1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "utility.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "super_vbmeta_format.h"
using android::base::ErrnoError;
using android::base::Error;
using android::base::Result;
namespace android {
namespace fs_mgr {
Result<uint64_t> GetFileSize(int fd) {
struct stat sb;
if (fstat(fd, &sb) == -1) {
return ErrnoError() << "Couldn't get the file size";
}
return sb.st_size;
}
uint64_t IndexOffset(const uint8_t vbmeta_index) {
/* There are primary and backup vbmeta table in super_vbmeta,
so SUPER_VBMETA_TABLE_MAX_SIZE is counted twice. */
return 2 * SUPER_VBMETA_TABLE_MAX_SIZE + vbmeta_index * VBMETA_IMAGE_MAX_SIZE;
}
} // namespace fs_mgr
} // namespace android
|
