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smartmontools/smartmontools/scsicmds.h

558 lines
22 KiB

/*
* scsicmds.h
*
* Home page of code is: https://www.smartmontools.org
*
* Copyright (C) 2002-8 Bruce Allen
* Copyright (C) 2000 Michael Cornwell <cornwell@acm.org>
* Copyright (C) 2003-18 Douglas Gilbert <dgilbert@interlog.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
*
* N.B. What was formerly known as "SMART" are now called "informational
* exceptions" in recent t10.org drafts (i.e. recent SCSI).
*
*/
#ifndef SCSICMDS_H_
#define SCSICMDS_H_
#define SCSICMDS_H_CVSID "$Id$\n"
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
/* #define SCSI_DEBUG 1 */ /* Comment out to disable command debugging */
/* Following conditional defines just in case OS already has them defined.
* If they are defined we hope they are defined correctly (for SCSI). */
#ifndef TEST_UNIT_READY
#define TEST_UNIT_READY 0x0
#endif
#ifndef LOG_SELECT
#define LOG_SELECT 0x4c
#endif
#ifndef LOG_SENSE
#define LOG_SENSE 0x4d
#endif
#ifndef MODE_SENSE_6
#define MODE_SENSE_6 0x1a
#endif
#ifndef MODE_SENSE_10
#define MODE_SENSE_10 0x5a
#endif
#ifndef MODE_SELECT_6
#define MODE_SELECT_6 0x15
#endif
#ifndef MODE_SELECT_10
#define MODE_SELECT_10 0x55
#endif
#ifndef INQUIRY
#define INQUIRY 0x12
#endif
#ifndef REQUEST_SENSE
#define REQUEST_SENSE 0x03
#endif
#ifndef RECEIVE_DIAGNOSTIC
#define RECEIVE_DIAGNOSTIC 0x1c
#endif
#ifndef SEND_DIAGNOSTIC
#define SEND_DIAGNOSTIC 0x1d
#endif
#ifndef READ_DEFECT_10
#define READ_DEFECT_10 0x37
#endif
#ifndef READ_DEFECT_12
#define READ_DEFECT_12 0xb7
#endif
#ifndef START_STOP_UNIT /* SSU */
#define START_STOP_UNIT 0x1b
#endif
#ifndef REPORT_LUNS
#define REPORT_LUNS 0xa0
#endif
#ifndef READ_CAPACITY_10
#define READ_CAPACITY_10 0x25
#endif
#ifndef SERVICE_ACTION_IN_16
#define SERVICE_ACTION_IN_16 0x9e
#endif
#ifndef SAI_READ_CAPACITY_16 /* service action in for READ_CAPACITY_16 */
#define SAI_READ_CAPACITY_16 0x10
#endif
#ifndef SAI_GET_PHY_ELEM_STATUS /* Get physical element status */
#define SAI_GET_PHY_ELEM_STATUS 0x17
#endif
#ifndef MAINTENANCE_IN_12
#define MAINTENANCE_IN_12 0xa3
#endif
#ifndef MI_REP_SUP_OPCODES
#define MI_REP_SUP_OPCODES 0xc /* maintenance in (12) */
#endif
#ifndef SAT_ATA_PASSTHROUGH_12
#define SAT_ATA_PASSTHROUGH_12 0xa1
#endif
#ifndef SAT_ATA_PASSTHROUGH_16
#define SAT_ATA_PASSTHROUGH_16 0x85
#endif
#define DXFER_NONE 0
#define DXFER_FROM_DEVICE 1
#define DXFER_TO_DEVICE 2
/* scsi_rsoc_elem and scsi_device is defined in dev_interface.h */
struct scsi_cmnd_io
{
uint8_t * cmnd; /* [in]: ptr to SCSI command block (cdb) */
size_t cmnd_len; /* [in]: number of bytes in SCSI command */
int dxfer_dir; /* [in]: DXFER_NONE, DXFER_FROM_DEVICE, or
DXFER_TO_DEVICE */
uint8_t * dxferp; /* [in]: ptr to outgoing or incoming data buffer */
size_t dxfer_len; /* [in]: bytes to be transferred to/from dxferp */
uint8_t * sensep; /* [in]: ptr to sense buffer, filled when
CHECK CONDITION status occurs */
