freebsd-dev/sbin/scsi/scsi.c

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/*
* Written By Julian ELischer
* Copyright julian Elischer 1993.
* Permission is granted to use or redistribute this file in any way as long
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* as this notice remains. Julian Elischer does not guarantee that this file
* is totally correct for any given task and users of this file must
* accept responsibility for any damage that occurs from the application of this
* file.
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*
* (julian@tfs.com julian@dialix.oz.au)
*
* User SCSI hooks added by Peter Dufault:
*
* Copyright (c) 1994 HD Associates
* (contact: dufault@hda.com)
* All rights reserved.
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*
* 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. The name of HD Associates
* may not be used to endorse or promote products derived from this software
* without specific prior written permission.
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*
* 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 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 1.9 1995/07/11 09:21:33 dufault Exp $
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/scsiio.h>
#include <sys/file.h>
#include <scsi.h>
#include <ctype.h>
#include <signal.h>
int fd;
int debuglevel;
int debugflag;
int commandflag;
int reprobe;
int probe_all;
int verbose = 0;
int bus = -1; /* all busses */
int targ = -1; /* all targs */
int lun = 0; /* just lun 0 */
int freeze = 0; /* Freeze this many seconds */
int modeflag;
int editflag;
int modepage = 0; /* Read this mode page */
int pagectl = 0; /* Mode sense page control */
int seconds = 2;
void usage(void)
{
printf(
"Usage:\n"
"\n"
" scsi -f device -d debug_level # To set debug level\n"
" scsi -f device [-v] -z seconds # To freeze bus\n"
" scsi -f device -m page [-P pc] # To read mode pages\n"
" scsi -f device -p [-b bus] [-l lun] # To probe all devices\n"
" scsi -f device -r [-b bus] [-t targ] [-l lun] # To reprobe a device\n"
" scsi -f device [-v] [-s seconds] -c cmd_fmt [arg0 ... argn] # A command...\n"
" -o count out_fmt [arg0 ... argn] # EITHER (data out)\n"
" -i count in_fmt # OR (data in)\n"
"\n"
"\"out_fmt\" can be \"-\" to read output data from stdin;\n"
"\"in_fmt\" can be \"-\" to write input data to stdout;\n"
"\n"
"If debugging is not compiled in the kernel, \"-d\" will have no effect\n"
);
exit (1);
}
void procargs(int *argc_p, char ***argv_p)
{
int argc = *argc_p;
char **argv = *argv_p;
extern char *optarg;
extern int optind;
int fflag,
ch;
fflag = 0;
commandflag = 0;
debugflag = 0;
while ((ch = getopt(argc, argv, "ceprvf:d:b:t:l:z:m:P:s:")) != EOF) {
switch (ch) {
case 'p':
probe_all = 1;
break;
case 'r':
reprobe = 1;
break;
case 'c':
commandflag = 1;
break;
case 'v':
verbose = 1;
break;
case 'e':
editflag = 1;
break;
case 'f':
if ((fd = scsi_open(optarg, O_RDWR)) < 0) {
(void) fprintf(stderr,
"%s: unable to open device %s: %s\n",
argv[0], optarg, strerror(errno));
exit(errno);
}
fflag = 1;
break;
case 'd':
debuglevel = strtol(optarg, 0, 0);
debugflag = 1;
break;
case 'b':
bus = strtol(optarg, 0, 0);
break;
case 't':
targ = strtol(optarg, 0, 0);
break;
case 'l':
lun = strtol(optarg, 0, 0);
break;
case 'z':
freeze = strtol(optarg, 0, 0);
break;
case 'P':
pagectl = strtol(optarg, 0, 0);
break;
case 's':
seconds = strtol(optarg, 0, 0);
break;
case 'm':
modeflag = 1;
modepage = strtol(optarg, 0, 0);
break;
case '?':
default:
usage();
}
}
*argc_p = argc - optind;
*argv_p = argv + optind;
if (!fflag) usage();
}
/* get_hook: Structure for evaluating args in a callback.
