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/* The program allows the user to send a trespass command to change the
* LUN ownership from one Service-Processor to this one on an EMC
* CLARiiON and potentially other devices.
*
* Copyright (C) 2004-2018 Lars Marowsky-Bree <lmb@suse.de>
*
* Based on sg_start.c; credits from there also apply.
* Minor modifications for sg_lib, D. Gilbert 2004/10/19
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "sg_lib.h"
#include "sg_cmds_basic.h"
#include "sg_pr2serr.h"
static const char * version_str = "0.23 20180219";
static int debug = 0;
#define TRESPASS_PAGE 0x22
static int
do_trespass(int fd, bool hr, bool short_cmd)
{
uint8_t long_trespass_pg[] =
{ 0, 0, 0, 0, 0, 0, 0, 0x00,
TRESPASS_PAGE, /* Page code */
0x09, /* Page length - 2 */
0x81, /* Trespass code + Honor reservation
* bit */
0xff, 0xff, /* Trespass target */
0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */
};
uint8_t short_trespass_pg[] =
{ 0, 0, 0, 0,
TRESPASS_PAGE, /* Page code */
0x02, /* Page length - 2 */
0x81, /* Trespass code + Honor reservation
* bit */
0xff, /* Trespass target */
};
int res;
char b[80];
if (hr) { /* override Trespass code + Honor reservation bit */
short_trespass_pg[6] = 0x01;
long_trespass_pg[10] = 0x01;
}
if (short_cmd)
res = sg_ll_mode_select6(fd, true /* pf */, false /* sp */,
short_trespass_pg, sizeof(short_trespass_pg),
true, (debug ? 2 : 0));
else
res = sg_ll_mode_select10(fd, true /* pf */, false /* sp */,
long_trespass_pg, sizeof(long_trespass_pg),
true, (debug ? 2 : 0));
switch (res) {
case 0:
if (debug)
pr2serr("%s trespass successful\n",
short_cmd ? "short" : "long");
break;
case SG_LIB_CAT_INVALID_OP:
case SG_LIB_CAT_ILLEGAL_REQ:
pr2serr("%s form trepass page failed, try again %s '-s' "
"option\n", short_cmd ? "short" : "long",
short_cmd ? "without" : "with");
break;
case SG_LIB_CAT_NOT_READY:
pr2serr("device not ready\n");
break;
case SG_LIB_CAT_UNIT_ATTENTION:
pr2serr("unit attention\n");
break;
default:
sg_get_category_sense_str(res, sizeof(b), b, debug);
pr2serr("%s trespass failed: %s\n",
(short_cmd ? "short" : "long"), b);
break;
}
return res;
}
void usage ()
{
pr2serr("Usage: sg_emc_trespass [-d] [-hr] [-s] [-V] DEVICE\n"
" Change ownership of a LUN from another SP to this one.\n"
" EMC CLARiiON CX-/AX-family + FC5300/FC4500/FC4700.\n"
" -d : output debug\n"
" -hr: Set Honor Reservation bit\n"
" -s : Send Short Trespass Command page (default: long)\n"
" (for FC series)\n"
" -V: print version string then exit\n"
" DEVICE sg or block device (latter in lk 2.6 or lk 3 "
"series)\n"
" Example: sg_emc_trespass /dev/sda\n");
exit (1);
}
int main(int argc, char * argv[])
{
char **argptr;
char * file_name = 0;
int k, fd;
bool hr = false;
bool short_cmd = false;
int ret = 0;
if (argc < 2)
usage ();
for (k = 1; k < argc; ++k) {
argptr = argv + k;
if (!strcmp (*argptr, "-d"))
++debug;
else if (!strcmp (*argptr, "-s"))
short_cmd = true;
else if (!strcmp (*argptr, "-hr"))
hr = true;
else if (!strcmp (*argptr, "-V")) {
printf("Version string: %s\n", version_str);
exit(0);
}
else if (*argv[k] == '-') {
pr2serr("Unrecognized switch: %s\n", argv[k]);
file_name = NULL;
break;
}
else if (NULL == file_name)
file_name = argv[k];
else {
pr2serr("too many arguments\n");
file_name = NULL;
break;
}
}
if (NULL == file_name) {
usage();
return SG_LIB_SYNTAX_ERROR;
}
fd = open(file_name, O_RDWR | O_NONBLOCK);
if (fd < 0) {
pr2serr("Error trying to open %s\n", file_name);
perror("");
usage();
return SG_LIB_FILE_ERROR;
}
ret = do_trespass(fd, hr, short_cmd);
close (fd);
return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
}
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