v4.19.13 snapshot.
diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h
new file mode 100644
index 0000000..7ab9bb8
--- /dev/null
+++ b/fs/btrfs/tree-log.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Oracle. All rights reserved.
+ */
+
+#ifndef BTRFS_TREE_LOG_H
+#define BTRFS_TREE_LOG_H
+
+#include "ctree.h"
+#include "transaction.h"
+
+/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
+#define BTRFS_NO_LOG_SYNC 256
+
+struct btrfs_log_ctx {
+ int log_ret;
+ int log_transid;
+ int io_err;
+ bool log_new_dentries;
+ struct inode *inode;
+ struct list_head list;
+};
+
+static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
+ struct inode *inode)
+{
+ ctx->log_ret = 0;
+ ctx->log_transid = 0;
+ ctx->io_err = 0;
+ ctx->log_new_dentries = false;
+ ctx->inode = inode;
+ INIT_LIST_HEAD(&ctx->list);
+}
+
+static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
+ struct btrfs_trans_handle *trans)
+{
+ WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid);
+}
+
+static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
+ struct btrfs_trans_handle *trans)
+{
+ return READ_ONCE(fs_info->last_trans_log_full_commit) ==
+ trans->transid;
+}
+
+int btrfs_sync_log(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_log_ctx *ctx);
+int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
+int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info);
+int btrfs_recover_log_trees(struct btrfs_root *tree_root);
+int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
+ struct dentry *dentry,
+ const loff_t start,
+ const loff_t end,
+ struct btrfs_log_ctx *ctx);
+int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ const char *name, int name_len,
+ struct btrfs_inode *dir, u64 index);
+int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ const char *name, int name_len,
+ struct btrfs_inode *inode, u64 dirid);
+void btrfs_end_log_trans(struct btrfs_root *root);
+int btrfs_pin_log_trans(struct btrfs_root *root);
+void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
+ struct btrfs_inode *dir, struct btrfs_inode *inode,
+ int for_rename);
+void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
+ struct btrfs_inode *dir);
+/* Return values for btrfs_log_new_name() */
+enum {
+ BTRFS_DONT_NEED_TRANS_COMMIT,
+ BTRFS_NEED_TRANS_COMMIT,
+ BTRFS_DONT_NEED_LOG_SYNC,
+ BTRFS_NEED_LOG_SYNC,
+};
+int btrfs_log_new_name(struct btrfs_trans_handle *trans,
+ struct btrfs_inode *inode, struct btrfs_inode *old_dir,
+ struct dentry *parent,
+ bool sync_log, struct btrfs_log_ctx *ctx);
+
+#endif