From 5f6f6664bf24dc53f4bf98ba812d55ca93684cd5 Mon Sep 17 00:00:00 2001 From: Nikolay Nikolaev Date: Tue, 27 May 2014 15:06:02 +0300 Subject: Add vhost-user as a vhost backend. The initialization takes a chardev backed by a unix domain socket. It should implement qemu_fe_set_msgfds in order to be able to pass file descriptors to the remote process. Each ioctl request of vhost-kernel has a vhost-user message equivalent, which is sent over the control socket. The general approach is to copy the data from the supplied argument pointer to a designated field in the message. If a file descriptor is to be passed it will be placed in the fds array for inclusion in the sendmsg control header. VHOST_SET_MEM_TABLE ignores the supplied vhost_memory structure and scans the global ram_list for ram blocks with a valid fd field set. This would be set when the '-object memory-file' option with share=on property is used. Signed-off-by: Antonios Motakis Signed-off-by: Nikolay Nikolaev Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/vhost-backend.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'hw/virtio/vhost-backend.c') diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c index 509e103408..35316c40d9 100644 --- a/hw/virtio/vhost-backend.c +++ b/hw/virtio/vhost-backend.c @@ -14,6 +14,8 @@ #include +extern const VhostOps user_ops; + static int vhost_kernel_call(struct vhost_dev *dev, unsigned long int request, void *arg) { @@ -57,6 +59,9 @@ int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type) case VHOST_BACKEND_TYPE_KERNEL: dev->vhost_ops = &kernel_ops; break; + case VHOST_BACKEND_TYPE_USER: + dev->vhost_ops = &user_ops; + break; default: error_report("Unknown vhost backend type\n"); r = -1; -- cgit v1.2.3