X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Fbackend_types.h;h=fa6baaa07adecaae783e9f6131a1c57ed515b46e;hb=5b4ea313ddc10d96388a20a42e118c758479a553;hp=6813dd8b47a4127c3dbacc717c50742f96bbe561;hpb=886d51a3d7ed5fa6b41d7f19b3e14ae6c535a44c;p=lttng-modules.git

diff --git a/lib/ringbuffer/backend_types.h b/lib/ringbuffer/backend_types.h
index 6813dd8b..fa6baaa0 100644
--- a/lib/ringbuffer/backend_types.h
+++ b/lib/ringbuffer/backend_types.h
@@ -1,34 +1,23 @@
-#ifndef _LIB_RING_BUFFER_BACKEND_TYPES_H
-#define _LIB_RING_BUFFER_BACKEND_TYPES_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
+ *
  * lib/ringbuffer/backend_types.h
  *
  * Ring buffer backend (types).
  *
  * 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
  */
 
+#ifndef _LIB_RING_BUFFER_BACKEND_TYPES_H
+#define _LIB_RING_BUFFER_BACKEND_TYPES_H
+
 #include <linux/cpumask.h>
 #include <linux/types.h>
+#include <lttng-kernel-version.h>
+#include <lttng-cpuhotplug.h>
 
 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 +33,16 @@ 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 +54,8 @@ 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.
@@ -83,7 +84,13 @@ 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);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+	struct lttng_cpuhp_node cpuhp_prepare;	/* CPU hotplug prepare */
+#else
 	struct notifier_block cpu_hp_notifier;	 /* CPU hotplug notifier */
+#endif
 	/*
 	 * We need to copy config because the module containing the
 	 * source config can vanish before the last reference to this