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#include <stdio.h>
#include <stdlib.h>
#include <unistd.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"
/* 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 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.
*/
static char * version_str = "0.16 20070714";
static int debug = 0;
#define TRESPASS_PAGE 0x22
static int do_trespass(int fd, int hr, int short_cmd)
{
unsigned char 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 */
};
unsigned char 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;
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, 1 /* pf */, 0 /* sp */,
short_trespass_pg, sizeof(short_trespass_pg),
1, (debug ? 2 : 0));
else
res = sg_ll_mode_select10(fd, 1 /* pf */, 0 /* sp */,
long_trespass_pg, sizeof(long_trespass_pg),
1, (debug ? 2 : 0));
switch (res) {
case 0:
if (debug)
fprintf(stderr, "%s trespass successful\n",
short_cmd ? "short" : "long");
break;
case SG_LIB_CAT_INVALID_OP:
case SG_LIB_CAT_ILLEGAL_REQ:
fprintf(stderr, "%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:
fprintf(stderr, "device not ready\n");
break;
case SG_LIB_CAT_UNIT_ATTENTION:
fprintf(stderr, "unit attention\n");
break;
default:
if (debug)
fprintf(stderr, "%s trespass failed\n",
short_cmd ? "short" : "long");
break;
}
return res;
}
void usage ()
{
fprintf(stderr, "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.*)\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;
int hr = 0;
int short_cmd = 0;
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 = 1;
else if (!strcmp (*argptr, "-hr"))
hr = 1;
else if (!strcmp (*argptr, "-V")) {
printf("Version string: %s\n", version_str);
exit(0);
}
else if (*argv[k] == '-') {
fprintf(stderr, "Unrecognized switch: %s\n", argv[k]);
file_name = 0;
break;
}
else if (0 == file_name)
file_name = argv[k];
else {
fprintf(stderr, "too many arguments\n");
file_name = 0;
break;
}
}
if (0 == file_name) {
usage();
return SG_LIB_SYNTAX_ERROR;
}
fd = open(file_name, O_RDWR | O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "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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