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41af878b96
xemu/scsi/utils.c
Hannes Reinecke 41af878b96 scsi: Rename linux-specific SG_ERR codes to generic SCSI_HOST error codes 
We really should make a distinction between legitimate sense codes
(ie if one is running against an emulated block device or for
pass-through sense codes), and the intermediate errors generated
during processing of the command, which really are not sense codes
but refer to some specific internal status. And this internal
state is not necessarily linux-specific, but rather can refer to
the qemu implementation itself.
So rename the linux-only SG_ERR codes to SCSI_HOST codes and make
them available generally.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Message-Id: <20201116184041.60465-5-hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-03-06 11:41:54 +01:00

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/*
* SCSI helpers
*
* Copyright 2017 Red Hat, Inc.
*
* Authors:
* Fam Zheng <famz@redhat.com>
* Paolo Bonzini <pbonzini@redhat.com>
*
* 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 of the License, or (at your option)
* any later version.
*/
#include "qemu/osdep.h"
#include "scsi/constants.h"
#include "scsi/utils.h"
#include "qemu/bswap.h"
uint32_t scsi_data_cdb_xfer(uint8_t *buf)
{
if ((buf[0] >> 5) == 0 && buf[4] == 0) {
return 256;
} else {
return scsi_cdb_xfer(buf);
}
}
uint32_t scsi_cdb_xfer(uint8_t *buf)
{
switch (buf[0] >> 5) {
case 0:
return buf[4];
case 1:
case 2:
return lduw_be_p(&buf[7]);
case 4:
return ldl_be_p(&buf[10]) & 0xffffffffULL;
case 5:
return ldl_be_p(&buf[6]) & 0xffffffffULL;
default:
return -1;
}
}
uint64_t scsi_cmd_lba(SCSICommand *cmd)
{
uint8_t *buf = cmd->buf;
uint64_t lba;
switch (buf[0] >> 5) {
case 0:
lba = ldl_be_p(&buf[0]) & 0x1fffff;
break;
case 1:
case 2:
case 5:
lba = ldl_be_p(&buf[2]) & 0xffffffffULL;
break;
case 4:
lba = ldq_be_p(&buf[2]);
break;
default:
lba = -1;
}
return lba;
}
int scsi_cdb_length(uint8_t *buf)
{
int cdb_len;
switch (buf[0] >> 5) {
case 0:
cdb_len = 6;
break;
case 1:
case 2:
cdb_len = 10;
break;
case 4:
cdb_len = 16;
break;
case 5:
cdb_len = 12;
break;
default:
cdb_len = -1;
}
return cdb_len;
}
SCSISense scsi_parse_sense_buf(const uint8_t *in_buf, int in_len)
{
bool fixed_in;
SCSISense sense;
assert(in_len > 0);
fixed_in = (in_buf[0] & 2) == 0;
if (fixed_in) {
if (in_len < 14) {
return SENSE_CODE(IO_ERROR);
}
sense.key = in_buf[2];
sense.asc = in_buf[12];
sense.ascq = in_buf[13];
} else {
if (in_len < 4) {
return SENSE_CODE(IO_ERROR);
}
sense.key = in_buf[1];
sense.asc = in_buf[2];
sense.ascq = in_buf[3];
}
return sense;
}
int scsi_build_sense_buf(uint8_t *out_buf, size_t size, SCSISense sense,
bool fixed_sense)
{
int len;
uint8_t buf[SCSI_SENSE_LEN] = { 0 };
if (fixed_sense) {
buf[0] = 0x70;
buf[2] = sense.key;
buf[7] = 10;
buf[12] = sense.asc;
buf[13] = sense.ascq;
len = 18;
} else {
buf[0] = 0x72;
buf[1] = sense.key;
buf[2] = sense.asc;
buf[3] = sense.ascq;
len = 8;
}
len = MIN(len, size);
memcpy(out_buf, buf, len);
return len;
}
int scsi_build_sense(uint8_t *buf, SCSISense sense)
{
return scsi_build_sense_buf(buf, SCSI_SENSE_LEN, sense, true);
}
/*
* Predefined sense codes
*/
/* No sense data available */
const struct SCSISense sense_code_NO_SENSE = {
.key = NO_SENSE , .asc = 0x00 , .ascq = 0x00
};
/* LUN not ready, Manual intervention required */
const struct SCSISense sense_code_LUN_NOT_READY = {
.key = NOT_READY, .asc = 0x04, .ascq = 0x03
};
/* LUN not ready, Medium not present */
const struct SCSISense sense_code_NO_MEDIUM = {
.key = NOT_READY, .asc = 0x3a, .ascq = 0x00
};
/* LUN not ready, medium removal prevented */
const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = {
.key = NOT_READY, .asc = 0x53, .ascq = 0x02
};
/* Hardware error, internal target failure */
const struct SCSISense sense_code_TARGET_FAILURE = {
.key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00
};
/* Illegal request, invalid command operation code */
const struct SCSISense sense_code_INVALID_OPCODE = {
.key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00
};
/* Illegal request, LBA out of range */
const struct SCSISense sense_code_LBA_OUT_OF_RANGE = {
.key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00
};
/* Illegal request, Invalid field in CDB */
const struct SCSISense sense_code_INVALID_FIELD = {
.key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00
};
/* Illegal request, Invalid field in parameter list */
