include/linux/umsdos_fs.h

   1 #ifndef LINUX_UMSDOS_FS_H
   2 #define LINUX_UMSDOS_FS_H
   3
   4
   5 #define UMS_DEBUG 1     /* define for check_* functions */
   6 /*#define UMSDOS_DEBUG 1*/
   7 #define UMSDOS_PARANOIA 1
   8
   9 #define UMSDOS_VERSION  0
  10 #define UMSDOS_RELEASE  4
  11
  12 #define UMSDOS_ROOT_INO 1
  13
  14 /* This is the file acting as a directory extension */
  15 #define UMSDOS_EMD_FILE         "--linux-.---"
  16 #define UMSDOS_EMD_NAMELEN      12
  17 #define UMSDOS_PSDROOT_NAME     "linux"
  18 #define UMSDOS_PSDROOT_LEN      5
  19
  20 #ifndef _LINUX_TYPES_H
  21 #include <linux/types.h>
  22 #endif
  23 #ifndef _LINUX_LIMITS_H
  24 #include <linux/limits.h>
  25 #endif
  26 #ifndef _LINUX_DIRENT_H
  27 #include <linux/dirent.h>
  28 #endif
  29 #ifndef _LINUX_IOCTL_H
  30 #include <linux/ioctl.h>
  31 #endif
  32
  33
  34 #ifdef __KERNEL__
  35 /* #Specification: convention / PRINTK Printk and printk
  36  * Here is the convention for the use of printk inside fs/umsdos
  37  *
  38  * printk carry important message (error or status).
  39  * Printk is for debugging (it is a macro defined at the beginning of
  40  * most source.
  41  * PRINTK is a nulled Printk macro.
  42  *
  43  * This convention makes the source easier to read, and Printk easier
  44  * to shut off.
  45  */
  46 #       define PRINTK(x)
  47 #       ifdef UMSDOS_DEBUG
  48 #               define Printk(x) printk x
  49 #       else
  50 #               define Printk(x)
  51 #       endif
  52 #endif
  53
  54
  55 struct umsdos_fake_info {
  56         char fname[13];
  57         int len;
  58 };
  59
  60 #define UMSDOS_MAXNAME  220
  61 /* This structure is 256 bytes large, depending on the name, only part */
  62 /* of it is written to disk */
  63 /* nice though it would be, I can't change this and preserve backward compatibility */
  64 struct umsdos_dirent {
  65         unsigned char name_len; /* if == 0, then this entry is not used */
  66         unsigned char flags;    /* UMSDOS_xxxx */
  67         unsigned short nlink;   /* How many hard links point to this entry */
  68         uid_t uid;              /* Owner user id */
  69         gid_t gid;              /* Group id */
  70         time_t atime;           /* Access time */
  71         time_t mtime;           /* Last modification time */
  72         time_t ctime;           /* Creation time */
  73         dev_t rdev;             /* major and minor number of a device */
  74                                 /* special file */
  75         umode_t mode;           /* Standard UNIX permissions bits + type of */
  76         char spare[12];         /* unused bytes for future extensions */
  77                                 /* file, see linux/stat.h */
  78         char name[UMSDOS_MAXNAME];      /* Not '\0' terminated */
  79                                 /* but '\0' padded, so it will allow */
  80                                 /* for adding news fields in this record */
  81                                 /* by reducing the size of name[] */
  82 };
  83
  84 #define UMSDOS_HIDDEN   1       /* Never show this entry in directory search */
  85 #define UMSDOS_HLINK    2       /* It is a (pseudo) hard link */
  86
  87 /* #Specification: EMD file / record size
  88  * Entry are 64 bytes wide in the EMD file. It allows for a 30 characters
  89  * name. If a name is longer, contiguous entries are allocated. So a
  90  * umsdos_dirent may span multiple records.
