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/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
23#define BTRFS_NO_LOG_SYNC 256
24
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
25int btrfs_sync_log(struct btrfs_trans_handle *trans,
26		   struct btrfs_root *root);
27int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
28int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
29			     struct btrfs_fs_info *fs_info);
30int btrfs_recover_log_trees(struct btrfs_root *tree_root);
31int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
32			  struct btrfs_root *root, struct dentry *dentry);
 
 
 
33int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
34				 struct btrfs_root *root,
35				 const char *name, int name_len,
36				 struct inode *dir, u64 index);
37int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
38			       struct btrfs_root *root,
39			       const char *name, int name_len,
40			       struct inode *inode, u64 dirid);
41int btrfs_end_log_trans(struct btrfs_root *root);
42int btrfs_pin_log_trans(struct btrfs_root *root);
43int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
44		    struct btrfs_root *root, struct inode *inode,
45		    struct dentry *parent, int exists_only);
46void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
47			     struct inode *dir, struct inode *inode,
48			     int for_rename);
 
 
 
 
 
 
 
 
 
49int btrfs_log_new_name(struct btrfs_trans_handle *trans,
50			struct inode *inode, struct inode *old_dir,
51			struct dentry *parent);
 
 
52#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Copyright (C) 2008 Oracle.  All rights reserved.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 4 */
 5
 6#ifndef BTRFS_TREE_LOG_H
 7#define BTRFS_TREE_LOG_H
 8
 9#include "ctree.h"
10#include "transaction.h"
11
12/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
13#define BTRFS_NO_LOG_SYNC 256
14
15struct btrfs_log_ctx {
16	int log_ret;
17	int log_transid;
18	bool log_new_dentries;
19	struct inode *inode;
20	struct list_head list;
21};
22
23static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
24				      struct inode *inode)
25{
26	ctx->log_ret = 0;
27	ctx->log_transid = 0;
28	ctx->log_new_dentries = false;
29	ctx->inode = inode;
30	INIT_LIST_HEAD(&ctx->list);
31}
32
33static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
34{
35	WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
36}
37
38static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
39{
40	return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
41		trans->transid;
42}
43
44int btrfs_sync_log(struct btrfs_trans_handle *trans,
45		   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
46int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
47int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
48			     struct btrfs_fs_info *fs_info);
49int btrfs_recover_log_trees(struct btrfs_root *tree_root);
50int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
51			  struct dentry *dentry,
52			  const loff_t start,
53			  const loff_t end,
54			  struct btrfs_log_ctx *ctx);
55int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
56				 struct btrfs_root *root,
57				 const char *name, int name_len,
58				 struct btrfs_inode *dir, u64 index);
59int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
60			       struct btrfs_root *root,
61			       const char *name, int name_len,
62			       struct btrfs_inode *inode, u64 dirid);
63void btrfs_end_log_trans(struct btrfs_root *root);
64void btrfs_pin_log_trans(struct btrfs_root *root);
 
 
 
65void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
66			     struct btrfs_inode *dir, struct btrfs_inode *inode,
67			     int for_rename);
68void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
69				   struct btrfs_inode *dir);
70/* Return values for btrfs_log_new_name() */
71enum {
72	BTRFS_DONT_NEED_TRANS_COMMIT,
73	BTRFS_NEED_TRANS_COMMIT,
74	BTRFS_DONT_NEED_LOG_SYNC,
75	BTRFS_NEED_LOG_SYNC,
76};
77int btrfs_log_new_name(struct btrfs_trans_handle *trans,
78			struct btrfs_inode *inode, struct btrfs_inode *old_dir,
79			struct dentry *parent,
80			bool sync_log, struct btrfs_log_ctx *ctx);
81
82#endif