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-rw-r--r--include/exfat_dir.h86
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