send-utils.h

   1 /*
   2  * Copyright (C) 2012 Alexander Block.  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 #ifndef SEND_UTILS_H_
  19 #define SEND_UTILS_H_
  20
  21 #if BTRFS_FLAT_INCLUDES
  22 #include "ctree.h"
  23 #include "rbtree.h"
  24 #else
  25 #include <btrfs/ctree.h>
  26 #include <btrfs/rbtree.h>
  27 #endif /* BTRFS_FLAT_INCLUDES */
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 enum subvol_search_type {
  34         subvol_search_by_root_id,
  35         subvol_search_by_uuid,
  36         subvol_search_by_received_uuid,
  37         subvol_search_by_path,
  38 };
  39
  40 struct subvol_info {
  41         struct rb_node rb_root_id_node;
  42         struct rb_node rb_local_node;
  43         struct rb_node rb_received_node;
  44         struct rb_node rb_path_node;
  45
  46         u64 root_id;
  47         u8 uuid[BTRFS_UUID_SIZE];
  48         u8 parent_uuid[BTRFS_UUID_SIZE];
  49         u8 received_uuid[BTRFS_UUID_SIZE];
  50         u64 ctransid;
  51         u64 otransid;
  52         u64 stransid;
  53         u64 rtransid;
  54
  55         char *path;
  56 };
  57
  58 struct subvol_uuid_search {
  59         int mnt_fd;
  60         int uuid_tree_existed;
  61
  62         struct rb_root root_id_subvols;
  63         struct rb_root local_subvols;
  64         struct rb_root received_subvols;
  65         struct rb_root path_subvols;
  66 };
  67
  68 int subvol_uuid_search_init(int mnt_fd, struct subvol_uuid_search *s);
  69 void subvol_uuid_search_finit(struct subvol_uuid_search *s);
  70 struct subvol_info *subvol_uuid_search(struct subvol_uuid_search *s,
  71                                        u64 root_id, const u8 *uuid, u64 transid,
  72                                        const char *path,
  73                                        enum subvol_search_type type);
  74 void subvol_uuid_search_add(struct subvol_uuid_search *s,
  75                             struct subvol_info *si);
  76
  77 int btrfs_subvolid_resolve(int fd, char *path, size_t path_len, u64 subvol_id);
  78
  79 char *path_cat(const char *p1, const char *p2);
  80 char *path_cat3(const char *p1, const char *p2, const char *p3);
  81
  82 #ifdef __cplusplus
  83 }
  84 #endif
  85
  86 #endif /* SEND_UTILS_H_ */