Vhex is a kernel which provide development and retro ingenierie platform for the Casio's OS
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Vhex-kernel/include/kernel/fs/filesystem.h

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2.3 KiB

#ifndef __KERNEL_FS_FS_H__
# define __KERNEL_FS_FS_H__
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
// FS flags
#define FS_RDWR (0x01)
#define FS_RDONLY (0x02)
#define FS_NO_DEVICE (0x02)
// Internal file operations
struct file_system_operations
{
void *(*mount)(void);
int (*umount)(void);
};
// Internal super block operations
// TODO
/*struct super_operations
{
// Inode management part.
// void *(*alloc_inode)(struct super_block *sb);
// void (*destroy_inode)(void *inode);
// Internal FS primitives
// int (*sync_fs)(struct super_block *sb, int wait);
// int (*statfs) (struct dentry *, struct kstatfs *);
};*/
// Internal Inode operations
struct inode_operations
{
// Inode walk part.
void *(*find_next_sibling)(void *inode);
void *(*find_first_child)(void *inode);
void *(*find_parent)(void *inode);
// Inode memory part.
void *(*create)(void *parent_inode, char const *name, mode_t mode);
void *(*mkdir)(void *parent_inode, char const *name, mode_t mode);
int (*rmdir)(void *inode);
int (*rename)(void *indde, char const *name);
// Inode informartions part.
int (*get_name)(void *inode, char *buf, size_t count);
mode_t (*get_mode)(void *inode);
};
struct file_operations
{
ssize_t (*read)(void *inode, void *buf, size_t count, off_t pos);
ssize_t (*write)(void *inode, const void *buf, size_t count, off_t pos);
void (*ioctl)(void *inode, uint32_t cmd, ...);
};
// Based on UNIX Kernel 2.6.39
struct file_system_type
{
const char *fs_name;
uint8_t fs_flags;
struct file_system_operations filesystem_operations;
struct file_operations file_operations;
struct inode_operations inode_operations;
struct file_system_type *next;
};
#define VFS_DENTRY_NAME_LENGHT 24
// Used to walk into VFS
struct dentry
{
// File name.
char name[VFS_DENTRY_NAME_LENGHT];
// Internal inode
void *inode;
// Internal counter used by opne() and close()
uint32_t counter;
// Internal file informations
mode_t mode;
// Linked list
struct dentry *parent;
struct dentry *child;
struct dentry *next;
// Mount point
struct {
void *inode;
struct file_operations *file_op;
struct inode_operations *inode_op;
} mnt;
// Internal dentry openrations
struct {
struct file_operations *file_op;
struct inode_operations *inode_op;
} dentry_op;
};
#endif /*__KERNEL_FS_FS_H__*/