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[SCSI] scsi_error: classify some ILLEGAL_REQUEST sense as a permanent TARGET_ERROR 

Permanent target failures are non-retryable and should be classified as
TARGET_ERROR; otherwise dm-multipath will retry an IO request that will
always fail at the target.

A SCSI command that fails with ILLEGAL_REQUEST sense and Additional
sense 0x20, 0x21, 0x24 or 0x26 represents a permanent TARGET_ERROR.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Mike Snitzer 2012-02-13 18:35:11 -05:00 committed by James Bottomley
parent 89730393f2
commit 47ac56db13
1 changed files with 8 additions and 0 deletions
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8
drivers/scsi/scsi_error.c
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@ -366,6 +366,14 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
return TARGET_ERROR;
case ILLEGAL_REQUEST:
if (sshdr.asc == 0x20 || /* Invalid command operation code */
sshdr.asc == 0x21 || /* Logical block address out of range */
sshdr.asc == 0x24 || /* Invalid field in cdb */
sshdr.asc == 0x26) { /* Parameter value invalid */
return TARGET_ERROR;
}
return SUCCESS;
default:
return SUCCESS;
}