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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * fs-verity user API
4 *
5 * These ioctls can be used on filesystems that support fs-verity. See the
6 * "User API" section of Documentation/filesystems/fsverity.rst.
7 *
8 * Copyright 2019 Google LLC
9 */
10#ifndef _UAPI_LINUX_FSVERITY_H
11#define _UAPI_LINUX_FSVERITY_H
12
13#include <linux/ioctl.h>
14#include <linux/types.h>
15
16#define FS_VERITY_HASH_ALG_SHA256 1
17#define FS_VERITY_HASH_ALG_SHA512 2
18
19struct fsverity_enable_arg {
20 __u32 version;
21 __u32 hash_algorithm;
22 __u32 block_size;
23 __u32 salt_size;
24 __u64 salt_ptr;
25 __u32 sig_size;
26 __u32 __reserved1;
27 __u64 sig_ptr;
28 __u64 __reserved2[11];
29};
30
31struct fsverity_digest {
32 __u16 digest_algorithm;
33 __u16 digest_size; /* input/output */
34 __u8 digest[];
35};
36
37#define FS_IOC_ENABLE_VERITY _IOW('f', 133, struct fsverity_enable_arg)
38#define FS_IOC_MEASURE_VERITY _IOWR('f', 134, struct fsverity_digest)
39
40#endif /* _UAPI_LINUX_FSVERITY_H */