2 * Copyright (C) 2012 Alexander Block. All rights reserved.
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.
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.
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.
19 #ifndef __BTRFS_SEND_UTILS_H__
20 #define __BTRFS_SEND_UTILS_H__
22 #if BTRFS_FLAT_INCLUDES
26 #include <btrfs/ctree.h>
27 #include <btrfs/rbtree.h>
28 #endif /* BTRFS_FLAT_INCLUDES */
35 * Compatibility code for kernels < 3.12; the UUID tree is not available there
36 * and we have to do the slow search. This should be deprecated someday.
38 #define BTRFS_COMPAT_SEND_NO_UUID_TREE 1
40 enum subvol_search_type {
41 subvol_search_by_root_id,
42 subvol_search_by_uuid,
43 subvol_search_by_received_uuid,
44 subvol_search_by_path,
48 #ifdef BTRFS_COMPAT_SEND_NO_UUID_TREE
49 struct rb_node rb_root_id_node;
50 struct rb_node rb_local_node;
51 struct rb_node rb_received_node;
52 struct rb_node rb_path_node;
56 u8 uuid[BTRFS_UUID_SIZE];
57 u8 parent_uuid[BTRFS_UUID_SIZE];
58 u8 received_uuid[BTRFS_UUID_SIZE];
67 struct subvol_uuid_search {
69 #ifdef BTRFS_COMPAT_SEND_NO_UUID_TREE
70 int uuid_tree_existed;
72 struct rb_root root_id_subvols;
73 struct rb_root local_subvols;
74 struct rb_root received_subvols;
75 struct rb_root path_subvols;
79 int subvol_uuid_search_init(int mnt_fd, struct subvol_uuid_search *s);
80 void subvol_uuid_search_finit(struct subvol_uuid_search *s);
81 struct subvol_info *subvol_uuid_search(struct subvol_uuid_search *s,
82 u64 root_id, const u8 *uuid, u64 transid,
84 enum subvol_search_type type);
85 void subvol_uuid_search_add(struct subvol_uuid_search *s,
86 struct subvol_info *si);
88 int btrfs_subvolid_resolve(int fd, char *path, size_t path_len, u64 subvol_id);
90 char *path_cat(const char *p1, const char *p2);
91 char *path_cat3(const char *p1, const char *p2, const char *p3);