/* * Copyright (C) 2012 Alexander Block. 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_SEND_UTILS_H__ #define __BTRFS_SEND_UTILS_H__ #if BTRFS_FLAT_INCLUDES #include "libbtrfs/kerncompat.h" #include #include "libbtrfs/ctree.h" #include "kernel-lib/rbtree_types.h" #else #include #include #include #include #endif /* BTRFS_FLAT_INCLUDES */ #ifdef __cplusplus extern "C" { #endif /* * Compatibility code for kernels < 3.12; the UUID tree is not available there * and we have to do the slow search. This should be deprecated someday. */ #define BTRFS_COMPAT_SEND_NO_UUID_TREE 1 enum subvol_search_type { subvol_search_by_root_id, subvol_search_by_uuid, subvol_search_by_received_uuid, subvol_search_by_path, }; struct subvol_info { #ifdef BTRFS_COMPAT_SEND_NO_UUID_TREE struct rb_node rb_root_id_node; struct rb_node rb_local_node; struct rb_node rb_received_node; struct rb_node rb_path_node; #endif u64 root_id; u8 uuid[BTRFS_UUID_SIZE]; u8 parent_uuid[BTRFS_UUID_SIZE]; u8 received_uuid[BTRFS_UUID_SIZE]; u64 ctransid; u64 otransid; u64 stransid; u64 rtransid; char *path; }; struct subvol_uuid_search { int mnt_fd; #ifdef BTRFS_COMPAT_SEND_NO_UUID_TREE int uuid_tree_existed; struct rb_root root_id_subvols; struct rb_root local_subvols; struct rb_root received_subvols; struct rb_root path_subvols; #endif }; int subvol_uuid_search_init(int mnt_fd, struct subvol_uuid_search *s); /* * Search for a subvolume by given type (received uuid, root id, path), returns * pointer to newly allocated struct subvol_info or NULL in case it's not found * or there was another error. */ struct subvol_info *subvol_uuid_search(struct subvol_uuid_search *s, u64 root_id, const u8 *uuid, u64 transid, const char *path, enum subvol_search_type type); int btrfs_subvolid_resolve(int fd, char *path, size_t path_len, u64 subvol_id); #ifdef __cplusplus } #endif #endif