kref_init(&metadata_cache->refcount);
session->metadata_cache = metadata_cache;
INIT_LIST_HEAD(&metadata_cache->metadata_stream);
+ memcpy(&metadata_cache->uuid, &session->uuid,
+ sizeof(metadata_cache->uuid));
list_add(&session->list, &sessions);
mutex_unlock(&sessions_mutex);
return session;
ret = -ENOENT;
goto register_error;
}
- ret = kabi_2635_tracepoint_probe_register(event_param->name,
+ ret = lttng_wrapper_tracepoint_probe_register(event->desc->kname,
event->desc->probe_callback,
event);
if (ret) {
switch (event->instrumentation) {
case LTTNG_KERNEL_TRACEPOINT:
- ret = kabi_2635_tracepoint_probe_unregister(event->desc->name,
+ ret = lttng_wrapper_tracepoint_probe_unregister(event->desc->kname,
event->desc->probe_callback,
event);
if (ret)
/*
* Ensure we support mutiple get_next / put sequences followed
- * by put_next.
+ * by put_next. The metadata stream lock internally protects
+ * reading the metadata cache. It can indeed be read
+ * concurrently by "get_next_subbuf" and "flush" operations on
+ * the buffer invoked by different processes.
*/
+ mutex_lock(&stream->lock);
WARN_ON(stream->metadata_in < stream->metadata_out);
if (stream->metadata_in != stream->metadata_out)
- return 0;
+ goto end;
len = stream->metadata_cache->metadata_written -
stream->metadata_in;
if (!len)
- return 0;
+ goto end;
reserve_len = min_t(size_t,
stream->transport->ops.packet_avail_size(chan),
len);
ret = reserve_len;
end:
+ mutex_unlock(&stream->lock);
return ret;
}
{
int ret;
+ ret = wrapper_lttng_fixup_sig(THIS_MODULE);
+ if (ret)
+ return ret;
+
+ ret = lttng_tracepoint_init();
+ if (ret)
+ return ret;
event_cache = KMEM_CACHE(lttng_event, 0);
- if (!event_cache)
- return -ENOMEM;
+ if (!event_cache) {
+ ret = -ENOMEM;
+ goto error_kmem;
+ }
ret = lttng_abi_init();
if (ret)
goto error_abi;
+ ret = lttng_logger_init();
+ if (ret)
+ goto error_logger;
return 0;
+
+error_logger:
+ lttng_abi_exit();
error_abi:
kmem_cache_destroy(event_cache);
+error_kmem:
+ lttng_tracepoint_exit();
return ret;
}
{
struct lttng_session *session, *tmpsession;
+ lttng_logger_exit();
lttng_abi_exit();
list_for_each_entry_safe(session, tmpsession, &sessions, list)
lttng_session_destroy(session);
kmem_cache_destroy(event_cache);
+ lttng_tracepoint_exit();
}
module_exit(lttng_events_exit);
MODULE_DESCRIPTION("LTTng Events");
MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
__stringify(LTTNG_MODULES_MINOR_VERSION) "."
- __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION));
+ __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
+ LTTNG_MODULES_EXTRAVERSION);