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freebsd-skq/lib/libscsi/scsi.c

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/* scsi: SCSI user library
*/
/* Copyright (c) 1994 HD Associates
* (contact: dufault@hda.com)
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by HD Associates
* 4. Neither the name of the HD Associaates nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES``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 HD ASSOCIATES 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.
* $Id: scsi.c,v 1.3 1995/01/26 23:48:41 dufault Exp $
*/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <sys/scsiio.h>
#include <sys/errno.h>
#include <stdarg.h>
#include <fcntl.h>
#include "scsi.h"
static struct
{
FILE *db_f;
int db_level;
int db_trunc;
} behave;
/* scsireq_reset: Reset a scsireq structure.
*/
scsireq_t *scsireq_reset(scsireq_t *scsireq)
{
if (scsireq == 0)
return scsireq;
scsireq->flags = 0; /* info about the request status and type */
scsireq->timeout = 2000; /* 2 seconds */
bzero(scsireq->cmd, sizeof(scsireq->cmd));
scsireq->cmdlen = 0;
/* Leave scsireq->databuf alone */
/* Leave scsireq->datalen alone */
scsireq->datalen_used = 0;
bzero(scsireq->sense, sizeof(scsireq->sense));
scsireq->senselen = sizeof(scsireq->sense);
scsireq->senselen_used = 0;
scsireq->status = 0;
scsireq->retsts = 0;
scsireq->error = 0;
return scsireq;
}
/* scsireq_new: Allocate and initialize a new scsireq.
*/
scsireq_t *scsireq_new(void)
{
scsireq_t *p = (scsireq_t *)malloc(sizeof(scsireq_t));
if (p)
scsireq_reset(p);
return p;
}
/*
* Decode: Decode the data section of a scsireq. This decodes
* trivial grammar:
*
* fields : field fields
* ;
*
* field : field_specifier
* | control
* ;
*
* control : 's' seek_value
* | 's' '+' seek_value
* ;
*
* seek_value : DECIMAL_NUMBER
* | 'v' // For indirect seek, i.e., value from the arg list
* ;
*
* field_specifier : type_specifier field_width
* | '{' NAME '}' type_specifier field_width
* ;
*
* field_width : DECIMAL_NUMBER
* ;
*
* type_specifier : 'i' // Integral types (i1, i2, i3, i4)
* | 'b' // Bits
* | 'c' // Character arrays
* | 'z' // Character arrays with zeroed trailing spaces
* ;
*
* Notes:
* 1. Integral types are swapped into host order.
* 2. Bit fields are allocated MSB to LSB to match the SCSI spec documentation.
* 3. 's' permits "seeking" in the string. "s+DECIMAL" seeks relative to
* DECIMAL; "sDECIMAL" seeks absolute to decimal.
* 4. 's' permits an indirect reference. "sv" or "s+v" will get the
* next integer value from the arg array.
* 5. Field names can be anything between the braces
*
* BUGS:
* i and b types are promoted to ints.
