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Jiyong Park86c9b082021-06-04 19:03:48 +09001/*
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17use bitflags::bitflags;
18
19// This UAPI is copied and converted from include/uapi/linux/loop.h Note that this module doesn't
20// implement all the features introduced in loop(4). Only the features that are required to support
21// the `apkdmverity` use cases are implemented.
22
23pub const LOOP_CONTROL: &str = "/dev/loop-control";
24
25pub const LOOP_CTL_GET_FREE: libc::c_ulong = 0x4C82;
26pub const LOOP_CONFIGURE: libc::c_ulong = 0x4C0A;
Jiyong Park99a35b82021-06-07 10:13:44 +090027#[cfg(test)]
Jiyong Park86c9b082021-06-04 19:03:48 +090028pub const LOOP_CLR_FD: libc::c_ulong = 0x4C01;
29
30#[repr(C)]
31pub struct loop_config {
32 pub fd: u32,
33 pub block_size: u32,
34 pub info: loop_info64,
35 pub reserved: [u64; 8],
36}
37
38#[repr(C)]
39pub struct loop_info64 {
40 pub lo_device: u64,
41 pub lo_inode: u64,
42 pub lo_rdevice: u64,
43 pub lo_offset: u64,
44 pub lo_sizelimit: u64,
45 pub lo_number: u32,
46 pub lo_encrypt_type: u32,
47 pub lo_encrypt_key_size: u32,
48 pub lo_flags: Flag,
49 pub lo_file_name: [u8; LO_NAME_SIZE],
50 pub lo_crypt_name: [u8; LO_NAME_SIZE],
51 pub lo_encrypt_key: [u8; LO_KEY_SIZE],
52 pub lo_init: [u64; 2],
53}
54
55bitflags! {
56 pub struct Flag: u32 {
57 const LO_FLAGS_READ_ONLY = 1 << 0;
58 const LO_FLAGS_AUTOCLEAR = 1 << 2;
59 const LO_FLAGS_PARTSCAN = 1 << 3;
60 const LO_FLAGS_DIRECT_IO = 1 << 4;
61 }
62}
63
64pub const LO_NAME_SIZE: usize = 64;
65pub const LO_KEY_SIZE: usize = 32;