GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/cache_tiered.cc
Date: 2026-06-28 02:36:10
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 "quota.h" // IWYU pragma: keep - complete type needed for delete
13 #include "util/posix.h" // IWYU pragma: keep
14
15
16 ✗ std::string TieredCacheManager::Describe() {
17 return "Tiered Cache\n"
18 " - upper layer: "
19 ✗ + upper_->Describe() + " - lower layer: " + lower_->Describe();
20 }
21
22
23 ✗ bool TieredCacheManager::DoFreeState(void *data) {
24 ✗ SavedState *state = reinterpret_cast<SavedState *>(data);
25 ✗ upper_->FreeState(-1, state->state_upper);
26 ✗ lower_->FreeState(-1, state->state_lower);
27 ✗ delete state;
28 ✗ return true;
29 }
30
31
32 ✗ int TieredCacheManager::DoRestoreState(void *data) {
33 ✗ SavedState *state = reinterpret_cast<SavedState *>(data);
34 ✗ const int new_root_fd = upper_->RestoreState(-1, state->state_upper);
35 // The lower cache layer does not keep the root catalog open
36 ✗ const int retval = lower_->RestoreState(-1, state->state_lower);
37 ✗ assert(retval == -1);
38 ✗ return new_root_fd;
39 }
40
41
42 ✗ void *TieredCacheManager::DoSaveState() {
43 ✗ SavedState *state = new SavedState();
44 ✗ state->state_upper = upper_->SaveState(-1);
45 ✗ state->state_lower = lower_->SaveState(-1);
46 ✗ return state;
47 }
48
49
50 246 int TieredCacheManager::Open(const LabeledObject &object) {
51
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 246 const int fd = upper_->Open(object);
52
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 246 if ((fd >= 0) || (fd != -ENOENT)) {
53 41 return fd;
54 }
55
56
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 205 const int fd2 = lower_->Open(object);
57
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 205 if (fd2 < 0) {
58 164 return fd;
59 } // NOTE: use error code from upper.
60
61 // Lower cache hit; upper cache miss. Copy object into the upper cache.
62
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 41 const int64_t size = lower_->GetSize(fd2);
63
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 41 if (size < 0) {
64 ✗ lower_->Close(fd2);
65 ✗ return fd;
66 }
67
68
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 41 void *txn = alloca(upper_->SizeOfTxn());
69
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 41 if (upper_->StartTxn(object.id, size, txn) < 0) {
70 ✗ lower_->Close(fd2);
71 ✗ return fd;
72 }
73
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 41 upper_->CtrlTxn(object.label, 0, txn);
74
75 41 std::vector<char> m_buffer;
76
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 41 m_buffer.resize(kCopyBufferSize);
77 41 uint64_t remaining = size;
78 41 uint64_t offset = 0;
79
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 82 while (remaining > 0) {
80 41 const unsigned nbytes = remaining > kCopyBufferSize ? kCopyBufferSize
81 : remaining;
82
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 41 int64_t result = lower_->Pread(fd2, &m_buffer[0], nbytes, offset);
83 // The file we are reading is supposed to be exactly `size` bytes.
