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



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 lsi com>
Reviewed-by: Vijay Chauhan <vijay chauhan lsi com>
Reviewed-by: Bob Stankey <Robert stankey 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;
 




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