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authorEd Warnicke <eaw@cisco.com>2015-12-08 15:45:58 -0700
committerEd Warnicke <eaw@cisco.com>2015-12-08 15:47:27 -0700
commitcb9cadad578297ffd78fa8a33670bdf1ab669e7e (patch)
tree6ac2be912482cc7849a26f0ab845561c3d7f4e26 /vlib-api/vlibapi/api_shared.c
parentfb0815d4ae4bb0fe27bd9313f34b45c8593b907e (diff)
Initial commit of vpp code.v1.0.0
Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17 Signed-off-by: Ed Warnicke <eaw@cisco.com>
Diffstat (limited to 'vlib-api/vlibapi/api_shared.c')
-rw-r--r--vlib-api/vlibapi/api_shared.c1139
1 files changed, 1139 insertions, 0 deletions
diff --git a/vlib-api/vlibapi/api_shared.c b/vlib-api/vlibapi/api_shared.c
new file mode 100644
index 00000000000..8b8698b175d
--- /dev/null
+++ b/vlib-api/vlibapi/api_shared.c
@@ -0,0 +1,1139 @@
+/*
+ *------------------------------------------------------------------
+ * api_shared.c - API message handling, common code for both clients
+ * and the vlib process itself.
+ *
+ *
+ * Copyright (c) 2009 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.
+ *------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <vppinfra/format.h>
+#include <vppinfra/byte_order.h>
+#include <vppinfra/error.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+#include <vppinfra/elog.h>
+
+api_main_t api_main;
+
+void vl_msg_api_barrier_sync(void) __attribute__((weak));
+void vl_msg_api_barrier_sync(void) { }
+
+void vl_msg_api_barrier_release(void) __attribute__((weak));
+void vl_msg_api_barrier_release(void) { }
+
+void vl_msg_api_increment_missing_client_counter(void)
+{
+ api_main_t * am = &api_main;
+ am->missing_clients++;
+}
+
+typedef enum {
+ DUMP,
+ CUSTOM_DUMP,
+ REPLAY,
+ INITIALIZERS,
+} vl_api_replay_t;
+
+int vl_msg_api_rx_trace_enabled(api_main_t *am)
+{
+ return (am->rx_trace && am->rx_trace->enabled);
+}
+
+int vl_msg_api_tx_trace_enabled(api_main_t *am)
+{
+ return (am->tx_trace && am->tx_trace->enabled);
+}
+
+/*
+ * vl_msg_api_trace
+ */
+void vl_msg_api_trace(api_main_t *am, vl_api_trace_t *tp, void *msg)
+{
+ u8 **this_trace;
+ u8 **old_trace;
+ u8 *msg_copy;
+ trace_cfg_t *cfgp;
+ u16 msg_id = ntohs(*((u16 *)msg));
+
+ cfgp = am->api_trace_cfg + msg_id;
+
+ if (!cfgp || !cfgp->trace_enable)
+ return;
+
+ msg_copy = 0;
+
+ if (tp->nitems == 0) {
+ clib_warning ("tp->nitems is 0");
+ return;
+ }
+
+ if (vec_len(tp->traces) < tp->nitems) {
+ vec_add1(tp->traces, 0);
+ this_trace = tp->traces + vec_len(tp->traces) - 1;
+ } else {
+ tp->wrapped = 1;
+ old_trace = tp->traces + tp->curindex++;
+ if (tp->curindex == tp->nitems)
+ tp->curindex = 0;
+ vec_free(*old_trace);
+ this_trace = old_trace;
+ }
+
+ vec_validate(msg_copy, cfgp->size - 1);
+ memcpy(msg_copy, msg, cfgp->size);
+ *this_trace = msg_copy;
+}
+
+int vl_msg_api_trace_onoff(api_main_t *am, vl_api_trace_which_t which,
+ int onoff)
+{
+ vl_api_trace_t *tp;
+ int rv;
+
+ switch(which)
+ {
+ case VL_API_TRACE_TX:
+ tp = am->tx_trace;
+ if (tp == 0) {
+ vl_msg_api_trace_configure (am, which, 1024);
+ tp = am->tx_trace;
+ }
