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 "messages.h"
10 #include "ctree.h"
11 #include "transaction.h"
12
13 /* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
14 #define BTRFS_NO_LOG_SYNC 256
15
16 /*
17 * We can't use the tree log for whatever reason, force a transaction commit.
18 * We use a negative value because there are functions through the logging code
19 * that need to return an error (< 0 value), false (0) or true (1). Any negative
20 * value will do, as it will cause the log to be marked for a full sync.
21 */
22 #define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
23
24 struct btrfs_log_ctx {
25 int log_ret;
26 int log_transid;
27 bool log_new_dentries;
28 bool logging_new_name;
29 bool logging_new_delayed_dentries;
30 /* Indicate if the inode being logged was logged before. */
31 bool logged_before;
32 struct inode *inode;
33 struct list_head list;
34 /* Only used for fast fsyncs. */
35 struct list_head ordered_extents;
36 struct list_head conflict_inodes;
37 int num_conflict_inodes;
38 bool logging_conflict_inodes;
39 };
40
btrfs_init_log_ctx(struct btrfs_log_ctx * ctx,struct inode * inode)41 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
42 struct inode *inode)
43 {
44 ctx->log_ret = 0;
45 ctx->log_transid = 0;
46 ctx->log_new_dentries = false;
47 ctx->logging_new_name = false;
48 ctx->logging_new_delayed_dentries = false;
49 ctx->logged_before = false;
50 ctx->inode = inode;
51 INIT_LIST_HEAD(&ctx->list);
52 INIT_LIST_HEAD(&ctx->ordered_extents);
53 INIT_LIST_HEAD(&ctx->conflict_inodes);
54 ctx->num_conflict_inodes = 0;
55 ctx->logging_conflict_inodes = false;
56 }
57
btrfs_release_log_ctx_extents(struct btrfs_log_ctx * ctx)58 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
59 {
60 struct btrfs_ordered_extent *ordered;
61 struct btrfs_ordered_extent *tmp;
62
63 ASSERT(inode_is_locked(ctx->inode));
64
65 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
66 list_del_init(&ordered->log_list);
67 btrfs_put_ordered_extent(ordered);
68 }
69 }
70
btrfs_set_log_full_commit(struct btrfs_trans_handle * trans)71 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
72 {
73 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
74 }
75
btrfs_need_log_full_commit(struct btrfs_trans_handle * trans)76 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
77 {
78 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
79 trans->transid;
80 }
81
82 int btrfs_sync_log(struct btrfs_trans_handle *trans,
83 struct btrfs_root *root, struct btrfs_log_ctx *ctx);
84 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
85 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
86 struct btrfs_fs_info *fs_info);
87 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
88 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
89 struct dentry *dentry,
90 struct btrfs_log_ctx *ctx);
91 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
92 struct btrfs_root *root,
93 const struct fscrypt_str *name,
94 struct btrfs_inode *dir, u64 index);
95 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
96 struct btrfs_root *root,
97 const struct fscrypt_str *name,
98 struct btrfs_inode *inode, u64 dirid);
99 void btrfs_end_log_trans(struct btrfs_root *root);
100 void btrfs_pin_log_trans(struct btrfs_root *root);
101 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
102 struct btrfs_inode *dir, struct btrfs_inode *inode,
103 bool for_rename);
104 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
105 struct btrfs_inode *dir);
106 void btrfs_log_new_name(struct btrfs_trans_handle *trans,
107 struct dentry *old_dentry, struct btrfs_inode *old_dir,
108 u64 old_dir_index, struct dentry *parent);
109
110 #endif
111