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scsi: Refactor scsi sense interpreting code

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So that it can be reused outside of iscsi.c.

Also update MAINTAINERS to include the new files in SCSI section.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170821141008.19383-2-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Fam Zheng 2017-08-21 22:10:05 +08:00 committed by Paolo Bonzini
parent b07fbce634
commit 2875135807
5 changed files with 78 additions and 41 deletions
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2
MAINTAINERS
View file

@ -968,7 +968,9 @@ SCSI
M: Paolo Bonzini <pbonzini@redhat.com>
S: Supported
F: include/hw/scsi/*
F: include/scsi/*
F: hw/scsi/*
F: util/scsi*
F: tests/virtio-scsi-test.c
T: git git://github.com/bonzini/qemu.git scsi-next

45
block/iscsi.c
View file

@ -40,6 +40,7 @@
#include "qmp-commands.h"
#include "qapi/qmp/qstring.h"
#include "crypto/secret.h"
#include "scsi/scsi.h"
#include <iscsi/iscsi.h>
#include <iscsi/scsi-lowlevel.h>
@ -209,47 +210,9 @@ static inline unsigned exp_random(double mean)
static int iscsi_translate_sense(struct scsi_sense *sense)
{
int ret;
switch (sense->key) {
case SCSI_SENSE_NOT_READY:
return -EBUSY;
case SCSI_SENSE_DATA_PROTECTION:
return -EACCES;
case SCSI_SENSE_COMMAND_ABORTED:
return -ECANCELED;
case SCSI_SENSE_ILLEGAL_REQUEST:
/* Parse ASCQ */
break;
default:
return -EIO;
}
switch (sense->ascq) {
case SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR:
case SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE:
case SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB:
case SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST:
ret = -EINVAL;
break;
case SCSI_SENSE_ASCQ_LBA_OUT_OF_RANGE:
ret = -ENOSPC;
break;
case SCSI_SENSE_ASCQ_LOGICAL_UNIT_NOT_SUPPORTED:
ret = -ENOTSUP;
break;
case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT:
case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT_TRAY_CLOSED:
case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT_TRAY_OPEN:
ret = -ENOMEDIUM;
break;
case SCSI_SENSE_ASCQ_WRITE_PROTECTED:
ret = -EACCES;
break;
default:
ret = -EIO;
break;
}
return ret;
return - scsi_sense_to_errno(sense->key,
(sense->ascq & 0xFF00) >> 8,
sense->ascq & 0xFF);
}
/* Called (via iscsi_service) with QemuMutex held. */

19
include/scsi/scsi.h Normal file
View file

@ -0,0 +1,19 @@
/*
* SCSI helpers
*
* Copyright 2017 Red Hat, Inc.
*
* Authors:
* Fam Zheng <famz@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.
*/
#ifndef QEMU_SCSI_H
#define QEMU_SCSI_H
int scsi_sense_to_errno(int key, int asc, int ascq);
#endif

1
util/Makefile.objs
View file

@ -45,3 +45,4 @@ util-obj-y += qht.o
util-obj-y += range.o
util-obj-y += stats64.o
util-obj-y += systemd.o
util-obj-y += scsi.o

52
util/scsi.c Normal file
View file

@ -0,0 +1,52 @@
/*
* SCSI helpers
*
* Copyright 2017 Red Hat, Inc.
*
* Authors:
* Fam Zheng <famz@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/scsi.h"
int scsi_sense_to_errno(int key, int asc, int ascq)
{
switch (key) {
case 0x02: /* NOT READY */
return EBUSY;
case 0x07: /* DATA PROTECTION */
return EACCES;
case 0x0b: /* COMMAND ABORTED */
return ECANCELED;
case 0x05: /* ILLEGAL REQUEST */
/* 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 */
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;
default:
return EIO;
}
}