*/
struct get_hook
{
int argc;
char **argv;
int got;
};
/* iget: Integer argument callback
*/
int iget(void *hook, char *name)
{
struct get_hook *h = (struct get_hook *)hook;
int arg;
if (h->got >= h->argc)
{
fprintf(stderr, "Expecting an integer argument.\n");
usage();
}
arg = strtol(h->argv[h->got], 0, 0);
h->got++;
if (verbose && name && *name)
printf("%s: %d\n", name, arg);
return arg;
}
/* cget: char * argument callback
*/
char *cget(void *hook, char *name)
{
struct get_hook *h = (struct get_hook *)hook;
char *arg;
if (h->got >= h->argc)
{
fprintf(stderr, "Expecting a character pointer argument.\n");
usage();
}
arg = h->argv[h->got];
h->got++;
if (verbose && name)
printf("cget: %s: %s", name, arg);
return arg;
}
/* arg_put: "put argument" callback
*/
void arg_put(void *hook, int letter, void *arg, int count, char *name)
{
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if (verbose && name && *name)
printf("%s: ", name);
switch(letter)
{
case 'i':
case 'b':
printf("%d ", (int)arg);
break;
case 'c':
case 'z':
{
char *p = malloc(count + 1);
p[count] = 0;
strncpy(p, (char *)arg, count);
if (letter == 'z')
{
int i;
for (i = count - 1; i >= 0; i--)
if (p[i] == ' ')
p[i] = 0;
else
break;
}
printf("%s ", p);
}
break;
default:
printf("Unknown format letter: '%c'\n", letter);
}
if (verbose)
putchar('\n');
}
int arg_get (void *hook, char *field_name)
{
printf("get \"%s\".\n", field_name);
return 0;
}
/* data_phase: SCSI bus data phase: DATA IN, DATA OUT, or no data transfer.
*/
enum data_phase {none = 0, in, out};
/* do_cmd: Send a command to a SCSI device
*/
static void
do_cmd(int fd, char *fmt, int argc, char **argv)
{
struct get_hook h;
scsireq_t *scsireq = scsireq_new();
enum data_phase data_phase;
int count;
char *data_fmt;
h.argc = argc;
h.argv = argv;
h.got = 0;
scsireq_reset(scsireq);
scsireq_build_visit(scsireq, 0, 0, 0, fmt, iget, (void *)&h);
/* Three choices here:
* 1. We've used up all the args and have no data phase.
* 2. We have input data ("-i")
* 3. We have output data ("-o")
*/
if (h.got >= h.argc)
{
data_phase = none;
count = scsireq->datalen = 0;
}
else
{
char *flag = cget(&h, 0);
if (strcmp(flag, "-o") == 0)
{
data_phase = out;
scsireq->flags = SCCMD_WRITE;
}
else if (strcmp(flag, "-i") == 0)
{
data_phase = in;
scsireq->flags = SCCMD_READ;
}
else
{
fprintf(stderr,
"Need either \"-i\" or \"-o\" for data phase; not \"%s\".\n", flag);
usage();
}
count = scsireq->datalen = iget(&h, 0);
if (count)
{
data_fmt = cget(&h, 0);
scsireq->databuf = malloc(count);
if (data_phase == out)
{
if (strcmp(data_fmt, "-") == 0) /* Read data from stdin */
{
if (read(0, scsireq->databuf, count) != count)
{
perror("read");
exit(errno);
}
}
else
{
bzero(scsireq->databuf, count);
scsireq_encode_visit(scsireq, data_fmt, iget, (void *)&h);
}
}
}
}
scsireq->timeout = seconds * 1000;
if (scsireq_enter(fd, scsireq) == -1)
{
scsi_debug(stderr, -1, scsireq);
exit(errno);
}
if (SCSIREQ_ERROR(scsireq))
scsi_debug(stderr, 0, scsireq);
if (count && data_phase == in)
{
if (strcmp(data_fmt, "-") == 0) /* stdout */
{
if (write(1, scsireq->databuf, count) != count)
{
perror("write");
exit(errno);
}
}
else
{
scsireq_decode_visit(scsireq, data_fmt, arg_put, 0);
putchar('\n');
}
}
}
static void
freeze_ioctl(int fd, int op, void *data)
{
if (ioctl(fd, SCIOCFREEZE, 0) == -1) {
if (errno == ENODEV) {
fprintf(stderr,
"Your kernel must be configured with option SCSI_FREEZE.\n");
}
else
perror("SCIOCFREEZE");
exit(errno);
}
}
/* do_freeze: Freeze the bus for a given number of seconds.