const struct SCSISense sense_code_INVALID_PARAM = {
.key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00
};
/* Illegal request, Invalid value in parameter list */
const struct SCSISense sense_code_INVALID_PARAM_VALUE = {
.key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x01
};
/* Illegal request, Parameter list length error */
const struct SCSISense sense_code_INVALID_PARAM_LEN = {
.key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00
};
/* Illegal request, LUN not supported */
const struct SCSISense sense_code_LUN_NOT_SUPPORTED = {
.key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00
};
/* Illegal request, Saving parameters not supported */
const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = {
.key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00
};
/* Illegal request, Incompatible medium installed */
const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = {
.key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00
};
/* Illegal request, medium removal prevented */
const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = {
.key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02
};
/* Illegal request, Invalid Transfer Tag */
const struct SCSISense sense_code_INVALID_TAG = {
.key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01
};
/* Command aborted, I/O process terminated */
const struct SCSISense sense_code_IO_ERROR = {
.key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06
};
/* Command aborted, I_T Nexus loss occurred */
const struct SCSISense sense_code_I_T_NEXUS_LOSS = {
.key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07
};
/* Command aborted, Logical Unit failure */
const struct SCSISense sense_code_LUN_FAILURE = {
.key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01
};
/* Command aborted, Overlapped Commands Attempted */
const struct SCSISense sense_code_OVERLAPPED_COMMANDS = {
.key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00
};
/* Command aborted, LUN Communication Failure */
const struct SCSISense sense_code_LUN_COMM_FAILURE = {
.key = ABORTED_COMMAND, .asc = 0x08, .ascq = 0x00
};
/* Medium Error, Unrecovered read error */
const struct SCSISense sense_code_READ_ERROR = {
.key = MEDIUM_ERROR, .asc = 0x11, .ascq = 0x00
};
/* Not ready, Cause not reportable */
const struct SCSISense sense_code_NOT_READY = {
.key = NOT_READY, .asc = 0x04, .ascq = 0x00
};
/* Unit attention, Capacity data has changed */
const struct SCSISense sense_code_CAPACITY_CHANGED = {
.key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09
};
/* Unit attention, Power on, reset or bus device reset occurred */
const struct SCSISense sense_code_RESET = {
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00
};
/* Unit attention, SCSI bus reset */
const struct SCSISense sense_code_SCSI_BUS_RESET = {
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x02
};
/* Unit attention, No medium */
const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = {
.key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00
};
/* Unit attention, Medium may have changed */
const struct SCSISense sense_code_MEDIUM_CHANGED = {
.key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00
};
/* Unit attention, Reported LUNs data has changed */
const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = {
.key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e
};
/* Unit attention, Device internal reset */
const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
};
/* Data Protection, Write Protected */
const struct SCSISense sense_code_WRITE_PROTECTED = {
.key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00
};
/* Data Protection, Space Allocation Failed Write Protect */
const struct SCSISense sense_code_SPACE_ALLOC_FAILED = {
.key = DATA_PROTECT, .asc = 0x27, .ascq = 0x07
};
/*
* scsi_convert_sense
*
* Convert between fixed and descriptor sense buffers
*/
int scsi_convert_sense(uint8_t *in_buf, int in_len,
uint8_t *buf, int len, bool fixed)
{
SCSISense sense;
bool fixed_in;
if (in_len == 0) {
return scsi_build_sense_buf(buf, len, SENSE_CODE(NO_SENSE), fixed);
}
fixed_in = (in_buf[0] & 2) == 0;
if (fixed == fixed_in) {
memcpy(buf, in_buf, MIN(len, in_len));
return MIN(len, in_len);
} else {
sense = scsi_parse_sense_buf(in_buf, in_len);
return scsi_build_sense_buf(buf, len, sense, fixed);
}
}
static bool scsi_sense_is_guest_recoverable(int key, int asc, int ascq)
{
switch (key) {
