X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fcmd.c;h=1d4f9264eb0a57e4aedfa595767b1478b9402a4f;hp=b1e66e755bf0f621fb8c78f84a6d8c9043cedc55;hb=806e2684ce24d3772af37ee46c5f0500c7a0723f;hpb=ca22feea083301934d1c8511851c86fb008c0697

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index b1e66e755..1d4f9264e 100644
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -2334,6 +2334,47 @@ error:
 	return ret;
 }
 
+/*
+ * Command LTTNG_DATA_AVAILABLE returning 0 if the data is NOT ready to be read
+ * or else 1 if the data is available for trace analysis.
+ */
+int cmd_data_available(struct ltt_session *session)
+{
+	int ret;
+	struct ltt_kernel_session *ksess = session->kernel_session;
+	struct ltt_ust_session *usess = session->ust_session;
+
+	assert(session);
+
+	/* Session MUST be stopped to ask for data availability. */
+	if (session->enabled) {
+		ret = LTTNG_ERR_SESSION_STARTED;
+		goto error;
+	}
+
+	if (ksess && ksess->consumer) {
+		ret = consumer_is_data_available(ksess->id, ksess->consumer);
+		if (ret == 0) {
+			/* Data is still being extracted for the kernel. */
+			goto error;
+		}
+	}
+
+	if (usess && usess->consumer) {
+		ret = consumer_is_data_available(usess->id, usess->consumer);
+		if (ret == 0) {
+			/* Data is still being extracted for the kernel. */
+			goto error;
+		}
+	}
+
+	/* Data is ready to be read by a viewer */
+	ret = 1;
+
+error:
+	return ret;
+}
+
 /*
  * Init command subsystem.
  */