1 #ifndef LINUX_UMSDOS_FS_H
2 #define LINUX_UMSDOS_FS_H
5 /*#define UMS_DEBUG 1 // define for check_* functions */
6 /*#define UMSDOS_DEBUG 1*/
7 #define UMSDOS_PARANOIA 1
9 #define UMSDOS_VERSION 0
10 #define UMSDOS_RELEASE 4
12 #define UMSDOS_ROOT_INO 1
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
20 #ifndef _LINUX_TYPES_H
21 #include <linux/types.h>
23 #ifndef _LINUX_LIMITS_H
24 #include <linux/limits.h>
26 #ifndef _LINUX_DIRENT_H
27 #include <linux/dirent.h>
29 #ifndef _LINUX_IOCTL_H
30 #include <linux/ioctl.h>
35 /* #Specification: convention / PRINTK Printk and printk
36 * Here is the convention for the use of printk inside fs/umsdos
38 * printk carry important message (error or status).
39 * Printk is for debugging (it is a macro defined at the beginning of
41 * PRINTK is a nulled Printk macro.
43 * This convention makes the source easier to read, and Printk easier
48 # define Printk(x) printk x
52 #endif /* __KERNEL__ */
55 struct umsdos_fake_info {
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[] */
83 #define UMSDOS_HIDDEN 1 /* Never show this entry in directory search */
84 #define UMSDOS_HLINK 2 /* It is a (pseudo) hard link */
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.
92 #define UMSDOS_REC_SIZE 64
94 /* Translation between MSDOS name and UMSDOS name */
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
105 int recsize; /* Record size needed to store entry */
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
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 */
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. */
126 #define UMSDOS_RENAME_DOS _IO(0x04,220) /* rename a file/directory in the DOS
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
142 unsigned long st_dev;
143 ino_t st_ino; /* used */
144 umode_t st_mode; /* used */
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;
161 char version, release;
164 /* Different macros to access struct umsdos_dirent */
165 #define EDM_ENTRY_ISUSED(e) ((e)->name_len!=0)
170 #include <linux/fs.h>
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;
178 #include <linux/umsdos_fs.p>
180 #endif /* __KERNEL__ */