*
*/
static int do_buff_decode(u_char *databuf, size_t len,
void (*arg_put)(void *, int , void *, int, char *), void *puthook,
char *fmt, va_list ap)
{
int assigned = 0;
int width;
int suppress;
int plus;
int done = 0;
static u_char mask[] = {0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff};
int value;
u_char *base = databuf;
char letter;
char field_name[80];
# define ARG_PUT(ARG) \
do \
{ \
if (!suppress) \
{ \
if (arg_put) \
(*arg_put)(puthook, letter, \
(void *)((long)(ARG)), 1, field_name); \
else \
*(va_arg(ap, int *)) = (ARG); \
assigned++; \
} \
field_name[0] = 0; \
suppress = 0; \
} while (0)
u_char bits = 0; /* For bit fields */
int shift = 0; /* Bits already shifted out */
suppress = 0;
field_name[0] = 0;
while (!done)
{
switch(letter = *fmt)
{
case ' ': /* White space */
case '\t':
case '\r':
case '\n':
case '\f':
fmt++;
break;
case '#': /* Comment */
while (*fmt && (*fmt != '\n'))
fmt++;
if (fmt)
fmt++; /* Skip '\n' */
break;
case '*': /* Suppress assignment */
fmt++;
suppress = 1;
break;
case '{': /* Field Name */
{
int i = 0;
fmt++; /* Skip '{' */
while (*fmt && (*fmt != '}'))
{
if (i < sizeof(field_name))
field_name[i++] = *fmt;
fmt++;
}
if (fmt)
fmt++; /* Skip '}' */
field_name[i] = 0;
}
break;
case 'b': /* Bits */
fmt++;
width = strtol(fmt, &fmt, 10);
if (width > 8)
done = 1;
else
{
if (shift <= 0)
{
bits = *databuf++;
shift = 8;
}
value = (bits >> (shift - width)) & mask[width];
#if 0
printf("shift %2d bits %02x value %02x width %2d mask %02x\n",
shift, bits, value, width, mask[width]);
#endif
ARG_PUT(value);
shift -= width;
}
break;
case 'i': /* Integral values */
shift = 0;
fmt++;
width = strtol(fmt, &fmt, 10);
switch(width)
{
case 1:
ARG_PUT(*databuf);
databuf++;
break;
case 2:
ARG_PUT(
(*databuf) << 8 |
*(databuf + 1));
databuf += 2;
break;
case 3:
ARG_PUT(
(*databuf) << 16 |
(*(databuf + 1)) << 8 |
*(databuf + 2));
databuf += 3;
break;
case 4:
ARG_PUT(
(*databuf) << 24 |
(*(databuf + 1)) << 16 |
(*(databuf + 2)) << 8 |
*(databuf + 3));
databuf += 4;
break;
default:
done = 1;
}
break;
case 'c': /* Characters (i.e., not swapped) */
case 'z': /* Characters with zeroed trailing spaces */
shift = 0;
fmt++;
width = strtol(fmt, &fmt, 10);
if (!suppress)
{
if (arg_put)
(*arg_put)(puthook, letter, databuf, width, field_name);
else
{
char *dest;
dest = va_arg(ap, char *);
bcopy(databuf, dest, width);
if (letter == 'z')
{
char *p;
for (p = dest + width - 1;
(p >= (char *)dest) && (*p == ' '); p--)
*p = 0;
}
}
assigned++;
}
databuf += width;
field_name[0] = 0;
suppress = 0;
break;
case 's': /* Seek */
shift = 0;
fmt++;
if (*fmt == '+')
{
plus = 1;
fmt++;
}
else
plus = 0;
if (tolower(*fmt) == 'v')
{
/* You can't suppress a seek value. You also
* can't have a variable seek when you are using
* "arg_put".
*/
width = (arg_put) ? 0 : va_arg(ap, int);
fmt++;
}
else
width = strtol(fmt, &fmt, 10);
if (plus)
databuf += width; /* Relative seek */
else
databuf = base + width; /* Absolute seek */
break;
case 0:
done = 1;
break;
default:
fprintf(stderr, "Unknown letter in format: %c\n", letter);
fmt++;
}
}
return assigned;
}
int scsireq_decode(scsireq_t *scsireq, char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
return do_buff_decode(scsireq->databuf, (size_t)scsireq->datalen,
0, 0, fmt, ap);
}
int scsireq_decode_visit(scsireq_t *scsireq, char *fmt,
void (*arg_put)(void *, int , void *, int, char *), void *puthook)
{
va_list ap = (va_list)0;
return do_buff_decode(scsireq->databuf, (size_t)scsireq->datalen,
arg_put, puthook, fmt, ap);
}
int scsireq_buff_decode(u_char *buff, size_t len, char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
return do_buff_decode(buff, len, 0, 0, fmt, ap);
}
int scsireq_buff_decode_visit(u_char *buff, size_t len, char *fmt,
void (*arg_put)(void *, int, void *, int, char *), void *puthook)
{
va_list ap = (va_list)0;
return do_buff_decode(buff, len, arg_put, puthook, fmt, ap);
}
/* next_field: Return the next field in a command specifier. This
* builds up a SCSI command using this trivial grammar:
*
* fields : field fields
* ;
*
* field : value
* | value ':' field_width
* ;
*
* field_width : digit
* | 'i' digit // i2 = 2 byte integer, i3 = 3 byte integer etc.
