vhost: make vhost work queue visible (163049ae) · Commits · 戴 / test

The vhost work queue allows processing to be done in vhost worker thread context, which uses the owner process mm. Access to the vring and guest memory is typically only possible from vhost worker context so it is useful to allow work to be queued directly by users. Currently vhost_net only uses the poll wrappers which do not expose the work queue functions. However, for tcm_vhost (vhost_scsi) it will be necessary to queue custom work. Signed-off-by:

Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Cc: Zhi Yong Wu <wuzhy@cn.ibm.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:

Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by:

Michael S. Tsirkin <mst@redhat.com>

drivers/vhost/vhost.c

+2 −3

Original line number	Diff line number	Diff line
		@@ -64,7 +64,7 @@ static int vhost_poll_wakeup(wait_queue_t *wait, unsigned mode, int sync,
		return 0;
		}

		static void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn)
		void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn)
		{
		INIT_LIST_HEAD(&work->node);
		work->fn = fn;
		@@ -137,8 +137,7 @@ void vhost_poll_flush(struct vhost_poll *poll)
		vhost_work_flush(poll->dev, &poll->work);
		}

		static inline void vhost_work_queue(struct vhost_dev *dev,
		struct vhost_work *work)
		void vhost_work_queue(struct vhost_dev dev, struct vhost_work work)
		{
		unsigned long flags;

drivers/vhost/vhost.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -43,6 +43,9 @@ struct vhost_poll {
		struct vhost_dev *dev;
		};

		void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);
		void vhost_work_queue(struct vhost_dev dev, struct vhost_work work);

		void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
		unsigned long mask, struct vhost_dev *dev);
		void vhost_poll_start(struct vhost_poll poll, struct file file);

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