static int eni_proc_read()

in eni.c [2081:2198]

• 113 lines of code
• 23 McCabe index (conditional complexity)

static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
{
	struct sock *s;
	static const char *signal[] = { "LOST","unknown","okay" };
	struct eni_dev *eni_dev = ENI_DEV(dev);
	struct atm_vcc *vcc;
	int left,i;

	left = *pos;
	if (!left)
		return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
		    "%d cps remaining\n",dev->number,signal[(int) dev->signal],
		    eni_dev->mem >> 10,eni_dev->tx_bw);
	if (!--left)
		return sprintf(page,"%4sBursts: TX"
#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
    !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
    !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
    !defined(CONFIG_ATM_ENI_BURST_TX_2W)
		    " none"
#endif
#ifdef CONFIG_ATM_ENI_BURST_TX_16W
		    " 16W"
#endif
#ifdef CONFIG_ATM_ENI_BURST_TX_8W
		    " 8W"
#endif
#ifdef CONFIG_ATM_ENI_BURST_TX_4W
		    " 4W"
#endif
#ifdef CONFIG_ATM_ENI_BURST_TX_2W
		    " 2W"
#endif
		    ", RX"
#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
    !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
    !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
    !defined(CONFIG_ATM_ENI_BURST_RX_2W)
		    " none"
#endif
#ifdef CONFIG_ATM_ENI_BURST_RX_16W
		    " 16W"
#endif
#ifdef CONFIG_ATM_ENI_BURST_RX_8W
		    " 8W"
#endif
#ifdef CONFIG_ATM_ENI_BURST_RX_4W
		    " 4W"
#endif
#ifdef CONFIG_ATM_ENI_BURST_RX_2W
		    " 2W"
#endif
#ifndef CONFIG_ATM_ENI_TUNE_BURST
		    " (default)"
#endif
		    "\n","");
	if (!--left) 
		return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
		    "",eni_dev->tx_mult,eni_dev->rx_mult);
	for (i = 0; i < NR_CHAN; i++) {
		struct eni_tx *tx = eni_dev->tx+i;

		if (!tx->send) continue;
		if (!--left) {
			return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
			    "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
			    (unsigned long) (tx->send - eni_dev->ram),
			    tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
			    tx->reserved,tx->shaping,
			    tx == eni_dev->ubr ? " (UBR)" : "");
		}
		if (--left) continue;
		return sprintf(page,"%10sbacklog %u packets\n","",
		    skb_queue_len(&tx->backlog));
	}
	read_lock(&vcc_sklist_lock);
	for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
		struct hlist_head *head = &vcc_hash[i];

		sk_for_each(s, head) {
			struct eni_vcc *eni_vcc;
			int length;

			vcc = atm_sk(s);
			if (vcc->dev != dev)
				continue;
			eni_vcc = ENI_VCC(vcc);
			if (--left) continue;
			length = sprintf(page,"vcc %4d: ",vcc->vci);
			if (eni_vcc->rx) {
				length += sprintf(page+length, "0x%lx-0x%lx "
				    "(%6ld bytes)",
				    (unsigned long) (eni_vcc->recv - eni_dev->ram),
				    eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
				    eni_vcc->words*4);
				if (eni_vcc->tx) length += sprintf(page+length,", ");
			}
			if (eni_vcc->tx)
				length += sprintf(page+length,"tx[%d], txing %d bytes",
				    eni_vcc->tx->index,eni_vcc->txing);
			page[length] = '\n';
			read_unlock(&vcc_sklist_lock);
			return length+1;
		}
	}
	read_unlock(&vcc_sklist_lock);
	for (i = 0; i < eni_dev->free_len; i++) {
		struct eni_free *fe = eni_dev->free_list+i;
		unsigned long offset;

		if (--left) continue;
		offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
		return sprintf(page,"free      %p-%p (%6d bytes)\n",
		    fe->start-offset,fe->start-offset+(1 << fe->order)-1,
		    1 << fe->order);
	}
	return 0;
}