X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel.c;h=b5c4a5e1267b5ae5fbe95cd70723ed2afb5710ab;hp=76162e08c75b3b15b226f02cc4f2625519e3d064;hb=a40a503f4218296700d791f1b79671bf3d0f1e22;hpb=d4ad24a314cea1020c7cd08b27670f5da495e38d

diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c
index 76162e08c..b5c4a5e12 100644
--- a/src/bin/lttng-sessiond/kernel.c
+++ b/src/bin/lttng-sessiond/kernel.c
@@ -1425,6 +1425,37 @@ error:
 	return ret;
 }
 
+/*
+ * Check for the support of the packet sequence number via abi version number.
+ *
+ * Return 1 on success, 0 when feature is not supported, negative value in case
+ * of errors.
+ */
+int kernel_supports_ring_buffer_packet_sequence_number(void)
+{
+	int ret = 0; // Not supported by default
+	struct lttng_kernel_tracer_abi_version abi;
+
+	ret = kernctl_tracer_abi_version(kernel_tracer_fd, &abi);
+	if (ret < 0) {
+		ERR("Failed to retrieve lttng-modules ABI version");
+		goto error;
+	}
+
+	/*
+	 * Packet sequence number was introduced in 2.8
+	 */
+	if (abi.major >= 2 && abi.minor >= 8) {
+		/* Supported */
+		ret = 1;
+	} else {
+		/* Not supported */
+		ret = 0;
+	}
+error:
+	return ret;
+}
+
 /*
  * Rotate a kernel session.
  *