device: only expose devices with SYSTEMD_EXPOSE=1, ignore all others

[elogind.git] / device.c

diff --git a/device.c b/device.c
index 1c4c32931c0caea39f71d628494d76317579a346..f906fd50021dedc822b224bc88a7784167046de5 100644 (file)
--- a/device.c
+++ b/device.c
@@ -153,28 +153,6 @@ static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) {
         return 0;
 }
 
-static bool devnode_is_api(const char *node) {
-        unsigned i;
-
-        static const char * const table[] = {
-                "/dev/null",
-                "/dev/zero",
-                "/dev/urandom",
-                "/dev/random",
-                "/dev/port",
-                "/dev/oldmem",
-                "/dev/full",
-                "/dev/kmsg",
-                "/dev/mem"
-        };
-
-        for (i = 0; i < ELEMENTSOF(table); i++)
-                if (streq(table[i], node))
-                        return true;
-
-        return false;
-}
-
 static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) {
         const char *dn, *names, *wants, *sysfs, *expose, *model;
         Unit *u = NULL;
@@ -183,35 +161,29 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
         size_t l;
         bool delete;
         struct udev_list_entry *item = NULL, *first = NULL;
+        int b;
 
         assert(m);
 
         if (!(sysfs = udev_device_get_syspath(dev)))
                 return -ENOMEM;
 
+        if (!(expose = udev_device_get_property_value(dev, "SYSTEMD_EXPOSE")))
+                return 0;
+
+        if ((b = parse_boolean(expose)) < 0) {
+                log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose);
+                return 0;
+        }
+
+        if (!b)
+                return 0;
+
         /* Check whether this entry is even relevant for us. */
         dn = udev_device_get_devnode(dev);
-        expose = udev_device_get_property_value(dev, "SYSTEMD_EXPOSE");
         names = udev_device_get_property_value(dev, "SYSTEMD_NAMES");
         wants = udev_device_get_property_value(dev, "SYSTEMD_WANTS");
 
-        if (expose) {
-                int b;
-
-                if ((b = parse_boolean(expose)) < 0) {
-                        log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose);
-                        return 0;
-                }
-
-                if (!b)
-                        return 0;
-        } else
-                if ((!dn || devnode_is_api(dn)) && !names && !wants)
-                        return 0;
-
-        /* Ok, seems kinda interesting. Now, let's see if this one
-         * already exists. */
-
         if ((r = device_find_escape_name(m, sysfs, &u)) < 0)
                 return r;
 
@@ -415,21 +387,21 @@ static int device_enumerate(Manager *m) {
         if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_watch.fd, &ev) < 0)
                 return -errno;
 
-        /* if (!(e = udev_enumerate_new(m->udev))) { */
-        /*         r = -ENOMEM; */
-        /*         goto fail; */
-        /* } */
+        if (!(e = udev_enumerate_new(m->udev))) {
+                r = -ENOMEM;
+                goto fail;
+        }
 
-        /* if (udev_enumerate_scan_devices(e) < 0) { */
-        /*         r = -EIO; */
-        /*         goto fail; */
-        /* } */
+        if (udev_enumerate_scan_devices(e) < 0) {
+                r = -EIO;
+                goto fail;
+        }
 
-        /* first = udev_enumerate_get_list_entry(e); */
-        /* udev_list_entry_foreach(item, first) */
-        /*         device_process_path(m, udev_list_entry_get_name(item), false); */
+        first = udev_enumerate_get_list_entry(e);
+        udev_list_entry_foreach(item, first)
+                device_process_path(m, udev_list_entry_get_name(item), false);
 
-        /* udev_enumerate_unref(e); */
+        udev_enumerate_unref(e);
         return 0;
 
 fail: