43518607b2
The primary focus of these changes is to modernize FreeBSD's
tape infrastructure so that we can take advantage of some of the
features of modern tape drives and allow support for LTFS.
Significant changes and new features include:
o sa(4) driver status and parameter information is now exported via an
XML structure. This will allow for changes and improvements later
on that will not break userland applications. The old MTIOCGET
status ioctl remains, so applications using the existing interface
will not break.
o 'mt status' now reports drive-reported tape position information
as well as the previously available calculated tape position
information. These numbers will be different at times, because
the drive-reported block numbers are relative to BOP (Beginning
of Partition), but the block numbers calculated previously via
sa(4) (and still provided) are relative to the last filemark.
Both numbers are now provided. 'mt status' now also shows the
drive INQUIRY information, serial number and any position flags
(BOP, EOT, etc.) provided with the tape position information.
'mt status -v' adds information on the maximum possible I/O size,
and the underlying values used to calculate it.
o The extra sa(4) /dev entries (/dev/saN.[0-3]) have been removed.
The extra devices were originally added as place holders for
density-specific device nodes. Some OSes (NetBSD, NetApp's OnTap
and Solaris) have had device nodes that, when you write to them,
will automatically select a given density for particular tape drives.
This is a convenient way of switching densities, but it was never
implemented in FreeBSD. Only the device nodes were there, and that
sometimes confused users.
For modern tape devices, the density is generally not selectable
(e.g. with LTO) or defaults to the highest availble density when
the tape is rewritten from BOT (e.g. TS11X0). So, for most users,
density selection won't be necessary. If they do need to select
the density, it is easy enough to use 'mt density' to change it.
o Protection information is now supported. This is either a
Reed-Solomon CRC or CRC32 that is included at the end of each block
read and written. On write, the tape drive verifies the CRC, and
on read, the tape drive provides a CRC for the userland application
to verify.
o New, extensible tape driver parameter get/set interface.
o Density reporting information. For drives that support it,
'mt getdensity' will show detailed information on what formats the
tape drive supports, and what formats the tape drive supports.
o Some mt(1) functionality moved into a new mt(3) library so that
external applications can reuse the code.
o The new mt(3) library includes helper routines to aid in parsing
the XML output of the sa(4) driver, and build a tree of driver
metadata.
o Support for the MTLOAD (load a tape in the drive) and MTWEOFI
(write filemark immediate) ioctls needed by IBM's LTFS
implementation.
o Improve device departure behavior for the sa(4) driver. The previous
implementation led to hangs when the device was open.
o This has been tested on the following types of drives:
IBM TS1150
IBM TS1140
IBM LTO-6
IBM LTO-5
HP LTO-2
Seagate DDS-4
Quantum DLT-4000
Exabyte 8505
Sony DDS-2
contrib/groff/tmac/doc-syms,
share/mk/bsd.libnames.mk,
lib/Makefile,
Add libmt.
lib/libmt/Makefile,
lib/libmt/mt.3,
lib/libmt/mtlib.c,
lib/libmt/mtlib.h,
New mt(3) library that contains functions moved from mt(1) and
new functions needed to interact with the updated sa(4) driver.
This includes XML parser helper functions that application writers
can use when writing code to query tape parameters.
rescue/rescue/Makefile:
Add -lmt to CRUNCH_LIBS.
src/share/man/man4/mtio.4
Clarify this man page a bit, and since it contains what is
essentially the mtio.h header file, add new ioctls and structure
definitions from mtio.h.
src/share/man/man4/sa.4
Update BUGS and maintainer section.
sys/cam/scsi/scsi_all.c,
sys/cam/scsi/scsi_all.h:
Add SCSI SECURITY PROTOCOL IN/OUT CDB definitions and CDB building
functions.
sys/cam/scsi/scsi_sa.c
sys/cam/scsi/scsi_sa.h
Many tape driver changes, largely outlined above.
Increase the sa(4) driver read/write timeout from 4 to 32
minutes. This is based on the recommended values for IBM LTO
5/6 drives. This may also avoid timeouts for other tape
hardware that can take a long time to do retries and error
recovery. Longer term, a better way to handle this is to ask
the drive for recommended timeout values using the REPORT
SUPPORTED OPCODES command. Modern IBM and Oracle tape drives
at least support that command, and it would allow for more
accurate timeout values.