*/
static void do_freeze(int seconds)
{
if (seconds == -1) {
printf("Hit return to thaw: ");
fflush(stdout);
sync();
freeze_ioctl(fd, SCIOCFREEZE, 0);
(void)getchar();
freeze_ioctl(fd, SCIOCTHAW, 0);
}
else {
sync();
freeze_ioctl(fd, SCIOCFREEZETHAW, &seconds);
if (verbose) {
putchar('\007');
fflush(stdout);
}
freeze_ioctl(fd, SCIOCWAITTHAW, 0);
if (verbose) {
putchar('\007');
fflush(stdout);
}
}
}
void mode_sense(int fd, u_char *data, int len, int pc, int page)
{
scsireq_t *scsireq;
bzero(data, len);
scsireq = scsireq_new();
if (scsireq_enter(fd, scsireq_build(scsireq,
len, data, SCCMD_READ,
"1A 0 v:2 {Page Control} v:6 {Page Code} 0 v:i1 {Allocation Length} 0",
pc, page, len)) == -1) /* Mode sense */
{
scsi_debug(stderr, -1, scsireq);
exit(errno);
}
if (SCSIREQ_ERROR(scsireq))
{
scsi_debug(stderr, 0, scsireq);
exit(-1);
}
free(scsireq);
}
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void mode_select(int fd, u_char *data, int len, int perm)
{
scsireq_t *scsireq;
scsireq = scsireq_new();
if (scsireq_enter(fd, scsireq_build(scsireq,
len, data, SCCMD_WRITE,
"15 0:7 v:1 {SP} 0 0 v:i1 {Allocation Length} 0", perm, len)) == -1) /* Mode select */
{
scsi_debug(stderr, -1, scsireq);
exit(errno);
}
if (SCSIREQ_ERROR(scsireq))
{
scsi_debug(stderr, 0, scsireq);
exit(-1);
}
free(scsireq);
}
#define START_ENTRY '{'
#define END_ENTRY '}'
static void
skipwhite(FILE *f)
{
int c;
skip_again:
while (isspace(c = getc(f)))
;
if (c == '#') {
while ((c = getc(f)) != '\n' && c != EOF)
;
goto skip_again;
}
ungetc(c, f);
}
/* mode_lookup: Lookup a format description for a given page.
*/
char *mode_db = "/usr/share/misc/scsi_modes";
static char *mode_lookup(int page)
{
char *new_db;
FILE *modes;
int match, next, found, c;
static char fmt[1024]; /* XXX This should be with strealloc */
int page_desc;
new_db = getenv("SCSI_MODES");
if (new_db)
mode_db = new_db;
modes = fopen(mode_db, "r");
if (modes == 0)
return 0;
next = 0;
found = 0;
while (!found) {
skipwhite(modes);
if (fscanf(modes, "%i", &page_desc) != 1)
break;
if (page_desc == page)
found = 1;
skipwhite(modes);
if (getc(modes) != START_ENTRY) {
fprintf(stderr, "Expected %c.\n", START_ENTRY);
exit(-1);
}
match = 1;
while (match != 0) {
c = getc(modes);
if (c == EOF) {
fprintf(stderr, "Expected %c.\n", END_ENTRY);
}
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if (c == START_ENTRY) {
match++;
}
if (c == END_ENTRY) {
match--;
if (match == 0)
break;
}
if (found && c != '\n') {
if (next >= sizeof(fmt)) {
fprintf(stderr, "Stupid program: Buffer overflow.\n");
exit(ENOMEM);
}
fmt[next++] = (u_char)c;
}
}
}
fmt[next] = 0;
return (found) ? fmt : 0;
}
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/* -------- edit: Mode Select Editor ---------
*/
struct editinfo
{
int can_edit;
int default_value;
} editinfo[64]; /* XXX Bogus fixed size */
static int editind;
volatile int edit_opened;
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static FILE *edit_file;
static char edit_name[L_tmpnam];
static inline void
edit_rewind(void)
{
editind = 0;
}
static void
edit_done(void)
{
int opened;
sigset_t all, prev;
sigfillset(&all);
(void)sigprocmask(SIG_SETMASK, &all, &prev);
opened = (int)edit_opened;
edit_opened = 0;
(void)sigprocmask(SIG_SETMASK, &prev, 0);
if (opened)
{
if (fclose(edit_file))
perror(edit_name);
if (unlink(edit_name))
perror(edit_name);
}
}
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static void
edit_init(void)
{
edit_rewind();
if (tmpnam(edit_name) == 0) {
perror("tmpnam failed");
exit(errno);
}
if ( (edit_file = fopen(edit_name, "w")) == 0) {
perror(edit_name);
exit(errno);
}
edit_opened = 1;
atexit(edit_done);
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}
static void
edit_check(void *hook, int letter, void *arg, int count, char *name)
