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Diffstat (limited to 'src/sg_emc_trespass.c')
| -rw-r--r-- | src/sg_emc_trespass.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/sg_emc_trespass.c b/src/sg_emc_trespass.c new file mode 100644 index 00000000..146e26b2 --- /dev/null +++ b/src/sg_emc_trespass.c @@ -0,0 +1,176 @@ +/* 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; +} |