1 files changed, 146 insertions, 0 deletions
diff --git a/src/udev-builtin-kmod.c b/src/udev-builtin-kmod.c
new file mode 100644
index 0000000000..6719432c08
--- /dev/null
+++ b/src/udev-builtin-kmod.c
@@ -0,0 +1,146 @@
+/*
+ * load kernel modules
+ *
+ * Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2011 ProFUSION embedded systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <libkmod.h>
+
+#include "udev.h"
+
+static struct kmod_ctx *ctx;
+
+static int load_module(struct udev *udev, const char *alias)
+{
+	struct kmod_list *list = NULL;
+	struct kmod_list *listb = NULL;
+	struct kmod_list *l;
+	int err;
+
+	err = kmod_module_new_from_lookup(ctx, alias, &list);
+	if (err < 0)
+		return err;
+
+	err = kmod_module_get_filtered_blacklist(ctx, list, &listb);
+	if (err < 0)
+		return err;
+
+	if (list == NULL)
+		info(udev, "no module matches '%s'\n", alias);
+
+	kmod_list_foreach(l, listb) {
+		struct kmod_module *mod = kmod_module_get_module(l);
+
+		err = kmod_module_probe_insert_module(mod, 0, NULL, NULL, NULL);
+		if (err >=0 )
+			info(udev, "inserted '%s'\n", kmod_module_get_name(mod));
+		else
+			info(udev, "failed to insert '%s'\n", kmod_module_get_name(mod));
+
+		kmod_module_unref(mod);
+	}
+
+	kmod_module_unref_list(list);
+	kmod_module_unref_list(listb);
+	return err;
+}
+
+static void udev_kmod_log(void *data, int priority, const char *file, int line,
+			  const char *fn, const char *format, va_list args)
+{
+	udev_main_log(data, priority, file, line, fn, format, args);
+}
+
+/* needs to re-instantiate the context after a reload */
+static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool test)
+{
+	struct udev *udev = udev_device_get_udev(dev);
+	int i;
+
+	if (!ctx) {
+		ctx = kmod_new(NULL, NULL);
+		if (!ctx)
+			return -ENOMEM;
+
+		info(udev, "load module index\n");
+		kmod_set_log_fn(ctx, udev_kmod_log, udev);
+		kmod_load_resources(ctx);
+	}
+
+	if (argc < 3 || strcmp(argv[1], "load")) {
+		err(udev, "expect: %s load <module>\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	for (i = 2; argv[i]; i++) {
+		info(udev, "execute '%s' '%s'\n", argv[1], argv[i]);
+		load_module(udev, argv[i]);
+	}
+
+	return EXIT_SUCCESS;
+}
+
+/* called at udev startup */
+static int builtin_kmod_init(struct udev *udev)
+{
+	if (ctx)
+		return 0;
+
+	ctx = kmod_new(NULL, NULL);
+	if (!ctx)
+		return -ENOMEM;
+
+	info(udev, "load module index\n");
+	kmod_set_log_fn(ctx, udev_kmod_log, udev);
+	kmod_load_resources(ctx);
+	return 0;
+}
+
+/* called on udev shutdown and reload request */
+static void builtin_kmod_exit(struct udev *udev)
+{
+	info(udev, "unload module index\n");
+	ctx = kmod_unref(ctx);
+}
+
+/* called every couple of seconds during event activity; 'true' if config has changed */
+static bool builtin_kmod_validate(struct udev *udev)
+{
+	info(udev, "validate module index\n");
+	if (kmod_validate_resources(ctx) != KMOD_RESOURCES_OK)
+		return true;
+	return false;
+}
+
+const struct udev_builtin udev_builtin_kmod = {
+	.name = "kmod",
+	.cmd = builtin_kmod,
+	.init = builtin_kmod_init,
+	.exit = builtin_kmod_exit,
+	.validate = builtin_kmod_validate,
+	.help = "kernel module loader",
+	.run_once = false,
+};