case NO_SENSE:
case RECOVERED_ERROR:
case UNIT_ATTENTION:
case ABORTED_COMMAND:
return true;
case NOT_READY:
case ILLEGAL_REQUEST:
case DATA_PROTECT:
/* Parse ASCQ */
break;
default:
return false;
}
switch ((asc << 8) | ascq) {
case 0x1a00: /* PARAMETER LIST LENGTH ERROR */
case 0x2000: /* INVALID OPERATION CODE */
case 0x2400: /* INVALID FIELD IN CDB */
case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */
case 0x2600: /* INVALID FIELD IN PARAMETER LIST */
case 0x2104: /* UNALIGNED WRITE COMMAND */
case 0x2105: /* WRITE BOUNDARY VIOLATION */
case 0x2106: /* ATTEMPT TO READ INVALID DATA */
case 0x550e: /* INSUFFICIENT ZONE RESOURCES */
case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */
case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */
return true;
default:
return false;
}
}
int scsi_sense_to_errno(int key, int asc, int ascq)
{
switch (key) {
case NO_SENSE:
case RECOVERED_ERROR:
case UNIT_ATTENTION:
return EAGAIN;
case ABORTED_COMMAND: /* COMMAND ABORTED */
return ECANCELED;
case NOT_READY:
case ILLEGAL_REQUEST:
case DATA_PROTECT:
/* Parse ASCQ */
break;
default:
return EIO;
}
switch ((asc << 8) | ascq) {
case 0x1a00: /* PARAMETER LIST LENGTH ERROR */
case 0x2000: /* INVALID OPERATION CODE */
case 0x2400: /* INVALID FIELD IN CDB */
case 0x2600: /* INVALID FIELD IN PARAMETER LIST */
return EINVAL;
case 0x2100: /* LBA OUT OF RANGE */
case 0x2707: /* SPACE ALLOC FAILED */
return ENOSPC;
case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */
return ENOTSUP;
case 0x3a00: /* MEDIUM NOT PRESENT */
case 0x3a01: /* MEDIUM NOT PRESENT TRAY CLOSED */
case 0x3a02: /* MEDIUM NOT PRESENT TRAY OPEN */
return ENOMEDIUM;
case 0x2700: /* WRITE PROTECTED */
return EACCES;
case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */
return EINPROGRESS;
case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */
return ENOTCONN;
default:
return EIO;
}
}
int scsi_sense_buf_to_errno(const uint8_t *in_buf, size_t in_len)
{
SCSISense sense;
if (in_len < 1) {
return EIO;
}
sense = scsi_parse_sense_buf(in_buf, in_len);
return scsi_sense_to_errno(sense.key, sense.asc, sense.ascq);
}
bool scsi_sense_buf_is_guest_recoverable(const uint8_t *in_buf, size_t in_len)
{
SCSISense sense;
if (in_len < 1) {
return false;
}
sense = scsi_parse_sense_buf(in_buf, in_len);
return scsi_sense_is_guest_recoverable(sense.key, sense.asc, sense.ascq);
}
const char *scsi_command_name(uint8_t cmd)
{
static const char *names[] = {
[ TEST_UNIT_READY ] = "TEST_UNIT_READY",
[ REWIND ] = "REWIND",
[ REQUEST_SENSE ] = "REQUEST_SENSE",
[ FORMAT_UNIT ] = "FORMAT_UNIT",
[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
/* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
[ READ_6 ] = "READ_6",
[ WRITE_6 ] = "WRITE_6",
[ SET_CAPACITY ] = "SET_CAPACITY",
[ READ_REVERSE ] = "READ_REVERSE",
[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
[ SPACE ] = "SPACE",
[ INQUIRY ] = "INQUIRY",
[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
[ MAINTENANCE_IN ] = "MAINTENANCE_IN",
[ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
[ MODE_SELECT ] = "MODE_SELECT",
[ RESERVE ] = "RESERVE",
[ RELEASE ] = "RELEASE",
[ COPY ] = "COPY",
[ ERASE ] = "ERASE",
[ MODE_SENSE ] = "MODE_SENSE",
[ START_STOP ] = "START_STOP/LOAD_UNLOAD",
/* LOAD_UNLOAD and START_STOP use the same operation code */
[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
[ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
[ READ_10 ] = "READ_10",
[ WRITE_10 ] = "WRITE_10",
[ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT",
/* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
[ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
[ VERIFY_10 ] = "VERIFY_10",
[ SEARCH_HIGH ] = "SEARCH_HIGH",
[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
[ SEARCH_LOW ] = "SEARCH_LOW",
[ SET_LIMITS ] = "SET_LIMITS",
[ PRE_FETCH ] = "PRE_FETCH/READ_POSITION",
/* READ_POSITION and PRE_FETCH use the same operation code */
[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
/* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
[ COMPARE ] = "COMPARE",
[ COPY_VERIFY ] = "COPY_VERIFY",
[ WRITE_BUFFER ] = "WRITE_BUFFER",
[ READ_BUFFER ] = "READ_BUFFER",
[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
[ READ_LONG_10 ] = "READ_LONG_10",
[ WRITE_LONG_10 ] = "WRITE_LONG_10",
[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
[ WRITE_SAME_10 ] = "WRITE_SAME_10",
[ UNMAP ] = "UNMAP",
[ READ_TOC ] = "READ_TOC",
