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 VLIB_REGISTER_NODE (device_input_node) = {
  33   .function = device_input_fn,
  34   .name = "device-input",
  35   .runtime_data_bytes = sizeof (vnet_hw_if_rx_node_runtime_t),
  36   .type = VLIB_NODE_TYPE_INPUT,
  37   .state = VLIB_NODE_STATE_DISABLED,
  38   .n_next_nodes = VNET_DEVICE_INPUT_N_NEXT_NODES,
  39   .next_nodes = VNET_DEVICE_INPUT_NEXT_NODES,
  40 };
  41
  42 VNET_FEATURE_ARC_INIT (device_input, static) =
  43 {
  44   .arc_name  = "device-input",
  45   .start_nodes = VNET_FEATURES ("device-input"),
  46   .last_in_arc = "ethernet-input",
  47   .arc_index_ptr = &feature_main.device_input_feature_arc_index,
  48 };
  49
  50 VNET_FEATURE_INIT (l2_patch, static) = {
  51   .arc_name = "device-input",
  52   .node_name = "l2-patch",
  53   .runs_before = VNET_FEATURES ("ethernet-input"),
  54 };
  55
  56 VNET_FEATURE_INIT (worker_handoff, static) = {
  57   .arc_name = "device-input",
  58   .node_name = "worker-handoff",
  59   .runs_before = VNET_FEATURES ("ethernet-input"),
  60 };
  61
  62 VNET_FEATURE_INIT (span_input, static) = {
  63   .arc_name = "device-input",
  64   .node_name = "span-input",
  65   .runs_before = VNET_FEATURES ("ethernet-input"),
  66 };
  67
  68 VNET_FEATURE_INIT (p2p_ethernet_node, static) = {
  69   .arc_name = "device-input",
  70   .node_name = "p2p-ethernet-input",
  71   .runs_before = VNET_FEATURES ("ethernet-input"),
  72 };
  73
  74 VNET_FEATURE_INIT (ethernet_input, static) = {
  75   .arc_name = "device-input",
  76   .node_name = "ethernet-input",
  77   .runs_before = 0, /* not before any other features */
  78 };
  79
  80 static void
  81 input_rate_collector_fn (vlib_stats_collector_data_t *d)
  82 {
  83   vlib_stats_segment_t *sm = vlib_stats_get_segment ();
  84   vlib_stats_entry_t *e2 = sm->directory_vector + d->private_data;
  85   static u64 last_input_packets = 0;
  86   f64 dt, now;
  87
  88   now = vlib_time_now (vlib_get_main ());
  89   u64 input_packets = vnet_get_aggregate_rx_packets ();
  90
  91   dt = now - e2->value;
  92   d->entry->value = (f64) (input_packets - last_input_packets) / dt;
  93   last_input_packets = input_packets;
  94   e2->value = now;
  95 }
  96
  97 static clib_error_t *
  98 vnet_device_init (vlib_main_t * vm)
  99 {
 100   vnet_device_main_t *vdm = &vnet_device_main;
 101   vlib_thread_main_t *tm = vlib_get_thread_main ();
 102   vlib_thread_registration_t *tr;
 103   vlib_stats_collector_reg_t reg = {};
 104   uword *p;
 105
 106   vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
 107                         CLIB_CACHE_LINE_BYTES);
 108
 109   p = hash_get_mem (tm->thread_registrations_by_name, "workers");
 110   tr = p ? (vlib_thread_registration_t *) p[0] : 0;
 111   if (tr && tr->count > 0)
 112     {
 113       vdm->first_worker_thread_index = tr->first_index;
 114       vdm->next_worker_thread_index = tr->first_index;
 115       vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
 116     }
 117
 118   reg.private_data = vlib_stats_add_timestamp ("/sys/last_update");
 119   reg.entry_index = vlib_stats_add_gauge ("/sys/input_rate");
 120   reg.collect_fn = input_rate_collector_fn;
 121   vlib_stats_register_collector_fn (&reg);
 122
 123   return 0;
 124 }
 125
 126 VLIB_INIT_FUNCTION (vnet_device_init);
 127
 128 /*
 129  * fd.io coding-style-patch-verification: ON
 130  *
 131  * Local Variables:
 132  * eval: (c-set-style "gnu")
 133  * End:
 134  */