-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
* ring_buffer_splice.c
*
* Copyright (C) 2002-2005 - Tom Zanussi <zanussi@us.ibm.com>, IBM Corp
* Copyright (C) 1999-2005 - Karim Yaghmour <karim@opersys.com>
* 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
- *
* Re-using code from kernel/relay.c, which is why it is licensed under
- * the GPLv2.
+ * the GPL-2.0.
*/
#include <linux/module.h>
#include <linux/fs.h>
+#include <lttng-kernel-version.h>
-#include "../../wrapper/splice.h"
-#include "../../wrapper/ringbuffer/backend.h"
-#include "../../wrapper/ringbuffer/frontend.h"
-#include "../../wrapper/ringbuffer/vfs.h"
+#include <wrapper/splice.h>
+#include <wrapper/ringbuffer/backend.h>
+#include <wrapper/ringbuffer/frontend.h>
+#include <wrapper/ringbuffer/vfs.h>
#if 0
#define printk_dbg(fmt, args...) printk(fmt, args)
__free_page(pbuf->page);
}
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,8,0))
+static const struct pipe_buf_operations ring_buffer_pipe_buf_ops = {
+ .release = lib_ring_buffer_pipe_buf_release,
+ .try_steal = generic_pipe_buf_try_steal,
+ .get = generic_pipe_buf_get
+};
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,1,0))
+static const struct pipe_buf_operations ring_buffer_pipe_buf_ops = {
+ .confirm = generic_pipe_buf_confirm,
+ .release = lib_ring_buffer_pipe_buf_release,
+ .steal = generic_pipe_buf_steal,
+ .get = generic_pipe_buf_get
+};
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,15,0))
+static const struct pipe_buf_operations ring_buffer_pipe_buf_ops = {
+ .can_merge = 0,
+ .confirm = generic_pipe_buf_confirm,
+ .release = lib_ring_buffer_pipe_buf_release,
+ .steal = generic_pipe_buf_steal,
+ .get = generic_pipe_buf_get
+};
+#else
static const struct pipe_buf_operations ring_buffer_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.confirm = generic_pipe_buf_confirm,
.release = lib_ring_buffer_pipe_buf_release,
.steal = generic_pipe_buf_steal,
- .get = generic_pipe_buf_get,
+ .get = generic_pipe_buf_get
};
+#endif
/*
* Page release operation after splice pipe_to_file ends.
.pages = pages,
.nr_pages = 0,
.partial = partial,
+#if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(4,12,0))
.flags = flags,
+#endif
.ops = &ring_buffer_pipe_buf_ops,
.spd_release = lib_ring_buffer_page_release,
};
for (; spd.nr_pages < nr_pages; spd.nr_pages++) {
unsigned int this_len;
- struct page **page, *new_page;
+ unsigned long *pfnp, new_pfn;
+ struct page *new_page;
void **virt;
if (!len)
GFP_KERNEL | __GFP_ZERO, 0);
if (!new_page)
break;
-
+ new_pfn = page_to_pfn(new_page);
this_len = PAGE_SIZE - poff;
- page = lib_ring_buffer_read_get_page(&buf->backend, roffset, &virt);
- spd.pages[spd.nr_pages] = *page;
- *page = new_page;
+ pfnp = lib_ring_buffer_read_get_pfn(&buf->backend, roffset, &virt);
+ spd.pages[spd.nr_pages] = pfn_to_page(*pfnp);
+ *pfnp = new_pfn;
*virt = page_address(new_page);
spd.partial[spd.nr_pages].offset = poff;
spd.partial[spd.nr_pages].len = this_len;