Re: [PATCH net-next 5/9] net/eipoib: Add ethtool file support

On 7/10/2012 8:48 PM, Ben Hutchings wrote:

+static void parent_ethtool_get_drvinfo(struct net_device *parent_dev,
+				       struct ethtool_drvinfo *drvinfo)
+{
+	struct parent *parent = netdev_priv(parent_dev);
+
+	if (strlen(DRV_NAME) + strlen(parent->ipoib_main_interface) > 31)
+		strncpy(drvinfo->driver, "driver name is too long", 32);
Returning error messages like is stupid; either truncate or WARN.

OK

quoted

+	else
+		sprintf(drvinfo->driver, "%s:%s",
+			DRV_NAME, parent->ipoib_main_interface);

Why do you not use the separate driver and bus_info fields?

OK, we'll use the bus info field for placing the name of the PIF

quoted

+static const char parent_strings[][ETH_GSTRING_LEN] = {
+	/* public statistics */
+	"rx_packets", "tx_packets", "rx_bytes",
+	"tx_bytes", "rx_errors", "tx_errors",
+	"rx_dropped", "tx_dropped", "multicast",
+	"collisions", "rx_length_errors", "rx_over_errors",
+	"rx_crc_errors", "rx_frame_errors", "rx_fifo_errors",
+	"rx_missed_errors", "tx_aborted_errors", "tx_carrier_errors",
+	"tx_fifo_errors", "tx_heartbeat_errors", "tx_window_errors",
+#define PUB_STATS_LEN	21

[...]

This is duplicating the basic netdev statistics that are already available without
ethtool.  Most of them are completely meaningless for Infiniband, I suspect.

OK, will implement the ndo get stats entry for the basic statistics instead