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/* 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) \
id(UNKNOWN, unknown) \
id(FIRMWARE, firmware) \
id(MODULE, kernel-module) \
id(KEXEC_IMAGE, kexec-image) \
id(KEXEC_INITRAMFS, kexec-initramfs) \
id(POLICY, security-policy) \
id(X509_CERTIFICATE, x509-certificate) \
id(MAX_ID, )
#define __fid_enumify(ENUM, dummy) READING_ ## ENUM,
#define __fid_stringify(dummy, str) #str,
enum kernel_read_file_id {
__kernel_read_file_id(__fid_enumify)
};
static const char * const kernel_read_file_str[] = {
__kernel_read_file_id(__fid_stringify)
};
static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
{
if ((unsigned int)id >= READING_MAX_ID)
return kernel_read_file_str[READING_UNKNOWN];
return kernel_read_file_str[id];
}
int 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);
int 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);
int 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);
int 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 */