Add XML status generation. This is done with a series of
macros to eliminate as much duplicate code as possible. The
new XML-based status values are reported through the new
MTIOCEXTGET ioctl.
Add XML driver parameter reporting, using the new MTIOCPARAMGET
ioctl.
Add a new driver parameter setting interface, using the new
MTIOCPARAMSET and MTIOCSETLIST ioctls.
Add a new MTIOCRBLIM ioctl to get block limits information.
Add CCB/CDB building routines scsi_locate_16, scsi_locate_10,
and scsi_read_position_10().
scsi_locate_10 implements the LOCATE command, as does the
existing scsi_set_position() command. It just supports
additional arguments and features. If/when we figure out a
good way to provide backward compatibility for older
applications using the old function API, we can just revamp
scsi_set_position(). The same goes for
scsi_read_position_10() and the existing scsi_read_position()
function.
Revamp sasetpos() to take the new mtlocate structure as an
argument. It now will use either scsi_locate_10() or
scsi_locate_16(), depending upon the arguments the user
supplies. As before, once we change position we don't have a
clear idea of what the current logical position of the tape
drive is.
For tape drives that support long form position data, we
read the current position and store that for later reporting
after changing the position. This should help applications
like Bacula speed tape access under FreeBSD once they are
modified to support the new ioctls.
Add a new quirk, SA_QUIRK_NO_LONG_POS, that is set for all
drives that report SCSI-2 or older, as well as drives that
report an Illegal Request type error for READ POSITION with
the long format. So we should automatically detect drives
that don't support the long form and stop asking for it after
an initial try.
Add a partition number to the sa(4) softc.
Improve device departure handling. The previous implementation
led to hangs when the device was open.
If an application had the sa(4) driver open, and attempted to
close it after it went away, the cam_periph_release() call in
saclose() would cause the periph to get destroyed because that
was the last reference to it. Because destroy_dev() was
called from the sa(4) driver's cleanup routine (sacleanup()),
and would block waiting for the close to happen, a deadlock
would result.
So instead of calling destroy_dev() from the cleanup routine,
call destroy_dev_sched_cb() from saoninvalidate() and wait for
the callback.
Acquire a reference for devfs in saregister(), and release it
in the new sadevgonecb() routine when all devfs devices for
the particular sa(4) driver instance are gone.
Add a new function, sasetupdev(), to centralize setting
per-instance devfs device parameters instead of repeating the
code in saregister().
Add an open count to the softc, so we know how many
peripheral driver references are a result of open
sessions.
Add the D_TRACKCLOSE flag to the cdevsw flags so
that we get a 1:1 mapping of open to close calls
instead of a N:1 mapping.
This should be a no-op for everything except the
control device, since we don't allow more than one
open on non-control devices.
However, since we do allow multiple opens on the
control device, the combination of the open count
and the D_TRACKCLOSE flag should result in an
accurate peripheral driver reference count, and an
accurate open count.
The accurate open count allows us to release all
peripheral driver references that are the result
of open contexts once we get the callback from devfs.
sys/sys/mtio.h:
Add a number of new mt(4) ioctls and the requisite data
structures. None of the existing interfaces been removed
or changed.
This includes definitions for the following new ioctls:
MTIOCRBLIM /* get block limits */
MTIOCEXTLOCATE /* seek to position */
MTIOCEXTGET /* get tape status */
MTIOCPARAMGET /* get tape params */
MTIOCPARAMSET /* set tape params */
MTIOCSETLIST /* set N params */
usr.bin/mt/Makefile:
mt(1) now depends on libmt, libsbuf and libbsdxml.
usr.bin/mt/mt.1:
Document new mt(1) features and subcommands.
usr.bin/mt/mt.c:
Implement support for mt(1) subcommands that need to
use getopt(3) for their arguments.
Implement a new 'mt status' command to replace the old
'mt status' command. The old status command has been
renamed 'ostatus'.
The new status function uses the MTIOCEXTGET ioctl, and
therefore parses the XML data to determine drive status.
The -x argument to 'mt status' allows the user to dump out
the raw XML reported by the kernel.
The new status display is mostly the same as the old status
display, except that it doesn't print the redundant density
mode information, and it does print the current partition
number and position flags.
Add a new command, 'mt locate', that will supersede the
old 'mt setspos' and 'mt sethpos' commands. 'mt locate'
implements all of the functionality of the MTIOCEXTLOCATE
ioctl, and allows the user to change the logical position
of the tape drive in a number of ways. (Partition,
block number, file number, set mark number, end of data.)