size_t max_sense_len; /* [in]: max number of bytes to write to sensep */
unsigned timeout; /* [in]: seconds, 0-> default timeout (60 seconds?) */
size_t resp_sense_len; /* [out]: sense buffer length written */
uint8_t scsi_status; /* [out]: 0->ok, 2->CHECK CONDITION, etc ... */
int resid; /* [out]: Number of bytes requested to be transferred
less actual number transferred (0 if not
supported) */
};
struct scsi_sense_disect {
uint8_t resp_code;
uint8_t sense_key;
uint8_t asc;
uint8_t ascq;
int progress; /* -1 -> N/A, 0-65535 -> available */
};
/* Useful data from Informational Exception Control mode page (0x1c) */
#define SCSI_IECMP_RAW_LEN 64
struct scsi_iec_mode_page {
uint8_t requestedCurrent;
uint8_t gotCurrent;
uint8_t requestedChangeable;
uint8_t gotChangeable;
uint8_t modese_len; /* 0 (don't know), 6 or 10 */
uint8_t raw_curr[SCSI_IECMP_RAW_LEN];
uint8_t raw_chg[SCSI_IECMP_RAW_LEN];
};
/* Carrier for Error counter log pages (e.g. read, write, verify ...) */
struct scsiErrorCounter {
uint8_t gotPC[7];
uint8_t gotExtraPC;
uint64_t counter[8];
};
/* Carrier for Non-medium error log page */
struct scsiNonMediumError {
uint8_t gotPC0;
uint8_t gotExtraPC;
uint64_t counterPC0;
uint8_t gotTFE_H;
uint64_t counterTFE_H; /* Track following errors [Hitachi] */
uint8_t gotPE_H;
uint64_t counterPE_H; /* Positioning errors [Hitachi] */
};
struct scsi_readcap_resp {
uint64_t num_lblocks; /* Number of Logical Blocks on device */
uint32_t lb_size; /* should be available in all non-error cases */
/* following fields from READ CAPACITY(16) or set to 0 */
uint8_t prot_type; /* 0, 1, 2 or 3 protection type, deduced from
* READ CAPACITY(16) P_TYPE and PROT_EN fields */
uint8_t p_i_exp; /* Protection information Intervals Exponent */
uint8_t lb_p_pb_exp;/* Logical Blocks per Physical Block Exponent */
bool lbpme; /* Logical Block Provisioning Management Enabled */
bool lbprz; /* Logical Block Provisioning Read Zeros */
uint16_t l_a_lba; /* Lowest Aligned Logical Block Address */
};
struct scsi_supp_log_pages {
uint8_t page_code;
uint8_t subpage_code;
};
/* SCSI Peripheral types (of interest) */
#define SCSI_PT_DIRECT_ACCESS 0x0
#define SCSI_PT_SEQUENTIAL_ACCESS 0x1
#define SCSI_PT_WO 0x4 /* write once device */
#define SCSI_PT_CDROM 0x5
#define SCSI_PT_OPTICAL 0x7
#define SCSI_PT_MEDIUM_CHANGER 0x8
#define SCSI_PT_ENCLOSURE 0xd
#define SCSI_PT_RBC 0xe
#define SCSI_PT_HOST_MANAGED 0x14 /* Zoned disk */
/* Transport protocol identifiers or just Protocol identifiers */
#define SCSI_TPROTO_FCP 0
#define SCSI_TPROTO_SPI 1
#define SCSI_TPROTO_SSA 2
#define SCSI_TPROTO_1394 3
#define SCSI_TPROTO_SRP 4 /* SCSI over RDMA */
#define SCSI_TPROTO_ISCSI 5
#define SCSI_TPROTO_SAS 6
#define SCSI_TPROTO_ADT 7
#define SCSI_TPROTO_ATA 8
#define SCSI_TPROTO_UAS 9 /* USB attached SCSI */
#define SCSI_TPROTO_SOP 0xa /* SCSI over PCIe */
#define SCSI_TPROTO_PCIE 0xb /* includes NVMe */
#define SCSI_TPROTO_NONE 0xf
