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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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.
*/
/** \file
* Buffer trace trajectory utilities
*/
#include <vnet/vnet.h>
/**
* Dump a trajectory trace, reasonably easy to call from gdb
*/
void
vnet_dump_trajectory_trace (vlib_main_t * vm, u32 bi)
{
#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
vlib_node_main_t *vnm = &vm->node_main;
vlib_buffer_t *b;
u16 *trace;
u8 i;
b = vlib_get_buffer (vm, bi);
trace = vnet_buffer2 (b)->trajectory_trace;
fformat (stderr, "Context trace for bi %d b 0x%llx, visited %d\n",
bi, b, vec_len (trace));
for (i = 0; i < vec_len (trace); i++)
{
u32 node_index;
node_index = trace[i];
if (node_index >= vec_len (vnm->nodes))
{
fformat (stderr, "Skip bogus node index %d\n", node_index);
continue;
}
fformat (stderr, "%v (%d)\n", vnm->nodes[node_index]->name, node_index);
}
#else
fformat (stderr, "in vlib/buffers.h, "
"#define VLIB_BUFFER_TRACE_TRAJECTORY 1\n");
#endif
}
#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
void
init_trajectory_trace (vlib_buffer_t * b)
{
if (!clib_mem_is_vec (vnet_buffer2 (b)->trajectory_trace))
{
vnet_buffer2 (b)->trajectory_trace = 0;
vec_validate (vnet_buffer2 (b)->trajectory_trace, 7);
}
_vec_len (vnet_buffer2 (b)->trajectory_trace) = 0;
}
void
add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
{
vec_add1 (vnet_buffer2 (b)->trajectory_trace, (u16) node_index);
}
static clib_error_t *
trajectory_trace_init (vlib_main_t * vm)
{
vlib_buffer_trace_trajectory_cb = add_trajectory_trace;
vlib_buffer_trace_trajectory_init_cb = init_trajectory_trace;
return 0;
}
VLIB_INIT_FUNCTION (trajectory_trace_init);
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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