New upstream version 1.2.0

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

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