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/*
* Copyright (c) 2019 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 <vnet/tcp/tcp_debug.h>
tcp_dbg_main_t tcp_dbg_main;
void
tcp_evt_track_register (elog_track_t * et)
{
tcp_dbg_main_t *tdm = &tcp_dbg_main;
u32 fl_len, track_index;
fl_len = vec_len (tdm->free_track_indices);
if (fl_len)
{
track_index = tdm->free_track_indices[fl_len - 1];
vec_dec_len (tdm->free_track_indices, 1);
et->track_index_plus_one = track_index + 1;
}
else
elog_track_register (&vlib_global_main.elog_main, et);
}
static const char *tcp_evt_grp_str[] = {
#define _(sym, str) str,
foreach_tcp_evt_grp
#undef _
};
static void
tcp_debug_show_groups (void)
{
tcp_dbg_main_t *tdm = &tcp_dbg_main;
vlib_main_t *vm = vlib_get_main ();
int i = 0;
vlib_cli_output (vm, "%-10s%-30s%-10s", "Index", "Group", "Level");
for (i = 0; i < TCP_EVT_N_GRP; i++)
vlib_cli_output (vm, "%-10d%-30s%-10d", i, tcp_evt_grp_str[i],
tdm->grp_dbg_lvl[i]);
}
static void
tcp_debug_check_lc (void)
{
tcp_dbg_main_t *tdm = &tcp_dbg_main;
int i, have_enabled = 0;
if (tdm->grp_dbg_lvl[TCP_EVT_GRP_LC])
return;
for (i = 0; i < TCP_EVT_N_GRP; i++)
{
if (tdm->grp_dbg_lvl[i])
{
have_enabled = 1;
break;
}
}
/* Make sure LC is enabled for track initialization */
if (have_enabled)
tdm->grp_dbg_lvl[TCP_EVT_GRP_LC] = 1;
}
static clib_error_t *
tcp_debug_fn (vlib_main_t * vm, unformat_input_t * input,
vlib_cli_command_t * cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
tcp_dbg_main_t *tdm = &tcp_dbg_main;
u32 group = ~0, level = ~0;
clib_error_t *error = 0;
u8 is_show = 0;
if (!TCP_DEBUG_ALWAYS)
return clib_error_return (0, "must compile with TCP_DEBUG_ALWAYS set");
if (!unformat_user (input, unformat_line_input, line_input))
return clib_error_return (0, "expected enable | disable");
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "show"))
is_show = 1;
else if (unformat (line_input, "group %d", &group))
;
else if (unformat (line_input, "level %d", &level))
;
else
{
error = clib_error_return (0, "unknown input `%U'",
format_unformat_error, line_input);
goto done;
}
}
if (is_show)
{
tcp_debug_show_groups ();
goto done;
}
if (group >= TCP_EVT_N_GRP)
{
error = clib_error_return (0, "group out of bounds");
goto done;
}
if (group == ~0 || level == ~0)
{
error = clib_error_return (0, "group and level must be set");
goto done;
}
tdm->grp_dbg_lvl[group] = level;
tcp_debug_check_lc ();
done:
unformat_free (line_input);
return error;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (tcp_debug_command, static) =
{
.path = "tcp debug",
.short_help = "tcp [show] [debug group <N> level <N>]",
.function = tcp_debug_fn,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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