+ break;
+
+ case VL_API_TRACE_RX:
+ tp = am->rx_trace;
+ if (tp == 0) {
+ vl_msg_api_trace_configure (am, which, 1024);
+ tp = am->rx_trace;
+ }
+ break;
+
+ default:
+ /* duh? */
+ return -1;
+ }
+
+ /* Configured? */
+ if (tp == 0 || tp->nitems == 0)
+ return -1;
+
+ rv = tp->enabled;
+ tp->enabled = onoff;
+
+ return rv;
+}
+
+int vl_msg_api_trace_free(api_main_t *am, vl_api_trace_which_t which)
+{
+ vl_api_trace_t *tp;
+ int i;
+
+ switch(which)
+ {
+ case VL_API_TRACE_TX:
+ tp = am->tx_trace;
+ break;
+
+ case VL_API_TRACE_RX:
+ tp = am->rx_trace;
+ break;
+
+ default:
+ /* duh? */
+ return -1;
+ }
+
+ /* Configured? */
+ if (!tp || tp->nitems == 0)
+ return -1;
+
+ tp->curindex = 0;
+ tp->wrapped = 0;
+
+ for (i = 0; i < vec_len(tp->traces); i++) {
+ vec_free(tp->traces[i]);
+ }
+ vec_free(tp->traces);
+
+ return 0;
+}
+
+int vl_msg_api_trace_save(api_main_t *am,
+ vl_api_trace_which_t which, FILE *fp)
+{
+ vl_api_trace_t *tp;
+ vl_api_trace_file_header_t fh;
+ int i;
+ u8 *msg;
+
+ switch(which)
+ {
+ case VL_API_TRACE_TX:
+ tp = am->tx_trace;
+ break;
+
+ case VL_API_TRACE_RX:
+ tp = am->rx_trace;
+ break;
+
+ default:
+ /* duh? */
+ return -1;
+ }
+
+ /* Configured, data present? */
+ if (tp == 0 || tp->nitems == 0 || vec_len(tp->traces) == 0)
+ return -1;
+
+ /* "Dare to be stupid" check */
+ if (fp == 0) {
+ return -2;
+ }
+
+ /* Write the file header */
+ fh.nitems = vec_len(tp->traces);
+ fh.endian = tp->endian;
+ fh.wrapped = tp->wrapped;
+
+ if (fwrite(&fh, sizeof(fh), 1, fp) != 1) {
+ return (-10);
+ }
+
+ /* No-wrap case */
+ if (tp->wrapped == 0) {
+ /*
+ * Note: vec_len return 0 when fed a NULL pointer.
+ * Unfortunately, the static analysis tool doesn't
+ * figure it out, hence the suppressed warnings.
+ * What a great use of my time.
+ */
+ for (i = 0; i < vec_len(tp->traces); i++) {
+ /*sa_ignore NO_NULL_CHK*/
+ msg = tp->traces[i];
+ /*
+ * This retarded check required to pass
+ * [sic] SA-checking.
+ */
+ if (!msg)
+ continue;
+ if (fwrite(msg, 1, vec_len(msg), fp) != vec_len(msg)) {
+ return (-11);
+ }
+ }
+ } else {
+ /* Wrap case: write oldest -> end of buffer */
+ for (i = tp->curindex; i < vec_len(tp->traces); i++) {
+ msg = tp->traces[i];
+ /*
+ * This retarded check required to pass
+ * [sic] SA-checking
+ */
+ if (!msg)
+ continue;
+
+ if (fwrite(msg, 1, vec_len(msg), fp) != vec_len(msg)) {
+ return (-12);
+ }
+ }
+ /* write beginning of buffer -> oldest-1 */
+ for (i = 0; i < tp->curindex; i++) {
+ /*sa_ignore NO_NULL_CHK*/
+ msg = tp->traces[i];
+ /*
+ * This retarded check required to pass
+ * [sic] SA-checking
+ */
+ if (!msg)
+ continue;
+
+ if (fwrite(msg, 1, vec_len(msg), fp) != vec_len(msg)) {
+ return (-13);
+ }
+ }
+ }
+ return 0;
+}
+
+int vl_msg_api_trace_configure(api_main_t *am, vl_api_trace_which_t which,
+ u32 nitems)
+{
+ vl_api_trace_t *tp;
+ int was_on = 0;
+
+ switch(which)
+ {
+ case VL_API_TRACE_TX:
+ tp = am->tx_trace;
+ if (tp == 0) {
+ vec_validate(am->tx_trace, 0);
+ tp = am->tx_trace;
+ }
+ break;
+
+ case VL_API_TRACE_RX:
+ tp = am->rx_trace;
