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[Qemu-devel] [PATCH 7/8] xen/9pfs: send responses back to the frontend
From: |
Stefano Stabellini |
Subject: |
[Qemu-devel] [PATCH 7/8] xen/9pfs: send responses back to the frontend |
Date: |
Mon, 6 Mar 2017 18:12:47 -0800 |
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 <address@hidden>
CC: address@hidden
CC: address@hidden
CC: Aneesh Kumar K.V <address@hidden>
CC: Greg Kurz <address@hidden>
---
hw/9pfs/xen-9p-backend.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index 0570e07..80a8810 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -166,6 +166,22 @@ static void xen_9pfs_init_in_iov_from_pdu(V9fsPDU *pdu,
static void xen_9pfs_push_and_notify(V9fsPDU *pdu)
{
+ RING_IDX prod;
+ struct Xen9pfsDev *priv = container_of(pdu->s, struct Xen9pfsDev, state);
+ struct Xen9pfsRing *ring = &priv->rings[pdu->tag % priv->num_rings];
+
+ 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 = {
--
1.9.1
- [Qemu-devel] [PATCH 0/8] xen/9pfs: introduce the Xen 9pfs backend, Stefano Stabellini, 2017/03/06
- [Qemu-devel] [PATCH 2/8] xen: introduce the header file for the Xen 9pfs transport protocol, Stefano Stabellini, 2017/03/06
- [Qemu-devel] [PATCH 5/8] xen/9pfs: receive requests from the frontend, Stefano Stabellini, 2017/03/06
- [Qemu-devel] [PATCH 4/8] xen/9pfs: connect to the frontend, Stefano Stabellini, 2017/03/06
- [Qemu-devel] [PATCH 7/8] xen/9pfs: send responses back to the frontend,
Stefano Stabellini <=
- [Qemu-devel] [PATCH 8/8] xen/9pfs: build and register Xen 9pfs backend, Stefano Stabellini, 2017/03/06
- [Qemu-devel] [PATCH 6/8] xen/9pfs: implement in/out_iov_from_pdu and vmarshal/vunmarshal, Stefano Stabellini, 2017/03/06