NetBSD/sbin/scsictl/scsi_subr.c

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/* $NetBSD: scsi_subr.c,v 1.14 2012/02/21 02:22:54 jakllsch Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
* Simulation Facility, NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* SCSI support subroutines.
*
* XXX THESE SHOULD BE IN A LIBRARY!
*/
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#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: scsi_subr.c,v 1.14 2012/02/21 02:22:54 jakllsch Exp $");
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#endif
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/scsiio.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <dev/scsipi/scsi_spc.h>
#include "extern.h"
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#define STRVIS_ISWHITE(x) ((x) == ' ' || (x) == '\0' || (x) == (u_char)'\377')
void
scsi_command(int fd, const void *cmd, size_t cmdlen,
void *data, size_t datalen, int timeout, int flags)
{
scsireq_t req;
memset(&req, 0, sizeof(req));
cmdlen = MIN(cmdlen, sizeof(req.cmd));
memcpy(req.cmd, cmd, cmdlen);
req.cmdlen = cmdlen;
req.databuf = data;
req.datalen = datalen;
req.timeout = timeout;
req.flags = flags;
req.senselen = SENSEBUFLEN;
if (ioctl(fd, SCIOCCOMMAND, &req) == -1)
err(1, "SCIOCCOMMAND");
if (req.retsts == SCCMD_OK)
return;
/* Some problem; report it and exit. */
if (req.retsts == SCCMD_TIMEOUT)
fprintf(stderr, "%s: SCSI command timed out\n", dvname);
else if (req.retsts == SCCMD_BUSY)
fprintf(stderr, "%s: device is busy\n", dvname);
else if (req.retsts == SCCMD_SENSE)
scsi_print_sense(dvname, &req, 1);
else
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fprintf(stderr, "%s: device had unknown status %x\n", dvname,
req.retsts);
exit(1);
}
void
scsi_mode_sense(int fd, u_int8_t pgcode, u_int8_t pctl, void *buf, size_t len)
{
struct scsi_mode_sense_6 cmd;
memset(&cmd, 0, sizeof(cmd));
memset(buf, 0, len);
cmd.opcode = SCSI_MODE_SENSE_6;
cmd.page = pgcode | pctl;
cmd.length = len;
scsi_command(fd, &cmd, sizeof(cmd), buf, len, 10000, SCCMD_READ);
}
void
scsi_mode_select(int fd, u_int8_t byte2, void *buf, size_t len)
{
struct scsi_mode_select_6 cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = SCSI_MODE_SELECT_6;
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cmd.byte2 = SMS_PF | byte2;
cmd.length = len;
scsi_command(fd, &cmd, sizeof(cmd), buf, len, 10000, SCCMD_WRITE);
}
void
scsi_request_sense(int fd, void *buf, size_t len)
{
struct scsi_request_sense cmd;
memset(&cmd, 0, sizeof(cmd));
memset(buf, 0, len);
cmd.opcode = SCSI_REQUEST_SENSE;
cmd.length = len;
scsi_command(fd, &cmd, sizeof(cmd), buf, len, 10000, SCCMD_READ);
}
void
scsi_strvis(char *sdst, size_t dlen, const char *ssrc, size_t slen)
{
u_char *dst = (u_char *)sdst;
const u_char *src = (const u_char *)ssrc;
/* Trim leading and trailing blanks and NULs. */
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while (slen > 0 && STRVIS_ISWHITE(src[0]))
++src, --slen;
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while (slen > 0 && STRVIS_ISWHITE(src[slen - 1]))
--slen;
while (slen > 0) {
if (*src < 0x20 || *src >= 0x80) {
/* non-printable characters */
dlen -= 4;
if (dlen < 1)
break;
*dst++ = '\\';
*dst++ = ((*src & 0300) >> 6) + '0';
*dst++ = ((*src & 0070) >> 3) + '0';
*dst++ = ((*src & 0007) >> 0) + '0';
} else if (*src == '\\') {
/* quote characters */
dlen -= 2;
if (dlen < 1)
break;
*dst++ = '\\';
*dst++ = '\\';
} else {
/* normal characters */
if (--dlen < 1)
break;
*dst++ = *src;
}
++src, --slen;
}
*dst++ = 0;
}