1 files changed, 85 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-net_setup_link.c b/src/udev/udev-builtin-net_setup_link.c
new file mode 100644
index 0000000..a845dfa
--- /dev/null
+++ b/src/udev/udev-builtin-net_setup_link.c
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "device-util.h"
+#include "alloc-util.h"
+#include "link-config.h"
+#include "log.h"
+#include "string-util.h"
+#include "udev-builtin.h"
+
+static link_config_ctx *ctx = NULL;
+
+static int builtin_net_setup_link(sd_device *dev, int argc, char **argv, bool test) {
+        _cleanup_free_ char *driver = NULL;
+        const char *name = NULL;
+        link_config *link;
+        int r;
+
+        if (argc > 1)
+                return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
+
+        r = link_get_driver(ctx, dev, &driver);
+        if (r >= 0)
+                udev_builtin_add_property(dev, test, "ID_NET_DRIVER", driver);
+
+        r = link_config_get(ctx, dev, &link);
+        if (r < 0) {
+                if (r == -ENOENT)
+                        return log_device_debug_errno(dev, r, "No matching link configuration found.");
+
+                return log_device_error_errno(dev, r, "Failed to get link config: %m");
+        }
+
+        r = link_config_apply(ctx, link, dev, &name);
+        if (r < 0)
+                log_device_warning_errno(dev, r, "Could not apply link config, ignoring: %m");
+
+        udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE", link->filename);
+
+        if (name)
+                udev_builtin_add_property(dev, test, "ID_NET_NAME", name);
+
+        return 0;
+}
+
+static int builtin_net_setup_link_init(void) {
+        int r;
+
+        if (ctx)
+                return 0;
+
+        r = link_config_ctx_new(&ctx);
+        if (r < 0)
+                return r;
+
+        r = link_config_load(ctx);
+        if (r < 0)
+                return r;
+
+        log_debug("Created link configuration context.");
+        return 0;
+}
+
+static void builtin_net_setup_link_exit(void) {
+        link_config_ctx_free(ctx);
+        ctx = NULL;
+        log_debug("Unloaded link configuration context.");
+}
+
+static bool builtin_net_setup_link_validate(void) {
+        log_debug("Check if link configuration needs reloading.");
+        if (!ctx)
+                return false;
+
+        return link_config_should_reload(ctx);
+}
+
+const struct udev_builtin udev_builtin_net_setup_link = {
+        .name = "net_setup_link",
+        .cmd = builtin_net_setup_link,
+        .init = builtin_net_setup_link_init,
+        .exit = builtin_net_setup_link_exit,
+        .validate = builtin_net_setup_link_validate,
+        .help = "Configure network link",
+        .run_once = false,
+};