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/*
* Copyright (c) 2014-2021 Douglas Gilbert.
* All rights reserved.
* Use of this source code is governed by a BSD-style
* license that can be found in the BSD_LICENSE file.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>
#include <getopt.h>
#define __STDC_FORMAT_MACROS 1
#include <inttypes.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "sg_lib.h"
#include "sg_lib_data.h"
#include "sg_pt.h"
#include "sg_cmds_basic.h"
#include "sg_unaligned.h"
#include "sg_pr2serr.h"
/* A utility program originally written for the Linux OS SCSI subsystem.
*
*
* This program issues the SCSI RESET WRITE POINTER command to the given SCSI
* device. Based on zbc-r04c.pdf .
*/
static const char * version_str = "1.16 20211114";
#define SG_ZONING_OUT_CMDLEN 16
#define RESET_WRITE_POINTER_SA 0x4
#define SENSE_BUFF_LEN 64 /* Arbitrary, could be larger */
#define DEF_PT_TIMEOUT 60 /* 60 seconds */
static struct option long_options[] = {
{"all", no_argument, 0, 'a'},
{"count", required_argument, 0, 'C'},
{"help", no_argument, 0, 'h'},
{"reset-all", no_argument, 0, 'R'},
{"reset_all", no_argument, 0, 'R'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"zone", required_argument, 0, 'z'},
{0, 0, 0, 0},
};
static void
usage()
{
pr2serr("Usage: "
"sg_reset_wp [--all] [--count=ZC] [--help] [--verbose]\n"
" [--version] [--zone=ID] DEVICE\n");
pr2serr(" where:\n"
" --all|-a sets the ALL flag in the cdb\n"
" --count=ZC|-C ZC set zone count field (def: 0)\n"
" --help|-h print out usage message\n"
" --verbose|-v increase verbosity\n"
" --version|-V print version string and exit\n"
" --zone=ID|-z ID ID is the starting LBA of the zone "
"whose\n"
" write pointer is to be reset\n\n"
"Performs a SCSI RESET WRITE POINTER command. ID is decimal by "
"default,\nfor hex use a leading '0x' or a trailing 'h'. "
"Either the --zone=ID\nor --all option needs to be given.\n");
}
/* Invokes a SCSI RESET WRITE POINTER command (ZBC). Return of 0 -> success,
* various SG_LIB_CAT_* positive values or -1 -> other errors */
static int
sg_ll_reset_write_pointer(int sg_fd, uint64_t zid, uint16_t zc, bool all,
bool noisy, int verbose)
{
int ret, res, sense_cat;
uint8_t rwp_cdb[SG_ZONING_OUT_CMDLEN] = {SG_ZONING_OUT,
RESET_WRITE_POINTER_SA, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
uint8_t sense_b[SENSE_BUFF_LEN] SG_C_CPP_ZERO_INIT;
struct sg_pt_base * ptvp;
sg_put_unaligned_be64(zid, rwp_cdb + 2);
sg_put_unaligned_be16(zc, rwp_cdb + 12);
if (all)
rwp_cdb[14] = 0x1;
if (verbose) {
char b[128];
pr2serr(" Reset write pointer cdb: %s\n",
sg_get_command_str(rwp_cdb, SG_ZONING_OUT_CMDLEN, false,
sizeof(b), b));
}
ptvp = construct_scsi_pt_obj();
if (NULL == ptvp) {
pr2serr("Reset write pointer: out of memory\n");
return -1;
}
set_scsi_pt_cdb(ptvp, rwp_cdb, sizeof(rwp_cdb));
set_scsi_pt_sense(ptvp, sense_b, sizeof(sense_b));
res = do_scsi_pt(ptvp, sg_fd, DEF_PT_TIMEOUT, verbose);
ret = sg_cmds_process_resp(ptvp, "reset write pointer", res, noisy,
verbose, &sense_cat);
if (-1 == ret) {
if (get_scsi_pt_transport_err(ptvp))
ret = SG_LIB_TRANSPORT_ERROR;
else
ret = sg_convert_errno(get_scsi_pt_os_err(ptvp));
} else if (-2 == ret) {
