[deliverable/linux.git] / fs / btrfs / backref.h

/*
 * Copyright (C) 2011 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_BACKREF__
#define __BTRFS_BACKREF__

#include <linux/btrfs.h>
#include "ulist.h"
#include "extent_io.h"

struct inode_fs_paths {
	struct btrfs_path		*btrfs_path;
	struct btrfs_root		*fs_root;
	struct btrfs_data_container	*fspath;
};

typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
		void *ctx);

int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
			struct btrfs_path *path, struct btrfs_key *found_key,
			u64 *flags);

int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
			    struct btrfs_key *key, struct btrfs_extent_item *ei,
			    u32 item_size, u64 *out_root, u8 *out_level);

int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
				u64 extent_item_objectid,
				u64 extent_offset, int search_commit_root,
				iterate_extent_inodes_t *iterate, void *ctx);

int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
				struct btrfs_path *path,
				iterate_extent_inodes_t *iterate, void *ctx);

int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);

int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
			 struct btrfs_fs_info *fs_info, u64 bytenr,
			 u64 time_seq, struct ulist **roots);
char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
			u32 name_len, unsigned long name_off,
			struct extent_buffer *eb_in, u64 parent,
			char *dest, u32 size);

struct btrfs_data_container *init_data_container(u32 total_bytes);
struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
					struct btrfs_path *path);
void free_ipath(struct inode_fs_paths *ipath);

int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
			  u64 start_off, struct btrfs_path *path,
			  struct btrfs_inode_extref **ret_extref,
			  u64 *found_off);
int btrfs_check_shared(struct btrfs_trans_handle *trans,
		       struct btrfs_fs_info *fs_info, u64 root_objectid,
		       u64 inum, u64 bytenr);

int __init btrfs_prelim_ref_init(void);
void btrfs_prelim_ref_exit(void);
#endif
Commit	Line	Data
a542ad1b JS	1	/*
	2	* Copyright (C) 2011 STRATO. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public
	6	* License v2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public
	14	* License along with this program; if not, write to the
	15	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	16	* Boston, MA 021110-1307, USA.
	17	*/
	18
	19	#ifndef __BTRFS_BACKREF__
	20	#define __BTRFS_BACKREF__
	21
55e301fd	22	#include <linux/btrfs.h>
8da6d581	23	#include "ulist.h"
91cb916c	24	#include "extent_io.h"
a542ad1b JS	25
	26	struct inode_fs_paths {
	27	struct btrfs_path *btrfs_path;
	28	struct btrfs_root *fs_root;
	29	struct btrfs_data_container *fspath;
	30	};
	31
	32	typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
	33	void *ctx);
a542ad1b	34
a542ad1b	35	int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
69917e43 LB	36	struct btrfs_path path, struct btrfs_key found_key,
69917e43 LB	37	u64 *flags);
a542ad1b JS	38
a542ad1b JS	39	int tree_backref_for_extent(unsigned long ptr, struct extent_buffer eb,
6eda71d0 LB	40	struct btrfs_key key, struct btrfs_extent_item ei,
6eda71d0 LB	41	u32 item_size, u64 out_root, u8 out_level);
a542ad1b JS	42
a542ad1b JS	43	int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
a542ad1b	44	u64 extent_item_objectid,
7a3ae2f8	45	u64 extent_offset, int search_commit_root,
a542ad1b JS	46	iterate_extent_inodes_t iterate, void ctx);
	47
	48	int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
	49	struct btrfs_path *path,
	50	iterate_extent_inodes_t iterate, void ctx);
	51
	52	int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
	53
8da6d581	54	int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
fcebe456 JB	55	struct btrfs_fs_info *fs_info, u64 bytenr,
fcebe456 JB	56	u64 time_seq, struct ulist **roots);
96b5bd77 JS	57	char btrfs_ref_to_path(struct btrfs_root fs_root, struct btrfs_path *path,
	58	u32 name_len, unsigned long name_off,
	59	struct extent_buffer *eb_in, u64 parent,
	60	char *dest, u32 size);
8da6d581	61
a542ad1b JS	62	struct btrfs_data_container *init_data_container(u32 total_bytes);
	63	struct inode_fs_paths init_ipath(s32 total_bytes, struct btrfs_root fs_root,
	64	struct btrfs_path *path);
	65	void free_ipath(struct inode_fs_paths *ipath);
	66
f186373f MF	67	int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
	68	u64 start_off, struct btrfs_path *path,
	69	struct btrfs_inode_extref **ret_extref,
	70	u64 *found_off);
dc046b10 JB	71	int btrfs_check_shared(struct btrfs_trans_handle *trans,
	72	struct btrfs_fs_info *fs_info, u64 root_objectid,
	73	u64 inum, u64 bytenr);
f186373f	74
b9e9a6cb WS	75	int __init btrfs_prelim_ref_init(void);
b9e9a6cb WS	76	void btrfs_prelim_ref_exit(void);
a542ad1b	77	#endif