New upstream version 1.2.0

[sven/exfatprogs.git] / include / exfat_dir.h

diff --git a/include/exfat_dir.h b/include/exfat_dir.h
new file mode 100644 (file)
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