1 files changed, 88 insertions, 0 deletions
diff --git a/include/exfat_fs.h b/include/exfat_fs.h
new file mode 100644
index 0000000..d35b12c
--- /dev/null
+++ b/include/exfat_fs.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) 2021 LG Electronics.
+ *
+ *   Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+#ifndef _EXFAT_FS_H_
+#define _EXFAT_FS_H_
+
+#include "list.h"
+
+struct exfat_dentry;
+
+struct exfat_inode {
+	struct exfat_inode	*parent;
+	struct list_head	children;
+	struct list_head	sibling;
+	struct list_head	list;
+	clus_t			first_clus;
+	__u16			attr;
+	uint64_t		size;
+	bool			is_contiguous;
+	struct exfat_dentry	*dentry_set;
+	int			dentry_count;
+	off_t			dev_offset;
+	__le16			name[0];	/* only for directory */
+};
+
+#define EXFAT_NAME_MAX			255
+#define NAME_BUFFER_SIZE		((EXFAT_NAME_MAX + 1) * 2)
+
+struct exfat {
+	struct exfat_blk_dev	*blk_dev;
+	struct pbr		*bs;
+	char			volume_label[VOLUME_LABEL_BUFFER_SIZE];
+	struct exfat_inode	*root;
+	struct list_head	dir_list;
+	clus_t			clus_count;
+	unsigned int		clus_size;
+	unsigned int		sect_size;
+	char			*disk_bitmap;
+	char			*alloc_bitmap;
+	char			*ohead_bitmap;
+	clus_t			disk_bitmap_clus;
+	unsigned int		disk_bitmap_size;
+	__u16			*upcase_table;
+	clus_t			start_clu;
+	char			*zero_cluster;
+};
+
+struct exfat_dentry_loc {
+	struct exfat_inode	*parent;
+	off_t			file_offset;
+	off_t			dev_offset;
+};
+
+struct path_resolve_ctx {
+	struct exfat_inode	*ancestors[255];
+	__le16			utf16_path[PATH_MAX + 2];
+	char			local_path[PATH_MAX * MB_LEN_MAX + 1];
+};
+
+struct buffer_desc {
+	__u32		p_clus;
+	unsigned int	offset;
+	char		*buffer;
+	char		*dirty;
+};
+
+struct exfat *exfat_alloc_exfat(struct exfat_blk_dev *blk_dev, struct pbr *bs);
+void exfat_free_exfat(struct exfat *exfat);
+
+struct exfat_inode *exfat_alloc_inode(__u16 attr);
+void exfat_free_inode(struct exfat_inode *node);
+
+void exfat_free_children(struct exfat_inode *dir, bool file_only);
+void exfat_free_file_children(struct exfat_inode *dir);
+void exfat_free_ancestors(struct exfat_inode *child);
+void exfat_free_dir_list(struct exfat *exfat);
+
+int exfat_resolve_path(struct path_resolve_ctx *ctx, struct exfat_inode *child);
+int exfat_resolve_path_parent(struct path_resolve_ctx *ctx,
+			      struct exfat_inode *parent, struct exfat_inode *child);
+
+struct buffer_desc *exfat_alloc_buffer(int count,
+				       unsigned int clu_size, unsigned int sect_size);
+void exfat_free_buffer(struct buffer_desc *bd, int count);
+#endif