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#ifndef FS_H
#define FS_H
#include <stddef.h>
#include <stdbool.h>
#include <com32.h>
#include "core.h"
#include "disk.h"
/*
* Maximum number of open files. This is *currently* constrained by the
* fact that PXE needs to be able to fit all its packet buffers into a
* 64K segment; this should be fixed by moving the packet buffers to high
* memory.
*/
#define MAX_OPEN_LG2 5
#define MAX_OPEN (1 << MAX_OPEN_LG2)
#define FILENAME_MAX_LG2 8
#define FILENAME_MAX (1 << FILENAME_MAX_LG2)
struct fs_info {
const struct fs_ops *fs_ops;
struct device *fs_dev;
};
struct open_file_t; /* Filesystem private structure */
struct file {
struct open_file_t *open_file; /* Filesystem private data */
struct fs_info *fs;
uint32_t file_len;
};
enum fs_flags {
FS_NODEV = 1,
};
struct fs_ops {
/* in fact, we use fs_ops structure to find the right fs */
const char *fs_name;
enum fs_flags fs_flags;
int (*fs_init)(struct fs_info *);
void (*searchdir)(char *, struct file *);
uint32_t (*getfssec)(struct file *, char *, int, bool *);
void (*close_file)(struct file *);
void (*mangle_name)(char *, const char *);
void (*unmangle_name)(char *, const char *);
void (*load_config)(com32sys_t *);
};
enum dev_type {CHS, EDD};
/*
* Generic functions that filesystem drivers may choose to use
*/
void generic_mangle_name(char *, const char *);
/*
* Struct device contains:
* the pointer points to the disk structure,
* the cache stuff.
*/
struct device {
struct disk *disk;
/* the cache stuff */
char* cache_data;
void* cache_head;
uint16_t cache_block_size;
uint16_t cache_entries;
uint32_t cache_size;
};
/*
* Our definition of "not whitespace"
*/
static inline bool not_whitespace(char c)
{
return (unsigned char)c > ' ';
}
#endif /* FS_H */
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