switch (sense_cat) {
case SG_LIB_CAT_RECOVERED:
case SG_LIB_CAT_NO_SENSE:
ret = 0;
break;
default:
ret = sense_cat;
break;
}
} else
ret = 0;
destruct_scsi_pt_obj(ptvp);
return ret;
}
int
main(int argc, char * argv[])
{
bool all = false;
bool verbose_given = false;
bool version_given = false;
bool zid_given = false;
int res, c, n;
int sg_fd = -1;
int ret = 0;
int verbose = 0;
uint16_t zc = 0;
uint64_t zid = 0;
int64_t ll;
const char * device_name = NULL;
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "aC:hRvVz:", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'a':
case 'R':
all = true;
break;
case 'C':
n = sg_get_num(optarg);
if ((n < 0) || (n > 0xffff)) {
pr2serr("--count= expects an argument between 0 and 0xffff "
"inclusive\n");
return SG_LIB_SYNTAX_ERROR;
}
zc = (uint16_t)n;
break;
case 'h':
case '?':
usage();
return 0;
case 'v':
verbose_given = true;
++verbose;
break;
case 'V':
version_given = true;
break;
case 'z':
ll = sg_get_llnum(optarg);
if (-1 == ll) {
pr2serr("bad argument to '--zone=ID'\n");
return SG_LIB_SYNTAX_ERROR;
}
zid = (uint64_t)ll;
zid_given = true;
break;
default:
pr2serr("unrecognised option code 0x%x ??\n", c);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
if (optind < argc) {
if (NULL == device_name) {
device_name = argv[optind];
++optind;
}
if (optind < argc) {
for (; optind < argc; ++optind)
pr2serr("Unexpected extra argument: %s\n",
argv[optind]);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
#ifdef DEBUG
pr2serr("In DEBUG mode, ");
if (verbose_given && version_given) {
pr2serr("but override: '-vV' given, zero verbose and continue\n");
verbose_given = false;
version_given = false;
verbose = 0;
} else if (! verbose_given) {
pr2serr("set '-vv'\n");
verbose = 2;
} else
pr2serr("keep verbose=%d\n", verbose);
#else
if (verbose_given && version_given)
pr2serr("Not in DEBUG mode, so '-vV' has no special action\n");
#endif
if (version_given) {
pr2serr("version: %s\n", version_str);
return 0;
}
if ((! zid_given) && (! all)) {
pr2serr("either the --zone=ID or --all option is required\n\n");
usage();
return SG_LIB_CONTRADICT;
}
if (NULL == device_name) {
pr2serr("Missing device name!\n\n");
usage();
return SG_LIB_SYNTAX_ERROR;
}
sg_fd = sg_cmds_open_device(device_name, false /* rw */, verbose);
if (sg_fd < 0) {
int err = -sg_fd;
if (verbose)
pr2serr("open error: %s: %s\n", device_name,
safe_strerror(err));
ret = sg_convert_errno(err);
goto fini;
}
res = sg_ll_reset_write_pointer(sg_fd, zid, zc, all, true, verbose);
ret = res;
if (res) {
if (SG_LIB_CAT_INVALID_OP == res)
pr2serr("Reset write pointer command not supported\n");
else {
char b[80];
sg_get_category_sense_str(res, sizeof(b), b, verbose);
pr2serr("Reset write pointer command: %s\n", b);
}
}
fini:
if (sg_fd >= 0) {
res = sg_cmds_close_device(sg_fd);
if (res < 0) {
pr2serr("close error: %s\n", safe_strerror(-res));
if (0 == ret)
ret = sg_convert_errno(-res);
}
}
if (0 == verbose) {
if (! sg_if_can2stderr("sg_reset_wp failed: ", ret))
pr2serr("Some error occurred, try again with '-v' or '-vv' for "
"more information\n");
}
return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
}
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