Actions also need to be considered when checking for matching triggers - triggers differing only by action should be allowed, but currently aren't because the matching check ignores the action and erroneously returns -EEXIST.
Add and call an actions_match() function to address that. Signed-off-by: Tom Zanussi <[email protected]> --- kernel/trace/trace_events_hist.c | 50 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 468e43f..ae84470 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -4363,6 +4363,53 @@ static void print_onmatch_spec(struct seq_file *m, seq_puts(m, ")"); } +static bool actions_match(struct hist_trigger_data *hist_data, + struct hist_trigger_data *hist_data_test) +{ + unsigned int i, j; + + if (hist_data->n_actions != hist_data_test->n_actions) + return false; + + for (i = 0; i < hist_data->n_actions; i++) { + struct action_data *data = hist_data->actions[i]; + struct action_data *data_test = hist_data_test->actions[i]; + + if (data->fn != data_test->fn) + return false; + + if (data->n_params != data_test->n_params) + return false; + + for (j = 0; j < data->n_params; j++) { + if (strcmp(data->params[j], data_test->params[j]) != 0) + return false; + } + + if (data->fn == action_trace) { + if (strcmp(data->onmatch.synth_event_name, + data_test->onmatch.synth_event_name) != 0) + return false; + if (strcmp(data->onmatch.match_event_system, + data_test->onmatch.match_event_system) != 0) + return false; + if (strcmp(data->onmatch.match_event, + data_test->onmatch.match_event) != 0) + return false; + } else if (data->fn == onmax_save) { + if (strcmp(data->onmax.var_str, + data_test->onmax.var_str) != 0) + return false; + if (strcmp(data->onmax.fn_name, + data_test->onmax.fn_name) != 0) + return false; + } + } + + return true; +} + + static void print_actions_spec(struct seq_file *m, struct hist_trigger_data *hist_data) { @@ -5173,6 +5220,9 @@ static bool hist_trigger_match(struct event_trigger_data *data, (strcmp(data->filter_str, data_test->filter_str) != 0)) return false; + if (!actions_match(hist_data, hist_data_test)) + return false; + return true; } -- 1.9.3
