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/*
* Copyright (c) 2016 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.
*/
/*
*------------------------------------------------------------------
* trace_api.c - iOAM Trace related APIs to create
* and maintain profiles
*------------------------------------------------------------------
*/
#include <vnet/vnet.h>
#include <vnet/plugin/plugin.h>
#include <ioam/lib-trace/trace_util.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
#include <vlibsocket/api.h>
/* define message IDs */
#include <ioam/lib-trace/trace_msg_enum.h>
/* define message structures */
#define vl_typedefs
#include <ioam/lib-trace/trace_all_api_h.h>
#undef vl_typedefs
/* define generated endian-swappers */
#define vl_endianfun
#include <ioam/lib-trace/trace_all_api_h.h>
#undef vl_endianfun
/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include <ioam/lib-trace/trace_all_api_h.h>
#undef vl_printfun
/* Get the API version number */
#define vl_api_version(n,v) static u32 api_version=(v);
#include <ioam/lib-trace/trace_all_api_h.h>
#undef vl_api_version
/*
* A handy macro to set up a message reply.
* Assumes that the following variables are available:
* mp - pointer to request message
* rmp - pointer to reply message type
* rv - return value
*/
#define TRACE_REPLY_MACRO(t) \
do { \
unix_shared_memory_queue_t * q = \
vl_api_client_index_to_input_queue (mp->client_index); \
if (!q) \
return; \
\
rmp = vl_msg_api_alloc (sizeof (*rmp)); \
rmp->_vl_msg_id = ntohs((t)+sm->msg_id_base); \
rmp->context = mp->context; \
rmp->retval = ntohl(rv); \
\
vl_msg_api_send_shmem (q, (u8 *)&rmp); \
} while(0);
/* *INDENT-OFF* */
#define TRACE_REPLY_MACRO2(t, body) \
do { \
unix_shared_memory_queue_t * q; \
rv = vl_msg_api_pd_handler (mp, rv); \
q = vl_api_client_index_to_input_queue (mp->client_index); \
if (!q) \
return; \
\
rmp = vl_msg_api_alloc (sizeof (*rmp)); \
rmp->_vl_msg_id = ntohs((t)); \
rmp->context = mp->context; \
rmp->retval = ntohl(rv); \
do {body;} while (0); \
vl_msg_api_send_shmem (q, (u8 *)&rmp); \
} while(0);
/* *INDENT-ON* */
/* List of message types that this plugin understands */
#define foreach_trace_plugin_api_msg \
_(TRACE_PROFILE_ADD, trace_profile_add) \
_(TRACE_PROFILE_DEL, trace_profile_del) \
static void vl_api_trace_profile_add_t_handler
(vl_api_trace_profile_add_t * mp)
{
trace_main_t *sm = &trace_main;
int rv = 0;
vl_api_trace_profile_add_reply_t *rmp;
trace_profile *profile = NULL;
profile = trace_profile_find ();
if (profile)
{
rv =
trace_profile_create (profile, mp->trace_type, mp->num_elts,
mp->trace_tsp, ntohl (mp->node_id),
ntohl (mp->app_data));
if (rv != 0)
goto ERROROUT;
}
else
{
rv = -3;
}
ERROROUT:
TRACE_REPLY_MACRO (VL_API_TRACE_PROFILE_ADD_REPLY);
}
static void vl_api_trace_profile_del_t_handler
(vl_api_trace_profile_del_t * mp)
{
trace_main_t *sm = &trace_main;
int rv = 0;
vl_api_trace_profile_del_reply_t *rmp;
clear_trace_profiles ();
TRACE_REPLY_MACRO (VL_API_TRACE_PROFILE_DEL_REPLY);
}
/*
* This routine exists to convince the vlib plugin framework that
* we haven't accidentally copied a random .dll into the plugin directory.
*
* Also collects global variable pointers passed from the vpp engine
*/
clib_error_t *
vlib_plugin_register (vlib_main_t * vm, vnet_plugin_handoff_t * h,
int from_early_init)
{
trace_main_t *sm = &trace_main;
clib_error_t *error = 0;
sm->vlib_main = vm;
sm->vnet_main = h->vnet_main;
return error;
}
/* Set up the API message handling tables */
static clib_error_t *
trace_plugin_api_hookup (vlib_main_t * vm)
{
trace_main_t *sm = &trace_main;
#define _(N,n) \
vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base), \
#n, \
vl_api_##n##_t_handler, \
vl_noop_handler, \
vl_api_##n##_t_endian, \
vl_api_##n##_t_print, \
sizeof(vl_api_##n##_t), 1);
foreach_trace_plugin_api_msg;
#undef _
return 0;
}
#define vl_msg_name_crc_list
#include <ioam/lib-trace/trace_all_api_h.h>
#undef vl_msg_name_crc_list
static void
setup_message_id_table (trace_main_t * sm, api_main_t * am)
{
#define _(id,n,crc) \
vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + sm->msg_id_base);
foreach_vl_msg_name_crc_trace;
#undef _
}
static clib_error_t *
trace_init (vlib_main_t * vm)
{
trace_main_t *sm = &trace_main;
clib_error_t *error = 0;
u8 *name;
bzero (sm, sizeof (trace_main));
(void) trace_util_init ();
name = format (0, "ioam_trace_%08x%c", api_version, 0);
/* Ask for a correctly-sized block of API message decode slots */
sm->msg_id_base = vl_msg_api_get_msg_ids
((char *) name, VL_MSG_FIRST_AVAILABLE);
error = trace_plugin_api_hookup (vm);
/* Add our API messages to the global name_crc hash table */
setup_message_id_table (sm, &api_main);
vec_free (name);
return error;
}
VLIB_INIT_FUNCTION (trace_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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