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