On Wed, 9 May 2007 16:38:35 -0700
Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx> wrote:
> Send an uevent to user space to indicate that a media change event has occurred.
>
> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
>
> Index: 2.6-git/block/genhd.c
> ===================================================================
> --- 2.6-git.orig/block/genhd.c
> +++ 2.6-git/block/genhd.c
> @@ -643,6 +643,27 @@ struct seq_operations diskstats_op = {
> .show = diskstats_show
> };
>
> +static void media_change_notify_thread(struct work_struct *work)
> +{
> + struct gendisk *gd = container_of(work, struct gendisk, async_notify);
> + char event[] = "MEDIA_CHANGE=1";
> + char *envp[] = { event, NULL };
> +
> + /*
> + * set enviroment vars to indicate which event this is for
> + * so that user space will know to go check the media status.
> + */
> + kobject_uevent_env(&gd->kobj, KOBJ_CHANGE, envp);
> + put_device(gd->driverfs_dev);
> +}
> +
> +void genhd_media_change_notify(struct gendisk *disk)
> +{
> + get_device(disk->driverfs_dev);
> + schedule_work(&disk->async_notify);
> +}
> +EXPORT_SYMBOL_GPL(genhd_media_change_notify);
> +
> struct gendisk *alloc_disk(int minors)
> {
> return alloc_disk_node(minors, -1);
> @@ -672,6 +693,8 @@ struct gendisk *alloc_disk_node(int mino
> kobj_set_kset_s(disk,block_subsys);
> kobject_init(&disk->kobj);
> rand_initialize_disk(disk);
> + INIT_WORK(&disk->async_notify,
> + media_change_notify_thread);
> }
> return disk;
Why does this do a schedule_work() rather than calling kobject_uevent_env()
directly?
-
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