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
25struct btrfs_log_ctx {
26	int log_ret;
27	int log_transid;
 
 
 
28	struct list_head list;
 
 
29};
30
31static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx)
 
32{
33	ctx->log_ret = 0;
34	ctx->log_transid = 0;
 
 
 
35	INIT_LIST_HEAD(&ctx->list);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
36}
37
38int btrfs_sync_log(struct btrfs_trans_handle *trans,
39		   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
40int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
41int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
42			     struct btrfs_fs_info *fs_info);
43int btrfs_recover_log_trees(struct btrfs_root *tree_root);
44int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
45			  struct btrfs_root *root, struct dentry *dentry,
46			  struct btrfs_log_ctx *ctx);
47int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
48				 struct btrfs_root *root,
49				 const char *name, int name_len,
50				 struct inode *dir, u64 index);
51int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
52			       struct btrfs_root *root,
53			       const char *name, int name_len,
54			       struct inode *inode, u64 dirid);
55void btrfs_end_log_trans(struct btrfs_root *root);
56int btrfs_pin_log_trans(struct btrfs_root *root);
57void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
58			     struct inode *dir, struct inode *inode,
59			     int for_rename);
60int btrfs_log_new_name(struct btrfs_trans_handle *trans,
61			struct inode *inode, struct inode *old_dir,
 
 
62			struct dentry *parent);
 
63#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	bool logging_new_name;
20	struct inode *inode;
21	struct list_head list;
22	/* Only used for fast fsyncs. */
23	struct list_head ordered_extents;
24};
25
26static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
27				      struct inode *inode)
28{
29	ctx->log_ret = 0;
30	ctx->log_transid = 0;
31	ctx->log_new_dentries = false;
32	ctx->logging_new_name = false;
33	ctx->inode = inode;
34	INIT_LIST_HEAD(&ctx->list);
35	INIT_LIST_HEAD(&ctx->ordered_extents);
36}
37
38static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
39{
40	struct btrfs_ordered_extent *ordered;
41	struct btrfs_ordered_extent *tmp;
42
43	ASSERT(inode_is_locked(ctx->inode));
44
45	list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
46		list_del_init(&ordered->log_list);
47		btrfs_put_ordered_extent(ordered);
48	}
49}
50
51static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
52{
53	WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
54}
55
56static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
57{
58	return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
59		trans->transid;
60}
61
62int btrfs_sync_log(struct btrfs_trans_handle *trans,
63		   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
64int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
65int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
66			     struct btrfs_fs_info *fs_info);
67int btrfs_recover_log_trees(struct btrfs_root *tree_root);
68int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
69			  struct dentry *dentry,
70			  struct btrfs_log_ctx *ctx);
71int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
72				 struct btrfs_root *root,
73				 const char *name, int name_len,
74				 struct btrfs_inode *dir, u64 index);
75int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
76			       struct btrfs_root *root,
77			       const char *name, int name_len,
78			       struct btrfs_inode *inode, u64 dirid);
79void btrfs_end_log_trans(struct btrfs_root *root);
80void btrfs_pin_log_trans(struct btrfs_root *root);
81void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
82			     struct btrfs_inode *dir, struct btrfs_inode *inode,
83			     int for_rename);
84void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
85				   struct btrfs_inode *dir);
86void btrfs_log_new_name(struct btrfs_trans_handle *trans,
87			struct btrfs_inode *inode, struct btrfs_inode *old_dir,
88			struct dentry *parent);
89
90#endif