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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 "messages.h"
10#include "ctree.h"
11#include "transaction.h"
12
13/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
14#define BTRFS_NO_LOG_SYNC 256
15
16/*
17 * We can't use the tree log for whatever reason, force a transaction commit.
18 * We use a negative value because there are functions through the logging code
19 * that need to return an error (< 0 value), false (0) or true (1). Any negative
20 * value will do, as it will cause the log to be marked for a full sync.
21 */
22#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
23
24struct btrfs_log_ctx {
25 int log_ret;
26 int log_transid;
27 bool log_new_dentries;
28 bool logging_new_name;
29 bool logging_new_delayed_dentries;
30 /* Indicate if the inode being logged was logged before. */
31 bool logged_before;
32 struct inode *inode;
33 struct list_head list;
34 /* Only used for fast fsyncs. */
35 struct list_head ordered_extents;
36 struct list_head conflict_inodes;
37 int num_conflict_inodes;
38 bool logging_conflict_inodes;
39};
40
41static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
42 struct inode *inode)
43{
44 ctx->log_ret = 0;
45 ctx->log_transid = 0;
46 ctx->log_new_dentries = false;
47 ctx->logging_new_name = false;
48 ctx->logging_new_delayed_dentries = false;
49 ctx->logged_before = false;
50 ctx->inode = inode;
51 INIT_LIST_HEAD(&ctx->list);
52 INIT_LIST_HEAD(&ctx->ordered_extents);
53 INIT_LIST_HEAD(&ctx->conflict_inodes);
54 ctx->num_conflict_inodes = 0;
55 ctx->logging_conflict_inodes = false;
56}
57
58static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
59{
60 struct btrfs_ordered_extent *ordered;
61 struct btrfs_ordered_extent *tmp;
62
63 ASSERT(inode_is_locked(ctx->inode));
64
65 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
66 list_del_init(&ordered->log_list);
67 btrfs_put_ordered_extent(ordered);
68 }
69}
70
71static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
72{
73 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
74}
75
76static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
77{
78 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
79 trans->transid;
80}
81
82int btrfs_sync_log(struct btrfs_trans_handle *trans,
83 struct btrfs_root *root, struct btrfs_log_ctx *ctx);
84int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
85int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
86 struct btrfs_fs_info *fs_info);
87int btrfs_recover_log_trees(struct btrfs_root *tree_root);
88int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
89 struct dentry *dentry,
90 struct btrfs_log_ctx *ctx);
91void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
92 struct btrfs_root *root,
93 const struct fscrypt_str *name,
94 struct btrfs_inode *dir, u64 index);
95void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
96 struct btrfs_root *root,
97 const struct fscrypt_str *name,
98 struct btrfs_inode *inode, u64 dirid);
99void btrfs_end_log_trans(struct btrfs_root *root);
100void btrfs_pin_log_trans(struct btrfs_root *root);
101void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
102 struct btrfs_inode *dir, struct btrfs_inode *inode,
103 bool for_rename);
104void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
105 struct btrfs_inode *dir);
106void btrfs_log_new_name(struct btrfs_trans_handle *trans,
107 struct dentry *old_dentry, struct btrfs_inode *old_dir,
108 u64 old_dir_index, struct dentry *parent);
109
110#endif
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);
82void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
83 struct inode *dir);
84int btrfs_log_new_name(struct btrfs_trans_handle *trans,
85 struct inode *inode, struct inode *old_dir,
86 struct dentry *parent);
87#endif