Add qemu 2.4.0

[kvmfornfv.git] / qemu / net / vde.c

diff --git a/qemu/net/vde.c b/qemu/net/vde.c
new file mode 100644 (file)
index 0000000..dacaa64
--- /dev/null
+++ b/qemu/net/vde.c
@@ -0,0 +1,128 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "config-host.h"
+
+#include <libvdeplug.h>
+
+#include "net/net.h"
+#include "clients.h"
+#include "qemu-common.h"
+#include "qemu/option.h"
+#include "qemu/main-loop.h"
+
+typedef struct VDEState {
+    NetClientState nc;
+    VDECONN *vde;
+} VDEState;
+
+static void vde_to_qemu(void *opaque)
+{
+    VDEState *s = opaque;
+    uint8_t buf[NET_BUFSIZE];
+    int size;
+
+    size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
+    if (size > 0) {
+        qemu_send_packet(&s->nc, buf, size);
+    }
+}
+
+static ssize_t vde_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+    VDEState *s = DO_UPCAST(VDEState, nc, nc);
+    ssize_t ret;
+
+    do {
+      ret = vde_send(s->vde, (const char *)buf, size, 0);
+    } while (ret < 0 && errno == EINTR);
+
+    return ret;
+}
+
+static void vde_cleanup(NetClientState *nc)
+{
+    VDEState *s = DO_UPCAST(VDEState, nc, nc);
+    qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
+    vde_close(s->vde);
+}
+
+static NetClientInfo net_vde_info = {
+    .type = NET_CLIENT_OPTIONS_KIND_VDE,
+    .size = sizeof(VDEState),
+    .receive = vde_receive,
+    .cleanup = vde_cleanup,
+};
+
+static int net_vde_init(NetClientState *peer, const char *model,
+                        const char *name, const char *sock,
+                        int port, const char *group, int mode)
+{
+    NetClientState *nc;
+    VDEState *s;
+    VDECONN *vde;
+    char *init_group = (char *)group;
+    char *init_sock = (char *)sock;
+
+    struct vde_open_args args = {
+        .port = port,
+        .group = init_group,
+        .mode = mode,
+    };
+
+    vde = vde_open(init_sock, (char *)"QEMU", &args);
+    if (!vde){
+        return -1;
+    }
+
+    nc = qemu_new_net_client(&net_vde_info, peer, model, name);
+
+    snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
+             sock, vde_datafd(vde));
+
+    s = DO_UPCAST(VDEState, nc, nc);
+
+    s->vde = vde;
+
+    qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
+
+    return 0;
+}
+
+int net_init_vde(const NetClientOptions *opts, const char *name,
+                 NetClientState *peer, Error **errp)
+{
+    /* FIXME error_setg(errp, ...) on failure */
+    const NetdevVdeOptions *vde;
+
+    assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VDE);
+    vde = opts->vde;
+
+    /* missing optional values have been initialized to "all bits zero" */
+    if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group,
+                     vde->has_mode ? vde->mode : 0700) == -1) {
+        return -1;
+    }
+
+    return 0;
+}