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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 "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 /* Indicate if the inode being logged was logged before. */
21 bool logged_before;
22 /* Tracks the last logged dir item/index key offset. */
23 u64 last_dir_item_offset;
24 struct inode *inode;
25 struct list_head list;
26 /* Only used for fast fsyncs. */
27 struct list_head ordered_extents;
28};
29
30static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
31 struct inode *inode)
32{
33 ctx->log_ret = 0;
34 ctx->log_transid = 0;
35 ctx->log_new_dentries = false;
36 ctx->logging_new_name = false;
37 ctx->logged_before = false;
38 ctx->inode = inode;
39 INIT_LIST_HEAD(&ctx->list);
40 INIT_LIST_HEAD(&ctx->ordered_extents);
41}
42
43static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
44{
45 struct btrfs_ordered_extent *ordered;
46 struct btrfs_ordered_extent *tmp;
47
48 ASSERT(inode_is_locked(ctx->inode));
49
50 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
51 list_del_init(&ordered->log_list);
52 btrfs_put_ordered_extent(ordered);
53 }
54}
55
56static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
57{
58 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
59}
60
61static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
62{
63 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
64 trans->transid;
65}
66
67int btrfs_sync_log(struct btrfs_trans_handle *trans,
68 struct btrfs_root *root, struct btrfs_log_ctx *ctx);
69int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
70int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
71 struct btrfs_fs_info *fs_info);
72int btrfs_recover_log_trees(struct btrfs_root *tree_root);
73int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
74 struct dentry *dentry,
75 struct btrfs_log_ctx *ctx);
76void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
77 struct btrfs_root *root,
78 const char *name, int name_len,
79 struct btrfs_inode *dir, u64 index);
80void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
81 struct btrfs_root *root,
82 const char *name, int name_len,
83 struct btrfs_inode *inode, u64 dirid);
84void btrfs_end_log_trans(struct btrfs_root *root);
85void btrfs_pin_log_trans(struct btrfs_root *root);
86void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
87 struct btrfs_inode *dir, struct btrfs_inode *inode,
88 int for_rename);
89void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
90 struct btrfs_inode *dir);
91void btrfs_log_new_name(struct btrfs_trans_handle *trans,
92 struct dentry *old_dentry, struct btrfs_inode *old_dir,
93 u64 old_dir_index, struct dentry *parent);
94
95#endif