From 8ce7ad7b2d11fae2c3d285a6a0caea9322c0b8fc Mon Sep 17 00:00:00 2001 From: Kristen Carlson Accardi Date: Wed, 23 May 2007 13:57:38 -0700 Subject: genhd: send async notification on media change Send an uevent to user space to indicate that a media change event has occurred. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- block/genhd.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'block') diff --git a/block/genhd.c b/block/genhd.c index 7efa8bb25da9..863a8c0623ed 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -696,6 +696,27 @@ 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); @@ -725,6 +746,8 @@ struct gendisk *alloc_disk_node(int minors, int node_id) 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; } -- cgit v1.2.3-59-g8ed1b