btrfs-progs: opencode trivial helper btrfs_free_transaction
[platform/upstream/btrfs-progs.git] / transaction.h
1 /*
2  * Copyright (C) 2007 Oracle.  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_TRANSACTION_H__
20 #define __BTRFS_TRANSACTION_H__
21
22 #include "kerncompat.h"
23 #include "ctree.h"
24
25 struct btrfs_trans_handle {
26         u64 transid;
27         u64 alloc_exclude_start;
28         u64 alloc_exclude_nr;
29         unsigned long blocks_reserved;
30         unsigned long blocks_used;
31         struct btrfs_block_group_cache *block_group;
32 };
33
34 static inline struct btrfs_trans_handle *
35 btrfs_start_transaction(struct btrfs_root *root, int num_blocks)
36 {
37         struct btrfs_fs_info *fs_info = root->fs_info;
38         struct btrfs_trans_handle *h = malloc(sizeof(*h));
39
40         BUG_ON(!h);
41         BUG_ON(root->commit_root);
42         BUG_ON(fs_info->running_transaction);
43         fs_info->running_transaction = h;
44         fs_info->generation++;
45         h->transid = fs_info->generation;
46         h->alloc_exclude_start = 0;
47         h->alloc_exclude_nr = 0;
48         h->blocks_reserved = num_blocks;
49         h->blocks_used = 0;
50         h->block_group = NULL;
51         root->last_trans = h->transid;
52         root->commit_root = root->node;
53         extent_buffer_get(root->node);
54         return h;
55 }
56
57 #endif