[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
[ SANITIZE ] = "SANITIZE",
[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
[ LOG_SELECT ] = "LOG_SELECT",
[ LOG_SENSE ] = "LOG_SENSE",
[ MODE_SELECT_10 ] = "MODE_SELECT_10",
[ RESERVE_10 ] = "RESERVE_10",
[ RELEASE_10 ] = "RELEASE_10",
[ MODE_SENSE_10 ] = "MODE_SENSE_10",
[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
[ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16",
[ EXTENDED_COPY ] = "EXTENDED_COPY",
[ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16",
[ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN",
[ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT",
[ READ_16 ] = "READ_16",
[ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE",
[ WRITE_16 ] = "WRITE_16",
[ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
[ VERIFY_16 ] = "VERIFY_16",
[ PRE_FETCH_16 ] = "PRE_FETCH_16",
[ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16",
/* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */
[ LOCATE_16 ] = "LOCATE_16",
[ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16",
/* ERASE_16 and WRITE_SAME_16 use the same operation code */
[ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16",
[ WRITE_LONG_16 ] = "WRITE_LONG_16",
[ REPORT_LUNS ] = "REPORT_LUNS",
[ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12",
[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
[ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM",
[ READ_12 ] = "READ_12",
[ WRITE_12 ] = "WRITE_12",
[ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE",
/* ERASE_12 and GET_PERFORMANCE use the same operation code */
[ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12",
[ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
[ VERIFY_12 ] = "VERIFY_12",
[ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
[ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
[ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
[ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
[ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING",
/* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */
[ READ_CD ] = "READ_CD",
[ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12",
[ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE",
[ RESERVE_TRACK ] = "RESERVE_TRACK",
[ SEND_CUE_SHEET ] = "SEND_CUE_SHEET",
[ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE",
[ SET_CD_SPEED ] = "SET_CD_SPEED",
[ SET_READ_AHEAD ] = "SET_READ_AHEAD",
[ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE",
[ MECHANISM_STATUS ] = "MECHANISM_STATUS",
[ GET_EVENT_STATUS_NOTIFICATION ] = "GET_EVENT_STATUS_NOTIFICATION",
[ READ_DISC_INFORMATION ] = "READ_DISC_INFORMATION",
};
if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) {
return "*UNKNOWN*";
}
return names[cmd];
}
int scsi_sense_from_errno(int errno_value, SCSISense *sense)
{
switch (errno_value) {
case 0:
return GOOD;
case EDOM:
return TASK_SET_FULL;
#ifdef CONFIG_LINUX
/* These errno mapping are specific to Linux. For more information:
* - scsi_decide_disposition in drivers/scsi/scsi_error.c
* - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c
* - blk_errors[] in block/blk-core.c
*/
case EBADE:
return RESERVATION_CONFLICT;
case ENODATA:
*sense = SENSE_CODE(READ_ERROR);
return CHECK_CONDITION;
case EREMOTEIO:
*sense = SENSE_CODE(LUN_COMM_FAILURE);
return CHECK_CONDITION;
#endif
case ENOMEDIUM:
*sense = SENSE_CODE(NO_MEDIUM);
return CHECK_CONDITION;
case ENOMEM:
*sense = SENSE_CODE(TARGET_FAILURE);
return CHECK_CONDITION;
case EINVAL:
*sense = SENSE_CODE(INVALID_FIELD);
return CHECK_CONDITION;
case ENOSPC:
*sense = SENSE_CODE(SPACE_ALLOC_FAILED);
return CHECK_CONDITION;
default:
*sense = SENSE_CODE(IO_ERROR);
return CHECK_CONDITION;
}
}
#ifdef CONFIG_LINUX
int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
SCSISense *sense)
{
if (errno_value != 0) {
return scsi_sense_from_errno(errno_value, sense);
} else {
if (io_hdr->host_status == SCSI_HOST_NO_LUN ||
io_hdr->host_status == SCSI_HOST_BUSY ||
io_hdr->host_status == SCSI_HOST_TIME_OUT ||
(io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT)) {
return BUSY;
} else if (io_hdr->host_status) {
*sense = SENSE_CODE(I_T_NEXUS_LOSS);
return CHECK_CONDITION;
} else if (io_hdr->status) {
return io_hdr->status;
} else if (io_hdr->driver_status & SG_ERR_DRIVER_SENSE) {
return CHECK_CONDITION;
} else {
return GOOD;
}
}
}
#endif
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