Thanks for the review comments. I incorporated the comments, below is the updated patch:
If an I/O times out and an abort issued by host, if the abort is
successful we need to set scsi status as DID_ABORT. Or else the
mid-layer error handler which looks for this error code, will
offline the device. Also if the original I/O is not found in fnic
firmware, we will consider the abort as successful.
The start_time assignment is moved because of the new goto.
Fnic driver version changed from 1.6.0.17a to 1.6.0.19,
version 1.6.0.18 has been skipped
Signed-off-by: Satish Kharat <satishkh@xxxxxxxxx>
---
drivers/scsi/fnic/fnic.h | 2 +-
drivers/scsi/fnic/fnic_scsi.c | 35 +++++++++++++++++++++++++++++------
2 files changed, 30 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
index ce129e5..52a53f8 100644
--- a/drivers/scsi/fnic/fnic.h
+++ b/drivers/scsi/fnic/fnic.h
@@ -39,7 +39,7 @@
#define DRV_NAME "fnic"
#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
-#define DRV_VERSION "1.6.0.17a"
+#define DRV_VERSION "1.6.0.19"
#define PFX DRV_NAME ": "
#define DFX DRV_NAME "%d: "
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 266b909..b732fa3 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -1092,6 +1092,11 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
atomic64_inc(
&term_stats->terminate_fw_timeouts);
break;
+ case FCPIO_ITMF_REJECTED:
+ FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+ "abort reject recd. id %d\n",
+ (int)(id & FNIC_TAG_MASK));
+ break;
case FCPIO_IO_NOT_FOUND:
if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
atomic64_inc(&abts_stats->abort_io_not_found);
@@ -1112,9 +1117,15 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
spin_unlock_irqrestore(io_lock, flags);
return;
}
- CMD_ABTS_STATUS(sc) = hdr_status;
+
CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
+ /* If the status is IO not found consider it as success */
+ if (hdr_status == FCPIO_IO_NOT_FOUND)
+ CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
+ else
+ CMD_ABTS_STATUS(sc) = hdr_status;
+
atomic64_dec(&fnic_stats->io_stats.active_ios);
if (atomic64_read(&fnic->io_cmpl_skip))
atomic64_dec(&fnic->io_cmpl_skip);
@@ -1927,21 +1938,33 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
+ start_time = io_req->start_time;
/*
* firmware completed the abort, check the status,
- * free the io_req irrespective of failure or success
+ * free the io_req if successful. If abort fails,
+ * Device reset will clean the I/O.
*/
- if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
+ if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) {
+ CMD_SP(sc) = NULL;
+ }
+ else
+ {
ret = FAILED;
-
- CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_abort_cmd_end;
+ }
spin_unlock_irqrestore(io_lock, flags);
- start_time = io_req->start_time;
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
+ if (sc->scsi_done) {
+ /* Call SCSI completion function to complete the IO */
+ sc->result = (DID_ABORT << 16);
+ sc->scsi_done(sc);
+ }
+
fnic_abort_cmd_end:
FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
sc->request->tag, sc,
--
2.4.3
________________________________________
From: Ewan Milne <emilne@xxxxxxxxxx>
Sent: Monday, March 14, 2016 12:59 PM
To: Satish Kharat (satishkh)
Cc: linux-scsi@xxxxxxxxxxxxxxx
Subject: Re: [PATCH 1/5] Fix to cleanup aborted IO to avoid device being offlined by mid-layer
On Mon, 2016-03-14 at 11:14 -0700, Satish Kharat wrote:
> If an I/O times out and an abort issued by host, if the abort is
> successful we need to set scsi status as DID_ABORT. Or else the
> mid-layer error handler which looks for this error code, will
> offline the device. Also if the original I/O is not found in fnic
> firmware, we will consider the abort as successful.
> Fnic driver version changed from 1.6.0.17a to 1.6.0.19,
> version 1.6.0.18 has been skipped
>
> Signed-off-by: Satish Kharat <satishkh@xxxxxxxxx>
> ---
> drivers/scsi/fnic/fnic.h | 2 +-
> drivers/scsi/fnic/fnic_scsi.c | 32 +++++++++++++++++++++++++++-----
> 2 files changed, 28 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
> index ce129e5..52a53f8 100644
> --- a/drivers/scsi/fnic/fnic.h
> +++ b/drivers/scsi/fnic/fnic.h
> @@ -39,7 +39,7 @@
>
> #define DRV_NAME "fnic"
> #define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
> -#define DRV_VERSION "1.6.0.17a"
> +#define DRV_VERSION "1.6.0.19"
> #define PFX DRV_NAME ": "
> #define DFX DRV_NAME "%d: "
>
> diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
> index 266b909..b9732b1 100644
> --- a/drivers/scsi/fnic/fnic_scsi.c
> +++ b/drivers/scsi/fnic/fnic_scsi.c
> @@ -1092,6 +1092,11 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
> atomic64_inc(
> &term_stats->terminate_fw_timeouts);
> break;
> + case FCPIO_ITMF_REJECTED:
> + FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
> + "abort reject recd. id %d\n",
> + (int)(id & FNIC_TAG_MASK));
> + break;
> case FCPIO_IO_NOT_FOUND:
> if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
> atomic64_inc(&abts_stats->abort_io_not_found);
> @@ -1112,9 +1117,14 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
> spin_unlock_irqrestore(io_lock, flags);
> return;
> }
> +
> CMD_ABTS_STATUS(sc) = hdr_status;
> CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
>
> + /* If the status is IO not found consider it as success */
> + if (hdr_status == FCPIO_IO_NOT_FOUND)
> + CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
> +
Minor nitpick: I would have done:
if (hdr_status == FCP_IO_NOT_FOUND)
CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS;
else
CMD_ABTS_STATUS(sc) = hdr_status;
rather than overwriting the assignment made several lines above, it is
more explicit and less prone to errors if the code is later changed.
> atomic64_dec(&fnic_stats->io_stats.active_ios);
> if (atomic64_read(&fnic->io_cmpl_skip))
> atomic64_dec(&fnic->io_cmpl_skip);
> @@ -1927,21 +1937,33 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
>
> CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
>
> + start_time = io_req->start_time;
> /*
> * firmware completed the abort, check the status,
> - * free the io_req irrespective of failure or success
> + * free the io_req if successful. If abort fails,
> + * Device reset will clean the I/O.
> */
> - if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
> + if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) {
> + CMD_SP(sc) = NULL;
> + }
> + else
> + {
> ret = FAILED;
> -
> - CMD_SP(sc) = NULL;
> + spin_unlock_irqrestore(io_lock, flags);
> + goto fnic_abort_cmd_end;
> + }
>
> spin_unlock_irqrestore(io_lock, flags);
>
> - start_time = io_req->start_time;
What was the point of moving the assignment of start_time?
Other places in the code still set it just before the call to
fnic_release_ioreq_buf().
> fnic_release_ioreq_buf(fnic, io_req, sc);
> mempool_free(io_req, fnic->io_req_pool);
>
> + if (sc->scsi_done) {
> + /* Call SCSI completion function to complete the IO */
> + sc->result = (DID_ABORT << 16);
> + sc->scsi_done(sc);
> + }
> +
> fnic_abort_cmd_end:
> FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
> sc->request->tag, sc,
Despite the above comments, I guess this looks OK.
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
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