1 files changed, 86 insertions, 0 deletions
diff --git a/include/exfat_dir.h b/include/exfat_dir.h
new file mode 100644
index 0000000..3bc5b51
--- /dev/null
+++ b/include/exfat_dir.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) 2021 LG Electronics.
+ *
+ *   Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ */
+
+#ifndef _DIR_H_
+#define _DIR_H_
+
+struct exfat;
+struct exfat_inode;
+struct exfat_dentry_loc;
+struct buffer_desc;
+
+struct exfat_de_iter {
+	struct exfat		*exfat;
+	struct exfat_inode	*parent;
+	struct buffer_desc	*buffer_desc;		/* cluster * 2 */
+	__u32			ra_next_clus;
+	unsigned int		ra_begin_offset;
+	unsigned int		ra_partial_size;
+	unsigned int		read_size;		/* cluster size */
+	unsigned int		write_size;		/* sector size */
+	off_t			de_file_offset;
+	off_t			next_read_offset;
+	int			max_skip_dentries;
+#define DOT_NAME_NUM_MAX	9999999
+	unsigned int		dot_name_num;
+};
+
+struct exfat_lookup_filter {
+	struct {
+		uint8_t		type;
+		/* return 0 if matched, return 1 if not matched,
+		 * otherwise return errno
+		 */
+		int		(*filter)(struct exfat_de_iter *iter,
+					  void *param, int *dentry_count);
+		void		*param;
+	} in;
+	struct {
+		struct exfat_dentry	*dentry_set;
+		int			dentry_count;
+		off_t			file_offset;
+		/* device offset where the dentry_set locates, or
+		 * the empty slot locates or EOF if not found.
+		 */
+		off_t			dev_offset;
+	} out;
+};
+
+int exfat_de_iter_init(struct exfat_de_iter *iter, struct exfat *exfat,
+		       struct exfat_inode *dir, struct buffer_desc *bd);
+int exfat_de_iter_get(struct exfat_de_iter *iter,
+		      int ith, struct exfat_dentry **dentry);
+int exfat_de_iter_get_dirty(struct exfat_de_iter *iter,
+			    int ith, struct exfat_dentry **dentry);
+int exfat_de_iter_flush(struct exfat_de_iter *iter);
+int exfat_de_iter_advance(struct exfat_de_iter *iter, int skip_dentries);
+off_t exfat_de_iter_device_offset(struct exfat_de_iter *iter);
+off_t exfat_de_iter_file_offset(struct exfat_de_iter *iter);
+
+int exfat_lookup_dentry_set(struct exfat *exfat, struct exfat_inode *parent,
+			    struct exfat_lookup_filter *filter);
+int exfat_lookup_file(struct exfat *exfat, struct exfat_inode *parent,
+		      const char *name, struct exfat_lookup_filter *filter_out);
+
+int exfat_create_file(struct exfat *exfat, struct exfat_inode *parent,
+		      const char *name, unsigned short attr);
+int exfat_update_file_dentry_set(struct exfat *exfat,
+				 struct exfat_dentry *dset, int dcount,
+				 const char *name,
+				 clus_t start_clu, clus_t ccount);
+int exfat_build_file_dentry_set(struct exfat *exfat, const char *name,
+				unsigned short attr, struct exfat_dentry **dentry_set,
+				int *dentry_count);
+int exfat_add_dentry_set(struct exfat *exfat, struct exfat_dentry_loc *loc,
+			 struct exfat_dentry *dset, int dcount,
+			 bool need_next_loc);
+void exfat_calc_dentry_checksum(struct exfat_dentry *dentry,
+				uint16_t *checksum, bool primary);
+uint16_t exfat_calc_name_hash(struct exfat *exfat,
+			      __le16 *name, int len);
+
+#endif