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scsi: introduce scsi_sense_from_errno()

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The new function is an extension of the switch statement in scsi-disk.c
which also includes the errno cases only found in sg_io_sense_from_errno.
This allows us to consolidate the errno handling.

Extracted from a patch by Hannes Reinecke <hare@suse.de>.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-02-24 16:30:09 +01:00
parent 424740def9
commit d7a84021db
3 changed files with 51 additions and 47 deletions
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51
scsi/utils.c
View file

@ -565,21 +565,52 @@ const char *scsi_command_name(uint8_t cmd)
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) {
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;
}
return scsi_sense_from_errno(errno_value, sense);
} else {
if (io_hdr->host_status == SG_ERR_DID_NO_CONNECT ||
io_hdr->host_status == SG_ERR_DID_BUS_BUSY ||