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#ifndef __FS_H__
#define __FS_H__
#include "types.h"
#define FS_OFFSET 0x1000
#define FS_BLOCKS_SIZE 512
#define FS_BLOCKS_N 8
#define FS_BLOCKS_IND 6
#define INODE_TYPE_FILE 0x0
#define INODE_TYPE_DIR 0x1
#define INODE_TYPE_SLINK 0x2
#define INODE_TYPE_SPECIAL 0x3
#define INODE_META_SIZE 8
/* inode basic structure */
struct fs_inode
{
/* inode meta data */
uint mode :3; // chmod
uint uid :3; // chown
uint type :2; // file, dir, sym-link, special
time_t ctime; // creation time
uint24_t size; // inode size
/* data storage informations */
/* it doesn't allocate memory, virtual size FS_BLOCKS_N */
blk_t blocks[];
};
#define FS_DEV_ROM 0x7f /* 01111111 */
#define FS_DEV_NULL 0x80 /* 10000000 */
#define FS_ROM_SPACE 0x2000 // second rom
#define FS_INO_ROOT 0x0 // first inode
#define FS_INODE_ROOT(inode) {inode.dev = 0xff; inode.inode = 0x0}
#define FS_INODE_NULL(inode) {inode.dev = 0x80; inode.inode = 0x0}
#define FS_USE_ROM(inode) inode.dev == 0x7f
/* get block seek in current device */
devsize_t fs_block(blk_t block);
/* get common inode seek in current device */
/* c_inode must be set first */
/* returns seek at the beginning of blocks field */
devsize_t fs_inode(struct fs_inode *buf);
/* common inode for syscalls */
extern inode_t c_inode;
/* parse a path, absolute or relative to c_inode */
inode_t fs_parse_path(const char *path);
#endif // __FS_H__
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