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