static void dasd_eckd_dump_sense_tcw()

in block/dasd_eckd.c [5609:5737]

• 120 lines of code
• 16 McCabe index (conditional complexity)

static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
				 struct dasd_ccw_req *req, struct irb *irb)
{
	char *page;
	int len, sl, sct, residual;
	struct tsb *tsb;
	u8 *sense, *rcq;

	page = (char *) get_zeroed_page(GFP_ATOMIC);
	if (page == NULL) {
		DBF_DEV_EVENT(DBF_WARNING, device, " %s",
			    "No memory to dump sense data");
		return;
	}
	/* dump the sense data */
	len = sprintf(page, PRINTK_HEADER
		      " I/O status report for device %s:\n",
		      dev_name(&device->cdev->dev));
	len += sprintf(page + len, PRINTK_HEADER
		       " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
		       "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
		       req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
		       scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
		       scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
		       irb->scsw.tm.fcxs,
		       (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
		       req ? req->intrc : 0);
	len += sprintf(page + len, PRINTK_HEADER
		       " device %s: Failing TCW: %p\n",
		       dev_name(&device->cdev->dev),
		       (void *) (addr_t) irb->scsw.tm.tcw);

	tsb = NULL;
	sense = NULL;
	if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
		tsb = tcw_get_tsb(
			(struct tcw *)(unsigned long)irb->scsw.tm.tcw);

	if (tsb) {
		len += sprintf(page + len, PRINTK_HEADER
			       " tsb->length %d\n", tsb->length);
		len += sprintf(page + len, PRINTK_HEADER
			       " tsb->flags %x\n", tsb->flags);
		len += sprintf(page + len, PRINTK_HEADER
			       " tsb->dcw_offset %d\n", tsb->dcw_offset);
		len += sprintf(page + len, PRINTK_HEADER
			       " tsb->count %d\n", tsb->count);
		residual = tsb->count - 28;
		len += sprintf(page + len, PRINTK_HEADER
			       " residual %d\n", residual);

		switch (tsb->flags & 0x07) {
		case 1:	/* tsa_iostat */
			len += sprintf(page + len, PRINTK_HEADER
			       " tsb->tsa.iostat.dev_time %d\n",
				       tsb->tsa.iostat.dev_time);
			len += sprintf(page + len, PRINTK_HEADER
			       " tsb->tsa.iostat.def_time %d\n",
				       tsb->tsa.iostat.def_time);
			len += sprintf(page + len, PRINTK_HEADER
			       " tsb->tsa.iostat.queue_time %d\n",
				       tsb->tsa.iostat.queue_time);
			len += sprintf(page + len, PRINTK_HEADER
			       " tsb->tsa.iostat.dev_busy_time %d\n",
				       tsb->tsa.iostat.dev_busy_time);
			len += sprintf(page + len, PRINTK_HEADER
			       " tsb->tsa.iostat.dev_act_time %d\n",
				       tsb->tsa.iostat.dev_act_time);
			sense = tsb->tsa.iostat.sense;
			break;
		case 2: /* ts_ddpc */
			len += sprintf(page + len, PRINTK_HEADER
			       " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
			for (sl = 0; sl < 2; sl++) {
				len += sprintf(page + len, PRINTK_HEADER
					       " tsb->tsa.ddpc.rcq %2d-%2d: ",
					       (8 * sl), ((8 * sl) + 7));
				rcq = tsb->tsa.ddpc.rcq;
				for (sct = 0; sct < 8; sct++) {
					len += sprintf(page + len, " %02x",
						       rcq[8 * sl + sct]);
				}
				len += sprintf(page + len, "\n");
			}
			sense = tsb->tsa.ddpc.sense;
			break;
		case 3: /* tsa_intrg */
			len += sprintf(page + len, PRINTK_HEADER
				      " tsb->tsa.intrg.: not supported yet\n");
			break;
		}

		if (sense) {
			for (sl = 0; sl < 4; sl++) {
				len += sprintf(page + len, PRINTK_HEADER
					       " Sense(hex) %2d-%2d:",
					       (8 * sl), ((8 * sl) + 7));
				for (sct = 0; sct < 8; sct++) {
					len += sprintf(page + len, " %02x",
						       sense[8 * sl + sct]);
				}
				len += sprintf(page + len, "\n");
			}

			if (sense[27] & DASD_SENSE_BIT_0) {
				/* 24 Byte Sense Data */
				sprintf(page + len, PRINTK_HEADER
					" 24 Byte: %x MSG %x, "
					"%s MSGb to SYSOP\n",
					sense[7] >> 4, sense[7] & 0x0f,
					sense[1] & 0x10 ? "" : "no");
			} else {
				/* 32 Byte Sense Data */
				sprintf(page + len, PRINTK_HEADER
					" 32 Byte: Format: %x "
					"Exception class %x\n",
					sense[6] & 0x0f, sense[22] >> 4);
			}
		} else {
			sprintf(page + len, PRINTK_HEADER
				" SORRY - NO VALID SENSE AVAILABLE\n");
		}
	} else {
		sprintf(page + len, PRINTK_HEADER
			" SORRY - NO TSB DATA AVAILABLE\n");
	}
	printk(KERN_ERR "%s", page);
	free_page((unsigned long) page);
}