[PATCH 1/2] util:netlink: Enable virNetlinkNewLink to support veth

[Shi Lei <shi_lei@xxxxxxxxxxxxxx>]

Signed-off-by: Shi Lei <shi_lei@xxxxxxxxxxxxxx>
---
 src/util/virnetlink.c | 25 +++++++++++++++++++++++++
 src/util/virnetlink.h |  1 +
 2 files changed, 26 insertions(+)

diff --git a/src/util/virnetlink.c b/src/util/virnetlink.c
index fdd3a6a4..e191f63b 100644
--- a/src/util/virnetlink.c
+++ b/src/util/virnetlink.c
@@ -41,6 +41,18 @@ VIR_LOG_INIT("util.netlink");
 #define NETLINK_ACK_TIMEOUT_S  (2*1000)
 
 #if defined(WITH_LIBNL)
+
+/*
+ * VETH_INFO_PEER is defined in libnl, but it isn't exposed.
+ * We include it just like what iproute2 has done.
+ */
+enum {
+    VETH_INFO_UNSPEC,
+    VETH_INFO_PEER,
+
+    __VETH_INFO_MAX
+};
+
 /* State for a single netlink event handle */
 struct virNetlinkEventHandle {
     int watch;
@@ -535,6 +547,19 @@ virNetlinkNewLink(const char *ifname,
         NETLINK_MSG_NEST_END(nl_msg, infodata);
     }
 
+    if (STREQ(type, "veth") && extra_args && extra_args->veth_peer) {
+        struct nlattr *infoveth = NULL;
+
+        NETLINK_MSG_NEST_START(nl_msg, infodata, IFLA_INFO_DATA);
+        NETLINK_MSG_NEST_START(nl_msg, infoveth, VETH_INFO_PEER);
+        nlmsg_reserve(nl_msg, sizeof(struct ifinfomsg), 0);
+        NETLINK_MSG_PUT(nl_msg, IFLA_IFNAME,
+                        (strlen(extra_args->veth_peer) + 1),
+                        extra_args->veth_peer);
+        NETLINK_MSG_NEST_END(nl_msg, infoveth);
+        NETLINK_MSG_NEST_END(nl_msg, infodata);
+    }
+
     NETLINK_MSG_NEST_END(nl_msg, linkinfo);
 
     if (extra_args) {
diff --git a/src/util/virnetlink.h b/src/util/virnetlink.h
index 7121eac4..7c4ed202 100644
--- a/src/util/virnetlink.h
+++ b/src/util/virnetlink.h
@@ -84,6 +84,7 @@ struct _virNetlinkNewLinkData {
     const int *ifindex;             /* The index for the 'link' device */
     const virMacAddr *mac;          /* The MAC address of the device */
     const uint32_t *macvlan_mode;   /* The mode of macvlan */
+    const char *veth_peer;          /* The peer name for veth */
 };
 
 int virNetlinkNewLink(const char *ifname,
-- 
2.25.1