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/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
*
* wrapper/fs.h
*
* Copyright (C) 2020 Michael Jeanson <mjeanson@efficios.com>
*/
#ifndef _LTTNG_WRAPPER_FS_H
#define _LTTNG_WRAPPER_FS_H
#include <linux/fs.h>
#include <lttng/kernel-version.h>
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,14,0))
static inline
ssize_t lttng_kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
{
return kernel_read(file, buf, count, pos);
}
#else /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,14,0) */
static inline
ssize_t lttng_kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
{
ssize_t len;
len = kernel_read(file, *pos, buf, count);
/*
* Move 'pos' forward since it's passed by value in this
* implementation of 'kernel_read'.
*/
if (len > 0)
(*pos) += len;
return len;
}
#endif /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,14,0) */
#endif /* _LTTNG_WRAPPER_FS_H */
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