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