1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
#ifndef MELVIX_VFS_H
#define MELVIX_VFS_H
#include <stdint.h>
#define MAX_NAME_LENGTH 128
enum node_type {
FILE_NODE = 1,
DIR_NODE,
CHAR_DEV_NODE,
BLOCK_DEV_NODE,
PIPE_NODE,
SYMLINK_NODE,
MOUNTPOINT_NODE = 8
};
struct fs_node;
struct dirent;
typedef uint32_t (*read)(struct fs_node *, uint32_t, uint32_t, char *);
typedef uint32_t (*write)(struct fs_node *, uint32_t, uint32_t, char *);
typedef void (*open)(struct fs_node *);
typedef void (*close)(struct fs_node *);
typedef struct dirent *(*read_dir)(struct fs_node *, uint32_t);
typedef struct fs_node *(*find_dir)(struct fs_node *, char *);
struct fs_node {
char name[MAX_NAME_LENGTH];
uint32_t length;
uint32_t inode;
uint32_t permissions;
uint32_t uid;
uint32_t gid;
enum node_type type;
struct fs_node *node_ptr;
void *impl;
read read;
write write;
open open;
close close;
read_dir read_dir;
find_dir find_dir;
};
struct dirent {
char name[MAX_NAME_LENGTH];
uint32_t inode;
};
extern struct fs_node *fs_root;
uint32_t fs_read(struct fs_node *node, uint32_t offset, uint32_t size, char *buf);
uint32_t fs_write(struct fs_node *node, uint32_t offset, uint32_t size, char *buf);
void fs_open(struct fs_node *node);
void fs_close(struct fs_node *node);
struct dirent *fs_read_dir(struct fs_node *node, uint32_t index);
struct fs_node *fs_find_dir(struct fs_node *node, char *name);
#endif
|
