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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 <linux/list.h>
10#include <linux/fs.h>
11#include "messages.h"
12#include "ctree.h"
13#include "transaction.h"
14
15struct inode;
16struct dentry;
17struct btrfs_ordered_extent;
18struct btrfs_root;
19struct btrfs_trans_handle;
20
21/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
22#define BTRFS_NO_LOG_SYNC 256
23
24/*
25 * We can't use the tree log for whatever reason, force a transaction commit.
26 * We use a negative value because there are functions through the logging code
27 * that need to return an error (< 0 value), false (0) or true (1). Any negative
28 * value will do, as it will cause the log to be marked for a full sync.
29 */
30#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
31
32struct btrfs_log_ctx {
33 int log_ret;
34 int log_transid;
35 bool log_new_dentries;
36 bool logging_new_name;
37 bool logging_new_delayed_dentries;
38 /* Indicate if the inode being logged was logged before. */
39 bool logged_before;
40 struct btrfs_inode *inode;
41 struct list_head list;
42 /* Only used for fast fsyncs. */
43 struct list_head ordered_extents;
44 struct list_head conflict_inodes;
45 int num_conflict_inodes;
46 bool logging_conflict_inodes;
47 /*
48 * Used for fsyncs that need to copy items from the subvolume tree to
49 * the log tree (full sync flag set or copy everything flag set) to
50 * avoid allocating a temporary extent buffer while holding a lock on
51 * an extent buffer of the subvolume tree and under the log transaction.
52 * Also helps to avoid allocating and freeing a temporary extent buffer
53 * in case we need to process multiple leaves from the subvolume tree.
54 */
55 struct extent_buffer *scratch_eb;
56};
57
58void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct btrfs_inode *inode);
59void btrfs_init_log_ctx_scratch_eb(struct btrfs_log_ctx *ctx);
60void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx);
61
62static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
63{
64 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
65}
66
67static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
68{
69 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
70 trans->transid;
71}
72
73int btrfs_sync_log(struct btrfs_trans_handle *trans,
74 struct btrfs_root *root, struct btrfs_log_ctx *ctx);
75int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
76int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
77 struct btrfs_fs_info *fs_info);
78int btrfs_recover_log_trees(struct btrfs_root *tree_root);
79int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
80 struct dentry *dentry,
81 struct btrfs_log_ctx *ctx);
82void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
83 struct btrfs_root *root,
84 const struct fscrypt_str *name,
85 struct btrfs_inode *dir, u64 index);
86void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
87 struct btrfs_root *root,
88 const struct fscrypt_str *name,
89 struct btrfs_inode *inode, u64 dirid);
90void btrfs_end_log_trans(struct btrfs_root *root);
91void btrfs_pin_log_trans(struct btrfs_root *root);
92void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
93 struct btrfs_inode *dir, struct btrfs_inode *inode,
94 bool for_rename);
95void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
96 struct btrfs_inode *dir);
97void btrfs_record_new_subvolume(const struct btrfs_trans_handle *trans,
98 struct btrfs_inode *dir);
99void btrfs_log_new_name(struct btrfs_trans_handle *trans,
100 struct dentry *old_dentry, struct btrfs_inode *old_dir,
101 u64 old_dir_index, struct dentry *parent);
102
103#endif