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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "DirectoryMetadata.h"
#include "mozilla/Result.h"
#include "mozilla/TypedEnumBits.h"
#include "mozilla/dom/quota/Assertions.h"
#include "mozilla/dom/quota/CommonMetadata.h"
#include "mozilla/dom/quota/QuotaCommon.h"
#include "mozilla/dom/quota/ResultExtensions.h"
#include "mozilla/dom/quota/StreamUtils.h"
#include "nsIBinaryInputStream.h"
#include "nsIBinaryOutputStream.h"
namespace mozilla::dom::quota {
// clang-format off
enum class DirectoryMetadataFlags : uint32_t {
None = 0,
Initialized = 1 << 0,
Accessed = 1 << 1,
};
// clang-format on
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(DirectoryMetadataFlags)
Result<OriginStateMetadata, nsresult> ReadDirectoryMetadataHeader(
nsIBinaryInputStream& aStream) {
AssertIsOnIOThread();
OriginStateMetadata originStateMetadata;
QM_TRY_UNWRAP(originStateMetadata.mLastAccessTime,
MOZ_TO_RESULT_INVOKE_MEMBER(aStream, Read64));
QM_TRY_UNWRAP(originStateMetadata.mPersisted,
MOZ_TO_RESULT_INVOKE_MEMBER(aStream, ReadBoolean));
QM_TRY_INSPECT(const uint32_t& rawFlags,
MOZ_TO_RESULT_INVOKE_MEMBER(aStream, Read32));
auto flags = static_cast<DirectoryMetadataFlags>(rawFlags);
// If DirectoryMetadataFlags::Initialized is not set, the flags field
// contains no valid data. Since mAccessed indicates whether a full scan must
// be done during initialization, we conservatively set it to true when the
// access state is unknown.
originStateMetadata.mAccessed =
rawFlags == 0 || (flags & DirectoryMetadataFlags::Accessed) !=
DirectoryMetadataFlags::None;
QM_TRY_UNWRAP(originStateMetadata.mLastMaintenanceDate,
MOZ_TO_RESULT_INVOKE_MEMBER(aStream, Read32));
return originStateMetadata;
}
nsresult WriteDirectoryMetadataHeader(
nsIBinaryOutputStream& aStream,
const OriginStateMetadata& aOriginStateMetadata) {
AssertIsOnIOThread();
QM_TRY(MOZ_TO_RESULT(aStream.Write64(aOriginStateMetadata.mLastAccessTime)));
QM_TRY(MOZ_TO_RESULT(aStream.WriteBoolean(aOriginStateMetadata.mPersisted)));
// Always set DirectoryMetadataFlags::Initialized when writing new metadata,
// to mark the flags field as valid. This distinguishes real flags from older
// files where the field was reserved and always written as zero.
auto flags =
DirectoryMetadataFlags::Initialized |
(aOriginStateMetadata.mAccessed ? DirectoryMetadataFlags::Accessed
: DirectoryMetadataFlags::None);
auto rawFlags = static_cast<uint32_t>(flags);
QM_TRY(MOZ_TO_RESULT(aStream.Write32(rawFlags)));
QM_TRY(MOZ_TO_RESULT(
aStream.Write32(aOriginStateMetadata.mLastMaintenanceDate)));
return NS_OK;
}
Result<OriginStateMetadata, nsresult> LoadDirectoryMetadataHeader(
nsIFile& aDirectory) {
AssertIsOnIOThread();
QM_TRY_INSPECT(
const auto& stream,
GetBinaryInputStream(aDirectory, nsLiteralString(METADATA_V2_FILE_NAME)));
QM_TRY_INSPECT(const OriginStateMetadata& originStateMetadata,
ReadDirectoryMetadataHeader(*stream));
QM_TRY(MOZ_TO_RESULT(stream->Close()));
return originStateMetadata;
}
nsresult SaveDirectoryMetadataHeader(
nsIFile& aDirectory, const OriginStateMetadata& aOriginStateMetadata) {
AssertIsOnIOThread();
QM_TRY_INSPECT(
const auto& file,
CloneFileAndAppend(aDirectory, nsLiteralString(METADATA_V2_FILE_NAME)));
QM_TRY_INSPECT(const auto& stream,
GetBinaryOutputStream(*file, FileFlag::Update));
MOZ_ASSERT(stream);
QM_TRY(MOZ_TO_RESULT(
WriteDirectoryMetadataHeader(*stream, aOriginStateMetadata)));
QM_TRY(MOZ_TO_RESULT(stream->Flush()));
QM_TRY(MOZ_TO_RESULT(stream->Close()));
return NS_OK;
}
} // namespace mozilla::dom::quota
|
