diff options
Diffstat (limited to 'transaction.h')
| -rw-r--r-- | transaction.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/transaction.h b/transaction.h new file mode 100644 index 00000000..13e09a64 --- /dev/null +++ b/transaction.h @@ -0,0 +1,64 @@ +/* + * 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 __BTRFS_TRANSACTION_H__ +#define __BTRFS_TRANSACTION_H__ + +#include "kerncompat.h" +#include "ctree.h" + +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 |