The immediate bit and the explicit address bits are
implemented, but not documented in the man page.
Add a new 'mt weofi' command to use the new MTWEOFI ioctl.
This allows the user to ask the drive to write a filemark
without waiting around for the operation to complete.
Add a new 'mt getdensity' command that gets the XML-based
tape drive density report from the sa(4) driver and displays
it. This uses the SCSI REPORT DENSITY SUPPORT command
to get comprehensive information from the tape drive about
what formats it is able to read and write.
Add a new 'mt protect' command that allows getting and setting
tape drive protection information. The protection information
is a CRC tacked on to the end of every read/write from and to
the tape drive.
Sponsored by: Spectra Logic
MFC after: 1 month
415 lines
13 KiB
Groff
415 lines
13 KiB
Groff
.\" Copyright (c) 1996
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.\" Mike Pritchard <mpp@FreeBSD.org>. All rights reserved.
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.\"
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.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
|
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)mtio.4 8.1 (Berkeley) 6/5/93
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.\" $FreeBSD$
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.\"
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.Dd February 12, 2015
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.Dt MTIO 4
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.Os
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.Sh NAME
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.Nm mtio
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.Nd FreeBSD magtape interface
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.Sh DESCRIPTION
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The special files
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named
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.Pa /dev/[en]sa*
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refer to SCSI tape drives,
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which may be attached to the system.
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.Pa /dev/sa*.ctl
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are control devices that can be used to issue ioctls to the SCSI
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tape driver to set parameters that are required to last beyond the
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unmounting of a tape.
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.Pp
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The rewind devices automatically rewind
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when the last requested read, write or seek has finished, or the end of the tape
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has been reached.
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The letter
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.Ql n
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is prepended to
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the name of the no-rewind devices.
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The letter
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.Ql e
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is prepended to the name of the eject devices.
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.Pp
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Tapes can be written with either fixed length records or variable length
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records.
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See
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.Xr sa 4
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for more information.
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Two filemarks mark the end of a tape, and
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one filemark marks the end of a tape file.
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If the tape is not to be rewound it is positioned with the
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head in between the two tape marks, where the next write
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will over write the second end-of-file marker.
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.Pp
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All of the magtape devices may be manipulated with the
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.Xr mt 1
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command.
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.Pp
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A number of
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.Xr ioctl 2
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operations are available
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on raw magnetic tape.
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The following definitions are from
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.In sys/mtio.h :
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.Bd -literal
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#ifndef _SYS_MTIO_H_
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#define _SYS_MTIO_H_
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#ifndef _KERNEL
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#include <sys/types.h>
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#endif
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#include <sys/ioccom.h>
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/*
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* Structures and definitions for mag tape io control commands
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*/
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/* structure for MTIOCTOP - mag tape op command */
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struct mtop {
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short mt_op; /* operations defined below */
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int32_t mt_count; /* how many of them */
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};
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/* operations */
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#define MTWEOF 0 /* write an end-of-file record */
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#define MTFSF 1 /* forward space file */
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#define MTBSF 2 /* backward space file */
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#define MTFSR 3 /* forward space record */
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#define MTBSR 4 /* backward space record */
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#define MTREW 5 /* rewind */
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#define MTOFFL 6 /* rewind and put the drive offline */
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#define MTNOP 7 /* no operation, sets status only */
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#define MTCACHE 8 /* enable controller cache */
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#define MTNOCACHE 9 /* disable controller cache */
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#if defined(__FreeBSD__)
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/* Set block size for device. If device is a variable size dev */
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/* a non zero parameter will change the device to a fixed block size */
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/* device with block size set to that of the parameter passed in. */
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/* Resetting the block size to 0 will restore the device to a variable */
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/* block size device. */
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#define MTSETBSIZ 10
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/* Set density values for device. Sets the value for the opened mode only. */
