netlink linux: account for the netnsid netlink attr.

The buffer needs to be reallocated and data copied when
the netnsid netlink attribute is included, so avoid that
by accounting the attribute when the buffer is initially
allocated.

Fixes: 756819ddd788 ("netdev-linux: use netlink to update netdev.")
Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Flavio Leitner <fbl@sysclose.org>
Signed-off-by: Ben Pfaff <blp@ovn.org>

diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
index 776d938eee8a170b4ca0ee2a8042bbef0bbf124e..7c0f5170067aab9e3cb06d01d76f05842a360e68 100644 (file)
--- a/lib/netdev-linux.c
+++ b/lib/netdev-linux.c
@@ -6047,8 +6047,8 @@ netdev_linux_update_via_netlink(struct netdev_linux *netdev)
 
     ofpbuf_init(&request, 0);
     nl_msg_put_nlmsghdr(&request,
-                        sizeof(struct ifinfomsg) + NL_ATTR_SIZE(IFNAMSIZ),
-                        RTM_GETLINK, NLM_F_REQUEST);
+                        sizeof(struct ifinfomsg) + NL_ATTR_SIZE(IFNAMSIZ) +
+                        NL_A_U32_SIZE, RTM_GETLINK, NLM_F_REQUEST);
     ofpbuf_put_zeros(&request, sizeof(struct ifinfomsg));
 
     /* The correct identifiers for a Linux device are netnsid and ifindex,