1 /****************************************************************************
2  ****************************************************************************
3  ***
4  ***   This header was automatically generated from a Linux kernel header
5  ***   of the same name, to make information necessary for userspace to
6  ***   call into the kernel available to libc.  It contains only constants,
7  ***   structures, and macros generated from the original header, and thus,
8  ***   contains no copyrightable information.
9  ***
10  ***   To edit the content of this header, modify the corresponding
11  ***   source file (e.g. under external/kernel-headers/original/) then
12  ***   run bionic/libc/kernel/tools/update_all.py
13  ***
14  ***   Any manual change here will be lost the next time this script will
15  ***   be run. You've been warned!
16  ***
17  ****************************************************************************
18  ****************************************************************************/
19 #ifndef _UAPI_LINUX_FSVERITY_H
20 #define _UAPI_LINUX_FSVERITY_H
21 #include <linux/ioctl.h>
22 #include <linux/types.h>
23 #define FS_VERITY_HASH_ALG_SHA256 1
24 #define FS_VERITY_HASH_ALG_SHA512 2
25 struct fsverity_enable_arg {
26   __u32 version;
27   __u32 hash_algorithm;
28   __u32 block_size;
29   __u32 salt_size;
30   __u64 salt_ptr;
31   __u32 sig_size;
32   __u32 __reserved1;
33   __u64 sig_ptr;
34   __u64 __reserved2[11];
35 };
36 struct fsverity_digest {
37   __u16 digest_algorithm;
38   __u16 digest_size;
39   __u8 digest[];
40 };
41 struct fsverity_descriptor {
42   __u8 version;
43   __u8 hash_algorithm;
44   __u8 log_blocksize;
45   __u8 salt_size;
46   __le32 __reserved_0x04;
47   __le64 data_size;
48   __u8 root_hash[64];
49   __u8 salt[32];
50   __u8 __reserved[144];
51 };
52 struct fsverity_formatted_digest {
53   char magic[8];
54   __le16 digest_algorithm;
55   __le16 digest_size;
56   __u8 digest[];
57 };
58 #define FS_VERITY_METADATA_TYPE_MERKLE_TREE 1
59 #define FS_VERITY_METADATA_TYPE_DESCRIPTOR 2
60 #define FS_VERITY_METADATA_TYPE_SIGNATURE 3
61 struct fsverity_read_metadata_arg {
62   __u64 metadata_type;
63   __u64 offset;
64   __u64 length;
65   __u64 buf_ptr;
66   __u64 __reserved;
67 };
68 #define FS_IOC_ENABLE_VERITY _IOW('f', 133, struct fsverity_enable_arg)
69 #define FS_IOC_MEASURE_VERITY _IOWR('f', 134, struct fsverity_digest)
70 #define FS_IOC_READ_VERITY_METADATA _IOWR('f', 135, struct fsverity_read_metadata_arg)
71 #endif
72