Cleanup: Move lib/ringbuffer/ headers to include/ringbuffer/

[lttng-modules.git] / lib / ringbuffer / ring_buffer_vfs.c

diff --git a/lib/ringbuffer/ring_buffer_vfs.c b/lib/ringbuffer/ring_buffer_vfs.c
index 15da212d3fa313e3b3a027b2638132cacbb1db40..2be550c41ddaa8a662bc6c0ac32f5aa35bd37e20 100644 (file)
--- a/lib/ringbuffer/ring_buffer_vfs.c
+++ b/lib/ringbuffer/ring_buffer_vfs.c
@@ -1,32 +1,19 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
+ *
  * ring_buffer_vfs.c
  *
  * Ring Buffer VFS file operations.
  *
  * Copyright (C) 2010-2012 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/module.h>
 #include <linux/fs.h>
 #include <linux/compat.h>
 
-#include <wrapper/ringbuffer/backend.h>
-#include <wrapper/ringbuffer/frontend.h>
-#include <wrapper/ringbuffer/vfs.h>
+#include <ringbuffer/backend.h>
+#include <ringbuffer/frontend.h>
+#include <ringbuffer/vfs.h>
 #include <wrapper/poll.h>
 #include <lttng-tracer.h>
 
@@ -191,17 +178,11 @@ long lib_ring_buffer_ioctl(struct file *filp, unsigned int cmd,
 
        switch (cmd) {
        case RING_BUFFER_SNAPSHOT:
-               /*
-                * First, ensure we perform a "final" flush onto the
-                * stream.  This will ensure we create a packet of
-                * padding if we encounter an empty packet. This ensures
-                * the time-stamps right before the snapshot is used as
-                * end of packet timestamp.
-                */
-               if (!buf->quiescent)
-                       lib_ring_buffer_switch_remote_empty(buf);
                return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot,
                                            &buf->prod_snapshot);
+       case RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS:
+               return lib_ring_buffer_snapshot_sample_positions(buf,
+                               &buf->cons_snapshot, &buf->prod_snapshot);
        case RING_BUFFER_SNAPSHOT_GET_CONSUMED:
                return put_ulong(buf->cons_snapshot, arg);
        case RING_BUFFER_SNAPSHOT_GET_PRODUCED:
@@ -279,6 +260,12 @@ long lib_ring_buffer_ioctl(struct file *filp, unsigned int cmd,
        case RING_BUFFER_FLUSH:
                lib_ring_buffer_switch_remote(buf);
                return 0;
+       case RING_BUFFER_FLUSH_EMPTY:
+               lib_ring_buffer_switch_remote_empty(buf);
+               return 0;
+       case RING_BUFFER_CLEAR:
+               lib_ring_buffer_clear(buf);
+               return 0;
        default:
                return -ENOIOCTLCMD;
        }
@@ -329,17 +316,11 @@ long lib_ring_buffer_compat_ioctl(struct file *filp, unsigned int cmd,
 
        switch (cmd) {
        case RING_BUFFER_COMPAT_SNAPSHOT:
-               /*
-                * First, ensure we perform a "final" flush onto the
-                * stream.  This will ensure we create a packet of
-                * padding if we encounter an empty packet. This ensures
-                * the time-stamps right before the snapshot is used as
-                * end of packet timestamp.
-                */
-               if (!buf->quiescent)
-                       lib_ring_buffer_switch_remote_empty(buf);
                return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot,
                                                &buf->prod_snapshot);
+       case RING_BUFFER_COMPAT_SNAPSHOT_SAMPLE_POSITIONS:
+               return lib_ring_buffer_snapshot_sample_positions(buf,
+                               &buf->cons_snapshot, &buf->prod_snapshot);
        case RING_BUFFER_COMPAT_SNAPSHOT_GET_CONSUMED:
                return compat_put_ulong(buf->cons_snapshot, arg);
        case RING_BUFFER_COMPAT_SNAPSHOT_GET_PRODUCED:
@@ -433,6 +414,12 @@ long lib_ring_buffer_compat_ioctl(struct file *filp, unsigned int cmd,
        case RING_BUFFER_COMPAT_FLUSH:
                lib_ring_buffer_switch_remote(buf);
                return 0;
+       case RING_BUFFER_COMPAT_FLUSH_EMPTY:
+               lib_ring_buffer_switch_remote_empty(buf);
+               return 0;
+       case RING_BUFFER_COMPAT_CLEAR:
+               lib_ring_buffer_clear(buf);
+               return 0;
        default:
                return -ENOIOCTLCMD;
        }
@@ -465,8 +452,8 @@ const struct file_operations lib_ring_buffer_file_operations = {
 EXPORT_SYMBOL_GPL(lib_ring_buffer_file_operations);
 
 MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Ring Buffer Library VFS");
+MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
+MODULE_DESCRIPTION("LTTng ring buffer library");
 MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
        __stringify(LTTNG_MODULES_MINOR_VERSION) "."
        __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)