relayd: open live viewer files from the current stream's trace chunk

[lttng-tools.git] / src / bin / lttng-relayd / viewer-stream.c

diff --git a/src/bin/lttng-relayd/viewer-stream.c b/src/bin/lttng-relayd/viewer-stream.c
index 60aa4371d5cc446bb4dac4bdd654e13d45adc9ea..21294d1f32dfc700c33c1075b1343e36b84c2833 100644 (file)
--- a/src/bin/lttng-relayd/viewer-stream.c
+++ b/src/bin/lttng-relayd/viewer-stream.c
@@ -43,7 +43,13 @@ static void viewer_stream_destroy_rcu(struct rcu_head *head)
 struct relay_viewer_stream *viewer_stream_create(struct relay_stream *stream,
                enum lttng_viewer_seek seek_t)
 {
-       struct relay_viewer_stream *vstream;
+       struct relay_viewer_stream *vstream = NULL;
+       const bool acquired_reference = lttng_trace_chunk_get(
+                       stream->trace_chunk);
+
+       if (!acquired_reference) {
+               goto error;
+       }
 
        vstream = zmalloc(sizeof(*vstream));
        if (!vstream) {
@@ -51,6 +57,7 @@ struct relay_viewer_stream *viewer_stream_create(struct relay_stream *stream,
                goto error;
        }
 
+       vstream->stream_file.trace_chunk = stream->trace_chunk;
        vstream->path_name = lttng_strndup(stream->path_name, LTTNG_VIEWER_PATH_MAX);
        if (vstream->path_name == NULL) {
                PERROR("relay viewer path_name alloc");
@@ -118,10 +125,17 @@ struct relay_viewer_stream *viewer_stream_create(struct relay_stream *stream,
        if (stream->index_received_seqcount == 0) {
                vstream->index_file = NULL;
        } else {
-               vstream->index_file = lttng_index_file_open(vstream->path_name,
-                               vstream->channel_name,
-                               stream->tracefile_count,
-                               vstream->current_tracefile_id);
+               const uint32_t connection_major = stream->trace->session->major;
+               const uint32_t connection_minor = stream->trace->session->minor;
+
+               vstream->index_file = lttng_index_file_create_from_trace_chunk_read_only(
+                               stream->trace_chunk, stream->path_name,
+                               stream->channel_name, stream->tracefile_size,
+                               vstream->current_tracefile_id,
+                               lttng_to_index_major(connection_major,
+                                               connection_minor),
+                               lttng_to_index_minor(connection_major,
+                                               connection_minor));
                if (!vstream->index_file) {
                        goto error_unlock;
                }
@@ -179,9 +193,9 @@ static void viewer_stream_release(struct urcu_ref *ref)
 
        viewer_stream_unpublish(vstream);
 
-       if (vstream->stream_fd) {
-               stream_fd_put(vstream->stream_fd);
-               vstream->stream_fd = NULL;
+       if (vstream->stream_file.fd) {
+               stream_fd_put(vstream->stream_file.fd);
+               vstream->stream_file.fd = NULL;
        }
        if (vstream->index_file) {
                lttng_index_file_put(vstream->index_file);
@@ -191,6 +205,7 @@ static void viewer_stream_release(struct urcu_ref *ref)
                stream_put(vstream->stream);
                vstream->stream = NULL;
        }
+       lttng_trace_chunk_put(vstream->stream_file.trace_chunk);
        call_rcu(&vstream->rcu_node, viewer_stream_destroy_rcu);
 }
 
@@ -243,8 +258,10 @@ void viewer_stream_put(struct relay_viewer_stream *vstream)
 int viewer_stream_rotate(struct relay_viewer_stream *vstream)
 {
        int ret;
-       struct relay_stream *stream = vstream->stream;
        uint64_t new_id;
+       const struct relay_stream *stream = vstream->stream;
+       const uint32_t connection_major = stream->trace->session->major;
+       const uint32_t connection_minor = stream->trace->session->minor;
 
        /* Detect the last tracefile to open. */
        if (stream->index_received_seqcount
@@ -289,15 +306,20 @@ int viewer_stream_rotate(struct relay_viewer_stream *vstream)
                lttng_index_file_put(vstream->index_file);
                vstream->index_file = NULL;
        }
-       if (vstream->stream_fd) {
-               stream_fd_put(vstream->stream_fd);
-               vstream->stream_fd = NULL;
+       if (vstream->stream_file.fd) {
+               stream_fd_put(vstream->stream_file.fd);
+               vstream->stream_file.fd = NULL;
        }
-
-       vstream->index_file = lttng_index_file_open(vstream->path_name,
-                       vstream->channel_name,
-                       stream->tracefile_count,
-                       vstream->current_tracefile_id);
+       vstream->index_file =
+                       lttng_index_file_create_from_trace_chunk_read_only(
+                                       stream->trace_chunk, stream->path_name,
+                                       stream->channel_name,
+                                       stream->tracefile_size,
+                                       vstream->current_tracefile_id,
+                                       lttng_to_index_major(connection_major,
+                                                       connection_minor),
+                                       lttng_to_index_minor(connection_major,
+                                                       connection_minor));
        if (!vstream->index_file) {
                ret = -1;
                goto end;