1 files changed, 113 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..a308a21
--- /dev/null
+++ b/src/udev/udev-builtin-net_setup_link.c
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "device-util.h"
+#include "escape.h"
+#include "errno-util.h"
+#include "link-config.h"
+#include "log.h"
+#include "string-util.h"
+#include "strv.h"
+#include "udev-builtin.h"
+
+static LinkConfigContext *ctx = NULL;
+
+static int builtin_net_setup_link(UdevEvent *event, int argc, char **argv, bool test) {
+        sd_device *dev = ASSERT_PTR(ASSERT_PTR(event)->dev);
+        _cleanup_(link_freep) Link *link = NULL;
+        _cleanup_free_ char *joined = NULL;
+        int r;
+
+        if (argc > 1)
+                return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
+
+        r = link_new(ctx, &event->rtnl, dev, &link);
+        if (r == -ENODEV) {
+                log_device_debug_errno(dev, r, "Link vanished while getting information, ignoring.");
+                return 0;
+        }
+        if (r < 0)
+                return log_device_warning_errno(dev, r, "Failed to get link information: %m");
+
+        r = link_get_config(ctx, link);
+        if (r < 0) {
+                if (r == -ENOENT) {
+                        log_device_debug_errno(dev, r, "No matching link configuration found, ignoring device.");
+                        return 0;
+                }
+
+                return log_device_error_errno(dev, r, "Failed to get link config: %m");
+        }
+
+        r = link_apply_config(ctx, &event->rtnl, link);
+        if (r == -ENODEV)
+                log_device_debug_errno(dev, r, "Link vanished while applying configuration, ignoring.");
+        else if (r < 0)
+                log_device_warning_errno(dev, r, "Could not apply link configuration, ignoring: %m");
+
+        udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE", link->config->filename);
+        if (link->new_name)
+                udev_builtin_add_property(dev, test, "ID_NET_NAME", link->new_name);
+
+        event->altnames = TAKE_PTR(link->altnames);
+
+        STRV_FOREACH(d, link->config->dropins) {
+                _cleanup_free_ char *escaped = NULL;
+
+                escaped = xescape(*d, ":");
+                if (!escaped)
+                        return log_oom();
+
+                if (!strextend_with_separator(&joined, ":", escaped))
+                        return log_oom();
+        }
+
+        udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE_DROPINS", joined);
+
+        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) {
+        ctx = link_config_ctx_free(ctx);
+        log_debug("Unloaded link configuration context.");
+}
+
+static bool builtin_net_setup_link_should_reload(void) {
+        if (!ctx)
+                return false;
+
+        if (link_config_should_reload(ctx)) {
+                log_debug("Link configuration context needs reloading.");
+                return true;
+        }
+
+        return false;
+}
+
+const UdevBuiltin 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,
+        .should_reload = builtin_net_setup_link_should_reload,
+        .help = "Configure network link",
+        .run_once = false,
+};