11dde0f48SLluís Vilanova /*
21dde0f48SLluís Vilanova * QMP commands for tracing events.
31dde0f48SLluís Vilanova *
477e2b172SLluís Vilanova * Copyright (C) 2014-2016 Lluís Vilanova <vilanova@ac.upc.edu>
51dde0f48SLluís Vilanova *
61dde0f48SLluís Vilanova * This work is licensed under the terms of the GNU GPL, version 2 or later.
71dde0f48SLluís Vilanova * See the COPYING file in the top-level directory.
81dde0f48SLluís Vilanova */
91dde0f48SLluís Vilanova
10d38ea87aSPeter Maydell #include "qemu/osdep.h"
11e688df6bSMarkus Armbruster #include "qapi/error.h"
129af23989SMarkus Armbruster #include "qapi/qapi-commands-trace.h"
13*333df1c6SAlex Bennée #include "control.h"
141dde0f48SLluís Vilanova
151dde0f48SLluís Vilanova
check_events(bool ignore_unavailable,bool is_pattern,const char * name,Error ** errp)1689aafcf2SAlex Bennée static bool check_events(bool ignore_unavailable, bool is_pattern,
1777e2b172SLluís Vilanova const char *name, Error **errp)
1877e2b172SLluís Vilanova {
1977e2b172SLluís Vilanova if (!is_pattern) {
2077e2b172SLluís Vilanova TraceEvent *ev = trace_event_name(name);
2177e2b172SLluís Vilanova
2277e2b172SLluís Vilanova /* error for non-existing event */
2377e2b172SLluís Vilanova if (ev == NULL) {
2477e2b172SLluís Vilanova error_setg(errp, "unknown event \"%s\"", name);
2577e2b172SLluís Vilanova return false;
2677e2b172SLluís Vilanova }
2777e2b172SLluís Vilanova
2877e2b172SLluís Vilanova /* error for unavailable event */
2977e2b172SLluís Vilanova if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
3077e2b172SLluís Vilanova error_setg(errp, "event \"%s\" is disabled", name);
3177e2b172SLluís Vilanova return false;
3277e2b172SLluís Vilanova }
3377e2b172SLluís Vilanova
3477e2b172SLluís Vilanova return true;
3577e2b172SLluís Vilanova } else {
3677e2b172SLluís Vilanova /* error for unavailable events */
370d4e995cSDaniel P. Berrange TraceEventIter iter;
380d4e995cSDaniel P. Berrange TraceEvent *ev;
39117856c3SGerd Hoffmann trace_event_iter_init_pattern(&iter, name);
400d4e995cSDaniel P. Berrange while ((ev = trace_event_iter_next(&iter)) != NULL) {
4177e2b172SLluís Vilanova if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
4277e2b172SLluís Vilanova error_setg(errp, "event \"%s\" is disabled", trace_event_get_name(ev));
4377e2b172SLluís Vilanova return false;
4477e2b172SLluís Vilanova }
4577e2b172SLluís Vilanova }
4677e2b172SLluís Vilanova return true;
4777e2b172SLluís Vilanova }
4877e2b172SLluís Vilanova }
4977e2b172SLluís Vilanova
qmp_trace_event_get_state(const char * name,Error ** errp)5077e2b172SLluís Vilanova TraceEventInfoList *qmp_trace_event_get_state(const char *name,
5177e2b172SLluís Vilanova Error **errp)
5277e2b172SLluís Vilanova {
5377e2b172SLluís Vilanova TraceEventInfoList *events = NULL;
540d4e995cSDaniel P. Berrange TraceEventIter iter;
5577e2b172SLluís Vilanova TraceEvent *ev;
5677e2b172SLluís Vilanova bool is_pattern = trace_event_is_pattern(name);
5777e2b172SLluís Vilanova
5877e2b172SLluís Vilanova /* Check events */
5989aafcf2SAlex Bennée if (!check_events(true, is_pattern, name, errp)) {
6077e2b172SLluís Vilanova return NULL;
6177e2b172SLluís Vilanova }
6277e2b172SLluís Vilanova
6377e2b172SLluís Vilanova /* Get states (all errors checked above) */
64117856c3SGerd Hoffmann trace_event_iter_init_pattern(&iter, name);
650d4e995cSDaniel P. Berrange while ((ev = trace_event_iter_next(&iter)) != NULL) {
6654aa3de7SEric Blake TraceEventInfo *value;
6777e2b172SLluís Vilanova
6854aa3de7SEric Blake value = g_new(TraceEventInfo, 1);
6954aa3de7SEric Blake value->name = g_strdup(trace_event_get_name(ev));
7077e2b172SLluís Vilanova
711dde0f48SLluís Vilanova if (!trace_event_get_state_static(ev)) {
7254aa3de7SEric Blake value->state = TRACE_EVENT_STATE_UNAVAILABLE;
731dde0f48SLluís Vilanova } else {
7477e2b172SLluís Vilanova if (trace_event_get_state_dynamic(ev)) {
7554aa3de7SEric Blake value->state = TRACE_EVENT_STATE_ENABLED;
7677e2b172SLluís Vilanova } else {
7754aa3de7SEric Blake value->state = TRACE_EVENT_STATE_DISABLED;
7877e2b172SLluís Vilanova }
7977e2b172SLluís Vilanova }
8054aa3de7SEric Blake QAPI_LIST_PREPEND(events, value);
811dde0f48SLluís Vilanova }
821dde0f48SLluís Vilanova
831dde0f48SLluís Vilanova return events;
841dde0f48SLluís Vilanova }
851dde0f48SLluís Vilanova
qmp_trace_event_set_state(const char * name,bool enable,bool has_ignore_unavailable,bool ignore_unavailable,Error ** errp)861dde0f48SLluís Vilanova void qmp_trace_event_set_state(const char *name, bool enable,
8777e2b172SLluís Vilanova bool has_ignore_unavailable, bool ignore_unavailable,
8877e2b172SLluís Vilanova Error **errp)
891dde0f48SLluís Vilanova {
900d4e995cSDaniel P. Berrange TraceEventIter iter;
911dde0f48SLluís Vilanova TraceEvent *ev;
9277e2b172SLluís Vilanova bool is_pattern = trace_event_is_pattern(name);
931dde0f48SLluís Vilanova
9477e2b172SLluís Vilanova /* Check events */
9589aafcf2SAlex Bennée if (!check_events(has_ignore_unavailable && ignore_unavailable,
9677e2b172SLluís Vilanova is_pattern, name, errp)) {
9777e2b172SLluís Vilanova return;
9877e2b172SLluís Vilanova }
9977e2b172SLluís Vilanova
10077e2b172SLluís Vilanova /* Apply changes (all errors checked above) */
101117856c3SGerd Hoffmann trace_event_iter_init_pattern(&iter, name);
1020d4e995cSDaniel P. Berrange while ((ev = trace_event_iter_next(&iter)) != NULL) {
10389aafcf2SAlex Bennée if (!trace_event_get_state_static(ev)) {
10477e2b172SLluís Vilanova continue;
10577e2b172SLluís Vilanova }
1061dde0f48SLluís Vilanova trace_event_set_state_dynamic(ev, enable);
1071dde0f48SLluís Vilanova }
1081dde0f48SLluís Vilanova }
109