blob: 4d4c360dc5ef9280fd82d15d67be263539788375 (
plain)
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
48
49
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/crypto/CryptoImageDispatch.h"
namespace librbd {
namespace crypto {
CryptoImageDispatch::CryptoImageDispatch(
uint64_t data_offset) : m_data_offset(data_offset) {
}
void CryptoImageDispatch::remap_to_physical(io::Extents& image_extents,
io::ImageArea area) {
switch (area) {
case io::ImageArea::DATA:
for (auto& [off, _] : image_extents) {
off += m_data_offset;
}
break;
case io::ImageArea::CRYPTO_HEADER:
// direct mapping
break;
default:
ceph_abort();
}
}
io::ImageArea CryptoImageDispatch::remap_to_logical(
io::Extents& image_extents) {
bool saw_data = false;
bool saw_crypto_header = false;
for (auto& [off, _] : image_extents) {
if (off >= m_data_offset) {
off -= m_data_offset;
saw_data = true;
} else {
saw_crypto_header = true;
}
}
if (saw_crypto_header) {
ceph_assert(!saw_data);
return io::ImageArea::CRYPTO_HEADER;
}
return io::ImageArea::DATA;
}
} // namespace crypto
} // namespace librbd
|
