Hi Chandra,
Chandra Seetharaman wrote:
On Wed, 2008-05-14 at 16:43 +0200, Hannes Reinecke wrote:
This patch updates the RDAC device handler to
refuse to attach to devices not supporting the
RDAC vpd pages.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/device_handler/scsi_dh_rdac.c | 84 +++++++++++++++++----------
1 files changed, 53 insertions(+), 31 deletions(-)
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index e61cde6..dd9f515 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
[ .. ]
/*
* If in AVT mode or if the path already owns the LUN,
* return RDAC_OWNED;
*/
With the code change below the comment above is incorrect, please
remove.
OK.
@@ -478,24 +491,9 @@ static int rdac_activate(struct scsi_device *sdev)
struct rdac_dh_data *h = get_rdac_data(sdev);
int err = SCSI_DH_OK;
- if (h->lun == UNINITIALIZED_LUN) {
- err = get_lun(sdev);
- if (err != SCSI_DH_OK)
- goto done;
- }
-
err = check_ownership(sdev);
- switch (err) {
- case RDAC_UNOWNED:
- break;
- case RDAC_OWNED:
- err = SCSI_DH_OK;
- goto done;
- case RDAC_FAILED:
- default:
- err = SCSI_DH_IO;
What does this change yield ? (under check_ownership)
We're now setting the lun state explicitly, so there's
no need to return different error codes.
+ if (err != SCSI_DH_OK)
goto done;
- }
if (!h->ctlr) {
err = initialize_controller(sdev);
@@ -508,8 +506,9 @@ static int rdac_activate(struct scsi_device *sdev)
if (err != SCSI_DH_OK)
goto done;
}
-
- err = send_mode_select(sdev);
+ if (h->lun_state != RDAC_LUN_AVT &&
+ !(h->lun_state & RDAC_LUN_OWNED))
This can be simplified by (h->lun_state == RDAC_LUN_UNOWNED) ?
Indeed,
+ err = send_mode_select(sdev);
done:
return err;
}
@@ -606,6 +605,7 @@ static int rdac_bus_attach(struct scsi_device *sdev)
struct scsi_dh_data *scsi_dh_data;
struct rdac_dh_data *h;
unsigned long flags;
+ int err;
scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
+ sizeof(*h) , GFP_KERNEL);
@@ -622,11 +622,33 @@ static int rdac_bus_attach(struct scsi_device *sdev)
spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
sdev->scsi_dh_data = scsi_dh_data;
spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
need an initialization for lun_state.
No. lun_state is initialized to '0', ie RDAC_LUN_UNOWNED.
I don't think we need a separate 'uninitialized' state here.
+
+ err = get_lun(sdev);
+ if (err != SCSI_DH_OK)
+ goto failed;
+
+ err = check_ownership(sdev);
+ if (err != SCSI_DH_OK)
+ goto failed;
+
+ sdev_printk(KERN_NOTICE, sdev,
+ "%s: LUN %d (state %d)\n",
+ RDAC_NAME, h->lun, h->lun_state);
instead of printing lun_state as %d it would be more readable it is a
string.
Ok.
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@xxxxxxx +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
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