Commit 4476e09e authored by Stefano Stabellini's avatar Stefano Stabellini
Browse files

xen/9pfs: send responses back to the frontend 



Once a request is completed, xen_9pfs_push_and_notify gets called. In
xen_9pfs_push_and_notify, update the indexes (data has already been
copied to the sg by the common code) and send a notification to the
frontend.

Schedule the bottom-half to check if we already have any other requests
pending.

Signed-off-by: default avatarStefano Stabellini <stefano@aporeto.com>
CC: anthony.perard@citrix.com
CC: jgross@suse.com
CC: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
CC: Greg Kurz <groug@kaod.org>
parent 40a23892

hw/9pfs/xen-9p-backend.c

+19 −0
Original line number Diff line number Diff line
@@ -180,6 +180,25 @@ static void xen_9pfs_init_in_iov_from_pdu(V9fsPDU *pdu, 


static void xen_9pfs_push_and_notify(V9fsPDU *pdu)

{

    RING_IDX prod;

    Xen9pfsDev *priv = container_of(pdu->s, Xen9pfsDev, state);

    Xen9pfsRing *ring = &priv->rings[pdu->tag % priv->num_rings];



    g_free(ring->sg);

    ring->sg = NULL;



    ring->intf->out_cons = ring->out_cons;

    xen_wmb();



    prod = ring->intf->in_prod;

    xen_rmb();

    ring->intf->in_prod = prod + pdu->size;

    xen_wmb();



    ring->inprogress = false;

    xenevtchn_notify(ring->evtchndev, ring->local_port);



    qemu_bh_schedule(ring->bh);

}



static const struct V9fsTransport xen_9p_transport = {