9p: send uevent after adding/removing mount_tag attribute (e0d6cb9c) · Commits · 戴 / test

This driver adds an attribute to the existing virtio device so a CHANGE event is required in order udev rules to make use of it. The ADD event happens before this driver is probed and unlike a more typical driver like a block device there isn't a higher level device to watch for. Signed-off-by:

Michael Marineau <michael.marineau@coreos.com> Signed-off-by:

Eric Van Hensbergen <ericvh@gmail.com>

net/9p/trans_virtio.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -577,6 +577,10 @@ static int p9_virtio_probe(struct virtio_device *vdev)
		mutex_lock(&virtio_9p_lock);
		list_add_tail(&chan->chan_list, &virtio_chan_list);
		mutex_unlock(&virtio_9p_lock);

		/* Let udev rules use the new mount_tag attribute. */
		kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);

		return 0;

		out_free_tag:
		@@ -654,6 +658,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
		list_del(&chan->chan_list);
		mutex_unlock(&virtio_9p_lock);
		sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
		kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
		kfree(chan->tag);
		kfree(chan->vc_wq);
		kfree(chan);

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