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  /* __KERNEL__ */
  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         __kernel_uid_t uid;     /* Owner user id */
  69         __kernel_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         unsigned short rdev;    /* major and minor of a device special file */
  74         umode_t mode;           /* Standard UNIX permissions bits + type of */
  75         char spare[12];         /* unused bytes for future extensions */
  76                                 /* file, see linux/stat.h */
  77         char name[UMSDOS_MAXNAME];      /* Not '\0' terminated */
  78                                 /* but '\0' padded, so it will allow */
  79                                 /* for adding news fields in this record */
  80                                 /* by reducing the size of name[] */
  81 };
  82
  83 #define UMSDOS_HIDDEN   1       /* Never show this entry in directory search */
  84 #define UMSDOS_HLINK    2       /* It is a (pseudo) hard link */
  85
  86 /* #Specification: EMD file / record size
  87  * Entry are 64 bytes wide in the EMD file. It allows for a 30 characters
  88  * name. If a name is longer, contiguous entries are allocated. So a
  89  * umsdos_dirent may span multiple records.
  90  */
  91
  92 #define UMSDOS_REC_SIZE         64
  93
  94 /* Translation between MSDOS name and UMSDOS name */
  95
  96 struct umsdos_info {
  97         int msdos_reject;       /* Tell if the file name is invalid for MSDOS */
  98                                 /* See umsdos_parse */
  99         struct umsdos_fake_info fake;
 100         struct umsdos_dirent entry;
 101         off_t f_pos;            /* offset of the entry in the EMD file
 102                                  * or offset where the entry may be store
 103                                  * if it is a new entry
 104                                  */
 105         int recsize;            /* Record size needed to store entry */
 106 };
 107
 108 /* Definitions for ioctl (number randomly chosen)
 109  * The next ioctl commands operate only on the DOS directory
 110  * The file umsdos_progs/umsdosio.c contain a string table
 111  * based on the order of those definition. Keep it in sync
 112  */
 113 #define UMSDOS_READDIR_DOS _IO(0x04,210)        /* Do a readdir of the DOS directory */
 114 #define UMSDOS_UNLINK_DOS  _IO(0x04,211)        /* Erase in the DOS directory only */
 115 #define UMSDOS_RMDIR_DOS   _IO(0x04,212)        /* rmdir in the DOS directory only */
 116 #define UMSDOS_STAT_DOS    _IO(0x04,213)        /* Get info about a file */
 117
 118 /* The next ioctl commands operate only on the EMD file */
 119 #define UMSDOS_CREAT_EMD   _IO(0x04,214)        /* Create a file */
 120 #define UMSDOS_UNLINK_EMD  _IO(0x04,215)        /* unlink (rmdir) a file */
 121 #define UMSDOS_READDIR_EMD _IO(0x04,216)        /* read the EMD file only. */
 122 #define UMSDOS_GETVERSION  _IO(0x04,217)        /* Get the release number of UMSDOS */
 123 #define UMSDOS_INIT_EMD    _IO(0x04,218)        /* Create the EMD file if not there */
 124 #define UMSDOS_DOS_SETUP   _IO(0x04,219)        /* Set the defaults of the MS-DOS driver. */
 125
 126 #define UMSDOS_RENAME_DOS  _IO(0x04,220)        /* rename a file/directory in the DOS
 127                                                  * directory only */
 128 struct umsdos_ioctl {
 129         struct dirent dos_dirent;
 130         struct umsdos_dirent umsdos_dirent;
 131         /* The following structure is used to exchange some data with
 132          * utilities (umsdos_progs/util/umsdosio.c). The first releases
 133          * were using struct stat from "sys/stat.h". This was causing
 134          * some problem for cross compilation of the kernel.
 135          * Since I am not really using the structure stat, but only
 136          * some fields of it, I have decided to replicate the structure
 137          * here for compatibility with the binaries out there.
 138          * FIXME PTW 1998, this has probably changed
 139          */
 140
 141         struct {
 142                 unsigned long st_dev;
 143                 ino_t st_ino;                   /* used */
 144                 umode_t st_mode;                /* used */
 145                 nlink_t st_nlink;
 146                 __kernel_uid_t st_uid;
 147                 __kernel_gid_t st_gid;
 148                 unsigned long st_rdev;
 149                 off_t st_size;                  /* used */
 150                 unsigned long st_blksize;
 151                 unsigned long st_blocks;
 152                 time_t st_atime;                /* used */
 153                 unsigned long __unused1;
 154                 time_t st_mtime;                /* used */
 155                 unsigned long __unused2;
 156                 time_t st_ctime;                /* used */
 157                 unsigned long __unused3;
 158                 uid_t st_uid32;
 159                 gid_t st_gid32;
 160         } stat;
 161         char version, release;
 162 };
 163
 164 /* Different macros to access struct umsdos_dirent */
 165 #define EDM_ENTRY_ISUSED(e) ((e)->name_len!=0)
 166
 167 #ifdef __KERNEL__
 168
 169 #ifndef LINUX_FS_H
 170 #include <linux/fs.h>
 171 #endif
 172
 173 extern struct inode_operations umsdos_dir_inode_operations;
 174 extern struct inode_operations umsdos_rdir_inode_operations;
 175 extern struct file_operations umsdos_dir_operations;
 176 extern struct file_operations umsdos_rdir_operations;
 177
 178 #include <linux/umsdos_fs.p>
 179
 180 #endif                          /* __KERNEL__ */
 181
 182 #endif