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#ifndef LINUX_UMSDOS_FS_H
#define LINUX_UMSDOS_FS_H


/*#define UMS_DEBUG 1   // define for check_* functions */
/*#define UMSDOS_DEBUG 1*/
#define UMSDOS_PARANOIA 1

#define UMSDOS_VERSION  0
#define UMSDOS_RELEASE  4

#define UMSDOS_ROOT_INO 1

/* This is the file acting as a directory extension */
#define UMSDOS_EMD_FILE         "--linux-.---"
#define UMSDOS_EMD_NAMELEN      12
#define UMSDOS_PSDROOT_NAME     "linux"
#define UMSDOS_PSDROOT_LEN      5

#ifndef _LINUX_TYPES_H
#include <linux/types.h>
#endif
#ifndef _LINUX_LIMITS_H
#include <linux/limits.h>
#endif
#ifndef _LINUX_DIRENT_H
#include <linux/dirent.h>
#endif
#ifndef _LINUX_IOCTL_H
#include <linux/ioctl.h>
#endif


#ifdef __KERNEL__
/* #Specification: convention / PRINTK Printk and printk
 * Here is the convention for the use of printk inside fs/umsdos
 *
 * printk carry important message (error or status).
 * Printk is for debugging (it is a macro defined at the beginning of
 * most source.
 * PRINTK is a nulled Printk macro.
 *
 * This convention makes the source easier to read, and Printk easier
 * to shut off.
 */

#       define PRINTK(x)
#       ifdef UMSDOS_DEBUG
#               define Printk(x) printk x
#       else
#               define Printk(x)
#       endif
#endif  /* __KERNEL__ */


struct umsdos_fake_info {
        char fname[13];
        int len;
};

#define UMSDOS_MAXNAME  220
/* This structure is 256 bytes large, depending on the name, only part */
/* of it is written to disk */
/* nice though it would be, I can't change this and preserve backward compatibility */
struct umsdos_dirent {
        unsigned char name_len; /* if == 0, then this entry is not used */
        unsigned char flags;    /* UMSDOS_xxxx */
        unsigned short nlink;   /* How many hard links point to this entry */
        __kernel_uid_t uid;     /* Owner user id */
        __kernel_gid_t gid;     /* Group id */
        time_t atime;           /* Access time */
        time_t mtime;           /* Last modification time */
        time_t ctime;           /* Creation time */
        unsigned short rdev;    /* major and minor of a device special file */
        umode_t mode;           /* Standard UNIX permissions bits + type of */
        char spare[12];         /* unused bytes for future extensions */
                                /* file, see linux/stat.h */
        char name[UMSDOS_MAXNAME];      /* Not '\0' terminated */
                                /* but '\0' padded, so it will allow */
                                /* for adding news fields in this record */
                                /* by reducing the size of name[] */
};

#define UMSDOS_HIDDEN   1       /* Never show this entry in directory search */
#define UMSDOS_HLINK    2       /* It is a (pseudo) hard link */

/* #Specification: EMD file / record size
 * Entry are 64 bytes wide in the EMD file. It allows for a 30 characters
 * name. If a name is longer, contiguous entries are allocated. So a
 * umsdos_dirent may span multiple records.
 */

 
#define UMSDOS_REC_SIZE         64

/* Translation between MSDOS name and UMSDOS name */

struct umsdos_info {
        int msdos_reject;       /* Tell if the file name is invalid for MSDOS */
                                /* See umsdos_parse */
        struct umsdos_fake_info fake;
        struct umsdos_dirent entry;
        off_t f_pos;            /* offset of the entry in the EMD file
                                 * or offset where the entry may be store
                                 * if it is a new entry
                                 */

        int recsize;            /* Record size needed to store entry */
};

/* Definitions for ioctl (number randomly chosen)
 * The next ioctl commands operate only on the DOS directory
 * The file umsdos_progs/umsdosio.c contain a string table
 * based on the order of those definition. Keep it in sync
 */

#define UMSDOS_READDIR_DOS _IO(0x04,210)        /* Do a readdir of the DOS directory */
#define UMSDOS_UNLINK_DOS  _IO(0x04,211)        /* Erase in the DOS directory only */
#define UMSDOS_RMDIR_DOS   _IO(0x04,212)        /* rmdir in the DOS directory only */
#define UMSDOS_STAT_DOS    _IO(0x04,213)        /* Get info about a file */

/* The next ioctl commands operate only on the EMD file */
#define UMSDOS_CREAT_EMD   _IO(0x04,214)        /* Create a file */
#define UMSDOS_UNLINK_EMD  _IO(0x04,215)        /* unlink (rmdir) a file */
#define UMSDOS_READDIR_EMD _IO(0x04,216)        /* read the EMD file only. */
#define UMSDOS_GETVERSION  _IO(0x04,217)        /* Get the release number of UMSDOS */
#define UMSDOS_INIT_EMD    _IO(0x04,218)        /* Create the EMD file if not there */
#define UMSDOS_DOS_SETUP   _IO(0x04,219)        /* Set the defaults of the MS-DOS driver. */

#define UMSDOS_RENAME_DOS  _IO(0x04,220)        /* rename a file/directory in the DOS
                                                 * directory only */
struct umsdos_ioctl {
        struct dirent dos_dirent;
        struct umsdos_dirent umsdos_dirent;
        /* The following structure is used to exchange some data with
         * utilities (umsdos_progs/util/umsdosio.c). The first releases
         * were using struct stat from "sys/stat.h". This was causing
         * some problem for cross compilation of the kernel.
         * Since I am not really using the structure stat, but only
         * some fields of it, I have decided to replicate the structure
         * here for compatibility with the binaries out there.
         * FIXME PTW 1998, this has probably changed
         */

       
        struct {
                unsigned long st_dev;
                ino_t st_ino;                   /* used */
                umode_t st_mode;                /* used */
                nlink_t st_nlink;
                __kernel_uid_t st_uid;
                __kernel_gid_t st_gid;
                unsigned long st_rdev;
                off_t st_size;                  /* used */
                unsigned long st_blksize;
                unsigned long st_blocks;
                time_t st_atime;                /* used */
                unsigned long __unused1;
                time_t st_mtime;                /* used */
                unsigned long __unused2;
                time_t st_ctime;                /* used */
                unsigned long __unused3;
                uid_t st_uid32;
                gid_t st_gid32;
        } stat;
        char version, release;
};

/* Different macros to access struct umsdos_dirent */
#define EDM_ENTRY_ISUSED(e) ((e)->name_len!=0)

#ifdef __KERNEL__

#ifndef LINUX_FS_H
#include <linux/fs.h>
#endif

extern struct inode_operations umsdos_dir_inode_operations;
extern struct inode_operations umsdos_rdir_inode_operations;
extern struct file_operations umsdos_dir_operations;
extern struct file_operations umsdos_rdir_operations;

#include <linux/umsdos_fs.p>

#endif                          /* __KERNEL__ */

#endif