* ;
*
* value : HEX_NUMBER
* | 'v' // For indirection.
* ;
*
* Notes:
* Bit fields are specified MSB first to match the SCSI spec.
*
* Examples:
* TUR: "0 0 0 0 0 0"
* WRITE BUFFER: "38 v:3 0:2 0:3 v v:i3 v:i3 0", mode, buffer_id, list_length
*
* The function returns the value:
* 0: For reached end, with error_p set if an error was found
* 1: For valid stuff setup
* 2: For "v" was entered as the value (implies use varargs)
*
*/
static int next_field(char **pp,
char *fmt, int *width_p, int *value_p, char *name, int n_name, int *error_p)
{
char *p = *pp;
int something = 0;
enum
{
BETWEEN_FIELDS,
START_FIELD,
GET_FIELD,
DONE,
} state;
int value = 0;
int field_size; /* Default to byte field type... */
int field_width; /* 1 byte wide */
int is_error = 0;
field_size = 8; /* Default to byte field type... */
*fmt = 'i';
field_width = 1; /* 1 byte wide */
if (name)
*name = 0;
state = BETWEEN_FIELDS;
while (state != DONE)
{
switch(state)
{
case BETWEEN_FIELDS:
if (*p == 0)
state = DONE;
else if (isspace(*p))
p++;
else if (*p == '#')
{
while (*p && *p != '\n')
p++;
if (p)
p++;
}
else if (*p == '{')
{
int i = 0;
p++;
while (*p && *p != '}')
{
if(name && i < n_name)
{
name[i] = *p;
i++;
}
p++;
}
if(name && i < n_name)
name[i] = 0;
if (*p == '}')
p++;
}
else if (isxdigit(*p))
{
something = 1;
value = strtol(p, &p, 16);
state = START_FIELD;
}
else if (tolower(*p) == 'v')
{
p++;
something = 2;
value = *value_p;
state = START_FIELD;
}
else if (tolower(*p) == 's') /* Seek */
{
*fmt = 's';
p++;
if (tolower(*p) == 'v')
{
p++;
something = 2;
value = *value_p;
}
else
{
something = 1;
value = strtol(p, &p, 0);
}
state = DONE;
}
else
{
fprintf(stderr, "Invalid starting character\n");
is_error = 1;
state = DONE;
}
break;
case START_FIELD:
if (*p == ':')
{
p++;
field_size = 1; /* Default to bits when specified */
state = GET_FIELD;
}
else
state = DONE;
break;
case GET_FIELD:
if (isdigit(*p))
{
*fmt = 'b';
field_size = 1;
field_width = strtol(p, &p, 10);
state = DONE;
}
else if (*p == 'i') /* Integral (bytes) */
{
p++;
*fmt = 'i';
field_size = 8;
field_width = strtol(p, &p, 10);
state = DONE;
}
else if (*p == 'b') /* Bits */
{
p++;
*fmt = 'b';
field_size = 1;
field_width = strtol(p, &p, 10);
state = DONE;
}
else
{
fprintf(stderr, "Invalid startfield %c (%02x)\n",
*p, *p);
is_error = 1;
state = DONE;
}
break;
case DONE:
break;
}
}
if (is_error)
{
*error_p = 1;
return 0;
}
*error_p = 0;
*pp = p;
*width_p = field_width * field_size;
*value_p = value;
return something;
}
static int do_encode(u_char *buff, size_t vec_max, size_t *used,
int (*arg_get)(void *, char *), void *gethook,
char *fmt, va_list ap)
{
int ind;
int shift;
u_char val;
int ret;
int width, value, error;
char c;
int encoded = 0;
char field_name[80];
ind = 0;
shift = 0;
val = 0;
while ((ret = next_field(&fmt,
&c, &width, &value, field_name, sizeof(field_name), &error)))
{
encoded++;
if (ret == 2)
value = arg_get ? (*arg_get)(gethook, field_name) : va_arg(ap, int);
#if 0
printf("do_encode: ret %d fmt %c width %d value %d name \"%s\" error %d\n",
ret, c, width, value, field_name, error);
#endif
if (c == 's') /* Absolute seek */
{
ind = value;
continue;
}
if (width < 8) /* A width of < 8 is a bit field. */
{
/* This is a bit field. We start with the high bits
* so it reads the same as the SCSI spec.
