From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 9 Dec 2019 15:41:43 +0000 (-0500)
Subject: Fix: sessiond: ust-app: per-pid buffers: Create empty ust/ directory
X-Git-Tag: v2.12.0-rc1~161
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=495dece518e24e6c8563c588be77b5e23e060a02

Fix: sessiond: ust-app: per-pid buffers: Create empty ust/ directory

When no applications are running, the toplevel ust/ directory is not
created in a chunk on rotation. Make sure this top level directory
is created.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ia272f3182df298302e02b3e096785cb51687b8c9
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 856de63a3..58308dec8 100644
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -6486,6 +6486,17 @@ enum lttng_error_code ust_app_create_channel_subdirectories(
 	{
 		struct ust_app *app;
 
+		/*
+		 * Create the toplevel ust/ directory in case no apps are running.
+		 */
+		chunk_status = lttng_trace_chunk_create_subdirectory(
+				usess->current_trace_chunk,
+				DEFAULT_UST_TRACE_DIR);
+		if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+			ret = LTTNG_ERR_CREATE_DIR_FAIL;
+			goto error;
+		}
+
 		cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app,
 				pid_n.node) {
 			struct ust_app_session *ua_sess;