/root/bitcoin/src/flatfile.cpp
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1 | | // Copyright (c) 2009-2010 Satoshi Nakamoto |
2 | | // Copyright (c) 2009-present The Bitcoin Core developers |
3 | | // Distributed under the MIT software license, see the accompanying |
4 | | // file COPYING or http://www.opensource.org/licenses/mit-license.php. |
5 | | |
6 | | #include <flatfile.h> |
7 | | |
8 | | #include <tinyformat.h> |
9 | | #include <util/fs_helpers.h> |
10 | | #include <util/log.h> |
11 | | #include <util/overflow.h> |
12 | | |
13 | | #include <stdexcept> |
14 | | |
15 | | FlatFileSeq::FlatFileSeq(fs::path dir, const char* prefix, size_t chunk_size) : |
16 | 6.28k | m_dir(std::move(dir)), |
17 | 6.28k | m_prefix(prefix), |
18 | 6.28k | m_chunk_size(chunk_size) |
19 | 6.28k | { |
20 | 6.28k | if (chunk_size == 0) { Branch (20:9): [True: 0, False: 6.28k]
|
21 | 0 | throw std::invalid_argument("chunk_size must be positive"); |
22 | 0 | } |
23 | 6.28k | } |
24 | | |
25 | | std::string FlatFilePos::ToString() const |
26 | 14.8k | { |
27 | 14.8k | return strprintf("FlatFilePos(nFile=%i, nPos=%i)", nFile, nPos); |
28 | 14.8k | } |
29 | | |
30 | | fs::path FlatFileSeq::FileName(const FlatFilePos& pos) const |
31 | 967k | { |
32 | 967k | return m_dir / fs::u8path(strprintf("%s%05u.dat", m_prefix, pos.nFile)); |
33 | 967k | } |
34 | | |
35 | | FILE* FlatFileSeq::Open(const FlatFilePos& pos, bool read_only) const |
36 | 982k | { |
37 | 982k | if (pos.IsNull()) { Branch (37:9): [True: 14.8k, False: 967k]
|
38 | 14.8k | return nullptr; |
39 | 14.8k | } |
40 | 967k | fs::path path = FileName(pos); |
41 | 967k | fs::create_directories(path.parent_path()); |
42 | 967k | FILE* file = fsbridge::fopen(path, read_only ? "rb": "rb+"); Branch (42:40): [True: 6.25k, False: 961k]
|
43 | 967k | if (!file && !read_only) Branch (43:9): [True: 2.75k, False: 964k]
Branch (43:18): [True: 2.75k, False: 0]
|
44 | 2.75k | file = fsbridge::fopen(path, "wb+"); |
45 | 967k | if (!file) { Branch (45:9): [True: 0, False: 967k]
|
46 | 0 | LogError("Unable to open file %s", fs::PathToString(path)); |
47 | 0 | return nullptr; |
48 | 0 | } |
49 | 967k | if (pos.nPos && fseek(file, pos.nPos, SEEK_SET)) { Branch (49:9): [True: 689k, False: 277k]
Branch (49:21): [True: 0, False: 689k]
|
50 | 0 | LogError("Unable to seek to position %u of %s", pos.nPos, fs::PathToString(path)); |
51 | 0 | if (fclose(file) != 0) { Branch (51:13): [True: 0, False: 0]
|
52 | 0 | LogError("Unable to close file %s", fs::PathToString(path)); |
53 | 0 | } |
54 | 0 | return nullptr; |
55 | 0 | } |
56 | 967k | return file; |
57 | 967k | } |
58 | | |
59 | | size_t FlatFileSeq::Allocate(const FlatFilePos& pos, size_t add_size, bool& out_of_space) const |
60 | 695k | { |
61 | 695k | out_of_space = false; |
62 | | |
63 | 695k | unsigned int n_old_chunks = CeilDiv(pos.nPos, m_chunk_size); |
64 | 695k | unsigned int n_new_chunks = CeilDiv(pos.nPos + add_size, m_chunk_size); |
65 | 695k | if (n_new_chunks > n_old_chunks) { Branch (65:9): [True: 5.74k, False: 689k]
|
66 | 5.74k | size_t old_size = pos.nPos; |
67 | 5.74k | size_t new_size = n_new_chunks * m_chunk_size; |
68 | 5.74k | size_t inc_size = new_size - old_size; |
69 | | |
70 | 5.74k | if (CheckDiskSpace(m_dir, inc_size)) { Branch (70:13): [True: 5.74k, False: 0]
|
71 | 5.74k | FILE *file = Open(pos); |
72 | 5.74k | if (file) { Branch (72:17): [True: 5.74k, False: 0]
|
73 | 5.74k | LogDebug(BCLog::VALIDATION, "Pre-allocating up to position 0x%x in %s%05u.dat\n", new_size, m_prefix, pos.nFile); |
74 | 5.74k | AllocateFileRange(file, pos.nPos, inc_size); |
75 | 5.74k | if (fclose(file) != 0) { Branch (75:21): [True: 0, False: 5.74k]
|
76 | 0 | LogError("Cannot close file %s%05u.dat after extending it with %u bytes", m_prefix, pos.nFile, new_size); |
77 | 0 | return 0; |
78 | 0 | } |
79 | 5.74k | return inc_size; |
80 | 5.74k | } |
81 | 5.74k | } else { |
82 | 0 | out_of_space = true; |
83 | 0 | } |
84 | 5.74k | } |
85 | 689k | return 0; |
86 | 695k | } |
87 | | |
88 | | bool FlatFileSeq::Flush(const FlatFilePos& pos, bool finalize) const |
89 | 259k | { |
90 | 259k | FILE* file = Open(FlatFilePos(pos.nFile, 0)); // Avoid fseek to nPos |
91 | 259k | if (!file) { Branch (91:9): [True: 0, False: 259k]
|
92 | 0 | LogError("%s: failed to open file %d\n", __func__, pos.nFile); |
93 | 0 | return false; |
94 | 0 | } |
95 | 259k | if (finalize && !TruncateFile(file, pos.nPos)) { Branch (95:9): [True: 0, False: 259k]
Branch (95:21): [True: 0, False: 0]
|
96 | 0 | LogError("%s: failed to truncate file %d\n", __func__, pos.nFile); |
97 | 0 | if (fclose(file) != 0) { Branch (97:13): [True: 0, False: 0]
|
98 | 0 | LogError("Failed to close file %d", pos.nFile); |
99 | 0 | } |
100 | 0 | return false; |
101 | 0 | } |
102 | 259k | if (!FileCommit(file)) { Branch (102:9): [True: 0, False: 259k]
|
103 | 0 | LogError("%s: failed to commit file %d\n", __func__, pos.nFile); |
104 | 0 | if (fclose(file) != 0) { Branch (104:13): [True: 0, False: 0]
|
105 | 0 | LogError("Failed to close file %d", pos.nFile); |
106 | 0 | } |
107 | 0 | return false; |
108 | 0 | } |
109 | 259k | DirectoryCommit(m_dir); |
110 | | |
111 | 259k | if (fclose(file) != 0) { Branch (111:9): [True: 0, False: 259k]
|
112 | 0 | LogError("Failed to close file %d after flush", pos.nFile); |
113 | 0 | return false; |
114 | 0 | } |
115 | 259k | return true; |
116 | 259k | } |