*/
shift += width;
val |= (value << (8 - shift));
if (shift == 8)
{
if (ind < vec_max)
{
buff[ind++] = val;
val = 0;
}
shift = 0;
}
}
else
{
if (shift)
{
if (ind < vec_max)
{
buff[ind++] = val;
val = 0;
}
shift = 0;
}
switch(width)
{
case 8: /* 1 byte integer */
if (ind < vec_max)
buff[ind++] = value;
break;
case 16: /* 2 byte integer */
if (ind < vec_max - 2 + 1)
{
buff[ind++] = value >> 8;
buff[ind++] = value;
}
break;
case 24: /* 3 byte integer */
if (ind < vec_max - 3 + 1)
{
buff[ind++] = value >> 16;
buff[ind++] = value >> 8;
buff[ind++] = value;
}
break;
case 32: /* 4 byte integer */
if (ind < vec_max - 4 + 1)
{
buff[ind++] = value >> 24;
buff[ind++] = value >> 16;
buff[ind++] = value >> 8;
buff[ind++] = value;
}
break;
default:
fprintf(stderr, "do_encode: Illegal width\n");
break;
}
}
}
/* Flush out any remaining bits
*/
if (shift && ind < vec_max)
{
buff[ind++] = val;
val = 0;
}
if (used)
*used = ind;
if (error)
return -1;
return encoded;
}
/* XXX: Should be a constant in scsiio.h
*/
#define CMD_BUFLEN 16
scsireq_t *scsireq_build(scsireq_t *scsireq,
u_long datalen, caddr_t databuf, u_long flags,
char *cmd_spec, ...)
{
int cmdlen;
va_list ap;
if (scsireq == 0)
return 0;
scsireq_reset(scsireq);
if (databuf)
{
scsireq->databuf = databuf;
scsireq->datalen = datalen;
scsireq->flags = flags;
}
else if (datalen)
{
/* XXX: Good way to get a memory leak. Perhaps this should be
* removed.
*/
if ( (scsireq->databuf = malloc(datalen)) == 0)
return 0;
scsireq->datalen = datalen;
scsireq->flags = flags;
}
va_start(ap, cmd_spec);
if (do_encode(scsireq->cmd, CMD_BUFLEN, &cmdlen, 0, 0, cmd_spec, ap) == -1)
return 0;
scsireq->cmdlen = cmdlen;
return scsireq;
}
scsireq_t
*scsireq_build_visit(scsireq_t *scsireq,
u_long datalen, caddr_t databuf, u_long flags, char *cmd_spec,
int (*arg_get)(void *hook, char *field_name), void *gethook)
{
int cmdlen;
va_list ap = (va_list) 0;
if (scsireq == 0)
return 0;
scsireq_reset(scsireq);
if (databuf)
{
scsireq->databuf = databuf;
scsireq->datalen = datalen;
scsireq->flags = flags;
}
else if (datalen)
{
/* XXX: Good way to get a memory leak. Perhaps this should be
* removed.
*/
if ( (scsireq->databuf = malloc(datalen)) == 0)
return 0;
scsireq->datalen = datalen;
scsireq->flags = flags;
}
if (do_encode(scsireq->cmd, CMD_BUFLEN, &cmdlen, arg_get, gethook,
cmd_spec, ap) == -1)
return 0;
scsireq->cmdlen = cmdlen;
return scsireq;
}
int scsireq_encode(scsireq_t *scsireq, char *fmt, ...)