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#define MTSETDNSTY 11
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#define MTERASE 12 /* erase to EOM */
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#define MTEOD 13 /* Space to EOM */
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#define MTCOMP 14 /* select compression mode 0=off, 1=def */
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#define MTRETENS 15 /* re-tension tape */
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#define MTWSS 16 /* write setmark(s) */
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#define MTFSS 17 /* forward space setmark */
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#define MTBSS 18 /* backward space setmark */
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#define MTLOAD 19 /* load tape in drive */
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#define MTWEOFI 20 /* write an end-of-file record without waiting*/
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#define MT_COMP_ENABLE 0xffffffff
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#define MT_COMP_DISABLED 0xfffffffe
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#define MT_COMP_UNSUPP 0xfffffffd
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/*
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* Values in mt_dsreg that say what the device is doing
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*/
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#define MTIO_DSREG_NIL 0 /* Unknown */
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#define MTIO_DSREG_REST 1 /* Doing Nothing */
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#define MTIO_DSREG_RBSY 2 /* Communicating with tape (but no motion) */
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#define MTIO_DSREG_WR 20 /* Writing */
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#define MTIO_DSREG_FMK 21 /* Writing Filemarks */
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#define MTIO_DSREG_ZER 22 /* Erasing */
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#define MTIO_DSREG_RD 30 /* Reading */
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#define MTIO_DSREG_FWD 40 /* Spacing Forward */
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#define MTIO_DSREG_REV 41 /* Spacing Reverse */
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#define MTIO_DSREG_POS 42 /* Hardware Positioning (direction unknown) */
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#define MTIO_DSREG_REW 43 /* Rewinding */
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#define MTIO_DSREG_TEN 44 /* Retensioning */
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#define MTIO_DSREG_UNL 45 /* Unloading */
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#define MTIO_DSREG_LD 46 /* Loading */
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#endif /* __FreeBSD__ */
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/* structure for MTIOCGET - mag tape get status command */
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struct mtget {
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short mt_type; /* type of magtape device */
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/* the following two registers are grossly device dependent */
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short mt_dsreg; /* ``drive status'' register */
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short mt_erreg; /* ``error'' register */
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/* end device-dependent registers */
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/*
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* Note that the residual count, while maintained, may be
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* be nonsense because the size of the residual may (greatly)
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* exceed 32 K-bytes. Use the MTIOCERRSTAT ioctl to get a
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* more accurate count.
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*/
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short mt_resid; /* residual count */
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#if defined (__FreeBSD__)
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int32_t mt_blksiz; /* presently operating blocksize */
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int32_t mt_density; /* presently operating density */
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uint32_t mt_comp; /* presently operating compression */
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int32_t mt_blksiz0; /* blocksize for mode 0 */
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int32_t mt_blksiz1; /* blocksize for mode 1 */
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int32_t mt_blksiz2; /* blocksize for mode 2 */
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int32_t mt_blksiz3; /* blocksize for mode 3 */
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int32_t mt_density0; /* density for mode 0 */
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int32_t mt_density1; /* density for mode 1 */
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int32_t mt_density2; /* density for mode 2 */
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int32_t mt_density3; /* density for mode 3 */
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/* the following are not yet implemented */
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uint32_t mt_comp0; /* compression type for mode 0 */
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uint32_t mt_comp1; /* compression type for mode 1 */
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uint32_t mt_comp2; /* compression type for mode 2 */
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uint32_t mt_comp3; /* compression type for mode 3 */
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/* end not yet implemented */
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#endif
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int32_t mt_fileno; /* relative file number of current position */
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int32_t mt_blkno; /* relative block number of current position */
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};
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/* structure for MTIOCERRSTAT - tape get error status command */
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/* really only supported for SCSI tapes right now */
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struct scsi_tape_errors {
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/*
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* These are latched from the last command that had a SCSI
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* Check Condition noted for these operations. The act
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* of issuing an MTIOCERRSTAT unlatches and clears them.
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*/
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uint8_t io_sense[32]; /* Last Sense Data For Data I/O */
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int32_t io_resid; /* residual count from last Data I/O */
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uint8_t io_cdb[16]; /* Command that Caused the Last Data Sense */
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uint8_t ctl_sense[32]; /* Last Sense Data For Control I/O */
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int32_t ctl_resid; /* residual count from last Control I/O */
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uint8_t ctl_cdb[16]; /* Command that Caused the Last Control Sense */
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/*
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* These are the read and write cumulative error counters.
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* (how to reset cumulative error counters is not yet defined).
