[dm-devel] [PATCH 1/3][RESUBMIT] scsi_dh_rdac: changes to collect the rdac debug information during the initialization

[Moger, Babu]

Adding the code to read the debug information during initialization. This patch collects the information about storage and controllers during rdac_activate.

Signed-off-by: Babu Moger <babu.moger at lsi.com>
Reviewed-by: Vijay Chauhan <vijay.chauhan at lsi.com>
Reviewed-by: Bob Stankey <Robert.stankey at lsi.com>

---

--- linux-2.6.31-rc5/drivers/scsi/device_handler/scsi_dh_rdac.c.orig	2009-09-02 09:49:23.000000000 -0500
+++ linux-2.6.31-rc5/drivers/scsi/device_handler/scsi_dh_rdac.c	2009-09-02 10:04:40.000000000 -0500
@@ -112,6 +112,7 @@ struct c9_inquiry {
 
 #define SUBSYS_ID_LEN	16
 #define SLOT_ID_LEN	2
+#define ARRAY_LABEL_LEN	31
 
 struct c4_inquiry {
 	u8	peripheral_info;
@@ -135,6 +136,8 @@ struct rdac_controller {
 		struct rdac_pg_legacy legacy;
 		struct rdac_pg_expanded expanded;
 	} mode_select;
+	u8	index;
+	u8	array_name[ARRAY_LABEL_LEN];
 };
 struct c8_inquiry {
 	u8	peripheral_info;
@@ -303,7 +306,8 @@ static void release_controller(struct kr
 	kfree(ctlr);
 }
 
-static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
+static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id,
+						char *array_name)
 {
 	struct rdac_controller *ctlr, *tmp;
 
@@ -324,6 +328,14 @@ static struct rdac_controller *get_contr
 	/* initialize fields of controller */
 	memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN);
 	memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN);
+	memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN);
+
+	/* update the controller index */
+	if (slot_id[1] == 0x31)
+		ctlr->index = 0;
+	else
+		ctlr->index = 1;
+
 	kref_init(&ctlr->kref);
 	ctlr->use_ms10 = -1;
 	list_add(&ctlr->node, &ctlr_list);
@@ -363,9 +375,10 @@ done:
 	return err;
 }
 
-static int get_lun(struct scsi_device *sdev, struct rdac_dh_data *h)
+static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h,
+			char *array_name)
 {
-	int err;
+	int err, i;
 	struct c8_inquiry *inqp;
 
 	err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry), h);
@@ -377,6 +390,11 @@ static int get_lun(struct scsi_device *s
 		    inqp->page_id[2] != 'i' || inqp->page_id[3] != 'd')
 			return SCSI_DH_NOSYS;
 		h->lun = inqp->lun[7]; /* Uses only the last byte */
+
+		for(i=0; i<ARRAY_LABEL_LEN-1; ++i)
+			*(array_name+i) = inqp->array_user_label[(2*i)+1];
+
+		*(array_name+ARRAY_LABEL_LEN-1) = '\0';
 	}
 	return err;
 }
@@ -410,7 +428,7 @@ static int check_ownership(struct scsi_d
 }
 
 static int initialize_controller(struct scsi_device *sdev,
-				 struct rdac_dh_data *h)
+				 struct rdac_dh_data *h, char *array_name)
 {
 	int err;
 	struct c4_inquiry *inqp;
@@ -418,7 +436,8 @@ static int initialize_controller(struct 
 	err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry), h);
 	if (err == SCSI_DH_OK) {
 		inqp = &h->inq.c4;
-		h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id);
+		h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id,
+					array_name);
 		if (!h->ctlr)
 			err = SCSI_DH_RES_TEMP_UNAVAIL;
 	}
@@ -520,13 +539,14 @@ static int rdac_activate(struct scsi_dev
 {
 	struct rdac_dh_data *h = get_rdac_data(sdev);
 	int err = SCSI_DH_OK;
+	char array_name[ARRAY_LABEL_LEN];
 
 	err = check_ownership(sdev, h);
 	if (err != SCSI_DH_OK)
 		goto done;
 
 	if (!h->ctlr) {
-		err = initialize_controller(sdev, h);
+		err = initialize_controller(sdev, h, array_name);
 		if (err != SCSI_DH_OK)
 			goto done;
 	}
@@ -656,6 +676,7 @@ static int rdac_bus_attach(struct scsi_d
 	struct rdac_dh_data *h;
 	unsigned long flags;
 	int err;
+	char array_name[ARRAY_LABEL_LEN];
 
 	scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
 			       + sizeof(*h) , GFP_KERNEL);
@@ -670,7 +691,7 @@ static int rdac_bus_attach(struct scsi_d
 	h->lun = UNINITIALIZED_LUN;
 	h->state = RDAC_STATE_ACTIVE;
 
-	err = get_lun(sdev, h);
+	err = get_lun_info(sdev, h, array_name);
 	if (err != SCSI_DH_OK)
 		goto failed;