linux/include/linux/kernel_read_file.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KERNEL_READ_FILE_H
#define _LINUX_KERNEL_READ_FILE_H

#include <linux/file.h>
#include <linux/types.h>

/* This is a list of *what* is being read, not *how* nor *where*. */
#define __kernel_read_file_id(id) …

#define __fid_enumify(ENUM, dummy) …
#define __fid_stringify(dummy, str) …

enum kernel_read_file_id { … };

static const char * const kernel_read_file_str[] = …;

static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
{ … }

ssize_t kernel_read_file(struct file *file, loff_t offset,
			 void **buf, size_t buf_size,
			 size_t *file_size,
			 enum kernel_read_file_id id);
ssize_t kernel_read_file_from_path(const char *path, loff_t offset,
				   void **buf, size_t buf_size,
				   size_t *file_size,
				   enum kernel_read_file_id id);
ssize_t kernel_read_file_from_path_initns(const char *path, loff_t offset,
					  void **buf, size_t buf_size,
					  size_t *file_size,
					  enum kernel_read_file_id id);
ssize_t kernel_read_file_from_fd(int fd, loff_t offset,
				 void **buf, size_t buf_size,
				 size_t *file_size,
				 enum kernel_read_file_id id);

#endif /* _LINUX_KERNEL_READ_FILE_H */