On 08/15/14 11:12, Santosh Shilimkar wrote:


I am curious about these two calls below(netcp_process_one_rx_packet
and netcp_tx_submit_skb):
On tx you seem to be broadcasting to all "sub-modules" and on receive
you seem to be invoking from all as well.
I couldnt find the code for any of the sub-modules but i suspect
things like switching/bridging or ipsec etc could be sub-modules.
If yes, have you thought about integrating these features into
Linux proper instead?

cheers,
jamal

+
+static inline int netcp_process_one_rx_packet(struct netcp_intf *netcp)
+{

+
+	/* Call each of the RX hooks */
+	p_info.skb = skb;
+	p_info.rxtstamp_complete = false;
+	list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
+		int ret;
+
+		ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
+					&p_info);
+		if (unlikely(ret)) {
+			dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
+				rx_hook->order, ret);
+			netcp->ndev->stats.rx_errors++;
+			dev_kfree_skb(skb);
+			return 0;
+		}
+	}

..
....

+	return 0;
+}

[..]

+static inline int netcp_tx_submit_skb(struct netcp_intf *netcp,
+				      struct sk_buff *skb,
+				      struct knav_dma_desc *desc)
+{
+	struct netcp_tx_pipe *tx_pipe = NULL;

+
+	p_info.netcp = netcp;
+	p_info.skb = skb;
+	p_info.tx_pipe = NULL;
+	p_info.psdata_len = 0;
+	p_info.ts_context = NULL;
+	p_info.txtstamp_complete = NULL;
+	p_info.epib = desc->epib;
+	p_info.psdata = desc->psdata;
+	memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(u32));
+
+	/* Find out where to inject the packet for transmission */
+	list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
+		ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
+					&p_info);
+		if (unlikely(ret != 0)) {
+			dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
+				tx_hook->order, ret);
+			ret = (ret < 0) ? ret : NETDEV_TX_OK;
+			goto out;
+		}
+	}
+