X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=lib%2Fringbuffer%2Fbackend_types.h;h=c1d8be18323c2dc5b31003015ae69b1a81b83004;hb=8ec496cfb24b29a54c057a332fc91e761994999e;hp=1577c812bb93c1df71cb5f736d8c1de6c8a933f6;hpb=dd5a0db3ea07c46bee3c1814ef7326736f38a06e;p=lttng-modules.git

diff --git a/lib/ringbuffer/backend_types.h b/lib/ringbuffer/backend_types.h
index 1577c812..c1d8be18 100644
--- a/lib/ringbuffer/backend_types.h
+++ b/lib/ringbuffer/backend_types.h
@@ -28,7 +28,7 @@
 
 struct lib_ring_buffer_backend_page {
 	void *virt;			/* page virtual address (cached) */
-	struct page *page;		/* pointer to page structure */
+	unsigned long pfn;		/* page frame number */
 };
 
 struct lib_ring_buffer_backend_pages {
@@ -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.