| /* |
| * Copyright (c) 2022 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 <errno.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 REPORT DENSITY SUPPORT command to the given |
| * SCSI (tape) device and outputs the response. Based on ssc5r06.pdf |
| */ |
| |
| static const char * version_str = "1.00 20220120"; |
| |
| #define MAX_RDS_BUFF_LEN (64 * 1024 - 1) |
| #define DEF_RDS_BUFF_LEN 4096 |
| |
| #define REPORT_DENSITY_SUPPORT_CMD 0x44 |
| #define REPORT_DENSITY_SUPPORT_CMDLEN 10 |
| |
| #define RDS_DENSITY_DESC_LEN 52 |
| #define RDS_MEDIUM_T_DESC_LEN 56 |
| |
| #define SENSE_BUFF_LEN 64 /* Arbitrary, could be larger */ |
| #define DEF_PT_TIMEOUT 60 /* 60 seconds */ |
| |
| static const char * rds_s = "Report density support"; |
| |
| |
| static struct option long_options[] = { |
| {"help", no_argument, 0, 'h'}, |
| {"hex", no_argument, 0, 'H'}, |
| {"in", required_argument, 0, 'i'}, /* silent, same as --inhex= */ |
| {"inhex", required_argument, 0, 'i'}, |
| {"maxlen", required_argument, 0, 'm'}, |
| {"media", no_argument, 0, 'M'}, /* Media field; byte 1, bit 0 */ |
| {"raw", no_argument, 0, 'r'}, |
| {"readonly", no_argument, 0, 'R'}, |
| {"typem", no_argument, 0, 't'}, /* Medium type field, byte 1, bit 1 */ |
| {"verbose", no_argument, 0, 'v'}, |
| {"version", no_argument, 0, 'V'}, |
| {0, 0, 0, 0}, |
| }; |
| |
| |
| static void |
| usage(void) |
| { |
| pr2serr("Usage: " |
| "sg_rep_density [--help] [--hex] [--inhex=FN] [--maxlen=LEN] " |
| "[--media]\n" |
| " [--raw] [--readonly] [--typem] [--verbose] " |
| "[--version]\n" |
| " DEVICE\n"); |
| pr2serr(" where:\n" |
| " --help|-h prints out this usage message\n" |
| " --hex|-H output response in hexadecimal " |
| "(default); used\n" |
| " twice: hex without addresses at start " |
| "of line\n" |
| " --inhex=FN decode contents of FN, ignore DEVICE\n" |
| " --maxlen=LEN|-m LEN max response length (allocation " |
| "length in cdb)\n" |
| " (def: 512 bytes)\n" |
| " --media|-M report on media in drive (def: report " |
| "on drive)\n" |
| " --raw|-r output response in binary\n" |
| " --readonly|-R open DEVICE read-only (def: read-write)\n" |
| " --typem|-t report medium types (def: density " |
| "codes)\n" |
| " --verbose|-v increase verbosity\n" |
| " --version|-V print version string and exit\n\n" |
| "Sends a SCSI REPORT DENSITY SUPPORT command outputs the " |
| "response in\nASCII hexadecimal or binary. By default it reports " |
| "on density codes supported\nby the drive (LU).\n"); |
| } |
| |
| /* Invokes a SCSI REPORT PROVISIONING INITIALIZATION PATTERN command (SBC). |
| * Return of 0 -> success, various SG_LIB_CAT_* positive values or |
| * -1 -> other errors */ |
| static int |
| sg_ll_report_density(int sg_fd, bool media, bool m_type, void * resp, |
| int mx_resp_len, int * residp, bool noisy, int verbose) |
| { |
| int ret, res, sense_cat; |
| uint8_t rds_cdb[REPORT_DENSITY_SUPPORT_CMDLEN] = |
| {REPORT_DENSITY_SUPPORT_CMD, 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; |
| |
| if (media) |
| rds_cdb[1] |= 0x1; |
| if (m_type) |
| rds_cdb[1] |= 0x2; |
| sg_put_unaligned_be16((uint16_t)mx_resp_len, rds_cdb + 7); |
| if (verbose) { |
| char b[128]; |
| |
| pr2serr(" %s cdb: %s\n", rds_s, |
| sg_get_command_str(rds_cdb, REPORT_DENSITY_SUPPORT_CMDLEN, |
| false, sizeof(b), b)); |
| } |
| ptvp = construct_scsi_pt_obj(); |
| if (NULL == ptvp) { |
| pr2serr("%s: out of memory\n", __func__); |
| return -1; |
| } |
| set_scsi_pt_cdb(ptvp, rds_cdb, sizeof(rds_cdb)); |
| set_scsi_pt_sense(ptvp, sense_b, sizeof(sense_b)); |
| set_scsi_pt_data_in(ptvp, (uint8_t *)resp, mx_resp_len); |
| res = do_scsi_pt(ptvp, sg_fd, DEF_PT_TIMEOUT, verbose); |
