X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fcmd.c;h=02a92be1e07e45ba71e4c767ebca0f6a18050ec9;hp=e067cb835e1a2739dfa35f83ce32a3d3c59b586a;hb=a40a503f4218296700d791f1b79671bf3d0f1e22;hpb=d4ad24a314cea1020c7cd08b27670f5da495e38d

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index e067cb835..02a92be1e 100644
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -4907,6 +4907,12 @@ int cmd_rotate_session(struct ltt_session *session,
 		goto end;
 	}
 
+	/* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */
+	if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) {
+		cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL;
+		goto end;
+	}
+
 	if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) {
 		DBG("Refusing to launch a rotation; a rotation is already in progress for session %s",
 				session->name);