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* (not implemented as yet but space is being reserved for them)
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*/
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struct {
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uint32_t retries; /* total # retries performed */
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uint32_t corrected; /* total # corrections performed */
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uint32_t processed; /* total # corrections successful */
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uint32_t failures; /* total # corrections/retries failed */
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uint64_t nbytes; /* total # bytes processed */
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} wterr, rderr;
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};
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union mterrstat {
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struct scsi_tape_errors scsi_errstat;
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char _reserved_padding[256];
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};
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struct mtrblim {
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uint32_t granularity;
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uint32_t min_block_length;
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uint32_t max_block_length;
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};
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typedef enum {
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MT_LOCATE_DEST_OBJECT = 0x00,
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MT_LOCATE_DEST_FILE = 0x01,
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MT_LOCATE_DEST_SET = 0x02,
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MT_LOCATE_DEST_EOD = 0x03
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} mt_locate_dest_type;
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typedef enum {
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MT_LOCATE_BAM_IMPLICIT = 0x00,
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MT_LOCATE_BAM_EXPLICIT = 0x01
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} mt_locate_bam;
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typedef enum {
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MT_LOCATE_FLAG_IMMED = 0x01,
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MT_LOCATE_FLAG_CHANGE_PART = 0x02
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} mt_locate_flags;
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struct mtlocate {
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mt_locate_flags flags;
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mt_locate_dest_type dest_type;
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mt_locate_bam block_address_mode;
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int64_t partition;
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uint64_t logical_id;
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uint8_t reserved[64];
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};
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typedef enum {
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MT_EXT_GET_NONE,
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MT_EXT_GET_OK,
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MT_EXT_GET_NEED_MORE_SPACE,
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MT_EXT_GET_ERROR
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} mt_ext_get_status;
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struct mtextget {
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uint32_t alloc_len;
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char *status_xml;
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uint32_t fill_len;
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mt_ext_get_status status;
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char error_str[128];
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uint8_t reserved[64];
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};
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#define MT_EXT_GET_ROOT_NAME "mtextget"
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#define MT_DENSITY_ROOT_NAME "mtdensity"
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#define MT_MEDIA_DENSITY_NAME "media_density"
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#define MT_DENSITY_REPORT_NAME "density_report"
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#define MT_MEDIUM_TYPE_REPORT_NAME "medium_type_report"
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#define MT_MEDIA_REPORT_NAME "media_report"
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#define MT_DENSITY_ENTRY_NAME "density_entry"
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#define MT_DENS_WRITE_OK 0x80
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#define MT_DENS_DUP 0x40
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#define MT_DENS_DEFLT 0x20
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#define MT_PARAM_FIXED_STR_LEN 32
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union mt_param_value {
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int64_t value_signed;
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uint64_t value_unsigned;
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char *value_var_str;
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char value_fixed_str[MT_PARAM_FIXED_STR_LEN];
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uint8_t reserved[64];
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};
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typedef enum {
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MT_PARAM_SET_NONE,
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MT_PARAM_SET_SIGNED,
|
|
MT_PARAM_SET_UNSIGNED,
|
|
MT_PARAM_SET_VAR_STR,
|
|
MT_PARAM_SET_FIXED_STR
|
|
} mt_param_set_type;
|
|
|
|
typedef enum {
|
|
MT_PARAM_STATUS_NONE,
|
|
MT_PARAM_STATUS_OK,
|
|
MT_PARAM_STATUS_ERROR
|
|
} mt_param_set_status;
|
|
|
|
#define MT_PARAM_VALUE_NAME_LEN 64
|
|
struct mtparamset {
|
|
char value_name[MT_PARAM_VALUE_NAME_LEN];
|
|
mt_param_set_type value_type;
|
|
int value_len;
|
|
union mt_param_value value;
|
|
mt_param_set_status status;
|
|
char error_str[128];
|
|
};
|
|
|
|
#define MT_PARAM_ROOT_NAME "mtparamget"
|
|
#define MT_PROTECTION_NAME "protection"
|
|
|
|
/*
|
|
* Set a list of parameters.
|
|
*/
|
|
struct mtsetlist {
|
|
int num_params;
|
|
int param_len;
|
|
struct mtparamset *params;
|
|
};
|
|
|
|
/*
|
|
* Constants for mt_type byte. These are the same
|
|
* for controllers compatible with the types listed.
