static int lanai_proc_read()

in lanai.c [2442:2533]

• 90 lines of code
• 27 McCabe index (conditional complexity)

static int lanai_proc_read(struct atm_dev *atmdev, loff_t *pos, char *page)
{
	struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data;
	loff_t left = *pos;
	struct lanai_vcc *lvcc;
	if (left-- == 0)
		return sprintf(page, DEV_LABEL "(itf %d): chip=LANAI%s, "
		    "serial=%u, magic=0x%08X, num_vci=%d\n",
		    atmdev->number, lanai->type==lanai2 ? "2" : "HB",
		    (unsigned int) lanai->serialno,
		    (unsigned int) lanai->magicno, lanai->num_vci);
	if (left-- == 0)
		return sprintf(page, "revision: board=%d, pci_if=%d\n",
		    lanai->board_rev, (int) lanai->pci->revision);
	if (left-- == 0)
		return sprintf(page, "EEPROM ESI: %pM\n",
		    &lanai->eeprom[EEPROM_MAC]);
	if (left-- == 0)
		return sprintf(page, "status: SOOL=%d, LOCD=%d, LED=%d, "
		    "GPIN=%d\n", (lanai->status & STATUS_SOOL) ? 1 : 0,
		    (lanai->status & STATUS_LOCD) ? 1 : 0,
		    (lanai->status & STATUS_LED) ? 1 : 0,
		    (lanai->status & STATUS_GPIN) ? 1 : 0);
	if (left-- == 0)
		return sprintf(page, "global buffer sizes: service=%zu, "
		    "aal0_rx=%zu\n", lanai_buf_size(&lanai->service),
		    lanai->naal0 ? lanai_buf_size(&lanai->aal0buf) : 0);
	if (left-- == 0) {
		get_statistics(lanai);
		return sprintf(page, "cells in error: overflow=%u, "
		    "closed_vci=%u, bad_HEC=%u, rx_fifo=%u\n",
		    lanai->stats.ovfl_trash, lanai->stats.vci_trash,
		    lanai->stats.hec_err, lanai->stats.atm_ovfl);
	}
	if (left-- == 0)
		return sprintf(page, "PCI errors: parity_detect=%u, "
		    "master_abort=%u, master_target_abort=%u,\n",
		    lanai->stats.pcierr_parity_detect,
		    lanai->stats.pcierr_serr_set,
		    lanai->stats.pcierr_m_target_abort);
	if (left-- == 0)
		return sprintf(page, "            slave_target_abort=%u, "
		    "master_parity=%u\n", lanai->stats.pcierr_s_target_abort,
		    lanai->stats.pcierr_master_parity);
	if (left-- == 0)
		return sprintf(page, "                     no_tx=%u, "
		    "no_rx=%u, bad_rx_aal=%u\n", lanai->stats.service_norx,
		    lanai->stats.service_notx,
		    lanai->stats.service_rxnotaal5);
	if (left-- == 0)
		return sprintf(page, "resets: dma=%u, card=%u\n",
		    lanai->stats.dma_reenable, lanai->stats.card_reset);
	/* At this point, "left" should be the VCI we're looking for */
	read_lock(&vcc_sklist_lock);
	for (; ; left++) {
		if (left >= NUM_VCI) {
			left = 0;
			goto out;
		}
		if ((lvcc = lanai->vccs[left]) != NULL)
			break;
		(*pos)++;
	}
	/* Note that we re-use "left" here since we're done with it */
	left = sprintf(page, "VCI %4d: nref=%d, rx_nomem=%u",  (vci_t) left,
	    lvcc->nref, lvcc->stats.rx_nomem);
	if (lvcc->rx.atmvcc != NULL) {
		left += sprintf(&page[left], ",\n          rx_AAL=%d",
		    lvcc->rx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0);
		if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5)
			left += sprintf(&page[left], ", rx_buf_size=%zu, "
			    "rx_bad_len=%u,\n          rx_service_trash=%u, "
			    "rx_service_stream=%u, rx_bad_crc=%u",
			    lanai_buf_size(&lvcc->rx.buf),
			    lvcc->stats.x.aal5.rx_badlen,
			    lvcc->stats.x.aal5.service_trash,
			    lvcc->stats.x.aal5.service_stream,
			    lvcc->stats.x.aal5.service_rxcrc);
	}
	if (lvcc->tx.atmvcc != NULL)
		left += sprintf(&page[left], ",\n          tx_AAL=%d, "
		    "tx_buf_size=%zu, tx_qos=%cBR, tx_backlogged=%c",
		    lvcc->tx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0,
		    lanai_buf_size(&lvcc->tx.buf),
		    lvcc->tx.atmvcc == lanai->cbrvcc ? 'C' : 'U',
		    vcc_is_backlogged(lvcc) ? 'Y' : 'N');
	page[left++] = '\n';
	page[left] = '\0';
    out:
	read_unlock(&vcc_sklist_lock);
	return left;
}