84
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 41 if ((result < 0) || (result != nbytes)) {
85 ✗ lower_->Close(fd2);
86 ✗ upper_->AbortTxn(txn);
87 ✗ return fd;
88 }
89
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 41 result = upper_->Write(&m_buffer[0], nbytes, txn);
90
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 41 if (result < 0) {
91 ✗ lower_->Close(fd2);
92 ✗ upper_->AbortTxn(txn);
93 ✗ return fd;
94 }
95 41 offset += nbytes;
96 41 remaining -= nbytes;
97 }
98
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 41 lower_->Close(fd2);
99
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 41 const int fd_return = upper_->OpenFromTxn(txn);
100
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 41 if (fd_return < 0) {
101 ✗ upper_->AbortTxn(txn);
102 ✗ return fd;
103 }
104
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 41 if (upper_->CommitTxn(txn) < 0) {
105 ✗ upper_->Close(fd_return);
106 ✗ return fd;
107 }
108 41 return fd_return;
109 41 }
110
111
112 123 int TieredCacheManager::StartTxn(const shash::Any &id,
113 uint64_t size,
114 void *txn) {
115 123 const int upper_result = upper_->StartTxn(id, size, txn);
116
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 123 if (lower_readonly_ || (upper_result < 0)) {
117 82 return upper_result;
118 }
119
120 41 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
121 41 const int lower_result = lower_->StartTxn(id, size, txn2);
122
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 41 if (lower_result < 0) {
123 ✗ upper_->AbortTxn(txn);
124 }
125 41 return lower_result;
126 }
127
128
129 204 CacheManager *TieredCacheManager::Create(CacheManager *upper_cache,
130 CacheManager *lower_cache) {
131 TieredCacheManager *cache_mgr = new TieredCacheManager(upper_cache,
132
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 204 lower_cache);
133
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 204 delete cache_mgr->quota_mgr_;
134 204 cache_mgr->quota_mgr_ = upper_cache->quota_mgr();
135
136 204 return cache_mgr;
137 }
138
139
140 82 void TieredCacheManager::CtrlTxn(const Label &label,
141 const int flags,
142 void *txn) {
143 82 upper_->CtrlTxn(label, flags, txn);
144
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 82 if (!lower_readonly_) {
145 41 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
146 41 lower_->CtrlTxn(label, flags, txn2);
147 }
148 82 }
149
150
151 82 int64_t TieredCacheManager::Write(const void *buf, uint64_t size, void *txn) {
152 82 const int upper_result = upper_->Write(buf, size, txn);
153
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 82 if (lower_readonly_ || (upper_result < 0)) {
154 41 return upper_result;
155 }
156
157 41 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
158 41 return lower_->Write(buf, size, txn2);
159 }
160
161
162 41 int TieredCacheManager::Reset(void *txn) {
163
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 41 const int upper_result = upper_->Reset(txn);
164
165 41 int lower_result = upper_result;
166
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 41 if (!lower_readonly_) {
167 ✗ void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
168 ✗ lower_result = lower_->Reset(txn2);
169 }
170
171
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 41 return (upper_result < 0) ? upper_result : lower_result;
172 }
173
174
175 41 int TieredCacheManager::AbortTxn(void *txn) {
176
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 41 const int upper_result = upper_->AbortTxn(txn);
177
178 41 int lower_result = upper_result;
179
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 41 if (!lower_readonly_) {
180 ✗ void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
181 ✗ lower_result = lower_->AbortTxn(txn2);
182 }
183
184
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 41 return (upper_result < 0) ? upper_result : lower_result;
185 }
186
187
188 82 int TieredCacheManager::CommitTxn(void *txn) {
189
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 82 const int upper_result = upper_->CommitTxn(txn);
190
191 82 int lower_result = upper_result;
192
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 82 if (!lower_readonly_) {
193
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 41 void *txn2 = static_cast<char *>(txn) + upper_->SizeOfTxn();
194
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 41 lower_result = lower_->CommitTxn(txn2);
195 }
196
197
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 82 return (upper_result < 0) ? upper_result : lower_result;
198 }
199
200
201 196 manifest::Breadcrumb TieredCacheManager::LoadBreadcrumb(
202 const std::string &fqrn) {
203 196 manifest::Breadcrumb breadcrumb = upper_->LoadBreadcrumb(fqrn);
204
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 196 if (!breadcrumb.IsValid())
205 196 breadcrumb = lower_->LoadBreadcrumb(fqrn);
206 196 return breadcrumb;
207 }
208
209
210 ✗ bool TieredCacheManager::StoreBreadcrumb(const manifest::Manifest &manifest) {
211 ✗ const bool upper_success = upper_->StoreBreadcrumb(manifest);
212 ✗ bool lower_success = true;
213 ✗ if (!lower_readonly_)
214 ✗ lower_success = lower_->StoreBreadcrumb(manifest);
215 ✗ return upper_success && lower_success;
216 }
217
218
219 ✗ void TieredCacheManager::Spawn() {
220 ✗ upper_->Spawn();
221 ✗ lower_->Spawn();
222 }
223
224
225 816 TieredCacheManager::~TieredCacheManager() {
226 408 quota_mgr_ = NULL; // gets deleted by upper
227
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 408 delete upper_;
228
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 408 delete lower_;
229 816 }
230