| Directory: | cvmfs/ |
|---|---|
| File: | cvmfs/sync_union.cc |
| Date: | 2025-06-22 02:36:02 |
| Exec | Total | Coverage | |
|---|---|---|---|
| Lines: | 24 | 87 | 27.6% |
| Branches: | 10 | 133 | 7.5% |
| Line | Branch | Exec | Source |
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| 1 | /** | ||
| 2 | * This file is part of the CernVM File System | ||
| 3 | */ | ||
| 4 | |||
| 5 | #define __STDC_FORMAT_MACROS | ||
| 6 | |||
| 7 | #include "sync_union.h" | ||
| 8 | |||
| 9 | #include "sync_mediator.h" | ||
| 10 | #include "util/shared_ptr.h" | ||
| 11 | |||
| 12 | namespace publish { | ||
| 13 | |||
| 14 | 42 | SyncUnion::SyncUnion(AbstractSyncMediator *mediator, | |
| 15 | const std::string &rdonly_path, | ||
| 16 | const std::string &union_path, | ||
| 17 | 42 | const std::string &scratch_path) | |
| 18 | 42 | : rdonly_path_(rdonly_path) | |
| 19 |
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42 | , scratch_path_(scratch_path) |
| 20 |
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42 | , union_path_(union_path) |
| 21 | 42 | , mediator_(mediator) | |
| 22 | 84 | , initialized_(false) { } | |
| 23 | |||
| 24 | 42 | bool SyncUnion::Initialize() { | |
| 25 | 42 | mediator_->RegisterUnionEngine(this); | |
| 26 | 42 | initialized_ = true; | |
| 27 | 42 | return true; | |
| 28 | } | ||
| 29 | |||
| 30 | ✗ | SharedPtr<SyncItem> SyncUnion::CreateSyncItem( | |
| 31 | const std::string &relative_parent_path, const std::string &filename, | ||
| 32 | const SyncItemType entry_type) const { | ||
| 33 | const SharedPtr<SyncItem> entry = SharedPtr<SyncItem>( | ||
| 34 | ✗ | new SyncItemNative(relative_parent_path, filename, this, entry_type)); | |
| 35 | |||
| 36 | ✗ | PreprocessSyncItem(entry); | |
| 37 | ✗ | if (entry_type == kItemFile) { | |
| 38 | ✗ | entry->SetExternalData(mediator_->IsExternalData()); | |
| 39 | ✗ | entry->SetDirectIo(mediator_->IsDirectIo()); | |
| 40 | ✗ | if (!(entry->IsValidGraft() && entry->HasCompressionAlgorithm())) { | |
| 41 | ✗ | entry->SetCompressionAlgorithm(mediator_->GetCompressionAlgorithm()); | |
| 42 | } | ||
| 43 | } | ||
| 44 | ✗ | return entry; | |
| 45 | } | ||
| 46 | |||
| 47 | ✗ | void SyncUnion::PreprocessSyncItem(SharedPtr<SyncItem> entry) const { | |
| 48 | ✗ | if (IsWhiteoutEntry(entry)) { | |
| 49 | ✗ | entry->MarkAsWhiteout(UnwindWhiteoutFilename(entry)); | |
| 50 | } | ||
| 51 | |||
| 52 | ✗ | if (entry->IsDirectory() && IsOpaqueDirectory(entry)) { | |
| 53 | ✗ | entry->MarkAsOpaqueDirectory(); | |
| 54 | } | ||
| 55 | } | ||
| 56 | |||
| 57 | ✗ | bool SyncUnion::IgnoreFilePredicate(const std::string &parent_dir, | |
| 58 | const std::string &filename) { | ||
| 59 | ✗ | return false; | |
| 60 | } | ||
| 61 | |||
| 62 | ✗ | bool SyncUnion::ProcessDirectory(const string &parent_dir, | |
| 63 | const string &dir_name) { | ||
| 64 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, "SyncUnion::ProcessDirectory(%s, %s)", | |
| 65 | parent_dir.c_str(), dir_name.c_str()); | ||
| 66 | const SharedPtr<SyncItem> entry = | ||
