X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Fbackend_types.h;h=8c53d0754eee633e4bf958c11a82f77fbb95322e;hb=5b3cf4f924befda843a7736daf84f8ecae5e86a4;hp=1577c812bb93c1df71cb5f736d8c1de6c8a933f6;hpb=0e14d6e771153a9d4f1b52cb57e3fbce52d1749d;p=lttng-modules.git

diff --git a/lib/ringbuffer/backend_types.h b/lib/ringbuffer/backend_types.h
index 1577c812..8c53d075 100644
--- a/lib/ringbuffer/backend_types.h
+++ b/lib/ringbuffer/backend_types.h
@@ -44,6 +44,16 @@ struct lib_ring_buffer_backend_subbuffer {
 	unsigned long id;		/* backend subbuffer identifier */
 };
 
+struct lib_ring_buffer_backend_counts {
+	/*
+	 * Counter specific to the sub-buffer location within the ring buffer.
+	 * The actual sequence number of the packet within the entire ring
+	 * buffer can be derived from the formula nr_subbuffers * seq_cnt +
+	 * subbuf_idx.
+	 */
+	uint64_t seq_cnt;		/* packet sequence number */
+};
+
 /*
  * Forward declaration of frontend-specific channel and ring_buffer.
  */
@@ -55,6 +65,8 @@ struct lib_ring_buffer_backend {
 	struct lib_ring_buffer_backend_subbuffer *buf_wsb;
 	/* ring_buffer_backend_subbuffer for reader */
 	struct lib_ring_buffer_backend_subbuffer buf_rsb;
+	/* Array of lib_ring_buffer_backend_counts for the packet counter */
+	struct lib_ring_buffer_backend_counts *buf_cnt;
 	/*
 	 * Pointer array of backend pages, for whole buffer.
 	 * Indexed by ring_buffer_backend_subbuffer identifier (id) index.