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-rw-r--r--src/plugins/ioam/lib-trace/trace_api.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/src/plugins/ioam/lib-trace/trace_api.c b/src/plugins/ioam/lib-trace/trace_api.c
new file mode 100644
index 00000000000..7e0d708e155
--- /dev/null
+++ b/src/plugins/ioam/lib-trace/trace_api.c
@@ -0,0 +1,252 @@
+/*
+ * 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)+sm->msg_id_base); \
+ 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) \
+_(TRACE_PROFILE_SHOW_CONFIG, trace_profile_show_config)
+
+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);
+}
+
+static void vl_api_trace_profile_show_config_t_handler
+ (vl_api_trace_profile_show_config_t * mp)
+{
+ trace_main_t *sm = &trace_main;
+ vl_api_trace_profile_show_config_reply_t *rmp;
+ int rv = 0;
+ trace_profile *profile = trace_profile_find ();
+ if (profile->valid)
+ {
+ TRACE_REPLY_MACRO2 (VL_API_TRACE_PROFILE_SHOW_CONFIG_REPLY,
+ rmp->trace_type = profile->trace_type;
+ rmp->num_elts = profile->num_elts;
+ rmp->trace_tsp = profile->trace_tsp;
+ rmp->node_id = htonl (profile->node_id);
+ rmp->app_data = htonl (profile->app_data);
+ );
+ }
+ else
+ {
+ TRACE_REPLY_MACRO2 (VL_API_TRACE_PROFILE_SHOW_CONFIG_REPLY,
+ rmp->trace_type = 0;
+ rmp->num_elts = 0; rmp->trace_tsp = 0;
+ rmp->node_id = 0; rmp->app_data = 0;
+ );
+ }
+}
+
+/*
+ * 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:
+ */