GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/cache_tiered.cc
Date: 2026-05-19 11:45:12
Exec Total Coverage
Lines: 82 129 63.6%
Branches: 52 132 39.4%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #include "cache_tiered.h"
6
7 #include <errno.h>
8
9 #include <string>
10 #include <vector>
11
12 #include "util/posix.h" // IWYU pragma: keep
13
14
15 ✗ std::string TieredCacheManager::Describe() {
16 return "Tiered Cache\n"
17 " - upper layer: "
18 ✗ + upper_->Describe() + " - lower layer: " + lower_->Describe();
19 }
20
21
22 ✗ bool TieredCacheManager::DoFreeState(void *data) {
23 ✗ SavedState *state = reinterpret_cast<SavedState *>(data);
24 ✗ upper_->FreeState(-1, state->state_upper);
25 ✗ lower_->FreeState(-1, state->state_lower);
26 ✗ delete state;
27 ✗ return true;
28 }
29
30
31 ✗ int TieredCacheManager::DoRestoreState(void *data) {
32 ✗ SavedState *state = reinterpret_cast<SavedState *>(data);
33 ✗ const int new_root_fd = upper_->RestoreState(-1, state->state_upper);
34 // The lower cache layer does not keep the root catalog open
35 ✗ const int retval = lower_->RestoreState(-1, state->state_lower);
36 ✗ assert(retval == -1);
37 ✗ return new_root_fd;
38 }
39
40
41 ✗ void *TieredCacheManager::DoSaveState() {
42 ✗ SavedState *state = new SavedState();
43 ✗ state->state_upper = upper_->SaveState(-1);
44 ✗ state->state_lower = lower_->SaveState(-1);
45 ✗ return state;
46 }
47
48
49 168 int TieredCacheManager::Open(const LabeledObject &object) {
50
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 168 const int fd = upper_->Open(object);
51
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 168 if ((fd >= 0) || (fd != -ENOENT)) {
52 28 return fd;
53 }
54
55
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 140 const int fd2 = lower_->Open(object);
56
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 140 if (fd2 < 0) {
57 112 return fd;
58 } // NOTE: use error code from upper.
59
60 // Lower cache hit; upper cache miss. Copy object into the upper cache.
61
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 28 const int64_t size = lower_->GetSize(fd2);
62
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 28 if (size < 0) {
63 ✗ lower_->Close(fd2);
64 ✗ return fd;
65 }
66
67
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 28 void *txn = alloca(upper_->SizeOfTxn());
68
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 28 if (upper_->StartTxn(object.id, size, txn) < 0) {
69 ✗ lower_->Close(fd2);
70 ✗ return fd;
71 }
72
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 28 upper_->CtrlTxn(object.label, 0, txn);
73
74 28 std::vector<char> m_buffer;
75
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 28 m_buffer.resize(kCopyBufferSize);
76 28 uint64_t remaining = size;
77 28 uint64_t offset = 0;
78
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 56 while (remaining > 0) {
79 28 const unsigned nbytes = remaining > kCopyBufferSize ? kCopyBufferSize
80 : remaining;
81
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 28 int64_t result = lower_->Pread(fd2, &m_buffer[0], nbytes, offset);
82 // The file we are reading is supposed to be exactly `size` bytes.