| ret = sg_cmds_process_resp(ptvp, rds_s, 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; |
| if (residp) |
| *residp = get_scsi_pt_resid(ptvp); |
| destruct_scsi_pt_obj(ptvp); |
| return ret; |
| } |
| |
| static void |
| decode_medium_type(const uint8_t * up, int num_desc) |
| { |
| int k, j, n, q; |
| |
| for (k = 0; k < num_desc; ++k, up += RDS_MEDIUM_T_DESC_LEN) { |
| if (0 == k) |
| printf("Medium type descriptor%s\n", ((num_desc > 1) ? "s" : "")); |
| printf(" descriptor %d\n", k + 1); |
| printf(" Medium type: %u\n", up[0]); |
| n = up[4]; |
| printf(" Number of density codes: %d\n", n); |
| if (n > 9) |
| n = 9; |
| for (j = 0; j < n; ++j) { |
| q = up[5 + j]; |
| if (q > 0) |
| printf(" Primary density code: %d\n", q); |
| } |
| printf(" Media width: %u\n", sg_get_unaligned_be16(up + 14)); |
| printf(" Medium length: %u\n", sg_get_unaligned_be16(up + 16)); |
| printf(" Assigning organization: %.8s\n", (const char *)(up + 20)); |
| printf(" Medium type name: %.8s\n", (const char *)(up + 28)); |
| printf(" Description: %.20s\n", (const char *)(up + 36)); |
| } |
| } |
| |
| static void |
| decode_density_code(const uint8_t * up, int num_desc) |
| { |
| int k; |
| |
| for (k = 0; k < num_desc; ++k, up += RDS_DENSITY_DESC_LEN) { |
| if (0 == k) |
| printf("Density support data block descriptor%s\n", |
| ((num_desc > 1) ? "s" : "")); |
| printf(" descriptor %d\n", k + 1); |
| printf(" Primary density code: %u\n", up[0]); |
| printf(" Secondary density code: %u\n", up[1]); |
| printf(" WRT: %u\n", !!(0x80 & up[2])); |
| printf(" DUP: %u\n", !!(0x40 & up[2])); |
| printf(" DEFLT: %u\n", !!(0x20 & up[2])); |
| printf(" DLV: %u\n", !!(0x1 & up[2])); |
| printf(" Bits per mm: %u\n", sg_get_unaligned_be24(up + 5)); |
| printf(" Media width: %u\n", sg_get_unaligned_be16(up + 8)); |
| printf(" Tracks: %u\n", sg_get_unaligned_be16(up + 10)); |
| printf(" Capacity: %u\n", sg_get_unaligned_be32(up + 12)); |
| printf(" Assigning organization: %.8s\n", (const char *)(up + 16)); |
| printf(" Density name: %.8s\n", (const char *)(up + 24)); |
| printf(" Description: %.20s\n", (const char *)(up + 32)); |
| } |
| } |
| |
| static void |
| dStrRaw(const uint8_t * str, int len) |
| { |
| int k; |
| |
| for (k = 0; k < len; ++k) |
| printf("%c", str[k]); |
| } |
| |
| |
| int |
| main(int argc, char * argv[]) |
| { |
| bool do_raw = false; |
| bool media = false; |
| bool m_type = false; |
| bool no_final_msg = false; |
| bool o_readonly = false; |
| bool verbose_given = false; |
| bool version_given = false; |
| int res, c, rlen, desc_len, ads_len, num_desc; |
| int resid = 0; |
| int sg_fd = -1; |
| int do_help = 0; |
| int do_hex = 0; |
| int maxlen = 0; |
| int in_len = 0; |
| int ret = 0; |
| int verbose = 0; |
| const char * device_name = NULL; |
| const char * inhex_fn = NULL; |
| uint8_t * rdsBuff = NULL; |
| uint8_t * free_rds = NULL; |
| char b[80]; |
| |
| while (1) { |
| int option_index = 0; |
| |
| c = getopt_long(argc, argv, "hHi:m:MrRtvV", long_options, |
| &option_index); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'h': |
| case '?': |
| ++do_help; |
| break; |
| case 'H': |
| ++do_hex; |
| break; |
| case 'i': |
| inhex_fn = optarg; |
| break; |
| case 'm': |
| maxlen = sg_get_num(optarg); |
| if ((maxlen < 0) || (maxlen > MAX_RDS_BUFF_LEN)) { |
| pr2serr("argument to '--maxlen' should be %d or less\n", |
| MAX_RDS_BUFF_LEN); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| break; |
| case 'M': |
| media = true; |
| break; |
| case 'r': |
| do_raw = true; |
| break; |
| case 'R': |
| o_readonly = true; |
| break; |
| case 't': |
| m_type = true; |
| break; |
| case 'v': |
| verbose_given = true; |
| ++verbose; |
| break; |
| case 'V': |
| version_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 (do_help) { |
