Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_KERNEL_READ_FILE_H
3#define _LINUX_KERNEL_READ_FILE_H
4
5#include <linux/file.h>
6#include <linux/types.h>
7
8/* This is a list of *what* is being read, not *how* nor *where*. */
9#define __kernel_read_file_id(id) \
10 id(UNKNOWN, unknown) \
11 id(FIRMWARE, firmware) \
12 id(MODULE, kernel-module) \
13 id(KEXEC_IMAGE, kexec-image) \
14 id(KEXEC_INITRAMFS, kexec-initramfs) \
15 id(POLICY, security-policy) \
16 id(X509_CERTIFICATE, x509-certificate) \
17 id(MODULE_COMPRESSED, kernel-module-compressed) \
18 id(MAX_ID, )
19
20#define __fid_enumify(ENUM, dummy) READING_ ## ENUM,
21#define __fid_stringify(dummy, str) #str,
22
23enum kernel_read_file_id {
24 __kernel_read_file_id(__fid_enumify)
25};
26
27static const char * const kernel_read_file_str[] = {
28 __kernel_read_file_id(__fid_stringify)
29};
30
31static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
32{
33 if ((unsigned int)id >= READING_MAX_ID)
34 return kernel_read_file_str[READING_UNKNOWN];
35
36 return kernel_read_file_str[id];
37}
38
39ssize_t kernel_read_file(struct file *file, loff_t offset,
40 void **buf, size_t buf_size,
41 size_t *file_size,
42 enum kernel_read_file_id id);
43ssize_t kernel_read_file_from_path(const char *path, loff_t offset,
44 void **buf, size_t buf_size,
45 size_t *file_size,
46 enum kernel_read_file_id id);
47ssize_t kernel_read_file_from_path_initns(const char *path, loff_t offset,
48 void **buf, size_t buf_size,
49 size_t *file_size,
50 enum kernel_read_file_id id);
51ssize_t kernel_read_file_from_fd(int fd, loff_t offset,
52 void **buf, size_t buf_size,
53 size_t *file_size,
54 enum kernel_read_file_id id);
55
56#endif /* _LINUX_KERNEL_READ_FILE_H */