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
15 struct 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
btrfs_init_log_ctx(struct btrfs_log_ctx * ctx,struct inode * inode)23 static 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
btrfs_set_log_full_commit(struct btrfs_trans_handle * trans)33 static 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
btrfs_need_log_full_commit(struct btrfs_trans_handle * trans)38 static 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
44 int btrfs_sync_log(struct btrfs_trans_handle *trans,
45 struct btrfs_root *root, struct btrfs_log_ctx *ctx);
46 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
47 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
48 struct btrfs_fs_info *fs_info);
49 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
50 int 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);
55 int 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);
59 int 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);
63 void btrfs_end_log_trans(struct btrfs_root *root);
64 void btrfs_pin_log_trans(struct btrfs_root *root);
65 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
66 struct btrfs_inode *dir, struct btrfs_inode *inode,
67 int for_rename);
68 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
69 struct btrfs_inode *dir);
70 /* Return values for btrfs_log_new_name() */
71 enum {
72 BTRFS_DONT_NEED_TRANS_COMMIT,
73 BTRFS_NEED_TRANS_COMMIT,
74 BTRFS_DONT_NEED_LOG_SYNC,
75 BTRFS_NEED_LOG_SYNC,
76 };
77 int 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
83