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Julian's suport of compressed tape drives.

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This commit is contained in:
Peter Dufault 1995-03-21 11:21:37 +00:00
parent 3358f19c6e
commit e8d9ff42ce
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=7217
1 changed files with 13 additions and 6 deletions
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19
sys/sys/mtio.h
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)mtio.h 8.1 (Berkeley) 6/2/93
* $Id: mtio.h,v 1.3 1994/08/02 07:53:17 davidg Exp $
* $Id: mtio.h,v 1.4 1994/10/28 13:19:42 jkh Exp $
*/
#ifndef _SYS_MTIO_H_
@ -68,7 +68,7 @@ struct mtop {
#define MTSETBSIZ 10
/* Set density values for device. Thye aredefined in the SCSI II spec */
/* Set density values for device. They are defined in the SCSI II spec */
/* and range from 0 to 0x17. Sets the value for the openned mode only */
#define MTSETDNSTY 11
@ -76,7 +76,9 @@ struct mtop {
/*
** Tape erase function - AKL: Andreas Klemm <andreas@knobel.gun.de>
*/
#define MTERASE 12
#define MTERASE 12 /* erase to EOM */
#define MTEOD 13 /* Space to EOM *//* lost the code for this */
#define MTCOMP 14 /* select compression mode 0=off, 1=def */
#endif
@ -90,8 +92,9 @@ struct mtget {
/* end device-dependent registers */
short mt_resid; /* residual count */
#if defined (__FreeBSD__)
daddr_t mt_blksiz; /* presently operatin blocksize */
daddr_t mt_density; /* presently operatin density */
daddr_t mt_blksiz; /* presently operating blocksize */
daddr_t mt_density; /* presently operating density */
daddr_t mt_comp; /* presently operating compresion */
daddr_t mt_blksiz0; /* blocksize for mode 0 */
daddr_t mt_blksiz1; /* blocksize for mode 1 */
daddr_t mt_blksiz2; /* blocksize for mode 2 */
@ -100,8 +103,12 @@ struct mtget {
daddr_t mt_density1; /* density for mode 1 */
daddr_t mt_density2; /* density for mode 2 */
daddr_t mt_density3; /* density for mode 3 */
/* the following are not yet implemented */
u_char mt_comp0; /* compression type for mode 0 */
u_char mt_comp1; /* compression type for mode 1 */
u_char mt_comp2; /* compression type for mode 2 */
u_char mt_comp3; /* compression type for mode 3 */
#endif
/* the following two are not yet implemented */
daddr_t mt_fileno; /* file number of current position */
daddr_t mt_blkno; /* block number of current position */
/* end not yet implemented */