1/*
2 * Copyright (C) 2008 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 __TREE_LOG_
20#define __TREE_LOG_
21
22#include "ctree.h"
23#include "transaction.h"
24
25/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
26#define BTRFS_NO_LOG_SYNC 256
27
28struct btrfs_log_ctx {
29	int log_ret;
30	int log_transid;
31	int io_err;
32	bool log_new_dentries;
33	struct list_head list;
34};
35
36static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx)
37{
38	ctx->log_ret = 0;
39	ctx->log_transid = 0;
40	ctx->io_err = 0;
41	ctx->log_new_dentries = false;
42	INIT_LIST_HEAD(&ctx->list);
43}
44
45static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
46					     struct btrfs_trans_handle *trans)
47{
48	ACCESS_ONCE(fs_info->last_trans_log_full_commit) = trans->transid;
49}
50
51static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
52					     struct btrfs_trans_handle *trans)
53{
54	return ACCESS_ONCE(fs_info->last_trans_log_full_commit) ==
55		trans->transid;
56}
57
58int btrfs_sync_log(struct btrfs_trans_handle *trans,
59		   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
60int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
61int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
62			     struct btrfs_fs_info *fs_info);
63int btrfs_recover_log_trees(struct btrfs_root *tree_root);
64int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
65			  struct btrfs_root *root, struct dentry *dentry,
66			  const loff_t start,
67			  const loff_t end,
68			  struct btrfs_log_ctx *ctx);
69int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
70				 struct btrfs_root *root,
71				 const char *name, int name_len,
72				 struct inode *dir, u64 index);
73int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
74			       struct btrfs_root *root,
75			       const char *name, int name_len,
76			       struct inode *inode, u64 dirid);
77void btrfs_end_log_trans(struct btrfs_root *root);
78int btrfs_pin_log_trans(struct btrfs_root *root);
79void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
80			     struct inode *dir, struct inode *inode,
81			     int for_rename);
82int btrfs_log_new_name(struct btrfs_trans_handle *trans,
83			struct inode *inode, struct inode *old_dir,
84			struct dentry *parent);
85#endif
86