/* SCSI Log Pages retrieved by LOG SENSE. 0x0 to 0x3f, 0x30 to 0x3e vendor */
#define SUPPORTED_LPAGES 0x00
#define BUFFER_OVERRUN_LPAGE 0x01
#define WRITE_ERROR_COUNTER_LPAGE 0x02
#define READ_ERROR_COUNTER_LPAGE 0x03
#define READ_REVERSE_ERROR_COUNTER_LPAGE 0x04
#define VERIFY_ERROR_COUNTER_LPAGE 0x05
#define NON_MEDIUM_ERROR_LPAGE 0x06
#define LAST_N_ERROR_EVENTS_LPAGE 0x07
#define FORMAT_STATUS_LPAGE 0x08
#define LAST_N_DEFERRED_LPAGE 0x0b /* or async events */
#define LB_PROV_LPAGE 0x0c /* SBC-3 */
#define TEMPERATURE_LPAGE 0x0d
#define STARTSTOP_CYCLE_COUNTER_LPAGE 0x0e
#define APPLICATION_CLIENT_LPAGE 0x0f
#define SELFTEST_RESULTS_LPAGE 0x10
#define SS_MEDIA_LPAGE 0x11 /* SBC-3 */
#define DEVICE_STATS_LPAGE 0x14 /* SSC-5 */
#define BACKGROUND_RESULTS_LPAGE 0x15 /* SBC-3 */
#define ATA_PT_RESULTS_LPAGE 0x16 /* SAT */
#define NONVOL_CACHE_LPAGE 0x17 /* SBC-3 */
#define PROTOCOL_SPECIFIC_LPAGE 0x18
#define GEN_STATS_PERF_LPAGE 0x19
#define POWER_COND_TRANS_LPAGE 0x1a
#define IE_LPAGE 0x2f
/* SCSI Log subpages (8 bits), added spc4r05 2006, standardized SPC-4 2015 */
#define NO_SUBPAGE_L_SPAGE 0x0 /* 0x0-0x3f,0x0 */
#define LAST_N_INQ_DAT_L_SPAGE 0x1 /* 0xb,0x1 */
#define LAST_N_MODE_PG_L_SPAGE 0x2 /* 0xb,0x2 */
#define ENVIRO_REP_L_SPAGE 0x1 /* 0xd,0x1 */
#define ENVIRO_LIMITS_L_SPAGE 0x2 /* 0xd,0x2 */
#define UTILIZATION_L_SPAGE 0x1 /* 0xe,0x1 */
#define ZB_DEV_STATS_L_SPAGE 0x1 /* 0x14,0x1 */
#define PEND_DEFECTS_L_SPAGE 0x1 /* 0x15,0x1 */
#define BACKGROUND_OP_L_SPAGE 0x2 /* 0x15,0x2 */
#define LPS_MISALIGN_L_SPAGE 0x3 /* 0x15,0x3 */
#define SUPP_SPAGE_L_SPAGE 0xff /* 0x0,0xff pages+subpages */
/* Seagate vendor specific log pages. */
#define SEAGATE_CACHE_LPAGE 0x37
#define SEAGATE_FACTORY_LPAGE 0x3e
/* Log page response lengths */
#define LOG_RESP_SELF_TEST_LEN 0x194
/* See the SSC-2 document at www.t10.org . Earlier note: From IBM
Documentation, see http://www.storage.ibm.com/techsup/hddtech/prodspecs.htm */
#define TAPE_ALERTS_LPAGE 0x2e
/* ANSI SCSI-3 Mode Pages */
#define VENDOR_UNIQUE_PAGE 0x00
#define READ_WRITE_ERROR_RECOVERY_PAGE 0x01
#define DISCONNECT_RECONNECT_PAGE 0x02
#define FORMAT_DEVICE_PAGE 0x03
#define RIGID_DISK_DRIVE_GEOMETRY_PAGE 0x04
#define FLEXIBLE_DISK_PAGE 0x05
#define VERIFY_ERROR_RECOVERY_PAGE 0x07
#define CACHING_PAGE 0x08
#define PERIPHERAL_DEVICE_PAGE 0x09
#define XOR_CONTROL_MODE_PAGE 0x10
#define CONTROL_MODE_PAGE 0x0a
#define MEDIUM_TYPES_SUPPORTED_PAGE 0x0b
#define NOTCH_PAGE 0x0c
#define CD_DEVICE_PAGE 0x0d
#define CD_AUDIO_CONTROL_PAGE 0x0e
#define DATA_COMPRESSION_PAGE 0x0f
#define ENCLOSURE_SERVICES_MANAGEMENT_PAGE 0x14
#define PROTOCOL_SPECIFIC_LUN_PAGE 0x18
#define PROTOCOL_SPECIFIC_PORT_PAGE 0x19
#define POWER_CONDITION_PAGE 0x1a
#define INFORMATIONAL_EXCEPTIONS_CONTROL_PAGE 0x1c
#define FAULT_FAILURE_REPORTING_PAGE 0x1c
/* Background control mode subpage is [0x1c,0x1] */
#define BACKGROUND_CONTROL_M_SUBPAGE 0x1 /* SBC-2 */
#define ALL_MODE_PAGES 0x3f
/* Mode page control field */
