X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=lib%2Fringbuffer%2Fbackend_types.h;h=c1d8be18323c2dc5b31003015ae69b1a81b83004;hb=8ec496cfb24b29a54c057a332fc91e761994999e;hp=4578185c3c75d8a1fb307a5e78ddbb1567bbd878;hpb=5a8fd222992df9bbb709836e5bf4ca053dd776c3;p=lttng-modules.git

diff --git a/lib/ringbuffer/backend_types.h b/lib/ringbuffer/backend_types.h
index 4578185c..c1d8be18 100644
--- a/lib/ringbuffer/backend_types.h
+++ b/lib/ringbuffer/backend_types.h
@@ -1,14 +1,26 @@
-#ifndef _LINUX_RING_BUFFER_BACKEND_TYPES_H
-#define _LINUX_RING_BUFFER_BACKEND_TYPES_H
+#ifndef _LIB_RING_BUFFER_BACKEND_TYPES_H
+#define _LIB_RING_BUFFER_BACKEND_TYPES_H
 
 /*
- * linux/ringbuffer/backend_types.h
- *
- * Copyright (C) 2008-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * lib/ringbuffer/backend_types.h
  *
  * Ring buffer backend (types).
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2008-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <linux/cpumask.h>
@@ -16,7 +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 {
@@ -32,6 +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.
  */
@@ -43,6 +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.
@@ -71,6 +95,8 @@ struct channel_backend {
 	unsigned long num_subbuf;	/* Number of sub-buffers for writer */
 	u64 start_tsc;			/* Channel creation TSC value */
 	void *priv;			/* Client-specific information */
+	void *priv_ops;			/* Client-specific ops pointer */
+	void (*release_priv_ops)(void *priv_ops);
 	struct notifier_block cpu_hp_notifier;	 /* CPU hotplug notifier */
 	/*
 	 * We need to copy config because the module containing the
@@ -82,4 +108,4 @@ struct channel_backend {
 	char name[NAME_MAX];		/* Channel name */
 };
 
-#endif /* _LINUX_RING_BUFFER_BACKEND_TYPES_H */
+#endif /* _LIB_RING_BUFFER_BACKEND_TYPES_H */