[PATCH v2 19/40] tracing: Account for variables in named trigger compatibility
From: Tom Zanussi <hidden>
Date: 2017-09-05 22:05:13
Also in:
lkml
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
Named triggers must also have the same set of variables in order to be considered compatible - update the trigger match test to account for that. The reason for this requirement is that named triggers with variables are meant to allow one or more events to set the same variable. Signed-off-by: Tom Zanussi <redacted> --- kernel/trace/trace_events_hist.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index f60e8ee..3c4eae9 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c@@ -1598,7 +1598,7 @@ static int event_hist_trigger_print(struct seq_file *m, sort_key = &hist_data->sort_keys[i]; idx = sort_key->field_idx; - if (WARN_ON(idx >= TRACING_MAP_FIELDS_MAX)) + if (WARN_ON(idx >= HIST_FIELDS_MAX)) return -EINVAL; if (i > 0)
@@ -1786,6 +1786,12 @@ static bool hist_trigger_match(struct event_trigger_data *data, return false; if (key_field->is_signed != key_field_test->is_signed) return false; + if ((key_field->var.name && !key_field_test->var.name) || + (!key_field->var.name && key_field_test->var.name)) + return false; + if ((key_field->var.name && key_field_test->var.name) && + strcmp(key_field->var.name, key_field_test->var.name) != 0) + return false; } for (i = 0; i < hist_data->n_sort_keys; i++) {
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1.9.3