+ if (tp == 0) {
+ vec_validate(am->rx_trace, 0);
+ tp = am->rx_trace;
+ }
+
+ break;
+
+ default:
+ return -1;
+
+ }
+
+ if (tp->enabled) {
+ was_on = vl_msg_api_trace_onoff(am, which, 0);
+ }
+ if (tp->traces) {
+ vl_msg_api_trace_free(am, which);
+ }
+
+ memset(tp, 0, sizeof(*tp));
+
+ if (clib_arch_is_big_endian) {
+ tp->endian = VL_API_BIG_ENDIAN;
+ } else {
+ tp->endian = VL_API_LITTLE_ENDIAN;
+ }
+
+ tp->nitems = nitems;
+ if (was_on) {
+ (void)vl_msg_api_trace_onoff(am, which, was_on);
+ }
+ return 0;
+}
+
+always_inline void msg_handler_internal (api_main_t *am,
+ void *the_msg,
+ int trace_it,
+ int do_it,
+ int free_it)
+{
+ u16 id = ntohs(*((u16 *)the_msg));
+ u8 *(*print_fp)(void *, void *);
+
+ if (id < vec_len(am->msg_handlers) &&
+ am->msg_handlers[id]) {
+ if (trace_it)
+ vl_msg_api_trace(am, am->rx_trace, the_msg);
+
+ if (am->msg_print_flag) {
+ fformat (stdout, "[%d]: %s\n", id,
+ am->msg_names[id]);
+ print_fp = (void *)am->msg_print_handlers[id];
+ if (print_fp == 0) {
+ fformat(stdout, " [no registered print fn]\n");
+ } else {
+ (*print_fp)(the_msg, stdout);
+ }
+ }
+
+ if (do_it) {
+ if (!am->is_mp_safe[id])
+ vl_msg_api_barrier_sync();
+ (*am->msg_handlers[id])(the_msg);
+ if (!am->is_mp_safe[id])
+ vl_msg_api_barrier_release();
+ }
+ } else {
+ clib_warning("no handler for msg id %d", id);
+ }
+
+ if (free_it)
+ vl_msg_api_free(the_msg);
+}
+
+/* set to 1 if you want before/after message handler event logging */
+#define ELOG_API_MESSAGE_HANDLERS 0
+
+#if ELOG_API_MESSAGE_HANDLERS > 0
+static u32 elog_id_for_msg_name (vlib_main_t * vm, char *msg_name)
+{
+ uword * p, r;
+ static uword * h;
+ u8 *name_copy;
+
+ if (! h)
+ h = hash_create_string (0, sizeof (uword));
+
+ p = hash_get_mem (h, msg_name);
+ if (p)
+ return p[0];
+ r = elog_string (&vm->elog_main, "%s", msg_name);
+
+ name_copy = format (0, "%s%c", msg_name, 0);
+
+ hash_set_mem (h, name_copy, r);
+
+ return r;
+}
+#endif
+
+/* This is only to be called from a vlib/vnet app */
+void vl_msg_api_handler_with_vm_node (api_main_t *am,
+ void *the_msg, vlib_main_t *vm,
+ vlib_node_runtime_t *node)
+{
+ u16 id = ntohs(*((u16 *)the_msg));
+ u8 *(*handler)(void *, void *, void *);
+
+#if ELOG_API_MESSAGE_HANDLERS > 0
+ {
+ ELOG_TYPE_DECLARE (e) = {
+ .format = "api-msg: %s",
+ .format_args = "T4",
+ };
+ struct { u32 c; } * ed;
+ ed = ELOG_DATA (&vm->elog_main, e);
+ if (id < vec_len (am->msg_names))
+ ed->c = elog_id_for_msg_name (vm, am->msg_names[id]);
+ else
+ ed->c = elog_id_for_msg_name (vm, "BOGUS");
+ }
+#endif
+
+ if (id < vec_len(am->msg_handlers) &&
+ am->msg_handlers[id]) {
+ handler = (void *)am->msg_handlers[id];
+
+ if (am->rx_trace && am->rx_trace->enabled)
+ vl_msg_api_trace(am, am->rx_trace, the_msg);
+
+ if (!am->is_mp_safe[id])
+ vl_msg_api_barrier_sync();
+ (*handler)(the_msg, vm, node);
+ if (!am->is_mp_safe[id])
+ vl_msg_api_barrier_release();
+ } else {
+ clib_warning("no hander for msg id %d", id);
+ }
+ /*
+ * Special-case, so we can e.g. bounce messages off the vnet
+ * main thread without copying them...