{
va_list ap;
if (scsireq == 0)
return 0;
va_start(ap, fmt);
return do_encode(scsireq->databuf,
scsireq->datalen, 0, 0, 0, fmt, ap);
}
int scsireq_encode_visit(scsireq_t *scsireq, char *fmt,
int (*arg_get)(void *hook, char *field_name), void *gethook)
{
va_list ap = (va_list)0;
return do_encode(scsireq->databuf, scsireq->datalen, 0,
arg_get, gethook, fmt, ap);
}
FILE *scsi_debug_output(char *s)
{
if (s == 0)
behave.db_f = 0;
else
{
behave.db_f = fopen(s, "w");
if (behave.db_f == 0)
behave.db_f = stderr;
}
return behave.db_f;
}
#define SCSI_TRUNCATE -1
typedef struct scsi_assoc
{
int code;
char *text;
} scsi_assoc_t;
static scsi_assoc_t retsts[] =
{
{ SCCMD_OK, "No error" },
{ SCCMD_TIMEOUT, "Command Timeout" },
{ SCCMD_BUSY, "Busy" },
{ SCCMD_SENSE, "Sense Returned" },
{ SCCMD_UNKNOWN, "Unknown return status" },
{ 0, 0 }
};
static char *scsi_assoc_text(int code, scsi_assoc_t *tab)
{
while (tab->text)
{
if (tab->code == code)
return tab->text;
tab++;
}
return "Unknown code";
}
void scsi_dump(FILE *f, char *text, u_char *p, int req, int got, int dump_print)
{
int i;
int trunc = 0;
if (f == 0 || req == 0)
return;
fprintf(f, "%s (%d of %d):\n", text, got, req);
if (behave.db_trunc != -1 && got > behave.db_trunc)
{
trunc = 1;
got = behave.db_trunc;
}
for (i = 0; i < got; i++)
{
fprintf(f, "%02x", p[i]);
putc(' ', f);
if ((i % 16) == 15 || i == got - 1)
{
int j;
if (dump_print)
{
fprintf(f, " # ");
for (j = i - 15; j <= i; j++)
putc((isprint(p[j]) ? p[j] : '.'), f);
putc('\n', f);
}
else
putc('\n', f);
}
}
fprintf(f, "%s", (trunc) ? "(truncated)...\n" : "\n");
}
/* XXX: sense_7x_dump and scsi_sense dump was just sort of
* grabbed out of the old ds
* library and not really merged in carefully. It should use the
* new buffer decoding stuff.
*/
/* Get unsigned long.
*/
static u_long g_u_long(u_char *s)
{
return (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
}
/* In the old software you could patch in a special error table:
*/
scsi_assoc_t *error_table = 0;
static void sense_7x_dump(FILE *f, scsireq_t *scsireq)
{
int code;
u_char *s = (u_char *)scsireq->sense;
int valid = (*s) & 0x80;
u_long val;
static scsi_assoc_t sense[] = {
{ 0, "No sense" },
{ 1, "Recovered error" },
{ 2, "Not Ready" },
{ 3, "Medium error" },
{ 4, "Hardware error" },
{ 5, "Illegal request" },
{ 6, "Unit attention" },
{ 7, "Data protect" },
{ 8, "Blank check" },
{ 9, "Vendor specific" },
{ 0xa, "Copy aborted" },
{ 0xb, "Aborted Command" },
{ 0xc, "Equal" },
{ 0xd, "Volume overflow" },
{ 0xe, "Miscompare" },
{ 0, 0 },
};
static scsi_assoc_t code_tab[] = {
{0x70, "current errors"},
{0x71, "deferred errors"},
};
fprintf(f, "Error code is \"%s\"\n", scsi_assoc_text(s[0]&0x7F, code_tab));
fprintf(f, "Segment number is %02x\n", s[1]);
if (s[2] & 0x20)
fprintf(f, "Incorrect Length Indicator is set.\n");
fprintf(f, "Sense key is \"%s\"\n", scsi_assoc_text(s[2] & 0x7, sense));
val = g_u_long(s + 3);
fprintf(f, "The Information field is%s %08lx (%ld).\n",
valid ? "" : " not valid but contains", (long)val, (long)val);
val = g_u_long(s + 8);
fprintf(f, "The Command Specific Information field is %08lx (%ld).\n",
(long)val, (long)val);
fprintf(f, "Additional sense code: %02x\n", s[12]);
fprintf(f, "Additional sense code qualifier: %02x\n", s[13]);
code = (s[12] << 8) | s[13];
if (error_table)
fprintf(f, "%s\n", scsi_assoc_text(code, error_table));
if (s[15] & 0x80)
{
if ((s[2] & 0x7) == 0x05) /* Illegal request */
{
int byte;
u_char value, bit;
fprintf(f, "Illegal parameter in the %s.\n",
(s[15] & 0x40) ? "parameter list" : "command descriptor block");
byte = ((s[16] << 8) | s[17]);
value = (u_char)scsireq->cmd[byte];
bit = s[15] & 0x7;
if (s[15] & 0x08)
fprintf(f, "Bit %d of byte %d (value %02x) is illegal.\n",
bit, byte, value);
else
fprintf(f, "Byte %d (value %02x) is illegal.\n", byte, value);
}
else
{
fprintf(f, "Sense Key Specific (valid but not illegal request):\n");
fprintf(f,
"%02x %02x %02x\n", s[15] & 0x7f, s[16], s[17]);
}
}
}
/* scsi_sense_dump: Dump the sense portion of the scsireq structure.
