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/*
* node.c - skeleton vpp engine plug-in dual-loop node skeleton
*
* Copyright (c) <current-year> <your-organization>
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
#include <handoffdemo/handoffdemo.h>
typedef struct
{
int current_thread;
} handoffdemo_trace_t;
/* packet trace format function */
static u8 *
format_handoffdemo_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
handoffdemo_trace_t *t = va_arg (*args, handoffdemo_trace_t *);
s = format (s, "HANDOFFDEMO: current thread %d", t->current_thread);
return s;
}
vlib_node_registration_t handoffdemo_node;
#define foreach_handoffdemo_error \
_(HANDED_OFF, "packets handed off processed") \
_(CONGESTION_DROP, "handoff queue congestion drops") \
_(COMPLETE, "completed packets")
typedef enum
{
#define _(sym,str) HANDOFFDEMO_ERROR_##sym,
foreach_handoffdemo_error
#undef _
HANDOFFDEMO_N_ERROR,
} handoffdemo_error_t;
static char *handoffdemo_error_strings[] = {
#define _(sym,string) string,
foreach_handoffdemo_error
#undef _
};
typedef enum
{
HANDOFFDEMO_NEXT_DROP,
HANDOFFDEMO_N_NEXT,
} handoffdemo_next_t;
always_inline uword
handoffdemo_inline (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame,
int which, int is_trace)
{
handoffdemo_main_t *hmp = &handoffdemo_main;
u32 n_left_from, *from;
u32 error0 = node->errors[HANDOFFDEMO_ERROR_COMPLETE];
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 thread_indices[VLIB_FRAME_SIZE];
u16 nexts[VLIB_FRAME_SIZE], *next;
u32 n_enq;
int i;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
vlib_get_buffers (vm, from, bufs, n_left_from);
next = nexts;
b = bufs;
/* First thread */
if (which == 1)
{
for (i = 0; i < frame->n_vectors; i++)
{
/* Pick a thread to handle this packet */
thread_indices[i] = 2;
if (is_trace && (b[0]->flags & VLIB_BUFFER_IS_TRACED))
{
handoffdemo_trace_t *t = vlib_add_trace (vm, node, b[0],
sizeof (*t));
t->current_thread = vm->thread_index;
}
b += 1;
next += 1;
n_left_from -= 1;
}
/* Enqueue buffers to threads */
n_enq = vlib_buffer_enqueue_to_thread (
vm, node, hmp->frame_queue_index, from, thread_indices,
frame->n_vectors, 1 /* drop on congestion */);
if (n_enq < frame->n_vectors)
vlib_node_increment_counter (vm, node->node_index,
HANDOFFDEMO_ERROR_CONGESTION_DROP,
frame->n_vectors - n_enq);
vlib_node_increment_counter (vm, node->node_index,
HANDOFFDEMO_ERROR_HANDED_OFF, n_enq);
return frame->n_vectors;
}
else /* Second thread */
{
u32 *from;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
vlib_get_buffers (vm, from, bufs, n_left_from);
next = nexts;
b = bufs;
while (n_left_from > 0)
{
if (is_trace && (b[0]->flags & VLIB_BUFFER_IS_TRACED))
{
handoffdemo_trace_t *t = vlib_add_trace (vm, node, b[0],
sizeof (*t));
t->current_thread = vm->thread_index;
}
next[0] = HANDOFFDEMO_NEXT_DROP;
b[0]->error = error0;
next++;
b++;
n_left_from--;
}
vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
frame->n_vectors);
}
return frame->n_vectors;
}
static uword
handoffdemo_node_1_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
return handoffdemo_inline (vm, node, frame, 1 /* which */ ,
1 /* is_trace */ );
else
return handoffdemo_inline (vm, node, frame, 1 /* which */ ,
0 /* is_trace */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (handoffdemo_node_1) =
{
.name = "handoffdemo-1",
.function = handoffdemo_node_1_fn,
.vector_size = sizeof (u32),
.format_trace = format_handoffdemo_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(handoffdemo_error_strings),
.error_strings = handoffdemo_error_strings,
.n_next_nodes = HANDOFFDEMO_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
[HANDOFFDEMO_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
uword
handoffdemo_node_2_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
return handoffdemo_inline (vm, node, frame, 2 /* which */ ,
1 /* is_trace */ );
else
return handoffdemo_inline (vm, node, frame, 2 /* which */ ,
0 /* is_trace */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (handoffdemo_node_2) =
{
.name = "handoffdemo-2",
.function = handoffdemo_node_2_fn,
.vector_size = sizeof (u32),
.format_trace = format_handoffdemo_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(handoffdemo_error_strings),
.error_strings = handoffdemo_error_strings,
.n_next_nodes = HANDOFFDEMO_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
[HANDOFFDEMO_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
static clib_error_t *
handoffdemo_node_init (vlib_main_t * vm)
{
handoffdemo_main_t *hmp = &handoffdemo_main;
hmp->frame_queue_index = vlib_frame_queue_main_init
(handoffdemo_node_2.index, 16);
return 0;
}
VLIB_INIT_FUNCTION (handoffdemo_node_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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