src/vnet/devices/devices.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <vnet/vnet.h>
  17 #include <vnet/devices/devices.h>
  18 #include <vnet/feature/feature.h>
  19 #include <vnet/ip/ip.h>
  20 #include <vnet/ethernet/ethernet.h>
  21 #include <vlib/stats/stats.h>
  22
  23 vnet_device_main_t vnet_device_main;
  24
  25 static uword
  26 device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
  27                  vlib_frame_t * frame)
  28 {
  29   return 0;
  30 }
  31
  32 /* *INDENT-OFF* */
  33 VLIB_REGISTER_NODE (device_input_node) = {
  34   .function = device_input_fn,
  35   .name = "device-input",
  36   .runtime_data_bytes = sizeof (vnet_hw_if_rx_node_runtime_t),
  37   .type = VLIB_NODE_TYPE_INPUT,
  38   .state = VLIB_NODE_STATE_DISABLED,
  39   .n_next_nodes = VNET_DEVICE_INPUT_N_NEXT_NODES,
  40   .next_nodes = VNET_DEVICE_INPUT_NEXT_NODES,
  41 };
  42
  43 VNET_FEATURE_ARC_INIT (device_input, static) =
  44 {
  45   .arc_name  = "device-input",
  46   .start_nodes = VNET_FEATURES ("device-input"),
  47   .last_in_arc = "ethernet-input",
  48   .arc_index_ptr = &feature_main.device_input_feature_arc_index,
  49 };
  50
  51 VNET_FEATURE_INIT (l2_patch, static) = {
  52   .arc_name = "device-input",
  53   .node_name = "l2-patch",
  54   .runs_before = VNET_FEATURES ("ethernet-input"),
  55 };
  56
  57 VNET_FEATURE_INIT (worker_handoff, static) = {
  58   .arc_name = "device-input",
  59   .node_name = "worker-handoff",
  60   .runs_before = VNET_FEATURES ("ethernet-input"),
  61 };
  62
  63 VNET_FEATURE_INIT (span_input, static) = {
  64   .arc_name = "device-input",
  65   .node_name = "span-input",
  66   .runs_before = VNET_FEATURES ("ethernet-input"),
  67 };
  68
  69 VNET_FEATURE_INIT (p2p_ethernet_node, static) = {
  70   .arc_name = "device-input",
  71   .node_name = "p2p-ethernet-input",
  72   .runs_before = VNET_FEATURES ("ethernet-input"),
  73 };
  74
  75 VNET_FEATURE_INIT (ethernet_input, static) = {
  76   .arc_name = "device-input",
  77   .node_name = "ethernet-input",
  78   .runs_before = 0, /* not before any other features */
  79 };
  80 /* *INDENT-ON* */
  81
  82 static void
  83 input_rate_collector_fn (vlib_stats_collector_data_t *d)
  84 {
  85   vlib_stats_segment_t *sm = vlib_stats_get_segment ();
  86   vlib_stats_entry_t *e2 = sm->directory_vector + d->private_data;
  87   static u64 last_input_packets = 0;
  88   f64 dt, now;
  89
  90   now = vlib_time_now (vlib_get_main ());
  91   u64 input_packets = vnet_get_aggregate_rx_packets ();
  92
  93   dt = now - e2->value;
  94   d->entry->value = (f64) (input_packets - last_input_packets) / dt;
  95   last_input_packets = input_packets;
  96   e2->value = now;
  97 }
  98
  99 static clib_error_t *
 100 vnet_device_init (vlib_main_t * vm)
 101 {
 102   vnet_device_main_t *vdm = &vnet_device_main;
 103   vlib_thread_main_t *tm = vlib_get_thread_main ();
 104   vlib_thread_registration_t *tr;
 105   vlib_stats_collector_reg_t reg = {};
 106   uword *p;
 107
 108   vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
 109                         CLIB_CACHE_LINE_BYTES);
 110
 111   p = hash_get_mem (tm->thread_registrations_by_name, "workers");
 112   tr = p ? (vlib_thread_registration_t *) p[0] : 0;
 113   if (tr && tr->count > 0)
 114     {
 115       vdm->first_worker_thread_index = tr->first_index;
 116       vdm->next_worker_thread_index = tr->first_index;
 117       vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
 118     }
 119
 120   reg.private_data = vlib_stats_add_timestamp ("/sys/last_update");
 121   reg.entry_index = vlib_stats_add_gauge ("/sys/input_rate");
 122   reg.collect_fn = input_rate_collector_fn;
 123   vlib_stats_register_collector_fn (&reg);
 124
 125   return 0;
 126 }
 127
 128 VLIB_INIT_FUNCTION (vnet_device_init);
 129
 130 /*
 131  * fd.io coding-style-patch-verification: ON
 132  *
 133  * Local Variables:
 134  * eval: (c-set-style "gnu")
 135  * End:
 136  */