/**
 * @file
 * Simple mount point manager
 * ==========================
 *
 * Add up to MAX_MOUNTS (as defined in kernel.h) mounts and use
 * mount_file_open() and mount_read_dir() to transparently 
 * be dispatch the underlying commands to them based on the supplied paths.
 *
 * Mount directories should exist on root direcotry '/'
 */

#ifndef MOUNT_H
#define MOUNT_H

#include <stdint.h>
#include "interface/fs.h" // fs_dirent for read_dir
#include "fd.h" // file descriptor returned by open

/** the possible values for mount_struct.type */
enum MOUNT_TYPE{
    MOUNT_TYPE_EXT2	=	1,
    MOUNT_TYPE_PIPES	=	2,
    MOUNT_TYPE_SYS	=	3
};

/** struct telling all we need about a single mountpoint */
typedef struct mount_struct
{
    uint32_t type;    // MOUNT_TYPE

    char path[256];   // where are we mounted (provide leading and trailing slash!)

    fd   (*mount_file_open)(struct mount_struct*, char *path);
    int  (*mount_read_dir) (struct mount_struct*, char *path, fs_dirent *dirs, uint32_t *pos);

    void *data; //opaque data

}mount;

/** dumps mount info to klog */
void mount_dump();

/** adds a new mountpoints */
void mount_add(mount mnt);

/** dispatchers to according mount points */
fd mount_file_open(char *path);

/** TODO: should use fd number instead of PATH on each call*/
int  mount_read_dir (char *path, fs_dirent *dirs, uint32_t *pos);

/** sysfs interface */
void mount_sysfs(ringbuffer *r, void (*f)(ringbuffer *r,char *fmt, ...));

#endif