9pfs: move handle_9p_output and make it static function

It's only used in virtio device.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index cfad13afe7..bc103b7fa7 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -19,6 +19,7 @@
 #include "9p-xattr.h"
 #include "coth.h"
 #include "hw/virtio/virtio-access.h"
+#include "qemu/iov.h"
 
 void virtio_9p_push_and_notify(V9fsPDU *pdu)
 {
@@ -31,6 +32,39 @@ void virtio_9p_push_and_notify(V9fsPDU *pdu)
     virtio_notify(VIRTIO_DEVICE(s), s->vq);
 }
 
+static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
+{
+    V9fsState *s = (V9fsState *)vdev;
+    V9fsPDU *pdu;
+    ssize_t len;
+
+    while ((pdu = pdu_alloc(s)) &&
+            (len = virtqueue_pop(vq, &pdu->elem)) != 0) {
+        struct {
+            uint32_t size_le;
+            uint8_t id;
+            uint16_t tag_le;
+        } QEMU_PACKED out;
+        int len;
+
+        BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
+        QEMU_BUILD_BUG_ON(sizeof out != 7);
+
+        len = iov_to_buf(pdu->elem.out_sg, pdu->elem.out_num, 0,
+                         &out, sizeof out);
+        BUG_ON(len != sizeof out);
+
+        pdu->size = le32_to_cpu(out.size_le);
+
+        pdu->id = out.id;
+        pdu->tag = le16_to_cpu(out.tag_le);
+
+        qemu_co_queue_init(&pdu->complete);
+        pdu_submit(pdu);
+    }
+    pdu_free(pdu);
+}
+
 static uint64_t virtio_9p_get_features(VirtIODevice *vdev, uint64_t features,
                                        Error **errp)
 {