*/
void scsi_sense_dump(FILE *f, scsireq_t *scsireq)
{
u_char *s = (u_char *)scsireq->sense;
int code = (*s) & 0x7f;
if (scsireq->senselen_used == 0)
{
fprintf(f, "No sense sent.\n");
return;
}
#if 0
if (!valid)
fprintf(f, "The sense data is not valid.\n");
#endif
switch(code)
{
case 0x70:
case 0x71:
sense_7x_dump(f, scsireq);
break;
default:
fprintf(f, "No sense dump for error code %02x.\n", code);
scsi_dump(f, "sense", s, scsireq->senselen, scsireq->senselen_used, 0);
}
}
void scsi_retsts_dump(FILE *f, scsireq_t *scsireq)
{
if (scsireq->retsts == 0)
return;
fprintf(f, "return status %d (%s)",
scsireq->retsts, scsi_assoc_text(scsireq->retsts, retsts));
switch(scsireq->retsts)
{
case SCCMD_TIMEOUT:
fprintf(f, " after %ld ms", scsireq->timeout);
break;
default:
break;
}
}
int scsi_debug(FILE *f, int ret, scsireq_t *scsireq)
{
char *d;
if (f == 0)
return 0;
fprintf(f, "SCIOCCOMMAND ioctl");
if (ret == 0)
fprintf(f, ": Command accepted.");
else
{
if (ret != -1)
fprintf(f, ", return value %d?", ret);
if (errno)
{
fprintf(f, ": %s", strerror(errno));
errno = 0;
}
}
fputc('\n', f);
if (ret == 0 && (scsireq->status || scsireq->retsts || behave.db_level))
{
scsi_retsts_dump(f, scsireq);
if (scsireq->status)
fprintf(f, " host adapter status %d\n", scsireq->status);
if (scsireq->flags & SCCMD_READ)
d = "Data in";
else if (scsireq->flags & SCCMD_WRITE)
d = "Data out";
else
d = "No data transfer?";
if (scsireq->cmdlen == 0)
fprintf(f, "Zero length command????\n");
scsi_dump(f, "Command out",
(u_char *)scsireq->cmd, scsireq->cmdlen, scsireq->cmdlen, 0);
scsi_dump(f, d,
(u_char *)scsireq->databuf, scsireq->datalen,
scsireq->datalen_used, 1);
scsi_sense_dump(f, scsireq);
}
fflush(f);
return ret;
}
static char *debug_output;
int scsi_open(const char *path, int flags)
{
int fd = open(path, flags);
if (fd != -1)
{
char *p;
debug_output = getenv("SU_DEBUG_OUTPUT");
(void)scsi_debug_output(debug_output);
if ((p = getenv("SU_DEBUG_LEVEL")))
sscanf(p, "%d", &behave.db_level);
if ((p = getenv("SU_DEBUG_TRUNCATE")))
sscanf(p, "%d", &behave.db_trunc);
else
behave.db_trunc = SCSI_TRUNCATE;
}
return fd;
}
int scsireq_enter(int fid, scsireq_t *scsireq)
{
int ret;
if (scsireq == 0)
return EFAULT;
ret = ioctl(fid, SCIOCCOMMAND, (void *)scsireq);
if (behave.db_f) scsi_debug(behave.db_f, ret, scsireq);
return ret;
}
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