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 <linux/btrfs.h> 23 #include "ulist.h" 24 #include "extent_io.h" 25 26 #define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0) 27 28 struct inode_fs_paths { 29 struct btrfs_path *btrfs_path; 30 struct btrfs_root *fs_root; 31 struct btrfs_data_container *fspath; 32 }; 33 34 typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root, 35 void *ctx); 36 37 int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root, 38 struct btrfs_path *path); 39 40 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, 41 struct btrfs_path *path, struct btrfs_key *found_key, 42 u64 *flags); 43 44 int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb, 45 struct btrfs_extent_item *ei, u32 item_size, 46 u64 *out_root, u8 *out_level); 47 48 int iterate_extent_inodes(struct btrfs_fs_info *fs_info, 49 u64 extent_item_objectid, 50 u64 extent_offset, int search_commit_root, 51 iterate_extent_inodes_t *iterate, void *ctx); 52 53 int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, 54 struct btrfs_path *path, 55 iterate_extent_inodes_t *iterate, void *ctx); 56 57 int paths_from_inode(u64 inum, struct inode_fs_paths *ipath); 58 59 int btrfs_find_all_roots(struct btrfs_trans_handle *trans, 60 struct btrfs_fs_info *fs_info, u64 bytenr, 61 u64 time_seq, struct ulist **roots); 62 char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, 63 struct btrfs_inode_ref *iref, struct extent_buffer *eb, 64 u64 parent, char *dest, u32 size); 65 char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, 66 u32 name_len, unsigned long name_off, 67 struct extent_buffer *eb_in, u64 parent, 68 char *dest, u32 size); 69 70 struct btrfs_data_container *init_data_container(u32 total_bytes); 71 struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root, 72 struct btrfs_path *path); 73 void free_ipath(struct inode_fs_paths *ipath); 74 75 int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid, 76 u64 start_off, struct btrfs_path *path, 77 struct btrfs_inode_extref **ret_extref, 78 u64 *found_off); 79 80 #endif 81