1 files changed, 43 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-net_driver.c b/src/udev/udev-builtin-net_driver.c
new file mode 100644
index 0000000..f1642a4
--- /dev/null
+++ b/src/udev/udev-builtin-net_driver.c
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "device-util.h"
+#include "errno-util.h"
+#include "ethtool-util.h"
+#include "fd-util.h"
+#include "log.h"
+#include "string-util.h"
+#include "udev-builtin.h"
+
+static int builtin_net_driver_set_driver(UdevEvent *event, int argc, char **argv, bool test) {
+        sd_device *dev = ASSERT_PTR(ASSERT_PTR(event)->dev);
+        _cleanup_close_ int ethtool_fd = -EBADF;
+        _cleanup_free_ char *driver = NULL;
+        const char *sysname;
+        int r;
+
+        r = sd_device_get_sysname(dev, &sysname);
+        if (r < 0)
+                return log_device_warning_errno(dev, r, "Failed to get sysname: %m");
+
+        r = ethtool_get_driver(&ethtool_fd, sysname, &driver);
+        if (ERRNO_IS_NEG_NOT_SUPPORTED(r)) {
+                log_device_debug_errno(dev, r, "Querying driver name via ethtool API is not supported by device '%s', ignoring: %m", sysname);
+                return 0;
+        }
+        if (r == -ENODEV) {
+                log_device_debug_errno(dev, r, "Device already vanished, ignoring.");
+                return 0;
+        }
+        if (r < 0)
+                return log_device_warning_errno(dev, r, "Failed to get driver for '%s': %m", sysname);
+
+        return udev_builtin_add_property(event->dev, test, "ID_NET_DRIVER", driver);
+}
+
+const UdevBuiltin udev_builtin_net_driver = {
+        .name = "net_driver",
+        .cmd = builtin_net_driver_set_driver,
+        .help = "Set driver for network device",
+        .run_once = true,
+};