{
if (letter != 'i' && letter != 'b') {
fprintf(stderr, "Can't edit format %c.\n", letter);
exit(-1);
}
if (editind >= sizeof(editinfo) / sizeof(editinfo[0])) {
fprintf(stderr, "edit table overflow\n");
exit(ENOMEM);
}
editinfo[editind].can_edit = ((int)arg != 0);
editind++;
}
static void
edit_defaults(void *hook, int letter, void *arg, int count, char *name)
{
if (letter != 'i' && letter != 'b') {
fprintf(stderr, "Can't edit format %c.\n", letter);
exit(-1);
}
editinfo[editind].default_value = ((int)arg);
editind++;
}
static void
edit_report(void *hook, int letter, void *arg, int count, char *name)
{
if (editinfo[editind].can_edit) {
if (letter != 'i' && letter != 'b') {
fprintf(stderr, "Can't report format %c.\n", letter);
exit(-1);
}
fprintf(edit_file, "%s: %d\n", name, (int)arg);
}
editind++;
}
static int
edit_get(void *hook, char *name)
{
struct get_hook *h = (struct get_hook *)hook;
int arg = editinfo[editind].default_value;
if (editinfo[editind].can_edit) {
char line[80];
if (fgets(line, sizeof(line), edit_file) == 0) {
perror("fgets");
exit(errno);
}
line[strlen(line) - 1] = 0;
if (strncmp(name, line, strlen(name)) != 0) {
fprintf(stderr, "Expected \"%s\" and read \"%s\"\n",
name, line);
exit(-1);
}
arg = strtoul(line + strlen(name) + 2, 0, 0);
}
editind++;
return arg;
}
static void
edit_edit(void)
{
char *system_line;
char *editor = getenv("EDITOR");
if (!editor)
editor = "vi";
fclose(edit_file);
system_line = malloc(strlen(editor) + strlen(edit_name) + 6);
sprintf(system_line, "%s %s", editor, edit_name);
system(system_line);
free(system_line);
if ( (edit_file = fopen(edit_name, "r")) == 0) {
perror(edit_name);
exit(errno);
}
}
static void
mode_edit(int fd, int page, int edit, int argc, char *argv[])
{
int i;
u_char data[255];
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u_char *mode_pars;
struct mode_header
{
u_char mdl; /* Mode data length */
u_char medium_type;
u_char dev_spec_par;
u_char bdl; /* Block descriptor length */
};
struct mode_page_header
{
u_char page_code;
u_char page_length;
};
struct mode_header *mh;
struct mode_page_header *mph;
char *fmt = mode_lookup(page);
if (!fmt && verbose) {
fprintf(stderr,
"No mode data base entry in \"%s\" for page %d; binary %s only.\n",
mode_db, page, (edit ? "edit" : "display"));
}
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if (edit) {
if (!fmt) {
fprintf(stderr, "Sorry: can't edit without a format.\n");
exit(-1);
}
if (pagectl != 0 && pagectl != 3) {
fprintf(stderr,
"It only makes sense to edit page 0 (current) or page 3 (saved values)\n");
exit(-1);
}
verbose = 1;
mode_sense(fd, data, sizeof(data), 1, page);
mh = (struct mode_header *)data;
mph = (struct mode_page_header *)
(((char *)mh) + sizeof(*mh) + mh->bdl);
mode_pars = (char *)mph + sizeof(*mph);
edit_init();
scsireq_buff_decode_visit(mode_pars, mh->mdl,
fmt, edit_check, 0);
mode_sense(fd, data, sizeof(data), 0, page);
edit_rewind();
scsireq_buff_decode_visit(mode_pars, mh->mdl,
fmt, edit_defaults, 0);
edit_rewind();
scsireq_buff_decode_visit(mode_pars, mh->mdl,
fmt, edit_report, 0);
edit_edit();
edit_rewind();
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scsireq_buff_encode_visit(mode_pars, mh->mdl,
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fmt, edit_get, 0);
/* Eliminate block descriptors:
*/
bcopy((char *)mph, ((char *)mh) + sizeof(*mh),
sizeof(*mph) + mph->page_length);
mh->bdl = 0;
mph = (struct mode_page_header *) (((char *)mh) + sizeof(*mh));
mode_pars = ((char *)mph) + 2;
#if 0
/* Turn this on to see what you're sending to the
* device:
*/
edit_rewind();
scsireq_buff_decode_visit(mode_pars,
mh->mdl, fmt, arg_put, 0);
#endif
edit_done();
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/* Make it permanent if pageselect is three.