+ */
+ if (!(am->message_bounce[id]))
+ vl_msg_api_free(the_msg);
+
+#if ELOG_API_MESSAGE_HANDLERS > 0
+ {
+ ELOG_TYPE_DECLARE (e) = {
+ .format = "api-msg-done: %s",
+ .format_args = "T4",
+ };
+ struct { u32 c; } * ed;
+ ed = ELOG_DATA (&vm->elog_main, e);
+ if (id < vec_len (am->msg_names))
+ ed->c = elog_id_for_msg_name (vm, am->msg_names[id]);
+ else
+ ed->c = elog_id_for_msg_name (vm, "BOGUS");
+ }
+#endif
+}
+
+void vl_msg_api_handler (void *the_msg)
+{
+ api_main_t *am = &api_main;
+
+ msg_handler_internal (am, the_msg,
+ (am->rx_trace
+ && am->rx_trace->enabled) /* trace_it */,
+ 1 /* do_it */, 1 /* free_it */);
+}
+
+void vl_msg_api_handler_no_free (void *the_msg)
+{
+ api_main_t *am = &api_main;
+ msg_handler_internal (am, the_msg,
+ (am->rx_trace
+ && am->rx_trace->enabled) /* trace_it */,
+ 1 /* do_it */, 0 /* free_it */);
+}
+
+void vl_msg_api_handler_no_trace_no_free (void *the_msg)
+{
+ api_main_t *am = &api_main;
+ msg_handler_internal (am, the_msg, 0/* trace_it */, 1 /* do_it */,
+ 0 /* free_it */);
+}
+
+/*
+ * Add a trace record to the API message trace buffer, if
+ * API message tracing is enabled. Handy for adding sufficient
+ * data to the trace to reproduce autonomous state, as opposed to
+ * state downloaded via control-plane API messages. Example: the NAT
+ * application creates database entries based on packet traffic, not
+ * control-plane messages.
+ *
+ */
+void vl_msg_api_trace_only (void *the_msg)
+{
+ api_main_t *am = &api_main;
+
+ msg_handler_internal (am, the_msg,
+ (am->rx_trace
+ && am->rx_trace->enabled) /* trace_it */,
+ 0 /* do_it */, 0 /* free_it */);
+}
+
+void vl_msg_api_cleanup_handler (void *the_msg)
+{
+ api_main_t *am = &api_main;
+ u16 id = ntohs(*((u16 *)the_msg));
+
+ if (PREDICT_FALSE(id >= vec_len(am->msg_cleanup_handlers))) {
+ clib_warning ("_vl_msg_id too large: %d\n", id);
+ return;
+ }
+ if (am->msg_cleanup_handlers[id])
+ (*am->msg_cleanup_handlers[id])(the_msg);
+
+ vl_msg_api_free(the_msg);
+}
+
+/*
+ * vl_msg_api_replay_handler
+ */
+void vl_msg_api_replay_handler(void *the_msg)
+{
+ api_main_t *am = &api_main;
+
+ u16 id = ntohs(*((u16 *)the_msg));
+
+ if (PREDICT_FALSE(id >= vec_len(am->msg_handlers))) {
+ clib_warning ("_vl_msg_id too large: %d\n", id);
+ return;
+ }
+ /* do NOT trace the message... */
+ if (am->msg_handlers[id])
+ (*am->msg_handlers[id])(the_msg);
+ /* do NOT free the message buffer... */
+}
+/*
+ * vl_msg_api_socket_handler
+ */
+void vl_msg_api_socket_handler(void *the_msg)
+{
+ api_main_t *am = &api_main;
+
+ msg_handler_internal (am, the_msg,
+ (am->rx_trace
+ && am->rx_trace->enabled) /* trace_it */,
+ 1 /* do_it */, 0 /* free_it */);
+}
+
+#define foreach_msg_api_vector \
+_(msg_names) \
+_(msg_handlers) \
+_(msg_cleanup_handlers) \
+_(msg_endian_handlers) \
+_(msg_print_handlers) \
+_(api_trace_cfg) \
+_(message_bounce) \
+_(is_mp_safe)
+
+void vl_msg_api_config (vl_msg_api_msg_config_t *c)
+{
+ api_main_t *am = &api_main;
+
+ ASSERT(c->id > 0);
+
+#define _(a) vec_validate (am->a, c->id);
+ foreach_msg_api_vector;
+#undef _
+
+ am->msg_names[c->id] = c->name;
+ am->msg_handlers[c->id] = c->handler;
+ am->msg_cleanup_handlers[c->id] = c->cleanup;
+ am->msg_endian_handlers[c->id] = c->endian;
+ am->msg_print_handlers[c->id] = c->print;
+ am->message_bounce[c->id] = c->message_bounce;
+ am->is_mp_safe[c->id] = c->is_mp_safe;
+
+ am->api_trace_cfg[c->id].size = c->size;