#define MPAGE_CONTROL_CURRENT 0
#define MPAGE_CONTROL_CHANGEABLE 1
#define MPAGE_CONTROL_DEFAULT 2
#define MPAGE_CONTROL_SAVED 3
/* SCSI Vital Product Data (VPD) pages */
#define SCSI_VPD_SUPPORTED_VPD_PAGES 0x0
#define SCSI_VPD_UNIT_SERIAL_NUMBER 0x80
#define SCSI_VPD_DEVICE_IDENTIFICATION 0x83
#define SCSI_VPD_EXTENDED_INQUIRY_DATA 0x86
#define SCSI_VPD_ATA_INFORMATION 0x89
#define SCSI_VPD_POWER_CONDITION 0x8a
#define SCSI_VPD_POWER_CONSUMPTION 0x8d
#define SCSI_VPD_BLOCK_LIMITS 0xb0
#define SCSI_VPD_BLOCK_DEVICE_CHARACTERISTICS 0xb1
#define SCSI_VPD_LOGICAL_BLOCK_PROVISIONING 0xb2
#define SCSI_VPD_ZONED_BLOCK_DEV_CHAR 0xb6
/* defines for useful SCSI Status codes */
#define SCSI_STATUS_CHECK_CONDITION 0x2
/* defines for useful Sense Key codes */
#define SCSI_SK_NO_SENSE 0x0
#define SCSI_SK_RECOVERED_ERR 0x1
#define SCSI_SK_NOT_READY 0x2
#define SCSI_SK_MEDIUM_ERROR 0x3
#define SCSI_SK_HARDWARE_ERROR 0x4
#define SCSI_SK_ILLEGAL_REQUEST 0x5
#define SCSI_SK_UNIT_ATTENTION 0x6
#define SCSI_SK_DATA_PROTECT 0x7
#define SCSI_SK_ABORTED_COMMAND 0xb
#define SCSI_SK_MISCOMPARE 0xe
#define SCSI_SK_COMPLETED 0xf
/* defines for useful Additional Sense Codes (ASCs) */
#define SCSI_ASC_NOT_READY 0x4 /* more info in ASCQ code */
#define SCSI_ASC_NO_MEDIUM 0x3a /* more info in ASCQ code */
#define SCSI_ASC_UNKNOWN_OPCODE 0x20
#define SCSI_ASC_INVALID_FIELD 0x24
#define SCSI_ASC_UNKNOWN_PARAM 0x26
#define SCSI_ASC_WARNING 0xb
#define SCSI_ASC_IMPENDING_FAILURE 0x5d
#define SCSI_ASCQ_ATA_PASS_THROUGH 0x1d
/* Simplified error code (negative values as per errno) */
#define SIMPLE_NO_ERROR 0
#define SIMPLE_ERR_NOT_READY 1
#define SIMPLE_ERR_BAD_OPCODE 2
#define SIMPLE_ERR_BAD_FIELD 3 /* in cbd */
#define SIMPLE_ERR_BAD_PARAM 4 /* in data */
#define SIMPLE_ERR_BAD_RESP 5 /* response fails sanity */
#define SIMPLE_ERR_NO_MEDIUM 6 /* no medium present */
#define SIMPLE_ERR_BECOMING_READY 7 /* device will be ready soon */
#define SIMPLE_ERR_TRY_AGAIN 8 /* some warning, try again */
#define SIMPLE_ERR_MEDIUM_HARDWARE 9 /* medium or hardware error */
#define SIMPLE_ERR_UNKNOWN 10 /* unknown sense value */
#define SIMPLE_ERR_ABORTED_COMMAND 11 /* probably transport error */
#define SIMPLE_ERR_PROTECTION 12 /* data protect sense key */
#define SIMPLE_ERR_MISCOMPARE 13 /* from VERIFY commands */
/* defines for functioncode parameter in SENDDIAGNOSTIC function */
#define SCSI_DIAG_NO_SELF_TEST 0x00
#define SCSI_DIAG_DEF_SELF_TEST 0xff
#define SCSI_DIAG_BG_SHORT_SELF_TEST 0x01
#define SCSI_DIAG_BG_EXTENDED_SELF_TEST 0x02
#define SCSI_DIAG_FG_SHORT_SELF_TEST 0x05
#define SCSI_DIAG_FG_EXTENDED_SELF_TEST 0x06
#define SCSI_DIAG_ABORT_SELF_TEST 0x04
/* Defines for power_cond in scsiSetPowerCondition() (SSU command) */
#define SCSI_POW_COND_ACTIVE 0x1
#define SCSI_POW_COND_IDLE 0x2
#define SCSI_POW_COND_STANDBY 0x3
/* SCSI command timeout values (units are seconds) */
#define SCSI_TIMEOUT_DEFAULT 60 // should be longer than the spin up time
// of a disk in JBOD.
