From 7feba1acdd806b54ec152d2e93169ab2a295128d Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Fri, 1 Apr 2011 10:17:52 -0700
Subject: [PATCH] netdev-vport: Implement 'send' function.

The new implementation of the bonding code expects to be able to send
packets on netdevs using netdev_send().  This implements it.
---
 lib/dpif-linux.c   | 28 ++++++++++++++++++++++++++++
 lib/dpif-linux.h   |  3 +++
 lib/netdev-vport.c | 38 +++++++++++++++++++++++++++++++++++++-
 3 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
index bdc77036..b5590c44 100644
--- a/lib/dpif-linux.c
+++ b/lib/dpif-linux.c
@@ -1027,6 +1027,34 @@ dpif_linux_is_internal_device(const char *name)
     return reply.type == ODP_VPORT_TYPE_INTERNAL;
 }
 
+int
+dpif_linux_vport_send(int dp_ifindex, uint32_t port_no,
+                      const void *data, size_t size)
+{
+    struct odp_header *execute;
+    struct ofpbuf *buf;
+    size_t actions_ofs;
+    int error;
+
+    buf = ofpbuf_new(128 + size);
+
+    nl_msg_put_genlmsghdr(buf, 0, odp_packet_family, NLM_F_REQUEST,
+                          ODP_PACKET_CMD_EXECUTE, 1);
+
+    execute = ofpbuf_put_uninit(buf, sizeof *execute);
+    execute->dp_ifindex = dp_ifindex;
+
+    nl_msg_put_unspec(buf, ODP_PACKET_ATTR_PACKET, data, size);
+
+    actions_ofs = nl_msg_start_nested(buf, ODP_PACKET_ATTR_ACTIONS);
+    nl_msg_put_u32(buf, ODP_ACTION_ATTR_OUTPUT, port_no);
+    nl_msg_end_nested(buf, actions_ofs);
+
+    error = nl_sock_transact(genl_sock, buf, NULL);
+    ofpbuf_delete(buf);
+    return error;
+}
+
 static void
 dpif_linux_port_changed(const struct rtnetlink_link_change *change,
                         void *dpif_)
diff --git a/lib/dpif-linux.h b/lib/dpif-linux.h
index bd7b07ca..f942a8cc 100644
--- a/lib/dpif-linux.h
+++ b/lib/dpif-linux.h
@@ -53,4 +53,7 @@ int dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply,
 
 bool dpif_linux_is_internal_device(const char *name);
 
+int dpif_linux_vport_send(int dp_ifindex, uint32_t port_no,
+                          const void *data, size_t size);
+
 #endif /* dpif-linux.h */
diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index 39a1bb94..be269415 100644
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -56,6 +56,8 @@ struct netdev_vport_notifier {
 struct netdev_dev_vport {
     struct netdev_dev netdev_dev;
     struct ofpbuf *options;
+    int dp_ifindex;             /* -1 if unknown. */
+    uint32_t port_no;           /* UINT32_MAX if unknown. */
 };
 
 struct netdev_vport {
@@ -185,10 +187,14 @@ netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
     const struct vport_class *vport_class = vport_class_cast(netdev_class);
     struct ofpbuf *options = NULL;
     struct shash fetched_args;
+    int dp_ifindex;
+    uint32_t port_no;
     int error;
 
     shash_init(&fetched_args);
 
+    dp_ifindex = -1;
+    port_no = UINT32_MAX;
     if (!shash_is_empty(args)) {
         /* Parse the provided configuration. */
         options = ofpbuf_new(64);
@@ -215,6 +221,8 @@ netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
                             name, strerror(error));
             } else {
                 options = ofpbuf_clone_data(reply.options, reply.options_len);
+                dp_ifindex = reply.dp_ifindex;
+                port_no = reply.port_no;
             }
             ofpbuf_delete(buf);
         } else {
@@ -231,6 +239,8 @@ netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
                         shash_is_empty(&fetched_args) ? args : &fetched_args,
                         netdev_class);
         dev->options = options;
+        dev->dp_ifindex = dp_ifindex;
+        dev->port_no = port_no;
 
         *netdev_devp = &dev->netdev_dev;
         route_table_register();
@@ -311,6 +321,32 @@ netdev_vport_set_config(struct netdev_dev *dev_, const struct shash *args)
     return error;
 }
 
+static int
+netdev_vport_send(struct netdev *netdev, const void *data, size_t size)
+{
+    struct netdev_dev *dev_ = netdev_get_dev(netdev);
+    struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
+
+    if (dev->dp_ifindex == -1) {
+        const char *name = netdev_get_name(netdev);
+        struct dpif_linux_vport reply;
+        struct ofpbuf *buf;
+        int error;
+
+        error = dpif_linux_vport_get(name, &reply, &buf);
+        if (error) {
+            VLOG_ERR_RL(&rl, "%s: failed to query vport for send (%s)",
+                        name, strerror(error));
+            return error;
+        }
+        dev->dp_ifindex = reply.dp_ifindex;
+        dev->port_no = reply.port_no;
+        ofpbuf_delete(buf);
+    }
+
+    return dpif_linux_vport_send(dev->dp_ifindex, dev->port_no, data, size);
+}
+
 static int
 netdev_vport_set_etheraddr(struct netdev *netdev,
                            const uint8_t mac[ETH_ADDR_LEN])
@@ -936,7 +972,7 @@ unparse_patch_config(const char *name OVS_UNUSED, const char *type OVS_UNUSED,
     NULL,                       /* recv_wait */             \
     NULL,                       /* drain */                 \
                                                             \
-    NULL,                       /* send */                  \
+    netdev_vport_send,          /* send */                  \
     NULL,                       /* send_wait */             \
                                                             \
     netdev_vport_set_etheraddr,                             \
-- 
2.30.2