ethtool: Report driver features described in struct ethtool_drvinfo

ETHTOOL_GDRVINFO fills out struct ethtool_drvinfo with the size of the
data returned by various other operations.  The size should be non-zero
if and only if the driver implements that operation.  Therefore, we can
report whether the driver supports certain operations without actually
trying them (which may be expensive and disruptive).

Do this in dump_drvinfo() rather than adding a separation operation.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/ethtool.c b/ethtool.c
index e9cb2c9..32df0ee 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -1423,11 +1423,19 @@ static int dump_drvinfo(struct ethtool_drvinfo *info)
 		"driver: %s\n"
 		"version: %s\n"
 		"firmware-version: %s\n"
-		"bus-info: %s\n",
+		"bus-info: %s\n"
+		"supports-statistics: %s\n"
+		"supports-test: %s\n"
+		"supports-eeprom-access: %s\n"
+		"supports-register-dump: %s\n",
 		info->driver,
 		info->version,
 		info->fw_version,
-		info->bus_info);
+		info->bus_info,
+		info->n_stats ? "yes" : "no",
+		info->testinfo_len ? "yes" : "no",
+		info->eedump_len ? "yes" : "no",
+		info->regdump_len ? "yes" : "no");
 
 	return 0;
 }