| usage(); |
| return 0; |
| } |
| if (device_name && inhex_fn) { |
| pr2serr("ignoring DEVICE, best to give DEVICE or --inhex=FN, but " |
| "not both\n"); |
| device_name = NULL; |
| } |
| if (0 == maxlen) |
| maxlen = DEF_RDS_BUFF_LEN; |
| rdsBuff = (uint8_t *)sg_memalign(maxlen, 0, &free_rds, verbose > 3); |
| if (NULL == rdsBuff) { |
| pr2serr("unable to sg_memalign %d bytes\n", maxlen); |
| return sg_convert_errno(ENOMEM); |
| } |
| if (NULL == device_name) { |
| if (inhex_fn) { |
| if ((ret = sg_f2hex_arr(inhex_fn, do_raw, false, rdsBuff, |
| &in_len, maxlen))) { |
| if (SG_LIB_LBA_OUT_OF_RANGE == ret) { |
| no_final_msg = true; |
| pr2serr("... decode what we have, --maxlen=%d needs to " |
| "be increased\n", maxlen); |
| } else |
| goto the_end; |
| } |
| if (verbose > 2) |
| pr2serr("Read %d [0x%x] bytes of user supplied data\n", |
| in_len, in_len); |
| if (do_raw) |
| do_raw = false; /* otherwise interferes with decoding */ |
| if (in_len < 4) { |
| pr2serr("--inhex=%s only decoded %d bytes (needs 4 at " |
| "least)\n", inhex_fn, in_len); |
| ret = SG_LIB_SYNTAX_ERROR; |
| goto the_end; |
| } |
| res = 0; |
| maxlen = in_len; |
| goto start_response; |
| } else { |
| pr2serr("missing device name!\n\n"); |
| usage(); |
| ret = SG_LIB_FILE_ERROR; |
| no_final_msg = true; |
| goto the_end; |
| } |
| } else |
| in_len = 0; |
| |
| if (do_raw) { |
| if (sg_set_binary_mode(STDOUT_FILENO) < 0) { |
| perror("sg_set_binary_mode"); |
| ret = SG_LIB_FILE_ERROR; |
| no_final_msg = true; |
| goto the_end; |
| } |
| } |
| |
| sg_fd = sg_cmds_open_device(device_name, o_readonly, verbose); |
| if (sg_fd < 0) { |
| if (verbose) |
| pr2serr("open error: %s: %s\n", device_name, |
| safe_strerror(-sg_fd)); |
| ret = sg_convert_errno(-sg_fd); |
| goto the_end; |
| } |
| |
| res = sg_ll_report_density(sg_fd, media, m_type, rdsBuff, maxlen, &resid, |
| true, verbose); |
| start_response: |
| ret = res; |
| if (0 == res) { |
| rlen = maxlen - resid; |
| if (rlen < 4) { |
| pr2serr("Response length (%d) too short\n", rlen); |
| ret = SG_LIB_CAT_MALFORMED; |
| goto the_end; |
| } |
| if (do_raw) { |
| dStrRaw(rdsBuff, rlen); |
| goto the_end; |
| } |
| if (do_hex) { |
| if (2 != do_hex) |
| hex2stdout(rdsBuff, rlen, ((1 == do_hex) ? 1 : -1)); |
| else |
| hex2stdout(rdsBuff, rlen, 0); |
| goto the_end; |
| } |
| desc_len = m_type ? RDS_MEDIUM_T_DESC_LEN : RDS_DENSITY_DESC_LEN; |
| ads_len = sg_get_unaligned_be16(rdsBuff + 0) + 2; |
| if (4 == ads_len) |
| goto the_end; |
| if (ads_len < 4) { |
| pr2serr("Badly formatted response, ads_len=%d\n", ads_len - 2); |
| ret = SG_LIB_CAT_MALFORMED; |
| goto the_end; |
| } |
| if (ads_len > rlen) { |
| if (verbose) |
| pr2serr("Trimming response from %d to %d bytes\n", ads_len, |
| rlen); |
| ads_len = rlen; |
| if (4 == ads_len) |
| goto the_end; |
| } |
| num_desc = (ads_len - 4) / desc_len; |
| if (0 != ((ads_len - 4) % desc_len)) { |
| if (verbose) |
| pr2serr("Truncating response to %d descriptors\n", num_desc); |
| } |
| if (m_type) |
| decode_medium_type(rdsBuff + 4, num_desc); |
| else |
| decode_density_code(rdsBuff + 4, num_desc); |
| } else if (SG_LIB_CAT_INVALID_OP == res) |
| pr2serr("%s command not supported\n", rds_s); |
| else { |
| sg_get_category_sense_str(res, sizeof(b), b, verbose); |
| pr2serr("%s command: %s\n", rds_s, b); |
| } |
| |
| the_end: |
| if (free_rds) |
| free(free_rds); |
| 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) && (! no_final_msg)) { |
| if (! sg_if_can2stderr("sg_rep_density failed: ", ret)) |
| pr2serr("Some error occurred, try again with '-v' " |
| "or '-vv' for more information\n"); |
| } |
| return (ret >= 0) ? ret : SG_LIB_CAT_OTHER; |
| } |
