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1633 |
jcastillo |
#ifndef LINUX_UMSDOS_FS_H
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#define LINUX_UMSDOS_FS_H
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#define UMSDOS_VERSION 0
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#define UMSDOS_RELEASE 4
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/* This is the file acting as a directory extension */
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#define UMSDOS_EMD_FILE "--linux-.---"
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#define UMSDOS_EMD_NAMELEN 12
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#define UMSDOS_PSDROOT_NAME "linux"
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#define UMSDOS_PSDROOT_LEN 5
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#ifndef _LINUX_TYPES_H
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#include <linux/types.h>
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#endif
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#ifndef _LINUX_DIRENT_H
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#include <linux/dirent.h>
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#endif
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#ifndef _LINUX_IOCTL_H
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#include <linux/ioctl.h>
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#endif
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struct umsdos_fake_info {
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char fname[13];
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int len;
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};
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#define UMSDOS_MAXNAME 220
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/* This structure is 256 bytes large, depending on the name, only part */
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/* of it is written to disk */
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struct umsdos_dirent {
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unsigned char name_len; /* if == 0, then this entry is not used */
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unsigned char flags; /* UMSDOS_xxxx */
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unsigned short nlink; /* How many hard links point to this entry */
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uid_t uid; /* Owner user id */
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gid_t gid; /* Group id */
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time_t atime; /* Access time */
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time_t mtime; /* Last modification time */
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time_t ctime; /* Creation time */
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dev_t rdev; /* major and minor number of a device */
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/* special file */
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umode_t mode; /* Standard UNIX permissions bits + type of */
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char spare[12]; /* unused bytes for future extensions */
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/* file, see linux/stat.h */
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char name[UMSDOS_MAXNAME]; /* Not '\0' terminated */
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/* but '\0' padded, so it will allow */
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/* for adding news fields in this record */
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/* by reducing the size of name[] */
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};
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#define UMSDOS_HIDDEN 1 /* Never show this entry in directory search */
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#define UMSDOS_HLINK 2 /* It is a (pseudo) hard link */
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/* #Specification: EMD file / record size
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Entry are 64 bytes wide in the EMD file. It allows for a 30 characters
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name. If a name is longer, contiguous entries are allocated. So a
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umsdos_dirent may span multiple records.
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*/
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#define UMSDOS_REC_SIZE 64
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/* Translation between MSDOS name and UMSDOS name */
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struct umsdos_info{
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int msdos_reject; /* Tell if the file name is invalid for MSDOS */
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/* See umsdos_parse */
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struct umsdos_fake_info fake;
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struct umsdos_dirent entry;
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off_t f_pos; /* offset of the entry in the EMD file */
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/* or offset where the entry may be store */
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/* if it is a new entry */
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int recsize; /* Record size needed to store entry */
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};
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/* Definitions for ioctl (number randomly chosen) */
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/* The next ioctl commands operate only on the DOS directory */
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/* The file umsdos_progs/umsdosio.c contain a string table */
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/* based on the order of those definition. Keep it in sync */
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#define UMSDOS_READDIR_DOS _IO(0x04,210) /* Do a readdir of the DOS directory */
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#define UMSDOS_UNLINK_DOS _IO(0x04,211) /* Erase in the DOS directory only */
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#define UMSDOS_RMDIR_DOS _IO(0x04,212) /* rmdir in the DOS directory only */
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#define UMSDOS_STAT_DOS _IO(0x04,213) /* Get info about a file */
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/* The next ioctl commands operate only on the EMD file */
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#define UMSDOS_CREAT_EMD _IO(0x04,214) /* Create a file */
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#define UMSDOS_UNLINK_EMD _IO(0x04,215) /* unlink (rmdir) a file */
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#define UMSDOS_READDIR_EMD _IO(0x04,216) /* read the EMD file only. */
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#define UMSDOS_GETVERSION _IO(0x04,217) /* Get the release number of UMSDOS */
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#define UMSDOS_INIT_EMD _IO(0x04,218) /* Create the EMD file if not there */
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#define UMSDOS_DOS_SETUP _IO(0x04,219) /* Set the defaults of the MsDOS driver */
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#define UMSDOS_RENAME_DOS _IO(0x04,220) /* rename a file/directory in the DOS */
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/* directory only */
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struct umsdos_ioctl{
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struct dirent dos_dirent;
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struct umsdos_dirent umsdos_dirent;
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/* The following structure is used to exchange some data */
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/* with utilities (umsdos_progs/util/umsdosio.c). The first */
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/* releases were using struct stat from "sys/stat.h". This was */
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/* causing some problem for cross compilation of the kernel */
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/* Since I am not really using the structure stat, but only some field */
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/* of it, I have decided to replicate the structure here */
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/* for compatibility with the binaries out there */
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struct {
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dev_t st_dev;
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unsigned short __pad1;
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ino_t st_ino;
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umode_t st_mode;
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nlink_t st_nlink;
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uid_t st_uid;
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gid_t st_gid;
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dev_t st_rdev;
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unsigned short __pad2;
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off_t st_size;
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unsigned long st_blksize;
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unsigned long st_blocks;
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time_t st_atime;
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unsigned long __unused1;
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time_t st_mtime;
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unsigned long __unused2;
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time_t st_ctime;
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unsigned long __unused3;
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unsigned long __unused4;
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unsigned long __unused5;
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}stat;
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char version,release;
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};
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/* Different macros to access struct umsdos_dirent */
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#define EDM_ENTRY_ISUSED(e) ((e)->name_len!=0)
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#ifdef __KERNEL__
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#ifndef LINUX_FS_H
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#include <linux/fs.h>
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#endif
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extern struct inode_operations umsdos_dir_inode_operations;
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extern struct file_operations umsdos_file_operations;
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extern struct inode_operations umsdos_file_inode_operations;
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extern struct inode_operations umsdos_file_inode_operations_no_bmap;
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extern struct inode_operations umsdos_symlink_inode_operations;
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extern int init_umsdos_fs(void);
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#include <linux/umsdos_fs.p>
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#endif /* __KERNEL__ */
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#endif
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