Viewing file:  zftape.h (2.32 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#ifndef _ZFTAPE_H
#define _ZFTAPE_H
/*
* Copyright (C) 1996, 1997 Claus-Justus Heine.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Source: /homes/cvs/ftape-stacked/include/linux/zftape.h,v $
* $Revision: 1.12 $
* $Date: 1997/10/21 11:02:37 $
*
* Special ioctl and other global info for the zftape VFS
* interface for the QIC-40/80/3010/3020 floppy-tape driver for
* Linux.
*/
#define ZFTAPE_VERSION "zftape for " FTAPE_VERSION
#include <linux/ftape.h>
#define ZFTAPE_LABEL "Ftape - The Linux Floppy Tape Project!"
/* Bits of the minor device number that control the operation mode */
#define ZFT_Q80_MODE (1 << 3)
#define ZFT_ZIP_MODE (1 << 4)
#define ZFT_RAW_MODE (1 << 5)
#define ZFT_MINOR_OP_MASK (ZFT_Q80_MODE | \
ZFT_ZIP_MODE | \
ZFT_RAW_MODE)
#define ZFT_MINOR_MASK (FTAPE_SEL_MASK | \
ZFT_MINOR_OP_MASK | \
FTAPE_NO_REWIND)
#ifdef ZFT_OBSOLETE
struct mtblksz {
unsigned int mt_blksz;
};
#define MTIOC_ZFTAPE_GETBLKSZ _IOR('m', 104, struct mtblksz)
#endif
#ifdef __KERNEL__
extern int zft_init(void);
static inline __s64 zft_div_blksz(__s64 value, __u32 blk_sz)
{
if (blk_sz == 1) {
return value;
} else {
return (__s64)(((__u32)(value >> 10) + (blk_sz >> 10) - 1)
/ (blk_sz >> 10));
}
}
static inline __s64 zft_mul_blksz(__s64 value, __u32 blk_sz)
{
if (blk_sz == 1) {
return value;
} else {
/* if blk_sz != 1, then it is a multiple of 1024. In
* this case, `value' will also fit into 32 bits.
*
* Actually, this limits the capacity to 42
* bits. This is (2^32)*1024, roughly a thousand
* times 2GB, or 3 Terabytes. Hopefully this is enough
*/
return(__s64)(((__u32)(value)*(blk_sz>>10))<<10);
}
}
#endif
#endif
|