udevd: use udev_list_node

[elogind.git] / udev / udevd.c

diff --git a/udev/udevd.c b/udev/udevd.c
index 0c82e56dc5291b9b9d4502715afdf2546e9c5982..576f9e82331087cf8a43df0b5cc7cdc89211f3c7 100644 (file)
--- a/udev/udevd.c
+++ b/udev/udevd.c
@@ -72,8 +72,8 @@ static int run_exec_q;
 static int stop_exec_q;
 static int max_childs;
 
-static LIST_HEAD(exec_list);
-static LIST_HEAD(running_list);
+static struct udev_list_node exec_list;
+static struct udev_list_node running_list;
 
 enum event_state {
        EVENT_QUEUED,
@@ -81,6 +81,15 @@ enum event_state {
        EVENT_FAILED,
 };
 
+static struct udev_event *node_to_event(struct udev_list_node *node)
+{
+       char *event;
+
+       event = (char *)node;
+       event -= offsetof(struct udev_event, node);
+       return (struct udev_event *)event;
+}
+
 static void export_event_state(struct udev_event *event, enum event_state state)
 {
        char filename[UTIL_PATH_SIZE];
@@ -144,7 +153,7 @@ static void export_event_state(struct udev_event *event, enum event_state state)
 
 static void event_queue_delete(struct udev_event *event)
 {
-       list_del(&event->node);
+       udev_list_node_remove(&event->node);
 
        /* mark as failed, if "add" event returns non-zero */
        if (event->exitstatus && strcmp(udev_device_get_action(event->dev), "add") == 0)
@@ -255,7 +264,7 @@ static void event_queue_insert(struct udev_event *event)
 
        /* run one event after the other in debug mode */
        if (debug_trace) {
-               list_add_tail(&event->node, &running_list);
+               udev_list_node_append(&event->node, &running_list);
                event_fork(event);
                waitpid(event->pid, NULL, 0);
                event_queue_delete(event);
@@ -264,12 +273,12 @@ static void event_queue_insert(struct udev_event *event)
 
        /* run all events with a timeout set immediately */
        if (udev_device_get_timeout(event->dev) > 0) {
-               list_add_tail(&event->node, &running_list);
+               udev_list_node_append(&event->node, &running_list);
                event_fork(event);
                return;
        }
 
-       list_add_tail(&event->node, &exec_list);
+       udev_list_node_append(&event->node, &exec_list);
        run_exec_q = 1;
 }
 
@@ -324,11 +333,13 @@ static int compare_devpath(const char *running, const char *waiting)
 /* lookup event for identical, parent, child, or physical device */
 static int devpath_busy(struct udev_event *event, int limit)
 {
-       struct udev_event *loop_event;
+       struct udev_list_node *loop;
        int childs_count = 0;
 
        /* check exec-queue which may still contain delayed events we depend on */
-       list_for_each_entry(loop_event, &exec_list, node) {
+       udev_list_node_foreach(loop, &exec_list) {
+               struct udev_event *loop_event = node_to_event(loop);
+
                /* skip ourself and all later events */
                if (udev_device_get_seqnum(loop_event->dev) >= udev_device_get_seqnum(event->dev))
                        break;
@@ -372,8 +383,8 @@ static int devpath_busy(struct udev_event *event, int limit)
        }
 
        /* check run queue for still running events */
-       list_for_each_entry(loop_event, &running_list, node) {
-               childs_count++;
+       udev_list_node_foreach(loop, &running_list) {
+               struct udev_event *loop_event = node_to_event(loop);
 
                if (childs_count++ >= limit) {
                        info(event->udev, "%llu, maximum number (%i) of childs reached\n",
@@ -424,13 +435,15 @@ static int devpath_busy(struct udev_event *event, int limit)
 /* serializes events for the identical and parent and child devices */
 static void event_queue_manager(struct udev *udev)
 {
-       struct udev_event *loop_event;
-       struct udev_event *tmp_event;
+       struct udev_list_node *loop;
+       struct udev_list_node *tmp;
 
-       if (list_empty(&exec_list))
+       if (udev_list_is_empty(&exec_list))
                return;
 
-       list_for_each_entry_safe(loop_event, tmp_event, &exec_list, node) {
+       udev_list_node_foreach_safe(loop, tmp, &exec_list) {
+               struct udev_event *loop_event = node_to_event(loop);
+
                /* serialize and wait for parent or child events */
                if (devpath_busy(loop_event, max_childs) != 0) {
                        dbg(udev, "delay seq %llu (%s)\n",
@@ -440,7 +453,8 @@ static void event_queue_manager(struct udev *udev)
                }
 
                /* move event to run list */
-               list_move_tail(&loop_event->node, &running_list);
+               udev_list_node_remove(&loop_event->node);
+               udev_list_node_append(&loop_event->node, &running_list);
                event_fork(loop_event);
                dbg(udev, "moved seq %llu to running list\n", udev_device_get_seqnum(loop_event->dev));
        }
@@ -537,16 +551,18 @@ static void asmlinkage sig_handler(int signum)
 
 static void udev_done(int pid, int exitstatus)
 {
+       struct udev_list_node *loop;
+
        /* find event associated with pid and delete it */
-       struct udev_event *event;
+       udev_list_node_foreach(loop, &running_list) {
+               struct udev_event *loop_event = node_to_event(loop);
 
-       list_for_each_entry(event, &running_list, node) {
-               if (event->pid == pid) {
-                       info(event->udev, "seq %llu cleanup, pid [%d], status %i, %ld seconds old\n",
-                            udev_device_get_seqnum(event->dev), event->pid,
-                            exitstatus, time(NULL) - event->queue_time);
-                       event->exitstatus = exitstatus;
-                       event_queue_delete(event);
+               if (loop_event->pid == pid) {
+                       info(loop_event->udev, "seq %llu cleanup, pid [%d], status %i, %ld seconds old\n",
+                            udev_device_get_seqnum(loop_event->dev), loop_event->pid,
+                            exitstatus, time(NULL) - loop_event->queue_time);
+                       loop_event->exitstatus = exitstatus;
+                       event_queue_delete(loop_event);
 
                        /* there may be events waiting with the same devpath */
                        run_exec_q = 1;
@@ -733,6 +749,8 @@ int main(int argc, char *argv[])
                goto exit;
        }
 
+       udev_list_init(&running_list);
+       udev_list_init(&exec_list);
        udev_rules_init(udev, &rules, 1);
        export_initial_seqnum(udev);