+ am->api_trace_cfg[c->id].trace_enable = c->traced;
+ am->api_trace_cfg[c->id].replay_enable = c->replay;
+}
+
+/*
+ * vl_msg_api_set_handlers
+ * preserve the old API for a while
+ */
+void vl_msg_api_set_handlers(int id, char *name, void *handler, void *cleanup,
+ void *endian, void *print, int size, int traced)
+{
+ vl_msg_api_msg_config_t cfg;
+ vl_msg_api_msg_config_t *c = &cfg;
+
+ c->id = id;
+ c->name = name;
+ c->handler = handler;
+ c->cleanup = cleanup;
+ c->endian = endian;
+ c->print = print;
+ c->size = size;
+ c->traced = traced;
+ c->replay = 1;
+ c->message_bounce = 0;
+ c->is_mp_safe = 0;
+ vl_msg_api_config (c);
+}
+
+void vl_msg_api_set_cleanup_handler(int msg_id, void *fp)
+{
+ api_main_t *am = &api_main;
+ ASSERT(msg_id > 0);
+
+ vec_validate(am->msg_cleanup_handlers, msg_id);
+ am->msg_cleanup_handlers[msg_id] = fp;
+}
+
+void vl_msg_api_queue_handler(unix_shared_memory_queue_t *q)
+{
+ uword msg;
+
+ while (!unix_shared_memory_queue_sub(q, (u8 *)&msg, 0))
+ vl_msg_api_handler((void *)msg);
+}
+
+vl_api_trace_t *vl_msg_api_trace_get(api_main_t *am, vl_api_trace_which_t which)
+{
+ switch(which)
+ {
+ case VL_API_TRACE_RX:
+ return am->rx_trace;
+ case VL_API_TRACE_TX:
+ return am->tx_trace;
+ default:
+ return 0;
+ }
+}
+
+void vl_noop_handler (void *mp) { }
+
+clib_error_t *
+vl_api_init (vlib_main_t *vm)
+{
+ static u8 once;
+ api_main_t *am = &api_main;
+
+ if (once)
+ return 0;
+
+ once = 1;
+
+ am->region_name = "/unset";
+
+ return (0);
+}
+
+void vl_msg_api_custom_dump_configure (api_main_t *am) __attribute__((weak));
+void vl_msg_api_custom_dump_configure (api_main_t *am) { }
+
+VLIB_INIT_FUNCTION (vl_api_init);
+
+static void vl_msg_api_process_file (vlib_main_t *vm, u8 *filename,
+ u32 first_index, u32 last_index,
+ vl_api_replay_t which)
+{
+ vl_api_trace_file_header_t * hp;
+ int i, fd;
+ struct stat statb;
+ size_t file_size;
+ u8 *msg;
+ u8 endian_swap_needed = 0;
+ api_main_t * am = &api_main;
+ static u8 *tmpbuf;
+ u32 nitems;
+ void **saved_print_handlers = 0;
+
+ fd = open ((char *) filename, O_RDONLY);
+
+ if (fd < 0) {
+ vlib_cli_output (vm, "Couldn't open %s\n", filename);
+ return;
+ }
+
+ if (fstat(fd, &statb) < 0) {
+ vlib_cli_output (vm, "Couldn't stat %s\n", filename);
+ return;
+ }
+
+ if (! (statb.st_mode & S_IFREG) || (statb.st_size < sizeof (*hp))) {
+ vlib_cli_output (vm, "File not plausible: %s\n", filename);
+ return;
+ }
+
+ file_size = statb.st_size;
+ file_size = (file_size + 4095) & ~(4096);
+
+ hp = mmap (0, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
+
+ if (hp == (vl_api_trace_file_header_t *)MAP_FAILED) {
+ vlib_cli_output (vm, "mmap failed: %s\n", filename);
+ close(fd);
+ return;
+ }
+ close(fd);
+
+ if ((clib_arch_is_little_endian && hp->endian == VL_API_BIG_ENDIAN)
+ || (clib_arch_is_big_endian && hp->endian == VL_API_LITTLE_ENDIAN))
+ endian_swap_needed = 1;
+
+ if (endian_swap_needed)
+ nitems = ntohl(hp->nitems);
+ else
+ nitems = hp->nitems;
+
+ if (last_index == (u32) ~0) {
+ last_index = nitems - 1;
+ }
+
+ if (first_index >= nitems || last_index >= nitems) {
+ vlib_cli_output (vm, "Range (%d, %d) outside file range (0, %d)\n",
+ first_index, last_index, nitems-1);
+ return;
+ }
+ if (hp->wrapped)
+ vlib_cli_output (vm,
+ "Note: wrapped/incomplete trace, results may vary\n");
+
+ if (which == CUSTOM_DUMP) {
+ saved_print_handlers = (void **) vec_dup (am->msg_print_handlers);