| 67 | ✗ | CreateSyncItem(parent_dir, dir_name, kItemDir); | |
| 68 | ✗ | return ProcessDirectory(entry); | |
| 69 | } | ||
| 70 | |||
| 71 | ✗ | bool SyncUnion::ProcessDirectory(SharedPtr<SyncItem> entry) { | |
| 72 | ✗ | if (entry->IsNew()) { | |
| 73 | ✗ | mediator_->Add(entry); | |
| 74 | // Recursion stops here. All content of new directory | ||
| 75 | // is added later by the SyncMediator | ||
| 76 | ✗ | return false; | |
| 77 | } else { // directory already existed... | ||
| 78 | ✗ | if (entry->IsOpaqueDirectory()) { // was directory completely overwritten? | |
| 79 | ✗ | mediator_->Replace(entry); | |
| 80 | ✗ | return false; // <-- replace does not need any further recursion | |
| 81 | } else { // directory was just changed internally... only touch needed | ||
| 82 | ✗ | mediator_->Touch(entry); | |
| 83 | ✗ | return true; | |
| 84 | } | ||
| 85 | } | ||
| 86 | } | ||
| 87 | |||
| 88 | // We don't have the directory that we are processing in the fs, we | ||
| 89 | // cannot recurse inside the directory. | ||
| 90 | // If the directory already exists, we simply remove it and we put it back the | ||
| 91 | // new one (some attributes may change) | ||
| 92 | // If it does not exists we simply add it. | ||
| 93 | 126 | bool SyncUnion::ProcessUnmaterializedDirectory(SharedPtr<SyncItem> entry) { | |
| 94 |
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126 | if (entry->IsNew()) { |
| 95 |
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98 | mediator_->AddUnmaterializedDirectory(entry); |
| 96 | } | ||
| 97 | 126 | return true; | |
| 98 | } | ||
| 99 | |||
| 100 | ✗ | void SyncUnion::ProcessRegularFile(const string &parent_dir, | |
| 101 | const string &filename) { | ||
| 102 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, "SyncUnion::ProcessRegularFile(%s, %s)", | |
| 103 | parent_dir.c_str(), filename.c_str()); | ||
| 104 | const SharedPtr<SyncItem> entry = | ||
| 105 | ✗ | CreateSyncItem(parent_dir, filename, kItemFile); | |
| 106 | ✗ | ProcessFile(entry); | |
| 107 | } | ||
| 108 | |||
| 109 | ✗ | void SyncUnion::ProcessSymlink(const string &parent_dir, | |
| 110 | const string &link_name) { | ||
| 111 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, "SyncUnion::ProcessSymlink(%s, %s)", | |
| 112 | parent_dir.c_str(), link_name.c_str()); | ||
| 113 | const SharedPtr<SyncItem> entry = | ||
| 114 | ✗ | CreateSyncItem(parent_dir, link_name, kItemSymlink); | |
| 115 | ✗ | ProcessFile(entry); | |
| 116 | } | ||
| 117 | |||
| 118 | 140 | void SyncUnion::ProcessFile(SharedPtr<SyncItem> entry) { | |
| 119 |
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140 | LogCvmfs(kLogUnionFs, kLogDebug, "SyncUnion::ProcessFile(%s)", |
| 120 | 280 | entry->filename().c_str()); | |
| 121 |
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140 | if (entry->IsWhiteout()) { |
| 122 | ✗ | mediator_->Remove(entry); | |
| 123 | } else { | ||
| 124 |
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140 | if (entry->IsNew()) { |
| 125 |
