builtin: kmod - switch to kmod_module_probe_insert_module()

[elogind.git] / udev / udev-builtin-kmod.c

diff --git a/udev/udev-builtin-kmod.c b/udev/udev-builtin-kmod.c
index df057735d786105b526521fc7e1b6bf92ecfe77b..a5c76fc214d21c15ece146233020dcf8b95deddf 100644 (file)
--- a/udev/udev-builtin-kmod.c
+++ b/udev/udev-builtin-kmod.c
@@ -1,7 +1,8 @@
 /*
- * probe disks for filesystems and partitions
+ * 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
@@ -25,18 +26,119 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
+#include <libkmod.h>
 
 #include "udev.h"
 
-static int builtin_kmod(struct udev_device *dev, const char *command, bool test)
+static struct kmod_ctx *ctx;
+
+static int load_module(struct udev *udev, const char *alias)
 {
-       printf("soon we load a module here: '%s'\n", command);
+       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)
+{
+       ctx = kmod_unref(ctx);
+       info(udev, "unload module index\n");
+}
+
+/* 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");
+       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,
 };