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scsi: introduce sg_io_sense_from_errno

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Move more knowledge of SG_IO out of hw/scsi/scsi-generic.c, for
reusability.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-08-22 09:43:14 +02:00
parent a3760467c6
commit 1ead6b4e24
3 changed files with 46 additions and 34 deletions
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35
scsi/utils.c
View file

@ -501,3 +501,38 @@ const char *scsi_command_name(uint8_t cmd)
}
return names[cmd];
}
#ifdef CONFIG_LINUX
int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
SCSISense *sense)
{
if (errno_value != 0) {
switch (errno_value) {
case EDOM:
return TASK_SET_FULL;
case ENOMEM:
*sense = SENSE_CODE(TARGET_FAILURE);
return CHECK_CONDITION;
default:
*sense = SENSE_CODE(IO_ERROR);
return CHECK_CONDITION;
}
} else {
if (io_hdr->host_status == SG_ERR_DID_NO_CONNECT ||
io_hdr->host_status == SG_ERR_DID_BUS_BUSY ||
io_hdr->host_status == SG_ERR_DID_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