[dm-devel] [PATCH 4/4] add manual failover support for HP storage works

[Mike Christie <michaelc cs wisc edu>]

blk_sg_io_err.patch - discussed here 
http://marc.theaimsgroup.com/?l=linux-scsi&m=108617935710955&w=2
diff -arup linux-2.6.7-rc2/drivers/block/scsi_ioctl.c linux-2.6.7-rc2-work/drivers/block/scsi_ioctl.c
--- linux-2.6.7-rc2/drivers/block/scsi_ioctl.c	2004-05-29 23:26:48.000000000 -0700
+++ linux-2.6.7-rc2-work/drivers/block/scsi_ioctl.c	2004-06-02 04:32:27.000000000 -0700
@@ -185,11 +185,11 @@ static int sg_io(request_queue_t *q, str
 	blk_execute_rq(q, bd_disk, rq);
 
 	/* write to all output members */
-	hdr->status = rq->errors;	
-	hdr->masked_status = (hdr->status >> 1) & 0x1f;
-	hdr->msg_status = 0;
-	hdr->host_status = 0;
-	hdr->driver_status = 0;
+	hdr->status = 0xff & rq->errors;
+	hdr->masked_status = status_byte(rq->errors);
+	hdr->msg_status = msg_byte(rq->errors);
+	hdr->host_status = host_byte(rq->errors);
+	hdr->driver_status = driver_byte(rq->errors);
 	hdr->info = 0;
 	if (hdr->masked_status || hdr->host_status || hdr->driver_status)
 		hdr->info |= SG_INFO_CHECK;
diff -arup linux-2.6.7-rc2/drivers/scsi/scsi_lib.c linux-2.6.7-rc2-work/drivers/scsi/scsi_lib.c
--- linux-2.6.7-rc2/drivers/scsi/scsi_lib.c	2004-05-29 23:26:10.000000000 -0700
+++ linux-2.6.7-rc2-work/drivers/scsi/scsi_lib.c	2004-06-02 02:51:16.000000000 -0700
@@ -708,8 +708,7 @@ void scsi_io_completion(struct scsi_cmnd
 	}
 
 	if (blk_pc_request(req)) { /* SG_IO ioctl from block level */
-		req->errors = (driver_byte(result) & DRIVER_SENSE) ?
-			      (CHECK_CONDITION << 1) : (result & 0xff);
+		req->errors = result; 
 		if (result) {
 			clear_errors = 0;
 			if (cmd->sense_buffer[0] & 0x70) {