  91  */
  92
  93 #define UMSDOS_REC_SIZE         64
  94
  95 /* Translation between MSDOS name and UMSDOS name */
  96
  97 struct umsdos_info {
  98         int msdos_reject;       /* Tell if the file name is invalid for MSDOS */
  99                                 /* See umsdos_parse */
 100         struct umsdos_fake_info fake;
 101         struct umsdos_dirent entry;
 102         off_t f_pos;            /* offset of the entry in the EMD file
 103                                  * or offset where the entry may be store
 104                                  * if it is a new entry
 105                                  */
 106         int recsize;            /* Record size needed to store entry */
 107 };
 108
 109 /* Definitions for ioctl (number randomly chosen)
 110  * The next ioctl commands operate only on the DOS directory
 111  * The file umsdos_progs/umsdosio.c contain a string table
 112  * based on the order of those definition. Keep it in sync
 113  */
 114 #define UMSDOS_READDIR_DOS _IO(0x04,210)        /* Do a readdir of the DOS directory */
 115 #define UMSDOS_UNLINK_DOS  _IO(0x04,211)        /* Erase in the DOS directory only */
 116 #define UMSDOS_RMDIR_DOS   _IO(0x04,212)        /* rmdir in the DOS directory only */
 117 #define UMSDOS_STAT_DOS    _IO(0x04,213)        /* Get info about a file */
 118
 119 /* The next ioctl commands operate only on the EMD file */
 120 #define UMSDOS_CREAT_EMD   _IO(0x04,214)        /* Create a file */
 121 #define UMSDOS_UNLINK_EMD  _IO(0x04,215)        /* unlink (rmdir) a file */
 122 #define UMSDOS_READDIR_EMD _IO(0x04,216)        /* read the EMD file only. */
 123 #define UMSDOS_GETVERSION  _IO(0x04,217)        /* Get the release number of UMSDOS */
 124 #define UMSDOS_INIT_EMD    _IO(0x04,218)        /* Create the EMD file if not there */
 125 #define UMSDOS_DOS_SETUP   _IO(0x04,219)        /* Set the defaults of the MS-DOS driver. */
 126
 127 #define UMSDOS_RENAME_DOS  _IO(0x04,220)        /* rename a file/directory in the DOS
 128                                                  * directory only */
 129 struct umsdos_ioctl {
 130         struct dirent dos_dirent;
 131         struct umsdos_dirent umsdos_dirent;
 132         /* The following structure is used to exchange some data
 133          * with utilities (umsdos_progs/util/umsdosio.c). The first
 134          * releases were using struct stat from "sys/stat.h". This was
 135          * causing some problem for cross compilation of the kernel
 136          * Since I am not really using the structure stat, but only some field
 137          * of it, I have decided to replicate the structure here
 138          * for compatibility with the binaries out there
 139          * FIXME PTW 1998, this has probably changed
 140          */
 141
 142         struct {
 143                 dev_t st_dev;
 144                 unsigned short __pad1;
 145                 ino_t st_ino;
 146                 umode_t st_mode;
 147                 nlink_t st_nlink;
 148                 uid_t st_uid;
 149                 gid_t st_gid;
 150                 dev_t st_rdev;
 151                 unsigned short __pad2;
 152                 off_t st_size;
 153                 unsigned long st_blksize;
 154                 unsigned long st_blocks;
 155                 time_t st_atime;
 156                 unsigned long __unused1;
 157                 time_t st_mtime;
 158                 unsigned long __unused2;
 159                 time_t st_ctime;
 160                 unsigned long __unused3;
 161                 unsigned long __unused4;
 162                 unsigned long __unused5;
 163         } stat;
 164         char version, release;
 165 };
 166
 167 /* Different macros to access struct umsdos_dirent */
 168 #define EDM_ENTRY_ISUSED(e) ((e)->name_len!=0)
 169
 170 #ifdef __KERNEL__
 171
 172 #ifndef LINUX_FS_H
 173 #include <linux/fs.h>
 174 #endif
 175
 176 extern struct inode_operations umsdos_dir_inode_operations;
 177 extern struct inode_operations umsdos_symlink_inode_operations;
 178 extern int init_umsdos_fs (void);
 179
 180 #include <linux/umsdos_fs.p>
 181
 182 #endif                          /* __KERNEL__ */
 183
 184 #endif