This patch detects different operating RDAC modes during the discovery. It also collects the information about
the preferred path.
Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
Reviewed-by: Yanling Qi <yanling.qi@xxxxxxx>
Reviewed-by: Sudhir Dachepalli <Sudhir.Dachepalli@xxxxxxx>
Reviewed-by: Somasundaram Krishnasamy <Somasundaram.Krishnasamy@xxxxxxx>
Reviewed-by: Bob Stankey <Robert.Stankey@xxxxxxx>
Reviewed-by: Vijay Chauhan <Vijay.Chauhan@xxxxxxx>
---
--- linux-2.6.38/drivers/scsi/device_handler/scsi_dh_rdac.c.orig 2011-03-17 16:51:40.000000000 -0500
+++ linux-2.6.38/drivers/scsi/device_handler/scsi_dh_rdac.c 2011-03-17 16:53:33.000000000 -0500
@@ -194,7 +194,6 @@ struct rdac_dh_data {
#define RDAC_LUN_UNOWNED 0
#define RDAC_LUN_OWNED 1
-#define RDAC_LUN_AVT 2
char lun_state;
#define RDAC_PREFERRED 0
@@ -473,25 +472,33 @@ static int check_ownership(struct scsi_d
int err;
struct c9_inquiry *inqp;
- h->lun_state = RDAC_LUN_UNOWNED;
h->state = RDAC_STATE_ACTIVE;
err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry), h);
if (err == SCSI_DH_OK) {
inqp = &h->inq.c9;
- if ((inqp->avte_cvp >> 7) == 0x1) {
- /* LUN in AVT mode */
- sdev_printk(KERN_NOTICE, sdev,
- "%s: AVT mode detected\n",
- RDAC_NAME);
- h->lun_state = RDAC_LUN_AVT;
- } else if ((inqp->avte_cvp & 0x1) != 0) {
- /* LUN was owned by the controller */
+ /* detect the operating mode */
+ if ((inqp->avte_cvp >> 5) & 0x1)
+ h->mode = RDAC_MODE_IOSHIP; /* LUN in IOSHIP mode */
+ else if (inqp->avte_cvp >> 7)
+ h->mode = RDAC_MODE_AVT; /* LUN in AVT mode */
+ else
+ h->mode = RDAC_MODE; /* LUN in RDAC mode */
+
+ /* Update ownership */
+ if (inqp->avte_cvp & 0x1)
h->lun_state = RDAC_LUN_OWNED;
+ else {
+ h->lun_state = RDAC_LUN_UNOWNED;
+ if (h->mode == RDAC_MODE)
+ h->state = RDAC_STATE_PASSIVE;
}
- }
- if (h->lun_state == RDAC_LUN_UNOWNED)
- h->state = RDAC_STATE_PASSIVE;
+ /* Update path prio*/
+ if (inqp->path_prio & 0x1)
+ h->preferred = RDAC_PREFERRED;
+ else
+ h->preferred = RDAC_NON_PREFERRED;
+ }
return err;
}
--
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