+ vl_msg_api_custom_dump_configure (am);
+ }
+
+
+ msg = (u8 *)(hp+1);
+
+ for (i = 0; i < first_index; i++) {
+ trace_cfg_t *cfgp;
+ int size;
+ u16 msg_id;
+
+ if (clib_arch_is_little_endian)
+ msg_id = ntohs(*((u16 *)msg));
+ else
+ msg_id = *((u16 *)msg);
+
+ cfgp = am->api_trace_cfg + msg_id;
+ if (!cfgp) {
+ vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
+ return;
+ }
+ size = cfgp->size;
+ msg += size;
+ }
+
+ for (; i <= last_index; i++) {
+ trace_cfg_t *cfgp;
+ u16 *msg_idp;
+ u16 msg_id;
+ int size;
+
+ if (which == DUMP)
+ vlib_cli_output (vm, "---------- trace %d -----------\n", i);
+
+ if (clib_arch_is_little_endian)
+ msg_id = ntohs(*((u16 *)msg));
+ else
+ msg_id = *((u16 *)msg);
+
+ cfgp = am->api_trace_cfg + msg_id;
+ if (!cfgp) {
+ vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
+ return;
+ }
+ size = cfgp->size;
+
+ /* Copy the buffer (from the read-only mmap'ed file) */
+ vec_validate (tmpbuf, size-1 + sizeof(uword));
+ memcpy (tmpbuf+sizeof(uword), msg, size);
+ memset (tmpbuf, 0xf, sizeof(uword));
+
+ /*
+ * Endian swap if needed. All msg data is supposed to be
+ * in network byte order. All msg handlers are supposed to
+ * know that. The generic message dumpers don't know that.
+ * One could fix apigen, I suppose.
+ */
+ if ((which == DUMP && clib_arch_is_little_endian)
+ || endian_swap_needed) {
+ void (*endian_fp)(void *);
+ if (msg_id >= vec_len (am->msg_endian_handlers)
+ || (am->msg_endian_handlers[msg_id] == 0)) {
+ vlib_cli_output (vm, "Ugh: msg id %d no endian swap\n", msg_id);
+ return;
+ }
+ endian_fp = am->msg_endian_handlers[msg_id];
+ (*endian_fp)(tmpbuf+sizeof(uword));
+ }
+
+ /* msg_id always in network byte order */
+ if (clib_arch_is_little_endian) {
+ msg_idp = (u16 *)(tmpbuf+sizeof(uword));
+ *msg_idp = msg_id;
+ }
+
+ switch (which) {
+ case CUSTOM_DUMP:
+ case DUMP:
+ if (msg_id < vec_len(am->msg_print_handlers) &&
+ am->msg_print_handlers [msg_id]) {
+ u8 *(*print_fp)(void *, void *);
+
+ print_fp = (void *)am->msg_print_handlers[msg_id];
+ (*print_fp)(tmpbuf+sizeof(uword), vm);
+ } else {
+ vlib_cli_output (vm, "Skipping msg id %d: no print fcn\n",
+ msg_id);
+ break;
+ }
+ break;
+
+ case INITIALIZERS:
+ if (msg_id < vec_len(am->msg_print_handlers) &&
+ am->msg_print_handlers [msg_id]) {
+ u8 * s;
+ int j;
+ u8 *(*print_fp)(void *, void *);
+
+ print_fp = (void *)am->msg_print_handlers[msg_id];
+
+ vlib_cli_output (vm, "/*");
+
+ (*print_fp)(tmpbuf+sizeof(uword), vm);
+ vlib_cli_output (vm, "*/\n");
+
+ s = format (0, "static u8 * vl_api_%s_%d[%d] = {",
+ am->msg_names[msg_id], i,
+ am->api_trace_cfg[msg_id].size);
+
+ for (j = 0; j < am->api_trace_cfg[msg_id].size; j++) {
+ if ((j & 7) == 0)
+ s = format (s, "\n ");
+ s = format (s, "0x%02x,", tmpbuf[sizeof(uword)+j]);
+ }
+ s = format (s, "\n};\n%c", 0);
+ vlib_cli_output (vm, (char *)s);
+ vec_free(s);
+ }
+ break;
+
+ case REPLAY:
+ if (msg_id < vec_len(am->msg_print_handlers) &&
+ am->msg_print_handlers [msg_id] && cfgp->replay_enable) {
+ void (*handler)(void *);
+
+ handler = (void *)am->msg_handlers[msg_id];
+
+ if (!am->is_mp_safe[msg_id])
+ vl_msg_api_barrier_sync();
+ (*handler)(tmpbuf+sizeof(uword));
+ if (!am->is_mp_safe[msg_id])
+ vl_msg_api_barrier_release();
+ } else {
+ if (cfgp->replay_enable)
+ vlib_cli_output (vm, "Skipping msg id %d: no handler\n",
+ msg_id);
+ break;
+ }
+ break;
+ }
+
+ _vec_len(tmpbuf) = 0;
+ msg += size;
+ }
+
+ if (saved_print_handlers) {
