blob: e8610b1db324fe897182ec76d44faef62118d396 [file] [log] [blame]
/*
* Copyright (C) 2007 Oracle. 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 __TRANSACTION__
#define __TRANSACTION__
struct btrfs_trans_handle {
u64 transid;
u64 alloc_exclude_start;
u64 alloc_exclude_nr;
unsigned long blocks_reserved;
unsigned long blocks_used;
struct btrfs_block_group_cache *block_group;
};
static inline struct btrfs_trans_handle *
btrfs_start_transaction(struct btrfs_root *root, int num_blocks)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_trans_handle *h = malloc(sizeof(*h));
BUG_ON(!h);
BUG_ON(root->commit_root);
BUG_ON(fs_info->running_transaction);
fs_info->running_transaction = h;
fs_info->generation++;
h->transid = fs_info->generation;
h->alloc_exclude_start = 0;
h->alloc_exclude_nr = 0;
h->blocks_reserved = num_blocks;
h->blocks_used = 0;
h->block_group = NULL;
root->last_trans = h->transid;
root->commit_root = root->node;
extent_buffer_get(root->node);
return h;
}
static inline void btrfs_free_transaction(struct btrfs_root *root,
struct btrfs_trans_handle *handle)
{
memset(handle, 0, sizeof(*handle));
free(handle);
}
#endif