#define SCSI_TIMEOUT_SELF_TEST (5 * 60 * 60) /* allow max 5 hours for */
/* extended foreground self test */
#define LOGPAGEHDRSIZE 4
class scsi_device;
// Set of supported SCSI VPD pages. Constructor fetches Supported VPD pages
// VPD page and remembers the response for later queries.
class supported_vpd_pages
{
public:
explicit supported_vpd_pages(scsi_device * device);
bool is_supported(int vpd_page_num) const;
private:
int num_valid; /* 0 or less for invalid */
unsigned char pages[256];
};
extern supported_vpd_pages * supported_vpd_pages_p;
/* This is a heuristic that takes into account the command bytes and length
* to decide whether the presented unstructured sequence of bytes could be
* a SCSI command. If so it returns true otherwise false. Vendor specific
* SCSI commands (i.e. opcodes from 0xc0 to 0xff), if presented, are assumed
* to follow SCSI conventions (i.e. length of 6, 10, 12 or 16 bytes). The
* only SCSI commands considered above 16 bytes of length are the Variable
* Length Commands (opcode 0x7f) and the XCDB wrapped commands (opcode 0x7e).
* Both have an inbuilt length field which can be cross checked with clen.
* No NVMe commands (64 bytes long plus some extra added by some OSes) have
* opcodes 0x7e or 0x7f yet. ATA is register based but SATA has FIS
* structures that are sent across the wire. The FIS register structure is
* used to move a command from a SATA host to device, but the ATA 'command'
* is not the first byte. So it is harder to say what will happen if a
* FIS structure is presented as a SCSI command, hopefully there is a low
* probability this function will yield true in that case. */
bool is_scsi_cdb(const uint8_t * cdbp, int clen);
// Print SCSI debug messages?
extern unsigned char scsi_debugmode;
void scsi_do_sense_disect(const struct scsi_cmnd_io * in,
struct scsi_sense_disect * out);
int scsiSimpleSenseFilter(const struct scsi_sense_disect * sinfo);
const char * scsiErrString(int scsiErr);
/* Yield string associated with sense_key value. Returns 'buff'. */
char * scsi_get_sense_key_str(int sense_key, int buff_len, char * buff);
int scsi_vpd_dev_id_iter(const unsigned char * initial_desig_desc,
int page_len, int * off, int m_assoc,
int m_desig_type, int m_code_set);
int scsi_decode_lu_dev_id(const unsigned char * b, int blen, char * s,
int slen, int * transport);
/* STANDARD SCSI Commands */
int scsiTestUnitReady(scsi_device * device);
int scsiStdInquiry(scsi_device * device, uint8_t *pBuf, int bufLen);
int scsiInquiryVpd(scsi_device * device, int vpd_page, uint8_t *pBuf,
int bufLen);
int scsiLogSense(scsi_device * device, int pagenum, int subpagenum,
uint8_t *pBuf, int bufLen, int known_resp_len);
int scsiLogSelect(scsi_device * device, int pcr, int sp, int pc, int pagenum,
int subpagenum, uint8_t *pBuf, int bufLen);
int scsiModeSense(scsi_device * device, int pagenum, int subpagenum, int pc,
uint8_t *pBuf, int bufLen);
int scsiModeSelect(scsi_device * device, int sp, uint8_t *pBuf, int bufLen);
int scsiModeSense10(scsi_device * device, int pagenum, int subpagenum, int pc,
uint8_t *pBuf, int bufLen);
int scsiModeSelect10(scsi_device * device, int sp, uint8_t *pBuf, int bufLen);
int scsiModePageOffset(const uint8_t * resp, int len, int modese_len);
int scsiRequestSense(scsi_device * device,
struct scsi_sense_disect * sense_info);
int scsiSetPowerCondition(scsi_device * device, int power_cond,
int pcond_modifier = 0);
int scsiSendDiagnostic(scsi_device * device, int functioncode, uint8_t *pBuf,
int bufLen);
bool scsi_pass_through_yield_sense(scsi_device * device, scsi_cmnd_io * iop,
struct scsi_sense_disect & sinfo);
int scsiReadDefect10(scsi_device * device, int req_plist, int req_glist,