|
|
*/
|
|
#define MT_ISTS 0x01 /* TS-11 */
|
|
#define MT_ISHT 0x02 /* TM03 Massbus: TE16, TU45, TU77 */
|
|
#define MT_ISTM 0x03 /* TM11/TE10 Unibus */
|
|
#define MT_ISMT 0x04 /* TM78/TU78 Massbus */
|
|
#define MT_ISUT 0x05 /* SI TU-45 emulation on Unibus */
|
|
#define MT_ISCPC 0x06 /* SUN */
|
|
#define MT_ISAR 0x07 /* SUN */
|
|
#define MT_ISTMSCP 0x08 /* DEC TMSCP protocol (TU81, TK50) */
|
|
#define MT_ISCY 0x09 /* CCI Cipher */
|
|
#define MT_ISCT 0x0a /* HP 1/4 tape */
|
|
#define MT_ISFHP 0x0b /* HP 7980 1/2 tape */
|
|
#define MT_ISEXABYTE 0x0c /* Exabyte */
|
|
#define MT_ISEXA8200 0x0c /* Exabyte EXB-8200 */
|
|
#define MT_ISEXA8500 0x0d /* Exabyte EXB-8500 */
|
|
#define MT_ISVIPER1 0x0e /* Archive Viper-150 */
|
|
#define MT_ISPYTHON 0x0f /* Archive Python (DAT) */
|
|
#define MT_ISHPDAT 0x10 /* HP 35450A DAT drive */
|
|
#define MT_ISMFOUR 0x11 /* M4 Data 1/2 9track drive */
|
|
#define MT_ISTK50 0x12 /* DEC SCSI TK50 */
|
|
#define MT_ISMT02 0x13 /* Emulex MT02 SCSI tape controller */
|
|
|
|
/* mag tape io control commands */
|
|
#define MTIOCTOP _IOW('m', 1, struct mtop) /* do a mag tape op */
|
|
#define MTIOCGET _IOR('m', 2, struct mtget) /* get tape status */
|
|
/* these two do not appear to be used anywhere */
|
|
#define MTIOCIEOT _IO('m', 3) /* ignore EOT error */
|
|
#define MTIOCEEOT _IO('m', 4) /* enable EOT error */
|
|
/*
|
|
* When more SCSI-3 SSC (streaming device) devices are out there
|
|
* that support the full 32 byte type 2 structure, we'll have to
|
|
* rethink these ioctls to support all the entities they haul into
|
|
* the picture (64 bit blocks, logical file record numbers, etc..).
|
|
*/
|
|
#define MTIOCRDSPOS _IOR('m', 5, uint32_t) /* get logical blk addr */
|
|
#define MTIOCRDHPOS _IOR('m', 6, uint32_t) /* get hardware blk addr */
|
|
#define MTIOCSLOCATE _IOW('m', 5, uint32_t) /* seek to logical blk addr */
|
|
#define MTIOCHLOCATE _IOW('m', 6, uint32_t) /* seek to hardware blk addr */
|
|
#define MTIOCERRSTAT _IOR('m', 7, union mterrstat) /* get tape errors */
|
|
/*
|
|
* Set EOT model- argument is number of filemarks to end a tape with.
|
|
* Note that not all possible values will be accepted.
|
|
*/
|
|
#define MTIOCSETEOTMODEL _IOW('m', 8, uint32_t)
|
|
/* Get current EOT model */
|
|
#define MTIOCGETEOTMODEL _IOR('m', 8, uint32_t)
|
|
#define MTIOCRBLIM _IOR('m', 9, struct mtrblim) /* get block limits */
|
|
#define MTIOCEXTLOCATE _IOW('m', 10, struct mtlocate) /* seek to position */
|
|
#define MTIOCEXTGET _IOWR('m', 11, struct mtextget) /* get tape status */
|
|
#define MTIOCPARAMGET _IOWR('m', 12, struct mtextget) /* get tape params */
|
|
#define MTIOCPARAMSET _IOWR('m', 13, struct mtparamset) /* set tape params */
|
|
#define MTIOCSETLIST _IOWR('m', 14, struct mtsetlist) /* set N params */
|
|
|
|
#ifndef _KERNEL
|
|
#define DEFTAPE "/dev/nsa0"
|
|
#endif
|
|
|
|
#endif /* !_SYS_MTIO_H_ */
|
|
.Ed
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/[en]sa* -compact
|
|
.It Pa /dev/[en]sa*
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr mt 1 ,
|
|
.Xr tar 1 ,
|
|
.Xr sa 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
manual appeared in
|
|
.Bx 4.2 .
|
|
An i386 version first appeared in
|
|
.Fx 2.2 .
|