btrfs-progs/transaction.h
Nikolay Borisov c6039704c5 btrfs-progs: Add delayed refs infrastructure
This commit pulls those portions of the kernel implementation of
delayed refs which are necessary to have them working in user-space.
I've done the following modifications:

1. Replaced all kmem_cache_alloc calls to kmalloc.

2. Removed all locking-related code, since we are single threaded in
   userspace.

3. Removed code which deals with data refs - delayed refs in user space
   are going to be used only for cowonly trees.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-10-23 14:48:41 +02:00

51 lines
1.6 KiB
C

/*
* 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"
#include "delayed-ref.h"
struct btrfs_trans_handle {
struct btrfs_fs_info *fs_info;
u64 transid;
u64 alloc_exclude_start;
u64 alloc_exclude_nr;
bool reinit_extent_tree;
u64 delayed_ref_updates;
unsigned long blocks_reserved;
unsigned long blocks_used;
struct btrfs_block_group_cache *block_group;
struct btrfs_delayed_ref_root delayed_refs;
};
struct btrfs_trans_handle* btrfs_start_transaction(struct btrfs_root *root,
int num_blocks);
int __commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int commit_tree_roots(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
void btrfs_abort_transaction(struct btrfs_trans_handle *trans, int error);
#endif