struct btrfs_qgroup_info info;
	struct btrfs_qgroup_limit limit;
};

int btrfs_qgroup_parse_sort_string(const char *opt_arg,
				struct btrfs_qgroup_comparer_set **comps);
int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
		       struct btrfs_qgroup_comparer_set *);
void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
void btrfs_qgroup_setup_units(unsigned unit_mode);
struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);
int btrfs_qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
			      enum btrfs_qgroup_filter_enum, u64 data);
struct btrfs_qgroup_comparer_set *btrfs_qgroup_alloc_comparer_set(void);
int btrfs_qgroup_setup_comparer(struct btrfs_qgroup_comparer_set **comp_set,
				enum btrfs_qgroup_comp_enum comparer,
				int is_descending);
int qgroup_inherit_size(struct btrfs_qgroup_inherit *p);
int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg);
int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
			    int type);

int btrfs_qgroup_query(int fd, u64 qgroupid, struct btrfs_qgroup_stats *stats);
#endif