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 22 #include "ioctl.h" 23 24 struct inode_fs_paths { 25 struct btrfs_path *btrfs_path; 26 struct btrfs_root *fs_root; 27 struct btrfs_data_container *fspath; 28 }; 29 30 typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root, 31 void *ctx); 32 typedef int (iterate_irefs_t)(u64 parent, struct btrfs_inode_ref *iref, 33 struct extent_buffer *eb, void *ctx); 34 35 int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root, 36 struct btrfs_path *path); 37 38 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, 39 struct btrfs_path *path, struct btrfs_key *found_key); 40 41 int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb, 42 struct btrfs_extent_item *ei, u32 item_size, 43 u64 *out_root, u8 *out_level); 44 45 int iterate_extent_inodes(struct btrfs_fs_info *fs_info, 46 struct btrfs_path *path, 47 u64 extent_item_objectid, 48 u64 extent_offset, 49 iterate_extent_inodes_t *iterate, void *ctx); 50 51 int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, 52 struct btrfs_path *path, 53 iterate_extent_inodes_t *iterate, void *ctx); 54 55 int paths_from_inode(u64 inum, struct inode_fs_paths *ipath); 56 57 struct btrfs_data_container *init_data_container(u32 total_bytes); 58 struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root, 59 struct btrfs_path *path); 60 void free_ipath(struct inode_fs_paths *ipath); 61 62 #endif 63