diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 141 |
1 files changed, 57 insertions, 84 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 5b4e04780411..42058a1b5146 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -2053,24 +2053,72 @@ out: } EXPORT_SYMBOL_GPL(synth_event_trace_start); -static int save_synth_val(struct synth_field *field, u64 val, - struct synth_event_trace_state *trace_state) +static int __synth_event_add_val(const char *field_name, u64 val, + struct synth_event_trace_state *trace_state) { - struct synth_trace_event *entry = trace_state->entry; + struct synth_field *field = NULL; + struct synth_trace_event *entry; + struct synth_event *event; + int i, ret = 0; + + if (!trace_state) { + ret = -EINVAL; + goto out; + } + + /* can't mix add_next_synth_val() with add_synth_val() */ + if (field_name) { + if (trace_state->add_next) { + ret = -EINVAL; + goto out; + } + trace_state->add_name = true; + } else { + if (trace_state->add_name) { + ret = -EINVAL; + goto out; + } + trace_state->add_next = true; + } + + if (!trace_state->enabled) + goto out; + + event = trace_state->event; + if (trace_state->add_name) { + for (i = 0; i < event->n_fields; i++) { + field = event->fields[i]; + if (strcmp(field->name, field_name) == 0) + break; + } + if (!field) { + ret = -EINVAL; + goto out; + } + } else { + if (trace_state->cur_field >= event->n_fields) { + ret = -EINVAL; + goto out; + } + field = event->fields[trace_state->cur_field++]; + } + entry = trace_state->entry; if (field->is_string) { char *str_val = (char *)(long)val; char *str_field; - if (!str_val) - return -EINVAL; + if (!str_val) { + ret = -EINVAL; + goto out; + } str_field = (char *)&entry->fields[field->offset]; strscpy(str_field, str_val, STR_VAR_LEN_MAX); } else entry->fields[field->offset] = val; - - return 0; + out: + return ret; } /** @@ -2104,54 +2152,10 @@ static int save_synth_val(struct synth_field *field, u64 val, int synth_event_add_next_val(u64 val, struct synth_event_trace_state *trace_state) { - struct synth_field *field; - struct synth_event *event; - int ret = 0; - - if (!trace_state) { - ret = -EINVAL; - goto out; - } - - /* can't mix add_next_synth_val() with add_synth_val() */ - if (trace_state->add_name) { - ret = -EINVAL; - goto out; - } - trace_state->add_next = true; - - if (!trace_state->enabled) - goto out; - - event = trace_state->event; - - if (trace_state->cur_field >= event->n_fields) { - ret = -EINVAL; - goto out; - } - - field = event->fields[trace_state->cur_field++]; - ret = save_synth_val(field, val, trace_state); - out: - return ret; + return __synth_event_add_val(NULL, val, trace_state); } EXPORT_SYMBOL_GPL(synth_event_add_next_val); -static struct synth_field *find_synth_field(struct synth_event *event, - const char *field_name) -{ - struct synth_field *field = NULL; - unsigned int i; - - for (i = 0; i < event->n_fields; i++) { - field = event->fields[i]; - if (strcmp(field->name, field_name) == 0) - return field; - } - - return NULL; -} - /** * synth_event_add_val - Add a named field's value to an open synth trace * @field_name: The name of the synthetic event field value to set @@ -2183,38 +2187,7 @@ static struct synth_field *find_synth_field(struct synth_event *event, int synth_event_add_val(const char *field_name, u64 val, struct synth_event_trace_state *trace_state) { - struct synth_trace_event *entry; - struct synth_event *event; - struct synth_field *field; - int ret = 0; - - if (!trace_state) { - ret = -EINVAL; - goto out; - } - - /* can't mix add_next_synth_val() with add_synth_val() */ - if (trace_state->add_next) { - ret = -EINVAL; - goto out; - } - trace_state->add_name = true; - - if (!trace_state->enabled) - goto out; - - event = trace_state->event; - entry = trace_state->entry; - - field = find_synth_field(event, field_name); - if (!field) { - ret = -EINVAL; - goto out; - } - - ret = save_synth_val(field, val, trace_state); - out: - return ret; + return __synth_event_add_val(field_name, val, trace_state); } EXPORT_SYMBOL_GPL(synth_event_add_val); |