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-rw-r--r--src/vnet/udp/udp.c82
1 files changed, 80 insertions, 2 deletions
diff --git a/src/vnet/udp/udp.c b/src/vnet/udp/udp.c
index e6ee9d8b37d..2400b254fd0 100644
--- a/src/vnet/udp/udp.c
+++ b/src/vnet/udp/udp.c
@@ -493,8 +493,87 @@ format_udp_listener_session (u8 * s, va_list * args)
return format (s, "%U", format_udp_connection, uc, verbose);
}
-/* *INDENT-OFF* */
+static void
+udp_realloc_ports_sv (u16 **ports_nh_svp)
+{
+ u16 port, port_no, *ports_nh_sv, *mc;
+ u32 *ports = 0, *nh = 0, msum, i;
+ sparse_vec_header_t *h;
+ uword sv_index, *mb;
+
+ ports_nh_sv = *ports_nh_svp;
+
+ for (port = 1; port < 65535; port++)
+ {
+ port_no = clib_host_to_net_u16 (port);
+
+ sv_index = sparse_vec_index (ports_nh_sv, port_no);
+ if (sv_index != SPARSE_VEC_INVALID_INDEX)
+ {
+ vec_add1 (ports, port_no);
+ vec_add1 (nh, ports_nh_sv[sv_index]);
+ }
+ }
+
+ sparse_vec_free (ports_nh_sv);
+
+ ports_nh_sv =
+ sparse_vec_new (/* elt bytes */ sizeof (ports_nh_sv[0]),
+ /* bits in index */ BITS (((udp_header_t *) 0)->dst_port));
+
+ vec_resize (ports_nh_sv, 65535);
+
+ for (port = 1; port < 65535; port++)
+ ports_nh_sv[port] = ~0;
+
+ for (i = 0; i < vec_len (ports); i++)
+ ports_nh_sv[ports[i]] = nh[i];
+
+ h = sparse_vec_header (ports_nh_sv);
+ vec_foreach (mb, h->is_member_bitmap)
+ *mb = (uword) ~0;
+
+ msum = 0;
+ vec_foreach (mc, h->member_counts)
+ {
+ *mc = msum;
+ msum += msum == 0 ? 63 : 64;
+ }
+
+ vec_free (ports);
+ vec_free (nh);
+
+ *ports_nh_svp = ports_nh_sv;
+}
+
+static clib_error_t *
+udp_enable_disable (vlib_main_t *vm, u8 is_en)
+{
+ udp_main_t *um = &udp_main;
+
+ /* Not ideal. The sparse vector used to map ports to next nodes assumes
+ * only a few ports are ever used. When udp transport is enabled this does
+ * not hold and, to make matters worse, ports are consumed in a random
+ * order.
+ *
+ * This can lead to a lot of slow updates to internal data structures
+ * which in turn can slow udp connection allocations until all ports are
+ * eventually consumed.
+ *
+ * Consequently, reallocate sparse vector, preallocate all ports and have
+ * them point to UDP_NO_NODE_SET. We could consider switching the sparse
+ * vector to a preallocated vector but that would increase memory
+ * consumption for vpp deployments that do not rely on host stack.
+ */
+
+ udp_realloc_ports_sv (&um->next_by_dst_port4);
+ udp_realloc_ports_sv (&um->next_by_dst_port6);
+
+ return 0;
+}
+
static const transport_proto_vft_t udp_proto = {
+ .enable = udp_enable_disable,
.start_listen = udp_session_bind,
.connect = udp_open_connection,
.stop_listen = udp_session_unbind,
@@ -515,7 +594,6 @@ static const transport_proto_vft_t udp_proto = {
.service_type = TRANSPORT_SERVICE_CL,
},
};
-/* *INDENT-ON* */
static clib_error_t *
udp_init (vlib_main_t * vm)