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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 06-05-2008, 01:41 AM
 
Default lpfc: start to use new trasnport errors.

From: Mike Christie <michaelc@cs.wisc.edu>

This is only a test patch to get lpfc going. For the case I changed
it looked like the rport is deleted then we fail these IOs with
DID_BUS_BUSY so using DID_TRANSPORT_DISRUPTED was correct. In testing
the driver by stopping the fcp service on the target this worked.

I was not sure if maybe this bus busy:
case IOSTAT_NPORT_BSY:
case IOSTAT_FABRIC_BSY:
cmd->result = ScsiResult(DID_BUS_BUSY, 0);
should also be converted. For qla2xxx I thought we blocked the
rport for similar errors (at least the names sounded similar ) and so I
used DID_TRANSPORT_DISRUPTED, but for lpfc I could not
hit this code and was not sure by just looking at it if it was exactly
the same, so I did not touch it in this patch.

I was also not sure about some cases where if I just unplugged a cable.
I would sometimes get IOSTAT_LOCAL_REJECT with IOERR_DEFAULT, so it seemed
like DID_ERROR was right for that, but I had seen that there is also
a IOERR_LINK_DOWN value. Maybe for that if we end up deleting the rport
we should be returning DID_TRANSPORT_DISRUPTED, but I was not able to
hit that case and was not able to tell from the code when I should, so
I did not touch it.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
---
drivers/scsi/lpfc/lpfc_scsi.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 0910a9a..83f7e43 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -590,7 +590,14 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,

if (!pnode || !NLP_CHK_NODE_ACT(pnode)
|| (pnode->nlp_state != NLP_STE_MAPPED_NODE))
- cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
+ /*
+ * Port is not setup so fail IO with
+ * DID_TRANSPORT_DISRUPTED, and allow the fc
+ * class to determine what to do with it when
+ * its timers fire.
+ */
+ cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
+ SAM_STAT_BUSY);
} else {
cmd->result = ScsiResult(DID_OK, 0);
}
--
1.5.4.1

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