Fix: compat layer only on supported architectures

[lttng-modules.git] / lib / ringbuffer / vfs.h

diff --git a/lib/ringbuffer/vfs.h b/lib/ringbuffer/vfs.h
index 0a09637af2b37c4e036c418745132a7198689c2f..625f9c91d932c0833c2c45ac771b69b16ded3d0e 100644 (file)
--- a/lib/ringbuffer/vfs.h
+++ b/lib/ringbuffer/vfs.h
@@ -1,17 +1,29 @@
-#ifndef _LINUX_RING_BUFFER_VFS_H
-#define _LINUX_RING_BUFFER_VFS_H
+#ifndef _LIB_RING_BUFFER_VFS_H
+#define _LIB_RING_BUFFER_VFS_H
 
 /*
- * linux/ringbuffer/vfs.h
- *
- * (C) Copyright 2005-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * lib/ringbuffer/vfs.h
  *
  * Wait-free ring buffer VFS file operations.
  *
+ * Copyright (C) 2005-2012 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
+ *
  * Author:
  *     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Dual LGPL v2.1/GPL v2 license.
  */
 
 #include <linux/fs.h>
@@ -83,5 +95,40 @@ long lib_ring_buffer_compat_ioctl(struct file *filp, unsigned int cmd,
 #define RING_BUFFER_GET_MMAP_LEN               _IOR(0xF6, 0x0A, unsigned long)
 /* returns the offset of the subbuffer belonging to the mmap reader. */
 #define RING_BUFFER_GET_MMAP_READ_OFFSET       _IOR(0xF6, 0x0B, unsigned long)
+/* flush the current sub-buffer */
+#define RING_BUFFER_FLUSH                      _IO(0xF6, 0x0C)
+
+#ifdef CONFIG_COMPAT
+/* Get a snapshot of the current ring buffer producer and consumer positions */
+#define RING_BUFFER_COMPAT_SNAPSHOT            RING_BUFFER_SNAPSHOT
+/* Get the consumer position (iteration start) */
+#define RING_BUFFER_COMPAT_SNAPSHOT_GET_CONSUMED \
+       _IOR(0xF6, 0x01, compat_ulong_t)
+/* Get the producer position (iteration end) */
+#define RING_BUFFER_COMPAT_SNAPSHOT_GET_PRODUCED \
+       _IOR(0xF6, 0x02, compat_ulong_t)
+/* Get exclusive read access to the specified sub-buffer position */
+#define RING_BUFFER_COMPAT_GET_SUBBUF          _IOW(0xF6, 0x03, compat_ulong_t)
+/* Release exclusive sub-buffer access */
+#define RING_BUFFER_COMPAT_PUT_SUBBUF          RING_BUFFER_PUT_SUBBUF
+
+/* Get exclusive read access to the next sub-buffer that can be read. */
+#define RING_BUFFER_COMPAT_GET_NEXT_SUBBUF     RING_BUFFER_GET_NEXT_SUBBUF
+/* Release exclusive sub-buffer access, move consumer forward. */
+#define RING_BUFFER_COMPAT_PUT_NEXT_SUBBUF     RING_BUFFER_PUT_NEXT_SUBBUF
+/* returns the size of the current sub-buffer, without padding (for mmap). */
+#define RING_BUFFER_COMPAT_GET_SUBBUF_SIZE     _IOR(0xF6, 0x07, compat_ulong_t)
+/* returns the size of the current sub-buffer, with padding (for splice). */
+#define RING_BUFFER_COMPAT_GET_PADDED_SUBBUF_SIZE \
+       _IOR(0xF6, 0x08, compat_ulong_t)
+/* returns the maximum size for sub-buffers. */
+#define RING_BUFFER_COMPAT_GET_MAX_SUBBUF_SIZE _IOR(0xF6, 0x09, compat_ulong_t)
+/* returns the length to mmap. */
+#define RING_BUFFER_COMPAT_GET_MMAP_LEN                _IOR(0xF6, 0x0A, compat_ulong_t)
+/* returns the offset of the subbuffer belonging to the mmap reader. */
+#define RING_BUFFER_COMPAT_GET_MMAP_READ_OFFSET        _IOR(0xF6, 0x0B, compat_ulong_t)
+/* flush the current sub-buffer */
+#define RING_BUFFER_COMPAT_FLUSH               RING_BUFFER_FLUSH
+#endif /* CONFIG_COMPAT */
 
-#endif /* _LINUX_RING_BUFFER_VFS_H */
+#endif /* _LIB_RING_BUFFER_VFS_H */