*/
mph->page_code &= ~0xC0; /* Clear PS and RESERVED */
mh->mdl = 0; /* Reserved for mode select */
mode_select(fd, (char *)mh,
sizeof(*mh) + mh->bdl + sizeof(*mph) + mph->page_length,
(pagectl == 3));
exit(0);
}
mode_sense(fd, data, sizeof(data), pagectl, page);
/* Skip over the block descriptors.
*/
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mh = (struct mode_header *)data;
mph = (struct mode_page_header *)(((char *)mh) + sizeof(*mh) + mh->bdl);
mode_pars = (char *)mph + sizeof(*mph);
if (!fmt) {
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for (i = 0; i < mh->mdl; i++) {
printf("%02x%c",mode_pars[i],
(((i + 1) % 8) == 0) ? '\n' : ' ');
}
putc('\n', stdout);
} else {
verbose = 1;
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scsireq_buff_decode_visit(mode_pars,
mh->mdl, fmt, arg_put, 0);
}
}
/* do_probe_all: Loop over all SCSI IDs and see if something is
* there. This only does BUS 0 LUN 0.
*/
void do_probe_all(void)
{
scsireq_t *scsireq;
char vendor_id[8 + 1], product_id[16 + 1], revision[4 + 1];
int id;
u_char *inq_buf = malloc(96);
struct scsi_addr addr;
scsireq = scsireq_build(scsireq_new(),
96, inq_buf, SCCMD_READ,
"12 0 0 0 v 0", 96);
addr.scbus = (bus == -1) ? 0 : bus;
addr.lun = lun;
if (addr.scbus || addr.lun)
{
printf("For bus %d lun %d:\n", addr.scbus, addr.lun);
}
for (id = 0; id < 8; id++)
{
addr.target = id;
printf("%d: ", id);
if (ioctl(fd, SCIOCADDR, &addr) == -1) {
if (errno == ENXIO)
{
errno = 0;
printf("nothing.\n");
}
else
printf("SCIOCADDR: %s\n", strerror(errno));
continue;
}
if (scsireq_enter(fd, scsireq) == -1) {
printf("scsireq_enter: %s\n", strerror(errno));
continue;
}
vendor_id[sizeof(vendor_id) - 1] = 0;
product_id[sizeof(product_id) - 1] = 0;
revision[sizeof(revision) - 1] = 0;
scsireq_decode(scsireq, "s8 c8 c16 c4",
vendor_id, product_id, revision);
printf("%s %s %s\n", vendor_id, product_id, revision);
}
}
void main(int argc, char **argv)
{
struct scsi_addr scaddr;
procargs(&argc,&argv);
/* XXX This has grown to the point that it should be cleaned up.
*/
if (freeze) {
do_freeze(freeze);
} else if (probe_all) {
do_probe_all();
} else if(reprobe) {
scaddr.scbus = bus;
scaddr.target = targ;
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scaddr.lun = lun;
if (ioctl(fd,SCIOCREPROBE,&scaddr) == -1)
perror("ioctl");
} else if(debugflag) {
if (ioctl(fd,SCIOCDEBUG,&debuglevel) == -1)
{
perror("ioctl [SCIODEBUG]");
exit(1);
}
} else if (commandflag) {
int i;
char *fmt;
if (argc < 1) {
fprintf(stderr, "Need the command format string.\n");
usage();
}
fmt = argv[0];
argc -= 1;
argv += 1;
do_cmd(fd, fmt, argc, argv);
} else if (modeflag) {
mode_edit(fd, modepage, editflag, argc, argv);
}
exit(0);
}