diff options
| author | Stefano Stabellini <sstabellini@kernel.org> | 2017-03-22 10:16:09 -0700 |
|---|---|---|
| committer | Stefano Stabellini <sstabellini@kernel.org> | 2017-04-25 11:04:33 -0700 |
| commit | 4476e09e34d4257d2bfbdb70d106a154f42c928b (patch) | |
| tree | c2196451ca695d75f68550b77be2d0d266e703a8 /hw | |
| parent | 40a2389207fb1a7ee179a9eba1b2fe9a5584bbc3 (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')
| -rw-r--r-- | hw/9pfs/xen-9p-backend.c | 19 |
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 = { |