+ memcpy (am->msg_print_handlers, saved_print_handlers,
+ vec_len(am->msg_print_handlers) * sizeof (void *));
+ vec_free (saved_print_handlers);
+ }
+
+ munmap (hp, file_size);
+}
+
+u8 * format_vl_msg_api_trace_status (u8 * s, va_list * args)
+{
+ api_main_t * am = va_arg (*args, api_main_t *);
+ vl_api_trace_which_t which = va_arg (*args, vl_api_trace_which_t);
+ vl_api_trace_t *tp;
+ char *trace_name;
+
+ switch(which)
+ {
+ case VL_API_TRACE_TX:
+ tp = am->tx_trace;
+ trace_name = "TX trace";
+ break;
+
+ case VL_API_TRACE_RX:
+ tp = am->rx_trace;
+ trace_name = "RX trace";
+ break;
+
+ default:
+ abort();
+ }
+
+ if (tp == 0) {
+ s = format (s, "%s: not yet configured.\n", trace_name);
+ return s;
+ }
+
+ s = format (s, "%s: used %d of %d items, %s enabled, %s wrapped\n",
+ trace_name, vec_len (tp->traces), tp->nitems,
+ tp->enabled ? "is" : "is not",
+ tp->wrapped ? "has" : "has not");
+ return s;
+}
+
+static u8 post_mortem_dump_enabled;
+
+static clib_error_t *
+api_trace_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u32 nitems = 256<<10;
+ api_main_t * am = &api_main;
+ vl_api_trace_which_t which = VL_API_TRACE_RX;
+ u8 *filename;
+ u32 first = 0;
+ u32 last = (u32)~0;
+ FILE *fp;
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (input, "on") || unformat (input, "enable")) {
+ if (unformat (input, "nitems %d", &nitems))
+ ;
+ vl_msg_api_trace_configure (am, which, nitems);
+ vl_msg_api_trace_onoff (am, which, 1 /* on */);
+ } else if (unformat (input, "off")) {
+ vl_msg_api_trace_onoff (am, which, 0);
+ } else if (unformat (input, "save %s", &filename)) {
+ u8 * chroot_filename;
+ if (strstr((char *)filename, "..")
+ || index((char *)filename, '/'))
+ {
+ vlib_cli_output (vm, "illegal characters in filename '%s'",
+ filename);
+ return 0;
+ }
+
+ chroot_filename = format (0, "/tmp/%s%c", filename, 0);
+
+ vec_free(filename);
+
+ fp = fopen ((char *)chroot_filename, "w");
+ if (fp == NULL) {
+ vlib_cli_output (vm, "Couldn't create %s\n", chroot_filename);
+ return 0;
+ }
+ rv = vl_msg_api_trace_save (am, which, fp);
+ fclose (fp);
+ if (rv < 0)
+ vlib_cli_output (vm, "ERROR: %d", rv);
+ else
+ vlib_cli_output (vm, "API trace saved to %s\n",
+ chroot_filename);
+ vec_free (chroot_filename);
+ } else if (unformat (input, "dump %s", &filename)) {
+ vl_msg_api_process_file (vm, filename, first, last, DUMP);
+ } else if (unformat (input, "custom-dump %s", &filename)) {
+ vl_msg_api_process_file (vm, filename, first, last, CUSTOM_DUMP);
+ } else if (unformat (input, "replay %s", &filename)) {
+ vl_msg_api_process_file (vm, filename, first, last, REPLAY);
+ } else if (unformat (input, "initializers %s", &filename)) {
+ vl_msg_api_process_file (vm, filename, first, last, INITIALIZERS);
+ } else if (unformat (input, "tx")) {
+ which = VL_API_TRACE_TX;
+ } else if (unformat (input, "first %d", &first)) {
+ ;
+ } else if (unformat (input, "last %d", &last)) {
+ ;
+ } else if (unformat (input, "status")) {
+ vlib_cli_output (vm, "%U", format_vl_msg_api_trace_status,
+ am, which);
+ } else if (unformat (input, "free")) {
+ vl_msg_api_trace_onoff (am, which, 0);
+ vl_msg_api_trace_free (am, which);
+ } else if (unformat (input, "post-mortem-on"))
+ post_mortem_dump_enabled = 1;
+ else if (unformat (input, "post-mortem-off"))
+ post_mortem_dump_enabled = 0;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+ return 0;
+}
+
+VLIB_CLI_COMMAND (api_trace_command, static) = {
