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b89999d0 SB |
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(MAX_ID, ) | |
18 | ||
19 | #define __fid_enumify(ENUM, dummy) READING_ ## ENUM, | |
20 | #define __fid_stringify(dummy, str) #str, | |
21 | ||
22 | enum kernel_read_file_id { | |
23 | __kernel_read_file_id(__fid_enumify) | |
24 | }; | |
25 | ||
26 | static const char * const kernel_read_file_str[] = { | |
27 | __kernel_read_file_id(__fid_stringify) | |
28 | }; | |
29 | ||
30 | static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id) | |
31 | { | |
32 | if ((unsigned int)id >= READING_MAX_ID) | |
33 | return kernel_read_file_str[READING_UNKNOWN]; | |
34 | ||
35 | return kernel_read_file_str[id]; | |
36 | } | |
37 | ||
dabba872 PT |
38 | ssize_t kernel_read_file(struct file *file, loff_t offset, |
39 | void **buf, size_t buf_size, | |
40 | size_t *file_size, | |
41 | enum kernel_read_file_id id); | |
42 | ssize_t kernel_read_file_from_path(const char *path, loff_t offset, | |
43 | void **buf, size_t buf_size, | |
44 | size_t *file_size, | |
45 | enum kernel_read_file_id id); | |
46 | ssize_t kernel_read_file_from_path_initns(const char *path, loff_t offset, | |
47 | void **buf, size_t buf_size, | |
48 | size_t *file_size, | |
49 | enum kernel_read_file_id id); | |
50 | ssize_t kernel_read_file_from_fd(int fd, loff_t offset, | |
51 | void **buf, size_t buf_size, | |
52 | size_t *file_size, | |
53 | enum kernel_read_file_id id); | |
b89999d0 SB |
54 | |
55 | #endif /* _LINUX_KERNEL_READ_FILE_H */ |