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140 | LogCvmfs(kLogUnionFs, kLogVerboseMsg, "processing file [%s] as new (add)", |
| 126 | 280 | entry->filename().c_str()); | |
| 127 |
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140 | mediator_->Add(entry); |
| 128 | } else { | ||
| 129 | ✗ | LogCvmfs(kLogUnionFs, kLogVerboseMsg, | |
| 130 | "processing file [%s] as existing (touch)", | ||
| 131 | ✗ | entry->filename().c_str()); | |
| 132 | ✗ | mediator_->Touch(entry); | |
| 133 | } | ||
| 134 | } | ||
| 135 | 140 | } | |
| 136 | |||
| 137 | ✗ | void SyncUnion::EnterDirectory(const string &parent_dir, | |
| 138 | const string &dir_name) { | ||
| 139 | const SharedPtr<SyncItem> entry = | ||
| 140 | ✗ | CreateSyncItem(parent_dir, dir_name, kItemDir); | |
| 141 | ✗ | mediator_->EnterDirectory(entry); | |
| 142 | } | ||
| 143 | |||
| 144 | ✗ | void SyncUnion::LeaveDirectory(const string &parent_dir, | |
| 145 | const string &dir_name) { | ||
| 146 | const SharedPtr<SyncItem> entry = | ||
| 147 | ✗ | CreateSyncItem(parent_dir, dir_name, kItemDir); | |
| 148 | ✗ | mediator_->LeaveDirectory(entry); | |
| 149 | } | ||
| 150 | |||
| 151 | ✗ | void SyncUnion::ProcessCharacterDevice(const std::string &parent_dir, | |
| 152 | const std::string &filename) { | ||
| 153 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, | |
| 154 | "SyncUnionOverlayfs::ProcessCharacterDevice(%s, %s)", | ||
| 155 | parent_dir.c_str(), filename.c_str()); | ||
| 156 | const SharedPtr<SyncItem> entry = | ||
| 157 | ✗ | CreateSyncItem(parent_dir, filename, kItemCharacterDevice); | |
| 158 | ✗ | ProcessFile(entry); | |
| 159 | } | ||
| 160 | |||
| 161 | ✗ | void SyncUnion::ProcessBlockDevice(const std::string &parent_dir, | |
| 162 | const std::string &filename) { | ||
| 163 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, | |
| 164 | "SyncUnionOverlayfs::ProcessBlockDevice(%s, %s)", parent_dir.c_str(), | ||
| 165 | filename.c_str()); | ||
| 166 | const SharedPtr<SyncItem> entry = | ||
| 167 | ✗ | CreateSyncItem(parent_dir, filename, kItemBlockDevice); | |
| 168 | ✗ | ProcessFile(entry); | |
| 169 | } | ||
| 170 | |||
| 171 | ✗ | void SyncUnion::ProcessFifo(const std::string &parent_dir, | |
| 172 | const std::string &filename) { | ||
| 173 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, "SyncUnionOverlayfs::ProcessFifo(%s, %s)", | |
| 174 | parent_dir.c_str(), filename.c_str()); | ||
| 175 | const SharedPtr<SyncItem> entry = | ||
| 176 | ✗ | CreateSyncItem(parent_dir, filename, kItemFifo); | |
| 177 | ✗ | ProcessFile(entry); | |
| 178 | } | ||
| 179 | |||
| 180 | ✗ | void SyncUnion::ProcessSocket(const std::string &parent_dir, | |
| 181 | const std::string &filename) { | ||
| 182 | ✗ | LogCvmfs(kLogUnionFs, kLogDebug, "SyncUnionOverlayfs::ProcessSocket(%s, %s)", | |
| 183 | parent_dir.c_str(), filename.c_str()); | ||
| 184 | const SharedPtr<SyncItem> entry = | ||
| 185 | ✗ | CreateSyncItem(parent_dir, filename, kItemSocket); | |
| 186 | ✗ | ProcessFile(entry); | |
| 187 | } | ||
| 188 | |||
| 189 | } // namespace publish | ||
| 190 |