Per-stream ioctl to get the current timestamp

[lttng-ust.git] / liblttng-ust-ctl / ustctl.c

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 28dee5e9cdf80118113f53522dc296460f66b1af..11fc70446ea5ac015d0d9e613df73c1aef785ad8 100644 (file)
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -31,6 +31,7 @@
 #include "../libringbuffer/backend.h"
 #include "../libringbuffer/frontend.h"
 #include "../liblttng-ust/wait.h"
+#include "../liblttng-ust/lttng-rb-clients.h"
 
 /*
  * Number of milliseconds to retry before failing metadata writes on
@@ -1461,6 +1462,130 @@ void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
                consumer_chan->chan->handle);
 }
 
+static
+struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb(
+               struct lttng_ust_lib_ring_buffer *buf,
+               struct lttng_ust_shm_handle *handle)
+{
+       struct channel *chan;
+       const struct lttng_ust_lib_ring_buffer_config *config;
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+
+       chan = shmp(handle, buf->backend.chan);
+       config = &chan->backend.config;
+       if (!config->cb_ptr)
+               return NULL;
+       client_cb = caa_container_of(config->cb_ptr,
+                       struct lttng_ust_client_lib_ring_buffer_client_cb,
+                       parent);
+       return client_cb;
+}
+
+int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream,
+               uint64_t *timestamp_begin)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !timestamp_begin)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb)
+               return -ENOSYS;
+       return client_cb->timestamp_begin(buf, handle, timestamp_begin);
+}
+
+int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream,
+       uint64_t *timestamp_end)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !timestamp_end)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb)
+               return -ENOSYS;
+       return client_cb->timestamp_end(buf, handle, timestamp_end);
+}
+
+int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream,
+       uint64_t *events_discarded)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !events_discarded)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb)
+               return -ENOSYS;
+       return client_cb->events_discarded(buf, handle, events_discarded);
+}
+
+int ustctl_get_content_size(struct ustctl_consumer_stream *stream,
+       uint64_t *content_size)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !content_size)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb)
+               return -ENOSYS;
+       return client_cb->content_size(buf, handle, content_size);
+}
+
+int ustctl_get_packet_size(struct ustctl_consumer_stream *stream,
+       uint64_t *packet_size)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !packet_size)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb)
+               return -ENOSYS;
+       return client_cb->packet_size(buf, handle, packet_size);
+}
+
+int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
+               uint64_t *stream_id)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !stream_id)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb)
+               return -ENOSYS;
+       return client_cb->stream_id(buf, handle, stream_id);
+}
+
+int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
+               uint64_t *ts)
+{
+       struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer *buf = stream->buf;
+       struct lttng_ust_shm_handle *handle = stream->chan->chan->handle;
+
+       if (!stream || !ts)
+               return -EINVAL;
+       client_cb = get_client_cb(buf, handle);
+       if (!client_cb || !client_cb->current_timestamp)
+               return -ENOSYS;
+       return client_cb->current_timestamp(buf, handle, ts);
+}
+
 /*
  * Returns 0 on success, negative error value on error.
  */