X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=libringbuffer%2Fbackend_types.h;h=f821c27fdd0684695866148da84a6e1fd8599e62;hb=c0c0989ab70574e09b2f7e8b48c2da6af664a849;hp=cfbe59c3cdedefb091148f648671bd35972c01c0;hpb=14641debd03ba299bd06040cb62e0dbdef7fac81;p=lttng-ust.git

diff --git a/libringbuffer/backend_types.h b/libringbuffer/backend_types.h
index cfbe59c3..f821c27f 100644
--- a/libringbuffer/backend_types.h
+++ b/libringbuffer/backend_types.h
@@ -1,58 +1,81 @@
-#ifndef _LINUX_RING_BUFFER_BACKEND_TYPES_H
-#define _LINUX_RING_BUFFER_BACKEND_TYPES_H
-
 /*
- * linux/ringbuffer/backend_types.h
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * Copyright (C) 2008-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2008-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * Ring buffer backend (types).
- *
- * Dual LGPL v2.1/GPL v2 license.
  */
 
-struct lib_ring_buffer_backend_page {
-	void *virt;			/* page virtual address (cached) */
-	struct page *page;		/* pointer to page structure */
-};
+#ifndef _LTTNG_RING_BUFFER_BACKEND_TYPES_H
+#define _LTTNG_RING_BUFFER_BACKEND_TYPES_H
+
+#include <limits.h>
+#include <stdint.h>
+#include "shm_internal.h"
+#include "vatomic.h"
 
-struct lib_ring_buffer_backend_pages {
+#define RB_BACKEND_PAGES_PADDING	16
+struct lttng_ust_lib_ring_buffer_backend_pages {
 	unsigned long mmap_offset;	/* offset of the subbuffer in mmap */
 	union v_atomic records_commit;	/* current records committed count */
 	union v_atomic records_unread;	/* records to read */
 	unsigned long data_size;	/* Amount of data to read from subbuf */
-	struct lib_ring_buffer_backend_page p[];
+	DECLARE_SHMP(char, p);		/* Backing memory map */
+	char padding[RB_BACKEND_PAGES_PADDING];
 };
 
-struct lib_ring_buffer_backend_subbuffer {
+struct lttng_ust_lib_ring_buffer_backend_subbuffer {
 	/* Identifier for subbuf backend pages. Exchanged atomically. */
 	unsigned long id;		/* backend subbuffer identifier */
 };
 
+struct lttng_ust_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.
  */
 struct channel;
-struct lib_ring_buffer;
+struct lttng_ust_lib_ring_buffer;
+
+struct lttng_ust_lib_ring_buffer_backend_pages_shmp {
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_pages, shmp);
+};
 
-struct lib_ring_buffer_backend {
+#define RB_BACKEND_RING_BUFFER_PADDING		64
+struct lttng_ust_lib_ring_buffer_backend {
 	/* Array of ring_buffer_backend_subbuffer for writer */
-	struct lib_ring_buffer_backend_subbuffer *buf_wsb;
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_subbuffer, buf_wsb);
 	/* ring_buffer_backend_subbuffer for reader */
-	struct lib_ring_buffer_backend_subbuffer buf_rsb;
+	struct lttng_ust_lib_ring_buffer_backend_subbuffer buf_rsb;
+	/* Array of lib_ring_buffer_backend_counts for the packet counter */
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_counts, buf_cnt);
 	/*
 	 * Pointer array of backend pages, for whole buffer.
 	 * Indexed by ring_buffer_backend_subbuffer identifier (id) index.
 	 */
-	struct lib_ring_buffer_backend_pages **array;
-	unsigned int num_pages_per_subbuf;
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_pages_shmp, array);
+	DECLARE_SHMP(char, memory_map);	/* memory mapping */
 
-	struct channel *chan;		/* Associated channel */
+	DECLARE_SHMP(struct channel, chan);	/* Associated channel */
 	int cpu;			/* This buffer's cpu. -1 if global. */
 	union v_atomic records_read;	/* Number of records read */
-	unsigned int allocated:1;	/* Bool: is buffer allocated ? */
+	unsigned int allocated:1;	/* is buffer allocated ? */
+	char padding[RB_BACKEND_RING_BUFFER_PADDING];
 };
 
+struct lttng_ust_lib_ring_buffer_shmp {
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer, shmp); /* Channel per-cpu buffers */
+};
+
+#define RB_BACKEND_CHANNEL_PADDING	64
 struct channel_backend {
 	unsigned long buf_size;		/* Size of the buffer */
 	unsigned long subbuf_size;	/* Sub-buffer size */
@@ -62,14 +85,14 @@ struct channel_backend {
 					 * for writer.
 					 */
 	unsigned int buf_size_order;	/* Order of buffer size */
-	int extra_reader_sb:1;		/* Bool: has extra reader subbuffer */
-	struct lib_ring_buffer *buf;	/* Channel per-cpu buffers */
-
+	unsigned int extra_reader_sb:1;	/* has extra reader subbuffer ? */
 	unsigned long num_subbuf;	/* Number of sub-buffers for writer */
-	u64 start_tsc;			/* Channel creation TSC value */
-	void *priv;			/* Client-specific information */
-	const struct lib_ring_buffer_config *config; /* Ring buffer configuration */
+	uint64_t start_tsc;		/* Channel creation TSC value */
+	DECLARE_SHMP(void *, priv_data);/* Client-specific information */
+	struct lttng_ust_lib_ring_buffer_config config; /* Ring buffer configuration */
 	char name[NAME_MAX];		/* Channel name */
+	char padding[RB_BACKEND_CHANNEL_PADDING];
+	struct lttng_ust_lib_ring_buffer_shmp buf[];
 };
 
-#endif /* _LINUX_RING_BUFFER_BACKEND_TYPES_H */
+#endif /* _LTTNG_RING_BUFFER_BACKEND_TYPES_H */