+ .path = "api trace",
+ .short_help =
+ "api trace [on|off][dump|save|replay <file>][status][free][post-mortem-on]",
+ .function = api_trace_command_fn,
+};
+
+static clib_error_t *
+api_config_fn (vlib_main_t * vm, unformat_input_t * input)
+{
+ u32 nitems = 256<<10;
+ vl_api_trace_which_t which = VL_API_TRACE_RX;
+ api_main_t * am = &api_main;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (input, "on") || unformat (input, "enable")) {
+ if (unformat (input, "nitems %d", &nitems))
+ ;
+ vl_msg_api_trace_configure (am, which, nitems);
+ vl_msg_api_trace_onoff (am, which, 1 /* on */);
+ post_mortem_dump_enabled = 1;
+ } else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (api_config_fn, "api-trace");
+
+void vl_msg_api_post_mortem_dump (void)
+{
+ api_main_t * am = &api_main;
+ FILE *fp;
+ char filename[64];
+ int rv;
+
+ if (post_mortem_dump_enabled == 0)
+ return;
+
+ snprintf (filename, sizeof(filename), "/tmp/api_post_mortem.%d",
+ getpid());
+
+ fp = fopen (filename, "w");
+ if (fp == NULL) {
+ rv = write (2, "Couldn't create ", 16);
+ rv = write (2, filename, strlen(filename));
+ rv = write (2, "\n", 1);
+ return;
+ }
+ rv = vl_msg_api_trace_save (am, VL_API_TRACE_RX, fp);
+ fclose (fp);
+ if (rv < 0) {
+ rv = write (2, "Failed to save post-mortem API trace to ", 40);
+ rv = write (2, filename, strlen(filename));
+ rv = write (2, "\n", 1);
+ }
+
+}
+
+/* Layered message handling support */
+
+void vl_msg_api_register_pd_handler (void *fp, u16 msg_id_host_byte_order)
+{
+ api_main_t * am = &api_main;
+
+ /* Mild idiot proofing */
+ if (msg_id_host_byte_order > 10000)
+ clib_warning ("msg_id_host_byte_order endian issue? %d arg vs %d",
+ msg_id_host_byte_order,
+ clib_net_to_host_u16 (msg_id_host_byte_order));
+ vec_validate (am->pd_msg_handlers, msg_id_host_byte_order);
+ am->pd_msg_handlers[msg_id_host_byte_order] = fp;
+}
+
+int vl_msg_api_pd_handler (void *mp, int rv)
+{
+ api_main_t * am = &api_main;
+ int (*fp)(void *, int);
+ u16 msg_id;
+
+ if (clib_arch_is_little_endian)
+ msg_id = clib_net_to_host_u16(*((u16 *)mp));
+ else
+ msg_id = *((u16 *)mp);
+
+ if (msg_id >= vec_len (am->pd_msg_handlers)
+ || am->pd_msg_handlers[msg_id] == 0)
+ return rv;
+
+ fp = am->pd_msg_handlers [msg_id];
+ rv = (*fp)(mp, rv);
+ return rv;
+}
+
+void vl_msg_api_set_first_available_msg_id (u16 first_avail)
+{
+ api_main_t * am = &api_main;
+
+ am->first_available_msg_id = first_avail;
+}
+
+u16 vl_msg_api_get_msg_ids (char * name, int n)
+{
+ api_main_t * am = &api_main;
+ u8 * name_copy;
+ vl_api_msg_range_t * rp;
+ uword * p;
+ u16 rv;
+
+ if (am->msg_range_by_name == 0)
+ am->msg_range_by_name = hash_create_string (0, sizeof(uword));
+
+ name_copy = format (0, "%s%c", name, 0);
+
+ p = hash_get_mem (am->msg_range_by_name, name_copy);
+ if (p) {
+ clib_warning ("WARNING: duplicate message range registration for '%s'",
+ name_copy);
+ vec_free(name_copy);
+ return ((u16) ~0);
+ }
+
+ if (n < 0 || n > 1024) {
+ clib_warning
+ ("WARNING: bad number of message-IDs (%d) requested by '%s'",
+ n, name_copy);
+ vec_free(name_copy);
+ return ((u16) ~0);
+ }
+
+ vec_add2 (am->msg_ranges, rp, 1);
+
+ rv = rp->first_msg_id = am->first_available_msg_id;
+ am->first_available_msg_id += n;
+ rp->last_msg_id = am->first_available_msg_id - 1;
+ rp->name = name_copy;
+
+ hash_set_mem (am->msg_range_by_name, name_copy, rp - am->msg_ranges);
+
+ return rv;
+}