Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 100 insertions, 0 deletions

diff --git a/hw/net/rocker/rocker_world.c b/hw/net/rocker/rocker_world.c
new file mode 100644
index 000000000..f73c5340e
--- /dev/null
+++ b/hw/net/rocker/rocker_world.c
@@ -0,0 +1,100 @@
+/*
+ * QEMU rocker switch emulation - switch worlds
+ *
+ * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/iov.h"
+
+#include "rocker.h"
+#include "rocker_world.h"
+
+struct world {
+    Rocker *r;
+    enum rocker_world_type type;
+    WorldOps *ops;
+};
+
+ssize_t world_ingress(World *world, uint32_t pport,
+                      const struct iovec *iov, int iovcnt)
+{
+    if (world->ops->ig) {
+        return world->ops->ig(world, pport, iov, iovcnt);
+    }
+
+    return -1;
+}
+
+int world_do_cmd(World *world, DescInfo *info,
+                 char *buf, uint16_t cmd, RockerTlv *cmd_info_tlv)
+{
+    if (world->ops->cmd) {
+        return world->ops->cmd(world, info, buf, cmd, cmd_info_tlv);
+    }
+
+    return -ROCKER_ENOTSUP;
+}
+
+World *world_alloc(Rocker *r, size_t sizeof_private,
+                   enum rocker_world_type type, WorldOps *ops)
+{
+    World *w = g_malloc0(sizeof(World) + sizeof_private);
+
+    w->r = r;
+    w->type = type;
+    w->ops = ops;
+    if (w->ops->init) {
+        w->ops->init(w);
+    }
+
+    return w;
+}
+
+void world_free(World *world)
+{
+    if (world->ops->uninit) {
+        world->ops->uninit(world);
+    }
+    g_free(world);
+}
+
+void world_reset(World *world)
+{
+    if (world->ops->uninit) {
+        world->ops->uninit(world);
+    }
+    if (world->ops->init) {
+        world->ops->init(world);
+    }
+}
+
+void *world_private(World *world)
+{
+    return world + 1;
+}
+
+Rocker *world_rocker(World *world)
+{
+    return world->r;
+}
+
+enum rocker_world_type world_type(World *world)
+{
+    return world->type;
+}
+
+const char *world_name(World *world)
+{
+    return world->ops->name;
+}