83
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 28 if ((result < 0) || (result != nbytes)) {
84 ✗ lower_->Close(fd2);
85 ✗ upper_->AbortTxn(txn);
86 ✗ return fd;
87 }
88
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 28 result = upper_->Write(&m_buffer[0], nbytes, txn);
89
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 28 if (result < 0) {
90 ✗ lower_->Close(fd2);
91 ✗ upper_->AbortTxn(txn);
92 ✗ return fd;
93 }
94 28 offset += nbytes;
95 28 remaining -= nbytes;
96 }
97
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 28 lower_->Close(fd2);
98
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 28 const int fd_return = upper_->OpenFromTxn(txn);
99
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 28 if (fd_return < 0) {
100 ✗ upper_->AbortTxn(txn);
101 ✗ return fd;
102 }
103
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 28 if (upper_->CommitTxn(txn) < 0) {
104 ✗ upper_->Close(fd_return);
105 ✗ return fd;
106 }
107 28 return fd_return;
108 28 }
109
110
111 84 int TieredCacheManager::StartTxn(const shash::Any &id,
112 uint64_t size,
113 void *txn) {
114 84 const int upper_result = upper_->StartTxn(id, size, txn);
115
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 84 if (lower_readonly_ || (upper_result < 0)) {
116 56 return upper_result;
117 }
118
119 28 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
120 28 const int lower_result = lower_->StartTxn(id, size, txn2);
121
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 28 if (lower_result < 0) {
122 ✗ upper_->AbortTxn(txn);
123 }
124 28 return lower_result;
125 }
126
127
128 147 CacheManager *TieredCacheManager::Create(CacheManager *upper_cache,
129 CacheManager *lower_cache) {
130 TieredCacheManager *cache_mgr = new TieredCacheManager(upper_cache,
131
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 147 lower_cache);
132
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 147 delete cache_mgr->quota_mgr_;
133 147 cache_mgr->quota_mgr_ = upper_cache->quota_mgr();
134
135 147 return cache_mgr;
136 }
137
138
139 56 void TieredCacheManager::CtrlTxn(const Label &label,
140 const int flags,
141 void *txn) {
142 56 upper_->CtrlTxn(label, flags, txn);
143
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 56 if (!lower_readonly_) {
144 28 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
145 28 lower_->CtrlTxn(label, flags, txn2);
146 }
147 56 }
148
149
150 56 int64_t TieredCacheManager::Write(const void *buf, uint64_t size, void *txn) {
151 56 const int upper_result = upper_->Write(buf, size, txn);
152
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 56 if (lower_readonly_ || (upper_result < 0)) {
153 28 return upper_result;
154 }
155
156 28 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
157 28 return lower_->Write(buf, size, txn2);
158 }
159
160
161 28 int TieredCacheManager::Reset(void *txn) {
162
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 28 const int upper_result = upper_->Reset(txn);
163
164 28 int lower_result = upper_result;
165
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 28 if (!lower_readonly_) {
166 ✗ void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
167 ✗ lower_result = lower_->Reset(txn2);
168 }
169
170
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 28 return (upper_result < 0) ? upper_result : lower_result;
171 }
172
173
174 28 int TieredCacheManager::AbortTxn(void *txn) {
175
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 28 const int upper_result = upper_->AbortTxn(txn);
176
177 28 int lower_result = upper_result;
178
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 28 if (!lower_readonly_) {
179 ✗ void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
180 ✗ lower_result = lower_->AbortTxn(txn2);
181 }
182
183
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 28 return (upper_result < 0) ? upper_result : lower_result;
184 }
185
186
187 56 int TieredCacheManager::CommitTxn(void *txn) {
188
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 56 const int upper_result = upper_->CommitTxn(txn);
189
190 56 int lower_result = upper_result;
191
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 56 if (!lower_readonly_) {
192
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 28 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
193
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 28 lower_result = lower_->CommitTxn(txn2);
194 }
195
196
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 56 return (upper_result < 0) ? upper_result : lower_result;
197 }
198
199
200 140 manifest::Breadcrumb TieredCacheManager::LoadBreadcrumb(
201 const std::string &fqrn) {
202 140 manifest::Breadcrumb breadcrumb = upper_->LoadBreadcrumb(fqrn);
203
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 140 if (!breadcrumb.IsValid())
204 140 breadcrumb = lower_->LoadBreadcrumb(fqrn);
205 140 return breadcrumb;
206 }
207
208
209 ✗ bool TieredCacheManager::StoreBreadcrumb(const manifest::Manifest &manifest) {
210 ✗ const bool upper_success = upper_->StoreBreadcrumb(manifest);
211 ✗ bool lower_success = true;
212 ✗ if (!lower_readonly_)
213 ✗ lower_success = lower_->StoreBreadcrumb(manifest);
214 ✗ return upper_success && lower_success;
215 }
216
217
218 ✗ void TieredCacheManager::Spawn() {
219 ✗ upper_->Spawn();
220 ✗ lower_->Spawn();
221 }
222
223
224 588 TieredCacheManager::~TieredCacheManager() {
225 294 quota_mgr_ = NULL; // gets deleted by upper
226
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 294 delete upper_;
227
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 294 delete lower_;
228 588 }
229