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 /* We can't use the tree log for whatever reason, force a transaction commit */
16 #define BTRFS_LOG_FORCE_COMMIT (1)
17
18 struct btrfs_log_ctx {
19 int log_ret;
20 int log_transid;
21 bool log_new_dentries;
22 bool logging_new_name;
23 bool logging_new_delayed_dentries;
24 /* Indicate if the inode being logged was logged before. */
25 bool logged_before;
26 /* Tracks the last logged dir item/index key offset. */
27 u64 last_dir_item_offset;
28 struct inode *inode;
29 struct list_head list;
30 /* Only used for fast fsyncs. */
31 struct list_head ordered_extents;
32 struct list_head conflict_inodes;
33 int num_conflict_inodes;
34 bool logging_conflict_inodes;
35 };
36
btrfs_init_log_ctx(struct btrfs_log_ctx * ctx,struct inode * inode)37 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
38 struct inode *inode)
39 {
40 ctx->log_ret = 0;
41 ctx->log_transid = 0;
42 ctx->log_new_dentries = false;
43 ctx->logging_new_name = false;
44 ctx->logging_new_delayed_dentries = false;
45 ctx->logged_before = false;
46 ctx->inode = inode;
47 INIT_LIST_HEAD(&ctx->list);
48 INIT_LIST_HEAD(&ctx->ordered_extents);
49 INIT_LIST_HEAD(&ctx->conflict_inodes);
50 ctx->num_conflict_inodes = 0;
51 ctx->logging_conflict_inodes = false;
52 }
53
btrfs_release_log_ctx_extents(struct btrfs_log_ctx * ctx)54 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
55 {
56 struct btrfs_ordered_extent *ordered;
57 struct btrfs_ordered_extent *tmp;
58
59 ASSERT(inode_is_locked(ctx->inode));
60
61 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
62 list_del_init(&ordered->log_list);
63 btrfs_put_ordered_extent(ordered);
64 }
65 }
66
btrfs_set_log_full_commit(struct btrfs_trans_handle * trans)67 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
68 {
69 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
70 }
71
btrfs_need_log_full_commit(struct btrfs_trans_handle * trans)72 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
73 {
74 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
75 trans->transid;
76 }
77
78 int btrfs_sync_log(struct btrfs_trans_handle *trans,
79 struct btrfs_root *root, struct btrfs_log_ctx *ctx);
80 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
81 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
82 struct btrfs_fs_info *fs_info);
83 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
84 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
85 struct dentry *dentry,
86 struct btrfs_log_ctx *ctx);
87 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
88 struct btrfs_root *root,
89 const char *name, int name_len,
90 struct btrfs_inode *dir, u64 index);
91 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
92 struct btrfs_root *root,
93 const char *name, int name_len,
94 struct btrfs_inode *inode, u64 dirid);
95 void btrfs_end_log_trans(struct btrfs_root *root);
96 void btrfs_pin_log_trans(struct btrfs_root *root);
97 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
98 struct btrfs_inode *dir, struct btrfs_inode *inode,
99 int for_rename);
100 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
101 struct btrfs_inode *dir);
102 void btrfs_log_new_name(struct btrfs_trans_handle *trans,
103 struct dentry *old_dentry, struct btrfs_inode *old_dir,
104 u64 old_dir_index, struct dentry *parent);
105
106 #endif
107