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authorStefano Stabellini <sstabellini@kernel.org>2017-03-22 10:16:09 -0700
committerStefano Stabellini <sstabellini@kernel.org>2017-04-25 11:04:33 -0700
commit4476e09e34d4257d2bfbdb70d106a154f42c928b (patch)
treec2196451ca695d75f68550b77be2d0d266e703a8 /hw/9pfs/xen-9p-backend.c
parent40a2389207fb1a7ee179a9eba1b2fe9a5584bbc3 (diff)
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: Stefano 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>
Diffstat (limited to 'hw/9pfs/xen-9p-backend.c')
-rw-r--r--hw/9pfs/xen-9p-backend.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index 9068703697..9c7f41af99 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -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 = {