int dl_format, uint8_t *pBuf, int bufLen);
int scsiReadDefect12(scsi_device * device, int req_plist, int req_glist,
int dl_format, int addrDescIndex, uint8_t *pBuf,
int bufLen);
int scsiReadCapacity10(scsi_device * device, unsigned int * last_lbp,
unsigned int * lb_sizep);
int scsiReadCapacity16(scsi_device * device, uint8_t *pBuf, int bufLen);
int scsiRSOCcmd(scsi_device * device, uint8_t *pBuf, int bufLen, int & rspLen);
/* SMART specific commands */
int scsiCheckIE(scsi_device * device, int hasIELogPage, int hasTempLogPage,
uint8_t *asc, uint8_t *ascq, uint8_t *currenttemp,
uint8_t *triptemp);
int scsiFetchIECmpage(scsi_device * device, struct scsi_iec_mode_page *iecp,
int modese_len);
int scsi_IsExceptionControlEnabled(const struct scsi_iec_mode_page *iecp);
int scsi_IsWarningEnabled(const struct scsi_iec_mode_page *iecp);
int scsiSetExceptionControlAndWarning(scsi_device * device, int enabled,
const struct scsi_iec_mode_page *iecp);
void scsiDecodeErrCounterPage(unsigned char * resp,
struct scsiErrorCounter *ecp);
void scsiDecodeNonMediumErrPage(unsigned char * resp,
struct scsiNonMediumError *nmep);
int scsiFetchExtendedSelfTestTime(scsi_device * device, int * durationSec,
int modese_len);
int scsiCountFailedSelfTests(scsi_device * device, int noisy);
int scsiSelfTestInProgress(scsi_device * device, int * inProgress);
int scsiFetchControlGLTSD(scsi_device * device, int modese_len, int current);
int scsiSetControlGLTSD(scsi_device * device, int enabled, int modese_len);
int scsiFetchTransportProtocol(scsi_device * device, int modese_len);
int scsiGetRPM(scsi_device * device, int modese_len, int * form_factorp,
int * haw_zbcp);
int scsiGetSetCache(scsi_device * device, int modese_len, short int * wce,
short int * rcd);
uint64_t scsiGetSize(scsi_device * device, bool avoid_rcap16,
struct scsi_readcap_resp * srrp);
/* T10 Standard IE Additional Sense Code strings taken from t10.org */
char * scsiGetIEString(uint8_t asc, uint8_t ascq, char * b, int blen);
int scsiGetTemp(scsi_device * device, uint8_t *currenttemp, uint8_t *triptemp);
int scsiSmartDefaultSelfTest(scsi_device * device);
int scsiSmartShortSelfTest(scsi_device * device);
int scsiSmartExtendSelfTest(scsi_device * device);
int scsiSmartShortCapSelfTest(scsi_device * device);
int scsiSmartExtendCapSelfTest(scsi_device * device);
int scsiSmartSelfTestAbort(scsi_device * device);
const char * scsiTapeAlertsTapeDevice(unsigned short code);
const char * scsiTapeAlertsChangerDevice(unsigned short code);
const char * scsi_get_opcode_name(const uint8_t * cdbp);
void scsi_format_id_string(char * out, const uint8_t * in, int n);
void dStrHex(const uint8_t * up, int len, int no_ascii);
/* Attempt to find the first SCSI sense data descriptor that matches the
given 'desc_type'. If found return pointer to start of sense data
descriptor; otherwise (including fixed format sense data) returns NULL. */
const unsigned char * sg_scsi_sense_desc_find(const unsigned char * sensep,
int sense_len, int desc_type);
/* SCSI command transmission interface function declaration. Its
* definition is target OS specific (see os_<OS>.c file).
* Returns 0 if SCSI command successfully launched and response
* received. Even when 0 is returned the caller should check
* scsi_cmnd_io::scsi_status for SCSI defined errors and warnings
* (e.g. CHECK CONDITION). If the SCSI command could not be issued
* (e.g. device not present or not a SCSI device) or some other problem
* arises (e.g. timeout) then returns a negative errno value. */
// Moved to C++ interface
//int do_scsi_cmnd_io(int dev_fd, struct scsi_cmnd_io * iop, int report);
#endif