Move to kernel style SPDX license identifiers

[babeltrace.git] / src / plugins / ctf / lttng-live / metadata.c

diff --git a/src/plugins/ctf/lttng-live/metadata.c b/src/plugins/ctf/lttng-live/metadata.c
index d347534da7e006457c845df89e33bac3ad4b24cd..859a36de954e31f491c4e4762076a553a5fa184b 100644 (file)
--- a/src/plugins/ctf/lttng-live/metadata.c
+++ b/src/plugins/ctf/lttng-live/metadata.c
@@ -1,27 +1,9 @@
 /*
- * Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
- * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
- * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
+ * SPDX-License-Identifier: MIT
  *
- * Some functions are based on older functions written by Mathieu Desnoyers.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
+ * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
  */
 
 #define BT_COMP_LOG_SELF_COMP self_comp
@@ -145,11 +127,7 @@ enum lttng_live_iterator_status lttng_live_metadata_update(
                goto end;
        }
 
-       if (!metadata->trace) {
-               trace->new_metadata_needed = false;
-       }
-
-       if (!trace->new_metadata_needed) {
+       if (trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
                goto end;
        }
 
@@ -201,7 +179,14 @@ enum lttng_live_iterator_status lttng_live_metadata_update(
                        BT_COMP_LOGD("Metadata stream was closed by the Relay, the trace is no longer active: "
                                "trace-id=%"PRIu64", metadata-stream-id=%"PRIu64,
                                trace->id, metadata->stream_id);
+                       /*
+                        * The stream was closed and we received everything
+                        * there was to receive for this metadata stream.
+                        * We go on with the decoding of what we received. So
+                        * that data stream can be decoded.
+                        */
                        keep_receiving = false;
+                       trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED;
                        break;
                case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
                        BT_COMP_LOGE_APPEND_CAUSE(self_comp,
@@ -213,15 +198,6 @@ enum lttng_live_iterator_status lttng_live_metadata_update(
                }
        }
 
-       /*
-        * A closed metadata stream means the trace is no longer active. Return
-        * _END so that the caller can remove the trace from its list.
-        */
-       if (metadata_status == LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED) {
-               status = LTTNG_LIVE_ITERATOR_STATUS_END;
-               goto end;
-       }
-
        /* The memory buffer `metadata_buf` contains all the metadata. */
        if (bt_close_memstream(&metadata_buf, &size, fp)) {
                BT_COMP_LOGW_ERRNO("Metadata bt_close_memstream", ".");
@@ -234,7 +210,9 @@ enum lttng_live_iterator_status lttng_live_metadata_update(
                        status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
                        goto end;
                }
-               trace->new_metadata_needed = false;
+
+               /* The relay sent zero bytes of metdata. */
+               trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
                goto end;
        }
 
@@ -294,7 +272,9 @@ enum lttng_live_iterator_status lttng_live_metadata_update(
                        trace->clock_class =
                                borrow_any_clock_class(trace->trace_class);
                }
-               trace->new_metadata_needed = false;
+
+               /* The metadata was updated succesfully. */
+               trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
 
                break;
        case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
@@ -352,13 +332,13 @@ int lttng_live_metadata_create_stream(struct lttng_live_session *session,
                        "Failed to create CTF metadata decoder");
                goto error;
        }
-       trace = lttng_live_borrow_trace(session, ctf_trace_id);
+       trace = lttng_live_session_borrow_or_create_trace_by_id(session,
+               ctf_trace_id);
        if (!trace) {
                BT_COMP_LOGE_APPEND_CAUSE(self_comp,
                        "Failed to borrow trace");
                goto error;
        }
-       metadata->trace = trace;
        trace->metadata = metadata;
        return 0;