spz-lab4/inc/fs.h

#include "config.h"

enum fs_filetype {
	REGULAR,
	DIRECTORY
};

__attribute__((packed))
struct fs_header {
	unsigned char version;
	unsigned int max_inode_count:24;
	unsigned int block_count;
	unsigned int next_extension;
	unsigned int inode_ptrs[(FS_BLOCK_SIZE-sizeof(int)*3) / sizeof(int)];
};

__attribute__((packed))
struct fs_header_extension {
	unsigned int next_extension;
	unsigned int inode_ptrs[(FS_BLOCK_SIZE-sizeof(int)) / sizeof(int)];
};

__attribute__((packed))
struct fs_inode {
	unsigned int ftype:8;
	unsigned int ref_count:24;
	unsigned int size;
	unsigned int next_extension;
	unsigned int blocks[(FS_BLOCK_SIZE-sizeof(int)*3) / sizeof(int)];
};

__attribute__((packed))
struct fs_inode_extension {
	unsigned int next_extension;
	unsigned int blocks[(FS_BLOCK_SIZE-sizeof(int)) / sizeof(int)];
};

__attribute__((packed))
struct fs_directory_record {
	unsigned char fname[60];
	unsigned int inode_no;
};

struct fs_file_description {
	unsigned int inode;
	unsigned int rw_offset;
};

char *fs_get_cwd(void);

int fs_create(void *d);
int fs_ln(void *);
int fs_use(void *d);
int fs_mkfs(void *d);
int fs_ls(void *d);
int fs_la(void *d);
int fs_rm(void *d);
int fs_open(void *d);
int fs_close(void *d);
int fs_allow_write(void *d);
int fs_prohibit_write(void *d);